From 428b43fd728a19ec41a6e114e9b83974e12096fd Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Tue, 30 Jul 2019 16:21:01 -0700 Subject: [PATCH 01/17] Update lebab conversion --- .eslintrc.json | 156 +- Gruntfile.js | 665 ++++---- lebab-convert.js | 33 + lib/less-browser/add-default-options.js | 8 +- lib/less-browser/bootstrap.js | 10 +- lib/less-browser/browser.js | 25 +- lib/less-browser/cache.js | 18 +- lib/less-browser/error-reporting.js | 53 +- lib/less-browser/file-manager.js | 38 +- lib/less-browser/image-size.js | 6 +- lib/less-browser/index.js | 121 +- lib/less-browser/log-listener.js | 13 +- lib/less-browser/plugin-loader.js | 28 +- lib/less-browser/utils.js | 4 +- lib/less-node/environment.js | 4 +- lib/less-node/file-manager.js | 258 +-- lib/less-node/fs.js | 4 +- lib/less-node/image-size.js | 34 +- lib/less-node/index.js | 16 +- lib/less-node/lessc-helper.js | 9 +- lib/less-node/plugin-loader.js | 80 +- lib/less-node/url-file-manager.js | 38 +- lib/less/constants.js | 2 +- lib/less/contexts.js | 27 +- lib/less/data/colors.js | 2 +- lib/less/data/index.js | 2 +- lib/less/data/unit-conversions.js | 2 +- lib/less/default-options.js | 113 +- lib/less/environment/abstract-file-manager.js | 54 +- .../environment/abstract-plugin-loader.js | 280 ++-- lib/less/environment/environment-api.js | 2 +- lib/less/environment/environment.js | 85 +- lib/less/environment/file-manager-api.js | 2 +- lib/less/functions/boolean.js | 6 +- lib/less/functions/color-blending.js | 29 +- lib/less/functions/color.js | 76 +- lib/less/functions/data-uri.js | 51 +- lib/less/functions/default.js | 11 +- lib/less/functions/function-caller.js | 81 +- lib/less/functions/function-registry.js | 6 +- lib/less/functions/index.js | 4 +- lib/less/functions/list.js | 50 +- lib/less/functions/math-helper.js | 8 +- lib/less/functions/math.js | 14 +- lib/less/functions/number.js | 40 +- lib/less/functions/string.js | 22 +- lib/less/functions/svg.js | 47 +- lib/less/functions/types.js | 47 +- lib/less/import-manager.js | 282 ++-- lib/less/index.js | 29 +- lib/less/less-error.js | 57 +- lib/less/logger.js | 8 +- lib/less/parse-tree.js | 99 +- lib/less/parse.js | 45 +- lib/less/parser/chunker.js | 24 +- lib/less/parser/parser-input.js | 193 +-- lib/less/parser/parser.js | 463 ++++-- lib/less/plugin-manager.js | 279 ++-- lib/less/render.js | 20 +- lib/less/source-map-builder.js | 119 +- lib/less/source-map-output.js | 234 +-- lib/less/transform-tree.js | 31 +- lib/less/tree/anonymous.js | 60 +- lib/less/tree/assignment.js | 50 +- lib/less/tree/atrule.js | 269 ++-- lib/less/tree/attribute.js | 51 +- lib/less/tree/call.js | 164 +- lib/less/tree/color.js | 385 ++--- lib/less/tree/combinator.js | 35 +- lib/less/tree/comment.js | 46 +- lib/less/tree/condition.js | 74 +- lib/less/tree/debug-info.js | 30 +- lib/less/tree/declaration.js | 189 +-- lib/less/tree/detached-ruleset.js | 45 +- lib/less/tree/dimension.js | 263 +-- lib/less/tree/element.js | 123 +- lib/less/tree/expression.js | 120 +- lib/less/tree/extend.js | 112 +- lib/less/tree/import.js | 283 ++-- lib/less/tree/index.js | 4 +- lib/less/tree/javascript.js | 52 +- lib/less/tree/js-eval-node.js | 32 +- lib/less/tree/keyword.js | 19 +- lib/less/tree/media.js | 259 +-- lib/less/tree/mixin-call.js | 339 ++-- lib/less/tree/mixin-definition.js | 374 ++--- lib/less/tree/namespace-value.js | 140 +- lib/less/tree/negative.js | 40 +- lib/less/tree/node.js | 257 +-- lib/less/tree/operation.js | 98 +- lib/less/tree/paren.js | 32 +- lib/less/tree/property.js | 123 +- lib/less/tree/quoted.js | 113 +- lib/less/tree/ruleset.js | 1417 +++++++++-------- lib/less/tree/selector.js | 241 +-- lib/less/tree/unicode-descriptor.js | 14 +- lib/less/tree/unit.js | 212 +-- lib/less/tree/url.js | 99 +- lib/less/tree/value.js | 69 +- lib/less/tree/variable-call.js | 72 +- lib/less/tree/variable.js | 107 +- lib/less/utils.js | 47 +- lib/less/visitors/extend-visitor.js | 269 ++-- lib/less/visitors/import-sequencer.js | 90 +- lib/less/visitors/import-visitor.js | 45 +- lib/less/visitors/index.js | 4 +- lib/less/visitors/join-selector-visitor.js | 58 +- .../visitors/set-tree-visibility-visitor.js | 67 +- lib/less/visitors/to-css-visitor.js | 117 +- lib/less/visitors/visitor.js | 79 +- package.json | 8 + 111 files changed, 6239 insertions(+), 5524 deletions(-) create mode 100644 lebab-convert.js diff --git a/.eslintrc.json b/.eslintrc.json index 6a9e809eb..9713bafa8 100644 --- a/.eslintrc.json +++ b/.eslintrc.json @@ -1,89 +1,71 @@ { - "env": { - "node": true - }, - "globals": {}, - - "rules": { - "no-eval": 2, - "no-use-before-define": [ - 2, - { - "functions": false - } - ], - "no-undef": 0, - "no-unused-vars": 1, - "no-caller": 2, - "no-eq-null": 1, - "guard-for-in": 2, - "no-implicit-coercion": [ - 2, - { - "boolean": false, - "string": true, - "number": true - } - ], - "no-with": 2, - "no-mixed-spaces-and-tabs": 2, - "no-multiple-empty-lines": 2, - "dot-location": [ - 2, - "property" - ], - "operator-linebreak": [ - 0, - "after" - ], - "keyword-spacing": [ - 2, - {} - ], - "space-unary-ops": [ - 2, - { - "words": false, - "nonwords": false - } - ], - "no-spaced-func": 2, - "space-before-function-paren": [ - 1, - { - "anonymous": "ignore", - "named": "never" - } - ], - "comma-dangle": [ - 2, - "never" - ], - "no-trailing-spaces": 0, - "max-len": [ - 2, - 160 - ], - "comma-style": [ - 2, - "last" - ], - "curly": [ - 2, - "all" - ], - "space-infix-ops": 2, - "spaced-comment": 1, - "space-before-blocks": [ - 2, - "always" - ], - "indent": [ - 2, - 4, - { - "SwitchCase": 1 - } - ] - } + "parser": "@typescript-eslint/parser", + "parserOptions": { + "ecmaVersion": 2018, + "sourceType": "module" + }, + "plugins": ["@typescript-eslint"], + "env": { + "browser": true, + "node": true + }, + "globals": {}, + "rules": { + "no-eval": 2, + "no-use-before-define": [ + 2, + { + "functions": false + } + ], + "no-undef": 0, + "no-unused-vars": 1, + "no-caller": 2, + "no-eq-null": 1, + "guard-for-in": 2, + "no-implicit-coercion": [ + 2, + { + "boolean": false, + "string": true, + "number": true + } + ], + "no-with": 2, + "no-mixed-spaces-and-tabs": 2, + "no-multiple-empty-lines": 2, + "dot-location": [2, "property"], + "operator-linebreak": [0, "after"], + "keyword-spacing": [2, {}], + "space-unary-ops": [ + 2, + { + "words": false, + "nonwords": false + } + ], + "no-spaced-func": 2, + "space-before-function-paren": [ + 1, + { + "anonymous": "ignore", + "named": "never" + } + ], + "comma-dangle": [2, "never"], + "no-trailing-spaces": 0, + "max-len": [2, 160], + "comma-style": [2, "last"], + "curly": [2, "all"], + "space-infix-ops": 2, + "spaced-comment": 1, + "space-before-blocks": [2, "always"], + "indent": [ + 2, + 4, + { + "SwitchCase": 1 + } + ] + } } diff --git a/Gruntfile.js b/Gruntfile.js index f92ec2827..3ab8c6448 100644 --- a/Gruntfile.js +++ b/Gruntfile.js @@ -1,111 +1,126 @@ -'use strict'; +"use strict"; -module.exports = function (grunt) { - - - grunt.option('stack', true) +module.exports = function(grunt) { + grunt.option("stack", true); // Report the elapsed execution time of tasks. - require('time-grunt')(grunt); + require("time-grunt")(grunt); var COMPRESS_FOR_TESTS = false; - var git = require('git-rev'); + var git = require("git-rev"); + var babel = require('rollup-plugin-babel'); - // Sauce Labs browser + // Sauce Labs browser var browsers = [ // Desktop browsers { - browserName: 'chrome', - version: 'latest', - platform: 'Windows 7' + browserName: "chrome", + version: "latest", + platform: "Windows 7" }, { - browserName: 'firefox', - version: 'latest', - platform: 'Linux' + browserName: "firefox", + version: "latest", + platform: "Linux" }, { - browserName: 'safari', - version: '9', - platform: 'OS X 10.11' + browserName: "safari", + version: "9", + platform: "OS X 10.11" }, { - browserName: 'internet explorer', - version: '8', - platform: 'Windows XP' + browserName: "internet explorer", + version: "8", + platform: "Windows XP" }, { - browserName: 'internet explorer', - version: '11', - platform: 'Windows 8.1' + browserName: "internet explorer", + version: "11", + platform: "Windows 8.1" }, { - browserName: 'edge', - version: '13', - platform: 'Windows 10' + browserName: "edge", + version: "13", + platform: "Windows 10" }, // Mobile browsers { - browserName: 'ipad', - deviceName: 'iPad Air Simulator', - deviceOrientation: 'portrait', - version: '8.4', - platform: 'OS X 10.9' + browserName: "ipad", + deviceName: "iPad Air Simulator", + deviceOrientation: "portrait", + version: "8.4", + platform: "OS X 10.9" }, { - browserName: 'iphone', - deviceName: 'iPhone 5 Simulator', - deviceOrientation: 'portrait', - version: '9.3', - platform: 'OS X 10.11' + browserName: "iphone", + deviceName: "iPhone 5 Simulator", + deviceOrientation: "portrait", + version: "9.3", + platform: "OS X 10.11" }, { - browserName: 'android', - deviceName: 'Google Nexus 7 HD Emulator', - deviceOrientation: 'portrait', - version: '4.4', - platform: 'Linux' + browserName: "android", + deviceName: "Google Nexus 7 HD Emulator", + deviceOrientation: "portrait", + version: "4.4", + platform: "Linux" } ]; var sauceJobs = {}; - var browserTests = [ - 'filemanager-plugin', - 'visitor-plugin', - 'global-vars', - 'modify-vars', - 'production', - 'rootpath-relative', - 'rootpath-rewrite-urls', - 'rootpath', - 'relative-urls', - 'rewrite-urls', - 'browser', - 'no-js-errors', - 'legacy' + "filemanager-plugin", + "visitor-plugin", + "global-vars", + "modify-vars", + "production", + "rootpath-relative", + "rootpath-rewrite-urls", + "rootpath", + "relative-urls", + "rewrite-urls", + "browser", + "no-js-errors", + "legacy" ]; function makeJob(testName) { sauceJobs[testName] = { options: { - urls: testName === 'all' ? - browserTests.map(function(name) { - return 'http://localhost:8081/tmp/browser/test-runner-' + name + '.html'; - }) : - ['http://localhost:8081/tmp/browser/test-runner-' + testName + '.html'], - testname: testName === 'all' ? 'Unit Tests for Less.js' : testName, + urls: + testName === "all" + ? browserTests.map(function(name) { + return ( + "http://localhost:8081/tmp/browser/test-runner-" + + name + + ".html" + ); + }) + : [ + "http://localhost:8081/tmp/browser/test-runner-" + + testName + + ".html" + ], + testname: + testName === "all" ? "Unit Tests for Less.js" : testName, browsers: browsers, - public: 'public', + public: "public", recordVideo: false, videoUploadOnPass: false, - recordScreenshots: process.env.TRAVIS_BRANCH !== 'master', - build: process.env.TRAVIS_BRANCH === 'master' ? process.env.TRAVIS_JOB_ID : undefined, - tags: [process.env.TRAVIS_BUILD_NUMBER, process.env.TRAVIS_PULL_REQUEST, process.env.TRAVIS_BRANCH], + recordScreenshots: process.env.TRAVIS_BRANCH !== "master", + build: + process.env.TRAVIS_BRANCH === "master" + ? process.env.TRAVIS_JOB_ID + : undefined, + tags: [ + process.env.TRAVIS_BUILD_NUMBER, + process.env.TRAVIS_PULL_REQUEST, + process.env.TRAVIS_BRANCH + ], statusCheckAttempts: -1, sauceConfig: { - 'idle-timeout': 100 + "idle-timeout": 100 }, throttled: 5, onTestComplete: function(result, callback) { @@ -126,52 +141,61 @@ module.exports = function (grunt) { var pass = process.env.SAUCE_ACCESS_KEY; git.short(function(hash) { - require('phin')({ - method: 'PUT', - url: ['https://saucelabs.com/rest/v1', user, 'jobs', result.job_id].join('/'), - auth: { user: user, pass: pass }, - data: { - passed: result.passed, - build: 'build-' + hash + require("phin")( + { + method: "PUT", + url: [ + "https://saucelabs.com/rest/v1", + user, + "jobs", + result.job_id + ].join("/"), + auth: { user: user, pass: pass }, + data: { + passed: result.passed, + build: "build-" + hash + } + }, + function(error, response) { + if (error) { + console.log(error); + callback(error); + } else if (response.statusCode !== 200) { + console.log(response); + callback( + new Error("Unexpected response status") + ); + } else { + callback(null, result.passed); + } } - }, function (error, response) { - if (error) { - console.log(error); - callback(error); - } else if (response.statusCode !== 200) { - console.log(response); - callback(new Error('Unexpected response status')); - } else { - callback(null, result.passed); - } - }); + ); }); - } } }; } // Make the SauceLabs jobs - (['all'].concat(browserTests)).map(makeJob); + ["all"].concat(browserTests).map(makeJob); // Project configuration. grunt.initConfig({ - - pkg: grunt.file.readJSON('package.json'), + pkg: grunt.file.readJSON("package.json"), meta: { copyright: 'Copyright (c) 2009-<%= grunt.template.today("yyyy") %>', - banner: '/*!\n' + - ' * Less - <%= pkg.description %> v<%= pkg.version %>\n' + - ' * http://lesscss.org\n' + - ' *\n' + - ' * <%= meta.copyright %>, <%= pkg.author.name %> <<%= pkg.author.email %>>\n' + - ' * Licensed under the <%= pkg.license %> License.\n' + - ' *\n' + - ' */\n\n' + - ' /**' + - ' * @license <%= pkg.license %>\n' + - ' */\n\n' + banner: + "/*!\n" + + " * Less - <%= pkg.description %> v<%= pkg.version %>\n" + + " * http://lesscss.org\n" + + " *\n" + + " * <%= meta.copyright %>, <%= pkg.author.name %> <<%= pkg.author.email %>>\n" + + " * Licensed under the <%= pkg.license %> License.\n" + + " *\n" + + " */\n\n" + + " /**" + + " * @license <%= pkg.license %>\n" + + " */\n\n" }, shell: { @@ -183,100 +207,132 @@ module.exports = function (grunt) { } }, test: { - command: 'node test/index.js' + command: "node test/index.js" }, benchmark: { - command: 'node benchmark/index.js' + command: "node benchmark/index.js" }, - opts: { // test running with all current options (using `opts` since `options` means something already) - command: [ // @TODO: make this more thorough + opts: { + // test running with all current options (using `opts` since `options` means something already) + command: [ + // @TODO: make this more thorough // CURRENT OPTIONS // --math - 'node bin/lessc --math=always test/less/lazy-eval.less tmp/lazy-eval.css', - 'node bin/lessc --math=parens-division test/less/lazy-eval.less tmp/lazy-eval.css', - 'node bin/lessc --math=parens test/less/lazy-eval.less tmp/lazy-eval.css', - 'node bin/lessc --math=strict test/less/lazy-eval.less tmp/lazy-eval.css', - 'node bin/lessc --math=strict-legacy test/less/lazy-eval.less tmp/lazy-eval.css', + "node bin/lessc --math=always test/less/lazy-eval.less tmp/lazy-eval.css", + "node bin/lessc --math=parens-division test/less/lazy-eval.less tmp/lazy-eval.css", + "node bin/lessc --math=parens test/less/lazy-eval.less tmp/lazy-eval.css", + "node bin/lessc --math=strict test/less/lazy-eval.less tmp/lazy-eval.css", + "node bin/lessc --math=strict-legacy test/less/lazy-eval.less tmp/lazy-eval.css", // DEPRECATED OPTIONS // --strict-math - 'node bin/lessc --strict-math=on test/less/lazy-eval.less tmp/lazy-eval.css', - ].join(' && ') + "node bin/lessc --strict-math=on test/less/lazy-eval.less tmp/lazy-eval.css" + ].join(" && ") }, plugin: { command: [ 'node bin/lessc --clean-css="--s1 --advanced" test/less/lazy-eval.less tmp/lazy-eval.css', - 'cd lib', + "cd lib", 'node ../bin/lessc --clean-css="--s1 --advanced" ../test/less/lazy-eval.less ../tmp/lazy-eval.css', - 'cd ..', + "cd ..", // Test multiple plugins 'node bin/lessc --plugin=clean-css="--s1 --advanced" --plugin=autoprefix="ie 11,Edge >= 13,Chrome >= 47,Firefox >= 45,iOS >= 9.2,Safari >= 9" test/less/lazy-eval.less tmp/lazy-eval.css' - ].join(' && ') + ].join(" && ") }, - 'sourcemap-test': { // quoted value doesn't seem to get picked up by time-grunt, or isn't output, at least; maybe just "sourcemap" is fine? + "sourcemap-test": { + // quoted value doesn't seem to get picked up by time-grunt, or isn't output, at least; maybe just "sourcemap" is fine? command: [ - 'node bin/lessc --source-map=test/sourcemaps/maps/import-map.map test/less/import.less test/sourcemaps/import.css', - 'node bin/lessc --source-map test/less/sourcemaps/basic.less test/sourcemaps/basic.css' - ].join(' && ') - }, + "node bin/lessc --source-map=test/sourcemaps/maps/import-map.map test/less/import.less test/sourcemaps/import.css", + "node bin/lessc --source-map test/less/sourcemaps/basic.less test/sourcemaps/basic.css" + ].join(" && ") + } }, browserify: { browser: { - src: ['./lib/less-browser/bootstrap.js'], + src: ["./lib/less-browser/bootstrap.js"], options: { - exclude: ['promise'], + exclude: ["promise"], browserifyOptions: { - standalone: 'less', - noParse: ['clone'] + standalone: "less", + noParse: ["clone"] } }, - dest: 'tmp/less.js' + dest: "tmp/less.js" } }, concat: { options: { - stripBanners: 'all', - banner: '<%= meta.banner %>' + stripBanners: "all", + banner: "<%= meta.banner %>" }, browsertest: { - src: COMPRESS_FOR_TESTS ? '<%= uglify.test.dest %>' : '<%= browserify.browser.dest %>', - dest: 'test/browser/less.js' + src: COMPRESS_FOR_TESTS + ? "<%= uglify.test.dest %>" + : "<%= browserify.browser.dest %>", + dest: "test/browser/less.js" }, dist: { - src: '<%= browserify.browser.dest %>', - dest: 'dist/less.js' + src: "<%= browserify.browser.dest %>", + dest: "dist/less.js" } }, uglify: { options: { - banner: '<%= meta.banner %>', + banner: "<%= meta.banner %>", mangle: true, compress: { pure_getters: true } }, dist: { - src: ['<%= concat.dist.dest %>'], - dest: 'dist/less.min.js' + src: ["<%= concat.dist.dest %>"], + dest: "dist/less.min.js" }, test: { - src: '<%= browserify.browser.dest %>', - dest: 'tmp/less.min.js' + src: "<%= browserify.browser.dest %>", + dest: "tmp/less.min.js" } }, eslint: { - target: ['Gruntfile.js', - 'test/**/*.js', - 'lib/less*/**/*.js', - 'bin/lessc', - '!test/browser/jasmine-jsreporter.js', - '!test/less/errors/plugin/plugin-error.js' + target: [ + "Gruntfile.js", + "test/**/*.js", + "lib/less*/**/*.js", + "bin/lessc", + "!test/browser/jasmine-jsreporter.js", + "!test/less/errors/plugin/plugin-error.js" ], options: { - configFile: '.eslintrc.json' + configFile: ".eslintrc.json" + } + }, + + rollup: { + browser: { + input: './lib/less-browser/index.js', + plugins: [ + babel({}) + ], + output: { + file: './dist/less.js', + format: 'umd', + name: 'less' + } + }, + node: { + input: './lib/less-node/index.js', + plugins: [ + babel({ + exclude: 'node_modules/**' + }) + ], + output: { + file: './dist/less.cjs.js', + format: 'cjs' + } } }, @@ -291,287 +347,312 @@ module.exports = function (grunt) { jasmine: { options: { keepRunner: true, - host: 'http://localhost:8081/', + host: "http://localhost:8081/", vendor: [ - './node_modules/phantomjs-polyfill-object-assign/object-assign-polyfill.js', - 'test/browser/vendor/promise.js', - 'test/browser/jasmine-jsreporter.js', - 'test/browser/common.js', - 'test/browser/less.js' + "./node_modules/phantomjs-polyfill-object-assign/object-assign-polyfill.js", + "test/browser/vendor/promise.js", + "test/browser/jasmine-jsreporter.js", + "test/browser/common.js", + "test/browser/less.js" ], - template: 'test/browser/test-runner-template.tmpl' + template: "test/browser/test-runner-template.tmpl" }, main: { // src is used to build list of less files to compile src: [ - 'test/less/*.less', - '!test/less/plugin-preeval.less', // uses ES6 syntax + "test/less/*.less", + "!test/less/plugin-preeval.less", // uses ES6 syntax // Don't test NPM import, obviously - '!test/less/plugin-module.less', - '!test/less/import-module.less', - '!test/less/javascript.less', - '!test/less/urls.less', - '!test/less/empty.less' + "!test/less/plugin-module.less", + "!test/less/import-module.less", + "!test/less/javascript.less", + "!test/less/urls.less", + "!test/less/empty.less" ], options: { - helpers: 'test/browser/runner-main-options.js', - specs: 'test/browser/runner-main-spec.js', - outfile: 'tmp/browser/test-runner-main.html' + helpers: "test/browser/runner-main-options.js", + specs: "test/browser/runner-main-spec.js", + outfile: "tmp/browser/test-runner-main.html" } }, legacy: { - src: ['test/less/legacy/*.less'], + src: ["test/less/legacy/*.less"], options: { - helpers: 'test/browser/runner-legacy-options.js', - specs: 'test/browser/runner-legacy-spec.js', - outfile: 'tmp/browser/test-runner-legacy.html' + helpers: "test/browser/runner-legacy-options.js", + specs: "test/browser/runner-legacy-spec.js", + outfile: "tmp/browser/test-runner-legacy.html" } }, strictUnits: { - src: ['test/less/strict-units/*.less'], + src: ["test/less/strict-units/*.less"], options: { - helpers: 'test/browser/runner-strict-units-options.js', - specs: 'test/browser/runner-strict-units-spec.js', - outfile: 'tmp/browser/test-runner-strict-units.html' + helpers: "test/browser/runner-strict-units-options.js", + specs: "test/browser/runner-strict-units-spec.js", + outfile: "tmp/browser/test-runner-strict-units.html" } }, errors: { - src: ['test/less/errors/*.less', '!test/less/errors/javascript-error.less', 'test/browser/less/errors/*.less'], + src: [ + "test/less/errors/*.less", + "!test/less/errors/javascript-error.less", + "test/browser/less/errors/*.less" + ], options: { timeout: 20000, - helpers: 'test/browser/runner-errors-options.js', - specs: 'test/browser/runner-errors-spec.js', - outfile: 'tmp/browser/test-runner-errors.html' + helpers: "test/browser/runner-errors-options.js", + specs: "test/browser/runner-errors-spec.js", + outfile: "tmp/browser/test-runner-errors.html" } }, noJsErrors: { - src: ['test/less/no-js-errors/*.less'], + src: ["test/less/no-js-errors/*.less"], options: { - helpers: 'test/browser/runner-no-js-errors-options.js', - specs: 'test/browser/runner-no-js-errors-spec.js', - outfile: 'tmp/browser/test-runner-no-js-errors.html' + helpers: "test/browser/runner-no-js-errors-options.js", + specs: "test/browser/runner-no-js-errors-spec.js", + outfile: "tmp/browser/test-runner-no-js-errors.html" } }, browser: { - src: ['test/browser/less/*.less', 'test/browser/less/plugin/*.less'], + src: [ + "test/browser/less/*.less", + "test/browser/less/plugin/*.less" + ], options: { - helpers: 'test/browser/runner-browser-options.js', - specs: 'test/browser/runner-browser-spec.js', - outfile: 'tmp/browser/test-runner-browser.html' + helpers: "test/browser/runner-browser-options.js", + specs: "test/browser/runner-browser-spec.js", + outfile: "tmp/browser/test-runner-browser.html" } }, relativeUrls: { - src: ['test/browser/less/relative-urls/*.less'], + src: ["test/browser/less/relative-urls/*.less"], options: { - helpers: 'test/browser/runner-relative-urls-options.js', - specs: 'test/browser/runner-relative-urls-spec.js', - outfile: 'tmp/browser/test-runner-relative-urls.html' + helpers: "test/browser/runner-relative-urls-options.js", + specs: "test/browser/runner-relative-urls-spec.js", + outfile: "tmp/browser/test-runner-relative-urls.html" } }, rewriteUrls: { - src: ['test/browser/less/rewrite-urls/*.less'], + src: ["test/browser/less/rewrite-urls/*.less"], options: { - helpers: 'test/browser/runner-rewrite-urls-options.js', - specs: 'test/browser/runner-rewrite-urls-spec.js', - outfile: 'tmp/browser/test-runner-rewrite-urls.html' + helpers: "test/browser/runner-rewrite-urls-options.js", + specs: "test/browser/runner-rewrite-urls-spec.js", + outfile: "tmp/browser/test-runner-rewrite-urls.html" } }, rootpath: { - src: ['test/browser/less/rootpath/*.less'], + src: ["test/browser/less/rootpath/*.less"], options: { - helpers: 'test/browser/runner-rootpath-options.js', - specs: 'test/browser/runner-rootpath-spec.js', - outfile: 'tmp/browser/test-runner-rootpath.html' + helpers: "test/browser/runner-rootpath-options.js", + specs: "test/browser/runner-rootpath-spec.js", + outfile: "tmp/browser/test-runner-rootpath.html" } }, rootpathRelative: { - src: ['test/browser/less/rootpath-relative/*.less'], + src: ["test/browser/less/rootpath-relative/*.less"], options: { - helpers: 'test/browser/runner-rootpath-relative-options.js', - specs: 'test/browser/runner-rootpath-relative-spec.js', - outfile: 'tmp/browser/test-runner-rootpath-relative.html' + helpers: "test/browser/runner-rootpath-relative-options.js", + specs: "test/browser/runner-rootpath-relative-spec.js", + outfile: "tmp/browser/test-runner-rootpath-relative.html" } }, rootpathRewriteUrls: { - src: ['test/browser/less/rootpath-rewrite-urls/*.less'], + src: ["test/browser/less/rootpath-rewrite-urls/*.less"], options: { - helpers: 'test/browser/runner-rootpath-rewrite-urls-options.js', - specs: 'test/browser/runner-rootpath-rewrite-urls-spec.js', - outfile: 'tmp/browser/test-runner-rootpath-rewrite-urls.html' + helpers: + "test/browser/runner-rootpath-rewrite-urls-options.js", + specs: "test/browser/runner-rootpath-rewrite-urls-spec.js", + outfile: + "tmp/browser/test-runner-rootpath-rewrite-urls.html" } }, production: { - src: ['test/browser/less/production/*.less'], + src: ["test/browser/less/production/*.less"], options: { - helpers: 'test/browser/runner-production-options.js', - specs: 'test/browser/runner-production-spec.js', - outfile: 'tmp/browser/test-runner-production.html' + helpers: "test/browser/runner-production-options.js", + specs: "test/browser/runner-production-spec.js", + outfile: "tmp/browser/test-runner-production.html" } }, modifyVars: { - src: ['test/browser/less/modify-vars/*.less'], + src: ["test/browser/less/modify-vars/*.less"], options: { - helpers: 'test/browser/runner-modify-vars-options.js', - specs: 'test/browser/runner-modify-vars-spec.js', - outfile: 'tmp/browser/test-runner-modify-vars.html' + helpers: "test/browser/runner-modify-vars-options.js", + specs: "test/browser/runner-modify-vars-spec.js", + outfile: "tmp/browser/test-runner-modify-vars.html" } }, globalVars: { - src: ['test/browser/less/global-vars/*.less'], + src: ["test/browser/less/global-vars/*.less"], options: { - helpers: 'test/browser/runner-global-vars-options.js', - specs: 'test/browser/runner-global-vars-spec.js', - outfile: 'tmp/browser/test-runner-global-vars.html' + helpers: "test/browser/runner-global-vars-options.js", + specs: "test/browser/runner-global-vars-spec.js", + outfile: "tmp/browser/test-runner-global-vars.html" } }, postProcessorPlugin: { - src: ['test/less/postProcessorPlugin/*.less'], + src: ["test/less/postProcessorPlugin/*.less"], options: { - helpers: ['test/plugins/postprocess/index.js','test/browser/runner-postProcessorPlugin-options.js'], - specs: 'test/browser/runner-postProcessorPlugin.js', - outfile: 'tmp/browser/test-runner-post-processor-plugin.html' + helpers: [ + "test/plugins/postprocess/index.js", + "test/browser/runner-postProcessorPlugin-options.js" + ], + specs: "test/browser/runner-postProcessorPlugin.js", + outfile: + "tmp/browser/test-runner-post-processor-plugin.html" } }, preProcessorPlugin: { - src: ['test/less/preProcessorPlugin/*.less'], + src: ["test/less/preProcessorPlugin/*.less"], options: { - helpers: ['test/plugins/preprocess/index.js','test/browser/runner-preProcessorPlugin-options.js'], - specs: 'test/browser/runner-preProcessorPlugin.js', - outfile: 'tmp/browser/test-runner-pre-processor-plugin.html' + helpers: [ + "test/plugins/preprocess/index.js", + "test/browser/runner-preProcessorPlugin-options.js" + ], + specs: "test/browser/runner-preProcessorPlugin.js", + outfile: "tmp/browser/test-runner-pre-processor-plugin.html" } }, visitorPlugin: { - src: ['test/less/visitorPlugin/*.less'], + src: ["test/less/visitorPlugin/*.less"], options: { - helpers: ['test/plugins/visitor/index.js','test/browser/runner-VisitorPlugin-options.js'], - specs: 'test/browser/runner-VisitorPlugin.js', - outfile: 'tmp/browser/test-runner-visitor-plugin.html' + helpers: [ + "test/plugins/visitor/index.js", + "test/browser/runner-VisitorPlugin-options.js" + ], + specs: "test/browser/runner-VisitorPlugin.js", + outfile: "tmp/browser/test-runner-visitor-plugin.html" } }, filemanagerPlugin: { - src: ['test/less/filemanagerPlugin/*.less'], + src: ["test/less/filemanagerPlugin/*.less"], options: { - helpers: ['test/plugins/filemanager/index.js','test/browser/runner-filemanagerPlugin-options.js'], - specs: 'test/browser/runner-filemanagerPlugin.js', - outfile: 'tmp/browser/test-runner-filemanager-plugin.html' + helpers: [ + "test/plugins/filemanager/index.js", + "test/browser/runner-filemanagerPlugin-options.js" + ], + specs: "test/browser/runner-filemanagerPlugin.js", + outfile: "tmp/browser/test-runner-filemanager-plugin.html" } } }, - 'saucelabs-jasmine': sauceJobs, - + "saucelabs-jasmine": sauceJobs, // Clean the version of less built for the tests clean: { - test: ['test/browser/less.js', 'tmp', 'test/less-bom'], - 'sourcemap-test': ['test/sourcemaps/*.css', 'test/sourcemaps/*.map'], - sauce_log: ['sc_*.log'] + test: ["test/browser/less.js", "tmp", "test/less-bom"], + "sourcemap-test": [ + "test/sourcemaps/*.css", + "test/sourcemaps/*.map" + ], + sauce_log: ["sc_*.log"] } }); // Load these plugins to provide the necessary tasks - grunt.loadNpmTasks('grunt-saucelabs'); + grunt.loadNpmTasks("grunt-saucelabs"); - require('jit-grunt')(grunt); + require("jit-grunt")(grunt); // by default, run tests - grunt.registerTask('default', [ - 'test' - ]); + grunt.registerTask("default", ["test"]); // Release - grunt.registerTask('dist', [ - 'browserify:browser', - 'concat:dist', - 'uglify:dist' + grunt.registerTask("dist", [ + "browserify:browser", + "concat:dist", + "uglify:dist" ]); // Create the browser version of less.js - grunt.registerTask('browsertest-lessjs', [ - 'browserify:browser', - 'uglify:test', - 'concat:browsertest' + grunt.registerTask("browsertest-lessjs", [ + "browserify:browser", + "uglify:test", + "concat:browsertest" ]); // Run all browser tests - grunt.registerTask('browsertest', [ - 'browsertest-lessjs', - 'connect', - 'jasmine' + grunt.registerTask("browsertest", [ + "browsertest-lessjs", + "connect", + "jasmine" ]); // setup a web server to run the browser tests in a browser rather than phantom - grunt.registerTask('browsertest-server', [ - 'browsertest-lessjs', - 'jasmine::build', - 'connect::keepalive' + grunt.registerTask("browsertest-server", [ + "browsertest-lessjs", + "jasmine::build", + "connect::keepalive" ]); - var previous_force_state = grunt.option('force'); + var previous_force_state = grunt.option("force"); - grunt.registerTask('force',function(set) { - if (set === 'on') { - grunt.option('force',true); - } - else if (set === 'off') { - grunt.option('force',false); - } - else if (set === 'restore') { - grunt.option('force',previous_force_state); + grunt.registerTask("force", function(set) { + if (set === "on") { + grunt.option("force", true); + } else if (set === "off") { + grunt.option("force", false); + } else if (set === "restore") { + grunt.option("force", previous_force_state); } }); - grunt.registerTask('sauce', [ - 'browsertest-lessjs', - 'jasmine::build', - 'connect', - 'sauce-after-setup' + grunt.registerTask("sauce", [ + "browsertest-lessjs", + "jasmine::build", + "connect", + "sauce-after-setup" ]); - grunt.registerTask('sauce-after-setup', [ - 'saucelabs-jasmine:all', - 'clean:sauce_log' + grunt.registerTask("sauce-after-setup", [ + "saucelabs-jasmine:all", + "clean:sauce_log" ]); var testTasks = [ - 'clean', - 'eslint', - 'shell:test', - 'shell:opts', - 'shell:plugin', - 'browsertest' + "clean", + "eslint", + "shell:test", + "shell:opts", + "shell:plugin", + "browsertest" ]; - if (isNaN(Number(process.env.TRAVIS_PULL_REQUEST, 10)) && + if ( + isNaN(Number(process.env.TRAVIS_PULL_REQUEST, 10)) && Number(process.env.TRAVIS_NODE_VERSION) === 4 && - (process.env.TRAVIS_BRANCH === 'master' || process.env.TRAVIS_BRANCH === '3.x')) { - testTasks.push('force:on'); - testTasks.push('sauce-after-setup'); - testTasks.push('force:off'); + (process.env.TRAVIS_BRANCH === "master" || + process.env.TRAVIS_BRANCH === "3.x") + ) { + testTasks.push("force:on"); + testTasks.push("sauce-after-setup"); + testTasks.push("force:off"); } // Run all tests - grunt.registerTask('test', testTasks); + grunt.registerTask("test", testTasks); // Run shell option tests (includes deprecated options) - grunt.registerTask('shell-options', ['shell:opts']); + grunt.registerTask("shell-options", ["shell:opts"]); // Run shell plugin test - grunt.registerTask('shell-plugin', ['shell:plugin']); + grunt.registerTask("shell-plugin", ["shell:plugin"]); // Run all tests - grunt.registerTask('quicktest', testTasks.slice(0, -1)); + grunt.registerTask("quicktest", testTasks.slice(0, -1)); // generate a good test environment for testing sourcemaps - grunt.registerTask('sourcemap-test', [ - 'clean:sourcemap-test', - 'shell:sourcemap-test', - 'connect::keepalive' + grunt.registerTask("sourcemap-test", [ + "clean:sourcemap-test", + "shell:sourcemap-test", + "connect::keepalive" ]); // Run benchmark - grunt.registerTask('benchmark', [ - 'shell:benchmark' - ]); + grunt.registerTask("benchmark", ["shell:benchmark"]); + grunt.registerTask("rollup", [ + "rollup:browser", + "rollup:node" + ]); }; diff --git a/lebab-convert.js b/lebab-convert.js new file mode 100644 index 000000000..ee56b9266 --- /dev/null +++ b/lebab-convert.js @@ -0,0 +1,33 @@ +const transform = require("lebab").transform; +const readGlob = require("read-glob"); +const fs = require("fs"); +const path = require("path"); + +readGlob("lib/**/*.js").subscribe({ + next(result) { + if (result.path.indexOf("source-map/") === -1) { + try { + const { code, warnings } = transform( + result.contents.toString(), + [ + "arrow", + "arrow-return", + "arg-rest", + "arg-spread", + "obj-shorthand", + "multi-var", + "let", + "class", + "commonjs", + "template", + "default-param" + ] + ); + + fs.writeFileSync(path.join(result.cwd, result.path), code); + } catch (e) { + console.error(e); + } + } + } +}); diff --git a/lib/less-browser/add-default-options.js b/lib/less-browser/add-default-options.js index 981e0e4e5..d839595f9 100644 --- a/lib/less-browser/add-default-options.js +++ b/lib/less-browser/add-default-options.js @@ -1,7 +1,7 @@ -var addDataAttr = require('./utils').addDataAttr, - browser = require('./browser'); +import {addDataAttr} from './utils'; +import browser from './browser'; -module.exports = function(window, options) { +export default (window, options) => { // use options from the current script tag data attribues addDataAttr(options, browser.currentScript(window)); @@ -30,7 +30,7 @@ module.exports = function(window, options) { options.isFileProtocol ? 'development' : 'production'); - var dumpLineNumbers = /!dumpLineNumbers:(comments|mediaquery|all)/.exec(window.location.hash); + const dumpLineNumbers = /!dumpLineNumbers:(comments|mediaquery|all)/.exec(window.location.hash); if (dumpLineNumbers) { options.dumpLineNumbers = dumpLineNumbers[1]; } diff --git a/lib/less-browser/bootstrap.js b/lib/less-browser/bootstrap.js index cf1ab4757..ccdf6832d 100644 --- a/lib/less-browser/bootstrap.js +++ b/lib/less-browser/bootstrap.js @@ -10,10 +10,10 @@ // Browsers have good Promise support require('promise/polyfill'); -var options = require('../less/default-options')(); +const options = require('../less/default-options')(); if (window.less) { - for (var key in window.less) { + for (const key in window.less) { if (window.less.hasOwnProperty(key)) { options[key] = window.less[key]; } @@ -27,11 +27,13 @@ if (window.LESS_PLUGINS) { options.plugins = options.plugins.concat(window.LESS_PLUGINS); } -var less = module.exports = require('./index')(window, options); +const less = module.exports = require('./index')(window, options); window.less = less; -var css, head, style; +let css; +let head; +let style; // Always restore page visibility function resolveOrReject(data) { diff --git a/lib/less-browser/browser.js b/lib/less-browser/browser.js index defc97728..d8668fb50 100644 --- a/lib/less-browser/browser.js +++ b/lib/less-browser/browser.js @@ -1,18 +1,19 @@ -var utils = require('./utils'); -module.exports = { +import utils from './utils'; + +export default { createCSS: function (document, styles, sheet) { // Strip the query-string - var href = sheet.href || ''; + const href = sheet.href || ''; // If there is no title set, use the filename, minus the extension - var id = 'less:' + (sheet.title || utils.extractId(href)); + const id = `less:${sheet.title || utils.extractId(href)}`; // If this has already been inserted into the DOM, we may need to replace it - var oldStyleNode = document.getElementById(id); - var keepOldStyleNode = false; + const oldStyleNode = document.getElementById(id); + let keepOldStyleNode = false; // Create a new stylesheet node for insertion or (if necessary) replacement - var styleNode = document.createElement('style'); + const styleNode = document.createElement('style'); styleNode.setAttribute('type', 'text/css'); if (sheet.media) { styleNode.setAttribute('media', sheet.media); @@ -27,12 +28,12 @@ module.exports = { oldStyleNode.firstChild.nodeValue === styleNode.firstChild.nodeValue); } - var head = document.getElementsByTagName('head')[0]; + const head = document.getElementsByTagName('head')[0]; // If there is no oldStyleNode, just append; otherwise, only append if we need // to replace oldStyleNode with an updated stylesheet if (oldStyleNode === null || keepOldStyleNode === false) { - var nextEl = sheet && sheet.nextSibling || null; + const nextEl = sheet && sheet.nextSibling || null; if (nextEl) { nextEl.parentNode.insertBefore(styleNode, nextEl); } else { @@ -55,9 +56,9 @@ module.exports = { } }, currentScript: function(window) { - var document = window.document; - return document.currentScript || (function() { - var scripts = document.getElementsByTagName('script'); + const document = window.document; + return document.currentScript || (() => { + const scripts = document.getElementsByTagName('script'); return scripts[scripts.length - 1]; })(); } diff --git a/lib/less-browser/cache.js b/lib/less-browser/cache.js index 827bc2519..5322c17b8 100644 --- a/lib/less-browser/cache.js +++ b/lib/less-browser/cache.js @@ -1,7 +1,7 @@ // Cache system is a bit outdated and could do with work -module.exports = function(window, options, logger) { - var cache = null; +export default (window, options, logger) => { + let cache = null; if (options.env !== 'development') { try { cache = (typeof window.localStorage === 'undefined') ? null : window.localStorage; @@ -10,23 +10,23 @@ module.exports = function(window, options, logger) { return { setCSS: function(path, lastModified, modifyVars, styles) { if (cache) { - logger.info('saving ' + path + ' to cache.'); + logger.info(`saving ${path} to cache.`); try { cache.setItem(path, styles); - cache.setItem(path + ':timestamp', lastModified); + cache.setItem(`${path}:timestamp`, lastModified); if (modifyVars) { - cache.setItem(path + ':vars', JSON.stringify(modifyVars)); + cache.setItem(`${path}:vars`, JSON.stringify(modifyVars)); } } catch (e) { // TODO - could do with adding more robust error handling - logger.error('failed to save "' + path + '" to local storage for caching.'); + logger.error(`failed to save "${path}" to local storage for caching.`); } } }, getCSS: function(path, webInfo, modifyVars) { - var css = cache && cache.getItem(path), - timestamp = cache && cache.getItem(path + ':timestamp'), - vars = cache && cache.getItem(path + ':vars'); + const css = cache && cache.getItem(path); + const timestamp = cache && cache.getItem(`${path}:timestamp`); + let vars = cache && cache.getItem(`${path}:vars`); modifyVars = modifyVars || {}; vars = vars || "{}"; // if not set, treat as the JSON representation of an empty object diff --git a/lib/less-browser/error-reporting.js b/lib/less-browser/error-reporting.js index 65df6ec13..6a0aee673 100644 --- a/lib/less-browser/error-reporting.js +++ b/lib/less-browser/error-reporting.js @@ -1,22 +1,24 @@ -var utils = require('./utils'), - browser = require('./browser'); +import utils from './utils'; +import browser from './browser'; -module.exports = function(window, less, options) { +export default (window, less, options) => { function errorHTML(e, rootHref) { - var id = 'less-error-message:' + utils.extractId(rootHref || ''); - var template = '
  • {content}
    • '; - var elem = window.document.createElement('div'), timer, content, errors = []; - var filename = e.filename || rootHref; - var filenameNoPath = filename.match(/([^\/]+(\?.*)?)$/)[1]; + const id = `less-error-message:${utils.extractId(rootHref || '')}`; + const template = '
  • {content}
    • '; + const elem = window.document.createElement('div'); + let timer; + let content; + const errors = []; + const filename = e.filename || rootHref; + const filenameNoPath = filename.match(/([^\/]+(\?.*)?)$/)[1]; elem.id = id; elem.className = 'less-error-message'; - content = '

    ' + (e.type || 'Syntax') + 'Error: ' + (e.message || 'There is an error in your .less file') + - '

    ' + '

    in ' + filenameNoPath + ' '; + content = `

    ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}

    in ${filenameNoPath} `; - var errorline = function (e, i, classname) { + const errorline = (e, i, classname) => { if (e.extract[i] !== undefined) { errors.push(template.replace(/\{line\}/, (parseInt(e.line, 10) || 0) + (i - 1)) .replace(/\{class\}/, classname) @@ -28,11 +30,10 @@ module.exports = function(window, less, options) { errorline(e, 0, ''); errorline(e, 1, 'line'); errorline(e, 2, ''); - content += 'on line ' + e.line + ', column ' + (e.column + 1) + ':

    ' + - ''; + content += `on line ${e.line}, column ${e.column + 1}:

    `; } if (e.stack && (e.extract || options.logLevel >= 4)) { - content += '
    Stack Trace
    ' + e.stack.split('\n').slice(1).join('
    '); + content += `
    Stack Trace
    ${e.stack.split('\n').slice(1).join('
    ')}`; } elem.innerHTML = content; @@ -89,9 +90,9 @@ module.exports = function(window, less, options) { ].join(';'); if (options.env === 'development') { - timer = setInterval(function () { - var document = window.document, - body = document.body; + timer = setInterval(() => { + const document = window.document; + const body = document.body; if (body) { if (document.getElementById(id)) { body.replaceChild(elem, document.getElementById(id)); @@ -105,7 +106,7 @@ module.exports = function(window, less, options) { } function removeErrorHTML(path) { - var node = window.document.getElementById('less-error-message:' + utils.extractId(path)); + const node = window.document.getElementById(`less-error-message:${utils.extractId(path)}`); if (node) { node.parentNode.removeChild(node); } @@ -126,13 +127,12 @@ module.exports = function(window, less, options) { } function errorConsole(e, rootHref) { - var template = '{line} {content}'; - var filename = e.filename || rootHref; - var errors = []; - var content = (e.type || 'Syntax') + 'Error: ' + (e.message || 'There is an error in your .less file') + - ' in ' + filename; + const template = '{line} {content}'; + const filename = e.filename || rootHref; + const errors = []; + let content = `${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'} in ${filename}`; - var errorline = function (e, i, classname) { + const errorline = (e, i, classname) => { if (e.extract[i] !== undefined) { errors.push(template.replace(/\{line\}/, (parseInt(e.line, 10) || 0) + (i - 1)) .replace(/\{class\}/, classname) @@ -144,11 +144,10 @@ module.exports = function(window, less, options) { errorline(e, 0, ''); errorline(e, 1, 'line'); errorline(e, 2, ''); - content += ' on line ' + e.line + ', column ' + (e.column + 1) + ':\n' + - errors.join('\n'); + content += ` on line ${e.line}, column ${e.column + 1}:\n${errors.join('\n')}`; } if (e.stack && (e.extract || options.logLevel >= 4)) { - content += '\nStack Trace\n' + e.stack; + content += `\nStack Trace\n${e.stack}`; } less.logger.error(content); } diff --git a/lib/less-browser/file-manager.js b/lib/less-browser/file-manager.js index b59e0a402..64b2b20ee 100644 --- a/lib/less-browser/file-manager.js +++ b/lib/less-browser/file-manager.js @@ -1,13 +1,13 @@ /* global window, XMLHttpRequest */ -module.exports = function(options, logger) { +export default (options, logger) => { - var AbstractFileManager = require('../less/environment/abstract-file-manager.js'); + const AbstractFileManager = require('../less/environment/abstract-file-manager.js'); - var fileCache = {}; + let fileCache = {}; // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load - var FileManager = function() { + const FileManager = () => { }; FileManager.prototype = new AbstractFileManager(); @@ -23,13 +23,13 @@ module.exports = function(options, logger) { }; FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) { - var xhr = new XMLHttpRequest(); - var async = options.isFileProtocol ? options.fileAsync : true; + const xhr = new XMLHttpRequest(); + const async = options.isFileProtocol ? options.fileAsync : true; if (typeof xhr.overrideMimeType === 'function') { xhr.overrideMimeType('text/css'); } - logger.debug('XHR: Getting \'' + url + '\''); + logger.debug(`XHR: Getting '${url}'`); xhr.open('GET', url, async); xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5'); xhr.send(null); @@ -50,7 +50,7 @@ module.exports = function(options, logger) { errback(xhr.status, url); } } else if (async) { - xhr.onreadystatechange = function () { + xhr.onreadystatechange = () => { if (xhr.readyState == 4) { handleResponse(xhr, callback, errback); } @@ -59,11 +59,9 @@ module.exports = function(options, logger) { handleResponse(xhr, callback, errback); } }; - FileManager.prototype.supports = function(filename, currentDirectory, options, environment) { - return true; - }; + FileManager.prototype.supports = (filename, currentDirectory, options, environment) => true; - FileManager.prototype.clearFileCache = function() { + FileManager.prototype.clearFileCache = () => { fileCache = {}; }; @@ -81,17 +79,17 @@ module.exports = function(options, logger) { // sheet may be set to the stylesheet for the initial load or a collection of properties including // some context variables for imports - var hrefParts = this.extractUrlParts(filename, window.location.href); - var href = hrefParts.url; - var self = this; + const hrefParts = this.extractUrlParts(filename, window.location.href); + const href = hrefParts.url; + const self = this; - return new Promise(function(resolve, reject) { + return new Promise((resolve, reject) => { if (options.useFileCache && fileCache[href]) { try { - var lessText = fileCache[href]; + const lessText = fileCache[href]; return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }}); } catch (e) { - return reject({ filename: href, message: 'Error loading file ' + href + ' error was ' + e.message }); + return reject({ filename: href, message: `Error loading file ${href} error was ${e.message}` }); } } @@ -100,9 +98,9 @@ module.exports = function(options, logger) { fileCache[href] = data; // Use remote copy (re-parse) - resolve({ contents: data, filename: href, webInfo: { lastModified: lastModified }}); + resolve({ contents: data, filename: href, webInfo: { lastModified }}); }, function doXHRError(status, url) { - reject({ type: 'File', message: '\'' + url + '\' wasn\'t found (' + status + ')', href: href }); + reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href }); }); }); }; diff --git a/lib/less-browser/image-size.js b/lib/less-browser/image-size.js index 439336c19..540c3fa04 100644 --- a/lib/less-browser/image-size.js +++ b/lib/less-browser/image-size.js @@ -1,6 +1,6 @@ -module.exports = function() { +export default () => { - var functionRegistry = require('./../less/functions/function-registry'); + const functionRegistry = require('./../less/functions/function-registry'); function imageSize() { throw { @@ -9,7 +9,7 @@ module.exports = function() { }; } - var imageFunctions = { + const imageFunctions = { 'image-size': function(filePathNode) { imageSize(this, filePathNode); return -1; diff --git a/lib/less-browser/index.js b/lib/less-browser/index.js index 654072c8b..a86e2a01d 100644 --- a/lib/less-browser/index.js +++ b/lib/less-browser/index.js @@ -2,24 +2,25 @@ // index.js // Should expose the additional browser functions on to the less object // -var addDataAttr = require('./utils').addDataAttr, - browser = require('./browser'); +import {addDataAttr} from './utils'; + +import browser from './browser'; + +export default (window, options) => { + const document = window.document; + const less = require('../less')(); -module.exports = function(window, options) { - var document = window.document; - var less = require('../less')(); - less.options = options; - var environment = less.environment, - FileManager = require('./file-manager')(options, less.logger), - fileManager = new FileManager(); + const environment = less.environment; + const FileManager = require('./file-manager')(options, less.logger); + const fileManager = new FileManager(); environment.addFileManager(fileManager); less.FileManager = FileManager; less.PluginLoader = require('./plugin-loader'); require('./log-listener')(less, options); - var errors = require('./error-reporting')(window, less, options); - var cache = less.cache = options.cache || require('./cache')(window, options, less.logger); + const errors = require('./error-reporting')(window, less, options); + const cache = less.cache = options.cache || require('./cache')(window, options, less.logger); require('./image-size')(less.environment); // Setup user functions - Deprecate? @@ -27,11 +28,11 @@ module.exports = function(window, options) { less.functions.functionRegistry.addMultiple(options.functions); } - var typePattern = /^text\/(x-)?less$/; + const typePattern = /^text\/(x-)?less$/; function clone(obj) { - var cloned = {}; - for (var prop in obj) { + const cloned = {}; + for (const prop in obj) { if (obj.hasOwnProperty(prop)) { cloned[prop] = obj[prop]; } @@ -41,29 +42,29 @@ module.exports = function(window, options) { // only really needed for phantom function bind(func, thisArg) { - var curryArgs = Array.prototype.slice.call(arguments, 2); + const curryArgs = Array.prototype.slice.call(arguments, 2); return function() { - var args = curryArgs.concat(Array.prototype.slice.call(arguments, 0)); + const args = curryArgs.concat(Array.prototype.slice.call(arguments, 0)); return func.apply(thisArg, args); }; } function loadStyles(modifyVars) { - var styles = document.getElementsByTagName('style'), - style; + const styles = document.getElementsByTagName('style'); + let style; - for (var i = 0; i < styles.length; i++) { + for (let i = 0; i < styles.length; i++) { style = styles[i]; if (style.type.match(typePattern)) { - var instanceOptions = clone(options); + const instanceOptions = clone(options); instanceOptions.modifyVars = modifyVars; - var lessText = style.innerHTML || ''; + const lessText = style.innerHTML || ''; instanceOptions.filename = document.location.href.replace(/#.*$/, ''); /* jshint loopfunc:true */ // use closure to store current style less.render(lessText, instanceOptions, - bind(function(style, e, result) { + bind((style, e, result) => { if (e) { errors.add(e, 'inline'); } else { @@ -81,7 +82,7 @@ module.exports = function(window, options) { function loadStyleSheet(sheet, callback, reload, remaining, modifyVars) { - var instanceOptions = clone(options); + const instanceOptions = clone(options); addDataAttr(instanceOptions, sheet); instanceOptions.mime = sheet.type; @@ -90,12 +91,11 @@ module.exports = function(window, options) { } function loadInitialFileCallback(loadedFile) { + const data = loadedFile.contents; + const path = loadedFile.filename; + const webInfo = loadedFile.webInfo; - var data = loadedFile.contents, - path = loadedFile.filename, - webInfo = loadedFile.webInfo; - - var newFileInfo = { + const newFileInfo = { currentDirectory: fileManager.getPath(path), filename: path, rootFilename: path, @@ -108,7 +108,7 @@ module.exports = function(window, options) { if (webInfo) { webInfo.remaining = remaining; - var css = cache.getCSS(path, webInfo, instanceOptions.modifyVars); + const css = cache.getCSS(path, webInfo, instanceOptions.modifyVars); if (!reload && css) { webInfo.local = true; callback(null, css, data, sheet, webInfo, path); @@ -121,7 +121,7 @@ module.exports = function(window, options) { errors.remove(path); instanceOptions.rootFileInfo = newFileInfo; - less.render(data, instanceOptions, function(e, result) { + less.render(data, instanceOptions, (e, result) => { if (e) { e.href = path; callback(e); @@ -133,9 +133,9 @@ module.exports = function(window, options) { } fileManager.loadFile(sheet.href, null, instanceOptions, environment) - .then(function(loadedFile) { + .then(loadedFile => { loadInitialFileCallback(loadedFile); - }).catch(function(err) { + }).catch(err => { console.log(err); callback(err); }); @@ -143,17 +143,17 @@ module.exports = function(window, options) { } function loadStyleSheets(callback, reload, modifyVars) { - for (var i = 0; i < less.sheets.length; i++) { + for (let i = 0; i < less.sheets.length; i++) { loadStyleSheet(less.sheets[i], callback, reload, less.sheets.length - (i + 1), modifyVars); } } function initRunningMode() { if (less.env === 'development') { - less.watchTimer = setInterval(function () { + less.watchTimer = setInterval(() => { if (less.watchMode) { fileManager.clearFileCache(); - loadStyleSheets(function (e, css, _, sheet, webInfo) { + loadStyleSheets((e, css, _, sheet, webInfo) => { if (e) { errors.add(e, e.href || sheet.href); } else if (css) { @@ -183,11 +183,11 @@ module.exports = function(window, options) { // Synchronously get all tags with the 'rel' attribute set to // "stylesheet/less". // - less.registerStylesheetsImmediately = function() { - var links = document.getElementsByTagName('link'); + less.registerStylesheetsImmediately = () => { + const links = document.getElementsByTagName('link'); less.sheets = []; - for (var i = 0; i < links.length; i++) { + for (let i = 0; i < links.length; i++) { if (links[i].rel === 'stylesheet/less' || (links[i].rel.match(/stylesheet/) && (links[i].type.match(typePattern)))) { less.sheets.push(links[i]); @@ -199,27 +199,26 @@ module.exports = function(window, options) { // Asynchronously get all tags with the 'rel' attribute set to // "stylesheet/less", returning a Promise. // - less.registerStylesheets = function() { - return new Promise(function(resolve, reject) { - less.registerStylesheetsImmediately(); - resolve(); - }); - }; + less.registerStylesheets = () => new Promise((resolve, reject) => { + less.registerStylesheetsImmediately(); + resolve(); + }); // // With this function, it's possible to alter variables and re-render // CSS without reloading less-files // - less.modifyVars = function(record) { - return less.refresh(true, record, false); - }; + less.modifyVars = record => less.refresh(true, record, false); - less.refresh = function (reload, modifyVars, clearFileCache) { + less.refresh = (reload, modifyVars, clearFileCache) => { if ((reload || clearFileCache) && clearFileCache !== false) { fileManager.clearFileCache(); } - return new Promise(function (resolve, reject) { - var startTime, endTime, totalMilliseconds, remainingSheets; + return new Promise((resolve, reject) => { + let startTime; + let endTime; + let totalMilliseconds; + let remainingSheets; startTime = endTime = new Date(); // Set counter for remaining unprocessed sheets @@ -231,27 +230,27 @@ module.exports = function(window, options) { totalMilliseconds = endTime - startTime; less.logger.info('Less has finished and no sheets were loaded.'); resolve({ - startTime: startTime, - endTime: endTime, - totalMilliseconds: totalMilliseconds, + startTime, + endTime, + totalMilliseconds, sheets: less.sheets.length }); } else { // Relies on less.sheets array, callback seems to be guaranteed to be called for every element of the array - loadStyleSheets(function (e, css, _, sheet, webInfo) { + loadStyleSheets((e, css, _, sheet, webInfo) => { if (e) { errors.add(e, e.href || sheet.href); reject(e); return; } if (webInfo.local) { - less.logger.info('Loading ' + sheet.href + ' from cache.'); + less.logger.info(`Loading ${sheet.href} from cache.`); } else { - less.logger.info('Rendered ' + sheet.href + ' successfully.'); + less.logger.info(`Rendered ${sheet.href} successfully.`); } browser.createCSS(window.document, css, sheet); - less.logger.info('CSS for ' + sheet.href + ' generated in ' + (new Date() - endTime) + 'ms'); + less.logger.info(`CSS for ${sheet.href} generated in ${new Date() - endTime}ms`); // Count completed sheet remainingSheets--; @@ -259,11 +258,11 @@ module.exports = function(window, options) { // Check if the last remaining sheet was processed and then call the promise if (remainingSheets === 0) { totalMilliseconds = new Date() - startTime; - less.logger.info('Less has finished. CSS generated in ' + totalMilliseconds + 'ms'); + less.logger.info(`Less has finished. CSS generated in ${totalMilliseconds}ms`); resolve({ - startTime: startTime, - endTime: endTime, - totalMilliseconds: totalMilliseconds, + startTime, + endTime, + totalMilliseconds, sheets: less.sheets.length }); } diff --git a/lib/less-browser/log-listener.js b/lib/less-browser/log-listener.js index a145392a5..553da8951 100644 --- a/lib/less-browser/log-listener.js +++ b/lib/less-browser/log-listener.js @@ -1,9 +1,8 @@ -module.exports = function(less, options) { - - var logLevel_debug = 4, - logLevel_info = 3, - logLevel_warn = 2, - logLevel_error = 1; +export default (less, options) => { + const logLevel_debug = 4; + const logLevel_info = 3; + const logLevel_warn = 2; + const logLevel_error = 1; // The amount of logging in the javascript console. // 3 - Debug, information and errors @@ -37,7 +36,7 @@ module.exports = function(less, options) { } }]; } - for (var i = 0; i < options.loggers.length; i++) { + for (let i = 0; i < options.loggers.length; i++) { less.logger.addListener(options.loggers[i]); } }; diff --git a/lib/less-browser/plugin-loader.js b/lib/less-browser/plugin-loader.js index 3fabd5a05..8335db3ab 100644 --- a/lib/less-browser/plugin-loader.js +++ b/lib/less-browser/plugin-loader.js @@ -1,24 +1,24 @@ // TODO: Add tests for browser @plugin /* global window */ -var AbstractPluginLoader = require('../less/environment/abstract-plugin-loader.js'); +import AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js'; /** * Browser Plugin Loader */ -var PluginLoader = function(less) { - this.less = less; - // Should we shim this.require for browser? Probably not? -}; +class PluginLoader extends AbstractPluginLoader { + constructor(less) { + this.less = less; + // Should we shim this.require for browser? Probably not? + } -PluginLoader.prototype = new AbstractPluginLoader(); + loadPlugin(filename, basePath, context, environment, fileManager) { + return new Promise((fulfill, reject) => { + fileManager.loadFile(filename, basePath, context, environment) + .then(fulfill).catch(reject); + }); + } +} -PluginLoader.prototype.loadPlugin = function(filename, basePath, context, environment, fileManager) { - return new Promise(function(fulfill, reject) { - fileManager.loadFile(filename, basePath, context, environment) - .then(fulfill).catch(reject); - }); -}; - -module.exports = PluginLoader; +export default PluginLoader; diff --git a/lib/less-browser/utils.js b/lib/less-browser/utils.js index 80e73233b..edc88bcc7 100644 --- a/lib/less-browser/utils.js +++ b/lib/less-browser/utils.js @@ -1,4 +1,4 @@ -module.exports = { +export default { extractId: function(href) { return href.replace(/^[a-z-]+:\/+?[^\/]+/, '') // Remove protocol & domain .replace(/[\?\&]livereload=\w+/, '') // Remove LiveReload cachebuster @@ -8,7 +8,7 @@ module.exports = { .replace(/\./g, ':'); // Replace dots with colons(for valid id) }, addDataAttr: function(options, tag) { - for (var opt in tag.dataset) { + for (const opt in tag.dataset) { if (tag.dataset.hasOwnProperty(opt)) { if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') { options[opt] = tag.dataset[opt]; diff --git a/lib/less-node/environment.js b/lib/less-node/environment.js index c3eae6a05..a9b790c9b 100644 --- a/lib/less-node/environment.js +++ b/lib/less-node/environment.js @@ -1,7 +1,7 @@ -module.exports = { +export default { encodeBase64: function encodeBase64(str) { // Avoid Buffer constructor on newer versions of Node.js. - var buffer = (Buffer.from ? Buffer.from(str) : (new Buffer(str))); + const buffer = (Buffer.from ? Buffer.from(str) : (new Buffer(str))); return buffer.toString('base64'); }, mimeLookup: function (filename) { diff --git a/lib/less-node/file-manager.js b/lib/less-node/file-manager.js index 7bec25d04..92fa63664 100644 --- a/lib/less-node/file-manager.js +++ b/lib/less-node/file-manager.js @@ -1,176 +1,176 @@ -var path = require('path'), - fs = require('./fs'), - PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise, - AbstractFileManager = require('../less/environment/abstract-file-manager.js'); - -var FileManager = function() { - this.contents = {}; -}; - -FileManager.prototype = new AbstractFileManager(); +import path from 'path'; +import fs from './fs'; +const PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; +import AbstractFileManager from '../less/environment/abstract-file-manager.js'; + +class FileManager extends AbstractFileManager { + constructor() { + this.contents = {}; + } -FileManager.prototype.supports = function(filename, currentDirectory, options, environment) { - return true; -}; -FileManager.prototype.supportsSync = function(filename, currentDirectory, options, environment) { - return true; -}; + supports(filename, currentDirectory, options, environment) { + return true; + } -FileManager.prototype.loadFile = function(filename, currentDirectory, options, environment, callback) { + supportsSync(filename, currentDirectory, options, environment) { + return true; + } - var fullFilename, - isAbsoluteFilename = this.isPathAbsolute(filename), - filenamesTried = [], - self = this, - prefix = filename.slice(0, 1), - explicit = prefix === '.' || prefix === '/', - result = null, - isNodeModule = false, - npmPrefix = 'npm://'; + loadFile(filename, currentDirectory, options, environment, callback) { + let fullFilename; + const isAbsoluteFilename = this.isPathAbsolute(filename); + const filenamesTried = []; + const self = this; + const prefix = filename.slice(0, 1); + const explicit = prefix === '.' || prefix === '/'; + let result = null; + let isNodeModule = false; + const npmPrefix = 'npm://'; - options = options || {}; + options = options || {}; - var paths = isAbsoluteFilename ? [''] : [currentDirectory]; + const paths = isAbsoluteFilename ? [''] : [currentDirectory]; - if (options.paths) { paths.push.apply(paths, options.paths); } + if (options.paths) { paths.push(...options.paths); } - if (!isAbsoluteFilename && paths.indexOf('.') === -1) { paths.push('.'); } + if (!isAbsoluteFilename && paths.indexOf('.') === -1) { paths.push('.'); } - var prefixes = options.prefixes || ['']; - var fileParts = this.extractUrlParts(filename); + const prefixes = options.prefixes || ['']; + const fileParts = this.extractUrlParts(filename); - if (options.syncImport) { - getFileData(returnData, returnData); - if (callback) { - callback(result.error, result); + if (options.syncImport) { + getFileData(returnData, returnData); + if (callback) { + callback(result.error, result); + } + else { + return result; + } } else { - return result; + // promise is guaranteed to be asyncronous + // which helps as it allows the file handle + // to be closed before it continues with the next file + return new PromiseConstructor(getFileData); } - } - else { - // promise is guaranteed to be asyncronous - // which helps as it allows the file handle - // to be closed before it continues with the next file - return new PromiseConstructor(getFileData); - } - function returnData(data) { - if (!data.filename) { - result = { error: data }; - } - else { - result = data; + function returnData(data) { + if (!data.filename) { + result = { error: data }; + } + else { + result = data; + } } - } - - function getFileData(fulfill, reject) { - (function tryPathIndex(i) { - if (i < paths.length) { - (function tryPrefix(j) { - if (j < prefixes.length) { - isNodeModule = false; - fullFilename = fileParts.rawPath + prefixes[j] + fileParts.filename; - if (paths[i]) { - fullFilename = path.join(paths[i], fullFilename); - } + function getFileData(fulfill, reject) { + (function tryPathIndex(i) { + if (i < paths.length) { + (function tryPrefix(j) { + if (j < prefixes.length) { + isNodeModule = false; + fullFilename = fileParts.rawPath + prefixes[j] + fileParts.filename; - if (!explicit && paths[i] === '.') { - try { - fullFilename = require.resolve(fullFilename); - isNodeModule = true; + if (paths[i]) { + fullFilename = path.join(paths[i], fullFilename); } - catch (e) { - filenamesTried.push(npmPrefix + fullFilename); - tryWithExtension(); - } - } - else { - tryWithExtension(); - } - - function tryWithExtension() { - var extFilename = options.ext ? self.tryAppendExtension(fullFilename, options.ext) : fullFilename; - if (extFilename !== fullFilename && !explicit && paths[i] === '.') { + if (!explicit && paths[i] === '.') { try { - fullFilename = require.resolve(extFilename); + fullFilename = require.resolve(fullFilename); isNodeModule = true; } catch (e) { - filenamesTried.push(npmPrefix + extFilename); - fullFilename = extFilename; + filenamesTried.push(npmPrefix + fullFilename); + tryWithExtension(); } } else { - fullFilename = extFilename; + tryWithExtension(); } - } - var modified = false; + function tryWithExtension() { + const extFilename = options.ext ? self.tryAppendExtension(fullFilename, options.ext) : fullFilename; - if (self.contents[fullFilename]) { - try { - var stat = fs.statSync.apply(this, [fullFilename]); - if (stat.mtime.getTime() === self.contents[fullFilename].mtime.getTime()) { - fulfill({ contents: self.contents[fullFilename].data, filename: fullFilename}); + if (extFilename !== fullFilename && !explicit && paths[i] === '.') { + try { + fullFilename = require.resolve(extFilename); + isNodeModule = true; + } + catch (e) { + filenamesTried.push(npmPrefix + extFilename); + fullFilename = extFilename; + } } else { - modified = true; + fullFilename = extFilename; } } - catch (e) { - modified = true; - } - } - if (modified || !self.contents[fullFilename]) { - var readFileArgs = [fullFilename]; - if (!options.rawBuffer) { - readFileArgs.push('utf-8'); - } - if (options.syncImport) { + + let modified = false; + + if (self.contents[fullFilename]) { try { - var data = fs.readFileSync.apply(this, readFileArgs); var stat = fs.statSync.apply(this, [fullFilename]); - self.contents[fullFilename] = { data: data, mtime: stat.mtime }; - fulfill({ contents: data, filename: fullFilename}); + if (stat.mtime.getTime() === self.contents[fullFilename].mtime.getTime()) { + fulfill({ contents: self.contents[fullFilename].data, filename: fullFilename}); + } + else { + modified = true; + } } catch (e) { - filenamesTried.push(isNodeModule ? npmPrefix + fullFilename : fullFilename); - return tryPrefix(j + 1); + modified = true; } } - else { - readFileArgs.push(function(e, data) { - if (e) { + if (modified || !self.contents[fullFilename]) { + const readFileArgs = [fullFilename]; + if (!options.rawBuffer) { + readFileArgs.push('utf-8'); + } + if (options.syncImport) { + try { + const data = fs.readFileSync.apply(this, readFileArgs); + var stat = fs.statSync.apply(this, [fullFilename]); + self.contents[fullFilename] = { data, mtime: stat.mtime }; + fulfill({ contents: data, filename: fullFilename}); + } + catch (e) { filenamesTried.push(isNodeModule ? npmPrefix + fullFilename : fullFilename); return tryPrefix(j + 1); } - var stat = fs.statSync.apply(this, [fullFilename]); - self.contents[fullFilename] = { data: data, mtime: stat.mtime }; - fulfill({ contents: data, filename: fullFilename}); - }); - fs.readFile.apply(this, readFileArgs); + } + else { + readFileArgs.push(function(e, data) { + if (e) { + filenamesTried.push(isNodeModule ? npmPrefix + fullFilename : fullFilename); + return tryPrefix(j + 1); + } + const stat = fs.statSync.apply(this, [fullFilename]); + self.contents[fullFilename] = { data, mtime: stat.mtime }; + fulfill({ contents: data, filename: fullFilename}); + }); + fs.readFile.apply(this, readFileArgs); + } + } } - - } - else { - tryPathIndex(i + 1); - } - })(0); - } else { - reject({ type: 'File', message: '\'' + filename + '\' wasn\'t found. Tried - ' + filenamesTried.join(',') }); - } - }(0)); + else { + tryPathIndex(i + 1); + } + })(0); + } else { + reject({ type: 'File', message: `'${filename}' wasn't found. Tried - ${filenamesTried.join(',')}` }); + } + }(0)); + } } -}; -FileManager.prototype.loadFileSync = function(filename, currentDirectory, options, environment) { - options.syncImport = true; - return this.loadFile(filename, currentDirectory, options, environment); -}; + loadFileSync(filename, currentDirectory, options, environment) { + options.syncImport = true; + return this.loadFile(filename, currentDirectory, options, environment); + } +} -module.exports = FileManager; +export default FileManager; diff --git a/lib/less-node/fs.js b/lib/less-node/fs.js index 89986b627..be71f8f2e 100644 --- a/lib/less-node/fs.js +++ b/lib/less-node/fs.js @@ -1,4 +1,4 @@ -var fs; +let fs; try { fs = require('graceful-fs'); @@ -7,4 +7,4 @@ catch (e) { fs = require('fs'); } -module.exports = fs; +export default fs; diff --git a/lib/less-node/image-size.js b/lib/less-node/image-size.js index f80a4546b..4aa770ec1 100644 --- a/lib/less-node/image-size.js +++ b/lib/less-node/image-size.js @@ -1,54 +1,54 @@ -module.exports = function(environment) { - var Dimension = require('../less/tree/dimension'), - Expression = require('../less/tree/expression'), - functionRegistry = require('./../less/functions/function-registry'); +export default environment => { + const Dimension = require('../less/tree/dimension'); + const Expression = require('../less/tree/expression'); + const functionRegistry = require('./../less/functions/function-registry'); function imageSize(functionContext, filePathNode) { - var filePath = filePathNode.value; - var currentFileInfo = functionContext.currentFileInfo; - var currentDirectory = currentFileInfo.rewriteUrls ? + let filePath = filePathNode.value; + const currentFileInfo = functionContext.currentFileInfo; + const currentDirectory = currentFileInfo.rewriteUrls ? currentFileInfo.currentDirectory : currentFileInfo.entryPath; - var fragmentStart = filePath.indexOf('#'); - var fragment = ''; + const fragmentStart = filePath.indexOf('#'); + let fragment = ''; if (fragmentStart !== -1) { fragment = filePath.slice(fragmentStart); filePath = filePath.slice(0, fragmentStart); } - var fileManager = environment.getFileManager(filePath, currentDirectory, functionContext.context, environment, true); + const fileManager = environment.getFileManager(filePath, currentDirectory, functionContext.context, environment, true); if (!fileManager) { throw { type: 'File', - message: 'Can not set up FileManager for ' + filePathNode + message: `Can not set up FileManager for ${filePathNode}` }; } - var fileSync = fileManager.loadFileSync(filePath, currentDirectory, functionContext.context, environment); + const fileSync = fileManager.loadFileSync(filePath, currentDirectory, functionContext.context, environment); if (fileSync.error) { throw fileSync.error; } - var sizeOf = require('image-size'); + const sizeOf = require('image-size'); return sizeOf(fileSync.filename); } - var imageFunctions = { + const imageFunctions = { 'image-size': function(filePathNode) { - var size = imageSize(this, filePathNode); + const size = imageSize(this, filePathNode); return new Expression([ new Dimension(size.width, 'px'), new Dimension(size.height, 'px') ]); }, 'image-width': function(filePathNode) { - var size = imageSize(this, filePathNode); + const size = imageSize(this, filePathNode); return new Dimension(size.width, 'px'); }, 'image-height': function(filePathNode) { - var size = imageSize(this, filePathNode); + const size = imageSize(this, filePathNode); return new Dimension(size.height, 'px'); } }; diff --git a/lib/less-node/index.js b/lib/less-node/index.js index d485aa9c2..fc8c4fe4d 100644 --- a/lib/less-node/index.js +++ b/lib/less-node/index.js @@ -1,10 +1,10 @@ -var environment = require('./environment'), - FileManager = require('./file-manager'), - UrlFileManager = require('./url-file-manager'), - createFromEnvironment = require('../less'), - less = createFromEnvironment(environment, [new FileManager(), new UrlFileManager()]), - lesscHelper = require('./lessc-helper'), - path = require('path'); +import environment from './environment'; +import FileManager from './file-manager'; +import UrlFileManager from './url-file-manager'; +import createFromEnvironment from '../less'; +const less = createFromEnvironment(environment, [new FileManager(), new UrlFileManager()]); +import lesscHelper from './lessc-helper'; +import path from 'path'; // allow people to create less with their own environment less.createFromEnvironment = createFromEnvironment; @@ -20,4 +20,4 @@ less.options = require('../less/default-options')(); // provide image-size functionality require('./image-size')(less.environment); -module.exports = less; +export default less; diff --git a/lib/less-node/lessc-helper.js b/lib/less-node/lessc-helper.js index 4d33733e4..c2c12d1c2 100644 --- a/lib/less-node/lessc-helper.js +++ b/lib/less-node/lessc-helper.js @@ -1,11 +1,11 @@ // lessc_helper.js // // helper functions for lessc -var lessc_helper = { +const lessc_helper = { // Stylize a string stylize : function(str, style) { - var styles = { + const styles = { 'reset' : [0, 0], 'bold' : [1, 22], 'inverse' : [7, 27], @@ -15,8 +15,7 @@ var lessc_helper = { 'red' : [31, 39], 'grey' : [90, 39] }; - return '\x1b[' + styles[style][0] + 'm' + str + - '\x1b[' + styles[style][1] + 'm'; + return `\x1b[${styles[style][0]}m${str}\x1b[${styles[style][1]}m`; }, // Print command line options @@ -87,4 +86,4 @@ var lessc_helper = { }; // Exports helper functions -for (var h in lessc_helper) { if (lessc_helper.hasOwnProperty(h)) { exports[h] = lessc_helper[h]; }} +for (const h in lessc_helper) { if (lessc_helper.hasOwnProperty(h)) { exports[h] = lessc_helper[h]; }} diff --git a/lib/less-node/plugin-loader.js b/lib/less-node/plugin-loader.js index 8e6f4fbfc..961ba8460 100644 --- a/lib/less-node/plugin-loader.js +++ b/lib/less-node/plugin-loader.js @@ -1,52 +1,52 @@ -var path = require('path'), - PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise, - AbstractPluginLoader = require('../less/environment/abstract-plugin-loader.js'); +import path from 'path'; +const PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; +import AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js'; /** * Node Plugin Loader */ -var PluginLoader = function(less) { - this.less = less; - this.require = function(prefix) { - prefix = path.dirname(prefix); - return function(id) { - var str = id.substr(0, 2); - if (str === '..' || str === './') { - return require(path.join(prefix, id)); - } - else { - return require(id); - } +class PluginLoader extends AbstractPluginLoader { + constructor(less) { + this.less = less; + this.require = prefix => { + prefix = path.dirname(prefix); + return id => { + const str = id.substr(0, 2); + if (str === '..' || str === './') { + return require(path.join(prefix, id)); + } + else { + return require(id); + } + }; }; - }; -}; - -PluginLoader.prototype = new AbstractPluginLoader(); - -PluginLoader.prototype.loadPlugin = function(filename, basePath, context, environment, fileManager) { - var prefix = filename.slice(0, 1); - var explicit = prefix === '.' || prefix === '/' || filename.slice(-3).toLowerCase() === '.js'; - if (!explicit) { - context.prefixes = ['less-plugin-', '']; } - return new PromiseConstructor(function(fulfill, reject) { - fileManager.loadFile(filename, basePath, context, environment).then( - function(data) { - try { - fulfill(data); - } - catch (e) { - console.log(e); - reject(e); + loadPlugin(filename, basePath, context, environment, fileManager) { + const prefix = filename.slice(0, 1); + const explicit = prefix === '.' || prefix === '/' || filename.slice(-3).toLowerCase() === '.js'; + if (!explicit) { + context.prefixes = ['less-plugin-', '']; + } + + return new PromiseConstructor((fulfill, reject) => { + fileManager.loadFile(filename, basePath, context, environment).then( + data => { + try { + fulfill(data); + } + catch (e) { + console.log(e); + reject(e); + } } - } - ).catch(function(err) { - reject(err); + ).catch(err => { + reject(err); + }); }); - }); -}; + } +} -module.exports = PluginLoader; +export default PluginLoader; diff --git a/lib/less-node/url-file-manager.js b/lib/less-node/url-file-manager.js index a9dbb1c47..7fda8f1e7 100644 --- a/lib/less-node/url-file-manager.js +++ b/lib/less-node/url-file-manager.js @@ -1,24 +1,22 @@ -var isUrlRe = /^(?:https?:)?\/\//i, - url = require('url'), - request, - PromiseConstructor, - AbstractFileManager = require('../less/environment/abstract-file-manager.js'), - logger = require('../less/logger'); - -var UrlFileManager = function() { +const isUrlRe = /^(?:https?:)?\/\//i; +import url from 'url'; +let request; +let PromiseConstructor; +import AbstractFileManager from '../less/environment/abstract-file-manager.js'; +import logger from '../less/logger'; + +const UrlFileManager = () => { }; UrlFileManager.prototype = new AbstractFileManager(); -UrlFileManager.prototype.supports = function(filename, currentDirectory, options, environment) { - return isUrlRe.test( filename ) || isUrlRe.test(currentDirectory); -}; +UrlFileManager.prototype.supports = (filename, currentDirectory, options, environment) => isUrlRe.test( filename ) || isUrlRe.test(currentDirectory); -UrlFileManager.prototype.loadFile = function(filename, currentDirectory, options, environment) { +UrlFileManager.prototype.loadFile = (filename, currentDirectory, options, environment) => { if (!PromiseConstructor) { PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; } - return new PromiseConstructor(function(fulfill, reject) { + return new PromiseConstructor((fulfill, reject) => { if (request === undefined) { try { request = require('request'); } catch (e) { request = null; } @@ -28,29 +26,29 @@ UrlFileManager.prototype.loadFile = function(filename, currentDirectory, options return; } - var urlStr = isUrlRe.test( filename ) ? filename : url.resolve(currentDirectory, filename), - urlObj = url.parse(urlStr); + let urlStr = isUrlRe.test( filename ) ? filename : url.resolve(currentDirectory, filename); + const urlObj = url.parse(urlStr); if (!urlObj.protocol) { urlObj.protocol = 'http'; urlStr = urlObj.format(); } - request.get({uri: urlStr, strictSSL: !options.insecure }, function (error, res, body) { + request.get({uri: urlStr, strictSSL: !options.insecure }, (error, res, body) => { if (error) { - reject({ type: 'File', message: 'resource \'' + urlStr + '\' gave this Error:\n ' + error + '\n' }); + reject({ type: 'File', message: `resource '${urlStr}' gave this Error:\n ${error}\n` }); return; } if (res && res.statusCode === 404) { - reject({ type: 'File', message: 'resource \'' + urlStr + '\' was not found\n' }); + reject({ type: 'File', message: `resource '${urlStr}' was not found\n` }); return; } if (!body) { - logger.warn('Warning: Empty body (HTTP ' + res.statusCode + ') returned by "' + urlStr + '"'); + logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`); } fulfill({ contents: body, filename: urlStr }); }); }); }; -module.exports = UrlFileManager; +export default UrlFileManager; diff --git a/lib/less/constants.js b/lib/less/constants.js index ac20cc7a6..93bb94b93 100644 --- a/lib/less/constants.js +++ b/lib/less/constants.js @@ -1,4 +1,4 @@ -module.exports = { +export default { Math: { ALWAYS: 0, PARENS_DIVISION: 1, diff --git a/lib/less/contexts.js b/lib/less/contexts.js index 1f87f1ee1..d67abfc8a 100644 --- a/lib/less/contexts.js +++ b/lib/less/contexts.js @@ -1,11 +1,11 @@ -var contexts = {}; -module.exports = contexts; -var Constants = require('./constants'); +const contexts = {}; +export default contexts; +import Constants from './constants'; -var copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) { +const copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) { if (!original) { return; } - for (var i = 0; i < propertiesToCopy.length; i++) { + for (let i = 0; i < propertiesToCopy.length; i++) { if (original.hasOwnProperty(propertiesToCopy[i])) { destination[propertiesToCopy[i]] = original[propertiesToCopy[i]]; } @@ -15,7 +15,7 @@ var copyFromOriginal = function copyFromOriginal(original, destination, properti /* parse is used whilst parsing */ -var parseCopyProperties = [ +const parseCopyProperties = [ // options 'paths', // option - unmodified - paths to search for imports on 'rewriteUrls', // option - whether to adjust URL's to be relative @@ -40,7 +40,7 @@ contexts.Parse = function(options) { if (typeof this.paths === 'string') { this.paths = [this.paths]; } }; -var evalCopyProperties = [ +const evalCopyProperties = [ 'paths', // additional include paths 'compress', // whether to compress 'ieCompat', // whether to enforce IE compatibility (IE8 data-uri) @@ -106,13 +106,13 @@ contexts.Eval.prototype.isMathOn = function (op) { }; contexts.Eval.prototype.pathRequiresRewrite = function (path) { - var isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; + const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; return isRelative(path); }; contexts.Eval.prototype.rewritePath = function (path, rootpath) { - var newPath; + let newPath; rootpath = rootpath || ''; newPath = this.normalizePath(rootpath + path); @@ -122,16 +122,15 @@ contexts.Eval.prototype.rewritePath = function (path, rootpath) { if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { - newPath = './' + newPath; + newPath = `./${newPath}`; } return newPath; }; -contexts.Eval.prototype.normalizePath = function (path) { - var - segments = path.split('/').reverse(), - segment; +contexts.Eval.prototype.normalizePath = path => { + const segments = path.split('/').reverse(); + let segment; path = []; while (segments.length !== 0) { diff --git a/lib/less/data/colors.js b/lib/less/data/colors.js index af30a6b6a..3bf17a1f1 100644 --- a/lib/less/data/colors.js +++ b/lib/less/data/colors.js @@ -1,4 +1,4 @@ -module.exports = { +export default { 'aliceblue':'#f0f8ff', 'antiquewhite':'#faebd7', 'aqua':'#00ffff', diff --git a/lib/less/data/index.js b/lib/less/data/index.js index ced7f71e8..b7e4f5939 100644 --- a/lib/less/data/index.js +++ b/lib/less/data/index.js @@ -1,4 +1,4 @@ -module.exports = { +export default { colors: require('./colors'), unitConversions: require('./unit-conversions') }; diff --git a/lib/less/data/unit-conversions.js b/lib/less/data/unit-conversions.js index da292ab24..1c1593e07 100644 --- a/lib/less/data/unit-conversions.js +++ b/lib/less/data/unit-conversions.js @@ -1,4 +1,4 @@ -module.exports = { +export default { length: { 'm': 1, 'cm': 0.01, diff --git a/lib/less/default-options.js b/lib/less/default-options.js index 3ac87d36e..5df7dc658 100644 --- a/lib/less/default-options.js +++ b/lib/less/default-options.js @@ -1,73 +1,72 @@ // Export a new default each time -module.exports = function() { - return { - /* Inline Javascript - @plugin still allowed */ - javascriptEnabled: false, +export default () => ({ + /* Inline Javascript - @plugin still allowed */ + javascriptEnabled: false, - /* Outputs a makefile import dependency list to stdout. */ - depends: false, + /* Outputs a makefile import dependency list to stdout. */ + depends: false, - /* (DEPRECATED) Compress using less built-in compression. - * This does an okay job but does not utilise all the tricks of - * dedicated css compression. */ - compress: false, + /* (DEPRECATED) Compress using less built-in compression. + * This does an okay job but does not utilise all the tricks of + * dedicated css compression. */ + compress: false, - /* Runs the less parser and just reports errors without any output. */ - lint: false, + /* Runs the less parser and just reports errors without any output. */ + lint: false, - /* Sets available include paths. - * If the file in an @import rule does not exist at that exact location, - * less will look for it at the location(s) passed to this option. - * You might use this for instance to specify a path to a library which - * you want to be referenced simply and relatively in the less files. */ - paths: [], + /* Sets available include paths. + * If the file in an @import rule does not exist at that exact location, + * less will look for it at the location(s) passed to this option. + * You might use this for instance to specify a path to a library which + * you want to be referenced simply and relatively in the less files. */ + paths: [], - /* color output in the terminal */ - color: true, + /* color output in the terminal */ + color: true, - /* The strictImports controls whether the compiler will allow an @import inside of either - * @media blocks or (a later addition) other selector blocks. - * See: https://github.com/less/less.js/issues/656 */ - strictImports: false, + /* The strictImports controls whether the compiler will allow an @import inside of either + * @media blocks or (a later addition) other selector blocks. + * See: https://github.com/less/less.js/issues/656 */ + strictImports: false, - /* Allow Imports from Insecure HTTPS Hosts */ - insecure: false, + /* Allow Imports from Insecure HTTPS Hosts */ + insecure: false, - /* Allows you to add a path to every generated import and url in your css. - * This does not affect less import statements that are processed, just ones - * that are left in the output css. */ - rootpath: '', + /* Allows you to add a path to every generated import and url in your css. + * This does not affect less import statements that are processed, just ones + * that are left in the output css. */ + rootpath: '', - /* By default URLs are kept as-is, so if you import a file in a sub-directory - * that references an image, exactly the same URL will be output in the css. - * This option allows you to re-write URL's in imported files so that the - * URL is always relative to the base imported file */ - rewriteUrls: false, + /* By default URLs are kept as-is, so if you import a file in a sub-directory + * that references an image, exactly the same URL will be output in the css. + * This option allows you to re-write URL's in imported files so that the + * URL is always relative to the base imported file */ + rewriteUrls: false, - /* Compatibility with IE8. Used for limiting data-uri length */ - ieCompat: false, // true until 3.0 + /* Compatibility with IE8. Used for limiting data-uri length */ + // true until 3.0 + ieCompat: false, - /* How to process math - * 0 always - eagerly try to solve all operations - * 1 parens-division - require parens for division "/" - * 2 parens | strict - require parens for all operations - * 3 strict-legacy - legacy strict behavior (super-strict) - */ - math: 0, + /* How to process math + * 0 always - eagerly try to solve all operations + * 1 parens-division - require parens for division "/" + * 2 parens | strict - require parens for all operations + * 3 strict-legacy - legacy strict behavior (super-strict) + */ + math: 0, - /* Without this option, less attempts to guess at the output unit when it does maths. */ - strictUnits: false, + /* Without this option, less attempts to guess at the output unit when it does maths. */ + strictUnits: false, - /* Effectively the declaration is put at the top of your base Less file, - * meaning it can be used but it also can be overridden if this variable - * is defined in the file. */ - globalVars: null, + /* Effectively the declaration is put at the top of your base Less file, + * meaning it can be used but it also can be overridden if this variable + * is defined in the file. */ + globalVars: null, - /* As opposed to the global variable option, this puts the declaration at the - * end of your base file, meaning it will override anything defined in your Less file. */ - modifyVars: null, + /* As opposed to the global variable option, this puts the declaration at the + * end of your base file, meaning it will override anything defined in your Less file. */ + modifyVars: null, - /* This option allows you to specify a argument to go on to every URL. */ - urlArgs: '' - } -} \ No newline at end of file + /* This option allows you to specify a argument to go on to every URL. */ + urlArgs: '' +}); \ No newline at end of file diff --git a/lib/less/environment/abstract-file-manager.js b/lib/less/environment/abstract-file-manager.js index 36428f061..e6a795bc0 100644 --- a/lib/less/environment/abstract-file-manager.js +++ b/lib/less/environment/abstract-file-manager.js @@ -1,8 +1,8 @@ -var abstractFileManager = function() { +const abstractFileManager = () => { }; -abstractFileManager.prototype.getPath = function (filename) { - var j = filename.lastIndexOf('?'); +abstractFileManager.prototype.getPath = filename => { + let j = filename.lastIndexOf('?'); if (j > 0) { filename = filename.slice(0, j); } @@ -16,27 +16,19 @@ abstractFileManager.prototype.getPath = function (filename) { return filename.slice(0, j + 1); }; -abstractFileManager.prototype.tryAppendExtension = function(path, ext) { - return /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; -}; +abstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; abstractFileManager.prototype.tryAppendLessExtension = function(path) { return this.tryAppendExtension(path, '.less'); }; -abstractFileManager.prototype.supportsSync = function() { - return false; -}; +abstractFileManager.prototype.supportsSync = () => false; -abstractFileManager.prototype.alwaysMakePathsAbsolute = function() { - return false; -}; +abstractFileManager.prototype.alwaysMakePathsAbsolute = () => false; -abstractFileManager.prototype.isPathAbsolute = function(filename) { - return (/^(?:[a-z-]+:|\/|\\|#)/i).test(filename); -}; +abstractFileManager.prototype.isPathAbsolute = filename => (/^(?:[a-z-]+:|\/|\\|#)/i).test(filename); // TODO: pull out / replace? -abstractFileManager.prototype.join = function(basePath, laterPath) { +abstractFileManager.prototype.join = (basePath, laterPath) => { if (!basePath) { return laterPath; } @@ -46,9 +38,14 @@ abstractFileManager.prototype.join = function(basePath, laterPath) { abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { // diff between two paths to create a relative path - var urlParts = this.extractUrlParts(url), - baseUrlParts = this.extractUrlParts(baseUrl), - i, max, urlDirectories, baseUrlDirectories, diff = ''; + const urlParts = this.extractUrlParts(url); + + const baseUrlParts = this.extractUrlParts(baseUrl); + let i; + let max; + let urlDirectories; + let baseUrlDirectories; + let diff = ''; if (urlParts.hostPart !== baseUrlParts.hostPart) { return ''; } @@ -62,7 +59,7 @@ abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { diff += '../'; } for (i = 0; i < urlDirectories.length - 1; i++) { - diff += urlDirectories[i] + '/'; + diff += `${urlDirectories[i]}/`; } return diff; }; @@ -74,19 +71,24 @@ abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, ba // urlParts[4] = filename // urlParts[5] = parameters - var urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i, - urlParts = url.match(urlPartsRegex), - returner = {}, rawDirectories = [], directories = [], i, baseUrlParts; + const urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; + + const urlParts = url.match(urlPartsRegex); + const returner = {}; + let rawDirectories = []; + const directories = []; + let i; + let baseUrlParts; if (!urlParts) { - throw new Error('Could not parse sheet href - \'' + url + '\''); + throw new Error(`Could not parse sheet href - '${url}'`); } // Stylesheets in IE don't always return the full path if (baseUrl && (!urlParts[1] || urlParts[2])) { baseUrlParts = baseUrl.match(urlPartsRegex); if (!baseUrlParts) { - throw new Error('Could not parse page url - \'' + baseUrl + '\''); + throw new Error(`Could not parse page url - '${baseUrl}'`); } urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; if (!urlParts[2]) { @@ -120,4 +122,4 @@ abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, ba return returner; }; -module.exports = abstractFileManager; +export default abstractFileManager; diff --git a/lib/less/environment/abstract-plugin-loader.js b/lib/less/environment/abstract-plugin-loader.js index ba3b6771a..50caeb4bb 100644 --- a/lib/less/environment/abstract-plugin-loader.js +++ b/lib/less/environment/abstract-plugin-loader.js @@ -1,43 +1,105 @@ -var functionRegistry = require('../functions/function-registry'), - LessError = require('../less-error'); +import functionRegistry from '../functions/function-registry'; +import LessError from '../less-error'; -var AbstractPluginLoader = function() { - // Implemented by Node.js plugin loader - this.require = function() { - return null; +class AbstractPluginLoader { + constructor() { + // Implemented by Node.js plugin loader + this.require = () => null } -}; -AbstractPluginLoader.prototype.evalPlugin = function(contents, context, imports, pluginOptions, fileInfo) { + evalPlugin(contents, context, imports, pluginOptions, fileInfo) { + let loader; + let registry; + let pluginObj; + let localModule; + let pluginManager; + let filename; + let result; + + pluginManager = context.pluginManager; - var loader, - registry, - pluginObj, - localModule, - pluginManager, - filename, - result; + if (fileInfo) { + if (typeof fileInfo === 'string') { + filename = fileInfo; + } + else { + filename = fileInfo.filename; + } + } + const shortname = (new this.less.FileManager()).extractUrlParts(filename).filename; - pluginManager = context.pluginManager; + if (filename) { + pluginObj = pluginManager.get(filename); - if (fileInfo) { - if (typeof fileInfo === 'string') { - filename = fileInfo; + if (pluginObj) { + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + if (result) { + return result; + } + try { + if (pluginObj.use) { + pluginObj.use.call(this.context, pluginObj); + } + } + catch (e) { + e.message = e.message || 'Error during @plugin call'; + return new LessError(e, imports, filename); + } + return pluginObj; + } } - else { - filename = fileInfo.filename; + localModule = { + exports: {}, + pluginManager, + fileInfo + }; + registry = functionRegistry.create(); + + const registerPlugin = obj => { + pluginObj = obj; + }; + + try { + loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents); + loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo); + } + catch (e) { + return new LessError(e, imports, filename); } - } - var shortname = (new this.less.FileManager()).extractUrlParts(filename).filename; - if (filename) { - pluginObj = pluginManager.get(filename); + if (!pluginObj) { + pluginObj = localModule.exports; + } + pluginObj = this.validatePlugin(pluginObj, filename, shortname); + + if (pluginObj instanceof LessError) { + return pluginObj; + } if (pluginObj) { + pluginObj.imports = imports; + pluginObj.filename = filename; + + // For < 3.x (or unspecified minVersion) - setOptions() before install() + if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) { + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; + } + } + + // Run on first load + pluginManager.addPlugin(pluginObj, fileInfo.filename, registry); + pluginObj.functions = registry.getLocalFunctions(); + + // Need to call setOptions again because the pluginObj might have functions result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); if (result) { return result; } + + // Run every @plugin call try { if (pluginObj.use) { pluginObj.use.call(this.context, pluginObj); @@ -47,143 +109,79 @@ AbstractPluginLoader.prototype.evalPlugin = function(contents, context, imports, e.message = e.message || 'Error during @plugin call'; return new LessError(e, imports, filename); } - return pluginObj; - } - } - localModule = { - exports: {}, - pluginManager: pluginManager, - fileInfo: fileInfo - }; - registry = functionRegistry.create(); - - var registerPlugin = function(obj) { - pluginObj = obj; - }; - - try { - loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents); - loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo); - } - catch (e) { - return new LessError(e, imports, filename); - } - if (!pluginObj) { - pluginObj = localModule.exports; - } - pluginObj = this.validatePlugin(pluginObj, filename, shortname); + } + else { + return new LessError({ message: 'Not a valid plugin' }, imports, filename); + } - if (pluginObj instanceof LessError) { return pluginObj; } - if (pluginObj) { - pluginObj.imports = imports; - pluginObj.filename = filename; - - // For < 3.x (or unspecified minVersion) - setOptions() before install() - if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) { - result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); - - if (result) { - return result; - } - } - - // Run on first load - pluginManager.addPlugin(pluginObj, fileInfo.filename, registry); - pluginObj.functions = registry.getLocalFunctions(); - - // Need to call setOptions again because the pluginObj might have functions - result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); - if (result) { - return result; + trySetOptions(plugin, filename, name, options) { + if (options && !plugin.setOptions) { + return new LessError({ + message: `Options have been provided but the plugin ${name} does not support any options.` + }); } - - // Run every @plugin call try { - if (pluginObj.use) { - pluginObj.use.call(this.context, pluginObj); - } + plugin.setOptions && plugin.setOptions(options); } catch (e) { - e.message = e.message || 'Error during @plugin call'; - return new LessError(e, imports, filename); + return new LessError(e); } - - } - else { - return new LessError({ message: 'Not a valid plugin' }, imports, filename); } - return pluginObj; - -}; + validatePlugin(plugin, filename, name) { + if (plugin) { + // support plugins being a function + // so that the plugin can be more usable programmatically + if (typeof plugin === 'function') { + plugin = new plugin(); + } -AbstractPluginLoader.prototype.trySetOptions = function(plugin, filename, name, options) { - if (options && !plugin.setOptions) { - return new LessError({ - message: 'Options have been provided but the plugin ' + - name + ' does not support any options.' - }); - } - try { - plugin.setOptions && plugin.setOptions(options); - } - catch (e) { - return new LessError(e); - } -}; - -AbstractPluginLoader.prototype.validatePlugin = function(plugin, filename, name) { - if (plugin) { - // support plugins being a function - // so that the plugin can be more usable programmatically - if (typeof plugin === 'function') { - plugin = new plugin(); - } - - if (plugin.minVersion) { - if (this.compareVersion(plugin.minVersion, this.less.version) < 0) { - return new LessError({ - message: 'Plugin ' + name + ' requires version ' + - this.versionToString(plugin.minVersion) - }); + if (plugin.minVersion) { + if (this.compareVersion(plugin.minVersion, this.less.version) < 0) { + return new LessError({ + message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}` + }); + } } + return plugin; } - return plugin; + return null; } - return null; -}; -AbstractPluginLoader.prototype.compareVersion = function(aVersion, bVersion) { - if (typeof aVersion === 'string') { - aVersion = aVersion.match(/^(\d+)\.?(\d+)?\.?(\d+)?/); - aVersion.shift(); - } - for (var i = 0; i < aVersion.length; i++) { - if (aVersion[i] !== bVersion[i]) { - return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1; + compareVersion(aVersion, bVersion) { + if (typeof aVersion === 'string') { + aVersion = aVersion.match(/^(\d+)\.?(\d+)?\.?(\d+)?/); + aVersion.shift(); + } + for (let i = 0; i < aVersion.length; i++) { + if (aVersion[i] !== bVersion[i]) { + return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1; + } } + return 0; } - return 0; -}; -AbstractPluginLoader.prototype.versionToString = function(version) { - var versionString = ''; - for (var i = 0; i < version.length; i++) { - versionString += (versionString ? '.' : '') + version[i]; + + versionToString(version) { + let versionString = ''; + for (let i = 0; i < version.length; i++) { + versionString += (versionString ? '.' : '') + version[i]; + } + return versionString; } - return versionString; -}; -AbstractPluginLoader.prototype.printUsage = function(plugins) { - for (var i = 0; i < plugins.length; i++) { - var plugin = plugins[i]; - if (plugin.printUsage) { - plugin.printUsage(); + + printUsage(plugins) { + for (let i = 0; i < plugins.length; i++) { + const plugin = plugins[i]; + if (plugin.printUsage) { + plugin.printUsage(); + } } } -}; +} -module.exports = AbstractPluginLoader; +export default AbstractPluginLoader; diff --git a/lib/less/environment/environment-api.js b/lib/less/environment/environment-api.js index ae6beff40..88d2927ea 100644 --- a/lib/less/environment/environment-api.js +++ b/lib/less/environment/environment-api.js @@ -1,4 +1,4 @@ -module.exports = { +export default { /** * Converts a string to a base 64 string * @param str diff --git a/lib/less/environment/environment.js b/lib/less/environment/environment.js index 926d48f32..340c8e14b 100644 --- a/lib/less/environment/environment.js +++ b/lib/less/environment/environment.js @@ -3,54 +3,57 @@ * environment, file managers, and plugin manager */ -var logger = require('../logger'); -var environment = function(externalEnvironment, fileManagers) { - this.fileManagers = fileManagers || []; - externalEnvironment = externalEnvironment || {}; - - var optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator'], - requiredFunctions = [], - functions = requiredFunctions.concat(optionalFunctions); - - for (var i = 0; i < functions.length; i++) { - var propName = functions[i], - environmentFunc = externalEnvironment[propName]; - if (environmentFunc) { - this[propName] = environmentFunc.bind(externalEnvironment); - } else if (i < requiredFunctions.length) { - this.warn('missing required function in environment - ' + propName); +import logger from '../logger'; + +class environment { + constructor(externalEnvironment, fileManagers) { + this.fileManagers = fileManagers || []; + externalEnvironment = externalEnvironment || {}; + + const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator']; + const requiredFunctions = []; + const functions = requiredFunctions.concat(optionalFunctions); + + for (let i = 0; i < functions.length; i++) { + const propName = functions[i]; + const environmentFunc = externalEnvironment[propName]; + if (environmentFunc) { + this[propName] = environmentFunc.bind(externalEnvironment); + } else if (i < requiredFunctions.length) { + this.warn(`missing required function in environment - ${propName}`); + } } } -}; -environment.prototype.getFileManager = function (filename, currentDirectory, options, environment, isSync) { + getFileManager(filename, currentDirectory, options, environment, isSync) { - if (!filename) { - logger.warn('getFileManager called with no filename.. Please report this issue. continuing.'); - } - if (currentDirectory == null) { - logger.warn('getFileManager called with null directory.. Please report this issue. continuing.'); - } + if (!filename) { + logger.warn('getFileManager called with no filename.. Please report this issue. continuing.'); + } + if (currentDirectory == null) { + logger.warn('getFileManager called with null directory.. Please report this issue. continuing.'); + } - var fileManagers = this.fileManagers; - if (options.pluginManager) { - fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers()); - } - for (var i = fileManagers.length - 1; i >= 0 ; i--) { - var fileManager = fileManagers[i]; - if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) { - return fileManager; + let fileManagers = this.fileManagers; + if (options.pluginManager) { + fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers()); + } + for (let i = fileManagers.length - 1; i >= 0 ; i--) { + const fileManager = fileManagers[i]; + if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) { + return fileManager; + } } + return null; } - return null; -}; -environment.prototype.addFileManager = function (fileManager) { - this.fileManagers.push(fileManager); -}; + addFileManager(fileManager) { + this.fileManagers.push(fileManager); + } -environment.prototype.clearFileManagers = function () { - this.fileManagers = []; -}; + clearFileManagers() { + this.fileManagers = []; + } +} -module.exports = environment; +export default environment; diff --git a/lib/less/environment/file-manager-api.js b/lib/less/environment/file-manager-api.js index c4d043e6d..15cebeda0 100644 --- a/lib/less/environment/file-manager-api.js +++ b/lib/less/environment/file-manager-api.js @@ -1,4 +1,4 @@ -module.exports = { +export default { /** * Given the full path to a file, return the path component * Provided by AbstractFileManager diff --git a/lib/less/functions/boolean.js b/lib/less/functions/boolean.js index 829ee207a..5afc33a4d 100644 --- a/lib/less/functions/boolean.js +++ b/lib/less/functions/boolean.js @@ -1,7 +1,7 @@ -var functionRegistry = require('./function-registry'), - Anonymous = require('../tree/anonymous'), - Keyword = require('../tree/keyword'); +import functionRegistry from './function-registry'; +import Anonymous from '../tree/anonymous'; +import Keyword from '../tree/keyword'; functionRegistry.addMultiple({ boolean: function(condition) { diff --git a/lib/less/functions/color-blending.js b/lib/less/functions/color-blending.js index e34979e39..be2a5beb4 100644 --- a/lib/less/functions/color-blending.js +++ b/lib/less/functions/color-blending.js @@ -1,16 +1,26 @@ -var Color = require('../tree/color'), - functionRegistry = require('./function-registry'); +import Color from '../tree/color'; +import functionRegistry from './function-registry'; // Color Blending // ref: http://www.w3.org/TR/compositing-1 function colorBlend(mode, color1, color2) { - var ab = color1.alpha, cb, // backdrop - as = color2.alpha, cs, // source - ar, cr, r = []; // result + const ab = color1.alpha; // result + + let // backdrop + cb; + + const as = color2.alpha; + + let // source + cs; + + let ar; + let cr; + const r = []; ar = as + ab * (1 - as); - for (var i = 0; i < 3; i++) { + for (let i = 0; i < 3; i++) { cb = color1.rgb[i] / 255; cs = color2.rgb[i] / 255; cr = mode(cb, cs); @@ -24,7 +34,7 @@ function colorBlend(mode, color1, color2) { return new Color(r, ar); } -var colorBlendModeFunctions = { +const colorBlendModeFunctions = { multiply: function(cb, cs) { return cb * cs; }, @@ -38,7 +48,8 @@ var colorBlendModeFunctions = { colorBlendModeFunctions.screen(cb - 1, cs); }, softlight: function(cb, cs) { - var d = 1, e = cb; + let d = 1; + let e = cb; if (cs > 0.5) { e = 1; d = (cb > 0.25) ? Math.sqrt(cb) @@ -65,7 +76,7 @@ var colorBlendModeFunctions = { } }; -for (var f in colorBlendModeFunctions) { +for (const f in colorBlendModeFunctions) { if (colorBlendModeFunctions.hasOwnProperty(f)) { colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]); } diff --git a/lib/less/functions/color.js b/lib/less/functions/color.js index a9b5198e8..c86a023a6 100644 --- a/lib/less/functions/color.js +++ b/lib/less/functions/color.js @@ -1,15 +1,15 @@ -var Dimension = require('../tree/dimension'), - Color = require('../tree/color'), - Quoted = require('../tree/quoted'), - Anonymous = require('../tree/anonymous'), - functionRegistry = require('./function-registry'), - colorFunctions; +import Dimension from '../tree/dimension'; +import Color from '../tree/color'; +import Quoted from '../tree/quoted'; +import Anonymous from '../tree/anonymous'; +import functionRegistry from './function-registry'; +let colorFunctions; function clamp(val) { return Math.min(1, Math.max(0, val)); } function hsla(origColor, hsl) { - var color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a); + const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a); if (color) { if (origColor.value && /^(rgb|hsl)/.test(origColor.value)) { @@ -57,7 +57,7 @@ function scaled(n, size) { } colorFunctions = { rgb: function (r, g, b) { - var color = colorFunctions.rgba(r, g, b, 1.0); + const color = colorFunctions.rgba(r, g, b, 1.0); if (color) { color.value = 'rgb'; return color; @@ -73,14 +73,14 @@ colorFunctions = { } return new Color(r.rgb, a, 'rgba'); } - var rgb = [r, g, b].map(function (c) { return scaled(c, 255); }); + const rgb = [r, g, b].map(c => scaled(c, 255)); a = number(a); return new Color(rgb, a, 'rgba'); } catch (e) {} }, hsl: function (h, s, l) { - var color = colorFunctions.hsla(h, s, l, 1.0); + const color = colorFunctions.hsla(h, s, l, 1.0); if (color) { color.value = 'hsl'; return color; @@ -97,7 +97,8 @@ colorFunctions = { return new Color(h.rgb, a, 'hsla'); } - var m1, m2; + let m1; + let m2; function hue(h) { h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h); @@ -116,12 +117,12 @@ colorFunctions = { } h = (number(h) % 360) / 360; - s = clamp(number(s)); l = clamp(number(l)); a = clamp(number(a)); + s = clamp(number(s));l = clamp(number(l));a = clamp(number(a)); m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s; m1 = l * 2 - m2; - var rgb = [ + const rgb = [ hue(h + 1 / 3) * 255, hue(h) * 255, hue(h - 1 / 3) * 255 @@ -138,17 +139,18 @@ colorFunctions = { hsva: function(h, s, v, a) { h = ((number(h) % 360) / 360) * 360; - s = number(s); v = number(v); a = number(a); + s = number(s);v = number(v);a = number(a); - var i, f; + let i; + let f; i = Math.floor((h / 60) % 6); f = (h / 60) - i; - var vs = [v, + const vs = [v, v * (1 - s), v * (1 - f * s), v * (1 - (1 - f) * s)]; - var perm = [[0, 3, 1], + const perm = [[0, 3, 1], [2, 0, 1], [1, 0, 3], [1, 2, 0], @@ -195,7 +197,7 @@ colorFunctions = { return new Dimension(color.luma() * color.alpha * 100, '%'); }, luminance: function (color) { - var luminance = + const luminance = (0.2126 * color.rgb[0] / 255) + (0.7152 * color.rgb[1] / 255) + (0.0722 * color.rgb[2] / 255); @@ -208,7 +210,7 @@ colorFunctions = { if (!color.rgb) { return null; } - var hsl = toHSL(color); + const hsl = toHSL(color); if (typeof method !== 'undefined' && method.value === 'relative') { hsl.s += hsl.s * amount.value / 100; @@ -220,7 +222,7 @@ colorFunctions = { return hsla(color, hsl); }, desaturate: function (color, amount, method) { - var hsl = toHSL(color); + const hsl = toHSL(color); if (typeof method !== 'undefined' && method.value === 'relative') { hsl.s -= hsl.s * amount.value / 100; @@ -232,7 +234,7 @@ colorFunctions = { return hsla(color, hsl); }, lighten: function (color, amount, method) { - var hsl = toHSL(color); + const hsl = toHSL(color); if (typeof method !== 'undefined' && method.value === 'relative') { hsl.l += hsl.l * amount.value / 100; @@ -244,7 +246,7 @@ colorFunctions = { return hsla(color, hsl); }, darken: function (color, amount, method) { - var hsl = toHSL(color); + const hsl = toHSL(color); if (typeof method !== 'undefined' && method.value === 'relative') { hsl.l -= hsl.l * amount.value / 100; @@ -256,7 +258,7 @@ colorFunctions = { return hsla(color, hsl); }, fadein: function (color, amount, method) { - var hsl = toHSL(color); + const hsl = toHSL(color); if (typeof method !== 'undefined' && method.value === 'relative') { hsl.a += hsl.a * amount.value / 100; @@ -268,7 +270,7 @@ colorFunctions = { return hsla(color, hsl); }, fadeout: function (color, amount, method) { - var hsl = toHSL(color); + const hsl = toHSL(color); if (typeof method !== 'undefined' && method.value === 'relative') { hsl.a -= hsl.a * amount.value / 100; @@ -280,15 +282,15 @@ colorFunctions = { return hsla(color, hsl); }, fade: function (color, amount) { - var hsl = toHSL(color); + const hsl = toHSL(color); hsl.a = amount.value / 100; hsl.a = clamp(hsl.a); return hsla(color, hsl); }, spin: function (color, amount) { - var hsl = toHSL(color); - var hue = (hsl.h + amount.value) % 360; + const hsl = toHSL(color); + const hue = (hsl.h + amount.value) % 360; hsl.h = hue < 0 ? 360 + hue : hue; @@ -302,18 +304,18 @@ colorFunctions = { if (!weight) { weight = new Dimension(50); } - var p = weight.value / 100.0; - var w = p * 2 - 1; - var a = toHSL(color1).a - toHSL(color2).a; + const p = weight.value / 100.0; + const w = p * 2 - 1; + const a = toHSL(color1).a - toHSL(color2).a; - var w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0; - var w2 = 1 - w1; + const w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0; + const w2 = 1 - w1; - var rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2, + const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2, color1.rgb[1] * w1 + color2.rgb[1] * w2, color1.rgb[2] * w1 + color2.rgb[2] * w2]; - var alpha = color1.alpha * p + color2.alpha * (1 - p); + const alpha = color1.alpha * p + color2.alpha * (1 - p); return new Color(rgb, alpha); }, @@ -334,7 +336,7 @@ colorFunctions = { } // Figure out which is actually light and dark: if (dark.luma() > light.luma()) { - var t = light; + const t = light; light = dark; dark = t; } @@ -393,8 +395,8 @@ colorFunctions = { color: function(c) { if ((c instanceof Quoted) && (/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value))) { - var val = c.value.slice(1); - return new Color(val, undefined, '#' + val); + const val = c.value.slice(1); + return new Color(val, undefined, `#${val}`); } if ((c instanceof Color) || (c = Color.fromKeyword(c.value))) { c.value = undefined; diff --git a/lib/less/functions/data-uri.js b/lib/less/functions/data-uri.js index b2452505e..b2ec5ae47 100644 --- a/lib/less/functions/data-uri.js +++ b/lib/less/functions/data-uri.js @@ -1,12 +1,10 @@ -module.exports = function(environment) { - var Quoted = require('../tree/quoted'), - URL = require('../tree/url'), - utils = require('../utils'), - functionRegistry = require('./function-registry'), - fallback = function(functionThis, node) { - return new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); - }, - logger = require('../logger'); +export default environment => { + const Quoted = require('../tree/quoted'); + const URL = require('../tree/url'); + const utils = require('../utils'); + const functionRegistry = require('./function-registry'); + const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); + const logger = require('../logger'); functionRegistry.add('data-uri', function(mimetypeNode, filePathNode) { @@ -15,28 +13,28 @@ module.exports = function(environment) { mimetypeNode = null; } - var mimetype = mimetypeNode && mimetypeNode.value; - var filePath = filePathNode.value; - var currentFileInfo = this.currentFileInfo; - var currentDirectory = currentFileInfo.rewriteUrls ? + let mimetype = mimetypeNode && mimetypeNode.value; + let filePath = filePathNode.value; + const currentFileInfo = this.currentFileInfo; + const currentDirectory = currentFileInfo.rewriteUrls ? currentFileInfo.currentDirectory : currentFileInfo.entryPath; - var fragmentStart = filePath.indexOf('#'); - var fragment = ''; + const fragmentStart = filePath.indexOf('#'); + let fragment = ''; if (fragmentStart !== -1) { fragment = filePath.slice(fragmentStart); filePath = filePath.slice(0, fragmentStart); } - var context = utils.clone(this.context); + const context = utils.clone(this.context); context.rawBuffer = true; - var fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true); + const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true); if (!fileManager) { return fallback(this, filePathNode); } - var useBase64 = false; + let useBase64 = false; // detect the mimetype if not given if (!mimetypeNode) { @@ -47,7 +45,7 @@ module.exports = function(environment) { useBase64 = false; } else { // use base 64 unless it's an ASCII or UTF-8 format - var charset = environment.charsetLookup(mimetype); + const charset = environment.charsetLookup(mimetype); useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0; } if (useBase64) { mimetype += ';base64'; } @@ -56,33 +54,32 @@ module.exports = function(environment) { useBase64 = /;base64$/.test(mimetype); } - var fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment); + const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment); if (!fileSync.contents) { - logger.warn('Skipped data-uri embedding of ' + filePath + ' because file not found'); + logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`); return fallback(this, filePathNode || mimetypeNode); } - var buf = fileSync.contents; + let buf = fileSync.contents; if (useBase64 && !environment.encodeBase64) { return fallback(this, filePathNode); } buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf); - var uri = 'data:' + mimetype + ',' + buf + fragment; + const uri = `data:${mimetype},${buf}${fragment}`; // IE8 cannot handle a data-uri larger than 32,768 characters. If this is exceeded // and the --ieCompat flag is enabled, return a normal url() instead. - var DATA_URI_MAX = 32768; + const DATA_URI_MAX = 32768; if (uri.length >= DATA_URI_MAX) { if (this.context.ieCompat !== false) { - logger.warn('Skipped data-uri embedding of ' + filePath + ' because its size (' + uri.length + - ' characters) exceeds IE8-safe ' + DATA_URI_MAX + ' characters!'); + logger.warn(`Skipped data-uri embedding of ${filePath} because its size (${uri.length} characters) exceeds IE8-safe ${DATA_URI_MAX} characters!`); return fallback(this, filePathNode || mimetypeNode); } } - return new URL(new Quoted('"' + uri + '"', uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); + return new URL(new Quoted(`"${uri}"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); }); }; diff --git a/lib/less/functions/default.js b/lib/less/functions/default.js index 194dd3980..d35bdd014 100644 --- a/lib/less/functions/default.js +++ b/lib/less/functions/default.js @@ -1,9 +1,10 @@ -var Keyword = require('../tree/keyword'), - functionRegistry = require('./function-registry'); +import Keyword from '../tree/keyword'; +import functionRegistry from './function-registry'; -var defaultFunc = { +const defaultFunc = { eval: function () { - var v = this.value_, e = this.error_; + const v = this.value_; + const e = this.error_; if (e) { throw e; } @@ -24,4 +25,4 @@ var defaultFunc = { functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc)); -module.exports = defaultFunc; +export default defaultFunc; diff --git a/lib/less/functions/function-caller.js b/lib/less/functions/function-caller.js index 1062e7f50..5314d6570 100644 --- a/lib/less/functions/function-caller.js +++ b/lib/less/functions/function-caller.js @@ -1,46 +1,49 @@ -var Expression = require('../tree/expression'); +import Expression from '../tree/expression'; -var functionCaller = function(name, context, index, currentFileInfo) { - this.name = name.toLowerCase(); - this.index = index; - this.context = context; - this.currentFileInfo = currentFileInfo; +class functionCaller { + constructor(name, context, index, currentFileInfo) { + this.name = name.toLowerCase(); + this.index = index; + this.context = context; + this.currentFileInfo = currentFileInfo; - this.func = context.frames[0].functionRegistry.get(this.name); -}; -functionCaller.prototype.isValid = function() { - return Boolean(this.func); -}; + this.func = context.frames[0].functionRegistry.get(this.name); + } + + isValid() { + return Boolean(this.func); + } -functionCaller.prototype.call = function(args) { - // This code is terrible and should be replaced as per this issue... - // https://github.com/less/less.js/issues/2477 - if (Array.isArray(args)) { - args = args.filter(function (item) { - if (item.type === 'Comment') { - return false; - } - return true; - }) - .map(function(item) { - if (item.type === 'Expression') { - var subNodes = item.value.filter(function (item) { - if (item.type === 'Comment') { - return false; + call(args) { + // This code is terrible and should be replaced as per this issue... + // https://github.com/less/less.js/issues/2477 + if (Array.isArray(args)) { + args = args.filter(item => { + if (item.type === 'Comment') { + return false; + } + return true; + }) + .map(item => { + if (item.type === 'Expression') { + const subNodes = item.value.filter(item => { + if (item.type === 'Comment') { + return false; + } + return true; + }); + if (subNodes.length === 1) { + return subNodes[0]; + } else { + return new Expression(subNodes); } - return true; - }); - if (subNodes.length === 1) { - return subNodes[0]; - } else { - return new Expression(subNodes); } - } - return item; - }); - } + return item; + }); + } - return this.func.apply(this, args); -}; + return this.func(...args); + } +} -module.exports = functionCaller; +export default functionCaller; diff --git a/lib/less/functions/function-registry.js b/lib/less/functions/function-registry.js index d314355a4..912a5acb7 100644 --- a/lib/less/functions/function-registry.js +++ b/lib/less/functions/function-registry.js @@ -13,9 +13,9 @@ function makeRegistry( base ) { }, addMultiple: function(functions) { Object.keys(functions).forEach( - function(name) { + name => { this.add(name, functions[name]); - }.bind(this)); + }); }, get: function(name) { return this._data[name] || ( base && base.get( name )); @@ -32,4 +32,4 @@ function makeRegistry( base ) { }; } -module.exports = makeRegistry( null ); \ No newline at end of file +export default makeRegistry( null ); \ No newline at end of file diff --git a/lib/less/functions/index.js b/lib/less/functions/index.js index a9f8aaffa..260dd26af 100644 --- a/lib/less/functions/index.js +++ b/lib/less/functions/index.js @@ -1,5 +1,5 @@ -module.exports = function(environment) { - var functions = { +export default environment => { + const functions = { functionRegistry: require('./function-registry'), functionCaller: require('./function-caller') }; diff --git a/lib/less/functions/list.js b/lib/less/functions/list.js index 8c2523398..81959e681 100644 --- a/lib/less/functions/list.js +++ b/lib/less/functions/list.js @@ -1,17 +1,17 @@ -var Comment = require('../tree/comment'), - Dimension = require('../tree/dimension'), - Declaration = require('../tree/declaration'), - Expression = require('../tree/expression'), - Ruleset = require('../tree/ruleset'), - Selector = require('../tree/selector'), - Element = require('../tree/element'), - Quote = require('../tree/quoted'), - functionRegistry = require('./function-registry'); +import Comment from '../tree/comment'; +import Dimension from '../tree/dimension'; +import Declaration from '../tree/declaration'; +import Expression from '../tree/expression'; +import Ruleset from '../tree/ruleset'; +import Selector from '../tree/selector'; +import Element from '../tree/element'; +import Quote from '../tree/quoted'; +import functionRegistry from './function-registry'; -var getItemsFromNode = function(node) { +const getItemsFromNode = node => { // handle non-array values as an array of length 1 // return 'undefined' if index is invalid - var items = Array.isArray(node.value) ? + const items = Array.isArray(node.value) ? node.value : Array(node); return items; @@ -38,7 +38,10 @@ functionRegistry.addMultiple({ * @param {Dimension} [step=1] */ range: function(start, end, step) { - var from, to, stepValue = 1, list = []; + let from; + let to; + let stepValue = 1; + const list = []; if (end) { to = end; from = start.value; @@ -51,14 +54,16 @@ functionRegistry.addMultiple({ to = start; } - for (var i = from; i <= to.value; i += stepValue) { + for (let i = from; i <= to.value; i += stepValue) { list.push(new Dimension(i, to.unit)); } return new Expression(list); }, each: function(list, rs) { - var rules = [], newRules, iterator; + const rules = []; + let newRules; + let iterator; if (list.value && !(list instanceof Quote)) { if (Array.isArray(list.value)) { @@ -76,9 +81,9 @@ functionRegistry.addMultiple({ iterator = [list]; } - var valueName = '@value', - keyName = '@key', - indexName = '@index'; + let valueName = '@value'; + let keyName = '@key'; + let indexName = '@index'; if (rs.params) { valueName = rs.params[0] && rs.params[0].name; @@ -89,8 +94,10 @@ functionRegistry.addMultiple({ rs = rs.ruleset; } - for (var i = 0; i < iterator.length; i++) { - var key, value, item = iterator[i]; + for (let i = 0; i < iterator.length; i++) { + let key; + let value; + const item = iterator[i]; if (item instanceof Declaration) { key = typeof item.name === 'string' ? item.name : item.name[0].value; value = item.value; @@ -98,7 +105,7 @@ functionRegistry.addMultiple({ key = new Dimension(i + 1); value = item; } - + if (item instanceof Comment) { continue; } @@ -119,7 +126,7 @@ functionRegistry.addMultiple({ key, false, false, this.index, this.currentFileInfo)); } - + rules.push(new Ruleset([ new(Selector)([ new Element("", '&') ]) ], newRules, rs.strictImports, @@ -132,6 +139,5 @@ functionRegistry.addMultiple({ rs.strictImports, rs.visibilityInfo() ).eval(this.context); - } }); diff --git a/lib/less/functions/math-helper.js b/lib/less/functions/math-helper.js index 41b51295a..839339ab2 100644 --- a/lib/less/functions/math-helper.js +++ b/lib/less/functions/math-helper.js @@ -1,8 +1,8 @@ -var Dimension = require('../tree/dimension'); +import Dimension from '../tree/dimension'; -var MathHelper = function() { +const MathHelper = () => { }; -MathHelper._math = function (fn, unit, n) { +MathHelper._math = (fn, unit, n) => { if (!(n instanceof Dimension)) { throw { type: 'Argument', message: 'argument must be a number' }; } @@ -13,4 +13,4 @@ MathHelper._math = function (fn, unit, n) { } return new Dimension(fn(parseFloat(n.value)), unit); }; -module.exports = MathHelper; \ No newline at end of file +export default MathHelper; \ No newline at end of file diff --git a/lib/less/functions/math.js b/lib/less/functions/math.js index 31fc30abd..c741468ed 100644 --- a/lib/less/functions/math.js +++ b/lib/less/functions/math.js @@ -1,7 +1,7 @@ -var functionRegistry = require('./function-registry'), - mathHelper = require('./math-helper.js'); +import functionRegistry from './function-registry'; +import mathHelper from './math-helper.js'; -var mathFunctions = { +const mathFunctions = { // name, unit ceil: null, floor: null, @@ -15,15 +15,15 @@ var mathFunctions = { acos: 'rad' }; -for (var f in mathFunctions) { +for (const f in mathFunctions) { if (mathFunctions.hasOwnProperty(f)) { mathFunctions[f] = mathHelper._math.bind(null, Math[f], mathFunctions[f]); } } -mathFunctions.round = function (n, f) { - var fraction = typeof f === 'undefined' ? 0 : f.value; - return mathHelper._math(function(num) { return num.toFixed(fraction); }, null, n); +mathFunctions.round = (n, f) => { + const fraction = typeof f === 'undefined' ? 0 : f.value; + return mathHelper._math(num => num.toFixed(fraction), null, n); }; functionRegistry.addMultiple(mathFunctions); diff --git a/lib/less/functions/number.js b/lib/less/functions/number.js index fc085a91e..ece58412a 100644 --- a/lib/less/functions/number.js +++ b/lib/less/functions/number.js @@ -1,16 +1,26 @@ -var Dimension = require('../tree/dimension'), - Anonymous = require('../tree/anonymous'), - functionRegistry = require('./function-registry'), - mathHelper = require('./math-helper.js'); +import Dimension from '../tree/dimension'; +import Anonymous from '../tree/anonymous'; +import functionRegistry from './function-registry'; +import mathHelper from './math-helper.js'; -var minMax = function (isMin, args) { +const minMax = function (isMin, args) { args = Array.prototype.slice.call(args); switch (args.length) { case 0: throw { type: 'Argument', message: 'one or more arguments required' }; } - var i, j, current, currentUnified, referenceUnified, unit, unitStatic, unitClone, - order = [], // elems only contains original argument values. - values = {}; // key is the unit.toString() for unified Dimension values, + let i; // key is the unit.toString() for unified Dimension values, + let j; + let current; + let currentUnified; + let referenceUnified; + let unit; + let unitStatic; + let unitClone; + + const // elems only contains original argument values. + order = []; + + const values = {}; // value is the index into the order array. for (i = 0; i < args.length; i++) { current = args[i]; @@ -43,14 +53,14 @@ var minMax = function (isMin, args) { return order[0]; } args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', '); - return new Anonymous((isMin ? 'min' : 'max') + '(' + args + ')'); + return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`); }; functionRegistry.addMultiple({ - min: function () { - return minMax(true, arguments); + min: function(...args) { + return minMax(true, args); }, - max: function () { - return minMax(false, arguments); + max: function(...args) { + return minMax(false, args); }, convert: function (val, unit) { return val.convertTo(unit.value); @@ -72,9 +82,7 @@ functionRegistry.addMultiple({ return new Dimension(Math.pow(x.value, y.value), x.unit); }, percentage: function (n) { - var result = mathHelper._math(function(num) { - return num * 100; - }, '%', n); + const result = mathHelper._math(num => num * 100, '%', n); return result; } diff --git a/lib/less/functions/string.js b/lib/less/functions/string.js index a04311cc2..3942274ac 100644 --- a/lib/less/functions/string.js +++ b/lib/less/functions/string.js @@ -1,8 +1,8 @@ -var Quoted = require('../tree/quoted'), - Anonymous = require('../tree/anonymous'), - Quote = require('../tree/quoted'), - JavaScript = require('../tree/javascript'), - functionRegistry = require('./function-registry'); +import Quoted from '../tree/quoted'; +import Anonymous from '../tree/anonymous'; +import Quote from '../tree/quoted'; +import JavaScript from '../tree/javascript'; +import functionRegistry from './function-registry'; functionRegistry.addMultiple({ e: function (str) { @@ -14,20 +14,20 @@ functionRegistry.addMultiple({ .replace(/\(/g, '%28').replace(/\)/g, '%29')); }, replace: function (string, pattern, replacement, flags) { - var result = string.value; + let result = string.value; replacement = (replacement.type === 'Quoted') ? replacement.value : replacement.toCSS(); result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement); return new Quoted(string.quote || '', result, string.escaped); }, '%': function (string /* arg, arg, ... */) { - var args = Array.prototype.slice.call(arguments, 1), - result = string.value; + const args = Array.prototype.slice.call(arguments, 1); + let result = string.value; - for (var i = 0; i < args.length; i++) { + for (let i = 0; i < args.length; i++) { /* jshint loopfunc:true */ - result = result.replace(/%[sda]/i, function(token) { - var value = ((args[i].type === 'Quoted') && + result = result.replace(/%[sda]/i, token => { + const value = ((args[i].type === 'Quoted') && token.match(/s/i)) ? args[i].value : args[i].toCSS(); return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value; }); diff --git a/lib/less/functions/svg.js b/lib/less/functions/svg.js index 35df75a8c..ddda4535c 100644 --- a/lib/less/functions/svg.js +++ b/lib/less/functions/svg.js @@ -1,21 +1,24 @@ -module.exports = function(environment) { - var Dimension = require('../tree/dimension'), - Color = require('../tree/color'), - Expression = require('../tree/expression'), - Quoted = require('../tree/quoted'), - URL = require('../tree/url'), - functionRegistry = require('./function-registry'); +export default environment => { + const Dimension = require('../tree/dimension'); + const Color = require('../tree/color'); + const Expression = require('../tree/expression'); + const Quoted = require('../tree/quoted'); + const URL = require('../tree/url'); + const functionRegistry = require('./function-registry'); functionRegistry.add('svg-gradient', function(direction) { - - var stops, - gradientDirectionSvg, - gradientType = 'linear', - rectangleDimension = 'x="0" y="0" width="1" height="1"', - renderEnv = {compress: false}, - returner, - directionValue = direction.toCSS(renderEnv), - i, color, position, positionValue, alpha; + let stops; + let gradientDirectionSvg; + let gradientType = 'linear'; + let rectangleDimension = 'x="0" y="0" width="1" height="1"'; + const renderEnv = {compress: false}; + let returner; + const directionValue = direction.toCSS(renderEnv); + let i; + let color; + let position; + let positionValue; + let alpha; function throwArgumentDescriptor() { throw { type: 'Argument', @@ -57,8 +60,7 @@ module.exports = function(environment) { throw { type: 'Argument', message: 'svg-gradient direction must be \'to bottom\', \'to right\',' + ' \'to bottom right\', \'to top right\' or \'ellipse at center\'' }; } - returner = '' + - '<' + gradientType + 'Gradient id="g" ' + gradientDirectionSvg + '>'; + returner = `<${gradientType}Gradient id="g" ${gradientDirectionSvg}>`; for (i = 0; i < stops.length; i += 1) { if (stops[i] instanceof Expression) { @@ -74,14 +76,13 @@ module.exports = function(environment) { } positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%'; alpha = color.alpha; - returner += ''; + returner += ``; } - returner += '' + - ''; + returner += ``; returner = encodeURIComponent(returner); - returner = 'data:image/svg+xml,' + returner; - return new URL(new Quoted('\'' + returner + '\'', returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); + returner = `data:image/svg+xml,${returner}`; + return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); }); }; diff --git a/lib/less/functions/types.js b/lib/less/functions/types.js index 219bcf23e..c3a35c3a3 100644 --- a/lib/less/functions/types.js +++ b/lib/less/functions/types.js @@ -1,26 +1,24 @@ -var Keyword = require('../tree/keyword'), - DetachedRuleset = require('../tree/detached-ruleset'), - Dimension = require('../tree/dimension'), - Color = require('../tree/color'), - Quoted = require('../tree/quoted'), - Anonymous = require('../tree/anonymous'), - URL = require('../tree/url'), - Operation = require('../tree/operation'), - functionRegistry = require('./function-registry'); +import Keyword from '../tree/keyword'; +import DetachedRuleset from '../tree/detached-ruleset'; +import Dimension from '../tree/dimension'; +import Color from '../tree/color'; +import Quoted from '../tree/quoted'; +import Anonymous from '../tree/anonymous'; +import URL from '../tree/url'; +import Operation from '../tree/operation'; +import functionRegistry from './function-registry'; +const isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False; -var isa = function (n, Type) { - return (n instanceof Type) ? Keyword.True : Keyword.False; - }, - isunit = function (n, unit) { - if (unit === undefined) { - throw { type: 'Argument', message: 'missing the required second argument to isunit.' }; - } - unit = typeof unit.value === 'string' ? unit.value : unit; - if (typeof unit !== 'string') { - throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' }; - } - return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False; - }; +const isunit = (n, unit) => { + if (unit === undefined) { + throw { type: 'Argument', message: 'missing the required second argument to isunit.' }; + } + unit = typeof unit.value === 'string' ? unit.value : unit; + if (typeof unit !== 'string') { + throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' }; + } + return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False; +}; functionRegistry.addMultiple({ isruleset: function (n) { @@ -50,12 +48,11 @@ functionRegistry.addMultiple({ isem: function (n) { return isunit(n, 'em'); }, - isunit: isunit, + isunit, unit: function (val, unit) { if (!(val instanceof Dimension)) { throw { type: 'Argument', - message: 'the first argument to unit must be a number' + - (val instanceof Operation ? '. Have you forgotten parenthesis?' : '') }; + message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` }; } if (unit) { if (unit instanceof Keyword) { diff --git a/lib/less/import-manager.js b/lib/less/import-manager.js index b44f9a335..f055dbadc 100644 --- a/lib/less/import-manager.js +++ b/lib/less/import-manager.js @@ -1,12 +1,11 @@ -var contexts = require('./contexts'), - Parser = require('./parser/parser'), - LessError = require('./less-error'), - utils = require('./utils'), - PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise, - logger = require('./logger'); - -module.exports = function(environment) { - +import contexts from './contexts'; +import Parser from './parser/parser'; +import LessError from './less-error'; +import utils from './utils'; +const PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; +import logger from './logger'; + +export default environment => { // FileInfo = { // 'rewriteUrls' - option - whether to adjust URL's to be relative // 'filename' - full resolved filename of current file @@ -16,153 +15,156 @@ module.exports = function(environment) { // 'entryPath' - absolute path to the entry file // 'reference' - whether the file should not be output and only output parts that are referenced - var ImportManager = function(less, context, rootFileInfo) { - this.less = less; - this.rootFilename = rootFileInfo.filename; - this.paths = context.paths || []; // Search paths, when importing - this.contents = {}; // map - filename to contents of all the files - this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore - this.mime = context.mime; - this.error = null; - this.context = context; - // Deprecated? Unused outside of here, could be useful. - this.queue = []; // Files which haven't been imported yet - this.files = {}; // Holds the imported parse trees. - }; - - /** - * Add an import to be imported - * @param path - the raw path - * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension) - * @param currentFileInfo - the current file info (used for instance to work out relative paths) - * @param importOptions - import options - * @param callback - callback for when it is imported - */ - ImportManager.prototype.push = function (path, tryAppendExtension, currentFileInfo, importOptions, callback) { - var importManager = this, - pluginLoader = this.context.pluginManager.Loader; - - this.queue.push(path); - - var fileParsedFunc = function (e, root, fullPath) { - importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue - - var importedEqualsRoot = fullPath === importManager.rootFilename; - if (importOptions.optional && e) { - callback(null, {rules:[]}, false, null); - logger.info('The file ' + fullPath + ' was skipped because it was not found and the import was marked optional.'); - } - else { - // Inline imports aren't cached here. - // If we start to cache them, please make sure they won't conflict with non-inline imports of the - // same name as they used to do before this comment and the condition below have been added. - if (!importManager.files[fullPath] && !importOptions.inline) { - importManager.files[fullPath] = { root: root, options: importOptions }; - } - if (e && !importManager.error) { importManager.error = e; } - callback(e, root, importedEqualsRoot, fullPath); - } - }; - - var newFileInfo = { - rewriteUrls: this.context.rewriteUrls, - entryPath: currentFileInfo.entryPath, - rootpath: currentFileInfo.rootpath, - rootFilename: currentFileInfo.rootFilename - }; - - var fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment); - - if (!fileManager) { - fileParsedFunc({ message: 'Could not find a file-manager for ' + path }); - return; + class ImportManager { + constructor(less, context, rootFileInfo) { + this.less = less; + this.rootFilename = rootFileInfo.filename; + this.paths = context.paths || []; // Search paths, when importing + this.contents = {}; // map - filename to contents of all the files + this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore + this.mime = context.mime; + this.error = null; + this.context = context; + // Deprecated? Unused outside of here, could be useful. + this.queue = []; // Files which haven't been imported yet + this.files = {}; // Holds the imported parse trees. } - var loadFileCallback = function(loadedFile) { - var plugin, - resolvedFilename = loadedFile.filename, - contents = loadedFile.contents.replace(/^\uFEFF/, ''); - - // Pass on an updated rootpath if path of imported file is relative and file - // is in a (sub|sup) directory - // - // Examples: - // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/', - // then rootpath should become 'less/module/nav/' - // - If path of imported file is '../mixins.less' and rootpath is 'less/', - // then rootpath should become 'less/../' - newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename); - if (newFileInfo.rewriteUrls) { - newFileInfo.rootpath = fileManager.join( - (importManager.context.rootpath || ''), - fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath)); - - if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) { - newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath); + /** + * Add an import to be imported + * @param path - the raw path + * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension) + * @param currentFileInfo - the current file info (used for instance to work out relative paths) + * @param importOptions - import options + * @param callback - callback for when it is imported + */ + push(path, tryAppendExtension, currentFileInfo, importOptions, callback) { + const importManager = this; + const pluginLoader = this.context.pluginManager.Loader; + + this.queue.push(path); + + const fileParsedFunc = (e, root, fullPath) => { + importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue + + const importedEqualsRoot = fullPath === importManager.rootFilename; + if (importOptions.optional && e) { + callback(null, {rules:[]}, false, null); + logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`); } - } - newFileInfo.filename = resolvedFilename; + else { + // Inline imports aren't cached here. + // If we start to cache them, please make sure they won't conflict with non-inline imports of the + // same name as they used to do before this comment and the condition below have been added. + if (!importManager.files[fullPath] && !importOptions.inline) { + importManager.files[fullPath] = { root, options: importOptions }; + } + if (e && !importManager.error) { importManager.error = e; } + callback(e, root, importedEqualsRoot, fullPath); + } + }; - var newEnv = new contexts.Parse(importManager.context); + const newFileInfo = { + rewriteUrls: this.context.rewriteUrls, + entryPath: currentFileInfo.entryPath, + rootpath: currentFileInfo.rootpath, + rootFilename: currentFileInfo.rootFilename + }; - newEnv.processImports = false; - importManager.contents[resolvedFilename] = contents; + const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment); - if (currentFileInfo.reference || importOptions.reference) { - newFileInfo.reference = true; + if (!fileManager) { + fileParsedFunc({ message: `Could not find a file-manager for ${path}` }); + return; } - if (importOptions.isPlugin) { - plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo); - if (plugin instanceof LessError) { - fileParsedFunc(plugin, null, resolvedFilename); - } - else { - fileParsedFunc(null, plugin, resolvedFilename); + const loadFileCallback = loadedFile => { + let plugin; + const resolvedFilename = loadedFile.filename; + const contents = loadedFile.contents.replace(/^\uFEFF/, ''); + + // Pass on an updated rootpath if path of imported file is relative and file + // is in a (sub|sup) directory + // + // Examples: + // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/', + // then rootpath should become 'less/module/nav/' + // - If path of imported file is '../mixins.less' and rootpath is 'less/', + // then rootpath should become 'less/../' + newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename); + if (newFileInfo.rewriteUrls) { + newFileInfo.rootpath = fileManager.join( + (importManager.context.rootpath || ''), + fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath)); + + if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) { + newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath); + } } - } else if (importOptions.inline) { - fileParsedFunc(null, contents, resolvedFilename); - } else { + newFileInfo.filename = resolvedFilename; - // import (multiple) parse trees apparently get altered and can't be cached. - // TODO: investigate why this is - if (importManager.files[resolvedFilename] - && !importManager.files[resolvedFilename].options.multiple - && !importOptions.multiple) { + const newEnv = new contexts.Parse(importManager.context); - fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename); - } - else { - new Parser(newEnv, importManager, newFileInfo).parse(contents, function (e, root) { - fileParsedFunc(e, root, resolvedFilename); - }); + newEnv.processImports = false; + importManager.contents[resolvedFilename] = contents; + + if (currentFileInfo.reference || importOptions.reference) { + newFileInfo.reference = true; } - } - }; - var promise, context = utils.clone(this.context); - if (tryAppendExtension) { - context.ext = importOptions.isPlugin ? '.js' : '.less'; - } + if (importOptions.isPlugin) { + plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo); + if (plugin instanceof LessError) { + fileParsedFunc(plugin, null, resolvedFilename); + } + else { + fileParsedFunc(null, plugin, resolvedFilename); + } + } else if (importOptions.inline) { + fileParsedFunc(null, contents, resolvedFilename); + } else { - if (importOptions.isPlugin) { - context.mime = 'application/javascript'; - promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager); - } - else { - promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment, - function(err, loadedFile) { - if (err) { - fileParsedFunc(err); - } else { - loadFileCallback(loadedFile); + // import (multiple) parse trees apparently get altered and can't be cached. + // TODO: investigate why this is + if (importManager.files[resolvedFilename] + && !importManager.files[resolvedFilename].options.multiple + && !importOptions.multiple) { + + fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename); } - }); - } - if (promise) { - promise.then(loadFileCallback, fileParsedFunc); + else { + new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => { + fileParsedFunc(e, root, resolvedFilename); + }); + } + } + }; + let promise; + const context = utils.clone(this.context); + + if (tryAppendExtension) { + context.ext = importOptions.isPlugin ? '.js' : '.less'; + } + + if (importOptions.isPlugin) { + context.mime = 'application/javascript'; + promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager); + } + else { + promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment, + (err, loadedFile) => { + if (err) { + fileParsedFunc(err); + } else { + loadFileCallback(loadedFile); + } + }); + } + if (promise) { + promise.then(loadFileCallback, fileParsedFunc); + } } + } - }; return ImportManager; }; diff --git a/lib/less/index.js b/lib/less/index.js index b1b63f718..8d4dfbb3c 100644 --- a/lib/less/index.js +++ b/lib/less/index.js @@ -1,7 +1,11 @@ -module.exports = function(environment, fileManagers) { - var SourceMapOutput, SourceMapBuilder, ParseTree, ImportManager, Environment; +export default (environment, fileManagers) => { + let SourceMapOutput; + let SourceMapBuilder; + let ParseTree; + let ImportManager; + let Environment; - var initial = { + const initial = { version: [3, 9, 0], data: require('./data'), tree: require('./tree'), @@ -28,15 +32,14 @@ module.exports = function(environment, fileManagers) { // Create a public API - var ctor = function(t) { - return function() { - var obj = Object.create(t.prototype); - t.apply(obj, Array.prototype.slice.call(arguments, 0)); - return obj; - }; - }; - var t, api = Object.create(initial); - for (var n in initial.tree) { + const ctor = t => (function(...args) { + const obj = Object.create(t.prototype); + t.apply(obj, Array.prototype.slice.call(args, 0)); + return obj; + }); + let t; + const api = Object.create(initial); + for (const n in initial.tree) { /* eslint guard-for-in: 0 */ t = initial.tree[n]; if (typeof t === 'function') { @@ -44,7 +47,7 @@ module.exports = function(environment, fileManagers) { } else { api[n] = Object.create(null); - for (var o in t) { + for (const o in t) { /* eslint guard-for-in: 0 */ api[n][o.toLowerCase()] = ctor(t[o]); } diff --git a/lib/less/less-error.js b/lib/less/less-error.js index 151455026..252a2e3a3 100644 --- a/lib/less/less-error.js +++ b/lib/less/less-error.js @@ -1,4 +1,4 @@ -var utils = require('./utils'); +import utils from './utils'; /** * This is a centralized class of any error that could be thrown internally (mostly by the parser). * Besides standard .message it keeps some additional data like a path to the file where the error @@ -21,21 +21,21 @@ var utils = require('./utils'); * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager? * @param {string} [currentFilename] */ -var LessError = module.exports = function LessError(e, fileContentMap, currentFilename) { +const LessError = module.exports = function LessError(e, fileContentMap, currentFilename) { Error.call(this); - var filename = e.filename || currentFilename; + const filename = e.filename || currentFilename; this.message = e.message; this.stack = e.stack; if (fileContentMap && filename) { - var input = fileContentMap.contents[filename], - loc = utils.getLocation(e.index, input), - line = loc.line, - col = loc.column, - callLine = e.call && utils.getLocation(e.call, input).line, - lines = input ? input.split('\n') : ''; + const input = fileContentMap.contents[filename]; + const loc = utils.getLocation(e.index, input); + const line = loc.line; + const col = loc.column; + const callLine = e.call && utils.getLocation(e.call, input).line; + const lines = input ? input.split('\n') : ''; this.type = e.type || 'Syntax'; this.filename = filename; @@ -44,7 +44,7 @@ var LessError = module.exports = function LessError(e, fileContentMap, currentFi this.column = col; if (!this.line && this.stack) { - var found = this.stack.match(/(|Function):(\d+):(\d+)/); + const found = this.stack.match(/(|Function):(\d+):(\d+)/); if (found) { if (found[2]) { @@ -64,13 +64,12 @@ var LessError = module.exports = function LessError(e, fileContentMap, currentFi lines[this.line - 1], lines[this.line] ]; - } }; if (typeof Object.create === 'undefined') { - var F = function () {}; + const F = () => {}; F.prototype = Error.prototype; LessError.prototype = new F(); } else { @@ -86,28 +85,26 @@ LessError.prototype.constructor = LessError; * @param {Object} options * @returns {string} */ -LessError.prototype.toString = function(options) { - options = options || {}; - - var message = ''; - var extract = this.extract || []; - var error = []; - var stylize = function (str) { return str; }; +LessError.prototype.toString = function(options = {}) { + let message = ''; + const extract = this.extract || []; + let error = []; + let stylize = str => str; if (options.stylize) { - var type = typeof options.stylize; + const type = typeof options.stylize; if (type !== 'function') { - throw Error('options.stylize should be a function, got a ' + type + '!'); + throw Error(`options.stylize should be a function, got a ${type}!`); } stylize = options.stylize; } if (this.line !== null) { if (typeof extract[0] === 'string') { - error.push(stylize((this.line - 1) + ' ' + extract[0], 'grey')); + error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey')); } if (typeof extract[1] === 'string') { - var errorTxt = this.line + ' '; + let errorTxt = `${this.line} `; if (extract[1]) { errorTxt += extract[1].slice(0, this.column) + stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') + @@ -117,24 +114,24 @@ LessError.prototype.toString = function(options) { } if (typeof extract[2] === 'string') { - error.push(stylize((this.line + 1) + ' ' + extract[2], 'grey')); + error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey')); } - error = error.join('\n') + stylize('', 'reset') + '\n'; + error = `${error.join('\n') + stylize('', 'reset')}\n`; } - message += stylize(this.type + 'Error: ' + this.message, 'red'); + message += stylize(`${this.type}Error: ${this.message}`, 'red'); if (this.filename) { message += stylize(' in ', 'red') + this.filename; } if (this.line) { - message += stylize(' on line ' + this.line + ', column ' + (this.column + 1) + ':', 'grey'); + message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey'); } - message += '\n' + error; + message += `\n${error}`; if (this.callLine) { - message += stylize('from ', 'red') + (this.filename || '') + '/n'; - message += stylize(this.callLine, 'grey') + ' ' + this.callExtract + '/n'; + message += `${stylize('from ', 'red') + (this.filename || '')}/n`; + message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`; } return message; diff --git a/lib/less/logger.js b/lib/less/logger.js index 621e57e24..ea83d7fdc 100644 --- a/lib/less/logger.js +++ b/lib/less/logger.js @@ -1,4 +1,4 @@ -module.exports = { +export default { error: function(msg) { this._fireEvent('error', msg); }, @@ -15,7 +15,7 @@ module.exports = { this._listeners.push(listener); }, removeListener: function(listener) { - for (var i = 0; i < this._listeners.length; i++) { + for (let i = 0; i < this._listeners.length; i++) { if (this._listeners[i] === listener) { this._listeners.splice(i, 1); return; @@ -23,8 +23,8 @@ module.exports = { } }, _fireEvent: function(type, msg) { - for (var i = 0; i < this._listeners.length; i++) { - var logFunction = this._listeners[i][type]; + for (let i = 0; i < this._listeners.length; i++) { + const logFunction = this._listeners[i][type]; if (logFunction) { logFunction(msg); } diff --git a/lib/less/parse-tree.js b/lib/less/parse-tree.js index d601af987..ab9108b06 100644 --- a/lib/less/parse-tree.js +++ b/lib/less/parse-tree.js @@ -1,60 +1,65 @@ -var LessError = require('./less-error'), - transformTree = require('./transform-tree'), - logger = require('./logger'); - -module.exports = function(SourceMapBuilder) { - var ParseTree = function(root, imports) { - this.root = root; - this.imports = imports; - }; - - ParseTree.prototype.toCSS = function(options) { - var evaldRoot, result = {}, sourceMapBuilder; - try { - evaldRoot = transformTree(this.root, options); - } catch (e) { - throw new LessError(e, this.imports); +import LessError from './less-error'; +import transformTree from './transform-tree'; +import logger from './logger'; + +export default SourceMapBuilder => { + class ParseTree { + constructor(root, imports) { + this.root = root; + this.imports = imports; } - try { - var compress = Boolean(options.compress); - if (compress) { - logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); + toCSS(options) { + let evaldRoot; + const result = {}; + let sourceMapBuilder; + try { + evaldRoot = transformTree(this.root, options); + } catch (e) { + throw new LessError(e, this.imports); } - var toCSSOptions = { - compress: compress, - dumpLineNumbers: options.dumpLineNumbers, - strictUnits: Boolean(options.strictUnits), - numPrecision: 8}; + try { + const compress = Boolean(options.compress); + if (compress) { + logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); + } - if (options.sourceMap) { - sourceMapBuilder = new SourceMapBuilder(options.sourceMap); - result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports); - } else { - result.css = evaldRoot.toCSS(toCSSOptions); + const toCSSOptions = { + compress, + dumpLineNumbers: options.dumpLineNumbers, + strictUnits: Boolean(options.strictUnits), + numPrecision: 8}; + + if (options.sourceMap) { + sourceMapBuilder = new SourceMapBuilder(options.sourceMap); + result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports); + } else { + result.css = evaldRoot.toCSS(toCSSOptions); + } + } catch (e) { + throw new LessError(e, this.imports); } - } catch (e) { - throw new LessError(e, this.imports); - } - if (options.pluginManager) { - var postProcessors = options.pluginManager.getPostProcessors(); - for (var i = 0; i < postProcessors.length; i++) { - result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options: options, imports: this.imports }); + if (options.pluginManager) { + const postProcessors = options.pluginManager.getPostProcessors(); + for (let i = 0; i < postProcessors.length; i++) { + result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options, imports: this.imports }); + } + } + if (options.sourceMap) { + result.map = sourceMapBuilder.getExternalSourceMap(); } - } - if (options.sourceMap) { - result.map = sourceMapBuilder.getExternalSourceMap(); - } - result.imports = []; - for (var file in this.imports.files) { - if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) { - result.imports.push(file); + result.imports = []; + for (const file in this.imports.files) { + if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) { + result.imports.push(file); + } } + return result; } - return result; - }; + } + return ParseTree; }; diff --git a/lib/less/parse.js b/lib/less/parse.js index 623e70431..a64bf6ff5 100644 --- a/lib/less/parse.js +++ b/lib/less/parse.js @@ -1,12 +1,12 @@ -var PromiseConstructor, - contexts = require('./contexts'), - Parser = require('./parser/parser'), - PluginManager = require('./plugin-manager'), - LessError = require('./less-error'), - utils = require('./utils'); +let PromiseConstructor; +import contexts from './contexts'; +import Parser from './parser/parser'; +import PluginManager from './plugin-manager'; +import LessError from './less-error'; +import utils from './utils'; -module.exports = function(environment, ParseTree, ImportManager) { - var parse = function (input, options, callback) { +export default (environment, ParseTree, ImportManager) => { + const parse = function (input, options, callback) { if (typeof options === 'function') { callback = options; @@ -20,9 +20,9 @@ module.exports = function(environment, ParseTree, ImportManager) { if (!PromiseConstructor) { PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; } - var self = this; - return new PromiseConstructor(function (resolve, reject) { - parse.call(self, input, options, function(err, output) { + const self = this; + return new PromiseConstructor((resolve, reject) => { + parse.call(self, input, options, (err, output) => { if (err) { reject(err); } else { @@ -31,9 +31,9 @@ module.exports = function(environment, ParseTree, ImportManager) { }); }); } else { - var context, - rootFileInfo, - pluginManager = new PluginManager(this, !options.reUsePluginManager); + let context; + let rootFileInfo; + const pluginManager = new PluginManager(this, !options.reUsePluginManager); options.pluginManager = pluginManager; @@ -42,14 +42,14 @@ module.exports = function(environment, ParseTree, ImportManager) { if (options.rootFileInfo) { rootFileInfo = options.rootFileInfo; } else { - var filename = options.filename || 'input'; - var entryPath = filename.replace(/[^\/\\]*$/, ''); + const filename = options.filename || 'input'; + const entryPath = filename.replace(/[^\/\\]*$/, ''); rootFileInfo = { - filename: filename, + filename, rewriteUrls: context.rewriteUrls, rootpath: context.rootpath || '', currentDirectory: entryPath, - entryPath: entryPath, + entryPath, rootFilename: filename }; // add in a missing trailing slash @@ -58,15 +58,16 @@ module.exports = function(environment, ParseTree, ImportManager) { } } - var imports = new ImportManager(this, context, rootFileInfo); + const imports = new ImportManager(this, context, rootFileInfo); this.importManager = imports; // TODO: allow the plugins to be just a list of paths or names // Do an async plugin queue like lessc if (options.plugins) { - options.plugins.forEach(function(plugin) { - var evalResult, contents; + options.plugins.forEach(plugin => { + let evalResult; + let contents; if (plugin.fileContent) { contents = plugin.fileContent.replace(/^\uFEFF/, ''); evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename); @@ -81,7 +82,7 @@ module.exports = function(environment, ParseTree, ImportManager) { } new Parser(context, imports, rootFileInfo) - .parse(input, function (e, root) { + .parse(input, (e, root) => { if (e) { return callback(e); } callback(null, root, imports, options); }, options); diff --git a/lib/less/parser/chunker.js b/lib/less/parser/chunker.js index 6a674758f..9c35f3f5a 100644 --- a/lib/less/parser/chunker.js +++ b/lib/less/parser/chunker.js @@ -1,12 +1,22 @@ // Split the input into chunks. -module.exports = function (input, fail) { - var len = input.length, level = 0, parenLevel = 0, - lastOpening, lastOpeningParen, lastMultiComment, lastMultiCommentEndBrace, - chunks = [], emitFrom = 0, - chunkerCurrentIndex, currentChunkStartIndex, cc, cc2, matched; +export default (input, fail) => { + const len = input.length; + let level = 0; + let parenLevel = 0; + let lastOpening; + let lastOpeningParen; + let lastMultiComment; + let lastMultiCommentEndBrace; + const chunks = []; + let emitFrom = 0; + let chunkerCurrentIndex; + let currentChunkStartIndex; + let cc; + let cc2; + let matched; function emitChunk(force) { - var len = chunkerCurrentIndex - emitFrom; + const len = chunkerCurrentIndex - emitFrom; if (((len < 512) && !force) || !len) { return; } @@ -64,7 +74,7 @@ module.exports = function (input, fail) { } } if (matched) { continue; } - return fail('unmatched `' + String.fromCharCode(cc) + '`', currentChunkStartIndex); + return fail(`unmatched \`${String.fromCharCode(cc)}\``, currentChunkStartIndex); case 47: // /, check for comment if (parenLevel || (chunkerCurrentIndex == len - 1)) { continue; } cc2 = input.charCodeAt(chunkerCurrentIndex + 1); diff --git a/lib/less/parser/parser-input.js b/lib/less/parser/parser-input.js index 436fd0448..a284b81b8 100644 --- a/lib/less/parser/parser-input.js +++ b/lib/less/parser/parser-input.js @@ -1,32 +1,50 @@ -var chunker = require('./chunker'); - -module.exports = function() { - var input, // Less input string - j, // current chunk - saveStack = [], // holds state for backtracking - furthest, // furthest index the parser has gone to - furthestPossibleErrorMessage, // if this is furthest we got to, this is the probably cause - chunks, // chunkified input - current, // current chunk - currentPos, // index of current chunk, in `input` - parserInput = {}; - - var CHARCODE_SPACE = 32, - CHARCODE_TAB = 9, - CHARCODE_LF = 10, - CHARCODE_CR = 13, - CHARCODE_PLUS = 43, - CHARCODE_COMMA = 44, - CHARCODE_FORWARD_SLASH = 47, - CHARCODE_9 = 57; +import chunker from './chunker'; + +export default () => { + let // Less input string + input; + + let // current chunk + j; + + const // holds state for backtracking + saveStack = []; + + let // furthest index the parser has gone to + furthest; + + let // if this is furthest we got to, this is the probably cause + furthestPossibleErrorMessage; + + let // chunkified input + chunks; + + let // current chunk + current; + + let // index of current chunk, in `input` + currentPos; + + const parserInput = {}; + const CHARCODE_SPACE = 32; + const CHARCODE_TAB = 9; + const CHARCODE_LF = 10; + const CHARCODE_CR = 13; + const CHARCODE_PLUS = 43; + const CHARCODE_COMMA = 44; + const CHARCODE_FORWARD_SLASH = 47; + const CHARCODE_9 = 57; function skipWhitespace(length) { - var oldi = parserInput.i, oldj = j, - curr = parserInput.i - currentPos, - endIndex = parserInput.i + current.length - curr, - mem = (parserInput.i += length), - inp = input, - c, nextChar, comment; + const oldi = parserInput.i; + const oldj = j; + const curr = parserInput.i - currentPos; + const endIndex = parserInput.i + current.length - curr; + const mem = (parserInput.i += length); + const inp = input; + let c; + let nextChar; + let comment; for (; parserInput.i < endIndex; parserInput.i++) { c = inp.charCodeAt(parserInput.i); @@ -35,7 +53,7 @@ module.exports = function() { nextChar = inp.charAt(parserInput.i + 1); if (nextChar === '/') { comment = {index: parserInput.i, isLineComment: true}; - var nextNewLine = inp.indexOf('\n', parserInput.i + 2); + let nextNewLine = inp.indexOf('\n', parserInput.i + 2); if (nextNewLine < 0) { nextNewLine = endIndex; } @@ -44,7 +62,7 @@ module.exports = function() { parserInput.commentStore.push(comment); continue; } else if (nextChar === '*') { - var nextStarSlash = inp.indexOf('*/', parserInput.i + 2); + const nextStarSlash = inp.indexOf('*/', parserInput.i + 2); if (nextStarSlash >= 0) { comment = { index: parserInput.i, @@ -79,38 +97,38 @@ module.exports = function() { return oldi !== parserInput.i || oldj !== j; } - parserInput.save = function() { + parserInput.save = () => { currentPos = parserInput.i; - saveStack.push( { current: current, i: parserInput.i, j: j }); + saveStack.push( { current, i: parserInput.i, j }); }; - parserInput.restore = function(possibleErrorMessage) { + parserInput.restore = possibleErrorMessage => { if (parserInput.i > furthest || (parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage)) { furthest = parserInput.i; furthestPossibleErrorMessage = possibleErrorMessage; } - var state = saveStack.pop(); + const state = saveStack.pop(); current = state.current; currentPos = parserInput.i = state.i; j = state.j; }; - parserInput.forget = function() { + parserInput.forget = () => { saveStack.pop(); }; - parserInput.isWhitespace = function (offset) { - var pos = parserInput.i + (offset || 0), - code = input.charCodeAt(pos); + parserInput.isWhitespace = offset => { + const pos = parserInput.i + (offset || 0); + const code = input.charCodeAt(pos); return (code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF); }; // Specialization of $(tok) - parserInput.$re = function(tok) { + parserInput.$re = tok => { if (parserInput.i > currentPos) { current = current.slice(parserInput.i - currentPos); currentPos = parserInput.i; } - var m = tok.exec(current); + const m = tok.exec(current); if (!m) { return null; } @@ -123,7 +141,7 @@ module.exports = function() { return m.length === 1 ? m[0] : m; }; - parserInput.$char = function(tok) { + parserInput.$char = tok => { if (input.charAt(parserInput.i) !== tok) { return null; } @@ -131,11 +149,11 @@ module.exports = function() { return tok; }; - parserInput.$str = function(tok) { - var tokLength = tok.length; + parserInput.$str = tok => { + const tokLength = tok.length; // https://jsperf.com/string-startswith/21 - for (var i = 0; i < tokLength; i++) { + for (let i = 0; i < tokLength; i++) { if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { return null; } @@ -145,18 +163,18 @@ module.exports = function() { return tok; }; - parserInput.$quoted = function(loc) { - var pos = loc || parserInput.i, - startChar = input.charAt(pos); + parserInput.$quoted = loc => { + const pos = loc || parserInput.i; + const startChar = input.charAt(pos); if (startChar !== '\'' && startChar !== '"') { return; } - var length = input.length, - currentPosition = pos; + const length = input.length; + const currentPosition = pos; - for (var i = 1; i + currentPosition < length; i++) { - var nextChar = input.charAt(i + currentPosition); + for (let i = 1; i + currentPosition < length; i++) { + const nextChar = input.charAt(i + currentPosition); switch (nextChar) { case '\\': i++; @@ -165,7 +183,7 @@ module.exports = function() { case '\n': break; case startChar: - var str = input.substr(currentPosition, i + 1); + const str = input.substr(currentPosition, i + 1); if (!loc && loc !== 0) { skipWhitespace(i + 1); return str @@ -181,32 +199,29 @@ module.exports = function() { * Permissive parsing. Ignores everything except matching {} [] () and quotes * until matching token (outside of blocks) */ - parserInput.$parseUntil = function(tok) { - var quote = '', - returnVal = null, - inComment = false, - blockDepth = 0, - blockStack = [], - parseGroups = [], - length = input.length, - startPos = parserInput.i, - lastPos = parserInput.i, - i = parserInput.i, - loop = true, - testChar; + parserInput.$parseUntil = tok => { + let quote = ''; + let returnVal = null; + let inComment = false; + let blockDepth = 0; + const blockStack = []; + const parseGroups = []; + const length = input.length; + const startPos = parserInput.i; + let lastPos = parserInput.i; + let i = parserInput.i; + let loop = true; + let testChar; if (typeof tok === 'string') { - testChar = function(char) { - return char === tok; - } + testChar = char => char === tok } else { - testChar = function(char) { - return tok.test(char); - } + testChar = char => tok.test(char) } do { - var prevChar, nextChar = input.charAt(i); + let prevChar; + let nextChar = input.charAt(i); if (blockDepth === 0 && testChar(nextChar)) { returnVal = input.substr(lastPos, i - lastPos); if (returnVal) { @@ -272,7 +287,7 @@ module.exports = function() { case '}': case ')': case ']': - var expected = blockStack.pop(); + const expected = blockStack.pop(); if (nextChar === expected) { blockDepth--; } else { @@ -299,10 +314,10 @@ module.exports = function() { // Same as $(), but don't change the state of the parser, // just return the match. - parserInput.peek = function(tok) { + parserInput.peek = tok => { if (typeof tok === 'string') { // https://jsperf.com/string-startswith/21 - for (var i = 0; i < tok.length; i++) { + for (let i = 0; i < tok.length; i++) { if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { return false; } @@ -315,29 +330,21 @@ module.exports = function() { // Specialization of peek() // TODO remove or change some currentChar calls to peekChar - parserInput.peekChar = function(tok) { - return input.charAt(parserInput.i) === tok; - }; + parserInput.peekChar = tok => input.charAt(parserInput.i) === tok; - parserInput.currentChar = function() { - return input.charAt(parserInput.i); - }; + parserInput.currentChar = () => input.charAt(parserInput.i); - parserInput.prevChar = function() { - return input.charAt(parserInput.i - 1); - }; + parserInput.prevChar = () => input.charAt(parserInput.i - 1); - parserInput.getInput = function() { - return input; - }; + parserInput.getInput = () => input; - parserInput.peekNotNumeric = function() { - var c = input.charCodeAt(parserInput.i); + parserInput.peekNotNumeric = () => { + const c = input.charCodeAt(parserInput.i); // Is the first char of the dimension 0-9, '.', '+' or '-' return (c > CHARCODE_9 || c < CHARCODE_PLUS) || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA; }; - parserInput.start = function(str, chunkInput, failFunction) { + parserInput.start = (str, chunkInput, failFunction) => { input = str; parserInput.i = j = currentPos = furthest = 0; @@ -362,16 +369,16 @@ module.exports = function() { skipWhitespace(0); }; - parserInput.end = function() { - var message, - isFinished = parserInput.i >= input.length; + parserInput.end = () => { + let message; + const isFinished = parserInput.i >= input.length; if (parserInput.i < furthest) { message = furthestPossibleErrorMessage; parserInput.i = furthest; } return { - isFinished: isFinished, + isFinished, furthest: parserInput.i, furthestPossibleErrorMessage: message, furthestReachedEnd: parserInput.i >= input.length - 1, diff --git a/lib/less/parser/parser.js b/lib/less/parser/parser.js index 1faa1116a..52338bc50 100644 --- a/lib/less/parser/parser.js +++ b/lib/less/parser/parser.js @@ -1,9 +1,9 @@ -var LessError = require('../less-error'), - tree = require('../tree'), - visitors = require('../visitors'), - getParserInput = require('./parser-input'), - utils = require('../utils'), - functionRegistry = require('../functions/function-registry'); +import LessError from '../less-error'; +import tree from '../tree'; +import visitors from '../visitors'; +import getParserInput from './parser-input'; +import utils from '../utils'; +import functionRegistry from '../functions/function-registry'; // // less.js - parser @@ -38,9 +38,9 @@ var LessError = require('../less-error'), // It also takes care of moving all the indices forwards. // -var Parser = function Parser(context, imports, fileInfo) { - var parsers, - parserInput = getParserInput(); +const Parser = function Parser(context, imports, fileInfo) { + let parsers; + const parserInput = getParserInput(); function error(msg, type) { throw new LessError( @@ -56,13 +56,13 @@ var Parser = function Parser(context, imports, fileInfo) { function expect(arg, msg) { // some older browsers return typeof 'function' for RegExp - var result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg); + const result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg); if (result) { return result; } error(msg || (typeof arg === 'string' - ? 'expected \'' + arg + '\' got \'' + parserInput.currentChar() + '\'' + ? `expected '${arg}' got '${parserInput.currentChar()}'` : 'unexpected token')); } @@ -71,11 +71,11 @@ var Parser = function Parser(context, imports, fileInfo) { if (parserInput.$char(arg)) { return arg; } - error(msg || 'expected \'' + arg + '\' got \'' + parserInput.currentChar() + '\''); + error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`); } function getDebugInfo(index) { - var filename = fileInfo.filename; + const filename = fileInfo.filename; return { lineNumber: utils.getLocation(index, parserInput.getInput()).line + 1, @@ -92,8 +92,9 @@ var Parser = function Parser(context, imports, fileInfo) { * @param {Object} fileInfo - fileInfo to attach to created nodes */ function parseNode(str, parseList, currentIndex, fileInfo, callback) { - var result, returnNodes = []; - var parser = parserInput; + let result; + const returnNodes = []; + const parser = parserInput; try { parser.start(str, false, function fail(msg, index) { @@ -102,7 +103,7 @@ var Parser = function Parser(context, imports, fileInfo) { index: index + currentIndex }); }); - for (var x = 0, p, i; (p = parseList[x]); x++) { + for (let x = 0, p, i; (p = parseList[x]); x++) { i = parser.i; result = parsers[p](); if (result) { @@ -115,7 +116,7 @@ var Parser = function Parser(context, imports, fileInfo) { } } - var endInfo = parser.end(); + const endInfo = parser.end(); if (endInfo.isFinished) { callback(null, returnNodes); } @@ -129,15 +130,15 @@ var Parser = function Parser(context, imports, fileInfo) { }, imports, fileInfo.filename); } } - + // // The Parser // return { - parserInput: parserInput, - imports: imports, - fileInfo: fileInfo, - parseNode: parseNode, + parserInput, + imports, + fileInfo, + parseNode, // // Parse an input string into an abstract syntax tree, // @param str A string containing 'less' markup @@ -145,15 +146,20 @@ var Parser = function Parser(context, imports, fileInfo) { // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply // parse: function (str, callback, additionalData) { - var root, error = null, globalVars, modifyVars, ignored, preText = ''; + let root; + let error = null; + let globalVars; + let modifyVars; + let ignored; + let preText = ''; - globalVars = (additionalData && additionalData.globalVars) ? Parser.serializeVars(additionalData.globalVars) + '\n' : ''; - modifyVars = (additionalData && additionalData.modifyVars) ? '\n' + Parser.serializeVars(additionalData.modifyVars) : ''; + globalVars = (additionalData && additionalData.globalVars) ? `${Parser.serializeVars(additionalData.globalVars)}\n` : ''; + modifyVars = (additionalData && additionalData.modifyVars) ? `\n${Parser.serializeVars(additionalData.modifyVars)}` : ''; if (context.pluginManager) { - var preProcessors = context.pluginManager.getPreProcessors(); - for (var i = 0; i < preProcessors.length; i++) { - str = preProcessors[i].process(str, { context: context, imports: imports, fileInfo: fileInfo }); + const preProcessors = context.pluginManager.getPreProcessors(); + for (let i = 0; i < preProcessors.length; i++) { + str = preProcessors[i].process(str, { context, imports, fileInfo }); } } @@ -176,7 +182,7 @@ var Parser = function Parser(context, imports, fileInfo) { try { parserInput.start(str, context.chunkInput, function fail(msg, index) { throw new LessError({ - index: index, + index, type: 'Parse', message: msg, filename: fileInfo.filename @@ -202,10 +208,10 @@ var Parser = function Parser(context, imports, fileInfo) { // showing the line where the parse error occurred. // We split it up into two parts (the part which parsed, // and the part which didn't), so we can color them differently. - var endInfo = parserInput.end(); + const endInfo = parserInput.end(); if (!endInfo.isFinished) { - var message = endInfo.furthestPossibleErrorMessage; + let message = endInfo.furthestPossibleErrorMessage; if (!message) { message = 'Unrecognised input'; @@ -220,13 +226,13 @@ var Parser = function Parser(context, imports, fileInfo) { error = new LessError({ type: 'Parse', - message: message, + message, index: endInfo.furthest, filename: fileInfo.filename }, imports); } - var finish = function (e) { + const finish = e => { e = error || e || imports.error; if (e) { @@ -295,7 +301,9 @@ var Parser = function Parser(context, imports, fileInfo) { // block rule: at the root level. // primary: function () { - var mixin = this.mixin, root = [], node; + const mixin = this.mixin; + let root = []; + let node; while (true) { while (true) { @@ -322,7 +330,7 @@ var Parser = function Parser(context, imports, fileInfo) { if (node) { root.push(node); } else { - var foundSemiColon = false; + let foundSemiColon = false; while (parserInput.$char(';')) { foundSemiColon = true; } @@ -339,7 +347,7 @@ var Parser = function Parser(context, imports, fileInfo) { // where the current structure allows it comment: function () { if (parserInput.commentStore.length) { - var comment = parserInput.commentStore.shift(); + const comment = parserInput.commentStore.shift(); return new(tree.Comment)(comment.text, comment.isLineComment, comment.index, fileInfo); } }, @@ -357,7 +365,9 @@ var Parser = function Parser(context, imports, fileInfo) { // "milky way" 'he\'s the one!' // quoted: function (forceEscaped) { - var str, index = parserInput.i, isEscaped = false; + let str; + const index = parserInput.i; + let isEscaped = false; parserInput.save(); if (parserInput.$char('~')) { @@ -383,7 +393,7 @@ var Parser = function Parser(context, imports, fileInfo) { // black border-collapse // keyword: function () { - var k = parserInput.$char('%') || parserInput.$re(/^\[?(?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\]?/); + const k = parserInput.$char('%') || parserInput.$re(/^\[?(?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\]?/); if (k) { return tree.Color.fromKeyword(k) || new(tree.Keyword)(k); } @@ -397,7 +407,10 @@ var Parser = function Parser(context, imports, fileInfo) { // The arguments are parsed with the `entities.arguments` parser. // call: function () { - var name, args, func, index = parserInput.i; + let name; + let args; + let func; + const index = parserInput.i; // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 if (parserInput.peek(/^url\(/i)) { @@ -430,7 +443,7 @@ var Parser = function Parser(context, imports, fileInfo) { } parserInput.forget(); - + return new(tree.Call)(name, args, index, fileInfo); }, @@ -455,8 +468,8 @@ var Parser = function Parser(context, imports, fileInfo) { function f(parse, stop) { return { - parse: parse, // parsing function - stop: stop // when true - stop after parse() and return its result, + parse, // parsing function + stop // when true - stop after parse() and return its result, // otherwise continue for plain args }; } @@ -467,9 +480,10 @@ var Parser = function Parser(context, imports, fileInfo) { }, arguments: function (prevArgs) { - var argsComma = prevArgs || [], - argsSemiColon = [], - isSemiColonSeparated, value; + let argsComma = prevArgs || []; + const argsSemiColon = []; + let isSemiColonSeparated; + let value; parserInput.save(); @@ -519,7 +533,8 @@ var Parser = function Parser(context, imports, fileInfo) { // assignment: function () { - var key, value; + let key; + let value; parserInput.save(); key = parserInput.$re(/^\w+(?=\s?=)/i); if (!key) { @@ -547,7 +562,8 @@ var Parser = function Parser(context, imports, fileInfo) { // to be enclosed within a string, so it can't be parsed as an Expression. // url: function () { - var value, index = parserInput.i; + let value; + const index = parserInput.i; parserInput.autoCommentAbsorb = false; @@ -578,14 +594,16 @@ var Parser = function Parser(context, imports, fileInfo) { // see `parsers.variable`. // variable: function () { - var ch, name, index = parserInput.i; + let ch; + let name; + const index = parserInput.i; parserInput.save(); if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\w-]+/))) { ch = parserInput.currentChar(); if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\s/)) { // this may be a VariableCall lookup - var result = parsers.variableCall(name); + const result = parsers.variableCall(name); if (result) { parserInput.forget(); return result; @@ -599,10 +617,11 @@ var Parser = function Parser(context, imports, fileInfo) { // A variable entity using the protective {} e.g. @{var} variableCurly: function () { - var curly, index = parserInput.i; + let curly; + const index = parserInput.i; if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\{([\w-]+)\}/))) { - return new(tree.Variable)('@' + curly[1], index, fileInfo); + return new(tree.Variable)(`@${curly[1]}`, index, fileInfo); } }, // @@ -611,7 +630,8 @@ var Parser = function Parser(context, imports, fileInfo) { // background-color: $color // property: function () { - var name, index = parserInput.i; + let name; + const index = parserInput.i; if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\$[\w-]+/))) { return new(tree.Property)(name, index, fileInfo); @@ -620,10 +640,11 @@ var Parser = function Parser(context, imports, fileInfo) { // A property entity useing the protective {} e.g. ${prop} propertyCurly: function () { - var curly, index = parserInput.i; + let curly; + const index = parserInput.i; if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\$\{([\w-]+)\}/))) { - return new(tree.Property)('$' + curly[1], index, fileInfo); + return new(tree.Property)(`$${curly[1]}`, index, fileInfo); } }, // @@ -634,7 +655,7 @@ var Parser = function Parser(context, imports, fileInfo) { // `rgb` and `hsl` colors are parsed through the `entities.call` parser. // color: function () { - var rgb; + let rgb; parserInput.save(); if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\w.#\[])?/))) { @@ -648,16 +669,16 @@ var Parser = function Parser(context, imports, fileInfo) { colorKeyword: function () { parserInput.save(); - var autoCommentAbsorb = parserInput.autoCommentAbsorb; + const autoCommentAbsorb = parserInput.autoCommentAbsorb; parserInput.autoCommentAbsorb = false; - var k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/); + const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/); parserInput.autoCommentAbsorb = autoCommentAbsorb; if (!k) { parserInput.forget(); return; } parserInput.restore(); - var color = tree.Color.fromKeyword(k); + const color = tree.Color.fromKeyword(k); if (color) { parserInput.$str(k); return color; @@ -674,7 +695,7 @@ var Parser = function Parser(context, imports, fileInfo) { return; } - var value = parserInput.$re(/^([+-]?\d*\.?\d+)(%|[a-z_]+)?/i); + const value = parserInput.$re(/^([+-]?\d*\.?\d+)(%|[a-z_]+)?/i); if (value) { return new(tree.Dimension)(value[1], value[2]); } @@ -686,7 +707,7 @@ var Parser = function Parser(context, imports, fileInfo) { // U+0?? or U+00A1-00A9 // unicodeDescriptor: function () { - var ud; + let ud; ud = parserInput.$re(/^U\+[0-9a-fA-F?]+(\-[0-9a-fA-F?]+)?/); if (ud) { @@ -700,12 +721,13 @@ var Parser = function Parser(context, imports, fileInfo) { // `window.location.href` // javascript: function () { - var js, index = parserInput.i; + let js; + const index = parserInput.i; parserInput.save(); - var escape = parserInput.$char('~'); - var jsQuote = parserInput.$char('`'); + const escape = parserInput.$char('~'); + const jsQuote = parserInput.$char('`'); if (!jsQuote) { parserInput.restore(); @@ -727,7 +749,7 @@ var Parser = function Parser(context, imports, fileInfo) { // @fink: // variable: function () { - var name; + let name; if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\w-]+)\s*:/))) { return name[1]; } }, @@ -741,8 +763,11 @@ var Parser = function Parser(context, imports, fileInfo) { // color: @fink[@color]; // variableCall: function (parsedName) { - var lookups, important, i = parserInput.i, - inValue = !!parsedName, name = parsedName; + let lookups; + let important; + const i = parserInput.i; + const inValue = !!parsedName; + let name = parsedName; parserInput.save(); @@ -764,7 +789,7 @@ var Parser = function Parser(context, imports, fileInfo) { important = true; } - var call = new tree.VariableCall(name, i, fileInfo); + const call = new tree.VariableCall(name, i, fileInfo); if (!inValue && parsers.end()) { parserInput.forget(); return call; @@ -782,7 +807,12 @@ var Parser = function Parser(context, imports, fileInfo) { // extend syntax - used to extend selectors // extend: function(isRule) { - var elements, e, index = parserInput.i, option, extendList, extend; + let elements; + let e; + const index = parserInput.i; + let option; + let extendList; + let extend; if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) { return; @@ -852,8 +882,13 @@ var Parser = function Parser(context, imports, fileInfo) { // selector for now. // call: function (inValue, getLookup) { - var s = parserInput.currentChar(), important = false, lookups, - index = parserInput.i, elements, args, hasParens; + const s = parserInput.currentChar(); + let important = false; + let lookups; + const index = parserInput.i; + let elements; + let args; + let hasParens; if (s !== '.' && s !== '#') { return; } @@ -888,7 +923,7 @@ var Parser = function Parser(context, imports, fileInfo) { if (inValue || parsers.end()) { parserInput.forget(); - var mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important); + const mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important); if (lookups) { return new tree.NamespaceValue(mixin, lookups, important); } @@ -905,8 +940,12 @@ var Parser = function Parser(context, imports, fileInfo) { * (Start with . or # and can have > ) */ elements: function() { - var elements, e, c, elem, elemIndex, - re = /^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/; + let elements; + let e; + let c; + let elem; + let elemIndex; + const re = /^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/; while (true) { elemIndex = parserInput.i; e = parserInput.$re(re); @@ -925,11 +964,19 @@ var Parser = function Parser(context, imports, fileInfo) { return elements; }, args: function (isCall) { - var entities = parsers.entities, - returner = { args:null, variadic: false }, - expressions = [], argsSemiColon = [], argsComma = [], - isSemiColonSeparated, expressionContainsNamed, name, nameLoop, - value, arg, expand, hasSep = true; + const entities = parsers.entities; + const returner = { args:null, variadic: false }; + let expressions = []; + const argsSemiColon = []; + const argsComma = []; + let isSemiColonSeparated; + let expressionContainsNamed; + let name; + let nameLoop; + let value; + let arg; + let expand; + let hasSep = true; parserInput.save(); @@ -959,7 +1006,7 @@ var Parser = function Parser(context, imports, fileInfo) { arg.throwAwayComments(); } value = arg; - var val = null; + let val = null; if (isCall) { // Variable @@ -1013,7 +1060,7 @@ var Parser = function Parser(context, imports, fileInfo) { expressions.push(value); } - argsComma.push({ name:nameLoop, value:value, expand:expand }); + argsComma.push({ name:nameLoop, value, expand }); if (parserInput.$char(',')) { hasSep = true; @@ -1032,7 +1079,7 @@ var Parser = function Parser(context, imports, fileInfo) { if (expressions.length > 1) { value = new(tree.Value)(expressions); } - argsSemiColon.push({ name:name, value:value, expand:expand }); + argsSemiColon.push({ name, value, expand }); name = null; expressions = []; @@ -1064,7 +1111,12 @@ var Parser = function Parser(context, imports, fileInfo) { // the `{...}` block. // definition: function () { - var name, params = [], match, ruleset, cond, variadic = false; + let name; + let params = []; + let match; + let ruleset; + let cond; + let variadic = false; if ((parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#') || parserInput.peek(/^[^{]*\}/)) { return; @@ -1076,7 +1128,7 @@ var Parser = function Parser(context, imports, fileInfo) { if (match) { name = match[1]; - var argInfo = this.args(false); + const argInfo = this.args(false); params = argInfo.args; variadic = argInfo.variadic; @@ -1110,12 +1162,14 @@ var Parser = function Parser(context, imports, fileInfo) { }, ruleLookups: function() { - var rule, args, lookups = []; + let rule; + let args; + const lookups = []; if (parserInput.currentChar() !== '[') { return; } - + while (true) { parserInput.save(); args = null; @@ -1140,7 +1194,7 @@ var Parser = function Parser(context, imports, fileInfo) { return; } - var name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/); + const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/); if (!parserInput.$char(']')) { parserInput.restore(); @@ -1160,7 +1214,7 @@ var Parser = function Parser(context, imports, fileInfo) { // and can be found inside a rule's value. // entity: function () { - var entities = this.entities; + const entities = this.entities; return this.comment() || entities.literal() || entities.variable() || entities.url() || entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) || @@ -1182,17 +1236,17 @@ var Parser = function Parser(context, imports, fileInfo) { // alpha(opacity=88) // ieAlpha: function () { - var value; + let value; // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 if (!parserInput.$re(/^opacity=/i)) { return; } value = parserInput.$re(/^\d+/); if (!value) { value = expect(parsers.entities.variable, 'Could not parse alpha'); - value = '@{' + value.name.slice(1) + '}'; + value = `@{${value.name.slice(1)}}`; } expectChar(')'); - return new tree.Quoted('', 'alpha(opacity=' + value + ')'); + return new tree.Quoted('', `alpha(opacity=${value})`); }, // @@ -1208,7 +1262,10 @@ var Parser = function Parser(context, imports, fileInfo) { // and an element name, such as a tag a class, or `*`. // element: function () { - var e, c, v, index = parserInput.i; + let e; + let c; + let v; + const index = parserInput.i; c = this.combinator(); @@ -1245,11 +1302,11 @@ var Parser = function Parser(context, imports, fileInfo) { // we deal with this in *combinator.js*. // combinator: function () { - var c = parserInput.currentChar(); + let c = parserInput.currentChar(); if (c === '/') { parserInput.save(); - var slashedCombinator = parserInput.$re(/^\/[a-z]+\//i); + const slashedCombinator = parserInput.$re(/^\/[a-z]+\//i); if (slashedCombinator) { parserInput.forget(); return new(tree.Combinator)(slashedCombinator); @@ -1281,7 +1338,14 @@ var Parser = function Parser(context, imports, fileInfo) { // Selectors are made out of one or more Elements, see above. // selector: function (isLess) { - var index = parserInput.i, elements, extendList, c, e, allExtends, when, condition; + const index = parserInput.i; + let elements; + let extendList; + let c; + let e; + let allExtends; + let when; + let condition; isLess = isLess !== false; while ((isLess && (extendList = this.extend())) || (isLess && (when = parserInput.$str('when'))) || (e = this.element())) { if (when) { @@ -1313,7 +1377,8 @@ var Parser = function Parser(context, imports, fileInfo) { if (allExtends) { error('Extend must be used to extend a selector, it cannot be used on its own'); } }, selectors: function () { - var s, selectors; + let s; + let selectors; while (true) { s = this.selector(); if (!s) { @@ -1339,8 +1404,10 @@ var Parser = function Parser(context, imports, fileInfo) { attribute: function () { if (!parserInput.$char('[')) { return; } - var entities = this.entities, - key, val, op; + const entities = this.entities; + let key; + let val; + let op; if (!(key = entities.variableCurly())) { key = expect(/^(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\.)+/); @@ -1361,14 +1428,14 @@ var Parser = function Parser(context, imports, fileInfo) { // It's a wrapper around the `primary` rule, with added `{}`. // block: function () { - var content; + let content; if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) { return content; } }, blockRuleset: function() { - var block = this.block(); + let block = this.block(); if (block) { block = new tree.Ruleset(null, block); @@ -1377,7 +1444,9 @@ var Parser = function Parser(context, imports, fileInfo) { }, detachedRuleset: function() { - var argInfo, params, variadic; + let argInfo; + let params; + let variadic; parserInput.save(); if (parserInput.$re(/^[.#]\(/)) { @@ -1395,7 +1464,7 @@ var Parser = function Parser(context, imports, fileInfo) { return; } } - var blockRuleset = this.blockRuleset(); + const blockRuleset = this.blockRuleset(); if (blockRuleset) { parserInput.forget(); if (params) { @@ -1410,7 +1479,9 @@ var Parser = function Parser(context, imports, fileInfo) { // div, .class, body > p {...} // ruleset: function () { - var selectors, rules, debugInfo; + let selectors; + let rules; + let debugInfo; parserInput.save(); @@ -1422,7 +1493,7 @@ var Parser = function Parser(context, imports, fileInfo) { if (selectors && (rules = this.block())) { parserInput.forget(); - var ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports); + const ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports); if (context.dumpLineNumbers) { ruleset.debugInfo = debugInfo; } @@ -1432,8 +1503,14 @@ var Parser = function Parser(context, imports, fileInfo) { } }, declaration: function () { - var name, value, index = parserInput.i, hasDR, - c = parserInput.currentChar(), important, merge, isVariable; + let name; + let value; + const index = parserInput.i; + let hasDR; + const c = parserInput.currentChar(); + let important; + let merge; + let isVariable; if (c === '.' || c === '#' || c === '&' || c === ':') { return; } @@ -1496,8 +1573,8 @@ var Parser = function Parser(context, imports, fileInfo) { } }, anonymousValue: function () { - var index = parserInput.i; - var match = parserInput.$re(/^([^.#@\$+\/'"*`(;{}-]*);/); + const index = parserInput.i; + const match = parserInput.$re(/^([^.#@\$+\/'"*`(;{}-]*);/); if (match) { return new(tree.Anonymous)(match[1], index); } @@ -1512,12 +1589,16 @@ var Parser = function Parser(context, imports, fileInfo) { * math is allowed. */ permissiveValue: function (untilTokens) { - var i, e, done, value, - tok = untilTokens || ';', - index = parserInput.i, result = []; + let i; + let e; + let done; + let value; + const tok = untilTokens || ';'; + const index = parserInput.i; + const result = []; function testCurrentChar() { - var char = parserInput.currentChar(); + const char = parserInput.currentChar(); if (typeof tok === 'string') { return char === tok; } else { @@ -1541,7 +1622,7 @@ var Parser = function Parser(context, imports, fileInfo) { } while (e); done = testCurrentChar(); - + if (value.length > 0) { value = new(tree.Expression)(value); if (done) { @@ -1556,18 +1637,18 @@ var Parser = function Parser(context, imports, fileInfo) { } } parserInput.save(); - + value = parserInput.$parseUntil(tok); if (value) { if (typeof value === 'string') { - error('Expected \'' + value + '\'', 'Parse'); + error(`Expected '${value}'`, 'Parse'); } if (value.length === 1 && value[0] === ' ') { parserInput.forget(); return new tree.Anonymous('', index); } - var item; + let item; for (i = 0; i < value.length; i++) { item = value[i]; if (Array.isArray(item)) { @@ -1579,7 +1660,7 @@ var Parser = function Parser(context, imports, fileInfo) { item = item.trim(); } // Treat like quoted values, but replace vars like unquoted expressions - var quote = new tree.Quoted('\'', item, true, index, fileInfo); + const quote = new tree.Quoted('\'', item, true, index, fileInfo); quote.variableRegex = /@([\w-]+)/g; quote.propRegex = /\$([\w-]+)/g; result.push(quote); @@ -1602,12 +1683,14 @@ var Parser = function Parser(context, imports, fileInfo) { // stored in `import`, which we pass to the Import constructor. // 'import': function () { - var path, features, index = parserInput.i; + let path; + let features; + const index = parserInput.i; - var dir = parserInput.$re(/^@import?\s+/); + const dir = parserInput.$re(/^@import?\s+/); if (dir) { - var options = (dir ? this.importOptions() : null) || {}; + const options = (dir ? this.importOptions() : null) || {}; if ((path = this.entities.quoted() || this.entities.url())) { features = this.mediaFeatures(); @@ -1627,7 +1710,10 @@ var Parser = function Parser(context, imports, fileInfo) { }, importOptions: function() { - var o, options = {}, optionName, value; + let o; + const options = {}; + let optionName; + let value; // list of options, surrounded by parens if (!parserInput.$char('(')) { return null; } @@ -1655,14 +1741,17 @@ var Parser = function Parser(context, imports, fileInfo) { }, importOption: function() { - var opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/); + const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/); if (opt) { return opt[1]; } }, mediaFeature: function () { - var entities = this.entities, nodes = [], e, p; + const entities = this.entities; + const nodes = []; + let e; + let p; parserInput.save(); do { e = entities.keyword() || entities.variable() || entities.mixinLookup(); @@ -1692,7 +1781,9 @@ var Parser = function Parser(context, imports, fileInfo) { }, mediaFeatures: function () { - var entities = this.entities, features = [], e; + const entities = this.entities; + const features = []; + let e; do { e = this.mediaFeature(); if (e) { @@ -1711,7 +1802,11 @@ var Parser = function Parser(context, imports, fileInfo) { }, media: function () { - var features, rules, media, debugInfo, index = parserInput.i; + let features; + let rules; + let media; + let debugInfo; + const index = parserInput.i; if (context.dumpLineNumbers) { debugInfo = getDebugInfo(index); @@ -1748,9 +1843,11 @@ var Parser = function Parser(context, imports, fileInfo) { // @plugin (args) "lib"; // plugin: function () { - var path, args, options, - index = parserInput.i, - dir = parserInput.$re(/^@plugin?\s+/); + let path; + let args; + let options; + const index = parserInput.i; + const dir = parserInput.$re(/^@plugin?\s+/); if (dir) { args = this.pluginArgs(); @@ -1787,7 +1884,7 @@ var Parser = function Parser(context, imports, fileInfo) { parserInput.restore(); return null; } - var args = parserInput.$re(/^\s*([^\);]+)\)\s*/); + const args = parserInput.$re(/^\s*([^\);]+)\)\s*/); if (args[1]) { parserInput.forget(); return args[1].trim(); @@ -1804,8 +1901,16 @@ var Parser = function Parser(context, imports, fileInfo) { // @charset "utf-8"; // atrule: function () { - var index = parserInput.i, name, value, rules, nonVendorSpecificName, - hasIdentifier, hasExpression, hasUnknown, hasBlock = true, isRooted = true; + const index = parserInput.i; + let name; + let value; + let rules; + let nonVendorSpecificName; + let hasIdentifier; + let hasExpression; + let hasUnknown; + let hasBlock = true; + let isRooted = true; if (parserInput.currentChar() !== '@') { return; } @@ -1822,7 +1927,7 @@ var Parser = function Parser(context, imports, fileInfo) { nonVendorSpecificName = name; if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) { - nonVendorSpecificName = '@' + name.slice(name.indexOf('-', 2) + 1); + nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`; } switch (nonVendorSpecificName) { @@ -1853,19 +1958,19 @@ var Parser = function Parser(context, imports, fileInfo) { if (hasIdentifier) { value = this.entity(); if (!value) { - error('expected ' + name + ' identifier'); + error(`expected ${name} identifier`); } } else if (hasExpression) { value = this.expression(); if (!value) { - error('expected ' + name + ' expression'); + error(`expected ${name} expression`); } } else if (hasUnknown) { value = this.permissiveValue(/^[{;]/); hasBlock = (parserInput.currentChar() === '{'); if (!value) { if (!hasBlock && parserInput.currentChar() !== ';') { - error(name + ' rule is missing block or ending semi-colon'); + error(`${name} rule is missing block or ending semi-colon`); } } else if (!value.value) { @@ -1897,7 +2002,9 @@ var Parser = function Parser(context, imports, fileInfo) { // and before the `;`. // value: function () { - var e, expressions = [], index = parserInput.i; + let e; + const expressions = []; + const index = parserInput.i; do { e = this.expression(); @@ -1917,7 +2024,8 @@ var Parser = function Parser(context, imports, fileInfo) { } }, sub: function () { - var a, e; + let a; + let e; parserInput.save(); if (parserInput.$char('(')) { @@ -1934,7 +2042,11 @@ var Parser = function Parser(context, imports, fileInfo) { parserInput.restore(); }, multiplication: function () { - var m, a, op, operation, isSpaced; + let m; + let a; + let op; + let operation; + let isSpaced; m = this.operand(); if (m) { isSpaced = parserInput.isWhitespace(-1); @@ -1963,7 +2075,11 @@ var Parser = function Parser(context, imports, fileInfo) { } }, addition: function () { - var m, a, op, operation, isSpaced; + let m; + let a; + let op; + let operation; + let isSpaced; m = this.multiplication(); if (m) { isSpaced = parserInput.isWhitespace(-1); @@ -1986,7 +2102,10 @@ var Parser = function Parser(context, imports, fileInfo) { } }, conditions: function () { - var a, b, index = parserInput.i, condition; + let a; + let b; + const index = parserInput.i; + let condition; a = this.condition(true); if (a) { @@ -2004,7 +2123,9 @@ var Parser = function Parser(context, imports, fileInfo) { } }, condition: function (needsParens) { - var result, logical, next; + let result; + let logical; + let next; function or() { return parserInput.$str('or'); } @@ -2025,9 +2146,12 @@ var Parser = function Parser(context, imports, fileInfo) { return result; }, conditionAnd: function (needsParens) { - var result, logical, next, self = this; + let result; + let logical; + let next; + const self = this; function insideCondition() { - var cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens); + const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens); if (!cond && !needsParens) { return self.atomicCondition(needsParens); } @@ -2054,7 +2178,7 @@ var Parser = function Parser(context, imports, fileInfo) { }, negatedCondition: function (needsParens) { if (parserInput.$str('not')) { - var result = this.parenthesisCondition(needsParens); + const result = this.parenthesisCondition(needsParens); if (result) { result.negate = !result.negate; } @@ -2063,7 +2187,7 @@ var Parser = function Parser(context, imports, fileInfo) { }, parenthesisCondition: function (needsParens) { function tryConditionFollowedByParenthesis(me) { - var body; + let body; parserInput.save(); body = me.condition(needsParens); if (!body) { @@ -2078,7 +2202,7 @@ var Parser = function Parser(context, imports, fileInfo) { return body; } - var body; + let body; parserInput.save(); if (!parserInput.$str('(')) { parserInput.restore(); @@ -2096,14 +2220,19 @@ var Parser = function Parser(context, imports, fileInfo) { return ; } if (!parserInput.$char(')')) { - parserInput.restore('expected \')\' got \'' + parserInput.currentChar() + '\''); + parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`); return ; } parserInput.forget(); return body; }, atomicCondition: function (needsParens) { - var entities = this.entities, index = parserInput.i, a, b, c, op; + const entities = this.entities; + const index = parserInput.i; + let a; + let b; + let c; + let op; function cond() { return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup(); @@ -2154,13 +2283,14 @@ var Parser = function Parser(context, imports, fileInfo) { // such as a Color, or a Variable // operand: function () { - var entities = this.entities, negate; + const entities = this.entities; + let negate; if (parserInput.peek(/^-[@\$\(]/)) { negate = parserInput.$char('-'); } - var o = this.sub() || entities.dimension() || + let o = this.sub() || entities.dimension() || entities.color() || entities.variable() || entities.property() || entities.call() || entities.quoted(true) || entities.colorKeyword() || @@ -2182,7 +2312,10 @@ var Parser = function Parser(context, imports, fileInfo) { // @var * 2 // expression: function () { - var entities = [], e, delim, index = parserInput.i; + const entities = []; + let e; + let delim; + const index = parserInput.i; do { e = this.comment(); @@ -2207,17 +2340,20 @@ var Parser = function Parser(context, imports, fileInfo) { } }, property: function () { - var name = parserInput.$re(/^(\*?-?[_a-zA-Z0-9-]+)\s*:/); + const name = parserInput.$re(/^(\*?-?[_a-zA-Z0-9-]+)\s*:/); if (name) { return name[1]; } }, ruleProperty: function () { - var name = [], index = [], s, k; + let name = []; + const index = []; + let s; + let k; parserInput.save(); - var simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\s*:/); + const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\s*:/); if (simpleProperty) { name = [new(tree.Keyword)(simpleProperty[1])]; parserInput.forget(); @@ -2225,8 +2361,8 @@ var Parser = function Parser(context, imports, fileInfo) { } function match(re) { - var i = parserInput.i, - chunk = parserInput.$re(re); + const i = parserInput.i; + const chunk = parserInput.$re(re); if (chunk) { index.push(i); return name.push(chunk[1]); @@ -2254,8 +2390,8 @@ var Parser = function Parser(context, imports, fileInfo) { name[k] = (s.charAt(0) !== '@' && s.charAt(0) !== '$') ? new(tree.Keyword)(s) : (s.charAt(0) === '@' ? - new(tree.Variable)('@' + s.slice(2, -1), index[k], fileInfo) : - new(tree.Property)('$' + s.slice(2, -1), index[k], fileInfo)); + new(tree.Variable)(`@${s.slice(2, -1)}`, index[k], fileInfo) : + new(tree.Property)(`$${s.slice(2, -1)}`, index[k], fileInfo)); } return name; } @@ -2264,18 +2400,17 @@ var Parser = function Parser(context, imports, fileInfo) { } }; }; -Parser.serializeVars = function(vars) { - var s = ''; +Parser.serializeVars = vars => { + let s = ''; - for (var name in vars) { + for (const name in vars) { if (Object.hasOwnProperty.call(vars, name)) { - var value = vars[name]; - s += ((name[0] === '@') ? '' : '@') + name + ': ' + value + - ((String(value).slice(-1) === ';') ? '' : ';'); + const value = vars[name]; + s += `${((name[0] === '@') ? '' : '@') + name}: ${value}${(String(value).slice(-1) === ';') ? '' : ';'}`; } } return s; }; -module.exports = Parser; +export default Parser; diff --git a/lib/less/plugin-manager.js b/lib/less/plugin-manager.js index 7431c5b1f..486115378 100644 --- a/lib/less/plugin-manager.js +++ b/lib/less/plugin-manager.js @@ -1,155 +1,168 @@ /** * Plugin Manager */ -var PluginManager = function(less) { - this.less = less; - this.visitors = []; - this.preProcessors = []; - this.postProcessors = []; - this.installedPlugins = []; - this.fileManagers = []; - this.iterator = -1; - this.pluginCache = {}; - this.Loader = new less.PluginLoader(less); -}; +class PluginManager { + constructor(less) { + this.less = less; + this.visitors = []; + this.preProcessors = []; + this.postProcessors = []; + this.installedPlugins = []; + this.fileManagers = []; + this.iterator = -1; + this.pluginCache = {}; + this.Loader = new less.PluginLoader(less); + } -var pm, PluginManagerFactory = function(less, newFactory) { - if (newFactory || !pm) { - pm = new PluginManager(less); + /** + * Adds all the plugins in the array + * @param {Array} plugins + */ + addPlugins(plugins) { + if (plugins) { + for (let i = 0; i < plugins.length; i++) { + this.addPlugin(plugins[i]); + } } - return pm; - }; + } -/** - * Adds all the plugins in the array - * @param {Array} plugins - */ -PluginManager.prototype.addPlugins = function(plugins) { - if (plugins) { - for (var i = 0; i < plugins.length; i++) { - this.addPlugin(plugins[i]); + /** + * + * @param plugin + * @param {String} filename + */ + addPlugin(plugin, filename, functionRegistry) { + this.installedPlugins.push(plugin); + if (filename) { + this.pluginCache[filename] = plugin; + } + if (plugin.install) { + plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry); } } -}; -/** - * - * @param plugin - * @param {String} filename - */ -PluginManager.prototype.addPlugin = function(plugin, filename, functionRegistry) { - this.installedPlugins.push(plugin); - if (filename) { - this.pluginCache[filename] = plugin; + + /** + * + * @param filename + */ + get(filename) { + return this.pluginCache[filename]; } - if (plugin.install) { - plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry); + + /** + * Adds a visitor. The visitor object has options on itself to determine + * when it should run. + * @param visitor + */ + addVisitor(visitor) { + this.visitors.push(visitor); } -}; -/** - * - * @param filename - */ -PluginManager.prototype.get = function(filename) { - return this.pluginCache[filename]; -}; -/** - * Adds a visitor. The visitor object has options on itself to determine - * when it should run. - * @param visitor - */ -PluginManager.prototype.addVisitor = function(visitor) { - this.visitors.push(visitor); -}; -/** - * Adds a pre processor object - * @param {object} preProcessor - * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import - */ -PluginManager.prototype.addPreProcessor = function(preProcessor, priority) { - var indexToInsertAt; - for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) { - if (this.preProcessors[indexToInsertAt].priority >= priority) { - break; + /** + * Adds a pre processor object + * @param {object} preProcessor + * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import + */ + addPreProcessor(preProcessor, priority) { + let indexToInsertAt; + for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) { + if (this.preProcessors[indexToInsertAt].priority >= priority) { + break; + } } + this.preProcessors.splice(indexToInsertAt, 0, {preProcessor, priority}); } - this.preProcessors.splice(indexToInsertAt, 0, {preProcessor: preProcessor, priority: priority}); -}; -/** - * Adds a post processor object - * @param {object} postProcessor - * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression - */ -PluginManager.prototype.addPostProcessor = function(postProcessor, priority) { - var indexToInsertAt; - for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) { - if (this.postProcessors[indexToInsertAt].priority >= priority) { - break; + + /** + * Adds a post processor object + * @param {object} postProcessor + * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression + */ + addPostProcessor(postProcessor, priority) { + let indexToInsertAt; + for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) { + if (this.postProcessors[indexToInsertAt].priority >= priority) { + break; + } } + this.postProcessors.splice(indexToInsertAt, 0, {postProcessor, priority}); } - this.postProcessors.splice(indexToInsertAt, 0, {postProcessor: postProcessor, priority: priority}); -}; -/** - * - * @param manager - */ -PluginManager.prototype.addFileManager = function(manager) { - this.fileManagers.push(manager); -}; -/** - * - * @returns {Array} - * @private - */ -PluginManager.prototype.getPreProcessors = function() { - var preProcessors = []; - for (var i = 0; i < this.preProcessors.length; i++) { - preProcessors.push(this.preProcessors[i].preProcessor); + + /** + * + * @param manager + */ + addFileManager(manager) { + this.fileManagers.push(manager); } - return preProcessors; -}; -/** - * - * @returns {Array} - * @private - */ -PluginManager.prototype.getPostProcessors = function() { - var postProcessors = []; - for (var i = 0; i < this.postProcessors.length; i++) { - postProcessors.push(this.postProcessors[i].postProcessor); + + /** + * + * @returns {Array} + * @private + */ + getPreProcessors() { + const preProcessors = []; + for (let i = 0; i < this.preProcessors.length; i++) { + preProcessors.push(this.preProcessors[i].preProcessor); + } + return preProcessors; + } + + /** + * + * @returns {Array} + * @private + */ + getPostProcessors() { + const postProcessors = []; + for (let i = 0; i < this.postProcessors.length; i++) { + postProcessors.push(this.postProcessors[i].postProcessor); + } + return postProcessors; } - return postProcessors; -}; -/** - * - * @returns {Array} - * @private - */ -PluginManager.prototype.getVisitors = function() { - return this.visitors; -}; -PluginManager.prototype.visitor = function() { - var self = this; - return { - first: function() { - self.iterator = -1; - return self.visitors[self.iterator]; - }, - get: function() { - self.iterator += 1; - return self.visitors[self.iterator]; + /** + * + * @returns {Array} + * @private + */ + getVisitors() { + return this.visitors; + } + + visitor() { + const self = this; + return { + first: function() { + self.iterator = -1; + return self.visitors[self.iterator]; + }, + get: function() { + self.iterator += 1; + return self.visitors[self.iterator]; + } + }; + } + + /** + * + * @returns {Array} + * @private + */ + getFileManagers() { + return this.fileManagers; + } +} + +let pm; + +const PluginManagerFactory = (less, newFactory) => { + if (newFactory || !pm) { + pm = new PluginManager(less); } + return pm; }; -}; -/** - * - * @returns {Array} - * @private - */ -PluginManager.prototype.getFileManagers = function() { - return this.fileManagers; -}; // -module.exports = PluginManagerFactory; +export default PluginManagerFactory; diff --git a/lib/less/render.js b/lib/less/render.js index 8ea6f9eaa..55c3adcbd 100644 --- a/lib/less/render.js +++ b/lib/less/render.js @@ -1,8 +1,8 @@ -var PromiseConstructor, - utils = require('./utils'); +let PromiseConstructor; +import utils from './utils'; -module.exports = function(environment, ParseTree, ImportManager) { - var render = function (input, options, callback) { +export default (environment, ParseTree, ImportManager) => { + const render = function (input, options, callback) { if (typeof options === 'function') { callback = options; options = utils.copyOptions(this.options, {}); @@ -15,9 +15,9 @@ module.exports = function(environment, ParseTree, ImportManager) { if (!PromiseConstructor) { PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; } - var self = this; - return new PromiseConstructor(function (resolve, reject) { - render.call(self, input, options, function(err, output) { + const self = this; + return new PromiseConstructor((resolve, reject) => { + render.call(self, input, options, (err, output) => { if (err) { reject(err); } else { @@ -26,12 +26,12 @@ module.exports = function(environment, ParseTree, ImportManager) { }); }); } else { - this.parse(input, options, function(err, root, imports, options) { + this.parse(input, options, (err, root, imports, options) => { if (err) { return callback(err); } - var result; + let result; try { - var parseTree = new ParseTree(root, imports); + const parseTree = new ParseTree(root, imports); result = parseTree.toCSS(options); } catch (err) { return callback(err); } diff --git a/lib/less/source-map-builder.js b/lib/less/source-map-builder.js index 140396768..be798eb00 100644 --- a/lib/less/source-map-builder.js +++ b/lib/less/source-map-builder.js @@ -1,72 +1,77 @@ -module.exports = function (SourceMapOutput, environment) { +export default (SourceMapOutput, environment) => { + class SourceMapBuilder { + constructor(options) { + this.options = options; + } - var SourceMapBuilder = function (options) { - this.options = options; - }; + toCSS(rootNode, options, imports) { + const sourceMapOutput = new SourceMapOutput( + { + contentsIgnoredCharsMap: imports.contentsIgnoredChars, + rootNode, + contentsMap: imports.contents, + sourceMapFilename: this.options.sourceMapFilename, + sourceMapURL: this.options.sourceMapURL, + outputFilename: this.options.sourceMapOutputFilename, + sourceMapBasepath: this.options.sourceMapBasepath, + sourceMapRootpath: this.options.sourceMapRootpath, + outputSourceFiles: this.options.outputSourceFiles, + sourceMapGenerator: this.options.sourceMapGenerator, + sourceMapFileInline: this.options.sourceMapFileInline + }); - SourceMapBuilder.prototype.toCSS = function(rootNode, options, imports) { - var sourceMapOutput = new SourceMapOutput( - { - contentsIgnoredCharsMap: imports.contentsIgnoredChars, - rootNode: rootNode, - contentsMap: imports.contents, - sourceMapFilename: this.options.sourceMapFilename, - sourceMapURL: this.options.sourceMapURL, - outputFilename: this.options.sourceMapOutputFilename, - sourceMapBasepath: this.options.sourceMapBasepath, - sourceMapRootpath: this.options.sourceMapRootpath, - outputSourceFiles: this.options.outputSourceFiles, - sourceMapGenerator: this.options.sourceMapGenerator, - sourceMapFileInline: this.options.sourceMapFileInline - }); + const css = sourceMapOutput.toCSS(options); + this.sourceMap = sourceMapOutput.sourceMap; + this.sourceMapURL = sourceMapOutput.sourceMapURL; + if (this.options.sourceMapInputFilename) { + this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename); + } + if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) { + this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL); + } + return css + this.getCSSAppendage(); + } + + getCSSAppendage() { + + let sourceMapURL = this.sourceMapURL; + if (this.options.sourceMapFileInline) { + if (this.sourceMap === undefined) { + return ''; + } + sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`; + } - var css = sourceMapOutput.toCSS(options); - this.sourceMap = sourceMapOutput.sourceMap; - this.sourceMapURL = sourceMapOutput.sourceMapURL; - if (this.options.sourceMapInputFilename) { - this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename); + if (sourceMapURL) { + return `/*# sourceMappingURL=${sourceMapURL} */`; + } + return ''; } - if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) { - this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL); + + getExternalSourceMap() { + return this.sourceMap; } - return css + this.getCSSAppendage(); - }; - SourceMapBuilder.prototype.getCSSAppendage = function() { + setExternalSourceMap(sourceMap) { + this.sourceMap = sourceMap; + } - var sourceMapURL = this.sourceMapURL; - if (this.options.sourceMapFileInline) { - if (this.sourceMap === undefined) { - return ''; - } - sourceMapURL = 'data:application/json;base64,' + environment.encodeBase64(this.sourceMap); + isInline() { + return this.options.sourceMapFileInline; } - if (sourceMapURL) { - return '/*# sourceMappingURL=' + sourceMapURL + ' */'; + getSourceMapURL() { + return this.sourceMapURL; } - return ''; - }; - SourceMapBuilder.prototype.getExternalSourceMap = function() { - return this.sourceMap; - }; - SourceMapBuilder.prototype.setExternalSourceMap = function(sourceMap) { - this.sourceMap = sourceMap; - }; + getOutputFilename() { + return this.options.sourceMapOutputFilename; + } - SourceMapBuilder.prototype.isInline = function() { - return this.options.sourceMapFileInline; - }; - SourceMapBuilder.prototype.getSourceMapURL = function() { - return this.sourceMapURL; - }; - SourceMapBuilder.prototype.getOutputFilename = function() { - return this.options.sourceMapOutputFilename; - }; - SourceMapBuilder.prototype.getInputFilename = function() { - return this.sourceMapInputFilename; - }; + getInputFilename() { + return this.sourceMapInputFilename; + } + } return SourceMapBuilder; }; diff --git a/lib/less/source-map-output.js b/lib/less/source-map-output.js index 8659535e7..d30966e8e 100644 --- a/lib/less/source-map-output.js +++ b/lib/less/source-map-output.js @@ -1,149 +1,149 @@ -module.exports = function (environment) { - - var SourceMapOutput = function (options) { - this._css = []; - this._rootNode = options.rootNode; - this._contentsMap = options.contentsMap; - this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap; - if (options.sourceMapFilename) { - this._sourceMapFilename = options.sourceMapFilename.replace(/\\/g, '/'); - } - this._outputFilename = options.outputFilename; - this.sourceMapURL = options.sourceMapURL; - if (options.sourceMapBasepath) { - this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\/g, '/'); - } - if (options.sourceMapRootpath) { - this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\/g, '/'); - if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') { - this._sourceMapRootpath += '/'; +export default environment => { + class SourceMapOutput { + constructor(options) { + this._css = []; + this._rootNode = options.rootNode; + this._contentsMap = options.contentsMap; + this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap; + if (options.sourceMapFilename) { + this._sourceMapFilename = options.sourceMapFilename.replace(/\\/g, '/'); } - } else { - this._sourceMapRootpath = ''; - } - this._outputSourceFiles = options.outputSourceFiles; - this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator(); - - this._lineNumber = 0; - this._column = 0; - }; - - SourceMapOutput.prototype.removeBasepath = function(path) { - if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) { - path = path.substring(this._sourceMapBasepath.length); - if (path.charAt(0) === '\\' || path.charAt(0) === '/') { - path = path.substring(1); + this._outputFilename = options.outputFilename; + this.sourceMapURL = options.sourceMapURL; + if (options.sourceMapBasepath) { + this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\/g, '/'); } - } - - return path; - }; + if (options.sourceMapRootpath) { + this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\/g, '/'); + if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') { + this._sourceMapRootpath += '/'; + } + } else { + this._sourceMapRootpath = ''; + } + this._outputSourceFiles = options.outputSourceFiles; + this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator(); - SourceMapOutput.prototype.normalizeFilename = function(filename) { - filename = filename.replace(/\\/g, '/'); - filename = this.removeBasepath(filename); - return (this._sourceMapRootpath || '') + filename; - }; + this._lineNumber = 0; + this._column = 0; + } - SourceMapOutput.prototype.add = function(chunk, fileInfo, index, mapLines) { + removeBasepath(path) { + if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) { + path = path.substring(this._sourceMapBasepath.length); + if (path.charAt(0) === '\\' || path.charAt(0) === '/') { + path = path.substring(1); + } + } - // ignore adding empty strings - if (!chunk) { - return; + return path; } - var lines, - sourceLines, - columns, - sourceColumns, - i; - - if (fileInfo && fileInfo.filename) { - var inputSource = this._contentsMap[fileInfo.filename]; - - // remove vars/banner added to the top of the file - if (this._contentsIgnoredCharsMap[fileInfo.filename]) { - // adjust the index - index -= this._contentsIgnoredCharsMap[fileInfo.filename]; - if (index < 0) { index = 0; } - // adjust the source - inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]); - } + normalizeFilename(filename) { + filename = filename.replace(/\\/g, '/'); + filename = this.removeBasepath(filename); + return (this._sourceMapRootpath || '') + filename; + } - // ignore empty content - if (inputSource === undefined) { + add(chunk, fileInfo, index, mapLines) { + // ignore adding empty strings + if (!chunk) { return; } - inputSource = inputSource.substring(0, index); - sourceLines = inputSource.split('\n'); - sourceColumns = sourceLines[sourceLines.length - 1]; - } + let lines; + let sourceLines; + let columns; + let sourceColumns; + let i; + + if (fileInfo && fileInfo.filename) { + let inputSource = this._contentsMap[fileInfo.filename]; + + // remove vars/banner added to the top of the file + if (this._contentsIgnoredCharsMap[fileInfo.filename]) { + // adjust the index + index -= this._contentsIgnoredCharsMap[fileInfo.filename]; + if (index < 0) { index = 0; } + // adjust the source + inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]); + } + + // ignore empty content + if (inputSource === undefined) { + return; + } + + inputSource = inputSource.substring(0, index); + sourceLines = inputSource.split('\n'); + sourceColumns = sourceLines[sourceLines.length - 1]; + } - lines = chunk.split('\n'); - columns = lines[lines.length - 1]; + lines = chunk.split('\n'); + columns = lines[lines.length - 1]; - if (fileInfo && fileInfo.filename) { - if (!mapLines) { - this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column}, - original: { line: sourceLines.length, column: sourceColumns.length}, - source: this.normalizeFilename(fileInfo.filename)}); - } else { - for (i = 0; i < lines.length; i++) { - this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0}, - original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0}, + if (fileInfo && fileInfo.filename) { + if (!mapLines) { + this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column}, + original: { line: sourceLines.length, column: sourceColumns.length}, source: this.normalizeFilename(fileInfo.filename)}); + } else { + for (i = 0; i < lines.length; i++) { + this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0}, + original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0}, + source: this.normalizeFilename(fileInfo.filename)}); + } } } - } - - if (lines.length === 1) { - this._column += columns.length; - } else { - this._lineNumber += lines.length - 1; - this._column = columns.length; - } - this._css.push(chunk); - }; + if (lines.length === 1) { + this._column += columns.length; + } else { + this._lineNumber += lines.length - 1; + this._column = columns.length; + } - SourceMapOutput.prototype.isEmpty = function() { - return this._css.length === 0; - }; + this._css.push(chunk); + } - SourceMapOutput.prototype.toCSS = function(context) { - this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null }); + isEmpty() { + return this._css.length === 0; + } - if (this._outputSourceFiles) { - for (var filename in this._contentsMap) { - if (this._contentsMap.hasOwnProperty(filename)) { - var source = this._contentsMap[filename]; - if (this._contentsIgnoredCharsMap[filename]) { - source = source.slice(this._contentsIgnoredCharsMap[filename]); + toCSS(context) { + this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null }); + + if (this._outputSourceFiles) { + for (const filename in this._contentsMap) { + if (this._contentsMap.hasOwnProperty(filename)) { + let source = this._contentsMap[filename]; + if (this._contentsIgnoredCharsMap[filename]) { + source = source.slice(this._contentsIgnoredCharsMap[filename]); + } + this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source); } - this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source); } } - } - this._rootNode.genCSS(context, this); + this._rootNode.genCSS(context, this); + + if (this._css.length > 0) { + let sourceMapURL; + const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON()); - if (this._css.length > 0) { - var sourceMapURL, - sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON()); + if (this.sourceMapURL) { + sourceMapURL = this.sourceMapURL; + } else if (this._sourceMapFilename) { + sourceMapURL = this._sourceMapFilename; + } + this.sourceMapURL = sourceMapURL; - if (this.sourceMapURL) { - sourceMapURL = this.sourceMapURL; - } else if (this._sourceMapFilename) { - sourceMapURL = this._sourceMapFilename; + this.sourceMap = sourceMapContent; } - this.sourceMapURL = sourceMapURL; - this.sourceMap = sourceMapContent; + return this._css.join(''); } - - return this._css.join(''); - }; + } return SourceMapOutput; }; diff --git a/lib/less/transform-tree.js b/lib/less/transform-tree.js index 3799da454..e19baddd5 100644 --- a/lib/less/transform-tree.js +++ b/lib/less/transform-tree.js @@ -1,12 +1,11 @@ -var contexts = require('./contexts'), - visitor = require('./visitors'), - tree = require('./tree'); +import contexts from './contexts'; +import visitor from './visitors'; +import tree from './tree'; -module.exports = function(root, options) { - options = options || {}; - var evaldRoot, - variables = options.variables, - evalEnv = new contexts.Eval(options); +export default (root, options = {}) => { + let evaldRoot; + let variables = options.variables; + const evalEnv = new contexts.Eval(options); // // Allows setting variables with a hash, so: @@ -22,8 +21,8 @@ module.exports = function(root, options) { // ) // if (typeof variables === 'object' && !Array.isArray(variables)) { - variables = Object.keys(variables).map(function (k) { - var value = variables[k]; + variables = Object.keys(variables).map(k => { + let value = variables[k]; if (!(value instanceof tree.Value)) { if (!(value instanceof tree.Expression)) { @@ -31,17 +30,21 @@ module.exports = function(root, options) { } value = new tree.Value([value]); } - return new tree.Declaration('@' + k, value, false, null, 0); + return new tree.Declaration(`@${k}`, value, false, null, 0); }); evalEnv.frames = [new tree.Ruleset(null, variables)]; } - var visitors = [ + const visitors = [ new visitor.JoinSelectorVisitor(), new visitor.MarkVisibleSelectorsVisitor(true), new visitor.ExtendVisitor(), new visitor.ToCSSVisitor({compress: Boolean(options.compress)}) - ], preEvalVisitors = [], v, visitorIterator; + ]; + + const preEvalVisitors = []; + let v; + let visitorIterator; /** * first() / get() allows visitors to be added while visiting @@ -72,7 +75,7 @@ module.exports = function(root, options) { } } } - + evaldRoot = root.eval(evalEnv); for (var i = 0; i < visitors.length; i++) { diff --git a/lib/less/tree/anonymous.js b/lib/less/tree/anonymous.js index 2e8edee5b..8f15a2948 100644 --- a/lib/less/tree/anonymous.js +++ b/lib/less/tree/anonymous.js @@ -1,29 +1,35 @@ -var Node = require('./node'); +import Node from './node'; -var Anonymous = function (value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) { - this.value = value; - this._index = index; - this._fileInfo = currentFileInfo; - this.mapLines = mapLines; - this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike; - this.allowRoot = true; - this.copyVisibilityInfo(visibilityInfo); -}; -Anonymous.prototype = new Node(); -Anonymous.prototype.type = 'Anonymous'; -Anonymous.prototype.eval = function () { - return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo()); -}; -Anonymous.prototype.compare = function (other) { - return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; -}; -Anonymous.prototype.isRulesetLike = function() { - return this.rulesetLike; -}; -Anonymous.prototype.genCSS = function (context, output) { - this.nodeVisible = Boolean(this.value); - if (this.nodeVisible) { - output.add(this.value, this._fileInfo, this._index, this.mapLines); +class Anonymous extends Node { + constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) { + this.value = value; + this._index = index; + this._fileInfo = currentFileInfo; + this.mapLines = mapLines; + this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike; + this.allowRoot = true; + this.copyVisibilityInfo(visibilityInfo); + } + + eval() { + return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo()); } -}; -module.exports = Anonymous; + + compare(other) { + return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; + } + + isRulesetLike() { + return this.rulesetLike; + } + + genCSS(context, output) { + this.nodeVisible = Boolean(this.value); + if (this.nodeVisible) { + output.add(this.value, this._fileInfo, this._index, this.mapLines); + } + } +} + +Anonymous.prototype.type = 'Anonymous'; +export default Anonymous; diff --git a/lib/less/tree/assignment.js b/lib/less/tree/assignment.js index 56e069131..e96774bec 100644 --- a/lib/less/tree/assignment.js +++ b/lib/less/tree/assignment.js @@ -1,27 +1,31 @@ -var Node = require('./node'); +import Node from './node'; -var Assignment = function (key, val) { - this.key = key; - this.value = val; -}; +class Assignment extends Node { + constructor(key, val) { + this.key = key; + this.value = val; + } -Assignment.prototype = new Node(); -Assignment.prototype.type = 'Assignment'; -Assignment.prototype.accept = function (visitor) { - this.value = visitor.visit(this.value); -}; -Assignment.prototype.eval = function (context) { - if (this.value.eval) { - return new Assignment(this.key, this.value.eval(context)); + accept(visitor) { + this.value = visitor.visit(this.value); } - return this; -}; -Assignment.prototype.genCSS = function (context, output) { - output.add(this.key + '='); - if (this.value.genCSS) { - this.value.genCSS(context, output); - } else { - output.add(this.value); + + eval(context) { + if (this.value.eval) { + return new Assignment(this.key, this.value.eval(context)); + } + return this; } -}; -module.exports = Assignment; + + genCSS(context, output) { + output.add(`${this.key}=`); + if (this.value.genCSS) { + this.value.genCSS(context, output); + } else { + output.add(this.value); + } + } +} + +Assignment.prototype.type = 'Assignment'; +export default Assignment; diff --git a/lib/less/tree/atrule.js b/lib/less/tree/atrule.js index 3dc300609..5cbd93ede 100644 --- a/lib/less/tree/atrule.js +++ b/lib/less/tree/atrule.js @@ -1,136 +1,163 @@ -var Node = require('./node'), - Selector = require('./selector'), - Ruleset = require('./ruleset'), - Anonymous = require('./anonymous'); - -var AtRule = function (name, value, rules, index, currentFileInfo, debugInfo, isRooted, visibilityInfo) { - var i; - - this.name = name; - this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value); - if (rules) { - if (Array.isArray(rules)) { - this.rules = rules; - } else { - this.rules = [rules]; - this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors(); - } - for (i = 0; i < this.rules.length; i++) { - this.rules[i].allowImports = true; +import Node from './node'; +import Selector from './selector'; +import Ruleset from './ruleset'; +import Anonymous from './anonymous'; + +class AtRule extends Node { + constructor( + name, + value, + rules, + index, + currentFileInfo, + debugInfo, + isRooted, + visibilityInfo + ) { + let i; + + this.name = name; + this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value); + if (rules) { + if (Array.isArray(rules)) { + this.rules = rules; + } else { + this.rules = [rules]; + this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors(); + } + for (i = 0; i < this.rules.length; i++) { + this.rules[i].allowImports = true; + } + this.setParent(this.rules, this); } - this.setParent(this.rules, this); + this._index = index; + this._fileInfo = currentFileInfo; + this.debugInfo = debugInfo; + this.isRooted = isRooted || false; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; } - this._index = index; - this._fileInfo = currentFileInfo; - this.debugInfo = debugInfo; - this.isRooted = isRooted || false; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; -}; - -AtRule.prototype = new Node(); -AtRule.prototype.type = 'AtRule'; -AtRule.prototype.accept = function (visitor) { - var value = this.value, rules = this.rules; - if (rules) { - this.rules = visitor.visitArray(rules); - } - if (value) { - this.value = visitor.visit(value); - } -}; -AtRule.prototype.isRulesetLike = function() { - return this.rules || !this.isCharset(); -}; -AtRule.prototype.isCharset = function() { - return '@charset' === this.name; -}; -AtRule.prototype.genCSS = function (context, output) { - var value = this.value, rules = this.rules; - output.add(this.name, this.fileInfo(), this.getIndex()); - if (value) { - output.add(' '); - value.genCSS(context, output); + + accept(visitor) { + const value = this.value; + const rules = this.rules; + if (rules) { + this.rules = visitor.visitArray(rules); + } + if (value) { + this.value = visitor.visit(value); + } } - if (rules) { - this.outputRuleset(context, output, rules); - } else { - output.add(';'); + + isRulesetLike() { + return this.rules || !this.isCharset(); } -}; -AtRule.prototype.eval = function (context) { - var mediaPathBackup, mediaBlocksBackup, value = this.value, rules = this.rules; - - // media stored inside other atrule should not bubble over it - // backpup media bubbling information - mediaPathBackup = context.mediaPath; - mediaBlocksBackup = context.mediaBlocks; - // deleted media bubbling information - context.mediaPath = []; - context.mediaBlocks = []; - - if (value) { - value = value.eval(context); + + isCharset() { + return '@charset' === this.name; } - if (rules) { - // assuming that there is only one rule at this point - that is how parser constructs the rule - rules = [rules[0].eval(context)]; - rules[0].root = true; + + genCSS(context, output) { + const value = this.value; + const rules = this.rules; + output.add(this.name, this.fileInfo(), this.getIndex()); + if (value) { + output.add(' '); + value.genCSS(context, output); + } + if (rules) { + this.outputRuleset(context, output, rules); + } else { + output.add(';'); + } } - // restore media bubbling information - context.mediaPath = mediaPathBackup; - context.mediaBlocks = mediaBlocksBackup; - - return new AtRule(this.name, value, rules, - this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo()); -}; -AtRule.prototype.variable = function (name) { - if (this.rules) { - // assuming that there is only one rule at this point - that is how parser constructs the rule - return Ruleset.prototype.variable.call(this.rules[0], name); + + eval(context) { + let mediaPathBackup; + let mediaBlocksBackup; + let value = this.value; + let rules = this.rules; + + // media stored inside other atrule should not bubble over it + // backpup media bubbling information + mediaPathBackup = context.mediaPath; + mediaBlocksBackup = context.mediaBlocks; + // deleted media bubbling information + context.mediaPath = []; + context.mediaBlocks = []; + + if (value) { + value = value.eval(context); + } + if (rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + rules = [rules[0].eval(context)]; + rules[0].root = true; + } + // restore media bubbling information + context.mediaPath = mediaPathBackup; + context.mediaBlocks = mediaBlocksBackup; + + return new AtRule(this.name, value, rules, + this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo()); } -}; -AtRule.prototype.find = function () { - if (this.rules) { - // assuming that there is only one rule at this point - that is how parser constructs the rule - return Ruleset.prototype.find.apply(this.rules[0], arguments); + + variable(name) { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.variable.call(this.rules[0], name); + } } -}; -AtRule.prototype.rulesets = function () { - if (this.rules) { - // assuming that there is only one rule at this point - that is how parser constructs the rule - return Ruleset.prototype.rulesets.apply(this.rules[0]); + + find(...args) { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.find.apply(this.rules[0], args); + } } -}; -AtRule.prototype.outputRuleset = function (context, output, rules) { - var ruleCnt = rules.length, i; - context.tabLevel = (context.tabLevel | 0) + 1; - - // Compressed - if (context.compress) { - output.add('{'); - for (i = 0; i < ruleCnt; i++) { - rules[i].genCSS(context, output); + + rulesets() { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.rulesets.apply(this.rules[0]); } - output.add('}'); - context.tabLevel--; - return; } - // Non-compressed - var tabSetStr = '\n' + Array(context.tabLevel).join(' '), tabRuleStr = tabSetStr + ' '; - if (!ruleCnt) { - output.add(' {' + tabSetStr + '}'); - } else { - output.add(' {' + tabRuleStr); - rules[0].genCSS(context, output); - for (i = 1; i < ruleCnt; i++) { - output.add(tabRuleStr); - rules[i].genCSS(context, output); + outputRuleset(context, output, rules) { + const ruleCnt = rules.length; + let i; + context.tabLevel = (context.tabLevel | 0) + 1; + + // Compressed + if (context.compress) { + output.add('{'); + for (i = 0; i < ruleCnt; i++) { + rules[i].genCSS(context, output); + } + output.add('}'); + context.tabLevel--; + return; } - output.add(tabSetStr + '}'); + + // Non-compressed + const tabSetStr = `\n${Array(context.tabLevel).join(' ')}`; + + const tabRuleStr = `${tabSetStr} `; + if (!ruleCnt) { + output.add(` {${tabSetStr}}`); + } else { + output.add(` {${tabRuleStr}`); + rules[0].genCSS(context, output); + for (i = 1; i < ruleCnt; i++) { + output.add(tabRuleStr); + rules[i].genCSS(context, output); + } + output.add(`${tabSetStr}}`); + } + + context.tabLevel--; } +} - context.tabLevel--; -}; -module.exports = AtRule; +AtRule.prototype.type = 'AtRule'; +export default AtRule; diff --git a/lib/less/tree/attribute.js b/lib/less/tree/attribute.js index fe01e6971..9a0ed5d3a 100644 --- a/lib/less/tree/attribute.js +++ b/lib/less/tree/attribute.js @@ -1,27 +1,32 @@ -var Node = require('./node'); +import Node from './node'; -var Attribute = function (key, op, value) { - this.key = key; - this.op = op; - this.value = value; -}; -Attribute.prototype = new Node(); -Attribute.prototype.type = 'Attribute'; -Attribute.prototype.eval = function (context) { - return new Attribute(this.key.eval ? this.key.eval(context) : this.key, - this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value); -}; -Attribute.prototype.genCSS = function (context, output) { - output.add(this.toCSS(context)); -}; -Attribute.prototype.toCSS = function (context) { - var value = this.key.toCSS ? this.key.toCSS(context) : this.key; +class Attribute extends Node { + constructor(key, op, value) { + this.key = key; + this.op = op; + this.value = value; + } - if (this.op) { - value += this.op; - value += (this.value.toCSS ? this.value.toCSS(context) : this.value); + eval(context) { + return new Attribute(this.key.eval ? this.key.eval(context) : this.key, + this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value); } - return '[' + value + ']'; -}; -module.exports = Attribute; + genCSS(context, output) { + output.add(this.toCSS(context)); + } + + toCSS(context) { + let value = this.key.toCSS ? this.key.toCSS(context) : this.key; + + if (this.op) { + value += this.op; + value += (this.value.toCSS ? this.value.toCSS(context) : this.value); + } + + return `[${value}]`; + } +} + +Attribute.prototype.type = 'Attribute'; +export default Attribute; diff --git a/lib/less/tree/call.js b/lib/less/tree/call.js index 627b13b89..67065967f 100644 --- a/lib/less/tree/call.js +++ b/lib/less/tree/call.js @@ -1,97 +1,103 @@ -var Node = require('./node'), - Anonymous = require('./anonymous'), - FunctionCaller = require('../functions/function-caller'); +import Node from './node'; +import Anonymous from './anonymous'; +import FunctionCaller from '../functions/function-caller'; + // // A function call node. // -var Call = function (name, args, index, currentFileInfo) { - this.name = name; - this.args = args; - this.calc = name === 'calc'; - this._index = index; - this._fileInfo = currentFileInfo; -}; -Call.prototype = new Node(); -Call.prototype.type = 'Call'; -Call.prototype.accept = function (visitor) { - if (this.args) { - this.args = visitor.visitArray(this.args); +class Call extends Node { + constructor(name, args, index, currentFileInfo) { + this.name = name; + this.args = args; + this.calc = name === 'calc'; + this._index = index; + this._fileInfo = currentFileInfo; } -}; -// -// When evaluating a function call, -// we either find the function in the functionRegistry, -// in which case we call it, passing the evaluated arguments, -// if this returns null or we cannot find the function, we -// simply print it out as it appeared originally [2]. -// -// The reason why we evaluate the arguments, is in the case where -// we try to pass a variable to a function, like: `saturate(@color)`. -// The function should receive the value, not the variable. -// -Call.prototype.eval = function (context) { - /** - * Turn off math for calc(), and switch back on for evaluating nested functions - */ - var currentMathContext = context.mathOn; - context.mathOn = !this.calc; - if (this.calc || context.inCalc) { - context.enterCalc(); - } - var args = this.args.map(function (a) { return a.eval(context); }); - if (this.calc || context.inCalc) { - context.exitCalc(); + + accept(visitor) { + if (this.args) { + this.args = visitor.visitArray(this.args); + } } - context.mathOn = currentMathContext; - var result, funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo()); - - if (funcCaller.isValid()) { - try { - result = funcCaller.call(args); - } catch (e) { - throw { - type: e.type || 'Runtime', - message: 'error evaluating function `' + this.name + '`' + - (e.message ? ': ' + e.message : ''), - index: this.getIndex(), - filename: this.fileInfo().filename, - line: e.lineNumber, - column: e.columnNumber - }; + // + // When evaluating a function call, + // we either find the function in the functionRegistry, + // in which case we call it, passing the evaluated arguments, + // if this returns null or we cannot find the function, we + // simply print it out as it appeared originally [2]. + // + // The reason why we evaluate the arguments, is in the case where + // we try to pass a variable to a function, like: `saturate(@color)`. + // The function should receive the value, not the variable. + // + eval(context) { + /** + * Turn off math for calc(), and switch back on for evaluating nested functions + */ + const currentMathContext = context.mathOn; + context.mathOn = !this.calc; + if (this.calc || context.inCalc) { + context.enterCalc(); + } + const args = this.args.map(a => a.eval(context)); + if (this.calc || context.inCalc) { + context.exitCalc(); } + context.mathOn = currentMathContext; - if (result !== null && result !== undefined) { - // Results that that are not nodes are cast as Anonymous nodes - // Falsy values or booleans are returned as empty nodes - if (!(result instanceof Node)) { - if (!result || result === true) { - result = new Anonymous(null); - } - else { - result = new Anonymous(result.toString()); + let result; + const funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo()); + + if (funcCaller.isValid()) { + try { + result = funcCaller.call(args); + } catch (e) { + throw { + type: e.type || 'Runtime', + message: `error evaluating function \`${this.name}\`${e.message ? `: ${e.message}` : ''}`, + index: this.getIndex(), + filename: this.fileInfo().filename, + line: e.lineNumber, + column: e.columnNumber + }; + } + + if (result !== null && result !== undefined) { + // Results that that are not nodes are cast as Anonymous nodes + // Falsy values or booleans are returned as empty nodes + if (!(result instanceof Node)) { + if (!result || result === true) { + result = new Anonymous(null); + } + else { + result = new Anonymous(result.toString()); + } + } - + result._index = this._index; + result._fileInfo = this._fileInfo; + return result; } - result._index = this._index; - result._fileInfo = this._fileInfo; - return result; + } + return new Call(this.name, args, this.getIndex(), this.fileInfo()); } - return new Call(this.name, args, this.getIndex(), this.fileInfo()); -}; -Call.prototype.genCSS = function (context, output) { - output.add(this.name + '(', this.fileInfo(), this.getIndex()); + genCSS(context, output) { + output.add(`${this.name}(`, this.fileInfo(), this.getIndex()); - for (var i = 0; i < this.args.length; i++) { - this.args[i].genCSS(context, output); - if (i + 1 < this.args.length) { - output.add(', '); + for (let i = 0; i < this.args.length; i++) { + this.args[i].genCSS(context, output); + if (i + 1 < this.args.length) { + output.add(', '); + } } + + output.add(')'); } +} - output.add(')'); -}; -module.exports = Call; +Call.prototype.type = 'Call'; +export default Call; diff --git a/lib/less/tree/color.js b/lib/less/tree/color.js index e639f432e..057a228cf 100644 --- a/lib/less/tree/color.js +++ b/lib/less/tree/color.js @@ -1,219 +1,234 @@ -var Node = require('./node'), - colors = require('../data/colors'); +import Node from './node'; +import colors from '../data/colors'; // // RGB Colors - #ff0014, #eee // -var Color = function (rgb, a, originalForm) { - var self = this; - // - // The end goal here, is to parse the arguments - // into an integer triplet, such as `128, 255, 0` - // - // This facilitates operations and conversions. - // - if (Array.isArray(rgb)) { - this.rgb = rgb; - } else if (rgb.length >= 6) { - this.rgb = []; - rgb.match(/.{2}/g).map(function (c, i) { - if (i < 3) { - self.rgb.push(parseInt(c, 16)); - } else { - self.alpha = (parseInt(c, 16)) / 255; - } - }); - } else { - this.rgb = []; - rgb.split('').map(function (c, i) { - if (i < 3) { - self.rgb.push(parseInt(c + c, 16)); - } else { - self.alpha = (parseInt(c + c, 16)) / 255; - } - }); - } - this.alpha = this.alpha || (typeof a === 'number' ? a : 1); - if (typeof originalForm !== 'undefined') { - this.value = originalForm; +class Color extends Node { + constructor(rgb, a, originalForm) { + const self = this; + // + // The end goal here, is to parse the arguments + // into an integer triplet, such as `128, 255, 0` + // + // This facilitates operations and conversions. + // + if (Array.isArray(rgb)) { + this.rgb = rgb; + } else if (rgb.length >= 6) { + this.rgb = []; + rgb.match(/.{2}/g).map((c, i) => { + if (i < 3) { + self.rgb.push(parseInt(c, 16)); + } else { + self.alpha = (parseInt(c, 16)) / 255; + } + }); + } else { + this.rgb = []; + rgb.split('').map((c, i) => { + if (i < 3) { + self.rgb.push(parseInt(c + c, 16)); + } else { + self.alpha = (parseInt(c + c, 16)) / 255; + } + }); + } + this.alpha = this.alpha || (typeof a === 'number' ? a : 1); + if (typeof originalForm !== 'undefined') { + this.value = originalForm; + } } -}; -Color.prototype = new Node(); -Color.prototype.type = 'Color'; + luma() { + let r = this.rgb[0] / 255; + let g = this.rgb[1] / 255; + let b = this.rgb[2] / 255; -function clamp(v, max) { - return Math.min(Math.max(v, 0), max); -} - -function toHex(v) { - return '#' + v.map(function (c) { - c = clamp(Math.round(c), 255); - return (c < 16 ? '0' : '') + c.toString(16); - }).join(''); -} + r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4); + g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4); + b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4); -Color.prototype.luma = function () { - var r = this.rgb[0] / 255, - g = this.rgb[1] / 255, - b = this.rgb[2] / 255; - - r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4); - g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4); - b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4); - - return 0.2126 * r + 0.7152 * g + 0.0722 * b; -}; -Color.prototype.genCSS = function (context, output) { - output.add(this.toCSS(context)); -}; -Color.prototype.toCSS = function (context, doNotCompress) { - var compress = context && context.compress && !doNotCompress, color, alpha, - colorFunction, args = []; + return 0.2126 * r + 0.7152 * g + 0.0722 * b; + } - // `value` is set if this color was originally - // converted from a named color string so we need - // to respect this and try to output named color too. - alpha = this.fround(context, this.alpha); + genCSS(context, output) { + output.add(this.toCSS(context)); + } - if (this.value) { - if (this.value.indexOf('rgb') === 0) { - if (alpha < 1) { - colorFunction = 'rgba'; - } - } else if (this.value.indexOf('hsl') === 0) { - if (alpha < 1) { - colorFunction = 'hsla'; + toCSS(context, doNotCompress) { + const compress = context && context.compress && !doNotCompress; + let color; + let alpha; + let colorFunction; + let args = []; + + // `value` is set if this color was originally + // converted from a named color string so we need + // to respect this and try to output named color too. + alpha = this.fround(context, this.alpha); + + if (this.value) { + if (this.value.indexOf('rgb') === 0) { + if (alpha < 1) { + colorFunction = 'rgba'; + } + } else if (this.value.indexOf('hsl') === 0) { + if (alpha < 1) { + colorFunction = 'hsla'; + } else { + colorFunction = 'hsl'; + } } else { - colorFunction = 'hsl'; + return this.value; } } else { - return this.value; + if (alpha < 1) { + colorFunction = 'rgba'; + } } - } else { - if (alpha < 1) { - colorFunction = 'rgba'; + + switch (colorFunction) { + case 'rgba': + args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1)); + break; + case 'hsla': + args.push(clamp(alpha, 1)); + case 'hsl': + color = this.toHSL(); + args = [ + this.fround(context, color.h), + `${this.fround(context, color.s * 100)}%`, + `${this.fround(context, color.l * 100)}%` + ].concat(args); } - } - switch (colorFunction) { - case 'rgba': - args = this.rgb.map(function (c) { - return clamp(Math.round(c), 255); - }).concat(clamp(alpha, 1)); - break; - case 'hsla': - args.push(clamp(alpha, 1)); - case 'hsl': - color = this.toHSL(); - args = [ - this.fround(context, color.h), - this.fround(context, color.s * 100) + '%', - this.fround(context, color.l * 100) + '%' - ].concat(args); + if (colorFunction) { + // Values are capped between `0` and `255`, rounded and zero-padded. + return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`; + } + + color = this.toRGB(); + + if (compress) { + const splitcolor = color.split(''); + + // Convert color to short format + if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) { + color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`; + } + } + + return color; } - if (colorFunction) { - // Values are capped between `0` and `255`, rounded and zero-padded. - return colorFunction + '(' + args.join(',' + (compress ? '' : ' ')) + ')'; + // + // Operations have to be done per-channel, if not, + // channels will spill onto each other. Once we have + // our result, in the form of an integer triplet, + // we create a new Color node to hold the result. + // + operate(context, op, other) { + const rgb = new Array(3); + const alpha = this.alpha * (1 - other.alpha) + other.alpha; + for (let c = 0; c < 3; c++) { + rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]); + } + return new Color(rgb, alpha); } - color = this.toRGB(); + toRGB() { + return toHex(this.rgb); + } - if (compress) { - var splitcolor = color.split(''); + toHSL() { + const r = this.rgb[0] / 255; + const g = this.rgb[1] / 255; + const b = this.rgb[2] / 255; + const a = this.alpha; + const max = Math.max(r, g, b); + const min = Math.min(r, g, b); + let h; + let s; + const l = (max + min) / 2; + const d = max - min; + + if (max === min) { + h = s = 0; + } else { + s = l > 0.5 ? d / (2 - max - min) : d / (max + min); - // Convert color to short format - if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) { - color = '#' + splitcolor[1] + splitcolor[3] + splitcolor[5]; + switch (max) { + case r: h = (g - b) / d + (g < b ? 6 : 0); break; + case g: h = (b - r) / d + 2; break; + case b: h = (r - g) / d + 4; break; + } + h /= 6; } + return { h: h * 360, s, l, a }; } - return color; -}; + // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript + toHSV() { + const r = this.rgb[0] / 255; + const g = this.rgb[1] / 255; + const b = this.rgb[2] / 255; + const a = this.alpha; + const max = Math.max(r, g, b); + const min = Math.min(r, g, b); + let h; + let s; + const v = max; + + const d = max - min; + if (max === 0) { + s = 0; + } else { + s = d / max; + } -// -// Operations have to be done per-channel, if not, -// channels will spill onto each other. Once we have -// our result, in the form of an integer triplet, -// we create a new Color node to hold the result. -// -Color.prototype.operate = function (context, op, other) { - var rgb = new Array(3); - var alpha = this.alpha * (1 - other.alpha) + other.alpha; - for (var c = 0; c < 3; c++) { - rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]); - } - return new Color(rgb, alpha); -}; -Color.prototype.toRGB = function () { - return toHex(this.rgb); -}; -Color.prototype.toHSL = function () { - var r = this.rgb[0] / 255, - g = this.rgb[1] / 255, - b = this.rgb[2] / 255, - a = this.alpha; - - var max = Math.max(r, g, b), min = Math.min(r, g, b); - var h, s, l = (max + min) / 2, d = max - min; - - if (max === min) { - h = s = 0; - } else { - s = l > 0.5 ? d / (2 - max - min) : d / (max + min); - - switch (max) { - case r: h = (g - b) / d + (g < b ? 6 : 0); break; - case g: h = (b - r) / d + 2; break; - case b: h = (r - g) / d + 4; break; + if (max === min) { + h = 0; + } else { + switch (max) { + case r: h = (g - b) / d + (g < b ? 6 : 0); break; + case g: h = (b - r) / d + 2; break; + case b: h = (r - g) / d + 4; break; + } + h /= 6; } - h /= 6; + return { h: h * 360, s, v, a }; } - return { h: h * 360, s: s, l: l, a: a }; -}; -// Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript -Color.prototype.toHSV = function () { - var r = this.rgb[0] / 255, - g = this.rgb[1] / 255, - b = this.rgb[2] / 255, - a = this.alpha; - - var max = Math.max(r, g, b), min = Math.min(r, g, b); - var h, s, v = max; - - var d = max - min; - if (max === 0) { - s = 0; - } else { - s = d / max; + + toARGB() { + return toHex([this.alpha * 255].concat(this.rgb)); } - if (max === min) { - h = 0; - } else { - switch (max) { - case r: h = (g - b) / d + (g < b ? 6 : 0); break; - case g: h = (b - r) / d + 2; break; - case b: h = (r - g) / d + 4; break; - } - h /= 6; + compare(x) { + return (x.rgb && + x.rgb[0] === this.rgb[0] && + x.rgb[1] === this.rgb[1] && + x.rgb[2] === this.rgb[2] && + x.alpha === this.alpha) ? 0 : undefined; } - return { h: h * 360, s: s, v: v, a: a }; -}; -Color.prototype.toARGB = function () { - return toHex([this.alpha * 255].concat(this.rgb)); -}; -Color.prototype.compare = function (x) { - return (x.rgb && - x.rgb[0] === this.rgb[0] && - x.rgb[1] === this.rgb[1] && - x.rgb[2] === this.rgb[2] && - x.alpha === this.alpha) ? 0 : undefined; -}; +} + +Color.prototype.type = 'Color'; + +function clamp(v, max) { + return Math.min(Math.max(v, 0), max); +} + +function toHex(v) { + return `#${v.map(c => { + c = clamp(Math.round(c), 255); + return (c < 16 ? '0' : '') + c.toString(16); +}).join('')}`; +} -Color.fromKeyword = function(keyword) { - var c, key = keyword.toLowerCase(); +Color.fromKeyword = keyword => { + let c; + const key = keyword.toLowerCase(); if (colors.hasOwnProperty(key)) { c = new Color(colors[key].slice(1)); } @@ -226,4 +241,4 @@ Color.fromKeyword = function(keyword) { return c; } }; -module.exports = Color; +export default Color; diff --git a/lib/less/tree/combinator.js b/lib/less/tree/combinator.js index fcb2b776c..6258b158e 100644 --- a/lib/less/tree/combinator.js +++ b/lib/less/tree/combinator.js @@ -1,23 +1,26 @@ -var Node = require('./node'); +import Node from './node'; -var Combinator = function (value) { - if (value === ' ') { - this.value = ' '; - this.emptyOrWhitespace = true; - } else { - this.value = value ? value.trim() : ''; - this.emptyOrWhitespace = this.value === ''; +class Combinator extends Node { + constructor(value) { + if (value === ' ') { + this.value = ' '; + this.emptyOrWhitespace = true; + } else { + this.value = value ? value.trim() : ''; + this.emptyOrWhitespace = this.value === ''; + } } -}; -Combinator.prototype = new Node(); + + genCSS(context, output) { + const spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' '; + output.add(spaceOrEmpty + this.value + spaceOrEmpty); + } +} + Combinator.prototype.type = 'Combinator'; -var _noSpaceCombinators = { +const _noSpaceCombinators = { '': true, ' ': true, '|': true }; -Combinator.prototype.genCSS = function (context, output) { - var spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' '; - output.add(spaceOrEmpty + this.value + spaceOrEmpty); -}; -module.exports = Combinator; +export default Combinator; diff --git a/lib/less/tree/comment.js b/lib/less/tree/comment.js index ec029a6ba..ae4062803 100644 --- a/lib/less/tree/comment.js +++ b/lib/less/tree/comment.js @@ -1,23 +1,27 @@ -var Node = require('./node'), - getDebugInfo = require('./debug-info'); +import Node from './node'; +import getDebugInfo from './debug-info'; -var Comment = function (value, isLineComment, index, currentFileInfo) { - this.value = value; - this.isLineComment = isLineComment; - this._index = index; - this._fileInfo = currentFileInfo; - this.allowRoot = true; -}; -Comment.prototype = new Node(); -Comment.prototype.type = 'Comment'; -Comment.prototype.genCSS = function (context, output) { - if (this.debugInfo) { - output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex()); +class Comment extends Node { + constructor(value, isLineComment, index, currentFileInfo) { + this.value = value; + this.isLineComment = isLineComment; + this._index = index; + this._fileInfo = currentFileInfo; + this.allowRoot = true; + } + + genCSS(context, output) { + if (this.debugInfo) { + output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex()); + } + output.add(this.value); } - output.add(this.value); -}; -Comment.prototype.isSilent = function(context) { - var isCompressed = context.compress && this.value[2] !== '!'; - return this.isLineComment || isCompressed; -}; -module.exports = Comment; + + isSilent(context) { + const isCompressed = context.compress && this.value[2] !== '!'; + return this.isLineComment || isCompressed; + } +} + +Comment.prototype.type = 'Comment'; +export default Comment; diff --git a/lib/less/tree/condition.js b/lib/less/tree/condition.js index 64177f6e3..b2514b232 100644 --- a/lib/less/tree/condition.js +++ b/lib/less/tree/condition.js @@ -1,37 +1,41 @@ -var Node = require('./node'); +import Node from './node'; -var Condition = function (op, l, r, i, negate) { - this.op = op.trim(); - this.lvalue = l; - this.rvalue = r; - this._index = i; - this.negate = negate; -}; -Condition.prototype = new Node(); -Condition.prototype.type = 'Condition'; -Condition.prototype.accept = function (visitor) { - this.lvalue = visitor.visit(this.lvalue); - this.rvalue = visitor.visit(this.rvalue); -}; -Condition.prototype.eval = function (context) { - var result = (function (op, a, b) { - switch (op) { - case 'and': return a && b; - case 'or': return a || b; - default: - switch (Node.compare(a, b)) { - case -1: - return op === '<' || op === '=<' || op === '<='; - case 0: - return op === '=' || op === '>=' || op === '=<' || op === '<='; - case 1: - return op === '>' || op === '>='; - default: - return false; - } - } - })(this.op, this.lvalue.eval(context), this.rvalue.eval(context)); +class Condition extends Node { + constructor(op, l, r, i, negate) { + this.op = op.trim(); + this.lvalue = l; + this.rvalue = r; + this._index = i; + this.negate = negate; + } + + accept(visitor) { + this.lvalue = visitor.visit(this.lvalue); + this.rvalue = visitor.visit(this.rvalue); + } + + eval(context) { + const result = ((op, a, b) => { + switch (op) { + case 'and': return a && b; + case 'or': return a || b; + default: + switch (Node.compare(a, b)) { + case -1: + return op === '<' || op === '=<' || op === '<='; + case 0: + return op === '=' || op === '>=' || op === '=<' || op === '<='; + case 1: + return op === '>' || op === '>='; + default: + return false; + } + } + })(this.op, this.lvalue.eval(context), this.rvalue.eval(context)); - return this.negate ? !result : result; -}; -module.exports = Condition; + return this.negate ? !result : result; + } +} + +Condition.prototype.type = 'Condition'; +export default Condition; diff --git a/lib/less/tree/debug-info.js b/lib/less/tree/debug-info.js index 56fb2246e..1b8698a1e 100644 --- a/lib/less/tree/debug-info.js +++ b/lib/less/tree/debug-info.js @@ -1,5 +1,5 @@ -var debugInfo = function(context, ctx, lineSeparator) { - var result = ''; +const debugInfo = (context, ctx, lineSeparator) => { + let result = ''; if (context.dumpLineNumbers && !context.compress) { switch (context.dumpLineNumbers) { case 'comments': @@ -16,23 +16,19 @@ var debugInfo = function(context, ctx, lineSeparator) { return result; }; -debugInfo.asComment = function(ctx) { - return '/* line ' + ctx.debugInfo.lineNumber + ', ' + ctx.debugInfo.fileName + ' */\n'; -}; +debugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\n`; -debugInfo.asMediaQuery = function(ctx) { - var filenameWithProtocol = ctx.debugInfo.fileName; +debugInfo.asMediaQuery = ctx => { + let filenameWithProtocol = ctx.debugInfo.fileName; if (!/^[a-z]+:\/\//i.test(filenameWithProtocol)) { - filenameWithProtocol = 'file://' + filenameWithProtocol; + filenameWithProtocol = `file://${filenameWithProtocol}`; + } + return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\/\\])/g, a => { + if (a == '\\') { + a = '\/'; } - return '@media -sass-debug-info{filename{font-family:' + - filenameWithProtocol.replace(/([.:\/\\])/g, function (a) { - if (a == '\\') { - a = '\/'; - } - return '\\' + a; - }) + - '}line{font-family:\\00003' + ctx.debugInfo.lineNumber + '}}\n'; + return `\\${a}`; +})}}line{font-family:\\00003${ctx.debugInfo.lineNumber}}}\n`; }; -module.exports = debugInfo; +export default debugInfo; diff --git a/lib/less/tree/declaration.js b/lib/less/tree/declaration.js index d6232ba7c..8c16c7a6e 100644 --- a/lib/less/tree/declaration.js +++ b/lib/less/tree/declaration.js @@ -1,102 +1,111 @@ -var Node = require('./node'), - Value = require('./value'), - Keyword = require('./keyword'), - Anonymous = require('./anonymous'), - MATH = require('../constants').Math; +import Node from './node'; +import Value from './value'; +import Keyword from './keyword'; +import Anonymous from './anonymous'; +import {Math as MATH} from '../constants'; -var Declaration = function (name, value, important, merge, index, currentFileInfo, inline, variable) { - this.name = name; - this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]); - this.important = important ? ' ' + important.trim() : ''; - this.merge = merge; - this._index = index; - this._fileInfo = currentFileInfo; - this.inline = inline || false; - this.variable = (variable !== undefined) ? variable - : (name.charAt && (name.charAt(0) === '@')); - this.allowRoot = true; - this.setParent(this.value, this); -}; - -function evalName(context, name) { - var value = '', i, n = name.length, - output = {add: function (s) {value += s;}}; - for (i = 0; i < n; i++) { - name[i].eval(context).genCSS(context, output); +class Declaration extends Node { + constructor(name, value, important, merge, index, currentFileInfo, inline, variable) { + this.name = name; + this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]); + this.important = important ? ` ${important.trim()}` : ''; + this.merge = merge; + this._index = index; + this._fileInfo = currentFileInfo; + this.inline = inline || false; + this.variable = (variable !== undefined) ? variable + : (name.charAt && (name.charAt(0) === '@')); + this.allowRoot = true; + this.setParent(this.value, this); } - return value; -} -Declaration.prototype = new Node(); -Declaration.prototype.type = 'Declaration'; -Declaration.prototype.genCSS = function (context, output) { - output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex()); - try { - this.value.genCSS(context, output); - } - catch (e) { - e.index = this._index; - e.filename = this._fileInfo.filename; - throw e; - } - output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index); -}; -Declaration.prototype.eval = function (context) { - var mathBypass = false, prevMath, name = this.name, evaldValue, variable = this.variable; - if (typeof name !== 'string') { - // expand 'primitive' name directly to get - // things faster (~10% for benchmark.less): - name = (name.length === 1) && (name[0] instanceof Keyword) ? - name[0].value : evalName(context, name); - variable = false; // never treat expanded interpolation as new variable name - } - - // @todo remove when parens-division is default - if (name === 'font' && context.math === MATH.ALWAYS) { - mathBypass = true; - prevMath = context.math; - context.math = MATH.PARENS_DIVISION; + genCSS(context, output) { + output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex()); + try { + this.value.genCSS(context, output); + } + catch (e) { + e.index = this._index; + e.filename = this._fileInfo.filename; + throw e; + } + output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index); } - try { - context.importantScope.push({}); - evaldValue = this.value.eval(context); - if (!this.variable && evaldValue.type === 'DetachedRuleset') { - throw { message: 'Rulesets cannot be evaluated on a property.', - index: this.getIndex(), filename: this.fileInfo().filename }; + eval(context) { + let mathBypass = false; + let prevMath; + let name = this.name; + let evaldValue; + let variable = this.variable; + if (typeof name !== 'string') { + // expand 'primitive' name directly to get + // things faster (~10% for benchmark.less): + name = (name.length === 1) && (name[0] instanceof Keyword) ? + name[0].value : evalName(context, name); + variable = false; // never treat expanded interpolation as new variable name } - var important = this.important, - importantResult = context.importantScope.pop(); - if (!important && importantResult.important) { - important = importantResult.important; + + // @todo remove when parens-division is default + if (name === 'font' && context.math === MATH.ALWAYS) { + mathBypass = true; + prevMath = context.math; + context.math = MATH.PARENS_DIVISION; } + try { + context.importantScope.push({}); + evaldValue = this.value.eval(context); - return new Declaration(name, - evaldValue, - important, - this.merge, - this.getIndex(), this.fileInfo(), this.inline, - variable); - } - catch (e) { - if (typeof e.index !== 'number') { - e.index = this.getIndex(); - e.filename = this.fileInfo().filename; + if (!this.variable && evaldValue.type === 'DetachedRuleset') { + throw { message: 'Rulesets cannot be evaluated on a property.', + index: this.getIndex(), filename: this.fileInfo().filename }; + } + let important = this.important; + const importantResult = context.importantScope.pop(); + if (!important && importantResult.important) { + important = importantResult.important; + } + + return new Declaration(name, + evaldValue, + important, + this.merge, + this.getIndex(), this.fileInfo(), this.inline, + variable); } - throw e; - } - finally { - if (mathBypass) { - context.math = prevMath; + catch (e) { + if (typeof e.index !== 'number') { + e.index = this.getIndex(); + e.filename = this.fileInfo().filename; + } + throw e; } + finally { + if (mathBypass) { + context.math = prevMath; + } + } + } + + makeImportant() { + return new Declaration(this.name, + this.value, + '!important', + this.merge, + this.getIndex(), this.fileInfo(), this.inline); + } +} + +function evalName(context, name) { + let value = ''; + let i; + const n = name.length; + const output = {add: function (s) {value += s;}}; + for (i = 0; i < n; i++) { + name[i].eval(context).genCSS(context, output); } -}; -Declaration.prototype.makeImportant = function () { - return new Declaration(this.name, - this.value, - '!important', - this.merge, - this.getIndex(), this.fileInfo(), this.inline); -}; + return value; +} -module.exports = Declaration; \ No newline at end of file +Declaration.prototype.type = 'Declaration'; +export default Declaration; \ No newline at end of file diff --git a/lib/less/tree/detached-ruleset.js b/lib/less/tree/detached-ruleset.js index c2c1f4c35..c3e95f64b 100644 --- a/lib/less/tree/detached-ruleset.js +++ b/lib/less/tree/detached-ruleset.js @@ -1,23 +1,28 @@ -var Node = require('./node'), - contexts = require('../contexts'), - utils = require('../utils'); +import Node from './node'; +import contexts from '../contexts'; +import utils from '../utils'; + +class DetachedRuleset extends Node { + constructor(ruleset, frames) { + this.ruleset = ruleset; + this.frames = frames; + this.setParent(this.ruleset, this); + } + + accept(visitor) { + this.ruleset = visitor.visit(this.ruleset); + } + + eval(context) { + const frames = this.frames || utils.copyArray(context.frames); + return new DetachedRuleset(this.ruleset, frames); + } + + callEval(context) { + return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context); + } +} -var DetachedRuleset = function (ruleset, frames) { - this.ruleset = ruleset; - this.frames = frames; - this.setParent(this.ruleset, this); -}; -DetachedRuleset.prototype = new Node(); DetachedRuleset.prototype.type = 'DetachedRuleset'; DetachedRuleset.prototype.evalFirst = true; -DetachedRuleset.prototype.accept = function (visitor) { - this.ruleset = visitor.visit(this.ruleset); -}; -DetachedRuleset.prototype.eval = function (context) { - var frames = this.frames || utils.copyArray(context.frames); - return new DetachedRuleset(this.ruleset, frames); -}; -DetachedRuleset.prototype.callEval = function (context) { - return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context); -}; -module.exports = DetachedRuleset; +export default DetachedRuleset; diff --git a/lib/less/tree/dimension.js b/lib/less/tree/dimension.js index b850e8e8b..ad680dd5e 100644 --- a/lib/less/tree/dimension.js +++ b/lib/less/tree/dimension.js @@ -1,161 +1,176 @@ -var Node = require('./node'), - unitConversions = require('../data/unit-conversions'), - Unit = require('./unit'), - Color = require('./color'); +import Node from './node'; +import unitConversions from '../data/unit-conversions'; +import Unit from './unit'; +import Color from './color'; // // A number with a unit // -var Dimension = function (value, unit) { - this.value = parseFloat(value); - if (isNaN(this.value)) { - throw new Error('Dimension is not a number.'); +class Dimension extends Node { + constructor(value, unit) { + this.value = parseFloat(value); + if (isNaN(this.value)) { + throw new Error('Dimension is not a number.'); + } + this.unit = (unit && unit instanceof Unit) ? unit : + new Unit(unit ? [unit] : undefined); + this.setParent(this.unit, this); } - this.unit = (unit && unit instanceof Unit) ? unit : - new Unit(unit ? [unit] : undefined); - this.setParent(this.unit, this); -}; -Dimension.prototype = new Node(); -Dimension.prototype.type = 'Dimension'; -Dimension.prototype.accept = function (visitor) { - this.unit = visitor.visit(this.unit); -}; -Dimension.prototype.eval = function (context) { - return this; -}; -Dimension.prototype.toColor = function () { - return new Color([this.value, this.value, this.value]); -}; -Dimension.prototype.genCSS = function (context, output) { - if ((context && context.strictUnits) && !this.unit.isSingular()) { - throw new Error('Multiple units in dimension. Correct the units or use the unit function. Bad unit: ' + this.unit.toString()); + accept(visitor) { + this.unit = visitor.visit(this.unit); } - var value = this.fround(context, this.value), - strValue = String(value); + eval(context) { + return this; + } - if (value !== 0 && value < 0.000001 && value > -0.000001) { - // would be output 1e-6 etc. - strValue = value.toFixed(20).replace(/0+$/, ''); + toColor() { + return new Color([this.value, this.value, this.value]); } - if (context && context.compress) { - // Zero values doesn't need a unit - if (value === 0 && this.unit.isLength()) { - output.add(strValue); - return; + genCSS(context, output) { + if ((context && context.strictUnits) && !this.unit.isSingular()) { + throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`); } - // Float values doesn't need a leading zero - if (value > 0 && value < 1) { - strValue = (strValue).substr(1); + const value = this.fround(context, this.value); + let strValue = String(value); + + if (value !== 0 && value < 0.000001 && value > -0.000001) { + // would be output 1e-6 etc. + strValue = value.toFixed(20).replace(/0+$/, ''); } - } - output.add(strValue); - this.unit.genCSS(context, output); -}; - -// In an operation between two Dimensions, -// we default to the first Dimension's unit, -// so `1px + 2` will yield `3px`. -Dimension.prototype.operate = function (context, op, other) { - /* jshint noempty:false */ - var value = this._operate(context, op, this.value, other.value), - unit = this.unit.clone(); - - if (op === '+' || op === '-') { - if (unit.numerator.length === 0 && unit.denominator.length === 0) { - unit = other.unit.clone(); - if (this.unit.backupUnit) { - unit.backupUnit = this.unit.backupUnit; + if (context && context.compress) { + // Zero values doesn't need a unit + if (value === 0 && this.unit.isLength()) { + output.add(strValue); + return; } - } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) { - // do nothing - } else { - other = other.convertTo(this.unit.usedUnits()); - if (context.strictUnits && other.unit.toString() !== unit.toString()) { - throw new Error('Incompatible units. Change the units or use the unit function. Bad units: \'' + unit.toString() + - '\' and \'' + other.unit.toString() + '\'.'); + // Float values doesn't need a leading zero + if (value > 0 && value < 1) { + strValue = (strValue).substr(1); } - - value = this._operate(context, op, this.value, other.value); } - } else if (op === '*') { - unit.numerator = unit.numerator.concat(other.unit.numerator).sort(); - unit.denominator = unit.denominator.concat(other.unit.denominator).sort(); - unit.cancel(); - } else if (op === '/') { - unit.numerator = unit.numerator.concat(other.unit.denominator).sort(); - unit.denominator = unit.denominator.concat(other.unit.numerator).sort(); - unit.cancel(); + + output.add(strValue); + this.unit.genCSS(context, output); } - return new Dimension(value, unit); -}; -Dimension.prototype.compare = function (other) { - var a, b; - if (!(other instanceof Dimension)) { - return undefined; + // In an operation between two Dimensions, + // we default to the first Dimension's unit, + // so `1px + 2` will yield `3px`. + operate(context, op, other) { + /* jshint noempty:false */ + let value = this._operate(context, op, this.value, other.value); + + let unit = this.unit.clone(); + + if (op === '+' || op === '-') { + if (unit.numerator.length === 0 && unit.denominator.length === 0) { + unit = other.unit.clone(); + if (this.unit.backupUnit) { + unit.backupUnit = this.unit.backupUnit; + } + } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) { + // do nothing + } else { + other = other.convertTo(this.unit.usedUnits()); + + if (context.strictUnits && other.unit.toString() !== unit.toString()) { + throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`); + } + + value = this._operate(context, op, this.value, other.value); + } + } else if (op === '*') { + unit.numerator = unit.numerator.concat(other.unit.numerator).sort(); + unit.denominator = unit.denominator.concat(other.unit.denominator).sort(); + unit.cancel(); + } else if (op === '/') { + unit.numerator = unit.numerator.concat(other.unit.denominator).sort(); + unit.denominator = unit.denominator.concat(other.unit.numerator).sort(); + unit.cancel(); + } + return new Dimension(value, unit); } - if (this.unit.isEmpty() || other.unit.isEmpty()) { - a = this; - b = other; - } else { - a = this.unify(); - b = other.unify(); - if (a.unit.compare(b.unit) !== 0) { + compare(other) { + let a; + let b; + + if (!(other instanceof Dimension)) { return undefined; } - } - return Node.numericCompare(a.value, b.value); -}; -Dimension.prototype.unify = function () { - return this.convertTo({ length: 'px', duration: 's', angle: 'rad' }); -}; -Dimension.prototype.convertTo = function (conversions) { - var value = this.value, unit = this.unit.clone(), - i, groupName, group, targetUnit, derivedConversions = {}, applyUnit; - - if (typeof conversions === 'string') { - for (i in unitConversions) { - if (unitConversions[i].hasOwnProperty(conversions)) { - derivedConversions = {}; - derivedConversions[i] = conversions; + if (this.unit.isEmpty() || other.unit.isEmpty()) { + a = this; + b = other; + } else { + a = this.unify(); + b = other.unify(); + if (a.unit.compare(b.unit) !== 0) { + return undefined; } } - conversions = derivedConversions; + + return Node.numericCompare(a.value, b.value); + } + + unify() { + return this.convertTo({ length: 'px', duration: 's', angle: 'rad' }); } - applyUnit = function (atomicUnit, denominator) { - /* jshint loopfunc:true */ - if (group.hasOwnProperty(atomicUnit)) { - if (denominator) { - value = value / (group[atomicUnit] / group[targetUnit]); - } else { - value = value * (group[atomicUnit] / group[targetUnit]); - } - return targetUnit; + convertTo(conversions) { + let value = this.value; + const unit = this.unit.clone(); + let i; + let groupName; + let group; + let targetUnit; + let derivedConversions = {}; + let applyUnit; + + if (typeof conversions === 'string') { + for (i in unitConversions) { + if (unitConversions[i].hasOwnProperty(conversions)) { + derivedConversions = {}; + derivedConversions[i] = conversions; + } + } + conversions = derivedConversions; } + applyUnit = (atomicUnit, denominator) => { + /* jshint loopfunc:true */ + if (group.hasOwnProperty(atomicUnit)) { + if (denominator) { + value = value / (group[atomicUnit] / group[targetUnit]); + } else { + value = value * (group[atomicUnit] / group[targetUnit]); + } + + return targetUnit; + } - return atomicUnit; - }; + return atomicUnit; + }; - for (groupName in conversions) { - if (conversions.hasOwnProperty(groupName)) { - targetUnit = conversions[groupName]; - group = unitConversions[groupName]; + for (groupName in conversions) { + if (conversions.hasOwnProperty(groupName)) { + targetUnit = conversions[groupName]; + group = unitConversions[groupName]; - unit.map(applyUnit); + unit.map(applyUnit); + } } - } - unit.cancel(); + unit.cancel(); - return new Dimension(value, unit); -}; -module.exports = Dimension; + return new Dimension(value, unit); + } +} + +Dimension.prototype.type = 'Dimension'; +export default Dimension; diff --git a/lib/less/tree/element.js b/lib/less/tree/element.js index 13fa3b2ba..8bd79a327 100644 --- a/lib/less/tree/element.js +++ b/lib/less/tree/element.js @@ -1,64 +1,71 @@ -var Node = require('./node'), - Paren = require('./paren'), - Combinator = require('./combinator'); +import Node from './node'; +import Paren from './paren'; +import Combinator from './combinator'; -var Element = function (combinator, value, isVariable, index, currentFileInfo, visibilityInfo) { - this.combinator = combinator instanceof Combinator ? - combinator : new Combinator(combinator); +class Element extends Node { + constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) { + this.combinator = combinator instanceof Combinator ? + combinator : new Combinator(combinator); - if (typeof value === 'string') { - this.value = value.trim(); - } else if (value) { - this.value = value; - } else { - this.value = ''; + if (typeof value === 'string') { + this.value = value.trim(); + } else if (value) { + this.value = value; + } else { + this.value = ''; + } + this.isVariable = isVariable; + this._index = index; + this._fileInfo = currentFileInfo; + this.copyVisibilityInfo(visibilityInfo); + this.setParent(this.combinator, this); } - this.isVariable = isVariable; - this._index = index; - this._fileInfo = currentFileInfo; - this.copyVisibilityInfo(visibilityInfo); - this.setParent(this.combinator, this); -}; -Element.prototype = new Node(); -Element.prototype.type = 'Element'; -Element.prototype.accept = function (visitor) { - var value = this.value; - this.combinator = visitor.visit(this.combinator); - if (typeof value === 'object') { - this.value = visitor.visit(value); + + accept(visitor) { + const value = this.value; + this.combinator = visitor.visit(this.combinator); + if (typeof value === 'object') { + this.value = visitor.visit(value); + } + } + + eval(context) { + return new Element(this.combinator, + this.value.eval ? this.value.eval(context) : this.value, + this.isVariable, + this.getIndex(), + this.fileInfo(), this.visibilityInfo()); + } + + clone() { + return new Element(this.combinator, + this.value, + this.isVariable, + this.getIndex(), + this.fileInfo(), this.visibilityInfo()); } -}; -Element.prototype.eval = function (context) { - return new Element(this.combinator, - this.value.eval ? this.value.eval(context) : this.value, - this.isVariable, - this.getIndex(), - this.fileInfo(), this.visibilityInfo()); -}; -Element.prototype.clone = function () { - return new Element(this.combinator, - this.value, - this.isVariable, - this.getIndex(), - this.fileInfo(), this.visibilityInfo()); -}; -Element.prototype.genCSS = function (context, output) { - output.add(this.toCSS(context), this.fileInfo(), this.getIndex()); -}; -Element.prototype.toCSS = function (context) { - context = context || {}; - var value = this.value, firstSelector = context.firstSelector; - if (value instanceof Paren) { - // selector in parens should not be affected by outer selector - // flags (breaks only interpolated selectors - see #1973) - context.firstSelector = true; + + genCSS(context, output) { + output.add(this.toCSS(context), this.fileInfo(), this.getIndex()); } - value = value.toCSS ? value.toCSS(context) : value; - context.firstSelector = firstSelector; - if (value === '' && this.combinator.value.charAt(0) === '&') { - return ''; - } else { - return this.combinator.toCSS(context) + value; + + toCSS(context = {}) { + let value = this.value; + const firstSelector = context.firstSelector; + if (value instanceof Paren) { + // selector in parens should not be affected by outer selector + // flags (breaks only interpolated selectors - see #1973) + context.firstSelector = true; + } + value = value.toCSS ? value.toCSS(context) : value; + context.firstSelector = firstSelector; + if (value === '' && this.combinator.value.charAt(0) === '&') { + return ''; + } else { + return this.combinator.toCSS(context) + value; + } } -}; -module.exports = Element; +} + +Element.prototype.type = 'Element'; +export default Element; diff --git a/lib/less/tree/expression.js b/lib/less/tree/expression.js index 4587bcc2e..35ff4118b 100644 --- a/lib/less/tree/expression.js +++ b/lib/less/tree/expression.js @@ -1,65 +1,71 @@ -var Node = require('./node'), - Paren = require('./paren'), - Comment = require('./comment'), - Dimension = require('./dimension'), - MATH = require('../constants').Math; +import Node from './node'; +import Paren from './paren'; +import Comment from './comment'; +import Dimension from './dimension'; +import {Math as MATH} from '../constants'; -var Expression = function (value, noSpacing) { - this.value = value; - this.noSpacing = noSpacing; - if (!value) { - throw new Error('Expression requires an array parameter'); +class Expression extends Node { + constructor(value, noSpacing) { + this.value = value; + this.noSpacing = noSpacing; + if (!value) { + throw new Error('Expression requires an array parameter'); + } } -}; -Expression.prototype = new Node(); -Expression.prototype.type = 'Expression'; -Expression.prototype.accept = function (visitor) { - this.value = visitor.visitArray(this.value); -}; -Expression.prototype.eval = function (context) { - var returnValue, - mathOn = context.isMathOn(), - inParenthesis = this.parens && - (context.math !== MATH.STRICT_LEGACY || !this.parensInOp), - doubleParen = false; - if (inParenthesis) { - context.inParenthesis(); + + accept(visitor) { + this.value = visitor.visitArray(this.value); } - if (this.value.length > 1) { - returnValue = new Expression(this.value.map(function (e) { - if (!e.eval) { - return e; + + eval(context) { + let returnValue; + const mathOn = context.isMathOn(); + + const inParenthesis = this.parens && + (context.math !== MATH.STRICT_LEGACY || !this.parensInOp); + + let doubleParen = false; + if (inParenthesis) { + context.inParenthesis(); + } + if (this.value.length > 1) { + returnValue = new Expression(this.value.map(e => { + if (!e.eval) { + return e; + } + return e.eval(context); + }), this.noSpacing); + } else if (this.value.length === 1) { + if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) { + doubleParen = true; } - return e.eval(context); - }), this.noSpacing); - } else if (this.value.length === 1) { - if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) { - doubleParen = true; + returnValue = this.value[0].eval(context); + } else { + returnValue = this; } - returnValue = this.value[0].eval(context); - } else { - returnValue = this; - } - if (inParenthesis) { - context.outOfParenthesis(); - } - if (this.parens && this.parensInOp && !mathOn && !doubleParen - && (!(returnValue instanceof Dimension))) { - returnValue = new Paren(returnValue); + if (inParenthesis) { + context.outOfParenthesis(); + } + if (this.parens && this.parensInOp && !mathOn && !doubleParen + && (!(returnValue instanceof Dimension))) { + returnValue = new Paren(returnValue); + } + return returnValue; } - return returnValue; -}; -Expression.prototype.genCSS = function (context, output) { - for (var i = 0; i < this.value.length; i++) { - this.value[i].genCSS(context, output); - if (!this.noSpacing && i + 1 < this.value.length) { - output.add(' '); + + genCSS(context, output) { + for (let i = 0; i < this.value.length; i++) { + this.value[i].genCSS(context, output); + if (!this.noSpacing && i + 1 < this.value.length) { + output.add(' '); + } } } -}; -Expression.prototype.throwAwayComments = function () { - this.value = this.value.filter(function(v) { - return !(v instanceof Comment); - }); -}; -module.exports = Expression; + + throwAwayComments() { + this.value = this.value.filter(v => !(v instanceof Comment)); + } +} + +Expression.prototype.type = 'Expression'; +export default Expression; diff --git a/lib/less/tree/extend.js b/lib/less/tree/extend.js index a716fc74e..58e7cfd3f 100644 --- a/lib/less/tree/extend.js +++ b/lib/less/tree/extend.js @@ -1,58 +1,64 @@ -var Node = require('./node'), - Selector = require('./selector'); - -var Extend = function Extend(selector, option, index, currentFileInfo, visibilityInfo) { - this.selector = selector; - this.option = option; - this.object_id = Extend.next_id++; - this.parent_ids = [this.object_id]; - this._index = index; - this._fileInfo = currentFileInfo; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; - - switch (option) { - case 'all': - this.allowBefore = true; - this.allowAfter = true; - break; - default: - this.allowBefore = false; - this.allowAfter = false; - break; +import Node from './node'; +import Selector from './selector'; + +class Extend extends Node { + constructor(selector, option, index, currentFileInfo, visibilityInfo) { + this.selector = selector; + this.option = option; + this.object_id = Extend.next_id++; + this.parent_ids = [this.object_id]; + this._index = index; + this._fileInfo = currentFileInfo; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + + switch (option) { + case 'all': + this.allowBefore = true; + this.allowAfter = true; + break; + default: + this.allowBefore = false; + this.allowAfter = false; + break; + } + this.setParent(this.selector, this); } - this.setParent(this.selector, this); -}; -Extend.next_id = 0; -Extend.prototype = new Node(); -Extend.prototype.type = 'Extend'; -Extend.prototype.accept = function (visitor) { - this.selector = visitor.visit(this.selector); -}; -Extend.prototype.eval = function (context) { - return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); -}; -Extend.prototype.clone = function (context) { - return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); -}; -// it concatenates (joins) all selectors in selector array -Extend.prototype.findSelfSelectors = function (selectors) { - var selfElements = [], - i, - selectorElements; - - for (i = 0; i < selectors.length; i++) { - selectorElements = selectors[i].elements; - // duplicate the logic in genCSS function inside the selector node. - // future TODO - move both logics into the selector joiner visitor - if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') { - selectorElements[0].combinator.value = ' '; + accept(visitor) { + this.selector = visitor.visit(this.selector); + } + + eval(context) { + return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + + clone(context) { + return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + + // it concatenates (joins) all selectors in selector array + findSelfSelectors(selectors) { + let selfElements = []; + let i; + let selectorElements; + + for (i = 0; i < selectors.length; i++) { + selectorElements = selectors[i].elements; + // duplicate the logic in genCSS function inside the selector node. + // future TODO - move both logics into the selector joiner visitor + if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') { + selectorElements[0].combinator.value = ' '; + } + selfElements = selfElements.concat(selectors[i].elements); } - selfElements = selfElements.concat(selectors[i].elements); + + this.selfSelectors = [new Selector(selfElements)]; + this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo()); } +} + +Extend.next_id = 0; - this.selfSelectors = [new Selector(selfElements)]; - this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo()); -}; -module.exports = Extend; +Extend.prototype.type = 'Extend'; +export default Extend; diff --git a/lib/less/tree/import.js b/lib/less/tree/import.js index 8d2c0c8b7..37e169768 100644 --- a/lib/less/tree/import.js +++ b/lib/less/tree/import.js @@ -1,11 +1,11 @@ -var Node = require('./node'), - Media = require('./media'), - URL = require('./url'), - Quoted = require('./quoted'), - Ruleset = require('./ruleset'), - Anonymous = require('./anonymous'), - utils = require('../utils'), - LessError = require('../less-error'); +import Node from './node'; +import Media from './media'; +import URL from './url'; +import Quoted from './quoted'; +import Ruleset from './ruleset'; +import Anonymous from './anonymous'; +import utils from '../utils'; +import LessError from '../less-error'; // // CSS @import node @@ -19,163 +19,164 @@ var Node = require('./node'), // `import,push`, we also pass it a callback, which it'll call once // the file has been fetched, and parsed. // -var Import = function (path, features, options, index, currentFileInfo, visibilityInfo) { - this.options = options; - this._index = index; - this._fileInfo = currentFileInfo; - this.path = path; - this.features = features; - this.allowRoot = true; - - if (this.options.less !== undefined || this.options.inline) { - this.css = !this.options.less || this.options.inline; - } else { - var pathValue = this.getPath(); - if (pathValue && /[#\.\&\?]css([\?;].*)?$/.test(pathValue)) { - this.css = true; +class Import extends Node { + constructor(path, features, options, index, currentFileInfo, visibilityInfo) { + this.options = options; + this._index = index; + this._fileInfo = currentFileInfo; + this.path = path; + this.features = features; + this.allowRoot = true; + + if (this.options.less !== undefined || this.options.inline) { + this.css = !this.options.less || this.options.inline; + } else { + const pathValue = this.getPath(); + if (pathValue && /[#\.\&\?]css([\?;].*)?$/.test(pathValue)) { + this.css = true; + } } + this.copyVisibilityInfo(visibilityInfo); + this.setParent(this.features, this); + this.setParent(this.path, this); } - this.copyVisibilityInfo(visibilityInfo); - this.setParent(this.features, this); - this.setParent(this.path, this); -}; -// -// The actual import node doesn't return anything, when converted to CSS. -// The reason is that it's used at the evaluation stage, so that the rules -// it imports can be treated like any other rules. -// -// In `eval`, we make sure all Import nodes get evaluated, recursively, so -// we end up with a flat structure, which can easily be imported in the parent -// ruleset. -// -Import.prototype = new Node(); -Import.prototype.type = 'Import'; -Import.prototype.accept = function (visitor) { - if (this.features) { - this.features = visitor.visit(this.features); - } - this.path = visitor.visit(this.path); - if (!this.options.isPlugin && !this.options.inline && this.root) { - this.root = visitor.visit(this.root); - } -}; -Import.prototype.genCSS = function (context, output) { - if (this.css && this.path._fileInfo.reference === undefined) { - output.add('@import ', this._fileInfo, this._index); - this.path.genCSS(context, output); + accept(visitor) { if (this.features) { - output.add(' '); - this.features.genCSS(context, output); + this.features = visitor.visit(this.features); + } + this.path = visitor.visit(this.path); + if (!this.options.isPlugin && !this.options.inline && this.root) { + this.root = visitor.visit(this.root); } - output.add(';'); } -}; -Import.prototype.getPath = function () { - return (this.path instanceof URL) ? - this.path.value.value : this.path.value; -}; -Import.prototype.isVariableImport = function () { - var path = this.path; - if (path instanceof URL) { - path = path.value; + + genCSS(context, output) { + if (this.css && this.path._fileInfo.reference === undefined) { + output.add('@import ', this._fileInfo, this._index); + this.path.genCSS(context, output); + if (this.features) { + output.add(' '); + this.features.genCSS(context, output); + } + output.add(';'); + } } - if (path instanceof Quoted) { - return path.containsVariables(); + + getPath() { + return (this.path instanceof URL) ? + this.path.value.value : this.path.value; } - return true; -}; -Import.prototype.evalForImport = function (context) { - var path = this.path; + isVariableImport() { + let path = this.path; + if (path instanceof URL) { + path = path.value; + } + if (path instanceof Quoted) { + return path.containsVariables(); + } - if (path instanceof URL) { - path = path.value; + return true; } - return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo()); -}; -Import.prototype.evalPath = function (context) { - var path = this.path.eval(context); - var fileInfo = this._fileInfo; - - if (!(path instanceof URL)) { - // Add the rootpath if the URL requires a rewrite - var pathValue = path.value; - if (fileInfo && - pathValue && - context.pathRequiresRewrite(pathValue)) { - path.value = context.rewritePath(pathValue, fileInfo.rootpath); - } else { - path.value = context.normalizePath(path.value); + evalForImport(context) { + let path = this.path; + + if (path instanceof URL) { + path = path.value; } + + return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo()); } - return path; -}; -Import.prototype.eval = function (context) { - var result = this.doEval(context); - if (this.options.reference || this.blocksVisibility()) { - if (result.length || result.length === 0) { - result.forEach(function (node) { - node.addVisibilityBlock(); + evalPath(context) { + const path = this.path.eval(context); + const fileInfo = this._fileInfo; + + if (!(path instanceof URL)) { + // Add the rootpath if the URL requires a rewrite + const pathValue = path.value; + if (fileInfo && + pathValue && + context.pathRequiresRewrite(pathValue)) { + path.value = context.rewritePath(pathValue, fileInfo.rootpath); + } else { + path.value = context.normalizePath(path.value); } - ); - } else { - result.addVisibilityBlock(); } + + return path; } - return result; -}; -Import.prototype.doEval = function (context) { - var ruleset, registry, - features = this.features && this.features.eval(context); - - if (this.options.isPlugin) { - if (this.root && this.root.eval) { - try { - this.root.eval(context); - } - catch (e) { - e.message = 'Plugin error during evaluation'; - throw new LessError(e, this.root.imports, this.root.filename); + + eval(context) { + const result = this.doEval(context); + if (this.options.reference || this.blocksVisibility()) { + if (result.length || result.length === 0) { + result.forEach(node => { + node.addVisibilityBlock(); + } + ); + } else { + result.addVisibilityBlock(); } } - registry = context.frames[0] && context.frames[0].functionRegistry; - if ( registry && this.root && this.root.functions ) { - registry.addMultiple( this.root.functions ); - } - - return []; + return result; } - if (this.skip) { - if (typeof this.skip === 'function') { - this.skip = this.skip(); - } - if (this.skip) { + doEval(context) { + let ruleset; + let registry; + const features = this.features && this.features.eval(context); + + if (this.options.isPlugin) { + if (this.root && this.root.eval) { + try { + this.root.eval(context); + } + catch (e) { + e.message = 'Plugin error during evaluation'; + throw new LessError(e, this.root.imports, this.root.filename); + } + } + registry = context.frames[0] && context.frames[0].functionRegistry; + if ( registry && this.root && this.root.functions ) { + registry.addMultiple( this.root.functions ); + } + return []; } - } - if (this.options.inline) { - var contents = new Anonymous(this.root, 0, - { - filename: this.importedFilename, - reference: this.path._fileInfo && this.path._fileInfo.reference - }, true, true); - - return this.features ? new Media([contents], this.features.value) : [contents]; - } else if (this.css) { - var newImport = new Import(this.evalPath(context), features, this.options, this._index); - if (!newImport.css && this.error) { - throw this.error; + + if (this.skip) { + if (typeof this.skip === 'function') { + this.skip = this.skip(); + } + if (this.skip) { + return []; + } } - return newImport; - } else { - ruleset = new Ruleset(null, utils.copyArray(this.root.rules)); - ruleset.evalImports(context); + if (this.options.inline) { + const contents = new Anonymous(this.root, 0, + { + filename: this.importedFilename, + reference: this.path._fileInfo && this.path._fileInfo.reference + }, true, true); + + return this.features ? new Media([contents], this.features.value) : [contents]; + } else if (this.css) { + const newImport = new Import(this.evalPath(context), features, this.options, this._index); + if (!newImport.css && this.error) { + throw this.error; + } + return newImport; + } else { + ruleset = new Ruleset(null, utils.copyArray(this.root.rules)); + ruleset.evalImports(context); - return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules; + return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules; + } } -}; -module.exports = Import; +} + +Import.prototype.type = 'Import'; +export default Import; diff --git a/lib/less/tree/index.js b/lib/less/tree/index.js index d5972a604..4ea226da8 100644 --- a/lib/less/tree/index.js +++ b/lib/less/tree/index.js @@ -1,4 +1,4 @@ -var tree = Object.create(null); +const tree = Object.create(null); tree.Node = require('./node'); tree.Color = require('./color'); @@ -39,4 +39,4 @@ tree.Extend = require('./extend'); tree.VariableCall = require('./variable-call'); tree.NamespaceValue = require('./namespace-value'); -module.exports = tree; +export default tree; diff --git a/lib/less/tree/javascript.js b/lib/less/tree/javascript.js index 9e77e797d..0d63358ee 100644 --- a/lib/less/tree/javascript.js +++ b/lib/less/tree/javascript.js @@ -1,29 +1,31 @@ -var JsEvalNode = require('./js-eval-node'), - Dimension = require('./dimension'), - Quoted = require('./quoted'), - Anonymous = require('./anonymous'); +import JsEvalNode from './js-eval-node'; +import Dimension from './dimension'; +import Quoted from './quoted'; +import Anonymous from './anonymous'; -var JavaScript = function (string, escaped, index, currentFileInfo) { - this.escaped = escaped; - this.expression = string; - this._index = index; - this._fileInfo = currentFileInfo; -}; -JavaScript.prototype = new JsEvalNode(); -JavaScript.prototype.type = 'JavaScript'; -JavaScript.prototype.eval = function(context) { - var result = this.evaluateJavaScript(this.expression, context); - var type = typeof result; +class JavaScript extends JsEvalNode { + constructor(string, escaped, index, currentFileInfo) { + this.escaped = escaped; + this.expression = string; + this._index = index; + this._fileInfo = currentFileInfo; + } - if (type === 'number' && !isNaN(result)) { - return new Dimension(result); - } else if (type === 'string') { - return new Quoted('"' + result + '"', result, this.escaped, this._index); - } else if (Array.isArray(result)) { - return new Anonymous(result.join(', ')); - } else { - return new Anonymous(result); + eval(context) { + const result = this.evaluateJavaScript(this.expression, context); + const type = typeof result; + + if (type === 'number' && !isNaN(result)) { + return new Dimension(result); + } else if (type === 'string') { + return new Quoted(`"${result}"`, result, this.escaped, this._index); + } else if (Array.isArray(result)) { + return new Anonymous(result.join(', ')); + } else { + return new Anonymous(result); + } } -}; +} -module.exports = JavaScript; +JavaScript.prototype.type = 'JavaScript'; +export default JavaScript; diff --git a/lib/less/tree/js-eval-node.js b/lib/less/tree/js-eval-node.js index f168fe9d7..8e56a649a 100644 --- a/lib/less/tree/js-eval-node.js +++ b/lib/less/tree/js-eval-node.js @@ -1,14 +1,14 @@ -var Node = require('./node'), - Variable = require('./variable'); +import Node from './node'; +import Variable from './variable'; -var JsEvalNode = function() { +const JsEvalNode = () => { }; JsEvalNode.prototype = new Node(); JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { - var result, - that = this, - evalContext = {}; + let result; + const that = this; + const evalContext = {}; if (!context.javascriptEnabled) { throw { message: 'Inline JavaScript is not enabled. Is it set in your options?', @@ -16,20 +16,18 @@ JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { index: this.getIndex() }; } - expression = expression.replace(/@\{([\w-]+)\}/g, function (_, name) { - return that.jsify(new Variable('@' + name, that.getIndex(), that.fileInfo()).eval(context)); - }); + expression = expression.replace(/@\{([\w-]+)\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context))); try { - expression = new Function('return (' + expression + ')'); + expression = new Function(`return (${expression})`); } catch (e) { - throw { message: 'JavaScript evaluation error: ' + e.message + ' from `' + expression + '`' , + throw { message: `JavaScript evaluation error: ${e.message} from \`${expression}\`` , filename: this.fileInfo().filename, index: this.getIndex() }; } - var variables = context.frames[0].variables(); - for (var k in variables) { + const variables = context.frames[0].variables(); + for (const k in variables) { if (variables.hasOwnProperty(k)) { /* jshint loopfunc:true */ evalContext[k.slice(1)] = { @@ -44,18 +42,18 @@ JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { try { result = expression.call(evalContext); } catch (e) { - throw { message: 'JavaScript evaluation error: \'' + e.name + ': ' + e.message.replace(/["]/g, '\'') + '\'' , + throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/["]/g, '\'')}'` , filename: this.fileInfo().filename, index: this.getIndex() }; } return result; }; -JsEvalNode.prototype.jsify = function (obj) { +JsEvalNode.prototype.jsify = obj => { if (Array.isArray(obj.value) && (obj.value.length > 1)) { - return '[' + obj.value.map(function (v) { return v.toCSS(); }).join(', ') + ']'; + return `[${obj.value.map(v => v.toCSS()).join(', ')}]`; } else { return obj.toCSS(); } }; -module.exports = JsEvalNode; +export default JsEvalNode; diff --git a/lib/less/tree/keyword.js b/lib/less/tree/keyword.js index 16c0b8700..1b5bc4efd 100644 --- a/lib/less/tree/keyword.js +++ b/lib/less/tree/keyword.js @@ -1,14 +1,17 @@ -var Node = require('./node'); +import Node from './node'; + +class Keyword extends Node { + constructor(value) { this.value = value; } + + genCSS(context, output) { + if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; } + output.add(this.value); + } +} -var Keyword = function (value) { this.value = value; }; -Keyword.prototype = new Node(); Keyword.prototype.type = 'Keyword'; -Keyword.prototype.genCSS = function (context, output) { - if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; } - output.add(this.value); -}; Keyword.True = new Keyword('true'); Keyword.False = new Keyword('false'); -module.exports = Keyword; +export default Keyword; diff --git a/lib/less/tree/media.js b/lib/less/tree/media.js index cda552668..625fd039a 100644 --- a/lib/less/tree/media.js +++ b/lib/less/tree/media.js @@ -1,141 +1,152 @@ -var Ruleset = require('./ruleset'), - Value = require('./value'), - Selector = require('./selector'), - Anonymous = require('./anonymous'), - Expression = require('./expression'), - AtRule = require('./atrule'), - utils = require('../utils'); - -var Media = function (value, features, index, currentFileInfo, visibilityInfo) { - this._index = index; - this._fileInfo = currentFileInfo; - - var selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors(); - - this.features = new Value(features); - this.rules = [new Ruleset(selectors, value)]; - this.rules[0].allowImports = true; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; - this.setParent(selectors, this); - this.setParent(this.features, this); - this.setParent(this.rules, this); -}; -Media.prototype = new AtRule(); -Media.prototype.type = 'Media'; -Media.prototype.isRulesetLike = function() { return true; }; -Media.prototype.accept = function (visitor) { - if (this.features) { - this.features = visitor.visit(this.features); +import Ruleset from './ruleset'; +import Value from './value'; +import Selector from './selector'; +import Anonymous from './anonymous'; +import Expression from './expression'; +import AtRule from './atrule'; +import utils from '../utils'; + +class Media extends AtRule { + constructor(value, features, index, currentFileInfo, visibilityInfo) { + this._index = index; + this._fileInfo = currentFileInfo; + + const selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors(); + + this.features = new Value(features); + this.rules = [new Ruleset(selectors, value)]; + this.rules[0].allowImports = true; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + this.setParent(selectors, this); + this.setParent(this.features, this); + this.setParent(this.rules, this); } - if (this.rules) { - this.rules = visitor.visitArray(this.rules); + + isRulesetLike() { + return true; } -}; -Media.prototype.genCSS = function (context, output) { - output.add('@media ', this._fileInfo, this._index); - this.features.genCSS(context, output); - this.outputRuleset(context, output, this.rules); -}; -Media.prototype.eval = function (context) { - if (!context.mediaBlocks) { - context.mediaBlocks = []; - context.mediaPath = []; + + accept(visitor) { + if (this.features) { + this.features = visitor.visit(this.features); + } + if (this.rules) { + this.rules = visitor.visitArray(this.rules); + } } - var media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo()); - if (this.debugInfo) { - this.rules[0].debugInfo = this.debugInfo; - media.debugInfo = this.debugInfo; + genCSS(context, output) { + output.add('@media ', this._fileInfo, this._index); + this.features.genCSS(context, output); + this.outputRuleset(context, output, this.rules); } - - media.features = this.features.eval(context); - - context.mediaPath.push(media); - context.mediaBlocks.push(media); - - this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit(); - context.frames.unshift(this.rules[0]); - media.rules = [this.rules[0].eval(context)]; - context.frames.shift(); - - context.mediaPath.pop(); - - return context.mediaPath.length === 0 ? media.evalTop(context) : - media.evalNested(context); -}; -Media.prototype.evalTop = function (context) { - var result = this; - - // Render all dependent Media blocks. - if (context.mediaBlocks.length > 1) { - var selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors(); - result = new Ruleset(selectors, context.mediaBlocks); - result.multiMedia = true; - result.copyVisibilityInfo(this.visibilityInfo()); - this.setParent(result, this); + + eval(context) { + if (!context.mediaBlocks) { + context.mediaBlocks = []; + context.mediaPath = []; + } + + const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo()); + if (this.debugInfo) { + this.rules[0].debugInfo = this.debugInfo; + media.debugInfo = this.debugInfo; + } + + media.features = this.features.eval(context); + + context.mediaPath.push(media); + context.mediaBlocks.push(media); + + this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit(); + context.frames.unshift(this.rules[0]); + media.rules = [this.rules[0].eval(context)]; + context.frames.shift(); + + context.mediaPath.pop(); + + return context.mediaPath.length === 0 ? media.evalTop(context) : + media.evalNested(context); } - delete context.mediaBlocks; - delete context.mediaPath; + evalTop(context) { + let result = this; - return result; -}; -Media.prototype.evalNested = function (context) { - var i, value, - path = context.mediaPath.concat([this]); + // Render all dependent Media blocks. + if (context.mediaBlocks.length > 1) { + const selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors(); + result = new Ruleset(selectors, context.mediaBlocks); + result.multiMedia = true; + result.copyVisibilityInfo(this.visibilityInfo()); + this.setParent(result, this); + } - // Extract the media-query conditions separated with `,` (OR). - for (i = 0; i < path.length; i++) { - value = path[i].features instanceof Value ? - path[i].features.value : path[i].features; - path[i] = Array.isArray(value) ? value : [value]; + delete context.mediaBlocks; + delete context.mediaPath; + + return result; } - // Trace all permutations to generate the resulting media-query. - // - // (a, b and c) with nested (d, e) -> - // a and d - // a and e - // b and c and d - // b and c and e - this.features = new Value(this.permute(path).map(function (path) { - path = path.map(function (fragment) { - return fragment.toCSS ? fragment : new Anonymous(fragment); - }); - - for (i = path.length - 1; i > 0; i--) { - path.splice(i, 0, new Anonymous('and')); + evalNested(context) { + let i; + let value; + const path = context.mediaPath.concat([this]); + + // Extract the media-query conditions separated with `,` (OR). + for (i = 0; i < path.length; i++) { + value = path[i].features instanceof Value ? + path[i].features.value : path[i].features; + path[i] = Array.isArray(value) ? value : [value]; } - return new Expression(path); - })); - this.setParent(this.features, this); - - // Fake a tree-node that doesn't output anything. - return new Ruleset([], []); -}; -Media.prototype.permute = function (arr) { - if (arr.length === 0) { - return []; - } else if (arr.length === 1) { - return arr[0]; - } else { - var result = []; - var rest = this.permute(arr.slice(1)); - for (var i = 0; i < rest.length; i++) { - for (var j = 0; j < arr[0].length; j++) { - result.push([arr[0][j]].concat(rest[i])); + // Trace all permutations to generate the resulting media-query. + // + // (a, b and c) with nested (d, e) -> + // a and d + // a and e + // b and c and d + // b and c and e + this.features = new Value(this.permute(path).map(path => { + path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment)); + + for (i = path.length - 1; i > 0; i--) { + path.splice(i, 0, new Anonymous('and')); } + + return new Expression(path); + })); + this.setParent(this.features, this); + + // Fake a tree-node that doesn't output anything. + return new Ruleset([], []); + } + + permute(arr) { + if (arr.length === 0) { + return []; + } else if (arr.length === 1) { + return arr[0]; + } else { + const result = []; + const rest = this.permute(arr.slice(1)); + for (let i = 0; i < rest.length; i++) { + for (let j = 0; j < arr[0].length; j++) { + result.push([arr[0][j]].concat(rest[i])); + } + } + return result; } - return result; } -}; -Media.prototype.bubbleSelectors = function (selectors) { - if (!selectors) { - return; + + bubbleSelectors(selectors) { + if (!selectors) { + return; + } + this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])]; + this.setParent(this.rules, this); } - this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])]; - this.setParent(this.rules, this); -}; -module.exports = Media; +} + +Media.prototype.type = 'Media'; +export default Media; diff --git a/lib/less/tree/mixin-call.js b/lib/less/tree/mixin-call.js index 49784f02a..986b63e67 100644 --- a/lib/less/tree/mixin-call.js +++ b/lib/less/tree/mixin-call.js @@ -1,186 +1,213 @@ -var Node = require('./node'), - Selector = require('./selector'), - MixinDefinition = require('./mixin-definition'), - defaultFunc = require('../functions/default'); - -var MixinCall = function (elements, args, index, currentFileInfo, important) { - this.selector = new Selector(elements); - this.arguments = args || []; - this._index = index; - this._fileInfo = currentFileInfo; - this.important = important; - this.allowRoot = true; - this.setParent(this.selector, this); -}; -MixinCall.prototype = new Node(); -MixinCall.prototype.type = 'MixinCall'; -MixinCall.prototype.accept = function (visitor) { - if (this.selector) { - this.selector = visitor.visit(this.selector); +import Node from './node'; +import Selector from './selector'; +import MixinDefinition from './mixin-definition'; +import defaultFunc from '../functions/default'; + +class MixinCall extends Node { + constructor(elements, args, index, currentFileInfo, important) { + this.selector = new Selector(elements); + this.arguments = args || []; + this._index = index; + this._fileInfo = currentFileInfo; + this.important = important; + this.allowRoot = true; + this.setParent(this.selector, this); } - if (this.arguments.length) { - this.arguments = visitor.visitArray(this.arguments); + + accept(visitor) { + if (this.selector) { + this.selector = visitor.visit(this.selector); + } + if (this.arguments.length) { + this.arguments = visitor.visitArray(this.arguments); + } } -}; -MixinCall.prototype.eval = function (context) { - var mixins, mixin, mixinPath, args = [], arg, argValue, - rules = [], match = false, i, m, f, isRecursive, isOneFound, - candidates = [], candidate, conditionResult = [], defaultResult, defFalseEitherCase = -1, - defNone = 0, defTrue = 1, defFalse = 2, count, originalRuleset, noArgumentsFilter; - - this.selector = this.selector.eval(context); - - function calcDefGroup(mixin, mixinPath) { - var f, p, namespace; - - for (f = 0; f < 2; f++) { - conditionResult[f] = true; - defaultFunc.value(f); - for (p = 0; p < mixinPath.length && conditionResult[f]; p++) { - namespace = mixinPath[p]; - if (namespace.matchCondition) { - conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context); + + eval(context) { + let mixins; + let mixin; + let mixinPath; + const args = []; + let arg; + let argValue; + const rules = []; + let match = false; + let i; + let m; + let f; + let isRecursive; + let isOneFound; + const candidates = []; + let candidate; + const conditionResult = []; + let defaultResult; + const defFalseEitherCase = -1; + const defNone = 0; + const defTrue = 1; + const defFalse = 2; + let count; + let originalRuleset; + let noArgumentsFilter; + + this.selector = this.selector.eval(context); + + function calcDefGroup(mixin, mixinPath) { + let f; + let p; + let namespace; + + for (f = 0; f < 2; f++) { + conditionResult[f] = true; + defaultFunc.value(f); + for (p = 0; p < mixinPath.length && conditionResult[f]; p++) { + namespace = mixinPath[p]; + if (namespace.matchCondition) { + conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context); + } + } + if (mixin.matchCondition) { + conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context); } } - if (mixin.matchCondition) { - conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context); + if (conditionResult[0] || conditionResult[1]) { + if (conditionResult[0] != conditionResult[1]) { + return conditionResult[1] ? + defTrue : defFalse; + } + + return defNone; } + return defFalseEitherCase; } - if (conditionResult[0] || conditionResult[1]) { - if (conditionResult[0] != conditionResult[1]) { - return conditionResult[1] ? - defTrue : defFalse; - } - return defNone; - } - return defFalseEitherCase; - } - - for (i = 0; i < this.arguments.length; i++) { - arg = this.arguments[i]; - argValue = arg.value.eval(context); - if (arg.expand && Array.isArray(argValue.value)) { - argValue = argValue.value; - for (m = 0; m < argValue.length; m++) { - args.push({value: argValue[m]}); + for (i = 0; i < this.arguments.length; i++) { + arg = this.arguments[i]; + argValue = arg.value.eval(context); + if (arg.expand && Array.isArray(argValue.value)) { + argValue = argValue.value; + for (m = 0; m < argValue.length; m++) { + args.push({value: argValue[m]}); + } + } else { + args.push({name: arg.name, value: argValue}); } - } else { - args.push({name: arg.name, value: argValue}); } - } - noArgumentsFilter = function(rule) {return rule.matchArgs(null, context);}; - - for (i = 0; i < context.frames.length; i++) { - if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) { - isOneFound = true; - - // To make `default()` function independent of definition order we have two "subpasses" here. - // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`), - // and build candidate list with corresponding flags. Then, when we know all possible matches, - // we make a final decision. - - for (m = 0; m < mixins.length; m++) { - mixin = mixins[m].rule; - mixinPath = mixins[m].path; - isRecursive = false; - for (f = 0; f < context.frames.length; f++) { - if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) { - isRecursive = true; - break; + noArgumentsFilter = rule => rule.matchArgs(null, context); + + for (i = 0; i < context.frames.length; i++) { + if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) { + isOneFound = true; + + // To make `default()` function independent of definition order we have two "subpasses" here. + // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`), + // and build candidate list with corresponding flags. Then, when we know all possible matches, + // we make a final decision. + + for (m = 0; m < mixins.length; m++) { + mixin = mixins[m].rule; + mixinPath = mixins[m].path; + isRecursive = false; + for (f = 0; f < context.frames.length; f++) { + if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) { + isRecursive = true; + break; + } + } + if (isRecursive) { + continue; } - } - if (isRecursive) { - continue; - } - if (mixin.matchArgs(args, context)) { - candidate = {mixin: mixin, group: calcDefGroup(mixin, mixinPath)}; + if (mixin.matchArgs(args, context)) { + candidate = {mixin, group: calcDefGroup(mixin, mixinPath)}; - if (candidate.group !== defFalseEitherCase) { - candidates.push(candidate); - } + if (candidate.group !== defFalseEitherCase) { + candidates.push(candidate); + } - match = true; + match = true; + } } - } - defaultFunc.reset(); + defaultFunc.reset(); - count = [0, 0, 0]; - for (m = 0; m < candidates.length; m++) { - count[candidates[m].group]++; - } + count = [0, 0, 0]; + for (m = 0; m < candidates.length; m++) { + count[candidates[m].group]++; + } - if (count[defNone] > 0) { - defaultResult = defFalse; - } else { - defaultResult = defTrue; - if ((count[defTrue] + count[defFalse]) > 1) { - throw { type: 'Runtime', - message: 'Ambiguous use of `default()` found when matching for `' + this.format(args) + '`', - index: this.getIndex(), filename: this.fileInfo().filename }; + if (count[defNone] > 0) { + defaultResult = defFalse; + } else { + defaultResult = defTrue; + if ((count[defTrue] + count[defFalse]) > 1) { + throw { type: 'Runtime', + message: `Ambiguous use of \`default()\` found when matching for \`${this.format(args)}\``, + index: this.getIndex(), filename: this.fileInfo().filename }; + } } - } - for (m = 0; m < candidates.length; m++) { - candidate = candidates[m].group; - if ((candidate === defNone) || (candidate === defaultResult)) { - try { - mixin = candidates[m].mixin; - if (!(mixin instanceof MixinDefinition)) { - originalRuleset = mixin.originalRuleset || mixin; - mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo()); - mixin.originalRuleset = originalRuleset; + for (m = 0; m < candidates.length; m++) { + candidate = candidates[m].group; + if ((candidate === defNone) || (candidate === defaultResult)) { + try { + mixin = candidates[m].mixin; + if (!(mixin instanceof MixinDefinition)) { + originalRuleset = mixin.originalRuleset || mixin; + mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo()); + mixin.originalRuleset = originalRuleset; + } + const newRules = mixin.evalCall(context, args, this.important).rules; + this._setVisibilityToReplacement(newRules); + Array.prototype.push.apply(rules, newRules); + } catch (e) { + throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack }; } - var newRules = mixin.evalCall(context, args, this.important).rules; - this._setVisibilityToReplacement(newRules); - Array.prototype.push.apply(rules, newRules); - } catch (e) { - throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack }; } } - } - if (match) { - return rules; + if (match) { + return rules; + } } } + if (isOneFound) { + throw { type: 'Runtime', + message: `No matching definition was found for \`${this.format(args)}\``, + index: this.getIndex(), filename: this.fileInfo().filename }; + } else { + throw { type: 'Name', + message: `${this.selector.toCSS().trim()} is undefined`, + index: this.getIndex(), filename: this.fileInfo().filename }; + } } - if (isOneFound) { - throw { type: 'Runtime', - message: 'No matching definition was found for `' + this.format(args) + '`', - index: this.getIndex(), filename: this.fileInfo().filename }; - } else { - throw { type: 'Name', - message: this.selector.toCSS().trim() + ' is undefined', - index: this.getIndex(), filename: this.fileInfo().filename }; + + _setVisibilityToReplacement(replacement) { + let i; + let rule; + if (this.blocksVisibility()) { + for (i = 0; i < replacement.length; i++) { + rule = replacement[i]; + rule.addVisibilityBlock(); + } + } } -}; - -MixinCall.prototype._setVisibilityToReplacement = function (replacement) { - var i, rule; - if (this.blocksVisibility()) { - for (i = 0; i < replacement.length; i++) { - rule = replacement[i]; - rule.addVisibilityBlock(); + + format(args) { + return `${this.selector.toCSS().trim()}(${args ? args.map(a => { + let argValue = ''; + if (a.name) { + argValue += `${a.name}:`; + } + if (a.value.toCSS) { + argValue += a.value.toCSS(); + } else { + argValue += '???'; } + return argValue; + }).join(', ') : ''})`; } -}; -MixinCall.prototype.format = function (args) { - return this.selector.toCSS().trim() + '(' + - (args ? args.map(function (a) { - var argValue = ''; - if (a.name) { - argValue += a.name + ':'; - } - if (a.value.toCSS) { - argValue += a.value.toCSS(); - } else { - argValue += '???'; - } - return argValue; - }).join(', ') : '') + ')'; -}; -module.exports = MixinCall; +} + +MixinCall.prototype.type = 'MixinCall'; +export default MixinCall; diff --git a/lib/less/tree/mixin-definition.js b/lib/less/tree/mixin-definition.js index 3d0cc6252..6b4c5bcb2 100644 --- a/lib/less/tree/mixin-definition.js +++ b/lib/less/tree/mixin-definition.js @@ -1,209 +1,227 @@ -var Selector = require('./selector'), - Element = require('./element'), - Ruleset = require('./ruleset'), - Declaration = require('./declaration'), - DetachedRuleset = require('./detached-ruleset'), - Expression = require('./expression'), - contexts = require('../contexts'), - utils = require('../utils'); - -var Definition = function (name, params, rules, condition, variadic, frames, visibilityInfo) { - this.name = name || 'anonymous mixin'; - this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])]; - this.params = params; - this.condition = condition; - this.variadic = variadic; - this.arity = params.length; - this.rules = rules; - this._lookups = {}; - var optionalParameters = []; - this.required = params.reduce(function (count, p) { - if (!p.name || (p.name && !p.value)) { - return count + 1; +import Selector from './selector'; +import Element from './element'; +import Ruleset from './ruleset'; +import Declaration from './declaration'; +import DetachedRuleset from './detached-ruleset'; +import Expression from './expression'; +import contexts from '../contexts'; +import utils from '../utils'; + +class Definition extends Ruleset { + constructor(name, params, rules, condition, variadic, frames, visibilityInfo) { + this.name = name || 'anonymous mixin'; + this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])]; + this.params = params; + this.condition = condition; + this.variadic = variadic; + this.arity = params.length; + this.rules = rules; + this._lookups = {}; + const optionalParameters = []; + this.required = params.reduce((count, p) => { + if (!p.name || (p.name && !p.value)) { + return count + 1; + } + else { + optionalParameters.push(p.name); + return count; + } + }, 0); + this.optionalParameters = optionalParameters; + this.frames = frames; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + } + + accept(visitor) { + if (this.params && this.params.length) { + this.params = visitor.visitArray(this.params); } - else { - optionalParameters.push(p.name); - return count; + this.rules = visitor.visitArray(this.rules); + if (this.condition) { + this.condition = visitor.visit(this.condition); } - }, 0); - this.optionalParameters = optionalParameters; - this.frames = frames; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; -}; -Definition.prototype = new Ruleset(); -Definition.prototype.type = 'MixinDefinition'; -Definition.prototype.evalFirst = true; -Definition.prototype.accept = function (visitor) { - if (this.params && this.params.length) { - this.params = visitor.visitArray(this.params); - } - this.rules = visitor.visitArray(this.rules); - if (this.condition) { - this.condition = visitor.visit(this.condition); } -}; -Definition.prototype.evalParams = function (context, mixinEnv, args, evaldArguments) { - /* jshint boss:true */ - var frame = new Ruleset(null, null), - varargs, arg, - params = utils.copyArray(this.params), - i, j, val, name, isNamedFound, argIndex, argsLength = 0; - - if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) { - frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit(); - } - mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames)); - - if (args) { - args = utils.copyArray(args); - argsLength = args.length; - - for (i = 0; i < argsLength; i++) { - arg = args[i]; - if (name = (arg && arg.name)) { - isNamedFound = false; - for (j = 0; j < params.length; j++) { - if (!evaldArguments[j] && name === params[j].name) { - evaldArguments[j] = arg.value.eval(context); - frame.prependRule(new Declaration(name, arg.value.eval(context))); - isNamedFound = true; - break; + + evalParams(context, mixinEnv, args, evaldArguments) { + /* jshint boss:true */ + const frame = new Ruleset(null, null); + + let varargs; + let arg; + const params = utils.copyArray(this.params); + let i; + let j; + let val; + let name; + let isNamedFound; + let argIndex; + let argsLength = 0; + + if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) { + frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit(); + } + mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames)); + + if (args) { + args = utils.copyArray(args); + argsLength = args.length; + + for (i = 0; i < argsLength; i++) { + arg = args[i]; + if (name = (arg && arg.name)) { + isNamedFound = false; + for (j = 0; j < params.length; j++) { + if (!evaldArguments[j] && name === params[j].name) { + evaldArguments[j] = arg.value.eval(context); + frame.prependRule(new Declaration(name, arg.value.eval(context))); + isNamedFound = true; + break; + } + } + if (isNamedFound) { + args.splice(i, 1); + i--; + continue; + } else { + throw { type: 'Runtime', message: `Named argument for ${this.name} ${args[i].name} not found` }; } - } - if (isNamedFound) { - args.splice(i, 1); - i--; - continue; - } else { - throw { type: 'Runtime', message: 'Named argument for ' + this.name + - ' ' + args[i].name + ' not found' }; } } } - } - argIndex = 0; - for (i = 0; i < params.length; i++) { - if (evaldArguments[i]) { continue; } + argIndex = 0; + for (i = 0; i < params.length; i++) { + if (evaldArguments[i]) { continue; } - arg = args && args[argIndex]; + arg = args && args[argIndex]; - if (name = params[i].name) { - if (params[i].variadic) { - varargs = []; - for (j = argIndex; j < argsLength; j++) { - varargs.push(args[j].value.eval(context)); - } - frame.prependRule(new Declaration(name, new Expression(varargs).eval(context))); - } else { - val = arg && arg.value; - if (val) { - // This was a mixin call, pass in a detached ruleset of it's eval'd rules - if (Array.isArray(val)) { - val = new DetachedRuleset(new Ruleset('', val)); - } - else { - val = val.eval(context); + if (name = params[i].name) { + if (params[i].variadic) { + varargs = []; + for (j = argIndex; j < argsLength; j++) { + varargs.push(args[j].value.eval(context)); } - } else if (params[i].value) { - val = params[i].value.eval(mixinEnv); - frame.resetCache(); + frame.prependRule(new Declaration(name, new Expression(varargs).eval(context))); } else { - throw { type: 'Runtime', message: 'wrong number of arguments for ' + this.name + - ' (' + argsLength + ' for ' + this.arity + ')' }; - } + val = arg && arg.value; + if (val) { + // This was a mixin call, pass in a detached ruleset of it's eval'd rules + if (Array.isArray(val)) { + val = new DetachedRuleset(new Ruleset('', val)); + } + else { + val = val.eval(context); + } + } else if (params[i].value) { + val = params[i].value.eval(mixinEnv); + frame.resetCache(); + } else { + throw { type: 'Runtime', message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` }; + } - frame.prependRule(new Declaration(name, val)); - evaldArguments[i] = val; + frame.prependRule(new Declaration(name, val)); + evaldArguments[i] = val; + } } - } - if (params[i].variadic && args) { - for (j = argIndex; j < argsLength; j++) { - evaldArguments[j] = args[j].value.eval(context); + if (params[i].variadic && args) { + for (j = argIndex; j < argsLength; j++) { + evaldArguments[j] = args[j].value.eval(context); + } } + argIndex++; } - argIndex++; + + return frame; } - return frame; -}; -Definition.prototype.makeImportant = function() { - var rules = !this.rules ? this.rules : this.rules.map(function (r) { - if (r.makeImportant) { - return r.makeImportant(true); - } else { - return r; - } - }); - var result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames); - return result; -}; -Definition.prototype.eval = function (context) { - return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames)); -}; -Definition.prototype.evalCall = function (context, args, important) { - var _arguments = [], - mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames, - frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments), - rules, ruleset; - - frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context))); - - rules = utils.copyArray(this.rules); - - ruleset = new Ruleset(null, rules); - ruleset.originalRuleset = this; - ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames))); - if (important) { - ruleset = ruleset.makeImportant(); + makeImportant() { + const rules = !this.rules ? this.rules : this.rules.map(r => { + if (r.makeImportant) { + return r.makeImportant(true); + } else { + return r; + } + }); + const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames); + return result; } - return ruleset; -}; -Definition.prototype.matchCondition = function (args, context) { - if (this.condition && !this.condition.eval( - new contexts.Eval(context, - [this.evalParams(context, /* the parameter variables */ - new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])] - .concat(this.frames || []) // the parent namespace/mixin frames - .concat(context.frames)))) { // the current environment frames - return false; + + eval(context) { + return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames)); } - return true; -}; -Definition.prototype.matchArgs = function (args, context) { - var allArgsCnt = (args && args.length) || 0, len, optionalParameters = this.optionalParameters; - var requiredArgsCnt = !args ? 0 : args.reduce(function (count, p) { - if (optionalParameters.indexOf(p.name) < 0) { - return count + 1; - } else { - return count; - } - }, 0); - if (!this.variadic) { - if (requiredArgsCnt < this.required) { - return false; - } - if (allArgsCnt > this.params.length) { - return false; + evalCall(context, args, important) { + const _arguments = []; + const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames; + const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments); + let rules; + let ruleset; + + frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context))); + + rules = utils.copyArray(this.rules); + + ruleset = new Ruleset(null, rules); + ruleset.originalRuleset = this; + ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames))); + if (important) { + ruleset = ruleset.makeImportant(); } - } else { - if (requiredArgsCnt < (this.required - 1)) { + return ruleset; + } + + matchCondition(args, context) { + if (this.condition && !this.condition.eval( + new contexts.Eval(context, + [this.evalParams(context, /* the parameter variables */ + new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])] + .concat(this.frames || []) // the parent namespace/mixin frames + .concat(context.frames)))) { // the current environment frames return false; } + return true; } - // check patterns - len = Math.min(requiredArgsCnt, this.arity); + matchArgs(args, context) { + const allArgsCnt = (args && args.length) || 0; + let len; + const optionalParameters = this.optionalParameters; + const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => { + if (optionalParameters.indexOf(p.name) < 0) { + return count + 1; + } else { + return count; + } + }, 0); - for (var i = 0; i < len; i++) { - if (!this.params[i].name && !this.params[i].variadic) { - if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) { + if (!this.variadic) { + if (requiredArgsCnt < this.required) { + return false; + } + if (allArgsCnt > this.params.length) { + return false; + } + } else { + if (requiredArgsCnt < (this.required - 1)) { return false; } } + + // check patterns + len = Math.min(requiredArgsCnt, this.arity); + + for (let i = 0; i < len; i++) { + if (!this.params[i].name && !this.params[i].variadic) { + if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) { + return false; + } + } + } + return true; } - return true; -}; -module.exports = Definition; +} + +Definition.prototype.type = 'MixinDefinition'; +Definition.prototype.evalFirst = true; +export default Definition; diff --git a/lib/less/tree/namespace-value.js b/lib/less/tree/namespace-value.js index 3ef109cc9..cbe986fdf 100644 --- a/lib/less/tree/namespace-value.js +++ b/lib/less/tree/namespace-value.js @@ -1,79 +1,85 @@ -var Node = require('./node'), - Variable = require('./variable'), - Ruleset = require('./ruleset'), - Selector = require('./selector'); +import Node from './node'; +import Variable from './variable'; +import Ruleset from './ruleset'; +import Selector from './selector'; -var NamespaceValue = function (ruleCall, lookups, important, index, fileInfo) { - this.value = ruleCall; - this.lookups = lookups; - this.important = important; - this._index = index; - this._fileInfo = fileInfo; -}; -NamespaceValue.prototype = new Node(); -NamespaceValue.prototype.type = 'NamespaceValue'; -NamespaceValue.prototype.eval = function (context) { - var i, j, name, rules = this.value.eval(context); - - for (i = 0; i < this.lookups.length; i++) { - name = this.lookups[i]; +class NamespaceValue extends Node { + constructor(ruleCall, lookups, important, index, fileInfo) { + this.value = ruleCall; + this.lookups = lookups; + this.important = important; + this._index = index; + this._fileInfo = fileInfo; + } - /** - * Eval'd DRs return rulesets. - * Eval'd mixins return rules, so let's make a ruleset if we need it. - * We need to do this because of late parsing of values - */ - if (Array.isArray(rules)) { - rules = new Ruleset([new Selector()], rules); - } + eval(context) { + let i; + let j; + let name; + let rules = this.value.eval(context); - if (name === '') { - rules = rules.lastDeclaration(); - } - else if (name.charAt(0) === '@') { - if (name.charAt(1) === '@') { - name = '@' + new Variable(name.substr(1)).eval(context).value; - } - if (rules.variables) { - rules = rules.variable(name); + for (i = 0; i < this.lookups.length; i++) { + name = this.lookups[i]; + + /** + * Eval'd DRs return rulesets. + * Eval'd mixins return rules, so let's make a ruleset if we need it. + * We need to do this because of late parsing of values + */ + if (Array.isArray(rules)) { + rules = new Ruleset([new Selector()], rules); } - - if (!rules) { - throw { type: 'Name', - message: 'variable ' + name + ' not found', - filename: this.fileInfo().filename, - index: this.getIndex() }; + + if (name === '') { + rules = rules.lastDeclaration(); } - } - else { - if (name.substring(0, 2) === '$@') { - name = '$' + new Variable(name.substr(1)).eval(context).value; + else if (name.charAt(0) === '@') { + if (name.charAt(1) === '@') { + name = `@${new Variable(name.substr(1)).eval(context).value}`; + } + if (rules.variables) { + rules = rules.variable(name); + } + + if (!rules) { + throw { type: 'Name', + message: `variable ${name} not found`, + filename: this.fileInfo().filename, + index: this.getIndex() }; + } } else { - name = name.charAt(0) === '$' ? name : '$' + name; + if (name.substring(0, 2) === '$@') { + name = `$${new Variable(name.substr(1)).eval(context).value}`; + } + else { + name = name.charAt(0) === '$' ? name : `$${name}`; + } + if (rules.properties) { + rules = rules.property(name); + } + + if (!rules) { + throw { type: 'Name', + message: `property "${name.substr(1)}" not found`, + filename: this.fileInfo().filename, + index: this.getIndex() }; + } + // Properties are an array of values, since a ruleset can have multiple props. + // We pick the last one (the "cascaded" value) + rules = rules[rules.length - 1]; } - if (rules.properties) { - rules = rules.property(name); + + if (rules.value) { + rules = rules.eval(context).value; } - - if (!rules) { - throw { type: 'Name', - message: 'property "' + name.substr(1) + '" not found', - filename: this.fileInfo().filename, - index: this.getIndex() }; + if (rules.ruleset) { + rules = rules.ruleset.eval(context); } - // Properties are an array of values, since a ruleset can have multiple props. - // We pick the last one (the "cascaded" value) - rules = rules[rules.length - 1]; - } - - if (rules.value) { - rules = rules.eval(context).value; - } - if (rules.ruleset) { - rules = rules.ruleset.eval(context); } + return rules; } - return rules; -}; -module.exports = NamespaceValue; +} + +NamespaceValue.prototype.type = 'NamespaceValue'; +export default NamespaceValue; diff --git a/lib/less/tree/negative.js b/lib/less/tree/negative.js index 5052dddb1..ae0f199b4 100644 --- a/lib/less/tree/negative.js +++ b/lib/less/tree/negative.js @@ -1,20 +1,24 @@ -var Node = require('./node'), - Operation = require('./operation'), - Dimension = require('./dimension'); +import Node from './node'; +import Operation from './operation'; +import Dimension from './dimension'; -var Negative = function (node) { - this.value = node; -}; -Negative.prototype = new Node(); -Negative.prototype.type = 'Negative'; -Negative.prototype.genCSS = function (context, output) { - output.add('-'); - this.value.genCSS(context, output); -}; -Negative.prototype.eval = function (context) { - if (context.isMathOn()) { - return (new Operation('*', [new Dimension(-1), this.value])).eval(context); +class Negative extends Node { + constructor(node) { + this.value = node; + } + + genCSS(context, output) { + output.add('-'); + this.value.genCSS(context, output); } - return new Negative(this.value.eval(context)); -}; -module.exports = Negative; + + eval(context) { + if (context.isMathOn()) { + return (new Operation('*', [new Dimension(-1), this.value])).eval(context); + } + return new Negative(this.value.eval(context)); + } +} + +Negative.prototype.type = 'Negative'; +export default Negative; diff --git a/lib/less/tree/node.js b/lib/less/tree/node.js index fe9e5231a..90aa51a93 100644 --- a/lib/less/tree/node.js +++ b/lib/less/tree/node.js @@ -1,72 +1,144 @@ -var Node = function() { - this.parent = null; - this.visibilityBlocks = undefined; - this.nodeVisible = undefined; - this.rootNode = null; - this.parsed = null; - - var self = this; - Object.defineProperty(this, 'currentFileInfo', { - get: function() { return self.fileInfo(); } - }); - Object.defineProperty(this, 'index', { - get: function() { return self.getIndex(); } - }); +class Node { + constructor() { + this.parent = null; + this.visibilityBlocks = undefined; + this.nodeVisible = undefined; + this.rootNode = null; + this.parsed = null; -}; -Node.prototype.setParent = function(nodes, parent) { - function set(node) { - if (node && node instanceof Node) { - node.parent = parent; + const self = this; + Object.defineProperty(this, 'currentFileInfo', { + get: function() { return self.fileInfo(); } + }); + Object.defineProperty(this, 'index', { + get: function() { return self.getIndex(); } + }); + + } + + setParent(nodes, parent) { + function set(node) { + if (node && node instanceof Node) { + node.parent = parent; + } } + if (Array.isArray(nodes)) { + nodes.forEach(set); + } + else { + set(nodes); + } + } + + getIndex() { + return this._index || (this.parent && this.parent.getIndex()) || 0; } - if (Array.isArray(nodes)) { - nodes.forEach(set); + + fileInfo() { + return this._fileInfo || (this.parent && this.parent.fileInfo()) || {}; } - else { - set(nodes); + + isRulesetLike() { + return false; } -}; -Node.prototype.getIndex = function() { - return this._index || (this.parent && this.parent.getIndex()) || 0; -}; -Node.prototype.fileInfo = function() { - return this._fileInfo || (this.parent && this.parent.fileInfo()) || {}; -}; -Node.prototype.isRulesetLike = function() { return false; }; -Node.prototype.toCSS = function (context) { - var strs = []; - this.genCSS(context, { - add: function(chunk, fileInfo, index) { - strs.push(chunk); - }, - isEmpty: function () { - return strs.length === 0; + + toCSS(context) { + const strs = []; + this.genCSS(context, { + add: function(chunk, fileInfo, index) { + strs.push(chunk); + }, + isEmpty: function () { + return strs.length === 0; + } + }); + return strs.join(''); + } + + genCSS(context, output) { + output.add(this.value); + } + + accept(visitor) { + this.value = visitor.visit(this.value); + } + + eval() { return this; } + + _operate(context, op, a, b) { + switch (op) { + case '+': return a + b; + case '-': return a - b; + case '*': return a * b; + case '/': return a / b; } - }); - return strs.join(''); -}; -Node.prototype.genCSS = function (context, output) { - output.add(this.value); -}; -Node.prototype.accept = function (visitor) { - this.value = visitor.visit(this.value); -}; -Node.prototype.eval = function () { return this; }; -Node.prototype._operate = function (context, op, a, b) { - switch (op) { - case '+': return a + b; - case '-': return a - b; - case '*': return a * b; - case '/': return a / b; } -}; -Node.prototype.fround = function(context, value) { - var precision = context && context.numPrecision; - // add "epsilon" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded: - return (precision) ? Number((value + 2e-16).toFixed(precision)) : value; -}; -Node.compare = function (a, b) { + + fround(context, value) { + const precision = context && context.numPrecision; + // add "epsilon" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded: + return (precision) ? Number((value + 2e-16).toFixed(precision)) : value; + } + + // Returns true if this node represents root of ast imported by reference + blocksVisibility() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + return this.visibilityBlocks !== 0; + } + + addVisibilityBlock() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + this.visibilityBlocks = this.visibilityBlocks + 1; + } + + removeVisibilityBlock() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + this.visibilityBlocks = this.visibilityBlocks - 1; + } + + // Turns on node visibility - if called node will be shown in output regardless + // of whether it comes from import by reference or not + ensureVisibility() { + this.nodeVisible = true; + } + + // Turns off node visibility - if called node will NOT be shown in output regardless + // of whether it comes from import by reference or not + ensureInvisibility() { + this.nodeVisible = false; + } + + // return values: + // false - the node must not be visible + // true - the node must be visible + // undefined or null - the node has the same visibility as its parent + isVisible() { + return this.nodeVisible; + } + + visibilityInfo() { + return { + visibilityBlocks: this.visibilityBlocks, + nodeVisible: this.nodeVisible + }; + } + + copyVisibilityInfo(info) { + if (!info) { + return; + } + this.visibilityBlocks = info.visibilityBlocks; + this.nodeVisible = info.nodeVisible; + } +} + +Node.compare = (a, b) => { /* returns: -1: a < b 0: a = b @@ -92,7 +164,7 @@ Node.compare = function (a, b) { if (a.length !== b.length) { return undefined; } - for (var i = 0; i < a.length; i++) { + for (let i = 0; i < a.length; i++) { if (Node.compare(a[i], b[i]) !== 0) { return undefined; } @@ -100,58 +172,7 @@ Node.compare = function (a, b) { return 0; }; -Node.numericCompare = function (a, b) { - return a < b ? -1 - : a === b ? 0 - : a > b ? 1 : undefined; -}; -// Returns true if this node represents root of ast imported by reference -Node.prototype.blocksVisibility = function () { - if (this.visibilityBlocks == null) { - this.visibilityBlocks = 0; - } - return this.visibilityBlocks !== 0; -}; -Node.prototype.addVisibilityBlock = function () { - if (this.visibilityBlocks == null) { - this.visibilityBlocks = 0; - } - this.visibilityBlocks = this.visibilityBlocks + 1; -}; -Node.prototype.removeVisibilityBlock = function () { - if (this.visibilityBlocks == null) { - this.visibilityBlocks = 0; - } - this.visibilityBlocks = this.visibilityBlocks - 1; -}; -// Turns on node visibility - if called node will be shown in output regardless -// of whether it comes from import by reference or not -Node.prototype.ensureVisibility = function () { - this.nodeVisible = true; -}; -// Turns off node visibility - if called node will NOT be shown in output regardless -// of whether it comes from import by reference or not -Node.prototype.ensureInvisibility = function () { - this.nodeVisible = false; -}; -// return values: -// false - the node must not be visible -// true - the node must be visible -// undefined or null - the node has the same visibility as its parent -Node.prototype.isVisible = function () { - return this.nodeVisible; -}; -Node.prototype.visibilityInfo = function() { - return { - visibilityBlocks: this.visibilityBlocks, - nodeVisible: this.nodeVisible - }; -}; -Node.prototype.copyVisibilityInfo = function(info) { - if (!info) { - return; - } - this.visibilityBlocks = info.visibilityBlocks; - this.nodeVisible = info.nodeVisible; -}; -module.exports = Node; +Node.numericCompare = (a, b) => a < b ? -1 + : a === b ? 0 + : a > b ? 1 : undefined; +export default Node; diff --git a/lib/less/tree/operation.js b/lib/less/tree/operation.js index c292ec231..5e7d4469a 100644 --- a/lib/less/tree/operation.js +++ b/lib/less/tree/operation.js @@ -1,54 +1,58 @@ -var Node = require('./node'), - Color = require('./color'), - Dimension = require('./dimension'), - MATH = require('../constants').Math; +import Node from './node'; +import Color from './color'; +import Dimension from './dimension'; +import {Math as MATH} from '../constants'; -var Operation = function (op, operands, isSpaced) { - this.op = op.trim(); - this.operands = operands; - this.isSpaced = isSpaced; -}; -Operation.prototype = new Node(); -Operation.prototype.type = 'Operation'; -Operation.prototype.accept = function (visitor) { - this.operands = visitor.visitArray(this.operands); -}; -Operation.prototype.eval = function (context) { - var a = this.operands[0].eval(context), - b = this.operands[1].eval(context), - op; +class Operation extends Node { + constructor(op, operands, isSpaced) { + this.op = op.trim(); + this.operands = operands; + this.isSpaced = isSpaced; + } - if (context.isMathOn(this.op)) { - op = this.op === './' ? '/' : this.op; - if (a instanceof Dimension && b instanceof Color) { - a = a.toColor(); - } - if (b instanceof Dimension && a instanceof Color) { - b = b.toColor(); - } - if (!a.operate) { - if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) { - return new Operation(this.op, [a, b], this.isSpaced); + accept(visitor) { + this.operands = visitor.visitArray(this.operands); + } + + eval(context) { + let a = this.operands[0].eval(context); + let b = this.operands[1].eval(context); + let op; + + if (context.isMathOn(this.op)) { + op = this.op === './' ? '/' : this.op; + if (a instanceof Dimension && b instanceof Color) { + a = a.toColor(); + } + if (b instanceof Dimension && a instanceof Color) { + b = b.toColor(); + } + if (!a.operate) { + if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) { + return new Operation(this.op, [a, b], this.isSpaced); + } + throw { type: 'Operation', + message: 'Operation on an invalid type' }; } - throw { type: 'Operation', - message: 'Operation on an invalid type' }; - } - return a.operate(context, op, b); - } else { - return new Operation(this.op, [a, b], this.isSpaced); - } -}; -Operation.prototype.genCSS = function (context, output) { - this.operands[0].genCSS(context, output); - if (this.isSpaced) { - output.add(' '); + return a.operate(context, op, b); + } else { + return new Operation(this.op, [a, b], this.isSpaced); + } } - output.add(this.op); - if (this.isSpaced) { - output.add(' '); + + genCSS(context, output) { + this.operands[0].genCSS(context, output); + if (this.isSpaced) { + output.add(' '); + } + output.add(this.op); + if (this.isSpaced) { + output.add(' '); + } + this.operands[1].genCSS(context, output); } - this.operands[1].genCSS(context, output); -}; +} -module.exports = Operation; +Operation.prototype.type = 'Operation'; +export default Operation; diff --git a/lib/less/tree/paren.js b/lib/less/tree/paren.js index d77956f16..915565af2 100644 --- a/lib/less/tree/paren.js +++ b/lib/less/tree/paren.js @@ -1,16 +1,20 @@ -var Node = require('./node'); +import Node from './node'; + +class Paren extends Node { + constructor(node) { + this.value = node; + } + + genCSS(context, output) { + output.add('('); + this.value.genCSS(context, output); + output.add(')'); + } + + eval(context) { + return new Paren(this.value.eval(context)); + } +} -var Paren = function (node) { - this.value = node; -}; -Paren.prototype = new Node(); Paren.prototype.type = 'Paren'; -Paren.prototype.genCSS = function (context, output) { - output.add('('); - this.value.genCSS(context, output); - output.add(')'); -}; -Paren.prototype.eval = function (context) { - return new Paren(this.value.eval(context)); -}; -module.exports = Paren; +export default Paren; diff --git a/lib/less/tree/property.js b/lib/less/tree/property.js index 34572197b..9641355bc 100644 --- a/lib/less/tree/property.js +++ b/lib/less/tree/property.js @@ -1,70 +1,75 @@ -var Node = require('./node'), - Declaration = require('./declaration'); +import Node from './node'; +import Declaration from './declaration'; -var Property = function (name, index, currentFileInfo) { - this.name = name; - this._index = index; - this._fileInfo = currentFileInfo; -}; -Property.prototype = new Node(); -Property.prototype.type = 'Property'; -Property.prototype.eval = function (context) { - var property, name = this.name; - // TODO: shorten this reference - var mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules; - - if (this.evaluating) { - throw { type: 'Name', - message: 'Recursive property reference for ' + name, - filename: this.fileInfo().filename, - index: this.getIndex() }; +class Property extends Node { + constructor(name, index, currentFileInfo) { + this.name = name; + this._index = index; + this._fileInfo = currentFileInfo; } - this.evaluating = true; + eval(context) { + let property; + const name = this.name; + // TODO: shorten this reference + const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules; - property = this.find(context.frames, function (frame) { + if (this.evaluating) { + throw { type: 'Name', + message: `Recursive property reference for ${name}`, + filename: this.fileInfo().filename, + index: this.getIndex() }; + } - var v, vArr = frame.property(name); - if (vArr) { - for (var i = 0; i < vArr.length; i++) { - v = vArr[i]; + this.evaluating = true; - vArr[i] = new Declaration(v.name, - v.value, - v.important, - v.merge, - v.index, - v.currentFileInfo, - v.inline, - v.variable - ); - } - mergeRules(vArr); + property = this.find(context.frames, frame => { + let v; + const vArr = frame.property(name); + if (vArr) { + for (let i = 0; i < vArr.length; i++) { + v = vArr[i]; + + vArr[i] = new Declaration(v.name, + v.value, + v.important, + v.merge, + v.index, + v.currentFileInfo, + v.inline, + v.variable + ); + } + mergeRules(vArr); - v = vArr[vArr.length - 1]; - if (v.important) { - var importantScope = context.importantScope[context.importantScope.length - 1]; - importantScope.important = v.important; + v = vArr[vArr.length - 1]; + if (v.important) { + const importantScope = context.importantScope[context.importantScope.length - 1]; + importantScope.important = v.important; + } + v = v.value.eval(context); + return v; } - v = v.value.eval(context); - return v; + }); + if (property) { + this.evaluating = false; + return property; + } else { + throw { type: 'Name', + message: `Property '${name}' is undefined`, + filename: this.currentFileInfo.filename, + index: this.index }; } - }); - if (property) { - this.evaluating = false; - return property; - } else { - throw { type: 'Name', - message: 'Property \'' + name + '\' is undefined', - filename: this.currentFileInfo.filename, - index: this.index }; } -}; -Property.prototype.find = function (obj, fun) { - for (var i = 0, r; i < obj.length; i++) { - r = fun.call(obj, obj[i]); - if (r) { return r; } + + find(obj, fun) { + for (let i = 0, r; i < obj.length; i++) { + r = fun.call(obj, obj[i]); + if (r) { return r; } + } + return null; } - return null; -}; -module.exports = Property; +} + +Property.prototype.type = 'Property'; +export default Property; diff --git a/lib/less/tree/quoted.js b/lib/less/tree/quoted.js index 080552ac7..e28f37640 100644 --- a/lib/less/tree/quoted.js +++ b/lib/less/tree/quoted.js @@ -1,58 +1,65 @@ -var Node = require('./node'), - Variable = require('./variable'), - Property = require('./property'); +import Node from './node'; +import Variable from './variable'; +import Property from './property'; -var Quoted = function (str, content, escaped, index, currentFileInfo) { - this.escaped = (escaped == null) ? true : escaped; - this.value = content || ''; - this.quote = str.charAt(0); - this._index = index; - this._fileInfo = currentFileInfo; - this.variableRegex = /@\{([\w-]+)\}/g; - this.propRegex = /\$\{([\w-]+)\}/g; -}; -Quoted.prototype = new Node(); -Quoted.prototype.type = 'Quoted'; -Quoted.prototype.genCSS = function (context, output) { - if (!this.escaped) { - output.add(this.quote, this.fileInfo(), this.getIndex()); +class Quoted extends Node { + constructor(str, content, escaped, index, currentFileInfo) { + this.escaped = (escaped == null) ? true : escaped; + this.value = content || ''; + this.quote = str.charAt(0); + this._index = index; + this._fileInfo = currentFileInfo; + this.variableRegex = /@\{([\w-]+)\}/g; + this.propRegex = /\$\{([\w-]+)\}/g; + } + + genCSS(context, output) { + if (!this.escaped) { + output.add(this.quote, this.fileInfo(), this.getIndex()); + } + output.add(this.value); + if (!this.escaped) { + output.add(this.quote); + } } - output.add(this.value); - if (!this.escaped) { - output.add(this.quote); + + containsVariables() { + return this.value.match(this.variableRegex); } -}; -Quoted.prototype.containsVariables = function() { - return this.value.match(this.variableRegex); -}; -Quoted.prototype.eval = function (context) { - var that = this, value = this.value; - var variableReplacement = function (_, name) { - var v = new Variable('@' + name, that.getIndex(), that.fileInfo()).eval(context, true); - return (v instanceof Quoted) ? v.value : v.toCSS(); - }; - var propertyReplacement = function (_, name) { - var v = new Property('$' + name, that.getIndex(), that.fileInfo()).eval(context, true); - return (v instanceof Quoted) ? v.value : v.toCSS(); - }; - function iterativeReplace(value, regexp, replacementFnc) { - var evaluatedValue = value; - do { - value = evaluatedValue.toString(); - evaluatedValue = value.replace(regexp, replacementFnc); - } while (value !== evaluatedValue); - return evaluatedValue; + + eval(context) { + const that = this; + let value = this.value; + const variableReplacement = (_, name) => { + const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true); + return (v instanceof Quoted) ? v.value : v.toCSS(); + }; + const propertyReplacement = (_, name) => { + const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true); + return (v instanceof Quoted) ? v.value : v.toCSS(); + }; + function iterativeReplace(value, regexp, replacementFnc) { + let evaluatedValue = value; + do { + value = evaluatedValue.toString(); + evaluatedValue = value.replace(regexp, replacementFnc); + } while (value !== evaluatedValue); + return evaluatedValue; + } + value = iterativeReplace(value, this.variableRegex, variableReplacement); + value = iterativeReplace(value, this.propRegex, propertyReplacement); + return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo()); } - value = iterativeReplace(value, this.variableRegex, variableReplacement); - value = iterativeReplace(value, this.propRegex, propertyReplacement); - return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo()); -}; -Quoted.prototype.compare = function (other) { - // when comparing quoted strings allow the quote to differ - if (other.type === 'Quoted' && !this.escaped && !other.escaped) { - return Node.numericCompare(this.value, other.value); - } else { - return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; + + compare(other) { + // when comparing quoted strings allow the quote to differ + if (other.type === 'Quoted' && !this.escaped && !other.escaped) { + return Node.numericCompare(this.value, other.value); + } else { + return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; + } } -}; -module.exports = Quoted; +} + +Quoted.prototype.type = 'Quoted'; +export default Quoted; diff --git a/lib/less/tree/ruleset.js b/lib/less/tree/ruleset.js index 89622afb6..12ab10c21 100644 --- a/lib/less/tree/ruleset.js +++ b/lib/less/tree/ruleset.js @@ -1,808 +1,865 @@ -var Node = require('./node'), - Declaration = require('./declaration'), - Keyword = require('./keyword'), - Comment = require('./comment'), - Paren = require('./paren'), - Selector = require('./selector'), - Element = require('./element'), - Anonymous = require('./anonymous'), - contexts = require('../contexts'), - globalFunctionRegistry = require('../functions/function-registry'), - defaultFunc = require('../functions/default'), - getDebugInfo = require('./debug-info'), - utils = require('../utils'); - -var Ruleset = function (selectors, rules, strictImports, visibilityInfo) { - this.selectors = selectors; - this.rules = rules; - this._lookups = {}; - this._variables = null; - this._properties = null; - this.strictImports = strictImports; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; - - this.setParent(this.selectors, this); - this.setParent(this.rules, this); - -}; -Ruleset.prototype = new Node(); -Ruleset.prototype.type = 'Ruleset'; -Ruleset.prototype.isRuleset = true; -Ruleset.prototype.isRulesetLike = function() { return true; }; -Ruleset.prototype.accept = function (visitor) { - if (this.paths) { - this.paths = visitor.visitArray(this.paths, true); - } else if (this.selectors) { - this.selectors = visitor.visitArray(this.selectors); - } - if (this.rules && this.rules.length) { - this.rules = visitor.visitArray(this.rules); - } -}; -Ruleset.prototype.eval = function (context) { - var that = this, selectors, selCnt, selector, i, hasVariable, hasOnePassingSelector = false; - - if (this.selectors && (selCnt = this.selectors.length)) { - selectors = new Array(selCnt); - defaultFunc.error({ - type: 'Syntax', - message: 'it is currently only allowed in parametric mixin guards,' - }); +import Node from './node'; +import Declaration from './declaration'; +import Keyword from './keyword'; +import Comment from './comment'; +import Paren from './paren'; +import Selector from './selector'; +import Element from './element'; +import Anonymous from './anonymous'; +import contexts from '../contexts'; +import globalFunctionRegistry from '../functions/function-registry'; +import defaultFunc from '../functions/default'; +import getDebugInfo from './debug-info'; +import utils from '../utils'; + +class Ruleset extends Node { + constructor(selectors, rules, strictImports, visibilityInfo) { + this.selectors = selectors; + this.rules = rules; + this._lookups = {}; + this._variables = null; + this._properties = null; + this.strictImports = strictImports; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + + this.setParent(this.selectors, this); + this.setParent(this.rules, this); + + } + + isRulesetLike() { + return true; + } + + accept(visitor) { + if (this.paths) { + this.paths = visitor.visitArray(this.paths, true); + } else if (this.selectors) { + this.selectors = visitor.visitArray(this.selectors); + } + if (this.rules && this.rules.length) { + this.rules = visitor.visitArray(this.rules); + } + } + + eval(context) { + const that = this; + let selectors; + let selCnt; + let selector; + let i; + let hasVariable; + let hasOnePassingSelector = false; + + if (this.selectors && (selCnt = this.selectors.length)) { + selectors = new Array(selCnt); + defaultFunc.error({ + type: 'Syntax', + message: 'it is currently only allowed in parametric mixin guards,' + }); - for (i = 0; i < selCnt; i++) { - selector = this.selectors[i].eval(context); - for (var j = 0; j < selector.elements.length; j++) { - if (selector.elements[j].isVariable) { - hasVariable = true; - break; + for (i = 0; i < selCnt; i++) { + selector = this.selectors[i].eval(context); + for (var j = 0; j < selector.elements.length; j++) { + if (selector.elements[j].isVariable) { + hasVariable = true; + break; + } + } + selectors[i] = selector; + if (selector.evaldCondition) { + hasOnePassingSelector = true; } } - selectors[i] = selector; - if (selector.evaldCondition) { - hasOnePassingSelector = true; + + if (hasVariable) { + const toParseSelectors = new Array(selCnt); + for (i = 0; i < selCnt; i++) { + selector = selectors[i]; + toParseSelectors[i] = selector.toCSS(context); + } + this.parse.parseNode( + toParseSelectors.join(','), + ["selectors"], + selectors[0].getIndex(), + selectors[0].fileInfo(), + (err, result) => { + if (result) { + selectors = utils.flattenArray(result); + } + }); } - } - if (hasVariable) { - var toParseSelectors = new Array(selCnt); - for (i = 0; i < selCnt; i++) { - selector = selectors[i]; - toParseSelectors[i] = selector.toCSS(context); - } - this.parse.parseNode( - toParseSelectors.join(','), - ["selectors"], - selectors[0].getIndex(), - selectors[0].fileInfo(), - function(err, result) { - if (result) { - selectors = utils.flattenArray(result); - } - }); + defaultFunc.reset(); + } else { + hasOnePassingSelector = true; } - defaultFunc.reset(); - } else { - hasOnePassingSelector = true; - } + let rules = this.rules ? utils.copyArray(this.rules) : null; + const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo()); + let rule; + let subRule; - var rules = this.rules ? utils.copyArray(this.rules) : null, - ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo()), - rule, subRule; + ruleset.originalRuleset = this; + ruleset.root = this.root; + ruleset.firstRoot = this.firstRoot; + ruleset.allowImports = this.allowImports; - ruleset.originalRuleset = this; - ruleset.root = this.root; - ruleset.firstRoot = this.firstRoot; - ruleset.allowImports = this.allowImports; + if (this.debugInfo) { + ruleset.debugInfo = this.debugInfo; + } - if (this.debugInfo) { - ruleset.debugInfo = this.debugInfo; - } + if (!hasOnePassingSelector) { + rules.length = 0; + } - if (!hasOnePassingSelector) { - rules.length = 0; - } + // inherit a function registry from the frames stack when possible; + // otherwise from the global registry + ruleset.functionRegistry = (frames => { + let i = 0; + const n = frames.length; + let found; + for ( ; i !== n ; ++i ) { + found = frames[ i ].functionRegistry; + if ( found ) { return found; } + } + return globalFunctionRegistry; + })(context.frames).inherit(); - // inherit a function registry from the frames stack when possible; - // otherwise from the global registry - ruleset.functionRegistry = (function (frames) { - var i = 0, - n = frames.length, - found; - for ( ; i !== n ; ++i ) { - found = frames[ i ].functionRegistry; - if ( found ) { return found; } - } - return globalFunctionRegistry; - }(context.frames)).inherit(); - - // push the current ruleset to the frames stack - var ctxFrames = context.frames; - ctxFrames.unshift(ruleset); - - // currrent selectors - var ctxSelectors = context.selectors; - if (!ctxSelectors) { - context.selectors = ctxSelectors = []; - } - ctxSelectors.unshift(this.selectors); + // push the current ruleset to the frames stack + const ctxFrames = context.frames; + ctxFrames.unshift(ruleset); - // Evaluate imports - if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) { - ruleset.evalImports(context); - } + // currrent selectors + let ctxSelectors = context.selectors; + if (!ctxSelectors) { + context.selectors = ctxSelectors = []; + } + ctxSelectors.unshift(this.selectors); - // Store the frames around mixin definitions, - // so they can be evaluated like closures when the time comes. - var rsRules = ruleset.rules; - for (i = 0; (rule = rsRules[i]); i++) { - if (rule.evalFirst) { - rsRules[i] = rule.eval(context); + // Evaluate imports + if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) { + ruleset.evalImports(context); } - } - var mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0; - - // Evaluate mixin calls. - for (i = 0; (rule = rsRules[i]); i++) { - if (rule.type === 'MixinCall') { - /* jshint loopfunc:true */ - rules = rule.eval(context).filter(function(r) { - if ((r instanceof Declaration) && r.variable) { - // do not pollute the scope if the variable is - // already there. consider returning false here - // but we need a way to "return" variable from mixins - return !(ruleset.variable(r.name)); - } - return true; - }); - rsRules.splice.apply(rsRules, [i, 1].concat(rules)); - i += rules.length - 1; - ruleset.resetCache(); - } else if (rule.type === 'VariableCall') { - /* jshint loopfunc:true */ - rules = rule.eval(context).rules.filter(function(r) { - if ((r instanceof Declaration) && r.variable) { - // do not pollute the scope at all - return false; - } - return true; - }); - rsRules.splice.apply(rsRules, [i, 1].concat(rules)); - i += rules.length - 1; - ruleset.resetCache(); + // Store the frames around mixin definitions, + // so they can be evaluated like closures when the time comes. + const rsRules = ruleset.rules; + for (i = 0; (rule = rsRules[i]); i++) { + if (rule.evalFirst) { + rsRules[i] = rule.eval(context); + } } - } - // Evaluate everything else - for (i = 0; (rule = rsRules[i]); i++) { - if (!rule.evalFirst) { - rsRules[i] = rule = rule.eval ? rule.eval(context) : rule; + const mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0; + + // Evaluate mixin calls. + for (i = 0; (rule = rsRules[i]); i++) { + if (rule.type === 'MixinCall') { + /* jshint loopfunc:true */ + rules = rule.eval(context).filter(r => { + if ((r instanceof Declaration) && r.variable) { + // do not pollute the scope if the variable is + // already there. consider returning false here + // but we need a way to "return" variable from mixins + return !(ruleset.variable(r.name)); + } + return true; + }); + rsRules.splice(...[i, 1].concat(rules)); + i += rules.length - 1; + ruleset.resetCache(); + } else if (rule.type === 'VariableCall') { + /* jshint loopfunc:true */ + rules = rule.eval(context).rules.filter(r => { + if ((r instanceof Declaration) && r.variable) { + // do not pollute the scope at all + return false; + } + return true; + }); + rsRules.splice(...[i, 1].concat(rules)); + i += rules.length - 1; + ruleset.resetCache(); + } } - } - // Evaluate everything else - for (i = 0; (rule = rsRules[i]); i++) { - // for rulesets, check if it is a css guard and can be removed - if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) { - // check if it can be folded in (e.g. & where) - if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) { - rsRules.splice(i--, 1); - - for (var j = 0; (subRule = rule.rules[j]); j++) { - if (subRule instanceof Node) { - subRule.copyVisibilityInfo(rule.visibilityInfo()); - if (!(subRule instanceof Declaration) || !subRule.variable) { - rsRules.splice(++i, 0, subRule); + // Evaluate everything else + for (i = 0; (rule = rsRules[i]); i++) { + if (!rule.evalFirst) { + rsRules[i] = rule = rule.eval ? rule.eval(context) : rule; + } + } + + // Evaluate everything else + for (i = 0; (rule = rsRules[i]); i++) { + // for rulesets, check if it is a css guard and can be removed + if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) { + // check if it can be folded in (e.g. & where) + if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) { + rsRules.splice(i--, 1); + + for (var j = 0; (subRule = rule.rules[j]); j++) { + if (subRule instanceof Node) { + subRule.copyVisibilityInfo(rule.visibilityInfo()); + if (!(subRule instanceof Declaration) || !subRule.variable) { + rsRules.splice(++i, 0, subRule); + } } } } } } + + // Pop the stack + ctxFrames.shift(); + ctxSelectors.shift(); + + if (context.mediaBlocks) { + for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) { + context.mediaBlocks[i].bubbleSelectors(selectors); + } + } + + return ruleset; } - // Pop the stack - ctxFrames.shift(); - ctxSelectors.shift(); + evalImports(context) { + const rules = this.rules; + let i; + let importRules; + if (!rules) { return; } - if (context.mediaBlocks) { - for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) { - context.mediaBlocks[i].bubbleSelectors(selectors); + for (i = 0; i < rules.length; i++) { + if (rules[i].type === 'Import') { + importRules = rules[i].eval(context); + if (importRules && (importRules.length || importRules.length === 0)) { + rules.splice(...[i, 1].concat(importRules)); + i += importRules.length - 1; + } else { + rules.splice(i, 1, importRules); + } + this.resetCache(); + } } } - return ruleset; -}; -Ruleset.prototype.evalImports = function(context) { - var rules = this.rules, i, importRules; - if (!rules) { return; } - - for (i = 0; i < rules.length; i++) { - if (rules[i].type === 'Import') { - importRules = rules[i].eval(context); - if (importRules && (importRules.length || importRules.length === 0)) { - rules.splice.apply(rules, [i, 1].concat(importRules)); - i += importRules.length - 1; + makeImportant() { + const result = new Ruleset(this.selectors, this.rules.map(r => { + if (r.makeImportant) { + return r.makeImportant(); } else { - rules.splice(i, 1, importRules); + return r; } - this.resetCache(); - } + }), this.strictImports, this.visibilityInfo()); + + return result; } -}; -Ruleset.prototype.makeImportant = function() { - var result = new Ruleset(this.selectors, this.rules.map(function (r) { - if (r.makeImportant) { - return r.makeImportant(); - } else { - return r; - } - }), this.strictImports, this.visibilityInfo()); - - return result; -}; -Ruleset.prototype.matchArgs = function (args) { - return !args || args.length === 0; -}; -// lets you call a css selector with a guard -Ruleset.prototype.matchCondition = function (args, context) { - var lastSelector = this.selectors[this.selectors.length - 1]; - if (!lastSelector.evaldCondition) { - return false; + + matchArgs(args) { + return !args || args.length === 0; } - if (lastSelector.condition && - !lastSelector.condition.eval( - new contexts.Eval(context, - context.frames))) { - return false; + + // lets you call a css selector with a guard + matchCondition(args, context) { + const lastSelector = this.selectors[this.selectors.length - 1]; + if (!lastSelector.evaldCondition) { + return false; + } + if (lastSelector.condition && + !lastSelector.condition.eval( + new contexts.Eval(context, + context.frames))) { + return false; + } + return true; } - return true; -}; -Ruleset.prototype.resetCache = function () { - this._rulesets = null; - this._variables = null; - this._properties = null; - this._lookups = {}; -}; -Ruleset.prototype.variables = function () { - if (!this._variables) { - this._variables = !this.rules ? {} : this.rules.reduce(function (hash, r) { - if (r instanceof Declaration && r.variable === true) { - hash[r.name] = r; - } - // when evaluating variables in an import statement, imports have not been eval'd - // so we need to go inside import statements. - // guard against root being a string (in the case of inlined less) - if (r.type === 'Import' && r.root && r.root.variables) { - var vars = r.root.variables(); - for (var name in vars) { - if (vars.hasOwnProperty(name)) { - hash[name] = r.root.variable(name); - } - } - } - return hash; - }, {}); + + resetCache() { + this._rulesets = null; + this._variables = null; + this._properties = null; + this._lookups = {}; } - return this._variables; -}; -Ruleset.prototype.properties = function () { - if (!this._properties) { - this._properties = !this.rules ? {} : this.rules.reduce(function (hash, r) { - if (r instanceof Declaration && r.variable !== true) { - var name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ? - r.name[0].value : r.name; - // Properties don't overwrite as they can merge - if (!hash['$' + name]) { - hash['$' + name] = [ r ]; + + variables() { + if (!this._variables) { + this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => { + if (r instanceof Declaration && r.variable === true) { + hash[r.name] = r; } - else { - hash['$' + name].push(r); + // when evaluating variables in an import statement, imports have not been eval'd + // so we need to go inside import statements. + // guard against root being a string (in the case of inlined less) + if (r.type === 'Import' && r.root && r.root.variables) { + const vars = r.root.variables(); + for (const name in vars) { + if (vars.hasOwnProperty(name)) { + hash[name] = r.root.variable(name); + } + } } - } - return hash; - }, {}); + return hash; + }, {}); + } + return this._variables; } - return this._properties; -}; -Ruleset.prototype.variable = function (name) { - var decl = this.variables()[name]; - if (decl) { - return this.parseValue(decl); + + properties() { + if (!this._properties) { + this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => { + if (r instanceof Declaration && r.variable !== true) { + const name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ? + r.name[0].value : r.name; + // Properties don't overwrite as they can merge + if (!hash[`$${name}`]) { + hash[`$${name}`] = [ r ]; + } + else { + hash[`$${name}`].push(r); + } + } + return hash; + }, {}); + } + return this._properties; } -}; -Ruleset.prototype.property = function (name) { - var decl = this.properties()[name]; - if (decl) { - return this.parseValue(decl); + + variable(name) { + const decl = this.variables()[name]; + if (decl) { + return this.parseValue(decl); + } } -}; -Ruleset.prototype.lastDeclaration = function () { - for (var i = this.rules.length; i > 0; i--) { - var decl = this.rules[i - 1]; - if (decl instanceof Declaration) { + + property(name) { + const decl = this.properties()[name]; + if (decl) { return this.parseValue(decl); } } -}; -Ruleset.prototype.parseValue = function(toParse) { - var self = this; - function transformDeclaration(decl) { - if (decl.value instanceof Anonymous && !decl.parsed) { - if (typeof decl.value.value === 'string') { - this.parse.parseNode( - decl.value.value, - ['value', 'important'], - decl.value.getIndex(), - decl.fileInfo(), - function(err, result) { - if (err) { - decl.parsed = true; - } - if (result) { - decl.value = result[0]; - decl.important = result[1] || ''; - decl.parsed = true; - } - }); - } else { - decl.parsed = true; + + lastDeclaration() { + for (let i = this.rules.length; i > 0; i--) { + const decl = this.rules[i - 1]; + if (decl instanceof Declaration) { + return this.parseValue(decl); } + } + } + + parseValue(toParse) { + const self = this; + function transformDeclaration(decl) { + if (decl.value instanceof Anonymous && !decl.parsed) { + if (typeof decl.value.value === 'string') { + this.parse.parseNode( + decl.value.value, + ['value', 'important'], + decl.value.getIndex(), + decl.fileInfo(), + (err, result) => { + if (err) { + decl.parsed = true; + } + if (result) { + decl.value = result[0]; + decl.important = result[1] || ''; + decl.parsed = true; + } + }); + } else { + decl.parsed = true; + } - return decl; + return decl; + } + else { + return decl; + } + } + if (!Array.isArray(toParse)) { + return transformDeclaration.call(self, toParse); } else { - return decl; + const nodes = []; + toParse.forEach(n => { + nodes.push(transformDeclaration.call(self, n)); + }); + return nodes; } } - if (!Array.isArray(toParse)) { - return transformDeclaration.call(self, toParse); - } - else { - var nodes = []; - toParse.forEach(function(n) { - nodes.push(transformDeclaration.call(self, n)); - }); - return nodes; - } -}; -Ruleset.prototype.rulesets = function () { - if (!this.rules) { return []; } - var filtRules = [], rules = this.rules, - i, rule; + rulesets() { + if (!this.rules) { return []; } + + const filtRules = []; + const rules = this.rules; + let i; + let rule; - for (i = 0; (rule = rules[i]); i++) { - if (rule.isRuleset) { - filtRules.push(rule); + for (i = 0; (rule = rules[i]); i++) { + if (rule.isRuleset) { + filtRules.push(rule); + } } - } - return filtRules; -}; -Ruleset.prototype.prependRule = function (rule) { - var rules = this.rules; - if (rules) { - rules.unshift(rule); - } else { - this.rules = [ rule ]; + return filtRules; } - this.setParent(rule, this); -}; -Ruleset.prototype.find = function (selector, self, filter) { - self = self || this; - var rules = [], match, foundMixins, - key = selector.toCSS(); - - if (key in this._lookups) { return this._lookups[key]; } - - this.rulesets().forEach(function (rule) { - if (rule !== self) { - for (var j = 0; j < rule.selectors.length; j++) { - match = selector.match(rule.selectors[j]); - if (match) { - if (selector.elements.length > match) { - if (!filter || filter(rule)) { - foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter); - for (var i = 0; i < foundMixins.length; ++i) { - foundMixins[i].path.push(rule); + + prependRule(rule) { + const rules = this.rules; + if (rules) { + rules.unshift(rule); + } else { + this.rules = [ rule ]; + } + this.setParent(rule, this); + } + + find(selector, self = this, filter) { + const rules = []; + let match; + let foundMixins; + const key = selector.toCSS(); + + if (key in this._lookups) { return this._lookups[key]; } + + this.rulesets().forEach(rule => { + if (rule !== self) { + for (let j = 0; j < rule.selectors.length; j++) { + match = selector.match(rule.selectors[j]); + if (match) { + if (selector.elements.length > match) { + if (!filter || filter(rule)) { + foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter); + for (let i = 0; i < foundMixins.length; ++i) { + foundMixins[i].path.push(rule); + } + Array.prototype.push.apply(rules, foundMixins); } - Array.prototype.push.apply(rules, foundMixins); + } else { + rules.push({ rule, path: []}); } - } else { - rules.push({ rule: rule, path: []}); + break; } - break; } } - } - }); - this._lookups[key] = rules; - return rules; -}; -Ruleset.prototype.genCSS = function (context, output) { - var i, j, - charsetRuleNodes = [], - ruleNodes = [], - debugInfo, // Line number debugging - rule, - path; + }); + this._lookups[key] = rules; + return rules; + } - context.tabLevel = (context.tabLevel || 0); + genCSS(context, output) { + let i; + let j; + const charsetRuleNodes = []; + let ruleNodes = []; - if (!this.root) { - context.tabLevel++; - } + let // Line number debugging + debugInfo; - var tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' '), - tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' '), - sep; + let rule; + let path; - var charsetNodeIndex = 0; - var importNodeIndex = 0; - for (i = 0; (rule = this.rules[i]); i++) { - if (rule instanceof Comment) { - if (importNodeIndex === i) { + context.tabLevel = (context.tabLevel || 0); + + if (!this.root) { + context.tabLevel++; + } + + const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' '); + const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' '); + let sep; + + let charsetNodeIndex = 0; + let importNodeIndex = 0; + for (i = 0; (rule = this.rules[i]); i++) { + if (rule instanceof Comment) { + if (importNodeIndex === i) { + importNodeIndex++; + } + ruleNodes.push(rule); + } else if (rule.isCharset && rule.isCharset()) { + ruleNodes.splice(charsetNodeIndex, 0, rule); + charsetNodeIndex++; importNodeIndex++; + } else if (rule.type === 'Import') { + ruleNodes.splice(importNodeIndex, 0, rule); + importNodeIndex++; + } else { + ruleNodes.push(rule); } - ruleNodes.push(rule); - } else if (rule.isCharset && rule.isCharset()) { - ruleNodes.splice(charsetNodeIndex, 0, rule); - charsetNodeIndex++; - importNodeIndex++; - } else if (rule.type === 'Import') { - ruleNodes.splice(importNodeIndex, 0, rule); - importNodeIndex++; - } else { - ruleNodes.push(rule); } - } - ruleNodes = charsetRuleNodes.concat(ruleNodes); + ruleNodes = charsetRuleNodes.concat(ruleNodes); - // If this is the root node, we don't render - // a selector, or {}. - if (!this.root) { - debugInfo = getDebugInfo(context, this, tabSetStr); + // If this is the root node, we don't render + // a selector, or {}. + if (!this.root) { + debugInfo = getDebugInfo(context, this, tabSetStr); - if (debugInfo) { - output.add(debugInfo); - output.add(tabSetStr); - } + if (debugInfo) { + output.add(debugInfo); + output.add(tabSetStr); + } - var paths = this.paths, pathCnt = paths.length, - pathSubCnt; + const paths = this.paths; + const pathCnt = paths.length; + let pathSubCnt; - sep = context.compress ? ',' : (',\n' + tabSetStr); + sep = context.compress ? ',' : (`,\n${tabSetStr}`); - for (i = 0; i < pathCnt; i++) { - path = paths[i]; - if (!(pathSubCnt = path.length)) { continue; } - if (i > 0) { output.add(sep); } + for (i = 0; i < pathCnt; i++) { + path = paths[i]; + if (!(pathSubCnt = path.length)) { continue; } + if (i > 0) { output.add(sep); } - context.firstSelector = true; - path[0].genCSS(context, output); + context.firstSelector = true; + path[0].genCSS(context, output); - context.firstSelector = false; - for (j = 1; j < pathSubCnt; j++) { - path[j].genCSS(context, output); + context.firstSelector = false; + for (j = 1; j < pathSubCnt; j++) { + path[j].genCSS(context, output); + } } - } - output.add((context.compress ? '{' : ' {\n') + tabRuleStr); - } + output.add((context.compress ? '{' : ' {\n') + tabRuleStr); + } - // Compile rules and rulesets - for (i = 0; (rule = ruleNodes[i]); i++) { + // Compile rules and rulesets + for (i = 0; (rule = ruleNodes[i]); i++) { - if (i + 1 === ruleNodes.length) { - context.lastRule = true; - } + if (i + 1 === ruleNodes.length) { + context.lastRule = true; + } - var currentLastRule = context.lastRule; - if (rule.isRulesetLike(rule)) { - context.lastRule = false; - } + const currentLastRule = context.lastRule; + if (rule.isRulesetLike(rule)) { + context.lastRule = false; + } - if (rule.genCSS) { - rule.genCSS(context, output); - } else if (rule.value) { - output.add(rule.value.toString()); - } + if (rule.genCSS) { + rule.genCSS(context, output); + } else if (rule.value) { + output.add(rule.value.toString()); + } - context.lastRule = currentLastRule; + context.lastRule = currentLastRule; - if (!context.lastRule && rule.isVisible()) { - output.add(context.compress ? '' : ('\n' + tabRuleStr)); - } else { - context.lastRule = false; + if (!context.lastRule && rule.isVisible()) { + output.add(context.compress ? '' : (`\n${tabRuleStr}`)); + } else { + context.lastRule = false; + } } - } - if (!this.root) { - output.add((context.compress ? '}' : '\n' + tabSetStr + '}')); - context.tabLevel--; - } + if (!this.root) { + output.add((context.compress ? '}' : `\n${tabSetStr}}`)); + context.tabLevel--; + } - if (!output.isEmpty() && !context.compress && this.firstRoot) { - output.add('\n'); + if (!output.isEmpty() && !context.compress && this.firstRoot) { + output.add('\n'); + } } -}; -Ruleset.prototype.joinSelectors = function (paths, context, selectors) { - for (var s = 0; s < selectors.length; s++) { - this.joinSelector(paths, context, selectors[s]); + joinSelectors(paths, context, selectors) { + for (let s = 0; s < selectors.length; s++) { + this.joinSelector(paths, context, selectors[s]); + } } -}; -Ruleset.prototype.joinSelector = function (paths, context, selector) { + joinSelector(paths, context, selector) { + function createParenthesis(elementsToPak, originalElement) { + let replacementParen; + let j; + if (elementsToPak.length === 0) { + replacementParen = new Paren(elementsToPak[0]); + } else { + const insideParent = new Array(elementsToPak.length); + for (j = 0; j < elementsToPak.length; j++) { + insideParent[j] = new Element( + null, + elementsToPak[j], + originalElement.isVariable, + originalElement._index, + originalElement._fileInfo + ); + } + replacementParen = new Paren(new Selector(insideParent)); + } + return replacementParen; + } + + function createSelector(containedElement, originalElement) { + let element; + let selector; + element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo); + selector = new Selector([element]); + return selector; + } + + // joins selector path from `beginningPath` with selector path in `addPath` + // `replacedElement` contains element that is being replaced by `addPath` + // returns concatenated path + function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) { + let newSelectorPath; + let lastSelector; + let newJoinedSelector; + // our new selector path + newSelectorPath = []; + + // construct the joined selector - if & is the first thing this will be empty, + // if not newJoinedSelector will be the last set of elements in the selector + if (beginningPath.length > 0) { + newSelectorPath = utils.copyArray(beginningPath); + lastSelector = newSelectorPath.pop(); + newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements)); + } + else { + newJoinedSelector = originalSelector.createDerived([]); + } - function createParenthesis(elementsToPak, originalElement) { - var replacementParen, j; - if (elementsToPak.length === 0) { - replacementParen = new Paren(elementsToPak[0]); - } else { - var insideParent = new Array(elementsToPak.length); - for (j = 0; j < elementsToPak.length; j++) { - insideParent[j] = new Element( - null, - elementsToPak[j], - originalElement.isVariable, - originalElement._index, - originalElement._fileInfo - ); - } - replacementParen = new Paren(new Selector(insideParent)); - } - return replacementParen; - } + if (addPath.length > 0) { + // /deep/ is a CSS4 selector - (removed, so should deprecate) + // that is valid without anything in front of it + // so if the & does not have a combinator that is "" or " " then + // and there is a combinator on the parent, then grab that. + // this also allows + a { & .b { .a & { ... though not sure why you would want to do that + let combinator = replacedElement.combinator; + + const parentEl = addPath[0].elements[0]; + if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) { + combinator = parentEl.combinator; + } + // join the elements so far with the first part of the parent + newJoinedSelector.elements.push(new Element( + combinator, + parentEl.value, + replacedElement.isVariable, + replacedElement._index, + replacedElement._fileInfo + )); + newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1)); + } - function createSelector(containedElement, originalElement) { - var element, selector; - element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo); - selector = new Selector([element]); - return selector; - } + // now add the joined selector - but only if it is not empty + if (newJoinedSelector.elements.length !== 0) { + newSelectorPath.push(newJoinedSelector); + } - // joins selector path from `beginningPath` with selector path in `addPath` - // `replacedElement` contains element that is being replaced by `addPath` - // returns concatenated path - function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) { - var newSelectorPath, lastSelector, newJoinedSelector; - // our new selector path - newSelectorPath = []; - - // construct the joined selector - if & is the first thing this will be empty, - // if not newJoinedSelector will be the last set of elements in the selector - if (beginningPath.length > 0) { - newSelectorPath = utils.copyArray(beginningPath); - lastSelector = newSelectorPath.pop(); - newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements)); - } - else { - newJoinedSelector = originalSelector.createDerived([]); - } - - if (addPath.length > 0) { - // /deep/ is a CSS4 selector - (removed, so should deprecate) - // that is valid without anything in front of it - // so if the & does not have a combinator that is "" or " " then - // and there is a combinator on the parent, then grab that. - // this also allows + a { & .b { .a & { ... though not sure why you would want to do that - var combinator = replacedElement.combinator, parentEl = addPath[0].elements[0]; - if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) { - combinator = parentEl.combinator; - } - // join the elements so far with the first part of the parent - newJoinedSelector.elements.push(new Element( - combinator, - parentEl.value, - replacedElement.isVariable, - replacedElement._index, - replacedElement._fileInfo - )); - newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1)); - } - - // now add the joined selector - but only if it is not empty - if (newJoinedSelector.elements.length !== 0) { - newSelectorPath.push(newJoinedSelector); - } - - // put together the parent selectors after the join (e.g. the rest of the parent) - if (addPath.length > 1) { - var restOfPath = addPath.slice(1); - restOfPath = restOfPath.map(function (selector) { - return selector.createDerived(selector.elements, []); - }); - newSelectorPath = newSelectorPath.concat(restOfPath); + // put together the parent selectors after the join (e.g. the rest of the parent) + if (addPath.length > 1) { + let restOfPath = addPath.slice(1); + restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, [])); + newSelectorPath = newSelectorPath.concat(restOfPath); + } + return newSelectorPath; } - return newSelectorPath; - } - // joins selector path from `beginningPath` with every selector path in `addPaths` array - // `replacedElement` contains element that is being replaced by `addPath` - // returns array with all concatenated paths - function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) { - var j; - for (j = 0; j < beginningPath.length; j++) { - var newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector); - result.push(newSelectorPath); + // joins selector path from `beginningPath` with every selector path in `addPaths` array + // `replacedElement` contains element that is being replaced by `addPath` + // returns array with all concatenated paths + function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) { + let j; + for (j = 0; j < beginningPath.length; j++) { + const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector); + result.push(newSelectorPath); + } + return result; } - return result; - } - function mergeElementsOnToSelectors(elements, selectors) { - var i, sel; - - if (elements.length === 0) { - return ; - } - if (selectors.length === 0) { - selectors.push([ new Selector(elements) ]); - return; - } + function mergeElementsOnToSelectors(elements, selectors) { + let i; + let sel; - for (i = 0; (sel = selectors[i]); i++) { - // if the previous thing in sel is a parent this needs to join on to it - if (sel.length > 0) { - sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements)); + if (elements.length === 0) { + return ; } - else { - sel.push(new Selector(elements)); + if (selectors.length === 0) { + selectors.push([ new Selector(elements) ]); + return; + } + + for (i = 0; (sel = selectors[i]); i++) { + // if the previous thing in sel is a parent this needs to join on to it + if (sel.length > 0) { + sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements)); + } + else { + sel.push(new Selector(elements)); + } } } - } - // replace all parent selectors inside `inSelector` by content of `context` array - // resulting selectors are returned inside `paths` array - // returns true if `inSelector` contained at least one parent selector - function replaceParentSelector(paths, context, inSelector) { - // The paths are [[Selector]] - // The first list is a list of comma separated selectors - // The inner list is a list of inheritance separated selectors - // e.g. - // .a, .b { - // .c { - // } - // } - // == [[.a] [.c]] [[.b] [.c]] - // - var i, j, k, currentElements, newSelectors, selectorsMultiplied, sel, el, hadParentSelector = false, length, lastSelector; - function findNestedSelector(element) { - var maybeSelector; - if (!(element.value instanceof Paren)) { - return null; - } - - maybeSelector = element.value.value; - if (!(maybeSelector instanceof Selector)) { - return null; - } - - return maybeSelector; - } - - // the elements from the current selector so far - currentElements = []; - // the current list of new selectors to add to the path. - // We will build it up. We initiate it with one empty selector as we "multiply" the new selectors - // by the parents - newSelectors = [ - [] - ]; - - for (i = 0; (el = inSelector.elements[i]); i++) { - // non parent reference elements just get added - if (el.value !== '&') { - var nestedSelector = findNestedSelector(el); - if (nestedSelector != null) { - // merge the current list of non parent selector elements - // on to the current list of selectors to add - mergeElementsOnToSelectors(currentElements, newSelectors); + // replace all parent selectors inside `inSelector` by content of `context` array + // resulting selectors are returned inside `paths` array + // returns true if `inSelector` contained at least one parent selector + function replaceParentSelector(paths, context, inSelector) { + // The paths are [[Selector]] + // The first list is a list of comma separated selectors + // The inner list is a list of inheritance separated selectors + // e.g. + // .a, .b { + // .c { + // } + // } + // == [[.a] [.c]] [[.b] [.c]] + // + let i; + + let j; + let k; + let currentElements; + let newSelectors; + let selectorsMultiplied; + let sel; + let el; + let hadParentSelector = false; + let length; + let lastSelector; + function findNestedSelector(element) { + let maybeSelector; + if (!(element.value instanceof Paren)) { + return null; + } - var nestedPaths = [], replaced, replacedNewSelectors = []; - replaced = replaceParentSelector(nestedPaths, context, nestedSelector); - hadParentSelector = hadParentSelector || replaced; - // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors - for (k = 0; k < nestedPaths.length; k++) { - var replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el); - addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors); + maybeSelector = element.value.value; + if (!(maybeSelector instanceof Selector)) { + return null; + } + + return maybeSelector; + } + + // the elements from the current selector so far + currentElements = []; + // the current list of new selectors to add to the path. + // We will build it up. We initiate it with one empty selector as we "multiply" the new selectors + // by the parents + newSelectors = [ + [] + ]; + + for (i = 0; (el = inSelector.elements[i]); i++) { + // non parent reference elements just get added + if (el.value !== '&') { + const nestedSelector = findNestedSelector(el); + if (nestedSelector != null) { + // merge the current list of non parent selector elements + // on to the current list of selectors to add + mergeElementsOnToSelectors(currentElements, newSelectors); + + const nestedPaths = []; + let replaced; + const replacedNewSelectors = []; + replaced = replaceParentSelector(nestedPaths, context, nestedSelector); + hadParentSelector = hadParentSelector || replaced; + // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors + for (k = 0; k < nestedPaths.length; k++) { + const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el); + addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors); + } + newSelectors = replacedNewSelectors; + currentElements = []; + } else { + currentElements.push(el); } - newSelectors = replacedNewSelectors; - currentElements = []; } else { - currentElements.push(el); - } + hadParentSelector = true; + // the new list of selectors to add + selectorsMultiplied = []; - } else { - hadParentSelector = true; - // the new list of selectors to add - selectorsMultiplied = []; - - // merge the current list of non parent selector elements - // on to the current list of selectors to add - mergeElementsOnToSelectors(currentElements, newSelectors); - - // loop through our current selectors - for (j = 0; j < newSelectors.length; j++) { - sel = newSelectors[j]; - // if we don't have any parent paths, the & might be in a mixin so that it can be used - // whether there are parents or not - if (context.length === 0) { - // the combinator used on el should now be applied to the next element instead so that - // it is not lost - if (sel.length > 0) { - sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo)); + // merge the current list of non parent selector elements + // on to the current list of selectors to add + mergeElementsOnToSelectors(currentElements, newSelectors); + + // loop through our current selectors + for (j = 0; j < newSelectors.length; j++) { + sel = newSelectors[j]; + // if we don't have any parent paths, the & might be in a mixin so that it can be used + // whether there are parents or not + if (context.length === 0) { + // the combinator used on el should now be applied to the next element instead so that + // it is not lost + if (sel.length > 0) { + sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo)); + } + selectorsMultiplied.push(sel); } - selectorsMultiplied.push(sel); - } - else { - // and the parent selectors - for (k = 0; k < context.length; k++) { - // We need to put the current selectors - // then join the last selector's elements on to the parents selectors - var newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector); - // add that to our new set of selectors - selectorsMultiplied.push(newSelectorPath); + else { + // and the parent selectors + for (k = 0; k < context.length; k++) { + // We need to put the current selectors + // then join the last selector's elements on to the parents selectors + const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector); + // add that to our new set of selectors + selectorsMultiplied.push(newSelectorPath); + } } } - } - // our new selectors has been multiplied, so reset the state - newSelectors = selectorsMultiplied; - currentElements = []; + // our new selectors has been multiplied, so reset the state + newSelectors = selectorsMultiplied; + currentElements = []; + } } - } - // if we have any elements left over (e.g. .a& .b == .b) - // add them on to all the current selectors - mergeElementsOnToSelectors(currentElements, newSelectors); + // if we have any elements left over (e.g. .a& .b == .b) + // add them on to all the current selectors + mergeElementsOnToSelectors(currentElements, newSelectors); - for (i = 0; i < newSelectors.length; i++) { - length = newSelectors[i].length; - if (length > 0) { - paths.push(newSelectors[i]); - lastSelector = newSelectors[i][length - 1]; - newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList); + for (i = 0; i < newSelectors.length; i++) { + length = newSelectors[i].length; + if (length > 0) { + paths.push(newSelectors[i]); + lastSelector = newSelectors[i][length - 1]; + newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList); + } } + + return hadParentSelector; } - return hadParentSelector; - } + function deriveSelector(visibilityInfo, deriveFrom) { + const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition); + newSelector.copyVisibilityInfo(visibilityInfo); + return newSelector; + } - function deriveSelector(visibilityInfo, deriveFrom) { - var newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition); - newSelector.copyVisibilityInfo(visibilityInfo); - return newSelector; - } + // joinSelector code follows + let i; - // joinSelector code follows - var i, newPaths, hadParentSelector; + let newPaths; + let hadParentSelector; - newPaths = []; - hadParentSelector = replaceParentSelector(newPaths, context, selector); + newPaths = []; + hadParentSelector = replaceParentSelector(newPaths, context, selector); - if (!hadParentSelector) { - if (context.length > 0) { - newPaths = []; - for (i = 0; i < context.length; i++) { + if (!hadParentSelector) { + if (context.length > 0) { + newPaths = []; + for (i = 0; i < context.length; i++) { - var concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo())); + const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo())); - concatenated.push(selector); - newPaths.push(concatenated); + concatenated.push(selector); + newPaths.push(concatenated); + } + } + else { + newPaths = [[selector]]; } } - else { - newPaths = [[selector]]; - } - } - for (i = 0; i < newPaths.length; i++) { - paths.push(newPaths[i]); + for (i = 0; i < newPaths.length; i++) { + paths.push(newPaths[i]); + } } +} -}; -module.exports = Ruleset; +Ruleset.prototype.type = 'Ruleset'; +Ruleset.prototype.isRuleset = true; +export default Ruleset; diff --git a/lib/less/tree/selector.js b/lib/less/tree/selector.js index 16ac803c8..163205607 100644 --- a/lib/less/tree/selector.js +++ b/lib/less/tree/selector.js @@ -1,131 +1,144 @@ -var Node = require('./node'), - Element = require('./element'), - LessError = require('../less-error'); - -var Selector = function (elements, extendList, condition, index, currentFileInfo, visibilityInfo) { - this.extendList = extendList; - this.condition = condition; - this.evaldCondition = !condition; - this._index = index; - this._fileInfo = currentFileInfo; - this.elements = this.getElements(elements); - this.mixinElements_ = undefined; - this.copyVisibilityInfo(visibilityInfo); - this.setParent(this.elements, this); -}; -Selector.prototype = new Node(); -Selector.prototype.type = 'Selector'; -Selector.prototype.accept = function (visitor) { - if (this.elements) { - this.elements = visitor.visitArray(this.elements); +import Node from './node'; +import Element from './element'; +import LessError from '../less-error'; + +class Selector extends Node { + constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) { + this.extendList = extendList; + this.condition = condition; + this.evaldCondition = !condition; + this._index = index; + this._fileInfo = currentFileInfo; + this.elements = this.getElements(elements); + this.mixinElements_ = undefined; + this.copyVisibilityInfo(visibilityInfo); + this.setParent(this.elements, this); } - if (this.extendList) { - this.extendList = visitor.visitArray(this.extendList); + + accept(visitor) { + if (this.elements) { + this.elements = visitor.visitArray(this.elements); + } + if (this.extendList) { + this.extendList = visitor.visitArray(this.extendList); + } + if (this.condition) { + this.condition = visitor.visit(this.condition); + } } - if (this.condition) { - this.condition = visitor.visit(this.condition); + + createDerived(elements, extendList, evaldCondition) { + elements = this.getElements(elements); + const newSelector = new Selector(elements, extendList || this.extendList, + null, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition; + newSelector.mediaEmpty = this.mediaEmpty; + return newSelector; } -}; -Selector.prototype.createDerived = function(elements, extendList, evaldCondition) { - elements = this.getElements(elements); - var newSelector = new Selector(elements, extendList || this.extendList, - null, this.getIndex(), this.fileInfo(), this.visibilityInfo()); - newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition; - newSelector.mediaEmpty = this.mediaEmpty; - return newSelector; -}; -Selector.prototype.getElements = function(els) { - if (!els) { - return [new Element('', '&', false, this._index, this._fileInfo)]; + + getElements(els) { + if (!els) { + return [new Element('', '&', false, this._index, this._fileInfo)]; + } + if (typeof els === 'string') { + this.parse.parseNode( + els, + ['selector'], + this._index, + this._fileInfo, + function(err, result) { + if (err) { + throw new LessError({ + index: err.index, + message: err.message + }, this.parse.imports, this._fileInfo.filename); + } + els = result[0].elements; + }); + } + return els; + } + + createEmptySelectors() { + const el = new Element('', '&', false, this._index, this._fileInfo); + const sels = [new Selector([el], null, null, this._index, this._fileInfo)]; + sels[0].mediaEmpty = true; + return sels; } - if (typeof els === 'string') { - this.parse.parseNode( - els, - ['selector'], - this._index, - this._fileInfo, - function(err, result) { - if (err) { - throw new LessError({ - index: err.index, - message: err.message - }, this.parse.imports, this._fileInfo.filename); + + match(other) { + const elements = this.elements; + const len = elements.length; + let olen; + let i; + + other = other.mixinElements(); + olen = other.length; + if (olen === 0 || len < olen) { + return 0; + } else { + for (i = 0; i < olen; i++) { + if (elements[i].value !== other[i]) { + return 0; } - els = result[0].elements; - }); + } + } + + return olen; // return number of matched elements } - return els; -}; -Selector.prototype.createEmptySelectors = function() { - var el = new Element('', '&', false, this._index, this._fileInfo), - sels = [new Selector([el], null, null, this._index, this._fileInfo)]; - sels[0].mediaEmpty = true; - return sels; -}; -Selector.prototype.match = function (other) { - var elements = this.elements, - len = elements.length, - olen, i; - - other = other.mixinElements(); - olen = other.length; - if (olen === 0 || len < olen) { - return 0; - } else { - for (i = 0; i < olen; i++) { - if (elements[i].value !== other[i]) { - return 0; + + mixinElements() { + if (this.mixinElements_) { + return this.mixinElements_; + } + + let elements = this.elements.map( v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\*\.\w-]([\w-]|(\\.))*/g); + + if (elements) { + if (elements[0] === '&') { + elements.shift(); } + } else { + elements = []; } + + return (this.mixinElements_ = elements); } - return olen; // return number of matched elements -}; -Selector.prototype.mixinElements = function() { - if (this.mixinElements_) { - return this.mixinElements_; + isJustParentSelector() { + return !this.mediaEmpty && + this.elements.length === 1 && + this.elements[0].value === '&' && + (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === ''); } - var elements = this.elements.map( function(v) { - return v.combinator.value + (v.value.value || v.value); - }).join('').match(/[,&#\*\.\w-]([\w-]|(\\.))*/g); + eval(context) { + const evaldCondition = this.condition && this.condition.eval(context); + let elements = this.elements; + let extendList = this.extendList; - if (elements) { - if (elements[0] === '&') { - elements.shift(); - } - } else { - elements = []; + elements = elements && elements.map(e => e.eval(context)); + extendList = extendList && extendList.map(extend => extend.eval(context)); + + return this.createDerived(elements, extendList, evaldCondition); } - return (this.mixinElements_ = elements); -}; -Selector.prototype.isJustParentSelector = function() { - return !this.mediaEmpty && - this.elements.length === 1 && - this.elements[0].value === '&' && - (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === ''); -}; -Selector.prototype.eval = function (context) { - var evaldCondition = this.condition && this.condition.eval(context), - elements = this.elements, extendList = this.extendList; - - elements = elements && elements.map(function (e) { return e.eval(context); }); - extendList = extendList && extendList.map(function(extend) { return extend.eval(context); }); - - return this.createDerived(elements, extendList, evaldCondition); -}; -Selector.prototype.genCSS = function (context, output) { - var i, element; - if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') { - output.add(' ', this.fileInfo(), this.getIndex()); + genCSS(context, output) { + let i; + let element; + if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') { + output.add(' ', this.fileInfo(), this.getIndex()); + } + for (i = 0; i < this.elements.length; i++) { + element = this.elements[i]; + element.genCSS(context, output); + } } - for (i = 0; i < this.elements.length; i++) { - element = this.elements[i]; - element.genCSS(context, output); + + getIsOutput() { + return this.evaldCondition; } -}; -Selector.prototype.getIsOutput = function() { - return this.evaldCondition; -}; -module.exports = Selector; +} + +Selector.prototype.type = 'Selector'; +export default Selector; diff --git a/lib/less/tree/unicode-descriptor.js b/lib/less/tree/unicode-descriptor.js index 5fd846b27..07c0a9596 100644 --- a/lib/less/tree/unicode-descriptor.js +++ b/lib/less/tree/unicode-descriptor.js @@ -1,9 +1,11 @@ -var Node = require('./node'); +import Node from './node'; + +class UnicodeDescriptor extends Node { + constructor(value) { + this.value = value; + } +} -var UnicodeDescriptor = function (value) { - this.value = value; -}; -UnicodeDescriptor.prototype = new Node(); UnicodeDescriptor.prototype.type = 'UnicodeDescriptor'; -module.exports = UnicodeDescriptor; +export default UnicodeDescriptor; diff --git a/lib/less/tree/unit.js b/lib/less/tree/unit.js index 91c2e27a3..8459a902a 100644 --- a/lib/less/tree/unit.js +++ b/lib/less/tree/unit.js @@ -1,121 +1,139 @@ -var Node = require('./node'), - unitConversions = require('../data/unit-conversions'), - utils = require('../utils'); - -var Unit = function (numerator, denominator, backupUnit) { - this.numerator = numerator ? utils.copyArray(numerator).sort() : []; - this.denominator = denominator ? utils.copyArray(denominator).sort() : []; - if (backupUnit) { - this.backupUnit = backupUnit; - } else if (numerator && numerator.length) { - this.backupUnit = numerator[0]; +import Node from './node'; +import unitConversions from '../data/unit-conversions'; +import utils from '../utils'; + +class Unit extends Node { + constructor(numerator, denominator, backupUnit) { + this.numerator = numerator ? utils.copyArray(numerator).sort() : []; + this.denominator = denominator ? utils.copyArray(denominator).sort() : []; + if (backupUnit) { + this.backupUnit = backupUnit; + } else if (numerator && numerator.length) { + this.backupUnit = numerator[0]; + } } -}; -Unit.prototype = new Node(); -Unit.prototype.type = 'Unit'; -Unit.prototype.clone = function () { - return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit); -}; -Unit.prototype.genCSS = function (context, output) { - // Dimension checks the unit is singular and throws an error if in strict math mode. - var strictUnits = context && context.strictUnits; - if (this.numerator.length === 1) { - output.add(this.numerator[0]); // the ideal situation - } else if (!strictUnits && this.backupUnit) { - output.add(this.backupUnit); - } else if (!strictUnits && this.denominator.length) { - output.add(this.denominator[0]); + clone() { + return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit); } -}; -Unit.prototype.toString = function () { - var i, returnStr = this.numerator.join('*'); - for (i = 0; i < this.denominator.length; i++) { - returnStr += '/' + this.denominator[i]; + + genCSS(context, output) { + // Dimension checks the unit is singular and throws an error if in strict math mode. + const strictUnits = context && context.strictUnits; + if (this.numerator.length === 1) { + output.add(this.numerator[0]); // the ideal situation + } else if (!strictUnits && this.backupUnit) { + output.add(this.backupUnit); + } else if (!strictUnits && this.denominator.length) { + output.add(this.denominator[0]); + } } - return returnStr; -}; -Unit.prototype.compare = function (other) { - return this.is(other.toString()) ? 0 : undefined; -}; -Unit.prototype.is = function (unitString) { - return this.toString().toUpperCase() === unitString.toUpperCase(); -}; -Unit.prototype.isLength = function () { - return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS()); -}; -Unit.prototype.isEmpty = function () { - return this.numerator.length === 0 && this.denominator.length === 0; -}; -Unit.prototype.isSingular = function() { - return this.numerator.length <= 1 && this.denominator.length === 0; -}; -Unit.prototype.map = function(callback) { - var i; - - for (i = 0; i < this.numerator.length; i++) { - this.numerator[i] = callback(this.numerator[i], false); + + toString() { + let i; + let returnStr = this.numerator.join('*'); + for (i = 0; i < this.denominator.length; i++) { + returnStr += `/${this.denominator[i]}`; + } + return returnStr; } - for (i = 0; i < this.denominator.length; i++) { - this.denominator[i] = callback(this.denominator[i], true); + compare(other) { + return this.is(other.toString()) ? 0 : undefined; } -}; -Unit.prototype.usedUnits = function() { - var group, result = {}, mapUnit, groupName; - - mapUnit = function (atomicUnit) { - /* jshint loopfunc:true */ - if (group.hasOwnProperty(atomicUnit) && !result[groupName]) { - result[groupName] = atomicUnit; - } - return atomicUnit; - }; + is(unitString) { + return this.toString().toUpperCase() === unitString.toUpperCase(); + } - for (groupName in unitConversions) { - if (unitConversions.hasOwnProperty(groupName)) { - group = unitConversions[groupName]; + isLength() { + return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS()); + } - this.map(mapUnit); - } + isEmpty() { + return this.numerator.length === 0 && this.denominator.length === 0; + } + + isSingular() { + return this.numerator.length <= 1 && this.denominator.length === 0; } - return result; -}; -Unit.prototype.cancel = function () { - var counter = {}, atomicUnit, i; + map(callback) { + let i; + + for (i = 0; i < this.numerator.length; i++) { + this.numerator[i] = callback(this.numerator[i], false); + } - for (i = 0; i < this.numerator.length; i++) { - atomicUnit = this.numerator[i]; - counter[atomicUnit] = (counter[atomicUnit] || 0) + 1; + for (i = 0; i < this.denominator.length; i++) { + this.denominator[i] = callback(this.denominator[i], true); + } } - for (i = 0; i < this.denominator.length; i++) { - atomicUnit = this.denominator[i]; - counter[atomicUnit] = (counter[atomicUnit] || 0) - 1; + usedUnits() { + let group; + const result = {}; + let mapUnit; + let groupName; + + mapUnit = atomicUnit => { + /* jshint loopfunc:true */ + if (group.hasOwnProperty(atomicUnit) && !result[groupName]) { + result[groupName] = atomicUnit; + } + + return atomicUnit; + }; + + for (groupName in unitConversions) { + if (unitConversions.hasOwnProperty(groupName)) { + group = unitConversions[groupName]; + + this.map(mapUnit); + } + } + + return result; } - this.numerator = []; - this.denominator = []; + cancel() { + const counter = {}; + let atomicUnit; + let i; - for (atomicUnit in counter) { - if (counter.hasOwnProperty(atomicUnit)) { - var count = counter[atomicUnit]; + for (i = 0; i < this.numerator.length; i++) { + atomicUnit = this.numerator[i]; + counter[atomicUnit] = (counter[atomicUnit] || 0) + 1; + } - if (count > 0) { - for (i = 0; i < count; i++) { - this.numerator.push(atomicUnit); - } - } else if (count < 0) { - for (i = 0; i < -count; i++) { - this.denominator.push(atomicUnit); + for (i = 0; i < this.denominator.length; i++) { + atomicUnit = this.denominator[i]; + counter[atomicUnit] = (counter[atomicUnit] || 0) - 1; + } + + this.numerator = []; + this.denominator = []; + + for (atomicUnit in counter) { + if (counter.hasOwnProperty(atomicUnit)) { + const count = counter[atomicUnit]; + + if (count > 0) { + for (i = 0; i < count; i++) { + this.numerator.push(atomicUnit); + } + } else if (count < 0) { + for (i = 0; i < -count; i++) { + this.denominator.push(atomicUnit); + } } } } + + this.numerator.sort(); + this.denominator.sort(); } +} - this.numerator.sort(); - this.denominator.sort(); -}; -module.exports = Unit; +Unit.prototype.type = 'Unit'; +export default Unit; diff --git a/lib/less/tree/url.js b/lib/less/tree/url.js index 234292e2d..ddae3a4ba 100644 --- a/lib/less/tree/url.js +++ b/lib/less/tree/url.js @@ -1,58 +1,63 @@ -var Node = require('./node'); - -var URL = function (val, index, currentFileInfo, isEvald) { - this.value = val; - this._index = index; - this._fileInfo = currentFileInfo; - this.isEvald = isEvald; -}; -URL.prototype = new Node(); -URL.prototype.type = 'Url'; -URL.prototype.accept = function (visitor) { - this.value = visitor.visit(this.value); -}; -URL.prototype.genCSS = function (context, output) { - output.add('url('); - this.value.genCSS(context, output); - output.add(')'); -}; -URL.prototype.eval = function (context) { - var val = this.value.eval(context), - rootpath; - - if (!this.isEvald) { - // Add the rootpath if the URL requires a rewrite - rootpath = this.fileInfo() && this.fileInfo().rootpath; - if (typeof rootpath === 'string' && - typeof val.value === 'string' && - context.pathRequiresRewrite(val.value)) { - if (!val.quote) { - rootpath = escapePath(rootpath); +import Node from './node'; + +class URL extends Node { + constructor(val, index, currentFileInfo, isEvald) { + this.value = val; + this._index = index; + this._fileInfo = currentFileInfo; + this.isEvald = isEvald; + } + + accept(visitor) { + this.value = visitor.visit(this.value); + } + + genCSS(context, output) { + output.add('url('); + this.value.genCSS(context, output); + output.add(')'); + } + + eval(context) { + const val = this.value.eval(context); + let rootpath; + + if (!this.isEvald) { + // Add the rootpath if the URL requires a rewrite + rootpath = this.fileInfo() && this.fileInfo().rootpath; + if (typeof rootpath === 'string' && + typeof val.value === 'string' && + context.pathRequiresRewrite(val.value)) { + if (!val.quote) { + rootpath = escapePath(rootpath); + } + val.value = context.rewritePath(val.value, rootpath); + } else { + val.value = context.normalizePath(val.value); } - val.value = context.rewritePath(val.value, rootpath); - } else { - val.value = context.normalizePath(val.value); - } - // Add url args if enabled - if (context.urlArgs) { - if (!val.value.match(/^\s*data:/)) { - var delimiter = val.value.indexOf('?') === -1 ? '?' : '&'; - var urlArgs = delimiter + context.urlArgs; - if (val.value.indexOf('#') !== -1) { - val.value = val.value.replace('#', urlArgs + '#'); - } else { - val.value += urlArgs; + // Add url args if enabled + if (context.urlArgs) { + if (!val.value.match(/^\s*data:/)) { + const delimiter = val.value.indexOf('?') === -1 ? '?' : '&'; + const urlArgs = delimiter + context.urlArgs; + if (val.value.indexOf('#') !== -1) { + val.value = val.value.replace('#', `${urlArgs}#`); + } else { + val.value += urlArgs; + } } } } + + return new URL(val, this.getIndex(), this.fileInfo(), true); } +} - return new URL(val, this.getIndex(), this.fileInfo(), true); -}; +URL.prototype.type = 'Url'; function escapePath(path) { - return path.replace(/[\(\)'"\s]/g, function(match) { return '\\' + match; }); + return path.replace(/[\(\)'"\s]/g, match => `\\${match}`); } -module.exports = URL; +export default URL; diff --git a/lib/less/tree/value.js b/lib/less/tree/value.js index cd3fa3904..3b86a6873 100644 --- a/lib/less/tree/value.js +++ b/lib/less/tree/value.js @@ -1,39 +1,42 @@ -var Node = require('./node'); +import Node from './node'; -var Value = function (value) { - if (!value) { - throw new Error('Value requires an array argument'); - } - if (!Array.isArray(value)) { - this.value = [ value ]; - } - else { - this.value = value; +class Value extends Node { + constructor(value) { + if (!value) { + throw new Error('Value requires an array argument'); + } + if (!Array.isArray(value)) { + this.value = [ value ]; + } + else { + this.value = value; + } } -}; -Value.prototype = new Node(); -Value.prototype.type = 'Value'; -Value.prototype.accept = function (visitor) { - if (this.value) { - this.value = visitor.visitArray(this.value); + + accept(visitor) { + if (this.value) { + this.value = visitor.visitArray(this.value); + } } -}; -Value.prototype.eval = function (context) { - if (this.value.length === 1) { - return this.value[0].eval(context); - } else { - return new Value(this.value.map(function (v) { - return v.eval(context); - })); + + eval(context) { + if (this.value.length === 1) { + return this.value[0].eval(context); + } else { + return new Value(this.value.map(v => v.eval(context))); + } } -}; -Value.prototype.genCSS = function (context, output) { - var i; - for (i = 0; i < this.value.length; i++) { - this.value[i].genCSS(context, output); - if (i + 1 < this.value.length) { - output.add((context && context.compress) ? ',' : ', '); + + genCSS(context, output) { + let i; + for (i = 0; i < this.value.length; i++) { + this.value[i].genCSS(context, output); + if (i + 1 < this.value.length) { + output.add((context && context.compress) ? ',' : ', '); + } } } -}; -module.exports = Value; +} + +Value.prototype.type = 'Value'; +export default Value; diff --git a/lib/less/tree/variable-call.js b/lib/less/tree/variable-call.js index ab9b7c647..a8ad7d374 100644 --- a/lib/less/tree/variable-call.js +++ b/lib/less/tree/variable-call.js @@ -1,39 +1,43 @@ -var Node = require('./node'), - Variable = require('./variable'), - Ruleset = require('./ruleset'), - DetachedRuleset = require('./detached-ruleset'), - LessError = require('../less-error'); +import Node from './node'; +import Variable from './variable'; +import Ruleset from './ruleset'; +import DetachedRuleset from './detached-ruleset'; +import LessError from '../less-error'; -var VariableCall = function (variable, index, currentFileInfo) { - this.variable = variable; - this._index = index; - this._fileInfo = currentFileInfo; - this.allowRoot = true; -}; -VariableCall.prototype = new Node(); -VariableCall.prototype.type = 'VariableCall'; -VariableCall.prototype.eval = function (context) { - var rules, detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context), - error = new LessError({message: 'Could not evaluate variable call ' + this.variable}); +class VariableCall extends Node { + constructor(variable, index, currentFileInfo) { + this.variable = variable; + this._index = index; + this._fileInfo = currentFileInfo; + this.allowRoot = true; + } - if (!detachedRuleset.ruleset) { - if (detachedRuleset.rules) { - rules = detachedRuleset; - } - else if (Array.isArray(detachedRuleset)) { - rules = new Ruleset('', detachedRuleset); - } - else if (Array.isArray(detachedRuleset.value)) { - rules = new Ruleset('', detachedRuleset.value); + eval(context) { + let rules; + let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context); + const error = new LessError({message: `Could not evaluate variable call ${this.variable}`}); + + if (!detachedRuleset.ruleset) { + if (detachedRuleset.rules) { + rules = detachedRuleset; + } + else if (Array.isArray(detachedRuleset)) { + rules = new Ruleset('', detachedRuleset); + } + else if (Array.isArray(detachedRuleset.value)) { + rules = new Ruleset('', detachedRuleset.value); + } + else { + throw error; + } + detachedRuleset = new DetachedRuleset(rules); } - else { - throw error; + if (detachedRuleset.ruleset) { + return detachedRuleset.callEval(context); } - detachedRuleset = new DetachedRuleset(rules); - } - if (detachedRuleset.ruleset) { - return detachedRuleset.callEval(context); + throw error; } - throw error; -}; -module.exports = VariableCall; +} + +VariableCall.prototype.type = 'VariableCall'; +export default VariableCall; diff --git a/lib/less/tree/variable.js b/lib/less/tree/variable.js index 9ead289c4..fdf13ad86 100644 --- a/lib/less/tree/variable.js +++ b/lib/less/tree/variable.js @@ -1,60 +1,65 @@ -var Node = require('./node'), - Call = require('./call'); - -var Variable = function (name, index, currentFileInfo) { - this.name = name; - this._index = index; - this._fileInfo = currentFileInfo; -}; -Variable.prototype = new Node(); -Variable.prototype.type = 'Variable'; -Variable.prototype.eval = function (context) { - var variable, name = this.name; +import Node from './node'; +import Call from './call'; - if (name.indexOf('@@') === 0) { - name = '@' + new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value; +class Variable extends Node { + constructor(name, index, currentFileInfo) { + this.name = name; + this._index = index; + this._fileInfo = currentFileInfo; } - if (this.evaluating) { - throw { type: 'Name', - message: 'Recursive variable definition for ' + name, - filename: this.fileInfo().filename, - index: this.getIndex() }; - } + eval(context) { + let variable; + let name = this.name; - this.evaluating = true; + if (name.indexOf('@@') === 0) { + name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`; + } - variable = this.find(context.frames, function (frame) { - var v = frame.variable(name); - if (v) { - if (v.important) { - var importantScope = context.importantScope[context.importantScope.length - 1]; - importantScope.important = v.important; - } - // If in calc, wrap vars in a function call to cascade evaluate args first - if (context.inCalc) { - return (new Call('_SELF', [v.value])).eval(context); - } - else { - return v.value.eval(context); + if (this.evaluating) { + throw { type: 'Name', + message: `Recursive variable definition for ${name}`, + filename: this.fileInfo().filename, + index: this.getIndex() }; + } + + this.evaluating = true; + + variable = this.find(context.frames, frame => { + const v = frame.variable(name); + if (v) { + if (v.important) { + const importantScope = context.importantScope[context.importantScope.length - 1]; + importantScope.important = v.important; + } + // If in calc, wrap vars in a function call to cascade evaluate args first + if (context.inCalc) { + return (new Call('_SELF', [v.value])).eval(context); + } + else { + return v.value.eval(context); + } } + }); + if (variable) { + this.evaluating = false; + return variable; + } else { + throw { type: 'Name', + message: `variable ${name} is undefined`, + filename: this.fileInfo().filename, + index: this.getIndex() }; } - }); - if (variable) { - this.evaluating = false; - return variable; - } else { - throw { type: 'Name', - message: 'variable ' + name + ' is undefined', - filename: this.fileInfo().filename, - index: this.getIndex() }; } -}; -Variable.prototype.find = function (obj, fun) { - for (var i = 0, r; i < obj.length; i++) { - r = fun.call(obj, obj[i]); - if (r) { return r; } + + find(obj, fun) { + for (let i = 0, r; i < obj.length; i++) { + r = fun.call(obj, obj[i]); + if (r) { return r; } + } + return null; } - return null; -}; -module.exports = Variable; +} + +Variable.prototype.type = 'Variable'; +export default Variable; diff --git a/lib/less/utils.js b/lib/less/utils.js index ade25c832..dce890bc2 100644 --- a/lib/less/utils.js +++ b/lib/less/utils.js @@ -1,12 +1,13 @@ /* jshint proto: true */ -var Constants = require('./constants'); -var clone = require('clone'); +import Constants from './constants'; -var utils = { +import clone from 'clone'; + +const utils = { getLocation: function(index, inputStream) { - var n = index + 1, - line = null, - column = -1; + let n = index + 1; + let line = null; + let column = -1; while (--n >= 0 && inputStream.charAt(n) !== '\n') { column++; @@ -17,22 +18,23 @@ var utils = { } return { - line: line, - column: column + line, + column }; }, copyArray: function(arr) { - var i, length = arr.length, - copy = new Array(length); - + let i; + const length = arr.length; + const copy = new Array(length); + for (i = 0; i < length; i++) { copy[i] = arr[i]; } return copy; }, clone: function (obj) { - var cloned = {}; - for (var prop in obj) { + const cloned = {}; + for (const prop in obj) { if (obj.hasOwnProperty(prop)) { cloned[prop] = obj[prop]; } @@ -43,7 +45,7 @@ var utils = { if (obj2 && obj2._defaults) { return obj2; } - var opts = utils.defaults(obj1, obj2); + const opts = utils.defaults(obj1, obj2); if (opts.strictMath) { opts.math = Constants.Math.STRICT_LEGACY; } @@ -83,28 +85,27 @@ var utils = { return opts; }, defaults: function(obj1, obj2) { - var newObj = obj2 || {}; + let newObj = obj2 || {}; if (!obj2._defaults) { newObj = {}; - var defaults = clone(obj1); + const defaults = clone(obj1); newObj._defaults = defaults; - var cloned = obj2 ? clone(obj2) : {}; + const cloned = obj2 ? clone(obj2) : {}; Object.assign(newObj, defaults, cloned); } return newObj; }, merge: function(obj1, obj2) { - for (var prop in obj2) { + for (const prop in obj2) { if (obj2.hasOwnProperty(prop)) { obj1[prop] = obj2[prop]; } } return obj1; }, - flattenArray: function(arr, result) { - result = result || []; - for (var i = 0, length = arr.length; i < length; i++) { - var value = arr[i]; + flattenArray: function(arr, result = []) { + for (let i = 0, length = arr.length; i < length; i++) { + const value = arr[i]; if (Array.isArray(value)) { utils.flattenArray(value, result); } else { @@ -117,4 +118,4 @@ var utils = { } }; -module.exports = utils; \ No newline at end of file +export default utils; \ No newline at end of file diff --git a/lib/less/visitors/extend-visitor.js b/lib/less/visitors/extend-visitor.js index be13f8242..895944c45 100644 --- a/lib/less/visitors/extend-visitor.js +++ b/lib/less/visitors/extend-visitor.js @@ -1,37 +1,46 @@ -var tree = require('../tree'), - Visitor = require('./visitor'), - logger = require('../logger'), - utils = require('../utils'); +import tree from '../tree'; +import Visitor from './visitor'; +import logger from '../logger'; +import utils from '../utils'; /* jshint loopfunc:true */ -var ExtendFinderVisitor = function() { - this._visitor = new Visitor(this); - this.contexts = []; - this.allExtendsStack = [[]]; -}; +class ExtendFinderVisitor { + constructor() { + this._visitor = new Visitor(this); + this.contexts = []; + this.allExtendsStack = [[]]; + } -ExtendFinderVisitor.prototype = { - run: function (root) { + run(root) { root = this._visitor.visit(root); root.allExtends = this.allExtendsStack[0]; return root; - }, - visitDeclaration: function (declNode, visitArgs) { + } + + visitDeclaration(declNode, visitArgs) { visitArgs.visitDeeper = false; - }, - visitMixinDefinition: function (mixinDefinitionNode, visitArgs) { + } + + visitMixinDefinition(mixinDefinitionNode, visitArgs) { visitArgs.visitDeeper = false; - }, - visitRuleset: function (rulesetNode, visitArgs) { + } + + visitRuleset(rulesetNode, visitArgs) { if (rulesetNode.root) { return; } - var i, j, extend, allSelectorsExtendList = [], extendList; + let i; + let j; + let extend; + const allSelectorsExtendList = []; + let extendList; // get &:extend(.a); rules which apply to all selectors in this ruleset - var rules = rulesetNode.rules, ruleCnt = rules ? rules.length : 0; + const rules = rulesetNode.rules; + + const ruleCnt = rules ? rules.length : 0; for (i = 0; i < ruleCnt; i++) { if (rulesetNode.rules[i] instanceof tree.Extend) { allSelectorsExtendList.push(rules[i]); @@ -41,19 +50,17 @@ ExtendFinderVisitor.prototype = { // now find every selector and apply the extends that apply to all extends // and the ones which apply to an individual extend - var paths = rulesetNode.paths; + const paths = rulesetNode.paths; for (i = 0; i < paths.length; i++) { - var selectorPath = paths[i], - selector = selectorPath[selectorPath.length - 1], - selExtendList = selector.extendList; + const selectorPath = paths[i]; + const selector = selectorPath[selectorPath.length - 1]; + const selExtendList = selector.extendList; extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList) : allSelectorsExtendList; if (extendList) { - extendList = extendList.map(function(allSelectorsExtend) { - return allSelectorsExtend.clone(); - }); + extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone()); } for (j = 0; j < extendList.length; j++) { @@ -67,62 +74,67 @@ ExtendFinderVisitor.prototype = { } this.contexts.push(rulesetNode.selectors); - }, - visitRulesetOut: function (rulesetNode) { + } + + visitRulesetOut(rulesetNode) { if (!rulesetNode.root) { this.contexts.length = this.contexts.length - 1; } - }, - visitMedia: function (mediaNode, visitArgs) { + } + + visitMedia(mediaNode, visitArgs) { mediaNode.allExtends = []; this.allExtendsStack.push(mediaNode.allExtends); - }, - visitMediaOut: function (mediaNode) { + } + + visitMediaOut(mediaNode) { this.allExtendsStack.length = this.allExtendsStack.length - 1; - }, - visitAtRule: function (atRuleNode, visitArgs) { + } + + visitAtRule(atRuleNode, visitArgs) { atRuleNode.allExtends = []; this.allExtendsStack.push(atRuleNode.allExtends); - }, - visitAtRuleOut: function (atRuleNode) { + } + + visitAtRuleOut(atRuleNode) { this.allExtendsStack.length = this.allExtendsStack.length - 1; } -}; +} -var ProcessExtendsVisitor = function() { - this._visitor = new Visitor(this); -}; +class ProcessExtendsVisitor { + constructor() { + this._visitor = new Visitor(this); + } -ProcessExtendsVisitor.prototype = { - run: function(root) { - var extendFinder = new ExtendFinderVisitor(); + run(root) { + const extendFinder = new ExtendFinderVisitor(); this.extendIndices = {}; extendFinder.run(root); if (!extendFinder.foundExtends) { return root; } root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends)); this.allExtendsStack = [root.allExtends]; - var newRoot = this._visitor.visit(root); + const newRoot = this._visitor.visit(root); this.checkExtendsForNonMatched(root.allExtends); return newRoot; - }, - checkExtendsForNonMatched: function(extendList) { - var indices = this.extendIndices; - extendList.filter(function(extend) { - return !extend.hasFoundMatches && extend.parent_ids.length == 1; - }).forEach(function(extend) { - var selector = '_unknown_'; + } + + checkExtendsForNonMatched(extendList) { + const indices = this.extendIndices; + extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => { + let selector = '_unknown_'; try { selector = extend.selector.toCSS({}); } catch (_) {} - if (!indices[extend.index + ' ' + selector]) { - indices[extend.index + ' ' + selector] = true; - logger.warn('extend \'' + selector + '\' has no matches'); + if (!indices[`${extend.index} ${selector}`]) { + indices[`${extend.index} ${selector}`] = true; + logger.warn(`extend '${selector}' has no matches`); } }); - }, - doExtendChaining: function (extendsList, extendsListTarget, iterationCount) { + } + + doExtendChaining(extendsList, extendsListTarget, iterationCount) { // // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering // and pasting the selector we would do normally, but we are also adding an extend with the same target selector @@ -132,8 +144,17 @@ ProcessExtendsVisitor.prototype = { // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already // processed if we look at each selector at a time, as is done in visitRuleset - var extendIndex, targetExtendIndex, matches, extendsToAdd = [], newSelector, extendVisitor = this, selectorPath, - extend, targetExtend, newExtend; + let extendIndex; + + let targetExtendIndex; + let matches; + const extendsToAdd = []; + let newSelector; + const extendVisitor = this; + let selectorPath; + let extend; + let targetExtend; + let newExtend; iterationCount = iterationCount || 0; @@ -160,8 +181,8 @@ ProcessExtendsVisitor.prototype = { extend.hasFoundMatches = true; // we found a match, so for each self selector.. - extend.selfSelectors.forEach(function(selfSelector) { - var info = targetExtend.visibilityInfo(); + extend.selfSelectors.forEach(selfSelector => { + const info = targetExtend.visibilityInfo(); // process the extend as usual newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible()); @@ -197,15 +218,14 @@ ProcessExtendsVisitor.prototype = { // may no longer be needed. this.extendChainCount++; if (iterationCount > 100) { - var selectorOne = '{unable to calculate}'; - var selectorTwo = '{unable to calculate}'; + let selectorOne = '{unable to calculate}'; + let selectorTwo = '{unable to calculate}'; try { selectorOne = extendsToAdd[0].selfSelectors[0].toCSS(); selectorTwo = extendsToAdd[0].selector.toCSS(); } catch (e) {} - throw { message: 'extend circular reference detected. One of the circular extends is currently:' + - selectorOne + ':extend(' + selectorTwo + ')'}; + throw { message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})`}; } // now process the new extends on the existing rules so that we can handle a extending b extending c extending @@ -214,22 +234,31 @@ ProcessExtendsVisitor.prototype = { } else { return extendsToAdd; } - }, - visitDeclaration: function (ruleNode, visitArgs) { + } + + visitDeclaration(ruleNode, visitArgs) { visitArgs.visitDeeper = false; - }, - visitMixinDefinition: function (mixinDefinitionNode, visitArgs) { + } + + visitMixinDefinition(mixinDefinitionNode, visitArgs) { visitArgs.visitDeeper = false; - }, - visitSelector: function (selectorNode, visitArgs) { + } + + visitSelector(selectorNode, visitArgs) { visitArgs.visitDeeper = false; - }, - visitRuleset: function (rulesetNode, visitArgs) { + } + + visitRuleset(rulesetNode, visitArgs) { if (rulesetNode.root) { return; } - var matches, pathIndex, extendIndex, allExtends = this.allExtendsStack[this.allExtendsStack.length - 1], - selectorsToAdd = [], extendVisitor = this, selectorPath; + let matches; + let pathIndex; + let extendIndex; + const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1]; + const selectorsToAdd = []; + const extendVisitor = this; + let selectorPath; // look at each selector path in the ruleset, find any extend matches and then copy, find and replace @@ -239,7 +268,7 @@ ProcessExtendsVisitor.prototype = { // extending extends happens initially, before the main pass if (rulesetNode.extendOnEveryPath) { continue; } - var extendList = selectorPath[selectorPath.length - 1].extendList; + const extendList = selectorPath[selectorPath.length - 1].extendList; if (extendList && extendList.length) { continue; } matches = this.findMatch(allExtends[extendIndex], selectorPath); @@ -247,8 +276,8 @@ ProcessExtendsVisitor.prototype = { if (matches.length) { allExtends[extendIndex].hasFoundMatches = true; - allExtends[extendIndex].selfSelectors.forEach(function(selfSelector) { - var extendedSelectors; + allExtends[extendIndex].selfSelectors.forEach(selfSelector => { + let extendedSelectors; extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible()); selectorsToAdd.push(extendedSelectors); }); @@ -256,17 +285,25 @@ ProcessExtendsVisitor.prototype = { } } rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd); - }, - findMatch: function (extend, haystackSelectorPath) { + } + + findMatch(extend, haystackSelectorPath) { // // look through the haystack selector path to try and find the needle - extend.selector // returns an array of selector matches that can then be replaced // - var haystackSelectorIndex, hackstackSelector, hackstackElementIndex, haystackElement, - targetCombinator, i, - extendVisitor = this, - needleElements = extend.selector.elements, - potentialMatches = [], potentialMatch, matches = []; + let haystackSelectorIndex; + + let hackstackSelector; + let hackstackElementIndex; + let haystackElement; + let targetCombinator; + let i; + const extendVisitor = this; + const needleElements = extend.selector.elements; + const potentialMatches = []; + let potentialMatch; + const matches = []; // loop through the haystack elements for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) { @@ -327,8 +364,9 @@ ProcessExtendsVisitor.prototype = { } } return matches; - }, - isElementValuesEqual: function(elementValue1, elementValue2) { + } + + isElementValuesEqual(elementValue1, elementValue2) { if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') { return elementValue1 === elementValue2; } @@ -352,7 +390,7 @@ ProcessExtendsVisitor.prototype = { if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) { return false; } - for (var i = 0; i < elementValue1.elements.length; i++) { + for (let i = 0; i < elementValue1.elements.length; i++) { if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) { if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) { return false; @@ -365,19 +403,20 @@ ProcessExtendsVisitor.prototype = { return true; } return false; - }, - extendSelector:function (matches, selectorPath, replacementSelector, isVisible) { + } + extendSelector(matches, selectorPath, replacementSelector, isVisible) { // for a set of matches, replace each match with the replacement selector - var currentSelectorPathIndex = 0, - currentSelectorPathElementIndex = 0, - path = [], - matchIndex, - selector, - firstElement, - match, - newElements; + let currentSelectorPathIndex = 0; + + let currentSelectorPathElementIndex = 0; + let path = []; + let matchIndex; + let selector; + let firstElement; + let match; + let newElements; for (matchIndex = 0; matchIndex < matches.length; matchIndex++) { match = matches[matchIndex]; @@ -427,9 +466,9 @@ ProcessExtendsVisitor.prototype = { } path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length)); - path = path.map(function (currentValue) { + path = path.map(currentValue => { // we can re-use elements here, because the visibility property matters only for selectors - var derived = currentValue.createDerived(currentValue.elements); + const derived = currentValue.createDerived(currentValue.elements); if (isVisible) { derived.ensureVisibility(); } else { @@ -438,25 +477,29 @@ ProcessExtendsVisitor.prototype = { return derived; }); return path; - }, - visitMedia: function (mediaNode, visitArgs) { - var newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); + } + + visitMedia(mediaNode, visitArgs) { + let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends)); this.allExtendsStack.push(newAllExtends); - }, - visitMediaOut: function (mediaNode) { - var lastIndex = this.allExtendsStack.length - 1; + } + + visitMediaOut(mediaNode) { + const lastIndex = this.allExtendsStack.length - 1; this.allExtendsStack.length = lastIndex; - }, - visitAtRule: function (atRuleNode, visitArgs) { - var newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); + } + + visitAtRule(atRuleNode, visitArgs) { + let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends)); this.allExtendsStack.push(newAllExtends); - }, - visitAtRuleOut: function (atRuleNode) { - var lastIndex = this.allExtendsStack.length - 1; + } + + visitAtRuleOut(atRuleNode) { + const lastIndex = this.allExtendsStack.length - 1; this.allExtendsStack.length = lastIndex; } -}; +} -module.exports = ProcessExtendsVisitor; +export default ProcessExtendsVisitor; diff --git a/lib/less/visitors/import-sequencer.js b/lib/less/visitors/import-sequencer.js index dcebf8e72..b21f628b4 100644 --- a/lib/less/visitors/import-sequencer.js +++ b/lib/less/visitors/import-sequencer.js @@ -1,54 +1,58 @@ -function ImportSequencer(onSequencerEmpty) { - this.imports = []; - this.variableImports = []; - this._onSequencerEmpty = onSequencerEmpty; - this._currentDepth = 0; -} +class ImportSequencer { + constructor(onSequencerEmpty) { + this.imports = []; + this.variableImports = []; + this._onSequencerEmpty = onSequencerEmpty; + this._currentDepth = 0; + } + + addImport(callback) { + const importSequencer = this; -ImportSequencer.prototype.addImport = function(callback) { - var importSequencer = this, - importItem = { - callback: callback, + const importItem = { + callback, args: null, isReady: false }; - this.imports.push(importItem); - return function() { - importItem.args = Array.prototype.slice.call(arguments, 0); - importItem.isReady = true; - importSequencer.tryRun(); - }; -}; -ImportSequencer.prototype.addVariableImport = function(callback) { - this.variableImports.push(callback); -}; + this.imports.push(importItem); + return function(...args) { + importItem.args = Array.prototype.slice.call(args, 0); + importItem.isReady = true; + importSequencer.tryRun(); + }; + } + + addVariableImport(callback) { + this.variableImports.push(callback); + } -ImportSequencer.prototype.tryRun = function() { - this._currentDepth++; - try { - while (true) { - while (this.imports.length > 0) { - var importItem = this.imports[0]; - if (!importItem.isReady) { - return; + tryRun() { + this._currentDepth++; + try { + while (true) { + while (this.imports.length > 0) { + const importItem = this.imports[0]; + if (!importItem.isReady) { + return; + } + this.imports = this.imports.slice(1); + importItem.callback.apply(null, importItem.args); } - this.imports = this.imports.slice(1); - importItem.callback.apply(null, importItem.args); - } - if (this.variableImports.length === 0) { - break; + if (this.variableImports.length === 0) { + break; + } + const variableImport = this.variableImports[0]; + this.variableImports = this.variableImports.slice(1); + variableImport(); } - var variableImport = this.variableImports[0]; - this.variableImports = this.variableImports.slice(1); - variableImport(); + } finally { + this._currentDepth--; + } + if (this._currentDepth === 0 && this._onSequencerEmpty) { + this._onSequencerEmpty(); } - } finally { - this._currentDepth--; - } - if (this._currentDepth === 0 && this._onSequencerEmpty) { - this._onSequencerEmpty(); } -}; +} -module.exports = ImportSequencer; +export default ImportSequencer; diff --git a/lib/less/visitors/import-visitor.js b/lib/less/visitors/import-visitor.js index 25cc68108..8d2405a6e 100644 --- a/lib/less/visitors/import-visitor.js +++ b/lib/less/visitors/import-visitor.js @@ -1,9 +1,9 @@ -var contexts = require('../contexts'), - Visitor = require('./visitor'), - ImportSequencer = require('./import-sequencer'), - utils = require('../utils'); +import contexts from '../contexts'; +import Visitor from './visitor'; +import ImportSequencer from './import-sequencer'; +import utils from '../utils'; -var ImportVisitor = function(importer, finish) { +const ImportVisitor = function(importer, finish) { this._visitor = new Visitor(this); this._importer = importer; @@ -36,12 +36,12 @@ ImportVisitor.prototype = { this._finish(this.error); }, visitImport: function (importNode, visitArgs) { - var inlineCSS = importNode.options.inline; + const inlineCSS = importNode.options.inline; if (!importNode.css || inlineCSS) { - var context = new contexts.Eval(this.context, utils.copyArray(this.context.frames)); - var importParent = context.frames[0]; + const context = new contexts.Eval(this.context, utils.copyArray(this.context.frames)); + const importParent = context.frames[0]; this.importCount++; if (importNode.isVariableImport()) { @@ -53,8 +53,8 @@ ImportVisitor.prototype = { visitArgs.visitDeeper = false; }, processImportNode: function(importNode, context, importParent) { - var evaldImportNode, - inlineCSS = importNode.options.inline; + let evaldImportNode; + const inlineCSS = importNode.options.inline; try { evaldImportNode = importNode.evalForImport(context); @@ -67,23 +67,22 @@ ImportVisitor.prototype = { } if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) { - if (evaldImportNode.options.multiple) { context.importMultiple = true; } // try appending if we haven't determined if it is css or not - var tryAppendLessExtension = evaldImportNode.css === undefined; + const tryAppendLessExtension = evaldImportNode.css === undefined; - for (var i = 0; i < importParent.rules.length; i++) { + for (let i = 0; i < importParent.rules.length; i++) { if (importParent.rules[i] === importNode) { importParent.rules[i] = evaldImportNode; break; } } - var onImported = this.onImported.bind(this, evaldImportNode, context), - sequencedOnImported = this._sequencer.addImport(onImported); + const onImported = this.onImported.bind(this, evaldImportNode, context); + const sequencedOnImported = this._sequencer.addImport(onImported); this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(), evaldImportNode.options, sequencedOnImported); @@ -102,17 +101,17 @@ ImportVisitor.prototype = { this.error = e; } - var importVisitor = this, - inlineCSS = importNode.options.inline, - isPlugin = importNode.options.isPlugin, - isOptional = importNode.options.optional, - duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector; + const importVisitor = this; + const inlineCSS = importNode.options.inline; + const isPlugin = importNode.options.isPlugin; + const isOptional = importNode.options.optional; + const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector; if (!context.importMultiple) { if (duplicateImport) { importNode.skip = true; } else { - importNode.skip = function() { + importNode.skip = () => { if (fullPath in importVisitor.onceFileDetectionMap) { return true; } @@ -133,7 +132,7 @@ ImportVisitor.prototype = { if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) { importVisitor.recursionDetector[fullPath] = true; - var oldContext = this.context; + const oldContext = this.context; this.context = context; try { this._visitor.visit(root); @@ -187,4 +186,4 @@ ImportVisitor.prototype = { this.context.frames.shift(); } }; -module.exports = ImportVisitor; +export default ImportVisitor; diff --git a/lib/less/visitors/index.js b/lib/less/visitors/index.js index 2176e49c5..722725af0 100644 --- a/lib/less/visitors/index.js +++ b/lib/less/visitors/index.js @@ -1,4 +1,4 @@ -var visitors = { +const visitors = { Visitor: require('./visitor'), ImportVisitor: require('./import-visitor'), MarkVisibleSelectorsVisitor: require('./set-tree-visibility-visitor'), @@ -7,4 +7,4 @@ var visitors = { ToCSSVisitor: require('./to-css-visitor') }; -module.exports = visitors; +export default visitors; diff --git a/lib/less/visitors/join-selector-visitor.js b/lib/less/visitors/join-selector-visitor.js index 1ea830524..d042ee3d0 100644 --- a/lib/less/visitors/join-selector-visitor.js +++ b/lib/less/visitors/join-selector-visitor.js @@ -1,51 +1,57 @@ -var Visitor = require('./visitor'); +import Visitor from './visitor'; -var JoinSelectorVisitor = function() { - this.contexts = [[]]; - this._visitor = new Visitor(this); -}; +class JoinSelectorVisitor { + constructor() { + this.contexts = [[]]; + this._visitor = new Visitor(this); + } -JoinSelectorVisitor.prototype = { - run: function (root) { + run(root) { return this._visitor.visit(root); - }, - visitDeclaration: function (declNode, visitArgs) { + } + + visitDeclaration(declNode, visitArgs) { visitArgs.visitDeeper = false; - }, - visitMixinDefinition: function (mixinDefinitionNode, visitArgs) { + } + + visitMixinDefinition(mixinDefinitionNode, visitArgs) { visitArgs.visitDeeper = false; - }, + } - visitRuleset: function (rulesetNode, visitArgs) { - var context = this.contexts[this.contexts.length - 1], - paths = [], selectors; + visitRuleset(rulesetNode, visitArgs) { + const context = this.contexts[this.contexts.length - 1]; + const paths = []; + let selectors; this.contexts.push(paths); if (!rulesetNode.root) { selectors = rulesetNode.selectors; if (selectors) { - selectors = selectors.filter(function(selector) { return selector.getIsOutput(); }); + selectors = selectors.filter(selector => selector.getIsOutput()); rulesetNode.selectors = selectors.length ? selectors : (selectors = null); if (selectors) { rulesetNode.joinSelectors(paths, context, selectors); } } if (!selectors) { rulesetNode.rules = null; } rulesetNode.paths = paths; } - }, - visitRulesetOut: function (rulesetNode) { + } + + visitRulesetOut(rulesetNode) { this.contexts.length = this.contexts.length - 1; - }, - visitMedia: function (mediaNode, visitArgs) { - var context = this.contexts[this.contexts.length - 1]; + } + + visitMedia(mediaNode, visitArgs) { + const context = this.contexts[this.contexts.length - 1]; mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia); - }, - visitAtRule: function (atRuleNode, visitArgs) { - var context = this.contexts[this.contexts.length - 1]; + } + + visitAtRule(atRuleNode, visitArgs) { + const context = this.contexts[this.contexts.length - 1]; if (atRuleNode.rules && atRuleNode.rules.length) { atRuleNode.rules[0].root = (atRuleNode.isRooted || context.length === 0 || null); } } -}; +} -module.exports = JoinSelectorVisitor; +export default JoinSelectorVisitor; diff --git a/lib/less/visitors/set-tree-visibility-visitor.js b/lib/less/visitors/set-tree-visibility-visitor.js index 0f9c9e736..3a713e0ae 100644 --- a/lib/less/visitors/set-tree-visibility-visitor.js +++ b/lib/less/visitors/set-tree-visibility-visitor.js @@ -1,38 +1,45 @@ -var SetTreeVisibilityVisitor = function(visible) { - this.visible = visible; -}; -SetTreeVisibilityVisitor.prototype.run = function(root) { - this.visit(root); -}; -SetTreeVisibilityVisitor.prototype.visitArray = function(nodes) { - if (!nodes) { - return nodes; +class SetTreeVisibilityVisitor { + constructor(visible) { + this.visible = visible; } - var cnt = nodes.length, i; - for (i = 0; i < cnt; i++) { - this.visit(nodes[i]); - } - return nodes; -}; -SetTreeVisibilityVisitor.prototype.visit = function(node) { - if (!node) { - return node; + run(root) { + this.visit(root); } - if (node.constructor === Array) { - return this.visitArray(node); + + visitArray(nodes) { + if (!nodes) { + return nodes; + } + + const cnt = nodes.length; + let i; + for (i = 0; i < cnt; i++) { + this.visit(nodes[i]); + } + return nodes; } - if (!node.blocksVisibility || node.blocksVisibility()) { + visit(node) { + if (!node) { + return node; + } + if (node.constructor === Array) { + return this.visitArray(node); + } + + if (!node.blocksVisibility || node.blocksVisibility()) { + return node; + } + if (this.visible) { + node.ensureVisibility(); + } else { + node.ensureInvisibility(); + } + + node.accept(this); return node; } - if (this.visible) { - node.ensureVisibility(); - } else { - node.ensureInvisibility(); - } +} - node.accept(this); - return node; -}; -module.exports = SetTreeVisibilityVisitor; \ No newline at end of file +export default SetTreeVisibilityVisitor; \ No newline at end of file diff --git a/lib/less/visitors/to-css-visitor.js b/lib/less/visitors/to-css-visitor.js index 6b6d3f1c9..0761b4675 100644 --- a/lib/less/visitors/to-css-visitor.js +++ b/lib/less/visitors/to-css-visitor.js @@ -1,18 +1,18 @@ -var tree = require('../tree'), - Visitor = require('./visitor'); +import tree from '../tree'; +import Visitor from './visitor'; -var CSSVisitorUtils = function(context) { - this._visitor = new Visitor(this); - this._context = context; -}; +class CSSVisitorUtils { + constructor(context) { + this._visitor = new Visitor(this); + this._context = context; + } -CSSVisitorUtils.prototype = { - containsSilentNonBlockedChild: function(bodyRules) { - var rule; + containsSilentNonBlockedChild(bodyRules) { + let rule; if (!bodyRules) { return false; } - for (var r = 0; r < bodyRules.length; r++) { + for (let r = 0; r < bodyRules.length; r++) { rule = bodyRules[r]; if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) { // the atrule contains something that was referenced (likely by extend) @@ -21,27 +21,25 @@ CSSVisitorUtils.prototype = { } } return false; - }, + } - keepOnlyVisibleChilds: function(owner) { + keepOnlyVisibleChilds(owner) { if (owner && owner.rules) { - owner.rules = owner.rules.filter(function(thing) { - return thing.isVisible(); - }); + owner.rules = owner.rules.filter(thing => thing.isVisible()); } - }, + } - isEmpty: function(owner) { + isEmpty(owner) { return (owner && owner.rules) ? (owner.rules.length === 0) : true; - }, + } - hasVisibleSelector: function(rulesetNode) { + hasVisibleSelector(rulesetNode) { return (rulesetNode && rulesetNode.paths) ? (rulesetNode.paths.length > 0) : false; - }, + } - resolveVisibility: function (node, originalRules) { + resolveVisibility(node, originalRules) { if (!node.blocksVisibility()) { if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) { return ; @@ -50,7 +48,7 @@ CSSVisitorUtils.prototype = { return node; } - var compiledRulesBody = node.rules[0]; + const compiledRulesBody = node.rules[0]; this.keepOnlyVisibleChilds(compiledRulesBody); if (this.isEmpty(compiledRulesBody)) { @@ -61,9 +59,9 @@ CSSVisitorUtils.prototype = { node.removeVisibilityBlock(); return node; - }, + } - isVisibleRuleset: function(rulesetNode) { + isVisibleRuleset(rulesetNode) { if (rulesetNode.firstRoot) { return true; } @@ -78,10 +76,9 @@ CSSVisitorUtils.prototype = { return true; } +} -}; - -var ToCSSVisitor = function(context) { +const ToCSSVisitor = function(context) { this._visitor = new Visitor(this); this._context = context; this.utils = new CSSVisitorUtils(context); @@ -117,7 +114,7 @@ ToCSSVisitor.prototype = { }, visitMedia: function(mediaNode, visitArgs) { - var originalRules = mediaNode.rules[0].rules; + const originalRules = mediaNode.rules[0].rules; mediaNode.accept(this._visitor); visitArgs.visitDeeper = false; @@ -150,11 +147,11 @@ ToCSSVisitor.prototype = { // if there is only one nested ruleset and that one has no path, then it is // just fake ruleset function hasFakeRuleset(atRuleNode) { - var bodyRules = atRuleNode.rules; + const bodyRules = atRuleNode.rules; return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0); } function getBodyRules(atRuleNode) { - var nodeRules = atRuleNode.rules; + const nodeRules = atRuleNode.rules; if (hasFakeRuleset(atRuleNode)) { return nodeRules[0].rules; } @@ -164,7 +161,7 @@ ToCSSVisitor.prototype = { // it is still true that it is only one ruleset in array // this is last such moment // process childs - var originalRules = getBodyRules(atRuleNode); + const originalRules = getBodyRules(atRuleNode); atRuleNode.accept(this._visitor); visitArgs.visitDeeper = false; @@ -186,7 +183,7 @@ ToCSSVisitor.prototype = { // be considered illegal css as it has to be on the first line if (this.charset) { if (atRuleNode.debugInfo) { - var comment = new tree.Comment('/* ' + atRuleNode.toCSS(this._context).replace(/\n/g, '') + ' */\n'); + const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\n/g, '')} */\n`); comment.debugInfo = atRuleNode.debugInfo; return this._visitor.visit(comment); } @@ -203,18 +200,18 @@ ToCSSVisitor.prototype = { return; } - for (var i = 0; i < rules.length; i++) { - var ruleNode = rules[i]; + for (let i = 0; i < rules.length; i++) { + const ruleNode = rules[i]; if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) { throw { message: 'Properties must be inside selector blocks. They cannot be in the root', index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename}; } if (ruleNode instanceof tree.Call) { - throw { message: 'Function \'' + ruleNode.name + '\' is undefined', + throw { message: `Function '${ruleNode.name}' is undefined`, index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename}; } if (ruleNode.type && !ruleNode.allowRoot) { - throw { message: ruleNode.type + ' node returned by a function is not valid here', + throw { message: `${ruleNode.type} node returned by a function is not valid here`, index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename}; } } @@ -222,7 +219,9 @@ ToCSSVisitor.prototype = { visitRuleset: function (rulesetNode, visitArgs) { // at this point rulesets are nested into each other - var rule, rulesets = []; + let rule; + + const rulesets = []; this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot); @@ -231,8 +230,10 @@ ToCSSVisitor.prototype = { this._compileRulesetPaths(rulesetNode); // remove rulesets from this ruleset body and compile them separately - var nodeRules = rulesetNode.rules, nodeRuleCnt = nodeRules ? nodeRules.length : 0; - for (var i = 0; i < nodeRuleCnt; ) { + const nodeRules = rulesetNode.rules; + + let nodeRuleCnt = nodeRules ? nodeRules.length : 0; + for (let i = 0; i < nodeRuleCnt; ) { rule = nodeRules[i]; if (rule && rule.rules) { // visit because we are moving them out from being a child @@ -252,7 +253,6 @@ ToCSSVisitor.prototype = { rulesetNode.rules = null; } visitArgs.visitDeeper = false; - } else { // if (! rulesetNode.root) { rulesetNode.accept(this._visitor); visitArgs.visitDeeper = false; @@ -278,8 +278,8 @@ ToCSSVisitor.prototype = { _compileRulesetPaths: function(rulesetNode) { if (rulesetNode.paths) { rulesetNode.paths = rulesetNode.paths - .filter(function(p) { - var i; + .filter(p => { + let i; if (p[0].elements[0].combinator.value === ' ') { p[0].elements[0].combinator = new(tree.Combinator)(''); } @@ -297,8 +297,11 @@ ToCSSVisitor.prototype = { if (!rules) { return; } // remove duplicates - var ruleCache = {}, - ruleList, rule, i; + const ruleCache = {}; + + let ruleList; + let rule; + let i; for (i = rules.length - 1; i >= 0 ; i--) { rule = rules[i]; @@ -310,7 +313,7 @@ ToCSSVisitor.prototype = { if (ruleList instanceof tree.Declaration) { ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)]; } - var ruleCSS = rule.toCSS(this._context); + const ruleCSS = rule.toCSS(this._context); if (ruleList.indexOf(ruleCSS) !== -1) { rules.splice(i, 1); } else { @@ -326,25 +329,25 @@ ToCSSVisitor.prototype = { return; } - var groups = {}, - groupsArr = []; - - for (var i = 0; i < rules.length; i++) { - var rule = rules[i]; + const groups = {}; + const groupsArr = []; + + for (let i = 0; i < rules.length; i++) { + const rule = rules[i]; if (rule.merge) { - var key = rule.name; + const key = rule.name; groups[key] ? rules.splice(i--, 1) : groupsArr.push(groups[key] = []); groups[key].push(rule); } } - groupsArr.forEach(function(group) { + groupsArr.forEach(group => { if (group.length > 0) { - var result = group[0], - space = [], - comma = [new tree.Expression(space)]; - group.forEach(function(rule) { + const result = group[0]; + let space = []; + const comma = [new tree.Expression(space)]; + group.forEach(rule => { if ((rule.merge === '+') && (space.length > 0)) { comma.push(new tree.Expression(space = [])); } @@ -357,4 +360,4 @@ ToCSSVisitor.prototype = { } }; -module.exports = ToCSSVisitor; +export default ToCSSVisitor; diff --git a/lib/less/visitors/visitor.js b/lib/less/visitors/visitor.js index e857eb283..235ce85e9 100644 --- a/lib/less/visitors/visitor.js +++ b/lib/less/visitors/visitor.js @@ -1,7 +1,6 @@ -var tree = require('../tree'); - -var _visitArgs = { visitDeeper: true }, - _hasIndexed = false; +import tree from '../tree'; +const _visitArgs = { visitDeeper: true }; +let _hasIndexed = false; function _noop(node) { return node; @@ -9,7 +8,9 @@ function _noop(node) { function indexNodeTypes(parent, ticker) { // add .typeIndex to tree node types for lookup table - var key, child; + let key; + + let child; for (key in parent) { /* eslint guard-for-in: 0 */ child = parent[key]; @@ -30,24 +31,24 @@ function indexNodeTypes(parent, ticker) { return ticker; } -var Visitor = function(implementation) { - this._implementation = implementation; - this._visitInCache = {}; - this._visitOutCache = {}; +class Visitor { + constructor(implementation) { + this._implementation = implementation; + this._visitInCache = {}; + this._visitOutCache = {}; - if (!_hasIndexed) { - indexNodeTypes(tree, 1); - _hasIndexed = true; + if (!_hasIndexed) { + indexNodeTypes(tree, 1); + _hasIndexed = true; + } } -}; -Visitor.prototype = { - visit: function(node) { + visit(node) { if (!node) { return node; } - var nodeTypeIndex = node.typeIndex; + const nodeTypeIndex = node.typeIndex; if (!nodeTypeIndex) { // MixinCall args aren't a node type? if (node.value && node.value.typeIndex) { @@ -56,24 +57,24 @@ Visitor.prototype = { return node; } - var impl = this._implementation, - func = this._visitInCache[nodeTypeIndex], - funcOut = this._visitOutCache[nodeTypeIndex], - visitArgs = _visitArgs, - fnName; + const impl = this._implementation; + let func = this._visitInCache[nodeTypeIndex]; + let funcOut = this._visitOutCache[nodeTypeIndex]; + const visitArgs = _visitArgs; + let fnName; visitArgs.visitDeeper = true; if (!func) { - fnName = 'visit' + node.type; + fnName = `visit${node.type}`; func = impl[fnName] || _noop; - funcOut = impl[fnName + 'Out'] || _noop; + funcOut = impl[`${fnName}Out`] || _noop; this._visitInCache[nodeTypeIndex] = func; this._visitOutCache[nodeTypeIndex] = funcOut; } if (func !== _noop) { - var newNode = func.call(impl, node, visitArgs); + const newNode = func.call(impl, node, visitArgs); if (node && impl.isReplacing) { node = newNode; } @@ -88,13 +89,15 @@ Visitor.prototype = { } return node; - }, - visitArray: function(nodes, nonReplacing) { + } + + visitArray(nodes, nonReplacing) { if (!nodes) { return nodes; } - var cnt = nodes.length, i; + const cnt = nodes.length; + let i; // Non-replacing if (nonReplacing || !this._implementation.isReplacing) { @@ -105,9 +108,9 @@ Visitor.prototype = { } // Replacing - var out = []; + const out = []; for (i = 0; i < cnt; i++) { - var evald = this.visit(nodes[i]); + const evald = this.visit(nodes[i]); if (evald === undefined) { continue; } if (!evald.splice) { out.push(evald); @@ -116,14 +119,19 @@ Visitor.prototype = { } } return out; - }, - flatten: function(arr, out) { + } + + flatten(arr, out) { if (!out) { out = []; } - var cnt, i, item, - nestedCnt, j, nestedItem; + let cnt; + let i; + let item; + let nestedCnt; + let j; + let nestedItem; for (i = 0, cnt = arr.length; i < cnt; i++) { item = arr[i]; @@ -150,5 +158,6 @@ Visitor.prototype = { return out; } -}; -module.exports = Visitor; +} + +export default Visitor; diff --git a/package.json b/package.json index 6ead4b22f..73638d3cb 100644 --- a/package.json +++ b/package.json @@ -51,6 +51,9 @@ "source-map": "~0.6.0" }, "devDependencies": { + "@babel/core": "^7.5.5", + "@typescript-eslint/eslint-plugin": "^1.13.0", + "@typescript-eslint/parser": "^1.13.0", "bootstrap-less-port": "0.3.0", "diff": "^3.2.0", "git-rev": "^0.2.1", @@ -63,10 +66,12 @@ "grunt-contrib-jasmine": "^1.2.0", "grunt-contrib-uglify": "^1.0.1", "grunt-eslint": "^19.0.0", + "grunt-rollup": "^10.0.0", "grunt-saucelabs": "^9.0.0", "grunt-shell": "^1.3.0", "import-module": "file:test/import-module", "jit-grunt": "^0.10.0", + "lebab": "^3.1.0", "less-plugin-autoprefix": "^1.5.1", "less-plugin-clean-css": "^1.5.1", "performance-now": "^0.2.0", @@ -74,6 +79,9 @@ "phantomjs-prebuilt": "^2.1.16", "phin": "^2.2.3", "promise": "^7.1.1", + "read-glob": "^3.0.0", + "rollup": "^1.17.0", + "rollup-plugin-babel": "^4.3.3", "time-grunt": "^1.3.0", "uikit": "2.27.4" }, From 417c466c039d56db62bed5f80b099b39e8229ecd Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Wed, 31 Jul 2019 12:17:02 -0700 Subject: [PATCH 02/17] WIP browser rollup working --- .babelrc | 5 + build/rollup.js | 63 + dist/less.js | 24399 +++++++++++++------------ dist/less.js.map | 1 + lib/less-browser/bootstrap.js | 14 +- lib/less-browser/browser.js | 2 +- lib/less-browser/error-reporting.js | 2 +- lib/less-browser/image-size.js | 4 +- lib/less-browser/index.js | 22 +- lib/less-browser/utils.js | 40 +- lib/less-node/environment.js | 9 +- lib/less-node/file-manager.js | 3 +- lib/less-node/image-size.js | 7 +- lib/less-node/index.js | 16 +- lib/less-node/plugin-loader.js | 3 +- lib/less-node/url-file-manager.js | 6 +- lib/less/constants.js | 24 +- lib/less/contexts.js | 2 +- lib/less/data/index.js | 8 +- lib/less/functions/boolean.js | 20 +- lib/less/functions/color-blending.js | 3 +- lib/less/functions/color.js | 4 +- lib/less/functions/data-uri.js | 29 +- lib/less/functions/default.js | 5 +- lib/less/functions/index.js | 42 +- lib/less/functions/list.js | 5 +- lib/less/functions/math-helper.js | 5 +- lib/less/functions/math.js | 7 +- lib/less/functions/number.js | 8 +- lib/less/functions/string.js | 5 +- lib/less/functions/svg.js | 17 +- lib/less/functions/types.js | 7 +- lib/less/import-manager.js | 3 +- lib/less/index.js | 76 +- lib/less/less-error.js | 6 +- lib/less/parse.js | 7 +- lib/less/parser/parser.js | 2 +- lib/less/render.js | 7 +- lib/less/tree/declaration.js | 4 +- lib/less/tree/detached-ruleset.js | 2 +- lib/less/tree/expression.js | 3 +- lib/less/tree/import.js | 2 +- lib/less/tree/index.js | 90 +- lib/less/tree/media.js | 2 +- lib/less/tree/mixin-definition.js | 2 +- lib/less/tree/operation.js | 4 +- lib/less/tree/ruleset.js | 2 +- lib/less/tree/unit.js | 2 +- lib/less/utils.js | 211 +- lib/less/visitors/extend-visitor.js | 2 +- lib/less/visitors/import-visitor.js | 2 +- lib/less/visitors/index.js | 23 +- package.json | 3 + 53 files changed, 13280 insertions(+), 11962 deletions(-) create mode 100644 .babelrc create mode 100644 build/rollup.js create mode 100644 dist/less.js.map diff --git a/.babelrc b/.babelrc new file mode 100644 index 000000000..60cad8d15 --- /dev/null +++ b/.babelrc @@ -0,0 +1,5 @@ +{ + "presets": [ + ["@babel/env", {"modules": false}] + ] +} \ No newline at end of file diff --git a/build/rollup.js b/build/rollup.js new file mode 100644 index 000000000..aac34e222 --- /dev/null +++ b/build/rollup.js @@ -0,0 +1,63 @@ +const rollup = require('rollup'); +const babel = require('rollup-plugin-babel'); +const resolve = require('rollup-plugin-node-resolve'); +const commonjs = require('rollup-plugin-commonjs'); + +async function buildBrowser() { + let bundle; + try { + bundle = await rollup.rollup({ + input: './lib/less-browser/bootstrap.js', + plugins: [ + resolve(), + commonjs(), + babel({ + exclude: 'node_modules/**' // only transpile our source code + }) + ] + }); + } + catch (e) { + console.log(e); + return; + } + + await bundle.write({ + file: './dist/less.js', + format: 'umd', + name: 'less', + sourcemap: true + }); +} + +async function buildNode() { + let bundle; + try { + bundle = await rollup.rollup({ + input: './lib/less-node/index.js', + plugins: [ + resolve(), + commonjs(), + babel({ + exclude: 'node_modules/**' // only transpile our source code + }) + ] + }); + } + catch (e) { + console.log(e); + return; + } + + await bundle.write({ + file: './dist/less.cjs.js', + format: 'cjs' + }); +} + +async function build() { + // await buildBrowser(); + await buildNode(); +} + +build(); \ No newline at end of file diff --git a/dist/less.js b/dist/less.js index 83267e652..35f8899c5 100644 --- a/dist/less.js +++ b/dist/less.js @@ -1,12956 +1,14169 @@ -/*! - * Less - Leaner CSS v3.9.0 - * http://lesscss.org - * - * Copyright (c) 2009-2018, Alexis Sellier - * Licensed under the Apache-2.0 License. - * - */ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : + typeof define === 'function' && define.amd ? define(factory) : + (global = global || self, global.less = factory()); +}(this, function () { 'use strict'; + + // Export a new default each time + var defaultOptions = (function () { + return { + /* Inline Javascript - @plugin still allowed */ + javascriptEnabled: false, + + /* Outputs a makefile import dependency list to stdout. */ + depends: false, + + /* (DEPRECATED) Compress using less built-in compression. + * This does an okay job but does not utilise all the tricks of + * dedicated css compression. */ + compress: false, + + /* Runs the less parser and just reports errors without any output. */ + lint: false, + + /* Sets available include paths. + * If the file in an @import rule does not exist at that exact location, + * less will look for it at the location(s) passed to this option. + * You might use this for instance to specify a path to a library which + * you want to be referenced simply and relatively in the less files. */ + paths: [], + + /* color output in the terminal */ + color: true, + + /* The strictImports controls whether the compiler will allow an @import inside of either + * @media blocks or (a later addition) other selector blocks. + * See: https://github.com/less/less.js/issues/656 */ + strictImports: false, + + /* Allow Imports from Insecure HTTPS Hosts */ + insecure: false, + + /* Allows you to add a path to every generated import and url in your css. + * This does not affect less import statements that are processed, just ones + * that are left in the output css. */ + rootpath: '', + + /* By default URLs are kept as-is, so if you import a file in a sub-directory + * that references an image, exactly the same URL will be output in the css. + * This option allows you to re-write URL's in imported files so that the + * URL is always relative to the base imported file */ + rewriteUrls: false, + + /* Compatibility with IE8. Used for limiting data-uri length */ + // true until 3.0 + ieCompat: false, + + /* How to process math + * 0 always - eagerly try to solve all operations + * 1 parens-division - require parens for division "/" + * 2 parens | strict - require parens for all operations + * 3 strict-legacy - legacy strict behavior (super-strict) + */ + math: 0, + + /* Without this option, less attempts to guess at the output unit when it does maths. */ + strictUnits: false, + + /* Effectively the declaration is put at the top of your base Less file, + * meaning it can be used but it also can be overridden if this variable + * is defined in the file. */ + globalVars: null, + + /* As opposed to the global variable option, this puts the declaration at the + * end of your base file, meaning it will override anything defined in your Less file. */ + modifyVars: null, + + /* This option allows you to specify a argument to go on to every URL. */ + urlArgs: '' + }; + }); + + function extractId(href) { + return href.replace(/^[a-z-]+:\/+?[^\/]+/, '') // Remove protocol & domain + .replace(/[\?\&]livereload=\w+/, '') // Remove LiveReload cachebuster + .replace(/^\//, '') // Remove root / + .replace(/\.[a-zA-Z]+$/, '') // Remove simple extension + .replace(/[^\.\w-]+/g, '-') // Replace illegal characters + .replace(/\./g, ':'); // Replace dots with colons(for valid id) + } + function addDataAttr(options, tag) { + for (var opt in tag.dataset) { + if (tag.dataset.hasOwnProperty(opt)) { + if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') { + options[opt] = tag.dataset[opt]; + } else { + try { + options[opt] = JSON.parse(tag.dataset[opt]); + } catch (_) {} + } + } + } + } + + var browser = { + createCSS: function createCSS(document, styles, sheet) { + // Strip the query-string + var href = sheet.href || ''; // If there is no title set, use the filename, minus the extension + + var id = "less:".concat(sheet.title || extractId(href)); // If this has already been inserted into the DOM, we may need to replace it + + var oldStyleNode = document.getElementById(id); + var keepOldStyleNode = false; // Create a new stylesheet node for insertion or (if necessary) replacement + + var styleNode = document.createElement('style'); + styleNode.setAttribute('type', 'text/css'); + + if (sheet.media) { + styleNode.setAttribute('media', sheet.media); + } - /** * @license Apache-2.0 - */ + styleNode.id = id; -(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.less = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o 0 && styleNode.childNodes.length > 0 && oldStyleNode.firstChild.nodeValue === styleNode.firstChild.nodeValue; + } + + var head = document.getElementsByTagName('head')[0]; // If there is no oldStyleNode, just append; otherwise, only append if we need + // to replace oldStyleNode with an updated stylesheet + + if (oldStyleNode === null || keepOldStyleNode === false) { + var nextEl = sheet && sheet.nextSibling || null; + + if (nextEl) { + nextEl.parentNode.insertBefore(styleNode, nextEl); + } else { + head.appendChild(styleNode); + } + } + + if (oldStyleNode && keepOldStyleNode === false) { + oldStyleNode.parentNode.removeChild(oldStyleNode); + } // For IE. + // This needs to happen *after* the style element is added to the DOM, otherwise IE 7 and 8 may crash. + // See http://social.msdn.microsoft.com/Forums/en-US/7e081b65-878a-4c22-8e68-c10d39c2ed32/internet-explorer-crashes-appending-style-element-to-head + + + if (styleNode.styleSheet) { + try { + styleNode.styleSheet.cssText = styles; + } catch (e) { + throw new Error('Couldn\'t reassign styleSheet.cssText.'); + } + } + }, + currentScript: function currentScript(window) { + var document = window.document; + return document.currentScript || function () { + var scripts = document.getElementsByTagName('script'); + return scripts[scripts.length - 1]; + }(); + } + }; + var addDefaultOptions = (function (window, options) { // use options from the current script tag data attribues addDataAttr(options, browser.currentScript(window)); if (options.isFileProtocol === undefined) { - options.isFileProtocol = /^(file|(chrome|safari)(-extension)?|resource|qrc|app):/.test(window.location.protocol); - } - - // Load styles asynchronously (default: false) + options.isFileProtocol = /^(file|(chrome|safari)(-extension)?|resource|qrc|app):/.test(window.location.protocol); + } // Load styles asynchronously (default: false) // // This is set to `false` by default, so that the body // doesn't start loading before the stylesheets are parsed. // Setting this to `true` can result in flickering. // - options.async = options.async || false; - options.fileAsync = options.fileAsync || false; - // Interval between watch polls - options.poll = options.poll || (options.isFileProtocol ? 1000 : 1500); - options.env = options.env || (window.location.hostname == '127.0.0.1' || - window.location.hostname == '0.0.0.0' || - window.location.hostname == 'localhost' || - (window.location.port && - window.location.port.length > 0) || - options.isFileProtocol ? 'development' - : 'production'); + options.async = options.async || false; + options.fileAsync = options.fileAsync || false; // Interval between watch polls + options.poll = options.poll || (options.isFileProtocol ? 1000 : 1500); + options.env = options.env || (window.location.hostname == '127.0.0.1' || window.location.hostname == '0.0.0.0' || window.location.hostname == 'localhost' || window.location.port && window.location.port.length > 0 || options.isFileProtocol ? 'development' : 'production'); var dumpLineNumbers = /!dumpLineNumbers:(comments|mediaquery|all)/.exec(window.location.hash); + if (dumpLineNumbers) { - options.dumpLineNumbers = dumpLineNumbers[1]; + options.dumpLineNumbers = dumpLineNumbers[1]; } if (options.useFileCache === undefined) { - options.useFileCache = true; + options.useFileCache = true; } if (options.onReady === undefined) { - options.onReady = true; + options.onReady = true; } if (options.relativeUrls) { - options.rewriteUrls = 'all'; + options.rewriteUrls = 'all'; } -}; - -},{"./browser":3,"./utils":11}],2:[function(require,module,exports){ -/** - * Kicks off less and compiles any stylesheets - * used in the browser distributed version of less - * to kick-start less using the browser api - */ -/* global window, document */ + }); -// TODO - consider switching this out for a recommendation for this polyfill? -// -// Browsers have good Promise support -require('promise/polyfill'); + var colors = { + 'aliceblue': '#f0f8ff', + 'antiquewhite': '#faebd7', + 'aqua': '#00ffff', + 'aquamarine': '#7fffd4', + 'azure': '#f0ffff', + 'beige': '#f5f5dc', + 'bisque': '#ffe4c4', + 'black': '#000000', + 'blanchedalmond': '#ffebcd', + 'blue': '#0000ff', + 'blueviolet': '#8a2be2', + 'brown': '#a52a2a', + 'burlywood': '#deb887', + 'cadetblue': '#5f9ea0', + 'chartreuse': '#7fff00', + 'chocolate': '#d2691e', + 'coral': '#ff7f50', + 'cornflowerblue': '#6495ed', + 'cornsilk': '#fff8dc', + 'crimson': '#dc143c', + 'cyan': '#00ffff', + 'darkblue': '#00008b', + 'darkcyan': '#008b8b', + 'darkgoldenrod': '#b8860b', + 'darkgray': '#a9a9a9', + 'darkgrey': '#a9a9a9', + 'darkgreen': '#006400', + 'darkkhaki': '#bdb76b', + 'darkmagenta': '#8b008b', + 'darkolivegreen': '#556b2f', + 'darkorange': '#ff8c00', + 'darkorchid': '#9932cc', + 'darkred': '#8b0000', + 'darksalmon': '#e9967a', + 'darkseagreen': '#8fbc8f', + 'darkslateblue': '#483d8b', + 'darkslategray': '#2f4f4f', + 'darkslategrey': '#2f4f4f', + 'darkturquoise': '#00ced1', + 'darkviolet': '#9400d3', + 'deeppink': '#ff1493', + 'deepskyblue': '#00bfff', + 'dimgray': '#696969', + 'dimgrey': '#696969', + 'dodgerblue': '#1e90ff', + 'firebrick': '#b22222', + 'floralwhite': '#fffaf0', + 'forestgreen': '#228b22', + 'fuchsia': '#ff00ff', + 'gainsboro': '#dcdcdc', + 'ghostwhite': '#f8f8ff', + 'gold': '#ffd700', + 'goldenrod': '#daa520', + 'gray': '#808080', + 'grey': '#808080', + 'green': '#008000', + 'greenyellow': '#adff2f', + 'honeydew': '#f0fff0', + 'hotpink': '#ff69b4', + 'indianred': '#cd5c5c', + 'indigo': '#4b0082', + 'ivory': '#fffff0', + 'khaki': '#f0e68c', + 'lavender': '#e6e6fa', + 'lavenderblush': '#fff0f5', + 'lawngreen': '#7cfc00', + 'lemonchiffon': '#fffacd', + 'lightblue': '#add8e6', + 'lightcoral': '#f08080', + 'lightcyan': '#e0ffff', + 'lightgoldenrodyellow': '#fafad2', + 'lightgray': '#d3d3d3', + 'lightgrey': '#d3d3d3', + 'lightgreen': '#90ee90', + 'lightpink': '#ffb6c1', + 'lightsalmon': '#ffa07a', + 'lightseagreen': '#20b2aa', + 'lightskyblue': '#87cefa', + 'lightslategray': '#778899', + 'lightslategrey': '#778899', + 'lightsteelblue': '#b0c4de', + 'lightyellow': '#ffffe0', + 'lime': '#00ff00', + 'limegreen': '#32cd32', + 'linen': '#faf0e6', + 'magenta': '#ff00ff', + 'maroon': '#800000', + 'mediumaquamarine': '#66cdaa', + 'mediumblue': '#0000cd', + 'mediumorchid': '#ba55d3', + 'mediumpurple': '#9370d8', + 'mediumseagreen': '#3cb371', + 'mediumslateblue': '#7b68ee', + 'mediumspringgreen': '#00fa9a', + 'mediumturquoise': '#48d1cc', + 'mediumvioletred': '#c71585', + 'midnightblue': '#191970', + 'mintcream': '#f5fffa', + 'mistyrose': '#ffe4e1', + 'moccasin': '#ffe4b5', + 'navajowhite': '#ffdead', + 'navy': '#000080', + 'oldlace': '#fdf5e6', + 'olive': '#808000', + 'olivedrab': '#6b8e23', + 'orange': '#ffa500', + 'orangered': '#ff4500', + 'orchid': '#da70d6', + 'palegoldenrod': '#eee8aa', + 'palegreen': '#98fb98', + 'paleturquoise': '#afeeee', + 'palevioletred': '#d87093', + 'papayawhip': '#ffefd5', + 'peachpuff': '#ffdab9', + 'peru': '#cd853f', + 'pink': '#ffc0cb', + 'plum': '#dda0dd', + 'powderblue': '#b0e0e6', + 'purple': '#800080', + 'rebeccapurple': '#663399', + 'red': '#ff0000', + 'rosybrown': '#bc8f8f', + 'royalblue': '#4169e1', + 'saddlebrown': '#8b4513', + 'salmon': '#fa8072', + 'sandybrown': '#f4a460', + 'seagreen': '#2e8b57', + 'seashell': '#fff5ee', + 'sienna': '#a0522d', + 'silver': '#c0c0c0', + 'skyblue': '#87ceeb', + 'slateblue': '#6a5acd', + 'slategray': '#708090', + 'slategrey': '#708090', + 'snow': '#fffafa', + 'springgreen': '#00ff7f', + 'steelblue': '#4682b4', + 'tan': '#d2b48c', + 'teal': '#008080', + 'thistle': '#d8bfd8', + 'tomato': '#ff6347', + 'turquoise': '#40e0d0', + 'violet': '#ee82ee', + 'wheat': '#f5deb3', + 'white': '#ffffff', + 'whitesmoke': '#f5f5f5', + 'yellow': '#ffff00', + 'yellowgreen': '#9acd32' + }; + + var unitConversions = { + length: { + 'm': 1, + 'cm': 0.01, + 'mm': 0.001, + 'in': 0.0254, + 'px': 0.0254 / 96, + 'pt': 0.0254 / 72, + 'pc': 0.0254 / 72 * 12 + }, + duration: { + 's': 1, + 'ms': 0.001 + }, + angle: { + 'rad': 1 / (2 * Math.PI), + 'deg': 1 / 360, + 'grad': 1 / 400, + 'turn': 1 + } + }; + + var data = { + colors: colors, + unitConversions: unitConversions + }; + + function _typeof(obj) { + if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { + _typeof = function (obj) { + return typeof obj; + }; + } else { + _typeof = function (obj) { + return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; + }; + } -var options = require('../less/default-options')(); + return _typeof(obj); + } -if (window.less) { - for (key in window.less) { - if (window.less.hasOwnProperty(key)) { - options[key] = window.less[key]; - } + function _classCallCheck(instance, Constructor) { + if (!(instance instanceof Constructor)) { + throw new TypeError("Cannot call a class as a function"); } -} -require('./add-default-options')(window, options); + } -options.plugins = options.plugins || []; + function _defineProperties(target, props) { + for (var i = 0; i < props.length; i++) { + var descriptor = props[i]; + descriptor.enumerable = descriptor.enumerable || false; + descriptor.configurable = true; + if ("value" in descriptor) descriptor.writable = true; + Object.defineProperty(target, descriptor.key, descriptor); + } + } -if (window.LESS_PLUGINS) { - options.plugins = options.plugins.concat(window.LESS_PLUGINS); -} + function _createClass(Constructor, protoProps, staticProps) { + if (protoProps) _defineProperties(Constructor.prototype, protoProps); + if (staticProps) _defineProperties(Constructor, staticProps); + return Constructor; + } -var less = module.exports = require('./index')(window, options); + function _inherits(subClass, superClass) { + if (typeof superClass !== "function" && superClass !== null) { + throw new TypeError("Super expression must either be null or a function"); + } -window.less = less; + subClass.prototype = Object.create(superClass && superClass.prototype, { + constructor: { + value: subClass, + writable: true, + configurable: true + } + }); + if (superClass) _setPrototypeOf(subClass, superClass); + } -var css, head, style; + function _setPrototypeOf(o, p) { + _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { + o.__proto__ = p; + return o; + }; -// Always restore page visibility -function resolveOrReject(data) { - if (data.filename) { - console.warn(data); - } - if (!options.async) { - head.removeChild(style); - } -} + return _setPrototypeOf(o, p); + } -if (options.onReady) { - if (/!watch/.test(window.location.hash)) { - less.watch(); + function _assertThisInitialized(self) { + if (self === void 0) { + throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } - // Simulate synchronous stylesheet loading by hiding page rendering - if (!options.async) { - css = 'body { display: none !important }'; - head = document.head || document.getElementsByTagName('head')[0]; - style = document.createElement('style'); - style.type = 'text/css'; - if (style.styleSheet) { - style.styleSheet.cssText = css; - } else { - style.appendChild(document.createTextNode(css)); - } + return self; + } - head.appendChild(style); + function _possibleConstructorReturn(self, call) { + if (call && (typeof call === "object" || typeof call === "function")) { + return call; } - less.registerStylesheetsImmediately(); - less.pageLoadFinished = less.refresh(less.env === 'development').then(resolveOrReject, resolveOrReject); -} -},{"../less/default-options":17,"./add-default-options":1,"./index":8,"promise/polyfill":104}],3:[function(require,module,exports){ -var utils = require('./utils'); -module.exports = { - createCSS: function (document, styles, sheet) { - // Strip the query-string - var href = sheet.href || ''; - - // If there is no title set, use the filename, minus the extension - var id = 'less:' + (sheet.title || utils.extractId(href)); + return _assertThisInitialized(self); + } - // If this has already been inserted into the DOM, we may need to replace it - var oldStyleNode = document.getElementById(id); - var keepOldStyleNode = false; + function _toConsumableArray(arr) { + return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); + } - // Create a new stylesheet node for insertion or (if necessary) replacement - var styleNode = document.createElement('style'); - styleNode.setAttribute('type', 'text/css'); - if (sheet.media) { - styleNode.setAttribute('media', sheet.media); - } - styleNode.id = id; + function _arrayWithoutHoles(arr) { + if (Array.isArray(arr)) { + for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; - if (!styleNode.styleSheet) { - styleNode.appendChild(document.createTextNode(styles)); + return arr2; + } + } - // If new contents match contents of oldStyleNode, don't replace oldStyleNode - keepOldStyleNode = (oldStyleNode !== null && oldStyleNode.childNodes.length > 0 && styleNode.childNodes.length > 0 && - oldStyleNode.firstChild.nodeValue === styleNode.firstChild.nodeValue); - } + function _iterableToArray(iter) { + if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter); + } - var head = document.getElementsByTagName('head')[0]; + function _nonIterableSpread() { + throw new TypeError("Invalid attempt to spread non-iterable instance"); + } - // If there is no oldStyleNode, just append; otherwise, only append if we need - // to replace oldStyleNode with an updated stylesheet - if (oldStyleNode === null || keepOldStyleNode === false) { - var nextEl = sheet && sheet.nextSibling || null; - if (nextEl) { - nextEl.parentNode.insertBefore(styleNode, nextEl); - } else { - head.appendChild(styleNode); - } + var Node = + /*#__PURE__*/ + function () { + function Node() { + _classCallCheck(this, Node); + + this.parent = null; + this.visibilityBlocks = undefined; + this.nodeVisible = undefined; + this.rootNode = null; + this.parsed = null; + var self = this; + Object.defineProperty(this, 'currentFileInfo', { + get: function get() { + return self.fileInfo(); } - if (oldStyleNode && keepOldStyleNode === false) { - oldStyleNode.parentNode.removeChild(oldStyleNode); + }); + Object.defineProperty(this, 'index', { + get: function get() { + return self.getIndex(); } + }); + } - // For IE. - // This needs to happen *after* the style element is added to the DOM, otherwise IE 7 and 8 may crash. - // See http://social.msdn.microsoft.com/Forums/en-US/7e081b65-878a-4c22-8e68-c10d39c2ed32/internet-explorer-crashes-appending-style-element-to-head - if (styleNode.styleSheet) { - try { - styleNode.styleSheet.cssText = styles; - } catch (e) { - throw new Error('Couldn\'t reassign styleSheet.cssText.'); - } + _createClass(Node, [{ + key: "setParent", + value: function setParent(nodes, parent) { + function set(node) { + if (node && node instanceof Node) { + node.parent = parent; + } } - }, - currentScript: function(window) { - var document = window.document; - return document.currentScript || (function() { - var scripts = document.getElementsByTagName('script'); - return scripts[scripts.length - 1]; - })(); - } -}; -},{"./utils":11}],4:[function(require,module,exports){ -// Cache system is a bit outdated and could do with work + if (Array.isArray(nodes)) { + nodes.forEach(set); + } else { + set(nodes); + } + } + }, { + key: "getIndex", + value: function getIndex() { + return this._index || this.parent && this.parent.getIndex() || 0; + } + }, { + key: "fileInfo", + value: function fileInfo() { + return this._fileInfo || this.parent && this.parent.fileInfo() || {}; + } + }, { + key: "isRulesetLike", + value: function isRulesetLike() { + return false; + } + }, { + key: "toCSS", + value: function toCSS(context) { + var strs = []; + this.genCSS(context, { + add: function add(chunk, fileInfo, index) { + strs.push(chunk); + }, + isEmpty: function isEmpty() { + return strs.length === 0; + } + }); + return strs.join(''); + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + output.add(this.value); + } + }, { + key: "accept", + value: function accept(visitor) { + this.value = visitor.visit(this.value); + } + }, { + key: "eval", + value: function _eval() { + return this; + } + }, { + key: "_operate", + value: function _operate(context, op, a, b) { + switch (op) { + case '+': + return a + b; -module.exports = function(window, options, logger) { - var cache = null; - if (options.env !== 'development') { - try { - cache = (typeof window.localStorage === 'undefined') ? null : window.localStorage; - } catch (_) {} - } - return { - setCSS: function(path, lastModified, modifyVars, styles) { - if (cache) { - logger.info('saving ' + path + ' to cache.'); - try { - cache.setItem(path, styles); - cache.setItem(path + ':timestamp', lastModified); - if (modifyVars) { - cache.setItem(path + ':vars', JSON.stringify(modifyVars)); - } - } catch (e) { - // TODO - could do with adding more robust error handling - logger.error('failed to save "' + path + '" to local storage for caching.'); - } - } - }, - getCSS: function(path, webInfo, modifyVars) { - var css = cache && cache.getItem(path), - timestamp = cache && cache.getItem(path + ':timestamp'), - vars = cache && cache.getItem(path + ':vars'); + case '-': + return a - b; - modifyVars = modifyVars || {}; - vars = vars || "{}"; // if not set, treat as the JSON representation of an empty object + case '*': + return a * b; - if (timestamp && webInfo.lastModified && - (new Date(webInfo.lastModified).valueOf() === - new Date(timestamp).valueOf()) && - JSON.stringify(modifyVars) === vars) { - // Use local copy - return css; - } + case '/': + return a / b; } - }; -}; + } + }, { + key: "fround", + value: function fround(context, value) { + var precision = context && context.numPrecision; // add "epsilon" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded: -},{}],5:[function(require,module,exports){ -var utils = require('./utils'), - browser = require('./browser'); + return precision ? Number((value + 2e-16).toFixed(precision)) : value; + } // Returns true if this node represents root of ast imported by reference -module.exports = function(window, less, options) { + }, { + key: "blocksVisibility", + value: function blocksVisibility() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } - function errorHTML(e, rootHref) { - var id = 'less-error-message:' + utils.extractId(rootHref || ''); - var template = '
  • {content}
    • '; - var elem = window.document.createElement('div'), timer, content, errors = []; - var filename = e.filename || rootHref; - var filenameNoPath = filename.match(/([^\/]+(\?.*)?)$/)[1]; + return this.visibilityBlocks !== 0; + } + }, { + key: "addVisibilityBlock", + value: function addVisibilityBlock() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } - elem.id = id; - elem.className = 'less-error-message'; + this.visibilityBlocks = this.visibilityBlocks + 1; + } + }, { + key: "removeVisibilityBlock", + value: function removeVisibilityBlock() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + + this.visibilityBlocks = this.visibilityBlocks - 1; + } // Turns on node visibility - if called node will be shown in output regardless + // of whether it comes from import by reference or not + + }, { + key: "ensureVisibility", + value: function ensureVisibility() { + this.nodeVisible = true; + } // Turns off node visibility - if called node will NOT be shown in output regardless + // of whether it comes from import by reference or not + + }, { + key: "ensureInvisibility", + value: function ensureInvisibility() { + this.nodeVisible = false; + } // return values: + // false - the node must not be visible + // true - the node must be visible + // undefined or null - the node has the same visibility as its parent + + }, { + key: "isVisible", + value: function isVisible() { + return this.nodeVisible; + } + }, { + key: "visibilityInfo", + value: function visibilityInfo() { + return { + visibilityBlocks: this.visibilityBlocks, + nodeVisible: this.nodeVisible + }; + } + }, { + key: "copyVisibilityInfo", + value: function copyVisibilityInfo(info) { + if (!info) { + return; + } - content = '

    ' + (e.type || 'Syntax') + 'Error: ' + (e.message || 'There is an error in your .less file') + - '

    ' + '

    in ' + filenameNoPath + ' '; + this.visibilityBlocks = info.visibilityBlocks; + this.nodeVisible = info.nodeVisible; + } + }]); - var errorline = function (e, i, classname) { - if (e.extract[i] !== undefined) { - errors.push(template.replace(/\{line\}/, (parseInt(e.line, 10) || 0) + (i - 1)) - .replace(/\{class\}/, classname) - .replace(/\{content\}/, e.extract[i])); - } - }; + return Node; + }(); - if (e.line) { - errorline(e, 0, ''); - errorline(e, 1, 'line'); - errorline(e, 2, ''); - content += 'on line ' + e.line + ', column ' + (e.column + 1) + ':

    ' + - '
      ' + errors.join('') + '
    '; - } - if (e.stack && (e.extract || options.logLevel >= 4)) { - content += '
    Stack Trace
    ' + e.stack.split('\n').slice(1).join('
    '); - } - elem.innerHTML = content; - - // CSS for error messages - browser.createCSS(window.document, [ - '.less-error-message ul, .less-error-message li {', - 'list-style-type: none;', - 'margin-right: 15px;', - 'padding: 4px 0;', - 'margin: 0;', - '}', - '.less-error-message label {', - 'font-size: 12px;', - 'margin-right: 15px;', - 'padding: 4px 0;', - 'color: #cc7777;', - '}', - '.less-error-message pre {', - 'color: #dd6666;', - 'padding: 4px 0;', - 'margin: 0;', - 'display: inline-block;', - '}', - '.less-error-message pre.line {', - 'color: #ff0000;', - '}', - '.less-error-message h3 {', - 'font-size: 20px;', - 'font-weight: bold;', - 'padding: 15px 0 5px 0;', - 'margin: 0;', - '}', - '.less-error-message a {', - 'color: #10a', - '}', - '.less-error-message .error {', - 'color: red;', - 'font-weight: bold;', - 'padding-bottom: 2px;', - 'border-bottom: 1px dashed red;', - '}' - ].join('\n'), { title: 'error-message' }); - - elem.style.cssText = [ - 'font-family: Arial, sans-serif', - 'border: 1px solid #e00', - 'background-color: #eee', - 'border-radius: 5px', - '-webkit-border-radius: 5px', - '-moz-border-radius: 5px', - 'color: #e00', - 'padding: 15px', - 'margin-bottom: 15px' - ].join(';'); - - if (options.env === 'development') { - timer = setInterval(function () { - var document = window.document, - body = document.body; - if (body) { - if (document.getElementById(id)) { - body.replaceChild(elem, document.getElementById(id)); - } else { - body.insertBefore(elem, body.firstChild); - } - clearInterval(timer); - } - }, 10); - } + Node.compare = function (a, b) { + /* returns: + -1: a < b + 0: a = b + 1: a > b + and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */ + if (a.compare && // for "symmetric results" force toCSS-based comparison + // of Quoted or Anonymous if either value is one of those + !(b.type === 'Quoted' || b.type === 'Anonymous')) { + return a.compare(b); + } else if (b.compare) { + return -b.compare(a); + } else if (a.type !== b.type) { + return undefined; } - function removeErrorHTML(path) { - var node = window.document.getElementById('less-error-message:' + utils.extractId(path)); - if (node) { - node.parentNode.removeChild(node); - } - } + a = a.value; + b = b.value; - function removeErrorConsole(path) { - // no action + if (!Array.isArray(a)) { + return a === b ? 0 : undefined; } - function removeError(path) { - if (!options.errorReporting || options.errorReporting === 'html') { - removeErrorHTML(path); - } else if (options.errorReporting === 'console') { - removeErrorConsole(path); - } else if (typeof options.errorReporting === 'function') { - options.errorReporting('remove', path); - } + if (a.length !== b.length) { + return undefined; } - function errorConsole(e, rootHref) { - var template = '{line} {content}'; - var filename = e.filename || rootHref; - var errors = []; - var content = (e.type || 'Syntax') + 'Error: ' + (e.message || 'There is an error in your .less file') + - ' in ' + filename; - - var errorline = function (e, i, classname) { - if (e.extract[i] !== undefined) { - errors.push(template.replace(/\{line\}/, (parseInt(e.line, 10) || 0) + (i - 1)) - .replace(/\{class\}/, classname) - .replace(/\{content\}/, e.extract[i])); - } - }; - - if (e.line) { - errorline(e, 0, ''); - errorline(e, 1, 'line'); - errorline(e, 2, ''); - content += ' on line ' + e.line + ', column ' + (e.column + 1) + ':\n' + - errors.join('\n'); - } - if (e.stack && (e.extract || options.logLevel >= 4)) { - content += '\nStack Trace\n' + e.stack; - } - less.logger.error(content); + for (var i = 0; i < a.length; i++) { + if (Node.compare(a[i], b[i]) !== 0) { + return undefined; + } } - function error(e, rootHref) { - if (!options.errorReporting || options.errorReporting === 'html') { - errorHTML(e, rootHref); - } else if (options.errorReporting === 'console') { - errorConsole(e, rootHref); - } else if (typeof options.errorReporting === 'function') { - options.errorReporting('add', e, rootHref); - } - } + return 0; + }; - return { - add: error, - remove: removeError - }; -}; + Node.numericCompare = function (a, b) { + return a < b ? -1 : a === b ? 0 : a > b ? 1 : undefined; + }; -},{"./browser":3,"./utils":11}],6:[function(require,module,exports){ -/* global window, XMLHttpRequest */ + // RGB Colors - #ff0014, #eee + // -module.exports = function(options, logger) { + var Color = + /*#__PURE__*/ + function (_Node) { + _inherits(Color, _Node); - var AbstractFileManager = require('../less/environment/abstract-file-manager.js'); + function Color(rgb, a, originalForm) { + var _this; - var fileCache = {}; + _classCallCheck(this, Color); - // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load - var FileManager = function() { - }; + var self = _assertThisInitialized(_this); // + // The end goal here, is to parse the arguments + // into an integer triplet, such as `128, 255, 0` + // + // This facilitates operations and conversions. + // - FileManager.prototype = new AbstractFileManager(); - FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() { - return true; - }; - FileManager.prototype.join = function join(basePath, laterPath) { - if (!basePath) { - return laterPath; - } - return this.extractUrlParts(laterPath, basePath).path; - }; - FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) { + if (Array.isArray(rgb)) { + _this.rgb = rgb; + } else if (rgb.length >= 6) { + _this.rgb = []; + rgb.match(/.{2}/g).map(function (c, i) { + if (i < 3) { + self.rgb.push(parseInt(c, 16)); + } else { + self.alpha = parseInt(c, 16) / 255; + } + }); + } else { + _this.rgb = []; + rgb.split('').map(function (c, i) { + if (i < 3) { + self.rgb.push(parseInt(c + c, 16)); + } else { + self.alpha = parseInt(c + c, 16) / 255; + } + }); + } - var xhr = new XMLHttpRequest(); - var async = options.isFileProtocol ? options.fileAsync : true; + _this.alpha = _this.alpha || (typeof a === 'number' ? a : 1); - if (typeof xhr.overrideMimeType === 'function') { - xhr.overrideMimeType('text/css'); - } - logger.debug('XHR: Getting \'' + url + '\''); - xhr.open('GET', url, async); - xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5'); - xhr.send(null); + if (typeof originalForm !== 'undefined') { + _this.value = originalForm; + } - function handleResponse(xhr, callback, errback) { - if (xhr.status >= 200 && xhr.status < 300) { - callback(xhr.responseText, - xhr.getResponseHeader('Last-Modified')); - } else if (typeof errback === 'function') { - errback(xhr.status, url); - } - } + return _possibleConstructorReturn(_this); + } - if (options.isFileProtocol && !options.fileAsync) { - if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) { - callback(xhr.responseText); + _createClass(Color, [{ + key: "luma", + value: function luma() { + var r = this.rgb[0] / 255; + var g = this.rgb[1] / 255; + var b = this.rgb[2] / 255; + r = r <= 0.03928 ? r / 12.92 : Math.pow((r + 0.055) / 1.055, 2.4); + g = g <= 0.03928 ? g / 12.92 : Math.pow((g + 0.055) / 1.055, 2.4); + b = b <= 0.03928 ? b / 12.92 : Math.pow((b + 0.055) / 1.055, 2.4); + return 0.2126 * r + 0.7152 * g + 0.0722 * b; + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + output.add(this.toCSS(context)); + } + }, { + key: "toCSS", + value: function toCSS(context, doNotCompress) { + var compress = context && context.compress && !doNotCompress; + var color; + var alpha; + var colorFunction; + var args = []; // `value` is set if this color was originally + // converted from a named color string so we need + // to respect this and try to output named color too. + + alpha = this.fround(context, this.alpha); + + if (this.value) { + if (this.value.indexOf('rgb') === 0) { + if (alpha < 1) { + colorFunction = 'rgba'; + } + } else if (this.value.indexOf('hsl') === 0) { + if (alpha < 1) { + colorFunction = 'hsla'; } else { - errback(xhr.status, url); + colorFunction = 'hsl'; } - } else if (async) { - xhr.onreadystatechange = function () { - if (xhr.readyState == 4) { - handleResponse(xhr, callback, errback); - } - }; + } else { + return this.value; + } } else { - handleResponse(xhr, callback, errback); + if (alpha < 1) { + colorFunction = 'rgba'; + } } - }; - FileManager.prototype.supports = function(filename, currentDirectory, options, environment) { - return true; - }; - FileManager.prototype.clearFileCache = function() { - fileCache = {}; - }; + switch (colorFunction) { + case 'rgba': + args = this.rgb.map(function (c) { + return clamp(Math.round(c), 255); + }).concat(clamp(alpha, 1)); + break; - FileManager.prototype.loadFile = function loadFile(filename, currentDirectory, options, environment) { - // TODO: Add prefix support like less-node? - // What about multiple paths? + case 'hsla': + args.push(clamp(alpha, 1)); - if (currentDirectory && !this.isPathAbsolute(filename)) { - filename = currentDirectory + filename; + case 'hsl': + color = this.toHSL(); + args = [this.fround(context, color.h), "".concat(this.fround(context, color.s * 100), "%"), "".concat(this.fround(context, color.l * 100), "%")].concat(args); } - filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename; - - options = options || {}; - - // sheet may be set to the stylesheet for the initial load or a collection of properties including - // some context variables for imports - var hrefParts = this.extractUrlParts(filename, window.location.href); - var href = hrefParts.url; - var self = this; - - return new Promise(function(resolve, reject) { - if (options.useFileCache && fileCache[href]) { - try { - var lessText = fileCache[href]; - return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }}); - } catch (e) { - return reject({ filename: href, message: 'Error loading file ' + href + ' error was ' + e.message }); - } - } - - self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) { - // per file cache - fileCache[href] = data; + if (colorFunction) { + // Values are capped between `0` and `255`, rounded and zero-padded. + return "".concat(colorFunction, "(").concat(args.join(",".concat(compress ? '' : ' ')), ")"); + } - // Use remote copy (re-parse) - resolve({ contents: data, filename: href, webInfo: { lastModified: lastModified }}); - }, function doXHRError(status, url) { - reject({ type: 'File', message: '\'' + url + '\' wasn\'t found (' + status + ')', href: href }); - }); - }); - }; + color = this.toRGB(); - return FileManager; -}; + if (compress) { + var splitcolor = color.split(''); // Convert color to short format -},{"../less/environment/abstract-file-manager.js":18}],7:[function(require,module,exports){ -module.exports = function() { + if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) { + color = "#".concat(splitcolor[1]).concat(splitcolor[3]).concat(splitcolor[5]); + } + } - var functionRegistry = require('./../less/functions/function-registry'); + return color; + } // + // Operations have to be done per-channel, if not, + // channels will spill onto each other. Once we have + // our result, in the form of an integer triplet, + // we create a new Color node to hold the result. + // - function imageSize() { - throw { - type: 'Runtime', - message: 'Image size functions are not supported in browser version of less' - }; - } + }, { + key: "operate", + value: function operate(context, op, other) { + var rgb = new Array(3); + var alpha = this.alpha * (1 - other.alpha) + other.alpha; - var imageFunctions = { - 'image-size': function(filePathNode) { - imageSize(this, filePathNode); - return -1; - }, - 'image-width': function(filePathNode) { - imageSize(this, filePathNode); - return -1; - }, - 'image-height': function(filePathNode) { - imageSize(this, filePathNode); - return -1; + for (var c = 0; c < 3; c++) { + rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]); } - }; - - functionRegistry.addMultiple(imageFunctions); -}; -},{"./../less/functions/function-registry":27}],8:[function(require,module,exports){ -// -// index.js -// Should expose the additional browser functions on to the less object -// -var addDataAttr = require('./utils').addDataAttr, - browser = require('./browser'); + return new Color(rgb, alpha); + } + }, { + key: "toRGB", + value: function toRGB() { + return toHex(this.rgb); + } + }, { + key: "toHSL", + value: function toHSL() { + var r = this.rgb[0] / 255; + var g = this.rgb[1] / 255; + var b = this.rgb[2] / 255; + var a = this.alpha; + var max = Math.max(r, g, b); + var min = Math.min(r, g, b); + var h; + var s; + var l = (max + min) / 2; + var d = max - min; + + if (max === min) { + h = s = 0; + } else { + s = l > 0.5 ? d / (2 - max - min) : d / (max + min); -module.exports = function(window, options) { - var document = window.document; - var less = require('../less')(); - - less.options = options; - var environment = less.environment, - FileManager = require('./file-manager')(options, less.logger), - fileManager = new FileManager(); - environment.addFileManager(fileManager); - less.FileManager = FileManager; - less.PluginLoader = require('./plugin-loader'); + switch (max) { + case r: + h = (g - b) / d + (g < b ? 6 : 0); + break; - require('./log-listener')(less, options); - var errors = require('./error-reporting')(window, less, options); - var cache = less.cache = options.cache || require('./cache')(window, options, less.logger); - require('./image-size')(less.environment); + case g: + h = (b - r) / d + 2; + break; - // Setup user functions - Deprecate? - if (options.functions) { - less.functions.functionRegistry.addMultiple(options.functions); - } + case b: + h = (r - g) / d + 4; + break; + } - var typePattern = /^text\/(x-)?less$/; + h /= 6; + } - function clone(obj) { - var cloned = {}; - for (var prop in obj) { - if (obj.hasOwnProperty(prop)) { - cloned[prop] = obj[prop]; - } + return { + h: h * 360, + s: s, + l: l, + a: a + }; + } // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript + + }, { + key: "toHSV", + value: function toHSV() { + var r = this.rgb[0] / 255; + var g = this.rgb[1] / 255; + var b = this.rgb[2] / 255; + var a = this.alpha; + var max = Math.max(r, g, b); + var min = Math.min(r, g, b); + var h; + var s; + var v = max; + var d = max - min; + + if (max === 0) { + s = 0; + } else { + s = d / max; } - return cloned; - } - // only really needed for phantom - function bind(func, thisArg) { - var curryArgs = Array.prototype.slice.call(arguments, 2); - return function() { - var args = curryArgs.concat(Array.prototype.slice.call(arguments, 0)); - return func.apply(thisArg, args); + if (max === min) { + h = 0; + } else { + switch (max) { + case r: + h = (g - b) / d + (g < b ? 6 : 0); + break; + + case g: + h = (b - r) / d + 2; + break; + + case b: + h = (r - g) / d + 4; + break; + } + + h /= 6; + } + + return { + h: h * 360, + s: s, + v: v, + a: a }; + } + }, { + key: "toARGB", + value: function toARGB() { + return toHex([this.alpha * 255].concat(this.rgb)); + } + }, { + key: "compare", + value: function compare(x) { + return x.rgb && x.rgb[0] === this.rgb[0] && x.rgb[1] === this.rgb[1] && x.rgb[2] === this.rgb[2] && x.alpha === this.alpha ? 0 : undefined; + } + }]); + + return Color; + }(Node); + + Color.prototype.type = 'Color'; + + function clamp(v, max) { + return Math.min(Math.max(v, 0), max); + } + + function toHex(v) { + return "#".concat(v.map(function (c) { + c = clamp(Math.round(c), 255); + return (c < 16 ? '0' : '') + c.toString(16); + }).join('')); + } + + Color.fromKeyword = function (keyword) { + var c; + var key = keyword.toLowerCase(); + + if (colors.hasOwnProperty(key)) { + c = new Color(colors[key].slice(1)); + } else if (key === 'transparent') { + c = new Color([0, 0, 0], 0); } - function loadStyles(modifyVars) { - var styles = document.getElementsByTagName('style'), - style; - - for (var i = 0; i < styles.length; i++) { - style = styles[i]; - if (style.type.match(typePattern)) { - var instanceOptions = clone(options); - instanceOptions.modifyVars = modifyVars; - var lessText = style.innerHTML || ''; - instanceOptions.filename = document.location.href.replace(/#.*$/, ''); - - /* jshint loopfunc:true */ - // use closure to store current style - less.render(lessText, instanceOptions, - bind(function(style, e, result) { - if (e) { - errors.add(e, 'inline'); - } else { - style.type = 'text/css'; - if (style.styleSheet) { - style.styleSheet.cssText = result.css; - } else { - style.innerHTML = result.css; - } - } - }, null, style)); - } - } + if (c) { + c.value = keyword; + return c; } + }; - function loadStyleSheet(sheet, callback, reload, remaining, modifyVars) { + var Paren = + /*#__PURE__*/ + function (_Node) { + _inherits(Paren, _Node); - var instanceOptions = clone(options); - addDataAttr(instanceOptions, sheet); - instanceOptions.mime = sheet.type; + function Paren(node) { + var _this; - if (modifyVars) { - instanceOptions.modifyVars = modifyVars; - } + _classCallCheck(this, Paren); - function loadInitialFileCallback(loadedFile) { + _this.value = node; + return _possibleConstructorReturn(_this); + } - var data = loadedFile.contents, - path = loadedFile.filename, - webInfo = loadedFile.webInfo; + _createClass(Paren, [{ + key: "genCSS", + value: function genCSS(context, output) { + output.add('('); + this.value.genCSS(context, output); + output.add(')'); + } + }, { + key: "eval", + value: function _eval(context) { + return new Paren(this.value.eval(context)); + } + }]); - var newFileInfo = { - currentDirectory: fileManager.getPath(path), - filename: path, - rootFilename: path, - rewriteUrls: instanceOptions.rewriteUrls - }; + return Paren; + }(Node); - newFileInfo.entryPath = newFileInfo.currentDirectory; - newFileInfo.rootpath = instanceOptions.rootpath || newFileInfo.currentDirectory; + Paren.prototype.type = 'Paren'; - if (webInfo) { - webInfo.remaining = remaining; + var Combinator = + /*#__PURE__*/ + function (_Node) { + _inherits(Combinator, _Node); - var css = cache.getCSS(path, webInfo, instanceOptions.modifyVars); - if (!reload && css) { - webInfo.local = true; - callback(null, css, data, sheet, webInfo, path); - return; - } + function Combinator(value) { + var _this; - } + _classCallCheck(this, Combinator); - // TODO add tests around how this behaves when reloading - errors.remove(path); + if (value === ' ') { + _this.value = ' '; + _this.emptyOrWhitespace = true; + } else { + _this.value = value ? value.trim() : ''; + _this.emptyOrWhitespace = _this.value === ''; + } - instanceOptions.rootFileInfo = newFileInfo; - less.render(data, instanceOptions, function(e, result) { - if (e) { - e.href = path; - callback(e); - } else { - cache.setCSS(sheet.href, webInfo.lastModified, instanceOptions.modifyVars, result.css); - callback(null, result.css, data, sheet, webInfo, path); - } - }); - } + return _possibleConstructorReturn(_this); + } - fileManager.loadFile(sheet.href, null, instanceOptions, environment) - .then(function(loadedFile) { - loadInitialFileCallback(loadedFile); - }).catch(function(err) { - console.log(err); - callback(err); - }); + _createClass(Combinator, [{ + key: "genCSS", + value: function genCSS(context, output) { + var spaceOrEmpty = context.compress || _noSpaceCombinators[this.value] ? '' : ' '; + output.add(spaceOrEmpty + this.value + spaceOrEmpty); + } + }]); - } + return Combinator; + }(Node); - function loadStyleSheets(callback, reload, modifyVars) { - for (var i = 0; i < less.sheets.length; i++) { - loadStyleSheet(less.sheets[i], callback, reload, less.sheets.length - (i + 1), modifyVars); - } - } + Combinator.prototype.type = 'Combinator'; + var _noSpaceCombinators = { + '': true, + ' ': true, + '|': true + }; - function initRunningMode() { - if (less.env === 'development') { - less.watchTimer = setInterval(function () { - if (less.watchMode) { - fileManager.clearFileCache(); - loadStyleSheets(function (e, css, _, sheet, webInfo) { - if (e) { - errors.add(e, e.href || sheet.href); - } else if (css) { - browser.createCSS(window.document, css, sheet); - } - }); - } - }, options.poll); - } + var Element = + /*#__PURE__*/ + function (_Node) { + _inherits(Element, _Node); + + function Element(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) { + var _this; + + _classCallCheck(this, Element); + + _this.combinator = combinator instanceof Combinator ? combinator : new Combinator(combinator); + + if (typeof value === 'string') { + _this.value = value.trim(); + } else if (value) { + _this.value = value; + } else { + _this.value = ''; + } + + _this.isVariable = isVariable; + _this._index = index; + _this._fileInfo = currentFileInfo; + + _this.copyVisibilityInfo(visibilityInfo); + + _this.setParent(_this.combinator, _assertThisInitialized(_this)); + + return _possibleConstructorReturn(_this); } - // - // Watch mode - // - less.watch = function () { - if (!less.watchMode ) { - less.env = 'development'; - initRunningMode(); + _createClass(Element, [{ + key: "accept", + value: function accept(visitor) { + var value = this.value; + this.combinator = visitor.visit(this.combinator); + + if (_typeof(value) === 'object') { + this.value = visitor.visit(value); } - this.watchMode = true; - return true; - }; + } + }, { + key: "eval", + value: function _eval(context) { + return new Element(this.combinator, this.value.eval ? this.value.eval(context) : this.value, this.isVariable, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + }, { + key: "clone", + value: function clone() { + return new Element(this.combinator, this.value, this.isVariable, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + output.add(this.toCSS(context), this.fileInfo(), this.getIndex()); + } + }, { + key: "toCSS", + value: function toCSS() { + var context = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {}; + var value = this.value; + var firstSelector = context.firstSelector; - less.unwatch = function () {clearInterval(less.watchTimer); this.watchMode = false; return false; }; + if (value instanceof Paren) { + // selector in parens should not be affected by outer selector + // flags (breaks only interpolated selectors - see #1973) + context.firstSelector = true; + } - // - // Synchronously get all tags with the 'rel' attribute set to - // "stylesheet/less". - // - less.registerStylesheetsImmediately = function() { - var links = document.getElementsByTagName('link'); - less.sheets = []; + value = value.toCSS ? value.toCSS(context) : value; + context.firstSelector = firstSelector; - for (var i = 0; i < links.length; i++) { - if (links[i].rel === 'stylesheet/less' || (links[i].rel.match(/stylesheet/) && - (links[i].type.match(typePattern)))) { - less.sheets.push(links[i]); - } + if (value === '' && this.combinator.value.charAt(0) === '&') { + return ''; + } else { + return this.combinator.toCSS(context) + value; } - }; + } + }]); + + return Element; + }(Node); + + Element.prototype.type = 'Element'; + + var Math$1 = { + ALWAYS: 0, + PARENS_DIVISION: 1, + PARENS: 2, + STRICT_LEGACY: 3 + }; + var RewriteUrls = { + OFF: 0, + LOCAL: 1, + ALL: 2 + }; + + function createCommonjsModule(fn, module) { + return module = { exports: {} }, fn(module, module.exports), module.exports; + } - // - // Asynchronously get all tags with the 'rel' attribute set to - // "stylesheet/less", returning a Promise. - // - less.registerStylesheets = function() { - return new Promise(function(resolve, reject) { - less.registerStylesheetsImmediately(); - resolve(); - }); - }; + var clone_1 = createCommonjsModule(function (module) { + var clone = (function() { - // - // With this function, it's possible to alter variables and re-render - // CSS without reloading less-files - // - less.modifyVars = function(record) { - return less.refresh(true, record, false); - }; + function _instanceof(obj, type) { + return type != null && obj instanceof type; + } - less.refresh = function (reload, modifyVars, clearFileCache) { - if ((reload || clearFileCache) && clearFileCache !== false) { - fileManager.clearFileCache(); - } - return new Promise(function (resolve, reject) { - var startTime, endTime, totalMilliseconds, remainingSheets; - startTime = endTime = new Date(); + var nativeMap; + try { + nativeMap = Map; + } catch(_) { + // maybe a reference error because no `Map`. Give it a dummy value that no + // value will ever be an instanceof. + nativeMap = function() {}; + } - // Set counter for remaining unprocessed sheets - remainingSheets = less.sheets.length; + var nativeSet; + try { + nativeSet = Set; + } catch(_) { + nativeSet = function() {}; + } - if (remainingSheets === 0) { + var nativePromise; + try { + nativePromise = Promise; + } catch(_) { + nativePromise = function() {}; + } - endTime = new Date(); - totalMilliseconds = endTime - startTime; - less.logger.info('Less has finished and no sheets were loaded.'); - resolve({ - startTime: startTime, - endTime: endTime, - totalMilliseconds: totalMilliseconds, - sheets: less.sheets.length - }); + /** + * Clones (copies) an Object using deep copying. + * + * This function supports circular references by default, but if you are certain + * there are no circular references in your object, you can save some CPU time + * by calling clone(obj, false). + * + * Caution: if `circular` is false and `parent` contains circular references, + * your program may enter an infinite loop and crash. + * + * @param `parent` - the object to be cloned + * @param `circular` - set to true if the object to be cloned may contain + * circular references. (optional - true by default) + * @param `depth` - set to a number if the object is only to be cloned to + * a particular depth. (optional - defaults to Infinity) + * @param `prototype` - sets the prototype to be used when cloning an object. + * (optional - defaults to parent prototype). + * @param `includeNonEnumerable` - set to true if the non-enumerable properties + * should be cloned as well. Non-enumerable properties on the prototype + * chain will be ignored. (optional - false by default) + */ + function clone(parent, circular, depth, prototype, includeNonEnumerable) { + if (typeof circular === 'object') { + depth = circular.depth; + prototype = circular.prototype; + includeNonEnumerable = circular.includeNonEnumerable; + circular = circular.circular; + } + // maintain two arrays for circular references, where corresponding parents + // and children have the same index + var allParents = []; + var allChildren = []; + + var useBuffer = typeof Buffer != 'undefined'; + + if (typeof circular == 'undefined') + circular = true; + + if (typeof depth == 'undefined') + depth = Infinity; + + // recurse this function so we don't reset allParents and allChildren + function _clone(parent, depth) { + // cloning null always returns null + if (parent === null) + return null; - } else { - // Relies on less.sheets array, callback seems to be guaranteed to be called for every element of the array - loadStyleSheets(function (e, css, _, sheet, webInfo) { - if (e) { - errors.add(e, e.href || sheet.href); - reject(e); - return; - } - if (webInfo.local) { - less.logger.info('Loading ' + sheet.href + ' from cache.'); - } else { - less.logger.info('Rendered ' + sheet.href + ' successfully.'); - } - browser.createCSS(window.document, css, sheet); - less.logger.info('CSS for ' + sheet.href + ' generated in ' + (new Date() - endTime) + 'ms'); - - // Count completed sheet - remainingSheets--; - - // Check if the last remaining sheet was processed and then call the promise - if (remainingSheets === 0) { - totalMilliseconds = new Date() - startTime; - less.logger.info('Less has finished. CSS generated in ' + totalMilliseconds + 'ms'); - resolve({ - startTime: startTime, - endTime: endTime, - totalMilliseconds: totalMilliseconds, - sheets: less.sheets.length - }); - } - endTime = new Date(); - }, reload, modifyVars); - } + if (depth === 0) + return parent; - loadStyles(modifyVars); + var child; + var proto; + if (typeof parent != 'object') { + return parent; + } + + if (_instanceof(parent, nativeMap)) { + child = new nativeMap(); + } else if (_instanceof(parent, nativeSet)) { + child = new nativeSet(); + } else if (_instanceof(parent, nativePromise)) { + child = new nativePromise(function (resolve, reject) { + parent.then(function(value) { + resolve(_clone(value, depth - 1)); + }, function(err) { + reject(_clone(err, depth - 1)); + }); }); - }; + } else if (clone.__isArray(parent)) { + child = []; + } else if (clone.__isRegExp(parent)) { + child = new RegExp(parent.source, __getRegExpFlags(parent)); + if (parent.lastIndex) child.lastIndex = parent.lastIndex; + } else if (clone.__isDate(parent)) { + child = new Date(parent.getTime()); + } else if (useBuffer && Buffer.isBuffer(parent)) { + if (Buffer.allocUnsafe) { + // Node.js >= 4.5.0 + child = Buffer.allocUnsafe(parent.length); + } else { + // Older Node.js versions + child = new Buffer(parent.length); + } + parent.copy(child); + return child; + } else if (_instanceof(parent, Error)) { + child = Object.create(parent); + } else { + if (typeof prototype == 'undefined') { + proto = Object.getPrototypeOf(parent); + child = Object.create(proto); + } + else { + child = Object.create(prototype); + proto = prototype; + } + } - less.refreshStyles = loadStyles; - return less; -}; + if (circular) { + var index = allParents.indexOf(parent); -},{"../less":37,"./browser":3,"./cache":4,"./error-reporting":5,"./file-manager":6,"./image-size":7,"./log-listener":9,"./plugin-loader":10,"./utils":11}],9:[function(require,module,exports){ -module.exports = function(less, options) { + if (index != -1) { + return allChildren[index]; + } + allParents.push(parent); + allChildren.push(child); + } - var logLevel_debug = 4, - logLevel_info = 3, - logLevel_warn = 2, - logLevel_error = 1; + if (_instanceof(parent, nativeMap)) { + parent.forEach(function(value, key) { + var keyChild = _clone(key, depth - 1); + var valueChild = _clone(value, depth - 1); + child.set(keyChild, valueChild); + }); + } + if (_instanceof(parent, nativeSet)) { + parent.forEach(function(value) { + var entryChild = _clone(value, depth - 1); + child.add(entryChild); + }); + } - // The amount of logging in the javascript console. - // 3 - Debug, information and errors - // 2 - Information and errors - // 1 - Errors - // 0 - None - // Defaults to 2 - options.logLevel = typeof options.logLevel !== 'undefined' ? options.logLevel : (options.env === 'development' ? logLevel_info : logLevel_error); + for (var i in parent) { + var attrs; + if (proto) { + attrs = Object.getOwnPropertyDescriptor(proto, i); + } - if (!options.loggers) { - options.loggers = [{ - debug: function(msg) { - if (options.logLevel >= logLevel_debug) { - console.log(msg); - } - }, - info: function(msg) { - if (options.logLevel >= logLevel_info) { - console.log(msg); - } - }, - warn: function(msg) { - if (options.logLevel >= logLevel_warn) { - console.warn(msg); - } - }, - error: function(msg) { - if (options.logLevel >= logLevel_error) { - console.error(msg); - } - } - }]; - } - for (var i = 0; i < options.loggers.length; i++) { - less.logger.addListener(options.loggers[i]); - } -}; + if (attrs && attrs.set == null) { + continue; + } + child[i] = _clone(parent[i], depth - 1); + } -},{}],10:[function(require,module,exports){ -// TODO: Add tests for browser @plugin -/* global window */ + if (Object.getOwnPropertySymbols) { + var symbols = Object.getOwnPropertySymbols(parent); + for (var i = 0; i < symbols.length; i++) { + // Don't need to worry about cloning a symbol because it is a primitive, + // like a number or string. + var symbol = symbols[i]; + var descriptor = Object.getOwnPropertyDescriptor(parent, symbol); + if (descriptor && !descriptor.enumerable && !includeNonEnumerable) { + continue; + } + child[symbol] = _clone(parent[symbol], depth - 1); + if (!descriptor.enumerable) { + Object.defineProperty(child, symbol, { + enumerable: false + }); + } + } + } -var AbstractPluginLoader = require('../less/environment/abstract-plugin-loader.js'); + if (includeNonEnumerable) { + var allPropertyNames = Object.getOwnPropertyNames(parent); + for (var i = 0; i < allPropertyNames.length; i++) { + var propertyName = allPropertyNames[i]; + var descriptor = Object.getOwnPropertyDescriptor(parent, propertyName); + if (descriptor && descriptor.enumerable) { + continue; + } + child[propertyName] = _clone(parent[propertyName], depth - 1); + Object.defineProperty(child, propertyName, { + enumerable: false + }); + } + } -/** - * Browser Plugin Loader - */ -var PluginLoader = function(less) { - this.less = less; - // Should we shim this.require for browser? Probably not? -}; + return child; + } -PluginLoader.prototype = new AbstractPluginLoader(); + return _clone(parent, depth); + } -PluginLoader.prototype.loadPlugin = function(filename, basePath, context, environment, fileManager) { - return new Promise(function(fulfill, reject) { - fileManager.loadFile(filename, basePath, context, environment) - .then(fulfill).catch(reject); - }); -}; + /** + * Simple flat clone using prototype, accepts only objects, usefull for property + * override on FLAT configuration object (no nested props). + * + * USE WITH CAUTION! This may not behave as you wish if you do not know how this + * works. + */ + clone.clonePrototype = function clonePrototype(parent) { + if (parent === null) + return null; -module.exports = PluginLoader; + var c = function () {}; + c.prototype = parent; + return new c(); + }; + // private utility functions -},{"../less/environment/abstract-plugin-loader.js":19}],11:[function(require,module,exports){ -module.exports = { - extractId: function(href) { - return href.replace(/^[a-z-]+:\/+?[^\/]+/, '') // Remove protocol & domain - .replace(/[\?\&]livereload=\w+/, '') // Remove LiveReload cachebuster - .replace(/^\//, '') // Remove root / - .replace(/\.[a-zA-Z]+$/, '') // Remove simple extension - .replace(/[^\.\w-]+/g, '-') // Replace illegal characters - .replace(/\./g, ':'); // Replace dots with colons(for valid id) - }, - addDataAttr: function(options, tag) { - for (var opt in tag.dataset) { - if (tag.dataset.hasOwnProperty(opt)) { - if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') { - options[opt] = tag.dataset[opt]; - } else { - try { - options[opt] = JSON.parse(tag.dataset[opt]); - } - catch (_) {} - } - } - } - } -}; + function __objToStr(o) { + return Object.prototype.toString.call(o); + } + clone.__objToStr = __objToStr; -},{}],12:[function(require,module,exports){ -module.exports = { - Math: { - ALWAYS: 0, - PARENS_DIVISION: 1, - PARENS: 2, - STRICT_LEGACY: 3 - }, - RewriteUrls: { - OFF: 0, - LOCAL: 1, - ALL: 2 - } -}; -},{}],13:[function(require,module,exports){ -var contexts = {}; -module.exports = contexts; -var Constants = require('./constants'); + function __isDate(o) { + return typeof o === 'object' && __objToStr(o) === '[object Date]'; + } + clone.__isDate = __isDate; -var copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) { - if (!original) { return; } + function __isArray(o) { + return typeof o === 'object' && __objToStr(o) === '[object Array]'; + } + clone.__isArray = __isArray; - for (var i = 0; i < propertiesToCopy.length; i++) { - if (original.hasOwnProperty(propertiesToCopy[i])) { - destination[propertiesToCopy[i]] = original[propertiesToCopy[i]]; - } - } -}; - -/* - parse is used whilst parsing - */ -var parseCopyProperties = [ - // options - 'paths', // option - unmodified - paths to search for imports on - 'rewriteUrls', // option - whether to adjust URL's to be relative - 'rootpath', // option - rootpath to append to URL's - 'strictImports', // option - - 'insecure', // option - whether to allow imports from insecure ssl hosts - 'dumpLineNumbers', // option - whether to dump line numbers - 'compress', // option - whether to compress - 'syncImport', // option - whether to import synchronously - 'chunkInput', // option - whether to chunk input. more performant but causes parse issues. - 'mime', // browser only - mime type for sheet import - 'useFileCache', // browser only - whether to use the per file session cache - // context - 'processImports', // option & context - whether to process imports. if false then imports will not be imported. - // Used by the import manager to stop multiple import visitors being created. - 'pluginManager' // Used as the plugin manager for the session -]; - -contexts.Parse = function(options) { - copyFromOriginal(options, this, parseCopyProperties); + function __isRegExp(o) { + return typeof o === 'object' && __objToStr(o) === '[object RegExp]'; + } + clone.__isRegExp = __isRegExp; + + function __getRegExpFlags(re) { + var flags = ''; + if (re.global) flags += 'g'; + if (re.ignoreCase) flags += 'i'; + if (re.multiline) flags += 'm'; + return flags; + } + clone.__getRegExpFlags = __getRegExpFlags; - if (typeof this.paths === 'string') { this.paths = [this.paths]; } -}; - -var evalCopyProperties = [ - 'paths', // additional include paths - 'compress', // whether to compress - 'ieCompat', // whether to enforce IE compatibility (IE8 data-uri) - 'math', // whether math has to be within parenthesis - 'strictUnits', // whether units need to evaluate correctly - 'sourceMap', // whether to output a source map - 'importMultiple', // whether we are currently importing multiple copies - 'urlArgs', // whether to add args into url tokens - 'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false - 'pluginManager', // Used as the plugin manager for the session - 'importantScope', // used to bubble up !important statements - 'rewriteUrls' // option - whether to adjust URL's to be relative -]; - -contexts.Eval = function(options, frames) { - copyFromOriginal(options, this, evalCopyProperties); + return clone; + })(); - if (typeof this.paths === 'string') { this.paths = [this.paths]; } + if ( module.exports) { + module.exports = clone; + } + }); - this.frames = frames || []; - this.importantScope = this.importantScope || []; -}; + /* jshint proto: true */ + function getLocation(index, inputStream) { + var n = index + 1; + var line = null; + var column = -1; -contexts.Eval.prototype.enterCalc = function () { - if (!this.calcStack) { - this.calcStack = []; + while (--n >= 0 && inputStream.charAt(n) !== '\n') { + column++; } - this.calcStack.push(true); - this.inCalc = true; -}; -contexts.Eval.prototype.exitCalc = function () { - this.calcStack.pop(); - if (!this.calcStack) { - this.inCalc = false; + if (typeof index === 'number') { + line = (inputStream.slice(0, index).match(/\n/g) || '').length; } -}; -contexts.Eval.prototype.inParenthesis = function () { - if (!this.parensStack) { - this.parensStack = []; + return { + line: line, + column: column + }; + } + function copyArray(arr) { + var i; + var length = arr.length; + var copy = new Array(length); + + for (i = 0; i < length; i++) { + copy[i] = arr[i]; } - this.parensStack.push(true); -}; -contexts.Eval.prototype.outOfParenthesis = function () { - this.parensStack.pop(); -}; + return copy; + } + function clone(obj) { + var cloned = {}; -contexts.Eval.prototype.inCalc = false; -contexts.Eval.prototype.mathOn = true; -contexts.Eval.prototype.isMathOn = function (op) { - if (!this.mathOn) { - return false; - } - if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) { - return false; - } - if (this.math > Constants.Math.PARENS_DIVISION) { - return this.parensStack && this.parensStack.length; + for (var prop in obj) { + if (obj.hasOwnProperty(prop)) { + cloned[prop] = obj[prop]; + } } - return true; -}; -contexts.Eval.prototype.pathRequiresRewrite = function (path) { - var isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; + return cloned; + } + function copyOptions(obj1, obj2) { + if (obj2 && obj2._defaults) { + return obj2; + } - return isRelative(path); -}; + var opts = utils.defaults(obj1, obj2); -contexts.Eval.prototype.rewritePath = function (path, rootpath) { - var newPath; + if (opts.strictMath) { + opts.math = Math$1.STRICT_LEGACY; + } // Back compat with changed relativeUrls option - rootpath = rootpath || ''; - newPath = this.normalizePath(rootpath + path); - // If a path was explicit relative and the rootpath was not an absolute path - // we must ensure that the new path is also explicit relative. - if (isPathLocalRelative(path) && - isPathRelative(rootpath) && - isPathLocalRelative(newPath) === false) { - newPath = './' + newPath; + if (opts.relativeUrls) { + opts.rewriteUrls = RewriteUrls.ALL; } - return newPath; -}; + if (typeof opts.math === 'string') { + switch (opts.math.toLowerCase()) { + case 'always': + opts.math = Math$1.ALWAYS; + break; -contexts.Eval.prototype.normalizePath = function (path) { - var - segments = path.split('/').reverse(), - segment; + case 'parens-division': + opts.math = Math$1.PARENS_DIVISION; + break; - path = []; - while (segments.length !== 0) { - segment = segments.pop(); - switch ( segment ) { - case '.': - break; - case '..': - if ((path.length === 0) || (path[path.length - 1] === '..')) { - path.push( segment ); - } else { - path.pop(); - } - break; - default: - path.push(segment); - break; - } + case 'strict': + case 'parens': + opts.math = Math$1.PARENS; + break; + + case 'strict-legacy': + opts.math = Math$1.STRICT_LEGACY; + } } - return path.join('/'); -}; + if (typeof opts.rewriteUrls === 'string') { + switch (opts.rewriteUrls.toLowerCase()) { + case 'off': + opts.rewriteUrls = RewriteUrls.OFF; + break; -function isPathRelative(path) { - return !/^(?:[a-z-]+:|\/|#)/i.test(path); -} + case 'local': + opts.rewriteUrls = RewriteUrls.LOCAL; + break; -function isPathLocalRelative(path) { - return path.charAt(0) === '.'; -} - -// todo - do the same for the toCSS ? - -},{"./constants":12}],14:[function(require,module,exports){ -module.exports = { - 'aliceblue':'#f0f8ff', - 'antiquewhite':'#faebd7', - 'aqua':'#00ffff', - 'aquamarine':'#7fffd4', - 'azure':'#f0ffff', - 'beige':'#f5f5dc', - 'bisque':'#ffe4c4', - 'black':'#000000', - 'blanchedalmond':'#ffebcd', - 'blue':'#0000ff', - 'blueviolet':'#8a2be2', - 'brown':'#a52a2a', - 'burlywood':'#deb887', - 'cadetblue':'#5f9ea0', - 'chartreuse':'#7fff00', - 'chocolate':'#d2691e', - 'coral':'#ff7f50', - 'cornflowerblue':'#6495ed', - 'cornsilk':'#fff8dc', - 'crimson':'#dc143c', - 'cyan':'#00ffff', - 'darkblue':'#00008b', - 'darkcyan':'#008b8b', - 'darkgoldenrod':'#b8860b', - 'darkgray':'#a9a9a9', - 'darkgrey':'#a9a9a9', - 'darkgreen':'#006400', - 'darkkhaki':'#bdb76b', - 'darkmagenta':'#8b008b', - 'darkolivegreen':'#556b2f', - 'darkorange':'#ff8c00', - 'darkorchid':'#9932cc', - 'darkred':'#8b0000', - 'darksalmon':'#e9967a', - 'darkseagreen':'#8fbc8f', - 'darkslateblue':'#483d8b', - 'darkslategray':'#2f4f4f', - 'darkslategrey':'#2f4f4f', - 'darkturquoise':'#00ced1', - 'darkviolet':'#9400d3', - 'deeppink':'#ff1493', - 'deepskyblue':'#00bfff', - 'dimgray':'#696969', - 'dimgrey':'#696969', - 'dodgerblue':'#1e90ff', - 'firebrick':'#b22222', - 'floralwhite':'#fffaf0', - 'forestgreen':'#228b22', - 'fuchsia':'#ff00ff', - 'gainsboro':'#dcdcdc', - 'ghostwhite':'#f8f8ff', - 'gold':'#ffd700', - 'goldenrod':'#daa520', - 'gray':'#808080', - 'grey':'#808080', - 'green':'#008000', - 'greenyellow':'#adff2f', - 'honeydew':'#f0fff0', - 'hotpink':'#ff69b4', - 'indianred':'#cd5c5c', - 'indigo':'#4b0082', - 'ivory':'#fffff0', - 'khaki':'#f0e68c', - 'lavender':'#e6e6fa', - 'lavenderblush':'#fff0f5', - 'lawngreen':'#7cfc00', - 'lemonchiffon':'#fffacd', - 'lightblue':'#add8e6', - 'lightcoral':'#f08080', - 'lightcyan':'#e0ffff', - 'lightgoldenrodyellow':'#fafad2', - 'lightgray':'#d3d3d3', - 'lightgrey':'#d3d3d3', - 'lightgreen':'#90ee90', - 'lightpink':'#ffb6c1', - 'lightsalmon':'#ffa07a', - 'lightseagreen':'#20b2aa', - 'lightskyblue':'#87cefa', - 'lightslategray':'#778899', - 'lightslategrey':'#778899', - 'lightsteelblue':'#b0c4de', - 'lightyellow':'#ffffe0', - 'lime':'#00ff00', - 'limegreen':'#32cd32', - 'linen':'#faf0e6', - 'magenta':'#ff00ff', - 'maroon':'#800000', - 'mediumaquamarine':'#66cdaa', - 'mediumblue':'#0000cd', - 'mediumorchid':'#ba55d3', - 'mediumpurple':'#9370d8', - 'mediumseagreen':'#3cb371', - 'mediumslateblue':'#7b68ee', - 'mediumspringgreen':'#00fa9a', - 'mediumturquoise':'#48d1cc', - 'mediumvioletred':'#c71585', - 'midnightblue':'#191970', - 'mintcream':'#f5fffa', - 'mistyrose':'#ffe4e1', - 'moccasin':'#ffe4b5', - 'navajowhite':'#ffdead', - 'navy':'#000080', - 'oldlace':'#fdf5e6', - 'olive':'#808000', - 'olivedrab':'#6b8e23', - 'orange':'#ffa500', - 'orangered':'#ff4500', - 'orchid':'#da70d6', - 'palegoldenrod':'#eee8aa', - 'palegreen':'#98fb98', - 'paleturquoise':'#afeeee', - 'palevioletred':'#d87093', - 'papayawhip':'#ffefd5', - 'peachpuff':'#ffdab9', - 'peru':'#cd853f', - 'pink':'#ffc0cb', - 'plum':'#dda0dd', - 'powderblue':'#b0e0e6', - 'purple':'#800080', - 'rebeccapurple':'#663399', - 'red':'#ff0000', - 'rosybrown':'#bc8f8f', - 'royalblue':'#4169e1', - 'saddlebrown':'#8b4513', - 'salmon':'#fa8072', - 'sandybrown':'#f4a460', - 'seagreen':'#2e8b57', - 'seashell':'#fff5ee', - 'sienna':'#a0522d', - 'silver':'#c0c0c0', - 'skyblue':'#87ceeb', - 'slateblue':'#6a5acd', - 'slategray':'#708090', - 'slategrey':'#708090', - 'snow':'#fffafa', - 'springgreen':'#00ff7f', - 'steelblue':'#4682b4', - 'tan':'#d2b48c', - 'teal':'#008080', - 'thistle':'#d8bfd8', - 'tomato':'#ff6347', - 'turquoise':'#40e0d0', - 'violet':'#ee82ee', - 'wheat':'#f5deb3', - 'white':'#ffffff', - 'whitesmoke':'#f5f5f5', - 'yellow':'#ffff00', - 'yellowgreen':'#9acd32' -}; -},{}],15:[function(require,module,exports){ -module.exports = { - colors: require('./colors'), - unitConversions: require('./unit-conversions') -}; - -},{"./colors":14,"./unit-conversions":16}],16:[function(require,module,exports){ -module.exports = { - length: { - 'm': 1, - 'cm': 0.01, - 'mm': 0.001, - 'in': 0.0254, - 'px': 0.0254 / 96, - 'pt': 0.0254 / 72, - 'pc': 0.0254 / 72 * 12 - }, - duration: { - 's': 1, - 'ms': 0.001 - }, - angle: { - 'rad': 1 / (2 * Math.PI), - 'deg': 1 / 360, - 'grad': 1 / 400, - 'turn': 1 - } -}; -},{}],17:[function(require,module,exports){ -// Export a new default each time -module.exports = function() { - return { - /* Inline Javascript - @plugin still allowed */ - javascriptEnabled: false, - - /* Outputs a makefile import dependency list to stdout. */ - depends: false, - - /* (DEPRECATED) Compress using less built-in compression. - * This does an okay job but does not utilise all the tricks of - * dedicated css compression. */ - compress: false, - - /* Runs the less parser and just reports errors without any output. */ - lint: false, - - /* Sets available include paths. - * If the file in an @import rule does not exist at that exact location, - * less will look for it at the location(s) passed to this option. - * You might use this for instance to specify a path to a library which - * you want to be referenced simply and relatively in the less files. */ - paths: [], - - /* color output in the terminal */ - color: true, - - /* The strictImports controls whether the compiler will allow an @import inside of either - * @media blocks or (a later addition) other selector blocks. - * See: https://github.com/less/less.js/issues/656 */ - strictImports: false, - - /* Allow Imports from Insecure HTTPS Hosts */ - insecure: false, - - /* Allows you to add a path to every generated import and url in your css. - * This does not affect less import statements that are processed, just ones - * that are left in the output css. */ - rootpath: '', - - /* By default URLs are kept as-is, so if you import a file in a sub-directory - * that references an image, exactly the same URL will be output in the css. - * This option allows you to re-write URL's in imported files so that the - * URL is always relative to the base imported file */ - rewriteUrls: false, - - /* Compatibility with IE8. Used for limiting data-uri length */ - ieCompat: false, // true until 3.0 - - /* How to process math - * 0 always - eagerly try to solve all operations - * 1 parens-division - require parens for division "/" - * 2 parens | strict - require parens for all operations - * 3 strict-legacy - legacy strict behavior (super-strict) - */ - math: 0, + case 'all': + opts.rewriteUrls = RewriteUrls.ALL; + break; + } + } - /* Without this option, less attempts to guess at the output unit when it does maths. */ - strictUnits: false, + return opts; + } + function defaults(obj1, obj2) { + var newObj = obj2 || {}; - /* Effectively the declaration is put at the top of your base Less file, - * meaning it can be used but it also can be overridden if this variable - * is defined in the file. */ - globalVars: null, + if (!obj2._defaults) { + newObj = {}; - /* As opposed to the global variable option, this puts the declaration at the - * end of your base file, meaning it will override anything defined in your Less file. */ - modifyVars: null, + var _defaults = clone_1(obj1); - /* This option allows you to specify a argument to go on to every URL. */ - urlArgs: '' + newObj._defaults = _defaults; + var cloned = obj2 ? clone_1(obj2) : {}; + Object.assign(newObj, _defaults, cloned); } -} -},{}],18:[function(require,module,exports){ -var abstractFileManager = function() { -}; -abstractFileManager.prototype.getPath = function (filename) { - var j = filename.lastIndexOf('?'); - if (j > 0) { - filename = filename.slice(0, j); - } - j = filename.lastIndexOf('/'); - if (j < 0) { - j = filename.lastIndexOf('\\'); + return newObj; + } + function merge(obj1, obj2) { + for (var prop in obj2) { + if (obj2.hasOwnProperty(prop)) { + obj1[prop] = obj2[prop]; + } } - if (j < 0) { - return ''; - } - return filename.slice(0, j + 1); -}; - -abstractFileManager.prototype.tryAppendExtension = function(path, ext) { - return /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; -}; -abstractFileManager.prototype.tryAppendLessExtension = function(path) { - return this.tryAppendExtension(path, '.less'); -}; - -abstractFileManager.prototype.supportsSync = function() { - return false; -}; + return obj1; + } + function flattenArray(arr) { + var result = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : []; -abstractFileManager.prototype.alwaysMakePathsAbsolute = function() { - return false; -}; + for (var i = 0, length = arr.length; i < length; i++) { + var value = arr[i]; -abstractFileManager.prototype.isPathAbsolute = function(filename) { - return (/^(?:[a-z-]+:|\/|\\|#)/i).test(filename); -}; -// TODO: pull out / replace? -abstractFileManager.prototype.join = function(basePath, laterPath) { - if (!basePath) { - return laterPath; + if (Array.isArray(value)) { + utils.flattenArray(value, result); + } else { + if (value !== undefined) { + result.push(value); + } + } } - return basePath + laterPath; -}; -abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { - // diff between two paths to create a relative path + return result; + } - var urlParts = this.extractUrlParts(url), - baseUrlParts = this.extractUrlParts(baseUrl), - i, max, urlDirectories, baseUrlDirectories, diff = ''; - if (urlParts.hostPart !== baseUrlParts.hostPart) { - return ''; - } - max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); - for (i = 0; i < max; i++) { - if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; } - } - baseUrlDirectories = baseUrlParts.directories.slice(i); - urlDirectories = urlParts.directories.slice(i); - for (i = 0; i < baseUrlDirectories.length - 1; i++) { - diff += '../'; - } - for (i = 0; i < urlDirectories.length - 1; i++) { - diff += urlDirectories[i] + '/'; - } - return diff; -}; -// helper function, not part of API -abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) { - // urlParts[1] = protocol://hostname/ OR / - // urlParts[2] = / if path relative to host base - // urlParts[3] = directories - // urlParts[4] = filename - // urlParts[5] = parameters + var utils$1 = /*#__PURE__*/Object.freeze({ + getLocation: getLocation, + copyArray: copyArray, + clone: clone, + copyOptions: copyOptions, + defaults: defaults, + merge: merge, + flattenArray: flattenArray + }); - var urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i, - urlParts = url.match(urlPartsRegex), - returner = {}, rawDirectories = [], directories = [], i, baseUrlParts; + /** + * This is a centralized class of any error that could be thrown internally (mostly by the parser). + * Besides standard .message it keeps some additional data like a path to the file where the error + * occurred along with line and column numbers. + * + * @class + * @extends Error + * @type {module.LessError} + * + * @prop {string} type + * @prop {string} filename + * @prop {number} index + * @prop {number} line + * @prop {number} column + * @prop {number} callLine + * @prop {number} callExtract + * @prop {string[]} extract + * + * @param {Object} e - An error object to wrap around or just a descriptive object + * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager? + * @param {string} [currentFilename] + */ + + var LessError = function LessError(e, fileContentMap, currentFilename) { + Error.call(this); + var filename = e.filename || currentFilename; + this.message = e.message; + this.stack = e.stack; - if (!urlParts) { - throw new Error('Could not parse sheet href - \'' + url + '\''); - } + if (fileContentMap && filename) { + var input = fileContentMap.contents[filename]; + var loc = getLocation(e.index, input); + var line = loc.line; + var col = loc.column; + var callLine = e.call && getLocation(e.call, input).line; + var lines = input ? input.split('\n') : ''; + this.type = e.type || 'Syntax'; + this.filename = filename; + this.index = e.index; + this.line = typeof line === 'number' ? line + 1 : null; + this.column = col; + + if (!this.line && this.stack) { + var found = this.stack.match(/(|Function):(\d+):(\d+)/); + + if (found) { + if (found[2]) { + this.line = parseInt(found[2]) - 2; + } - // Stylesheets in IE don't always return the full path - if (baseUrl && (!urlParts[1] || urlParts[2])) { - baseUrlParts = baseUrl.match(urlPartsRegex); - if (!baseUrlParts) { - throw new Error('Could not parse page url - \'' + baseUrl + '\''); - } - urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; - if (!urlParts[2]) { - urlParts[3] = baseUrlParts[3] + urlParts[3]; + if (found[3]) { + this.column = parseInt(found[3]); + } } + } + + this.callLine = callLine + 1; + this.callExtract = lines[callLine]; + this.extract = [lines[this.line - 2], lines[this.line - 1], lines[this.line]]; } + }; - if (urlParts[3]) { - rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); + if (typeof Object.create === 'undefined') { + var F = function F() {}; - // collapse '..' and skip '.' - for (i = 0; i < rawDirectories.length; i++) { + F.prototype = Error.prototype; + LessError.prototype = new F(); + } else { + LessError.prototype = Object.create(Error.prototype); + } - if (rawDirectories[i] === '..') { - directories.pop(); - } - else if (rawDirectories[i] !== '.') { - directories.push(rawDirectories[i]); - } - - } - } + LessError.prototype.constructor = LessError; + /** + * An overridden version of the default Object.prototype.toString + * which uses additional information to create a helpful message. + * + * @param {Object} options + * @returns {string} + */ + + LessError.prototype.toString = function () { + var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {}; + var message = ''; + var extract = this.extract || []; + var error = []; - returner.hostPart = urlParts[1]; - returner.directories = directories; - returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); - returner.path = (urlParts[1] || '') + directories.join('/'); - returner.filename = urlParts[4]; - returner.fileUrl = returner.path + (urlParts[4] || ''); - returner.url = returner.fileUrl + (urlParts[5] || ''); - return returner; -}; + var stylize = function stylize(str) { + return str; + }; -module.exports = abstractFileManager; + if (options.stylize) { + var type = _typeof(options.stylize); -},{}],19:[function(require,module,exports){ -var functionRegistry = require('../functions/function-registry'), - LessError = require('../less-error'); + if (type !== 'function') { + throw Error("options.stylize should be a function, got a ".concat(type, "!")); + } -var AbstractPluginLoader = function() { - // Implemented by Node.js plugin loader - this.require = function() { - return null; + stylize = options.stylize; } -}; - -AbstractPluginLoader.prototype.evalPlugin = function(contents, context, imports, pluginOptions, fileInfo) { - var loader, - registry, - pluginObj, - localModule, - pluginManager, - filename, - result; + if (this.line !== null) { + if (typeof extract[0] === 'string') { + error.push(stylize("".concat(this.line - 1, " ").concat(extract[0]), 'grey')); + } - pluginManager = context.pluginManager; + if (typeof extract[1] === 'string') { + var errorTxt = "".concat(this.line, " "); - if (fileInfo) { - if (typeof fileInfo === 'string') { - filename = fileInfo; - } - else { - filename = fileInfo.filename; + if (extract[1]) { + errorTxt += extract[1].slice(0, this.column) + stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') + extract[1].slice(this.column + 1), 'red'), 'inverse'); } - } - var shortname = (new this.less.FileManager()).extractUrlParts(filename).filename; - if (filename) { - pluginObj = pluginManager.get(filename); + error.push(errorTxt); + } - if (pluginObj) { - result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); - if (result) { - return result; - } - try { - if (pluginObj.use) { - pluginObj.use.call(this.context, pluginObj); - } - } - catch (e) { - e.message = e.message || 'Error during @plugin call'; - return new LessError(e, imports, filename); - } - return pluginObj; - } + if (typeof extract[2] === 'string') { + error.push(stylize("".concat(this.line + 1, " ").concat(extract[2]), 'grey')); + } + + error = "".concat(error.join('\n') + stylize('', 'reset'), "\n"); } - localModule = { - exports: {}, - pluginManager: pluginManager, - fileInfo: fileInfo - }; - registry = functionRegistry.create(); - var registerPlugin = function(obj) { - pluginObj = obj; - }; + message += stylize("".concat(this.type, "Error: ").concat(this.message), 'red'); - try { - loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents); - loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo); - } - catch (e) { - return new LessError(e, imports, filename); + if (this.filename) { + message += stylize(' in ', 'red') + this.filename; } - if (!pluginObj) { - pluginObj = localModule.exports; + if (this.line) { + message += stylize(" on line ".concat(this.line, ", column ").concat(this.column + 1, ":"), 'grey'); } - pluginObj = this.validatePlugin(pluginObj, filename, shortname); - if (pluginObj instanceof LessError) { - return pluginObj; + message += "\n".concat(error); + + if (this.callLine) { + message += "".concat(stylize('from ', 'red') + (this.filename || ''), "/n"); + message += "".concat(stylize(this.callLine, 'grey'), " ").concat(this.callExtract, "/n"); } - if (pluginObj) { - pluginObj.imports = imports; - pluginObj.filename = filename; + return message; + }; + + var Selector = + /*#__PURE__*/ + function (_Node) { + _inherits(Selector, _Node); - // For < 3.x (or unspecified minVersion) - setOptions() before install() - if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) { - result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + function Selector(elements, extendList, condition, index, currentFileInfo, visibilityInfo) { + var _this; - if (result) { - return result; - } + _classCallCheck(this, Selector); + + _this.extendList = extendList; + _this.condition = condition; + _this.evaldCondition = !condition; + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.elements = _this.getElements(elements); + _this.mixinElements_ = undefined; + + _this.copyVisibilityInfo(visibilityInfo); + + _this.setParent(_this.elements, _assertThisInitialized(_this)); + + return _possibleConstructorReturn(_this); + } + + _createClass(Selector, [{ + key: "accept", + value: function accept(visitor) { + if (this.elements) { + this.elements = visitor.visitArray(this.elements); } - // Run on first load - pluginManager.addPlugin(pluginObj, fileInfo.filename, registry); - pluginObj.functions = registry.getLocalFunctions(); + if (this.extendList) { + this.extendList = visitor.visitArray(this.extendList); + } - // Need to call setOptions again because the pluginObj might have functions - result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); - if (result) { - return result; + if (this.condition) { + this.condition = visitor.visit(this.condition); + } + } + }, { + key: "createDerived", + value: function createDerived(elements, extendList, evaldCondition) { + elements = this.getElements(elements); + var newSelector = new Selector(elements, extendList || this.extendList, null, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + newSelector.evaldCondition = evaldCondition != null ? evaldCondition : this.evaldCondition; + newSelector.mediaEmpty = this.mediaEmpty; + return newSelector; + } + }, { + key: "getElements", + value: function getElements(els) { + if (!els) { + return [new Element('', '&', false, this._index, this._fileInfo)]; } - // Run every @plugin call - try { - if (pluginObj.use) { - pluginObj.use.call(this.context, pluginObj); + if (typeof els === 'string') { + this.parse.parseNode(els, ['selector'], this._index, this._fileInfo, function (err, result) { + if (err) { + throw new LessError({ + index: err.index, + message: err.message + }, this.parse.imports, this._fileInfo.filename); } + + els = result[0].elements; + }); } - catch (e) { - e.message = e.message || 'Error during @plugin call'; - return new LessError(e, imports, filename); + + return els; + } + }, { + key: "createEmptySelectors", + value: function createEmptySelectors() { + var el = new Element('', '&', false, this._index, this._fileInfo); + var sels = [new Selector([el], null, null, this._index, this._fileInfo)]; + sels[0].mediaEmpty = true; + return sels; + } + }, { + key: "match", + value: function match(other) { + var elements = this.elements; + var len = elements.length; + var olen; + var i; + other = other.mixinElements(); + olen = other.length; + + if (olen === 0 || len < olen) { + return 0; + } else { + for (i = 0; i < olen; i++) { + if (elements[i].value !== other[i]) { + return 0; + } + } } - } - else { - return new LessError({ message: 'Not a valid plugin' }, imports, filename); - } + return olen; // return number of matched elements + } + }, { + key: "mixinElements", + value: function mixinElements() { + if (this.mixinElements_) { + return this.mixinElements_; + } - return pluginObj; + var elements = this.elements.map(function (v) { + return v.combinator.value + (v.value.value || v.value); + }).join('').match(/[,&#\*\.\w-]([\w-]|(\\.))*/g); -}; + if (elements) { + if (elements[0] === '&') { + elements.shift(); + } + } else { + elements = []; + } -AbstractPluginLoader.prototype.trySetOptions = function(plugin, filename, name, options) { - if (options && !plugin.setOptions) { - return new LessError({ - message: 'Options have been provided but the plugin ' + - name + ' does not support any options.' + return this.mixinElements_ = elements; + } + }, { + key: "isJustParentSelector", + value: function isJustParentSelector() { + return !this.mediaEmpty && this.elements.length === 1 && this.elements[0].value === '&' && (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === ''); + } + }, { + key: "eval", + value: function _eval(context) { + var evaldCondition = this.condition && this.condition.eval(context); + var elements = this.elements; + var extendList = this.extendList; + elements = elements && elements.map(function (e) { + return e.eval(context); }); - } - try { - plugin.setOptions && plugin.setOptions(options); - } - catch (e) { - return new LessError(e); - } -}; + extendList = extendList && extendList.map(function (extend) { + return extend.eval(context); + }); + return this.createDerived(elements, extendList, evaldCondition); + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + var i; + var element; -AbstractPluginLoader.prototype.validatePlugin = function(plugin, filename, name) { - if (plugin) { - // support plugins being a function - // so that the plugin can be more usable programmatically - if (typeof plugin === 'function') { - plugin = new plugin(); + if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') { + output.add(' ', this.fileInfo(), this.getIndex()); } - if (plugin.minVersion) { - if (this.compareVersion(plugin.minVersion, this.less.version) < 0) { - return new LessError({ - message: 'Plugin ' + name + ' requires version ' + - this.versionToString(plugin.minVersion) - }); - } + for (i = 0; i < this.elements.length; i++) { + element = this.elements[i]; + element.genCSS(context, output); } - return plugin; - } - return null; -}; + } + }, { + key: "getIsOutput", + value: function getIsOutput() { + return this.evaldCondition; + } + }]); + + return Selector; + }(Node); + + Selector.prototype.type = 'Selector'; + + var Value = + /*#__PURE__*/ + function (_Node) { + _inherits(Value, _Node); -AbstractPluginLoader.prototype.compareVersion = function(aVersion, bVersion) { - if (typeof aVersion === 'string') { - aVersion = aVersion.match(/^(\d+)\.?(\d+)?\.?(\d+)?/); - aVersion.shift(); + function Value(value) { + var _this; + + _classCallCheck(this, Value); + + if (!value) { + throw new Error('Value requires an array argument'); + } + + if (!Array.isArray(value)) { + _this.value = [value]; + } else { + _this.value = value; + } + + return _possibleConstructorReturn(_this); } - for (var i = 0; i < aVersion.length; i++) { - if (aVersion[i] !== bVersion[i]) { - return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1; + + _createClass(Value, [{ + key: "accept", + value: function accept(visitor) { + if (this.value) { + this.value = visitor.visitArray(this.value); } - } - return 0; -}; -AbstractPluginLoader.prototype.versionToString = function(version) { - var versionString = ''; - for (var i = 0; i < version.length; i++) { - versionString += (versionString ? '.' : '') + version[i]; - } - return versionString; -}; -AbstractPluginLoader.prototype.printUsage = function(plugins) { - for (var i = 0; i < plugins.length; i++) { - var plugin = plugins[i]; - if (plugin.printUsage) { - plugin.printUsage(); + } + }, { + key: "eval", + value: function _eval(context) { + if (this.value.length === 1) { + return this.value[0].eval(context); + } else { + return new Value(this.value.map(function (v) { + return v.eval(context); + })); } - } -}; + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + var i; -module.exports = AbstractPluginLoader; + for (i = 0; i < this.value.length; i++) { + this.value[i].genCSS(context, output); + if (i + 1 < this.value.length) { + output.add(context && context.compress ? ',' : ', '); + } + } + } + }]); -},{"../functions/function-registry":27,"../less-error":38}],20:[function(require,module,exports){ -/** - * @todo Document why this abstraction exists, and the relationship between - * environment, file managers, and plugin manager - */ + return Value; + }(Node); -var logger = require('../logger'); -var environment = function(externalEnvironment, fileManagers) { - this.fileManagers = fileManagers || []; - externalEnvironment = externalEnvironment || {}; + Value.prototype.type = 'Value'; - var optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator'], - requiredFunctions = [], - functions = requiredFunctions.concat(optionalFunctions); + var Keyword = + /*#__PURE__*/ + function (_Node) { + _inherits(Keyword, _Node); - for (var i = 0; i < functions.length; i++) { - var propName = functions[i], - environmentFunc = externalEnvironment[propName]; - if (environmentFunc) { - this[propName] = environmentFunc.bind(externalEnvironment); - } else if (i < requiredFunctions.length) { - this.warn('missing required function in environment - ' + propName); - } - } -}; + function Keyword(value) { + var _this; -environment.prototype.getFileManager = function (filename, currentDirectory, options, environment, isSync) { + _classCallCheck(this, Keyword); - if (!filename) { - logger.warn('getFileManager called with no filename.. Please report this issue. continuing.'); - } - if (currentDirectory == null) { - logger.warn('getFileManager called with null directory.. Please report this issue. continuing.'); + _this.value = value; + return _possibleConstructorReturn(_this); } - var fileManagers = this.fileManagers; - if (options.pluginManager) { - fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers()); - } - for (var i = fileManagers.length - 1; i >= 0 ; i--) { - var fileManager = fileManagers[i]; - if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) { - return fileManager; + _createClass(Keyword, [{ + key: "genCSS", + value: function genCSS(context, output) { + if (this.value === '%') { + throw { + type: 'Syntax', + message: 'Invalid % without number' + }; } - } - return null; -}; -environment.prototype.addFileManager = function (fileManager) { - this.fileManagers.push(fileManager); -}; + output.add(this.value); + } + }]); + + return Keyword; + }(Node); -environment.prototype.clearFileManagers = function () { - this.fileManagers = []; -}; + Keyword.prototype.type = 'Keyword'; + Keyword.True = new Keyword('true'); + Keyword.False = new Keyword('false'); -module.exports = environment; + var Anonymous = + /*#__PURE__*/ + function (_Node) { + _inherits(Anonymous, _Node); -},{"../logger":39}],21:[function(require,module,exports){ + function Anonymous(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) { + var _this; -var functionRegistry = require('./function-registry'), - Anonymous = require('../tree/anonymous'), - Keyword = require('../tree/keyword'); + _classCallCheck(this, Anonymous); -functionRegistry.addMultiple({ - boolean: function(condition) { - return condition ? Keyword.True : Keyword.False; - }, + _this.value = value; + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.mapLines = mapLines; + _this.rulesetLike = typeof rulesetLike === 'undefined' ? false : rulesetLike; + _this.allowRoot = true; + + _this.copyVisibilityInfo(visibilityInfo); - 'if': function(condition, trueValue, falseValue) { - return condition ? trueValue - : (falseValue || new Anonymous); + return _possibleConstructorReturn(_this); } -}); -},{"../tree/anonymous":50,"../tree/keyword":70,"./function-registry":27}],22:[function(require,module,exports){ -var Color = require('../tree/color'), - functionRegistry = require('./function-registry'); + _createClass(Anonymous, [{ + key: "eval", + value: function _eval() { + return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo()); + } + }, { + key: "compare", + value: function compare(other) { + return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; + } + }, { + key: "isRulesetLike", + value: function isRulesetLike() { + return this.rulesetLike; + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + this.nodeVisible = Boolean(this.value); -// Color Blending -// ref: http://www.w3.org/TR/compositing-1 + if (this.nodeVisible) { + output.add(this.value, this._fileInfo, this._index, this.mapLines); + } + } + }]); -function colorBlend(mode, color1, color2) { - var ab = color1.alpha, cb, // backdrop - as = color2.alpha, cs, // source - ar, cr, r = []; // result + return Anonymous; + }(Node); - ar = as + ab * (1 - as); - for (var i = 0; i < 3; i++) { - cb = color1.rgb[i] / 255; - cs = color2.rgb[i] / 255; - cr = mode(cb, cs); - if (ar) { - cr = (as * cs + ab * (cb - - as * (cb + cs - cr))) / ar; - } - r[i] = cr * 255; - } + Anonymous.prototype.type = 'Anonymous'; - return new Color(r, ar); -} + var MATH = Math$1; -var colorBlendModeFunctions = { - multiply: function(cb, cs) { - return cb * cs; - }, - screen: function(cb, cs) { - return cb + cs - cb * cs; - }, - overlay: function(cb, cs) { - cb *= 2; - return (cb <= 1) ? - colorBlendModeFunctions.multiply(cb, cs) : - colorBlendModeFunctions.screen(cb - 1, cs); - }, - softlight: function(cb, cs) { - var d = 1, e = cb; - if (cs > 0.5) { - e = 1; - d = (cb > 0.25) ? Math.sqrt(cb) - : ((16 * cb - 12) * cb + 4) * cb; - } - return cb - (1 - 2 * cs) * e * (d - cb); - }, - hardlight: function(cb, cs) { - return colorBlendModeFunctions.overlay(cs, cb); - }, - difference: function(cb, cs) { - return Math.abs(cb - cs); - }, - exclusion: function(cb, cs) { - return cb + cs - 2 * cb * cs; - }, + var Declaration = + /*#__PURE__*/ + function (_Node) { + _inherits(Declaration, _Node); - // non-w3c functions: - average: function(cb, cs) { - return (cb + cs) / 2; - }, - negation: function(cb, cs) { - return 1 - Math.abs(cb + cs - 1); - } -}; + function Declaration(name, value, important, merge, index, currentFileInfo, inline, variable) { + var _this; -for (var f in colorBlendModeFunctions) { - if (colorBlendModeFunctions.hasOwnProperty(f)) { - colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]); - } -} + _classCallCheck(this, Declaration); -functionRegistry.addMultiple(colorBlend); + _this.name = name; + _this.value = value instanceof Node ? value : new Value([value ? new Anonymous(value) : null]); + _this.important = important ? " ".concat(important.trim()) : ''; + _this.merge = merge; + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.inline = inline || false; + _this.variable = variable !== undefined ? variable : name.charAt && name.charAt(0) === '@'; + _this.allowRoot = true; -},{"../tree/color":55,"./function-registry":27}],23:[function(require,module,exports){ -var Dimension = require('../tree/dimension'), - Color = require('../tree/color'), - Quoted = require('../tree/quoted'), - Anonymous = require('../tree/anonymous'), - functionRegistry = require('./function-registry'), - colorFunctions; + _this.setParent(_this.value, _assertThisInitialized(_this)); -function clamp(val) { - return Math.min(1, Math.max(0, val)); -} -function hsla(origColor, hsl) { - var color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a); - if (color) { - if (origColor.value && - /^(rgb|hsl)/.test(origColor.value)) { - color.value = origColor.value; - } else { - color.value = 'rgb'; - } - return color; - } -} -function number(n) { - if (n instanceof Dimension) { - return parseFloat(n.unit.is('%') ? n.value / 100 : n.value); - } else if (typeof n === 'number') { - return n; - } else { - throw { - type: 'Argument', - message: 'color functions take numbers as parameters' - }; + return _possibleConstructorReturn(_this); } -} -function scaled(n, size) { - if (n instanceof Dimension && n.unit.is('%')) { - return parseFloat(n.value * size / 100); - } else { - return number(n); - } -} -colorFunctions = { - rgb: function (r, g, b) { - var color = colorFunctions.rgba(r, g, b, 1.0); - if (color) { - color.value = 'rgb'; - return color; - } - }, - rgba: function (r, g, b, a) { + + _createClass(Declaration, [{ + key: "genCSS", + value: function genCSS(context, output) { + output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex()); + try { - if (r instanceof Color) { - if (g) { - a = number(g); - } else { - a = r.alpha; - } - return new Color(r.rgb, a, 'rgba'); - } - var rgb = [r, g, b].map(function (c) { return scaled(c, 255); }); - a = number(a); - return new Color(rgb, a, 'rgba'); - } - catch (e) {} - }, - hsl: function (h, s, l) { - var color = colorFunctions.hsla(h, s, l, 1.0); - if (color) { - color.value = 'hsl'; - return color; + this.value.genCSS(context, output); + } catch (e) { + e.index = this._index; + e.filename = this._fileInfo.filename; + throw e; } - }, - hsla: function (h, s, l, a) { - try { - if (h instanceof Color) { - if (s) { - a = number(s); - } else { - a = h.alpha; - } - return new Color(h.rgb, a, 'hsla'); - } - var m1, m2; + output.add(this.important + (this.inline || context.lastRule && context.compress ? '' : ';'), this._fileInfo, this._index); + } + }, { + key: "eval", + value: function _eval(context) { + var mathBypass = false; + var prevMath; + var name = this.name; + var evaldValue; + var variable = this.variable; - function hue(h) { - h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h); - if (h * 6 < 1) { - return m1 + (m2 - m1) * h * 6; - } - else if (h * 2 < 1) { - return m2; - } - else if (h * 3 < 2) { - return m1 + (m2 - m1) * (2 / 3 - h) * 6; - } - else { - return m1; - } - } + if (typeof name !== 'string') { + // expand 'primitive' name directly to get + // things faster (~10% for benchmark.less): + name = name.length === 1 && name[0] instanceof Keyword ? name[0].value : evalName(context, name); + variable = false; // never treat expanded interpolation as new variable name + } // @todo remove when parens-division is default - h = (number(h) % 360) / 360; - s = clamp(number(s)); l = clamp(number(l)); a = clamp(number(a)); - m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s; - m1 = l * 2 - m2; - - var rgb = [ - hue(h + 1 / 3) * 255, - hue(h) * 255, - hue(h - 1 / 3) * 255 - ]; - a = number(a); - return new Color(rgb, a, 'hsla'); + if (name === 'font' && context.math === MATH.ALWAYS) { + mathBypass = true; + prevMath = context.math; + context.math = MATH.PARENS_DIVISION; } - catch (e) {} - }, - hsv: function(h, s, v) { - return colorFunctions.hsva(h, s, v, 1.0); - }, + try { + context.importantScope.push({}); + evaldValue = this.value.eval(context); + + if (!this.variable && evaldValue.type === 'DetachedRuleset') { + throw { + message: 'Rulesets cannot be evaluated on a property.', + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } - hsva: function(h, s, v, a) { - h = ((number(h) % 360) / 360) * 360; - s = number(s); v = number(v); a = number(a); - - var i, f; - i = Math.floor((h / 60) % 6); - f = (h / 60) - i; - - var vs = [v, - v * (1 - s), - v * (1 - f * s), - v * (1 - (1 - f) * s)]; - var perm = [[0, 3, 1], - [2, 0, 1], - [1, 0, 3], - [1, 2, 0], - [3, 1, 0], - [0, 1, 2]]; - - return colorFunctions.rgba(vs[perm[i][0]] * 255, - vs[perm[i][1]] * 255, - vs[perm[i][2]] * 255, - a); - }, + var important = this.important; + var importantResult = context.importantScope.pop(); - hue: function (color) { - return new Dimension(color.toHSL().h); - }, - saturation: function (color) { - return new Dimension(color.toHSL().s * 100, '%'); - }, - lightness: function (color) { - return new Dimension(color.toHSL().l * 100, '%'); - }, - hsvhue: function(color) { - return new Dimension(color.toHSV().h); - }, - hsvsaturation: function (color) { - return new Dimension(color.toHSV().s * 100, '%'); - }, - hsvvalue: function (color) { - return new Dimension(color.toHSV().v * 100, '%'); - }, - red: function (color) { - return new Dimension(color.rgb[0]); - }, - green: function (color) { - return new Dimension(color.rgb[1]); - }, - blue: function (color) { - return new Dimension(color.rgb[2]); - }, - alpha: function (color) { - return new Dimension(color.toHSL().a); - }, - luma: function (color) { - return new Dimension(color.luma() * color.alpha * 100, '%'); - }, - luminance: function (color) { - var luminance = - (0.2126 * color.rgb[0] / 255) + - (0.7152 * color.rgb[1] / 255) + - (0.0722 * color.rgb[2] / 255); + if (!important && importantResult.important) { + important = importantResult.important; + } - return new Dimension(luminance * color.alpha * 100, '%'); - }, - saturate: function (color, amount, method) { - // filter: saturate(3.2); - // should be kept as is, so check for color - if (!color.rgb) { - return null; - } - var hsl = color.toHSL(); + return new Declaration(name, evaldValue, important, this.merge, this.getIndex(), this.fileInfo(), this.inline, variable); + } catch (e) { + if (typeof e.index !== 'number') { + e.index = this.getIndex(); + e.filename = this.fileInfo().filename; + } - if (typeof method !== 'undefined' && method.value === 'relative') { - hsl.s += hsl.s * amount.value / 100; - } - else { - hsl.s += amount.value / 100; + throw e; + } finally { + if (mathBypass) { + context.math = prevMath; + } } - hsl.s = clamp(hsl.s); - return hsla(color, hsl); - }, - desaturate: function (color, amount, method) { - var hsl = color.toHSL(); + } + }, { + key: "makeImportant", + value: function makeImportant() { + return new Declaration(this.name, this.value, '!important', this.merge, this.getIndex(), this.fileInfo(), this.inline); + } + }]); - if (typeof method !== 'undefined' && method.value === 'relative') { - hsl.s -= hsl.s * amount.value / 100; - } - else { - hsl.s -= amount.value / 100; - } - hsl.s = clamp(hsl.s); - return hsla(color, hsl); - }, - lighten: function (color, amount, method) { - var hsl = color.toHSL(); + return Declaration; + }(Node); - if (typeof method !== 'undefined' && method.value === 'relative') { - hsl.l += hsl.l * amount.value / 100; - } - else { - hsl.l += amount.value / 100; - } - hsl.l = clamp(hsl.l); - return hsla(color, hsl); - }, - darken: function (color, amount, method) { - var hsl = color.toHSL(); + function evalName(context, name) { + var value = ''; + var i; + var n = name.length; + var output = { + add: function add(s) { + value += s; + } + }; - if (typeof method !== 'undefined' && method.value === 'relative') { - hsl.l -= hsl.l * amount.value / 100; - } - else { - hsl.l -= amount.value / 100; - } - hsl.l = clamp(hsl.l); - return hsla(color, hsl); - }, - fadein: function (color, amount, method) { - var hsl = color.toHSL(); + for (i = 0; i < n; i++) { + name[i].eval(context).genCSS(context, output); + } - if (typeof method !== 'undefined' && method.value === 'relative') { - hsl.a += hsl.a * amount.value / 100; - } - else { - hsl.a += amount.value / 100; - } - hsl.a = clamp(hsl.a); - return hsla(color, hsl); - }, - fadeout: function (color, amount, method) { - var hsl = color.toHSL(); + return value; + } - if (typeof method !== 'undefined' && method.value === 'relative') { - hsl.a -= hsl.a * amount.value / 100; - } - else { - hsl.a -= amount.value / 100; - } - hsl.a = clamp(hsl.a); - return hsla(color, hsl); - }, - fade: function (color, amount) { - var hsl = color.toHSL(); + Declaration.prototype.type = 'Declaration'; - hsl.a = amount.value / 100; - hsl.a = clamp(hsl.a); - return hsla(color, hsl); - }, - spin: function (color, amount) { - var hsl = color.toHSL(); - var hue = (hsl.h + amount.value) % 360; + var debugInfo = function debugInfo(context, ctx, lineSeparator) { + var result = ''; - hsl.h = hue < 0 ? 360 + hue : hue; + if (context.dumpLineNumbers && !context.compress) { + switch (context.dumpLineNumbers) { + case 'comments': + result = debugInfo.asComment(ctx); + break; - return hsla(color, hsl); - }, - // - // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein - // http://sass-lang.com - // - mix: function (color1, color2, weight) { - if (!color1.toHSL || !color2.toHSL) { - console.log(color2.type); - console.dir(color2); - } - if (!weight) { - weight = new Dimension(50); - } - var p = weight.value / 100.0; - var w = p * 2 - 1; - var a = color1.toHSL().a - color2.toHSL().a; + case 'mediaquery': + result = debugInfo.asMediaQuery(ctx); + break; - var w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0; - var w2 = 1 - w1; + case 'all': + result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx); + break; + } + } - var rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2, - color1.rgb[1] * w1 + color2.rgb[1] * w2, - color1.rgb[2] * w1 + color2.rgb[2] * w2]; + return result; + }; - var alpha = color1.alpha * p + color2.alpha * (1 - p); + debugInfo.asComment = function (ctx) { + return "/* line ".concat(ctx.debugInfo.lineNumber, ", ").concat(ctx.debugInfo.fileName, " */\n"); + }; - return new Color(rgb, alpha); - }, - greyscale: function (color) { - return colorFunctions.desaturate(color, new Dimension(100)); - }, - contrast: function (color, dark, light, threshold) { - // filter: contrast(3.2); - // should be kept as is, so check for color - if (!color.rgb) { - return null; - } - if (typeof light === 'undefined') { - light = colorFunctions.rgba(255, 255, 255, 1.0); - } - if (typeof dark === 'undefined') { - dark = colorFunctions.rgba(0, 0, 0, 1.0); - } - // Figure out which is actually light and dark: - if (dark.luma() > light.luma()) { - var t = light; - light = dark; - dark = t; - } - if (typeof threshold === 'undefined') { - threshold = 0.43; - } else { - threshold = number(threshold); - } - if (color.luma() < threshold) { - return light; - } else { - return dark; - } - }, - // Changes made in 2.7.0 - Reverted in 3.0.0 - // contrast: function (color, color1, color2, threshold) { - // // Return which of `color1` and `color2` has the greatest contrast with `color` - // // according to the standard WCAG contrast ratio calculation. - // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef - // // The threshold param is no longer used, in line with SASS. - // // filter: contrast(3.2); - // // should be kept as is, so check for color - // if (!color.rgb) { - // return null; - // } - // if (typeof color1 === 'undefined') { - // color1 = colorFunctions.rgba(0, 0, 0, 1.0); - // } - // if (typeof color2 === 'undefined') { - // color2 = colorFunctions.rgba(255, 255, 255, 1.0); - // } - // var contrast1, contrast2; - // var luma = color.luma(); - // var luma1 = color1.luma(); - // var luma2 = color2.luma(); - // // Calculate contrast ratios for each color - // if (luma > luma1) { - // contrast1 = (luma + 0.05) / (luma1 + 0.05); - // } else { - // contrast1 = (luma1 + 0.05) / (luma + 0.05); - // } - // if (luma > luma2) { - // contrast2 = (luma + 0.05) / (luma2 + 0.05); - // } else { - // contrast2 = (luma2 + 0.05) / (luma + 0.05); - // } - // if (contrast1 > contrast2) { - // return color1; - // } else { - // return color2; - // } - // }, - argb: function (color) { - return new Anonymous(color.toARGB()); - }, - color: function(c) { - if ((c instanceof Quoted) && - (/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value))) { - var val = c.value.slice(1); - return new Color(val, undefined, '#' + val); - } - if ((c instanceof Color) || (c = Color.fromKeyword(c.value))) { - c.value = undefined; - return c; - } - throw { - type: 'Argument', - message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF' - }; - }, - tint: function(color, amount) { - return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount); - }, - shade: function(color, amount) { - return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount); - } -}; -functionRegistry.addMultiple(colorFunctions); - -},{"../tree/anonymous":50,"../tree/color":55,"../tree/dimension":62,"../tree/quoted":80,"./function-registry":27}],24:[function(require,module,exports){ -module.exports = function(environment) { - var Quoted = require('../tree/quoted'), - URL = require('../tree/url'), - utils = require('../utils'), - functionRegistry = require('./function-registry'), - fallback = function(functionThis, node) { - return new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); - }, - logger = require('../logger'); + debugInfo.asMediaQuery = function (ctx) { + var filenameWithProtocol = ctx.debugInfo.fileName; - functionRegistry.add('data-uri', function(mimetypeNode, filePathNode) { + if (!/^[a-z]+:\/\//i.test(filenameWithProtocol)) { + filenameWithProtocol = "file://".concat(filenameWithProtocol); + } - if (!filePathNode) { - filePathNode = mimetypeNode; - mimetypeNode = null; - } + return "@media -sass-debug-info{filename{font-family:".concat(filenameWithProtocol.replace(/([.:\/\\])/g, function (a) { + if (a == '\\') { + a = '\/'; + } - var mimetype = mimetypeNode && mimetypeNode.value; - var filePath = filePathNode.value; - var currentFileInfo = this.currentFileInfo; - var currentDirectory = currentFileInfo.rewriteUrls ? - currentFileInfo.currentDirectory : currentFileInfo.entryPath; + return "\\".concat(a); + }), "}line{font-family:\\00003").concat(ctx.debugInfo.lineNumber, "}}\n"); + }; - var fragmentStart = filePath.indexOf('#'); - var fragment = ''; - if (fragmentStart !== -1) { - fragment = filePath.slice(fragmentStart); - filePath = filePath.slice(0, fragmentStart); - } - var context = utils.clone(this.context); - context.rawBuffer = true; + var Comment = + /*#__PURE__*/ + function (_Node) { + _inherits(Comment, _Node); - var fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true); + function Comment(value, isLineComment, index, currentFileInfo) { + var _this; - if (!fileManager) { - return fallback(this, filePathNode); + _classCallCheck(this, Comment); + + _this.value = value; + _this.isLineComment = isLineComment; + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.allowRoot = true; + return _possibleConstructorReturn(_this); + } + + _createClass(Comment, [{ + key: "genCSS", + value: function genCSS(context, output) { + if (this.debugInfo) { + output.add(debugInfo(context, this), this.fileInfo(), this.getIndex()); } - var useBase64 = false; + output.add(this.value); + } + }, { + key: "isSilent", + value: function isSilent(context) { + var isCompressed = context.compress && this.value[2] !== '!'; + return this.isLineComment || isCompressed; + } + }]); - // detect the mimetype if not given - if (!mimetypeNode) { + return Comment; + }(Node); - mimetype = environment.mimeLookup(filePath); + Comment.prototype.type = 'Comment'; - if (mimetype === 'image/svg+xml') { - useBase64 = false; - } else { - // use base 64 unless it's an ASCII or UTF-8 format - var charset = environment.charsetLookup(mimetype); - useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0; - } - if (useBase64) { mimetype += ';base64'; } - } - else { - useBase64 = /;base64$/.test(mimetype); - } + var contexts = {}; - var fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment); - if (!fileSync.contents) { - logger.warn('Skipped data-uri embedding of ' + filePath + ' because file not found'); - return fallback(this, filePathNode || mimetypeNode); - } - var buf = fileSync.contents; - if (useBase64 && !environment.encodeBase64) { - return fallback(this, filePathNode); - } + var copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) { + if (!original) { + return; + } - buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf); + for (var i = 0; i < propertiesToCopy.length; i++) { + if (original.hasOwnProperty(propertiesToCopy[i])) { + destination[propertiesToCopy[i]] = original[propertiesToCopy[i]]; + } + } + }; + /* + parse is used whilst parsing + */ + + + var parseCopyProperties = [// options + 'paths', // option - unmodified - paths to search for imports on + 'rewriteUrls', // option - whether to adjust URL's to be relative + 'rootpath', // option - rootpath to append to URL's + 'strictImports', // option - + 'insecure', // option - whether to allow imports from insecure ssl hosts + 'dumpLineNumbers', // option - whether to dump line numbers + 'compress', // option - whether to compress + 'syncImport', // option - whether to import synchronously + 'chunkInput', // option - whether to chunk input. more performant but causes parse issues. + 'mime', // browser only - mime type for sheet import + 'useFileCache', // browser only - whether to use the per file session cache + // context + 'processImports', // option & context - whether to process imports. if false then imports will not be imported. + // Used by the import manager to stop multiple import visitors being created. + 'pluginManager' // Used as the plugin manager for the session + ]; + + contexts.Parse = function (options) { + copyFromOriginal(options, this, parseCopyProperties); - var uri = 'data:' + mimetype + ',' + buf + fragment; + if (typeof this.paths === 'string') { + this.paths = [this.paths]; + } + }; + + var evalCopyProperties = ['paths', // additional include paths + 'compress', // whether to compress + 'ieCompat', // whether to enforce IE compatibility (IE8 data-uri) + 'math', // whether math has to be within parenthesis + 'strictUnits', // whether units need to evaluate correctly + 'sourceMap', // whether to output a source map + 'importMultiple', // whether we are currently importing multiple copies + 'urlArgs', // whether to add args into url tokens + 'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false + 'pluginManager', // Used as the plugin manager for the session + 'importantScope', // used to bubble up !important statements + 'rewriteUrls' // option - whether to adjust URL's to be relative + ]; + + contexts.Eval = function (options, frames) { + copyFromOriginal(options, this, evalCopyProperties); - // IE8 cannot handle a data-uri larger than 32,768 characters. If this is exceeded - // and the --ieCompat flag is enabled, return a normal url() instead. - var DATA_URI_MAX = 32768; - if (uri.length >= DATA_URI_MAX) { + if (typeof this.paths === 'string') { + this.paths = [this.paths]; + } - if (this.context.ieCompat !== false) { - logger.warn('Skipped data-uri embedding of ' + filePath + ' because its size (' + uri.length + - ' characters) exceeds IE8-safe ' + DATA_URI_MAX + ' characters!'); + this.frames = frames || []; + this.importantScope = this.importantScope || []; + }; - return fallback(this, filePathNode || mimetypeNode); - } - } + contexts.Eval.prototype.enterCalc = function () { + if (!this.calcStack) { + this.calcStack = []; + } - return new URL(new Quoted('"' + uri + '"', uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); - }); -}; + this.calcStack.push(true); + this.inCalc = true; + }; -},{"../logger":39,"../tree/quoted":80,"../tree/url":85,"../utils":89,"./function-registry":27}],25:[function(require,module,exports){ -var Keyword = require('../tree/keyword'), - functionRegistry = require('./function-registry'); + contexts.Eval.prototype.exitCalc = function () { + this.calcStack.pop(); -var defaultFunc = { - eval: function () { - var v = this.value_, e = this.error_; - if (e) { - throw e; - } - if (v != null) { - return v ? Keyword.True : Keyword.False; - } - }, - value: function (v) { - this.value_ = v; - }, - error: function (e) { - this.error_ = e; - }, - reset: function () { - this.value_ = this.error_ = null; + if (!this.calcStack) { + this.inCalc = false; } -}; + }; -functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc)); + contexts.Eval.prototype.inParenthesis = function () { + if (!this.parensStack) { + this.parensStack = []; + } -module.exports = defaultFunc; + this.parensStack.push(true); + }; -},{"../tree/keyword":70,"./function-registry":27}],26:[function(require,module,exports){ -var Expression = require('../tree/expression'); + contexts.Eval.prototype.outOfParenthesis = function () { + this.parensStack.pop(); + }; -var functionCaller = function(name, context, index, currentFileInfo) { - this.name = name.toLowerCase(); - this.index = index; - this.context = context; - this.currentFileInfo = currentFileInfo; + contexts.Eval.prototype.inCalc = false; + contexts.Eval.prototype.mathOn = true; - this.func = context.frames[0].functionRegistry.get(this.name); -}; -functionCaller.prototype.isValid = function() { - return Boolean(this.func); -}; + contexts.Eval.prototype.isMathOn = function (op) { + if (!this.mathOn) { + return false; + } -functionCaller.prototype.call = function(args) { - // This code is terrible and should be replaced as per this issue... - // https://github.com/less/less.js/issues/2477 - if (Array.isArray(args)) { - args = args.filter(function (item) { - if (item.type === 'Comment') { - return false; - } - return true; - }) - .map(function(item) { - if (item.type === 'Expression') { - var subNodes = item.value.filter(function (item) { - if (item.type === 'Comment') { - return false; - } - return true; - }); - if (subNodes.length === 1) { - return subNodes[0]; - } else { - return new Expression(subNodes); - } - } - return item; - }); + if (op === '/' && this.math !== Math$1.ALWAYS && (!this.parensStack || !this.parensStack.length)) { + return false; } - return this.func.apply(this, args); -}; + if (this.math > Math$1.PARENS_DIVISION) { + return this.parensStack && this.parensStack.length; + } -module.exports = functionCaller; + return true; + }; -},{"../tree/expression":64}],27:[function(require,module,exports){ -function makeRegistry( base ) { - return { - _data: {}, - add: function(name, func) { - // precautionary case conversion, as later querying of - // the registry by function-caller uses lower case as well. - name = name.toLowerCase(); + contexts.Eval.prototype.pathRequiresRewrite = function (path) { + var isRelative = this.rewriteUrls === RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; + return isRelative(path); + }; - if (this._data.hasOwnProperty(name)) { - // TODO warn - } - this._data[name] = func; - }, - addMultiple: function(functions) { - Object.keys(functions).forEach( - function(name) { - this.add(name, functions[name]); - }.bind(this)); - }, - get: function(name) { - return this._data[name] || ( base && base.get( name )); - }, - getLocalFunctions: function() { - return this._data; - }, - inherit: function() { - return makeRegistry( this ); - }, - create: function(base) { - return makeRegistry(base); - } - }; -} + contexts.Eval.prototype.rewritePath = function (path, rootpath) { + var newPath; + rootpath = rootpath || ''; + newPath = this.normalizePath(rootpath + path); // If a path was explicit relative and the rootpath was not an absolute path + // we must ensure that the new path is also explicit relative. -module.exports = makeRegistry( null ); -},{}],28:[function(require,module,exports){ -module.exports = function(environment) { - var functions = { - functionRegistry: require('./function-registry'), - functionCaller: require('./function-caller') - }; + if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { + newPath = "./".concat(newPath); + } - // register functions - require('./boolean'); - require('./default'); - require('./color'); - require('./color-blending'); - require('./data-uri')(environment); - require('./list'); - require('./math'); - require('./number'); - require('./string'); - require('./svg')(environment); - require('./types'); + return newPath; + }; - return functions; -}; - -},{"./boolean":21,"./color":23,"./color-blending":22,"./data-uri":24,"./default":25,"./function-caller":26,"./function-registry":27,"./list":29,"./math":31,"./number":32,"./string":33,"./svg":34,"./types":35}],29:[function(require,module,exports){ -var Comment = require('../tree/comment'), - Dimension = require('../tree/dimension'), - Declaration = require('../tree/declaration'), - Expression = require('../tree/expression'), - Ruleset = require('../tree/ruleset'), - Selector = require('../tree/selector'), - Element = require('../tree/element'), - functionRegistry = require('./function-registry'); - -var getItemsFromNode = function(node) { - // handle non-array values as an array of length 1 - // return 'undefined' if index is invalid - var items = Array.isArray(node.value) ? - node.value : Array(node); + contexts.Eval.prototype.normalizePath = function (path) { + var segments = path.split('/').reverse(); + var segment; + path = []; - return items; -}; + while (segments.length !== 0) { + segment = segments.pop(); -functionRegistry.addMultiple({ - _SELF: function(n) { - return n; - }, - extract: function(values, index) { - index = index.value - 1; // (1-based index) + switch (segment) { + case '.': + break; - return getItemsFromNode(values)[index]; - }, - length: function(values) { - return new Dimension(getItemsFromNode(values).length); - }, - /** - * Creates a Less list of incremental values. - * Modeled after Lodash's range function, also exists natively in PHP - * - * @param {Dimension} [start=1] - * @param {Dimension} end - e.g. 10 or 10px - unit is added to output - * @param {Dimension} [step=1] - */ - range: function(start, end, step) { - var from, to, stepValue = 1, list = []; - if (end) { - to = end; - from = start.value; - if (step) { - stepValue = step.value; - } - } - else { - from = 1; - to = start; - } + case '..': + if (path.length === 0 || path[path.length - 1] === '..') { + path.push(segment); + } else { + path.pop(); + } - for (var i = from; i <= to.value; i += stepValue) { - list.push(new Dimension(i, to.unit)); - } + break; - return new Expression(list); - }, - each: function(list, rs) { - var rules = [], newRules, iterator; + default: + path.push(segment); + break; + } + } - if (list.value) { - if (Array.isArray(list.value)) { - iterator = list.value; - } else { - iterator = [list.value]; - } - } else if (list.ruleset) { - iterator = list.ruleset.rules; - } else if (list.rules) { - iterator = list.rules; - } else if (Array.isArray(list)) { - iterator = list; - } else { - iterator = [list]; - } - - var valueName = '@value', - keyName = '@key', - indexName = '@index'; - - if (rs.params) { - valueName = rs.params[0] && rs.params[0].name; - keyName = rs.params[1] && rs.params[1].name; - indexName = rs.params[2] && rs.params[2].name; - rs = rs.rules; - } else { - rs = rs.ruleset; - } + return path.join('/'); + }; - for (var i = 0; i < iterator.length; i++) { - var key, value, item = iterator[i]; - if (item instanceof Declaration) { - key = typeof item.name === 'string' ? item.name : item.name[0].value; - value = item.value; - } else { - key = new Dimension(i + 1); - value = item; - } - - if (item instanceof Comment) { - continue; - } + function isPathRelative(path) { + return !/^(?:[a-z-]+:|\/|#)/i.test(path); + } - newRules = rs.rules.slice(0); - if (valueName) { - newRules.push(new Declaration(valueName, - value, - false, false, this.index, this.currentFileInfo)); - } - if (indexName) { - newRules.push(new Declaration(indexName, - new Dimension(i + 1), - false, false, this.index, this.currentFileInfo)); - } - if (keyName) { - newRules.push(new Declaration(keyName, - key, - false, false, this.index, this.currentFileInfo)); - } - - rules.push(new Ruleset([ new(Selector)([ new Element("", '&') ]) ], - newRules, - rs.strictImports, - rs.visibilityInfo() - )); - } + function isPathLocalRelative(path) { + return path.charAt(0) === '.'; + } // todo - do the same for the toCSS ? - return new Ruleset([ new(Selector)([ new Element("", '&') ]) ], - rules, - rs.strictImports, - rs.visibilityInfo() - ).eval(this.context); + function makeRegistry(base) { + return { + _data: {}, + add: function add(name, func) { + // precautionary case conversion, as later querying of + // the registry by function-caller uses lower case as well. + name = name.toLowerCase(); - } -}); + if (this._data.hasOwnProperty(name)) ; -},{"../tree/comment":57,"../tree/declaration":60,"../tree/dimension":62,"../tree/element":63,"../tree/expression":64,"../tree/ruleset":81,"../tree/selector":82,"./function-registry":27}],30:[function(require,module,exports){ -var Dimension = require('../tree/dimension'); + this._data[name] = func; + }, + addMultiple: function addMultiple(functions) { + var _this = this; -var MathHelper = function() { -}; -MathHelper._math = function (fn, unit, n) { - if (!(n instanceof Dimension)) { - throw { type: 'Argument', message: 'argument must be a number' }; - } - if (unit == null) { - unit = n.unit; - } else { - n = n.unify(); - } - return new Dimension(fn(parseFloat(n.value)), unit); -}; -module.exports = MathHelper; -},{"../tree/dimension":62}],31:[function(require,module,exports){ -var functionRegistry = require('./function-registry'), - mathHelper = require('./math-helper.js'); + Object.keys(functions).forEach(function (name) { + _this.add(name, functions[name]); + }); + }, + get: function get(name) { + return this._data[name] || base && base.get(name); + }, + getLocalFunctions: function getLocalFunctions() { + return this._data; + }, + inherit: function inherit() { + return makeRegistry(this); + }, + create: function create(base) { + return makeRegistry(base); + } + }; + } -var mathFunctions = { - // name, unit - ceil: null, - floor: null, - sqrt: null, - abs: null, - tan: '', - sin: '', - cos: '', - atan: 'rad', - asin: 'rad', - acos: 'rad' -}; - -for (var f in mathFunctions) { - if (mathFunctions.hasOwnProperty(f)) { - mathFunctions[f] = mathHelper._math.bind(null, Math[f], mathFunctions[f]); - } -} - -mathFunctions.round = function (n, f) { - var fraction = typeof f === 'undefined' ? 0 : f.value; - return mathHelper._math(function(num) { return num.toFixed(fraction); }, null, n); -}; + var functionRegistry = makeRegistry(null); -functionRegistry.addMultiple(mathFunctions); + var defaultFunc = { + eval: function _eval() { + var v = this.value_; + var e = this.error_; -},{"./function-registry":27,"./math-helper.js":30}],32:[function(require,module,exports){ -var Dimension = require('../tree/dimension'), - Anonymous = require('../tree/anonymous'), - functionRegistry = require('./function-registry'), - mathHelper = require('./math-helper.js'); + if (e) { + throw e; + } -var minMax = function (isMin, args) { - args = Array.prototype.slice.call(args); - switch (args.length) { - case 0: throw { type: 'Argument', message: 'one or more arguments required' }; - } - var i, j, current, currentUnified, referenceUnified, unit, unitStatic, unitClone, - order = [], // elems only contains original argument values. - values = {}; // key is the unit.toString() for unified Dimension values, - // value is the index into the order array. - for (i = 0; i < args.length; i++) { - current = args[i]; - if (!(current instanceof Dimension)) { - if (Array.isArray(args[i].value)) { - Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value)); - } - continue; - } - currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify(); - unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString(); - unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic; - unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone; - j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit]; - if (j === undefined) { - if (unitStatic !== undefined && unit !== unitStatic) { - throw { type: 'Argument', message: 'incompatible types' }; - } - values[unit] = order.length; - order.push(current); - continue; - } - referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify(); - if ( isMin && currentUnified.value < referenceUnified.value || - !isMin && currentUnified.value > referenceUnified.value) { - order[j] = current; - } - } - if (order.length == 1) { - return order[0]; - } - args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', '); - return new Anonymous((isMin ? 'min' : 'max') + '(' + args + ')'); -}; -functionRegistry.addMultiple({ - min: function () { - return minMax(true, arguments); - }, - max: function () { - return minMax(false, arguments); - }, - convert: function (val, unit) { - return val.convertTo(unit.value); + if (v != null) { + return v ? Keyword.True : Keyword.False; + } }, - pi: function () { - return new Dimension(Math.PI); + value: function value(v) { + this.value_ = v; }, - mod: function(a, b) { - return new Dimension(a.value % b.value, a.unit); + error: function error(e) { + this.error_ = e; }, - pow: function(x, y) { - if (typeof x === 'number' && typeof y === 'number') { - x = new Dimension(x); - y = new Dimension(y); - } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) { - throw { type: 'Argument', message: 'arguments must be numbers' }; - } + reset: function reset() { + this.value_ = this.error_ = null; + } + }; + var defaultFunc$1 = { + 'default': defaultFunc.eval.bind(defaultFunc) + }; - return new Dimension(Math.pow(x.value, y.value), x.unit); - }, - percentage: function (n) { - var result = mathHelper._math(function(num) { - return num * 100; - }, '%', n); + var Ruleset = + /*#__PURE__*/ + function (_Node) { + _inherits(Ruleset, _Node); - return result; - } -}); + function Ruleset(selectors, rules, strictImports, visibilityInfo) { + var _this; -},{"../tree/anonymous":50,"../tree/dimension":62,"./function-registry":27,"./math-helper.js":30}],33:[function(require,module,exports){ -var Quoted = require('../tree/quoted'), - Anonymous = require('../tree/anonymous'), - JavaScript = require('../tree/javascript'), - functionRegistry = require('./function-registry'); + _classCallCheck(this, Ruleset); -functionRegistry.addMultiple({ - e: function (str) { - return new Anonymous(str instanceof JavaScript ? str.evaluated : str.value); - }, - escape: function (str) { - return new Anonymous( - encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B') - .replace(/\(/g, '%28').replace(/\)/g, '%29')); - }, - replace: function (string, pattern, replacement, flags) { - var result = string.value; - replacement = (replacement.type === 'Quoted') ? - replacement.value : replacement.toCSS(); - result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement); - return new Quoted(string.quote || '', result, string.escaped); - }, - '%': function (string /* arg, arg, ... */) { - var args = Array.prototype.slice.call(arguments, 1), - result = string.value; + _this.selectors = selectors; + _this.rules = rules; + _this._lookups = {}; + _this._variables = null; + _this._properties = null; + _this.strictImports = strictImports; - for (var i = 0; i < args.length; i++) { - /* jshint loopfunc:true */ - result = result.replace(/%[sda]/i, function(token) { - var value = ((args[i].type === 'Quoted') && - token.match(/s/i)) ? args[i].value : args[i].toCSS(); - return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value; - }); - } - result = result.replace(/%%/g, '%'); - return new Quoted(string.quote || '', result, string.escaped); - } -}); + _this.copyVisibilityInfo(visibilityInfo); -},{"../tree/anonymous":50,"../tree/javascript":68,"../tree/quoted":80,"./function-registry":27}],34:[function(require,module,exports){ -module.exports = function(environment) { - var Dimension = require('../tree/dimension'), - Color = require('../tree/color'), - Expression = require('../tree/expression'), - Quoted = require('../tree/quoted'), - URL = require('../tree/url'), - functionRegistry = require('./function-registry'); + _this.allowRoot = true; - functionRegistry.add('svg-gradient', function(direction) { + _this.setParent(_this.selectors, _assertThisInitialized(_this)); - var stops, - gradientDirectionSvg, - gradientType = 'linear', - rectangleDimension = 'x="0" y="0" width="1" height="1"', - renderEnv = {compress: false}, - returner, - directionValue = direction.toCSS(renderEnv), - i, color, position, positionValue, alpha; + _this.setParent(_this.rules, _assertThisInitialized(_this)); - function throwArgumentDescriptor() { - throw { type: 'Argument', - message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' + - ' end_color [end_position] or direction, color list' }; - } + return _possibleConstructorReturn(_this); + } - if (arguments.length == 2) { - if (arguments[1].value.length < 2) { - throwArgumentDescriptor(); - } - stops = arguments[1].value; - } else if (arguments.length < 3) { - throwArgumentDescriptor(); - } else { - stops = Array.prototype.slice.call(arguments, 1); + _createClass(Ruleset, [{ + key: "isRulesetLike", + value: function isRulesetLike() { + return true; + } + }, { + key: "accept", + value: function accept(visitor) { + if (this.paths) { + this.paths = visitor.visitArray(this.paths, true); + } else if (this.selectors) { + this.selectors = visitor.visitArray(this.selectors); } - switch (directionValue) { - case 'to bottom': - gradientDirectionSvg = 'x1="0%" y1="0%" x2="0%" y2="100%"'; - break; - case 'to right': - gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="0%"'; - break; - case 'to bottom right': - gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="100%"'; - break; - case 'to top right': - gradientDirectionSvg = 'x1="0%" y1="100%" x2="100%" y2="0%"'; - break; - case 'ellipse': - case 'ellipse at center': - gradientType = 'radial'; - gradientDirectionSvg = 'cx="50%" cy="50%" r="75%"'; - rectangleDimension = 'x="-50" y="-50" width="101" height="101"'; - break; - default: - throw { type: 'Argument', message: 'svg-gradient direction must be \'to bottom\', \'to right\',' + - ' \'to bottom right\', \'to top right\' or \'ellipse at center\'' }; + if (this.rules && this.rules.length) { + this.rules = visitor.visitArray(this.rules); } - returner = '' + - '<' + gradientType + 'Gradient id="g" ' + gradientDirectionSvg + '>'; + } + }, { + key: "eval", + value: function _eval(context) { + var selectors; + var selCnt; + var selector; + var i; + var hasVariable; + var hasOnePassingSelector = false; + + if (this.selectors && (selCnt = this.selectors.length)) { + selectors = new Array(selCnt); + defaultFunc$1.error({ + type: 'Syntax', + message: 'it is currently only allowed in parametric mixin guards,' + }); - for (i = 0; i < stops.length; i += 1) { - if (stops[i] instanceof Expression) { - color = stops[i].value[0]; - position = stops[i].value[1]; - } else { - color = stops[i]; - position = undefined; - } + for (i = 0; i < selCnt; i++) { + selector = this.selectors[i].eval(context); - if (!(color instanceof Color) || (!((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension))) { - throwArgumentDescriptor(); + for (var j = 0; j < selector.elements.length; j++) { + if (selector.elements[j].isVariable) { + hasVariable = true; + break; + } } - positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%'; - alpha = color.alpha; - returner += ''; - } - returner += '' + - ''; - returner = encodeURIComponent(returner); + selectors[i] = selector; - returner = 'data:image/svg+xml,' + returner; - return new URL(new Quoted('\'' + returner + '\'', returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); - }); -}; - -},{"../tree/color":55,"../tree/dimension":62,"../tree/expression":64,"../tree/quoted":80,"../tree/url":85,"./function-registry":27}],35:[function(require,module,exports){ -var Keyword = require('../tree/keyword'), - DetachedRuleset = require('../tree/detached-ruleset'), - Dimension = require('../tree/dimension'), - Color = require('../tree/color'), - Quoted = require('../tree/quoted'), - Anonymous = require('../tree/anonymous'), - URL = require('../tree/url'), - Operation = require('../tree/operation'), - functionRegistry = require('./function-registry'); - -var isa = function (n, Type) { - return (n instanceof Type) ? Keyword.True : Keyword.False; - }, - isunit = function (n, unit) { - if (unit === undefined) { - throw { type: 'Argument', message: 'missing the required second argument to isunit.' }; - } - unit = typeof unit.value === 'string' ? unit.value : unit; - if (typeof unit !== 'string') { - throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' }; - } - return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False; - }; + if (selector.evaldCondition) { + hasOnePassingSelector = true; + } + } -functionRegistry.addMultiple({ - isruleset: function (n) { - return isa(n, DetachedRuleset); - }, - iscolor: function (n) { - return isa(n, Color); - }, - isnumber: function (n) { - return isa(n, Dimension); - }, - isstring: function (n) { - return isa(n, Quoted); - }, - iskeyword: function (n) { - return isa(n, Keyword); - }, - isurl: function (n) { - return isa(n, URL); - }, - ispixel: function (n) { - return isunit(n, 'px'); - }, - ispercentage: function (n) { - return isunit(n, '%'); - }, - isem: function (n) { - return isunit(n, 'em'); - }, - isunit: isunit, - unit: function (val, unit) { - if (!(val instanceof Dimension)) { - throw { type: 'Argument', - message: 'the first argument to unit must be a number' + - (val instanceof Operation ? '. Have you forgotten parenthesis?' : '') }; - } - if (unit) { - if (unit instanceof Keyword) { - unit = unit.value; - } else { - unit = unit.toCSS(); + if (hasVariable) { + var toParseSelectors = new Array(selCnt); + + for (i = 0; i < selCnt; i++) { + selector = selectors[i]; + toParseSelectors[i] = selector.toCSS(context); } + + this.parse.parseNode(toParseSelectors.join(','), ["selectors"], selectors[0].getIndex(), selectors[0].fileInfo(), function (err, result) { + if (result) { + selectors = flattenArray(result); + } + }); + } + + defaultFunc$1.reset(); } else { - unit = ''; + hasOnePassingSelector = true; } - return new Dimension(val.value, unit); - }, - 'get-unit': function (n) { - return new Anonymous(n.unit); - } -}); - -},{"../tree/anonymous":50,"../tree/color":55,"../tree/detached-ruleset":61,"../tree/dimension":62,"../tree/keyword":70,"../tree/operation":77,"../tree/quoted":80,"../tree/url":85,"./function-registry":27}],36:[function(require,module,exports){ -var contexts = require('./contexts'), - Parser = require('./parser/parser'), - LessError = require('./less-error'), - utils = require('./utils'), - PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise, - logger = require('./logger'); -module.exports = function(environment) { + var rules = this.rules ? copyArray(this.rules) : null; + var ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo()); + var rule; + var subRule; + ruleset.originalRuleset = this; + ruleset.root = this.root; + ruleset.firstRoot = this.firstRoot; + ruleset.allowImports = this.allowImports; - // FileInfo = { - // 'rewriteUrls' - option - whether to adjust URL's to be relative - // 'filename' - full resolved filename of current file - // 'rootpath' - path to append to normal URLs for this node - // 'currentDirectory' - path to the current file, absolute - // 'rootFilename' - filename of the base file - // 'entryPath' - absolute path to the entry file - // 'reference' - whether the file should not be output and only output parts that are referenced + if (this.debugInfo) { + ruleset.debugInfo = this.debugInfo; + } - var ImportManager = function(less, context, rootFileInfo) { - this.less = less; - this.rootFilename = rootFileInfo.filename; - this.paths = context.paths || []; // Search paths, when importing - this.contents = {}; // map - filename to contents of all the files - this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore - this.mime = context.mime; - this.error = null; - this.context = context; - // Deprecated? Unused outside of here, could be useful. - this.queue = []; // Files which haven't been imported yet - this.files = {}; // Holds the imported parse trees. - }; + if (!hasOnePassingSelector) { + rules.length = 0; + } // inherit a function registry from the frames stack when possible; + // otherwise from the global registry - /** - * Add an import to be imported - * @param path - the raw path - * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension) - * @param currentFileInfo - the current file info (used for instance to work out relative paths) - * @param importOptions - import options - * @param callback - callback for when it is imported - */ - ImportManager.prototype.push = function (path, tryAppendExtension, currentFileInfo, importOptions, callback) { - var importManager = this, - pluginLoader = this.context.pluginManager.Loader; - this.queue.push(path); + ruleset.functionRegistry = function (frames) { + var i = 0; + var n = frames.length; + var found; - var fileParsedFunc = function (e, root, fullPath) { - importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue + for (; i !== n; ++i) { + found = frames[i].functionRegistry; - var importedEqualsRoot = fullPath === importManager.rootFilename; - if (importOptions.optional && e) { - callback(null, {rules:[]}, false, null); - logger.info('The file ' + fullPath + ' was skipped because it was not found and the import was marked optional.'); - } - else { - // Inline imports aren't cached here. - // If we start to cache them, please make sure they won't conflict with non-inline imports of the - // same name as they used to do before this comment and the condition below have been added. - if (!importManager.files[fullPath] && !importOptions.inline) { - importManager.files[fullPath] = { root: root, options: importOptions }; - } - if (e && !importManager.error) { importManager.error = e; } - callback(e, root, importedEqualsRoot, fullPath); + if (found) { + return found; } - }; + } - var newFileInfo = { - rewriteUrls: this.context.rewriteUrls, - entryPath: currentFileInfo.entryPath, - rootpath: currentFileInfo.rootpath, - rootFilename: currentFileInfo.rootFilename - }; + return functionRegistry; + }(context.frames).inherit(); // push the current ruleset to the frames stack - var fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment); - if (!fileManager) { - fileParsedFunc({ message: 'Could not find a file-manager for ' + path }); - return; - } + var ctxFrames = context.frames; + ctxFrames.unshift(ruleset); // currrent selectors - var loadFileCallback = function(loadedFile) { - var plugin, - resolvedFilename = loadedFile.filename, - contents = loadedFile.contents.replace(/^\uFEFF/, ''); + var ctxSelectors = context.selectors; - // Pass on an updated rootpath if path of imported file is relative and file - // is in a (sub|sup) directory - // - // Examples: - // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/', - // then rootpath should become 'less/module/nav/' - // - If path of imported file is '../mixins.less' and rootpath is 'less/', - // then rootpath should become 'less/../' - newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename); - if (newFileInfo.rewriteUrls) { - newFileInfo.rootpath = fileManager.join( - (importManager.context.rootpath || ''), - fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath)); + if (!ctxSelectors) { + context.selectors = ctxSelectors = []; + } - if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) { - newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath); - } - } - newFileInfo.filename = resolvedFilename; + ctxSelectors.unshift(this.selectors); // Evaluate imports - var newEnv = new contexts.Parse(importManager.context); + if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) { + ruleset.evalImports(context); + } // Store the frames around mixin definitions, + // so they can be evaluated like closures when the time comes. - newEnv.processImports = false; - importManager.contents[resolvedFilename] = contents; - if (currentFileInfo.reference || importOptions.reference) { - newFileInfo.reference = true; - } + var rsRules = ruleset.rules; - if (importOptions.isPlugin) { - plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo); - if (plugin instanceof LessError) { - fileParsedFunc(plugin, null, resolvedFilename); - } - else { - fileParsedFunc(null, plugin, resolvedFilename); - } - } else if (importOptions.inline) { - fileParsedFunc(null, contents, resolvedFilename); - } else { + for (i = 0; rule = rsRules[i]; i++) { + if (rule.evalFirst) { + rsRules[i] = rule.eval(context); + } + } - // import (multiple) parse trees apparently get altered and can't be cached. - // TODO: investigate why this is - if (importManager.files[resolvedFilename] - && !importManager.files[resolvedFilename].options.multiple - && !importOptions.multiple) { + var mediaBlockCount = context.mediaBlocks && context.mediaBlocks.length || 0; // Evaluate mixin calls. - fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename); - } - else { - new Parser(newEnv, importManager, newFileInfo).parse(contents, function (e, root) { - fileParsedFunc(e, root, resolvedFilename); - }); - } - } - }; - var promise, context = utils.clone(this.context); + for (i = 0; rule = rsRules[i]; i++) { + if (rule.type === 'MixinCall') { + /* jshint loopfunc:true */ + rules = rule.eval(context).filter(function (r) { + if (r instanceof Declaration && r.variable) { + // do not pollute the scope if the variable is + // already there. consider returning false here + // but we need a way to "return" variable from mixins + return !ruleset.variable(r.name); + } + + return true; + }); + rsRules.splice.apply(rsRules, _toConsumableArray([i, 1].concat(rules))); + i += rules.length - 1; + ruleset.resetCache(); + } else if (rule.type === 'VariableCall') { + /* jshint loopfunc:true */ + rules = rule.eval(context).rules.filter(function (r) { + if (r instanceof Declaration && r.variable) { + // do not pollute the scope at all + return false; + } - if (tryAppendExtension) { - context.ext = importOptions.isPlugin ? '.js' : '.less'; - } + return true; + }); + rsRules.splice.apply(rsRules, _toConsumableArray([i, 1].concat(rules))); + i += rules.length - 1; + ruleset.resetCache(); + } + } // Evaluate everything else - if (importOptions.isPlugin) { - promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager); - } - else { - promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment, - function(err, loadedFile) { - if (err) { - fileParsedFunc(err); - } else { - loadFileCallback(loadedFile); - } - }); - } - if (promise) { - promise.then(loadFileCallback, fileParsedFunc); - } - }; - return ImportManager; -}; + for (i = 0; rule = rsRules[i]; i++) { + if (!rule.evalFirst) { + rsRules[i] = rule = rule.eval ? rule.eval(context) : rule; + } + } // Evaluate everything else -},{"./contexts":13,"./less-error":38,"./logger":39,"./parser/parser":44,"./utils":89,"promise":undefined}],37:[function(require,module,exports){ -module.exports = function(environment, fileManagers) { - var SourceMapOutput, SourceMapBuilder, ParseTree, ImportManager, Environment; - var initial = { - version: [3, 9, 0], - data: require('./data'), - tree: require('./tree'), - Environment: (Environment = require('./environment/environment')), - AbstractFileManager: require('./environment/abstract-file-manager'), - AbstractPluginLoader: require('./environment/abstract-plugin-loader'), - environment: (environment = new Environment(environment, fileManagers)), - visitors: require('./visitors'), - Parser: require('./parser/parser'), - functions: require('./functions')(environment), - contexts: require('./contexts'), - SourceMapOutput: (SourceMapOutput = require('./source-map-output')(environment)), - SourceMapBuilder: (SourceMapBuilder = require('./source-map-builder')(SourceMapOutput, environment)), - ParseTree: (ParseTree = require('./parse-tree')(SourceMapBuilder)), - ImportManager: (ImportManager = require('./import-manager')(environment)), - render: require('./render')(environment, ParseTree, ImportManager), - parse: require('./parse')(environment, ParseTree, ImportManager), - LessError: require('./less-error'), - transformTree: require('./transform-tree'), - utils: require('./utils'), - PluginManager: require('./plugin-manager'), - logger: require('./logger') - }; + for (i = 0; rule = rsRules[i]; i++) { + // for rulesets, check if it is a css guard and can be removed + if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) { + // check if it can be folded in (e.g. & where) + if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) { + rsRules.splice(i--, 1); - // Create a public API + for (var j = 0; subRule = rule.rules[j]; j++) { + if (subRule instanceof Node) { + subRule.copyVisibilityInfo(rule.visibilityInfo()); - var ctor = function(t) { - return function() { - var obj = Object.create(t.prototype); - t.apply(obj, Array.prototype.slice.call(arguments, 0)); - return obj; - }; - }; - var t, api = Object.create(initial); - for (var n in initial.tree) { - /* eslint guard-for-in: 0 */ - t = initial.tree[n]; - if (typeof t === 'function') { - api[n.toLowerCase()] = ctor(t); - } - else { - api[n] = Object.create(null); - for (var o in t) { - /* eslint guard-for-in: 0 */ - api[n][o.toLowerCase()] = ctor(t[o]); + if (!(subRule instanceof Declaration) || !subRule.variable) { + rsRules.splice(++i, 0, subRule); + } + } + } } - } - } + } + } // Pop the stack - return api; -}; - -},{"./contexts":13,"./data":15,"./environment/abstract-file-manager":18,"./environment/abstract-plugin-loader":19,"./environment/environment":20,"./functions":28,"./import-manager":36,"./less-error":38,"./logger":39,"./parse":41,"./parse-tree":40,"./parser/parser":44,"./plugin-manager":45,"./render":46,"./source-map-builder":47,"./source-map-output":48,"./transform-tree":49,"./tree":67,"./utils":89,"./visitors":93}],38:[function(require,module,exports){ -var utils = require('./utils'); -/** - * This is a centralized class of any error that could be thrown internally (mostly by the parser). - * Besides standard .message it keeps some additional data like a path to the file where the error - * occurred along with line and column numbers. - * - * @class - * @extends Error - * @type {module.LessError} - * - * @prop {string} type - * @prop {string} filename - * @prop {number} index - * @prop {number} line - * @prop {number} column - * @prop {number} callLine - * @prop {number} callExtract - * @prop {string[]} extract - * - * @param {Object} e - An error object to wrap around or just a descriptive object - * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager? - * @param {string} [currentFilename] - */ -var LessError = module.exports = function LessError(e, fileContentMap, currentFilename) { - Error.call(this); - var filename = e.filename || currentFilename; + ctxFrames.shift(); + ctxSelectors.shift(); - this.message = e.message; - this.stack = e.stack; + if (context.mediaBlocks) { + for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) { + context.mediaBlocks[i].bubbleSelectors(selectors); + } + } - if (fileContentMap && filename) { - var input = fileContentMap.contents[filename], - loc = utils.getLocation(e.index, input), - line = loc.line, - col = loc.column, - callLine = e.call && utils.getLocation(e.call, input).line, - lines = input ? input.split('\n') : ''; - - this.type = e.type || 'Syntax'; - this.filename = filename; - this.index = e.index; - this.line = typeof line === 'number' ? line + 1 : null; - this.column = col; - - if (!this.line && this.stack) { - var found = this.stack.match(/(|Function):(\d+):(\d+)/); + return ruleset; + } + }, { + key: "evalImports", + value: function evalImports(context) { + var rules = this.rules; + var i; + var importRules; - if (found) { - if (found[2]) { - this.line = parseInt(found[2]) - 2; - } - if (found[3]) { - this.column = parseInt(found[3]); - } - } + if (!rules) { + return; } - this.callLine = callLine + 1; - this.callExtract = lines[callLine]; + for (i = 0; i < rules.length; i++) { + if (rules[i].type === 'Import') { + importRules = rules[i].eval(context); - this.extract = [ - lines[this.line - 2], - lines[this.line - 1], - lines[this.line] - ]; + if (importRules && (importRules.length || importRules.length === 0)) { + rules.splice.apply(rules, _toConsumableArray([i, 1].concat(importRules))); + i += importRules.length - 1; + } else { + rules.splice(i, 1, importRules); + } - } + this.resetCache(); + } + } + } + }, { + key: "makeImportant", + value: function makeImportant() { + var result = new Ruleset(this.selectors, this.rules.map(function (r) { + if (r.makeImportant) { + return r.makeImportant(); + } else { + return r; + } + }), this.strictImports, this.visibilityInfo()); + return result; + } + }, { + key: "matchArgs", + value: function matchArgs(args) { + return !args || args.length === 0; + } // lets you call a css selector with a guard -}; + }, { + key: "matchCondition", + value: function matchCondition(args, context) { + var lastSelector = this.selectors[this.selectors.length - 1]; -if (typeof Object.create === 'undefined') { - var F = function () {}; - F.prototype = Error.prototype; - LessError.prototype = new F(); -} else { - LessError.prototype = Object.create(Error.prototype); -} - -LessError.prototype.constructor = LessError; - -/** - * An overridden version of the default Object.prototype.toString - * which uses additional information to create a helpful message. - * - * @param {Object} options - * @returns {string} - */ -LessError.prototype.toString = function(options) { - options = options || {}; - - var message = ''; - var extract = this.extract || []; - var error = []; - var stylize = function (str) { return str; }; - if (options.stylize) { - var type = typeof options.stylize; - if (type !== 'function') { - throw Error('options.stylize should be a function, got a ' + type + '!'); + if (!lastSelector.evaldCondition) { + return false; } - stylize = options.stylize; - } - if (this.line !== null) { - if (typeof extract[0] === 'string') { - error.push(stylize((this.line - 1) + ' ' + extract[0], 'grey')); + if (lastSelector.condition && !lastSelector.condition.eval(new contexts.Eval(context, context.frames))) { + return false; } - if (typeof extract[1] === 'string') { - var errorTxt = this.line + ' '; - if (extract[1]) { - errorTxt += extract[1].slice(0, this.column) + - stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') + - extract[1].slice(this.column + 1), 'red'), 'inverse'); - } - error.push(errorTxt); - } + return true; + } + }, { + key: "resetCache", + value: function resetCache() { + this._rulesets = null; + this._variables = null; + this._properties = null; + this._lookups = {}; + } + }, { + key: "variables", + value: function variables() { + if (!this._variables) { + this._variables = !this.rules ? {} : this.rules.reduce(function (hash, r) { + if (r instanceof Declaration && r.variable === true) { + hash[r.name] = r; + } // when evaluating variables in an import statement, imports have not been eval'd + // so we need to go inside import statements. + // guard against root being a string (in the case of inlined less) - if (typeof extract[2] === 'string') { - error.push(stylize((this.line + 1) + ' ' + extract[2], 'grey')); - } - error = error.join('\n') + stylize('', 'reset') + '\n'; - } - message += stylize(this.type + 'Error: ' + this.message, 'red'); - if (this.filename) { - message += stylize(' in ', 'red') + this.filename; - } - if (this.line) { - message += stylize(' on line ' + this.line + ', column ' + (this.column + 1) + ':', 'grey'); - } + if (r.type === 'Import' && r.root && r.root.variables) { + var vars = r.root.variables(); - message += '\n' + error; + for (var name in vars) { + if (vars.hasOwnProperty(name)) { + hash[name] = r.root.variable(name); + } + } + } - if (this.callLine) { - message += stylize('from ', 'red') + (this.filename || '') + '/n'; - message += stylize(this.callLine, 'grey') + ' ' + this.callExtract + '/n'; - } + return hash; + }, {}); + } - return message; -}; + return this._variables; + } + }, { + key: "properties", + value: function properties() { + if (!this._properties) { + this._properties = !this.rules ? {} : this.rules.reduce(function (hash, r) { + if (r instanceof Declaration && r.variable !== true) { + var name = r.name.length === 1 && r.name[0] instanceof Keyword ? r.name[0].value : r.name; // Properties don't overwrite as they can merge -},{"./utils":89}],39:[function(require,module,exports){ -module.exports = { - error: function(msg) { - this._fireEvent('error', msg); - }, - warn: function(msg) { - this._fireEvent('warn', msg); - }, - info: function(msg) { - this._fireEvent('info', msg); - }, - debug: function(msg) { - this._fireEvent('debug', msg); - }, - addListener: function(listener) { - this._listeners.push(listener); - }, - removeListener: function(listener) { - for (var i = 0; i < this._listeners.length; i++) { - if (this._listeners[i] === listener) { - this._listeners.splice(i, 1); - return; - } - } - }, - _fireEvent: function(type, msg) { - for (var i = 0; i < this._listeners.length; i++) { - var logFunction = this._listeners[i][type]; - if (logFunction) { - logFunction(msg); + if (!hash["$".concat(name)]) { + hash["$".concat(name)] = [r]; + } else { + hash["$".concat(name)].push(r); + } } + + return hash; + }, {}); } - }, - _listeners: [] -}; -},{}],40:[function(require,module,exports){ -var LessError = require('./less-error'), - transformTree = require('./transform-tree'), - logger = require('./logger'); + return this._properties; + } + }, { + key: "variable", + value: function variable(name) { + var decl = this.variables()[name]; -module.exports = function(SourceMapBuilder) { - var ParseTree = function(root, imports) { - this.root = root; - this.imports = imports; - }; + if (decl) { + return this.parseValue(decl); + } + } + }, { + key: "property", + value: function property(name) { + var decl = this.properties()[name]; - ParseTree.prototype.toCSS = function(options) { - var evaldRoot, result = {}, sourceMapBuilder; - try { - evaldRoot = transformTree(this.root, options); - } catch (e) { - throw new LessError(e, this.imports); + if (decl) { + return this.parseValue(decl); } + } + }, { + key: "lastDeclaration", + value: function lastDeclaration() { + for (var i = this.rules.length; i > 0; i--) { + var decl = this.rules[i - 1]; - try { - var compress = Boolean(options.compress); - if (compress) { - logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); - } + if (decl instanceof Declaration) { + return this.parseValue(decl); + } + } + } + }, { + key: "parseValue", + value: function parseValue(toParse) { + var self = this; - var toCSSOptions = { - compress: compress, - dumpLineNumbers: options.dumpLineNumbers, - strictUnits: Boolean(options.strictUnits), - numPrecision: 8}; + function transformDeclaration(decl) { + if (decl.value instanceof Anonymous && !decl.parsed) { + if (typeof decl.value.value === 'string') { + this.parse.parseNode(decl.value.value, ['value', 'important'], decl.value.getIndex(), decl.fileInfo(), function (err, result) { + if (err) { + decl.parsed = true; + } - if (options.sourceMap) { - sourceMapBuilder = new SourceMapBuilder(options.sourceMap); - result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports); + if (result) { + decl.value = result[0]; + decl.important = result[1] || ''; + decl.parsed = true; + } + }); } else { - result.css = evaldRoot.toCSS(toCSSOptions); + decl.parsed = true; } - } catch (e) { - throw new LessError(e, this.imports); + + return decl; + } else { + return decl; + } } - if (options.pluginManager) { - var postProcessors = options.pluginManager.getPostProcessors(); - for (var i = 0; i < postProcessors.length; i++) { - result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options: options, imports: this.imports }); - } + if (!Array.isArray(toParse)) { + return transformDeclaration.call(self, toParse); + } else { + var nodes = []; + toParse.forEach(function (n) { + nodes.push(transformDeclaration.call(self, n)); + }); + return nodes; } - if (options.sourceMap) { - result.map = sourceMapBuilder.getExternalSourceMap(); + } + }, { + key: "rulesets", + value: function rulesets() { + if (!this.rules) { + return []; } - result.imports = []; - for (var file in this.imports.files) { - if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) { - result.imports.push(file); - } - } - return result; - }; - return ParseTree; -}; + var filtRules = []; + var rules = this.rules; + var i; + var rule; -},{"./less-error":38,"./logger":39,"./transform-tree":49}],41:[function(require,module,exports){ -var PromiseConstructor, - contexts = require('./contexts'), - Parser = require('./parser/parser'), - PluginManager = require('./plugin-manager'), - LessError = require('./less-error'), - utils = require('./utils'); + for (i = 0; rule = rules[i]; i++) { + if (rule.isRuleset) { + filtRules.push(rule); + } + } -module.exports = function(environment, ParseTree, ImportManager) { - var parse = function (input, options, callback) { + return filtRules; + } + }, { + key: "prependRule", + value: function prependRule(rule) { + var rules = this.rules; - if (typeof options === 'function') { - callback = options; - options = utils.copyOptions(this.options, {}); - } - else { - options = utils.copyOptions(this.options, options || {}); + if (rules) { + rules.unshift(rule); + } else { + this.rules = [rule]; } - if (!callback) { - if (!PromiseConstructor) { - PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; - } - var self = this; - return new PromiseConstructor(function (resolve, reject) { - parse.call(self, input, options, function(err, output) { - if (err) { - reject(err); - } else { - resolve(output); - } - }); - }); - } else { - var context, - rootFileInfo, - pluginManager = new PluginManager(this, !options.reUsePluginManager); + this.setParent(rule, this); + } + }, { + key: "find", + value: function find(selector) { + var self = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this; + var filter = arguments.length > 2 ? arguments[2] : undefined; + var rules = []; + var match; + var foundMixins; + var key = selector.toCSS(); + + if (key in this._lookups) { + return this._lookups[key]; + } + + this.rulesets().forEach(function (rule) { + if (rule !== self) { + for (var j = 0; j < rule.selectors.length; j++) { + match = selector.match(rule.selectors[j]); - options.pluginManager = pluginManager; + if (match) { + if (selector.elements.length > match) { + if (!filter || filter(rule)) { + foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter); - context = new contexts.Parse(options); + for (var i = 0; i < foundMixins.length; ++i) { + foundMixins[i].path.push(rule); + } - if (options.rootFileInfo) { - rootFileInfo = options.rootFileInfo; - } else { - var filename = options.filename || 'input'; - var entryPath = filename.replace(/[^\/\\]*$/, ''); - rootFileInfo = { - filename: filename, - rewriteUrls: context.rewriteUrls, - rootpath: context.rootpath || '', - currentDirectory: entryPath, - entryPath: entryPath, - rootFilename: filename - }; - // add in a missing trailing slash - if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') { - rootFileInfo.rootpath += '/'; + Array.prototype.push.apply(rules, foundMixins); + } + } else { + rules.push({ + rule: rule, + path: [] + }); } + + break; + } } + } + }); + this._lookups[key] = rules; + return rules; + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + var i; + var j; + var charsetRuleNodes = []; + var ruleNodes = []; + var // Line number debugging + debugInfo$1; + var rule; + var path; + context.tabLevel = context.tabLevel || 0; - var imports = new ImportManager(this, context, rootFileInfo); - this.importManager = imports; + if (!this.root) { + context.tabLevel++; + } - // TODO: allow the plugins to be just a list of paths or names - // Do an async plugin queue like lessc + var tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' '); + var tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' '); + var sep; + var charsetNodeIndex = 0; + var importNodeIndex = 0; - if (options.plugins) { - options.plugins.forEach(function(plugin) { - var evalResult, contents; - if (plugin.fileContent) { - contents = plugin.fileContent.replace(/^\uFEFF/, ''); - evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename); - if (evalResult instanceof LessError) { - return callback(evalResult); - } - } - else { - pluginManager.addPlugin(plugin); - } - }); + for (i = 0; rule = this.rules[i]; i++) { + if (rule instanceof Comment) { + if (importNodeIndex === i) { + importNodeIndex++; } - new Parser(context, imports, rootFileInfo) - .parse(input, function (e, root) { - if (e) { return callback(e); } - callback(null, root, imports, options); - }, options); + ruleNodes.push(rule); + } else if (rule.isCharset && rule.isCharset()) { + ruleNodes.splice(charsetNodeIndex, 0, rule); + charsetNodeIndex++; + importNodeIndex++; + } else if (rule.type === 'Import') { + ruleNodes.splice(importNodeIndex, 0, rule); + importNodeIndex++; + } else { + ruleNodes.push(rule); + } } - }; - return parse; -}; - -},{"./contexts":13,"./less-error":38,"./parser/parser":44,"./plugin-manager":45,"./utils":89,"promise":undefined}],42:[function(require,module,exports){ -// Split the input into chunks. -module.exports = function (input, fail) { - var len = input.length, level = 0, parenLevel = 0, - lastOpening, lastOpeningParen, lastMultiComment, lastMultiCommentEndBrace, - chunks = [], emitFrom = 0, - chunkerCurrentIndex, currentChunkStartIndex, cc, cc2, matched; - function emitChunk(force) { - var len = chunkerCurrentIndex - emitFrom; - if (((len < 512) && !force) || !len) { - return; - } - chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1)); - emitFrom = chunkerCurrentIndex + 1; - } + ruleNodes = charsetRuleNodes.concat(ruleNodes); // If this is the root node, we don't render + // a selector, or {}. - for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) { - cc = input.charCodeAt(chunkerCurrentIndex); - if (((cc >= 97) && (cc <= 122)) || (cc < 34)) { - // a-z or whitespace - continue; - } + if (!this.root) { + debugInfo$1 = debugInfo(context, this, tabSetStr); - switch (cc) { - case 40: // ( - parenLevel++; - lastOpeningParen = chunkerCurrentIndex; - continue; - case 41: // ) - if (--parenLevel < 0) { - return fail('missing opening `(`', chunkerCurrentIndex); - } - continue; - case 59: // ; - if (!parenLevel) { emitChunk(); } - continue; - case 123: // { - level++; - lastOpening = chunkerCurrentIndex; - continue; - case 125: // } - if (--level < 0) { - return fail('missing opening `{`', chunkerCurrentIndex); - } - if (!level && !parenLevel) { emitChunk(); } - continue; - case 92: // \ - if (chunkerCurrentIndex < len - 1) { chunkerCurrentIndex++; continue; } - return fail('unescaped `\\`', chunkerCurrentIndex); - case 34: - case 39: - case 96: // ", ' and ` - matched = 0; - currentChunkStartIndex = chunkerCurrentIndex; - for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) { - cc2 = input.charCodeAt(chunkerCurrentIndex); - if (cc2 > 96) { continue; } - if (cc2 == cc) { matched = 1; break; } - if (cc2 == 92) { // \ - if (chunkerCurrentIndex == len - 1) { - return fail('unescaped `\\`', chunkerCurrentIndex); - } - chunkerCurrentIndex++; - } - } - if (matched) { continue; } - return fail('unmatched `' + String.fromCharCode(cc) + '`', currentChunkStartIndex); - case 47: // /, check for comment - if (parenLevel || (chunkerCurrentIndex == len - 1)) { continue; } - cc2 = input.charCodeAt(chunkerCurrentIndex + 1); - if (cc2 == 47) { - // //, find lnfeed - for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) { - cc2 = input.charCodeAt(chunkerCurrentIndex); - if ((cc2 <= 13) && ((cc2 == 10) || (cc2 == 13))) { break; } - } - } else if (cc2 == 42) { - // /*, find */ - lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex; - for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) { - cc2 = input.charCodeAt(chunkerCurrentIndex); - if (cc2 == 125) { lastMultiCommentEndBrace = chunkerCurrentIndex; } - if (cc2 != 42) { continue; } - if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { break; } - } - if (chunkerCurrentIndex == len - 1) { - return fail('missing closing `*/`', currentChunkStartIndex); - } - chunkerCurrentIndex++; - } - continue; - case 42: // *, check for unmatched */ - if ((chunkerCurrentIndex < len - 1) && (input.charCodeAt(chunkerCurrentIndex + 1) == 47)) { - return fail('unmatched `/*`', chunkerCurrentIndex); - } - continue; - } - } + if (debugInfo$1) { + output.add(debugInfo$1); + output.add(tabSetStr); + } - if (level !== 0) { - if ((lastMultiComment > lastOpening) && (lastMultiCommentEndBrace > lastMultiComment)) { - return fail('missing closing `}` or `*/`', lastOpening); - } else { - return fail('missing closing `}`', lastOpening); - } - } else if (parenLevel !== 0) { - return fail('missing closing `)`', lastOpeningParen); - } + var paths = this.paths; + var pathCnt = paths.length; + var pathSubCnt; + sep = context.compress ? ',' : ",\n".concat(tabSetStr); - emitChunk(true); - return chunks; -}; - -},{}],43:[function(require,module,exports){ -var chunker = require('./chunker'); - -module.exports = function() { - var input, // Less input string - j, // current chunk - saveStack = [], // holds state for backtracking - furthest, // furthest index the parser has gone to - furthestPossibleErrorMessage, // if this is furthest we got to, this is the probably cause - chunks, // chunkified input - current, // current chunk - currentPos, // index of current chunk, in `input` - parserInput = {}; - - var CHARCODE_SPACE = 32, - CHARCODE_TAB = 9, - CHARCODE_LF = 10, - CHARCODE_CR = 13, - CHARCODE_PLUS = 43, - CHARCODE_COMMA = 44, - CHARCODE_FORWARD_SLASH = 47, - CHARCODE_9 = 57; + for (i = 0; i < pathCnt; i++) { + path = paths[i]; - function skipWhitespace(length) { - var oldi = parserInput.i, oldj = j, - curr = parserInput.i - currentPos, - endIndex = parserInput.i + current.length - curr, - mem = (parserInput.i += length), - inp = input, - c, nextChar, comment; - - for (; parserInput.i < endIndex; parserInput.i++) { - c = inp.charCodeAt(parserInput.i); - - if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) { - nextChar = inp.charAt(parserInput.i + 1); - if (nextChar === '/') { - comment = {index: parserInput.i, isLineComment: true}; - var nextNewLine = inp.indexOf('\n', parserInput.i + 2); - if (nextNewLine < 0) { - nextNewLine = endIndex; - } - parserInput.i = nextNewLine; - comment.text = inp.substr(comment.index, parserInput.i - comment.index); - parserInput.commentStore.push(comment); - continue; - } else if (nextChar === '*') { - var nextStarSlash = inp.indexOf('*/', parserInput.i + 2); - if (nextStarSlash >= 0) { - comment = { - index: parserInput.i, - text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i), - isLineComment: false - }; - parserInput.i += comment.text.length - 1; - parserInput.commentStore.push(comment); - continue; - } - } - break; + if (!(pathSubCnt = path.length)) { + continue; } - if ((c !== CHARCODE_SPACE) && (c !== CHARCODE_LF) && (c !== CHARCODE_TAB) && (c !== CHARCODE_CR)) { - break; + if (i > 0) { + output.add(sep); } - } - current = current.slice(length + parserInput.i - mem + curr); - currentPos = parserInput.i; + context.firstSelector = true; + path[0].genCSS(context, output); + context.firstSelector = false; - if (!current.length) { - if (j < chunks.length - 1) { - current = chunks[++j]; - skipWhitespace(0); // skip space at the beginning of a chunk - return true; // things changed + for (j = 1; j < pathSubCnt; j++) { + path[j].genCSS(context, output); } - parserInput.finished = true; - } + } - return oldi !== parserInput.i || oldj !== j; - } + output.add((context.compress ? '{' : ' {\n') + tabRuleStr); + } // Compile rules and rulesets - parserInput.save = function() { - currentPos = parserInput.i; - saveStack.push( { current: current, i: parserInput.i, j: j }); - }; - parserInput.restore = function(possibleErrorMessage) { - if (parserInput.i > furthest || (parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage)) { - furthest = parserInput.i; - furthestPossibleErrorMessage = possibleErrorMessage; - } - var state = saveStack.pop(); - current = state.current; - currentPos = parserInput.i = state.i; - j = state.j; - }; - parserInput.forget = function() { - saveStack.pop(); - }; - parserInput.isWhitespace = function (offset) { - var pos = parserInput.i + (offset || 0), - code = input.charCodeAt(pos); - return (code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF); - }; + for (i = 0; rule = ruleNodes[i]; i++) { + if (i + 1 === ruleNodes.length) { + context.lastRule = true; + } - // Specialization of $(tok) - parserInput.$re = function(tok) { - if (parserInput.i > currentPos) { - current = current.slice(parserInput.i - currentPos); - currentPos = parserInput.i; - } + var currentLastRule = context.lastRule; - var m = tok.exec(current); - if (!m) { - return null; - } + if (rule.isRulesetLike(rule)) { + context.lastRule = false; + } - skipWhitespace(m[0].length); - if (typeof m === 'string') { - return m; - } + if (rule.genCSS) { + rule.genCSS(context, output); + } else if (rule.value) { + output.add(rule.value.toString()); + } - return m.length === 1 ? m[0] : m; - }; + context.lastRule = currentLastRule; - parserInput.$char = function(tok) { - if (input.charAt(parserInput.i) !== tok) { - return null; + if (!context.lastRule && rule.isVisible()) { + output.add(context.compress ? '' : "\n".concat(tabRuleStr)); + } else { + context.lastRule = false; + } } - skipWhitespace(1); - return tok; - }; - parserInput.$str = function(tok) { - var tokLength = tok.length; - - // https://jsperf.com/string-startswith/21 - for (var i = 0; i < tokLength; i++) { - if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { - return null; - } + if (!this.root) { + output.add(context.compress ? '}' : "\n".concat(tabSetStr, "}")); + context.tabLevel--; } - skipWhitespace(tokLength); - return tok; - }; - - parserInput.$quoted = function(loc) { - var pos = loc || parserInput.i, - startChar = input.charAt(pos); - - if (startChar !== '\'' && startChar !== '"') { - return; + if (!output.isEmpty() && !context.compress && this.firstRoot) { + output.add('\n'); } - var length = input.length, - currentPosition = pos; - - for (var i = 1; i + currentPosition < length; i++) { - var nextChar = input.charAt(i + currentPosition); - switch (nextChar) { - case '\\': - i++; - continue; - case '\r': - case '\n': - break; - case startChar: - var str = input.substr(currentPosition, i + 1); - if (!loc && loc !== 0) { - skipWhitespace(i + 1); - return str - } - return [startChar, str]; - default: - } + } + }, { + key: "joinSelectors", + value: function joinSelectors(paths, context, selectors) { + for (var s = 0; s < selectors.length; s++) { + this.joinSelector(paths, context, selectors[s]); } - return null; - }; + } + }, { + key: "joinSelector", + value: function joinSelector(paths, context, selector) { + function createParenthesis(elementsToPak, originalElement) { + var replacementParen; + var j; + + if (elementsToPak.length === 0) { + replacementParen = new Paren(elementsToPak[0]); + } else { + var insideParent = new Array(elementsToPak.length); - /** - * Permissive parsing. Ignores everything except matching {} [] () and quotes - * until matching token (outside of blocks) - */ - parserInput.$parseUntil = function(tok) { - var quote = '', - returnVal = null, - inComment = false, - blockDepth = 0, - blockStack = [], - parseGroups = [], - length = input.length, - startPos = parserInput.i, - lastPos = parserInput.i, - i = parserInput.i, - loop = true, - testChar; - - if (typeof tok === 'string') { - testChar = function(char) { - return char === tok; - } - } else { - testChar = function(char) { - return tok.test(char); + for (j = 0; j < elementsToPak.length; j++) { + insideParent[j] = new Element(null, elementsToPak[j], originalElement.isVariable, originalElement._index, originalElement._fileInfo); } + + replacementParen = new Paren(new Selector(insideParent)); + } + + return replacementParen; } - do { - var prevChar, nextChar = input.charAt(i); - if (blockDepth === 0 && testChar(nextChar)) { - returnVal = input.substr(lastPos, i - lastPos); - if (returnVal) { - parseGroups.push(returnVal); - } - else { - parseGroups.push(' '); - } - returnVal = parseGroups; - skipWhitespace(i - startPos); - loop = false - } else { - if (inComment) { - if (nextChar === '*' && - input.charAt(i + 1) === '/') { - i++; - blockDepth--; - inComment = false; - } - i++; - continue; - } - switch (nextChar) { - case '\\': - i++; - nextChar = input.charAt(i); - parseGroups.push(input.substr(lastPos, i - lastPos + 1)); - lastPos = i + 1; - break; - case '/': - if (input.charAt(i + 1) === '*') { - i++; - inComment = true; - blockDepth++; - } - break; - case '\'': - case '"': - quote = parserInput.$quoted(i); - if (quote) { - parseGroups.push(input.substr(lastPos, i - lastPos), quote); - i += quote[1].length - 1; - lastPos = i + 1; - } - else { - skipWhitespace(i - startPos); - returnVal = nextChar; - loop = false; - } - break; - case '{': - blockStack.push('}'); - blockDepth++; - break; - case '(': - blockStack.push(')'); - blockDepth++; - break; - case '[': - blockStack.push(']'); - blockDepth++; - break; - case '}': - case ')': - case ']': - var expected = blockStack.pop(); - if (nextChar === expected) { - blockDepth--; - } else { - // move the parser to the error and return expected - skipWhitespace(i - startPos); - returnVal = expected; - loop = false; - } - } - i++; - if (i > length) { - loop = false; - } - } - prevChar = nextChar; - } while (loop); + function createSelector(containedElement, originalElement) { + var element; + var selector; + element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo); + selector = new Selector([element]); + return selector; + } // joins selector path from `beginningPath` with selector path in `addPath` + // `replacedElement` contains element that is being replaced by `addPath` + // returns concatenated path - return returnVal ? returnVal : null; - } - parserInput.autoCommentAbsorb = true; - parserInput.commentStore = []; - parserInput.finished = false; + function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) { + var newSelectorPath; + var lastSelector; + var newJoinedSelector; // our new selector path - // Same as $(), but don't change the state of the parser, - // just return the match. - parserInput.peek = function(tok) { - if (typeof tok === 'string') { - // https://jsperf.com/string-startswith/21 - for (var i = 0; i < tok.length; i++) { - if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { - return false; - } - } - return true; - } else { - return tok.test(current); - } - }; + newSelectorPath = []; // construct the joined selector - if & is the first thing this will be empty, + // if not newJoinedSelector will be the last set of elements in the selector - // Specialization of peek() - // TODO remove or change some currentChar calls to peekChar - parserInput.peekChar = function(tok) { - return input.charAt(parserInput.i) === tok; - }; + if (beginningPath.length > 0) { + newSelectorPath = copyArray(beginningPath); + lastSelector = newSelectorPath.pop(); + newJoinedSelector = originalSelector.createDerived(copyArray(lastSelector.elements)); + } else { + newJoinedSelector = originalSelector.createDerived([]); + } - parserInput.currentChar = function() { - return input.charAt(parserInput.i); - }; + if (addPath.length > 0) { + // /deep/ is a CSS4 selector - (removed, so should deprecate) + // that is valid without anything in front of it + // so if the & does not have a combinator that is "" or " " then + // and there is a combinator on the parent, then grab that. + // this also allows + a { & .b { .a & { ... though not sure why you would want to do that + var combinator = replacedElement.combinator; + var parentEl = addPath[0].elements[0]; - parserInput.prevChar = function() { - return input.charAt(parserInput.i - 1); - }; + if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) { + combinator = parentEl.combinator; + } // join the elements so far with the first part of the parent - parserInput.getInput = function() { - return input; - }; - parserInput.peekNotNumeric = function() { - var c = input.charCodeAt(parserInput.i); - // Is the first char of the dimension 0-9, '.', '+' or '-' - return (c > CHARCODE_9 || c < CHARCODE_PLUS) || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA; - }; + newJoinedSelector.elements.push(new Element(combinator, parentEl.value, replacedElement.isVariable, replacedElement._index, replacedElement._fileInfo)); + newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1)); + } // now add the joined selector - but only if it is not empty - parserInput.start = function(str, chunkInput, failFunction) { - input = str; - parserInput.i = j = currentPos = furthest = 0; - - // chunking apparently makes things quicker (but my tests indicate - // it might actually make things slower in node at least) - // and it is a non-perfect parse - it can't recognise - // unquoted urls, meaning it can't distinguish comments - // meaning comments with quotes or {}() in them get 'counted' - // and then lead to parse errors. - // In addition if the chunking chunks in the wrong place we might - // not be able to parse a parser statement in one go - // this is officially deprecated but can be switched on via an option - // in the case it causes too much performance issues. - if (chunkInput) { - chunks = chunker(str, failFunction); - } else { - chunks = [str]; - } - current = chunks[0]; + if (newJoinedSelector.elements.length !== 0) { + newSelectorPath.push(newJoinedSelector); + } // put together the parent selectors after the join (e.g. the rest of the parent) - skipWhitespace(0); - }; - parserInput.end = function() { - var message, - isFinished = parserInput.i >= input.length; + if (addPath.length > 1) { + var restOfPath = addPath.slice(1); + restOfPath = restOfPath.map(function (selector) { + return selector.createDerived(selector.elements, []); + }); + newSelectorPath = newSelectorPath.concat(restOfPath); + } - if (parserInput.i < furthest) { - message = furthestPossibleErrorMessage; - parserInput.i = furthest; - } - return { - isFinished: isFinished, - furthest: parserInput.i, - furthestPossibleErrorMessage: message, - furthestReachedEnd: parserInput.i >= input.length - 1, - furthestChar: input[parserInput.i] - }; - }; + return newSelectorPath; + } // joins selector path from `beginningPath` with every selector path in `addPaths` array + // `replacedElement` contains element that is being replaced by `addPath` + // returns array with all concatenated paths - return parserInput; -}; - -},{"./chunker":42}],44:[function(require,module,exports){ -var LessError = require('../less-error'), - tree = require('../tree'), - visitors = require('../visitors'), - getParserInput = require('./parser-input'), - utils = require('../utils'), - functionRegistry = require('../functions/function-registry'); - -// -// less.js - parser -// -// A relatively straight-forward predictive parser. -// There is no tokenization/lexing stage, the input is parsed -// in one sweep. -// -// To make the parser fast enough to run in the browser, several -// optimization had to be made: -// -// - Matching and slicing on a huge input is often cause of slowdowns. -// The solution is to chunkify the input into smaller strings. -// The chunks are stored in the `chunks` var, -// `j` holds the current chunk index, and `currentPos` holds -// the index of the current chunk in relation to `input`. -// This gives us an almost 4x speed-up. -// -// - In many cases, we don't need to match individual tokens; -// for example, if a value doesn't hold any variables, operations -// or dynamic references, the parser can effectively 'skip' it, -// treating it as a literal. -// An example would be '1px solid #000' - which evaluates to itself, -// we don't need to know what the individual components are. -// The drawback, of course is that you don't get the benefits of -// syntax-checking on the CSS. This gives us a 50% speed-up in the parser, -// and a smaller speed-up in the code-gen. -// -// -// Token matching is done with the `$` function, which either takes -// a terminal string or regexp, or a non-terminal function to call. -// It also takes care of moving all the indices forwards. -// - -var Parser = function Parser(context, imports, fileInfo) { - var parsers, - parserInput = getParserInput(); - function error(msg, type) { - throw new LessError( - { - index: parserInput.i, - filename: fileInfo.filename, - type: type || 'Syntax', - message: msg - }, - imports - ); - } + function addAllReplacementsIntoPath(beginningPath, addPaths, replacedElement, originalSelector, result) { + var j; - function expect(arg, msg) { - // some older browsers return typeof 'function' for RegExp - var result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg); - if (result) { - return result; - } - - error(msg || (typeof arg === 'string' - ? 'expected \'' + arg + '\' got \'' + parserInput.currentChar() + '\'' - : 'unexpected token')); - } + for (j = 0; j < beginningPath.length; j++) { + var newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector); + result.push(newSelectorPath); + } - // Specialization of expect() - function expectChar(arg, msg) { - if (parserInput.$char(arg)) { - return arg; + return result; } - error(msg || 'expected \'' + arg + '\' got \'' + parserInput.currentChar() + '\''); - } - function getDebugInfo(index) { - var filename = fileInfo.filename; + function mergeElementsOnToSelectors(elements, selectors) { + var i; + var sel; - return { - lineNumber: utils.getLocation(index, parserInput.getInput()).line + 1, - fileName: filename - }; - } + if (elements.length === 0) { + return; + } - /** - * Used after initial parsing to create nodes on the fly - * - * @param {String} str - string to parse - * @param {Array} parseList - array of parsers to run input through e.g. ["value", "important"] - * @param {Number} currentIndex - start number to begin indexing - * @param {Object} fileInfo - fileInfo to attach to created nodes - */ - function parseNode(str, parseList, currentIndex, fileInfo, callback) { - var result, returnNodes = []; - var parser = parserInput; + if (selectors.length === 0) { + selectors.push([new Selector(elements)]); + return; + } - try { - parser.start(str, false, function fail(msg, index) { - callback({ - message: msg, - index: index + currentIndex - }); - }); - for (var x = 0, p, i; (p = parseList[x]); x++) { - i = parser.i; - result = parsers[p](); - if (result) { - result._index = i + currentIndex; - result._fileInfo = fileInfo; - returnNodes.push(result); - } - else { - returnNodes.push(null); - } + for (i = 0; sel = selectors[i]; i++) { + // if the previous thing in sel is a parent this needs to join on to it + if (sel.length > 0) { + sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements)); + } else { + sel.push(new Selector(elements)); } + } + } // replace all parent selectors inside `inSelector` by content of `context` array + // resulting selectors are returned inside `paths` array + // returns true if `inSelector` contained at least one parent selector + + + function replaceParentSelector(paths, context, inSelector) { + // The paths are [[Selector]] + // The first list is a list of comma separated selectors + // The inner list is a list of inheritance separated selectors + // e.g. + // .a, .b { + // .c { + // } + // } + // == [[.a] [.c]] [[.b] [.c]] + // + var i; + var j; + var k; + var currentElements; + var newSelectors; + var selectorsMultiplied; + var sel; + var el; + var hadParentSelector = false; + var length; + var lastSelector; + + function findNestedSelector(element) { + var maybeSelector; - var endInfo = parser.end(); - if (endInfo.isFinished) { - callback(null, returnNodes); - } - else { - callback(true, null); + if (!(element.value instanceof Paren)) { + return null; } - } catch (e) { - throw new LessError({ - index: e.index + currentIndex, - message: e.message - }, imports, fileInfo.filename); - } - } - - // - // The Parser - // - return { - parserInput: parserInput, - imports: imports, - fileInfo: fileInfo, - parseNode: parseNode, - // - // Parse an input string into an abstract syntax tree, - // @param str A string containing 'less' markup - // @param callback call `callback` when done. - // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply - // - parse: function (str, callback, additionalData) { - var root, error = null, globalVars, modifyVars, ignored, preText = ''; - globalVars = (additionalData && additionalData.globalVars) ? Parser.serializeVars(additionalData.globalVars) + '\n' : ''; - modifyVars = (additionalData && additionalData.modifyVars) ? '\n' + Parser.serializeVars(additionalData.modifyVars) : ''; - - if (context.pluginManager) { - var preProcessors = context.pluginManager.getPreProcessors(); - for (var i = 0; i < preProcessors.length; i++) { - str = preProcessors[i].process(str, { context: context, imports: imports, fileInfo: fileInfo }); - } - } + maybeSelector = element.value.value; - if (globalVars || (additionalData && additionalData.banner)) { - preText = ((additionalData && additionalData.banner) ? additionalData.banner : '') + globalVars; - ignored = imports.contentsIgnoredChars; - ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0; - ignored[fileInfo.filename] += preText.length; + if (!(maybeSelector instanceof Selector)) { + return null; } - str = str.replace(/\r\n?/g, '\n'); - // Remove potential UTF Byte Order Mark - str = preText + str.replace(/^\uFEFF/, '') + modifyVars; - imports.contents[fileInfo.filename] = str; - - // Start with the primary rule. - // The whole syntax tree is held under a Ruleset node, - // with the `root` property set to true, so no `{}` are - // output. The callback is called when the input is parsed. - try { - parserInput.start(str, context.chunkInput, function fail(msg, index) { - throw new LessError({ - index: index, - type: 'Parse', - message: msg, - filename: fileInfo.filename - }, imports); - }); + return maybeSelector; + } // the elements from the current selector so far - tree.Node.prototype.parse = this; - root = new tree.Ruleset(null, this.parsers.primary()); - tree.Node.prototype.rootNode = root; - root.root = true; - root.firstRoot = true; - root.functionRegistry = functionRegistry.inherit(); - - } catch (e) { - return callback(new LessError(e, imports, fileInfo.filename)); - } - // If `i` is smaller than the `input.length - 1`, - // it means the parser wasn't able to parse the whole - // string, so we've got a parsing error. - // - // We try to extract a \n delimited string, - // showing the line where the parse error occurred. - // We split it up into two parts (the part which parsed, - // and the part which didn't), so we can color them differently. - var endInfo = parserInput.end(); - if (!endInfo.isFinished) { - - var message = endInfo.furthestPossibleErrorMessage; - - if (!message) { - message = 'Unrecognised input'; - if (endInfo.furthestChar === '}') { - message += '. Possibly missing opening \'{\''; - } else if (endInfo.furthestChar === ')') { - message += '. Possibly missing opening \'(\''; - } else if (endInfo.furthestReachedEnd) { - message += '. Possibly missing something'; - } - } + currentElements = []; // the current list of new selectors to add to the path. + // We will build it up. We initiate it with one empty selector as we "multiply" the new selectors + // by the parents - error = new LessError({ - type: 'Parse', - message: message, - index: endInfo.furthest, - filename: fileInfo.filename - }, imports); - } + newSelectors = [[]]; - var finish = function (e) { - e = error || e || imports.error; + for (i = 0; el = inSelector.elements[i]; i++) { + // non parent reference elements just get added + if (el.value !== '&') { + var nestedSelector = findNestedSelector(el); - if (e) { - if (!(e instanceof LessError)) { - e = new LessError(e, imports, fileInfo.filename); - } + if (nestedSelector != null) { + // merge the current list of non parent selector elements + // on to the current list of selectors to add + mergeElementsOnToSelectors(currentElements, newSelectors); + var nestedPaths = []; + var replaced = void 0; + var replacedNewSelectors = []; + replaced = replaceParentSelector(nestedPaths, context, nestedSelector); + hadParentSelector = hadParentSelector || replaced; // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors - return callback(e); - } - else { - return callback(null, root); + for (k = 0; k < nestedPaths.length; k++) { + var replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el); + addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors); } - }; - if (context.processImports !== false) { - new visitors.ImportVisitor(imports, finish) - .run(root); + newSelectors = replacedNewSelectors; + currentElements = []; + } else { + currentElements.push(el); + } } else { - return finish(); - } - }, + hadParentSelector = true; // the new list of selectors to add - // - // Here in, the parsing rules/functions - // - // The basic structure of the syntax tree generated is as follows: - // - // Ruleset -> Declaration -> Value -> Expression -> Entity - // - // Here's some Less code: - // - // .class { - // color: #fff; - // border: 1px solid #000; - // width: @w + 4px; - // > .child {...} - // } - // - // And here's what the parse tree might look like: - // - // Ruleset (Selector '.class', [ - // Declaration ("color", Value ([Expression [Color #fff]])) - // Declaration ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]])) - // Declaration ("width", Value ([Expression [Operation " + " [Variable "@w"][Dimension 4px]]])) - // Ruleset (Selector [Element '>', '.child'], [...]) - // ]) - // - // In general, most rules will try to parse a token with the `$re()` function, and if the return - // value is truly, will return a new node, of the relevant type. Sometimes, we need to check - // first, before parsing, that's when we use `peek()`. - // - parsers: parsers = { - // - // The `primary` rule is the *entry* and *exit* point of the parser. - // The rules here can appear at any level of the parse tree. - // - // The recursive nature of the grammar is an interplay between the `block` - // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule, - // as represented by this simplified grammar: - // - // primary → (ruleset | declaration)+ - // ruleset → selector+ block - // block → '{' primary '}' - // - // Only at one point is the primary rule not called from the - // block rule: at the root level. - // - primary: function () { - var mixin = this.mixin, root = [], node; - - while (true) { - while (true) { - node = this.comment(); - if (!node) { break; } - root.push(node); - } - // always process comments before deciding if finished - if (parserInput.finished) { - break; - } - if (parserInput.peek('}')) { - break; - } + selectorsMultiplied = []; // merge the current list of non parent selector elements + // on to the current list of selectors to add - node = this.extendRule(); - if (node) { - root = root.concat(node); - continue; - } + mergeElementsOnToSelectors(currentElements, newSelectors); // loop through our current selectors - node = mixin.definition() || this.declaration() || this.ruleset() || - mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule(); - if (node) { - root.push(node); - } else { - var foundSemiColon = false; - while (parserInput.$char(';')) { - foundSemiColon = true; - } - if (!foundSemiColon) { - break; - } - } - } + for (j = 0; j < newSelectors.length; j++) { + sel = newSelectors[j]; // if we don't have any parent paths, the & might be in a mixin so that it can be used + // whether there are parents or not + + if (context.length === 0) { + // the combinator used on el should now be applied to the next element instead so that + // it is not lost + if (sel.length > 0) { + sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo)); + } - return root; - }, + selectorsMultiplied.push(sel); + } else { + // and the parent selectors + for (k = 0; k < context.length; k++) { + // We need to put the current selectors + // then join the last selector's elements on to the parents selectors + var newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector); // add that to our new set of selectors - // comments are collected by the main parsing mechanism and then assigned to nodes - // where the current structure allows it - comment: function () { - if (parserInput.commentStore.length) { - var comment = parserInput.commentStore.shift(); - return new(tree.Comment)(comment.text, comment.isLineComment, comment.index, fileInfo); + selectorsMultiplied.push(newSelectorPath); + } } - }, + } // our new selectors has been multiplied, so reset the state - // - // Entities are tokens which can be found inside an Expression - // - entities: { - mixinLookup: function() { - return parsers.mixin.call(true, true); - }, - // - // A string, which supports escaping " and ' - // - // "milky way" 'he\'s the one!' - // - quoted: function (forceEscaped) { - var str, index = parserInput.i, isEscaped = false; - - parserInput.save(); - if (parserInput.$char('~')) { - isEscaped = true; - } else if (forceEscaped) { - parserInput.restore(); - return; - } - str = parserInput.$quoted(); - if (!str) { - parserInput.restore(); - return; - } - parserInput.forget(); + newSelectors = selectorsMultiplied; + currentElements = []; + } + } // if we have any elements left over (e.g. .a& .b == .b) + // add them on to all the current selectors - return new(tree.Quoted)(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo); - }, - // - // A catch-all word, such as: - // - // black border-collapse - // - keyword: function () { - var k = parserInput.$char('%') || parserInput.$re(/^\[?(?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\]?/); - if (k) { - return tree.Color.fromKeyword(k) || new(tree.Keyword)(k); - } - }, + mergeElementsOnToSelectors(currentElements, newSelectors); - // - // A function call - // - // rgb(255, 0, 255) - // - // The arguments are parsed with the `entities.arguments` parser. - // - call: function () { - var name, args, func, index = parserInput.i; - - // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 - if (parserInput.peek(/^url\(/i)) { - return; - } + for (i = 0; i < newSelectors.length; i++) { + length = newSelectors[i].length; - parserInput.save(); + if (length > 0) { + paths.push(newSelectors[i]); + lastSelector = newSelectors[i][length - 1]; + newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList); + } + } - name = parserInput.$re(/^([\w-]+|%|progid:[\w\.]+)\(/); - if (!name) { - parserInput.forget(); - return; - } + return hadParentSelector; + } - name = name[1]; - func = this.customFuncCall(name); - if (func) { - args = func.parse(); - if (args && func.stop) { - parserInput.forget(); - return args; - } - } + function deriveSelector(visibilityInfo, deriveFrom) { + var newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition); + newSelector.copyVisibilityInfo(visibilityInfo); + return newSelector; + } // joinSelector code follows - args = this.arguments(args); - if (!parserInput.$char(')')) { - parserInput.restore('Could not parse call arguments or missing \')\''); - return; - } + var i; + var newPaths; + var hadParentSelector; + newPaths = []; + hadParentSelector = replaceParentSelector(newPaths, context, selector); - parserInput.forget(); - - return new(tree.Call)(name, args, index, fileInfo); - }, - - // - // Parsing rules for functions with non-standard args, e.g.: - // - // boolean(not(2 > 1)) - // - // This is a quick prototype, to be modified/improved when - // more custom-parsed funcs come (e.g. `selector(...)`) - // - - customFuncCall: function (name) { - /* Ideally the table is to be moved out of here for faster perf., - but it's quite tricky since it relies on all these `parsers` - and `expect` available only here */ - return { - alpha: f(parsers.ieAlpha, true), - boolean: f(condition), - 'if': f(condition) - }[name.toLowerCase()]; - - function f(parse, stop) { - return { - parse: parse, // parsing function - stop: stop // when true - stop after parse() and return its result, - // otherwise continue for plain args - }; - } - - function condition() { - return [expect(parsers.condition, 'expected condition')]; - } - }, + if (!hadParentSelector) { + if (context.length > 0) { + newPaths = []; - arguments: function (prevArgs) { - var argsComma = prevArgs || [], - argsSemiColon = [], - isSemiColonSeparated, value; - - parserInput.save(); - - while (true) { - if (prevArgs) { - prevArgs = false; - } else { - value = parsers.detachedRuleset() || this.assignment() || parsers.expression(); - if (!value) { - break; - } - - if (value.value && value.value.length == 1) { - value = value.value[0]; - } - - argsComma.push(value); - } - - if (parserInput.$char(',')) { - continue; - } - - if (parserInput.$char(';') || isSemiColonSeparated) { - isSemiColonSeparated = true; - value = (argsComma.length < 1) ? argsComma[0] - : new tree.Value(argsComma); - argsSemiColon.push(value); - argsComma = []; - } - } + for (i = 0; i < context.length; i++) { + var concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo())); + concatenated.push(selector); + newPaths.push(concatenated); + } + } else { + newPaths = [[selector]]; + } + } - parserInput.forget(); - return isSemiColonSeparated ? argsSemiColon : argsComma; - }, - literal: function () { - return this.dimension() || - this.color() || - this.quoted() || - this.unicodeDescriptor(); - }, + for (i = 0; i < newPaths.length; i++) { + paths.push(newPaths[i]); + } + } + }]); - // Assignments are argument entities for calls. - // They are present in ie filter properties as shown below. - // - // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* ) - // - - assignment: function () { - var key, value; - parserInput.save(); - key = parserInput.$re(/^\w+(?=\s?=)/i); - if (!key) { - parserInput.restore(); - return; - } - if (!parserInput.$char('=')) { - parserInput.restore(); - return; - } - value = parsers.entity(); - if (value) { - parserInput.forget(); - return new(tree.Assignment)(key, value); - } else { - parserInput.restore(); - } - }, + return Ruleset; + }(Node); - // - // Parse url() tokens - // - // We use a specific rule for urls, because they don't really behave like - // standard function calls. The difference is that the argument doesn't have - // to be enclosed within a string, so it can't be parsed as an Expression. - // - url: function () { - var value, index = parserInput.i; - - parserInput.autoCommentAbsorb = false; - - if (!parserInput.$str('url(')) { - parserInput.autoCommentAbsorb = true; - return; - } + Ruleset.prototype.type = 'Ruleset'; + Ruleset.prototype.isRuleset = true; - value = this.quoted() || this.variable() || this.property() || - parserInput.$re(/^(?:(?:\\[\(\)'"])|[^\(\)'"])+/) || ''; + var AtRule = + /*#__PURE__*/ + function (_Node) { + _inherits(AtRule, _Node); - parserInput.autoCommentAbsorb = true; + function AtRule(name, value, rules, index, currentFileInfo, debugInfo, isRooted, visibilityInfo) { + var _this; - expectChar(')'); + _classCallCheck(this, AtRule); - return new(tree.URL)((value.value != null || - value instanceof tree.Variable || - value instanceof tree.Property) ? - value : new(tree.Anonymous)(value, index), index, fileInfo); - }, + var i; + _this.name = name; + _this.value = value instanceof Node ? value : value ? new Anonymous(value) : value; - // - // A Variable entity, such as `@fink`, in - // - // width: @fink + 2px - // - // We use a different parser for variable definitions, - // see `parsers.variable`. - // - variable: function () { - var ch, name, index = parserInput.i; - - parserInput.save(); - if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\w-]+/))) { - ch = parserInput.currentChar(); - if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\s/)) { - // this may be a VariableCall lookup - var result = parsers.variableCall(name); - if (result) { - parserInput.forget(); - return result; - } - } - parserInput.forget(); - return new(tree.Variable)(name, index, fileInfo); - } - parserInput.restore(); - }, + if (rules) { + if (Array.isArray(rules)) { + _this.rules = rules; + } else { + _this.rules = [rules]; + _this.rules[0].selectors = new Selector([], null, null, index, currentFileInfo).createEmptySelectors(); + } - // A variable entity using the protective {} e.g. @{var} - variableCurly: function () { - var curly, index = parserInput.i; + for (i = 0; i < _this.rules.length; i++) { + _this.rules[i].allowImports = true; + } - if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\{([\w-]+)\}/))) { - return new(tree.Variable)('@' + curly[1], index, fileInfo); - } - }, - // - // A Property accessor, such as `$color`, in - // - // background-color: $color - // - property: function () { - var name, index = parserInput.i; - - if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\$[\w-]+/))) { - return new(tree.Property)(name, index, fileInfo); - } - }, + _this.setParent(_this.rules, _assertThisInitialized(_this)); + } - // A property entity useing the protective {} e.g. ${prop} - propertyCurly: function () { - var curly, index = parserInput.i; + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.debugInfo = debugInfo; + _this.isRooted = isRooted || false; - if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\$\{([\w-]+)\}/))) { - return new(tree.Property)('$' + curly[1], index, fileInfo); - } - }, - // - // A Hexadecimal color - // - // #4F3C2F - // - // `rgb` and `hsl` colors are parsed through the `entities.call` parser. - // - color: function () { - var rgb; - - if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})/))) { - return new(tree.Color)(rgb[1], undefined, rgb[0]); - } - }, + _this.copyVisibilityInfo(visibilityInfo); - colorKeyword: function () { - parserInput.save(); - var autoCommentAbsorb = parserInput.autoCommentAbsorb; - parserInput.autoCommentAbsorb = false; - var k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/); - parserInput.autoCommentAbsorb = autoCommentAbsorb; - if (!k) { - parserInput.forget(); - return; - } - parserInput.restore(); - var color = tree.Color.fromKeyword(k); - if (color) { - parserInput.$str(k); - return color; - } - }, + _this.allowRoot = true; + return _possibleConstructorReturn(_this); + } - // - // A Dimension, that is, a number and a unit - // - // 0.5em 95% - // - dimension: function () { - if (parserInput.peekNotNumeric()) { - return; - } + _createClass(AtRule, [{ + key: "accept", + value: function accept(visitor) { + var value = this.value; + var rules = this.rules; - var value = parserInput.$re(/^([+-]?\d*\.?\d+)(%|[a-z_]+)?/i); - if (value) { - return new(tree.Dimension)(value[1], value[2]); - } - }, + if (rules) { + this.rules = visitor.visitArray(rules); + } - // - // A unicode descriptor, as is used in unicode-range - // - // U+0?? or U+00A1-00A9 - // - unicodeDescriptor: function () { - var ud; - - ud = parserInput.$re(/^U\+[0-9a-fA-F?]+(\-[0-9a-fA-F?]+)?/); - if (ud) { - return new(tree.UnicodeDescriptor)(ud[0]); - } - }, + if (value) { + this.value = visitor.visit(value); + } + } + }, { + key: "isRulesetLike", + value: function isRulesetLike() { + return this.rules || !this.isCharset(); + } + }, { + key: "isCharset", + value: function isCharset() { + return '@charset' === this.name; + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + var value = this.value; + var rules = this.rules; + output.add(this.name, this.fileInfo(), this.getIndex()); - // - // JavaScript code to be evaluated - // - // `window.location.href` - // - javascript: function () { - var js, index = parserInput.i; + if (value) { + output.add(' '); + value.genCSS(context, output); + } - parserInput.save(); + if (rules) { + this.outputRuleset(context, output, rules); + } else { + output.add(';'); + } + } + }, { + key: "eval", + value: function _eval(context) { + var mediaPathBackup; + var mediaBlocksBackup; + var value = this.value; + var rules = this.rules; // media stored inside other atrule should not bubble over it + // backpup media bubbling information + + mediaPathBackup = context.mediaPath; + mediaBlocksBackup = context.mediaBlocks; // deleted media bubbling information - var escape = parserInput.$char('~'); - var jsQuote = parserInput.$char('`'); + context.mediaPath = []; + context.mediaBlocks = []; - if (!jsQuote) { - parserInput.restore(); - return; - } + if (value) { + value = value.eval(context); + } - js = parserInput.$re(/^[^`]*`/); - if (js) { - parserInput.forget(); - return new(tree.JavaScript)(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo); - } - parserInput.restore('invalid javascript definition'); - } - }, + if (rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + rules = [rules[0].eval(context)]; + rules[0].root = true; + } // restore media bubbling information - // - // The variable part of a variable definition. Used in the `rule` parser - // - // @fink: - // - variable: function () { - var name; - if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\w-]+)\s*:/))) { return name[1]; } - }, + context.mediaPath = mediaPathBackup; + context.mediaBlocks = mediaBlocksBackup; + return new AtRule(this.name, value, rules, this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo()); + } + }, { + key: "variable", + value: function variable(name) { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.variable.call(this.rules[0], name); + } + } + }, { + key: "find", + value: function find() { + if (this.rules) { + for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) { + args[_key] = arguments[_key]; + } - // - // Call a variable value to retrieve a detached ruleset - // or a value from a detached ruleset's rules. - // - // @fink(); - // @fink; - // color: @fink[@color]; - // - variableCall: function (parsedName) { - var lookups, important, i = parserInput.i, - inValue = !!parsedName, name = parsedName; + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.find.apply(this.rules[0], args); + } + } + }, { + key: "rulesets", + value: function rulesets() { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.rulesets.apply(this.rules[0]); + } + } + }, { + key: "outputRuleset", + value: function outputRuleset(context, output, rules) { + var ruleCnt = rules.length; + var i; + context.tabLevel = (context.tabLevel | 0) + 1; // Compressed - parserInput.save(); + if (context.compress) { + output.add('{'); - if (name || (parserInput.currentChar() === '@' - && (name = parserInput.$re(/^(@[\w-]+)(\(\s*\))?/)))) { + for (i = 0; i < ruleCnt; i++) { + rules[i].genCSS(context, output); + } - lookups = this.mixin.ruleLookups(); + output.add('}'); + context.tabLevel--; + return; + } // Non-compressed - if (!lookups && ((inValue && parserInput.$str('()') !== '()') || (name[2] !== '()'))) { - parserInput.restore('Missing \'[...]\' lookup in variable call'); - return; - } - if (!inValue) { - name = name[1]; - } + var tabSetStr = "\n".concat(Array(context.tabLevel).join(' ')); + var tabRuleStr = "".concat(tabSetStr, " "); - if (lookups && parsers.important()) { - important = true; - } + if (!ruleCnt) { + output.add(" {".concat(tabSetStr, "}")); + } else { + output.add(" {".concat(tabRuleStr)); + rules[0].genCSS(context, output); - var call = new tree.VariableCall(name, i, fileInfo); - if (!inValue && parsers.end()) { - parserInput.forget(); - return call; - } - else { - parserInput.forget(); - return new tree.NamespaceValue(call, lookups, important, i, fileInfo); - } - } + for (i = 1; i < ruleCnt; i++) { + output.add(tabRuleStr); + rules[i].genCSS(context, output); + } - parserInput.restore(); - }, + output.add("".concat(tabSetStr, "}")); + } - // - // extend syntax - used to extend selectors - // - extend: function(isRule) { - var elements, e, index = parserInput.i, option, extendList, extend; + context.tabLevel--; + } + }]); - if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) { - return; - } + return AtRule; + }(Node); - do { - option = null; - elements = null; - while (!(option = parserInput.$re(/^(all)(?=\s*(\)|,))/))) { - e = this.element(); - if (!e) { - break; - } - if (elements) { - elements.push(e); - } else { - elements = [ e ]; - } - } + AtRule.prototype.type = 'AtRule'; - option = option && option[1]; - if (!elements) { - error('Missing target selector for :extend().'); - } - extend = new(tree.Extend)(new(tree.Selector)(elements), option, index, fileInfo); - if (extendList) { - extendList.push(extend); - } else { - extendList = [ extend ]; - } - } while (parserInput.$char(',')); + var DetachedRuleset = + /*#__PURE__*/ + function (_Node) { + _inherits(DetachedRuleset, _Node); - expect(/^\)/); + function DetachedRuleset(ruleset, frames) { + var _this; - if (isRule) { - expect(/^;/); - } + _classCallCheck(this, DetachedRuleset); - return extendList; - }, + _this.ruleset = ruleset; + _this.frames = frames; - // - // extendRule - used in a rule to extend all the parent selectors - // - extendRule: function() { - return this.extend(true); - }, + _this.setParent(_this.ruleset, _assertThisInitialized(_this)); - // - // Mixins - // - mixin: { - // - // A Mixin call, with an optional argument list - // - // #mixins > .square(#fff); - // #mixins.square(#fff); - // .rounded(4px, black); - // .button; - // - // We can lookup / return a value using the lookup syntax: - // - // color: #mixin.square(#fff)[@color]; - // - // The `while` loop is there because mixins can be - // namespaced, but we only support the child and descendant - // selector for now. - // - call: function (inValue, getLookup) { - var s = parserInput.currentChar(), important = false, lookups, - index = parserInput.i, elements, args, hasParens; - - if (s !== '.' && s !== '#') { return; } - - parserInput.save(); // stop us absorbing part of an invalid selector - - elements = this.elements(); - - if (elements) { - if (parserInput.$char('(')) { - args = this.args(true).args; - expectChar(')'); - hasParens = true; - } - - if (getLookup !== false) { - lookups = this.ruleLookups(); - } - if (getLookup === true && !lookups) { - parserInput.restore(); - return; - } - - if (inValue && !lookups && !hasParens) { - // This isn't a valid in-value mixin call - parserInput.restore(); - return; - } - - if (!inValue && parsers.important()) { - important = true; - } - - if (inValue || parsers.end()) { - parserInput.forget(); - var mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important); - if (lookups) { - return new tree.NamespaceValue(mixin, lookups, important); - } - else { - return mixin; - } - } - } + return _possibleConstructorReturn(_this); + } - parserInput.restore(); - }, - /** - * Matching elements for mixins - * (Start with . or # and can have > ) - */ - elements: function() { - var elements, e, c, elem, elemIndex, - re = /^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/; - while (true) { - elemIndex = parserInput.i; - e = parserInput.$re(re); - - if (!e) { - break; - } - elem = new(tree.Element)(c, e, false, elemIndex, fileInfo); - if (elements) { - elements.push(elem); - } else { - elements = [ elem ]; - } - c = parserInput.$char('>'); - } - return elements; - }, - args: function (isCall) { - var entities = parsers.entities, - returner = { args:null, variadic: false }, - expressions = [], argsSemiColon = [], argsComma = [], - isSemiColonSeparated, expressionContainsNamed, name, nameLoop, - value, arg, expand, hasSep = true; - - parserInput.save(); - - while (true) { - if (isCall) { - arg = parsers.detachedRuleset() || parsers.expression(); - } else { - parserInput.commentStore.length = 0; - if (parserInput.$str('...')) { - returner.variadic = true; - if (parserInput.$char(';') && !isSemiColonSeparated) { - isSemiColonSeparated = true; - } - (isSemiColonSeparated ? argsSemiColon : argsComma) - .push({ variadic: true }); - break; - } - arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true); - } - - if (!arg || !hasSep) { - break; - } - - nameLoop = null; - if (arg.throwAwayComments) { - arg.throwAwayComments(); - } - value = arg; - var val = null; - - if (isCall) { - // Variable - if (arg.value && arg.value.length == 1) { - val = arg.value[0]; - } - } else { - val = arg; - } - - if (val && (val instanceof tree.Variable || val instanceof tree.Property)) { - if (parserInput.$char(':')) { - if (expressions.length > 0) { - if (isSemiColonSeparated) { - error('Cannot mix ; and , as delimiter types'); - } - expressionContainsNamed = true; - } - - value = parsers.detachedRuleset() || parsers.expression(); - - if (!value) { - if (isCall) { - error('could not understand value for named argument'); - } else { - parserInput.restore(); - returner.args = []; - return returner; - } - } - nameLoop = (name = val.name); - } else if (parserInput.$str('...')) { - if (!isCall) { - returner.variadic = true; - if (parserInput.$char(';') && !isSemiColonSeparated) { - isSemiColonSeparated = true; - } - (isSemiColonSeparated ? argsSemiColon : argsComma) - .push({ name: arg.name, variadic: true }); - break; - } else { - expand = true; - } - } else if (!isCall) { - name = nameLoop = val.name; - value = null; - } - } - - if (value) { - expressions.push(value); - } - - argsComma.push({ name:nameLoop, value:value, expand:expand }); - - if (parserInput.$char(',')) { - hasSep = true; - continue; - } - hasSep = parserInput.$char(';') === ';'; - - if (hasSep || isSemiColonSeparated) { - - if (expressionContainsNamed) { - error('Cannot mix ; and , as delimiter types'); - } - - isSemiColonSeparated = true; - - if (expressions.length > 1) { - value = new(tree.Value)(expressions); - } - argsSemiColon.push({ name:name, value:value, expand:expand }); - - name = null; - expressions = []; - expressionContainsNamed = false; - } - } + _createClass(DetachedRuleset, [{ + key: "accept", + value: function accept(visitor) { + this.ruleset = visitor.visit(this.ruleset); + } + }, { + key: "eval", + value: function _eval(context) { + var frames = this.frames || copyArray(context.frames); + return new DetachedRuleset(this.ruleset, frames); + } + }, { + key: "callEval", + value: function callEval(context) { + return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context); + } + }]); - parserInput.forget(); - returner.args = isSemiColonSeparated ? argsSemiColon : argsComma; - return returner; - }, - // - // A Mixin definition, with a list of parameters - // - // .rounded (@radius: 2px, @color) { - // ... - // } - // - // Until we have a finer grained state-machine, we have to - // do a look-ahead, to make sure we don't have a mixin call. - // See the `rule` function for more information. - // - // We start by matching `.rounded (`, and then proceed on to - // the argument list, which has optional default values. - // We store the parameters in `params`, with a `value` key, - // if there is a value, such as in the case of `@radius`. - // - // Once we've got our params list, and a closing `)`, we parse - // the `{...}` block. - // - definition: function () { - var name, params = [], match, ruleset, cond, variadic = false; - if ((parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#') || - parserInput.peek(/^[^{]*\}/)) { - return; - } + return DetachedRuleset; + }(Node); - parserInput.save(); + DetachedRuleset.prototype.type = 'DetachedRuleset'; + DetachedRuleset.prototype.evalFirst = true; - match = parserInput.$re(/^([#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/); - if (match) { - name = match[1]; + var Unit = + /*#__PURE__*/ + function (_Node) { + _inherits(Unit, _Node); - var argInfo = this.args(false); - params = argInfo.args; - variadic = argInfo.variadic; + function Unit(numerator, denominator, backupUnit) { + var _this; - // .mixincall("@{a}"); - // looks a bit like a mixin definition.. - // also - // .mixincall(@a: {rule: set;}); - // so we have to be nice and restore - if (!parserInput.$char(')')) { - parserInput.restore('Missing closing \')\''); - return; - } + _classCallCheck(this, Unit); - parserInput.commentStore.length = 0; + _this.numerator = numerator ? copyArray(numerator).sort() : []; + _this.denominator = denominator ? copyArray(denominator).sort() : []; - if (parserInput.$str('when')) { // Guard - cond = expect(parsers.conditions, 'expected condition'); - } + if (backupUnit) { + _this.backupUnit = backupUnit; + } else if (numerator && numerator.length) { + _this.backupUnit = numerator[0]; + } - ruleset = parsers.block(); + return _possibleConstructorReturn(_this); + } - if (ruleset) { - parserInput.forget(); - return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic); - } else { - parserInput.restore(); - } - } else { - parserInput.forget(); - } - }, - - ruleLookups: function() { - var rule, args, lookups = []; + _createClass(Unit, [{ + key: "clone", + value: function clone() { + return new Unit(copyArray(this.numerator), copyArray(this.denominator), this.backupUnit); + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + // Dimension checks the unit is singular and throws an error if in strict math mode. + var strictUnits = context && context.strictUnits; + + if (this.numerator.length === 1) { + output.add(this.numerator[0]); // the ideal situation + } else if (!strictUnits && this.backupUnit) { + output.add(this.backupUnit); + } else if (!strictUnits && this.denominator.length) { + output.add(this.denominator[0]); + } + } + }, { + key: "toString", + value: function toString() { + var i; + var returnStr = this.numerator.join('*'); - if (parserInput.currentChar() !== '[') { - return; - } - - while (true) { - parserInput.save(); - args = null; - rule = this.lookupValue(); - if (!rule && rule !== '') { - parserInput.restore(); - break; - } - lookups.push(rule); - parserInput.forget(); - } - if (lookups.length > 0) { - return lookups; - } - }, - - lookupValue: function() { - parserInput.save(); - - if (!parserInput.$char('[')) { - parserInput.restore(); - return; - } - - var name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/); - - if (!parserInput.$char(']')) { - parserInput.restore(); - return; - } - - if (name || name === '') { - parserInput.forget(); - return name; - } - - parserInput.restore(); - } - }, - // - // Entities are the smallest recognized token, - // and can be found inside a rule's value. - // - entity: function () { - var entities = this.entities; + for (i = 0; i < this.denominator.length; i++) { + returnStr += "/".concat(this.denominator[i]); + } - return this.comment() || entities.literal() || entities.variable() || entities.url() || - entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) || - entities.javascript(); - }, + return returnStr; + } + }, { + key: "compare", + value: function compare(other) { + return this.is(other.toString()) ? 0 : undefined; + } + }, { + key: "is", + value: function is(unitString) { + return this.toString().toUpperCase() === unitString.toUpperCase(); + } + }, { + key: "isLength", + value: function isLength() { + return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS()); + } + }, { + key: "isEmpty", + value: function isEmpty() { + return this.numerator.length === 0 && this.denominator.length === 0; + } + }, { + key: "isSingular", + value: function isSingular() { + return this.numerator.length <= 1 && this.denominator.length === 0; + } + }, { + key: "map", + value: function map(callback) { + var i; - // - // A Declaration terminator. Note that we use `peek()` to check for '}', - // because the `block` rule will be expecting it, but we still need to make sure - // it's there, if ';' was omitted. - // - end: function () { - return parserInput.$char(';') || parserInput.peek('}'); - }, + for (i = 0; i < this.numerator.length; i++) { + this.numerator[i] = callback(this.numerator[i], false); + } - // - // IE's alpha function - // - // alpha(opacity=88) - // - ieAlpha: function () { - var value; + for (i = 0; i < this.denominator.length; i++) { + this.denominator[i] = callback(this.denominator[i], true); + } + } + }, { + key: "usedUnits", + value: function usedUnits() { + var group; + var result = {}; + var mapUnit; + var groupName; + + mapUnit = function mapUnit(atomicUnit) { + /* jshint loopfunc:true */ + if (group.hasOwnProperty(atomicUnit) && !result[groupName]) { + result[groupName] = atomicUnit; + } - // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 - if (!parserInput.$re(/^opacity=/i)) { return; } - value = parserInput.$re(/^\d+/); - if (!value) { - value = expect(parsers.entities.variable, 'Could not parse alpha'); - value = '@{' + value.name.slice(1) + '}'; - } - expectChar(')'); - return new tree.Quoted('', 'alpha(opacity=' + value + ')'); - }, + return atomicUnit; + }; - // - // A Selector Element - // - // div - // + h1 - // #socks - // input[type="text"] - // - // Elements are the building blocks for Selectors, - // they are made out of a `Combinator` (see combinator rule), - // and an element name, such as a tag a class, or `*`. - // - element: function () { - var e, c, v, index = parserInput.i; - - c = this.combinator(); - - e = parserInput.$re(/^(?:\d+\.\d+|\d+)%/) || - parserInput.$re(/^(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) || - parserInput.$char('*') || parserInput.$char('&') || this.attribute() || - parserInput.$re(/^\([^&()@]+\)/) || parserInput.$re(/^[\.#:](?=@)/) || - this.entities.variableCurly(); - - if (!e) { - parserInput.save(); - if (parserInput.$char('(')) { - if ((v = this.selector(false)) && parserInput.$char(')')) { - e = new(tree.Paren)(v); - parserInput.forget(); - } else { - parserInput.restore('Missing closing \')\''); - } - } else { - parserInput.forget(); - } - } + for (groupName in unitConversions) { + if (unitConversions.hasOwnProperty(groupName)) { + group = unitConversions[groupName]; + this.map(mapUnit); + } + } - if (e) { return new(tree.Element)(c, e, e instanceof tree.Variable, index, fileInfo); } - }, + return result; + } + }, { + key: "cancel", + value: function cancel() { + var counter = {}; + var atomicUnit; + var i; - // - // Combinators combine elements together, in a Selector. - // - // Because our parser isn't white-space sensitive, special care - // has to be taken, when parsing the descendant combinator, ` `, - // as it's an empty space. We have to check the previous character - // in the input, to see if it's a ` ` character. More info on how - // we deal with this in *combinator.js*. - // - combinator: function () { - var c = parserInput.currentChar(); - - if (c === '/') { - parserInput.save(); - var slashedCombinator = parserInput.$re(/^\/[a-z]+\//i); - if (slashedCombinator) { - parserInput.forget(); - return new(tree.Combinator)(slashedCombinator); - } - parserInput.restore(); - } + for (i = 0; i < this.numerator.length; i++) { + atomicUnit = this.numerator[i]; + counter[atomicUnit] = (counter[atomicUnit] || 0) + 1; + } - if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') { - parserInput.i++; - if (c === '^' && parserInput.currentChar() === '^') { - c = '^^'; - parserInput.i++; - } - while (parserInput.isWhitespace()) { parserInput.i++; } - return new(tree.Combinator)(c); - } else if (parserInput.isWhitespace(-1)) { - return new(tree.Combinator)(' '); - } else { - return new(tree.Combinator)(null); - } - }, - // - // A CSS Selector - // with less extensions e.g. the ability to extend and guard - // - // .class > div + h1 - // li a:hover - // - // Selectors are made out of one or more Elements, see above. - // - selector: function (isLess) { - var index = parserInput.i, elements, extendList, c, e, allExtends, when, condition; - isLess = isLess !== false; - while ((isLess && (extendList = this.extend())) || (isLess && (when = parserInput.$str('when'))) || (e = this.element())) { - if (when) { - condition = expect(this.conditions, 'expected condition'); - } else if (condition) { - error('CSS guard can only be used at the end of selector'); - } else if (extendList) { - if (allExtends) { - allExtends = allExtends.concat(extendList); - } else { - allExtends = extendList; - } - } else { - if (allExtends) { error('Extend can only be used at the end of selector'); } - c = parserInput.currentChar(); - if (elements) { - elements.push(e); - } else { - elements = [ e ]; - } - e = null; - } - if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') { - break; - } - } + for (i = 0; i < this.denominator.length; i++) { + atomicUnit = this.denominator[i]; + counter[atomicUnit] = (counter[atomicUnit] || 0) - 1; + } - if (elements) { return new(tree.Selector)(elements, allExtends, condition, index, fileInfo); } - if (allExtends) { error('Extend must be used to extend a selector, it cannot be used on its own'); } - }, - selectors: function () { - var s, selectors; - while (true) { - s = this.selector(); - if (!s) { - break; - } - if (selectors) { - selectors.push(s); - } else { - selectors = [ s ]; - } - parserInput.commentStore.length = 0; - if (s.condition && selectors.length > 1) { - error("Guards are only currently allowed on a single selector."); - } - if (!parserInput.$char(',')) { break; } - if (s.condition) { - error("Guards are only currently allowed on a single selector."); - } - parserInput.commentStore.length = 0; - } - return selectors; - }, - attribute: function () { - if (!parserInput.$char('[')) { return; } + this.numerator = []; + this.denominator = []; - var entities = this.entities, - key, val, op; + for (atomicUnit in counter) { + if (counter.hasOwnProperty(atomicUnit)) { + var count = counter[atomicUnit]; - if (!(key = entities.variableCurly())) { - key = expect(/^(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\.)+/); - } + if (count > 0) { + for (i = 0; i < count; i++) { + this.numerator.push(atomicUnit); + } + } else if (count < 0) { + for (i = 0; i < -count; i++) { + this.denominator.push(atomicUnit); + } + } + } + } - op = parserInput.$re(/^[|~*$^]?=/); - if (op) { - val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\w-]+/) || entities.variableCurly(); - } + this.numerator.sort(); + this.denominator.sort(); + } + }]); - expectChar(']'); + return Unit; + }(Node); - return new(tree.Attribute)(key, op, val); - }, + Unit.prototype.type = 'Unit'; - // - // The `block` rule is used by `ruleset` and `mixin.definition`. - // It's a wrapper around the `primary` rule, with added `{}`. - // - block: function () { - var content; - if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) { - return content; - } - }, + // A number with a unit + // - blockRuleset: function() { - var block = this.block(); + var Dimension = + /*#__PURE__*/ + function (_Node) { + _inherits(Dimension, _Node); - if (block) { - block = new tree.Ruleset(null, block); - } - return block; - }, - - detachedRuleset: function() { - var argInfo, params, variadic; - - parserInput.save(); - if (parserInput.$re(/^[.#]\(/)) { - /** - * DR args currently only implemented for each() function, and not - * yet settable as `@dr: #(@arg) {}` - * This should be done when DRs are merged with mixins. - * See: https://github.com/less/less-meta/issues/16 - */ - argInfo = this.mixin.args(false); - params = argInfo.args; - variadic = argInfo.variadic; - if (!parserInput.$char(')')) { - parserInput.restore(); - return; - } - } - var blockRuleset = this.blockRuleset(); - if (blockRuleset) { - parserInput.forget(); - if (params) { - return new tree.mixin.Definition(null, params, blockRuleset, null, variadic); - } - return new tree.DetachedRuleset(blockRuleset); - } - parserInput.restore(); - }, + function Dimension(value, unit) { + var _this; - // - // div, .class, body > p {...} - // - ruleset: function () { - var selectors, rules, debugInfo; + _classCallCheck(this, Dimension); - parserInput.save(); + _this.value = parseFloat(value); - if (context.dumpLineNumbers) { - debugInfo = getDebugInfo(parserInput.i); - } + if (isNaN(_this.value)) { + throw new Error('Dimension is not a number.'); + } - selectors = this.selectors(); + _this.unit = unit && unit instanceof Unit ? unit : new Unit(unit ? [unit] : undefined); - if (selectors && (rules = this.block())) { - parserInput.forget(); - var ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports); - if (context.dumpLineNumbers) { - ruleset.debugInfo = debugInfo; - } - return ruleset; - } else { - parserInput.restore(); - } - }, - declaration: function () { - var name, value, index = parserInput.i, hasDR, - c = parserInput.currentChar(), important, merge, isVariable; + _this.setParent(_this.unit, _assertThisInitialized(_this)); - if (c === '.' || c === '#' || c === '&' || c === ':') { return; } + return _possibleConstructorReturn(_this); + } - parserInput.save(); + _createClass(Dimension, [{ + key: "accept", + value: function accept(visitor) { + this.unit = visitor.visit(this.unit); + } + }, { + key: "eval", + value: function _eval(context) { + return this; + } + }, { + key: "toColor", + value: function toColor() { + return new Color([this.value, this.value, this.value]); + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + if (context && context.strictUnits && !this.unit.isSingular()) { + throw new Error("Multiple units in dimension. Correct the units or use the unit function. Bad unit: ".concat(this.unit.toString())); + } - name = this.variable() || this.ruleProperty(); - if (name) { - isVariable = typeof name === 'string'; + var value = this.fround(context, this.value); + var strValue = String(value); - if (isVariable) { - value = this.detachedRuleset(); - if (value) { - hasDR = true; - } - } + if (value !== 0 && value < 0.000001 && value > -0.000001) { + // would be output 1e-6 etc. + strValue = value.toFixed(20).replace(/0+$/, ''); + } - parserInput.commentStore.length = 0; - if (!value) { - // a name returned by this.ruleProperty() is always an array of the form: - // [string-1, ..., string-n, ""] or [string-1, ..., string-n, "+"] - // where each item is a tree.Keyword or tree.Variable - merge = !isVariable && name.length > 1 && name.pop().value; - - // Custom property values get permissive parsing - if (name[0].value && name[0].value.slice(0, 2) === '--') { - value = this.permissiveValue(); - } - // Try to store values as anonymous - // If we need the value later we'll re-parse it in ruleset.parseValue - else { - value = this.anonymousValue(); - } - if (value) { - parserInput.forget(); - // anonymous values absorb the end ';' which is required for them to work - return new (tree.Declaration)(name, value, false, merge, index, fileInfo); - } - - if (!value) { - value = this.value(); - } - - if (value) { - important = this.important(); - } else if (isVariable) { - // As a last resort, try permissiveValue - value = this.permissiveValue(); - } - } + if (context && context.compress) { + // Zero values doesn't need a unit + if (value === 0 && this.unit.isLength()) { + output.add(strValue); + return; + } // Float values doesn't need a leading zero - if (value && (this.end() || hasDR)) { - parserInput.forget(); - return new (tree.Declaration)(name, value, important, merge, index, fileInfo); - } - else { - parserInput.restore(); - } - } else { - parserInput.restore(); - } - }, - anonymousValue: function () { - var index = parserInput.i; - var match = parserInput.$re(/^([^.#@\$+\/'"*`(;{}-]*);/); - if (match) { - return new(tree.Anonymous)(match[1], index); - } - }, - /** - * Used for custom properties, at-rules, and variables (as fallback) - * Parses almost anything inside of {} [] () "" blocks - * until it reaches outer-most tokens. - * - * First, it will try to parse comments and entities to reach - * the end. This is mostly like the Expression parser except no - * math is allowed. - */ - permissiveValue: function (untilTokens) { - var i, e, done, value, - tok = untilTokens || ';', - index = parserInput.i, result = []; - - function testCurrentChar() { - var char = parserInput.currentChar(); - if (typeof tok === 'string') { - return char === tok; - } else { - return tok.test(char); - } - } - if (testCurrentChar()) { - return; - } - value = []; - do { - e = this.comment(); - if (e) { - value.push(e); - continue; - } - e = this.entity(); - if (e) { - value.push(e); - } - } while (e); - - done = testCurrentChar(); - - if (value.length > 0) { - value = new(tree.Expression)(value); - if (done) { - return value; - } - else { - result.push(value); - } - // Preserve space before $parseUntil as it will not - if (parserInput.prevChar() === ' ') { - result.push(new tree.Anonymous(' ', index)); - } - } - parserInput.save(); - - value = parserInput.$parseUntil(tok); - if (value) { - if (typeof value === 'string') { - error('Expected \'' + value + '\'', 'Parse'); - } - if (value.length === 1 && value[0] === ' ') { - parserInput.forget(); - return new tree.Anonymous('', index); - } - var item; - for (i = 0; i < value.length; i++) { - item = value[i]; - if (Array.isArray(item)) { - // Treat actual quotes as normal quoted values - result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo)); - } - else { - if (i === value.length - 1) { - item = item.trim(); - } - // Treat like quoted values, but replace vars like unquoted expressions - var quote = new tree.Quoted('\'', item, true, index, fileInfo); - quote.variableRegex = /@([\w-]+)/g; - quote.propRegex = /\$([\w-]+)/g; - result.push(quote); - } - } - parserInput.forget(); - return new tree.Expression(result, true); - } - parserInput.restore(); - }, + if (value > 0 && value < 1) { + strValue = strValue.substr(1); + } + } - // - // An @import atrule - // - // @import "lib"; - // - // Depending on our environment, importing is done differently: - // In the browser, it's an XHR request, in Node, it would be a - // file-system operation. The function used for importing is - // stored in `import`, which we pass to the Import constructor. - // - 'import': function () { - var path, features, index = parserInput.i; + output.add(strValue); + this.unit.genCSS(context, output); + } // In an operation between two Dimensions, + // we default to the first Dimension's unit, + // so `1px + 2` will yield `3px`. - var dir = parserInput.$re(/^@import?\s+/); + }, { + key: "operate", + value: function operate(context, op, other) { + /* jshint noempty:false */ + var value = this._operate(context, op, this.value, other.value); - if (dir) { - var options = (dir ? this.importOptions() : null) || {}; + var unit = this.unit.clone(); - if ((path = this.entities.quoted() || this.entities.url())) { - features = this.mediaFeatures(); + if (op === '+' || op === '-') { + if (unit.numerator.length === 0 && unit.denominator.length === 0) { + unit = other.unit.clone(); - if (!parserInput.$char(';')) { - parserInput.i = index; - error('missing semi-colon or unrecognised media features on import'); - } - features = features && new(tree.Value)(features); - return new(tree.Import)(path, features, options, index, fileInfo); - } - else { - parserInput.i = index; - error('malformed import statement'); - } - } - }, - - importOptions: function() { - var o, options = {}, optionName, value; - - // list of options, surrounded by parens - if (!parserInput.$char('(')) { return null; } - do { - o = this.importOption(); - if (o) { - optionName = o; - value = true; - switch (optionName) { - case 'css': - optionName = 'less'; - value = false; - break; - case 'once': - optionName = 'multiple'; - value = false; - break; - } - options[optionName] = value; - if (!parserInput.$char(',')) { break; } - } - } while (o); - expectChar(')'); - return options; - }, + if (this.unit.backupUnit) { + unit.backupUnit = this.unit.backupUnit; + } + } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) ; else { + other = other.convertTo(this.unit.usedUnits()); - importOption: function() { - var opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/); - if (opt) { - return opt[1]; - } - }, - - mediaFeature: function () { - var entities = this.entities, nodes = [], e, p; - parserInput.save(); - do { - e = entities.keyword() || entities.variable() || entities.mixinLookup(); - if (e) { - nodes.push(e); - } else if (parserInput.$char('(')) { - p = this.property(); - e = this.value(); - if (parserInput.$char(')')) { - if (p && e) { - nodes.push(new(tree.Paren)(new(tree.Declaration)(p, e, null, null, parserInput.i, fileInfo, true))); - } else if (e) { - nodes.push(new(tree.Paren)(e)); - } else { - error('badly formed media feature definition'); - } - } else { - error('Missing closing \')\'', 'Parse'); - } - } - } while (e); + if (context.strictUnits && other.unit.toString() !== unit.toString()) { + throw new Error("Incompatible units. Change the units or use the unit function. Bad units: '".concat(unit.toString(), "' and '").concat(other.unit.toString(), "'.")); + } - parserInput.forget(); - if (nodes.length > 0) { - return new(tree.Expression)(nodes); - } - }, - - mediaFeatures: function () { - var entities = this.entities, features = [], e; - do { - e = this.mediaFeature(); - if (e) { - features.push(e); - if (!parserInput.$char(',')) { break; } - } else { - e = entities.variable() || entities.mixinLookup(); - if (e) { - features.push(e); - if (!parserInput.$char(',')) { break; } - } - } - } while (e); + value = this._operate(context, op, this.value, other.value); + } + } else if (op === '*') { + unit.numerator = unit.numerator.concat(other.unit.numerator).sort(); + unit.denominator = unit.denominator.concat(other.unit.denominator).sort(); + unit.cancel(); + } else if (op === '/') { + unit.numerator = unit.numerator.concat(other.unit.denominator).sort(); + unit.denominator = unit.denominator.concat(other.unit.numerator).sort(); + unit.cancel(); + } - return features.length > 0 ? features : null; - }, + return new Dimension(value, unit); + } + }, { + key: "compare", + value: function compare(other) { + var a; + var b; - media: function () { - var features, rules, media, debugInfo, index = parserInput.i; + if (!(other instanceof Dimension)) { + return undefined; + } - if (context.dumpLineNumbers) { - debugInfo = getDebugInfo(index); - } + if (this.unit.isEmpty() || other.unit.isEmpty()) { + a = this; + b = other; + } else { + a = this.unify(); + b = other.unify(); - parserInput.save(); + if (a.unit.compare(b.unit) !== 0) { + return undefined; + } + } - if (parserInput.$str('@media')) { - features = this.mediaFeatures(); + return Node.numericCompare(a.value, b.value); + } + }, { + key: "unify", + value: function unify() { + return this.convertTo({ + length: 'px', + duration: 's', + angle: 'rad' + }); + } + }, { + key: "convertTo", + value: function convertTo(conversions) { + var value = this.value; + var unit = this.unit.clone(); + var i; + var groupName; + var group; + var targetUnit; + var derivedConversions = {}; + var applyUnit; + + if (typeof conversions === 'string') { + for (i in unitConversions) { + if (unitConversions[i].hasOwnProperty(conversions)) { + derivedConversions = {}; + derivedConversions[i] = conversions; + } + } - rules = this.block(); + conversions = derivedConversions; + } - if (!rules) { - error('media definitions require block statements after any features'); - } + applyUnit = function applyUnit(atomicUnit, denominator) { + /* jshint loopfunc:true */ + if (group.hasOwnProperty(atomicUnit)) { + if (denominator) { + value = value / (group[atomicUnit] / group[targetUnit]); + } else { + value = value * (group[atomicUnit] / group[targetUnit]); + } - parserInput.forget(); + return targetUnit; + } - media = new(tree.Media)(rules, features, index, fileInfo); - if (context.dumpLineNumbers) { - media.debugInfo = debugInfo; - } + return atomicUnit; + }; - return media; - } + for (groupName in conversions) { + if (conversions.hasOwnProperty(groupName)) { + targetUnit = conversions[groupName]; + group = unitConversions[groupName]; + unit.map(applyUnit); + } + } - parserInput.restore(); - }, + unit.cancel(); + return new Dimension(value, unit); + } + }]); - // + return Dimension; + }(Node); - // A @plugin directive, used to import plugins dynamically. - // - // @plugin (args) "lib"; - // - plugin: function () { - var path, args, options, - index = parserInput.i, - dir = parserInput.$re(/^@plugin?\s+/); - - if (dir) { - args = this.pluginArgs(); - - if (args) { - options = { - pluginArgs: args, - isPlugin: true - }; - } - else { - options = { isPlugin: true }; - } + Dimension.prototype.type = 'Dimension'; - if ((path = this.entities.quoted() || this.entities.url())) { + var MATH$1 = Math$1; - if (!parserInput.$char(';')) { - parserInput.i = index; - error('missing semi-colon on @plugin'); - } - return new(tree.Import)(path, null, options, index, fileInfo); - } - else { - parserInput.i = index; - error('malformed @plugin statement'); - } - } - }, - - pluginArgs: function() { - // list of options, surrounded by parens - parserInput.save(); - if (!parserInput.$char('(')) { - parserInput.restore(); - return null; - } - var args = parserInput.$re(/^\s*([^\);]+)\)\s*/); - if (args[1]) { - parserInput.forget(); - return args[1].trim(); - } - else { - parserInput.restore(); - return null; - } - }, + var Operation = + /*#__PURE__*/ + function (_Node) { + _inherits(Operation, _Node); - // - // A CSS AtRule - // - // @charset "utf-8"; - // - atrule: function () { - var index = parserInput.i, name, value, rules, nonVendorSpecificName, - hasIdentifier, hasExpression, hasUnknown, hasBlock = true, isRooted = true; + function Operation(op, operands, isSpaced) { + var _this; - if (parserInput.currentChar() !== '@') { return; } + _classCallCheck(this, Operation); - value = this['import']() || this.plugin() || this.media(); - if (value) { - return value; - } + _this.op = op.trim(); + _this.operands = operands; + _this.isSpaced = isSpaced; + return _possibleConstructorReturn(_this); + } - parserInput.save(); + _createClass(Operation, [{ + key: "accept", + value: function accept(visitor) { + this.operands = visitor.visitArray(this.operands); + } + }, { + key: "eval", + value: function _eval(context) { + var a = this.operands[0].eval(context); + var b = this.operands[1].eval(context); + var op; - name = parserInput.$re(/^@[a-z-]+/); + if (context.isMathOn(this.op)) { + op = this.op === './' ? '/' : this.op; - if (!name) { return; } + if (a instanceof Dimension && b instanceof Color) { + a = a.toColor(); + } - nonVendorSpecificName = name; - if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) { - nonVendorSpecificName = '@' + name.slice(name.indexOf('-', 2) + 1); - } + if (b instanceof Dimension && a instanceof Color) { + b = b.toColor(); + } - switch (nonVendorSpecificName) { - case '@charset': - hasIdentifier = true; - hasBlock = false; - break; - case '@namespace': - hasExpression = true; - hasBlock = false; - break; - case '@keyframes': - case '@counter-style': - hasIdentifier = true; - break; - case '@document': - case '@supports': - hasUnknown = true; - isRooted = false; - break; - default: - hasUnknown = true; - break; - } + if (!a.operate) { + if (a instanceof Operation && a.op === '/' && context.math === MATH$1.PARENS_DIVISION) { + return new Operation(this.op, [a, b], this.isSpaced); + } - parserInput.commentStore.length = 0; + throw { + type: 'Operation', + message: 'Operation on an invalid type' + }; + } - if (hasIdentifier) { - value = this.entity(); - if (!value) { - error('expected ' + name + ' identifier'); - } - } else if (hasExpression) { - value = this.expression(); - if (!value) { - error('expected ' + name + ' expression'); - } - } else if (hasUnknown) { - value = this.permissiveValue(/^[{;]/); - hasBlock = (parserInput.currentChar() === '{'); - if (!value) { - if (!hasBlock && parserInput.currentChar() !== ';') { - error(name + ' rule is missing block or ending semi-colon'); - } - } - else if (!value.value) { - value = null; - } - } + return a.operate(context, op, b); + } else { + return new Operation(this.op, [a, b], this.isSpaced); + } + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + this.operands[0].genCSS(context, output); - if (hasBlock) { - rules = this.blockRuleset(); - } + if (this.isSpaced) { + output.add(' '); + } - if (rules || (!hasBlock && value && parserInput.$char(';'))) { - parserInput.forget(); - return new (tree.AtRule)(name, value, rules, index, fileInfo, - context.dumpLineNumbers ? getDebugInfo(index) : null, - isRooted - ); - } + output.add(this.op); - parserInput.restore('at-rule options not recognised'); - }, + if (this.isSpaced) { + output.add(' '); + } - // - // A Value is a comma-delimited list of Expressions - // - // font-family: Baskerville, Georgia, serif; - // - // In a Rule, a Value represents everything after the `:`, - // and before the `;`. - // - value: function () { - var e, expressions = [], index = parserInput.i; - - do { - e = this.expression(); - if (e) { - expressions.push(e); - if (!parserInput.$char(',')) { break; } - } - } while (e); + this.operands[1].genCSS(context, output); + } + }]); - if (expressions.length > 0) { - return new(tree.Value)(expressions, index); - } - }, - important: function () { - if (parserInput.currentChar() === '!') { - return parserInput.$re(/^! *important/); - } - }, - sub: function () { - var a, e; - - parserInput.save(); - if (parserInput.$char('(')) { - a = this.addition(); - if (a && parserInput.$char(')')) { - parserInput.forget(); - e = new(tree.Expression)([a]); - e.parens = true; - return e; - } - parserInput.restore('Expected \')\''); - return; - } - parserInput.restore(); - }, - multiplication: function () { - var m, a, op, operation, isSpaced; - m = this.operand(); - if (m) { - isSpaced = parserInput.isWhitespace(-1); - while (true) { - if (parserInput.peek(/^\/[*\/]/)) { - break; - } + return Operation; + }(Node); - parserInput.save(); + Operation.prototype.type = 'Operation'; - op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./'); + var MATH$2 = Math$1; - if (!op) { parserInput.forget(); break; } + var Expression = + /*#__PURE__*/ + function (_Node) { + _inherits(Expression, _Node); - a = this.operand(); + function Expression(value, noSpacing) { + var _this; - if (!a) { parserInput.restore(); break; } - parserInput.forget(); + _classCallCheck(this, Expression); - m.parensInOp = true; - a.parensInOp = true; - operation = new(tree.Operation)(op, [operation || m, a], isSpaced); - isSpaced = parserInput.isWhitespace(-1); - } - return operation || m; - } - }, - addition: function () { - var m, a, op, operation, isSpaced; - m = this.multiplication(); - if (m) { - isSpaced = parserInput.isWhitespace(-1); - while (true) { - op = parserInput.$re(/^[-+]\s+/) || (!isSpaced && (parserInput.$char('+') || parserInput.$char('-'))); - if (!op) { - break; - } - a = this.multiplication(); - if (!a) { - break; - } - - m.parensInOp = true; - a.parensInOp = true; - operation = new(tree.Operation)(op, [operation || m, a], isSpaced); - isSpaced = parserInput.isWhitespace(-1); - } - return operation || m; - } - }, - conditions: function () { - var a, b, index = parserInput.i, condition; - - a = this.condition(true); - if (a) { - while (true) { - if (!parserInput.peek(/^,\s*(not\s*)?\(/) || !parserInput.$char(',')) { - break; - } - b = this.condition(true); - if (!b) { - break; - } - condition = new(tree.Condition)('or', condition || a, b, index); - } - return condition || a; - } - }, - condition: function (needsParens) { - var result, logical, next; - function or() { - return parserInput.$str('or'); - } + _this.value = value; + _this.noSpacing = noSpacing; - result = this.conditionAnd(needsParens); - if (!result) { - return ; - } - logical = or(); - if (logical) { - next = this.condition(needsParens); - if (next) { - result = new(tree.Condition)(logical, result, next); - } else { - return ; - } - } - return result; - }, - conditionAnd: function (needsParens) { - var result, logical, next, self = this; - function insideCondition() { - var cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens); - if (!cond && !needsParens) { - return self.atomicCondition(needsParens); - } - return cond; - } - function and() { - return parserInput.$str('and'); - } + if (!value) { + throw new Error('Expression requires an array parameter'); + } - result = insideCondition(); - if (!result) { - return ; - } - logical = and(); - if (logical) { - next = this.conditionAnd(needsParens); - if (next) { - result = new(tree.Condition)(logical, result, next); - } else { - return ; - } - } - return result; - }, - negatedCondition: function (needsParens) { - if (parserInput.$str('not')) { - var result = this.parenthesisCondition(needsParens); - if (result) { - result.negate = !result.negate; - } - return result; - } - }, - parenthesisCondition: function (needsParens) { - function tryConditionFollowedByParenthesis(me) { - var body; - parserInput.save(); - body = me.condition(needsParens); - if (!body) { - parserInput.restore(); - return ; - } - if (!parserInput.$char(')')) { - parserInput.restore(); - return ; - } - parserInput.forget(); - return body; - } + return _possibleConstructorReturn(_this); + } - var body; - parserInput.save(); - if (!parserInput.$str('(')) { - parserInput.restore(); - return ; - } - body = tryConditionFollowedByParenthesis(this); - if (body) { - parserInput.forget(); - return body; - } + _createClass(Expression, [{ + key: "accept", + value: function accept(visitor) { + this.value = visitor.visitArray(this.value); + } + }, { + key: "eval", + value: function _eval(context) { + var returnValue; + var mathOn = context.isMathOn(); + var inParenthesis = this.parens && (context.math !== MATH$2.STRICT_LEGACY || !this.parensInOp); + var doubleParen = false; - body = this.atomicCondition(needsParens); - if (!body) { - parserInput.restore(); - return ; - } - if (!parserInput.$char(')')) { - parserInput.restore('expected \')\' got \'' + parserInput.currentChar() + '\''); - return ; - } - parserInput.forget(); - return body; - }, - atomicCondition: function (needsParens) { - var entities = this.entities, index = parserInput.i, a, b, c, op; + if (inParenthesis) { + context.inParenthesis(); + } - function cond() { - return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup(); - } - cond = cond.bind(this); - - a = cond(); - if (a) { - if (parserInput.$char('>')) { - if (parserInput.$char('=')) { - op = '>='; - } else { - op = '>'; - } - } else - if (parserInput.$char('<')) { - if (parserInput.$char('=')) { - op = '<='; - } else { - op = '<'; - } - } else - if (parserInput.$char('=')) { - if (parserInput.$char('>')) { - op = '=>'; - } else if (parserInput.$char('<')) { - op = '=<'; - } else { - op = '='; - } - } - if (op) { - b = cond(); - if (b) { - c = new(tree.Condition)(op, a, b, index, false); - } else { - error('expected expression'); - } - } else { - c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, false); - } - return c; - } - }, + if (this.value.length > 1) { + returnValue = new Expression(this.value.map(function (e) { + if (!e.eval) { + return e; + } - // - // An operand is anything that can be part of an operation, - // such as a Color, or a Variable - // - operand: function () { - var entities = this.entities, negate; + return e.eval(context); + }), this.noSpacing); + } else if (this.value.length === 1) { + if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) { + doubleParen = true; + } - if (parserInput.peek(/^-[@\$\(]/)) { - negate = parserInput.$char('-'); - } + returnValue = this.value[0].eval(context); + } else { + returnValue = this; + } - var o = this.sub() || entities.dimension() || - entities.color() || entities.variable() || - entities.property() || entities.call() || - entities.quoted(true) || entities.colorKeyword() || - entities.mixinLookup(); + if (inParenthesis) { + context.outOfParenthesis(); + } - if (negate) { - o.parensInOp = true; - o = new(tree.Negative)(o); - } + if (this.parens && this.parensInOp && !mathOn && !doubleParen && !(returnValue instanceof Dimension)) { + returnValue = new Paren(returnValue); + } - return o; - }, + return returnValue; + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + for (var i = 0; i < this.value.length; i++) { + this.value[i].genCSS(context, output); - // - // Expressions either represent mathematical operations, - // or white-space delimited Entities. - // - // 1px solid black - // @var * 2 - // - expression: function () { - var entities = [], e, delim, index = parserInput.i; - - do { - e = this.comment(); - if (e) { - entities.push(e); - continue; - } - e = this.addition() || this.entity(); - if (e) { - entities.push(e); - // operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here - if (!parserInput.peek(/^\/[\/*]/)) { - delim = parserInput.$char('/'); - if (delim) { - entities.push(new(tree.Anonymous)(delim, index)); - } - } - } - } while (e); - if (entities.length > 0) { - return new(tree.Expression)(entities); - } - }, - property: function () { - var name = parserInput.$re(/^(\*?-?[_a-zA-Z0-9-]+)\s*:/); - if (name) { - return name[1]; - } - }, - ruleProperty: function () { - var name = [], index = [], s, k; + if (!this.noSpacing && i + 1 < this.value.length) { + output.add(' '); + } + } + } + }, { + key: "throwAwayComments", + value: function throwAwayComments() { + this.value = this.value.filter(function (v) { + return !(v instanceof Comment); + }); + } + }]); - parserInput.save(); + return Expression; + }(Node); - var simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\s*:/); - if (simpleProperty) { - name = [new(tree.Keyword)(simpleProperty[1])]; - parserInput.forget(); - return name; - } + Expression.prototype.type = 'Expression'; - function match(re) { - var i = parserInput.i, - chunk = parserInput.$re(re); - if (chunk) { - index.push(i); - return name.push(chunk[1]); - } - } + var functionCaller = + /*#__PURE__*/ + function () { + function functionCaller(name, context, index, currentFileInfo) { + _classCallCheck(this, functionCaller); - match(/^(\*?)/); - while (true) { - if (!match(/^((?:[\w-]+)|(?:[@\$]\{[\w-]+\}))/)) { - break; - } - } + this.name = name.toLowerCase(); + this.index = index; + this.context = context; + this.currentFileInfo = currentFileInfo; + this.func = context.frames[0].functionRegistry.get(this.name); + } - if ((name.length > 1) && match(/^((?:\+_|\+)?)\s*:/)) { - parserInput.forget(); + _createClass(functionCaller, [{ + key: "isValid", + value: function isValid() { + return Boolean(this.func); + } + }, { + key: "call", + value: function call(args) { + // This code is terrible and should be replaced as per this issue... + // https://github.com/less/less.js/issues/2477 + if (Array.isArray(args)) { + args = args.filter(function (item) { + if (item.type === 'Comment') { + return false; + } - // at last, we have the complete match now. move forward, - // convert name particles to tree objects and return: - if (name[0] === '') { - name.shift(); - index.shift(); - } - for (k = 0; k < name.length; k++) { - s = name[k]; - name[k] = (s.charAt(0) !== '@' && s.charAt(0) !== '$') ? - new(tree.Keyword)(s) : - (s.charAt(0) === '@' ? - new(tree.Variable)('@' + s.slice(2, -1), index[k], fileInfo) : - new(tree.Property)('$' + s.slice(2, -1), index[k], fileInfo)); - } - return name; + return true; + }).map(function (item) { + if (item.type === 'Expression') { + var subNodes = item.value.filter(function (item) { + if (item.type === 'Comment') { + return false; } - parserInput.restore(); + + return true; + }); + + if (subNodes.length === 1) { + return subNodes[0]; + } else { + return new Expression(subNodes); + } } - } - }; -}; -Parser.serializeVars = function(vars) { - var s = ''; - for (var name in vars) { - if (Object.hasOwnProperty.call(vars, name)) { - var value = vars[name]; - s += ((name[0] === '@') ? '' : '@') + name + ': ' + value + - ((String(value).slice(-1) === ';') ? '' : ';'); + return item; + }); } - } - return s; -}; - -module.exports = Parser; - -},{"../functions/function-registry":27,"../less-error":38,"../tree":67,"../utils":89,"../visitors":93,"./parser-input":43}],45:[function(require,module,exports){ -/** - * Plugin Manager - */ -var PluginManager = function(less) { - this.less = less; - this.visitors = []; - this.preProcessors = []; - this.postProcessors = []; - this.installedPlugins = []; - this.fileManagers = []; - this.iterator = -1; - this.pluginCache = {}; - this.Loader = new less.PluginLoader(less); -}; - -var pm, PluginManagerFactory = function(less, newFactory) { - if (newFactory || !pm) { - pm = new PluginManager(less); - } - return pm; - }; + return this.func.apply(this, _toConsumableArray(args)); + } + }]); + + return functionCaller; + }(); + + // A function call node. + // + + var Call = + /*#__PURE__*/ + function (_Node) { + _inherits(Call, _Node); + + function Call(name, args, index, currentFileInfo) { + var _this; + + _classCallCheck(this, Call); + + _this.name = name; + _this.args = args; + _this.calc = name === 'calc'; + _this._index = index; + _this._fileInfo = currentFileInfo; + return _possibleConstructorReturn(_this); + } + + _createClass(Call, [{ + key: "accept", + value: function accept(visitor) { + if (this.args) { + this.args = visitor.visitArray(this.args); + } + } // + // When evaluating a function call, + // we either find the function in the functionRegistry, + // in which case we call it, passing the evaluated arguments, + // if this returns null or we cannot find the function, we + // simply print it out as it appeared originally [2]. + // + // The reason why we evaluate the arguments, is in the case where + // we try to pass a variable to a function, like: `saturate(@color)`. + // The function should receive the value, not the variable. + // + + }, { + key: "eval", + value: function _eval(context) { + /** + * Turn off math for calc(), and switch back on for evaluating nested functions + */ + var currentMathContext = context.mathOn; + context.mathOn = !this.calc; -/** - * Adds all the plugins in the array - * @param {Array} plugins - */ -PluginManager.prototype.addPlugins = function(plugins) { - if (plugins) { - for (var i = 0; i < plugins.length; i++) { - this.addPlugin(plugins[i]); - } - } -}; -/** - * - * @param plugin - * @param {String} filename - */ -PluginManager.prototype.addPlugin = function(plugin, filename, functionRegistry) { - this.installedPlugins.push(plugin); - if (filename) { - this.pluginCache[filename] = plugin; - } - if (plugin.install) { - plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry); - } -}; -/** - * - * @param filename - */ -PluginManager.prototype.get = function(filename) { - return this.pluginCache[filename]; -}; - -/** - * Adds a visitor. The visitor object has options on itself to determine - * when it should run. - * @param visitor - */ -PluginManager.prototype.addVisitor = function(visitor) { - this.visitors.push(visitor); -}; -/** - * Adds a pre processor object - * @param {object} preProcessor - * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import - */ -PluginManager.prototype.addPreProcessor = function(preProcessor, priority) { - var indexToInsertAt; - for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) { - if (this.preProcessors[indexToInsertAt].priority >= priority) { - break; + if (this.calc || context.inCalc) { + context.enterCalc(); } - } - this.preProcessors.splice(indexToInsertAt, 0, {preProcessor: preProcessor, priority: priority}); -}; -/** - * Adds a post processor object - * @param {object} postProcessor - * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression - */ -PluginManager.prototype.addPostProcessor = function(postProcessor, priority) { - var indexToInsertAt; - for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) { - if (this.postProcessors[indexToInsertAt].priority >= priority) { - break; - } - } - this.postProcessors.splice(indexToInsertAt, 0, {postProcessor: postProcessor, priority: priority}); -}; -/** - * - * @param manager - */ -PluginManager.prototype.addFileManager = function(manager) { - this.fileManagers.push(manager); -}; -/** - * - * @returns {Array} - * @private - */ -PluginManager.prototype.getPreProcessors = function() { - var preProcessors = []; - for (var i = 0; i < this.preProcessors.length; i++) { - preProcessors.push(this.preProcessors[i].preProcessor); - } - return preProcessors; -}; -/** - * - * @returns {Array} - * @private - */ -PluginManager.prototype.getPostProcessors = function() { - var postProcessors = []; - for (var i = 0; i < this.postProcessors.length; i++) { - postProcessors.push(this.postProcessors[i].postProcessor); - } - return postProcessors; -}; -/** - * - * @returns {Array} - * @private - */ -PluginManager.prototype.getVisitors = function() { - return this.visitors; -}; - -PluginManager.prototype.visitor = function() { - var self = this; - return { - first: function() { - self.iterator = -1; - return self.visitors[self.iterator]; - }, - get: function() { - self.iterator += 1; - return self.visitors[self.iterator]; - } - }; -}; -/** - * - * @returns {Array} - * @private - */ -PluginManager.prototype.getFileManagers = function() { - return this.fileManagers; -}; - -// -module.exports = PluginManagerFactory; - -},{}],46:[function(require,module,exports){ -var PromiseConstructor, - utils = require('./utils'); - -module.exports = function(environment, ParseTree, ImportManager) { - var render = function (input, options, callback) { - if (typeof options === 'function') { - callback = options; - options = utils.copyOptions(this.options, {}); - } - else { - options = utils.copyOptions(this.options, options || {}); + + var args = this.args.map(function (a) { + return a.eval(context); + }); + + if (this.calc || context.inCalc) { + context.exitCalc(); } - if (!callback) { - if (!PromiseConstructor) { - PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; + context.mathOn = currentMathContext; + var result; + var funcCaller = new functionCaller(this.name, context, this.getIndex(), this.fileInfo()); + + if (funcCaller.isValid()) { + try { + result = funcCaller.call(args); + } catch (e) { + throw { + type: e.type || 'Runtime', + message: "error evaluating function `".concat(this.name, "`").concat(e.message ? ": ".concat(e.message) : ''), + index: this.getIndex(), + filename: this.fileInfo().filename, + line: e.lineNumber, + column: e.columnNumber + }; + } + + if (result !== null && result !== undefined) { + // Results that that are not nodes are cast as Anonymous nodes + // Falsy values or booleans are returned as empty nodes + if (!(result instanceof Node)) { + if (!result || result === true) { + result = new Anonymous(null); + } else { + result = new Anonymous(result.toString()); + } } - var self = this; - return new PromiseConstructor(function (resolve, reject) { - render.call(self, input, options, function(err, output) { - if (err) { - reject(err); - } else { - resolve(output); - } - }); - }); - } else { - this.parse(input, options, function(err, root, imports, options) { - if (err) { return callback(err); } - var result; - try { - var parseTree = new ParseTree(root, imports); - result = parseTree.toCSS(options); - } - catch (err) { return callback(err); } + result._index = this._index; + result._fileInfo = this._fileInfo; + return result; + } + } - callback(null, result); - }); + return new Call(this.name, args, this.getIndex(), this.fileInfo()); + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + output.add("".concat(this.name, "("), this.fileInfo(), this.getIndex()); + + for (var i = 0; i < this.args.length; i++) { + this.args[i].genCSS(context, output); + + if (i + 1 < this.args.length) { + output.add(', '); + } } - }; - return render; -}; + output.add(')'); + } + }]); -},{"./utils":89,"promise":undefined}],47:[function(require,module,exports){ -module.exports = function (SourceMapOutput, environment) { + return Call; + }(Node); - var SourceMapBuilder = function (options) { - this.options = options; - }; + Call.prototype.type = 'Call'; - SourceMapBuilder.prototype.toCSS = function(rootNode, options, imports) { - var sourceMapOutput = new SourceMapOutput( - { - contentsIgnoredCharsMap: imports.contentsIgnoredChars, - rootNode: rootNode, - contentsMap: imports.contents, - sourceMapFilename: this.options.sourceMapFilename, - sourceMapURL: this.options.sourceMapURL, - outputFilename: this.options.sourceMapOutputFilename, - sourceMapBasepath: this.options.sourceMapBasepath, - sourceMapRootpath: this.options.sourceMapRootpath, - outputSourceFiles: this.options.outputSourceFiles, - sourceMapGenerator: this.options.sourceMapGenerator, - sourceMapFileInline: this.options.sourceMapFileInline - }); + var Variable = + /*#__PURE__*/ + function (_Node) { + _inherits(Variable, _Node); - var css = sourceMapOutput.toCSS(options); - this.sourceMap = sourceMapOutput.sourceMap; - this.sourceMapURL = sourceMapOutput.sourceMapURL; - if (this.options.sourceMapInputFilename) { - this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename); - } - if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) { - this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL); - } - return css + this.getCSSAppendage(); - }; + function Variable(name, index, currentFileInfo) { + var _this; - SourceMapBuilder.prototype.getCSSAppendage = function() { + _classCallCheck(this, Variable); - var sourceMapURL = this.sourceMapURL; - if (this.options.sourceMapFileInline) { - if (this.sourceMap === undefined) { - return ''; - } - sourceMapURL = 'data:application/json;base64,' + environment.encodeBase64(this.sourceMap); - } + _this.name = name; + _this._index = index; + _this._fileInfo = currentFileInfo; + return _possibleConstructorReturn(_this); + } - if (sourceMapURL) { - return '/*# sourceMappingURL=' + sourceMapURL + ' */'; + _createClass(Variable, [{ + key: "eval", + value: function _eval(context) { + var variable; + var name = this.name; + + if (name.indexOf('@@') === 0) { + name = "@".concat(new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value); } - return ''; - }; - SourceMapBuilder.prototype.getExternalSourceMap = function() { - return this.sourceMap; - }; - SourceMapBuilder.prototype.setExternalSourceMap = function(sourceMap) { - this.sourceMap = sourceMap; - }; + if (this.evaluating) { + throw { + type: 'Name', + message: "Recursive variable definition for ".concat(name), + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } - SourceMapBuilder.prototype.isInline = function() { - return this.options.sourceMapFileInline; - }; - SourceMapBuilder.prototype.getSourceMapURL = function() { - return this.sourceMapURL; - }; - SourceMapBuilder.prototype.getOutputFilename = function() { - return this.options.sourceMapOutputFilename; - }; - SourceMapBuilder.prototype.getInputFilename = function() { - return this.sourceMapInputFilename; - }; + this.evaluating = true; + variable = this.find(context.frames, function (frame) { + var v = frame.variable(name); - return SourceMapBuilder; -}; + if (v) { + if (v.important) { + var importantScope = context.importantScope[context.importantScope.length - 1]; + importantScope.important = v.important; + } // If in calc, wrap vars in a function call to cascade evaluate args first -},{}],48:[function(require,module,exports){ -module.exports = function (environment) { - var SourceMapOutput = function (options) { - this._css = []; - this._rootNode = options.rootNode; - this._contentsMap = options.contentsMap; - this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap; - if (options.sourceMapFilename) { - this._sourceMapFilename = options.sourceMapFilename.replace(/\\/g, '/'); - } - this._outputFilename = options.outputFilename; - this.sourceMapURL = options.sourceMapURL; - if (options.sourceMapBasepath) { - this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\/g, '/'); - } - if (options.sourceMapRootpath) { - this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\/g, '/'); - if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') { - this._sourceMapRootpath += '/'; + if (context.inCalc) { + return new Call('_SELF', [v.value]).eval(context); + } else { + return v.value.eval(context); } + } + }); + + if (variable) { + this.evaluating = false; + return variable; } else { - this._sourceMapRootpath = ''; + throw { + type: 'Name', + message: "variable ".concat(name, " is undefined"), + filename: this.fileInfo().filename, + index: this.getIndex() + }; } - this._outputSourceFiles = options.outputSourceFiles; - this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator(); - - this._lineNumber = 0; - this._column = 0; - }; + } + }, { + key: "find", + value: function find(obj, fun) { + for (var i = 0, r; i < obj.length; i++) { + r = fun.call(obj, obj[i]); - SourceMapOutput.prototype.removeBasepath = function(path) { - if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) { - path = path.substring(this._sourceMapBasepath.length); - if (path.charAt(0) === '\\' || path.charAt(0) === '/') { - path = path.substring(1); - } + if (r) { + return r; + } } - return path; - }; + return null; + } + }]); - SourceMapOutput.prototype.normalizeFilename = function(filename) { - filename = filename.replace(/\\/g, '/'); - filename = this.removeBasepath(filename); - return (this._sourceMapRootpath || '') + filename; - }; + return Variable; + }(Node); - SourceMapOutput.prototype.add = function(chunk, fileInfo, index, mapLines) { + Variable.prototype.type = 'Variable'; - // ignore adding empty strings - if (!chunk) { - return; - } + var Property = + /*#__PURE__*/ + function (_Node) { + _inherits(Property, _Node); - var lines, - sourceLines, - columns, - sourceColumns, - i; + function Property(name, index, currentFileInfo) { + var _this; - if (fileInfo && fileInfo.filename) { - var inputSource = this._contentsMap[fileInfo.filename]; + _classCallCheck(this, Property); - // remove vars/banner added to the top of the file - if (this._contentsIgnoredCharsMap[fileInfo.filename]) { - // adjust the index - index -= this._contentsIgnoredCharsMap[fileInfo.filename]; - if (index < 0) { index = 0; } - // adjust the source - inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]); - } - inputSource = inputSource.substring(0, index); - sourceLines = inputSource.split('\n'); - sourceColumns = sourceLines[sourceLines.length - 1]; - } + _this.name = name; + _this._index = index; + _this._fileInfo = currentFileInfo; + return _possibleConstructorReturn(_this); + } - lines = chunk.split('\n'); - columns = lines[lines.length - 1]; + _createClass(Property, [{ + key: "eval", + value: function _eval(context) { + var property; + var name = this.name; // TODO: shorten this reference - if (fileInfo && fileInfo.filename) { - if (!mapLines) { - this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column}, - original: { line: sourceLines.length, column: sourceColumns.length}, - source: this.normalizeFilename(fileInfo.filename)}); - } else { - for (i = 0; i < lines.length; i++) { - this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0}, - original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0}, - source: this.normalizeFilename(fileInfo.filename)}); - } - } - } + var mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules; - if (lines.length === 1) { - this._column += columns.length; - } else { - this._lineNumber += lines.length - 1; - this._column = columns.length; + if (this.evaluating) { + throw { + type: 'Name', + message: "Recursive property reference for ".concat(name), + filename: this.fileInfo().filename, + index: this.getIndex() + }; } - this._css.push(chunk); - }; + this.evaluating = true; + property = this.find(context.frames, function (frame) { + var v; + var vArr = frame.property(name); - SourceMapOutput.prototype.isEmpty = function() { - return this._css.length === 0; - }; + if (vArr) { + for (var i = 0; i < vArr.length; i++) { + v = vArr[i]; + vArr[i] = new Declaration(v.name, v.value, v.important, v.merge, v.index, v.currentFileInfo, v.inline, v.variable); + } - SourceMapOutput.prototype.toCSS = function(context) { - this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null }); + mergeRules(vArr); + v = vArr[vArr.length - 1]; - if (this._outputSourceFiles) { - for (var filename in this._contentsMap) { - if (this._contentsMap.hasOwnProperty(filename)) { - var source = this._contentsMap[filename]; - if (this._contentsIgnoredCharsMap[filename]) { - source = source.slice(this._contentsIgnoredCharsMap[filename]); - } - this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source); - } + if (v.important) { + var importantScope = context.importantScope[context.importantScope.length - 1]; + importantScope.important = v.important; } + + v = v.value.eval(context); + return v; + } + }); + + if (property) { + this.evaluating = false; + return property; + } else { + throw { + type: 'Name', + message: "Property '".concat(name, "' is undefined"), + filename: this.currentFileInfo.filename, + index: this.index + }; } + } + }, { + key: "find", + value: function find(obj, fun) { + for (var i = 0, r; i < obj.length; i++) { + r = fun.call(obj, obj[i]); - this._rootNode.genCSS(context, this); + if (r) { + return r; + } + } - if (this._css.length > 0) { - var sourceMapURL, - sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON()); + return null; + } + }]); - if (this.sourceMapURL) { - sourceMapURL = this.sourceMapURL; - } else if (this._sourceMapFilename) { - sourceMapURL = this._sourceMapFilename; - } - this.sourceMapURL = sourceMapURL; + return Property; + }(Node); - this.sourceMap = sourceMapContent; - } + Property.prototype.type = 'Property'; - return this._css.join(''); - }; + var Attribute = + /*#__PURE__*/ + function (_Node) { + _inherits(Attribute, _Node); - return SourceMapOutput; -}; + function Attribute(key, op, value) { + var _this; -},{}],49:[function(require,module,exports){ -var contexts = require('./contexts'), - visitor = require('./visitors'), - tree = require('./tree'); + _classCallCheck(this, Attribute); -module.exports = function(root, options) { - options = options || {}; - var evaldRoot, - variables = options.variables, - evalEnv = new contexts.Eval(options); + _this.key = key; + _this.op = op; + _this.value = value; + return _possibleConstructorReturn(_this); + } - // - // Allows setting variables with a hash, so: - // - // `{ color: new tree.Color('#f01') }` will become: - // - // new tree.Declaration('@color', - // new tree.Value([ - // new tree.Expression([ - // new tree.Color('#f01') - // ]) - // ]) - // ) - // - if (typeof variables === 'object' && !Array.isArray(variables)) { - variables = Object.keys(variables).map(function (k) { - var value = variables[k]; + _createClass(Attribute, [{ + key: "eval", + value: function _eval(context) { + return new Attribute(this.key.eval ? this.key.eval(context) : this.key, this.op, this.value && this.value.eval ? this.value.eval(context) : this.value); + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + output.add(this.toCSS(context)); + } + }, { + key: "toCSS", + value: function toCSS(context) { + var value = this.key.toCSS ? this.key.toCSS(context) : this.key; - if (!(value instanceof tree.Value)) { - if (!(value instanceof tree.Expression)) { - value = new tree.Expression([value]); - } - value = new tree.Value([value]); - } - return new tree.Declaration('@' + k, value, false, null, 0); - }); - evalEnv.frames = [new tree.Ruleset(null, variables)]; - } + if (this.op) { + value += this.op; + value += this.value.toCSS ? this.value.toCSS(context) : this.value; + } - var visitors = [ - new visitor.JoinSelectorVisitor(), - new visitor.MarkVisibleSelectorsVisitor(true), - new visitor.ExtendVisitor(), - new visitor.ToCSSVisitor({compress: Boolean(options.compress)}) - ], preEvalVisitors = [], v, visitorIterator; + return "[".concat(value, "]"); + } + }]); - /** - * first() / get() allows visitors to be added while visiting - * - * @todo Add scoping for visitors just like functions for @plugin; right now they're global - */ - if (options.pluginManager) { - visitorIterator = options.pluginManager.visitor(); - for (var i = 0; i < 2; i++) { - visitorIterator.first(); - while ((v = visitorIterator.get())) { - if (v.isPreEvalVisitor) { - if (i === 0 || preEvalVisitors.indexOf(v) === -1) { - preEvalVisitors.push(v); - v.run(root); - } - } - else { - if (i === 0 || visitors.indexOf(v) === -1) { - if (v.isPreVisitor) { - visitors.unshift(v); - } - else { - visitors.push(v); - } - } - } - } - } - } - - evaldRoot = root.eval(evalEnv); + return Attribute; + }(Node); + + Attribute.prototype.type = 'Attribute'; - for (var i = 0; i < visitors.length; i++) { - visitors[i].run(evaldRoot); + var Quoted = + /*#__PURE__*/ + function (_Node) { + _inherits(Quoted, _Node); + + function Quoted(str, content, escaped, index, currentFileInfo) { + var _this; + + _classCallCheck(this, Quoted); + + _this.escaped = escaped == null ? true : escaped; + _this.value = content || ''; + _this.quote = str.charAt(0); + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.variableRegex = /@\{([\w-]+)\}/g; + _this.propRegex = /\$\{([\w-]+)\}/g; + return _possibleConstructorReturn(_this); } - // Run any remaining visitors added after eval pass - if (options.pluginManager) { - visitorIterator.first(); - while ((v = visitorIterator.get())) { - if (visitors.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) { - v.run(evaldRoot); - } + _createClass(Quoted, [{ + key: "genCSS", + value: function genCSS(context, output) { + if (!this.escaped) { + output.add(this.quote, this.fileInfo(), this.getIndex()); } - } - return evaldRoot; -}; - -},{"./contexts":13,"./tree":67,"./visitors":93}],50:[function(require,module,exports){ -var Node = require('./node'); - -var Anonymous = function (value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) { - this.value = value; - this._index = index; - this._fileInfo = currentFileInfo; - this.mapLines = mapLines; - this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike; - this.allowRoot = true; - this.copyVisibilityInfo(visibilityInfo); -}; -Anonymous.prototype = new Node(); -Anonymous.prototype.type = 'Anonymous'; -Anonymous.prototype.eval = function () { - return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo()); -}; -Anonymous.prototype.compare = function (other) { - return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; -}; -Anonymous.prototype.isRulesetLike = function() { - return this.rulesetLike; -}; -Anonymous.prototype.genCSS = function (context, output) { - this.nodeVisible = Boolean(this.value); - if (this.nodeVisible) { - output.add(this.value, this._fileInfo, this._index, this.mapLines); - } -}; -module.exports = Anonymous; - -},{"./node":76}],51:[function(require,module,exports){ -var Node = require('./node'); - -var Assignment = function (key, val) { - this.key = key; - this.value = val; -}; - -Assignment.prototype = new Node(); -Assignment.prototype.type = 'Assignment'; -Assignment.prototype.accept = function (visitor) { - this.value = visitor.visit(this.value); -}; -Assignment.prototype.eval = function (context) { - if (this.value.eval) { - return new Assignment(this.key, this.value.eval(context)); - } - return this; -}; -Assignment.prototype.genCSS = function (context, output) { - output.add(this.key + '='); - if (this.value.genCSS) { - this.value.genCSS(context, output); - } else { output.add(this.value); - } -}; -module.exports = Assignment; -},{"./node":76}],52:[function(require,module,exports){ -var Node = require('./node'), - Selector = require('./selector'), - Ruleset = require('./ruleset'), - Anonymous = require('./anonymous'); + if (!this.escaped) { + output.add(this.quote); + } + } + }, { + key: "containsVariables", + value: function containsVariables() { + return this.value.match(this.variableRegex); + } + }, { + key: "eval", + value: function _eval(context) { + var that = this; + var value = this.value; + + var variableReplacement = function variableReplacement(_, name) { + var v = new Variable("@".concat(name), that.getIndex(), that.fileInfo()).eval(context, true); + return v instanceof Quoted ? v.value : v.toCSS(); + }; -var AtRule = function (name, value, rules, index, currentFileInfo, debugInfo, isRooted, visibilityInfo) { - var i; + var propertyReplacement = function propertyReplacement(_, name) { + var v = new Property("$".concat(name), that.getIndex(), that.fileInfo()).eval(context, true); + return v instanceof Quoted ? v.value : v.toCSS(); + }; - this.name = name; - this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value); - if (rules) { - if (Array.isArray(rules)) { - this.rules = rules; - } else { - this.rules = [rules]; - this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors(); - } - for (i = 0; i < this.rules.length; i++) { - this.rules[i].allowImports = true; - } - this.setParent(this.rules, this); - } - this._index = index; - this._fileInfo = currentFileInfo; - this.debugInfo = debugInfo; - this.isRooted = isRooted || false; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; -}; - -AtRule.prototype = new Node(); -AtRule.prototype.type = 'AtRule'; -AtRule.prototype.accept = function (visitor) { - var value = this.value, rules = this.rules; - if (rules) { - this.rules = visitor.visitArray(rules); - } - if (value) { - this.value = visitor.visit(value); - } -}; -AtRule.prototype.isRulesetLike = function() { - return this.rules || !this.isCharset(); -}; -AtRule.prototype.isCharset = function() { - return '@charset' === this.name; -}; -AtRule.prototype.genCSS = function (context, output) { - var value = this.value, rules = this.rules; - output.add(this.name, this.fileInfo(), this.getIndex()); - if (value) { - output.add(' '); - value.genCSS(context, output); - } - if (rules) { - this.outputRuleset(context, output, rules); - } else { - output.add(';'); - } -}; -AtRule.prototype.eval = function (context) { - var mediaPathBackup, mediaBlocksBackup, value = this.value, rules = this.rules; - - // media stored inside other atrule should not bubble over it - // backpup media bubbling information - mediaPathBackup = context.mediaPath; - mediaBlocksBackup = context.mediaBlocks; - // deleted media bubbling information - context.mediaPath = []; - context.mediaBlocks = []; - - if (value) { - value = value.eval(context); - } - if (rules) { - // assuming that there is only one rule at this point - that is how parser constructs the rule - rules = [rules[0].eval(context)]; - rules[0].root = true; - } - // restore media bubbling information - context.mediaPath = mediaPathBackup; - context.mediaBlocks = mediaBlocksBackup; - - return new AtRule(this.name, value, rules, - this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo()); -}; -AtRule.prototype.variable = function (name) { - if (this.rules) { - // assuming that there is only one rule at this point - that is how parser constructs the rule - return Ruleset.prototype.variable.call(this.rules[0], name); - } -}; -AtRule.prototype.find = function () { - if (this.rules) { - // assuming that there is only one rule at this point - that is how parser constructs the rule - return Ruleset.prototype.find.apply(this.rules[0], arguments); - } -}; -AtRule.prototype.rulesets = function () { - if (this.rules) { - // assuming that there is only one rule at this point - that is how parser constructs the rule - return Ruleset.prototype.rulesets.apply(this.rules[0]); - } -}; -AtRule.prototype.outputRuleset = function (context, output, rules) { - var ruleCnt = rules.length, i; - context.tabLevel = (context.tabLevel | 0) + 1; - - // Compressed - if (context.compress) { - output.add('{'); - for (i = 0; i < ruleCnt; i++) { - rules[i].genCSS(context, output); - } - output.add('}'); - context.tabLevel--; - return; - } + function iterativeReplace(value, regexp, replacementFnc) { + var evaluatedValue = value; - // Non-compressed - var tabSetStr = '\n' + Array(context.tabLevel).join(' '), tabRuleStr = tabSetStr + ' '; - if (!ruleCnt) { - output.add(' {' + tabSetStr + '}'); - } else { - output.add(' {' + tabRuleStr); - rules[0].genCSS(context, output); - for (i = 1; i < ruleCnt; i++) { - output.add(tabRuleStr); - rules[i].genCSS(context, output); - } - output.add(tabSetStr + '}'); - } - - context.tabLevel--; -}; -module.exports = AtRule; - -},{"./anonymous":50,"./node":76,"./ruleset":81,"./selector":82}],53:[function(require,module,exports){ -var Node = require('./node'); - -var Attribute = function (key, op, value) { - this.key = key; - this.op = op; - this.value = value; -}; -Attribute.prototype = new Node(); -Attribute.prototype.type = 'Attribute'; -Attribute.prototype.eval = function (context) { - return new Attribute(this.key.eval ? this.key.eval(context) : this.key, - this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value); -}; -Attribute.prototype.genCSS = function (context, output) { - output.add(this.toCSS(context)); -}; -Attribute.prototype.toCSS = function (context) { - var value = this.key.toCSS ? this.key.toCSS(context) : this.key; - - if (this.op) { - value += this.op; - value += (this.value.toCSS ? this.value.toCSS(context) : this.value); - } - - return '[' + value + ']'; -}; -module.exports = Attribute; - -},{"./node":76}],54:[function(require,module,exports){ -var Node = require('./node'), - Anonymous = require('./anonymous'), - FunctionCaller = require('../functions/function-caller'); -// -// A function call node. -// -var Call = function (name, args, index, currentFileInfo) { - this.name = name; - this.args = args; - this.calc = name === 'calc'; - this._index = index; - this._fileInfo = currentFileInfo; -}; -Call.prototype = new Node(); -Call.prototype.type = 'Call'; -Call.prototype.accept = function (visitor) { - if (this.args) { - this.args = visitor.visitArray(this.args); - } -}; -// -// When evaluating a function call, -// we either find the function in the functionRegistry, -// in which case we call it, passing the evaluated arguments, -// if this returns null or we cannot find the function, we -// simply print it out as it appeared originally [2]. -// -// The reason why we evaluate the arguments, is in the case where -// we try to pass a variable to a function, like: `saturate(@color)`. -// The function should receive the value, not the variable. -// -Call.prototype.eval = function (context) { - /** - * Turn off math for calc(), and switch back on for evaluating nested functions - */ - var currentMathContext = context.mathOn; - context.mathOn = !this.calc; - if (this.calc || context.inCalc) { - context.enterCalc(); - } - var args = this.args.map(function (a) { return a.eval(context); }); - if (this.calc || context.inCalc) { - context.exitCalc(); - } - context.mathOn = currentMathContext; + do { + value = evaluatedValue.toString(); + evaluatedValue = value.replace(regexp, replacementFnc); + } while (value !== evaluatedValue); - var result, funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo()); - - if (funcCaller.isValid()) { - try { - result = funcCaller.call(args); - } catch (e) { - throw { - type: e.type || 'Runtime', - message: 'error evaluating function `' + this.name + '`' + - (e.message ? ': ' + e.message : ''), - index: this.getIndex(), - filename: this.fileInfo().filename, - line: e.lineNumber, - column: e.columnNumber - }; + return evaluatedValue; } - if (result !== null && result !== undefined) { - // Results that that are not nodes are cast as Anonymous nodes - // Falsy values or booleans are returned as empty nodes - if (!(result instanceof Node)) { - if (!result || result === true) { - result = new Anonymous(null); - } - else { - result = new Anonymous(result.toString()); - } - - } - result._index = this._index; - result._fileInfo = this._fileInfo; - return result; + value = iterativeReplace(value, this.variableRegex, variableReplacement); + value = iterativeReplace(value, this.propRegex, propertyReplacement); + return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo()); + } + }, { + key: "compare", + value: function compare(other) { + // when comparing quoted strings allow the quote to differ + if (other.type === 'Quoted' && !this.escaped && !other.escaped) { + return Node.numericCompare(this.value, other.value); + } else { + return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; } + } + }]); - } + return Quoted; + }(Node); - return new Call(this.name, args, this.getIndex(), this.fileInfo()); -}; -Call.prototype.genCSS = function (context, output) { - output.add(this.name + '(', this.fileInfo(), this.getIndex()); + Quoted.prototype.type = 'Quoted'; - for (var i = 0; i < this.args.length; i++) { - this.args[i].genCSS(context, output); - if (i + 1 < this.args.length) { - output.add(', '); - } - } + var URL = + /*#__PURE__*/ + function (_Node) { + _inherits(URL, _Node); - output.add(')'); -}; -module.exports = Call; + function URL(val, index, currentFileInfo, isEvald) { + var _this; -},{"../functions/function-caller":26,"./anonymous":50,"./node":76}],55:[function(require,module,exports){ -var Node = require('./node'), - colors = require('../data/colors'); + _classCallCheck(this, URL); -// -// RGB Colors - #ff0014, #eee -// -var Color = function (rgb, a, originalForm) { - var self = this; - // - // The end goal here, is to parse the arguments - // into an integer triplet, such as `128, 255, 0` - // - // This facilitates operations and conversions. - // - if (Array.isArray(rgb)) { - this.rgb = rgb; - } else if (rgb.length >= 6) { - this.rgb = []; - rgb.match(/.{2}/g).map(function (c, i) { - if (i < 3) { - self.rgb.push(parseInt(c, 16)); - } else { - self.alpha = (parseInt(c, 16)) / 255; - } - }); - } else { - this.rgb = []; - rgb.split('').map(function (c, i) { - if (i < 3) { - self.rgb.push(parseInt(c + c, 16)); - } else { - self.alpha = (parseInt(c + c, 16)) / 255; - } - }); + _this.value = val; + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.isEvald = isEvald; + return _possibleConstructorReturn(_this); } - this.alpha = this.alpha || (typeof a === 'number' ? a : 1); - if (typeof originalForm !== 'undefined') { - this.value = originalForm; - } -}; -Color.prototype = new Node(); -Color.prototype.type = 'Color'; + _createClass(URL, [{ + key: "accept", + value: function accept(visitor) { + this.value = visitor.visit(this.value); + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + output.add('url('); + this.value.genCSS(context, output); + output.add(')'); + } + }, { + key: "eval", + value: function _eval(context) { + var val = this.value.eval(context); + var rootpath; -function clamp(v, max) { - return Math.min(Math.max(v, 0), max); -} - -function toHex(v) { - return '#' + v.map(function (c) { - c = clamp(Math.round(c), 255); - return (c < 16 ? '0' : '') + c.toString(16); - }).join(''); -} - -Color.prototype.luma = function () { - var r = this.rgb[0] / 255, - g = this.rgb[1] / 255, - b = this.rgb[2] / 255; - - r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4); - g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4); - b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4); - - return 0.2126 * r + 0.7152 * g + 0.0722 * b; -}; -Color.prototype.genCSS = function (context, output) { - output.add(this.toCSS(context)); -}; -Color.prototype.toCSS = function (context, doNotCompress) { - var compress = context && context.compress && !doNotCompress, color, alpha, - colorFunction, args = []; - - // `value` is set if this color was originally - // converted from a named color string so we need - // to respect this and try to output named color too. - alpha = this.fround(context, this.alpha); - - if (this.value) { - if (this.value.indexOf('rgb') === 0) { - if (alpha < 1) { - colorFunction = 'rgba'; - } - } else if (this.value.indexOf('hsl') === 0) { - if (alpha < 1) { - colorFunction = 'hsla'; - } else { - colorFunction = 'hsl'; - } - } else { - return this.value; - } - } else { - if (alpha < 1) { - colorFunction = 'rgba'; - } - } + if (!this.isEvald) { + // Add the rootpath if the URL requires a rewrite + rootpath = this.fileInfo() && this.fileInfo().rootpath; - switch (colorFunction) { - case 'rgba': - args = this.rgb.map(function (c) { - return clamp(Math.round(c), 255); - }).concat(clamp(alpha, 1)); - break; - case 'hsla': - args.push(clamp(alpha, 1)); - case 'hsl': - color = this.toHSL(); - args = [ - this.fround(context, color.h), - this.fround(context, color.s * 100) + '%', - this.fround(context, color.l * 100) + '%' - ].concat(args); - } + if (typeof rootpath === 'string' && typeof val.value === 'string' && context.pathRequiresRewrite(val.value)) { + if (!val.quote) { + rootpath = escapePath(rootpath); + } - if (colorFunction) { - // Values are capped between `0` and `255`, rounded and zero-padded. - return colorFunction + '(' + args.join(',' + (compress ? '' : ' ')) + ')'; - } + val.value = context.rewritePath(val.value, rootpath); + } else { + val.value = context.normalizePath(val.value); + } // Add url args if enabled - color = this.toRGB(); - if (compress) { - var splitcolor = color.split(''); + if (context.urlArgs) { + if (!val.value.match(/^\s*data:/)) { + var delimiter = val.value.indexOf('?') === -1 ? '?' : '&'; + var urlArgs = delimiter + context.urlArgs; - // Convert color to short format - if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) { - color = '#' + splitcolor[1] + splitcolor[3] + splitcolor[5]; + if (val.value.indexOf('#') !== -1) { + val.value = val.value.replace('#', "".concat(urlArgs, "#")); + } else { + val.value += urlArgs; + } + } + } } - } - return color; -}; + return new URL(val, this.getIndex(), this.fileInfo(), true); + } + }]); -// -// Operations have to be done per-channel, if not, -// channels will spill onto each other. Once we have -// our result, in the form of an integer triplet, -// we create a new Color node to hold the result. -// -Color.prototype.operate = function (context, op, other) { - var rgb = new Array(3); - var alpha = this.alpha * (1 - other.alpha) + other.alpha; - for (var c = 0; c < 3; c++) { - rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]); - } - return new Color(rgb, alpha); -}; -Color.prototype.toRGB = function () { - return toHex(this.rgb); -}; -Color.prototype.toHSL = function () { - var r = this.rgb[0] / 255, - g = this.rgb[1] / 255, - b = this.rgb[2] / 255, - a = this.alpha; + return URL; + }(Node); - var max = Math.max(r, g, b), min = Math.min(r, g, b); - var h, s, l = (max + min) / 2, d = max - min; + URL.prototype.type = 'Url'; - if (max === min) { - h = s = 0; - } else { - s = l > 0.5 ? d / (2 - max - min) : d / (max + min); - - switch (max) { - case r: h = (g - b) / d + (g < b ? 6 : 0); break; - case g: h = (b - r) / d + 2; break; - case b: h = (r - g) / d + 4; break; - } - h /= 6; - } - return { h: h * 360, s: s, l: l, a: a }; -}; -// Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript -Color.prototype.toHSV = function () { - var r = this.rgb[0] / 255, - g = this.rgb[1] / 255, - b = this.rgb[2] / 255, - a = this.alpha; - - var max = Math.max(r, g, b), min = Math.min(r, g, b); - var h, s, v = max; - - var d = max - min; - if (max === 0) { - s = 0; - } else { - s = d / max; - } + function escapePath(path) { + return path.replace(/[\(\)'"\s]/g, function (match) { + return "\\".concat(match); + }); + } - if (max === min) { - h = 0; - } else { - switch (max) { - case r: h = (g - b) / d + (g < b ? 6 : 0); break; - case g: h = (b - r) / d + 2; break; - case b: h = (r - g) / d + 4; break; - } - h /= 6; - } - return { h: h * 360, s: s, v: v, a: a }; -}; -Color.prototype.toARGB = function () { - return toHex([this.alpha * 255].concat(this.rgb)); -}; -Color.prototype.compare = function (x) { - return (x.rgb && - x.rgb[0] === this.rgb[0] && - x.rgb[1] === this.rgb[1] && - x.rgb[2] === this.rgb[2] && - x.alpha === this.alpha) ? 0 : undefined; -}; - -Color.fromKeyword = function(keyword) { - var c, key = keyword.toLowerCase(); - if (colors.hasOwnProperty(key)) { - c = new Color(colors[key].slice(1)); - } - else if (key === 'transparent') { - c = new Color([0, 0, 0], 0); - } + var Media = + /*#__PURE__*/ + function (_AtRule) { + _inherits(Media, _AtRule); - if (c) { - c.value = keyword; - return c; - } -}; -module.exports = Color; + function Media(value, features, index, currentFileInfo, visibilityInfo) { + var _this; -},{"../data/colors":14,"./node":76}],56:[function(require,module,exports){ -var Node = require('./node'); + _classCallCheck(this, Media); -var Combinator = function (value) { - if (value === ' ') { - this.value = ' '; - this.emptyOrWhitespace = true; - } else { - this.value = value ? value.trim() : ''; - this.emptyOrWhitespace = this.value === ''; - } -}; -Combinator.prototype = new Node(); -Combinator.prototype.type = 'Combinator'; -var _noSpaceCombinators = { - '': true, - ' ': true, - '|': true -}; -Combinator.prototype.genCSS = function (context, output) { - var spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' '; - output.add(spaceOrEmpty + this.value + spaceOrEmpty); -}; -module.exports = Combinator; - -},{"./node":76}],57:[function(require,module,exports){ -var Node = require('./node'), - getDebugInfo = require('./debug-info'); - -var Comment = function (value, isLineComment, index, currentFileInfo) { - this.value = value; - this.isLineComment = isLineComment; - this._index = index; - this._fileInfo = currentFileInfo; - this.allowRoot = true; -}; -Comment.prototype = new Node(); -Comment.prototype.type = 'Comment'; -Comment.prototype.genCSS = function (context, output) { - if (this.debugInfo) { - output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex()); - } - output.add(this.value); -}; -Comment.prototype.isSilent = function(context) { - var isCompressed = context.compress && this.value[2] !== '!'; - return this.isLineComment || isCompressed; -}; -module.exports = Comment; - -},{"./debug-info":59,"./node":76}],58:[function(require,module,exports){ -var Node = require('./node'); - -var Condition = function (op, l, r, i, negate) { - this.op = op.trim(); - this.lvalue = l; - this.rvalue = r; - this._index = i; - this.negate = negate; -}; -Condition.prototype = new Node(); -Condition.prototype.type = 'Condition'; -Condition.prototype.accept = function (visitor) { - this.lvalue = visitor.visit(this.lvalue); - this.rvalue = visitor.visit(this.rvalue); -}; -Condition.prototype.eval = function (context) { - var result = (function (op, a, b) { - switch (op) { - case 'and': return a && b; - case 'or': return a || b; - default: - switch (Node.compare(a, b)) { - case -1: - return op === '<' || op === '=<' || op === '<='; - case 0: - return op === '=' || op === '>=' || op === '=<' || op === '<='; - case 1: - return op === '>' || op === '>='; - default: - return false; - } - } - })(this.op, this.lvalue.eval(context), this.rvalue.eval(context)); + _this._index = index; + _this._fileInfo = currentFileInfo; + var selectors = new Selector([], null, null, _this._index, _this._fileInfo).createEmptySelectors(); + _this.features = new Value(features); + _this.rules = [new Ruleset(selectors, value)]; + _this.rules[0].allowImports = true; - return this.negate ? !result : result; -}; -module.exports = Condition; + _this.copyVisibilityInfo(visibilityInfo); -},{"./node":76}],59:[function(require,module,exports){ -var debugInfo = function(context, ctx, lineSeparator) { - var result = ''; - if (context.dumpLineNumbers && !context.compress) { - switch (context.dumpLineNumbers) { - case 'comments': - result = debugInfo.asComment(ctx); - break; - case 'mediaquery': - result = debugInfo.asMediaQuery(ctx); - break; - case 'all': - result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx); - break; - } - } - return result; -}; + _this.allowRoot = true; -debugInfo.asComment = function(ctx) { - return '/* line ' + ctx.debugInfo.lineNumber + ', ' + ctx.debugInfo.fileName + ' */\n'; -}; + _this.setParent(selectors, _assertThisInitialized(_this)); -debugInfo.asMediaQuery = function(ctx) { - var filenameWithProtocol = ctx.debugInfo.fileName; - if (!/^[a-z]+:\/\//i.test(filenameWithProtocol)) { - filenameWithProtocol = 'file://' + filenameWithProtocol; - } - return '@media -sass-debug-info{filename{font-family:' + - filenameWithProtocol.replace(/([.:\/\\])/g, function (a) { - if (a == '\\') { - a = '\/'; - } - return '\\' + a; - }) + - '}line{font-family:\\00003' + ctx.debugInfo.lineNumber + '}}\n'; -}; - -module.exports = debugInfo; - -},{}],60:[function(require,module,exports){ -var Node = require('./node'), - Value = require('./value'), - Keyword = require('./keyword'), - Anonymous = require('./anonymous'), - MATH = require('../constants').Math; - -var Declaration = function (name, value, important, merge, index, currentFileInfo, inline, variable) { - this.name = name; - this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]); - this.important = important ? ' ' + important.trim() : ''; - this.merge = merge; - this._index = index; - this._fileInfo = currentFileInfo; - this.inline = inline || false; - this.variable = (variable !== undefined) ? variable - : (name.charAt && (name.charAt(0) === '@')); - this.allowRoot = true; - this.setParent(this.value, this); -}; - -function evalName(context, name) { - var value = '', i, n = name.length, - output = {add: function (s) {value += s;}}; - for (i = 0; i < n; i++) { - name[i].eval(context).genCSS(context, output); - } - return value; -} + _this.setParent(_this.features, _assertThisInitialized(_this)); -Declaration.prototype = new Node(); -Declaration.prototype.type = 'Declaration'; -Declaration.prototype.genCSS = function (context, output) { - output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex()); - try { - this.value.genCSS(context, output); - } - catch (e) { - e.index = this._index; - e.filename = this._fileInfo.filename; - throw e; - } - output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index); -}; -Declaration.prototype.eval = function (context) { - var mathBypass = false, prevMath, name = this.name, evaldValue, variable = this.variable; - if (typeof name !== 'string') { - // expand 'primitive' name directly to get - // things faster (~10% for benchmark.less): - name = (name.length === 1) && (name[0] instanceof Keyword) ? - name[0].value : evalName(context, name); - variable = false; // never treat expanded interpolation as new variable name - } + _this.setParent(_this.rules, _assertThisInitialized(_this)); - // @todo remove when parens-division is default - if (name === 'font' && context.math === MATH.ALWAYS) { - mathBypass = true; - prevMath = context.math; - context.math = MATH.PARENS_DIVISION; + return _possibleConstructorReturn(_this); } - try { - context.importantScope.push({}); - evaldValue = this.value.eval(context); - if (!this.variable && evaldValue.type === 'DetachedRuleset') { - throw { message: 'Rulesets cannot be evaluated on a property.', - index: this.getIndex(), filename: this.fileInfo().filename }; - } - var important = this.important, - importantResult = context.importantScope.pop(); - if (!important && importantResult.important) { - important = importantResult.important; + _createClass(Media, [{ + key: "isRulesetLike", + value: function isRulesetLike() { + return true; + } + }, { + key: "accept", + value: function accept(visitor) { + if (this.features) { + this.features = visitor.visit(this.features); } - return new Declaration(name, - evaldValue, - important, - this.merge, - this.getIndex(), this.fileInfo(), this.inline, - variable); - } - catch (e) { - if (typeof e.index !== 'number') { - e.index = this.getIndex(); - e.filename = this.fileInfo().filename; - } - throw e; - } - finally { - if (mathBypass) { - context.math = prevMath; - } - } -}; -Declaration.prototype.makeImportant = function () { - return new Declaration(this.name, - this.value, - '!important', - this.merge, - this.getIndex(), this.fileInfo(), this.inline); -}; - -module.exports = Declaration; -},{"../constants":12,"./anonymous":50,"./keyword":70,"./node":76,"./value":86}],61:[function(require,module,exports){ -var Node = require('./node'), - contexts = require('../contexts'), - utils = require('../utils'); - -var DetachedRuleset = function (ruleset, frames) { - this.ruleset = ruleset; - this.frames = frames; - this.setParent(this.ruleset, this); -}; -DetachedRuleset.prototype = new Node(); -DetachedRuleset.prototype.type = 'DetachedRuleset'; -DetachedRuleset.prototype.evalFirst = true; -DetachedRuleset.prototype.accept = function (visitor) { - this.ruleset = visitor.visit(this.ruleset); -}; -DetachedRuleset.prototype.eval = function (context) { - var frames = this.frames || utils.copyArray(context.frames); - return new DetachedRuleset(this.ruleset, frames); -}; -DetachedRuleset.prototype.callEval = function (context) { - return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context); -}; -module.exports = DetachedRuleset; - -},{"../contexts":13,"../utils":89,"./node":76}],62:[function(require,module,exports){ -var Node = require('./node'), - unitConversions = require('../data/unit-conversions'), - Unit = require('./unit'), - Color = require('./color'); - -// -// A number with a unit -// -var Dimension = function (value, unit) { - this.value = parseFloat(value); - if (isNaN(this.value)) { - throw new Error('Dimension is not a number.'); - } - this.unit = (unit && unit instanceof Unit) ? unit : - new Unit(unit ? [unit] : undefined); - this.setParent(this.unit, this); -}; - -Dimension.prototype = new Node(); -Dimension.prototype.type = 'Dimension'; -Dimension.prototype.accept = function (visitor) { - this.unit = visitor.visit(this.unit); -}; -Dimension.prototype.eval = function (context) { - return this; -}; -Dimension.prototype.toColor = function () { - return new Color([this.value, this.value, this.value]); -}; -Dimension.prototype.genCSS = function (context, output) { - if ((context && context.strictUnits) && !this.unit.isSingular()) { - throw new Error('Multiple units in dimension. Correct the units or use the unit function. Bad unit: ' + this.unit.toString()); - } - - var value = this.fround(context, this.value), - strValue = String(value); - - if (value !== 0 && value < 0.000001 && value > -0.000001) { - // would be output 1e-6 etc. - strValue = value.toFixed(20).replace(/0+$/, ''); - } - - if (context && context.compress) { - // Zero values doesn't need a unit - if (value === 0 && this.unit.isLength()) { - output.add(strValue); - return; + if (this.rules) { + this.rules = visitor.visitArray(this.rules); } + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + output.add('@media ', this._fileInfo, this._index); + this.features.genCSS(context, output); + this.outputRuleset(context, output, this.rules); + } + }, { + key: "eval", + value: function _eval(context) { + if (!context.mediaBlocks) { + context.mediaBlocks = []; + context.mediaPath = []; + } + + var media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo()); + + if (this.debugInfo) { + this.rules[0].debugInfo = this.debugInfo; + media.debugInfo = this.debugInfo; + } + + media.features = this.features.eval(context); + context.mediaPath.push(media); + context.mediaBlocks.push(media); + this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit(); + context.frames.unshift(this.rules[0]); + media.rules = [this.rules[0].eval(context)]; + context.frames.shift(); + context.mediaPath.pop(); + return context.mediaPath.length === 0 ? media.evalTop(context) : media.evalNested(context); + } + }, { + key: "evalTop", + value: function evalTop(context) { + var result = this; // Render all dependent Media blocks. - // Float values doesn't need a leading zero - if (value > 0 && value < 1) { - strValue = (strValue).substr(1); + if (context.mediaBlocks.length > 1) { + var selectors = new Selector([], null, null, this.getIndex(), this.fileInfo()).createEmptySelectors(); + result = new Ruleset(selectors, context.mediaBlocks); + result.multiMedia = true; + result.copyVisibilityInfo(this.visibilityInfo()); + this.setParent(result, this); } - } - output.add(strValue); - this.unit.genCSS(context, output); -}; + delete context.mediaBlocks; + delete context.mediaPath; + return result; + } + }, { + key: "evalNested", + value: function evalNested(context) { + var i; + var value; + var path = context.mediaPath.concat([this]); // Extract the media-query conditions separated with `,` (OR). + + for (i = 0; i < path.length; i++) { + value = path[i].features instanceof Value ? path[i].features.value : path[i].features; + path[i] = Array.isArray(value) ? value : [value]; + } // Trace all permutations to generate the resulting media-query. + // + // (a, b and c) with nested (d, e) -> + // a and d + // a and e + // b and c and d + // b and c and e -// In an operation between two Dimensions, -// we default to the first Dimension's unit, -// so `1px + 2` will yield `3px`. -Dimension.prototype.operate = function (context, op, other) { - /* jshint noempty:false */ - var value = this._operate(context, op, this.value, other.value), - unit = this.unit.clone(); - if (op === '+' || op === '-') { - if (unit.numerator.length === 0 && unit.denominator.length === 0) { - unit = other.unit.clone(); - if (this.unit.backupUnit) { - unit.backupUnit = this.unit.backupUnit; - } - } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) { - // do nothing + this.features = new Value(this.permute(path).map(function (path) { + path = path.map(function (fragment) { + return fragment.toCSS ? fragment : new Anonymous(fragment); + }); + + for (i = path.length - 1; i > 0; i--) { + path.splice(i, 0, new Anonymous('and')); + } + + return new Expression(path); + })); + this.setParent(this.features, this); // Fake a tree-node that doesn't output anything. + + return new Ruleset([], []); + } + }, { + key: "permute", + value: function permute(arr) { + if (arr.length === 0) { + return []; + } else if (arr.length === 1) { + return arr[0]; } else { - other = other.convertTo(this.unit.usedUnits()); + var result = []; + var rest = this.permute(arr.slice(1)); - if (context.strictUnits && other.unit.toString() !== unit.toString()) { - throw new Error('Incompatible units. Change the units or use the unit function. Bad units: \'' + unit.toString() + - '\' and \'' + other.unit.toString() + '\'.'); + for (var i = 0; i < rest.length; i++) { + for (var j = 0; j < arr[0].length; j++) { + result.push([arr[0][j]].concat(rest[i])); } + } - value = this._operate(context, op, this.value, other.value); + return result; + } + } + }, { + key: "bubbleSelectors", + value: function bubbleSelectors(selectors) { + if (!selectors) { + return; } - } else if (op === '*') { - unit.numerator = unit.numerator.concat(other.unit.numerator).sort(); - unit.denominator = unit.denominator.concat(other.unit.denominator).sort(); - unit.cancel(); - } else if (op === '/') { - unit.numerator = unit.numerator.concat(other.unit.denominator).sort(); - unit.denominator = unit.denominator.concat(other.unit.numerator).sort(); - unit.cancel(); - } - return new Dimension(value, unit); -}; -Dimension.prototype.compare = function (other) { - var a, b; - if (!(other instanceof Dimension)) { - return undefined; - } + this.rules = [new Ruleset(copyArray(selectors), [this.rules[0]])]; + this.setParent(this.rules, this); + } + }]); - if (this.unit.isEmpty() || other.unit.isEmpty()) { - a = this; - b = other; - } else { - a = this.unify(); - b = other.unify(); - if (a.unit.compare(b.unit) !== 0) { - return undefined; - } - } + return Media; + }(AtRule); - return Node.numericCompare(a.value, b.value); -}; -Dimension.prototype.unify = function () { - return this.convertTo({ length: 'px', duration: 's', angle: 'rad' }); -}; -Dimension.prototype.convertTo = function (conversions) { - var value = this.value, unit = this.unit.clone(), - i, groupName, group, targetUnit, derivedConversions = {}, applyUnit; + Media.prototype.type = 'Media'; - if (typeof conversions === 'string') { - for (i in unitConversions) { - if (unitConversions[i].hasOwnProperty(conversions)) { - derivedConversions = {}; - derivedConversions[i] = conversions; - } - } - conversions = derivedConversions; - } - applyUnit = function (atomicUnit, denominator) { - /* jshint loopfunc:true */ - if (group.hasOwnProperty(atomicUnit)) { - if (denominator) { - value = value / (group[atomicUnit] / group[targetUnit]); - } else { - value = value * (group[atomicUnit] / group[targetUnit]); - } + // CSS @import node + // + // The general strategy here is that we don't want to wait + // for the parsing to be completed, before we start importing + // the file. That's because in the context of a browser, + // most of the time will be spent waiting for the server to respond. + // + // On creation, we push the import path to our import queue, though + // `import,push`, we also pass it a callback, which it'll call once + // the file has been fetched, and parsed. + // - return targetUnit; - } + var Import = + /*#__PURE__*/ + function (_Node) { + _inherits(Import, _Node); - return atomicUnit; - }; + function Import(path, features, options, index, currentFileInfo, visibilityInfo) { + var _this; - for (groupName in conversions) { - if (conversions.hasOwnProperty(groupName)) { - targetUnit = conversions[groupName]; - group = unitConversions[groupName]; + _classCallCheck(this, Import); - unit.map(applyUnit); + _this.options = options; + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.path = path; + _this.features = features; + _this.allowRoot = true; + + if (_this.options.less !== undefined || _this.options.inline) ; else { + var pathValue = _this.getPath(); + + if (pathValue && /[#\.\&\?]css([\?;].*)?$/.test(pathValue)) { + _this.css = true; } - } + } - unit.cancel(); + _this.copyVisibilityInfo(visibilityInfo); - return new Dimension(value, unit); -}; -module.exports = Dimension; + _this.setParent(_this.features, _assertThisInitialized(_this)); -},{"../data/unit-conversions":16,"./color":55,"./node":76,"./unit":84}],63:[function(require,module,exports){ -var Node = require('./node'), - Paren = require('./paren'), - Combinator = require('./combinator'); + _this.setParent(_this.path, _assertThisInitialized(_this)); -var Element = function (combinator, value, isVariable, index, currentFileInfo, visibilityInfo) { - this.combinator = combinator instanceof Combinator ? - combinator : new Combinator(combinator); + return _possibleConstructorReturn(_this); + } - if (typeof value === 'string') { - this.value = value.trim(); - } else if (value) { - this.value = value; - } else { - this.value = ''; - } - this.isVariable = isVariable; - this._index = index; - this._fileInfo = currentFileInfo; - this.copyVisibilityInfo(visibilityInfo); - this.setParent(this.combinator, this); -}; -Element.prototype = new Node(); -Element.prototype.type = 'Element'; -Element.prototype.accept = function (visitor) { - var value = this.value; - this.combinator = visitor.visit(this.combinator); - if (typeof value === 'object') { - this.value = visitor.visit(value); - } -}; -Element.prototype.eval = function (context) { - return new Element(this.combinator, - this.value.eval ? this.value.eval(context) : this.value, - this.isVariable, - this.getIndex(), - this.fileInfo(), this.visibilityInfo()); -}; -Element.prototype.clone = function () { - return new Element(this.combinator, - this.value, - this.isVariable, - this.getIndex(), - this.fileInfo(), this.visibilityInfo()); -}; -Element.prototype.genCSS = function (context, output) { - output.add(this.toCSS(context), this.fileInfo(), this.getIndex()); -}; -Element.prototype.toCSS = function (context) { - context = context || {}; - var value = this.value, firstSelector = context.firstSelector; - if (value instanceof Paren) { - // selector in parens should not be affected by outer selector - // flags (breaks only interpolated selectors - see #1973) - context.firstSelector = true; - } - value = value.toCSS ? value.toCSS(context) : value; - context.firstSelector = firstSelector; - if (value === '' && this.combinator.value.charAt(0) === '&') { - return ''; - } else { - return this.combinator.toCSS(context) + value; - } -}; -module.exports = Element; - -},{"./combinator":56,"./node":76,"./paren":78}],64:[function(require,module,exports){ -var Node = require('./node'), - Paren = require('./paren'), - Comment = require('./comment'), - Dimension = require('./dimension'), - MATH = require('../constants').Math; - -var Expression = function (value, noSpacing) { - this.value = value; - this.noSpacing = noSpacing; - if (!value) { - throw new Error('Expression requires an array parameter'); - } -}; -Expression.prototype = new Node(); -Expression.prototype.type = 'Expression'; -Expression.prototype.accept = function (visitor) { - this.value = visitor.visitArray(this.value); -}; -Expression.prototype.eval = function (context) { - var returnValue, - mathOn = context.isMathOn(), - inParenthesis = this.parens && - (context.math !== MATH.STRICT_LEGACY || !this.parensInOp), - doubleParen = false; - if (inParenthesis) { - context.inParenthesis(); - } - if (this.value.length > 1) { - returnValue = new Expression(this.value.map(function (e) { - if (!e.eval) { - return e; - } - return e.eval(context); - }), this.noSpacing); - } else if (this.value.length === 1) { - if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) { - doubleParen = true; - } - returnValue = this.value[0].eval(context); - } else { - returnValue = this; - } - if (inParenthesis) { - context.outOfParenthesis(); - } - if (this.parens && this.parensInOp && !mathOn && !doubleParen - && (!(returnValue instanceof Dimension))) { - returnValue = new Paren(returnValue); - } - return returnValue; -}; -Expression.prototype.genCSS = function (context, output) { - for (var i = 0; i < this.value.length; i++) { - this.value[i].genCSS(context, output); - if (!this.noSpacing && i + 1 < this.value.length) { - output.add(' '); + _createClass(Import, [{ + key: "accept", + value: function accept(visitor) { + if (this.features) { + this.features = visitor.visit(this.features); } - } -}; -Expression.prototype.throwAwayComments = function () { - this.value = this.value.filter(function(v) { - return !(v instanceof Comment); - }); -}; -module.exports = Expression; - -},{"../constants":12,"./comment":57,"./dimension":62,"./node":76,"./paren":78}],65:[function(require,module,exports){ -var Node = require('./node'), - Selector = require('./selector'); - -var Extend = function Extend(selector, option, index, currentFileInfo, visibilityInfo) { - this.selector = selector; - this.option = option; - this.object_id = Extend.next_id++; - this.parent_ids = [this.object_id]; - this._index = index; - this._fileInfo = currentFileInfo; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; - - switch (option) { - case 'all': - this.allowBefore = true; - this.allowAfter = true; - break; - default: - this.allowBefore = false; - this.allowAfter = false; - break; - } - this.setParent(this.selector, this); -}; -Extend.next_id = 0; - -Extend.prototype = new Node(); -Extend.prototype.type = 'Extend'; -Extend.prototype.accept = function (visitor) { - this.selector = visitor.visit(this.selector); -}; -Extend.prototype.eval = function (context) { - return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); -}; -Extend.prototype.clone = function (context) { - return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); -}; -// it concatenates (joins) all selectors in selector array -Extend.prototype.findSelfSelectors = function (selectors) { - var selfElements = [], - i, - selectorElements; - - for (i = 0; i < selectors.length; i++) { - selectorElements = selectors[i].elements; - // duplicate the logic in genCSS function inside the selector node. - // future TODO - move both logics into the selector joiner visitor - if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') { - selectorElements[0].combinator.value = ' '; + + this.path = visitor.visit(this.path); + + if (!this.options.isPlugin && !this.options.inline && this.root) { + this.root = visitor.visit(this.root); } - selfElements = selfElements.concat(selectors[i].elements); - } - - this.selfSelectors = [new Selector(selfElements)]; - this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo()); -}; -module.exports = Extend; - -},{"./node":76,"./selector":82}],66:[function(require,module,exports){ -var Node = require('./node'), - Media = require('./media'), - URL = require('./url'), - Quoted = require('./quoted'), - Ruleset = require('./ruleset'), - Anonymous = require('./anonymous'), - utils = require('../utils'), - LessError = require('../less-error'); - -// -// CSS @import node -// -// The general strategy here is that we don't want to wait -// for the parsing to be completed, before we start importing -// the file. That's because in the context of a browser, -// most of the time will be spent waiting for the server to respond. -// -// On creation, we push the import path to our import queue, though -// `import,push`, we also pass it a callback, which it'll call once -// the file has been fetched, and parsed. -// -var Import = function (path, features, options, index, currentFileInfo, visibilityInfo) { - this.options = options; - this._index = index; - this._fileInfo = currentFileInfo; - this.path = path; - this.features = features; - this.allowRoot = true; - - if (this.options.less !== undefined || this.options.inline) { - this.css = !this.options.less || this.options.inline; - } else { - var pathValue = this.getPath(); - if (pathValue && /[#\.\&\?]css([\?;].*)?$/.test(pathValue)) { - this.css = true; - } - } - this.copyVisibilityInfo(visibilityInfo); - this.setParent(this.features, this); - this.setParent(this.path, this); -}; - -// -// The actual import node doesn't return anything, when converted to CSS. -// The reason is that it's used at the evaluation stage, so that the rules -// it imports can be treated like any other rules. -// -// In `eval`, we make sure all Import nodes get evaluated, recursively, so -// we end up with a flat structure, which can easily be imported in the parent -// ruleset. -// -Import.prototype = new Node(); -Import.prototype.type = 'Import'; -Import.prototype.accept = function (visitor) { - if (this.features) { - this.features = visitor.visit(this.features); - } - this.path = visitor.visit(this.path); - if (!this.options.isPlugin && !this.options.inline && this.root) { - this.root = visitor.visit(this.root); - } -}; -Import.prototype.genCSS = function (context, output) { - if (this.css && this.path._fileInfo.reference === undefined) { - output.add('@import ', this._fileInfo, this._index); - this.path.genCSS(context, output); - if (this.features) { + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + if (this.css && this.path._fileInfo.reference === undefined) { + output.add('@import ', this._fileInfo, this._index); + this.path.genCSS(context, output); + + if (this.features) { output.add(' '); this.features.genCSS(context, output); + } + + output.add(';'); } - output.add(';'); - } -}; -Import.prototype.getPath = function () { - return (this.path instanceof URL) ? - this.path.value.value : this.path.value; -}; -Import.prototype.isVariableImport = function () { - var path = this.path; - if (path instanceof URL) { - path = path.value; - } - if (path instanceof Quoted) { - return path.containsVariables(); - } + } + }, { + key: "getPath", + value: function getPath() { + return this.path instanceof URL ? this.path.value.value : this.path.value; + } + }, { + key: "isVariableImport", + value: function isVariableImport() { + var path = this.path; - return true; -}; -Import.prototype.evalForImport = function (context) { - var path = this.path; - - if (path instanceof URL) { - path = path.value; - } - - return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo()); -}; -Import.prototype.evalPath = function (context) { - var path = this.path.eval(context); - var fileInfo = this._fileInfo; - - if (!(path instanceof URL)) { - // Add the rootpath if the URL requires a rewrite - var pathValue = path.value; - if (fileInfo && - pathValue && - context.pathRequiresRewrite(pathValue)) { + if (path instanceof URL) { + path = path.value; + } + + if (path instanceof Quoted) { + return path.containsVariables(); + } + + return true; + } + }, { + key: "evalForImport", + value: function evalForImport(context) { + var path = this.path; + + if (path instanceof URL) { + path = path.value; + } + + return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo()); + } + }, { + key: "evalPath", + value: function evalPath(context) { + var path = this.path.eval(context); + var fileInfo = this._fileInfo; + + if (!(path instanceof URL)) { + // Add the rootpath if the URL requires a rewrite + var pathValue = path.value; + + if (fileInfo && pathValue && context.pathRequiresRewrite(pathValue)) { path.value = context.rewritePath(pathValue, fileInfo.rootpath); - } else { + } else { path.value = context.normalizePath(path.value); + } } - } - return path; -}; -Import.prototype.eval = function (context) { - var result = this.doEval(context); - if (this.options.reference || this.blocksVisibility()) { - if (result.length || result.length === 0) { + return path; + } + }, { + key: "eval", + value: function _eval(context) { + var result = this.doEval(context); + + if (this.options.reference || this.blocksVisibility()) { + if (result.length || result.length === 0) { result.forEach(function (node) { - node.addVisibilityBlock(); - } - ); - } else { + node.addVisibilityBlock(); + }); + } else { result.addVisibilityBlock(); + } } - } - return result; -}; -Import.prototype.doEval = function (context) { - var ruleset, registry, - features = this.features && this.features.eval(context); - if (this.options.isPlugin) { - if (this.root && this.root.eval) { + return result; + } + }, { + key: "doEval", + value: function doEval(context) { + var ruleset; + var registry; + var features = this.features && this.features.eval(context); + + if (this.options.isPlugin) { + if (this.root && this.root.eval) { try { - this.root.eval(context); - } - catch (e) { - e.message = 'Plugin error during evaluation'; - throw new LessError(e, this.root.imports, this.root.filename); + this.root.eval(context); + } catch (e) { + e.message = 'Plugin error during evaluation'; + throw new LessError(e, this.root.imports, this.root.filename); } - } - registry = context.frames[0] && context.frames[0].functionRegistry; - if ( registry && this.root && this.root.functions ) { - registry.addMultiple( this.root.functions ); - } + } - return []; - } + registry = context.frames[0] && context.frames[0].functionRegistry; - if (this.skip) { - if (typeof this.skip === 'function') { - this.skip = this.skip(); + if (registry && this.root && this.root.functions) { + registry.addMultiple(this.root.functions); + } + + return []; } + if (this.skip) { + if (typeof this.skip === 'function') { + this.skip = this.skip(); + } + + if (this.skip) { return []; + } } - } - if (this.options.inline) { - var contents = new Anonymous(this.root, 0, - { - filename: this.importedFilename, - reference: this.path._fileInfo && this.path._fileInfo.reference - }, true, true); - return this.features ? new Media([contents], this.features.value) : [contents]; - } else if (this.css) { - var newImport = new Import(this.evalPath(context), features, this.options, this._index); - if (!newImport.css && this.error) { + if (this.options.inline) { + var contents = new Anonymous(this.root, 0, { + filename: this.importedFilename, + reference: this.path._fileInfo && this.path._fileInfo.reference + }, true, true); + return this.features ? new Media([contents], this.features.value) : [contents]; + } else if (this.css) { + var newImport = new Import(this.evalPath(context), features, this.options, this._index); + + if (!newImport.css && this.error) { throw this.error; + } + + return newImport; + } else { + ruleset = new Ruleset(null, copyArray(this.root.rules)); + ruleset.evalImports(context); + return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules; } - return newImport; - } else { - ruleset = new Ruleset(null, utils.copyArray(this.root.rules)); - ruleset.evalImports(context); - - return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules; - } -}; -module.exports = Import; - -},{"../less-error":38,"../utils":89,"./anonymous":50,"./media":71,"./node":76,"./quoted":80,"./ruleset":81,"./url":85}],67:[function(require,module,exports){ -var tree = Object.create(null); - -tree.Node = require('./node'); -tree.Color = require('./color'); -tree.AtRule = require('./atrule'); -tree.DetachedRuleset = require('./detached-ruleset'); -tree.Operation = require('./operation'); -tree.Dimension = require('./dimension'); -tree.Unit = require('./unit'); -tree.Keyword = require('./keyword'); -tree.Variable = require('./variable'); -tree.Property = require('./property'); -tree.Ruleset = require('./ruleset'); -tree.Element = require('./element'); -tree.Attribute = require('./attribute'); -tree.Combinator = require('./combinator'); -tree.Selector = require('./selector'); -tree.Quoted = require('./quoted'); -tree.Expression = require('./expression'); -tree.Declaration = require('./declaration'); -tree.Call = require('./call'); -tree.URL = require('./url'); -tree.Import = require('./import'); -tree.mixin = { - Call: require('./mixin-call'), - Definition: require('./mixin-definition') -}; -tree.Comment = require('./comment'); -tree.Anonymous = require('./anonymous'); -tree.Value = require('./value'); -tree.JavaScript = require('./javascript'); -tree.Assignment = require('./assignment'); -tree.Condition = require('./condition'); -tree.Paren = require('./paren'); -tree.Media = require('./media'); -tree.UnicodeDescriptor = require('./unicode-descriptor'); -tree.Negative = require('./negative'); -tree.Extend = require('./extend'); -tree.VariableCall = require('./variable-call'); -tree.NamespaceValue = require('./namespace-value'); - -module.exports = tree; - -},{"./anonymous":50,"./assignment":51,"./atrule":52,"./attribute":53,"./call":54,"./color":55,"./combinator":56,"./comment":57,"./condition":58,"./declaration":60,"./detached-ruleset":61,"./dimension":62,"./element":63,"./expression":64,"./extend":65,"./import":66,"./javascript":68,"./keyword":70,"./media":71,"./mixin-call":72,"./mixin-definition":73,"./namespace-value":74,"./negative":75,"./node":76,"./operation":77,"./paren":78,"./property":79,"./quoted":80,"./ruleset":81,"./selector":82,"./unicode-descriptor":83,"./unit":84,"./url":85,"./value":86,"./variable":88,"./variable-call":87}],68:[function(require,module,exports){ -var JsEvalNode = require('./js-eval-node'), - Dimension = require('./dimension'), - Quoted = require('./quoted'), - Anonymous = require('./anonymous'); - -var JavaScript = function (string, escaped, index, currentFileInfo) { - this.escaped = escaped; - this.expression = string; - this._index = index; - this._fileInfo = currentFileInfo; -}; -JavaScript.prototype = new JsEvalNode(); -JavaScript.prototype.type = 'JavaScript'; -JavaScript.prototype.eval = function(context) { - var result = this.evaluateJavaScript(this.expression, context); - var type = typeof result; - - if (type === 'number' && !isNaN(result)) { - return new Dimension(result); - } else if (type === 'string') { - return new Quoted('"' + result + '"', result, this.escaped, this._index); - } else if (Array.isArray(result)) { - return new Anonymous(result.join(', ')); - } else { - return new Anonymous(result); - } -}; + } + }]); + + return Import; + }(Node); -module.exports = JavaScript; + Import.prototype.type = 'Import'; -},{"./anonymous":50,"./dimension":62,"./js-eval-node":69,"./quoted":80}],69:[function(require,module,exports){ -var Node = require('./node'), - Variable = require('./variable'); + var JsEvalNode = function JsEvalNode() {}; -var JsEvalNode = function() { -}; -JsEvalNode.prototype = new Node(); + JsEvalNode.prototype = new Node(); -JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { - var result, - that = this, - evalContext = {}; + JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { + var result; + var that = this; + var evalContext = {}; if (!context.javascriptEnabled) { - throw { message: 'Inline JavaScript is not enabled. Is it set in your options?', - filename: this.fileInfo().filename, - index: this.getIndex() }; + throw { + message: 'Inline JavaScript is not enabled. Is it set in your options?', + filename: this.fileInfo().filename, + index: this.getIndex() + }; } expression = expression.replace(/@\{([\w-]+)\}/g, function (_, name) { - return that.jsify(new Variable('@' + name, that.getIndex(), that.fileInfo()).eval(context)); + return that.jsify(new Variable("@".concat(name), that.getIndex(), that.fileInfo()).eval(context)); }); try { - expression = new Function('return (' + expression + ')'); + expression = new Function("return (".concat(expression, ")")); } catch (e) { - throw { message: 'JavaScript evaluation error: ' + e.message + ' from `' + expression + '`' , - filename: this.fileInfo().filename, - index: this.getIndex() }; + throw { + message: "JavaScript evaluation error: ".concat(e.message, " from `").concat(expression, "`"), + filename: this.fileInfo().filename, + index: this.getIndex() + }; } var variables = context.frames[0].variables(); + for (var k in variables) { - if (variables.hasOwnProperty(k)) { - /* jshint loopfunc:true */ - evalContext[k.slice(1)] = { - value: variables[k].value, - toJS: function () { - return this.value.eval(context).toCSS(); - } - }; - } + if (variables.hasOwnProperty(k)) { + /* jshint loopfunc:true */ + evalContext[k.slice(1)] = { + value: variables[k].value, + toJS: function toJS() { + return this.value.eval(context).toCSS(); + } + }; + } } try { - result = expression.call(evalContext); + result = expression.call(evalContext); } catch (e) { - throw { message: 'JavaScript evaluation error: \'' + e.name + ': ' + e.message.replace(/["]/g, '\'') + '\'' , - filename: this.fileInfo().filename, - index: this.getIndex() }; + throw { + message: "JavaScript evaluation error: '".concat(e.name, ": ").concat(e.message.replace(/["]/g, '\''), "'"), + filename: this.fileInfo().filename, + index: this.getIndex() + }; } + return result; -}; -JsEvalNode.prototype.jsify = function (obj) { - if (Array.isArray(obj.value) && (obj.value.length > 1)) { - return '[' + obj.value.map(function (v) { return v.toCSS(); }).join(', ') + ']'; + }; + + JsEvalNode.prototype.jsify = function (obj) { + if (Array.isArray(obj.value) && obj.value.length > 1) { + return "[".concat(obj.value.map(function (v) { + return v.toCSS(); + }).join(', '), "]"); } else { - return obj.toCSS(); - } -}; - -module.exports = JsEvalNode; - -},{"./node":76,"./variable":88}],70:[function(require,module,exports){ -var Node = require('./node'); - -var Keyword = function (value) { this.value = value; }; -Keyword.prototype = new Node(); -Keyword.prototype.type = 'Keyword'; -Keyword.prototype.genCSS = function (context, output) { - if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; } - output.add(this.value); -}; - -Keyword.True = new Keyword('true'); -Keyword.False = new Keyword('false'); - -module.exports = Keyword; - -},{"./node":76}],71:[function(require,module,exports){ -var Ruleset = require('./ruleset'), - Value = require('./value'), - Selector = require('./selector'), - Anonymous = require('./anonymous'), - Expression = require('./expression'), - AtRule = require('./atrule'), - utils = require('../utils'); - -var Media = function (value, features, index, currentFileInfo, visibilityInfo) { - this._index = index; - this._fileInfo = currentFileInfo; - - var selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors(); - - this.features = new Value(features); - this.rules = [new Ruleset(selectors, value)]; - this.rules[0].allowImports = true; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; - this.setParent(selectors, this); - this.setParent(this.features, this); - this.setParent(this.rules, this); -}; -Media.prototype = new AtRule(); -Media.prototype.type = 'Media'; -Media.prototype.isRulesetLike = function() { return true; }; -Media.prototype.accept = function (visitor) { - if (this.features) { - this.features = visitor.visit(this.features); - } - if (this.rules) { - this.rules = visitor.visitArray(this.rules); - } -}; -Media.prototype.genCSS = function (context, output) { - output.add('@media ', this._fileInfo, this._index); - this.features.genCSS(context, output); - this.outputRuleset(context, output, this.rules); -}; -Media.prototype.eval = function (context) { - if (!context.mediaBlocks) { - context.mediaBlocks = []; - context.mediaPath = []; + return obj.toCSS(); } + }; - var media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo()); - if (this.debugInfo) { - this.rules[0].debugInfo = this.debugInfo; - media.debugInfo = this.debugInfo; + var JavaScript = + /*#__PURE__*/ + function (_JsEvalNode) { + _inherits(JavaScript, _JsEvalNode); + + function JavaScript(string, escaped, index, currentFileInfo) { + var _this; + + _classCallCheck(this, JavaScript); + + _this.escaped = escaped; + _this.expression = string; + _this._index = index; + _this._fileInfo = currentFileInfo; + return _possibleConstructorReturn(_this); } - - media.features = this.features.eval(context); - context.mediaPath.push(media); - context.mediaBlocks.push(media); + _createClass(JavaScript, [{ + key: "eval", + value: function _eval(context) { + var result = this.evaluateJavaScript(this.expression, context); - this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit(); - context.frames.unshift(this.rules[0]); - media.rules = [this.rules[0].eval(context)]; - context.frames.shift(); + var type = _typeof(result); - context.mediaPath.pop(); + if (type === 'number' && !isNaN(result)) { + return new Dimension(result); + } else if (type === 'string') { + return new Quoted("\"".concat(result, "\""), result, this.escaped, this._index); + } else if (Array.isArray(result)) { + return new Anonymous(result.join(', ')); + } else { + return new Anonymous(result); + } + } + }]); - return context.mediaPath.length === 0 ? media.evalTop(context) : - media.evalNested(context); -}; -Media.prototype.evalTop = function (context) { - var result = this; + return JavaScript; + }(JsEvalNode); - // Render all dependent Media blocks. - if (context.mediaBlocks.length > 1) { - var selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors(); - result = new Ruleset(selectors, context.mediaBlocks); - result.multiMedia = true; - result.copyVisibilityInfo(this.visibilityInfo()); - this.setParent(result, this); - } + JavaScript.prototype.type = 'JavaScript'; - delete context.mediaBlocks; - delete context.mediaPath; + var Assignment = + /*#__PURE__*/ + function (_Node) { + _inherits(Assignment, _Node); - return result; -}; -Media.prototype.evalNested = function (context) { - var i, value, - path = context.mediaPath.concat([this]); + function Assignment(key, val) { + var _this; - // Extract the media-query conditions separated with `,` (OR). - for (i = 0; i < path.length; i++) { - value = path[i].features instanceof Value ? - path[i].features.value : path[i].features; - path[i] = Array.isArray(value) ? value : [value]; - } + _classCallCheck(this, Assignment); - // Trace all permutations to generate the resulting media-query. - // - // (a, b and c) with nested (d, e) -> - // a and d - // a and e - // b and c and d - // b and c and e - this.features = new Value(this.permute(path).map(function (path) { - path = path.map(function (fragment) { - return fragment.toCSS ? fragment : new Anonymous(fragment); - }); + _this.key = key; + _this.value = val; + return _possibleConstructorReturn(_this); + } - for (i = path.length - 1; i > 0; i--) { - path.splice(i, 0, new Anonymous('and')); + _createClass(Assignment, [{ + key: "accept", + value: function accept(visitor) { + this.value = visitor.visit(this.value); + } + }, { + key: "eval", + value: function _eval(context) { + if (this.value.eval) { + return new Assignment(this.key, this.value.eval(context)); } - return new Expression(path); - })); - this.setParent(this.features, this); + return this; + } + }, { + key: "genCSS", + value: function genCSS(context, output) { + output.add("".concat(this.key, "=")); - // Fake a tree-node that doesn't output anything. - return new Ruleset([], []); -}; -Media.prototype.permute = function (arr) { - if (arr.length === 0) { - return []; - } else if (arr.length === 1) { - return arr[0]; - } else { - var result = []; - var rest = this.permute(arr.slice(1)); - for (var i = 0; i < rest.length; i++) { - for (var j = 0; j < arr[0].length; j++) { - result.push([arr[0][j]].concat(rest[i])); - } + if (this.value.genCSS) { + this.value.genCSS(context, output); + } else { + output.add(this.value); } - return result; - } -}; -Media.prototype.bubbleSelectors = function (selectors) { - if (!selectors) { - return; - } - this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])]; - this.setParent(this.rules, this); -}; -module.exports = Media; - -},{"../utils":89,"./anonymous":50,"./atrule":52,"./expression":64,"./ruleset":81,"./selector":82,"./value":86}],72:[function(require,module,exports){ -var Node = require('./node'), - Selector = require('./selector'), - MixinDefinition = require('./mixin-definition'), - defaultFunc = require('../functions/default'); - -var MixinCall = function (elements, args, index, currentFileInfo, important) { - this.selector = new Selector(elements); - this.arguments = args || []; - this._index = index; - this._fileInfo = currentFileInfo; - this.important = important; - this.allowRoot = true; - this.setParent(this.selector, this); -}; -MixinCall.prototype = new Node(); -MixinCall.prototype.type = 'MixinCall'; -MixinCall.prototype.accept = function (visitor) { - if (this.selector) { - this.selector = visitor.visit(this.selector); - } - if (this.arguments.length) { - this.arguments = visitor.visitArray(this.arguments); - } -}; -MixinCall.prototype.eval = function (context) { - var mixins, mixin, mixinPath, args = [], arg, argValue, - rules = [], match = false, i, m, f, isRecursive, isOneFound, - candidates = [], candidate, conditionResult = [], defaultResult, defFalseEitherCase = -1, - defNone = 0, defTrue = 1, defFalse = 2, count, originalRuleset, noArgumentsFilter; + } + }]); - this.selector = this.selector.eval(context); + return Assignment; + }(Node); - function calcDefGroup(mixin, mixinPath) { - var f, p, namespace; + Assignment.prototype.type = 'Assignment'; - for (f = 0; f < 2; f++) { - conditionResult[f] = true; - defaultFunc.value(f); - for (p = 0; p < mixinPath.length && conditionResult[f]; p++) { - namespace = mixinPath[p]; - if (namespace.matchCondition) { - conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context); - } - } - if (mixin.matchCondition) { - conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context); - } - } - if (conditionResult[0] || conditionResult[1]) { - if (conditionResult[0] != conditionResult[1]) { - return conditionResult[1] ? - defTrue : defFalse; - } + var Condition = + /*#__PURE__*/ + function (_Node) { + _inherits(Condition, _Node); - return defNone; - } - return defFalseEitherCase; - } + function Condition(op, l, r, i, negate) { + var _this; - for (i = 0; i < this.arguments.length; i++) { - arg = this.arguments[i]; - argValue = arg.value.eval(context); - if (arg.expand && Array.isArray(argValue.value)) { - argValue = argValue.value; - for (m = 0; m < argValue.length; m++) { - args.push({value: argValue[m]}); - } - } else { - args.push({name: arg.name, value: argValue}); - } + _classCallCheck(this, Condition); + + _this.op = op.trim(); + _this.lvalue = l; + _this.rvalue = r; + _this._index = i; + _this.negate = negate; + return _possibleConstructorReturn(_this); } - noArgumentsFilter = function(rule) {return rule.matchArgs(null, context);}; + _createClass(Condition, [{ + key: "accept", + value: function accept(visitor) { + this.lvalue = visitor.visit(this.lvalue); + this.rvalue = visitor.visit(this.rvalue); + } + }, { + key: "eval", + value: function _eval(context) { + var result = function (op, a, b) { + switch (op) { + case 'and': + return a && b; - for (i = 0; i < context.frames.length; i++) { - if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) { - isOneFound = true; + case 'or': + return a || b; - // To make `default()` function independent of definition order we have two "subpasses" here. - // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`), - // and build candidate list with corresponding flags. Then, when we know all possible matches, - // we make a final decision. + default: + switch (Node.compare(a, b)) { + case -1: + return op === '<' || op === '=<' || op === '<='; - for (m = 0; m < mixins.length; m++) { - mixin = mixins[m].rule; - mixinPath = mixins[m].path; - isRecursive = false; - for (f = 0; f < context.frames.length; f++) { - if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) { - isRecursive = true; - break; - } - } - if (isRecursive) { - continue; - } + case 0: + return op === '=' || op === '>=' || op === '=<' || op === '<='; - if (mixin.matchArgs(args, context)) { - candidate = {mixin: mixin, group: calcDefGroup(mixin, mixinPath)}; + case 1: + return op === '>' || op === '>='; - if (candidate.group !== defFalseEitherCase) { - candidates.push(candidate); - } + default: + return false; + } - match = true; - } - } + } + }(this.op, this.lvalue.eval(context), this.rvalue.eval(context)); - defaultFunc.reset(); + return this.negate ? !result : result; + } + }]); - count = [0, 0, 0]; - for (m = 0; m < candidates.length; m++) { - count[candidates[m].group]++; - } + return Condition; + }(Node); - if (count[defNone] > 0) { - defaultResult = defFalse; - } else { - defaultResult = defTrue; - if ((count[defTrue] + count[defFalse]) > 1) { - throw { type: 'Runtime', - message: 'Ambiguous use of `default()` found when matching for `' + this.format(args) + '`', - index: this.getIndex(), filename: this.fileInfo().filename }; - } - } + Condition.prototype.type = 'Condition'; - for (m = 0; m < candidates.length; m++) { - candidate = candidates[m].group; - if ((candidate === defNone) || (candidate === defaultResult)) { - try { - mixin = candidates[m].mixin; - if (!(mixin instanceof MixinDefinition)) { - originalRuleset = mixin.originalRuleset || mixin; - mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo()); - mixin.originalRuleset = originalRuleset; - } - var newRules = mixin.evalCall(context, args, this.important).rules; - this._setVisibilityToReplacement(newRules); - Array.prototype.push.apply(rules, newRules); - } catch (e) { - throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack }; - } - } - } + var UnicodeDescriptor = + /*#__PURE__*/ + function (_Node) { + _inherits(UnicodeDescriptor, _Node); - if (match) { - return rules; - } - } - } - if (isOneFound) { - throw { type: 'Runtime', - message: 'No matching definition was found for `' + this.format(args) + '`', - index: this.getIndex(), filename: this.fileInfo().filename }; - } else { - throw { type: 'Name', - message: this.selector.toCSS().trim() + ' is undefined', - index: this.getIndex(), filename: this.fileInfo().filename }; - } -}; + function UnicodeDescriptor(value) { + var _this; -MixinCall.prototype._setVisibilityToReplacement = function (replacement) { - var i, rule; - if (this.blocksVisibility()) { - for (i = 0; i < replacement.length; i++) { - rule = replacement[i]; - rule.addVisibilityBlock(); - } - } -}; -MixinCall.prototype.format = function (args) { - return this.selector.toCSS().trim() + '(' + - (args ? args.map(function (a) { - var argValue = ''; - if (a.name) { - argValue += a.name + ':'; - } - if (a.value.toCSS) { - argValue += a.value.toCSS(); - } else { - argValue += '???'; - } - return argValue; - }).join(', ') : '') + ')'; -}; -module.exports = MixinCall; - -},{"../functions/default":25,"./mixin-definition":73,"./node":76,"./selector":82}],73:[function(require,module,exports){ -var Selector = require('./selector'), - Element = require('./element'), - Ruleset = require('./ruleset'), - Declaration = require('./declaration'), - DetachedRuleset = require('./detached-ruleset'), - Expression = require('./expression'), - contexts = require('../contexts'), - utils = require('../utils'); - -var Definition = function (name, params, rules, condition, variadic, frames, visibilityInfo) { - this.name = name || 'anonymous mixin'; - this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])]; - this.params = params; - this.condition = condition; - this.variadic = variadic; - this.arity = params.length; - this.rules = rules; - this._lookups = {}; - var optionalParameters = []; - this.required = params.reduce(function (count, p) { - if (!p.name || (p.name && !p.value)) { - return count + 1; - } - else { - optionalParameters.push(p.name); - return count; - } - }, 0); - this.optionalParameters = optionalParameters; - this.frames = frames; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; -}; -Definition.prototype = new Ruleset(); -Definition.prototype.type = 'MixinDefinition'; -Definition.prototype.evalFirst = true; -Definition.prototype.accept = function (visitor) { - if (this.params && this.params.length) { - this.params = visitor.visitArray(this.params); - } - this.rules = visitor.visitArray(this.rules); - if (this.condition) { - this.condition = visitor.visit(this.condition); - } -}; -Definition.prototype.evalParams = function (context, mixinEnv, args, evaldArguments) { - /* jshint boss:true */ - var frame = new Ruleset(null, null), - varargs, arg, - params = utils.copyArray(this.params), - i, j, val, name, isNamedFound, argIndex, argsLength = 0; - - if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) { - frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit(); - } - mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames)); - - if (args) { - args = utils.copyArray(args); - argsLength = args.length; - - for (i = 0; i < argsLength; i++) { - arg = args[i]; - if (name = (arg && arg.name)) { - isNamedFound = false; - for (j = 0; j < params.length; j++) { - if (!evaldArguments[j] && name === params[j].name) { - evaldArguments[j] = arg.value.eval(context); - frame.prependRule(new Declaration(name, arg.value.eval(context))); - isNamedFound = true; - break; - } - } - if (isNamedFound) { - args.splice(i, 1); - i--; - continue; - } else { - throw { type: 'Runtime', message: 'Named argument for ' + this.name + - ' ' + args[i].name + ' not found' }; - } - } - } + _classCallCheck(this, UnicodeDescriptor); + + _this.value = value; + return _possibleConstructorReturn(_this); } - argIndex = 0; - for (i = 0; i < params.length; i++) { - if (evaldArguments[i]) { continue; } - arg = args && args[argIndex]; + return UnicodeDescriptor; + }(Node); - if (name = params[i].name) { - if (params[i].variadic) { - varargs = []; - for (j = argIndex; j < argsLength; j++) { - varargs.push(args[j].value.eval(context)); - } - frame.prependRule(new Declaration(name, new Expression(varargs).eval(context))); - } else { - val = arg && arg.value; - if (val) { - // This was a mixin call, pass in a detached ruleset of it's eval'd rules - if (Array.isArray(val)) { - val = new DetachedRuleset(new Ruleset('', val)); - } - else { - val = val.eval(context); - } - } else if (params[i].value) { - val = params[i].value.eval(mixinEnv); - frame.resetCache(); - } else { - throw { type: 'Runtime', message: 'wrong number of arguments for ' + this.name + - ' (' + argsLength + ' for ' + this.arity + ')' }; - } + UnicodeDescriptor.prototype.type = 'UnicodeDescriptor'; - frame.prependRule(new Declaration(name, val)); - evaldArguments[i] = val; - } - } + var Negative = + /*#__PURE__*/ + function (_Node) { + _inherits(Negative, _Node); - if (params[i].variadic && args) { - for (j = argIndex; j < argsLength; j++) { - evaldArguments[j] = args[j].value.eval(context); - } - } - argIndex++; - } + function Negative(node) { + var _this; - return frame; -}; -Definition.prototype.makeImportant = function() { - var rules = !this.rules ? this.rules : this.rules.map(function (r) { - if (r.makeImportant) { - return r.makeImportant(true); - } else { - return r; - } - }); - var result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames); - return result; -}; -Definition.prototype.eval = function (context) { - return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames)); -}; -Definition.prototype.evalCall = function (context, args, important) { - var _arguments = [], - mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames, - frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments), - rules, ruleset; - - frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context))); - - rules = utils.copyArray(this.rules); - - ruleset = new Ruleset(null, rules); - ruleset.originalRuleset = this; - ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames))); - if (important) { - ruleset = ruleset.makeImportant(); - } - return ruleset; -}; -Definition.prototype.matchCondition = function (args, context) { - if (this.condition && !this.condition.eval( - new contexts.Eval(context, - [this.evalParams(context, /* the parameter variables */ - new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])] - .concat(this.frames || []) // the parent namespace/mixin frames - .concat(context.frames)))) { // the current environment frames - return false; + _classCallCheck(this, Negative); + + _this.value = node; + return _possibleConstructorReturn(_this); } - return true; -}; -Definition.prototype.matchArgs = function (args, context) { - var allArgsCnt = (args && args.length) || 0, len, optionalParameters = this.optionalParameters; - var requiredArgsCnt = !args ? 0 : args.reduce(function (count, p) { - if (optionalParameters.indexOf(p.name) < 0) { - return count + 1; - } else { - return count; - } - }, 0); - if (!this.variadic) { - if (requiredArgsCnt < this.required) { - return false; - } - if (allArgsCnt > this.params.length) { - return false; - } - } else { - if (requiredArgsCnt < (this.required - 1)) { - return false; + _createClass(Negative, [{ + key: "genCSS", + value: function genCSS(context, output) { + output.add('-'); + this.value.genCSS(context, output); + } + }, { + key: "eval", + value: function _eval(context) { + if (context.isMathOn()) { + return new Operation('*', [new Dimension(-1), this.value]).eval(context); } - } - // check patterns - len = Math.min(requiredArgsCnt, this.arity); + return new Negative(this.value.eval(context)); + } + }]); - for (var i = 0; i < len; i++) { - if (!this.params[i].name && !this.params[i].variadic) { - if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) { - return false; - } - } - } - return true; -}; -module.exports = Definition; - -},{"../contexts":13,"../utils":89,"./declaration":60,"./detached-ruleset":61,"./element":63,"./expression":64,"./ruleset":81,"./selector":82}],74:[function(require,module,exports){ -var Node = require('./node'), - Variable = require('./variable'), - Ruleset = require('./ruleset'), - Selector = require('./selector'); - -var NamespaceValue = function (ruleCall, lookups, important, index, fileInfo) { - this.value = ruleCall; - this.lookups = lookups; - this.important = important; - this._index = index; - this._fileInfo = fileInfo; -}; -NamespaceValue.prototype = new Node(); -NamespaceValue.prototype.type = 'NamespaceValue'; -NamespaceValue.prototype.eval = function (context) { - var i, j, name, rules = this.value.eval(context); - - for (i = 0; i < this.lookups.length; i++) { - name = this.lookups[i]; + return Negative; + }(Node); - /** - * Eval'd DRs return rulesets. - * Eval'd mixins return rules, so let's make a ruleset if we need it. - * We need to do this because of late parsing of values - */ - if (Array.isArray(rules)) { - rules = new Ruleset([new Selector()], rules); - } + Negative.prototype.type = 'Negative'; - if (name === '') { - rules = rules.lastDeclaration(); - } - else if (name.charAt(0) === '@') { - if (name.charAt(1) === '@') { - name = '@' + new Variable(name.substr(1)).eval(context).value; - } - if (rules.variables) { - rules = rules.variable(name); - } - - if (!rules) { - throw { type: 'Name', - message: 'variable ' + name + ' not found', - filename: this.fileInfo().filename, - index: this.getIndex() }; - } + var Extend = + /*#__PURE__*/ + function (_Node) { + _inherits(Extend, _Node); + + function Extend(selector, option, index, currentFileInfo, visibilityInfo) { + var _this; + + _classCallCheck(this, Extend); + + _this.selector = selector; + _this.option = option; + _this.object_id = Extend.next_id++; + _this.parent_ids = [_this.object_id]; + _this._index = index; + _this._fileInfo = currentFileInfo; + + _this.copyVisibilityInfo(visibilityInfo); + + _this.allowRoot = true; + + switch (option) { + case 'all': + _this.allowBefore = true; + _this.allowAfter = true; + break; + + default: + _this.allowBefore = false; + _this.allowAfter = false; + break; + } + + _this.setParent(_this.selector, _assertThisInitialized(_this)); + + return _possibleConstructorReturn(_this); + } + + _createClass(Extend, [{ + key: "accept", + value: function accept(visitor) { + this.selector = visitor.visit(this.selector); + } + }, { + key: "eval", + value: function _eval(context) { + return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + }, { + key: "clone", + value: function clone(context) { + return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } // it concatenates (joins) all selectors in selector array + + }, { + key: "findSelfSelectors", + value: function findSelfSelectors(selectors) { + var selfElements = []; + var i; + var selectorElements; + + for (i = 0; i < selectors.length; i++) { + selectorElements = selectors[i].elements; // duplicate the logic in genCSS function inside the selector node. + // future TODO - move both logics into the selector joiner visitor + + if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') { + selectorElements[0].combinator.value = ' '; + } + + selfElements = selfElements.concat(selectors[i].elements); } - else { - if (name.substring(0, 2) === '$@') { - name = '$' + new Variable(name.substr(1)).eval(context).value; + + this.selfSelectors = [new Selector(selfElements)]; + this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo()); + } + }]); + + return Extend; + }(Node); + + Extend.next_id = 0; + Extend.prototype.type = 'Extend'; + + var VariableCall = + /*#__PURE__*/ + function (_Node) { + _inherits(VariableCall, _Node); + + function VariableCall(variable, index, currentFileInfo) { + var _this; + + _classCallCheck(this, VariableCall); + + _this.variable = variable; + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.allowRoot = true; + return _possibleConstructorReturn(_this); + } + + _createClass(VariableCall, [{ + key: "eval", + value: function _eval(context) { + var rules; + var detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context); + var error = new LessError({ + message: "Could not evaluate variable call ".concat(this.variable) + }); + + if (!detachedRuleset.ruleset) { + if (detachedRuleset.rules) { + rules = detachedRuleset; + } else if (Array.isArray(detachedRuleset)) { + rules = new Ruleset('', detachedRuleset); + } else if (Array.isArray(detachedRuleset.value)) { + rules = new Ruleset('', detachedRuleset.value); + } else { + throw error; + } + + detachedRuleset = new DetachedRuleset(rules); + } + + if (detachedRuleset.ruleset) { + return detachedRuleset.callEval(context); + } + + throw error; + } + }]); + + return VariableCall; + }(Node); + + VariableCall.prototype.type = 'VariableCall'; + + var NamespaceValue = + /*#__PURE__*/ + function (_Node) { + _inherits(NamespaceValue, _Node); + + function NamespaceValue(ruleCall, lookups, important, index, fileInfo) { + var _this; + + _classCallCheck(this, NamespaceValue); + + _this.value = ruleCall; + _this.lookups = lookups; + _this.important = important; + _this._index = index; + _this._fileInfo = fileInfo; + return _possibleConstructorReturn(_this); + } + + _createClass(NamespaceValue, [{ + key: "eval", + value: function _eval(context) { + var i; + var name; + var rules = this.value.eval(context); + + for (i = 0; i < this.lookups.length; i++) { + name = this.lookups[i]; + /** + * Eval'd DRs return rulesets. + * Eval'd mixins return rules, so let's make a ruleset if we need it. + * We need to do this because of late parsing of values + */ + + if (Array.isArray(rules)) { + rules = new Ruleset([new Selector()], rules); + } + + if (name === '') { + rules = rules.lastDeclaration(); + } else if (name.charAt(0) === '@') { + if (name.charAt(1) === '@') { + name = "@".concat(new Variable(name.substr(1)).eval(context).value); + } + + if (rules.variables) { + rules = rules.variable(name); } - else { - name = name.charAt(0) === '$' ? name : '$' + name; + + if (!rules) { + throw { + type: 'Name', + message: "variable ".concat(name, " not found"), + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + } else { + if (name.substring(0, 2) === '$@') { + name = "$".concat(new Variable(name.substr(1)).eval(context).value); + } else { + name = name.charAt(0) === '$' ? name : "$".concat(name); } + if (rules.properties) { - rules = rules.property(name); + rules = rules.property(name); } - + if (!rules) { - throw { type: 'Name', - message: 'property "' + name.substr(1) + '" not found', - filename: this.fileInfo().filename, - index: this.getIndex() }; - } - // Properties are an array of values, since a ruleset can have multiple props. + throw { + type: 'Name', + message: "property \"".concat(name.substr(1), "\" not found"), + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } // Properties are an array of values, since a ruleset can have multiple props. // We pick the last one (the "cascaded" value) + + rules = rules[rules.length - 1]; - } + } - if (rules.value) { + if (rules.value) { rules = rules.eval(context).value; - } - if (rules.ruleset) { + } + + if (rules.ruleset) { rules = rules.ruleset.eval(context); + } } - } - return rules; -}; -module.exports = NamespaceValue; - -},{"./node":76,"./ruleset":81,"./selector":82,"./variable":88}],75:[function(require,module,exports){ -var Node = require('./node'), - Operation = require('./operation'), - Dimension = require('./dimension'); - -var Negative = function (node) { - this.value = node; -}; -Negative.prototype = new Node(); -Negative.prototype.type = 'Negative'; -Negative.prototype.genCSS = function (context, output) { - output.add('-'); - this.value.genCSS(context, output); -}; -Negative.prototype.eval = function (context) { - if (context.isMathOn()) { - return (new Operation('*', [new Dimension(-1), this.value])).eval(context); - } - return new Negative(this.value.eval(context)); -}; -module.exports = Negative; - -},{"./dimension":62,"./node":76,"./operation":77}],76:[function(require,module,exports){ -var Node = function() { - this.parent = null; - this.visibilityBlocks = undefined; - this.nodeVisible = undefined; - this.rootNode = null; - this.parsed = null; - - var self = this; - Object.defineProperty(this, 'currentFileInfo', { - get: function() { return self.fileInfo(); } - }); - Object.defineProperty(this, 'index', { - get: function() { return self.getIndex(); } - }); -}; -Node.prototype.setParent = function(nodes, parent) { - function set(node) { - if (node && node instanceof Node) { - node.parent = parent; - } - } - if (Array.isArray(nodes)) { - nodes.forEach(set); - } - else { - set(nodes); - } -}; -Node.prototype.getIndex = function() { - return this._index || (this.parent && this.parent.getIndex()) || 0; -}; -Node.prototype.fileInfo = function() { - return this._fileInfo || (this.parent && this.parent.fileInfo()) || {}; -}; -Node.prototype.isRulesetLike = function() { return false; }; -Node.prototype.toCSS = function (context) { - var strs = []; - this.genCSS(context, { - add: function(chunk, fileInfo, index) { - strs.push(chunk); - }, - isEmpty: function () { - return strs.length === 0; + return rules; + } + }]); + + return NamespaceValue; + }(Node); + + NamespaceValue.prototype.type = 'NamespaceValue'; + + var Definition = + /*#__PURE__*/ + function (_Ruleset) { + _inherits(Definition, _Ruleset); + + function Definition(name, params, rules, condition, variadic, frames, visibilityInfo) { + var _this; + + _classCallCheck(this, Definition); + + _this.name = name || 'anonymous mixin'; + _this.selectors = [new Selector([new Element(null, name, false, _this._index, _this._fileInfo)])]; + _this.params = params; + _this.condition = condition; + _this.variadic = variadic; + _this.arity = params.length; + _this.rules = rules; + _this._lookups = {}; + var optionalParameters = []; + _this.required = params.reduce(function (count, p) { + if (!p.name || p.name && !p.value) { + return count + 1; + } else { + optionalParameters.push(p.name); + return count; } - }); - return strs.join(''); -}; -Node.prototype.genCSS = function (context, output) { - output.add(this.value); -}; -Node.prototype.accept = function (visitor) { - this.value = visitor.visit(this.value); -}; -Node.prototype.eval = function () { return this; }; -Node.prototype._operate = function (context, op, a, b) { - switch (op) { - case '+': return a + b; - case '-': return a - b; - case '*': return a * b; - case '/': return a / b; - } -}; -Node.prototype.fround = function(context, value) { - var precision = context && context.numPrecision; - // add "epsilon" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded: - return (precision) ? Number((value + 2e-16).toFixed(precision)) : value; -}; -Node.compare = function (a, b) { - /* returns: - -1: a < b - 0: a = b - 1: a > b - and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */ + }, 0); + _this.optionalParameters = optionalParameters; + _this.frames = frames; - if ((a.compare) && - // for "symmetric results" force toCSS-based comparison - // of Quoted or Anonymous if either value is one of those - !(b.type === 'Quoted' || b.type === 'Anonymous')) { - return a.compare(b); - } else if (b.compare) { - return -b.compare(a); - } else if (a.type !== b.type) { - return undefined; - } + _this.copyVisibilityInfo(visibilityInfo); - a = a.value; - b = b.value; - if (!Array.isArray(a)) { - return a === b ? 0 : undefined; - } - if (a.length !== b.length) { - return undefined; - } - for (var i = 0; i < a.length; i++) { - if (Node.compare(a[i], b[i]) !== 0) { - return undefined; - } - } - return 0; -}; - -Node.numericCompare = function (a, b) { - return a < b ? -1 - : a === b ? 0 - : a > b ? 1 : undefined; -}; -// Returns true if this node represents root of ast imported by reference -Node.prototype.blocksVisibility = function () { - if (this.visibilityBlocks == null) { - this.visibilityBlocks = 0; - } - return this.visibilityBlocks !== 0; -}; -Node.prototype.addVisibilityBlock = function () { - if (this.visibilityBlocks == null) { - this.visibilityBlocks = 0; - } - this.visibilityBlocks = this.visibilityBlocks + 1; -}; -Node.prototype.removeVisibilityBlock = function () { - if (this.visibilityBlocks == null) { - this.visibilityBlocks = 0; - } - this.visibilityBlocks = this.visibilityBlocks - 1; -}; -// Turns on node visibility - if called node will be shown in output regardless -// of whether it comes from import by reference or not -Node.prototype.ensureVisibility = function () { - this.nodeVisible = true; -}; -// Turns off node visibility - if called node will NOT be shown in output regardless -// of whether it comes from import by reference or not -Node.prototype.ensureInvisibility = function () { - this.nodeVisible = false; -}; -// return values: -// false - the node must not be visible -// true - the node must be visible -// undefined or null - the node has the same visibility as its parent -Node.prototype.isVisible = function () { - return this.nodeVisible; -}; -Node.prototype.visibilityInfo = function() { - return { - visibilityBlocks: this.visibilityBlocks, - nodeVisible: this.nodeVisible - }; -}; -Node.prototype.copyVisibilityInfo = function(info) { - if (!info) { - return; + _this.allowRoot = true; + return _possibleConstructorReturn(_this); } - this.visibilityBlocks = info.visibilityBlocks; - this.nodeVisible = info.nodeVisible; -}; -module.exports = Node; - -},{}],77:[function(require,module,exports){ -var Node = require('./node'), - Color = require('./color'), - Dimension = require('./dimension'), - MATH = require('../constants').Math; - -var Operation = function (op, operands, isSpaced) { - this.op = op.trim(); - this.operands = operands; - this.isSpaced = isSpaced; -}; -Operation.prototype = new Node(); -Operation.prototype.type = 'Operation'; -Operation.prototype.accept = function (visitor) { - this.operands = visitor.visitArray(this.operands); -}; -Operation.prototype.eval = function (context) { - var a = this.operands[0].eval(context), - b = this.operands[1].eval(context), - op; - - if (context.isMathOn(this.op)) { - op = this.op === './' ? '/' : this.op; - if (a instanceof Dimension && b instanceof Color) { - a = a.toColor(); + + _createClass(Definition, [{ + key: "accept", + value: function accept(visitor) { + if (this.params && this.params.length) { + this.params = visitor.visitArray(this.params); } - if (b instanceof Dimension && a instanceof Color) { - b = b.toColor(); + + this.rules = visitor.visitArray(this.rules); + + if (this.condition) { + this.condition = visitor.visit(this.condition); } - if (!a.operate) { - if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) { - return new Operation(this.op, [a, b], this.isSpaced); - } - throw { type: 'Operation', - message: 'Operation on an invalid type' }; + } + }, { + key: "evalParams", + value: function evalParams(context, mixinEnv, args, evaldArguments) { + /* jshint boss:true */ + var frame = new Ruleset(null, null); + var varargs; + var arg; + var params = copyArray(this.params); + var i; + var j; + var val; + var name; + var isNamedFound; + var argIndex; + var argsLength = 0; + + if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) { + frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit(); } - return a.operate(context, op, b); - } else { - return new Operation(this.op, [a, b], this.isSpaced); - } -}; -Operation.prototype.genCSS = function (context, output) { - this.operands[0].genCSS(context, output); - if (this.isSpaced) { - output.add(' '); - } - output.add(this.op); - if (this.isSpaced) { - output.add(' '); - } - this.operands[1].genCSS(context, output); -}; - -module.exports = Operation; - -},{"../constants":12,"./color":55,"./dimension":62,"./node":76}],78:[function(require,module,exports){ -var Node = require('./node'); - -var Paren = function (node) { - this.value = node; -}; -Paren.prototype = new Node(); -Paren.prototype.type = 'Paren'; -Paren.prototype.genCSS = function (context, output) { - output.add('('); - this.value.genCSS(context, output); - output.add(')'); -}; -Paren.prototype.eval = function (context) { - return new Paren(this.value.eval(context)); -}; -module.exports = Paren; - -},{"./node":76}],79:[function(require,module,exports){ -var Node = require('./node'), - Declaration = require('./declaration'); - -var Property = function (name, index, currentFileInfo) { - this.name = name; - this._index = index; - this._fileInfo = currentFileInfo; -}; -Property.prototype = new Node(); -Property.prototype.type = 'Property'; -Property.prototype.eval = function (context) { - var property, name = this.name; - // TODO: shorten this reference - var mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules; - - if (this.evaluating) { - throw { type: 'Name', - message: 'Recursive property reference for ' + name, - filename: this.fileInfo().filename, - index: this.getIndex() }; - } + mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames)); - this.evaluating = true; + if (args) { + args = copyArray(args); + argsLength = args.length; - property = this.find(context.frames, function (frame) { + for (i = 0; i < argsLength; i++) { + arg = args[i]; - var v, vArr = frame.property(name); - if (vArr) { - for (var i = 0; i < vArr.length; i++) { - v = vArr[i]; - - vArr[i] = new Declaration(v.name, - v.value, - v.important, - v.merge, - v.index, - v.currentFileInfo, - v.inline, - v.variable - ); - } - mergeRules(vArr); + if (name = arg && arg.name) { + isNamedFound = false; - v = vArr[vArr.length - 1]; - if (v.important) { - var importantScope = context.importantScope[context.importantScope.length - 1]; - importantScope.important = v.important; + for (j = 0; j < params.length; j++) { + if (!evaldArguments[j] && name === params[j].name) { + evaldArguments[j] = arg.value.eval(context); + frame.prependRule(new Declaration(name, arg.value.eval(context))); + isNamedFound = true; + break; + } + } + + if (isNamedFound) { + args.splice(i, 1); + i--; + continue; + } else { + throw { + type: 'Runtime', + message: "Named argument for ".concat(this.name, " ").concat(args[i].name, " not found") + }; + } } - v = v.value.eval(context); - return v; + } } - }); - if (property) { - this.evaluating = false; - return property; - } else { - throw { type: 'Name', - message: 'Property \'' + name + '\' is undefined', - filename: this.currentFileInfo.filename, - index: this.index }; - } -}; -Property.prototype.find = function (obj, fun) { - for (var i = 0, r; i < obj.length; i++) { - r = fun.call(obj, obj[i]); - if (r) { return r; } - } - return null; -}; -module.exports = Property; - -},{"./declaration":60,"./node":76}],80:[function(require,module,exports){ -var Node = require('./node'), - Variable = require('./variable'), - Property = require('./property'); - -var Quoted = function (str, content, escaped, index, currentFileInfo) { - this.escaped = (escaped == null) ? true : escaped; - this.value = content || ''; - this.quote = str.charAt(0); - this._index = index; - this._fileInfo = currentFileInfo; - this.variableRegex = /@\{([\w-]+)\}/g; - this.propRegex = /\$\{([\w-]+)\}/g; -}; -Quoted.prototype = new Node(); -Quoted.prototype.type = 'Quoted'; -Quoted.prototype.genCSS = function (context, output) { - if (!this.escaped) { - output.add(this.quote, this.fileInfo(), this.getIndex()); - } - output.add(this.value); - if (!this.escaped) { - output.add(this.quote); - } -}; -Quoted.prototype.containsVariables = function() { - return this.value.match(this.variableRegex); -}; -Quoted.prototype.eval = function (context) { - var that = this, value = this.value; - var variableReplacement = function (_, name) { - var v = new Variable('@' + name, that.getIndex(), that.fileInfo()).eval(context, true); - return (v instanceof Quoted) ? v.value : v.toCSS(); - }; - var propertyReplacement = function (_, name) { - var v = new Property('$' + name, that.getIndex(), that.fileInfo()).eval(context, true); - return (v instanceof Quoted) ? v.value : v.toCSS(); - }; - function iterativeReplace(value, regexp, replacementFnc) { - var evaluatedValue = value; - do { - value = evaluatedValue; - evaluatedValue = value.replace(regexp, replacementFnc); - } while (value !== evaluatedValue); - return evaluatedValue; - } - value = iterativeReplace(value, this.variableRegex, variableReplacement); - value = iterativeReplace(value, this.propRegex, propertyReplacement); - return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo()); -}; -Quoted.prototype.compare = function (other) { - // when comparing quoted strings allow the quote to differ - if (other.type === 'Quoted' && !this.escaped && !other.escaped) { - return Node.numericCompare(this.value, other.value); - } else { - return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; - } -}; -module.exports = Quoted; - -},{"./node":76,"./property":79,"./variable":88}],81:[function(require,module,exports){ -var Node = require('./node'), - Declaration = require('./declaration'), - Keyword = require('./keyword'), - Comment = require('./comment'), - Paren = require('./paren'), - Selector = require('./selector'), - Element = require('./element'), - Anonymous = require('./anonymous'), - contexts = require('../contexts'), - globalFunctionRegistry = require('../functions/function-registry'), - defaultFunc = require('../functions/default'), - getDebugInfo = require('./debug-info'), - utils = require('../utils'); - -var Ruleset = function (selectors, rules, strictImports, visibilityInfo) { - this.selectors = selectors; - this.rules = rules; - this._lookups = {}; - this._variables = null; - this._properties = null; - this.strictImports = strictImports; - this.copyVisibilityInfo(visibilityInfo); - this.allowRoot = true; - - this.setParent(this.selectors, this); - this.setParent(this.rules, this); - -}; -Ruleset.prototype = new Node(); -Ruleset.prototype.type = 'Ruleset'; -Ruleset.prototype.isRuleset = true; -Ruleset.prototype.isRulesetLike = function() { return true; }; -Ruleset.prototype.accept = function (visitor) { - if (this.paths) { - this.paths = visitor.visitArray(this.paths, true); - } else if (this.selectors) { - this.selectors = visitor.visitArray(this.selectors); - } - if (this.rules && this.rules.length) { - this.rules = visitor.visitArray(this.rules); - } -}; -Ruleset.prototype.eval = function (context) { - var that = this, selectors, selCnt, selector, i, hasVariable, hasOnePassingSelector = false; - if (this.selectors && (selCnt = this.selectors.length)) { - selectors = new Array(selCnt); - defaultFunc.error({ - type: 'Syntax', - message: 'it is currently only allowed in parametric mixin guards,' - }); + argIndex = 0; - for (i = 0; i < selCnt; i++) { - selector = this.selectors[i].eval(context); - for (var j = 0; j < selector.elements.length; j++) { - if (selector.elements[j].isVariable) { - hasVariable = true; - break; - } + for (i = 0; i < params.length; i++) { + if (evaldArguments[i]) { + continue; + } + + arg = args && args[argIndex]; + + if (name = params[i].name) { + if (params[i].variadic) { + varargs = []; + + for (j = argIndex; j < argsLength; j++) { + varargs.push(args[j].value.eval(context)); + } + + frame.prependRule(new Declaration(name, new Expression(varargs).eval(context))); + } else { + val = arg && arg.value; + + if (val) { + // This was a mixin call, pass in a detached ruleset of it's eval'd rules + if (Array.isArray(val)) { + val = new DetachedRuleset(new Ruleset('', val)); + } else { + val = val.eval(context); + } + } else if (params[i].value) { + val = params[i].value.eval(mixinEnv); + frame.resetCache(); + } else { + throw { + type: 'Runtime', + message: "wrong number of arguments for ".concat(this.name, " (").concat(argsLength, " for ").concat(this.arity, ")") + }; + } + + frame.prependRule(new Declaration(name, val)); + evaldArguments[i] = val; } - selectors[i] = selector; - if (selector.evaldCondition) { - hasOnePassingSelector = true; + } + + if (params[i].variadic && args) { + for (j = argIndex; j < argsLength; j++) { + evaldArguments[j] = args[j].value.eval(context); } + } + + argIndex++; } - if (hasVariable) { - var toParseSelectors = new Array(selCnt); - for (i = 0; i < selCnt; i++) { - selector = selectors[i]; - toParseSelectors[i] = selector.toCSS(context); - } - this.parse.parseNode( - toParseSelectors.join(','), - ["selectors"], - selectors[0].getIndex(), - selectors[0].fileInfo(), - function(err, result) { - if (result) { - selectors = utils.flattenArray(result); - } - }); + return frame; + } + }, { + key: "makeImportant", + value: function makeImportant() { + var rules = !this.rules ? this.rules : this.rules.map(function (r) { + if (r.makeImportant) { + return r.makeImportant(true); + } else { + return r; + } + }); + var result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames); + return result; + } + }, { + key: "eval", + value: function _eval(context) { + return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || copyArray(context.frames)); + } + }, { + key: "evalCall", + value: function evalCall(context, args, important) { + var _arguments = []; + var mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames; + var frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments); + var rules; + var ruleset; + frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context))); + rules = copyArray(this.rules); + ruleset = new Ruleset(null, rules); + ruleset.originalRuleset = this; + ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames))); + + if (important) { + ruleset = ruleset.makeImportant(); + } + + return ruleset; + } + }, { + key: "matchCondition", + value: function matchCondition(args, context) { + if (this.condition && !this.condition.eval(new contexts.Eval(context, [this.evalParams(context, + /* the parameter variables */ + new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])].concat(this.frames || []) // the parent namespace/mixin frames + .concat(context.frames)))) { + // the current environment frames + return false; } - defaultFunc.reset(); - } else { - hasOnePassingSelector = true; - } + return true; + } + }, { + key: "matchArgs", + value: function matchArgs(args, context) { + var allArgsCnt = args && args.length || 0; + var len; + var optionalParameters = this.optionalParameters; + var requiredArgsCnt = !args ? 0 : args.reduce(function (count, p) { + if (optionalParameters.indexOf(p.name) < 0) { + return count + 1; + } else { + return count; + } + }, 0); - var rules = this.rules ? utils.copyArray(this.rules) : null, - ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo()), - rule, subRule; + if (!this.variadic) { + if (requiredArgsCnt < this.required) { + return false; + } - ruleset.originalRuleset = this; - ruleset.root = this.root; - ruleset.firstRoot = this.firstRoot; - ruleset.allowImports = this.allowImports; + if (allArgsCnt > this.params.length) { + return false; + } + } else { + if (requiredArgsCnt < this.required - 1) { + return false; + } + } // check patterns - if (this.debugInfo) { - ruleset.debugInfo = this.debugInfo; - } - if (!hasOnePassingSelector) { - rules.length = 0; - } + len = Math.min(requiredArgsCnt, this.arity); - // inherit a function registry from the frames stack when possible; - // otherwise from the global registry - ruleset.functionRegistry = (function (frames) { - var i = 0, - n = frames.length, - found; - for ( ; i !== n ; ++i ) { - found = frames[ i ].functionRegistry; - if ( found ) { return found; } + for (var i = 0; i < len; i++) { + if (!this.params[i].name && !this.params[i].variadic) { + if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) { + return false; + } + } } - return globalFunctionRegistry; - }(context.frames)).inherit(); - // push the current ruleset to the frames stack - var ctxFrames = context.frames; - ctxFrames.unshift(ruleset); + return true; + } + }]); - // currrent selectors - var ctxSelectors = context.selectors; - if (!ctxSelectors) { - context.selectors = ctxSelectors = []; - } - ctxSelectors.unshift(this.selectors); + return Definition; + }(Ruleset); - // Evaluate imports - if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) { - ruleset.evalImports(context); - } + Definition.prototype.type = 'MixinDefinition'; + Definition.prototype.evalFirst = true; - // Store the frames around mixin definitions, - // so they can be evaluated like closures when the time comes. - var rsRules = ruleset.rules; - for (i = 0; (rule = rsRules[i]); i++) { - if (rule.evalFirst) { - rsRules[i] = rule.eval(context); - } - } + var MixinCall = + /*#__PURE__*/ + function (_Node) { + _inherits(MixinCall, _Node); - var mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0; + function MixinCall(elements, args, index, currentFileInfo, important) { + var _this; - // Evaluate mixin calls. - for (i = 0; (rule = rsRules[i]); i++) { - if (rule.type === 'MixinCall') { - /* jshint loopfunc:true */ - rules = rule.eval(context).filter(function(r) { - if ((r instanceof Declaration) && r.variable) { - // do not pollute the scope if the variable is - // already there. consider returning false here - // but we need a way to "return" variable from mixins - return !(ruleset.variable(r.name)); - } - return true; - }); - rsRules.splice.apply(rsRules, [i, 1].concat(rules)); - i += rules.length - 1; - ruleset.resetCache(); - } else if (rule.type === 'VariableCall') { - /* jshint loopfunc:true */ - rules = rule.eval(context).rules.filter(function(r) { - if ((r instanceof Declaration) && r.variable) { - // do not pollute the scope at all - return false; - } - return true; - }); - rsRules.splice.apply(rsRules, [i, 1].concat(rules)); - i += rules.length - 1; - ruleset.resetCache(); - } - } + _classCallCheck(this, MixinCall); - // Evaluate everything else - for (i = 0; (rule = rsRules[i]); i++) { - if (!rule.evalFirst) { - rsRules[i] = rule = rule.eval ? rule.eval(context) : rule; - } - } + _this.selector = new Selector(elements); + _this.arguments = args || []; + _this._index = index; + _this._fileInfo = currentFileInfo; + _this.important = important; + _this.allowRoot = true; - // Evaluate everything else - for (i = 0; (rule = rsRules[i]); i++) { - // for rulesets, check if it is a css guard and can be removed - if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) { - // check if it can be folded in (e.g. & where) - if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) { - rsRules.splice(i--, 1); - - for (var j = 0; (subRule = rule.rules[j]); j++) { - if (subRule instanceof Node) { - subRule.copyVisibilityInfo(rule.visibilityInfo()); - if (!(subRule instanceof Declaration) || !subRule.variable) { - rsRules.splice(++i, 0, subRule); - } - } - } - } - } + _this.setParent(_this.selector, _assertThisInitialized(_this)); + + return _possibleConstructorReturn(_this); } - // Pop the stack - ctxFrames.shift(); - ctxSelectors.shift(); + _createClass(MixinCall, [{ + key: "accept", + value: function accept(visitor) { + if (this.selector) { + this.selector = visitor.visit(this.selector); + } - if (context.mediaBlocks) { - for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) { - context.mediaBlocks[i].bubbleSelectors(selectors); + if (this.arguments.length) { + this.arguments = visitor.visitArray(this.arguments); } - } + } + }, { + key: "eval", + value: function _eval(context) { + var mixins; + var mixin; + var mixinPath; + var args = []; + var arg; + var argValue; + var rules = []; + var match = false; + var i; + var m; + var f; + var isRecursive; + var isOneFound; + var candidates = []; + var candidate; + var conditionResult = []; + var defaultResult; + var defFalseEitherCase = -1; + var defNone = 0; + var defTrue = 1; + var defFalse = 2; + var count; + var originalRuleset; + var noArgumentsFilter; + this.selector = this.selector.eval(context); + + function calcDefGroup(mixin, mixinPath) { + var f; + var p; + var namespace; + + for (f = 0; f < 2; f++) { + conditionResult[f] = true; + defaultFunc$1.value(f); - return ruleset; -}; -Ruleset.prototype.evalImports = function(context) { - var rules = this.rules, i, importRules; - if (!rules) { return; } + for (p = 0; p < mixinPath.length && conditionResult[f]; p++) { + namespace = mixinPath[p]; - for (i = 0; i < rules.length; i++) { - if (rules[i].type === 'Import') { - importRules = rules[i].eval(context); - if (importRules && (importRules.length || importRules.length === 0)) { - rules.splice.apply(rules, [i, 1].concat(importRules)); - i += importRules.length - 1; - } else { - rules.splice(i, 1, importRules); + if (namespace.matchCondition) { + conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context); + } } - this.resetCache(); - } - } -}; -Ruleset.prototype.makeImportant = function() { - var result = new Ruleset(this.selectors, this.rules.map(function (r) { - if (r.makeImportant) { - return r.makeImportant(); - } else { - return r; - } - }), this.strictImports, this.visibilityInfo()); - return result; -}; -Ruleset.prototype.matchArgs = function (args) { - return !args || args.length === 0; -}; -// lets you call a css selector with a guard -Ruleset.prototype.matchCondition = function (args, context) { - var lastSelector = this.selectors[this.selectors.length - 1]; - if (!lastSelector.evaldCondition) { - return false; - } - if (lastSelector.condition && - !lastSelector.condition.eval( - new contexts.Eval(context, - context.frames))) { - return false; - } - return true; -}; -Ruleset.prototype.resetCache = function () { - this._rulesets = null; - this._variables = null; - this._properties = null; - this._lookups = {}; -}; -Ruleset.prototype.variables = function () { - if (!this._variables) { - this._variables = !this.rules ? {} : this.rules.reduce(function (hash, r) { - if (r instanceof Declaration && r.variable === true) { - hash[r.name] = r; + if (mixin.matchCondition) { + conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context); } - // when evaluating variables in an import statement, imports have not been eval'd - // so we need to go inside import statements. - // guard against root being a string (in the case of inlined less) - if (r.type === 'Import' && r.root && r.root.variables) { - var vars = r.root.variables(); - for (var name in vars) { - if (vars.hasOwnProperty(name)) { - hash[name] = r.root.variable(name); - } - } + } + + if (conditionResult[0] || conditionResult[1]) { + if (conditionResult[0] != conditionResult[1]) { + return conditionResult[1] ? defTrue : defFalse; } - return hash; - }, {}); - } - return this._variables; -}; -Ruleset.prototype.properties = function () { - if (!this._properties) { - this._properties = !this.rules ? {} : this.rules.reduce(function (hash, r) { - if (r instanceof Declaration && r.variable !== true) { - var name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ? - r.name[0].value : r.name; - // Properties don't overwrite as they can merge - if (!hash['$' + name]) { - hash['$' + name] = [ r ]; + + return defNone; + } + + return defFalseEitherCase; + } + + for (i = 0; i < this.arguments.length; i++) { + arg = this.arguments[i]; + argValue = arg.value.eval(context); + + if (arg.expand && Array.isArray(argValue.value)) { + argValue = argValue.value; + + for (m = 0; m < argValue.length; m++) { + args.push({ + value: argValue[m] + }); + } + } else { + args.push({ + name: arg.name, + value: argValue + }); + } + } + + noArgumentsFilter = function noArgumentsFilter(rule) { + return rule.matchArgs(null, context); + }; + + for (i = 0; i < context.frames.length; i++) { + if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) { + isOneFound = true; // To make `default()` function independent of definition order we have two "subpasses" here. + // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`), + // and build candidate list with corresponding flags. Then, when we know all possible matches, + // we make a final decision. + + for (m = 0; m < mixins.length; m++) { + mixin = mixins[m].rule; + mixinPath = mixins[m].path; + isRecursive = false; + + for (f = 0; f < context.frames.length; f++) { + if (!(mixin instanceof Definition) && mixin === (context.frames[f].originalRuleset || context.frames[f])) { + isRecursive = true; + break; } - else { - hash['$' + name].push(r); + } + + if (isRecursive) { + continue; + } + + if (mixin.matchArgs(args, context)) { + candidate = { + mixin: mixin, + group: calcDefGroup(mixin, mixinPath) + }; + + if (candidate.group !== defFalseEitherCase) { + candidates.push(candidate); } + + match = true; + } } - return hash; - }, {}); - } - return this._properties; -}; -Ruleset.prototype.variable = function (name) { - var decl = this.variables()[name]; - if (decl) { - return this.parseValue(decl); - } -}; -Ruleset.prototype.property = function (name) { - var decl = this.properties()[name]; - if (decl) { - return this.parseValue(decl); - } -}; -Ruleset.prototype.lastDeclaration = function () { - for (var i = this.rules.length; i > 0; i--) { - var decl = this.rules[i - 1]; - if (decl instanceof Declaration) { - return this.parseValue(decl); - } - } -}; -Ruleset.prototype.parseValue = function(toParse) { - var self = this; - function transformDeclaration(decl) { - if (decl.value instanceof Anonymous && !decl.parsed) { - if (typeof decl.value.value === 'string') { - this.parse.parseNode( - decl.value.value, - ['value', 'important'], - decl.value.getIndex(), - decl.fileInfo(), - function(err, result) { - if (err) { - decl.parsed = true; - } - if (result) { - decl.value = result[0]; - decl.important = result[1] || ''; - decl.parsed = true; - } - }); + + defaultFunc$1.reset(); + count = [0, 0, 0]; + + for (m = 0; m < candidates.length; m++) { + count[candidates[m].group]++; + } + + if (count[defNone] > 0) { + defaultResult = defFalse; } else { - decl.parsed = true; + defaultResult = defTrue; + + if (count[defTrue] + count[defFalse] > 1) { + throw { + type: 'Runtime', + message: "Ambiguous use of `default()` found when matching for `".concat(this.format(args), "`"), + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } } - return decl; + for (m = 0; m < candidates.length; m++) { + candidate = candidates[m].group; + + if (candidate === defNone || candidate === defaultResult) { + try { + mixin = candidates[m].mixin; + + if (!(mixin instanceof Definition)) { + originalRuleset = mixin.originalRuleset || mixin; + mixin = new Definition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo()); + mixin.originalRuleset = originalRuleset; + } + + var newRules = mixin.evalCall(context, args, this.important).rules; + + this._setVisibilityToReplacement(newRules); + + Array.prototype.push.apply(rules, newRules); + } catch (e) { + throw { + message: e.message, + index: this.getIndex(), + filename: this.fileInfo().filename, + stack: e.stack + }; + } + } + } + + if (match) { + return rules; + } + } } - else { - return decl; + + if (isOneFound) { + throw { + type: 'Runtime', + message: "No matching definition was found for `".concat(this.format(args), "`"), + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } else { + throw { + type: 'Name', + message: "".concat(this.selector.toCSS().trim(), " is undefined"), + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } + } + }, { + key: "_setVisibilityToReplacement", + value: function _setVisibilityToReplacement(replacement) { + var i; + var rule; + + if (this.blocksVisibility()) { + for (i = 0; i < replacement.length; i++) { + rule = replacement[i]; + rule.addVisibilityBlock(); + } + } + } + }, { + key: "format", + value: function format(args) { + return "".concat(this.selector.toCSS().trim(), "(").concat(args ? args.map(function (a) { + var argValue = ''; + + if (a.name) { + argValue += "".concat(a.name, ":"); + } + + if (a.value.toCSS) { + argValue += a.value.toCSS(); + } else { + argValue += '???'; + } + + return argValue; + }).join(', ') : '', ")"); + } + }]); + + return MixinCall; + }(Node); + + MixinCall.prototype.type = 'MixinCall'; + + var tree = { + Node: Node, + Color: Color, + AtRule: AtRule, + DetachedRuleset: DetachedRuleset, + Operation: Operation, + Dimension: Dimension, + Unit: Unit, + Keyword: Keyword, + Variable: Variable, + Property: Property, + Ruleset: Ruleset, + Element: Element, + Attribute: Attribute, + Combinator: Combinator, + Selector: Selector, + Quoted: Quoted, + Expression: Expression, + Declaration: Declaration, + Call: Call, + URL: URL, + Import: Import, + Comment: Comment, + Anonymous: Anonymous, + Value: Value, + JavaScript: JavaScript, + Assignment: Assignment, + Condition: Condition, + Paren: Paren, + Media: Media, + UnicodeDescriptor: UnicodeDescriptor, + Negative: Negative, + Extend: Extend, + VariableCall: VariableCall, + NamespaceValue: NamespaceValue, + mixin: { + Call: MixinCall, + Definition: Definition + } + }; + + var logger = { + error: function error(msg) { + this._fireEvent('error', msg); + }, + warn: function warn(msg) { + this._fireEvent('warn', msg); + }, + info: function info(msg) { + this._fireEvent('info', msg); + }, + debug: function debug(msg) { + this._fireEvent('debug', msg); + }, + addListener: function addListener(listener) { + this._listeners.push(listener); + }, + removeListener: function removeListener(listener) { + for (var i = 0; i < this._listeners.length; i++) { + if (this._listeners[i] === listener) { + this._listeners.splice(i, 1); + + return; + } + } + }, + _fireEvent: function _fireEvent(type, msg) { + for (var i = 0; i < this._listeners.length; i++) { + var logFunction = this._listeners[i][type]; + + if (logFunction) { + logFunction(msg); + } + } + }, + _listeners: [] + }; + + var environment = + /*#__PURE__*/ + function () { + function environment(externalEnvironment, fileManagers) { + _classCallCheck(this, environment); + + this.fileManagers = fileManagers || []; + externalEnvironment = externalEnvironment || {}; + var optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator']; + var requiredFunctions = []; + var functions = requiredFunctions.concat(optionalFunctions); + + for (var i = 0; i < functions.length; i++) { + var propName = functions[i]; + var environmentFunc = externalEnvironment[propName]; + + if (environmentFunc) { + this[propName] = environmentFunc.bind(externalEnvironment); + } else if (i < requiredFunctions.length) { + this.warn("missing required function in environment - ".concat(propName)); + } + } + } + + _createClass(environment, [{ + key: "getFileManager", + value: function getFileManager(filename, currentDirectory, options, environment, isSync) { + if (!filename) { + logger.warn('getFileManager called with no filename.. Please report this issue. continuing.'); + } + + if (currentDirectory == null) { + logger.warn('getFileManager called with null directory.. Please report this issue. continuing.'); + } + + var fileManagers = this.fileManagers; + + if (options.pluginManager) { + fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers()); + } + + for (var i = fileManagers.length - 1; i >= 0; i--) { + var fileManager = fileManagers[i]; + + if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) { + return fileManager; + } } + + return null; + } + }, { + key: "addFileManager", + value: function addFileManager(fileManager) { + this.fileManagers.push(fileManager); + } + }, { + key: "clearFileManagers", + value: function clearFileManagers() { + this.fileManagers = []; + } + }]); + + return environment; + }(); + + var abstractFileManager = function abstractFileManager() {}; + + abstractFileManager.prototype.getPath = function (filename) { + var j = filename.lastIndexOf('?'); + + if (j > 0) { + filename = filename.slice(0, j); } - if (!Array.isArray(toParse)) { - return transformDeclaration.call(self, toParse); + + j = filename.lastIndexOf('/'); + + if (j < 0) { + j = filename.lastIndexOf('\\'); } - else { - var nodes = []; - toParse.forEach(function(n) { - nodes.push(transformDeclaration.call(self, n)); - }); - return nodes; + + if (j < 0) { + return ''; } -}; -Ruleset.prototype.rulesets = function () { - if (!this.rules) { return []; } - var filtRules = [], rules = this.rules, - i, rule; + return filename.slice(0, j + 1); + }; - for (i = 0; (rule = rules[i]); i++) { - if (rule.isRuleset) { - filtRules.push(rule); - } + abstractFileManager.prototype.tryAppendExtension = function (path, ext) { + return /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + }; + + abstractFileManager.prototype.tryAppendLessExtension = function (path) { + return this.tryAppendExtension(path, '.less'); + }; + + abstractFileManager.prototype.supportsSync = function () { + return false; + }; + + abstractFileManager.prototype.alwaysMakePathsAbsolute = function () { + return false; + }; + + abstractFileManager.prototype.isPathAbsolute = function (filename) { + return /^(?:[a-z-]+:|\/|\\|#)/i.test(filename); + }; // TODO: pull out / replace? + + + abstractFileManager.prototype.join = function (basePath, laterPath) { + if (!basePath) { + return laterPath; } - return filtRules; -}; -Ruleset.prototype.prependRule = function (rule) { - var rules = this.rules; - if (rules) { - rules.unshift(rule); - } else { - this.rules = [ rule ]; + return basePath + laterPath; + }; + + abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { + // diff between two paths to create a relative path + var urlParts = this.extractUrlParts(url); + var baseUrlParts = this.extractUrlParts(baseUrl); + var i; + var max; + var urlDirectories; + var baseUrlDirectories; + var diff = ''; + + if (urlParts.hostPart !== baseUrlParts.hostPart) { + return ''; } - this.setParent(rule, this); -}; -Ruleset.prototype.find = function (selector, self, filter) { - self = self || this; - var rules = [], match, foundMixins, - key = selector.toCSS(); - if (key in this._lookups) { return this._lookups[key]; } + max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); - this.rulesets().forEach(function (rule) { - if (rule !== self) { - for (var j = 0; j < rule.selectors.length; j++) { - match = selector.match(rule.selectors[j]); - if (match) { - if (selector.elements.length > match) { - if (!filter || filter(rule)) { - foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter); - for (var i = 0; i < foundMixins.length; ++i) { - foundMixins[i].path.push(rule); - } - Array.prototype.push.apply(rules, foundMixins); - } - } else { - rules.push({ rule: rule, path: []}); - } - break; - } - } + for (i = 0; i < max; i++) { + if (baseUrlParts.directories[i] !== urlParts.directories[i]) { + break; + } + } + + baseUrlDirectories = baseUrlParts.directories.slice(i); + urlDirectories = urlParts.directories.slice(i); + + for (i = 0; i < baseUrlDirectories.length - 1; i++) { + diff += '../'; + } + + for (i = 0; i < urlDirectories.length - 1; i++) { + diff += "".concat(urlDirectories[i], "/"); + } + + return diff; + }; // helper function, not part of API + + + abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) { + // urlParts[1] = protocol://hostname/ OR / + // urlParts[2] = / if path relative to host base + // urlParts[3] = directories + // urlParts[4] = filename + // urlParts[5] = parameters + var urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; + var urlParts = url.match(urlPartsRegex); + var returner = {}; + var rawDirectories = []; + var directories = []; + var i; + var baseUrlParts; + + if (!urlParts) { + throw new Error("Could not parse sheet href - '".concat(url, "'")); + } // Stylesheets in IE don't always return the full path + + + if (baseUrl && (!urlParts[1] || urlParts[2])) { + baseUrlParts = baseUrl.match(urlPartsRegex); + + if (!baseUrlParts) { + throw new Error("Could not parse page url - '".concat(baseUrl, "'")); + } + + urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; + + if (!urlParts[2]) { + urlParts[3] = baseUrlParts[3] + urlParts[3]; + } + } + + if (urlParts[3]) { + rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); // collapse '..' and skip '.' + + for (i = 0; i < rawDirectories.length; i++) { + if (rawDirectories[i] === '..') { + directories.pop(); + } else if (rawDirectories[i] !== '.') { + directories.push(rawDirectories[i]); } - }); - this._lookups[key] = rules; - return rules; -}; -Ruleset.prototype.genCSS = function (context, output) { - var i, j, - charsetRuleNodes = [], - ruleNodes = [], - debugInfo, // Line number debugging - rule, - path; - - context.tabLevel = (context.tabLevel || 0); - - if (!this.root) { - context.tabLevel++; - } - - var tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' '), - tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' '), - sep; - - var charsetNodeIndex = 0; - var importNodeIndex = 0; - for (i = 0; (rule = this.rules[i]); i++) { - if (rule instanceof Comment) { - if (importNodeIndex === i) { - importNodeIndex++; + } + } + + returner.hostPart = urlParts[1]; + returner.directories = directories; + returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); + returner.path = (urlParts[1] || '') + directories.join('/'); + returner.filename = urlParts[4]; + returner.fileUrl = returner.path + (urlParts[4] || ''); + returner.url = returner.fileUrl + (urlParts[5] || ''); + return returner; + }; + + var AbstractPluginLoader = + /*#__PURE__*/ + function () { + function AbstractPluginLoader() { + _classCallCheck(this, AbstractPluginLoader); + + // Implemented by Node.js plugin loader + this.require = function () { + return null; + }; + } + + _createClass(AbstractPluginLoader, [{ + key: "evalPlugin", + value: function evalPlugin(contents, context, imports, pluginOptions, fileInfo) { + var loader; + var registry; + var pluginObj; + var localModule; + var pluginManager; + var filename; + var result; + pluginManager = context.pluginManager; + + if (fileInfo) { + if (typeof fileInfo === 'string') { + filename = fileInfo; + } else { + filename = fileInfo.filename; + } + } + + var shortname = new this.less.FileManager().extractUrlParts(filename).filename; + + if (filename) { + pluginObj = pluginManager.get(filename); + + if (pluginObj) { + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; } - ruleNodes.push(rule); - } else if (rule.isCharset && rule.isCharset()) { - ruleNodes.splice(charsetNodeIndex, 0, rule); - charsetNodeIndex++; - importNodeIndex++; - } else if (rule.type === 'Import') { - ruleNodes.splice(importNodeIndex, 0, rule); - importNodeIndex++; - } else { - ruleNodes.push(rule); + + try { + if (pluginObj.use) { + pluginObj.use.call(this.context, pluginObj); + } + } catch (e) { + e.message = e.message || 'Error during @plugin call'; + return new LessError(e, imports, filename); + } + + return pluginObj; + } + } + + localModule = { + exports: {}, + pluginManager: pluginManager, + fileInfo: fileInfo + }; + registry = functionRegistry.create(); + + var registerPlugin = function registerPlugin(obj) { + pluginObj = obj; + }; + + try { + loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents); + loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo); + } catch (e) { + return new LessError(e, imports, filename); + } + + if (!pluginObj) { + pluginObj = localModule.exports; + } + + pluginObj = this.validatePlugin(pluginObj, filename, shortname); + + if (pluginObj instanceof LessError) { + return pluginObj; + } + + if (pluginObj) { + pluginObj.imports = imports; + pluginObj.filename = filename; // For < 3.x (or unspecified minVersion) - setOptions() before install() + + if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) { + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; + } + } // Run on first load + + + pluginManager.addPlugin(pluginObj, fileInfo.filename, registry); + pluginObj.functions = registry.getLocalFunctions(); // Need to call setOptions again because the pluginObj might have functions + + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; + } // Run every @plugin call + + + try { + if (pluginObj.use) { + pluginObj.use.call(this.context, pluginObj); + } + } catch (e) { + e.message = e.message || 'Error during @plugin call'; + return new LessError(e, imports, filename); + } + } else { + return new LessError({ + message: 'Not a valid plugin' + }, imports, filename); + } + + return pluginObj; + } + }, { + key: "trySetOptions", + value: function trySetOptions(plugin, filename, name, options) { + if (options && !plugin.setOptions) { + return new LessError({ + message: "Options have been provided but the plugin ".concat(name, " does not support any options.") + }); + } + + try { + plugin.setOptions && plugin.setOptions(options); + } catch (e) { + return new LessError(e); + } + } + }, { + key: "validatePlugin", + value: function validatePlugin(plugin, filename, name) { + if (plugin) { + // support plugins being a function + // so that the plugin can be more usable programmatically + if (typeof plugin === 'function') { + plugin = new plugin(); + } + + if (plugin.minVersion) { + if (this.compareVersion(plugin.minVersion, this.less.version) < 0) { + return new LessError({ + message: "Plugin ".concat(name, " requires version ").concat(this.versionToString(plugin.minVersion)) + }); + } + } + + return plugin; + } + + return null; + } + }, { + key: "compareVersion", + value: function compareVersion(aVersion, bVersion) { + if (typeof aVersion === 'string') { + aVersion = aVersion.match(/^(\d+)\.?(\d+)?\.?(\d+)?/); + aVersion.shift(); + } + + for (var i = 0; i < aVersion.length; i++) { + if (aVersion[i] !== bVersion[i]) { + return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1; + } + } + + return 0; + } + }, { + key: "versionToString", + value: function versionToString(version) { + var versionString = ''; + + for (var i = 0; i < version.length; i++) { + versionString += (versionString ? '.' : '') + version[i]; + } + + return versionString; + } + }, { + key: "printUsage", + value: function printUsage(plugins) { + for (var i = 0; i < plugins.length; i++) { + var plugin = plugins[i]; + + if (plugin.printUsage) { + plugin.printUsage(); + } + } + } + }]); + + return AbstractPluginLoader; + }(); + + var _visitArgs = { + visitDeeper: true + }; + var _hasIndexed = false; + + function _noop(node) { + return node; + } + + function indexNodeTypes(parent, ticker) { + // add .typeIndex to tree node types for lookup table + var key; + var child; + + for (key in parent) { + /* eslint guard-for-in: 0 */ + child = parent[key]; + + switch (_typeof(child)) { + case 'function': + // ignore bound functions directly on tree which do not have a prototype + // or aren't nodes + if (child.prototype && child.prototype.type) { + child.prototype.typeIndex = ticker++; + } + + break; + + case 'object': + ticker = indexNodeTypes(child, ticker); + break; + } + } + + return ticker; + } + + var Visitor = + /*#__PURE__*/ + function () { + function Visitor(implementation) { + _classCallCheck(this, Visitor); + + this._implementation = implementation; + this._visitInCache = {}; + this._visitOutCache = {}; + + if (!_hasIndexed) { + indexNodeTypes(tree, 1); + _hasIndexed = true; + } + } + + _createClass(Visitor, [{ + key: "visit", + value: function visit(node) { + if (!node) { + return node; + } + + var nodeTypeIndex = node.typeIndex; + + if (!nodeTypeIndex) { + // MixinCall args aren't a node type? + if (node.value && node.value.typeIndex) { + this.visit(node.value); + } + + return node; + } + + var impl = this._implementation; + var func = this._visitInCache[nodeTypeIndex]; + var funcOut = this._visitOutCache[nodeTypeIndex]; + var visitArgs = _visitArgs; + var fnName; + visitArgs.visitDeeper = true; + + if (!func) { + fnName = "visit".concat(node.type); + func = impl[fnName] || _noop; + funcOut = impl["".concat(fnName, "Out")] || _noop; + this._visitInCache[nodeTypeIndex] = func; + this._visitOutCache[nodeTypeIndex] = funcOut; + } + + if (func !== _noop) { + var newNode = func.call(impl, node, visitArgs); + + if (node && impl.isReplacing) { + node = newNode; + } + } + + if (visitArgs.visitDeeper && node && node.accept) { + node.accept(this); + } + + if (funcOut != _noop) { + funcOut.call(impl, node); + } + + return node; + } + }, { + key: "visitArray", + value: function visitArray(nodes, nonReplacing) { + if (!nodes) { + return nodes; + } + + var cnt = nodes.length; + var i; // Non-replacing + + if (nonReplacing || !this._implementation.isReplacing) { + for (i = 0; i < cnt; i++) { + this.visit(nodes[i]); + } + + return nodes; + } // Replacing + + + var out = []; + + for (i = 0; i < cnt; i++) { + var evald = this.visit(nodes[i]); + + if (evald === undefined) { + continue; + } + + if (!evald.splice) { + out.push(evald); + } else if (evald.length) { + this.flatten(evald, out); + } + } + + return out; + } + }, { + key: "flatten", + value: function flatten(arr, out) { + if (!out) { + out = []; + } + + var cnt; + var i; + var item; + var nestedCnt; + var j; + var nestedItem; + + for (i = 0, cnt = arr.length; i < cnt; i++) { + item = arr[i]; + + if (item === undefined) { + continue; + } + + if (!item.splice) { + out.push(item); + continue; + } + + for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) { + nestedItem = item[j]; + + if (nestedItem === undefined) { + continue; + } + + if (!nestedItem.splice) { + out.push(nestedItem); + } else if (nestedItem.length) { + this.flatten(nestedItem, out); + } + } + } + + return out; + } + }]); + + return Visitor; + }(); + + var ImportSequencer = + /*#__PURE__*/ + function () { + function ImportSequencer(onSequencerEmpty) { + _classCallCheck(this, ImportSequencer); + + this.imports = []; + this.variableImports = []; + this._onSequencerEmpty = onSequencerEmpty; + this._currentDepth = 0; + } + + _createClass(ImportSequencer, [{ + key: "addImport", + value: function addImport(callback) { + var importSequencer = this; + var importItem = { + callback: callback, + args: null, + isReady: false + }; + this.imports.push(importItem); + return function () { + for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) { + args[_key] = arguments[_key]; + } + + importItem.args = Array.prototype.slice.call(args, 0); + importItem.isReady = true; + importSequencer.tryRun(); + }; + } + }, { + key: "addVariableImport", + value: function addVariableImport(callback) { + this.variableImports.push(callback); + } + }, { + key: "tryRun", + value: function tryRun() { + this._currentDepth++; + + try { + while (true) { + while (this.imports.length > 0) { + var importItem = this.imports[0]; + + if (!importItem.isReady) { + return; + } + + this.imports = this.imports.slice(1); + importItem.callback.apply(null, importItem.args); + } + + if (this.variableImports.length === 0) { + break; + } + + var variableImport = this.variableImports[0]; + this.variableImports = this.variableImports.slice(1); + variableImport(); + } + } finally { + this._currentDepth--; + } + + if (this._currentDepth === 0 && this._onSequencerEmpty) { + this._onSequencerEmpty(); + } + } + }]); + + return ImportSequencer; + }(); + + var ImportVisitor = function ImportVisitor(importer, finish) { + this._visitor = new Visitor(this); + this._importer = importer; + this._finish = finish; + this.context = new contexts.Eval(); + this.importCount = 0; + this.onceFileDetectionMap = {}; + this.recursionDetector = {}; + this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this)); + }; + + ImportVisitor.prototype = { + isReplacing: false, + run: function run(root) { + try { + // process the contents + this._visitor.visit(root); + } catch (e) { + this.error = e; + } + + this.isFinished = true; + + this._sequencer.tryRun(); + }, + _onSequencerEmpty: function _onSequencerEmpty() { + if (!this.isFinished) { + return; + } + + this._finish(this.error); + }, + visitImport: function visitImport(importNode, visitArgs) { + var inlineCSS = importNode.options.inline; + + if (!importNode.css || inlineCSS) { + var context = new contexts.Eval(this.context, copyArray(this.context.frames)); + var importParent = context.frames[0]; + this.importCount++; + + if (importNode.isVariableImport()) { + this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent)); + } else { + this.processImportNode(importNode, context, importParent); + } + } + + visitArgs.visitDeeper = false; + }, + processImportNode: function processImportNode(importNode, context, importParent) { + var evaldImportNode; + var inlineCSS = importNode.options.inline; + + try { + evaldImportNode = importNode.evalForImport(context); + } catch (e) { + if (!e.filename) { + e.index = importNode.getIndex(); + e.filename = importNode.fileInfo().filename; + } // attempt to eval properly and treat as css + + + importNode.css = true; // if that fails, this error will be thrown + + importNode.error = e; + } + + if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) { + if (evaldImportNode.options.multiple) { + context.importMultiple = true; + } // try appending if we haven't determined if it is css or not + + + var tryAppendLessExtension = evaldImportNode.css === undefined; + + for (var i = 0; i < importParent.rules.length; i++) { + if (importParent.rules[i] === importNode) { + importParent.rules[i] = evaldImportNode; + break; + } + } + + var onImported = this.onImported.bind(this, evaldImportNode, context); + + var sequencedOnImported = this._sequencer.addImport(onImported); + + this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(), evaldImportNode.options, sequencedOnImported); + } else { + this.importCount--; + + if (this.isFinished) { + this._sequencer.tryRun(); + } + } + }, + onImported: function onImported(importNode, context, e, root, importedAtRoot, fullPath) { + if (e) { + if (!e.filename) { + e.index = importNode.getIndex(); + e.filename = importNode.fileInfo().filename; + } + + this.error = e; + } + + var importVisitor = this; + var inlineCSS = importNode.options.inline; + var isPlugin = importNode.options.isPlugin; + var isOptional = importNode.options.optional; + var duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector; + + if (!context.importMultiple) { + if (duplicateImport) { + importNode.skip = true; + } else { + importNode.skip = function () { + if (fullPath in importVisitor.onceFileDetectionMap) { + return true; + } + + importVisitor.onceFileDetectionMap[fullPath] = true; + return false; + }; + } + } + + if (!fullPath && isOptional) { + importNode.skip = true; + } + + if (root) { + importNode.root = root; + importNode.importedFilename = fullPath; + + if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) { + importVisitor.recursionDetector[fullPath] = true; + var oldContext = this.context; + this.context = context; + + try { + this._visitor.visit(root); + } catch (e) { + this.error = e; + } + + this.context = oldContext; + } + } + + importVisitor.importCount--; + + if (importVisitor.isFinished) { + importVisitor._sequencer.tryRun(); + } + }, + visitDeclaration: function visitDeclaration(declNode, visitArgs) { + if (declNode.value.type === 'DetachedRuleset') { + this.context.frames.unshift(declNode); + } else { + visitArgs.visitDeeper = false; + } + }, + visitDeclarationOut: function visitDeclarationOut(declNode) { + if (declNode.value.type === 'DetachedRuleset') { + this.context.frames.shift(); + } + }, + visitAtRule: function visitAtRule(atRuleNode, visitArgs) { + this.context.frames.unshift(atRuleNode); + }, + visitAtRuleOut: function visitAtRuleOut(atRuleNode) { + this.context.frames.shift(); + }, + visitMixinDefinition: function visitMixinDefinition(mixinDefinitionNode, visitArgs) { + this.context.frames.unshift(mixinDefinitionNode); + }, + visitMixinDefinitionOut: function visitMixinDefinitionOut(mixinDefinitionNode) { + this.context.frames.shift(); + }, + visitRuleset: function visitRuleset(rulesetNode, visitArgs) { + this.context.frames.unshift(rulesetNode); + }, + visitRulesetOut: function visitRulesetOut(rulesetNode) { + this.context.frames.shift(); + }, + visitMedia: function visitMedia(mediaNode, visitArgs) { + this.context.frames.unshift(mediaNode.rules[0]); + }, + visitMediaOut: function visitMediaOut(mediaNode) { + this.context.frames.shift(); + } + }; + + var SetTreeVisibilityVisitor = + /*#__PURE__*/ + function () { + function SetTreeVisibilityVisitor(visible) { + _classCallCheck(this, SetTreeVisibilityVisitor); + + this.visible = visible; + } + + _createClass(SetTreeVisibilityVisitor, [{ + key: "run", + value: function run(root) { + this.visit(root); + } + }, { + key: "visitArray", + value: function visitArray(nodes) { + if (!nodes) { + return nodes; + } + + var cnt = nodes.length; + var i; + + for (i = 0; i < cnt; i++) { + this.visit(nodes[i]); + } + + return nodes; + } + }, { + key: "visit", + value: function visit(node) { + if (!node) { + return node; + } + + if (node.constructor === Array) { + return this.visitArray(node); + } + + if (!node.blocksVisibility || node.blocksVisibility()) { + return node; + } + + if (this.visible) { + node.ensureVisibility(); + } else { + node.ensureInvisibility(); + } + + node.accept(this); + return node; + } + }]); + + return SetTreeVisibilityVisitor; + }(); + + /* jshint loopfunc:true */ + + var ExtendFinderVisitor = + /*#__PURE__*/ + function () { + function ExtendFinderVisitor() { + _classCallCheck(this, ExtendFinderVisitor); + + this._visitor = new Visitor(this); + this.contexts = []; + this.allExtendsStack = [[]]; + } + + _createClass(ExtendFinderVisitor, [{ + key: "run", + value: function run(root) { + root = this._visitor.visit(root); + root.allExtends = this.allExtendsStack[0]; + return root; + } + }, { + key: "visitDeclaration", + value: function visitDeclaration(declNode, visitArgs) { + visitArgs.visitDeeper = false; + } + }, { + key: "visitMixinDefinition", + value: function visitMixinDefinition(mixinDefinitionNode, visitArgs) { + visitArgs.visitDeeper = false; + } + }, { + key: "visitRuleset", + value: function visitRuleset(rulesetNode, visitArgs) { + if (rulesetNode.root) { + return; + } + + var i; + var j; + var extend; + var allSelectorsExtendList = []; + var extendList; // get &:extend(.a); rules which apply to all selectors in this ruleset + + var rules = rulesetNode.rules; + var ruleCnt = rules ? rules.length : 0; + + for (i = 0; i < ruleCnt; i++) { + if (rulesetNode.rules[i] instanceof tree.Extend) { + allSelectorsExtendList.push(rules[i]); + rulesetNode.extendOnEveryPath = true; + } + } // now find every selector and apply the extends that apply to all extends + // and the ones which apply to an individual extend + + + var paths = rulesetNode.paths; + + for (i = 0; i < paths.length; i++) { + var selectorPath = paths[i]; + var selector = selectorPath[selectorPath.length - 1]; + var selExtendList = selector.extendList; + extendList = selExtendList ? copyArray(selExtendList).concat(allSelectorsExtendList) : allSelectorsExtendList; + + if (extendList) { + extendList = extendList.map(function (allSelectorsExtend) { + return allSelectorsExtend.clone(); + }); + } + + for (j = 0; j < extendList.length; j++) { + this.foundExtends = true; + extend = extendList[j]; + extend.findSelfSelectors(selectorPath); + extend.ruleset = rulesetNode; + + if (j === 0) { + extend.firstExtendOnThisSelectorPath = true; + } + + this.allExtendsStack[this.allExtendsStack.length - 1].push(extend); + } + } + + this.contexts.push(rulesetNode.selectors); + } + }, { + key: "visitRulesetOut", + value: function visitRulesetOut(rulesetNode) { + if (!rulesetNode.root) { + this.contexts.length = this.contexts.length - 1; + } + } + }, { + key: "visitMedia", + value: function visitMedia(mediaNode, visitArgs) { + mediaNode.allExtends = []; + this.allExtendsStack.push(mediaNode.allExtends); + } + }, { + key: "visitMediaOut", + value: function visitMediaOut(mediaNode) { + this.allExtendsStack.length = this.allExtendsStack.length - 1; + } + }, { + key: "visitAtRule", + value: function visitAtRule(atRuleNode, visitArgs) { + atRuleNode.allExtends = []; + this.allExtendsStack.push(atRuleNode.allExtends); + } + }, { + key: "visitAtRuleOut", + value: function visitAtRuleOut(atRuleNode) { + this.allExtendsStack.length = this.allExtendsStack.length - 1; + } + }]); + + return ExtendFinderVisitor; + }(); + + var ProcessExtendsVisitor = + /*#__PURE__*/ + function () { + function ProcessExtendsVisitor() { + _classCallCheck(this, ProcessExtendsVisitor); + + this._visitor = new Visitor(this); + } + + _createClass(ProcessExtendsVisitor, [{ + key: "run", + value: function run(root) { + var extendFinder = new ExtendFinderVisitor(); + this.extendIndices = {}; + extendFinder.run(root); + + if (!extendFinder.foundExtends) { + return root; + } + + root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends)); + this.allExtendsStack = [root.allExtends]; + + var newRoot = this._visitor.visit(root); + + this.checkExtendsForNonMatched(root.allExtends); + return newRoot; + } + }, { + key: "checkExtendsForNonMatched", + value: function checkExtendsForNonMatched(extendList) { + var indices = this.extendIndices; + extendList.filter(function (extend) { + return !extend.hasFoundMatches && extend.parent_ids.length == 1; + }).forEach(function (extend) { + var selector = '_unknown_'; + + try { + selector = extend.selector.toCSS({}); + } catch (_) {} + + if (!indices["".concat(extend.index, " ").concat(selector)]) { + indices["".concat(extend.index, " ").concat(selector)] = true; + logger.warn("extend '".concat(selector, "' has no matches")); + } + }); + } + }, { + key: "doExtendChaining", + value: function doExtendChaining(extendsList, extendsListTarget, iterationCount) { + // + // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering + // and pasting the selector we would do normally, but we are also adding an extend with the same target selector + // this means this new extend can then go and alter other extends + // + // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors + // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already + // processed if we look at each selector at a time, as is done in visitRuleset + var extendIndex; + var targetExtendIndex; + var matches; + var extendsToAdd = []; + var newSelector; + var extendVisitor = this; + var selectorPath; + var extend; + var targetExtend; + var newExtend; + iterationCount = iterationCount || 0; // loop through comparing every extend with every target extend. + // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place + // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one + // and the second is the target. + // the separation into two lists allows us to process a subset of chains with a bigger set, as is the + // case when processing media queries + + for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) { + for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) { + extend = extendsList[extendIndex]; + targetExtend = extendsListTarget[targetExtendIndex]; // look for circular references + + if (extend.parent_ids.indexOf(targetExtend.object_id) >= 0) { + continue; + } // find a match in the target extends self selector (the bit before :extend) + + + selectorPath = [targetExtend.selfSelectors[0]]; + matches = extendVisitor.findMatch(extend, selectorPath); + + if (matches.length) { + extend.hasFoundMatches = true; // we found a match, so for each self selector.. + + extend.selfSelectors.forEach(function (selfSelector) { + var info = targetExtend.visibilityInfo(); // process the extend as usual + + newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible()); // but now we create a new extend from it + + newExtend = new tree.Extend(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info); + newExtend.selfSelectors = newSelector; // add the extend onto the list of extends for that selector + + newSelector[newSelector.length - 1].extendList = [newExtend]; // record that we need to add it. + + extendsToAdd.push(newExtend); + newExtend.ruleset = targetExtend.ruleset; // remember its parents for circular references + + newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids); // only process the selector once.. if we have :extend(.a,.b) then multiple + // extends will look at the same selector path, so when extending + // we know that any others will be duplicates in terms of what is added to the css + + if (targetExtend.firstExtendOnThisSelectorPath) { + newExtend.firstExtendOnThisSelectorPath = true; + targetExtend.ruleset.paths.push(newSelector); + } + }); + } + } + } + + if (extendsToAdd.length) { + // try to detect circular references to stop a stack overflow. + // may no longer be needed. + this.extendChainCount++; + + if (iterationCount > 100) { + var selectorOne = '{unable to calculate}'; + var selectorTwo = '{unable to calculate}'; + + try { + selectorOne = extendsToAdd[0].selfSelectors[0].toCSS(); + selectorTwo = extendsToAdd[0].selector.toCSS(); + } catch (e) {} + + throw { + message: "extend circular reference detected. One of the circular extends is currently:".concat(selectorOne, ":extend(").concat(selectorTwo, ")") + }; + } // now process the new extends on the existing rules so that we can handle a extending b extending c extending + // d extending e... + + + return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1)); + } else { + return extendsToAdd; + } + } + }, { + key: "visitDeclaration", + value: function visitDeclaration(ruleNode, visitArgs) { + visitArgs.visitDeeper = false; + } + }, { + key: "visitMixinDefinition", + value: function visitMixinDefinition(mixinDefinitionNode, visitArgs) { + visitArgs.visitDeeper = false; + } + }, { + key: "visitSelector", + value: function visitSelector(selectorNode, visitArgs) { + visitArgs.visitDeeper = false; + } + }, { + key: "visitRuleset", + value: function visitRuleset(rulesetNode, visitArgs) { + if (rulesetNode.root) { + return; + } + + var matches; + var pathIndex; + var extendIndex; + var allExtends = this.allExtendsStack[this.allExtendsStack.length - 1]; + var selectorsToAdd = []; + var extendVisitor = this; + var selectorPath; // look at each selector path in the ruleset, find any extend matches and then copy, find and replace + + for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) { + for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) { + selectorPath = rulesetNode.paths[pathIndex]; // extending extends happens initially, before the main pass + + if (rulesetNode.extendOnEveryPath) { + continue; + } + + var extendList = selectorPath[selectorPath.length - 1].extendList; + + if (extendList && extendList.length) { + continue; + } + + matches = this.findMatch(allExtends[extendIndex], selectorPath); + + if (matches.length) { + allExtends[extendIndex].hasFoundMatches = true; + allExtends[extendIndex].selfSelectors.forEach(function (selfSelector) { + var extendedSelectors; + extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible()); + selectorsToAdd.push(extendedSelectors); + }); + } + } + } + + rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd); + } + }, { + key: "findMatch", + value: function findMatch(extend, haystackSelectorPath) { + // + // look through the haystack selector path to try and find the needle - extend.selector + // returns an array of selector matches that can then be replaced + // + var haystackSelectorIndex; + var hackstackSelector; + var hackstackElementIndex; + var haystackElement; + var targetCombinator; + var i; + var extendVisitor = this; + var needleElements = extend.selector.elements; + var potentialMatches = []; + var potentialMatch; + var matches = []; // loop through the haystack elements + + for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) { + hackstackSelector = haystackSelectorPath[haystackSelectorIndex]; + + for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) { + haystackElement = hackstackSelector.elements[hackstackElementIndex]; // if we allow elements before our match we can add a potential match every time. otherwise only at the first element. + + if (extend.allowBefore || haystackSelectorIndex === 0 && hackstackElementIndex === 0) { + potentialMatches.push({ + pathIndex: haystackSelectorIndex, + index: hackstackElementIndex, + matched: 0, + initialCombinator: haystackElement.combinator + }); + } + + for (i = 0; i < potentialMatches.length; i++) { + potentialMatch = potentialMatches[i]; // selectors add " " onto the first element. When we use & it joins the selectors together, but if we don't + // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to + // work out what the resulting combinator will be + + targetCombinator = haystackElement.combinator.value; + + if (targetCombinator === '' && hackstackElementIndex === 0) { + targetCombinator = ' '; + } // if we don't match, null our match to indicate failure + + + if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) || potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator) { + potentialMatch = null; + } else { + potentialMatch.matched++; + } // if we are still valid and have finished, test whether we have elements after and whether these are allowed + + + if (potentialMatch) { + potentialMatch.finished = potentialMatch.matched === needleElements.length; + + if (potentialMatch.finished && !extend.allowAfter && (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length)) { + potentialMatch = null; + } + } // if null we remove, if not, we are still valid, so either push as a valid match or continue + + + if (potentialMatch) { + if (potentialMatch.finished) { + potentialMatch.length = needleElements.length; + potentialMatch.endPathIndex = haystackSelectorIndex; + potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match + + potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again + + matches.push(potentialMatch); + } + } else { + potentialMatches.splice(i, 1); + i--; + } + } + } + } + + return matches; + } + }, { + key: "isElementValuesEqual", + value: function isElementValuesEqual(elementValue1, elementValue2) { + if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') { + return elementValue1 === elementValue2; + } + + if (elementValue1 instanceof tree.Attribute) { + if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) { + return false; + } + + if (!elementValue1.value || !elementValue2.value) { + if (elementValue1.value || elementValue2.value) { + return false; + } + + return true; + } + + elementValue1 = elementValue1.value.value || elementValue1.value; + elementValue2 = elementValue2.value.value || elementValue2.value; + return elementValue1 === elementValue2; + } + + elementValue1 = elementValue1.value; + elementValue2 = elementValue2.value; + + if (elementValue1 instanceof tree.Selector) { + if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) { + return false; + } + + for (var i = 0; i < elementValue1.elements.length; i++) { + if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) { + if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) { + return false; + } + } + + if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) { + return false; + } + } + + return true; + } + + return false; + } + }, { + key: "extendSelector", + value: function extendSelector(matches, selectorPath, replacementSelector, isVisible) { + // for a set of matches, replace each match with the replacement selector + var currentSelectorPathIndex = 0; + var currentSelectorPathElementIndex = 0; + var path = []; + var matchIndex; + var selector; + var firstElement; + var match; + var newElements; + + for (matchIndex = 0; matchIndex < matches.length; matchIndex++) { + match = matches[matchIndex]; + selector = selectorPath[match.pathIndex]; + firstElement = new tree.Element(match.initialCombinator, replacementSelector.elements[0].value, replacementSelector.elements[0].isVariable, replacementSelector.elements[0].getIndex(), replacementSelector.elements[0].fileInfo()); + + if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) { + path[path.length - 1].elements = path[path.length - 1].elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex)); + currentSelectorPathElementIndex = 0; + currentSelectorPathIndex++; + } + + newElements = selector.elements.slice(currentSelectorPathElementIndex, match.index).concat([firstElement]).concat(replacementSelector.elements.slice(1)); + + if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) { + path[path.length - 1].elements = path[path.length - 1].elements.concat(newElements); + } else { + path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex)); + path.push(new tree.Selector(newElements)); + } + + currentSelectorPathIndex = match.endPathIndex; + currentSelectorPathElementIndex = match.endPathElementIndex; + + if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) { + currentSelectorPathElementIndex = 0; + currentSelectorPathIndex++; + } + } + + if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) { + path[path.length - 1].elements = path[path.length - 1].elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex)); + currentSelectorPathIndex++; + } + + path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length)); + path = path.map(function (currentValue) { + // we can re-use elements here, because the visibility property matters only for selectors + var derived = currentValue.createDerived(currentValue.elements); + + if (isVisible) { + derived.ensureVisibility(); + } else { + derived.ensureInvisibility(); + } + + return derived; + }); + return path; + } + }, { + key: "visitMedia", + value: function visitMedia(mediaNode, visitArgs) { + var newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); + newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends)); + this.allExtendsStack.push(newAllExtends); + } + }, { + key: "visitMediaOut", + value: function visitMediaOut(mediaNode) { + var lastIndex = this.allExtendsStack.length - 1; + this.allExtendsStack.length = lastIndex; + } + }, { + key: "visitAtRule", + value: function visitAtRule(atRuleNode, visitArgs) { + var newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); + newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends)); + this.allExtendsStack.push(newAllExtends); + } + }, { + key: "visitAtRuleOut", + value: function visitAtRuleOut(atRuleNode) { + var lastIndex = this.allExtendsStack.length - 1; + this.allExtendsStack.length = lastIndex; + } + }]); + + return ProcessExtendsVisitor; + }(); + + var JoinSelectorVisitor = + /*#__PURE__*/ + function () { + function JoinSelectorVisitor() { + _classCallCheck(this, JoinSelectorVisitor); + + this.contexts = [[]]; + this._visitor = new Visitor(this); + } + + _createClass(JoinSelectorVisitor, [{ + key: "run", + value: function run(root) { + return this._visitor.visit(root); + } + }, { + key: "visitDeclaration", + value: function visitDeclaration(declNode, visitArgs) { + visitArgs.visitDeeper = false; + } + }, { + key: "visitMixinDefinition", + value: function visitMixinDefinition(mixinDefinitionNode, visitArgs) { + visitArgs.visitDeeper = false; + } + }, { + key: "visitRuleset", + value: function visitRuleset(rulesetNode, visitArgs) { + var context = this.contexts[this.contexts.length - 1]; + var paths = []; + var selectors; + this.contexts.push(paths); + + if (!rulesetNode.root) { + selectors = rulesetNode.selectors; + + if (selectors) { + selectors = selectors.filter(function (selector) { + return selector.getIsOutput(); + }); + rulesetNode.selectors = selectors.length ? selectors : selectors = null; + + if (selectors) { + rulesetNode.joinSelectors(paths, context, selectors); + } + } + + if (!selectors) { + rulesetNode.rules = null; + } + + rulesetNode.paths = paths; + } + } + }, { + key: "visitRulesetOut", + value: function visitRulesetOut(rulesetNode) { + this.contexts.length = this.contexts.length - 1; + } + }, { + key: "visitMedia", + value: function visitMedia(mediaNode, visitArgs) { + var context = this.contexts[this.contexts.length - 1]; + mediaNode.rules[0].root = context.length === 0 || context[0].multiMedia; + } + }, { + key: "visitAtRule", + value: function visitAtRule(atRuleNode, visitArgs) { + var context = this.contexts[this.contexts.length - 1]; + + if (atRuleNode.rules && atRuleNode.rules.length) { + atRuleNode.rules[0].root = atRuleNode.isRooted || context.length === 0 || null; + } + } + }]); + + return JoinSelectorVisitor; + }(); + + var CSSVisitorUtils = + /*#__PURE__*/ + function () { + function CSSVisitorUtils(context) { + _classCallCheck(this, CSSVisitorUtils); + + this._visitor = new Visitor(this); + this._context = context; + } + + _createClass(CSSVisitorUtils, [{ + key: "containsSilentNonBlockedChild", + value: function containsSilentNonBlockedChild(bodyRules) { + var rule; + + if (!bodyRules) { + return false; + } + + for (var r = 0; r < bodyRules.length; r++) { + rule = bodyRules[r]; + + if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) { + // the atrule contains something that was referenced (likely by extend) + // therefore it needs to be shown in output too + return true; + } + } + + return false; + } + }, { + key: "keepOnlyVisibleChilds", + value: function keepOnlyVisibleChilds(owner) { + if (owner && owner.rules) { + owner.rules = owner.rules.filter(function (thing) { + return thing.isVisible(); + }); + } + } + }, { + key: "isEmpty", + value: function isEmpty(owner) { + return owner && owner.rules ? owner.rules.length === 0 : true; + } + }, { + key: "hasVisibleSelector", + value: function hasVisibleSelector(rulesetNode) { + return rulesetNode && rulesetNode.paths ? rulesetNode.paths.length > 0 : false; + } + }, { + key: "resolveVisibility", + value: function resolveVisibility(node, originalRules) { + if (!node.blocksVisibility()) { + if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) { + return; + } + + return node; + } + + var compiledRulesBody = node.rules[0]; + this.keepOnlyVisibleChilds(compiledRulesBody); + + if (this.isEmpty(compiledRulesBody)) { + return; + } + + node.ensureVisibility(); + node.removeVisibilityBlock(); + return node; + } + }, { + key: "isVisibleRuleset", + value: function isVisibleRuleset(rulesetNode) { + if (rulesetNode.firstRoot) { + return true; + } + + if (this.isEmpty(rulesetNode)) { + return false; + } + + if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) { + return false; + } + + return true; + } + }]); + + return CSSVisitorUtils; + }(); + + var ToCSSVisitor = function ToCSSVisitor(context) { + this._visitor = new Visitor(this); + this._context = context; + this.utils = new CSSVisitorUtils(context); + }; + + ToCSSVisitor.prototype = { + isReplacing: true, + run: function run(root) { + return this._visitor.visit(root); + }, + visitDeclaration: function visitDeclaration(declNode, visitArgs) { + if (declNode.blocksVisibility() || declNode.variable) { + return; + } + + return declNode; + }, + visitMixinDefinition: function visitMixinDefinition(mixinNode, visitArgs) { + // mixin definitions do not get eval'd - this means they keep state + // so we have to clear that state here so it isn't used if toCSS is called twice + mixinNode.frames = []; + }, + visitExtend: function visitExtend(extendNode, visitArgs) {}, + visitComment: function visitComment(commentNode, visitArgs) { + if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) { + return; + } + + return commentNode; + }, + visitMedia: function visitMedia(mediaNode, visitArgs) { + var originalRules = mediaNode.rules[0].rules; + mediaNode.accept(this._visitor); + visitArgs.visitDeeper = false; + return this.utils.resolveVisibility(mediaNode, originalRules); + }, + visitImport: function visitImport(importNode, visitArgs) { + if (importNode.blocksVisibility()) { + return; + } + + return importNode; + }, + visitAtRule: function visitAtRule(atRuleNode, visitArgs) { + if (atRuleNode.rules && atRuleNode.rules.length) { + return this.visitAtRuleWithBody(atRuleNode, visitArgs); + } else { + return this.visitAtRuleWithoutBody(atRuleNode, visitArgs); + } + }, + visitAnonymous: function visitAnonymous(anonymousNode, visitArgs) { + if (!anonymousNode.blocksVisibility()) { + anonymousNode.accept(this._visitor); + return anonymousNode; + } + }, + visitAtRuleWithBody: function visitAtRuleWithBody(atRuleNode, visitArgs) { + // if there is only one nested ruleset and that one has no path, then it is + // just fake ruleset + function hasFakeRuleset(atRuleNode) { + var bodyRules = atRuleNode.rules; + return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0); + } + + function getBodyRules(atRuleNode) { + var nodeRules = atRuleNode.rules; + + if (hasFakeRuleset(atRuleNode)) { + return nodeRules[0].rules; + } + + return nodeRules; + } // it is still true that it is only one ruleset in array + // this is last such moment + // process childs + + + var originalRules = getBodyRules(atRuleNode); + atRuleNode.accept(this._visitor); + visitArgs.visitDeeper = false; + + if (!this.utils.isEmpty(atRuleNode)) { + this._mergeRules(atRuleNode.rules[0].rules); + } + + return this.utils.resolveVisibility(atRuleNode, originalRules); + }, + visitAtRuleWithoutBody: function visitAtRuleWithoutBody(atRuleNode, visitArgs) { + if (atRuleNode.blocksVisibility()) { + return; + } + + if (atRuleNode.name === '@charset') { + // Only output the debug info together with subsequent @charset definitions + // a comment (or @media statement) before the actual @charset atrule would + // be considered illegal css as it has to be on the first line + if (this.charset) { + if (atRuleNode.debugInfo) { + var comment = new tree.Comment("/* ".concat(atRuleNode.toCSS(this._context).replace(/\n/g, ''), " */\n")); + comment.debugInfo = atRuleNode.debugInfo; + return this._visitor.visit(comment); + } + + return; + } + + this.charset = true; + } + + return atRuleNode; + }, + checkValidNodes: function checkValidNodes(rules, isRoot) { + if (!rules) { + return; + } + + for (var i = 0; i < rules.length; i++) { + var ruleNode = rules[i]; + + if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) { + throw { + message: 'Properties must be inside selector blocks. They cannot be in the root', + index: ruleNode.getIndex(), + filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename + }; + } + + if (ruleNode instanceof tree.Call) { + throw { + message: "Function '".concat(ruleNode.name, "' is undefined"), + index: ruleNode.getIndex(), + filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename + }; + } + + if (ruleNode.type && !ruleNode.allowRoot) { + throw { + message: "".concat(ruleNode.type, " node returned by a function is not valid here"), + index: ruleNode.getIndex(), + filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename + }; + } + } + }, + visitRuleset: function visitRuleset(rulesetNode, visitArgs) { + // at this point rulesets are nested into each other + var rule; + var rulesets = []; + this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot); + + if (!rulesetNode.root) { + // remove invisible paths + this._compileRulesetPaths(rulesetNode); // remove rulesets from this ruleset body and compile them separately + + + var nodeRules = rulesetNode.rules; + var nodeRuleCnt = nodeRules ? nodeRules.length : 0; + + for (var i = 0; i < nodeRuleCnt;) { + rule = nodeRules[i]; + + if (rule && rule.rules) { + // visit because we are moving them out from being a child + rulesets.push(this._visitor.visit(rule)); + nodeRules.splice(i, 1); + nodeRuleCnt--; + continue; + } + + i++; + } // accept the visitor to remove rules and refactor itself + // then we can decide nogw whether we want it or not + // compile body + + + if (nodeRuleCnt > 0) { + rulesetNode.accept(this._visitor); + } else { + rulesetNode.rules = null; + } + + visitArgs.visitDeeper = false; + } else { + // if (! rulesetNode.root) { + rulesetNode.accept(this._visitor); + visitArgs.visitDeeper = false; + } + + if (rulesetNode.rules) { + this._mergeRules(rulesetNode.rules); + + this._removeDuplicateRules(rulesetNode.rules); + } // now decide whether we keep the ruleset + + + if (this.utils.isVisibleRuleset(rulesetNode)) { + rulesetNode.ensureVisibility(); + rulesets.splice(0, 0, rulesetNode); + } + + if (rulesets.length === 1) { + return rulesets[0]; + } + + return rulesets; + }, + _compileRulesetPaths: function _compileRulesetPaths(rulesetNode) { + if (rulesetNode.paths) { + rulesetNode.paths = rulesetNode.paths.filter(function (p) { + var i; + + if (p[0].elements[0].combinator.value === ' ') { + p[0].elements[0].combinator = new tree.Combinator(''); + } + + for (i = 0; i < p.length; i++) { + if (p[i].isVisible() && p[i].getIsOutput()) { + return true; + } + } + + return false; + }); + } + }, + _removeDuplicateRules: function _removeDuplicateRules(rules) { + if (!rules) { + return; + } // remove duplicates + + + var ruleCache = {}; + var ruleList; + var rule; + var i; + + for (i = rules.length - 1; i >= 0; i--) { + rule = rules[i]; + + if (rule instanceof tree.Declaration) { + if (!ruleCache[rule.name]) { + ruleCache[rule.name] = rule; + } else { + ruleList = ruleCache[rule.name]; + + if (ruleList instanceof tree.Declaration) { + ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)]; + } + + var ruleCSS = rule.toCSS(this._context); + + if (ruleList.indexOf(ruleCSS) !== -1) { + rules.splice(i, 1); + } else { + ruleList.push(ruleCSS); + } + } + } + } + }, + _mergeRules: function _mergeRules(rules) { + if (!rules) { + return; + } + + var groups = {}; + var groupsArr = []; + + for (var i = 0; i < rules.length; i++) { + var rule = rules[i]; + + if (rule.merge) { + var key = rule.name; + groups[key] ? rules.splice(i--, 1) : groupsArr.push(groups[key] = []); + groups[key].push(rule); + } + } + + groupsArr.forEach(function (group) { + if (group.length > 0) { + var result = group[0]; + var space = []; + var comma = [new tree.Expression(space)]; + group.forEach(function (rule) { + if (rule.merge === '+' && space.length > 0) { + comma.push(new tree.Expression(space = [])); + } + + space.push(rule.value); + result.important = result.important || rule.important; + }); + result.value = new tree.Value(comma); + } + }); + } + }; + + var visitors = { + Visitor: Visitor, + ImportVisitor: ImportVisitor, + MarkVisibleSelectorsVisitor: SetTreeVisibilityVisitor, + ExtendVisitor: ProcessExtendsVisitor, + JoinSelectorVisitor: JoinSelectorVisitor, + ToCSSVisitor: ToCSSVisitor + }; + + // Split the input into chunks. + var chunker = (function (input, fail) { + var len = input.length; + var level = 0; + var parenLevel = 0; + var lastOpening; + var lastOpeningParen; + var lastMultiComment; + var lastMultiCommentEndBrace; + var chunks = []; + var emitFrom = 0; + var chunkerCurrentIndex; + var currentChunkStartIndex; + var cc; + var cc2; + var matched; + + function emitChunk(force) { + var len = chunkerCurrentIndex - emitFrom; + + if (len < 512 && !force || !len) { + return; + } + + chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1)); + emitFrom = chunkerCurrentIndex + 1; + } + + for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) { + cc = input.charCodeAt(chunkerCurrentIndex); + + if (cc >= 97 && cc <= 122 || cc < 34) { + // a-z or whitespace + continue; + } + + switch (cc) { + case 40: + // ( + parenLevel++; + lastOpeningParen = chunkerCurrentIndex; + continue; + + case 41: + // ) + if (--parenLevel < 0) { + return fail('missing opening `(`', chunkerCurrentIndex); + } + + continue; + + case 59: + // ; + if (!parenLevel) { + emitChunk(); + } + + continue; + + case 123: + // { + level++; + lastOpening = chunkerCurrentIndex; + continue; + + case 125: + // } + if (--level < 0) { + return fail('missing opening `{`', chunkerCurrentIndex); + } + + if (!level && !parenLevel) { + emitChunk(); + } + + continue; + + case 92: + // \ + if (chunkerCurrentIndex < len - 1) { + chunkerCurrentIndex++; + continue; + } + + return fail('unescaped `\\`', chunkerCurrentIndex); + + case 34: + case 39: + case 96: + // ", ' and ` + matched = 0; + currentChunkStartIndex = chunkerCurrentIndex; + + for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) { + cc2 = input.charCodeAt(chunkerCurrentIndex); + + if (cc2 > 96) { + continue; + } + + if (cc2 == cc) { + matched = 1; + break; + } + + if (cc2 == 92) { + // \ + if (chunkerCurrentIndex == len - 1) { + return fail('unescaped `\\`', chunkerCurrentIndex); + } + + chunkerCurrentIndex++; + } + } + + if (matched) { + continue; + } + + return fail("unmatched `".concat(String.fromCharCode(cc), "`"), currentChunkStartIndex); + + case 47: + // /, check for comment + if (parenLevel || chunkerCurrentIndex == len - 1) { + continue; + } + + cc2 = input.charCodeAt(chunkerCurrentIndex + 1); + + if (cc2 == 47) { + // //, find lnfeed + for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) { + cc2 = input.charCodeAt(chunkerCurrentIndex); + + if (cc2 <= 13 && (cc2 == 10 || cc2 == 13)) { + break; + } + } + } else if (cc2 == 42) { + // /*, find */ + lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex; + + for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) { + cc2 = input.charCodeAt(chunkerCurrentIndex); + + if (cc2 == 125) { + lastMultiCommentEndBrace = chunkerCurrentIndex; + } + + if (cc2 != 42) { + continue; + } + + if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { + break; + } + } + + if (chunkerCurrentIndex == len - 1) { + return fail('missing closing `*/`', currentChunkStartIndex); + } + + chunkerCurrentIndex++; + } + + continue; + + case 42: + // *, check for unmatched */ + if (chunkerCurrentIndex < len - 1 && input.charCodeAt(chunkerCurrentIndex + 1) == 47) { + return fail('unmatched `/*`', chunkerCurrentIndex); + } + + continue; + } + } + + if (level !== 0) { + if (lastMultiComment > lastOpening && lastMultiCommentEndBrace > lastMultiComment) { + return fail('missing closing `}` or `*/`', lastOpening); + } else { + return fail('missing closing `}`', lastOpening); + } + } else if (parenLevel !== 0) { + return fail('missing closing `)`', lastOpeningParen); + } + + emitChunk(true); + return chunks; + }); + + var getParserInput = (function () { + var // Less input string + input; + var // current chunk + j; + var // holds state for backtracking + saveStack = []; + var // furthest index the parser has gone to + furthest; + var // if this is furthest we got to, this is the probably cause + furthestPossibleErrorMessage; + var // chunkified input + chunks; + var // current chunk + current; + var // index of current chunk, in `input` + currentPos; + var parserInput = {}; + var CHARCODE_SPACE = 32; + var CHARCODE_TAB = 9; + var CHARCODE_LF = 10; + var CHARCODE_CR = 13; + var CHARCODE_PLUS = 43; + var CHARCODE_COMMA = 44; + var CHARCODE_FORWARD_SLASH = 47; + var CHARCODE_9 = 57; + + function skipWhitespace(length) { + var oldi = parserInput.i; + var oldj = j; + var curr = parserInput.i - currentPos; + var endIndex = parserInput.i + current.length - curr; + var mem = parserInput.i += length; + var inp = input; + var c; + var nextChar; + var comment; + + for (; parserInput.i < endIndex; parserInput.i++) { + c = inp.charCodeAt(parserInput.i); + + if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) { + nextChar = inp.charAt(parserInput.i + 1); + + if (nextChar === '/') { + comment = { + index: parserInput.i, + isLineComment: true + }; + var nextNewLine = inp.indexOf('\n', parserInput.i + 2); + + if (nextNewLine < 0) { + nextNewLine = endIndex; + } + + parserInput.i = nextNewLine; + comment.text = inp.substr(comment.index, parserInput.i - comment.index); + parserInput.commentStore.push(comment); + continue; + } else if (nextChar === '*') { + var nextStarSlash = inp.indexOf('*/', parserInput.i + 2); + + if (nextStarSlash >= 0) { + comment = { + index: parserInput.i, + text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i), + isLineComment: false + }; + parserInput.i += comment.text.length - 1; + parserInput.commentStore.push(comment); + continue; + } + } + + break; + } + + if (c !== CHARCODE_SPACE && c !== CHARCODE_LF && c !== CHARCODE_TAB && c !== CHARCODE_CR) { + break; + } + } + + current = current.slice(length + parserInput.i - mem + curr); + currentPos = parserInput.i; + + if (!current.length) { + if (j < chunks.length - 1) { + current = chunks[++j]; + skipWhitespace(0); // skip space at the beginning of a chunk + + return true; // things changed + } + + parserInput.finished = true; + } + + return oldi !== parserInput.i || oldj !== j; + } + + parserInput.save = function () { + currentPos = parserInput.i; + saveStack.push({ + current: current, + i: parserInput.i, + j: j + }); + }; + + parserInput.restore = function (possibleErrorMessage) { + if (parserInput.i > furthest || parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage) { + furthest = parserInput.i; + furthestPossibleErrorMessage = possibleErrorMessage; + } + + var state = saveStack.pop(); + current = state.current; + currentPos = parserInput.i = state.i; + j = state.j; + }; + + parserInput.forget = function () { + saveStack.pop(); + }; + + parserInput.isWhitespace = function (offset) { + var pos = parserInput.i + (offset || 0); + var code = input.charCodeAt(pos); + return code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF; + }; // Specialization of $(tok) + + + parserInput.$re = function (tok) { + if (parserInput.i > currentPos) { + current = current.slice(parserInput.i - currentPos); + currentPos = parserInput.i; + } + + var m = tok.exec(current); + + if (!m) { + return null; + } + + skipWhitespace(m[0].length); + + if (typeof m === 'string') { + return m; + } + + return m.length === 1 ? m[0] : m; + }; + + parserInput.$char = function (tok) { + if (input.charAt(parserInput.i) !== tok) { + return null; + } + + skipWhitespace(1); + return tok; + }; + + parserInput.$str = function (tok) { + var tokLength = tok.length; // https://jsperf.com/string-startswith/21 + + for (var i = 0; i < tokLength; i++) { + if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { + return null; + } + } + + skipWhitespace(tokLength); + return tok; + }; + + parserInput.$quoted = function (loc) { + var pos = loc || parserInput.i; + var startChar = input.charAt(pos); + + if (startChar !== '\'' && startChar !== '"') { + return; + } + + var length = input.length; + var currentPosition = pos; + + for (var i = 1; i + currentPosition < length; i++) { + var nextChar = input.charAt(i + currentPosition); + + switch (nextChar) { + case '\\': + i++; + continue; + + case '\r': + case '\n': + break; + + case startChar: + var str = input.substr(currentPosition, i + 1); + + if (!loc && loc !== 0) { + skipWhitespace(i + 1); + return str; + } + + return [startChar, str]; + + default: + } + } + + return null; + }; + /** + * Permissive parsing. Ignores everything except matching {} [] () and quotes + * until matching token (outside of blocks) + */ + + + parserInput.$parseUntil = function (tok) { + var quote = ''; + var returnVal = null; + var inComment = false; + var blockDepth = 0; + var blockStack = []; + var parseGroups = []; + var length = input.length; + var startPos = parserInput.i; + var lastPos = parserInput.i; + var i = parserInput.i; + var loop = true; + var testChar; + + if (typeof tok === 'string') { + testChar = function testChar(_char) { + return _char === tok; + }; + } else { + testChar = function testChar(_char2) { + return tok.test(_char2); + }; + } + + do { + var nextChar = input.charAt(i); + + if (blockDepth === 0 && testChar(nextChar)) { + returnVal = input.substr(lastPos, i - lastPos); + + if (returnVal) { + parseGroups.push(returnVal); + } else { + parseGroups.push(' '); + } + + returnVal = parseGroups; + skipWhitespace(i - startPos); + loop = false; + } else { + if (inComment) { + if (nextChar === '*' && input.charAt(i + 1) === '/') { + i++; + blockDepth--; + inComment = false; + } + + i++; + continue; + } + + switch (nextChar) { + case '\\': + i++; + nextChar = input.charAt(i); + parseGroups.push(input.substr(lastPos, i - lastPos + 1)); + lastPos = i + 1; + break; + + case '/': + if (input.charAt(i + 1) === '*') { + i++; + inComment = true; + blockDepth++; + } + + break; + + case '\'': + case '"': + quote = parserInput.$quoted(i); + + if (quote) { + parseGroups.push(input.substr(lastPos, i - lastPos), quote); + i += quote[1].length - 1; + lastPos = i + 1; + } else { + skipWhitespace(i - startPos); + returnVal = nextChar; + loop = false; + } + + break; + + case '{': + blockStack.push('}'); + blockDepth++; + break; + + case '(': + blockStack.push(')'); + blockDepth++; + break; + + case '[': + blockStack.push(']'); + blockDepth++; + break; + + case '}': + case ')': + case ']': + var expected = blockStack.pop(); + + if (nextChar === expected) { + blockDepth--; + } else { + // move the parser to the error and return expected + skipWhitespace(i - startPos); + returnVal = expected; + loop = false; + } + + } + + i++; + + if (i > length) { + loop = false; + } + } + } while (loop); + + return returnVal ? returnVal : null; + }; + + parserInput.autoCommentAbsorb = true; + parserInput.commentStore = []; + parserInput.finished = false; // Same as $(), but don't change the state of the parser, + // just return the match. + + parserInput.peek = function (tok) { + if (typeof tok === 'string') { + // https://jsperf.com/string-startswith/21 + for (var i = 0; i < tok.length; i++) { + if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { + return false; + } + } + + return true; + } else { + return tok.test(current); + } + }; // Specialization of peek() + // TODO remove or change some currentChar calls to peekChar + + + parserInput.peekChar = function (tok) { + return input.charAt(parserInput.i) === tok; + }; + + parserInput.currentChar = function () { + return input.charAt(parserInput.i); + }; + + parserInput.prevChar = function () { + return input.charAt(parserInput.i - 1); + }; + + parserInput.getInput = function () { + return input; + }; + + parserInput.peekNotNumeric = function () { + var c = input.charCodeAt(parserInput.i); // Is the first char of the dimension 0-9, '.', '+' or '-' + + return c > CHARCODE_9 || c < CHARCODE_PLUS || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA; + }; + + parserInput.start = function (str, chunkInput, failFunction) { + input = str; + parserInput.i = j = currentPos = furthest = 0; // chunking apparently makes things quicker (but my tests indicate + // it might actually make things slower in node at least) + // and it is a non-perfect parse - it can't recognise + // unquoted urls, meaning it can't distinguish comments + // meaning comments with quotes or {}() in them get 'counted' + // and then lead to parse errors. + // In addition if the chunking chunks in the wrong place we might + // not be able to parse a parser statement in one go + // this is officially deprecated but can be switched on via an option + // in the case it causes too much performance issues. + + if (chunkInput) { + chunks = chunker(str, failFunction); + } else { + chunks = [str]; + } + + current = chunks[0]; + skipWhitespace(0); + }; + + parserInput.end = function () { + var message; + var isFinished = parserInput.i >= input.length; + + if (parserInput.i < furthest) { + message = furthestPossibleErrorMessage; + parserInput.i = furthest; + } + + return { + isFinished: isFinished, + furthest: parserInput.i, + furthestPossibleErrorMessage: message, + furthestReachedEnd: parserInput.i >= input.length - 1, + furthestChar: input[parserInput.i] + }; + }; + + return parserInput; + }); + + // less.js - parser + // + // A relatively straight-forward predictive parser. + // There is no tokenization/lexing stage, the input is parsed + // in one sweep. + // + // To make the parser fast enough to run in the browser, several + // optimization had to be made: + // + // - Matching and slicing on a huge input is often cause of slowdowns. + // The solution is to chunkify the input into smaller strings. + // The chunks are stored in the `chunks` var, + // `j` holds the current chunk index, and `currentPos` holds + // the index of the current chunk in relation to `input`. + // This gives us an almost 4x speed-up. + // + // - In many cases, we don't need to match individual tokens; + // for example, if a value doesn't hold any variables, operations + // or dynamic references, the parser can effectively 'skip' it, + // treating it as a literal. + // An example would be '1px solid #000' - which evaluates to itself, + // we don't need to know what the individual components are. + // The drawback, of course is that you don't get the benefits of + // syntax-checking on the CSS. This gives us a 50% speed-up in the parser, + // and a smaller speed-up in the code-gen. + // + // + // Token matching is done with the `$` function, which either takes + // a terminal string or regexp, or a non-terminal function to call. + // It also takes care of moving all the indices forwards. + // + + var Parser = function Parser(context, imports, fileInfo) { + var parsers; + var parserInput = getParserInput(); + + function error(msg, type) { + throw new LessError({ + index: parserInput.i, + filename: fileInfo.filename, + type: type || 'Syntax', + message: msg + }, imports); + } + + function expect(arg, msg) { + // some older browsers return typeof 'function' for RegExp + var result = arg instanceof Function ? arg.call(parsers) : parserInput.$re(arg); + + if (result) { + return result; + } + + error(msg || (typeof arg === 'string' ? "expected '".concat(arg, "' got '").concat(parserInput.currentChar(), "'") : 'unexpected token')); + } // Specialization of expect() + + + function expectChar(arg, msg) { + if (parserInput.$char(arg)) { + return arg; + } + + error(msg || "expected '".concat(arg, "' got '").concat(parserInput.currentChar(), "'")); + } + + function getDebugInfo(index) { + var filename = fileInfo.filename; + return { + lineNumber: getLocation(index, parserInput.getInput()).line + 1, + fileName: filename + }; + } + /** + * Used after initial parsing to create nodes on the fly + * + * @param {String} str - string to parse + * @param {Array} parseList - array of parsers to run input through e.g. ["value", "important"] + * @param {Number} currentIndex - start number to begin indexing + * @param {Object} fileInfo - fileInfo to attach to created nodes + */ + + + function parseNode(str, parseList, currentIndex, fileInfo, callback) { + var result; + var returnNodes = []; + var parser = parserInput; + + try { + parser.start(str, false, function fail(msg, index) { + callback({ + message: msg, + index: index + currentIndex + }); + }); + + for (var x = 0, p, i; p = parseList[x]; x++) { + i = parser.i; + result = parsers[p](); + + if (result) { + result._index = i + currentIndex; + result._fileInfo = fileInfo; + returnNodes.push(result); + } else { + returnNodes.push(null); + } + } + + var endInfo = parser.end(); + + if (endInfo.isFinished) { + callback(null, returnNodes); + } else { + callback(true, null); + } + } catch (e) { + throw new LessError({ + index: e.index + currentIndex, + message: e.message + }, imports, fileInfo.filename); + } + } // + // The Parser + // + + + return { + parserInput: parserInput, + imports: imports, + fileInfo: fileInfo, + parseNode: parseNode, + // + // Parse an input string into an abstract syntax tree, + // @param str A string containing 'less' markup + // @param callback call `callback` when done. + // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply + // + parse: function parse(str, callback, additionalData) { + var root; + var error = null; + var globalVars; + var modifyVars; + var ignored; + var preText = ''; + globalVars = additionalData && additionalData.globalVars ? "".concat(Parser.serializeVars(additionalData.globalVars), "\n") : ''; + modifyVars = additionalData && additionalData.modifyVars ? "\n".concat(Parser.serializeVars(additionalData.modifyVars)) : ''; + + if (context.pluginManager) { + var preProcessors = context.pluginManager.getPreProcessors(); + + for (var i = 0; i < preProcessors.length; i++) { + str = preProcessors[i].process(str, { + context: context, + imports: imports, + fileInfo: fileInfo + }); + } + } + + if (globalVars || additionalData && additionalData.banner) { + preText = (additionalData && additionalData.banner ? additionalData.banner : '') + globalVars; + ignored = imports.contentsIgnoredChars; + ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0; + ignored[fileInfo.filename] += preText.length; + } + + str = str.replace(/\r\n?/g, '\n'); // Remove potential UTF Byte Order Mark + + str = preText + str.replace(/^\uFEFF/, '') + modifyVars; + imports.contents[fileInfo.filename] = str; // Start with the primary rule. + // The whole syntax tree is held under a Ruleset node, + // with the `root` property set to true, so no `{}` are + // output. The callback is called when the input is parsed. + + try { + parserInput.start(str, context.chunkInput, function fail(msg, index) { + throw new LessError({ + index: index, + type: 'Parse', + message: msg, + filename: fileInfo.filename + }, imports); + }); + tree.Node.prototype.parse = this; + root = new tree.Ruleset(null, this.parsers.primary()); + tree.Node.prototype.rootNode = root; + root.root = true; + root.firstRoot = true; + root.functionRegistry = functionRegistry.inherit(); + } catch (e) { + return callback(new LessError(e, imports, fileInfo.filename)); + } // If `i` is smaller than the `input.length - 1`, + // it means the parser wasn't able to parse the whole + // string, so we've got a parsing error. + // + // We try to extract a \n delimited string, + // showing the line where the parse error occurred. + // We split it up into two parts (the part which parsed, + // and the part which didn't), so we can color them differently. + + + var endInfo = parserInput.end(); + + if (!endInfo.isFinished) { + var message = endInfo.furthestPossibleErrorMessage; + + if (!message) { + message = 'Unrecognised input'; + + if (endInfo.furthestChar === '}') { + message += '. Possibly missing opening \'{\''; + } else if (endInfo.furthestChar === ')') { + message += '. Possibly missing opening \'(\''; + } else if (endInfo.furthestReachedEnd) { + message += '. Possibly missing something'; + } + } + + error = new LessError({ + type: 'Parse', + message: message, + index: endInfo.furthest, + filename: fileInfo.filename + }, imports); + } + + var finish = function finish(e) { + e = error || e || imports.error; + + if (e) { + if (!(e instanceof LessError)) { + e = new LessError(e, imports, fileInfo.filename); + } + + return callback(e); + } else { + return callback(null, root); + } + }; + + if (context.processImports !== false) { + new visitors.ImportVisitor(imports, finish).run(root); + } else { + return finish(); + } + }, + // + // Here in, the parsing rules/functions + // + // The basic structure of the syntax tree generated is as follows: + // + // Ruleset -> Declaration -> Value -> Expression -> Entity + // + // Here's some Less code: + // + // .class { + // color: #fff; + // border: 1px solid #000; + // width: @w + 4px; + // > .child {...} + // } + // + // And here's what the parse tree might look like: + // + // Ruleset (Selector '.class', [ + // Declaration ("color", Value ([Expression [Color #fff]])) + // Declaration ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]])) + // Declaration ("width", Value ([Expression [Operation " + " [Variable "@w"][Dimension 4px]]])) + // Ruleset (Selector [Element '>', '.child'], [...]) + // ]) + // + // In general, most rules will try to parse a token with the `$re()` function, and if the return + // value is truly, will return a new node, of the relevant type. Sometimes, we need to check + // first, before parsing, that's when we use `peek()`. + // + parsers: parsers = { + // + // The `primary` rule is the *entry* and *exit* point of the parser. + // The rules here can appear at any level of the parse tree. + // + // The recursive nature of the grammar is an interplay between the `block` + // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule, + // as represented by this simplified grammar: + // + // primary → (ruleset | declaration)+ + // ruleset → selector+ block + // block → '{' primary '}' + // + // Only at one point is the primary rule not called from the + // block rule: at the root level. + // + primary: function primary() { + var mixin = this.mixin; + var root = []; + var node; + + while (true) { + while (true) { + node = this.comment(); + + if (!node) { + break; + } + + root.push(node); + } // always process comments before deciding if finished + + + if (parserInput.finished) { + break; + } + + if (parserInput.peek('}')) { + break; + } + + node = this.extendRule(); + + if (node) { + root = root.concat(node); + continue; + } + + node = mixin.definition() || this.declaration() || this.ruleset() || mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule(); + + if (node) { + root.push(node); + } else { + var foundSemiColon = false; + + while (parserInput.$char(';')) { + foundSemiColon = true; + } + + if (!foundSemiColon) { + break; + } + } + } + + return root; + }, + // comments are collected by the main parsing mechanism and then assigned to nodes + // where the current structure allows it + comment: function comment() { + if (parserInput.commentStore.length) { + var comment = parserInput.commentStore.shift(); + return new tree.Comment(comment.text, comment.isLineComment, comment.index, fileInfo); + } + }, + // + // Entities are tokens which can be found inside an Expression + // + entities: { + mixinLookup: function mixinLookup() { + return parsers.mixin.call(true, true); + }, + // + // A string, which supports escaping " and ' + // + // "milky way" 'he\'s the one!' + // + quoted: function quoted(forceEscaped) { + var str; + var index = parserInput.i; + var isEscaped = false; + parserInput.save(); + + if (parserInput.$char('~')) { + isEscaped = true; + } else if (forceEscaped) { + parserInput.restore(); + return; + } + + str = parserInput.$quoted(); + + if (!str) { + parserInput.restore(); + return; + } + + parserInput.forget(); + return new tree.Quoted(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo); + }, + // + // A catch-all word, such as: + // + // black border-collapse + // + keyword: function keyword() { + var k = parserInput.$char('%') || parserInput.$re(/^\[?(?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\]?/); + + if (k) { + return tree.Color.fromKeyword(k) || new tree.Keyword(k); + } + }, + // + // A function call + // + // rgb(255, 0, 255) + // + // The arguments are parsed with the `entities.arguments` parser. + // + call: function call() { + var name; + var args; + var func; + var index = parserInput.i; // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 + + if (parserInput.peek(/^url\(/i)) { + return; + } + + parserInput.save(); + name = parserInput.$re(/^([\w-]+|%|progid:[\w\.]+)\(/); + + if (!name) { + parserInput.forget(); + return; + } + + name = name[1]; + func = this.customFuncCall(name); + + if (func) { + args = func.parse(); + + if (args && func.stop) { + parserInput.forget(); + return args; + } + } + + args = this.arguments(args); + + if (!parserInput.$char(')')) { + parserInput.restore('Could not parse call arguments or missing \')\''); + return; + } + + parserInput.forget(); + return new tree.Call(name, args, index, fileInfo); + }, + // + // Parsing rules for functions with non-standard args, e.g.: + // + // boolean(not(2 > 1)) + // + // This is a quick prototype, to be modified/improved when + // more custom-parsed funcs come (e.g. `selector(...)`) + // + customFuncCall: function customFuncCall(name) { + /* Ideally the table is to be moved out of here for faster perf., + but it's quite tricky since it relies on all these `parsers` + and `expect` available only here */ + return { + alpha: f(parsers.ieAlpha, true), + "boolean": f(condition), + 'if': f(condition) + }[name.toLowerCase()]; + + function f(parse, stop) { + return { + parse: parse, + // parsing function + stop: stop // when true - stop after parse() and return its result, + // otherwise continue for plain args + + }; + } + + function condition() { + return [expect(parsers.condition, 'expected condition')]; + } + }, + arguments: function _arguments(prevArgs) { + var argsComma = prevArgs || []; + var argsSemiColon = []; + var isSemiColonSeparated; + var value; + parserInput.save(); + + while (true) { + if (prevArgs) { + prevArgs = false; + } else { + value = parsers.detachedRuleset() || this.assignment() || parsers.expression(); + + if (!value) { + break; + } + + if (value.value && value.value.length == 1) { + value = value.value[0]; + } + + argsComma.push(value); + } + + if (parserInput.$char(',')) { + continue; + } + + if (parserInput.$char(';') || isSemiColonSeparated) { + isSemiColonSeparated = true; + value = argsComma.length < 1 ? argsComma[0] : new tree.Value(argsComma); + argsSemiColon.push(value); + argsComma = []; + } + } + + parserInput.forget(); + return isSemiColonSeparated ? argsSemiColon : argsComma; + }, + literal: function literal() { + return this.dimension() || this.color() || this.quoted() || this.unicodeDescriptor(); + }, + // Assignments are argument entities for calls. + // They are present in ie filter properties as shown below. + // + // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* ) + // + assignment: function assignment() { + var key; + var value; + parserInput.save(); + key = parserInput.$re(/^\w+(?=\s?=)/i); + + if (!key) { + parserInput.restore(); + return; + } + + if (!parserInput.$char('=')) { + parserInput.restore(); + return; + } + + value = parsers.entity(); + + if (value) { + parserInput.forget(); + return new tree.Assignment(key, value); + } else { + parserInput.restore(); + } + }, + // + // Parse url() tokens + // + // We use a specific rule for urls, because they don't really behave like + // standard function calls. The difference is that the argument doesn't have + // to be enclosed within a string, so it can't be parsed as an Expression. + // + url: function url() { + var value; + var index = parserInput.i; + parserInput.autoCommentAbsorb = false; + + if (!parserInput.$str('url(')) { + parserInput.autoCommentAbsorb = true; + return; + } + + value = this.quoted() || this.variable() || this.property() || parserInput.$re(/^(?:(?:\\[\(\)'"])|[^\(\)'"])+/) || ''; + parserInput.autoCommentAbsorb = true; + expectChar(')'); + return new tree.URL(value.value != null || value instanceof tree.Variable || value instanceof tree.Property ? value : new tree.Anonymous(value, index), index, fileInfo); + }, + // + // A Variable entity, such as `@fink`, in + // + // width: @fink + 2px + // + // We use a different parser for variable definitions, + // see `parsers.variable`. + // + variable: function variable() { + var ch; + var name; + var index = parserInput.i; + parserInput.save(); + + if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\w-]+/))) { + ch = parserInput.currentChar(); + + if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\s/)) { + // this may be a VariableCall lookup + var result = parsers.variableCall(name); + + if (result) { + parserInput.forget(); + return result; + } + } + + parserInput.forget(); + return new tree.Variable(name, index, fileInfo); + } + + parserInput.restore(); + }, + // A variable entity using the protective {} e.g. @{var} + variableCurly: function variableCurly() { + var curly; + var index = parserInput.i; + + if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\{([\w-]+)\}/))) { + return new tree.Variable("@".concat(curly[1]), index, fileInfo); + } + }, + // + // A Property accessor, such as `$color`, in + // + // background-color: $color + // + property: function property() { + var name; + var index = parserInput.i; + + if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\$[\w-]+/))) { + return new tree.Property(name, index, fileInfo); + } + }, + // A property entity useing the protective {} e.g. ${prop} + propertyCurly: function propertyCurly() { + var curly; + var index = parserInput.i; + + if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\$\{([\w-]+)\}/))) { + return new tree.Property("$".concat(curly[1]), index, fileInfo); + } + }, + // + // A Hexadecimal color + // + // #4F3C2F + // + // `rgb` and `hsl` colors are parsed through the `entities.call` parser. + // + color: function color() { + var rgb; + parserInput.save(); + + if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\w.#\[])?/))) { + if (!rgb[2]) { + parserInput.forget(); + return new tree.Color(rgb[1], undefined, rgb[0]); + } + } + + parserInput.restore(); + }, + colorKeyword: function colorKeyword() { + parserInput.save(); + var autoCommentAbsorb = parserInput.autoCommentAbsorb; + parserInput.autoCommentAbsorb = false; + var k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/); + parserInput.autoCommentAbsorb = autoCommentAbsorb; + + if (!k) { + parserInput.forget(); + return; + } + + parserInput.restore(); + var color = tree.Color.fromKeyword(k); + + if (color) { + parserInput.$str(k); + return color; + } + }, + // + // A Dimension, that is, a number and a unit + // + // 0.5em 95% + // + dimension: function dimension() { + if (parserInput.peekNotNumeric()) { + return; + } + + var value = parserInput.$re(/^([+-]?\d*\.?\d+)(%|[a-z_]+)?/i); + + if (value) { + return new tree.Dimension(value[1], value[2]); + } + }, + // + // A unicode descriptor, as is used in unicode-range + // + // U+0?? or U+00A1-00A9 + // + unicodeDescriptor: function unicodeDescriptor() { + var ud; + ud = parserInput.$re(/^U\+[0-9a-fA-F?]+(\-[0-9a-fA-F?]+)?/); + + if (ud) { + return new tree.UnicodeDescriptor(ud[0]); + } + }, + // + // JavaScript code to be evaluated + // + // `window.location.href` + // + javascript: function javascript() { + var js; + var index = parserInput.i; + parserInput.save(); + var escape = parserInput.$char('~'); + var jsQuote = parserInput.$char('`'); + + if (!jsQuote) { + parserInput.restore(); + return; + } + + js = parserInput.$re(/^[^`]*`/); + + if (js) { + parserInput.forget(); + return new tree.JavaScript(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo); + } + + parserInput.restore('invalid javascript definition'); + } + }, + // + // The variable part of a variable definition. Used in the `rule` parser + // + // @fink: + // + variable: function variable() { + var name; + + if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\w-]+)\s*:/))) { + return name[1]; + } + }, + // + // Call a variable value to retrieve a detached ruleset + // or a value from a detached ruleset's rules. + // + // @fink(); + // @fink; + // color: @fink[@color]; + // + variableCall: function variableCall(parsedName) { + var lookups; + var important; + var i = parserInput.i; + var inValue = !!parsedName; + var name = parsedName; + parserInput.save(); + + if (name || parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\w-]+)(\(\s*\))?/))) { + lookups = this.mixin.ruleLookups(); + + if (!lookups && (inValue && parserInput.$str('()') !== '()' || name[2] !== '()')) { + parserInput.restore('Missing \'[...]\' lookup in variable call'); + return; + } + + if (!inValue) { + name = name[1]; + } + + if (lookups && parsers.important()) { + important = true; + } + + var call = new tree.VariableCall(name, i, fileInfo); + + if (!inValue && parsers.end()) { + parserInput.forget(); + return call; + } else { + parserInput.forget(); + return new tree.NamespaceValue(call, lookups, important, i, fileInfo); + } + } + + parserInput.restore(); + }, + // + // extend syntax - used to extend selectors + // + extend: function extend(isRule) { + var elements; + var e; + var index = parserInput.i; + var option; + var extendList; + var extend; + + if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) { + return; + } + + do { + option = null; + elements = null; + + while (!(option = parserInput.$re(/^(all)(?=\s*(\)|,))/))) { + e = this.element(); + + if (!e) { + break; + } + + if (elements) { + elements.push(e); + } else { + elements = [e]; + } + } + + option = option && option[1]; + + if (!elements) { + error('Missing target selector for :extend().'); + } + + extend = new tree.Extend(new tree.Selector(elements), option, index, fileInfo); + + if (extendList) { + extendList.push(extend); + } else { + extendList = [extend]; + } + } while (parserInput.$char(',')); + + expect(/^\)/); + + if (isRule) { + expect(/^;/); + } + + return extendList; + }, + // + // extendRule - used in a rule to extend all the parent selectors + // + extendRule: function extendRule() { + return this.extend(true); + }, + // + // Mixins + // + mixin: { + // + // A Mixin call, with an optional argument list + // + // #mixins > .square(#fff); + // #mixins.square(#fff); + // .rounded(4px, black); + // .button; + // + // We can lookup / return a value using the lookup syntax: + // + // color: #mixin.square(#fff)[@color]; + // + // The `while` loop is there because mixins can be + // namespaced, but we only support the child and descendant + // selector for now. + // + call: function call(inValue, getLookup) { + var s = parserInput.currentChar(); + var important = false; + var lookups; + var index = parserInput.i; + var elements; + var args; + var hasParens; + + if (s !== '.' && s !== '#') { + return; + } + + parserInput.save(); // stop us absorbing part of an invalid selector + + elements = this.elements(); + + if (elements) { + if (parserInput.$char('(')) { + args = this.args(true).args; + expectChar(')'); + hasParens = true; + } + + if (getLookup !== false) { + lookups = this.ruleLookups(); + } + + if (getLookup === true && !lookups) { + parserInput.restore(); + return; + } + + if (inValue && !lookups && !hasParens) { + // This isn't a valid in-value mixin call + parserInput.restore(); + return; + } + + if (!inValue && parsers.important()) { + important = true; + } + + if (inValue || parsers.end()) { + parserInput.forget(); + var mixin = new tree.mixin.Call(elements, args, index, fileInfo, !lookups && important); + + if (lookups) { + return new tree.NamespaceValue(mixin, lookups, important); + } else { + return mixin; + } + } + } + + parserInput.restore(); + }, + + /** + * Matching elements for mixins + * (Start with . or # and can have > ) + */ + elements: function elements() { + var elements; + var e; + var c; + var elem; + var elemIndex; + var re = /^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/; + + while (true) { + elemIndex = parserInput.i; + e = parserInput.$re(re); + + if (!e) { + break; + } + + elem = new tree.Element(c, e, false, elemIndex, fileInfo); + + if (elements) { + elements.push(elem); + } else { + elements = [elem]; + } + + c = parserInput.$char('>'); + } + + return elements; + }, + args: function args(isCall) { + var entities = parsers.entities; + var returner = { + args: null, + variadic: false + }; + var expressions = []; + var argsSemiColon = []; + var argsComma = []; + var isSemiColonSeparated; + var expressionContainsNamed; + var name; + var nameLoop; + var value; + var arg; + var expand; + var hasSep = true; + parserInput.save(); + + while (true) { + if (isCall) { + arg = parsers.detachedRuleset() || parsers.expression(); + } else { + parserInput.commentStore.length = 0; + + if (parserInput.$str('...')) { + returner.variadic = true; + + if (parserInput.$char(';') && !isSemiColonSeparated) { + isSemiColonSeparated = true; + } + + (isSemiColonSeparated ? argsSemiColon : argsComma).push({ + variadic: true + }); + break; + } + + arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true); + } + + if (!arg || !hasSep) { + break; + } + + nameLoop = null; + + if (arg.throwAwayComments) { + arg.throwAwayComments(); + } + + value = arg; + var val = null; + + if (isCall) { + // Variable + if (arg.value && arg.value.length == 1) { + val = arg.value[0]; + } + } else { + val = arg; + } + + if (val && (val instanceof tree.Variable || val instanceof tree.Property)) { + if (parserInput.$char(':')) { + if (expressions.length > 0) { + if (isSemiColonSeparated) { + error('Cannot mix ; and , as delimiter types'); + } + + expressionContainsNamed = true; + } + + value = parsers.detachedRuleset() || parsers.expression(); + + if (!value) { + if (isCall) { + error('could not understand value for named argument'); + } else { + parserInput.restore(); + returner.args = []; + return returner; + } + } + + nameLoop = name = val.name; + } else if (parserInput.$str('...')) { + if (!isCall) { + returner.variadic = true; + + if (parserInput.$char(';') && !isSemiColonSeparated) { + isSemiColonSeparated = true; + } + + (isSemiColonSeparated ? argsSemiColon : argsComma).push({ + name: arg.name, + variadic: true + }); + break; + } else { + expand = true; + } + } else if (!isCall) { + name = nameLoop = val.name; + value = null; + } + } + + if (value) { + expressions.push(value); + } + + argsComma.push({ + name: nameLoop, + value: value, + expand: expand + }); + + if (parserInput.$char(',')) { + hasSep = true; + continue; + } + + hasSep = parserInput.$char(';') === ';'; + + if (hasSep || isSemiColonSeparated) { + if (expressionContainsNamed) { + error('Cannot mix ; and , as delimiter types'); + } + + isSemiColonSeparated = true; + + if (expressions.length > 1) { + value = new tree.Value(expressions); + } + + argsSemiColon.push({ + name: name, + value: value, + expand: expand + }); + name = null; + expressions = []; + expressionContainsNamed = false; + } + } + + parserInput.forget(); + returner.args = isSemiColonSeparated ? argsSemiColon : argsComma; + return returner; + }, + // + // A Mixin definition, with a list of parameters + // + // .rounded (@radius: 2px, @color) { + // ... + // } + // + // Until we have a finer grained state-machine, we have to + // do a look-ahead, to make sure we don't have a mixin call. + // See the `rule` function for more information. + // + // We start by matching `.rounded (`, and then proceed on to + // the argument list, which has optional default values. + // We store the parameters in `params`, with a `value` key, + // if there is a value, such as in the case of `@radius`. + // + // Once we've got our params list, and a closing `)`, we parse + // the `{...}` block. + // + definition: function definition() { + var name; + var params = []; + var match; + var ruleset; + var cond; + var variadic = false; + + if (parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#' || parserInput.peek(/^[^{]*\}/)) { + return; + } + + parserInput.save(); + match = parserInput.$re(/^([#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/); + + if (match) { + name = match[1]; + var argInfo = this.args(false); + params = argInfo.args; + variadic = argInfo.variadic; // .mixincall("@{a}"); + // looks a bit like a mixin definition.. + // also + // .mixincall(@a: {rule: set;}); + // so we have to be nice and restore + + if (!parserInput.$char(')')) { + parserInput.restore('Missing closing \')\''); + return; + } + + parserInput.commentStore.length = 0; + + if (parserInput.$str('when')) { + // Guard + cond = expect(parsers.conditions, 'expected condition'); + } + + ruleset = parsers.block(); + + if (ruleset) { + parserInput.forget(); + return new tree.mixin.Definition(name, params, ruleset, cond, variadic); + } else { + parserInput.restore(); + } + } else { + parserInput.forget(); + } + }, + ruleLookups: function ruleLookups() { + var rule; + var lookups = []; + + if (parserInput.currentChar() !== '[') { + return; + } + + while (true) { + parserInput.save(); + rule = this.lookupValue(); + + if (!rule && rule !== '') { + parserInput.restore(); + break; + } + + lookups.push(rule); + parserInput.forget(); + } + + if (lookups.length > 0) { + return lookups; + } + }, + lookupValue: function lookupValue() { + parserInput.save(); + + if (!parserInput.$char('[')) { + parserInput.restore(); + return; + } + + var name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/); + + if (!parserInput.$char(']')) { + parserInput.restore(); + return; + } + + if (name || name === '') { + parserInput.forget(); + return name; + } + + parserInput.restore(); + } + }, + // + // Entities are the smallest recognized token, + // and can be found inside a rule's value. + // + entity: function entity() { + var entities = this.entities; + return this.comment() || entities.literal() || entities.variable() || entities.url() || entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) || entities.javascript(); + }, + // + // A Declaration terminator. Note that we use `peek()` to check for '}', + // because the `block` rule will be expecting it, but we still need to make sure + // it's there, if ';' was omitted. + // + end: function end() { + return parserInput.$char(';') || parserInput.peek('}'); + }, + // + // IE's alpha function + // + // alpha(opacity=88) + // + ieAlpha: function ieAlpha() { + var value; // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 + + if (!parserInput.$re(/^opacity=/i)) { + return; + } + + value = parserInput.$re(/^\d+/); + + if (!value) { + value = expect(parsers.entities.variable, 'Could not parse alpha'); + value = "@{".concat(value.name.slice(1), "}"); + } + + expectChar(')'); + return new tree.Quoted('', "alpha(opacity=".concat(value, ")")); + }, + // + // A Selector Element + // + // div + // + h1 + // #socks + // input[type="text"] + // + // Elements are the building blocks for Selectors, + // they are made out of a `Combinator` (see combinator rule), + // and an element name, such as a tag a class, or `*`. + // + element: function element() { + var e; + var c; + var v; + var index = parserInput.i; + c = this.combinator(); + e = parserInput.$re(/^(?:\d+\.\d+|\d+)%/) || parserInput.$re(/^(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) || parserInput.$char('*') || parserInput.$char('&') || this.attribute() || parserInput.$re(/^\([^&()@]+\)/) || parserInput.$re(/^[\.#:](?=@)/) || this.entities.variableCurly(); + + if (!e) { + parserInput.save(); + + if (parserInput.$char('(')) { + if ((v = this.selector(false)) && parserInput.$char(')')) { + e = new tree.Paren(v); + parserInput.forget(); + } else { + parserInput.restore('Missing closing \')\''); + } + } else { + parserInput.forget(); + } + } + + if (e) { + return new tree.Element(c, e, e instanceof tree.Variable, index, fileInfo); + } + }, + // + // Combinators combine elements together, in a Selector. + // + // Because our parser isn't white-space sensitive, special care + // has to be taken, when parsing the descendant combinator, ` `, + // as it's an empty space. We have to check the previous character + // in the input, to see if it's a ` ` character. More info on how + // we deal with this in *combinator.js*. + // + combinator: function combinator() { + var c = parserInput.currentChar(); + + if (c === '/') { + parserInput.save(); + var slashedCombinator = parserInput.$re(/^\/[a-z]+\//i); + + if (slashedCombinator) { + parserInput.forget(); + return new tree.Combinator(slashedCombinator); + } + + parserInput.restore(); + } + + if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') { + parserInput.i++; + + if (c === '^' && parserInput.currentChar() === '^') { + c = '^^'; + parserInput.i++; + } + + while (parserInput.isWhitespace()) { + parserInput.i++; + } + + return new tree.Combinator(c); + } else if (parserInput.isWhitespace(-1)) { + return new tree.Combinator(' '); + } else { + return new tree.Combinator(null); + } + }, + // + // A CSS Selector + // with less extensions e.g. the ability to extend and guard + // + // .class > div + h1 + // li a:hover + // + // Selectors are made out of one or more Elements, see above. + // + selector: function selector(isLess) { + var index = parserInput.i; + var elements; + var extendList; + var c; + var e; + var allExtends; + var when; + var condition; + isLess = isLess !== false; + + while (isLess && (extendList = this.extend()) || isLess && (when = parserInput.$str('when')) || (e = this.element())) { + if (when) { + condition = expect(this.conditions, 'expected condition'); + } else if (condition) { + error('CSS guard can only be used at the end of selector'); + } else if (extendList) { + if (allExtends) { + allExtends = allExtends.concat(extendList); + } else { + allExtends = extendList; + } + } else { + if (allExtends) { + error('Extend can only be used at the end of selector'); + } + + c = parserInput.currentChar(); + + if (elements) { + elements.push(e); + } else { + elements = [e]; + } + + e = null; + } + + if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') { + break; + } + } + + if (elements) { + return new tree.Selector(elements, allExtends, condition, index, fileInfo); + } + + if (allExtends) { + error('Extend must be used to extend a selector, it cannot be used on its own'); + } + }, + selectors: function selectors() { + var s; + var selectors; + + while (true) { + s = this.selector(); + + if (!s) { + break; + } + + if (selectors) { + selectors.push(s); + } else { + selectors = [s]; + } + + parserInput.commentStore.length = 0; + + if (s.condition && selectors.length > 1) { + error("Guards are only currently allowed on a single selector."); + } + + if (!parserInput.$char(',')) { + break; + } + + if (s.condition) { + error("Guards are only currently allowed on a single selector."); + } + + parserInput.commentStore.length = 0; + } + + return selectors; + }, + attribute: function attribute() { + if (!parserInput.$char('[')) { + return; + } + + var entities = this.entities; + var key; + var val; + var op; + + if (!(key = entities.variableCurly())) { + key = expect(/^(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\.)+/); + } + + op = parserInput.$re(/^[|~*$^]?=/); + + if (op) { + val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\w-]+/) || entities.variableCurly(); + } + + expectChar(']'); + return new tree.Attribute(key, op, val); + }, + // + // The `block` rule is used by `ruleset` and `mixin.definition`. + // It's a wrapper around the `primary` rule, with added `{}`. + // + block: function block() { + var content; + + if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) { + return content; + } + }, + blockRuleset: function blockRuleset() { + var block = this.block(); + + if (block) { + block = new tree.Ruleset(null, block); + } + + return block; + }, + detachedRuleset: function detachedRuleset() { + var argInfo; + var params; + var variadic; + parserInput.save(); + + if (parserInput.$re(/^[.#]\(/)) { + /** + * DR args currently only implemented for each() function, and not + * yet settable as `@dr: #(@arg) {}` + * This should be done when DRs are merged with mixins. + * See: https://github.com/less/less-meta/issues/16 + */ + argInfo = this.mixin.args(false); + params = argInfo.args; + variadic = argInfo.variadic; + + if (!parserInput.$char(')')) { + parserInput.restore(); + return; + } + } + + var blockRuleset = this.blockRuleset(); + + if (blockRuleset) { + parserInput.forget(); + + if (params) { + return new tree.mixin.Definition(null, params, blockRuleset, null, variadic); + } + + return new tree.DetachedRuleset(blockRuleset); + } + + parserInput.restore(); + }, + // + // div, .class, body > p {...} + // + ruleset: function ruleset() { + var selectors; + var rules; + var debugInfo; + parserInput.save(); + + if (context.dumpLineNumbers) { + debugInfo = getDebugInfo(parserInput.i); + } + + selectors = this.selectors(); + + if (selectors && (rules = this.block())) { + parserInput.forget(); + var ruleset = new tree.Ruleset(selectors, rules, context.strictImports); + + if (context.dumpLineNumbers) { + ruleset.debugInfo = debugInfo; + } + + return ruleset; + } else { + parserInput.restore(); + } + }, + declaration: function declaration() { + var name; + var value; + var index = parserInput.i; + var hasDR; + var c = parserInput.currentChar(); + var important; + var merge; + var isVariable; + + if (c === '.' || c === '#' || c === '&' || c === ':') { + return; + } + + parserInput.save(); + name = this.variable() || this.ruleProperty(); + + if (name) { + isVariable = typeof name === 'string'; + + if (isVariable) { + value = this.detachedRuleset(); + + if (value) { + hasDR = true; + } + } + + parserInput.commentStore.length = 0; + + if (!value) { + // a name returned by this.ruleProperty() is always an array of the form: + // [string-1, ..., string-n, ""] or [string-1, ..., string-n, "+"] + // where each item is a tree.Keyword or tree.Variable + merge = !isVariable && name.length > 1 && name.pop().value; // Custom property values get permissive parsing + + if (name[0].value && name[0].value.slice(0, 2) === '--') { + value = this.permissiveValue(); + } // Try to store values as anonymous + // If we need the value later we'll re-parse it in ruleset.parseValue + else { + value = this.anonymousValue(); + } + + if (value) { + parserInput.forget(); // anonymous values absorb the end ';' which is required for them to work + + return new tree.Declaration(name, value, false, merge, index, fileInfo); + } + + if (!value) { + value = this.value(); + } + + if (value) { + important = this.important(); + } else if (isVariable) { + // As a last resort, try permissiveValue + value = this.permissiveValue(); + } + } + + if (value && (this.end() || hasDR)) { + parserInput.forget(); + return new tree.Declaration(name, value, important, merge, index, fileInfo); + } else { + parserInput.restore(); + } + } else { + parserInput.restore(); + } + }, + anonymousValue: function anonymousValue() { + var index = parserInput.i; + var match = parserInput.$re(/^([^.#@\$+\/'"*`(;{}-]*);/); + + if (match) { + return new tree.Anonymous(match[1], index); + } + }, + + /** + * Used for custom properties, at-rules, and variables (as fallback) + * Parses almost anything inside of {} [] () "" blocks + * until it reaches outer-most tokens. + * + * First, it will try to parse comments and entities to reach + * the end. This is mostly like the Expression parser except no + * math is allowed. + */ + permissiveValue: function permissiveValue(untilTokens) { + var i; + var e; + var done; + var value; + var tok = untilTokens || ';'; + var index = parserInput.i; + var result = []; + + function testCurrentChar() { + var _char = parserInput.currentChar(); + + if (typeof tok === 'string') { + return _char === tok; + } else { + return tok.test(_char); + } + } + + if (testCurrentChar()) { + return; + } + + value = []; + + do { + e = this.comment(); + + if (e) { + value.push(e); + continue; + } + + e = this.entity(); + + if (e) { + value.push(e); + } + } while (e); + + done = testCurrentChar(); + + if (value.length > 0) { + value = new tree.Expression(value); + + if (done) { + return value; + } else { + result.push(value); + } // Preserve space before $parseUntil as it will not + + + if (parserInput.prevChar() === ' ') { + result.push(new tree.Anonymous(' ', index)); + } + } + + parserInput.save(); + value = parserInput.$parseUntil(tok); + + if (value) { + if (typeof value === 'string') { + error("Expected '".concat(value, "'"), 'Parse'); + } + + if (value.length === 1 && value[0] === ' ') { + parserInput.forget(); + return new tree.Anonymous('', index); + } + + var item; + + for (i = 0; i < value.length; i++) { + item = value[i]; + + if (Array.isArray(item)) { + // Treat actual quotes as normal quoted values + result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo)); + } else { + if (i === value.length - 1) { + item = item.trim(); + } // Treat like quoted values, but replace vars like unquoted expressions + + + var quote = new tree.Quoted('\'', item, true, index, fileInfo); + quote.variableRegex = /@([\w-]+)/g; + quote.propRegex = /\$([\w-]+)/g; + result.push(quote); + } + } + + parserInput.forget(); + return new tree.Expression(result, true); + } + + parserInput.restore(); + }, + // + // An @import atrule + // + // @import "lib"; + // + // Depending on our environment, importing is done differently: + // In the browser, it's an XHR request, in Node, it would be a + // file-system operation. The function used for importing is + // stored in `import`, which we pass to the Import constructor. + // + 'import': function _import() { + var path; + var features; + var index = parserInput.i; + var dir = parserInput.$re(/^@import?\s+/); + + if (dir) { + var options = (dir ? this.importOptions() : null) || {}; + + if (path = this.entities.quoted() || this.entities.url()) { + features = this.mediaFeatures(); + + if (!parserInput.$char(';')) { + parserInput.i = index; + error('missing semi-colon or unrecognised media features on import'); + } + + features = features && new tree.Value(features); + return new tree.Import(path, features, options, index, fileInfo); + } else { + parserInput.i = index; + error('malformed import statement'); + } + } + }, + importOptions: function importOptions() { + var o; + var options = {}; + var optionName; + var value; // list of options, surrounded by parens + + if (!parserInput.$char('(')) { + return null; + } + + do { + o = this.importOption(); + + if (o) { + optionName = o; + value = true; + + switch (optionName) { + case 'css': + optionName = 'less'; + value = false; + break; + + case 'once': + optionName = 'multiple'; + value = false; + break; + } + + options[optionName] = value; + + if (!parserInput.$char(',')) { + break; + } + } + } while (o); + + expectChar(')'); + return options; + }, + importOption: function importOption() { + var opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/); + + if (opt) { + return opt[1]; + } + }, + mediaFeature: function mediaFeature() { + var entities = this.entities; + var nodes = []; + var e; + var p; + parserInput.save(); + + do { + e = entities.keyword() || entities.variable() || entities.mixinLookup(); + + if (e) { + nodes.push(e); + } else if (parserInput.$char('(')) { + p = this.property(); + e = this.value(); + + if (parserInput.$char(')')) { + if (p && e) { + nodes.push(new tree.Paren(new tree.Declaration(p, e, null, null, parserInput.i, fileInfo, true))); + } else if (e) { + nodes.push(new tree.Paren(e)); + } else { + error('badly formed media feature definition'); + } + } else { + error('Missing closing \')\'', 'Parse'); + } + } + } while (e); + + parserInput.forget(); + + if (nodes.length > 0) { + return new tree.Expression(nodes); + } + }, + mediaFeatures: function mediaFeatures() { + var entities = this.entities; + var features = []; + var e; + + do { + e = this.mediaFeature(); + + if (e) { + features.push(e); + + if (!parserInput.$char(',')) { + break; + } + } else { + e = entities.variable() || entities.mixinLookup(); + + if (e) { + features.push(e); + + if (!parserInput.$char(',')) { + break; + } + } + } + } while (e); + + return features.length > 0 ? features : null; + }, + media: function media() { + var features; + var rules; + var media; + var debugInfo; + var index = parserInput.i; + + if (context.dumpLineNumbers) { + debugInfo = getDebugInfo(index); + } + + parserInput.save(); + + if (parserInput.$str('@media')) { + features = this.mediaFeatures(); + rules = this.block(); + + if (!rules) { + error('media definitions require block statements after any features'); + } + + parserInput.forget(); + media = new tree.Media(rules, features, index, fileInfo); + + if (context.dumpLineNumbers) { + media.debugInfo = debugInfo; + } + + return media; + } + + parserInput.restore(); + }, + // + // A @plugin directive, used to import plugins dynamically. + // + // @plugin (args) "lib"; + // + plugin: function plugin() { + var path; + var args; + var options; + var index = parserInput.i; + var dir = parserInput.$re(/^@plugin?\s+/); + + if (dir) { + args = this.pluginArgs(); + + if (args) { + options = { + pluginArgs: args, + isPlugin: true + }; + } else { + options = { + isPlugin: true + }; + } + + if (path = this.entities.quoted() || this.entities.url()) { + if (!parserInput.$char(';')) { + parserInput.i = index; + error('missing semi-colon on @plugin'); + } + + return new tree.Import(path, null, options, index, fileInfo); + } else { + parserInput.i = index; + error('malformed @plugin statement'); + } + } + }, + pluginArgs: function pluginArgs() { + // list of options, surrounded by parens + parserInput.save(); + + if (!parserInput.$char('(')) { + parserInput.restore(); + return null; + } + + var args = parserInput.$re(/^\s*([^\);]+)\)\s*/); + + if (args[1]) { + parserInput.forget(); + return args[1].trim(); + } else { + parserInput.restore(); + return null; + } + }, + // + // A CSS AtRule + // + // @charset "utf-8"; + // + atrule: function atrule() { + var index = parserInput.i; + var name; + var value; + var rules; + var nonVendorSpecificName; + var hasIdentifier; + var hasExpression; + var hasUnknown; + var hasBlock = true; + var isRooted = true; + + if (parserInput.currentChar() !== '@') { + return; + } + + value = this['import']() || this.plugin() || this.media(); + + if (value) { + return value; + } + + parserInput.save(); + name = parserInput.$re(/^@[a-z-]+/); + + if (!name) { + return; + } + + nonVendorSpecificName = name; + + if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) { + nonVendorSpecificName = "@".concat(name.slice(name.indexOf('-', 2) + 1)); + } + + switch (nonVendorSpecificName) { + case '@charset': + hasIdentifier = true; + hasBlock = false; + break; + + case '@namespace': + hasExpression = true; + hasBlock = false; + break; + + case '@keyframes': + case '@counter-style': + hasIdentifier = true; + break; + + case '@document': + case '@supports': + hasUnknown = true; + isRooted = false; + break; + + default: + hasUnknown = true; + break; + } + + parserInput.commentStore.length = 0; + + if (hasIdentifier) { + value = this.entity(); + + if (!value) { + error("expected ".concat(name, " identifier")); + } + } else if (hasExpression) { + value = this.expression(); + + if (!value) { + error("expected ".concat(name, " expression")); + } + } else if (hasUnknown) { + value = this.permissiveValue(/^[{;]/); + hasBlock = parserInput.currentChar() === '{'; + + if (!value) { + if (!hasBlock && parserInput.currentChar() !== ';') { + error("".concat(name, " rule is missing block or ending semi-colon")); + } + } else if (!value.value) { + value = null; + } + } + + if (hasBlock) { + rules = this.blockRuleset(); + } + + if (rules || !hasBlock && value && parserInput.$char(';')) { + parserInput.forget(); + return new tree.AtRule(name, value, rules, index, fileInfo, context.dumpLineNumbers ? getDebugInfo(index) : null, isRooted); + } + + parserInput.restore('at-rule options not recognised'); + }, + // + // A Value is a comma-delimited list of Expressions + // + // font-family: Baskerville, Georgia, serif; + // + // In a Rule, a Value represents everything after the `:`, + // and before the `;`. + // + value: function value() { + var e; + var expressions = []; + var index = parserInput.i; + + do { + e = this.expression(); + + if (e) { + expressions.push(e); + + if (!parserInput.$char(',')) { + break; + } + } + } while (e); + + if (expressions.length > 0) { + return new tree.Value(expressions, index); + } + }, + important: function important() { + if (parserInput.currentChar() === '!') { + return parserInput.$re(/^! *important/); + } + }, + sub: function sub() { + var a; + var e; + parserInput.save(); + + if (parserInput.$char('(')) { + a = this.addition(); + + if (a && parserInput.$char(')')) { + parserInput.forget(); + e = new tree.Expression([a]); + e.parens = true; + return e; + } + + parserInput.restore('Expected \')\''); + return; + } + + parserInput.restore(); + }, + multiplication: function multiplication() { + var m; + var a; + var op; + var operation; + var isSpaced; + m = this.operand(); + + if (m) { + isSpaced = parserInput.isWhitespace(-1); + + while (true) { + if (parserInput.peek(/^\/[*\/]/)) { + break; + } + + parserInput.save(); + op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./'); + + if (!op) { + parserInput.forget(); + break; + } + + a = this.operand(); + + if (!a) { + parserInput.restore(); + break; + } + + parserInput.forget(); + m.parensInOp = true; + a.parensInOp = true; + operation = new tree.Operation(op, [operation || m, a], isSpaced); + isSpaced = parserInput.isWhitespace(-1); + } + + return operation || m; + } + }, + addition: function addition() { + var m; + var a; + var op; + var operation; + var isSpaced; + m = this.multiplication(); + + if (m) { + isSpaced = parserInput.isWhitespace(-1); + + while (true) { + op = parserInput.$re(/^[-+]\s+/) || !isSpaced && (parserInput.$char('+') || parserInput.$char('-')); + + if (!op) { + break; + } + + a = this.multiplication(); + + if (!a) { + break; + } + + m.parensInOp = true; + a.parensInOp = true; + operation = new tree.Operation(op, [operation || m, a], isSpaced); + isSpaced = parserInput.isWhitespace(-1); + } + + return operation || m; + } + }, + conditions: function conditions() { + var a; + var b; + var index = parserInput.i; + var condition; + a = this.condition(true); + + if (a) { + while (true) { + if (!parserInput.peek(/^,\s*(not\s*)?\(/) || !parserInput.$char(',')) { + break; + } + + b = this.condition(true); + + if (!b) { + break; + } + + condition = new tree.Condition('or', condition || a, b, index); + } + + return condition || a; + } + }, + condition: function condition(needsParens) { + var result; + var logical; + var next; + + function or() { + return parserInput.$str('or'); + } + + result = this.conditionAnd(needsParens); + + if (!result) { + return; + } + + logical = or(); + + if (logical) { + next = this.condition(needsParens); + + if (next) { + result = new tree.Condition(logical, result, next); + } else { + return; + } + } + + return result; + }, + conditionAnd: function conditionAnd(needsParens) { + var result; + var logical; + var next; + var self = this; + + function insideCondition() { + var cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens); + + if (!cond && !needsParens) { + return self.atomicCondition(needsParens); + } + + return cond; + } + + function and() { + return parserInput.$str('and'); + } + + result = insideCondition(); + + if (!result) { + return; + } + + logical = and(); + + if (logical) { + next = this.conditionAnd(needsParens); + + if (next) { + result = new tree.Condition(logical, result, next); + } else { + return; + } + } + + return result; + }, + negatedCondition: function negatedCondition(needsParens) { + if (parserInput.$str('not')) { + var result = this.parenthesisCondition(needsParens); + + if (result) { + result.negate = !result.negate; + } + + return result; + } + }, + parenthesisCondition: function parenthesisCondition(needsParens) { + function tryConditionFollowedByParenthesis(me) { + var body; + parserInput.save(); + body = me.condition(needsParens); + + if (!body) { + parserInput.restore(); + return; + } + + if (!parserInput.$char(')')) { + parserInput.restore(); + return; + } + + parserInput.forget(); + return body; + } + + var body; + parserInput.save(); + + if (!parserInput.$str('(')) { + parserInput.restore(); + return; + } + + body = tryConditionFollowedByParenthesis(this); + + if (body) { + parserInput.forget(); + return body; + } + + body = this.atomicCondition(needsParens); + + if (!body) { + parserInput.restore(); + return; + } + + if (!parserInput.$char(')')) { + parserInput.restore("expected ')' got '".concat(parserInput.currentChar(), "'")); + return; + } + + parserInput.forget(); + return body; + }, + atomicCondition: function atomicCondition(needsParens) { + var entities = this.entities; + var index = parserInput.i; + var a; + var b; + var c; + var op; + + function cond() { + return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup(); + } + + cond = cond.bind(this); + a = cond(); + + if (a) { + if (parserInput.$char('>')) { + if (parserInput.$char('=')) { + op = '>='; + } else { + op = '>'; + } + } else if (parserInput.$char('<')) { + if (parserInput.$char('=')) { + op = '<='; + } else { + op = '<'; + } + } else if (parserInput.$char('=')) { + if (parserInput.$char('>')) { + op = '=>'; + } else if (parserInput.$char('<')) { + op = '=<'; + } else { + op = '='; + } + } + + if (op) { + b = cond(); + + if (b) { + c = new tree.Condition(op, a, b, index, false); + } else { + error('expected expression'); + } + } else { + c = new tree.Condition('=', a, new tree.Keyword('true'), index, false); + } + + return c; + } + }, + // + // An operand is anything that can be part of an operation, + // such as a Color, or a Variable + // + operand: function operand() { + var entities = this.entities; + var negate; + + if (parserInput.peek(/^-[@\$\(]/)) { + negate = parserInput.$char('-'); + } + + var o = this.sub() || entities.dimension() || entities.color() || entities.variable() || entities.property() || entities.call() || entities.quoted(true) || entities.colorKeyword() || entities.mixinLookup(); + + if (negate) { + o.parensInOp = true; + o = new tree.Negative(o); + } + + return o; + }, + // + // Expressions either represent mathematical operations, + // or white-space delimited Entities. + // + // 1px solid black + // @var * 2 + // + expression: function expression() { + var entities = []; + var e; + var delim; + var index = parserInput.i; + + do { + e = this.comment(); + + if (e) { + entities.push(e); + continue; + } + + e = this.addition() || this.entity(); + + if (e) { + entities.push(e); // operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here + + if (!parserInput.peek(/^\/[\/*]/)) { + delim = parserInput.$char('/'); + + if (delim) { + entities.push(new tree.Anonymous(delim, index)); + } + } + } + } while (e); + + if (entities.length > 0) { + return new tree.Expression(entities); + } + }, + property: function property() { + var name = parserInput.$re(/^(\*?-?[_a-zA-Z0-9-]+)\s*:/); + + if (name) { + return name[1]; + } + }, + ruleProperty: function ruleProperty() { + var name = []; + var index = []; + var s; + var k; + parserInput.save(); + var simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\s*:/); + + if (simpleProperty) { + name = [new tree.Keyword(simpleProperty[1])]; + parserInput.forget(); + return name; + } + + function match(re) { + var i = parserInput.i; + var chunk = parserInput.$re(re); + + if (chunk) { + index.push(i); + return name.push(chunk[1]); + } + } + + match(/^(\*?)/); + + while (true) { + if (!match(/^((?:[\w-]+)|(?:[@\$]\{[\w-]+\}))/)) { + break; + } + } + + if (name.length > 1 && match(/^((?:\+_|\+)?)\s*:/)) { + parserInput.forget(); // at last, we have the complete match now. move forward, + // convert name particles to tree objects and return: + + if (name[0] === '') { + name.shift(); + index.shift(); + } + + for (k = 0; k < name.length; k++) { + s = name[k]; + name[k] = s.charAt(0) !== '@' && s.charAt(0) !== '$' ? new tree.Keyword(s) : s.charAt(0) === '@' ? new tree.Variable("@".concat(s.slice(2, -1)), index[k], fileInfo) : new tree.Property("$".concat(s.slice(2, -1)), index[k], fileInfo); + } + + return name; + } + + parserInput.restore(); + } + } + }; + }; + + Parser.serializeVars = function (vars) { + var s = ''; + + for (var name in vars) { + if (Object.hasOwnProperty.call(vars, name)) { + var value = vars[name]; + s += "".concat((name[0] === '@' ? '' : '@') + name, ": ").concat(value).concat(String(value).slice(-1) === ';' ? '' : ';'); + } + } + + return s; + }; + + function _boolean(condition) { + return condition ? Keyword.True : Keyword.False; + } + + function If(condition, trueValue, falseValue) { + return condition ? trueValue : falseValue || new Anonymous(); + } + + var _boolean$1 = { + "boolean": _boolean, + 'if': If + }; + + var colorFunctions; + + function clamp$1(val) { + return Math.min(1, Math.max(0, val)); + } + + function hsla(origColor, hsl) { + var color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a); + + if (color) { + if (origColor.value && /^(rgb|hsl)/.test(origColor.value)) { + color.value = origColor.value; + } else { + color.value = 'rgb'; + } + + return color; + } + } + + function toHSL(color) { + if (color.toHSL) { + return color.toHSL(); + } else { + throw new Error('Argument cannot be evaluated to a color'); + } + } + + function toHSV(color) { + if (color.toHSV) { + return color.toHSV(); + } else { + throw new Error('Argument cannot be evaluated to a color'); + } + } + + function number(n) { + if (n instanceof Dimension) { + return parseFloat(n.unit.is('%') ? n.value / 100 : n.value); + } else if (typeof n === 'number') { + return n; + } else { + throw { + type: 'Argument', + message: 'color functions take numbers as parameters' + }; + } + } + + function scaled(n, size) { + if (n instanceof Dimension && n.unit.is('%')) { + return parseFloat(n.value * size / 100); + } else { + return number(n); + } + } + + colorFunctions = { + rgb: function rgb(r, g, b) { + var color = colorFunctions.rgba(r, g, b, 1.0); + + if (color) { + color.value = 'rgb'; + return color; + } + }, + rgba: function rgba(r, g, b, a) { + try { + if (r instanceof Color) { + if (g) { + a = number(g); + } else { + a = r.alpha; + } + + return new Color(r.rgb, a, 'rgba'); + } + + var rgb = [r, g, b].map(function (c) { + return scaled(c, 255); + }); + a = number(a); + return new Color(rgb, a, 'rgba'); + } catch (e) {} + }, + hsl: function hsl(h, s, l) { + var color = colorFunctions.hsla(h, s, l, 1.0); + + if (color) { + color.value = 'hsl'; + return color; + } + }, + hsla: function hsla(h, s, l, a) { + try { + var hue = function hue(h) { + h = h < 0 ? h + 1 : h > 1 ? h - 1 : h; + + if (h * 6 < 1) { + return m1 + (m2 - m1) * h * 6; + } else if (h * 2 < 1) { + return m2; + } else if (h * 3 < 2) { + return m1 + (m2 - m1) * (2 / 3 - h) * 6; + } else { + return m1; + } + }; + + if (h instanceof Color) { + if (s) { + a = number(s); + } else { + a = h.alpha; + } + + return new Color(h.rgb, a, 'hsla'); + } + + var m1; + var m2; + h = number(h) % 360 / 360; + s = clamp$1(number(s)); + l = clamp$1(number(l)); + a = clamp$1(number(a)); + m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s; + m1 = l * 2 - m2; + var rgb = [hue(h + 1 / 3) * 255, hue(h) * 255, hue(h - 1 / 3) * 255]; + a = number(a); + return new Color(rgb, a, 'hsla'); + } catch (e) {} + }, + hsv: function hsv(h, s, v) { + return colorFunctions.hsva(h, s, v, 1.0); + }, + hsva: function hsva(h, s, v, a) { + h = number(h) % 360 / 360 * 360; + s = number(s); + v = number(v); + a = number(a); + var i; + var f; + i = Math.floor(h / 60 % 6); + f = h / 60 - i; + var vs = [v, v * (1 - s), v * (1 - f * s), v * (1 - (1 - f) * s)]; + var perm = [[0, 3, 1], [2, 0, 1], [1, 0, 3], [1, 2, 0], [3, 1, 0], [0, 1, 2]]; + return colorFunctions.rgba(vs[perm[i][0]] * 255, vs[perm[i][1]] * 255, vs[perm[i][2]] * 255, a); + }, + hue: function hue(color) { + return new Dimension(toHSL(color).h); + }, + saturation: function saturation(color) { + return new Dimension(toHSL(color).s * 100, '%'); + }, + lightness: function lightness(color) { + return new Dimension(toHSL(color).l * 100, '%'); + }, + hsvhue: function hsvhue(color) { + return new Dimension(toHSV(color).h); + }, + hsvsaturation: function hsvsaturation(color) { + return new Dimension(toHSV(color).s * 100, '%'); + }, + hsvvalue: function hsvvalue(color) { + return new Dimension(toHSV(color).v * 100, '%'); + }, + red: function red(color) { + return new Dimension(color.rgb[0]); + }, + green: function green(color) { + return new Dimension(color.rgb[1]); + }, + blue: function blue(color) { + return new Dimension(color.rgb[2]); + }, + alpha: function alpha(color) { + return new Dimension(toHSL(color).a); + }, + luma: function luma(color) { + return new Dimension(color.luma() * color.alpha * 100, '%'); + }, + luminance: function luminance(color) { + var luminance = 0.2126 * color.rgb[0] / 255 + 0.7152 * color.rgb[1] / 255 + 0.0722 * color.rgb[2] / 255; + return new Dimension(luminance * color.alpha * 100, '%'); + }, + saturate: function saturate(color, amount, method) { + // filter: saturate(3.2); + // should be kept as is, so check for color + if (!color.rgb) { + return null; + } + + var hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.s += hsl.s * amount.value / 100; + } else { + hsl.s += amount.value / 100; + } + + hsl.s = clamp$1(hsl.s); + return hsla(color, hsl); + }, + desaturate: function desaturate(color, amount, method) { + var hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.s -= hsl.s * amount.value / 100; + } else { + hsl.s -= amount.value / 100; + } + + hsl.s = clamp$1(hsl.s); + return hsla(color, hsl); + }, + lighten: function lighten(color, amount, method) { + var hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.l += hsl.l * amount.value / 100; + } else { + hsl.l += amount.value / 100; + } + + hsl.l = clamp$1(hsl.l); + return hsla(color, hsl); + }, + darken: function darken(color, amount, method) { + var hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.l -= hsl.l * amount.value / 100; + } else { + hsl.l -= amount.value / 100; + } + + hsl.l = clamp$1(hsl.l); + return hsla(color, hsl); + }, + fadein: function fadein(color, amount, method) { + var hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.a += hsl.a * amount.value / 100; + } else { + hsl.a += amount.value / 100; + } + + hsl.a = clamp$1(hsl.a); + return hsla(color, hsl); + }, + fadeout: function fadeout(color, amount, method) { + var hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.a -= hsl.a * amount.value / 100; + } else { + hsl.a -= amount.value / 100; + } + + hsl.a = clamp$1(hsl.a); + return hsla(color, hsl); + }, + fade: function fade(color, amount) { + var hsl = toHSL(color); + hsl.a = amount.value / 100; + hsl.a = clamp$1(hsl.a); + return hsla(color, hsl); + }, + spin: function spin(color, amount) { + var hsl = toHSL(color); + var hue = (hsl.h + amount.value) % 360; + hsl.h = hue < 0 ? 360 + hue : hue; + return hsla(color, hsl); + }, + // + // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein + // http://sass-lang.com + // + mix: function mix(color1, color2, weight) { + if (!weight) { + weight = new Dimension(50); + } + + var p = weight.value / 100.0; + var w = p * 2 - 1; + var a = toHSL(color1).a - toHSL(color2).a; + var w1 = ((w * a == -1 ? w : (w + a) / (1 + w * a)) + 1) / 2.0; + var w2 = 1 - w1; + var rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2, color1.rgb[1] * w1 + color2.rgb[1] * w2, color1.rgb[2] * w1 + color2.rgb[2] * w2]; + var alpha = color1.alpha * p + color2.alpha * (1 - p); + return new Color(rgb, alpha); + }, + greyscale: function greyscale(color) { + return colorFunctions.desaturate(color, new Dimension(100)); + }, + contrast: function contrast(color, dark, light, threshold) { + // filter: contrast(3.2); + // should be kept as is, so check for color + if (!color.rgb) { + return null; + } + + if (typeof light === 'undefined') { + light = colorFunctions.rgba(255, 255, 255, 1.0); + } + + if (typeof dark === 'undefined') { + dark = colorFunctions.rgba(0, 0, 0, 1.0); + } // Figure out which is actually light and dark: + + + if (dark.luma() > light.luma()) { + var t = light; + light = dark; + dark = t; + } + + if (typeof threshold === 'undefined') { + threshold = 0.43; + } else { + threshold = number(threshold); + } + + if (color.luma() < threshold) { + return light; + } else { + return dark; + } + }, + // Changes made in 2.7.0 - Reverted in 3.0.0 + // contrast: function (color, color1, color2, threshold) { + // // Return which of `color1` and `color2` has the greatest contrast with `color` + // // according to the standard WCAG contrast ratio calculation. + // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef + // // The threshold param is no longer used, in line with SASS. + // // filter: contrast(3.2); + // // should be kept as is, so check for color + // if (!color.rgb) { + // return null; + // } + // if (typeof color1 === 'undefined') { + // color1 = colorFunctions.rgba(0, 0, 0, 1.0); + // } + // if (typeof color2 === 'undefined') { + // color2 = colorFunctions.rgba(255, 255, 255, 1.0); + // } + // var contrast1, contrast2; + // var luma = color.luma(); + // var luma1 = color1.luma(); + // var luma2 = color2.luma(); + // // Calculate contrast ratios for each color + // if (luma > luma1) { + // contrast1 = (luma + 0.05) / (luma1 + 0.05); + // } else { + // contrast1 = (luma1 + 0.05) / (luma + 0.05); + // } + // if (luma > luma2) { + // contrast2 = (luma + 0.05) / (luma2 + 0.05); + // } else { + // contrast2 = (luma2 + 0.05) / (luma + 0.05); + // } + // if (contrast1 > contrast2) { + // return color1; + // } else { + // return color2; + // } + // }, + argb: function argb(color) { + return new Anonymous(color.toARGB()); + }, + color: function color(c) { + if (c instanceof Quoted && /^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value)) { + var val = c.value.slice(1); + return new Color(val, undefined, "#".concat(val)); + } + + if (c instanceof Color || (c = Color.fromKeyword(c.value))) { + c.value = undefined; + return c; + } + + throw { + type: 'Argument', + message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF' + }; + }, + tint: function tint(color, amount) { + return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount); + }, + shade: function shade(color, amount) { + return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount); + } + }; + var color = colorFunctions; + + // ref: http://www.w3.org/TR/compositing-1 + + function colorBlend(mode, color1, color2) { + var ab = color1.alpha; // result + + var // backdrop + cb; + var as = color2.alpha; + var // source + cs; + var ar; + var cr; + var r = []; + ar = as + ab * (1 - as); + + for (var i = 0; i < 3; i++) { + cb = color1.rgb[i] / 255; + cs = color2.rgb[i] / 255; + cr = mode(cb, cs); + + if (ar) { + cr = (as * cs + ab * (cb - as * (cb + cs - cr))) / ar; + } + + r[i] = cr * 255; + } + + return new Color(r, ar); + } + + var colorBlendModeFunctions = { + multiply: function multiply(cb, cs) { + return cb * cs; + }, + screen: function screen(cb, cs) { + return cb + cs - cb * cs; + }, + overlay: function overlay(cb, cs) { + cb *= 2; + return cb <= 1 ? colorBlendModeFunctions.multiply(cb, cs) : colorBlendModeFunctions.screen(cb - 1, cs); + }, + softlight: function softlight(cb, cs) { + var d = 1; + var e = cb; + + if (cs > 0.5) { + e = 1; + d = cb > 0.25 ? Math.sqrt(cb) : ((16 * cb - 12) * cb + 4) * cb; + } + + return cb - (1 - 2 * cs) * e * (d - cb); + }, + hardlight: function hardlight(cb, cs) { + return colorBlendModeFunctions.overlay(cs, cb); + }, + difference: function difference(cb, cs) { + return Math.abs(cb - cs); + }, + exclusion: function exclusion(cb, cs) { + return cb + cs - 2 * cb * cs; + }, + // non-w3c functions: + average: function average(cb, cs) { + return (cb + cs) / 2; + }, + negation: function negation(cb, cs) { + return 1 - Math.abs(cb + cs - 1); + } + }; + + for (var f in colorBlendModeFunctions) { + if (colorBlendModeFunctions.hasOwnProperty(f)) { + colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]); + } + } + + var dataUri = (function (environment) { + var fallback = function fallback(functionThis, node) { + return new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); + }; + + return { + 'data-uri': function dataUri(mimetypeNode, filePathNode) { + if (!filePathNode) { + filePathNode = mimetypeNode; + mimetypeNode = null; + } + + var mimetype = mimetypeNode && mimetypeNode.value; + var filePath = filePathNode.value; + var currentFileInfo = this.currentFileInfo; + var currentDirectory = currentFileInfo.rewriteUrls ? currentFileInfo.currentDirectory : currentFileInfo.entryPath; + var fragmentStart = filePath.indexOf('#'); + var fragment = ''; + + if (fragmentStart !== -1) { + fragment = filePath.slice(fragmentStart); + filePath = filePath.slice(0, fragmentStart); + } + + var context = clone(this.context); + context.rawBuffer = true; + var fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true); + + if (!fileManager) { + return fallback(this, filePathNode); + } + + var useBase64 = false; // detect the mimetype if not given + + if (!mimetypeNode) { + mimetype = environment.mimeLookup(filePath); + + if (mimetype === 'image/svg+xml') { + useBase64 = false; + } else { + // use base 64 unless it's an ASCII or UTF-8 format + var charset = environment.charsetLookup(mimetype); + useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0; + } + + if (useBase64) { + mimetype += ';base64'; + } + } else { + useBase64 = /;base64$/.test(mimetype); } - } - ruleNodes = charsetRuleNodes.concat(ruleNodes); - // If this is the root node, we don't render - // a selector, or {}. - if (!this.root) { - debugInfo = getDebugInfo(context, this, tabSetStr); + var fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment); - if (debugInfo) { - output.add(debugInfo); - output.add(tabSetStr); + if (!fileSync.contents) { + logger.warn("Skipped data-uri embedding of ".concat(filePath, " because file not found")); + return fallback(this, filePathNode || mimetypeNode); } - var paths = this.paths, pathCnt = paths.length, - pathSubCnt; + var buf = fileSync.contents; - sep = context.compress ? ',' : (',\n' + tabSetStr); + if (useBase64 && !environment.encodeBase64) { + return fallback(this, filePathNode); + } - for (i = 0; i < pathCnt; i++) { - path = paths[i]; - if (!(pathSubCnt = path.length)) { continue; } - if (i > 0) { output.add(sep); } + buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf); + var uri = "data:".concat(mimetype, ",").concat(buf).concat(fragment); + return new URL(new Quoted("\"".concat(uri, "\""), uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); + } + }; + }); - context.firstSelector = true; - path[0].genCSS(context, output); + var getItemsFromNode = function getItemsFromNode(node) { + // handle non-array values as an array of length 1 + // return 'undefined' if index is invalid + var items = Array.isArray(node.value) ? node.value : Array(node); + return items; + }; - context.firstSelector = false; - for (j = 1; j < pathSubCnt; j++) { - path[j].genCSS(context, output); - } - } + var list = { + _SELF: function _SELF(n) { + return n; + }, + extract: function extract(values, index) { + index = index.value - 1; // (1-based index) - output.add((context.compress ? '{' : ' {\n') + tabRuleStr); - } + return getItemsFromNode(values)[index]; + }, + length: function length(values) { + return new Dimension(getItemsFromNode(values).length); + }, - // Compile rules and rulesets - for (i = 0; (rule = ruleNodes[i]); i++) { + /** + * Creates a Less list of incremental values. + * Modeled after Lodash's range function, also exists natively in PHP + * + * @param {Dimension} [start=1] + * @param {Dimension} end - e.g. 10 or 10px - unit is added to output + * @param {Dimension} [step=1] + */ + range: function range(start, end, step) { + var from; + var to; + var stepValue = 1; + var list = []; - if (i + 1 === ruleNodes.length) { - context.lastRule = true; - } + if (end) { + to = end; + from = start.value; - var currentLastRule = context.lastRule; - if (rule.isRulesetLike(rule)) { - context.lastRule = false; + if (step) { + stepValue = step.value; } + } else { + from = 1; + to = start; + } - if (rule.genCSS) { - rule.genCSS(context, output); - } else if (rule.value) { - output.add(rule.value.toString()); - } + for (var i = from; i <= to.value; i += stepValue) { + list.push(new Dimension(i, to.unit)); + } - context.lastRule = currentLastRule; + return new Expression(list); + }, + each: function each(list, rs) { + var rules = []; + var newRules; + var iterator; - if (!context.lastRule && rule.isVisible()) { - output.add(context.compress ? '' : ('\n' + tabRuleStr)); + if (list.value && !(list instanceof Quoted)) { + if (Array.isArray(list.value)) { + iterator = list.value; } else { - context.lastRule = false; - } - } - - if (!this.root) { - output.add((context.compress ? '}' : '\n' + tabSetStr + '}')); - context.tabLevel--; - } + iterator = [list.value]; + } + } else if (list.ruleset) { + iterator = list.ruleset.rules; + } else if (list.rules) { + iterator = list.rules; + } else if (Array.isArray(list)) { + iterator = list; + } else { + iterator = [list]; + } - if (!output.isEmpty() && !context.compress && this.firstRoot) { - output.add('\n'); - } -}; + var valueName = '@value'; + var keyName = '@key'; + var indexName = '@index'; -Ruleset.prototype.joinSelectors = function (paths, context, selectors) { - for (var s = 0; s < selectors.length; s++) { - this.joinSelector(paths, context, selectors[s]); - } -}; + if (rs.params) { + valueName = rs.params[0] && rs.params[0].name; + keyName = rs.params[1] && rs.params[1].name; + indexName = rs.params[2] && rs.params[2].name; + rs = rs.rules; + } else { + rs = rs.ruleset; + } -Ruleset.prototype.joinSelector = function (paths, context, selector) { + for (var i = 0; i < iterator.length; i++) { + var key = void 0; + var value = void 0; + var item = iterator[i]; - function createParenthesis(elementsToPak, originalElement) { - var replacementParen, j; - if (elementsToPak.length === 0) { - replacementParen = new Paren(elementsToPak[0]); + if (item instanceof Declaration) { + key = typeof item.name === 'string' ? item.name : item.name[0].value; + value = item.value; } else { - var insideParent = new Array(elementsToPak.length); - for (j = 0; j < elementsToPak.length; j++) { - insideParent[j] = new Element( - null, - elementsToPak[j], - originalElement.isVariable, - originalElement._index, - originalElement._fileInfo - ); - } - replacementParen = new Paren(new Selector(insideParent)); + key = new Dimension(i + 1); + value = item; } - return replacementParen; - } - function createSelector(containedElement, originalElement) { - var element, selector; - element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo); - selector = new Selector([element]); - return selector; - } + if (item instanceof Comment) { + continue; + } - // joins selector path from `beginningPath` with selector path in `addPath` - // `replacedElement` contains element that is being replaced by `addPath` - // returns concatenated path - function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) { - var newSelectorPath, lastSelector, newJoinedSelector; - // our new selector path - newSelectorPath = []; + newRules = rs.rules.slice(0); - // construct the joined selector - if & is the first thing this will be empty, - // if not newJoinedSelector will be the last set of elements in the selector - if (beginningPath.length > 0) { - newSelectorPath = utils.copyArray(beginningPath); - lastSelector = newSelectorPath.pop(); - newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements)); - } - else { - newJoinedSelector = originalSelector.createDerived([]); + if (valueName) { + newRules.push(new Declaration(valueName, value, false, false, this.index, this.currentFileInfo)); } - if (addPath.length > 0) { - // /deep/ is a CSS4 selector - (removed, so should deprecate) - // that is valid without anything in front of it - // so if the & does not have a combinator that is "" or " " then - // and there is a combinator on the parent, then grab that. - // this also allows + a { & .b { .a & { ... though not sure why you would want to do that - var combinator = replacedElement.combinator, parentEl = addPath[0].elements[0]; - if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) { - combinator = parentEl.combinator; - } - // join the elements so far with the first part of the parent - newJoinedSelector.elements.push(new Element( - combinator, - parentEl.value, - replacedElement.isVariable, - replacedElement._index, - replacedElement._fileInfo - )); - newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1)); + if (indexName) { + newRules.push(new Declaration(indexName, new Dimension(i + 1), false, false, this.index, this.currentFileInfo)); } - // now add the joined selector - but only if it is not empty - if (newJoinedSelector.elements.length !== 0) { - newSelectorPath.push(newJoinedSelector); + if (keyName) { + newRules.push(new Declaration(keyName, key, false, false, this.index, this.currentFileInfo)); } - // put together the parent selectors after the join (e.g. the rest of the parent) - if (addPath.length > 1) { - var restOfPath = addPath.slice(1); - restOfPath = restOfPath.map(function (selector) { - return selector.createDerived(selector.elements, []); - }); - newSelectorPath = newSelectorPath.concat(restOfPath); - } - return newSelectorPath; + rules.push(new Ruleset([new Selector([new Element("", '&')])], newRules, rs.strictImports, rs.visibilityInfo())); + } + + return new Ruleset([new Selector([new Element("", '&')])], rules, rs.strictImports, rs.visibilityInfo()).eval(this.context); } + }; - // joins selector path from `beginningPath` with every selector path in `addPaths` array - // `replacedElement` contains element that is being replaced by `addPath` - // returns array with all concatenated paths - function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) { - var j; - for (j = 0; j < beginningPath.length; j++) { - var newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector); - result.push(newSelectorPath); - } - return result; + var MathHelper = function MathHelper(fn, unit, n) { + if (!(n instanceof Dimension)) { + throw { + type: 'Argument', + message: 'argument must be a number' + }; } - function mergeElementsOnToSelectors(elements, selectors) { - var i, sel; + if (unit == null) { + unit = n.unit; + } else { + n = n.unify(); + } - if (elements.length === 0) { - return ; - } - if (selectors.length === 0) { - selectors.push([ new Selector(elements) ]); - return; - } + return new Dimension(fn(parseFloat(n.value)), unit); + }; - for (i = 0; (sel = selectors[i]); i++) { - // if the previous thing in sel is a parent this needs to join on to it - if (sel.length > 0) { - sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements)); - } - else { - sel.push(new Selector(elements)); - } - } + var mathFunctions = { + // name, unit + ceil: null, + floor: null, + sqrt: null, + abs: null, + tan: '', + sin: '', + cos: '', + atan: 'rad', + asin: 'rad', + acos: 'rad' + }; + + for (var f$1 in mathFunctions) { + if (mathFunctions.hasOwnProperty(f$1)) { + mathFunctions[f$1] = MathHelper.bind(null, Math[f$1], mathFunctions[f$1]); } + } - // replace all parent selectors inside `inSelector` by content of `context` array - // resulting selectors are returned inside `paths` array - // returns true if `inSelector` contained at least one parent selector - function replaceParentSelector(paths, context, inSelector) { - // The paths are [[Selector]] - // The first list is a list of comma separated selectors - // The inner list is a list of inheritance separated selectors - // e.g. - // .a, .b { - // .c { - // } - // } - // == [[.a] [.c]] [[.b] [.c]] - // - var i, j, k, currentElements, newSelectors, selectorsMultiplied, sel, el, hadParentSelector = false, length, lastSelector; - function findNestedSelector(element) { - var maybeSelector; - if (!(element.value instanceof Paren)) { - return null; - } + mathFunctions.round = function (n, f) { + var fraction = typeof f === 'undefined' ? 0 : f.value; + return MathHelper(function (num) { + return num.toFixed(fraction); + }, null, n); + }; - maybeSelector = element.value.value; - if (!(maybeSelector instanceof Selector)) { - return null; - } + var minMax = function minMax(isMin, args) { + args = Array.prototype.slice.call(args); - return maybeSelector; - } + switch (args.length) { + case 0: + throw { + type: 'Argument', + message: 'one or more arguments required' + }; + } - // the elements from the current selector so far - currentElements = []; - // the current list of new selectors to add to the path. - // We will build it up. We initiate it with one empty selector as we "multiply" the new selectors - // by the parents - newSelectors = [ - [] - ]; + var i; // key is the unit.toString() for unified Dimension values, - for (i = 0; (el = inSelector.elements[i]); i++) { - // non parent reference elements just get added - if (el.value !== '&') { - var nestedSelector = findNestedSelector(el); - if (nestedSelector != null) { - // merge the current list of non parent selector elements - // on to the current list of selectors to add - mergeElementsOnToSelectors(currentElements, newSelectors); - - var nestedPaths = [], replaced, replacedNewSelectors = []; - replaced = replaceParentSelector(nestedPaths, context, nestedSelector); - hadParentSelector = hadParentSelector || replaced; - // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors - for (k = 0; k < nestedPaths.length; k++) { - var replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el); - addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors); - } - newSelectors = replacedNewSelectors; - currentElements = []; + var j; + var current; + var currentUnified; + var referenceUnified; + var unit; + var unitStatic; + var unitClone; + var // elems only contains original argument values. + order = []; + var values = {}; // value is the index into the order array. - } else { - currentElements.push(el); - } + for (i = 0; i < args.length; i++) { + current = args[i]; - } else { - hadParentSelector = true; - // the new list of selectors to add - selectorsMultiplied = []; + if (!(current instanceof Dimension)) { + if (Array.isArray(args[i].value)) { + Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value)); + } - // merge the current list of non parent selector elements - // on to the current list of selectors to add - mergeElementsOnToSelectors(currentElements, newSelectors); + continue; + } - // loop through our current selectors - for (j = 0; j < newSelectors.length; j++) { - sel = newSelectors[j]; - // if we don't have any parent paths, the & might be in a mixin so that it can be used - // whether there are parents or not - if (context.length === 0) { - // the combinator used on el should now be applied to the next element instead so that - // it is not lost - if (sel.length > 0) { - sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo)); - } - selectorsMultiplied.push(sel); - } - else { - // and the parent selectors - for (k = 0; k < context.length; k++) { - // We need to put the current selectors - // then join the last selector's elements on to the parents selectors - var newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector); - // add that to our new set of selectors - selectorsMultiplied.push(newSelectorPath); - } - } - } + currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify(); + unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString(); + unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic; + unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone; + j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit]; - // our new selectors has been multiplied, so reset the state - newSelectors = selectorsMultiplied; - currentElements = []; - } + if (j === undefined) { + if (unitStatic !== undefined && unit !== unitStatic) { + throw { + type: 'Argument', + message: 'incompatible types' + }; } - // if we have any elements left over (e.g. .a& .b == .b) - // add them on to all the current selectors - mergeElementsOnToSelectors(currentElements, newSelectors); - - for (i = 0; i < newSelectors.length; i++) { - length = newSelectors[i].length; - if (length > 0) { - paths.push(newSelectors[i]); - lastSelector = newSelectors[i][length - 1]; - newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList); - } - } + values[unit] = order.length; + order.push(current); + continue; + } - return hadParentSelector; - } + referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify(); - function deriveSelector(visibilityInfo, deriveFrom) { - var newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition); - newSelector.copyVisibilityInfo(visibilityInfo); - return newSelector; + if (isMin && currentUnified.value < referenceUnified.value || !isMin && currentUnified.value > referenceUnified.value) { + order[j] = current; + } } - // joinSelector code follows - var i, newPaths, hadParentSelector; - - newPaths = []; - hadParentSelector = replaceParentSelector(newPaths, context, selector); - - if (!hadParentSelector) { - if (context.length > 0) { - newPaths = []; - for (i = 0; i < context.length; i++) { - - var concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo())); - - concatenated.push(selector); - newPaths.push(concatenated); - } - } - else { - newPaths = [[selector]]; - } + if (order.length == 1) { + return order[0]; } - for (i = 0; i < newPaths.length; i++) { - paths.push(newPaths[i]); - } - -}; -module.exports = Ruleset; - -},{"../contexts":13,"../functions/default":25,"../functions/function-registry":27,"../utils":89,"./anonymous":50,"./comment":57,"./debug-info":59,"./declaration":60,"./element":63,"./keyword":70,"./node":76,"./paren":78,"./selector":82}],82:[function(require,module,exports){ -var Node = require('./node'), - Element = require('./element'), - LessError = require('../less-error'); - -var Selector = function (elements, extendList, condition, index, currentFileInfo, visibilityInfo) { - this.extendList = extendList; - this.condition = condition; - this.evaldCondition = !condition; - this._index = index; - this._fileInfo = currentFileInfo; - this.elements = this.getElements(elements); - this.mixinElements_ = undefined; - this.copyVisibilityInfo(visibilityInfo); - this.setParent(this.elements, this); -}; -Selector.prototype = new Node(); -Selector.prototype.type = 'Selector'; -Selector.prototype.accept = function (visitor) { - if (this.elements) { - this.elements = visitor.visitArray(this.elements); - } - if (this.extendList) { - this.extendList = visitor.visitArray(this.extendList); - } - if (this.condition) { - this.condition = visitor.visit(this.condition); - } -}; -Selector.prototype.createDerived = function(elements, extendList, evaldCondition) { - elements = this.getElements(elements); - var newSelector = new Selector(elements, extendList || this.extendList, - null, this.getIndex(), this.fileInfo(), this.visibilityInfo()); - newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition; - newSelector.mediaEmpty = this.mediaEmpty; - return newSelector; -}; -Selector.prototype.getElements = function(els) { - if (!els) { - return [new Element('', '&', false, this._index, this._fileInfo)]; - } - if (typeof els === 'string') { - this.parse.parseNode( - els, - ['selector'], - this._index, - this._fileInfo, - function(err, result) { - if (err) { - throw new LessError({ - index: err.index, - message: err.message - }, this.parse.imports, this._fileInfo.filename); - } - els = result[0].elements; - }); - } - return els; -}; -Selector.prototype.createEmptySelectors = function() { - var el = new Element('', '&', false, this._index, this._fileInfo), - sels = [new Selector([el], null, null, this._index, this._fileInfo)]; - sels[0].mediaEmpty = true; - return sels; -}; -Selector.prototype.match = function (other) { - var elements = this.elements, - len = elements.length, - olen, i; - - other = other.mixinElements(); - olen = other.length; - if (olen === 0 || len < olen) { - return 0; - } else { - for (i = 0; i < olen; i++) { - if (elements[i].value !== other[i]) { - return 0; - } - } - } + args = order.map(function (a) { + return a.toCSS(this.context); + }).join(this.context.compress ? ',' : ', '); + return new Anonymous("".concat(isMin ? 'min' : 'max', "(").concat(args, ")")); + }; - return olen; // return number of matched elements -}; -Selector.prototype.mixinElements = function() { - if (this.mixinElements_) { - return this.mixinElements_; - } + var number$1 = { + min: function min() { + for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) { + args[_key] = arguments[_key]; + } - var elements = this.elements.map( function(v) { - return v.combinator.value + (v.value.value || v.value); - }).join('').match(/[,&#\*\.\w-]([\w-]|(\\.))*/g); + return minMax(true, args); + }, + max: function max() { + for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) { + args[_key2] = arguments[_key2]; + } - if (elements) { - if (elements[0] === '&') { - elements.shift(); - } - } else { - elements = []; - } - - return (this.mixinElements_ = elements); -}; -Selector.prototype.isJustParentSelector = function() { - return !this.mediaEmpty && - this.elements.length === 1 && - this.elements[0].value === '&' && - (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === ''); -}; -Selector.prototype.eval = function (context) { - var evaldCondition = this.condition && this.condition.eval(context), - elements = this.elements, extendList = this.extendList; - - elements = elements && elements.map(function (e) { return e.eval(context); }); - extendList = extendList && extendList.map(function(extend) { return extend.eval(context); }); - - return this.createDerived(elements, extendList, evaldCondition); -}; -Selector.prototype.genCSS = function (context, output) { - var i, element; - if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') { - output.add(' ', this.fileInfo(), this.getIndex()); - } - for (i = 0; i < this.elements.length; i++) { - element = this.elements[i]; - element.genCSS(context, output); - } -}; -Selector.prototype.getIsOutput = function() { - return this.evaldCondition; -}; -module.exports = Selector; - -},{"../less-error":38,"./element":63,"./node":76}],83:[function(require,module,exports){ -var Node = require('./node'); - -var UnicodeDescriptor = function (value) { - this.value = value; -}; -UnicodeDescriptor.prototype = new Node(); -UnicodeDescriptor.prototype.type = 'UnicodeDescriptor'; - -module.exports = UnicodeDescriptor; - -},{"./node":76}],84:[function(require,module,exports){ -var Node = require('./node'), - unitConversions = require('../data/unit-conversions'), - utils = require('../utils'); - -var Unit = function (numerator, denominator, backupUnit) { - this.numerator = numerator ? utils.copyArray(numerator).sort() : []; - this.denominator = denominator ? utils.copyArray(denominator).sort() : []; - if (backupUnit) { - this.backupUnit = backupUnit; - } else if (numerator && numerator.length) { - this.backupUnit = numerator[0]; - } -}; - -Unit.prototype = new Node(); -Unit.prototype.type = 'Unit'; -Unit.prototype.clone = function () { - return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit); -}; -Unit.prototype.genCSS = function (context, output) { - // Dimension checks the unit is singular and throws an error if in strict math mode. - var strictUnits = context && context.strictUnits; - if (this.numerator.length === 1) { - output.add(this.numerator[0]); // the ideal situation - } else if (!strictUnits && this.backupUnit) { - output.add(this.backupUnit); - } else if (!strictUnits && this.denominator.length) { - output.add(this.denominator[0]); - } -}; -Unit.prototype.toString = function () { - var i, returnStr = this.numerator.join('*'); - for (i = 0; i < this.denominator.length; i++) { - returnStr += '/' + this.denominator[i]; - } - return returnStr; -}; -Unit.prototype.compare = function (other) { - return this.is(other.toString()) ? 0 : undefined; -}; -Unit.prototype.is = function (unitString) { - return this.toString().toUpperCase() === unitString.toUpperCase(); -}; -Unit.prototype.isLength = function () { - return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS()); -}; -Unit.prototype.isEmpty = function () { - return this.numerator.length === 0 && this.denominator.length === 0; -}; -Unit.prototype.isSingular = function() { - return this.numerator.length <= 1 && this.denominator.length === 0; -}; -Unit.prototype.map = function(callback) { - var i; + return minMax(false, args); + }, + convert: function convert(val, unit) { + return val.convertTo(unit.value); + }, + pi: function pi() { + return new Dimension(Math.PI); + }, + mod: function mod(a, b) { + return new Dimension(a.value % b.value, a.unit); + }, + pow: function pow(x, y) { + if (typeof x === 'number' && typeof y === 'number') { + x = new Dimension(x); + y = new Dimension(y); + } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) { + throw { + type: 'Argument', + message: 'arguments must be numbers' + }; + } - for (i = 0; i < this.numerator.length; i++) { - this.numerator[i] = callback(this.numerator[i], false); + return new Dimension(Math.pow(x.value, y.value), x.unit); + }, + percentage: function percentage(n) { + var result = MathHelper(function (num) { + return num * 100; + }, '%', n); + return result; } + }; - for (i = 0; i < this.denominator.length; i++) { - this.denominator[i] = callback(this.denominator[i], true); - } -}; -Unit.prototype.usedUnits = function() { - var group, result = {}, mapUnit, groupName; + var string = { + e: function e(str) { + return new Quoted('"', str instanceof JavaScript ? str.evaluated : str.value, true); + }, + escape: function escape(str) { + return new Anonymous(encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B').replace(/\(/g, '%28').replace(/\)/g, '%29')); + }, + replace: function replace(string, pattern, replacement, flags) { + var result = string.value; + replacement = replacement.type === 'Quoted' ? replacement.value : replacement.toCSS(); + result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement); + return new Quoted(string.quote || '', result, string.escaped); + }, + '%': function _(string + /* arg, arg, ... */ + ) { + var args = Array.prototype.slice.call(arguments, 1); + var result = string.value; - mapUnit = function (atomicUnit) { + var _loop = function _loop(i) { /* jshint loopfunc:true */ - if (group.hasOwnProperty(atomicUnit) && !result[groupName]) { - result[groupName] = atomicUnit; - } - - return atomicUnit; - }; - - for (groupName in unitConversions) { - if (unitConversions.hasOwnProperty(groupName)) { - group = unitConversions[groupName]; - - this.map(mapUnit); - } - } - - return result; -}; -Unit.prototype.cancel = function () { - var counter = {}, atomicUnit, i; + result = result.replace(/%[sda]/i, function (token) { + var value = args[i].type === 'Quoted' && token.match(/s/i) ? args[i].value : args[i].toCSS(); + return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value; + }); + }; - for (i = 0; i < this.numerator.length; i++) { - atomicUnit = this.numerator[i]; - counter[atomicUnit] = (counter[atomicUnit] || 0) + 1; - } + for (var i = 0; i < args.length; i++) { + _loop(i); + } - for (i = 0; i < this.denominator.length; i++) { - atomicUnit = this.denominator[i]; - counter[atomicUnit] = (counter[atomicUnit] || 0) - 1; + result = result.replace(/%%/g, '%'); + return new Quoted(string.quote || '', result, string.escaped); } + }; - this.numerator = []; - this.denominator = []; - - for (atomicUnit in counter) { - if (counter.hasOwnProperty(atomicUnit)) { - var count = counter[atomicUnit]; + var svg = (function (environment) { + return { + 'svg-gradient': function svgGradient(direction) { + var stops; + var gradientDirectionSvg; + var gradientType = 'linear'; + var rectangleDimension = 'x="0" y="0" width="1" height="1"'; + var renderEnv = { + compress: false + }; + var returner; + var directionValue = direction.toCSS(renderEnv); + var i; + var color; + var position; + var positionValue; + var alpha; - if (count > 0) { - for (i = 0; i < count; i++) { - this.numerator.push(atomicUnit); - } - } else if (count < 0) { - for (i = 0; i < -count; i++) { - this.denominator.push(atomicUnit); - } - } + function throwArgumentDescriptor() { + throw { + type: 'Argument', + message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' + ' end_color [end_position] or direction, color list' + }; } - } - this.numerator.sort(); - this.denominator.sort(); -}; -module.exports = Unit; - -},{"../data/unit-conversions":16,"../utils":89,"./node":76}],85:[function(require,module,exports){ -var Node = require('./node'); - -var URL = function (val, index, currentFileInfo, isEvald) { - this.value = val; - this._index = index; - this._fileInfo = currentFileInfo; - this.isEvald = isEvald; -}; -URL.prototype = new Node(); -URL.prototype.type = 'Url'; -URL.prototype.accept = function (visitor) { - this.value = visitor.visit(this.value); -}; -URL.prototype.genCSS = function (context, output) { - output.add('url('); - this.value.genCSS(context, output); - output.add(')'); -}; -URL.prototype.eval = function (context) { - var val = this.value.eval(context), - rootpath; - - if (!this.isEvald) { - // Add the rootpath if the URL requires a rewrite - rootpath = this.fileInfo() && this.fileInfo().rootpath; - if (typeof rootpath === 'string' && - typeof val.value === 'string' && - context.pathRequiresRewrite(val.value)) { - if (!val.quote) { - rootpath = escapePath(rootpath); - } - val.value = context.rewritePath(val.value, rootpath); - } else { - val.value = context.normalizePath(val.value); - } + if (arguments.length == 2) { + if (arguments[1].value.length < 2) { + throwArgumentDescriptor(); + } - // Add url args if enabled - if (context.urlArgs) { - if (!val.value.match(/^\s*data:/)) { - var delimiter = val.value.indexOf('?') === -1 ? '?' : '&'; - var urlArgs = delimiter + context.urlArgs; - if (val.value.indexOf('#') !== -1) { - val.value = val.value.replace('#', urlArgs + '#'); - } else { - val.value += urlArgs; - } - } + stops = arguments[1].value; + } else if (arguments.length < 3) { + throwArgumentDescriptor(); + } else { + stops = Array.prototype.slice.call(arguments, 1); } - } - return new URL(val, this.getIndex(), this.fileInfo(), true); -}; - -function escapePath(path) { - return path.replace(/[\(\)'"\s]/g, function(match) { return '\\' + match; }); -} + switch (directionValue) { + case 'to bottom': + gradientDirectionSvg = 'x1="0%" y1="0%" x2="0%" y2="100%"'; + break; -module.exports = URL; + case 'to right': + gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="0%"'; + break; -},{"./node":76}],86:[function(require,module,exports){ -var Node = require('./node'); + case 'to bottom right': + gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="100%"'; + break; -var Value = function (value) { - if (!value) { - throw new Error('Value requires an array argument'); - } - if (!Array.isArray(value)) { - this.value = [ value ]; - } - else { - this.value = value; - } -}; -Value.prototype = new Node(); -Value.prototype.type = 'Value'; -Value.prototype.accept = function (visitor) { - if (this.value) { - this.value = visitor.visitArray(this.value); - } -}; -Value.prototype.eval = function (context) { - if (this.value.length === 1) { - return this.value[0].eval(context); - } else { - return new Value(this.value.map(function (v) { - return v.eval(context); - })); - } -}; -Value.prototype.genCSS = function (context, output) { - var i; - for (i = 0; i < this.value.length; i++) { - this.value[i].genCSS(context, output); - if (i + 1 < this.value.length) { - output.add((context && context.compress) ? ',' : ', '); - } - } -}; -module.exports = Value; - -},{"./node":76}],87:[function(require,module,exports){ -var Node = require('./node'), - Variable = require('./variable'), - Ruleset = require('./ruleset'), - DetachedRuleset = require('./detached-ruleset'), - LessError = require('../less-error'); - -var VariableCall = function (variable, index, currentFileInfo) { - this.variable = variable; - this._index = index; - this._fileInfo = currentFileInfo; - this.allowRoot = true; -}; -VariableCall.prototype = new Node(); -VariableCall.prototype.type = 'VariableCall'; -VariableCall.prototype.eval = function (context) { - var rules, detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context), - error = new LessError({message: 'Could not evaluate variable call ' + this.variable}); - - if (!detachedRuleset.ruleset) { - if (detachedRuleset.rules) { - rules = detachedRuleset; - } - else if (Array.isArray(detachedRuleset)) { - rules = new Ruleset('', detachedRuleset); - } - else if (Array.isArray(detachedRuleset.value)) { - rules = new Ruleset('', detachedRuleset.value); + case 'to top right': + gradientDirectionSvg = 'x1="0%" y1="100%" x2="100%" y2="0%"'; + break; + + case 'ellipse': + case 'ellipse at center': + gradientType = 'radial'; + gradientDirectionSvg = 'cx="50%" cy="50%" r="75%"'; + rectangleDimension = 'x="-50" y="-50" width="101" height="101"'; + break; + + default: + throw { + type: 'Argument', + message: 'svg-gradient direction must be \'to bottom\', \'to right\',' + ' \'to bottom right\', \'to top right\' or \'ellipse at center\'' + }; } - else { - throw error; + + returner = "<".concat(gradientType, "Gradient id=\"g\" ").concat(gradientDirectionSvg, ">"); + + for (i = 0; i < stops.length; i += 1) { + if (stops[i] instanceof Expression) { + color = stops[i].value[0]; + position = stops[i].value[1]; + } else { + color = stops[i]; + position = undefined; + } + + if (!(color instanceof Color) || !((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension)) { + throwArgumentDescriptor(); + } + + positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%'; + alpha = color.alpha; + returner += ""); } - detachedRuleset = new DetachedRuleset(rules); - } - if (detachedRuleset.ruleset) { - return detachedRuleset.callEval(context); - } - throw error; -}; -module.exports = VariableCall; -},{"../less-error":38,"./detached-ruleset":61,"./node":76,"./ruleset":81,"./variable":88}],88:[function(require,module,exports){ -var Node = require('./node'), - Call = require('./call'); + returner += ""); + returner = encodeURIComponent(returner); + returner = "data:image/svg+xml,".concat(returner); + return new URL(new Quoted("'".concat(returner, "'"), returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); + } + }; + }); -var Variable = function (name, index, currentFileInfo) { - this.name = name; - this._index = index; - this._fileInfo = currentFileInfo; -}; -Variable.prototype = new Node(); -Variable.prototype.type = 'Variable'; -Variable.prototype.eval = function (context) { - var variable, name = this.name; + var isa = function isa(n, Type) { + return n instanceof Type ? Keyword.True : Keyword.False; + }; - if (name.indexOf('@@') === 0) { - name = '@' + new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value; + var isunit = function isunit(n, unit) { + if (unit === undefined) { + throw { + type: 'Argument', + message: 'missing the required second argument to isunit.' + }; } - if (this.evaluating) { - throw { type: 'Name', - message: 'Recursive variable definition for ' + name, - filename: this.fileInfo().filename, - index: this.getIndex() }; + unit = typeof unit.value === 'string' ? unit.value : unit; + + if (typeof unit !== 'string') { + throw { + type: 'Argument', + message: 'Second argument to isunit should be a unit or a string.' + }; } - this.evaluating = true; + return n instanceof Dimension && n.unit.is(unit) ? Keyword.True : Keyword.False; + }; - variable = this.find(context.frames, function (frame) { - var v = frame.variable(name); - if (v) { - if (v.important) { - var importantScope = context.importantScope[context.importantScope.length - 1]; - importantScope.important = v.important; - } - // If in calc, wrap vars in a function call to cascade evaluate args first - if (context.inCalc) { - return (new Call('_SELF', [v.value])).eval(context); - } - else { - return v.value.eval(context); - } + var types = { + isruleset: function isruleset(n) { + return isa(n, DetachedRuleset); + }, + iscolor: function iscolor(n) { + return isa(n, Color); + }, + isnumber: function isnumber(n) { + return isa(n, Dimension); + }, + isstring: function isstring(n) { + return isa(n, Quoted); + }, + iskeyword: function iskeyword(n) { + return isa(n, Keyword); + }, + isurl: function isurl(n) { + return isa(n, URL); + }, + ispixel: function ispixel(n) { + return isunit(n, 'px'); + }, + ispercentage: function ispercentage(n) { + return isunit(n, '%'); + }, + isem: function isem(n) { + return isunit(n, 'em'); + }, + isunit: isunit, + unit: function unit(val, _unit) { + if (!(val instanceof Dimension)) { + throw { + type: 'Argument', + message: "the first argument to unit must be a number".concat(val instanceof Operation ? '. Have you forgotten parenthesis?' : '') + }; + } + + if (_unit) { + if (_unit instanceof Keyword) { + _unit = _unit.value; + } else { + _unit = _unit.toCSS(); } - }); - if (variable) { - this.evaluating = false; - return variable; - } else { - throw { type: 'Name', - message: 'variable ' + name + ' is undefined', - filename: this.fileInfo().filename, - index: this.getIndex() }; - } -}; -Variable.prototype.find = function (obj, fun) { - for (var i = 0, r; i < obj.length; i++) { - r = fun.call(obj, obj[i]); - if (r) { return r; } + } else { + _unit = ''; + } + + return new Dimension(val.value, _unit); + }, + 'get-unit': function getUnit(n) { + return new Anonymous(n.unit); } - return null; -}; -module.exports = Variable; + }; -},{"./call":54,"./node":76}],89:[function(require,module,exports){ -/* jshint proto: true */ -var Constants = require('./constants'); -var clone = require('clone'); + var Functions = (function (environment) { + var functions = { + functionRegistry: functionRegistry, + functionCaller: functionCaller + }; // register functions + + functionRegistry.addMultiple(_boolean$1); + functionRegistry.addMultiple(defaultFunc$1); + functionRegistry.addMultiple(color); + functionRegistry.addMultiple(colorBlend); + functionRegistry.addMultiple(dataUri(environment)); + functionRegistry.addMultiple(list); + functionRegistry.addMultiple(mathFunctions); + functionRegistry.addMultiple(number$1); + functionRegistry.addMultiple(string); + functionRegistry.addMultiple(svg()); + functionRegistry.addMultiple(types); + return functions; + }); -var utils = { - getLocation: function(index, inputStream) { - var n = index + 1, - line = null, - column = -1; + var sourceMapOutput = (function (environment) { + var SourceMapOutput = + /*#__PURE__*/ + function () { + function SourceMapOutput(options) { + _classCallCheck(this, SourceMapOutput); - while (--n >= 0 && inputStream.charAt(n) !== '\n') { - column++; - } + this._css = []; + this._rootNode = options.rootNode; + this._contentsMap = options.contentsMap; + this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap; - if (typeof index === 'number') { - line = (inputStream.slice(0, index).match(/\n/g) || '').length; + if (options.sourceMapFilename) { + this._sourceMapFilename = options.sourceMapFilename.replace(/\\/g, '/'); } - return { - line: line, - column: column - }; - }, - copyArray: function(arr) { - var i, length = arr.length, - copy = new Array(length); - - for (i = 0; i < length; i++) { - copy[i] = arr[i]; - } - return copy; - }, - clone: function (obj) { - var cloned = {}; - for (var prop in obj) { - if (obj.hasOwnProperty(prop)) { - cloned[prop] = obj[prop]; - } - } - return cloned; - }, - copyOptions: function(obj1, obj2) { - if (obj2 && obj2._defaults) { - return obj2; - } - var opts = utils.defaults(obj1, obj2); - if (opts.strictMath) { - opts.math = Constants.Math.STRICT_LEGACY; - } - // Back compat with changed relativeUrls option - if (opts.relativeUrls) { - opts.rewriteUrls = Constants.RewriteUrls.ALL; - } - if (typeof opts.math === 'string') { - switch (opts.math.toLowerCase()) { - case 'always': - opts.math = Constants.Math.ALWAYS; - break; - case 'parens-division': - opts.math = Constants.Math.PARENS_DIVISION; - break; - case 'strict': - case 'parens': - opts.math = Constants.Math.PARENS; - break; - case 'strict-legacy': - opts.math = Constants.Math.STRICT_LEGACY; - } + this._outputFilename = options.outputFilename; + this.sourceMapURL = options.sourceMapURL; + + if (options.sourceMapBasepath) { + this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\/g, '/'); } - if (typeof opts.rewriteUrls === 'string') { - switch (opts.rewriteUrls.toLowerCase()) { - case 'off': - opts.rewriteUrls = Constants.RewriteUrls.OFF; - break; - case 'local': - opts.rewriteUrls = Constants.RewriteUrls.LOCAL; - break; - case 'all': - opts.rewriteUrls = Constants.RewriteUrls.ALL; - break; - } + + if (options.sourceMapRootpath) { + this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\/g, '/'); + + if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') { + this._sourceMapRootpath += '/'; + } + } else { + this._sourceMapRootpath = ''; } - return opts; - }, - defaults: function(obj1, obj2) { - var newObj = obj2 || {}; - if (!obj2._defaults) { - newObj = {}; - var defaults = clone(obj1); - newObj._defaults = defaults; - var cloned = obj2 ? clone(obj2) : {}; - Object.assign(newObj, defaults, cloned); - } - return newObj; - }, - merge: function(obj1, obj2) { - for (var prop in obj2) { - if (obj2.hasOwnProperty(prop)) { - obj1[prop] = obj2[prop]; + + this._outputSourceFiles = options.outputSourceFiles; + this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator(); + this._lineNumber = 0; + this._column = 0; + } + + _createClass(SourceMapOutput, [{ + key: "removeBasepath", + value: function removeBasepath(path) { + if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) { + path = path.substring(this._sourceMapBasepath.length); + + if (path.charAt(0) === '\\' || path.charAt(0) === '/') { + path = path.substring(1); } + } + + return path; } - return obj1; - }, - flattenArray: function(arr, result) { - result = result || []; - for (var i = 0, length = arr.length; i < length; i++) { - var value = arr[i]; - if (Array.isArray(value)) { - utils.flattenArray(value, result); - } else { - if (value !== undefined) { - result.push(value); - } - } + }, { + key: "normalizeFilename", + value: function normalizeFilename(filename) { + filename = filename.replace(/\\/g, '/'); + filename = this.removeBasepath(filename); + return (this._sourceMapRootpath || '') + filename; } - return result; - } -}; + }, { + key: "add", + value: function add(chunk, fileInfo, index, mapLines) { + // ignore adding empty strings + if (!chunk) { + return; + } -module.exports = utils; -},{"./constants":12,"clone":100}],90:[function(require,module,exports){ -var tree = require('../tree'), - Visitor = require('./visitor'), - logger = require('../logger'), - utils = require('../utils'); + var lines; + var sourceLines; + var columns; + var sourceColumns; + var i; -/* jshint loopfunc:true */ + if (fileInfo && fileInfo.filename) { + var inputSource = this._contentsMap[fileInfo.filename]; // remove vars/banner added to the top of the file -var ExtendFinderVisitor = function() { - this._visitor = new Visitor(this); - this.contexts = []; - this.allExtendsStack = [[]]; -}; + if (this._contentsIgnoredCharsMap[fileInfo.filename]) { + // adjust the index + index -= this._contentsIgnoredCharsMap[fileInfo.filename]; -ExtendFinderVisitor.prototype = { - run: function (root) { - root = this._visitor.visit(root); - root.allExtends = this.allExtendsStack[0]; - return root; - }, - visitDeclaration: function (declNode, visitArgs) { - visitArgs.visitDeeper = false; - }, - visitMixinDefinition: function (mixinDefinitionNode, visitArgs) { - visitArgs.visitDeeper = false; - }, - visitRuleset: function (rulesetNode, visitArgs) { - if (rulesetNode.root) { - return; - } + if (index < 0) { + index = 0; + } // adjust the source - var i, j, extend, allSelectorsExtendList = [], extendList; - // get &:extend(.a); rules which apply to all selectors in this ruleset - var rules = rulesetNode.rules, ruleCnt = rules ? rules.length : 0; - for (i = 0; i < ruleCnt; i++) { - if (rulesetNode.rules[i] instanceof tree.Extend) { - allSelectorsExtendList.push(rules[i]); - rulesetNode.extendOnEveryPath = true; + inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]); + } // ignore empty content + + + if (inputSource === undefined) { + return; } - } - // now find every selector and apply the extends that apply to all extends - // and the ones which apply to an individual extend - var paths = rulesetNode.paths; - for (i = 0; i < paths.length; i++) { - var selectorPath = paths[i], - selector = selectorPath[selectorPath.length - 1], - selExtendList = selector.extendList; + inputSource = inputSource.substring(0, index); + sourceLines = inputSource.split('\n'); + sourceColumns = sourceLines[sourceLines.length - 1]; + } - extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList) - : allSelectorsExtendList; + lines = chunk.split('\n'); + columns = lines[lines.length - 1]; - if (extendList) { - extendList = extendList.map(function(allSelectorsExtend) { - return allSelectorsExtend.clone(); + if (fileInfo && fileInfo.filename) { + if (!mapLines) { + this._sourceMapGenerator.addMapping({ + generated: { + line: this._lineNumber + 1, + column: this._column + }, + original: { + line: sourceLines.length, + column: sourceColumns.length + }, + source: this.normalizeFilename(fileInfo.filename) + }); + } else { + for (i = 0; i < lines.length; i++) { + this._sourceMapGenerator.addMapping({ + generated: { + line: this._lineNumber + i + 1, + column: i === 0 ? this._column : 0 + }, + original: { + line: sourceLines.length + i, + column: i === 0 ? sourceColumns.length : 0 + }, + source: this.normalizeFilename(fileInfo.filename) }); + } } + } - for (j = 0; j < extendList.length; j++) { - this.foundExtends = true; - extend = extendList[j]; - extend.findSelfSelectors(selectorPath); - extend.ruleset = rulesetNode; - if (j === 0) { extend.firstExtendOnThisSelectorPath = true; } - this.allExtendsStack[this.allExtendsStack.length - 1].push(extend); - } - } + if (lines.length === 1) { + this._column += columns.length; + } else { + this._lineNumber += lines.length - 1; + this._column = columns.length; + } - this.contexts.push(rulesetNode.selectors); - }, - visitRulesetOut: function (rulesetNode) { - if (!rulesetNode.root) { - this.contexts.length = this.contexts.length - 1; + this._css.push(chunk); } - }, - visitMedia: function (mediaNode, visitArgs) { - mediaNode.allExtends = []; - this.allExtendsStack.push(mediaNode.allExtends); - }, - visitMediaOut: function (mediaNode) { - this.allExtendsStack.length = this.allExtendsStack.length - 1; - }, - visitAtRule: function (atRuleNode, visitArgs) { - atRuleNode.allExtends = []; - this.allExtendsStack.push(atRuleNode.allExtends); - }, - visitAtRuleOut: function (atRuleNode) { - this.allExtendsStack.length = this.allExtendsStack.length - 1; - } -}; + }, { + key: "isEmpty", + value: function isEmpty() { + return this._css.length === 0; + } + }, { + key: "toCSS", + value: function toCSS(context) { + this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ + file: this._outputFilename, + sourceRoot: null + }); -var ProcessExtendsVisitor = function() { - this._visitor = new Visitor(this); -}; + if (this._outputSourceFiles) { + for (var filename in this._contentsMap) { + if (this._contentsMap.hasOwnProperty(filename)) { + var source = this._contentsMap[filename]; -ProcessExtendsVisitor.prototype = { - run: function(root) { - var extendFinder = new ExtendFinderVisitor(); - this.extendIndices = {}; - extendFinder.run(root); - if (!extendFinder.foundExtends) { return root; } - root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends)); - this.allExtendsStack = [root.allExtends]; - var newRoot = this._visitor.visit(root); - this.checkExtendsForNonMatched(root.allExtends); - return newRoot; - }, - checkExtendsForNonMatched: function(extendList) { - var indices = this.extendIndices; - extendList.filter(function(extend) { - return !extend.hasFoundMatches && extend.parent_ids.length == 1; - }).forEach(function(extend) { - var selector = '_unknown_'; - try { - selector = extend.selector.toCSS({}); - } - catch (_) {} + if (this._contentsIgnoredCharsMap[filename]) { + source = source.slice(this._contentsIgnoredCharsMap[filename]); + } - if (!indices[extend.index + ' ' + selector]) { - indices[extend.index + ' ' + selector] = true; - logger.warn('extend \'' + selector + '\' has no matches'); + this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source); + } } - }); - }, - doExtendChaining: function (extendsList, extendsListTarget, iterationCount) { - // - // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering - // and pasting the selector we would do normally, but we are also adding an extend with the same target selector - // this means this new extend can then go and alter other extends - // - // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors - // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already - // processed if we look at each selector at a time, as is done in visitRuleset - - var extendIndex, targetExtendIndex, matches, extendsToAdd = [], newSelector, extendVisitor = this, selectorPath, - extend, targetExtend, newExtend; + } - iterationCount = iterationCount || 0; + this._rootNode.genCSS(context, this); - // loop through comparing every extend with every target extend. - // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place - // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one - // and the second is the target. - // the separation into two lists allows us to process a subset of chains with a bigger set, as is the - // case when processing media queries - for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) { - for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) { + if (this._css.length > 0) { + var sourceMapURL; + var sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON()); - extend = extendsList[extendIndex]; - targetExtend = extendsListTarget[targetExtendIndex]; + if (this.sourceMapURL) { + sourceMapURL = this.sourceMapURL; + } else if (this._sourceMapFilename) { + sourceMapURL = this._sourceMapFilename; + } - // look for circular references - if ( extend.parent_ids.indexOf( targetExtend.object_id ) >= 0 ) { continue; } + this.sourceMapURL = sourceMapURL; + this.sourceMap = sourceMapContent; + } - // find a match in the target extends self selector (the bit before :extend) - selectorPath = [targetExtend.selfSelectors[0]]; - matches = extendVisitor.findMatch(extend, selectorPath); + return this._css.join(''); + } + }]); - if (matches.length) { - extend.hasFoundMatches = true; + return SourceMapOutput; + }(); - // we found a match, so for each self selector.. - extend.selfSelectors.forEach(function(selfSelector) { - var info = targetExtend.visibilityInfo(); + return SourceMapOutput; + }); - // process the extend as usual - newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible()); + var sourceMapBuilder = (function (SourceMapOutput, environment) { + var SourceMapBuilder = + /*#__PURE__*/ + function () { + function SourceMapBuilder(options) { + _classCallCheck(this, SourceMapBuilder); - // but now we create a new extend from it - newExtend = new(tree.Extend)(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info); - newExtend.selfSelectors = newSelector; + this.options = options; + } - // add the extend onto the list of extends for that selector - newSelector[newSelector.length - 1].extendList = [newExtend]; + _createClass(SourceMapBuilder, [{ + key: "toCSS", + value: function toCSS(rootNode, options, imports) { + var sourceMapOutput = new SourceMapOutput({ + contentsIgnoredCharsMap: imports.contentsIgnoredChars, + rootNode: rootNode, + contentsMap: imports.contents, + sourceMapFilename: this.options.sourceMapFilename, + sourceMapURL: this.options.sourceMapURL, + outputFilename: this.options.sourceMapOutputFilename, + sourceMapBasepath: this.options.sourceMapBasepath, + sourceMapRootpath: this.options.sourceMapRootpath, + outputSourceFiles: this.options.outputSourceFiles, + sourceMapGenerator: this.options.sourceMapGenerator, + sourceMapFileInline: this.options.sourceMapFileInline + }); + var css = sourceMapOutput.toCSS(options); + this.sourceMap = sourceMapOutput.sourceMap; + this.sourceMapURL = sourceMapOutput.sourceMapURL; - // record that we need to add it. - extendsToAdd.push(newExtend); - newExtend.ruleset = targetExtend.ruleset; + if (this.options.sourceMapInputFilename) { + this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename); + } - // remember its parents for circular references - newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids); + if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) { + this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL); + } - // only process the selector once.. if we have :extend(.a,.b) then multiple - // extends will look at the same selector path, so when extending - // we know that any others will be duplicates in terms of what is added to the css - if (targetExtend.firstExtendOnThisSelectorPath) { - newExtend.firstExtendOnThisSelectorPath = true; - targetExtend.ruleset.paths.push(newSelector); - } - }); - } - } + return css + this.getCSSAppendage(); } + }, { + key: "getCSSAppendage", + value: function getCSSAppendage() { + var sourceMapURL = this.sourceMapURL; - if (extendsToAdd.length) { - // try to detect circular references to stop a stack overflow. - // may no longer be needed. - this.extendChainCount++; - if (iterationCount > 100) { - var selectorOne = '{unable to calculate}'; - var selectorTwo = '{unable to calculate}'; - try { - selectorOne = extendsToAdd[0].selfSelectors[0].toCSS(); - selectorTwo = extendsToAdd[0].selector.toCSS(); - } - catch (e) {} - throw { message: 'extend circular reference detected. One of the circular extends is currently:' + - selectorOne + ':extend(' + selectorTwo + ')'}; + if (this.options.sourceMapFileInline) { + if (this.sourceMap === undefined) { + return ''; } - // now process the new extends on the existing rules so that we can handle a extending b extending c extending - // d extending e... - return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1)); - } else { - return extendsToAdd; + sourceMapURL = "data:application/json;base64,".concat(environment.encodeBase64(this.sourceMap)); + } + + if (sourceMapURL) { + return "/*# sourceMappingURL=".concat(sourceMapURL, " */"); + } + + return ''; } - }, - visitDeclaration: function (ruleNode, visitArgs) { - visitArgs.visitDeeper = false; - }, - visitMixinDefinition: function (mixinDefinitionNode, visitArgs) { - visitArgs.visitDeeper = false; - }, - visitSelector: function (selectorNode, visitArgs) { - visitArgs.visitDeeper = false; - }, - visitRuleset: function (rulesetNode, visitArgs) { - if (rulesetNode.root) { - return; + }, { + key: "getExternalSourceMap", + value: function getExternalSourceMap() { + return this.sourceMap; + } + }, { + key: "setExternalSourceMap", + value: function setExternalSourceMap(sourceMap) { + this.sourceMap = sourceMap; + } + }, { + key: "isInline", + value: function isInline() { + return this.options.sourceMapFileInline; + } + }, { + key: "getSourceMapURL", + value: function getSourceMapURL() { + return this.sourceMapURL; + } + }, { + key: "getOutputFilename", + value: function getOutputFilename() { + return this.options.sourceMapOutputFilename; + } + }, { + key: "getInputFilename", + value: function getInputFilename() { + return this.sourceMapInputFilename; } - var matches, pathIndex, extendIndex, allExtends = this.allExtendsStack[this.allExtendsStack.length - 1], - selectorsToAdd = [], extendVisitor = this, selectorPath; + }]); - // look at each selector path in the ruleset, find any extend matches and then copy, find and replace + return SourceMapBuilder; + }(); - for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) { - for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) { - selectorPath = rulesetNode.paths[pathIndex]; + return SourceMapBuilder; + }); + + var transformTree = (function (root) { + var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {}; + var evaldRoot; + var variables = options.variables; + var evalEnv = new contexts.Eval(options); // + // Allows setting variables with a hash, so: + // + // `{ color: new tree.Color('#f01') }` will become: + // + // new tree.Declaration('@color', + // new tree.Value([ + // new tree.Expression([ + // new tree.Color('#f01') + // ]) + // ]) + // ) + // + + if (_typeof(variables) === 'object' && !Array.isArray(variables)) { + variables = Object.keys(variables).map(function (k) { + var value = variables[k]; + + if (!(value instanceof tree.Value)) { + if (!(value instanceof tree.Expression)) { + value = new tree.Expression([value]); + } + + value = new tree.Value([value]); + } + + return new tree.Declaration("@".concat(k), value, false, null, 0); + }); + evalEnv.frames = [new tree.Ruleset(null, variables)]; + } - // extending extends happens initially, before the main pass - if (rulesetNode.extendOnEveryPath) { continue; } - var extendList = selectorPath[selectorPath.length - 1].extendList; - if (extendList && extendList.length) { continue; } + var visitors$1 = [new visitors.JoinSelectorVisitor(), new visitors.MarkVisibleSelectorsVisitor(true), new visitors.ExtendVisitor(), new visitors.ToCSSVisitor({ + compress: Boolean(options.compress) + })]; + var preEvalVisitors = []; + var v; + var visitorIterator; + /** + * first() / get() allows visitors to be added while visiting + * + * @todo Add scoping for visitors just like functions for @plugin; right now they're global + */ - matches = this.findMatch(allExtends[extendIndex], selectorPath); + if (options.pluginManager) { + visitorIterator = options.pluginManager.visitor(); - if (matches.length) { - allExtends[extendIndex].hasFoundMatches = true; + for (var i = 0; i < 2; i++) { + visitorIterator.first(); - allExtends[extendIndex].selfSelectors.forEach(function(selfSelector) { - var extendedSelectors; - extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible()); - selectorsToAdd.push(extendedSelectors); - }); - } + while (v = visitorIterator.get()) { + if (v.isPreEvalVisitor) { + if (i === 0 || preEvalVisitors.indexOf(v) === -1) { + preEvalVisitors.push(v); + v.run(root); + } + } else { + if (i === 0 || visitors$1.indexOf(v) === -1) { + if (v.isPreVisitor) { + visitors$1.unshift(v); + } else { + visitors$1.push(v); + } } + } } - rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd); - }, - findMatch: function (extend, haystackSelectorPath) { - // - // look through the haystack selector path to try and find the needle - extend.selector - // returns an array of selector matches that can then be replaced - // - var haystackSelectorIndex, hackstackSelector, hackstackElementIndex, haystackElement, - targetCombinator, i, - extendVisitor = this, - needleElements = extend.selector.elements, - potentialMatches = [], potentialMatch, matches = []; + } + } - // loop through the haystack elements - for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) { - hackstackSelector = haystackSelectorPath[haystackSelectorIndex]; + evaldRoot = root.eval(evalEnv); - for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) { + for (var i = 0; i < visitors$1.length; i++) { + visitors$1[i].run(evaldRoot); + } // Run any remaining visitors added after eval pass - haystackElement = hackstackSelector.elements[hackstackElementIndex]; - // if we allow elements before our match we can add a potential match every time. otherwise only at the first element. - if (extend.allowBefore || (haystackSelectorIndex === 0 && hackstackElementIndex === 0)) { - potentialMatches.push({pathIndex: haystackSelectorIndex, index: hackstackElementIndex, matched: 0, - initialCombinator: haystackElement.combinator}); - } + if (options.pluginManager) { + visitorIterator.first(); - for (i = 0; i < potentialMatches.length; i++) { - potentialMatch = potentialMatches[i]; + while (v = visitorIterator.get()) { + if (visitors$1.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) { + v.run(evaldRoot); + } + } + } - // selectors add " " onto the first element. When we use & it joins the selectors together, but if we don't - // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to - // work out what the resulting combinator will be - targetCombinator = haystackElement.combinator.value; - if (targetCombinator === '' && hackstackElementIndex === 0) { - targetCombinator = ' '; - } + return evaldRoot; + }); - // if we don't match, null our match to indicate failure - if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) || - (potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator)) { - potentialMatch = null; - } else { - potentialMatch.matched++; - } + var parseTree = (function (SourceMapBuilder) { + var ParseTree = + /*#__PURE__*/ + function () { + function ParseTree(root, imports) { + _classCallCheck(this, ParseTree); - // if we are still valid and have finished, test whether we have elements after and whether these are allowed - if (potentialMatch) { - potentialMatch.finished = potentialMatch.matched === needleElements.length; - if (potentialMatch.finished && - (!extend.allowAfter && - (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length))) { - potentialMatch = null; - } - } - // if null we remove, if not, we are still valid, so either push as a valid match or continue - if (potentialMatch) { - if (potentialMatch.finished) { - potentialMatch.length = needleElements.length; - potentialMatch.endPathIndex = haystackSelectorIndex; - potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match - potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again - matches.push(potentialMatch); - } - } else { - potentialMatches.splice(i, 1); - i--; - } - } - } - } - return matches; - }, - isElementValuesEqual: function(elementValue1, elementValue2) { - if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') { - return elementValue1 === elementValue2; - } - if (elementValue1 instanceof tree.Attribute) { - if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) { - return false; - } - if (!elementValue1.value || !elementValue2.value) { - if (elementValue1.value || elementValue2.value) { - return false; - } - return true; - } - elementValue1 = elementValue1.value.value || elementValue1.value; - elementValue2 = elementValue2.value.value || elementValue2.value; - return elementValue1 === elementValue2; - } - elementValue1 = elementValue1.value; - elementValue2 = elementValue2.value; - if (elementValue1 instanceof tree.Selector) { - if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) { - return false; - } - for (var i = 0; i < elementValue1.elements.length; i++) { - if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) { - if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) { - return false; - } - } - if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) { - return false; - } - } - return true; - } - return false; - }, - extendSelector:function (matches, selectorPath, replacementSelector, isVisible) { + this.root = root; + this.imports = imports; + } - // for a set of matches, replace each match with the replacement selector + _createClass(ParseTree, [{ + key: "toCSS", + value: function toCSS(options) { + var evaldRoot; + var result = {}; + var sourceMapBuilder; - var currentSelectorPathIndex = 0, - currentSelectorPathElementIndex = 0, - path = [], - matchIndex, - selector, - firstElement, - match, - newElements; + try { + evaldRoot = transformTree(this.root, options); + } catch (e) { + throw new LessError(e, this.imports); + } - for (matchIndex = 0; matchIndex < matches.length; matchIndex++) { - match = matches[matchIndex]; - selector = selectorPath[match.pathIndex]; - firstElement = new tree.Element( - match.initialCombinator, - replacementSelector.elements[0].value, - replacementSelector.elements[0].isVariable, - replacementSelector.elements[0].getIndex(), - replacementSelector.elements[0].fileInfo() - ); - - if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) { - path[path.length - 1].elements = path[path.length - 1] - .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex)); - currentSelectorPathElementIndex = 0; - currentSelectorPathIndex++; - } - - newElements = selector.elements - .slice(currentSelectorPathElementIndex, match.index) - .concat([firstElement]) - .concat(replacementSelector.elements.slice(1)); - - if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) { - path[path.length - 1].elements = - path[path.length - 1].elements.concat(newElements); - } else { - path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex)); + try { + var compress = Boolean(options.compress); - path.push(new tree.Selector( - newElements - )); - } - currentSelectorPathIndex = match.endPathIndex; - currentSelectorPathElementIndex = match.endPathElementIndex; - if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) { - currentSelectorPathElementIndex = 0; - currentSelectorPathIndex++; + if (compress) { + logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); } - } - if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) { - path[path.length - 1].elements = path[path.length - 1] - .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex)); - currentSelectorPathIndex++; - } + var toCSSOptions = { + compress: compress, + dumpLineNumbers: options.dumpLineNumbers, + strictUnits: Boolean(options.strictUnits), + numPrecision: 8 + }; - path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length)); - path = path.map(function (currentValue) { - // we can re-use elements here, because the visibility property matters only for selectors - var derived = currentValue.createDerived(currentValue.elements); - if (isVisible) { - derived.ensureVisibility(); + if (options.sourceMap) { + sourceMapBuilder = new SourceMapBuilder(options.sourceMap); + result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports); } else { - derived.ensureInvisibility(); + result.css = evaldRoot.toCSS(toCSSOptions); } - return derived; - }); - return path; - }, - visitMedia: function (mediaNode, visitArgs) { - var newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); - newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends)); - this.allExtendsStack.push(newAllExtends); - }, - visitMediaOut: function (mediaNode) { - var lastIndex = this.allExtendsStack.length - 1; - this.allExtendsStack.length = lastIndex; - }, - visitAtRule: function (atRuleNode, visitArgs) { - var newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); - newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends)); - this.allExtendsStack.push(newAllExtends); - }, - visitAtRuleOut: function (atRuleNode) { - var lastIndex = this.allExtendsStack.length - 1; - this.allExtendsStack.length = lastIndex; - } -}; + } catch (e) { + throw new LessError(e, this.imports); + } -module.exports = ProcessExtendsVisitor; + if (options.pluginManager) { + var postProcessors = options.pluginManager.getPostProcessors(); -},{"../logger":39,"../tree":67,"../utils":89,"./visitor":97}],91:[function(require,module,exports){ -function ImportSequencer(onSequencerEmpty) { - this.imports = []; - this.variableImports = []; - this._onSequencerEmpty = onSequencerEmpty; - this._currentDepth = 0; -} + for (var i = 0; i < postProcessors.length; i++) { + result.css = postProcessors[i].process(result.css, { + sourceMap: sourceMapBuilder, + options: options, + imports: this.imports + }); + } + } -ImportSequencer.prototype.addImport = function(callback) { - var importSequencer = this, - importItem = { - callback: callback, - args: null, - isReady: false - }; - this.imports.push(importItem); - return function() { - importItem.args = Array.prototype.slice.call(arguments, 0); - importItem.isReady = true; - importSequencer.tryRun(); - }; -}; + if (options.sourceMap) { + result.map = sourceMapBuilder.getExternalSourceMap(); + } -ImportSequencer.prototype.addVariableImport = function(callback) { - this.variableImports.push(callback); -}; + result.imports = []; -ImportSequencer.prototype.tryRun = function() { - this._currentDepth++; - try { - while (true) { - while (this.imports.length > 0) { - var importItem = this.imports[0]; - if (!importItem.isReady) { - return; - } - this.imports = this.imports.slice(1); - importItem.callback.apply(null, importItem.args); - } - if (this.variableImports.length === 0) { - break; + for (var file in this.imports.files) { + if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) { + result.imports.push(file); } - var variableImport = this.variableImports[0]; - this.variableImports = this.variableImports.slice(1); - variableImport(); + } + + return result; } - } finally { - this._currentDepth--; - } - if (this._currentDepth === 0 && this._onSequencerEmpty) { - this._onSequencerEmpty(); - } -}; + }]); + + return ParseTree; + }(); -module.exports = ImportSequencer; + return ParseTree; + }); + + var importManager = (function (environment) { + // FileInfo = { + // 'rewriteUrls' - option - whether to adjust URL's to be relative + // 'filename' - full resolved filename of current file + // 'rootpath' - path to append to normal URLs for this node + // 'currentDirectory' - path to the current file, absolute + // 'rootFilename' - filename of the base file + // 'entryPath' - absolute path to the entry file + // 'reference' - whether the file should not be output and only output parts that are referenced + var ImportManager = + /*#__PURE__*/ + function () { + function ImportManager(less, context, rootFileInfo) { + _classCallCheck(this, ImportManager); -},{}],92:[function(require,module,exports){ -var contexts = require('../contexts'), - Visitor = require('./visitor'), - ImportSequencer = require('./import-sequencer'), - utils = require('../utils'); + this.less = less; + this.rootFilename = rootFileInfo.filename; + this.paths = context.paths || []; // Search paths, when importing -var ImportVisitor = function(importer, finish) { + this.contents = {}; // map - filename to contents of all the files - this._visitor = new Visitor(this); - this._importer = importer; - this._finish = finish; - this.context = new contexts.Eval(); - this.importCount = 0; - this.onceFileDetectionMap = {}; - this.recursionDetector = {}; - this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this)); -}; + this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore -ImportVisitor.prototype = { - isReplacing: false, - run: function (root) { - try { - // process the contents - this._visitor.visit(root); - } - catch (e) { - this.error = e; - } + this.mime = context.mime; + this.error = null; + this.context = context; // Deprecated? Unused outside of here, could be useful. - this.isFinished = true; - this._sequencer.tryRun(); - }, - _onSequencerEmpty: function() { - if (!this.isFinished) { - return; - } - this._finish(this.error); - }, - visitImport: function (importNode, visitArgs) { - var inlineCSS = importNode.options.inline; + this.queue = []; // Files which haven't been imported yet - if (!importNode.css || inlineCSS) { + this.files = {}; // Holds the imported parse trees. + } + /** + * Add an import to be imported + * @param path - the raw path + * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension) + * @param currentFileInfo - the current file info (used for instance to work out relative paths) + * @param importOptions - import options + * @param callback - callback for when it is imported + */ + + + _createClass(ImportManager, [{ + key: "push", + value: function push(path, tryAppendExtension, currentFileInfo, importOptions, callback) { + var importManager = this; + var pluginLoader = this.context.pluginManager.Loader; + this.queue.push(path); + + var fileParsedFunc = function fileParsedFunc(e, root, fullPath) { + importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue - var context = new contexts.Eval(this.context, utils.copyArray(this.context.frames)); - var importParent = context.frames[0]; + var importedEqualsRoot = fullPath === importManager.rootFilename; - this.importCount++; - if (importNode.isVariableImport()) { - this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent)); + if (importOptions.optional && e) { + callback(null, { + rules: [] + }, false, null); + logger.info("The file ".concat(fullPath, " was skipped because it was not found and the import was marked optional.")); } else { - this.processImportNode(importNode, context, importParent); + // Inline imports aren't cached here. + // If we start to cache them, please make sure they won't conflict with non-inline imports of the + // same name as they used to do before this comment and the condition below have been added. + if (!importManager.files[fullPath] && !importOptions.inline) { + importManager.files[fullPath] = { + root: root, + options: importOptions + }; + } + + if (e && !importManager.error) { + importManager.error = e; + } + + callback(e, root, importedEqualsRoot, fullPath); } - } - visitArgs.visitDeeper = false; - }, - processImportNode: function(importNode, context, importParent) { - var evaldImportNode, - inlineCSS = importNode.options.inline; + }; - try { - evaldImportNode = importNode.evalForImport(context); - } catch (e) { - if (!e.filename) { e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename; } - // attempt to eval properly and treat as css - importNode.css = true; - // if that fails, this error will be thrown - importNode.error = e; - } + var newFileInfo = { + rewriteUrls: this.context.rewriteUrls, + entryPath: currentFileInfo.entryPath, + rootpath: currentFileInfo.rootpath, + rootFilename: currentFileInfo.rootFilename + }; + var fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment); + + if (!fileManager) { + fileParsedFunc({ + message: "Could not find a file-manager for ".concat(path) + }); + return; + } - if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) { + var loadFileCallback = function loadFileCallback(loadedFile) { + var plugin; + var resolvedFilename = loadedFile.filename; + var contents = loadedFile.contents.replace(/^\uFEFF/, ''); // Pass on an updated rootpath if path of imported file is relative and file + // is in a (sub|sup) directory + // + // Examples: + // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/', + // then rootpath should become 'less/module/nav/' + // - If path of imported file is '../mixins.less' and rootpath is 'less/', + // then rootpath should become 'less/../' - if (evaldImportNode.options.multiple) { - context.importMultiple = true; - } + newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename); - // try appending if we haven't determined if it is css or not - var tryAppendLessExtension = evaldImportNode.css === undefined; + if (newFileInfo.rewriteUrls) { + newFileInfo.rootpath = fileManager.join(importManager.context.rootpath || '', fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath)); - for (var i = 0; i < importParent.rules.length; i++) { - if (importParent.rules[i] === importNode) { - importParent.rules[i] = evaldImportNode; - break; - } + if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) { + newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath); + } } - var onImported = this.onImported.bind(this, evaldImportNode, context), - sequencedOnImported = this._sequencer.addImport(onImported); + newFileInfo.filename = resolvedFilename; + var newEnv = new contexts.Parse(importManager.context); + newEnv.processImports = false; + importManager.contents[resolvedFilename] = contents; - this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(), - evaldImportNode.options, sequencedOnImported); - } else { - this.importCount--; - if (this.isFinished) { - this._sequencer.tryRun(); - } - } - }, - onImported: function (importNode, context, e, root, importedAtRoot, fullPath) { - if (e) { - if (!e.filename) { - e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename; + if (currentFileInfo.reference || importOptions.reference) { + newFileInfo.reference = true; } - this.error = e; - } - var importVisitor = this, - inlineCSS = importNode.options.inline, - isPlugin = importNode.options.isPlugin, - isOptional = importNode.options.optional, - duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector; + if (importOptions.isPlugin) { + plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo); - if (!context.importMultiple) { - if (duplicateImport) { - importNode.skip = true; + if (plugin instanceof LessError) { + fileParsedFunc(plugin, null, resolvedFilename); + } else { + fileParsedFunc(null, plugin, resolvedFilename); + } + } else if (importOptions.inline) { + fileParsedFunc(null, contents, resolvedFilename); } else { - importNode.skip = function() { - if (fullPath in importVisitor.onceFileDetectionMap) { - return true; - } - importVisitor.onceFileDetectionMap[fullPath] = true; - return false; - }; + // import (multiple) parse trees apparently get altered and can't be cached. + // TODO: investigate why this is + if (importManager.files[resolvedFilename] && !importManager.files[resolvedFilename].options.multiple && !importOptions.multiple) { + fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename); + } else { + new Parser(newEnv, importManager, newFileInfo).parse(contents, function (e, root) { + fileParsedFunc(e, root, resolvedFilename); + }); + } } - } + }; - if (!fullPath && isOptional) { - importNode.skip = true; + var promise; + var context = clone(this.context); + + if (tryAppendExtension) { + context.ext = importOptions.isPlugin ? '.js' : '.less'; + } + + if (importOptions.isPlugin) { + context.mime = 'application/javascript'; + promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager); + } else { + promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment, function (err, loadedFile) { + if (err) { + fileParsedFunc(err); + } else { + loadFileCallback(loadedFile); + } + }); + } + + if (promise) { + promise.then(loadFileCallback, fileParsedFunc); + } } + }]); - if (root) { - importNode.root = root; - importNode.importedFilename = fullPath; + return ImportManager; + }(); - if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) { - importVisitor.recursionDetector[fullPath] = true; + return ImportManager; + }); - var oldContext = this.context; - this.context = context; - try { - this._visitor.visit(root); - } catch (e) { - this.error = e; - } - this.context = oldContext; + var Render = (function (environment, ParseTree, ImportManager) { + var render = function render(input, options, callback) { + if (typeof options === 'function') { + callback = options; + options = copyOptions(this.options, {}); + } else { + options = copyOptions(this.options, options || {}); + } + + if (!callback) { + var self = this; + return new Promise(function (resolve, reject) { + render.call(self, input, options, function (err, output) { + if (err) { + reject(err); + } else { + resolve(output); } - } + }); + }); + } else { + this.parse(input, options, function (err, root, imports, options) { + if (err) { + return callback(err); + } - importVisitor.importCount--; + var result; - if (importVisitor.isFinished) { - importVisitor._sequencer.tryRun(); - } - }, - visitDeclaration: function (declNode, visitArgs) { - if (declNode.value.type === 'DetachedRuleset') { - this.context.frames.unshift(declNode); - } else { - visitArgs.visitDeeper = false; - } - }, - visitDeclarationOut: function(declNode) { - if (declNode.value.type === 'DetachedRuleset') { - this.context.frames.shift(); - } - }, - visitAtRule: function (atRuleNode, visitArgs) { - this.context.frames.unshift(atRuleNode); - }, - visitAtRuleOut: function (atRuleNode) { - this.context.frames.shift(); - }, - visitMixinDefinition: function (mixinDefinitionNode, visitArgs) { - this.context.frames.unshift(mixinDefinitionNode); - }, - visitMixinDefinitionOut: function (mixinDefinitionNode) { - this.context.frames.shift(); - }, - visitRuleset: function (rulesetNode, visitArgs) { - this.context.frames.unshift(rulesetNode); - }, - visitRulesetOut: function (rulesetNode) { - this.context.frames.shift(); - }, - visitMedia: function (mediaNode, visitArgs) { - this.context.frames.unshift(mediaNode.rules[0]); - }, - visitMediaOut: function (mediaNode) { - this.context.frames.shift(); + try { + var parseTree = new ParseTree(root, imports); + result = parseTree.toCSS(options); + } catch (err) { + return callback(err); + } + + callback(null, result); + }); + } + }; + + return render; + }); + + /** + * Plugin Manager + */ + var PluginManager = + /*#__PURE__*/ + function () { + function PluginManager(less) { + _classCallCheck(this, PluginManager); + + this.less = less; + this.visitors = []; + this.preProcessors = []; + this.postProcessors = []; + this.installedPlugins = []; + this.fileManagers = []; + this.iterator = -1; + this.pluginCache = {}; + this.Loader = new less.PluginLoader(less); } -}; -module.exports = ImportVisitor; + /** + * Adds all the plugins in the array + * @param {Array} plugins + */ -},{"../contexts":13,"../utils":89,"./import-sequencer":91,"./visitor":97}],93:[function(require,module,exports){ -var visitors = { - Visitor: require('./visitor'), - ImportVisitor: require('./import-visitor'), - MarkVisibleSelectorsVisitor: require('./set-tree-visibility-visitor'), - ExtendVisitor: require('./extend-visitor'), - JoinSelectorVisitor: require('./join-selector-visitor'), - ToCSSVisitor: require('./to-css-visitor') -}; -module.exports = visitors; + _createClass(PluginManager, [{ + key: "addPlugins", + value: function addPlugins(plugins) { + if (plugins) { + for (var i = 0; i < plugins.length; i++) { + this.addPlugin(plugins[i]); + } + } + } + /** + * + * @param plugin + * @param {String} filename + */ -},{"./extend-visitor":90,"./import-visitor":92,"./join-selector-visitor":94,"./set-tree-visibility-visitor":95,"./to-css-visitor":96,"./visitor":97}],94:[function(require,module,exports){ -var Visitor = require('./visitor'); + }, { + key: "addPlugin", + value: function addPlugin(plugin, filename, functionRegistry) { + this.installedPlugins.push(plugin); -var JoinSelectorVisitor = function() { - this.contexts = [[]]; - this._visitor = new Visitor(this); -}; + if (filename) { + this.pluginCache[filename] = plugin; + } -JoinSelectorVisitor.prototype = { - run: function (root) { - return this._visitor.visit(root); - }, - visitDeclaration: function (declNode, visitArgs) { - visitArgs.visitDeeper = false; - }, - visitMixinDefinition: function (mixinDefinitionNode, visitArgs) { - visitArgs.visitDeeper = false; - }, + if (plugin.install) { + plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry); + } + } + /** + * + * @param filename + */ + + }, { + key: "get", + value: function get(filename) { + return this.pluginCache[filename]; + } + /** + * Adds a visitor. The visitor object has options on itself to determine + * when it should run. + * @param visitor + */ + + }, { + key: "addVisitor", + value: function addVisitor(visitor) { + this.visitors.push(visitor); + } + /** + * Adds a pre processor object + * @param {object} preProcessor + * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import + */ + + }, { + key: "addPreProcessor", + value: function addPreProcessor(preProcessor, priority) { + var indexToInsertAt; + + for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) { + if (this.preProcessors[indexToInsertAt].priority >= priority) { + break; + } + } - visitRuleset: function (rulesetNode, visitArgs) { - var context = this.contexts[this.contexts.length - 1], - paths = [], selectors; + this.preProcessors.splice(indexToInsertAt, 0, { + preProcessor: preProcessor, + priority: priority + }); + } + /** + * Adds a post processor object + * @param {object} postProcessor + * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression + */ + + }, { + key: "addPostProcessor", + value: function addPostProcessor(postProcessor, priority) { + var indexToInsertAt; + + for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) { + if (this.postProcessors[indexToInsertAt].priority >= priority) { + break; + } + } - this.contexts.push(paths); + this.postProcessors.splice(indexToInsertAt, 0, { + postProcessor: postProcessor, + priority: priority + }); + } + /** + * + * @param manager + */ + + }, { + key: "addFileManager", + value: function addFileManager(manager) { + this.fileManagers.push(manager); + } + /** + * + * @returns {Array} + * @private + */ - if (!rulesetNode.root) { - selectors = rulesetNode.selectors; - if (selectors) { - selectors = selectors.filter(function(selector) { return selector.getIsOutput(); }); - rulesetNode.selectors = selectors.length ? selectors : (selectors = null); - if (selectors) { rulesetNode.joinSelectors(paths, context, selectors); } - } - if (!selectors) { rulesetNode.rules = null; } - rulesetNode.paths = paths; + }, { + key: "getPreProcessors", + value: function getPreProcessors() { + var preProcessors = []; + + for (var i = 0; i < this.preProcessors.length; i++) { + preProcessors.push(this.preProcessors[i].preProcessor); } - }, - visitRulesetOut: function (rulesetNode) { - this.contexts.length = this.contexts.length - 1; - }, - visitMedia: function (mediaNode, visitArgs) { - var context = this.contexts[this.contexts.length - 1]; - mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia); - }, - visitAtRule: function (atRuleNode, visitArgs) { - var context = this.contexts[this.contexts.length - 1]; - if (atRuleNode.rules && atRuleNode.rules.length) { - atRuleNode.rules[0].root = (atRuleNode.isRooted || context.length === 0 || null); + + return preProcessors; + } + /** + * + * @returns {Array} + * @private + */ + + }, { + key: "getPostProcessors", + value: function getPostProcessors() { + var postProcessors = []; + + for (var i = 0; i < this.postProcessors.length; i++) { + postProcessors.push(this.postProcessors[i].postProcessor); } - } -}; -module.exports = JoinSelectorVisitor; + return postProcessors; + } + /** + * + * @returns {Array} + * @private + */ + + }, { + key: "getVisitors", + value: function getVisitors() { + return this.visitors; + } + }, { + key: "visitor", + value: function visitor() { + var self = this; + return { + first: function first() { + self.iterator = -1; + return self.visitors[self.iterator]; + }, + get: function get() { + self.iterator += 1; + return self.visitors[self.iterator]; + } + }; + } + /** + * + * @returns {Array} + * @private + */ + + }, { + key: "getFileManagers", + value: function getFileManagers() { + return this.fileManagers; + } + }]); -},{"./visitor":97}],95:[function(require,module,exports){ -var SetTreeVisibilityVisitor = function(visible) { - this.visible = visible; -}; -SetTreeVisibilityVisitor.prototype.run = function(root) { - this.visit(root); -}; -SetTreeVisibilityVisitor.prototype.visitArray = function(nodes) { - if (!nodes) { - return nodes; - } + return PluginManager; + }(); - var cnt = nodes.length, i; - for (i = 0; i < cnt; i++) { - this.visit(nodes[i]); - } - return nodes; -}; -SetTreeVisibilityVisitor.prototype.visit = function(node) { - if (!node) { - return node; - } - if (node.constructor === Array) { - return this.visitArray(node); - } + var pm; - if (!node.blocksVisibility || node.blocksVisibility()) { - return node; - } - if (this.visible) { - node.ensureVisibility(); - } else { - node.ensureInvisibility(); + var PluginManagerFactory = function PluginManagerFactory(less, newFactory) { + if (newFactory || !pm) { + pm = new PluginManager(less); } - node.accept(this); - return node; -}; -module.exports = SetTreeVisibilityVisitor; -},{}],96:[function(require,module,exports){ -var tree = require('../tree'), - Visitor = require('./visitor'); + return pm; + }; // -var CSSVisitorUtils = function(context) { - this._visitor = new Visitor(this); - this._context = context; -}; + var Parse = (function (environment, ParseTree, ImportManager) { + var parse = function parse(input, options, callback) { + if (typeof options === 'function') { + callback = options; + options = copyOptions(this.options, {}); + } else { + options = copyOptions(this.options, options || {}); + } -CSSVisitorUtils.prototype = { - containsSilentNonBlockedChild: function(bodyRules) { - var rule; - if (!bodyRules) { - return false; - } - for (var r = 0; r < bodyRules.length; r++) { - rule = bodyRules[r]; - if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) { - // the atrule contains something that was referenced (likely by extend) - // therefore it needs to be shown in output too - return true; + if (!callback) { + var self = this; + return new Promise(function (resolve, reject) { + parse.call(self, input, options, function (err, output) { + if (err) { + reject(err); + } else { + resolve(output); } + }); + }); + } else { + var context; + var rootFileInfo; + var pluginManager = new PluginManagerFactory(this, !options.reUsePluginManager); + options.pluginManager = pluginManager; + context = new contexts.Parse(options); + + if (options.rootFileInfo) { + rootFileInfo = options.rootFileInfo; + } else { + var filename = options.filename || 'input'; + var entryPath = filename.replace(/[^\/\\]*$/, ''); + rootFileInfo = { + filename: filename, + rewriteUrls: context.rewriteUrls, + rootpath: context.rootpath || '', + currentDirectory: entryPath, + entryPath: entryPath, + rootFilename: filename + }; // add in a missing trailing slash + + if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') { + rootFileInfo.rootpath += '/'; + } } - return false; - }, - keepOnlyVisibleChilds: function(owner) { - if (owner && owner.rules) { - owner.rules = owner.rules.filter(function(thing) { - return thing.isVisible(); - }); - } - }, + var imports = new ImportManager(this, context, rootFileInfo); + this.importManager = imports; // TODO: allow the plugins to be just a list of paths or names + // Do an async plugin queue like lessc - isEmpty: function(owner) { - return (owner && owner.rules) - ? (owner.rules.length === 0) : true; - }, + if (options.plugins) { + options.plugins.forEach(function (plugin) { + var evalResult; + var contents; - hasVisibleSelector: function(rulesetNode) { - return (rulesetNode && rulesetNode.paths) - ? (rulesetNode.paths.length > 0) : false; - }, + if (plugin.fileContent) { + contents = plugin.fileContent.replace(/^\uFEFF/, ''); + evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename); - resolveVisibility: function (node, originalRules) { - if (!node.blocksVisibility()) { - if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) { - return ; + if (evalResult instanceof LessError) { + return callback(evalResult); + } + } else { + pluginManager.addPlugin(plugin); } - - return node; + }); } - var compiledRulesBody = node.rules[0]; - this.keepOnlyVisibleChilds(compiledRulesBody); + new Parser(context, imports, rootFileInfo).parse(input, function (e, root) { + if (e) { + return callback(e); + } - if (this.isEmpty(compiledRulesBody)) { - return ; - } + callback(null, root, imports, options); + }, options); + } + }; - node.ensureVisibility(); - node.removeVisibilityBlock(); + return parse; + }); - return node; - }, + var lessRoot = (function (environment$1, fileManagers) { + var SourceMapOutput = sourceMapOutput(environment$1); + var SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment$1); + var ParseTree = parseTree(SourceMapBuilder); + var ImportManager = importManager(environment$1); + var render = Render(environment$1, ParseTree); + var parse = Parse(environment$1, ParseTree, ImportManager); + var environ = new environment(environment$1, fileManagers); + var functions = Functions(environment$1); + var initial = { + version: [3, 9, 0], + data: data, + tree: tree, + Environment: environment, + AbstractFileManager: abstractFileManager, + AbstractPluginLoader: AbstractPluginLoader, + environment: environ, + visitors: visitors, + Parser: Parser, + functions: functions, + contexts: contexts, + SourceMapOutput: SourceMapOutput, + SourceMapBuilder: SourceMapBuilder, + ParseTree: ParseTree, + ImportManager: ImportManager, + render: render, + parse: parse, + LessError: LessError, + transformTree: transformTree, + utils: utils$1, + PluginManager: PluginManagerFactory, + logger: logger + }; // Create a public API + + var ctor = function ctor(t) { + return function () { + var obj = Object.create(t.prototype); + + for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) { + args[_key] = arguments[_key]; + } + + t.apply(obj, Array.prototype.slice.call(args, 0)); + return obj; + }; + }; - isVisibleRuleset: function(rulesetNode) { - if (rulesetNode.firstRoot) { - return true; - } + var t; + var api = Object.create(initial); - if (this.isEmpty(rulesetNode)) { - return false; - } + for (var n in initial.tree) { + /* eslint guard-for-in: 0 */ + t = initial.tree[n]; - if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) { - return false; - } + if (typeof t === 'function') { + api[n.toLowerCase()] = ctor(t); + } else { + api[n] = Object.create(null); - return true; + for (var o in t) { + /* eslint guard-for-in: 0 */ + api[n][o.toLowerCase()] = ctor(t[o]); + } + } } -}; + return api; + }); -var ToCSSVisitor = function(context) { - this._visitor = new Visitor(this); - this._context = context; - this.utils = new CSSVisitorUtils(context); -}; + /* global window, XMLHttpRequest */ + var FM = (function (options, logger) { + var AbstractFileManager = require('../less/environment/abstract-file-manager.js'); -ToCSSVisitor.prototype = { - isReplacing: true, - run: function (root) { - return this._visitor.visit(root); - }, + var fileCache = {}; // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load - visitDeclaration: function (declNode, visitArgs) { - if (declNode.blocksVisibility() || declNode.variable) { - return; - } - return declNode; - }, + var FileManager = function FileManager() {}; - visitMixinDefinition: function (mixinNode, visitArgs) { - // mixin definitions do not get eval'd - this means they keep state - // so we have to clear that state here so it isn't used if toCSS is called twice - mixinNode.frames = []; - }, + FileManager.prototype = new AbstractFileManager(); - visitExtend: function (extendNode, visitArgs) { - }, + FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() { + return true; + }; - visitComment: function (commentNode, visitArgs) { - if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) { - return; - } - return commentNode; - }, + FileManager.prototype.join = function join(basePath, laterPath) { + if (!basePath) { + return laterPath; + } - visitMedia: function(mediaNode, visitArgs) { - var originalRules = mediaNode.rules[0].rules; - mediaNode.accept(this._visitor); - visitArgs.visitDeeper = false; + return this.extractUrlParts(laterPath, basePath).path; + }; - return this.utils.resolveVisibility(mediaNode, originalRules); - }, + FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) { + var xhr = new XMLHttpRequest(); + var async = options.isFileProtocol ? options.fileAsync : true; - visitImport: function (importNode, visitArgs) { - if (importNode.blocksVisibility()) { - return ; - } - return importNode; - }, + if (typeof xhr.overrideMimeType === 'function') { + xhr.overrideMimeType('text/css'); + } - visitAtRule: function(atRuleNode, visitArgs) { - if (atRuleNode.rules && atRuleNode.rules.length) { - return this.visitAtRuleWithBody(atRuleNode, visitArgs); - } else { - return this.visitAtRuleWithoutBody(atRuleNode, visitArgs); - } - }, + logger.debug("XHR: Getting '".concat(url, "'")); + xhr.open('GET', url, async); + xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5'); + xhr.send(null); - visitAnonymous: function(anonymousNode, visitArgs) { - if (!anonymousNode.blocksVisibility()) { - anonymousNode.accept(this._visitor); - return anonymousNode; + function handleResponse(xhr, callback, errback) { + if (xhr.status >= 200 && xhr.status < 300) { + callback(xhr.responseText, xhr.getResponseHeader('Last-Modified')); + } else if (typeof errback === 'function') { + errback(xhr.status, url); } - }, + } - visitAtRuleWithBody: function(atRuleNode, visitArgs) { - // if there is only one nested ruleset and that one has no path, then it is - // just fake ruleset - function hasFakeRuleset(atRuleNode) { - var bodyRules = atRuleNode.rules; - return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0); + if (options.isFileProtocol && !options.fileAsync) { + if (xhr.status === 0 || xhr.status >= 200 && xhr.status < 300) { + callback(xhr.responseText); + } else { + errback(xhr.status, url); } - function getBodyRules(atRuleNode) { - var nodeRules = atRuleNode.rules; - if (hasFakeRuleset(atRuleNode)) { - return nodeRules[0].rules; - } + } else if (async) { + xhr.onreadystatechange = function () { + if (xhr.readyState == 4) { + handleResponse(xhr, callback, errback); + } + }; + } else { + handleResponse(xhr, callback, errback); + } + }; - return nodeRules; - } - // it is still true that it is only one ruleset in array - // this is last such moment - // process childs - var originalRules = getBodyRules(atRuleNode); - atRuleNode.accept(this._visitor); - visitArgs.visitDeeper = false; + FileManager.prototype.supports = function (filename, currentDirectory, options, environment) { + return true; + }; - if (!this.utils.isEmpty(atRuleNode)) { - this._mergeRules(atRuleNode.rules[0].rules); - } + FileManager.prototype.clearFileCache = function () { + fileCache = {}; + }; - return this.utils.resolveVisibility(atRuleNode, originalRules); - }, + FileManager.prototype.loadFile = function loadFile(filename, currentDirectory, options, environment) { + // TODO: Add prefix support like less-node? + // What about multiple paths? + if (currentDirectory && !this.isPathAbsolute(filename)) { + filename = currentDirectory + filename; + } - visitAtRuleWithoutBody: function(atRuleNode, visitArgs) { - if (atRuleNode.blocksVisibility()) { - return; - } + filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename; + options = options || {}; // sheet may be set to the stylesheet for the initial load or a collection of properties including + // some context variables for imports - if (atRuleNode.name === '@charset') { - // Only output the debug info together with subsequent @charset definitions - // a comment (or @media statement) before the actual @charset atrule would - // be considered illegal css as it has to be on the first line - if (this.charset) { - if (atRuleNode.debugInfo) { - var comment = new tree.Comment('/* ' + atRuleNode.toCSS(this._context).replace(/\n/g, '') + ' */\n'); - comment.debugInfo = atRuleNode.debugInfo; - return this._visitor.visit(comment); - } - return; - } - this.charset = true; + var hrefParts = this.extractUrlParts(filename, window.location.href); + var href = hrefParts.url; + var self = this; + return new Promise(function (resolve, reject) { + if (options.useFileCache && fileCache[href]) { + try { + var lessText = fileCache[href]; + return resolve({ + contents: lessText, + filename: href, + webInfo: { + lastModified: new Date() + } + }); + } catch (e) { + return reject({ + filename: href, + message: "Error loading file ".concat(href, " error was ").concat(e.message) + }); + } } - return atRuleNode; - }, - - checkValidNodes: function(rules, isRoot) { - if (!rules) { - return; - } + self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) { + // per file cache + fileCache[href] = data; // Use remote copy (re-parse) - for (var i = 0; i < rules.length; i++) { - var ruleNode = rules[i]; - if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) { - throw { message: 'Properties must be inside selector blocks. They cannot be in the root', - index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename}; + resolve({ + contents: data, + filename: href, + webInfo: { + lastModified: lastModified } - if (ruleNode instanceof tree.Call) { - throw { message: 'Function \'' + ruleNode.name + '\' is undefined', - index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename}; - } - if (ruleNode.type && !ruleNode.allowRoot) { - throw { message: ruleNode.type + ' node returned by a function is not valid here', - index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename}; - } - } - }, + }); + }, function doXHRError(status, url) { + reject({ + type: 'File', + message: "'".concat(url, "' wasn't found (").concat(status, ")"), + href: href + }); + }); + }); + }; - visitRuleset: function (rulesetNode, visitArgs) { - // at this point rulesets are nested into each other - var rule, rulesets = []; + return FileManager; + }); - this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot); + /** + * Browser Plugin Loader + */ - if (!rulesetNode.root) { - // remove invisible paths - this._compileRulesetPaths(rulesetNode); - - // remove rulesets from this ruleset body and compile them separately - var nodeRules = rulesetNode.rules, nodeRuleCnt = nodeRules ? nodeRules.length : 0; - for (var i = 0; i < nodeRuleCnt; ) { - rule = nodeRules[i]; - if (rule && rule.rules) { - // visit because we are moving them out from being a child - rulesets.push(this._visitor.visit(rule)); - nodeRules.splice(i, 1); - nodeRuleCnt--; - continue; - } - i++; - } - // accept the visitor to remove rules and refactor itself - // then we can decide nogw whether we want it or not - // compile body - if (nodeRuleCnt > 0) { - rulesetNode.accept(this._visitor); - } else { - rulesetNode.rules = null; - } - visitArgs.visitDeeper = false; + var PluginLoader = + /*#__PURE__*/ + function (_AbstractPluginLoader) { + _inherits(PluginLoader, _AbstractPluginLoader); - } else { // if (! rulesetNode.root) { - rulesetNode.accept(this._visitor); - visitArgs.visitDeeper = false; - } + function PluginLoader(less) { + var _this; - if (rulesetNode.rules) { - this._mergeRules(rulesetNode.rules); - this._removeDuplicateRules(rulesetNode.rules); - } + _classCallCheck(this, PluginLoader); - // now decide whether we keep the ruleset - if (this.utils.isVisibleRuleset(rulesetNode)) { - rulesetNode.ensureVisibility(); - rulesets.splice(0, 0, rulesetNode); - } + _this.less = less; // Should we shim this.require for browser? Probably not? - if (rulesets.length === 1) { - return rulesets[0]; - } - return rulesets; - }, + return _possibleConstructorReturn(_this); + } - _compileRulesetPaths: function(rulesetNode) { - if (rulesetNode.paths) { - rulesetNode.paths = rulesetNode.paths - .filter(function(p) { - var i; - if (p[0].elements[0].combinator.value === ' ') { - p[0].elements[0].combinator = new(tree.Combinator)(''); - } - for (i = 0; i < p.length; i++) { - if (p[i].isVisible() && p[i].getIsOutput()) { - return true; - } - } - return false; - }); - } - }, + _createClass(PluginLoader, [{ + key: "loadPlugin", + value: function loadPlugin(filename, basePath, context, environment, fileManager) { + return new Promise(function (fulfill, reject) { + fileManager.loadFile(filename, basePath, context, environment).then(fulfill)["catch"](reject); + }); + } + }]); - _removeDuplicateRules: function(rules) { - if (!rules) { return; } + return PluginLoader; + }(AbstractPluginLoader); - // remove duplicates - var ruleCache = {}, - ruleList, rule, i; + var LogListener = (function (less, options) { + var logLevel_debug = 4; + var logLevel_info = 3; + var logLevel_warn = 2; + var logLevel_error = 1; // The amount of logging in the javascript console. + // 3 - Debug, information and errors + // 2 - Information and errors + // 1 - Errors + // 0 - None + // Defaults to 2 - for (i = rules.length - 1; i >= 0 ; i--) { - rule = rules[i]; - if (rule instanceof tree.Declaration) { - if (!ruleCache[rule.name]) { - ruleCache[rule.name] = rule; - } else { - ruleList = ruleCache[rule.name]; - if (ruleList instanceof tree.Declaration) { - ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)]; - } - var ruleCSS = rule.toCSS(this._context); - if (ruleList.indexOf(ruleCSS) !== -1) { - rules.splice(i, 1); - } else { - ruleList.push(ruleCSS); - } - } - } + options.logLevel = typeof options.logLevel !== 'undefined' ? options.logLevel : options.env === 'development' ? logLevel_info : logLevel_error; + + if (!options.loggers) { + options.loggers = [{ + debug: function debug(msg) { + if (options.logLevel >= logLevel_debug) { + console.log(msg); + } + }, + info: function info(msg) { + if (options.logLevel >= logLevel_info) { + console.log(msg); + } + }, + warn: function warn(msg) { + if (options.logLevel >= logLevel_warn) { + console.warn(msg); + } + }, + error: function error(msg) { + if (options.logLevel >= logLevel_error) { + console.error(msg); + } } - }, + }]; + } - _mergeRules: function(rules) { - if (!rules) { - return; - } - - var groups = {}, - groupsArr = []; - - for (var i = 0; i < rules.length; i++) { - var rule = rules[i]; - if (rule.merge) { - var key = rule.name; - groups[key] ? rules.splice(i--, 1) : - groupsArr.push(groups[key] = []); - groups[key].push(rule); - } - } - - groupsArr.forEach(function(group) { - if (group.length > 0) { - var result = group[0], - space = [], - comma = [new tree.Expression(space)]; - group.forEach(function(rule) { - if ((rule.merge === '+') && (space.length > 0)) { - comma.push(new tree.Expression(space = [])); - } - space.push(rule.value); - result.important = result.important || rule.important; - }); - result.value = new tree.Value(comma); - } - }); + for (var i = 0; i < options.loggers.length; i++) { + less.logger.addListener(options.loggers[i]); } -}; + }); + + var ErrorReporting = (function (window, less, options) { + function errorHTML(e, rootHref) { + var id = "less-error-message:".concat(extractId(rootHref || '')); + var template = '
  • {content}
    • '; + var elem = window.document.createElement('div'); + var timer; + var content; + var errors = []; + var filename = e.filename || rootHref; + var filenameNoPath = filename.match(/([^\/]+(\?.*)?)$/)[1]; + elem.id = id; + elem.className = 'less-error-message'; + content = "

    ".concat(e.type || 'Syntax', "Error: ").concat(e.message || 'There is an error in your .less file', "

    in ").concat(filenameNoPath, " "); + + var errorline = function errorline(e, i, classname) { + if (e.extract[i] !== undefined) { + errors.push(template.replace(/\{line\}/, (parseInt(e.line, 10) || 0) + (i - 1)).replace(/\{class\}/, classname).replace(/\{content\}/, e.extract[i])); + } + }; + + if (e.line) { + errorline(e, 0, ''); + errorline(e, 1, 'line'); + errorline(e, 2, ''); + content += "on line ".concat(e.line, ", column ").concat(e.column + 1, ":

      ").concat(errors.join(''), "
    "); + } -module.exports = ToCSSVisitor; + if (e.stack && (e.extract || options.logLevel >= 4)) { + content += "
    Stack Trace
    ".concat(e.stack.split('\n').slice(1).join('
    ')); + } -},{"../tree":67,"./visitor":97}],97:[function(require,module,exports){ -var tree = require('../tree'); + elem.innerHTML = content; // CSS for error messages -var _visitArgs = { visitDeeper: true }, - _hasIndexed = false; + browser.createCSS(window.document, ['.less-error-message ul, .less-error-message li {', 'list-style-type: none;', 'margin-right: 15px;', 'padding: 4px 0;', 'margin: 0;', '}', '.less-error-message label {', 'font-size: 12px;', 'margin-right: 15px;', 'padding: 4px 0;', 'color: #cc7777;', '}', '.less-error-message pre {', 'color: #dd6666;', 'padding: 4px 0;', 'margin: 0;', 'display: inline-block;', '}', '.less-error-message pre.line {', 'color: #ff0000;', '}', '.less-error-message h3 {', 'font-size: 20px;', 'font-weight: bold;', 'padding: 15px 0 5px 0;', 'margin: 0;', '}', '.less-error-message a {', 'color: #10a', '}', '.less-error-message .error {', 'color: red;', 'font-weight: bold;', 'padding-bottom: 2px;', 'border-bottom: 1px dashed red;', '}'].join('\n'), { + title: 'error-message' + }); + elem.style.cssText = ['font-family: Arial, sans-serif', 'border: 1px solid #e00', 'background-color: #eee', 'border-radius: 5px', '-webkit-border-radius: 5px', '-moz-border-radius: 5px', 'color: #e00', 'padding: 15px', 'margin-bottom: 15px'].join(';'); -function _noop(node) { - return node; -} + if (options.env === 'development') { + timer = setInterval(function () { + var document = window.document; + var body = document.body; -function indexNodeTypes(parent, ticker) { - // add .typeIndex to tree node types for lookup table - var key, child; - for (key in parent) { - /* eslint guard-for-in: 0 */ - child = parent[key]; - switch (typeof child) { - case 'function': - // ignore bound functions directly on tree which do not have a prototype - // or aren't nodes - if (child.prototype && child.prototype.type) { - child.prototype.typeIndex = ticker++; - } - break; - case 'object': - ticker = indexNodeTypes(child, ticker); - break; - - } + if (body) { + if (document.getElementById(id)) { + body.replaceChild(elem, document.getElementById(id)); + } else { + body.insertBefore(elem, body.firstChild); + } + + clearInterval(timer); + } + }, 10); + } } - return ticker; -} -var Visitor = function(implementation) { - this._implementation = implementation; - this._visitInCache = {}; - this._visitOutCache = {}; + function removeErrorHTML(path) { + var node = window.document.getElementById("less-error-message:".concat(extractId(path))); - if (!_hasIndexed) { - indexNodeTypes(tree, 1); - _hasIndexed = true; + if (node) { + node.parentNode.removeChild(node); + } } -}; -Visitor.prototype = { - visit: function(node) { - if (!node) { - return node; - } + function removeError(path) { + if (!options.errorReporting || options.errorReporting === 'html') { + removeErrorHTML(path); + } else if (options.errorReporting === 'console') ; else if (typeof options.errorReporting === 'function') { + options.errorReporting('remove', path); + } + } - var nodeTypeIndex = node.typeIndex; - if (!nodeTypeIndex) { - // MixinCall args aren't a node type? - if (node.value && node.value.typeIndex) { - this.visit(node.value); - } - return node; - } + function errorConsole(e, rootHref) { + var template = '{line} {content}'; + var filename = e.filename || rootHref; + var errors = []; + var content = "".concat(e.type || 'Syntax', "Error: ").concat(e.message || 'There is an error in your .less file', " in ").concat(filename); + + var errorline = function errorline(e, i, classname) { + if (e.extract[i] !== undefined) { + errors.push(template.replace(/\{line\}/, (parseInt(e.line, 10) || 0) + (i - 1)).replace(/\{class\}/, classname).replace(/\{content\}/, e.extract[i])); + } + }; + + if (e.line) { + errorline(e, 0, ''); + errorline(e, 1, 'line'); + errorline(e, 2, ''); + content += " on line ".concat(e.line, ", column ").concat(e.column + 1, ":\n").concat(errors.join('\n')); + } - var impl = this._implementation, - func = this._visitInCache[nodeTypeIndex], - funcOut = this._visitOutCache[nodeTypeIndex], - visitArgs = _visitArgs, - fnName; + if (e.stack && (e.extract || options.logLevel >= 4)) { + content += "\nStack Trace\n".concat(e.stack); + } - visitArgs.visitDeeper = true; + less.logger.error(content); + } - if (!func) { - fnName = 'visit' + node.type; - func = impl[fnName] || _noop; - funcOut = impl[fnName + 'Out'] || _noop; - this._visitInCache[nodeTypeIndex] = func; - this._visitOutCache[nodeTypeIndex] = funcOut; - } + function error(e, rootHref) { + if (!options.errorReporting || options.errorReporting === 'html') { + errorHTML(e, rootHref); + } else if (options.errorReporting === 'console') { + errorConsole(e, rootHref); + } else if (typeof options.errorReporting === 'function') { + options.errorReporting('add', e, rootHref); + } + } - if (func !== _noop) { - var newNode = func.call(impl, node, visitArgs); - if (node && impl.isReplacing) { - node = newNode; - } - } + return { + add: error, + remove: removeError + }; + }); - if (visitArgs.visitDeeper && node && node.accept) { - node.accept(this); - } + // Cache system is a bit outdated and could do with work + var Cache = (function (window, options, logger) { + var cache = null; - if (funcOut != _noop) { - funcOut.call(impl, node); - } + if (options.env !== 'development') { + try { + cache = typeof window.localStorage === 'undefined' ? null : window.localStorage; + } catch (_) {} + } - return node; - }, - visitArray: function(nodes, nonReplacing) { - if (!nodes) { - return nodes; - } + return { + setCSS: function setCSS(path, lastModified, modifyVars, styles) { + if (cache) { + logger.info("saving ".concat(path, " to cache.")); - var cnt = nodes.length, i; + try { + cache.setItem(path, styles); + cache.setItem("".concat(path, ":timestamp"), lastModified); - // Non-replacing - if (nonReplacing || !this._implementation.isReplacing) { - for (i = 0; i < cnt; i++) { - this.visit(nodes[i]); + if (modifyVars) { + cache.setItem("".concat(path, ":vars"), JSON.stringify(modifyVars)); } - return nodes; + } catch (e) { + // TODO - could do with adding more robust error handling + logger.error("failed to save \"".concat(path, "\" to local storage for caching.")); + } } + }, + getCSS: function getCSS(path, webInfo, modifyVars) { + var css = cache && cache.getItem(path); + var timestamp = cache && cache.getItem("".concat(path, ":timestamp")); + var vars = cache && cache.getItem("".concat(path, ":vars")); + modifyVars = modifyVars || {}; + vars = vars || "{}"; // if not set, treat as the JSON representation of an empty object - // Replacing - var out = []; - for (i = 0; i < cnt; i++) { - var evald = this.visit(nodes[i]); - if (evald === undefined) { continue; } - if (!evald.splice) { - out.push(evald); - } else if (evald.length) { - this.flatten(evald, out); - } - } - return out; - }, - flatten: function(arr, out) { - if (!out) { - out = []; + if (timestamp && webInfo.lastModified && new Date(webInfo.lastModified).valueOf() === new Date(timestamp).valueOf() && JSON.stringify(modifyVars) === vars) { + // Use local copy + return css; } + } + }; + }); - var cnt, i, item, - nestedCnt, j, nestedItem; + var ImageSize = (function () { + function _imageSize() { + throw { + type: 'Runtime', + message: 'Image size functions are not supported in browser version of less' + }; + } - for (i = 0, cnt = arr.length; i < cnt; i++) { - item = arr[i]; - if (item === undefined) { - continue; - } - if (!item.splice) { - out.push(item); - continue; - } + var imageFunctions = { + 'image-size': function imageSize(filePathNode) { + _imageSize(); - for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) { - nestedItem = item[j]; - if (nestedItem === undefined) { - continue; - } - if (!nestedItem.splice) { - out.push(nestedItem); - } else if (nestedItem.length) { - this.flatten(nestedItem, out); - } - } - } + return -1; + }, + 'image-width': function imageWidth(filePathNode) { + _imageSize(); - return out; - } -}; -module.exports = Visitor; - -},{"../tree":67}],98:[function(require,module,exports){ -"use strict"; - -// rawAsap provides everything we need except exception management. -var rawAsap = require("./raw"); -// RawTasks are recycled to reduce GC churn. -var freeTasks = []; -// We queue errors to ensure they are thrown in right order (FIFO). -// Array-as-queue is good enough here, since we are just dealing with exceptions. -var pendingErrors = []; -var requestErrorThrow = rawAsap.makeRequestCallFromTimer(throwFirstError); - -function throwFirstError() { - if (pendingErrors.length) { - throw pendingErrors.shift(); - } -} - -/** - * Calls a task as soon as possible after returning, in its own event, with priority - * over other events like animation, reflow, and repaint. An error thrown from an - * event will not interrupt, nor even substantially slow down the processing of - * other events, but will be rather postponed to a lower priority event. - * @param {{call}} task A callable object, typically a function that takes no - * arguments. - */ -module.exports = asap; -function asap(task) { - var rawTask; - if (freeTasks.length) { - rawTask = freeTasks.pop(); - } else { - rawTask = new RawTask(); + return -1; + }, + 'image-height': function imageHeight(filePathNode) { + _imageSize(); + + return -1; + } + }; + functionRegistry.addMultiple(imageFunctions); + }); + + // + var root = (function (window, options) { + var document = window.document; + var less = lessRoot(); + less.options = options; + var environment = less.environment; + var FileManager = FM(options, less.logger); + var fileManager = new FileManager(); + environment.addFileManager(fileManager); + less.FileManager = FileManager; + less.PluginLoader = PluginLoader; + LogListener(less, options); + var errors = ErrorReporting(window, less, options); + var cache = less.cache = options.cache || Cache(window, options, less.logger); + ImageSize(less.environment); // Setup user functions - Deprecate? + + if (options.functions) { + less.functions.functionRegistry.addMultiple(options.functions); } - rawTask.task = task; - rawAsap(rawTask); -} -// We wrap tasks with recyclable task objects. A task object implements -// `call`, just like a function. -function RawTask() { - this.task = null; -} + var typePattern = /^text\/(x-)?less$/; + + function clone(obj) { + var cloned = {}; -// The sole purpose of wrapping the task is to catch the exception and recycle -// the task object after its single use. -RawTask.prototype.call = function () { - try { - this.task.call(); - } catch (error) { - if (asap.onerror) { - // This hook exists purely for testing purposes. - // Its name will be periodically randomized to break any code that - // depends on its existence. - asap.onerror(error); - } else { - // In a web browser, exceptions are not fatal. However, to avoid - // slowing down the queue of pending tasks, we rethrow the error in a - // lower priority turn. - pendingErrors.push(error); - requestErrorThrow(); - } - } finally { - this.task = null; - freeTasks[freeTasks.length] = this; - } -}; - -},{"./raw":99}],99:[function(require,module,exports){ -(function (global){ -"use strict"; - -// Use the fastest means possible to execute a task in its own turn, with -// priority over other events including IO, animation, reflow, and redraw -// events in browsers. -// -// An exception thrown by a task will permanently interrupt the processing of -// subsequent tasks. The higher level `asap` function ensures that if an -// exception is thrown by a task, that the task queue will continue flushing as -// soon as possible, but if you use `rawAsap` directly, you are responsible to -// either ensure that no exceptions are thrown from your task, or to manually -// call `rawAsap.requestFlush` if an exception is thrown. -module.exports = rawAsap; -function rawAsap(task) { - if (!queue.length) { - requestFlush(); - flushing = true; - } - // Equivalent to push, but avoids a function call. - queue[queue.length] = task; -} - -var queue = []; -// Once a flush has been requested, no further calls to `requestFlush` are -// necessary until the next `flush` completes. -var flushing = false; -// `requestFlush` is an implementation-specific method that attempts to kick -// off a `flush` event as quickly as possible. `flush` will attempt to exhaust -// the event queue before yielding to the browser's own event loop. -var requestFlush; -// The position of the next task to execute in the task queue. This is -// preserved between calls to `flush` so that it can be resumed if -// a task throws an exception. -var index = 0; -// If a task schedules additional tasks recursively, the task queue can grow -// unbounded. To prevent memory exhaustion, the task queue will periodically -// truncate already-completed tasks. -var capacity = 1024; - -// The flush function processes all tasks that have been scheduled with -// `rawAsap` unless and until one of those tasks throws an exception. -// If a task throws an exception, `flush` ensures that its state will remain -// consistent and will resume where it left off when called again. -// However, `flush` does not make any arrangements to be called again if an -// exception is thrown. -function flush() { - while (index < queue.length) { - var currentIndex = index; - // Advance the index before calling the task. This ensures that we will - // begin flushing on the next task the task throws an error. - index = index + 1; - queue[currentIndex].call(); - // Prevent leaking memory for long chains of recursive calls to `asap`. - // If we call `asap` within tasks scheduled by `asap`, the queue will - // grow, but to avoid an O(n) walk for every task we execute, we don't - // shift tasks off the queue after they have been executed. - // Instead, we periodically shift 1024 tasks off the queue. - if (index > capacity) { - // Manually shift all values starting at the index back to the - // beginning of the queue. - for (var scan = 0, newLength = queue.length - index; scan < newLength; scan++) { - queue[scan] = queue[scan + index]; - } - queue.length -= index; - index = 0; - } - } - queue.length = 0; - index = 0; - flushing = false; -} - -// `requestFlush` is implemented using a strategy based on data collected from -// every available SauceLabs Selenium web driver worker at time of writing. -// https://docs.google.com/spreadsheets/d/1mG-5UYGup5qxGdEMWkhP6BWCz053NUb2E1QoUTU16uA/edit#gid=783724593 - -// Safari 6 and 6.1 for desktop, iPad, and iPhone are the only browsers that -// have WebKitMutationObserver but not un-prefixed MutationObserver. -// Must use `global` or `self` instead of `window` to work in both frames and web -// workers. `global` is a provision of Browserify, Mr, Mrs, or Mop. - -/* globals self */ -var scope = typeof global !== "undefined" ? global : self; -var BrowserMutationObserver = scope.MutationObserver || scope.WebKitMutationObserver; - -// MutationObservers are desirable because they have high priority and work -// reliably everywhere they are implemented. -// They are implemented in all modern browsers. -// -// - Android 4-4.3 -// - Chrome 26-34 -// - Firefox 14-29 -// - Internet Explorer 11 -// - iPad Safari 6-7.1 -// - iPhone Safari 7-7.1 -// - Safari 6-7 -if (typeof BrowserMutationObserver === "function") { - requestFlush = makeRequestCallFromMutationObserver(flush); - -// MessageChannels are desirable because they give direct access to the HTML -// task queue, are implemented in Internet Explorer 10, Safari 5.0-1, and Opera -// 11-12, and in web workers in many engines. -// Although message channels yield to any queued rendering and IO tasks, they -// would be better than imposing the 4ms delay of timers. -// However, they do not work reliably in Internet Explorer or Safari. - -// Internet Explorer 10 is the only browser that has setImmediate but does -// not have MutationObservers. -// Although setImmediate yields to the browser's renderer, it would be -// preferrable to falling back to setTimeout since it does not have -// the minimum 4ms penalty. -// Unfortunately there appears to be a bug in Internet Explorer 10 Mobile (and -// Desktop to a lesser extent) that renders both setImmediate and -// MessageChannel useless for the purposes of ASAP. -// https://github.com/kriskowal/q/issues/396 - -// Timers are implemented universally. -// We fall back to timers in workers in most engines, and in foreground -// contexts in the following browsers. -// However, note that even this simple case requires nuances to operate in a -// broad spectrum of browsers. -// -// - Firefox 3-13 -// - Internet Explorer 6-9 -// - iPad Safari 4.3 -// - Lynx 2.8.7 -} else { - requestFlush = makeRequestCallFromTimer(flush); -} - -// `requestFlush` requests that the high priority event queue be flushed as -// soon as possible. -// This is useful to prevent an error thrown in a task from stalling the event -// queue if the exception handled by Node.js’s -// `process.on("uncaughtException")` or by a domain. -rawAsap.requestFlush = requestFlush; - -// To request a high priority event, we induce a mutation observer by toggling -// the text of a text node between "1" and "-1". -function makeRequestCallFromMutationObserver(callback) { - var toggle = 1; - var observer = new BrowserMutationObserver(callback); - var node = document.createTextNode(""); - observer.observe(node, {characterData: true}); - return function requestCall() { - toggle = -toggle; - node.data = toggle; - }; -} - -// The message channel technique was discovered by Malte Ubl and was the -// original foundation for this library. -// http://www.nonblocking.io/2011/06/windownexttick.html - -// Safari 6.0.5 (at least) intermittently fails to create message ports on a -// page's first load. Thankfully, this version of Safari supports -// MutationObservers, so we don't need to fall back in that case. - -// function makeRequestCallFromMessageChannel(callback) { -// var channel = new MessageChannel(); -// channel.port1.onmessage = callback; -// return function requestCall() { -// channel.port2.postMessage(0); -// }; -// } - -// For reasons explained above, we are also unable to use `setImmediate` -// under any circumstances. -// Even if we were, there is another bug in Internet Explorer 10. -// It is not sufficient to assign `setImmediate` to `requestFlush` because -// `setImmediate` must be called *by name* and therefore must be wrapped in a -// closure. -// Never forget. - -// function makeRequestCallFromSetImmediate(callback) { -// return function requestCall() { -// setImmediate(callback); -// }; -// } - -// Safari 6.0 has a problem where timers will get lost while the user is -// scrolling. This problem does not impact ASAP because Safari 6.0 supports -// mutation observers, so that implementation is used instead. -// However, if we ever elect to use timers in Safari, the prevalent work-around -// is to add a scroll event listener that calls for a flush. - -// `setTimeout` does not call the passed callback if the delay is less than -// approximately 7 in web workers in Firefox 8 through 18, and sometimes not -// even then. - -function makeRequestCallFromTimer(callback) { - return function requestCall() { - // We dispatch a timeout with a specified delay of 0 for engines that - // can reliably accommodate that request. This will usually be snapped - // to a 4 milisecond delay, but once we're flushing, there's no delay - // between events. - var timeoutHandle = setTimeout(handleTimer, 0); - // However, since this timer gets frequently dropped in Firefox - // workers, we enlist an interval handle that will try to fire - // an event 20 times per second until it succeeds. - var intervalHandle = setInterval(handleTimer, 50); - - function handleTimer() { - // Whichever timer succeeds will cancel both timers and - // execute the callback. - clearTimeout(timeoutHandle); - clearInterval(intervalHandle); - callback(); + for (var prop in obj) { + if (obj.hasOwnProperty(prop)) { + cloned[prop] = obj[prop]; } - }; -} - -// This is for `asap.js` only. -// Its name will be periodically randomized to break any code that depends on -// its existence. -rawAsap.makeRequestCallFromTimer = makeRequestCallFromTimer; - -// ASAP was originally a nextTick shim included in Q. This was factored out -// into this ASAP package. It was later adapted to RSVP which made further -// amendments. These decisions, particularly to marginalize MessageChannel and -// to capture the MutationObserver implementation in a closure, were integrated -// back into ASAP proper. -// https://github.com/tildeio/rsvp.js/blob/cddf7232546a9cf858524b75cde6f9edf72620a7/lib/rsvp/asap.js - -}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{}],100:[function(require,module,exports){ -var clone = (function() { -'use strict'; - -function _instanceof(obj, type) { - return type != null && obj instanceof type; -} - -var nativeMap; -try { - nativeMap = Map; -} catch(_) { - // maybe a reference error because no `Map`. Give it a dummy value that no - // value will ever be an instanceof. - nativeMap = function() {}; -} - -var nativeSet; -try { - nativeSet = Set; -} catch(_) { - nativeSet = function() {}; -} - -var nativePromise; -try { - nativePromise = Promise; -} catch(_) { - nativePromise = function() {}; -} - -/** - * Clones (copies) an Object using deep copying. - * - * This function supports circular references by default, but if you are certain - * there are no circular references in your object, you can save some CPU time - * by calling clone(obj, false). - * - * Caution: if `circular` is false and `parent` contains circular references, - * your program may enter an infinite loop and crash. - * - * @param `parent` - the object to be cloned - * @param `circular` - set to true if the object to be cloned may contain - * circular references. (optional - true by default) - * @param `depth` - set to a number if the object is only to be cloned to - * a particular depth. (optional - defaults to Infinity) - * @param `prototype` - sets the prototype to be used when cloning an object. - * (optional - defaults to parent prototype). - * @param `includeNonEnumerable` - set to true if the non-enumerable properties - * should be cloned as well. Non-enumerable properties on the prototype - * chain will be ignored. (optional - false by default) -*/ -function clone(parent, circular, depth, prototype, includeNonEnumerable) { - if (typeof circular === 'object') { - depth = circular.depth; - prototype = circular.prototype; - includeNonEnumerable = circular.includeNonEnumerable; - circular = circular.circular; - } - // maintain two arrays for circular references, where corresponding parents - // and children have the same index - var allParents = []; - var allChildren = []; - - var useBuffer = typeof Buffer != 'undefined'; + } - if (typeof circular == 'undefined') - circular = true; + return cloned; + } // only really needed for phantom - if (typeof depth == 'undefined') - depth = Infinity; - // recurse this function so we don't reset allParents and allChildren - function _clone(parent, depth) { - // cloning null always returns null - if (parent === null) - return null; + function bind(func, thisArg) { + var curryArgs = Array.prototype.slice.call(arguments, 2); + return function () { + var args = curryArgs.concat(Array.prototype.slice.call(arguments, 0)); + return func.apply(thisArg, args); + }; + } - if (depth === 0) - return parent; + function loadStyles(modifyVars) { + var styles = document.getElementsByTagName('style'); + var style; + + for (var i = 0; i < styles.length; i++) { + style = styles[i]; + + if (style.type.match(typePattern)) { + var instanceOptions = clone(options); + instanceOptions.modifyVars = modifyVars; + var lessText = style.innerHTML || ''; + instanceOptions.filename = document.location.href.replace(/#.*$/, ''); + /* jshint loopfunc:true */ + // use closure to store current style + + less.render(lessText, instanceOptions, bind(function (style, e, result) { + if (e) { + errors.add(e, 'inline'); + } else { + style.type = 'text/css'; - var child; - var proto; - if (typeof parent != 'object') { - return parent; - } - - if (_instanceof(parent, nativeMap)) { - child = new nativeMap(); - } else if (_instanceof(parent, nativeSet)) { - child = new nativeSet(); - } else if (_instanceof(parent, nativePromise)) { - child = new nativePromise(function (resolve, reject) { - parent.then(function(value) { - resolve(_clone(value, depth - 1)); - }, function(err) { - reject(_clone(err, depth - 1)); - }); - }); - } else if (clone.__isArray(parent)) { - child = []; - } else if (clone.__isRegExp(parent)) { - child = new RegExp(parent.source, __getRegExpFlags(parent)); - if (parent.lastIndex) child.lastIndex = parent.lastIndex; - } else if (clone.__isDate(parent)) { - child = new Date(parent.getTime()); - } else if (useBuffer && Buffer.isBuffer(parent)) { - if (Buffer.allocUnsafe) { - // Node.js >= 4.5.0 - child = Buffer.allocUnsafe(parent.length); - } else { - // Older Node.js versions - child = new Buffer(parent.length); - } - parent.copy(child); - return child; - } else if (_instanceof(parent, Error)) { - child = Object.create(parent); - } else { - if (typeof prototype == 'undefined') { - proto = Object.getPrototypeOf(parent); - child = Object.create(proto); - } - else { - child = Object.create(prototype); - proto = prototype; + if (style.styleSheet) { + style.styleSheet.cssText = result.css; + } else { + style.innerHTML = result.css; + } + } + }, null, style)); + } } } - if (circular) { - var index = allParents.indexOf(parent); + function loadStyleSheet(sheet, callback, reload, remaining, modifyVars) { + var instanceOptions = clone(options); + addDataAttr(instanceOptions, sheet); + instanceOptions.mime = sheet.type; - if (index != -1) { - return allChildren[index]; + if (modifyVars) { + instanceOptions.modifyVars = modifyVars; } - allParents.push(parent); - allChildren.push(child); - } - if (_instanceof(parent, nativeMap)) { - parent.forEach(function(value, key) { - var keyChild = _clone(key, depth - 1); - var valueChild = _clone(value, depth - 1); - child.set(keyChild, valueChild); - }); - } - if (_instanceof(parent, nativeSet)) { - parent.forEach(function(value) { - var entryChild = _clone(value, depth - 1); - child.add(entryChild); + function loadInitialFileCallback(loadedFile) { + var data = loadedFile.contents; + var path = loadedFile.filename; + var webInfo = loadedFile.webInfo; + var newFileInfo = { + currentDirectory: fileManager.getPath(path), + filename: path, + rootFilename: path, + rewriteUrls: instanceOptions.rewriteUrls + }; + newFileInfo.entryPath = newFileInfo.currentDirectory; + newFileInfo.rootpath = instanceOptions.rootpath || newFileInfo.currentDirectory; + + if (webInfo) { + webInfo.remaining = remaining; + var css = cache.getCSS(path, webInfo, instanceOptions.modifyVars); + + if (!reload && css) { + webInfo.local = true; + callback(null, css, data, sheet, webInfo, path); + return; + } + } // TODO add tests around how this behaves when reloading + + + errors.remove(path); + instanceOptions.rootFileInfo = newFileInfo; + less.render(data, instanceOptions, function (e, result) { + if (e) { + e.href = path; + callback(e); + } else { + cache.setCSS(sheet.href, webInfo.lastModified, instanceOptions.modifyVars, result.css); + callback(null, result.css, data, sheet, webInfo, path); + } + }); + } + + fileManager.loadFile(sheet.href, null, instanceOptions, environment).then(function (loadedFile) { + loadInitialFileCallback(loadedFile); + })["catch"](function (err) { + console.log(err); + callback(err); }); } - for (var i in parent) { - var attrs; - if (proto) { - attrs = Object.getOwnPropertyDescriptor(proto, i); + function loadStyleSheets(callback, reload, modifyVars) { + for (var i = 0; i < less.sheets.length; i++) { + loadStyleSheet(less.sheets[i], callback, reload, less.sheets.length - (i + 1), modifyVars); } + } - if (attrs && attrs.set == null) { - continue; + function initRunningMode() { + if (less.env === 'development') { + less.watchTimer = setInterval(function () { + if (less.watchMode) { + fileManager.clearFileCache(); + loadStyleSheets(function (e, css, _, sheet, webInfo) { + if (e) { + errors.add(e, e.href || sheet.href); + } else if (css) { + browser.createCSS(window.document, css, sheet); + } + }); + } + }, options.poll); } - child[i] = _clone(parent[i], depth - 1); - } + } // + // Watch mode + // - if (Object.getOwnPropertySymbols) { - var symbols = Object.getOwnPropertySymbols(parent); - for (var i = 0; i < symbols.length; i++) { - // Don't need to worry about cloning a symbol because it is a primitive, - // like a number or string. - var symbol = symbols[i]; - var descriptor = Object.getOwnPropertyDescriptor(parent, symbol); - if (descriptor && !descriptor.enumerable && !includeNonEnumerable) { - continue; - } - child[symbol] = _clone(parent[symbol], depth - 1); - if (!descriptor.enumerable) { - Object.defineProperty(child, symbol, { - enumerable: false - }); - } + + less.watch = function () { + if (!less.watchMode) { + less.env = 'development'; + initRunningMode(); } - } - if (includeNonEnumerable) { - var allPropertyNames = Object.getOwnPropertyNames(parent); - for (var i = 0; i < allPropertyNames.length; i++) { - var propertyName = allPropertyNames[i]; - var descriptor = Object.getOwnPropertyDescriptor(parent, propertyName); - if (descriptor && descriptor.enumerable) { - continue; + this.watchMode = true; + return true; + }; + + less.unwatch = function () { + clearInterval(less.watchTimer); + this.watchMode = false; + return false; + }; // + // Synchronously get all tags with the 'rel' attribute set to + // "stylesheet/less". + // + + + less.registerStylesheetsImmediately = function () { + var links = document.getElementsByTagName('link'); + less.sheets = []; + + for (var i = 0; i < links.length; i++) { + if (links[i].rel === 'stylesheet/less' || links[i].rel.match(/stylesheet/) && links[i].type.match(typePattern)) { + less.sheets.push(links[i]); } - child[propertyName] = _clone(parent[propertyName], depth - 1); - Object.defineProperty(child, propertyName, { - enumerable: false - }); } - } + }; // + // Asynchronously get all tags with the 'rel' attribute set to + // "stylesheet/less", returning a Promise. + // - return child; - } - return _clone(parent, depth); -} - -/** - * Simple flat clone using prototype, accepts only objects, usefull for property - * override on FLAT configuration object (no nested props). - * - * USE WITH CAUTION! This may not behave as you wish if you do not know how this - * works. - */ -clone.clonePrototype = function clonePrototype(parent) { - if (parent === null) - return null; - - var c = function () {}; - c.prototype = parent; - return new c(); -}; - -// private utility functions - -function __objToStr(o) { - return Object.prototype.toString.call(o); -} -clone.__objToStr = __objToStr; - -function __isDate(o) { - return typeof o === 'object' && __objToStr(o) === '[object Date]'; -} -clone.__isDate = __isDate; - -function __isArray(o) { - return typeof o === 'object' && __objToStr(o) === '[object Array]'; -} -clone.__isArray = __isArray; - -function __isRegExp(o) { - return typeof o === 'object' && __objToStr(o) === '[object RegExp]'; -} -clone.__isRegExp = __isRegExp; - -function __getRegExpFlags(re) { - var flags = ''; - if (re.global) flags += 'g'; - if (re.ignoreCase) flags += 'i'; - if (re.multiline) flags += 'm'; - return flags; -} -clone.__getRegExpFlags = __getRegExpFlags; - -return clone; -})(); - -if (typeof module === 'object' && module.exports) { - module.exports = clone; -} - -},{}],101:[function(require,module,exports){ -'use strict'; - -var asap = require('asap/raw'); - -function noop() {} - -// States: -// -// 0 - pending -// 1 - fulfilled with _value -// 2 - rejected with _value -// 3 - adopted the state of another promise, _value -// -// once the state is no longer pending (0) it is immutable - -// All `_` prefixed properties will be reduced to `_{random number}` -// at build time to obfuscate them and discourage their use. -// We don't use symbols or Object.defineProperty to fully hide them -// because the performance isn't good enough. - - -// to avoid using try/catch inside critical functions, we -// extract them to here. -var LAST_ERROR = null; -var IS_ERROR = {}; -function getThen(obj) { - try { - return obj.then; - } catch (ex) { - LAST_ERROR = ex; - return IS_ERROR; - } -} + less.registerStylesheets = function () { + return new Promise(function (resolve, reject) { + less.registerStylesheetsImmediately(); + resolve(); + }); + }; // + // With this function, it's possible to alter variables and re-render + // CSS without reloading less-files + // -function tryCallOne(fn, a) { - try { - return fn(a); - } catch (ex) { - LAST_ERROR = ex; - return IS_ERROR; - } -} -function tryCallTwo(fn, a, b) { - try { - fn(a, b); - } catch (ex) { - LAST_ERROR = ex; - return IS_ERROR; - } -} -module.exports = Promise; + less.modifyVars = function (record) { + return less.refresh(true, record, false); + }; -function Promise(fn) { - if (typeof this !== 'object') { - throw new TypeError('Promises must be constructed via new'); - } - if (typeof fn !== 'function') { - throw new TypeError('Promise constructor\'s argument is not a function'); - } - this._40 = 0; - this._65 = 0; - this._55 = null; - this._72 = null; - if (fn === noop) return; - doResolve(fn, this); -} -Promise._37 = null; -Promise._87 = null; -Promise._61 = noop; - -Promise.prototype.then = function(onFulfilled, onRejected) { - if (this.constructor !== Promise) { - return safeThen(this, onFulfilled, onRejected); - } - var res = new Promise(noop); - handle(this, new Handler(onFulfilled, onRejected, res)); - return res; -}; - -function safeThen(self, onFulfilled, onRejected) { - return new self.constructor(function (resolve, reject) { - var res = new Promise(noop); - res.then(resolve, reject); - handle(self, new Handler(onFulfilled, onRejected, res)); - }); -} -function handle(self, deferred) { - while (self._65 === 3) { - self = self._55; - } - if (Promise._37) { - Promise._37(self); - } - if (self._65 === 0) { - if (self._40 === 0) { - self._40 = 1; - self._72 = deferred; - return; - } - if (self._40 === 1) { - self._40 = 2; - self._72 = [self._72, deferred]; - return; - } - self._72.push(deferred); - return; - } - handleResolved(self, deferred); -} - -function handleResolved(self, deferred) { - asap(function() { - var cb = self._65 === 1 ? deferred.onFulfilled : deferred.onRejected; - if (cb === null) { - if (self._65 === 1) { - resolve(deferred.promise, self._55); - } else { - reject(deferred.promise, self._55); + less.refresh = function (reload, modifyVars, clearFileCache) { + if ((reload || clearFileCache) && clearFileCache !== false) { + fileManager.clearFileCache(); } - return; - } - var ret = tryCallOne(cb, self._55); - if (ret === IS_ERROR) { - reject(deferred.promise, LAST_ERROR); - } else { - resolve(deferred.promise, ret); - } - }); -} -function resolve(self, newValue) { - // Promise Resolution Procedure: https://github.com/promises-aplus/promises-spec#the-promise-resolution-procedure - if (newValue === self) { - return reject( - self, - new TypeError('A promise cannot be resolved with itself.') - ); - } - if ( - newValue && - (typeof newValue === 'object' || typeof newValue === 'function') - ) { - var then = getThen(newValue); - if (then === IS_ERROR) { - return reject(self, LAST_ERROR); - } - if ( - then === self.then && - newValue instanceof Promise - ) { - self._65 = 3; - self._55 = newValue; - finale(self); - return; - } else if (typeof then === 'function') { - doResolve(then.bind(newValue), self); - return; - } - } - self._65 = 1; - self._55 = newValue; - finale(self); -} - -function reject(self, newValue) { - self._65 = 2; - self._55 = newValue; - if (Promise._87) { - Promise._87(self, newValue); - } - finale(self); -} -function finale(self) { - if (self._40 === 1) { - handle(self, self._72); - self._72 = null; - } - if (self._40 === 2) { - for (var i = 0; i < self._72.length; i++) { - handle(self, self._72[i]); - } - self._72 = null; - } -} - -function Handler(onFulfilled, onRejected, promise){ - this.onFulfilled = typeof onFulfilled === 'function' ? onFulfilled : null; - this.onRejected = typeof onRejected === 'function' ? onRejected : null; - this.promise = promise; -} - -/** - * Take a potentially misbehaving resolver function and make sure - * onFulfilled and onRejected are only called once. - * - * Makes no guarantees about asynchrony. - */ -function doResolve(fn, promise) { - var done = false; - var res = tryCallTwo(fn, function (value) { - if (done) return; - done = true; - resolve(promise, value); - }, function (reason) { - if (done) return; - done = true; - reject(promise, reason); - }); - if (!done && res === IS_ERROR) { - done = true; - reject(promise, LAST_ERROR); - } -} -},{"asap/raw":99}],102:[function(require,module,exports){ -'use strict'; + return new Promise(function (resolve, reject) { + var startTime; + var endTime; + var totalMilliseconds; + var remainingSheets; + startTime = endTime = new Date(); // Set counter for remaining unprocessed sheets + + remainingSheets = less.sheets.length; + + if (remainingSheets === 0) { + endTime = new Date(); + totalMilliseconds = endTime - startTime; + less.logger.info('Less has finished and no sheets were loaded.'); + resolve({ + startTime: startTime, + endTime: endTime, + totalMilliseconds: totalMilliseconds, + sheets: less.sheets.length + }); + } else { + // Relies on less.sheets array, callback seems to be guaranteed to be called for every element of the array + loadStyleSheets(function (e, css, _, sheet, webInfo) { + if (e) { + errors.add(e, e.href || sheet.href); + reject(e); + return; + } -//This file contains the ES6 extensions to the core Promises/A+ API + if (webInfo.local) { + less.logger.info("Loading ".concat(sheet.href, " from cache.")); + } else { + less.logger.info("Rendered ".concat(sheet.href, " successfully.")); + } -var Promise = require('./core.js'); + browser.createCSS(window.document, css, sheet); + less.logger.info("CSS for ".concat(sheet.href, " generated in ").concat(new Date() - endTime, "ms")); // Count completed sheet -module.exports = Promise; + remainingSheets--; // Check if the last remaining sheet was processed and then call the promise -/* Static Functions */ + if (remainingSheets === 0) { + totalMilliseconds = new Date() - startTime; + less.logger.info("Less has finished. CSS generated in ".concat(totalMilliseconds, "ms")); + resolve({ + startTime: startTime, + endTime: endTime, + totalMilliseconds: totalMilliseconds, + sheets: less.sheets.length + }); + } -var TRUE = valuePromise(true); -var FALSE = valuePromise(false); -var NULL = valuePromise(null); -var UNDEFINED = valuePromise(undefined); -var ZERO = valuePromise(0); -var EMPTYSTRING = valuePromise(''); + endTime = new Date(); + }, reload, modifyVars); + } -function valuePromise(value) { - var p = new Promise(Promise._61); - p._65 = 1; - p._55 = value; - return p; -} -Promise.resolve = function (value) { - if (value instanceof Promise) return value; + loadStyles(modifyVars); + }); + }; - if (value === null) return NULL; - if (value === undefined) return UNDEFINED; - if (value === true) return TRUE; - if (value === false) return FALSE; - if (value === 0) return ZERO; - if (value === '') return EMPTYSTRING; + less.refreshStyles = loadStyles; + return less; + }); - if (typeof value === 'object' || typeof value === 'function') { - try { - var then = value.then; - if (typeof then === 'function') { - return new Promise(then.bind(value)); + /** + * Kicks off less and compiles any stylesheets + * used in the browser distributed version of less + * to kick-start less using the browser api + */ + var options = defaultOptions(); + + if (window.less) { + for (var key in window.less) { + if (window.less.hasOwnProperty(key)) { + options[key] = window.less[key]; } - } catch (ex) { - return new Promise(function (resolve, reject) { - reject(ex); - }); } } - return valuePromise(value); -}; - -Promise.all = function (arr) { - var args = Array.prototype.slice.call(arr); - - return new Promise(function (resolve, reject) { - if (args.length === 0) return resolve([]); - var remaining = args.length; - function res(i, val) { - if (val && (typeof val === 'object' || typeof val === 'function')) { - if (val instanceof Promise && val.then === Promise.prototype.then) { - while (val._65 === 3) { - val = val._55; - } - if (val._65 === 1) return res(i, val._55); - if (val._65 === 2) reject(val._55); - val.then(function (val) { - res(i, val); - }, reject); - return; - } else { - var then = val.then; - if (typeof then === 'function') { - var p = new Promise(then.bind(val)); - p.then(function (val) { - res(i, val); - }, reject); - return; - } - } - } - args[i] = val; - if (--remaining === 0) { - resolve(args); - } + + addDefaultOptions(window, options); + options.plugins = options.plugins || []; + + if (window.LESS_PLUGINS) { + options.plugins = options.plugins.concat(window.LESS_PLUGINS); + } + + var less = root(window, options); + window.less = less; + var css; + var head; + var style; // Always restore page visibility + + function resolveOrReject(data) { + if (data.filename) { + console.warn(data); } - for (var i = 0; i < args.length; i++) { - res(i, args[i]); + + if (!options.async) { + head.removeChild(style); } - }); -}; + } -Promise.reject = function (value) { - return new Promise(function (resolve, reject) { - reject(value); - }); -}; + if (options.onReady) { + if (/!watch/.test(window.location.hash)) { + less.watch(); + } // Simulate synchronous stylesheet loading by hiding page rendering -Promise.race = function (values) { - return new Promise(function (resolve, reject) { - values.forEach(function(value){ - Promise.resolve(value).then(resolve, reject); - }); - }); -}; -/* Prototype Methods */ + if (!options.async) { + css = 'body { display: none !important }'; + head = document.head || document.getElementsByTagName('head')[0]; + style = document.createElement('style'); + style.type = 'text/css'; -Promise.prototype['catch'] = function (onRejected) { - return this.then(null, onRejected); -}; + if (style.styleSheet) { + style.styleSheet.cssText = css; + } else { + style.appendChild(document.createTextNode(css)); + } -},{"./core.js":101}],103:[function(require,module,exports){ -// should work in any browser without browserify + head.appendChild(style); + } -if (typeof Promise.prototype.done !== 'function') { - Promise.prototype.done = function (onFulfilled, onRejected) { - var self = arguments.length ? this.then.apply(this, arguments) : this - self.then(null, function (err) { - setTimeout(function () { - throw err - }, 0) - }) + less.registerStylesheetsImmediately(); + less.pageLoadFinished = less.refresh(less.env === 'development').then(resolveOrReject, resolveOrReject); } -} -},{}],104:[function(require,module,exports){ -// not "use strict" so we can declare global "Promise" - -var asap = require('asap'); - -if (typeof Promise === 'undefined') { - Promise = require('./lib/core.js') - require('./lib/es6-extensions.js') -} -require('./polyfill-done.js'); + return less; -},{"./lib/core.js":101,"./lib/es6-extensions.js":102,"./polyfill-done.js":103,"asap":98}]},{},[2])(2) -}); \ No newline at end of file +})); +//# sourceMappingURL=less.js.map diff --git a/dist/less.js.map b/dist/less.js.map new file mode 100644 index 000000000..07e2dd187 --- /dev/null +++ b/dist/less.js.map @@ -0,0 +1 @@ +{"version":3,"file":"less.js","sources":["../lib/less/default-options.js","../lib/less-browser/utils.js","../lib/less-browser/browser.js","../lib/less-browser/add-default-options.js","../lib/less/data/colors.js","../lib/less/data/unit-conversions.js","../lib/less/data/index.js","../lib/less/tree/node.js","../lib/less/tree/color.js","../lib/less/tree/paren.js","../lib/less/tree/combinator.js","../lib/less/tree/element.js","../lib/less/constants.js","../node_modules/clone/clone.js","../lib/less/utils.js","../lib/less/less-error.js","../lib/less/tree/selector.js","../lib/less/tree/value.js","../lib/less/tree/keyword.js","../lib/less/tree/anonymous.js","../lib/less/tree/declaration.js","../lib/less/tree/debug-info.js","../lib/less/tree/comment.js","../lib/less/contexts.js","../lib/less/functions/function-registry.js","../lib/less/functions/default.js","../lib/less/tree/ruleset.js","../lib/less/tree/atrule.js","../lib/less/tree/detached-ruleset.js","../lib/less/tree/unit.js","../lib/less/tree/dimension.js","../lib/less/tree/operation.js","../lib/less/tree/expression.js","../lib/less/functions/function-caller.js","../lib/less/tree/call.js","../lib/less/tree/variable.js","../lib/less/tree/property.js","../lib/less/tree/attribute.js","../lib/less/tree/quoted.js","../lib/less/tree/url.js","../lib/less/tree/media.js","../lib/less/tree/import.js","../lib/less/tree/js-eval-node.js","../lib/less/tree/javascript.js","../lib/less/tree/assignment.js","../lib/less/tree/condition.js","../lib/less/tree/unicode-descriptor.js","../lib/less/tree/negative.js","../lib/less/tree/extend.js","../lib/less/tree/variable-call.js","../lib/less/tree/namespace-value.js","../lib/less/tree/mixin-definition.js","../lib/less/tree/mixin-call.js","../lib/less/tree/index.js","../lib/less/logger.js","../lib/less/environment/environment.js","../lib/less/environment/abstract-file-manager.js","../lib/less/environment/abstract-plugin-loader.js","../lib/less/visitors/visitor.js","../lib/less/visitors/import-sequencer.js","../lib/less/visitors/import-visitor.js","../lib/less/visitors/set-tree-visibility-visitor.js","../lib/less/visitors/extend-visitor.js","../lib/less/visitors/join-selector-visitor.js","../lib/less/visitors/to-css-visitor.js","../lib/less/visitors/index.js","../lib/less/parser/chunker.js","../lib/less/parser/parser-input.js","../lib/less/parser/parser.js","../lib/less/functions/boolean.js","../lib/less/functions/color.js","../lib/less/functions/color-blending.js","../lib/less/functions/data-uri.js","../lib/less/functions/list.js","../lib/less/functions/math-helper.js","../lib/less/functions/math.js","../lib/less/functions/number.js","../lib/less/functions/string.js","../lib/less/functions/svg.js","../lib/less/functions/types.js","../lib/less/functions/index.js","../lib/less/source-map-output.js","../lib/less/source-map-builder.js","../lib/less/transform-tree.js","../lib/less/parse-tree.js","../lib/less/import-manager.js","../lib/less/render.js","../lib/less/plugin-manager.js","../lib/less/parse.js","../lib/less/index.js","../lib/less-browser/file-manager.js","../lib/less-browser/plugin-loader.js","../lib/less-browser/log-listener.js","../lib/less-browser/error-reporting.js","../lib/less-browser/cache.js","../lib/less-browser/image-size.js","../lib/less-browser/index.js","../lib/less-browser/bootstrap.js"],"sourcesContent":["// Export a new default each time\nexport default () => ({\n /* Inline Javascript - @plugin still allowed */\n javascriptEnabled: false,\n\n /* Outputs a makefile import dependency list to stdout. */\n depends: false,\n\n /* (DEPRECATED) Compress using less built-in compression. \n * This does an okay job but does not utilise all the tricks of \n * dedicated css compression. */\n compress: false,\n\n /* Runs the less parser and just reports errors without any output. */\n lint: false,\n\n /* Sets available include paths.\n * If the file in an @import rule does not exist at that exact location, \n * less will look for it at the location(s) passed to this option. \n * You might use this for instance to specify a path to a library which \n * you want to be referenced simply and relatively in the less files. */\n paths: [],\n\n /* color output in the terminal */\n color: true,\n\n /* The strictImports controls whether the compiler will allow an @import inside of either \n * @media blocks or (a later addition) other selector blocks.\n * See: https://github.com/less/less.js/issues/656 */\n strictImports: false,\n\n /* Allow Imports from Insecure HTTPS Hosts */\n insecure: false,\n\n /* Allows you to add a path to every generated import and url in your css. \n * This does not affect less import statements that are processed, just ones \n * that are left in the output css. */\n rootpath: '',\n\n /* By default URLs are kept as-is, so if you import a file in a sub-directory \n * that references an image, exactly the same URL will be output in the css. \n * This option allows you to re-write URL's in imported files so that the \n * URL is always relative to the base imported file */\n rewriteUrls: false,\n\n /* Compatibility with IE8. Used for limiting data-uri length */\n // true until 3.0\n ieCompat: false,\n\n /* How to process math \n * 0 always - eagerly try to solve all operations\n * 1 parens-division - require parens for division \"/\"\n * 2 parens | strict - require parens for all operations\n * 3 strict-legacy - legacy strict behavior (super-strict)\n */\n math: 0,\n\n /* Without this option, less attempts to guess at the output unit when it does maths. */\n strictUnits: false,\n\n /* Effectively the declaration is put at the top of your base Less file, \n * meaning it can be used but it also can be overridden if this variable \n * is defined in the file. */\n globalVars: null,\n\n /* As opposed to the global variable option, this puts the declaration at the\n * end of your base file, meaning it will override anything defined in your Less file. */\n modifyVars: null,\n\n /* This option allows you to specify a argument to go on to every URL. */\n urlArgs: ''\n});","\nexport function extractId(href) {\n return href.replace(/^[a-z-]+:\\/+?[^\\/]+/, '') // Remove protocol & domain\n .replace(/[\\?\\&]livereload=\\w+/, '') // Remove LiveReload cachebuster\n .replace(/^\\//, '') // Remove root /\n .replace(/\\.[a-zA-Z]+$/, '') // Remove simple extension\n .replace(/[^\\.\\w-]+/g, '-') // Replace illegal characters\n .replace(/\\./g, ':'); // Replace dots with colons(for valid id)\n}\n\nexport function addDataAttr(options, tag) {\n for (const opt in tag.dataset) {\n if (tag.dataset.hasOwnProperty(opt)) {\n if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') {\n options[opt] = tag.dataset[opt];\n } else {\n try {\n options[opt] = JSON.parse(tag.dataset[opt]);\n }\n catch (_) {}\n }\n }\n }\n}\n","import * as utils from './utils';\n\nexport default {\n createCSS: function (document, styles, sheet) {\n // Strip the query-string\n const href = sheet.href || '';\n\n // If there is no title set, use the filename, minus the extension\n const id = `less:${sheet.title || utils.extractId(href)}`;\n\n // If this has already been inserted into the DOM, we may need to replace it\n const oldStyleNode = document.getElementById(id);\n let keepOldStyleNode = false;\n\n // Create a new stylesheet node for insertion or (if necessary) replacement\n const styleNode = document.createElement('style');\n styleNode.setAttribute('type', 'text/css');\n if (sheet.media) {\n styleNode.setAttribute('media', sheet.media);\n }\n styleNode.id = id;\n\n if (!styleNode.styleSheet) {\n styleNode.appendChild(document.createTextNode(styles));\n\n // If new contents match contents of oldStyleNode, don't replace oldStyleNode\n keepOldStyleNode = (oldStyleNode !== null && oldStyleNode.childNodes.length > 0 && styleNode.childNodes.length > 0 &&\n oldStyleNode.firstChild.nodeValue === styleNode.firstChild.nodeValue);\n }\n\n const head = document.getElementsByTagName('head')[0];\n\n // If there is no oldStyleNode, just append; otherwise, only append if we need\n // to replace oldStyleNode with an updated stylesheet\n if (oldStyleNode === null || keepOldStyleNode === false) {\n const nextEl = sheet && sheet.nextSibling || null;\n if (nextEl) {\n nextEl.parentNode.insertBefore(styleNode, nextEl);\n } else {\n head.appendChild(styleNode);\n }\n }\n if (oldStyleNode && keepOldStyleNode === false) {\n oldStyleNode.parentNode.removeChild(oldStyleNode);\n }\n\n // For IE.\n // This needs to happen *after* the style element is added to the DOM, otherwise IE 7 and 8 may crash.\n // See http://social.msdn.microsoft.com/Forums/en-US/7e081b65-878a-4c22-8e68-c10d39c2ed32/internet-explorer-crashes-appending-style-element-to-head\n if (styleNode.styleSheet) {\n try {\n styleNode.styleSheet.cssText = styles;\n } catch (e) {\n throw new Error('Couldn\\'t reassign styleSheet.cssText.');\n }\n }\n },\n currentScript: function(window) {\n const document = window.document;\n return document.currentScript || (() => {\n const scripts = document.getElementsByTagName('script');\n return scripts[scripts.length - 1];\n })();\n }\n};\n","import {addDataAttr} from './utils';\nimport browser from './browser';\n\nexport default (window, options) => {\n\n // use options from the current script tag data attribues\n addDataAttr(options, browser.currentScript(window));\n\n if (options.isFileProtocol === undefined) {\n options.isFileProtocol = /^(file|(chrome|safari)(-extension)?|resource|qrc|app):/.test(window.location.protocol);\n }\n\n // Load styles asynchronously (default: false)\n //\n // This is set to `false` by default, so that the body\n // doesn't start loading before the stylesheets are parsed.\n // Setting this to `true` can result in flickering.\n //\n options.async = options.async || false;\n options.fileAsync = options.fileAsync || false;\n\n // Interval between watch polls\n options.poll = options.poll || (options.isFileProtocol ? 1000 : 1500);\n\n options.env = options.env || (window.location.hostname == '127.0.0.1' ||\n window.location.hostname == '0.0.0.0' ||\n window.location.hostname == 'localhost' ||\n (window.location.port &&\n window.location.port.length > 0) ||\n options.isFileProtocol ? 'development'\n : 'production');\n\n const dumpLineNumbers = /!dumpLineNumbers:(comments|mediaquery|all)/.exec(window.location.hash);\n if (dumpLineNumbers) {\n options.dumpLineNumbers = dumpLineNumbers[1];\n }\n\n if (options.useFileCache === undefined) {\n options.useFileCache = true;\n }\n\n if (options.onReady === undefined) {\n options.onReady = true;\n }\n\n if (options.relativeUrls) {\n options.rewriteUrls = 'all';\n }\n};\n","export default {\n 'aliceblue':'#f0f8ff',\n 'antiquewhite':'#faebd7',\n 'aqua':'#00ffff',\n 'aquamarine':'#7fffd4',\n 'azure':'#f0ffff',\n 'beige':'#f5f5dc',\n 'bisque':'#ffe4c4',\n 'black':'#000000',\n 'blanchedalmond':'#ffebcd',\n 'blue':'#0000ff',\n 'blueviolet':'#8a2be2',\n 'brown':'#a52a2a',\n 'burlywood':'#deb887',\n 'cadetblue':'#5f9ea0',\n 'chartreuse':'#7fff00',\n 'chocolate':'#d2691e',\n 'coral':'#ff7f50',\n 'cornflowerblue':'#6495ed',\n 'cornsilk':'#fff8dc',\n 'crimson':'#dc143c',\n 'cyan':'#00ffff',\n 'darkblue':'#00008b',\n 'darkcyan':'#008b8b',\n 'darkgoldenrod':'#b8860b',\n 'darkgray':'#a9a9a9',\n 'darkgrey':'#a9a9a9',\n 'darkgreen':'#006400',\n 'darkkhaki':'#bdb76b',\n 'darkmagenta':'#8b008b',\n 'darkolivegreen':'#556b2f',\n 'darkorange':'#ff8c00',\n 'darkorchid':'#9932cc',\n 'darkred':'#8b0000',\n 'darksalmon':'#e9967a',\n 'darkseagreen':'#8fbc8f',\n 'darkslateblue':'#483d8b',\n 'darkslategray':'#2f4f4f',\n 'darkslategrey':'#2f4f4f',\n 'darkturquoise':'#00ced1',\n 'darkviolet':'#9400d3',\n 'deeppink':'#ff1493',\n 'deepskyblue':'#00bfff',\n 'dimgray':'#696969',\n 'dimgrey':'#696969',\n 'dodgerblue':'#1e90ff',\n 'firebrick':'#b22222',\n 'floralwhite':'#fffaf0',\n 'forestgreen':'#228b22',\n 'fuchsia':'#ff00ff',\n 'gainsboro':'#dcdcdc',\n 'ghostwhite':'#f8f8ff',\n 'gold':'#ffd700',\n 'goldenrod':'#daa520',\n 'gray':'#808080',\n 'grey':'#808080',\n 'green':'#008000',\n 'greenyellow':'#adff2f',\n 'honeydew':'#f0fff0',\n 'hotpink':'#ff69b4',\n 'indianred':'#cd5c5c',\n 'indigo':'#4b0082',\n 'ivory':'#fffff0',\n 'khaki':'#f0e68c',\n 'lavender':'#e6e6fa',\n 'lavenderblush':'#fff0f5',\n 'lawngreen':'#7cfc00',\n 'lemonchiffon':'#fffacd',\n 'lightblue':'#add8e6',\n 'lightcoral':'#f08080',\n 'lightcyan':'#e0ffff',\n 'lightgoldenrodyellow':'#fafad2',\n 'lightgray':'#d3d3d3',\n 'lightgrey':'#d3d3d3',\n 'lightgreen':'#90ee90',\n 'lightpink':'#ffb6c1',\n 'lightsalmon':'#ffa07a',\n 'lightseagreen':'#20b2aa',\n 'lightskyblue':'#87cefa',\n 'lightslategray':'#778899',\n 'lightslategrey':'#778899',\n 'lightsteelblue':'#b0c4de',\n 'lightyellow':'#ffffe0',\n 'lime':'#00ff00',\n 'limegreen':'#32cd32',\n 'linen':'#faf0e6',\n 'magenta':'#ff00ff',\n 'maroon':'#800000',\n 'mediumaquamarine':'#66cdaa',\n 'mediumblue':'#0000cd',\n 'mediumorchid':'#ba55d3',\n 'mediumpurple':'#9370d8',\n 'mediumseagreen':'#3cb371',\n 'mediumslateblue':'#7b68ee',\n 'mediumspringgreen':'#00fa9a',\n 'mediumturquoise':'#48d1cc',\n 'mediumvioletred':'#c71585',\n 'midnightblue':'#191970',\n 'mintcream':'#f5fffa',\n 'mistyrose':'#ffe4e1',\n 'moccasin':'#ffe4b5',\n 'navajowhite':'#ffdead',\n 'navy':'#000080',\n 'oldlace':'#fdf5e6',\n 'olive':'#808000',\n 'olivedrab':'#6b8e23',\n 'orange':'#ffa500',\n 'orangered':'#ff4500',\n 'orchid':'#da70d6',\n 'palegoldenrod':'#eee8aa',\n 'palegreen':'#98fb98',\n 'paleturquoise':'#afeeee',\n 'palevioletred':'#d87093',\n 'papayawhip':'#ffefd5',\n 'peachpuff':'#ffdab9',\n 'peru':'#cd853f',\n 'pink':'#ffc0cb',\n 'plum':'#dda0dd',\n 'powderblue':'#b0e0e6',\n 'purple':'#800080',\n 'rebeccapurple':'#663399',\n 'red':'#ff0000',\n 'rosybrown':'#bc8f8f',\n 'royalblue':'#4169e1',\n 'saddlebrown':'#8b4513',\n 'salmon':'#fa8072',\n 'sandybrown':'#f4a460',\n 'seagreen':'#2e8b57',\n 'seashell':'#fff5ee',\n 'sienna':'#a0522d',\n 'silver':'#c0c0c0',\n 'skyblue':'#87ceeb',\n 'slateblue':'#6a5acd',\n 'slategray':'#708090',\n 'slategrey':'#708090',\n 'snow':'#fffafa',\n 'springgreen':'#00ff7f',\n 'steelblue':'#4682b4',\n 'tan':'#d2b48c',\n 'teal':'#008080',\n 'thistle':'#d8bfd8',\n 'tomato':'#ff6347',\n 'turquoise':'#40e0d0',\n 'violet':'#ee82ee',\n 'wheat':'#f5deb3',\n 'white':'#ffffff',\n 'whitesmoke':'#f5f5f5',\n 'yellow':'#ffff00',\n 'yellowgreen':'#9acd32'\n};","export default {\n length: {\n 'm': 1,\n 'cm': 0.01,\n 'mm': 0.001,\n 'in': 0.0254,\n 'px': 0.0254 / 96,\n 'pt': 0.0254 / 72,\n 'pc': 0.0254 / 72 * 12\n },\n duration: {\n 's': 1,\n 'ms': 0.001\n },\n angle: {\n 'rad': 1 / (2 * Math.PI),\n 'deg': 1 / 360,\n 'grad': 1 / 400,\n 'turn': 1\n }\n};","import colors from './colors';\nimport unitConversions from './unit-conversions';\n\nexport default { colors, unitConversions };\n","class Node {\n constructor() {\n this.parent = null;\n this.visibilityBlocks = undefined;\n this.nodeVisible = undefined;\n this.rootNode = null;\n this.parsed = null;\n\n const self = this;\n Object.defineProperty(this, 'currentFileInfo', {\n get: function() { return self.fileInfo(); }\n });\n Object.defineProperty(this, 'index', {\n get: function() { return self.getIndex(); }\n });\n\n }\n\n setParent(nodes, parent) {\n function set(node) {\n if (node && node instanceof Node) {\n node.parent = parent;\n }\n }\n if (Array.isArray(nodes)) {\n nodes.forEach(set);\n }\n else {\n set(nodes);\n }\n }\n\n getIndex() {\n return this._index || (this.parent && this.parent.getIndex()) || 0;\n }\n\n fileInfo() {\n return this._fileInfo || (this.parent && this.parent.fileInfo()) || {};\n }\n\n isRulesetLike() {\n return false;\n }\n\n toCSS(context) {\n const strs = [];\n this.genCSS(context, {\n add: function(chunk, fileInfo, index) {\n strs.push(chunk);\n },\n isEmpty: function () {\n return strs.length === 0;\n }\n });\n return strs.join('');\n }\n\n genCSS(context, output) {\n output.add(this.value);\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval() { return this; }\n\n _operate(context, op, a, b) {\n switch (op) {\n case '+': return a + b;\n case '-': return a - b;\n case '*': return a * b;\n case '/': return a / b;\n }\n }\n\n fround(context, value) {\n const precision = context && context.numPrecision;\n // add \"epsilon\" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded:\n return (precision) ? Number((value + 2e-16).toFixed(precision)) : value;\n }\n\n // Returns true if this node represents root of ast imported by reference\n blocksVisibility() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n return this.visibilityBlocks !== 0;\n }\n\n addVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks + 1;\n }\n\n removeVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks - 1;\n }\n\n // Turns on node visibility - if called node will be shown in output regardless\n // of whether it comes from import by reference or not\n ensureVisibility() {\n this.nodeVisible = true;\n }\n\n // Turns off node visibility - if called node will NOT be shown in output regardless\n // of whether it comes from import by reference or not\n ensureInvisibility() {\n this.nodeVisible = false;\n }\n\n // return values:\n // false - the node must not be visible\n // true - the node must be visible\n // undefined or null - the node has the same visibility as its parent\n isVisible() {\n return this.nodeVisible;\n }\n\n visibilityInfo() {\n return {\n visibilityBlocks: this.visibilityBlocks,\n nodeVisible: this.nodeVisible\n };\n }\n\n copyVisibilityInfo(info) {\n if (!info) {\n return;\n }\n this.visibilityBlocks = info.visibilityBlocks;\n this.nodeVisible = info.nodeVisible;\n }\n}\n\nNode.compare = (a, b) => {\n /* returns:\n -1: a < b\n 0: a = b\n 1: a > b\n and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */\n\n if ((a.compare) &&\n // for \"symmetric results\" force toCSS-based comparison\n // of Quoted or Anonymous if either value is one of those\n !(b.type === 'Quoted' || b.type === 'Anonymous')) {\n return a.compare(b);\n } else if (b.compare) {\n return -b.compare(a);\n } else if (a.type !== b.type) {\n return undefined;\n }\n\n a = a.value;\n b = b.value;\n if (!Array.isArray(a)) {\n return a === b ? 0 : undefined;\n }\n if (a.length !== b.length) {\n return undefined;\n }\n for (let i = 0; i < a.length; i++) {\n if (Node.compare(a[i], b[i]) !== 0) {\n return undefined;\n }\n }\n return 0;\n};\n\nNode.numericCompare = (a, b) => a < b ? -1\n : a === b ? 0\n : a > b ? 1 : undefined;\nexport default Node;\n","import Node from './node';\nimport colors from '../data/colors';\n\n//\n// RGB Colors - #ff0014, #eee\n//\nclass Color extends Node {\n constructor(rgb, a, originalForm) {\n const self = this;\n //\n // The end goal here, is to parse the arguments\n // into an integer triplet, such as `128, 255, 0`\n //\n // This facilitates operations and conversions.\n //\n if (Array.isArray(rgb)) {\n this.rgb = rgb;\n } else if (rgb.length >= 6) {\n this.rgb = [];\n rgb.match(/.{2}/g).map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c, 16));\n } else {\n self.alpha = (parseInt(c, 16)) / 255;\n }\n });\n } else {\n this.rgb = [];\n rgb.split('').map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c + c, 16));\n } else {\n self.alpha = (parseInt(c + c, 16)) / 255;\n }\n });\n }\n this.alpha = this.alpha || (typeof a === 'number' ? a : 1);\n if (typeof originalForm !== 'undefined') {\n this.value = originalForm;\n }\n }\n\n luma() {\n let r = this.rgb[0] / 255;\n let g = this.rgb[1] / 255;\n let b = this.rgb[2] / 255;\n\n r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4);\n g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4);\n b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4);\n\n return 0.2126 * r + 0.7152 * g + 0.0722 * b;\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context, doNotCompress) {\n const compress = context && context.compress && !doNotCompress;\n let color;\n let alpha;\n let colorFunction;\n let args = [];\n\n // `value` is set if this color was originally\n // converted from a named color string so we need\n // to respect this and try to output named color too.\n alpha = this.fround(context, this.alpha);\n\n if (this.value) {\n if (this.value.indexOf('rgb') === 0) {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n } else if (this.value.indexOf('hsl') === 0) {\n if (alpha < 1) {\n colorFunction = 'hsla';\n } else {\n colorFunction = 'hsl';\n }\n } else {\n return this.value;\n }\n } else {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n }\n\n switch (colorFunction) {\n case 'rgba':\n args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1));\n break;\n case 'hsla':\n args.push(clamp(alpha, 1));\n case 'hsl':\n color = this.toHSL();\n args = [\n this.fround(context, color.h),\n `${this.fround(context, color.s * 100)}%`,\n `${this.fround(context, color.l * 100)}%`\n ].concat(args);\n }\n\n if (colorFunction) {\n // Values are capped between `0` and `255`, rounded and zero-padded.\n return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`;\n }\n\n color = this.toRGB();\n\n if (compress) {\n const splitcolor = color.split('');\n\n // Convert color to short format\n if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) {\n color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`;\n }\n }\n\n return color;\n }\n\n //\n // Operations have to be done per-channel, if not,\n // channels will spill onto each other. Once we have\n // our result, in the form of an integer triplet,\n // we create a new Color node to hold the result.\n //\n operate(context, op, other) {\n const rgb = new Array(3);\n const alpha = this.alpha * (1 - other.alpha) + other.alpha;\n for (let c = 0; c < 3; c++) {\n rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]);\n }\n return new Color(rgb, alpha);\n }\n\n toRGB() {\n return toHex(this.rgb);\n }\n\n toHSL() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const l = (max + min) / 2;\n const d = max - min;\n\n if (max === min) {\n h = s = 0;\n } else {\n s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, l, a };\n }\n\n // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript\n toHSV() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const v = max;\n\n const d = max - min;\n if (max === 0) {\n s = 0;\n } else {\n s = d / max;\n }\n\n if (max === min) {\n h = 0;\n } else {\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, v, a };\n }\n\n toARGB() {\n return toHex([this.alpha * 255].concat(this.rgb));\n }\n\n compare(x) {\n return (x.rgb &&\n x.rgb[0] === this.rgb[0] &&\n x.rgb[1] === this.rgb[1] &&\n x.rgb[2] === this.rgb[2] &&\n x.alpha === this.alpha) ? 0 : undefined;\n }\n}\n\nColor.prototype.type = 'Color';\n\nfunction clamp(v, max) {\n return Math.min(Math.max(v, 0), max);\n}\n\nfunction toHex(v) {\n return `#${v.map(c => {\n c = clamp(Math.round(c), 255);\n return (c < 16 ? '0' : '') + c.toString(16);\n}).join('')}`;\n}\n\nColor.fromKeyword = keyword => {\n let c;\n const key = keyword.toLowerCase();\n if (colors.hasOwnProperty(key)) {\n c = new Color(colors[key].slice(1));\n }\n else if (key === 'transparent') {\n c = new Color([0, 0, 0], 0);\n }\n\n if (c) {\n c.value = keyword;\n return c;\n }\n};\nexport default Color;\n","import Node from './node';\n\nclass Paren extends Node {\n constructor(node) {\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n return new Paren(this.value.eval(context));\n }\n}\n\nParen.prototype.type = 'Paren';\nexport default Paren;\n","import Node from './node';\n\nclass Combinator extends Node {\n constructor(value) {\n if (value === ' ') {\n this.value = ' ';\n this.emptyOrWhitespace = true;\n } else {\n this.value = value ? value.trim() : '';\n this.emptyOrWhitespace = this.value === '';\n }\n }\n\n genCSS(context, output) {\n const spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' ';\n output.add(spaceOrEmpty + this.value + spaceOrEmpty);\n }\n}\n\nCombinator.prototype.type = 'Combinator';\nconst _noSpaceCombinators = {\n '': true,\n ' ': true,\n '|': true\n};\nexport default Combinator;\n","import Node from './node';\nimport Paren from './paren';\nimport Combinator from './combinator';\n\nclass Element extends Node {\n constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) {\n this.combinator = combinator instanceof Combinator ?\n combinator : new Combinator(combinator);\n\n if (typeof value === 'string') {\n this.value = value.trim();\n } else if (value) {\n this.value = value;\n } else {\n this.value = '';\n }\n this.isVariable = isVariable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.combinator, this);\n }\n\n accept(visitor) {\n const value = this.value;\n this.combinator = visitor.visit(this.combinator);\n if (typeof value === 'object') {\n this.value = visitor.visit(value);\n }\n }\n\n eval(context) {\n return new Element(this.combinator,\n this.value.eval ? this.value.eval(context) : this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n clone() {\n return new Element(this.combinator,\n this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context), this.fileInfo(), this.getIndex());\n }\n\n toCSS(context = {}) {\n let value = this.value;\n const firstSelector = context.firstSelector;\n if (value instanceof Paren) {\n // selector in parens should not be affected by outer selector\n // flags (breaks only interpolated selectors - see #1973)\n context.firstSelector = true;\n }\n value = value.toCSS ? value.toCSS(context) : value;\n context.firstSelector = firstSelector;\n if (value === '' && this.combinator.value.charAt(0) === '&') {\n return '';\n } else {\n return this.combinator.toCSS(context) + value;\n }\n }\n}\n\nElement.prototype.type = 'Element';\nexport default Element;\n","\nexport const Math = {\n ALWAYS: 0,\n PARENS_DIVISION: 1,\n PARENS: 2,\n STRICT_LEGACY: 3\n};\n\nexport const RewriteUrls = {\n OFF: 0,\n LOCAL: 1,\n ALL: 2\n};","var clone = (function() {\n'use strict';\n\nfunction _instanceof(obj, type) {\n return type != null && obj instanceof type;\n}\n\nvar nativeMap;\ntry {\n nativeMap = Map;\n} catch(_) {\n // maybe a reference error because no `Map`. Give it a dummy value that no\n // value will ever be an instanceof.\n nativeMap = function() {};\n}\n\nvar nativeSet;\ntry {\n nativeSet = Set;\n} catch(_) {\n nativeSet = function() {};\n}\n\nvar nativePromise;\ntry {\n nativePromise = Promise;\n} catch(_) {\n nativePromise = function() {};\n}\n\n/**\n * Clones (copies) an Object using deep copying.\n *\n * This function supports circular references by default, but if you are certain\n * there are no circular references in your object, you can save some CPU time\n * by calling clone(obj, false).\n *\n * Caution: if `circular` is false and `parent` contains circular references,\n * your program may enter an infinite loop and crash.\n *\n * @param `parent` - the object to be cloned\n * @param `circular` - set to true if the object to be cloned may contain\n * circular references. (optional - true by default)\n * @param `depth` - set to a number if the object is only to be cloned to\n * a particular depth. (optional - defaults to Infinity)\n * @param `prototype` - sets the prototype to be used when cloning an object.\n * (optional - defaults to parent prototype).\n * @param `includeNonEnumerable` - set to true if the non-enumerable properties\n * should be cloned as well. Non-enumerable properties on the prototype\n * chain will be ignored. (optional - false by default)\n*/\nfunction clone(parent, circular, depth, prototype, includeNonEnumerable) {\n if (typeof circular === 'object') {\n depth = circular.depth;\n prototype = circular.prototype;\n includeNonEnumerable = circular.includeNonEnumerable;\n circular = circular.circular;\n }\n // maintain two arrays for circular references, where corresponding parents\n // and children have the same index\n var allParents = [];\n var allChildren = [];\n\n var useBuffer = typeof Buffer != 'undefined';\n\n if (typeof circular == 'undefined')\n circular = true;\n\n if (typeof depth == 'undefined')\n depth = Infinity;\n\n // recurse this function so we don't reset allParents and allChildren\n function _clone(parent, depth) {\n // cloning null always returns null\n if (parent === null)\n return null;\n\n if (depth === 0)\n return parent;\n\n var child;\n var proto;\n if (typeof parent != 'object') {\n return parent;\n }\n\n if (_instanceof(parent, nativeMap)) {\n child = new nativeMap();\n } else if (_instanceof(parent, nativeSet)) {\n child = new nativeSet();\n } else if (_instanceof(parent, nativePromise)) {\n child = new nativePromise(function (resolve, reject) {\n parent.then(function(value) {\n resolve(_clone(value, depth - 1));\n }, function(err) {\n reject(_clone(err, depth - 1));\n });\n });\n } else if (clone.__isArray(parent)) {\n child = [];\n } else if (clone.__isRegExp(parent)) {\n child = new RegExp(parent.source, __getRegExpFlags(parent));\n if (parent.lastIndex) child.lastIndex = parent.lastIndex;\n } else if (clone.__isDate(parent)) {\n child = new Date(parent.getTime());\n } else if (useBuffer && Buffer.isBuffer(parent)) {\n if (Buffer.allocUnsafe) {\n // Node.js >= 4.5.0\n child = Buffer.allocUnsafe(parent.length);\n } else {\n // Older Node.js versions\n child = new Buffer(parent.length);\n }\n parent.copy(child);\n return child;\n } else if (_instanceof(parent, Error)) {\n child = Object.create(parent);\n } else {\n if (typeof prototype == 'undefined') {\n proto = Object.getPrototypeOf(parent);\n child = Object.create(proto);\n }\n else {\n child = Object.create(prototype);\n proto = prototype;\n }\n }\n\n if (circular) {\n var index = allParents.indexOf(parent);\n\n if (index != -1) {\n return allChildren[index];\n }\n allParents.push(parent);\n allChildren.push(child);\n }\n\n if (_instanceof(parent, nativeMap)) {\n parent.forEach(function(value, key) {\n var keyChild = _clone(key, depth - 1);\n var valueChild = _clone(value, depth - 1);\n child.set(keyChild, valueChild);\n });\n }\n if (_instanceof(parent, nativeSet)) {\n parent.forEach(function(value) {\n var entryChild = _clone(value, depth - 1);\n child.add(entryChild);\n });\n }\n\n for (var i in parent) {\n var attrs;\n if (proto) {\n attrs = Object.getOwnPropertyDescriptor(proto, i);\n }\n\n if (attrs && attrs.set == null) {\n continue;\n }\n child[i] = _clone(parent[i], depth - 1);\n }\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(parent);\n for (var i = 0; i < symbols.length; i++) {\n // Don't need to worry about cloning a symbol because it is a primitive,\n // like a number or string.\n var symbol = symbols[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, symbol);\n if (descriptor && !descriptor.enumerable && !includeNonEnumerable) {\n continue;\n }\n child[symbol] = _clone(parent[symbol], depth - 1);\n if (!descriptor.enumerable) {\n Object.defineProperty(child, symbol, {\n enumerable: false\n });\n }\n }\n }\n\n if (includeNonEnumerable) {\n var allPropertyNames = Object.getOwnPropertyNames(parent);\n for (var i = 0; i < allPropertyNames.length; i++) {\n var propertyName = allPropertyNames[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, propertyName);\n if (descriptor && descriptor.enumerable) {\n continue;\n }\n child[propertyName] = _clone(parent[propertyName], depth - 1);\n Object.defineProperty(child, propertyName, {\n enumerable: false\n });\n }\n }\n\n return child;\n }\n\n return _clone(parent, depth);\n}\n\n/**\n * Simple flat clone using prototype, accepts only objects, usefull for property\n * override on FLAT configuration object (no nested props).\n *\n * USE WITH CAUTION! This may not behave as you wish if you do not know how this\n * works.\n */\nclone.clonePrototype = function clonePrototype(parent) {\n if (parent === null)\n return null;\n\n var c = function () {};\n c.prototype = parent;\n return new c();\n};\n\n// private utility functions\n\nfunction __objToStr(o) {\n return Object.prototype.toString.call(o);\n}\nclone.__objToStr = __objToStr;\n\nfunction __isDate(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Date]';\n}\nclone.__isDate = __isDate;\n\nfunction __isArray(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Array]';\n}\nclone.__isArray = __isArray;\n\nfunction __isRegExp(o) {\n return typeof o === 'object' && __objToStr(o) === '[object RegExp]';\n}\nclone.__isRegExp = __isRegExp;\n\nfunction __getRegExpFlags(re) {\n var flags = '';\n if (re.global) flags += 'g';\n if (re.ignoreCase) flags += 'i';\n if (re.multiline) flags += 'm';\n return flags;\n}\nclone.__getRegExpFlags = __getRegExpFlags;\n\nreturn clone;\n})();\n\nif (typeof module === 'object' && module.exports) {\n module.exports = clone;\n}\n","/* jshint proto: true */\nimport * as Constants from './constants';\nimport CloneHelper from 'clone';\n\nexport function getLocation(index, inputStream) {\n let n = index + 1;\n let line = null;\n let column = -1;\n\n while (--n >= 0 && inputStream.charAt(n) !== '\\n') {\n column++;\n }\n\n if (typeof index === 'number') {\n line = (inputStream.slice(0, index).match(/\\n/g) || '').length;\n }\n\n return {\n line,\n column\n };\n}\nexport function copyArray(arr) {\n let i;\n const length = arr.length;\n const copy = new Array(length);\n\n for (i = 0; i < length; i++) {\n copy[i] = arr[i];\n }\n return copy;\n}\nexport function clone(obj) {\n const cloned = {};\n for (const prop in obj) {\n if (obj.hasOwnProperty(prop)) {\n cloned[prop] = obj[prop];\n }\n }\n return cloned;\n}\nexport function copyOptions(obj1, obj2) {\n if (obj2 && obj2._defaults) {\n return obj2;\n }\n const opts = utils.defaults(obj1, obj2);\n if (opts.strictMath) {\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n // Back compat with changed relativeUrls option\n if (opts.relativeUrls) {\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n }\n if (typeof opts.math === 'string') {\n switch (opts.math.toLowerCase()) {\n case 'always':\n opts.math = Constants.Math.ALWAYS;\n break;\n case 'parens-division':\n opts.math = Constants.Math.PARENS_DIVISION;\n break;\n case 'strict':\n case 'parens':\n opts.math = Constants.Math.PARENS;\n break;\n case 'strict-legacy':\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n }\n if (typeof opts.rewriteUrls === 'string') {\n switch (opts.rewriteUrls.toLowerCase()) {\n case 'off':\n opts.rewriteUrls = Constants.RewriteUrls.OFF;\n break;\n case 'local':\n opts.rewriteUrls = Constants.RewriteUrls.LOCAL;\n break;\n case 'all':\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n break;\n }\n }\n return opts;\n}\nexport function defaults(obj1, obj2) {\n let newObj = obj2 || {};\n if (!obj2._defaults) {\n newObj = {};\n const defaults = CloneHelper(obj1);\n newObj._defaults = defaults;\n const cloned = obj2 ? CloneHelper(obj2) : {};\n Object.assign(newObj, defaults, cloned);\n }\n return newObj;\n}\nexport function merge(obj1, obj2) {\n for (const prop in obj2) {\n if (obj2.hasOwnProperty(prop)) {\n obj1[prop] = obj2[prop];\n }\n }\n return obj1;\n}\nexport function flattenArray(arr, result = []) {\n for (let i = 0, length = arr.length; i < length; i++) {\n const value = arr[i];\n if (Array.isArray(value)) {\n utils.flattenArray(value, result);\n } else {\n if (value !== undefined) {\n result.push(value);\n }\n }\n }\n return result;\n}","import * as utils from './utils';\n/**\n * This is a centralized class of any error that could be thrown internally (mostly by the parser).\n * Besides standard .message it keeps some additional data like a path to the file where the error\n * occurred along with line and column numbers.\n *\n * @class\n * @extends Error\n * @type {module.LessError}\n *\n * @prop {string} type\n * @prop {string} filename\n * @prop {number} index\n * @prop {number} line\n * @prop {number} column\n * @prop {number} callLine\n * @prop {number} callExtract\n * @prop {string[]} extract\n *\n * @param {Object} e - An error object to wrap around or just a descriptive object\n * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager?\n * @param {string} [currentFilename]\n */\nconst LessError = function LessError(e, fileContentMap, currentFilename) {\n Error.call(this);\n\n const filename = e.filename || currentFilename;\n\n this.message = e.message;\n this.stack = e.stack;\n\n if (fileContentMap && filename) {\n const input = fileContentMap.contents[filename];\n const loc = utils.getLocation(e.index, input);\n const line = loc.line;\n const col = loc.column;\n const callLine = e.call && utils.getLocation(e.call, input).line;\n const lines = input ? input.split('\\n') : '';\n\n this.type = e.type || 'Syntax';\n this.filename = filename;\n this.index = e.index;\n this.line = typeof line === 'number' ? line + 1 : null;\n this.column = col;\n\n if (!this.line && this.stack) {\n const found = this.stack.match(/(|Function):(\\d+):(\\d+)/);\n\n if (found) {\n if (found[2]) {\n this.line = parseInt(found[2]) - 2;\n }\n if (found[3]) {\n this.column = parseInt(found[3]);\n }\n }\n }\n\n this.callLine = callLine + 1;\n this.callExtract = lines[callLine];\n\n this.extract = [\n lines[this.line - 2],\n lines[this.line - 1],\n lines[this.line]\n ];\n }\n\n};\n\nif (typeof Object.create === 'undefined') {\n const F = () => {};\n F.prototype = Error.prototype;\n LessError.prototype = new F();\n} else {\n LessError.prototype = Object.create(Error.prototype);\n}\n\nLessError.prototype.constructor = LessError;\n\n/**\n * An overridden version of the default Object.prototype.toString\n * which uses additional information to create a helpful message.\n *\n * @param {Object} options\n * @returns {string}\n */\nLessError.prototype.toString = function(options = {}) {\n let message = '';\n const extract = this.extract || [];\n let error = [];\n let stylize = str => str;\n if (options.stylize) {\n const type = typeof options.stylize;\n if (type !== 'function') {\n throw Error(`options.stylize should be a function, got a ${type}!`);\n }\n stylize = options.stylize;\n }\n\n if (this.line !== null) {\n if (typeof extract[0] === 'string') {\n error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey'));\n }\n\n if (typeof extract[1] === 'string') {\n let errorTxt = `${this.line} `;\n if (extract[1]) {\n errorTxt += extract[1].slice(0, this.column) +\n stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') +\n extract[1].slice(this.column + 1), 'red'), 'inverse');\n }\n error.push(errorTxt);\n }\n\n if (typeof extract[2] === 'string') {\n error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey'));\n }\n error = `${error.join('\\n') + stylize('', 'reset')}\\n`;\n }\n\n message += stylize(`${this.type}Error: ${this.message}`, 'red');\n if (this.filename) {\n message += stylize(' in ', 'red') + this.filename;\n }\n if (this.line) {\n message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey');\n }\n\n message += `\\n${error}`;\n\n if (this.callLine) {\n message += `${stylize('from ', 'red') + (this.filename || '')}/n`;\n message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`;\n }\n\n return message;\n};\n\nexport default LessError;","import Node from './node';\nimport Element from './element';\nimport LessError from '../less-error';\n\nclass Selector extends Node {\n constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) {\n this.extendList = extendList;\n this.condition = condition;\n this.evaldCondition = !condition;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.elements = this.getElements(elements);\n this.mixinElements_ = undefined;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.elements, this);\n }\n\n accept(visitor) {\n if (this.elements) {\n this.elements = visitor.visitArray(this.elements);\n }\n if (this.extendList) {\n this.extendList = visitor.visitArray(this.extendList);\n }\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n createDerived(elements, extendList, evaldCondition) {\n elements = this.getElements(elements);\n const newSelector = new Selector(elements, extendList || this.extendList,\n null, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition;\n newSelector.mediaEmpty = this.mediaEmpty;\n return newSelector;\n }\n\n getElements(els) {\n if (!els) {\n return [new Element('', '&', false, this._index, this._fileInfo)];\n }\n if (typeof els === 'string') {\n this.parse.parseNode(\n els, \n ['selector'],\n this._index, \n this._fileInfo, \n function(err, result) {\n if (err) {\n throw new LessError({\n index: err.index,\n message: err.message\n }, this.parse.imports, this._fileInfo.filename);\n }\n els = result[0].elements;\n });\n }\n return els;\n }\n\n createEmptySelectors() {\n const el = new Element('', '&', false, this._index, this._fileInfo);\n const sels = [new Selector([el], null, null, this._index, this._fileInfo)];\n sels[0].mediaEmpty = true;\n return sels;\n }\n\n match(other) {\n const elements = this.elements;\n const len = elements.length;\n let olen;\n let i;\n\n other = other.mixinElements();\n olen = other.length;\n if (olen === 0 || len < olen) {\n return 0;\n } else {\n for (i = 0; i < olen; i++) {\n if (elements[i].value !== other[i]) {\n return 0;\n }\n }\n }\n\n return olen; // return number of matched elements\n }\n\n mixinElements() {\n if (this.mixinElements_) {\n return this.mixinElements_;\n }\n\n let elements = this.elements.map( v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\\*\\.\\w-]([\\w-]|(\\\\.))*/g);\n\n if (elements) {\n if (elements[0] === '&') {\n elements.shift();\n }\n } else {\n elements = [];\n }\n\n return (this.mixinElements_ = elements);\n }\n\n isJustParentSelector() {\n return !this.mediaEmpty &&\n this.elements.length === 1 &&\n this.elements[0].value === '&' &&\n (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === '');\n }\n\n eval(context) {\n const evaldCondition = this.condition && this.condition.eval(context);\n let elements = this.elements;\n let extendList = this.extendList;\n\n elements = elements && elements.map(e => e.eval(context));\n extendList = extendList && extendList.map(extend => extend.eval(context));\n\n return this.createDerived(elements, extendList, evaldCondition);\n }\n\n genCSS(context, output) {\n let i;\n let element;\n if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') {\n output.add(' ', this.fileInfo(), this.getIndex());\n }\n for (i = 0; i < this.elements.length; i++) {\n element = this.elements[i];\n element.genCSS(context, output);\n }\n }\n\n getIsOutput() {\n return this.evaldCondition;\n }\n}\n\nSelector.prototype.type = 'Selector';\nexport default Selector;\n","import Node from './node';\n\nclass Value extends Node {\n constructor(value) {\n if (!value) {\n throw new Error('Value requires an array argument');\n }\n if (!Array.isArray(value)) {\n this.value = [ value ];\n }\n else {\n this.value = value;\n }\n }\n\n accept(visitor) {\n if (this.value) {\n this.value = visitor.visitArray(this.value);\n }\n }\n\n eval(context) {\n if (this.value.length === 1) {\n return this.value[0].eval(context);\n } else {\n return new Value(this.value.map(v => v.eval(context)));\n }\n }\n\n genCSS(context, output) {\n let i;\n for (i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (i + 1 < this.value.length) {\n output.add((context && context.compress) ? ',' : ', ');\n }\n }\n }\n}\n\nValue.prototype.type = 'Value';\nexport default Value;\n","import Node from './node';\n\nclass Keyword extends Node {\n constructor(value) { this.value = value; }\n\n genCSS(context, output) {\n if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; }\n output.add(this.value);\n }\n}\n\nKeyword.prototype.type = 'Keyword';\n\nKeyword.True = new Keyword('true');\nKeyword.False = new Keyword('false');\n\nexport default Keyword;\n","import Node from './node';\n\nclass Anonymous extends Node {\n constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) {\n this.value = value;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.mapLines = mapLines;\n this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike;\n this.allowRoot = true;\n this.copyVisibilityInfo(visibilityInfo);\n }\n\n eval() {\n return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo());\n }\n\n compare(other) {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n\n isRulesetLike() {\n return this.rulesetLike;\n }\n\n genCSS(context, output) {\n this.nodeVisible = Boolean(this.value);\n if (this.nodeVisible) {\n output.add(this.value, this._fileInfo, this._index, this.mapLines);\n }\n }\n}\n\nAnonymous.prototype.type = 'Anonymous';\nexport default Anonymous;\n","import Node from './node';\nimport Value from './value';\nimport Keyword from './keyword';\nimport Anonymous from './anonymous';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Declaration extends Node {\n constructor(name, value, important, merge, index, currentFileInfo, inline, variable) {\n this.name = name;\n this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]);\n this.important = important ? ` ${important.trim()}` : '';\n this.merge = merge;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.inline = inline || false;\n this.variable = (variable !== undefined) ? variable\n : (name.charAt && (name.charAt(0) === '@'));\n this.allowRoot = true;\n this.setParent(this.value, this);\n }\n\n genCSS(context, output) {\n output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex());\n try {\n this.value.genCSS(context, output);\n }\n catch (e) {\n e.index = this._index;\n e.filename = this._fileInfo.filename;\n throw e;\n }\n output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index);\n }\n\n eval(context) {\n let mathBypass = false;\n let prevMath;\n let name = this.name;\n let evaldValue;\n let variable = this.variable;\n if (typeof name !== 'string') {\n // expand 'primitive' name directly to get\n // things faster (~10% for benchmark.less):\n name = (name.length === 1) && (name[0] instanceof Keyword) ?\n name[0].value : evalName(context, name);\n variable = false; // never treat expanded interpolation as new variable name\n }\n\n // @todo remove when parens-division is default\n if (name === 'font' && context.math === MATH.ALWAYS) {\n mathBypass = true;\n prevMath = context.math;\n context.math = MATH.PARENS_DIVISION;\n }\n try {\n context.importantScope.push({});\n evaldValue = this.value.eval(context);\n\n if (!this.variable && evaldValue.type === 'DetachedRuleset') {\n throw { message: 'Rulesets cannot be evaluated on a property.',\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n let important = this.important;\n const importantResult = context.importantScope.pop();\n if (!important && importantResult.important) {\n important = importantResult.important;\n }\n\n return new Declaration(name,\n evaldValue,\n important,\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline,\n variable);\n }\n catch (e) {\n if (typeof e.index !== 'number') {\n e.index = this.getIndex();\n e.filename = this.fileInfo().filename;\n }\n throw e;\n }\n finally {\n if (mathBypass) {\n context.math = prevMath;\n }\n }\n }\n\n makeImportant() {\n return new Declaration(this.name,\n this.value,\n '!important',\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline);\n }\n}\n\nfunction evalName(context, name) {\n let value = '';\n let i;\n const n = name.length;\n const output = {add: function (s) {value += s;}};\n for (i = 0; i < n; i++) {\n name[i].eval(context).genCSS(context, output);\n }\n return value;\n}\n\nDeclaration.prototype.type = 'Declaration';\nexport default Declaration;","const debugInfo = (context, ctx, lineSeparator) => {\n let result = '';\n if (context.dumpLineNumbers && !context.compress) {\n switch (context.dumpLineNumbers) {\n case 'comments':\n result = debugInfo.asComment(ctx);\n break;\n case 'mediaquery':\n result = debugInfo.asMediaQuery(ctx);\n break;\n case 'all':\n result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx);\n break;\n }\n }\n return result;\n};\n\ndebugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\\n`;\n\ndebugInfo.asMediaQuery = ctx => {\n let filenameWithProtocol = ctx.debugInfo.fileName;\n if (!/^[a-z]+:\\/\\//i.test(filenameWithProtocol)) {\n filenameWithProtocol = `file://${filenameWithProtocol}`;\n }\n return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\\/\\\\])/g, a => {\n if (a == '\\\\') {\n a = '\\/';\n }\n return `\\\\${a}`;\n})}}line{font-family:\\\\00003${ctx.debugInfo.lineNumber}}}\\n`;\n};\n\nexport default debugInfo;\n","import Node from './node';\nimport getDebugInfo from './debug-info';\n\nclass Comment extends Node {\n constructor(value, isLineComment, index, currentFileInfo) {\n this.value = value;\n this.isLineComment = isLineComment;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n genCSS(context, output) {\n if (this.debugInfo) {\n output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n }\n\n isSilent(context) {\n const isCompressed = context.compress && this.value[2] !== '!';\n return this.isLineComment || isCompressed;\n }\n}\n\nComment.prototype.type = 'Comment';\nexport default Comment;\n","const contexts = {};\nexport default contexts;\nimport * as Constants from './constants';\n\nconst copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) {\n if (!original) { return; }\n\n for (let i = 0; i < propertiesToCopy.length; i++) {\n if (original.hasOwnProperty(propertiesToCopy[i])) {\n destination[propertiesToCopy[i]] = original[propertiesToCopy[i]];\n }\n }\n};\n\n/*\n parse is used whilst parsing\n */\nconst parseCopyProperties = [\n // options\n 'paths', // option - unmodified - paths to search for imports on\n 'rewriteUrls', // option - whether to adjust URL's to be relative\n 'rootpath', // option - rootpath to append to URL's\n 'strictImports', // option -\n 'insecure', // option - whether to allow imports from insecure ssl hosts\n 'dumpLineNumbers', // option - whether to dump line numbers\n 'compress', // option - whether to compress\n 'syncImport', // option - whether to import synchronously\n 'chunkInput', // option - whether to chunk input. more performant but causes parse issues.\n 'mime', // browser only - mime type for sheet import\n 'useFileCache', // browser only - whether to use the per file session cache\n // context\n 'processImports', // option & context - whether to process imports. if false then imports will not be imported.\n // Used by the import manager to stop multiple import visitors being created.\n 'pluginManager' // Used as the plugin manager for the session\n];\n\ncontexts.Parse = function(options) {\n copyFromOriginal(options, this, parseCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n};\n\nconst evalCopyProperties = [\n 'paths', // additional include paths\n 'compress', // whether to compress\n 'ieCompat', // whether to enforce IE compatibility (IE8 data-uri)\n 'math', // whether math has to be within parenthesis\n 'strictUnits', // whether units need to evaluate correctly\n 'sourceMap', // whether to output a source map\n 'importMultiple', // whether we are currently importing multiple copies\n 'urlArgs', // whether to add args into url tokens\n 'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false\n 'pluginManager', // Used as the plugin manager for the session\n 'importantScope', // used to bubble up !important statements\n 'rewriteUrls' // option - whether to adjust URL's to be relative\n];\n\ncontexts.Eval = function(options, frames) {\n copyFromOriginal(options, this, evalCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n\n this.frames = frames || [];\n this.importantScope = this.importantScope || [];\n};\n\ncontexts.Eval.prototype.enterCalc = function () {\n if (!this.calcStack) {\n this.calcStack = [];\n }\n this.calcStack.push(true);\n this.inCalc = true;\n};\n\ncontexts.Eval.prototype.exitCalc = function () {\n this.calcStack.pop();\n if (!this.calcStack) {\n this.inCalc = false;\n }\n};\n\ncontexts.Eval.prototype.inParenthesis = function () {\n if (!this.parensStack) {\n this.parensStack = [];\n }\n this.parensStack.push(true);\n};\n\ncontexts.Eval.prototype.outOfParenthesis = function () {\n this.parensStack.pop();\n};\n\ncontexts.Eval.prototype.inCalc = false;\ncontexts.Eval.prototype.mathOn = true;\ncontexts.Eval.prototype.isMathOn = function (op) {\n if (!this.mathOn) {\n return false;\n }\n if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) {\n return false;\n }\n if (this.math > Constants.Math.PARENS_DIVISION) {\n return this.parensStack && this.parensStack.length;\n }\n return true;\n};\n\ncontexts.Eval.prototype.pathRequiresRewrite = function (path) {\n const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative;\n\n return isRelative(path);\n};\n\ncontexts.Eval.prototype.rewritePath = function (path, rootpath) {\n let newPath;\n\n rootpath = rootpath || '';\n newPath = this.normalizePath(rootpath + path);\n\n // If a path was explicit relative and the rootpath was not an absolute path\n // we must ensure that the new path is also explicit relative.\n if (isPathLocalRelative(path) &&\n isPathRelative(rootpath) &&\n isPathLocalRelative(newPath) === false) {\n newPath = `./${newPath}`;\n }\n\n return newPath;\n};\n\ncontexts.Eval.prototype.normalizePath = path => {\n const segments = path.split('/').reverse();\n let segment;\n\n path = [];\n while (segments.length !== 0) {\n segment = segments.pop();\n switch ( segment ) {\n case '.':\n break;\n case '..':\n if ((path.length === 0) || (path[path.length - 1] === '..')) {\n path.push( segment );\n } else {\n path.pop();\n }\n break;\n default:\n path.push(segment);\n break;\n }\n }\n\n return path.join('/');\n};\n\nfunction isPathRelative(path) {\n return !/^(?:[a-z-]+:|\\/|#)/i.test(path);\n}\n\nfunction isPathLocalRelative(path) {\n return path.charAt(0) === '.';\n}\n\n// todo - do the same for the toCSS ?\n","function makeRegistry( base ) {\n return {\n _data: {},\n add: function(name, func) {\n // precautionary case conversion, as later querying of\n // the registry by function-caller uses lower case as well.\n name = name.toLowerCase();\n\n if (this._data.hasOwnProperty(name)) {\n // TODO warn\n }\n this._data[name] = func;\n },\n addMultiple: function(functions) {\n Object.keys(functions).forEach(\n name => {\n this.add(name, functions[name]);\n });\n },\n get: function(name) {\n return this._data[name] || ( base && base.get( name ));\n },\n getLocalFunctions: function() {\n return this._data;\n },\n inherit: function() {\n return makeRegistry( this );\n },\n create: function(base) {\n return makeRegistry(base);\n }\n };\n}\n\nexport default makeRegistry( null );","import Keyword from '../tree/keyword';\n\nconst defaultFunc = {\n eval: function () {\n const v = this.value_;\n const e = this.error_;\n if (e) {\n throw e;\n }\n if (v != null) {\n return v ? Keyword.True : Keyword.False;\n }\n },\n value: function (v) {\n this.value_ = v;\n },\n error: function (e) {\n this.error_ = e;\n },\n reset: function () {\n this.value_ = this.error_ = null;\n }\n};\n\nexport default { 'default': defaultFunc.eval.bind(defaultFunc) };\n","import Node from './node';\nimport Declaration from './declaration';\nimport Keyword from './keyword';\nimport Comment from './comment';\nimport Paren from './paren';\nimport Selector from './selector';\nimport Element from './element';\nimport Anonymous from './anonymous';\nimport contexts from '../contexts';\nimport globalFunctionRegistry from '../functions/function-registry';\nimport defaultFunc from '../functions/default';\nimport getDebugInfo from './debug-info';\nimport * as utils from '../utils';\n\nclass Ruleset extends Node {\n constructor(selectors, rules, strictImports, visibilityInfo) {\n this.selectors = selectors;\n this.rules = rules;\n this._lookups = {};\n this._variables = null;\n this._properties = null;\n this.strictImports = strictImports;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n this.setParent(this.selectors, this);\n this.setParent(this.rules, this);\n\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.paths) {\n this.paths = visitor.visitArray(this.paths, true);\n } else if (this.selectors) {\n this.selectors = visitor.visitArray(this.selectors);\n }\n if (this.rules && this.rules.length) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n eval(context) {\n const that = this;\n let selectors;\n let selCnt;\n let selector;\n let i;\n let hasVariable;\n let hasOnePassingSelector = false;\n\n if (this.selectors && (selCnt = this.selectors.length)) {\n selectors = new Array(selCnt);\n defaultFunc.error({\n type: 'Syntax',\n message: 'it is currently only allowed in parametric mixin guards,'\n });\n\n for (i = 0; i < selCnt; i++) {\n selector = this.selectors[i].eval(context);\n for (var j = 0; j < selector.elements.length; j++) {\n if (selector.elements[j].isVariable) {\n hasVariable = true;\n break;\n }\n }\n selectors[i] = selector;\n if (selector.evaldCondition) {\n hasOnePassingSelector = true;\n }\n }\n\n if (hasVariable) {\n const toParseSelectors = new Array(selCnt);\n for (i = 0; i < selCnt; i++) {\n selector = selectors[i];\n toParseSelectors[i] = selector.toCSS(context);\n }\n this.parse.parseNode(\n toParseSelectors.join(','),\n [\"selectors\"], \n selectors[0].getIndex(), \n selectors[0].fileInfo(), \n (err, result) => {\n if (result) {\n selectors = utils.flattenArray(result);\n }\n });\n }\n\n defaultFunc.reset();\n } else {\n hasOnePassingSelector = true;\n }\n\n let rules = this.rules ? utils.copyArray(this.rules) : null;\n const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo());\n let rule;\n let subRule;\n\n ruleset.originalRuleset = this;\n ruleset.root = this.root;\n ruleset.firstRoot = this.firstRoot;\n ruleset.allowImports = this.allowImports;\n\n if (this.debugInfo) {\n ruleset.debugInfo = this.debugInfo;\n }\n\n if (!hasOnePassingSelector) {\n rules.length = 0;\n }\n\n // inherit a function registry from the frames stack when possible;\n // otherwise from the global registry\n ruleset.functionRegistry = (frames => {\n let i = 0;\n const n = frames.length;\n let found;\n for ( ; i !== n ; ++i ) {\n found = frames[ i ].functionRegistry;\n if ( found ) { return found; }\n }\n return globalFunctionRegistry;\n })(context.frames).inherit();\n\n // push the current ruleset to the frames stack\n const ctxFrames = context.frames;\n ctxFrames.unshift(ruleset);\n\n // currrent selectors\n let ctxSelectors = context.selectors;\n if (!ctxSelectors) {\n context.selectors = ctxSelectors = [];\n }\n ctxSelectors.unshift(this.selectors);\n\n // Evaluate imports\n if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {\n ruleset.evalImports(context);\n }\n\n // Store the frames around mixin definitions,\n // so they can be evaluated like closures when the time comes.\n const rsRules = ruleset.rules;\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.evalFirst) {\n rsRules[i] = rule.eval(context);\n }\n }\n\n const mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0;\n\n // Evaluate mixin calls.\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.type === 'MixinCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope if the variable is\n // already there. consider returning false here\n // but we need a way to \"return\" variable from mixins\n return !(ruleset.variable(r.name));\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n } else if (rule.type === 'VariableCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).rules.filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope at all\n return false;\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n if (!rule.evalFirst) {\n rsRules[i] = rule = rule.eval ? rule.eval(context) : rule;\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n // for rulesets, check if it is a css guard and can be removed\n if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) {\n // check if it can be folded in (e.g. & where)\n if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) {\n rsRules.splice(i--, 1);\n\n for (var j = 0; (subRule = rule.rules[j]); j++) {\n if (subRule instanceof Node) {\n subRule.copyVisibilityInfo(rule.visibilityInfo());\n if (!(subRule instanceof Declaration) || !subRule.variable) {\n rsRules.splice(++i, 0, subRule);\n }\n }\n }\n }\n }\n }\n\n // Pop the stack\n ctxFrames.shift();\n ctxSelectors.shift();\n\n if (context.mediaBlocks) {\n for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) {\n context.mediaBlocks[i].bubbleSelectors(selectors);\n }\n }\n\n return ruleset;\n }\n\n evalImports(context) {\n const rules = this.rules;\n let i;\n let importRules;\n if (!rules) { return; }\n\n for (i = 0; i < rules.length; i++) {\n if (rules[i].type === 'Import') {\n importRules = rules[i].eval(context);\n if (importRules && (importRules.length || importRules.length === 0)) {\n rules.splice(...[i, 1].concat(importRules));\n i += importRules.length - 1;\n } else {\n rules.splice(i, 1, importRules);\n }\n this.resetCache();\n }\n }\n }\n\n makeImportant() {\n const result = new Ruleset(this.selectors, this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant();\n } else {\n return r;\n }\n }), this.strictImports, this.visibilityInfo());\n\n return result;\n }\n\n matchArgs(args) {\n return !args || args.length === 0;\n }\n\n // lets you call a css selector with a guard\n matchCondition(args, context) {\n const lastSelector = this.selectors[this.selectors.length - 1];\n if (!lastSelector.evaldCondition) {\n return false;\n }\n if (lastSelector.condition &&\n !lastSelector.condition.eval(\n new contexts.Eval(context,\n context.frames))) {\n return false;\n }\n return true;\n }\n\n resetCache() {\n this._rulesets = null;\n this._variables = null;\n this._properties = null;\n this._lookups = {};\n }\n\n variables() {\n if (!this._variables) {\n this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable === true) {\n hash[r.name] = r;\n }\n // when evaluating variables in an import statement, imports have not been eval'd\n // so we need to go inside import statements.\n // guard against root being a string (in the case of inlined less)\n if (r.type === 'Import' && r.root && r.root.variables) {\n const vars = r.root.variables();\n for (const name in vars) {\n if (vars.hasOwnProperty(name)) {\n hash[name] = r.root.variable(name);\n }\n }\n }\n return hash;\n }, {});\n }\n return this._variables;\n }\n\n properties() {\n if (!this._properties) {\n this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable !== true) {\n const name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ?\n r.name[0].value : r.name;\n // Properties don't overwrite as they can merge\n if (!hash[`$${name}`]) {\n hash[`$${name}`] = [ r ];\n }\n else {\n hash[`$${name}`].push(r);\n }\n }\n return hash;\n }, {});\n }\n return this._properties;\n }\n\n variable(name) {\n const decl = this.variables()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n property(name) {\n const decl = this.properties()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n lastDeclaration() {\n for (let i = this.rules.length; i > 0; i--) {\n const decl = this.rules[i - 1];\n if (decl instanceof Declaration) {\n return this.parseValue(decl);\n }\n }\n }\n\n parseValue(toParse) {\n const self = this;\n function transformDeclaration(decl) {\n if (decl.value instanceof Anonymous && !decl.parsed) {\n if (typeof decl.value.value === 'string') {\n this.parse.parseNode(\n decl.value.value,\n ['value', 'important'], \n decl.value.getIndex(), \n decl.fileInfo(), \n (err, result) => {\n if (err) {\n decl.parsed = true;\n }\n if (result) {\n decl.value = result[0];\n decl.important = result[1] || '';\n decl.parsed = true;\n }\n });\n } else {\n decl.parsed = true;\n }\n\n return decl;\n }\n else {\n return decl;\n }\n }\n if (!Array.isArray(toParse)) {\n return transformDeclaration.call(self, toParse);\n }\n else {\n const nodes = [];\n toParse.forEach(n => {\n nodes.push(transformDeclaration.call(self, n));\n });\n return nodes;\n }\n }\n\n rulesets() {\n if (!this.rules) { return []; }\n\n const filtRules = [];\n const rules = this.rules;\n let i;\n let rule;\n\n for (i = 0; (rule = rules[i]); i++) {\n if (rule.isRuleset) {\n filtRules.push(rule);\n }\n }\n\n return filtRules;\n }\n\n prependRule(rule) {\n const rules = this.rules;\n if (rules) {\n rules.unshift(rule);\n } else {\n this.rules = [ rule ];\n }\n this.setParent(rule, this);\n }\n\n find(selector, self = this, filter) {\n const rules = [];\n let match;\n let foundMixins;\n const key = selector.toCSS();\n\n if (key in this._lookups) { return this._lookups[key]; }\n\n this.rulesets().forEach(rule => {\n if (rule !== self) {\n for (let j = 0; j < rule.selectors.length; j++) {\n match = selector.match(rule.selectors[j]);\n if (match) {\n if (selector.elements.length > match) {\n if (!filter || filter(rule)) {\n foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter);\n for (let i = 0; i < foundMixins.length; ++i) {\n foundMixins[i].path.push(rule);\n }\n Array.prototype.push.apply(rules, foundMixins);\n }\n } else {\n rules.push({ rule, path: []});\n }\n break;\n }\n }\n }\n });\n this._lookups[key] = rules;\n return rules;\n }\n\n genCSS(context, output) {\n let i;\n let j;\n const charsetRuleNodes = [];\n let ruleNodes = [];\n\n let // Line number debugging\n debugInfo;\n\n let rule;\n let path;\n\n context.tabLevel = (context.tabLevel || 0);\n\n if (!this.root) {\n context.tabLevel++;\n }\n\n const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' ');\n const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' ');\n let sep;\n\n let charsetNodeIndex = 0;\n let importNodeIndex = 0;\n for (i = 0; (rule = this.rules[i]); i++) {\n if (rule instanceof Comment) {\n if (importNodeIndex === i) {\n importNodeIndex++;\n }\n ruleNodes.push(rule);\n } else if (rule.isCharset && rule.isCharset()) {\n ruleNodes.splice(charsetNodeIndex, 0, rule);\n charsetNodeIndex++;\n importNodeIndex++;\n } else if (rule.type === 'Import') {\n ruleNodes.splice(importNodeIndex, 0, rule);\n importNodeIndex++;\n } else {\n ruleNodes.push(rule);\n }\n }\n ruleNodes = charsetRuleNodes.concat(ruleNodes);\n\n // If this is the root node, we don't render\n // a selector, or {}.\n if (!this.root) {\n debugInfo = getDebugInfo(context, this, tabSetStr);\n\n if (debugInfo) {\n output.add(debugInfo);\n output.add(tabSetStr);\n }\n\n const paths = this.paths;\n const pathCnt = paths.length;\n let pathSubCnt;\n\n sep = context.compress ? ',' : (`,\\n${tabSetStr}`);\n\n for (i = 0; i < pathCnt; i++) {\n path = paths[i];\n if (!(pathSubCnt = path.length)) { continue; }\n if (i > 0) { output.add(sep); }\n\n context.firstSelector = true;\n path[0].genCSS(context, output);\n\n context.firstSelector = false;\n for (j = 1; j < pathSubCnt; j++) {\n path[j].genCSS(context, output);\n }\n }\n\n output.add((context.compress ? '{' : ' {\\n') + tabRuleStr);\n }\n\n // Compile rules and rulesets\n for (i = 0; (rule = ruleNodes[i]); i++) {\n\n if (i + 1 === ruleNodes.length) {\n context.lastRule = true;\n }\n\n const currentLastRule = context.lastRule;\n if (rule.isRulesetLike(rule)) {\n context.lastRule = false;\n }\n\n if (rule.genCSS) {\n rule.genCSS(context, output);\n } else if (rule.value) {\n output.add(rule.value.toString());\n }\n\n context.lastRule = currentLastRule;\n\n if (!context.lastRule && rule.isVisible()) {\n output.add(context.compress ? '' : (`\\n${tabRuleStr}`));\n } else {\n context.lastRule = false;\n }\n }\n\n if (!this.root) {\n output.add((context.compress ? '}' : `\\n${tabSetStr}}`));\n context.tabLevel--;\n }\n\n if (!output.isEmpty() && !context.compress && this.firstRoot) {\n output.add('\\n');\n }\n }\n\n joinSelectors(paths, context, selectors) {\n for (let s = 0; s < selectors.length; s++) {\n this.joinSelector(paths, context, selectors[s]);\n }\n }\n\n joinSelector(paths, context, selector) {\n function createParenthesis(elementsToPak, originalElement) {\n let replacementParen;\n let j;\n if (elementsToPak.length === 0) {\n replacementParen = new Paren(elementsToPak[0]);\n } else {\n const insideParent = new Array(elementsToPak.length);\n for (j = 0; j < elementsToPak.length; j++) {\n insideParent[j] = new Element(\n null,\n elementsToPak[j],\n originalElement.isVariable,\n originalElement._index,\n originalElement._fileInfo\n );\n }\n replacementParen = new Paren(new Selector(insideParent));\n }\n return replacementParen;\n }\n\n function createSelector(containedElement, originalElement) {\n let element;\n let selector;\n element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo);\n selector = new Selector([element]);\n return selector;\n }\n\n // joins selector path from `beginningPath` with selector path in `addPath`\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns concatenated path\n function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) {\n let newSelectorPath;\n let lastSelector;\n let newJoinedSelector;\n // our new selector path\n newSelectorPath = [];\n\n // construct the joined selector - if & is the first thing this will be empty,\n // if not newJoinedSelector will be the last set of elements in the selector\n if (beginningPath.length > 0) {\n newSelectorPath = utils.copyArray(beginningPath);\n lastSelector = newSelectorPath.pop();\n newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements));\n }\n else {\n newJoinedSelector = originalSelector.createDerived([]);\n }\n\n if (addPath.length > 0) {\n // /deep/ is a CSS4 selector - (removed, so should deprecate)\n // that is valid without anything in front of it\n // so if the & does not have a combinator that is \"\" or \" \" then\n // and there is a combinator on the parent, then grab that.\n // this also allows + a { & .b { .a & { ... though not sure why you would want to do that\n let combinator = replacedElement.combinator;\n\n const parentEl = addPath[0].elements[0];\n if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) {\n combinator = parentEl.combinator;\n }\n // join the elements so far with the first part of the parent\n newJoinedSelector.elements.push(new Element(\n combinator,\n parentEl.value,\n replacedElement.isVariable,\n replacedElement._index,\n replacedElement._fileInfo\n ));\n newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1));\n }\n\n // now add the joined selector - but only if it is not empty\n if (newJoinedSelector.elements.length !== 0) {\n newSelectorPath.push(newJoinedSelector);\n }\n\n // put together the parent selectors after the join (e.g. the rest of the parent)\n if (addPath.length > 1) {\n let restOfPath = addPath.slice(1);\n restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, []));\n newSelectorPath = newSelectorPath.concat(restOfPath);\n }\n return newSelectorPath;\n }\n\n // joins selector path from `beginningPath` with every selector path in `addPaths` array\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns array with all concatenated paths\n function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) {\n let j;\n for (j = 0; j < beginningPath.length; j++) {\n const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector);\n result.push(newSelectorPath);\n }\n return result;\n }\n\n function mergeElementsOnToSelectors(elements, selectors) {\n let i;\n let sel;\n\n if (elements.length === 0) {\n return ;\n }\n if (selectors.length === 0) {\n selectors.push([ new Selector(elements) ]);\n return;\n }\n\n for (i = 0; (sel = selectors[i]); i++) {\n // if the previous thing in sel is a parent this needs to join on to it\n if (sel.length > 0) {\n sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements));\n }\n else {\n sel.push(new Selector(elements));\n }\n }\n }\n\n // replace all parent selectors inside `inSelector` by content of `context` array\n // resulting selectors are returned inside `paths` array\n // returns true if `inSelector` contained at least one parent selector\n function replaceParentSelector(paths, context, inSelector) {\n // The paths are [[Selector]]\n // The first list is a list of comma separated selectors\n // The inner list is a list of inheritance separated selectors\n // e.g.\n // .a, .b {\n // .c {\n // }\n // }\n // == [[.a] [.c]] [[.b] [.c]]\n //\n let i;\n\n let j;\n let k;\n let currentElements;\n let newSelectors;\n let selectorsMultiplied;\n let sel;\n let el;\n let hadParentSelector = false;\n let length;\n let lastSelector;\n function findNestedSelector(element) {\n let maybeSelector;\n if (!(element.value instanceof Paren)) {\n return null;\n }\n\n maybeSelector = element.value.value;\n if (!(maybeSelector instanceof Selector)) {\n return null;\n }\n\n return maybeSelector;\n }\n\n // the elements from the current selector so far\n currentElements = [];\n // the current list of new selectors to add to the path.\n // We will build it up. We initiate it with one empty selector as we \"multiply\" the new selectors\n // by the parents\n newSelectors = [\n []\n ];\n\n for (i = 0; (el = inSelector.elements[i]); i++) {\n // non parent reference elements just get added\n if (el.value !== '&') {\n const nestedSelector = findNestedSelector(el);\n if (nestedSelector != null) {\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n const nestedPaths = [];\n let replaced;\n const replacedNewSelectors = [];\n replaced = replaceParentSelector(nestedPaths, context, nestedSelector);\n hadParentSelector = hadParentSelector || replaced;\n // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors\n for (k = 0; k < nestedPaths.length; k++) {\n const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el);\n addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors);\n }\n newSelectors = replacedNewSelectors;\n currentElements = [];\n } else {\n currentElements.push(el);\n }\n\n } else {\n hadParentSelector = true;\n // the new list of selectors to add\n selectorsMultiplied = [];\n\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n // loop through our current selectors\n for (j = 0; j < newSelectors.length; j++) {\n sel = newSelectors[j];\n // if we don't have any parent paths, the & might be in a mixin so that it can be used\n // whether there are parents or not\n if (context.length === 0) {\n // the combinator used on el should now be applied to the next element instead so that\n // it is not lost\n if (sel.length > 0) {\n sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo));\n }\n selectorsMultiplied.push(sel);\n }\n else {\n // and the parent selectors\n for (k = 0; k < context.length; k++) {\n // We need to put the current selectors\n // then join the last selector's elements on to the parents selectors\n const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector);\n // add that to our new set of selectors\n selectorsMultiplied.push(newSelectorPath);\n }\n }\n }\n\n // our new selectors has been multiplied, so reset the state\n newSelectors = selectorsMultiplied;\n currentElements = [];\n }\n }\n\n // if we have any elements left over (e.g. .a& .b == .b)\n // add them on to all the current selectors\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n for (i = 0; i < newSelectors.length; i++) {\n length = newSelectors[i].length;\n if (length > 0) {\n paths.push(newSelectors[i]);\n lastSelector = newSelectors[i][length - 1];\n newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList);\n }\n }\n\n return hadParentSelector;\n }\n\n function deriveSelector(visibilityInfo, deriveFrom) {\n const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition);\n newSelector.copyVisibilityInfo(visibilityInfo);\n return newSelector;\n }\n\n // joinSelector code follows\n let i;\n\n let newPaths;\n let hadParentSelector;\n\n newPaths = [];\n hadParentSelector = replaceParentSelector(newPaths, context, selector);\n\n if (!hadParentSelector) {\n if (context.length > 0) {\n newPaths = [];\n for (i = 0; i < context.length; i++) {\n\n const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo()));\n\n concatenated.push(selector);\n newPaths.push(concatenated);\n }\n }\n else {\n newPaths = [[selector]];\n }\n }\n\n for (i = 0; i < newPaths.length; i++) {\n paths.push(newPaths[i]);\n }\n }\n}\n\nRuleset.prototype.type = 'Ruleset';\nRuleset.prototype.isRuleset = true;\nexport default Ruleset;\n","import Node from './node';\nimport Selector from './selector';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\n\nclass AtRule extends Node {\n constructor(\n name,\n value,\n rules,\n index,\n currentFileInfo,\n debugInfo,\n isRooted,\n visibilityInfo\n ) {\n let i;\n\n this.name = name;\n this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value);\n if (rules) {\n if (Array.isArray(rules)) {\n this.rules = rules;\n } else {\n this.rules = [rules];\n this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors();\n }\n for (i = 0; i < this.rules.length; i++) {\n this.rules[i].allowImports = true;\n }\n this.setParent(this.rules, this);\n }\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.debugInfo = debugInfo;\n this.isRooted = isRooted || false;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n const value = this.value;\n const rules = this.rules;\n if (rules) {\n this.rules = visitor.visitArray(rules);\n }\n if (value) {\n this.value = visitor.visit(value);\n }\n }\n\n isRulesetLike() {\n return this.rules || !this.isCharset();\n }\n\n isCharset() {\n return '@charset' === this.name;\n }\n\n genCSS(context, output) {\n const value = this.value;\n const rules = this.rules;\n output.add(this.name, this.fileInfo(), this.getIndex());\n if (value) {\n output.add(' ');\n value.genCSS(context, output);\n }\n if (rules) {\n this.outputRuleset(context, output, rules);\n } else {\n output.add(';');\n }\n }\n\n eval(context) {\n let mediaPathBackup;\n let mediaBlocksBackup;\n let value = this.value;\n let rules = this.rules;\n\n // media stored inside other atrule should not bubble over it\n // backpup media bubbling information\n mediaPathBackup = context.mediaPath;\n mediaBlocksBackup = context.mediaBlocks;\n // deleted media bubbling information\n context.mediaPath = [];\n context.mediaBlocks = [];\n\n if (value) {\n value = value.eval(context);\n }\n if (rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n rules = [rules[0].eval(context)];\n rules[0].root = true;\n }\n // restore media bubbling information\n context.mediaPath = mediaPathBackup;\n context.mediaBlocks = mediaBlocksBackup;\n\n return new AtRule(this.name, value, rules,\n this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo());\n }\n\n variable(name) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.variable.call(this.rules[0], name);\n }\n }\n\n find(...args) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.find.apply(this.rules[0], args);\n }\n }\n\n rulesets() {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.rulesets.apply(this.rules[0]);\n }\n }\n\n outputRuleset(context, output, rules) {\n const ruleCnt = rules.length;\n let i;\n context.tabLevel = (context.tabLevel | 0) + 1;\n\n // Compressed\n if (context.compress) {\n output.add('{');\n for (i = 0; i < ruleCnt; i++) {\n rules[i].genCSS(context, output);\n }\n output.add('}');\n context.tabLevel--;\n return;\n }\n\n // Non-compressed\n const tabSetStr = `\\n${Array(context.tabLevel).join(' ')}`;\n\n const tabRuleStr = `${tabSetStr} `;\n if (!ruleCnt) {\n output.add(` {${tabSetStr}}`);\n } else {\n output.add(` {${tabRuleStr}`);\n rules[0].genCSS(context, output);\n for (i = 1; i < ruleCnt; i++) {\n output.add(tabRuleStr);\n rules[i].genCSS(context, output);\n }\n output.add(`${tabSetStr}}`);\n }\n\n context.tabLevel--;\n }\n}\n\nAtRule.prototype.type = 'AtRule';\nexport default AtRule;\n","import Node from './node';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass DetachedRuleset extends Node {\n constructor(ruleset, frames) {\n this.ruleset = ruleset;\n this.frames = frames;\n this.setParent(this.ruleset, this);\n }\n\n accept(visitor) {\n this.ruleset = visitor.visit(this.ruleset);\n }\n\n eval(context) {\n const frames = this.frames || utils.copyArray(context.frames);\n return new DetachedRuleset(this.ruleset, frames);\n }\n\n callEval(context) {\n return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context);\n }\n}\n\nDetachedRuleset.prototype.type = 'DetachedRuleset';\nDetachedRuleset.prototype.evalFirst = true;\nexport default DetachedRuleset;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport * as utils from '../utils';\n\nclass Unit extends Node {\n constructor(numerator, denominator, backupUnit) {\n this.numerator = numerator ? utils.copyArray(numerator).sort() : [];\n this.denominator = denominator ? utils.copyArray(denominator).sort() : [];\n if (backupUnit) {\n this.backupUnit = backupUnit;\n } else if (numerator && numerator.length) {\n this.backupUnit = numerator[0];\n }\n }\n\n clone() {\n return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit);\n }\n\n genCSS(context, output) {\n // Dimension checks the unit is singular and throws an error if in strict math mode.\n const strictUnits = context && context.strictUnits;\n if (this.numerator.length === 1) {\n output.add(this.numerator[0]); // the ideal situation\n } else if (!strictUnits && this.backupUnit) {\n output.add(this.backupUnit);\n } else if (!strictUnits && this.denominator.length) {\n output.add(this.denominator[0]);\n }\n }\n\n toString() {\n let i;\n let returnStr = this.numerator.join('*');\n for (i = 0; i < this.denominator.length; i++) {\n returnStr += `/${this.denominator[i]}`;\n }\n return returnStr;\n }\n\n compare(other) {\n return this.is(other.toString()) ? 0 : undefined;\n }\n\n is(unitString) {\n return this.toString().toUpperCase() === unitString.toUpperCase();\n }\n\n isLength() {\n return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS());\n }\n\n isEmpty() {\n return this.numerator.length === 0 && this.denominator.length === 0;\n }\n\n isSingular() {\n return this.numerator.length <= 1 && this.denominator.length === 0;\n }\n\n map(callback) {\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n this.numerator[i] = callback(this.numerator[i], false);\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n this.denominator[i] = callback(this.denominator[i], true);\n }\n }\n\n usedUnits() {\n let group;\n const result = {};\n let mapUnit;\n let groupName;\n\n mapUnit = atomicUnit => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit) && !result[groupName]) {\n result[groupName] = atomicUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in unitConversions) {\n if (unitConversions.hasOwnProperty(groupName)) {\n group = unitConversions[groupName];\n\n this.map(mapUnit);\n }\n }\n\n return result;\n }\n\n cancel() {\n const counter = {};\n let atomicUnit;\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n atomicUnit = this.numerator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) + 1;\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n atomicUnit = this.denominator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) - 1;\n }\n\n this.numerator = [];\n this.denominator = [];\n\n for (atomicUnit in counter) {\n if (counter.hasOwnProperty(atomicUnit)) {\n const count = counter[atomicUnit];\n\n if (count > 0) {\n for (i = 0; i < count; i++) {\n this.numerator.push(atomicUnit);\n }\n } else if (count < 0) {\n for (i = 0; i < -count; i++) {\n this.denominator.push(atomicUnit);\n }\n }\n }\n }\n\n this.numerator.sort();\n this.denominator.sort();\n }\n}\n\nUnit.prototype.type = 'Unit';\nexport default Unit;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport Unit from './unit';\nimport Color from './color';\n\n//\n// A number with a unit\n//\nclass Dimension extends Node {\n constructor(value, unit) {\n this.value = parseFloat(value);\n if (isNaN(this.value)) {\n throw new Error('Dimension is not a number.');\n }\n this.unit = (unit && unit instanceof Unit) ? unit :\n new Unit(unit ? [unit] : undefined);\n this.setParent(this.unit, this);\n }\n\n accept(visitor) {\n this.unit = visitor.visit(this.unit);\n }\n\n eval(context) {\n return this;\n }\n\n toColor() {\n return new Color([this.value, this.value, this.value]);\n }\n\n genCSS(context, output) {\n if ((context && context.strictUnits) && !this.unit.isSingular()) {\n throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`);\n }\n\n const value = this.fround(context, this.value);\n let strValue = String(value);\n\n if (value !== 0 && value < 0.000001 && value > -0.000001) {\n // would be output 1e-6 etc.\n strValue = value.toFixed(20).replace(/0+$/, '');\n }\n\n if (context && context.compress) {\n // Zero values doesn't need a unit\n if (value === 0 && this.unit.isLength()) {\n output.add(strValue);\n return;\n }\n\n // Float values doesn't need a leading zero\n if (value > 0 && value < 1) {\n strValue = (strValue).substr(1);\n }\n }\n\n output.add(strValue);\n this.unit.genCSS(context, output);\n }\n\n // In an operation between two Dimensions,\n // we default to the first Dimension's unit,\n // so `1px + 2` will yield `3px`.\n operate(context, op, other) {\n /* jshint noempty:false */\n let value = this._operate(context, op, this.value, other.value);\n\n let unit = this.unit.clone();\n\n if (op === '+' || op === '-') {\n if (unit.numerator.length === 0 && unit.denominator.length === 0) {\n unit = other.unit.clone();\n if (this.unit.backupUnit) {\n unit.backupUnit = this.unit.backupUnit;\n }\n } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) {\n // do nothing\n } else {\n other = other.convertTo(this.unit.usedUnits());\n\n if (context.strictUnits && other.unit.toString() !== unit.toString()) {\n throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`);\n }\n\n value = this._operate(context, op, this.value, other.value);\n }\n } else if (op === '*') {\n unit.numerator = unit.numerator.concat(other.unit.numerator).sort();\n unit.denominator = unit.denominator.concat(other.unit.denominator).sort();\n unit.cancel();\n } else if (op === '/') {\n unit.numerator = unit.numerator.concat(other.unit.denominator).sort();\n unit.denominator = unit.denominator.concat(other.unit.numerator).sort();\n unit.cancel();\n }\n return new Dimension(value, unit);\n }\n\n compare(other) {\n let a;\n let b;\n\n if (!(other instanceof Dimension)) {\n return undefined;\n }\n\n if (this.unit.isEmpty() || other.unit.isEmpty()) {\n a = this;\n b = other;\n } else {\n a = this.unify();\n b = other.unify();\n if (a.unit.compare(b.unit) !== 0) {\n return undefined;\n }\n }\n\n return Node.numericCompare(a.value, b.value);\n }\n\n unify() {\n return this.convertTo({ length: 'px', duration: 's', angle: 'rad' });\n }\n\n convertTo(conversions) {\n let value = this.value;\n const unit = this.unit.clone();\n let i;\n let groupName;\n let group;\n let targetUnit;\n let derivedConversions = {};\n let applyUnit;\n\n if (typeof conversions === 'string') {\n for (i in unitConversions) {\n if (unitConversions[i].hasOwnProperty(conversions)) {\n derivedConversions = {};\n derivedConversions[i] = conversions;\n }\n }\n conversions = derivedConversions;\n }\n applyUnit = (atomicUnit, denominator) => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit)) {\n if (denominator) {\n value = value / (group[atomicUnit] / group[targetUnit]);\n } else {\n value = value * (group[atomicUnit] / group[targetUnit]);\n }\n\n return targetUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in conversions) {\n if (conversions.hasOwnProperty(groupName)) {\n targetUnit = conversions[groupName];\n group = unitConversions[groupName];\n\n unit.map(applyUnit);\n }\n }\n\n unit.cancel();\n\n return new Dimension(value, unit);\n }\n}\n\nDimension.prototype.type = 'Dimension';\nexport default Dimension;\n","import Node from './node';\nimport Color from './color';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Operation extends Node {\n constructor(op, operands, isSpaced) {\n this.op = op.trim();\n this.operands = operands;\n this.isSpaced = isSpaced;\n }\n\n accept(visitor) {\n this.operands = visitor.visitArray(this.operands);\n }\n\n eval(context) {\n let a = this.operands[0].eval(context);\n let b = this.operands[1].eval(context);\n let op;\n\n if (context.isMathOn(this.op)) {\n op = this.op === './' ? '/' : this.op;\n if (a instanceof Dimension && b instanceof Color) {\n a = a.toColor();\n }\n if (b instanceof Dimension && a instanceof Color) {\n b = b.toColor();\n }\n if (!a.operate) {\n if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n throw { type: 'Operation',\n message: 'Operation on an invalid type' };\n }\n\n return a.operate(context, op, b);\n } else {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n }\n\n genCSS(context, output) {\n this.operands[0].genCSS(context, output);\n if (this.isSpaced) {\n output.add(' ');\n }\n output.add(this.op);\n if (this.isSpaced) {\n output.add(' ');\n }\n this.operands[1].genCSS(context, output);\n }\n}\n\nOperation.prototype.type = 'Operation';\nexport default Operation;\n","import Node from './node';\nimport Paren from './paren';\nimport Comment from './comment';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\nclass Expression extends Node {\n constructor(value, noSpacing) {\n this.value = value;\n this.noSpacing = noSpacing;\n if (!value) {\n throw new Error('Expression requires an array parameter');\n }\n }\n\n accept(visitor) {\n this.value = visitor.visitArray(this.value);\n }\n\n eval(context) {\n let returnValue;\n const mathOn = context.isMathOn();\n\n const inParenthesis = this.parens && \n (context.math !== MATH.STRICT_LEGACY || !this.parensInOp);\n\n let doubleParen = false;\n if (inParenthesis) {\n context.inParenthesis();\n }\n if (this.value.length > 1) {\n returnValue = new Expression(this.value.map(e => {\n if (!e.eval) {\n return e;\n }\n return e.eval(context);\n }), this.noSpacing);\n } else if (this.value.length === 1) {\n if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) {\n doubleParen = true;\n }\n returnValue = this.value[0].eval(context);\n } else {\n returnValue = this;\n }\n if (inParenthesis) {\n context.outOfParenthesis();\n }\n if (this.parens && this.parensInOp && !mathOn && !doubleParen \n && (!(returnValue instanceof Dimension))) {\n returnValue = new Paren(returnValue);\n }\n return returnValue;\n }\n\n genCSS(context, output) {\n for (let i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (!this.noSpacing && i + 1 < this.value.length) {\n output.add(' ');\n }\n }\n }\n\n throwAwayComments() {\n this.value = this.value.filter(v => !(v instanceof Comment));\n }\n}\n\nExpression.prototype.type = 'Expression';\nexport default Expression;\n","import Expression from '../tree/expression';\n\nclass functionCaller {\n constructor(name, context, index, currentFileInfo) {\n this.name = name.toLowerCase();\n this.index = index;\n this.context = context;\n this.currentFileInfo = currentFileInfo;\n\n this.func = context.frames[0].functionRegistry.get(this.name);\n }\n\n isValid() {\n return Boolean(this.func);\n }\n\n call(args) {\n // This code is terrible and should be replaced as per this issue...\n // https://github.com/less/less.js/issues/2477\n if (Array.isArray(args)) {\n args = args.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n })\n .map(item => {\n if (item.type === 'Expression') {\n const subNodes = item.value.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n });\n if (subNodes.length === 1) {\n return subNodes[0];\n } else {\n return new Expression(subNodes);\n }\n }\n return item;\n });\n }\n\n return this.func(...args);\n }\n}\n\nexport default functionCaller;\n","import Node from './node';\nimport Anonymous from './anonymous';\nimport FunctionCaller from '../functions/function-caller';\n\n//\n// A function call node.\n//\nclass Call extends Node {\n constructor(name, args, index, currentFileInfo) {\n this.name = name;\n this.args = args;\n this.calc = name === 'calc';\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n accept(visitor) {\n if (this.args) {\n this.args = visitor.visitArray(this.args);\n }\n }\n\n //\n // When evaluating a function call,\n // we either find the function in the functionRegistry,\n // in which case we call it, passing the evaluated arguments,\n // if this returns null or we cannot find the function, we\n // simply print it out as it appeared originally [2].\n //\n // The reason why we evaluate the arguments, is in the case where\n // we try to pass a variable to a function, like: `saturate(@color)`.\n // The function should receive the value, not the variable.\n //\n eval(context) {\n /**\n * Turn off math for calc(), and switch back on for evaluating nested functions\n */\n const currentMathContext = context.mathOn;\n context.mathOn = !this.calc;\n if (this.calc || context.inCalc) {\n context.enterCalc();\n }\n const args = this.args.map(a => a.eval(context));\n if (this.calc || context.inCalc) {\n context.exitCalc();\n }\n context.mathOn = currentMathContext;\n\n let result;\n const funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo());\n\n if (funcCaller.isValid()) {\n try {\n result = funcCaller.call(args);\n } catch (e) {\n throw { \n type: e.type || 'Runtime',\n message: `error evaluating function \\`${this.name}\\`${e.message ? `: ${e.message}` : ''}`,\n index: this.getIndex(), \n filename: this.fileInfo().filename,\n line: e.lineNumber,\n column: e.columnNumber\n };\n }\n\n if (result !== null && result !== undefined) {\n // Results that that are not nodes are cast as Anonymous nodes\n // Falsy values or booleans are returned as empty nodes\n if (!(result instanceof Node)) {\n if (!result || result === true) {\n result = new Anonymous(null); \n }\n else {\n result = new Anonymous(result.toString()); \n }\n \n }\n result._index = this._index;\n result._fileInfo = this._fileInfo;\n return result;\n }\n\n }\n\n return new Call(this.name, args, this.getIndex(), this.fileInfo());\n }\n\n genCSS(context, output) {\n output.add(`${this.name}(`, this.fileInfo(), this.getIndex());\n\n for (let i = 0; i < this.args.length; i++) {\n this.args[i].genCSS(context, output);\n if (i + 1 < this.args.length) {\n output.add(', ');\n }\n }\n\n output.add(')');\n }\n}\n\nCall.prototype.type = 'Call';\nexport default Call;\n","import Node from './node';\nimport Call from './call';\n\nclass Variable extends Node {\n constructor(name, index, currentFileInfo) {\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let variable;\n let name = this.name;\n\n if (name.indexOf('@@') === 0) {\n name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`;\n }\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive variable definition for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n variable = this.find(context.frames, frame => {\n const v = frame.variable(name);\n if (v) {\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n // If in calc, wrap vars in a function call to cascade evaluate args first\n if (context.inCalc) {\n return (new Call('_SELF', [v.value])).eval(context);\n }\n else {\n return v.value.eval(context);\n }\n }\n });\n if (variable) {\n this.evaluating = false;\n return variable;\n } else {\n throw { type: 'Name',\n message: `variable ${name} is undefined`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nVariable.prototype.type = 'Variable';\nexport default Variable;\n","import Node from './node';\nimport Declaration from './declaration';\n\nclass Property extends Node {\n constructor(name, index, currentFileInfo) {\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let property;\n const name = this.name;\n // TODO: shorten this reference\n const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules;\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive property reference for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n property = this.find(context.frames, frame => {\n let v;\n const vArr = frame.property(name);\n if (vArr) {\n for (let i = 0; i < vArr.length; i++) {\n v = vArr[i];\n\n vArr[i] = new Declaration(v.name,\n v.value,\n v.important,\n v.merge,\n v.index,\n v.currentFileInfo,\n v.inline,\n v.variable\n );\n }\n mergeRules(vArr);\n\n v = vArr[vArr.length - 1];\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n v = v.value.eval(context);\n return v;\n }\n });\n if (property) {\n this.evaluating = false;\n return property;\n } else {\n throw { type: 'Name',\n message: `Property '${name}' is undefined`,\n filename: this.currentFileInfo.filename,\n index: this.index };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nProperty.prototype.type = 'Property';\nexport default Property;\n","import Node from './node';\n\nclass Attribute extends Node {\n constructor(key, op, value) {\n this.key = key;\n this.op = op;\n this.value = value;\n }\n\n eval(context) {\n return new Attribute(this.key.eval ? this.key.eval(context) : this.key,\n this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value);\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context) {\n let value = this.key.toCSS ? this.key.toCSS(context) : this.key;\n\n if (this.op) {\n value += this.op;\n value += (this.value.toCSS ? this.value.toCSS(context) : this.value);\n }\n\n return `[${value}]`;\n }\n}\n\nAttribute.prototype.type = 'Attribute';\nexport default Attribute;\n","import Node from './node';\nimport Variable from './variable';\nimport Property from './property';\n\nclass Quoted extends Node {\n constructor(str, content, escaped, index, currentFileInfo) {\n this.escaped = (escaped == null) ? true : escaped;\n this.value = content || '';\n this.quote = str.charAt(0);\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.variableRegex = /@\\{([\\w-]+)\\}/g;\n this.propRegex = /\\$\\{([\\w-]+)\\}/g;\n }\n\n genCSS(context, output) {\n if (!this.escaped) {\n output.add(this.quote, this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n if (!this.escaped) {\n output.add(this.quote);\n }\n }\n\n containsVariables() {\n return this.value.match(this.variableRegex);\n }\n\n eval(context) {\n const that = this;\n let value = this.value;\n const variableReplacement = (_, name) => {\n const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n const propertyReplacement = (_, name) => {\n const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n function iterativeReplace(value, regexp, replacementFnc) {\n let evaluatedValue = value;\n do {\n value = evaluatedValue.toString();\n evaluatedValue = value.replace(regexp, replacementFnc);\n } while (value !== evaluatedValue);\n return evaluatedValue;\n }\n value = iterativeReplace(value, this.variableRegex, variableReplacement);\n value = iterativeReplace(value, this.propRegex, propertyReplacement);\n return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo());\n }\n\n compare(other) {\n // when comparing quoted strings allow the quote to differ\n if (other.type === 'Quoted' && !this.escaped && !other.escaped) {\n return Node.numericCompare(this.value, other.value);\n } else {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n }\n}\n\nQuoted.prototype.type = 'Quoted';\nexport default Quoted;\n","import Node from './node';\n\nclass URL extends Node {\n constructor(val, index, currentFileInfo, isEvald) {\n this.value = val;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.isEvald = isEvald;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n genCSS(context, output) {\n output.add('url(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n const val = this.value.eval(context);\n let rootpath;\n\n if (!this.isEvald) {\n // Add the rootpath if the URL requires a rewrite\n rootpath = this.fileInfo() && this.fileInfo().rootpath;\n if (typeof rootpath === 'string' &&\n typeof val.value === 'string' &&\n context.pathRequiresRewrite(val.value)) {\n if (!val.quote) {\n rootpath = escapePath(rootpath);\n }\n val.value = context.rewritePath(val.value, rootpath);\n } else {\n val.value = context.normalizePath(val.value);\n }\n\n // Add url args if enabled\n if (context.urlArgs) {\n if (!val.value.match(/^\\s*data:/)) {\n const delimiter = val.value.indexOf('?') === -1 ? '?' : '&';\n const urlArgs = delimiter + context.urlArgs;\n if (val.value.indexOf('#') !== -1) {\n val.value = val.value.replace('#', `${urlArgs}#`);\n } else {\n val.value += urlArgs;\n }\n }\n }\n }\n\n return new URL(val, this.getIndex(), this.fileInfo(), true);\n }\n}\n\nURL.prototype.type = 'Url';\n\nfunction escapePath(path) {\n return path.replace(/[\\(\\)'\"\\s]/g, match => `\\\\${match}`);\n}\n\nexport default URL;\n","import Ruleset from './ruleset';\nimport Value from './value';\nimport Selector from './selector';\nimport Anonymous from './anonymous';\nimport Expression from './expression';\nimport AtRule from './atrule';\nimport * as utils from '../utils';\n\nclass Media extends AtRule {\n constructor(value, features, index, currentFileInfo, visibilityInfo) {\n this._index = index;\n this._fileInfo = currentFileInfo;\n\n const selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors();\n\n this.features = new Value(features);\n this.rules = [new Ruleset(selectors, value)];\n this.rules[0].allowImports = true;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n this.setParent(selectors, this);\n this.setParent(this.features, this);\n this.setParent(this.rules, this);\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n if (this.rules) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n genCSS(context, output) {\n output.add('@media ', this._fileInfo, this._index);\n this.features.genCSS(context, output);\n this.outputRuleset(context, output, this.rules);\n }\n\n eval(context) {\n if (!context.mediaBlocks) {\n context.mediaBlocks = [];\n context.mediaPath = [];\n }\n\n const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo());\n if (this.debugInfo) {\n this.rules[0].debugInfo = this.debugInfo;\n media.debugInfo = this.debugInfo;\n }\n \n media.features = this.features.eval(context);\n\n context.mediaPath.push(media);\n context.mediaBlocks.push(media);\n\n this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit();\n context.frames.unshift(this.rules[0]);\n media.rules = [this.rules[0].eval(context)];\n context.frames.shift();\n\n context.mediaPath.pop();\n\n return context.mediaPath.length === 0 ? media.evalTop(context) :\n media.evalNested(context);\n }\n\n evalTop(context) {\n let result = this;\n\n // Render all dependent Media blocks.\n if (context.mediaBlocks.length > 1) {\n const selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors();\n result = new Ruleset(selectors, context.mediaBlocks);\n result.multiMedia = true;\n result.copyVisibilityInfo(this.visibilityInfo());\n this.setParent(result, this);\n }\n\n delete context.mediaBlocks;\n delete context.mediaPath;\n\n return result;\n }\n\n evalNested(context) {\n let i;\n let value;\n const path = context.mediaPath.concat([this]);\n\n // Extract the media-query conditions separated with `,` (OR).\n for (i = 0; i < path.length; i++) {\n value = path[i].features instanceof Value ?\n path[i].features.value : path[i].features;\n path[i] = Array.isArray(value) ? value : [value];\n }\n\n // Trace all permutations to generate the resulting media-query.\n //\n // (a, b and c) with nested (d, e) ->\n // a and d\n // a and e\n // b and c and d\n // b and c and e\n this.features = new Value(this.permute(path).map(path => {\n path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment));\n\n for (i = path.length - 1; i > 0; i--) {\n path.splice(i, 0, new Anonymous('and'));\n }\n\n return new Expression(path);\n }));\n this.setParent(this.features, this);\n\n // Fake a tree-node that doesn't output anything.\n return new Ruleset([], []);\n }\n\n permute(arr) {\n if (arr.length === 0) {\n return [];\n } else if (arr.length === 1) {\n return arr[0];\n } else {\n const result = [];\n const rest = this.permute(arr.slice(1));\n for (let i = 0; i < rest.length; i++) {\n for (let j = 0; j < arr[0].length; j++) {\n result.push([arr[0][j]].concat(rest[i]));\n }\n }\n return result;\n }\n }\n\n bubbleSelectors(selectors) {\n if (!selectors) {\n return;\n }\n this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])];\n this.setParent(this.rules, this);\n }\n}\n\nMedia.prototype.type = 'Media';\nexport default Media;\n","import Node from './node';\nimport Media from './media';\nimport URL from './url';\nimport Quoted from './quoted';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\nimport * as utils from '../utils';\nimport LessError from '../less-error';\n\n//\n// CSS @import node\n//\n// The general strategy here is that we don't want to wait\n// for the parsing to be completed, before we start importing\n// the file. That's because in the context of a browser,\n// most of the time will be spent waiting for the server to respond.\n//\n// On creation, we push the import path to our import queue, though\n// `import,push`, we also pass it a callback, which it'll call once\n// the file has been fetched, and parsed.\n//\nclass Import extends Node {\n constructor(path, features, options, index, currentFileInfo, visibilityInfo) {\n this.options = options;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.path = path;\n this.features = features;\n this.allowRoot = true;\n\n if (this.options.less !== undefined || this.options.inline) {\n this.css = !this.options.less || this.options.inline;\n } else {\n const pathValue = this.getPath();\n if (pathValue && /[#\\.\\&\\?]css([\\?;].*)?$/.test(pathValue)) {\n this.css = true;\n }\n }\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.features, this);\n this.setParent(this.path, this);\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n this.path = visitor.visit(this.path);\n if (!this.options.isPlugin && !this.options.inline && this.root) {\n this.root = visitor.visit(this.root);\n }\n }\n\n genCSS(context, output) {\n if (this.css && this.path._fileInfo.reference === undefined) {\n output.add('@import ', this._fileInfo, this._index);\n this.path.genCSS(context, output);\n if (this.features) {\n output.add(' ');\n this.features.genCSS(context, output);\n }\n output.add(';');\n }\n }\n\n getPath() {\n return (this.path instanceof URL) ?\n this.path.value.value : this.path.value;\n }\n\n isVariableImport() {\n let path = this.path;\n if (path instanceof URL) {\n path = path.value;\n }\n if (path instanceof Quoted) {\n return path.containsVariables();\n }\n\n return true;\n }\n\n evalForImport(context) {\n let path = this.path;\n\n if (path instanceof URL) {\n path = path.value;\n }\n\n return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo());\n }\n\n evalPath(context) {\n const path = this.path.eval(context);\n const fileInfo = this._fileInfo;\n\n if (!(path instanceof URL)) {\n // Add the rootpath if the URL requires a rewrite\n const pathValue = path.value;\n if (fileInfo &&\n pathValue &&\n context.pathRequiresRewrite(pathValue)) {\n path.value = context.rewritePath(pathValue, fileInfo.rootpath);\n } else {\n path.value = context.normalizePath(path.value);\n }\n }\n\n return path;\n }\n\n eval(context) {\n const result = this.doEval(context);\n if (this.options.reference || this.blocksVisibility()) {\n if (result.length || result.length === 0) {\n result.forEach(node => {\n node.addVisibilityBlock();\n }\n );\n } else {\n result.addVisibilityBlock();\n }\n }\n return result;\n }\n\n doEval(context) {\n let ruleset;\n let registry;\n const features = this.features && this.features.eval(context);\n\n if (this.options.isPlugin) {\n if (this.root && this.root.eval) {\n try {\n this.root.eval(context);\n }\n catch (e) {\n e.message = 'Plugin error during evaluation';\n throw new LessError(e, this.root.imports, this.root.filename);\n }\n }\n registry = context.frames[0] && context.frames[0].functionRegistry;\n if ( registry && this.root && this.root.functions ) {\n registry.addMultiple( this.root.functions );\n }\n\n return [];\n }\n\n if (this.skip) {\n if (typeof this.skip === 'function') {\n this.skip = this.skip();\n }\n if (this.skip) {\n return [];\n }\n }\n if (this.options.inline) {\n const contents = new Anonymous(this.root, 0,\n {\n filename: this.importedFilename,\n reference: this.path._fileInfo && this.path._fileInfo.reference\n }, true, true);\n\n return this.features ? new Media([contents], this.features.value) : [contents];\n } else if (this.css) {\n const newImport = new Import(this.evalPath(context), features, this.options, this._index);\n if (!newImport.css && this.error) {\n throw this.error;\n }\n return newImport;\n } else {\n ruleset = new Ruleset(null, utils.copyArray(this.root.rules));\n ruleset.evalImports(context);\n\n return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules;\n }\n }\n}\n\nImport.prototype.type = 'Import';\nexport default Import;\n","import Node from './node';\nimport Variable from './variable';\n\nconst JsEvalNode = () => {\n};\nJsEvalNode.prototype = new Node();\n\nJsEvalNode.prototype.evaluateJavaScript = function (expression, context) {\n let result;\n const that = this;\n const evalContext = {};\n\n if (!context.javascriptEnabled) {\n throw { message: 'Inline JavaScript is not enabled. Is it set in your options?',\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n expression = expression.replace(/@\\{([\\w-]+)\\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context)));\n\n try {\n expression = new Function(`return (${expression})`);\n } catch (e) {\n throw { message: `JavaScript evaluation error: ${e.message} from \\`${expression}\\`` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n const variables = context.frames[0].variables();\n for (const k in variables) {\n if (variables.hasOwnProperty(k)) {\n /* jshint loopfunc:true */\n evalContext[k.slice(1)] = {\n value: variables[k].value,\n toJS: function () {\n return this.value.eval(context).toCSS();\n }\n };\n }\n }\n\n try {\n result = expression.call(evalContext);\n } catch (e) {\n throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/[\"]/g, '\\'')}'` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n return result;\n};\nJsEvalNode.prototype.jsify = obj => {\n if (Array.isArray(obj.value) && (obj.value.length > 1)) {\n return `[${obj.value.map(v => v.toCSS()).join(', ')}]`;\n } else {\n return obj.toCSS();\n }\n};\n\nexport default JsEvalNode;\n","import JsEvalNode from './js-eval-node';\nimport Dimension from './dimension';\nimport Quoted from './quoted';\nimport Anonymous from './anonymous';\n\nclass JavaScript extends JsEvalNode {\n constructor(string, escaped, index, currentFileInfo) {\n this.escaped = escaped;\n this.expression = string;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n const result = this.evaluateJavaScript(this.expression, context);\n const type = typeof result;\n\n if (type === 'number' && !isNaN(result)) {\n return new Dimension(result);\n } else if (type === 'string') {\n return new Quoted(`\"${result}\"`, result, this.escaped, this._index);\n } else if (Array.isArray(result)) {\n return new Anonymous(result.join(', '));\n } else {\n return new Anonymous(result);\n }\n }\n}\n\nJavaScript.prototype.type = 'JavaScript';\nexport default JavaScript;\n","import Node from './node';\n\nclass Assignment extends Node {\n constructor(key, val) {\n this.key = key;\n this.value = val;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval(context) {\n if (this.value.eval) {\n return new Assignment(this.key, this.value.eval(context));\n }\n return this;\n }\n\n genCSS(context, output) {\n output.add(`${this.key}=`);\n if (this.value.genCSS) {\n this.value.genCSS(context, output);\n } else {\n output.add(this.value);\n }\n }\n}\n\nAssignment.prototype.type = 'Assignment';\nexport default Assignment;\n","import Node from './node';\n\nclass Condition extends Node {\n constructor(op, l, r, i, negate) {\n this.op = op.trim();\n this.lvalue = l;\n this.rvalue = r;\n this._index = i;\n this.negate = negate;\n }\n\n accept(visitor) {\n this.lvalue = visitor.visit(this.lvalue);\n this.rvalue = visitor.visit(this.rvalue);\n }\n\n eval(context) {\n const result = ((op, a, b) => {\n switch (op) {\n case 'and': return a && b;\n case 'or': return a || b;\n default:\n switch (Node.compare(a, b)) {\n case -1:\n return op === '<' || op === '=<' || op === '<=';\n case 0:\n return op === '=' || op === '>=' || op === '=<' || op === '<=';\n case 1:\n return op === '>' || op === '>=';\n default:\n return false;\n }\n }\n })(this.op, this.lvalue.eval(context), this.rvalue.eval(context));\n\n return this.negate ? !result : result;\n }\n}\n\nCondition.prototype.type = 'Condition';\nexport default Condition;\n","import Node from './node';\n\nclass UnicodeDescriptor extends Node {\n constructor(value) {\n this.value = value;\n }\n}\n\nUnicodeDescriptor.prototype.type = 'UnicodeDescriptor';\n\nexport default UnicodeDescriptor;\n","import Node from './node';\nimport Operation from './operation';\nimport Dimension from './dimension';\n\nclass Negative extends Node {\n constructor(node) {\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('-');\n this.value.genCSS(context, output);\n }\n\n eval(context) {\n if (context.isMathOn()) {\n return (new Operation('*', [new Dimension(-1), this.value])).eval(context);\n }\n return new Negative(this.value.eval(context));\n }\n}\n\nNegative.prototype.type = 'Negative';\nexport default Negative;\n","import Node from './node';\nimport Selector from './selector';\n\nclass Extend extends Node {\n constructor(selector, option, index, currentFileInfo, visibilityInfo) {\n this.selector = selector;\n this.option = option;\n this.object_id = Extend.next_id++;\n this.parent_ids = [this.object_id];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n switch (option) {\n case 'all':\n this.allowBefore = true;\n this.allowAfter = true;\n break;\n default:\n this.allowBefore = false;\n this.allowAfter = false;\n break;\n }\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n this.selector = visitor.visit(this.selector);\n }\n\n eval(context) {\n return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n clone(context) {\n return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n // it concatenates (joins) all selectors in selector array\n findSelfSelectors(selectors) {\n let selfElements = [];\n let i;\n let selectorElements;\n\n for (i = 0; i < selectors.length; i++) {\n selectorElements = selectors[i].elements;\n // duplicate the logic in genCSS function inside the selector node.\n // future TODO - move both logics into the selector joiner visitor\n if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') {\n selectorElements[0].combinator.value = ' ';\n }\n selfElements = selfElements.concat(selectors[i].elements);\n }\n\n this.selfSelectors = [new Selector(selfElements)];\n this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo());\n }\n}\n\nExtend.next_id = 0;\n\nExtend.prototype.type = 'Extend';\nexport default Extend;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport DetachedRuleset from './detached-ruleset';\nimport LessError from '../less-error';\n\nclass VariableCall extends Node {\n constructor(variable, index, currentFileInfo) {\n this.variable = variable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n eval(context) {\n let rules;\n let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context);\n const error = new LessError({message: `Could not evaluate variable call ${this.variable}`});\n\n if (!detachedRuleset.ruleset) {\n if (detachedRuleset.rules) {\n rules = detachedRuleset;\n }\n else if (Array.isArray(detachedRuleset)) {\n rules = new Ruleset('', detachedRuleset);\n }\n else if (Array.isArray(detachedRuleset.value)) {\n rules = new Ruleset('', detachedRuleset.value);\n }\n else {\n throw error;\n }\n detachedRuleset = new DetachedRuleset(rules);\n }\n if (detachedRuleset.ruleset) {\n return detachedRuleset.callEval(context);\n }\n throw error;\n }\n}\n\nVariableCall.prototype.type = 'VariableCall';\nexport default VariableCall;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport Selector from './selector';\n\nclass NamespaceValue extends Node {\n constructor(ruleCall, lookups, important, index, fileInfo) {\n this.value = ruleCall;\n this.lookups = lookups;\n this.important = important;\n this._index = index;\n this._fileInfo = fileInfo;\n }\n\n eval(context) {\n let i;\n let j;\n let name;\n let rules = this.value.eval(context);\n\n for (i = 0; i < this.lookups.length; i++) {\n name = this.lookups[i];\n\n /**\n * Eval'd DRs return rulesets.\n * Eval'd mixins return rules, so let's make a ruleset if we need it.\n * We need to do this because of late parsing of values\n */\n if (Array.isArray(rules)) {\n rules = new Ruleset([new Selector()], rules);\n }\n\n if (name === '') {\n rules = rules.lastDeclaration();\n }\n else if (name.charAt(0) === '@') {\n if (name.charAt(1) === '@') {\n name = `@${new Variable(name.substr(1)).eval(context).value}`;\n }\n if (rules.variables) {\n rules = rules.variable(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `variable ${name} not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n else {\n if (name.substring(0, 2) === '$@') {\n name = `$${new Variable(name.substr(1)).eval(context).value}`;\n }\n else {\n name = name.charAt(0) === '$' ? name : `$${name}`;\n }\n if (rules.properties) {\n rules = rules.property(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `property \"${name.substr(1)}\" not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n // Properties are an array of values, since a ruleset can have multiple props.\n // We pick the last one (the \"cascaded\" value)\n rules = rules[rules.length - 1];\n }\n\n if (rules.value) {\n rules = rules.eval(context).value;\n }\n if (rules.ruleset) {\n rules = rules.ruleset.eval(context);\n }\n }\n return rules;\n }\n}\n\nNamespaceValue.prototype.type = 'NamespaceValue';\nexport default NamespaceValue;\n","import Selector from './selector';\nimport Element from './element';\nimport Ruleset from './ruleset';\nimport Declaration from './declaration';\nimport DetachedRuleset from './detached-ruleset';\nimport Expression from './expression';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass Definition extends Ruleset {\n constructor(name, params, rules, condition, variadic, frames, visibilityInfo) {\n this.name = name || 'anonymous mixin';\n this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])];\n this.params = params;\n this.condition = condition;\n this.variadic = variadic;\n this.arity = params.length;\n this.rules = rules;\n this._lookups = {};\n const optionalParameters = [];\n this.required = params.reduce((count, p) => {\n if (!p.name || (p.name && !p.value)) {\n return count + 1;\n }\n else {\n optionalParameters.push(p.name);\n return count;\n }\n }, 0);\n this.optionalParameters = optionalParameters;\n this.frames = frames;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n if (this.params && this.params.length) {\n this.params = visitor.visitArray(this.params);\n }\n this.rules = visitor.visitArray(this.rules);\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n evalParams(context, mixinEnv, args, evaldArguments) {\n /* jshint boss:true */\n const frame = new Ruleset(null, null);\n\n let varargs;\n let arg;\n const params = utils.copyArray(this.params);\n let i;\n let j;\n let val;\n let name;\n let isNamedFound;\n let argIndex;\n let argsLength = 0;\n\n if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) {\n frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit();\n }\n mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames));\n\n if (args) {\n args = utils.copyArray(args);\n argsLength = args.length;\n\n for (i = 0; i < argsLength; i++) {\n arg = args[i];\n if (name = (arg && arg.name)) {\n isNamedFound = false;\n for (j = 0; j < params.length; j++) {\n if (!evaldArguments[j] && name === params[j].name) {\n evaldArguments[j] = arg.value.eval(context);\n frame.prependRule(new Declaration(name, arg.value.eval(context)));\n isNamedFound = true;\n break;\n }\n }\n if (isNamedFound) {\n args.splice(i, 1);\n i--;\n continue;\n } else {\n throw { type: 'Runtime', message: `Named argument for ${this.name} ${args[i].name} not found` };\n }\n }\n }\n }\n argIndex = 0;\n for (i = 0; i < params.length; i++) {\n if (evaldArguments[i]) { continue; }\n\n arg = args && args[argIndex];\n\n if (name = params[i].name) {\n if (params[i].variadic) {\n varargs = [];\n for (j = argIndex; j < argsLength; j++) {\n varargs.push(args[j].value.eval(context));\n }\n frame.prependRule(new Declaration(name, new Expression(varargs).eval(context)));\n } else {\n val = arg && arg.value;\n if (val) {\n // This was a mixin call, pass in a detached ruleset of it's eval'd rules\n if (Array.isArray(val)) {\n val = new DetachedRuleset(new Ruleset('', val));\n }\n else {\n val = val.eval(context);\n }\n } else if (params[i].value) {\n val = params[i].value.eval(mixinEnv);\n frame.resetCache();\n } else {\n throw { type: 'Runtime', message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` };\n }\n\n frame.prependRule(new Declaration(name, val));\n evaldArguments[i] = val;\n }\n }\n\n if (params[i].variadic && args) {\n for (j = argIndex; j < argsLength; j++) {\n evaldArguments[j] = args[j].value.eval(context);\n }\n }\n argIndex++;\n }\n\n return frame;\n }\n\n makeImportant() {\n const rules = !this.rules ? this.rules : this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant(true);\n } else {\n return r;\n }\n });\n const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames);\n return result;\n }\n\n eval(context) {\n return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames));\n }\n\n evalCall(context, args, important) {\n const _arguments = [];\n const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames;\n const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments);\n let rules;\n let ruleset;\n\n frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context)));\n\n rules = utils.copyArray(this.rules);\n\n ruleset = new Ruleset(null, rules);\n ruleset.originalRuleset = this;\n ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames)));\n if (important) {\n ruleset = ruleset.makeImportant();\n }\n return ruleset;\n }\n\n matchCondition(args, context) {\n if (this.condition && !this.condition.eval(\n new contexts.Eval(context,\n [this.evalParams(context, /* the parameter variables */\n new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])]\n .concat(this.frames || []) // the parent namespace/mixin frames\n .concat(context.frames)))) { // the current environment frames\n return false;\n }\n return true;\n }\n\n matchArgs(args, context) {\n const allArgsCnt = (args && args.length) || 0;\n let len;\n const optionalParameters = this.optionalParameters;\n const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => {\n if (optionalParameters.indexOf(p.name) < 0) {\n return count + 1;\n } else {\n return count;\n }\n }, 0);\n\n if (!this.variadic) {\n if (requiredArgsCnt < this.required) {\n return false;\n }\n if (allArgsCnt > this.params.length) {\n return false;\n }\n } else {\n if (requiredArgsCnt < (this.required - 1)) {\n return false;\n }\n }\n\n // check patterns\n len = Math.min(requiredArgsCnt, this.arity);\n\n for (let i = 0; i < len; i++) {\n if (!this.params[i].name && !this.params[i].variadic) {\n if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) {\n return false;\n }\n }\n }\n return true;\n }\n}\n\nDefinition.prototype.type = 'MixinDefinition';\nDefinition.prototype.evalFirst = true;\nexport default Definition;\n","import Node from './node';\nimport Selector from './selector';\nimport MixinDefinition from './mixin-definition';\nimport defaultFunc from '../functions/default';\n\nclass MixinCall extends Node {\n constructor(elements, args, index, currentFileInfo, important) {\n this.selector = new Selector(elements);\n this.arguments = args || [];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.important = important;\n this.allowRoot = true;\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n if (this.selector) {\n this.selector = visitor.visit(this.selector);\n }\n if (this.arguments.length) {\n this.arguments = visitor.visitArray(this.arguments);\n }\n }\n\n eval(context) {\n let mixins;\n let mixin;\n let mixinPath;\n const args = [];\n let arg;\n let argValue;\n const rules = [];\n let match = false;\n let i;\n let m;\n let f;\n let isRecursive;\n let isOneFound;\n const candidates = [];\n let candidate;\n const conditionResult = [];\n let defaultResult;\n const defFalseEitherCase = -1;\n const defNone = 0;\n const defTrue = 1;\n const defFalse = 2;\n let count;\n let originalRuleset;\n let noArgumentsFilter;\n\n this.selector = this.selector.eval(context);\n\n function calcDefGroup(mixin, mixinPath) {\n let f;\n let p;\n let namespace;\n\n for (f = 0; f < 2; f++) {\n conditionResult[f] = true;\n defaultFunc.value(f);\n for (p = 0; p < mixinPath.length && conditionResult[f]; p++) {\n namespace = mixinPath[p];\n if (namespace.matchCondition) {\n conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context);\n }\n }\n if (mixin.matchCondition) {\n conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context);\n }\n }\n if (conditionResult[0] || conditionResult[1]) {\n if (conditionResult[0] != conditionResult[1]) {\n return conditionResult[1] ?\n defTrue : defFalse;\n }\n\n return defNone;\n }\n return defFalseEitherCase;\n }\n\n for (i = 0; i < this.arguments.length; i++) {\n arg = this.arguments[i];\n argValue = arg.value.eval(context);\n if (arg.expand && Array.isArray(argValue.value)) {\n argValue = argValue.value;\n for (m = 0; m < argValue.length; m++) {\n args.push({value: argValue[m]});\n }\n } else {\n args.push({name: arg.name, value: argValue});\n }\n }\n\n noArgumentsFilter = rule => rule.matchArgs(null, context);\n\n for (i = 0; i < context.frames.length; i++) {\n if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) {\n isOneFound = true;\n\n // To make `default()` function independent of definition order we have two \"subpasses\" here.\n // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`),\n // and build candidate list with corresponding flags. Then, when we know all possible matches,\n // we make a final decision.\n\n for (m = 0; m < mixins.length; m++) {\n mixin = mixins[m].rule;\n mixinPath = mixins[m].path;\n isRecursive = false;\n for (f = 0; f < context.frames.length; f++) {\n if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) {\n isRecursive = true;\n break;\n }\n }\n if (isRecursive) {\n continue;\n }\n\n if (mixin.matchArgs(args, context)) {\n candidate = {mixin, group: calcDefGroup(mixin, mixinPath)};\n\n if (candidate.group !== defFalseEitherCase) {\n candidates.push(candidate);\n }\n\n match = true;\n }\n }\n\n defaultFunc.reset();\n\n count = [0, 0, 0];\n for (m = 0; m < candidates.length; m++) {\n count[candidates[m].group]++;\n }\n\n if (count[defNone] > 0) {\n defaultResult = defFalse;\n } else {\n defaultResult = defTrue;\n if ((count[defTrue] + count[defFalse]) > 1) {\n throw { type: 'Runtime',\n message: `Ambiguous use of \\`default()\\` found when matching for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n for (m = 0; m < candidates.length; m++) {\n candidate = candidates[m].group;\n if ((candidate === defNone) || (candidate === defaultResult)) {\n try {\n mixin = candidates[m].mixin;\n if (!(mixin instanceof MixinDefinition)) {\n originalRuleset = mixin.originalRuleset || mixin;\n mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo());\n mixin.originalRuleset = originalRuleset;\n }\n const newRules = mixin.evalCall(context, args, this.important).rules;\n this._setVisibilityToReplacement(newRules);\n Array.prototype.push.apply(rules, newRules);\n } catch (e) {\n throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack };\n }\n }\n }\n\n if (match) {\n return rules;\n }\n }\n }\n if (isOneFound) {\n throw { type: 'Runtime',\n message: `No matching definition was found for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n } else {\n throw { type: 'Name',\n message: `${this.selector.toCSS().trim()} is undefined`,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n _setVisibilityToReplacement(replacement) {\n let i;\n let rule;\n if (this.blocksVisibility()) {\n for (i = 0; i < replacement.length; i++) {\n rule = replacement[i];\n rule.addVisibilityBlock();\n }\n }\n }\n\n format(args) {\n return `${this.selector.toCSS().trim()}(${args ? args.map(a => {\n let argValue = '';\n if (a.name) {\n argValue += `${a.name}:`;\n }\n if (a.value.toCSS) {\n argValue += a.value.toCSS();\n } else {\n argValue += '???';\n }\n return argValue;\n }).join(', ') : ''})`;\n }\n}\n\nMixinCall.prototype.type = 'MixinCall';\nexport default MixinCall;\n","const tree = Object.create(null);\n\nimport Node from './node';\nimport Color from './color';\nimport AtRule from './atrule';\nimport DetachedRuleset from './detached-ruleset';\nimport Operation from './operation';\nimport Dimension from './dimension';\nimport Unit from './unit';\nimport Keyword from './keyword';\nimport Variable from './variable';\nimport Property from './property';\nimport Ruleset from './ruleset';\nimport Element from './element';\nimport Attribute from './attribute';\nimport Combinator from './combinator';\nimport Selector from './selector';\nimport Quoted from './quoted';\nimport Expression from './expression';\nimport Declaration from './declaration';\nimport Call from './call';\nimport URL from './url';\nimport Import from './import';\nimport Comment from './comment';\nimport Anonymous from './anonymous';\nimport Value from './value';\nimport JavaScript from './javascript';\nimport Assignment from './assignment';\nimport Condition from './condition';\nimport Paren from './paren';\nimport Media from './media';\nimport UnicodeDescriptor from './unicode-descriptor';\nimport Negative from './negative';\nimport Extend from './extend';\nimport VariableCall from './variable-call';\nimport NamespaceValue from './namespace-value';\n\n// mixins\nimport MixinCall from './mixin-call';\nimport MixinDefinition from './mixin-definition';\n\nexport default {\n Node, Color, AtRule, DetachedRuleset, Operation,\n Dimension, Unit, Keyword, Variable, Property,\n Ruleset, Element, Attribute, Combinator, Selector,\n Quoted, Expression, Declaration, Call, URL, Import,\n Comment, Anonymous, Value, JavaScript, Assignment,\n Condition, Paren, Media, UnicodeDescriptor, Negative,\n Extend, VariableCall, NamespaceValue,\n mixin: {\n Call: MixinCall,\n Definition: MixinDefinition\n }\n};","export default {\n error: function(msg) {\n this._fireEvent('error', msg);\n },\n warn: function(msg) {\n this._fireEvent('warn', msg);\n },\n info: function(msg) {\n this._fireEvent('info', msg);\n },\n debug: function(msg) {\n this._fireEvent('debug', msg);\n },\n addListener: function(listener) {\n this._listeners.push(listener);\n },\n removeListener: function(listener) {\n for (let i = 0; i < this._listeners.length; i++) {\n if (this._listeners[i] === listener) {\n this._listeners.splice(i, 1);\n return;\n }\n }\n },\n _fireEvent: function(type, msg) {\n for (let i = 0; i < this._listeners.length; i++) {\n const logFunction = this._listeners[i][type];\n if (logFunction) {\n logFunction(msg);\n }\n }\n },\n _listeners: []\n};\n","/**\n * @todo Document why this abstraction exists, and the relationship between\n * environment, file managers, and plugin manager\n */\n\nimport logger from '../logger';\n\nclass environment {\n constructor(externalEnvironment, fileManagers) {\n this.fileManagers = fileManagers || [];\n externalEnvironment = externalEnvironment || {};\n\n const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator'];\n const requiredFunctions = [];\n const functions = requiredFunctions.concat(optionalFunctions);\n\n for (let i = 0; i < functions.length; i++) {\n const propName = functions[i];\n const environmentFunc = externalEnvironment[propName];\n if (environmentFunc) {\n this[propName] = environmentFunc.bind(externalEnvironment);\n } else if (i < requiredFunctions.length) {\n this.warn(`missing required function in environment - ${propName}`);\n }\n }\n }\n\n getFileManager(filename, currentDirectory, options, environment, isSync) {\n\n if (!filename) {\n logger.warn('getFileManager called with no filename.. Please report this issue. continuing.');\n }\n if (currentDirectory == null) {\n logger.warn('getFileManager called with null directory.. Please report this issue. continuing.');\n }\n\n let fileManagers = this.fileManagers;\n if (options.pluginManager) {\n fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers());\n }\n for (let i = fileManagers.length - 1; i >= 0 ; i--) {\n const fileManager = fileManagers[i];\n if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) {\n return fileManager;\n }\n }\n return null;\n }\n\n addFileManager(fileManager) {\n this.fileManagers.push(fileManager);\n }\n\n clearFileManagers() {\n this.fileManagers = [];\n }\n}\n\nexport default environment;\n","const abstractFileManager = () => {\n};\n\nabstractFileManager.prototype.getPath = filename => {\n let j = filename.lastIndexOf('?');\n if (j > 0) {\n filename = filename.slice(0, j);\n }\n j = filename.lastIndexOf('/');\n if (j < 0) {\n j = filename.lastIndexOf('\\\\');\n }\n if (j < 0) {\n return '';\n }\n return filename.slice(0, j + 1);\n};\n\nabstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\\.[a-z]*$)|([\\?;].*)$/.test(path) ? path : path + ext;\n\nabstractFileManager.prototype.tryAppendLessExtension = function(path) {\n return this.tryAppendExtension(path, '.less');\n};\n\nabstractFileManager.prototype.supportsSync = () => false;\n\nabstractFileManager.prototype.alwaysMakePathsAbsolute = () => false;\n\nabstractFileManager.prototype.isPathAbsolute = filename => (/^(?:[a-z-]+:|\\/|\\\\|#)/i).test(filename);\n// TODO: pull out / replace?\nabstractFileManager.prototype.join = (basePath, laterPath) => {\n if (!basePath) {\n return laterPath;\n }\n return basePath + laterPath;\n};\n\nabstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) {\n // diff between two paths to create a relative path\n\n const urlParts = this.extractUrlParts(url);\n\n const baseUrlParts = this.extractUrlParts(baseUrl);\n let i;\n let max;\n let urlDirectories;\n let baseUrlDirectories;\n let diff = '';\n if (urlParts.hostPart !== baseUrlParts.hostPart) {\n return '';\n }\n max = Math.max(baseUrlParts.directories.length, urlParts.directories.length);\n for (i = 0; i < max; i++) {\n if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; }\n }\n baseUrlDirectories = baseUrlParts.directories.slice(i);\n urlDirectories = urlParts.directories.slice(i);\n for (i = 0; i < baseUrlDirectories.length - 1; i++) {\n diff += '../';\n }\n for (i = 0; i < urlDirectories.length - 1; i++) {\n diff += `${urlDirectories[i]}/`;\n }\n return diff;\n};\n// helper function, not part of API\nabstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) {\n // urlParts[1] = protocol://hostname/ OR /\n // urlParts[2] = / if path relative to host base\n // urlParts[3] = directories\n // urlParts[4] = filename\n // urlParts[5] = parameters\n\n const urlPartsRegex = /^((?:[a-z-]+:)?\\/{2}(?:[^\\/\\?#]*\\/)|([\\/\\\\]))?((?:[^\\/\\\\\\?#]*[\\/\\\\])*)([^\\/\\\\\\?#]*)([#\\?].*)?$/i;\n\n const urlParts = url.match(urlPartsRegex);\n const returner = {};\n let rawDirectories = [];\n const directories = [];\n let i;\n let baseUrlParts;\n\n if (!urlParts) {\n throw new Error(`Could not parse sheet href - '${url}'`);\n }\n\n // Stylesheets in IE don't always return the full path\n if (baseUrl && (!urlParts[1] || urlParts[2])) {\n baseUrlParts = baseUrl.match(urlPartsRegex);\n if (!baseUrlParts) {\n throw new Error(`Could not parse page url - '${baseUrl}'`);\n }\n urlParts[1] = urlParts[1] || baseUrlParts[1] || '';\n if (!urlParts[2]) {\n urlParts[3] = baseUrlParts[3] + urlParts[3];\n }\n }\n\n if (urlParts[3]) {\n rawDirectories = urlParts[3].replace(/\\\\/g, '/').split('/');\n\n // collapse '..' and skip '.'\n for (i = 0; i < rawDirectories.length; i++) {\n\n if (rawDirectories[i] === '..') {\n directories.pop();\n }\n else if (rawDirectories[i] !== '.') {\n directories.push(rawDirectories[i]);\n }\n \n }\n }\n\n returner.hostPart = urlParts[1];\n returner.directories = directories;\n returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/');\n returner.path = (urlParts[1] || '') + directories.join('/');\n returner.filename = urlParts[4];\n returner.fileUrl = returner.path + (urlParts[4] || '');\n returner.url = returner.fileUrl + (urlParts[5] || '');\n return returner;\n};\n\nexport default abstractFileManager;\n","import functionRegistry from '../functions/function-registry';\nimport LessError from '../less-error';\n\nclass AbstractPluginLoader {\n constructor() {\n // Implemented by Node.js plugin loader\n this.require = () => null\n }\n\n evalPlugin(contents, context, imports, pluginOptions, fileInfo) {\n let loader;\n let registry;\n let pluginObj;\n let localModule;\n let pluginManager;\n let filename;\n let result;\n\n pluginManager = context.pluginManager;\n\n if (fileInfo) {\n if (typeof fileInfo === 'string') {\n filename = fileInfo;\n }\n else {\n filename = fileInfo.filename;\n }\n }\n const shortname = (new this.less.FileManager()).extractUrlParts(filename).filename;\n\n if (filename) {\n pluginObj = pluginManager.get(filename);\n\n if (pluginObj) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n return pluginObj;\n }\n }\n localModule = {\n exports: {},\n pluginManager,\n fileInfo\n };\n registry = functionRegistry.create();\n\n const registerPlugin = obj => {\n pluginObj = obj;\n };\n\n try {\n loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents);\n loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo);\n }\n catch (e) {\n return new LessError(e, imports, filename);\n }\n\n if (!pluginObj) {\n pluginObj = localModule.exports;\n }\n pluginObj = this.validatePlugin(pluginObj, filename, shortname);\n\n if (pluginObj instanceof LessError) {\n return pluginObj;\n }\n\n if (pluginObj) {\n pluginObj.imports = imports;\n pluginObj.filename = filename;\n\n // For < 3.x (or unspecified minVersion) - setOptions() before install()\n if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n\n if (result) {\n return result;\n }\n }\n\n // Run on first load\n pluginManager.addPlugin(pluginObj, fileInfo.filename, registry);\n pluginObj.functions = registry.getLocalFunctions();\n\n // Need to call setOptions again because the pluginObj might have functions\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n\n // Run every @plugin call\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n\n }\n else {\n return new LessError({ message: 'Not a valid plugin' }, imports, filename);\n }\n\n return pluginObj;\n }\n\n trySetOptions(plugin, filename, name, options) {\n if (options && !plugin.setOptions) {\n return new LessError({\n message: `Options have been provided but the plugin ${name} does not support any options.`\n });\n }\n try {\n plugin.setOptions && plugin.setOptions(options);\n }\n catch (e) {\n return new LessError(e);\n }\n }\n\n validatePlugin(plugin, filename, name) {\n if (plugin) {\n // support plugins being a function\n // so that the plugin can be more usable programmatically\n if (typeof plugin === 'function') {\n plugin = new plugin();\n }\n\n if (plugin.minVersion) {\n if (this.compareVersion(plugin.minVersion, this.less.version) < 0) {\n return new LessError({\n message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}`\n });\n }\n }\n return plugin;\n }\n return null;\n }\n\n compareVersion(aVersion, bVersion) {\n if (typeof aVersion === 'string') {\n aVersion = aVersion.match(/^(\\d+)\\.?(\\d+)?\\.?(\\d+)?/);\n aVersion.shift();\n }\n for (let i = 0; i < aVersion.length; i++) {\n if (aVersion[i] !== bVersion[i]) {\n return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1;\n }\n }\n return 0;\n }\n\n versionToString(version) {\n let versionString = '';\n for (let i = 0; i < version.length; i++) {\n versionString += (versionString ? '.' : '') + version[i];\n }\n return versionString;\n }\n\n printUsage(plugins) {\n for (let i = 0; i < plugins.length; i++) {\n const plugin = plugins[i];\n if (plugin.printUsage) {\n plugin.printUsage();\n }\n }\n }\n}\n\nexport default AbstractPluginLoader;\n\n","import tree from '../tree';\nconst _visitArgs = { visitDeeper: true };\nlet _hasIndexed = false;\n\nfunction _noop(node) {\n return node;\n}\n\nfunction indexNodeTypes(parent, ticker) {\n // add .typeIndex to tree node types for lookup table\n let key;\n\n let child;\n for (key in parent) { \n /* eslint guard-for-in: 0 */\n child = parent[key];\n switch (typeof child) {\n case 'function':\n // ignore bound functions directly on tree which do not have a prototype\n // or aren't nodes\n if (child.prototype && child.prototype.type) {\n child.prototype.typeIndex = ticker++;\n }\n break;\n case 'object':\n ticker = indexNodeTypes(child, ticker);\n break;\n \n }\n }\n return ticker;\n}\n\nclass Visitor {\n constructor(implementation) {\n this._implementation = implementation;\n this._visitInCache = {};\n this._visitOutCache = {};\n\n if (!_hasIndexed) {\n indexNodeTypes(tree, 1);\n _hasIndexed = true;\n }\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n\n const nodeTypeIndex = node.typeIndex;\n if (!nodeTypeIndex) {\n // MixinCall args aren't a node type?\n if (node.value && node.value.typeIndex) {\n this.visit(node.value);\n }\n return node;\n }\n\n const impl = this._implementation;\n let func = this._visitInCache[nodeTypeIndex];\n let funcOut = this._visitOutCache[nodeTypeIndex];\n const visitArgs = _visitArgs;\n let fnName;\n\n visitArgs.visitDeeper = true;\n\n if (!func) {\n fnName = `visit${node.type}`;\n func = impl[fnName] || _noop;\n funcOut = impl[`${fnName}Out`] || _noop;\n this._visitInCache[nodeTypeIndex] = func;\n this._visitOutCache[nodeTypeIndex] = funcOut;\n }\n\n if (func !== _noop) {\n const newNode = func.call(impl, node, visitArgs);\n if (node && impl.isReplacing) {\n node = newNode;\n }\n }\n\n if (visitArgs.visitDeeper && node && node.accept) {\n node.accept(this);\n }\n\n if (funcOut != _noop) {\n funcOut.call(impl, node);\n }\n\n return node;\n }\n\n visitArray(nodes, nonReplacing) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n\n // Non-replacing\n if (nonReplacing || !this._implementation.isReplacing) {\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n // Replacing\n const out = [];\n for (i = 0; i < cnt; i++) {\n const evald = this.visit(nodes[i]);\n if (evald === undefined) { continue; }\n if (!evald.splice) {\n out.push(evald);\n } else if (evald.length) {\n this.flatten(evald, out);\n }\n }\n return out;\n }\n\n flatten(arr, out) {\n if (!out) {\n out = [];\n }\n\n let cnt;\n let i;\n let item;\n let nestedCnt;\n let j;\n let nestedItem;\n\n for (i = 0, cnt = arr.length; i < cnt; i++) {\n item = arr[i];\n if (item === undefined) {\n continue;\n }\n if (!item.splice) {\n out.push(item);\n continue;\n }\n\n for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) {\n nestedItem = item[j];\n if (nestedItem === undefined) {\n continue;\n }\n if (!nestedItem.splice) {\n out.push(nestedItem);\n } else if (nestedItem.length) {\n this.flatten(nestedItem, out);\n }\n }\n }\n\n return out;\n }\n}\n\nexport default Visitor;\n","class ImportSequencer {\n constructor(onSequencerEmpty) {\n this.imports = [];\n this.variableImports = [];\n this._onSequencerEmpty = onSequencerEmpty;\n this._currentDepth = 0;\n }\n\n addImport(callback) {\n const importSequencer = this;\n\n const importItem = {\n callback,\n args: null,\n isReady: false\n };\n\n this.imports.push(importItem);\n return function(...args) {\n importItem.args = Array.prototype.slice.call(args, 0);\n importItem.isReady = true;\n importSequencer.tryRun();\n };\n }\n\n addVariableImport(callback) {\n this.variableImports.push(callback);\n }\n\n tryRun() {\n this._currentDepth++;\n try {\n while (true) {\n while (this.imports.length > 0) {\n const importItem = this.imports[0];\n if (!importItem.isReady) {\n return;\n }\n this.imports = this.imports.slice(1);\n importItem.callback.apply(null, importItem.args);\n }\n if (this.variableImports.length === 0) {\n break;\n }\n const variableImport = this.variableImports[0];\n this.variableImports = this.variableImports.slice(1);\n variableImport();\n }\n } finally {\n this._currentDepth--;\n }\n if (this._currentDepth === 0 && this._onSequencerEmpty) {\n this._onSequencerEmpty();\n }\n }\n}\n\nexport default ImportSequencer;\n","import contexts from '../contexts';\nimport Visitor from './visitor';\nimport ImportSequencer from './import-sequencer';\nimport * as utils from '../utils';\n\nconst ImportVisitor = function(importer, finish) {\n\n this._visitor = new Visitor(this);\n this._importer = importer;\n this._finish = finish;\n this.context = new contexts.Eval();\n this.importCount = 0;\n this.onceFileDetectionMap = {};\n this.recursionDetector = {};\n this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this));\n};\n\nImportVisitor.prototype = {\n isReplacing: false,\n run: function (root) {\n try {\n // process the contents\n this._visitor.visit(root);\n }\n catch (e) {\n this.error = e;\n }\n\n this.isFinished = true;\n this._sequencer.tryRun();\n },\n _onSequencerEmpty: function() {\n if (!this.isFinished) {\n return;\n }\n this._finish(this.error);\n },\n visitImport: function (importNode, visitArgs) {\n const inlineCSS = importNode.options.inline;\n\n if (!importNode.css || inlineCSS) {\n\n const context = new contexts.Eval(this.context, utils.copyArray(this.context.frames));\n const importParent = context.frames[0];\n\n this.importCount++;\n if (importNode.isVariableImport()) {\n this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent));\n } else {\n this.processImportNode(importNode, context, importParent);\n }\n }\n visitArgs.visitDeeper = false;\n },\n processImportNode: function(importNode, context, importParent) {\n let evaldImportNode;\n const inlineCSS = importNode.options.inline;\n\n try {\n evaldImportNode = importNode.evalForImport(context);\n } catch (e) {\n if (!e.filename) { e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename; }\n // attempt to eval properly and treat as css\n importNode.css = true;\n // if that fails, this error will be thrown\n importNode.error = e;\n }\n\n if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) {\n if (evaldImportNode.options.multiple) {\n context.importMultiple = true;\n }\n\n // try appending if we haven't determined if it is css or not\n const tryAppendLessExtension = evaldImportNode.css === undefined;\n\n for (let i = 0; i < importParent.rules.length; i++) {\n if (importParent.rules[i] === importNode) {\n importParent.rules[i] = evaldImportNode;\n break;\n }\n }\n\n const onImported = this.onImported.bind(this, evaldImportNode, context);\n const sequencedOnImported = this._sequencer.addImport(onImported);\n\n this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(),\n evaldImportNode.options, sequencedOnImported);\n } else {\n this.importCount--;\n if (this.isFinished) {\n this._sequencer.tryRun();\n }\n }\n },\n onImported: function (importNode, context, e, root, importedAtRoot, fullPath) {\n if (e) {\n if (!e.filename) {\n e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename;\n }\n this.error = e;\n }\n\n const importVisitor = this;\n const inlineCSS = importNode.options.inline;\n const isPlugin = importNode.options.isPlugin;\n const isOptional = importNode.options.optional;\n const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector;\n\n if (!context.importMultiple) {\n if (duplicateImport) {\n importNode.skip = true;\n } else {\n importNode.skip = () => {\n if (fullPath in importVisitor.onceFileDetectionMap) {\n return true;\n }\n importVisitor.onceFileDetectionMap[fullPath] = true;\n return false;\n };\n }\n }\n\n if (!fullPath && isOptional) {\n importNode.skip = true;\n }\n\n if (root) {\n importNode.root = root;\n importNode.importedFilename = fullPath;\n\n if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) {\n importVisitor.recursionDetector[fullPath] = true;\n\n const oldContext = this.context;\n this.context = context;\n try {\n this._visitor.visit(root);\n } catch (e) {\n this.error = e;\n }\n this.context = oldContext;\n }\n }\n\n importVisitor.importCount--;\n\n if (importVisitor.isFinished) {\n importVisitor._sequencer.tryRun();\n }\n },\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.unshift(declNode);\n } else {\n visitArgs.visitDeeper = false;\n }\n },\n visitDeclarationOut: function(declNode) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.shift();\n }\n },\n visitAtRule: function (atRuleNode, visitArgs) {\n this.context.frames.unshift(atRuleNode);\n },\n visitAtRuleOut: function (atRuleNode) {\n this.context.frames.shift();\n },\n visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {\n this.context.frames.unshift(mixinDefinitionNode);\n },\n visitMixinDefinitionOut: function (mixinDefinitionNode) {\n this.context.frames.shift();\n },\n visitRuleset: function (rulesetNode, visitArgs) {\n this.context.frames.unshift(rulesetNode);\n },\n visitRulesetOut: function (rulesetNode) {\n this.context.frames.shift();\n },\n visitMedia: function (mediaNode, visitArgs) {\n this.context.frames.unshift(mediaNode.rules[0]);\n },\n visitMediaOut: function (mediaNode) {\n this.context.frames.shift();\n }\n};\nexport default ImportVisitor;\n","class SetTreeVisibilityVisitor {\n constructor(visible) {\n this.visible = visible;\n }\n\n run(root) {\n this.visit(root);\n }\n\n visitArray(nodes) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n if (node.constructor === Array) {\n return this.visitArray(node);\n }\n\n if (!node.blocksVisibility || node.blocksVisibility()) {\n return node;\n }\n if (this.visible) {\n node.ensureVisibility();\n } else {\n node.ensureInvisibility();\n }\n\n node.accept(this);\n return node;\n }\n}\n\nexport default SetTreeVisibilityVisitor;","import tree from '../tree';\nimport Visitor from './visitor';\nimport logger from '../logger';\nimport * as utils from '../utils';\n\n/* jshint loopfunc:true */\n\nclass ExtendFinderVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n this.contexts = [];\n this.allExtendsStack = [[]];\n }\n\n run(root) {\n root = this._visitor.visit(root);\n root.allExtends = this.allExtendsStack[0];\n return root;\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n\n let i;\n let j;\n let extend;\n const allSelectorsExtendList = [];\n let extendList;\n\n // get &:extend(.a); rules which apply to all selectors in this ruleset\n const rules = rulesetNode.rules;\n\n const ruleCnt = rules ? rules.length : 0;\n for (i = 0; i < ruleCnt; i++) {\n if (rulesetNode.rules[i] instanceof tree.Extend) {\n allSelectorsExtendList.push(rules[i]);\n rulesetNode.extendOnEveryPath = true;\n }\n }\n\n // now find every selector and apply the extends that apply to all extends\n // and the ones which apply to an individual extend\n const paths = rulesetNode.paths;\n for (i = 0; i < paths.length; i++) {\n const selectorPath = paths[i];\n const selector = selectorPath[selectorPath.length - 1];\n const selExtendList = selector.extendList;\n\n extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList)\n : allSelectorsExtendList;\n\n if (extendList) {\n extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone());\n }\n\n for (j = 0; j < extendList.length; j++) {\n this.foundExtends = true;\n extend = extendList[j];\n extend.findSelfSelectors(selectorPath);\n extend.ruleset = rulesetNode;\n if (j === 0) { extend.firstExtendOnThisSelectorPath = true; }\n this.allExtendsStack[this.allExtendsStack.length - 1].push(extend);\n }\n }\n\n this.contexts.push(rulesetNode.selectors);\n }\n\n visitRulesetOut(rulesetNode) {\n if (!rulesetNode.root) {\n this.contexts.length = this.contexts.length - 1;\n }\n }\n\n visitMedia(mediaNode, visitArgs) {\n mediaNode.allExtends = [];\n this.allExtendsStack.push(mediaNode.allExtends);\n }\n\n visitMediaOut(mediaNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n atRuleNode.allExtends = [];\n this.allExtendsStack.push(atRuleNode.allExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n}\n\nclass ProcessExtendsVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n const extendFinder = new ExtendFinderVisitor();\n this.extendIndices = {};\n extendFinder.run(root);\n if (!extendFinder.foundExtends) { return root; }\n root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends));\n this.allExtendsStack = [root.allExtends];\n const newRoot = this._visitor.visit(root);\n this.checkExtendsForNonMatched(root.allExtends);\n return newRoot;\n }\n\n checkExtendsForNonMatched(extendList) {\n const indices = this.extendIndices;\n extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => {\n let selector = '_unknown_';\n try {\n selector = extend.selector.toCSS({});\n }\n catch (_) {}\n\n if (!indices[`${extend.index} ${selector}`]) {\n indices[`${extend.index} ${selector}`] = true;\n logger.warn(`extend '${selector}' has no matches`);\n }\n });\n }\n\n doExtendChaining(extendsList, extendsListTarget, iterationCount) {\n //\n // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering\n // and pasting the selector we would do normally, but we are also adding an extend with the same target selector\n // this means this new extend can then go and alter other extends\n //\n // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors\n // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already\n // processed if we look at each selector at a time, as is done in visitRuleset\n\n let extendIndex;\n\n let targetExtendIndex;\n let matches;\n const extendsToAdd = [];\n let newSelector;\n const extendVisitor = this;\n let selectorPath;\n let extend;\n let targetExtend;\n let newExtend;\n\n iterationCount = iterationCount || 0;\n\n // loop through comparing every extend with every target extend.\n // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place\n // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one\n // and the second is the target.\n // the separation into two lists allows us to process a subset of chains with a bigger set, as is the\n // case when processing media queries\n for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) {\n for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) {\n\n extend = extendsList[extendIndex];\n targetExtend = extendsListTarget[targetExtendIndex];\n\n // look for circular references\n if ( extend.parent_ids.indexOf( targetExtend.object_id ) >= 0 ) { continue; }\n\n // find a match in the target extends self selector (the bit before :extend)\n selectorPath = [targetExtend.selfSelectors[0]];\n matches = extendVisitor.findMatch(extend, selectorPath);\n\n if (matches.length) {\n extend.hasFoundMatches = true;\n\n // we found a match, so for each self selector..\n extend.selfSelectors.forEach(selfSelector => {\n const info = targetExtend.visibilityInfo();\n\n // process the extend as usual\n newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible());\n\n // but now we create a new extend from it\n newExtend = new(tree.Extend)(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info);\n newExtend.selfSelectors = newSelector;\n\n // add the extend onto the list of extends for that selector\n newSelector[newSelector.length - 1].extendList = [newExtend];\n\n // record that we need to add it.\n extendsToAdd.push(newExtend);\n newExtend.ruleset = targetExtend.ruleset;\n\n // remember its parents for circular references\n newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids);\n\n // only process the selector once.. if we have :extend(.a,.b) then multiple\n // extends will look at the same selector path, so when extending\n // we know that any others will be duplicates in terms of what is added to the css\n if (targetExtend.firstExtendOnThisSelectorPath) {\n newExtend.firstExtendOnThisSelectorPath = true;\n targetExtend.ruleset.paths.push(newSelector);\n }\n });\n }\n }\n }\n\n if (extendsToAdd.length) {\n // try to detect circular references to stop a stack overflow.\n // may no longer be needed.\n this.extendChainCount++;\n if (iterationCount > 100) {\n let selectorOne = '{unable to calculate}';\n let selectorTwo = '{unable to calculate}';\n try {\n selectorOne = extendsToAdd[0].selfSelectors[0].toCSS();\n selectorTwo = extendsToAdd[0].selector.toCSS();\n }\n catch (e) {}\n throw { message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})`};\n }\n\n // now process the new extends on the existing rules so that we can handle a extending b extending c extending\n // d extending e...\n return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1));\n } else {\n return extendsToAdd;\n }\n }\n\n visitDeclaration(ruleNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitSelector(selectorNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n let matches;\n let pathIndex;\n let extendIndex;\n const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1];\n const selectorsToAdd = [];\n const extendVisitor = this;\n let selectorPath;\n\n // look at each selector path in the ruleset, find any extend matches and then copy, find and replace\n\n for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) {\n for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) {\n selectorPath = rulesetNode.paths[pathIndex];\n\n // extending extends happens initially, before the main pass\n if (rulesetNode.extendOnEveryPath) { continue; }\n const extendList = selectorPath[selectorPath.length - 1].extendList;\n if (extendList && extendList.length) { continue; }\n\n matches = this.findMatch(allExtends[extendIndex], selectorPath);\n\n if (matches.length) {\n allExtends[extendIndex].hasFoundMatches = true;\n\n allExtends[extendIndex].selfSelectors.forEach(selfSelector => {\n let extendedSelectors;\n extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible());\n selectorsToAdd.push(extendedSelectors);\n });\n }\n }\n }\n rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd);\n }\n\n findMatch(extend, haystackSelectorPath) {\n //\n // look through the haystack selector path to try and find the needle - extend.selector\n // returns an array of selector matches that can then be replaced\n //\n let haystackSelectorIndex;\n\n let hackstackSelector;\n let hackstackElementIndex;\n let haystackElement;\n let targetCombinator;\n let i;\n const extendVisitor = this;\n const needleElements = extend.selector.elements;\n const potentialMatches = [];\n let potentialMatch;\n const matches = [];\n\n // loop through the haystack elements\n for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) {\n hackstackSelector = haystackSelectorPath[haystackSelectorIndex];\n\n for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) {\n\n haystackElement = hackstackSelector.elements[hackstackElementIndex];\n\n // if we allow elements before our match we can add a potential match every time. otherwise only at the first element.\n if (extend.allowBefore || (haystackSelectorIndex === 0 && hackstackElementIndex === 0)) {\n potentialMatches.push({pathIndex: haystackSelectorIndex, index: hackstackElementIndex, matched: 0,\n initialCombinator: haystackElement.combinator});\n }\n\n for (i = 0; i < potentialMatches.length; i++) {\n potentialMatch = potentialMatches[i];\n\n // selectors add \" \" onto the first element. When we use & it joins the selectors together, but if we don't\n // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to\n // work out what the resulting combinator will be\n targetCombinator = haystackElement.combinator.value;\n if (targetCombinator === '' && hackstackElementIndex === 0) {\n targetCombinator = ' ';\n }\n\n // if we don't match, null our match to indicate failure\n if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) ||\n (potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator)) {\n potentialMatch = null;\n } else {\n potentialMatch.matched++;\n }\n\n // if we are still valid and have finished, test whether we have elements after and whether these are allowed\n if (potentialMatch) {\n potentialMatch.finished = potentialMatch.matched === needleElements.length;\n if (potentialMatch.finished &&\n (!extend.allowAfter &&\n (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length))) {\n potentialMatch = null;\n }\n }\n // if null we remove, if not, we are still valid, so either push as a valid match or continue\n if (potentialMatch) {\n if (potentialMatch.finished) {\n potentialMatch.length = needleElements.length;\n potentialMatch.endPathIndex = haystackSelectorIndex;\n potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match\n potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again\n matches.push(potentialMatch);\n }\n } else {\n potentialMatches.splice(i, 1);\n i--;\n }\n }\n }\n }\n return matches;\n }\n\n isElementValuesEqual(elementValue1, elementValue2) {\n if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') {\n return elementValue1 === elementValue2;\n }\n if (elementValue1 instanceof tree.Attribute) {\n if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) {\n return false;\n }\n if (!elementValue1.value || !elementValue2.value) {\n if (elementValue1.value || elementValue2.value) {\n return false;\n }\n return true;\n }\n elementValue1 = elementValue1.value.value || elementValue1.value;\n elementValue2 = elementValue2.value.value || elementValue2.value;\n return elementValue1 === elementValue2;\n }\n elementValue1 = elementValue1.value;\n elementValue2 = elementValue2.value;\n if (elementValue1 instanceof tree.Selector) {\n if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) {\n return false;\n }\n for (let i = 0; i < elementValue1.elements.length; i++) {\n if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) {\n if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) {\n return false;\n }\n }\n if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) {\n return false;\n }\n }\n return true;\n }\n return false;\n }\n\n extendSelector(matches, selectorPath, replacementSelector, isVisible) {\n // for a set of matches, replace each match with the replacement selector\n\n let currentSelectorPathIndex = 0;\n\n let currentSelectorPathElementIndex = 0;\n let path = [];\n let matchIndex;\n let selector;\n let firstElement;\n let match;\n let newElements;\n\n for (matchIndex = 0; matchIndex < matches.length; matchIndex++) {\n match = matches[matchIndex];\n selector = selectorPath[match.pathIndex];\n firstElement = new tree.Element(\n match.initialCombinator,\n replacementSelector.elements[0].value,\n replacementSelector.elements[0].isVariable,\n replacementSelector.elements[0].getIndex(),\n replacementSelector.elements[0].fileInfo()\n );\n\n if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n\n newElements = selector.elements\n .slice(currentSelectorPathElementIndex, match.index)\n .concat([firstElement])\n .concat(replacementSelector.elements.slice(1));\n\n if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) {\n path[path.length - 1].elements =\n path[path.length - 1].elements.concat(newElements);\n } else {\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex));\n\n path.push(new tree.Selector(\n newElements\n ));\n }\n currentSelectorPathIndex = match.endPathIndex;\n currentSelectorPathElementIndex = match.endPathElementIndex;\n if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) {\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n }\n\n if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathIndex++;\n }\n\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length));\n path = path.map(currentValue => {\n // we can re-use elements here, because the visibility property matters only for selectors\n const derived = currentValue.createDerived(currentValue.elements);\n if (isVisible) {\n derived.ensureVisibility();\n } else {\n derived.ensureInvisibility();\n }\n return derived;\n });\n return path;\n }\n\n visitMedia(mediaNode, visitArgs) {\n let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitMediaOut(mediaNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n}\n\nexport default ProcessExtendsVisitor;\n","import Visitor from './visitor';\n\nclass JoinSelectorVisitor {\n constructor() {\n this.contexts = [[]];\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n return this._visitor.visit(root);\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n const paths = [];\n let selectors;\n\n this.contexts.push(paths);\n\n if (!rulesetNode.root) {\n selectors = rulesetNode.selectors;\n if (selectors) {\n selectors = selectors.filter(selector => selector.getIsOutput());\n rulesetNode.selectors = selectors.length ? selectors : (selectors = null);\n if (selectors) { rulesetNode.joinSelectors(paths, context, selectors); }\n }\n if (!selectors) { rulesetNode.rules = null; }\n rulesetNode.paths = paths;\n }\n }\n\n visitRulesetOut(rulesetNode) {\n this.contexts.length = this.contexts.length - 1;\n }\n\n visitMedia(mediaNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia);\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n if (atRuleNode.rules && atRuleNode.rules.length) {\n atRuleNode.rules[0].root = (atRuleNode.isRooted || context.length === 0 || null);\n }\n }\n}\n\nexport default JoinSelectorVisitor;\n","import tree from '../tree';\nimport Visitor from './visitor';\n\nclass CSSVisitorUtils {\n constructor(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n }\n\n containsSilentNonBlockedChild(bodyRules) {\n let rule;\n if (!bodyRules) {\n return false;\n }\n for (let r = 0; r < bodyRules.length; r++) {\n rule = bodyRules[r];\n if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) {\n // the atrule contains something that was referenced (likely by extend)\n // therefore it needs to be shown in output too\n return true;\n }\n }\n return false;\n }\n\n keepOnlyVisibleChilds(owner) {\n if (owner && owner.rules) {\n owner.rules = owner.rules.filter(thing => thing.isVisible());\n }\n }\n\n isEmpty(owner) {\n return (owner && owner.rules) \n ? (owner.rules.length === 0) : true;\n }\n\n hasVisibleSelector(rulesetNode) {\n return (rulesetNode && rulesetNode.paths)\n ? (rulesetNode.paths.length > 0) : false;\n }\n\n resolveVisibility(node, originalRules) {\n if (!node.blocksVisibility()) {\n if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) {\n return ;\n }\n\n return node;\n }\n\n const compiledRulesBody = node.rules[0];\n this.keepOnlyVisibleChilds(compiledRulesBody);\n\n if (this.isEmpty(compiledRulesBody)) {\n return ;\n }\n\n node.ensureVisibility();\n node.removeVisibilityBlock();\n\n return node;\n }\n\n isVisibleRuleset(rulesetNode) {\n if (rulesetNode.firstRoot) {\n return true;\n }\n\n if (this.isEmpty(rulesetNode)) {\n return false;\n }\n\n if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) {\n return false;\n }\n\n return true;\n }\n}\n\nconst ToCSSVisitor = function(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n this.utils = new CSSVisitorUtils(context);\n};\n\nToCSSVisitor.prototype = {\n isReplacing: true,\n run: function (root) {\n return this._visitor.visit(root);\n },\n\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.blocksVisibility() || declNode.variable) {\n return;\n }\n return declNode;\n },\n\n visitMixinDefinition: function (mixinNode, visitArgs) {\n // mixin definitions do not get eval'd - this means they keep state\n // so we have to clear that state here so it isn't used if toCSS is called twice\n mixinNode.frames = [];\n },\n\n visitExtend: function (extendNode, visitArgs) {\n },\n\n visitComment: function (commentNode, visitArgs) {\n if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) {\n return;\n }\n return commentNode;\n },\n\n visitMedia: function(mediaNode, visitArgs) {\n const originalRules = mediaNode.rules[0].rules;\n mediaNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n return this.utils.resolveVisibility(mediaNode, originalRules);\n },\n\n visitImport: function (importNode, visitArgs) {\n if (importNode.blocksVisibility()) {\n return ;\n }\n return importNode;\n },\n\n visitAtRule: function(atRuleNode, visitArgs) {\n if (atRuleNode.rules && atRuleNode.rules.length) {\n return this.visitAtRuleWithBody(atRuleNode, visitArgs);\n } else {\n return this.visitAtRuleWithoutBody(atRuleNode, visitArgs);\n }\n },\n\n visitAnonymous: function(anonymousNode, visitArgs) {\n if (!anonymousNode.blocksVisibility()) {\n anonymousNode.accept(this._visitor);\n return anonymousNode;\n }\n },\n\n visitAtRuleWithBody: function(atRuleNode, visitArgs) {\n // if there is only one nested ruleset and that one has no path, then it is\n // just fake ruleset\n function hasFakeRuleset(atRuleNode) {\n const bodyRules = atRuleNode.rules;\n return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0);\n }\n function getBodyRules(atRuleNode) {\n const nodeRules = atRuleNode.rules;\n if (hasFakeRuleset(atRuleNode)) {\n return nodeRules[0].rules;\n }\n\n return nodeRules;\n }\n // it is still true that it is only one ruleset in array\n // this is last such moment\n // process childs\n const originalRules = getBodyRules(atRuleNode);\n atRuleNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n if (!this.utils.isEmpty(atRuleNode)) {\n this._mergeRules(atRuleNode.rules[0].rules);\n }\n\n return this.utils.resolveVisibility(atRuleNode, originalRules);\n },\n\n visitAtRuleWithoutBody: function(atRuleNode, visitArgs) {\n if (atRuleNode.blocksVisibility()) {\n return;\n }\n\n if (atRuleNode.name === '@charset') {\n // Only output the debug info together with subsequent @charset definitions\n // a comment (or @media statement) before the actual @charset atrule would\n // be considered illegal css as it has to be on the first line\n if (this.charset) {\n if (atRuleNode.debugInfo) {\n const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\\n/g, '')} */\\n`);\n comment.debugInfo = atRuleNode.debugInfo;\n return this._visitor.visit(comment);\n }\n return;\n }\n this.charset = true;\n }\n\n return atRuleNode;\n },\n\n checkValidNodes: function(rules, isRoot) {\n if (!rules) {\n return;\n }\n\n for (let i = 0; i < rules.length; i++) {\n const ruleNode = rules[i];\n if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) {\n throw { message: 'Properties must be inside selector blocks. They cannot be in the root',\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode instanceof tree.Call) {\n throw { message: `Function '${ruleNode.name}' is undefined`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode.type && !ruleNode.allowRoot) {\n throw { message: `${ruleNode.type} node returned by a function is not valid here`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n }\n },\n\n visitRuleset: function (rulesetNode, visitArgs) {\n // at this point rulesets are nested into each other\n let rule;\n\n const rulesets = [];\n\n this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot);\n\n if (!rulesetNode.root) {\n // remove invisible paths\n this._compileRulesetPaths(rulesetNode);\n\n // remove rulesets from this ruleset body and compile them separately\n const nodeRules = rulesetNode.rules;\n\n let nodeRuleCnt = nodeRules ? nodeRules.length : 0;\n for (let i = 0; i < nodeRuleCnt; ) {\n rule = nodeRules[i];\n if (rule && rule.rules) {\n // visit because we are moving them out from being a child\n rulesets.push(this._visitor.visit(rule));\n nodeRules.splice(i, 1);\n nodeRuleCnt--;\n continue;\n }\n i++;\n }\n // accept the visitor to remove rules and refactor itself\n // then we can decide nogw whether we want it or not\n // compile body\n if (nodeRuleCnt > 0) {\n rulesetNode.accept(this._visitor);\n } else {\n rulesetNode.rules = null;\n }\n visitArgs.visitDeeper = false;\n } else { // if (! rulesetNode.root) {\n rulesetNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n }\n\n if (rulesetNode.rules) {\n this._mergeRules(rulesetNode.rules);\n this._removeDuplicateRules(rulesetNode.rules);\n }\n\n // now decide whether we keep the ruleset\n if (this.utils.isVisibleRuleset(rulesetNode)) {\n rulesetNode.ensureVisibility();\n rulesets.splice(0, 0, rulesetNode);\n }\n\n if (rulesets.length === 1) {\n return rulesets[0];\n }\n return rulesets;\n },\n\n _compileRulesetPaths: function(rulesetNode) {\n if (rulesetNode.paths) {\n rulesetNode.paths = rulesetNode.paths\n .filter(p => {\n let i;\n if (p[0].elements[0].combinator.value === ' ') {\n p[0].elements[0].combinator = new(tree.Combinator)('');\n }\n for (i = 0; i < p.length; i++) {\n if (p[i].isVisible() && p[i].getIsOutput()) {\n return true;\n }\n }\n return false;\n });\n }\n },\n\n _removeDuplicateRules: function(rules) {\n if (!rules) { return; }\n\n // remove duplicates\n const ruleCache = {};\n\n let ruleList;\n let rule;\n let i;\n\n for (i = rules.length - 1; i >= 0 ; i--) {\n rule = rules[i];\n if (rule instanceof tree.Declaration) {\n if (!ruleCache[rule.name]) {\n ruleCache[rule.name] = rule;\n } else {\n ruleList = ruleCache[rule.name];\n if (ruleList instanceof tree.Declaration) {\n ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)];\n }\n const ruleCSS = rule.toCSS(this._context);\n if (ruleList.indexOf(ruleCSS) !== -1) {\n rules.splice(i, 1);\n } else {\n ruleList.push(ruleCSS);\n }\n }\n }\n }\n },\n\n _mergeRules: function(rules) {\n if (!rules) {\n return; \n }\n\n const groups = {};\n const groupsArr = [];\n\n for (let i = 0; i < rules.length; i++) {\n const rule = rules[i];\n if (rule.merge) {\n const key = rule.name;\n groups[key] ? rules.splice(i--, 1) : \n groupsArr.push(groups[key] = []);\n groups[key].push(rule);\n }\n }\n\n groupsArr.forEach(group => {\n if (group.length > 0) {\n const result = group[0];\n let space = [];\n const comma = [new tree.Expression(space)];\n group.forEach(rule => {\n if ((rule.merge === '+') && (space.length > 0)) {\n comma.push(new tree.Expression(space = []));\n }\n space.push(rule.value);\n result.important = result.important || rule.important;\n });\n result.value = new tree.Value(comma);\n }\n });\n }\n};\n\nexport default ToCSSVisitor;\n","import Visitor from './visitor';\nimport ImportVisitor from './import-visitor';\nimport MarkVisibleSelectorsVisitor from './set-tree-visibility-visitor';\nimport ExtendVisitor from './extend-visitor';\nimport JoinSelectorVisitor from './join-selector-visitor';\nimport ToCSSVisitor from './to-css-visitor';\n\nexport default {\n Visitor,\n ImportVisitor,\n MarkVisibleSelectorsVisitor,\n ExtendVisitor,\n JoinSelectorVisitor,\n ToCSSVisitor\n};\n","// Split the input into chunks.\nexport default (input, fail) => {\n const len = input.length;\n let level = 0;\n let parenLevel = 0;\n let lastOpening;\n let lastOpeningParen;\n let lastMultiComment;\n let lastMultiCommentEndBrace;\n const chunks = [];\n let emitFrom = 0;\n let chunkerCurrentIndex;\n let currentChunkStartIndex;\n let cc;\n let cc2;\n let matched;\n\n function emitChunk(force) {\n const len = chunkerCurrentIndex - emitFrom;\n if (((len < 512) && !force) || !len) {\n return;\n }\n chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1));\n emitFrom = chunkerCurrentIndex + 1;\n }\n\n for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc = input.charCodeAt(chunkerCurrentIndex);\n if (((cc >= 97) && (cc <= 122)) || (cc < 34)) {\n // a-z or whitespace\n continue;\n }\n\n switch (cc) {\n case 40: // (\n parenLevel++;\n lastOpeningParen = chunkerCurrentIndex;\n continue;\n case 41: // )\n if (--parenLevel < 0) {\n return fail('missing opening `(`', chunkerCurrentIndex);\n }\n continue;\n case 59: // ;\n if (!parenLevel) { emitChunk(); }\n continue;\n case 123: // {\n level++;\n lastOpening = chunkerCurrentIndex;\n continue;\n case 125: // }\n if (--level < 0) {\n return fail('missing opening `{`', chunkerCurrentIndex);\n }\n if (!level && !parenLevel) { emitChunk(); }\n continue;\n case 92: // \\\n if (chunkerCurrentIndex < len - 1) { chunkerCurrentIndex++; continue; }\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n case 34:\n case 39:\n case 96: // \", ' and `\n matched = 0;\n currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 > 96) { continue; }\n if (cc2 == cc) { matched = 1; break; }\n if (cc2 == 92) { // \\\n if (chunkerCurrentIndex == len - 1) {\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n }\n chunkerCurrentIndex++;\n }\n }\n if (matched) { continue; }\n return fail(`unmatched \\`${String.fromCharCode(cc)}\\``, currentChunkStartIndex);\n case 47: // /, check for comment\n if (parenLevel || (chunkerCurrentIndex == len - 1)) { continue; }\n cc2 = input.charCodeAt(chunkerCurrentIndex + 1);\n if (cc2 == 47) {\n // //, find lnfeed\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if ((cc2 <= 13) && ((cc2 == 10) || (cc2 == 13))) { break; }\n }\n } else if (cc2 == 42) {\n // /*, find */\n lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 == 125) { lastMultiCommentEndBrace = chunkerCurrentIndex; }\n if (cc2 != 42) { continue; }\n if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { break; }\n }\n if (chunkerCurrentIndex == len - 1) {\n return fail('missing closing `*/`', currentChunkStartIndex);\n }\n chunkerCurrentIndex++;\n }\n continue;\n case 42: // *, check for unmatched */\n if ((chunkerCurrentIndex < len - 1) && (input.charCodeAt(chunkerCurrentIndex + 1) == 47)) {\n return fail('unmatched `/*`', chunkerCurrentIndex);\n }\n continue;\n }\n }\n\n if (level !== 0) {\n if ((lastMultiComment > lastOpening) && (lastMultiCommentEndBrace > lastMultiComment)) {\n return fail('missing closing `}` or `*/`', lastOpening);\n } else {\n return fail('missing closing `}`', lastOpening);\n }\n } else if (parenLevel !== 0) {\n return fail('missing closing `)`', lastOpeningParen);\n }\n\n emitChunk(true);\n return chunks;\n};\n","import chunker from './chunker';\n\nexport default () => {\n let // Less input string\n input;\n\n let // current chunk\n j;\n\n const // holds state for backtracking\n saveStack = [];\n\n let // furthest index the parser has gone to\n furthest;\n\n let // if this is furthest we got to, this is the probably cause\n furthestPossibleErrorMessage;\n\n let // chunkified input\n chunks;\n\n let // current chunk\n current;\n\n let // index of current chunk, in `input`\n currentPos;\n\n const parserInput = {};\n const CHARCODE_SPACE = 32;\n const CHARCODE_TAB = 9;\n const CHARCODE_LF = 10;\n const CHARCODE_CR = 13;\n const CHARCODE_PLUS = 43;\n const CHARCODE_COMMA = 44;\n const CHARCODE_FORWARD_SLASH = 47;\n const CHARCODE_9 = 57;\n\n function skipWhitespace(length) {\n const oldi = parserInput.i;\n const oldj = j;\n const curr = parserInput.i - currentPos;\n const endIndex = parserInput.i + current.length - curr;\n const mem = (parserInput.i += length);\n const inp = input;\n let c;\n let nextChar;\n let comment;\n\n for (; parserInput.i < endIndex; parserInput.i++) {\n c = inp.charCodeAt(parserInput.i);\n\n if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) {\n nextChar = inp.charAt(parserInput.i + 1);\n if (nextChar === '/') {\n comment = {index: parserInput.i, isLineComment: true};\n let nextNewLine = inp.indexOf('\\n', parserInput.i + 2);\n if (nextNewLine < 0) {\n nextNewLine = endIndex;\n }\n parserInput.i = nextNewLine;\n comment.text = inp.substr(comment.index, parserInput.i - comment.index);\n parserInput.commentStore.push(comment);\n continue;\n } else if (nextChar === '*') {\n const nextStarSlash = inp.indexOf('*/', parserInput.i + 2);\n if (nextStarSlash >= 0) {\n comment = {\n index: parserInput.i,\n text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i),\n isLineComment: false\n };\n parserInput.i += comment.text.length - 1;\n parserInput.commentStore.push(comment);\n continue;\n }\n }\n break;\n }\n\n if ((c !== CHARCODE_SPACE) && (c !== CHARCODE_LF) && (c !== CHARCODE_TAB) && (c !== CHARCODE_CR)) {\n break;\n }\n }\n\n current = current.slice(length + parserInput.i - mem + curr);\n currentPos = parserInput.i;\n\n if (!current.length) {\n if (j < chunks.length - 1) {\n current = chunks[++j];\n skipWhitespace(0); // skip space at the beginning of a chunk\n return true; // things changed\n }\n parserInput.finished = true;\n }\n\n return oldi !== parserInput.i || oldj !== j;\n }\n\n parserInput.save = () => {\n currentPos = parserInput.i;\n saveStack.push( { current, i: parserInput.i, j });\n };\n parserInput.restore = possibleErrorMessage => {\n\n if (parserInput.i > furthest || (parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage)) {\n furthest = parserInput.i;\n furthestPossibleErrorMessage = possibleErrorMessage;\n }\n const state = saveStack.pop();\n current = state.current;\n currentPos = parserInput.i = state.i;\n j = state.j;\n };\n parserInput.forget = () => {\n saveStack.pop();\n };\n parserInput.isWhitespace = offset => {\n const pos = parserInput.i + (offset || 0);\n const code = input.charCodeAt(pos);\n return (code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF);\n };\n\n // Specialization of $(tok)\n parserInput.$re = tok => {\n if (parserInput.i > currentPos) {\n current = current.slice(parserInput.i - currentPos);\n currentPos = parserInput.i;\n }\n\n const m = tok.exec(current);\n if (!m) {\n return null;\n }\n\n skipWhitespace(m[0].length);\n if (typeof m === 'string') {\n return m;\n }\n\n return m.length === 1 ? m[0] : m;\n };\n\n parserInput.$char = tok => {\n if (input.charAt(parserInput.i) !== tok) {\n return null;\n }\n skipWhitespace(1);\n return tok;\n };\n\n parserInput.$str = tok => {\n const tokLength = tok.length;\n\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tokLength; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return null;\n }\n }\n\n skipWhitespace(tokLength);\n return tok;\n };\n\n parserInput.$quoted = loc => {\n const pos = loc || parserInput.i;\n const startChar = input.charAt(pos);\n\n if (startChar !== '\\'' && startChar !== '\"') {\n return;\n }\n const length = input.length;\n const currentPosition = pos;\n\n for (let i = 1; i + currentPosition < length; i++) {\n const nextChar = input.charAt(i + currentPosition);\n switch (nextChar) {\n case '\\\\':\n i++;\n continue;\n case '\\r':\n case '\\n':\n break;\n case startChar:\n const str = input.substr(currentPosition, i + 1);\n if (!loc && loc !== 0) {\n skipWhitespace(i + 1);\n return str\n }\n return [startChar, str];\n default:\n }\n }\n return null;\n };\n\n /**\n * Permissive parsing. Ignores everything except matching {} [] () and quotes\n * until matching token (outside of blocks)\n */\n parserInput.$parseUntil = tok => {\n let quote = '';\n let returnVal = null;\n let inComment = false;\n let blockDepth = 0;\n const blockStack = [];\n const parseGroups = [];\n const length = input.length;\n const startPos = parserInput.i;\n let lastPos = parserInput.i;\n let i = parserInput.i;\n let loop = true;\n let testChar;\n\n if (typeof tok === 'string') {\n testChar = char => char === tok\n } else {\n testChar = char => tok.test(char)\n }\n\n do {\n let prevChar;\n let nextChar = input.charAt(i);\n if (blockDepth === 0 && testChar(nextChar)) {\n returnVal = input.substr(lastPos, i - lastPos);\n if (returnVal) {\n parseGroups.push(returnVal);\n }\n else {\n parseGroups.push(' ');\n }\n returnVal = parseGroups;\n skipWhitespace(i - startPos);\n loop = false\n } else {\n if (inComment) {\n if (nextChar === '*' && \n input.charAt(i + 1) === '/') {\n i++;\n blockDepth--;\n inComment = false;\n }\n i++;\n continue;\n }\n switch (nextChar) {\n case '\\\\':\n i++;\n nextChar = input.charAt(i);\n parseGroups.push(input.substr(lastPos, i - lastPos + 1));\n lastPos = i + 1;\n break;\n case '/':\n if (input.charAt(i + 1) === '*') {\n i++;\n inComment = true;\n blockDepth++;\n }\n break;\n case '\\'':\n case '\"':\n quote = parserInput.$quoted(i);\n if (quote) {\n parseGroups.push(input.substr(lastPos, i - lastPos), quote);\n i += quote[1].length - 1;\n lastPos = i + 1;\n }\n else {\n skipWhitespace(i - startPos);\n returnVal = nextChar;\n loop = false;\n }\n break;\n case '{':\n blockStack.push('}');\n blockDepth++;\n break;\n case '(':\n blockStack.push(')');\n blockDepth++;\n break;\n case '[':\n blockStack.push(']');\n blockDepth++;\n break;\n case '}':\n case ')':\n case ']':\n const expected = blockStack.pop();\n if (nextChar === expected) {\n blockDepth--;\n } else {\n // move the parser to the error and return expected\n skipWhitespace(i - startPos);\n returnVal = expected;\n loop = false;\n }\n }\n i++;\n if (i > length) {\n loop = false;\n }\n }\n prevChar = nextChar;\n } while (loop);\n\n return returnVal ? returnVal : null;\n }\n\n parserInput.autoCommentAbsorb = true;\n parserInput.commentStore = [];\n parserInput.finished = false;\n\n // Same as $(), but don't change the state of the parser,\n // just return the match.\n parserInput.peek = tok => {\n if (typeof tok === 'string') {\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tok.length; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return false;\n }\n }\n return true;\n } else {\n return tok.test(current);\n }\n };\n\n // Specialization of peek()\n // TODO remove or change some currentChar calls to peekChar\n parserInput.peekChar = tok => input.charAt(parserInput.i) === tok;\n\n parserInput.currentChar = () => input.charAt(parserInput.i);\n\n parserInput.prevChar = () => input.charAt(parserInput.i - 1);\n\n parserInput.getInput = () => input;\n\n parserInput.peekNotNumeric = () => {\n const c = input.charCodeAt(parserInput.i);\n // Is the first char of the dimension 0-9, '.', '+' or '-'\n return (c > CHARCODE_9 || c < CHARCODE_PLUS) || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA;\n };\n\n parserInput.start = (str, chunkInput, failFunction) => {\n input = str;\n parserInput.i = j = currentPos = furthest = 0;\n\n // chunking apparently makes things quicker (but my tests indicate\n // it might actually make things slower in node at least)\n // and it is a non-perfect parse - it can't recognise\n // unquoted urls, meaning it can't distinguish comments\n // meaning comments with quotes or {}() in them get 'counted'\n // and then lead to parse errors.\n // In addition if the chunking chunks in the wrong place we might\n // not be able to parse a parser statement in one go\n // this is officially deprecated but can be switched on via an option\n // in the case it causes too much performance issues.\n if (chunkInput) {\n chunks = chunker(str, failFunction);\n } else {\n chunks = [str];\n }\n\n current = chunks[0];\n\n skipWhitespace(0);\n };\n\n parserInput.end = () => {\n let message;\n const isFinished = parserInput.i >= input.length;\n\n if (parserInput.i < furthest) {\n message = furthestPossibleErrorMessage;\n parserInput.i = furthest;\n }\n return {\n isFinished,\n furthest: parserInput.i,\n furthestPossibleErrorMessage: message,\n furthestReachedEnd: parserInput.i >= input.length - 1,\n furthestChar: input[parserInput.i]\n };\n };\n\n return parserInput;\n};\n","import LessError from '../less-error';\nimport tree from '../tree';\nimport visitors from '../visitors';\nimport getParserInput from './parser-input';\nimport * as utils from '../utils';\nimport functionRegistry from '../functions/function-registry';\n\n//\n// less.js - parser\n//\n// A relatively straight-forward predictive parser.\n// There is no tokenization/lexing stage, the input is parsed\n// in one sweep.\n//\n// To make the parser fast enough to run in the browser, several\n// optimization had to be made:\n//\n// - Matching and slicing on a huge input is often cause of slowdowns.\n// The solution is to chunkify the input into smaller strings.\n// The chunks are stored in the `chunks` var,\n// `j` holds the current chunk index, and `currentPos` holds\n// the index of the current chunk in relation to `input`.\n// This gives us an almost 4x speed-up.\n//\n// - In many cases, we don't need to match individual tokens;\n// for example, if a value doesn't hold any variables, operations\n// or dynamic references, the parser can effectively 'skip' it,\n// treating it as a literal.\n// An example would be '1px solid #000' - which evaluates to itself,\n// we don't need to know what the individual components are.\n// The drawback, of course is that you don't get the benefits of\n// syntax-checking on the CSS. This gives us a 50% speed-up in the parser,\n// and a smaller speed-up in the code-gen.\n//\n//\n// Token matching is done with the `$` function, which either takes\n// a terminal string or regexp, or a non-terminal function to call.\n// It also takes care of moving all the indices forwards.\n//\n\nconst Parser = function Parser(context, imports, fileInfo) {\n let parsers;\n const parserInput = getParserInput();\n\n function error(msg, type) {\n throw new LessError(\n {\n index: parserInput.i,\n filename: fileInfo.filename,\n type: type || 'Syntax',\n message: msg\n },\n imports\n );\n }\n\n function expect(arg, msg) {\n // some older browsers return typeof 'function' for RegExp\n const result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg);\n if (result) {\n return result;\n }\n \n error(msg || (typeof arg === 'string'\n ? `expected '${arg}' got '${parserInput.currentChar()}'`\n : 'unexpected token'));\n }\n\n // Specialization of expect()\n function expectChar(arg, msg) {\n if (parserInput.$char(arg)) {\n return arg;\n }\n error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`);\n }\n\n function getDebugInfo(index) {\n const filename = fileInfo.filename;\n\n return {\n lineNumber: utils.getLocation(index, parserInput.getInput()).line + 1,\n fileName: filename\n };\n }\n\n /**\n * Used after initial parsing to create nodes on the fly\n * \n * @param {String} str - string to parse \n * @param {Array} parseList - array of parsers to run input through e.g. [\"value\", \"important\"]\n * @param {Number} currentIndex - start number to begin indexing\n * @param {Object} fileInfo - fileInfo to attach to created nodes\n */\n function parseNode(str, parseList, currentIndex, fileInfo, callback) {\n let result;\n const returnNodes = [];\n const parser = parserInput;\n\n try {\n parser.start(str, false, function fail(msg, index) {\n callback({\n message: msg,\n index: index + currentIndex\n });\n });\n for (let x = 0, p, i; (p = parseList[x]); x++) {\n i = parser.i;\n result = parsers[p]();\n if (result) {\n result._index = i + currentIndex;\n result._fileInfo = fileInfo;\n returnNodes.push(result);\n }\n else {\n returnNodes.push(null);\n }\n }\n\n const endInfo = parser.end();\n if (endInfo.isFinished) {\n callback(null, returnNodes);\n }\n else {\n callback(true, null);\n }\n } catch (e) {\n throw new LessError({\n index: e.index + currentIndex,\n message: e.message\n }, imports, fileInfo.filename);\n }\n }\n\n //\n // The Parser\n //\n return {\n parserInput,\n imports,\n fileInfo,\n parseNode,\n //\n // Parse an input string into an abstract syntax tree,\n // @param str A string containing 'less' markup\n // @param callback call `callback` when done.\n // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply\n //\n parse: function (str, callback, additionalData) {\n let root;\n let error = null;\n let globalVars;\n let modifyVars;\n let ignored;\n let preText = '';\n\n globalVars = (additionalData && additionalData.globalVars) ? `${Parser.serializeVars(additionalData.globalVars)}\\n` : '';\n modifyVars = (additionalData && additionalData.modifyVars) ? `\\n${Parser.serializeVars(additionalData.modifyVars)}` : '';\n\n if (context.pluginManager) {\n const preProcessors = context.pluginManager.getPreProcessors();\n for (let i = 0; i < preProcessors.length; i++) {\n str = preProcessors[i].process(str, { context, imports, fileInfo });\n }\n }\n\n if (globalVars || (additionalData && additionalData.banner)) {\n preText = ((additionalData && additionalData.banner) ? additionalData.banner : '') + globalVars;\n ignored = imports.contentsIgnoredChars;\n ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0;\n ignored[fileInfo.filename] += preText.length;\n }\n\n str = str.replace(/\\r\\n?/g, '\\n');\n // Remove potential UTF Byte Order Mark\n str = preText + str.replace(/^\\uFEFF/, '') + modifyVars;\n imports.contents[fileInfo.filename] = str;\n\n // Start with the primary rule.\n // The whole syntax tree is held under a Ruleset node,\n // with the `root` property set to true, so no `{}` are\n // output. The callback is called when the input is parsed.\n try {\n parserInput.start(str, context.chunkInput, function fail(msg, index) {\n throw new LessError({\n index,\n type: 'Parse',\n message: msg,\n filename: fileInfo.filename\n }, imports);\n });\n\n tree.Node.prototype.parse = this;\n root = new tree.Ruleset(null, this.parsers.primary());\n tree.Node.prototype.rootNode = root;\n root.root = true;\n root.firstRoot = true;\n root.functionRegistry = functionRegistry.inherit();\n \n } catch (e) {\n return callback(new LessError(e, imports, fileInfo.filename));\n }\n\n // If `i` is smaller than the `input.length - 1`,\n // it means the parser wasn't able to parse the whole\n // string, so we've got a parsing error.\n //\n // We try to extract a \\n delimited string,\n // showing the line where the parse error occurred.\n // We split it up into two parts (the part which parsed,\n // and the part which didn't), so we can color them differently.\n const endInfo = parserInput.end();\n if (!endInfo.isFinished) {\n\n let message = endInfo.furthestPossibleErrorMessage;\n\n if (!message) {\n message = 'Unrecognised input';\n if (endInfo.furthestChar === '}') {\n message += '. Possibly missing opening \\'{\\'';\n } else if (endInfo.furthestChar === ')') {\n message += '. Possibly missing opening \\'(\\'';\n } else if (endInfo.furthestReachedEnd) {\n message += '. Possibly missing something';\n }\n }\n\n error = new LessError({\n type: 'Parse',\n message,\n index: endInfo.furthest,\n filename: fileInfo.filename\n }, imports);\n }\n\n const finish = e => {\n e = error || e || imports.error;\n\n if (e) {\n if (!(e instanceof LessError)) {\n e = new LessError(e, imports, fileInfo.filename);\n }\n\n return callback(e);\n }\n else {\n return callback(null, root);\n }\n };\n\n if (context.processImports !== false) {\n new visitors.ImportVisitor(imports, finish)\n .run(root);\n } else {\n return finish();\n }\n },\n\n //\n // Here in, the parsing rules/functions\n //\n // The basic structure of the syntax tree generated is as follows:\n //\n // Ruleset -> Declaration -> Value -> Expression -> Entity\n //\n // Here's some Less code:\n //\n // .class {\n // color: #fff;\n // border: 1px solid #000;\n // width: @w + 4px;\n // > .child {...}\n // }\n //\n // And here's what the parse tree might look like:\n //\n // Ruleset (Selector '.class', [\n // Declaration (\"color\", Value ([Expression [Color #fff]]))\n // Declaration (\"border\", Value ([Expression [Dimension 1px][Keyword \"solid\"][Color #000]]))\n // Declaration (\"width\", Value ([Expression [Operation \" + \" [Variable \"@w\"][Dimension 4px]]]))\n // Ruleset (Selector [Element '>', '.child'], [...])\n // ])\n //\n // In general, most rules will try to parse a token with the `$re()` function, and if the return\n // value is truly, will return a new node, of the relevant type. Sometimes, we need to check\n // first, before parsing, that's when we use `peek()`.\n //\n parsers: parsers = {\n //\n // The `primary` rule is the *entry* and *exit* point of the parser.\n // The rules here can appear at any level of the parse tree.\n //\n // The recursive nature of the grammar is an interplay between the `block`\n // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,\n // as represented by this simplified grammar:\n //\n // primary → (ruleset | declaration)+\n // ruleset → selector+ block\n // block → '{' primary '}'\n //\n // Only at one point is the primary rule not called from the\n // block rule: at the root level.\n //\n primary: function () {\n const mixin = this.mixin;\n let root = [];\n let node;\n\n while (true) {\n while (true) {\n node = this.comment();\n if (!node) { break; }\n root.push(node);\n }\n // always process comments before deciding if finished\n if (parserInput.finished) {\n break;\n }\n if (parserInput.peek('}')) {\n break;\n }\n\n node = this.extendRule();\n if (node) {\n root = root.concat(node);\n continue;\n }\n\n node = mixin.definition() || this.declaration() || this.ruleset() ||\n mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule();\n if (node) {\n root.push(node);\n } else {\n let foundSemiColon = false;\n while (parserInput.$char(';')) {\n foundSemiColon = true;\n }\n if (!foundSemiColon) {\n break;\n }\n }\n }\n\n return root;\n },\n\n // comments are collected by the main parsing mechanism and then assigned to nodes\n // where the current structure allows it\n comment: function () {\n if (parserInput.commentStore.length) {\n const comment = parserInput.commentStore.shift();\n return new(tree.Comment)(comment.text, comment.isLineComment, comment.index, fileInfo);\n }\n },\n\n //\n // Entities are tokens which can be found inside an Expression\n //\n entities: {\n mixinLookup: function() {\n return parsers.mixin.call(true, true);\n },\n //\n // A string, which supports escaping \" and '\n //\n // \"milky way\" 'he\\'s the one!'\n //\n quoted: function (forceEscaped) {\n let str;\n const index = parserInput.i;\n let isEscaped = false;\n\n parserInput.save();\n if (parserInput.$char('~')) {\n isEscaped = true;\n } else if (forceEscaped) {\n parserInput.restore();\n return;\n }\n\n str = parserInput.$quoted();\n if (!str) {\n parserInput.restore();\n return;\n }\n parserInput.forget();\n\n return new(tree.Quoted)(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo);\n },\n\n //\n // A catch-all word, such as:\n //\n // black border-collapse\n //\n keyword: function () {\n const k = parserInput.$char('%') || parserInput.$re(/^\\[?(?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\\]?/);\n if (k) {\n return tree.Color.fromKeyword(k) || new(tree.Keyword)(k);\n }\n },\n\n //\n // A function call\n //\n // rgb(255, 0, 255)\n //\n // The arguments are parsed with the `entities.arguments` parser.\n //\n call: function () {\n let name;\n let args;\n let func;\n const index = parserInput.i;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (parserInput.peek(/^url\\(/i)) {\n return;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^([\\w-]+|%|progid:[\\w\\.]+)\\(/);\n if (!name) {\n parserInput.forget(); \n return;\n }\n\n name = name[1];\n func = this.customFuncCall(name);\n if (func) {\n args = func.parse();\n if (args && func.stop) {\n parserInput.forget();\n return args;\n }\n }\n\n args = this.arguments(args);\n\n if (!parserInput.$char(')')) {\n parserInput.restore('Could not parse call arguments or missing \\')\\'');\n return;\n }\n\n parserInput.forget();\n\n return new(tree.Call)(name, args, index, fileInfo);\n },\n \n //\n // Parsing rules for functions with non-standard args, e.g.:\n //\n // boolean(not(2 > 1))\n //\n // This is a quick prototype, to be modified/improved when\n // more custom-parsed funcs come (e.g. `selector(...)`)\n //\n\n customFuncCall: function (name) {\n /* Ideally the table is to be moved out of here for faster perf.,\n but it's quite tricky since it relies on all these `parsers`\n and `expect` available only here */\n return {\n alpha: f(parsers.ieAlpha, true),\n boolean: f(condition),\n 'if': f(condition)\n }[name.toLowerCase()];\n\n function f(parse, stop) {\n return {\n parse, // parsing function\n stop // when true - stop after parse() and return its result, \n // otherwise continue for plain args\n };\n }\n \n function condition() {\n return [expect(parsers.condition, 'expected condition')];\n }\n },\n\n arguments: function (prevArgs) {\n let argsComma = prevArgs || [];\n const argsSemiColon = [];\n let isSemiColonSeparated;\n let value;\n\n parserInput.save();\n\n while (true) {\n if (prevArgs) {\n prevArgs = false;\n } else {\n value = parsers.detachedRuleset() || this.assignment() || parsers.expression();\n if (!value) {\n break;\n }\n\n if (value.value && value.value.length == 1) {\n value = value.value[0];\n }\n\n argsComma.push(value);\n }\n\n if (parserInput.$char(',')) {\n continue;\n }\n\n if (parserInput.$char(';') || isSemiColonSeparated) {\n isSemiColonSeparated = true;\n value = (argsComma.length < 1) ? argsComma[0]\n : new tree.Value(argsComma);\n argsSemiColon.push(value);\n argsComma = [];\n }\n }\n\n parserInput.forget();\n return isSemiColonSeparated ? argsSemiColon : argsComma;\n },\n literal: function () {\n return this.dimension() ||\n this.color() ||\n this.quoted() ||\n this.unicodeDescriptor();\n },\n\n // Assignments are argument entities for calls.\n // They are present in ie filter properties as shown below.\n //\n // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )\n //\n\n assignment: function () {\n let key;\n let value;\n parserInput.save();\n key = parserInput.$re(/^\\w+(?=\\s?=)/i);\n if (!key) {\n parserInput.restore();\n return;\n }\n if (!parserInput.$char('=')) {\n parserInput.restore();\n return;\n }\n value = parsers.entity();\n if (value) {\n parserInput.forget();\n return new(tree.Assignment)(key, value);\n } else {\n parserInput.restore();\n }\n },\n\n //\n // Parse url() tokens\n //\n // We use a specific rule for urls, because they don't really behave like\n // standard function calls. The difference is that the argument doesn't have\n // to be enclosed within a string, so it can't be parsed as an Expression.\n //\n url: function () {\n let value;\n const index = parserInput.i;\n\n parserInput.autoCommentAbsorb = false;\n\n if (!parserInput.$str('url(')) {\n parserInput.autoCommentAbsorb = true;\n return;\n }\n\n value = this.quoted() || this.variable() || this.property() ||\n parserInput.$re(/^(?:(?:\\\\[\\(\\)'\"])|[^\\(\\)'\"])+/) || '';\n\n parserInput.autoCommentAbsorb = true;\n\n expectChar(')');\n\n return new(tree.URL)((value.value != null || \n value instanceof tree.Variable || \n value instanceof tree.Property) ?\n value : new(tree.Anonymous)(value, index), index, fileInfo);\n },\n\n //\n // A Variable entity, such as `@fink`, in\n //\n // width: @fink + 2px\n //\n // We use a different parser for variable definitions,\n // see `parsers.variable`.\n //\n variable: function () {\n let ch;\n let name;\n const index = parserInput.i;\n\n parserInput.save();\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\\w-]+/))) {\n ch = parserInput.currentChar();\n if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\\s/)) {\n // this may be a VariableCall lookup\n const result = parsers.variableCall(name);\n if (result) {\n parserInput.forget();\n return result;\n }\n }\n parserInput.forget();\n return new(tree.Variable)(name, index, fileInfo);\n }\n parserInput.restore();\n },\n\n // A variable entity using the protective {} e.g. @{var}\n variableCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\\{([\\w-]+)\\}/))) {\n return new(tree.Variable)(`@${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Property accessor, such as `$color`, in\n //\n // background-color: $color\n //\n property: function () {\n let name;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\\$[\\w-]+/))) {\n return new(tree.Property)(name, index, fileInfo);\n }\n },\n\n // A property entity useing the protective {} e.g. ${prop}\n propertyCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\\$\\{([\\w-]+)\\}/))) {\n return new(tree.Property)(`$${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Hexadecimal color\n //\n // #4F3C2F\n //\n // `rgb` and `hsl` colors are parsed through the `entities.call` parser.\n //\n color: function () {\n let rgb;\n parserInput.save();\n\n if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\\w.#\\[])?/))) {\n if (!rgb[2]) {\n parserInput.forget();\n return new(tree.Color)(rgb[1], undefined, rgb[0]);\n } \n }\n parserInput.restore();\n },\n\n colorKeyword: function () {\n parserInput.save();\n const autoCommentAbsorb = parserInput.autoCommentAbsorb;\n parserInput.autoCommentAbsorb = false;\n const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/);\n parserInput.autoCommentAbsorb = autoCommentAbsorb;\n if (!k) {\n parserInput.forget();\n return;\n }\n parserInput.restore();\n const color = tree.Color.fromKeyword(k);\n if (color) {\n parserInput.$str(k);\n return color;\n }\n },\n\n //\n // A Dimension, that is, a number and a unit\n //\n // 0.5em 95%\n //\n dimension: function () {\n if (parserInput.peekNotNumeric()) {\n return;\n }\n\n const value = parserInput.$re(/^([+-]?\\d*\\.?\\d+)(%|[a-z_]+)?/i);\n if (value) {\n return new(tree.Dimension)(value[1], value[2]);\n }\n },\n\n //\n // A unicode descriptor, as is used in unicode-range\n //\n // U+0?? or U+00A1-00A9\n //\n unicodeDescriptor: function () {\n let ud;\n\n ud = parserInput.$re(/^U\\+[0-9a-fA-F?]+(\\-[0-9a-fA-F?]+)?/);\n if (ud) {\n return new(tree.UnicodeDescriptor)(ud[0]);\n }\n },\n\n //\n // JavaScript code to be evaluated\n //\n // `window.location.href`\n //\n javascript: function () {\n let js;\n const index = parserInput.i;\n\n parserInput.save();\n\n const escape = parserInput.$char('~');\n const jsQuote = parserInput.$char('`');\n\n if (!jsQuote) {\n parserInput.restore();\n return;\n }\n\n js = parserInput.$re(/^[^`]*`/);\n if (js) {\n parserInput.forget();\n return new(tree.JavaScript)(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo);\n }\n parserInput.restore('invalid javascript definition');\n }\n },\n\n //\n // The variable part of a variable definition. Used in the `rule` parser\n //\n // @fink:\n //\n variable: function () {\n let name;\n\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\\w-]+)\\s*:/))) { return name[1]; }\n },\n\n //\n // Call a variable value to retrieve a detached ruleset\n // or a value from a detached ruleset's rules.\n //\n // @fink();\n // @fink;\n // color: @fink[@color];\n //\n variableCall: function (parsedName) {\n let lookups;\n let important;\n const i = parserInput.i;\n const inValue = !!parsedName;\n let name = parsedName;\n\n parserInput.save();\n\n if (name || (parserInput.currentChar() === '@'\n && (name = parserInput.$re(/^(@[\\w-]+)(\\(\\s*\\))?/)))) {\n\n lookups = this.mixin.ruleLookups();\n\n if (!lookups && ((inValue && parserInput.$str('()') !== '()') || (name[2] !== '()'))) {\n parserInput.restore('Missing \\'[...]\\' lookup in variable call');\n return;\n }\n\n if (!inValue) {\n name = name[1];\n }\n\n if (lookups && parsers.important()) {\n important = true;\n }\n\n const call = new tree.VariableCall(name, i, fileInfo);\n if (!inValue && parsers.end()) {\n parserInput.forget();\n return call;\n }\n else {\n parserInput.forget();\n return new tree.NamespaceValue(call, lookups, important, i, fileInfo);\n }\n }\n\n parserInput.restore();\n },\n\n //\n // extend syntax - used to extend selectors\n //\n extend: function(isRule) {\n let elements;\n let e;\n const index = parserInput.i;\n let option;\n let extendList;\n let extend;\n\n if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) {\n return;\n }\n\n do {\n option = null;\n elements = null;\n while (!(option = parserInput.$re(/^(all)(?=\\s*(\\)|,))/))) {\n e = this.element();\n if (!e) {\n break;\n }\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n }\n\n option = option && option[1];\n if (!elements) {\n error('Missing target selector for :extend().');\n }\n extend = new(tree.Extend)(new(tree.Selector)(elements), option, index, fileInfo);\n if (extendList) {\n extendList.push(extend);\n } else {\n extendList = [ extend ];\n }\n } while (parserInput.$char(','));\n\n expect(/^\\)/);\n\n if (isRule) {\n expect(/^;/);\n }\n\n return extendList;\n },\n\n //\n // extendRule - used in a rule to extend all the parent selectors\n //\n extendRule: function() {\n return this.extend(true);\n },\n\n //\n // Mixins\n //\n mixin: {\n //\n // A Mixin call, with an optional argument list\n //\n // #mixins > .square(#fff);\n // #mixins.square(#fff);\n // .rounded(4px, black);\n // .button;\n //\n // We can lookup / return a value using the lookup syntax:\n //\n // color: #mixin.square(#fff)[@color];\n //\n // The `while` loop is there because mixins can be\n // namespaced, but we only support the child and descendant\n // selector for now.\n //\n call: function (inValue, getLookup) {\n const s = parserInput.currentChar();\n let important = false;\n let lookups;\n const index = parserInput.i;\n let elements;\n let args;\n let hasParens;\n\n if (s !== '.' && s !== '#') { return; }\n\n parserInput.save(); // stop us absorbing part of an invalid selector\n\n elements = this.elements();\n\n if (elements) {\n if (parserInput.$char('(')) {\n args = this.args(true).args;\n expectChar(')');\n hasParens = true;\n }\n\n if (getLookup !== false) {\n lookups = this.ruleLookups();\n }\n if (getLookup === true && !lookups) {\n parserInput.restore();\n return;\n }\n\n if (inValue && !lookups && !hasParens) {\n // This isn't a valid in-value mixin call\n parserInput.restore();\n return;\n }\n\n if (!inValue && parsers.important()) {\n important = true;\n }\n\n if (inValue || parsers.end()) {\n parserInput.forget();\n const mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important);\n if (lookups) {\n return new tree.NamespaceValue(mixin, lookups, important);\n }\n else {\n return mixin;\n }\n }\n }\n\n parserInput.restore();\n },\n /**\n * Matching elements for mixins\n * (Start with . or # and can have > )\n */\n elements: function() {\n let elements;\n let e;\n let c;\n let elem;\n let elemIndex;\n const re = /^[#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/;\n while (true) {\n elemIndex = parserInput.i;\n e = parserInput.$re(re);\n \n if (!e) {\n break;\n }\n elem = new(tree.Element)(c, e, false, elemIndex, fileInfo);\n if (elements) {\n elements.push(elem);\n } else {\n elements = [ elem ];\n }\n c = parserInput.$char('>');\n }\n return elements;\n },\n args: function (isCall) {\n const entities = parsers.entities;\n const returner = { args:null, variadic: false };\n let expressions = [];\n const argsSemiColon = [];\n const argsComma = [];\n let isSemiColonSeparated;\n let expressionContainsNamed;\n let name;\n let nameLoop;\n let value;\n let arg;\n let expand;\n let hasSep = true;\n\n parserInput.save();\n\n while (true) {\n if (isCall) {\n arg = parsers.detachedRuleset() || parsers.expression();\n } else {\n parserInput.commentStore.length = 0;\n if (parserInput.$str('...')) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ variadic: true });\n break;\n }\n arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true);\n }\n\n if (!arg || !hasSep) {\n break;\n }\n\n nameLoop = null;\n if (arg.throwAwayComments) {\n arg.throwAwayComments();\n }\n value = arg;\n let val = null;\n\n if (isCall) {\n // Variable\n if (arg.value && arg.value.length == 1) {\n val = arg.value[0];\n }\n } else {\n val = arg;\n }\n\n if (val && (val instanceof tree.Variable || val instanceof tree.Property)) {\n if (parserInput.$char(':')) {\n if (expressions.length > 0) {\n if (isSemiColonSeparated) {\n error('Cannot mix ; and , as delimiter types');\n }\n expressionContainsNamed = true;\n }\n\n value = parsers.detachedRuleset() || parsers.expression();\n\n if (!value) {\n if (isCall) {\n error('could not understand value for named argument');\n } else {\n parserInput.restore();\n returner.args = [];\n return returner;\n }\n }\n nameLoop = (name = val.name);\n } else if (parserInput.$str('...')) {\n if (!isCall) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ name: arg.name, variadic: true });\n break;\n } else {\n expand = true;\n }\n } else if (!isCall) {\n name = nameLoop = val.name;\n value = null;\n }\n }\n\n if (value) {\n expressions.push(value);\n }\n\n argsComma.push({ name:nameLoop, value, expand });\n\n if (parserInput.$char(',')) {\n hasSep = true;\n continue;\n }\n hasSep = parserInput.$char(';') === ';';\n\n if (hasSep || isSemiColonSeparated) {\n\n if (expressionContainsNamed) {\n error('Cannot mix ; and , as delimiter types');\n }\n\n isSemiColonSeparated = true;\n\n if (expressions.length > 1) {\n value = new(tree.Value)(expressions);\n }\n argsSemiColon.push({ name, value, expand });\n\n name = null;\n expressions = [];\n expressionContainsNamed = false;\n }\n }\n\n parserInput.forget();\n returner.args = isSemiColonSeparated ? argsSemiColon : argsComma;\n return returner;\n },\n //\n // A Mixin definition, with a list of parameters\n //\n // .rounded (@radius: 2px, @color) {\n // ...\n // }\n //\n // Until we have a finer grained state-machine, we have to\n // do a look-ahead, to make sure we don't have a mixin call.\n // See the `rule` function for more information.\n //\n // We start by matching `.rounded (`, and then proceed on to\n // the argument list, which has optional default values.\n // We store the parameters in `params`, with a `value` key,\n // if there is a value, such as in the case of `@radius`.\n //\n // Once we've got our params list, and a closing `)`, we parse\n // the `{...}` block.\n //\n definition: function () {\n let name;\n let params = [];\n let match;\n let ruleset;\n let cond;\n let variadic = false;\n if ((parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#') ||\n parserInput.peek(/^[^{]*\\}/)) {\n return;\n }\n\n parserInput.save();\n\n match = parserInput.$re(/^([#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\\s*\\(/);\n if (match) {\n name = match[1];\n\n const argInfo = this.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n\n // .mixincall(\"@{a}\");\n // looks a bit like a mixin definition..\n // also\n // .mixincall(@a: {rule: set;});\n // so we have to be nice and restore\n if (!parserInput.$char(')')) {\n parserInput.restore('Missing closing \\')\\'');\n return;\n }\n\n parserInput.commentStore.length = 0;\n\n if (parserInput.$str('when')) { // Guard\n cond = expect(parsers.conditions, 'expected condition');\n }\n\n ruleset = parsers.block();\n\n if (ruleset) {\n parserInput.forget();\n return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);\n } else {\n parserInput.restore();\n }\n } else {\n parserInput.forget();\n }\n },\n \n ruleLookups: function() {\n let rule;\n let args;\n const lookups = [];\n\n if (parserInput.currentChar() !== '[') { \n return;\n }\n\n while (true) {\n parserInput.save();\n args = null;\n rule = this.lookupValue();\n if (!rule && rule !== '') {\n parserInput.restore();\n break;\n }\n lookups.push(rule);\n parserInput.forget();\n }\n if (lookups.length > 0) {\n return lookups;\n }\n },\n \n lookupValue: function() {\n parserInput.save();\n \n if (!parserInput.$char('[')) { \n parserInput.restore();\n return;\n }\n \n const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/);\n \n if (!parserInput.$char(']')) {\n parserInput.restore();\n return;\n } \n\n if (name || name === '') {\n parserInput.forget();\n return name;\n }\n \n parserInput.restore();\n }\n },\n //\n // Entities are the smallest recognized token,\n // and can be found inside a rule's value.\n //\n entity: function () {\n const entities = this.entities;\n\n return this.comment() || entities.literal() || entities.variable() || entities.url() ||\n entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) ||\n entities.javascript();\n },\n\n //\n // A Declaration terminator. Note that we use `peek()` to check for '}',\n // because the `block` rule will be expecting it, but we still need to make sure\n // it's there, if ';' was omitted.\n //\n end: function () {\n return parserInput.$char(';') || parserInput.peek('}');\n },\n\n //\n // IE's alpha function\n //\n // alpha(opacity=88)\n //\n ieAlpha: function () {\n let value;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (!parserInput.$re(/^opacity=/i)) { return; }\n value = parserInput.$re(/^\\d+/);\n if (!value) {\n value = expect(parsers.entities.variable, 'Could not parse alpha');\n value = `@{${value.name.slice(1)}}`;\n }\n expectChar(')');\n return new tree.Quoted('', `alpha(opacity=${value})`);\n },\n\n //\n // A Selector Element\n //\n // div\n // + h1\n // #socks\n // input[type=\"text\"]\n //\n // Elements are the building blocks for Selectors,\n // they are made out of a `Combinator` (see combinator rule),\n // and an element name, such as a tag a class, or `*`.\n //\n element: function () {\n let e;\n let c;\n let v;\n const index = parserInput.i;\n\n c = this.combinator();\n\n e = parserInput.$re(/^(?:\\d+\\.\\d+|\\d+)%/) ||\n parserInput.$re(/^(?:[.#]?|:*)(?:[\\w-]|[^\\x00-\\x9f]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||\n parserInput.$char('*') || parserInput.$char('&') || this.attribute() ||\n parserInput.$re(/^\\([^&()@]+\\)/) || parserInput.$re(/^[\\.#:](?=@)/) ||\n this.entities.variableCurly();\n\n if (!e) {\n parserInput.save();\n if (parserInput.$char('(')) {\n if ((v = this.selector(false)) && parserInput.$char(')')) {\n e = new(tree.Paren)(v);\n parserInput.forget();\n } else {\n parserInput.restore('Missing closing \\')\\'');\n }\n } else {\n parserInput.forget();\n }\n }\n\n if (e) { return new(tree.Element)(c, e, e instanceof tree.Variable, index, fileInfo); }\n },\n\n //\n // Combinators combine elements together, in a Selector.\n //\n // Because our parser isn't white-space sensitive, special care\n // has to be taken, when parsing the descendant combinator, ` `,\n // as it's an empty space. We have to check the previous character\n // in the input, to see if it's a ` ` character. More info on how\n // we deal with this in *combinator.js*.\n //\n combinator: function () {\n let c = parserInput.currentChar();\n\n if (c === '/') {\n parserInput.save();\n const slashedCombinator = parserInput.$re(/^\\/[a-z]+\\//i);\n if (slashedCombinator) {\n parserInput.forget();\n return new(tree.Combinator)(slashedCombinator);\n }\n parserInput.restore();\n }\n\n if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') {\n parserInput.i++;\n if (c === '^' && parserInput.currentChar() === '^') {\n c = '^^';\n parserInput.i++;\n }\n while (parserInput.isWhitespace()) { parserInput.i++; }\n return new(tree.Combinator)(c);\n } else if (parserInput.isWhitespace(-1)) {\n return new(tree.Combinator)(' ');\n } else {\n return new(tree.Combinator)(null);\n }\n },\n //\n // A CSS Selector\n // with less extensions e.g. the ability to extend and guard\n //\n // .class > div + h1\n // li a:hover\n //\n // Selectors are made out of one or more Elements, see above.\n //\n selector: function (isLess) {\n const index = parserInput.i;\n let elements;\n let extendList;\n let c;\n let e;\n let allExtends;\n let when;\n let condition;\n isLess = isLess !== false;\n while ((isLess && (extendList = this.extend())) || (isLess && (when = parserInput.$str('when'))) || (e = this.element())) {\n if (when) {\n condition = expect(this.conditions, 'expected condition');\n } else if (condition) {\n error('CSS guard can only be used at the end of selector');\n } else if (extendList) {\n if (allExtends) {\n allExtends = allExtends.concat(extendList);\n } else {\n allExtends = extendList;\n }\n } else {\n if (allExtends) { error('Extend can only be used at the end of selector'); }\n c = parserInput.currentChar();\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n e = null;\n }\n if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') {\n break;\n }\n }\n\n if (elements) { return new(tree.Selector)(elements, allExtends, condition, index, fileInfo); }\n if (allExtends) { error('Extend must be used to extend a selector, it cannot be used on its own'); }\n },\n selectors: function () {\n let s;\n let selectors;\n while (true) {\n s = this.selector();\n if (!s) {\n break;\n }\n if (selectors) {\n selectors.push(s);\n } else {\n selectors = [ s ];\n }\n parserInput.commentStore.length = 0;\n if (s.condition && selectors.length > 1) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n if (!parserInput.$char(',')) { break; }\n if (s.condition) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n parserInput.commentStore.length = 0;\n }\n return selectors;\n },\n attribute: function () {\n if (!parserInput.$char('[')) { return; }\n\n const entities = this.entities;\n let key;\n let val;\n let op;\n\n if (!(key = entities.variableCurly())) {\n key = expect(/^(?:[_A-Za-z0-9-\\*]*\\|)?(?:[_A-Za-z0-9-]|\\\\.)+/);\n }\n\n op = parserInput.$re(/^[|~*$^]?=/);\n if (op) {\n val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\\w-]+/) || entities.variableCurly();\n }\n\n expectChar(']');\n\n return new(tree.Attribute)(key, op, val);\n },\n\n //\n // The `block` rule is used by `ruleset` and `mixin.definition`.\n // It's a wrapper around the `primary` rule, with added `{}`.\n //\n block: function () {\n let content;\n if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) {\n return content;\n }\n },\n\n blockRuleset: function() {\n let block = this.block();\n\n if (block) {\n block = new tree.Ruleset(null, block);\n }\n return block;\n },\n\n detachedRuleset: function() {\n let argInfo;\n let params;\n let variadic;\n\n parserInput.save();\n if (parserInput.$re(/^[.#]\\(/)) {\n /**\n * DR args currently only implemented for each() function, and not \n * yet settable as `@dr: #(@arg) {}`\n * This should be done when DRs are merged with mixins.\n * See: https://github.com/less/less-meta/issues/16\n */\n argInfo = this.mixin.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return;\n }\n }\n const blockRuleset = this.blockRuleset();\n if (blockRuleset) {\n parserInput.forget();\n if (params) {\n return new tree.mixin.Definition(null, params, blockRuleset, null, variadic);\n }\n return new tree.DetachedRuleset(blockRuleset);\n }\n parserInput.restore();\n },\n\n //\n // div, .class, body > p {...}\n //\n ruleset: function () {\n let selectors;\n let rules;\n let debugInfo;\n\n parserInput.save();\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(parserInput.i);\n }\n\n selectors = this.selectors();\n\n if (selectors && (rules = this.block())) {\n parserInput.forget();\n const ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports);\n if (context.dumpLineNumbers) {\n ruleset.debugInfo = debugInfo;\n }\n return ruleset;\n } else {\n parserInput.restore();\n }\n },\n declaration: function () {\n let name;\n let value;\n const index = parserInput.i;\n let hasDR;\n const c = parserInput.currentChar();\n let important;\n let merge;\n let isVariable;\n\n if (c === '.' || c === '#' || c === '&' || c === ':') { return; }\n\n parserInput.save();\n\n name = this.variable() || this.ruleProperty();\n if (name) {\n isVariable = typeof name === 'string';\n\n if (isVariable) {\n value = this.detachedRuleset();\n if (value) {\n hasDR = true;\n }\n }\n\n parserInput.commentStore.length = 0;\n if (!value) {\n // a name returned by this.ruleProperty() is always an array of the form:\n // [string-1, ..., string-n, \"\"] or [string-1, ..., string-n, \"+\"]\n // where each item is a tree.Keyword or tree.Variable\n merge = !isVariable && name.length > 1 && name.pop().value;\n\n // Custom property values get permissive parsing\n if (name[0].value && name[0].value.slice(0, 2) === '--') {\n value = this.permissiveValue();\n }\n // Try to store values as anonymous\n // If we need the value later we'll re-parse it in ruleset.parseValue\n else {\n value = this.anonymousValue();\n }\n if (value) {\n parserInput.forget();\n // anonymous values absorb the end ';' which is required for them to work\n return new (tree.Declaration)(name, value, false, merge, index, fileInfo);\n }\n\n if (!value) {\n value = this.value();\n }\n\n if (value) {\n important = this.important();\n } else if (isVariable) {\n // As a last resort, try permissiveValue\n value = this.permissiveValue();\n }\n }\n\n if (value && (this.end() || hasDR)) {\n parserInput.forget();\n return new (tree.Declaration)(name, value, important, merge, index, fileInfo);\n }\n else {\n parserInput.restore();\n }\n } else {\n parserInput.restore();\n }\n },\n anonymousValue: function () {\n const index = parserInput.i;\n const match = parserInput.$re(/^([^.#@\\$+\\/'\"*`(;{}-]*);/);\n if (match) {\n return new(tree.Anonymous)(match[1], index);\n }\n },\n /**\n * Used for custom properties, at-rules, and variables (as fallback)\n * Parses almost anything inside of {} [] () \"\" blocks\n * until it reaches outer-most tokens.\n * \n * First, it will try to parse comments and entities to reach\n * the end. This is mostly like the Expression parser except no\n * math is allowed.\n */\n permissiveValue: function (untilTokens) {\n let i;\n let e;\n let done;\n let value;\n const tok = untilTokens || ';';\n const index = parserInput.i;\n const result = [];\n\n function testCurrentChar() {\n const char = parserInput.currentChar();\n if (typeof tok === 'string') {\n return char === tok;\n } else {\n return tok.test(char);\n }\n }\n if (testCurrentChar()) {\n return;\n }\n value = [];\n do {\n e = this.comment();\n if (e) {\n value.push(e);\n continue;\n }\n e = this.entity();\n if (e) {\n value.push(e);\n }\n } while (e);\n\n done = testCurrentChar();\n\n if (value.length > 0) {\n value = new(tree.Expression)(value);\n if (done) {\n return value;\n }\n else {\n result.push(value);\n }\n // Preserve space before $parseUntil as it will not\n if (parserInput.prevChar() === ' ') {\n result.push(new tree.Anonymous(' ', index));\n }\n }\n parserInput.save();\n\n value = parserInput.$parseUntil(tok);\n\n if (value) {\n if (typeof value === 'string') {\n error(`Expected '${value}'`, 'Parse');\n }\n if (value.length === 1 && value[0] === ' ') {\n parserInput.forget();\n return new tree.Anonymous('', index);\n }\n let item;\n for (i = 0; i < value.length; i++) {\n item = value[i];\n if (Array.isArray(item)) {\n // Treat actual quotes as normal quoted values\n result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo));\n }\n else {\n if (i === value.length - 1) {\n item = item.trim();\n }\n // Treat like quoted values, but replace vars like unquoted expressions\n const quote = new tree.Quoted('\\'', item, true, index, fileInfo);\n quote.variableRegex = /@([\\w-]+)/g;\n quote.propRegex = /\\$([\\w-]+)/g;\n result.push(quote);\n }\n }\n parserInput.forget();\n return new tree.Expression(result, true);\n }\n parserInput.restore();\n },\n\n //\n // An @import atrule\n //\n // @import \"lib\";\n //\n // Depending on our environment, importing is done differently:\n // In the browser, it's an XHR request, in Node, it would be a\n // file-system operation. The function used for importing is\n // stored in `import`, which we pass to the Import constructor.\n //\n 'import': function () {\n let path;\n let features;\n const index = parserInput.i;\n\n const dir = parserInput.$re(/^@import?\\s+/);\n\n if (dir) {\n const options = (dir ? this.importOptions() : null) || {};\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n features = this.mediaFeatures();\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon or unrecognised media features on import');\n }\n features = features && new(tree.Value)(features);\n return new(tree.Import)(path, features, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed import statement');\n }\n }\n },\n\n importOptions: function() {\n let o;\n const options = {};\n let optionName;\n let value;\n\n // list of options, surrounded by parens\n if (!parserInput.$char('(')) { return null; }\n do {\n o = this.importOption();\n if (o) {\n optionName = o;\n value = true;\n switch (optionName) {\n case 'css':\n optionName = 'less';\n value = false;\n break;\n case 'once':\n optionName = 'multiple';\n value = false;\n break;\n }\n options[optionName] = value;\n if (!parserInput.$char(',')) { break; }\n }\n } while (o);\n expectChar(')');\n return options;\n },\n\n importOption: function() {\n const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/);\n if (opt) {\n return opt[1];\n }\n },\n\n mediaFeature: function () {\n const entities = this.entities;\n const nodes = [];\n let e;\n let p;\n parserInput.save();\n do {\n e = entities.keyword() || entities.variable() || entities.mixinLookup();\n if (e) {\n nodes.push(e);\n } else if (parserInput.$char('(')) {\n p = this.property();\n e = this.value();\n if (parserInput.$char(')')) {\n if (p && e) {\n nodes.push(new(tree.Paren)(new(tree.Declaration)(p, e, null, null, parserInput.i, fileInfo, true)));\n } else if (e) {\n nodes.push(new(tree.Paren)(e));\n } else {\n error('badly formed media feature definition');\n }\n } else {\n error('Missing closing \\')\\'', 'Parse');\n }\n }\n } while (e);\n\n parserInput.forget();\n if (nodes.length > 0) {\n return new(tree.Expression)(nodes);\n }\n },\n\n mediaFeatures: function () {\n const entities = this.entities;\n const features = [];\n let e;\n do {\n e = this.mediaFeature();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n } else {\n e = entities.variable() || entities.mixinLookup();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n }\n } while (e);\n\n return features.length > 0 ? features : null;\n },\n\n media: function () {\n let features;\n let rules;\n let media;\n let debugInfo;\n const index = parserInput.i;\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(index);\n }\n\n parserInput.save();\n\n if (parserInput.$str('@media')) {\n features = this.mediaFeatures();\n\n rules = this.block();\n\n if (!rules) {\n error('media definitions require block statements after any features');\n }\n\n parserInput.forget();\n\n media = new(tree.Media)(rules, features, index, fileInfo);\n if (context.dumpLineNumbers) {\n media.debugInfo = debugInfo;\n }\n\n return media;\n }\n\n parserInput.restore();\n },\n\n //\n\n // A @plugin directive, used to import plugins dynamically.\n //\n // @plugin (args) \"lib\";\n //\n plugin: function () {\n let path;\n let args;\n let options;\n const index = parserInput.i;\n const dir = parserInput.$re(/^@plugin?\\s+/);\n\n if (dir) {\n args = this.pluginArgs();\n\n if (args) {\n options = {\n pluginArgs: args,\n isPlugin: true\n };\n }\n else {\n options = { isPlugin: true };\n }\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon on @plugin');\n }\n return new(tree.Import)(path, null, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed @plugin statement');\n }\n }\n },\n\n pluginArgs: function() {\n // list of options, surrounded by parens\n parserInput.save();\n if (!parserInput.$char('(')) {\n parserInput.restore();\n return null;\n }\n const args = parserInput.$re(/^\\s*([^\\);]+)\\)\\s*/);\n if (args[1]) {\n parserInput.forget();\n return args[1].trim();\n }\n else { \n parserInput.restore();\n return null;\n }\n },\n\n //\n // A CSS AtRule\n //\n // @charset \"utf-8\";\n //\n atrule: function () {\n const index = parserInput.i;\n let name;\n let value;\n let rules;\n let nonVendorSpecificName;\n let hasIdentifier;\n let hasExpression;\n let hasUnknown;\n let hasBlock = true;\n let isRooted = true;\n\n if (parserInput.currentChar() !== '@') { return; }\n\n value = this['import']() || this.plugin() || this.media();\n if (value) {\n return value;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^@[a-z-]+/);\n\n if (!name) { return; }\n\n nonVendorSpecificName = name;\n if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {\n nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`;\n }\n\n switch (nonVendorSpecificName) {\n case '@charset':\n hasIdentifier = true;\n hasBlock = false;\n break;\n case '@namespace':\n hasExpression = true;\n hasBlock = false;\n break;\n case '@keyframes':\n case '@counter-style':\n hasIdentifier = true;\n break;\n case '@document':\n case '@supports':\n hasUnknown = true;\n isRooted = false;\n break;\n default:\n hasUnknown = true;\n break;\n }\n\n parserInput.commentStore.length = 0;\n\n if (hasIdentifier) {\n value = this.entity();\n if (!value) {\n error(`expected ${name} identifier`);\n }\n } else if (hasExpression) {\n value = this.expression();\n if (!value) {\n error(`expected ${name} expression`);\n }\n } else if (hasUnknown) {\n value = this.permissiveValue(/^[{;]/);\n hasBlock = (parserInput.currentChar() === '{');\n if (!value) {\n if (!hasBlock && parserInput.currentChar() !== ';') {\n error(`${name} rule is missing block or ending semi-colon`);\n }\n }\n else if (!value.value) {\n value = null;\n }\n }\n\n if (hasBlock) {\n rules = this.blockRuleset();\n }\n\n if (rules || (!hasBlock && value && parserInput.$char(';'))) {\n parserInput.forget();\n return new (tree.AtRule)(name, value, rules, index, fileInfo,\n context.dumpLineNumbers ? getDebugInfo(index) : null,\n isRooted\n );\n }\n\n parserInput.restore('at-rule options not recognised');\n },\n\n //\n // A Value is a comma-delimited list of Expressions\n //\n // font-family: Baskerville, Georgia, serif;\n //\n // In a Rule, a Value represents everything after the `:`,\n // and before the `;`.\n //\n value: function () {\n let e;\n const expressions = [];\n const index = parserInput.i;\n\n do {\n e = this.expression();\n if (e) {\n expressions.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n } while (e);\n\n if (expressions.length > 0) {\n return new(tree.Value)(expressions, index);\n }\n },\n important: function () {\n if (parserInput.currentChar() === '!') {\n return parserInput.$re(/^! *important/);\n }\n },\n sub: function () {\n let a;\n let e;\n\n parserInput.save();\n if (parserInput.$char('(')) {\n a = this.addition();\n if (a && parserInput.$char(')')) {\n parserInput.forget();\n e = new(tree.Expression)([a]);\n e.parens = true;\n return e;\n }\n parserInput.restore('Expected \\')\\'');\n return;\n }\n parserInput.restore();\n },\n multiplication: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.operand();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n if (parserInput.peek(/^\\/[*\\/]/)) {\n break;\n }\n\n parserInput.save();\n\n op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./');\n\n if (!op) { parserInput.forget(); break; }\n\n a = this.operand();\n\n if (!a) { parserInput.restore(); break; }\n parserInput.forget();\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n addition: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.multiplication();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n op = parserInput.$re(/^[-+]\\s+/) || (!isSpaced && (parserInput.$char('+') || parserInput.$char('-')));\n if (!op) {\n break;\n }\n a = this.multiplication();\n if (!a) {\n break;\n }\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n conditions: function () {\n let a;\n let b;\n const index = parserInput.i;\n let condition;\n\n a = this.condition(true);\n if (a) {\n while (true) {\n if (!parserInput.peek(/^,\\s*(not\\s*)?\\(/) || !parserInput.$char(',')) {\n break;\n }\n b = this.condition(true);\n if (!b) {\n break;\n }\n condition = new(tree.Condition)('or', condition || a, b, index);\n }\n return condition || a;\n }\n },\n condition: function (needsParens) {\n let result;\n let logical;\n let next;\n function or() {\n return parserInput.$str('or');\n }\n\n result = this.conditionAnd(needsParens);\n if (!result) {\n return ;\n }\n logical = or();\n if (logical) {\n next = this.condition(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n conditionAnd: function (needsParens) {\n let result;\n let logical;\n let next;\n const self = this;\n function insideCondition() {\n const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens);\n if (!cond && !needsParens) {\n return self.atomicCondition(needsParens);\n }\n return cond;\n }\n function and() {\n return parserInput.$str('and');\n }\n\n result = insideCondition();\n if (!result) {\n return ;\n }\n logical = and();\n if (logical) {\n next = this.conditionAnd(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n negatedCondition: function (needsParens) {\n if (parserInput.$str('not')) {\n const result = this.parenthesisCondition(needsParens);\n if (result) {\n result.negate = !result.negate;\n }\n return result;\n }\n },\n parenthesisCondition: function (needsParens) {\n function tryConditionFollowedByParenthesis(me) {\n let body;\n parserInput.save();\n body = me.condition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return ;\n }\n parserInput.forget();\n return body;\n }\n\n let body;\n parserInput.save();\n if (!parserInput.$str('(')) {\n parserInput.restore();\n return ;\n }\n body = tryConditionFollowedByParenthesis(this);\n if (body) {\n parserInput.forget();\n return body;\n }\n\n body = this.atomicCondition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`);\n return ;\n }\n parserInput.forget();\n return body;\n },\n atomicCondition: function (needsParens) {\n const entities = this.entities;\n const index = parserInput.i;\n let a;\n let b;\n let c;\n let op;\n\n function cond() {\n return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup();\n }\n cond = cond.bind(this);\n\n a = cond();\n if (a) {\n if (parserInput.$char('>')) {\n if (parserInput.$char('=')) {\n op = '>=';\n } else {\n op = '>';\n }\n } else\n if (parserInput.$char('<')) {\n if (parserInput.$char('=')) {\n op = '<=';\n } else {\n op = '<';\n }\n } else\n if (parserInput.$char('=')) {\n if (parserInput.$char('>')) {\n op = '=>';\n } else if (parserInput.$char('<')) {\n op = '=<';\n } else {\n op = '=';\n }\n }\n if (op) {\n b = cond();\n if (b) {\n c = new(tree.Condition)(op, a, b, index, false);\n } else {\n error('expected expression');\n }\n } else {\n c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, false);\n }\n return c;\n }\n },\n\n //\n // An operand is anything that can be part of an operation,\n // such as a Color, or a Variable\n //\n operand: function () {\n const entities = this.entities;\n let negate;\n\n if (parserInput.peek(/^-[@\\$\\(]/)) {\n negate = parserInput.$char('-');\n }\n\n let o = this.sub() || entities.dimension() ||\n entities.color() || entities.variable() ||\n entities.property() || entities.call() ||\n entities.quoted(true) || entities.colorKeyword() ||\n entities.mixinLookup();\n\n if (negate) {\n o.parensInOp = true;\n o = new(tree.Negative)(o);\n }\n\n return o;\n },\n\n //\n // Expressions either represent mathematical operations,\n // or white-space delimited Entities.\n //\n // 1px solid black\n // @var * 2\n //\n expression: function () {\n const entities = [];\n let e;\n let delim;\n const index = parserInput.i;\n\n do {\n e = this.comment();\n if (e) {\n entities.push(e);\n continue;\n }\n e = this.addition() || this.entity();\n if (e) {\n entities.push(e);\n // operations do not allow keyword \"/\" dimension (e.g. small/20px) so we support that here\n if (!parserInput.peek(/^\\/[\\/*]/)) {\n delim = parserInput.$char('/');\n if (delim) {\n entities.push(new(tree.Anonymous)(delim, index));\n }\n }\n }\n } while (e);\n if (entities.length > 0) {\n return new(tree.Expression)(entities);\n }\n },\n property: function () {\n const name = parserInput.$re(/^(\\*?-?[_a-zA-Z0-9-]+)\\s*:/);\n if (name) {\n return name[1];\n }\n },\n ruleProperty: function () {\n let name = [];\n const index = [];\n let s;\n let k;\n\n parserInput.save();\n\n const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\\s*:/);\n if (simpleProperty) {\n name = [new(tree.Keyword)(simpleProperty[1])];\n parserInput.forget();\n return name;\n }\n\n function match(re) {\n const i = parserInput.i;\n const chunk = parserInput.$re(re);\n if (chunk) {\n index.push(i);\n return name.push(chunk[1]);\n }\n }\n\n match(/^(\\*?)/);\n while (true) {\n if (!match(/^((?:[\\w-]+)|(?:[@\\$]\\{[\\w-]+\\}))/)) {\n break;\n }\n }\n\n if ((name.length > 1) && match(/^((?:\\+_|\\+)?)\\s*:/)) {\n parserInput.forget();\n\n // at last, we have the complete match now. move forward,\n // convert name particles to tree objects and return:\n if (name[0] === '') {\n name.shift();\n index.shift();\n }\n for (k = 0; k < name.length; k++) {\n s = name[k];\n name[k] = (s.charAt(0) !== '@' && s.charAt(0) !== '$') ?\n new(tree.Keyword)(s) :\n (s.charAt(0) === '@' ?\n new(tree.Variable)(`@${s.slice(2, -1)}`, index[k], fileInfo) :\n new(tree.Property)(`$${s.slice(2, -1)}`, index[k], fileInfo));\n }\n return name;\n }\n parserInput.restore();\n }\n }\n };\n};\nParser.serializeVars = vars => {\n let s = '';\n\n for (const name in vars) {\n if (Object.hasOwnProperty.call(vars, name)) {\n const value = vars[name];\n s += `${((name[0] === '@') ? '' : '@') + name}: ${value}${(String(value).slice(-1) === ';') ? '' : ';'}`;\n }\n }\n\n return s;\n};\n\nexport default Parser;\n","import Anonymous from '../tree/anonymous';\nimport Keyword from '../tree/keyword';\n\nfunction boolean(condition) {\n return condition ? Keyword.True : Keyword.False;\n}\n\nfunction If(condition, trueValue, falseValue) {\n return condition ? trueValue\n : (falseValue || new Anonymous);\n}\n\nexport default { boolean, 'if': If };\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nlet colorFunctions;\n\nfunction clamp(val) {\n return Math.min(1, Math.max(0, val));\n}\nfunction hsla(origColor, hsl) {\n const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a);\n if (color) {\n if (origColor.value && \n /^(rgb|hsl)/.test(origColor.value)) {\n color.value = origColor.value;\n } else {\n color.value = 'rgb';\n }\n return color;\n }\n}\nfunction toHSL(color) {\n if (color.toHSL) {\n return color.toHSL();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction toHSV(color) {\n if (color.toHSV) {\n return color.toHSV();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction number(n) {\n if (n instanceof Dimension) {\n return parseFloat(n.unit.is('%') ? n.value / 100 : n.value);\n } else if (typeof n === 'number') {\n return n;\n } else {\n throw {\n type: 'Argument',\n message: 'color functions take numbers as parameters'\n };\n }\n}\nfunction scaled(n, size) {\n if (n instanceof Dimension && n.unit.is('%')) {\n return parseFloat(n.value * size / 100);\n } else {\n return number(n);\n }\n}\ncolorFunctions = {\n rgb: function (r, g, b) {\n const color = colorFunctions.rgba(r, g, b, 1.0);\n if (color) {\n color.value = 'rgb';\n return color;\n }\n },\n rgba: function (r, g, b, a) {\n try {\n if (r instanceof Color) {\n if (g) {\n a = number(g);\n } else {\n a = r.alpha;\n }\n return new Color(r.rgb, a, 'rgba');\n }\n const rgb = [r, g, b].map(c => scaled(c, 255));\n a = number(a);\n return new Color(rgb, a, 'rgba');\n }\n catch (e) {}\n },\n hsl: function (h, s, l) {\n const color = colorFunctions.hsla(h, s, l, 1.0);\n if (color) {\n color.value = 'hsl';\n return color;\n }\n },\n hsla: function (h, s, l, a) {\n try {\n if (h instanceof Color) {\n if (s) {\n a = number(s);\n } else {\n a = h.alpha;\n }\n return new Color(h.rgb, a, 'hsla');\n }\n\n let m1;\n let m2;\n\n function hue(h) {\n h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);\n if (h * 6 < 1) {\n return m1 + (m2 - m1) * h * 6;\n }\n else if (h * 2 < 1) {\n return m2;\n }\n else if (h * 3 < 2) {\n return m1 + (m2 - m1) * (2 / 3 - h) * 6;\n }\n else {\n return m1;\n }\n }\n\n h = (number(h) % 360) / 360;\n s = clamp(number(s));l = clamp(number(l));a = clamp(number(a));\n\n m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;\n m1 = l * 2 - m2;\n\n const rgb = [\n hue(h + 1 / 3) * 255,\n hue(h) * 255,\n hue(h - 1 / 3) * 255\n ];\n a = number(a);\n return new Color(rgb, a, 'hsla');\n }\n catch (e) {}\n },\n\n hsv: function(h, s, v) {\n return colorFunctions.hsva(h, s, v, 1.0);\n },\n\n hsva: function(h, s, v, a) {\n h = ((number(h) % 360) / 360) * 360;\n s = number(s);v = number(v);a = number(a);\n\n let i;\n let f;\n i = Math.floor((h / 60) % 6);\n f = (h / 60) - i;\n\n const vs = [v,\n v * (1 - s),\n v * (1 - f * s),\n v * (1 - (1 - f) * s)];\n const perm = [[0, 3, 1],\n [2, 0, 1],\n [1, 0, 3],\n [1, 2, 0],\n [3, 1, 0],\n [0, 1, 2]];\n\n return colorFunctions.rgba(vs[perm[i][0]] * 255,\n vs[perm[i][1]] * 255,\n vs[perm[i][2]] * 255,\n a);\n },\n\n hue: function (color) {\n return new Dimension(toHSL(color).h);\n },\n saturation: function (color) {\n return new Dimension(toHSL(color).s * 100, '%');\n },\n lightness: function (color) {\n return new Dimension(toHSL(color).l * 100, '%');\n },\n hsvhue: function(color) {\n return new Dimension(toHSV(color).h);\n },\n hsvsaturation: function (color) {\n return new Dimension(toHSV(color).s * 100, '%');\n },\n hsvvalue: function (color) {\n return new Dimension(toHSV(color).v * 100, '%');\n },\n red: function (color) {\n return new Dimension(color.rgb[0]);\n },\n green: function (color) {\n return new Dimension(color.rgb[1]);\n },\n blue: function (color) {\n return new Dimension(color.rgb[2]);\n },\n alpha: function (color) {\n return new Dimension(toHSL(color).a);\n },\n luma: function (color) {\n return new Dimension(color.luma() * color.alpha * 100, '%');\n },\n luminance: function (color) {\n const luminance =\n (0.2126 * color.rgb[0] / 255) +\n (0.7152 * color.rgb[1] / 255) +\n (0.0722 * color.rgb[2] / 255);\n\n return new Dimension(luminance * color.alpha * 100, '%');\n },\n saturate: function (color, amount, method) {\n // filter: saturate(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s += hsl.s * amount.value / 100;\n }\n else {\n hsl.s += amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n desaturate: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s -= hsl.s * amount.value / 100;\n }\n else {\n hsl.s -= amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n lighten: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l += hsl.l * amount.value / 100;\n }\n else {\n hsl.l += amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n darken: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l -= hsl.l * amount.value / 100;\n }\n else {\n hsl.l -= amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n fadein: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a += hsl.a * amount.value / 100;\n }\n else {\n hsl.a += amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fadeout: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a -= hsl.a * amount.value / 100;\n }\n else {\n hsl.a -= amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fade: function (color, amount) {\n const hsl = toHSL(color);\n\n hsl.a = amount.value / 100;\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n spin: function (color, amount) {\n const hsl = toHSL(color);\n const hue = (hsl.h + amount.value) % 360;\n\n hsl.h = hue < 0 ? 360 + hue : hue;\n\n return hsla(color, hsl);\n },\n //\n // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein\n // http://sass-lang.com\n //\n mix: function (color1, color2, weight) {\n if (!weight) {\n weight = new Dimension(50);\n }\n const p = weight.value / 100.0;\n const w = p * 2 - 1;\n const a = toHSL(color1).a - toHSL(color2).a;\n\n const w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;\n const w2 = 1 - w1;\n\n const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,\n color1.rgb[1] * w1 + color2.rgb[1] * w2,\n color1.rgb[2] * w1 + color2.rgb[2] * w2];\n\n const alpha = color1.alpha * p + color2.alpha * (1 - p);\n\n return new Color(rgb, alpha);\n },\n greyscale: function (color) {\n return colorFunctions.desaturate(color, new Dimension(100));\n },\n contrast: function (color, dark, light, threshold) {\n // filter: contrast(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n if (typeof light === 'undefined') {\n light = colorFunctions.rgba(255, 255, 255, 1.0);\n }\n if (typeof dark === 'undefined') {\n dark = colorFunctions.rgba(0, 0, 0, 1.0);\n }\n // Figure out which is actually light and dark:\n if (dark.luma() > light.luma()) {\n const t = light;\n light = dark;\n dark = t;\n }\n if (typeof threshold === 'undefined') {\n threshold = 0.43;\n } else {\n threshold = number(threshold);\n }\n if (color.luma() < threshold) {\n return light;\n } else {\n return dark;\n }\n },\n // Changes made in 2.7.0 - Reverted in 3.0.0\n // contrast: function (color, color1, color2, threshold) {\n // // Return which of `color1` and `color2` has the greatest contrast with `color`\n // // according to the standard WCAG contrast ratio calculation.\n // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef\n // // The threshold param is no longer used, in line with SASS.\n // // filter: contrast(3.2);\n // // should be kept as is, so check for color\n // if (!color.rgb) {\n // return null;\n // }\n // if (typeof color1 === 'undefined') {\n // color1 = colorFunctions.rgba(0, 0, 0, 1.0);\n // }\n // if (typeof color2 === 'undefined') {\n // color2 = colorFunctions.rgba(255, 255, 255, 1.0);\n // }\n // var contrast1, contrast2;\n // var luma = color.luma();\n // var luma1 = color1.luma();\n // var luma2 = color2.luma();\n // // Calculate contrast ratios for each color\n // if (luma > luma1) {\n // contrast1 = (luma + 0.05) / (luma1 + 0.05);\n // } else {\n // contrast1 = (luma1 + 0.05) / (luma + 0.05);\n // }\n // if (luma > luma2) {\n // contrast2 = (luma + 0.05) / (luma2 + 0.05);\n // } else {\n // contrast2 = (luma2 + 0.05) / (luma + 0.05);\n // }\n // if (contrast1 > contrast2) {\n // return color1;\n // } else {\n // return color2;\n // }\n // },\n argb: function (color) {\n return new Anonymous(color.toARGB());\n },\n color: function(c) {\n if ((c instanceof Quoted) &&\n (/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value))) {\n const val = c.value.slice(1);\n return new Color(val, undefined, `#${val}`);\n }\n if ((c instanceof Color) || (c = Color.fromKeyword(c.value))) {\n c.value = undefined;\n return c;\n }\n throw {\n type: 'Argument',\n message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF'\n };\n },\n tint: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount);\n },\n shade: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount);\n }\n};\n\nexport default colorFunctions;\n","import Color from '../tree/color';\n\n// Color Blending\n// ref: http://www.w3.org/TR/compositing-1\n\nfunction colorBlend(mode, color1, color2) {\n const ab = color1.alpha; // result\n\n let // backdrop\n cb;\n\n const as = color2.alpha;\n\n let // source\n cs;\n\n let ar;\n let cr;\n const r = [];\n\n ar = as + ab * (1 - as);\n for (let i = 0; i < 3; i++) {\n cb = color1.rgb[i] / 255;\n cs = color2.rgb[i] / 255;\n cr = mode(cb, cs);\n if (ar) {\n cr = (as * cs + ab * (cb -\n as * (cb + cs - cr))) / ar;\n }\n r[i] = cr * 255;\n }\n\n return new Color(r, ar);\n}\n\nconst colorBlendModeFunctions = {\n multiply: function(cb, cs) {\n return cb * cs;\n },\n screen: function(cb, cs) {\n return cb + cs - cb * cs;\n },\n overlay: function(cb, cs) {\n cb *= 2;\n return (cb <= 1) ?\n colorBlendModeFunctions.multiply(cb, cs) :\n colorBlendModeFunctions.screen(cb - 1, cs);\n },\n softlight: function(cb, cs) {\n let d = 1;\n let e = cb;\n if (cs > 0.5) {\n e = 1;\n d = (cb > 0.25) ? Math.sqrt(cb)\n : ((16 * cb - 12) * cb + 4) * cb;\n }\n return cb - (1 - 2 * cs) * e * (d - cb);\n },\n hardlight: function(cb, cs) {\n return colorBlendModeFunctions.overlay(cs, cb);\n },\n difference: function(cb, cs) {\n return Math.abs(cb - cs);\n },\n exclusion: function(cb, cs) {\n return cb + cs - 2 * cb * cs;\n },\n\n // non-w3c functions:\n average: function(cb, cs) {\n return (cb + cs) / 2;\n },\n negation: function(cb, cs) {\n return 1 - Math.abs(cb + cs - 1);\n }\n};\n\nfor (const f in colorBlendModeFunctions) {\n if (colorBlendModeFunctions.hasOwnProperty(f)) {\n colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]);\n }\n}\n\nexport default colorBlend;\n","import Quoted from '../tree/quoted';\nimport URL from '../tree/url';\nimport * as utils from '../utils';\nimport logger from '../logger';\n\nexport default environment => {\n \n const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); \n\n return { 'data-uri': function(mimetypeNode, filePathNode) {\n\n if (!filePathNode) {\n filePathNode = mimetypeNode;\n mimetypeNode = null;\n }\n\n let mimetype = mimetypeNode && mimetypeNode.value;\n let filePath = filePathNode.value;\n const currentFileInfo = this.currentFileInfo;\n const currentDirectory = currentFileInfo.rewriteUrls ?\n currentFileInfo.currentDirectory : currentFileInfo.entryPath;\n\n const fragmentStart = filePath.indexOf('#');\n let fragment = '';\n if (fragmentStart !== -1) {\n fragment = filePath.slice(fragmentStart);\n filePath = filePath.slice(0, fragmentStart);\n }\n const context = utils.clone(this.context);\n context.rawBuffer = true;\n\n const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true);\n\n if (!fileManager) {\n return fallback(this, filePathNode);\n }\n\n let useBase64 = false;\n\n // detect the mimetype if not given\n if (!mimetypeNode) {\n\n mimetype = environment.mimeLookup(filePath);\n\n if (mimetype === 'image/svg+xml') {\n useBase64 = false;\n } else {\n // use base 64 unless it's an ASCII or UTF-8 format\n const charset = environment.charsetLookup(mimetype);\n useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0;\n }\n if (useBase64) { mimetype += ';base64'; }\n }\n else {\n useBase64 = /;base64$/.test(mimetype);\n }\n\n const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment);\n if (!fileSync.contents) {\n logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`);\n return fallback(this, filePathNode || mimetypeNode);\n }\n let buf = fileSync.contents;\n if (useBase64 && !environment.encodeBase64) {\n return fallback(this, filePathNode);\n }\n\n buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf);\n\n const uri = `data:${mimetype},${buf}${fragment}`;\n\n return new URL(new Quoted(`\"${uri}\"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import Comment from '../tree/comment';\nimport Dimension from '../tree/dimension';\nimport Declaration from '../tree/declaration';\nimport Expression from '../tree/expression';\nimport Ruleset from '../tree/ruleset';\nimport Selector from '../tree/selector';\nimport Element from '../tree/element';\nimport Quote from '../tree/quoted';\n\nconst getItemsFromNode = node => {\n // handle non-array values as an array of length 1\n // return 'undefined' if index is invalid\n const items = Array.isArray(node.value) ?\n node.value : Array(node);\n\n return items;\n};\n\nexport default {\n _SELF: function(n) {\n return n;\n },\n extract: function(values, index) {\n index = index.value - 1; // (1-based index)\n\n return getItemsFromNode(values)[index];\n },\n length: function(values) {\n return new Dimension(getItemsFromNode(values).length);\n },\n /**\n * Creates a Less list of incremental values.\n * Modeled after Lodash's range function, also exists natively in PHP\n * \n * @param {Dimension} [start=1]\n * @param {Dimension} end - e.g. 10 or 10px - unit is added to output\n * @param {Dimension} [step=1] \n */\n range: function(start, end, step) {\n let from;\n let to;\n let stepValue = 1;\n const list = [];\n if (end) {\n to = end;\n from = start.value;\n if (step) {\n stepValue = step.value;\n }\n }\n else {\n from = 1;\n to = start;\n }\n\n for (let i = from; i <= to.value; i += stepValue) {\n list.push(new Dimension(i, to.unit));\n }\n\n return new Expression(list);\n },\n each: function(list, rs) {\n const rules = [];\n let newRules;\n let iterator;\n\n if (list.value && !(list instanceof Quote)) {\n if (Array.isArray(list.value)) {\n iterator = list.value;\n } else {\n iterator = [list.value];\n }\n } else if (list.ruleset) {\n iterator = list.ruleset.rules;\n } else if (list.rules) {\n iterator = list.rules;\n } else if (Array.isArray(list)) {\n iterator = list;\n } else {\n iterator = [list];\n }\n\n let valueName = '@value';\n let keyName = '@key';\n let indexName = '@index';\n\n if (rs.params) {\n valueName = rs.params[0] && rs.params[0].name;\n keyName = rs.params[1] && rs.params[1].name;\n indexName = rs.params[2] && rs.params[2].name;\n rs = rs.rules;\n } else {\n rs = rs.ruleset;\n }\n\n for (let i = 0; i < iterator.length; i++) {\n let key;\n let value;\n const item = iterator[i];\n if (item instanceof Declaration) {\n key = typeof item.name === 'string' ? item.name : item.name[0].value;\n value = item.value;\n } else {\n key = new Dimension(i + 1);\n value = item;\n }\n\n if (item instanceof Comment) {\n continue;\n }\n\n newRules = rs.rules.slice(0);\n if (valueName) {\n newRules.push(new Declaration(valueName,\n value,\n false, false, this.index, this.currentFileInfo));\n }\n if (indexName) {\n newRules.push(new Declaration(indexName,\n new Dimension(i + 1),\n false, false, this.index, this.currentFileInfo));\n }\n if (keyName) {\n newRules.push(new Declaration(keyName,\n key,\n false, false, this.index, this.currentFileInfo));\n }\n\n rules.push(new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n newRules,\n rs.strictImports,\n rs.visibilityInfo()\n ));\n }\n\n return new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n rules,\n rs.strictImports,\n rs.visibilityInfo()\n ).eval(this.context);\n }\n};\n","import Dimension from '../tree/dimension';\n\nconst MathHelper = (fn, unit, n) => {\n if (!(n instanceof Dimension)) {\n throw { type: 'Argument', message: 'argument must be a number' };\n }\n if (unit == null) {\n unit = n.unit;\n } else {\n n = n.unify();\n }\n return new Dimension(fn(parseFloat(n.value)), unit);\n};\n\nexport default MathHelper;","import mathHelper from './math-helper.js';\n\nconst mathFunctions = {\n // name, unit\n ceil: null,\n floor: null,\n sqrt: null,\n abs: null,\n tan: '',\n sin: '',\n cos: '',\n atan: 'rad',\n asin: 'rad',\n acos: 'rad'\n};\n\nfor (const f in mathFunctions) {\n if (mathFunctions.hasOwnProperty(f)) {\n mathFunctions[f] = mathHelper.bind(null, Math[f], mathFunctions[f]);\n }\n}\n\nmathFunctions.round = (n, f) => {\n const fraction = typeof f === 'undefined' ? 0 : f.value;\n return mathHelper(num => num.toFixed(fraction), null, n);\n};\n\nexport default mathFunctions;\n","import Dimension from '../tree/dimension';\nimport Anonymous from '../tree/anonymous';\nimport mathHelper from './math-helper.js';\n\nconst minMax = function (isMin, args) {\n args = Array.prototype.slice.call(args);\n switch (args.length) {\n case 0: throw { type: 'Argument', message: 'one or more arguments required' };\n }\n let i; // key is the unit.toString() for unified Dimension values,\n let j;\n let current;\n let currentUnified;\n let referenceUnified;\n let unit;\n let unitStatic;\n let unitClone;\n\n const // elems only contains original argument values.\n order = [];\n\n const values = {};\n // value is the index into the order array.\n for (i = 0; i < args.length; i++) {\n current = args[i];\n if (!(current instanceof Dimension)) {\n if (Array.isArray(args[i].value)) {\n Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value));\n }\n continue;\n }\n currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify();\n unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString();\n unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic;\n unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone;\n j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit];\n if (j === undefined) {\n if (unitStatic !== undefined && unit !== unitStatic) {\n throw { type: 'Argument', message: 'incompatible types' };\n }\n values[unit] = order.length;\n order.push(current);\n continue;\n }\n referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify();\n if ( isMin && currentUnified.value < referenceUnified.value ||\n !isMin && currentUnified.value > referenceUnified.value) {\n order[j] = current;\n }\n }\n if (order.length == 1) {\n return order[0];\n }\n args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', ');\n return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`);\n};\n\nexport default {\n min: function(...args) {\n return minMax(true, args);\n },\n max: function(...args) {\n return minMax(false, args);\n },\n convert: function (val, unit) {\n return val.convertTo(unit.value);\n },\n pi: function () {\n return new Dimension(Math.PI);\n },\n mod: function(a, b) {\n return new Dimension(a.value % b.value, a.unit);\n },\n pow: function(x, y) {\n if (typeof x === 'number' && typeof y === 'number') {\n x = new Dimension(x);\n y = new Dimension(y);\n } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) {\n throw { type: 'Argument', message: 'arguments must be numbers' };\n }\n\n return new Dimension(Math.pow(x.value, y.value), x.unit);\n },\n percentage: function (n) {\n const result = mathHelper(num => num * 100, '%', n);\n\n return result;\n }\n};\n","import Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport Quote from '../tree/quoted';\nimport JavaScript from '../tree/javascript';\n\nexport default {\n e: function (str) {\n return new Quote('\"', str instanceof JavaScript ? str.evaluated : str.value, true);\n },\n escape: function (str) {\n return new Anonymous(\n encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B')\n .replace(/\\(/g, '%28').replace(/\\)/g, '%29'));\n },\n replace: function (string, pattern, replacement, flags) {\n let result = string.value;\n replacement = (replacement.type === 'Quoted') ?\n replacement.value : replacement.toCSS();\n result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement);\n return new Quoted(string.quote || '', result, string.escaped);\n },\n '%': function (string /* arg, arg, ... */) {\n const args = Array.prototype.slice.call(arguments, 1);\n let result = string.value;\n\n for (let i = 0; i < args.length; i++) {\n /* jshint loopfunc:true */\n result = result.replace(/%[sda]/i, token => {\n const value = ((args[i].type === 'Quoted') &&\n token.match(/s/i)) ? args[i].value : args[i].toCSS();\n return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;\n });\n }\n result = result.replace(/%%/g, '%');\n return new Quoted(string.quote || '', result, string.escaped);\n }\n};\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Expression from '../tree/expression';\nimport Quoted from '../tree/quoted';\nimport URL from '../tree/url';\n\nexport default environment => {\n return { 'svg-gradient': function(direction) {\n let stops;\n let gradientDirectionSvg;\n let gradientType = 'linear';\n let rectangleDimension = 'x=\"0\" y=\"0\" width=\"1\" height=\"1\"';\n const renderEnv = {compress: false};\n let returner;\n const directionValue = direction.toCSS(renderEnv);\n let i;\n let color;\n let position;\n let positionValue;\n let alpha;\n\n function throwArgumentDescriptor() {\n throw { type: 'Argument',\n message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' +\n ' end_color [end_position] or direction, color list' };\n }\n\n if (arguments.length == 2) {\n if (arguments[1].value.length < 2) {\n throwArgumentDescriptor();\n }\n stops = arguments[1].value;\n } else if (arguments.length < 3) {\n throwArgumentDescriptor();\n } else {\n stops = Array.prototype.slice.call(arguments, 1);\n }\n\n switch (directionValue) {\n case 'to bottom':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"0%\" y2=\"100%\"';\n break;\n case 'to right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'to bottom right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"100%\"';\n break;\n case 'to top right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"100%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'ellipse':\n case 'ellipse at center':\n gradientType = 'radial';\n gradientDirectionSvg = 'cx=\"50%\" cy=\"50%\" r=\"75%\"';\n rectangleDimension = 'x=\"-50\" y=\"-50\" width=\"101\" height=\"101\"';\n break;\n default:\n throw { type: 'Argument', message: 'svg-gradient direction must be \\'to bottom\\', \\'to right\\',' +\n ' \\'to bottom right\\', \\'to top right\\' or \\'ellipse at center\\'' };\n }\n returner = `<${gradientType}Gradient id=\"g\" ${gradientDirectionSvg}>`;\n\n for (i = 0; i < stops.length; i += 1) {\n if (stops[i] instanceof Expression) {\n color = stops[i].value[0];\n position = stops[i].value[1];\n } else {\n color = stops[i];\n position = undefined;\n }\n\n if (!(color instanceof Color) || (!((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension))) {\n throwArgumentDescriptor();\n }\n positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%';\n alpha = color.alpha;\n returner += ``;\n }\n returner += ``;\n\n returner = encodeURIComponent(returner);\n\n returner = `data:image/svg+xml,${returner}`;\n return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import Keyword from '../tree/keyword';\nimport DetachedRuleset from '../tree/detached-ruleset';\nimport Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport URL from '../tree/url';\nimport Operation from '../tree/operation';\n\nconst isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False;\nconst isunit = (n, unit) => {\n if (unit === undefined) {\n throw { type: 'Argument', message: 'missing the required second argument to isunit.' };\n }\n unit = typeof unit.value === 'string' ? unit.value : unit;\n if (typeof unit !== 'string') {\n throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' };\n }\n return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False;\n};\n\nexport default {\n isruleset: function (n) {\n return isa(n, DetachedRuleset);\n },\n iscolor: function (n) {\n return isa(n, Color);\n },\n isnumber: function (n) {\n return isa(n, Dimension);\n },\n isstring: function (n) {\n return isa(n, Quoted);\n },\n iskeyword: function (n) {\n return isa(n, Keyword);\n },\n isurl: function (n) {\n return isa(n, URL);\n },\n ispixel: function (n) {\n return isunit(n, 'px');\n },\n ispercentage: function (n) {\n return isunit(n, '%');\n },\n isem: function (n) {\n return isunit(n, 'em');\n },\n isunit,\n unit: function (val, unit) {\n if (!(val instanceof Dimension)) {\n throw { type: 'Argument',\n message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` };\n }\n if (unit) {\n if (unit instanceof Keyword) {\n unit = unit.value;\n } else {\n unit = unit.toCSS();\n }\n } else {\n unit = '';\n }\n return new Dimension(val.value, unit);\n },\n 'get-unit': function (n) {\n return new Anonymous(n.unit);\n }\n};\n","import functionRegistry from './function-registry';\nimport functionCaller from './function-caller';\n\nimport boolean from './boolean';\nimport defaultFunc from './default';\nimport color from './color';\nimport colorBlending from './color-blending';\nimport dataUri from './data-uri';\nimport list from './list';\nimport math from './math';\nimport number from './number';\nimport string from './string';\nimport svg from './svg';\nimport types from './types';\n\nexport default environment => {\n const functions = { functionRegistry, functionCaller };\n\n // register functions\n functionRegistry.addMultiple(boolean);\n functionRegistry.addMultiple(defaultFunc);\n functionRegistry.addMultiple(color);\n functionRegistry.addMultiple(colorBlending);\n functionRegistry.addMultiple(dataUri(environment));\n functionRegistry.addMultiple(list);\n functionRegistry.addMultiple(math);\n functionRegistry.addMultiple(number);\n functionRegistry.addMultiple(string);\n functionRegistry.addMultiple(svg(environment));\n functionRegistry.addMultiple(types);\n\n return functions;\n};\n","export default environment => {\n class SourceMapOutput {\n constructor(options) {\n this._css = [];\n this._rootNode = options.rootNode;\n this._contentsMap = options.contentsMap;\n this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap;\n if (options.sourceMapFilename) {\n this._sourceMapFilename = options.sourceMapFilename.replace(/\\\\/g, '/');\n }\n this._outputFilename = options.outputFilename;\n this.sourceMapURL = options.sourceMapURL;\n if (options.sourceMapBasepath) {\n this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\\\/g, '/');\n }\n if (options.sourceMapRootpath) {\n this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\\\/g, '/');\n if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') {\n this._sourceMapRootpath += '/';\n }\n } else {\n this._sourceMapRootpath = '';\n }\n this._outputSourceFiles = options.outputSourceFiles;\n this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator();\n\n this._lineNumber = 0;\n this._column = 0;\n }\n\n removeBasepath(path) {\n if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) {\n path = path.substring(this._sourceMapBasepath.length);\n if (path.charAt(0) === '\\\\' || path.charAt(0) === '/') {\n path = path.substring(1);\n }\n }\n\n return path;\n }\n\n normalizeFilename(filename) {\n filename = filename.replace(/\\\\/g, '/');\n filename = this.removeBasepath(filename);\n return (this._sourceMapRootpath || '') + filename;\n }\n\n add(chunk, fileInfo, index, mapLines) {\n // ignore adding empty strings\n if (!chunk) {\n return;\n }\n\n let lines;\n let sourceLines;\n let columns;\n let sourceColumns;\n let i;\n\n if (fileInfo && fileInfo.filename) {\n let inputSource = this._contentsMap[fileInfo.filename];\n\n // remove vars/banner added to the top of the file\n if (this._contentsIgnoredCharsMap[fileInfo.filename]) {\n // adjust the index\n index -= this._contentsIgnoredCharsMap[fileInfo.filename];\n if (index < 0) { index = 0; }\n // adjust the source\n inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]);\n }\n\n // ignore empty content\n if (inputSource === undefined) {\n return;\n }\n\n inputSource = inputSource.substring(0, index);\n sourceLines = inputSource.split('\\n');\n sourceColumns = sourceLines[sourceLines.length - 1];\n }\n\n lines = chunk.split('\\n');\n columns = lines[lines.length - 1];\n\n if (fileInfo && fileInfo.filename) {\n if (!mapLines) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column},\n original: { line: sourceLines.length, column: sourceColumns.length},\n source: this.normalizeFilename(fileInfo.filename)});\n } else {\n for (i = 0; i < lines.length; i++) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0},\n original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0},\n source: this.normalizeFilename(fileInfo.filename)});\n }\n }\n }\n\n if (lines.length === 1) {\n this._column += columns.length;\n } else {\n this._lineNumber += lines.length - 1;\n this._column = columns.length;\n }\n\n this._css.push(chunk);\n }\n\n isEmpty() {\n return this._css.length === 0;\n }\n\n toCSS(context) {\n this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null });\n\n if (this._outputSourceFiles) {\n for (const filename in this._contentsMap) {\n if (this._contentsMap.hasOwnProperty(filename)) {\n let source = this._contentsMap[filename];\n if (this._contentsIgnoredCharsMap[filename]) {\n source = source.slice(this._contentsIgnoredCharsMap[filename]);\n }\n this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source);\n }\n }\n }\n\n this._rootNode.genCSS(context, this);\n\n if (this._css.length > 0) {\n let sourceMapURL;\n const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON());\n\n if (this.sourceMapURL) {\n sourceMapURL = this.sourceMapURL;\n } else if (this._sourceMapFilename) {\n sourceMapURL = this._sourceMapFilename;\n }\n this.sourceMapURL = sourceMapURL;\n\n this.sourceMap = sourceMapContent;\n }\n\n return this._css.join('');\n }\n }\n\n return SourceMapOutput;\n};\n","export default (SourceMapOutput, environment) => {\n class SourceMapBuilder {\n constructor(options) {\n this.options = options;\n }\n\n toCSS(rootNode, options, imports) {\n const sourceMapOutput = new SourceMapOutput(\n {\n contentsIgnoredCharsMap: imports.contentsIgnoredChars,\n rootNode,\n contentsMap: imports.contents,\n sourceMapFilename: this.options.sourceMapFilename,\n sourceMapURL: this.options.sourceMapURL,\n outputFilename: this.options.sourceMapOutputFilename,\n sourceMapBasepath: this.options.sourceMapBasepath,\n sourceMapRootpath: this.options.sourceMapRootpath,\n outputSourceFiles: this.options.outputSourceFiles,\n sourceMapGenerator: this.options.sourceMapGenerator,\n sourceMapFileInline: this.options.sourceMapFileInline\n });\n\n const css = sourceMapOutput.toCSS(options);\n this.sourceMap = sourceMapOutput.sourceMap;\n this.sourceMapURL = sourceMapOutput.sourceMapURL;\n if (this.options.sourceMapInputFilename) {\n this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename);\n }\n if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) {\n this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL);\n }\n return css + this.getCSSAppendage();\n }\n\n getCSSAppendage() {\n\n let sourceMapURL = this.sourceMapURL;\n if (this.options.sourceMapFileInline) {\n if (this.sourceMap === undefined) {\n return '';\n }\n sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`;\n }\n\n if (sourceMapURL) {\n return `/*# sourceMappingURL=${sourceMapURL} */`;\n }\n return '';\n }\n\n getExternalSourceMap() {\n return this.sourceMap;\n }\n\n setExternalSourceMap(sourceMap) {\n this.sourceMap = sourceMap;\n }\n\n isInline() {\n return this.options.sourceMapFileInline;\n }\n\n getSourceMapURL() {\n return this.sourceMapURL;\n }\n\n getOutputFilename() {\n return this.options.sourceMapOutputFilename;\n }\n\n getInputFilename() {\n return this.sourceMapInputFilename;\n }\n }\n\n return SourceMapBuilder;\n};\n","import contexts from './contexts';\nimport visitor from './visitors';\nimport tree from './tree';\n\nexport default (root, options = {}) => {\n let evaldRoot;\n let variables = options.variables;\n const evalEnv = new contexts.Eval(options);\n\n //\n // Allows setting variables with a hash, so:\n //\n // `{ color: new tree.Color('#f01') }` will become:\n //\n // new tree.Declaration('@color',\n // new tree.Value([\n // new tree.Expression([\n // new tree.Color('#f01')\n // ])\n // ])\n // )\n //\n if (typeof variables === 'object' && !Array.isArray(variables)) {\n variables = Object.keys(variables).map(k => {\n let value = variables[k];\n\n if (!(value instanceof tree.Value)) {\n if (!(value instanceof tree.Expression)) {\n value = new tree.Expression([value]);\n }\n value = new tree.Value([value]);\n }\n return new tree.Declaration(`@${k}`, value, false, null, 0);\n });\n evalEnv.frames = [new tree.Ruleset(null, variables)];\n }\n\n const visitors = [\n new visitor.JoinSelectorVisitor(),\n new visitor.MarkVisibleSelectorsVisitor(true),\n new visitor.ExtendVisitor(),\n new visitor.ToCSSVisitor({compress: Boolean(options.compress)})\n ];\n\n const preEvalVisitors = [];\n let v;\n let visitorIterator;\n\n /**\n * first() / get() allows visitors to be added while visiting\n * \n * @todo Add scoping for visitors just like functions for @plugin; right now they're global\n */\n if (options.pluginManager) {\n visitorIterator = options.pluginManager.visitor();\n for (var i = 0; i < 2; i++) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (v.isPreEvalVisitor) {\n if (i === 0 || preEvalVisitors.indexOf(v) === -1) {\n preEvalVisitors.push(v);\n v.run(root);\n }\n }\n else {\n if (i === 0 || visitors.indexOf(v) === -1) {\n if (v.isPreVisitor) {\n visitors.unshift(v);\n }\n else {\n visitors.push(v);\n }\n }\n }\n }\n }\n }\n\n evaldRoot = root.eval(evalEnv);\n\n for (var i = 0; i < visitors.length; i++) {\n visitors[i].run(evaldRoot);\n }\n\n // Run any remaining visitors added after eval pass\n if (options.pluginManager) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (visitors.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) {\n v.run(evaldRoot);\n }\n }\n }\n\n return evaldRoot;\n};\n","import LessError from './less-error';\nimport transformTree from './transform-tree';\nimport logger from './logger';\n\nexport default SourceMapBuilder => {\n class ParseTree {\n constructor(root, imports) {\n this.root = root;\n this.imports = imports;\n }\n\n toCSS(options) {\n let evaldRoot;\n const result = {};\n let sourceMapBuilder;\n try {\n evaldRoot = transformTree(this.root, options);\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n try {\n const compress = Boolean(options.compress);\n if (compress) {\n logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.');\n }\n\n const toCSSOptions = {\n compress,\n dumpLineNumbers: options.dumpLineNumbers,\n strictUnits: Boolean(options.strictUnits),\n numPrecision: 8};\n\n if (options.sourceMap) {\n sourceMapBuilder = new SourceMapBuilder(options.sourceMap);\n result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports);\n } else {\n result.css = evaldRoot.toCSS(toCSSOptions);\n }\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n if (options.pluginManager) {\n const postProcessors = options.pluginManager.getPostProcessors();\n for (let i = 0; i < postProcessors.length; i++) {\n result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options, imports: this.imports });\n }\n }\n if (options.sourceMap) {\n result.map = sourceMapBuilder.getExternalSourceMap();\n }\n\n result.imports = [];\n for (const file in this.imports.files) {\n if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) {\n result.imports.push(file);\n }\n }\n return result;\n }\n }\n\n return ParseTree;\n};\n","import contexts from './contexts';\nimport Parser from './parser/parser';\nimport LessError from './less-error';\nimport * as utils from './utils';\nimport logger from './logger';\n\nexport default environment => {\n // FileInfo = {\n // 'rewriteUrls' - option - whether to adjust URL's to be relative\n // 'filename' - full resolved filename of current file\n // 'rootpath' - path to append to normal URLs for this node\n // 'currentDirectory' - path to the current file, absolute\n // 'rootFilename' - filename of the base file\n // 'entryPath' - absolute path to the entry file\n // 'reference' - whether the file should not be output and only output parts that are referenced\n\n class ImportManager {\n constructor(less, context, rootFileInfo) {\n this.less = less;\n this.rootFilename = rootFileInfo.filename;\n this.paths = context.paths || []; // Search paths, when importing\n this.contents = {}; // map - filename to contents of all the files\n this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore\n this.mime = context.mime;\n this.error = null;\n this.context = context;\n // Deprecated? Unused outside of here, could be useful.\n this.queue = []; // Files which haven't been imported yet\n this.files = {}; // Holds the imported parse trees.\n }\n\n /**\n * Add an import to be imported\n * @param path - the raw path\n * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension)\n * @param currentFileInfo - the current file info (used for instance to work out relative paths)\n * @param importOptions - import options\n * @param callback - callback for when it is imported\n */\n push(path, tryAppendExtension, currentFileInfo, importOptions, callback) {\n const importManager = this;\n const pluginLoader = this.context.pluginManager.Loader;\n\n this.queue.push(path);\n\n const fileParsedFunc = (e, root, fullPath) => {\n importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue\n\n const importedEqualsRoot = fullPath === importManager.rootFilename;\n if (importOptions.optional && e) {\n callback(null, {rules:[]}, false, null);\n logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`);\n }\n else {\n // Inline imports aren't cached here.\n // If we start to cache them, please make sure they won't conflict with non-inline imports of the\n // same name as they used to do before this comment and the condition below have been added.\n if (!importManager.files[fullPath] && !importOptions.inline) {\n importManager.files[fullPath] = { root, options: importOptions };\n }\n if (e && !importManager.error) { importManager.error = e; }\n callback(e, root, importedEqualsRoot, fullPath);\n }\n };\n\n const newFileInfo = {\n rewriteUrls: this.context.rewriteUrls,\n entryPath: currentFileInfo.entryPath,\n rootpath: currentFileInfo.rootpath,\n rootFilename: currentFileInfo.rootFilename\n };\n\n const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment);\n\n if (!fileManager) {\n fileParsedFunc({ message: `Could not find a file-manager for ${path}` });\n return;\n }\n\n const loadFileCallback = loadedFile => {\n let plugin;\n const resolvedFilename = loadedFile.filename;\n const contents = loadedFile.contents.replace(/^\\uFEFF/, '');\n\n // Pass on an updated rootpath if path of imported file is relative and file\n // is in a (sub|sup) directory\n //\n // Examples:\n // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/',\n // then rootpath should become 'less/module/nav/'\n // - If path of imported file is '../mixins.less' and rootpath is 'less/',\n // then rootpath should become 'less/../'\n newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename);\n if (newFileInfo.rewriteUrls) {\n newFileInfo.rootpath = fileManager.join(\n (importManager.context.rootpath || ''),\n fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath));\n\n if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) {\n newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath);\n }\n }\n newFileInfo.filename = resolvedFilename;\n\n const newEnv = new contexts.Parse(importManager.context);\n\n newEnv.processImports = false;\n importManager.contents[resolvedFilename] = contents;\n\n if (currentFileInfo.reference || importOptions.reference) {\n newFileInfo.reference = true;\n }\n\n if (importOptions.isPlugin) {\n plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo);\n if (plugin instanceof LessError) {\n fileParsedFunc(plugin, null, resolvedFilename);\n }\n else {\n fileParsedFunc(null, plugin, resolvedFilename);\n }\n } else if (importOptions.inline) {\n fileParsedFunc(null, contents, resolvedFilename);\n } else {\n\n // import (multiple) parse trees apparently get altered and can't be cached.\n // TODO: investigate why this is\n if (importManager.files[resolvedFilename]\n && !importManager.files[resolvedFilename].options.multiple\n && !importOptions.multiple) {\n\n fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename);\n }\n else {\n new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => {\n fileParsedFunc(e, root, resolvedFilename);\n });\n }\n }\n };\n let promise;\n const context = utils.clone(this.context);\n\n if (tryAppendExtension) {\n context.ext = importOptions.isPlugin ? '.js' : '.less';\n }\n\n if (importOptions.isPlugin) {\n context.mime = 'application/javascript';\n promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager);\n }\n else {\n promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment,\n (err, loadedFile) => {\n if (err) {\n fileParsedFunc(err);\n } else {\n loadFileCallback(loadedFile);\n }\n });\n }\n if (promise) {\n promise.then(loadFileCallback, fileParsedFunc);\n }\n }\n }\n\n return ImportManager;\n};\n","let PromiseConstructor;\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const render = function (input, options, callback) {\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n render.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n this.parse(input, options, (err, root, imports, options) => {\n if (err) { return callback(err); }\n\n let result;\n try {\n const parseTree = new ParseTree(root, imports);\n result = parseTree.toCSS(options);\n }\n catch (err) { return callback(err); }\n\n callback(null, result);\n });\n }\n };\n\n return render;\n};\n","/**\n * Plugin Manager\n */\nclass PluginManager {\n constructor(less) {\n this.less = less;\n this.visitors = [];\n this.preProcessors = [];\n this.postProcessors = [];\n this.installedPlugins = [];\n this.fileManagers = [];\n this.iterator = -1;\n this.pluginCache = {};\n this.Loader = new less.PluginLoader(less);\n }\n\n /**\n * Adds all the plugins in the array\n * @param {Array} plugins\n */\n addPlugins(plugins) {\n if (plugins) {\n for (let i = 0; i < plugins.length; i++) {\n this.addPlugin(plugins[i]);\n }\n }\n }\n\n /**\n *\n * @param plugin\n * @param {String} filename\n */\n addPlugin(plugin, filename, functionRegistry) {\n this.installedPlugins.push(plugin);\n if (filename) {\n this.pluginCache[filename] = plugin;\n }\n if (plugin.install) {\n plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry);\n }\n }\n\n /**\n *\n * @param filename\n */\n get(filename) {\n return this.pluginCache[filename];\n }\n\n /**\n * Adds a visitor. The visitor object has options on itself to determine\n * when it should run.\n * @param visitor\n */\n addVisitor(visitor) {\n this.visitors.push(visitor);\n }\n\n /**\n * Adds a pre processor object\n * @param {object} preProcessor\n * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import\n */\n addPreProcessor(preProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) {\n if (this.preProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.preProcessors.splice(indexToInsertAt, 0, {preProcessor, priority});\n }\n\n /**\n * Adds a post processor object\n * @param {object} postProcessor\n * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression\n */\n addPostProcessor(postProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) {\n if (this.postProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.postProcessors.splice(indexToInsertAt, 0, {postProcessor, priority});\n }\n\n /**\n *\n * @param manager\n */\n addFileManager(manager) {\n this.fileManagers.push(manager);\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPreProcessors() {\n const preProcessors = [];\n for (let i = 0; i < this.preProcessors.length; i++) {\n preProcessors.push(this.preProcessors[i].preProcessor);\n }\n return preProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPostProcessors() {\n const postProcessors = [];\n for (let i = 0; i < this.postProcessors.length; i++) {\n postProcessors.push(this.postProcessors[i].postProcessor);\n }\n return postProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getVisitors() {\n return this.visitors;\n }\n\n visitor() {\n const self = this;\n return {\n first: function() {\n self.iterator = -1;\n return self.visitors[self.iterator];\n },\n get: function() {\n self.iterator += 1;\n return self.visitors[self.iterator];\n }\n };\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getFileManagers() {\n return this.fileManagers;\n }\n}\n\nlet pm;\n\nconst PluginManagerFactory = (less, newFactory) => {\n if (newFactory || !pm) {\n pm = new PluginManager(less);\n }\n return pm;\n };\n\n//\nexport default PluginManagerFactory;\n","let PromiseConstructor;\nimport contexts from './contexts';\nimport Parser from './parser/parser';\nimport PluginManager from './plugin-manager';\nimport LessError from './less-error';\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const parse = function (input, options, callback) {\n\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n parse.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n let context;\n let rootFileInfo;\n const pluginManager = new PluginManager(this, !options.reUsePluginManager);\n\n options.pluginManager = pluginManager;\n\n context = new contexts.Parse(options);\n\n if (options.rootFileInfo) {\n rootFileInfo = options.rootFileInfo;\n } else {\n const filename = options.filename || 'input';\n const entryPath = filename.replace(/[^\\/\\\\]*$/, '');\n rootFileInfo = {\n filename,\n rewriteUrls: context.rewriteUrls,\n rootpath: context.rootpath || '',\n currentDirectory: entryPath,\n entryPath,\n rootFilename: filename\n };\n // add in a missing trailing slash\n if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') {\n rootFileInfo.rootpath += '/';\n }\n }\n\n const imports = new ImportManager(this, context, rootFileInfo);\n this.importManager = imports;\n\n // TODO: allow the plugins to be just a list of paths or names\n // Do an async plugin queue like lessc\n\n if (options.plugins) {\n options.plugins.forEach(plugin => {\n let evalResult;\n let contents;\n if (plugin.fileContent) {\n contents = plugin.fileContent.replace(/^\\uFEFF/, '');\n evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename);\n if (evalResult instanceof LessError) {\n return callback(evalResult);\n }\n }\n else {\n pluginManager.addPlugin(plugin);\n }\n });\n }\n\n new Parser(context, imports, rootFileInfo)\n .parse(input, (e, root) => {\n if (e) { return callback(e); }\n callback(null, root, imports, options);\n }, options);\n }\n };\n return parse;\n};\n","import data from './data';\nimport tree from './tree';\nimport Environment from './environment/environment';\nimport AbstractFileManager from './environment/abstract-file-manager';\nimport AbstractPluginLoader from './environment/abstract-plugin-loader';\nimport visitors from './visitors';\nimport Parser from './parser/parser';\nimport Functions from './functions';\nimport contexts from './contexts';\nimport sourceMapOutput from './source-map-output';\nimport sourceMapBuilder from './source-map-builder';\nimport parseTree from './parse-tree';\nimport importManager from './import-manager';\nimport Render from './render';\nimport Parse from './parse';\nimport LessError from './less-error';\nimport transformTree from './transform-tree';\nimport * as utils from './utils';\nimport PluginManager from './plugin-manager';\nimport logger from './logger';\n\nexport default (environment, fileManagers) => {\n const SourceMapOutput = sourceMapOutput(environment);\n const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment);\n const ParseTree = parseTree(SourceMapBuilder);\n const ImportManager = importManager(environment);\n const render = Render(environment, ParseTree, ImportManager);\n const parse = Parse(environment, ParseTree, ImportManager);\n const environ = new Environment(environment, fileManagers);\n const functions = Functions(environment);\n\n const initial = {\n version: [3, 9, 0],\n data,\n tree,\n Environment,\n AbstractFileManager,\n AbstractPluginLoader,\n environment: environ,\n visitors,\n Parser,\n functions,\n contexts,\n SourceMapOutput,\n SourceMapBuilder,\n ParseTree,\n ImportManager,\n render,\n parse,\n LessError,\n transformTree,\n utils,\n PluginManager,\n logger\n };\n\n // Create a public API\n\n const ctor = t => (function(...args) {\n const obj = Object.create(t.prototype);\n t.apply(obj, Array.prototype.slice.call(args, 0));\n return obj;\n });\n let t;\n const api = Object.create(initial);\n for (const n in initial.tree) {\n /* eslint guard-for-in: 0 */\n t = initial.tree[n];\n if (typeof t === 'function') {\n api[n.toLowerCase()] = ctor(t);\n }\n else {\n api[n] = Object.create(null);\n for (const o in t) {\n /* eslint guard-for-in: 0 */\n api[n][o.toLowerCase()] = ctor(t[o]);\n }\n }\n }\n\n return api;\n};\n","/* global window, XMLHttpRequest */\n\nexport default (options, logger) => {\n\n const AbstractFileManager = require('../less/environment/abstract-file-manager.js');\n\n let fileCache = {};\n\n // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load\n const FileManager = () => {\n };\n\n FileManager.prototype = new AbstractFileManager();\n\n FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() {\n return true;\n };\n FileManager.prototype.join = function join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return this.extractUrlParts(laterPath, basePath).path;\n };\n FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) {\n\n const xhr = new XMLHttpRequest();\n const async = options.isFileProtocol ? options.fileAsync : true;\n\n if (typeof xhr.overrideMimeType === 'function') {\n xhr.overrideMimeType('text/css');\n }\n logger.debug(`XHR: Getting '${url}'`);\n xhr.open('GET', url, async);\n xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');\n xhr.send(null);\n\n function handleResponse(xhr, callback, errback) {\n if (xhr.status >= 200 && xhr.status < 300) {\n callback(xhr.responseText,\n xhr.getResponseHeader('Last-Modified'));\n } else if (typeof errback === 'function') {\n errback(xhr.status, url);\n }\n }\n\n if (options.isFileProtocol && !options.fileAsync) {\n if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {\n callback(xhr.responseText);\n } else {\n errback(xhr.status, url);\n }\n } else if (async) {\n xhr.onreadystatechange = () => {\n if (xhr.readyState == 4) {\n handleResponse(xhr, callback, errback);\n }\n };\n } else {\n handleResponse(xhr, callback, errback);\n }\n };\n FileManager.prototype.supports = (filename, currentDirectory, options, environment) => true;\n\n FileManager.prototype.clearFileCache = () => {\n fileCache = {};\n };\n\n FileManager.prototype.loadFile = function loadFile(filename, currentDirectory, options, environment) {\n // TODO: Add prefix support like less-node?\n // What about multiple paths?\n\n if (currentDirectory && !this.isPathAbsolute(filename)) {\n filename = currentDirectory + filename;\n }\n\n filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename;\n\n options = options || {};\n\n // sheet may be set to the stylesheet for the initial load or a collection of properties including\n // some context variables for imports\n const hrefParts = this.extractUrlParts(filename, window.location.href);\n const href = hrefParts.url;\n const self = this;\n \n return new Promise((resolve, reject) => {\n if (options.useFileCache && fileCache[href]) {\n try {\n const lessText = fileCache[href];\n return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }});\n } catch (e) {\n return reject({ filename: href, message: `Error loading file ${href} error was ${e.message}` });\n }\n }\n\n self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) {\n // per file cache\n fileCache[href] = data;\n\n // Use remote copy (re-parse)\n resolve({ contents: data, filename: href, webInfo: { lastModified }});\n }, function doXHRError(status, url) {\n reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href });\n });\n });\n };\n\n return FileManager;\n};\n","// TODO: Add tests for browser @plugin\n/* global window */\n\nimport AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js';\n\n/**\n * Browser Plugin Loader\n */\nclass PluginLoader extends AbstractPluginLoader {\n constructor(less) {\n this.less = less;\n // Should we shim this.require for browser? Probably not?\n }\n\n loadPlugin(filename, basePath, context, environment, fileManager) {\n return new Promise((fulfill, reject) => {\n fileManager.loadFile(filename, basePath, context, environment)\n .then(fulfill).catch(reject);\n });\n }\n}\n\nexport default PluginLoader;\n\n","export default (less, options) => {\n const logLevel_debug = 4;\n const logLevel_info = 3;\n const logLevel_warn = 2;\n const logLevel_error = 1;\n\n // The amount of logging in the javascript console.\n // 3 - Debug, information and errors\n // 2 - Information and errors\n // 1 - Errors\n // 0 - None\n // Defaults to 2\n options.logLevel = typeof options.logLevel !== 'undefined' ? options.logLevel : (options.env === 'development' ? logLevel_info : logLevel_error);\n\n if (!options.loggers) {\n options.loggers = [{\n debug: function(msg) {\n if (options.logLevel >= logLevel_debug) {\n console.log(msg);\n }\n },\n info: function(msg) {\n if (options.logLevel >= logLevel_info) {\n console.log(msg);\n }\n },\n warn: function(msg) {\n if (options.logLevel >= logLevel_warn) {\n console.warn(msg);\n }\n },\n error: function(msg) {\n if (options.logLevel >= logLevel_error) {\n console.error(msg);\n }\n }\n }];\n }\n for (let i = 0; i < options.loggers.length; i++) {\n less.logger.addListener(options.loggers[i]);\n }\n};\n","import * as utils from './utils';\nimport browser from './browser';\n\nexport default (window, less, options) => {\n\n function errorHTML(e, rootHref) {\n const id = `less-error-message:${utils.extractId(rootHref || '')}`;\n const template = '
  • {content}
    • ';\n const elem = window.document.createElement('div');\n let timer;\n let content;\n const errors = [];\n const filename = e.filename || rootHref;\n const filenameNoPath = filename.match(/([^\\/]+(\\?.*)?)$/)[1];\n\n elem.id = id;\n elem.className = 'less-error-message';\n\n content = `

    ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}

    in ${filenameNoPath} `;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += `on line ${e.line}, column ${e.column + 1}:

      ${errors.join('')}
    `;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `
    Stack Trace
    ${e.stack.split('\\n').slice(1).join('
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\ No newline at end of file diff --git a/lib/less-browser/bootstrap.js b/lib/less-browser/bootstrap.js index ccdf6832d..aa01c64b3 100644 --- a/lib/less-browser/bootstrap.js +++ b/lib/less-browser/bootstrap.js @@ -5,12 +5,11 @@ */ /* global window, document */ -// TODO - consider switching this out for a recommendation for this polyfill? -// -// Browsers have good Promise support -require('promise/polyfill'); +import defaultOptions from '../less/default-options'; +import addDefaultOptions from './add-default-options'; +import root from './index'; -const options = require('../less/default-options')(); +const options = defaultOptions(); if (window.less) { for (const key in window.less) { @@ -19,7 +18,7 @@ if (window.less) { } } } -require('./add-default-options')(window, options); +addDefaultOptions(window, options); options.plugins = options.plugins || []; @@ -27,7 +26,8 @@ if (window.LESS_PLUGINS) { options.plugins = options.plugins.concat(window.LESS_PLUGINS); } -const less = module.exports = require('./index')(window, options); +const less = root(window, options); +export default less; window.less = less; diff --git a/lib/less-browser/browser.js b/lib/less-browser/browser.js index d8668fb50..58f339ccf 100644 --- a/lib/less-browser/browser.js +++ b/lib/less-browser/browser.js @@ -1,4 +1,4 @@ -import utils from './utils'; +import * as utils from './utils'; export default { createCSS: function (document, styles, sheet) { diff --git a/lib/less-browser/error-reporting.js b/lib/less-browser/error-reporting.js index 6a0aee673..ebf4860ca 100644 --- a/lib/less-browser/error-reporting.js +++ b/lib/less-browser/error-reporting.js @@ -1,4 +1,4 @@ -import utils from './utils'; +import * as utils from './utils'; import browser from './browser'; export default (window, less, options) => { diff --git a/lib/less-browser/image-size.js b/lib/less-browser/image-size.js index 540c3fa04..8e3caccdf 100644 --- a/lib/less-browser/image-size.js +++ b/lib/less-browser/image-size.js @@ -1,7 +1,7 @@ -export default () => { - const functionRegistry = require('./../less/functions/function-registry'); +import functionRegistry from './../less/functions/function-registry'; +export default () => { function imageSize() { throw { type: 'Runtime', diff --git a/lib/less-browser/index.js b/lib/less-browser/index.js index a86e2a01d..09b98969a 100644 --- a/lib/less-browser/index.js +++ b/lib/less-browser/index.js @@ -3,25 +3,31 @@ // Should expose the additional browser functions on to the less object // import {addDataAttr} from './utils'; - +import lessRoot from '../less'; import browser from './browser'; +import FM from './file-manager'; +import PluginLoader from './plugin-loader'; +import LogListener from './log-listener'; +import ErrorReporting from './error-reporting'; +import Cache from './cache'; +import ImageSize from './image-size'; export default (window, options) => { const document = window.document; - const less = require('../less')(); + const less = lessRoot(); less.options = options; const environment = less.environment; - const FileManager = require('./file-manager')(options, less.logger); + const FileManager = FM(options, less.logger); const fileManager = new FileManager(); environment.addFileManager(fileManager); less.FileManager = FileManager; - less.PluginLoader = require('./plugin-loader'); + less.PluginLoader = PluginLoader; - require('./log-listener')(less, options); - const errors = require('./error-reporting')(window, less, options); - const cache = less.cache = options.cache || require('./cache')(window, options, less.logger); - require('./image-size')(less.environment); + LogListener(less, options); + const errors = ErrorReporting(window, less, options); + const cache = less.cache = options.cache || Cache(window, options, less.logger); + ImageSize(less.environment); // Setup user functions - Deprecate? if (options.functions) { diff --git a/lib/less-browser/utils.js b/lib/less-browser/utils.js index edc88bcc7..2a9915cc3 100644 --- a/lib/less-browser/utils.js +++ b/lib/less-browser/utils.js @@ -1,24 +1,24 @@ -export default { - extractId: function(href) { - return href.replace(/^[a-z-]+:\/+?[^\/]+/, '') // Remove protocol & domain - .replace(/[\?\&]livereload=\w+/, '') // Remove LiveReload cachebuster - .replace(/^\//, '') // Remove root / - .replace(/\.[a-zA-Z]+$/, '') // Remove simple extension - .replace(/[^\.\w-]+/g, '-') // Replace illegal characters - .replace(/\./g, ':'); // Replace dots with colons(for valid id) - }, - addDataAttr: function(options, tag) { - for (const opt in tag.dataset) { - if (tag.dataset.hasOwnProperty(opt)) { - if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') { - options[opt] = tag.dataset[opt]; - } else { - try { - options[opt] = JSON.parse(tag.dataset[opt]); - } - catch (_) {} + +export function extractId(href) { + return href.replace(/^[a-z-]+:\/+?[^\/]+/, '') // Remove protocol & domain + .replace(/[\?\&]livereload=\w+/, '') // Remove LiveReload cachebuster + .replace(/^\//, '') // Remove root / + .replace(/\.[a-zA-Z]+$/, '') // Remove simple extension + .replace(/[^\.\w-]+/g, '-') // Replace illegal characters + .replace(/\./g, ':'); // Replace dots with colons(for valid id) +} + +export function addDataAttr(options, tag) { + for (const opt in tag.dataset) { + if (tag.dataset.hasOwnProperty(opt)) { + if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') { + options[opt] = tag.dataset[opt]; + } else { + try { + options[opt] = JSON.parse(tag.dataset[opt]); } + catch (_) {} } } } -}; +} diff --git a/lib/less-node/environment.js b/lib/less-node/environment.js index a9b790c9b..6fe57b329 100644 --- a/lib/less-node/environment.js +++ b/lib/less-node/environment.js @@ -1,3 +1,6 @@ +import mime from 'mime'; +import sourceMap from 'source-map'; + export default { encodeBase64: function encodeBase64(str) { // Avoid Buffer constructor on newer versions of Node.js. @@ -5,12 +8,12 @@ export default { return buffer.toString('base64'); }, mimeLookup: function (filename) { - return require('mime').lookup(filename); + return mime.lookup(filename); }, charsetLookup: function (mime) { - return require('mime').charsets.lookup(mime); + return mime.charsets.lookup(mime); }, getSourceMapGenerator: function getSourceMapGenerator() { - return require('source-map').SourceMapGenerator; + return sourceMap.SourceMapGenerator; } }; diff --git a/lib/less-node/file-manager.js b/lib/less-node/file-manager.js index 92fa63664..f45f25428 100644 --- a/lib/less-node/file-manager.js +++ b/lib/less-node/file-manager.js @@ -1,6 +1,5 @@ import path from 'path'; import fs from './fs'; -const PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; import AbstractFileManager from '../less/environment/abstract-file-manager.js'; class FileManager extends AbstractFileManager { @@ -51,7 +50,7 @@ class FileManager extends AbstractFileManager { // promise is guaranteed to be asyncronous // which helps as it allows the file handle // to be closed before it continues with the next file - return new PromiseConstructor(getFileData); + return new Promise(getFileData); } function returnData(data) { diff --git a/lib/less-node/image-size.js b/lib/less-node/image-size.js index 4aa770ec1..e14ad0cc9 100644 --- a/lib/less-node/image-size.js +++ b/lib/less-node/image-size.js @@ -1,7 +1,8 @@ +import Dimension from '../less/tree/dimension'; +import Expression from '../less/tree/expression'; +import functionRegistry from './../less/functions/function-registry'; + export default environment => { - const Dimension = require('../less/tree/dimension'); - const Expression = require('../less/tree/expression'); - const functionRegistry = require('./../less/functions/function-registry'); function imageSize(functionContext, filePathNode) { let filePath = filePathNode.value; diff --git a/lib/less-node/index.js b/lib/less-node/index.js index fc8c4fe4d..ae08a8952 100644 --- a/lib/less-node/index.js +++ b/lib/less-node/index.js @@ -2,22 +2,26 @@ import environment from './environment'; import FileManager from './file-manager'; import UrlFileManager from './url-file-manager'; import createFromEnvironment from '../less'; -const less = createFromEnvironment(environment, [new FileManager(), new UrlFileManager()]); import lesscHelper from './lessc-helper'; -import path from 'path'; +import PluginLoader from './plugin-loader'; +import fs from './fs'; +import defaultOptions from '../less/default-options'; +import imageSize from './image-size'; + +const less = createFromEnvironment(environment, [new FileManager(), new UrlFileManager()]); // allow people to create less with their own environment less.createFromEnvironment = createFromEnvironment; less.lesscHelper = lesscHelper; -less.PluginLoader = require('./plugin-loader'); -less.fs = require('./fs'); +less.PluginLoader = PluginLoader; +less.fs = fs; less.FileManager = FileManager; less.UrlFileManager = UrlFileManager; // Set up options -less.options = require('../less/default-options')(); +less.options = defaultOptions(); // provide image-size functionality -require('./image-size')(less.environment); +imageSize(less.environment); export default less; diff --git a/lib/less-node/plugin-loader.js b/lib/less-node/plugin-loader.js index 961ba8460..2657a61a0 100644 --- a/lib/less-node/plugin-loader.js +++ b/lib/less-node/plugin-loader.js @@ -1,5 +1,4 @@ import path from 'path'; -const PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; import AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js'; /** @@ -29,7 +28,7 @@ class PluginLoader extends AbstractPluginLoader { context.prefixes = ['less-plugin-', '']; } - return new PromiseConstructor((fulfill, reject) => { + return new Promise((fulfill, reject) => { fileManager.loadFile(filename, basePath, context, environment).then( data => { try { diff --git a/lib/less-node/url-file-manager.js b/lib/less-node/url-file-manager.js index 7fda8f1e7..0bb132783 100644 --- a/lib/less-node/url-file-manager.js +++ b/lib/less-node/url-file-manager.js @@ -1,7 +1,6 @@ const isUrlRe = /^(?:https?:)?\/\//i; import url from 'url'; let request; -let PromiseConstructor; import AbstractFileManager from '../less/environment/abstract-file-manager.js'; import logger from '../less/logger'; @@ -13,10 +12,7 @@ UrlFileManager.prototype = new AbstractFileManager(); UrlFileManager.prototype.supports = (filename, currentDirectory, options, environment) => isUrlRe.test( filename ) || isUrlRe.test(currentDirectory); UrlFileManager.prototype.loadFile = (filename, currentDirectory, options, environment) => { - if (!PromiseConstructor) { - PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; - } - return new PromiseConstructor((fulfill, reject) => { + return new Promise((fulfill, reject) => { if (request === undefined) { try { request = require('request'); } catch (e) { request = null; } diff --git a/lib/less/constants.js b/lib/less/constants.js index 93bb94b93..3c57c7ec6 100644 --- a/lib/less/constants.js +++ b/lib/less/constants.js @@ -1,13 +1,13 @@ -export default { - Math: { - ALWAYS: 0, - PARENS_DIVISION: 1, - PARENS: 2, - STRICT_LEGACY: 3 - }, - RewriteUrls: { - OFF: 0, - LOCAL: 1, - ALL: 2 - } + +export const Math = { + ALWAYS: 0, + PARENS_DIVISION: 1, + PARENS: 2, + STRICT_LEGACY: 3 +}; + +export const RewriteUrls = { + OFF: 0, + LOCAL: 1, + ALL: 2 }; \ No newline at end of file diff --git a/lib/less/contexts.js b/lib/less/contexts.js index d67abfc8a..0d8fd6e22 100644 --- a/lib/less/contexts.js +++ b/lib/less/contexts.js @@ -1,6 +1,6 @@ const contexts = {}; export default contexts; -import Constants from './constants'; +import * as Constants from './constants'; const copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) { if (!original) { return; } diff --git a/lib/less/data/index.js b/lib/less/data/index.js index b7e4f5939..1a7d75bc4 100644 --- a/lib/less/data/index.js +++ b/lib/less/data/index.js @@ -1,4 +1,4 @@ -export default { - colors: require('./colors'), - unitConversions: require('./unit-conversions') -}; +import colors from './colors'; +import unitConversions from './unit-conversions'; + +export default { colors, unitConversions }; diff --git a/lib/less/functions/boolean.js b/lib/less/functions/boolean.js index 5afc33a4d..97b514a93 100644 --- a/lib/less/functions/boolean.js +++ b/lib/less/functions/boolean.js @@ -1,15 +1,13 @@ - -import functionRegistry from './function-registry'; import Anonymous from '../tree/anonymous'; import Keyword from '../tree/keyword'; -functionRegistry.addMultiple({ - boolean: function(condition) { - return condition ? Keyword.True : Keyword.False; - }, +function boolean(condition) { + return condition ? Keyword.True : Keyword.False; +} + +function If(condition, trueValue, falseValue) { + return condition ? trueValue + : (falseValue || new Anonymous); +} - 'if': function(condition, trueValue, falseValue) { - return condition ? trueValue - : (falseValue || new Anonymous); - } -}); +export default { boolean, 'if': If }; diff --git a/lib/less/functions/color-blending.js b/lib/less/functions/color-blending.js index be2a5beb4..ee38d061c 100644 --- a/lib/less/functions/color-blending.js +++ b/lib/less/functions/color-blending.js @@ -1,5 +1,4 @@ import Color from '../tree/color'; -import functionRegistry from './function-registry'; // Color Blending // ref: http://www.w3.org/TR/compositing-1 @@ -82,4 +81,4 @@ for (const f in colorBlendModeFunctions) { } } -functionRegistry.addMultiple(colorBlend); +export default colorBlend; diff --git a/lib/less/functions/color.js b/lib/less/functions/color.js index c86a023a6..ba0e0baf6 100644 --- a/lib/less/functions/color.js +++ b/lib/less/functions/color.js @@ -2,7 +2,6 @@ import Dimension from '../tree/dimension'; import Color from '../tree/color'; import Quoted from '../tree/quoted'; import Anonymous from '../tree/anonymous'; -import functionRegistry from './function-registry'; let colorFunctions; function clamp(val) { @@ -414,4 +413,5 @@ colorFunctions = { return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount); } }; -functionRegistry.addMultiple(colorFunctions); + +export default colorFunctions; diff --git a/lib/less/functions/data-uri.js b/lib/less/functions/data-uri.js index b2ec5ae47..3c09c507f 100644 --- a/lib/less/functions/data-uri.js +++ b/lib/less/functions/data-uri.js @@ -1,12 +1,13 @@ +import Quoted from '../tree/quoted'; +import URL from '../tree/url'; +import * as utils from '../utils'; +import logger from '../logger'; + export default environment => { - const Quoted = require('../tree/quoted'); - const URL = require('../tree/url'); - const utils = require('../utils'); - const functionRegistry = require('./function-registry'); - const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); - const logger = require('../logger'); + + const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); - functionRegistry.add('data-uri', function(mimetypeNode, filePathNode) { + return { 'data-uri': function(mimetypeNode, filePathNode) { if (!filePathNode) { filePathNode = mimetypeNode; @@ -68,18 +69,6 @@ export default environment => { const uri = `data:${mimetype},${buf}${fragment}`; - // IE8 cannot handle a data-uri larger than 32,768 characters. If this is exceeded - // and the --ieCompat flag is enabled, return a normal url() instead. - const DATA_URI_MAX = 32768; - if (uri.length >= DATA_URI_MAX) { - - if (this.context.ieCompat !== false) { - logger.warn(`Skipped data-uri embedding of ${filePath} because its size (${uri.length} characters) exceeds IE8-safe ${DATA_URI_MAX} characters!`); - - return fallback(this, filePathNode || mimetypeNode); - } - } - return new URL(new Quoted(`"${uri}"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); - }); + }}; }; diff --git a/lib/less/functions/default.js b/lib/less/functions/default.js index d35bdd014..e5c36d707 100644 --- a/lib/less/functions/default.js +++ b/lib/less/functions/default.js @@ -1,5 +1,4 @@ import Keyword from '../tree/keyword'; -import functionRegistry from './function-registry'; const defaultFunc = { eval: function () { @@ -23,6 +22,4 @@ const defaultFunc = { } }; -functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc)); - -export default defaultFunc; +export default { 'default': defaultFunc.eval.bind(defaultFunc) }; diff --git a/lib/less/functions/index.js b/lib/less/functions/index.js index 260dd26af..eaaafdb08 100644 --- a/lib/less/functions/index.js +++ b/lib/less/functions/index.js @@ -1,21 +1,33 @@ +import functionRegistry from './function-registry'; +import functionCaller from './function-caller'; + +import boolean from './boolean'; +import defaultFunc from './default'; +import color from './color'; +import colorBlending from './color-blending'; +import dataUri from './data-uri'; +import list from './list'; +import math from './math'; +import number from './number'; +import string from './string'; +import svg from './svg'; +import types from './types'; + export default environment => { - const functions = { - functionRegistry: require('./function-registry'), - functionCaller: require('./function-caller') - }; + const functions = { functionRegistry, functionCaller }; // register functions - require('./boolean'); - require('./default'); - require('./color'); - require('./color-blending'); - require('./data-uri')(environment); - require('./list'); - require('./math'); - require('./number'); - require('./string'); - require('./svg')(environment); - require('./types'); + functionRegistry.addMultiple(boolean); + functionRegistry.addMultiple(defaultFunc); + functionRegistry.addMultiple(color); + functionRegistry.addMultiple(colorBlending); + functionRegistry.addMultiple(dataUri(environment)); + functionRegistry.addMultiple(list); + functionRegistry.addMultiple(math); + functionRegistry.addMultiple(number); + functionRegistry.addMultiple(string); + functionRegistry.addMultiple(svg(environment)); + functionRegistry.addMultiple(types); return functions; }; diff --git a/lib/less/functions/list.js b/lib/less/functions/list.js index 81959e681..56435c5e0 100644 --- a/lib/less/functions/list.js +++ b/lib/less/functions/list.js @@ -6,7 +6,6 @@ import Ruleset from '../tree/ruleset'; import Selector from '../tree/selector'; import Element from '../tree/element'; import Quote from '../tree/quoted'; -import functionRegistry from './function-registry'; const getItemsFromNode = node => { // handle non-array values as an array of length 1 @@ -17,7 +16,7 @@ const getItemsFromNode = node => { return items; }; -functionRegistry.addMultiple({ +export default { _SELF: function(n) { return n; }, @@ -140,4 +139,4 @@ functionRegistry.addMultiple({ rs.visibilityInfo() ).eval(this.context); } -}); +}; diff --git a/lib/less/functions/math-helper.js b/lib/less/functions/math-helper.js index 839339ab2..ed6deaa75 100644 --- a/lib/less/functions/math-helper.js +++ b/lib/less/functions/math-helper.js @@ -1,8 +1,6 @@ import Dimension from '../tree/dimension'; -const MathHelper = () => { -}; -MathHelper._math = (fn, unit, n) => { +const MathHelper = (fn, unit, n) => { if (!(n instanceof Dimension)) { throw { type: 'Argument', message: 'argument must be a number' }; } @@ -13,4 +11,5 @@ MathHelper._math = (fn, unit, n) => { } return new Dimension(fn(parseFloat(n.value)), unit); }; + export default MathHelper; \ No newline at end of file diff --git a/lib/less/functions/math.js b/lib/less/functions/math.js index c741468ed..f025dc2e2 100644 --- a/lib/less/functions/math.js +++ b/lib/less/functions/math.js @@ -1,4 +1,3 @@ -import functionRegistry from './function-registry'; import mathHelper from './math-helper.js'; const mathFunctions = { @@ -17,13 +16,13 @@ const mathFunctions = { for (const f in mathFunctions) { if (mathFunctions.hasOwnProperty(f)) { - mathFunctions[f] = mathHelper._math.bind(null, Math[f], mathFunctions[f]); + mathFunctions[f] = mathHelper.bind(null, Math[f], mathFunctions[f]); } } mathFunctions.round = (n, f) => { const fraction = typeof f === 'undefined' ? 0 : f.value; - return mathHelper._math(num => num.toFixed(fraction), null, n); + return mathHelper(num => num.toFixed(fraction), null, n); }; -functionRegistry.addMultiple(mathFunctions); +export default mathFunctions; diff --git a/lib/less/functions/number.js b/lib/less/functions/number.js index ece58412a..54c9944fc 100644 --- a/lib/less/functions/number.js +++ b/lib/less/functions/number.js @@ -1,6 +1,5 @@ import Dimension from '../tree/dimension'; import Anonymous from '../tree/anonymous'; -import functionRegistry from './function-registry'; import mathHelper from './math-helper.js'; const minMax = function (isMin, args) { @@ -55,7 +54,8 @@ const minMax = function (isMin, args) { args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', '); return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`); }; -functionRegistry.addMultiple({ + +export default { min: function(...args) { return minMax(true, args); }, @@ -82,8 +82,8 @@ functionRegistry.addMultiple({ return new Dimension(Math.pow(x.value, y.value), x.unit); }, percentage: function (n) { - const result = mathHelper._math(num => num * 100, '%', n); + const result = mathHelper(num => num * 100, '%', n); return result; } -}); +}; diff --git a/lib/less/functions/string.js b/lib/less/functions/string.js index 3942274ac..e2fc569ff 100644 --- a/lib/less/functions/string.js +++ b/lib/less/functions/string.js @@ -2,9 +2,8 @@ import Quoted from '../tree/quoted'; import Anonymous from '../tree/anonymous'; import Quote from '../tree/quoted'; import JavaScript from '../tree/javascript'; -import functionRegistry from './function-registry'; -functionRegistry.addMultiple({ +export default { e: function (str) { return new Quote('"', str instanceof JavaScript ? str.evaluated : str.value, true); }, @@ -35,4 +34,4 @@ functionRegistry.addMultiple({ result = result.replace(/%%/g, '%'); return new Quoted(string.quote || '', result, string.escaped); } -}); +}; diff --git a/lib/less/functions/svg.js b/lib/less/functions/svg.js index ddda4535c..3df96d66f 100644 --- a/lib/less/functions/svg.js +++ b/lib/less/functions/svg.js @@ -1,12 +1,11 @@ -export default environment => { - const Dimension = require('../tree/dimension'); - const Color = require('../tree/color'); - const Expression = require('../tree/expression'); - const Quoted = require('../tree/quoted'); - const URL = require('../tree/url'); - const functionRegistry = require('./function-registry'); +import Dimension from '../tree/dimension'; +import Color from '../tree/color'; +import Expression from '../tree/expression'; +import Quoted from '../tree/quoted'; +import URL from '../tree/url'; - functionRegistry.add('svg-gradient', function(direction) { +export default environment => { + return { 'svg-gradient': function(direction) { let stops; let gradientDirectionSvg; let gradientType = 'linear'; @@ -84,5 +83,5 @@ export default environment => { returner = `data:image/svg+xml,${returner}`; return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); - }); + }}; }; diff --git a/lib/less/functions/types.js b/lib/less/functions/types.js index c3a35c3a3..6f1aff30f 100644 --- a/lib/less/functions/types.js +++ b/lib/less/functions/types.js @@ -6,9 +6,8 @@ import Quoted from '../tree/quoted'; import Anonymous from '../tree/anonymous'; import URL from '../tree/url'; import Operation from '../tree/operation'; -import functionRegistry from './function-registry'; -const isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False; +const isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False; const isunit = (n, unit) => { if (unit === undefined) { throw { type: 'Argument', message: 'missing the required second argument to isunit.' }; @@ -20,7 +19,7 @@ const isunit = (n, unit) => { return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False; }; -functionRegistry.addMultiple({ +export default { isruleset: function (n) { return isa(n, DetachedRuleset); }, @@ -68,4 +67,4 @@ functionRegistry.addMultiple({ 'get-unit': function (n) { return new Anonymous(n.unit); } -}); +}; diff --git a/lib/less/import-manager.js b/lib/less/import-manager.js index f055dbadc..471484505 100644 --- a/lib/less/import-manager.js +++ b/lib/less/import-manager.js @@ -1,8 +1,7 @@ import contexts from './contexts'; import Parser from './parser/parser'; import LessError from './less-error'; -import utils from './utils'; -const PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; +import * as utils from './utils'; import logger from './logger'; export default environment => { diff --git a/lib/less/index.js b/lib/less/index.js index 8d4dfbb3c..3ad126c1e 100644 --- a/lib/less/index.js +++ b/lib/less/index.js @@ -1,33 +1,57 @@ +import data from './data'; +import tree from './tree'; +import Environment from './environment/environment'; +import AbstractFileManager from './environment/abstract-file-manager'; +import AbstractPluginLoader from './environment/abstract-plugin-loader'; +import visitors from './visitors'; +import Parser from './parser/parser'; +import Functions from './functions'; +import contexts from './contexts'; +import sourceMapOutput from './source-map-output'; +import sourceMapBuilder from './source-map-builder'; +import parseTree from './parse-tree'; +import importManager from './import-manager'; +import Render from './render'; +import Parse from './parse'; +import LessError from './less-error'; +import transformTree from './transform-tree'; +import * as utils from './utils'; +import PluginManager from './plugin-manager'; +import logger from './logger'; + export default (environment, fileManagers) => { - let SourceMapOutput; - let SourceMapBuilder; - let ParseTree; - let ImportManager; - let Environment; + const SourceMapOutput = sourceMapOutput(environment); + const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment); + const ParseTree = parseTree(SourceMapBuilder); + const ImportManager = importManager(environment); + const render = Render(environment, ParseTree, ImportManager); + const parse = Parse(environment, ParseTree, ImportManager); + const environ = new Environment(environment, fileManagers); + const functions = Functions(environment); const initial = { version: [3, 9, 0], - data: require('./data'), - tree: require('./tree'), - Environment: (Environment = require('./environment/environment')), - AbstractFileManager: require('./environment/abstract-file-manager'), - AbstractPluginLoader: require('./environment/abstract-plugin-loader'), - environment: (environment = new Environment(environment, fileManagers)), - visitors: require('./visitors'), - Parser: require('./parser/parser'), - functions: require('./functions')(environment), - contexts: require('./contexts'), - SourceMapOutput: (SourceMapOutput = require('./source-map-output')(environment)), - SourceMapBuilder: (SourceMapBuilder = require('./source-map-builder')(SourceMapOutput, environment)), - ParseTree: (ParseTree = require('./parse-tree')(SourceMapBuilder)), - ImportManager: (ImportManager = require('./import-manager')(environment)), - render: require('./render')(environment, ParseTree, ImportManager), - parse: require('./parse')(environment, ParseTree, ImportManager), - LessError: require('./less-error'), - transformTree: require('./transform-tree'), - utils: require('./utils'), - PluginManager: require('./plugin-manager'), - logger: require('./logger') + data, + tree, + Environment, + AbstractFileManager, + AbstractPluginLoader, + environment: environ, + visitors, + Parser, + functions, + contexts, + SourceMapOutput, + SourceMapBuilder, + ParseTree, + ImportManager, + render, + parse, + LessError, + transformTree, + utils, + PluginManager, + logger }; // Create a public API diff --git a/lib/less/less-error.js b/lib/less/less-error.js index 252a2e3a3..a9a0f2f19 100644 --- a/lib/less/less-error.js +++ b/lib/less/less-error.js @@ -1,4 +1,4 @@ -import utils from './utils'; +import * as utils from './utils'; /** * This is a centralized class of any error that could be thrown internally (mostly by the parser). * Besides standard .message it keeps some additional data like a path to the file where the error @@ -21,7 +21,7 @@ import utils from './utils'; * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager? * @param {string} [currentFilename] */ -const LessError = module.exports = function LessError(e, fileContentMap, currentFilename) { +const LessError = function LessError(e, fileContentMap, currentFilename) { Error.call(this); const filename = e.filename || currentFilename; @@ -136,3 +136,5 @@ LessError.prototype.toString = function(options = {}) { return message; }; + +export default LessError; \ No newline at end of file diff --git a/lib/less/parse.js b/lib/less/parse.js index a64bf6ff5..159dd956f 100644 --- a/lib/less/parse.js +++ b/lib/less/parse.js @@ -3,7 +3,7 @@ import contexts from './contexts'; import Parser from './parser/parser'; import PluginManager from './plugin-manager'; import LessError from './less-error'; -import utils from './utils'; +import * as utils from './utils'; export default (environment, ParseTree, ImportManager) => { const parse = function (input, options, callback) { @@ -17,11 +17,8 @@ export default (environment, ParseTree, ImportManager) => { } if (!callback) { - if (!PromiseConstructor) { - PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; - } const self = this; - return new PromiseConstructor((resolve, reject) => { + return new Promise((resolve, reject) => { parse.call(self, input, options, (err, output) => { if (err) { reject(err); diff --git a/lib/less/parser/parser.js b/lib/less/parser/parser.js index 52338bc50..b658294b2 100644 --- a/lib/less/parser/parser.js +++ b/lib/less/parser/parser.js @@ -2,7 +2,7 @@ import LessError from '../less-error'; import tree from '../tree'; import visitors from '../visitors'; import getParserInput from './parser-input'; -import utils from '../utils'; +import * as utils from '../utils'; import functionRegistry from '../functions/function-registry'; // diff --git a/lib/less/render.js b/lib/less/render.js index 55c3adcbd..faa8d5e45 100644 --- a/lib/less/render.js +++ b/lib/less/render.js @@ -1,5 +1,5 @@ let PromiseConstructor; -import utils from './utils'; +import * as utils from './utils'; export default (environment, ParseTree, ImportManager) => { const render = function (input, options, callback) { @@ -12,11 +12,8 @@ export default (environment, ParseTree, ImportManager) => { } if (!callback) { - if (!PromiseConstructor) { - PromiseConstructor = typeof Promise === 'undefined' ? require('promise') : Promise; - } const self = this; - return new PromiseConstructor((resolve, reject) => { + return new Promise((resolve, reject) => { render.call(self, input, options, (err, output) => { if (err) { reject(err); diff --git a/lib/less/tree/declaration.js b/lib/less/tree/declaration.js index 8c16c7a6e..8559a46c8 100644 --- a/lib/less/tree/declaration.js +++ b/lib/less/tree/declaration.js @@ -2,7 +2,9 @@ import Node from './node'; import Value from './value'; import Keyword from './keyword'; import Anonymous from './anonymous'; -import {Math as MATH} from '../constants'; +import * as Constants from '../constants'; +const MATH = Constants.Math; + class Declaration extends Node { constructor(name, value, important, merge, index, currentFileInfo, inline, variable) { diff --git a/lib/less/tree/detached-ruleset.js b/lib/less/tree/detached-ruleset.js index c3e95f64b..231eb87da 100644 --- a/lib/less/tree/detached-ruleset.js +++ b/lib/less/tree/detached-ruleset.js @@ -1,6 +1,6 @@ import Node from './node'; import contexts from '../contexts'; -import utils from '../utils'; +import * as utils from '../utils'; class DetachedRuleset extends Node { constructor(ruleset, frames) { diff --git a/lib/less/tree/expression.js b/lib/less/tree/expression.js index 35ff4118b..f554dc049 100644 --- a/lib/less/tree/expression.js +++ b/lib/less/tree/expression.js @@ -2,7 +2,8 @@ import Node from './node'; import Paren from './paren'; import Comment from './comment'; import Dimension from './dimension'; -import {Math as MATH} from '../constants'; +import * as Constants from '../constants'; +const MATH = Constants.Math; class Expression extends Node { constructor(value, noSpacing) { diff --git a/lib/less/tree/import.js b/lib/less/tree/import.js index 37e169768..9d6d5f2cd 100644 --- a/lib/less/tree/import.js +++ b/lib/less/tree/import.js @@ -4,7 +4,7 @@ import URL from './url'; import Quoted from './quoted'; import Ruleset from './ruleset'; import Anonymous from './anonymous'; -import utils from '../utils'; +import * as utils from '../utils'; import LessError from '../less-error'; // diff --git a/lib/less/tree/index.js b/lib/less/tree/index.js index 4ea226da8..912697c75 100644 --- a/lib/less/tree/index.js +++ b/lib/less/tree/index.js @@ -1,42 +1,54 @@ const tree = Object.create(null); -tree.Node = require('./node'); -tree.Color = require('./color'); -tree.AtRule = require('./atrule'); -tree.DetachedRuleset = require('./detached-ruleset'); -tree.Operation = require('./operation'); -tree.Dimension = require('./dimension'); -tree.Unit = require('./unit'); -tree.Keyword = require('./keyword'); -tree.Variable = require('./variable'); -tree.Property = require('./property'); -tree.Ruleset = require('./ruleset'); -tree.Element = require('./element'); -tree.Attribute = require('./attribute'); -tree.Combinator = require('./combinator'); -tree.Selector = require('./selector'); -tree.Quoted = require('./quoted'); -tree.Expression = require('./expression'); -tree.Declaration = require('./declaration'); -tree.Call = require('./call'); -tree.URL = require('./url'); -tree.Import = require('./import'); -tree.mixin = { - Call: require('./mixin-call'), - Definition: require('./mixin-definition') -}; -tree.Comment = require('./comment'); -tree.Anonymous = require('./anonymous'); -tree.Value = require('./value'); -tree.JavaScript = require('./javascript'); -tree.Assignment = require('./assignment'); -tree.Condition = require('./condition'); -tree.Paren = require('./paren'); -tree.Media = require('./media'); -tree.UnicodeDescriptor = require('./unicode-descriptor'); -tree.Negative = require('./negative'); -tree.Extend = require('./extend'); -tree.VariableCall = require('./variable-call'); -tree.NamespaceValue = require('./namespace-value'); +import Node from './node'; +import Color from './color'; +import AtRule from './atrule'; +import DetachedRuleset from './detached-ruleset'; +import Operation from './operation'; +import Dimension from './dimension'; +import Unit from './unit'; +import Keyword from './keyword'; +import Variable from './variable'; +import Property from './property'; +import Ruleset from './ruleset'; +import Element from './element'; +import Attribute from './attribute'; +import Combinator from './combinator'; +import Selector from './selector'; +import Quoted from './quoted'; +import Expression from './expression'; +import Declaration from './declaration'; +import Call from './call'; +import URL from './url'; +import Import from './import'; +import Comment from './comment'; +import Anonymous from './anonymous'; +import Value from './value'; +import JavaScript from './javascript'; +import Assignment from './assignment'; +import Condition from './condition'; +import Paren from './paren'; +import Media from './media'; +import UnicodeDescriptor from './unicode-descriptor'; +import Negative from './negative'; +import Extend from './extend'; +import VariableCall from './variable-call'; +import NamespaceValue from './namespace-value'; -export default tree; +// mixins +import MixinCall from './mixin-call'; +import MixinDefinition from './mixin-definition'; + +export default { + Node, Color, AtRule, DetachedRuleset, Operation, + Dimension, Unit, Keyword, Variable, Property, + Ruleset, Element, Attribute, Combinator, Selector, + Quoted, Expression, Declaration, Call, URL, Import, + Comment, Anonymous, Value, JavaScript, Assignment, + Condition, Paren, Media, UnicodeDescriptor, Negative, + Extend, VariableCall, NamespaceValue, + mixin: { + Call: MixinCall, + Definition: MixinDefinition + } +}; \ No newline at end of file diff --git a/lib/less/tree/media.js b/lib/less/tree/media.js index 625fd039a..5bc73575c 100644 --- a/lib/less/tree/media.js +++ b/lib/less/tree/media.js @@ -4,7 +4,7 @@ import Selector from './selector'; import Anonymous from './anonymous'; import Expression from './expression'; import AtRule from './atrule'; -import utils from '../utils'; +import * as utils from '../utils'; class Media extends AtRule { constructor(value, features, index, currentFileInfo, visibilityInfo) { diff --git a/lib/less/tree/mixin-definition.js b/lib/less/tree/mixin-definition.js index 6b4c5bcb2..6deb52b88 100644 --- a/lib/less/tree/mixin-definition.js +++ b/lib/less/tree/mixin-definition.js @@ -5,7 +5,7 @@ import Declaration from './declaration'; import DetachedRuleset from './detached-ruleset'; import Expression from './expression'; import contexts from '../contexts'; -import utils from '../utils'; +import * as utils from '../utils'; class Definition extends Ruleset { constructor(name, params, rules, condition, variadic, frames, visibilityInfo) { diff --git a/lib/less/tree/operation.js b/lib/less/tree/operation.js index 5e7d4469a..019b847db 100644 --- a/lib/less/tree/operation.js +++ b/lib/less/tree/operation.js @@ -1,7 +1,9 @@ import Node from './node'; import Color from './color'; import Dimension from './dimension'; -import {Math as MATH} from '../constants'; +import * as Constants from '../constants'; +const MATH = Constants.Math; + class Operation extends Node { constructor(op, operands, isSpaced) { diff --git a/lib/less/tree/ruleset.js b/lib/less/tree/ruleset.js index 12ab10c21..4cf33a502 100644 --- a/lib/less/tree/ruleset.js +++ b/lib/less/tree/ruleset.js @@ -10,7 +10,7 @@ import contexts from '../contexts'; import globalFunctionRegistry from '../functions/function-registry'; import defaultFunc from '../functions/default'; import getDebugInfo from './debug-info'; -import utils from '../utils'; +import * as utils from '../utils'; class Ruleset extends Node { constructor(selectors, rules, strictImports, visibilityInfo) { diff --git a/lib/less/tree/unit.js b/lib/less/tree/unit.js index 8459a902a..334a8d68c 100644 --- a/lib/less/tree/unit.js +++ b/lib/less/tree/unit.js @@ -1,6 +1,6 @@ import Node from './node'; import unitConversions from '../data/unit-conversions'; -import utils from '../utils'; +import * as utils from '../utils'; class Unit extends Node { constructor(numerator, denominator, backupUnit) { diff --git a/lib/less/utils.js b/lib/less/utils.js index dce890bc2..9a1541d8e 100644 --- a/lib/less/utils.js +++ b/lib/less/utils.js @@ -1,121 +1,116 @@ /* jshint proto: true */ -import Constants from './constants'; +import * as Constants from './constants'; +import CloneHelper from 'clone'; -import clone from 'clone'; +export function getLocation(index, inputStream) { + let n = index + 1; + let line = null; + let column = -1; -const utils = { - getLocation: function(index, inputStream) { - let n = index + 1; - let line = null; - let column = -1; - - while (--n >= 0 && inputStream.charAt(n) !== '\n') { - column++; - } + while (--n >= 0 && inputStream.charAt(n) !== '\n') { + column++; + } - if (typeof index === 'number') { - line = (inputStream.slice(0, index).match(/\n/g) || '').length; - } + if (typeof index === 'number') { + line = (inputStream.slice(0, index).match(/\n/g) || '').length; + } - return { - line, - column - }; - }, - copyArray: function(arr) { - let i; - const length = arr.length; - const copy = new Array(length); + return { + line, + column + }; +} +export function copyArray(arr) { + let i; + const length = arr.length; + const copy = new Array(length); - for (i = 0; i < length; i++) { - copy[i] = arr[i]; - } - return copy; - }, - clone: function (obj) { - const cloned = {}; - for (const prop in obj) { - if (obj.hasOwnProperty(prop)) { - cloned[prop] = obj[prop]; - } - } - return cloned; - }, - copyOptions: function(obj1, obj2) { - if (obj2 && obj2._defaults) { - return obj2; - } - const opts = utils.defaults(obj1, obj2); - if (opts.strictMath) { - opts.math = Constants.Math.STRICT_LEGACY; - } - // Back compat with changed relativeUrls option - if (opts.relativeUrls) { - opts.rewriteUrls = Constants.RewriteUrls.ALL; - } - if (typeof opts.math === 'string') { - switch (opts.math.toLowerCase()) { - case 'always': - opts.math = Constants.Math.ALWAYS; - break; - case 'parens-division': - opts.math = Constants.Math.PARENS_DIVISION; - break; - case 'strict': - case 'parens': - opts.math = Constants.Math.PARENS; - break; - case 'strict-legacy': - opts.math = Constants.Math.STRICT_LEGACY; - } + for (i = 0; i < length; i++) { + copy[i] = arr[i]; + } + return copy; +} +export function clone(obj) { + const cloned = {}; + for (const prop in obj) { + if (obj.hasOwnProperty(prop)) { + cloned[prop] = obj[prop]; } - if (typeof opts.rewriteUrls === 'string') { - switch (opts.rewriteUrls.toLowerCase()) { - case 'off': - opts.rewriteUrls = Constants.RewriteUrls.OFF; - break; - case 'local': - opts.rewriteUrls = Constants.RewriteUrls.LOCAL; - break; - case 'all': - opts.rewriteUrls = Constants.RewriteUrls.ALL; - break; - } + } + return cloned; +} +export function copyOptions(obj1, obj2) { + if (obj2 && obj2._defaults) { + return obj2; + } + const opts = utils.defaults(obj1, obj2); + if (opts.strictMath) { + opts.math = Constants.Math.STRICT_LEGACY; + } + // Back compat with changed relativeUrls option + if (opts.relativeUrls) { + opts.rewriteUrls = Constants.RewriteUrls.ALL; + } + if (typeof opts.math === 'string') { + switch (opts.math.toLowerCase()) { + case 'always': + opts.math = Constants.Math.ALWAYS; + break; + case 'parens-division': + opts.math = Constants.Math.PARENS_DIVISION; + break; + case 'strict': + case 'parens': + opts.math = Constants.Math.PARENS; + break; + case 'strict-legacy': + opts.math = Constants.Math.STRICT_LEGACY; } - return opts; - }, - defaults: function(obj1, obj2) { - let newObj = obj2 || {}; - if (!obj2._defaults) { - newObj = {}; - const defaults = clone(obj1); - newObj._defaults = defaults; - const cloned = obj2 ? clone(obj2) : {}; - Object.assign(newObj, defaults, cloned); + } + if (typeof opts.rewriteUrls === 'string') { + switch (opts.rewriteUrls.toLowerCase()) { + case 'off': + opts.rewriteUrls = Constants.RewriteUrls.OFF; + break; + case 'local': + opts.rewriteUrls = Constants.RewriteUrls.LOCAL; + break; + case 'all': + opts.rewriteUrls = Constants.RewriteUrls.ALL; + break; } - return newObj; - }, - merge: function(obj1, obj2) { - for (const prop in obj2) { - if (obj2.hasOwnProperty(prop)) { - obj1[prop] = obj2[prop]; - } + } + return opts; +} +export function defaults(obj1, obj2) { + let newObj = obj2 || {}; + if (!obj2._defaults) { + newObj = {}; + const defaults = CloneHelper(obj1); + newObj._defaults = defaults; + const cloned = obj2 ? CloneHelper(obj2) : {}; + Object.assign(newObj, defaults, cloned); + } + return newObj; +} +export function merge(obj1, obj2) { + for (const prop in obj2) { + if (obj2.hasOwnProperty(prop)) { + obj1[prop] = obj2[prop]; } - return obj1; - }, - flattenArray: function(arr, result = []) { - for (let i = 0, length = arr.length; i < length; i++) { - const value = arr[i]; - if (Array.isArray(value)) { - utils.flattenArray(value, result); - } else { - if (value !== undefined) { - result.push(value); - } + } + return obj1; +} +export function flattenArray(arr, result = []) { + for (let i = 0, length = arr.length; i < length; i++) { + const value = arr[i]; + if (Array.isArray(value)) { + utils.flattenArray(value, result); + } else { + if (value !== undefined) { + result.push(value); } } - return result; } -}; - -export default utils; \ No newline at end of file + return result; +} \ No newline at end of file diff --git a/lib/less/visitors/extend-visitor.js b/lib/less/visitors/extend-visitor.js index 895944c45..962cba43a 100644 --- a/lib/less/visitors/extend-visitor.js +++ b/lib/less/visitors/extend-visitor.js @@ -1,7 +1,7 @@ import tree from '../tree'; import Visitor from './visitor'; import logger from '../logger'; -import utils from '../utils'; +import * as utils from '../utils'; /* jshint loopfunc:true */ diff --git a/lib/less/visitors/import-visitor.js b/lib/less/visitors/import-visitor.js index 8d2405a6e..a83cd4331 100644 --- a/lib/less/visitors/import-visitor.js +++ b/lib/less/visitors/import-visitor.js @@ -1,7 +1,7 @@ import contexts from '../contexts'; import Visitor from './visitor'; import ImportSequencer from './import-sequencer'; -import utils from '../utils'; +import * as utils from '../utils'; const ImportVisitor = function(importer, finish) { diff --git a/lib/less/visitors/index.js b/lib/less/visitors/index.js index 722725af0..96deb76c4 100644 --- a/lib/less/visitors/index.js +++ b/lib/less/visitors/index.js @@ -1,10 +1,15 @@ -const visitors = { - Visitor: require('./visitor'), - ImportVisitor: require('./import-visitor'), - MarkVisibleSelectorsVisitor: require('./set-tree-visibility-visitor'), - ExtendVisitor: require('./extend-visitor'), - JoinSelectorVisitor: require('./join-selector-visitor'), - ToCSSVisitor: require('./to-css-visitor') -}; +import Visitor from './visitor'; +import ImportVisitor from './import-visitor'; +import MarkVisibleSelectorsVisitor from './set-tree-visibility-visitor'; +import ExtendVisitor from './extend-visitor'; +import JoinSelectorVisitor from './join-selector-visitor'; +import ToCSSVisitor from './to-css-visitor'; -export default visitors; +export default { + Visitor, + ImportVisitor, + MarkVisibleSelectorsVisitor, + ExtendVisitor, + JoinSelectorVisitor, + ToCSSVisitor +}; diff --git a/package.json b/package.json index 73638d3cb..f0b95cdd9 100644 --- a/package.json +++ b/package.json @@ -52,6 +52,7 @@ }, "devDependencies": { "@babel/core": "^7.5.5", + "@babel/preset-env": "^7.5.5", "@typescript-eslint/eslint-plugin": "^1.13.0", "@typescript-eslint/parser": "^1.13.0", "bootstrap-less-port": "0.3.0", @@ -82,6 +83,8 @@ "read-glob": "^3.0.0", "rollup": "^1.17.0", "rollup-plugin-babel": "^4.3.3", + "rollup-plugin-commonjs": "^10.0.1", + "rollup-plugin-node-resolve": "^5.2.0", "time-grunt": "^1.3.0", "uikit": "2.27.4" }, From c2573569ba9b1359afc32b7c1ea1c5c72e5a7e17 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Wed, 31 Jul 2019 13:51:19 -0700 Subject: [PATCH 03/17] WIP browser rollup working --- lib/less-browser/file-manager.js | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/less-browser/file-manager.js b/lib/less-browser/file-manager.js index 64b2b20ee..06e8a7620 100644 --- a/lib/less-browser/file-manager.js +++ b/lib/less-browser/file-manager.js @@ -1,8 +1,8 @@ /* global window, XMLHttpRequest */ -export default (options, logger) => { +import AbstractFileManager from '../less/environment/abstract-file-manager.js'; - const AbstractFileManager = require('../less/environment/abstract-file-manager.js'); +export default (options, logger) => { let fileCache = {}; From bd7273e78872d44cf7ef2f00ecd2edbc3952bfb5 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Thu, 1 Aug 2019 04:34:22 -0700 Subject: [PATCH 04/17] Updated rollup config --- .babelrc | 5 - build/rollup.js | 35 +- dist/less.cjs.js | 12522 +++++++++++++++++++++++++++++++++++++++++++++ dist/less.js | 33 +- package.json | 2 + 5 files changed, 12571 insertions(+), 26 deletions(-) delete mode 100644 .babelrc create mode 100644 dist/less.cjs.js diff --git a/.babelrc b/.babelrc deleted file mode 100644 index 60cad8d15..000000000 --- a/.babelrc +++ /dev/null @@ -1,5 +0,0 @@ -{ - "presets": [ - ["@babel/env", {"modules": false}] - ] -} \ No newline at end of file diff --git a/build/rollup.js b/build/rollup.js index aac34e222..d4293c134 100644 --- a/build/rollup.js +++ b/build/rollup.js @@ -2,9 +2,13 @@ const rollup = require('rollup'); const babel = require('rollup-plugin-babel'); const resolve = require('rollup-plugin-node-resolve'); const commonjs = require('rollup-plugin-commonjs'); +const terser = require('rollup-plugin-terser').terser; async function buildBrowser() { let bundle; + const outputOptions = { + + }; try { bundle = await rollup.rollup({ input: './lib/less-browser/bootstrap.js', @@ -12,6 +16,9 @@ async function buildBrowser() { resolve(), commonjs(), babel({ + presets: [["@babel/env", { + targets: '> 0.25%, not dead' + }]], exclude: 'node_modules/**' // only transpile our source code }) ] @@ -22,9 +29,24 @@ async function buildBrowser() { return; } + const cache = bundle.cache; + await bundle.write({ file: './dist/less.js', format: 'umd', + name: 'less' + }); + + bundle = await rollup.rollup({ + cache, + plugins: [ + terser() + ] + }); + + await bundle.write({ + file: './dist/less.min.js', + format: 'umd', name: 'less', sourcemap: true }); @@ -36,9 +58,16 @@ async function buildNode() { bundle = await rollup.rollup({ input: './lib/less-node/index.js', plugins: [ - resolve(), + resolve({ + only: [/^\.{0,2}\//], + }), commonjs(), babel({ + presets: [["@babel/env", { + targets: { + node: '6' + } + }]], exclude: 'node_modules/**' // only transpile our source code }) ] @@ -56,8 +85,8 @@ async function buildNode() { } async function build() { - // await buildBrowser(); - await buildNode(); + await buildBrowser(); + // await buildNode(); } build(); \ No newline at end of file diff --git a/dist/less.cjs.js b/dist/less.cjs.js new file mode 100644 index 000000000..51102a859 --- /dev/null +++ b/dist/less.cjs.js @@ -0,0 +1,12522 @@ +'use strict'; + +function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; } + +var mime = _interopDefault(require('mime')); +var sourceMap = _interopDefault(require('source-map')); +var path = _interopDefault(require('path')); +var url = _interopDefault(require('url')); +var CloneHelper = _interopDefault(require('clone')); + +var environment = { + encodeBase64: function encodeBase64(str) { + // Avoid Buffer constructor on newer versions of Node.js. + const buffer = Buffer.from ? Buffer.from(str) : new Buffer(str); + return buffer.toString('base64'); + }, + mimeLookup: function mimeLookup(filename) { + return mime.lookup(filename); + }, + charsetLookup: function charsetLookup(mime) { + return mime.charsets.lookup(mime); + }, + getSourceMapGenerator: function getSourceMapGenerator() { + return sourceMap.SourceMapGenerator; + } +}; + +let fs; + +try { + fs = require('graceful-fs'); +} catch (e) { + fs = require('fs'); +} + +var fs$1 = fs; + +const abstractFileManager = () => {}; + +abstractFileManager.prototype.getPath = filename => { + let j = filename.lastIndexOf('?'); + + if (j > 0) { + filename = filename.slice(0, j); + } + + j = filename.lastIndexOf('/'); + + if (j < 0) { + j = filename.lastIndexOf('\\'); + } + + if (j < 0) { + return ''; + } + + return filename.slice(0, j + 1); +}; + +abstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + +abstractFileManager.prototype.tryAppendLessExtension = function (path) { + return this.tryAppendExtension(path, '.less'); +}; + +abstractFileManager.prototype.supportsSync = () => false; + +abstractFileManager.prototype.alwaysMakePathsAbsolute = () => false; + +abstractFileManager.prototype.isPathAbsolute = filename => /^(?:[a-z-]+:|\/|\\|#)/i.test(filename); // TODO: pull out / replace? + + +abstractFileManager.prototype.join = (basePath, laterPath) => { + if (!basePath) { + return laterPath; + } + + return basePath + laterPath; +}; + +abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { + // diff between two paths to create a relative path + const urlParts = this.extractUrlParts(url); + const baseUrlParts = this.extractUrlParts(baseUrl); + let i; + let max; + let urlDirectories; + let baseUrlDirectories; + let diff = ''; + + if (urlParts.hostPart !== baseUrlParts.hostPart) { + return ''; + } + + max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); + + for (i = 0; i < max; i++) { + if (baseUrlParts.directories[i] !== urlParts.directories[i]) { + break; + } + } + + baseUrlDirectories = baseUrlParts.directories.slice(i); + urlDirectories = urlParts.directories.slice(i); + + for (i = 0; i < baseUrlDirectories.length - 1; i++) { + diff += '../'; + } + + for (i = 0; i < urlDirectories.length - 1; i++) { + diff += `${urlDirectories[i]}/`; + } + + return diff; +}; // helper function, not part of API + + +abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) { + // urlParts[1] = protocol://hostname/ OR / + // urlParts[2] = / if path relative to host base + // urlParts[3] = directories + // urlParts[4] = filename + // urlParts[5] = parameters + const urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; + const urlParts = url.match(urlPartsRegex); + const returner = {}; + let rawDirectories = []; + const directories = []; + let i; + let baseUrlParts; + + if (!urlParts) { + throw new Error(`Could not parse sheet href - '${url}'`); + } // Stylesheets in IE don't always return the full path + + + if (baseUrl && (!urlParts[1] || urlParts[2])) { + baseUrlParts = baseUrl.match(urlPartsRegex); + + if (!baseUrlParts) { + throw new Error(`Could not parse page url - '${baseUrl}'`); + } + + urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; + + if (!urlParts[2]) { + urlParts[3] = baseUrlParts[3] + urlParts[3]; + } + } + + if (urlParts[3]) { + rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); // collapse '..' and skip '.' + + for (i = 0; i < rawDirectories.length; i++) { + if (rawDirectories[i] === '..') { + directories.pop(); + } else if (rawDirectories[i] !== '.') { + directories.push(rawDirectories[i]); + } + } + } + + returner.hostPart = urlParts[1]; + returner.directories = directories; + returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); + returner.path = (urlParts[1] || '') + directories.join('/'); + returner.filename = urlParts[4]; + returner.fileUrl = returner.path + (urlParts[4] || ''); + returner.url = returner.fileUrl + (urlParts[5] || ''); + return returner; +}; + +class FileManager extends abstractFileManager { + constructor() { + this.contents = {}; + } + + supports(filename, currentDirectory, options, environment) { + return true; + } + + supportsSync(filename, currentDirectory, options, environment) { + return true; + } + + loadFile(filename, currentDirectory, options, environment, callback) { + let fullFilename; + const isAbsoluteFilename = this.isPathAbsolute(filename); + const filenamesTried = []; + const self = this; + const prefix = filename.slice(0, 1); + const explicit = prefix === '.' || prefix === '/'; + let result = null; + let isNodeModule = false; + const npmPrefix = 'npm://'; + options = options || {}; + const paths = isAbsoluteFilename ? [''] : [currentDirectory]; + + if (options.paths) { + paths.push(...options.paths); + } + + if (!isAbsoluteFilename && paths.indexOf('.') === -1) { + paths.push('.'); + } + + const prefixes = options.prefixes || ['']; + const fileParts = this.extractUrlParts(filename); + + if (options.syncImport) { + getFileData(returnData, returnData); + + if (callback) { + callback(result.error, result); + } else { + return result; + } + } else { + // promise is guaranteed to be asyncronous + // which helps as it allows the file handle + // to be closed before it continues with the next file + return new Promise(getFileData); + } + + function returnData(data) { + if (!data.filename) { + result = { + error: data + }; + } else { + result = data; + } + } + + function getFileData(fulfill, reject) { + (function tryPathIndex(i) { + if (i < paths.length) { + (function tryPrefix(j) { + if (j < prefixes.length) { + isNodeModule = false; + fullFilename = fileParts.rawPath + prefixes[j] + fileParts.filename; + + if (paths[i]) { + fullFilename = path.join(paths[i], fullFilename); + } + + if (!explicit && paths[i] === '.') { + try { + fullFilename = require.resolve(fullFilename); + isNodeModule = true; + } catch (e) { + filenamesTried.push(npmPrefix + fullFilename); + tryWithExtension(); + } + } else { + tryWithExtension(); + } + + function tryWithExtension() { + const extFilename = options.ext ? self.tryAppendExtension(fullFilename, options.ext) : fullFilename; + + if (extFilename !== fullFilename && !explicit && paths[i] === '.') { + try { + fullFilename = require.resolve(extFilename); + isNodeModule = true; + } catch (e) { + filenamesTried.push(npmPrefix + extFilename); + fullFilename = extFilename; + } + } else { + fullFilename = extFilename; + } + } + + let modified = false; + + if (self.contents[fullFilename]) { + try { + var stat = fs$1.statSync.apply(this, [fullFilename]); + + if (stat.mtime.getTime() === self.contents[fullFilename].mtime.getTime()) { + fulfill({ + contents: self.contents[fullFilename].data, + filename: fullFilename + }); + } else { + modified = true; + } + } catch (e) { + modified = true; + } + } + + if (modified || !self.contents[fullFilename]) { + const readFileArgs = [fullFilename]; + + if (!options.rawBuffer) { + readFileArgs.push('utf-8'); + } + + if (options.syncImport) { + try { + const data = fs$1.readFileSync.apply(this, readFileArgs); + var stat = fs$1.statSync.apply(this, [fullFilename]); + self.contents[fullFilename] = { + data, + mtime: stat.mtime + }; + fulfill({ + contents: data, + filename: fullFilename + }); + } catch (e) { + filenamesTried.push(isNodeModule ? npmPrefix + fullFilename : fullFilename); + return tryPrefix(j + 1); + } + } else { + readFileArgs.push(function (e, data) { + if (e) { + filenamesTried.push(isNodeModule ? npmPrefix + fullFilename : fullFilename); + return tryPrefix(j + 1); + } + + const stat = fs$1.statSync.apply(this, [fullFilename]); + self.contents[fullFilename] = { + data, + mtime: stat.mtime + }; + fulfill({ + contents: data, + filename: fullFilename + }); + }); + fs$1.readFile.apply(this, readFileArgs); + } + } + } else { + tryPathIndex(i + 1); + } + })(0); + } else { + reject({ + type: 'File', + message: `'${filename}' wasn't found. Tried - ${filenamesTried.join(',')}` + }); + } + })(0); + } + } + + loadFileSync(filename, currentDirectory, options, environment) { + options.syncImport = true; + return this.loadFile(filename, currentDirectory, options, environment); + } + +} + +var logger = { + error: function error(msg) { + this._fireEvent('error', msg); + }, + warn: function warn(msg) { + this._fireEvent('warn', msg); + }, + info: function info(msg) { + this._fireEvent('info', msg); + }, + debug: function debug(msg) { + this._fireEvent('debug', msg); + }, + addListener: function addListener(listener) { + this._listeners.push(listener); + }, + removeListener: function removeListener(listener) { + for (let i = 0; i < this._listeners.length; i++) { + if (this._listeners[i] === listener) { + this._listeners.splice(i, 1); + + return; + } + } + }, + _fireEvent: function _fireEvent(type, msg) { + for (let i = 0; i < this._listeners.length; i++) { + const logFunction = this._listeners[i][type]; + + if (logFunction) { + logFunction(msg); + } + } + }, + _listeners: [] +}; + +const isUrlRe = /^(?:https?:)?\/\//i; +let request; + +const UrlFileManager = () => {}; + +UrlFileManager.prototype = new abstractFileManager(); + +UrlFileManager.prototype.supports = (filename, currentDirectory, options, environment) => isUrlRe.test(filename) || isUrlRe.test(currentDirectory); + +UrlFileManager.prototype.loadFile = (filename, currentDirectory, options, environment) => { + return new Promise((fulfill, reject) => { + if (request === undefined) { + try { + request = require('request'); + } catch (e) { + request = null; + } + } + + if (!request) { + reject({ + type: 'File', + message: 'optional dependency \'request\' required to import over http(s)\n' + }); + return; + } + + let urlStr = isUrlRe.test(filename) ? filename : url.resolve(currentDirectory, filename); + const urlObj = url.parse(urlStr); + + if (!urlObj.protocol) { + urlObj.protocol = 'http'; + urlStr = urlObj.format(); + } + + request.get({ + uri: urlStr, + strictSSL: !options.insecure + }, (error, res, body) => { + if (error) { + reject({ + type: 'File', + message: `resource '${urlStr}' gave this Error:\n ${error}\n` + }); + return; + } + + if (res && res.statusCode === 404) { + reject({ + type: 'File', + message: `resource '${urlStr}' was not found\n` + }); + return; + } + + if (!body) { + logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`); + } + + fulfill({ + contents: body, + filename: urlStr + }); + }); + }); +}; + +var colors = { + 'aliceblue': '#f0f8ff', + 'antiquewhite': '#faebd7', + 'aqua': '#00ffff', + 'aquamarine': '#7fffd4', + 'azure': '#f0ffff', + 'beige': '#f5f5dc', + 'bisque': '#ffe4c4', + 'black': '#000000', + 'blanchedalmond': '#ffebcd', + 'blue': '#0000ff', + 'blueviolet': '#8a2be2', + 'brown': '#a52a2a', + 'burlywood': '#deb887', + 'cadetblue': '#5f9ea0', + 'chartreuse': '#7fff00', + 'chocolate': '#d2691e', + 'coral': '#ff7f50', + 'cornflowerblue': '#6495ed', + 'cornsilk': '#fff8dc', + 'crimson': '#dc143c', + 'cyan': '#00ffff', + 'darkblue': '#00008b', + 'darkcyan': '#008b8b', + 'darkgoldenrod': '#b8860b', + 'darkgray': '#a9a9a9', + 'darkgrey': '#a9a9a9', + 'darkgreen': '#006400', + 'darkkhaki': '#bdb76b', + 'darkmagenta': '#8b008b', + 'darkolivegreen': '#556b2f', + 'darkorange': '#ff8c00', + 'darkorchid': '#9932cc', + 'darkred': '#8b0000', + 'darksalmon': '#e9967a', + 'darkseagreen': '#8fbc8f', + 'darkslateblue': '#483d8b', + 'darkslategray': '#2f4f4f', + 'darkslategrey': '#2f4f4f', + 'darkturquoise': '#00ced1', + 'darkviolet': '#9400d3', + 'deeppink': '#ff1493', + 'deepskyblue': '#00bfff', + 'dimgray': '#696969', + 'dimgrey': '#696969', + 'dodgerblue': '#1e90ff', + 'firebrick': '#b22222', + 'floralwhite': '#fffaf0', + 'forestgreen': '#228b22', + 'fuchsia': '#ff00ff', + 'gainsboro': '#dcdcdc', + 'ghostwhite': '#f8f8ff', + 'gold': '#ffd700', + 'goldenrod': '#daa520', + 'gray': '#808080', + 'grey': '#808080', + 'green': '#008000', + 'greenyellow': '#adff2f', + 'honeydew': '#f0fff0', + 'hotpink': '#ff69b4', + 'indianred': '#cd5c5c', + 'indigo': '#4b0082', + 'ivory': '#fffff0', + 'khaki': '#f0e68c', + 'lavender': '#e6e6fa', + 'lavenderblush': '#fff0f5', + 'lawngreen': '#7cfc00', + 'lemonchiffon': '#fffacd', + 'lightblue': '#add8e6', + 'lightcoral': '#f08080', + 'lightcyan': '#e0ffff', + 'lightgoldenrodyellow': '#fafad2', + 'lightgray': '#d3d3d3', + 'lightgrey': '#d3d3d3', + 'lightgreen': '#90ee90', + 'lightpink': '#ffb6c1', + 'lightsalmon': '#ffa07a', + 'lightseagreen': '#20b2aa', + 'lightskyblue': '#87cefa', + 'lightslategray': '#778899', + 'lightslategrey': '#778899', + 'lightsteelblue': '#b0c4de', + 'lightyellow': '#ffffe0', + 'lime': '#00ff00', + 'limegreen': '#32cd32', + 'linen': '#faf0e6', + 'magenta': '#ff00ff', + 'maroon': '#800000', + 'mediumaquamarine': '#66cdaa', + 'mediumblue': '#0000cd', + 'mediumorchid': '#ba55d3', + 'mediumpurple': '#9370d8', + 'mediumseagreen': '#3cb371', + 'mediumslateblue': '#7b68ee', + 'mediumspringgreen': '#00fa9a', + 'mediumturquoise': '#48d1cc', + 'mediumvioletred': '#c71585', + 'midnightblue': '#191970', + 'mintcream': '#f5fffa', + 'mistyrose': '#ffe4e1', + 'moccasin': '#ffe4b5', + 'navajowhite': '#ffdead', + 'navy': '#000080', + 'oldlace': '#fdf5e6', + 'olive': '#808000', + 'olivedrab': '#6b8e23', + 'orange': '#ffa500', + 'orangered': '#ff4500', + 'orchid': '#da70d6', + 'palegoldenrod': '#eee8aa', + 'palegreen': '#98fb98', + 'paleturquoise': '#afeeee', + 'palevioletred': '#d87093', + 'papayawhip': '#ffefd5', + 'peachpuff': '#ffdab9', + 'peru': '#cd853f', + 'pink': '#ffc0cb', + 'plum': '#dda0dd', + 'powderblue': '#b0e0e6', + 'purple': '#800080', + 'rebeccapurple': '#663399', + 'red': '#ff0000', + 'rosybrown': '#bc8f8f', + 'royalblue': '#4169e1', + 'saddlebrown': '#8b4513', + 'salmon': '#fa8072', + 'sandybrown': '#f4a460', + 'seagreen': '#2e8b57', + 'seashell': '#fff5ee', + 'sienna': '#a0522d', + 'silver': '#c0c0c0', + 'skyblue': '#87ceeb', + 'slateblue': '#6a5acd', + 'slategray': '#708090', + 'slategrey': '#708090', + 'snow': '#fffafa', + 'springgreen': '#00ff7f', + 'steelblue': '#4682b4', + 'tan': '#d2b48c', + 'teal': '#008080', + 'thistle': '#d8bfd8', + 'tomato': '#ff6347', + 'turquoise': '#40e0d0', + 'violet': '#ee82ee', + 'wheat': '#f5deb3', + 'white': '#ffffff', + 'whitesmoke': '#f5f5f5', + 'yellow': '#ffff00', + 'yellowgreen': '#9acd32' +}; + +var unitConversions = { + length: { + 'm': 1, + 'cm': 0.01, + 'mm': 0.001, + 'in': 0.0254, + 'px': 0.0254 / 96, + 'pt': 0.0254 / 72, + 'pc': 0.0254 / 72 * 12 + }, + duration: { + 's': 1, + 'ms': 0.001 + }, + angle: { + 'rad': 1 / (2 * Math.PI), + 'deg': 1 / 360, + 'grad': 1 / 400, + 'turn': 1 + } +}; + +var data = { + colors, + unitConversions +}; + +class Node { + constructor() { + this.parent = null; + this.visibilityBlocks = undefined; + this.nodeVisible = undefined; + this.rootNode = null; + this.parsed = null; + const self = this; + Object.defineProperty(this, 'currentFileInfo', { + get: function get() { + return self.fileInfo(); + } + }); + Object.defineProperty(this, 'index', { + get: function get() { + return self.getIndex(); + } + }); + } + + setParent(nodes, parent) { + function set(node) { + if (node && node instanceof Node) { + node.parent = parent; + } + } + + if (Array.isArray(nodes)) { + nodes.forEach(set); + } else { + set(nodes); + } + } + + getIndex() { + return this._index || this.parent && this.parent.getIndex() || 0; + } + + fileInfo() { + return this._fileInfo || this.parent && this.parent.fileInfo() || {}; + } + + isRulesetLike() { + return false; + } + + toCSS(context) { + const strs = []; + this.genCSS(context, { + add: function add(chunk, fileInfo, index) { + strs.push(chunk); + }, + isEmpty: function isEmpty() { + return strs.length === 0; + } + }); + return strs.join(''); + } + + genCSS(context, output) { + output.add(this.value); + } + + accept(visitor) { + this.value = visitor.visit(this.value); + } + + eval() { + return this; + } + + _operate(context, op, a, b) { + switch (op) { + case '+': + return a + b; + + case '-': + return a - b; + + case '*': + return a * b; + + case '/': + return a / b; + } + } + + fround(context, value) { + const precision = context && context.numPrecision; // add "epsilon" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded: + + return precision ? Number((value + 2e-16).toFixed(precision)) : value; + } // Returns true if this node represents root of ast imported by reference + + + blocksVisibility() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + + return this.visibilityBlocks !== 0; + } + + addVisibilityBlock() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + + this.visibilityBlocks = this.visibilityBlocks + 1; + } + + removeVisibilityBlock() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + + this.visibilityBlocks = this.visibilityBlocks - 1; + } // Turns on node visibility - if called node will be shown in output regardless + // of whether it comes from import by reference or not + + + ensureVisibility() { + this.nodeVisible = true; + } // Turns off node visibility - if called node will NOT be shown in output regardless + // of whether it comes from import by reference or not + + + ensureInvisibility() { + this.nodeVisible = false; + } // return values: + // false - the node must not be visible + // true - the node must be visible + // undefined or null - the node has the same visibility as its parent + + + isVisible() { + return this.nodeVisible; + } + + visibilityInfo() { + return { + visibilityBlocks: this.visibilityBlocks, + nodeVisible: this.nodeVisible + }; + } + + copyVisibilityInfo(info) { + if (!info) { + return; + } + + this.visibilityBlocks = info.visibilityBlocks; + this.nodeVisible = info.nodeVisible; + } + +} + +Node.compare = (a, b) => { + /* returns: + -1: a < b + 0: a = b + 1: a > b + and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */ + if (a.compare && // for "symmetric results" force toCSS-based comparison + // of Quoted or Anonymous if either value is one of those + !(b.type === 'Quoted' || b.type === 'Anonymous')) { + return a.compare(b); + } else if (b.compare) { + return -b.compare(a); + } else if (a.type !== b.type) { + return undefined; + } + + a = a.value; + b = b.value; + + if (!Array.isArray(a)) { + return a === b ? 0 : undefined; + } + + if (a.length !== b.length) { + return undefined; + } + + for (let i = 0; i < a.length; i++) { + if (Node.compare(a[i], b[i]) !== 0) { + return undefined; + } + } + + return 0; +}; + +Node.numericCompare = (a, b) => a < b ? -1 : a === b ? 0 : a > b ? 1 : undefined; + +// RGB Colors - #ff0014, #eee +// + +class Color extends Node { + constructor(rgb, a, originalForm) { + const self = this; // + // The end goal here, is to parse the arguments + // into an integer triplet, such as `128, 255, 0` + // + // This facilitates operations and conversions. + // + + if (Array.isArray(rgb)) { + this.rgb = rgb; + } else if (rgb.length >= 6) { + this.rgb = []; + rgb.match(/.{2}/g).map((c, i) => { + if (i < 3) { + self.rgb.push(parseInt(c, 16)); + } else { + self.alpha = parseInt(c, 16) / 255; + } + }); + } else { + this.rgb = []; + rgb.split('').map((c, i) => { + if (i < 3) { + self.rgb.push(parseInt(c + c, 16)); + } else { + self.alpha = parseInt(c + c, 16) / 255; + } + }); + } + + this.alpha = this.alpha || (typeof a === 'number' ? a : 1); + + if (typeof originalForm !== 'undefined') { + this.value = originalForm; + } + } + + luma() { + let r = this.rgb[0] / 255; + let g = this.rgb[1] / 255; + let b = this.rgb[2] / 255; + r = r <= 0.03928 ? r / 12.92 : Math.pow((r + 0.055) / 1.055, 2.4); + g = g <= 0.03928 ? g / 12.92 : Math.pow((g + 0.055) / 1.055, 2.4); + b = b <= 0.03928 ? b / 12.92 : Math.pow((b + 0.055) / 1.055, 2.4); + return 0.2126 * r + 0.7152 * g + 0.0722 * b; + } + + genCSS(context, output) { + output.add(this.toCSS(context)); + } + + toCSS(context, doNotCompress) { + const compress = context && context.compress && !doNotCompress; + let color; + let alpha; + let colorFunction; + let args = []; // `value` is set if this color was originally + // converted from a named color string so we need + // to respect this and try to output named color too. + + alpha = this.fround(context, this.alpha); + + if (this.value) { + if (this.value.indexOf('rgb') === 0) { + if (alpha < 1) { + colorFunction = 'rgba'; + } + } else if (this.value.indexOf('hsl') === 0) { + if (alpha < 1) { + colorFunction = 'hsla'; + } else { + colorFunction = 'hsl'; + } + } else { + return this.value; + } + } else { + if (alpha < 1) { + colorFunction = 'rgba'; + } + } + + switch (colorFunction) { + case 'rgba': + args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1)); + break; + + case 'hsla': + args.push(clamp(alpha, 1)); + + case 'hsl': + color = this.toHSL(); + args = [this.fround(context, color.h), `${this.fround(context, color.s * 100)}%`, `${this.fround(context, color.l * 100)}%`].concat(args); + } + + if (colorFunction) { + // Values are capped between `0` and `255`, rounded and zero-padded. + return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`; + } + + color = this.toRGB(); + + if (compress) { + const splitcolor = color.split(''); // Convert color to short format + + if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) { + color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`; + } + } + + return color; + } // + // Operations have to be done per-channel, if not, + // channels will spill onto each other. Once we have + // our result, in the form of an integer triplet, + // we create a new Color node to hold the result. + // + + + operate(context, op, other) { + const rgb = new Array(3); + const alpha = this.alpha * (1 - other.alpha) + other.alpha; + + for (let c = 0; c < 3; c++) { + rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]); + } + + return new Color(rgb, alpha); + } + + toRGB() { + return toHex(this.rgb); + } + + toHSL() { + const r = this.rgb[0] / 255; + const g = this.rgb[1] / 255; + const b = this.rgb[2] / 255; + const a = this.alpha; + const max = Math.max(r, g, b); + const min = Math.min(r, g, b); + let h; + let s; + const l = (max + min) / 2; + const d = max - min; + + if (max === min) { + h = s = 0; + } else { + s = l > 0.5 ? d / (2 - max - min) : d / (max + min); + + switch (max) { + case r: + h = (g - b) / d + (g < b ? 6 : 0); + break; + + case g: + h = (b - r) / d + 2; + break; + + case b: + h = (r - g) / d + 4; + break; + } + + h /= 6; + } + + return { + h: h * 360, + s, + l, + a + }; + } // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript + + + toHSV() { + const r = this.rgb[0] / 255; + const g = this.rgb[1] / 255; + const b = this.rgb[2] / 255; + const a = this.alpha; + const max = Math.max(r, g, b); + const min = Math.min(r, g, b); + let h; + let s; + const v = max; + const d = max - min; + + if (max === 0) { + s = 0; + } else { + s = d / max; + } + + if (max === min) { + h = 0; + } else { + switch (max) { + case r: + h = (g - b) / d + (g < b ? 6 : 0); + break; + + case g: + h = (b - r) / d + 2; + break; + + case b: + h = (r - g) / d + 4; + break; + } + + h /= 6; + } + + return { + h: h * 360, + s, + v, + a + }; + } + + toARGB() { + return toHex([this.alpha * 255].concat(this.rgb)); + } + + compare(x) { + return x.rgb && x.rgb[0] === this.rgb[0] && x.rgb[1] === this.rgb[1] && x.rgb[2] === this.rgb[2] && x.alpha === this.alpha ? 0 : undefined; + } + +} + +Color.prototype.type = 'Color'; + +function clamp(v, max) { + return Math.min(Math.max(v, 0), max); +} + +function toHex(v) { + return `#${v.map(c => { + c = clamp(Math.round(c), 255); + return (c < 16 ? '0' : '') + c.toString(16); + }).join('')}`; +} + +Color.fromKeyword = keyword => { + let c; + const key = keyword.toLowerCase(); + + if (colors.hasOwnProperty(key)) { + c = new Color(colors[key].slice(1)); + } else if (key === 'transparent') { + c = new Color([0, 0, 0], 0); + } + + if (c) { + c.value = keyword; + return c; + } +}; + +class Paren extends Node { + constructor(node) { + this.value = node; + } + + genCSS(context, output) { + output.add('('); + this.value.genCSS(context, output); + output.add(')'); + } + + eval(context) { + return new Paren(this.value.eval(context)); + } + +} + +Paren.prototype.type = 'Paren'; + +class Combinator extends Node { + constructor(value) { + if (value === ' ') { + this.value = ' '; + this.emptyOrWhitespace = true; + } else { + this.value = value ? value.trim() : ''; + this.emptyOrWhitespace = this.value === ''; + } + } + + genCSS(context, output) { + const spaceOrEmpty = context.compress || _noSpaceCombinators[this.value] ? '' : ' '; + output.add(spaceOrEmpty + this.value + spaceOrEmpty); + } + +} + +Combinator.prototype.type = 'Combinator'; +const _noSpaceCombinators = { + '': true, + ' ': true, + '|': true +}; + +class Element extends Node { + constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) { + this.combinator = combinator instanceof Combinator ? combinator : new Combinator(combinator); + + if (typeof value === 'string') { + this.value = value.trim(); + } else if (value) { + this.value = value; + } else { + this.value = ''; + } + + this.isVariable = isVariable; + this._index = index; + this._fileInfo = currentFileInfo; + this.copyVisibilityInfo(visibilityInfo); + this.setParent(this.combinator, this); + } + + accept(visitor) { + const value = this.value; + this.combinator = visitor.visit(this.combinator); + + if (typeof value === 'object') { + this.value = visitor.visit(value); + } + } + + eval(context) { + return new Element(this.combinator, this.value.eval ? this.value.eval(context) : this.value, this.isVariable, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + + clone() { + return new Element(this.combinator, this.value, this.isVariable, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + + genCSS(context, output) { + output.add(this.toCSS(context), this.fileInfo(), this.getIndex()); + } + + toCSS(context = {}) { + let value = this.value; + const firstSelector = context.firstSelector; + + if (value instanceof Paren) { + // selector in parens should not be affected by outer selector + // flags (breaks only interpolated selectors - see #1973) + context.firstSelector = true; + } + + value = value.toCSS ? value.toCSS(context) : value; + context.firstSelector = firstSelector; + + if (value === '' && this.combinator.value.charAt(0) === '&') { + return ''; + } else { + return this.combinator.toCSS(context) + value; + } + } + +} + +Element.prototype.type = 'Element'; + +const Math$1 = { + ALWAYS: 0, + PARENS_DIVISION: 1, + PARENS: 2, + STRICT_LEGACY: 3 +}; +const RewriteUrls = { + OFF: 0, + LOCAL: 1, + ALL: 2 +}; + +/* jshint proto: true */ +function getLocation(index, inputStream) { + let n = index + 1; + let line = null; + let column = -1; + + while (--n >= 0 && inputStream.charAt(n) !== '\n') { + column++; + } + + if (typeof index === 'number') { + line = (inputStream.slice(0, index).match(/\n/g) || '').length; + } + + return { + line, + column + }; +} +function copyArray(arr) { + let i; + const length = arr.length; + const copy = new Array(length); + + for (i = 0; i < length; i++) { + copy[i] = arr[i]; + } + + return copy; +} +function clone(obj) { + const cloned = {}; + + for (const prop in obj) { + if (obj.hasOwnProperty(prop)) { + cloned[prop] = obj[prop]; + } + } + + return cloned; +} +function copyOptions(obj1, obj2) { + if (obj2 && obj2._defaults) { + return obj2; + } + + const opts = utils.defaults(obj1, obj2); + + if (opts.strictMath) { + opts.math = Math$1.STRICT_LEGACY; + } // Back compat with changed relativeUrls option + + + if (opts.relativeUrls) { + opts.rewriteUrls = RewriteUrls.ALL; + } + + if (typeof opts.math === 'string') { + switch (opts.math.toLowerCase()) { + case 'always': + opts.math = Math$1.ALWAYS; + break; + + case 'parens-division': + opts.math = Math$1.PARENS_DIVISION; + break; + + case 'strict': + case 'parens': + opts.math = Math$1.PARENS; + break; + + case 'strict-legacy': + opts.math = Math$1.STRICT_LEGACY; + } + } + + if (typeof opts.rewriteUrls === 'string') { + switch (opts.rewriteUrls.toLowerCase()) { + case 'off': + opts.rewriteUrls = RewriteUrls.OFF; + break; + + case 'local': + opts.rewriteUrls = RewriteUrls.LOCAL; + break; + + case 'all': + opts.rewriteUrls = RewriteUrls.ALL; + break; + } + } + + return opts; +} +function defaults(obj1, obj2) { + let newObj = obj2 || {}; + + if (!obj2._defaults) { + newObj = {}; + const defaults = CloneHelper(obj1); + newObj._defaults = defaults; + const cloned = obj2 ? CloneHelper(obj2) : {}; + Object.assign(newObj, defaults, cloned); + } + + return newObj; +} +function merge(obj1, obj2) { + for (const prop in obj2) { + if (obj2.hasOwnProperty(prop)) { + obj1[prop] = obj2[prop]; + } + } + + return obj1; +} +function flattenArray(arr, result = []) { + for (let i = 0, length = arr.length; i < length; i++) { + const value = arr[i]; + + if (Array.isArray(value)) { + utils.flattenArray(value, result); + } else { + if (value !== undefined) { + result.push(value); + } + } + } + + return result; +} + +var utils$1 = /*#__PURE__*/Object.freeze({ + getLocation: getLocation, + copyArray: copyArray, + clone: clone, + copyOptions: copyOptions, + defaults: defaults, + merge: merge, + flattenArray: flattenArray +}); + +/** + * This is a centralized class of any error that could be thrown internally (mostly by the parser). + * Besides standard .message it keeps some additional data like a path to the file where the error + * occurred along with line and column numbers. + * + * @class + * @extends Error + * @type {module.LessError} + * + * @prop {string} type + * @prop {string} filename + * @prop {number} index + * @prop {number} line + * @prop {number} column + * @prop {number} callLine + * @prop {number} callExtract + * @prop {string[]} extract + * + * @param {Object} e - An error object to wrap around or just a descriptive object + * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager? + * @param {string} [currentFilename] + */ + +const LessError = function LessError(e, fileContentMap, currentFilename) { + Error.call(this); + const filename = e.filename || currentFilename; + this.message = e.message; + this.stack = e.stack; + + if (fileContentMap && filename) { + const input = fileContentMap.contents[filename]; + const loc = getLocation(e.index, input); + const line = loc.line; + const col = loc.column; + const callLine = e.call && getLocation(e.call, input).line; + const lines = input ? input.split('\n') : ''; + this.type = e.type || 'Syntax'; + this.filename = filename; + this.index = e.index; + this.line = typeof line === 'number' ? line + 1 : null; + this.column = col; + + if (!this.line && this.stack) { + const found = this.stack.match(/(|Function):(\d+):(\d+)/); + + if (found) { + if (found[2]) { + this.line = parseInt(found[2]) - 2; + } + + if (found[3]) { + this.column = parseInt(found[3]); + } + } + } + + this.callLine = callLine + 1; + this.callExtract = lines[callLine]; + this.extract = [lines[this.line - 2], lines[this.line - 1], lines[this.line]]; + } +}; + +if (typeof Object.create === 'undefined') { + const F = () => {}; + + F.prototype = Error.prototype; + LessError.prototype = new F(); +} else { + LessError.prototype = Object.create(Error.prototype); +} + +LessError.prototype.constructor = LessError; +/** + * An overridden version of the default Object.prototype.toString + * which uses additional information to create a helpful message. + * + * @param {Object} options + * @returns {string} + */ + +LessError.prototype.toString = function (options = {}) { + let message = ''; + const extract = this.extract || []; + let error = []; + + let stylize = str => str; + + if (options.stylize) { + const type = typeof options.stylize; + + if (type !== 'function') { + throw Error(`options.stylize should be a function, got a ${type}!`); + } + + stylize = options.stylize; + } + + if (this.line !== null) { + if (typeof extract[0] === 'string') { + error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey')); + } + + if (typeof extract[1] === 'string') { + let errorTxt = `${this.line} `; + + if (extract[1]) { + errorTxt += extract[1].slice(0, this.column) + stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') + extract[1].slice(this.column + 1), 'red'), 'inverse'); + } + + error.push(errorTxt); + } + + if (typeof extract[2] === 'string') { + error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey')); + } + + error = `${error.join('\n') + stylize('', 'reset')}\n`; + } + + message += stylize(`${this.type}Error: ${this.message}`, 'red'); + + if (this.filename) { + message += stylize(' in ', 'red') + this.filename; + } + + if (this.line) { + message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey'); + } + + message += `\n${error}`; + + if (this.callLine) { + message += `${stylize('from ', 'red') + (this.filename || '')}/n`; + message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`; + } + + return message; +}; + +class Selector extends Node { + constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) { + this.extendList = extendList; + this.condition = condition; + this.evaldCondition = !condition; + this._index = index; + this._fileInfo = currentFileInfo; + this.elements = this.getElements(elements); + this.mixinElements_ = undefined; + this.copyVisibilityInfo(visibilityInfo); + this.setParent(this.elements, this); + } + + accept(visitor) { + if (this.elements) { + this.elements = visitor.visitArray(this.elements); + } + + if (this.extendList) { + this.extendList = visitor.visitArray(this.extendList); + } + + if (this.condition) { + this.condition = visitor.visit(this.condition); + } + } + + createDerived(elements, extendList, evaldCondition) { + elements = this.getElements(elements); + const newSelector = new Selector(elements, extendList || this.extendList, null, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + newSelector.evaldCondition = evaldCondition != null ? evaldCondition : this.evaldCondition; + newSelector.mediaEmpty = this.mediaEmpty; + return newSelector; + } + + getElements(els) { + if (!els) { + return [new Element('', '&', false, this._index, this._fileInfo)]; + } + + if (typeof els === 'string') { + this.parse.parseNode(els, ['selector'], this._index, this._fileInfo, function (err, result) { + if (err) { + throw new LessError({ + index: err.index, + message: err.message + }, this.parse.imports, this._fileInfo.filename); + } + + els = result[0].elements; + }); + } + + return els; + } + + createEmptySelectors() { + const el = new Element('', '&', false, this._index, this._fileInfo); + const sels = [new Selector([el], null, null, this._index, this._fileInfo)]; + sels[0].mediaEmpty = true; + return sels; + } + + match(other) { + const elements = this.elements; + const len = elements.length; + let olen; + let i; + other = other.mixinElements(); + olen = other.length; + + if (olen === 0 || len < olen) { + return 0; + } else { + for (i = 0; i < olen; i++) { + if (elements[i].value !== other[i]) { + return 0; + } + } + } + + return olen; // return number of matched elements + } + + mixinElements() { + if (this.mixinElements_) { + return this.mixinElements_; + } + + let elements = this.elements.map(v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\*\.\w-]([\w-]|(\\.))*/g); + + if (elements) { + if (elements[0] === '&') { + elements.shift(); + } + } else { + elements = []; + } + + return this.mixinElements_ = elements; + } + + isJustParentSelector() { + return !this.mediaEmpty && this.elements.length === 1 && this.elements[0].value === '&' && (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === ''); + } + + eval(context) { + const evaldCondition = this.condition && this.condition.eval(context); + let elements = this.elements; + let extendList = this.extendList; + elements = elements && elements.map(e => e.eval(context)); + extendList = extendList && extendList.map(extend => extend.eval(context)); + return this.createDerived(elements, extendList, evaldCondition); + } + + genCSS(context, output) { + let i; + let element; + + if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') { + output.add(' ', this.fileInfo(), this.getIndex()); + } + + for (i = 0; i < this.elements.length; i++) { + element = this.elements[i]; + element.genCSS(context, output); + } + } + + getIsOutput() { + return this.evaldCondition; + } + +} + +Selector.prototype.type = 'Selector'; + +class Value extends Node { + constructor(value) { + if (!value) { + throw new Error('Value requires an array argument'); + } + + if (!Array.isArray(value)) { + this.value = [value]; + } else { + this.value = value; + } + } + + accept(visitor) { + if (this.value) { + this.value = visitor.visitArray(this.value); + } + } + + eval(context) { + if (this.value.length === 1) { + return this.value[0].eval(context); + } else { + return new Value(this.value.map(v => v.eval(context))); + } + } + + genCSS(context, output) { + let i; + + for (i = 0; i < this.value.length; i++) { + this.value[i].genCSS(context, output); + + if (i + 1 < this.value.length) { + output.add(context && context.compress ? ',' : ', '); + } + } + } + +} + +Value.prototype.type = 'Value'; + +class Keyword extends Node { + constructor(value) { + this.value = value; + } + + genCSS(context, output) { + if (this.value === '%') { + throw { + type: 'Syntax', + message: 'Invalid % without number' + }; + } + + output.add(this.value); + } + +} + +Keyword.prototype.type = 'Keyword'; +Keyword.True = new Keyword('true'); +Keyword.False = new Keyword('false'); + +class Anonymous extends Node { + constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) { + this.value = value; + this._index = index; + this._fileInfo = currentFileInfo; + this.mapLines = mapLines; + this.rulesetLike = typeof rulesetLike === 'undefined' ? false : rulesetLike; + this.allowRoot = true; + this.copyVisibilityInfo(visibilityInfo); + } + + eval() { + return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo()); + } + + compare(other) { + return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; + } + + isRulesetLike() { + return this.rulesetLike; + } + + genCSS(context, output) { + this.nodeVisible = Boolean(this.value); + + if (this.nodeVisible) { + output.add(this.value, this._fileInfo, this._index, this.mapLines); + } + } + +} + +Anonymous.prototype.type = 'Anonymous'; + +const MATH = Math$1; + +class Declaration extends Node { + constructor(name, value, important, merge, index, currentFileInfo, inline, variable) { + this.name = name; + this.value = value instanceof Node ? value : new Value([value ? new Anonymous(value) : null]); + this.important = important ? ` ${important.trim()}` : ''; + this.merge = merge; + this._index = index; + this._fileInfo = currentFileInfo; + this.inline = inline || false; + this.variable = variable !== undefined ? variable : name.charAt && name.charAt(0) === '@'; + this.allowRoot = true; + this.setParent(this.value, this); + } + + genCSS(context, output) { + output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex()); + + try { + this.value.genCSS(context, output); + } catch (e) { + e.index = this._index; + e.filename = this._fileInfo.filename; + throw e; + } + + output.add(this.important + (this.inline || context.lastRule && context.compress ? '' : ';'), this._fileInfo, this._index); + } + + eval(context) { + let mathBypass = false; + let prevMath; + let name = this.name; + let evaldValue; + let variable = this.variable; + + if (typeof name !== 'string') { + // expand 'primitive' name directly to get + // things faster (~10% for benchmark.less): + name = name.length === 1 && name[0] instanceof Keyword ? name[0].value : evalName(context, name); + variable = false; // never treat expanded interpolation as new variable name + } // @todo remove when parens-division is default + + + if (name === 'font' && context.math === MATH.ALWAYS) { + mathBypass = true; + prevMath = context.math; + context.math = MATH.PARENS_DIVISION; + } + + try { + context.importantScope.push({}); + evaldValue = this.value.eval(context); + + if (!this.variable && evaldValue.type === 'DetachedRuleset') { + throw { + message: 'Rulesets cannot be evaluated on a property.', + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } + + let important = this.important; + const importantResult = context.importantScope.pop(); + + if (!important && importantResult.important) { + important = importantResult.important; + } + + return new Declaration(name, evaldValue, important, this.merge, this.getIndex(), this.fileInfo(), this.inline, variable); + } catch (e) { + if (typeof e.index !== 'number') { + e.index = this.getIndex(); + e.filename = this.fileInfo().filename; + } + + throw e; + } finally { + if (mathBypass) { + context.math = prevMath; + } + } + } + + makeImportant() { + return new Declaration(this.name, this.value, '!important', this.merge, this.getIndex(), this.fileInfo(), this.inline); + } + +} + +function evalName(context, name) { + let value = ''; + let i; + const n = name.length; + const output = { + add: function add(s) { + value += s; + } + }; + + for (i = 0; i < n; i++) { + name[i].eval(context).genCSS(context, output); + } + + return value; +} + +Declaration.prototype.type = 'Declaration'; + +const debugInfo = (context, ctx, lineSeparator) => { + let result = ''; + + if (context.dumpLineNumbers && !context.compress) { + switch (context.dumpLineNumbers) { + case 'comments': + result = debugInfo.asComment(ctx); + break; + + case 'mediaquery': + result = debugInfo.asMediaQuery(ctx); + break; + + case 'all': + result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx); + break; + } + } + + return result; +}; + +debugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\n`; + +debugInfo.asMediaQuery = ctx => { + let filenameWithProtocol = ctx.debugInfo.fileName; + + if (!/^[a-z]+:\/\//i.test(filenameWithProtocol)) { + filenameWithProtocol = `file://${filenameWithProtocol}`; + } + + return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\/\\])/g, a => { + if (a == '\\') { + a = '\/'; + } + + return `\\${a}`; + })}}line{font-family:\\00003${ctx.debugInfo.lineNumber}}}\n`; +}; + +class Comment extends Node { + constructor(value, isLineComment, index, currentFileInfo) { + this.value = value; + this.isLineComment = isLineComment; + this._index = index; + this._fileInfo = currentFileInfo; + this.allowRoot = true; + } + + genCSS(context, output) { + if (this.debugInfo) { + output.add(debugInfo(context, this), this.fileInfo(), this.getIndex()); + } + + output.add(this.value); + } + + isSilent(context) { + const isCompressed = context.compress && this.value[2] !== '!'; + return this.isLineComment || isCompressed; + } + +} + +Comment.prototype.type = 'Comment'; + +const contexts = {}; + +const copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) { + if (!original) { + return; + } + + for (let i = 0; i < propertiesToCopy.length; i++) { + if (original.hasOwnProperty(propertiesToCopy[i])) { + destination[propertiesToCopy[i]] = original[propertiesToCopy[i]]; + } + } +}; +/* + parse is used whilst parsing + */ + + +const parseCopyProperties = [// options +'paths', // option - unmodified - paths to search for imports on +'rewriteUrls', // option - whether to adjust URL's to be relative +'rootpath', // option - rootpath to append to URL's +'strictImports', // option - +'insecure', // option - whether to allow imports from insecure ssl hosts +'dumpLineNumbers', // option - whether to dump line numbers +'compress', // option - whether to compress +'syncImport', // option - whether to import synchronously +'chunkInput', // option - whether to chunk input. more performant but causes parse issues. +'mime', // browser only - mime type for sheet import +'useFileCache', // browser only - whether to use the per file session cache +// context +'processImports', // option & context - whether to process imports. if false then imports will not be imported. +// Used by the import manager to stop multiple import visitors being created. +'pluginManager' // Used as the plugin manager for the session +]; + +contexts.Parse = function (options) { + copyFromOriginal(options, this, parseCopyProperties); + + if (typeof this.paths === 'string') { + this.paths = [this.paths]; + } +}; + +const evalCopyProperties = ['paths', // additional include paths +'compress', // whether to compress +'ieCompat', // whether to enforce IE compatibility (IE8 data-uri) +'math', // whether math has to be within parenthesis +'strictUnits', // whether units need to evaluate correctly +'sourceMap', // whether to output a source map +'importMultiple', // whether we are currently importing multiple copies +'urlArgs', // whether to add args into url tokens +'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false +'pluginManager', // Used as the plugin manager for the session +'importantScope', // used to bubble up !important statements +'rewriteUrls' // option - whether to adjust URL's to be relative +]; + +contexts.Eval = function (options, frames) { + copyFromOriginal(options, this, evalCopyProperties); + + if (typeof this.paths === 'string') { + this.paths = [this.paths]; + } + + this.frames = frames || []; + this.importantScope = this.importantScope || []; +}; + +contexts.Eval.prototype.enterCalc = function () { + if (!this.calcStack) { + this.calcStack = []; + } + + this.calcStack.push(true); + this.inCalc = true; +}; + +contexts.Eval.prototype.exitCalc = function () { + this.calcStack.pop(); + + if (!this.calcStack) { + this.inCalc = false; + } +}; + +contexts.Eval.prototype.inParenthesis = function () { + if (!this.parensStack) { + this.parensStack = []; + } + + this.parensStack.push(true); +}; + +contexts.Eval.prototype.outOfParenthesis = function () { + this.parensStack.pop(); +}; + +contexts.Eval.prototype.inCalc = false; +contexts.Eval.prototype.mathOn = true; + +contexts.Eval.prototype.isMathOn = function (op) { + if (!this.mathOn) { + return false; + } + + if (op === '/' && this.math !== Math$1.ALWAYS && (!this.parensStack || !this.parensStack.length)) { + return false; + } + + if (this.math > Math$1.PARENS_DIVISION) { + return this.parensStack && this.parensStack.length; + } + + return true; +}; + +contexts.Eval.prototype.pathRequiresRewrite = function (path) { + const isRelative = this.rewriteUrls === RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; + return isRelative(path); +}; + +contexts.Eval.prototype.rewritePath = function (path, rootpath) { + let newPath; + rootpath = rootpath || ''; + newPath = this.normalizePath(rootpath + path); // If a path was explicit relative and the rootpath was not an absolute path + // we must ensure that the new path is also explicit relative. + + if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { + newPath = `./${newPath}`; + } + + return newPath; +}; + +contexts.Eval.prototype.normalizePath = path => { + const segments = path.split('/').reverse(); + let segment; + path = []; + + while (segments.length !== 0) { + segment = segments.pop(); + + switch (segment) { + case '.': + break; + + case '..': + if (path.length === 0 || path[path.length - 1] === '..') { + path.push(segment); + } else { + path.pop(); + } + + break; + + default: + path.push(segment); + break; + } + } + + return path.join('/'); +}; + +function isPathRelative(path) { + return !/^(?:[a-z-]+:|\/|#)/i.test(path); +} + +function isPathLocalRelative(path) { + return path.charAt(0) === '.'; +} // todo - do the same for the toCSS ? + +function makeRegistry(base) { + return { + _data: {}, + add: function add(name, func) { + // precautionary case conversion, as later querying of + // the registry by function-caller uses lower case as well. + name = name.toLowerCase(); + + if (this._data.hasOwnProperty(name)) ; + + this._data[name] = func; + }, + addMultiple: function addMultiple(functions) { + Object.keys(functions).forEach(name => { + this.add(name, functions[name]); + }); + }, + get: function get(name) { + return this._data[name] || base && base.get(name); + }, + getLocalFunctions: function getLocalFunctions() { + return this._data; + }, + inherit: function inherit() { + return makeRegistry(this); + }, + create: function create(base) { + return makeRegistry(base); + } + }; +} + +var functionRegistry = makeRegistry(null); + +const defaultFunc = { + eval: function _eval() { + const v = this.value_; + const e = this.error_; + + if (e) { + throw e; + } + + if (v != null) { + return v ? Keyword.True : Keyword.False; + } + }, + value: function value(v) { + this.value_ = v; + }, + error: function error(e) { + this.error_ = e; + }, + reset: function reset() { + this.value_ = this.error_ = null; + } +}; +var defaultFunc$1 = { + 'default': defaultFunc.eval.bind(defaultFunc) +}; + +class Ruleset extends Node { + constructor(selectors, rules, strictImports, visibilityInfo) { + this.selectors = selectors; + this.rules = rules; + this._lookups = {}; + this._variables = null; + this._properties = null; + this.strictImports = strictImports; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + this.setParent(this.selectors, this); + this.setParent(this.rules, this); + } + + isRulesetLike() { + return true; + } + + accept(visitor) { + if (this.paths) { + this.paths = visitor.visitArray(this.paths, true); + } else if (this.selectors) { + this.selectors = visitor.visitArray(this.selectors); + } + + if (this.rules && this.rules.length) { + this.rules = visitor.visitArray(this.rules); + } + } + + eval(context) { + let selectors; + let selCnt; + let selector; + let i; + let hasVariable; + let hasOnePassingSelector = false; + + if (this.selectors && (selCnt = this.selectors.length)) { + selectors = new Array(selCnt); + defaultFunc$1.error({ + type: 'Syntax', + message: 'it is currently only allowed in parametric mixin guards,' + }); + + for (i = 0; i < selCnt; i++) { + selector = this.selectors[i].eval(context); + + for (var j = 0; j < selector.elements.length; j++) { + if (selector.elements[j].isVariable) { + hasVariable = true; + break; + } + } + + selectors[i] = selector; + + if (selector.evaldCondition) { + hasOnePassingSelector = true; + } + } + + if (hasVariable) { + const toParseSelectors = new Array(selCnt); + + for (i = 0; i < selCnt; i++) { + selector = selectors[i]; + toParseSelectors[i] = selector.toCSS(context); + } + + this.parse.parseNode(toParseSelectors.join(','), ["selectors"], selectors[0].getIndex(), selectors[0].fileInfo(), (err, result) => { + if (result) { + selectors = flattenArray(result); + } + }); + } + + defaultFunc$1.reset(); + } else { + hasOnePassingSelector = true; + } + + let rules = this.rules ? copyArray(this.rules) : null; + const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo()); + let rule; + let subRule; + ruleset.originalRuleset = this; + ruleset.root = this.root; + ruleset.firstRoot = this.firstRoot; + ruleset.allowImports = this.allowImports; + + if (this.debugInfo) { + ruleset.debugInfo = this.debugInfo; + } + + if (!hasOnePassingSelector) { + rules.length = 0; + } // inherit a function registry from the frames stack when possible; + // otherwise from the global registry + + + ruleset.functionRegistry = (frames => { + let i = 0; + const n = frames.length; + let found; + + for (; i !== n; ++i) { + found = frames[i].functionRegistry; + + if (found) { + return found; + } + } + + return functionRegistry; + })(context.frames).inherit(); // push the current ruleset to the frames stack + + + const ctxFrames = context.frames; + ctxFrames.unshift(ruleset); // currrent selectors + + let ctxSelectors = context.selectors; + + if (!ctxSelectors) { + context.selectors = ctxSelectors = []; + } + + ctxSelectors.unshift(this.selectors); // Evaluate imports + + if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) { + ruleset.evalImports(context); + } // Store the frames around mixin definitions, + // so they can be evaluated like closures when the time comes. + + + const rsRules = ruleset.rules; + + for (i = 0; rule = rsRules[i]; i++) { + if (rule.evalFirst) { + rsRules[i] = rule.eval(context); + } + } + + const mediaBlockCount = context.mediaBlocks && context.mediaBlocks.length || 0; // Evaluate mixin calls. + + for (i = 0; rule = rsRules[i]; i++) { + if (rule.type === 'MixinCall') { + /* jshint loopfunc:true */ + rules = rule.eval(context).filter(r => { + if (r instanceof Declaration && r.variable) { + // do not pollute the scope if the variable is + // already there. consider returning false here + // but we need a way to "return" variable from mixins + return !ruleset.variable(r.name); + } + + return true; + }); + rsRules.splice(...[i, 1].concat(rules)); + i += rules.length - 1; + ruleset.resetCache(); + } else if (rule.type === 'VariableCall') { + /* jshint loopfunc:true */ + rules = rule.eval(context).rules.filter(r => { + if (r instanceof Declaration && r.variable) { + // do not pollute the scope at all + return false; + } + + return true; + }); + rsRules.splice(...[i, 1].concat(rules)); + i += rules.length - 1; + ruleset.resetCache(); + } + } // Evaluate everything else + + + for (i = 0; rule = rsRules[i]; i++) { + if (!rule.evalFirst) { + rsRules[i] = rule = rule.eval ? rule.eval(context) : rule; + } + } // Evaluate everything else + + + for (i = 0; rule = rsRules[i]; i++) { + // for rulesets, check if it is a css guard and can be removed + if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) { + // check if it can be folded in (e.g. & where) + if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) { + rsRules.splice(i--, 1); + + for (var j = 0; subRule = rule.rules[j]; j++) { + if (subRule instanceof Node) { + subRule.copyVisibilityInfo(rule.visibilityInfo()); + + if (!(subRule instanceof Declaration) || !subRule.variable) { + rsRules.splice(++i, 0, subRule); + } + } + } + } + } + } // Pop the stack + + + ctxFrames.shift(); + ctxSelectors.shift(); + + if (context.mediaBlocks) { + for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) { + context.mediaBlocks[i].bubbleSelectors(selectors); + } + } + + return ruleset; + } + + evalImports(context) { + const rules = this.rules; + let i; + let importRules; + + if (!rules) { + return; + } + + for (i = 0; i < rules.length; i++) { + if (rules[i].type === 'Import') { + importRules = rules[i].eval(context); + + if (importRules && (importRules.length || importRules.length === 0)) { + rules.splice(...[i, 1].concat(importRules)); + i += importRules.length - 1; + } else { + rules.splice(i, 1, importRules); + } + + this.resetCache(); + } + } + } + + makeImportant() { + const result = new Ruleset(this.selectors, this.rules.map(r => { + if (r.makeImportant) { + return r.makeImportant(); + } else { + return r; + } + }), this.strictImports, this.visibilityInfo()); + return result; + } + + matchArgs(args) { + return !args || args.length === 0; + } // lets you call a css selector with a guard + + + matchCondition(args, context) { + const lastSelector = this.selectors[this.selectors.length - 1]; + + if (!lastSelector.evaldCondition) { + return false; + } + + if (lastSelector.condition && !lastSelector.condition.eval(new contexts.Eval(context, context.frames))) { + return false; + } + + return true; + } + + resetCache() { + this._rulesets = null; + this._variables = null; + this._properties = null; + this._lookups = {}; + } + + variables() { + if (!this._variables) { + this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => { + if (r instanceof Declaration && r.variable === true) { + hash[r.name] = r; + } // when evaluating variables in an import statement, imports have not been eval'd + // so we need to go inside import statements. + // guard against root being a string (in the case of inlined less) + + + if (r.type === 'Import' && r.root && r.root.variables) { + const vars = r.root.variables(); + + for (const name in vars) { + if (vars.hasOwnProperty(name)) { + hash[name] = r.root.variable(name); + } + } + } + + return hash; + }, {}); + } + + return this._variables; + } + + properties() { + if (!this._properties) { + this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => { + if (r instanceof Declaration && r.variable !== true) { + const name = r.name.length === 1 && r.name[0] instanceof Keyword ? r.name[0].value : r.name; // Properties don't overwrite as they can merge + + if (!hash[`$${name}`]) { + hash[`$${name}`] = [r]; + } else { + hash[`$${name}`].push(r); + } + } + + return hash; + }, {}); + } + + return this._properties; + } + + variable(name) { + const decl = this.variables()[name]; + + if (decl) { + return this.parseValue(decl); + } + } + + property(name) { + const decl = this.properties()[name]; + + if (decl) { + return this.parseValue(decl); + } + } + + lastDeclaration() { + for (let i = this.rules.length; i > 0; i--) { + const decl = this.rules[i - 1]; + + if (decl instanceof Declaration) { + return this.parseValue(decl); + } + } + } + + parseValue(toParse) { + const self = this; + + function transformDeclaration(decl) { + if (decl.value instanceof Anonymous && !decl.parsed) { + if (typeof decl.value.value === 'string') { + this.parse.parseNode(decl.value.value, ['value', 'important'], decl.value.getIndex(), decl.fileInfo(), (err, result) => { + if (err) { + decl.parsed = true; + } + + if (result) { + decl.value = result[0]; + decl.important = result[1] || ''; + decl.parsed = true; + } + }); + } else { + decl.parsed = true; + } + + return decl; + } else { + return decl; + } + } + + if (!Array.isArray(toParse)) { + return transformDeclaration.call(self, toParse); + } else { + const nodes = []; + toParse.forEach(n => { + nodes.push(transformDeclaration.call(self, n)); + }); + return nodes; + } + } + + rulesets() { + if (!this.rules) { + return []; + } + + const filtRules = []; + const rules = this.rules; + let i; + let rule; + + for (i = 0; rule = rules[i]; i++) { + if (rule.isRuleset) { + filtRules.push(rule); + } + } + + return filtRules; + } + + prependRule(rule) { + const rules = this.rules; + + if (rules) { + rules.unshift(rule); + } else { + this.rules = [rule]; + } + + this.setParent(rule, this); + } + + find(selector, self = this, filter) { + const rules = []; + let match; + let foundMixins; + const key = selector.toCSS(); + + if (key in this._lookups) { + return this._lookups[key]; + } + + this.rulesets().forEach(rule => { + if (rule !== self) { + for (let j = 0; j < rule.selectors.length; j++) { + match = selector.match(rule.selectors[j]); + + if (match) { + if (selector.elements.length > match) { + if (!filter || filter(rule)) { + foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter); + + for (let i = 0; i < foundMixins.length; ++i) { + foundMixins[i].path.push(rule); + } + + Array.prototype.push.apply(rules, foundMixins); + } + } else { + rules.push({ + rule, + path: [] + }); + } + + break; + } + } + } + }); + this._lookups[key] = rules; + return rules; + } + + genCSS(context, output) { + let i; + let j; + const charsetRuleNodes = []; + let ruleNodes = []; + let // Line number debugging + debugInfo$1; + let rule; + let path; + context.tabLevel = context.tabLevel || 0; + + if (!this.root) { + context.tabLevel++; + } + + const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' '); + const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' '); + let sep; + let charsetNodeIndex = 0; + let importNodeIndex = 0; + + for (i = 0; rule = this.rules[i]; i++) { + if (rule instanceof Comment) { + if (importNodeIndex === i) { + importNodeIndex++; + } + + ruleNodes.push(rule); + } else if (rule.isCharset && rule.isCharset()) { + ruleNodes.splice(charsetNodeIndex, 0, rule); + charsetNodeIndex++; + importNodeIndex++; + } else if (rule.type === 'Import') { + ruleNodes.splice(importNodeIndex, 0, rule); + importNodeIndex++; + } else { + ruleNodes.push(rule); + } + } + + ruleNodes = charsetRuleNodes.concat(ruleNodes); // If this is the root node, we don't render + // a selector, or {}. + + if (!this.root) { + debugInfo$1 = debugInfo(context, this, tabSetStr); + + if (debugInfo$1) { + output.add(debugInfo$1); + output.add(tabSetStr); + } + + const paths = this.paths; + const pathCnt = paths.length; + let pathSubCnt; + sep = context.compress ? ',' : `,\n${tabSetStr}`; + + for (i = 0; i < pathCnt; i++) { + path = paths[i]; + + if (!(pathSubCnt = path.length)) { + continue; + } + + if (i > 0) { + output.add(sep); + } + + context.firstSelector = true; + path[0].genCSS(context, output); + context.firstSelector = false; + + for (j = 1; j < pathSubCnt; j++) { + path[j].genCSS(context, output); + } + } + + output.add((context.compress ? '{' : ' {\n') + tabRuleStr); + } // Compile rules and rulesets + + + for (i = 0; rule = ruleNodes[i]; i++) { + if (i + 1 === ruleNodes.length) { + context.lastRule = true; + } + + const currentLastRule = context.lastRule; + + if (rule.isRulesetLike(rule)) { + context.lastRule = false; + } + + if (rule.genCSS) { + rule.genCSS(context, output); + } else if (rule.value) { + output.add(rule.value.toString()); + } + + context.lastRule = currentLastRule; + + if (!context.lastRule && rule.isVisible()) { + output.add(context.compress ? '' : `\n${tabRuleStr}`); + } else { + context.lastRule = false; + } + } + + if (!this.root) { + output.add(context.compress ? '}' : `\n${tabSetStr}}`); + context.tabLevel--; + } + + if (!output.isEmpty() && !context.compress && this.firstRoot) { + output.add('\n'); + } + } + + joinSelectors(paths, context, selectors) { + for (let s = 0; s < selectors.length; s++) { + this.joinSelector(paths, context, selectors[s]); + } + } + + joinSelector(paths, context, selector) { + function createParenthesis(elementsToPak, originalElement) { + let replacementParen; + let j; + + if (elementsToPak.length === 0) { + replacementParen = new Paren(elementsToPak[0]); + } else { + const insideParent = new Array(elementsToPak.length); + + for (j = 0; j < elementsToPak.length; j++) { + insideParent[j] = new Element(null, elementsToPak[j], originalElement.isVariable, originalElement._index, originalElement._fileInfo); + } + + replacementParen = new Paren(new Selector(insideParent)); + } + + return replacementParen; + } + + function createSelector(containedElement, originalElement) { + let element; + let selector; + element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo); + selector = new Selector([element]); + return selector; + } // joins selector path from `beginningPath` with selector path in `addPath` + // `replacedElement` contains element that is being replaced by `addPath` + // returns concatenated path + + + function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) { + let newSelectorPath; + let lastSelector; + let newJoinedSelector; // our new selector path + + newSelectorPath = []; // construct the joined selector - if & is the first thing this will be empty, + // if not newJoinedSelector will be the last set of elements in the selector + + if (beginningPath.length > 0) { + newSelectorPath = copyArray(beginningPath); + lastSelector = newSelectorPath.pop(); + newJoinedSelector = originalSelector.createDerived(copyArray(lastSelector.elements)); + } else { + newJoinedSelector = originalSelector.createDerived([]); + } + + if (addPath.length > 0) { + // /deep/ is a CSS4 selector - (removed, so should deprecate) + // that is valid without anything in front of it + // so if the & does not have a combinator that is "" or " " then + // and there is a combinator on the parent, then grab that. + // this also allows + a { & .b { .a & { ... though not sure why you would want to do that + let combinator = replacedElement.combinator; + const parentEl = addPath[0].elements[0]; + + if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) { + combinator = parentEl.combinator; + } // join the elements so far with the first part of the parent + + + newJoinedSelector.elements.push(new Element(combinator, parentEl.value, replacedElement.isVariable, replacedElement._index, replacedElement._fileInfo)); + newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1)); + } // now add the joined selector - but only if it is not empty + + + if (newJoinedSelector.elements.length !== 0) { + newSelectorPath.push(newJoinedSelector); + } // put together the parent selectors after the join (e.g. the rest of the parent) + + + if (addPath.length > 1) { + let restOfPath = addPath.slice(1); + restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, [])); + newSelectorPath = newSelectorPath.concat(restOfPath); + } + + return newSelectorPath; + } // joins selector path from `beginningPath` with every selector path in `addPaths` array + // `replacedElement` contains element that is being replaced by `addPath` + // returns array with all concatenated paths + + + function addAllReplacementsIntoPath(beginningPath, addPaths, replacedElement, originalSelector, result) { + let j; + + for (j = 0; j < beginningPath.length; j++) { + const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector); + result.push(newSelectorPath); + } + + return result; + } + + function mergeElementsOnToSelectors(elements, selectors) { + let i; + let sel; + + if (elements.length === 0) { + return; + } + + if (selectors.length === 0) { + selectors.push([new Selector(elements)]); + return; + } + + for (i = 0; sel = selectors[i]; i++) { + // if the previous thing in sel is a parent this needs to join on to it + if (sel.length > 0) { + sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements)); + } else { + sel.push(new Selector(elements)); + } + } + } // replace all parent selectors inside `inSelector` by content of `context` array + // resulting selectors are returned inside `paths` array + // returns true if `inSelector` contained at least one parent selector + + + function replaceParentSelector(paths, context, inSelector) { + // The paths are [[Selector]] + // The first list is a list of comma separated selectors + // The inner list is a list of inheritance separated selectors + // e.g. + // .a, .b { + // .c { + // } + // } + // == [[.a] [.c]] [[.b] [.c]] + // + let i; + let j; + let k; + let currentElements; + let newSelectors; + let selectorsMultiplied; + let sel; + let el; + let hadParentSelector = false; + let length; + let lastSelector; + + function findNestedSelector(element) { + let maybeSelector; + + if (!(element.value instanceof Paren)) { + return null; + } + + maybeSelector = element.value.value; + + if (!(maybeSelector instanceof Selector)) { + return null; + } + + return maybeSelector; + } // the elements from the current selector so far + + + currentElements = []; // the current list of new selectors to add to the path. + // We will build it up. We initiate it with one empty selector as we "multiply" the new selectors + // by the parents + + newSelectors = [[]]; + + for (i = 0; el = inSelector.elements[i]; i++) { + // non parent reference elements just get added + if (el.value !== '&') { + const nestedSelector = findNestedSelector(el); + + if (nestedSelector != null) { + // merge the current list of non parent selector elements + // on to the current list of selectors to add + mergeElementsOnToSelectors(currentElements, newSelectors); + const nestedPaths = []; + let replaced; + const replacedNewSelectors = []; + replaced = replaceParentSelector(nestedPaths, context, nestedSelector); + hadParentSelector = hadParentSelector || replaced; // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors + + for (k = 0; k < nestedPaths.length; k++) { + const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el); + addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors); + } + + newSelectors = replacedNewSelectors; + currentElements = []; + } else { + currentElements.push(el); + } + } else { + hadParentSelector = true; // the new list of selectors to add + + selectorsMultiplied = []; // merge the current list of non parent selector elements + // on to the current list of selectors to add + + mergeElementsOnToSelectors(currentElements, newSelectors); // loop through our current selectors + + for (j = 0; j < newSelectors.length; j++) { + sel = newSelectors[j]; // if we don't have any parent paths, the & might be in a mixin so that it can be used + // whether there are parents or not + + if (context.length === 0) { + // the combinator used on el should now be applied to the next element instead so that + // it is not lost + if (sel.length > 0) { + sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo)); + } + + selectorsMultiplied.push(sel); + } else { + // and the parent selectors + for (k = 0; k < context.length; k++) { + // We need to put the current selectors + // then join the last selector's elements on to the parents selectors + const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector); // add that to our new set of selectors + + selectorsMultiplied.push(newSelectorPath); + } + } + } // our new selectors has been multiplied, so reset the state + + + newSelectors = selectorsMultiplied; + currentElements = []; + } + } // if we have any elements left over (e.g. .a& .b == .b) + // add them on to all the current selectors + + + mergeElementsOnToSelectors(currentElements, newSelectors); + + for (i = 0; i < newSelectors.length; i++) { + length = newSelectors[i].length; + + if (length > 0) { + paths.push(newSelectors[i]); + lastSelector = newSelectors[i][length - 1]; + newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList); + } + } + + return hadParentSelector; + } + + function deriveSelector(visibilityInfo, deriveFrom) { + const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition); + newSelector.copyVisibilityInfo(visibilityInfo); + return newSelector; + } // joinSelector code follows + + + let i; + let newPaths; + let hadParentSelector; + newPaths = []; + hadParentSelector = replaceParentSelector(newPaths, context, selector); + + if (!hadParentSelector) { + if (context.length > 0) { + newPaths = []; + + for (i = 0; i < context.length; i++) { + const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo())); + concatenated.push(selector); + newPaths.push(concatenated); + } + } else { + newPaths = [[selector]]; + } + } + + for (i = 0; i < newPaths.length; i++) { + paths.push(newPaths[i]); + } + } + +} + +Ruleset.prototype.type = 'Ruleset'; +Ruleset.prototype.isRuleset = true; + +class AtRule extends Node { + constructor(name, value, rules, index, currentFileInfo, debugInfo, isRooted, visibilityInfo) { + let i; + this.name = name; + this.value = value instanceof Node ? value : value ? new Anonymous(value) : value; + + if (rules) { + if (Array.isArray(rules)) { + this.rules = rules; + } else { + this.rules = [rules]; + this.rules[0].selectors = new Selector([], null, null, index, currentFileInfo).createEmptySelectors(); + } + + for (i = 0; i < this.rules.length; i++) { + this.rules[i].allowImports = true; + } + + this.setParent(this.rules, this); + } + + this._index = index; + this._fileInfo = currentFileInfo; + this.debugInfo = debugInfo; + this.isRooted = isRooted || false; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + } + + accept(visitor) { + const value = this.value; + const rules = this.rules; + + if (rules) { + this.rules = visitor.visitArray(rules); + } + + if (value) { + this.value = visitor.visit(value); + } + } + + isRulesetLike() { + return this.rules || !this.isCharset(); + } + + isCharset() { + return '@charset' === this.name; + } + + genCSS(context, output) { + const value = this.value; + const rules = this.rules; + output.add(this.name, this.fileInfo(), this.getIndex()); + + if (value) { + output.add(' '); + value.genCSS(context, output); + } + + if (rules) { + this.outputRuleset(context, output, rules); + } else { + output.add(';'); + } + } + + eval(context) { + let mediaPathBackup; + let mediaBlocksBackup; + let value = this.value; + let rules = this.rules; // media stored inside other atrule should not bubble over it + // backpup media bubbling information + + mediaPathBackup = context.mediaPath; + mediaBlocksBackup = context.mediaBlocks; // deleted media bubbling information + + context.mediaPath = []; + context.mediaBlocks = []; + + if (value) { + value = value.eval(context); + } + + if (rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + rules = [rules[0].eval(context)]; + rules[0].root = true; + } // restore media bubbling information + + + context.mediaPath = mediaPathBackup; + context.mediaBlocks = mediaBlocksBackup; + return new AtRule(this.name, value, rules, this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo()); + } + + variable(name) { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.variable.call(this.rules[0], name); + } + } + + find(...args) { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.find.apply(this.rules[0], args); + } + } + + rulesets() { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.rulesets.apply(this.rules[0]); + } + } + + outputRuleset(context, output, rules) { + const ruleCnt = rules.length; + let i; + context.tabLevel = (context.tabLevel | 0) + 1; // Compressed + + if (context.compress) { + output.add('{'); + + for (i = 0; i < ruleCnt; i++) { + rules[i].genCSS(context, output); + } + + output.add('}'); + context.tabLevel--; + return; + } // Non-compressed + + + const tabSetStr = `\n${Array(context.tabLevel).join(' ')}`; + const tabRuleStr = `${tabSetStr} `; + + if (!ruleCnt) { + output.add(` {${tabSetStr}}`); + } else { + output.add(` {${tabRuleStr}`); + rules[0].genCSS(context, output); + + for (i = 1; i < ruleCnt; i++) { + output.add(tabRuleStr); + rules[i].genCSS(context, output); + } + + output.add(`${tabSetStr}}`); + } + + context.tabLevel--; + } + +} + +AtRule.prototype.type = 'AtRule'; + +class DetachedRuleset extends Node { + constructor(ruleset, frames) { + this.ruleset = ruleset; + this.frames = frames; + this.setParent(this.ruleset, this); + } + + accept(visitor) { + this.ruleset = visitor.visit(this.ruleset); + } + + eval(context) { + const frames = this.frames || copyArray(context.frames); + return new DetachedRuleset(this.ruleset, frames); + } + + callEval(context) { + return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context); + } + +} + +DetachedRuleset.prototype.type = 'DetachedRuleset'; +DetachedRuleset.prototype.evalFirst = true; + +class Unit extends Node { + constructor(numerator, denominator, backupUnit) { + this.numerator = numerator ? copyArray(numerator).sort() : []; + this.denominator = denominator ? copyArray(denominator).sort() : []; + + if (backupUnit) { + this.backupUnit = backupUnit; + } else if (numerator && numerator.length) { + this.backupUnit = numerator[0]; + } + } + + clone() { + return new Unit(copyArray(this.numerator), copyArray(this.denominator), this.backupUnit); + } + + genCSS(context, output) { + // Dimension checks the unit is singular and throws an error if in strict math mode. + const strictUnits = context && context.strictUnits; + + if (this.numerator.length === 1) { + output.add(this.numerator[0]); // the ideal situation + } else if (!strictUnits && this.backupUnit) { + output.add(this.backupUnit); + } else if (!strictUnits && this.denominator.length) { + output.add(this.denominator[0]); + } + } + + toString() { + let i; + let returnStr = this.numerator.join('*'); + + for (i = 0; i < this.denominator.length; i++) { + returnStr += `/${this.denominator[i]}`; + } + + return returnStr; + } + + compare(other) { + return this.is(other.toString()) ? 0 : undefined; + } + + is(unitString) { + return this.toString().toUpperCase() === unitString.toUpperCase(); + } + + isLength() { + return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS()); + } + + isEmpty() { + return this.numerator.length === 0 && this.denominator.length === 0; + } + + isSingular() { + return this.numerator.length <= 1 && this.denominator.length === 0; + } + + map(callback) { + let i; + + for (i = 0; i < this.numerator.length; i++) { + this.numerator[i] = callback(this.numerator[i], false); + } + + for (i = 0; i < this.denominator.length; i++) { + this.denominator[i] = callback(this.denominator[i], true); + } + } + + usedUnits() { + let group; + const result = {}; + let mapUnit; + let groupName; + + mapUnit = atomicUnit => { + /* jshint loopfunc:true */ + if (group.hasOwnProperty(atomicUnit) && !result[groupName]) { + result[groupName] = atomicUnit; + } + + return atomicUnit; + }; + + for (groupName in unitConversions) { + if (unitConversions.hasOwnProperty(groupName)) { + group = unitConversions[groupName]; + this.map(mapUnit); + } + } + + return result; + } + + cancel() { + const counter = {}; + let atomicUnit; + let i; + + for (i = 0; i < this.numerator.length; i++) { + atomicUnit = this.numerator[i]; + counter[atomicUnit] = (counter[atomicUnit] || 0) + 1; + } + + for (i = 0; i < this.denominator.length; i++) { + atomicUnit = this.denominator[i]; + counter[atomicUnit] = (counter[atomicUnit] || 0) - 1; + } + + this.numerator = []; + this.denominator = []; + + for (atomicUnit in counter) { + if (counter.hasOwnProperty(atomicUnit)) { + const count = counter[atomicUnit]; + + if (count > 0) { + for (i = 0; i < count; i++) { + this.numerator.push(atomicUnit); + } + } else if (count < 0) { + for (i = 0; i < -count; i++) { + this.denominator.push(atomicUnit); + } + } + } + } + + this.numerator.sort(); + this.denominator.sort(); + } + +} + +Unit.prototype.type = 'Unit'; + +// A number with a unit +// + +class Dimension extends Node { + constructor(value, unit) { + this.value = parseFloat(value); + + if (isNaN(this.value)) { + throw new Error('Dimension is not a number.'); + } + + this.unit = unit && unit instanceof Unit ? unit : new Unit(unit ? [unit] : undefined); + this.setParent(this.unit, this); + } + + accept(visitor) { + this.unit = visitor.visit(this.unit); + } + + eval(context) { + return this; + } + + toColor() { + return new Color([this.value, this.value, this.value]); + } + + genCSS(context, output) { + if (context && context.strictUnits && !this.unit.isSingular()) { + throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`); + } + + const value = this.fround(context, this.value); + let strValue = String(value); + + if (value !== 0 && value < 0.000001 && value > -0.000001) { + // would be output 1e-6 etc. + strValue = value.toFixed(20).replace(/0+$/, ''); + } + + if (context && context.compress) { + // Zero values doesn't need a unit + if (value === 0 && this.unit.isLength()) { + output.add(strValue); + return; + } // Float values doesn't need a leading zero + + + if (value > 0 && value < 1) { + strValue = strValue.substr(1); + } + } + + output.add(strValue); + this.unit.genCSS(context, output); + } // In an operation between two Dimensions, + // we default to the first Dimension's unit, + // so `1px + 2` will yield `3px`. + + + operate(context, op, other) { + /* jshint noempty:false */ + let value = this._operate(context, op, this.value, other.value); + + let unit = this.unit.clone(); + + if (op === '+' || op === '-') { + if (unit.numerator.length === 0 && unit.denominator.length === 0) { + unit = other.unit.clone(); + + if (this.unit.backupUnit) { + unit.backupUnit = this.unit.backupUnit; + } + } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) ; else { + other = other.convertTo(this.unit.usedUnits()); + + if (context.strictUnits && other.unit.toString() !== unit.toString()) { + throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`); + } + + value = this._operate(context, op, this.value, other.value); + } + } else if (op === '*') { + unit.numerator = unit.numerator.concat(other.unit.numerator).sort(); + unit.denominator = unit.denominator.concat(other.unit.denominator).sort(); + unit.cancel(); + } else if (op === '/') { + unit.numerator = unit.numerator.concat(other.unit.denominator).sort(); + unit.denominator = unit.denominator.concat(other.unit.numerator).sort(); + unit.cancel(); + } + + return new Dimension(value, unit); + } + + compare(other) { + let a; + let b; + + if (!(other instanceof Dimension)) { + return undefined; + } + + if (this.unit.isEmpty() || other.unit.isEmpty()) { + a = this; + b = other; + } else { + a = this.unify(); + b = other.unify(); + + if (a.unit.compare(b.unit) !== 0) { + return undefined; + } + } + + return Node.numericCompare(a.value, b.value); + } + + unify() { + return this.convertTo({ + length: 'px', + duration: 's', + angle: 'rad' + }); + } + + convertTo(conversions) { + let value = this.value; + const unit = this.unit.clone(); + let i; + let groupName; + let group; + let targetUnit; + let derivedConversions = {}; + let applyUnit; + + if (typeof conversions === 'string') { + for (i in unitConversions) { + if (unitConversions[i].hasOwnProperty(conversions)) { + derivedConversions = {}; + derivedConversions[i] = conversions; + } + } + + conversions = derivedConversions; + } + + applyUnit = (atomicUnit, denominator) => { + /* jshint loopfunc:true */ + if (group.hasOwnProperty(atomicUnit)) { + if (denominator) { + value = value / (group[atomicUnit] / group[targetUnit]); + } else { + value = value * (group[atomicUnit] / group[targetUnit]); + } + + return targetUnit; + } + + return atomicUnit; + }; + + for (groupName in conversions) { + if (conversions.hasOwnProperty(groupName)) { + targetUnit = conversions[groupName]; + group = unitConversions[groupName]; + unit.map(applyUnit); + } + } + + unit.cancel(); + return new Dimension(value, unit); + } + +} + +Dimension.prototype.type = 'Dimension'; + +const MATH$1 = Math$1; + +class Operation extends Node { + constructor(op, operands, isSpaced) { + this.op = op.trim(); + this.operands = operands; + this.isSpaced = isSpaced; + } + + accept(visitor) { + this.operands = visitor.visitArray(this.operands); + } + + eval(context) { + let a = this.operands[0].eval(context); + let b = this.operands[1].eval(context); + let op; + + if (context.isMathOn(this.op)) { + op = this.op === './' ? '/' : this.op; + + if (a instanceof Dimension && b instanceof Color) { + a = a.toColor(); + } + + if (b instanceof Dimension && a instanceof Color) { + b = b.toColor(); + } + + if (!a.operate) { + if (a instanceof Operation && a.op === '/' && context.math === MATH$1.PARENS_DIVISION) { + return new Operation(this.op, [a, b], this.isSpaced); + } + + throw { + type: 'Operation', + message: 'Operation on an invalid type' + }; + } + + return a.operate(context, op, b); + } else { + return new Operation(this.op, [a, b], this.isSpaced); + } + } + + genCSS(context, output) { + this.operands[0].genCSS(context, output); + + if (this.isSpaced) { + output.add(' '); + } + + output.add(this.op); + + if (this.isSpaced) { + output.add(' '); + } + + this.operands[1].genCSS(context, output); + } + +} + +Operation.prototype.type = 'Operation'; + +const MATH$2 = Math$1; + +class Expression extends Node { + constructor(value, noSpacing) { + this.value = value; + this.noSpacing = noSpacing; + + if (!value) { + throw new Error('Expression requires an array parameter'); + } + } + + accept(visitor) { + this.value = visitor.visitArray(this.value); + } + + eval(context) { + let returnValue; + const mathOn = context.isMathOn(); + const inParenthesis = this.parens && (context.math !== MATH$2.STRICT_LEGACY || !this.parensInOp); + let doubleParen = false; + + if (inParenthesis) { + context.inParenthesis(); + } + + if (this.value.length > 1) { + returnValue = new Expression(this.value.map(e => { + if (!e.eval) { + return e; + } + + return e.eval(context); + }), this.noSpacing); + } else if (this.value.length === 1) { + if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) { + doubleParen = true; + } + + returnValue = this.value[0].eval(context); + } else { + returnValue = this; + } + + if (inParenthesis) { + context.outOfParenthesis(); + } + + if (this.parens && this.parensInOp && !mathOn && !doubleParen && !(returnValue instanceof Dimension)) { + returnValue = new Paren(returnValue); + } + + return returnValue; + } + + genCSS(context, output) { + for (let i = 0; i < this.value.length; i++) { + this.value[i].genCSS(context, output); + + if (!this.noSpacing && i + 1 < this.value.length) { + output.add(' '); + } + } + } + + throwAwayComments() { + this.value = this.value.filter(v => !(v instanceof Comment)); + } + +} + +Expression.prototype.type = 'Expression'; + +class functionCaller { + constructor(name, context, index, currentFileInfo) { + this.name = name.toLowerCase(); + this.index = index; + this.context = context; + this.currentFileInfo = currentFileInfo; + this.func = context.frames[0].functionRegistry.get(this.name); + } + + isValid() { + return Boolean(this.func); + } + + call(args) { + // This code is terrible and should be replaced as per this issue... + // https://github.com/less/less.js/issues/2477 + if (Array.isArray(args)) { + args = args.filter(item => { + if (item.type === 'Comment') { + return false; + } + + return true; + }).map(item => { + if (item.type === 'Expression') { + const subNodes = item.value.filter(item => { + if (item.type === 'Comment') { + return false; + } + + return true; + }); + + if (subNodes.length === 1) { + return subNodes[0]; + } else { + return new Expression(subNodes); + } + } + + return item; + }); + } + + return this.func(...args); + } + +} + +// A function call node. +// + +class Call extends Node { + constructor(name, args, index, currentFileInfo) { + this.name = name; + this.args = args; + this.calc = name === 'calc'; + this._index = index; + this._fileInfo = currentFileInfo; + } + + accept(visitor) { + if (this.args) { + this.args = visitor.visitArray(this.args); + } + } // + // When evaluating a function call, + // we either find the function in the functionRegistry, + // in which case we call it, passing the evaluated arguments, + // if this returns null or we cannot find the function, we + // simply print it out as it appeared originally [2]. + // + // The reason why we evaluate the arguments, is in the case where + // we try to pass a variable to a function, like: `saturate(@color)`. + // The function should receive the value, not the variable. + // + + + eval(context) { + /** + * Turn off math for calc(), and switch back on for evaluating nested functions + */ + const currentMathContext = context.mathOn; + context.mathOn = !this.calc; + + if (this.calc || context.inCalc) { + context.enterCalc(); + } + + const args = this.args.map(a => a.eval(context)); + + if (this.calc || context.inCalc) { + context.exitCalc(); + } + + context.mathOn = currentMathContext; + let result; + const funcCaller = new functionCaller(this.name, context, this.getIndex(), this.fileInfo()); + + if (funcCaller.isValid()) { + try { + result = funcCaller.call(args); + } catch (e) { + throw { + type: e.type || 'Runtime', + message: `error evaluating function \`${this.name}\`${e.message ? `: ${e.message}` : ''}`, + index: this.getIndex(), + filename: this.fileInfo().filename, + line: e.lineNumber, + column: e.columnNumber + }; + } + + if (result !== null && result !== undefined) { + // Results that that are not nodes are cast as Anonymous nodes + // Falsy values or booleans are returned as empty nodes + if (!(result instanceof Node)) { + if (!result || result === true) { + result = new Anonymous(null); + } else { + result = new Anonymous(result.toString()); + } + } + + result._index = this._index; + result._fileInfo = this._fileInfo; + return result; + } + } + + return new Call(this.name, args, this.getIndex(), this.fileInfo()); + } + + genCSS(context, output) { + output.add(`${this.name}(`, this.fileInfo(), this.getIndex()); + + for (let i = 0; i < this.args.length; i++) { + this.args[i].genCSS(context, output); + + if (i + 1 < this.args.length) { + output.add(', '); + } + } + + output.add(')'); + } + +} + +Call.prototype.type = 'Call'; + +class Variable extends Node { + constructor(name, index, currentFileInfo) { + this.name = name; + this._index = index; + this._fileInfo = currentFileInfo; + } + + eval(context) { + let variable; + let name = this.name; + + if (name.indexOf('@@') === 0) { + name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`; + } + + if (this.evaluating) { + throw { + type: 'Name', + message: `Recursive variable definition for ${name}`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + this.evaluating = true; + variable = this.find(context.frames, frame => { + const v = frame.variable(name); + + if (v) { + if (v.important) { + const importantScope = context.importantScope[context.importantScope.length - 1]; + importantScope.important = v.important; + } // If in calc, wrap vars in a function call to cascade evaluate args first + + + if (context.inCalc) { + return new Call('_SELF', [v.value]).eval(context); + } else { + return v.value.eval(context); + } + } + }); + + if (variable) { + this.evaluating = false; + return variable; + } else { + throw { + type: 'Name', + message: `variable ${name} is undefined`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + } + + find(obj, fun) { + for (let i = 0, r; i < obj.length; i++) { + r = fun.call(obj, obj[i]); + + if (r) { + return r; + } + } + + return null; + } + +} + +Variable.prototype.type = 'Variable'; + +class Property extends Node { + constructor(name, index, currentFileInfo) { + this.name = name; + this._index = index; + this._fileInfo = currentFileInfo; + } + + eval(context) { + let property; + const name = this.name; // TODO: shorten this reference + + const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules; + + if (this.evaluating) { + throw { + type: 'Name', + message: `Recursive property reference for ${name}`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + this.evaluating = true; + property = this.find(context.frames, frame => { + let v; + const vArr = frame.property(name); + + if (vArr) { + for (let i = 0; i < vArr.length; i++) { + v = vArr[i]; + vArr[i] = new Declaration(v.name, v.value, v.important, v.merge, v.index, v.currentFileInfo, v.inline, v.variable); + } + + mergeRules(vArr); + v = vArr[vArr.length - 1]; + + if (v.important) { + const importantScope = context.importantScope[context.importantScope.length - 1]; + importantScope.important = v.important; + } + + v = v.value.eval(context); + return v; + } + }); + + if (property) { + this.evaluating = false; + return property; + } else { + throw { + type: 'Name', + message: `Property '${name}' is undefined`, + filename: this.currentFileInfo.filename, + index: this.index + }; + } + } + + find(obj, fun) { + for (let i = 0, r; i < obj.length; i++) { + r = fun.call(obj, obj[i]); + + if (r) { + return r; + } + } + + return null; + } + +} + +Property.prototype.type = 'Property'; + +class Attribute extends Node { + constructor(key, op, value) { + this.key = key; + this.op = op; + this.value = value; + } + + eval(context) { + return new Attribute(this.key.eval ? this.key.eval(context) : this.key, this.op, this.value && this.value.eval ? this.value.eval(context) : this.value); + } + + genCSS(context, output) { + output.add(this.toCSS(context)); + } + + toCSS(context) { + let value = this.key.toCSS ? this.key.toCSS(context) : this.key; + + if (this.op) { + value += this.op; + value += this.value.toCSS ? this.value.toCSS(context) : this.value; + } + + return `[${value}]`; + } + +} + +Attribute.prototype.type = 'Attribute'; + +class Quoted extends Node { + constructor(str, content, escaped, index, currentFileInfo) { + this.escaped = escaped == null ? true : escaped; + this.value = content || ''; + this.quote = str.charAt(0); + this._index = index; + this._fileInfo = currentFileInfo; + this.variableRegex = /@\{([\w-]+)\}/g; + this.propRegex = /\$\{([\w-]+)\}/g; + } + + genCSS(context, output) { + if (!this.escaped) { + output.add(this.quote, this.fileInfo(), this.getIndex()); + } + + output.add(this.value); + + if (!this.escaped) { + output.add(this.quote); + } + } + + containsVariables() { + return this.value.match(this.variableRegex); + } + + eval(context) { + const that = this; + let value = this.value; + + const variableReplacement = (_, name) => { + const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true); + return v instanceof Quoted ? v.value : v.toCSS(); + }; + + const propertyReplacement = (_, name) => { + const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true); + return v instanceof Quoted ? v.value : v.toCSS(); + }; + + function iterativeReplace(value, regexp, replacementFnc) { + let evaluatedValue = value; + + do { + value = evaluatedValue.toString(); + evaluatedValue = value.replace(regexp, replacementFnc); + } while (value !== evaluatedValue); + + return evaluatedValue; + } + + value = iterativeReplace(value, this.variableRegex, variableReplacement); + value = iterativeReplace(value, this.propRegex, propertyReplacement); + return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo()); + } + + compare(other) { + // when comparing quoted strings allow the quote to differ + if (other.type === 'Quoted' && !this.escaped && !other.escaped) { + return Node.numericCompare(this.value, other.value); + } else { + return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; + } + } + +} + +Quoted.prototype.type = 'Quoted'; + +class URL extends Node { + constructor(val, index, currentFileInfo, isEvald) { + this.value = val; + this._index = index; + this._fileInfo = currentFileInfo; + this.isEvald = isEvald; + } + + accept(visitor) { + this.value = visitor.visit(this.value); + } + + genCSS(context, output) { + output.add('url('); + this.value.genCSS(context, output); + output.add(')'); + } + + eval(context) { + const val = this.value.eval(context); + let rootpath; + + if (!this.isEvald) { + // Add the rootpath if the URL requires a rewrite + rootpath = this.fileInfo() && this.fileInfo().rootpath; + + if (typeof rootpath === 'string' && typeof val.value === 'string' && context.pathRequiresRewrite(val.value)) { + if (!val.quote) { + rootpath = escapePath(rootpath); + } + + val.value = context.rewritePath(val.value, rootpath); + } else { + val.value = context.normalizePath(val.value); + } // Add url args if enabled + + + if (context.urlArgs) { + if (!val.value.match(/^\s*data:/)) { + const delimiter = val.value.indexOf('?') === -1 ? '?' : '&'; + const urlArgs = delimiter + context.urlArgs; + + if (val.value.indexOf('#') !== -1) { + val.value = val.value.replace('#', `${urlArgs}#`); + } else { + val.value += urlArgs; + } + } + } + } + + return new URL(val, this.getIndex(), this.fileInfo(), true); + } + +} + +URL.prototype.type = 'Url'; + +function escapePath(path) { + return path.replace(/[\(\)'"\s]/g, match => `\\${match}`); +} + +class Media extends AtRule { + constructor(value, features, index, currentFileInfo, visibilityInfo) { + this._index = index; + this._fileInfo = currentFileInfo; + const selectors = new Selector([], null, null, this._index, this._fileInfo).createEmptySelectors(); + this.features = new Value(features); + this.rules = [new Ruleset(selectors, value)]; + this.rules[0].allowImports = true; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + this.setParent(selectors, this); + this.setParent(this.features, this); + this.setParent(this.rules, this); + } + + isRulesetLike() { + return true; + } + + accept(visitor) { + if (this.features) { + this.features = visitor.visit(this.features); + } + + if (this.rules) { + this.rules = visitor.visitArray(this.rules); + } + } + + genCSS(context, output) { + output.add('@media ', this._fileInfo, this._index); + this.features.genCSS(context, output); + this.outputRuleset(context, output, this.rules); + } + + eval(context) { + if (!context.mediaBlocks) { + context.mediaBlocks = []; + context.mediaPath = []; + } + + const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo()); + + if (this.debugInfo) { + this.rules[0].debugInfo = this.debugInfo; + media.debugInfo = this.debugInfo; + } + + media.features = this.features.eval(context); + context.mediaPath.push(media); + context.mediaBlocks.push(media); + this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit(); + context.frames.unshift(this.rules[0]); + media.rules = [this.rules[0].eval(context)]; + context.frames.shift(); + context.mediaPath.pop(); + return context.mediaPath.length === 0 ? media.evalTop(context) : media.evalNested(context); + } + + evalTop(context) { + let result = this; // Render all dependent Media blocks. + + if (context.mediaBlocks.length > 1) { + const selectors = new Selector([], null, null, this.getIndex(), this.fileInfo()).createEmptySelectors(); + result = new Ruleset(selectors, context.mediaBlocks); + result.multiMedia = true; + result.copyVisibilityInfo(this.visibilityInfo()); + this.setParent(result, this); + } + + delete context.mediaBlocks; + delete context.mediaPath; + return result; + } + + evalNested(context) { + let i; + let value; + const path = context.mediaPath.concat([this]); // Extract the media-query conditions separated with `,` (OR). + + for (i = 0; i < path.length; i++) { + value = path[i].features instanceof Value ? path[i].features.value : path[i].features; + path[i] = Array.isArray(value) ? value : [value]; + } // Trace all permutations to generate the resulting media-query. + // + // (a, b and c) with nested (d, e) -> + // a and d + // a and e + // b and c and d + // b and c and e + + + this.features = new Value(this.permute(path).map(path => { + path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment)); + + for (i = path.length - 1; i > 0; i--) { + path.splice(i, 0, new Anonymous('and')); + } + + return new Expression(path); + })); + this.setParent(this.features, this); // Fake a tree-node that doesn't output anything. + + return new Ruleset([], []); + } + + permute(arr) { + if (arr.length === 0) { + return []; + } else if (arr.length === 1) { + return arr[0]; + } else { + const result = []; + const rest = this.permute(arr.slice(1)); + + for (let i = 0; i < rest.length; i++) { + for (let j = 0; j < arr[0].length; j++) { + result.push([arr[0][j]].concat(rest[i])); + } + } + + return result; + } + } + + bubbleSelectors(selectors) { + if (!selectors) { + return; + } + + this.rules = [new Ruleset(copyArray(selectors), [this.rules[0]])]; + this.setParent(this.rules, this); + } + +} + +Media.prototype.type = 'Media'; + +// CSS @import node +// +// The general strategy here is that we don't want to wait +// for the parsing to be completed, before we start importing +// the file. That's because in the context of a browser, +// most of the time will be spent waiting for the server to respond. +// +// On creation, we push the import path to our import queue, though +// `import,push`, we also pass it a callback, which it'll call once +// the file has been fetched, and parsed. +// + +class Import extends Node { + constructor(path, features, options, index, currentFileInfo, visibilityInfo) { + this.options = options; + this._index = index; + this._fileInfo = currentFileInfo; + this.path = path; + this.features = features; + this.allowRoot = true; + + if (this.options.less !== undefined || this.options.inline) { + this.css = !this.options.less || this.options.inline; + } else { + const pathValue = this.getPath(); + + if (pathValue && /[#\.\&\?]css([\?;].*)?$/.test(pathValue)) { + this.css = true; + } + } + + this.copyVisibilityInfo(visibilityInfo); + this.setParent(this.features, this); + this.setParent(this.path, this); + } + + accept(visitor) { + if (this.features) { + this.features = visitor.visit(this.features); + } + + this.path = visitor.visit(this.path); + + if (!this.options.isPlugin && !this.options.inline && this.root) { + this.root = visitor.visit(this.root); + } + } + + genCSS(context, output) { + if (this.css && this.path._fileInfo.reference === undefined) { + output.add('@import ', this._fileInfo, this._index); + this.path.genCSS(context, output); + + if (this.features) { + output.add(' '); + this.features.genCSS(context, output); + } + + output.add(';'); + } + } + + getPath() { + return this.path instanceof URL ? this.path.value.value : this.path.value; + } + + isVariableImport() { + let path = this.path; + + if (path instanceof URL) { + path = path.value; + } + + if (path instanceof Quoted) { + return path.containsVariables(); + } + + return true; + } + + evalForImport(context) { + let path = this.path; + + if (path instanceof URL) { + path = path.value; + } + + return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo()); + } + + evalPath(context) { + const path = this.path.eval(context); + const fileInfo = this._fileInfo; + + if (!(path instanceof URL)) { + // Add the rootpath if the URL requires a rewrite + const pathValue = path.value; + + if (fileInfo && pathValue && context.pathRequiresRewrite(pathValue)) { + path.value = context.rewritePath(pathValue, fileInfo.rootpath); + } else { + path.value = context.normalizePath(path.value); + } + } + + return path; + } + + eval(context) { + const result = this.doEval(context); + + if (this.options.reference || this.blocksVisibility()) { + if (result.length || result.length === 0) { + result.forEach(node => { + node.addVisibilityBlock(); + }); + } else { + result.addVisibilityBlock(); + } + } + + return result; + } + + doEval(context) { + let ruleset; + let registry; + const features = this.features && this.features.eval(context); + + if (this.options.isPlugin) { + if (this.root && this.root.eval) { + try { + this.root.eval(context); + } catch (e) { + e.message = 'Plugin error during evaluation'; + throw new LessError(e, this.root.imports, this.root.filename); + } + } + + registry = context.frames[0] && context.frames[0].functionRegistry; + + if (registry && this.root && this.root.functions) { + registry.addMultiple(this.root.functions); + } + + return []; + } + + if (this.skip) { + if (typeof this.skip === 'function') { + this.skip = this.skip(); + } + + if (this.skip) { + return []; + } + } + + if (this.options.inline) { + const contents = new Anonymous(this.root, 0, { + filename: this.importedFilename, + reference: this.path._fileInfo && this.path._fileInfo.reference + }, true, true); + return this.features ? new Media([contents], this.features.value) : [contents]; + } else if (this.css) { + const newImport = new Import(this.evalPath(context), features, this.options, this._index); + + if (!newImport.css && this.error) { + throw this.error; + } + + return newImport; + } else { + ruleset = new Ruleset(null, copyArray(this.root.rules)); + ruleset.evalImports(context); + return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules; + } + } + +} + +Import.prototype.type = 'Import'; + +const JsEvalNode = () => {}; + +JsEvalNode.prototype = new Node(); + +JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { + let result; + const that = this; + const evalContext = {}; + + if (!context.javascriptEnabled) { + throw { + message: 'Inline JavaScript is not enabled. Is it set in your options?', + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + expression = expression.replace(/@\{([\w-]+)\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context))); + + try { + expression = new Function(`return (${expression})`); + } catch (e) { + throw { + message: `JavaScript evaluation error: ${e.message} from \`${expression}\``, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + const variables = context.frames[0].variables(); + + for (const k in variables) { + if (variables.hasOwnProperty(k)) { + /* jshint loopfunc:true */ + evalContext[k.slice(1)] = { + value: variables[k].value, + toJS: function toJS() { + return this.value.eval(context).toCSS(); + } + }; + } + } + + try { + result = expression.call(evalContext); + } catch (e) { + throw { + message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/["]/g, '\'')}'`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + return result; +}; + +JsEvalNode.prototype.jsify = obj => { + if (Array.isArray(obj.value) && obj.value.length > 1) { + return `[${obj.value.map(v => v.toCSS()).join(', ')}]`; + } else { + return obj.toCSS(); + } +}; + +class JavaScript extends JsEvalNode { + constructor(string, escaped, index, currentFileInfo) { + this.escaped = escaped; + this.expression = string; + this._index = index; + this._fileInfo = currentFileInfo; + } + + eval(context) { + const result = this.evaluateJavaScript(this.expression, context); + const type = typeof result; + + if (type === 'number' && !isNaN(result)) { + return new Dimension(result); + } else if (type === 'string') { + return new Quoted(`"${result}"`, result, this.escaped, this._index); + } else if (Array.isArray(result)) { + return new Anonymous(result.join(', ')); + } else { + return new Anonymous(result); + } + } + +} + +JavaScript.prototype.type = 'JavaScript'; + +class Assignment extends Node { + constructor(key, val) { + this.key = key; + this.value = val; + } + + accept(visitor) { + this.value = visitor.visit(this.value); + } + + eval(context) { + if (this.value.eval) { + return new Assignment(this.key, this.value.eval(context)); + } + + return this; + } + + genCSS(context, output) { + output.add(`${this.key}=`); + + if (this.value.genCSS) { + this.value.genCSS(context, output); + } else { + output.add(this.value); + } + } + +} + +Assignment.prototype.type = 'Assignment'; + +class Condition extends Node { + constructor(op, l, r, i, negate) { + this.op = op.trim(); + this.lvalue = l; + this.rvalue = r; + this._index = i; + this.negate = negate; + } + + accept(visitor) { + this.lvalue = visitor.visit(this.lvalue); + this.rvalue = visitor.visit(this.rvalue); + } + + eval(context) { + const result = ((op, a, b) => { + switch (op) { + case 'and': + return a && b; + + case 'or': + return a || b; + + default: + switch (Node.compare(a, b)) { + case -1: + return op === '<' || op === '=<' || op === '<='; + + case 0: + return op === '=' || op === '>=' || op === '=<' || op === '<='; + + case 1: + return op === '>' || op === '>='; + + default: + return false; + } + + } + })(this.op, this.lvalue.eval(context), this.rvalue.eval(context)); + + return this.negate ? !result : result; + } + +} + +Condition.prototype.type = 'Condition'; + +class UnicodeDescriptor extends Node { + constructor(value) { + this.value = value; + } + +} + +UnicodeDescriptor.prototype.type = 'UnicodeDescriptor'; + +class Negative extends Node { + constructor(node) { + this.value = node; + } + + genCSS(context, output) { + output.add('-'); + this.value.genCSS(context, output); + } + + eval(context) { + if (context.isMathOn()) { + return new Operation('*', [new Dimension(-1), this.value]).eval(context); + } + + return new Negative(this.value.eval(context)); + } + +} + +Negative.prototype.type = 'Negative'; + +class Extend extends Node { + constructor(selector, option, index, currentFileInfo, visibilityInfo) { + this.selector = selector; + this.option = option; + this.object_id = Extend.next_id++; + this.parent_ids = [this.object_id]; + this._index = index; + this._fileInfo = currentFileInfo; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + + switch (option) { + case 'all': + this.allowBefore = true; + this.allowAfter = true; + break; + + default: + this.allowBefore = false; + this.allowAfter = false; + break; + } + + this.setParent(this.selector, this); + } + + accept(visitor) { + this.selector = visitor.visit(this.selector); + } + + eval(context) { + return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + + clone(context) { + return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } // it concatenates (joins) all selectors in selector array + + + findSelfSelectors(selectors) { + let selfElements = []; + let i; + let selectorElements; + + for (i = 0; i < selectors.length; i++) { + selectorElements = selectors[i].elements; // duplicate the logic in genCSS function inside the selector node. + // future TODO - move both logics into the selector joiner visitor + + if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') { + selectorElements[0].combinator.value = ' '; + } + + selfElements = selfElements.concat(selectors[i].elements); + } + + this.selfSelectors = [new Selector(selfElements)]; + this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo()); + } + +} + +Extend.next_id = 0; +Extend.prototype.type = 'Extend'; + +class VariableCall extends Node { + constructor(variable, index, currentFileInfo) { + this.variable = variable; + this._index = index; + this._fileInfo = currentFileInfo; + this.allowRoot = true; + } + + eval(context) { + let rules; + let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context); + const error = new LessError({ + message: `Could not evaluate variable call ${this.variable}` + }); + + if (!detachedRuleset.ruleset) { + if (detachedRuleset.rules) { + rules = detachedRuleset; + } else if (Array.isArray(detachedRuleset)) { + rules = new Ruleset('', detachedRuleset); + } else if (Array.isArray(detachedRuleset.value)) { + rules = new Ruleset('', detachedRuleset.value); + } else { + throw error; + } + + detachedRuleset = new DetachedRuleset(rules); + } + + if (detachedRuleset.ruleset) { + return detachedRuleset.callEval(context); + } + + throw error; + } + +} + +VariableCall.prototype.type = 'VariableCall'; + +class NamespaceValue extends Node { + constructor(ruleCall, lookups, important, index, fileInfo) { + this.value = ruleCall; + this.lookups = lookups; + this.important = important; + this._index = index; + this._fileInfo = fileInfo; + } + + eval(context) { + let i; + let name; + let rules = this.value.eval(context); + + for (i = 0; i < this.lookups.length; i++) { + name = this.lookups[i]; + /** + * Eval'd DRs return rulesets. + * Eval'd mixins return rules, so let's make a ruleset if we need it. + * We need to do this because of late parsing of values + */ + + if (Array.isArray(rules)) { + rules = new Ruleset([new Selector()], rules); + } + + if (name === '') { + rules = rules.lastDeclaration(); + } else if (name.charAt(0) === '@') { + if (name.charAt(1) === '@') { + name = `@${new Variable(name.substr(1)).eval(context).value}`; + } + + if (rules.variables) { + rules = rules.variable(name); + } + + if (!rules) { + throw { + type: 'Name', + message: `variable ${name} not found`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + } else { + if (name.substring(0, 2) === '$@') { + name = `$${new Variable(name.substr(1)).eval(context).value}`; + } else { + name = name.charAt(0) === '$' ? name : `$${name}`; + } + + if (rules.properties) { + rules = rules.property(name); + } + + if (!rules) { + throw { + type: 'Name', + message: `property "${name.substr(1)}" not found`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } // Properties are an array of values, since a ruleset can have multiple props. + // We pick the last one (the "cascaded" value) + + + rules = rules[rules.length - 1]; + } + + if (rules.value) { + rules = rules.eval(context).value; + } + + if (rules.ruleset) { + rules = rules.ruleset.eval(context); + } + } + + return rules; + } + +} + +NamespaceValue.prototype.type = 'NamespaceValue'; + +class Definition extends Ruleset { + constructor(name, params, rules, condition, variadic, frames, visibilityInfo) { + this.name = name || 'anonymous mixin'; + this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])]; + this.params = params; + this.condition = condition; + this.variadic = variadic; + this.arity = params.length; + this.rules = rules; + this._lookups = {}; + const optionalParameters = []; + this.required = params.reduce((count, p) => { + if (!p.name || p.name && !p.value) { + return count + 1; + } else { + optionalParameters.push(p.name); + return count; + } + }, 0); + this.optionalParameters = optionalParameters; + this.frames = frames; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + } + + accept(visitor) { + if (this.params && this.params.length) { + this.params = visitor.visitArray(this.params); + } + + this.rules = visitor.visitArray(this.rules); + + if (this.condition) { + this.condition = visitor.visit(this.condition); + } + } + + evalParams(context, mixinEnv, args, evaldArguments) { + /* jshint boss:true */ + const frame = new Ruleset(null, null); + let varargs; + let arg; + const params = copyArray(this.params); + let i; + let j; + let val; + let name; + let isNamedFound; + let argIndex; + let argsLength = 0; + + if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) { + frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit(); + } + + mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames)); + + if (args) { + args = copyArray(args); + argsLength = args.length; + + for (i = 0; i < argsLength; i++) { + arg = args[i]; + + if (name = arg && arg.name) { + isNamedFound = false; + + for (j = 0; j < params.length; j++) { + if (!evaldArguments[j] && name === params[j].name) { + evaldArguments[j] = arg.value.eval(context); + frame.prependRule(new Declaration(name, arg.value.eval(context))); + isNamedFound = true; + break; + } + } + + if (isNamedFound) { + args.splice(i, 1); + i--; + continue; + } else { + throw { + type: 'Runtime', + message: `Named argument for ${this.name} ${args[i].name} not found` + }; + } + } + } + } + + argIndex = 0; + + for (i = 0; i < params.length; i++) { + if (evaldArguments[i]) { + continue; + } + + arg = args && args[argIndex]; + + if (name = params[i].name) { + if (params[i].variadic) { + varargs = []; + + for (j = argIndex; j < argsLength; j++) { + varargs.push(args[j].value.eval(context)); + } + + frame.prependRule(new Declaration(name, new Expression(varargs).eval(context))); + } else { + val = arg && arg.value; + + if (val) { + // This was a mixin call, pass in a detached ruleset of it's eval'd rules + if (Array.isArray(val)) { + val = new DetachedRuleset(new Ruleset('', val)); + } else { + val = val.eval(context); + } + } else if (params[i].value) { + val = params[i].value.eval(mixinEnv); + frame.resetCache(); + } else { + throw { + type: 'Runtime', + message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` + }; + } + + frame.prependRule(new Declaration(name, val)); + evaldArguments[i] = val; + } + } + + if (params[i].variadic && args) { + for (j = argIndex; j < argsLength; j++) { + evaldArguments[j] = args[j].value.eval(context); + } + } + + argIndex++; + } + + return frame; + } + + makeImportant() { + const rules = !this.rules ? this.rules : this.rules.map(r => { + if (r.makeImportant) { + return r.makeImportant(true); + } else { + return r; + } + }); + const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames); + return result; + } + + eval(context) { + return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || copyArray(context.frames)); + } + + evalCall(context, args, important) { + const _arguments = []; + const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames; + const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments); + let rules; + let ruleset; + frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context))); + rules = copyArray(this.rules); + ruleset = new Ruleset(null, rules); + ruleset.originalRuleset = this; + ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames))); + + if (important) { + ruleset = ruleset.makeImportant(); + } + + return ruleset; + } + + matchCondition(args, context) { + if (this.condition && !this.condition.eval(new contexts.Eval(context, [this.evalParams(context, + /* the parameter variables */ + new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])].concat(this.frames || []) // the parent namespace/mixin frames + .concat(context.frames)))) { + // the current environment frames + return false; + } + + return true; + } + + matchArgs(args, context) { + const allArgsCnt = args && args.length || 0; + let len; + const optionalParameters = this.optionalParameters; + const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => { + if (optionalParameters.indexOf(p.name) < 0) { + return count + 1; + } else { + return count; + } + }, 0); + + if (!this.variadic) { + if (requiredArgsCnt < this.required) { + return false; + } + + if (allArgsCnt > this.params.length) { + return false; + } + } else { + if (requiredArgsCnt < this.required - 1) { + return false; + } + } // check patterns + + + len = Math.min(requiredArgsCnt, this.arity); + + for (let i = 0; i < len; i++) { + if (!this.params[i].name && !this.params[i].variadic) { + if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) { + return false; + } + } + } + + return true; + } + +} + +Definition.prototype.type = 'MixinDefinition'; +Definition.prototype.evalFirst = true; + +class MixinCall extends Node { + constructor(elements, args, index, currentFileInfo, important) { + this.selector = new Selector(elements); + this.arguments = args || []; + this._index = index; + this._fileInfo = currentFileInfo; + this.important = important; + this.allowRoot = true; + this.setParent(this.selector, this); + } + + accept(visitor) { + if (this.selector) { + this.selector = visitor.visit(this.selector); + } + + if (this.arguments.length) { + this.arguments = visitor.visitArray(this.arguments); + } + } + + eval(context) { + let mixins; + let mixin; + let mixinPath; + const args = []; + let arg; + let argValue; + const rules = []; + let match = false; + let i; + let m; + let f; + let isRecursive; + let isOneFound; + const candidates = []; + let candidate; + const conditionResult = []; + let defaultResult; + const defFalseEitherCase = -1; + const defNone = 0; + const defTrue = 1; + const defFalse = 2; + let count; + let originalRuleset; + let noArgumentsFilter; + this.selector = this.selector.eval(context); + + function calcDefGroup(mixin, mixinPath) { + let f; + let p; + let namespace; + + for (f = 0; f < 2; f++) { + conditionResult[f] = true; + defaultFunc$1.value(f); + + for (p = 0; p < mixinPath.length && conditionResult[f]; p++) { + namespace = mixinPath[p]; + + if (namespace.matchCondition) { + conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context); + } + } + + if (mixin.matchCondition) { + conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context); + } + } + + if (conditionResult[0] || conditionResult[1]) { + if (conditionResult[0] != conditionResult[1]) { + return conditionResult[1] ? defTrue : defFalse; + } + + return defNone; + } + + return defFalseEitherCase; + } + + for (i = 0; i < this.arguments.length; i++) { + arg = this.arguments[i]; + argValue = arg.value.eval(context); + + if (arg.expand && Array.isArray(argValue.value)) { + argValue = argValue.value; + + for (m = 0; m < argValue.length; m++) { + args.push({ + value: argValue[m] + }); + } + } else { + args.push({ + name: arg.name, + value: argValue + }); + } + } + + noArgumentsFilter = rule => rule.matchArgs(null, context); + + for (i = 0; i < context.frames.length; i++) { + if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) { + isOneFound = true; // To make `default()` function independent of definition order we have two "subpasses" here. + // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`), + // and build candidate list with corresponding flags. Then, when we know all possible matches, + // we make a final decision. + + for (m = 0; m < mixins.length; m++) { + mixin = mixins[m].rule; + mixinPath = mixins[m].path; + isRecursive = false; + + for (f = 0; f < context.frames.length; f++) { + if (!(mixin instanceof Definition) && mixin === (context.frames[f].originalRuleset || context.frames[f])) { + isRecursive = true; + break; + } + } + + if (isRecursive) { + continue; + } + + if (mixin.matchArgs(args, context)) { + candidate = { + mixin, + group: calcDefGroup(mixin, mixinPath) + }; + + if (candidate.group !== defFalseEitherCase) { + candidates.push(candidate); + } + + match = true; + } + } + + defaultFunc$1.reset(); + count = [0, 0, 0]; + + for (m = 0; m < candidates.length; m++) { + count[candidates[m].group]++; + } + + if (count[defNone] > 0) { + defaultResult = defFalse; + } else { + defaultResult = defTrue; + + if (count[defTrue] + count[defFalse] > 1) { + throw { + type: 'Runtime', + message: `Ambiguous use of \`default()\` found when matching for \`${this.format(args)}\``, + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } + } + + for (m = 0; m < candidates.length; m++) { + candidate = candidates[m].group; + + if (candidate === defNone || candidate === defaultResult) { + try { + mixin = candidates[m].mixin; + + if (!(mixin instanceof Definition)) { + originalRuleset = mixin.originalRuleset || mixin; + mixin = new Definition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo()); + mixin.originalRuleset = originalRuleset; + } + + const newRules = mixin.evalCall(context, args, this.important).rules; + + this._setVisibilityToReplacement(newRules); + + Array.prototype.push.apply(rules, newRules); + } catch (e) { + throw { + message: e.message, + index: this.getIndex(), + filename: this.fileInfo().filename, + stack: e.stack + }; + } + } + } + + if (match) { + return rules; + } + } + } + + if (isOneFound) { + throw { + type: 'Runtime', + message: `No matching definition was found for \`${this.format(args)}\``, + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } else { + throw { + type: 'Name', + message: `${this.selector.toCSS().trim()} is undefined`, + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } + } + + _setVisibilityToReplacement(replacement) { + let i; + let rule; + + if (this.blocksVisibility()) { + for (i = 0; i < replacement.length; i++) { + rule = replacement[i]; + rule.addVisibilityBlock(); + } + } + } + + format(args) { + return `${this.selector.toCSS().trim()}(${args ? args.map(a => { + let argValue = ''; + + if (a.name) { + argValue += `${a.name}:`; + } + + if (a.value.toCSS) { + argValue += a.value.toCSS(); + } else { + argValue += '???'; + } + + return argValue; + }).join(', ') : ''})`; + } + +} + +MixinCall.prototype.type = 'MixinCall'; + +var tree = { + Node, + Color, + AtRule, + DetachedRuleset, + Operation, + Dimension, + Unit, + Keyword, + Variable, + Property, + Ruleset, + Element, + Attribute, + Combinator, + Selector, + Quoted, + Expression, + Declaration, + Call, + URL, + Import, + Comment, + Anonymous, + Value, + JavaScript, + Assignment, + Condition, + Paren, + Media, + UnicodeDescriptor, + Negative, + Extend, + VariableCall, + NamespaceValue, + mixin: { + Call: MixinCall, + Definition: Definition + } +}; + +/** + * @todo Document why this abstraction exists, and the relationship between + * environment, file managers, and plugin manager + */ + +class environment$1 { + constructor(externalEnvironment, fileManagers) { + this.fileManagers = fileManagers || []; + externalEnvironment = externalEnvironment || {}; + const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator']; + const requiredFunctions = []; + const functions = requiredFunctions.concat(optionalFunctions); + + for (let i = 0; i < functions.length; i++) { + const propName = functions[i]; + const environmentFunc = externalEnvironment[propName]; + + if (environmentFunc) { + this[propName] = environmentFunc.bind(externalEnvironment); + } else if (i < requiredFunctions.length) { + this.warn(`missing required function in environment - ${propName}`); + } + } + } + + getFileManager(filename, currentDirectory, options, environment, isSync) { + if (!filename) { + logger.warn('getFileManager called with no filename.. Please report this issue. continuing.'); + } + + if (currentDirectory == null) { + logger.warn('getFileManager called with null directory.. Please report this issue. continuing.'); + } + + let fileManagers = this.fileManagers; + + if (options.pluginManager) { + fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers()); + } + + for (let i = fileManagers.length - 1; i >= 0; i--) { + const fileManager = fileManagers[i]; + + if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) { + return fileManager; + } + } + + return null; + } + + addFileManager(fileManager) { + this.fileManagers.push(fileManager); + } + + clearFileManagers() { + this.fileManagers = []; + } + +} + +class AbstractPluginLoader { + constructor() { + // Implemented by Node.js plugin loader + this.require = () => null; + } + + evalPlugin(contents, context, imports, pluginOptions, fileInfo) { + let loader; + let registry; + let pluginObj; + let localModule; + let pluginManager; + let filename; + let result; + pluginManager = context.pluginManager; + + if (fileInfo) { + if (typeof fileInfo === 'string') { + filename = fileInfo; + } else { + filename = fileInfo.filename; + } + } + + const shortname = new this.less.FileManager().extractUrlParts(filename).filename; + + if (filename) { + pluginObj = pluginManager.get(filename); + + if (pluginObj) { + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; + } + + try { + if (pluginObj.use) { + pluginObj.use.call(this.context, pluginObj); + } + } catch (e) { + e.message = e.message || 'Error during @plugin call'; + return new LessError(e, imports, filename); + } + + return pluginObj; + } + } + + localModule = { + exports: {}, + pluginManager, + fileInfo + }; + registry = functionRegistry.create(); + + const registerPlugin = obj => { + pluginObj = obj; + }; + + try { + loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents); + loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo); + } catch (e) { + return new LessError(e, imports, filename); + } + + if (!pluginObj) { + pluginObj = localModule.exports; + } + + pluginObj = this.validatePlugin(pluginObj, filename, shortname); + + if (pluginObj instanceof LessError) { + return pluginObj; + } + + if (pluginObj) { + pluginObj.imports = imports; + pluginObj.filename = filename; // For < 3.x (or unspecified minVersion) - setOptions() before install() + + if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) { + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; + } + } // Run on first load + + + pluginManager.addPlugin(pluginObj, fileInfo.filename, registry); + pluginObj.functions = registry.getLocalFunctions(); // Need to call setOptions again because the pluginObj might have functions + + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; + } // Run every @plugin call + + + try { + if (pluginObj.use) { + pluginObj.use.call(this.context, pluginObj); + } + } catch (e) { + e.message = e.message || 'Error during @plugin call'; + return new LessError(e, imports, filename); + } + } else { + return new LessError({ + message: 'Not a valid plugin' + }, imports, filename); + } + + return pluginObj; + } + + trySetOptions(plugin, filename, name, options) { + if (options && !plugin.setOptions) { + return new LessError({ + message: `Options have been provided but the plugin ${name} does not support any options.` + }); + } + + try { + plugin.setOptions && plugin.setOptions(options); + } catch (e) { + return new LessError(e); + } + } + + validatePlugin(plugin, filename, name) { + if (plugin) { + // support plugins being a function + // so that the plugin can be more usable programmatically + if (typeof plugin === 'function') { + plugin = new plugin(); + } + + if (plugin.minVersion) { + if (this.compareVersion(plugin.minVersion, this.less.version) < 0) { + return new LessError({ + message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}` + }); + } + } + + return plugin; + } + + return null; + } + + compareVersion(aVersion, bVersion) { + if (typeof aVersion === 'string') { + aVersion = aVersion.match(/^(\d+)\.?(\d+)?\.?(\d+)?/); + aVersion.shift(); + } + + for (let i = 0; i < aVersion.length; i++) { + if (aVersion[i] !== bVersion[i]) { + return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1; + } + } + + return 0; + } + + versionToString(version) { + let versionString = ''; + + for (let i = 0; i < version.length; i++) { + versionString += (versionString ? '.' : '') + version[i]; + } + + return versionString; + } + + printUsage(plugins) { + for (let i = 0; i < plugins.length; i++) { + const plugin = plugins[i]; + + if (plugin.printUsage) { + plugin.printUsage(); + } + } + } + +} + +const _visitArgs = { + visitDeeper: true +}; +let _hasIndexed = false; + +function _noop(node) { + return node; +} + +function indexNodeTypes(parent, ticker) { + // add .typeIndex to tree node types for lookup table + let key; + let child; + + for (key in parent) { + /* eslint guard-for-in: 0 */ + child = parent[key]; + + switch (typeof child) { + case 'function': + // ignore bound functions directly on tree which do not have a prototype + // or aren't nodes + if (child.prototype && child.prototype.type) { + child.prototype.typeIndex = ticker++; + } + + break; + + case 'object': + ticker = indexNodeTypes(child, ticker); + break; + } + } + + return ticker; +} + +class Visitor { + constructor(implementation) { + this._implementation = implementation; + this._visitInCache = {}; + this._visitOutCache = {}; + + if (!_hasIndexed) { + indexNodeTypes(tree, 1); + _hasIndexed = true; + } + } + + visit(node) { + if (!node) { + return node; + } + + const nodeTypeIndex = node.typeIndex; + + if (!nodeTypeIndex) { + // MixinCall args aren't a node type? + if (node.value && node.value.typeIndex) { + this.visit(node.value); + } + + return node; + } + + const impl = this._implementation; + let func = this._visitInCache[nodeTypeIndex]; + let funcOut = this._visitOutCache[nodeTypeIndex]; + const visitArgs = _visitArgs; + let fnName; + visitArgs.visitDeeper = true; + + if (!func) { + fnName = `visit${node.type}`; + func = impl[fnName] || _noop; + funcOut = impl[`${fnName}Out`] || _noop; + this._visitInCache[nodeTypeIndex] = func; + this._visitOutCache[nodeTypeIndex] = funcOut; + } + + if (func !== _noop) { + const newNode = func.call(impl, node, visitArgs); + + if (node && impl.isReplacing) { + node = newNode; + } + } + + if (visitArgs.visitDeeper && node && node.accept) { + node.accept(this); + } + + if (funcOut != _noop) { + funcOut.call(impl, node); + } + + return node; + } + + visitArray(nodes, nonReplacing) { + if (!nodes) { + return nodes; + } + + const cnt = nodes.length; + let i; // Non-replacing + + if (nonReplacing || !this._implementation.isReplacing) { + for (i = 0; i < cnt; i++) { + this.visit(nodes[i]); + } + + return nodes; + } // Replacing + + + const out = []; + + for (i = 0; i < cnt; i++) { + const evald = this.visit(nodes[i]); + + if (evald === undefined) { + continue; + } + + if (!evald.splice) { + out.push(evald); + } else if (evald.length) { + this.flatten(evald, out); + } + } + + return out; + } + + flatten(arr, out) { + if (!out) { + out = []; + } + + let cnt; + let i; + let item; + let nestedCnt; + let j; + let nestedItem; + + for (i = 0, cnt = arr.length; i < cnt; i++) { + item = arr[i]; + + if (item === undefined) { + continue; + } + + if (!item.splice) { + out.push(item); + continue; + } + + for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) { + nestedItem = item[j]; + + if (nestedItem === undefined) { + continue; + } + + if (!nestedItem.splice) { + out.push(nestedItem); + } else if (nestedItem.length) { + this.flatten(nestedItem, out); + } + } + } + + return out; + } + +} + +class ImportSequencer { + constructor(onSequencerEmpty) { + this.imports = []; + this.variableImports = []; + this._onSequencerEmpty = onSequencerEmpty; + this._currentDepth = 0; + } + + addImport(callback) { + const importSequencer = this; + const importItem = { + callback, + args: null, + isReady: false + }; + this.imports.push(importItem); + return function (...args) { + importItem.args = Array.prototype.slice.call(args, 0); + importItem.isReady = true; + importSequencer.tryRun(); + }; + } + + addVariableImport(callback) { + this.variableImports.push(callback); + } + + tryRun() { + this._currentDepth++; + + try { + while (true) { + while (this.imports.length > 0) { + const importItem = this.imports[0]; + + if (!importItem.isReady) { + return; + } + + this.imports = this.imports.slice(1); + importItem.callback.apply(null, importItem.args); + } + + if (this.variableImports.length === 0) { + break; + } + + const variableImport = this.variableImports[0]; + this.variableImports = this.variableImports.slice(1); + variableImport(); + } + } finally { + this._currentDepth--; + } + + if (this._currentDepth === 0 && this._onSequencerEmpty) { + this._onSequencerEmpty(); + } + } + +} + +const ImportVisitor = function ImportVisitor(importer, finish) { + this._visitor = new Visitor(this); + this._importer = importer; + this._finish = finish; + this.context = new contexts.Eval(); + this.importCount = 0; + this.onceFileDetectionMap = {}; + this.recursionDetector = {}; + this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this)); +}; + +ImportVisitor.prototype = { + isReplacing: false, + run: function run(root) { + try { + // process the contents + this._visitor.visit(root); + } catch (e) { + this.error = e; + } + + this.isFinished = true; + + this._sequencer.tryRun(); + }, + _onSequencerEmpty: function _onSequencerEmpty() { + if (!this.isFinished) { + return; + } + + this._finish(this.error); + }, + visitImport: function visitImport(importNode, visitArgs) { + const inlineCSS = importNode.options.inline; + + if (!importNode.css || inlineCSS) { + const context = new contexts.Eval(this.context, copyArray(this.context.frames)); + const importParent = context.frames[0]; + this.importCount++; + + if (importNode.isVariableImport()) { + this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent)); + } else { + this.processImportNode(importNode, context, importParent); + } + } + + visitArgs.visitDeeper = false; + }, + processImportNode: function processImportNode(importNode, context, importParent) { + let evaldImportNode; + const inlineCSS = importNode.options.inline; + + try { + evaldImportNode = importNode.evalForImport(context); + } catch (e) { + if (!e.filename) { + e.index = importNode.getIndex(); + e.filename = importNode.fileInfo().filename; + } // attempt to eval properly and treat as css + + + importNode.css = true; // if that fails, this error will be thrown + + importNode.error = e; + } + + if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) { + if (evaldImportNode.options.multiple) { + context.importMultiple = true; + } // try appending if we haven't determined if it is css or not + + + const tryAppendLessExtension = evaldImportNode.css === undefined; + + for (let i = 0; i < importParent.rules.length; i++) { + if (importParent.rules[i] === importNode) { + importParent.rules[i] = evaldImportNode; + break; + } + } + + const onImported = this.onImported.bind(this, evaldImportNode, context); + + const sequencedOnImported = this._sequencer.addImport(onImported); + + this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(), evaldImportNode.options, sequencedOnImported); + } else { + this.importCount--; + + if (this.isFinished) { + this._sequencer.tryRun(); + } + } + }, + onImported: function onImported(importNode, context, e, root, importedAtRoot, fullPath) { + if (e) { + if (!e.filename) { + e.index = importNode.getIndex(); + e.filename = importNode.fileInfo().filename; + } + + this.error = e; + } + + const importVisitor = this; + const inlineCSS = importNode.options.inline; + const isPlugin = importNode.options.isPlugin; + const isOptional = importNode.options.optional; + const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector; + + if (!context.importMultiple) { + if (duplicateImport) { + importNode.skip = true; + } else { + importNode.skip = () => { + if (fullPath in importVisitor.onceFileDetectionMap) { + return true; + } + + importVisitor.onceFileDetectionMap[fullPath] = true; + return false; + }; + } + } + + if (!fullPath && isOptional) { + importNode.skip = true; + } + + if (root) { + importNode.root = root; + importNode.importedFilename = fullPath; + + if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) { + importVisitor.recursionDetector[fullPath] = true; + const oldContext = this.context; + this.context = context; + + try { + this._visitor.visit(root); + } catch (e) { + this.error = e; + } + + this.context = oldContext; + } + } + + importVisitor.importCount--; + + if (importVisitor.isFinished) { + importVisitor._sequencer.tryRun(); + } + }, + visitDeclaration: function visitDeclaration(declNode, visitArgs) { + if (declNode.value.type === 'DetachedRuleset') { + this.context.frames.unshift(declNode); + } else { + visitArgs.visitDeeper = false; + } + }, + visitDeclarationOut: function visitDeclarationOut(declNode) { + if (declNode.value.type === 'DetachedRuleset') { + this.context.frames.shift(); + } + }, + visitAtRule: function visitAtRule(atRuleNode, visitArgs) { + this.context.frames.unshift(atRuleNode); + }, + visitAtRuleOut: function visitAtRuleOut(atRuleNode) { + this.context.frames.shift(); + }, + visitMixinDefinition: function visitMixinDefinition(mixinDefinitionNode, visitArgs) { + this.context.frames.unshift(mixinDefinitionNode); + }, + visitMixinDefinitionOut: function visitMixinDefinitionOut(mixinDefinitionNode) { + this.context.frames.shift(); + }, + visitRuleset: function visitRuleset(rulesetNode, visitArgs) { + this.context.frames.unshift(rulesetNode); + }, + visitRulesetOut: function visitRulesetOut(rulesetNode) { + this.context.frames.shift(); + }, + visitMedia: function visitMedia(mediaNode, visitArgs) { + this.context.frames.unshift(mediaNode.rules[0]); + }, + visitMediaOut: function visitMediaOut(mediaNode) { + this.context.frames.shift(); + } +}; + +class SetTreeVisibilityVisitor { + constructor(visible) { + this.visible = visible; + } + + run(root) { + this.visit(root); + } + + visitArray(nodes) { + if (!nodes) { + return nodes; + } + + const cnt = nodes.length; + let i; + + for (i = 0; i < cnt; i++) { + this.visit(nodes[i]); + } + + return nodes; + } + + visit(node) { + if (!node) { + return node; + } + + if (node.constructor === Array) { + return this.visitArray(node); + } + + if (!node.blocksVisibility || node.blocksVisibility()) { + return node; + } + + if (this.visible) { + node.ensureVisibility(); + } else { + node.ensureInvisibility(); + } + + node.accept(this); + return node; + } + +} + +/* jshint loopfunc:true */ + +class ExtendFinderVisitor { + constructor() { + this._visitor = new Visitor(this); + this.contexts = []; + this.allExtendsStack = [[]]; + } + + run(root) { + root = this._visitor.visit(root); + root.allExtends = this.allExtendsStack[0]; + return root; + } + + visitDeclaration(declNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitMixinDefinition(mixinDefinitionNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitRuleset(rulesetNode, visitArgs) { + if (rulesetNode.root) { + return; + } + + let i; + let j; + let extend; + const allSelectorsExtendList = []; + let extendList; // get &:extend(.a); rules which apply to all selectors in this ruleset + + const rules = rulesetNode.rules; + const ruleCnt = rules ? rules.length : 0; + + for (i = 0; i < ruleCnt; i++) { + if (rulesetNode.rules[i] instanceof tree.Extend) { + allSelectorsExtendList.push(rules[i]); + rulesetNode.extendOnEveryPath = true; + } + } // now find every selector and apply the extends that apply to all extends + // and the ones which apply to an individual extend + + + const paths = rulesetNode.paths; + + for (i = 0; i < paths.length; i++) { + const selectorPath = paths[i]; + const selector = selectorPath[selectorPath.length - 1]; + const selExtendList = selector.extendList; + extendList = selExtendList ? copyArray(selExtendList).concat(allSelectorsExtendList) : allSelectorsExtendList; + + if (extendList) { + extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone()); + } + + for (j = 0; j < extendList.length; j++) { + this.foundExtends = true; + extend = extendList[j]; + extend.findSelfSelectors(selectorPath); + extend.ruleset = rulesetNode; + + if (j === 0) { + extend.firstExtendOnThisSelectorPath = true; + } + + this.allExtendsStack[this.allExtendsStack.length - 1].push(extend); + } + } + + this.contexts.push(rulesetNode.selectors); + } + + visitRulesetOut(rulesetNode) { + if (!rulesetNode.root) { + this.contexts.length = this.contexts.length - 1; + } + } + + visitMedia(mediaNode, visitArgs) { + mediaNode.allExtends = []; + this.allExtendsStack.push(mediaNode.allExtends); + } + + visitMediaOut(mediaNode) { + this.allExtendsStack.length = this.allExtendsStack.length - 1; + } + + visitAtRule(atRuleNode, visitArgs) { + atRuleNode.allExtends = []; + this.allExtendsStack.push(atRuleNode.allExtends); + } + + visitAtRuleOut(atRuleNode) { + this.allExtendsStack.length = this.allExtendsStack.length - 1; + } + +} + +class ProcessExtendsVisitor { + constructor() { + this._visitor = new Visitor(this); + } + + run(root) { + const extendFinder = new ExtendFinderVisitor(); + this.extendIndices = {}; + extendFinder.run(root); + + if (!extendFinder.foundExtends) { + return root; + } + + root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends)); + this.allExtendsStack = [root.allExtends]; + + const newRoot = this._visitor.visit(root); + + this.checkExtendsForNonMatched(root.allExtends); + return newRoot; + } + + checkExtendsForNonMatched(extendList) { + const indices = this.extendIndices; + extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => { + let selector = '_unknown_'; + + try { + selector = extend.selector.toCSS({}); + } catch (_) {} + + if (!indices[`${extend.index} ${selector}`]) { + indices[`${extend.index} ${selector}`] = true; + logger.warn(`extend '${selector}' has no matches`); + } + }); + } + + doExtendChaining(extendsList, extendsListTarget, iterationCount) { + // + // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering + // and pasting the selector we would do normally, but we are also adding an extend with the same target selector + // this means this new extend can then go and alter other extends + // + // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors + // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already + // processed if we look at each selector at a time, as is done in visitRuleset + let extendIndex; + let targetExtendIndex; + let matches; + const extendsToAdd = []; + let newSelector; + const extendVisitor = this; + let selectorPath; + let extend; + let targetExtend; + let newExtend; + iterationCount = iterationCount || 0; // loop through comparing every extend with every target extend. + // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place + // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one + // and the second is the target. + // the separation into two lists allows us to process a subset of chains with a bigger set, as is the + // case when processing media queries + + for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) { + for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) { + extend = extendsList[extendIndex]; + targetExtend = extendsListTarget[targetExtendIndex]; // look for circular references + + if (extend.parent_ids.indexOf(targetExtend.object_id) >= 0) { + continue; + } // find a match in the target extends self selector (the bit before :extend) + + + selectorPath = [targetExtend.selfSelectors[0]]; + matches = extendVisitor.findMatch(extend, selectorPath); + + if (matches.length) { + extend.hasFoundMatches = true; // we found a match, so for each self selector.. + + extend.selfSelectors.forEach(selfSelector => { + const info = targetExtend.visibilityInfo(); // process the extend as usual + + newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible()); // but now we create a new extend from it + + newExtend = new tree.Extend(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info); + newExtend.selfSelectors = newSelector; // add the extend onto the list of extends for that selector + + newSelector[newSelector.length - 1].extendList = [newExtend]; // record that we need to add it. + + extendsToAdd.push(newExtend); + newExtend.ruleset = targetExtend.ruleset; // remember its parents for circular references + + newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids); // only process the selector once.. if we have :extend(.a,.b) then multiple + // extends will look at the same selector path, so when extending + // we know that any others will be duplicates in terms of what is added to the css + + if (targetExtend.firstExtendOnThisSelectorPath) { + newExtend.firstExtendOnThisSelectorPath = true; + targetExtend.ruleset.paths.push(newSelector); + } + }); + } + } + } + + if (extendsToAdd.length) { + // try to detect circular references to stop a stack overflow. + // may no longer be needed. + this.extendChainCount++; + + if (iterationCount > 100) { + let selectorOne = '{unable to calculate}'; + let selectorTwo = '{unable to calculate}'; + + try { + selectorOne = extendsToAdd[0].selfSelectors[0].toCSS(); + selectorTwo = extendsToAdd[0].selector.toCSS(); + } catch (e) {} + + throw { + message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})` + }; + } // now process the new extends on the existing rules so that we can handle a extending b extending c extending + // d extending e... + + + return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1)); + } else { + return extendsToAdd; + } + } + + visitDeclaration(ruleNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitMixinDefinition(mixinDefinitionNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitSelector(selectorNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitRuleset(rulesetNode, visitArgs) { + if (rulesetNode.root) { + return; + } + + let matches; + let pathIndex; + let extendIndex; + const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1]; + const selectorsToAdd = []; + const extendVisitor = this; + let selectorPath; // look at each selector path in the ruleset, find any extend matches and then copy, find and replace + + for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) { + for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) { + selectorPath = rulesetNode.paths[pathIndex]; // extending extends happens initially, before the main pass + + if (rulesetNode.extendOnEveryPath) { + continue; + } + + const extendList = selectorPath[selectorPath.length - 1].extendList; + + if (extendList && extendList.length) { + continue; + } + + matches = this.findMatch(allExtends[extendIndex], selectorPath); + + if (matches.length) { + allExtends[extendIndex].hasFoundMatches = true; + allExtends[extendIndex].selfSelectors.forEach(selfSelector => { + let extendedSelectors; + extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible()); + selectorsToAdd.push(extendedSelectors); + }); + } + } + } + + rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd); + } + + findMatch(extend, haystackSelectorPath) { + // + // look through the haystack selector path to try and find the needle - extend.selector + // returns an array of selector matches that can then be replaced + // + let haystackSelectorIndex; + let hackstackSelector; + let hackstackElementIndex; + let haystackElement; + let targetCombinator; + let i; + const extendVisitor = this; + const needleElements = extend.selector.elements; + const potentialMatches = []; + let potentialMatch; + const matches = []; // loop through the haystack elements + + for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) { + hackstackSelector = haystackSelectorPath[haystackSelectorIndex]; + + for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) { + haystackElement = hackstackSelector.elements[hackstackElementIndex]; // if we allow elements before our match we can add a potential match every time. otherwise only at the first element. + + if (extend.allowBefore || haystackSelectorIndex === 0 && hackstackElementIndex === 0) { + potentialMatches.push({ + pathIndex: haystackSelectorIndex, + index: hackstackElementIndex, + matched: 0, + initialCombinator: haystackElement.combinator + }); + } + + for (i = 0; i < potentialMatches.length; i++) { + potentialMatch = potentialMatches[i]; // selectors add " " onto the first element. When we use & it joins the selectors together, but if we don't + // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to + // work out what the resulting combinator will be + + targetCombinator = haystackElement.combinator.value; + + if (targetCombinator === '' && hackstackElementIndex === 0) { + targetCombinator = ' '; + } // if we don't match, null our match to indicate failure + + + if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) || potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator) { + potentialMatch = null; + } else { + potentialMatch.matched++; + } // if we are still valid and have finished, test whether we have elements after and whether these are allowed + + + if (potentialMatch) { + potentialMatch.finished = potentialMatch.matched === needleElements.length; + + if (potentialMatch.finished && !extend.allowAfter && (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length)) { + potentialMatch = null; + } + } // if null we remove, if not, we are still valid, so either push as a valid match or continue + + + if (potentialMatch) { + if (potentialMatch.finished) { + potentialMatch.length = needleElements.length; + potentialMatch.endPathIndex = haystackSelectorIndex; + potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match + + potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again + + matches.push(potentialMatch); + } + } else { + potentialMatches.splice(i, 1); + i--; + } + } + } + } + + return matches; + } + + isElementValuesEqual(elementValue1, elementValue2) { + if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') { + return elementValue1 === elementValue2; + } + + if (elementValue1 instanceof tree.Attribute) { + if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) { + return false; + } + + if (!elementValue1.value || !elementValue2.value) { + if (elementValue1.value || elementValue2.value) { + return false; + } + + return true; + } + + elementValue1 = elementValue1.value.value || elementValue1.value; + elementValue2 = elementValue2.value.value || elementValue2.value; + return elementValue1 === elementValue2; + } + + elementValue1 = elementValue1.value; + elementValue2 = elementValue2.value; + + if (elementValue1 instanceof tree.Selector) { + if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) { + return false; + } + + for (let i = 0; i < elementValue1.elements.length; i++) { + if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) { + if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) { + return false; + } + } + + if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) { + return false; + } + } + + return true; + } + + return false; + } + + extendSelector(matches, selectorPath, replacementSelector, isVisible) { + // for a set of matches, replace each match with the replacement selector + let currentSelectorPathIndex = 0; + let currentSelectorPathElementIndex = 0; + let path = []; + let matchIndex; + let selector; + let firstElement; + let match; + let newElements; + + for (matchIndex = 0; matchIndex < matches.length; matchIndex++) { + match = matches[matchIndex]; + selector = selectorPath[match.pathIndex]; + firstElement = new tree.Element(match.initialCombinator, replacementSelector.elements[0].value, replacementSelector.elements[0].isVariable, replacementSelector.elements[0].getIndex(), replacementSelector.elements[0].fileInfo()); + + if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) { + path[path.length - 1].elements = path[path.length - 1].elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex)); + currentSelectorPathElementIndex = 0; + currentSelectorPathIndex++; + } + + newElements = selector.elements.slice(currentSelectorPathElementIndex, match.index).concat([firstElement]).concat(replacementSelector.elements.slice(1)); + + if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) { + path[path.length - 1].elements = path[path.length - 1].elements.concat(newElements); + } else { + path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex)); + path.push(new tree.Selector(newElements)); + } + + currentSelectorPathIndex = match.endPathIndex; + currentSelectorPathElementIndex = match.endPathElementIndex; + + if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) { + currentSelectorPathElementIndex = 0; + currentSelectorPathIndex++; + } + } + + if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) { + path[path.length - 1].elements = path[path.length - 1].elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex)); + currentSelectorPathIndex++; + } + + path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length)); + path = path.map(currentValue => { + // we can re-use elements here, because the visibility property matters only for selectors + const derived = currentValue.createDerived(currentValue.elements); + + if (isVisible) { + derived.ensureVisibility(); + } else { + derived.ensureInvisibility(); + } + + return derived; + }); + return path; + } + + visitMedia(mediaNode, visitArgs) { + let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); + newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends)); + this.allExtendsStack.push(newAllExtends); + } + + visitMediaOut(mediaNode) { + const lastIndex = this.allExtendsStack.length - 1; + this.allExtendsStack.length = lastIndex; + } + + visitAtRule(atRuleNode, visitArgs) { + let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); + newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends)); + this.allExtendsStack.push(newAllExtends); + } + + visitAtRuleOut(atRuleNode) { + const lastIndex = this.allExtendsStack.length - 1; + this.allExtendsStack.length = lastIndex; + } + +} + +class JoinSelectorVisitor { + constructor() { + this.contexts = [[]]; + this._visitor = new Visitor(this); + } + + run(root) { + return this._visitor.visit(root); + } + + visitDeclaration(declNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitMixinDefinition(mixinDefinitionNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitRuleset(rulesetNode, visitArgs) { + const context = this.contexts[this.contexts.length - 1]; + const paths = []; + let selectors; + this.contexts.push(paths); + + if (!rulesetNode.root) { + selectors = rulesetNode.selectors; + + if (selectors) { + selectors = selectors.filter(selector => selector.getIsOutput()); + rulesetNode.selectors = selectors.length ? selectors : selectors = null; + + if (selectors) { + rulesetNode.joinSelectors(paths, context, selectors); + } + } + + if (!selectors) { + rulesetNode.rules = null; + } + + rulesetNode.paths = paths; + } + } + + visitRulesetOut(rulesetNode) { + this.contexts.length = this.contexts.length - 1; + } + + visitMedia(mediaNode, visitArgs) { + const context = this.contexts[this.contexts.length - 1]; + mediaNode.rules[0].root = context.length === 0 || context[0].multiMedia; + } + + visitAtRule(atRuleNode, visitArgs) { + const context = this.contexts[this.contexts.length - 1]; + + if (atRuleNode.rules && atRuleNode.rules.length) { + atRuleNode.rules[0].root = atRuleNode.isRooted || context.length === 0 || null; + } + } + +} + +class CSSVisitorUtils { + constructor(context) { + this._visitor = new Visitor(this); + this._context = context; + } + + containsSilentNonBlockedChild(bodyRules) { + let rule; + + if (!bodyRules) { + return false; + } + + for (let r = 0; r < bodyRules.length; r++) { + rule = bodyRules[r]; + + if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) { + // the atrule contains something that was referenced (likely by extend) + // therefore it needs to be shown in output too + return true; + } + } + + return false; + } + + keepOnlyVisibleChilds(owner) { + if (owner && owner.rules) { + owner.rules = owner.rules.filter(thing => thing.isVisible()); + } + } + + isEmpty(owner) { + return owner && owner.rules ? owner.rules.length === 0 : true; + } + + hasVisibleSelector(rulesetNode) { + return rulesetNode && rulesetNode.paths ? rulesetNode.paths.length > 0 : false; + } + + resolveVisibility(node, originalRules) { + if (!node.blocksVisibility()) { + if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) { + return; + } + + return node; + } + + const compiledRulesBody = node.rules[0]; + this.keepOnlyVisibleChilds(compiledRulesBody); + + if (this.isEmpty(compiledRulesBody)) { + return; + } + + node.ensureVisibility(); + node.removeVisibilityBlock(); + return node; + } + + isVisibleRuleset(rulesetNode) { + if (rulesetNode.firstRoot) { + return true; + } + + if (this.isEmpty(rulesetNode)) { + return false; + } + + if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) { + return false; + } + + return true; + } + +} + +const ToCSSVisitor = function ToCSSVisitor(context) { + this._visitor = new Visitor(this); + this._context = context; + this.utils = new CSSVisitorUtils(context); +}; + +ToCSSVisitor.prototype = { + isReplacing: true, + run: function run(root) { + return this._visitor.visit(root); + }, + visitDeclaration: function visitDeclaration(declNode, visitArgs) { + if (declNode.blocksVisibility() || declNode.variable) { + return; + } + + return declNode; + }, + visitMixinDefinition: function visitMixinDefinition(mixinNode, visitArgs) { + // mixin definitions do not get eval'd - this means they keep state + // so we have to clear that state here so it isn't used if toCSS is called twice + mixinNode.frames = []; + }, + visitExtend: function visitExtend(extendNode, visitArgs) {}, + visitComment: function visitComment(commentNode, visitArgs) { + if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) { + return; + } + + return commentNode; + }, + visitMedia: function visitMedia(mediaNode, visitArgs) { + const originalRules = mediaNode.rules[0].rules; + mediaNode.accept(this._visitor); + visitArgs.visitDeeper = false; + return this.utils.resolveVisibility(mediaNode, originalRules); + }, + visitImport: function visitImport(importNode, visitArgs) { + if (importNode.blocksVisibility()) { + return; + } + + return importNode; + }, + visitAtRule: function visitAtRule(atRuleNode, visitArgs) { + if (atRuleNode.rules && atRuleNode.rules.length) { + return this.visitAtRuleWithBody(atRuleNode, visitArgs); + } else { + return this.visitAtRuleWithoutBody(atRuleNode, visitArgs); + } + }, + visitAnonymous: function visitAnonymous(anonymousNode, visitArgs) { + if (!anonymousNode.blocksVisibility()) { + anonymousNode.accept(this._visitor); + return anonymousNode; + } + }, + visitAtRuleWithBody: function visitAtRuleWithBody(atRuleNode, visitArgs) { + // if there is only one nested ruleset and that one has no path, then it is + // just fake ruleset + function hasFakeRuleset(atRuleNode) { + const bodyRules = atRuleNode.rules; + return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0); + } + + function getBodyRules(atRuleNode) { + const nodeRules = atRuleNode.rules; + + if (hasFakeRuleset(atRuleNode)) { + return nodeRules[0].rules; + } + + return nodeRules; + } // it is still true that it is only one ruleset in array + // this is last such moment + // process childs + + + const originalRules = getBodyRules(atRuleNode); + atRuleNode.accept(this._visitor); + visitArgs.visitDeeper = false; + + if (!this.utils.isEmpty(atRuleNode)) { + this._mergeRules(atRuleNode.rules[0].rules); + } + + return this.utils.resolveVisibility(atRuleNode, originalRules); + }, + visitAtRuleWithoutBody: function visitAtRuleWithoutBody(atRuleNode, visitArgs) { + if (atRuleNode.blocksVisibility()) { + return; + } + + if (atRuleNode.name === '@charset') { + // Only output the debug info together with subsequent @charset definitions + // a comment (or @media statement) before the actual @charset atrule would + // be considered illegal css as it has to be on the first line + if (this.charset) { + if (atRuleNode.debugInfo) { + const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\n/g, '')} */\n`); + comment.debugInfo = atRuleNode.debugInfo; + return this._visitor.visit(comment); + } + + return; + } + + this.charset = true; + } + + return atRuleNode; + }, + checkValidNodes: function checkValidNodes(rules, isRoot) { + if (!rules) { + return; + } + + for (let i = 0; i < rules.length; i++) { + const ruleNode = rules[i]; + + if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) { + throw { + message: 'Properties must be inside selector blocks. They cannot be in the root', + index: ruleNode.getIndex(), + filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename + }; + } + + if (ruleNode instanceof tree.Call) { + throw { + message: `Function '${ruleNode.name}' is undefined`, + index: ruleNode.getIndex(), + filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename + }; + } + + if (ruleNode.type && !ruleNode.allowRoot) { + throw { + message: `${ruleNode.type} node returned by a function is not valid here`, + index: ruleNode.getIndex(), + filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename + }; + } + } + }, + visitRuleset: function visitRuleset(rulesetNode, visitArgs) { + // at this point rulesets are nested into each other + let rule; + const rulesets = []; + this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot); + + if (!rulesetNode.root) { + // remove invisible paths + this._compileRulesetPaths(rulesetNode); // remove rulesets from this ruleset body and compile them separately + + + const nodeRules = rulesetNode.rules; + let nodeRuleCnt = nodeRules ? nodeRules.length : 0; + + for (let i = 0; i < nodeRuleCnt;) { + rule = nodeRules[i]; + + if (rule && rule.rules) { + // visit because we are moving them out from being a child + rulesets.push(this._visitor.visit(rule)); + nodeRules.splice(i, 1); + nodeRuleCnt--; + continue; + } + + i++; + } // accept the visitor to remove rules and refactor itself + // then we can decide nogw whether we want it or not + // compile body + + + if (nodeRuleCnt > 0) { + rulesetNode.accept(this._visitor); + } else { + rulesetNode.rules = null; + } + + visitArgs.visitDeeper = false; + } else { + // if (! rulesetNode.root) { + rulesetNode.accept(this._visitor); + visitArgs.visitDeeper = false; + } + + if (rulesetNode.rules) { + this._mergeRules(rulesetNode.rules); + + this._removeDuplicateRules(rulesetNode.rules); + } // now decide whether we keep the ruleset + + + if (this.utils.isVisibleRuleset(rulesetNode)) { + rulesetNode.ensureVisibility(); + rulesets.splice(0, 0, rulesetNode); + } + + if (rulesets.length === 1) { + return rulesets[0]; + } + + return rulesets; + }, + _compileRulesetPaths: function _compileRulesetPaths(rulesetNode) { + if (rulesetNode.paths) { + rulesetNode.paths = rulesetNode.paths.filter(p => { + let i; + + if (p[0].elements[0].combinator.value === ' ') { + p[0].elements[0].combinator = new tree.Combinator(''); + } + + for (i = 0; i < p.length; i++) { + if (p[i].isVisible() && p[i].getIsOutput()) { + return true; + } + } + + return false; + }); + } + }, + _removeDuplicateRules: function _removeDuplicateRules(rules) { + if (!rules) { + return; + } // remove duplicates + + + const ruleCache = {}; + let ruleList; + let rule; + let i; + + for (i = rules.length - 1; i >= 0; i--) { + rule = rules[i]; + + if (rule instanceof tree.Declaration) { + if (!ruleCache[rule.name]) { + ruleCache[rule.name] = rule; + } else { + ruleList = ruleCache[rule.name]; + + if (ruleList instanceof tree.Declaration) { + ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)]; + } + + const ruleCSS = rule.toCSS(this._context); + + if (ruleList.indexOf(ruleCSS) !== -1) { + rules.splice(i, 1); + } else { + ruleList.push(ruleCSS); + } + } + } + } + }, + _mergeRules: function _mergeRules(rules) { + if (!rules) { + return; + } + + const groups = {}; + const groupsArr = []; + + for (let i = 0; i < rules.length; i++) { + const rule = rules[i]; + + if (rule.merge) { + const key = rule.name; + groups[key] ? rules.splice(i--, 1) : groupsArr.push(groups[key] = []); + groups[key].push(rule); + } + } + + groupsArr.forEach(group => { + if (group.length > 0) { + const result = group[0]; + let space = []; + const comma = [new tree.Expression(space)]; + group.forEach(rule => { + if (rule.merge === '+' && space.length > 0) { + comma.push(new tree.Expression(space = [])); + } + + space.push(rule.value); + result.important = result.important || rule.important; + }); + result.value = new tree.Value(comma); + } + }); + } +}; + +var visitors = { + Visitor, + ImportVisitor, + MarkVisibleSelectorsVisitor: SetTreeVisibilityVisitor, + ExtendVisitor: ProcessExtendsVisitor, + JoinSelectorVisitor, + ToCSSVisitor +}; + +// Split the input into chunks. +var chunker = ((input, fail) => { + const len = input.length; + let level = 0; + let parenLevel = 0; + let lastOpening; + let lastOpeningParen; + let lastMultiComment; + let lastMultiCommentEndBrace; + const chunks = []; + let emitFrom = 0; + let chunkerCurrentIndex; + let currentChunkStartIndex; + let cc; + let cc2; + let matched; + + function emitChunk(force) { + const len = chunkerCurrentIndex - emitFrom; + + if (len < 512 && !force || !len) { + return; + } + + chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1)); + emitFrom = chunkerCurrentIndex + 1; + } + + for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) { + cc = input.charCodeAt(chunkerCurrentIndex); + + if (cc >= 97 && cc <= 122 || cc < 34) { + // a-z or whitespace + continue; + } + + switch (cc) { + case 40: + // ( + parenLevel++; + lastOpeningParen = chunkerCurrentIndex; + continue; + + case 41: + // ) + if (--parenLevel < 0) { + return fail('missing opening `(`', chunkerCurrentIndex); + } + + continue; + + case 59: + // ; + if (!parenLevel) { + emitChunk(); + } + + continue; + + case 123: + // { + level++; + lastOpening = chunkerCurrentIndex; + continue; + + case 125: + // } + if (--level < 0) { + return fail('missing opening `{`', chunkerCurrentIndex); + } + + if (!level && !parenLevel) { + emitChunk(); + } + + continue; + + case 92: + // \ + if (chunkerCurrentIndex < len - 1) { + chunkerCurrentIndex++; + continue; + } + + return fail('unescaped `\\`', chunkerCurrentIndex); + + case 34: + case 39: + case 96: + // ", ' and ` + matched = 0; + currentChunkStartIndex = chunkerCurrentIndex; + + for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) { + cc2 = input.charCodeAt(chunkerCurrentIndex); + + if (cc2 > 96) { + continue; + } + + if (cc2 == cc) { + matched = 1; + break; + } + + if (cc2 == 92) { + // \ + if (chunkerCurrentIndex == len - 1) { + return fail('unescaped `\\`', chunkerCurrentIndex); + } + + chunkerCurrentIndex++; + } + } + + if (matched) { + continue; + } + + return fail(`unmatched \`${String.fromCharCode(cc)}\``, currentChunkStartIndex); + + case 47: + // /, check for comment + if (parenLevel || chunkerCurrentIndex == len - 1) { + continue; + } + + cc2 = input.charCodeAt(chunkerCurrentIndex + 1); + + if (cc2 == 47) { + // //, find lnfeed + for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) { + cc2 = input.charCodeAt(chunkerCurrentIndex); + + if (cc2 <= 13 && (cc2 == 10 || cc2 == 13)) { + break; + } + } + } else if (cc2 == 42) { + // /*, find */ + lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex; + + for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) { + cc2 = input.charCodeAt(chunkerCurrentIndex); + + if (cc2 == 125) { + lastMultiCommentEndBrace = chunkerCurrentIndex; + } + + if (cc2 != 42) { + continue; + } + + if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { + break; + } + } + + if (chunkerCurrentIndex == len - 1) { + return fail('missing closing `*/`', currentChunkStartIndex); + } + + chunkerCurrentIndex++; + } + + continue; + + case 42: + // *, check for unmatched */ + if (chunkerCurrentIndex < len - 1 && input.charCodeAt(chunkerCurrentIndex + 1) == 47) { + return fail('unmatched `/*`', chunkerCurrentIndex); + } + + continue; + } + } + + if (level !== 0) { + if (lastMultiComment > lastOpening && lastMultiCommentEndBrace > lastMultiComment) { + return fail('missing closing `}` or `*/`', lastOpening); + } else { + return fail('missing closing `}`', lastOpening); + } + } else if (parenLevel !== 0) { + return fail('missing closing `)`', lastOpeningParen); + } + + emitChunk(true); + return chunks; +}); + +var getParserInput = (() => { + let // Less input string + input; + let // current chunk + j; + const // holds state for backtracking + saveStack = []; + let // furthest index the parser has gone to + furthest; + let // if this is furthest we got to, this is the probably cause + furthestPossibleErrorMessage; + let // chunkified input + chunks; + let // current chunk + current; + let // index of current chunk, in `input` + currentPos; + const parserInput = {}; + const CHARCODE_SPACE = 32; + const CHARCODE_TAB = 9; + const CHARCODE_LF = 10; + const CHARCODE_CR = 13; + const CHARCODE_PLUS = 43; + const CHARCODE_COMMA = 44; + const CHARCODE_FORWARD_SLASH = 47; + const CHARCODE_9 = 57; + + function skipWhitespace(length) { + const oldi = parserInput.i; + const oldj = j; + const curr = parserInput.i - currentPos; + const endIndex = parserInput.i + current.length - curr; + const mem = parserInput.i += length; + const inp = input; + let c; + let nextChar; + let comment; + + for (; parserInput.i < endIndex; parserInput.i++) { + c = inp.charCodeAt(parserInput.i); + + if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) { + nextChar = inp.charAt(parserInput.i + 1); + + if (nextChar === '/') { + comment = { + index: parserInput.i, + isLineComment: true + }; + let nextNewLine = inp.indexOf('\n', parserInput.i + 2); + + if (nextNewLine < 0) { + nextNewLine = endIndex; + } + + parserInput.i = nextNewLine; + comment.text = inp.substr(comment.index, parserInput.i - comment.index); + parserInput.commentStore.push(comment); + continue; + } else if (nextChar === '*') { + const nextStarSlash = inp.indexOf('*/', parserInput.i + 2); + + if (nextStarSlash >= 0) { + comment = { + index: parserInput.i, + text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i), + isLineComment: false + }; + parserInput.i += comment.text.length - 1; + parserInput.commentStore.push(comment); + continue; + } + } + + break; + } + + if (c !== CHARCODE_SPACE && c !== CHARCODE_LF && c !== CHARCODE_TAB && c !== CHARCODE_CR) { + break; + } + } + + current = current.slice(length + parserInput.i - mem + curr); + currentPos = parserInput.i; + + if (!current.length) { + if (j < chunks.length - 1) { + current = chunks[++j]; + skipWhitespace(0); // skip space at the beginning of a chunk + + return true; // things changed + } + + parserInput.finished = true; + } + + return oldi !== parserInput.i || oldj !== j; + } + + parserInput.save = () => { + currentPos = parserInput.i; + saveStack.push({ + current, + i: parserInput.i, + j + }); + }; + + parserInput.restore = possibleErrorMessage => { + if (parserInput.i > furthest || parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage) { + furthest = parserInput.i; + furthestPossibleErrorMessage = possibleErrorMessage; + } + + const state = saveStack.pop(); + current = state.current; + currentPos = parserInput.i = state.i; + j = state.j; + }; + + parserInput.forget = () => { + saveStack.pop(); + }; + + parserInput.isWhitespace = offset => { + const pos = parserInput.i + (offset || 0); + const code = input.charCodeAt(pos); + return code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF; + }; // Specialization of $(tok) + + + parserInput.$re = tok => { + if (parserInput.i > currentPos) { + current = current.slice(parserInput.i - currentPos); + currentPos = parserInput.i; + } + + const m = tok.exec(current); + + if (!m) { + return null; + } + + skipWhitespace(m[0].length); + + if (typeof m === 'string') { + return m; + } + + return m.length === 1 ? m[0] : m; + }; + + parserInput.$char = tok => { + if (input.charAt(parserInput.i) !== tok) { + return null; + } + + skipWhitespace(1); + return tok; + }; + + parserInput.$str = tok => { + const tokLength = tok.length; // https://jsperf.com/string-startswith/21 + + for (let i = 0; i < tokLength; i++) { + if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { + return null; + } + } + + skipWhitespace(tokLength); + return tok; + }; + + parserInput.$quoted = loc => { + const pos = loc || parserInput.i; + const startChar = input.charAt(pos); + + if (startChar !== '\'' && startChar !== '"') { + return; + } + + const length = input.length; + const currentPosition = pos; + + for (let i = 1; i + currentPosition < length; i++) { + const nextChar = input.charAt(i + currentPosition); + + switch (nextChar) { + case '\\': + i++; + continue; + + case '\r': + case '\n': + break; + + case startChar: + const str = input.substr(currentPosition, i + 1); + + if (!loc && loc !== 0) { + skipWhitespace(i + 1); + return str; + } + + return [startChar, str]; + + default: + } + } + + return null; + }; + /** + * Permissive parsing. Ignores everything except matching {} [] () and quotes + * until matching token (outside of blocks) + */ + + + parserInput.$parseUntil = tok => { + let quote = ''; + let returnVal = null; + let inComment = false; + let blockDepth = 0; + const blockStack = []; + const parseGroups = []; + const length = input.length; + const startPos = parserInput.i; + let lastPos = parserInput.i; + let i = parserInput.i; + let loop = true; + let testChar; + + if (typeof tok === 'string') { + testChar = char => char === tok; + } else { + testChar = char => tok.test(char); + } + + do { + let nextChar = input.charAt(i); + + if (blockDepth === 0 && testChar(nextChar)) { + returnVal = input.substr(lastPos, i - lastPos); + + if (returnVal) { + parseGroups.push(returnVal); + } else { + parseGroups.push(' '); + } + + returnVal = parseGroups; + skipWhitespace(i - startPos); + loop = false; + } else { + if (inComment) { + if (nextChar === '*' && input.charAt(i + 1) === '/') { + i++; + blockDepth--; + inComment = false; + } + + i++; + continue; + } + + switch (nextChar) { + case '\\': + i++; + nextChar = input.charAt(i); + parseGroups.push(input.substr(lastPos, i - lastPos + 1)); + lastPos = i + 1; + break; + + case '/': + if (input.charAt(i + 1) === '*') { + i++; + inComment = true; + blockDepth++; + } + + break; + + case '\'': + case '"': + quote = parserInput.$quoted(i); + + if (quote) { + parseGroups.push(input.substr(lastPos, i - lastPos), quote); + i += quote[1].length - 1; + lastPos = i + 1; + } else { + skipWhitespace(i - startPos); + returnVal = nextChar; + loop = false; + } + + break; + + case '{': + blockStack.push('}'); + blockDepth++; + break; + + case '(': + blockStack.push(')'); + blockDepth++; + break; + + case '[': + blockStack.push(']'); + blockDepth++; + break; + + case '}': + case ')': + case ']': + const expected = blockStack.pop(); + + if (nextChar === expected) { + blockDepth--; + } else { + // move the parser to the error and return expected + skipWhitespace(i - startPos); + returnVal = expected; + loop = false; + } + + } + + i++; + + if (i > length) { + loop = false; + } + } + } while (loop); + + return returnVal ? returnVal : null; + }; + + parserInput.autoCommentAbsorb = true; + parserInput.commentStore = []; + parserInput.finished = false; // Same as $(), but don't change the state of the parser, + // just return the match. + + parserInput.peek = tok => { + if (typeof tok === 'string') { + // https://jsperf.com/string-startswith/21 + for (let i = 0; i < tok.length; i++) { + if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { + return false; + } + } + + return true; + } else { + return tok.test(current); + } + }; // Specialization of peek() + // TODO remove or change some currentChar calls to peekChar + + + parserInput.peekChar = tok => input.charAt(parserInput.i) === tok; + + parserInput.currentChar = () => input.charAt(parserInput.i); + + parserInput.prevChar = () => input.charAt(parserInput.i - 1); + + parserInput.getInput = () => input; + + parserInput.peekNotNumeric = () => { + const c = input.charCodeAt(parserInput.i); // Is the first char of the dimension 0-9, '.', '+' or '-' + + return c > CHARCODE_9 || c < CHARCODE_PLUS || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA; + }; + + parserInput.start = (str, chunkInput, failFunction) => { + input = str; + parserInput.i = j = currentPos = furthest = 0; // chunking apparently makes things quicker (but my tests indicate + // it might actually make things slower in node at least) + // and it is a non-perfect parse - it can't recognise + // unquoted urls, meaning it can't distinguish comments + // meaning comments with quotes or {}() in them get 'counted' + // and then lead to parse errors. + // In addition if the chunking chunks in the wrong place we might + // not be able to parse a parser statement in one go + // this is officially deprecated but can be switched on via an option + // in the case it causes too much performance issues. + + if (chunkInput) { + chunks = chunker(str, failFunction); + } else { + chunks = [str]; + } + + current = chunks[0]; + skipWhitespace(0); + }; + + parserInput.end = () => { + let message; + const isFinished = parserInput.i >= input.length; + + if (parserInput.i < furthest) { + message = furthestPossibleErrorMessage; + parserInput.i = furthest; + } + + return { + isFinished, + furthest: parserInput.i, + furthestPossibleErrorMessage: message, + furthestReachedEnd: parserInput.i >= input.length - 1, + furthestChar: input[parserInput.i] + }; + }; + + return parserInput; +}); + +// less.js - parser +// +// A relatively straight-forward predictive parser. +// There is no tokenization/lexing stage, the input is parsed +// in one sweep. +// +// To make the parser fast enough to run in the browser, several +// optimization had to be made: +// +// - Matching and slicing on a huge input is often cause of slowdowns. +// The solution is to chunkify the input into smaller strings. +// The chunks are stored in the `chunks` var, +// `j` holds the current chunk index, and `currentPos` holds +// the index of the current chunk in relation to `input`. +// This gives us an almost 4x speed-up. +// +// - In many cases, we don't need to match individual tokens; +// for example, if a value doesn't hold any variables, operations +// or dynamic references, the parser can effectively 'skip' it, +// treating it as a literal. +// An example would be '1px solid #000' - which evaluates to itself, +// we don't need to know what the individual components are. +// The drawback, of course is that you don't get the benefits of +// syntax-checking on the CSS. This gives us a 50% speed-up in the parser, +// and a smaller speed-up in the code-gen. +// +// +// Token matching is done with the `$` function, which either takes +// a terminal string or regexp, or a non-terminal function to call. +// It also takes care of moving all the indices forwards. +// + +const Parser = function Parser(context, imports, fileInfo) { + let parsers; + const parserInput = getParserInput(); + + function error(msg, type) { + throw new LessError({ + index: parserInput.i, + filename: fileInfo.filename, + type: type || 'Syntax', + message: msg + }, imports); + } + + function expect(arg, msg) { + // some older browsers return typeof 'function' for RegExp + const result = arg instanceof Function ? arg.call(parsers) : parserInput.$re(arg); + + if (result) { + return result; + } + + error(msg || (typeof arg === 'string' ? `expected '${arg}' got '${parserInput.currentChar()}'` : 'unexpected token')); + } // Specialization of expect() + + + function expectChar(arg, msg) { + if (parserInput.$char(arg)) { + return arg; + } + + error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`); + } + + function getDebugInfo(index) { + const filename = fileInfo.filename; + return { + lineNumber: getLocation(index, parserInput.getInput()).line + 1, + fileName: filename + }; + } + /** + * Used after initial parsing to create nodes on the fly + * + * @param {String} str - string to parse + * @param {Array} parseList - array of parsers to run input through e.g. ["value", "important"] + * @param {Number} currentIndex - start number to begin indexing + * @param {Object} fileInfo - fileInfo to attach to created nodes + */ + + + function parseNode(str, parseList, currentIndex, fileInfo, callback) { + let result; + const returnNodes = []; + const parser = parserInput; + + try { + parser.start(str, false, function fail(msg, index) { + callback({ + message: msg, + index: index + currentIndex + }); + }); + + for (let x = 0, p, i; p = parseList[x]; x++) { + i = parser.i; + result = parsers[p](); + + if (result) { + result._index = i + currentIndex; + result._fileInfo = fileInfo; + returnNodes.push(result); + } else { + returnNodes.push(null); + } + } + + const endInfo = parser.end(); + + if (endInfo.isFinished) { + callback(null, returnNodes); + } else { + callback(true, null); + } + } catch (e) { + throw new LessError({ + index: e.index + currentIndex, + message: e.message + }, imports, fileInfo.filename); + } + } // + // The Parser + // + + + return { + parserInput, + imports, + fileInfo, + parseNode, + // + // Parse an input string into an abstract syntax tree, + // @param str A string containing 'less' markup + // @param callback call `callback` when done. + // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply + // + parse: function parse(str, callback, additionalData) { + let root; + let error = null; + let globalVars; + let modifyVars; + let ignored; + let preText = ''; + globalVars = additionalData && additionalData.globalVars ? `${Parser.serializeVars(additionalData.globalVars)}\n` : ''; + modifyVars = additionalData && additionalData.modifyVars ? `\n${Parser.serializeVars(additionalData.modifyVars)}` : ''; + + if (context.pluginManager) { + const preProcessors = context.pluginManager.getPreProcessors(); + + for (let i = 0; i < preProcessors.length; i++) { + str = preProcessors[i].process(str, { + context, + imports, + fileInfo + }); + } + } + + if (globalVars || additionalData && additionalData.banner) { + preText = (additionalData && additionalData.banner ? additionalData.banner : '') + globalVars; + ignored = imports.contentsIgnoredChars; + ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0; + ignored[fileInfo.filename] += preText.length; + } + + str = str.replace(/\r\n?/g, '\n'); // Remove potential UTF Byte Order Mark + + str = preText + str.replace(/^\uFEFF/, '') + modifyVars; + imports.contents[fileInfo.filename] = str; // Start with the primary rule. + // The whole syntax tree is held under a Ruleset node, + // with the `root` property set to true, so no `{}` are + // output. The callback is called when the input is parsed. + + try { + parserInput.start(str, context.chunkInput, function fail(msg, index) { + throw new LessError({ + index, + type: 'Parse', + message: msg, + filename: fileInfo.filename + }, imports); + }); + tree.Node.prototype.parse = this; + root = new tree.Ruleset(null, this.parsers.primary()); + tree.Node.prototype.rootNode = root; + root.root = true; + root.firstRoot = true; + root.functionRegistry = functionRegistry.inherit(); + } catch (e) { + return callback(new LessError(e, imports, fileInfo.filename)); + } // If `i` is smaller than the `input.length - 1`, + // it means the parser wasn't able to parse the whole + // string, so we've got a parsing error. + // + // We try to extract a \n delimited string, + // showing the line where the parse error occurred. + // We split it up into two parts (the part which parsed, + // and the part which didn't), so we can color them differently. + + + const endInfo = parserInput.end(); + + if (!endInfo.isFinished) { + let message = endInfo.furthestPossibleErrorMessage; + + if (!message) { + message = 'Unrecognised input'; + + if (endInfo.furthestChar === '}') { + message += '. Possibly missing opening \'{\''; + } else if (endInfo.furthestChar === ')') { + message += '. Possibly missing opening \'(\''; + } else if (endInfo.furthestReachedEnd) { + message += '. Possibly missing something'; + } + } + + error = new LessError({ + type: 'Parse', + message, + index: endInfo.furthest, + filename: fileInfo.filename + }, imports); + } + + const finish = e => { + e = error || e || imports.error; + + if (e) { + if (!(e instanceof LessError)) { + e = new LessError(e, imports, fileInfo.filename); + } + + return callback(e); + } else { + return callback(null, root); + } + }; + + if (context.processImports !== false) { + new visitors.ImportVisitor(imports, finish).run(root); + } else { + return finish(); + } + }, + // + // Here in, the parsing rules/functions + // + // The basic structure of the syntax tree generated is as follows: + // + // Ruleset -> Declaration -> Value -> Expression -> Entity + // + // Here's some Less code: + // + // .class { + // color: #fff; + // border: 1px solid #000; + // width: @w + 4px; + // > .child {...} + // } + // + // And here's what the parse tree might look like: + // + // Ruleset (Selector '.class', [ + // Declaration ("color", Value ([Expression [Color #fff]])) + // Declaration ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]])) + // Declaration ("width", Value ([Expression [Operation " + " [Variable "@w"][Dimension 4px]]])) + // Ruleset (Selector [Element '>', '.child'], [...]) + // ]) + // + // In general, most rules will try to parse a token with the `$re()` function, and if the return + // value is truly, will return a new node, of the relevant type. Sometimes, we need to check + // first, before parsing, that's when we use `peek()`. + // + parsers: parsers = { + // + // The `primary` rule is the *entry* and *exit* point of the parser. + // The rules here can appear at any level of the parse tree. + // + // The recursive nature of the grammar is an interplay between the `block` + // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule, + // as represented by this simplified grammar: + // + // primary → (ruleset | declaration)+ + // ruleset → selector+ block + // block → '{' primary '}' + // + // Only at one point is the primary rule not called from the + // block rule: at the root level. + // + primary: function primary() { + const mixin = this.mixin; + let root = []; + let node; + + while (true) { + while (true) { + node = this.comment(); + + if (!node) { + break; + } + + root.push(node); + } // always process comments before deciding if finished + + + if (parserInput.finished) { + break; + } + + if (parserInput.peek('}')) { + break; + } + + node = this.extendRule(); + + if (node) { + root = root.concat(node); + continue; + } + + node = mixin.definition() || this.declaration() || this.ruleset() || mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule(); + + if (node) { + root.push(node); + } else { + let foundSemiColon = false; + + while (parserInput.$char(';')) { + foundSemiColon = true; + } + + if (!foundSemiColon) { + break; + } + } + } + + return root; + }, + // comments are collected by the main parsing mechanism and then assigned to nodes + // where the current structure allows it + comment: function comment() { + if (parserInput.commentStore.length) { + const comment = parserInput.commentStore.shift(); + return new tree.Comment(comment.text, comment.isLineComment, comment.index, fileInfo); + } + }, + // + // Entities are tokens which can be found inside an Expression + // + entities: { + mixinLookup: function mixinLookup() { + return parsers.mixin.call(true, true); + }, + // + // A string, which supports escaping " and ' + // + // "milky way" 'he\'s the one!' + // + quoted: function quoted(forceEscaped) { + let str; + const index = parserInput.i; + let isEscaped = false; + parserInput.save(); + + if (parserInput.$char('~')) { + isEscaped = true; + } else if (forceEscaped) { + parserInput.restore(); + return; + } + + str = parserInput.$quoted(); + + if (!str) { + parserInput.restore(); + return; + } + + parserInput.forget(); + return new tree.Quoted(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo); + }, + // + // A catch-all word, such as: + // + // black border-collapse + // + keyword: function keyword() { + const k = parserInput.$char('%') || parserInput.$re(/^\[?(?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\]?/); + + if (k) { + return tree.Color.fromKeyword(k) || new tree.Keyword(k); + } + }, + // + // A function call + // + // rgb(255, 0, 255) + // + // The arguments are parsed with the `entities.arguments` parser. + // + call: function call() { + let name; + let args; + let func; + const index = parserInput.i; // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 + + if (parserInput.peek(/^url\(/i)) { + return; + } + + parserInput.save(); + name = parserInput.$re(/^([\w-]+|%|progid:[\w\.]+)\(/); + + if (!name) { + parserInput.forget(); + return; + } + + name = name[1]; + func = this.customFuncCall(name); + + if (func) { + args = func.parse(); + + if (args && func.stop) { + parserInput.forget(); + return args; + } + } + + args = this.arguments(args); + + if (!parserInput.$char(')')) { + parserInput.restore('Could not parse call arguments or missing \')\''); + return; + } + + parserInput.forget(); + return new tree.Call(name, args, index, fileInfo); + }, + // + // Parsing rules for functions with non-standard args, e.g.: + // + // boolean(not(2 > 1)) + // + // This is a quick prototype, to be modified/improved when + // more custom-parsed funcs come (e.g. `selector(...)`) + // + customFuncCall: function customFuncCall(name) { + /* Ideally the table is to be moved out of here for faster perf., + but it's quite tricky since it relies on all these `parsers` + and `expect` available only here */ + return { + alpha: f(parsers.ieAlpha, true), + boolean: f(condition), + 'if': f(condition) + }[name.toLowerCase()]; + + function f(parse, stop) { + return { + parse, + // parsing function + stop // when true - stop after parse() and return its result, + // otherwise continue for plain args + + }; + } + + function condition() { + return [expect(parsers.condition, 'expected condition')]; + } + }, + arguments: function _arguments(prevArgs) { + let argsComma = prevArgs || []; + const argsSemiColon = []; + let isSemiColonSeparated; + let value; + parserInput.save(); + + while (true) { + if (prevArgs) { + prevArgs = false; + } else { + value = parsers.detachedRuleset() || this.assignment() || parsers.expression(); + + if (!value) { + break; + } + + if (value.value && value.value.length == 1) { + value = value.value[0]; + } + + argsComma.push(value); + } + + if (parserInput.$char(',')) { + continue; + } + + if (parserInput.$char(';') || isSemiColonSeparated) { + isSemiColonSeparated = true; + value = argsComma.length < 1 ? argsComma[0] : new tree.Value(argsComma); + argsSemiColon.push(value); + argsComma = []; + } + } + + parserInput.forget(); + return isSemiColonSeparated ? argsSemiColon : argsComma; + }, + literal: function literal() { + return this.dimension() || this.color() || this.quoted() || this.unicodeDescriptor(); + }, + // Assignments are argument entities for calls. + // They are present in ie filter properties as shown below. + // + // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* ) + // + assignment: function assignment() { + let key; + let value; + parserInput.save(); + key = parserInput.$re(/^\w+(?=\s?=)/i); + + if (!key) { + parserInput.restore(); + return; + } + + if (!parserInput.$char('=')) { + parserInput.restore(); + return; + } + + value = parsers.entity(); + + if (value) { + parserInput.forget(); + return new tree.Assignment(key, value); + } else { + parserInput.restore(); + } + }, + // + // Parse url() tokens + // + // We use a specific rule for urls, because they don't really behave like + // standard function calls. The difference is that the argument doesn't have + // to be enclosed within a string, so it can't be parsed as an Expression. + // + url: function url() { + let value; + const index = parserInput.i; + parserInput.autoCommentAbsorb = false; + + if (!parserInput.$str('url(')) { + parserInput.autoCommentAbsorb = true; + return; + } + + value = this.quoted() || this.variable() || this.property() || parserInput.$re(/^(?:(?:\\[\(\)'"])|[^\(\)'"])+/) || ''; + parserInput.autoCommentAbsorb = true; + expectChar(')'); + return new tree.URL(value.value != null || value instanceof tree.Variable || value instanceof tree.Property ? value : new tree.Anonymous(value, index), index, fileInfo); + }, + // + // A Variable entity, such as `@fink`, in + // + // width: @fink + 2px + // + // We use a different parser for variable definitions, + // see `parsers.variable`. + // + variable: function variable() { + let ch; + let name; + const index = parserInput.i; + parserInput.save(); + + if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\w-]+/))) { + ch = parserInput.currentChar(); + + if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\s/)) { + // this may be a VariableCall lookup + const result = parsers.variableCall(name); + + if (result) { + parserInput.forget(); + return result; + } + } + + parserInput.forget(); + return new tree.Variable(name, index, fileInfo); + } + + parserInput.restore(); + }, + // A variable entity using the protective {} e.g. @{var} + variableCurly: function variableCurly() { + let curly; + const index = parserInput.i; + + if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\{([\w-]+)\}/))) { + return new tree.Variable(`@${curly[1]}`, index, fileInfo); + } + }, + // + // A Property accessor, such as `$color`, in + // + // background-color: $color + // + property: function property() { + let name; + const index = parserInput.i; + + if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\$[\w-]+/))) { + return new tree.Property(name, index, fileInfo); + } + }, + // A property entity useing the protective {} e.g. ${prop} + propertyCurly: function propertyCurly() { + let curly; + const index = parserInput.i; + + if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\$\{([\w-]+)\}/))) { + return new tree.Property(`$${curly[1]}`, index, fileInfo); + } + }, + // + // A Hexadecimal color + // + // #4F3C2F + // + // `rgb` and `hsl` colors are parsed through the `entities.call` parser. + // + color: function color() { + let rgb; + parserInput.save(); + + if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\w.#\[])?/))) { + if (!rgb[2]) { + parserInput.forget(); + return new tree.Color(rgb[1], undefined, rgb[0]); + } + } + + parserInput.restore(); + }, + colorKeyword: function colorKeyword() { + parserInput.save(); + const autoCommentAbsorb = parserInput.autoCommentAbsorb; + parserInput.autoCommentAbsorb = false; + const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/); + parserInput.autoCommentAbsorb = autoCommentAbsorb; + + if (!k) { + parserInput.forget(); + return; + } + + parserInput.restore(); + const color = tree.Color.fromKeyword(k); + + if (color) { + parserInput.$str(k); + return color; + } + }, + // + // A Dimension, that is, a number and a unit + // + // 0.5em 95% + // + dimension: function dimension() { + if (parserInput.peekNotNumeric()) { + return; + } + + const value = parserInput.$re(/^([+-]?\d*\.?\d+)(%|[a-z_]+)?/i); + + if (value) { + return new tree.Dimension(value[1], value[2]); + } + }, + // + // A unicode descriptor, as is used in unicode-range + // + // U+0?? or U+00A1-00A9 + // + unicodeDescriptor: function unicodeDescriptor() { + let ud; + ud = parserInput.$re(/^U\+[0-9a-fA-F?]+(\-[0-9a-fA-F?]+)?/); + + if (ud) { + return new tree.UnicodeDescriptor(ud[0]); + } + }, + // + // JavaScript code to be evaluated + // + // `window.location.href` + // + javascript: function javascript() { + let js; + const index = parserInput.i; + parserInput.save(); + const escape = parserInput.$char('~'); + const jsQuote = parserInput.$char('`'); + + if (!jsQuote) { + parserInput.restore(); + return; + } + + js = parserInput.$re(/^[^`]*`/); + + if (js) { + parserInput.forget(); + return new tree.JavaScript(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo); + } + + parserInput.restore('invalid javascript definition'); + } + }, + // + // The variable part of a variable definition. Used in the `rule` parser + // + // @fink: + // + variable: function variable() { + let name; + + if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\w-]+)\s*:/))) { + return name[1]; + } + }, + // + // Call a variable value to retrieve a detached ruleset + // or a value from a detached ruleset's rules. + // + // @fink(); + // @fink; + // color: @fink[@color]; + // + variableCall: function variableCall(parsedName) { + let lookups; + let important; + const i = parserInput.i; + const inValue = !!parsedName; + let name = parsedName; + parserInput.save(); + + if (name || parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\w-]+)(\(\s*\))?/))) { + lookups = this.mixin.ruleLookups(); + + if (!lookups && (inValue && parserInput.$str('()') !== '()' || name[2] !== '()')) { + parserInput.restore('Missing \'[...]\' lookup in variable call'); + return; + } + + if (!inValue) { + name = name[1]; + } + + if (lookups && parsers.important()) { + important = true; + } + + const call = new tree.VariableCall(name, i, fileInfo); + + if (!inValue && parsers.end()) { + parserInput.forget(); + return call; + } else { + parserInput.forget(); + return new tree.NamespaceValue(call, lookups, important, i, fileInfo); + } + } + + parserInput.restore(); + }, + // + // extend syntax - used to extend selectors + // + extend: function extend(isRule) { + let elements; + let e; + const index = parserInput.i; + let option; + let extendList; + let extend; + + if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) { + return; + } + + do { + option = null; + elements = null; + + while (!(option = parserInput.$re(/^(all)(?=\s*(\)|,))/))) { + e = this.element(); + + if (!e) { + break; + } + + if (elements) { + elements.push(e); + } else { + elements = [e]; + } + } + + option = option && option[1]; + + if (!elements) { + error('Missing target selector for :extend().'); + } + + extend = new tree.Extend(new tree.Selector(elements), option, index, fileInfo); + + if (extendList) { + extendList.push(extend); + } else { + extendList = [extend]; + } + } while (parserInput.$char(',')); + + expect(/^\)/); + + if (isRule) { + expect(/^;/); + } + + return extendList; + }, + // + // extendRule - used in a rule to extend all the parent selectors + // + extendRule: function extendRule() { + return this.extend(true); + }, + // + // Mixins + // + mixin: { + // + // A Mixin call, with an optional argument list + // + // #mixins > .square(#fff); + // #mixins.square(#fff); + // .rounded(4px, black); + // .button; + // + // We can lookup / return a value using the lookup syntax: + // + // color: #mixin.square(#fff)[@color]; + // + // The `while` loop is there because mixins can be + // namespaced, but we only support the child and descendant + // selector for now. + // + call: function call(inValue, getLookup) { + const s = parserInput.currentChar(); + let important = false; + let lookups; + const index = parserInput.i; + let elements; + let args; + let hasParens; + + if (s !== '.' && s !== '#') { + return; + } + + parserInput.save(); // stop us absorbing part of an invalid selector + + elements = this.elements(); + + if (elements) { + if (parserInput.$char('(')) { + args = this.args(true).args; + expectChar(')'); + hasParens = true; + } + + if (getLookup !== false) { + lookups = this.ruleLookups(); + } + + if (getLookup === true && !lookups) { + parserInput.restore(); + return; + } + + if (inValue && !lookups && !hasParens) { + // This isn't a valid in-value mixin call + parserInput.restore(); + return; + } + + if (!inValue && parsers.important()) { + important = true; + } + + if (inValue || parsers.end()) { + parserInput.forget(); + const mixin = new tree.mixin.Call(elements, args, index, fileInfo, !lookups && important); + + if (lookups) { + return new tree.NamespaceValue(mixin, lookups, important); + } else { + return mixin; + } + } + } + + parserInput.restore(); + }, + + /** + * Matching elements for mixins + * (Start with . or # and can have > ) + */ + elements: function elements() { + let elements; + let e; + let c; + let elem; + let elemIndex; + const re = /^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/; + + while (true) { + elemIndex = parserInput.i; + e = parserInput.$re(re); + + if (!e) { + break; + } + + elem = new tree.Element(c, e, false, elemIndex, fileInfo); + + if (elements) { + elements.push(elem); + } else { + elements = [elem]; + } + + c = parserInput.$char('>'); + } + + return elements; + }, + args: function args(isCall) { + const entities = parsers.entities; + const returner = { + args: null, + variadic: false + }; + let expressions = []; + const argsSemiColon = []; + const argsComma = []; + let isSemiColonSeparated; + let expressionContainsNamed; + let name; + let nameLoop; + let value; + let arg; + let expand; + let hasSep = true; + parserInput.save(); + + while (true) { + if (isCall) { + arg = parsers.detachedRuleset() || parsers.expression(); + } else { + parserInput.commentStore.length = 0; + + if (parserInput.$str('...')) { + returner.variadic = true; + + if (parserInput.$char(';') && !isSemiColonSeparated) { + isSemiColonSeparated = true; + } + + (isSemiColonSeparated ? argsSemiColon : argsComma).push({ + variadic: true + }); + break; + } + + arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true); + } + + if (!arg || !hasSep) { + break; + } + + nameLoop = null; + + if (arg.throwAwayComments) { + arg.throwAwayComments(); + } + + value = arg; + let val = null; + + if (isCall) { + // Variable + if (arg.value && arg.value.length == 1) { + val = arg.value[0]; + } + } else { + val = arg; + } + + if (val && (val instanceof tree.Variable || val instanceof tree.Property)) { + if (parserInput.$char(':')) { + if (expressions.length > 0) { + if (isSemiColonSeparated) { + error('Cannot mix ; and , as delimiter types'); + } + + expressionContainsNamed = true; + } + + value = parsers.detachedRuleset() || parsers.expression(); + + if (!value) { + if (isCall) { + error('could not understand value for named argument'); + } else { + parserInput.restore(); + returner.args = []; + return returner; + } + } + + nameLoop = name = val.name; + } else if (parserInput.$str('...')) { + if (!isCall) { + returner.variadic = true; + + if (parserInput.$char(';') && !isSemiColonSeparated) { + isSemiColonSeparated = true; + } + + (isSemiColonSeparated ? argsSemiColon : argsComma).push({ + name: arg.name, + variadic: true + }); + break; + } else { + expand = true; + } + } else if (!isCall) { + name = nameLoop = val.name; + value = null; + } + } + + if (value) { + expressions.push(value); + } + + argsComma.push({ + name: nameLoop, + value, + expand + }); + + if (parserInput.$char(',')) { + hasSep = true; + continue; + } + + hasSep = parserInput.$char(';') === ';'; + + if (hasSep || isSemiColonSeparated) { + if (expressionContainsNamed) { + error('Cannot mix ; and , as delimiter types'); + } + + isSemiColonSeparated = true; + + if (expressions.length > 1) { + value = new tree.Value(expressions); + } + + argsSemiColon.push({ + name, + value, + expand + }); + name = null; + expressions = []; + expressionContainsNamed = false; + } + } + + parserInput.forget(); + returner.args = isSemiColonSeparated ? argsSemiColon : argsComma; + return returner; + }, + // + // A Mixin definition, with a list of parameters + // + // .rounded (@radius: 2px, @color) { + // ... + // } + // + // Until we have a finer grained state-machine, we have to + // do a look-ahead, to make sure we don't have a mixin call. + // See the `rule` function for more information. + // + // We start by matching `.rounded (`, and then proceed on to + // the argument list, which has optional default values. + // We store the parameters in `params`, with a `value` key, + // if there is a value, such as in the case of `@radius`. + // + // Once we've got our params list, and a closing `)`, we parse + // the `{...}` block. + // + definition: function definition() { + let name; + let params = []; + let match; + let ruleset; + let cond; + let variadic = false; + + if (parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#' || parserInput.peek(/^[^{]*\}/)) { + return; + } + + parserInput.save(); + match = parserInput.$re(/^([#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/); + + if (match) { + name = match[1]; + const argInfo = this.args(false); + params = argInfo.args; + variadic = argInfo.variadic; // .mixincall("@{a}"); + // looks a bit like a mixin definition.. + // also + // .mixincall(@a: {rule: set;}); + // so we have to be nice and restore + + if (!parserInput.$char(')')) { + parserInput.restore('Missing closing \')\''); + return; + } + + parserInput.commentStore.length = 0; + + if (parserInput.$str('when')) { + // Guard + cond = expect(parsers.conditions, 'expected condition'); + } + + ruleset = parsers.block(); + + if (ruleset) { + parserInput.forget(); + return new tree.mixin.Definition(name, params, ruleset, cond, variadic); + } else { + parserInput.restore(); + } + } else { + parserInput.forget(); + } + }, + ruleLookups: function ruleLookups() { + let rule; + const lookups = []; + + if (parserInput.currentChar() !== '[') { + return; + } + + while (true) { + parserInput.save(); + rule = this.lookupValue(); + + if (!rule && rule !== '') { + parserInput.restore(); + break; + } + + lookups.push(rule); + parserInput.forget(); + } + + if (lookups.length > 0) { + return lookups; + } + }, + lookupValue: function lookupValue() { + parserInput.save(); + + if (!parserInput.$char('[')) { + parserInput.restore(); + return; + } + + const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/); + + if (!parserInput.$char(']')) { + parserInput.restore(); + return; + } + + if (name || name === '') { + parserInput.forget(); + return name; + } + + parserInput.restore(); + } + }, + // + // Entities are the smallest recognized token, + // and can be found inside a rule's value. + // + entity: function entity() { + const entities = this.entities; + return this.comment() || entities.literal() || entities.variable() || entities.url() || entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) || entities.javascript(); + }, + // + // A Declaration terminator. Note that we use `peek()` to check for '}', + // because the `block` rule will be expecting it, but we still need to make sure + // it's there, if ';' was omitted. + // + end: function end() { + return parserInput.$char(';') || parserInput.peek('}'); + }, + // + // IE's alpha function + // + // alpha(opacity=88) + // + ieAlpha: function ieAlpha() { + let value; // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 + + if (!parserInput.$re(/^opacity=/i)) { + return; + } + + value = parserInput.$re(/^\d+/); + + if (!value) { + value = expect(parsers.entities.variable, 'Could not parse alpha'); + value = `@{${value.name.slice(1)}}`; + } + + expectChar(')'); + return new tree.Quoted('', `alpha(opacity=${value})`); + }, + // + // A Selector Element + // + // div + // + h1 + // #socks + // input[type="text"] + // + // Elements are the building blocks for Selectors, + // they are made out of a `Combinator` (see combinator rule), + // and an element name, such as a tag a class, or `*`. + // + element: function element() { + let e; + let c; + let v; + const index = parserInput.i; + c = this.combinator(); + e = parserInput.$re(/^(?:\d+\.\d+|\d+)%/) || parserInput.$re(/^(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) || parserInput.$char('*') || parserInput.$char('&') || this.attribute() || parserInput.$re(/^\([^&()@]+\)/) || parserInput.$re(/^[\.#:](?=@)/) || this.entities.variableCurly(); + + if (!e) { + parserInput.save(); + + if (parserInput.$char('(')) { + if ((v = this.selector(false)) && parserInput.$char(')')) { + e = new tree.Paren(v); + parserInput.forget(); + } else { + parserInput.restore('Missing closing \')\''); + } + } else { + parserInput.forget(); + } + } + + if (e) { + return new tree.Element(c, e, e instanceof tree.Variable, index, fileInfo); + } + }, + // + // Combinators combine elements together, in a Selector. + // + // Because our parser isn't white-space sensitive, special care + // has to be taken, when parsing the descendant combinator, ` `, + // as it's an empty space. We have to check the previous character + // in the input, to see if it's a ` ` character. More info on how + // we deal with this in *combinator.js*. + // + combinator: function combinator() { + let c = parserInput.currentChar(); + + if (c === '/') { + parserInput.save(); + const slashedCombinator = parserInput.$re(/^\/[a-z]+\//i); + + if (slashedCombinator) { + parserInput.forget(); + return new tree.Combinator(slashedCombinator); + } + + parserInput.restore(); + } + + if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') { + parserInput.i++; + + if (c === '^' && parserInput.currentChar() === '^') { + c = '^^'; + parserInput.i++; + } + + while (parserInput.isWhitespace()) { + parserInput.i++; + } + + return new tree.Combinator(c); + } else if (parserInput.isWhitespace(-1)) { + return new tree.Combinator(' '); + } else { + return new tree.Combinator(null); + } + }, + // + // A CSS Selector + // with less extensions e.g. the ability to extend and guard + // + // .class > div + h1 + // li a:hover + // + // Selectors are made out of one or more Elements, see above. + // + selector: function selector(isLess) { + const index = parserInput.i; + let elements; + let extendList; + let c; + let e; + let allExtends; + let when; + let condition; + isLess = isLess !== false; + + while (isLess && (extendList = this.extend()) || isLess && (when = parserInput.$str('when')) || (e = this.element())) { + if (when) { + condition = expect(this.conditions, 'expected condition'); + } else if (condition) { + error('CSS guard can only be used at the end of selector'); + } else if (extendList) { + if (allExtends) { + allExtends = allExtends.concat(extendList); + } else { + allExtends = extendList; + } + } else { + if (allExtends) { + error('Extend can only be used at the end of selector'); + } + + c = parserInput.currentChar(); + + if (elements) { + elements.push(e); + } else { + elements = [e]; + } + + e = null; + } + + if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') { + break; + } + } + + if (elements) { + return new tree.Selector(elements, allExtends, condition, index, fileInfo); + } + + if (allExtends) { + error('Extend must be used to extend a selector, it cannot be used on its own'); + } + }, + selectors: function selectors() { + let s; + let selectors; + + while (true) { + s = this.selector(); + + if (!s) { + break; + } + + if (selectors) { + selectors.push(s); + } else { + selectors = [s]; + } + + parserInput.commentStore.length = 0; + + if (s.condition && selectors.length > 1) { + error("Guards are only currently allowed on a single selector."); + } + + if (!parserInput.$char(',')) { + break; + } + + if (s.condition) { + error("Guards are only currently allowed on a single selector."); + } + + parserInput.commentStore.length = 0; + } + + return selectors; + }, + attribute: function attribute() { + if (!parserInput.$char('[')) { + return; + } + + const entities = this.entities; + let key; + let val; + let op; + + if (!(key = entities.variableCurly())) { + key = expect(/^(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\.)+/); + } + + op = parserInput.$re(/^[|~*$^]?=/); + + if (op) { + val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\w-]+/) || entities.variableCurly(); + } + + expectChar(']'); + return new tree.Attribute(key, op, val); + }, + // + // The `block` rule is used by `ruleset` and `mixin.definition`. + // It's a wrapper around the `primary` rule, with added `{}`. + // + block: function block() { + let content; + + if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) { + return content; + } + }, + blockRuleset: function blockRuleset() { + let block = this.block(); + + if (block) { + block = new tree.Ruleset(null, block); + } + + return block; + }, + detachedRuleset: function detachedRuleset() { + let argInfo; + let params; + let variadic; + parserInput.save(); + + if (parserInput.$re(/^[.#]\(/)) { + /** + * DR args currently only implemented for each() function, and not + * yet settable as `@dr: #(@arg) {}` + * This should be done when DRs are merged with mixins. + * See: https://github.com/less/less-meta/issues/16 + */ + argInfo = this.mixin.args(false); + params = argInfo.args; + variadic = argInfo.variadic; + + if (!parserInput.$char(')')) { + parserInput.restore(); + return; + } + } + + const blockRuleset = this.blockRuleset(); + + if (blockRuleset) { + parserInput.forget(); + + if (params) { + return new tree.mixin.Definition(null, params, blockRuleset, null, variadic); + } + + return new tree.DetachedRuleset(blockRuleset); + } + + parserInput.restore(); + }, + // + // div, .class, body > p {...} + // + ruleset: function ruleset() { + let selectors; + let rules; + let debugInfo; + parserInput.save(); + + if (context.dumpLineNumbers) { + debugInfo = getDebugInfo(parserInput.i); + } + + selectors = this.selectors(); + + if (selectors && (rules = this.block())) { + parserInput.forget(); + const ruleset = new tree.Ruleset(selectors, rules, context.strictImports); + + if (context.dumpLineNumbers) { + ruleset.debugInfo = debugInfo; + } + + return ruleset; + } else { + parserInput.restore(); + } + }, + declaration: function declaration() { + let name; + let value; + const index = parserInput.i; + let hasDR; + const c = parserInput.currentChar(); + let important; + let merge; + let isVariable; + + if (c === '.' || c === '#' || c === '&' || c === ':') { + return; + } + + parserInput.save(); + name = this.variable() || this.ruleProperty(); + + if (name) { + isVariable = typeof name === 'string'; + + if (isVariable) { + value = this.detachedRuleset(); + + if (value) { + hasDR = true; + } + } + + parserInput.commentStore.length = 0; + + if (!value) { + // a name returned by this.ruleProperty() is always an array of the form: + // [string-1, ..., string-n, ""] or [string-1, ..., string-n, "+"] + // where each item is a tree.Keyword or tree.Variable + merge = !isVariable && name.length > 1 && name.pop().value; // Custom property values get permissive parsing + + if (name[0].value && name[0].value.slice(0, 2) === '--') { + value = this.permissiveValue(); + } // Try to store values as anonymous + // If we need the value later we'll re-parse it in ruleset.parseValue + else { + value = this.anonymousValue(); + } + + if (value) { + parserInput.forget(); // anonymous values absorb the end ';' which is required for them to work + + return new tree.Declaration(name, value, false, merge, index, fileInfo); + } + + if (!value) { + value = this.value(); + } + + if (value) { + important = this.important(); + } else if (isVariable) { + // As a last resort, try permissiveValue + value = this.permissiveValue(); + } + } + + if (value && (this.end() || hasDR)) { + parserInput.forget(); + return new tree.Declaration(name, value, important, merge, index, fileInfo); + } else { + parserInput.restore(); + } + } else { + parserInput.restore(); + } + }, + anonymousValue: function anonymousValue() { + const index = parserInput.i; + const match = parserInput.$re(/^([^.#@\$+\/'"*`(;{}-]*);/); + + if (match) { + return new tree.Anonymous(match[1], index); + } + }, + + /** + * Used for custom properties, at-rules, and variables (as fallback) + * Parses almost anything inside of {} [] () "" blocks + * until it reaches outer-most tokens. + * + * First, it will try to parse comments and entities to reach + * the end. This is mostly like the Expression parser except no + * math is allowed. + */ + permissiveValue: function permissiveValue(untilTokens) { + let i; + let e; + let done; + let value; + const tok = untilTokens || ';'; + const index = parserInput.i; + const result = []; + + function testCurrentChar() { + const char = parserInput.currentChar(); + + if (typeof tok === 'string') { + return char === tok; + } else { + return tok.test(char); + } + } + + if (testCurrentChar()) { + return; + } + + value = []; + + do { + e = this.comment(); + + if (e) { + value.push(e); + continue; + } + + e = this.entity(); + + if (e) { + value.push(e); + } + } while (e); + + done = testCurrentChar(); + + if (value.length > 0) { + value = new tree.Expression(value); + + if (done) { + return value; + } else { + result.push(value); + } // Preserve space before $parseUntil as it will not + + + if (parserInput.prevChar() === ' ') { + result.push(new tree.Anonymous(' ', index)); + } + } + + parserInput.save(); + value = parserInput.$parseUntil(tok); + + if (value) { + if (typeof value === 'string') { + error(`Expected '${value}'`, 'Parse'); + } + + if (value.length === 1 && value[0] === ' ') { + parserInput.forget(); + return new tree.Anonymous('', index); + } + + let item; + + for (i = 0; i < value.length; i++) { + item = value[i]; + + if (Array.isArray(item)) { + // Treat actual quotes as normal quoted values + result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo)); + } else { + if (i === value.length - 1) { + item = item.trim(); + } // Treat like quoted values, but replace vars like unquoted expressions + + + const quote = new tree.Quoted('\'', item, true, index, fileInfo); + quote.variableRegex = /@([\w-]+)/g; + quote.propRegex = /\$([\w-]+)/g; + result.push(quote); + } + } + + parserInput.forget(); + return new tree.Expression(result, true); + } + + parserInput.restore(); + }, + // + // An @import atrule + // + // @import "lib"; + // + // Depending on our environment, importing is done differently: + // In the browser, it's an XHR request, in Node, it would be a + // file-system operation. The function used for importing is + // stored in `import`, which we pass to the Import constructor. + // + 'import': function _import() { + let path; + let features; + const index = parserInput.i; + const dir = parserInput.$re(/^@import?\s+/); + + if (dir) { + const options = (dir ? this.importOptions() : null) || {}; + + if (path = this.entities.quoted() || this.entities.url()) { + features = this.mediaFeatures(); + + if (!parserInput.$char(';')) { + parserInput.i = index; + error('missing semi-colon or unrecognised media features on import'); + } + + features = features && new tree.Value(features); + return new tree.Import(path, features, options, index, fileInfo); + } else { + parserInput.i = index; + error('malformed import statement'); + } + } + }, + importOptions: function importOptions() { + let o; + const options = {}; + let optionName; + let value; // list of options, surrounded by parens + + if (!parserInput.$char('(')) { + return null; + } + + do { + o = this.importOption(); + + if (o) { + optionName = o; + value = true; + + switch (optionName) { + case 'css': + optionName = 'less'; + value = false; + break; + + case 'once': + optionName = 'multiple'; + value = false; + break; + } + + options[optionName] = value; + + if (!parserInput.$char(',')) { + break; + } + } + } while (o); + + expectChar(')'); + return options; + }, + importOption: function importOption() { + const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/); + + if (opt) { + return opt[1]; + } + }, + mediaFeature: function mediaFeature() { + const entities = this.entities; + const nodes = []; + let e; + let p; + parserInput.save(); + + do { + e = entities.keyword() || entities.variable() || entities.mixinLookup(); + + if (e) { + nodes.push(e); + } else if (parserInput.$char('(')) { + p = this.property(); + e = this.value(); + + if (parserInput.$char(')')) { + if (p && e) { + nodes.push(new tree.Paren(new tree.Declaration(p, e, null, null, parserInput.i, fileInfo, true))); + } else if (e) { + nodes.push(new tree.Paren(e)); + } else { + error('badly formed media feature definition'); + } + } else { + error('Missing closing \')\'', 'Parse'); + } + } + } while (e); + + parserInput.forget(); + + if (nodes.length > 0) { + return new tree.Expression(nodes); + } + }, + mediaFeatures: function mediaFeatures() { + const entities = this.entities; + const features = []; + let e; + + do { + e = this.mediaFeature(); + + if (e) { + features.push(e); + + if (!parserInput.$char(',')) { + break; + } + } else { + e = entities.variable() || entities.mixinLookup(); + + if (e) { + features.push(e); + + if (!parserInput.$char(',')) { + break; + } + } + } + } while (e); + + return features.length > 0 ? features : null; + }, + media: function media() { + let features; + let rules; + let media; + let debugInfo; + const index = parserInput.i; + + if (context.dumpLineNumbers) { + debugInfo = getDebugInfo(index); + } + + parserInput.save(); + + if (parserInput.$str('@media')) { + features = this.mediaFeatures(); + rules = this.block(); + + if (!rules) { + error('media definitions require block statements after any features'); + } + + parserInput.forget(); + media = new tree.Media(rules, features, index, fileInfo); + + if (context.dumpLineNumbers) { + media.debugInfo = debugInfo; + } + + return media; + } + + parserInput.restore(); + }, + // + // A @plugin directive, used to import plugins dynamically. + // + // @plugin (args) "lib"; + // + plugin: function plugin() { + let path; + let args; + let options; + const index = parserInput.i; + const dir = parserInput.$re(/^@plugin?\s+/); + + if (dir) { + args = this.pluginArgs(); + + if (args) { + options = { + pluginArgs: args, + isPlugin: true + }; + } else { + options = { + isPlugin: true + }; + } + + if (path = this.entities.quoted() || this.entities.url()) { + if (!parserInput.$char(';')) { + parserInput.i = index; + error('missing semi-colon on @plugin'); + } + + return new tree.Import(path, null, options, index, fileInfo); + } else { + parserInput.i = index; + error('malformed @plugin statement'); + } + } + }, + pluginArgs: function pluginArgs() { + // list of options, surrounded by parens + parserInput.save(); + + if (!parserInput.$char('(')) { + parserInput.restore(); + return null; + } + + const args = parserInput.$re(/^\s*([^\);]+)\)\s*/); + + if (args[1]) { + parserInput.forget(); + return args[1].trim(); + } else { + parserInput.restore(); + return null; + } + }, + // + // A CSS AtRule + // + // @charset "utf-8"; + // + atrule: function atrule() { + const index = parserInput.i; + let name; + let value; + let rules; + let nonVendorSpecificName; + let hasIdentifier; + let hasExpression; + let hasUnknown; + let hasBlock = true; + let isRooted = true; + + if (parserInput.currentChar() !== '@') { + return; + } + + value = this['import']() || this.plugin() || this.media(); + + if (value) { + return value; + } + + parserInput.save(); + name = parserInput.$re(/^@[a-z-]+/); + + if (!name) { + return; + } + + nonVendorSpecificName = name; + + if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) { + nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`; + } + + switch (nonVendorSpecificName) { + case '@charset': + hasIdentifier = true; + hasBlock = false; + break; + + case '@namespace': + hasExpression = true; + hasBlock = false; + break; + + case '@keyframes': + case '@counter-style': + hasIdentifier = true; + break; + + case '@document': + case '@supports': + hasUnknown = true; + isRooted = false; + break; + + default: + hasUnknown = true; + break; + } + + parserInput.commentStore.length = 0; + + if (hasIdentifier) { + value = this.entity(); + + if (!value) { + error(`expected ${name} identifier`); + } + } else if (hasExpression) { + value = this.expression(); + + if (!value) { + error(`expected ${name} expression`); + } + } else if (hasUnknown) { + value = this.permissiveValue(/^[{;]/); + hasBlock = parserInput.currentChar() === '{'; + + if (!value) { + if (!hasBlock && parserInput.currentChar() !== ';') { + error(`${name} rule is missing block or ending semi-colon`); + } + } else if (!value.value) { + value = null; + } + } + + if (hasBlock) { + rules = this.blockRuleset(); + } + + if (rules || !hasBlock && value && parserInput.$char(';')) { + parserInput.forget(); + return new tree.AtRule(name, value, rules, index, fileInfo, context.dumpLineNumbers ? getDebugInfo(index) : null, isRooted); + } + + parserInput.restore('at-rule options not recognised'); + }, + // + // A Value is a comma-delimited list of Expressions + // + // font-family: Baskerville, Georgia, serif; + // + // In a Rule, a Value represents everything after the `:`, + // and before the `;`. + // + value: function value() { + let e; + const expressions = []; + const index = parserInput.i; + + do { + e = this.expression(); + + if (e) { + expressions.push(e); + + if (!parserInput.$char(',')) { + break; + } + } + } while (e); + + if (expressions.length > 0) { + return new tree.Value(expressions, index); + } + }, + important: function important() { + if (parserInput.currentChar() === '!') { + return parserInput.$re(/^! *important/); + } + }, + sub: function sub() { + let a; + let e; + parserInput.save(); + + if (parserInput.$char('(')) { + a = this.addition(); + + if (a && parserInput.$char(')')) { + parserInput.forget(); + e = new tree.Expression([a]); + e.parens = true; + return e; + } + + parserInput.restore('Expected \')\''); + return; + } + + parserInput.restore(); + }, + multiplication: function multiplication() { + let m; + let a; + let op; + let operation; + let isSpaced; + m = this.operand(); + + if (m) { + isSpaced = parserInput.isWhitespace(-1); + + while (true) { + if (parserInput.peek(/^\/[*\/]/)) { + break; + } + + parserInput.save(); + op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./'); + + if (!op) { + parserInput.forget(); + break; + } + + a = this.operand(); + + if (!a) { + parserInput.restore(); + break; + } + + parserInput.forget(); + m.parensInOp = true; + a.parensInOp = true; + operation = new tree.Operation(op, [operation || m, a], isSpaced); + isSpaced = parserInput.isWhitespace(-1); + } + + return operation || m; + } + }, + addition: function addition() { + let m; + let a; + let op; + let operation; + let isSpaced; + m = this.multiplication(); + + if (m) { + isSpaced = parserInput.isWhitespace(-1); + + while (true) { + op = parserInput.$re(/^[-+]\s+/) || !isSpaced && (parserInput.$char('+') || parserInput.$char('-')); + + if (!op) { + break; + } + + a = this.multiplication(); + + if (!a) { + break; + } + + m.parensInOp = true; + a.parensInOp = true; + operation = new tree.Operation(op, [operation || m, a], isSpaced); + isSpaced = parserInput.isWhitespace(-1); + } + + return operation || m; + } + }, + conditions: function conditions() { + let a; + let b; + const index = parserInput.i; + let condition; + a = this.condition(true); + + if (a) { + while (true) { + if (!parserInput.peek(/^,\s*(not\s*)?\(/) || !parserInput.$char(',')) { + break; + } + + b = this.condition(true); + + if (!b) { + break; + } + + condition = new tree.Condition('or', condition || a, b, index); + } + + return condition || a; + } + }, + condition: function condition(needsParens) { + let result; + let logical; + let next; + + function or() { + return parserInput.$str('or'); + } + + result = this.conditionAnd(needsParens); + + if (!result) { + return; + } + + logical = or(); + + if (logical) { + next = this.condition(needsParens); + + if (next) { + result = new tree.Condition(logical, result, next); + } else { + return; + } + } + + return result; + }, + conditionAnd: function conditionAnd(needsParens) { + let result; + let logical; + let next; + const self = this; + + function insideCondition() { + const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens); + + if (!cond && !needsParens) { + return self.atomicCondition(needsParens); + } + + return cond; + } + + function and() { + return parserInput.$str('and'); + } + + result = insideCondition(); + + if (!result) { + return; + } + + logical = and(); + + if (logical) { + next = this.conditionAnd(needsParens); + + if (next) { + result = new tree.Condition(logical, result, next); + } else { + return; + } + } + + return result; + }, + negatedCondition: function negatedCondition(needsParens) { + if (parserInput.$str('not')) { + const result = this.parenthesisCondition(needsParens); + + if (result) { + result.negate = !result.negate; + } + + return result; + } + }, + parenthesisCondition: function parenthesisCondition(needsParens) { + function tryConditionFollowedByParenthesis(me) { + let body; + parserInput.save(); + body = me.condition(needsParens); + + if (!body) { + parserInput.restore(); + return; + } + + if (!parserInput.$char(')')) { + parserInput.restore(); + return; + } + + parserInput.forget(); + return body; + } + + let body; + parserInput.save(); + + if (!parserInput.$str('(')) { + parserInput.restore(); + return; + } + + body = tryConditionFollowedByParenthesis(this); + + if (body) { + parserInput.forget(); + return body; + } + + body = this.atomicCondition(needsParens); + + if (!body) { + parserInput.restore(); + return; + } + + if (!parserInput.$char(')')) { + parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`); + return; + } + + parserInput.forget(); + return body; + }, + atomicCondition: function atomicCondition(needsParens) { + const entities = this.entities; + const index = parserInput.i; + let a; + let b; + let c; + let op; + + function cond() { + return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup(); + } + + cond = cond.bind(this); + a = cond(); + + if (a) { + if (parserInput.$char('>')) { + if (parserInput.$char('=')) { + op = '>='; + } else { + op = '>'; + } + } else if (parserInput.$char('<')) { + if (parserInput.$char('=')) { + op = '<='; + } else { + op = '<'; + } + } else if (parserInput.$char('=')) { + if (parserInput.$char('>')) { + op = '=>'; + } else if (parserInput.$char('<')) { + op = '=<'; + } else { + op = '='; + } + } + + if (op) { + b = cond(); + + if (b) { + c = new tree.Condition(op, a, b, index, false); + } else { + error('expected expression'); + } + } else { + c = new tree.Condition('=', a, new tree.Keyword('true'), index, false); + } + + return c; + } + }, + // + // An operand is anything that can be part of an operation, + // such as a Color, or a Variable + // + operand: function operand() { + const entities = this.entities; + let negate; + + if (parserInput.peek(/^-[@\$\(]/)) { + negate = parserInput.$char('-'); + } + + let o = this.sub() || entities.dimension() || entities.color() || entities.variable() || entities.property() || entities.call() || entities.quoted(true) || entities.colorKeyword() || entities.mixinLookup(); + + if (negate) { + o.parensInOp = true; + o = new tree.Negative(o); + } + + return o; + }, + // + // Expressions either represent mathematical operations, + // or white-space delimited Entities. + // + // 1px solid black + // @var * 2 + // + expression: function expression() { + const entities = []; + let e; + let delim; + const index = parserInput.i; + + do { + e = this.comment(); + + if (e) { + entities.push(e); + continue; + } + + e = this.addition() || this.entity(); + + if (e) { + entities.push(e); // operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here + + if (!parserInput.peek(/^\/[\/*]/)) { + delim = parserInput.$char('/'); + + if (delim) { + entities.push(new tree.Anonymous(delim, index)); + } + } + } + } while (e); + + if (entities.length > 0) { + return new tree.Expression(entities); + } + }, + property: function property() { + const name = parserInput.$re(/^(\*?-?[_a-zA-Z0-9-]+)\s*:/); + + if (name) { + return name[1]; + } + }, + ruleProperty: function ruleProperty() { + let name = []; + const index = []; + let s; + let k; + parserInput.save(); + const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\s*:/); + + if (simpleProperty) { + name = [new tree.Keyword(simpleProperty[1])]; + parserInput.forget(); + return name; + } + + function match(re) { + const i = parserInput.i; + const chunk = parserInput.$re(re); + + if (chunk) { + index.push(i); + return name.push(chunk[1]); + } + } + + match(/^(\*?)/); + + while (true) { + if (!match(/^((?:[\w-]+)|(?:[@\$]\{[\w-]+\}))/)) { + break; + } + } + + if (name.length > 1 && match(/^((?:\+_|\+)?)\s*:/)) { + parserInput.forget(); // at last, we have the complete match now. move forward, + // convert name particles to tree objects and return: + + if (name[0] === '') { + name.shift(); + index.shift(); + } + + for (k = 0; k < name.length; k++) { + s = name[k]; + name[k] = s.charAt(0) !== '@' && s.charAt(0) !== '$' ? new tree.Keyword(s) : s.charAt(0) === '@' ? new tree.Variable(`@${s.slice(2, -1)}`, index[k], fileInfo) : new tree.Property(`$${s.slice(2, -1)}`, index[k], fileInfo); + } + + return name; + } + + parserInput.restore(); + } + } + }; +}; + +Parser.serializeVars = vars => { + let s = ''; + + for (const name in vars) { + if (Object.hasOwnProperty.call(vars, name)) { + const value = vars[name]; + s += `${(name[0] === '@' ? '' : '@') + name}: ${value}${String(value).slice(-1) === ';' ? '' : ';'}`; + } + } + + return s; +}; + +function boolean(condition) { + return condition ? Keyword.True : Keyword.False; +} + +function If(condition, trueValue, falseValue) { + return condition ? trueValue : falseValue || new Anonymous(); +} + +var boolean$1 = { + boolean, + 'if': If +}; + +let colorFunctions; + +function clamp$1(val) { + return Math.min(1, Math.max(0, val)); +} + +function hsla(origColor, hsl) { + const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a); + + if (color) { + if (origColor.value && /^(rgb|hsl)/.test(origColor.value)) { + color.value = origColor.value; + } else { + color.value = 'rgb'; + } + + return color; + } +} + +function toHSL(color) { + if (color.toHSL) { + return color.toHSL(); + } else { + throw new Error('Argument cannot be evaluated to a color'); + } +} + +function toHSV(color) { + if (color.toHSV) { + return color.toHSV(); + } else { + throw new Error('Argument cannot be evaluated to a color'); + } +} + +function number(n) { + if (n instanceof Dimension) { + return parseFloat(n.unit.is('%') ? n.value / 100 : n.value); + } else if (typeof n === 'number') { + return n; + } else { + throw { + type: 'Argument', + message: 'color functions take numbers as parameters' + }; + } +} + +function scaled(n, size) { + if (n instanceof Dimension && n.unit.is('%')) { + return parseFloat(n.value * size / 100); + } else { + return number(n); + } +} + +colorFunctions = { + rgb: function rgb(r, g, b) { + const color = colorFunctions.rgba(r, g, b, 1.0); + + if (color) { + color.value = 'rgb'; + return color; + } + }, + rgba: function rgba(r, g, b, a) { + try { + if (r instanceof Color) { + if (g) { + a = number(g); + } else { + a = r.alpha; + } + + return new Color(r.rgb, a, 'rgba'); + } + + const rgb = [r, g, b].map(c => scaled(c, 255)); + a = number(a); + return new Color(rgb, a, 'rgba'); + } catch (e) {} + }, + hsl: function hsl(h, s, l) { + const color = colorFunctions.hsla(h, s, l, 1.0); + + if (color) { + color.value = 'hsl'; + return color; + } + }, + hsla: function hsla(h, s, l, a) { + try { + if (h instanceof Color) { + if (s) { + a = number(s); + } else { + a = h.alpha; + } + + return new Color(h.rgb, a, 'hsla'); + } + + let m1; + let m2; + + function hue(h) { + h = h < 0 ? h + 1 : h > 1 ? h - 1 : h; + + if (h * 6 < 1) { + return m1 + (m2 - m1) * h * 6; + } else if (h * 2 < 1) { + return m2; + } else if (h * 3 < 2) { + return m1 + (m2 - m1) * (2 / 3 - h) * 6; + } else { + return m1; + } + } + + h = number(h) % 360 / 360; + s = clamp$1(number(s)); + l = clamp$1(number(l)); + a = clamp$1(number(a)); + m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s; + m1 = l * 2 - m2; + const rgb = [hue(h + 1 / 3) * 255, hue(h) * 255, hue(h - 1 / 3) * 255]; + a = number(a); + return new Color(rgb, a, 'hsla'); + } catch (e) {} + }, + hsv: function hsv(h, s, v) { + return colorFunctions.hsva(h, s, v, 1.0); + }, + hsva: function hsva(h, s, v, a) { + h = number(h) % 360 / 360 * 360; + s = number(s); + v = number(v); + a = number(a); + let i; + let f; + i = Math.floor(h / 60 % 6); + f = h / 60 - i; + const vs = [v, v * (1 - s), v * (1 - f * s), v * (1 - (1 - f) * s)]; + const perm = [[0, 3, 1], [2, 0, 1], [1, 0, 3], [1, 2, 0], [3, 1, 0], [0, 1, 2]]; + return colorFunctions.rgba(vs[perm[i][0]] * 255, vs[perm[i][1]] * 255, vs[perm[i][2]] * 255, a); + }, + hue: function hue(color) { + return new Dimension(toHSL(color).h); + }, + saturation: function saturation(color) { + return new Dimension(toHSL(color).s * 100, '%'); + }, + lightness: function lightness(color) { + return new Dimension(toHSL(color).l * 100, '%'); + }, + hsvhue: function hsvhue(color) { + return new Dimension(toHSV(color).h); + }, + hsvsaturation: function hsvsaturation(color) { + return new Dimension(toHSV(color).s * 100, '%'); + }, + hsvvalue: function hsvvalue(color) { + return new Dimension(toHSV(color).v * 100, '%'); + }, + red: function red(color) { + return new Dimension(color.rgb[0]); + }, + green: function green(color) { + return new Dimension(color.rgb[1]); + }, + blue: function blue(color) { + return new Dimension(color.rgb[2]); + }, + alpha: function alpha(color) { + return new Dimension(toHSL(color).a); + }, + luma: function luma(color) { + return new Dimension(color.luma() * color.alpha * 100, '%'); + }, + luminance: function luminance(color) { + const luminance = 0.2126 * color.rgb[0] / 255 + 0.7152 * color.rgb[1] / 255 + 0.0722 * color.rgb[2] / 255; + return new Dimension(luminance * color.alpha * 100, '%'); + }, + saturate: function saturate(color, amount, method) { + // filter: saturate(3.2); + // should be kept as is, so check for color + if (!color.rgb) { + return null; + } + + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.s += hsl.s * amount.value / 100; + } else { + hsl.s += amount.value / 100; + } + + hsl.s = clamp$1(hsl.s); + return hsla(color, hsl); + }, + desaturate: function desaturate(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.s -= hsl.s * amount.value / 100; + } else { + hsl.s -= amount.value / 100; + } + + hsl.s = clamp$1(hsl.s); + return hsla(color, hsl); + }, + lighten: function lighten(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.l += hsl.l * amount.value / 100; + } else { + hsl.l += amount.value / 100; + } + + hsl.l = clamp$1(hsl.l); + return hsla(color, hsl); + }, + darken: function darken(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.l -= hsl.l * amount.value / 100; + } else { + hsl.l -= amount.value / 100; + } + + hsl.l = clamp$1(hsl.l); + return hsla(color, hsl); + }, + fadein: function fadein(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.a += hsl.a * amount.value / 100; + } else { + hsl.a += amount.value / 100; + } + + hsl.a = clamp$1(hsl.a); + return hsla(color, hsl); + }, + fadeout: function fadeout(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.a -= hsl.a * amount.value / 100; + } else { + hsl.a -= amount.value / 100; + } + + hsl.a = clamp$1(hsl.a); + return hsla(color, hsl); + }, + fade: function fade(color, amount) { + const hsl = toHSL(color); + hsl.a = amount.value / 100; + hsl.a = clamp$1(hsl.a); + return hsla(color, hsl); + }, + spin: function spin(color, amount) { + const hsl = toHSL(color); + const hue = (hsl.h + amount.value) % 360; + hsl.h = hue < 0 ? 360 + hue : hue; + return hsla(color, hsl); + }, + // + // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein + // http://sass-lang.com + // + mix: function mix(color1, color2, weight) { + if (!weight) { + weight = new Dimension(50); + } + + const p = weight.value / 100.0; + const w = p * 2 - 1; + const a = toHSL(color1).a - toHSL(color2).a; + const w1 = ((w * a == -1 ? w : (w + a) / (1 + w * a)) + 1) / 2.0; + const w2 = 1 - w1; + const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2, color1.rgb[1] * w1 + color2.rgb[1] * w2, color1.rgb[2] * w1 + color2.rgb[2] * w2]; + const alpha = color1.alpha * p + color2.alpha * (1 - p); + return new Color(rgb, alpha); + }, + greyscale: function greyscale(color) { + return colorFunctions.desaturate(color, new Dimension(100)); + }, + contrast: function contrast(color, dark, light, threshold) { + // filter: contrast(3.2); + // should be kept as is, so check for color + if (!color.rgb) { + return null; + } + + if (typeof light === 'undefined') { + light = colorFunctions.rgba(255, 255, 255, 1.0); + } + + if (typeof dark === 'undefined') { + dark = colorFunctions.rgba(0, 0, 0, 1.0); + } // Figure out which is actually light and dark: + + + if (dark.luma() > light.luma()) { + const t = light; + light = dark; + dark = t; + } + + if (typeof threshold === 'undefined') { + threshold = 0.43; + } else { + threshold = number(threshold); + } + + if (color.luma() < threshold) { + return light; + } else { + return dark; + } + }, + // Changes made in 2.7.0 - Reverted in 3.0.0 + // contrast: function (color, color1, color2, threshold) { + // // Return which of `color1` and `color2` has the greatest contrast with `color` + // // according to the standard WCAG contrast ratio calculation. + // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef + // // The threshold param is no longer used, in line with SASS. + // // filter: contrast(3.2); + // // should be kept as is, so check for color + // if (!color.rgb) { + // return null; + // } + // if (typeof color1 === 'undefined') { + // color1 = colorFunctions.rgba(0, 0, 0, 1.0); + // } + // if (typeof color2 === 'undefined') { + // color2 = colorFunctions.rgba(255, 255, 255, 1.0); + // } + // var contrast1, contrast2; + // var luma = color.luma(); + // var luma1 = color1.luma(); + // var luma2 = color2.luma(); + // // Calculate contrast ratios for each color + // if (luma > luma1) { + // contrast1 = (luma + 0.05) / (luma1 + 0.05); + // } else { + // contrast1 = (luma1 + 0.05) / (luma + 0.05); + // } + // if (luma > luma2) { + // contrast2 = (luma + 0.05) / (luma2 + 0.05); + // } else { + // contrast2 = (luma2 + 0.05) / (luma + 0.05); + // } + // if (contrast1 > contrast2) { + // return color1; + // } else { + // return color2; + // } + // }, + argb: function argb(color) { + return new Anonymous(color.toARGB()); + }, + color: function color(c) { + if (c instanceof Quoted && /^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value)) { + const val = c.value.slice(1); + return new Color(val, undefined, `#${val}`); + } + + if (c instanceof Color || (c = Color.fromKeyword(c.value))) { + c.value = undefined; + return c; + } + + throw { + type: 'Argument', + message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF' + }; + }, + tint: function tint(color, amount) { + return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount); + }, + shade: function shade(color, amount) { + return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount); + } +}; +var color = colorFunctions; + +// ref: http://www.w3.org/TR/compositing-1 + +function colorBlend(mode, color1, color2) { + const ab = color1.alpha; // result + + let // backdrop + cb; + const as = color2.alpha; + let // source + cs; + let ar; + let cr; + const r = []; + ar = as + ab * (1 - as); + + for (let i = 0; i < 3; i++) { + cb = color1.rgb[i] / 255; + cs = color2.rgb[i] / 255; + cr = mode(cb, cs); + + if (ar) { + cr = (as * cs + ab * (cb - as * (cb + cs - cr))) / ar; + } + + r[i] = cr * 255; + } + + return new Color(r, ar); +} + +const colorBlendModeFunctions = { + multiply: function multiply(cb, cs) { + return cb * cs; + }, + screen: function screen(cb, cs) { + return cb + cs - cb * cs; + }, + overlay: function overlay(cb, cs) { + cb *= 2; + return cb <= 1 ? colorBlendModeFunctions.multiply(cb, cs) : colorBlendModeFunctions.screen(cb - 1, cs); + }, + softlight: function softlight(cb, cs) { + let d = 1; + let e = cb; + + if (cs > 0.5) { + e = 1; + d = cb > 0.25 ? Math.sqrt(cb) : ((16 * cb - 12) * cb + 4) * cb; + } + + return cb - (1 - 2 * cs) * e * (d - cb); + }, + hardlight: function hardlight(cb, cs) { + return colorBlendModeFunctions.overlay(cs, cb); + }, + difference: function difference(cb, cs) { + return Math.abs(cb - cs); + }, + exclusion: function exclusion(cb, cs) { + return cb + cs - 2 * cb * cs; + }, + // non-w3c functions: + average: function average(cb, cs) { + return (cb + cs) / 2; + }, + negation: function negation(cb, cs) { + return 1 - Math.abs(cb + cs - 1); + } +}; + +for (const f in colorBlendModeFunctions) { + if (colorBlendModeFunctions.hasOwnProperty(f)) { + colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]); + } +} + +var dataUri = (environment => { + const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); + + return { + 'data-uri': function dataUri(mimetypeNode, filePathNode) { + if (!filePathNode) { + filePathNode = mimetypeNode; + mimetypeNode = null; + } + + let mimetype = mimetypeNode && mimetypeNode.value; + let filePath = filePathNode.value; + const currentFileInfo = this.currentFileInfo; + const currentDirectory = currentFileInfo.rewriteUrls ? currentFileInfo.currentDirectory : currentFileInfo.entryPath; + const fragmentStart = filePath.indexOf('#'); + let fragment = ''; + + if (fragmentStart !== -1) { + fragment = filePath.slice(fragmentStart); + filePath = filePath.slice(0, fragmentStart); + } + + const context = clone(this.context); + context.rawBuffer = true; + const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true); + + if (!fileManager) { + return fallback(this, filePathNode); + } + + let useBase64 = false; // detect the mimetype if not given + + if (!mimetypeNode) { + mimetype = environment.mimeLookup(filePath); + + if (mimetype === 'image/svg+xml') { + useBase64 = false; + } else { + // use base 64 unless it's an ASCII or UTF-8 format + const charset = environment.charsetLookup(mimetype); + useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0; + } + + if (useBase64) { + mimetype += ';base64'; + } + } else { + useBase64 = /;base64$/.test(mimetype); + } + + const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment); + + if (!fileSync.contents) { + logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`); + return fallback(this, filePathNode || mimetypeNode); + } + + let buf = fileSync.contents; + + if (useBase64 && !environment.encodeBase64) { + return fallback(this, filePathNode); + } + + buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf); + const uri = `data:${mimetype},${buf}${fragment}`; + return new URL(new Quoted(`"${uri}"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); + } + }; +}); + +const getItemsFromNode = node => { + // handle non-array values as an array of length 1 + // return 'undefined' if index is invalid + const items = Array.isArray(node.value) ? node.value : Array(node); + return items; +}; + +var list = { + _SELF: function _SELF(n) { + return n; + }, + extract: function extract(values, index) { + index = index.value - 1; // (1-based index) + + return getItemsFromNode(values)[index]; + }, + length: function length(values) { + return new Dimension(getItemsFromNode(values).length); + }, + + /** + * Creates a Less list of incremental values. + * Modeled after Lodash's range function, also exists natively in PHP + * + * @param {Dimension} [start=1] + * @param {Dimension} end - e.g. 10 or 10px - unit is added to output + * @param {Dimension} [step=1] + */ + range: function range(start, end, step) { + let from; + let to; + let stepValue = 1; + const list = []; + + if (end) { + to = end; + from = start.value; + + if (step) { + stepValue = step.value; + } + } else { + from = 1; + to = start; + } + + for (let i = from; i <= to.value; i += stepValue) { + list.push(new Dimension(i, to.unit)); + } + + return new Expression(list); + }, + each: function each(list, rs) { + const rules = []; + let newRules; + let iterator; + + if (list.value && !(list instanceof Quoted)) { + if (Array.isArray(list.value)) { + iterator = list.value; + } else { + iterator = [list.value]; + } + } else if (list.ruleset) { + iterator = list.ruleset.rules; + } else if (list.rules) { + iterator = list.rules; + } else if (Array.isArray(list)) { + iterator = list; + } else { + iterator = [list]; + } + + let valueName = '@value'; + let keyName = '@key'; + let indexName = '@index'; + + if (rs.params) { + valueName = rs.params[0] && rs.params[0].name; + keyName = rs.params[1] && rs.params[1].name; + indexName = rs.params[2] && rs.params[2].name; + rs = rs.rules; + } else { + rs = rs.ruleset; + } + + for (let i = 0; i < iterator.length; i++) { + let key; + let value; + const item = iterator[i]; + + if (item instanceof Declaration) { + key = typeof item.name === 'string' ? item.name : item.name[0].value; + value = item.value; + } else { + key = new Dimension(i + 1); + value = item; + } + + if (item instanceof Comment) { + continue; + } + + newRules = rs.rules.slice(0); + + if (valueName) { + newRules.push(new Declaration(valueName, value, false, false, this.index, this.currentFileInfo)); + } + + if (indexName) { + newRules.push(new Declaration(indexName, new Dimension(i + 1), false, false, this.index, this.currentFileInfo)); + } + + if (keyName) { + newRules.push(new Declaration(keyName, key, false, false, this.index, this.currentFileInfo)); + } + + rules.push(new Ruleset([new Selector([new Element("", '&')])], newRules, rs.strictImports, rs.visibilityInfo())); + } + + return new Ruleset([new Selector([new Element("", '&')])], rules, rs.strictImports, rs.visibilityInfo()).eval(this.context); + } +}; + +const MathHelper = (fn, unit, n) => { + if (!(n instanceof Dimension)) { + throw { + type: 'Argument', + message: 'argument must be a number' + }; + } + + if (unit == null) { + unit = n.unit; + } else { + n = n.unify(); + } + + return new Dimension(fn(parseFloat(n.value)), unit); +}; + +const mathFunctions = { + // name, unit + ceil: null, + floor: null, + sqrt: null, + abs: null, + tan: '', + sin: '', + cos: '', + atan: 'rad', + asin: 'rad', + acos: 'rad' +}; + +for (const f in mathFunctions) { + if (mathFunctions.hasOwnProperty(f)) { + mathFunctions[f] = MathHelper.bind(null, Math[f], mathFunctions[f]); + } +} + +mathFunctions.round = (n, f) => { + const fraction = typeof f === 'undefined' ? 0 : f.value; + return MathHelper(num => num.toFixed(fraction), null, n); +}; + +const minMax = function minMax(isMin, args) { + args = Array.prototype.slice.call(args); + + switch (args.length) { + case 0: + throw { + type: 'Argument', + message: 'one or more arguments required' + }; + } + + let i; // key is the unit.toString() for unified Dimension values, + + let j; + let current; + let currentUnified; + let referenceUnified; + let unit; + let unitStatic; + let unitClone; + const // elems only contains original argument values. + order = []; + const values = {}; // value is the index into the order array. + + for (i = 0; i < args.length; i++) { + current = args[i]; + + if (!(current instanceof Dimension)) { + if (Array.isArray(args[i].value)) { + Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value)); + } + + continue; + } + + currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify(); + unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString(); + unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic; + unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone; + j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit]; + + if (j === undefined) { + if (unitStatic !== undefined && unit !== unitStatic) { + throw { + type: 'Argument', + message: 'incompatible types' + }; + } + + values[unit] = order.length; + order.push(current); + continue; + } + + referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify(); + + if (isMin && currentUnified.value < referenceUnified.value || !isMin && currentUnified.value > referenceUnified.value) { + order[j] = current; + } + } + + if (order.length == 1) { + return order[0]; + } + + args = order.map(function (a) { + return a.toCSS(this.context); + }).join(this.context.compress ? ',' : ', '); + return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`); +}; + +var number$1 = { + min: function min(...args) { + return minMax(true, args); + }, + max: function max(...args) { + return minMax(false, args); + }, + convert: function convert(val, unit) { + return val.convertTo(unit.value); + }, + pi: function pi() { + return new Dimension(Math.PI); + }, + mod: function mod(a, b) { + return new Dimension(a.value % b.value, a.unit); + }, + pow: function pow(x, y) { + if (typeof x === 'number' && typeof y === 'number') { + x = new Dimension(x); + y = new Dimension(y); + } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) { + throw { + type: 'Argument', + message: 'arguments must be numbers' + }; + } + + return new Dimension(Math.pow(x.value, y.value), x.unit); + }, + percentage: function percentage(n) { + const result = MathHelper(num => num * 100, '%', n); + return result; + } +}; + +var string = { + e: function e(str) { + return new Quoted('"', str instanceof JavaScript ? str.evaluated : str.value, true); + }, + escape: function escape(str) { + return new Anonymous(encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B').replace(/\(/g, '%28').replace(/\)/g, '%29')); + }, + replace: function replace(string, pattern, replacement, flags) { + let result = string.value; + replacement = replacement.type === 'Quoted' ? replacement.value : replacement.toCSS(); + result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement); + return new Quoted(string.quote || '', result, string.escaped); + }, + '%': function _(string + /* arg, arg, ... */ + ) { + const args = Array.prototype.slice.call(arguments, 1); + let result = string.value; + + for (let i = 0; i < args.length; i++) { + /* jshint loopfunc:true */ + result = result.replace(/%[sda]/i, token => { + const value = args[i].type === 'Quoted' && token.match(/s/i) ? args[i].value : args[i].toCSS(); + return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value; + }); + } + + result = result.replace(/%%/g, '%'); + return new Quoted(string.quote || '', result, string.escaped); + } +}; + +var svg = (environment => { + return { + 'svg-gradient': function svgGradient(direction) { + let stops; + let gradientDirectionSvg; + let gradientType = 'linear'; + let rectangleDimension = 'x="0" y="0" width="1" height="1"'; + const renderEnv = { + compress: false + }; + let returner; + const directionValue = direction.toCSS(renderEnv); + let i; + let color; + let position; + let positionValue; + let alpha; + + function throwArgumentDescriptor() { + throw { + type: 'Argument', + message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' + ' end_color [end_position] or direction, color list' + }; + } + + if (arguments.length == 2) { + if (arguments[1].value.length < 2) { + throwArgumentDescriptor(); + } + + stops = arguments[1].value; + } else if (arguments.length < 3) { + throwArgumentDescriptor(); + } else { + stops = Array.prototype.slice.call(arguments, 1); + } + + switch (directionValue) { + case 'to bottom': + gradientDirectionSvg = 'x1="0%" y1="0%" x2="0%" y2="100%"'; + break; + + case 'to right': + gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="0%"'; + break; + + case 'to bottom right': + gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="100%"'; + break; + + case 'to top right': + gradientDirectionSvg = 'x1="0%" y1="100%" x2="100%" y2="0%"'; + break; + + case 'ellipse': + case 'ellipse at center': + gradientType = 'radial'; + gradientDirectionSvg = 'cx="50%" cy="50%" r="75%"'; + rectangleDimension = 'x="-50" y="-50" width="101" height="101"'; + break; + + default: + throw { + type: 'Argument', + message: 'svg-gradient direction must be \'to bottom\', \'to right\',' + ' \'to bottom right\', \'to top right\' or \'ellipse at center\'' + }; + } + + returner = `<${gradientType}Gradient id="g" ${gradientDirectionSvg}>`; + + for (i = 0; i < stops.length; i += 1) { + if (stops[i] instanceof Expression) { + color = stops[i].value[0]; + position = stops[i].value[1]; + } else { + color = stops[i]; + position = undefined; + } + + if (!(color instanceof Color) || !((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension)) { + throwArgumentDescriptor(); + } + + positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%'; + alpha = color.alpha; + returner += ``; + } + + returner += ``; + returner = encodeURIComponent(returner); + returner = `data:image/svg+xml,${returner}`; + return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); + } + }; +}); + +const isa = (n, Type) => n instanceof Type ? Keyword.True : Keyword.False; + +const isunit = (n, unit) => { + if (unit === undefined) { + throw { + type: 'Argument', + message: 'missing the required second argument to isunit.' + }; + } + + unit = typeof unit.value === 'string' ? unit.value : unit; + + if (typeof unit !== 'string') { + throw { + type: 'Argument', + message: 'Second argument to isunit should be a unit or a string.' + }; + } + + return n instanceof Dimension && n.unit.is(unit) ? Keyword.True : Keyword.False; +}; + +var types = { + isruleset: function isruleset(n) { + return isa(n, DetachedRuleset); + }, + iscolor: function iscolor(n) { + return isa(n, Color); + }, + isnumber: function isnumber(n) { + return isa(n, Dimension); + }, + isstring: function isstring(n) { + return isa(n, Quoted); + }, + iskeyword: function iskeyword(n) { + return isa(n, Keyword); + }, + isurl: function isurl(n) { + return isa(n, URL); + }, + ispixel: function ispixel(n) { + return isunit(n, 'px'); + }, + ispercentage: function ispercentage(n) { + return isunit(n, '%'); + }, + isem: function isem(n) { + return isunit(n, 'em'); + }, + isunit, + unit: function unit(val, _unit) { + if (!(val instanceof Dimension)) { + throw { + type: 'Argument', + message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` + }; + } + + if (_unit) { + if (_unit instanceof Keyword) { + _unit = _unit.value; + } else { + _unit = _unit.toCSS(); + } + } else { + _unit = ''; + } + + return new Dimension(val.value, _unit); + }, + 'get-unit': function getUnit(n) { + return new Anonymous(n.unit); + } +}; + +var Functions = (environment => { + const functions = { + functionRegistry, + functionCaller + }; // register functions + + functionRegistry.addMultiple(boolean$1); + functionRegistry.addMultiple(defaultFunc$1); + functionRegistry.addMultiple(color); + functionRegistry.addMultiple(colorBlend); + functionRegistry.addMultiple(dataUri(environment)); + functionRegistry.addMultiple(list); + functionRegistry.addMultiple(mathFunctions); + functionRegistry.addMultiple(number$1); + functionRegistry.addMultiple(string); + functionRegistry.addMultiple(svg()); + functionRegistry.addMultiple(types); + return functions; +}); + +var sourceMapOutput = (environment => { + class SourceMapOutput { + constructor(options) { + this._css = []; + this._rootNode = options.rootNode; + this._contentsMap = options.contentsMap; + this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap; + + if (options.sourceMapFilename) { + this._sourceMapFilename = options.sourceMapFilename.replace(/\\/g, '/'); + } + + this._outputFilename = options.outputFilename; + this.sourceMapURL = options.sourceMapURL; + + if (options.sourceMapBasepath) { + this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\/g, '/'); + } + + if (options.sourceMapRootpath) { + this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\/g, '/'); + + if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') { + this._sourceMapRootpath += '/'; + } + } else { + this._sourceMapRootpath = ''; + } + + this._outputSourceFiles = options.outputSourceFiles; + this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator(); + this._lineNumber = 0; + this._column = 0; + } + + removeBasepath(path) { + if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) { + path = path.substring(this._sourceMapBasepath.length); + + if (path.charAt(0) === '\\' || path.charAt(0) === '/') { + path = path.substring(1); + } + } + + return path; + } + + normalizeFilename(filename) { + filename = filename.replace(/\\/g, '/'); + filename = this.removeBasepath(filename); + return (this._sourceMapRootpath || '') + filename; + } + + add(chunk, fileInfo, index, mapLines) { + // ignore adding empty strings + if (!chunk) { + return; + } + + let lines; + let sourceLines; + let columns; + let sourceColumns; + let i; + + if (fileInfo && fileInfo.filename) { + let inputSource = this._contentsMap[fileInfo.filename]; // remove vars/banner added to the top of the file + + if (this._contentsIgnoredCharsMap[fileInfo.filename]) { + // adjust the index + index -= this._contentsIgnoredCharsMap[fileInfo.filename]; + + if (index < 0) { + index = 0; + } // adjust the source + + + inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]); + } // ignore empty content + + + if (inputSource === undefined) { + return; + } + + inputSource = inputSource.substring(0, index); + sourceLines = inputSource.split('\n'); + sourceColumns = sourceLines[sourceLines.length - 1]; + } + + lines = chunk.split('\n'); + columns = lines[lines.length - 1]; + + if (fileInfo && fileInfo.filename) { + if (!mapLines) { + this._sourceMapGenerator.addMapping({ + generated: { + line: this._lineNumber + 1, + column: this._column + }, + original: { + line: sourceLines.length, + column: sourceColumns.length + }, + source: this.normalizeFilename(fileInfo.filename) + }); + } else { + for (i = 0; i < lines.length; i++) { + this._sourceMapGenerator.addMapping({ + generated: { + line: this._lineNumber + i + 1, + column: i === 0 ? this._column : 0 + }, + original: { + line: sourceLines.length + i, + column: i === 0 ? sourceColumns.length : 0 + }, + source: this.normalizeFilename(fileInfo.filename) + }); + } + } + } + + if (lines.length === 1) { + this._column += columns.length; + } else { + this._lineNumber += lines.length - 1; + this._column = columns.length; + } + + this._css.push(chunk); + } + + isEmpty() { + return this._css.length === 0; + } + + toCSS(context) { + this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ + file: this._outputFilename, + sourceRoot: null + }); + + if (this._outputSourceFiles) { + for (const filename in this._contentsMap) { + if (this._contentsMap.hasOwnProperty(filename)) { + let source = this._contentsMap[filename]; + + if (this._contentsIgnoredCharsMap[filename]) { + source = source.slice(this._contentsIgnoredCharsMap[filename]); + } + + this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source); + } + } + } + + this._rootNode.genCSS(context, this); + + if (this._css.length > 0) { + let sourceMapURL; + const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON()); + + if (this.sourceMapURL) { + sourceMapURL = this.sourceMapURL; + } else if (this._sourceMapFilename) { + sourceMapURL = this._sourceMapFilename; + } + + this.sourceMapURL = sourceMapURL; + this.sourceMap = sourceMapContent; + } + + return this._css.join(''); + } + + } + + return SourceMapOutput; +}); + +var sourceMapBuilder = ((SourceMapOutput, environment) => { + class SourceMapBuilder { + constructor(options) { + this.options = options; + } + + toCSS(rootNode, options, imports) { + const sourceMapOutput = new SourceMapOutput({ + contentsIgnoredCharsMap: imports.contentsIgnoredChars, + rootNode, + contentsMap: imports.contents, + sourceMapFilename: this.options.sourceMapFilename, + sourceMapURL: this.options.sourceMapURL, + outputFilename: this.options.sourceMapOutputFilename, + sourceMapBasepath: this.options.sourceMapBasepath, + sourceMapRootpath: this.options.sourceMapRootpath, + outputSourceFiles: this.options.outputSourceFiles, + sourceMapGenerator: this.options.sourceMapGenerator, + sourceMapFileInline: this.options.sourceMapFileInline + }); + const css = sourceMapOutput.toCSS(options); + this.sourceMap = sourceMapOutput.sourceMap; + this.sourceMapURL = sourceMapOutput.sourceMapURL; + + if (this.options.sourceMapInputFilename) { + this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename); + } + + if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) { + this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL); + } + + return css + this.getCSSAppendage(); + } + + getCSSAppendage() { + let sourceMapURL = this.sourceMapURL; + + if (this.options.sourceMapFileInline) { + if (this.sourceMap === undefined) { + return ''; + } + + sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`; + } + + if (sourceMapURL) { + return `/*# sourceMappingURL=${sourceMapURL} */`; + } + + return ''; + } + + getExternalSourceMap() { + return this.sourceMap; + } + + setExternalSourceMap(sourceMap) { + this.sourceMap = sourceMap; + } + + isInline() { + return this.options.sourceMapFileInline; + } + + getSourceMapURL() { + return this.sourceMapURL; + } + + getOutputFilename() { + return this.options.sourceMapOutputFilename; + } + + getInputFilename() { + return this.sourceMapInputFilename; + } + + } + + return SourceMapBuilder; +}); + +var transformTree = ((root, options = {}) => { + let evaldRoot; + let variables = options.variables; + const evalEnv = new contexts.Eval(options); // + // Allows setting variables with a hash, so: + // + // `{ color: new tree.Color('#f01') }` will become: + // + // new tree.Declaration('@color', + // new tree.Value([ + // new tree.Expression([ + // new tree.Color('#f01') + // ]) + // ]) + // ) + // + + if (typeof variables === 'object' && !Array.isArray(variables)) { + variables = Object.keys(variables).map(k => { + let value = variables[k]; + + if (!(value instanceof tree.Value)) { + if (!(value instanceof tree.Expression)) { + value = new tree.Expression([value]); + } + + value = new tree.Value([value]); + } + + return new tree.Declaration(`@${k}`, value, false, null, 0); + }); + evalEnv.frames = [new tree.Ruleset(null, variables)]; + } + + const visitors$1 = [new visitors.JoinSelectorVisitor(), new visitors.MarkVisibleSelectorsVisitor(true), new visitors.ExtendVisitor(), new visitors.ToCSSVisitor({ + compress: Boolean(options.compress) + })]; + const preEvalVisitors = []; + let v; + let visitorIterator; + /** + * first() / get() allows visitors to be added while visiting + * + * @todo Add scoping for visitors just like functions for @plugin; right now they're global + */ + + if (options.pluginManager) { + visitorIterator = options.pluginManager.visitor(); + + for (var i = 0; i < 2; i++) { + visitorIterator.first(); + + while (v = visitorIterator.get()) { + if (v.isPreEvalVisitor) { + if (i === 0 || preEvalVisitors.indexOf(v) === -1) { + preEvalVisitors.push(v); + v.run(root); + } + } else { + if (i === 0 || visitors$1.indexOf(v) === -1) { + if (v.isPreVisitor) { + visitors$1.unshift(v); + } else { + visitors$1.push(v); + } + } + } + } + } + } + + evaldRoot = root.eval(evalEnv); + + for (var i = 0; i < visitors$1.length; i++) { + visitors$1[i].run(evaldRoot); + } // Run any remaining visitors added after eval pass + + + if (options.pluginManager) { + visitorIterator.first(); + + while (v = visitorIterator.get()) { + if (visitors$1.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) { + v.run(evaldRoot); + } + } + } + + return evaldRoot; +}); + +var parseTree = (SourceMapBuilder => { + class ParseTree { + constructor(root, imports) { + this.root = root; + this.imports = imports; + } + + toCSS(options) { + let evaldRoot; + const result = {}; + let sourceMapBuilder; + + try { + evaldRoot = transformTree(this.root, options); + } catch (e) { + throw new LessError(e, this.imports); + } + + try { + const compress = Boolean(options.compress); + + if (compress) { + logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); + } + + const toCSSOptions = { + compress, + dumpLineNumbers: options.dumpLineNumbers, + strictUnits: Boolean(options.strictUnits), + numPrecision: 8 + }; + + if (options.sourceMap) { + sourceMapBuilder = new SourceMapBuilder(options.sourceMap); + result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports); + } else { + result.css = evaldRoot.toCSS(toCSSOptions); + } + } catch (e) { + throw new LessError(e, this.imports); + } + + if (options.pluginManager) { + const postProcessors = options.pluginManager.getPostProcessors(); + + for (let i = 0; i < postProcessors.length; i++) { + result.css = postProcessors[i].process(result.css, { + sourceMap: sourceMapBuilder, + options, + imports: this.imports + }); + } + } + + if (options.sourceMap) { + result.map = sourceMapBuilder.getExternalSourceMap(); + } + + result.imports = []; + + for (const file in this.imports.files) { + if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) { + result.imports.push(file); + } + } + + return result; + } + + } + + return ParseTree; +}); + +var importManager = (environment => { + // FileInfo = { + // 'rewriteUrls' - option - whether to adjust URL's to be relative + // 'filename' - full resolved filename of current file + // 'rootpath' - path to append to normal URLs for this node + // 'currentDirectory' - path to the current file, absolute + // 'rootFilename' - filename of the base file + // 'entryPath' - absolute path to the entry file + // 'reference' - whether the file should not be output and only output parts that are referenced + class ImportManager { + constructor(less, context, rootFileInfo) { + this.less = less; + this.rootFilename = rootFileInfo.filename; + this.paths = context.paths || []; // Search paths, when importing + + this.contents = {}; // map - filename to contents of all the files + + this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore + + this.mime = context.mime; + this.error = null; + this.context = context; // Deprecated? Unused outside of here, could be useful. + + this.queue = []; // Files which haven't been imported yet + + this.files = {}; // Holds the imported parse trees. + } + /** + * Add an import to be imported + * @param path - the raw path + * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension) + * @param currentFileInfo - the current file info (used for instance to work out relative paths) + * @param importOptions - import options + * @param callback - callback for when it is imported + */ + + + push(path, tryAppendExtension, currentFileInfo, importOptions, callback) { + const importManager = this; + const pluginLoader = this.context.pluginManager.Loader; + this.queue.push(path); + + const fileParsedFunc = (e, root, fullPath) => { + importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue + + const importedEqualsRoot = fullPath === importManager.rootFilename; + + if (importOptions.optional && e) { + callback(null, { + rules: [] + }, false, null); + logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`); + } else { + // Inline imports aren't cached here. + // If we start to cache them, please make sure they won't conflict with non-inline imports of the + // same name as they used to do before this comment and the condition below have been added. + if (!importManager.files[fullPath] && !importOptions.inline) { + importManager.files[fullPath] = { + root, + options: importOptions + }; + } + + if (e && !importManager.error) { + importManager.error = e; + } + + callback(e, root, importedEqualsRoot, fullPath); + } + }; + + const newFileInfo = { + rewriteUrls: this.context.rewriteUrls, + entryPath: currentFileInfo.entryPath, + rootpath: currentFileInfo.rootpath, + rootFilename: currentFileInfo.rootFilename + }; + const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment); + + if (!fileManager) { + fileParsedFunc({ + message: `Could not find a file-manager for ${path}` + }); + return; + } + + const loadFileCallback = loadedFile => { + let plugin; + const resolvedFilename = loadedFile.filename; + const contents = loadedFile.contents.replace(/^\uFEFF/, ''); // Pass on an updated rootpath if path of imported file is relative and file + // is in a (sub|sup) directory + // + // Examples: + // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/', + // then rootpath should become 'less/module/nav/' + // - If path of imported file is '../mixins.less' and rootpath is 'less/', + // then rootpath should become 'less/../' + + newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename); + + if (newFileInfo.rewriteUrls) { + newFileInfo.rootpath = fileManager.join(importManager.context.rootpath || '', fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath)); + + if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) { + newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath); + } + } + + newFileInfo.filename = resolvedFilename; + const newEnv = new contexts.Parse(importManager.context); + newEnv.processImports = false; + importManager.contents[resolvedFilename] = contents; + + if (currentFileInfo.reference || importOptions.reference) { + newFileInfo.reference = true; + } + + if (importOptions.isPlugin) { + plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo); + + if (plugin instanceof LessError) { + fileParsedFunc(plugin, null, resolvedFilename); + } else { + fileParsedFunc(null, plugin, resolvedFilename); + } + } else if (importOptions.inline) { + fileParsedFunc(null, contents, resolvedFilename); + } else { + // import (multiple) parse trees apparently get altered and can't be cached. + // TODO: investigate why this is + if (importManager.files[resolvedFilename] && !importManager.files[resolvedFilename].options.multiple && !importOptions.multiple) { + fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename); + } else { + new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => { + fileParsedFunc(e, root, resolvedFilename); + }); + } + } + }; + + let promise; + const context = clone(this.context); + + if (tryAppendExtension) { + context.ext = importOptions.isPlugin ? '.js' : '.less'; + } + + if (importOptions.isPlugin) { + context.mime = 'application/javascript'; + promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager); + } else { + promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment, (err, loadedFile) => { + if (err) { + fileParsedFunc(err); + } else { + loadFileCallback(loadedFile); + } + }); + } + + if (promise) { + promise.then(loadFileCallback, fileParsedFunc); + } + } + + } + + return ImportManager; +}); + +var Render = ((environment, ParseTree, ImportManager) => { + const render = function render(input, options, callback) { + if (typeof options === 'function') { + callback = options; + options = copyOptions(this.options, {}); + } else { + options = copyOptions(this.options, options || {}); + } + + if (!callback) { + const self = this; + return new Promise((resolve, reject) => { + render.call(self, input, options, (err, output) => { + if (err) { + reject(err); + } else { + resolve(output); + } + }); + }); + } else { + this.parse(input, options, (err, root, imports, options) => { + if (err) { + return callback(err); + } + + let result; + + try { + const parseTree = new ParseTree(root, imports); + result = parseTree.toCSS(options); + } catch (err) { + return callback(err); + } + + callback(null, result); + }); + } + }; + + return render; +}); + +/** + * Plugin Manager + */ +class PluginManager { + constructor(less) { + this.less = less; + this.visitors = []; + this.preProcessors = []; + this.postProcessors = []; + this.installedPlugins = []; + this.fileManagers = []; + this.iterator = -1; + this.pluginCache = {}; + this.Loader = new less.PluginLoader(less); + } + /** + * Adds all the plugins in the array + * @param {Array} plugins + */ + + + addPlugins(plugins) { + if (plugins) { + for (let i = 0; i < plugins.length; i++) { + this.addPlugin(plugins[i]); + } + } + } + /** + * + * @param plugin + * @param {String} filename + */ + + + addPlugin(plugin, filename, functionRegistry) { + this.installedPlugins.push(plugin); + + if (filename) { + this.pluginCache[filename] = plugin; + } + + if (plugin.install) { + plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry); + } + } + /** + * + * @param filename + */ + + + get(filename) { + return this.pluginCache[filename]; + } + /** + * Adds a visitor. The visitor object has options on itself to determine + * when it should run. + * @param visitor + */ + + + addVisitor(visitor) { + this.visitors.push(visitor); + } + /** + * Adds a pre processor object + * @param {object} preProcessor + * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import + */ + + + addPreProcessor(preProcessor, priority) { + let indexToInsertAt; + + for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) { + if (this.preProcessors[indexToInsertAt].priority >= priority) { + break; + } + } + + this.preProcessors.splice(indexToInsertAt, 0, { + preProcessor, + priority + }); + } + /** + * Adds a post processor object + * @param {object} postProcessor + * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression + */ + + + addPostProcessor(postProcessor, priority) { + let indexToInsertAt; + + for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) { + if (this.postProcessors[indexToInsertAt].priority >= priority) { + break; + } + } + + this.postProcessors.splice(indexToInsertAt, 0, { + postProcessor, + priority + }); + } + /** + * + * @param manager + */ + + + addFileManager(manager) { + this.fileManagers.push(manager); + } + /** + * + * @returns {Array} + * @private + */ + + + getPreProcessors() { + const preProcessors = []; + + for (let i = 0; i < this.preProcessors.length; i++) { + preProcessors.push(this.preProcessors[i].preProcessor); + } + + return preProcessors; + } + /** + * + * @returns {Array} + * @private + */ + + + getPostProcessors() { + const postProcessors = []; + + for (let i = 0; i < this.postProcessors.length; i++) { + postProcessors.push(this.postProcessors[i].postProcessor); + } + + return postProcessors; + } + /** + * + * @returns {Array} + * @private + */ + + + getVisitors() { + return this.visitors; + } + + visitor() { + const self = this; + return { + first: function first() { + self.iterator = -1; + return self.visitors[self.iterator]; + }, + get: function get() { + self.iterator += 1; + return self.visitors[self.iterator]; + } + }; + } + /** + * + * @returns {Array} + * @private + */ + + + getFileManagers() { + return this.fileManagers; + } + +} + +let pm; + +const PluginManagerFactory = (less, newFactory) => { + if (newFactory || !pm) { + pm = new PluginManager(less); + } + + return pm; +}; // + +var Parse = ((environment, ParseTree, ImportManager) => { + const parse = function parse(input, options, callback) { + if (typeof options === 'function') { + callback = options; + options = copyOptions(this.options, {}); + } else { + options = copyOptions(this.options, options || {}); + } + + if (!callback) { + const self = this; + return new Promise((resolve, reject) => { + parse.call(self, input, options, (err, output) => { + if (err) { + reject(err); + } else { + resolve(output); + } + }); + }); + } else { + let context; + let rootFileInfo; + const pluginManager = new PluginManagerFactory(this, !options.reUsePluginManager); + options.pluginManager = pluginManager; + context = new contexts.Parse(options); + + if (options.rootFileInfo) { + rootFileInfo = options.rootFileInfo; + } else { + const filename = options.filename || 'input'; + const entryPath = filename.replace(/[^\/\\]*$/, ''); + rootFileInfo = { + filename, + rewriteUrls: context.rewriteUrls, + rootpath: context.rootpath || '', + currentDirectory: entryPath, + entryPath, + rootFilename: filename + }; // add in a missing trailing slash + + if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') { + rootFileInfo.rootpath += '/'; + } + } + + const imports = new ImportManager(this, context, rootFileInfo); + this.importManager = imports; // TODO: allow the plugins to be just a list of paths or names + // Do an async plugin queue like lessc + + if (options.plugins) { + options.plugins.forEach(plugin => { + let evalResult; + let contents; + + if (plugin.fileContent) { + contents = plugin.fileContent.replace(/^\uFEFF/, ''); + evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename); + + if (evalResult instanceof LessError) { + return callback(evalResult); + } + } else { + pluginManager.addPlugin(plugin); + } + }); + } + + new Parser(context, imports, rootFileInfo).parse(input, (e, root) => { + if (e) { + return callback(e); + } + + callback(null, root, imports, options); + }, options); + } + }; + + return parse; +}); + +var createFromEnvironment = ((environment, fileManagers) => { + const SourceMapOutput = sourceMapOutput(environment); + const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment); + const ParseTree = parseTree(SourceMapBuilder); + const ImportManager = importManager(environment); + const render = Render(environment, ParseTree); + const parse = Parse(environment, ParseTree, ImportManager); + const environ = new environment$1(environment, fileManagers); + const functions = Functions(environment); + const initial = { + version: [3, 9, 0], + data, + tree, + Environment: environment$1, + AbstractFileManager: abstractFileManager, + AbstractPluginLoader, + environment: environ, + visitors, + Parser, + functions, + contexts, + SourceMapOutput, + SourceMapBuilder, + ParseTree, + ImportManager, + render, + parse, + LessError, + transformTree, + utils: utils$1, + PluginManager: PluginManagerFactory, + logger + }; // Create a public API + + const ctor = t => function (...args) { + const obj = Object.create(t.prototype); + t.apply(obj, Array.prototype.slice.call(args, 0)); + return obj; + }; + + let t; + const api = Object.create(initial); + + for (const n in initial.tree) { + /* eslint guard-for-in: 0 */ + t = initial.tree[n]; + + if (typeof t === 'function') { + api[n.toLowerCase()] = ctor(t); + } else { + api[n] = Object.create(null); + + for (const o in t) { + /* eslint guard-for-in: 0 */ + api[n][o.toLowerCase()] = ctor(t[o]); + } + } + } + + return api; +}); + +function createCommonjsModule(fn, module) { + return module = { exports: {} }, fn(module, module.exports), module.exports; +} + +var lesscHelper = createCommonjsModule(function (module, exports) { + // lessc_helper.js + // + // helper functions for lessc + const lessc_helper = { + // Stylize a string + stylize: function stylize(str, style) { + const styles = { + 'reset': [0, 0], + 'bold': [1, 22], + 'inverse': [7, 27], + 'underline': [4, 24], + 'yellow': [33, 39], + 'green': [32, 39], + 'red': [31, 39], + 'grey': [90, 39] + }; + return `\x1b[${styles[style][0]}m${str}\x1b[${styles[style][1]}m`; + }, + // Print command line options + printUsage: function printUsage() { + console.log('usage: lessc [option option=parameter ...] [destination]'); + console.log(''); + console.log('If source is set to `-\' (dash or hyphen-minus), input is read from stdin.'); + console.log(''); + console.log('options:'); + console.log(' -h, --help Prints help (this message) and exit.'); + console.log(' --include-path=PATHS Sets include paths. Separated by `:\'. `;\' also supported on windows.'); + console.log(' -M, --depends Outputs a makefile import dependency list to stdout.'); + console.log(' --no-color Disables colorized output.'); + console.log(' --ie-compat Enables IE8 compatibility checks.'); + console.log(' --js Enables inline JavaScript in less files'); + console.log(' -l, --lint Syntax check only (lint).'); + console.log(' -s, --silent Suppresses output of error messages.'); + console.log(' --strict-imports Forces evaluation of imports.'); + console.log(' --insecure Allows imports from insecure https hosts.'); + console.log(' -v, --version Prints version number and exit.'); + console.log(' --verbose Be verbose.'); + console.log(' --source-map[=FILENAME] Outputs a v3 sourcemap to the filename (or output filename.map).'); + console.log(' --source-map-rootpath=X Adds this path onto the sourcemap filename and less file paths.'); + console.log(' --source-map-basepath=X Sets sourcemap base path, defaults to current working directory.'); + console.log(' --source-map-include-source Puts the less files into the map instead of referencing them.'); + console.log(' --source-map-inline Puts the map (and any less files) as a base64 data uri into the output css file.'); + console.log(' --source-map-url=URL Sets a custom URL to map file, for sourceMappingURL comment'); + console.log(' in generated CSS file.'); + console.log(' -rp, --rootpath=URL Sets rootpath for url rewriting in relative imports and urls'); + console.log(' Works with or without the relative-urls option.'); + console.log(' -ru=, --rewrite-urls= Rewrites URLs to make them relative to the base less file.'); + console.log(' all|local|off \'all\' rewrites all URLs, \'local\' just those starting with a \'.\''); + console.log(''); + console.log(' -m=, --math='); + console.log(' always Less will eagerly perform math operations always.'); + console.log(' parens-division Math performed except for division (/) operator'); + console.log(' parens | strict Math only performed inside parentheses'); + console.log(' strict-legacy Parens required in very strict terms (legacy --strict-math)'); + console.log(''); + console.log(' -su=on|off Allows mixed units, e.g. 1px+1em or 1px*1px which have units'); + console.log(' --strict-units=on|off that cannot be represented.'); + console.log(' --global-var=\'VAR=VALUE\' Defines a variable that can be referenced by the file.'); + console.log(' --modify-var=\'VAR=VALUE\' Modifies a variable already declared in the file.'); + console.log(' --url-args=\'QUERYSTRING\' Adds params into url tokens (e.g. 42, cb=42 or \'a=1&b=2\')'); + console.log(' --plugin=PLUGIN=OPTIONS Loads a plugin. You can also omit the --plugin= if the plugin begins'); + console.log(' less-plugin. E.g. the clean css plugin is called less-plugin-clean-css'); + console.log(' once installed (npm install less-plugin-clean-css), use either with'); + console.log(' --plugin=less-plugin-clean-css or just --clean-css'); + console.log(' specify options afterwards e.g. --plugin=less-plugin-clean-css="advanced"'); + console.log(' or --clean-css="advanced"'); + console.log(''); + console.log('-------------------------- Deprecated ----------------'); + console.log(' -sm=on|off Legacy parens-only math. Use --math'); + console.log(' --strict-math=on|off '); + console.log(''); + console.log(' --line-numbers=TYPE Outputs filename and line numbers.'); + console.log(' TYPE can be either \'comments\', which will output'); + console.log(' the debug info within comments, \'mediaquery\''); + console.log(' that will output the information within a fake'); + console.log(' media query which is compatible with the SASS'); + console.log(' format, and \'all\' which will do both.'); + console.log(' -x, --compress Compresses output by removing some whitespaces.'); + console.log(' We recommend you use a dedicated minifer like less-plugin-clean-css'); + console.log(''); + console.log('Report bugs to: http://github.com/less/less.js/issues'); + console.log('Home page: '); + } + }; // Exports helper functions + + for (const h in lessc_helper) { + if (lessc_helper.hasOwnProperty(h)) { + exports[h] = lessc_helper[h]; + } + } +}); + +/** + * Node Plugin Loader + */ + +class PluginLoader extends AbstractPluginLoader { + constructor(less) { + this.less = less; + + this.require = prefix => { + prefix = path.dirname(prefix); + return id => { + const str = id.substr(0, 2); + + if (str === '..' || str === './') { + return require(path.join(prefix, id)); + } else { + return require(id); + } + }; + }; + } + + loadPlugin(filename, basePath, context, environment, fileManager) { + const prefix = filename.slice(0, 1); + const explicit = prefix === '.' || prefix === '/' || filename.slice(-3).toLowerCase() === '.js'; + + if (!explicit) { + context.prefixes = ['less-plugin-', '']; + } + + return new Promise((fulfill, reject) => { + fileManager.loadFile(filename, basePath, context, environment).then(data => { + try { + fulfill(data); + } catch (e) { + console.log(e); + reject(e); + } + }).catch(err => { + reject(err); + }); + }); + } + +} + +// Export a new default each time +var defaultOptions = (() => ({ + /* Inline Javascript - @plugin still allowed */ + javascriptEnabled: false, + + /* Outputs a makefile import dependency list to stdout. */ + depends: false, + + /* (DEPRECATED) Compress using less built-in compression. + * This does an okay job but does not utilise all the tricks of + * dedicated css compression. */ + compress: false, + + /* Runs the less parser and just reports errors without any output. */ + lint: false, + + /* Sets available include paths. + * If the file in an @import rule does not exist at that exact location, + * less will look for it at the location(s) passed to this option. + * You might use this for instance to specify a path to a library which + * you want to be referenced simply and relatively in the less files. */ + paths: [], + + /* color output in the terminal */ + color: true, + + /* The strictImports controls whether the compiler will allow an @import inside of either + * @media blocks or (a later addition) other selector blocks. + * See: https://github.com/less/less.js/issues/656 */ + strictImports: false, + + /* Allow Imports from Insecure HTTPS Hosts */ + insecure: false, + + /* Allows you to add a path to every generated import and url in your css. + * This does not affect less import statements that are processed, just ones + * that are left in the output css. */ + rootpath: '', + + /* By default URLs are kept as-is, so if you import a file in a sub-directory + * that references an image, exactly the same URL will be output in the css. + * This option allows you to re-write URL's in imported files so that the + * URL is always relative to the base imported file */ + rewriteUrls: false, + + /* Compatibility with IE8. Used for limiting data-uri length */ + // true until 3.0 + ieCompat: false, + + /* How to process math + * 0 always - eagerly try to solve all operations + * 1 parens-division - require parens for division "/" + * 2 parens | strict - require parens for all operations + * 3 strict-legacy - legacy strict behavior (super-strict) + */ + math: 0, + + /* Without this option, less attempts to guess at the output unit when it does maths. */ + strictUnits: false, + + /* Effectively the declaration is put at the top of your base Less file, + * meaning it can be used but it also can be overridden if this variable + * is defined in the file. */ + globalVars: null, + + /* As opposed to the global variable option, this puts the declaration at the + * end of your base file, meaning it will override anything defined in your Less file. */ + modifyVars: null, + + /* This option allows you to specify a argument to go on to every URL. */ + urlArgs: '' +})); + +var imageSize = (environment => { + function _imageSize(functionContext, filePathNode) { + let filePath = filePathNode.value; + const currentFileInfo = functionContext.currentFileInfo; + const currentDirectory = currentFileInfo.rewriteUrls ? currentFileInfo.currentDirectory : currentFileInfo.entryPath; + const fragmentStart = filePath.indexOf('#'); + let fragment = ''; + + if (fragmentStart !== -1) { + fragment = filePath.slice(fragmentStart); + filePath = filePath.slice(0, fragmentStart); + } + + const fileManager = environment.getFileManager(filePath, currentDirectory, functionContext.context, environment, true); + + if (!fileManager) { + throw { + type: 'File', + message: `Can not set up FileManager for ${filePathNode}` + }; + } + + const fileSync = fileManager.loadFileSync(filePath, currentDirectory, functionContext.context, environment); + + if (fileSync.error) { + throw fileSync.error; + } + + const sizeOf = require('image-size'); + + return sizeOf(fileSync.filename); + } + + const imageFunctions = { + 'image-size': function imageSize(filePathNode) { + const size = _imageSize(this, filePathNode); + + return new Expression([new Dimension(size.width, 'px'), new Dimension(size.height, 'px')]); + }, + 'image-width': function imageWidth(filePathNode) { + const size = _imageSize(this, filePathNode); + + return new Dimension(size.width, 'px'); + }, + 'image-height': function imageHeight(filePathNode) { + const size = _imageSize(this, filePathNode); + + return new Dimension(size.height, 'px'); + } + }; + functionRegistry.addMultiple(imageFunctions); +}); + +const less = createFromEnvironment(environment, [new FileManager(), new UrlFileManager()]); // allow people to create less with their own environment + +less.createFromEnvironment = createFromEnvironment; +less.lesscHelper = lesscHelper; +less.PluginLoader = PluginLoader; +less.fs = fs$1; +less.FileManager = FileManager; +less.UrlFileManager = UrlFileManager; // Set up options + +less.options = defaultOptions(); // provide image-size functionality + +imageSize(less.environment); + +module.exports = less; diff --git a/dist/less.js b/dist/less.js index 35f8899c5..551d9daa4 100644 --- a/dist/less.js +++ b/dist/less.js @@ -8570,12 +8570,12 @@ var testChar; if (typeof tok === 'string') { - testChar = function testChar(_char) { - return _char === tok; + testChar = function testChar(char) { + return char === tok; }; } else { - testChar = function testChar(_char2) { - return tok.test(_char2); + testChar = function testChar(char) { + return tok.test(char); }; } @@ -9227,7 +9227,7 @@ and `expect` available only here */ return { alpha: f(parsers.ieAlpha, true), - "boolean": f(condition), + boolean: f(condition), 'if': f(condition) }[name.toLowerCase()]; @@ -10420,12 +10420,12 @@ var result = []; function testCurrentChar() { - var _char = parserInput.currentChar(); + var char = parserInput.currentChar(); if (typeof tok === 'string') { - return _char === tok; + return char === tok; } else { - return tok.test(_char); + return tok.test(char); } } @@ -11323,7 +11323,7 @@ return s; }; - function _boolean(condition) { + function boolean(condition) { return condition ? Keyword.True : Keyword.False; } @@ -11331,8 +11331,8 @@ return condition ? trueValue : falseValue || new Anonymous(); } - var _boolean$1 = { - "boolean": _boolean, + var boolean$1 = { + boolean: boolean, 'if': If }; @@ -12380,7 +12380,7 @@ functionCaller: functionCaller }; // register functions - functionRegistry.addMultiple(_boolean$1); + functionRegistry.addMultiple(boolean$1); functionRegistry.addMultiple(defaultFunc$1); functionRegistry.addMultiple(color); functionRegistry.addMultiple(colorBlend); @@ -13445,13 +13445,11 @@ /* global window, XMLHttpRequest */ var FM = (function (options, logger) { - var AbstractFileManager = require('../less/environment/abstract-file-manager.js'); - var fileCache = {}; // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load var FileManager = function FileManager() {}; - FileManager.prototype = new AbstractFileManager(); + FileManager.prototype = new abstractFileManager(); FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() { return true; @@ -13591,7 +13589,7 @@ key: "loadPlugin", value: function loadPlugin(filename, basePath, context, environment, fileManager) { return new Promise(function (fulfill, reject) { - fileManager.loadFile(filename, basePath, context, environment).then(fulfill)["catch"](reject); + fileManager.loadFile(filename, basePath, context, environment).then(fulfill).catch(reject); }); } }]); @@ -13951,7 +13949,7 @@ fileManager.loadFile(sheet.href, null, instanceOptions, environment).then(function (loadedFile) { loadInitialFileCallback(loadedFile); - })["catch"](function (err) { + }).catch(function (err) { console.log(err); callback(err); }); @@ -14166,4 +14164,3 @@ return less; })); -//# sourceMappingURL=less.js.map diff --git a/package.json b/package.json index f0b95cdd9..b7fb9d0b9 100644 --- a/package.json +++ b/package.json @@ -51,6 +51,7 @@ "source-map": "~0.6.0" }, "devDependencies": { + "@babel/cli": "^7.5.5", "@babel/core": "^7.5.5", "@babel/preset-env": "^7.5.5", "@typescript-eslint/eslint-plugin": "^1.13.0", @@ -85,6 +86,7 @@ "rollup-plugin-babel": "^4.3.3", "rollup-plugin-commonjs": "^10.0.1", "rollup-plugin-node-resolve": "^5.2.0", + "rollup-plugin-terser": "^5.1.1", "time-grunt": "^1.3.0", "uikit": "2.27.4" }, From 42fa55ee0bae955d6da2d723e2df0c440a5f6259 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Thu, 1 Aug 2019 22:37:08 -0700 Subject: [PATCH 05/17] All tests passing --- .eslintignore | 2 + Gruntfile.js | 212 +- bin/lessc | 13545 +++++++++++++++- build/banner.js | 13 + lebab-convert.js => build/lebab-convert.js | 4 +- build/rollup.js | 187 +- dist/less.js | 10 + dist/less.js.map | 1 - dist/less.min.js | 20 +- dist/less.min.js.map | 1 + lib/less-browser/error-reporting.js | 3 +- lib/less-browser/file-manager.js | 46 +- lib/less-browser/index.js | 20 +- lib/less-browser/plugin-loader.js | 2 + lib/less-node/environment.js | 9 +- lib/less-node/file-manager.js | 2 + lib/less-node/image-size.js | 2 +- lib/less-node/plugin-loader.js | 2 + lib/less-node/url-file-manager.js | 73 +- lib/less/contexts.js | 173 +- lib/less/default-options.js | 64 +- lib/less/environment/abstract-file-manager.js | 222 +- lib/less/functions/color-blending.js | 4 +- lib/less/functions/default.js | 2 +- lib/less/functions/function-caller.js | 28 +- lib/less/functions/index.js | 2 +- lib/less/functions/list.js | 8 +- lib/less/functions/number.js | 2 +- lib/less/index.js | 24 +- lib/less/parse-tree.js | 3 +- lib/less/parser/parser-input.js | 16 +- lib/less/parser/parser.js | 8 +- lib/less/plugin-manager.js | 12 +- lib/less/transform-tree.js | 10 +- lib/less/tree/anonymous.js | 2 + lib/less/tree/assignment.js | 2 + lib/less/tree/atrule.js | 2 + lib/less/tree/attribute.js | 2 + lib/less/tree/call.js | 2 + lib/less/tree/color.js | 8 +- lib/less/tree/combinator.js | 13 +- lib/less/tree/comment.js | 2 + lib/less/tree/condition.js | 2 + lib/less/tree/debug-info.js | 10 +- lib/less/tree/declaration.js | 22 +- lib/less/tree/detached-ruleset.js | 2 + lib/less/tree/dimension.js | 7 +- lib/less/tree/element.js | 12 +- lib/less/tree/expression.js | 2 + lib/less/tree/extend.js | 2 + lib/less/tree/import.js | 2 + lib/less/tree/javascript.js | 2 + lib/less/tree/js-eval-node.js | 93 +- lib/less/tree/keyword.js | 6 +- lib/less/tree/media.js | 6 +- lib/less/tree/mixin-call.js | 24 +- lib/less/tree/mixin-definition.js | 6 +- lib/less/tree/namespace-value.js | 2 + lib/less/tree/negative.js | 2 + lib/less/tree/node.js | 2 +- lib/less/tree/operation.js | 2 + lib/less/tree/paren.js | 2 + lib/less/tree/property.js | 2 + lib/less/tree/quoted.js | 2 + lib/less/tree/ruleset.js | 4 +- lib/less/tree/selector.js | 2 + lib/less/tree/unicode-descriptor.js | 2 + lib/less/tree/unit.js | 2 + lib/less/tree/url.js | 2 + lib/less/tree/value.js | 2 + lib/less/tree/variable-call.js | 3 + lib/less/tree/variable.js | 2 + lib/less/utils.js | 32 +- lib/less/visitors/extend-visitor.js | 2 +- lib/lessc.js | 557 + package.json | 7 +- test/browser/common.js | 60 +- test/browser/css/urls.css | 3 - test/browser/less/urls.less | 3 - test/css/urls.css | 1 - test/index.js | 7 +- test/less-test.js | 22 +- test/less/urls.less | 1 - 83 files changed, 14472 insertions(+), 1219 deletions(-) mode change 100755 => 100644 bin/lessc create mode 100644 build/banner.js rename lebab-convert.js => build/lebab-convert.js (90%) delete mode 100644 dist/less.js.map create mode 100644 dist/less.min.js.map create mode 100755 lib/lessc.js diff --git a/.eslintignore b/.eslintignore index 433176838..7c1aeb460 100644 --- a/.eslintignore +++ b/.eslintignore @@ -1,2 +1,4 @@ Gruntfile.js +dist/* +tmp/* test/browser/vendor/* \ No newline at end of file diff --git a/Gruntfile.js b/Gruntfile.js index 3ab8c6448..e0d9c4c3b 100644 --- a/Gruntfile.js +++ b/Gruntfile.js @@ -8,7 +8,6 @@ module.exports = function(grunt) { var COMPRESS_FOR_TESTS = false; var git = require("git-rev"); - var babel = require('rollup-plugin-babel'); // Sauce Labs browser var browsers = [ @@ -91,17 +90,17 @@ module.exports = function(grunt) { urls: testName === "all" ? browserTests.map(function(name) { - return ( - "http://localhost:8081/tmp/browser/test-runner-" + + return ( + "http://localhost:8081/tmp/browser/test-runner-" + name + ".html" - ); - }) + ); + }) : [ - "http://localhost:8081/tmp/browser/test-runner-" + + "http://localhost:8081/tmp/browser/test-runner-" + testName + ".html" - ], + ], testname: testName === "all" ? "Unit Tests for Less.js" : testName, browsers: browsers, @@ -181,23 +180,6 @@ module.exports = function(grunt) { // Project configuration. grunt.initConfig({ - pkg: grunt.file.readJSON("package.json"), - meta: { - copyright: 'Copyright (c) 2009-<%= grunt.template.today("yyyy") %>', - banner: - "/*!\n" + - " * Less - <%= pkg.description %> v<%= pkg.version %>\n" + - " * http://lesscss.org\n" + - " *\n" + - " * <%= meta.copyright %>, <%= pkg.author.name %> <<%= pkg.author.email %>>\n" + - " * Licensed under the <%= pkg.license %> License.\n" + - " *\n" + - " */\n\n" + - " /**" + - " * @license <%= pkg.license %>\n" + - " */\n\n" - }, - shell: { options: { stdout: true, @@ -206,6 +188,19 @@ module.exports = function(grunt) { maxBuffer: Infinity } }, + build: { + command: [ + "node build/rollup.js --dist", + "node build/rollup.js --lessc" + ].join(" && ") + }, + testbuild: { + command: [ + "node build/rollup.js --lessc --out='tmp/lessc'", + "node build/rollup.js --node --out='tmp/less.cjs.js'", + "node build/rollup.js --browser out='test/browser/less.min.js'" + ].join(" && ") + }, test: { command: "node test/index.js" }, @@ -218,121 +213,94 @@ module.exports = function(grunt) { // @TODO: make this more thorough // CURRENT OPTIONS // --math - "node bin/lessc --math=always test/less/lazy-eval.less tmp/lazy-eval.css", - "node bin/lessc --math=parens-division test/less/lazy-eval.less tmp/lazy-eval.css", - "node bin/lessc --math=parens test/less/lazy-eval.less tmp/lazy-eval.css", - "node bin/lessc --math=strict test/less/lazy-eval.less tmp/lazy-eval.css", - "node bin/lessc --math=strict-legacy test/less/lazy-eval.less tmp/lazy-eval.css", + "node tmp/lessc --math=always test/less/lazy-eval.less tmp/lazy-eval.css", + "node tmp/lessc --math=parens-division test/less/lazy-eval.less tmp/lazy-eval.css", + "node tmp/lessc --math=parens test/less/lazy-eval.less tmp/lazy-eval.css", + "node tmp/lessc --math=strict test/less/lazy-eval.less tmp/lazy-eval.css", + "node tmp/lessc --math=strict-legacy test/less/lazy-eval.less tmp/lazy-eval.css", // DEPRECATED OPTIONS // --strict-math - "node bin/lessc --strict-math=on test/less/lazy-eval.less tmp/lazy-eval.css" + "node tmp/lessc --strict-math=on test/less/lazy-eval.less tmp/lazy-eval.css" ].join(" && ") }, plugin: { command: [ - 'node bin/lessc --clean-css="--s1 --advanced" test/less/lazy-eval.less tmp/lazy-eval.css', + 'node tmp/lessc --clean-css="--s1 --advanced" test/less/lazy-eval.less tmp/lazy-eval.css', "cd lib", - 'node ../bin/lessc --clean-css="--s1 --advanced" ../test/less/lazy-eval.less ../tmp/lazy-eval.css', + 'node ../tmp/lessc --clean-css="--s1 --advanced" ../test/less/lazy-eval.less ../tmp/lazy-eval.css', "cd ..", // Test multiple plugins - 'node bin/lessc --plugin=clean-css="--s1 --advanced" --plugin=autoprefix="ie 11,Edge >= 13,Chrome >= 47,Firefox >= 45,iOS >= 9.2,Safari >= 9" test/less/lazy-eval.less tmp/lazy-eval.css' + 'node tmp/lessc --plugin=clean-css="--s1 --advanced" --plugin=autoprefix="ie 11,Edge >= 13,Chrome >= 47,Firefox >= 45,iOS >= 9.2,Safari >= 9" test/less/lazy-eval.less tmp/lazy-eval.css' ].join(" && ") }, "sourcemap-test": { // quoted value doesn't seem to get picked up by time-grunt, or isn't output, at least; maybe just "sourcemap" is fine? command: [ - "node bin/lessc --source-map=test/sourcemaps/maps/import-map.map test/less/import.less test/sourcemaps/import.css", - "node bin/lessc --source-map test/less/sourcemaps/basic.less test/sourcemaps/basic.css" + "node tmp/lessc --source-map=test/sourcemaps/maps/import-map.map test/less/import.less test/sourcemaps/import.css", + "node tmp/lessc --source-map test/less/sourcemaps/basic.less test/sourcemaps/basic.css" ].join(" && ") } }, - browserify: { - browser: { - src: ["./lib/less-browser/bootstrap.js"], - options: { - exclude: ["promise"], - browserifyOptions: { - standalone: "less", - noParse: ["clone"] - } - }, - dest: "tmp/less.js" - } - }, - concat: { - options: { - stripBanners: "all", - banner: "<%= meta.banner %>" - }, - browsertest: { - src: COMPRESS_FOR_TESTS - ? "<%= uglify.test.dest %>" - : "<%= browserify.browser.dest %>", - dest: "test/browser/less.js" - }, - dist: { - src: "<%= browserify.browser.dest %>", - dest: "dist/less.js" - } - }, - - uglify: { - options: { - banner: "<%= meta.banner %>", - mangle: true, - compress: { - pure_getters: true - } - }, - dist: { - src: ["<%= concat.dist.dest %>"], - dest: "dist/less.min.js" - }, - test: { - src: "<%= browserify.browser.dest %>", - dest: "tmp/less.min.js" - } - }, + // browserify: { + // browser: { + // src: ["./lib/less-browser/bootstrap.js"], + // options: { + // exclude: ["promise"], + // browserifyOptions: { + // standalone: "less", + // noParse: ["clone"] + // } + // }, + // dest: "tmp/less.js" + // } + // }, + // concat: { + // options: { + // stripBanners: "all", + // banner: "<%= meta.banner %>" + // }, + // browsertest: { + // src: COMPRESS_FOR_TESTS + // ? "<%= uglify.test.dest %>" + // : "<%= browserify.browser.dest %>", + // dest: "test/browser/less.js" + // }, + // dist: { + // src: "<%= browserify.browser.dest %>", + // dest: "dist/less.js" + // } + // }, + + // uglify: { + // options: { + // banner: "<%= meta.banner %>", + // mangle: true, + // compress: { + // pure_getters: true + // } + // }, + // dist: { + // src: ["<%= concat.dist.dest %>"], + // dest: "dist/less.min.js" + // }, + // test: { + // src: "<%= browserify.browser.dest %>", + // dest: "tmp/less.min.js" + // } + // }, eslint: { target: [ - "Gruntfile.js", "test/**/*.js", "lib/less*/**/*.js", - "bin/lessc", "!test/browser/jasmine-jsreporter.js", "!test/less/errors/plugin/plugin-error.js" ], options: { - configFile: ".eslintrc.json" - } - }, - - rollup: { - browser: { - input: './lib/less-browser/index.js', - plugins: [ - babel({}) - ], - output: { - file: './dist/less.js', - format: 'umd', - name: 'less' - } - }, - node: { - input: './lib/less-node/index.js', - plugins: [ - babel({ - exclude: 'node_modules/**' - }) - ], - output: { - file: './dist/less.cjs.js', - format: 'cjs' - } + configFile: ".eslintrc.json", + fix: true } }, @@ -353,7 +321,7 @@ module.exports = function(grunt) { "test/browser/vendor/promise.js", "test/browser/jasmine-jsreporter.js", "test/browser/common.js", - "test/browser/less.js" + "test/browser/less.min.js" ], template: "test/browser/test-runner-template.tmpl" }, @@ -559,16 +527,12 @@ module.exports = function(grunt) { // Release grunt.registerTask("dist", [ - "browserify:browser", - "concat:dist", - "uglify:dist" + "shell:build" ]); // Create the browser version of less.js grunt.registerTask("browsertest-lessjs", [ - "browserify:browser", - "uglify:test", - "concat:browsertest" + "shell:testbuild" ]); // Run all browser tests @@ -612,10 +576,12 @@ module.exports = function(grunt) { var testTasks = [ "clean", "eslint", + "shell:testbuild", "shell:test", "shell:opts", "shell:plugin", - "browsertest" + "connect", + "jasmine" ]; if ( @@ -638,21 +604,17 @@ module.exports = function(grunt) { // Run shell plugin test grunt.registerTask("shell-plugin", ["shell:plugin"]); - // Run all tests + // Run all tests except browsertest grunt.registerTask("quicktest", testTasks.slice(0, -1)); // generate a good test environment for testing sourcemaps grunt.registerTask("sourcemap-test", [ "clean:sourcemap-test", + "shell:build:lessc", "shell:sourcemap-test", "connect::keepalive" ]); // Run benchmark grunt.registerTask("benchmark", ["shell:benchmark"]); - - grunt.registerTask("rollup", [ - "rollup:browser", - "rollup:node" - ]); }; diff --git a/bin/lessc b/bin/lessc old mode 100755 new mode 100644 index c0dbf3e67..0f5cfad85 --- a/bin/lessc +++ b/bin/lessc @@ -1,36 +1,12547 @@ #!/usr/bin/env node -var path = require('path'), - fs = require('../lib/less-node/fs'), - os = require('os'), - utils = require('../lib/less/utils'), - Constants = require('../lib/less/constants'), - errno, - mkdirp; +'use strict'; + +function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; } + +var path = _interopDefault(require('path')); +var os = _interopDefault(require('os')); +var CloneHelper = _interopDefault(require('clone')); +var mime = _interopDefault(require('mime')); +var sourceMap = _interopDefault(require('source-map')); +var url = _interopDefault(require('url')); + +let fs; + +try { + fs = require('graceful-fs'); +} catch (e) { + fs = require('fs'); +} + +var fs$1 = fs; + +const Math$1 = { + ALWAYS: 0, + PARENS_DIVISION: 1, + PARENS: 2, + STRICT_LEGACY: 3 +}; +const RewriteUrls = { + OFF: 0, + LOCAL: 1, + ALL: 2 +}; + +/* jshint proto: true */ +function getLocation(index, inputStream) { + let n = index + 1; + let line = null; + let column = -1; + + while (--n >= 0 && inputStream.charAt(n) !== '\n') { + column++; + } + + if (typeof index === 'number') { + line = (inputStream.slice(0, index).match(/\n/g) || '').length; + } + + return { + line, + column + }; +} +function copyArray(arr) { + let i; + const length = arr.length; + const copy = new Array(length); + + for (i = 0; i < length; i++) { + copy[i] = arr[i]; + } + + return copy; +} +function clone(obj) { + const cloned = {}; + + for (const prop in obj) { + if (obj.hasOwnProperty(prop)) { + cloned[prop] = obj[prop]; + } + } + + return cloned; +} +function copyOptions(obj1, obj2) { + if (obj2 && obj2._defaults) { + return obj2; + } + + const opts = utils.defaults(obj1, obj2); + + if (opts.strictMath) { + opts.math = Math$1.STRICT_LEGACY; + } // Back compat with changed relativeUrls option + + + if (opts.relativeUrls) { + opts.rewriteUrls = RewriteUrls.ALL; + } + + if (typeof opts.math === 'string') { + switch (opts.math.toLowerCase()) { + case 'always': + opts.math = Math$1.ALWAYS; + break; + + case 'parens-division': + opts.math = Math$1.PARENS_DIVISION; + break; + + case 'strict': + case 'parens': + opts.math = Math$1.PARENS; + break; + + case 'strict-legacy': + opts.math = Math$1.STRICT_LEGACY; + } + } + + if (typeof opts.rewriteUrls === 'string') { + switch (opts.rewriteUrls.toLowerCase()) { + case 'off': + opts.rewriteUrls = RewriteUrls.OFF; + break; + + case 'local': + opts.rewriteUrls = RewriteUrls.LOCAL; + break; + + case 'all': + opts.rewriteUrls = RewriteUrls.ALL; + break; + } + } + + return opts; +} +function defaults(obj1, obj2) { + let newObj = obj2 || {}; + + if (!obj2._defaults) { + newObj = {}; + const defaults = CloneHelper(obj1); + newObj._defaults = defaults; + const cloned = obj2 ? CloneHelper(obj2) : {}; + Object.assign(newObj, defaults, cloned); + } + + return newObj; +} +function merge(obj1, obj2) { + for (const prop in obj2) { + if (obj2.hasOwnProperty(prop)) { + obj1[prop] = obj2[prop]; + } + } + + return obj1; +} +function flattenArray(arr, result = []) { + for (let i = 0, length = arr.length; i < length; i++) { + const value = arr[i]; + + if (Array.isArray(value)) { + utils.flattenArray(value, result); + } else { + if (value !== undefined) { + result.push(value); + } + } + } + + return result; +} + +var utils$1 = /*#__PURE__*/Object.freeze({ + getLocation: getLocation, + copyArray: copyArray, + clone: clone, + copyOptions: copyOptions, + defaults: defaults, + merge: merge, + flattenArray: flattenArray +}); + +var environment = { + encodeBase64: function encodeBase64(str) { + // Avoid Buffer constructor on newer versions of Node.js. + const buffer = Buffer.from ? Buffer.from(str) : new Buffer(str); + return buffer.toString('base64'); + }, + mimeLookup: function mimeLookup(filename) { + return mime.lookup(filename); + }, + charsetLookup: function charsetLookup(mime) { + return mime.charsets.lookup(mime); + }, + getSourceMapGenerator: function getSourceMapGenerator() { + return sourceMap.SourceMapGenerator; + } +}; + +const abstractFileManager = () => {}; + +abstractFileManager.prototype.getPath = filename => { + let j = filename.lastIndexOf('?'); + + if (j > 0) { + filename = filename.slice(0, j); + } + + j = filename.lastIndexOf('/'); + + if (j < 0) { + j = filename.lastIndexOf('\\'); + } + + if (j < 0) { + return ''; + } + + return filename.slice(0, j + 1); +}; + +abstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + +abstractFileManager.prototype.tryAppendLessExtension = function (path) { + return this.tryAppendExtension(path, '.less'); +}; + +abstractFileManager.prototype.supportsSync = () => false; + +abstractFileManager.prototype.alwaysMakePathsAbsolute = () => false; + +abstractFileManager.prototype.isPathAbsolute = filename => /^(?:[a-z-]+:|\/|\\|#)/i.test(filename); // TODO: pull out / replace? + + +abstractFileManager.prototype.join = (basePath, laterPath) => { + if (!basePath) { + return laterPath; + } + + return basePath + laterPath; +}; + +abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { + // diff between two paths to create a relative path + const urlParts = this.extractUrlParts(url); + const baseUrlParts = this.extractUrlParts(baseUrl); + let i; + let max; + let urlDirectories; + let baseUrlDirectories; + let diff = ''; + + if (urlParts.hostPart !== baseUrlParts.hostPart) { + return ''; + } + + max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); + + for (i = 0; i < max; i++) { + if (baseUrlParts.directories[i] !== urlParts.directories[i]) { + break; + } + } + + baseUrlDirectories = baseUrlParts.directories.slice(i); + urlDirectories = urlParts.directories.slice(i); + + for (i = 0; i < baseUrlDirectories.length - 1; i++) { + diff += '../'; + } + + for (i = 0; i < urlDirectories.length - 1; i++) { + diff += `${urlDirectories[i]}/`; + } + + return diff; +}; // helper function, not part of API + + +abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) { + // urlParts[1] = protocol://hostname/ OR / + // urlParts[2] = / if path relative to host base + // urlParts[3] = directories + // urlParts[4] = filename + // urlParts[5] = parameters + const urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; + const urlParts = url.match(urlPartsRegex); + const returner = {}; + let rawDirectories = []; + const directories = []; + let i; + let baseUrlParts; + + if (!urlParts) { + throw new Error(`Could not parse sheet href - '${url}'`); + } // Stylesheets in IE don't always return the full path + + + if (baseUrl && (!urlParts[1] || urlParts[2])) { + baseUrlParts = baseUrl.match(urlPartsRegex); + + if (!baseUrlParts) { + throw new Error(`Could not parse page url - '${baseUrl}'`); + } + + urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; + + if (!urlParts[2]) { + urlParts[3] = baseUrlParts[3] + urlParts[3]; + } + } + + if (urlParts[3]) { + rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); // collapse '..' and skip '.' + + for (i = 0; i < rawDirectories.length; i++) { + if (rawDirectories[i] === '..') { + directories.pop(); + } else if (rawDirectories[i] !== '.') { + directories.push(rawDirectories[i]); + } + } + } + + returner.hostPart = urlParts[1]; + returner.directories = directories; + returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); + returner.path = (urlParts[1] || '') + directories.join('/'); + returner.filename = urlParts[4]; + returner.fileUrl = returner.path + (urlParts[4] || ''); + returner.url = returner.fileUrl + (urlParts[5] || ''); + return returner; +}; + +class FileManager extends abstractFileManager { + constructor() { + this.contents = {}; + } + + supports(filename, currentDirectory, options, environment) { + return true; + } + + supportsSync(filename, currentDirectory, options, environment) { + return true; + } + + loadFile(filename, currentDirectory, options, environment, callback) { + let fullFilename; + const isAbsoluteFilename = this.isPathAbsolute(filename); + const filenamesTried = []; + const self = this; + const prefix = filename.slice(0, 1); + const explicit = prefix === '.' || prefix === '/'; + let result = null; + let isNodeModule = false; + const npmPrefix = 'npm://'; + options = options || {}; + const paths = isAbsoluteFilename ? [''] : [currentDirectory]; + + if (options.paths) { + paths.push(...options.paths); + } + + if (!isAbsoluteFilename && paths.indexOf('.') === -1) { + paths.push('.'); + } + + const prefixes = options.prefixes || ['']; + const fileParts = this.extractUrlParts(filename); + + if (options.syncImport) { + getFileData(returnData, returnData); + + if (callback) { + callback(result.error, result); + } else { + return result; + } + } else { + // promise is guaranteed to be asyncronous + // which helps as it allows the file handle + // to be closed before it continues with the next file + return new Promise(getFileData); + } + + function returnData(data) { + if (!data.filename) { + result = { + error: data + }; + } else { + result = data; + } + } + + function getFileData(fulfill, reject) { + (function tryPathIndex(i) { + if (i < paths.length) { + (function tryPrefix(j) { + if (j < prefixes.length) { + isNodeModule = false; + fullFilename = fileParts.rawPath + prefixes[j] + fileParts.filename; + + if (paths[i]) { + fullFilename = path.join(paths[i], fullFilename); + } + + if (!explicit && paths[i] === '.') { + try { + fullFilename = require.resolve(fullFilename); + isNodeModule = true; + } catch (e) { + filenamesTried.push(npmPrefix + fullFilename); + tryWithExtension(); + } + } else { + tryWithExtension(); + } + + function tryWithExtension() { + const extFilename = options.ext ? self.tryAppendExtension(fullFilename, options.ext) : fullFilename; + + if (extFilename !== fullFilename && !explicit && paths[i] === '.') { + try { + fullFilename = require.resolve(extFilename); + isNodeModule = true; + } catch (e) { + filenamesTried.push(npmPrefix + extFilename); + fullFilename = extFilename; + } + } else { + fullFilename = extFilename; + } + } + + let modified = false; + + if (self.contents[fullFilename]) { + try { + var stat = fs$1.statSync.apply(this, [fullFilename]); + + if (stat.mtime.getTime() === self.contents[fullFilename].mtime.getTime()) { + fulfill({ + contents: self.contents[fullFilename].data, + filename: fullFilename + }); + } else { + modified = true; + } + } catch (e) { + modified = true; + } + } + + if (modified || !self.contents[fullFilename]) { + const readFileArgs = [fullFilename]; + + if (!options.rawBuffer) { + readFileArgs.push('utf-8'); + } + + if (options.syncImport) { + try { + const data = fs$1.readFileSync.apply(this, readFileArgs); + var stat = fs$1.statSync.apply(this, [fullFilename]); + self.contents[fullFilename] = { + data, + mtime: stat.mtime + }; + fulfill({ + contents: data, + filename: fullFilename + }); + } catch (e) { + filenamesTried.push(isNodeModule ? npmPrefix + fullFilename : fullFilename); + return tryPrefix(j + 1); + } + } else { + readFileArgs.push(function (e, data) { + if (e) { + filenamesTried.push(isNodeModule ? npmPrefix + fullFilename : fullFilename); + return tryPrefix(j + 1); + } + + const stat = fs$1.statSync.apply(this, [fullFilename]); + self.contents[fullFilename] = { + data, + mtime: stat.mtime + }; + fulfill({ + contents: data, + filename: fullFilename + }); + }); + fs$1.readFile.apply(this, readFileArgs); + } + } + } else { + tryPathIndex(i + 1); + } + })(0); + } else { + reject({ + type: 'File', + message: `'${filename}' wasn't found. Tried - ${filenamesTried.join(',')}` + }); + } + })(0); + } + } + + loadFileSync(filename, currentDirectory, options, environment) { + options.syncImport = true; + return this.loadFile(filename, currentDirectory, options, environment); + } + +} + +var logger = { + error: function error(msg) { + this._fireEvent('error', msg); + }, + warn: function warn(msg) { + this._fireEvent('warn', msg); + }, + info: function info(msg) { + this._fireEvent('info', msg); + }, + debug: function debug(msg) { + this._fireEvent('debug', msg); + }, + addListener: function addListener(listener) { + this._listeners.push(listener); + }, + removeListener: function removeListener(listener) { + for (let i = 0; i < this._listeners.length; i++) { + if (this._listeners[i] === listener) { + this._listeners.splice(i, 1); + + return; + } + } + }, + _fireEvent: function _fireEvent(type, msg) { + for (let i = 0; i < this._listeners.length; i++) { + const logFunction = this._listeners[i][type]; + + if (logFunction) { + logFunction(msg); + } + } + }, + _listeners: [] +}; + +const isUrlRe = /^(?:https?:)?\/\//i; +let request; + +const UrlFileManager = () => {}; + +UrlFileManager.prototype = new abstractFileManager(); + +UrlFileManager.prototype.supports = (filename, currentDirectory, options, environment) => isUrlRe.test(filename) || isUrlRe.test(currentDirectory); + +UrlFileManager.prototype.loadFile = (filename, currentDirectory, options, environment) => { + return new Promise((fulfill, reject) => { + if (request === undefined) { + try { + request = require('request'); + } catch (e) { + request = null; + } + } + + if (!request) { + reject({ + type: 'File', + message: 'optional dependency \'request\' required to import over http(s)\n' + }); + return; + } + + let urlStr = isUrlRe.test(filename) ? filename : url.resolve(currentDirectory, filename); + const urlObj = url.parse(urlStr); + + if (!urlObj.protocol) { + urlObj.protocol = 'http'; + urlStr = urlObj.format(); + } + + request.get({ + uri: urlStr, + strictSSL: !options.insecure + }, (error, res, body) => { + if (error) { + reject({ + type: 'File', + message: `resource '${urlStr}' gave this Error:\n ${error}\n` + }); + return; + } + + if (res && res.statusCode === 404) { + reject({ + type: 'File', + message: `resource '${urlStr}' was not found\n` + }); + return; + } + + if (!body) { + logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`); + } + + fulfill({ + contents: body, + filename: urlStr + }); + }); + }); +}; + +var colors = { + 'aliceblue': '#f0f8ff', + 'antiquewhite': '#faebd7', + 'aqua': '#00ffff', + 'aquamarine': '#7fffd4', + 'azure': '#f0ffff', + 'beige': '#f5f5dc', + 'bisque': '#ffe4c4', + 'black': '#000000', + 'blanchedalmond': '#ffebcd', + 'blue': '#0000ff', + 'blueviolet': '#8a2be2', + 'brown': '#a52a2a', + 'burlywood': '#deb887', + 'cadetblue': '#5f9ea0', + 'chartreuse': '#7fff00', + 'chocolate': '#d2691e', + 'coral': '#ff7f50', + 'cornflowerblue': '#6495ed', + 'cornsilk': '#fff8dc', + 'crimson': '#dc143c', + 'cyan': '#00ffff', + 'darkblue': '#00008b', + 'darkcyan': '#008b8b', + 'darkgoldenrod': '#b8860b', + 'darkgray': '#a9a9a9', + 'darkgrey': '#a9a9a9', + 'darkgreen': '#006400', + 'darkkhaki': '#bdb76b', + 'darkmagenta': '#8b008b', + 'darkolivegreen': '#556b2f', + 'darkorange': '#ff8c00', + 'darkorchid': '#9932cc', + 'darkred': '#8b0000', + 'darksalmon': '#e9967a', + 'darkseagreen': '#8fbc8f', + 'darkslateblue': '#483d8b', + 'darkslategray': '#2f4f4f', + 'darkslategrey': '#2f4f4f', + 'darkturquoise': '#00ced1', + 'darkviolet': '#9400d3', + 'deeppink': '#ff1493', + 'deepskyblue': '#00bfff', + 'dimgray': '#696969', + 'dimgrey': '#696969', + 'dodgerblue': '#1e90ff', + 'firebrick': '#b22222', + 'floralwhite': '#fffaf0', + 'forestgreen': '#228b22', + 'fuchsia': '#ff00ff', + 'gainsboro': '#dcdcdc', + 'ghostwhite': '#f8f8ff', + 'gold': '#ffd700', + 'goldenrod': '#daa520', + 'gray': '#808080', + 'grey': '#808080', + 'green': '#008000', + 'greenyellow': '#adff2f', + 'honeydew': '#f0fff0', + 'hotpink': '#ff69b4', + 'indianred': '#cd5c5c', + 'indigo': '#4b0082', + 'ivory': '#fffff0', + 'khaki': '#f0e68c', + 'lavender': '#e6e6fa', + 'lavenderblush': '#fff0f5', + 'lawngreen': '#7cfc00', + 'lemonchiffon': '#fffacd', + 'lightblue': '#add8e6', + 'lightcoral': '#f08080', + 'lightcyan': '#e0ffff', + 'lightgoldenrodyellow': '#fafad2', + 'lightgray': '#d3d3d3', + 'lightgrey': '#d3d3d3', + 'lightgreen': '#90ee90', + 'lightpink': '#ffb6c1', + 'lightsalmon': '#ffa07a', + 'lightseagreen': '#20b2aa', + 'lightskyblue': '#87cefa', + 'lightslategray': '#778899', + 'lightslategrey': '#778899', + 'lightsteelblue': '#b0c4de', + 'lightyellow': '#ffffe0', + 'lime': '#00ff00', + 'limegreen': '#32cd32', + 'linen': '#faf0e6', + 'magenta': '#ff00ff', + 'maroon': '#800000', + 'mediumaquamarine': '#66cdaa', + 'mediumblue': '#0000cd', + 'mediumorchid': '#ba55d3', + 'mediumpurple': '#9370d8', + 'mediumseagreen': '#3cb371', + 'mediumslateblue': '#7b68ee', + 'mediumspringgreen': '#00fa9a', + 'mediumturquoise': '#48d1cc', + 'mediumvioletred': '#c71585', + 'midnightblue': '#191970', + 'mintcream': '#f5fffa', + 'mistyrose': '#ffe4e1', + 'moccasin': '#ffe4b5', + 'navajowhite': '#ffdead', + 'navy': '#000080', + 'oldlace': '#fdf5e6', + 'olive': '#808000', + 'olivedrab': '#6b8e23', + 'orange': '#ffa500', + 'orangered': '#ff4500', + 'orchid': '#da70d6', + 'palegoldenrod': '#eee8aa', + 'palegreen': '#98fb98', + 'paleturquoise': '#afeeee', + 'palevioletred': '#d87093', + 'papayawhip': '#ffefd5', + 'peachpuff': '#ffdab9', + 'peru': '#cd853f', + 'pink': '#ffc0cb', + 'plum': '#dda0dd', + 'powderblue': '#b0e0e6', + 'purple': '#800080', + 'rebeccapurple': '#663399', + 'red': '#ff0000', + 'rosybrown': '#bc8f8f', + 'royalblue': '#4169e1', + 'saddlebrown': '#8b4513', + 'salmon': '#fa8072', + 'sandybrown': '#f4a460', + 'seagreen': '#2e8b57', + 'seashell': '#fff5ee', + 'sienna': '#a0522d', + 'silver': '#c0c0c0', + 'skyblue': '#87ceeb', + 'slateblue': '#6a5acd', + 'slategray': '#708090', + 'slategrey': '#708090', + 'snow': '#fffafa', + 'springgreen': '#00ff7f', + 'steelblue': '#4682b4', + 'tan': '#d2b48c', + 'teal': '#008080', + 'thistle': '#d8bfd8', + 'tomato': '#ff6347', + 'turquoise': '#40e0d0', + 'violet': '#ee82ee', + 'wheat': '#f5deb3', + 'white': '#ffffff', + 'whitesmoke': '#f5f5f5', + 'yellow': '#ffff00', + 'yellowgreen': '#9acd32' +}; + +var unitConversions = { + length: { + 'm': 1, + 'cm': 0.01, + 'mm': 0.001, + 'in': 0.0254, + 'px': 0.0254 / 96, + 'pt': 0.0254 / 72, + 'pc': 0.0254 / 72 * 12 + }, + duration: { + 's': 1, + 'ms': 0.001 + }, + angle: { + 'rad': 1 / (2 * Math.PI), + 'deg': 1 / 360, + 'grad': 1 / 400, + 'turn': 1 + } +}; + +var data = { + colors, + unitConversions +}; + +class Node { + constructor() { + this.parent = null; + this.visibilityBlocks = undefined; + this.nodeVisible = undefined; + this.rootNode = null; + this.parsed = null; + const self = this; + Object.defineProperty(this, 'currentFileInfo', { + get: function get() { + return self.fileInfo(); + } + }); + Object.defineProperty(this, 'index', { + get: function get() { + return self.getIndex(); + } + }); + } + + setParent(nodes, parent) { + function set(node) { + if (node && node instanceof Node) { + node.parent = parent; + } + } + + if (Array.isArray(nodes)) { + nodes.forEach(set); + } else { + set(nodes); + } + } + + getIndex() { + return this._index || this.parent && this.parent.getIndex() || 0; + } + + fileInfo() { + return this._fileInfo || this.parent && this.parent.fileInfo() || {}; + } + + isRulesetLike() { + return false; + } + + toCSS(context) { + const strs = []; + this.genCSS(context, { + add: function add(chunk, fileInfo, index) { + strs.push(chunk); + }, + isEmpty: function isEmpty() { + return strs.length === 0; + } + }); + return strs.join(''); + } + + genCSS(context, output) { + output.add(this.value); + } + + accept(visitor) { + this.value = visitor.visit(this.value); + } + + eval() { + return this; + } + + _operate(context, op, a, b) { + switch (op) { + case '+': + return a + b; + + case '-': + return a - b; + + case '*': + return a * b; + + case '/': + return a / b; + } + } + + fround(context, value) { + const precision = context && context.numPrecision; // add "epsilon" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded: + + return precision ? Number((value + 2e-16).toFixed(precision)) : value; + } // Returns true if this node represents root of ast imported by reference + + + blocksVisibility() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + + return this.visibilityBlocks !== 0; + } + + addVisibilityBlock() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + + this.visibilityBlocks = this.visibilityBlocks + 1; + } + + removeVisibilityBlock() { + if (this.visibilityBlocks == null) { + this.visibilityBlocks = 0; + } + + this.visibilityBlocks = this.visibilityBlocks - 1; + } // Turns on node visibility - if called node will be shown in output regardless + // of whether it comes from import by reference or not + + + ensureVisibility() { + this.nodeVisible = true; + } // Turns off node visibility - if called node will NOT be shown in output regardless + // of whether it comes from import by reference or not + + + ensureInvisibility() { + this.nodeVisible = false; + } // return values: + // false - the node must not be visible + // true - the node must be visible + // undefined or null - the node has the same visibility as its parent + + + isVisible() { + return this.nodeVisible; + } + + visibilityInfo() { + return { + visibilityBlocks: this.visibilityBlocks, + nodeVisible: this.nodeVisible + }; + } + + copyVisibilityInfo(info) { + if (!info) { + return; + } + + this.visibilityBlocks = info.visibilityBlocks; + this.nodeVisible = info.nodeVisible; + } + +} + +Node.compare = (a, b) => { + /* returns: + -1: a < b + 0: a = b + 1: a > b + and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */ + if (a.compare && // for "symmetric results" force toCSS-based comparison + // of Quoted or Anonymous if either value is one of those + !(b.type === 'Quoted' || b.type === 'Anonymous')) { + return a.compare(b); + } else if (b.compare) { + return -b.compare(a); + } else if (a.type !== b.type) { + return undefined; + } + + a = a.value; + b = b.value; + + if (!Array.isArray(a)) { + return a === b ? 0 : undefined; + } + + if (a.length !== b.length) { + return undefined; + } + + for (let i = 0; i < a.length; i++) { + if (Node.compare(a[i], b[i]) !== 0) { + return undefined; + } + } + + return 0; +}; + +Node.numericCompare = (a, b) => a < b ? -1 : a === b ? 0 : a > b ? 1 : undefined; + +// RGB Colors - #ff0014, #eee +// + +class Color extends Node { + constructor(rgb, a, originalForm) { + const self = this; // + // The end goal here, is to parse the arguments + // into an integer triplet, such as `128, 255, 0` + // + // This facilitates operations and conversions. + // + + if (Array.isArray(rgb)) { + this.rgb = rgb; + } else if (rgb.length >= 6) { + this.rgb = []; + rgb.match(/.{2}/g).map((c, i) => { + if (i < 3) { + self.rgb.push(parseInt(c, 16)); + } else { + self.alpha = parseInt(c, 16) / 255; + } + }); + } else { + this.rgb = []; + rgb.split('').map((c, i) => { + if (i < 3) { + self.rgb.push(parseInt(c + c, 16)); + } else { + self.alpha = parseInt(c + c, 16) / 255; + } + }); + } + + this.alpha = this.alpha || (typeof a === 'number' ? a : 1); + + if (typeof originalForm !== 'undefined') { + this.value = originalForm; + } + } + + luma() { + let r = this.rgb[0] / 255; + let g = this.rgb[1] / 255; + let b = this.rgb[2] / 255; + r = r <= 0.03928 ? r / 12.92 : Math.pow((r + 0.055) / 1.055, 2.4); + g = g <= 0.03928 ? g / 12.92 : Math.pow((g + 0.055) / 1.055, 2.4); + b = b <= 0.03928 ? b / 12.92 : Math.pow((b + 0.055) / 1.055, 2.4); + return 0.2126 * r + 0.7152 * g + 0.0722 * b; + } + + genCSS(context, output) { + output.add(this.toCSS(context)); + } + + toCSS(context, doNotCompress) { + const compress = context && context.compress && !doNotCompress; + let color; + let alpha; + let colorFunction; + let args = []; // `value` is set if this color was originally + // converted from a named color string so we need + // to respect this and try to output named color too. + + alpha = this.fround(context, this.alpha); + + if (this.value) { + if (this.value.indexOf('rgb') === 0) { + if (alpha < 1) { + colorFunction = 'rgba'; + } + } else if (this.value.indexOf('hsl') === 0) { + if (alpha < 1) { + colorFunction = 'hsla'; + } else { + colorFunction = 'hsl'; + } + } else { + return this.value; + } + } else { + if (alpha < 1) { + colorFunction = 'rgba'; + } + } + + switch (colorFunction) { + case 'rgba': + args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1)); + break; + + case 'hsla': + args.push(clamp(alpha, 1)); + + case 'hsl': + color = this.toHSL(); + args = [this.fround(context, color.h), `${this.fround(context, color.s * 100)}%`, `${this.fround(context, color.l * 100)}%`].concat(args); + } + + if (colorFunction) { + // Values are capped between `0` and `255`, rounded and zero-padded. + return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`; + } + + color = this.toRGB(); + + if (compress) { + const splitcolor = color.split(''); // Convert color to short format + + if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) { + color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`; + } + } + + return color; + } // + // Operations have to be done per-channel, if not, + // channels will spill onto each other. Once we have + // our result, in the form of an integer triplet, + // we create a new Color node to hold the result. + // + + + operate(context, op, other) { + const rgb = new Array(3); + const alpha = this.alpha * (1 - other.alpha) + other.alpha; + + for (let c = 0; c < 3; c++) { + rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]); + } + + return new Color(rgb, alpha); + } + + toRGB() { + return toHex(this.rgb); + } + + toHSL() { + const r = this.rgb[0] / 255; + const g = this.rgb[1] / 255; + const b = this.rgb[2] / 255; + const a = this.alpha; + const max = Math.max(r, g, b); + const min = Math.min(r, g, b); + let h; + let s; + const l = (max + min) / 2; + const d = max - min; + + if (max === min) { + h = s = 0; + } else { + s = l > 0.5 ? d / (2 - max - min) : d / (max + min); + + switch (max) { + case r: + h = (g - b) / d + (g < b ? 6 : 0); + break; + + case g: + h = (b - r) / d + 2; + break; + + case b: + h = (r - g) / d + 4; + break; + } + + h /= 6; + } + + return { + h: h * 360, + s, + l, + a + }; + } // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript + + + toHSV() { + const r = this.rgb[0] / 255; + const g = this.rgb[1] / 255; + const b = this.rgb[2] / 255; + const a = this.alpha; + const max = Math.max(r, g, b); + const min = Math.min(r, g, b); + let h; + let s; + const v = max; + const d = max - min; + + if (max === 0) { + s = 0; + } else { + s = d / max; + } + + if (max === min) { + h = 0; + } else { + switch (max) { + case r: + h = (g - b) / d + (g < b ? 6 : 0); + break; + + case g: + h = (b - r) / d + 2; + break; + + case b: + h = (r - g) / d + 4; + break; + } + + h /= 6; + } + + return { + h: h * 360, + s, + v, + a + }; + } + + toARGB() { + return toHex([this.alpha * 255].concat(this.rgb)); + } + + compare(x) { + return x.rgb && x.rgb[0] === this.rgb[0] && x.rgb[1] === this.rgb[1] && x.rgb[2] === this.rgb[2] && x.alpha === this.alpha ? 0 : undefined; + } + +} + +Color.prototype.type = 'Color'; + +function clamp(v, max) { + return Math.min(Math.max(v, 0), max); +} + +function toHex(v) { + return `#${v.map(c => { + c = clamp(Math.round(c), 255); + return (c < 16 ? '0' : '') + c.toString(16); + }).join('')}`; +} + +Color.fromKeyword = keyword => { + let c; + const key = keyword.toLowerCase(); + + if (colors.hasOwnProperty(key)) { + c = new Color(colors[key].slice(1)); + } else if (key === 'transparent') { + c = new Color([0, 0, 0], 0); + } + + if (c) { + c.value = keyword; + return c; + } +}; + +class Paren extends Node { + constructor(node) { + this.value = node; + } + + genCSS(context, output) { + output.add('('); + this.value.genCSS(context, output); + output.add(')'); + } + + eval(context) { + return new Paren(this.value.eval(context)); + } + +} + +Paren.prototype.type = 'Paren'; + +class Combinator extends Node { + constructor(value) { + if (value === ' ') { + this.value = ' '; + this.emptyOrWhitespace = true; + } else { + this.value = value ? value.trim() : ''; + this.emptyOrWhitespace = this.value === ''; + } + } + + genCSS(context, output) { + const spaceOrEmpty = context.compress || _noSpaceCombinators[this.value] ? '' : ' '; + output.add(spaceOrEmpty + this.value + spaceOrEmpty); + } + +} + +Combinator.prototype.type = 'Combinator'; +const _noSpaceCombinators = { + '': true, + ' ': true, + '|': true +}; + +class Element extends Node { + constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) { + this.combinator = combinator instanceof Combinator ? combinator : new Combinator(combinator); + + if (typeof value === 'string') { + this.value = value.trim(); + } else if (value) { + this.value = value; + } else { + this.value = ''; + } + + this.isVariable = isVariable; + this._index = index; + this._fileInfo = currentFileInfo; + this.copyVisibilityInfo(visibilityInfo); + this.setParent(this.combinator, this); + } + + accept(visitor) { + const value = this.value; + this.combinator = visitor.visit(this.combinator); + + if (typeof value === 'object') { + this.value = visitor.visit(value); + } + } + + eval(context) { + return new Element(this.combinator, this.value.eval ? this.value.eval(context) : this.value, this.isVariable, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + + clone() { + return new Element(this.combinator, this.value, this.isVariable, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + + genCSS(context, output) { + output.add(this.toCSS(context), this.fileInfo(), this.getIndex()); + } + + toCSS(context = {}) { + let value = this.value; + const firstSelector = context.firstSelector; + + if (value instanceof Paren) { + // selector in parens should not be affected by outer selector + // flags (breaks only interpolated selectors - see #1973) + context.firstSelector = true; + } + + value = value.toCSS ? value.toCSS(context) : value; + context.firstSelector = firstSelector; + + if (value === '' && this.combinator.value.charAt(0) === '&') { + return ''; + } else { + return this.combinator.toCSS(context) + value; + } + } + +} + +Element.prototype.type = 'Element'; + +/** + * This is a centralized class of any error that could be thrown internally (mostly by the parser). + * Besides standard .message it keeps some additional data like a path to the file where the error + * occurred along with line and column numbers. + * + * @class + * @extends Error + * @type {module.LessError} + * + * @prop {string} type + * @prop {string} filename + * @prop {number} index + * @prop {number} line + * @prop {number} column + * @prop {number} callLine + * @prop {number} callExtract + * @prop {string[]} extract + * + * @param {Object} e - An error object to wrap around or just a descriptive object + * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager? + * @param {string} [currentFilename] + */ + +const LessError = function LessError(e, fileContentMap, currentFilename) { + Error.call(this); + const filename = e.filename || currentFilename; + this.message = e.message; + this.stack = e.stack; + + if (fileContentMap && filename) { + const input = fileContentMap.contents[filename]; + const loc = getLocation(e.index, input); + const line = loc.line; + const col = loc.column; + const callLine = e.call && getLocation(e.call, input).line; + const lines = input ? input.split('\n') : ''; + this.type = e.type || 'Syntax'; + this.filename = filename; + this.index = e.index; + this.line = typeof line === 'number' ? line + 1 : null; + this.column = col; + + if (!this.line && this.stack) { + const found = this.stack.match(/(|Function):(\d+):(\d+)/); + + if (found) { + if (found[2]) { + this.line = parseInt(found[2]) - 2; + } + + if (found[3]) { + this.column = parseInt(found[3]); + } + } + } + + this.callLine = callLine + 1; + this.callExtract = lines[callLine]; + this.extract = [lines[this.line - 2], lines[this.line - 1], lines[this.line]]; + } +}; + +if (typeof Object.create === 'undefined') { + const F = () => {}; + + F.prototype = Error.prototype; + LessError.prototype = new F(); +} else { + LessError.prototype = Object.create(Error.prototype); +} + +LessError.prototype.constructor = LessError; +/** + * An overridden version of the default Object.prototype.toString + * which uses additional information to create a helpful message. + * + * @param {Object} options + * @returns {string} + */ + +LessError.prototype.toString = function (options = {}) { + let message = ''; + const extract = this.extract || []; + let error = []; + + let stylize = str => str; + + if (options.stylize) { + const type = typeof options.stylize; + + if (type !== 'function') { + throw Error(`options.stylize should be a function, got a ${type}!`); + } + + stylize = options.stylize; + } + + if (this.line !== null) { + if (typeof extract[0] === 'string') { + error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey')); + } + + if (typeof extract[1] === 'string') { + let errorTxt = `${this.line} `; + + if (extract[1]) { + errorTxt += extract[1].slice(0, this.column) + stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') + extract[1].slice(this.column + 1), 'red'), 'inverse'); + } + + error.push(errorTxt); + } + + if (typeof extract[2] === 'string') { + error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey')); + } + + error = `${error.join('\n') + stylize('', 'reset')}\n`; + } + + message += stylize(`${this.type}Error: ${this.message}`, 'red'); + + if (this.filename) { + message += stylize(' in ', 'red') + this.filename; + } + + if (this.line) { + message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey'); + } + + message += `\n${error}`; + + if (this.callLine) { + message += `${stylize('from ', 'red') + (this.filename || '')}/n`; + message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`; + } + + return message; +}; + +class Selector extends Node { + constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) { + this.extendList = extendList; + this.condition = condition; + this.evaldCondition = !condition; + this._index = index; + this._fileInfo = currentFileInfo; + this.elements = this.getElements(elements); + this.mixinElements_ = undefined; + this.copyVisibilityInfo(visibilityInfo); + this.setParent(this.elements, this); + } + + accept(visitor) { + if (this.elements) { + this.elements = visitor.visitArray(this.elements); + } + + if (this.extendList) { + this.extendList = visitor.visitArray(this.extendList); + } + + if (this.condition) { + this.condition = visitor.visit(this.condition); + } + } + + createDerived(elements, extendList, evaldCondition) { + elements = this.getElements(elements); + const newSelector = new Selector(elements, extendList || this.extendList, null, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + newSelector.evaldCondition = evaldCondition != null ? evaldCondition : this.evaldCondition; + newSelector.mediaEmpty = this.mediaEmpty; + return newSelector; + } + + getElements(els) { + if (!els) { + return [new Element('', '&', false, this._index, this._fileInfo)]; + } + + if (typeof els === 'string') { + this.parse.parseNode(els, ['selector'], this._index, this._fileInfo, function (err, result) { + if (err) { + throw new LessError({ + index: err.index, + message: err.message + }, this.parse.imports, this._fileInfo.filename); + } + + els = result[0].elements; + }); + } + + return els; + } + + createEmptySelectors() { + const el = new Element('', '&', false, this._index, this._fileInfo); + const sels = [new Selector([el], null, null, this._index, this._fileInfo)]; + sels[0].mediaEmpty = true; + return sels; + } + + match(other) { + const elements = this.elements; + const len = elements.length; + let olen; + let i; + other = other.mixinElements(); + olen = other.length; + + if (olen === 0 || len < olen) { + return 0; + } else { + for (i = 0; i < olen; i++) { + if (elements[i].value !== other[i]) { + return 0; + } + } + } + + return olen; // return number of matched elements + } + + mixinElements() { + if (this.mixinElements_) { + return this.mixinElements_; + } + + let elements = this.elements.map(v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\*\.\w-]([\w-]|(\\.))*/g); + + if (elements) { + if (elements[0] === '&') { + elements.shift(); + } + } else { + elements = []; + } + + return this.mixinElements_ = elements; + } + + isJustParentSelector() { + return !this.mediaEmpty && this.elements.length === 1 && this.elements[0].value === '&' && (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === ''); + } + + eval(context) { + const evaldCondition = this.condition && this.condition.eval(context); + let elements = this.elements; + let extendList = this.extendList; + elements = elements && elements.map(e => e.eval(context)); + extendList = extendList && extendList.map(extend => extend.eval(context)); + return this.createDerived(elements, extendList, evaldCondition); + } + + genCSS(context, output) { + let i; + let element; + + if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') { + output.add(' ', this.fileInfo(), this.getIndex()); + } + + for (i = 0; i < this.elements.length; i++) { + element = this.elements[i]; + element.genCSS(context, output); + } + } + + getIsOutput() { + return this.evaldCondition; + } + +} + +Selector.prototype.type = 'Selector'; + +class Value extends Node { + constructor(value) { + if (!value) { + throw new Error('Value requires an array argument'); + } + + if (!Array.isArray(value)) { + this.value = [value]; + } else { + this.value = value; + } + } + + accept(visitor) { + if (this.value) { + this.value = visitor.visitArray(this.value); + } + } + + eval(context) { + if (this.value.length === 1) { + return this.value[0].eval(context); + } else { + return new Value(this.value.map(v => v.eval(context))); + } + } + + genCSS(context, output) { + let i; + + for (i = 0; i < this.value.length; i++) { + this.value[i].genCSS(context, output); + + if (i + 1 < this.value.length) { + output.add(context && context.compress ? ',' : ', '); + } + } + } + +} + +Value.prototype.type = 'Value'; + +class Keyword extends Node { + constructor(value) { + this.value = value; + } + + genCSS(context, output) { + if (this.value === '%') { + throw { + type: 'Syntax', + message: 'Invalid % without number' + }; + } + + output.add(this.value); + } + +} + +Keyword.prototype.type = 'Keyword'; +Keyword.True = new Keyword('true'); +Keyword.False = new Keyword('false'); + +class Anonymous extends Node { + constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) { + this.value = value; + this._index = index; + this._fileInfo = currentFileInfo; + this.mapLines = mapLines; + this.rulesetLike = typeof rulesetLike === 'undefined' ? false : rulesetLike; + this.allowRoot = true; + this.copyVisibilityInfo(visibilityInfo); + } + + eval() { + return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo()); + } + + compare(other) { + return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; + } + + isRulesetLike() { + return this.rulesetLike; + } + + genCSS(context, output) { + this.nodeVisible = Boolean(this.value); + + if (this.nodeVisible) { + output.add(this.value, this._fileInfo, this._index, this.mapLines); + } + } + +} + +Anonymous.prototype.type = 'Anonymous'; + +const MATH = Math$1; + +class Declaration extends Node { + constructor(name, value, important, merge, index, currentFileInfo, inline, variable) { + this.name = name; + this.value = value instanceof Node ? value : new Value([value ? new Anonymous(value) : null]); + this.important = important ? ` ${important.trim()}` : ''; + this.merge = merge; + this._index = index; + this._fileInfo = currentFileInfo; + this.inline = inline || false; + this.variable = variable !== undefined ? variable : name.charAt && name.charAt(0) === '@'; + this.allowRoot = true; + this.setParent(this.value, this); + } + + genCSS(context, output) { + output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex()); + + try { + this.value.genCSS(context, output); + } catch (e) { + e.index = this._index; + e.filename = this._fileInfo.filename; + throw e; + } + + output.add(this.important + (this.inline || context.lastRule && context.compress ? '' : ';'), this._fileInfo, this._index); + } + + eval(context) { + let mathBypass = false; + let prevMath; + let name = this.name; + let evaldValue; + let variable = this.variable; + + if (typeof name !== 'string') { + // expand 'primitive' name directly to get + // things faster (~10% for benchmark.less): + name = name.length === 1 && name[0] instanceof Keyword ? name[0].value : evalName(context, name); + variable = false; // never treat expanded interpolation as new variable name + } // @todo remove when parens-division is default + + + if (name === 'font' && context.math === MATH.ALWAYS) { + mathBypass = true; + prevMath = context.math; + context.math = MATH.PARENS_DIVISION; + } + + try { + context.importantScope.push({}); + evaldValue = this.value.eval(context); + + if (!this.variable && evaldValue.type === 'DetachedRuleset') { + throw { + message: 'Rulesets cannot be evaluated on a property.', + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } + + let important = this.important; + const importantResult = context.importantScope.pop(); + + if (!important && importantResult.important) { + important = importantResult.important; + } + + return new Declaration(name, evaldValue, important, this.merge, this.getIndex(), this.fileInfo(), this.inline, variable); + } catch (e) { + if (typeof e.index !== 'number') { + e.index = this.getIndex(); + e.filename = this.fileInfo().filename; + } + + throw e; + } finally { + if (mathBypass) { + context.math = prevMath; + } + } + } + + makeImportant() { + return new Declaration(this.name, this.value, '!important', this.merge, this.getIndex(), this.fileInfo(), this.inline); + } + +} + +function evalName(context, name) { + let value = ''; + let i; + const n = name.length; + const output = { + add: function add(s) { + value += s; + } + }; + + for (i = 0; i < n; i++) { + name[i].eval(context).genCSS(context, output); + } + + return value; +} + +Declaration.prototype.type = 'Declaration'; + +const debugInfo = (context, ctx, lineSeparator) => { + let result = ''; + + if (context.dumpLineNumbers && !context.compress) { + switch (context.dumpLineNumbers) { + case 'comments': + result = debugInfo.asComment(ctx); + break; + + case 'mediaquery': + result = debugInfo.asMediaQuery(ctx); + break; + + case 'all': + result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx); + break; + } + } + + return result; +}; + +debugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\n`; + +debugInfo.asMediaQuery = ctx => { + let filenameWithProtocol = ctx.debugInfo.fileName; + + if (!/^[a-z]+:\/\//i.test(filenameWithProtocol)) { + filenameWithProtocol = `file://${filenameWithProtocol}`; + } + + return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\/\\])/g, a => { + if (a == '\\') { + a = '\/'; + } + + return `\\${a}`; + })}}line{font-family:\\00003${ctx.debugInfo.lineNumber}}}\n`; +}; + +class Comment extends Node { + constructor(value, isLineComment, index, currentFileInfo) { + this.value = value; + this.isLineComment = isLineComment; + this._index = index; + this._fileInfo = currentFileInfo; + this.allowRoot = true; + } + + genCSS(context, output) { + if (this.debugInfo) { + output.add(debugInfo(context, this), this.fileInfo(), this.getIndex()); + } + + output.add(this.value); + } + + isSilent(context) { + const isCompressed = context.compress && this.value[2] !== '!'; + return this.isLineComment || isCompressed; + } + +} + +Comment.prototype.type = 'Comment'; + +const contexts = {}; + +const copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) { + if (!original) { + return; + } + + for (let i = 0; i < propertiesToCopy.length; i++) { + if (original.hasOwnProperty(propertiesToCopy[i])) { + destination[propertiesToCopy[i]] = original[propertiesToCopy[i]]; + } + } +}; +/* + parse is used whilst parsing + */ + + +const parseCopyProperties = [// options +'paths', // option - unmodified - paths to search for imports on +'rewriteUrls', // option - whether to adjust URL's to be relative +'rootpath', // option - rootpath to append to URL's +'strictImports', // option - +'insecure', // option - whether to allow imports from insecure ssl hosts +'dumpLineNumbers', // option - whether to dump line numbers +'compress', // option - whether to compress +'syncImport', // option - whether to import synchronously +'chunkInput', // option - whether to chunk input. more performant but causes parse issues. +'mime', // browser only - mime type for sheet import +'useFileCache', // browser only - whether to use the per file session cache +// context +'processImports', // option & context - whether to process imports. if false then imports will not be imported. +// Used by the import manager to stop multiple import visitors being created. +'pluginManager' // Used as the plugin manager for the session +]; + +contexts.Parse = function (options) { + copyFromOriginal(options, this, parseCopyProperties); + + if (typeof this.paths === 'string') { + this.paths = [this.paths]; + } +}; + +const evalCopyProperties = ['paths', // additional include paths +'compress', // whether to compress +'ieCompat', // whether to enforce IE compatibility (IE8 data-uri) +'math', // whether math has to be within parenthesis +'strictUnits', // whether units need to evaluate correctly +'sourceMap', // whether to output a source map +'importMultiple', // whether we are currently importing multiple copies +'urlArgs', // whether to add args into url tokens +'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false +'pluginManager', // Used as the plugin manager for the session +'importantScope', // used to bubble up !important statements +'rewriteUrls' // option - whether to adjust URL's to be relative +]; + +contexts.Eval = function (options, frames) { + copyFromOriginal(options, this, evalCopyProperties); + + if (typeof this.paths === 'string') { + this.paths = [this.paths]; + } + + this.frames = frames || []; + this.importantScope = this.importantScope || []; +}; + +contexts.Eval.prototype.enterCalc = function () { + if (!this.calcStack) { + this.calcStack = []; + } + + this.calcStack.push(true); + this.inCalc = true; +}; + +contexts.Eval.prototype.exitCalc = function () { + this.calcStack.pop(); + + if (!this.calcStack) { + this.inCalc = false; + } +}; + +contexts.Eval.prototype.inParenthesis = function () { + if (!this.parensStack) { + this.parensStack = []; + } + + this.parensStack.push(true); +}; + +contexts.Eval.prototype.outOfParenthesis = function () { + this.parensStack.pop(); +}; + +contexts.Eval.prototype.inCalc = false; +contexts.Eval.prototype.mathOn = true; + +contexts.Eval.prototype.isMathOn = function (op) { + if (!this.mathOn) { + return false; + } + + if (op === '/' && this.math !== Math$1.ALWAYS && (!this.parensStack || !this.parensStack.length)) { + return false; + } + + if (this.math > Math$1.PARENS_DIVISION) { + return this.parensStack && this.parensStack.length; + } + + return true; +}; + +contexts.Eval.prototype.pathRequiresRewrite = function (path) { + const isRelative = this.rewriteUrls === RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; + return isRelative(path); +}; + +contexts.Eval.prototype.rewritePath = function (path, rootpath) { + let newPath; + rootpath = rootpath || ''; + newPath = this.normalizePath(rootpath + path); // If a path was explicit relative and the rootpath was not an absolute path + // we must ensure that the new path is also explicit relative. + + if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { + newPath = `./${newPath}`; + } + + return newPath; +}; + +contexts.Eval.prototype.normalizePath = path => { + const segments = path.split('/').reverse(); + let segment; + path = []; + + while (segments.length !== 0) { + segment = segments.pop(); + + switch (segment) { + case '.': + break; + + case '..': + if (path.length === 0 || path[path.length - 1] === '..') { + path.push(segment); + } else { + path.pop(); + } + + break; + + default: + path.push(segment); + break; + } + } + + return path.join('/'); +}; + +function isPathRelative(path) { + return !/^(?:[a-z-]+:|\/|#)/i.test(path); +} + +function isPathLocalRelative(path) { + return path.charAt(0) === '.'; +} // todo - do the same for the toCSS ? + +function makeRegistry(base) { + return { + _data: {}, + add: function add(name, func) { + // precautionary case conversion, as later querying of + // the registry by function-caller uses lower case as well. + name = name.toLowerCase(); + + if (this._data.hasOwnProperty(name)) ; + + this._data[name] = func; + }, + addMultiple: function addMultiple(functions) { + Object.keys(functions).forEach(name => { + this.add(name, functions[name]); + }); + }, + get: function get(name) { + return this._data[name] || base && base.get(name); + }, + getLocalFunctions: function getLocalFunctions() { + return this._data; + }, + inherit: function inherit() { + return makeRegistry(this); + }, + create: function create(base) { + return makeRegistry(base); + } + }; +} + +var functionRegistry = makeRegistry(null); + +const defaultFunc = { + eval: function _eval() { + const v = this.value_; + const e = this.error_; + + if (e) { + throw e; + } + + if (v != null) { + return v ? Keyword.True : Keyword.False; + } + }, + value: function value(v) { + this.value_ = v; + }, + error: function error(e) { + this.error_ = e; + }, + reset: function reset() { + this.value_ = this.error_ = null; + } +}; +var defaultFunc$1 = { + 'default': defaultFunc.eval.bind(defaultFunc) +}; + +class Ruleset extends Node { + constructor(selectors, rules, strictImports, visibilityInfo) { + this.selectors = selectors; + this.rules = rules; + this._lookups = {}; + this._variables = null; + this._properties = null; + this.strictImports = strictImports; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + this.setParent(this.selectors, this); + this.setParent(this.rules, this); + } + + isRulesetLike() { + return true; + } + + accept(visitor) { + if (this.paths) { + this.paths = visitor.visitArray(this.paths, true); + } else if (this.selectors) { + this.selectors = visitor.visitArray(this.selectors); + } + + if (this.rules && this.rules.length) { + this.rules = visitor.visitArray(this.rules); + } + } + + eval(context) { + let selectors; + let selCnt; + let selector; + let i; + let hasVariable; + let hasOnePassingSelector = false; + + if (this.selectors && (selCnt = this.selectors.length)) { + selectors = new Array(selCnt); + defaultFunc$1.error({ + type: 'Syntax', + message: 'it is currently only allowed in parametric mixin guards,' + }); + + for (i = 0; i < selCnt; i++) { + selector = this.selectors[i].eval(context); + + for (var j = 0; j < selector.elements.length; j++) { + if (selector.elements[j].isVariable) { + hasVariable = true; + break; + } + } + + selectors[i] = selector; + + if (selector.evaldCondition) { + hasOnePassingSelector = true; + } + } + + if (hasVariable) { + const toParseSelectors = new Array(selCnt); + + for (i = 0; i < selCnt; i++) { + selector = selectors[i]; + toParseSelectors[i] = selector.toCSS(context); + } + + this.parse.parseNode(toParseSelectors.join(','), ["selectors"], selectors[0].getIndex(), selectors[0].fileInfo(), (err, result) => { + if (result) { + selectors = flattenArray(result); + } + }); + } + + defaultFunc$1.reset(); + } else { + hasOnePassingSelector = true; + } + + let rules = this.rules ? copyArray(this.rules) : null; + const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo()); + let rule; + let subRule; + ruleset.originalRuleset = this; + ruleset.root = this.root; + ruleset.firstRoot = this.firstRoot; + ruleset.allowImports = this.allowImports; + + if (this.debugInfo) { + ruleset.debugInfo = this.debugInfo; + } + + if (!hasOnePassingSelector) { + rules.length = 0; + } // inherit a function registry from the frames stack when possible; + // otherwise from the global registry + + + ruleset.functionRegistry = (frames => { + let i = 0; + const n = frames.length; + let found; + + for (; i !== n; ++i) { + found = frames[i].functionRegistry; + + if (found) { + return found; + } + } + + return functionRegistry; + })(context.frames).inherit(); // push the current ruleset to the frames stack + + + const ctxFrames = context.frames; + ctxFrames.unshift(ruleset); // currrent selectors + + let ctxSelectors = context.selectors; + + if (!ctxSelectors) { + context.selectors = ctxSelectors = []; + } + + ctxSelectors.unshift(this.selectors); // Evaluate imports + + if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) { + ruleset.evalImports(context); + } // Store the frames around mixin definitions, + // so they can be evaluated like closures when the time comes. + + + const rsRules = ruleset.rules; + + for (i = 0; rule = rsRules[i]; i++) { + if (rule.evalFirst) { + rsRules[i] = rule.eval(context); + } + } + + const mediaBlockCount = context.mediaBlocks && context.mediaBlocks.length || 0; // Evaluate mixin calls. + + for (i = 0; rule = rsRules[i]; i++) { + if (rule.type === 'MixinCall') { + /* jshint loopfunc:true */ + rules = rule.eval(context).filter(r => { + if (r instanceof Declaration && r.variable) { + // do not pollute the scope if the variable is + // already there. consider returning false here + // but we need a way to "return" variable from mixins + return !ruleset.variable(r.name); + } + + return true; + }); + rsRules.splice(...[i, 1].concat(rules)); + i += rules.length - 1; + ruleset.resetCache(); + } else if (rule.type === 'VariableCall') { + /* jshint loopfunc:true */ + rules = rule.eval(context).rules.filter(r => { + if (r instanceof Declaration && r.variable) { + // do not pollute the scope at all + return false; + } + + return true; + }); + rsRules.splice(...[i, 1].concat(rules)); + i += rules.length - 1; + ruleset.resetCache(); + } + } // Evaluate everything else + + + for (i = 0; rule = rsRules[i]; i++) { + if (!rule.evalFirst) { + rsRules[i] = rule = rule.eval ? rule.eval(context) : rule; + } + } // Evaluate everything else + + + for (i = 0; rule = rsRules[i]; i++) { + // for rulesets, check if it is a css guard and can be removed + if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) { + // check if it can be folded in (e.g. & where) + if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) { + rsRules.splice(i--, 1); + + for (var j = 0; subRule = rule.rules[j]; j++) { + if (subRule instanceof Node) { + subRule.copyVisibilityInfo(rule.visibilityInfo()); + + if (!(subRule instanceof Declaration) || !subRule.variable) { + rsRules.splice(++i, 0, subRule); + } + } + } + } + } + } // Pop the stack + + + ctxFrames.shift(); + ctxSelectors.shift(); + + if (context.mediaBlocks) { + for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) { + context.mediaBlocks[i].bubbleSelectors(selectors); + } + } + + return ruleset; + } + + evalImports(context) { + const rules = this.rules; + let i; + let importRules; + + if (!rules) { + return; + } + + for (i = 0; i < rules.length; i++) { + if (rules[i].type === 'Import') { + importRules = rules[i].eval(context); + + if (importRules && (importRules.length || importRules.length === 0)) { + rules.splice(...[i, 1].concat(importRules)); + i += importRules.length - 1; + } else { + rules.splice(i, 1, importRules); + } + + this.resetCache(); + } + } + } + + makeImportant() { + const result = new Ruleset(this.selectors, this.rules.map(r => { + if (r.makeImportant) { + return r.makeImportant(); + } else { + return r; + } + }), this.strictImports, this.visibilityInfo()); + return result; + } + + matchArgs(args) { + return !args || args.length === 0; + } // lets you call a css selector with a guard + + + matchCondition(args, context) { + const lastSelector = this.selectors[this.selectors.length - 1]; + + if (!lastSelector.evaldCondition) { + return false; + } + + if (lastSelector.condition && !lastSelector.condition.eval(new contexts.Eval(context, context.frames))) { + return false; + } + + return true; + } + + resetCache() { + this._rulesets = null; + this._variables = null; + this._properties = null; + this._lookups = {}; + } + + variables() { + if (!this._variables) { + this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => { + if (r instanceof Declaration && r.variable === true) { + hash[r.name] = r; + } // when evaluating variables in an import statement, imports have not been eval'd + // so we need to go inside import statements. + // guard against root being a string (in the case of inlined less) + + + if (r.type === 'Import' && r.root && r.root.variables) { + const vars = r.root.variables(); + + for (const name in vars) { + if (vars.hasOwnProperty(name)) { + hash[name] = r.root.variable(name); + } + } + } + + return hash; + }, {}); + } + + return this._variables; + } + + properties() { + if (!this._properties) { + this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => { + if (r instanceof Declaration && r.variable !== true) { + const name = r.name.length === 1 && r.name[0] instanceof Keyword ? r.name[0].value : r.name; // Properties don't overwrite as they can merge + + if (!hash[`$${name}`]) { + hash[`$${name}`] = [r]; + } else { + hash[`$${name}`].push(r); + } + } + + return hash; + }, {}); + } + + return this._properties; + } + + variable(name) { + const decl = this.variables()[name]; + + if (decl) { + return this.parseValue(decl); + } + } + + property(name) { + const decl = this.properties()[name]; + + if (decl) { + return this.parseValue(decl); + } + } + + lastDeclaration() { + for (let i = this.rules.length; i > 0; i--) { + const decl = this.rules[i - 1]; + + if (decl instanceof Declaration) { + return this.parseValue(decl); + } + } + } + + parseValue(toParse) { + const self = this; + + function transformDeclaration(decl) { + if (decl.value instanceof Anonymous && !decl.parsed) { + if (typeof decl.value.value === 'string') { + this.parse.parseNode(decl.value.value, ['value', 'important'], decl.value.getIndex(), decl.fileInfo(), (err, result) => { + if (err) { + decl.parsed = true; + } + + if (result) { + decl.value = result[0]; + decl.important = result[1] || ''; + decl.parsed = true; + } + }); + } else { + decl.parsed = true; + } + + return decl; + } else { + return decl; + } + } + + if (!Array.isArray(toParse)) { + return transformDeclaration.call(self, toParse); + } else { + const nodes = []; + toParse.forEach(n => { + nodes.push(transformDeclaration.call(self, n)); + }); + return nodes; + } + } + + rulesets() { + if (!this.rules) { + return []; + } + + const filtRules = []; + const rules = this.rules; + let i; + let rule; + + for (i = 0; rule = rules[i]; i++) { + if (rule.isRuleset) { + filtRules.push(rule); + } + } + + return filtRules; + } + + prependRule(rule) { + const rules = this.rules; + + if (rules) { + rules.unshift(rule); + } else { + this.rules = [rule]; + } + + this.setParent(rule, this); + } + + find(selector, self = this, filter) { + const rules = []; + let match; + let foundMixins; + const key = selector.toCSS(); + + if (key in this._lookups) { + return this._lookups[key]; + } + + this.rulesets().forEach(rule => { + if (rule !== self) { + for (let j = 0; j < rule.selectors.length; j++) { + match = selector.match(rule.selectors[j]); + + if (match) { + if (selector.elements.length > match) { + if (!filter || filter(rule)) { + foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter); + + for (let i = 0; i < foundMixins.length; ++i) { + foundMixins[i].path.push(rule); + } + + Array.prototype.push.apply(rules, foundMixins); + } + } else { + rules.push({ + rule, + path: [] + }); + } + + break; + } + } + } + }); + this._lookups[key] = rules; + return rules; + } + + genCSS(context, output) { + let i; + let j; + const charsetRuleNodes = []; + let ruleNodes = []; + let // Line number debugging + debugInfo$1; + let rule; + let path; + context.tabLevel = context.tabLevel || 0; + + if (!this.root) { + context.tabLevel++; + } + + const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' '); + const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' '); + let sep; + let charsetNodeIndex = 0; + let importNodeIndex = 0; + + for (i = 0; rule = this.rules[i]; i++) { + if (rule instanceof Comment) { + if (importNodeIndex === i) { + importNodeIndex++; + } + + ruleNodes.push(rule); + } else if (rule.isCharset && rule.isCharset()) { + ruleNodes.splice(charsetNodeIndex, 0, rule); + charsetNodeIndex++; + importNodeIndex++; + } else if (rule.type === 'Import') { + ruleNodes.splice(importNodeIndex, 0, rule); + importNodeIndex++; + } else { + ruleNodes.push(rule); + } + } + + ruleNodes = charsetRuleNodes.concat(ruleNodes); // If this is the root node, we don't render + // a selector, or {}. + + if (!this.root) { + debugInfo$1 = debugInfo(context, this, tabSetStr); + + if (debugInfo$1) { + output.add(debugInfo$1); + output.add(tabSetStr); + } + + const paths = this.paths; + const pathCnt = paths.length; + let pathSubCnt; + sep = context.compress ? ',' : `,\n${tabSetStr}`; + + for (i = 0; i < pathCnt; i++) { + path = paths[i]; + + if (!(pathSubCnt = path.length)) { + continue; + } + + if (i > 0) { + output.add(sep); + } + + context.firstSelector = true; + path[0].genCSS(context, output); + context.firstSelector = false; + + for (j = 1; j < pathSubCnt; j++) { + path[j].genCSS(context, output); + } + } + + output.add((context.compress ? '{' : ' {\n') + tabRuleStr); + } // Compile rules and rulesets + + + for (i = 0; rule = ruleNodes[i]; i++) { + if (i + 1 === ruleNodes.length) { + context.lastRule = true; + } + + const currentLastRule = context.lastRule; + + if (rule.isRulesetLike(rule)) { + context.lastRule = false; + } + + if (rule.genCSS) { + rule.genCSS(context, output); + } else if (rule.value) { + output.add(rule.value.toString()); + } + + context.lastRule = currentLastRule; + + if (!context.lastRule && rule.isVisible()) { + output.add(context.compress ? '' : `\n${tabRuleStr}`); + } else { + context.lastRule = false; + } + } + + if (!this.root) { + output.add(context.compress ? '}' : `\n${tabSetStr}}`); + context.tabLevel--; + } + + if (!output.isEmpty() && !context.compress && this.firstRoot) { + output.add('\n'); + } + } + + joinSelectors(paths, context, selectors) { + for (let s = 0; s < selectors.length; s++) { + this.joinSelector(paths, context, selectors[s]); + } + } + + joinSelector(paths, context, selector) { + function createParenthesis(elementsToPak, originalElement) { + let replacementParen; + let j; + + if (elementsToPak.length === 0) { + replacementParen = new Paren(elementsToPak[0]); + } else { + const insideParent = new Array(elementsToPak.length); + + for (j = 0; j < elementsToPak.length; j++) { + insideParent[j] = new Element(null, elementsToPak[j], originalElement.isVariable, originalElement._index, originalElement._fileInfo); + } + + replacementParen = new Paren(new Selector(insideParent)); + } + + return replacementParen; + } + + function createSelector(containedElement, originalElement) { + let element; + let selector; + element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo); + selector = new Selector([element]); + return selector; + } // joins selector path from `beginningPath` with selector path in `addPath` + // `replacedElement` contains element that is being replaced by `addPath` + // returns concatenated path + + + function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) { + let newSelectorPath; + let lastSelector; + let newJoinedSelector; // our new selector path + + newSelectorPath = []; // construct the joined selector - if & is the first thing this will be empty, + // if not newJoinedSelector will be the last set of elements in the selector + + if (beginningPath.length > 0) { + newSelectorPath = copyArray(beginningPath); + lastSelector = newSelectorPath.pop(); + newJoinedSelector = originalSelector.createDerived(copyArray(lastSelector.elements)); + } else { + newJoinedSelector = originalSelector.createDerived([]); + } + + if (addPath.length > 0) { + // /deep/ is a CSS4 selector - (removed, so should deprecate) + // that is valid without anything in front of it + // so if the & does not have a combinator that is "" or " " then + // and there is a combinator on the parent, then grab that. + // this also allows + a { & .b { .a & { ... though not sure why you would want to do that + let combinator = replacedElement.combinator; + const parentEl = addPath[0].elements[0]; + + if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) { + combinator = parentEl.combinator; + } // join the elements so far with the first part of the parent + + + newJoinedSelector.elements.push(new Element(combinator, parentEl.value, replacedElement.isVariable, replacedElement._index, replacedElement._fileInfo)); + newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1)); + } // now add the joined selector - but only if it is not empty + + + if (newJoinedSelector.elements.length !== 0) { + newSelectorPath.push(newJoinedSelector); + } // put together the parent selectors after the join (e.g. the rest of the parent) + + + if (addPath.length > 1) { + let restOfPath = addPath.slice(1); + restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, [])); + newSelectorPath = newSelectorPath.concat(restOfPath); + } + + return newSelectorPath; + } // joins selector path from `beginningPath` with every selector path in `addPaths` array + // `replacedElement` contains element that is being replaced by `addPath` + // returns array with all concatenated paths + + + function addAllReplacementsIntoPath(beginningPath, addPaths, replacedElement, originalSelector, result) { + let j; + + for (j = 0; j < beginningPath.length; j++) { + const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector); + result.push(newSelectorPath); + } + + return result; + } + + function mergeElementsOnToSelectors(elements, selectors) { + let i; + let sel; + + if (elements.length === 0) { + return; + } + + if (selectors.length === 0) { + selectors.push([new Selector(elements)]); + return; + } + + for (i = 0; sel = selectors[i]; i++) { + // if the previous thing in sel is a parent this needs to join on to it + if (sel.length > 0) { + sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements)); + } else { + sel.push(new Selector(elements)); + } + } + } // replace all parent selectors inside `inSelector` by content of `context` array + // resulting selectors are returned inside `paths` array + // returns true if `inSelector` contained at least one parent selector + + + function replaceParentSelector(paths, context, inSelector) { + // The paths are [[Selector]] + // The first list is a list of comma separated selectors + // The inner list is a list of inheritance separated selectors + // e.g. + // .a, .b { + // .c { + // } + // } + // == [[.a] [.c]] [[.b] [.c]] + // + let i; + let j; + let k; + let currentElements; + let newSelectors; + let selectorsMultiplied; + let sel; + let el; + let hadParentSelector = false; + let length; + let lastSelector; + + function findNestedSelector(element) { + let maybeSelector; + + if (!(element.value instanceof Paren)) { + return null; + } + + maybeSelector = element.value.value; + + if (!(maybeSelector instanceof Selector)) { + return null; + } + + return maybeSelector; + } // the elements from the current selector so far + + + currentElements = []; // the current list of new selectors to add to the path. + // We will build it up. We initiate it with one empty selector as we "multiply" the new selectors + // by the parents + + newSelectors = [[]]; + + for (i = 0; el = inSelector.elements[i]; i++) { + // non parent reference elements just get added + if (el.value !== '&') { + const nestedSelector = findNestedSelector(el); + + if (nestedSelector != null) { + // merge the current list of non parent selector elements + // on to the current list of selectors to add + mergeElementsOnToSelectors(currentElements, newSelectors); + const nestedPaths = []; + let replaced; + const replacedNewSelectors = []; + replaced = replaceParentSelector(nestedPaths, context, nestedSelector); + hadParentSelector = hadParentSelector || replaced; // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors + + for (k = 0; k < nestedPaths.length; k++) { + const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el); + addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors); + } + + newSelectors = replacedNewSelectors; + currentElements = []; + } else { + currentElements.push(el); + } + } else { + hadParentSelector = true; // the new list of selectors to add + + selectorsMultiplied = []; // merge the current list of non parent selector elements + // on to the current list of selectors to add + + mergeElementsOnToSelectors(currentElements, newSelectors); // loop through our current selectors + + for (j = 0; j < newSelectors.length; j++) { + sel = newSelectors[j]; // if we don't have any parent paths, the & might be in a mixin so that it can be used + // whether there are parents or not + + if (context.length === 0) { + // the combinator used on el should now be applied to the next element instead so that + // it is not lost + if (sel.length > 0) { + sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo)); + } + + selectorsMultiplied.push(sel); + } else { + // and the parent selectors + for (k = 0; k < context.length; k++) { + // We need to put the current selectors + // then join the last selector's elements on to the parents selectors + const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector); // add that to our new set of selectors + + selectorsMultiplied.push(newSelectorPath); + } + } + } // our new selectors has been multiplied, so reset the state + + + newSelectors = selectorsMultiplied; + currentElements = []; + } + } // if we have any elements left over (e.g. .a& .b == .b) + // add them on to all the current selectors + + + mergeElementsOnToSelectors(currentElements, newSelectors); + + for (i = 0; i < newSelectors.length; i++) { + length = newSelectors[i].length; + + if (length > 0) { + paths.push(newSelectors[i]); + lastSelector = newSelectors[i][length - 1]; + newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList); + } + } + + return hadParentSelector; + } + + function deriveSelector(visibilityInfo, deriveFrom) { + const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition); + newSelector.copyVisibilityInfo(visibilityInfo); + return newSelector; + } // joinSelector code follows + + + let i; + let newPaths; + let hadParentSelector; + newPaths = []; + hadParentSelector = replaceParentSelector(newPaths, context, selector); + + if (!hadParentSelector) { + if (context.length > 0) { + newPaths = []; + + for (i = 0; i < context.length; i++) { + const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo())); + concatenated.push(selector); + newPaths.push(concatenated); + } + } else { + newPaths = [[selector]]; + } + } + + for (i = 0; i < newPaths.length; i++) { + paths.push(newPaths[i]); + } + } + +} + +Ruleset.prototype.type = 'Ruleset'; +Ruleset.prototype.isRuleset = true; + +class AtRule extends Node { + constructor(name, value, rules, index, currentFileInfo, debugInfo, isRooted, visibilityInfo) { + let i; + this.name = name; + this.value = value instanceof Node ? value : value ? new Anonymous(value) : value; + + if (rules) { + if (Array.isArray(rules)) { + this.rules = rules; + } else { + this.rules = [rules]; + this.rules[0].selectors = new Selector([], null, null, index, currentFileInfo).createEmptySelectors(); + } + + for (i = 0; i < this.rules.length; i++) { + this.rules[i].allowImports = true; + } + + this.setParent(this.rules, this); + } + + this._index = index; + this._fileInfo = currentFileInfo; + this.debugInfo = debugInfo; + this.isRooted = isRooted || false; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + } + + accept(visitor) { + const value = this.value; + const rules = this.rules; + + if (rules) { + this.rules = visitor.visitArray(rules); + } + + if (value) { + this.value = visitor.visit(value); + } + } + + isRulesetLike() { + return this.rules || !this.isCharset(); + } + + isCharset() { + return '@charset' === this.name; + } + + genCSS(context, output) { + const value = this.value; + const rules = this.rules; + output.add(this.name, this.fileInfo(), this.getIndex()); + + if (value) { + output.add(' '); + value.genCSS(context, output); + } + + if (rules) { + this.outputRuleset(context, output, rules); + } else { + output.add(';'); + } + } + + eval(context) { + let mediaPathBackup; + let mediaBlocksBackup; + let value = this.value; + let rules = this.rules; // media stored inside other atrule should not bubble over it + // backpup media bubbling information + + mediaPathBackup = context.mediaPath; + mediaBlocksBackup = context.mediaBlocks; // deleted media bubbling information + + context.mediaPath = []; + context.mediaBlocks = []; + + if (value) { + value = value.eval(context); + } + + if (rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + rules = [rules[0].eval(context)]; + rules[0].root = true; + } // restore media bubbling information + + + context.mediaPath = mediaPathBackup; + context.mediaBlocks = mediaBlocksBackup; + return new AtRule(this.name, value, rules, this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo()); + } + + variable(name) { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.variable.call(this.rules[0], name); + } + } + + find(...args) { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.find.apply(this.rules[0], args); + } + } + + rulesets() { + if (this.rules) { + // assuming that there is only one rule at this point - that is how parser constructs the rule + return Ruleset.prototype.rulesets.apply(this.rules[0]); + } + } + + outputRuleset(context, output, rules) { + const ruleCnt = rules.length; + let i; + context.tabLevel = (context.tabLevel | 0) + 1; // Compressed + + if (context.compress) { + output.add('{'); + + for (i = 0; i < ruleCnt; i++) { + rules[i].genCSS(context, output); + } + + output.add('}'); + context.tabLevel--; + return; + } // Non-compressed + + + const tabSetStr = `\n${Array(context.tabLevel).join(' ')}`; + const tabRuleStr = `${tabSetStr} `; + + if (!ruleCnt) { + output.add(` {${tabSetStr}}`); + } else { + output.add(` {${tabRuleStr}`); + rules[0].genCSS(context, output); + + for (i = 1; i < ruleCnt; i++) { + output.add(tabRuleStr); + rules[i].genCSS(context, output); + } + + output.add(`${tabSetStr}}`); + } + + context.tabLevel--; + } + +} + +AtRule.prototype.type = 'AtRule'; + +class DetachedRuleset extends Node { + constructor(ruleset, frames) { + this.ruleset = ruleset; + this.frames = frames; + this.setParent(this.ruleset, this); + } + + accept(visitor) { + this.ruleset = visitor.visit(this.ruleset); + } + + eval(context) { + const frames = this.frames || copyArray(context.frames); + return new DetachedRuleset(this.ruleset, frames); + } + + callEval(context) { + return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context); + } + +} + +DetachedRuleset.prototype.type = 'DetachedRuleset'; +DetachedRuleset.prototype.evalFirst = true; + +class Unit extends Node { + constructor(numerator, denominator, backupUnit) { + this.numerator = numerator ? copyArray(numerator).sort() : []; + this.denominator = denominator ? copyArray(denominator).sort() : []; + + if (backupUnit) { + this.backupUnit = backupUnit; + } else if (numerator && numerator.length) { + this.backupUnit = numerator[0]; + } + } + + clone() { + return new Unit(copyArray(this.numerator), copyArray(this.denominator), this.backupUnit); + } + + genCSS(context, output) { + // Dimension checks the unit is singular and throws an error if in strict math mode. + const strictUnits = context && context.strictUnits; + + if (this.numerator.length === 1) { + output.add(this.numerator[0]); // the ideal situation + } else if (!strictUnits && this.backupUnit) { + output.add(this.backupUnit); + } else if (!strictUnits && this.denominator.length) { + output.add(this.denominator[0]); + } + } + + toString() { + let i; + let returnStr = this.numerator.join('*'); + + for (i = 0; i < this.denominator.length; i++) { + returnStr += `/${this.denominator[i]}`; + } + + return returnStr; + } + + compare(other) { + return this.is(other.toString()) ? 0 : undefined; + } + + is(unitString) { + return this.toString().toUpperCase() === unitString.toUpperCase(); + } + + isLength() { + return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS()); + } + + isEmpty() { + return this.numerator.length === 0 && this.denominator.length === 0; + } + + isSingular() { + return this.numerator.length <= 1 && this.denominator.length === 0; + } + + map(callback) { + let i; + + for (i = 0; i < this.numerator.length; i++) { + this.numerator[i] = callback(this.numerator[i], false); + } + + for (i = 0; i < this.denominator.length; i++) { + this.denominator[i] = callback(this.denominator[i], true); + } + } + + usedUnits() { + let group; + const result = {}; + let mapUnit; + let groupName; + + mapUnit = atomicUnit => { + /* jshint loopfunc:true */ + if (group.hasOwnProperty(atomicUnit) && !result[groupName]) { + result[groupName] = atomicUnit; + } + + return atomicUnit; + }; + + for (groupName in unitConversions) { + if (unitConversions.hasOwnProperty(groupName)) { + group = unitConversions[groupName]; + this.map(mapUnit); + } + } + + return result; + } + + cancel() { + const counter = {}; + let atomicUnit; + let i; + + for (i = 0; i < this.numerator.length; i++) { + atomicUnit = this.numerator[i]; + counter[atomicUnit] = (counter[atomicUnit] || 0) + 1; + } + + for (i = 0; i < this.denominator.length; i++) { + atomicUnit = this.denominator[i]; + counter[atomicUnit] = (counter[atomicUnit] || 0) - 1; + } + + this.numerator = []; + this.denominator = []; + + for (atomicUnit in counter) { + if (counter.hasOwnProperty(atomicUnit)) { + const count = counter[atomicUnit]; + + if (count > 0) { + for (i = 0; i < count; i++) { + this.numerator.push(atomicUnit); + } + } else if (count < 0) { + for (i = 0; i < -count; i++) { + this.denominator.push(atomicUnit); + } + } + } + } + + this.numerator.sort(); + this.denominator.sort(); + } + +} + +Unit.prototype.type = 'Unit'; + +// A number with a unit +// + +class Dimension extends Node { + constructor(value, unit) { + this.value = parseFloat(value); + + if (isNaN(this.value)) { + throw new Error('Dimension is not a number.'); + } + + this.unit = unit && unit instanceof Unit ? unit : new Unit(unit ? [unit] : undefined); + this.setParent(this.unit, this); + } + + accept(visitor) { + this.unit = visitor.visit(this.unit); + } + + eval(context) { + return this; + } + + toColor() { + return new Color([this.value, this.value, this.value]); + } + + genCSS(context, output) { + if (context && context.strictUnits && !this.unit.isSingular()) { + throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`); + } + + const value = this.fround(context, this.value); + let strValue = String(value); + + if (value !== 0 && value < 0.000001 && value > -0.000001) { + // would be output 1e-6 etc. + strValue = value.toFixed(20).replace(/0+$/, ''); + } + + if (context && context.compress) { + // Zero values doesn't need a unit + if (value === 0 && this.unit.isLength()) { + output.add(strValue); + return; + } // Float values doesn't need a leading zero + + + if (value > 0 && value < 1) { + strValue = strValue.substr(1); + } + } + + output.add(strValue); + this.unit.genCSS(context, output); + } // In an operation between two Dimensions, + // we default to the first Dimension's unit, + // so `1px + 2` will yield `3px`. + + + operate(context, op, other) { + /* jshint noempty:false */ + let value = this._operate(context, op, this.value, other.value); + + let unit = this.unit.clone(); + + if (op === '+' || op === '-') { + if (unit.numerator.length === 0 && unit.denominator.length === 0) { + unit = other.unit.clone(); + + if (this.unit.backupUnit) { + unit.backupUnit = this.unit.backupUnit; + } + } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) ; else { + other = other.convertTo(this.unit.usedUnits()); + + if (context.strictUnits && other.unit.toString() !== unit.toString()) { + throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`); + } + + value = this._operate(context, op, this.value, other.value); + } + } else if (op === '*') { + unit.numerator = unit.numerator.concat(other.unit.numerator).sort(); + unit.denominator = unit.denominator.concat(other.unit.denominator).sort(); + unit.cancel(); + } else if (op === '/') { + unit.numerator = unit.numerator.concat(other.unit.denominator).sort(); + unit.denominator = unit.denominator.concat(other.unit.numerator).sort(); + unit.cancel(); + } + + return new Dimension(value, unit); + } + + compare(other) { + let a; + let b; + + if (!(other instanceof Dimension)) { + return undefined; + } + + if (this.unit.isEmpty() || other.unit.isEmpty()) { + a = this; + b = other; + } else { + a = this.unify(); + b = other.unify(); + + if (a.unit.compare(b.unit) !== 0) { + return undefined; + } + } + + return Node.numericCompare(a.value, b.value); + } + + unify() { + return this.convertTo({ + length: 'px', + duration: 's', + angle: 'rad' + }); + } + + convertTo(conversions) { + let value = this.value; + const unit = this.unit.clone(); + let i; + let groupName; + let group; + let targetUnit; + let derivedConversions = {}; + let applyUnit; + + if (typeof conversions === 'string') { + for (i in unitConversions) { + if (unitConversions[i].hasOwnProperty(conversions)) { + derivedConversions = {}; + derivedConversions[i] = conversions; + } + } + + conversions = derivedConversions; + } + + applyUnit = (atomicUnit, denominator) => { + /* jshint loopfunc:true */ + if (group.hasOwnProperty(atomicUnit)) { + if (denominator) { + value = value / (group[atomicUnit] / group[targetUnit]); + } else { + value = value * (group[atomicUnit] / group[targetUnit]); + } + + return targetUnit; + } + + return atomicUnit; + }; + + for (groupName in conversions) { + if (conversions.hasOwnProperty(groupName)) { + targetUnit = conversions[groupName]; + group = unitConversions[groupName]; + unit.map(applyUnit); + } + } + + unit.cancel(); + return new Dimension(value, unit); + } + +} + +Dimension.prototype.type = 'Dimension'; + +const MATH$1 = Math$1; + +class Operation extends Node { + constructor(op, operands, isSpaced) { + this.op = op.trim(); + this.operands = operands; + this.isSpaced = isSpaced; + } + + accept(visitor) { + this.operands = visitor.visitArray(this.operands); + } + + eval(context) { + let a = this.operands[0].eval(context); + let b = this.operands[1].eval(context); + let op; + + if (context.isMathOn(this.op)) { + op = this.op === './' ? '/' : this.op; + + if (a instanceof Dimension && b instanceof Color) { + a = a.toColor(); + } + + if (b instanceof Dimension && a instanceof Color) { + b = b.toColor(); + } + + if (!a.operate) { + if (a instanceof Operation && a.op === '/' && context.math === MATH$1.PARENS_DIVISION) { + return new Operation(this.op, [a, b], this.isSpaced); + } + + throw { + type: 'Operation', + message: 'Operation on an invalid type' + }; + } + + return a.operate(context, op, b); + } else { + return new Operation(this.op, [a, b], this.isSpaced); + } + } + + genCSS(context, output) { + this.operands[0].genCSS(context, output); + + if (this.isSpaced) { + output.add(' '); + } + + output.add(this.op); + + if (this.isSpaced) { + output.add(' '); + } + + this.operands[1].genCSS(context, output); + } + +} + +Operation.prototype.type = 'Operation'; + +const MATH$2 = Math$1; + +class Expression extends Node { + constructor(value, noSpacing) { + this.value = value; + this.noSpacing = noSpacing; + + if (!value) { + throw new Error('Expression requires an array parameter'); + } + } + + accept(visitor) { + this.value = visitor.visitArray(this.value); + } + + eval(context) { + let returnValue; + const mathOn = context.isMathOn(); + const inParenthesis = this.parens && (context.math !== MATH$2.STRICT_LEGACY || !this.parensInOp); + let doubleParen = false; + + if (inParenthesis) { + context.inParenthesis(); + } + + if (this.value.length > 1) { + returnValue = new Expression(this.value.map(e => { + if (!e.eval) { + return e; + } + + return e.eval(context); + }), this.noSpacing); + } else if (this.value.length === 1) { + if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) { + doubleParen = true; + } + + returnValue = this.value[0].eval(context); + } else { + returnValue = this; + } + + if (inParenthesis) { + context.outOfParenthesis(); + } + + if (this.parens && this.parensInOp && !mathOn && !doubleParen && !(returnValue instanceof Dimension)) { + returnValue = new Paren(returnValue); + } + + return returnValue; + } + + genCSS(context, output) { + for (let i = 0; i < this.value.length; i++) { + this.value[i].genCSS(context, output); + + if (!this.noSpacing && i + 1 < this.value.length) { + output.add(' '); + } + } + } + + throwAwayComments() { + this.value = this.value.filter(v => !(v instanceof Comment)); + } + +} + +Expression.prototype.type = 'Expression'; + +class functionCaller { + constructor(name, context, index, currentFileInfo) { + this.name = name.toLowerCase(); + this.index = index; + this.context = context; + this.currentFileInfo = currentFileInfo; + this.func = context.frames[0].functionRegistry.get(this.name); + } + + isValid() { + return Boolean(this.func); + } + + call(args) { + // This code is terrible and should be replaced as per this issue... + // https://github.com/less/less.js/issues/2477 + if (Array.isArray(args)) { + args = args.filter(item => { + if (item.type === 'Comment') { + return false; + } + + return true; + }).map(item => { + if (item.type === 'Expression') { + const subNodes = item.value.filter(item => { + if (item.type === 'Comment') { + return false; + } + + return true; + }); + + if (subNodes.length === 1) { + return subNodes[0]; + } else { + return new Expression(subNodes); + } + } + + return item; + }); + } + + return this.func(...args); + } + +} + +// A function call node. +// + +class Call extends Node { + constructor(name, args, index, currentFileInfo) { + this.name = name; + this.args = args; + this.calc = name === 'calc'; + this._index = index; + this._fileInfo = currentFileInfo; + } + + accept(visitor) { + if (this.args) { + this.args = visitor.visitArray(this.args); + } + } // + // When evaluating a function call, + // we either find the function in the functionRegistry, + // in which case we call it, passing the evaluated arguments, + // if this returns null or we cannot find the function, we + // simply print it out as it appeared originally [2]. + // + // The reason why we evaluate the arguments, is in the case where + // we try to pass a variable to a function, like: `saturate(@color)`. + // The function should receive the value, not the variable. + // + + + eval(context) { + /** + * Turn off math for calc(), and switch back on for evaluating nested functions + */ + const currentMathContext = context.mathOn; + context.mathOn = !this.calc; + + if (this.calc || context.inCalc) { + context.enterCalc(); + } + + const args = this.args.map(a => a.eval(context)); + + if (this.calc || context.inCalc) { + context.exitCalc(); + } + + context.mathOn = currentMathContext; + let result; + const funcCaller = new functionCaller(this.name, context, this.getIndex(), this.fileInfo()); + + if (funcCaller.isValid()) { + try { + result = funcCaller.call(args); + } catch (e) { + throw { + type: e.type || 'Runtime', + message: `error evaluating function \`${this.name}\`${e.message ? `: ${e.message}` : ''}`, + index: this.getIndex(), + filename: this.fileInfo().filename, + line: e.lineNumber, + column: e.columnNumber + }; + } + + if (result !== null && result !== undefined) { + // Results that that are not nodes are cast as Anonymous nodes + // Falsy values or booleans are returned as empty nodes + if (!(result instanceof Node)) { + if (!result || result === true) { + result = new Anonymous(null); + } else { + result = new Anonymous(result.toString()); + } + } + + result._index = this._index; + result._fileInfo = this._fileInfo; + return result; + } + } + + return new Call(this.name, args, this.getIndex(), this.fileInfo()); + } + + genCSS(context, output) { + output.add(`${this.name}(`, this.fileInfo(), this.getIndex()); + + for (let i = 0; i < this.args.length; i++) { + this.args[i].genCSS(context, output); + + if (i + 1 < this.args.length) { + output.add(', '); + } + } + + output.add(')'); + } + +} + +Call.prototype.type = 'Call'; + +class Variable extends Node { + constructor(name, index, currentFileInfo) { + this.name = name; + this._index = index; + this._fileInfo = currentFileInfo; + } + + eval(context) { + let variable; + let name = this.name; + + if (name.indexOf('@@') === 0) { + name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`; + } + + if (this.evaluating) { + throw { + type: 'Name', + message: `Recursive variable definition for ${name}`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + this.evaluating = true; + variable = this.find(context.frames, frame => { + const v = frame.variable(name); + + if (v) { + if (v.important) { + const importantScope = context.importantScope[context.importantScope.length - 1]; + importantScope.important = v.important; + } // If in calc, wrap vars in a function call to cascade evaluate args first + + + if (context.inCalc) { + return new Call('_SELF', [v.value]).eval(context); + } else { + return v.value.eval(context); + } + } + }); + + if (variable) { + this.evaluating = false; + return variable; + } else { + throw { + type: 'Name', + message: `variable ${name} is undefined`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + } + + find(obj, fun) { + for (let i = 0, r; i < obj.length; i++) { + r = fun.call(obj, obj[i]); + + if (r) { + return r; + } + } + + return null; + } + +} + +Variable.prototype.type = 'Variable'; + +class Property extends Node { + constructor(name, index, currentFileInfo) { + this.name = name; + this._index = index; + this._fileInfo = currentFileInfo; + } + + eval(context) { + let property; + const name = this.name; // TODO: shorten this reference + + const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules; + + if (this.evaluating) { + throw { + type: 'Name', + message: `Recursive property reference for ${name}`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + this.evaluating = true; + property = this.find(context.frames, frame => { + let v; + const vArr = frame.property(name); + + if (vArr) { + for (let i = 0; i < vArr.length; i++) { + v = vArr[i]; + vArr[i] = new Declaration(v.name, v.value, v.important, v.merge, v.index, v.currentFileInfo, v.inline, v.variable); + } + + mergeRules(vArr); + v = vArr[vArr.length - 1]; + + if (v.important) { + const importantScope = context.importantScope[context.importantScope.length - 1]; + importantScope.important = v.important; + } + + v = v.value.eval(context); + return v; + } + }); + + if (property) { + this.evaluating = false; + return property; + } else { + throw { + type: 'Name', + message: `Property '${name}' is undefined`, + filename: this.currentFileInfo.filename, + index: this.index + }; + } + } + + find(obj, fun) { + for (let i = 0, r; i < obj.length; i++) { + r = fun.call(obj, obj[i]); + + if (r) { + return r; + } + } + + return null; + } + +} + +Property.prototype.type = 'Property'; + +class Attribute extends Node { + constructor(key, op, value) { + this.key = key; + this.op = op; + this.value = value; + } + + eval(context) { + return new Attribute(this.key.eval ? this.key.eval(context) : this.key, this.op, this.value && this.value.eval ? this.value.eval(context) : this.value); + } + + genCSS(context, output) { + output.add(this.toCSS(context)); + } + + toCSS(context) { + let value = this.key.toCSS ? this.key.toCSS(context) : this.key; + + if (this.op) { + value += this.op; + value += this.value.toCSS ? this.value.toCSS(context) : this.value; + } + + return `[${value}]`; + } + +} + +Attribute.prototype.type = 'Attribute'; + +class Quoted extends Node { + constructor(str, content, escaped, index, currentFileInfo) { + this.escaped = escaped == null ? true : escaped; + this.value = content || ''; + this.quote = str.charAt(0); + this._index = index; + this._fileInfo = currentFileInfo; + this.variableRegex = /@\{([\w-]+)\}/g; + this.propRegex = /\$\{([\w-]+)\}/g; + } + + genCSS(context, output) { + if (!this.escaped) { + output.add(this.quote, this.fileInfo(), this.getIndex()); + } + + output.add(this.value); + + if (!this.escaped) { + output.add(this.quote); + } + } + + containsVariables() { + return this.value.match(this.variableRegex); + } + + eval(context) { + const that = this; + let value = this.value; + + const variableReplacement = (_, name) => { + const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true); + return v instanceof Quoted ? v.value : v.toCSS(); + }; + + const propertyReplacement = (_, name) => { + const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true); + return v instanceof Quoted ? v.value : v.toCSS(); + }; + + function iterativeReplace(value, regexp, replacementFnc) { + let evaluatedValue = value; + + do { + value = evaluatedValue.toString(); + evaluatedValue = value.replace(regexp, replacementFnc); + } while (value !== evaluatedValue); + + return evaluatedValue; + } + + value = iterativeReplace(value, this.variableRegex, variableReplacement); + value = iterativeReplace(value, this.propRegex, propertyReplacement); + return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo()); + } + + compare(other) { + // when comparing quoted strings allow the quote to differ + if (other.type === 'Quoted' && !this.escaped && !other.escaped) { + return Node.numericCompare(this.value, other.value); + } else { + return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined; + } + } + +} + +Quoted.prototype.type = 'Quoted'; + +class URL extends Node { + constructor(val, index, currentFileInfo, isEvald) { + this.value = val; + this._index = index; + this._fileInfo = currentFileInfo; + this.isEvald = isEvald; + } + + accept(visitor) { + this.value = visitor.visit(this.value); + } + + genCSS(context, output) { + output.add('url('); + this.value.genCSS(context, output); + output.add(')'); + } + + eval(context) { + const val = this.value.eval(context); + let rootpath; + + if (!this.isEvald) { + // Add the rootpath if the URL requires a rewrite + rootpath = this.fileInfo() && this.fileInfo().rootpath; + + if (typeof rootpath === 'string' && typeof val.value === 'string' && context.pathRequiresRewrite(val.value)) { + if (!val.quote) { + rootpath = escapePath(rootpath); + } + + val.value = context.rewritePath(val.value, rootpath); + } else { + val.value = context.normalizePath(val.value); + } // Add url args if enabled + + + if (context.urlArgs) { + if (!val.value.match(/^\s*data:/)) { + const delimiter = val.value.indexOf('?') === -1 ? '?' : '&'; + const urlArgs = delimiter + context.urlArgs; + + if (val.value.indexOf('#') !== -1) { + val.value = val.value.replace('#', `${urlArgs}#`); + } else { + val.value += urlArgs; + } + } + } + } + + return new URL(val, this.getIndex(), this.fileInfo(), true); + } + +} + +URL.prototype.type = 'Url'; + +function escapePath(path) { + return path.replace(/[\(\)'"\s]/g, match => `\\${match}`); +} + +class Media extends AtRule { + constructor(value, features, index, currentFileInfo, visibilityInfo) { + this._index = index; + this._fileInfo = currentFileInfo; + const selectors = new Selector([], null, null, this._index, this._fileInfo).createEmptySelectors(); + this.features = new Value(features); + this.rules = [new Ruleset(selectors, value)]; + this.rules[0].allowImports = true; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + this.setParent(selectors, this); + this.setParent(this.features, this); + this.setParent(this.rules, this); + } + + isRulesetLike() { + return true; + } + + accept(visitor) { + if (this.features) { + this.features = visitor.visit(this.features); + } + + if (this.rules) { + this.rules = visitor.visitArray(this.rules); + } + } + + genCSS(context, output) { + output.add('@media ', this._fileInfo, this._index); + this.features.genCSS(context, output); + this.outputRuleset(context, output, this.rules); + } + + eval(context) { + if (!context.mediaBlocks) { + context.mediaBlocks = []; + context.mediaPath = []; + } + + const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo()); + + if (this.debugInfo) { + this.rules[0].debugInfo = this.debugInfo; + media.debugInfo = this.debugInfo; + } + + media.features = this.features.eval(context); + context.mediaPath.push(media); + context.mediaBlocks.push(media); + this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit(); + context.frames.unshift(this.rules[0]); + media.rules = [this.rules[0].eval(context)]; + context.frames.shift(); + context.mediaPath.pop(); + return context.mediaPath.length === 0 ? media.evalTop(context) : media.evalNested(context); + } + + evalTop(context) { + let result = this; // Render all dependent Media blocks. + + if (context.mediaBlocks.length > 1) { + const selectors = new Selector([], null, null, this.getIndex(), this.fileInfo()).createEmptySelectors(); + result = new Ruleset(selectors, context.mediaBlocks); + result.multiMedia = true; + result.copyVisibilityInfo(this.visibilityInfo()); + this.setParent(result, this); + } + + delete context.mediaBlocks; + delete context.mediaPath; + return result; + } + + evalNested(context) { + let i; + let value; + const path = context.mediaPath.concat([this]); // Extract the media-query conditions separated with `,` (OR). + + for (i = 0; i < path.length; i++) { + value = path[i].features instanceof Value ? path[i].features.value : path[i].features; + path[i] = Array.isArray(value) ? value : [value]; + } // Trace all permutations to generate the resulting media-query. + // + // (a, b and c) with nested (d, e) -> + // a and d + // a and e + // b and c and d + // b and c and e + + + this.features = new Value(this.permute(path).map(path => { + path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment)); + + for (i = path.length - 1; i > 0; i--) { + path.splice(i, 0, new Anonymous('and')); + } + + return new Expression(path); + })); + this.setParent(this.features, this); // Fake a tree-node that doesn't output anything. + + return new Ruleset([], []); + } + + permute(arr) { + if (arr.length === 0) { + return []; + } else if (arr.length === 1) { + return arr[0]; + } else { + const result = []; + const rest = this.permute(arr.slice(1)); + + for (let i = 0; i < rest.length; i++) { + for (let j = 0; j < arr[0].length; j++) { + result.push([arr[0][j]].concat(rest[i])); + } + } + + return result; + } + } + + bubbleSelectors(selectors) { + if (!selectors) { + return; + } + + this.rules = [new Ruleset(copyArray(selectors), [this.rules[0]])]; + this.setParent(this.rules, this); + } + +} + +Media.prototype.type = 'Media'; + +// CSS @import node +// +// The general strategy here is that we don't want to wait +// for the parsing to be completed, before we start importing +// the file. That's because in the context of a browser, +// most of the time will be spent waiting for the server to respond. +// +// On creation, we push the import path to our import queue, though +// `import,push`, we also pass it a callback, which it'll call once +// the file has been fetched, and parsed. +// + +class Import extends Node { + constructor(path, features, options, index, currentFileInfo, visibilityInfo) { + this.options = options; + this._index = index; + this._fileInfo = currentFileInfo; + this.path = path; + this.features = features; + this.allowRoot = true; + + if (this.options.less !== undefined || this.options.inline) { + this.css = !this.options.less || this.options.inline; + } else { + const pathValue = this.getPath(); + + if (pathValue && /[#\.\&\?]css([\?;].*)?$/.test(pathValue)) { + this.css = true; + } + } + + this.copyVisibilityInfo(visibilityInfo); + this.setParent(this.features, this); + this.setParent(this.path, this); + } + + accept(visitor) { + if (this.features) { + this.features = visitor.visit(this.features); + } + + this.path = visitor.visit(this.path); + + if (!this.options.isPlugin && !this.options.inline && this.root) { + this.root = visitor.visit(this.root); + } + } + + genCSS(context, output) { + if (this.css && this.path._fileInfo.reference === undefined) { + output.add('@import ', this._fileInfo, this._index); + this.path.genCSS(context, output); + + if (this.features) { + output.add(' '); + this.features.genCSS(context, output); + } + + output.add(';'); + } + } + + getPath() { + return this.path instanceof URL ? this.path.value.value : this.path.value; + } + + isVariableImport() { + let path = this.path; + + if (path instanceof URL) { + path = path.value; + } + + if (path instanceof Quoted) { + return path.containsVariables(); + } + + return true; + } + + evalForImport(context) { + let path = this.path; + + if (path instanceof URL) { + path = path.value; + } + + return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo()); + } + + evalPath(context) { + const path = this.path.eval(context); + const fileInfo = this._fileInfo; + + if (!(path instanceof URL)) { + // Add the rootpath if the URL requires a rewrite + const pathValue = path.value; + + if (fileInfo && pathValue && context.pathRequiresRewrite(pathValue)) { + path.value = context.rewritePath(pathValue, fileInfo.rootpath); + } else { + path.value = context.normalizePath(path.value); + } + } + + return path; + } + + eval(context) { + const result = this.doEval(context); + + if (this.options.reference || this.blocksVisibility()) { + if (result.length || result.length === 0) { + result.forEach(node => { + node.addVisibilityBlock(); + }); + } else { + result.addVisibilityBlock(); + } + } + + return result; + } + + doEval(context) { + let ruleset; + let registry; + const features = this.features && this.features.eval(context); + + if (this.options.isPlugin) { + if (this.root && this.root.eval) { + try { + this.root.eval(context); + } catch (e) { + e.message = 'Plugin error during evaluation'; + throw new LessError(e, this.root.imports, this.root.filename); + } + } + + registry = context.frames[0] && context.frames[0].functionRegistry; + + if (registry && this.root && this.root.functions) { + registry.addMultiple(this.root.functions); + } + + return []; + } + + if (this.skip) { + if (typeof this.skip === 'function') { + this.skip = this.skip(); + } + + if (this.skip) { + return []; + } + } + + if (this.options.inline) { + const contents = new Anonymous(this.root, 0, { + filename: this.importedFilename, + reference: this.path._fileInfo && this.path._fileInfo.reference + }, true, true); + return this.features ? new Media([contents], this.features.value) : [contents]; + } else if (this.css) { + const newImport = new Import(this.evalPath(context), features, this.options, this._index); + + if (!newImport.css && this.error) { + throw this.error; + } + + return newImport; + } else { + ruleset = new Ruleset(null, copyArray(this.root.rules)); + ruleset.evalImports(context); + return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules; + } + } + +} + +Import.prototype.type = 'Import'; + +const JsEvalNode = () => {}; + +JsEvalNode.prototype = new Node(); + +JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { + let result; + const that = this; + const evalContext = {}; + + if (!context.javascriptEnabled) { + throw { + message: 'Inline JavaScript is not enabled. Is it set in your options?', + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + expression = expression.replace(/@\{([\w-]+)\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context))); + + try { + expression = new Function(`return (${expression})`); + } catch (e) { + throw { + message: `JavaScript evaluation error: ${e.message} from \`${expression}\``, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + const variables = context.frames[0].variables(); + + for (const k in variables) { + if (variables.hasOwnProperty(k)) { + /* jshint loopfunc:true */ + evalContext[k.slice(1)] = { + value: variables[k].value, + toJS: function toJS() { + return this.value.eval(context).toCSS(); + } + }; + } + } + + try { + result = expression.call(evalContext); + } catch (e) { + throw { + message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/["]/g, '\'')}'`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + return result; +}; + +JsEvalNode.prototype.jsify = obj => { + if (Array.isArray(obj.value) && obj.value.length > 1) { + return `[${obj.value.map(v => v.toCSS()).join(', ')}]`; + } else { + return obj.toCSS(); + } +}; + +class JavaScript extends JsEvalNode { + constructor(string, escaped, index, currentFileInfo) { + this.escaped = escaped; + this.expression = string; + this._index = index; + this._fileInfo = currentFileInfo; + } + + eval(context) { + const result = this.evaluateJavaScript(this.expression, context); + const type = typeof result; + + if (type === 'number' && !isNaN(result)) { + return new Dimension(result); + } else if (type === 'string') { + return new Quoted(`"${result}"`, result, this.escaped, this._index); + } else if (Array.isArray(result)) { + return new Anonymous(result.join(', ')); + } else { + return new Anonymous(result); + } + } + +} + +JavaScript.prototype.type = 'JavaScript'; + +class Assignment extends Node { + constructor(key, val) { + this.key = key; + this.value = val; + } + + accept(visitor) { + this.value = visitor.visit(this.value); + } + + eval(context) { + if (this.value.eval) { + return new Assignment(this.key, this.value.eval(context)); + } + + return this; + } + + genCSS(context, output) { + output.add(`${this.key}=`); + + if (this.value.genCSS) { + this.value.genCSS(context, output); + } else { + output.add(this.value); + } + } + +} + +Assignment.prototype.type = 'Assignment'; + +class Condition extends Node { + constructor(op, l, r, i, negate) { + this.op = op.trim(); + this.lvalue = l; + this.rvalue = r; + this._index = i; + this.negate = negate; + } + + accept(visitor) { + this.lvalue = visitor.visit(this.lvalue); + this.rvalue = visitor.visit(this.rvalue); + } + + eval(context) { + const result = ((op, a, b) => { + switch (op) { + case 'and': + return a && b; + + case 'or': + return a || b; + + default: + switch (Node.compare(a, b)) { + case -1: + return op === '<' || op === '=<' || op === '<='; + + case 0: + return op === '=' || op === '>=' || op === '=<' || op === '<='; + + case 1: + return op === '>' || op === '>='; + + default: + return false; + } + + } + })(this.op, this.lvalue.eval(context), this.rvalue.eval(context)); + + return this.negate ? !result : result; + } + +} + +Condition.prototype.type = 'Condition'; + +class UnicodeDescriptor extends Node { + constructor(value) { + this.value = value; + } + +} + +UnicodeDescriptor.prototype.type = 'UnicodeDescriptor'; + +class Negative extends Node { + constructor(node) { + this.value = node; + } + + genCSS(context, output) { + output.add('-'); + this.value.genCSS(context, output); + } + + eval(context) { + if (context.isMathOn()) { + return new Operation('*', [new Dimension(-1), this.value]).eval(context); + } + + return new Negative(this.value.eval(context)); + } + +} + +Negative.prototype.type = 'Negative'; + +class Extend extends Node { + constructor(selector, option, index, currentFileInfo, visibilityInfo) { + this.selector = selector; + this.option = option; + this.object_id = Extend.next_id++; + this.parent_ids = [this.object_id]; + this._index = index; + this._fileInfo = currentFileInfo; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + + switch (option) { + case 'all': + this.allowBefore = true; + this.allowAfter = true; + break; + + default: + this.allowBefore = false; + this.allowAfter = false; + break; + } + + this.setParent(this.selector, this); + } + + accept(visitor) { + this.selector = visitor.visit(this.selector); + } + + eval(context) { + return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } + + clone(context) { + return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo()); + } // it concatenates (joins) all selectors in selector array + + + findSelfSelectors(selectors) { + let selfElements = []; + let i; + let selectorElements; + + for (i = 0; i < selectors.length; i++) { + selectorElements = selectors[i].elements; // duplicate the logic in genCSS function inside the selector node. + // future TODO - move both logics into the selector joiner visitor + + if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') { + selectorElements[0].combinator.value = ' '; + } + + selfElements = selfElements.concat(selectors[i].elements); + } + + this.selfSelectors = [new Selector(selfElements)]; + this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo()); + } + +} + +Extend.next_id = 0; +Extend.prototype.type = 'Extend'; + +class VariableCall extends Node { + constructor(variable, index, currentFileInfo) { + this.variable = variable; + this._index = index; + this._fileInfo = currentFileInfo; + this.allowRoot = true; + } + + eval(context) { + let rules; + let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context); + const error = new LessError({ + message: `Could not evaluate variable call ${this.variable}` + }); + + if (!detachedRuleset.ruleset) { + if (detachedRuleset.rules) { + rules = detachedRuleset; + } else if (Array.isArray(detachedRuleset)) { + rules = new Ruleset('', detachedRuleset); + } else if (Array.isArray(detachedRuleset.value)) { + rules = new Ruleset('', detachedRuleset.value); + } else { + throw error; + } + + detachedRuleset = new DetachedRuleset(rules); + } + + if (detachedRuleset.ruleset) { + return detachedRuleset.callEval(context); + } + + throw error; + } + +} + +VariableCall.prototype.type = 'VariableCall'; + +class NamespaceValue extends Node { + constructor(ruleCall, lookups, important, index, fileInfo) { + this.value = ruleCall; + this.lookups = lookups; + this.important = important; + this._index = index; + this._fileInfo = fileInfo; + } + + eval(context) { + let i; + let name; + let rules = this.value.eval(context); + + for (i = 0; i < this.lookups.length; i++) { + name = this.lookups[i]; + /** + * Eval'd DRs return rulesets. + * Eval'd mixins return rules, so let's make a ruleset if we need it. + * We need to do this because of late parsing of values + */ + + if (Array.isArray(rules)) { + rules = new Ruleset([new Selector()], rules); + } + + if (name === '') { + rules = rules.lastDeclaration(); + } else if (name.charAt(0) === '@') { + if (name.charAt(1) === '@') { + name = `@${new Variable(name.substr(1)).eval(context).value}`; + } + + if (rules.variables) { + rules = rules.variable(name); + } + + if (!rules) { + throw { + type: 'Name', + message: `variable ${name} not found`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + } else { + if (name.substring(0, 2) === '$@') { + name = `$${new Variable(name.substr(1)).eval(context).value}`; + } else { + name = name.charAt(0) === '$' ? name : `$${name}`; + } + + if (rules.properties) { + rules = rules.property(name); + } + + if (!rules) { + throw { + type: 'Name', + message: `property "${name.substr(1)}" not found`, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } // Properties are an array of values, since a ruleset can have multiple props. + // We pick the last one (the "cascaded" value) + + + rules = rules[rules.length - 1]; + } + + if (rules.value) { + rules = rules.eval(context).value; + } + + if (rules.ruleset) { + rules = rules.ruleset.eval(context); + } + } + + return rules; + } + +} + +NamespaceValue.prototype.type = 'NamespaceValue'; + +class Definition extends Ruleset { + constructor(name, params, rules, condition, variadic, frames, visibilityInfo) { + this.name = name || 'anonymous mixin'; + this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])]; + this.params = params; + this.condition = condition; + this.variadic = variadic; + this.arity = params.length; + this.rules = rules; + this._lookups = {}; + const optionalParameters = []; + this.required = params.reduce((count, p) => { + if (!p.name || p.name && !p.value) { + return count + 1; + } else { + optionalParameters.push(p.name); + return count; + } + }, 0); + this.optionalParameters = optionalParameters; + this.frames = frames; + this.copyVisibilityInfo(visibilityInfo); + this.allowRoot = true; + } + + accept(visitor) { + if (this.params && this.params.length) { + this.params = visitor.visitArray(this.params); + } + + this.rules = visitor.visitArray(this.rules); + + if (this.condition) { + this.condition = visitor.visit(this.condition); + } + } + + evalParams(context, mixinEnv, args, evaldArguments) { + /* jshint boss:true */ + const frame = new Ruleset(null, null); + let varargs; + let arg; + const params = copyArray(this.params); + let i; + let j; + let val; + let name; + let isNamedFound; + let argIndex; + let argsLength = 0; + + if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) { + frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit(); + } + + mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames)); + + if (args) { + args = copyArray(args); + argsLength = args.length; + + for (i = 0; i < argsLength; i++) { + arg = args[i]; + + if (name = arg && arg.name) { + isNamedFound = false; + + for (j = 0; j < params.length; j++) { + if (!evaldArguments[j] && name === params[j].name) { + evaldArguments[j] = arg.value.eval(context); + frame.prependRule(new Declaration(name, arg.value.eval(context))); + isNamedFound = true; + break; + } + } + + if (isNamedFound) { + args.splice(i, 1); + i--; + continue; + } else { + throw { + type: 'Runtime', + message: `Named argument for ${this.name} ${args[i].name} not found` + }; + } + } + } + } + + argIndex = 0; + + for (i = 0; i < params.length; i++) { + if (evaldArguments[i]) { + continue; + } + + arg = args && args[argIndex]; + + if (name = params[i].name) { + if (params[i].variadic) { + varargs = []; + + for (j = argIndex; j < argsLength; j++) { + varargs.push(args[j].value.eval(context)); + } + + frame.prependRule(new Declaration(name, new Expression(varargs).eval(context))); + } else { + val = arg && arg.value; + + if (val) { + // This was a mixin call, pass in a detached ruleset of it's eval'd rules + if (Array.isArray(val)) { + val = new DetachedRuleset(new Ruleset('', val)); + } else { + val = val.eval(context); + } + } else if (params[i].value) { + val = params[i].value.eval(mixinEnv); + frame.resetCache(); + } else { + throw { + type: 'Runtime', + message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` + }; + } + + frame.prependRule(new Declaration(name, val)); + evaldArguments[i] = val; + } + } + + if (params[i].variadic && args) { + for (j = argIndex; j < argsLength; j++) { + evaldArguments[j] = args[j].value.eval(context); + } + } + + argIndex++; + } + + return frame; + } + + makeImportant() { + const rules = !this.rules ? this.rules : this.rules.map(r => { + if (r.makeImportant) { + return r.makeImportant(true); + } else { + return r; + } + }); + const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames); + return result; + } + + eval(context) { + return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || copyArray(context.frames)); + } + + evalCall(context, args, important) { + const _arguments = []; + const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames; + const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments); + let rules; + let ruleset; + frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context))); + rules = copyArray(this.rules); + ruleset = new Ruleset(null, rules); + ruleset.originalRuleset = this; + ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames))); + + if (important) { + ruleset = ruleset.makeImportant(); + } + + return ruleset; + } + + matchCondition(args, context) { + if (this.condition && !this.condition.eval(new contexts.Eval(context, [this.evalParams(context, + /* the parameter variables */ + new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])].concat(this.frames || []) // the parent namespace/mixin frames + .concat(context.frames)))) { + // the current environment frames + return false; + } + + return true; + } + + matchArgs(args, context) { + const allArgsCnt = args && args.length || 0; + let len; + const optionalParameters = this.optionalParameters; + const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => { + if (optionalParameters.indexOf(p.name) < 0) { + return count + 1; + } else { + return count; + } + }, 0); + + if (!this.variadic) { + if (requiredArgsCnt < this.required) { + return false; + } + + if (allArgsCnt > this.params.length) { + return false; + } + } else { + if (requiredArgsCnt < this.required - 1) { + return false; + } + } // check patterns + + + len = Math.min(requiredArgsCnt, this.arity); + + for (let i = 0; i < len; i++) { + if (!this.params[i].name && !this.params[i].variadic) { + if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) { + return false; + } + } + } + + return true; + } + +} + +Definition.prototype.type = 'MixinDefinition'; +Definition.prototype.evalFirst = true; + +class MixinCall extends Node { + constructor(elements, args, index, currentFileInfo, important) { + this.selector = new Selector(elements); + this.arguments = args || []; + this._index = index; + this._fileInfo = currentFileInfo; + this.important = important; + this.allowRoot = true; + this.setParent(this.selector, this); + } + + accept(visitor) { + if (this.selector) { + this.selector = visitor.visit(this.selector); + } + + if (this.arguments.length) { + this.arguments = visitor.visitArray(this.arguments); + } + } + + eval(context) { + let mixins; + let mixin; + let mixinPath; + const args = []; + let arg; + let argValue; + const rules = []; + let match = false; + let i; + let m; + let f; + let isRecursive; + let isOneFound; + const candidates = []; + let candidate; + const conditionResult = []; + let defaultResult; + const defFalseEitherCase = -1; + const defNone = 0; + const defTrue = 1; + const defFalse = 2; + let count; + let originalRuleset; + let noArgumentsFilter; + this.selector = this.selector.eval(context); + + function calcDefGroup(mixin, mixinPath) { + let f; + let p; + let namespace; + + for (f = 0; f < 2; f++) { + conditionResult[f] = true; + defaultFunc$1.value(f); + + for (p = 0; p < mixinPath.length && conditionResult[f]; p++) { + namespace = mixinPath[p]; + + if (namespace.matchCondition) { + conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context); + } + } + + if (mixin.matchCondition) { + conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context); + } + } + + if (conditionResult[0] || conditionResult[1]) { + if (conditionResult[0] != conditionResult[1]) { + return conditionResult[1] ? defTrue : defFalse; + } + + return defNone; + } + + return defFalseEitherCase; + } + + for (i = 0; i < this.arguments.length; i++) { + arg = this.arguments[i]; + argValue = arg.value.eval(context); + + if (arg.expand && Array.isArray(argValue.value)) { + argValue = argValue.value; + + for (m = 0; m < argValue.length; m++) { + args.push({ + value: argValue[m] + }); + } + } else { + args.push({ + name: arg.name, + value: argValue + }); + } + } + + noArgumentsFilter = rule => rule.matchArgs(null, context); + + for (i = 0; i < context.frames.length; i++) { + if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) { + isOneFound = true; // To make `default()` function independent of definition order we have two "subpasses" here. + // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`), + // and build candidate list with corresponding flags. Then, when we know all possible matches, + // we make a final decision. + + for (m = 0; m < mixins.length; m++) { + mixin = mixins[m].rule; + mixinPath = mixins[m].path; + isRecursive = false; + + for (f = 0; f < context.frames.length; f++) { + if (!(mixin instanceof Definition) && mixin === (context.frames[f].originalRuleset || context.frames[f])) { + isRecursive = true; + break; + } + } + + if (isRecursive) { + continue; + } + + if (mixin.matchArgs(args, context)) { + candidate = { + mixin, + group: calcDefGroup(mixin, mixinPath) + }; + + if (candidate.group !== defFalseEitherCase) { + candidates.push(candidate); + } + + match = true; + } + } + + defaultFunc$1.reset(); + count = [0, 0, 0]; + + for (m = 0; m < candidates.length; m++) { + count[candidates[m].group]++; + } + + if (count[defNone] > 0) { + defaultResult = defFalse; + } else { + defaultResult = defTrue; + + if (count[defTrue] + count[defFalse] > 1) { + throw { + type: 'Runtime', + message: `Ambiguous use of \`default()\` found when matching for \`${this.format(args)}\``, + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } + } + + for (m = 0; m < candidates.length; m++) { + candidate = candidates[m].group; + + if (candidate === defNone || candidate === defaultResult) { + try { + mixin = candidates[m].mixin; + + if (!(mixin instanceof Definition)) { + originalRuleset = mixin.originalRuleset || mixin; + mixin = new Definition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo()); + mixin.originalRuleset = originalRuleset; + } + + const newRules = mixin.evalCall(context, args, this.important).rules; + + this._setVisibilityToReplacement(newRules); + + Array.prototype.push.apply(rules, newRules); + } catch (e) { + throw { + message: e.message, + index: this.getIndex(), + filename: this.fileInfo().filename, + stack: e.stack + }; + } + } + } + + if (match) { + return rules; + } + } + } + + if (isOneFound) { + throw { + type: 'Runtime', + message: `No matching definition was found for \`${this.format(args)}\``, + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } else { + throw { + type: 'Name', + message: `${this.selector.toCSS().trim()} is undefined`, + index: this.getIndex(), + filename: this.fileInfo().filename + }; + } + } + + _setVisibilityToReplacement(replacement) { + let i; + let rule; + + if (this.blocksVisibility()) { + for (i = 0; i < replacement.length; i++) { + rule = replacement[i]; + rule.addVisibilityBlock(); + } + } + } + + format(args) { + return `${this.selector.toCSS().trim()}(${args ? args.map(a => { + let argValue = ''; + + if (a.name) { + argValue += `${a.name}:`; + } + + if (a.value.toCSS) { + argValue += a.value.toCSS(); + } else { + argValue += '???'; + } + + return argValue; + }).join(', ') : ''})`; + } + +} + +MixinCall.prototype.type = 'MixinCall'; + +var tree = { + Node, + Color, + AtRule, + DetachedRuleset, + Operation, + Dimension, + Unit, + Keyword, + Variable, + Property, + Ruleset, + Element, + Attribute, + Combinator, + Selector, + Quoted, + Expression, + Declaration, + Call, + URL, + Import, + Comment, + Anonymous, + Value, + JavaScript, + Assignment, + Condition, + Paren, + Media, + UnicodeDescriptor, + Negative, + Extend, + VariableCall, + NamespaceValue, + mixin: { + Call: MixinCall, + Definition: Definition + } +}; + +/** + * @todo Document why this abstraction exists, and the relationship between + * environment, file managers, and plugin manager + */ + +class environment$1 { + constructor(externalEnvironment, fileManagers) { + this.fileManagers = fileManagers || []; + externalEnvironment = externalEnvironment || {}; + const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator']; + const requiredFunctions = []; + const functions = requiredFunctions.concat(optionalFunctions); + + for (let i = 0; i < functions.length; i++) { + const propName = functions[i]; + const environmentFunc = externalEnvironment[propName]; + + if (environmentFunc) { + this[propName] = environmentFunc.bind(externalEnvironment); + } else if (i < requiredFunctions.length) { + this.warn(`missing required function in environment - ${propName}`); + } + } + } + + getFileManager(filename, currentDirectory, options, environment, isSync) { + if (!filename) { + logger.warn('getFileManager called with no filename.. Please report this issue. continuing.'); + } + + if (currentDirectory == null) { + logger.warn('getFileManager called with null directory.. Please report this issue. continuing.'); + } + + let fileManagers = this.fileManagers; + + if (options.pluginManager) { + fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers()); + } + + for (let i = fileManagers.length - 1; i >= 0; i--) { + const fileManager = fileManagers[i]; + + if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) { + return fileManager; + } + } + + return null; + } + + addFileManager(fileManager) { + this.fileManagers.push(fileManager); + } + + clearFileManagers() { + this.fileManagers = []; + } + +} + +class AbstractPluginLoader { + constructor() { + // Implemented by Node.js plugin loader + this.require = () => null; + } + + evalPlugin(contents, context, imports, pluginOptions, fileInfo) { + let loader; + let registry; + let pluginObj; + let localModule; + let pluginManager; + let filename; + let result; + pluginManager = context.pluginManager; + + if (fileInfo) { + if (typeof fileInfo === 'string') { + filename = fileInfo; + } else { + filename = fileInfo.filename; + } + } + + const shortname = new this.less.FileManager().extractUrlParts(filename).filename; + + if (filename) { + pluginObj = pluginManager.get(filename); + + if (pluginObj) { + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; + } + + try { + if (pluginObj.use) { + pluginObj.use.call(this.context, pluginObj); + } + } catch (e) { + e.message = e.message || 'Error during @plugin call'; + return new LessError(e, imports, filename); + } + + return pluginObj; + } + } + + localModule = { + exports: {}, + pluginManager, + fileInfo + }; + registry = functionRegistry.create(); + + const registerPlugin = obj => { + pluginObj = obj; + }; + + try { + loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents); + loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo); + } catch (e) { + return new LessError(e, imports, filename); + } + + if (!pluginObj) { + pluginObj = localModule.exports; + } + + pluginObj = this.validatePlugin(pluginObj, filename, shortname); + + if (pluginObj instanceof LessError) { + return pluginObj; + } + + if (pluginObj) { + pluginObj.imports = imports; + pluginObj.filename = filename; // For < 3.x (or unspecified minVersion) - setOptions() before install() + + if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) { + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; + } + } // Run on first load + + + pluginManager.addPlugin(pluginObj, fileInfo.filename, registry); + pluginObj.functions = registry.getLocalFunctions(); // Need to call setOptions again because the pluginObj might have functions + + result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions); + + if (result) { + return result; + } // Run every @plugin call + + + try { + if (pluginObj.use) { + pluginObj.use.call(this.context, pluginObj); + } + } catch (e) { + e.message = e.message || 'Error during @plugin call'; + return new LessError(e, imports, filename); + } + } else { + return new LessError({ + message: 'Not a valid plugin' + }, imports, filename); + } + + return pluginObj; + } + + trySetOptions(plugin, filename, name, options) { + if (options && !plugin.setOptions) { + return new LessError({ + message: `Options have been provided but the plugin ${name} does not support any options.` + }); + } + + try { + plugin.setOptions && plugin.setOptions(options); + } catch (e) { + return new LessError(e); + } + } + + validatePlugin(plugin, filename, name) { + if (plugin) { + // support plugins being a function + // so that the plugin can be more usable programmatically + if (typeof plugin === 'function') { + plugin = new plugin(); + } + + if (plugin.minVersion) { + if (this.compareVersion(plugin.minVersion, this.less.version) < 0) { + return new LessError({ + message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}` + }); + } + } + + return plugin; + } + + return null; + } + + compareVersion(aVersion, bVersion) { + if (typeof aVersion === 'string') { + aVersion = aVersion.match(/^(\d+)\.?(\d+)?\.?(\d+)?/); + aVersion.shift(); + } + + for (let i = 0; i < aVersion.length; i++) { + if (aVersion[i] !== bVersion[i]) { + return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1; + } + } + + return 0; + } + + versionToString(version) { + let versionString = ''; + + for (let i = 0; i < version.length; i++) { + versionString += (versionString ? '.' : '') + version[i]; + } + + return versionString; + } + + printUsage(plugins) { + for (let i = 0; i < plugins.length; i++) { + const plugin = plugins[i]; + + if (plugin.printUsage) { + plugin.printUsage(); + } + } + } + +} + +const _visitArgs = { + visitDeeper: true +}; +let _hasIndexed = false; + +function _noop(node) { + return node; +} + +function indexNodeTypes(parent, ticker) { + // add .typeIndex to tree node types for lookup table + let key; + let child; + + for (key in parent) { + /* eslint guard-for-in: 0 */ + child = parent[key]; + + switch (typeof child) { + case 'function': + // ignore bound functions directly on tree which do not have a prototype + // or aren't nodes + if (child.prototype && child.prototype.type) { + child.prototype.typeIndex = ticker++; + } + + break; + + case 'object': + ticker = indexNodeTypes(child, ticker); + break; + } + } + + return ticker; +} + +class Visitor { + constructor(implementation) { + this._implementation = implementation; + this._visitInCache = {}; + this._visitOutCache = {}; + + if (!_hasIndexed) { + indexNodeTypes(tree, 1); + _hasIndexed = true; + } + } + + visit(node) { + if (!node) { + return node; + } + + const nodeTypeIndex = node.typeIndex; + + if (!nodeTypeIndex) { + // MixinCall args aren't a node type? + if (node.value && node.value.typeIndex) { + this.visit(node.value); + } + + return node; + } + + const impl = this._implementation; + let func = this._visitInCache[nodeTypeIndex]; + let funcOut = this._visitOutCache[nodeTypeIndex]; + const visitArgs = _visitArgs; + let fnName; + visitArgs.visitDeeper = true; + + if (!func) { + fnName = `visit${node.type}`; + func = impl[fnName] || _noop; + funcOut = impl[`${fnName}Out`] || _noop; + this._visitInCache[nodeTypeIndex] = func; + this._visitOutCache[nodeTypeIndex] = funcOut; + } + + if (func !== _noop) { + const newNode = func.call(impl, node, visitArgs); + + if (node && impl.isReplacing) { + node = newNode; + } + } + + if (visitArgs.visitDeeper && node && node.accept) { + node.accept(this); + } + + if (funcOut != _noop) { + funcOut.call(impl, node); + } + + return node; + } + + visitArray(nodes, nonReplacing) { + if (!nodes) { + return nodes; + } + + const cnt = nodes.length; + let i; // Non-replacing + + if (nonReplacing || !this._implementation.isReplacing) { + for (i = 0; i < cnt; i++) { + this.visit(nodes[i]); + } + + return nodes; + } // Replacing + + + const out = []; + + for (i = 0; i < cnt; i++) { + const evald = this.visit(nodes[i]); + + if (evald === undefined) { + continue; + } + + if (!evald.splice) { + out.push(evald); + } else if (evald.length) { + this.flatten(evald, out); + } + } + + return out; + } + + flatten(arr, out) { + if (!out) { + out = []; + } + + let cnt; + let i; + let item; + let nestedCnt; + let j; + let nestedItem; + + for (i = 0, cnt = arr.length; i < cnt; i++) { + item = arr[i]; + + if (item === undefined) { + continue; + } + + if (!item.splice) { + out.push(item); + continue; + } + + for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) { + nestedItem = item[j]; + + if (nestedItem === undefined) { + continue; + } + + if (!nestedItem.splice) { + out.push(nestedItem); + } else if (nestedItem.length) { + this.flatten(nestedItem, out); + } + } + } + + return out; + } + +} + +class ImportSequencer { + constructor(onSequencerEmpty) { + this.imports = []; + this.variableImports = []; + this._onSequencerEmpty = onSequencerEmpty; + this._currentDepth = 0; + } + + addImport(callback) { + const importSequencer = this; + const importItem = { + callback, + args: null, + isReady: false + }; + this.imports.push(importItem); + return function (...args) { + importItem.args = Array.prototype.slice.call(args, 0); + importItem.isReady = true; + importSequencer.tryRun(); + }; + } + + addVariableImport(callback) { + this.variableImports.push(callback); + } + + tryRun() { + this._currentDepth++; + + try { + while (true) { + while (this.imports.length > 0) { + const importItem = this.imports[0]; + + if (!importItem.isReady) { + return; + } + + this.imports = this.imports.slice(1); + importItem.callback.apply(null, importItem.args); + } + + if (this.variableImports.length === 0) { + break; + } + + const variableImport = this.variableImports[0]; + this.variableImports = this.variableImports.slice(1); + variableImport(); + } + } finally { + this._currentDepth--; + } + + if (this._currentDepth === 0 && this._onSequencerEmpty) { + this._onSequencerEmpty(); + } + } + +} + +const ImportVisitor = function ImportVisitor(importer, finish) { + this._visitor = new Visitor(this); + this._importer = importer; + this._finish = finish; + this.context = new contexts.Eval(); + this.importCount = 0; + this.onceFileDetectionMap = {}; + this.recursionDetector = {}; + this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this)); +}; + +ImportVisitor.prototype = { + isReplacing: false, + run: function run(root) { + try { + // process the contents + this._visitor.visit(root); + } catch (e) { + this.error = e; + } + + this.isFinished = true; + + this._sequencer.tryRun(); + }, + _onSequencerEmpty: function _onSequencerEmpty() { + if (!this.isFinished) { + return; + } + + this._finish(this.error); + }, + visitImport: function visitImport(importNode, visitArgs) { + const inlineCSS = importNode.options.inline; + + if (!importNode.css || inlineCSS) { + const context = new contexts.Eval(this.context, copyArray(this.context.frames)); + const importParent = context.frames[0]; + this.importCount++; + + if (importNode.isVariableImport()) { + this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent)); + } else { + this.processImportNode(importNode, context, importParent); + } + } + + visitArgs.visitDeeper = false; + }, + processImportNode: function processImportNode(importNode, context, importParent) { + let evaldImportNode; + const inlineCSS = importNode.options.inline; + + try { + evaldImportNode = importNode.evalForImport(context); + } catch (e) { + if (!e.filename) { + e.index = importNode.getIndex(); + e.filename = importNode.fileInfo().filename; + } // attempt to eval properly and treat as css + + + importNode.css = true; // if that fails, this error will be thrown + + importNode.error = e; + } + + if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) { + if (evaldImportNode.options.multiple) { + context.importMultiple = true; + } // try appending if we haven't determined if it is css or not + + + const tryAppendLessExtension = evaldImportNode.css === undefined; + + for (let i = 0; i < importParent.rules.length; i++) { + if (importParent.rules[i] === importNode) { + importParent.rules[i] = evaldImportNode; + break; + } + } + + const onImported = this.onImported.bind(this, evaldImportNode, context); + + const sequencedOnImported = this._sequencer.addImport(onImported); + + this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(), evaldImportNode.options, sequencedOnImported); + } else { + this.importCount--; + + if (this.isFinished) { + this._sequencer.tryRun(); + } + } + }, + onImported: function onImported(importNode, context, e, root, importedAtRoot, fullPath) { + if (e) { + if (!e.filename) { + e.index = importNode.getIndex(); + e.filename = importNode.fileInfo().filename; + } + + this.error = e; + } + + const importVisitor = this; + const inlineCSS = importNode.options.inline; + const isPlugin = importNode.options.isPlugin; + const isOptional = importNode.options.optional; + const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector; + + if (!context.importMultiple) { + if (duplicateImport) { + importNode.skip = true; + } else { + importNode.skip = () => { + if (fullPath in importVisitor.onceFileDetectionMap) { + return true; + } + + importVisitor.onceFileDetectionMap[fullPath] = true; + return false; + }; + } + } + + if (!fullPath && isOptional) { + importNode.skip = true; + } + + if (root) { + importNode.root = root; + importNode.importedFilename = fullPath; + + if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) { + importVisitor.recursionDetector[fullPath] = true; + const oldContext = this.context; + this.context = context; + + try { + this._visitor.visit(root); + } catch (e) { + this.error = e; + } + + this.context = oldContext; + } + } + + importVisitor.importCount--; + + if (importVisitor.isFinished) { + importVisitor._sequencer.tryRun(); + } + }, + visitDeclaration: function visitDeclaration(declNode, visitArgs) { + if (declNode.value.type === 'DetachedRuleset') { + this.context.frames.unshift(declNode); + } else { + visitArgs.visitDeeper = false; + } + }, + visitDeclarationOut: function visitDeclarationOut(declNode) { + if (declNode.value.type === 'DetachedRuleset') { + this.context.frames.shift(); + } + }, + visitAtRule: function visitAtRule(atRuleNode, visitArgs) { + this.context.frames.unshift(atRuleNode); + }, + visitAtRuleOut: function visitAtRuleOut(atRuleNode) { + this.context.frames.shift(); + }, + visitMixinDefinition: function visitMixinDefinition(mixinDefinitionNode, visitArgs) { + this.context.frames.unshift(mixinDefinitionNode); + }, + visitMixinDefinitionOut: function visitMixinDefinitionOut(mixinDefinitionNode) { + this.context.frames.shift(); + }, + visitRuleset: function visitRuleset(rulesetNode, visitArgs) { + this.context.frames.unshift(rulesetNode); + }, + visitRulesetOut: function visitRulesetOut(rulesetNode) { + this.context.frames.shift(); + }, + visitMedia: function visitMedia(mediaNode, visitArgs) { + this.context.frames.unshift(mediaNode.rules[0]); + }, + visitMediaOut: function visitMediaOut(mediaNode) { + this.context.frames.shift(); + } +}; + +class SetTreeVisibilityVisitor { + constructor(visible) { + this.visible = visible; + } + + run(root) { + this.visit(root); + } + + visitArray(nodes) { + if (!nodes) { + return nodes; + } + + const cnt = nodes.length; + let i; + + for (i = 0; i < cnt; i++) { + this.visit(nodes[i]); + } + + return nodes; + } + + visit(node) { + if (!node) { + return node; + } + + if (node.constructor === Array) { + return this.visitArray(node); + } + + if (!node.blocksVisibility || node.blocksVisibility()) { + return node; + } + + if (this.visible) { + node.ensureVisibility(); + } else { + node.ensureInvisibility(); + } + + node.accept(this); + return node; + } + +} + +/* jshint loopfunc:true */ + +class ExtendFinderVisitor { + constructor() { + this._visitor = new Visitor(this); + this.contexts = []; + this.allExtendsStack = [[]]; + } + + run(root) { + root = this._visitor.visit(root); + root.allExtends = this.allExtendsStack[0]; + return root; + } + + visitDeclaration(declNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitMixinDefinition(mixinDefinitionNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitRuleset(rulesetNode, visitArgs) { + if (rulesetNode.root) { + return; + } + + let i; + let j; + let extend; + const allSelectorsExtendList = []; + let extendList; // get &:extend(.a); rules which apply to all selectors in this ruleset + + const rules = rulesetNode.rules; + const ruleCnt = rules ? rules.length : 0; + + for (i = 0; i < ruleCnt; i++) { + if (rulesetNode.rules[i] instanceof tree.Extend) { + allSelectorsExtendList.push(rules[i]); + rulesetNode.extendOnEveryPath = true; + } + } // now find every selector and apply the extends that apply to all extends + // and the ones which apply to an individual extend + + + const paths = rulesetNode.paths; + + for (i = 0; i < paths.length; i++) { + const selectorPath = paths[i]; + const selector = selectorPath[selectorPath.length - 1]; + const selExtendList = selector.extendList; + extendList = selExtendList ? copyArray(selExtendList).concat(allSelectorsExtendList) : allSelectorsExtendList; + + if (extendList) { + extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone()); + } + + for (j = 0; j < extendList.length; j++) { + this.foundExtends = true; + extend = extendList[j]; + extend.findSelfSelectors(selectorPath); + extend.ruleset = rulesetNode; + + if (j === 0) { + extend.firstExtendOnThisSelectorPath = true; + } + + this.allExtendsStack[this.allExtendsStack.length - 1].push(extend); + } + } + + this.contexts.push(rulesetNode.selectors); + } + + visitRulesetOut(rulesetNode) { + if (!rulesetNode.root) { + this.contexts.length = this.contexts.length - 1; + } + } + + visitMedia(mediaNode, visitArgs) { + mediaNode.allExtends = []; + this.allExtendsStack.push(mediaNode.allExtends); + } + + visitMediaOut(mediaNode) { + this.allExtendsStack.length = this.allExtendsStack.length - 1; + } + + visitAtRule(atRuleNode, visitArgs) { + atRuleNode.allExtends = []; + this.allExtendsStack.push(atRuleNode.allExtends); + } + + visitAtRuleOut(atRuleNode) { + this.allExtendsStack.length = this.allExtendsStack.length - 1; + } + +} + +class ProcessExtendsVisitor { + constructor() { + this._visitor = new Visitor(this); + } + + run(root) { + const extendFinder = new ExtendFinderVisitor(); + this.extendIndices = {}; + extendFinder.run(root); + + if (!extendFinder.foundExtends) { + return root; + } + + root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends)); + this.allExtendsStack = [root.allExtends]; + + const newRoot = this._visitor.visit(root); + + this.checkExtendsForNonMatched(root.allExtends); + return newRoot; + } + + checkExtendsForNonMatched(extendList) { + const indices = this.extendIndices; + extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => { + let selector = '_unknown_'; + + try { + selector = extend.selector.toCSS({}); + } catch (_) {} + + if (!indices[`${extend.index} ${selector}`]) { + indices[`${extend.index} ${selector}`] = true; + logger.warn(`extend '${selector}' has no matches`); + } + }); + } + + doExtendChaining(extendsList, extendsListTarget, iterationCount) { + // + // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering + // and pasting the selector we would do normally, but we are also adding an extend with the same target selector + // this means this new extend can then go and alter other extends + // + // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors + // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already + // processed if we look at each selector at a time, as is done in visitRuleset + let extendIndex; + let targetExtendIndex; + let matches; + const extendsToAdd = []; + let newSelector; + const extendVisitor = this; + let selectorPath; + let extend; + let targetExtend; + let newExtend; + iterationCount = iterationCount || 0; // loop through comparing every extend with every target extend. + // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place + // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one + // and the second is the target. + // the separation into two lists allows us to process a subset of chains with a bigger set, as is the + // case when processing media queries + + for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) { + for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) { + extend = extendsList[extendIndex]; + targetExtend = extendsListTarget[targetExtendIndex]; // look for circular references + + if (extend.parent_ids.indexOf(targetExtend.object_id) >= 0) { + continue; + } // find a match in the target extends self selector (the bit before :extend) + + + selectorPath = [targetExtend.selfSelectors[0]]; + matches = extendVisitor.findMatch(extend, selectorPath); + + if (matches.length) { + extend.hasFoundMatches = true; // we found a match, so for each self selector.. + + extend.selfSelectors.forEach(selfSelector => { + const info = targetExtend.visibilityInfo(); // process the extend as usual + + newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible()); // but now we create a new extend from it + + newExtend = new tree.Extend(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info); + newExtend.selfSelectors = newSelector; // add the extend onto the list of extends for that selector + + newSelector[newSelector.length - 1].extendList = [newExtend]; // record that we need to add it. + + extendsToAdd.push(newExtend); + newExtend.ruleset = targetExtend.ruleset; // remember its parents for circular references + + newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids); // only process the selector once.. if we have :extend(.a,.b) then multiple + // extends will look at the same selector path, so when extending + // we know that any others will be duplicates in terms of what is added to the css + + if (targetExtend.firstExtendOnThisSelectorPath) { + newExtend.firstExtendOnThisSelectorPath = true; + targetExtend.ruleset.paths.push(newSelector); + } + }); + } + } + } + + if (extendsToAdd.length) { + // try to detect circular references to stop a stack overflow. + // may no longer be needed. + this.extendChainCount++; + + if (iterationCount > 100) { + let selectorOne = '{unable to calculate}'; + let selectorTwo = '{unable to calculate}'; + + try { + selectorOne = extendsToAdd[0].selfSelectors[0].toCSS(); + selectorTwo = extendsToAdd[0].selector.toCSS(); + } catch (e) {} + + throw { + message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})` + }; + } // now process the new extends on the existing rules so that we can handle a extending b extending c extending + // d extending e... + + + return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1)); + } else { + return extendsToAdd; + } + } + + visitDeclaration(ruleNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitMixinDefinition(mixinDefinitionNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitSelector(selectorNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitRuleset(rulesetNode, visitArgs) { + if (rulesetNode.root) { + return; + } + + let matches; + let pathIndex; + let extendIndex; + const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1]; + const selectorsToAdd = []; + const extendVisitor = this; + let selectorPath; // look at each selector path in the ruleset, find any extend matches and then copy, find and replace + + for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) { + for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) { + selectorPath = rulesetNode.paths[pathIndex]; // extending extends happens initially, before the main pass + + if (rulesetNode.extendOnEveryPath) { + continue; + } + + const extendList = selectorPath[selectorPath.length - 1].extendList; + + if (extendList && extendList.length) { + continue; + } + + matches = this.findMatch(allExtends[extendIndex], selectorPath); + + if (matches.length) { + allExtends[extendIndex].hasFoundMatches = true; + allExtends[extendIndex].selfSelectors.forEach(selfSelector => { + let extendedSelectors; + extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible()); + selectorsToAdd.push(extendedSelectors); + }); + } + } + } + + rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd); + } + + findMatch(extend, haystackSelectorPath) { + // + // look through the haystack selector path to try and find the needle - extend.selector + // returns an array of selector matches that can then be replaced + // + let haystackSelectorIndex; + let hackstackSelector; + let hackstackElementIndex; + let haystackElement; + let targetCombinator; + let i; + const extendVisitor = this; + const needleElements = extend.selector.elements; + const potentialMatches = []; + let potentialMatch; + const matches = []; // loop through the haystack elements + + for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) { + hackstackSelector = haystackSelectorPath[haystackSelectorIndex]; + + for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) { + haystackElement = hackstackSelector.elements[hackstackElementIndex]; // if we allow elements before our match we can add a potential match every time. otherwise only at the first element. + + if (extend.allowBefore || haystackSelectorIndex === 0 && hackstackElementIndex === 0) { + potentialMatches.push({ + pathIndex: haystackSelectorIndex, + index: hackstackElementIndex, + matched: 0, + initialCombinator: haystackElement.combinator + }); + } + + for (i = 0; i < potentialMatches.length; i++) { + potentialMatch = potentialMatches[i]; // selectors add " " onto the first element. When we use & it joins the selectors together, but if we don't + // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to + // work out what the resulting combinator will be + + targetCombinator = haystackElement.combinator.value; + + if (targetCombinator === '' && hackstackElementIndex === 0) { + targetCombinator = ' '; + } // if we don't match, null our match to indicate failure + + + if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) || potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator) { + potentialMatch = null; + } else { + potentialMatch.matched++; + } // if we are still valid and have finished, test whether we have elements after and whether these are allowed + + + if (potentialMatch) { + potentialMatch.finished = potentialMatch.matched === needleElements.length; + + if (potentialMatch.finished && !extend.allowAfter && (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length)) { + potentialMatch = null; + } + } // if null we remove, if not, we are still valid, so either push as a valid match or continue + + + if (potentialMatch) { + if (potentialMatch.finished) { + potentialMatch.length = needleElements.length; + potentialMatch.endPathIndex = haystackSelectorIndex; + potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match + + potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again + + matches.push(potentialMatch); + } + } else { + potentialMatches.splice(i, 1); + i--; + } + } + } + } + + return matches; + } + + isElementValuesEqual(elementValue1, elementValue2) { + if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') { + return elementValue1 === elementValue2; + } + + if (elementValue1 instanceof tree.Attribute) { + if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) { + return false; + } + + if (!elementValue1.value || !elementValue2.value) { + if (elementValue1.value || elementValue2.value) { + return false; + } + + return true; + } + + elementValue1 = elementValue1.value.value || elementValue1.value; + elementValue2 = elementValue2.value.value || elementValue2.value; + return elementValue1 === elementValue2; + } + + elementValue1 = elementValue1.value; + elementValue2 = elementValue2.value; + + if (elementValue1 instanceof tree.Selector) { + if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) { + return false; + } + + for (let i = 0; i < elementValue1.elements.length; i++) { + if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) { + if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) { + return false; + } + } + + if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) { + return false; + } + } + + return true; + } + + return false; + } + + extendSelector(matches, selectorPath, replacementSelector, isVisible) { + // for a set of matches, replace each match with the replacement selector + let currentSelectorPathIndex = 0; + let currentSelectorPathElementIndex = 0; + let path = []; + let matchIndex; + let selector; + let firstElement; + let match; + let newElements; + + for (matchIndex = 0; matchIndex < matches.length; matchIndex++) { + match = matches[matchIndex]; + selector = selectorPath[match.pathIndex]; + firstElement = new tree.Element(match.initialCombinator, replacementSelector.elements[0].value, replacementSelector.elements[0].isVariable, replacementSelector.elements[0].getIndex(), replacementSelector.elements[0].fileInfo()); + + if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) { + path[path.length - 1].elements = path[path.length - 1].elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex)); + currentSelectorPathElementIndex = 0; + currentSelectorPathIndex++; + } + + newElements = selector.elements.slice(currentSelectorPathElementIndex, match.index).concat([firstElement]).concat(replacementSelector.elements.slice(1)); + + if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) { + path[path.length - 1].elements = path[path.length - 1].elements.concat(newElements); + } else { + path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex)); + path.push(new tree.Selector(newElements)); + } + + currentSelectorPathIndex = match.endPathIndex; + currentSelectorPathElementIndex = match.endPathElementIndex; + + if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) { + currentSelectorPathElementIndex = 0; + currentSelectorPathIndex++; + } + } + + if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) { + path[path.length - 1].elements = path[path.length - 1].elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex)); + currentSelectorPathIndex++; + } + + path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length)); + path = path.map(currentValue => { + // we can re-use elements here, because the visibility property matters only for selectors + const derived = currentValue.createDerived(currentValue.elements); + + if (isVisible) { + derived.ensureVisibility(); + } else { + derived.ensureInvisibility(); + } + + return derived; + }); + return path; + } + + visitMedia(mediaNode, visitArgs) { + let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); + newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends)); + this.allExtendsStack.push(newAllExtends); + } + + visitMediaOut(mediaNode) { + const lastIndex = this.allExtendsStack.length - 1; + this.allExtendsStack.length = lastIndex; + } + + visitAtRule(atRuleNode, visitArgs) { + let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]); + newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends)); + this.allExtendsStack.push(newAllExtends); + } + + visitAtRuleOut(atRuleNode) { + const lastIndex = this.allExtendsStack.length - 1; + this.allExtendsStack.length = lastIndex; + } + +} + +class JoinSelectorVisitor { + constructor() { + this.contexts = [[]]; + this._visitor = new Visitor(this); + } + + run(root) { + return this._visitor.visit(root); + } + + visitDeclaration(declNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitMixinDefinition(mixinDefinitionNode, visitArgs) { + visitArgs.visitDeeper = false; + } + + visitRuleset(rulesetNode, visitArgs) { + const context = this.contexts[this.contexts.length - 1]; + const paths = []; + let selectors; + this.contexts.push(paths); + + if (!rulesetNode.root) { + selectors = rulesetNode.selectors; + + if (selectors) { + selectors = selectors.filter(selector => selector.getIsOutput()); + rulesetNode.selectors = selectors.length ? selectors : selectors = null; + + if (selectors) { + rulesetNode.joinSelectors(paths, context, selectors); + } + } + + if (!selectors) { + rulesetNode.rules = null; + } + + rulesetNode.paths = paths; + } + } + + visitRulesetOut(rulesetNode) { + this.contexts.length = this.contexts.length - 1; + } + + visitMedia(mediaNode, visitArgs) { + const context = this.contexts[this.contexts.length - 1]; + mediaNode.rules[0].root = context.length === 0 || context[0].multiMedia; + } + + visitAtRule(atRuleNode, visitArgs) { + const context = this.contexts[this.contexts.length - 1]; + + if (atRuleNode.rules && atRuleNode.rules.length) { + atRuleNode.rules[0].root = atRuleNode.isRooted || context.length === 0 || null; + } + } + +} + +class CSSVisitorUtils { + constructor(context) { + this._visitor = new Visitor(this); + this._context = context; + } + + containsSilentNonBlockedChild(bodyRules) { + let rule; + + if (!bodyRules) { + return false; + } + + for (let r = 0; r < bodyRules.length; r++) { + rule = bodyRules[r]; + + if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) { + // the atrule contains something that was referenced (likely by extend) + // therefore it needs to be shown in output too + return true; + } + } + + return false; + } + + keepOnlyVisibleChilds(owner) { + if (owner && owner.rules) { + owner.rules = owner.rules.filter(thing => thing.isVisible()); + } + } + + isEmpty(owner) { + return owner && owner.rules ? owner.rules.length === 0 : true; + } + + hasVisibleSelector(rulesetNode) { + return rulesetNode && rulesetNode.paths ? rulesetNode.paths.length > 0 : false; + } + + resolveVisibility(node, originalRules) { + if (!node.blocksVisibility()) { + if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) { + return; + } + + return node; + } + + const compiledRulesBody = node.rules[0]; + this.keepOnlyVisibleChilds(compiledRulesBody); + + if (this.isEmpty(compiledRulesBody)) { + return; + } + + node.ensureVisibility(); + node.removeVisibilityBlock(); + return node; + } + + isVisibleRuleset(rulesetNode) { + if (rulesetNode.firstRoot) { + return true; + } + + if (this.isEmpty(rulesetNode)) { + return false; + } + + if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) { + return false; + } + + return true; + } + +} + +const ToCSSVisitor = function ToCSSVisitor(context) { + this._visitor = new Visitor(this); + this._context = context; + this.utils = new CSSVisitorUtils(context); +}; + +ToCSSVisitor.prototype = { + isReplacing: true, + run: function run(root) { + return this._visitor.visit(root); + }, + visitDeclaration: function visitDeclaration(declNode, visitArgs) { + if (declNode.blocksVisibility() || declNode.variable) { + return; + } + + return declNode; + }, + visitMixinDefinition: function visitMixinDefinition(mixinNode, visitArgs) { + // mixin definitions do not get eval'd - this means they keep state + // so we have to clear that state here so it isn't used if toCSS is called twice + mixinNode.frames = []; + }, + visitExtend: function visitExtend(extendNode, visitArgs) {}, + visitComment: function visitComment(commentNode, visitArgs) { + if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) { + return; + } + + return commentNode; + }, + visitMedia: function visitMedia(mediaNode, visitArgs) { + const originalRules = mediaNode.rules[0].rules; + mediaNode.accept(this._visitor); + visitArgs.visitDeeper = false; + return this.utils.resolveVisibility(mediaNode, originalRules); + }, + visitImport: function visitImport(importNode, visitArgs) { + if (importNode.blocksVisibility()) { + return; + } + + return importNode; + }, + visitAtRule: function visitAtRule(atRuleNode, visitArgs) { + if (atRuleNode.rules && atRuleNode.rules.length) { + return this.visitAtRuleWithBody(atRuleNode, visitArgs); + } else { + return this.visitAtRuleWithoutBody(atRuleNode, visitArgs); + } + }, + visitAnonymous: function visitAnonymous(anonymousNode, visitArgs) { + if (!anonymousNode.blocksVisibility()) { + anonymousNode.accept(this._visitor); + return anonymousNode; + } + }, + visitAtRuleWithBody: function visitAtRuleWithBody(atRuleNode, visitArgs) { + // if there is only one nested ruleset and that one has no path, then it is + // just fake ruleset + function hasFakeRuleset(atRuleNode) { + const bodyRules = atRuleNode.rules; + return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0); + } + + function getBodyRules(atRuleNode) { + const nodeRules = atRuleNode.rules; + + if (hasFakeRuleset(atRuleNode)) { + return nodeRules[0].rules; + } + + return nodeRules; + } // it is still true that it is only one ruleset in array + // this is last such moment + // process childs + + + const originalRules = getBodyRules(atRuleNode); + atRuleNode.accept(this._visitor); + visitArgs.visitDeeper = false; + + if (!this.utils.isEmpty(atRuleNode)) { + this._mergeRules(atRuleNode.rules[0].rules); + } + + return this.utils.resolveVisibility(atRuleNode, originalRules); + }, + visitAtRuleWithoutBody: function visitAtRuleWithoutBody(atRuleNode, visitArgs) { + if (atRuleNode.blocksVisibility()) { + return; + } + + if (atRuleNode.name === '@charset') { + // Only output the debug info together with subsequent @charset definitions + // a comment (or @media statement) before the actual @charset atrule would + // be considered illegal css as it has to be on the first line + if (this.charset) { + if (atRuleNode.debugInfo) { + const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\n/g, '')} */\n`); + comment.debugInfo = atRuleNode.debugInfo; + return this._visitor.visit(comment); + } + + return; + } + + this.charset = true; + } + + return atRuleNode; + }, + checkValidNodes: function checkValidNodes(rules, isRoot) { + if (!rules) { + return; + } + + for (let i = 0; i < rules.length; i++) { + const ruleNode = rules[i]; + + if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) { + throw { + message: 'Properties must be inside selector blocks. They cannot be in the root', + index: ruleNode.getIndex(), + filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename + }; + } + + if (ruleNode instanceof tree.Call) { + throw { + message: `Function '${ruleNode.name}' is undefined`, + index: ruleNode.getIndex(), + filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename + }; + } + + if (ruleNode.type && !ruleNode.allowRoot) { + throw { + message: `${ruleNode.type} node returned by a function is not valid here`, + index: ruleNode.getIndex(), + filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename + }; + } + } + }, + visitRuleset: function visitRuleset(rulesetNode, visitArgs) { + // at this point rulesets are nested into each other + let rule; + const rulesets = []; + this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot); + + if (!rulesetNode.root) { + // remove invisible paths + this._compileRulesetPaths(rulesetNode); // remove rulesets from this ruleset body and compile them separately + + + const nodeRules = rulesetNode.rules; + let nodeRuleCnt = nodeRules ? nodeRules.length : 0; + + for (let i = 0; i < nodeRuleCnt;) { + rule = nodeRules[i]; + + if (rule && rule.rules) { + // visit because we are moving them out from being a child + rulesets.push(this._visitor.visit(rule)); + nodeRules.splice(i, 1); + nodeRuleCnt--; + continue; + } + + i++; + } // accept the visitor to remove rules and refactor itself + // then we can decide nogw whether we want it or not + // compile body + + + if (nodeRuleCnt > 0) { + rulesetNode.accept(this._visitor); + } else { + rulesetNode.rules = null; + } + + visitArgs.visitDeeper = false; + } else { + // if (! rulesetNode.root) { + rulesetNode.accept(this._visitor); + visitArgs.visitDeeper = false; + } + + if (rulesetNode.rules) { + this._mergeRules(rulesetNode.rules); + + this._removeDuplicateRules(rulesetNode.rules); + } // now decide whether we keep the ruleset + + + if (this.utils.isVisibleRuleset(rulesetNode)) { + rulesetNode.ensureVisibility(); + rulesets.splice(0, 0, rulesetNode); + } + + if (rulesets.length === 1) { + return rulesets[0]; + } + + return rulesets; + }, + _compileRulesetPaths: function _compileRulesetPaths(rulesetNode) { + if (rulesetNode.paths) { + rulesetNode.paths = rulesetNode.paths.filter(p => { + let i; + + if (p[0].elements[0].combinator.value === ' ') { + p[0].elements[0].combinator = new tree.Combinator(''); + } + + for (i = 0; i < p.length; i++) { + if (p[i].isVisible() && p[i].getIsOutput()) { + return true; + } + } + + return false; + }); + } + }, + _removeDuplicateRules: function _removeDuplicateRules(rules) { + if (!rules) { + return; + } // remove duplicates + + + const ruleCache = {}; + let ruleList; + let rule; + let i; + + for (i = rules.length - 1; i >= 0; i--) { + rule = rules[i]; + + if (rule instanceof tree.Declaration) { + if (!ruleCache[rule.name]) { + ruleCache[rule.name] = rule; + } else { + ruleList = ruleCache[rule.name]; + + if (ruleList instanceof tree.Declaration) { + ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)]; + } + + const ruleCSS = rule.toCSS(this._context); + + if (ruleList.indexOf(ruleCSS) !== -1) { + rules.splice(i, 1); + } else { + ruleList.push(ruleCSS); + } + } + } + } + }, + _mergeRules: function _mergeRules(rules) { + if (!rules) { + return; + } + + const groups = {}; + const groupsArr = []; + + for (let i = 0; i < rules.length; i++) { + const rule = rules[i]; + + if (rule.merge) { + const key = rule.name; + groups[key] ? rules.splice(i--, 1) : groupsArr.push(groups[key] = []); + groups[key].push(rule); + } + } + + groupsArr.forEach(group => { + if (group.length > 0) { + const result = group[0]; + let space = []; + const comma = [new tree.Expression(space)]; + group.forEach(rule => { + if (rule.merge === '+' && space.length > 0) { + comma.push(new tree.Expression(space = [])); + } + + space.push(rule.value); + result.important = result.important || rule.important; + }); + result.value = new tree.Value(comma); + } + }); + } +}; + +var visitors = { + Visitor, + ImportVisitor, + MarkVisibleSelectorsVisitor: SetTreeVisibilityVisitor, + ExtendVisitor: ProcessExtendsVisitor, + JoinSelectorVisitor, + ToCSSVisitor +}; + +// Split the input into chunks. +var chunker = ((input, fail) => { + const len = input.length; + let level = 0; + let parenLevel = 0; + let lastOpening; + let lastOpeningParen; + let lastMultiComment; + let lastMultiCommentEndBrace; + const chunks = []; + let emitFrom = 0; + let chunkerCurrentIndex; + let currentChunkStartIndex; + let cc; + let cc2; + let matched; + + function emitChunk(force) { + const len = chunkerCurrentIndex - emitFrom; + + if (len < 512 && !force || !len) { + return; + } + + chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1)); + emitFrom = chunkerCurrentIndex + 1; + } + + for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) { + cc = input.charCodeAt(chunkerCurrentIndex); + + if (cc >= 97 && cc <= 122 || cc < 34) { + // a-z or whitespace + continue; + } + + switch (cc) { + case 40: + // ( + parenLevel++; + lastOpeningParen = chunkerCurrentIndex; + continue; + + case 41: + // ) + if (--parenLevel < 0) { + return fail('missing opening `(`', chunkerCurrentIndex); + } + + continue; + + case 59: + // ; + if (!parenLevel) { + emitChunk(); + } + + continue; + + case 123: + // { + level++; + lastOpening = chunkerCurrentIndex; + continue; + + case 125: + // } + if (--level < 0) { + return fail('missing opening `{`', chunkerCurrentIndex); + } + + if (!level && !parenLevel) { + emitChunk(); + } + + continue; + + case 92: + // \ + if (chunkerCurrentIndex < len - 1) { + chunkerCurrentIndex++; + continue; + } + + return fail('unescaped `\\`', chunkerCurrentIndex); + + case 34: + case 39: + case 96: + // ", ' and ` + matched = 0; + currentChunkStartIndex = chunkerCurrentIndex; + + for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) { + cc2 = input.charCodeAt(chunkerCurrentIndex); + + if (cc2 > 96) { + continue; + } + + if (cc2 == cc) { + matched = 1; + break; + } + + if (cc2 == 92) { + // \ + if (chunkerCurrentIndex == len - 1) { + return fail('unescaped `\\`', chunkerCurrentIndex); + } + + chunkerCurrentIndex++; + } + } + + if (matched) { + continue; + } + + return fail(`unmatched \`${String.fromCharCode(cc)}\``, currentChunkStartIndex); + + case 47: + // /, check for comment + if (parenLevel || chunkerCurrentIndex == len - 1) { + continue; + } + + cc2 = input.charCodeAt(chunkerCurrentIndex + 1); + + if (cc2 == 47) { + // //, find lnfeed + for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) { + cc2 = input.charCodeAt(chunkerCurrentIndex); + + if (cc2 <= 13 && (cc2 == 10 || cc2 == 13)) { + break; + } + } + } else if (cc2 == 42) { + // /*, find */ + lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex; + + for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) { + cc2 = input.charCodeAt(chunkerCurrentIndex); + + if (cc2 == 125) { + lastMultiCommentEndBrace = chunkerCurrentIndex; + } + + if (cc2 != 42) { + continue; + } + + if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { + break; + } + } + + if (chunkerCurrentIndex == len - 1) { + return fail('missing closing `*/`', currentChunkStartIndex); + } + + chunkerCurrentIndex++; + } + + continue; + + case 42: + // *, check for unmatched */ + if (chunkerCurrentIndex < len - 1 && input.charCodeAt(chunkerCurrentIndex + 1) == 47) { + return fail('unmatched `/*`', chunkerCurrentIndex); + } + + continue; + } + } + + if (level !== 0) { + if (lastMultiComment > lastOpening && lastMultiCommentEndBrace > lastMultiComment) { + return fail('missing closing `}` or `*/`', lastOpening); + } else { + return fail('missing closing `}`', lastOpening); + } + } else if (parenLevel !== 0) { + return fail('missing closing `)`', lastOpeningParen); + } + + emitChunk(true); + return chunks; +}); + +var getParserInput = (() => { + let // Less input string + input; + let // current chunk + j; + const // holds state for backtracking + saveStack = []; + let // furthest index the parser has gone to + furthest; + let // if this is furthest we got to, this is the probably cause + furthestPossibleErrorMessage; + let // chunkified input + chunks; + let // current chunk + current; + let // index of current chunk, in `input` + currentPos; + const parserInput = {}; + const CHARCODE_SPACE = 32; + const CHARCODE_TAB = 9; + const CHARCODE_LF = 10; + const CHARCODE_CR = 13; + const CHARCODE_PLUS = 43; + const CHARCODE_COMMA = 44; + const CHARCODE_FORWARD_SLASH = 47; + const CHARCODE_9 = 57; + + function skipWhitespace(length) { + const oldi = parserInput.i; + const oldj = j; + const curr = parserInput.i - currentPos; + const endIndex = parserInput.i + current.length - curr; + const mem = parserInput.i += length; + const inp = input; + let c; + let nextChar; + let comment; + + for (; parserInput.i < endIndex; parserInput.i++) { + c = inp.charCodeAt(parserInput.i); + + if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) { + nextChar = inp.charAt(parserInput.i + 1); + + if (nextChar === '/') { + comment = { + index: parserInput.i, + isLineComment: true + }; + let nextNewLine = inp.indexOf('\n', parserInput.i + 2); + + if (nextNewLine < 0) { + nextNewLine = endIndex; + } + + parserInput.i = nextNewLine; + comment.text = inp.substr(comment.index, parserInput.i - comment.index); + parserInput.commentStore.push(comment); + continue; + } else if (nextChar === '*') { + const nextStarSlash = inp.indexOf('*/', parserInput.i + 2); + + if (nextStarSlash >= 0) { + comment = { + index: parserInput.i, + text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i), + isLineComment: false + }; + parserInput.i += comment.text.length - 1; + parserInput.commentStore.push(comment); + continue; + } + } + + break; + } + + if (c !== CHARCODE_SPACE && c !== CHARCODE_LF && c !== CHARCODE_TAB && c !== CHARCODE_CR) { + break; + } + } + + current = current.slice(length + parserInput.i - mem + curr); + currentPos = parserInput.i; + + if (!current.length) { + if (j < chunks.length - 1) { + current = chunks[++j]; + skipWhitespace(0); // skip space at the beginning of a chunk + + return true; // things changed + } + + parserInput.finished = true; + } + + return oldi !== parserInput.i || oldj !== j; + } + + parserInput.save = () => { + currentPos = parserInput.i; + saveStack.push({ + current, + i: parserInput.i, + j + }); + }; + + parserInput.restore = possibleErrorMessage => { + if (parserInput.i > furthest || parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage) { + furthest = parserInput.i; + furthestPossibleErrorMessage = possibleErrorMessage; + } + + const state = saveStack.pop(); + current = state.current; + currentPos = parserInput.i = state.i; + j = state.j; + }; + + parserInput.forget = () => { + saveStack.pop(); + }; + + parserInput.isWhitespace = offset => { + const pos = parserInput.i + (offset || 0); + const code = input.charCodeAt(pos); + return code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF; + }; // Specialization of $(tok) + + + parserInput.$re = tok => { + if (parserInput.i > currentPos) { + current = current.slice(parserInput.i - currentPos); + currentPos = parserInput.i; + } + + const m = tok.exec(current); + + if (!m) { + return null; + } + + skipWhitespace(m[0].length); + + if (typeof m === 'string') { + return m; + } + + return m.length === 1 ? m[0] : m; + }; + + parserInput.$char = tok => { + if (input.charAt(parserInput.i) !== tok) { + return null; + } + + skipWhitespace(1); + return tok; + }; + + parserInput.$str = tok => { + const tokLength = tok.length; // https://jsperf.com/string-startswith/21 + + for (let i = 0; i < tokLength; i++) { + if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { + return null; + } + } + + skipWhitespace(tokLength); + return tok; + }; + + parserInput.$quoted = loc => { + const pos = loc || parserInput.i; + const startChar = input.charAt(pos); + + if (startChar !== '\'' && startChar !== '"') { + return; + } + + const length = input.length; + const currentPosition = pos; + + for (let i = 1; i + currentPosition < length; i++) { + const nextChar = input.charAt(i + currentPosition); + + switch (nextChar) { + case '\\': + i++; + continue; + + case '\r': + case '\n': + break; + + case startChar: + const str = input.substr(currentPosition, i + 1); + + if (!loc && loc !== 0) { + skipWhitespace(i + 1); + return str; + } + + return [startChar, str]; + + default: + } + } + + return null; + }; + /** + * Permissive parsing. Ignores everything except matching {} [] () and quotes + * until matching token (outside of blocks) + */ + + + parserInput.$parseUntil = tok => { + let quote = ''; + let returnVal = null; + let inComment = false; + let blockDepth = 0; + const blockStack = []; + const parseGroups = []; + const length = input.length; + const startPos = parserInput.i; + let lastPos = parserInput.i; + let i = parserInput.i; + let loop = true; + let testChar; + + if (typeof tok === 'string') { + testChar = char => char === tok; + } else { + testChar = char => tok.test(char); + } + + do { + let nextChar = input.charAt(i); + + if (blockDepth === 0 && testChar(nextChar)) { + returnVal = input.substr(lastPos, i - lastPos); + + if (returnVal) { + parseGroups.push(returnVal); + } else { + parseGroups.push(' '); + } + + returnVal = parseGroups; + skipWhitespace(i - startPos); + loop = false; + } else { + if (inComment) { + if (nextChar === '*' && input.charAt(i + 1) === '/') { + i++; + blockDepth--; + inComment = false; + } + + i++; + continue; + } + + switch (nextChar) { + case '\\': + i++; + nextChar = input.charAt(i); + parseGroups.push(input.substr(lastPos, i - lastPos + 1)); + lastPos = i + 1; + break; + + case '/': + if (input.charAt(i + 1) === '*') { + i++; + inComment = true; + blockDepth++; + } + + break; + + case '\'': + case '"': + quote = parserInput.$quoted(i); + + if (quote) { + parseGroups.push(input.substr(lastPos, i - lastPos), quote); + i += quote[1].length - 1; + lastPos = i + 1; + } else { + skipWhitespace(i - startPos); + returnVal = nextChar; + loop = false; + } + + break; + + case '{': + blockStack.push('}'); + blockDepth++; + break; + + case '(': + blockStack.push(')'); + blockDepth++; + break; + + case '[': + blockStack.push(']'); + blockDepth++; + break; + + case '}': + case ')': + case ']': + const expected = blockStack.pop(); + + if (nextChar === expected) { + blockDepth--; + } else { + // move the parser to the error and return expected + skipWhitespace(i - startPos); + returnVal = expected; + loop = false; + } + + } + + i++; + + if (i > length) { + loop = false; + } + } + } while (loop); + + return returnVal ? returnVal : null; + }; + + parserInput.autoCommentAbsorb = true; + parserInput.commentStore = []; + parserInput.finished = false; // Same as $(), but don't change the state of the parser, + // just return the match. + + parserInput.peek = tok => { + if (typeof tok === 'string') { + // https://jsperf.com/string-startswith/21 + for (let i = 0; i < tok.length; i++) { + if (input.charAt(parserInput.i + i) !== tok.charAt(i)) { + return false; + } + } + + return true; + } else { + return tok.test(current); + } + }; // Specialization of peek() + // TODO remove or change some currentChar calls to peekChar + + + parserInput.peekChar = tok => input.charAt(parserInput.i) === tok; + + parserInput.currentChar = () => input.charAt(parserInput.i); + + parserInput.prevChar = () => input.charAt(parserInput.i - 1); + + parserInput.getInput = () => input; + + parserInput.peekNotNumeric = () => { + const c = input.charCodeAt(parserInput.i); // Is the first char of the dimension 0-9, '.', '+' or '-' + + return c > CHARCODE_9 || c < CHARCODE_PLUS || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA; + }; + + parserInput.start = (str, chunkInput, failFunction) => { + input = str; + parserInput.i = j = currentPos = furthest = 0; // chunking apparently makes things quicker (but my tests indicate + // it might actually make things slower in node at least) + // and it is a non-perfect parse - it can't recognise + // unquoted urls, meaning it can't distinguish comments + // meaning comments with quotes or {}() in them get 'counted' + // and then lead to parse errors. + // In addition if the chunking chunks in the wrong place we might + // not be able to parse a parser statement in one go + // this is officially deprecated but can be switched on via an option + // in the case it causes too much performance issues. + + if (chunkInput) { + chunks = chunker(str, failFunction); + } else { + chunks = [str]; + } + + current = chunks[0]; + skipWhitespace(0); + }; + + parserInput.end = () => { + let message; + const isFinished = parserInput.i >= input.length; + + if (parserInput.i < furthest) { + message = furthestPossibleErrorMessage; + parserInput.i = furthest; + } + + return { + isFinished, + furthest: parserInput.i, + furthestPossibleErrorMessage: message, + furthestReachedEnd: parserInput.i >= input.length - 1, + furthestChar: input[parserInput.i] + }; + }; + + return parserInput; +}); + +// less.js - parser +// +// A relatively straight-forward predictive parser. +// There is no tokenization/lexing stage, the input is parsed +// in one sweep. +// +// To make the parser fast enough to run in the browser, several +// optimization had to be made: +// +// - Matching and slicing on a huge input is often cause of slowdowns. +// The solution is to chunkify the input into smaller strings. +// The chunks are stored in the `chunks` var, +// `j` holds the current chunk index, and `currentPos` holds +// the index of the current chunk in relation to `input`. +// This gives us an almost 4x speed-up. +// +// - In many cases, we don't need to match individual tokens; +// for example, if a value doesn't hold any variables, operations +// or dynamic references, the parser can effectively 'skip' it, +// treating it as a literal. +// An example would be '1px solid #000' - which evaluates to itself, +// we don't need to know what the individual components are. +// The drawback, of course is that you don't get the benefits of +// syntax-checking on the CSS. This gives us a 50% speed-up in the parser, +// and a smaller speed-up in the code-gen. +// +// +// Token matching is done with the `$` function, which either takes +// a terminal string or regexp, or a non-terminal function to call. +// It also takes care of moving all the indices forwards. +// + +const Parser = function Parser(context, imports, fileInfo) { + let parsers; + const parserInput = getParserInput(); + + function error(msg, type) { + throw new LessError({ + index: parserInput.i, + filename: fileInfo.filename, + type: type || 'Syntax', + message: msg + }, imports); + } + + function expect(arg, msg) { + // some older browsers return typeof 'function' for RegExp + const result = arg instanceof Function ? arg.call(parsers) : parserInput.$re(arg); + + if (result) { + return result; + } + + error(msg || (typeof arg === 'string' ? `expected '${arg}' got '${parserInput.currentChar()}'` : 'unexpected token')); + } // Specialization of expect() + + + function expectChar(arg, msg) { + if (parserInput.$char(arg)) { + return arg; + } + + error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`); + } + + function getDebugInfo(index) { + const filename = fileInfo.filename; + return { + lineNumber: getLocation(index, parserInput.getInput()).line + 1, + fileName: filename + }; + } + /** + * Used after initial parsing to create nodes on the fly + * + * @param {String} str - string to parse + * @param {Array} parseList - array of parsers to run input through e.g. ["value", "important"] + * @param {Number} currentIndex - start number to begin indexing + * @param {Object} fileInfo - fileInfo to attach to created nodes + */ + + + function parseNode(str, parseList, currentIndex, fileInfo, callback) { + let result; + const returnNodes = []; + const parser = parserInput; + + try { + parser.start(str, false, function fail(msg, index) { + callback({ + message: msg, + index: index + currentIndex + }); + }); + + for (let x = 0, p, i; p = parseList[x]; x++) { + i = parser.i; + result = parsers[p](); + + if (result) { + result._index = i + currentIndex; + result._fileInfo = fileInfo; + returnNodes.push(result); + } else { + returnNodes.push(null); + } + } + + const endInfo = parser.end(); + + if (endInfo.isFinished) { + callback(null, returnNodes); + } else { + callback(true, null); + } + } catch (e) { + throw new LessError({ + index: e.index + currentIndex, + message: e.message + }, imports, fileInfo.filename); + } + } // + // The Parser + // + + + return { + parserInput, + imports, + fileInfo, + parseNode, + // + // Parse an input string into an abstract syntax tree, + // @param str A string containing 'less' markup + // @param callback call `callback` when done. + // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply + // + parse: function parse(str, callback, additionalData) { + let root; + let error = null; + let globalVars; + let modifyVars; + let ignored; + let preText = ''; + globalVars = additionalData && additionalData.globalVars ? `${Parser.serializeVars(additionalData.globalVars)}\n` : ''; + modifyVars = additionalData && additionalData.modifyVars ? `\n${Parser.serializeVars(additionalData.modifyVars)}` : ''; + + if (context.pluginManager) { + const preProcessors = context.pluginManager.getPreProcessors(); + + for (let i = 0; i < preProcessors.length; i++) { + str = preProcessors[i].process(str, { + context, + imports, + fileInfo + }); + } + } + + if (globalVars || additionalData && additionalData.banner) { + preText = (additionalData && additionalData.banner ? additionalData.banner : '') + globalVars; + ignored = imports.contentsIgnoredChars; + ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0; + ignored[fileInfo.filename] += preText.length; + } + + str = str.replace(/\r\n?/g, '\n'); // Remove potential UTF Byte Order Mark + + str = preText + str.replace(/^\uFEFF/, '') + modifyVars; + imports.contents[fileInfo.filename] = str; // Start with the primary rule. + // The whole syntax tree is held under a Ruleset node, + // with the `root` property set to true, so no `{}` are + // output. The callback is called when the input is parsed. + + try { + parserInput.start(str, context.chunkInput, function fail(msg, index) { + throw new LessError({ + index, + type: 'Parse', + message: msg, + filename: fileInfo.filename + }, imports); + }); + tree.Node.prototype.parse = this; + root = new tree.Ruleset(null, this.parsers.primary()); + tree.Node.prototype.rootNode = root; + root.root = true; + root.firstRoot = true; + root.functionRegistry = functionRegistry.inherit(); + } catch (e) { + return callback(new LessError(e, imports, fileInfo.filename)); + } // If `i` is smaller than the `input.length - 1`, + // it means the parser wasn't able to parse the whole + // string, so we've got a parsing error. + // + // We try to extract a \n delimited string, + // showing the line where the parse error occurred. + // We split it up into two parts (the part which parsed, + // and the part which didn't), so we can color them differently. + + + const endInfo = parserInput.end(); + + if (!endInfo.isFinished) { + let message = endInfo.furthestPossibleErrorMessage; + + if (!message) { + message = 'Unrecognised input'; + + if (endInfo.furthestChar === '}') { + message += '. Possibly missing opening \'{\''; + } else if (endInfo.furthestChar === ')') { + message += '. Possibly missing opening \'(\''; + } else if (endInfo.furthestReachedEnd) { + message += '. Possibly missing something'; + } + } + + error = new LessError({ + type: 'Parse', + message, + index: endInfo.furthest, + filename: fileInfo.filename + }, imports); + } + + const finish = e => { + e = error || e || imports.error; + + if (e) { + if (!(e instanceof LessError)) { + e = new LessError(e, imports, fileInfo.filename); + } + + return callback(e); + } else { + return callback(null, root); + } + }; + + if (context.processImports !== false) { + new visitors.ImportVisitor(imports, finish).run(root); + } else { + return finish(); + } + }, + // + // Here in, the parsing rules/functions + // + // The basic structure of the syntax tree generated is as follows: + // + // Ruleset -> Declaration -> Value -> Expression -> Entity + // + // Here's some Less code: + // + // .class { + // color: #fff; + // border: 1px solid #000; + // width: @w + 4px; + // > .child {...} + // } + // + // And here's what the parse tree might look like: + // + // Ruleset (Selector '.class', [ + // Declaration ("color", Value ([Expression [Color #fff]])) + // Declaration ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]])) + // Declaration ("width", Value ([Expression [Operation " + " [Variable "@w"][Dimension 4px]]])) + // Ruleset (Selector [Element '>', '.child'], [...]) + // ]) + // + // In general, most rules will try to parse a token with the `$re()` function, and if the return + // value is truly, will return a new node, of the relevant type. Sometimes, we need to check + // first, before parsing, that's when we use `peek()`. + // + parsers: parsers = { + // + // The `primary` rule is the *entry* and *exit* point of the parser. + // The rules here can appear at any level of the parse tree. + // + // The recursive nature of the grammar is an interplay between the `block` + // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule, + // as represented by this simplified grammar: + // + // primary → (ruleset | declaration)+ + // ruleset → selector+ block + // block → '{' primary '}' + // + // Only at one point is the primary rule not called from the + // block rule: at the root level. + // + primary: function primary() { + const mixin = this.mixin; + let root = []; + let node; + + while (true) { + while (true) { + node = this.comment(); + + if (!node) { + break; + } + + root.push(node); + } // always process comments before deciding if finished + + + if (parserInput.finished) { + break; + } + + if (parserInput.peek('}')) { + break; + } + + node = this.extendRule(); + + if (node) { + root = root.concat(node); + continue; + } + + node = mixin.definition() || this.declaration() || this.ruleset() || mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule(); + + if (node) { + root.push(node); + } else { + let foundSemiColon = false; + + while (parserInput.$char(';')) { + foundSemiColon = true; + } + + if (!foundSemiColon) { + break; + } + } + } + + return root; + }, + // comments are collected by the main parsing mechanism and then assigned to nodes + // where the current structure allows it + comment: function comment() { + if (parserInput.commentStore.length) { + const comment = parserInput.commentStore.shift(); + return new tree.Comment(comment.text, comment.isLineComment, comment.index, fileInfo); + } + }, + // + // Entities are tokens which can be found inside an Expression + // + entities: { + mixinLookup: function mixinLookup() { + return parsers.mixin.call(true, true); + }, + // + // A string, which supports escaping " and ' + // + // "milky way" 'he\'s the one!' + // + quoted: function quoted(forceEscaped) { + let str; + const index = parserInput.i; + let isEscaped = false; + parserInput.save(); + + if (parserInput.$char('~')) { + isEscaped = true; + } else if (forceEscaped) { + parserInput.restore(); + return; + } + + str = parserInput.$quoted(); + + if (!str) { + parserInput.restore(); + return; + } + + parserInput.forget(); + return new tree.Quoted(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo); + }, + // + // A catch-all word, such as: + // + // black border-collapse + // + keyword: function keyword() { + const k = parserInput.$char('%') || parserInput.$re(/^\[?(?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\]?/); + + if (k) { + return tree.Color.fromKeyword(k) || new tree.Keyword(k); + } + }, + // + // A function call + // + // rgb(255, 0, 255) + // + // The arguments are parsed with the `entities.arguments` parser. + // + call: function call() { + let name; + let args; + let func; + const index = parserInput.i; // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 + + if (parserInput.peek(/^url\(/i)) { + return; + } + + parserInput.save(); + name = parserInput.$re(/^([\w-]+|%|progid:[\w\.]+)\(/); + + if (!name) { + parserInput.forget(); + return; + } + + name = name[1]; + func = this.customFuncCall(name); + + if (func) { + args = func.parse(); + + if (args && func.stop) { + parserInput.forget(); + return args; + } + } + + args = this.arguments(args); + + if (!parserInput.$char(')')) { + parserInput.restore('Could not parse call arguments or missing \')\''); + return; + } + + parserInput.forget(); + return new tree.Call(name, args, index, fileInfo); + }, + // + // Parsing rules for functions with non-standard args, e.g.: + // + // boolean(not(2 > 1)) + // + // This is a quick prototype, to be modified/improved when + // more custom-parsed funcs come (e.g. `selector(...)`) + // + customFuncCall: function customFuncCall(name) { + /* Ideally the table is to be moved out of here for faster perf., + but it's quite tricky since it relies on all these `parsers` + and `expect` available only here */ + return { + alpha: f(parsers.ieAlpha, true), + boolean: f(condition), + 'if': f(condition) + }[name.toLowerCase()]; + + function f(parse, stop) { + return { + parse, + // parsing function + stop // when true - stop after parse() and return its result, + // otherwise continue for plain args + + }; + } + + function condition() { + return [expect(parsers.condition, 'expected condition')]; + } + }, + arguments: function _arguments(prevArgs) { + let argsComma = prevArgs || []; + const argsSemiColon = []; + let isSemiColonSeparated; + let value; + parserInput.save(); + + while (true) { + if (prevArgs) { + prevArgs = false; + } else { + value = parsers.detachedRuleset() || this.assignment() || parsers.expression(); + + if (!value) { + break; + } + + if (value.value && value.value.length == 1) { + value = value.value[0]; + } + + argsComma.push(value); + } + + if (parserInput.$char(',')) { + continue; + } + + if (parserInput.$char(';') || isSemiColonSeparated) { + isSemiColonSeparated = true; + value = argsComma.length < 1 ? argsComma[0] : new tree.Value(argsComma); + argsSemiColon.push(value); + argsComma = []; + } + } + + parserInput.forget(); + return isSemiColonSeparated ? argsSemiColon : argsComma; + }, + literal: function literal() { + return this.dimension() || this.color() || this.quoted() || this.unicodeDescriptor(); + }, + // Assignments are argument entities for calls. + // They are present in ie filter properties as shown below. + // + // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* ) + // + assignment: function assignment() { + let key; + let value; + parserInput.save(); + key = parserInput.$re(/^\w+(?=\s?=)/i); + + if (!key) { + parserInput.restore(); + return; + } + + if (!parserInput.$char('=')) { + parserInput.restore(); + return; + } + + value = parsers.entity(); + + if (value) { + parserInput.forget(); + return new tree.Assignment(key, value); + } else { + parserInput.restore(); + } + }, + // + // Parse url() tokens + // + // We use a specific rule for urls, because they don't really behave like + // standard function calls. The difference is that the argument doesn't have + // to be enclosed within a string, so it can't be parsed as an Expression. + // + url: function url() { + let value; + const index = parserInput.i; + parserInput.autoCommentAbsorb = false; + + if (!parserInput.$str('url(')) { + parserInput.autoCommentAbsorb = true; + return; + } + + value = this.quoted() || this.variable() || this.property() || parserInput.$re(/^(?:(?:\\[\(\)'"])|[^\(\)'"])+/) || ''; + parserInput.autoCommentAbsorb = true; + expectChar(')'); + return new tree.URL(value.value != null || value instanceof tree.Variable || value instanceof tree.Property ? value : new tree.Anonymous(value, index), index, fileInfo); + }, + // + // A Variable entity, such as `@fink`, in + // + // width: @fink + 2px + // + // We use a different parser for variable definitions, + // see `parsers.variable`. + // + variable: function variable() { + let ch; + let name; + const index = parserInput.i; + parserInput.save(); + + if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\w-]+/))) { + ch = parserInput.currentChar(); + + if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\s/)) { + // this may be a VariableCall lookup + const result = parsers.variableCall(name); + + if (result) { + parserInput.forget(); + return result; + } + } + + parserInput.forget(); + return new tree.Variable(name, index, fileInfo); + } + + parserInput.restore(); + }, + // A variable entity using the protective {} e.g. @{var} + variableCurly: function variableCurly() { + let curly; + const index = parserInput.i; + + if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\{([\w-]+)\}/))) { + return new tree.Variable(`@${curly[1]}`, index, fileInfo); + } + }, + // + // A Property accessor, such as `$color`, in + // + // background-color: $color + // + property: function property() { + let name; + const index = parserInput.i; + + if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\$[\w-]+/))) { + return new tree.Property(name, index, fileInfo); + } + }, + // A property entity useing the protective {} e.g. ${prop} + propertyCurly: function propertyCurly() { + let curly; + const index = parserInput.i; + + if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\$\{([\w-]+)\}/))) { + return new tree.Property(`$${curly[1]}`, index, fileInfo); + } + }, + // + // A Hexadecimal color + // + // #4F3C2F + // + // `rgb` and `hsl` colors are parsed through the `entities.call` parser. + // + color: function color() { + let rgb; + parserInput.save(); + + if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\w.#\[])?/))) { + if (!rgb[2]) { + parserInput.forget(); + return new tree.Color(rgb[1], undefined, rgb[0]); + } + } + + parserInput.restore(); + }, + colorKeyword: function colorKeyword() { + parserInput.save(); + const autoCommentAbsorb = parserInput.autoCommentAbsorb; + parserInput.autoCommentAbsorb = false; + const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/); + parserInput.autoCommentAbsorb = autoCommentAbsorb; + + if (!k) { + parserInput.forget(); + return; + } + + parserInput.restore(); + const color = tree.Color.fromKeyword(k); + + if (color) { + parserInput.$str(k); + return color; + } + }, + // + // A Dimension, that is, a number and a unit + // + // 0.5em 95% + // + dimension: function dimension() { + if (parserInput.peekNotNumeric()) { + return; + } + + const value = parserInput.$re(/^([+-]?\d*\.?\d+)(%|[a-z_]+)?/i); + + if (value) { + return new tree.Dimension(value[1], value[2]); + } + }, + // + // A unicode descriptor, as is used in unicode-range + // + // U+0?? or U+00A1-00A9 + // + unicodeDescriptor: function unicodeDescriptor() { + let ud; + ud = parserInput.$re(/^U\+[0-9a-fA-F?]+(\-[0-9a-fA-F?]+)?/); + + if (ud) { + return new tree.UnicodeDescriptor(ud[0]); + } + }, + // + // JavaScript code to be evaluated + // + // `window.location.href` + // + javascript: function javascript() { + let js; + const index = parserInput.i; + parserInput.save(); + const escape = parserInput.$char('~'); + const jsQuote = parserInput.$char('`'); + + if (!jsQuote) { + parserInput.restore(); + return; + } + + js = parserInput.$re(/^[^`]*`/); + + if (js) { + parserInput.forget(); + return new tree.JavaScript(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo); + } + + parserInput.restore('invalid javascript definition'); + } + }, + // + // The variable part of a variable definition. Used in the `rule` parser + // + // @fink: + // + variable: function variable() { + let name; + + if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\w-]+)\s*:/))) { + return name[1]; + } + }, + // + // Call a variable value to retrieve a detached ruleset + // or a value from a detached ruleset's rules. + // + // @fink(); + // @fink; + // color: @fink[@color]; + // + variableCall: function variableCall(parsedName) { + let lookups; + let important; + const i = parserInput.i; + const inValue = !!parsedName; + let name = parsedName; + parserInput.save(); + + if (name || parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\w-]+)(\(\s*\))?/))) { + lookups = this.mixin.ruleLookups(); + + if (!lookups && (inValue && parserInput.$str('()') !== '()' || name[2] !== '()')) { + parserInput.restore('Missing \'[...]\' lookup in variable call'); + return; + } + + if (!inValue) { + name = name[1]; + } + + if (lookups && parsers.important()) { + important = true; + } + + const call = new tree.VariableCall(name, i, fileInfo); + + if (!inValue && parsers.end()) { + parserInput.forget(); + return call; + } else { + parserInput.forget(); + return new tree.NamespaceValue(call, lookups, important, i, fileInfo); + } + } + + parserInput.restore(); + }, + // + // extend syntax - used to extend selectors + // + extend: function extend(isRule) { + let elements; + let e; + const index = parserInput.i; + let option; + let extendList; + let extend; + + if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) { + return; + } + + do { + option = null; + elements = null; + + while (!(option = parserInput.$re(/^(all)(?=\s*(\)|,))/))) { + e = this.element(); + + if (!e) { + break; + } + + if (elements) { + elements.push(e); + } else { + elements = [e]; + } + } + + option = option && option[1]; + + if (!elements) { + error('Missing target selector for :extend().'); + } + + extend = new tree.Extend(new tree.Selector(elements), option, index, fileInfo); + + if (extendList) { + extendList.push(extend); + } else { + extendList = [extend]; + } + } while (parserInput.$char(',')); + + expect(/^\)/); + + if (isRule) { + expect(/^;/); + } + + return extendList; + }, + // + // extendRule - used in a rule to extend all the parent selectors + // + extendRule: function extendRule() { + return this.extend(true); + }, + // + // Mixins + // + mixin: { + // + // A Mixin call, with an optional argument list + // + // #mixins > .square(#fff); + // #mixins.square(#fff); + // .rounded(4px, black); + // .button; + // + // We can lookup / return a value using the lookup syntax: + // + // color: #mixin.square(#fff)[@color]; + // + // The `while` loop is there because mixins can be + // namespaced, but we only support the child and descendant + // selector for now. + // + call: function call(inValue, getLookup) { + const s = parserInput.currentChar(); + let important = false; + let lookups; + const index = parserInput.i; + let elements; + let args; + let hasParens; + + if (s !== '.' && s !== '#') { + return; + } + + parserInput.save(); // stop us absorbing part of an invalid selector + + elements = this.elements(); + + if (elements) { + if (parserInput.$char('(')) { + args = this.args(true).args; + expectChar(')'); + hasParens = true; + } + + if (getLookup !== false) { + lookups = this.ruleLookups(); + } + + if (getLookup === true && !lookups) { + parserInput.restore(); + return; + } + + if (inValue && !lookups && !hasParens) { + // This isn't a valid in-value mixin call + parserInput.restore(); + return; + } + + if (!inValue && parsers.important()) { + important = true; + } + + if (inValue || parsers.end()) { + parserInput.forget(); + const mixin = new tree.mixin.Call(elements, args, index, fileInfo, !lookups && important); + + if (lookups) { + return new tree.NamespaceValue(mixin, lookups, important); + } else { + return mixin; + } + } + } + + parserInput.restore(); + }, + + /** + * Matching elements for mixins + * (Start with . or # and can have > ) + */ + elements: function elements() { + let elements; + let e; + let c; + let elem; + let elemIndex; + const re = /^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/; + + while (true) { + elemIndex = parserInput.i; + e = parserInput.$re(re); + + if (!e) { + break; + } + + elem = new tree.Element(c, e, false, elemIndex, fileInfo); + + if (elements) { + elements.push(elem); + } else { + elements = [elem]; + } + + c = parserInput.$char('>'); + } + + return elements; + }, + args: function args(isCall) { + const entities = parsers.entities; + const returner = { + args: null, + variadic: false + }; + let expressions = []; + const argsSemiColon = []; + const argsComma = []; + let isSemiColonSeparated; + let expressionContainsNamed; + let name; + let nameLoop; + let value; + let arg; + let expand; + let hasSep = true; + parserInput.save(); + + while (true) { + if (isCall) { + arg = parsers.detachedRuleset() || parsers.expression(); + } else { + parserInput.commentStore.length = 0; + + if (parserInput.$str('...')) { + returner.variadic = true; + + if (parserInput.$char(';') && !isSemiColonSeparated) { + isSemiColonSeparated = true; + } + + (isSemiColonSeparated ? argsSemiColon : argsComma).push({ + variadic: true + }); + break; + } + + arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true); + } + + if (!arg || !hasSep) { + break; + } + + nameLoop = null; + + if (arg.throwAwayComments) { + arg.throwAwayComments(); + } + + value = arg; + let val = null; + + if (isCall) { + // Variable + if (arg.value && arg.value.length == 1) { + val = arg.value[0]; + } + } else { + val = arg; + } + + if (val && (val instanceof tree.Variable || val instanceof tree.Property)) { + if (parserInput.$char(':')) { + if (expressions.length > 0) { + if (isSemiColonSeparated) { + error('Cannot mix ; and , as delimiter types'); + } + + expressionContainsNamed = true; + } + + value = parsers.detachedRuleset() || parsers.expression(); + + if (!value) { + if (isCall) { + error('could not understand value for named argument'); + } else { + parserInput.restore(); + returner.args = []; + return returner; + } + } + + nameLoop = name = val.name; + } else if (parserInput.$str('...')) { + if (!isCall) { + returner.variadic = true; + + if (parserInput.$char(';') && !isSemiColonSeparated) { + isSemiColonSeparated = true; + } + + (isSemiColonSeparated ? argsSemiColon : argsComma).push({ + name: arg.name, + variadic: true + }); + break; + } else { + expand = true; + } + } else if (!isCall) { + name = nameLoop = val.name; + value = null; + } + } + + if (value) { + expressions.push(value); + } + + argsComma.push({ + name: nameLoop, + value, + expand + }); + + if (parserInput.$char(',')) { + hasSep = true; + continue; + } + + hasSep = parserInput.$char(';') === ';'; + + if (hasSep || isSemiColonSeparated) { + if (expressionContainsNamed) { + error('Cannot mix ; and , as delimiter types'); + } + + isSemiColonSeparated = true; + + if (expressions.length > 1) { + value = new tree.Value(expressions); + } + + argsSemiColon.push({ + name, + value, + expand + }); + name = null; + expressions = []; + expressionContainsNamed = false; + } + } + + parserInput.forget(); + returner.args = isSemiColonSeparated ? argsSemiColon : argsComma; + return returner; + }, + // + // A Mixin definition, with a list of parameters + // + // .rounded (@radius: 2px, @color) { + // ... + // } + // + // Until we have a finer grained state-machine, we have to + // do a look-ahead, to make sure we don't have a mixin call. + // See the `rule` function for more information. + // + // We start by matching `.rounded (`, and then proceed on to + // the argument list, which has optional default values. + // We store the parameters in `params`, with a `value` key, + // if there is a value, such as in the case of `@radius`. + // + // Once we've got our params list, and a closing `)`, we parse + // the `{...}` block. + // + definition: function definition() { + let name; + let params = []; + let match; + let ruleset; + let cond; + let variadic = false; + + if (parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#' || parserInput.peek(/^[^{]*\}/)) { + return; + } + + parserInput.save(); + match = parserInput.$re(/^([#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/); + + if (match) { + name = match[1]; + const argInfo = this.args(false); + params = argInfo.args; + variadic = argInfo.variadic; // .mixincall("@{a}"); + // looks a bit like a mixin definition.. + // also + // .mixincall(@a: {rule: set;}); + // so we have to be nice and restore + + if (!parserInput.$char(')')) { + parserInput.restore('Missing closing \')\''); + return; + } + + parserInput.commentStore.length = 0; + + if (parserInput.$str('when')) { + // Guard + cond = expect(parsers.conditions, 'expected condition'); + } + + ruleset = parsers.block(); + + if (ruleset) { + parserInput.forget(); + return new tree.mixin.Definition(name, params, ruleset, cond, variadic); + } else { + parserInput.restore(); + } + } else { + parserInput.forget(); + } + }, + ruleLookups: function ruleLookups() { + let rule; + const lookups = []; + + if (parserInput.currentChar() !== '[') { + return; + } + + while (true) { + parserInput.save(); + rule = this.lookupValue(); + + if (!rule && rule !== '') { + parserInput.restore(); + break; + } + + lookups.push(rule); + parserInput.forget(); + } + + if (lookups.length > 0) { + return lookups; + } + }, + lookupValue: function lookupValue() { + parserInput.save(); + + if (!parserInput.$char('[')) { + parserInput.restore(); + return; + } + + const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/); + + if (!parserInput.$char(']')) { + parserInput.restore(); + return; + } + + if (name || name === '') { + parserInput.forget(); + return name; + } + + parserInput.restore(); + } + }, + // + // Entities are the smallest recognized token, + // and can be found inside a rule's value. + // + entity: function entity() { + const entities = this.entities; + return this.comment() || entities.literal() || entities.variable() || entities.url() || entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) || entities.javascript(); + }, + // + // A Declaration terminator. Note that we use `peek()` to check for '}', + // because the `block` rule will be expecting it, but we still need to make sure + // it's there, if ';' was omitted. + // + end: function end() { + return parserInput.$char(';') || parserInput.peek('}'); + }, + // + // IE's alpha function + // + // alpha(opacity=88) + // + ieAlpha: function ieAlpha() { + let value; // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18 + + if (!parserInput.$re(/^opacity=/i)) { + return; + } + + value = parserInput.$re(/^\d+/); + + if (!value) { + value = expect(parsers.entities.variable, 'Could not parse alpha'); + value = `@{${value.name.slice(1)}}`; + } + + expectChar(')'); + return new tree.Quoted('', `alpha(opacity=${value})`); + }, + // + // A Selector Element + // + // div + // + h1 + // #socks + // input[type="text"] + // + // Elements are the building blocks for Selectors, + // they are made out of a `Combinator` (see combinator rule), + // and an element name, such as a tag a class, or `*`. + // + element: function element() { + let e; + let c; + let v; + const index = parserInput.i; + c = this.combinator(); + e = parserInput.$re(/^(?:\d+\.\d+|\d+)%/) || parserInput.$re(/^(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) || parserInput.$char('*') || parserInput.$char('&') || this.attribute() || parserInput.$re(/^\([^&()@]+\)/) || parserInput.$re(/^[\.#:](?=@)/) || this.entities.variableCurly(); + + if (!e) { + parserInput.save(); + + if (parserInput.$char('(')) { + if ((v = this.selector(false)) && parserInput.$char(')')) { + e = new tree.Paren(v); + parserInput.forget(); + } else { + parserInput.restore('Missing closing \')\''); + } + } else { + parserInput.forget(); + } + } + + if (e) { + return new tree.Element(c, e, e instanceof tree.Variable, index, fileInfo); + } + }, + // + // Combinators combine elements together, in a Selector. + // + // Because our parser isn't white-space sensitive, special care + // has to be taken, when parsing the descendant combinator, ` `, + // as it's an empty space. We have to check the previous character + // in the input, to see if it's a ` ` character. More info on how + // we deal with this in *combinator.js*. + // + combinator: function combinator() { + let c = parserInput.currentChar(); + + if (c === '/') { + parserInput.save(); + const slashedCombinator = parserInput.$re(/^\/[a-z]+\//i); + + if (slashedCombinator) { + parserInput.forget(); + return new tree.Combinator(slashedCombinator); + } + + parserInput.restore(); + } + + if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') { + parserInput.i++; + + if (c === '^' && parserInput.currentChar() === '^') { + c = '^^'; + parserInput.i++; + } + + while (parserInput.isWhitespace()) { + parserInput.i++; + } + + return new tree.Combinator(c); + } else if (parserInput.isWhitespace(-1)) { + return new tree.Combinator(' '); + } else { + return new tree.Combinator(null); + } + }, + // + // A CSS Selector + // with less extensions e.g. the ability to extend and guard + // + // .class > div + h1 + // li a:hover + // + // Selectors are made out of one or more Elements, see above. + // + selector: function selector(isLess) { + const index = parserInput.i; + let elements; + let extendList; + let c; + let e; + let allExtends; + let when; + let condition; + isLess = isLess !== false; + + while (isLess && (extendList = this.extend()) || isLess && (when = parserInput.$str('when')) || (e = this.element())) { + if (when) { + condition = expect(this.conditions, 'expected condition'); + } else if (condition) { + error('CSS guard can only be used at the end of selector'); + } else if (extendList) { + if (allExtends) { + allExtends = allExtends.concat(extendList); + } else { + allExtends = extendList; + } + } else { + if (allExtends) { + error('Extend can only be used at the end of selector'); + } + + c = parserInput.currentChar(); + + if (elements) { + elements.push(e); + } else { + elements = [e]; + } + + e = null; + } + + if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') { + break; + } + } + + if (elements) { + return new tree.Selector(elements, allExtends, condition, index, fileInfo); + } + + if (allExtends) { + error('Extend must be used to extend a selector, it cannot be used on its own'); + } + }, + selectors: function selectors() { + let s; + let selectors; + + while (true) { + s = this.selector(); + + if (!s) { + break; + } + + if (selectors) { + selectors.push(s); + } else { + selectors = [s]; + } + + parserInput.commentStore.length = 0; + + if (s.condition && selectors.length > 1) { + error("Guards are only currently allowed on a single selector."); + } + + if (!parserInput.$char(',')) { + break; + } + + if (s.condition) { + error("Guards are only currently allowed on a single selector."); + } + + parserInput.commentStore.length = 0; + } + + return selectors; + }, + attribute: function attribute() { + if (!parserInput.$char('[')) { + return; + } + + const entities = this.entities; + let key; + let val; + let op; + + if (!(key = entities.variableCurly())) { + key = expect(/^(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\.)+/); + } + + op = parserInput.$re(/^[|~*$^]?=/); + + if (op) { + val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\w-]+/) || entities.variableCurly(); + } + + expectChar(']'); + return new tree.Attribute(key, op, val); + }, + // + // The `block` rule is used by `ruleset` and `mixin.definition`. + // It's a wrapper around the `primary` rule, with added `{}`. + // + block: function block() { + let content; + + if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) { + return content; + } + }, + blockRuleset: function blockRuleset() { + let block = this.block(); + + if (block) { + block = new tree.Ruleset(null, block); + } + + return block; + }, + detachedRuleset: function detachedRuleset() { + let argInfo; + let params; + let variadic; + parserInput.save(); + + if (parserInput.$re(/^[.#]\(/)) { + /** + * DR args currently only implemented for each() function, and not + * yet settable as `@dr: #(@arg) {}` + * This should be done when DRs are merged with mixins. + * See: https://github.com/less/less-meta/issues/16 + */ + argInfo = this.mixin.args(false); + params = argInfo.args; + variadic = argInfo.variadic; + + if (!parserInput.$char(')')) { + parserInput.restore(); + return; + } + } + + const blockRuleset = this.blockRuleset(); + + if (blockRuleset) { + parserInput.forget(); + + if (params) { + return new tree.mixin.Definition(null, params, blockRuleset, null, variadic); + } + + return new tree.DetachedRuleset(blockRuleset); + } + + parserInput.restore(); + }, + // + // div, .class, body > p {...} + // + ruleset: function ruleset() { + let selectors; + let rules; + let debugInfo; + parserInput.save(); + + if (context.dumpLineNumbers) { + debugInfo = getDebugInfo(parserInput.i); + } + + selectors = this.selectors(); + + if (selectors && (rules = this.block())) { + parserInput.forget(); + const ruleset = new tree.Ruleset(selectors, rules, context.strictImports); + + if (context.dumpLineNumbers) { + ruleset.debugInfo = debugInfo; + } + + return ruleset; + } else { + parserInput.restore(); + } + }, + declaration: function declaration() { + let name; + let value; + const index = parserInput.i; + let hasDR; + const c = parserInput.currentChar(); + let important; + let merge; + let isVariable; + + if (c === '.' || c === '#' || c === '&' || c === ':') { + return; + } + + parserInput.save(); + name = this.variable() || this.ruleProperty(); + + if (name) { + isVariable = typeof name === 'string'; + + if (isVariable) { + value = this.detachedRuleset(); + + if (value) { + hasDR = true; + } + } + + parserInput.commentStore.length = 0; + + if (!value) { + // a name returned by this.ruleProperty() is always an array of the form: + // [string-1, ..., string-n, ""] or [string-1, ..., string-n, "+"] + // where each item is a tree.Keyword or tree.Variable + merge = !isVariable && name.length > 1 && name.pop().value; // Custom property values get permissive parsing + + if (name[0].value && name[0].value.slice(0, 2) === '--') { + value = this.permissiveValue(); + } // Try to store values as anonymous + // If we need the value later we'll re-parse it in ruleset.parseValue + else { + value = this.anonymousValue(); + } + + if (value) { + parserInput.forget(); // anonymous values absorb the end ';' which is required for them to work + + return new tree.Declaration(name, value, false, merge, index, fileInfo); + } + + if (!value) { + value = this.value(); + } + + if (value) { + important = this.important(); + } else if (isVariable) { + // As a last resort, try permissiveValue + value = this.permissiveValue(); + } + } + + if (value && (this.end() || hasDR)) { + parserInput.forget(); + return new tree.Declaration(name, value, important, merge, index, fileInfo); + } else { + parserInput.restore(); + } + } else { + parserInput.restore(); + } + }, + anonymousValue: function anonymousValue() { + const index = parserInput.i; + const match = parserInput.$re(/^([^.#@\$+\/'"*`(;{}-]*);/); + + if (match) { + return new tree.Anonymous(match[1], index); + } + }, + + /** + * Used for custom properties, at-rules, and variables (as fallback) + * Parses almost anything inside of {} [] () "" blocks + * until it reaches outer-most tokens. + * + * First, it will try to parse comments and entities to reach + * the end. This is mostly like the Expression parser except no + * math is allowed. + */ + permissiveValue: function permissiveValue(untilTokens) { + let i; + let e; + let done; + let value; + const tok = untilTokens || ';'; + const index = parserInput.i; + const result = []; + + function testCurrentChar() { + const char = parserInput.currentChar(); + + if (typeof tok === 'string') { + return char === tok; + } else { + return tok.test(char); + } + } + + if (testCurrentChar()) { + return; + } + + value = []; + + do { + e = this.comment(); + + if (e) { + value.push(e); + continue; + } + + e = this.entity(); + + if (e) { + value.push(e); + } + } while (e); + + done = testCurrentChar(); + + if (value.length > 0) { + value = new tree.Expression(value); + + if (done) { + return value; + } else { + result.push(value); + } // Preserve space before $parseUntil as it will not + + + if (parserInput.prevChar() === ' ') { + result.push(new tree.Anonymous(' ', index)); + } + } + + parserInput.save(); + value = parserInput.$parseUntil(tok); + + if (value) { + if (typeof value === 'string') { + error(`Expected '${value}'`, 'Parse'); + } + + if (value.length === 1 && value[0] === ' ') { + parserInput.forget(); + return new tree.Anonymous('', index); + } + + let item; + + for (i = 0; i < value.length; i++) { + item = value[i]; + + if (Array.isArray(item)) { + // Treat actual quotes as normal quoted values + result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo)); + } else { + if (i === value.length - 1) { + item = item.trim(); + } // Treat like quoted values, but replace vars like unquoted expressions + + + const quote = new tree.Quoted('\'', item, true, index, fileInfo); + quote.variableRegex = /@([\w-]+)/g; + quote.propRegex = /\$([\w-]+)/g; + result.push(quote); + } + } + + parserInput.forget(); + return new tree.Expression(result, true); + } + + parserInput.restore(); + }, + // + // An @import atrule + // + // @import "lib"; + // + // Depending on our environment, importing is done differently: + // In the browser, it's an XHR request, in Node, it would be a + // file-system operation. The function used for importing is + // stored in `import`, which we pass to the Import constructor. + // + 'import': function _import() { + let path; + let features; + const index = parserInput.i; + const dir = parserInput.$re(/^@import?\s+/); + + if (dir) { + const options = (dir ? this.importOptions() : null) || {}; + + if (path = this.entities.quoted() || this.entities.url()) { + features = this.mediaFeatures(); + + if (!parserInput.$char(';')) { + parserInput.i = index; + error('missing semi-colon or unrecognised media features on import'); + } + + features = features && new tree.Value(features); + return new tree.Import(path, features, options, index, fileInfo); + } else { + parserInput.i = index; + error('malformed import statement'); + } + } + }, + importOptions: function importOptions() { + let o; + const options = {}; + let optionName; + let value; // list of options, surrounded by parens + + if (!parserInput.$char('(')) { + return null; + } + + do { + o = this.importOption(); + + if (o) { + optionName = o; + value = true; + + switch (optionName) { + case 'css': + optionName = 'less'; + value = false; + break; + + case 'once': + optionName = 'multiple'; + value = false; + break; + } + + options[optionName] = value; + + if (!parserInput.$char(',')) { + break; + } + } + } while (o); + + expectChar(')'); + return options; + }, + importOption: function importOption() { + const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/); + + if (opt) { + return opt[1]; + } + }, + mediaFeature: function mediaFeature() { + const entities = this.entities; + const nodes = []; + let e; + let p; + parserInput.save(); + + do { + e = entities.keyword() || entities.variable() || entities.mixinLookup(); + + if (e) { + nodes.push(e); + } else if (parserInput.$char('(')) { + p = this.property(); + e = this.value(); + + if (parserInput.$char(')')) { + if (p && e) { + nodes.push(new tree.Paren(new tree.Declaration(p, e, null, null, parserInput.i, fileInfo, true))); + } else if (e) { + nodes.push(new tree.Paren(e)); + } else { + error('badly formed media feature definition'); + } + } else { + error('Missing closing \')\'', 'Parse'); + } + } + } while (e); + + parserInput.forget(); + + if (nodes.length > 0) { + return new tree.Expression(nodes); + } + }, + mediaFeatures: function mediaFeatures() { + const entities = this.entities; + const features = []; + let e; + + do { + e = this.mediaFeature(); + + if (e) { + features.push(e); + + if (!parserInput.$char(',')) { + break; + } + } else { + e = entities.variable() || entities.mixinLookup(); + + if (e) { + features.push(e); + + if (!parserInput.$char(',')) { + break; + } + } + } + } while (e); + + return features.length > 0 ? features : null; + }, + media: function media() { + let features; + let rules; + let media; + let debugInfo; + const index = parserInput.i; + + if (context.dumpLineNumbers) { + debugInfo = getDebugInfo(index); + } + + parserInput.save(); + + if (parserInput.$str('@media')) { + features = this.mediaFeatures(); + rules = this.block(); + + if (!rules) { + error('media definitions require block statements after any features'); + } + + parserInput.forget(); + media = new tree.Media(rules, features, index, fileInfo); + + if (context.dumpLineNumbers) { + media.debugInfo = debugInfo; + } + + return media; + } + + parserInput.restore(); + }, + // + // A @plugin directive, used to import plugins dynamically. + // + // @plugin (args) "lib"; + // + plugin: function plugin() { + let path; + let args; + let options; + const index = parserInput.i; + const dir = parserInput.$re(/^@plugin?\s+/); + + if (dir) { + args = this.pluginArgs(); + + if (args) { + options = { + pluginArgs: args, + isPlugin: true + }; + } else { + options = { + isPlugin: true + }; + } + + if (path = this.entities.quoted() || this.entities.url()) { + if (!parserInput.$char(';')) { + parserInput.i = index; + error('missing semi-colon on @plugin'); + } + + return new tree.Import(path, null, options, index, fileInfo); + } else { + parserInput.i = index; + error('malformed @plugin statement'); + } + } + }, + pluginArgs: function pluginArgs() { + // list of options, surrounded by parens + parserInput.save(); + + if (!parserInput.$char('(')) { + parserInput.restore(); + return null; + } + + const args = parserInput.$re(/^\s*([^\);]+)\)\s*/); + + if (args[1]) { + parserInput.forget(); + return args[1].trim(); + } else { + parserInput.restore(); + return null; + } + }, + // + // A CSS AtRule + // + // @charset "utf-8"; + // + atrule: function atrule() { + const index = parserInput.i; + let name; + let value; + let rules; + let nonVendorSpecificName; + let hasIdentifier; + let hasExpression; + let hasUnknown; + let hasBlock = true; + let isRooted = true; + + if (parserInput.currentChar() !== '@') { + return; + } + + value = this['import']() || this.plugin() || this.media(); + + if (value) { + return value; + } + + parserInput.save(); + name = parserInput.$re(/^@[a-z-]+/); + + if (!name) { + return; + } + + nonVendorSpecificName = name; + + if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) { + nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`; + } + + switch (nonVendorSpecificName) { + case '@charset': + hasIdentifier = true; + hasBlock = false; + break; + + case '@namespace': + hasExpression = true; + hasBlock = false; + break; + + case '@keyframes': + case '@counter-style': + hasIdentifier = true; + break; + + case '@document': + case '@supports': + hasUnknown = true; + isRooted = false; + break; + + default: + hasUnknown = true; + break; + } + + parserInput.commentStore.length = 0; + + if (hasIdentifier) { + value = this.entity(); + + if (!value) { + error(`expected ${name} identifier`); + } + } else if (hasExpression) { + value = this.expression(); + + if (!value) { + error(`expected ${name} expression`); + } + } else if (hasUnknown) { + value = this.permissiveValue(/^[{;]/); + hasBlock = parserInput.currentChar() === '{'; + + if (!value) { + if (!hasBlock && parserInput.currentChar() !== ';') { + error(`${name} rule is missing block or ending semi-colon`); + } + } else if (!value.value) { + value = null; + } + } + + if (hasBlock) { + rules = this.blockRuleset(); + } + + if (rules || !hasBlock && value && parserInput.$char(';')) { + parserInput.forget(); + return new tree.AtRule(name, value, rules, index, fileInfo, context.dumpLineNumbers ? getDebugInfo(index) : null, isRooted); + } + + parserInput.restore('at-rule options not recognised'); + }, + // + // A Value is a comma-delimited list of Expressions + // + // font-family: Baskerville, Georgia, serif; + // + // In a Rule, a Value represents everything after the `:`, + // and before the `;`. + // + value: function value() { + let e; + const expressions = []; + const index = parserInput.i; + + do { + e = this.expression(); + + if (e) { + expressions.push(e); + + if (!parserInput.$char(',')) { + break; + } + } + } while (e); + + if (expressions.length > 0) { + return new tree.Value(expressions, index); + } + }, + important: function important() { + if (parserInput.currentChar() === '!') { + return parserInput.$re(/^! *important/); + } + }, + sub: function sub() { + let a; + let e; + parserInput.save(); + + if (parserInput.$char('(')) { + a = this.addition(); + + if (a && parserInput.$char(')')) { + parserInput.forget(); + e = new tree.Expression([a]); + e.parens = true; + return e; + } + + parserInput.restore('Expected \')\''); + return; + } + + parserInput.restore(); + }, + multiplication: function multiplication() { + let m; + let a; + let op; + let operation; + let isSpaced; + m = this.operand(); + + if (m) { + isSpaced = parserInput.isWhitespace(-1); + + while (true) { + if (parserInput.peek(/^\/[*\/]/)) { + break; + } + + parserInput.save(); + op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./'); + + if (!op) { + parserInput.forget(); + break; + } + + a = this.operand(); + + if (!a) { + parserInput.restore(); + break; + } + + parserInput.forget(); + m.parensInOp = true; + a.parensInOp = true; + operation = new tree.Operation(op, [operation || m, a], isSpaced); + isSpaced = parserInput.isWhitespace(-1); + } + + return operation || m; + } + }, + addition: function addition() { + let m; + let a; + let op; + let operation; + let isSpaced; + m = this.multiplication(); + + if (m) { + isSpaced = parserInput.isWhitespace(-1); + + while (true) { + op = parserInput.$re(/^[-+]\s+/) || !isSpaced && (parserInput.$char('+') || parserInput.$char('-')); + + if (!op) { + break; + } + + a = this.multiplication(); + + if (!a) { + break; + } + + m.parensInOp = true; + a.parensInOp = true; + operation = new tree.Operation(op, [operation || m, a], isSpaced); + isSpaced = parserInput.isWhitespace(-1); + } + + return operation || m; + } + }, + conditions: function conditions() { + let a; + let b; + const index = parserInput.i; + let condition; + a = this.condition(true); + + if (a) { + while (true) { + if (!parserInput.peek(/^,\s*(not\s*)?\(/) || !parserInput.$char(',')) { + break; + } + + b = this.condition(true); + + if (!b) { + break; + } + + condition = new tree.Condition('or', condition || a, b, index); + } + + return condition || a; + } + }, + condition: function condition(needsParens) { + let result; + let logical; + let next; + + function or() { + return parserInput.$str('or'); + } + + result = this.conditionAnd(needsParens); + + if (!result) { + return; + } + + logical = or(); + + if (logical) { + next = this.condition(needsParens); + + if (next) { + result = new tree.Condition(logical, result, next); + } else { + return; + } + } + + return result; + }, + conditionAnd: function conditionAnd(needsParens) { + let result; + let logical; + let next; + const self = this; + + function insideCondition() { + const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens); + + if (!cond && !needsParens) { + return self.atomicCondition(needsParens); + } + + return cond; + } + + function and() { + return parserInput.$str('and'); + } + + result = insideCondition(); + + if (!result) { + return; + } + + logical = and(); + + if (logical) { + next = this.conditionAnd(needsParens); + + if (next) { + result = new tree.Condition(logical, result, next); + } else { + return; + } + } + + return result; + }, + negatedCondition: function negatedCondition(needsParens) { + if (parserInput.$str('not')) { + const result = this.parenthesisCondition(needsParens); + + if (result) { + result.negate = !result.negate; + } + + return result; + } + }, + parenthesisCondition: function parenthesisCondition(needsParens) { + function tryConditionFollowedByParenthesis(me) { + let body; + parserInput.save(); + body = me.condition(needsParens); + + if (!body) { + parserInput.restore(); + return; + } + + if (!parserInput.$char(')')) { + parserInput.restore(); + return; + } + + parserInput.forget(); + return body; + } + + let body; + parserInput.save(); + + if (!parserInput.$str('(')) { + parserInput.restore(); + return; + } + + body = tryConditionFollowedByParenthesis(this); + + if (body) { + parserInput.forget(); + return body; + } + + body = this.atomicCondition(needsParens); + + if (!body) { + parserInput.restore(); + return; + } + + if (!parserInput.$char(')')) { + parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`); + return; + } + + parserInput.forget(); + return body; + }, + atomicCondition: function atomicCondition(needsParens) { + const entities = this.entities; + const index = parserInput.i; + let a; + let b; + let c; + let op; + + function cond() { + return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup(); + } + + cond = cond.bind(this); + a = cond(); + + if (a) { + if (parserInput.$char('>')) { + if (parserInput.$char('=')) { + op = '>='; + } else { + op = '>'; + } + } else if (parserInput.$char('<')) { + if (parserInput.$char('=')) { + op = '<='; + } else { + op = '<'; + } + } else if (parserInput.$char('=')) { + if (parserInput.$char('>')) { + op = '=>'; + } else if (parserInput.$char('<')) { + op = '=<'; + } else { + op = '='; + } + } + + if (op) { + b = cond(); + + if (b) { + c = new tree.Condition(op, a, b, index, false); + } else { + error('expected expression'); + } + } else { + c = new tree.Condition('=', a, new tree.Keyword('true'), index, false); + } + + return c; + } + }, + // + // An operand is anything that can be part of an operation, + // such as a Color, or a Variable + // + operand: function operand() { + const entities = this.entities; + let negate; + + if (parserInput.peek(/^-[@\$\(]/)) { + negate = parserInput.$char('-'); + } + + let o = this.sub() || entities.dimension() || entities.color() || entities.variable() || entities.property() || entities.call() || entities.quoted(true) || entities.colorKeyword() || entities.mixinLookup(); + + if (negate) { + o.parensInOp = true; + o = new tree.Negative(o); + } + + return o; + }, + // + // Expressions either represent mathematical operations, + // or white-space delimited Entities. + // + // 1px solid black + // @var * 2 + // + expression: function expression() { + const entities = []; + let e; + let delim; + const index = parserInput.i; + + do { + e = this.comment(); + + if (e) { + entities.push(e); + continue; + } + + e = this.addition() || this.entity(); + + if (e) { + entities.push(e); // operations do not allow keyword "/" dimension (e.g. small/20px) so we support that here + + if (!parserInput.peek(/^\/[\/*]/)) { + delim = parserInput.$char('/'); + + if (delim) { + entities.push(new tree.Anonymous(delim, index)); + } + } + } + } while (e); + + if (entities.length > 0) { + return new tree.Expression(entities); + } + }, + property: function property() { + const name = parserInput.$re(/^(\*?-?[_a-zA-Z0-9-]+)\s*:/); + + if (name) { + return name[1]; + } + }, + ruleProperty: function ruleProperty() { + let name = []; + const index = []; + let s; + let k; + parserInput.save(); + const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\s*:/); + + if (simpleProperty) { + name = [new tree.Keyword(simpleProperty[1])]; + parserInput.forget(); + return name; + } + + function match(re) { + const i = parserInput.i; + const chunk = parserInput.$re(re); + + if (chunk) { + index.push(i); + return name.push(chunk[1]); + } + } + + match(/^(\*?)/); + + while (true) { + if (!match(/^((?:[\w-]+)|(?:[@\$]\{[\w-]+\}))/)) { + break; + } + } + + if (name.length > 1 && match(/^((?:\+_|\+)?)\s*:/)) { + parserInput.forget(); // at last, we have the complete match now. move forward, + // convert name particles to tree objects and return: + + if (name[0] === '') { + name.shift(); + index.shift(); + } + + for (k = 0; k < name.length; k++) { + s = name[k]; + name[k] = s.charAt(0) !== '@' && s.charAt(0) !== '$' ? new tree.Keyword(s) : s.charAt(0) === '@' ? new tree.Variable(`@${s.slice(2, -1)}`, index[k], fileInfo) : new tree.Property(`$${s.slice(2, -1)}`, index[k], fileInfo); + } + + return name; + } + + parserInput.restore(); + } + } + }; +}; + +Parser.serializeVars = vars => { + let s = ''; + + for (const name in vars) { + if (Object.hasOwnProperty.call(vars, name)) { + const value = vars[name]; + s += `${(name[0] === '@' ? '' : '@') + name}: ${value}${String(value).slice(-1) === ';' ? '' : ';'}`; + } + } + + return s; +}; + +function boolean(condition) { + return condition ? Keyword.True : Keyword.False; +} + +function If(condition, trueValue, falseValue) { + return condition ? trueValue : falseValue || new Anonymous(); +} + +var boolean$1 = { + boolean, + 'if': If +}; + +let colorFunctions; + +function clamp$1(val) { + return Math.min(1, Math.max(0, val)); +} + +function hsla(origColor, hsl) { + const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a); + + if (color) { + if (origColor.value && /^(rgb|hsl)/.test(origColor.value)) { + color.value = origColor.value; + } else { + color.value = 'rgb'; + } + + return color; + } +} + +function toHSL(color) { + if (color.toHSL) { + return color.toHSL(); + } else { + throw new Error('Argument cannot be evaluated to a color'); + } +} + +function toHSV(color) { + if (color.toHSV) { + return color.toHSV(); + } else { + throw new Error('Argument cannot be evaluated to a color'); + } +} + +function number(n) { + if (n instanceof Dimension) { + return parseFloat(n.unit.is('%') ? n.value / 100 : n.value); + } else if (typeof n === 'number') { + return n; + } else { + throw { + type: 'Argument', + message: 'color functions take numbers as parameters' + }; + } +} + +function scaled(n, size) { + if (n instanceof Dimension && n.unit.is('%')) { + return parseFloat(n.value * size / 100); + } else { + return number(n); + } +} + +colorFunctions = { + rgb: function rgb(r, g, b) { + const color = colorFunctions.rgba(r, g, b, 1.0); + + if (color) { + color.value = 'rgb'; + return color; + } + }, + rgba: function rgba(r, g, b, a) { + try { + if (r instanceof Color) { + if (g) { + a = number(g); + } else { + a = r.alpha; + } + + return new Color(r.rgb, a, 'rgba'); + } + + const rgb = [r, g, b].map(c => scaled(c, 255)); + a = number(a); + return new Color(rgb, a, 'rgba'); + } catch (e) {} + }, + hsl: function hsl(h, s, l) { + const color = colorFunctions.hsla(h, s, l, 1.0); + + if (color) { + color.value = 'hsl'; + return color; + } + }, + hsla: function hsla(h, s, l, a) { + try { + if (h instanceof Color) { + if (s) { + a = number(s); + } else { + a = h.alpha; + } + + return new Color(h.rgb, a, 'hsla'); + } + + let m1; + let m2; + + function hue(h) { + h = h < 0 ? h + 1 : h > 1 ? h - 1 : h; + + if (h * 6 < 1) { + return m1 + (m2 - m1) * h * 6; + } else if (h * 2 < 1) { + return m2; + } else if (h * 3 < 2) { + return m1 + (m2 - m1) * (2 / 3 - h) * 6; + } else { + return m1; + } + } + + h = number(h) % 360 / 360; + s = clamp$1(number(s)); + l = clamp$1(number(l)); + a = clamp$1(number(a)); + m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s; + m1 = l * 2 - m2; + const rgb = [hue(h + 1 / 3) * 255, hue(h) * 255, hue(h - 1 / 3) * 255]; + a = number(a); + return new Color(rgb, a, 'hsla'); + } catch (e) {} + }, + hsv: function hsv(h, s, v) { + return colorFunctions.hsva(h, s, v, 1.0); + }, + hsva: function hsva(h, s, v, a) { + h = number(h) % 360 / 360 * 360; + s = number(s); + v = number(v); + a = number(a); + let i; + let f; + i = Math.floor(h / 60 % 6); + f = h / 60 - i; + const vs = [v, v * (1 - s), v * (1 - f * s), v * (1 - (1 - f) * s)]; + const perm = [[0, 3, 1], [2, 0, 1], [1, 0, 3], [1, 2, 0], [3, 1, 0], [0, 1, 2]]; + return colorFunctions.rgba(vs[perm[i][0]] * 255, vs[perm[i][1]] * 255, vs[perm[i][2]] * 255, a); + }, + hue: function hue(color) { + return new Dimension(toHSL(color).h); + }, + saturation: function saturation(color) { + return new Dimension(toHSL(color).s * 100, '%'); + }, + lightness: function lightness(color) { + return new Dimension(toHSL(color).l * 100, '%'); + }, + hsvhue: function hsvhue(color) { + return new Dimension(toHSV(color).h); + }, + hsvsaturation: function hsvsaturation(color) { + return new Dimension(toHSV(color).s * 100, '%'); + }, + hsvvalue: function hsvvalue(color) { + return new Dimension(toHSV(color).v * 100, '%'); + }, + red: function red(color) { + return new Dimension(color.rgb[0]); + }, + green: function green(color) { + return new Dimension(color.rgb[1]); + }, + blue: function blue(color) { + return new Dimension(color.rgb[2]); + }, + alpha: function alpha(color) { + return new Dimension(toHSL(color).a); + }, + luma: function luma(color) { + return new Dimension(color.luma() * color.alpha * 100, '%'); + }, + luminance: function luminance(color) { + const luminance = 0.2126 * color.rgb[0] / 255 + 0.7152 * color.rgb[1] / 255 + 0.0722 * color.rgb[2] / 255; + return new Dimension(luminance * color.alpha * 100, '%'); + }, + saturate: function saturate(color, amount, method) { + // filter: saturate(3.2); + // should be kept as is, so check for color + if (!color.rgb) { + return null; + } + + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.s += hsl.s * amount.value / 100; + } else { + hsl.s += amount.value / 100; + } + + hsl.s = clamp$1(hsl.s); + return hsla(color, hsl); + }, + desaturate: function desaturate(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.s -= hsl.s * amount.value / 100; + } else { + hsl.s -= amount.value / 100; + } + + hsl.s = clamp$1(hsl.s); + return hsla(color, hsl); + }, + lighten: function lighten(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.l += hsl.l * amount.value / 100; + } else { + hsl.l += amount.value / 100; + } + + hsl.l = clamp$1(hsl.l); + return hsla(color, hsl); + }, + darken: function darken(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.l -= hsl.l * amount.value / 100; + } else { + hsl.l -= amount.value / 100; + } + + hsl.l = clamp$1(hsl.l); + return hsla(color, hsl); + }, + fadein: function fadein(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.a += hsl.a * amount.value / 100; + } else { + hsl.a += amount.value / 100; + } + + hsl.a = clamp$1(hsl.a); + return hsla(color, hsl); + }, + fadeout: function fadeout(color, amount, method) { + const hsl = toHSL(color); + + if (typeof method !== 'undefined' && method.value === 'relative') { + hsl.a -= hsl.a * amount.value / 100; + } else { + hsl.a -= amount.value / 100; + } + + hsl.a = clamp$1(hsl.a); + return hsla(color, hsl); + }, + fade: function fade(color, amount) { + const hsl = toHSL(color); + hsl.a = amount.value / 100; + hsl.a = clamp$1(hsl.a); + return hsla(color, hsl); + }, + spin: function spin(color, amount) { + const hsl = toHSL(color); + const hue = (hsl.h + amount.value) % 360; + hsl.h = hue < 0 ? 360 + hue : hue; + return hsla(color, hsl); + }, + // + // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein + // http://sass-lang.com + // + mix: function mix(color1, color2, weight) { + if (!weight) { + weight = new Dimension(50); + } + + const p = weight.value / 100.0; + const w = p * 2 - 1; + const a = toHSL(color1).a - toHSL(color2).a; + const w1 = ((w * a == -1 ? w : (w + a) / (1 + w * a)) + 1) / 2.0; + const w2 = 1 - w1; + const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2, color1.rgb[1] * w1 + color2.rgb[1] * w2, color1.rgb[2] * w1 + color2.rgb[2] * w2]; + const alpha = color1.alpha * p + color2.alpha * (1 - p); + return new Color(rgb, alpha); + }, + greyscale: function greyscale(color) { + return colorFunctions.desaturate(color, new Dimension(100)); + }, + contrast: function contrast(color, dark, light, threshold) { + // filter: contrast(3.2); + // should be kept as is, so check for color + if (!color.rgb) { + return null; + } + + if (typeof light === 'undefined') { + light = colorFunctions.rgba(255, 255, 255, 1.0); + } + + if (typeof dark === 'undefined') { + dark = colorFunctions.rgba(0, 0, 0, 1.0); + } // Figure out which is actually light and dark: + + + if (dark.luma() > light.luma()) { + const t = light; + light = dark; + dark = t; + } + + if (typeof threshold === 'undefined') { + threshold = 0.43; + } else { + threshold = number(threshold); + } + + if (color.luma() < threshold) { + return light; + } else { + return dark; + } + }, + // Changes made in 2.7.0 - Reverted in 3.0.0 + // contrast: function (color, color1, color2, threshold) { + // // Return which of `color1` and `color2` has the greatest contrast with `color` + // // according to the standard WCAG contrast ratio calculation. + // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef + // // The threshold param is no longer used, in line with SASS. + // // filter: contrast(3.2); + // // should be kept as is, so check for color + // if (!color.rgb) { + // return null; + // } + // if (typeof color1 === 'undefined') { + // color1 = colorFunctions.rgba(0, 0, 0, 1.0); + // } + // if (typeof color2 === 'undefined') { + // color2 = colorFunctions.rgba(255, 255, 255, 1.0); + // } + // var contrast1, contrast2; + // var luma = color.luma(); + // var luma1 = color1.luma(); + // var luma2 = color2.luma(); + // // Calculate contrast ratios for each color + // if (luma > luma1) { + // contrast1 = (luma + 0.05) / (luma1 + 0.05); + // } else { + // contrast1 = (luma1 + 0.05) / (luma + 0.05); + // } + // if (luma > luma2) { + // contrast2 = (luma + 0.05) / (luma2 + 0.05); + // } else { + // contrast2 = (luma2 + 0.05) / (luma + 0.05); + // } + // if (contrast1 > contrast2) { + // return color1; + // } else { + // return color2; + // } + // }, + argb: function argb(color) { + return new Anonymous(color.toARGB()); + }, + color: function color(c) { + if (c instanceof Quoted && /^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value)) { + const val = c.value.slice(1); + return new Color(val, undefined, `#${val}`); + } + + if (c instanceof Color || (c = Color.fromKeyword(c.value))) { + c.value = undefined; + return c; + } + + throw { + type: 'Argument', + message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF' + }; + }, + tint: function tint(color, amount) { + return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount); + }, + shade: function shade(color, amount) { + return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount); + } +}; +var color = colorFunctions; + +// ref: http://www.w3.org/TR/compositing-1 + +function colorBlend(mode, color1, color2) { + const ab = color1.alpha; // result + + let // backdrop + cb; + const as = color2.alpha; + let // source + cs; + let ar; + let cr; + const r = []; + ar = as + ab * (1 - as); + + for (let i = 0; i < 3; i++) { + cb = color1.rgb[i] / 255; + cs = color2.rgb[i] / 255; + cr = mode(cb, cs); + + if (ar) { + cr = (as * cs + ab * (cb - as * (cb + cs - cr))) / ar; + } + + r[i] = cr * 255; + } + + return new Color(r, ar); +} + +const colorBlendModeFunctions = { + multiply: function multiply(cb, cs) { + return cb * cs; + }, + screen: function screen(cb, cs) { + return cb + cs - cb * cs; + }, + overlay: function overlay(cb, cs) { + cb *= 2; + return cb <= 1 ? colorBlendModeFunctions.multiply(cb, cs) : colorBlendModeFunctions.screen(cb - 1, cs); + }, + softlight: function softlight(cb, cs) { + let d = 1; + let e = cb; + + if (cs > 0.5) { + e = 1; + d = cb > 0.25 ? Math.sqrt(cb) : ((16 * cb - 12) * cb + 4) * cb; + } + + return cb - (1 - 2 * cs) * e * (d - cb); + }, + hardlight: function hardlight(cb, cs) { + return colorBlendModeFunctions.overlay(cs, cb); + }, + difference: function difference(cb, cs) { + return Math.abs(cb - cs); + }, + exclusion: function exclusion(cb, cs) { + return cb + cs - 2 * cb * cs; + }, + // non-w3c functions: + average: function average(cb, cs) { + return (cb + cs) / 2; + }, + negation: function negation(cb, cs) { + return 1 - Math.abs(cb + cs - 1); + } +}; + +for (const f in colorBlendModeFunctions) { + if (colorBlendModeFunctions.hasOwnProperty(f)) { + colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]); + } +} + +var dataUri = (environment => { + const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); + + return { + 'data-uri': function dataUri(mimetypeNode, filePathNode) { + if (!filePathNode) { + filePathNode = mimetypeNode; + mimetypeNode = null; + } + + let mimetype = mimetypeNode && mimetypeNode.value; + let filePath = filePathNode.value; + const currentFileInfo = this.currentFileInfo; + const currentDirectory = currentFileInfo.rewriteUrls ? currentFileInfo.currentDirectory : currentFileInfo.entryPath; + const fragmentStart = filePath.indexOf('#'); + let fragment = ''; + + if (fragmentStart !== -1) { + fragment = filePath.slice(fragmentStart); + filePath = filePath.slice(0, fragmentStart); + } + + const context = clone(this.context); + context.rawBuffer = true; + const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true); + + if (!fileManager) { + return fallback(this, filePathNode); + } + + let useBase64 = false; // detect the mimetype if not given + + if (!mimetypeNode) { + mimetype = environment.mimeLookup(filePath); + + if (mimetype === 'image/svg+xml') { + useBase64 = false; + } else { + // use base 64 unless it's an ASCII or UTF-8 format + const charset = environment.charsetLookup(mimetype); + useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0; + } + + if (useBase64) { + mimetype += ';base64'; + } + } else { + useBase64 = /;base64$/.test(mimetype); + } + + const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment); + + if (!fileSync.contents) { + logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`); + return fallback(this, filePathNode || mimetypeNode); + } + + let buf = fileSync.contents; + + if (useBase64 && !environment.encodeBase64) { + return fallback(this, filePathNode); + } + + buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf); + const uri = `data:${mimetype},${buf}${fragment}`; + return new URL(new Quoted(`"${uri}"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); + } + }; +}); + +const getItemsFromNode = node => { + // handle non-array values as an array of length 1 + // return 'undefined' if index is invalid + const items = Array.isArray(node.value) ? node.value : Array(node); + return items; +}; + +var list = { + _SELF: function _SELF(n) { + return n; + }, + extract: function extract(values, index) { + index = index.value - 1; // (1-based index) + + return getItemsFromNode(values)[index]; + }, + length: function length(values) { + return new Dimension(getItemsFromNode(values).length); + }, + + /** + * Creates a Less list of incremental values. + * Modeled after Lodash's range function, also exists natively in PHP + * + * @param {Dimension} [start=1] + * @param {Dimension} end - e.g. 10 or 10px - unit is added to output + * @param {Dimension} [step=1] + */ + range: function range(start, end, step) { + let from; + let to; + let stepValue = 1; + const list = []; + + if (end) { + to = end; + from = start.value; + + if (step) { + stepValue = step.value; + } + } else { + from = 1; + to = start; + } + + for (let i = from; i <= to.value; i += stepValue) { + list.push(new Dimension(i, to.unit)); + } + + return new Expression(list); + }, + each: function each(list, rs) { + const rules = []; + let newRules; + let iterator; + + if (list.value && !(list instanceof Quoted)) { + if (Array.isArray(list.value)) { + iterator = list.value; + } else { + iterator = [list.value]; + } + } else if (list.ruleset) { + iterator = list.ruleset.rules; + } else if (list.rules) { + iterator = list.rules; + } else if (Array.isArray(list)) { + iterator = list; + } else { + iterator = [list]; + } + + let valueName = '@value'; + let keyName = '@key'; + let indexName = '@index'; + + if (rs.params) { + valueName = rs.params[0] && rs.params[0].name; + keyName = rs.params[1] && rs.params[1].name; + indexName = rs.params[2] && rs.params[2].name; + rs = rs.rules; + } else { + rs = rs.ruleset; + } + + for (let i = 0; i < iterator.length; i++) { + let key; + let value; + const item = iterator[i]; + + if (item instanceof Declaration) { + key = typeof item.name === 'string' ? item.name : item.name[0].value; + value = item.value; + } else { + key = new Dimension(i + 1); + value = item; + } + + if (item instanceof Comment) { + continue; + } + + newRules = rs.rules.slice(0); + + if (valueName) { + newRules.push(new Declaration(valueName, value, false, false, this.index, this.currentFileInfo)); + } + + if (indexName) { + newRules.push(new Declaration(indexName, new Dimension(i + 1), false, false, this.index, this.currentFileInfo)); + } + + if (keyName) { + newRules.push(new Declaration(keyName, key, false, false, this.index, this.currentFileInfo)); + } + + rules.push(new Ruleset([new Selector([new Element("", '&')])], newRules, rs.strictImports, rs.visibilityInfo())); + } + + return new Ruleset([new Selector([new Element("", '&')])], rules, rs.strictImports, rs.visibilityInfo()).eval(this.context); + } +}; + +const MathHelper = (fn, unit, n) => { + if (!(n instanceof Dimension)) { + throw { + type: 'Argument', + message: 'argument must be a number' + }; + } + + if (unit == null) { + unit = n.unit; + } else { + n = n.unify(); + } + + return new Dimension(fn(parseFloat(n.value)), unit); +}; + +const mathFunctions = { + // name, unit + ceil: null, + floor: null, + sqrt: null, + abs: null, + tan: '', + sin: '', + cos: '', + atan: 'rad', + asin: 'rad', + acos: 'rad' +}; + +for (const f in mathFunctions) { + if (mathFunctions.hasOwnProperty(f)) { + mathFunctions[f] = MathHelper.bind(null, Math[f], mathFunctions[f]); + } +} + +mathFunctions.round = (n, f) => { + const fraction = typeof f === 'undefined' ? 0 : f.value; + return MathHelper(num => num.toFixed(fraction), null, n); +}; + +const minMax = function minMax(isMin, args) { + args = Array.prototype.slice.call(args); + + switch (args.length) { + case 0: + throw { + type: 'Argument', + message: 'one or more arguments required' + }; + } + + let i; // key is the unit.toString() for unified Dimension values, + + let j; + let current; + let currentUnified; + let referenceUnified; + let unit; + let unitStatic; + let unitClone; + const // elems only contains original argument values. + order = []; + const values = {}; // value is the index into the order array. + + for (i = 0; i < args.length; i++) { + current = args[i]; + + if (!(current instanceof Dimension)) { + if (Array.isArray(args[i].value)) { + Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value)); + } + + continue; + } + + currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify(); + unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString(); + unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic; + unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone; + j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit]; + + if (j === undefined) { + if (unitStatic !== undefined && unit !== unitStatic) { + throw { + type: 'Argument', + message: 'incompatible types' + }; + } + + values[unit] = order.length; + order.push(current); + continue; + } + + referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify(); + + if (isMin && currentUnified.value < referenceUnified.value || !isMin && currentUnified.value > referenceUnified.value) { + order[j] = current; + } + } + + if (order.length == 1) { + return order[0]; + } + + args = order.map(function (a) { + return a.toCSS(this.context); + }).join(this.context.compress ? ',' : ', '); + return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`); +}; + +var number$1 = { + min: function min(...args) { + return minMax(true, args); + }, + max: function max(...args) { + return minMax(false, args); + }, + convert: function convert(val, unit) { + return val.convertTo(unit.value); + }, + pi: function pi() { + return new Dimension(Math.PI); + }, + mod: function mod(a, b) { + return new Dimension(a.value % b.value, a.unit); + }, + pow: function pow(x, y) { + if (typeof x === 'number' && typeof y === 'number') { + x = new Dimension(x); + y = new Dimension(y); + } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) { + throw { + type: 'Argument', + message: 'arguments must be numbers' + }; + } + + return new Dimension(Math.pow(x.value, y.value), x.unit); + }, + percentage: function percentage(n) { + const result = MathHelper(num => num * 100, '%', n); + return result; + } +}; + +var string = { + e: function e(str) { + return new Quoted('"', str instanceof JavaScript ? str.evaluated : str.value, true); + }, + escape: function escape(str) { + return new Anonymous(encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B').replace(/\(/g, '%28').replace(/\)/g, '%29')); + }, + replace: function replace(string, pattern, replacement, flags) { + let result = string.value; + replacement = replacement.type === 'Quoted' ? replacement.value : replacement.toCSS(); + result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement); + return new Quoted(string.quote || '', result, string.escaped); + }, + '%': function _(string + /* arg, arg, ... */ + ) { + const args = Array.prototype.slice.call(arguments, 1); + let result = string.value; + + for (let i = 0; i < args.length; i++) { + /* jshint loopfunc:true */ + result = result.replace(/%[sda]/i, token => { + const value = args[i].type === 'Quoted' && token.match(/s/i) ? args[i].value : args[i].toCSS(); + return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value; + }); + } + + result = result.replace(/%%/g, '%'); + return new Quoted(string.quote || '', result, string.escaped); + } +}; + +var svg = (environment => { + return { + 'svg-gradient': function svgGradient(direction) { + let stops; + let gradientDirectionSvg; + let gradientType = 'linear'; + let rectangleDimension = 'x="0" y="0" width="1" height="1"'; + const renderEnv = { + compress: false + }; + let returner; + const directionValue = direction.toCSS(renderEnv); + let i; + let color; + let position; + let positionValue; + let alpha; + + function throwArgumentDescriptor() { + throw { + type: 'Argument', + message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' + ' end_color [end_position] or direction, color list' + }; + } + + if (arguments.length == 2) { + if (arguments[1].value.length < 2) { + throwArgumentDescriptor(); + } + + stops = arguments[1].value; + } else if (arguments.length < 3) { + throwArgumentDescriptor(); + } else { + stops = Array.prototype.slice.call(arguments, 1); + } + + switch (directionValue) { + case 'to bottom': + gradientDirectionSvg = 'x1="0%" y1="0%" x2="0%" y2="100%"'; + break; + + case 'to right': + gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="0%"'; + break; + + case 'to bottom right': + gradientDirectionSvg = 'x1="0%" y1="0%" x2="100%" y2="100%"'; + break; + + case 'to top right': + gradientDirectionSvg = 'x1="0%" y1="100%" x2="100%" y2="0%"'; + break; + + case 'ellipse': + case 'ellipse at center': + gradientType = 'radial'; + gradientDirectionSvg = 'cx="50%" cy="50%" r="75%"'; + rectangleDimension = 'x="-50" y="-50" width="101" height="101"'; + break; + + default: + throw { + type: 'Argument', + message: 'svg-gradient direction must be \'to bottom\', \'to right\',' + ' \'to bottom right\', \'to top right\' or \'ellipse at center\'' + }; + } + + returner = `<${gradientType}Gradient id="g" ${gradientDirectionSvg}>`; + + for (i = 0; i < stops.length; i += 1) { + if (stops[i] instanceof Expression) { + color = stops[i].value[0]; + position = stops[i].value[1]; + } else { + color = stops[i]; + position = undefined; + } + + if (!(color instanceof Color) || !((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension)) { + throwArgumentDescriptor(); + } + + positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%'; + alpha = color.alpha; + returner += ``; + } + + returner += ``; + returner = encodeURIComponent(returner); + returner = `data:image/svg+xml,${returner}`; + return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo); + } + }; +}); + +const isa = (n, Type) => n instanceof Type ? Keyword.True : Keyword.False; + +const isunit = (n, unit) => { + if (unit === undefined) { + throw { + type: 'Argument', + message: 'missing the required second argument to isunit.' + }; + } + + unit = typeof unit.value === 'string' ? unit.value : unit; + + if (typeof unit !== 'string') { + throw { + type: 'Argument', + message: 'Second argument to isunit should be a unit or a string.' + }; + } + + return n instanceof Dimension && n.unit.is(unit) ? Keyword.True : Keyword.False; +}; + +var types = { + isruleset: function isruleset(n) { + return isa(n, DetachedRuleset); + }, + iscolor: function iscolor(n) { + return isa(n, Color); + }, + isnumber: function isnumber(n) { + return isa(n, Dimension); + }, + isstring: function isstring(n) { + return isa(n, Quoted); + }, + iskeyword: function iskeyword(n) { + return isa(n, Keyword); + }, + isurl: function isurl(n) { + return isa(n, URL); + }, + ispixel: function ispixel(n) { + return isunit(n, 'px'); + }, + ispercentage: function ispercentage(n) { + return isunit(n, '%'); + }, + isem: function isem(n) { + return isunit(n, 'em'); + }, + isunit, + unit: function unit(val, _unit) { + if (!(val instanceof Dimension)) { + throw { + type: 'Argument', + message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` + }; + } + + if (_unit) { + if (_unit instanceof Keyword) { + _unit = _unit.value; + } else { + _unit = _unit.toCSS(); + } + } else { + _unit = ''; + } + + return new Dimension(val.value, _unit); + }, + 'get-unit': function getUnit(n) { + return new Anonymous(n.unit); + } +}; + +var Functions = (environment => { + const functions = { + functionRegistry, + functionCaller + }; // register functions + + functionRegistry.addMultiple(boolean$1); + functionRegistry.addMultiple(defaultFunc$1); + functionRegistry.addMultiple(color); + functionRegistry.addMultiple(colorBlend); + functionRegistry.addMultiple(dataUri(environment)); + functionRegistry.addMultiple(list); + functionRegistry.addMultiple(mathFunctions); + functionRegistry.addMultiple(number$1); + functionRegistry.addMultiple(string); + functionRegistry.addMultiple(svg()); + functionRegistry.addMultiple(types); + return functions; +}); + +var sourceMapOutput = (environment => { + class SourceMapOutput { + constructor(options) { + this._css = []; + this._rootNode = options.rootNode; + this._contentsMap = options.contentsMap; + this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap; + + if (options.sourceMapFilename) { + this._sourceMapFilename = options.sourceMapFilename.replace(/\\/g, '/'); + } + + this._outputFilename = options.outputFilename; + this.sourceMapURL = options.sourceMapURL; + + if (options.sourceMapBasepath) { + this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\/g, '/'); + } + + if (options.sourceMapRootpath) { + this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\/g, '/'); + + if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') { + this._sourceMapRootpath += '/'; + } + } else { + this._sourceMapRootpath = ''; + } + + this._outputSourceFiles = options.outputSourceFiles; + this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator(); + this._lineNumber = 0; + this._column = 0; + } + + removeBasepath(path) { + if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) { + path = path.substring(this._sourceMapBasepath.length); + + if (path.charAt(0) === '\\' || path.charAt(0) === '/') { + path = path.substring(1); + } + } + + return path; + } + + normalizeFilename(filename) { + filename = filename.replace(/\\/g, '/'); + filename = this.removeBasepath(filename); + return (this._sourceMapRootpath || '') + filename; + } + + add(chunk, fileInfo, index, mapLines) { + // ignore adding empty strings + if (!chunk) { + return; + } + + let lines; + let sourceLines; + let columns; + let sourceColumns; + let i; + + if (fileInfo && fileInfo.filename) { + let inputSource = this._contentsMap[fileInfo.filename]; // remove vars/banner added to the top of the file + + if (this._contentsIgnoredCharsMap[fileInfo.filename]) { + // adjust the index + index -= this._contentsIgnoredCharsMap[fileInfo.filename]; + + if (index < 0) { + index = 0; + } // adjust the source + + + inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]); + } // ignore empty content + + + if (inputSource === undefined) { + return; + } + + inputSource = inputSource.substring(0, index); + sourceLines = inputSource.split('\n'); + sourceColumns = sourceLines[sourceLines.length - 1]; + } + + lines = chunk.split('\n'); + columns = lines[lines.length - 1]; + + if (fileInfo && fileInfo.filename) { + if (!mapLines) { + this._sourceMapGenerator.addMapping({ + generated: { + line: this._lineNumber + 1, + column: this._column + }, + original: { + line: sourceLines.length, + column: sourceColumns.length + }, + source: this.normalizeFilename(fileInfo.filename) + }); + } else { + for (i = 0; i < lines.length; i++) { + this._sourceMapGenerator.addMapping({ + generated: { + line: this._lineNumber + i + 1, + column: i === 0 ? this._column : 0 + }, + original: { + line: sourceLines.length + i, + column: i === 0 ? sourceColumns.length : 0 + }, + source: this.normalizeFilename(fileInfo.filename) + }); + } + } + } + + if (lines.length === 1) { + this._column += columns.length; + } else { + this._lineNumber += lines.length - 1; + this._column = columns.length; + } + + this._css.push(chunk); + } + + isEmpty() { + return this._css.length === 0; + } + + toCSS(context) { + this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ + file: this._outputFilename, + sourceRoot: null + }); + + if (this._outputSourceFiles) { + for (const filename in this._contentsMap) { + if (this._contentsMap.hasOwnProperty(filename)) { + let source = this._contentsMap[filename]; + + if (this._contentsIgnoredCharsMap[filename]) { + source = source.slice(this._contentsIgnoredCharsMap[filename]); + } + + this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source); + } + } + } + + this._rootNode.genCSS(context, this); + + if (this._css.length > 0) { + let sourceMapURL; + const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON()); + + if (this.sourceMapURL) { + sourceMapURL = this.sourceMapURL; + } else if (this._sourceMapFilename) { + sourceMapURL = this._sourceMapFilename; + } + + this.sourceMapURL = sourceMapURL; + this.sourceMap = sourceMapContent; + } + + return this._css.join(''); + } + + } + + return SourceMapOutput; +}); + +var sourceMapBuilder = ((SourceMapOutput, environment) => { + class SourceMapBuilder { + constructor(options) { + this.options = options; + } + + toCSS(rootNode, options, imports) { + const sourceMapOutput = new SourceMapOutput({ + contentsIgnoredCharsMap: imports.contentsIgnoredChars, + rootNode, + contentsMap: imports.contents, + sourceMapFilename: this.options.sourceMapFilename, + sourceMapURL: this.options.sourceMapURL, + outputFilename: this.options.sourceMapOutputFilename, + sourceMapBasepath: this.options.sourceMapBasepath, + sourceMapRootpath: this.options.sourceMapRootpath, + outputSourceFiles: this.options.outputSourceFiles, + sourceMapGenerator: this.options.sourceMapGenerator, + sourceMapFileInline: this.options.sourceMapFileInline + }); + const css = sourceMapOutput.toCSS(options); + this.sourceMap = sourceMapOutput.sourceMap; + this.sourceMapURL = sourceMapOutput.sourceMapURL; + + if (this.options.sourceMapInputFilename) { + this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename); + } + + if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) { + this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL); + } + + return css + this.getCSSAppendage(); + } + + getCSSAppendage() { + let sourceMapURL = this.sourceMapURL; + + if (this.options.sourceMapFileInline) { + if (this.sourceMap === undefined) { + return ''; + } + + sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`; + } + + if (sourceMapURL) { + return `/*# sourceMappingURL=${sourceMapURL} */`; + } + + return ''; + } + + getExternalSourceMap() { + return this.sourceMap; + } + + setExternalSourceMap(sourceMap) { + this.sourceMap = sourceMap; + } + + isInline() { + return this.options.sourceMapFileInline; + } + + getSourceMapURL() { + return this.sourceMapURL; + } + + getOutputFilename() { + return this.options.sourceMapOutputFilename; + } + + getInputFilename() { + return this.sourceMapInputFilename; + } + + } + + return SourceMapBuilder; +}); + +var transformTree = ((root, options = {}) => { + let evaldRoot; + let variables = options.variables; + const evalEnv = new contexts.Eval(options); // + // Allows setting variables with a hash, so: + // + // `{ color: new tree.Color('#f01') }` will become: + // + // new tree.Declaration('@color', + // new tree.Value([ + // new tree.Expression([ + // new tree.Color('#f01') + // ]) + // ]) + // ) + // + + if (typeof variables === 'object' && !Array.isArray(variables)) { + variables = Object.keys(variables).map(k => { + let value = variables[k]; + + if (!(value instanceof tree.Value)) { + if (!(value instanceof tree.Expression)) { + value = new tree.Expression([value]); + } + + value = new tree.Value([value]); + } + + return new tree.Declaration(`@${k}`, value, false, null, 0); + }); + evalEnv.frames = [new tree.Ruleset(null, variables)]; + } + + const visitors$1 = [new visitors.JoinSelectorVisitor(), new visitors.MarkVisibleSelectorsVisitor(true), new visitors.ExtendVisitor(), new visitors.ToCSSVisitor({ + compress: Boolean(options.compress) + })]; + const preEvalVisitors = []; + let v; + let visitorIterator; + /** + * first() / get() allows visitors to be added while visiting + * + * @todo Add scoping for visitors just like functions for @plugin; right now they're global + */ + + if (options.pluginManager) { + visitorIterator = options.pluginManager.visitor(); + + for (var i = 0; i < 2; i++) { + visitorIterator.first(); + + while (v = visitorIterator.get()) { + if (v.isPreEvalVisitor) { + if (i === 0 || preEvalVisitors.indexOf(v) === -1) { + preEvalVisitors.push(v); + v.run(root); + } + } else { + if (i === 0 || visitors$1.indexOf(v) === -1) { + if (v.isPreVisitor) { + visitors$1.unshift(v); + } else { + visitors$1.push(v); + } + } + } + } + } + } + + evaldRoot = root.eval(evalEnv); + + for (var i = 0; i < visitors$1.length; i++) { + visitors$1[i].run(evaldRoot); + } // Run any remaining visitors added after eval pass + + + if (options.pluginManager) { + visitorIterator.first(); + + while (v = visitorIterator.get()) { + if (visitors$1.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) { + v.run(evaldRoot); + } + } + } + + return evaldRoot; +}); + +var parseTree = (SourceMapBuilder => { + class ParseTree { + constructor(root, imports) { + this.root = root; + this.imports = imports; + } + + toCSS(options) { + let evaldRoot; + const result = {}; + let sourceMapBuilder; + + try { + evaldRoot = transformTree(this.root, options); + } catch (e) { + throw new LessError(e, this.imports); + } + + try { + const compress = Boolean(options.compress); + + if (compress) { + logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); + } + + const toCSSOptions = { + compress, + dumpLineNumbers: options.dumpLineNumbers, + strictUnits: Boolean(options.strictUnits), + numPrecision: 8 + }; + + if (options.sourceMap) { + sourceMapBuilder = new SourceMapBuilder(options.sourceMap); + result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports); + } else { + result.css = evaldRoot.toCSS(toCSSOptions); + } + } catch (e) { + throw new LessError(e, this.imports); + } + + if (options.pluginManager) { + const postProcessors = options.pluginManager.getPostProcessors(); + + for (let i = 0; i < postProcessors.length; i++) { + result.css = postProcessors[i].process(result.css, { + sourceMap: sourceMapBuilder, + options, + imports: this.imports + }); + } + } + + if (options.sourceMap) { + result.map = sourceMapBuilder.getExternalSourceMap(); + } + + result.imports = []; + + for (const file in this.imports.files) { + if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) { + result.imports.push(file); + } + } + + return result; + } + + } + + return ParseTree; +}); + +var importManager = (environment => { + // FileInfo = { + // 'rewriteUrls' - option - whether to adjust URL's to be relative + // 'filename' - full resolved filename of current file + // 'rootpath' - path to append to normal URLs for this node + // 'currentDirectory' - path to the current file, absolute + // 'rootFilename' - filename of the base file + // 'entryPath' - absolute path to the entry file + // 'reference' - whether the file should not be output and only output parts that are referenced + class ImportManager { + constructor(less, context, rootFileInfo) { + this.less = less; + this.rootFilename = rootFileInfo.filename; + this.paths = context.paths || []; // Search paths, when importing + + this.contents = {}; // map - filename to contents of all the files + + this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore + + this.mime = context.mime; + this.error = null; + this.context = context; // Deprecated? Unused outside of here, could be useful. + + this.queue = []; // Files which haven't been imported yet + + this.files = {}; // Holds the imported parse trees. + } + /** + * Add an import to be imported + * @param path - the raw path + * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension) + * @param currentFileInfo - the current file info (used for instance to work out relative paths) + * @param importOptions - import options + * @param callback - callback for when it is imported + */ + + + push(path, tryAppendExtension, currentFileInfo, importOptions, callback) { + const importManager = this; + const pluginLoader = this.context.pluginManager.Loader; + this.queue.push(path); + + const fileParsedFunc = (e, root, fullPath) => { + importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue + + const importedEqualsRoot = fullPath === importManager.rootFilename; + + if (importOptions.optional && e) { + callback(null, { + rules: [] + }, false, null); + logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`); + } else { + // Inline imports aren't cached here. + // If we start to cache them, please make sure they won't conflict with non-inline imports of the + // same name as they used to do before this comment and the condition below have been added. + if (!importManager.files[fullPath] && !importOptions.inline) { + importManager.files[fullPath] = { + root, + options: importOptions + }; + } + + if (e && !importManager.error) { + importManager.error = e; + } + + callback(e, root, importedEqualsRoot, fullPath); + } + }; + + const newFileInfo = { + rewriteUrls: this.context.rewriteUrls, + entryPath: currentFileInfo.entryPath, + rootpath: currentFileInfo.rootpath, + rootFilename: currentFileInfo.rootFilename + }; + const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment); + + if (!fileManager) { + fileParsedFunc({ + message: `Could not find a file-manager for ${path}` + }); + return; + } + + const loadFileCallback = loadedFile => { + let plugin; + const resolvedFilename = loadedFile.filename; + const contents = loadedFile.contents.replace(/^\uFEFF/, ''); // Pass on an updated rootpath if path of imported file is relative and file + // is in a (sub|sup) directory + // + // Examples: + // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/', + // then rootpath should become 'less/module/nav/' + // - If path of imported file is '../mixins.less' and rootpath is 'less/', + // then rootpath should become 'less/../' + + newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename); + + if (newFileInfo.rewriteUrls) { + newFileInfo.rootpath = fileManager.join(importManager.context.rootpath || '', fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath)); + + if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) { + newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath); + } + } + + newFileInfo.filename = resolvedFilename; + const newEnv = new contexts.Parse(importManager.context); + newEnv.processImports = false; + importManager.contents[resolvedFilename] = contents; + + if (currentFileInfo.reference || importOptions.reference) { + newFileInfo.reference = true; + } + + if (importOptions.isPlugin) { + plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo); + + if (plugin instanceof LessError) { + fileParsedFunc(plugin, null, resolvedFilename); + } else { + fileParsedFunc(null, plugin, resolvedFilename); + } + } else if (importOptions.inline) { + fileParsedFunc(null, contents, resolvedFilename); + } else { + // import (multiple) parse trees apparently get altered and can't be cached. + // TODO: investigate why this is + if (importManager.files[resolvedFilename] && !importManager.files[resolvedFilename].options.multiple && !importOptions.multiple) { + fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename); + } else { + new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => { + fileParsedFunc(e, root, resolvedFilename); + }); + } + } + }; + + let promise; + const context = clone(this.context); + + if (tryAppendExtension) { + context.ext = importOptions.isPlugin ? '.js' : '.less'; + } + + if (importOptions.isPlugin) { + context.mime = 'application/javascript'; + promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager); + } else { + promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment, (err, loadedFile) => { + if (err) { + fileParsedFunc(err); + } else { + loadFileCallback(loadedFile); + } + }); + } + + if (promise) { + promise.then(loadFileCallback, fileParsedFunc); + } + } + + } + + return ImportManager; +}); + +var Render = ((environment, ParseTree, ImportManager) => { + const render = function render(input, options, callback) { + if (typeof options === 'function') { + callback = options; + options = copyOptions(this.options, {}); + } else { + options = copyOptions(this.options, options || {}); + } + + if (!callback) { + const self = this; + return new Promise((resolve, reject) => { + render.call(self, input, options, (err, output) => { + if (err) { + reject(err); + } else { + resolve(output); + } + }); + }); + } else { + this.parse(input, options, (err, root, imports, options) => { + if (err) { + return callback(err); + } + + let result; + + try { + const parseTree = new ParseTree(root, imports); + result = parseTree.toCSS(options); + } catch (err) { + return callback(err); + } + + callback(null, result); + }); + } + }; + + return render; +}); + +/** + * Plugin Manager + */ +class PluginManager { + constructor(less) { + this.less = less; + this.visitors = []; + this.preProcessors = []; + this.postProcessors = []; + this.installedPlugins = []; + this.fileManagers = []; + this.iterator = -1; + this.pluginCache = {}; + this.Loader = new less.PluginLoader(less); + } + /** + * Adds all the plugins in the array + * @param {Array} plugins + */ + + + addPlugins(plugins) { + if (plugins) { + for (let i = 0; i < plugins.length; i++) { + this.addPlugin(plugins[i]); + } + } + } + /** + * + * @param plugin + * @param {String} filename + */ + + + addPlugin(plugin, filename, functionRegistry) { + this.installedPlugins.push(plugin); + + if (filename) { + this.pluginCache[filename] = plugin; + } + + if (plugin.install) { + plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry); + } + } + /** + * + * @param filename + */ + + + get(filename) { + return this.pluginCache[filename]; + } + /** + * Adds a visitor. The visitor object has options on itself to determine + * when it should run. + * @param visitor + */ + + + addVisitor(visitor) { + this.visitors.push(visitor); + } + /** + * Adds a pre processor object + * @param {object} preProcessor + * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import + */ + + + addPreProcessor(preProcessor, priority) { + let indexToInsertAt; + + for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) { + if (this.preProcessors[indexToInsertAt].priority >= priority) { + break; + } + } + + this.preProcessors.splice(indexToInsertAt, 0, { + preProcessor, + priority + }); + } + /** + * Adds a post processor object + * @param {object} postProcessor + * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression + */ + + + addPostProcessor(postProcessor, priority) { + let indexToInsertAt; + + for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) { + if (this.postProcessors[indexToInsertAt].priority >= priority) { + break; + } + } + + this.postProcessors.splice(indexToInsertAt, 0, { + postProcessor, + priority + }); + } + /** + * + * @param manager + */ + + + addFileManager(manager) { + this.fileManagers.push(manager); + } + /** + * + * @returns {Array} + * @private + */ + + + getPreProcessors() { + const preProcessors = []; + + for (let i = 0; i < this.preProcessors.length; i++) { + preProcessors.push(this.preProcessors[i].preProcessor); + } + + return preProcessors; + } + /** + * + * @returns {Array} + * @private + */ + + + getPostProcessors() { + const postProcessors = []; + + for (let i = 0; i < this.postProcessors.length; i++) { + postProcessors.push(this.postProcessors[i].postProcessor); + } + + return postProcessors; + } + /** + * + * @returns {Array} + * @private + */ + + + getVisitors() { + return this.visitors; + } + + visitor() { + const self = this; + return { + first: function first() { + self.iterator = -1; + return self.visitors[self.iterator]; + }, + get: function get() { + self.iterator += 1; + return self.visitors[self.iterator]; + } + }; + } + /** + * + * @returns {Array} + * @private + */ + + + getFileManagers() { + return this.fileManagers; + } + +} + +let pm; + +const PluginManagerFactory = (less, newFactory) => { + if (newFactory || !pm) { + pm = new PluginManager(less); + } + + return pm; +}; // + +var Parse = ((environment, ParseTree, ImportManager) => { + const parse = function parse(input, options, callback) { + if (typeof options === 'function') { + callback = options; + options = copyOptions(this.options, {}); + } else { + options = copyOptions(this.options, options || {}); + } + + if (!callback) { + const self = this; + return new Promise((resolve, reject) => { + parse.call(self, input, options, (err, output) => { + if (err) { + reject(err); + } else { + resolve(output); + } + }); + }); + } else { + let context; + let rootFileInfo; + const pluginManager = new PluginManagerFactory(this, !options.reUsePluginManager); + options.pluginManager = pluginManager; + context = new contexts.Parse(options); + + if (options.rootFileInfo) { + rootFileInfo = options.rootFileInfo; + } else { + const filename = options.filename || 'input'; + const entryPath = filename.replace(/[^\/\\]*$/, ''); + rootFileInfo = { + filename, + rewriteUrls: context.rewriteUrls, + rootpath: context.rootpath || '', + currentDirectory: entryPath, + entryPath, + rootFilename: filename + }; // add in a missing trailing slash + + if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') { + rootFileInfo.rootpath += '/'; + } + } + + const imports = new ImportManager(this, context, rootFileInfo); + this.importManager = imports; // TODO: allow the plugins to be just a list of paths or names + // Do an async plugin queue like lessc + + if (options.plugins) { + options.plugins.forEach(plugin => { + let evalResult; + let contents; + + if (plugin.fileContent) { + contents = plugin.fileContent.replace(/^\uFEFF/, ''); + evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename); + + if (evalResult instanceof LessError) { + return callback(evalResult); + } + } else { + pluginManager.addPlugin(plugin); + } + }); + } + + new Parser(context, imports, rootFileInfo).parse(input, (e, root) => { + if (e) { + return callback(e); + } + + callback(null, root, imports, options); + }, options); + } + }; + + return parse; +}); + +var createFromEnvironment = ((environment, fileManagers) => { + const SourceMapOutput = sourceMapOutput(environment); + const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment); + const ParseTree = parseTree(SourceMapBuilder); + const ImportManager = importManager(environment); + const render = Render(environment, ParseTree); + const parse = Parse(environment, ParseTree, ImportManager); + const environ = new environment$1(environment, fileManagers); + const functions = Functions(environment); + const initial = { + version: [3, 9, 0], + data, + tree, + Environment: environment$1, + AbstractFileManager: abstractFileManager, + AbstractPluginLoader, + environment: environ, + visitors, + Parser, + functions, + contexts, + SourceMapOutput, + SourceMapBuilder, + ParseTree, + ImportManager, + render, + parse, + LessError, + transformTree, + utils: utils$1, + PluginManager: PluginManagerFactory, + logger + }; // Create a public API + + const ctor = t => function (...args) { + const obj = Object.create(t.prototype); + t.apply(obj, Array.prototype.slice.call(args, 0)); + return obj; + }; + + let t; + const api = Object.create(initial); + + for (const n in initial.tree) { + /* eslint guard-for-in: 0 */ + t = initial.tree[n]; + + if (typeof t === 'function') { + api[n.toLowerCase()] = ctor(t); + } else { + api[n] = Object.create(null); + + for (const o in t) { + /* eslint guard-for-in: 0 */ + api[n][o.toLowerCase()] = ctor(t[o]); + } + } + } + + return api; +}); + +function createCommonjsModule(fn, module) { + return module = { exports: {} }, fn(module, module.exports), module.exports; +} + +var lesscHelper = createCommonjsModule(function (module, exports) { + // lessc_helper.js + // + // helper functions for lessc + const lessc_helper = { + // Stylize a string + stylize: function stylize(str, style) { + const styles = { + 'reset': [0, 0], + 'bold': [1, 22], + 'inverse': [7, 27], + 'underline': [4, 24], + 'yellow': [33, 39], + 'green': [32, 39], + 'red': [31, 39], + 'grey': [90, 39] + }; + return `\x1b[${styles[style][0]}m${str}\x1b[${styles[style][1]}m`; + }, + // Print command line options + printUsage: function printUsage() { + console.log('usage: lessc [option option=parameter ...] [destination]'); + console.log(''); + console.log('If source is set to `-\' (dash or hyphen-minus), input is read from stdin.'); + console.log(''); + console.log('options:'); + console.log(' -h, --help Prints help (this message) and exit.'); + console.log(' --include-path=PATHS Sets include paths. Separated by `:\'. `;\' also supported on windows.'); + console.log(' -M, --depends Outputs a makefile import dependency list to stdout.'); + console.log(' --no-color Disables colorized output.'); + console.log(' --ie-compat Enables IE8 compatibility checks.'); + console.log(' --js Enables inline JavaScript in less files'); + console.log(' -l, --lint Syntax check only (lint).'); + console.log(' -s, --silent Suppresses output of error messages.'); + console.log(' --strict-imports Forces evaluation of imports.'); + console.log(' --insecure Allows imports from insecure https hosts.'); + console.log(' -v, --version Prints version number and exit.'); + console.log(' --verbose Be verbose.'); + console.log(' --source-map[=FILENAME] Outputs a v3 sourcemap to the filename (or output filename.map).'); + console.log(' --source-map-rootpath=X Adds this path onto the sourcemap filename and less file paths.'); + console.log(' --source-map-basepath=X Sets sourcemap base path, defaults to current working directory.'); + console.log(' --source-map-include-source Puts the less files into the map instead of referencing them.'); + console.log(' --source-map-inline Puts the map (and any less files) as a base64 data uri into the output css file.'); + console.log(' --source-map-url=URL Sets a custom URL to map file, for sourceMappingURL comment'); + console.log(' in generated CSS file.'); + console.log(' -rp, --rootpath=URL Sets rootpath for url rewriting in relative imports and urls'); + console.log(' Works with or without the relative-urls option.'); + console.log(' -ru=, --rewrite-urls= Rewrites URLs to make them relative to the base less file.'); + console.log(' all|local|off \'all\' rewrites all URLs, \'local\' just those starting with a \'.\''); + console.log(''); + console.log(' -m=, --math='); + console.log(' always Less will eagerly perform math operations always.'); + console.log(' parens-division Math performed except for division (/) operator'); + console.log(' parens | strict Math only performed inside parentheses'); + console.log(' strict-legacy Parens required in very strict terms (legacy --strict-math)'); + console.log(''); + console.log(' -su=on|off Allows mixed units, e.g. 1px+1em or 1px*1px which have units'); + console.log(' --strict-units=on|off that cannot be represented.'); + console.log(' --global-var=\'VAR=VALUE\' Defines a variable that can be referenced by the file.'); + console.log(' --modify-var=\'VAR=VALUE\' Modifies a variable already declared in the file.'); + console.log(' --url-args=\'QUERYSTRING\' Adds params into url tokens (e.g. 42, cb=42 or \'a=1&b=2\')'); + console.log(' --plugin=PLUGIN=OPTIONS Loads a plugin. You can also omit the --plugin= if the plugin begins'); + console.log(' less-plugin. E.g. the clean css plugin is called less-plugin-clean-css'); + console.log(' once installed (npm install less-plugin-clean-css), use either with'); + console.log(' --plugin=less-plugin-clean-css or just --clean-css'); + console.log(' specify options afterwards e.g. --plugin=less-plugin-clean-css="advanced"'); + console.log(' or --clean-css="advanced"'); + console.log(''); + console.log('-------------------------- Deprecated ----------------'); + console.log(' -sm=on|off Legacy parens-only math. Use --math'); + console.log(' --strict-math=on|off '); + console.log(''); + console.log(' --line-numbers=TYPE Outputs filename and line numbers.'); + console.log(' TYPE can be either \'comments\', which will output'); + console.log(' the debug info within comments, \'mediaquery\''); + console.log(' that will output the information within a fake'); + console.log(' media query which is compatible with the SASS'); + console.log(' format, and \'all\' which will do both.'); + console.log(' -x, --compress Compresses output by removing some whitespaces.'); + console.log(' We recommend you use a dedicated minifer like less-plugin-clean-css'); + console.log(''); + console.log('Report bugs to: http://github.com/less/less.js/issues'); + console.log('Home page: '); + } + }; // Exports helper functions + + for (const h in lessc_helper) { + if (lessc_helper.hasOwnProperty(h)) { + exports[h] = lessc_helper[h]; + } + } +}); + +/** + * Node Plugin Loader + */ + +class PluginLoader extends AbstractPluginLoader { + constructor(less) { + this.less = less; + + this.require = prefix => { + prefix = path.dirname(prefix); + return id => { + const str = id.substr(0, 2); + + if (str === '..' || str === './') { + return require(path.join(prefix, id)); + } else { + return require(id); + } + }; + }; + } + + loadPlugin(filename, basePath, context, environment, fileManager) { + const prefix = filename.slice(0, 1); + const explicit = prefix === '.' || prefix === '/' || filename.slice(-3).toLowerCase() === '.js'; + + if (!explicit) { + context.prefixes = ['less-plugin-', '']; + } + + return new Promise((fulfill, reject) => { + fileManager.loadFile(filename, basePath, context, environment).then(data => { + try { + fulfill(data); + } catch (e) { + console.log(e); + reject(e); + } + }).catch(err => { + reject(err); + }); + }); + } + +} + +// Export a new default each time +var defaultOptions = (() => ({ + /* Inline Javascript - @plugin still allowed */ + javascriptEnabled: false, + + /* Outputs a makefile import dependency list to stdout. */ + depends: false, + + /* (DEPRECATED) Compress using less built-in compression. + * This does an okay job but does not utilise all the tricks of + * dedicated css compression. */ + compress: false, + + /* Runs the less parser and just reports errors without any output. */ + lint: false, + + /* Sets available include paths. + * If the file in an @import rule does not exist at that exact location, + * less will look for it at the location(s) passed to this option. + * You might use this for instance to specify a path to a library which + * you want to be referenced simply and relatively in the less files. */ + paths: [], + + /* color output in the terminal */ + color: true, + + /* The strictImports controls whether the compiler will allow an @import inside of either + * @media blocks or (a later addition) other selector blocks. + * See: https://github.com/less/less.js/issues/656 */ + strictImports: false, + + /* Allow Imports from Insecure HTTPS Hosts */ + insecure: false, + + /* Allows you to add a path to every generated import and url in your css. + * This does not affect less import statements that are processed, just ones + * that are left in the output css. */ + rootpath: '', + + /* By default URLs are kept as-is, so if you import a file in a sub-directory + * that references an image, exactly the same URL will be output in the css. + * This option allows you to re-write URL's in imported files so that the + * URL is always relative to the base imported file */ + rewriteUrls: false, + + /* Compatibility with IE8. Used for limiting data-uri length */ + // true until 3.0 + ieCompat: false, + + /* How to process math + * 0 always - eagerly try to solve all operations + * 1 parens-division - require parens for division "/" + * 2 parens | strict - require parens for all operations + * 3 strict-legacy - legacy strict behavior (super-strict) + */ + math: 0, + + /* Without this option, less attempts to guess at the output unit when it does maths. */ + strictUnits: false, + + /* Effectively the declaration is put at the top of your base Less file, + * meaning it can be used but it also can be overridden if this variable + * is defined in the file. */ + globalVars: null, + + /* As opposed to the global variable option, this puts the declaration at the + * end of your base file, meaning it will override anything defined in your Less file. */ + modifyVars: null, + + /* This option allows you to specify a argument to go on to every URL. */ + urlArgs: '' +})); + +var imageSize = (environment => { + function _imageSize(functionContext, filePathNode) { + let filePath = filePathNode.value; + const currentFileInfo = functionContext.currentFileInfo; + const currentDirectory = currentFileInfo.rewriteUrls ? currentFileInfo.currentDirectory : currentFileInfo.entryPath; + const fragmentStart = filePath.indexOf('#'); + let fragment = ''; + + if (fragmentStart !== -1) { + fragment = filePath.slice(fragmentStart); + filePath = filePath.slice(0, fragmentStart); + } + + const fileManager = environment.getFileManager(filePath, currentDirectory, functionContext.context, environment, true); + + if (!fileManager) { + throw { + type: 'File', + message: `Can not set up FileManager for ${filePathNode}` + }; + } + + const fileSync = fileManager.loadFileSync(filePath, currentDirectory, functionContext.context, environment); + + if (fileSync.error) { + throw fileSync.error; + } + + const sizeOf = require('image-size'); + + return sizeOf(fileSync.filename); + } + + const imageFunctions = { + 'image-size': function imageSize(filePathNode) { + const size = _imageSize(this, filePathNode); + + return new Expression([new Dimension(size.width, 'px'), new Dimension(size.height, 'px')]); + }, + 'image-width': function imageWidth(filePathNode) { + const size = _imageSize(this, filePathNode); + + return new Dimension(size.width, 'px'); + }, + 'image-height': function imageHeight(filePathNode) { + const size = _imageSize(this, filePathNode); + + return new Dimension(size.height, 'px'); + } + }; + functionRegistry.addMultiple(imageFunctions); +}); + +const less = createFromEnvironment(environment, [new FileManager(), new UrlFileManager()]); // allow people to create less with their own environment + +less.createFromEnvironment = createFromEnvironment; +less.lesscHelper = lesscHelper; +less.PluginLoader = PluginLoader; +less.fs = fs$1; +less.FileManager = FileManager; +less.UrlFileManager = UrlFileManager; // Set up options + +less.options = defaultOptions(); // provide image-size functionality + +imageSize(less.environment); + +let errno; +let mkdirp; try { - errno = require('errno'); + errno = require('errno'); } catch (err) { - errno = null; + errno = null; } - -var less = require('../lib/less-node'), - pluginManager = new less.PluginManager(less), - fileManager = new less.FileManager(), - plugins = [], - queuePlugins = [], - args = process.argv.slice(1), - silent = false, - verbose = false, - options = less.options; - +const pluginManager = new less.PluginManager(less); +const fileManager = new less.FileManager(); +const plugins = []; +const queuePlugins = []; +let args = process.argv.slice(1); +let silent = false; +let verbose = false; +const options = less.options; options.plugins = plugins; options.reUsePluginManager = true; - -var sourceMapOptions = {}; -var continueProcessing = true; - -// Calling process.exit does not flush stdout always. Instead of exiting the process, we set the process' exitCode, +const sourceMapOptions = {}; +let continueProcessing = true; // Calling process.exit does not flush stdout always. Instead of exiting the process, we set the process' exitCode, // close all handles and wait for the event loop to exit the process. // @see https://github.com/nodejs/node/issues/6409 // Unfortunately, node 0.10.x does not support setting process.exitCode, so we need to call reallyExit() explicitly. @@ -38,527 +12549,599 @@ var continueProcessing = true; // Additionally we also need to make sure that uncaughtExceptions are never swallowed. // @see https://github.com/less/less.js/issues/2881 // This code can safely be removed if node 0.10.x is not supported anymore. -process.on('exit', function() { process.reallyExit(process.exitCode); }); -process.on('uncaughtException', function(err) { - console.error(err); - process.exitCode = 1; + +process.on('exit', () => { + process.reallyExit(process.exitCode); }); -// This code will still be required because otherwise rejected promises would not be reported to the user -process.on('unhandledRejection', function(err) { - console.error(err); - process.exitCode = 1; +process.on('uncaughtException', err => { + console.error(err); + process.exitCode = 1; +}); // This code will still be required because otherwise rejected promises would not be reported to the user + +process.on('unhandledRejection', err => { + console.error(err); + process.exitCode = 1; }); -var checkArgFunc = function(arg, option) { - if (!option) { - console.error(arg + ' option requires a parameter'); - continueProcessing = false; - process.exitCode = 1; - return false; - } - return true; +const checkArgFunc = (arg, option) => { + if (!option) { + console.error(`${arg} option requires a parameter`); + continueProcessing = false; + process.exitCode = 1; + return false; + } + + return true; }; -var checkBooleanArg = function(arg) { - var onOff = /^((on|t|true|y|yes)|(off|f|false|n|no))$/i.exec(arg); - if (!onOff) { - console.error(' unable to parse ' + arg + ' as a boolean. use one of on/t/true/y/yes/off/f/false/n/no'); - continueProcessing = false; - process.exitCode = 1; - return false; - } - return Boolean(onOff[2]); +const checkBooleanArg = arg => { + const onOff = /^((on|t|true|y|yes)|(off|f|false|n|no))$/i.exec(arg); + + if (!onOff) { + console.error(` unable to parse ${arg} as a boolean. use one of on/t/true/y/yes/off/f/false/n/no`); + continueProcessing = false; + process.exitCode = 1; + return false; + } + + return Boolean(onOff[2]); }; -var parseVariableOption = function(option, variables) { - var parts = option.split('=', 2); - variables[parts[0]] = parts[1]; +const parseVariableOption = (option, variables) => { + const parts = option.split('=', 2); + variables[parts[0]] = parts[1]; }; -var sourceMapFileInline = false; +let sourceMapFileInline = false; function printUsage() { - less.lesscHelper.printUsage(); - pluginManager.Loader.printUsage(plugins); - continueProcessing = false; + less.lesscHelper.printUsage(); + pluginManager.Loader.printUsage(plugins); + continueProcessing = false; } + function render() { + if (!continueProcessing) { + return; + } + + let input = args[1]; + + if (input && input != '-') { + input = path.resolve(process.cwd(), input); + } - if (!continueProcessing) { + let output = args[2]; + const outputbase = args[2]; + + if (output) { + output = path.resolve(process.cwd(), output); + } + + if (options.sourceMap) { + sourceMapOptions.sourceMapInputFilename = input; + + if (!sourceMapOptions.sourceMapFullFilename) { + if (!output && !sourceMapFileInline) { + console.error('the sourcemap option only has an optional filename if the css filename is given'); + console.error('consider adding --source-map-map-inline which embeds the sourcemap into the css'); + process.exitCode = 1; return; - } + } // its in the same directory, so always just the basename - var input = args[1]; - if (input && input != '-') { - input = path.resolve(process.cwd(), input); - } - var output = args[2]; - var outputbase = args[2]; - if (output) { - output = path.resolve(process.cwd(), output); + + if (output) { + sourceMapOptions.sourceMapOutputFilename = path.basename(output); + sourceMapOptions.sourceMapFullFilename = `${output}.map`; + } // its in the same directory, so always just the basename + + + if ('sourceMapFullFilename' in sourceMapOptions) { + sourceMapOptions.sourceMapFilename = path.basename(sourceMapOptions.sourceMapFullFilename); + } + } else if (options.sourceMap && !sourceMapFileInline) { + const mapFilename = path.resolve(process.cwd(), sourceMapOptions.sourceMapFullFilename); + const mapDir = path.dirname(mapFilename); + const outputDir = path.dirname(output); // find the path from the map to the output file + + sourceMapOptions.sourceMapOutputFilename = path.join(path.relative(mapDir, outputDir), path.basename(output)); // make the sourcemap filename point to the sourcemap relative to the css file output directory + + sourceMapOptions.sourceMapFilename = path.join(path.relative(outputDir, mapDir), path.basename(sourceMapOptions.sourceMapFullFilename)); } + } - if (options.sourceMap) { + if (sourceMapOptions.sourceMapBasepath === undefined) { + sourceMapOptions.sourceMapBasepath = input ? path.dirname(input) : process.cwd(); + } - sourceMapOptions.sourceMapInputFilename = input; - if (!sourceMapOptions.sourceMapFullFilename) { - if (!output && !sourceMapFileInline) { - console.error('the sourcemap option only has an optional filename if the css filename is given'); - console.error('consider adding --source-map-map-inline which embeds the sourcemap into the css'); - process.exitCode = 1; - return; - } - // its in the same directory, so always just the basename - if (output) { - sourceMapOptions.sourceMapOutputFilename = path.basename(output); - sourceMapOptions.sourceMapFullFilename = output + '.map'; - } - // its in the same directory, so always just the basename - if ('sourceMapFullFilename' in sourceMapOptions) { - sourceMapOptions.sourceMapFilename = path.basename(sourceMapOptions.sourceMapFullFilename); - } - } else if (options.sourceMap && !sourceMapFileInline) { - var mapFilename = path.resolve(process.cwd(), sourceMapOptions.sourceMapFullFilename), - mapDir = path.dirname(mapFilename), - outputDir = path.dirname(output); - // find the path from the map to the output file - sourceMapOptions.sourceMapOutputFilename = path.join( - path.relative(mapDir, outputDir), path.basename(output)); + if (sourceMapOptions.sourceMapRootpath === undefined) { + const pathToMap = path.dirname((sourceMapFileInline ? output : sourceMapOptions.sourceMapFullFilename) || '.'); + const pathToInput = path.dirname(sourceMapOptions.sourceMapInputFilename || '.'); + sourceMapOptions.sourceMapRootpath = path.relative(pathToMap, pathToInput); + } + + if (!input) { + console.error('lessc: no input files'); + console.error(''); + printUsage(); + process.exitCode = 1; + return; + } + + const ensureDirectory = filepath => { + const dir = path.dirname(filepath); + let cmd; + const existsSync = fs$1.existsSync || path.existsSync; - // make the sourcemap filename point to the sourcemap relative to the css file output directory - sourceMapOptions.sourceMapFilename = path.join( - path.relative(outputDir, mapDir), path.basename(sourceMapOptions.sourceMapFullFilename)); + if (!existsSync(dir)) { + if (mkdirp === undefined) { + try { + mkdirp = require('mkdirp'); + } catch (e) { + mkdirp = null; } - } + } - if (sourceMapOptions.sourceMapBasepath === undefined) { - sourceMapOptions.sourceMapBasepath = input ? path.dirname(input) : process.cwd(); + cmd = mkdirp && mkdirp.sync || fs$1.mkdirSync; + cmd(dir); } + }; - if (sourceMapOptions.sourceMapRootpath === undefined) { - var pathToMap = path.dirname((sourceMapFileInline ? output : sourceMapOptions.sourceMapFullFilename) || '.'), - pathToInput = path.dirname(sourceMapOptions.sourceMapInputFilename || '.'); - sourceMapOptions.sourceMapRootpath = path.relative(pathToMap, pathToInput); + if (options.depends) { + if (!outputbase) { + console.error('option --depends requires an output path to be specified'); + process.exitCode = 1; + return; } + process.stdout.write(`${outputbase}: `); + } - if (!input) { - console.error('lessc: no input files'); - console.error(''); - printUsage(); - process.exitCode = 1; - return; - } + if (!sourceMapFileInline) { + var writeSourceMap = (output = '', onDone) => { + const filename = sourceMapOptions.sourceMapFullFilename; + ensureDirectory(filename); + fs$1.writeFile(filename, output, 'utf8', err => { + if (err) { + let description = 'Error: '; - var ensureDirectory = function (filepath) { - var dir = path.dirname(filepath), - cmd, - existsSync = fs.existsSync || path.existsSync; - if (!existsSync(dir)) { - if (mkdirp === undefined) { - try {mkdirp = require('mkdirp');} - catch (e) { mkdirp = null; } - } - cmd = mkdirp && mkdirp.sync || fs.mkdirSync; - cmd(dir); + if (errno && errno.errno[err.errno]) { + description += errno.errno[err.errno].description; + } else { + description += `${err.code} ${err.message}`; + } + + console.error(`lessc: failed to create file ${filename}`); + console.error(description); + process.exitCode = 1; + } else { + less.logger.info(`lessc: wrote ${filename}`); } + + onDone(); + }); }; + } + + const writeSourceMapIfNeeded = (output, onDone) => { + if (options.sourceMap && !sourceMapFileInline) { + writeSourceMap(output, onDone); + } else { + onDone(); + } + }; + const writeOutput = (output, result, onSuccess) => { if (options.depends) { - if (!outputbase) { - console.error('option --depends requires an output path to be specified'); - process.exitCode = 1; - return; + onSuccess(); + } else if (output) { + ensureDirectory(output); + fs$1.writeFile(output, result.css, { + encoding: 'utf8' + }, err => { + if (err) { + let description = 'Error: '; + + if (errno && errno.errno[err.errno]) { + description += errno.errno[err.errno].description; + } else { + description += `${err.code} ${err.message}`; + } + + console.error(`lessc: failed to create file ${output}`); + console.error(description); + process.exitCode = 1; + } else { + less.logger.info(`lessc: wrote ${output}`); + onSuccess(); } - process.stdout.write(outputbase + ': '); - } - - if (!sourceMapFileInline) { - var writeSourceMap = function(output, onDone) { - output = output || ''; - var filename = sourceMapOptions.sourceMapFullFilename; - ensureDirectory(filename); - fs.writeFile(filename, output, 'utf8', function (err) { - if (err) { - var description = 'Error: '; - if (errno && errno.errno[err.errno]) { - description += errno.errno[err.errno].description; - } else { - description += err.code + ' ' + err.message; - } - console.error('lessc: failed to create file ' + filename); - console.error(description); - process.exitCode = 1; - } else { - less.logger.info('lessc: wrote ' + filename); - } - onDone(); - }); - }; + }); + } else if (!options.depends) { + process.stdout.write(result.css); + onSuccess(); } + }; - var writeSourceMapIfNeeded = function(output, onDone) { - if (options.sourceMap && !sourceMapFileInline) { - writeSourceMap(output, onDone); - } else { - onDone(); + const logDependencies = (options, result) => { + if (options.depends) { + let depends = ''; + + for (let i = 0; i < result.imports.length; i++) { + depends += `${result.imports[i]} `; + } + + console.log(depends); + } + }; + + const parseLessFile = (e, data) => { + if (e) { + console.error(`lessc: ${e.message}`); + process.exitCode = 1; + return; + } + + data = data.replace(/^\uFEFF/, ''); + options.paths = [path.dirname(input)].concat(options.paths); + options.filename = input; + + if (options.lint) { + options.sourceMap = false; + } + + sourceMapOptions.sourceMapFileInline = sourceMapFileInline; + + if (options.sourceMap) { + options.sourceMap = sourceMapOptions; + } + + less.logger.addListener({ + info: function info(msg) { + if (verbose) { + console.log(msg); } - }; + }, + warn: function warn(msg) { + // do not show warning if the silent option is used + if (!silent) { + console.warn(msg); + } + }, + error: function error(msg) { + console.error(msg); + } + }); + less.render(data, options).then(result => { + if (!options.lint) { + writeOutput(output, result, () => { + writeSourceMapIfNeeded(result.map, () => { + logDependencies(options, result); + }); + }); + } + }, err => { + if (!options.silent) { + console.error(err.toString({ + stylize: options.color && less.lesscHelper.stylize + })); + } - var writeOutput = function(output, result, onSuccess) { - if (options.depends) { - onSuccess(); - } else if (output) { - ensureDirectory(output); - fs.writeFile(output, result.css, {encoding: 'utf8'}, function (err) { - if (err) { - var description = 'Error: '; - if (errno && errno.errno[err.errno]) { - description += errno.errno[err.errno].description; - } else { - description += err.code + ' ' + err.message; - } - console.error('lessc: failed to create file ' + output); - console.error(description); - process.exitCode = 1; - } else { - less.logger.info('lessc: wrote ' + output); - onSuccess(); - } - }); - } else if (!options.depends) { - process.stdout.write(result.css); - onSuccess(); + process.exitCode = 1; + }); + }; + + if (input != '-') { + fs$1.readFile(input, 'utf8', parseLessFile); + } else { + process.stdin.resume(); + process.stdin.setEncoding('utf8'); + let buffer = ''; + process.stdin.on('data', data => { + buffer += data; + }); + process.stdin.on('end', () => { + parseLessFile(false, buffer); + }); + } +} + +function processPluginQueue() { + let x = 0; + + function pluginError(name) { + console.error(`Unable to load plugin ${name} please make sure that it is installed under or at the same level as less`); + process.exitCode = 1; + } + + function pluginFinished(plugin) { + x++; + plugins.push(plugin); + + if (x === queuePlugins.length) { + render(); + } + } + + queuePlugins.forEach(queue => { + const context = clone(options); + pluginManager.Loader.loadPlugin(queue.name, process.cwd(), context, less.environment, fileManager).then(data => { + pluginFinished({ + fileContent: data.contents, + filename: data.filename, + options: queue.options + }); + }).catch(() => { + pluginError(queue.name); + }); + }); +} // self executing function so we can return + + +(() => { + args = args.filter(arg => { + let match; + match = arg.match(/^-I(.+)$/); + + if (match) { + options.paths.push(match[1]); + return false; + } + + match = arg.match(/^--?([a-z][0-9a-z-]*)(?:=(.*))?$/i); + + if (match) { + arg = match[1]; + } else { + return arg; + } + + switch (arg) { + case 'v': + case 'version': + console.log(`lessc ${less.version.join('.')} (Less Compiler) [JavaScript]`); + continueProcessing = false; + break; + + case 'verbose': + verbose = true; + break; + + case 's': + case 'silent': + silent = true; + break; + + case 'l': + case 'lint': + options.lint = true; + break; + + case 'strict-imports': + options.strictImports = true; + break; + + case 'h': + case 'help': + printUsage(); + break; + + case 'x': + case 'compress': + options.compress = true; + break; + + case 'insecure': + options.insecure = true; + break; + + case 'M': + case 'depends': + options.depends = true; + break; + + case 'max-line-len': + if (checkArgFunc(arg, match[2])) { + options.maxLineLen = parseInt(match[2], 10); + + if (options.maxLineLen <= 0) { + options.maxLineLen = -1; + } } - }; - var logDependencies = function(options, result) { - if (options.depends) { - var depends = ''; - for (var i = 0; i < result.imports.length; i++) { - depends += result.imports[i] + ' '; + break; + + case 'no-color': + options.color = false; + break; + + case 'ie-compat': + options.ieCompat = true; + break; + + case 'js': + options.javascriptEnabled = true; + break; + + case 'no-js': + console.error('The "--no-js" argument is deprecated, as inline JavaScript ' + 'is disabled by default. Use "--js" to enable inline JavaScript (not recommended).'); + break; + + case 'include-path': + if (checkArgFunc(arg, match[2])) { + // ; supported on windows. + // : supported on windows and linux, excluding a drive letter like C:\ so C:\file:D:\file parses to 2 + options.paths = match[2].split(os.type().match(/Windows/) ? /:(?!\\)|;/ : ':').map(p => { + if (p) { + return path.resolve(process.cwd(), p); } - console.log(depends); + }); } - }; - var parseLessFile = function (e, data) { - if (e) { - console.error('lessc: ' + e.message); - process.exitCode = 1; - return; + break; + + case 'line-numbers': + if (checkArgFunc(arg, match[2])) { + options.dumpLineNumbers = match[2]; } - data = data.replace(/^\uFEFF/, ''); + break; - options.paths = [path.dirname(input)].concat(options.paths); - options.filename = input; + case 'source-map': + options.sourceMap = true; - if (options.lint) { - options.sourceMap = false; + if (match[2]) { + sourceMapOptions.sourceMapFullFilename = match[2]; } - sourceMapOptions.sourceMapFileInline = sourceMapFileInline; - if (options.sourceMap) { - options.sourceMap = sourceMapOptions; - } + break; - less.logger.addListener({ - info: function(msg) { - if (verbose) { - console.log(msg); - } - }, - warn: function(msg) { - // do not show warning if the silent option is used - if (!silent) { - console.warn(msg); - } - }, - error: function(msg) { - console.error(msg); - } - }); + case 'source-map-rootpath': + if (checkArgFunc(arg, match[2])) { + sourceMapOptions.sourceMapRootpath = match[2]; + } - less.render(data, options) - .then(function(result) { - if (!options.lint) { - writeOutput(output, result, function() { - writeSourceMapIfNeeded(result.map, function() { - logDependencies(options, result); - }); - }); - } - }, - function(err) { - if (!options.silent) { - console.error(err.toString({ - stylize: options.color && less.lesscHelper.stylize - })); - } - process.exitCode = 1; - }); - }; + break; - if (input != '-') { - fs.readFile(input, 'utf8', parseLessFile); - } else { - process.stdin.resume(); - process.stdin.setEncoding('utf8'); + case 'source-map-basepath': + if (checkArgFunc(arg, match[2])) { + sourceMapOptions.sourceMapBasepath = match[2]; + } - var buffer = ''; - process.stdin.on('data', function(data) { - buffer += data; - }); + break; - process.stdin.on('end', function() { - parseLessFile(false, buffer); - }); - } -} + case 'source-map-inline': + case 'source-map-map-inline': + sourceMapFileInline = true; + options.sourceMap = true; + break; -function processPluginQueue() { - var x = 0; + case 'source-map-include-source': + case 'source-map-less-inline': + sourceMapOptions.outputSourceFiles = true; + break; - function pluginError(name) { - console.error('Unable to load plugin ' + name + - ' please make sure that it is installed under or at the same level as less'); - process.exitCode = 1; - } - function pluginFinished(plugin) { - x++; - plugins.push(plugin); - if (x === queuePlugins.length) { - render(); - } - } - queuePlugins.forEach(function(queue) { - var context = utils.clone(options); - pluginManager.Loader.loadPlugin(queue.name, process.cwd(), context, less.environment, fileManager) - .then(function(data) { - pluginFinished({ - fileContent: data.contents, - filename: data.filename, - options: queue.options - }); - }) - .catch(function() { - pluginError(queue.name); - }); - }); -} + case 'source-map-url': + if (checkArgFunc(arg, match[2])) { + sourceMapOptions.sourceMapURL = match[2]; + } -// self executing function so we can return -(function() { - args = args.filter(function (arg) { - var match; + break; - match = arg.match(/^-I(.+)$/); - if (match) { - options.paths.push(match[1]); - return false; + case 'rp': + case 'rootpath': + if (checkArgFunc(arg, match[2])) { + options.rootpath = match[2].replace(/\\/g, '/'); } - match = arg.match(/^--?([a-z][0-9a-z-]*)(?:=(.*))?$/i); - if (match) { - arg = match[1]; + break; + + case 'relative-urls': + console.warn('The --relative-urls option has been deprecated. Use --rewrite-urls=all.'); + options.rewriteUrls = RewriteUrls.ALL; + break; + + case 'ru': + case 'rewrite-urls': + const m = match[2]; + + if (m) { + if (m === 'local') { + options.rewriteUrls = RewriteUrls.LOCAL; + } else if (m === 'off') { + options.rewriteUrls = RewriteUrls.OFF; + } else if (m === 'all') { + options.rewriteUrls = RewriteUrls.ALL; + } else { + console.error(`Unknown rewrite-urls argument ${m}`); + continueProcessing = false; + process.exitCode = 1; + } } else { - return arg; + options.rewriteUrls = RewriteUrls.ALL; } - switch (arg) { - case 'v': - case 'version': - console.log('lessc ' + less.version.join('.') + ' (Less Compiler) [JavaScript]'); - continueProcessing = false; - break; - case 'verbose': - verbose = true; - break; - case 's': - case 'silent': - silent = true; - break; - case 'l': - case 'lint': - options.lint = true; - break; - case 'strict-imports': - options.strictImports = true; - break; - case 'h': - case 'help': - printUsage(); - break; - case 'x': - case 'compress': - options.compress = true; - break; - case 'insecure': - options.insecure = true; - break; - case 'M': - case 'depends': - options.depends = true; - break; - case 'max-line-len': - if (checkArgFunc(arg, match[2])) { - options.maxLineLen = parseInt(match[2], 10); - if (options.maxLineLen <= 0) { - options.maxLineLen = -1; - } - } - break; - case 'no-color': - options.color = false; - break; - case 'ie-compat': - options.ieCompat = true; - break; - case 'js': - options.javascriptEnabled = true; - break; - case 'no-js': - console.error('The "--no-js" argument is deprecated, as inline JavaScript ' + - 'is disabled by default. Use "--js" to enable inline JavaScript (not recommended).'); - break; - case 'include-path': - if (checkArgFunc(arg, match[2])) { - // ; supported on windows. - // : supported on windows and linux, excluding a drive letter like C:\ so C:\file:D:\file parses to 2 - options.paths = match[2] - .split(os.type().match(/Windows/) ? /:(?!\\)|;/ : ':') - .map(function(p) { - if (p) { - return path.resolve(process.cwd(), p); - } - }); - } - break; - case 'line-numbers': - if (checkArgFunc(arg, match[2])) { - options.dumpLineNumbers = match[2]; - } - break; - case 'source-map': - options.sourceMap = true; - if (match[2]) { - sourceMapOptions.sourceMapFullFilename = match[2]; - } - break; - case 'source-map-rootpath': - if (checkArgFunc(arg, match[2])) { - sourceMapOptions.sourceMapRootpath = match[2]; - } - break; - case 'source-map-basepath': - if (checkArgFunc(arg, match[2])) { - sourceMapOptions.sourceMapBasepath = match[2]; - } - break; - case 'source-map-inline': - case 'source-map-map-inline': - sourceMapFileInline = true; - options.sourceMap = true; - break; - case 'source-map-include-source': - case 'source-map-less-inline': - sourceMapOptions.outputSourceFiles = true; - break; - case 'source-map-url': - if (checkArgFunc(arg, match[2])) { - sourceMapOptions.sourceMapURL = match[2]; - } - break; - case 'rp': - case 'rootpath': - if (checkArgFunc(arg, match[2])) { - options.rootpath = match[2].replace(/\\/g, '/'); - } - break; - case 'relative-urls': - console.warn('The --relative-urls option has been deprecated. Use --rewrite-urls=all.'); - options.rewriteUrls = Constants.RewriteUrls.ALL; - break; - case 'ru': - case 'rewrite-urls': - var m = match[2]; - if (m) { - if (m === 'local') { - options.rewriteUrls = Constants.RewriteUrls.LOCAL; - } else if (m === 'off') { - options.rewriteUrls = Constants.RewriteUrls.OFF; - } else if (m === 'all') { - options.rewriteUrls = Constants.RewriteUrls.ALL; - } else { - console.error('Unknown rewrite-urls argument ' + m); - continueProcessing = false; - process.exitCode = 1; - } - } else { - options.rewriteUrls = Constants.RewriteUrls.ALL; - } - break; - case 'sm': - case 'strict-math': - console.warn('The --strict-math option has been deprecated. Use --math=strict.'); - if (checkArgFunc(arg, match[2])) { - if (checkBooleanArg(match[2])) { - options.math = Constants.Math.STRICT_LEGACY; - } - } - break; - case 'm': - case 'math': - if (checkArgFunc(arg, match[2])) { - options.math = match[2]; - } - break; - case 'su': - case 'strict-units': - if (checkArgFunc(arg, match[2])) { - options.strictUnits = checkBooleanArg(match[2]); - } - break; - case 'global-var': - if (checkArgFunc(arg, match[2])) { - if (!options.globalVars) { - options.globalVars = {}; - } - parseVariableOption(match[2], options.globalVars); - } - break; - case 'modify-var': - if (checkArgFunc(arg, match[2])) { - if (!options.modifyVars) { - options.modifyVars = {}; - } + break; - parseVariableOption(match[2], options.modifyVars); - } - break; - case 'url-args': - if (checkArgFunc(arg, match[2])) { - options.urlArgs = match[2]; - } - break; - case 'plugin': - var splitupArg = match[2].match(/^([^=]+)(=(.*))?/), - name = splitupArg[1], - pluginOptions = splitupArg[3]; - queuePlugins.push({ name: name, options: pluginOptions }); - break; - default: - queuePlugins.push({ name: arg, options: match[2], default: true }); - break; + case 'sm': + case 'strict-math': + console.warn('The --strict-math option has been deprecated. Use --math=strict.'); + + if (checkArgFunc(arg, match[2])) { + if (checkBooleanArg(match[2])) { + options.math = Math$1.STRICT_LEGACY; + } } - }); - if (queuePlugins.length > 0) { - processPluginQueue(); - } - else { - render(); + break; + + case 'm': + case 'math': + if (checkArgFunc(arg, match[2])) { + options.math = match[2]; + } + + break; + + case 'su': + case 'strict-units': + if (checkArgFunc(arg, match[2])) { + options.strictUnits = checkBooleanArg(match[2]); + } + + break; + + case 'global-var': + if (checkArgFunc(arg, match[2])) { + if (!options.globalVars) { + options.globalVars = {}; + } + + parseVariableOption(match[2], options.globalVars); + } + + break; + + case 'modify-var': + if (checkArgFunc(arg, match[2])) { + if (!options.modifyVars) { + options.modifyVars = {}; + } + + parseVariableOption(match[2], options.modifyVars); + } + + break; + + case 'url-args': + if (checkArgFunc(arg, match[2])) { + options.urlArgs = match[2]; + } + + break; + + case 'plugin': + const splitupArg = match[2].match(/^([^=]+)(=(.*))?/); + const name = splitupArg[1]; + const pluginOptions = splitupArg[3]; + queuePlugins.push({ + name, + options: pluginOptions + }); + break; + + default: + queuePlugins.push({ + name: arg, + options: match[2], + default: true + }); + break; } + }); + if (queuePlugins.length > 0) { + processPluginQueue(); + } else { + render(); + } })(); diff --git a/build/banner.js b/build/banner.js new file mode 100644 index 000000000..44074aac6 --- /dev/null +++ b/build/banner.js @@ -0,0 +1,13 @@ +const pkg = require('./../package.json'); + +module.exports = +`/** + * Less - ${ pkg.description } v${ pkg.version } + * http://lesscss.org + * + * Copyright (c) 2009-${new Date().getFullYear()}, ${ pkg.author.name } <${ pkg.author.email }> + * Licensed under the ${ pkg.license } License. + * + * @license ${ pkg.license } + */ +`; diff --git a/lebab-convert.js b/build/lebab-convert.js similarity index 90% rename from lebab-convert.js rename to build/lebab-convert.js index ee56b9266..236ad0bd3 100644 --- a/lebab-convert.js +++ b/build/lebab-convert.js @@ -1,9 +1,11 @@ +/** @todo - REMOVE - original script to convert project to ES6 */ + const transform = require("lebab").transform; const readGlob = require("read-glob"); const fs = require("fs"); const path = require("path"); -readGlob("lib/**/*.js").subscribe({ +readGlob("./../bin/lessc").subscribe({ next(result) { if (result.path.indexOf("source-map/") === -1) { try { diff --git a/build/rollup.js b/build/rollup.js index d4293c134..152cbaa21 100644 --- a/build/rollup.js +++ b/build/rollup.js @@ -3,90 +3,147 @@ const babel = require('rollup-plugin-babel'); const resolve = require('rollup-plugin-node-resolve'); const commonjs = require('rollup-plugin-commonjs'); const terser = require('rollup-plugin-terser').terser; +const banner = require('./banner'); + +const args = require('minimist')(process.argv.slice(2)); + +const babelConfig = { + exclude: 'node_modules/**' // only transpile our source code +}; + +let outDir = args.dist ? './dist' : './tmp'; async function buildBrowser() { - let bundle; - const outputOptions = { + let bundle = await rollup.rollup({ + input: './lib/less-browser/bootstrap.js', + output: [ + { + file: 'less.js', + format: 'umd' + }, + { + file: 'less.min.js', + format: 'umd' + } + ], + plugins: [ + resolve(), + commonjs(), + babel({ + ...babelConfig, + presets: [["@babel/env", { + targets: '> 0.25%, not dead' + }]] + }), + terser({ + include: [/^.+\.min\.js$/] + }) + ] + }); - }; - try { - bundle = await rollup.rollup({ - input: './lib/less-browser/bootstrap.js', - plugins: [ - resolve(), - commonjs(), - babel({ - presets: [["@babel/env", { - targets: '> 0.25%, not dead' - }]], - exclude: 'node_modules/**' // only transpile our source code - }) - ] - }); + if (!args.out || args.out.indexOf('less.js') > -1) { + const file = args.out || `${outDir}/less.js`; + console.log(`Writing ${file}...`); + await bundle.write({ + file, + format: 'umd', + name: 'less', + banner + }); } - catch (e) { - console.log(e); - return; + + if (!args.out || args.out.indexOf('less.min.js') > -1) { + const file = args.out || `${outDir}/less.min.js`; + console.log(`Writing ${file}...`); + await bundle.write({ + file: args.out || `${outDir}/less.min.js`, + format: 'umd', + name: 'less', + sourcemap: true, + banner + }); } +} - const cache = bundle.cache; +async function buildNode() { + let bundle = await rollup.rollup({ + input: './lib/less-node/index.js', + external(id) { + return /^[^.]/.test(id) + }, + plugins: [ + resolve({ + only: [/^\.{0,2}\//], + }), + commonjs(), + babel({ + ...babelConfig, + presets: [["@babel/env", { + targets: { + node: '6' + } + }]] + }) + ] + }); + + const file = args.out || './dist/less.cjs.js'; + console.log(`Writing ${file}...`); await bundle.write({ - file: './dist/less.js', - format: 'umd', - name: 'less' + file, + format: 'cjs', + interop: false }); +} - bundle = await rollup.rollup({ - cache, +async function buildLessC() { + let bundle = await rollup.rollup({ + input: './lib/lessc.js', + external(id) { + return /^[^.]/.test(id) + }, plugins: [ - terser() + resolve({ + only: [/^\.{0,2}\//], + }), + commonjs(), + babel({ + ...babelConfig, + presets: [["@babel/env", { + targets: { + node: '6' + } + }]] + }) ] }); + const file = args.out || './dist/less.cjs.js' + console.log(`Writing ${file}...`); + await bundle.write({ - file: './dist/less.min.js', - format: 'umd', - name: 'less', - sourcemap: true + file, + banner: '#!/usr/bin/env node\n', + format: 'cjs', + interop: false }); } -async function buildNode() { - let bundle; - try { - bundle = await rollup.rollup({ - input: './lib/less-node/index.js', - plugins: [ - resolve({ - only: [/^\.{0,2}\//], - }), - commonjs(), - babel({ - presets: [["@babel/env", { - targets: { - node: '6' - } - }]], - exclude: 'node_modules/**' // only transpile our source code - }) - ] - }); +async function build() { + if (args.dist || args.lessc) { + await buildLessC(); } - catch (e) { - console.log(e); - return; + if (args.dist || args.browser) { + await buildBrowser(); + } + if (args.dist || args.node) { + await buildNode(); } - - await bundle.write({ - file: './dist/less.cjs.js', - format: 'cjs' - }); } - -async function build() { - await buildBrowser(); - // await buildNode(); +try { + build(); } - -build(); \ No newline at end of file +catch(e) { + throw e; +} \ No newline at end of file diff --git a/dist/less.js b/dist/less.js index 551d9daa4..872df8eac 100644 --- a/dist/less.js +++ b/dist/less.js @@ -1,3 +1,13 @@ +/** + * Less - Leaner CSS v3.9.0 + * http://lesscss.org + * + * Copyright (c) 2009-2019, Alexis Sellier + * Licensed under the Apache-2.0 License. + * + * @license Apache-2.0 + */ + (function (global, factory) { typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : typeof define === 'function' && define.amd ? define(factory) : diff --git a/dist/less.js.map b/dist/less.js.map deleted file mode 100644 index 07e2dd187..000000000 --- a/dist/less.js.map +++ /dev/null @@ -1 +0,0 @@ -{"version":3,"file":"less.js","sources":["../lib/less/default-options.js","../lib/less-browser/utils.js","../lib/less-browser/browser.js","../lib/less-browser/add-default-options.js","../lib/less/data/colors.js","../lib/less/data/unit-conversions.js","../lib/less/data/index.js","../lib/less/tree/node.js","../lib/less/tree/color.js","../lib/less/tree/paren.js","../lib/less/tree/combinator.js","../lib/less/tree/element.js","../lib/less/constants.js","../node_modules/clone/clone.js","../lib/less/utils.js","../lib/less/less-error.js","../lib/less/tree/selector.js","../lib/less/tree/value.js","../lib/less/tree/keyword.js","../lib/less/tree/anonymous.js","../lib/less/tree/declaration.js","../lib/less/tree/debug-info.js","../lib/less/tree/comment.js","../lib/less/contexts.js","../lib/less/functions/function-registry.js","../lib/less/functions/default.js","../lib/less/tree/ruleset.js","../lib/less/tree/atrule.js","../lib/less/tree/detached-ruleset.js","../lib/less/tree/unit.js","../lib/less/tree/dimension.js","../lib/less/tree/operation.js","../lib/less/tree/expression.js","../lib/less/functions/function-caller.js","../lib/less/tree/call.js","../lib/less/tree/variable.js","../lib/less/tree/property.js","../lib/less/tree/attribute.js","../lib/less/tree/quoted.js","../lib/less/tree/url.js","../lib/less/tree/media.js","../lib/less/tree/import.js","../lib/less/tree/js-eval-node.js","../lib/less/tree/javascript.js","../lib/less/tree/assignment.js","../lib/less/tree/condition.js","../lib/less/tree/unicode-descriptor.js","../lib/less/tree/negative.js","../lib/less/tree/extend.js","../lib/less/tree/variable-call.js","../lib/less/tree/namespace-value.js","../lib/less/tree/mixin-definition.js","../lib/less/tree/mixin-call.js","../lib/less/tree/index.js","../lib/less/logger.js","../lib/less/environment/environment.js","../lib/less/environment/abstract-file-manager.js","../lib/less/environment/abstract-plugin-loader.js","../lib/less/visitors/visitor.js","../lib/less/visitors/import-sequencer.js","../lib/less/visitors/import-visitor.js","../lib/less/visitors/set-tree-visibility-visitor.js","../lib/less/visitors/extend-visitor.js","../lib/less/visitors/join-selector-visitor.js","../lib/less/visitors/to-css-visitor.js","../lib/less/visitors/index.js","../lib/less/parser/chunker.js","../lib/less/parser/parser-input.js","../lib/less/parser/parser.js","../lib/less/functions/boolean.js","../lib/less/functions/color.js","../lib/less/functions/color-blending.js","../lib/less/functions/data-uri.js","../lib/less/functions/list.js","../lib/less/functions/math-helper.js","../lib/less/functions/math.js","../lib/less/functions/number.js","../lib/less/functions/string.js","../lib/less/functions/svg.js","../lib/less/functions/types.js","../lib/less/functions/index.js","../lib/less/source-map-output.js","../lib/less/source-map-builder.js","../lib/less/transform-tree.js","../lib/less/parse-tree.js","../lib/less/import-manager.js","../lib/less/render.js","../lib/less/plugin-manager.js","../lib/less/parse.js","../lib/less/index.js","../lib/less-browser/file-manager.js","../lib/less-browser/plugin-loader.js","../lib/less-browser/log-listener.js","../lib/less-browser/error-reporting.js","../lib/less-browser/cache.js","../lib/less-browser/image-size.js","../lib/less-browser/index.js","../lib/less-browser/bootstrap.js"],"sourcesContent":["// Export a new default each time\nexport default () => ({\n /* Inline Javascript - @plugin still allowed */\n javascriptEnabled: false,\n\n /* Outputs a makefile import dependency list to stdout. */\n depends: false,\n\n /* (DEPRECATED) Compress using less built-in compression. \n * This does an okay job but does not utilise all the tricks of \n * dedicated css compression. */\n compress: false,\n\n /* Runs the less parser and just reports errors without any output. */\n lint: false,\n\n /* Sets available include paths.\n * If the file in an @import rule does not exist at that exact location, \n * less will look for it at the location(s) passed to this option. \n * You might use this for instance to specify a path to a library which \n * you want to be referenced simply and relatively in the less files. */\n paths: [],\n\n /* color output in the terminal */\n color: true,\n\n /* The strictImports controls whether the compiler will allow an @import inside of either \n * @media blocks or (a later addition) other selector blocks.\n * See: https://github.com/less/less.js/issues/656 */\n strictImports: false,\n\n /* Allow Imports from Insecure HTTPS Hosts */\n insecure: false,\n\n /* Allows you to add a path to every generated import and url in your css. \n * This does not affect less import statements that are processed, just ones \n * that are left in the output css. */\n rootpath: '',\n\n /* By default URLs are kept as-is, so if you import a file in a sub-directory \n * that references an image, exactly the same URL will be output in the css. \n * This option allows you to re-write URL's in imported files so that the \n * URL is always relative to the base imported file */\n rewriteUrls: false,\n\n /* Compatibility with IE8. Used for limiting data-uri length */\n // true until 3.0\n ieCompat: false,\n\n /* How to process math \n * 0 always - eagerly try to solve all operations\n * 1 parens-division - require parens for division \"/\"\n * 2 parens | strict - require parens for all operations\n * 3 strict-legacy - legacy strict behavior (super-strict)\n */\n math: 0,\n\n /* Without this option, less attempts to guess at the output unit when it does maths. */\n strictUnits: false,\n\n /* Effectively the declaration is put at the top of your base Less file, \n * meaning it can be used but it also can be overridden if this variable \n * is defined in the file. */\n globalVars: null,\n\n /* As opposed to the global variable option, this puts the declaration at the\n * end of your base file, meaning it will override anything defined in your Less file. */\n modifyVars: null,\n\n /* This option allows you to specify a argument to go on to every URL. */\n urlArgs: ''\n});","\nexport function extractId(href) {\n return href.replace(/^[a-z-]+:\\/+?[^\\/]+/, '') // Remove protocol & domain\n .replace(/[\\?\\&]livereload=\\w+/, '') // Remove LiveReload cachebuster\n .replace(/^\\//, '') // Remove root /\n .replace(/\\.[a-zA-Z]+$/, '') // Remove simple extension\n .replace(/[^\\.\\w-]+/g, '-') // Replace illegal characters\n .replace(/\\./g, ':'); // Replace dots with colons(for valid id)\n}\n\nexport function addDataAttr(options, tag) {\n for (const opt in tag.dataset) {\n if (tag.dataset.hasOwnProperty(opt)) {\n if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') {\n options[opt] = tag.dataset[opt];\n } else {\n try {\n options[opt] = JSON.parse(tag.dataset[opt]);\n }\n catch (_) {}\n }\n }\n }\n}\n","import * as utils from './utils';\n\nexport default {\n createCSS: function (document, styles, sheet) {\n // Strip the query-string\n const href = sheet.href || '';\n\n // If there is no title set, use the filename, minus the extension\n const id = `less:${sheet.title || utils.extractId(href)}`;\n\n // If this has already been inserted into the DOM, we may need to replace it\n const oldStyleNode = document.getElementById(id);\n let keepOldStyleNode = false;\n\n // Create a new stylesheet node for insertion or (if necessary) replacement\n const styleNode = document.createElement('style');\n styleNode.setAttribute('type', 'text/css');\n if (sheet.media) {\n styleNode.setAttribute('media', sheet.media);\n }\n styleNode.id = id;\n\n if (!styleNode.styleSheet) {\n styleNode.appendChild(document.createTextNode(styles));\n\n // If new contents match contents of oldStyleNode, don't replace oldStyleNode\n keepOldStyleNode = (oldStyleNode !== null && oldStyleNode.childNodes.length > 0 && styleNode.childNodes.length > 0 &&\n oldStyleNode.firstChild.nodeValue === styleNode.firstChild.nodeValue);\n }\n\n const head = document.getElementsByTagName('head')[0];\n\n // If there is no oldStyleNode, just append; otherwise, only append if we need\n // to replace oldStyleNode with an updated stylesheet\n if (oldStyleNode === null || keepOldStyleNode === false) {\n const nextEl = sheet && sheet.nextSibling || null;\n if (nextEl) {\n nextEl.parentNode.insertBefore(styleNode, nextEl);\n } else {\n head.appendChild(styleNode);\n }\n }\n if (oldStyleNode && keepOldStyleNode === false) {\n oldStyleNode.parentNode.removeChild(oldStyleNode);\n }\n\n // For IE.\n // This needs to happen *after* the style element is added to the DOM, otherwise IE 7 and 8 may crash.\n // See http://social.msdn.microsoft.com/Forums/en-US/7e081b65-878a-4c22-8e68-c10d39c2ed32/internet-explorer-crashes-appending-style-element-to-head\n if (styleNode.styleSheet) {\n try {\n styleNode.styleSheet.cssText = styles;\n } catch (e) {\n throw new Error('Couldn\\'t reassign styleSheet.cssText.');\n }\n }\n },\n currentScript: function(window) {\n const document = window.document;\n return document.currentScript || (() => {\n const scripts = document.getElementsByTagName('script');\n return scripts[scripts.length - 1];\n })();\n }\n};\n","import {addDataAttr} from './utils';\nimport browser from './browser';\n\nexport default (window, options) => {\n\n // use options from the current script tag data attribues\n addDataAttr(options, browser.currentScript(window));\n\n if (options.isFileProtocol === undefined) {\n options.isFileProtocol = /^(file|(chrome|safari)(-extension)?|resource|qrc|app):/.test(window.location.protocol);\n }\n\n // Load styles asynchronously (default: false)\n //\n // This is set to `false` by default, so that the body\n // doesn't start loading before the stylesheets are parsed.\n // Setting this to `true` can result in flickering.\n //\n options.async = options.async || false;\n options.fileAsync = options.fileAsync || false;\n\n // Interval between watch polls\n options.poll = options.poll || (options.isFileProtocol ? 1000 : 1500);\n\n options.env = options.env || (window.location.hostname == '127.0.0.1' ||\n window.location.hostname == '0.0.0.0' ||\n window.location.hostname == 'localhost' ||\n (window.location.port &&\n window.location.port.length > 0) ||\n options.isFileProtocol ? 'development'\n : 'production');\n\n const dumpLineNumbers = /!dumpLineNumbers:(comments|mediaquery|all)/.exec(window.location.hash);\n if (dumpLineNumbers) {\n options.dumpLineNumbers = dumpLineNumbers[1];\n }\n\n if (options.useFileCache === undefined) {\n options.useFileCache = true;\n }\n\n if (options.onReady === undefined) {\n options.onReady = true;\n }\n\n if (options.relativeUrls) {\n options.rewriteUrls = 'all';\n }\n};\n","export default {\n 'aliceblue':'#f0f8ff',\n 'antiquewhite':'#faebd7',\n 'aqua':'#00ffff',\n 'aquamarine':'#7fffd4',\n 'azure':'#f0ffff',\n 'beige':'#f5f5dc',\n 'bisque':'#ffe4c4',\n 'black':'#000000',\n 'blanchedalmond':'#ffebcd',\n 'blue':'#0000ff',\n 'blueviolet':'#8a2be2',\n 'brown':'#a52a2a',\n 'burlywood':'#deb887',\n 'cadetblue':'#5f9ea0',\n 'chartreuse':'#7fff00',\n 'chocolate':'#d2691e',\n 'coral':'#ff7f50',\n 'cornflowerblue':'#6495ed',\n 'cornsilk':'#fff8dc',\n 'crimson':'#dc143c',\n 'cyan':'#00ffff',\n 'darkblue':'#00008b',\n 'darkcyan':'#008b8b',\n 'darkgoldenrod':'#b8860b',\n 'darkgray':'#a9a9a9',\n 'darkgrey':'#a9a9a9',\n 'darkgreen':'#006400',\n 'darkkhaki':'#bdb76b',\n 'darkmagenta':'#8b008b',\n 'darkolivegreen':'#556b2f',\n 'darkorange':'#ff8c00',\n 'darkorchid':'#9932cc',\n 'darkred':'#8b0000',\n 'darksalmon':'#e9967a',\n 'darkseagreen':'#8fbc8f',\n 'darkslateblue':'#483d8b',\n 'darkslategray':'#2f4f4f',\n 'darkslategrey':'#2f4f4f',\n 'darkturquoise':'#00ced1',\n 'darkviolet':'#9400d3',\n 'deeppink':'#ff1493',\n 'deepskyblue':'#00bfff',\n 'dimgray':'#696969',\n 'dimgrey':'#696969',\n 'dodgerblue':'#1e90ff',\n 'firebrick':'#b22222',\n 'floralwhite':'#fffaf0',\n 'forestgreen':'#228b22',\n 'fuchsia':'#ff00ff',\n 'gainsboro':'#dcdcdc',\n 'ghostwhite':'#f8f8ff',\n 'gold':'#ffd700',\n 'goldenrod':'#daa520',\n 'gray':'#808080',\n 'grey':'#808080',\n 'green':'#008000',\n 'greenyellow':'#adff2f',\n 'honeydew':'#f0fff0',\n 'hotpink':'#ff69b4',\n 'indianred':'#cd5c5c',\n 'indigo':'#4b0082',\n 'ivory':'#fffff0',\n 'khaki':'#f0e68c',\n 'lavender':'#e6e6fa',\n 'lavenderblush':'#fff0f5',\n 'lawngreen':'#7cfc00',\n 'lemonchiffon':'#fffacd',\n 'lightblue':'#add8e6',\n 'lightcoral':'#f08080',\n 'lightcyan':'#e0ffff',\n 'lightgoldenrodyellow':'#fafad2',\n 'lightgray':'#d3d3d3',\n 'lightgrey':'#d3d3d3',\n 'lightgreen':'#90ee90',\n 'lightpink':'#ffb6c1',\n 'lightsalmon':'#ffa07a',\n 'lightseagreen':'#20b2aa',\n 'lightskyblue':'#87cefa',\n 'lightslategray':'#778899',\n 'lightslategrey':'#778899',\n 'lightsteelblue':'#b0c4de',\n 'lightyellow':'#ffffe0',\n 'lime':'#00ff00',\n 'limegreen':'#32cd32',\n 'linen':'#faf0e6',\n 'magenta':'#ff00ff',\n 'maroon':'#800000',\n 'mediumaquamarine':'#66cdaa',\n 'mediumblue':'#0000cd',\n 'mediumorchid':'#ba55d3',\n 'mediumpurple':'#9370d8',\n 'mediumseagreen':'#3cb371',\n 'mediumslateblue':'#7b68ee',\n 'mediumspringgreen':'#00fa9a',\n 'mediumturquoise':'#48d1cc',\n 'mediumvioletred':'#c71585',\n 'midnightblue':'#191970',\n 'mintcream':'#f5fffa',\n 'mistyrose':'#ffe4e1',\n 'moccasin':'#ffe4b5',\n 'navajowhite':'#ffdead',\n 'navy':'#000080',\n 'oldlace':'#fdf5e6',\n 'olive':'#808000',\n 'olivedrab':'#6b8e23',\n 'orange':'#ffa500',\n 'orangered':'#ff4500',\n 'orchid':'#da70d6',\n 'palegoldenrod':'#eee8aa',\n 'palegreen':'#98fb98',\n 'paleturquoise':'#afeeee',\n 'palevioletred':'#d87093',\n 'papayawhip':'#ffefd5',\n 'peachpuff':'#ffdab9',\n 'peru':'#cd853f',\n 'pink':'#ffc0cb',\n 'plum':'#dda0dd',\n 'powderblue':'#b0e0e6',\n 'purple':'#800080',\n 'rebeccapurple':'#663399',\n 'red':'#ff0000',\n 'rosybrown':'#bc8f8f',\n 'royalblue':'#4169e1',\n 'saddlebrown':'#8b4513',\n 'salmon':'#fa8072',\n 'sandybrown':'#f4a460',\n 'seagreen':'#2e8b57',\n 'seashell':'#fff5ee',\n 'sienna':'#a0522d',\n 'silver':'#c0c0c0',\n 'skyblue':'#87ceeb',\n 'slateblue':'#6a5acd',\n 'slategray':'#708090',\n 'slategrey':'#708090',\n 'snow':'#fffafa',\n 'springgreen':'#00ff7f',\n 'steelblue':'#4682b4',\n 'tan':'#d2b48c',\n 'teal':'#008080',\n 'thistle':'#d8bfd8',\n 'tomato':'#ff6347',\n 'turquoise':'#40e0d0',\n 'violet':'#ee82ee',\n 'wheat':'#f5deb3',\n 'white':'#ffffff',\n 'whitesmoke':'#f5f5f5',\n 'yellow':'#ffff00',\n 'yellowgreen':'#9acd32'\n};","export default {\n length: {\n 'm': 1,\n 'cm': 0.01,\n 'mm': 0.001,\n 'in': 0.0254,\n 'px': 0.0254 / 96,\n 'pt': 0.0254 / 72,\n 'pc': 0.0254 / 72 * 12\n },\n duration: {\n 's': 1,\n 'ms': 0.001\n },\n angle: {\n 'rad': 1 / (2 * Math.PI),\n 'deg': 1 / 360,\n 'grad': 1 / 400,\n 'turn': 1\n }\n};","import colors from './colors';\nimport unitConversions from './unit-conversions';\n\nexport default { colors, unitConversions };\n","class Node {\n constructor() {\n this.parent = null;\n this.visibilityBlocks = undefined;\n this.nodeVisible = undefined;\n this.rootNode = null;\n this.parsed = null;\n\n const self = this;\n Object.defineProperty(this, 'currentFileInfo', {\n get: function() { return self.fileInfo(); }\n });\n Object.defineProperty(this, 'index', {\n get: function() { return self.getIndex(); }\n });\n\n }\n\n setParent(nodes, parent) {\n function set(node) {\n if (node && node instanceof Node) {\n node.parent = parent;\n }\n }\n if (Array.isArray(nodes)) {\n nodes.forEach(set);\n }\n else {\n set(nodes);\n }\n }\n\n getIndex() {\n return this._index || (this.parent && this.parent.getIndex()) || 0;\n }\n\n fileInfo() {\n return this._fileInfo || (this.parent && this.parent.fileInfo()) || {};\n }\n\n isRulesetLike() {\n return false;\n }\n\n toCSS(context) {\n const strs = [];\n this.genCSS(context, {\n add: function(chunk, fileInfo, index) {\n strs.push(chunk);\n },\n isEmpty: function () {\n return strs.length === 0;\n }\n });\n return strs.join('');\n }\n\n genCSS(context, output) {\n output.add(this.value);\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval() { return this; }\n\n _operate(context, op, a, b) {\n switch (op) {\n case '+': return a + b;\n case '-': return a - b;\n case '*': return a * b;\n case '/': return a / b;\n }\n }\n\n fround(context, value) {\n const precision = context && context.numPrecision;\n // add \"epsilon\" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded:\n return (precision) ? Number((value + 2e-16).toFixed(precision)) : value;\n }\n\n // Returns true if this node represents root of ast imported by reference\n blocksVisibility() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n return this.visibilityBlocks !== 0;\n }\n\n addVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks + 1;\n }\n\n removeVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks - 1;\n }\n\n // Turns on node visibility - if called node will be shown in output regardless\n // of whether it comes from import by reference or not\n ensureVisibility() {\n this.nodeVisible = true;\n }\n\n // Turns off node visibility - if called node will NOT be shown in output regardless\n // of whether it comes from import by reference or not\n ensureInvisibility() {\n this.nodeVisible = false;\n }\n\n // return values:\n // false - the node must not be visible\n // true - the node must be visible\n // undefined or null - the node has the same visibility as its parent\n isVisible() {\n return this.nodeVisible;\n }\n\n visibilityInfo() {\n return {\n visibilityBlocks: this.visibilityBlocks,\n nodeVisible: this.nodeVisible\n };\n }\n\n copyVisibilityInfo(info) {\n if (!info) {\n return;\n }\n this.visibilityBlocks = info.visibilityBlocks;\n this.nodeVisible = info.nodeVisible;\n }\n}\n\nNode.compare = (a, b) => {\n /* returns:\n -1: a < b\n 0: a = b\n 1: a > b\n and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */\n\n if ((a.compare) &&\n // for \"symmetric results\" force toCSS-based comparison\n // of Quoted or Anonymous if either value is one of those\n !(b.type === 'Quoted' || b.type === 'Anonymous')) {\n return a.compare(b);\n } else if (b.compare) {\n return -b.compare(a);\n } else if (a.type !== b.type) {\n return undefined;\n }\n\n a = a.value;\n b = b.value;\n if (!Array.isArray(a)) {\n return a === b ? 0 : undefined;\n }\n if (a.length !== b.length) {\n return undefined;\n }\n for (let i = 0; i < a.length; i++) {\n if (Node.compare(a[i], b[i]) !== 0) {\n return undefined;\n }\n }\n return 0;\n};\n\nNode.numericCompare = (a, b) => a < b ? -1\n : a === b ? 0\n : a > b ? 1 : undefined;\nexport default Node;\n","import Node from './node';\nimport colors from '../data/colors';\n\n//\n// RGB Colors - #ff0014, #eee\n//\nclass Color extends Node {\n constructor(rgb, a, originalForm) {\n const self = this;\n //\n // The end goal here, is to parse the arguments\n // into an integer triplet, such as `128, 255, 0`\n //\n // This facilitates operations and conversions.\n //\n if (Array.isArray(rgb)) {\n this.rgb = rgb;\n } else if (rgb.length >= 6) {\n this.rgb = [];\n rgb.match(/.{2}/g).map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c, 16));\n } else {\n self.alpha = (parseInt(c, 16)) / 255;\n }\n });\n } else {\n this.rgb = [];\n rgb.split('').map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c + c, 16));\n } else {\n self.alpha = (parseInt(c + c, 16)) / 255;\n }\n });\n }\n this.alpha = this.alpha || (typeof a === 'number' ? a : 1);\n if (typeof originalForm !== 'undefined') {\n this.value = originalForm;\n }\n }\n\n luma() {\n let r = this.rgb[0] / 255;\n let g = this.rgb[1] / 255;\n let b = this.rgb[2] / 255;\n\n r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4);\n g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4);\n b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4);\n\n return 0.2126 * r + 0.7152 * g + 0.0722 * b;\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context, doNotCompress) {\n const compress = context && context.compress && !doNotCompress;\n let color;\n let alpha;\n let colorFunction;\n let args = [];\n\n // `value` is set if this color was originally\n // converted from a named color string so we need\n // to respect this and try to output named color too.\n alpha = this.fround(context, this.alpha);\n\n if (this.value) {\n if (this.value.indexOf('rgb') === 0) {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n } else if (this.value.indexOf('hsl') === 0) {\n if (alpha < 1) {\n colorFunction = 'hsla';\n } else {\n colorFunction = 'hsl';\n }\n } else {\n return this.value;\n }\n } else {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n }\n\n switch (colorFunction) {\n case 'rgba':\n args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1));\n break;\n case 'hsla':\n args.push(clamp(alpha, 1));\n case 'hsl':\n color = this.toHSL();\n args = [\n this.fround(context, color.h),\n `${this.fround(context, color.s * 100)}%`,\n `${this.fround(context, color.l * 100)}%`\n ].concat(args);\n }\n\n if (colorFunction) {\n // Values are capped between `0` and `255`, rounded and zero-padded.\n return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`;\n }\n\n color = this.toRGB();\n\n if (compress) {\n const splitcolor = color.split('');\n\n // Convert color to short format\n if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) {\n color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`;\n }\n }\n\n return color;\n }\n\n //\n // Operations have to be done per-channel, if not,\n // channels will spill onto each other. Once we have\n // our result, in the form of an integer triplet,\n // we create a new Color node to hold the result.\n //\n operate(context, op, other) {\n const rgb = new Array(3);\n const alpha = this.alpha * (1 - other.alpha) + other.alpha;\n for (let c = 0; c < 3; c++) {\n rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]);\n }\n return new Color(rgb, alpha);\n }\n\n toRGB() {\n return toHex(this.rgb);\n }\n\n toHSL() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const l = (max + min) / 2;\n const d = max - min;\n\n if (max === min) {\n h = s = 0;\n } else {\n s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, l, a };\n }\n\n // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript\n toHSV() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const v = max;\n\n const d = max - min;\n if (max === 0) {\n s = 0;\n } else {\n s = d / max;\n }\n\n if (max === min) {\n h = 0;\n } else {\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, v, a };\n }\n\n toARGB() {\n return toHex([this.alpha * 255].concat(this.rgb));\n }\n\n compare(x) {\n return (x.rgb &&\n x.rgb[0] === this.rgb[0] &&\n x.rgb[1] === this.rgb[1] &&\n x.rgb[2] === this.rgb[2] &&\n x.alpha === this.alpha) ? 0 : undefined;\n }\n}\n\nColor.prototype.type = 'Color';\n\nfunction clamp(v, max) {\n return Math.min(Math.max(v, 0), max);\n}\n\nfunction toHex(v) {\n return `#${v.map(c => {\n c = clamp(Math.round(c), 255);\n return (c < 16 ? '0' : '') + c.toString(16);\n}).join('')}`;\n}\n\nColor.fromKeyword = keyword => {\n let c;\n const key = keyword.toLowerCase();\n if (colors.hasOwnProperty(key)) {\n c = new Color(colors[key].slice(1));\n }\n else if (key === 'transparent') {\n c = new Color([0, 0, 0], 0);\n }\n\n if (c) {\n c.value = keyword;\n return c;\n }\n};\nexport default Color;\n","import Node from './node';\n\nclass Paren extends Node {\n constructor(node) {\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n return new Paren(this.value.eval(context));\n }\n}\n\nParen.prototype.type = 'Paren';\nexport default Paren;\n","import Node from './node';\n\nclass Combinator extends Node {\n constructor(value) {\n if (value === ' ') {\n this.value = ' ';\n this.emptyOrWhitespace = true;\n } else {\n this.value = value ? value.trim() : '';\n this.emptyOrWhitespace = this.value === '';\n }\n }\n\n genCSS(context, output) {\n const spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' ';\n output.add(spaceOrEmpty + this.value + spaceOrEmpty);\n }\n}\n\nCombinator.prototype.type = 'Combinator';\nconst _noSpaceCombinators = {\n '': true,\n ' ': true,\n '|': true\n};\nexport default Combinator;\n","import Node from './node';\nimport Paren from './paren';\nimport Combinator from './combinator';\n\nclass Element extends Node {\n constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) {\n this.combinator = combinator instanceof Combinator ?\n combinator : new Combinator(combinator);\n\n if (typeof value === 'string') {\n this.value = value.trim();\n } else if (value) {\n this.value = value;\n } else {\n this.value = '';\n }\n this.isVariable = isVariable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.combinator, this);\n }\n\n accept(visitor) {\n const value = this.value;\n this.combinator = visitor.visit(this.combinator);\n if (typeof value === 'object') {\n this.value = visitor.visit(value);\n }\n }\n\n eval(context) {\n return new Element(this.combinator,\n this.value.eval ? this.value.eval(context) : this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n clone() {\n return new Element(this.combinator,\n this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context), this.fileInfo(), this.getIndex());\n }\n\n toCSS(context = {}) {\n let value = this.value;\n const firstSelector = context.firstSelector;\n if (value instanceof Paren) {\n // selector in parens should not be affected by outer selector\n // flags (breaks only interpolated selectors - see #1973)\n context.firstSelector = true;\n }\n value = value.toCSS ? value.toCSS(context) : value;\n context.firstSelector = firstSelector;\n if (value === '' && this.combinator.value.charAt(0) === '&') {\n return '';\n } else {\n return this.combinator.toCSS(context) + value;\n }\n }\n}\n\nElement.prototype.type = 'Element';\nexport default Element;\n","\nexport const Math = {\n ALWAYS: 0,\n PARENS_DIVISION: 1,\n PARENS: 2,\n STRICT_LEGACY: 3\n};\n\nexport const RewriteUrls = {\n OFF: 0,\n LOCAL: 1,\n ALL: 2\n};","var clone = (function() {\n'use strict';\n\nfunction _instanceof(obj, type) {\n return type != null && obj instanceof type;\n}\n\nvar nativeMap;\ntry {\n nativeMap = Map;\n} catch(_) {\n // maybe a reference error because no `Map`. Give it a dummy value that no\n // value will ever be an instanceof.\n nativeMap = function() {};\n}\n\nvar nativeSet;\ntry {\n nativeSet = Set;\n} catch(_) {\n nativeSet = function() {};\n}\n\nvar nativePromise;\ntry {\n nativePromise = Promise;\n} catch(_) {\n nativePromise = function() {};\n}\n\n/**\n * Clones (copies) an Object using deep copying.\n *\n * This function supports circular references by default, but if you are certain\n * there are no circular references in your object, you can save some CPU time\n * by calling clone(obj, false).\n *\n * Caution: if `circular` is false and `parent` contains circular references,\n * your program may enter an infinite loop and crash.\n *\n * @param `parent` - the object to be cloned\n * @param `circular` - set to true if the object to be cloned may contain\n * circular references. (optional - true by default)\n * @param `depth` - set to a number if the object is only to be cloned to\n * a particular depth. (optional - defaults to Infinity)\n * @param `prototype` - sets the prototype to be used when cloning an object.\n * (optional - defaults to parent prototype).\n * @param `includeNonEnumerable` - set to true if the non-enumerable properties\n * should be cloned as well. Non-enumerable properties on the prototype\n * chain will be ignored. (optional - false by default)\n*/\nfunction clone(parent, circular, depth, prototype, includeNonEnumerable) {\n if (typeof circular === 'object') {\n depth = circular.depth;\n prototype = circular.prototype;\n includeNonEnumerable = circular.includeNonEnumerable;\n circular = circular.circular;\n }\n // maintain two arrays for circular references, where corresponding parents\n // and children have the same index\n var allParents = [];\n var allChildren = [];\n\n var useBuffer = typeof Buffer != 'undefined';\n\n if (typeof circular == 'undefined')\n circular = true;\n\n if (typeof depth == 'undefined')\n depth = Infinity;\n\n // recurse this function so we don't reset allParents and allChildren\n function _clone(parent, depth) {\n // cloning null always returns null\n if (parent === null)\n return null;\n\n if (depth === 0)\n return parent;\n\n var child;\n var proto;\n if (typeof parent != 'object') {\n return parent;\n }\n\n if (_instanceof(parent, nativeMap)) {\n child = new nativeMap();\n } else if (_instanceof(parent, nativeSet)) {\n child = new nativeSet();\n } else if (_instanceof(parent, nativePromise)) {\n child = new nativePromise(function (resolve, reject) {\n parent.then(function(value) {\n resolve(_clone(value, depth - 1));\n }, function(err) {\n reject(_clone(err, depth - 1));\n });\n });\n } else if (clone.__isArray(parent)) {\n child = [];\n } else if (clone.__isRegExp(parent)) {\n child = new RegExp(parent.source, __getRegExpFlags(parent));\n if (parent.lastIndex) child.lastIndex = parent.lastIndex;\n } else if (clone.__isDate(parent)) {\n child = new Date(parent.getTime());\n } else if (useBuffer && Buffer.isBuffer(parent)) {\n if (Buffer.allocUnsafe) {\n // Node.js >= 4.5.0\n child = Buffer.allocUnsafe(parent.length);\n } else {\n // Older Node.js versions\n child = new Buffer(parent.length);\n }\n parent.copy(child);\n return child;\n } else if (_instanceof(parent, Error)) {\n child = Object.create(parent);\n } else {\n if (typeof prototype == 'undefined') {\n proto = Object.getPrototypeOf(parent);\n child = Object.create(proto);\n }\n else {\n child = Object.create(prototype);\n proto = prototype;\n }\n }\n\n if (circular) {\n var index = allParents.indexOf(parent);\n\n if (index != -1) {\n return allChildren[index];\n }\n allParents.push(parent);\n allChildren.push(child);\n }\n\n if (_instanceof(parent, nativeMap)) {\n parent.forEach(function(value, key) {\n var keyChild = _clone(key, depth - 1);\n var valueChild = _clone(value, depth - 1);\n child.set(keyChild, valueChild);\n });\n }\n if (_instanceof(parent, nativeSet)) {\n parent.forEach(function(value) {\n var entryChild = _clone(value, depth - 1);\n child.add(entryChild);\n });\n }\n\n for (var i in parent) {\n var attrs;\n if (proto) {\n attrs = Object.getOwnPropertyDescriptor(proto, i);\n }\n\n if (attrs && attrs.set == null) {\n continue;\n }\n child[i] = _clone(parent[i], depth - 1);\n }\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(parent);\n for (var i = 0; i < symbols.length; i++) {\n // Don't need to worry about cloning a symbol because it is a primitive,\n // like a number or string.\n var symbol = symbols[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, symbol);\n if (descriptor && !descriptor.enumerable && !includeNonEnumerable) {\n continue;\n }\n child[symbol] = _clone(parent[symbol], depth - 1);\n if (!descriptor.enumerable) {\n Object.defineProperty(child, symbol, {\n enumerable: false\n });\n }\n }\n }\n\n if (includeNonEnumerable) {\n var allPropertyNames = Object.getOwnPropertyNames(parent);\n for (var i = 0; i < allPropertyNames.length; i++) {\n var propertyName = allPropertyNames[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, propertyName);\n if (descriptor && descriptor.enumerable) {\n continue;\n }\n child[propertyName] = _clone(parent[propertyName], depth - 1);\n Object.defineProperty(child, propertyName, {\n enumerable: false\n });\n }\n }\n\n return child;\n }\n\n return _clone(parent, depth);\n}\n\n/**\n * Simple flat clone using prototype, accepts only objects, usefull for property\n * override on FLAT configuration object (no nested props).\n *\n * USE WITH CAUTION! This may not behave as you wish if you do not know how this\n * works.\n */\nclone.clonePrototype = function clonePrototype(parent) {\n if (parent === null)\n return null;\n\n var c = function () {};\n c.prototype = parent;\n return new c();\n};\n\n// private utility functions\n\nfunction __objToStr(o) {\n return Object.prototype.toString.call(o);\n}\nclone.__objToStr = __objToStr;\n\nfunction __isDate(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Date]';\n}\nclone.__isDate = __isDate;\n\nfunction __isArray(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Array]';\n}\nclone.__isArray = __isArray;\n\nfunction __isRegExp(o) {\n return typeof o === 'object' && __objToStr(o) === '[object RegExp]';\n}\nclone.__isRegExp = __isRegExp;\n\nfunction __getRegExpFlags(re) {\n var flags = '';\n if (re.global) flags += 'g';\n if (re.ignoreCase) flags += 'i';\n if (re.multiline) flags += 'm';\n return flags;\n}\nclone.__getRegExpFlags = __getRegExpFlags;\n\nreturn clone;\n})();\n\nif (typeof module === 'object' && module.exports) {\n module.exports = clone;\n}\n","/* jshint proto: true */\nimport * as Constants from './constants';\nimport CloneHelper from 'clone';\n\nexport function getLocation(index, inputStream) {\n let n = index + 1;\n let line = null;\n let column = -1;\n\n while (--n >= 0 && inputStream.charAt(n) !== '\\n') {\n column++;\n }\n\n if (typeof index === 'number') {\n line = (inputStream.slice(0, index).match(/\\n/g) || '').length;\n }\n\n return {\n line,\n column\n };\n}\nexport function copyArray(arr) {\n let i;\n const length = arr.length;\n const copy = new Array(length);\n\n for (i = 0; i < length; i++) {\n copy[i] = arr[i];\n }\n return copy;\n}\nexport function clone(obj) {\n const cloned = {};\n for (const prop in obj) {\n if (obj.hasOwnProperty(prop)) {\n cloned[prop] = obj[prop];\n }\n }\n return cloned;\n}\nexport function copyOptions(obj1, obj2) {\n if (obj2 && obj2._defaults) {\n return obj2;\n }\n const opts = utils.defaults(obj1, obj2);\n if (opts.strictMath) {\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n // Back compat with changed relativeUrls option\n if (opts.relativeUrls) {\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n }\n if (typeof opts.math === 'string') {\n switch (opts.math.toLowerCase()) {\n case 'always':\n opts.math = Constants.Math.ALWAYS;\n break;\n case 'parens-division':\n opts.math = Constants.Math.PARENS_DIVISION;\n break;\n case 'strict':\n case 'parens':\n opts.math = Constants.Math.PARENS;\n break;\n case 'strict-legacy':\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n }\n if (typeof opts.rewriteUrls === 'string') {\n switch (opts.rewriteUrls.toLowerCase()) {\n case 'off':\n opts.rewriteUrls = Constants.RewriteUrls.OFF;\n break;\n case 'local':\n opts.rewriteUrls = Constants.RewriteUrls.LOCAL;\n break;\n case 'all':\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n break;\n }\n }\n return opts;\n}\nexport function defaults(obj1, obj2) {\n let newObj = obj2 || {};\n if (!obj2._defaults) {\n newObj = {};\n const defaults = CloneHelper(obj1);\n newObj._defaults = defaults;\n const cloned = obj2 ? CloneHelper(obj2) : {};\n Object.assign(newObj, defaults, cloned);\n }\n return newObj;\n}\nexport function merge(obj1, obj2) {\n for (const prop in obj2) {\n if (obj2.hasOwnProperty(prop)) {\n obj1[prop] = obj2[prop];\n }\n }\n return obj1;\n}\nexport function flattenArray(arr, result = []) {\n for (let i = 0, length = arr.length; i < length; i++) {\n const value = arr[i];\n if (Array.isArray(value)) {\n utils.flattenArray(value, result);\n } else {\n if (value !== undefined) {\n result.push(value);\n }\n }\n }\n return result;\n}","import * as utils from './utils';\n/**\n * This is a centralized class of any error that could be thrown internally (mostly by the parser).\n * Besides standard .message it keeps some additional data like a path to the file where the error\n * occurred along with line and column numbers.\n *\n * @class\n * @extends Error\n * @type {module.LessError}\n *\n * @prop {string} type\n * @prop {string} filename\n * @prop {number} index\n * @prop {number} line\n * @prop {number} column\n * @prop {number} callLine\n * @prop {number} callExtract\n * @prop {string[]} extract\n *\n * @param {Object} e - An error object to wrap around or just a descriptive object\n * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager?\n * @param {string} [currentFilename]\n */\nconst LessError = function LessError(e, fileContentMap, currentFilename) {\n Error.call(this);\n\n const filename = e.filename || currentFilename;\n\n this.message = e.message;\n this.stack = e.stack;\n\n if (fileContentMap && filename) {\n const input = fileContentMap.contents[filename];\n const loc = utils.getLocation(e.index, input);\n const line = loc.line;\n const col = loc.column;\n const callLine = e.call && utils.getLocation(e.call, input).line;\n const lines = input ? input.split('\\n') : '';\n\n this.type = e.type || 'Syntax';\n this.filename = filename;\n this.index = e.index;\n this.line = typeof line === 'number' ? line + 1 : null;\n this.column = col;\n\n if (!this.line && this.stack) {\n const found = this.stack.match(/(|Function):(\\d+):(\\d+)/);\n\n if (found) {\n if (found[2]) {\n this.line = parseInt(found[2]) - 2;\n }\n if (found[3]) {\n this.column = parseInt(found[3]);\n }\n }\n }\n\n this.callLine = callLine + 1;\n this.callExtract = lines[callLine];\n\n this.extract = [\n lines[this.line - 2],\n lines[this.line - 1],\n lines[this.line]\n ];\n }\n\n};\n\nif (typeof Object.create === 'undefined') {\n const F = () => {};\n F.prototype = Error.prototype;\n LessError.prototype = new F();\n} else {\n LessError.prototype = Object.create(Error.prototype);\n}\n\nLessError.prototype.constructor = LessError;\n\n/**\n * An overridden version of the default Object.prototype.toString\n * which uses additional information to create a helpful message.\n *\n * @param {Object} options\n * @returns {string}\n */\nLessError.prototype.toString = function(options = {}) {\n let message = '';\n const extract = this.extract || [];\n let error = [];\n let stylize = str => str;\n if (options.stylize) {\n const type = typeof options.stylize;\n if (type !== 'function') {\n throw Error(`options.stylize should be a function, got a ${type}!`);\n }\n stylize = options.stylize;\n }\n\n if (this.line !== null) {\n if (typeof extract[0] === 'string') {\n error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey'));\n }\n\n if (typeof extract[1] === 'string') {\n let errorTxt = `${this.line} `;\n if (extract[1]) {\n errorTxt += extract[1].slice(0, this.column) +\n stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') +\n extract[1].slice(this.column + 1), 'red'), 'inverse');\n }\n error.push(errorTxt);\n }\n\n if (typeof extract[2] === 'string') {\n error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey'));\n }\n error = `${error.join('\\n') + stylize('', 'reset')}\\n`;\n }\n\n message += stylize(`${this.type}Error: ${this.message}`, 'red');\n if (this.filename) {\n message += stylize(' in ', 'red') + this.filename;\n }\n if (this.line) {\n message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey');\n }\n\n message += `\\n${error}`;\n\n if (this.callLine) {\n message += `${stylize('from ', 'red') + (this.filename || '')}/n`;\n message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`;\n }\n\n return message;\n};\n\nexport default LessError;","import Node from './node';\nimport Element from './element';\nimport LessError from '../less-error';\n\nclass Selector extends Node {\n constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) {\n this.extendList = extendList;\n this.condition = condition;\n this.evaldCondition = !condition;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.elements = this.getElements(elements);\n this.mixinElements_ = undefined;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.elements, this);\n }\n\n accept(visitor) {\n if (this.elements) {\n this.elements = visitor.visitArray(this.elements);\n }\n if (this.extendList) {\n this.extendList = visitor.visitArray(this.extendList);\n }\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n createDerived(elements, extendList, evaldCondition) {\n elements = this.getElements(elements);\n const newSelector = new Selector(elements, extendList || this.extendList,\n null, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition;\n newSelector.mediaEmpty = this.mediaEmpty;\n return newSelector;\n }\n\n getElements(els) {\n if (!els) {\n return [new Element('', '&', false, this._index, this._fileInfo)];\n }\n if (typeof els === 'string') {\n this.parse.parseNode(\n els, \n ['selector'],\n this._index, \n this._fileInfo, \n function(err, result) {\n if (err) {\n throw new LessError({\n index: err.index,\n message: err.message\n }, this.parse.imports, this._fileInfo.filename);\n }\n els = result[0].elements;\n });\n }\n return els;\n }\n\n createEmptySelectors() {\n const el = new Element('', '&', false, this._index, this._fileInfo);\n const sels = [new Selector([el], null, null, this._index, this._fileInfo)];\n sels[0].mediaEmpty = true;\n return sels;\n }\n\n match(other) {\n const elements = this.elements;\n const len = elements.length;\n let olen;\n let i;\n\n other = other.mixinElements();\n olen = other.length;\n if (olen === 0 || len < olen) {\n return 0;\n } else {\n for (i = 0; i < olen; i++) {\n if (elements[i].value !== other[i]) {\n return 0;\n }\n }\n }\n\n return olen; // return number of matched elements\n }\n\n mixinElements() {\n if (this.mixinElements_) {\n return this.mixinElements_;\n }\n\n let elements = this.elements.map( v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\\*\\.\\w-]([\\w-]|(\\\\.))*/g);\n\n if (elements) {\n if (elements[0] === '&') {\n elements.shift();\n }\n } else {\n elements = [];\n }\n\n return (this.mixinElements_ = elements);\n }\n\n isJustParentSelector() {\n return !this.mediaEmpty &&\n this.elements.length === 1 &&\n this.elements[0].value === '&' &&\n (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === '');\n }\n\n eval(context) {\n const evaldCondition = this.condition && this.condition.eval(context);\n let elements = this.elements;\n let extendList = this.extendList;\n\n elements = elements && elements.map(e => e.eval(context));\n extendList = extendList && extendList.map(extend => extend.eval(context));\n\n return this.createDerived(elements, extendList, evaldCondition);\n }\n\n genCSS(context, output) {\n let i;\n let element;\n if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') {\n output.add(' ', this.fileInfo(), this.getIndex());\n }\n for (i = 0; i < this.elements.length; i++) {\n element = this.elements[i];\n element.genCSS(context, output);\n }\n }\n\n getIsOutput() {\n return this.evaldCondition;\n }\n}\n\nSelector.prototype.type = 'Selector';\nexport default Selector;\n","import Node from './node';\n\nclass Value extends Node {\n constructor(value) {\n if (!value) {\n throw new Error('Value requires an array argument');\n }\n if (!Array.isArray(value)) {\n this.value = [ value ];\n }\n else {\n this.value = value;\n }\n }\n\n accept(visitor) {\n if (this.value) {\n this.value = visitor.visitArray(this.value);\n }\n }\n\n eval(context) {\n if (this.value.length === 1) {\n return this.value[0].eval(context);\n } else {\n return new Value(this.value.map(v => v.eval(context)));\n }\n }\n\n genCSS(context, output) {\n let i;\n for (i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (i + 1 < this.value.length) {\n output.add((context && context.compress) ? ',' : ', ');\n }\n }\n }\n}\n\nValue.prototype.type = 'Value';\nexport default Value;\n","import Node from './node';\n\nclass Keyword extends Node {\n constructor(value) { this.value = value; }\n\n genCSS(context, output) {\n if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; }\n output.add(this.value);\n }\n}\n\nKeyword.prototype.type = 'Keyword';\n\nKeyword.True = new Keyword('true');\nKeyword.False = new Keyword('false');\n\nexport default Keyword;\n","import Node from './node';\n\nclass Anonymous extends Node {\n constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) {\n this.value = value;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.mapLines = mapLines;\n this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike;\n this.allowRoot = true;\n this.copyVisibilityInfo(visibilityInfo);\n }\n\n eval() {\n return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo());\n }\n\n compare(other) {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n\n isRulesetLike() {\n return this.rulesetLike;\n }\n\n genCSS(context, output) {\n this.nodeVisible = Boolean(this.value);\n if (this.nodeVisible) {\n output.add(this.value, this._fileInfo, this._index, this.mapLines);\n }\n }\n}\n\nAnonymous.prototype.type = 'Anonymous';\nexport default Anonymous;\n","import Node from './node';\nimport Value from './value';\nimport Keyword from './keyword';\nimport Anonymous from './anonymous';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Declaration extends Node {\n constructor(name, value, important, merge, index, currentFileInfo, inline, variable) {\n this.name = name;\n this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]);\n this.important = important ? ` ${important.trim()}` : '';\n this.merge = merge;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.inline = inline || false;\n this.variable = (variable !== undefined) ? variable\n : (name.charAt && (name.charAt(0) === '@'));\n this.allowRoot = true;\n this.setParent(this.value, this);\n }\n\n genCSS(context, output) {\n output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex());\n try {\n this.value.genCSS(context, output);\n }\n catch (e) {\n e.index = this._index;\n e.filename = this._fileInfo.filename;\n throw e;\n }\n output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index);\n }\n\n eval(context) {\n let mathBypass = false;\n let prevMath;\n let name = this.name;\n let evaldValue;\n let variable = this.variable;\n if (typeof name !== 'string') {\n // expand 'primitive' name directly to get\n // things faster (~10% for benchmark.less):\n name = (name.length === 1) && (name[0] instanceof Keyword) ?\n name[0].value : evalName(context, name);\n variable = false; // never treat expanded interpolation as new variable name\n }\n\n // @todo remove when parens-division is default\n if (name === 'font' && context.math === MATH.ALWAYS) {\n mathBypass = true;\n prevMath = context.math;\n context.math = MATH.PARENS_DIVISION;\n }\n try {\n context.importantScope.push({});\n evaldValue = this.value.eval(context);\n\n if (!this.variable && evaldValue.type === 'DetachedRuleset') {\n throw { message: 'Rulesets cannot be evaluated on a property.',\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n let important = this.important;\n const importantResult = context.importantScope.pop();\n if (!important && importantResult.important) {\n important = importantResult.important;\n }\n\n return new Declaration(name,\n evaldValue,\n important,\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline,\n variable);\n }\n catch (e) {\n if (typeof e.index !== 'number') {\n e.index = this.getIndex();\n e.filename = this.fileInfo().filename;\n }\n throw e;\n }\n finally {\n if (mathBypass) {\n context.math = prevMath;\n }\n }\n }\n\n makeImportant() {\n return new Declaration(this.name,\n this.value,\n '!important',\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline);\n }\n}\n\nfunction evalName(context, name) {\n let value = '';\n let i;\n const n = name.length;\n const output = {add: function (s) {value += s;}};\n for (i = 0; i < n; i++) {\n name[i].eval(context).genCSS(context, output);\n }\n return value;\n}\n\nDeclaration.prototype.type = 'Declaration';\nexport default Declaration;","const debugInfo = (context, ctx, lineSeparator) => {\n let result = '';\n if (context.dumpLineNumbers && !context.compress) {\n switch (context.dumpLineNumbers) {\n case 'comments':\n result = debugInfo.asComment(ctx);\n break;\n case 'mediaquery':\n result = debugInfo.asMediaQuery(ctx);\n break;\n case 'all':\n result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx);\n break;\n }\n }\n return result;\n};\n\ndebugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\\n`;\n\ndebugInfo.asMediaQuery = ctx => {\n let filenameWithProtocol = ctx.debugInfo.fileName;\n if (!/^[a-z]+:\\/\\//i.test(filenameWithProtocol)) {\n filenameWithProtocol = `file://${filenameWithProtocol}`;\n }\n return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\\/\\\\])/g, a => {\n if (a == '\\\\') {\n a = '\\/';\n }\n return `\\\\${a}`;\n})}}line{font-family:\\\\00003${ctx.debugInfo.lineNumber}}}\\n`;\n};\n\nexport default debugInfo;\n","import Node from './node';\nimport getDebugInfo from './debug-info';\n\nclass Comment extends Node {\n constructor(value, isLineComment, index, currentFileInfo) {\n this.value = value;\n this.isLineComment = isLineComment;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n genCSS(context, output) {\n if (this.debugInfo) {\n output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n }\n\n isSilent(context) {\n const isCompressed = context.compress && this.value[2] !== '!';\n return this.isLineComment || isCompressed;\n }\n}\n\nComment.prototype.type = 'Comment';\nexport default Comment;\n","const contexts = {};\nexport default contexts;\nimport * as Constants from './constants';\n\nconst copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) {\n if (!original) { return; }\n\n for (let i = 0; i < propertiesToCopy.length; i++) {\n if (original.hasOwnProperty(propertiesToCopy[i])) {\n destination[propertiesToCopy[i]] = original[propertiesToCopy[i]];\n }\n }\n};\n\n/*\n parse is used whilst parsing\n */\nconst parseCopyProperties = [\n // options\n 'paths', // option - unmodified - paths to search for imports on\n 'rewriteUrls', // option - whether to adjust URL's to be relative\n 'rootpath', // option - rootpath to append to URL's\n 'strictImports', // option -\n 'insecure', // option - whether to allow imports from insecure ssl hosts\n 'dumpLineNumbers', // option - whether to dump line numbers\n 'compress', // option - whether to compress\n 'syncImport', // option - whether to import synchronously\n 'chunkInput', // option - whether to chunk input. more performant but causes parse issues.\n 'mime', // browser only - mime type for sheet import\n 'useFileCache', // browser only - whether to use the per file session cache\n // context\n 'processImports', // option & context - whether to process imports. if false then imports will not be imported.\n // Used by the import manager to stop multiple import visitors being created.\n 'pluginManager' // Used as the plugin manager for the session\n];\n\ncontexts.Parse = function(options) {\n copyFromOriginal(options, this, parseCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n};\n\nconst evalCopyProperties = [\n 'paths', // additional include paths\n 'compress', // whether to compress\n 'ieCompat', // whether to enforce IE compatibility (IE8 data-uri)\n 'math', // whether math has to be within parenthesis\n 'strictUnits', // whether units need to evaluate correctly\n 'sourceMap', // whether to output a source map\n 'importMultiple', // whether we are currently importing multiple copies\n 'urlArgs', // whether to add args into url tokens\n 'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false\n 'pluginManager', // Used as the plugin manager for the session\n 'importantScope', // used to bubble up !important statements\n 'rewriteUrls' // option - whether to adjust URL's to be relative\n];\n\ncontexts.Eval = function(options, frames) {\n copyFromOriginal(options, this, evalCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n\n this.frames = frames || [];\n this.importantScope = this.importantScope || [];\n};\n\ncontexts.Eval.prototype.enterCalc = function () {\n if (!this.calcStack) {\n this.calcStack = [];\n }\n this.calcStack.push(true);\n this.inCalc = true;\n};\n\ncontexts.Eval.prototype.exitCalc = function () {\n this.calcStack.pop();\n if (!this.calcStack) {\n this.inCalc = false;\n }\n};\n\ncontexts.Eval.prototype.inParenthesis = function () {\n if (!this.parensStack) {\n this.parensStack = [];\n }\n this.parensStack.push(true);\n};\n\ncontexts.Eval.prototype.outOfParenthesis = function () {\n this.parensStack.pop();\n};\n\ncontexts.Eval.prototype.inCalc = false;\ncontexts.Eval.prototype.mathOn = true;\ncontexts.Eval.prototype.isMathOn = function (op) {\n if (!this.mathOn) {\n return false;\n }\n if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) {\n return false;\n }\n if (this.math > Constants.Math.PARENS_DIVISION) {\n return this.parensStack && this.parensStack.length;\n }\n return true;\n};\n\ncontexts.Eval.prototype.pathRequiresRewrite = function (path) {\n const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative;\n\n return isRelative(path);\n};\n\ncontexts.Eval.prototype.rewritePath = function (path, rootpath) {\n let newPath;\n\n rootpath = rootpath || '';\n newPath = this.normalizePath(rootpath + path);\n\n // If a path was explicit relative and the rootpath was not an absolute path\n // we must ensure that the new path is also explicit relative.\n if (isPathLocalRelative(path) &&\n isPathRelative(rootpath) &&\n isPathLocalRelative(newPath) === false) {\n newPath = `./${newPath}`;\n }\n\n return newPath;\n};\n\ncontexts.Eval.prototype.normalizePath = path => {\n const segments = path.split('/').reverse();\n let segment;\n\n path = [];\n while (segments.length !== 0) {\n segment = segments.pop();\n switch ( segment ) {\n case '.':\n break;\n case '..':\n if ((path.length === 0) || (path[path.length - 1] === '..')) {\n path.push( segment );\n } else {\n path.pop();\n }\n break;\n default:\n path.push(segment);\n break;\n }\n }\n\n return path.join('/');\n};\n\nfunction isPathRelative(path) {\n return !/^(?:[a-z-]+:|\\/|#)/i.test(path);\n}\n\nfunction isPathLocalRelative(path) {\n return path.charAt(0) === '.';\n}\n\n// todo - do the same for the toCSS ?\n","function makeRegistry( base ) {\n return {\n _data: {},\n add: function(name, func) {\n // precautionary case conversion, as later querying of\n // the registry by function-caller uses lower case as well.\n name = name.toLowerCase();\n\n if (this._data.hasOwnProperty(name)) {\n // TODO warn\n }\n this._data[name] = func;\n },\n addMultiple: function(functions) {\n Object.keys(functions).forEach(\n name => {\n this.add(name, functions[name]);\n });\n },\n get: function(name) {\n return this._data[name] || ( base && base.get( name ));\n },\n getLocalFunctions: function() {\n return this._data;\n },\n inherit: function() {\n return makeRegistry( this );\n },\n create: function(base) {\n return makeRegistry(base);\n }\n };\n}\n\nexport default makeRegistry( null );","import Keyword from '../tree/keyword';\n\nconst defaultFunc = {\n eval: function () {\n const v = this.value_;\n const e = this.error_;\n if (e) {\n throw e;\n }\n if (v != null) {\n return v ? Keyword.True : Keyword.False;\n }\n },\n value: function (v) {\n this.value_ = v;\n },\n error: function (e) {\n this.error_ = e;\n },\n reset: function () {\n this.value_ = this.error_ = null;\n }\n};\n\nexport default { 'default': defaultFunc.eval.bind(defaultFunc) };\n","import Node from './node';\nimport Declaration from './declaration';\nimport Keyword from './keyword';\nimport Comment from './comment';\nimport Paren from './paren';\nimport Selector from './selector';\nimport Element from './element';\nimport Anonymous from './anonymous';\nimport contexts from '../contexts';\nimport globalFunctionRegistry from '../functions/function-registry';\nimport defaultFunc from '../functions/default';\nimport getDebugInfo from './debug-info';\nimport * as utils from '../utils';\n\nclass Ruleset extends Node {\n constructor(selectors, rules, strictImports, visibilityInfo) {\n this.selectors = selectors;\n this.rules = rules;\n this._lookups = {};\n this._variables = null;\n this._properties = null;\n this.strictImports = strictImports;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n this.setParent(this.selectors, this);\n this.setParent(this.rules, this);\n\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.paths) {\n this.paths = visitor.visitArray(this.paths, true);\n } else if (this.selectors) {\n this.selectors = visitor.visitArray(this.selectors);\n }\n if (this.rules && this.rules.length) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n eval(context) {\n const that = this;\n let selectors;\n let selCnt;\n let selector;\n let i;\n let hasVariable;\n let hasOnePassingSelector = false;\n\n if (this.selectors && (selCnt = this.selectors.length)) {\n selectors = new Array(selCnt);\n defaultFunc.error({\n type: 'Syntax',\n message: 'it is currently only allowed in parametric mixin guards,'\n });\n\n for (i = 0; i < selCnt; i++) {\n selector = this.selectors[i].eval(context);\n for (var j = 0; j < selector.elements.length; j++) {\n if (selector.elements[j].isVariable) {\n hasVariable = true;\n break;\n }\n }\n selectors[i] = selector;\n if (selector.evaldCondition) {\n hasOnePassingSelector = true;\n }\n }\n\n if (hasVariable) {\n const toParseSelectors = new Array(selCnt);\n for (i = 0; i < selCnt; i++) {\n selector = selectors[i];\n toParseSelectors[i] = selector.toCSS(context);\n }\n this.parse.parseNode(\n toParseSelectors.join(','),\n [\"selectors\"], \n selectors[0].getIndex(), \n selectors[0].fileInfo(), \n (err, result) => {\n if (result) {\n selectors = utils.flattenArray(result);\n }\n });\n }\n\n defaultFunc.reset();\n } else {\n hasOnePassingSelector = true;\n }\n\n let rules = this.rules ? utils.copyArray(this.rules) : null;\n const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo());\n let rule;\n let subRule;\n\n ruleset.originalRuleset = this;\n ruleset.root = this.root;\n ruleset.firstRoot = this.firstRoot;\n ruleset.allowImports = this.allowImports;\n\n if (this.debugInfo) {\n ruleset.debugInfo = this.debugInfo;\n }\n\n if (!hasOnePassingSelector) {\n rules.length = 0;\n }\n\n // inherit a function registry from the frames stack when possible;\n // otherwise from the global registry\n ruleset.functionRegistry = (frames => {\n let i = 0;\n const n = frames.length;\n let found;\n for ( ; i !== n ; ++i ) {\n found = frames[ i ].functionRegistry;\n if ( found ) { return found; }\n }\n return globalFunctionRegistry;\n })(context.frames).inherit();\n\n // push the current ruleset to the frames stack\n const ctxFrames = context.frames;\n ctxFrames.unshift(ruleset);\n\n // currrent selectors\n let ctxSelectors = context.selectors;\n if (!ctxSelectors) {\n context.selectors = ctxSelectors = [];\n }\n ctxSelectors.unshift(this.selectors);\n\n // Evaluate imports\n if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {\n ruleset.evalImports(context);\n }\n\n // Store the frames around mixin definitions,\n // so they can be evaluated like closures when the time comes.\n const rsRules = ruleset.rules;\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.evalFirst) {\n rsRules[i] = rule.eval(context);\n }\n }\n\n const mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0;\n\n // Evaluate mixin calls.\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.type === 'MixinCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope if the variable is\n // already there. consider returning false here\n // but we need a way to \"return\" variable from mixins\n return !(ruleset.variable(r.name));\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n } else if (rule.type === 'VariableCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).rules.filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope at all\n return false;\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n if (!rule.evalFirst) {\n rsRules[i] = rule = rule.eval ? rule.eval(context) : rule;\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n // for rulesets, check if it is a css guard and can be removed\n if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) {\n // check if it can be folded in (e.g. & where)\n if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) {\n rsRules.splice(i--, 1);\n\n for (var j = 0; (subRule = rule.rules[j]); j++) {\n if (subRule instanceof Node) {\n subRule.copyVisibilityInfo(rule.visibilityInfo());\n if (!(subRule instanceof Declaration) || !subRule.variable) {\n rsRules.splice(++i, 0, subRule);\n }\n }\n }\n }\n }\n }\n\n // Pop the stack\n ctxFrames.shift();\n ctxSelectors.shift();\n\n if (context.mediaBlocks) {\n for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) {\n context.mediaBlocks[i].bubbleSelectors(selectors);\n }\n }\n\n return ruleset;\n }\n\n evalImports(context) {\n const rules = this.rules;\n let i;\n let importRules;\n if (!rules) { return; }\n\n for (i = 0; i < rules.length; i++) {\n if (rules[i].type === 'Import') {\n importRules = rules[i].eval(context);\n if (importRules && (importRules.length || importRules.length === 0)) {\n rules.splice(...[i, 1].concat(importRules));\n i += importRules.length - 1;\n } else {\n rules.splice(i, 1, importRules);\n }\n this.resetCache();\n }\n }\n }\n\n makeImportant() {\n const result = new Ruleset(this.selectors, this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant();\n } else {\n return r;\n }\n }), this.strictImports, this.visibilityInfo());\n\n return result;\n }\n\n matchArgs(args) {\n return !args || args.length === 0;\n }\n\n // lets you call a css selector with a guard\n matchCondition(args, context) {\n const lastSelector = this.selectors[this.selectors.length - 1];\n if (!lastSelector.evaldCondition) {\n return false;\n }\n if (lastSelector.condition &&\n !lastSelector.condition.eval(\n new contexts.Eval(context,\n context.frames))) {\n return false;\n }\n return true;\n }\n\n resetCache() {\n this._rulesets = null;\n this._variables = null;\n this._properties = null;\n this._lookups = {};\n }\n\n variables() {\n if (!this._variables) {\n this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable === true) {\n hash[r.name] = r;\n }\n // when evaluating variables in an import statement, imports have not been eval'd\n // so we need to go inside import statements.\n // guard against root being a string (in the case of inlined less)\n if (r.type === 'Import' && r.root && r.root.variables) {\n const vars = r.root.variables();\n for (const name in vars) {\n if (vars.hasOwnProperty(name)) {\n hash[name] = r.root.variable(name);\n }\n }\n }\n return hash;\n }, {});\n }\n return this._variables;\n }\n\n properties() {\n if (!this._properties) {\n this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable !== true) {\n const name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ?\n r.name[0].value : r.name;\n // Properties don't overwrite as they can merge\n if (!hash[`$${name}`]) {\n hash[`$${name}`] = [ r ];\n }\n else {\n hash[`$${name}`].push(r);\n }\n }\n return hash;\n }, {});\n }\n return this._properties;\n }\n\n variable(name) {\n const decl = this.variables()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n property(name) {\n const decl = this.properties()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n lastDeclaration() {\n for (let i = this.rules.length; i > 0; i--) {\n const decl = this.rules[i - 1];\n if (decl instanceof Declaration) {\n return this.parseValue(decl);\n }\n }\n }\n\n parseValue(toParse) {\n const self = this;\n function transformDeclaration(decl) {\n if (decl.value instanceof Anonymous && !decl.parsed) {\n if (typeof decl.value.value === 'string') {\n this.parse.parseNode(\n decl.value.value,\n ['value', 'important'], \n decl.value.getIndex(), \n decl.fileInfo(), \n (err, result) => {\n if (err) {\n decl.parsed = true;\n }\n if (result) {\n decl.value = result[0];\n decl.important = result[1] || '';\n decl.parsed = true;\n }\n });\n } else {\n decl.parsed = true;\n }\n\n return decl;\n }\n else {\n return decl;\n }\n }\n if (!Array.isArray(toParse)) {\n return transformDeclaration.call(self, toParse);\n }\n else {\n const nodes = [];\n toParse.forEach(n => {\n nodes.push(transformDeclaration.call(self, n));\n });\n return nodes;\n }\n }\n\n rulesets() {\n if (!this.rules) { return []; }\n\n const filtRules = [];\n const rules = this.rules;\n let i;\n let rule;\n\n for (i = 0; (rule = rules[i]); i++) {\n if (rule.isRuleset) {\n filtRules.push(rule);\n }\n }\n\n return filtRules;\n }\n\n prependRule(rule) {\n const rules = this.rules;\n if (rules) {\n rules.unshift(rule);\n } else {\n this.rules = [ rule ];\n }\n this.setParent(rule, this);\n }\n\n find(selector, self = this, filter) {\n const rules = [];\n let match;\n let foundMixins;\n const key = selector.toCSS();\n\n if (key in this._lookups) { return this._lookups[key]; }\n\n this.rulesets().forEach(rule => {\n if (rule !== self) {\n for (let j = 0; j < rule.selectors.length; j++) {\n match = selector.match(rule.selectors[j]);\n if (match) {\n if (selector.elements.length > match) {\n if (!filter || filter(rule)) {\n foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter);\n for (let i = 0; i < foundMixins.length; ++i) {\n foundMixins[i].path.push(rule);\n }\n Array.prototype.push.apply(rules, foundMixins);\n }\n } else {\n rules.push({ rule, path: []});\n }\n break;\n }\n }\n }\n });\n this._lookups[key] = rules;\n return rules;\n }\n\n genCSS(context, output) {\n let i;\n let j;\n const charsetRuleNodes = [];\n let ruleNodes = [];\n\n let // Line number debugging\n debugInfo;\n\n let rule;\n let path;\n\n context.tabLevel = (context.tabLevel || 0);\n\n if (!this.root) {\n context.tabLevel++;\n }\n\n const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' ');\n const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' ');\n let sep;\n\n let charsetNodeIndex = 0;\n let importNodeIndex = 0;\n for (i = 0; (rule = this.rules[i]); i++) {\n if (rule instanceof Comment) {\n if (importNodeIndex === i) {\n importNodeIndex++;\n }\n ruleNodes.push(rule);\n } else if (rule.isCharset && rule.isCharset()) {\n ruleNodes.splice(charsetNodeIndex, 0, rule);\n charsetNodeIndex++;\n importNodeIndex++;\n } else if (rule.type === 'Import') {\n ruleNodes.splice(importNodeIndex, 0, rule);\n importNodeIndex++;\n } else {\n ruleNodes.push(rule);\n }\n }\n ruleNodes = charsetRuleNodes.concat(ruleNodes);\n\n // If this is the root node, we don't render\n // a selector, or {}.\n if (!this.root) {\n debugInfo = getDebugInfo(context, this, tabSetStr);\n\n if (debugInfo) {\n output.add(debugInfo);\n output.add(tabSetStr);\n }\n\n const paths = this.paths;\n const pathCnt = paths.length;\n let pathSubCnt;\n\n sep = context.compress ? ',' : (`,\\n${tabSetStr}`);\n\n for (i = 0; i < pathCnt; i++) {\n path = paths[i];\n if (!(pathSubCnt = path.length)) { continue; }\n if (i > 0) { output.add(sep); }\n\n context.firstSelector = true;\n path[0].genCSS(context, output);\n\n context.firstSelector = false;\n for (j = 1; j < pathSubCnt; j++) {\n path[j].genCSS(context, output);\n }\n }\n\n output.add((context.compress ? '{' : ' {\\n') + tabRuleStr);\n }\n\n // Compile rules and rulesets\n for (i = 0; (rule = ruleNodes[i]); i++) {\n\n if (i + 1 === ruleNodes.length) {\n context.lastRule = true;\n }\n\n const currentLastRule = context.lastRule;\n if (rule.isRulesetLike(rule)) {\n context.lastRule = false;\n }\n\n if (rule.genCSS) {\n rule.genCSS(context, output);\n } else if (rule.value) {\n output.add(rule.value.toString());\n }\n\n context.lastRule = currentLastRule;\n\n if (!context.lastRule && rule.isVisible()) {\n output.add(context.compress ? '' : (`\\n${tabRuleStr}`));\n } else {\n context.lastRule = false;\n }\n }\n\n if (!this.root) {\n output.add((context.compress ? '}' : `\\n${tabSetStr}}`));\n context.tabLevel--;\n }\n\n if (!output.isEmpty() && !context.compress && this.firstRoot) {\n output.add('\\n');\n }\n }\n\n joinSelectors(paths, context, selectors) {\n for (let s = 0; s < selectors.length; s++) {\n this.joinSelector(paths, context, selectors[s]);\n }\n }\n\n joinSelector(paths, context, selector) {\n function createParenthesis(elementsToPak, originalElement) {\n let replacementParen;\n let j;\n if (elementsToPak.length === 0) {\n replacementParen = new Paren(elementsToPak[0]);\n } else {\n const insideParent = new Array(elementsToPak.length);\n for (j = 0; j < elementsToPak.length; j++) {\n insideParent[j] = new Element(\n null,\n elementsToPak[j],\n originalElement.isVariable,\n originalElement._index,\n originalElement._fileInfo\n );\n }\n replacementParen = new Paren(new Selector(insideParent));\n }\n return replacementParen;\n }\n\n function createSelector(containedElement, originalElement) {\n let element;\n let selector;\n element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo);\n selector = new Selector([element]);\n return selector;\n }\n\n // joins selector path from `beginningPath` with selector path in `addPath`\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns concatenated path\n function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) {\n let newSelectorPath;\n let lastSelector;\n let newJoinedSelector;\n // our new selector path\n newSelectorPath = [];\n\n // construct the joined selector - if & is the first thing this will be empty,\n // if not newJoinedSelector will be the last set of elements in the selector\n if (beginningPath.length > 0) {\n newSelectorPath = utils.copyArray(beginningPath);\n lastSelector = newSelectorPath.pop();\n newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements));\n }\n else {\n newJoinedSelector = originalSelector.createDerived([]);\n }\n\n if (addPath.length > 0) {\n // /deep/ is a CSS4 selector - (removed, so should deprecate)\n // that is valid without anything in front of it\n // so if the & does not have a combinator that is \"\" or \" \" then\n // and there is a combinator on the parent, then grab that.\n // this also allows + a { & .b { .a & { ... though not sure why you would want to do that\n let combinator = replacedElement.combinator;\n\n const parentEl = addPath[0].elements[0];\n if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) {\n combinator = parentEl.combinator;\n }\n // join the elements so far with the first part of the parent\n newJoinedSelector.elements.push(new Element(\n combinator,\n parentEl.value,\n replacedElement.isVariable,\n replacedElement._index,\n replacedElement._fileInfo\n ));\n newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1));\n }\n\n // now add the joined selector - but only if it is not empty\n if (newJoinedSelector.elements.length !== 0) {\n newSelectorPath.push(newJoinedSelector);\n }\n\n // put together the parent selectors after the join (e.g. the rest of the parent)\n if (addPath.length > 1) {\n let restOfPath = addPath.slice(1);\n restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, []));\n newSelectorPath = newSelectorPath.concat(restOfPath);\n }\n return newSelectorPath;\n }\n\n // joins selector path from `beginningPath` with every selector path in `addPaths` array\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns array with all concatenated paths\n function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) {\n let j;\n for (j = 0; j < beginningPath.length; j++) {\n const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector);\n result.push(newSelectorPath);\n }\n return result;\n }\n\n function mergeElementsOnToSelectors(elements, selectors) {\n let i;\n let sel;\n\n if (elements.length === 0) {\n return ;\n }\n if (selectors.length === 0) {\n selectors.push([ new Selector(elements) ]);\n return;\n }\n\n for (i = 0; (sel = selectors[i]); i++) {\n // if the previous thing in sel is a parent this needs to join on to it\n if (sel.length > 0) {\n sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements));\n }\n else {\n sel.push(new Selector(elements));\n }\n }\n }\n\n // replace all parent selectors inside `inSelector` by content of `context` array\n // resulting selectors are returned inside `paths` array\n // returns true if `inSelector` contained at least one parent selector\n function replaceParentSelector(paths, context, inSelector) {\n // The paths are [[Selector]]\n // The first list is a list of comma separated selectors\n // The inner list is a list of inheritance separated selectors\n // e.g.\n // .a, .b {\n // .c {\n // }\n // }\n // == [[.a] [.c]] [[.b] [.c]]\n //\n let i;\n\n let j;\n let k;\n let currentElements;\n let newSelectors;\n let selectorsMultiplied;\n let sel;\n let el;\n let hadParentSelector = false;\n let length;\n let lastSelector;\n function findNestedSelector(element) {\n let maybeSelector;\n if (!(element.value instanceof Paren)) {\n return null;\n }\n\n maybeSelector = element.value.value;\n if (!(maybeSelector instanceof Selector)) {\n return null;\n }\n\n return maybeSelector;\n }\n\n // the elements from the current selector so far\n currentElements = [];\n // the current list of new selectors to add to the path.\n // We will build it up. We initiate it with one empty selector as we \"multiply\" the new selectors\n // by the parents\n newSelectors = [\n []\n ];\n\n for (i = 0; (el = inSelector.elements[i]); i++) {\n // non parent reference elements just get added\n if (el.value !== '&') {\n const nestedSelector = findNestedSelector(el);\n if (nestedSelector != null) {\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n const nestedPaths = [];\n let replaced;\n const replacedNewSelectors = [];\n replaced = replaceParentSelector(nestedPaths, context, nestedSelector);\n hadParentSelector = hadParentSelector || replaced;\n // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors\n for (k = 0; k < nestedPaths.length; k++) {\n const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el);\n addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors);\n }\n newSelectors = replacedNewSelectors;\n currentElements = [];\n } else {\n currentElements.push(el);\n }\n\n } else {\n hadParentSelector = true;\n // the new list of selectors to add\n selectorsMultiplied = [];\n\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n // loop through our current selectors\n for (j = 0; j < newSelectors.length; j++) {\n sel = newSelectors[j];\n // if we don't have any parent paths, the & might be in a mixin so that it can be used\n // whether there are parents or not\n if (context.length === 0) {\n // the combinator used on el should now be applied to the next element instead so that\n // it is not lost\n if (sel.length > 0) {\n sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo));\n }\n selectorsMultiplied.push(sel);\n }\n else {\n // and the parent selectors\n for (k = 0; k < context.length; k++) {\n // We need to put the current selectors\n // then join the last selector's elements on to the parents selectors\n const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector);\n // add that to our new set of selectors\n selectorsMultiplied.push(newSelectorPath);\n }\n }\n }\n\n // our new selectors has been multiplied, so reset the state\n newSelectors = selectorsMultiplied;\n currentElements = [];\n }\n }\n\n // if we have any elements left over (e.g. .a& .b == .b)\n // add them on to all the current selectors\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n for (i = 0; i < newSelectors.length; i++) {\n length = newSelectors[i].length;\n if (length > 0) {\n paths.push(newSelectors[i]);\n lastSelector = newSelectors[i][length - 1];\n newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList);\n }\n }\n\n return hadParentSelector;\n }\n\n function deriveSelector(visibilityInfo, deriveFrom) {\n const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition);\n newSelector.copyVisibilityInfo(visibilityInfo);\n return newSelector;\n }\n\n // joinSelector code follows\n let i;\n\n let newPaths;\n let hadParentSelector;\n\n newPaths = [];\n hadParentSelector = replaceParentSelector(newPaths, context, selector);\n\n if (!hadParentSelector) {\n if (context.length > 0) {\n newPaths = [];\n for (i = 0; i < context.length; i++) {\n\n const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo()));\n\n concatenated.push(selector);\n newPaths.push(concatenated);\n }\n }\n else {\n newPaths = [[selector]];\n }\n }\n\n for (i = 0; i < newPaths.length; i++) {\n paths.push(newPaths[i]);\n }\n }\n}\n\nRuleset.prototype.type = 'Ruleset';\nRuleset.prototype.isRuleset = true;\nexport default Ruleset;\n","import Node from './node';\nimport Selector from './selector';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\n\nclass AtRule extends Node {\n constructor(\n name,\n value,\n rules,\n index,\n currentFileInfo,\n debugInfo,\n isRooted,\n visibilityInfo\n ) {\n let i;\n\n this.name = name;\n this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value);\n if (rules) {\n if (Array.isArray(rules)) {\n this.rules = rules;\n } else {\n this.rules = [rules];\n this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors();\n }\n for (i = 0; i < this.rules.length; i++) {\n this.rules[i].allowImports = true;\n }\n this.setParent(this.rules, this);\n }\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.debugInfo = debugInfo;\n this.isRooted = isRooted || false;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n const value = this.value;\n const rules = this.rules;\n if (rules) {\n this.rules = visitor.visitArray(rules);\n }\n if (value) {\n this.value = visitor.visit(value);\n }\n }\n\n isRulesetLike() {\n return this.rules || !this.isCharset();\n }\n\n isCharset() {\n return '@charset' === this.name;\n }\n\n genCSS(context, output) {\n const value = this.value;\n const rules = this.rules;\n output.add(this.name, this.fileInfo(), this.getIndex());\n if (value) {\n output.add(' ');\n value.genCSS(context, output);\n }\n if (rules) {\n this.outputRuleset(context, output, rules);\n } else {\n output.add(';');\n }\n }\n\n eval(context) {\n let mediaPathBackup;\n let mediaBlocksBackup;\n let value = this.value;\n let rules = this.rules;\n\n // media stored inside other atrule should not bubble over it\n // backpup media bubbling information\n mediaPathBackup = context.mediaPath;\n mediaBlocksBackup = context.mediaBlocks;\n // deleted media bubbling information\n context.mediaPath = [];\n context.mediaBlocks = [];\n\n if (value) {\n value = value.eval(context);\n }\n if (rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n rules = [rules[0].eval(context)];\n rules[0].root = true;\n }\n // restore media bubbling information\n context.mediaPath = mediaPathBackup;\n context.mediaBlocks = mediaBlocksBackup;\n\n return new AtRule(this.name, value, rules,\n this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo());\n }\n\n variable(name) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.variable.call(this.rules[0], name);\n }\n }\n\n find(...args) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.find.apply(this.rules[0], args);\n }\n }\n\n rulesets() {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.rulesets.apply(this.rules[0]);\n }\n }\n\n outputRuleset(context, output, rules) {\n const ruleCnt = rules.length;\n let i;\n context.tabLevel = (context.tabLevel | 0) + 1;\n\n // Compressed\n if (context.compress) {\n output.add('{');\n for (i = 0; i < ruleCnt; i++) {\n rules[i].genCSS(context, output);\n }\n output.add('}');\n context.tabLevel--;\n return;\n }\n\n // Non-compressed\n const tabSetStr = `\\n${Array(context.tabLevel).join(' ')}`;\n\n const tabRuleStr = `${tabSetStr} `;\n if (!ruleCnt) {\n output.add(` {${tabSetStr}}`);\n } else {\n output.add(` {${tabRuleStr}`);\n rules[0].genCSS(context, output);\n for (i = 1; i < ruleCnt; i++) {\n output.add(tabRuleStr);\n rules[i].genCSS(context, output);\n }\n output.add(`${tabSetStr}}`);\n }\n\n context.tabLevel--;\n }\n}\n\nAtRule.prototype.type = 'AtRule';\nexport default AtRule;\n","import Node from './node';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass DetachedRuleset extends Node {\n constructor(ruleset, frames) {\n this.ruleset = ruleset;\n this.frames = frames;\n this.setParent(this.ruleset, this);\n }\n\n accept(visitor) {\n this.ruleset = visitor.visit(this.ruleset);\n }\n\n eval(context) {\n const frames = this.frames || utils.copyArray(context.frames);\n return new DetachedRuleset(this.ruleset, frames);\n }\n\n callEval(context) {\n return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context);\n }\n}\n\nDetachedRuleset.prototype.type = 'DetachedRuleset';\nDetachedRuleset.prototype.evalFirst = true;\nexport default DetachedRuleset;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport * as utils from '../utils';\n\nclass Unit extends Node {\n constructor(numerator, denominator, backupUnit) {\n this.numerator = numerator ? utils.copyArray(numerator).sort() : [];\n this.denominator = denominator ? utils.copyArray(denominator).sort() : [];\n if (backupUnit) {\n this.backupUnit = backupUnit;\n } else if (numerator && numerator.length) {\n this.backupUnit = numerator[0];\n }\n }\n\n clone() {\n return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit);\n }\n\n genCSS(context, output) {\n // Dimension checks the unit is singular and throws an error if in strict math mode.\n const strictUnits = context && context.strictUnits;\n if (this.numerator.length === 1) {\n output.add(this.numerator[0]); // the ideal situation\n } else if (!strictUnits && this.backupUnit) {\n output.add(this.backupUnit);\n } else if (!strictUnits && this.denominator.length) {\n output.add(this.denominator[0]);\n }\n }\n\n toString() {\n let i;\n let returnStr = this.numerator.join('*');\n for (i = 0; i < this.denominator.length; i++) {\n returnStr += `/${this.denominator[i]}`;\n }\n return returnStr;\n }\n\n compare(other) {\n return this.is(other.toString()) ? 0 : undefined;\n }\n\n is(unitString) {\n return this.toString().toUpperCase() === unitString.toUpperCase();\n }\n\n isLength() {\n return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS());\n }\n\n isEmpty() {\n return this.numerator.length === 0 && this.denominator.length === 0;\n }\n\n isSingular() {\n return this.numerator.length <= 1 && this.denominator.length === 0;\n }\n\n map(callback) {\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n this.numerator[i] = callback(this.numerator[i], false);\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n this.denominator[i] = callback(this.denominator[i], true);\n }\n }\n\n usedUnits() {\n let group;\n const result = {};\n let mapUnit;\n let groupName;\n\n mapUnit = atomicUnit => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit) && !result[groupName]) {\n result[groupName] = atomicUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in unitConversions) {\n if (unitConversions.hasOwnProperty(groupName)) {\n group = unitConversions[groupName];\n\n this.map(mapUnit);\n }\n }\n\n return result;\n }\n\n cancel() {\n const counter = {};\n let atomicUnit;\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n atomicUnit = this.numerator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) + 1;\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n atomicUnit = this.denominator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) - 1;\n }\n\n this.numerator = [];\n this.denominator = [];\n\n for (atomicUnit in counter) {\n if (counter.hasOwnProperty(atomicUnit)) {\n const count = counter[atomicUnit];\n\n if (count > 0) {\n for (i = 0; i < count; i++) {\n this.numerator.push(atomicUnit);\n }\n } else if (count < 0) {\n for (i = 0; i < -count; i++) {\n this.denominator.push(atomicUnit);\n }\n }\n }\n }\n\n this.numerator.sort();\n this.denominator.sort();\n }\n}\n\nUnit.prototype.type = 'Unit';\nexport default Unit;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport Unit from './unit';\nimport Color from './color';\n\n//\n// A number with a unit\n//\nclass Dimension extends Node {\n constructor(value, unit) {\n this.value = parseFloat(value);\n if (isNaN(this.value)) {\n throw new Error('Dimension is not a number.');\n }\n this.unit = (unit && unit instanceof Unit) ? unit :\n new Unit(unit ? [unit] : undefined);\n this.setParent(this.unit, this);\n }\n\n accept(visitor) {\n this.unit = visitor.visit(this.unit);\n }\n\n eval(context) {\n return this;\n }\n\n toColor() {\n return new Color([this.value, this.value, this.value]);\n }\n\n genCSS(context, output) {\n if ((context && context.strictUnits) && !this.unit.isSingular()) {\n throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`);\n }\n\n const value = this.fround(context, this.value);\n let strValue = String(value);\n\n if (value !== 0 && value < 0.000001 && value > -0.000001) {\n // would be output 1e-6 etc.\n strValue = value.toFixed(20).replace(/0+$/, '');\n }\n\n if (context && context.compress) {\n // Zero values doesn't need a unit\n if (value === 0 && this.unit.isLength()) {\n output.add(strValue);\n return;\n }\n\n // Float values doesn't need a leading zero\n if (value > 0 && value < 1) {\n strValue = (strValue).substr(1);\n }\n }\n\n output.add(strValue);\n this.unit.genCSS(context, output);\n }\n\n // In an operation between two Dimensions,\n // we default to the first Dimension's unit,\n // so `1px + 2` will yield `3px`.\n operate(context, op, other) {\n /* jshint noempty:false */\n let value = this._operate(context, op, this.value, other.value);\n\n let unit = this.unit.clone();\n\n if (op === '+' || op === '-') {\n if (unit.numerator.length === 0 && unit.denominator.length === 0) {\n unit = other.unit.clone();\n if (this.unit.backupUnit) {\n unit.backupUnit = this.unit.backupUnit;\n }\n } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) {\n // do nothing\n } else {\n other = other.convertTo(this.unit.usedUnits());\n\n if (context.strictUnits && other.unit.toString() !== unit.toString()) {\n throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`);\n }\n\n value = this._operate(context, op, this.value, other.value);\n }\n } else if (op === '*') {\n unit.numerator = unit.numerator.concat(other.unit.numerator).sort();\n unit.denominator = unit.denominator.concat(other.unit.denominator).sort();\n unit.cancel();\n } else if (op === '/') {\n unit.numerator = unit.numerator.concat(other.unit.denominator).sort();\n unit.denominator = unit.denominator.concat(other.unit.numerator).sort();\n unit.cancel();\n }\n return new Dimension(value, unit);\n }\n\n compare(other) {\n let a;\n let b;\n\n if (!(other instanceof Dimension)) {\n return undefined;\n }\n\n if (this.unit.isEmpty() || other.unit.isEmpty()) {\n a = this;\n b = other;\n } else {\n a = this.unify();\n b = other.unify();\n if (a.unit.compare(b.unit) !== 0) {\n return undefined;\n }\n }\n\n return Node.numericCompare(a.value, b.value);\n }\n\n unify() {\n return this.convertTo({ length: 'px', duration: 's', angle: 'rad' });\n }\n\n convertTo(conversions) {\n let value = this.value;\n const unit = this.unit.clone();\n let i;\n let groupName;\n let group;\n let targetUnit;\n let derivedConversions = {};\n let applyUnit;\n\n if (typeof conversions === 'string') {\n for (i in unitConversions) {\n if (unitConversions[i].hasOwnProperty(conversions)) {\n derivedConversions = {};\n derivedConversions[i] = conversions;\n }\n }\n conversions = derivedConversions;\n }\n applyUnit = (atomicUnit, denominator) => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit)) {\n if (denominator) {\n value = value / (group[atomicUnit] / group[targetUnit]);\n } else {\n value = value * (group[atomicUnit] / group[targetUnit]);\n }\n\n return targetUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in conversions) {\n if (conversions.hasOwnProperty(groupName)) {\n targetUnit = conversions[groupName];\n group = unitConversions[groupName];\n\n unit.map(applyUnit);\n }\n }\n\n unit.cancel();\n\n return new Dimension(value, unit);\n }\n}\n\nDimension.prototype.type = 'Dimension';\nexport default Dimension;\n","import Node from './node';\nimport Color from './color';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Operation extends Node {\n constructor(op, operands, isSpaced) {\n this.op = op.trim();\n this.operands = operands;\n this.isSpaced = isSpaced;\n }\n\n accept(visitor) {\n this.operands = visitor.visitArray(this.operands);\n }\n\n eval(context) {\n let a = this.operands[0].eval(context);\n let b = this.operands[1].eval(context);\n let op;\n\n if (context.isMathOn(this.op)) {\n op = this.op === './' ? '/' : this.op;\n if (a instanceof Dimension && b instanceof Color) {\n a = a.toColor();\n }\n if (b instanceof Dimension && a instanceof Color) {\n b = b.toColor();\n }\n if (!a.operate) {\n if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n throw { type: 'Operation',\n message: 'Operation on an invalid type' };\n }\n\n return a.operate(context, op, b);\n } else {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n }\n\n genCSS(context, output) {\n this.operands[0].genCSS(context, output);\n if (this.isSpaced) {\n output.add(' ');\n }\n output.add(this.op);\n if (this.isSpaced) {\n output.add(' ');\n }\n this.operands[1].genCSS(context, output);\n }\n}\n\nOperation.prototype.type = 'Operation';\nexport default Operation;\n","import Node from './node';\nimport Paren from './paren';\nimport Comment from './comment';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\nclass Expression extends Node {\n constructor(value, noSpacing) {\n this.value = value;\n this.noSpacing = noSpacing;\n if (!value) {\n throw new Error('Expression requires an array parameter');\n }\n }\n\n accept(visitor) {\n this.value = visitor.visitArray(this.value);\n }\n\n eval(context) {\n let returnValue;\n const mathOn = context.isMathOn();\n\n const inParenthesis = this.parens && \n (context.math !== MATH.STRICT_LEGACY || !this.parensInOp);\n\n let doubleParen = false;\n if (inParenthesis) {\n context.inParenthesis();\n }\n if (this.value.length > 1) {\n returnValue = new Expression(this.value.map(e => {\n if (!e.eval) {\n return e;\n }\n return e.eval(context);\n }), this.noSpacing);\n } else if (this.value.length === 1) {\n if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) {\n doubleParen = true;\n }\n returnValue = this.value[0].eval(context);\n } else {\n returnValue = this;\n }\n if (inParenthesis) {\n context.outOfParenthesis();\n }\n if (this.parens && this.parensInOp && !mathOn && !doubleParen \n && (!(returnValue instanceof Dimension))) {\n returnValue = new Paren(returnValue);\n }\n return returnValue;\n }\n\n genCSS(context, output) {\n for (let i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (!this.noSpacing && i + 1 < this.value.length) {\n output.add(' ');\n }\n }\n }\n\n throwAwayComments() {\n this.value = this.value.filter(v => !(v instanceof Comment));\n }\n}\n\nExpression.prototype.type = 'Expression';\nexport default Expression;\n","import Expression from '../tree/expression';\n\nclass functionCaller {\n constructor(name, context, index, currentFileInfo) {\n this.name = name.toLowerCase();\n this.index = index;\n this.context = context;\n this.currentFileInfo = currentFileInfo;\n\n this.func = context.frames[0].functionRegistry.get(this.name);\n }\n\n isValid() {\n return Boolean(this.func);\n }\n\n call(args) {\n // This code is terrible and should be replaced as per this issue...\n // https://github.com/less/less.js/issues/2477\n if (Array.isArray(args)) {\n args = args.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n })\n .map(item => {\n if (item.type === 'Expression') {\n const subNodes = item.value.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n });\n if (subNodes.length === 1) {\n return subNodes[0];\n } else {\n return new Expression(subNodes);\n }\n }\n return item;\n });\n }\n\n return this.func(...args);\n }\n}\n\nexport default functionCaller;\n","import Node from './node';\nimport Anonymous from './anonymous';\nimport FunctionCaller from '../functions/function-caller';\n\n//\n// A function call node.\n//\nclass Call extends Node {\n constructor(name, args, index, currentFileInfo) {\n this.name = name;\n this.args = args;\n this.calc = name === 'calc';\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n accept(visitor) {\n if (this.args) {\n this.args = visitor.visitArray(this.args);\n }\n }\n\n //\n // When evaluating a function call,\n // we either find the function in the functionRegistry,\n // in which case we call it, passing the evaluated arguments,\n // if this returns null or we cannot find the function, we\n // simply print it out as it appeared originally [2].\n //\n // The reason why we evaluate the arguments, is in the case where\n // we try to pass a variable to a function, like: `saturate(@color)`.\n // The function should receive the value, not the variable.\n //\n eval(context) {\n /**\n * Turn off math for calc(), and switch back on for evaluating nested functions\n */\n const currentMathContext = context.mathOn;\n context.mathOn = !this.calc;\n if (this.calc || context.inCalc) {\n context.enterCalc();\n }\n const args = this.args.map(a => a.eval(context));\n if (this.calc || context.inCalc) {\n context.exitCalc();\n }\n context.mathOn = currentMathContext;\n\n let result;\n const funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo());\n\n if (funcCaller.isValid()) {\n try {\n result = funcCaller.call(args);\n } catch (e) {\n throw { \n type: e.type || 'Runtime',\n message: `error evaluating function \\`${this.name}\\`${e.message ? `: ${e.message}` : ''}`,\n index: this.getIndex(), \n filename: this.fileInfo().filename,\n line: e.lineNumber,\n column: e.columnNumber\n };\n }\n\n if (result !== null && result !== undefined) {\n // Results that that are not nodes are cast as Anonymous nodes\n // Falsy values or booleans are returned as empty nodes\n if (!(result instanceof Node)) {\n if (!result || result === true) {\n result = new Anonymous(null); \n }\n else {\n result = new Anonymous(result.toString()); \n }\n \n }\n result._index = this._index;\n result._fileInfo = this._fileInfo;\n return result;\n }\n\n }\n\n return new Call(this.name, args, this.getIndex(), this.fileInfo());\n }\n\n genCSS(context, output) {\n output.add(`${this.name}(`, this.fileInfo(), this.getIndex());\n\n for (let i = 0; i < this.args.length; i++) {\n this.args[i].genCSS(context, output);\n if (i + 1 < this.args.length) {\n output.add(', ');\n }\n }\n\n output.add(')');\n }\n}\n\nCall.prototype.type = 'Call';\nexport default Call;\n","import Node from './node';\nimport Call from './call';\n\nclass Variable extends Node {\n constructor(name, index, currentFileInfo) {\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let variable;\n let name = this.name;\n\n if (name.indexOf('@@') === 0) {\n name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`;\n }\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive variable definition for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n variable = this.find(context.frames, frame => {\n const v = frame.variable(name);\n if (v) {\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n // If in calc, wrap vars in a function call to cascade evaluate args first\n if (context.inCalc) {\n return (new Call('_SELF', [v.value])).eval(context);\n }\n else {\n return v.value.eval(context);\n }\n }\n });\n if (variable) {\n this.evaluating = false;\n return variable;\n } else {\n throw { type: 'Name',\n message: `variable ${name} is undefined`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nVariable.prototype.type = 'Variable';\nexport default Variable;\n","import Node from './node';\nimport Declaration from './declaration';\n\nclass Property extends Node {\n constructor(name, index, currentFileInfo) {\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let property;\n const name = this.name;\n // TODO: shorten this reference\n const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules;\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive property reference for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n property = this.find(context.frames, frame => {\n let v;\n const vArr = frame.property(name);\n if (vArr) {\n for (let i = 0; i < vArr.length; i++) {\n v = vArr[i];\n\n vArr[i] = new Declaration(v.name,\n v.value,\n v.important,\n v.merge,\n v.index,\n v.currentFileInfo,\n v.inline,\n v.variable\n );\n }\n mergeRules(vArr);\n\n v = vArr[vArr.length - 1];\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n v = v.value.eval(context);\n return v;\n }\n });\n if (property) {\n this.evaluating = false;\n return property;\n } else {\n throw { type: 'Name',\n message: `Property '${name}' is undefined`,\n filename: this.currentFileInfo.filename,\n index: this.index };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nProperty.prototype.type = 'Property';\nexport default Property;\n","import Node from './node';\n\nclass Attribute extends Node {\n constructor(key, op, value) {\n this.key = key;\n this.op = op;\n this.value = value;\n }\n\n eval(context) {\n return new Attribute(this.key.eval ? this.key.eval(context) : this.key,\n this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value);\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context) {\n let value = this.key.toCSS ? this.key.toCSS(context) : this.key;\n\n if (this.op) {\n value += this.op;\n value += (this.value.toCSS ? this.value.toCSS(context) : this.value);\n }\n\n return `[${value}]`;\n }\n}\n\nAttribute.prototype.type = 'Attribute';\nexport default Attribute;\n","import Node from './node';\nimport Variable from './variable';\nimport Property from './property';\n\nclass Quoted extends Node {\n constructor(str, content, escaped, index, currentFileInfo) {\n this.escaped = (escaped == null) ? true : escaped;\n this.value = content || '';\n this.quote = str.charAt(0);\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.variableRegex = /@\\{([\\w-]+)\\}/g;\n this.propRegex = /\\$\\{([\\w-]+)\\}/g;\n }\n\n genCSS(context, output) {\n if (!this.escaped) {\n output.add(this.quote, this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n if (!this.escaped) {\n output.add(this.quote);\n }\n }\n\n containsVariables() {\n return this.value.match(this.variableRegex);\n }\n\n eval(context) {\n const that = this;\n let value = this.value;\n const variableReplacement = (_, name) => {\n const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n const propertyReplacement = (_, name) => {\n const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n function iterativeReplace(value, regexp, replacementFnc) {\n let evaluatedValue = value;\n do {\n value = evaluatedValue.toString();\n evaluatedValue = value.replace(regexp, replacementFnc);\n } while (value !== evaluatedValue);\n return evaluatedValue;\n }\n value = iterativeReplace(value, this.variableRegex, variableReplacement);\n value = iterativeReplace(value, this.propRegex, propertyReplacement);\n return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo());\n }\n\n compare(other) {\n // when comparing quoted strings allow the quote to differ\n if (other.type === 'Quoted' && !this.escaped && !other.escaped) {\n return Node.numericCompare(this.value, other.value);\n } else {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n }\n}\n\nQuoted.prototype.type = 'Quoted';\nexport default Quoted;\n","import Node from './node';\n\nclass URL extends Node {\n constructor(val, index, currentFileInfo, isEvald) {\n this.value = val;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.isEvald = isEvald;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n genCSS(context, output) {\n output.add('url(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n const val = this.value.eval(context);\n let rootpath;\n\n if (!this.isEvald) {\n // Add the rootpath if the URL requires a rewrite\n rootpath = this.fileInfo() && this.fileInfo().rootpath;\n if (typeof rootpath === 'string' &&\n typeof val.value === 'string' &&\n context.pathRequiresRewrite(val.value)) {\n if (!val.quote) {\n rootpath = escapePath(rootpath);\n }\n val.value = context.rewritePath(val.value, rootpath);\n } else {\n val.value = context.normalizePath(val.value);\n }\n\n // Add url args if enabled\n if (context.urlArgs) {\n if (!val.value.match(/^\\s*data:/)) {\n const delimiter = val.value.indexOf('?') === -1 ? '?' : '&';\n const urlArgs = delimiter + context.urlArgs;\n if (val.value.indexOf('#') !== -1) {\n val.value = val.value.replace('#', `${urlArgs}#`);\n } else {\n val.value += urlArgs;\n }\n }\n }\n }\n\n return new URL(val, this.getIndex(), this.fileInfo(), true);\n }\n}\n\nURL.prototype.type = 'Url';\n\nfunction escapePath(path) {\n return path.replace(/[\\(\\)'\"\\s]/g, match => `\\\\${match}`);\n}\n\nexport default URL;\n","import Ruleset from './ruleset';\nimport Value from './value';\nimport Selector from './selector';\nimport Anonymous from './anonymous';\nimport Expression from './expression';\nimport AtRule from './atrule';\nimport * as utils from '../utils';\n\nclass Media extends AtRule {\n constructor(value, features, index, currentFileInfo, visibilityInfo) {\n this._index = index;\n this._fileInfo = currentFileInfo;\n\n const selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors();\n\n this.features = new Value(features);\n this.rules = [new Ruleset(selectors, value)];\n this.rules[0].allowImports = true;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n this.setParent(selectors, this);\n this.setParent(this.features, this);\n this.setParent(this.rules, this);\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n if (this.rules) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n genCSS(context, output) {\n output.add('@media ', this._fileInfo, this._index);\n this.features.genCSS(context, output);\n this.outputRuleset(context, output, this.rules);\n }\n\n eval(context) {\n if (!context.mediaBlocks) {\n context.mediaBlocks = [];\n context.mediaPath = [];\n }\n\n const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo());\n if (this.debugInfo) {\n this.rules[0].debugInfo = this.debugInfo;\n media.debugInfo = this.debugInfo;\n }\n \n media.features = this.features.eval(context);\n\n context.mediaPath.push(media);\n context.mediaBlocks.push(media);\n\n this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit();\n context.frames.unshift(this.rules[0]);\n media.rules = [this.rules[0].eval(context)];\n context.frames.shift();\n\n context.mediaPath.pop();\n\n return context.mediaPath.length === 0 ? media.evalTop(context) :\n media.evalNested(context);\n }\n\n evalTop(context) {\n let result = this;\n\n // Render all dependent Media blocks.\n if (context.mediaBlocks.length > 1) {\n const selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors();\n result = new Ruleset(selectors, context.mediaBlocks);\n result.multiMedia = true;\n result.copyVisibilityInfo(this.visibilityInfo());\n this.setParent(result, this);\n }\n\n delete context.mediaBlocks;\n delete context.mediaPath;\n\n return result;\n }\n\n evalNested(context) {\n let i;\n let value;\n const path = context.mediaPath.concat([this]);\n\n // Extract the media-query conditions separated with `,` (OR).\n for (i = 0; i < path.length; i++) {\n value = path[i].features instanceof Value ?\n path[i].features.value : path[i].features;\n path[i] = Array.isArray(value) ? value : [value];\n }\n\n // Trace all permutations to generate the resulting media-query.\n //\n // (a, b and c) with nested (d, e) ->\n // a and d\n // a and e\n // b and c and d\n // b and c and e\n this.features = new Value(this.permute(path).map(path => {\n path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment));\n\n for (i = path.length - 1; i > 0; i--) {\n path.splice(i, 0, new Anonymous('and'));\n }\n\n return new Expression(path);\n }));\n this.setParent(this.features, this);\n\n // Fake a tree-node that doesn't output anything.\n return new Ruleset([], []);\n }\n\n permute(arr) {\n if (arr.length === 0) {\n return [];\n } else if (arr.length === 1) {\n return arr[0];\n } else {\n const result = [];\n const rest = this.permute(arr.slice(1));\n for (let i = 0; i < rest.length; i++) {\n for (let j = 0; j < arr[0].length; j++) {\n result.push([arr[0][j]].concat(rest[i]));\n }\n }\n return result;\n }\n }\n\n bubbleSelectors(selectors) {\n if (!selectors) {\n return;\n }\n this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])];\n this.setParent(this.rules, this);\n }\n}\n\nMedia.prototype.type = 'Media';\nexport default Media;\n","import Node from './node';\nimport Media from './media';\nimport URL from './url';\nimport Quoted from './quoted';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\nimport * as utils from '../utils';\nimport LessError from '../less-error';\n\n//\n// CSS @import node\n//\n// The general strategy here is that we don't want to wait\n// for the parsing to be completed, before we start importing\n// the file. That's because in the context of a browser,\n// most of the time will be spent waiting for the server to respond.\n//\n// On creation, we push the import path to our import queue, though\n// `import,push`, we also pass it a callback, which it'll call once\n// the file has been fetched, and parsed.\n//\nclass Import extends Node {\n constructor(path, features, options, index, currentFileInfo, visibilityInfo) {\n this.options = options;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.path = path;\n this.features = features;\n this.allowRoot = true;\n\n if (this.options.less !== undefined || this.options.inline) {\n this.css = !this.options.less || this.options.inline;\n } else {\n const pathValue = this.getPath();\n if (pathValue && /[#\\.\\&\\?]css([\\?;].*)?$/.test(pathValue)) {\n this.css = true;\n }\n }\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.features, this);\n this.setParent(this.path, this);\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n this.path = visitor.visit(this.path);\n if (!this.options.isPlugin && !this.options.inline && this.root) {\n this.root = visitor.visit(this.root);\n }\n }\n\n genCSS(context, output) {\n if (this.css && this.path._fileInfo.reference === undefined) {\n output.add('@import ', this._fileInfo, this._index);\n this.path.genCSS(context, output);\n if (this.features) {\n output.add(' ');\n this.features.genCSS(context, output);\n }\n output.add(';');\n }\n }\n\n getPath() {\n return (this.path instanceof URL) ?\n this.path.value.value : this.path.value;\n }\n\n isVariableImport() {\n let path = this.path;\n if (path instanceof URL) {\n path = path.value;\n }\n if (path instanceof Quoted) {\n return path.containsVariables();\n }\n\n return true;\n }\n\n evalForImport(context) {\n let path = this.path;\n\n if (path instanceof URL) {\n path = path.value;\n }\n\n return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo());\n }\n\n evalPath(context) {\n const path = this.path.eval(context);\n const fileInfo = this._fileInfo;\n\n if (!(path instanceof URL)) {\n // Add the rootpath if the URL requires a rewrite\n const pathValue = path.value;\n if (fileInfo &&\n pathValue &&\n context.pathRequiresRewrite(pathValue)) {\n path.value = context.rewritePath(pathValue, fileInfo.rootpath);\n } else {\n path.value = context.normalizePath(path.value);\n }\n }\n\n return path;\n }\n\n eval(context) {\n const result = this.doEval(context);\n if (this.options.reference || this.blocksVisibility()) {\n if (result.length || result.length === 0) {\n result.forEach(node => {\n node.addVisibilityBlock();\n }\n );\n } else {\n result.addVisibilityBlock();\n }\n }\n return result;\n }\n\n doEval(context) {\n let ruleset;\n let registry;\n const features = this.features && this.features.eval(context);\n\n if (this.options.isPlugin) {\n if (this.root && this.root.eval) {\n try {\n this.root.eval(context);\n }\n catch (e) {\n e.message = 'Plugin error during evaluation';\n throw new LessError(e, this.root.imports, this.root.filename);\n }\n }\n registry = context.frames[0] && context.frames[0].functionRegistry;\n if ( registry && this.root && this.root.functions ) {\n registry.addMultiple( this.root.functions );\n }\n\n return [];\n }\n\n if (this.skip) {\n if (typeof this.skip === 'function') {\n this.skip = this.skip();\n }\n if (this.skip) {\n return [];\n }\n }\n if (this.options.inline) {\n const contents = new Anonymous(this.root, 0,\n {\n filename: this.importedFilename,\n reference: this.path._fileInfo && this.path._fileInfo.reference\n }, true, true);\n\n return this.features ? new Media([contents], this.features.value) : [contents];\n } else if (this.css) {\n const newImport = new Import(this.evalPath(context), features, this.options, this._index);\n if (!newImport.css && this.error) {\n throw this.error;\n }\n return newImport;\n } else {\n ruleset = new Ruleset(null, utils.copyArray(this.root.rules));\n ruleset.evalImports(context);\n\n return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules;\n }\n }\n}\n\nImport.prototype.type = 'Import';\nexport default Import;\n","import Node from './node';\nimport Variable from './variable';\n\nconst JsEvalNode = () => {\n};\nJsEvalNode.prototype = new Node();\n\nJsEvalNode.prototype.evaluateJavaScript = function (expression, context) {\n let result;\n const that = this;\n const evalContext = {};\n\n if (!context.javascriptEnabled) {\n throw { message: 'Inline JavaScript is not enabled. Is it set in your options?',\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n expression = expression.replace(/@\\{([\\w-]+)\\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context)));\n\n try {\n expression = new Function(`return (${expression})`);\n } catch (e) {\n throw { message: `JavaScript evaluation error: ${e.message} from \\`${expression}\\`` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n const variables = context.frames[0].variables();\n for (const k in variables) {\n if (variables.hasOwnProperty(k)) {\n /* jshint loopfunc:true */\n evalContext[k.slice(1)] = {\n value: variables[k].value,\n toJS: function () {\n return this.value.eval(context).toCSS();\n }\n };\n }\n }\n\n try {\n result = expression.call(evalContext);\n } catch (e) {\n throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/[\"]/g, '\\'')}'` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n return result;\n};\nJsEvalNode.prototype.jsify = obj => {\n if (Array.isArray(obj.value) && (obj.value.length > 1)) {\n return `[${obj.value.map(v => v.toCSS()).join(', ')}]`;\n } else {\n return obj.toCSS();\n }\n};\n\nexport default JsEvalNode;\n","import JsEvalNode from './js-eval-node';\nimport Dimension from './dimension';\nimport Quoted from './quoted';\nimport Anonymous from './anonymous';\n\nclass JavaScript extends JsEvalNode {\n constructor(string, escaped, index, currentFileInfo) {\n this.escaped = escaped;\n this.expression = string;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n const result = this.evaluateJavaScript(this.expression, context);\n const type = typeof result;\n\n if (type === 'number' && !isNaN(result)) {\n return new Dimension(result);\n } else if (type === 'string') {\n return new Quoted(`\"${result}\"`, result, this.escaped, this._index);\n } else if (Array.isArray(result)) {\n return new Anonymous(result.join(', '));\n } else {\n return new Anonymous(result);\n }\n }\n}\n\nJavaScript.prototype.type = 'JavaScript';\nexport default JavaScript;\n","import Node from './node';\n\nclass Assignment extends Node {\n constructor(key, val) {\n this.key = key;\n this.value = val;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval(context) {\n if (this.value.eval) {\n return new Assignment(this.key, this.value.eval(context));\n }\n return this;\n }\n\n genCSS(context, output) {\n output.add(`${this.key}=`);\n if (this.value.genCSS) {\n this.value.genCSS(context, output);\n } else {\n output.add(this.value);\n }\n }\n}\n\nAssignment.prototype.type = 'Assignment';\nexport default Assignment;\n","import Node from './node';\n\nclass Condition extends Node {\n constructor(op, l, r, i, negate) {\n this.op = op.trim();\n this.lvalue = l;\n this.rvalue = r;\n this._index = i;\n this.negate = negate;\n }\n\n accept(visitor) {\n this.lvalue = visitor.visit(this.lvalue);\n this.rvalue = visitor.visit(this.rvalue);\n }\n\n eval(context) {\n const result = ((op, a, b) => {\n switch (op) {\n case 'and': return a && b;\n case 'or': return a || b;\n default:\n switch (Node.compare(a, b)) {\n case -1:\n return op === '<' || op === '=<' || op === '<=';\n case 0:\n return op === '=' || op === '>=' || op === '=<' || op === '<=';\n case 1:\n return op === '>' || op === '>=';\n default:\n return false;\n }\n }\n })(this.op, this.lvalue.eval(context), this.rvalue.eval(context));\n\n return this.negate ? !result : result;\n }\n}\n\nCondition.prototype.type = 'Condition';\nexport default Condition;\n","import Node from './node';\n\nclass UnicodeDescriptor extends Node {\n constructor(value) {\n this.value = value;\n }\n}\n\nUnicodeDescriptor.prototype.type = 'UnicodeDescriptor';\n\nexport default UnicodeDescriptor;\n","import Node from './node';\nimport Operation from './operation';\nimport Dimension from './dimension';\n\nclass Negative extends Node {\n constructor(node) {\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('-');\n this.value.genCSS(context, output);\n }\n\n eval(context) {\n if (context.isMathOn()) {\n return (new Operation('*', [new Dimension(-1), this.value])).eval(context);\n }\n return new Negative(this.value.eval(context));\n }\n}\n\nNegative.prototype.type = 'Negative';\nexport default Negative;\n","import Node from './node';\nimport Selector from './selector';\n\nclass Extend extends Node {\n constructor(selector, option, index, currentFileInfo, visibilityInfo) {\n this.selector = selector;\n this.option = option;\n this.object_id = Extend.next_id++;\n this.parent_ids = [this.object_id];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n switch (option) {\n case 'all':\n this.allowBefore = true;\n this.allowAfter = true;\n break;\n default:\n this.allowBefore = false;\n this.allowAfter = false;\n break;\n }\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n this.selector = visitor.visit(this.selector);\n }\n\n eval(context) {\n return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n clone(context) {\n return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n // it concatenates (joins) all selectors in selector array\n findSelfSelectors(selectors) {\n let selfElements = [];\n let i;\n let selectorElements;\n\n for (i = 0; i < selectors.length; i++) {\n selectorElements = selectors[i].elements;\n // duplicate the logic in genCSS function inside the selector node.\n // future TODO - move both logics into the selector joiner visitor\n if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') {\n selectorElements[0].combinator.value = ' ';\n }\n selfElements = selfElements.concat(selectors[i].elements);\n }\n\n this.selfSelectors = [new Selector(selfElements)];\n this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo());\n }\n}\n\nExtend.next_id = 0;\n\nExtend.prototype.type = 'Extend';\nexport default Extend;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport DetachedRuleset from './detached-ruleset';\nimport LessError from '../less-error';\n\nclass VariableCall extends Node {\n constructor(variable, index, currentFileInfo) {\n this.variable = variable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n eval(context) {\n let rules;\n let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context);\n const error = new LessError({message: `Could not evaluate variable call ${this.variable}`});\n\n if (!detachedRuleset.ruleset) {\n if (detachedRuleset.rules) {\n rules = detachedRuleset;\n }\n else if (Array.isArray(detachedRuleset)) {\n rules = new Ruleset('', detachedRuleset);\n }\n else if (Array.isArray(detachedRuleset.value)) {\n rules = new Ruleset('', detachedRuleset.value);\n }\n else {\n throw error;\n }\n detachedRuleset = new DetachedRuleset(rules);\n }\n if (detachedRuleset.ruleset) {\n return detachedRuleset.callEval(context);\n }\n throw error;\n }\n}\n\nVariableCall.prototype.type = 'VariableCall';\nexport default VariableCall;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport Selector from './selector';\n\nclass NamespaceValue extends Node {\n constructor(ruleCall, lookups, important, index, fileInfo) {\n this.value = ruleCall;\n this.lookups = lookups;\n this.important = important;\n this._index = index;\n this._fileInfo = fileInfo;\n }\n\n eval(context) {\n let i;\n let j;\n let name;\n let rules = this.value.eval(context);\n\n for (i = 0; i < this.lookups.length; i++) {\n name = this.lookups[i];\n\n /**\n * Eval'd DRs return rulesets.\n * Eval'd mixins return rules, so let's make a ruleset if we need it.\n * We need to do this because of late parsing of values\n */\n if (Array.isArray(rules)) {\n rules = new Ruleset([new Selector()], rules);\n }\n\n if (name === '') {\n rules = rules.lastDeclaration();\n }\n else if (name.charAt(0) === '@') {\n if (name.charAt(1) === '@') {\n name = `@${new Variable(name.substr(1)).eval(context).value}`;\n }\n if (rules.variables) {\n rules = rules.variable(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `variable ${name} not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n else {\n if (name.substring(0, 2) === '$@') {\n name = `$${new Variable(name.substr(1)).eval(context).value}`;\n }\n else {\n name = name.charAt(0) === '$' ? name : `$${name}`;\n }\n if (rules.properties) {\n rules = rules.property(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `property \"${name.substr(1)}\" not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n // Properties are an array of values, since a ruleset can have multiple props.\n // We pick the last one (the \"cascaded\" value)\n rules = rules[rules.length - 1];\n }\n\n if (rules.value) {\n rules = rules.eval(context).value;\n }\n if (rules.ruleset) {\n rules = rules.ruleset.eval(context);\n }\n }\n return rules;\n }\n}\n\nNamespaceValue.prototype.type = 'NamespaceValue';\nexport default NamespaceValue;\n","import Selector from './selector';\nimport Element from './element';\nimport Ruleset from './ruleset';\nimport Declaration from './declaration';\nimport DetachedRuleset from './detached-ruleset';\nimport Expression from './expression';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass Definition extends Ruleset {\n constructor(name, params, rules, condition, variadic, frames, visibilityInfo) {\n this.name = name || 'anonymous mixin';\n this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])];\n this.params = params;\n this.condition = condition;\n this.variadic = variadic;\n this.arity = params.length;\n this.rules = rules;\n this._lookups = {};\n const optionalParameters = [];\n this.required = params.reduce((count, p) => {\n if (!p.name || (p.name && !p.value)) {\n return count + 1;\n }\n else {\n optionalParameters.push(p.name);\n return count;\n }\n }, 0);\n this.optionalParameters = optionalParameters;\n this.frames = frames;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n if (this.params && this.params.length) {\n this.params = visitor.visitArray(this.params);\n }\n this.rules = visitor.visitArray(this.rules);\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n evalParams(context, mixinEnv, args, evaldArguments) {\n /* jshint boss:true */\n const frame = new Ruleset(null, null);\n\n let varargs;\n let arg;\n const params = utils.copyArray(this.params);\n let i;\n let j;\n let val;\n let name;\n let isNamedFound;\n let argIndex;\n let argsLength = 0;\n\n if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) {\n frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit();\n }\n mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames));\n\n if (args) {\n args = utils.copyArray(args);\n argsLength = args.length;\n\n for (i = 0; i < argsLength; i++) {\n arg = args[i];\n if (name = (arg && arg.name)) {\n isNamedFound = false;\n for (j = 0; j < params.length; j++) {\n if (!evaldArguments[j] && name === params[j].name) {\n evaldArguments[j] = arg.value.eval(context);\n frame.prependRule(new Declaration(name, arg.value.eval(context)));\n isNamedFound = true;\n break;\n }\n }\n if (isNamedFound) {\n args.splice(i, 1);\n i--;\n continue;\n } else {\n throw { type: 'Runtime', message: `Named argument for ${this.name} ${args[i].name} not found` };\n }\n }\n }\n }\n argIndex = 0;\n for (i = 0; i < params.length; i++) {\n if (evaldArguments[i]) { continue; }\n\n arg = args && args[argIndex];\n\n if (name = params[i].name) {\n if (params[i].variadic) {\n varargs = [];\n for (j = argIndex; j < argsLength; j++) {\n varargs.push(args[j].value.eval(context));\n }\n frame.prependRule(new Declaration(name, new Expression(varargs).eval(context)));\n } else {\n val = arg && arg.value;\n if (val) {\n // This was a mixin call, pass in a detached ruleset of it's eval'd rules\n if (Array.isArray(val)) {\n val = new DetachedRuleset(new Ruleset('', val));\n }\n else {\n val = val.eval(context);\n }\n } else if (params[i].value) {\n val = params[i].value.eval(mixinEnv);\n frame.resetCache();\n } else {\n throw { type: 'Runtime', message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` };\n }\n\n frame.prependRule(new Declaration(name, val));\n evaldArguments[i] = val;\n }\n }\n\n if (params[i].variadic && args) {\n for (j = argIndex; j < argsLength; j++) {\n evaldArguments[j] = args[j].value.eval(context);\n }\n }\n argIndex++;\n }\n\n return frame;\n }\n\n makeImportant() {\n const rules = !this.rules ? this.rules : this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant(true);\n } else {\n return r;\n }\n });\n const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames);\n return result;\n }\n\n eval(context) {\n return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames));\n }\n\n evalCall(context, args, important) {\n const _arguments = [];\n const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames;\n const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments);\n let rules;\n let ruleset;\n\n frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context)));\n\n rules = utils.copyArray(this.rules);\n\n ruleset = new Ruleset(null, rules);\n ruleset.originalRuleset = this;\n ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames)));\n if (important) {\n ruleset = ruleset.makeImportant();\n }\n return ruleset;\n }\n\n matchCondition(args, context) {\n if (this.condition && !this.condition.eval(\n new contexts.Eval(context,\n [this.evalParams(context, /* the parameter variables */\n new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])]\n .concat(this.frames || []) // the parent namespace/mixin frames\n .concat(context.frames)))) { // the current environment frames\n return false;\n }\n return true;\n }\n\n matchArgs(args, context) {\n const allArgsCnt = (args && args.length) || 0;\n let len;\n const optionalParameters = this.optionalParameters;\n const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => {\n if (optionalParameters.indexOf(p.name) < 0) {\n return count + 1;\n } else {\n return count;\n }\n }, 0);\n\n if (!this.variadic) {\n if (requiredArgsCnt < this.required) {\n return false;\n }\n if (allArgsCnt > this.params.length) {\n return false;\n }\n } else {\n if (requiredArgsCnt < (this.required - 1)) {\n return false;\n }\n }\n\n // check patterns\n len = Math.min(requiredArgsCnt, this.arity);\n\n for (let i = 0; i < len; i++) {\n if (!this.params[i].name && !this.params[i].variadic) {\n if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) {\n return false;\n }\n }\n }\n return true;\n }\n}\n\nDefinition.prototype.type = 'MixinDefinition';\nDefinition.prototype.evalFirst = true;\nexport default Definition;\n","import Node from './node';\nimport Selector from './selector';\nimport MixinDefinition from './mixin-definition';\nimport defaultFunc from '../functions/default';\n\nclass MixinCall extends Node {\n constructor(elements, args, index, currentFileInfo, important) {\n this.selector = new Selector(elements);\n this.arguments = args || [];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.important = important;\n this.allowRoot = true;\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n if (this.selector) {\n this.selector = visitor.visit(this.selector);\n }\n if (this.arguments.length) {\n this.arguments = visitor.visitArray(this.arguments);\n }\n }\n\n eval(context) {\n let mixins;\n let mixin;\n let mixinPath;\n const args = [];\n let arg;\n let argValue;\n const rules = [];\n let match = false;\n let i;\n let m;\n let f;\n let isRecursive;\n let isOneFound;\n const candidates = [];\n let candidate;\n const conditionResult = [];\n let defaultResult;\n const defFalseEitherCase = -1;\n const defNone = 0;\n const defTrue = 1;\n const defFalse = 2;\n let count;\n let originalRuleset;\n let noArgumentsFilter;\n\n this.selector = this.selector.eval(context);\n\n function calcDefGroup(mixin, mixinPath) {\n let f;\n let p;\n let namespace;\n\n for (f = 0; f < 2; f++) {\n conditionResult[f] = true;\n defaultFunc.value(f);\n for (p = 0; p < mixinPath.length && conditionResult[f]; p++) {\n namespace = mixinPath[p];\n if (namespace.matchCondition) {\n conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context);\n }\n }\n if (mixin.matchCondition) {\n conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context);\n }\n }\n if (conditionResult[0] || conditionResult[1]) {\n if (conditionResult[0] != conditionResult[1]) {\n return conditionResult[1] ?\n defTrue : defFalse;\n }\n\n return defNone;\n }\n return defFalseEitherCase;\n }\n\n for (i = 0; i < this.arguments.length; i++) {\n arg = this.arguments[i];\n argValue = arg.value.eval(context);\n if (arg.expand && Array.isArray(argValue.value)) {\n argValue = argValue.value;\n for (m = 0; m < argValue.length; m++) {\n args.push({value: argValue[m]});\n }\n } else {\n args.push({name: arg.name, value: argValue});\n }\n }\n\n noArgumentsFilter = rule => rule.matchArgs(null, context);\n\n for (i = 0; i < context.frames.length; i++) {\n if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) {\n isOneFound = true;\n\n // To make `default()` function independent of definition order we have two \"subpasses\" here.\n // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`),\n // and build candidate list with corresponding flags. Then, when we know all possible matches,\n // we make a final decision.\n\n for (m = 0; m < mixins.length; m++) {\n mixin = mixins[m].rule;\n mixinPath = mixins[m].path;\n isRecursive = false;\n for (f = 0; f < context.frames.length; f++) {\n if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) {\n isRecursive = true;\n break;\n }\n }\n if (isRecursive) {\n continue;\n }\n\n if (mixin.matchArgs(args, context)) {\n candidate = {mixin, group: calcDefGroup(mixin, mixinPath)};\n\n if (candidate.group !== defFalseEitherCase) {\n candidates.push(candidate);\n }\n\n match = true;\n }\n }\n\n defaultFunc.reset();\n\n count = [0, 0, 0];\n for (m = 0; m < candidates.length; m++) {\n count[candidates[m].group]++;\n }\n\n if (count[defNone] > 0) {\n defaultResult = defFalse;\n } else {\n defaultResult = defTrue;\n if ((count[defTrue] + count[defFalse]) > 1) {\n throw { type: 'Runtime',\n message: `Ambiguous use of \\`default()\\` found when matching for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n for (m = 0; m < candidates.length; m++) {\n candidate = candidates[m].group;\n if ((candidate === defNone) || (candidate === defaultResult)) {\n try {\n mixin = candidates[m].mixin;\n if (!(mixin instanceof MixinDefinition)) {\n originalRuleset = mixin.originalRuleset || mixin;\n mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo());\n mixin.originalRuleset = originalRuleset;\n }\n const newRules = mixin.evalCall(context, args, this.important).rules;\n this._setVisibilityToReplacement(newRules);\n Array.prototype.push.apply(rules, newRules);\n } catch (e) {\n throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack };\n }\n }\n }\n\n if (match) {\n return rules;\n }\n }\n }\n if (isOneFound) {\n throw { type: 'Runtime',\n message: `No matching definition was found for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n } else {\n throw { type: 'Name',\n message: `${this.selector.toCSS().trim()} is undefined`,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n _setVisibilityToReplacement(replacement) {\n let i;\n let rule;\n if (this.blocksVisibility()) {\n for (i = 0; i < replacement.length; i++) {\n rule = replacement[i];\n rule.addVisibilityBlock();\n }\n }\n }\n\n format(args) {\n return `${this.selector.toCSS().trim()}(${args ? args.map(a => {\n let argValue = '';\n if (a.name) {\n argValue += `${a.name}:`;\n }\n if (a.value.toCSS) {\n argValue += a.value.toCSS();\n } else {\n argValue += '???';\n }\n return argValue;\n }).join(', ') : ''})`;\n }\n}\n\nMixinCall.prototype.type = 'MixinCall';\nexport default MixinCall;\n","const tree = Object.create(null);\n\nimport Node from './node';\nimport Color from './color';\nimport AtRule from './atrule';\nimport DetachedRuleset from './detached-ruleset';\nimport Operation from './operation';\nimport Dimension from './dimension';\nimport Unit from './unit';\nimport Keyword from './keyword';\nimport Variable from './variable';\nimport Property from './property';\nimport Ruleset from './ruleset';\nimport Element from './element';\nimport Attribute from './attribute';\nimport Combinator from './combinator';\nimport Selector from './selector';\nimport Quoted from './quoted';\nimport Expression from './expression';\nimport Declaration from './declaration';\nimport Call from './call';\nimport URL from './url';\nimport Import from './import';\nimport Comment from './comment';\nimport Anonymous from './anonymous';\nimport Value from './value';\nimport JavaScript from './javascript';\nimport Assignment from './assignment';\nimport Condition from './condition';\nimport Paren from './paren';\nimport Media from './media';\nimport UnicodeDescriptor from './unicode-descriptor';\nimport Negative from './negative';\nimport Extend from './extend';\nimport VariableCall from './variable-call';\nimport NamespaceValue from './namespace-value';\n\n// mixins\nimport MixinCall from './mixin-call';\nimport MixinDefinition from './mixin-definition';\n\nexport default {\n Node, Color, AtRule, DetachedRuleset, Operation,\n Dimension, Unit, Keyword, Variable, Property,\n Ruleset, Element, Attribute, Combinator, Selector,\n Quoted, Expression, Declaration, Call, URL, Import,\n Comment, Anonymous, Value, JavaScript, Assignment,\n Condition, Paren, Media, UnicodeDescriptor, Negative,\n Extend, VariableCall, NamespaceValue,\n mixin: {\n Call: MixinCall,\n Definition: MixinDefinition\n }\n};","export default {\n error: function(msg) {\n this._fireEvent('error', msg);\n },\n warn: function(msg) {\n this._fireEvent('warn', msg);\n },\n info: function(msg) {\n this._fireEvent('info', msg);\n },\n debug: function(msg) {\n this._fireEvent('debug', msg);\n },\n addListener: function(listener) {\n this._listeners.push(listener);\n },\n removeListener: function(listener) {\n for (let i = 0; i < this._listeners.length; i++) {\n if (this._listeners[i] === listener) {\n this._listeners.splice(i, 1);\n return;\n }\n }\n },\n _fireEvent: function(type, msg) {\n for (let i = 0; i < this._listeners.length; i++) {\n const logFunction = this._listeners[i][type];\n if (logFunction) {\n logFunction(msg);\n }\n }\n },\n _listeners: []\n};\n","/**\n * @todo Document why this abstraction exists, and the relationship between\n * environment, file managers, and plugin manager\n */\n\nimport logger from '../logger';\n\nclass environment {\n constructor(externalEnvironment, fileManagers) {\n this.fileManagers = fileManagers || [];\n externalEnvironment = externalEnvironment || {};\n\n const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator'];\n const requiredFunctions = [];\n const functions = requiredFunctions.concat(optionalFunctions);\n\n for (let i = 0; i < functions.length; i++) {\n const propName = functions[i];\n const environmentFunc = externalEnvironment[propName];\n if (environmentFunc) {\n this[propName] = environmentFunc.bind(externalEnvironment);\n } else if (i < requiredFunctions.length) {\n this.warn(`missing required function in environment - ${propName}`);\n }\n }\n }\n\n getFileManager(filename, currentDirectory, options, environment, isSync) {\n\n if (!filename) {\n logger.warn('getFileManager called with no filename.. Please report this issue. continuing.');\n }\n if (currentDirectory == null) {\n logger.warn('getFileManager called with null directory.. Please report this issue. continuing.');\n }\n\n let fileManagers = this.fileManagers;\n if (options.pluginManager) {\n fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers());\n }\n for (let i = fileManagers.length - 1; i >= 0 ; i--) {\n const fileManager = fileManagers[i];\n if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) {\n return fileManager;\n }\n }\n return null;\n }\n\n addFileManager(fileManager) {\n this.fileManagers.push(fileManager);\n }\n\n clearFileManagers() {\n this.fileManagers = [];\n }\n}\n\nexport default environment;\n","const abstractFileManager = () => {\n};\n\nabstractFileManager.prototype.getPath = filename => {\n let j = filename.lastIndexOf('?');\n if (j > 0) {\n filename = filename.slice(0, j);\n }\n j = filename.lastIndexOf('/');\n if (j < 0) {\n j = filename.lastIndexOf('\\\\');\n }\n if (j < 0) {\n return '';\n }\n return filename.slice(0, j + 1);\n};\n\nabstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\\.[a-z]*$)|([\\?;].*)$/.test(path) ? path : path + ext;\n\nabstractFileManager.prototype.tryAppendLessExtension = function(path) {\n return this.tryAppendExtension(path, '.less');\n};\n\nabstractFileManager.prototype.supportsSync = () => false;\n\nabstractFileManager.prototype.alwaysMakePathsAbsolute = () => false;\n\nabstractFileManager.prototype.isPathAbsolute = filename => (/^(?:[a-z-]+:|\\/|\\\\|#)/i).test(filename);\n// TODO: pull out / replace?\nabstractFileManager.prototype.join = (basePath, laterPath) => {\n if (!basePath) {\n return laterPath;\n }\n return basePath + laterPath;\n};\n\nabstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) {\n // diff between two paths to create a relative path\n\n const urlParts = this.extractUrlParts(url);\n\n const baseUrlParts = this.extractUrlParts(baseUrl);\n let i;\n let max;\n let urlDirectories;\n let baseUrlDirectories;\n let diff = '';\n if (urlParts.hostPart !== baseUrlParts.hostPart) {\n return '';\n }\n max = Math.max(baseUrlParts.directories.length, urlParts.directories.length);\n for (i = 0; i < max; i++) {\n if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; }\n }\n baseUrlDirectories = baseUrlParts.directories.slice(i);\n urlDirectories = urlParts.directories.slice(i);\n for (i = 0; i < baseUrlDirectories.length - 1; i++) {\n diff += '../';\n }\n for (i = 0; i < urlDirectories.length - 1; i++) {\n diff += `${urlDirectories[i]}/`;\n }\n return diff;\n};\n// helper function, not part of API\nabstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) {\n // urlParts[1] = protocol://hostname/ OR /\n // urlParts[2] = / if path relative to host base\n // urlParts[3] = directories\n // urlParts[4] = filename\n // urlParts[5] = parameters\n\n const urlPartsRegex = /^((?:[a-z-]+:)?\\/{2}(?:[^\\/\\?#]*\\/)|([\\/\\\\]))?((?:[^\\/\\\\\\?#]*[\\/\\\\])*)([^\\/\\\\\\?#]*)([#\\?].*)?$/i;\n\n const urlParts = url.match(urlPartsRegex);\n const returner = {};\n let rawDirectories = [];\n const directories = [];\n let i;\n let baseUrlParts;\n\n if (!urlParts) {\n throw new Error(`Could not parse sheet href - '${url}'`);\n }\n\n // Stylesheets in IE don't always return the full path\n if (baseUrl && (!urlParts[1] || urlParts[2])) {\n baseUrlParts = baseUrl.match(urlPartsRegex);\n if (!baseUrlParts) {\n throw new Error(`Could not parse page url - '${baseUrl}'`);\n }\n urlParts[1] = urlParts[1] || baseUrlParts[1] || '';\n if (!urlParts[2]) {\n urlParts[3] = baseUrlParts[3] + urlParts[3];\n }\n }\n\n if (urlParts[3]) {\n rawDirectories = urlParts[3].replace(/\\\\/g, '/').split('/');\n\n // collapse '..' and skip '.'\n for (i = 0; i < rawDirectories.length; i++) {\n\n if (rawDirectories[i] === '..') {\n directories.pop();\n }\n else if (rawDirectories[i] !== '.') {\n directories.push(rawDirectories[i]);\n }\n \n }\n }\n\n returner.hostPart = urlParts[1];\n returner.directories = directories;\n returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/');\n returner.path = (urlParts[1] || '') + directories.join('/');\n returner.filename = urlParts[4];\n returner.fileUrl = returner.path + (urlParts[4] || '');\n returner.url = returner.fileUrl + (urlParts[5] || '');\n return returner;\n};\n\nexport default abstractFileManager;\n","import functionRegistry from '../functions/function-registry';\nimport LessError from '../less-error';\n\nclass AbstractPluginLoader {\n constructor() {\n // Implemented by Node.js plugin loader\n this.require = () => null\n }\n\n evalPlugin(contents, context, imports, pluginOptions, fileInfo) {\n let loader;\n let registry;\n let pluginObj;\n let localModule;\n let pluginManager;\n let filename;\n let result;\n\n pluginManager = context.pluginManager;\n\n if (fileInfo) {\n if (typeof fileInfo === 'string') {\n filename = fileInfo;\n }\n else {\n filename = fileInfo.filename;\n }\n }\n const shortname = (new this.less.FileManager()).extractUrlParts(filename).filename;\n\n if (filename) {\n pluginObj = pluginManager.get(filename);\n\n if (pluginObj) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n return pluginObj;\n }\n }\n localModule = {\n exports: {},\n pluginManager,\n fileInfo\n };\n registry = functionRegistry.create();\n\n const registerPlugin = obj => {\n pluginObj = obj;\n };\n\n try {\n loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents);\n loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo);\n }\n catch (e) {\n return new LessError(e, imports, filename);\n }\n\n if (!pluginObj) {\n pluginObj = localModule.exports;\n }\n pluginObj = this.validatePlugin(pluginObj, filename, shortname);\n\n if (pluginObj instanceof LessError) {\n return pluginObj;\n }\n\n if (pluginObj) {\n pluginObj.imports = imports;\n pluginObj.filename = filename;\n\n // For < 3.x (or unspecified minVersion) - setOptions() before install()\n if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n\n if (result) {\n return result;\n }\n }\n\n // Run on first load\n pluginManager.addPlugin(pluginObj, fileInfo.filename, registry);\n pluginObj.functions = registry.getLocalFunctions();\n\n // Need to call setOptions again because the pluginObj might have functions\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n\n // Run every @plugin call\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n\n }\n else {\n return new LessError({ message: 'Not a valid plugin' }, imports, filename);\n }\n\n return pluginObj;\n }\n\n trySetOptions(plugin, filename, name, options) {\n if (options && !plugin.setOptions) {\n return new LessError({\n message: `Options have been provided but the plugin ${name} does not support any options.`\n });\n }\n try {\n plugin.setOptions && plugin.setOptions(options);\n }\n catch (e) {\n return new LessError(e);\n }\n }\n\n validatePlugin(plugin, filename, name) {\n if (plugin) {\n // support plugins being a function\n // so that the plugin can be more usable programmatically\n if (typeof plugin === 'function') {\n plugin = new plugin();\n }\n\n if (plugin.minVersion) {\n if (this.compareVersion(plugin.minVersion, this.less.version) < 0) {\n return new LessError({\n message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}`\n });\n }\n }\n return plugin;\n }\n return null;\n }\n\n compareVersion(aVersion, bVersion) {\n if (typeof aVersion === 'string') {\n aVersion = aVersion.match(/^(\\d+)\\.?(\\d+)?\\.?(\\d+)?/);\n aVersion.shift();\n }\n for (let i = 0; i < aVersion.length; i++) {\n if (aVersion[i] !== bVersion[i]) {\n return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1;\n }\n }\n return 0;\n }\n\n versionToString(version) {\n let versionString = '';\n for (let i = 0; i < version.length; i++) {\n versionString += (versionString ? '.' : '') + version[i];\n }\n return versionString;\n }\n\n printUsage(plugins) {\n for (let i = 0; i < plugins.length; i++) {\n const plugin = plugins[i];\n if (plugin.printUsage) {\n plugin.printUsage();\n }\n }\n }\n}\n\nexport default AbstractPluginLoader;\n\n","import tree from '../tree';\nconst _visitArgs = { visitDeeper: true };\nlet _hasIndexed = false;\n\nfunction _noop(node) {\n return node;\n}\n\nfunction indexNodeTypes(parent, ticker) {\n // add .typeIndex to tree node types for lookup table\n let key;\n\n let child;\n for (key in parent) { \n /* eslint guard-for-in: 0 */\n child = parent[key];\n switch (typeof child) {\n case 'function':\n // ignore bound functions directly on tree which do not have a prototype\n // or aren't nodes\n if (child.prototype && child.prototype.type) {\n child.prototype.typeIndex = ticker++;\n }\n break;\n case 'object':\n ticker = indexNodeTypes(child, ticker);\n break;\n \n }\n }\n return ticker;\n}\n\nclass Visitor {\n constructor(implementation) {\n this._implementation = implementation;\n this._visitInCache = {};\n this._visitOutCache = {};\n\n if (!_hasIndexed) {\n indexNodeTypes(tree, 1);\n _hasIndexed = true;\n }\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n\n const nodeTypeIndex = node.typeIndex;\n if (!nodeTypeIndex) {\n // MixinCall args aren't a node type?\n if (node.value && node.value.typeIndex) {\n this.visit(node.value);\n }\n return node;\n }\n\n const impl = this._implementation;\n let func = this._visitInCache[nodeTypeIndex];\n let funcOut = this._visitOutCache[nodeTypeIndex];\n const visitArgs = _visitArgs;\n let fnName;\n\n visitArgs.visitDeeper = true;\n\n if (!func) {\n fnName = `visit${node.type}`;\n func = impl[fnName] || _noop;\n funcOut = impl[`${fnName}Out`] || _noop;\n this._visitInCache[nodeTypeIndex] = func;\n this._visitOutCache[nodeTypeIndex] = funcOut;\n }\n\n if (func !== _noop) {\n const newNode = func.call(impl, node, visitArgs);\n if (node && impl.isReplacing) {\n node = newNode;\n }\n }\n\n if (visitArgs.visitDeeper && node && node.accept) {\n node.accept(this);\n }\n\n if (funcOut != _noop) {\n funcOut.call(impl, node);\n }\n\n return node;\n }\n\n visitArray(nodes, nonReplacing) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n\n // Non-replacing\n if (nonReplacing || !this._implementation.isReplacing) {\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n // Replacing\n const out = [];\n for (i = 0; i < cnt; i++) {\n const evald = this.visit(nodes[i]);\n if (evald === undefined) { continue; }\n if (!evald.splice) {\n out.push(evald);\n } else if (evald.length) {\n this.flatten(evald, out);\n }\n }\n return out;\n }\n\n flatten(arr, out) {\n if (!out) {\n out = [];\n }\n\n let cnt;\n let i;\n let item;\n let nestedCnt;\n let j;\n let nestedItem;\n\n for (i = 0, cnt = arr.length; i < cnt; i++) {\n item = arr[i];\n if (item === undefined) {\n continue;\n }\n if (!item.splice) {\n out.push(item);\n continue;\n }\n\n for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) {\n nestedItem = item[j];\n if (nestedItem === undefined) {\n continue;\n }\n if (!nestedItem.splice) {\n out.push(nestedItem);\n } else if (nestedItem.length) {\n this.flatten(nestedItem, out);\n }\n }\n }\n\n return out;\n }\n}\n\nexport default Visitor;\n","class ImportSequencer {\n constructor(onSequencerEmpty) {\n this.imports = [];\n this.variableImports = [];\n this._onSequencerEmpty = onSequencerEmpty;\n this._currentDepth = 0;\n }\n\n addImport(callback) {\n const importSequencer = this;\n\n const importItem = {\n callback,\n args: null,\n isReady: false\n };\n\n this.imports.push(importItem);\n return function(...args) {\n importItem.args = Array.prototype.slice.call(args, 0);\n importItem.isReady = true;\n importSequencer.tryRun();\n };\n }\n\n addVariableImport(callback) {\n this.variableImports.push(callback);\n }\n\n tryRun() {\n this._currentDepth++;\n try {\n while (true) {\n while (this.imports.length > 0) {\n const importItem = this.imports[0];\n if (!importItem.isReady) {\n return;\n }\n this.imports = this.imports.slice(1);\n importItem.callback.apply(null, importItem.args);\n }\n if (this.variableImports.length === 0) {\n break;\n }\n const variableImport = this.variableImports[0];\n this.variableImports = this.variableImports.slice(1);\n variableImport();\n }\n } finally {\n this._currentDepth--;\n }\n if (this._currentDepth === 0 && this._onSequencerEmpty) {\n this._onSequencerEmpty();\n }\n }\n}\n\nexport default ImportSequencer;\n","import contexts from '../contexts';\nimport Visitor from './visitor';\nimport ImportSequencer from './import-sequencer';\nimport * as utils from '../utils';\n\nconst ImportVisitor = function(importer, finish) {\n\n this._visitor = new Visitor(this);\n this._importer = importer;\n this._finish = finish;\n this.context = new contexts.Eval();\n this.importCount = 0;\n this.onceFileDetectionMap = {};\n this.recursionDetector = {};\n this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this));\n};\n\nImportVisitor.prototype = {\n isReplacing: false,\n run: function (root) {\n try {\n // process the contents\n this._visitor.visit(root);\n }\n catch (e) {\n this.error = e;\n }\n\n this.isFinished = true;\n this._sequencer.tryRun();\n },\n _onSequencerEmpty: function() {\n if (!this.isFinished) {\n return;\n }\n this._finish(this.error);\n },\n visitImport: function (importNode, visitArgs) {\n const inlineCSS = importNode.options.inline;\n\n if (!importNode.css || inlineCSS) {\n\n const context = new contexts.Eval(this.context, utils.copyArray(this.context.frames));\n const importParent = context.frames[0];\n\n this.importCount++;\n if (importNode.isVariableImport()) {\n this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent));\n } else {\n this.processImportNode(importNode, context, importParent);\n }\n }\n visitArgs.visitDeeper = false;\n },\n processImportNode: function(importNode, context, importParent) {\n let evaldImportNode;\n const inlineCSS = importNode.options.inline;\n\n try {\n evaldImportNode = importNode.evalForImport(context);\n } catch (e) {\n if (!e.filename) { e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename; }\n // attempt to eval properly and treat as css\n importNode.css = true;\n // if that fails, this error will be thrown\n importNode.error = e;\n }\n\n if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) {\n if (evaldImportNode.options.multiple) {\n context.importMultiple = true;\n }\n\n // try appending if we haven't determined if it is css or not\n const tryAppendLessExtension = evaldImportNode.css === undefined;\n\n for (let i = 0; i < importParent.rules.length; i++) {\n if (importParent.rules[i] === importNode) {\n importParent.rules[i] = evaldImportNode;\n break;\n }\n }\n\n const onImported = this.onImported.bind(this, evaldImportNode, context);\n const sequencedOnImported = this._sequencer.addImport(onImported);\n\n this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(),\n evaldImportNode.options, sequencedOnImported);\n } else {\n this.importCount--;\n if (this.isFinished) {\n this._sequencer.tryRun();\n }\n }\n },\n onImported: function (importNode, context, e, root, importedAtRoot, fullPath) {\n if (e) {\n if (!e.filename) {\n e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename;\n }\n this.error = e;\n }\n\n const importVisitor = this;\n const inlineCSS = importNode.options.inline;\n const isPlugin = importNode.options.isPlugin;\n const isOptional = importNode.options.optional;\n const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector;\n\n if (!context.importMultiple) {\n if (duplicateImport) {\n importNode.skip = true;\n } else {\n importNode.skip = () => {\n if (fullPath in importVisitor.onceFileDetectionMap) {\n return true;\n }\n importVisitor.onceFileDetectionMap[fullPath] = true;\n return false;\n };\n }\n }\n\n if (!fullPath && isOptional) {\n importNode.skip = true;\n }\n\n if (root) {\n importNode.root = root;\n importNode.importedFilename = fullPath;\n\n if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) {\n importVisitor.recursionDetector[fullPath] = true;\n\n const oldContext = this.context;\n this.context = context;\n try {\n this._visitor.visit(root);\n } catch (e) {\n this.error = e;\n }\n this.context = oldContext;\n }\n }\n\n importVisitor.importCount--;\n\n if (importVisitor.isFinished) {\n importVisitor._sequencer.tryRun();\n }\n },\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.unshift(declNode);\n } else {\n visitArgs.visitDeeper = false;\n }\n },\n visitDeclarationOut: function(declNode) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.shift();\n }\n },\n visitAtRule: function (atRuleNode, visitArgs) {\n this.context.frames.unshift(atRuleNode);\n },\n visitAtRuleOut: function (atRuleNode) {\n this.context.frames.shift();\n },\n visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {\n this.context.frames.unshift(mixinDefinitionNode);\n },\n visitMixinDefinitionOut: function (mixinDefinitionNode) {\n this.context.frames.shift();\n },\n visitRuleset: function (rulesetNode, visitArgs) {\n this.context.frames.unshift(rulesetNode);\n },\n visitRulesetOut: function (rulesetNode) {\n this.context.frames.shift();\n },\n visitMedia: function (mediaNode, visitArgs) {\n this.context.frames.unshift(mediaNode.rules[0]);\n },\n visitMediaOut: function (mediaNode) {\n this.context.frames.shift();\n }\n};\nexport default ImportVisitor;\n","class SetTreeVisibilityVisitor {\n constructor(visible) {\n this.visible = visible;\n }\n\n run(root) {\n this.visit(root);\n }\n\n visitArray(nodes) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n if (node.constructor === Array) {\n return this.visitArray(node);\n }\n\n if (!node.blocksVisibility || node.blocksVisibility()) {\n return node;\n }\n if (this.visible) {\n node.ensureVisibility();\n } else {\n node.ensureInvisibility();\n }\n\n node.accept(this);\n return node;\n }\n}\n\nexport default SetTreeVisibilityVisitor;","import tree from '../tree';\nimport Visitor from './visitor';\nimport logger from '../logger';\nimport * as utils from '../utils';\n\n/* jshint loopfunc:true */\n\nclass ExtendFinderVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n this.contexts = [];\n this.allExtendsStack = [[]];\n }\n\n run(root) {\n root = this._visitor.visit(root);\n root.allExtends = this.allExtendsStack[0];\n return root;\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n\n let i;\n let j;\n let extend;\n const allSelectorsExtendList = [];\n let extendList;\n\n // get &:extend(.a); rules which apply to all selectors in this ruleset\n const rules = rulesetNode.rules;\n\n const ruleCnt = rules ? rules.length : 0;\n for (i = 0; i < ruleCnt; i++) {\n if (rulesetNode.rules[i] instanceof tree.Extend) {\n allSelectorsExtendList.push(rules[i]);\n rulesetNode.extendOnEveryPath = true;\n }\n }\n\n // now find every selector and apply the extends that apply to all extends\n // and the ones which apply to an individual extend\n const paths = rulesetNode.paths;\n for (i = 0; i < paths.length; i++) {\n const selectorPath = paths[i];\n const selector = selectorPath[selectorPath.length - 1];\n const selExtendList = selector.extendList;\n\n extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList)\n : allSelectorsExtendList;\n\n if (extendList) {\n extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone());\n }\n\n for (j = 0; j < extendList.length; j++) {\n this.foundExtends = true;\n extend = extendList[j];\n extend.findSelfSelectors(selectorPath);\n extend.ruleset = rulesetNode;\n if (j === 0) { extend.firstExtendOnThisSelectorPath = true; }\n this.allExtendsStack[this.allExtendsStack.length - 1].push(extend);\n }\n }\n\n this.contexts.push(rulesetNode.selectors);\n }\n\n visitRulesetOut(rulesetNode) {\n if (!rulesetNode.root) {\n this.contexts.length = this.contexts.length - 1;\n }\n }\n\n visitMedia(mediaNode, visitArgs) {\n mediaNode.allExtends = [];\n this.allExtendsStack.push(mediaNode.allExtends);\n }\n\n visitMediaOut(mediaNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n atRuleNode.allExtends = [];\n this.allExtendsStack.push(atRuleNode.allExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n}\n\nclass ProcessExtendsVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n const extendFinder = new ExtendFinderVisitor();\n this.extendIndices = {};\n extendFinder.run(root);\n if (!extendFinder.foundExtends) { return root; }\n root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends));\n this.allExtendsStack = [root.allExtends];\n const newRoot = this._visitor.visit(root);\n this.checkExtendsForNonMatched(root.allExtends);\n return newRoot;\n }\n\n checkExtendsForNonMatched(extendList) {\n const indices = this.extendIndices;\n extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => {\n let selector = '_unknown_';\n try {\n selector = extend.selector.toCSS({});\n }\n catch (_) {}\n\n if (!indices[`${extend.index} ${selector}`]) {\n indices[`${extend.index} ${selector}`] = true;\n logger.warn(`extend '${selector}' has no matches`);\n }\n });\n }\n\n doExtendChaining(extendsList, extendsListTarget, iterationCount) {\n //\n // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering\n // and pasting the selector we would do normally, but we are also adding an extend with the same target selector\n // this means this new extend can then go and alter other extends\n //\n // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors\n // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already\n // processed if we look at each selector at a time, as is done in visitRuleset\n\n let extendIndex;\n\n let targetExtendIndex;\n let matches;\n const extendsToAdd = [];\n let newSelector;\n const extendVisitor = this;\n let selectorPath;\n let extend;\n let targetExtend;\n let newExtend;\n\n iterationCount = iterationCount || 0;\n\n // loop through comparing every extend with every target extend.\n // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place\n // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one\n // and the second is the target.\n // the separation into two lists allows us to process a subset of chains with a bigger set, as is the\n // case when processing media queries\n for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) {\n for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) {\n\n extend = extendsList[extendIndex];\n targetExtend = extendsListTarget[targetExtendIndex];\n\n // look for circular references\n if ( extend.parent_ids.indexOf( targetExtend.object_id ) >= 0 ) { continue; }\n\n // find a match in the target extends self selector (the bit before :extend)\n selectorPath = [targetExtend.selfSelectors[0]];\n matches = extendVisitor.findMatch(extend, selectorPath);\n\n if (matches.length) {\n extend.hasFoundMatches = true;\n\n // we found a match, so for each self selector..\n extend.selfSelectors.forEach(selfSelector => {\n const info = targetExtend.visibilityInfo();\n\n // process the extend as usual\n newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible());\n\n // but now we create a new extend from it\n newExtend = new(tree.Extend)(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info);\n newExtend.selfSelectors = newSelector;\n\n // add the extend onto the list of extends for that selector\n newSelector[newSelector.length - 1].extendList = [newExtend];\n\n // record that we need to add it.\n extendsToAdd.push(newExtend);\n newExtend.ruleset = targetExtend.ruleset;\n\n // remember its parents for circular references\n newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids);\n\n // only process the selector once.. if we have :extend(.a,.b) then multiple\n // extends will look at the same selector path, so when extending\n // we know that any others will be duplicates in terms of what is added to the css\n if (targetExtend.firstExtendOnThisSelectorPath) {\n newExtend.firstExtendOnThisSelectorPath = true;\n targetExtend.ruleset.paths.push(newSelector);\n }\n });\n }\n }\n }\n\n if (extendsToAdd.length) {\n // try to detect circular references to stop a stack overflow.\n // may no longer be needed.\n this.extendChainCount++;\n if (iterationCount > 100) {\n let selectorOne = '{unable to calculate}';\n let selectorTwo = '{unable to calculate}';\n try {\n selectorOne = extendsToAdd[0].selfSelectors[0].toCSS();\n selectorTwo = extendsToAdd[0].selector.toCSS();\n }\n catch (e) {}\n throw { message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})`};\n }\n\n // now process the new extends on the existing rules so that we can handle a extending b extending c extending\n // d extending e...\n return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1));\n } else {\n return extendsToAdd;\n }\n }\n\n visitDeclaration(ruleNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitSelector(selectorNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n let matches;\n let pathIndex;\n let extendIndex;\n const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1];\n const selectorsToAdd = [];\n const extendVisitor = this;\n let selectorPath;\n\n // look at each selector path in the ruleset, find any extend matches and then copy, find and replace\n\n for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) {\n for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) {\n selectorPath = rulesetNode.paths[pathIndex];\n\n // extending extends happens initially, before the main pass\n if (rulesetNode.extendOnEveryPath) { continue; }\n const extendList = selectorPath[selectorPath.length - 1].extendList;\n if (extendList && extendList.length) { continue; }\n\n matches = this.findMatch(allExtends[extendIndex], selectorPath);\n\n if (matches.length) {\n allExtends[extendIndex].hasFoundMatches = true;\n\n allExtends[extendIndex].selfSelectors.forEach(selfSelector => {\n let extendedSelectors;\n extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible());\n selectorsToAdd.push(extendedSelectors);\n });\n }\n }\n }\n rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd);\n }\n\n findMatch(extend, haystackSelectorPath) {\n //\n // look through the haystack selector path to try and find the needle - extend.selector\n // returns an array of selector matches that can then be replaced\n //\n let haystackSelectorIndex;\n\n let hackstackSelector;\n let hackstackElementIndex;\n let haystackElement;\n let targetCombinator;\n let i;\n const extendVisitor = this;\n const needleElements = extend.selector.elements;\n const potentialMatches = [];\n let potentialMatch;\n const matches = [];\n\n // loop through the haystack elements\n for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) {\n hackstackSelector = haystackSelectorPath[haystackSelectorIndex];\n\n for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) {\n\n haystackElement = hackstackSelector.elements[hackstackElementIndex];\n\n // if we allow elements before our match we can add a potential match every time. otherwise only at the first element.\n if (extend.allowBefore || (haystackSelectorIndex === 0 && hackstackElementIndex === 0)) {\n potentialMatches.push({pathIndex: haystackSelectorIndex, index: hackstackElementIndex, matched: 0,\n initialCombinator: haystackElement.combinator});\n }\n\n for (i = 0; i < potentialMatches.length; i++) {\n potentialMatch = potentialMatches[i];\n\n // selectors add \" \" onto the first element. When we use & it joins the selectors together, but if we don't\n // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to\n // work out what the resulting combinator will be\n targetCombinator = haystackElement.combinator.value;\n if (targetCombinator === '' && hackstackElementIndex === 0) {\n targetCombinator = ' ';\n }\n\n // if we don't match, null our match to indicate failure\n if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) ||\n (potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator)) {\n potentialMatch = null;\n } else {\n potentialMatch.matched++;\n }\n\n // if we are still valid and have finished, test whether we have elements after and whether these are allowed\n if (potentialMatch) {\n potentialMatch.finished = potentialMatch.matched === needleElements.length;\n if (potentialMatch.finished &&\n (!extend.allowAfter &&\n (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length))) {\n potentialMatch = null;\n }\n }\n // if null we remove, if not, we are still valid, so either push as a valid match or continue\n if (potentialMatch) {\n if (potentialMatch.finished) {\n potentialMatch.length = needleElements.length;\n potentialMatch.endPathIndex = haystackSelectorIndex;\n potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match\n potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again\n matches.push(potentialMatch);\n }\n } else {\n potentialMatches.splice(i, 1);\n i--;\n }\n }\n }\n }\n return matches;\n }\n\n isElementValuesEqual(elementValue1, elementValue2) {\n if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') {\n return elementValue1 === elementValue2;\n }\n if (elementValue1 instanceof tree.Attribute) {\n if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) {\n return false;\n }\n if (!elementValue1.value || !elementValue2.value) {\n if (elementValue1.value || elementValue2.value) {\n return false;\n }\n return true;\n }\n elementValue1 = elementValue1.value.value || elementValue1.value;\n elementValue2 = elementValue2.value.value || elementValue2.value;\n return elementValue1 === elementValue2;\n }\n elementValue1 = elementValue1.value;\n elementValue2 = elementValue2.value;\n if (elementValue1 instanceof tree.Selector) {\n if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) {\n return false;\n }\n for (let i = 0; i < elementValue1.elements.length; i++) {\n if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) {\n if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) {\n return false;\n }\n }\n if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) {\n return false;\n }\n }\n return true;\n }\n return false;\n }\n\n extendSelector(matches, selectorPath, replacementSelector, isVisible) {\n // for a set of matches, replace each match with the replacement selector\n\n let currentSelectorPathIndex = 0;\n\n let currentSelectorPathElementIndex = 0;\n let path = [];\n let matchIndex;\n let selector;\n let firstElement;\n let match;\n let newElements;\n\n for (matchIndex = 0; matchIndex < matches.length; matchIndex++) {\n match = matches[matchIndex];\n selector = selectorPath[match.pathIndex];\n firstElement = new tree.Element(\n match.initialCombinator,\n replacementSelector.elements[0].value,\n replacementSelector.elements[0].isVariable,\n replacementSelector.elements[0].getIndex(),\n replacementSelector.elements[0].fileInfo()\n );\n\n if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n\n newElements = selector.elements\n .slice(currentSelectorPathElementIndex, match.index)\n .concat([firstElement])\n .concat(replacementSelector.elements.slice(1));\n\n if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) {\n path[path.length - 1].elements =\n path[path.length - 1].elements.concat(newElements);\n } else {\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex));\n\n path.push(new tree.Selector(\n newElements\n ));\n }\n currentSelectorPathIndex = match.endPathIndex;\n currentSelectorPathElementIndex = match.endPathElementIndex;\n if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) {\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n }\n\n if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathIndex++;\n }\n\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length));\n path = path.map(currentValue => {\n // we can re-use elements here, because the visibility property matters only for selectors\n const derived = currentValue.createDerived(currentValue.elements);\n if (isVisible) {\n derived.ensureVisibility();\n } else {\n derived.ensureInvisibility();\n }\n return derived;\n });\n return path;\n }\n\n visitMedia(mediaNode, visitArgs) {\n let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitMediaOut(mediaNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n}\n\nexport default ProcessExtendsVisitor;\n","import Visitor from './visitor';\n\nclass JoinSelectorVisitor {\n constructor() {\n this.contexts = [[]];\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n return this._visitor.visit(root);\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n const paths = [];\n let selectors;\n\n this.contexts.push(paths);\n\n if (!rulesetNode.root) {\n selectors = rulesetNode.selectors;\n if (selectors) {\n selectors = selectors.filter(selector => selector.getIsOutput());\n rulesetNode.selectors = selectors.length ? selectors : (selectors = null);\n if (selectors) { rulesetNode.joinSelectors(paths, context, selectors); }\n }\n if (!selectors) { rulesetNode.rules = null; }\n rulesetNode.paths = paths;\n }\n }\n\n visitRulesetOut(rulesetNode) {\n this.contexts.length = this.contexts.length - 1;\n }\n\n visitMedia(mediaNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia);\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n if (atRuleNode.rules && atRuleNode.rules.length) {\n atRuleNode.rules[0].root = (atRuleNode.isRooted || context.length === 0 || null);\n }\n }\n}\n\nexport default JoinSelectorVisitor;\n","import tree from '../tree';\nimport Visitor from './visitor';\n\nclass CSSVisitorUtils {\n constructor(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n }\n\n containsSilentNonBlockedChild(bodyRules) {\n let rule;\n if (!bodyRules) {\n return false;\n }\n for (let r = 0; r < bodyRules.length; r++) {\n rule = bodyRules[r];\n if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) {\n // the atrule contains something that was referenced (likely by extend)\n // therefore it needs to be shown in output too\n return true;\n }\n }\n return false;\n }\n\n keepOnlyVisibleChilds(owner) {\n if (owner && owner.rules) {\n owner.rules = owner.rules.filter(thing => thing.isVisible());\n }\n }\n\n isEmpty(owner) {\n return (owner && owner.rules) \n ? (owner.rules.length === 0) : true;\n }\n\n hasVisibleSelector(rulesetNode) {\n return (rulesetNode && rulesetNode.paths)\n ? (rulesetNode.paths.length > 0) : false;\n }\n\n resolveVisibility(node, originalRules) {\n if (!node.blocksVisibility()) {\n if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) {\n return ;\n }\n\n return node;\n }\n\n const compiledRulesBody = node.rules[0];\n this.keepOnlyVisibleChilds(compiledRulesBody);\n\n if (this.isEmpty(compiledRulesBody)) {\n return ;\n }\n\n node.ensureVisibility();\n node.removeVisibilityBlock();\n\n return node;\n }\n\n isVisibleRuleset(rulesetNode) {\n if (rulesetNode.firstRoot) {\n return true;\n }\n\n if (this.isEmpty(rulesetNode)) {\n return false;\n }\n\n if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) {\n return false;\n }\n\n return true;\n }\n}\n\nconst ToCSSVisitor = function(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n this.utils = new CSSVisitorUtils(context);\n};\n\nToCSSVisitor.prototype = {\n isReplacing: true,\n run: function (root) {\n return this._visitor.visit(root);\n },\n\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.blocksVisibility() || declNode.variable) {\n return;\n }\n return declNode;\n },\n\n visitMixinDefinition: function (mixinNode, visitArgs) {\n // mixin definitions do not get eval'd - this means they keep state\n // so we have to clear that state here so it isn't used if toCSS is called twice\n mixinNode.frames = [];\n },\n\n visitExtend: function (extendNode, visitArgs) {\n },\n\n visitComment: function (commentNode, visitArgs) {\n if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) {\n return;\n }\n return commentNode;\n },\n\n visitMedia: function(mediaNode, visitArgs) {\n const originalRules = mediaNode.rules[0].rules;\n mediaNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n return this.utils.resolveVisibility(mediaNode, originalRules);\n },\n\n visitImport: function (importNode, visitArgs) {\n if (importNode.blocksVisibility()) {\n return ;\n }\n return importNode;\n },\n\n visitAtRule: function(atRuleNode, visitArgs) {\n if (atRuleNode.rules && atRuleNode.rules.length) {\n return this.visitAtRuleWithBody(atRuleNode, visitArgs);\n } else {\n return this.visitAtRuleWithoutBody(atRuleNode, visitArgs);\n }\n },\n\n visitAnonymous: function(anonymousNode, visitArgs) {\n if (!anonymousNode.blocksVisibility()) {\n anonymousNode.accept(this._visitor);\n return anonymousNode;\n }\n },\n\n visitAtRuleWithBody: function(atRuleNode, visitArgs) {\n // if there is only one nested ruleset and that one has no path, then it is\n // just fake ruleset\n function hasFakeRuleset(atRuleNode) {\n const bodyRules = atRuleNode.rules;\n return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0);\n }\n function getBodyRules(atRuleNode) {\n const nodeRules = atRuleNode.rules;\n if (hasFakeRuleset(atRuleNode)) {\n return nodeRules[0].rules;\n }\n\n return nodeRules;\n }\n // it is still true that it is only one ruleset in array\n // this is last such moment\n // process childs\n const originalRules = getBodyRules(atRuleNode);\n atRuleNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n if (!this.utils.isEmpty(atRuleNode)) {\n this._mergeRules(atRuleNode.rules[0].rules);\n }\n\n return this.utils.resolveVisibility(atRuleNode, originalRules);\n },\n\n visitAtRuleWithoutBody: function(atRuleNode, visitArgs) {\n if (atRuleNode.blocksVisibility()) {\n return;\n }\n\n if (atRuleNode.name === '@charset') {\n // Only output the debug info together with subsequent @charset definitions\n // a comment (or @media statement) before the actual @charset atrule would\n // be considered illegal css as it has to be on the first line\n if (this.charset) {\n if (atRuleNode.debugInfo) {\n const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\\n/g, '')} */\\n`);\n comment.debugInfo = atRuleNode.debugInfo;\n return this._visitor.visit(comment);\n }\n return;\n }\n this.charset = true;\n }\n\n return atRuleNode;\n },\n\n checkValidNodes: function(rules, isRoot) {\n if (!rules) {\n return;\n }\n\n for (let i = 0; i < rules.length; i++) {\n const ruleNode = rules[i];\n if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) {\n throw { message: 'Properties must be inside selector blocks. They cannot be in the root',\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode instanceof tree.Call) {\n throw { message: `Function '${ruleNode.name}' is undefined`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode.type && !ruleNode.allowRoot) {\n throw { message: `${ruleNode.type} node returned by a function is not valid here`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n }\n },\n\n visitRuleset: function (rulesetNode, visitArgs) {\n // at this point rulesets are nested into each other\n let rule;\n\n const rulesets = [];\n\n this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot);\n\n if (!rulesetNode.root) {\n // remove invisible paths\n this._compileRulesetPaths(rulesetNode);\n\n // remove rulesets from this ruleset body and compile them separately\n const nodeRules = rulesetNode.rules;\n\n let nodeRuleCnt = nodeRules ? nodeRules.length : 0;\n for (let i = 0; i < nodeRuleCnt; ) {\n rule = nodeRules[i];\n if (rule && rule.rules) {\n // visit because we are moving them out from being a child\n rulesets.push(this._visitor.visit(rule));\n nodeRules.splice(i, 1);\n nodeRuleCnt--;\n continue;\n }\n i++;\n }\n // accept the visitor to remove rules and refactor itself\n // then we can decide nogw whether we want it or not\n // compile body\n if (nodeRuleCnt > 0) {\n rulesetNode.accept(this._visitor);\n } else {\n rulesetNode.rules = null;\n }\n visitArgs.visitDeeper = false;\n } else { // if (! rulesetNode.root) {\n rulesetNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n }\n\n if (rulesetNode.rules) {\n this._mergeRules(rulesetNode.rules);\n this._removeDuplicateRules(rulesetNode.rules);\n }\n\n // now decide whether we keep the ruleset\n if (this.utils.isVisibleRuleset(rulesetNode)) {\n rulesetNode.ensureVisibility();\n rulesets.splice(0, 0, rulesetNode);\n }\n\n if (rulesets.length === 1) {\n return rulesets[0];\n }\n return rulesets;\n },\n\n _compileRulesetPaths: function(rulesetNode) {\n if (rulesetNode.paths) {\n rulesetNode.paths = rulesetNode.paths\n .filter(p => {\n let i;\n if (p[0].elements[0].combinator.value === ' ') {\n p[0].elements[0].combinator = new(tree.Combinator)('');\n }\n for (i = 0; i < p.length; i++) {\n if (p[i].isVisible() && p[i].getIsOutput()) {\n return true;\n }\n }\n return false;\n });\n }\n },\n\n _removeDuplicateRules: function(rules) {\n if (!rules) { return; }\n\n // remove duplicates\n const ruleCache = {};\n\n let ruleList;\n let rule;\n let i;\n\n for (i = rules.length - 1; i >= 0 ; i--) {\n rule = rules[i];\n if (rule instanceof tree.Declaration) {\n if (!ruleCache[rule.name]) {\n ruleCache[rule.name] = rule;\n } else {\n ruleList = ruleCache[rule.name];\n if (ruleList instanceof tree.Declaration) {\n ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)];\n }\n const ruleCSS = rule.toCSS(this._context);\n if (ruleList.indexOf(ruleCSS) !== -1) {\n rules.splice(i, 1);\n } else {\n ruleList.push(ruleCSS);\n }\n }\n }\n }\n },\n\n _mergeRules: function(rules) {\n if (!rules) {\n return; \n }\n\n const groups = {};\n const groupsArr = [];\n\n for (let i = 0; i < rules.length; i++) {\n const rule = rules[i];\n if (rule.merge) {\n const key = rule.name;\n groups[key] ? rules.splice(i--, 1) : \n groupsArr.push(groups[key] = []);\n groups[key].push(rule);\n }\n }\n\n groupsArr.forEach(group => {\n if (group.length > 0) {\n const result = group[0];\n let space = [];\n const comma = [new tree.Expression(space)];\n group.forEach(rule => {\n if ((rule.merge === '+') && (space.length > 0)) {\n comma.push(new tree.Expression(space = []));\n }\n space.push(rule.value);\n result.important = result.important || rule.important;\n });\n result.value = new tree.Value(comma);\n }\n });\n }\n};\n\nexport default ToCSSVisitor;\n","import Visitor from './visitor';\nimport ImportVisitor from './import-visitor';\nimport MarkVisibleSelectorsVisitor from './set-tree-visibility-visitor';\nimport ExtendVisitor from './extend-visitor';\nimport JoinSelectorVisitor from './join-selector-visitor';\nimport ToCSSVisitor from './to-css-visitor';\n\nexport default {\n Visitor,\n ImportVisitor,\n MarkVisibleSelectorsVisitor,\n ExtendVisitor,\n JoinSelectorVisitor,\n ToCSSVisitor\n};\n","// Split the input into chunks.\nexport default (input, fail) => {\n const len = input.length;\n let level = 0;\n let parenLevel = 0;\n let lastOpening;\n let lastOpeningParen;\n let lastMultiComment;\n let lastMultiCommentEndBrace;\n const chunks = [];\n let emitFrom = 0;\n let chunkerCurrentIndex;\n let currentChunkStartIndex;\n let cc;\n let cc2;\n let matched;\n\n function emitChunk(force) {\n const len = chunkerCurrentIndex - emitFrom;\n if (((len < 512) && !force) || !len) {\n return;\n }\n chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1));\n emitFrom = chunkerCurrentIndex + 1;\n }\n\n for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc = input.charCodeAt(chunkerCurrentIndex);\n if (((cc >= 97) && (cc <= 122)) || (cc < 34)) {\n // a-z or whitespace\n continue;\n }\n\n switch (cc) {\n case 40: // (\n parenLevel++;\n lastOpeningParen = chunkerCurrentIndex;\n continue;\n case 41: // )\n if (--parenLevel < 0) {\n return fail('missing opening `(`', chunkerCurrentIndex);\n }\n continue;\n case 59: // ;\n if (!parenLevel) { emitChunk(); }\n continue;\n case 123: // {\n level++;\n lastOpening = chunkerCurrentIndex;\n continue;\n case 125: // }\n if (--level < 0) {\n return fail('missing opening `{`', chunkerCurrentIndex);\n }\n if (!level && !parenLevel) { emitChunk(); }\n continue;\n case 92: // \\\n if (chunkerCurrentIndex < len - 1) { chunkerCurrentIndex++; continue; }\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n case 34:\n case 39:\n case 96: // \", ' and `\n matched = 0;\n currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 > 96) { continue; }\n if (cc2 == cc) { matched = 1; break; }\n if (cc2 == 92) { // \\\n if (chunkerCurrentIndex == len - 1) {\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n }\n chunkerCurrentIndex++;\n }\n }\n if (matched) { continue; }\n return fail(`unmatched \\`${String.fromCharCode(cc)}\\``, currentChunkStartIndex);\n case 47: // /, check for comment\n if (parenLevel || (chunkerCurrentIndex == len - 1)) { continue; }\n cc2 = input.charCodeAt(chunkerCurrentIndex + 1);\n if (cc2 == 47) {\n // //, find lnfeed\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if ((cc2 <= 13) && ((cc2 == 10) || (cc2 == 13))) { break; }\n }\n } else if (cc2 == 42) {\n // /*, find */\n lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 == 125) { lastMultiCommentEndBrace = chunkerCurrentIndex; }\n if (cc2 != 42) { continue; }\n if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { break; }\n }\n if (chunkerCurrentIndex == len - 1) {\n return fail('missing closing `*/`', currentChunkStartIndex);\n }\n chunkerCurrentIndex++;\n }\n continue;\n case 42: // *, check for unmatched */\n if ((chunkerCurrentIndex < len - 1) && (input.charCodeAt(chunkerCurrentIndex + 1) == 47)) {\n return fail('unmatched `/*`', chunkerCurrentIndex);\n }\n continue;\n }\n }\n\n if (level !== 0) {\n if ((lastMultiComment > lastOpening) && (lastMultiCommentEndBrace > lastMultiComment)) {\n return fail('missing closing `}` or `*/`', lastOpening);\n } else {\n return fail('missing closing `}`', lastOpening);\n }\n } else if (parenLevel !== 0) {\n return fail('missing closing `)`', lastOpeningParen);\n }\n\n emitChunk(true);\n return chunks;\n};\n","import chunker from './chunker';\n\nexport default () => {\n let // Less input string\n input;\n\n let // current chunk\n j;\n\n const // holds state for backtracking\n saveStack = [];\n\n let // furthest index the parser has gone to\n furthest;\n\n let // if this is furthest we got to, this is the probably cause\n furthestPossibleErrorMessage;\n\n let // chunkified input\n chunks;\n\n let // current chunk\n current;\n\n let // index of current chunk, in `input`\n currentPos;\n\n const parserInput = {};\n const CHARCODE_SPACE = 32;\n const CHARCODE_TAB = 9;\n const CHARCODE_LF = 10;\n const CHARCODE_CR = 13;\n const CHARCODE_PLUS = 43;\n const CHARCODE_COMMA = 44;\n const CHARCODE_FORWARD_SLASH = 47;\n const CHARCODE_9 = 57;\n\n function skipWhitespace(length) {\n const oldi = parserInput.i;\n const oldj = j;\n const curr = parserInput.i - currentPos;\n const endIndex = parserInput.i + current.length - curr;\n const mem = (parserInput.i += length);\n const inp = input;\n let c;\n let nextChar;\n let comment;\n\n for (; parserInput.i < endIndex; parserInput.i++) {\n c = inp.charCodeAt(parserInput.i);\n\n if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) {\n nextChar = inp.charAt(parserInput.i + 1);\n if (nextChar === '/') {\n comment = {index: parserInput.i, isLineComment: true};\n let nextNewLine = inp.indexOf('\\n', parserInput.i + 2);\n if (nextNewLine < 0) {\n nextNewLine = endIndex;\n }\n parserInput.i = nextNewLine;\n comment.text = inp.substr(comment.index, parserInput.i - comment.index);\n parserInput.commentStore.push(comment);\n continue;\n } else if (nextChar === '*') {\n const nextStarSlash = inp.indexOf('*/', parserInput.i + 2);\n if (nextStarSlash >= 0) {\n comment = {\n index: parserInput.i,\n text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i),\n isLineComment: false\n };\n parserInput.i += comment.text.length - 1;\n parserInput.commentStore.push(comment);\n continue;\n }\n }\n break;\n }\n\n if ((c !== CHARCODE_SPACE) && (c !== CHARCODE_LF) && (c !== CHARCODE_TAB) && (c !== CHARCODE_CR)) {\n break;\n }\n }\n\n current = current.slice(length + parserInput.i - mem + curr);\n currentPos = parserInput.i;\n\n if (!current.length) {\n if (j < chunks.length - 1) {\n current = chunks[++j];\n skipWhitespace(0); // skip space at the beginning of a chunk\n return true; // things changed\n }\n parserInput.finished = true;\n }\n\n return oldi !== parserInput.i || oldj !== j;\n }\n\n parserInput.save = () => {\n currentPos = parserInput.i;\n saveStack.push( { current, i: parserInput.i, j });\n };\n parserInput.restore = possibleErrorMessage => {\n\n if (parserInput.i > furthest || (parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage)) {\n furthest = parserInput.i;\n furthestPossibleErrorMessage = possibleErrorMessage;\n }\n const state = saveStack.pop();\n current = state.current;\n currentPos = parserInput.i = state.i;\n j = state.j;\n };\n parserInput.forget = () => {\n saveStack.pop();\n };\n parserInput.isWhitespace = offset => {\n const pos = parserInput.i + (offset || 0);\n const code = input.charCodeAt(pos);\n return (code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF);\n };\n\n // Specialization of $(tok)\n parserInput.$re = tok => {\n if (parserInput.i > currentPos) {\n current = current.slice(parserInput.i - currentPos);\n currentPos = parserInput.i;\n }\n\n const m = tok.exec(current);\n if (!m) {\n return null;\n }\n\n skipWhitespace(m[0].length);\n if (typeof m === 'string') {\n return m;\n }\n\n return m.length === 1 ? m[0] : m;\n };\n\n parserInput.$char = tok => {\n if (input.charAt(parserInput.i) !== tok) {\n return null;\n }\n skipWhitespace(1);\n return tok;\n };\n\n parserInput.$str = tok => {\n const tokLength = tok.length;\n\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tokLength; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return null;\n }\n }\n\n skipWhitespace(tokLength);\n return tok;\n };\n\n parserInput.$quoted = loc => {\n const pos = loc || parserInput.i;\n const startChar = input.charAt(pos);\n\n if (startChar !== '\\'' && startChar !== '\"') {\n return;\n }\n const length = input.length;\n const currentPosition = pos;\n\n for (let i = 1; i + currentPosition < length; i++) {\n const nextChar = input.charAt(i + currentPosition);\n switch (nextChar) {\n case '\\\\':\n i++;\n continue;\n case '\\r':\n case '\\n':\n break;\n case startChar:\n const str = input.substr(currentPosition, i + 1);\n if (!loc && loc !== 0) {\n skipWhitespace(i + 1);\n return str\n }\n return [startChar, str];\n default:\n }\n }\n return null;\n };\n\n /**\n * Permissive parsing. Ignores everything except matching {} [] () and quotes\n * until matching token (outside of blocks)\n */\n parserInput.$parseUntil = tok => {\n let quote = '';\n let returnVal = null;\n let inComment = false;\n let blockDepth = 0;\n const blockStack = [];\n const parseGroups = [];\n const length = input.length;\n const startPos = parserInput.i;\n let lastPos = parserInput.i;\n let i = parserInput.i;\n let loop = true;\n let testChar;\n\n if (typeof tok === 'string') {\n testChar = char => char === tok\n } else {\n testChar = char => tok.test(char)\n }\n\n do {\n let prevChar;\n let nextChar = input.charAt(i);\n if (blockDepth === 0 && testChar(nextChar)) {\n returnVal = input.substr(lastPos, i - lastPos);\n if (returnVal) {\n parseGroups.push(returnVal);\n }\n else {\n parseGroups.push(' ');\n }\n returnVal = parseGroups;\n skipWhitespace(i - startPos);\n loop = false\n } else {\n if (inComment) {\n if (nextChar === '*' && \n input.charAt(i + 1) === '/') {\n i++;\n blockDepth--;\n inComment = false;\n }\n i++;\n continue;\n }\n switch (nextChar) {\n case '\\\\':\n i++;\n nextChar = input.charAt(i);\n parseGroups.push(input.substr(lastPos, i - lastPos + 1));\n lastPos = i + 1;\n break;\n case '/':\n if (input.charAt(i + 1) === '*') {\n i++;\n inComment = true;\n blockDepth++;\n }\n break;\n case '\\'':\n case '\"':\n quote = parserInput.$quoted(i);\n if (quote) {\n parseGroups.push(input.substr(lastPos, i - lastPos), quote);\n i += quote[1].length - 1;\n lastPos = i + 1;\n }\n else {\n skipWhitespace(i - startPos);\n returnVal = nextChar;\n loop = false;\n }\n break;\n case '{':\n blockStack.push('}');\n blockDepth++;\n break;\n case '(':\n blockStack.push(')');\n blockDepth++;\n break;\n case '[':\n blockStack.push(']');\n blockDepth++;\n break;\n case '}':\n case ')':\n case ']':\n const expected = blockStack.pop();\n if (nextChar === expected) {\n blockDepth--;\n } else {\n // move the parser to the error and return expected\n skipWhitespace(i - startPos);\n returnVal = expected;\n loop = false;\n }\n }\n i++;\n if (i > length) {\n loop = false;\n }\n }\n prevChar = nextChar;\n } while (loop);\n\n return returnVal ? returnVal : null;\n }\n\n parserInput.autoCommentAbsorb = true;\n parserInput.commentStore = [];\n parserInput.finished = false;\n\n // Same as $(), but don't change the state of the parser,\n // just return the match.\n parserInput.peek = tok => {\n if (typeof tok === 'string') {\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tok.length; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return false;\n }\n }\n return true;\n } else {\n return tok.test(current);\n }\n };\n\n // Specialization of peek()\n // TODO remove or change some currentChar calls to peekChar\n parserInput.peekChar = tok => input.charAt(parserInput.i) === tok;\n\n parserInput.currentChar = () => input.charAt(parserInput.i);\n\n parserInput.prevChar = () => input.charAt(parserInput.i - 1);\n\n parserInput.getInput = () => input;\n\n parserInput.peekNotNumeric = () => {\n const c = input.charCodeAt(parserInput.i);\n // Is the first char of the dimension 0-9, '.', '+' or '-'\n return (c > CHARCODE_9 || c < CHARCODE_PLUS) || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA;\n };\n\n parserInput.start = (str, chunkInput, failFunction) => {\n input = str;\n parserInput.i = j = currentPos = furthest = 0;\n\n // chunking apparently makes things quicker (but my tests indicate\n // it might actually make things slower in node at least)\n // and it is a non-perfect parse - it can't recognise\n // unquoted urls, meaning it can't distinguish comments\n // meaning comments with quotes or {}() in them get 'counted'\n // and then lead to parse errors.\n // In addition if the chunking chunks in the wrong place we might\n // not be able to parse a parser statement in one go\n // this is officially deprecated but can be switched on via an option\n // in the case it causes too much performance issues.\n if (chunkInput) {\n chunks = chunker(str, failFunction);\n } else {\n chunks = [str];\n }\n\n current = chunks[0];\n\n skipWhitespace(0);\n };\n\n parserInput.end = () => {\n let message;\n const isFinished = parserInput.i >= input.length;\n\n if (parserInput.i < furthest) {\n message = furthestPossibleErrorMessage;\n parserInput.i = furthest;\n }\n return {\n isFinished,\n furthest: parserInput.i,\n furthestPossibleErrorMessage: message,\n furthestReachedEnd: parserInput.i >= input.length - 1,\n furthestChar: input[parserInput.i]\n };\n };\n\n return parserInput;\n};\n","import LessError from '../less-error';\nimport tree from '../tree';\nimport visitors from '../visitors';\nimport getParserInput from './parser-input';\nimport * as utils from '../utils';\nimport functionRegistry from '../functions/function-registry';\n\n//\n// less.js - parser\n//\n// A relatively straight-forward predictive parser.\n// There is no tokenization/lexing stage, the input is parsed\n// in one sweep.\n//\n// To make the parser fast enough to run in the browser, several\n// optimization had to be made:\n//\n// - Matching and slicing on a huge input is often cause of slowdowns.\n// The solution is to chunkify the input into smaller strings.\n// The chunks are stored in the `chunks` var,\n// `j` holds the current chunk index, and `currentPos` holds\n// the index of the current chunk in relation to `input`.\n// This gives us an almost 4x speed-up.\n//\n// - In many cases, we don't need to match individual tokens;\n// for example, if a value doesn't hold any variables, operations\n// or dynamic references, the parser can effectively 'skip' it,\n// treating it as a literal.\n// An example would be '1px solid #000' - which evaluates to itself,\n// we don't need to know what the individual components are.\n// The drawback, of course is that you don't get the benefits of\n// syntax-checking on the CSS. This gives us a 50% speed-up in the parser,\n// and a smaller speed-up in the code-gen.\n//\n//\n// Token matching is done with the `$` function, which either takes\n// a terminal string or regexp, or a non-terminal function to call.\n// It also takes care of moving all the indices forwards.\n//\n\nconst Parser = function Parser(context, imports, fileInfo) {\n let parsers;\n const parserInput = getParserInput();\n\n function error(msg, type) {\n throw new LessError(\n {\n index: parserInput.i,\n filename: fileInfo.filename,\n type: type || 'Syntax',\n message: msg\n },\n imports\n );\n }\n\n function expect(arg, msg) {\n // some older browsers return typeof 'function' for RegExp\n const result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg);\n if (result) {\n return result;\n }\n \n error(msg || (typeof arg === 'string'\n ? `expected '${arg}' got '${parserInput.currentChar()}'`\n : 'unexpected token'));\n }\n\n // Specialization of expect()\n function expectChar(arg, msg) {\n if (parserInput.$char(arg)) {\n return arg;\n }\n error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`);\n }\n\n function getDebugInfo(index) {\n const filename = fileInfo.filename;\n\n return {\n lineNumber: utils.getLocation(index, parserInput.getInput()).line + 1,\n fileName: filename\n };\n }\n\n /**\n * Used after initial parsing to create nodes on the fly\n * \n * @param {String} str - string to parse \n * @param {Array} parseList - array of parsers to run input through e.g. [\"value\", \"important\"]\n * @param {Number} currentIndex - start number to begin indexing\n * @param {Object} fileInfo - fileInfo to attach to created nodes\n */\n function parseNode(str, parseList, currentIndex, fileInfo, callback) {\n let result;\n const returnNodes = [];\n const parser = parserInput;\n\n try {\n parser.start(str, false, function fail(msg, index) {\n callback({\n message: msg,\n index: index + currentIndex\n });\n });\n for (let x = 0, p, i; (p = parseList[x]); x++) {\n i = parser.i;\n result = parsers[p]();\n if (result) {\n result._index = i + currentIndex;\n result._fileInfo = fileInfo;\n returnNodes.push(result);\n }\n else {\n returnNodes.push(null);\n }\n }\n\n const endInfo = parser.end();\n if (endInfo.isFinished) {\n callback(null, returnNodes);\n }\n else {\n callback(true, null);\n }\n } catch (e) {\n throw new LessError({\n index: e.index + currentIndex,\n message: e.message\n }, imports, fileInfo.filename);\n }\n }\n\n //\n // The Parser\n //\n return {\n parserInput,\n imports,\n fileInfo,\n parseNode,\n //\n // Parse an input string into an abstract syntax tree,\n // @param str A string containing 'less' markup\n // @param callback call `callback` when done.\n // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply\n //\n parse: function (str, callback, additionalData) {\n let root;\n let error = null;\n let globalVars;\n let modifyVars;\n let ignored;\n let preText = '';\n\n globalVars = (additionalData && additionalData.globalVars) ? `${Parser.serializeVars(additionalData.globalVars)}\\n` : '';\n modifyVars = (additionalData && additionalData.modifyVars) ? `\\n${Parser.serializeVars(additionalData.modifyVars)}` : '';\n\n if (context.pluginManager) {\n const preProcessors = context.pluginManager.getPreProcessors();\n for (let i = 0; i < preProcessors.length; i++) {\n str = preProcessors[i].process(str, { context, imports, fileInfo });\n }\n }\n\n if (globalVars || (additionalData && additionalData.banner)) {\n preText = ((additionalData && additionalData.banner) ? additionalData.banner : '') + globalVars;\n ignored = imports.contentsIgnoredChars;\n ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0;\n ignored[fileInfo.filename] += preText.length;\n }\n\n str = str.replace(/\\r\\n?/g, '\\n');\n // Remove potential UTF Byte Order Mark\n str = preText + str.replace(/^\\uFEFF/, '') + modifyVars;\n imports.contents[fileInfo.filename] = str;\n\n // Start with the primary rule.\n // The whole syntax tree is held under a Ruleset node,\n // with the `root` property set to true, so no `{}` are\n // output. The callback is called when the input is parsed.\n try {\n parserInput.start(str, context.chunkInput, function fail(msg, index) {\n throw new LessError({\n index,\n type: 'Parse',\n message: msg,\n filename: fileInfo.filename\n }, imports);\n });\n\n tree.Node.prototype.parse = this;\n root = new tree.Ruleset(null, this.parsers.primary());\n tree.Node.prototype.rootNode = root;\n root.root = true;\n root.firstRoot = true;\n root.functionRegistry = functionRegistry.inherit();\n \n } catch (e) {\n return callback(new LessError(e, imports, fileInfo.filename));\n }\n\n // If `i` is smaller than the `input.length - 1`,\n // it means the parser wasn't able to parse the whole\n // string, so we've got a parsing error.\n //\n // We try to extract a \\n delimited string,\n // showing the line where the parse error occurred.\n // We split it up into two parts (the part which parsed,\n // and the part which didn't), so we can color them differently.\n const endInfo = parserInput.end();\n if (!endInfo.isFinished) {\n\n let message = endInfo.furthestPossibleErrorMessage;\n\n if (!message) {\n message = 'Unrecognised input';\n if (endInfo.furthestChar === '}') {\n message += '. Possibly missing opening \\'{\\'';\n } else if (endInfo.furthestChar === ')') {\n message += '. Possibly missing opening \\'(\\'';\n } else if (endInfo.furthestReachedEnd) {\n message += '. Possibly missing something';\n }\n }\n\n error = new LessError({\n type: 'Parse',\n message,\n index: endInfo.furthest,\n filename: fileInfo.filename\n }, imports);\n }\n\n const finish = e => {\n e = error || e || imports.error;\n\n if (e) {\n if (!(e instanceof LessError)) {\n e = new LessError(e, imports, fileInfo.filename);\n }\n\n return callback(e);\n }\n else {\n return callback(null, root);\n }\n };\n\n if (context.processImports !== false) {\n new visitors.ImportVisitor(imports, finish)\n .run(root);\n } else {\n return finish();\n }\n },\n\n //\n // Here in, the parsing rules/functions\n //\n // The basic structure of the syntax tree generated is as follows:\n //\n // Ruleset -> Declaration -> Value -> Expression -> Entity\n //\n // Here's some Less code:\n //\n // .class {\n // color: #fff;\n // border: 1px solid #000;\n // width: @w + 4px;\n // > .child {...}\n // }\n //\n // And here's what the parse tree might look like:\n //\n // Ruleset (Selector '.class', [\n // Declaration (\"color\", Value ([Expression [Color #fff]]))\n // Declaration (\"border\", Value ([Expression [Dimension 1px][Keyword \"solid\"][Color #000]]))\n // Declaration (\"width\", Value ([Expression [Operation \" + \" [Variable \"@w\"][Dimension 4px]]]))\n // Ruleset (Selector [Element '>', '.child'], [...])\n // ])\n //\n // In general, most rules will try to parse a token with the `$re()` function, and if the return\n // value is truly, will return a new node, of the relevant type. Sometimes, we need to check\n // first, before parsing, that's when we use `peek()`.\n //\n parsers: parsers = {\n //\n // The `primary` rule is the *entry* and *exit* point of the parser.\n // The rules here can appear at any level of the parse tree.\n //\n // The recursive nature of the grammar is an interplay between the `block`\n // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,\n // as represented by this simplified grammar:\n //\n // primary → (ruleset | declaration)+\n // ruleset → selector+ block\n // block → '{' primary '}'\n //\n // Only at one point is the primary rule not called from the\n // block rule: at the root level.\n //\n primary: function () {\n const mixin = this.mixin;\n let root = [];\n let node;\n\n while (true) {\n while (true) {\n node = this.comment();\n if (!node) { break; }\n root.push(node);\n }\n // always process comments before deciding if finished\n if (parserInput.finished) {\n break;\n }\n if (parserInput.peek('}')) {\n break;\n }\n\n node = this.extendRule();\n if (node) {\n root = root.concat(node);\n continue;\n }\n\n node = mixin.definition() || this.declaration() || this.ruleset() ||\n mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule();\n if (node) {\n root.push(node);\n } else {\n let foundSemiColon = false;\n while (parserInput.$char(';')) {\n foundSemiColon = true;\n }\n if (!foundSemiColon) {\n break;\n }\n }\n }\n\n return root;\n },\n\n // comments are collected by the main parsing mechanism and then assigned to nodes\n // where the current structure allows it\n comment: function () {\n if (parserInput.commentStore.length) {\n const comment = parserInput.commentStore.shift();\n return new(tree.Comment)(comment.text, comment.isLineComment, comment.index, fileInfo);\n }\n },\n\n //\n // Entities are tokens which can be found inside an Expression\n //\n entities: {\n mixinLookup: function() {\n return parsers.mixin.call(true, true);\n },\n //\n // A string, which supports escaping \" and '\n //\n // \"milky way\" 'he\\'s the one!'\n //\n quoted: function (forceEscaped) {\n let str;\n const index = parserInput.i;\n let isEscaped = false;\n\n parserInput.save();\n if (parserInput.$char('~')) {\n isEscaped = true;\n } else if (forceEscaped) {\n parserInput.restore();\n return;\n }\n\n str = parserInput.$quoted();\n if (!str) {\n parserInput.restore();\n return;\n }\n parserInput.forget();\n\n return new(tree.Quoted)(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo);\n },\n\n //\n // A catch-all word, such as:\n //\n // black border-collapse\n //\n keyword: function () {\n const k = parserInput.$char('%') || parserInput.$re(/^\\[?(?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\\]?/);\n if (k) {\n return tree.Color.fromKeyword(k) || new(tree.Keyword)(k);\n }\n },\n\n //\n // A function call\n //\n // rgb(255, 0, 255)\n //\n // The arguments are parsed with the `entities.arguments` parser.\n //\n call: function () {\n let name;\n let args;\n let func;\n const index = parserInput.i;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (parserInput.peek(/^url\\(/i)) {\n return;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^([\\w-]+|%|progid:[\\w\\.]+)\\(/);\n if (!name) {\n parserInput.forget(); \n return;\n }\n\n name = name[1];\n func = this.customFuncCall(name);\n if (func) {\n args = func.parse();\n if (args && func.stop) {\n parserInput.forget();\n return args;\n }\n }\n\n args = this.arguments(args);\n\n if (!parserInput.$char(')')) {\n parserInput.restore('Could not parse call arguments or missing \\')\\'');\n return;\n }\n\n parserInput.forget();\n\n return new(tree.Call)(name, args, index, fileInfo);\n },\n \n //\n // Parsing rules for functions with non-standard args, e.g.:\n //\n // boolean(not(2 > 1))\n //\n // This is a quick prototype, to be modified/improved when\n // more custom-parsed funcs come (e.g. `selector(...)`)\n //\n\n customFuncCall: function (name) {\n /* Ideally the table is to be moved out of here for faster perf.,\n but it's quite tricky since it relies on all these `parsers`\n and `expect` available only here */\n return {\n alpha: f(parsers.ieAlpha, true),\n boolean: f(condition),\n 'if': f(condition)\n }[name.toLowerCase()];\n\n function f(parse, stop) {\n return {\n parse, // parsing function\n stop // when true - stop after parse() and return its result, \n // otherwise continue for plain args\n };\n }\n \n function condition() {\n return [expect(parsers.condition, 'expected condition')];\n }\n },\n\n arguments: function (prevArgs) {\n let argsComma = prevArgs || [];\n const argsSemiColon = [];\n let isSemiColonSeparated;\n let value;\n\n parserInput.save();\n\n while (true) {\n if (prevArgs) {\n prevArgs = false;\n } else {\n value = parsers.detachedRuleset() || this.assignment() || parsers.expression();\n if (!value) {\n break;\n }\n\n if (value.value && value.value.length == 1) {\n value = value.value[0];\n }\n\n argsComma.push(value);\n }\n\n if (parserInput.$char(',')) {\n continue;\n }\n\n if (parserInput.$char(';') || isSemiColonSeparated) {\n isSemiColonSeparated = true;\n value = (argsComma.length < 1) ? argsComma[0]\n : new tree.Value(argsComma);\n argsSemiColon.push(value);\n argsComma = [];\n }\n }\n\n parserInput.forget();\n return isSemiColonSeparated ? argsSemiColon : argsComma;\n },\n literal: function () {\n return this.dimension() ||\n this.color() ||\n this.quoted() ||\n this.unicodeDescriptor();\n },\n\n // Assignments are argument entities for calls.\n // They are present in ie filter properties as shown below.\n //\n // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )\n //\n\n assignment: function () {\n let key;\n let value;\n parserInput.save();\n key = parserInput.$re(/^\\w+(?=\\s?=)/i);\n if (!key) {\n parserInput.restore();\n return;\n }\n if (!parserInput.$char('=')) {\n parserInput.restore();\n return;\n }\n value = parsers.entity();\n if (value) {\n parserInput.forget();\n return new(tree.Assignment)(key, value);\n } else {\n parserInput.restore();\n }\n },\n\n //\n // Parse url() tokens\n //\n // We use a specific rule for urls, because they don't really behave like\n // standard function calls. The difference is that the argument doesn't have\n // to be enclosed within a string, so it can't be parsed as an Expression.\n //\n url: function () {\n let value;\n const index = parserInput.i;\n\n parserInput.autoCommentAbsorb = false;\n\n if (!parserInput.$str('url(')) {\n parserInput.autoCommentAbsorb = true;\n return;\n }\n\n value = this.quoted() || this.variable() || this.property() ||\n parserInput.$re(/^(?:(?:\\\\[\\(\\)'\"])|[^\\(\\)'\"])+/) || '';\n\n parserInput.autoCommentAbsorb = true;\n\n expectChar(')');\n\n return new(tree.URL)((value.value != null || \n value instanceof tree.Variable || \n value instanceof tree.Property) ?\n value : new(tree.Anonymous)(value, index), index, fileInfo);\n },\n\n //\n // A Variable entity, such as `@fink`, in\n //\n // width: @fink + 2px\n //\n // We use a different parser for variable definitions,\n // see `parsers.variable`.\n //\n variable: function () {\n let ch;\n let name;\n const index = parserInput.i;\n\n parserInput.save();\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\\w-]+/))) {\n ch = parserInput.currentChar();\n if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\\s/)) {\n // this may be a VariableCall lookup\n const result = parsers.variableCall(name);\n if (result) {\n parserInput.forget();\n return result;\n }\n }\n parserInput.forget();\n return new(tree.Variable)(name, index, fileInfo);\n }\n parserInput.restore();\n },\n\n // A variable entity using the protective {} e.g. @{var}\n variableCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\\{([\\w-]+)\\}/))) {\n return new(tree.Variable)(`@${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Property accessor, such as `$color`, in\n //\n // background-color: $color\n //\n property: function () {\n let name;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\\$[\\w-]+/))) {\n return new(tree.Property)(name, index, fileInfo);\n }\n },\n\n // A property entity useing the protective {} e.g. ${prop}\n propertyCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\\$\\{([\\w-]+)\\}/))) {\n return new(tree.Property)(`$${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Hexadecimal color\n //\n // #4F3C2F\n //\n // `rgb` and `hsl` colors are parsed through the `entities.call` parser.\n //\n color: function () {\n let rgb;\n parserInput.save();\n\n if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\\w.#\\[])?/))) {\n if (!rgb[2]) {\n parserInput.forget();\n return new(tree.Color)(rgb[1], undefined, rgb[0]);\n } \n }\n parserInput.restore();\n },\n\n colorKeyword: function () {\n parserInput.save();\n const autoCommentAbsorb = parserInput.autoCommentAbsorb;\n parserInput.autoCommentAbsorb = false;\n const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/);\n parserInput.autoCommentAbsorb = autoCommentAbsorb;\n if (!k) {\n parserInput.forget();\n return;\n }\n parserInput.restore();\n const color = tree.Color.fromKeyword(k);\n if (color) {\n parserInput.$str(k);\n return color;\n }\n },\n\n //\n // A Dimension, that is, a number and a unit\n //\n // 0.5em 95%\n //\n dimension: function () {\n if (parserInput.peekNotNumeric()) {\n return;\n }\n\n const value = parserInput.$re(/^([+-]?\\d*\\.?\\d+)(%|[a-z_]+)?/i);\n if (value) {\n return new(tree.Dimension)(value[1], value[2]);\n }\n },\n\n //\n // A unicode descriptor, as is used in unicode-range\n //\n // U+0?? or U+00A1-00A9\n //\n unicodeDescriptor: function () {\n let ud;\n\n ud = parserInput.$re(/^U\\+[0-9a-fA-F?]+(\\-[0-9a-fA-F?]+)?/);\n if (ud) {\n return new(tree.UnicodeDescriptor)(ud[0]);\n }\n },\n\n //\n // JavaScript code to be evaluated\n //\n // `window.location.href`\n //\n javascript: function () {\n let js;\n const index = parserInput.i;\n\n parserInput.save();\n\n const escape = parserInput.$char('~');\n const jsQuote = parserInput.$char('`');\n\n if (!jsQuote) {\n parserInput.restore();\n return;\n }\n\n js = parserInput.$re(/^[^`]*`/);\n if (js) {\n parserInput.forget();\n return new(tree.JavaScript)(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo);\n }\n parserInput.restore('invalid javascript definition');\n }\n },\n\n //\n // The variable part of a variable definition. Used in the `rule` parser\n //\n // @fink:\n //\n variable: function () {\n let name;\n\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\\w-]+)\\s*:/))) { return name[1]; }\n },\n\n //\n // Call a variable value to retrieve a detached ruleset\n // or a value from a detached ruleset's rules.\n //\n // @fink();\n // @fink;\n // color: @fink[@color];\n //\n variableCall: function (parsedName) {\n let lookups;\n let important;\n const i = parserInput.i;\n const inValue = !!parsedName;\n let name = parsedName;\n\n parserInput.save();\n\n if (name || (parserInput.currentChar() === '@'\n && (name = parserInput.$re(/^(@[\\w-]+)(\\(\\s*\\))?/)))) {\n\n lookups = this.mixin.ruleLookups();\n\n if (!lookups && ((inValue && parserInput.$str('()') !== '()') || (name[2] !== '()'))) {\n parserInput.restore('Missing \\'[...]\\' lookup in variable call');\n return;\n }\n\n if (!inValue) {\n name = name[1];\n }\n\n if (lookups && parsers.important()) {\n important = true;\n }\n\n const call = new tree.VariableCall(name, i, fileInfo);\n if (!inValue && parsers.end()) {\n parserInput.forget();\n return call;\n }\n else {\n parserInput.forget();\n return new tree.NamespaceValue(call, lookups, important, i, fileInfo);\n }\n }\n\n parserInput.restore();\n },\n\n //\n // extend syntax - used to extend selectors\n //\n extend: function(isRule) {\n let elements;\n let e;\n const index = parserInput.i;\n let option;\n let extendList;\n let extend;\n\n if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) {\n return;\n }\n\n do {\n option = null;\n elements = null;\n while (!(option = parserInput.$re(/^(all)(?=\\s*(\\)|,))/))) {\n e = this.element();\n if (!e) {\n break;\n }\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n }\n\n option = option && option[1];\n if (!elements) {\n error('Missing target selector for :extend().');\n }\n extend = new(tree.Extend)(new(tree.Selector)(elements), option, index, fileInfo);\n if (extendList) {\n extendList.push(extend);\n } else {\n extendList = [ extend ];\n }\n } while (parserInput.$char(','));\n\n expect(/^\\)/);\n\n if (isRule) {\n expect(/^;/);\n }\n\n return extendList;\n },\n\n //\n // extendRule - used in a rule to extend all the parent selectors\n //\n extendRule: function() {\n return this.extend(true);\n },\n\n //\n // Mixins\n //\n mixin: {\n //\n // A Mixin call, with an optional argument list\n //\n // #mixins > .square(#fff);\n // #mixins.square(#fff);\n // .rounded(4px, black);\n // .button;\n //\n // We can lookup / return a value using the lookup syntax:\n //\n // color: #mixin.square(#fff)[@color];\n //\n // The `while` loop is there because mixins can be\n // namespaced, but we only support the child and descendant\n // selector for now.\n //\n call: function (inValue, getLookup) {\n const s = parserInput.currentChar();\n let important = false;\n let lookups;\n const index = parserInput.i;\n let elements;\n let args;\n let hasParens;\n\n if (s !== '.' && s !== '#') { return; }\n\n parserInput.save(); // stop us absorbing part of an invalid selector\n\n elements = this.elements();\n\n if (elements) {\n if (parserInput.$char('(')) {\n args = this.args(true).args;\n expectChar(')');\n hasParens = true;\n }\n\n if (getLookup !== false) {\n lookups = this.ruleLookups();\n }\n if (getLookup === true && !lookups) {\n parserInput.restore();\n return;\n }\n\n if (inValue && !lookups && !hasParens) {\n // This isn't a valid in-value mixin call\n parserInput.restore();\n return;\n }\n\n if (!inValue && parsers.important()) {\n important = true;\n }\n\n if (inValue || parsers.end()) {\n parserInput.forget();\n const mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important);\n if (lookups) {\n return new tree.NamespaceValue(mixin, lookups, important);\n }\n else {\n return mixin;\n }\n }\n }\n\n parserInput.restore();\n },\n /**\n * Matching elements for mixins\n * (Start with . or # and can have > )\n */\n elements: function() {\n let elements;\n let e;\n let c;\n let elem;\n let elemIndex;\n const re = /^[#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/;\n while (true) {\n elemIndex = parserInput.i;\n e = parserInput.$re(re);\n \n if (!e) {\n break;\n }\n elem = new(tree.Element)(c, e, false, elemIndex, fileInfo);\n if (elements) {\n elements.push(elem);\n } else {\n elements = [ elem ];\n }\n c = parserInput.$char('>');\n }\n return elements;\n },\n args: function (isCall) {\n const entities = parsers.entities;\n const returner = { args:null, variadic: false };\n let expressions = [];\n const argsSemiColon = [];\n const argsComma = [];\n let isSemiColonSeparated;\n let expressionContainsNamed;\n let name;\n let nameLoop;\n let value;\n let arg;\n let expand;\n let hasSep = true;\n\n parserInput.save();\n\n while (true) {\n if (isCall) {\n arg = parsers.detachedRuleset() || parsers.expression();\n } else {\n parserInput.commentStore.length = 0;\n if (parserInput.$str('...')) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ variadic: true });\n break;\n }\n arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true);\n }\n\n if (!arg || !hasSep) {\n break;\n }\n\n nameLoop = null;\n if (arg.throwAwayComments) {\n arg.throwAwayComments();\n }\n value = arg;\n let val = null;\n\n if (isCall) {\n // Variable\n if (arg.value && arg.value.length == 1) {\n val = arg.value[0];\n }\n } else {\n val = arg;\n }\n\n if (val && (val instanceof tree.Variable || val instanceof tree.Property)) {\n if (parserInput.$char(':')) {\n if (expressions.length > 0) {\n if (isSemiColonSeparated) {\n error('Cannot mix ; and , as delimiter types');\n }\n expressionContainsNamed = true;\n }\n\n value = parsers.detachedRuleset() || parsers.expression();\n\n if (!value) {\n if (isCall) {\n error('could not understand value for named argument');\n } else {\n parserInput.restore();\n returner.args = [];\n return returner;\n }\n }\n nameLoop = (name = val.name);\n } else if (parserInput.$str('...')) {\n if (!isCall) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ name: arg.name, variadic: true });\n break;\n } else {\n expand = true;\n }\n } else if (!isCall) {\n name = nameLoop = val.name;\n value = null;\n }\n }\n\n if (value) {\n expressions.push(value);\n }\n\n argsComma.push({ name:nameLoop, value, expand });\n\n if (parserInput.$char(',')) {\n hasSep = true;\n continue;\n }\n hasSep = parserInput.$char(';') === ';';\n\n if (hasSep || isSemiColonSeparated) {\n\n if (expressionContainsNamed) {\n error('Cannot mix ; and , as delimiter types');\n }\n\n isSemiColonSeparated = true;\n\n if (expressions.length > 1) {\n value = new(tree.Value)(expressions);\n }\n argsSemiColon.push({ name, value, expand });\n\n name = null;\n expressions = [];\n expressionContainsNamed = false;\n }\n }\n\n parserInput.forget();\n returner.args = isSemiColonSeparated ? argsSemiColon : argsComma;\n return returner;\n },\n //\n // A Mixin definition, with a list of parameters\n //\n // .rounded (@radius: 2px, @color) {\n // ...\n // }\n //\n // Until we have a finer grained state-machine, we have to\n // do a look-ahead, to make sure we don't have a mixin call.\n // See the `rule` function for more information.\n //\n // We start by matching `.rounded (`, and then proceed on to\n // the argument list, which has optional default values.\n // We store the parameters in `params`, with a `value` key,\n // if there is a value, such as in the case of `@radius`.\n //\n // Once we've got our params list, and a closing `)`, we parse\n // the `{...}` block.\n //\n definition: function () {\n let name;\n let params = [];\n let match;\n let ruleset;\n let cond;\n let variadic = false;\n if ((parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#') ||\n parserInput.peek(/^[^{]*\\}/)) {\n return;\n }\n\n parserInput.save();\n\n match = parserInput.$re(/^([#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\\s*\\(/);\n if (match) {\n name = match[1];\n\n const argInfo = this.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n\n // .mixincall(\"@{a}\");\n // looks a bit like a mixin definition..\n // also\n // .mixincall(@a: {rule: set;});\n // so we have to be nice and restore\n if (!parserInput.$char(')')) {\n parserInput.restore('Missing closing \\')\\'');\n return;\n }\n\n parserInput.commentStore.length = 0;\n\n if (parserInput.$str('when')) { // Guard\n cond = expect(parsers.conditions, 'expected condition');\n }\n\n ruleset = parsers.block();\n\n if (ruleset) {\n parserInput.forget();\n return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);\n } else {\n parserInput.restore();\n }\n } else {\n parserInput.forget();\n }\n },\n \n ruleLookups: function() {\n let rule;\n let args;\n const lookups = [];\n\n if (parserInput.currentChar() !== '[') { \n return;\n }\n\n while (true) {\n parserInput.save();\n args = null;\n rule = this.lookupValue();\n if (!rule && rule !== '') {\n parserInput.restore();\n break;\n }\n lookups.push(rule);\n parserInput.forget();\n }\n if (lookups.length > 0) {\n return lookups;\n }\n },\n \n lookupValue: function() {\n parserInput.save();\n \n if (!parserInput.$char('[')) { \n parserInput.restore();\n return;\n }\n \n const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/);\n \n if (!parserInput.$char(']')) {\n parserInput.restore();\n return;\n } \n\n if (name || name === '') {\n parserInput.forget();\n return name;\n }\n \n parserInput.restore();\n }\n },\n //\n // Entities are the smallest recognized token,\n // and can be found inside a rule's value.\n //\n entity: function () {\n const entities = this.entities;\n\n return this.comment() || entities.literal() || entities.variable() || entities.url() ||\n entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) ||\n entities.javascript();\n },\n\n //\n // A Declaration terminator. Note that we use `peek()` to check for '}',\n // because the `block` rule will be expecting it, but we still need to make sure\n // it's there, if ';' was omitted.\n //\n end: function () {\n return parserInput.$char(';') || parserInput.peek('}');\n },\n\n //\n // IE's alpha function\n //\n // alpha(opacity=88)\n //\n ieAlpha: function () {\n let value;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (!parserInput.$re(/^opacity=/i)) { return; }\n value = parserInput.$re(/^\\d+/);\n if (!value) {\n value = expect(parsers.entities.variable, 'Could not parse alpha');\n value = `@{${value.name.slice(1)}}`;\n }\n expectChar(')');\n return new tree.Quoted('', `alpha(opacity=${value})`);\n },\n\n //\n // A Selector Element\n //\n // div\n // + h1\n // #socks\n // input[type=\"text\"]\n //\n // Elements are the building blocks for Selectors,\n // they are made out of a `Combinator` (see combinator rule),\n // and an element name, such as a tag a class, or `*`.\n //\n element: function () {\n let e;\n let c;\n let v;\n const index = parserInput.i;\n\n c = this.combinator();\n\n e = parserInput.$re(/^(?:\\d+\\.\\d+|\\d+)%/) ||\n parserInput.$re(/^(?:[.#]?|:*)(?:[\\w-]|[^\\x00-\\x9f]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||\n parserInput.$char('*') || parserInput.$char('&') || this.attribute() ||\n parserInput.$re(/^\\([^&()@]+\\)/) || parserInput.$re(/^[\\.#:](?=@)/) ||\n this.entities.variableCurly();\n\n if (!e) {\n parserInput.save();\n if (parserInput.$char('(')) {\n if ((v = this.selector(false)) && parserInput.$char(')')) {\n e = new(tree.Paren)(v);\n parserInput.forget();\n } else {\n parserInput.restore('Missing closing \\')\\'');\n }\n } else {\n parserInput.forget();\n }\n }\n\n if (e) { return new(tree.Element)(c, e, e instanceof tree.Variable, index, fileInfo); }\n },\n\n //\n // Combinators combine elements together, in a Selector.\n //\n // Because our parser isn't white-space sensitive, special care\n // has to be taken, when parsing the descendant combinator, ` `,\n // as it's an empty space. We have to check the previous character\n // in the input, to see if it's a ` ` character. More info on how\n // we deal with this in *combinator.js*.\n //\n combinator: function () {\n let c = parserInput.currentChar();\n\n if (c === '/') {\n parserInput.save();\n const slashedCombinator = parserInput.$re(/^\\/[a-z]+\\//i);\n if (slashedCombinator) {\n parserInput.forget();\n return new(tree.Combinator)(slashedCombinator);\n }\n parserInput.restore();\n }\n\n if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') {\n parserInput.i++;\n if (c === '^' && parserInput.currentChar() === '^') {\n c = '^^';\n parserInput.i++;\n }\n while (parserInput.isWhitespace()) { parserInput.i++; }\n return new(tree.Combinator)(c);\n } else if (parserInput.isWhitespace(-1)) {\n return new(tree.Combinator)(' ');\n } else {\n return new(tree.Combinator)(null);\n }\n },\n //\n // A CSS Selector\n // with less extensions e.g. the ability to extend and guard\n //\n // .class > div + h1\n // li a:hover\n //\n // Selectors are made out of one or more Elements, see above.\n //\n selector: function (isLess) {\n const index = parserInput.i;\n let elements;\n let extendList;\n let c;\n let e;\n let allExtends;\n let when;\n let condition;\n isLess = isLess !== false;\n while ((isLess && (extendList = this.extend())) || (isLess && (when = parserInput.$str('when'))) || (e = this.element())) {\n if (when) {\n condition = expect(this.conditions, 'expected condition');\n } else if (condition) {\n error('CSS guard can only be used at the end of selector');\n } else if (extendList) {\n if (allExtends) {\n allExtends = allExtends.concat(extendList);\n } else {\n allExtends = extendList;\n }\n } else {\n if (allExtends) { error('Extend can only be used at the end of selector'); }\n c = parserInput.currentChar();\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n e = null;\n }\n if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') {\n break;\n }\n }\n\n if (elements) { return new(tree.Selector)(elements, allExtends, condition, index, fileInfo); }\n if (allExtends) { error('Extend must be used to extend a selector, it cannot be used on its own'); }\n },\n selectors: function () {\n let s;\n let selectors;\n while (true) {\n s = this.selector();\n if (!s) {\n break;\n }\n if (selectors) {\n selectors.push(s);\n } else {\n selectors = [ s ];\n }\n parserInput.commentStore.length = 0;\n if (s.condition && selectors.length > 1) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n if (!parserInput.$char(',')) { break; }\n if (s.condition) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n parserInput.commentStore.length = 0;\n }\n return selectors;\n },\n attribute: function () {\n if (!parserInput.$char('[')) { return; }\n\n const entities = this.entities;\n let key;\n let val;\n let op;\n\n if (!(key = entities.variableCurly())) {\n key = expect(/^(?:[_A-Za-z0-9-\\*]*\\|)?(?:[_A-Za-z0-9-]|\\\\.)+/);\n }\n\n op = parserInput.$re(/^[|~*$^]?=/);\n if (op) {\n val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\\w-]+/) || entities.variableCurly();\n }\n\n expectChar(']');\n\n return new(tree.Attribute)(key, op, val);\n },\n\n //\n // The `block` rule is used by `ruleset` and `mixin.definition`.\n // It's a wrapper around the `primary` rule, with added `{}`.\n //\n block: function () {\n let content;\n if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) {\n return content;\n }\n },\n\n blockRuleset: function() {\n let block = this.block();\n\n if (block) {\n block = new tree.Ruleset(null, block);\n }\n return block;\n },\n\n detachedRuleset: function() {\n let argInfo;\n let params;\n let variadic;\n\n parserInput.save();\n if (parserInput.$re(/^[.#]\\(/)) {\n /**\n * DR args currently only implemented for each() function, and not \n * yet settable as `@dr: #(@arg) {}`\n * This should be done when DRs are merged with mixins.\n * See: https://github.com/less/less-meta/issues/16\n */\n argInfo = this.mixin.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return;\n }\n }\n const blockRuleset = this.blockRuleset();\n if (blockRuleset) {\n parserInput.forget();\n if (params) {\n return new tree.mixin.Definition(null, params, blockRuleset, null, variadic);\n }\n return new tree.DetachedRuleset(blockRuleset);\n }\n parserInput.restore();\n },\n\n //\n // div, .class, body > p {...}\n //\n ruleset: function () {\n let selectors;\n let rules;\n let debugInfo;\n\n parserInput.save();\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(parserInput.i);\n }\n\n selectors = this.selectors();\n\n if (selectors && (rules = this.block())) {\n parserInput.forget();\n const ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports);\n if (context.dumpLineNumbers) {\n ruleset.debugInfo = debugInfo;\n }\n return ruleset;\n } else {\n parserInput.restore();\n }\n },\n declaration: function () {\n let name;\n let value;\n const index = parserInput.i;\n let hasDR;\n const c = parserInput.currentChar();\n let important;\n let merge;\n let isVariable;\n\n if (c === '.' || c === '#' || c === '&' || c === ':') { return; }\n\n parserInput.save();\n\n name = this.variable() || this.ruleProperty();\n if (name) {\n isVariable = typeof name === 'string';\n\n if (isVariable) {\n value = this.detachedRuleset();\n if (value) {\n hasDR = true;\n }\n }\n\n parserInput.commentStore.length = 0;\n if (!value) {\n // a name returned by this.ruleProperty() is always an array of the form:\n // [string-1, ..., string-n, \"\"] or [string-1, ..., string-n, \"+\"]\n // where each item is a tree.Keyword or tree.Variable\n merge = !isVariable && name.length > 1 && name.pop().value;\n\n // Custom property values get permissive parsing\n if (name[0].value && name[0].value.slice(0, 2) === '--') {\n value = this.permissiveValue();\n }\n // Try to store values as anonymous\n // If we need the value later we'll re-parse it in ruleset.parseValue\n else {\n value = this.anonymousValue();\n }\n if (value) {\n parserInput.forget();\n // anonymous values absorb the end ';' which is required for them to work\n return new (tree.Declaration)(name, value, false, merge, index, fileInfo);\n }\n\n if (!value) {\n value = this.value();\n }\n\n if (value) {\n important = this.important();\n } else if (isVariable) {\n // As a last resort, try permissiveValue\n value = this.permissiveValue();\n }\n }\n\n if (value && (this.end() || hasDR)) {\n parserInput.forget();\n return new (tree.Declaration)(name, value, important, merge, index, fileInfo);\n }\n else {\n parserInput.restore();\n }\n } else {\n parserInput.restore();\n }\n },\n anonymousValue: function () {\n const index = parserInput.i;\n const match = parserInput.$re(/^([^.#@\\$+\\/'\"*`(;{}-]*);/);\n if (match) {\n return new(tree.Anonymous)(match[1], index);\n }\n },\n /**\n * Used for custom properties, at-rules, and variables (as fallback)\n * Parses almost anything inside of {} [] () \"\" blocks\n * until it reaches outer-most tokens.\n * \n * First, it will try to parse comments and entities to reach\n * the end. This is mostly like the Expression parser except no\n * math is allowed.\n */\n permissiveValue: function (untilTokens) {\n let i;\n let e;\n let done;\n let value;\n const tok = untilTokens || ';';\n const index = parserInput.i;\n const result = [];\n\n function testCurrentChar() {\n const char = parserInput.currentChar();\n if (typeof tok === 'string') {\n return char === tok;\n } else {\n return tok.test(char);\n }\n }\n if (testCurrentChar()) {\n return;\n }\n value = [];\n do {\n e = this.comment();\n if (e) {\n value.push(e);\n continue;\n }\n e = this.entity();\n if (e) {\n value.push(e);\n }\n } while (e);\n\n done = testCurrentChar();\n\n if (value.length > 0) {\n value = new(tree.Expression)(value);\n if (done) {\n return value;\n }\n else {\n result.push(value);\n }\n // Preserve space before $parseUntil as it will not\n if (parserInput.prevChar() === ' ') {\n result.push(new tree.Anonymous(' ', index));\n }\n }\n parserInput.save();\n\n value = parserInput.$parseUntil(tok);\n\n if (value) {\n if (typeof value === 'string') {\n error(`Expected '${value}'`, 'Parse');\n }\n if (value.length === 1 && value[0] === ' ') {\n parserInput.forget();\n return new tree.Anonymous('', index);\n }\n let item;\n for (i = 0; i < value.length; i++) {\n item = value[i];\n if (Array.isArray(item)) {\n // Treat actual quotes as normal quoted values\n result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo));\n }\n else {\n if (i === value.length - 1) {\n item = item.trim();\n }\n // Treat like quoted values, but replace vars like unquoted expressions\n const quote = new tree.Quoted('\\'', item, true, index, fileInfo);\n quote.variableRegex = /@([\\w-]+)/g;\n quote.propRegex = /\\$([\\w-]+)/g;\n result.push(quote);\n }\n }\n parserInput.forget();\n return new tree.Expression(result, true);\n }\n parserInput.restore();\n },\n\n //\n // An @import atrule\n //\n // @import \"lib\";\n //\n // Depending on our environment, importing is done differently:\n // In the browser, it's an XHR request, in Node, it would be a\n // file-system operation. The function used for importing is\n // stored in `import`, which we pass to the Import constructor.\n //\n 'import': function () {\n let path;\n let features;\n const index = parserInput.i;\n\n const dir = parserInput.$re(/^@import?\\s+/);\n\n if (dir) {\n const options = (dir ? this.importOptions() : null) || {};\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n features = this.mediaFeatures();\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon or unrecognised media features on import');\n }\n features = features && new(tree.Value)(features);\n return new(tree.Import)(path, features, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed import statement');\n }\n }\n },\n\n importOptions: function() {\n let o;\n const options = {};\n let optionName;\n let value;\n\n // list of options, surrounded by parens\n if (!parserInput.$char('(')) { return null; }\n do {\n o = this.importOption();\n if (o) {\n optionName = o;\n value = true;\n switch (optionName) {\n case 'css':\n optionName = 'less';\n value = false;\n break;\n case 'once':\n optionName = 'multiple';\n value = false;\n break;\n }\n options[optionName] = value;\n if (!parserInput.$char(',')) { break; }\n }\n } while (o);\n expectChar(')');\n return options;\n },\n\n importOption: function() {\n const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/);\n if (opt) {\n return opt[1];\n }\n },\n\n mediaFeature: function () {\n const entities = this.entities;\n const nodes = [];\n let e;\n let p;\n parserInput.save();\n do {\n e = entities.keyword() || entities.variable() || entities.mixinLookup();\n if (e) {\n nodes.push(e);\n } else if (parserInput.$char('(')) {\n p = this.property();\n e = this.value();\n if (parserInput.$char(')')) {\n if (p && e) {\n nodes.push(new(tree.Paren)(new(tree.Declaration)(p, e, null, null, parserInput.i, fileInfo, true)));\n } else if (e) {\n nodes.push(new(tree.Paren)(e));\n } else {\n error('badly formed media feature definition');\n }\n } else {\n error('Missing closing \\')\\'', 'Parse');\n }\n }\n } while (e);\n\n parserInput.forget();\n if (nodes.length > 0) {\n return new(tree.Expression)(nodes);\n }\n },\n\n mediaFeatures: function () {\n const entities = this.entities;\n const features = [];\n let e;\n do {\n e = this.mediaFeature();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n } else {\n e = entities.variable() || entities.mixinLookup();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n }\n } while (e);\n\n return features.length > 0 ? features : null;\n },\n\n media: function () {\n let features;\n let rules;\n let media;\n let debugInfo;\n const index = parserInput.i;\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(index);\n }\n\n parserInput.save();\n\n if (parserInput.$str('@media')) {\n features = this.mediaFeatures();\n\n rules = this.block();\n\n if (!rules) {\n error('media definitions require block statements after any features');\n }\n\n parserInput.forget();\n\n media = new(tree.Media)(rules, features, index, fileInfo);\n if (context.dumpLineNumbers) {\n media.debugInfo = debugInfo;\n }\n\n return media;\n }\n\n parserInput.restore();\n },\n\n //\n\n // A @plugin directive, used to import plugins dynamically.\n //\n // @plugin (args) \"lib\";\n //\n plugin: function () {\n let path;\n let args;\n let options;\n const index = parserInput.i;\n const dir = parserInput.$re(/^@plugin?\\s+/);\n\n if (dir) {\n args = this.pluginArgs();\n\n if (args) {\n options = {\n pluginArgs: args,\n isPlugin: true\n };\n }\n else {\n options = { isPlugin: true };\n }\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon on @plugin');\n }\n return new(tree.Import)(path, null, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed @plugin statement');\n }\n }\n },\n\n pluginArgs: function() {\n // list of options, surrounded by parens\n parserInput.save();\n if (!parserInput.$char('(')) {\n parserInput.restore();\n return null;\n }\n const args = parserInput.$re(/^\\s*([^\\);]+)\\)\\s*/);\n if (args[1]) {\n parserInput.forget();\n return args[1].trim();\n }\n else { \n parserInput.restore();\n return null;\n }\n },\n\n //\n // A CSS AtRule\n //\n // @charset \"utf-8\";\n //\n atrule: function () {\n const index = parserInput.i;\n let name;\n let value;\n let rules;\n let nonVendorSpecificName;\n let hasIdentifier;\n let hasExpression;\n let hasUnknown;\n let hasBlock = true;\n let isRooted = true;\n\n if (parserInput.currentChar() !== '@') { return; }\n\n value = this['import']() || this.plugin() || this.media();\n if (value) {\n return value;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^@[a-z-]+/);\n\n if (!name) { return; }\n\n nonVendorSpecificName = name;\n if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {\n nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`;\n }\n\n switch (nonVendorSpecificName) {\n case '@charset':\n hasIdentifier = true;\n hasBlock = false;\n break;\n case '@namespace':\n hasExpression = true;\n hasBlock = false;\n break;\n case '@keyframes':\n case '@counter-style':\n hasIdentifier = true;\n break;\n case '@document':\n case '@supports':\n hasUnknown = true;\n isRooted = false;\n break;\n default:\n hasUnknown = true;\n break;\n }\n\n parserInput.commentStore.length = 0;\n\n if (hasIdentifier) {\n value = this.entity();\n if (!value) {\n error(`expected ${name} identifier`);\n }\n } else if (hasExpression) {\n value = this.expression();\n if (!value) {\n error(`expected ${name} expression`);\n }\n } else if (hasUnknown) {\n value = this.permissiveValue(/^[{;]/);\n hasBlock = (parserInput.currentChar() === '{');\n if (!value) {\n if (!hasBlock && parserInput.currentChar() !== ';') {\n error(`${name} rule is missing block or ending semi-colon`);\n }\n }\n else if (!value.value) {\n value = null;\n }\n }\n\n if (hasBlock) {\n rules = this.blockRuleset();\n }\n\n if (rules || (!hasBlock && value && parserInput.$char(';'))) {\n parserInput.forget();\n return new (tree.AtRule)(name, value, rules, index, fileInfo,\n context.dumpLineNumbers ? getDebugInfo(index) : null,\n isRooted\n );\n }\n\n parserInput.restore('at-rule options not recognised');\n },\n\n //\n // A Value is a comma-delimited list of Expressions\n //\n // font-family: Baskerville, Georgia, serif;\n //\n // In a Rule, a Value represents everything after the `:`,\n // and before the `;`.\n //\n value: function () {\n let e;\n const expressions = [];\n const index = parserInput.i;\n\n do {\n e = this.expression();\n if (e) {\n expressions.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n } while (e);\n\n if (expressions.length > 0) {\n return new(tree.Value)(expressions, index);\n }\n },\n important: function () {\n if (parserInput.currentChar() === '!') {\n return parserInput.$re(/^! *important/);\n }\n },\n sub: function () {\n let a;\n let e;\n\n parserInput.save();\n if (parserInput.$char('(')) {\n a = this.addition();\n if (a && parserInput.$char(')')) {\n parserInput.forget();\n e = new(tree.Expression)([a]);\n e.parens = true;\n return e;\n }\n parserInput.restore('Expected \\')\\'');\n return;\n }\n parserInput.restore();\n },\n multiplication: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.operand();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n if (parserInput.peek(/^\\/[*\\/]/)) {\n break;\n }\n\n parserInput.save();\n\n op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./');\n\n if (!op) { parserInput.forget(); break; }\n\n a = this.operand();\n\n if (!a) { parserInput.restore(); break; }\n parserInput.forget();\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n addition: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.multiplication();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n op = parserInput.$re(/^[-+]\\s+/) || (!isSpaced && (parserInput.$char('+') || parserInput.$char('-')));\n if (!op) {\n break;\n }\n a = this.multiplication();\n if (!a) {\n break;\n }\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n conditions: function () {\n let a;\n let b;\n const index = parserInput.i;\n let condition;\n\n a = this.condition(true);\n if (a) {\n while (true) {\n if (!parserInput.peek(/^,\\s*(not\\s*)?\\(/) || !parserInput.$char(',')) {\n break;\n }\n b = this.condition(true);\n if (!b) {\n break;\n }\n condition = new(tree.Condition)('or', condition || a, b, index);\n }\n return condition || a;\n }\n },\n condition: function (needsParens) {\n let result;\n let logical;\n let next;\n function or() {\n return parserInput.$str('or');\n }\n\n result = this.conditionAnd(needsParens);\n if (!result) {\n return ;\n }\n logical = or();\n if (logical) {\n next = this.condition(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n conditionAnd: function (needsParens) {\n let result;\n let logical;\n let next;\n const self = this;\n function insideCondition() {\n const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens);\n if (!cond && !needsParens) {\n return self.atomicCondition(needsParens);\n }\n return cond;\n }\n function and() {\n return parserInput.$str('and');\n }\n\n result = insideCondition();\n if (!result) {\n return ;\n }\n logical = and();\n if (logical) {\n next = this.conditionAnd(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n negatedCondition: function (needsParens) {\n if (parserInput.$str('not')) {\n const result = this.parenthesisCondition(needsParens);\n if (result) {\n result.negate = !result.negate;\n }\n return result;\n }\n },\n parenthesisCondition: function (needsParens) {\n function tryConditionFollowedByParenthesis(me) {\n let body;\n parserInput.save();\n body = me.condition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return ;\n }\n parserInput.forget();\n return body;\n }\n\n let body;\n parserInput.save();\n if (!parserInput.$str('(')) {\n parserInput.restore();\n return ;\n }\n body = tryConditionFollowedByParenthesis(this);\n if (body) {\n parserInput.forget();\n return body;\n }\n\n body = this.atomicCondition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`);\n return ;\n }\n parserInput.forget();\n return body;\n },\n atomicCondition: function (needsParens) {\n const entities = this.entities;\n const index = parserInput.i;\n let a;\n let b;\n let c;\n let op;\n\n function cond() {\n return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup();\n }\n cond = cond.bind(this);\n\n a = cond();\n if (a) {\n if (parserInput.$char('>')) {\n if (parserInput.$char('=')) {\n op = '>=';\n } else {\n op = '>';\n }\n } else\n if (parserInput.$char('<')) {\n if (parserInput.$char('=')) {\n op = '<=';\n } else {\n op = '<';\n }\n } else\n if (parserInput.$char('=')) {\n if (parserInput.$char('>')) {\n op = '=>';\n } else if (parserInput.$char('<')) {\n op = '=<';\n } else {\n op = '=';\n }\n }\n if (op) {\n b = cond();\n if (b) {\n c = new(tree.Condition)(op, a, b, index, false);\n } else {\n error('expected expression');\n }\n } else {\n c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, false);\n }\n return c;\n }\n },\n\n //\n // An operand is anything that can be part of an operation,\n // such as a Color, or a Variable\n //\n operand: function () {\n const entities = this.entities;\n let negate;\n\n if (parserInput.peek(/^-[@\\$\\(]/)) {\n negate = parserInput.$char('-');\n }\n\n let o = this.sub() || entities.dimension() ||\n entities.color() || entities.variable() ||\n entities.property() || entities.call() ||\n entities.quoted(true) || entities.colorKeyword() ||\n entities.mixinLookup();\n\n if (negate) {\n o.parensInOp = true;\n o = new(tree.Negative)(o);\n }\n\n return o;\n },\n\n //\n // Expressions either represent mathematical operations,\n // or white-space delimited Entities.\n //\n // 1px solid black\n // @var * 2\n //\n expression: function () {\n const entities = [];\n let e;\n let delim;\n const index = parserInput.i;\n\n do {\n e = this.comment();\n if (e) {\n entities.push(e);\n continue;\n }\n e = this.addition() || this.entity();\n if (e) {\n entities.push(e);\n // operations do not allow keyword \"/\" dimension (e.g. small/20px) so we support that here\n if (!parserInput.peek(/^\\/[\\/*]/)) {\n delim = parserInput.$char('/');\n if (delim) {\n entities.push(new(tree.Anonymous)(delim, index));\n }\n }\n }\n } while (e);\n if (entities.length > 0) {\n return new(tree.Expression)(entities);\n }\n },\n property: function () {\n const name = parserInput.$re(/^(\\*?-?[_a-zA-Z0-9-]+)\\s*:/);\n if (name) {\n return name[1];\n }\n },\n ruleProperty: function () {\n let name = [];\n const index = [];\n let s;\n let k;\n\n parserInput.save();\n\n const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\\s*:/);\n if (simpleProperty) {\n name = [new(tree.Keyword)(simpleProperty[1])];\n parserInput.forget();\n return name;\n }\n\n function match(re) {\n const i = parserInput.i;\n const chunk = parserInput.$re(re);\n if (chunk) {\n index.push(i);\n return name.push(chunk[1]);\n }\n }\n\n match(/^(\\*?)/);\n while (true) {\n if (!match(/^((?:[\\w-]+)|(?:[@\\$]\\{[\\w-]+\\}))/)) {\n break;\n }\n }\n\n if ((name.length > 1) && match(/^((?:\\+_|\\+)?)\\s*:/)) {\n parserInput.forget();\n\n // at last, we have the complete match now. move forward,\n // convert name particles to tree objects and return:\n if (name[0] === '') {\n name.shift();\n index.shift();\n }\n for (k = 0; k < name.length; k++) {\n s = name[k];\n name[k] = (s.charAt(0) !== '@' && s.charAt(0) !== '$') ?\n new(tree.Keyword)(s) :\n (s.charAt(0) === '@' ?\n new(tree.Variable)(`@${s.slice(2, -1)}`, index[k], fileInfo) :\n new(tree.Property)(`$${s.slice(2, -1)}`, index[k], fileInfo));\n }\n return name;\n }\n parserInput.restore();\n }\n }\n };\n};\nParser.serializeVars = vars => {\n let s = '';\n\n for (const name in vars) {\n if (Object.hasOwnProperty.call(vars, name)) {\n const value = vars[name];\n s += `${((name[0] === '@') ? '' : '@') + name}: ${value}${(String(value).slice(-1) === ';') ? '' : ';'}`;\n }\n }\n\n return s;\n};\n\nexport default Parser;\n","import Anonymous from '../tree/anonymous';\nimport Keyword from '../tree/keyword';\n\nfunction boolean(condition) {\n return condition ? Keyword.True : Keyword.False;\n}\n\nfunction If(condition, trueValue, falseValue) {\n return condition ? trueValue\n : (falseValue || new Anonymous);\n}\n\nexport default { boolean, 'if': If };\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nlet colorFunctions;\n\nfunction clamp(val) {\n return Math.min(1, Math.max(0, val));\n}\nfunction hsla(origColor, hsl) {\n const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a);\n if (color) {\n if (origColor.value && \n /^(rgb|hsl)/.test(origColor.value)) {\n color.value = origColor.value;\n } else {\n color.value = 'rgb';\n }\n return color;\n }\n}\nfunction toHSL(color) {\n if (color.toHSL) {\n return color.toHSL();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction toHSV(color) {\n if (color.toHSV) {\n return color.toHSV();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction number(n) {\n if (n instanceof Dimension) {\n return parseFloat(n.unit.is('%') ? n.value / 100 : n.value);\n } else if (typeof n === 'number') {\n return n;\n } else {\n throw {\n type: 'Argument',\n message: 'color functions take numbers as parameters'\n };\n }\n}\nfunction scaled(n, size) {\n if (n instanceof Dimension && n.unit.is('%')) {\n return parseFloat(n.value * size / 100);\n } else {\n return number(n);\n }\n}\ncolorFunctions = {\n rgb: function (r, g, b) {\n const color = colorFunctions.rgba(r, g, b, 1.0);\n if (color) {\n color.value = 'rgb';\n return color;\n }\n },\n rgba: function (r, g, b, a) {\n try {\n if (r instanceof Color) {\n if (g) {\n a = number(g);\n } else {\n a = r.alpha;\n }\n return new Color(r.rgb, a, 'rgba');\n }\n const rgb = [r, g, b].map(c => scaled(c, 255));\n a = number(a);\n return new Color(rgb, a, 'rgba');\n }\n catch (e) {}\n },\n hsl: function (h, s, l) {\n const color = colorFunctions.hsla(h, s, l, 1.0);\n if (color) {\n color.value = 'hsl';\n return color;\n }\n },\n hsla: function (h, s, l, a) {\n try {\n if (h instanceof Color) {\n if (s) {\n a = number(s);\n } else {\n a = h.alpha;\n }\n return new Color(h.rgb, a, 'hsla');\n }\n\n let m1;\n let m2;\n\n function hue(h) {\n h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);\n if (h * 6 < 1) {\n return m1 + (m2 - m1) * h * 6;\n }\n else if (h * 2 < 1) {\n return m2;\n }\n else if (h * 3 < 2) {\n return m1 + (m2 - m1) * (2 / 3 - h) * 6;\n }\n else {\n return m1;\n }\n }\n\n h = (number(h) % 360) / 360;\n s = clamp(number(s));l = clamp(number(l));a = clamp(number(a));\n\n m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;\n m1 = l * 2 - m2;\n\n const rgb = [\n hue(h + 1 / 3) * 255,\n hue(h) * 255,\n hue(h - 1 / 3) * 255\n ];\n a = number(a);\n return new Color(rgb, a, 'hsla');\n }\n catch (e) {}\n },\n\n hsv: function(h, s, v) {\n return colorFunctions.hsva(h, s, v, 1.0);\n },\n\n hsva: function(h, s, v, a) {\n h = ((number(h) % 360) / 360) * 360;\n s = number(s);v = number(v);a = number(a);\n\n let i;\n let f;\n i = Math.floor((h / 60) % 6);\n f = (h / 60) - i;\n\n const vs = [v,\n v * (1 - s),\n v * (1 - f * s),\n v * (1 - (1 - f) * s)];\n const perm = [[0, 3, 1],\n [2, 0, 1],\n [1, 0, 3],\n [1, 2, 0],\n [3, 1, 0],\n [0, 1, 2]];\n\n return colorFunctions.rgba(vs[perm[i][0]] * 255,\n vs[perm[i][1]] * 255,\n vs[perm[i][2]] * 255,\n a);\n },\n\n hue: function (color) {\n return new Dimension(toHSL(color).h);\n },\n saturation: function (color) {\n return new Dimension(toHSL(color).s * 100, '%');\n },\n lightness: function (color) {\n return new Dimension(toHSL(color).l * 100, '%');\n },\n hsvhue: function(color) {\n return new Dimension(toHSV(color).h);\n },\n hsvsaturation: function (color) {\n return new Dimension(toHSV(color).s * 100, '%');\n },\n hsvvalue: function (color) {\n return new Dimension(toHSV(color).v * 100, '%');\n },\n red: function (color) {\n return new Dimension(color.rgb[0]);\n },\n green: function (color) {\n return new Dimension(color.rgb[1]);\n },\n blue: function (color) {\n return new Dimension(color.rgb[2]);\n },\n alpha: function (color) {\n return new Dimension(toHSL(color).a);\n },\n luma: function (color) {\n return new Dimension(color.luma() * color.alpha * 100, '%');\n },\n luminance: function (color) {\n const luminance =\n (0.2126 * color.rgb[0] / 255) +\n (0.7152 * color.rgb[1] / 255) +\n (0.0722 * color.rgb[2] / 255);\n\n return new Dimension(luminance * color.alpha * 100, '%');\n },\n saturate: function (color, amount, method) {\n // filter: saturate(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s += hsl.s * amount.value / 100;\n }\n else {\n hsl.s += amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n desaturate: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s -= hsl.s * amount.value / 100;\n }\n else {\n hsl.s -= amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n lighten: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l += hsl.l * amount.value / 100;\n }\n else {\n hsl.l += amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n darken: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l -= hsl.l * amount.value / 100;\n }\n else {\n hsl.l -= amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n fadein: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a += hsl.a * amount.value / 100;\n }\n else {\n hsl.a += amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fadeout: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a -= hsl.a * amount.value / 100;\n }\n else {\n hsl.a -= amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fade: function (color, amount) {\n const hsl = toHSL(color);\n\n hsl.a = amount.value / 100;\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n spin: function (color, amount) {\n const hsl = toHSL(color);\n const hue = (hsl.h + amount.value) % 360;\n\n hsl.h = hue < 0 ? 360 + hue : hue;\n\n return hsla(color, hsl);\n },\n //\n // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein\n // http://sass-lang.com\n //\n mix: function (color1, color2, weight) {\n if (!weight) {\n weight = new Dimension(50);\n }\n const p = weight.value / 100.0;\n const w = p * 2 - 1;\n const a = toHSL(color1).a - toHSL(color2).a;\n\n const w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;\n const w2 = 1 - w1;\n\n const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,\n color1.rgb[1] * w1 + color2.rgb[1] * w2,\n color1.rgb[2] * w1 + color2.rgb[2] * w2];\n\n const alpha = color1.alpha * p + color2.alpha * (1 - p);\n\n return new Color(rgb, alpha);\n },\n greyscale: function (color) {\n return colorFunctions.desaturate(color, new Dimension(100));\n },\n contrast: function (color, dark, light, threshold) {\n // filter: contrast(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n if (typeof light === 'undefined') {\n light = colorFunctions.rgba(255, 255, 255, 1.0);\n }\n if (typeof dark === 'undefined') {\n dark = colorFunctions.rgba(0, 0, 0, 1.0);\n }\n // Figure out which is actually light and dark:\n if (dark.luma() > light.luma()) {\n const t = light;\n light = dark;\n dark = t;\n }\n if (typeof threshold === 'undefined') {\n threshold = 0.43;\n } else {\n threshold = number(threshold);\n }\n if (color.luma() < threshold) {\n return light;\n } else {\n return dark;\n }\n },\n // Changes made in 2.7.0 - Reverted in 3.0.0\n // contrast: function (color, color1, color2, threshold) {\n // // Return which of `color1` and `color2` has the greatest contrast with `color`\n // // according to the standard WCAG contrast ratio calculation.\n // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef\n // // The threshold param is no longer used, in line with SASS.\n // // filter: contrast(3.2);\n // // should be kept as is, so check for color\n // if (!color.rgb) {\n // return null;\n // }\n // if (typeof color1 === 'undefined') {\n // color1 = colorFunctions.rgba(0, 0, 0, 1.0);\n // }\n // if (typeof color2 === 'undefined') {\n // color2 = colorFunctions.rgba(255, 255, 255, 1.0);\n // }\n // var contrast1, contrast2;\n // var luma = color.luma();\n // var luma1 = color1.luma();\n // var luma2 = color2.luma();\n // // Calculate contrast ratios for each color\n // if (luma > luma1) {\n // contrast1 = (luma + 0.05) / (luma1 + 0.05);\n // } else {\n // contrast1 = (luma1 + 0.05) / (luma + 0.05);\n // }\n // if (luma > luma2) {\n // contrast2 = (luma + 0.05) / (luma2 + 0.05);\n // } else {\n // contrast2 = (luma2 + 0.05) / (luma + 0.05);\n // }\n // if (contrast1 > contrast2) {\n // return color1;\n // } else {\n // return color2;\n // }\n // },\n argb: function (color) {\n return new Anonymous(color.toARGB());\n },\n color: function(c) {\n if ((c instanceof Quoted) &&\n (/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value))) {\n const val = c.value.slice(1);\n return new Color(val, undefined, `#${val}`);\n }\n if ((c instanceof Color) || (c = Color.fromKeyword(c.value))) {\n c.value = undefined;\n return c;\n }\n throw {\n type: 'Argument',\n message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF'\n };\n },\n tint: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount);\n },\n shade: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount);\n }\n};\n\nexport default colorFunctions;\n","import Color from '../tree/color';\n\n// Color Blending\n// ref: http://www.w3.org/TR/compositing-1\n\nfunction colorBlend(mode, color1, color2) {\n const ab = color1.alpha; // result\n\n let // backdrop\n cb;\n\n const as = color2.alpha;\n\n let // source\n cs;\n\n let ar;\n let cr;\n const r = [];\n\n ar = as + ab * (1 - as);\n for (let i = 0; i < 3; i++) {\n cb = color1.rgb[i] / 255;\n cs = color2.rgb[i] / 255;\n cr = mode(cb, cs);\n if (ar) {\n cr = (as * cs + ab * (cb -\n as * (cb + cs - cr))) / ar;\n }\n r[i] = cr * 255;\n }\n\n return new Color(r, ar);\n}\n\nconst colorBlendModeFunctions = {\n multiply: function(cb, cs) {\n return cb * cs;\n },\n screen: function(cb, cs) {\n return cb + cs - cb * cs;\n },\n overlay: function(cb, cs) {\n cb *= 2;\n return (cb <= 1) ?\n colorBlendModeFunctions.multiply(cb, cs) :\n colorBlendModeFunctions.screen(cb - 1, cs);\n },\n softlight: function(cb, cs) {\n let d = 1;\n let e = cb;\n if (cs > 0.5) {\n e = 1;\n d = (cb > 0.25) ? Math.sqrt(cb)\n : ((16 * cb - 12) * cb + 4) * cb;\n }\n return cb - (1 - 2 * cs) * e * (d - cb);\n },\n hardlight: function(cb, cs) {\n return colorBlendModeFunctions.overlay(cs, cb);\n },\n difference: function(cb, cs) {\n return Math.abs(cb - cs);\n },\n exclusion: function(cb, cs) {\n return cb + cs - 2 * cb * cs;\n },\n\n // non-w3c functions:\n average: function(cb, cs) {\n return (cb + cs) / 2;\n },\n negation: function(cb, cs) {\n return 1 - Math.abs(cb + cs - 1);\n }\n};\n\nfor (const f in colorBlendModeFunctions) {\n if (colorBlendModeFunctions.hasOwnProperty(f)) {\n colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]);\n }\n}\n\nexport default colorBlend;\n","import Quoted from '../tree/quoted';\nimport URL from '../tree/url';\nimport * as utils from '../utils';\nimport logger from '../logger';\n\nexport default environment => {\n \n const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); \n\n return { 'data-uri': function(mimetypeNode, filePathNode) {\n\n if (!filePathNode) {\n filePathNode = mimetypeNode;\n mimetypeNode = null;\n }\n\n let mimetype = mimetypeNode && mimetypeNode.value;\n let filePath = filePathNode.value;\n const currentFileInfo = this.currentFileInfo;\n const currentDirectory = currentFileInfo.rewriteUrls ?\n currentFileInfo.currentDirectory : currentFileInfo.entryPath;\n\n const fragmentStart = filePath.indexOf('#');\n let fragment = '';\n if (fragmentStart !== -1) {\n fragment = filePath.slice(fragmentStart);\n filePath = filePath.slice(0, fragmentStart);\n }\n const context = utils.clone(this.context);\n context.rawBuffer = true;\n\n const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true);\n\n if (!fileManager) {\n return fallback(this, filePathNode);\n }\n\n let useBase64 = false;\n\n // detect the mimetype if not given\n if (!mimetypeNode) {\n\n mimetype = environment.mimeLookup(filePath);\n\n if (mimetype === 'image/svg+xml') {\n useBase64 = false;\n } else {\n // use base 64 unless it's an ASCII or UTF-8 format\n const charset = environment.charsetLookup(mimetype);\n useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0;\n }\n if (useBase64) { mimetype += ';base64'; }\n }\n else {\n useBase64 = /;base64$/.test(mimetype);\n }\n\n const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment);\n if (!fileSync.contents) {\n logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`);\n return fallback(this, filePathNode || mimetypeNode);\n }\n let buf = fileSync.contents;\n if (useBase64 && !environment.encodeBase64) {\n return fallback(this, filePathNode);\n }\n\n buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf);\n\n const uri = `data:${mimetype},${buf}${fragment}`;\n\n return new URL(new Quoted(`\"${uri}\"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import Comment from '../tree/comment';\nimport Dimension from '../tree/dimension';\nimport Declaration from '../tree/declaration';\nimport Expression from '../tree/expression';\nimport Ruleset from '../tree/ruleset';\nimport Selector from '../tree/selector';\nimport Element from '../tree/element';\nimport Quote from '../tree/quoted';\n\nconst getItemsFromNode = node => {\n // handle non-array values as an array of length 1\n // return 'undefined' if index is invalid\n const items = Array.isArray(node.value) ?\n node.value : Array(node);\n\n return items;\n};\n\nexport default {\n _SELF: function(n) {\n return n;\n },\n extract: function(values, index) {\n index = index.value - 1; // (1-based index)\n\n return getItemsFromNode(values)[index];\n },\n length: function(values) {\n return new Dimension(getItemsFromNode(values).length);\n },\n /**\n * Creates a Less list of incremental values.\n * Modeled after Lodash's range function, also exists natively in PHP\n * \n * @param {Dimension} [start=1]\n * @param {Dimension} end - e.g. 10 or 10px - unit is added to output\n * @param {Dimension} [step=1] \n */\n range: function(start, end, step) {\n let from;\n let to;\n let stepValue = 1;\n const list = [];\n if (end) {\n to = end;\n from = start.value;\n if (step) {\n stepValue = step.value;\n }\n }\n else {\n from = 1;\n to = start;\n }\n\n for (let i = from; i <= to.value; i += stepValue) {\n list.push(new Dimension(i, to.unit));\n }\n\n return new Expression(list);\n },\n each: function(list, rs) {\n const rules = [];\n let newRules;\n let iterator;\n\n if (list.value && !(list instanceof Quote)) {\n if (Array.isArray(list.value)) {\n iterator = list.value;\n } else {\n iterator = [list.value];\n }\n } else if (list.ruleset) {\n iterator = list.ruleset.rules;\n } else if (list.rules) {\n iterator = list.rules;\n } else if (Array.isArray(list)) {\n iterator = list;\n } else {\n iterator = [list];\n }\n\n let valueName = '@value';\n let keyName = '@key';\n let indexName = '@index';\n\n if (rs.params) {\n valueName = rs.params[0] && rs.params[0].name;\n keyName = rs.params[1] && rs.params[1].name;\n indexName = rs.params[2] && rs.params[2].name;\n rs = rs.rules;\n } else {\n rs = rs.ruleset;\n }\n\n for (let i = 0; i < iterator.length; i++) {\n let key;\n let value;\n const item = iterator[i];\n if (item instanceof Declaration) {\n key = typeof item.name === 'string' ? item.name : item.name[0].value;\n value = item.value;\n } else {\n key = new Dimension(i + 1);\n value = item;\n }\n\n if (item instanceof Comment) {\n continue;\n }\n\n newRules = rs.rules.slice(0);\n if (valueName) {\n newRules.push(new Declaration(valueName,\n value,\n false, false, this.index, this.currentFileInfo));\n }\n if (indexName) {\n newRules.push(new Declaration(indexName,\n new Dimension(i + 1),\n false, false, this.index, this.currentFileInfo));\n }\n if (keyName) {\n newRules.push(new Declaration(keyName,\n key,\n false, false, this.index, this.currentFileInfo));\n }\n\n rules.push(new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n newRules,\n rs.strictImports,\n rs.visibilityInfo()\n ));\n }\n\n return new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n rules,\n rs.strictImports,\n rs.visibilityInfo()\n ).eval(this.context);\n }\n};\n","import Dimension from '../tree/dimension';\n\nconst MathHelper = (fn, unit, n) => {\n if (!(n instanceof Dimension)) {\n throw { type: 'Argument', message: 'argument must be a number' };\n }\n if (unit == null) {\n unit = n.unit;\n } else {\n n = n.unify();\n }\n return new Dimension(fn(parseFloat(n.value)), unit);\n};\n\nexport default MathHelper;","import mathHelper from './math-helper.js';\n\nconst mathFunctions = {\n // name, unit\n ceil: null,\n floor: null,\n sqrt: null,\n abs: null,\n tan: '',\n sin: '',\n cos: '',\n atan: 'rad',\n asin: 'rad',\n acos: 'rad'\n};\n\nfor (const f in mathFunctions) {\n if (mathFunctions.hasOwnProperty(f)) {\n mathFunctions[f] = mathHelper.bind(null, Math[f], mathFunctions[f]);\n }\n}\n\nmathFunctions.round = (n, f) => {\n const fraction = typeof f === 'undefined' ? 0 : f.value;\n return mathHelper(num => num.toFixed(fraction), null, n);\n};\n\nexport default mathFunctions;\n","import Dimension from '../tree/dimension';\nimport Anonymous from '../tree/anonymous';\nimport mathHelper from './math-helper.js';\n\nconst minMax = function (isMin, args) {\n args = Array.prototype.slice.call(args);\n switch (args.length) {\n case 0: throw { type: 'Argument', message: 'one or more arguments required' };\n }\n let i; // key is the unit.toString() for unified Dimension values,\n let j;\n let current;\n let currentUnified;\n let referenceUnified;\n let unit;\n let unitStatic;\n let unitClone;\n\n const // elems only contains original argument values.\n order = [];\n\n const values = {};\n // value is the index into the order array.\n for (i = 0; i < args.length; i++) {\n current = args[i];\n if (!(current instanceof Dimension)) {\n if (Array.isArray(args[i].value)) {\n Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value));\n }\n continue;\n }\n currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify();\n unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString();\n unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic;\n unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone;\n j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit];\n if (j === undefined) {\n if (unitStatic !== undefined && unit !== unitStatic) {\n throw { type: 'Argument', message: 'incompatible types' };\n }\n values[unit] = order.length;\n order.push(current);\n continue;\n }\n referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify();\n if ( isMin && currentUnified.value < referenceUnified.value ||\n !isMin && currentUnified.value > referenceUnified.value) {\n order[j] = current;\n }\n }\n if (order.length == 1) {\n return order[0];\n }\n args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', ');\n return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`);\n};\n\nexport default {\n min: function(...args) {\n return minMax(true, args);\n },\n max: function(...args) {\n return minMax(false, args);\n },\n convert: function (val, unit) {\n return val.convertTo(unit.value);\n },\n pi: function () {\n return new Dimension(Math.PI);\n },\n mod: function(a, b) {\n return new Dimension(a.value % b.value, a.unit);\n },\n pow: function(x, y) {\n if (typeof x === 'number' && typeof y === 'number') {\n x = new Dimension(x);\n y = new Dimension(y);\n } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) {\n throw { type: 'Argument', message: 'arguments must be numbers' };\n }\n\n return new Dimension(Math.pow(x.value, y.value), x.unit);\n },\n percentage: function (n) {\n const result = mathHelper(num => num * 100, '%', n);\n\n return result;\n }\n};\n","import Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport Quote from '../tree/quoted';\nimport JavaScript from '../tree/javascript';\n\nexport default {\n e: function (str) {\n return new Quote('\"', str instanceof JavaScript ? str.evaluated : str.value, true);\n },\n escape: function (str) {\n return new Anonymous(\n encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B')\n .replace(/\\(/g, '%28').replace(/\\)/g, '%29'));\n },\n replace: function (string, pattern, replacement, flags) {\n let result = string.value;\n replacement = (replacement.type === 'Quoted') ?\n replacement.value : replacement.toCSS();\n result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement);\n return new Quoted(string.quote || '', result, string.escaped);\n },\n '%': function (string /* arg, arg, ... */) {\n const args = Array.prototype.slice.call(arguments, 1);\n let result = string.value;\n\n for (let i = 0; i < args.length; i++) {\n /* jshint loopfunc:true */\n result = result.replace(/%[sda]/i, token => {\n const value = ((args[i].type === 'Quoted') &&\n token.match(/s/i)) ? args[i].value : args[i].toCSS();\n return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;\n });\n }\n result = result.replace(/%%/g, '%');\n return new Quoted(string.quote || '', result, string.escaped);\n }\n};\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Expression from '../tree/expression';\nimport Quoted from '../tree/quoted';\nimport URL from '../tree/url';\n\nexport default environment => {\n return { 'svg-gradient': function(direction) {\n let stops;\n let gradientDirectionSvg;\n let gradientType = 'linear';\n let rectangleDimension = 'x=\"0\" y=\"0\" width=\"1\" height=\"1\"';\n const renderEnv = {compress: false};\n let returner;\n const directionValue = direction.toCSS(renderEnv);\n let i;\n let color;\n let position;\n let positionValue;\n let alpha;\n\n function throwArgumentDescriptor() {\n throw { type: 'Argument',\n message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' +\n ' end_color [end_position] or direction, color list' };\n }\n\n if (arguments.length == 2) {\n if (arguments[1].value.length < 2) {\n throwArgumentDescriptor();\n }\n stops = arguments[1].value;\n } else if (arguments.length < 3) {\n throwArgumentDescriptor();\n } else {\n stops = Array.prototype.slice.call(arguments, 1);\n }\n\n switch (directionValue) {\n case 'to bottom':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"0%\" y2=\"100%\"';\n break;\n case 'to right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'to bottom right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"100%\"';\n break;\n case 'to top right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"100%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'ellipse':\n case 'ellipse at center':\n gradientType = 'radial';\n gradientDirectionSvg = 'cx=\"50%\" cy=\"50%\" r=\"75%\"';\n rectangleDimension = 'x=\"-50\" y=\"-50\" width=\"101\" height=\"101\"';\n break;\n default:\n throw { type: 'Argument', message: 'svg-gradient direction must be \\'to bottom\\', \\'to right\\',' +\n ' \\'to bottom right\\', \\'to top right\\' or \\'ellipse at center\\'' };\n }\n returner = `<${gradientType}Gradient id=\"g\" ${gradientDirectionSvg}>`;\n\n for (i = 0; i < stops.length; i += 1) {\n if (stops[i] instanceof Expression) {\n color = stops[i].value[0];\n position = stops[i].value[1];\n } else {\n color = stops[i];\n position = undefined;\n }\n\n if (!(color instanceof Color) || (!((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension))) {\n throwArgumentDescriptor();\n }\n positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%';\n alpha = color.alpha;\n returner += ``;\n }\n returner += ``;\n\n returner = encodeURIComponent(returner);\n\n returner = `data:image/svg+xml,${returner}`;\n return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import Keyword from '../tree/keyword';\nimport DetachedRuleset from '../tree/detached-ruleset';\nimport Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport URL from '../tree/url';\nimport Operation from '../tree/operation';\n\nconst isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False;\nconst isunit = (n, unit) => {\n if (unit === undefined) {\n throw { type: 'Argument', message: 'missing the required second argument to isunit.' };\n }\n unit = typeof unit.value === 'string' ? unit.value : unit;\n if (typeof unit !== 'string') {\n throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' };\n }\n return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False;\n};\n\nexport default {\n isruleset: function (n) {\n return isa(n, DetachedRuleset);\n },\n iscolor: function (n) {\n return isa(n, Color);\n },\n isnumber: function (n) {\n return isa(n, Dimension);\n },\n isstring: function (n) {\n return isa(n, Quoted);\n },\n iskeyword: function (n) {\n return isa(n, Keyword);\n },\n isurl: function (n) {\n return isa(n, URL);\n },\n ispixel: function (n) {\n return isunit(n, 'px');\n },\n ispercentage: function (n) {\n return isunit(n, '%');\n },\n isem: function (n) {\n return isunit(n, 'em');\n },\n isunit,\n unit: function (val, unit) {\n if (!(val instanceof Dimension)) {\n throw { type: 'Argument',\n message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` };\n }\n if (unit) {\n if (unit instanceof Keyword) {\n unit = unit.value;\n } else {\n unit = unit.toCSS();\n }\n } else {\n unit = '';\n }\n return new Dimension(val.value, unit);\n },\n 'get-unit': function (n) {\n return new Anonymous(n.unit);\n }\n};\n","import functionRegistry from './function-registry';\nimport functionCaller from './function-caller';\n\nimport boolean from './boolean';\nimport defaultFunc from './default';\nimport color from './color';\nimport colorBlending from './color-blending';\nimport dataUri from './data-uri';\nimport list from './list';\nimport math from './math';\nimport number from './number';\nimport string from './string';\nimport svg from './svg';\nimport types from './types';\n\nexport default environment => {\n const functions = { functionRegistry, functionCaller };\n\n // register functions\n functionRegistry.addMultiple(boolean);\n functionRegistry.addMultiple(defaultFunc);\n functionRegistry.addMultiple(color);\n functionRegistry.addMultiple(colorBlending);\n functionRegistry.addMultiple(dataUri(environment));\n functionRegistry.addMultiple(list);\n functionRegistry.addMultiple(math);\n functionRegistry.addMultiple(number);\n functionRegistry.addMultiple(string);\n functionRegistry.addMultiple(svg(environment));\n functionRegistry.addMultiple(types);\n\n return functions;\n};\n","export default environment => {\n class SourceMapOutput {\n constructor(options) {\n this._css = [];\n this._rootNode = options.rootNode;\n this._contentsMap = options.contentsMap;\n this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap;\n if (options.sourceMapFilename) {\n this._sourceMapFilename = options.sourceMapFilename.replace(/\\\\/g, '/');\n }\n this._outputFilename = options.outputFilename;\n this.sourceMapURL = options.sourceMapURL;\n if (options.sourceMapBasepath) {\n this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\\\/g, '/');\n }\n if (options.sourceMapRootpath) {\n this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\\\/g, '/');\n if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') {\n this._sourceMapRootpath += '/';\n }\n } else {\n this._sourceMapRootpath = '';\n }\n this._outputSourceFiles = options.outputSourceFiles;\n this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator();\n\n this._lineNumber = 0;\n this._column = 0;\n }\n\n removeBasepath(path) {\n if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) {\n path = path.substring(this._sourceMapBasepath.length);\n if (path.charAt(0) === '\\\\' || path.charAt(0) === '/') {\n path = path.substring(1);\n }\n }\n\n return path;\n }\n\n normalizeFilename(filename) {\n filename = filename.replace(/\\\\/g, '/');\n filename = this.removeBasepath(filename);\n return (this._sourceMapRootpath || '') + filename;\n }\n\n add(chunk, fileInfo, index, mapLines) {\n // ignore adding empty strings\n if (!chunk) {\n return;\n }\n\n let lines;\n let sourceLines;\n let columns;\n let sourceColumns;\n let i;\n\n if (fileInfo && fileInfo.filename) {\n let inputSource = this._contentsMap[fileInfo.filename];\n\n // remove vars/banner added to the top of the file\n if (this._contentsIgnoredCharsMap[fileInfo.filename]) {\n // adjust the index\n index -= this._contentsIgnoredCharsMap[fileInfo.filename];\n if (index < 0) { index = 0; }\n // adjust the source\n inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]);\n }\n\n // ignore empty content\n if (inputSource === undefined) {\n return;\n }\n\n inputSource = inputSource.substring(0, index);\n sourceLines = inputSource.split('\\n');\n sourceColumns = sourceLines[sourceLines.length - 1];\n }\n\n lines = chunk.split('\\n');\n columns = lines[lines.length - 1];\n\n if (fileInfo && fileInfo.filename) {\n if (!mapLines) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column},\n original: { line: sourceLines.length, column: sourceColumns.length},\n source: this.normalizeFilename(fileInfo.filename)});\n } else {\n for (i = 0; i < lines.length; i++) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0},\n original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0},\n source: this.normalizeFilename(fileInfo.filename)});\n }\n }\n }\n\n if (lines.length === 1) {\n this._column += columns.length;\n } else {\n this._lineNumber += lines.length - 1;\n this._column = columns.length;\n }\n\n this._css.push(chunk);\n }\n\n isEmpty() {\n return this._css.length === 0;\n }\n\n toCSS(context) {\n this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null });\n\n if (this._outputSourceFiles) {\n for (const filename in this._contentsMap) {\n if (this._contentsMap.hasOwnProperty(filename)) {\n let source = this._contentsMap[filename];\n if (this._contentsIgnoredCharsMap[filename]) {\n source = source.slice(this._contentsIgnoredCharsMap[filename]);\n }\n this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source);\n }\n }\n }\n\n this._rootNode.genCSS(context, this);\n\n if (this._css.length > 0) {\n let sourceMapURL;\n const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON());\n\n if (this.sourceMapURL) {\n sourceMapURL = this.sourceMapURL;\n } else if (this._sourceMapFilename) {\n sourceMapURL = this._sourceMapFilename;\n }\n this.sourceMapURL = sourceMapURL;\n\n this.sourceMap = sourceMapContent;\n }\n\n return this._css.join('');\n }\n }\n\n return SourceMapOutput;\n};\n","export default (SourceMapOutput, environment) => {\n class SourceMapBuilder {\n constructor(options) {\n this.options = options;\n }\n\n toCSS(rootNode, options, imports) {\n const sourceMapOutput = new SourceMapOutput(\n {\n contentsIgnoredCharsMap: imports.contentsIgnoredChars,\n rootNode,\n contentsMap: imports.contents,\n sourceMapFilename: this.options.sourceMapFilename,\n sourceMapURL: this.options.sourceMapURL,\n outputFilename: this.options.sourceMapOutputFilename,\n sourceMapBasepath: this.options.sourceMapBasepath,\n sourceMapRootpath: this.options.sourceMapRootpath,\n outputSourceFiles: this.options.outputSourceFiles,\n sourceMapGenerator: this.options.sourceMapGenerator,\n sourceMapFileInline: this.options.sourceMapFileInline\n });\n\n const css = sourceMapOutput.toCSS(options);\n this.sourceMap = sourceMapOutput.sourceMap;\n this.sourceMapURL = sourceMapOutput.sourceMapURL;\n if (this.options.sourceMapInputFilename) {\n this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename);\n }\n if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) {\n this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL);\n }\n return css + this.getCSSAppendage();\n }\n\n getCSSAppendage() {\n\n let sourceMapURL = this.sourceMapURL;\n if (this.options.sourceMapFileInline) {\n if (this.sourceMap === undefined) {\n return '';\n }\n sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`;\n }\n\n if (sourceMapURL) {\n return `/*# sourceMappingURL=${sourceMapURL} */`;\n }\n return '';\n }\n\n getExternalSourceMap() {\n return this.sourceMap;\n }\n\n setExternalSourceMap(sourceMap) {\n this.sourceMap = sourceMap;\n }\n\n isInline() {\n return this.options.sourceMapFileInline;\n }\n\n getSourceMapURL() {\n return this.sourceMapURL;\n }\n\n getOutputFilename() {\n return this.options.sourceMapOutputFilename;\n }\n\n getInputFilename() {\n return this.sourceMapInputFilename;\n }\n }\n\n return SourceMapBuilder;\n};\n","import contexts from './contexts';\nimport visitor from './visitors';\nimport tree from './tree';\n\nexport default (root, options = {}) => {\n let evaldRoot;\n let variables = options.variables;\n const evalEnv = new contexts.Eval(options);\n\n //\n // Allows setting variables with a hash, so:\n //\n // `{ color: new tree.Color('#f01') }` will become:\n //\n // new tree.Declaration('@color',\n // new tree.Value([\n // new tree.Expression([\n // new tree.Color('#f01')\n // ])\n // ])\n // )\n //\n if (typeof variables === 'object' && !Array.isArray(variables)) {\n variables = Object.keys(variables).map(k => {\n let value = variables[k];\n\n if (!(value instanceof tree.Value)) {\n if (!(value instanceof tree.Expression)) {\n value = new tree.Expression([value]);\n }\n value = new tree.Value([value]);\n }\n return new tree.Declaration(`@${k}`, value, false, null, 0);\n });\n evalEnv.frames = [new tree.Ruleset(null, variables)];\n }\n\n const visitors = [\n new visitor.JoinSelectorVisitor(),\n new visitor.MarkVisibleSelectorsVisitor(true),\n new visitor.ExtendVisitor(),\n new visitor.ToCSSVisitor({compress: Boolean(options.compress)})\n ];\n\n const preEvalVisitors = [];\n let v;\n let visitorIterator;\n\n /**\n * first() / get() allows visitors to be added while visiting\n * \n * @todo Add scoping for visitors just like functions for @plugin; right now they're global\n */\n if (options.pluginManager) {\n visitorIterator = options.pluginManager.visitor();\n for (var i = 0; i < 2; i++) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (v.isPreEvalVisitor) {\n if (i === 0 || preEvalVisitors.indexOf(v) === -1) {\n preEvalVisitors.push(v);\n v.run(root);\n }\n }\n else {\n if (i === 0 || visitors.indexOf(v) === -1) {\n if (v.isPreVisitor) {\n visitors.unshift(v);\n }\n else {\n visitors.push(v);\n }\n }\n }\n }\n }\n }\n\n evaldRoot = root.eval(evalEnv);\n\n for (var i = 0; i < visitors.length; i++) {\n visitors[i].run(evaldRoot);\n }\n\n // Run any remaining visitors added after eval pass\n if (options.pluginManager) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (visitors.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) {\n v.run(evaldRoot);\n }\n }\n }\n\n return evaldRoot;\n};\n","import LessError from './less-error';\nimport transformTree from './transform-tree';\nimport logger from './logger';\n\nexport default SourceMapBuilder => {\n class ParseTree {\n constructor(root, imports) {\n this.root = root;\n this.imports = imports;\n }\n\n toCSS(options) {\n let evaldRoot;\n const result = {};\n let sourceMapBuilder;\n try {\n evaldRoot = transformTree(this.root, options);\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n try {\n const compress = Boolean(options.compress);\n if (compress) {\n logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.');\n }\n\n const toCSSOptions = {\n compress,\n dumpLineNumbers: options.dumpLineNumbers,\n strictUnits: Boolean(options.strictUnits),\n numPrecision: 8};\n\n if (options.sourceMap) {\n sourceMapBuilder = new SourceMapBuilder(options.sourceMap);\n result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports);\n } else {\n result.css = evaldRoot.toCSS(toCSSOptions);\n }\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n if (options.pluginManager) {\n const postProcessors = options.pluginManager.getPostProcessors();\n for (let i = 0; i < postProcessors.length; i++) {\n result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options, imports: this.imports });\n }\n }\n if (options.sourceMap) {\n result.map = sourceMapBuilder.getExternalSourceMap();\n }\n\n result.imports = [];\n for (const file in this.imports.files) {\n if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) {\n result.imports.push(file);\n }\n }\n return result;\n }\n }\n\n return ParseTree;\n};\n","import contexts from './contexts';\nimport Parser from './parser/parser';\nimport LessError from './less-error';\nimport * as utils from './utils';\nimport logger from './logger';\n\nexport default environment => {\n // FileInfo = {\n // 'rewriteUrls' - option - whether to adjust URL's to be relative\n // 'filename' - full resolved filename of current file\n // 'rootpath' - path to append to normal URLs for this node\n // 'currentDirectory' - path to the current file, absolute\n // 'rootFilename' - filename of the base file\n // 'entryPath' - absolute path to the entry file\n // 'reference' - whether the file should not be output and only output parts that are referenced\n\n class ImportManager {\n constructor(less, context, rootFileInfo) {\n this.less = less;\n this.rootFilename = rootFileInfo.filename;\n this.paths = context.paths || []; // Search paths, when importing\n this.contents = {}; // map - filename to contents of all the files\n this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore\n this.mime = context.mime;\n this.error = null;\n this.context = context;\n // Deprecated? Unused outside of here, could be useful.\n this.queue = []; // Files which haven't been imported yet\n this.files = {}; // Holds the imported parse trees.\n }\n\n /**\n * Add an import to be imported\n * @param path - the raw path\n * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension)\n * @param currentFileInfo - the current file info (used for instance to work out relative paths)\n * @param importOptions - import options\n * @param callback - callback for when it is imported\n */\n push(path, tryAppendExtension, currentFileInfo, importOptions, callback) {\n const importManager = this;\n const pluginLoader = this.context.pluginManager.Loader;\n\n this.queue.push(path);\n\n const fileParsedFunc = (e, root, fullPath) => {\n importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue\n\n const importedEqualsRoot = fullPath === importManager.rootFilename;\n if (importOptions.optional && e) {\n callback(null, {rules:[]}, false, null);\n logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`);\n }\n else {\n // Inline imports aren't cached here.\n // If we start to cache them, please make sure they won't conflict with non-inline imports of the\n // same name as they used to do before this comment and the condition below have been added.\n if (!importManager.files[fullPath] && !importOptions.inline) {\n importManager.files[fullPath] = { root, options: importOptions };\n }\n if (e && !importManager.error) { importManager.error = e; }\n callback(e, root, importedEqualsRoot, fullPath);\n }\n };\n\n const newFileInfo = {\n rewriteUrls: this.context.rewriteUrls,\n entryPath: currentFileInfo.entryPath,\n rootpath: currentFileInfo.rootpath,\n rootFilename: currentFileInfo.rootFilename\n };\n\n const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment);\n\n if (!fileManager) {\n fileParsedFunc({ message: `Could not find a file-manager for ${path}` });\n return;\n }\n\n const loadFileCallback = loadedFile => {\n let plugin;\n const resolvedFilename = loadedFile.filename;\n const contents = loadedFile.contents.replace(/^\\uFEFF/, '');\n\n // Pass on an updated rootpath if path of imported file is relative and file\n // is in a (sub|sup) directory\n //\n // Examples:\n // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/',\n // then rootpath should become 'less/module/nav/'\n // - If path of imported file is '../mixins.less' and rootpath is 'less/',\n // then rootpath should become 'less/../'\n newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename);\n if (newFileInfo.rewriteUrls) {\n newFileInfo.rootpath = fileManager.join(\n (importManager.context.rootpath || ''),\n fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath));\n\n if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) {\n newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath);\n }\n }\n newFileInfo.filename = resolvedFilename;\n\n const newEnv = new contexts.Parse(importManager.context);\n\n newEnv.processImports = false;\n importManager.contents[resolvedFilename] = contents;\n\n if (currentFileInfo.reference || importOptions.reference) {\n newFileInfo.reference = true;\n }\n\n if (importOptions.isPlugin) {\n plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo);\n if (plugin instanceof LessError) {\n fileParsedFunc(plugin, null, resolvedFilename);\n }\n else {\n fileParsedFunc(null, plugin, resolvedFilename);\n }\n } else if (importOptions.inline) {\n fileParsedFunc(null, contents, resolvedFilename);\n } else {\n\n // import (multiple) parse trees apparently get altered and can't be cached.\n // TODO: investigate why this is\n if (importManager.files[resolvedFilename]\n && !importManager.files[resolvedFilename].options.multiple\n && !importOptions.multiple) {\n\n fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename);\n }\n else {\n new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => {\n fileParsedFunc(e, root, resolvedFilename);\n });\n }\n }\n };\n let promise;\n const context = utils.clone(this.context);\n\n if (tryAppendExtension) {\n context.ext = importOptions.isPlugin ? '.js' : '.less';\n }\n\n if (importOptions.isPlugin) {\n context.mime = 'application/javascript';\n promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager);\n }\n else {\n promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment,\n (err, loadedFile) => {\n if (err) {\n fileParsedFunc(err);\n } else {\n loadFileCallback(loadedFile);\n }\n });\n }\n if (promise) {\n promise.then(loadFileCallback, fileParsedFunc);\n }\n }\n }\n\n return ImportManager;\n};\n","let PromiseConstructor;\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const render = function (input, options, callback) {\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n render.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n this.parse(input, options, (err, root, imports, options) => {\n if (err) { return callback(err); }\n\n let result;\n try {\n const parseTree = new ParseTree(root, imports);\n result = parseTree.toCSS(options);\n }\n catch (err) { return callback(err); }\n\n callback(null, result);\n });\n }\n };\n\n return render;\n};\n","/**\n * Plugin Manager\n */\nclass PluginManager {\n constructor(less) {\n this.less = less;\n this.visitors = [];\n this.preProcessors = [];\n this.postProcessors = [];\n this.installedPlugins = [];\n this.fileManagers = [];\n this.iterator = -1;\n this.pluginCache = {};\n this.Loader = new less.PluginLoader(less);\n }\n\n /**\n * Adds all the plugins in the array\n * @param {Array} plugins\n */\n addPlugins(plugins) {\n if (plugins) {\n for (let i = 0; i < plugins.length; i++) {\n this.addPlugin(plugins[i]);\n }\n }\n }\n\n /**\n *\n * @param plugin\n * @param {String} filename\n */\n addPlugin(plugin, filename, functionRegistry) {\n this.installedPlugins.push(plugin);\n if (filename) {\n this.pluginCache[filename] = plugin;\n }\n if (plugin.install) {\n plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry);\n }\n }\n\n /**\n *\n * @param filename\n */\n get(filename) {\n return this.pluginCache[filename];\n }\n\n /**\n * Adds a visitor. The visitor object has options on itself to determine\n * when it should run.\n * @param visitor\n */\n addVisitor(visitor) {\n this.visitors.push(visitor);\n }\n\n /**\n * Adds a pre processor object\n * @param {object} preProcessor\n * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import\n */\n addPreProcessor(preProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) {\n if (this.preProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.preProcessors.splice(indexToInsertAt, 0, {preProcessor, priority});\n }\n\n /**\n * Adds a post processor object\n * @param {object} postProcessor\n * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression\n */\n addPostProcessor(postProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) {\n if (this.postProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.postProcessors.splice(indexToInsertAt, 0, {postProcessor, priority});\n }\n\n /**\n *\n * @param manager\n */\n addFileManager(manager) {\n this.fileManagers.push(manager);\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPreProcessors() {\n const preProcessors = [];\n for (let i = 0; i < this.preProcessors.length; i++) {\n preProcessors.push(this.preProcessors[i].preProcessor);\n }\n return preProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPostProcessors() {\n const postProcessors = [];\n for (let i = 0; i < this.postProcessors.length; i++) {\n postProcessors.push(this.postProcessors[i].postProcessor);\n }\n return postProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getVisitors() {\n return this.visitors;\n }\n\n visitor() {\n const self = this;\n return {\n first: function() {\n self.iterator = -1;\n return self.visitors[self.iterator];\n },\n get: function() {\n self.iterator += 1;\n return self.visitors[self.iterator];\n }\n };\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getFileManagers() {\n return this.fileManagers;\n }\n}\n\nlet pm;\n\nconst PluginManagerFactory = (less, newFactory) => {\n if (newFactory || !pm) {\n pm = new PluginManager(less);\n }\n return pm;\n };\n\n//\nexport default PluginManagerFactory;\n","let PromiseConstructor;\nimport contexts from './contexts';\nimport Parser from './parser/parser';\nimport PluginManager from './plugin-manager';\nimport LessError from './less-error';\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const parse = function (input, options, callback) {\n\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n parse.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n let context;\n let rootFileInfo;\n const pluginManager = new PluginManager(this, !options.reUsePluginManager);\n\n options.pluginManager = pluginManager;\n\n context = new contexts.Parse(options);\n\n if (options.rootFileInfo) {\n rootFileInfo = options.rootFileInfo;\n } else {\n const filename = options.filename || 'input';\n const entryPath = filename.replace(/[^\\/\\\\]*$/, '');\n rootFileInfo = {\n filename,\n rewriteUrls: context.rewriteUrls,\n rootpath: context.rootpath || '',\n currentDirectory: entryPath,\n entryPath,\n rootFilename: filename\n };\n // add in a missing trailing slash\n if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') {\n rootFileInfo.rootpath += '/';\n }\n }\n\n const imports = new ImportManager(this, context, rootFileInfo);\n this.importManager = imports;\n\n // TODO: allow the plugins to be just a list of paths or names\n // Do an async plugin queue like lessc\n\n if (options.plugins) {\n options.plugins.forEach(plugin => {\n let evalResult;\n let contents;\n if (plugin.fileContent) {\n contents = plugin.fileContent.replace(/^\\uFEFF/, '');\n evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename);\n if (evalResult instanceof LessError) {\n return callback(evalResult);\n }\n }\n else {\n pluginManager.addPlugin(plugin);\n }\n });\n }\n\n new Parser(context, imports, rootFileInfo)\n .parse(input, (e, root) => {\n if (e) { return callback(e); }\n callback(null, root, imports, options);\n }, options);\n }\n };\n return parse;\n};\n","import data from './data';\nimport tree from './tree';\nimport Environment from './environment/environment';\nimport AbstractFileManager from './environment/abstract-file-manager';\nimport AbstractPluginLoader from './environment/abstract-plugin-loader';\nimport visitors from './visitors';\nimport Parser from './parser/parser';\nimport Functions from './functions';\nimport contexts from './contexts';\nimport sourceMapOutput from './source-map-output';\nimport sourceMapBuilder from './source-map-builder';\nimport parseTree from './parse-tree';\nimport importManager from './import-manager';\nimport Render from './render';\nimport Parse from './parse';\nimport LessError from './less-error';\nimport transformTree from './transform-tree';\nimport * as utils from './utils';\nimport PluginManager from './plugin-manager';\nimport logger from './logger';\n\nexport default (environment, fileManagers) => {\n const SourceMapOutput = sourceMapOutput(environment);\n const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment);\n const ParseTree = parseTree(SourceMapBuilder);\n const ImportManager = importManager(environment);\n const render = Render(environment, ParseTree, ImportManager);\n const parse = Parse(environment, ParseTree, ImportManager);\n const environ = new Environment(environment, fileManagers);\n const functions = Functions(environment);\n\n const initial = {\n version: [3, 9, 0],\n data,\n tree,\n Environment,\n AbstractFileManager,\n AbstractPluginLoader,\n environment: environ,\n visitors,\n Parser,\n functions,\n contexts,\n SourceMapOutput,\n SourceMapBuilder,\n ParseTree,\n ImportManager,\n render,\n parse,\n LessError,\n transformTree,\n utils,\n PluginManager,\n logger\n };\n\n // Create a public API\n\n const ctor = t => (function(...args) {\n const obj = Object.create(t.prototype);\n t.apply(obj, Array.prototype.slice.call(args, 0));\n return obj;\n });\n let t;\n const api = Object.create(initial);\n for (const n in initial.tree) {\n /* eslint guard-for-in: 0 */\n t = initial.tree[n];\n if (typeof t === 'function') {\n api[n.toLowerCase()] = ctor(t);\n }\n else {\n api[n] = Object.create(null);\n for (const o in t) {\n /* eslint guard-for-in: 0 */\n api[n][o.toLowerCase()] = ctor(t[o]);\n }\n }\n }\n\n return api;\n};\n","/* global window, XMLHttpRequest */\n\nexport default (options, logger) => {\n\n const AbstractFileManager = require('../less/environment/abstract-file-manager.js');\n\n let fileCache = {};\n\n // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load\n const FileManager = () => {\n };\n\n FileManager.prototype = new AbstractFileManager();\n\n FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() {\n return true;\n };\n FileManager.prototype.join = function join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return this.extractUrlParts(laterPath, basePath).path;\n };\n FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) {\n\n const xhr = new XMLHttpRequest();\n const async = options.isFileProtocol ? options.fileAsync : true;\n\n if (typeof xhr.overrideMimeType === 'function') {\n xhr.overrideMimeType('text/css');\n }\n logger.debug(`XHR: Getting '${url}'`);\n xhr.open('GET', url, async);\n xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');\n xhr.send(null);\n\n function handleResponse(xhr, callback, errback) {\n if (xhr.status >= 200 && xhr.status < 300) {\n callback(xhr.responseText,\n xhr.getResponseHeader('Last-Modified'));\n } else if (typeof errback === 'function') {\n errback(xhr.status, url);\n }\n }\n\n if (options.isFileProtocol && !options.fileAsync) {\n if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {\n callback(xhr.responseText);\n } else {\n errback(xhr.status, url);\n }\n } else if (async) {\n xhr.onreadystatechange = () => {\n if (xhr.readyState == 4) {\n handleResponse(xhr, callback, errback);\n }\n };\n } else {\n handleResponse(xhr, callback, errback);\n }\n };\n FileManager.prototype.supports = (filename, currentDirectory, options, environment) => true;\n\n FileManager.prototype.clearFileCache = () => {\n fileCache = {};\n };\n\n FileManager.prototype.loadFile = function loadFile(filename, currentDirectory, options, environment) {\n // TODO: Add prefix support like less-node?\n // What about multiple paths?\n\n if (currentDirectory && !this.isPathAbsolute(filename)) {\n filename = currentDirectory + filename;\n }\n\n filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename;\n\n options = options || {};\n\n // sheet may be set to the stylesheet for the initial load or a collection of properties including\n // some context variables for imports\n const hrefParts = this.extractUrlParts(filename, window.location.href);\n const href = hrefParts.url;\n const self = this;\n \n return new Promise((resolve, reject) => {\n if (options.useFileCache && fileCache[href]) {\n try {\n const lessText = fileCache[href];\n return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }});\n } catch (e) {\n return reject({ filename: href, message: `Error loading file ${href} error was ${e.message}` });\n }\n }\n\n self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) {\n // per file cache\n fileCache[href] = data;\n\n // Use remote copy (re-parse)\n resolve({ contents: data, filename: href, webInfo: { lastModified }});\n }, function doXHRError(status, url) {\n reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href });\n });\n });\n };\n\n return FileManager;\n};\n","// TODO: Add tests for browser @plugin\n/* global window */\n\nimport AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js';\n\n/**\n * Browser Plugin Loader\n */\nclass PluginLoader extends AbstractPluginLoader {\n constructor(less) {\n this.less = less;\n // Should we shim this.require for browser? Probably not?\n }\n\n loadPlugin(filename, basePath, context, environment, fileManager) {\n return new Promise((fulfill, reject) => {\n fileManager.loadFile(filename, basePath, context, environment)\n .then(fulfill).catch(reject);\n });\n }\n}\n\nexport default PluginLoader;\n\n","export default (less, options) => {\n const logLevel_debug = 4;\n const logLevel_info = 3;\n const logLevel_warn = 2;\n const logLevel_error = 1;\n\n // The amount of logging in the javascript console.\n // 3 - Debug, information and errors\n // 2 - Information and errors\n // 1 - Errors\n // 0 - None\n // Defaults to 2\n options.logLevel = typeof options.logLevel !== 'undefined' ? options.logLevel : (options.env === 'development' ? logLevel_info : logLevel_error);\n\n if (!options.loggers) {\n options.loggers = [{\n debug: function(msg) {\n if (options.logLevel >= logLevel_debug) {\n console.log(msg);\n }\n },\n info: function(msg) {\n if (options.logLevel >= logLevel_info) {\n console.log(msg);\n }\n },\n warn: function(msg) {\n if (options.logLevel >= logLevel_warn) {\n console.warn(msg);\n }\n },\n error: function(msg) {\n if (options.logLevel >= logLevel_error) {\n console.error(msg);\n }\n }\n }];\n }\n for (let i = 0; i < options.loggers.length; i++) {\n less.logger.addListener(options.loggers[i]);\n }\n};\n","import * as utils from './utils';\nimport browser from './browser';\n\nexport default (window, less, options) => {\n\n function errorHTML(e, rootHref) {\n const id = `less-error-message:${utils.extractId(rootHref || '')}`;\n const template = '
  • {content}
    • ';\n const elem = window.document.createElement('div');\n let timer;\n let content;\n const errors = [];\n const filename = e.filename || rootHref;\n const filenameNoPath = filename.match(/([^\\/]+(\\?.*)?)$/)[1];\n\n elem.id = id;\n elem.className = 'less-error-message';\n\n content = `

    ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}

    in ${filenameNoPath} `;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += `on line ${e.line}, column ${e.column + 1}:

      ${errors.join('')}
    `;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `
    Stack Trace
    ${e.stack.split('\\n').slice(1).join('
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a,b,c,d=this.entities;return(a=d.variableCurly())||(a=l(/^(?:[_A-Za-z0-9-\*]*\|)?(?:[_A-Za-z0-9-]|\\.)+/)),c=q.$re(/^[|~*$^]?=/),c&&(b=d.quoted()||q.$re(/^[0-9]+%/)||q.$re(/^[\w-]+/)||d.variableCurly()),m("]"),new e.Attribute(a,c,b)}},block:function(){var a;if(q.$char("{")&&(a=this.primary())&&q.$char("}"))return a},blockRuleset:function(){var a=this.block();return a&&(a=new e.Ruleset(null,a)),a},detachedRuleset:function(){var a,b,c;if(q.save(),q.$re(/^[.#]\(/)&&(a=this.mixin.args(!1),b=a.args,c=a.variadic,!q.$char(")")))return void q.restore();var d=this.blockRuleset();return d?(q.forget(),b?new e.mixin.Definition(null,b,d,null,c):new e.DetachedRuleset(d)):void q.restore()},ruleset:function(){var b,c,d;if(q.save(),a.dumpLineNumbers&&(d=n(q.i)),b=this.selectors(),b&&(c=this.block())){q.forget();var f=new e.Ruleset(b,c,a.strictImports);return a.dumpLineNumbers&&(f.debugInfo=d),f}q.restore()},declaration:function(){var a,b,d,f,g,h,i=q.i,j=q.currentChar();if("."!==j&&"#"!==j&&"&"!==j&&":"!==j)if(q.save(),a=this.variable()||this.ruleProperty()){if(h="string"==typeof a,h&&(b=this.detachedRuleset(),b&&(d=!0)),q.commentStore.length=0,!b){if(g=!h&&a.length>1&&a.pop().value,b=a[0].value&&"--"===a[0].value.slice(0,2)?this.permissiveValue():this.anonymousValue())return q.forget(),new e.Declaration(a,b,(!1),g,i,c);b||(b=this.value()),b?f=this.important():h&&(b=this.permissiveValue())}if(b&&(this.end()||d))return q.forget(),new e.Declaration(a,b,f,g,i,c);q.restore()}else q.restore()},anonymousValue:function(){var a=q.i,b=q.$re(/^([^.#@\$+\/'"*`(;{}-]*);/);if(b)return new e.Anonymous(b[1],a)},permissiveValue:function(a){function b(){var a=q.currentChar();return"string"==typeof i?a===i:i.test(a)}var d,f,g,h,i=a||";",k=q.i,l=[];if(!b()){h=[];do f=this.comment(),f?h.push(f):(f=this.entity(),f&&h.push(f));while(f);if(g=b(),h.length>0){if(h=new e.Expression(h),g)return h;l.push(h)," "===q.prevChar()&&l.push(new e.Anonymous(" ",k))}if(q.save(),h=q.$parseUntil(i)){if("string"==typeof h&&j("Expected '"+h+"'","Parse"),1===h.length&&" "===h[0])return q.forget(),new e.Anonymous("",k);var m;for(d=0;d0)return new e.Expression(f)},mediaFeatures:function(){var a,b=this.entities,c=[];do if(a=this.mediaFeature()){if(c.push(a),!q.$char(","))break}else if(a=b.variable()||b.mixinLookup(),a&&(c.push(a),!q.$char(",")))break;while(a);return c.length>0?c:null},media:function(){var b,d,f,g,h=q.i;return a.dumpLineNumbers&&(g=n(h)),q.save(),q.$str("@media")?(b=this.mediaFeatures(),d=this.block(),d||j("media definitions require block statements after any features"),q.forget(),f=new e.Media(d,b,h,c),a.dumpLineNumbers&&(f.debugInfo=g),f):void q.restore()},plugin:function(){var a,b,d,f=q.i,g=q.$re(/^@plugin?\s+/);if(g){if(b=this.pluginArgs(),d=b?{pluginArgs:b,isPlugin:!0}:{isPlugin:!0},a=this.entities.quoted()||this.entities.url())return q.$char(";")||(q.i=f,j("missing semi-colon on @plugin")),new e.Import(a,null,d,f,c);q.i=f,j("malformed @plugin statement")}},pluginArgs:function(){if(q.save(),!q.$char("("))return q.restore(),null;var a=q.$re(/^\s*([^\);]+)\)\s*/);return a[1]?(q.forget(),a[1].trim()):(q.restore(),null)},atrule:function(){var b,d,f,g,h,i,k,l=q.i,m=!0,o=!0;if("@"===q.currentChar()){if(d=this["import"]()||this.plugin()||this.media())return d;if(q.save(),b=q.$re(/^@[a-z-]+/)){switch(g=b,"-"==b.charAt(1)&&b.indexOf("-",2)>0&&(g="@"+b.slice(b.indexOf("-",2)+1)),g){case"@charset":h=!0,m=!1;break;case"@namespace":i=!0,m=!1;break;case"@keyframes":case"@counter-style":h=!0;break;case"@document":case"@supports":k=!0,o=!1;break;default:k=!0}return q.commentStore.length=0,h?(d=this.entity(),d||j("expected "+b+" identifier")):i?(d=this.expression(),d||j("expected "+b+" expression")):k&&(d=this.permissiveValue(/^[{;]/),m="{"===q.currentChar(),d?d.value||(d=null):m||";"===q.currentChar()||j(b+" rule is missing block or ending 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a,b,c,d,f;if(a=this.multiplication()){for(f=q.isWhitespace(-1);;){if(c=q.$re(/^[-+]\s+/)||!f&&(q.$char("+")||q.$char("-")),!c)break;if(b=this.multiplication(),!b)break;a.parensInOp=!0,b.parensInOp=!0,d=new e.Operation(c,[d||a,b],f),f=q.isWhitespace(-1)}return d||a}},conditions:function(){var a,b,c,d=q.i;if(a=this.condition(!0)){for(;;){if(!q.peek(/^,\s*(not\s*)?\(/)||!q.$char(","))break;if(b=this.condition(!0),!b)break;c=new e.Condition("or",c||a,b,d)}return c||a}},condition:function(a){function b(){return q.$str("or")}var c,d,f;if(c=this.conditionAnd(a)){if(d=b()){if(f=this.condition(a),!f)return;c=new e.Condition(d,c,f)}return c}},conditionAnd:function(a){function b(){var b=h.negatedCondition(a)||h.parenthesisCondition(a);return b||a?b:h.atomicCondition(a)}function c(){return q.$str("and")}var d,f,g,h=this;if(d=b()){if(f=c()){if(g=this.conditionAnd(a),!g)return;d=new e.Condition(f,d,g)}return d}},negatedCondition:function(a){if(q.$str("not")){var b=this.parenthesisCondition(a);return b&&(b.negate=!b.negate),b}},parenthesisCondition:function(a){function b(b){var c;return q.save(),(c=b.condition(a))&&q.$char(")")?(q.forget(),c):void q.restore()}var c;return q.save(),q.$str("(")?(c=b(this))?(q.forget(),c):(c=this.atomicCondition(a))?q.$char(")")?(q.forget(),c):void q.restore("expected ')' got '"+q.currentChar()+"'"):void q.restore():void q.restore()},atomicCondition:function(a){function b(){return this.addition()||h.keyword()||h.quoted()||h.mixinLookup()}var c,d,f,g,h=this.entities,i=q.i;if(b=b.bind(this),c=b())return q.$char(">")?g=q.$char("=")?">=":">":q.$char("<")?g=q.$char("=")?"<=":"<":q.$char("=")&&(g=q.$char(">")?"=>":q.$char("<")?"=<":"="),g?(d=b(),d?f=new e.Condition(g,c,d,i,(!1)):j("expected expression")):f=new e.Condition("=",c,new e.Keyword("true"),i,(!1)),f},operand:function(){var a,b=this.entities;q.peek(/^-[@\$\(]/)&&(a=q.$char("-"));var c=this.sub()||b.dimension()||b.color()||b.variable()||b.property()||b.call()||b.quoted(!0)||b.colorKeyword()||b.mixinLookup();return a&&(c.parensInOp=!0,c=new e.Negative(c)),c},expression:function(){var a,b,c=[],d=q.i;do a=this.comment(),a?c.push(a):(a=this.addition()||this.entity(),a&&(c.push(a),q.peek(/^\/[\/*]/)||(b=q.$char("/"),b&&c.push(new e.Anonymous(b,d)))));while(a);if(c.length>0)return new e.Expression(c)},property:function(){var a=q.$re(/^(\*?-?[_a-zA-Z0-9-]+)\s*:/);if(a)return a[1]},ruleProperty:function(){function a(a){var b=q.i,c=q.$re(a);if(c)return g.push(b),f.push(c[1])}var b,d,f=[],g=[];q.save();var h=q.$re(/^([_a-zA-Z0-9-]+)\s*:/);if(h)return f=[new e.Keyword(h[1])],q.forget(),f;for(a(/^(\*?)/);;)if(!a(/^((?:[\w-]+)|(?:[@\$]\{[\w-]+\}))/))break;if(f.length>1&&a(/^((?:\+_|\+)?)\s*:/)){for(q.forget(),""===f[0]&&(f.shift(),g.shift()),d=0;d=b);c++);this.preProcessors.splice(c,0,{preProcessor:a,priority:b})},e.prototype.addPostProcessor=function(a,b){var c;for(c=0;c=b);c++);this.postProcessors.splice(c,0,{postProcessor:a,priority:b})},e.prototype.addFileManager=function(a){this.fileManagers.push(a)},e.prototype.getPreProcessors=function(){for(var a=[],b=0;b0){var d,e=JSON.stringify(this._sourceMapGenerator.toJSON());this.sourceMapURL?d=this.sourceMapURL:this._sourceMapFilename&&(d=this._sourceMapFilename),this.sourceMapURL=d,this.sourceMap=e}return this._css.join("")},b}},{}],49:[function(a,b,c){var d=a("./contexts"),e=a("./visitors"),f=a("./tree");b.exports=function(a,b){b=b||{};var c,g=b.variables,h=new d.Eval(b);"object"!=typeof g||Array.isArray(g)||(g=Object.keys(g).map(function(a){var b=g[a];return b instanceof f.Value||(b instanceof f.Expression||(b=new f.Expression([b])),b=new f.Value([b])),new f.Declaration("@"+a,b,(!1),null,0)}),h.frames=[new f.Ruleset(null,g)]);var i,j,k=[new e.JoinSelectorVisitor,new e.MarkVisibleSelectorsVisitor((!0)),new e.ExtendVisitor,new e.ToCSSVisitor({compress:Boolean(b.compress)})],l=[];if(b.pluginManager){j=b.pluginManager.visitor();for(var m=0;m<2;m++)for(j.first();i=j.get();)i.isPreEvalVisitor?0!==m&&l.indexOf(i)!==-1||(l.push(i),i.run(a)):0!==m&&k.indexOf(i)!==-1||(i.isPreVisitor?k.unshift(i):k.push(i))}c=a.eval(h);for(var m=0;m=6?(this.rgb=[],a.match(/.{2}/g).map(function(a,b){b<3?d.rgb.push(parseInt(a,16)):d.alpha=parseInt(a,16)/255})):(this.rgb=[],a.split("").map(function(a,b){b<3?d.rgb.push(parseInt(a+a,16)):d.alpha=parseInt(a+a,16)/255})),this.alpha=this.alpha||("number"==typeof b?b:1),"undefined"!=typeof c&&(this.value=c)};h.prototype=new f,h.prototype.type="Color",h.prototype.luma=function(){var a=this.rgb[0]/255,b=this.rgb[1]/255,c=this.rgb[2]/255;return a=a<=.03928?a/12.92:Math.pow((a+.055)/1.055,2.4),b=b<=.03928?b/12.92:Math.pow((b+.055)/1.055,2.4),c=c<=.03928?c/12.92:Math.pow((c+.055)/1.055,2.4),.2126*a+.7152*b+.0722*c},h.prototype.genCSS=function(a,b){b.add(this.toCSS(a))},h.prototype.toCSS=function(a,b){var c,e,f,g=a&&a.compress&&!b,h=[];if(e=this.fround(a,this.alpha),this.value)if(0===this.value.indexOf("rgb"))e<1&&(f="rgba");else{if(0!==this.value.indexOf("hsl"))return this.value;f=e<1?"hsla":"hsl"}else e<1&&(f="rgba");switch(f){case"rgba":h=this.rgb.map(function(a){return d(Math.round(a),255)}).concat(d(e,1));break;case"hsla":h.push(d(e,1));case"hsl":c=this.toHSL(),h=[this.fround(a,c.h),this.fround(a,100*c.s)+"%",this.fround(a,100*c.l)+"%"].concat(h)}if(f)return f+"("+h.join(","+(g?"":" "))+")";if(c=this.toRGB(),g){var i=c.split("");i[1]===i[2]&&i[3]===i[4]&&i[5]===i[6]&&(c="#"+i[1]+i[3]+i[5])}return c},h.prototype.operate=function(a,b,c){for(var d=new Array(3),e=this.alpha*(1-c.alpha)+c.alpha,f=0;f<3;f++)d[f]=this._operate(a,b,this.rgb[f],c.rgb[f]);return new h(d,e)},h.prototype.toRGB=function(){return e(this.rgb)},h.prototype.toHSL=function(){var a,b,c=this.rgb[0]/255,d=this.rgb[1]/255,e=this.rgb[2]/255,f=this.alpha,g=Math.max(c,d,e),h=Math.min(c,d,e),i=(g+h)/2,j=g-h;if(g===h)a=b=0;else{switch(b=i>.5?j/(2-g-h):j/(g+h),g){case c:a=(d-e)/j+(d="===a||"=<"===a||"<="===a;case 1:return">"===a||">="===a;default:return!1}}}(this.op,this.lvalue.eval(a),this.rvalue.eval(a));return this.negate?!b:b},b.exports=e},{"./node":76}],59:[function(a,b,c){var d=function(a,b,c){var e="";if(a.dumpLineNumbers&&!a.compress)switch(a.dumpLineNumbers){case"comments":e=d.asComment(b);break;case"mediaquery":e=d.asMediaQuery(b);break;case"all":e=d.asComment(b)+(c||"")+d.asMediaQuery(b)}return e};d.asComment=function(a){return"/* line "+a.debugInfo.lineNumber+", "+a.debugInfo.fileName+" */\n"},d.asMediaQuery=function(a){var b=a.debugInfo.fileName;return/^[a-z]+:\/\//i.test(b)||(b="file://"+b),"@media -sass-debug-info{filename{font-family:"+b.replace(/([.:\/\\])/g,function(a){return"\\"==a&&(a="/"),"\\"+a})+"}line{font-family:\\00003"+a.debugInfo.lineNumber+"}}\n"},b.exports=d},{}],60:[function(a,b,c){function d(a,b){var c,d="",e=b.length,f={add:function(a){d+=a}};for(c=0;c-1e-6&&(d=c.toFixed(20).replace(/0+$/,"")),a&&a.compress){if(0===c&&this.unit.isLength())return void b.add(d);c>0&&c<1&&(d=d.substr(1))}b.add(d),this.unit.genCSS(a,b)},h.prototype.operate=function(a,b,c){var d=this._operate(a,b,this.value,c.value),e=this.unit.clone();if("+"===b||"-"===b)if(0===e.numerator.length&&0===e.denominator.length)e=c.unit.clone(),this.unit.backupUnit&&(e.backupUnit=this.unit.backupUnit);else if(0===c.unit.numerator.length&&0===e.denominator.length);else{if(c=c.convertTo(this.unit.usedUnits()),a.strictUnits&&c.unit.toString()!==e.toString())throw new Error("Incompatible units. Change the units or use the unit function. Bad units: '"+e.toString()+"' and '"+c.unit.toString()+"'.");d=this._operate(a,b,this.value,c.value)}else"*"===b?(e.numerator=e.numerator.concat(c.unit.numerator).sort(),e.denominator=e.denominator.concat(c.unit.denominator).sort(),e.cancel()):"/"===b&&(e.numerator=e.numerator.concat(c.unit.denominator).sort(),e.denominator=e.denominator.concat(c.unit.numerator).sort(),e.cancel());return new h(d,e)},h.prototype.compare=function(a){var b,c;if(a instanceof h){if(this.unit.isEmpty()||a.unit.isEmpty())b=this,c=a;else if(b=this.unify(),c=a.unify(),0!==b.unit.compare(c.unit))return;return d.numericCompare(b.value,c.value)}},h.prototype.unify=function(){return this.convertTo({length:"px",duration:"s",angle:"rad"})},h.prototype.convertTo=function(a){var b,c,d,f,g,i=this.value,j=this.unit.clone(),k={};if("string"==typeof a){for(b in e)e[b].hasOwnProperty(a)&&(k={},k[b]=a);a=k}g=function(a,b){return d.hasOwnProperty(a)?(b?i/=d[a]/d[f]:i*=d[a]/d[f],f):a};for(c in a)a.hasOwnProperty(c)&&(f=a[c],d=e[c],j.map(g));return j.cancel(),new h(i,j)},b.exports=h},{"../data/unit-conversions":16,"./color":55,"./node":76,"./unit":84}],63:[function(a,b,c){var d=a("./node"),e=a("./paren"),f=a("./combinator"),g=function(a,b,c,d,e,g){this.combinator=a instanceof f?a:new f(a),this.value="string"==typeof b?b.trim():b?b:"",this.isVariable=c,this._index=d,this._fileInfo=e,this.copyVisibilityInfo(g),this.setParent(this.combinator,this)};g.prototype=new d,g.prototype.type="Element",g.prototype.accept=function(a){var b=this.value;this.combinator=a.visit(this.combinator),"object"==typeof b&&(this.value=a.visit(b))},g.prototype.eval=function(a){return new g(this.combinator,this.value.eval?this.value.eval(a):this.value,this.isVariable,this.getIndex(),this.fileInfo(),this.visibilityInfo())},g.prototype.clone=function(){return new 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style element is added to the DOM, otherwise IE 7 and 8 may crash.\n // See http://social.msdn.microsoft.com/Forums/en-US/7e081b65-878a-4c22-8e68-c10d39c2ed32/internet-explorer-crashes-appending-style-element-to-head\n if (styleNode.styleSheet) {\n try {\n styleNode.styleSheet.cssText = styles;\n } catch (e) {\n throw new Error('Couldn\\'t reassign styleSheet.cssText.');\n }\n }\n },\n currentScript: function(window) {\n const document = window.document;\n return document.currentScript || (() => {\n const scripts = document.getElementsByTagName('script');\n return scripts[scripts.length - 1];\n })();\n }\n};\n","export default {\n 'aliceblue':'#f0f8ff',\n 'antiquewhite':'#faebd7',\n 'aqua':'#00ffff',\n 'aquamarine':'#7fffd4',\n 'azure':'#f0ffff',\n 'beige':'#f5f5dc',\n 'bisque':'#ffe4c4',\n 'black':'#000000',\n 'blanchedalmond':'#ffebcd',\n 'blue':'#0000ff',\n 'blueviolet':'#8a2be2',\n 'brown':'#a52a2a',\n 'burlywood':'#deb887',\n 'cadetblue':'#5f9ea0',\n 'chartreuse':'#7fff00',\n 'chocolate':'#d2691e',\n 'coral':'#ff7f50',\n 'cornflowerblue':'#6495ed',\n 'cornsilk':'#fff8dc',\n 'crimson':'#dc143c',\n 'cyan':'#00ffff',\n 'darkblue':'#00008b',\n 'darkcyan':'#008b8b',\n 'darkgoldenrod':'#b8860b',\n 'darkgray':'#a9a9a9',\n 'darkgrey':'#a9a9a9',\n 'darkgreen':'#006400',\n 'darkkhaki':'#bdb76b',\n 'darkmagenta':'#8b008b',\n 'darkolivegreen':'#556b2f',\n 'darkorange':'#ff8c00',\n 'darkorchid':'#9932cc',\n 'darkred':'#8b0000',\n 'darksalmon':'#e9967a',\n 'darkseagreen':'#8fbc8f',\n 'darkslateblue':'#483d8b',\n 'darkslategray':'#2f4f4f',\n 'darkslategrey':'#2f4f4f',\n 'darkturquoise':'#00ced1',\n 'darkviolet':'#9400d3',\n 'deeppink':'#ff1493',\n 'deepskyblue':'#00bfff',\n 'dimgray':'#696969',\n 'dimgrey':'#696969',\n 'dodgerblue':'#1e90ff',\n 'firebrick':'#b22222',\n 'floralwhite':'#fffaf0',\n 'forestgreen':'#228b22',\n 'fuchsia':'#ff00ff',\n 'gainsboro':'#dcdcdc',\n 'ghostwhite':'#f8f8ff',\n 'gold':'#ffd700',\n 'goldenrod':'#daa520',\n 'gray':'#808080',\n 'grey':'#808080',\n 'green':'#008000',\n 'greenyellow':'#adff2f',\n 'honeydew':'#f0fff0',\n 'hotpink':'#ff69b4',\n 'indianred':'#cd5c5c',\n 'indigo':'#4b0082',\n 'ivory':'#fffff0',\n 'khaki':'#f0e68c',\n 'lavender':'#e6e6fa',\n 'lavenderblush':'#fff0f5',\n 'lawngreen':'#7cfc00',\n 'lemonchiffon':'#fffacd',\n 'lightblue':'#add8e6',\n 'lightcoral':'#f08080',\n 'lightcyan':'#e0ffff',\n 'lightgoldenrodyellow':'#fafad2',\n 'lightgray':'#d3d3d3',\n 'lightgrey':'#d3d3d3',\n 'lightgreen':'#90ee90',\n 'lightpink':'#ffb6c1',\n 'lightsalmon':'#ffa07a',\n 'lightseagreen':'#20b2aa',\n 'lightskyblue':'#87cefa',\n 'lightslategray':'#778899',\n 'lightslategrey':'#778899',\n 'lightsteelblue':'#b0c4de',\n 'lightyellow':'#ffffe0',\n 'lime':'#00ff00',\n 'limegreen':'#32cd32',\n 'linen':'#faf0e6',\n 'magenta':'#ff00ff',\n 'maroon':'#800000',\n 'mediumaquamarine':'#66cdaa',\n 'mediumblue':'#0000cd',\n 'mediumorchid':'#ba55d3',\n 'mediumpurple':'#9370d8',\n 'mediumseagreen':'#3cb371',\n 'mediumslateblue':'#7b68ee',\n 'mediumspringgreen':'#00fa9a',\n 'mediumturquoise':'#48d1cc',\n 'mediumvioletred':'#c71585',\n 'midnightblue':'#191970',\n 'mintcream':'#f5fffa',\n 'mistyrose':'#ffe4e1',\n 'moccasin':'#ffe4b5',\n 'navajowhite':'#ffdead',\n 'navy':'#000080',\n 'oldlace':'#fdf5e6',\n 'olive':'#808000',\n 'olivedrab':'#6b8e23',\n 'orange':'#ffa500',\n 'orangered':'#ff4500',\n 'orchid':'#da70d6',\n 'palegoldenrod':'#eee8aa',\n 'palegreen':'#98fb98',\n 'paleturquoise':'#afeeee',\n 'palevioletred':'#d87093',\n 'papayawhip':'#ffefd5',\n 'peachpuff':'#ffdab9',\n 'peru':'#cd853f',\n 'pink':'#ffc0cb',\n 'plum':'#dda0dd',\n 'powderblue':'#b0e0e6',\n 'purple':'#800080',\n 'rebeccapurple':'#663399',\n 'red':'#ff0000',\n 'rosybrown':'#bc8f8f',\n 'royalblue':'#4169e1',\n 'saddlebrown':'#8b4513',\n 'salmon':'#fa8072',\n 'sandybrown':'#f4a460',\n 'seagreen':'#2e8b57',\n 'seashell':'#fff5ee',\n 'sienna':'#a0522d',\n 'silver':'#c0c0c0',\n 'skyblue':'#87ceeb',\n 'slateblue':'#6a5acd',\n 'slategray':'#708090',\n 'slategrey':'#708090',\n 'snow':'#fffafa',\n 'springgreen':'#00ff7f',\n 'steelblue':'#4682b4',\n 'tan':'#d2b48c',\n 'teal':'#008080',\n 'thistle':'#d8bfd8',\n 'tomato':'#ff6347',\n 'turquoise':'#40e0d0',\n 'violet':'#ee82ee',\n 'wheat':'#f5deb3',\n 'white':'#ffffff',\n 'whitesmoke':'#f5f5f5',\n 'yellow':'#ffff00',\n 'yellowgreen':'#9acd32'\n};","export default {\n length: {\n 'm': 1,\n 'cm': 0.01,\n 'mm': 0.001,\n 'in': 0.0254,\n 'px': 0.0254 / 96,\n 'pt': 0.0254 / 72,\n 'pc': 0.0254 / 72 * 12\n },\n duration: {\n 's': 1,\n 'ms': 0.001\n },\n angle: {\n 'rad': 1 / (2 * Math.PI),\n 'deg': 1 / 360,\n 'grad': 1 / 400,\n 'turn': 1\n }\n};","import colors from './colors';\nimport unitConversions from './unit-conversions';\n\nexport default { colors, unitConversions };\n","class Node {\n constructor() {\n this.parent = null;\n this.visibilityBlocks = undefined;\n this.nodeVisible = undefined;\n this.rootNode = null;\n this.parsed = null;\n\n const self = this;\n Object.defineProperty(this, 'currentFileInfo', {\n get: function() { return self.fileInfo(); }\n });\n Object.defineProperty(this, 'index', {\n get: function() { return self.getIndex(); }\n });\n\n }\n\n setParent(nodes, parent) {\n function set(node) {\n if (node && node instanceof Node) {\n node.parent = parent;\n }\n }\n if (Array.isArray(nodes)) {\n nodes.forEach(set);\n }\n else {\n set(nodes);\n }\n }\n\n getIndex() {\n return this._index || (this.parent && this.parent.getIndex()) || 0;\n }\n\n fileInfo() {\n return this._fileInfo || (this.parent && this.parent.fileInfo()) || {};\n }\n\n isRulesetLike() {\n return false;\n }\n\n toCSS(context) {\n const strs = [];\n this.genCSS(context, {\n add: function(chunk, fileInfo, index) {\n strs.push(chunk);\n },\n isEmpty: function () {\n return strs.length === 0;\n }\n });\n return strs.join('');\n }\n\n genCSS(context, output) {\n output.add(this.value);\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval() { return this; }\n\n _operate(context, op, a, b) {\n switch (op) {\n case '+': return a + b;\n case '-': return a - b;\n case '*': return a * b;\n case '/': return a / b;\n }\n }\n\n fround(context, value) {\n const precision = context && context.numPrecision;\n // add \"epsilon\" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded:\n return (precision) ? Number((value + 2e-16).toFixed(precision)) : value;\n }\n\n // Returns true if this node represents root of ast imported by reference\n blocksVisibility() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n return this.visibilityBlocks !== 0;\n }\n\n addVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks + 1;\n }\n\n removeVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks - 1;\n }\n\n // Turns on node visibility - if called node will be shown in output regardless\n // of whether it comes from import by reference or not\n ensureVisibility() {\n this.nodeVisible = true;\n }\n\n // Turns off node visibility - if called node will NOT be shown in output regardless\n // of whether it comes from import by reference or not\n ensureInvisibility() {\n this.nodeVisible = false;\n }\n\n // return values:\n // false - the node must not be visible\n // true - the node must be visible\n // undefined or null - the node has the same visibility as its parent\n isVisible() {\n return this.nodeVisible;\n }\n\n visibilityInfo() {\n return {\n visibilityBlocks: this.visibilityBlocks,\n nodeVisible: this.nodeVisible\n };\n }\n\n copyVisibilityInfo(info) {\n if (!info) {\n return;\n }\n this.visibilityBlocks = info.visibilityBlocks;\n this.nodeVisible = info.nodeVisible;\n }\n}\n\nNode.compare = (a, b) => {\n /* returns:\n -1: a < b\n 0: a = b\n 1: a > b\n and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */\n\n if ((a.compare) &&\n // for \"symmetric results\" force toCSS-based comparison\n // of Quoted or Anonymous if either value is one of those\n !(b.type === 'Quoted' || b.type === 'Anonymous')) {\n return a.compare(b);\n } else if (b.compare) {\n return -b.compare(a);\n } else if (a.type !== b.type) {\n return undefined;\n }\n\n a = a.value;\n b = b.value;\n if (!Array.isArray(a)) {\n return a === b ? 0 : undefined;\n }\n if (a.length !== b.length) {\n return undefined;\n }\n for (let i = 0; i < a.length; i++) {\n if (Node.compare(a[i], b[i]) !== 0) {\n return undefined;\n }\n }\n return 0;\n};\n\nNode.numericCompare = (a, b) => a < b ? -1\n : a === b ? 0\n : a > b ? 1 : undefined;\nexport default Node;\n","import Node from './node';\nimport colors from '../data/colors';\n\n//\n// RGB Colors - #ff0014, #eee\n//\nclass Color extends Node {\n constructor(rgb, a, originalForm) {\n const self = this;\n //\n // The end goal here, is to parse the arguments\n // into an integer triplet, such as `128, 255, 0`\n //\n // This facilitates operations and conversions.\n //\n if (Array.isArray(rgb)) {\n this.rgb = rgb;\n } else if (rgb.length >= 6) {\n this.rgb = [];\n rgb.match(/.{2}/g).map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c, 16));\n } else {\n self.alpha = (parseInt(c, 16)) / 255;\n }\n });\n } else {\n this.rgb = [];\n rgb.split('').map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c + c, 16));\n } else {\n self.alpha = (parseInt(c + c, 16)) / 255;\n }\n });\n }\n this.alpha = this.alpha || (typeof a === 'number' ? a : 1);\n if (typeof originalForm !== 'undefined') {\n this.value = originalForm;\n }\n }\n\n luma() {\n let r = this.rgb[0] / 255;\n let g = this.rgb[1] / 255;\n let b = this.rgb[2] / 255;\n\n r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4);\n g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4);\n b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4);\n\n return 0.2126 * r + 0.7152 * g + 0.0722 * b;\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context, doNotCompress) {\n const compress = context && context.compress && !doNotCompress;\n let color;\n let alpha;\n let colorFunction;\n let args = [];\n\n // `value` is set if this color was originally\n // converted from a named color string so we need\n // to respect this and try to output named color too.\n alpha = this.fround(context, this.alpha);\n\n if (this.value) {\n if (this.value.indexOf('rgb') === 0) {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n } else if (this.value.indexOf('hsl') === 0) {\n if (alpha < 1) {\n colorFunction = 'hsla';\n } else {\n colorFunction = 'hsl';\n }\n } else {\n return this.value;\n }\n } else {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n }\n\n switch (colorFunction) {\n case 'rgba':\n args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1));\n break;\n case 'hsla':\n args.push(clamp(alpha, 1));\n case 'hsl':\n color = this.toHSL();\n args = [\n this.fround(context, color.h),\n `${this.fround(context, color.s * 100)}%`,\n `${this.fround(context, color.l * 100)}%`\n ].concat(args);\n }\n\n if (colorFunction) {\n // Values are capped between `0` and `255`, rounded and zero-padded.\n return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`;\n }\n\n color = this.toRGB();\n\n if (compress) {\n const splitcolor = color.split('');\n\n // Convert color to short format\n if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) {\n color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`;\n }\n }\n\n return color;\n }\n\n //\n // Operations have to be done per-channel, if not,\n // channels will spill onto each other. Once we have\n // our result, in the form of an integer triplet,\n // we create a new Color node to hold the result.\n //\n operate(context, op, other) {\n const rgb = new Array(3);\n const alpha = this.alpha * (1 - other.alpha) + other.alpha;\n for (let c = 0; c < 3; c++) {\n rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]);\n }\n return new Color(rgb, alpha);\n }\n\n toRGB() {\n return toHex(this.rgb);\n }\n\n toHSL() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const l = (max + min) / 2;\n const d = max - min;\n\n if (max === min) {\n h = s = 0;\n } else {\n s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, l, a };\n }\n\n // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript\n toHSV() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const v = max;\n\n const d = max - min;\n if (max === 0) {\n s = 0;\n } else {\n s = d / max;\n }\n\n if (max === min) {\n h = 0;\n } else {\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, v, a };\n }\n\n toARGB() {\n return toHex([this.alpha * 255].concat(this.rgb));\n }\n\n compare(x) {\n return (x.rgb &&\n x.rgb[0] === this.rgb[0] &&\n x.rgb[1] === this.rgb[1] &&\n x.rgb[2] === this.rgb[2] &&\n x.alpha === this.alpha) ? 0 : undefined;\n }\n}\n\nColor.prototype.type = 'Color';\n\nfunction clamp(v, max) {\n return Math.min(Math.max(v, 0), max);\n}\n\nfunction toHex(v) {\n return `#${v.map(c => {\n c = clamp(Math.round(c), 255);\n return (c < 16 ? '0' : '') + c.toString(16);\n}).join('')}`;\n}\n\nColor.fromKeyword = keyword => {\n let c;\n const key = keyword.toLowerCase();\n if (colors.hasOwnProperty(key)) {\n c = new Color(colors[key].slice(1));\n }\n else if (key === 'transparent') {\n c = new Color([0, 0, 0], 0);\n }\n\n if (c) {\n c.value = keyword;\n return c;\n }\n};\nexport default Color;\n","import Node from './node';\n\nclass Paren extends Node {\n constructor(node) {\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n return new Paren(this.value.eval(context));\n }\n}\n\nParen.prototype.type = 'Paren';\nexport default Paren;\n","import Node from './node';\n\nclass Combinator extends Node {\n constructor(value) {\n if (value === ' ') {\n this.value = ' ';\n this.emptyOrWhitespace = true;\n } else {\n this.value = value ? value.trim() : '';\n this.emptyOrWhitespace = this.value === '';\n }\n }\n\n genCSS(context, output) {\n const spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' ';\n output.add(spaceOrEmpty + this.value + spaceOrEmpty);\n }\n}\n\nCombinator.prototype.type = 'Combinator';\nconst _noSpaceCombinators = {\n '': true,\n ' ': true,\n '|': true\n};\nexport default Combinator;\n","import Node from './node';\nimport Paren from './paren';\nimport Combinator from './combinator';\n\nclass Element extends Node {\n constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) {\n this.combinator = combinator instanceof Combinator ?\n combinator : new Combinator(combinator);\n\n if (typeof value === 'string') {\n this.value = value.trim();\n } else if (value) {\n this.value = value;\n } else {\n this.value = '';\n }\n this.isVariable = isVariable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.combinator, this);\n }\n\n accept(visitor) {\n const value = this.value;\n this.combinator = visitor.visit(this.combinator);\n if (typeof value === 'object') {\n this.value = visitor.visit(value);\n }\n }\n\n eval(context) {\n return new Element(this.combinator,\n this.value.eval ? this.value.eval(context) : this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n clone() {\n return new Element(this.combinator,\n this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context), this.fileInfo(), this.getIndex());\n }\n\n toCSS(context = {}) {\n let value = this.value;\n const firstSelector = context.firstSelector;\n if (value instanceof Paren) {\n // selector in parens should not be affected by outer selector\n // flags (breaks only interpolated selectors - see #1973)\n context.firstSelector = true;\n }\n value = value.toCSS ? value.toCSS(context) : value;\n context.firstSelector = firstSelector;\n if (value === '' && this.combinator.value.charAt(0) === '&') {\n return '';\n } else {\n return this.combinator.toCSS(context) + value;\n }\n }\n}\n\nElement.prototype.type = 'Element';\nexport default Element;\n","\nexport const Math = {\n ALWAYS: 0,\n PARENS_DIVISION: 1,\n PARENS: 2,\n STRICT_LEGACY: 3\n};\n\nexport const RewriteUrls = {\n OFF: 0,\n LOCAL: 1,\n ALL: 2\n};","var clone = (function() {\n'use strict';\n\nfunction _instanceof(obj, type) {\n return type != null && obj instanceof type;\n}\n\nvar nativeMap;\ntry {\n nativeMap = Map;\n} catch(_) {\n // maybe a reference error because no `Map`. Give it a dummy value that no\n // value will ever be an instanceof.\n nativeMap = function() {};\n}\n\nvar nativeSet;\ntry {\n nativeSet = Set;\n} catch(_) {\n nativeSet = function() {};\n}\n\nvar nativePromise;\ntry {\n nativePromise = Promise;\n} catch(_) {\n nativePromise = function() {};\n}\n\n/**\n * Clones (copies) an Object using deep copying.\n *\n * This function supports circular references by default, but if you are certain\n * there are no circular references in your object, you can save some CPU time\n * by calling clone(obj, false).\n *\n * Caution: if `circular` is false and `parent` contains circular references,\n * your program may enter an infinite loop and crash.\n *\n * @param `parent` - the object to be cloned\n * @param `circular` - set to true if the object to be cloned may contain\n * circular references. (optional - true by default)\n * @param `depth` - set to a number if the object is only to be cloned to\n * a particular depth. (optional - defaults to Infinity)\n * @param `prototype` - sets the prototype to be used when cloning an object.\n * (optional - defaults to parent prototype).\n * @param `includeNonEnumerable` - set to true if the non-enumerable properties\n * should be cloned as well. Non-enumerable properties on the prototype\n * chain will be ignored. (optional - false by default)\n*/\nfunction clone(parent, circular, depth, prototype, includeNonEnumerable) {\n if (typeof circular === 'object') {\n depth = circular.depth;\n prototype = circular.prototype;\n includeNonEnumerable = circular.includeNonEnumerable;\n circular = circular.circular;\n }\n // maintain two arrays for circular references, where corresponding parents\n // and children have the same index\n var allParents = [];\n var allChildren = [];\n\n var useBuffer = typeof Buffer != 'undefined';\n\n if (typeof circular == 'undefined')\n circular = true;\n\n if (typeof depth == 'undefined')\n depth = Infinity;\n\n // recurse this function so we don't reset allParents and allChildren\n function _clone(parent, depth) {\n // cloning null always returns null\n if (parent === null)\n return null;\n\n if (depth === 0)\n return parent;\n\n var child;\n var proto;\n if (typeof parent != 'object') {\n return parent;\n }\n\n if (_instanceof(parent, nativeMap)) {\n child = new nativeMap();\n } else if (_instanceof(parent, nativeSet)) {\n child = new nativeSet();\n } else if (_instanceof(parent, nativePromise)) {\n child = new nativePromise(function (resolve, reject) {\n parent.then(function(value) {\n resolve(_clone(value, depth - 1));\n }, function(err) {\n reject(_clone(err, depth - 1));\n });\n });\n } else if (clone.__isArray(parent)) {\n child = [];\n } else if (clone.__isRegExp(parent)) {\n child = new RegExp(parent.source, __getRegExpFlags(parent));\n if (parent.lastIndex) child.lastIndex = parent.lastIndex;\n } else if (clone.__isDate(parent)) {\n child = new Date(parent.getTime());\n } else if (useBuffer && Buffer.isBuffer(parent)) {\n if (Buffer.allocUnsafe) {\n // Node.js >= 4.5.0\n child = Buffer.allocUnsafe(parent.length);\n } else {\n // Older Node.js versions\n child = new Buffer(parent.length);\n }\n parent.copy(child);\n return child;\n } else if (_instanceof(parent, Error)) {\n child = Object.create(parent);\n } else {\n if (typeof prototype == 'undefined') {\n proto = Object.getPrototypeOf(parent);\n child = Object.create(proto);\n }\n else {\n child = Object.create(prototype);\n proto = prototype;\n }\n }\n\n if (circular) {\n var index = allParents.indexOf(parent);\n\n if (index != -1) {\n return allChildren[index];\n }\n allParents.push(parent);\n allChildren.push(child);\n }\n\n if (_instanceof(parent, nativeMap)) {\n parent.forEach(function(value, key) {\n var keyChild = _clone(key, depth - 1);\n var valueChild = _clone(value, depth - 1);\n child.set(keyChild, valueChild);\n });\n }\n if (_instanceof(parent, nativeSet)) {\n parent.forEach(function(value) {\n var entryChild = _clone(value, depth - 1);\n child.add(entryChild);\n });\n }\n\n for (var i in parent) {\n var attrs;\n if (proto) {\n attrs = Object.getOwnPropertyDescriptor(proto, i);\n }\n\n if (attrs && attrs.set == null) {\n continue;\n }\n child[i] = _clone(parent[i], depth - 1);\n }\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(parent);\n for (var i = 0; i < symbols.length; i++) {\n // Don't need to worry about cloning a symbol because it is a primitive,\n // like a number or string.\n var symbol = symbols[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, symbol);\n if (descriptor && !descriptor.enumerable && !includeNonEnumerable) {\n continue;\n }\n child[symbol] = _clone(parent[symbol], depth - 1);\n if (!descriptor.enumerable) {\n Object.defineProperty(child, symbol, {\n enumerable: false\n });\n }\n }\n }\n\n if (includeNonEnumerable) {\n var allPropertyNames = Object.getOwnPropertyNames(parent);\n for (var i = 0; i < allPropertyNames.length; i++) {\n var propertyName = allPropertyNames[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, propertyName);\n if (descriptor && descriptor.enumerable) {\n continue;\n }\n child[propertyName] = _clone(parent[propertyName], depth - 1);\n Object.defineProperty(child, propertyName, {\n enumerable: false\n });\n }\n }\n\n return child;\n }\n\n return _clone(parent, depth);\n}\n\n/**\n * Simple flat clone using prototype, accepts only objects, usefull for property\n * override on FLAT configuration object (no nested props).\n *\n * USE WITH CAUTION! This may not behave as you wish if you do not know how this\n * works.\n */\nclone.clonePrototype = function clonePrototype(parent) {\n if (parent === null)\n return null;\n\n var c = function () {};\n c.prototype = parent;\n return new c();\n};\n\n// private utility functions\n\nfunction __objToStr(o) {\n return Object.prototype.toString.call(o);\n}\nclone.__objToStr = __objToStr;\n\nfunction __isDate(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Date]';\n}\nclone.__isDate = __isDate;\n\nfunction __isArray(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Array]';\n}\nclone.__isArray = __isArray;\n\nfunction __isRegExp(o) {\n return typeof o === 'object' && __objToStr(o) === '[object RegExp]';\n}\nclone.__isRegExp = __isRegExp;\n\nfunction __getRegExpFlags(re) {\n var flags = '';\n if (re.global) flags += 'g';\n if (re.ignoreCase) flags += 'i';\n if (re.multiline) flags += 'm';\n return flags;\n}\nclone.__getRegExpFlags = __getRegExpFlags;\n\nreturn clone;\n})();\n\nif (typeof module === 'object' && module.exports) {\n module.exports = clone;\n}\n","/* jshint proto: true */\nimport * as Constants from './constants';\nimport CloneHelper from 'clone';\n\nexport function getLocation(index, inputStream) {\n let n = index + 1;\n let line = null;\n let column = -1;\n\n while (--n >= 0 && inputStream.charAt(n) !== '\\n') {\n column++;\n }\n\n if (typeof index === 'number') {\n line = (inputStream.slice(0, index).match(/\\n/g) || '').length;\n }\n\n return {\n line,\n column\n };\n}\nexport function copyArray(arr) {\n let i;\n const length = arr.length;\n const copy = new Array(length);\n\n for (i = 0; i < length; i++) {\n copy[i] = arr[i];\n }\n return copy;\n}\nexport function clone(obj) {\n const cloned = {};\n for (const prop in obj) {\n if (obj.hasOwnProperty(prop)) {\n cloned[prop] = obj[prop];\n }\n }\n return cloned;\n}\nexport function copyOptions(obj1, obj2) {\n if (obj2 && obj2._defaults) {\n return obj2;\n }\n const opts = utils.defaults(obj1, obj2);\n if (opts.strictMath) {\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n // Back compat with changed relativeUrls option\n if (opts.relativeUrls) {\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n }\n if (typeof opts.math === 'string') {\n switch (opts.math.toLowerCase()) {\n case 'always':\n opts.math = Constants.Math.ALWAYS;\n break;\n case 'parens-division':\n opts.math = Constants.Math.PARENS_DIVISION;\n break;\n case 'strict':\n case 'parens':\n opts.math = Constants.Math.PARENS;\n break;\n case 'strict-legacy':\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n }\n if (typeof opts.rewriteUrls === 'string') {\n switch (opts.rewriteUrls.toLowerCase()) {\n case 'off':\n opts.rewriteUrls = Constants.RewriteUrls.OFF;\n break;\n case 'local':\n opts.rewriteUrls = Constants.RewriteUrls.LOCAL;\n break;\n case 'all':\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n break;\n }\n }\n return opts;\n}\nexport function defaults(obj1, obj2) {\n let newObj = obj2 || {};\n if (!obj2._defaults) {\n newObj = {};\n const defaults = CloneHelper(obj1);\n newObj._defaults = defaults;\n const cloned = obj2 ? CloneHelper(obj2) : {};\n Object.assign(newObj, defaults, cloned);\n }\n return newObj;\n}\nexport function merge(obj1, obj2) {\n for (const prop in obj2) {\n if (obj2.hasOwnProperty(prop)) {\n obj1[prop] = obj2[prop];\n }\n }\n return obj1;\n}\nexport function flattenArray(arr, result = []) {\n for (let i = 0, length = arr.length; i < length; i++) {\n const value = arr[i];\n if (Array.isArray(value)) {\n utils.flattenArray(value, result);\n } else {\n if (value !== undefined) {\n result.push(value);\n }\n }\n }\n return result;\n}","import * as utils from './utils';\n/**\n * This is a centralized class of any error that could be thrown internally (mostly by the parser).\n * Besides standard .message it keeps some additional data like a path to the file where the error\n * occurred along with line and column numbers.\n *\n * @class\n * @extends Error\n * @type {module.LessError}\n *\n * @prop {string} type\n * @prop {string} filename\n * @prop {number} index\n * @prop {number} line\n * @prop {number} column\n * @prop {number} callLine\n * @prop {number} callExtract\n * @prop {string[]} extract\n *\n * @param {Object} e - An error object to wrap around or just a descriptive object\n * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager?\n * @param {string} [currentFilename]\n */\nconst LessError = function LessError(e, fileContentMap, currentFilename) {\n Error.call(this);\n\n const filename = e.filename || currentFilename;\n\n this.message = e.message;\n this.stack = e.stack;\n\n if (fileContentMap && filename) {\n const input = fileContentMap.contents[filename];\n const loc = utils.getLocation(e.index, input);\n const line = loc.line;\n const col = loc.column;\n const callLine = e.call && utils.getLocation(e.call, input).line;\n const lines = input ? input.split('\\n') : '';\n\n this.type = e.type || 'Syntax';\n this.filename = filename;\n this.index = e.index;\n this.line = typeof line === 'number' ? line + 1 : null;\n this.column = col;\n\n if (!this.line && this.stack) {\n const found = this.stack.match(/(|Function):(\\d+):(\\d+)/);\n\n if (found) {\n if (found[2]) {\n this.line = parseInt(found[2]) - 2;\n }\n if (found[3]) {\n this.column = parseInt(found[3]);\n }\n }\n }\n\n this.callLine = callLine + 1;\n this.callExtract = lines[callLine];\n\n this.extract = [\n lines[this.line - 2],\n lines[this.line - 1],\n lines[this.line]\n ];\n }\n\n};\n\nif (typeof Object.create === 'undefined') {\n const F = () => {};\n F.prototype = Error.prototype;\n LessError.prototype = new F();\n} else {\n LessError.prototype = Object.create(Error.prototype);\n}\n\nLessError.prototype.constructor = LessError;\n\n/**\n * An overridden version of the default Object.prototype.toString\n * which uses additional information to create a helpful message.\n *\n * @param {Object} options\n * @returns {string}\n */\nLessError.prototype.toString = function(options = {}) {\n let message = '';\n const extract = this.extract || [];\n let error = [];\n let stylize = str => str;\n if (options.stylize) {\n const type = typeof options.stylize;\n if (type !== 'function') {\n throw Error(`options.stylize should be a function, got a ${type}!`);\n }\n stylize = options.stylize;\n }\n\n if (this.line !== null) {\n if (typeof extract[0] === 'string') {\n error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey'));\n }\n\n if (typeof extract[1] === 'string') {\n let errorTxt = `${this.line} `;\n if (extract[1]) {\n errorTxt += extract[1].slice(0, this.column) +\n stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') +\n extract[1].slice(this.column + 1), 'red'), 'inverse');\n }\n error.push(errorTxt);\n }\n\n if (typeof extract[2] === 'string') {\n error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey'));\n }\n error = `${error.join('\\n') + stylize('', 'reset')}\\n`;\n }\n\n message += stylize(`${this.type}Error: ${this.message}`, 'red');\n if (this.filename) {\n message += stylize(' in ', 'red') + this.filename;\n }\n if (this.line) {\n message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey');\n }\n\n message += `\\n${error}`;\n\n if (this.callLine) {\n message += `${stylize('from ', 'red') + (this.filename || '')}/n`;\n message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`;\n }\n\n return message;\n};\n\nexport default LessError;","import Node from './node';\nimport Element from './element';\nimport LessError from '../less-error';\n\nclass Selector extends Node {\n constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) {\n this.extendList = extendList;\n this.condition = condition;\n this.evaldCondition = !condition;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.elements = this.getElements(elements);\n this.mixinElements_ = undefined;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.elements, this);\n }\n\n accept(visitor) {\n if (this.elements) {\n this.elements = visitor.visitArray(this.elements);\n }\n if (this.extendList) {\n this.extendList = visitor.visitArray(this.extendList);\n }\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n createDerived(elements, extendList, evaldCondition) {\n elements = this.getElements(elements);\n const newSelector = new Selector(elements, extendList || this.extendList,\n null, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition;\n newSelector.mediaEmpty = this.mediaEmpty;\n return newSelector;\n }\n\n getElements(els) {\n if (!els) {\n return [new Element('', '&', false, this._index, this._fileInfo)];\n }\n if (typeof els === 'string') {\n this.parse.parseNode(\n els, \n ['selector'],\n this._index, \n this._fileInfo, \n function(err, result) {\n if (err) {\n throw new LessError({\n index: err.index,\n message: err.message\n }, this.parse.imports, this._fileInfo.filename);\n }\n els = result[0].elements;\n });\n }\n return els;\n }\n\n createEmptySelectors() {\n const el = new Element('', '&', false, this._index, this._fileInfo);\n const sels = [new Selector([el], null, null, this._index, this._fileInfo)];\n sels[0].mediaEmpty = true;\n return sels;\n }\n\n match(other) {\n const elements = this.elements;\n const len = elements.length;\n let olen;\n let i;\n\n other = other.mixinElements();\n olen = other.length;\n if (olen === 0 || len < olen) {\n return 0;\n } else {\n for (i = 0; i < olen; i++) {\n if (elements[i].value !== other[i]) {\n return 0;\n }\n }\n }\n\n return olen; // return number of matched elements\n }\n\n mixinElements() {\n if (this.mixinElements_) {\n return this.mixinElements_;\n }\n\n let elements = this.elements.map( v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\\*\\.\\w-]([\\w-]|(\\\\.))*/g);\n\n if (elements) {\n if (elements[0] === '&') {\n elements.shift();\n }\n } else {\n elements = [];\n }\n\n return (this.mixinElements_ = elements);\n }\n\n isJustParentSelector() {\n return !this.mediaEmpty &&\n this.elements.length === 1 &&\n this.elements[0].value === '&' &&\n (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === '');\n }\n\n eval(context) {\n const evaldCondition = this.condition && this.condition.eval(context);\n let elements = this.elements;\n let extendList = this.extendList;\n\n elements = elements && elements.map(e => e.eval(context));\n extendList = extendList && extendList.map(extend => extend.eval(context));\n\n return this.createDerived(elements, extendList, evaldCondition);\n }\n\n genCSS(context, output) {\n let i;\n let element;\n if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') {\n output.add(' ', this.fileInfo(), this.getIndex());\n }\n for (i = 0; i < this.elements.length; i++) {\n element = this.elements[i];\n element.genCSS(context, output);\n }\n }\n\n getIsOutput() {\n return this.evaldCondition;\n }\n}\n\nSelector.prototype.type = 'Selector';\nexport default Selector;\n","import Node from './node';\n\nclass Value extends Node {\n constructor(value) {\n if (!value) {\n throw new Error('Value requires an array argument');\n }\n if (!Array.isArray(value)) {\n this.value = [ value ];\n }\n else {\n this.value = value;\n }\n }\n\n accept(visitor) {\n if (this.value) {\n this.value = visitor.visitArray(this.value);\n }\n }\n\n eval(context) {\n if (this.value.length === 1) {\n return this.value[0].eval(context);\n } else {\n return new Value(this.value.map(v => v.eval(context)));\n }\n }\n\n genCSS(context, output) {\n let i;\n for (i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (i + 1 < this.value.length) {\n output.add((context && context.compress) ? ',' : ', ');\n }\n }\n }\n}\n\nValue.prototype.type = 'Value';\nexport default Value;\n","import Node from './node';\n\nclass Keyword extends Node {\n constructor(value) { this.value = value; }\n\n genCSS(context, output) {\n if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; }\n output.add(this.value);\n }\n}\n\nKeyword.prototype.type = 'Keyword';\n\nKeyword.True = new Keyword('true');\nKeyword.False = new Keyword('false');\n\nexport default Keyword;\n","import Node from './node';\n\nclass Anonymous extends Node {\n constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) {\n this.value = value;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.mapLines = mapLines;\n this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike;\n this.allowRoot = true;\n this.copyVisibilityInfo(visibilityInfo);\n }\n\n eval() {\n return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo());\n }\n\n compare(other) {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n\n isRulesetLike() {\n return this.rulesetLike;\n }\n\n genCSS(context, output) {\n this.nodeVisible = Boolean(this.value);\n if (this.nodeVisible) {\n output.add(this.value, this._fileInfo, this._index, this.mapLines);\n }\n }\n}\n\nAnonymous.prototype.type = 'Anonymous';\nexport default Anonymous;\n","import Node from './node';\nimport Value from './value';\nimport Keyword from './keyword';\nimport Anonymous from './anonymous';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Declaration extends Node {\n constructor(name, value, important, merge, index, currentFileInfo, inline, variable) {\n this.name = name;\n this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]);\n this.important = important ? ` ${important.trim()}` : '';\n this.merge = merge;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.inline = inline || false;\n this.variable = (variable !== undefined) ? variable\n : (name.charAt && (name.charAt(0) === '@'));\n this.allowRoot = true;\n this.setParent(this.value, this);\n }\n\n genCSS(context, output) {\n output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex());\n try {\n this.value.genCSS(context, output);\n }\n catch (e) {\n e.index = this._index;\n e.filename = this._fileInfo.filename;\n throw e;\n }\n output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index);\n }\n\n eval(context) {\n let mathBypass = false;\n let prevMath;\n let name = this.name;\n let evaldValue;\n let variable = this.variable;\n if (typeof name !== 'string') {\n // expand 'primitive' name directly to get\n // things faster (~10% for benchmark.less):\n name = (name.length === 1) && (name[0] instanceof Keyword) ?\n name[0].value : evalName(context, name);\n variable = false; // never treat expanded interpolation as new variable name\n }\n\n // @todo remove when parens-division is default\n if (name === 'font' && context.math === MATH.ALWAYS) {\n mathBypass = true;\n prevMath = context.math;\n context.math = MATH.PARENS_DIVISION;\n }\n try {\n context.importantScope.push({});\n evaldValue = this.value.eval(context);\n\n if (!this.variable && evaldValue.type === 'DetachedRuleset') {\n throw { message: 'Rulesets cannot be evaluated on a property.',\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n let important = this.important;\n const importantResult = context.importantScope.pop();\n if (!important && importantResult.important) {\n important = importantResult.important;\n }\n\n return new Declaration(name,\n evaldValue,\n important,\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline,\n variable);\n }\n catch (e) {\n if (typeof e.index !== 'number') {\n e.index = this.getIndex();\n e.filename = this.fileInfo().filename;\n }\n throw e;\n }\n finally {\n if (mathBypass) {\n context.math = prevMath;\n }\n }\n }\n\n makeImportant() {\n return new Declaration(this.name,\n this.value,\n '!important',\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline);\n }\n}\n\nfunction evalName(context, name) {\n let value = '';\n let i;\n const n = name.length;\n const output = {add: function (s) {value += s;}};\n for (i = 0; i < n; i++) {\n name[i].eval(context).genCSS(context, output);\n }\n return value;\n}\n\nDeclaration.prototype.type = 'Declaration';\nexport default Declaration;","const debugInfo = (context, ctx, lineSeparator) => {\n let result = '';\n if (context.dumpLineNumbers && !context.compress) {\n switch (context.dumpLineNumbers) {\n case 'comments':\n result = debugInfo.asComment(ctx);\n break;\n case 'mediaquery':\n result = debugInfo.asMediaQuery(ctx);\n break;\n case 'all':\n result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx);\n break;\n }\n }\n return result;\n};\n\ndebugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\\n`;\n\ndebugInfo.asMediaQuery = ctx => {\n let filenameWithProtocol = ctx.debugInfo.fileName;\n if (!/^[a-z]+:\\/\\//i.test(filenameWithProtocol)) {\n filenameWithProtocol = `file://${filenameWithProtocol}`;\n }\n return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\\/\\\\])/g, a => {\n if (a == '\\\\') {\n a = '\\/';\n }\n return `\\\\${a}`;\n})}}line{font-family:\\\\00003${ctx.debugInfo.lineNumber}}}\\n`;\n};\n\nexport default debugInfo;\n","import Node from './node';\nimport getDebugInfo from './debug-info';\n\nclass Comment extends Node {\n constructor(value, isLineComment, index, currentFileInfo) {\n this.value = value;\n this.isLineComment = isLineComment;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n genCSS(context, output) {\n if (this.debugInfo) {\n output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n }\n\n isSilent(context) {\n const isCompressed = context.compress && this.value[2] !== '!';\n return this.isLineComment || isCompressed;\n }\n}\n\nComment.prototype.type = 'Comment';\nexport default Comment;\n","const contexts = {};\nexport default contexts;\nimport * as Constants from './constants';\n\nconst copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) {\n if (!original) { return; }\n\n for (let i = 0; i < propertiesToCopy.length; i++) {\n if (original.hasOwnProperty(propertiesToCopy[i])) {\n destination[propertiesToCopy[i]] = original[propertiesToCopy[i]];\n }\n }\n};\n\n/*\n parse is used whilst parsing\n */\nconst parseCopyProperties = [\n // options\n 'paths', // option - unmodified - paths to search for imports on\n 'rewriteUrls', // option - whether to adjust URL's to be relative\n 'rootpath', // option - rootpath to append to URL's\n 'strictImports', // option -\n 'insecure', // option - whether to allow imports from insecure ssl hosts\n 'dumpLineNumbers', // option - whether to dump line numbers\n 'compress', // option - whether to compress\n 'syncImport', // option - whether to import synchronously\n 'chunkInput', // option - whether to chunk input. more performant but causes parse issues.\n 'mime', // browser only - mime type for sheet import\n 'useFileCache', // browser only - whether to use the per file session cache\n // context\n 'processImports', // option & context - whether to process imports. if false then imports will not be imported.\n // Used by the import manager to stop multiple import visitors being created.\n 'pluginManager' // Used as the plugin manager for the session\n];\n\ncontexts.Parse = function(options) {\n copyFromOriginal(options, this, parseCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n};\n\nconst evalCopyProperties = [\n 'paths', // additional include paths\n 'compress', // whether to compress\n 'ieCompat', // whether to enforce IE compatibility (IE8 data-uri)\n 'math', // whether math has to be within parenthesis\n 'strictUnits', // whether units need to evaluate correctly\n 'sourceMap', // whether to output a source map\n 'importMultiple', // whether we are currently importing multiple copies\n 'urlArgs', // whether to add args into url tokens\n 'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false\n 'pluginManager', // Used as the plugin manager for the session\n 'importantScope', // used to bubble up !important statements\n 'rewriteUrls' // option - whether to adjust URL's to be relative\n];\n\ncontexts.Eval = function(options, frames) {\n copyFromOriginal(options, this, evalCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n\n this.frames = frames || [];\n this.importantScope = this.importantScope || [];\n};\n\ncontexts.Eval.prototype.enterCalc = function () {\n if (!this.calcStack) {\n this.calcStack = [];\n }\n this.calcStack.push(true);\n this.inCalc = true;\n};\n\ncontexts.Eval.prototype.exitCalc = function () {\n this.calcStack.pop();\n if (!this.calcStack) {\n this.inCalc = false;\n }\n};\n\ncontexts.Eval.prototype.inParenthesis = function () {\n if (!this.parensStack) {\n this.parensStack = [];\n }\n this.parensStack.push(true);\n};\n\ncontexts.Eval.prototype.outOfParenthesis = function () {\n this.parensStack.pop();\n};\n\ncontexts.Eval.prototype.inCalc = false;\ncontexts.Eval.prototype.mathOn = true;\ncontexts.Eval.prototype.isMathOn = function (op) {\n if (!this.mathOn) {\n return false;\n }\n if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) {\n return false;\n }\n if (this.math > Constants.Math.PARENS_DIVISION) {\n return this.parensStack && this.parensStack.length;\n }\n return true;\n};\n\ncontexts.Eval.prototype.pathRequiresRewrite = function (path) {\n const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative;\n\n return isRelative(path);\n};\n\ncontexts.Eval.prototype.rewritePath = function (path, rootpath) {\n let newPath;\n\n rootpath = rootpath || '';\n newPath = this.normalizePath(rootpath + path);\n\n // If a path was explicit relative and the rootpath was not an absolute path\n // we must ensure that the new path is also explicit relative.\n if (isPathLocalRelative(path) &&\n isPathRelative(rootpath) &&\n isPathLocalRelative(newPath) === false) {\n newPath = `./${newPath}`;\n }\n\n return newPath;\n};\n\ncontexts.Eval.prototype.normalizePath = path => {\n const segments = path.split('/').reverse();\n let segment;\n\n path = [];\n while (segments.length !== 0) {\n segment = segments.pop();\n switch ( segment ) {\n case '.':\n break;\n case '..':\n if ((path.length === 0) || (path[path.length - 1] === '..')) {\n path.push( segment );\n } else {\n path.pop();\n }\n break;\n default:\n path.push(segment);\n break;\n }\n }\n\n return path.join('/');\n};\n\nfunction isPathRelative(path) {\n return !/^(?:[a-z-]+:|\\/|#)/i.test(path);\n}\n\nfunction isPathLocalRelative(path) {\n return path.charAt(0) === '.';\n}\n\n// todo - do the same for the toCSS ?\n","function makeRegistry( base ) {\n return {\n _data: {},\n add: function(name, func) {\n // precautionary case conversion, as later querying of\n // the registry by function-caller uses lower case as well.\n name = name.toLowerCase();\n\n if (this._data.hasOwnProperty(name)) {\n // TODO warn\n }\n this._data[name] = func;\n },\n addMultiple: function(functions) {\n Object.keys(functions).forEach(\n name => {\n this.add(name, functions[name]);\n });\n },\n get: function(name) {\n return this._data[name] || ( base && base.get( name ));\n },\n getLocalFunctions: function() {\n return this._data;\n },\n inherit: function() {\n return makeRegistry( this );\n },\n create: function(base) {\n return makeRegistry(base);\n }\n };\n}\n\nexport default makeRegistry( null );","import Keyword from '../tree/keyword';\n\nconst defaultFunc = {\n eval: function () {\n const v = this.value_;\n const e = this.error_;\n if (e) {\n throw e;\n }\n if (v != null) {\n return v ? Keyword.True : Keyword.False;\n }\n },\n value: function (v) {\n this.value_ = v;\n },\n error: function (e) {\n this.error_ = e;\n },\n reset: function () {\n this.value_ = this.error_ = null;\n }\n};\n\nexport default { 'default': defaultFunc.eval.bind(defaultFunc) };\n","import Node from './node';\nimport Declaration from './declaration';\nimport Keyword from './keyword';\nimport Comment from './comment';\nimport Paren from './paren';\nimport Selector from './selector';\nimport Element from './element';\nimport Anonymous from './anonymous';\nimport contexts from '../contexts';\nimport globalFunctionRegistry from '../functions/function-registry';\nimport defaultFunc from '../functions/default';\nimport getDebugInfo from './debug-info';\nimport * as utils from '../utils';\n\nclass Ruleset extends Node {\n constructor(selectors, rules, strictImports, visibilityInfo) {\n this.selectors = selectors;\n this.rules = rules;\n this._lookups = {};\n this._variables = null;\n this._properties = null;\n this.strictImports = strictImports;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n this.setParent(this.selectors, this);\n this.setParent(this.rules, this);\n\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.paths) {\n this.paths = visitor.visitArray(this.paths, true);\n } else if (this.selectors) {\n this.selectors = visitor.visitArray(this.selectors);\n }\n if (this.rules && this.rules.length) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n eval(context) {\n const that = this;\n let selectors;\n let selCnt;\n let selector;\n let i;\n let hasVariable;\n let hasOnePassingSelector = false;\n\n if (this.selectors && (selCnt = this.selectors.length)) {\n selectors = new Array(selCnt);\n defaultFunc.error({\n type: 'Syntax',\n message: 'it is currently only allowed in parametric mixin guards,'\n });\n\n for (i = 0; i < selCnt; i++) {\n selector = this.selectors[i].eval(context);\n for (var j = 0; j < selector.elements.length; j++) {\n if (selector.elements[j].isVariable) {\n hasVariable = true;\n break;\n }\n }\n selectors[i] = selector;\n if (selector.evaldCondition) {\n hasOnePassingSelector = true;\n }\n }\n\n if (hasVariable) {\n const toParseSelectors = new Array(selCnt);\n for (i = 0; i < selCnt; i++) {\n selector = selectors[i];\n toParseSelectors[i] = selector.toCSS(context);\n }\n this.parse.parseNode(\n toParseSelectors.join(','),\n [\"selectors\"], \n selectors[0].getIndex(), \n selectors[0].fileInfo(), \n (err, result) => {\n if (result) {\n selectors = utils.flattenArray(result);\n }\n });\n }\n\n defaultFunc.reset();\n } else {\n hasOnePassingSelector = true;\n }\n\n let rules = this.rules ? utils.copyArray(this.rules) : null;\n const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo());\n let rule;\n let subRule;\n\n ruleset.originalRuleset = this;\n ruleset.root = this.root;\n ruleset.firstRoot = this.firstRoot;\n ruleset.allowImports = this.allowImports;\n\n if (this.debugInfo) {\n ruleset.debugInfo = this.debugInfo;\n }\n\n if (!hasOnePassingSelector) {\n rules.length = 0;\n }\n\n // inherit a function registry from the frames stack when possible;\n // otherwise from the global registry\n ruleset.functionRegistry = (frames => {\n let i = 0;\n const n = frames.length;\n let found;\n for ( ; i !== n ; ++i ) {\n found = frames[ i ].functionRegistry;\n if ( found ) { return found; }\n }\n return globalFunctionRegistry;\n })(context.frames).inherit();\n\n // push the current ruleset to the frames stack\n const ctxFrames = context.frames;\n ctxFrames.unshift(ruleset);\n\n // currrent selectors\n let ctxSelectors = context.selectors;\n if (!ctxSelectors) {\n context.selectors = ctxSelectors = [];\n }\n ctxSelectors.unshift(this.selectors);\n\n // Evaluate imports\n if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {\n ruleset.evalImports(context);\n }\n\n // Store the frames around mixin definitions,\n // so they can be evaluated like closures when the time comes.\n const rsRules = ruleset.rules;\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.evalFirst) {\n rsRules[i] = rule.eval(context);\n }\n }\n\n const mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0;\n\n // Evaluate mixin calls.\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.type === 'MixinCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope if the variable is\n // already there. consider returning false here\n // but we need a way to \"return\" variable from mixins\n return !(ruleset.variable(r.name));\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n } else if (rule.type === 'VariableCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).rules.filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope at all\n return false;\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n if (!rule.evalFirst) {\n rsRules[i] = rule = rule.eval ? rule.eval(context) : rule;\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n // for rulesets, check if it is a css guard and can be removed\n if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) {\n // check if it can be folded in (e.g. & where)\n if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) {\n rsRules.splice(i--, 1);\n\n for (var j = 0; (subRule = rule.rules[j]); j++) {\n if (subRule instanceof Node) {\n subRule.copyVisibilityInfo(rule.visibilityInfo());\n if (!(subRule instanceof Declaration) || !subRule.variable) {\n rsRules.splice(++i, 0, subRule);\n }\n }\n }\n }\n }\n }\n\n // Pop the stack\n ctxFrames.shift();\n ctxSelectors.shift();\n\n if (context.mediaBlocks) {\n for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) {\n context.mediaBlocks[i].bubbleSelectors(selectors);\n }\n }\n\n return ruleset;\n }\n\n evalImports(context) {\n const rules = this.rules;\n let i;\n let importRules;\n if (!rules) { return; }\n\n for (i = 0; i < rules.length; i++) {\n if (rules[i].type === 'Import') {\n importRules = rules[i].eval(context);\n if (importRules && (importRules.length || importRules.length === 0)) {\n rules.splice(...[i, 1].concat(importRules));\n i += importRules.length - 1;\n } else {\n rules.splice(i, 1, importRules);\n }\n this.resetCache();\n }\n }\n }\n\n makeImportant() {\n const result = new Ruleset(this.selectors, this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant();\n } else {\n return r;\n }\n }), this.strictImports, this.visibilityInfo());\n\n return result;\n }\n\n matchArgs(args) {\n return !args || args.length === 0;\n }\n\n // lets you call a css selector with a guard\n matchCondition(args, context) {\n const lastSelector = this.selectors[this.selectors.length - 1];\n if (!lastSelector.evaldCondition) {\n return false;\n }\n if (lastSelector.condition &&\n !lastSelector.condition.eval(\n new contexts.Eval(context,\n context.frames))) {\n return false;\n }\n return true;\n }\n\n resetCache() {\n this._rulesets = null;\n this._variables = null;\n this._properties = null;\n this._lookups = {};\n }\n\n variables() {\n if (!this._variables) {\n this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable === true) {\n hash[r.name] = r;\n }\n // when evaluating variables in an import statement, imports have not been eval'd\n // so we need to go inside import statements.\n // guard against root being a string (in the case of inlined less)\n if (r.type === 'Import' && r.root && r.root.variables) {\n const vars = r.root.variables();\n for (const name in vars) {\n if (vars.hasOwnProperty(name)) {\n hash[name] = r.root.variable(name);\n }\n }\n }\n return hash;\n }, {});\n }\n return this._variables;\n }\n\n properties() {\n if (!this._properties) {\n this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable !== true) {\n const name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ?\n r.name[0].value : r.name;\n // Properties don't overwrite as they can merge\n if (!hash[`$${name}`]) {\n hash[`$${name}`] = [ r ];\n }\n else {\n hash[`$${name}`].push(r);\n }\n }\n return hash;\n }, {});\n }\n return this._properties;\n }\n\n variable(name) {\n const decl = this.variables()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n property(name) {\n const decl = this.properties()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n lastDeclaration() {\n for (let i = this.rules.length; i > 0; i--) {\n const decl = this.rules[i - 1];\n if (decl instanceof Declaration) {\n return this.parseValue(decl);\n }\n }\n }\n\n parseValue(toParse) {\n const self = this;\n function transformDeclaration(decl) {\n if (decl.value instanceof Anonymous && !decl.parsed) {\n if (typeof decl.value.value === 'string') {\n this.parse.parseNode(\n decl.value.value,\n ['value', 'important'], \n decl.value.getIndex(), \n decl.fileInfo(), \n (err, result) => {\n if (err) {\n decl.parsed = true;\n }\n if (result) {\n decl.value = result[0];\n decl.important = result[1] || '';\n decl.parsed = true;\n }\n });\n } else {\n decl.parsed = true;\n }\n\n return decl;\n }\n else {\n return decl;\n }\n }\n if (!Array.isArray(toParse)) {\n return transformDeclaration.call(self, toParse);\n }\n else {\n const nodes = [];\n toParse.forEach(n => {\n nodes.push(transformDeclaration.call(self, n));\n });\n return nodes;\n }\n }\n\n rulesets() {\n if (!this.rules) { return []; }\n\n const filtRules = [];\n const rules = this.rules;\n let i;\n let rule;\n\n for (i = 0; (rule = rules[i]); i++) {\n if (rule.isRuleset) {\n filtRules.push(rule);\n }\n }\n\n return filtRules;\n }\n\n prependRule(rule) {\n const rules = this.rules;\n if (rules) {\n rules.unshift(rule);\n } else {\n this.rules = [ rule ];\n }\n this.setParent(rule, this);\n }\n\n find(selector, self = this, filter) {\n const rules = [];\n let match;\n let foundMixins;\n const key = selector.toCSS();\n\n if (key in this._lookups) { return this._lookups[key]; }\n\n this.rulesets().forEach(rule => {\n if (rule !== self) {\n for (let j = 0; j < rule.selectors.length; j++) {\n match = selector.match(rule.selectors[j]);\n if (match) {\n if (selector.elements.length > match) {\n if (!filter || filter(rule)) {\n foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter);\n for (let i = 0; i < foundMixins.length; ++i) {\n foundMixins[i].path.push(rule);\n }\n Array.prototype.push.apply(rules, foundMixins);\n }\n } else {\n rules.push({ rule, path: []});\n }\n break;\n }\n }\n }\n });\n this._lookups[key] = rules;\n return rules;\n }\n\n genCSS(context, output) {\n let i;\n let j;\n const charsetRuleNodes = [];\n let ruleNodes = [];\n\n let // Line number debugging\n debugInfo;\n\n let rule;\n let path;\n\n context.tabLevel = (context.tabLevel || 0);\n\n if (!this.root) {\n context.tabLevel++;\n }\n\n const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' ');\n const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' ');\n let sep;\n\n let charsetNodeIndex = 0;\n let importNodeIndex = 0;\n for (i = 0; (rule = this.rules[i]); i++) {\n if (rule instanceof Comment) {\n if (importNodeIndex === i) {\n importNodeIndex++;\n }\n ruleNodes.push(rule);\n } else if (rule.isCharset && rule.isCharset()) {\n ruleNodes.splice(charsetNodeIndex, 0, rule);\n charsetNodeIndex++;\n importNodeIndex++;\n } else if (rule.type === 'Import') {\n ruleNodes.splice(importNodeIndex, 0, rule);\n importNodeIndex++;\n } else {\n ruleNodes.push(rule);\n }\n }\n ruleNodes = charsetRuleNodes.concat(ruleNodes);\n\n // If this is the root node, we don't render\n // a selector, or {}.\n if (!this.root) {\n debugInfo = getDebugInfo(context, this, tabSetStr);\n\n if (debugInfo) {\n output.add(debugInfo);\n output.add(tabSetStr);\n }\n\n const paths = this.paths;\n const pathCnt = paths.length;\n let pathSubCnt;\n\n sep = context.compress ? ',' : (`,\\n${tabSetStr}`);\n\n for (i = 0; i < pathCnt; i++) {\n path = paths[i];\n if (!(pathSubCnt = path.length)) { continue; }\n if (i > 0) { output.add(sep); }\n\n context.firstSelector = true;\n path[0].genCSS(context, output);\n\n context.firstSelector = false;\n for (j = 1; j < pathSubCnt; j++) {\n path[j].genCSS(context, output);\n }\n }\n\n output.add((context.compress ? '{' : ' {\\n') + tabRuleStr);\n }\n\n // Compile rules and rulesets\n for (i = 0; (rule = ruleNodes[i]); i++) {\n\n if (i + 1 === ruleNodes.length) {\n context.lastRule = true;\n }\n\n const currentLastRule = context.lastRule;\n if (rule.isRulesetLike(rule)) {\n context.lastRule = false;\n }\n\n if (rule.genCSS) {\n rule.genCSS(context, output);\n } else if (rule.value) {\n output.add(rule.value.toString());\n }\n\n context.lastRule = currentLastRule;\n\n if (!context.lastRule && rule.isVisible()) {\n output.add(context.compress ? '' : (`\\n${tabRuleStr}`));\n } else {\n context.lastRule = false;\n }\n }\n\n if (!this.root) {\n output.add((context.compress ? '}' : `\\n${tabSetStr}}`));\n context.tabLevel--;\n }\n\n if (!output.isEmpty() && !context.compress && this.firstRoot) {\n output.add('\\n');\n }\n }\n\n joinSelectors(paths, context, selectors) {\n for (let s = 0; s < selectors.length; s++) {\n this.joinSelector(paths, context, selectors[s]);\n }\n }\n\n joinSelector(paths, context, selector) {\n function createParenthesis(elementsToPak, originalElement) {\n let replacementParen;\n let j;\n if (elementsToPak.length === 0) {\n replacementParen = new Paren(elementsToPak[0]);\n } else {\n const insideParent = new Array(elementsToPak.length);\n for (j = 0; j < elementsToPak.length; j++) {\n insideParent[j] = new Element(\n null,\n elementsToPak[j],\n originalElement.isVariable,\n originalElement._index,\n originalElement._fileInfo\n );\n }\n replacementParen = new Paren(new Selector(insideParent));\n }\n return replacementParen;\n }\n\n function createSelector(containedElement, originalElement) {\n let element;\n let selector;\n element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo);\n selector = new Selector([element]);\n return selector;\n }\n\n // joins selector path from `beginningPath` with selector path in `addPath`\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns concatenated path\n function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) {\n let newSelectorPath;\n let lastSelector;\n let newJoinedSelector;\n // our new selector path\n newSelectorPath = [];\n\n // construct the joined selector - if & is the first thing this will be empty,\n // if not newJoinedSelector will be the last set of elements in the selector\n if (beginningPath.length > 0) {\n newSelectorPath = utils.copyArray(beginningPath);\n lastSelector = newSelectorPath.pop();\n newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements));\n }\n else {\n newJoinedSelector = originalSelector.createDerived([]);\n }\n\n if (addPath.length > 0) {\n // /deep/ is a CSS4 selector - (removed, so should deprecate)\n // that is valid without anything in front of it\n // so if the & does not have a combinator that is \"\" or \" \" then\n // and there is a combinator on the parent, then grab that.\n // this also allows + a { & .b { .a & { ... though not sure why you would want to do that\n let combinator = replacedElement.combinator;\n\n const parentEl = addPath[0].elements[0];\n if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) {\n combinator = parentEl.combinator;\n }\n // join the elements so far with the first part of the parent\n newJoinedSelector.elements.push(new Element(\n combinator,\n parentEl.value,\n replacedElement.isVariable,\n replacedElement._index,\n replacedElement._fileInfo\n ));\n newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1));\n }\n\n // now add the joined selector - but only if it is not empty\n if (newJoinedSelector.elements.length !== 0) {\n newSelectorPath.push(newJoinedSelector);\n }\n\n // put together the parent selectors after the join (e.g. the rest of the parent)\n if (addPath.length > 1) {\n let restOfPath = addPath.slice(1);\n restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, []));\n newSelectorPath = newSelectorPath.concat(restOfPath);\n }\n return newSelectorPath;\n }\n\n // joins selector path from `beginningPath` with every selector path in `addPaths` array\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns array with all concatenated paths\n function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) {\n let j;\n for (j = 0; j < beginningPath.length; j++) {\n const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector);\n result.push(newSelectorPath);\n }\n return result;\n }\n\n function mergeElementsOnToSelectors(elements, selectors) {\n let i;\n let sel;\n\n if (elements.length === 0) {\n return ;\n }\n if (selectors.length === 0) {\n selectors.push([ new Selector(elements) ]);\n return;\n }\n\n for (i = 0; (sel = selectors[i]); i++) {\n // if the previous thing in sel is a parent this needs to join on to it\n if (sel.length > 0) {\n sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements));\n }\n else {\n sel.push(new Selector(elements));\n }\n }\n }\n\n // replace all parent selectors inside `inSelector` by content of `context` array\n // resulting selectors are returned inside `paths` array\n // returns true if `inSelector` contained at least one parent selector\n function replaceParentSelector(paths, context, inSelector) {\n // The paths are [[Selector]]\n // The first list is a list of comma separated selectors\n // The inner list is a list of inheritance separated selectors\n // e.g.\n // .a, .b {\n // .c {\n // }\n // }\n // == [[.a] [.c]] [[.b] [.c]]\n //\n let i;\n\n let j;\n let k;\n let currentElements;\n let newSelectors;\n let selectorsMultiplied;\n let sel;\n let el;\n let hadParentSelector = false;\n let length;\n let lastSelector;\n function findNestedSelector(element) {\n let maybeSelector;\n if (!(element.value instanceof Paren)) {\n return null;\n }\n\n maybeSelector = element.value.value;\n if (!(maybeSelector instanceof Selector)) {\n return null;\n }\n\n return maybeSelector;\n }\n\n // the elements from the current selector so far\n currentElements = [];\n // the current list of new selectors to add to the path.\n // We will build it up. We initiate it with one empty selector as we \"multiply\" the new selectors\n // by the parents\n newSelectors = [\n []\n ];\n\n for (i = 0; (el = inSelector.elements[i]); i++) {\n // non parent reference elements just get added\n if (el.value !== '&') {\n const nestedSelector = findNestedSelector(el);\n if (nestedSelector != null) {\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n const nestedPaths = [];\n let replaced;\n const replacedNewSelectors = [];\n replaced = replaceParentSelector(nestedPaths, context, nestedSelector);\n hadParentSelector = hadParentSelector || replaced;\n // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors\n for (k = 0; k < nestedPaths.length; k++) {\n const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el);\n addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors);\n }\n newSelectors = replacedNewSelectors;\n currentElements = [];\n } else {\n currentElements.push(el);\n }\n\n } else {\n hadParentSelector = true;\n // the new list of selectors to add\n selectorsMultiplied = [];\n\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n // loop through our current selectors\n for (j = 0; j < newSelectors.length; j++) {\n sel = newSelectors[j];\n // if we don't have any parent paths, the & might be in a mixin so that it can be used\n // whether there are parents or not\n if (context.length === 0) {\n // the combinator used on el should now be applied to the next element instead so that\n // it is not lost\n if (sel.length > 0) {\n sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo));\n }\n selectorsMultiplied.push(sel);\n }\n else {\n // and the parent selectors\n for (k = 0; k < context.length; k++) {\n // We need to put the current selectors\n // then join the last selector's elements on to the parents selectors\n const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector);\n // add that to our new set of selectors\n selectorsMultiplied.push(newSelectorPath);\n }\n }\n }\n\n // our new selectors has been multiplied, so reset the state\n newSelectors = selectorsMultiplied;\n currentElements = [];\n }\n }\n\n // if we have any elements left over (e.g. .a& .b == .b)\n // add them on to all the current selectors\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n for (i = 0; i < newSelectors.length; i++) {\n length = newSelectors[i].length;\n if (length > 0) {\n paths.push(newSelectors[i]);\n lastSelector = newSelectors[i][length - 1];\n newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList);\n }\n }\n\n return hadParentSelector;\n }\n\n function deriveSelector(visibilityInfo, deriveFrom) {\n const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition);\n newSelector.copyVisibilityInfo(visibilityInfo);\n return newSelector;\n }\n\n // joinSelector code follows\n let i;\n\n let newPaths;\n let hadParentSelector;\n\n newPaths = [];\n hadParentSelector = replaceParentSelector(newPaths, context, selector);\n\n if (!hadParentSelector) {\n if (context.length > 0) {\n newPaths = [];\n for (i = 0; i < context.length; i++) {\n\n const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo()));\n\n concatenated.push(selector);\n newPaths.push(concatenated);\n }\n }\n else {\n newPaths = [[selector]];\n }\n }\n\n for (i = 0; i < newPaths.length; i++) {\n paths.push(newPaths[i]);\n }\n }\n}\n\nRuleset.prototype.type = 'Ruleset';\nRuleset.prototype.isRuleset = true;\nexport default Ruleset;\n","import Node from './node';\nimport Selector from './selector';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\n\nclass AtRule extends Node {\n constructor(\n name,\n value,\n rules,\n index,\n currentFileInfo,\n debugInfo,\n isRooted,\n visibilityInfo\n ) {\n let i;\n\n this.name = name;\n this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value);\n if (rules) {\n if (Array.isArray(rules)) {\n this.rules = rules;\n } else {\n this.rules = [rules];\n this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors();\n }\n for (i = 0; i < this.rules.length; i++) {\n this.rules[i].allowImports = true;\n }\n this.setParent(this.rules, this);\n }\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.debugInfo = debugInfo;\n this.isRooted = isRooted || false;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n const value = this.value;\n const rules = this.rules;\n if (rules) {\n this.rules = visitor.visitArray(rules);\n }\n if (value) {\n this.value = visitor.visit(value);\n }\n }\n\n isRulesetLike() {\n return this.rules || !this.isCharset();\n }\n\n isCharset() {\n return '@charset' === this.name;\n }\n\n genCSS(context, output) {\n const value = this.value;\n const rules = this.rules;\n output.add(this.name, this.fileInfo(), this.getIndex());\n if (value) {\n output.add(' ');\n value.genCSS(context, output);\n }\n if (rules) {\n this.outputRuleset(context, output, rules);\n } else {\n output.add(';');\n }\n }\n\n eval(context) {\n let mediaPathBackup;\n let mediaBlocksBackup;\n let value = this.value;\n let rules = this.rules;\n\n // media stored inside other atrule should not bubble over it\n // backpup media bubbling information\n mediaPathBackup = context.mediaPath;\n mediaBlocksBackup = context.mediaBlocks;\n // deleted media bubbling information\n context.mediaPath = [];\n context.mediaBlocks = [];\n\n if (value) {\n value = value.eval(context);\n }\n if (rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n rules = [rules[0].eval(context)];\n rules[0].root = true;\n }\n // restore media bubbling information\n context.mediaPath = mediaPathBackup;\n context.mediaBlocks = mediaBlocksBackup;\n\n return new AtRule(this.name, value, rules,\n this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo());\n }\n\n variable(name) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.variable.call(this.rules[0], name);\n }\n }\n\n find(...args) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.find.apply(this.rules[0], args);\n }\n }\n\n rulesets() {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.rulesets.apply(this.rules[0]);\n }\n }\n\n outputRuleset(context, output, rules) {\n const ruleCnt = rules.length;\n let i;\n context.tabLevel = (context.tabLevel | 0) + 1;\n\n // Compressed\n if (context.compress) {\n output.add('{');\n for (i = 0; i < ruleCnt; i++) {\n rules[i].genCSS(context, output);\n }\n output.add('}');\n context.tabLevel--;\n return;\n }\n\n // Non-compressed\n const tabSetStr = `\\n${Array(context.tabLevel).join(' ')}`;\n\n const tabRuleStr = `${tabSetStr} `;\n if (!ruleCnt) {\n output.add(` {${tabSetStr}}`);\n } else {\n output.add(` {${tabRuleStr}`);\n rules[0].genCSS(context, output);\n for (i = 1; i < ruleCnt; i++) {\n output.add(tabRuleStr);\n rules[i].genCSS(context, output);\n }\n output.add(`${tabSetStr}}`);\n }\n\n context.tabLevel--;\n }\n}\n\nAtRule.prototype.type = 'AtRule';\nexport default AtRule;\n","import Node from './node';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass DetachedRuleset extends Node {\n constructor(ruleset, frames) {\n this.ruleset = ruleset;\n this.frames = frames;\n this.setParent(this.ruleset, this);\n }\n\n accept(visitor) {\n this.ruleset = visitor.visit(this.ruleset);\n }\n\n eval(context) {\n const frames = this.frames || utils.copyArray(context.frames);\n return new DetachedRuleset(this.ruleset, frames);\n }\n\n callEval(context) {\n return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context);\n }\n}\n\nDetachedRuleset.prototype.type = 'DetachedRuleset';\nDetachedRuleset.prototype.evalFirst = true;\nexport default DetachedRuleset;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport * as utils from '../utils';\n\nclass Unit extends Node {\n constructor(numerator, denominator, backupUnit) {\n this.numerator = numerator ? utils.copyArray(numerator).sort() : [];\n this.denominator = denominator ? utils.copyArray(denominator).sort() : [];\n if (backupUnit) {\n this.backupUnit = backupUnit;\n } else if (numerator && numerator.length) {\n this.backupUnit = numerator[0];\n }\n }\n\n clone() {\n return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit);\n }\n\n genCSS(context, output) {\n // Dimension checks the unit is singular and throws an error if in strict math mode.\n const strictUnits = context && context.strictUnits;\n if (this.numerator.length === 1) {\n output.add(this.numerator[0]); // the ideal situation\n } else if (!strictUnits && this.backupUnit) {\n output.add(this.backupUnit);\n } else if (!strictUnits && this.denominator.length) {\n output.add(this.denominator[0]);\n }\n }\n\n toString() {\n let i;\n let returnStr = this.numerator.join('*');\n for (i = 0; i < this.denominator.length; i++) {\n returnStr += `/${this.denominator[i]}`;\n }\n return returnStr;\n }\n\n compare(other) {\n return this.is(other.toString()) ? 0 : undefined;\n }\n\n is(unitString) {\n return this.toString().toUpperCase() === unitString.toUpperCase();\n }\n\n isLength() {\n return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS());\n }\n\n isEmpty() {\n return this.numerator.length === 0 && this.denominator.length === 0;\n }\n\n isSingular() {\n return this.numerator.length <= 1 && this.denominator.length === 0;\n }\n\n map(callback) {\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n this.numerator[i] = callback(this.numerator[i], false);\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n this.denominator[i] = callback(this.denominator[i], true);\n }\n }\n\n usedUnits() {\n let group;\n const result = {};\n let mapUnit;\n let groupName;\n\n mapUnit = atomicUnit => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit) && !result[groupName]) {\n result[groupName] = atomicUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in unitConversions) {\n if (unitConversions.hasOwnProperty(groupName)) {\n group = unitConversions[groupName];\n\n this.map(mapUnit);\n }\n }\n\n return result;\n }\n\n cancel() {\n const counter = {};\n let atomicUnit;\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n atomicUnit = this.numerator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) + 1;\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n atomicUnit = this.denominator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) - 1;\n }\n\n this.numerator = [];\n this.denominator = [];\n\n for (atomicUnit in counter) {\n if (counter.hasOwnProperty(atomicUnit)) {\n const count = counter[atomicUnit];\n\n if (count > 0) {\n for (i = 0; i < count; i++) {\n this.numerator.push(atomicUnit);\n }\n } else if (count < 0) {\n for (i = 0; i < -count; i++) {\n this.denominator.push(atomicUnit);\n }\n }\n }\n }\n\n this.numerator.sort();\n this.denominator.sort();\n }\n}\n\nUnit.prototype.type = 'Unit';\nexport default Unit;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport Unit from './unit';\nimport Color from './color';\n\n//\n// A number with a unit\n//\nclass Dimension extends Node {\n constructor(value, unit) {\n this.value = parseFloat(value);\n if (isNaN(this.value)) {\n throw new Error('Dimension is not a number.');\n }\n this.unit = (unit && unit instanceof Unit) ? unit :\n new Unit(unit ? [unit] : undefined);\n this.setParent(this.unit, this);\n }\n\n accept(visitor) {\n this.unit = visitor.visit(this.unit);\n }\n\n eval(context) {\n return this;\n }\n\n toColor() {\n return new Color([this.value, this.value, this.value]);\n }\n\n genCSS(context, output) {\n if ((context && context.strictUnits) && !this.unit.isSingular()) {\n throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`);\n }\n\n const value = this.fround(context, this.value);\n let strValue = String(value);\n\n if (value !== 0 && value < 0.000001 && value > -0.000001) {\n // would be output 1e-6 etc.\n strValue = value.toFixed(20).replace(/0+$/, '');\n }\n\n if (context && context.compress) {\n // Zero values doesn't need a unit\n if (value === 0 && this.unit.isLength()) {\n output.add(strValue);\n return;\n }\n\n // Float values doesn't need a leading zero\n if (value > 0 && value < 1) {\n strValue = (strValue).substr(1);\n }\n }\n\n output.add(strValue);\n this.unit.genCSS(context, output);\n }\n\n // In an operation between two Dimensions,\n // we default to the first Dimension's unit,\n // so `1px + 2` will yield `3px`.\n operate(context, op, other) {\n /* jshint noempty:false */\n let value = this._operate(context, op, this.value, other.value);\n\n let unit = this.unit.clone();\n\n if (op === '+' || op === '-') {\n if (unit.numerator.length === 0 && unit.denominator.length === 0) {\n unit = other.unit.clone();\n if (this.unit.backupUnit) {\n unit.backupUnit = this.unit.backupUnit;\n }\n } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) {\n // do nothing\n } else {\n other = other.convertTo(this.unit.usedUnits());\n\n if (context.strictUnits && other.unit.toString() !== unit.toString()) {\n throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`);\n }\n\n value = this._operate(context, op, this.value, other.value);\n }\n } else if (op === '*') {\n unit.numerator = unit.numerator.concat(other.unit.numerator).sort();\n unit.denominator = unit.denominator.concat(other.unit.denominator).sort();\n unit.cancel();\n } else if (op === '/') {\n unit.numerator = unit.numerator.concat(other.unit.denominator).sort();\n unit.denominator = unit.denominator.concat(other.unit.numerator).sort();\n unit.cancel();\n }\n return new Dimension(value, unit);\n }\n\n compare(other) {\n let a;\n let b;\n\n if (!(other instanceof Dimension)) {\n return undefined;\n }\n\n if (this.unit.isEmpty() || other.unit.isEmpty()) {\n a = this;\n b = other;\n } else {\n a = this.unify();\n b = other.unify();\n if (a.unit.compare(b.unit) !== 0) {\n return undefined;\n }\n }\n\n return Node.numericCompare(a.value, b.value);\n }\n\n unify() {\n return this.convertTo({ length: 'px', duration: 's', angle: 'rad' });\n }\n\n convertTo(conversions) {\n let value = this.value;\n const unit = this.unit.clone();\n let i;\n let groupName;\n let group;\n let targetUnit;\n let derivedConversions = {};\n let applyUnit;\n\n if (typeof conversions === 'string') {\n for (i in unitConversions) {\n if (unitConversions[i].hasOwnProperty(conversions)) {\n derivedConversions = {};\n derivedConversions[i] = conversions;\n }\n }\n conversions = derivedConversions;\n }\n applyUnit = (atomicUnit, denominator) => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit)) {\n if (denominator) {\n value = value / (group[atomicUnit] / group[targetUnit]);\n } else {\n value = value * (group[atomicUnit] / group[targetUnit]);\n }\n\n return targetUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in conversions) {\n if (conversions.hasOwnProperty(groupName)) {\n targetUnit = conversions[groupName];\n group = unitConversions[groupName];\n\n unit.map(applyUnit);\n }\n }\n\n unit.cancel();\n\n return new Dimension(value, unit);\n }\n}\n\nDimension.prototype.type = 'Dimension';\nexport default Dimension;\n","import Node from './node';\nimport Color from './color';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Operation extends Node {\n constructor(op, operands, isSpaced) {\n this.op = op.trim();\n this.operands = operands;\n this.isSpaced = isSpaced;\n }\n\n accept(visitor) {\n this.operands = visitor.visitArray(this.operands);\n }\n\n eval(context) {\n let a = this.operands[0].eval(context);\n let b = this.operands[1].eval(context);\n let op;\n\n if (context.isMathOn(this.op)) {\n op = this.op === './' ? '/' : this.op;\n if (a instanceof Dimension && b instanceof Color) {\n a = a.toColor();\n }\n if (b instanceof Dimension && a instanceof Color) {\n b = b.toColor();\n }\n if (!a.operate) {\n if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n throw { type: 'Operation',\n message: 'Operation on an invalid type' };\n }\n\n return a.operate(context, op, b);\n } else {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n }\n\n genCSS(context, output) {\n this.operands[0].genCSS(context, output);\n if (this.isSpaced) {\n output.add(' ');\n }\n output.add(this.op);\n if (this.isSpaced) {\n output.add(' ');\n }\n this.operands[1].genCSS(context, output);\n }\n}\n\nOperation.prototype.type = 'Operation';\nexport default Operation;\n","import Node from './node';\nimport Paren from './paren';\nimport Comment from './comment';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\nclass Expression extends Node {\n constructor(value, noSpacing) {\n this.value = value;\n this.noSpacing = noSpacing;\n if (!value) {\n throw new Error('Expression requires an array parameter');\n }\n }\n\n accept(visitor) {\n this.value = visitor.visitArray(this.value);\n }\n\n eval(context) {\n let returnValue;\n const mathOn = context.isMathOn();\n\n const inParenthesis = this.parens && \n (context.math !== MATH.STRICT_LEGACY || !this.parensInOp);\n\n let doubleParen = false;\n if (inParenthesis) {\n context.inParenthesis();\n }\n if (this.value.length > 1) {\n returnValue = new Expression(this.value.map(e => {\n if (!e.eval) {\n return e;\n }\n return e.eval(context);\n }), this.noSpacing);\n } else if (this.value.length === 1) {\n if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) {\n doubleParen = true;\n }\n returnValue = this.value[0].eval(context);\n } else {\n returnValue = this;\n }\n if (inParenthesis) {\n context.outOfParenthesis();\n }\n if (this.parens && this.parensInOp && !mathOn && !doubleParen \n && (!(returnValue instanceof Dimension))) {\n returnValue = new Paren(returnValue);\n }\n return returnValue;\n }\n\n genCSS(context, output) {\n for (let i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (!this.noSpacing && i + 1 < this.value.length) {\n output.add(' ');\n }\n }\n }\n\n throwAwayComments() {\n this.value = this.value.filter(v => !(v instanceof Comment));\n }\n}\n\nExpression.prototype.type = 'Expression';\nexport default Expression;\n","import Expression from '../tree/expression';\n\nclass functionCaller {\n constructor(name, context, index, currentFileInfo) {\n this.name = name.toLowerCase();\n this.index = index;\n this.context = context;\n this.currentFileInfo = currentFileInfo;\n\n this.func = context.frames[0].functionRegistry.get(this.name);\n }\n\n isValid() {\n return Boolean(this.func);\n }\n\n call(args) {\n // This code is terrible and should be replaced as per this issue...\n // https://github.com/less/less.js/issues/2477\n if (Array.isArray(args)) {\n args = args.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n })\n .map(item => {\n if (item.type === 'Expression') {\n const subNodes = item.value.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n });\n if (subNodes.length === 1) {\n return subNodes[0];\n } else {\n return new Expression(subNodes);\n }\n }\n return item;\n });\n }\n\n return this.func(...args);\n }\n}\n\nexport default functionCaller;\n","import Node from './node';\nimport Anonymous from './anonymous';\nimport FunctionCaller from '../functions/function-caller';\n\n//\n// A function call node.\n//\nclass Call extends Node {\n constructor(name, args, index, currentFileInfo) {\n this.name = name;\n this.args = args;\n this.calc = name === 'calc';\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n accept(visitor) {\n if (this.args) {\n this.args = visitor.visitArray(this.args);\n }\n }\n\n //\n // When evaluating a function call,\n // we either find the function in the functionRegistry,\n // in which case we call it, passing the evaluated arguments,\n // if this returns null or we cannot find the function, we\n // simply print it out as it appeared originally [2].\n //\n // The reason why we evaluate the arguments, is in the case where\n // we try to pass a variable to a function, like: `saturate(@color)`.\n // The function should receive the value, not the variable.\n //\n eval(context) {\n /**\n * Turn off math for calc(), and switch back on for evaluating nested functions\n */\n const currentMathContext = context.mathOn;\n context.mathOn = !this.calc;\n if (this.calc || context.inCalc) {\n context.enterCalc();\n }\n const args = this.args.map(a => a.eval(context));\n if (this.calc || context.inCalc) {\n context.exitCalc();\n }\n context.mathOn = currentMathContext;\n\n let result;\n const funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo());\n\n if (funcCaller.isValid()) {\n try {\n result = funcCaller.call(args);\n } catch (e) {\n throw { \n type: e.type || 'Runtime',\n message: `error evaluating function \\`${this.name}\\`${e.message ? `: ${e.message}` : ''}`,\n index: this.getIndex(), \n filename: this.fileInfo().filename,\n line: e.lineNumber,\n column: e.columnNumber\n };\n }\n\n if (result !== null && result !== undefined) {\n // Results that that are not nodes are cast as Anonymous nodes\n // Falsy values or booleans are returned as empty nodes\n if (!(result instanceof Node)) {\n if (!result || result === true) {\n result = new Anonymous(null); \n }\n else {\n result = new Anonymous(result.toString()); \n }\n \n }\n result._index = this._index;\n result._fileInfo = this._fileInfo;\n return result;\n }\n\n }\n\n return new Call(this.name, args, this.getIndex(), this.fileInfo());\n }\n\n genCSS(context, output) {\n output.add(`${this.name}(`, this.fileInfo(), this.getIndex());\n\n for (let i = 0; i < this.args.length; i++) {\n this.args[i].genCSS(context, output);\n if (i + 1 < this.args.length) {\n output.add(', ');\n }\n }\n\n output.add(')');\n }\n}\n\nCall.prototype.type = 'Call';\nexport default Call;\n","import Node from './node';\nimport Call from './call';\n\nclass Variable extends Node {\n constructor(name, index, currentFileInfo) {\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let variable;\n let name = this.name;\n\n if (name.indexOf('@@') === 0) {\n name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`;\n }\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive variable definition for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n variable = this.find(context.frames, frame => {\n const v = frame.variable(name);\n if (v) {\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n // If in calc, wrap vars in a function call to cascade evaluate args first\n if (context.inCalc) {\n return (new Call('_SELF', [v.value])).eval(context);\n }\n else {\n return v.value.eval(context);\n }\n }\n });\n if (variable) {\n this.evaluating = false;\n return variable;\n } else {\n throw { type: 'Name',\n message: `variable ${name} is undefined`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nVariable.prototype.type = 'Variable';\nexport default Variable;\n","import Node from './node';\nimport Declaration from './declaration';\n\nclass Property extends Node {\n constructor(name, index, currentFileInfo) {\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let property;\n const name = this.name;\n // TODO: shorten this reference\n const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules;\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive property reference for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n property = this.find(context.frames, frame => {\n let v;\n const vArr = frame.property(name);\n if (vArr) {\n for (let i = 0; i < vArr.length; i++) {\n v = vArr[i];\n\n vArr[i] = new Declaration(v.name,\n v.value,\n v.important,\n v.merge,\n v.index,\n v.currentFileInfo,\n v.inline,\n v.variable\n );\n }\n mergeRules(vArr);\n\n v = vArr[vArr.length - 1];\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n v = v.value.eval(context);\n return v;\n }\n });\n if (property) {\n this.evaluating = false;\n return property;\n } else {\n throw { type: 'Name',\n message: `Property '${name}' is undefined`,\n filename: this.currentFileInfo.filename,\n index: this.index };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nProperty.prototype.type = 'Property';\nexport default Property;\n","import Node from './node';\n\nclass Attribute extends Node {\n constructor(key, op, value) {\n this.key = key;\n this.op = op;\n this.value = value;\n }\n\n eval(context) {\n return new Attribute(this.key.eval ? this.key.eval(context) : this.key,\n this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value);\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context) {\n let value = this.key.toCSS ? this.key.toCSS(context) : this.key;\n\n if (this.op) {\n value += this.op;\n value += (this.value.toCSS ? this.value.toCSS(context) : this.value);\n }\n\n return `[${value}]`;\n }\n}\n\nAttribute.prototype.type = 'Attribute';\nexport default Attribute;\n","import Node from './node';\nimport Variable from './variable';\nimport Property from './property';\n\nclass Quoted extends Node {\n constructor(str, content, escaped, index, currentFileInfo) {\n this.escaped = (escaped == null) ? true : escaped;\n this.value = content || '';\n this.quote = str.charAt(0);\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.variableRegex = /@\\{([\\w-]+)\\}/g;\n this.propRegex = /\\$\\{([\\w-]+)\\}/g;\n }\n\n genCSS(context, output) {\n if (!this.escaped) {\n output.add(this.quote, this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n if (!this.escaped) {\n output.add(this.quote);\n }\n }\n\n containsVariables() {\n return this.value.match(this.variableRegex);\n }\n\n eval(context) {\n const that = this;\n let value = this.value;\n const variableReplacement = (_, name) => {\n const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n const propertyReplacement = (_, name) => {\n const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n function iterativeReplace(value, regexp, replacementFnc) {\n let evaluatedValue = value;\n do {\n value = evaluatedValue.toString();\n evaluatedValue = value.replace(regexp, replacementFnc);\n } while (value !== evaluatedValue);\n return evaluatedValue;\n }\n value = iterativeReplace(value, this.variableRegex, variableReplacement);\n value = iterativeReplace(value, this.propRegex, propertyReplacement);\n return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo());\n }\n\n compare(other) {\n // when comparing quoted strings allow the quote to differ\n if (other.type === 'Quoted' && !this.escaped && !other.escaped) {\n return Node.numericCompare(this.value, other.value);\n } else {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n }\n}\n\nQuoted.prototype.type = 'Quoted';\nexport default Quoted;\n","import Node from './node';\n\nclass URL extends Node {\n constructor(val, index, currentFileInfo, isEvald) {\n this.value = val;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.isEvald = isEvald;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n genCSS(context, output) {\n output.add('url(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n const val = this.value.eval(context);\n let rootpath;\n\n if (!this.isEvald) {\n // Add the rootpath if the URL requires a rewrite\n rootpath = this.fileInfo() && this.fileInfo().rootpath;\n if (typeof rootpath === 'string' &&\n typeof val.value === 'string' &&\n context.pathRequiresRewrite(val.value)) {\n if (!val.quote) {\n rootpath = escapePath(rootpath);\n }\n val.value = context.rewritePath(val.value, rootpath);\n } else {\n val.value = context.normalizePath(val.value);\n }\n\n // Add url args if enabled\n if (context.urlArgs) {\n if (!val.value.match(/^\\s*data:/)) {\n const delimiter = val.value.indexOf('?') === -1 ? '?' : '&';\n const urlArgs = delimiter + context.urlArgs;\n if (val.value.indexOf('#') !== -1) {\n val.value = val.value.replace('#', `${urlArgs}#`);\n } else {\n val.value += urlArgs;\n }\n }\n }\n }\n\n return new URL(val, this.getIndex(), this.fileInfo(), true);\n }\n}\n\nURL.prototype.type = 'Url';\n\nfunction escapePath(path) {\n return path.replace(/[\\(\\)'\"\\s]/g, match => `\\\\${match}`);\n}\n\nexport default URL;\n","import Ruleset from './ruleset';\nimport Value from './value';\nimport Selector from './selector';\nimport Anonymous from './anonymous';\nimport Expression from './expression';\nimport AtRule from './atrule';\nimport * as utils from '../utils';\n\nclass Media extends AtRule {\n constructor(value, features, index, currentFileInfo, visibilityInfo) {\n this._index = index;\n this._fileInfo = currentFileInfo;\n\n const selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors();\n\n this.features = new Value(features);\n this.rules = [new Ruleset(selectors, value)];\n this.rules[0].allowImports = true;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n this.setParent(selectors, this);\n this.setParent(this.features, this);\n this.setParent(this.rules, this);\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n if (this.rules) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n genCSS(context, output) {\n output.add('@media ', this._fileInfo, this._index);\n this.features.genCSS(context, output);\n this.outputRuleset(context, output, this.rules);\n }\n\n eval(context) {\n if (!context.mediaBlocks) {\n context.mediaBlocks = [];\n context.mediaPath = [];\n }\n\n const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo());\n if (this.debugInfo) {\n this.rules[0].debugInfo = this.debugInfo;\n media.debugInfo = this.debugInfo;\n }\n \n media.features = this.features.eval(context);\n\n context.mediaPath.push(media);\n context.mediaBlocks.push(media);\n\n this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit();\n context.frames.unshift(this.rules[0]);\n media.rules = [this.rules[0].eval(context)];\n context.frames.shift();\n\n context.mediaPath.pop();\n\n return context.mediaPath.length === 0 ? media.evalTop(context) :\n media.evalNested(context);\n }\n\n evalTop(context) {\n let result = this;\n\n // Render all dependent Media blocks.\n if (context.mediaBlocks.length > 1) {\n const selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors();\n result = new Ruleset(selectors, context.mediaBlocks);\n result.multiMedia = true;\n result.copyVisibilityInfo(this.visibilityInfo());\n this.setParent(result, this);\n }\n\n delete context.mediaBlocks;\n delete context.mediaPath;\n\n return result;\n }\n\n evalNested(context) {\n let i;\n let value;\n const path = context.mediaPath.concat([this]);\n\n // Extract the media-query conditions separated with `,` (OR).\n for (i = 0; i < path.length; i++) {\n value = path[i].features instanceof Value ?\n path[i].features.value : path[i].features;\n path[i] = Array.isArray(value) ? value : [value];\n }\n\n // Trace all permutations to generate the resulting media-query.\n //\n // (a, b and c) with nested (d, e) ->\n // a and d\n // a and e\n // b and c and d\n // b and c and e\n this.features = new Value(this.permute(path).map(path => {\n path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment));\n\n for (i = path.length - 1; i > 0; i--) {\n path.splice(i, 0, new Anonymous('and'));\n }\n\n return new Expression(path);\n }));\n this.setParent(this.features, this);\n\n // Fake a tree-node that doesn't output anything.\n return new Ruleset([], []);\n }\n\n permute(arr) {\n if (arr.length === 0) {\n return [];\n } else if (arr.length === 1) {\n return arr[0];\n } else {\n const result = [];\n const rest = this.permute(arr.slice(1));\n for (let i = 0; i < rest.length; i++) {\n for (let j = 0; j < arr[0].length; j++) {\n result.push([arr[0][j]].concat(rest[i]));\n }\n }\n return result;\n }\n }\n\n bubbleSelectors(selectors) {\n if (!selectors) {\n return;\n }\n this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])];\n this.setParent(this.rules, this);\n }\n}\n\nMedia.prototype.type = 'Media';\nexport default Media;\n","import Node from './node';\nimport Media from './media';\nimport URL from './url';\nimport Quoted from './quoted';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\nimport * as utils from '../utils';\nimport LessError from '../less-error';\n\n//\n// CSS @import node\n//\n// The general strategy here is that we don't want to wait\n// for the parsing to be completed, before we start importing\n// the file. That's because in the context of a browser,\n// most of the time will be spent waiting for the server to respond.\n//\n// On creation, we push the import path to our import queue, though\n// `import,push`, we also pass it a callback, which it'll call once\n// the file has been fetched, and parsed.\n//\nclass Import extends Node {\n constructor(path, features, options, index, currentFileInfo, visibilityInfo) {\n this.options = options;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.path = path;\n this.features = features;\n this.allowRoot = true;\n\n if (this.options.less !== undefined || this.options.inline) {\n this.css = !this.options.less || this.options.inline;\n } else {\n const pathValue = this.getPath();\n if (pathValue && /[#\\.\\&\\?]css([\\?;].*)?$/.test(pathValue)) {\n this.css = true;\n }\n }\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.features, this);\n this.setParent(this.path, this);\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n this.path = visitor.visit(this.path);\n if (!this.options.isPlugin && !this.options.inline && this.root) {\n this.root = visitor.visit(this.root);\n }\n }\n\n genCSS(context, output) {\n if (this.css && this.path._fileInfo.reference === undefined) {\n output.add('@import ', this._fileInfo, this._index);\n this.path.genCSS(context, output);\n if (this.features) {\n output.add(' ');\n this.features.genCSS(context, output);\n }\n output.add(';');\n }\n }\n\n getPath() {\n return (this.path instanceof URL) ?\n this.path.value.value : this.path.value;\n }\n\n isVariableImport() {\n let path = this.path;\n if (path instanceof URL) {\n path = path.value;\n }\n if (path instanceof Quoted) {\n return path.containsVariables();\n }\n\n return true;\n }\n\n evalForImport(context) {\n let path = this.path;\n\n if (path instanceof URL) {\n path = path.value;\n }\n\n return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo());\n }\n\n evalPath(context) {\n const path = this.path.eval(context);\n const fileInfo = this._fileInfo;\n\n if (!(path instanceof URL)) {\n // Add the rootpath if the URL requires a rewrite\n const pathValue = path.value;\n if (fileInfo &&\n pathValue &&\n context.pathRequiresRewrite(pathValue)) {\n path.value = context.rewritePath(pathValue, fileInfo.rootpath);\n } else {\n path.value = context.normalizePath(path.value);\n }\n }\n\n return path;\n }\n\n eval(context) {\n const result = this.doEval(context);\n if (this.options.reference || this.blocksVisibility()) {\n if (result.length || result.length === 0) {\n result.forEach(node => {\n node.addVisibilityBlock();\n }\n );\n } else {\n result.addVisibilityBlock();\n }\n }\n return result;\n }\n\n doEval(context) {\n let ruleset;\n let registry;\n const features = this.features && this.features.eval(context);\n\n if (this.options.isPlugin) {\n if (this.root && this.root.eval) {\n try {\n this.root.eval(context);\n }\n catch (e) {\n e.message = 'Plugin error during evaluation';\n throw new LessError(e, this.root.imports, this.root.filename);\n }\n }\n registry = context.frames[0] && context.frames[0].functionRegistry;\n if ( registry && this.root && this.root.functions ) {\n registry.addMultiple( this.root.functions );\n }\n\n return [];\n }\n\n if (this.skip) {\n if (typeof this.skip === 'function') {\n this.skip = this.skip();\n }\n if (this.skip) {\n return [];\n }\n }\n if (this.options.inline) {\n const contents = new Anonymous(this.root, 0,\n {\n filename: this.importedFilename,\n reference: this.path._fileInfo && this.path._fileInfo.reference\n }, true, true);\n\n return this.features ? new Media([contents], this.features.value) : [contents];\n } else if (this.css) {\n const newImport = new Import(this.evalPath(context), features, this.options, this._index);\n if (!newImport.css && this.error) {\n throw this.error;\n }\n return newImport;\n } else {\n ruleset = new Ruleset(null, utils.copyArray(this.root.rules));\n ruleset.evalImports(context);\n\n return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules;\n }\n }\n}\n\nImport.prototype.type = 'Import';\nexport default Import;\n","import Node from './node';\nimport Variable from './variable';\n\nconst JsEvalNode = () => {\n};\nJsEvalNode.prototype = new Node();\n\nJsEvalNode.prototype.evaluateJavaScript = function (expression, context) {\n let result;\n const that = this;\n const evalContext = {};\n\n if (!context.javascriptEnabled) {\n throw { message: 'Inline JavaScript is not enabled. Is it set in your options?',\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n expression = expression.replace(/@\\{([\\w-]+)\\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context)));\n\n try {\n expression = new Function(`return (${expression})`);\n } catch (e) {\n throw { message: `JavaScript evaluation error: ${e.message} from \\`${expression}\\`` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n const variables = context.frames[0].variables();\n for (const k in variables) {\n if (variables.hasOwnProperty(k)) {\n /* jshint loopfunc:true */\n evalContext[k.slice(1)] = {\n value: variables[k].value,\n toJS: function () {\n return this.value.eval(context).toCSS();\n }\n };\n }\n }\n\n try {\n result = expression.call(evalContext);\n } catch (e) {\n throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/[\"]/g, '\\'')}'` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n return result;\n};\nJsEvalNode.prototype.jsify = obj => {\n if (Array.isArray(obj.value) && (obj.value.length > 1)) {\n return `[${obj.value.map(v => v.toCSS()).join(', ')}]`;\n } else {\n return obj.toCSS();\n }\n};\n\nexport default JsEvalNode;\n","import JsEvalNode from './js-eval-node';\nimport Dimension from './dimension';\nimport Quoted from './quoted';\nimport Anonymous from './anonymous';\n\nclass JavaScript extends JsEvalNode {\n constructor(string, escaped, index, currentFileInfo) {\n this.escaped = escaped;\n this.expression = string;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n const result = this.evaluateJavaScript(this.expression, context);\n const type = typeof result;\n\n if (type === 'number' && !isNaN(result)) {\n return new Dimension(result);\n } else if (type === 'string') {\n return new Quoted(`\"${result}\"`, result, this.escaped, this._index);\n } else if (Array.isArray(result)) {\n return new Anonymous(result.join(', '));\n } else {\n return new Anonymous(result);\n }\n }\n}\n\nJavaScript.prototype.type = 'JavaScript';\nexport default JavaScript;\n","import Node from './node';\n\nclass Assignment extends Node {\n constructor(key, val) {\n this.key = key;\n this.value = val;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval(context) {\n if (this.value.eval) {\n return new Assignment(this.key, this.value.eval(context));\n }\n return this;\n }\n\n genCSS(context, output) {\n output.add(`${this.key}=`);\n if (this.value.genCSS) {\n this.value.genCSS(context, output);\n } else {\n output.add(this.value);\n }\n }\n}\n\nAssignment.prototype.type = 'Assignment';\nexport default Assignment;\n","import Node from './node';\n\nclass Condition extends Node {\n constructor(op, l, r, i, negate) {\n this.op = op.trim();\n this.lvalue = l;\n this.rvalue = r;\n this._index = i;\n this.negate = negate;\n }\n\n accept(visitor) {\n this.lvalue = visitor.visit(this.lvalue);\n this.rvalue = visitor.visit(this.rvalue);\n }\n\n eval(context) {\n const result = ((op, a, b) => {\n switch (op) {\n case 'and': return a && b;\n case 'or': return a || b;\n default:\n switch (Node.compare(a, b)) {\n case -1:\n return op === '<' || op === '=<' || op === '<=';\n case 0:\n return op === '=' || op === '>=' || op === '=<' || op === '<=';\n case 1:\n return op === '>' || op === '>=';\n default:\n return false;\n }\n }\n })(this.op, this.lvalue.eval(context), this.rvalue.eval(context));\n\n return this.negate ? !result : result;\n }\n}\n\nCondition.prototype.type = 'Condition';\nexport default Condition;\n","import Node from './node';\n\nclass UnicodeDescriptor extends Node {\n constructor(value) {\n this.value = value;\n }\n}\n\nUnicodeDescriptor.prototype.type = 'UnicodeDescriptor';\n\nexport default UnicodeDescriptor;\n","import Node from './node';\nimport Operation from './operation';\nimport Dimension from './dimension';\n\nclass Negative extends Node {\n constructor(node) {\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('-');\n this.value.genCSS(context, output);\n }\n\n eval(context) {\n if (context.isMathOn()) {\n return (new Operation('*', [new Dimension(-1), this.value])).eval(context);\n }\n return new Negative(this.value.eval(context));\n }\n}\n\nNegative.prototype.type = 'Negative';\nexport default Negative;\n","import Node from './node';\nimport Selector from './selector';\n\nclass Extend extends Node {\n constructor(selector, option, index, currentFileInfo, visibilityInfo) {\n this.selector = selector;\n this.option = option;\n this.object_id = Extend.next_id++;\n this.parent_ids = [this.object_id];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n switch (option) {\n case 'all':\n this.allowBefore = true;\n this.allowAfter = true;\n break;\n default:\n this.allowBefore = false;\n this.allowAfter = false;\n break;\n }\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n this.selector = visitor.visit(this.selector);\n }\n\n eval(context) {\n return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n clone(context) {\n return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n // it concatenates (joins) all selectors in selector array\n findSelfSelectors(selectors) {\n let selfElements = [];\n let i;\n let selectorElements;\n\n for (i = 0; i < selectors.length; i++) {\n selectorElements = selectors[i].elements;\n // duplicate the logic in genCSS function inside the selector node.\n // future TODO - move both logics into the selector joiner visitor\n if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') {\n selectorElements[0].combinator.value = ' ';\n }\n selfElements = selfElements.concat(selectors[i].elements);\n }\n\n this.selfSelectors = [new Selector(selfElements)];\n this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo());\n }\n}\n\nExtend.next_id = 0;\n\nExtend.prototype.type = 'Extend';\nexport default Extend;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport DetachedRuleset from './detached-ruleset';\nimport LessError from '../less-error';\n\nclass VariableCall extends Node {\n constructor(variable, index, currentFileInfo) {\n this.variable = variable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n eval(context) {\n let rules;\n let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context);\n const error = new LessError({message: `Could not evaluate variable call ${this.variable}`});\n\n if (!detachedRuleset.ruleset) {\n if (detachedRuleset.rules) {\n rules = detachedRuleset;\n }\n else if (Array.isArray(detachedRuleset)) {\n rules = new Ruleset('', detachedRuleset);\n }\n else if (Array.isArray(detachedRuleset.value)) {\n rules = new Ruleset('', detachedRuleset.value);\n }\n else {\n throw error;\n }\n detachedRuleset = new DetachedRuleset(rules);\n }\n if (detachedRuleset.ruleset) {\n return detachedRuleset.callEval(context);\n }\n throw error;\n }\n}\n\nVariableCall.prototype.type = 'VariableCall';\nexport default VariableCall;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport Selector from './selector';\n\nclass NamespaceValue extends Node {\n constructor(ruleCall, lookups, important, index, fileInfo) {\n this.value = ruleCall;\n this.lookups = lookups;\n this.important = important;\n this._index = index;\n this._fileInfo = fileInfo;\n }\n\n eval(context) {\n let i;\n let j;\n let name;\n let rules = this.value.eval(context);\n\n for (i = 0; i < this.lookups.length; i++) {\n name = this.lookups[i];\n\n /**\n * Eval'd DRs return rulesets.\n * Eval'd mixins return rules, so let's make a ruleset if we need it.\n * We need to do this because of late parsing of values\n */\n if (Array.isArray(rules)) {\n rules = new Ruleset([new Selector()], rules);\n }\n\n if (name === '') {\n rules = rules.lastDeclaration();\n }\n else if (name.charAt(0) === '@') {\n if (name.charAt(1) === '@') {\n name = `@${new Variable(name.substr(1)).eval(context).value}`;\n }\n if (rules.variables) {\n rules = rules.variable(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `variable ${name} not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n else {\n if (name.substring(0, 2) === '$@') {\n name = `$${new Variable(name.substr(1)).eval(context).value}`;\n }\n else {\n name = name.charAt(0) === '$' ? name : `$${name}`;\n }\n if (rules.properties) {\n rules = rules.property(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `property \"${name.substr(1)}\" not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n // Properties are an array of values, since a ruleset can have multiple props.\n // We pick the last one (the \"cascaded\" value)\n rules = rules[rules.length - 1];\n }\n\n if (rules.value) {\n rules = rules.eval(context).value;\n }\n if (rules.ruleset) {\n rules = rules.ruleset.eval(context);\n }\n }\n return rules;\n }\n}\n\nNamespaceValue.prototype.type = 'NamespaceValue';\nexport default NamespaceValue;\n","import Selector from './selector';\nimport Element from './element';\nimport Ruleset from './ruleset';\nimport Declaration from './declaration';\nimport DetachedRuleset from './detached-ruleset';\nimport Expression from './expression';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass Definition extends Ruleset {\n constructor(name, params, rules, condition, variadic, frames, visibilityInfo) {\n this.name = name || 'anonymous mixin';\n this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])];\n this.params = params;\n this.condition = condition;\n this.variadic = variadic;\n this.arity = params.length;\n this.rules = rules;\n this._lookups = {};\n const optionalParameters = [];\n this.required = params.reduce((count, p) => {\n if (!p.name || (p.name && !p.value)) {\n return count + 1;\n }\n else {\n optionalParameters.push(p.name);\n return count;\n }\n }, 0);\n this.optionalParameters = optionalParameters;\n this.frames = frames;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n if (this.params && this.params.length) {\n this.params = visitor.visitArray(this.params);\n }\n this.rules = visitor.visitArray(this.rules);\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n evalParams(context, mixinEnv, args, evaldArguments) {\n /* jshint boss:true */\n const frame = new Ruleset(null, null);\n\n let varargs;\n let arg;\n const params = utils.copyArray(this.params);\n let i;\n let j;\n let val;\n let name;\n let isNamedFound;\n let argIndex;\n let argsLength = 0;\n\n if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) {\n frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit();\n }\n mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames));\n\n if (args) {\n args = utils.copyArray(args);\n argsLength = args.length;\n\n for (i = 0; i < argsLength; i++) {\n arg = args[i];\n if (name = (arg && arg.name)) {\n isNamedFound = false;\n for (j = 0; j < params.length; j++) {\n if (!evaldArguments[j] && name === params[j].name) {\n evaldArguments[j] = arg.value.eval(context);\n frame.prependRule(new Declaration(name, arg.value.eval(context)));\n isNamedFound = true;\n break;\n }\n }\n if (isNamedFound) {\n args.splice(i, 1);\n i--;\n continue;\n } else {\n throw { type: 'Runtime', message: `Named argument for ${this.name} ${args[i].name} not found` };\n }\n }\n }\n }\n argIndex = 0;\n for (i = 0; i < params.length; i++) {\n if (evaldArguments[i]) { continue; }\n\n arg = args && args[argIndex];\n\n if (name = params[i].name) {\n if (params[i].variadic) {\n varargs = [];\n for (j = argIndex; j < argsLength; j++) {\n varargs.push(args[j].value.eval(context));\n }\n frame.prependRule(new Declaration(name, new Expression(varargs).eval(context)));\n } else {\n val = arg && arg.value;\n if (val) {\n // This was a mixin call, pass in a detached ruleset of it's eval'd rules\n if (Array.isArray(val)) {\n val = new DetachedRuleset(new Ruleset('', val));\n }\n else {\n val = val.eval(context);\n }\n } else if (params[i].value) {\n val = params[i].value.eval(mixinEnv);\n frame.resetCache();\n } else {\n throw { type: 'Runtime', message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` };\n }\n\n frame.prependRule(new Declaration(name, val));\n evaldArguments[i] = val;\n }\n }\n\n if (params[i].variadic && args) {\n for (j = argIndex; j < argsLength; j++) {\n evaldArguments[j] = args[j].value.eval(context);\n }\n }\n argIndex++;\n }\n\n return frame;\n }\n\n makeImportant() {\n const rules = !this.rules ? this.rules : this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant(true);\n } else {\n return r;\n }\n });\n const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames);\n return result;\n }\n\n eval(context) {\n return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames));\n }\n\n evalCall(context, args, important) {\n const _arguments = [];\n const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames;\n const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments);\n let rules;\n let ruleset;\n\n frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context)));\n\n rules = utils.copyArray(this.rules);\n\n ruleset = new Ruleset(null, rules);\n ruleset.originalRuleset = this;\n ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames)));\n if (important) {\n ruleset = ruleset.makeImportant();\n }\n return ruleset;\n }\n\n matchCondition(args, context) {\n if (this.condition && !this.condition.eval(\n new contexts.Eval(context,\n [this.evalParams(context, /* the parameter variables */\n new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])]\n .concat(this.frames || []) // the parent namespace/mixin frames\n .concat(context.frames)))) { // the current environment frames\n return false;\n }\n return true;\n }\n\n matchArgs(args, context) {\n const allArgsCnt = (args && args.length) || 0;\n let len;\n const optionalParameters = this.optionalParameters;\n const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => {\n if (optionalParameters.indexOf(p.name) < 0) {\n return count + 1;\n } else {\n return count;\n }\n }, 0);\n\n if (!this.variadic) {\n if (requiredArgsCnt < this.required) {\n return false;\n }\n if (allArgsCnt > this.params.length) {\n return false;\n }\n } else {\n if (requiredArgsCnt < (this.required - 1)) {\n return false;\n }\n }\n\n // check patterns\n len = Math.min(requiredArgsCnt, this.arity);\n\n for (let i = 0; i < len; i++) {\n if (!this.params[i].name && !this.params[i].variadic) {\n if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) {\n return false;\n }\n }\n }\n return true;\n }\n}\n\nDefinition.prototype.type = 'MixinDefinition';\nDefinition.prototype.evalFirst = true;\nexport default Definition;\n","import Node from './node';\nimport Selector from './selector';\nimport MixinDefinition from './mixin-definition';\nimport defaultFunc from '../functions/default';\n\nclass MixinCall extends Node {\n constructor(elements, args, index, currentFileInfo, important) {\n this.selector = new Selector(elements);\n this.arguments = args || [];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.important = important;\n this.allowRoot = true;\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n if (this.selector) {\n this.selector = visitor.visit(this.selector);\n }\n if (this.arguments.length) {\n this.arguments = visitor.visitArray(this.arguments);\n }\n }\n\n eval(context) {\n let mixins;\n let mixin;\n let mixinPath;\n const args = [];\n let arg;\n let argValue;\n const rules = [];\n let match = false;\n let i;\n let m;\n let f;\n let isRecursive;\n let isOneFound;\n const candidates = [];\n let candidate;\n const conditionResult = [];\n let defaultResult;\n const defFalseEitherCase = -1;\n const defNone = 0;\n const defTrue = 1;\n const defFalse = 2;\n let count;\n let originalRuleset;\n let noArgumentsFilter;\n\n this.selector = this.selector.eval(context);\n\n function calcDefGroup(mixin, mixinPath) {\n let f;\n let p;\n let namespace;\n\n for (f = 0; f < 2; f++) {\n conditionResult[f] = true;\n defaultFunc.value(f);\n for (p = 0; p < mixinPath.length && conditionResult[f]; p++) {\n namespace = mixinPath[p];\n if (namespace.matchCondition) {\n conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context);\n }\n }\n if (mixin.matchCondition) {\n conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context);\n }\n }\n if (conditionResult[0] || conditionResult[1]) {\n if (conditionResult[0] != conditionResult[1]) {\n return conditionResult[1] ?\n defTrue : defFalse;\n }\n\n return defNone;\n }\n return defFalseEitherCase;\n }\n\n for (i = 0; i < this.arguments.length; i++) {\n arg = this.arguments[i];\n argValue = arg.value.eval(context);\n if (arg.expand && Array.isArray(argValue.value)) {\n argValue = argValue.value;\n for (m = 0; m < argValue.length; m++) {\n args.push({value: argValue[m]});\n }\n } else {\n args.push({name: arg.name, value: argValue});\n }\n }\n\n noArgumentsFilter = rule => rule.matchArgs(null, context);\n\n for (i = 0; i < context.frames.length; i++) {\n if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) {\n isOneFound = true;\n\n // To make `default()` function independent of definition order we have two \"subpasses\" here.\n // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`),\n // and build candidate list with corresponding flags. Then, when we know all possible matches,\n // we make a final decision.\n\n for (m = 0; m < mixins.length; m++) {\n mixin = mixins[m].rule;\n mixinPath = mixins[m].path;\n isRecursive = false;\n for (f = 0; f < context.frames.length; f++) {\n if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) {\n isRecursive = true;\n break;\n }\n }\n if (isRecursive) {\n continue;\n }\n\n if (mixin.matchArgs(args, context)) {\n candidate = {mixin, group: calcDefGroup(mixin, mixinPath)};\n\n if (candidate.group !== defFalseEitherCase) {\n candidates.push(candidate);\n }\n\n match = true;\n }\n }\n\n defaultFunc.reset();\n\n count = [0, 0, 0];\n for (m = 0; m < candidates.length; m++) {\n count[candidates[m].group]++;\n }\n\n if (count[defNone] > 0) {\n defaultResult = defFalse;\n } else {\n defaultResult = defTrue;\n if ((count[defTrue] + count[defFalse]) > 1) {\n throw { type: 'Runtime',\n message: `Ambiguous use of \\`default()\\` found when matching for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n for (m = 0; m < candidates.length; m++) {\n candidate = candidates[m].group;\n if ((candidate === defNone) || (candidate === defaultResult)) {\n try {\n mixin = candidates[m].mixin;\n if (!(mixin instanceof MixinDefinition)) {\n originalRuleset = mixin.originalRuleset || mixin;\n mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo());\n mixin.originalRuleset = originalRuleset;\n }\n const newRules = mixin.evalCall(context, args, this.important).rules;\n this._setVisibilityToReplacement(newRules);\n Array.prototype.push.apply(rules, newRules);\n } catch (e) {\n throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack };\n }\n }\n }\n\n if (match) {\n return rules;\n }\n }\n }\n if (isOneFound) {\n throw { type: 'Runtime',\n message: `No matching definition was found for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n } else {\n throw { type: 'Name',\n message: `${this.selector.toCSS().trim()} is undefined`,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n _setVisibilityToReplacement(replacement) {\n let i;\n let rule;\n if (this.blocksVisibility()) {\n for (i = 0; i < replacement.length; i++) {\n rule = replacement[i];\n rule.addVisibilityBlock();\n }\n }\n }\n\n format(args) {\n return `${this.selector.toCSS().trim()}(${args ? args.map(a => {\n let argValue = '';\n if (a.name) {\n argValue += `${a.name}:`;\n }\n if (a.value.toCSS) {\n argValue += a.value.toCSS();\n } else {\n argValue += '???';\n }\n return argValue;\n }).join(', ') : ''})`;\n }\n}\n\nMixinCall.prototype.type = 'MixinCall';\nexport default MixinCall;\n","const tree = Object.create(null);\n\nimport Node from './node';\nimport Color from './color';\nimport AtRule from './atrule';\nimport DetachedRuleset from './detached-ruleset';\nimport Operation from './operation';\nimport Dimension from './dimension';\nimport Unit from './unit';\nimport Keyword from './keyword';\nimport Variable from './variable';\nimport Property from './property';\nimport Ruleset from './ruleset';\nimport Element from './element';\nimport Attribute from './attribute';\nimport Combinator from './combinator';\nimport Selector from './selector';\nimport Quoted from './quoted';\nimport Expression from './expression';\nimport Declaration from './declaration';\nimport Call from './call';\nimport URL from './url';\nimport Import from './import';\nimport Comment from './comment';\nimport Anonymous from './anonymous';\nimport Value from './value';\nimport JavaScript from './javascript';\nimport Assignment from './assignment';\nimport Condition from './condition';\nimport Paren from './paren';\nimport Media from './media';\nimport UnicodeDescriptor from './unicode-descriptor';\nimport Negative from './negative';\nimport Extend from './extend';\nimport VariableCall from './variable-call';\nimport NamespaceValue from './namespace-value';\n\n// mixins\nimport MixinCall from './mixin-call';\nimport MixinDefinition from './mixin-definition';\n\nexport default {\n Node, Color, AtRule, DetachedRuleset, Operation,\n Dimension, Unit, Keyword, Variable, Property,\n Ruleset, Element, Attribute, Combinator, Selector,\n Quoted, Expression, Declaration, Call, URL, Import,\n Comment, Anonymous, Value, JavaScript, Assignment,\n Condition, Paren, Media, UnicodeDescriptor, Negative,\n Extend, VariableCall, NamespaceValue,\n mixin: {\n Call: MixinCall,\n Definition: MixinDefinition\n }\n};","export default {\n error: function(msg) {\n this._fireEvent('error', msg);\n },\n warn: function(msg) {\n this._fireEvent('warn', msg);\n },\n info: function(msg) {\n this._fireEvent('info', msg);\n },\n debug: function(msg) {\n this._fireEvent('debug', msg);\n },\n addListener: function(listener) {\n this._listeners.push(listener);\n },\n removeListener: function(listener) {\n for (let i = 0; i < this._listeners.length; i++) {\n if (this._listeners[i] === listener) {\n this._listeners.splice(i, 1);\n return;\n }\n }\n },\n _fireEvent: function(type, msg) {\n for (let i = 0; i < this._listeners.length; i++) {\n const logFunction = this._listeners[i][type];\n if (logFunction) {\n logFunction(msg);\n }\n }\n },\n _listeners: []\n};\n","/**\n * @todo Document why this abstraction exists, and the relationship between\n * environment, file managers, and plugin manager\n */\n\nimport logger from '../logger';\n\nclass environment {\n constructor(externalEnvironment, fileManagers) {\n this.fileManagers = fileManagers || [];\n externalEnvironment = externalEnvironment || {};\n\n const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator'];\n const requiredFunctions = [];\n const functions = requiredFunctions.concat(optionalFunctions);\n\n for (let i = 0; i < functions.length; i++) {\n const propName = functions[i];\n const environmentFunc = externalEnvironment[propName];\n if (environmentFunc) {\n this[propName] = environmentFunc.bind(externalEnvironment);\n } else if (i < requiredFunctions.length) {\n this.warn(`missing required function in environment - ${propName}`);\n }\n }\n }\n\n getFileManager(filename, currentDirectory, options, environment, isSync) {\n\n if (!filename) {\n logger.warn('getFileManager called with no filename.. Please report this issue. continuing.');\n }\n if (currentDirectory == null) {\n logger.warn('getFileManager called with null directory.. Please report this issue. continuing.');\n }\n\n let fileManagers = this.fileManagers;\n if (options.pluginManager) {\n fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers());\n }\n for (let i = fileManagers.length - 1; i >= 0 ; i--) {\n const fileManager = fileManagers[i];\n if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) {\n return fileManager;\n }\n }\n return null;\n }\n\n addFileManager(fileManager) {\n this.fileManagers.push(fileManager);\n }\n\n clearFileManagers() {\n this.fileManagers = [];\n }\n}\n\nexport default environment;\n","const abstractFileManager = () => {\n};\n\nabstractFileManager.prototype.getPath = filename => {\n let j = filename.lastIndexOf('?');\n if (j > 0) {\n filename = filename.slice(0, j);\n }\n j = filename.lastIndexOf('/');\n if (j < 0) {\n j = filename.lastIndexOf('\\\\');\n }\n if (j < 0) {\n return '';\n }\n return filename.slice(0, j + 1);\n};\n\nabstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\\.[a-z]*$)|([\\?;].*)$/.test(path) ? path : path + ext;\n\nabstractFileManager.prototype.tryAppendLessExtension = function(path) {\n return this.tryAppendExtension(path, '.less');\n};\n\nabstractFileManager.prototype.supportsSync = () => false;\n\nabstractFileManager.prototype.alwaysMakePathsAbsolute = () => false;\n\nabstractFileManager.prototype.isPathAbsolute = filename => (/^(?:[a-z-]+:|\\/|\\\\|#)/i).test(filename);\n// TODO: pull out / replace?\nabstractFileManager.prototype.join = (basePath, laterPath) => {\n if (!basePath) {\n return laterPath;\n }\n return basePath + laterPath;\n};\n\nabstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) {\n // diff between two paths to create a relative path\n\n const urlParts = this.extractUrlParts(url);\n\n const baseUrlParts = this.extractUrlParts(baseUrl);\n let i;\n let max;\n let urlDirectories;\n let baseUrlDirectories;\n let diff = '';\n if (urlParts.hostPart !== baseUrlParts.hostPart) {\n return '';\n }\n max = Math.max(baseUrlParts.directories.length, urlParts.directories.length);\n for (i = 0; i < max; i++) {\n if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; }\n }\n baseUrlDirectories = baseUrlParts.directories.slice(i);\n urlDirectories = urlParts.directories.slice(i);\n for (i = 0; i < baseUrlDirectories.length - 1; i++) {\n diff += '../';\n }\n for (i = 0; i < urlDirectories.length - 1; i++) {\n diff += `${urlDirectories[i]}/`;\n }\n return diff;\n};\n// helper function, not part of API\nabstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) {\n // urlParts[1] = protocol://hostname/ OR /\n // urlParts[2] = / if path relative to host base\n // urlParts[3] = directories\n // urlParts[4] = filename\n // urlParts[5] = parameters\n\n const urlPartsRegex = /^((?:[a-z-]+:)?\\/{2}(?:[^\\/\\?#]*\\/)|([\\/\\\\]))?((?:[^\\/\\\\\\?#]*[\\/\\\\])*)([^\\/\\\\\\?#]*)([#\\?].*)?$/i;\n\n const urlParts = url.match(urlPartsRegex);\n const returner = {};\n let rawDirectories = [];\n const directories = [];\n let i;\n let baseUrlParts;\n\n if (!urlParts) {\n throw new Error(`Could not parse sheet href - '${url}'`);\n }\n\n // Stylesheets in IE don't always return the full path\n if (baseUrl && (!urlParts[1] || urlParts[2])) {\n baseUrlParts = baseUrl.match(urlPartsRegex);\n if (!baseUrlParts) {\n throw new Error(`Could not parse page url - '${baseUrl}'`);\n }\n urlParts[1] = urlParts[1] || baseUrlParts[1] || '';\n if (!urlParts[2]) {\n urlParts[3] = baseUrlParts[3] + urlParts[3];\n }\n }\n\n if (urlParts[3]) {\n rawDirectories = urlParts[3].replace(/\\\\/g, '/').split('/');\n\n // collapse '..' and skip '.'\n for (i = 0; i < rawDirectories.length; i++) {\n\n if (rawDirectories[i] === '..') {\n directories.pop();\n }\n else if (rawDirectories[i] !== '.') {\n directories.push(rawDirectories[i]);\n }\n \n }\n }\n\n returner.hostPart = urlParts[1];\n returner.directories = directories;\n returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/');\n returner.path = (urlParts[1] || '') + directories.join('/');\n returner.filename = urlParts[4];\n returner.fileUrl = returner.path + (urlParts[4] || '');\n returner.url = returner.fileUrl + (urlParts[5] || '');\n return returner;\n};\n\nexport default abstractFileManager;\n","import functionRegistry from '../functions/function-registry';\nimport LessError from '../less-error';\n\nclass AbstractPluginLoader {\n constructor() {\n // Implemented by Node.js plugin loader\n this.require = () => null\n }\n\n evalPlugin(contents, context, imports, pluginOptions, fileInfo) {\n let loader;\n let registry;\n let pluginObj;\n let localModule;\n let pluginManager;\n let filename;\n let result;\n\n pluginManager = context.pluginManager;\n\n if (fileInfo) {\n if (typeof fileInfo === 'string') {\n filename = fileInfo;\n }\n else {\n filename = fileInfo.filename;\n }\n }\n const shortname = (new this.less.FileManager()).extractUrlParts(filename).filename;\n\n if (filename) {\n pluginObj = pluginManager.get(filename);\n\n if (pluginObj) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n return pluginObj;\n }\n }\n localModule = {\n exports: {},\n pluginManager,\n fileInfo\n };\n registry = functionRegistry.create();\n\n const registerPlugin = obj => {\n pluginObj = obj;\n };\n\n try {\n loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents);\n loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo);\n }\n catch (e) {\n return new LessError(e, imports, filename);\n }\n\n if (!pluginObj) {\n pluginObj = localModule.exports;\n }\n pluginObj = this.validatePlugin(pluginObj, filename, shortname);\n\n if (pluginObj instanceof LessError) {\n return pluginObj;\n }\n\n if (pluginObj) {\n pluginObj.imports = imports;\n pluginObj.filename = filename;\n\n // For < 3.x (or unspecified minVersion) - setOptions() before install()\n if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n\n if (result) {\n return result;\n }\n }\n\n // Run on first load\n pluginManager.addPlugin(pluginObj, fileInfo.filename, registry);\n pluginObj.functions = registry.getLocalFunctions();\n\n // Need to call setOptions again because the pluginObj might have functions\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n\n // Run every @plugin call\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n\n }\n else {\n return new LessError({ message: 'Not a valid plugin' }, imports, filename);\n }\n\n return pluginObj;\n }\n\n trySetOptions(plugin, filename, name, options) {\n if (options && !plugin.setOptions) {\n return new LessError({\n message: `Options have been provided but the plugin ${name} does not support any options.`\n });\n }\n try {\n plugin.setOptions && plugin.setOptions(options);\n }\n catch (e) {\n return new LessError(e);\n }\n }\n\n validatePlugin(plugin, filename, name) {\n if (plugin) {\n // support plugins being a function\n // so that the plugin can be more usable programmatically\n if (typeof plugin === 'function') {\n plugin = new plugin();\n }\n\n if (plugin.minVersion) {\n if (this.compareVersion(plugin.minVersion, this.less.version) < 0) {\n return new LessError({\n message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}`\n });\n }\n }\n return plugin;\n }\n return null;\n }\n\n compareVersion(aVersion, bVersion) {\n if (typeof aVersion === 'string') {\n aVersion = aVersion.match(/^(\\d+)\\.?(\\d+)?\\.?(\\d+)?/);\n aVersion.shift();\n }\n for (let i = 0; i < aVersion.length; i++) {\n if (aVersion[i] !== bVersion[i]) {\n return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1;\n }\n }\n return 0;\n }\n\n versionToString(version) {\n let versionString = '';\n for (let i = 0; i < version.length; i++) {\n versionString += (versionString ? '.' : '') + version[i];\n }\n return versionString;\n }\n\n printUsage(plugins) {\n for (let i = 0; i < plugins.length; i++) {\n const plugin = plugins[i];\n if (plugin.printUsage) {\n plugin.printUsage();\n }\n }\n }\n}\n\nexport default AbstractPluginLoader;\n\n","import tree from '../tree';\nconst _visitArgs = { visitDeeper: true };\nlet _hasIndexed = false;\n\nfunction _noop(node) {\n return node;\n}\n\nfunction indexNodeTypes(parent, ticker) {\n // add .typeIndex to tree node types for lookup table\n let key;\n\n let child;\n for (key in parent) { \n /* eslint guard-for-in: 0 */\n child = parent[key];\n switch (typeof child) {\n case 'function':\n // ignore bound functions directly on tree which do not have a prototype\n // or aren't nodes\n if (child.prototype && child.prototype.type) {\n child.prototype.typeIndex = ticker++;\n }\n break;\n case 'object':\n ticker = indexNodeTypes(child, ticker);\n break;\n \n }\n }\n return ticker;\n}\n\nclass Visitor {\n constructor(implementation) {\n this._implementation = implementation;\n this._visitInCache = {};\n this._visitOutCache = {};\n\n if (!_hasIndexed) {\n indexNodeTypes(tree, 1);\n _hasIndexed = true;\n }\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n\n const nodeTypeIndex = node.typeIndex;\n if (!nodeTypeIndex) {\n // MixinCall args aren't a node type?\n if (node.value && node.value.typeIndex) {\n this.visit(node.value);\n }\n return node;\n }\n\n const impl = this._implementation;\n let func = this._visitInCache[nodeTypeIndex];\n let funcOut = this._visitOutCache[nodeTypeIndex];\n const visitArgs = _visitArgs;\n let fnName;\n\n visitArgs.visitDeeper = true;\n\n if (!func) {\n fnName = `visit${node.type}`;\n func = impl[fnName] || _noop;\n funcOut = impl[`${fnName}Out`] || _noop;\n this._visitInCache[nodeTypeIndex] = func;\n this._visitOutCache[nodeTypeIndex] = funcOut;\n }\n\n if (func !== _noop) {\n const newNode = func.call(impl, node, visitArgs);\n if (node && impl.isReplacing) {\n node = newNode;\n }\n }\n\n if (visitArgs.visitDeeper && node && node.accept) {\n node.accept(this);\n }\n\n if (funcOut != _noop) {\n funcOut.call(impl, node);\n }\n\n return node;\n }\n\n visitArray(nodes, nonReplacing) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n\n // Non-replacing\n if (nonReplacing || !this._implementation.isReplacing) {\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n // Replacing\n const out = [];\n for (i = 0; i < cnt; i++) {\n const evald = this.visit(nodes[i]);\n if (evald === undefined) { continue; }\n if (!evald.splice) {\n out.push(evald);\n } else if (evald.length) {\n this.flatten(evald, out);\n }\n }\n return out;\n }\n\n flatten(arr, out) {\n if (!out) {\n out = [];\n }\n\n let cnt;\n let i;\n let item;\n let nestedCnt;\n let j;\n let nestedItem;\n\n for (i = 0, cnt = arr.length; i < cnt; i++) {\n item = arr[i];\n if (item === undefined) {\n continue;\n }\n if (!item.splice) {\n out.push(item);\n continue;\n }\n\n for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) {\n nestedItem = item[j];\n if (nestedItem === undefined) {\n continue;\n }\n if (!nestedItem.splice) {\n out.push(nestedItem);\n } else if (nestedItem.length) {\n this.flatten(nestedItem, out);\n }\n }\n }\n\n return out;\n }\n}\n\nexport default Visitor;\n","class ImportSequencer {\n constructor(onSequencerEmpty) {\n this.imports = [];\n this.variableImports = [];\n this._onSequencerEmpty = onSequencerEmpty;\n this._currentDepth = 0;\n }\n\n addImport(callback) {\n const importSequencer = this;\n\n const importItem = {\n callback,\n args: null,\n isReady: false\n };\n\n this.imports.push(importItem);\n return function(...args) {\n importItem.args = Array.prototype.slice.call(args, 0);\n importItem.isReady = true;\n importSequencer.tryRun();\n };\n }\n\n addVariableImport(callback) {\n this.variableImports.push(callback);\n }\n\n tryRun() {\n this._currentDepth++;\n try {\n while (true) {\n while (this.imports.length > 0) {\n const importItem = this.imports[0];\n if (!importItem.isReady) {\n return;\n }\n this.imports = this.imports.slice(1);\n importItem.callback.apply(null, importItem.args);\n }\n if (this.variableImports.length === 0) {\n break;\n }\n const variableImport = this.variableImports[0];\n this.variableImports = this.variableImports.slice(1);\n variableImport();\n }\n } finally {\n this._currentDepth--;\n }\n if (this._currentDepth === 0 && this._onSequencerEmpty) {\n this._onSequencerEmpty();\n }\n }\n}\n\nexport default ImportSequencer;\n","import contexts from '../contexts';\nimport Visitor from './visitor';\nimport ImportSequencer from './import-sequencer';\nimport * as utils from '../utils';\n\nconst ImportVisitor = function(importer, finish) {\n\n this._visitor = new Visitor(this);\n this._importer = importer;\n this._finish = finish;\n this.context = new contexts.Eval();\n this.importCount = 0;\n this.onceFileDetectionMap = {};\n this.recursionDetector = {};\n this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this));\n};\n\nImportVisitor.prototype = {\n isReplacing: false,\n run: function (root) {\n try {\n // process the contents\n this._visitor.visit(root);\n }\n catch (e) {\n this.error = e;\n }\n\n this.isFinished = true;\n this._sequencer.tryRun();\n },\n _onSequencerEmpty: function() {\n if (!this.isFinished) {\n return;\n }\n this._finish(this.error);\n },\n visitImport: function (importNode, visitArgs) {\n const inlineCSS = importNode.options.inline;\n\n if (!importNode.css || inlineCSS) {\n\n const context = new contexts.Eval(this.context, utils.copyArray(this.context.frames));\n const importParent = context.frames[0];\n\n this.importCount++;\n if (importNode.isVariableImport()) {\n this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent));\n } else {\n this.processImportNode(importNode, context, importParent);\n }\n }\n visitArgs.visitDeeper = false;\n },\n processImportNode: function(importNode, context, importParent) {\n let evaldImportNode;\n const inlineCSS = importNode.options.inline;\n\n try {\n evaldImportNode = importNode.evalForImport(context);\n } catch (e) {\n if (!e.filename) { e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename; }\n // attempt to eval properly and treat as css\n importNode.css = true;\n // if that fails, this error will be thrown\n importNode.error = e;\n }\n\n if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) {\n if (evaldImportNode.options.multiple) {\n context.importMultiple = true;\n }\n\n // try appending if we haven't determined if it is css or not\n const tryAppendLessExtension = evaldImportNode.css === undefined;\n\n for (let i = 0; i < importParent.rules.length; i++) {\n if (importParent.rules[i] === importNode) {\n importParent.rules[i] = evaldImportNode;\n break;\n }\n }\n\n const onImported = this.onImported.bind(this, evaldImportNode, context);\n const sequencedOnImported = this._sequencer.addImport(onImported);\n\n this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(),\n evaldImportNode.options, sequencedOnImported);\n } else {\n this.importCount--;\n if (this.isFinished) {\n this._sequencer.tryRun();\n }\n }\n },\n onImported: function (importNode, context, e, root, importedAtRoot, fullPath) {\n if (e) {\n if (!e.filename) {\n e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename;\n }\n this.error = e;\n }\n\n const importVisitor = this;\n const inlineCSS = importNode.options.inline;\n const isPlugin = importNode.options.isPlugin;\n const isOptional = importNode.options.optional;\n const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector;\n\n if (!context.importMultiple) {\n if (duplicateImport) {\n importNode.skip = true;\n } else {\n importNode.skip = () => {\n if (fullPath in importVisitor.onceFileDetectionMap) {\n return true;\n }\n importVisitor.onceFileDetectionMap[fullPath] = true;\n return false;\n };\n }\n }\n\n if (!fullPath && isOptional) {\n importNode.skip = true;\n }\n\n if (root) {\n importNode.root = root;\n importNode.importedFilename = fullPath;\n\n if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) {\n importVisitor.recursionDetector[fullPath] = true;\n\n const oldContext = this.context;\n this.context = context;\n try {\n this._visitor.visit(root);\n } catch (e) {\n this.error = e;\n }\n this.context = oldContext;\n }\n }\n\n importVisitor.importCount--;\n\n if (importVisitor.isFinished) {\n importVisitor._sequencer.tryRun();\n }\n },\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.unshift(declNode);\n } else {\n visitArgs.visitDeeper = false;\n }\n },\n visitDeclarationOut: function(declNode) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.shift();\n }\n },\n visitAtRule: function (atRuleNode, visitArgs) {\n this.context.frames.unshift(atRuleNode);\n },\n visitAtRuleOut: function (atRuleNode) {\n this.context.frames.shift();\n },\n visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {\n this.context.frames.unshift(mixinDefinitionNode);\n },\n visitMixinDefinitionOut: function (mixinDefinitionNode) {\n this.context.frames.shift();\n },\n visitRuleset: function (rulesetNode, visitArgs) {\n this.context.frames.unshift(rulesetNode);\n },\n visitRulesetOut: function (rulesetNode) {\n this.context.frames.shift();\n },\n visitMedia: function (mediaNode, visitArgs) {\n this.context.frames.unshift(mediaNode.rules[0]);\n },\n visitMediaOut: function (mediaNode) {\n this.context.frames.shift();\n }\n};\nexport default ImportVisitor;\n","class SetTreeVisibilityVisitor {\n constructor(visible) {\n this.visible = visible;\n }\n\n run(root) {\n this.visit(root);\n }\n\n visitArray(nodes) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n if (node.constructor === Array) {\n return this.visitArray(node);\n }\n\n if (!node.blocksVisibility || node.blocksVisibility()) {\n return node;\n }\n if (this.visible) {\n node.ensureVisibility();\n } else {\n node.ensureInvisibility();\n }\n\n node.accept(this);\n return node;\n }\n}\n\nexport default SetTreeVisibilityVisitor;","import tree from '../tree';\nimport Visitor from './visitor';\nimport logger from '../logger';\nimport * as utils from '../utils';\n\n/* jshint loopfunc:true */\n\nclass ExtendFinderVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n this.contexts = [];\n this.allExtendsStack = [[]];\n }\n\n run(root) {\n root = this._visitor.visit(root);\n root.allExtends = this.allExtendsStack[0];\n return root;\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n\n let i;\n let j;\n let extend;\n const allSelectorsExtendList = [];\n let extendList;\n\n // get &:extend(.a); rules which apply to all selectors in this ruleset\n const rules = rulesetNode.rules;\n\n const ruleCnt = rules ? rules.length : 0;\n for (i = 0; i < ruleCnt; i++) {\n if (rulesetNode.rules[i] instanceof tree.Extend) {\n allSelectorsExtendList.push(rules[i]);\n rulesetNode.extendOnEveryPath = true;\n }\n }\n\n // now find every selector and apply the extends that apply to all extends\n // and the ones which apply to an individual extend\n const paths = rulesetNode.paths;\n for (i = 0; i < paths.length; i++) {\n const selectorPath = paths[i];\n const selector = selectorPath[selectorPath.length - 1];\n const selExtendList = selector.extendList;\n\n extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList)\n : allSelectorsExtendList;\n\n if (extendList) {\n extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone());\n }\n\n for (j = 0; j < extendList.length; j++) {\n this.foundExtends = true;\n extend = extendList[j];\n extend.findSelfSelectors(selectorPath);\n extend.ruleset = rulesetNode;\n if (j === 0) { extend.firstExtendOnThisSelectorPath = true; }\n this.allExtendsStack[this.allExtendsStack.length - 1].push(extend);\n }\n }\n\n this.contexts.push(rulesetNode.selectors);\n }\n\n visitRulesetOut(rulesetNode) {\n if (!rulesetNode.root) {\n this.contexts.length = this.contexts.length - 1;\n }\n }\n\n visitMedia(mediaNode, visitArgs) {\n mediaNode.allExtends = [];\n this.allExtendsStack.push(mediaNode.allExtends);\n }\n\n visitMediaOut(mediaNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n atRuleNode.allExtends = [];\n this.allExtendsStack.push(atRuleNode.allExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n}\n\nclass ProcessExtendsVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n const extendFinder = new ExtendFinderVisitor();\n this.extendIndices = {};\n extendFinder.run(root);\n if (!extendFinder.foundExtends) { return root; }\n root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends));\n this.allExtendsStack = [root.allExtends];\n const newRoot = this._visitor.visit(root);\n this.checkExtendsForNonMatched(root.allExtends);\n return newRoot;\n }\n\n checkExtendsForNonMatched(extendList) {\n const indices = this.extendIndices;\n extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => {\n let selector = '_unknown_';\n try {\n selector = extend.selector.toCSS({});\n }\n catch (_) {}\n\n if (!indices[`${extend.index} ${selector}`]) {\n indices[`${extend.index} ${selector}`] = true;\n logger.warn(`extend '${selector}' has no matches`);\n }\n });\n }\n\n doExtendChaining(extendsList, extendsListTarget, iterationCount) {\n //\n // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering\n // and pasting the selector we would do normally, but we are also adding an extend with the same target selector\n // this means this new extend can then go and alter other extends\n //\n // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors\n // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already\n // processed if we look at each selector at a time, as is done in visitRuleset\n\n let extendIndex;\n\n let targetExtendIndex;\n let matches;\n const extendsToAdd = [];\n let newSelector;\n const extendVisitor = this;\n let selectorPath;\n let extend;\n let targetExtend;\n let newExtend;\n\n iterationCount = iterationCount || 0;\n\n // loop through comparing every extend with every target extend.\n // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place\n // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one\n // and the second is the target.\n // the separation into two lists allows us to process a subset of chains with a bigger set, as is the\n // case when processing media queries\n for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) {\n for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) {\n\n extend = extendsList[extendIndex];\n targetExtend = extendsListTarget[targetExtendIndex];\n\n // look for circular references\n if ( extend.parent_ids.indexOf( targetExtend.object_id ) >= 0 ) { continue; }\n\n // find a match in the target extends self selector (the bit before :extend)\n selectorPath = [targetExtend.selfSelectors[0]];\n matches = extendVisitor.findMatch(extend, selectorPath);\n\n if (matches.length) {\n extend.hasFoundMatches = true;\n\n // we found a match, so for each self selector..\n extend.selfSelectors.forEach(selfSelector => {\n const info = targetExtend.visibilityInfo();\n\n // process the extend as usual\n newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible());\n\n // but now we create a new extend from it\n newExtend = new(tree.Extend)(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info);\n newExtend.selfSelectors = newSelector;\n\n // add the extend onto the list of extends for that selector\n newSelector[newSelector.length - 1].extendList = [newExtend];\n\n // record that we need to add it.\n extendsToAdd.push(newExtend);\n newExtend.ruleset = targetExtend.ruleset;\n\n // remember its parents for circular references\n newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids);\n\n // only process the selector once.. if we have :extend(.a,.b) then multiple\n // extends will look at the same selector path, so when extending\n // we know that any others will be duplicates in terms of what is added to the css\n if (targetExtend.firstExtendOnThisSelectorPath) {\n newExtend.firstExtendOnThisSelectorPath = true;\n targetExtend.ruleset.paths.push(newSelector);\n }\n });\n }\n }\n }\n\n if (extendsToAdd.length) {\n // try to detect circular references to stop a stack overflow.\n // may no longer be needed.\n this.extendChainCount++;\n if (iterationCount > 100) {\n let selectorOne = '{unable to calculate}';\n let selectorTwo = '{unable to calculate}';\n try {\n selectorOne = extendsToAdd[0].selfSelectors[0].toCSS();\n selectorTwo = extendsToAdd[0].selector.toCSS();\n }\n catch (e) {}\n throw { message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})`};\n }\n\n // now process the new extends on the existing rules so that we can handle a extending b extending c extending\n // d extending e...\n return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1));\n } else {\n return extendsToAdd;\n }\n }\n\n visitDeclaration(ruleNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitSelector(selectorNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n let matches;\n let pathIndex;\n let extendIndex;\n const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1];\n const selectorsToAdd = [];\n const extendVisitor = this;\n let selectorPath;\n\n // look at each selector path in the ruleset, find any extend matches and then copy, find and replace\n\n for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) {\n for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) {\n selectorPath = rulesetNode.paths[pathIndex];\n\n // extending extends happens initially, before the main pass\n if (rulesetNode.extendOnEveryPath) { continue; }\n const extendList = selectorPath[selectorPath.length - 1].extendList;\n if (extendList && extendList.length) { continue; }\n\n matches = this.findMatch(allExtends[extendIndex], selectorPath);\n\n if (matches.length) {\n allExtends[extendIndex].hasFoundMatches = true;\n\n allExtends[extendIndex].selfSelectors.forEach(selfSelector => {\n let extendedSelectors;\n extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible());\n selectorsToAdd.push(extendedSelectors);\n });\n }\n }\n }\n rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd);\n }\n\n findMatch(extend, haystackSelectorPath) {\n //\n // look through the haystack selector path to try and find the needle - extend.selector\n // returns an array of selector matches that can then be replaced\n //\n let haystackSelectorIndex;\n\n let hackstackSelector;\n let hackstackElementIndex;\n let haystackElement;\n let targetCombinator;\n let i;\n const extendVisitor = this;\n const needleElements = extend.selector.elements;\n const potentialMatches = [];\n let potentialMatch;\n const matches = [];\n\n // loop through the haystack elements\n for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) {\n hackstackSelector = haystackSelectorPath[haystackSelectorIndex];\n\n for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) {\n\n haystackElement = hackstackSelector.elements[hackstackElementIndex];\n\n // if we allow elements before our match we can add a potential match every time. otherwise only at the first element.\n if (extend.allowBefore || (haystackSelectorIndex === 0 && hackstackElementIndex === 0)) {\n potentialMatches.push({pathIndex: haystackSelectorIndex, index: hackstackElementIndex, matched: 0,\n initialCombinator: haystackElement.combinator});\n }\n\n for (i = 0; i < potentialMatches.length; i++) {\n potentialMatch = potentialMatches[i];\n\n // selectors add \" \" onto the first element. When we use & it joins the selectors together, but if we don't\n // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to\n // work out what the resulting combinator will be\n targetCombinator = haystackElement.combinator.value;\n if (targetCombinator === '' && hackstackElementIndex === 0) {\n targetCombinator = ' ';\n }\n\n // if we don't match, null our match to indicate failure\n if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) ||\n (potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator)) {\n potentialMatch = null;\n } else {\n potentialMatch.matched++;\n }\n\n // if we are still valid and have finished, test whether we have elements after and whether these are allowed\n if (potentialMatch) {\n potentialMatch.finished = potentialMatch.matched === needleElements.length;\n if (potentialMatch.finished &&\n (!extend.allowAfter &&\n (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length))) {\n potentialMatch = null;\n }\n }\n // if null we remove, if not, we are still valid, so either push as a valid match or continue\n if (potentialMatch) {\n if (potentialMatch.finished) {\n potentialMatch.length = needleElements.length;\n potentialMatch.endPathIndex = haystackSelectorIndex;\n potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match\n potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again\n matches.push(potentialMatch);\n }\n } else {\n potentialMatches.splice(i, 1);\n i--;\n }\n }\n }\n }\n return matches;\n }\n\n isElementValuesEqual(elementValue1, elementValue2) {\n if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') {\n return elementValue1 === elementValue2;\n }\n if (elementValue1 instanceof tree.Attribute) {\n if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) {\n return false;\n }\n if (!elementValue1.value || !elementValue2.value) {\n if (elementValue1.value || elementValue2.value) {\n return false;\n }\n return true;\n }\n elementValue1 = elementValue1.value.value || elementValue1.value;\n elementValue2 = elementValue2.value.value || elementValue2.value;\n return elementValue1 === elementValue2;\n }\n elementValue1 = elementValue1.value;\n elementValue2 = elementValue2.value;\n if (elementValue1 instanceof tree.Selector) {\n if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) {\n return false;\n }\n for (let i = 0; i < elementValue1.elements.length; i++) {\n if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) {\n if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) {\n return false;\n }\n }\n if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) {\n return false;\n }\n }\n return true;\n }\n return false;\n }\n\n extendSelector(matches, selectorPath, replacementSelector, isVisible) {\n // for a set of matches, replace each match with the replacement selector\n\n let currentSelectorPathIndex = 0;\n\n let currentSelectorPathElementIndex = 0;\n let path = [];\n let matchIndex;\n let selector;\n let firstElement;\n let match;\n let newElements;\n\n for (matchIndex = 0; matchIndex < matches.length; matchIndex++) {\n match = matches[matchIndex];\n selector = selectorPath[match.pathIndex];\n firstElement = new tree.Element(\n match.initialCombinator,\n replacementSelector.elements[0].value,\n replacementSelector.elements[0].isVariable,\n replacementSelector.elements[0].getIndex(),\n replacementSelector.elements[0].fileInfo()\n );\n\n if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n\n newElements = selector.elements\n .slice(currentSelectorPathElementIndex, match.index)\n .concat([firstElement])\n .concat(replacementSelector.elements.slice(1));\n\n if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) {\n path[path.length - 1].elements =\n path[path.length - 1].elements.concat(newElements);\n } else {\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex));\n\n path.push(new tree.Selector(\n newElements\n ));\n }\n currentSelectorPathIndex = match.endPathIndex;\n currentSelectorPathElementIndex = match.endPathElementIndex;\n if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) {\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n }\n\n if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathIndex++;\n }\n\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length));\n path = path.map(currentValue => {\n // we can re-use elements here, because the visibility property matters only for selectors\n const derived = currentValue.createDerived(currentValue.elements);\n if (isVisible) {\n derived.ensureVisibility();\n } else {\n derived.ensureInvisibility();\n }\n return derived;\n });\n return path;\n }\n\n visitMedia(mediaNode, visitArgs) {\n let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitMediaOut(mediaNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n}\n\nexport default ProcessExtendsVisitor;\n","import Visitor from './visitor';\n\nclass JoinSelectorVisitor {\n constructor() {\n this.contexts = [[]];\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n return this._visitor.visit(root);\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n const paths = [];\n let selectors;\n\n this.contexts.push(paths);\n\n if (!rulesetNode.root) {\n selectors = rulesetNode.selectors;\n if (selectors) {\n selectors = selectors.filter(selector => selector.getIsOutput());\n rulesetNode.selectors = selectors.length ? selectors : (selectors = null);\n if (selectors) { rulesetNode.joinSelectors(paths, context, selectors); }\n }\n if (!selectors) { rulesetNode.rules = null; }\n rulesetNode.paths = paths;\n }\n }\n\n visitRulesetOut(rulesetNode) {\n this.contexts.length = this.contexts.length - 1;\n }\n\n visitMedia(mediaNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia);\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n if (atRuleNode.rules && atRuleNode.rules.length) {\n atRuleNode.rules[0].root = (atRuleNode.isRooted || context.length === 0 || null);\n }\n }\n}\n\nexport default JoinSelectorVisitor;\n","import tree from '../tree';\nimport Visitor from './visitor';\n\nclass CSSVisitorUtils {\n constructor(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n }\n\n containsSilentNonBlockedChild(bodyRules) {\n let rule;\n if (!bodyRules) {\n return false;\n }\n for (let r = 0; r < bodyRules.length; r++) {\n rule = bodyRules[r];\n if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) {\n // the atrule contains something that was referenced (likely by extend)\n // therefore it needs to be shown in output too\n return true;\n }\n }\n return false;\n }\n\n keepOnlyVisibleChilds(owner) {\n if (owner && owner.rules) {\n owner.rules = owner.rules.filter(thing => thing.isVisible());\n }\n }\n\n isEmpty(owner) {\n return (owner && owner.rules) \n ? (owner.rules.length === 0) : true;\n }\n\n hasVisibleSelector(rulesetNode) {\n return (rulesetNode && rulesetNode.paths)\n ? (rulesetNode.paths.length > 0) : false;\n }\n\n resolveVisibility(node, originalRules) {\n if (!node.blocksVisibility()) {\n if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) {\n return ;\n }\n\n return node;\n }\n\n const compiledRulesBody = node.rules[0];\n this.keepOnlyVisibleChilds(compiledRulesBody);\n\n if (this.isEmpty(compiledRulesBody)) {\n return ;\n }\n\n node.ensureVisibility();\n node.removeVisibilityBlock();\n\n return node;\n }\n\n isVisibleRuleset(rulesetNode) {\n if (rulesetNode.firstRoot) {\n return true;\n }\n\n if (this.isEmpty(rulesetNode)) {\n return false;\n }\n\n if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) {\n return false;\n }\n\n return true;\n }\n}\n\nconst ToCSSVisitor = function(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n this.utils = new CSSVisitorUtils(context);\n};\n\nToCSSVisitor.prototype = {\n isReplacing: true,\n run: function (root) {\n return this._visitor.visit(root);\n },\n\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.blocksVisibility() || declNode.variable) {\n return;\n }\n return declNode;\n },\n\n visitMixinDefinition: function (mixinNode, visitArgs) {\n // mixin definitions do not get eval'd - this means they keep state\n // so we have to clear that state here so it isn't used if toCSS is called twice\n mixinNode.frames = [];\n },\n\n visitExtend: function (extendNode, visitArgs) {\n },\n\n visitComment: function (commentNode, visitArgs) {\n if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) {\n return;\n }\n return commentNode;\n },\n\n visitMedia: function(mediaNode, visitArgs) {\n const originalRules = mediaNode.rules[0].rules;\n mediaNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n return this.utils.resolveVisibility(mediaNode, originalRules);\n },\n\n visitImport: function (importNode, visitArgs) {\n if (importNode.blocksVisibility()) {\n return ;\n }\n return importNode;\n },\n\n visitAtRule: function(atRuleNode, visitArgs) {\n if (atRuleNode.rules && atRuleNode.rules.length) {\n return this.visitAtRuleWithBody(atRuleNode, visitArgs);\n } else {\n return this.visitAtRuleWithoutBody(atRuleNode, visitArgs);\n }\n },\n\n visitAnonymous: function(anonymousNode, visitArgs) {\n if (!anonymousNode.blocksVisibility()) {\n anonymousNode.accept(this._visitor);\n return anonymousNode;\n }\n },\n\n visitAtRuleWithBody: function(atRuleNode, visitArgs) {\n // if there is only one nested ruleset and that one has no path, then it is\n // just fake ruleset\n function hasFakeRuleset(atRuleNode) {\n const bodyRules = atRuleNode.rules;\n return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0);\n }\n function getBodyRules(atRuleNode) {\n const nodeRules = atRuleNode.rules;\n if (hasFakeRuleset(atRuleNode)) {\n return nodeRules[0].rules;\n }\n\n return nodeRules;\n }\n // it is still true that it is only one ruleset in array\n // this is last such moment\n // process childs\n const originalRules = getBodyRules(atRuleNode);\n atRuleNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n if (!this.utils.isEmpty(atRuleNode)) {\n this._mergeRules(atRuleNode.rules[0].rules);\n }\n\n return this.utils.resolveVisibility(atRuleNode, originalRules);\n },\n\n visitAtRuleWithoutBody: function(atRuleNode, visitArgs) {\n if (atRuleNode.blocksVisibility()) {\n return;\n }\n\n if (atRuleNode.name === '@charset') {\n // Only output the debug info together with subsequent @charset definitions\n // a comment (or @media statement) before the actual @charset atrule would\n // be considered illegal css as it has to be on the first line\n if (this.charset) {\n if (atRuleNode.debugInfo) {\n const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\\n/g, '')} */\\n`);\n comment.debugInfo = atRuleNode.debugInfo;\n return this._visitor.visit(comment);\n }\n return;\n }\n this.charset = true;\n }\n\n return atRuleNode;\n },\n\n checkValidNodes: function(rules, isRoot) {\n if (!rules) {\n return;\n }\n\n for (let i = 0; i < rules.length; i++) {\n const ruleNode = rules[i];\n if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) {\n throw { message: 'Properties must be inside selector blocks. They cannot be in the root',\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode instanceof tree.Call) {\n throw { message: `Function '${ruleNode.name}' is undefined`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode.type && !ruleNode.allowRoot) {\n throw { message: `${ruleNode.type} node returned by a function is not valid here`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n }\n },\n\n visitRuleset: function (rulesetNode, visitArgs) {\n // at this point rulesets are nested into each other\n let rule;\n\n const rulesets = [];\n\n this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot);\n\n if (!rulesetNode.root) {\n // remove invisible paths\n this._compileRulesetPaths(rulesetNode);\n\n // remove rulesets from this ruleset body and compile them separately\n const nodeRules = rulesetNode.rules;\n\n let nodeRuleCnt = nodeRules ? nodeRules.length : 0;\n for (let i = 0; i < nodeRuleCnt; ) {\n rule = nodeRules[i];\n if (rule && rule.rules) {\n // visit because we are moving them out from being a child\n rulesets.push(this._visitor.visit(rule));\n nodeRules.splice(i, 1);\n nodeRuleCnt--;\n continue;\n }\n i++;\n }\n // accept the visitor to remove rules and refactor itself\n // then we can decide nogw whether we want it or not\n // compile body\n if (nodeRuleCnt > 0) {\n rulesetNode.accept(this._visitor);\n } else {\n rulesetNode.rules = null;\n }\n visitArgs.visitDeeper = false;\n } else { // if (! rulesetNode.root) {\n rulesetNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n }\n\n if (rulesetNode.rules) {\n this._mergeRules(rulesetNode.rules);\n this._removeDuplicateRules(rulesetNode.rules);\n }\n\n // now decide whether we keep the ruleset\n if (this.utils.isVisibleRuleset(rulesetNode)) {\n rulesetNode.ensureVisibility();\n rulesets.splice(0, 0, rulesetNode);\n }\n\n if (rulesets.length === 1) {\n return rulesets[0];\n }\n return rulesets;\n },\n\n _compileRulesetPaths: function(rulesetNode) {\n if (rulesetNode.paths) {\n rulesetNode.paths = rulesetNode.paths\n .filter(p => {\n let i;\n if (p[0].elements[0].combinator.value === ' ') {\n p[0].elements[0].combinator = new(tree.Combinator)('');\n }\n for (i = 0; i < p.length; i++) {\n if (p[i].isVisible() && p[i].getIsOutput()) {\n return true;\n }\n }\n return false;\n });\n }\n },\n\n _removeDuplicateRules: function(rules) {\n if (!rules) { return; }\n\n // remove duplicates\n const ruleCache = {};\n\n let ruleList;\n let rule;\n let i;\n\n for (i = rules.length - 1; i >= 0 ; i--) {\n rule = rules[i];\n if (rule instanceof tree.Declaration) {\n if (!ruleCache[rule.name]) {\n ruleCache[rule.name] = rule;\n } else {\n ruleList = ruleCache[rule.name];\n if (ruleList instanceof tree.Declaration) {\n ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)];\n }\n const ruleCSS = rule.toCSS(this._context);\n if (ruleList.indexOf(ruleCSS) !== -1) {\n rules.splice(i, 1);\n } else {\n ruleList.push(ruleCSS);\n }\n }\n }\n }\n },\n\n _mergeRules: function(rules) {\n if (!rules) {\n return; \n }\n\n const groups = {};\n const groupsArr = [];\n\n for (let i = 0; i < rules.length; i++) {\n const rule = rules[i];\n if (rule.merge) {\n const key = rule.name;\n groups[key] ? rules.splice(i--, 1) : \n groupsArr.push(groups[key] = []);\n groups[key].push(rule);\n }\n }\n\n groupsArr.forEach(group => {\n if (group.length > 0) {\n const result = group[0];\n let space = [];\n const comma = [new tree.Expression(space)];\n group.forEach(rule => {\n if ((rule.merge === '+') && (space.length > 0)) {\n comma.push(new tree.Expression(space = []));\n }\n space.push(rule.value);\n result.important = result.important || rule.important;\n });\n result.value = new tree.Value(comma);\n }\n });\n }\n};\n\nexport default ToCSSVisitor;\n","import Visitor from './visitor';\nimport ImportVisitor from './import-visitor';\nimport MarkVisibleSelectorsVisitor from './set-tree-visibility-visitor';\nimport ExtendVisitor from './extend-visitor';\nimport JoinSelectorVisitor from './join-selector-visitor';\nimport ToCSSVisitor from './to-css-visitor';\n\nexport default {\n Visitor,\n ImportVisitor,\n MarkVisibleSelectorsVisitor,\n ExtendVisitor,\n JoinSelectorVisitor,\n ToCSSVisitor\n};\n","import chunker from './chunker';\n\nexport default () => {\n let // Less input string\n input;\n\n let // current chunk\n j;\n\n const // holds state for backtracking\n saveStack = [];\n\n let // furthest index the parser has gone to\n furthest;\n\n let // if this is furthest we got to, this is the probably cause\n furthestPossibleErrorMessage;\n\n let // chunkified input\n chunks;\n\n let // current chunk\n current;\n\n let // index of current chunk, in `input`\n currentPos;\n\n const parserInput = {};\n const CHARCODE_SPACE = 32;\n const CHARCODE_TAB = 9;\n const CHARCODE_LF = 10;\n const CHARCODE_CR = 13;\n const CHARCODE_PLUS = 43;\n const CHARCODE_COMMA = 44;\n const CHARCODE_FORWARD_SLASH = 47;\n const CHARCODE_9 = 57;\n\n function skipWhitespace(length) {\n const oldi = parserInput.i;\n const oldj = j;\n const curr = parserInput.i - currentPos;\n const endIndex = parserInput.i + current.length - curr;\n const mem = (parserInput.i += length);\n const inp = input;\n let c;\n let nextChar;\n let comment;\n\n for (; parserInput.i < endIndex; parserInput.i++) {\n c = inp.charCodeAt(parserInput.i);\n\n if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) {\n nextChar = inp.charAt(parserInput.i + 1);\n if (nextChar === '/') {\n comment = {index: parserInput.i, isLineComment: true};\n let nextNewLine = inp.indexOf('\\n', parserInput.i + 2);\n if (nextNewLine < 0) {\n nextNewLine = endIndex;\n }\n parserInput.i = nextNewLine;\n comment.text = inp.substr(comment.index, parserInput.i - comment.index);\n parserInput.commentStore.push(comment);\n continue;\n } else if (nextChar === '*') {\n const nextStarSlash = inp.indexOf('*/', parserInput.i + 2);\n if (nextStarSlash >= 0) {\n comment = {\n index: parserInput.i,\n text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i),\n isLineComment: false\n };\n parserInput.i += comment.text.length - 1;\n parserInput.commentStore.push(comment);\n continue;\n }\n }\n break;\n }\n\n if ((c !== CHARCODE_SPACE) && (c !== CHARCODE_LF) && (c !== CHARCODE_TAB) && (c !== CHARCODE_CR)) {\n break;\n }\n }\n\n current = current.slice(length + parserInput.i - mem + curr);\n currentPos = parserInput.i;\n\n if (!current.length) {\n if (j < chunks.length - 1) {\n current = chunks[++j];\n skipWhitespace(0); // skip space at the beginning of a chunk\n return true; // things changed\n }\n parserInput.finished = true;\n }\n\n return oldi !== parserInput.i || oldj !== j;\n }\n\n parserInput.save = () => {\n currentPos = parserInput.i;\n saveStack.push( { current, i: parserInput.i, j });\n };\n parserInput.restore = possibleErrorMessage => {\n\n if (parserInput.i > furthest || (parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage)) {\n furthest = parserInput.i;\n furthestPossibleErrorMessage = possibleErrorMessage;\n }\n const state = saveStack.pop();\n current = state.current;\n currentPos = parserInput.i = state.i;\n j = state.j;\n };\n parserInput.forget = () => {\n saveStack.pop();\n };\n parserInput.isWhitespace = offset => {\n const pos = parserInput.i + (offset || 0);\n const code = input.charCodeAt(pos);\n return (code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF);\n };\n\n // Specialization of $(tok)\n parserInput.$re = tok => {\n if (parserInput.i > currentPos) {\n current = current.slice(parserInput.i - currentPos);\n currentPos = parserInput.i;\n }\n\n const m = tok.exec(current);\n if (!m) {\n return null;\n }\n\n skipWhitespace(m[0].length);\n if (typeof m === 'string') {\n return m;\n }\n\n return m.length === 1 ? m[0] : m;\n };\n\n parserInput.$char = tok => {\n if (input.charAt(parserInput.i) !== tok) {\n return null;\n }\n skipWhitespace(1);\n return tok;\n };\n\n parserInput.$str = tok => {\n const tokLength = tok.length;\n\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tokLength; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return null;\n }\n }\n\n skipWhitespace(tokLength);\n return tok;\n };\n\n parserInput.$quoted = loc => {\n const pos = loc || parserInput.i;\n const startChar = input.charAt(pos);\n\n if (startChar !== '\\'' && startChar !== '\"') {\n return;\n }\n const length = input.length;\n const currentPosition = pos;\n\n for (let i = 1; i + currentPosition < length; i++) {\n const nextChar = input.charAt(i + currentPosition);\n switch (nextChar) {\n case '\\\\':\n i++;\n continue;\n case '\\r':\n case '\\n':\n break;\n case startChar:\n const str = input.substr(currentPosition, i + 1);\n if (!loc && loc !== 0) {\n skipWhitespace(i + 1);\n return str\n }\n return [startChar, str];\n default:\n }\n }\n return null;\n };\n\n /**\n * Permissive parsing. Ignores everything except matching {} [] () and quotes\n * until matching token (outside of blocks)\n */\n parserInput.$parseUntil = tok => {\n let quote = '';\n let returnVal = null;\n let inComment = false;\n let blockDepth = 0;\n const blockStack = [];\n const parseGroups = [];\n const length = input.length;\n const startPos = parserInput.i;\n let lastPos = parserInput.i;\n let i = parserInput.i;\n let loop = true;\n let testChar;\n\n if (typeof tok === 'string') {\n testChar = char => char === tok\n } else {\n testChar = char => tok.test(char)\n }\n\n do {\n let prevChar;\n let nextChar = input.charAt(i);\n if (blockDepth === 0 && testChar(nextChar)) {\n returnVal = input.substr(lastPos, i - lastPos);\n if (returnVal) {\n parseGroups.push(returnVal);\n }\n else {\n parseGroups.push(' ');\n }\n returnVal = parseGroups;\n skipWhitespace(i - startPos);\n loop = false\n } else {\n if (inComment) {\n if (nextChar === '*' && \n input.charAt(i + 1) === '/') {\n i++;\n blockDepth--;\n inComment = false;\n }\n i++;\n continue;\n }\n switch (nextChar) {\n case '\\\\':\n i++;\n nextChar = input.charAt(i);\n parseGroups.push(input.substr(lastPos, i - lastPos + 1));\n lastPos = i + 1;\n break;\n case '/':\n if (input.charAt(i + 1) === '*') {\n i++;\n inComment = true;\n blockDepth++;\n }\n break;\n case '\\'':\n case '\"':\n quote = parserInput.$quoted(i);\n if (quote) {\n parseGroups.push(input.substr(lastPos, i - lastPos), quote);\n i += quote[1].length - 1;\n lastPos = i + 1;\n }\n else {\n skipWhitespace(i - startPos);\n returnVal = nextChar;\n loop = false;\n }\n break;\n case '{':\n blockStack.push('}');\n blockDepth++;\n break;\n case '(':\n blockStack.push(')');\n blockDepth++;\n break;\n case '[':\n blockStack.push(']');\n blockDepth++;\n break;\n case '}':\n case ')':\n case ']':\n const expected = blockStack.pop();\n if (nextChar === expected) {\n blockDepth--;\n } else {\n // move the parser to the error and return expected\n skipWhitespace(i - startPos);\n returnVal = expected;\n loop = false;\n }\n }\n i++;\n if (i > length) {\n loop = false;\n }\n }\n prevChar = nextChar;\n } while (loop);\n\n return returnVal ? returnVal : null;\n }\n\n parserInput.autoCommentAbsorb = true;\n parserInput.commentStore = [];\n parserInput.finished = false;\n\n // Same as $(), but don't change the state of the parser,\n // just return the match.\n parserInput.peek = tok => {\n if (typeof tok === 'string') {\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tok.length; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return false;\n }\n }\n return true;\n } else {\n return tok.test(current);\n }\n };\n\n // Specialization of peek()\n // TODO remove or change some currentChar calls to peekChar\n parserInput.peekChar = tok => input.charAt(parserInput.i) === tok;\n\n parserInput.currentChar = () => input.charAt(parserInput.i);\n\n parserInput.prevChar = () => input.charAt(parserInput.i - 1);\n\n parserInput.getInput = () => input;\n\n parserInput.peekNotNumeric = () => {\n const c = input.charCodeAt(parserInput.i);\n // Is the first char of the dimension 0-9, '.', '+' or '-'\n return (c > CHARCODE_9 || c < CHARCODE_PLUS) || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA;\n };\n\n parserInput.start = (str, chunkInput, failFunction) => {\n input = str;\n parserInput.i = j = currentPos = furthest = 0;\n\n // chunking apparently makes things quicker (but my tests indicate\n // it might actually make things slower in node at least)\n // and it is a non-perfect parse - it can't recognise\n // unquoted urls, meaning it can't distinguish comments\n // meaning comments with quotes or {}() in them get 'counted'\n // and then lead to parse errors.\n // In addition if the chunking chunks in the wrong place we might\n // not be able to parse a parser statement in one go\n // this is officially deprecated but can be switched on via an option\n // in the case it causes too much performance issues.\n if (chunkInput) {\n chunks = chunker(str, failFunction);\n } else {\n chunks = [str];\n }\n\n current = chunks[0];\n\n skipWhitespace(0);\n };\n\n parserInput.end = () => {\n let message;\n const isFinished = parserInput.i >= input.length;\n\n if (parserInput.i < furthest) {\n message = furthestPossibleErrorMessage;\n parserInput.i = furthest;\n }\n return {\n isFinished,\n furthest: parserInput.i,\n furthestPossibleErrorMessage: message,\n furthestReachedEnd: parserInput.i >= input.length - 1,\n furthestChar: input[parserInput.i]\n };\n };\n\n return parserInput;\n};\n","// Split the input into chunks.\nexport default (input, fail) => {\n const len = input.length;\n let level = 0;\n let parenLevel = 0;\n let lastOpening;\n let lastOpeningParen;\n let lastMultiComment;\n let lastMultiCommentEndBrace;\n const chunks = [];\n let emitFrom = 0;\n let chunkerCurrentIndex;\n let currentChunkStartIndex;\n let cc;\n let cc2;\n let matched;\n\n function emitChunk(force) {\n const len = chunkerCurrentIndex - emitFrom;\n if (((len < 512) && !force) || !len) {\n return;\n }\n chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1));\n emitFrom = chunkerCurrentIndex + 1;\n }\n\n for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc = input.charCodeAt(chunkerCurrentIndex);\n if (((cc >= 97) && (cc <= 122)) || (cc < 34)) {\n // a-z or whitespace\n continue;\n }\n\n switch (cc) {\n case 40: // (\n parenLevel++;\n lastOpeningParen = chunkerCurrentIndex;\n continue;\n case 41: // )\n if (--parenLevel < 0) {\n return fail('missing opening `(`', chunkerCurrentIndex);\n }\n continue;\n case 59: // ;\n if (!parenLevel) { emitChunk(); }\n continue;\n case 123: // {\n level++;\n lastOpening = chunkerCurrentIndex;\n continue;\n case 125: // }\n if (--level < 0) {\n return fail('missing opening `{`', chunkerCurrentIndex);\n }\n if (!level && !parenLevel) { emitChunk(); }\n continue;\n case 92: // \\\n if (chunkerCurrentIndex < len - 1) { chunkerCurrentIndex++; continue; }\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n case 34:\n case 39:\n case 96: // \", ' and `\n matched = 0;\n currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 > 96) { continue; }\n if (cc2 == cc) { matched = 1; break; }\n if (cc2 == 92) { // \\\n if (chunkerCurrentIndex == len - 1) {\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n }\n chunkerCurrentIndex++;\n }\n }\n if (matched) { continue; }\n return fail(`unmatched \\`${String.fromCharCode(cc)}\\``, currentChunkStartIndex);\n case 47: // /, check for comment\n if (parenLevel || (chunkerCurrentIndex == len - 1)) { continue; }\n cc2 = input.charCodeAt(chunkerCurrentIndex + 1);\n if (cc2 == 47) {\n // //, find lnfeed\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if ((cc2 <= 13) && ((cc2 == 10) || (cc2 == 13))) { break; }\n }\n } else if (cc2 == 42) {\n // /*, find */\n lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 == 125) { lastMultiCommentEndBrace = chunkerCurrentIndex; }\n if (cc2 != 42) { continue; }\n if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { break; }\n }\n if (chunkerCurrentIndex == len - 1) {\n return fail('missing closing `*/`', currentChunkStartIndex);\n }\n chunkerCurrentIndex++;\n }\n continue;\n case 42: // *, check for unmatched */\n if ((chunkerCurrentIndex < len - 1) && (input.charCodeAt(chunkerCurrentIndex + 1) == 47)) {\n return fail('unmatched `/*`', chunkerCurrentIndex);\n }\n continue;\n }\n }\n\n if (level !== 0) {\n if ((lastMultiComment > lastOpening) && (lastMultiCommentEndBrace > lastMultiComment)) {\n return fail('missing closing `}` or `*/`', lastOpening);\n } else {\n return fail('missing closing `}`', lastOpening);\n }\n } else if (parenLevel !== 0) {\n return fail('missing closing `)`', lastOpeningParen);\n }\n\n emitChunk(true);\n return chunks;\n};\n","import LessError from '../less-error';\nimport tree from '../tree';\nimport visitors from '../visitors';\nimport getParserInput from './parser-input';\nimport * as utils from '../utils';\nimport functionRegistry from '../functions/function-registry';\n\n//\n// less.js - parser\n//\n// A relatively straight-forward predictive parser.\n// There is no tokenization/lexing stage, the input is parsed\n// in one sweep.\n//\n// To make the parser fast enough to run in the browser, several\n// optimization had to be made:\n//\n// - Matching and slicing on a huge input is often cause of slowdowns.\n// The solution is to chunkify the input into smaller strings.\n// The chunks are stored in the `chunks` var,\n// `j` holds the current chunk index, and `currentPos` holds\n// the index of the current chunk in relation to `input`.\n// This gives us an almost 4x speed-up.\n//\n// - In many cases, we don't need to match individual tokens;\n// for example, if a value doesn't hold any variables, operations\n// or dynamic references, the parser can effectively 'skip' it,\n// treating it as a literal.\n// An example would be '1px solid #000' - which evaluates to itself,\n// we don't need to know what the individual components are.\n// The drawback, of course is that you don't get the benefits of\n// syntax-checking on the CSS. This gives us a 50% speed-up in the parser,\n// and a smaller speed-up in the code-gen.\n//\n//\n// Token matching is done with the `$` function, which either takes\n// a terminal string or regexp, or a non-terminal function to call.\n// It also takes care of moving all the indices forwards.\n//\n\nconst Parser = function Parser(context, imports, fileInfo) {\n let parsers;\n const parserInput = getParserInput();\n\n function error(msg, type) {\n throw new LessError(\n {\n index: parserInput.i,\n filename: fileInfo.filename,\n type: type || 'Syntax',\n message: msg\n },\n imports\n );\n }\n\n function expect(arg, msg) {\n // some older browsers return typeof 'function' for RegExp\n const result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg);\n if (result) {\n return result;\n }\n \n error(msg || (typeof arg === 'string'\n ? `expected '${arg}' got '${parserInput.currentChar()}'`\n : 'unexpected token'));\n }\n\n // Specialization of expect()\n function expectChar(arg, msg) {\n if (parserInput.$char(arg)) {\n return arg;\n }\n error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`);\n }\n\n function getDebugInfo(index) {\n const filename = fileInfo.filename;\n\n return {\n lineNumber: utils.getLocation(index, parserInput.getInput()).line + 1,\n fileName: filename\n };\n }\n\n /**\n * Used after initial parsing to create nodes on the fly\n * \n * @param {String} str - string to parse \n * @param {Array} parseList - array of parsers to run input through e.g. [\"value\", \"important\"]\n * @param {Number} currentIndex - start number to begin indexing\n * @param {Object} fileInfo - fileInfo to attach to created nodes\n */\n function parseNode(str, parseList, currentIndex, fileInfo, callback) {\n let result;\n const returnNodes = [];\n const parser = parserInput;\n\n try {\n parser.start(str, false, function fail(msg, index) {\n callback({\n message: msg,\n index: index + currentIndex\n });\n });\n for (let x = 0, p, i; (p = parseList[x]); x++) {\n i = parser.i;\n result = parsers[p]();\n if (result) {\n result._index = i + currentIndex;\n result._fileInfo = fileInfo;\n returnNodes.push(result);\n }\n else {\n returnNodes.push(null);\n }\n }\n\n const endInfo = parser.end();\n if (endInfo.isFinished) {\n callback(null, returnNodes);\n }\n else {\n callback(true, null);\n }\n } catch (e) {\n throw new LessError({\n index: e.index + currentIndex,\n message: e.message\n }, imports, fileInfo.filename);\n }\n }\n\n //\n // The Parser\n //\n return {\n parserInput,\n imports,\n fileInfo,\n parseNode,\n //\n // Parse an input string into an abstract syntax tree,\n // @param str A string containing 'less' markup\n // @param callback call `callback` when done.\n // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply\n //\n parse: function (str, callback, additionalData) {\n let root;\n let error = null;\n let globalVars;\n let modifyVars;\n let ignored;\n let preText = '';\n\n globalVars = (additionalData && additionalData.globalVars) ? `${Parser.serializeVars(additionalData.globalVars)}\\n` : '';\n modifyVars = (additionalData && additionalData.modifyVars) ? `\\n${Parser.serializeVars(additionalData.modifyVars)}` : '';\n\n if (context.pluginManager) {\n const preProcessors = context.pluginManager.getPreProcessors();\n for (let i = 0; i < preProcessors.length; i++) {\n str = preProcessors[i].process(str, { context, imports, fileInfo });\n }\n }\n\n if (globalVars || (additionalData && additionalData.banner)) {\n preText = ((additionalData && additionalData.banner) ? additionalData.banner : '') + globalVars;\n ignored = imports.contentsIgnoredChars;\n ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0;\n ignored[fileInfo.filename] += preText.length;\n }\n\n str = str.replace(/\\r\\n?/g, '\\n');\n // Remove potential UTF Byte Order Mark\n str = preText + str.replace(/^\\uFEFF/, '') + modifyVars;\n imports.contents[fileInfo.filename] = str;\n\n // Start with the primary rule.\n // The whole syntax tree is held under a Ruleset node,\n // with the `root` property set to true, so no `{}` are\n // output. The callback is called when the input is parsed.\n try {\n parserInput.start(str, context.chunkInput, function fail(msg, index) {\n throw new LessError({\n index,\n type: 'Parse',\n message: msg,\n filename: fileInfo.filename\n }, imports);\n });\n\n tree.Node.prototype.parse = this;\n root = new tree.Ruleset(null, this.parsers.primary());\n tree.Node.prototype.rootNode = root;\n root.root = true;\n root.firstRoot = true;\n root.functionRegistry = functionRegistry.inherit();\n \n } catch (e) {\n return callback(new LessError(e, imports, fileInfo.filename));\n }\n\n // If `i` is smaller than the `input.length - 1`,\n // it means the parser wasn't able to parse the whole\n // string, so we've got a parsing error.\n //\n // We try to extract a \\n delimited string,\n // showing the line where the parse error occurred.\n // We split it up into two parts (the part which parsed,\n // and the part which didn't), so we can color them differently.\n const endInfo = parserInput.end();\n if (!endInfo.isFinished) {\n\n let message = endInfo.furthestPossibleErrorMessage;\n\n if (!message) {\n message = 'Unrecognised input';\n if (endInfo.furthestChar === '}') {\n message += '. Possibly missing opening \\'{\\'';\n } else if (endInfo.furthestChar === ')') {\n message += '. Possibly missing opening \\'(\\'';\n } else if (endInfo.furthestReachedEnd) {\n message += '. Possibly missing something';\n }\n }\n\n error = new LessError({\n type: 'Parse',\n message,\n index: endInfo.furthest,\n filename: fileInfo.filename\n }, imports);\n }\n\n const finish = e => {\n e = error || e || imports.error;\n\n if (e) {\n if (!(e instanceof LessError)) {\n e = new LessError(e, imports, fileInfo.filename);\n }\n\n return callback(e);\n }\n else {\n return callback(null, root);\n }\n };\n\n if (context.processImports !== false) {\n new visitors.ImportVisitor(imports, finish)\n .run(root);\n } else {\n return finish();\n }\n },\n\n //\n // Here in, the parsing rules/functions\n //\n // The basic structure of the syntax tree generated is as follows:\n //\n // Ruleset -> Declaration -> Value -> Expression -> Entity\n //\n // Here's some Less code:\n //\n // .class {\n // color: #fff;\n // border: 1px solid #000;\n // width: @w + 4px;\n // > .child {...}\n // }\n //\n // And here's what the parse tree might look like:\n //\n // Ruleset (Selector '.class', [\n // Declaration (\"color\", Value ([Expression [Color #fff]]))\n // Declaration (\"border\", Value ([Expression [Dimension 1px][Keyword \"solid\"][Color #000]]))\n // Declaration (\"width\", Value ([Expression [Operation \" + \" [Variable \"@w\"][Dimension 4px]]]))\n // Ruleset (Selector [Element '>', '.child'], [...])\n // ])\n //\n // In general, most rules will try to parse a token with the `$re()` function, and if the return\n // value is truly, will return a new node, of the relevant type. Sometimes, we need to check\n // first, before parsing, that's when we use `peek()`.\n //\n parsers: parsers = {\n //\n // The `primary` rule is the *entry* and *exit* point of the parser.\n // The rules here can appear at any level of the parse tree.\n //\n // The recursive nature of the grammar is an interplay between the `block`\n // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,\n // as represented by this simplified grammar:\n //\n // primary → (ruleset | declaration)+\n // ruleset → selector+ block\n // block → '{' primary '}'\n //\n // Only at one point is the primary rule not called from the\n // block rule: at the root level.\n //\n primary: function () {\n const mixin = this.mixin;\n let root = [];\n let node;\n\n while (true) {\n while (true) {\n node = this.comment();\n if (!node) { break; }\n root.push(node);\n }\n // always process comments before deciding if finished\n if (parserInput.finished) {\n break;\n }\n if (parserInput.peek('}')) {\n break;\n }\n\n node = this.extendRule();\n if (node) {\n root = root.concat(node);\n continue;\n }\n\n node = mixin.definition() || this.declaration() || this.ruleset() ||\n mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule();\n if (node) {\n root.push(node);\n } else {\n let foundSemiColon = false;\n while (parserInput.$char(';')) {\n foundSemiColon = true;\n }\n if (!foundSemiColon) {\n break;\n }\n }\n }\n\n return root;\n },\n\n // comments are collected by the main parsing mechanism and then assigned to nodes\n // where the current structure allows it\n comment: function () {\n if (parserInput.commentStore.length) {\n const comment = parserInput.commentStore.shift();\n return new(tree.Comment)(comment.text, comment.isLineComment, comment.index, fileInfo);\n }\n },\n\n //\n // Entities are tokens which can be found inside an Expression\n //\n entities: {\n mixinLookup: function() {\n return parsers.mixin.call(true, true);\n },\n //\n // A string, which supports escaping \" and '\n //\n // \"milky way\" 'he\\'s the one!'\n //\n quoted: function (forceEscaped) {\n let str;\n const index = parserInput.i;\n let isEscaped = false;\n\n parserInput.save();\n if (parserInput.$char('~')) {\n isEscaped = true;\n } else if (forceEscaped) {\n parserInput.restore();\n return;\n }\n\n str = parserInput.$quoted();\n if (!str) {\n parserInput.restore();\n return;\n }\n parserInput.forget();\n\n return new(tree.Quoted)(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo);\n },\n\n //\n // A catch-all word, such as:\n //\n // black border-collapse\n //\n keyword: function () {\n const k = parserInput.$char('%') || parserInput.$re(/^\\[?(?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\\]?/);\n if (k) {\n return tree.Color.fromKeyword(k) || new(tree.Keyword)(k);\n }\n },\n\n //\n // A function call\n //\n // rgb(255, 0, 255)\n //\n // The arguments are parsed with the `entities.arguments` parser.\n //\n call: function () {\n let name;\n let args;\n let func;\n const index = parserInput.i;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (parserInput.peek(/^url\\(/i)) {\n return;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^([\\w-]+|%|progid:[\\w\\.]+)\\(/);\n if (!name) {\n parserInput.forget(); \n return;\n }\n\n name = name[1];\n func = this.customFuncCall(name);\n if (func) {\n args = func.parse();\n if (args && func.stop) {\n parserInput.forget();\n return args;\n }\n }\n\n args = this.arguments(args);\n\n if (!parserInput.$char(')')) {\n parserInput.restore('Could not parse call arguments or missing \\')\\'');\n return;\n }\n\n parserInput.forget();\n\n return new(tree.Call)(name, args, index, fileInfo);\n },\n \n //\n // Parsing rules for functions with non-standard args, e.g.:\n //\n // boolean(not(2 > 1))\n //\n // This is a quick prototype, to be modified/improved when\n // more custom-parsed funcs come (e.g. `selector(...)`)\n //\n\n customFuncCall: function (name) {\n /* Ideally the table is to be moved out of here for faster perf.,\n but it's quite tricky since it relies on all these `parsers`\n and `expect` available only here */\n return {\n alpha: f(parsers.ieAlpha, true),\n boolean: f(condition),\n 'if': f(condition)\n }[name.toLowerCase()];\n\n function f(parse, stop) {\n return {\n parse, // parsing function\n stop // when true - stop after parse() and return its result, \n // otherwise continue for plain args\n };\n }\n \n function condition() {\n return [expect(parsers.condition, 'expected condition')];\n }\n },\n\n arguments: function (prevArgs) {\n let argsComma = prevArgs || [];\n const argsSemiColon = [];\n let isSemiColonSeparated;\n let value;\n\n parserInput.save();\n\n while (true) {\n if (prevArgs) {\n prevArgs = false;\n } else {\n value = parsers.detachedRuleset() || this.assignment() || parsers.expression();\n if (!value) {\n break;\n }\n\n if (value.value && value.value.length == 1) {\n value = value.value[0];\n }\n\n argsComma.push(value);\n }\n\n if (parserInput.$char(',')) {\n continue;\n }\n\n if (parserInput.$char(';') || isSemiColonSeparated) {\n isSemiColonSeparated = true;\n value = (argsComma.length < 1) ? argsComma[0]\n : new tree.Value(argsComma);\n argsSemiColon.push(value);\n argsComma = [];\n }\n }\n\n parserInput.forget();\n return isSemiColonSeparated ? argsSemiColon : argsComma;\n },\n literal: function () {\n return this.dimension() ||\n this.color() ||\n this.quoted() ||\n this.unicodeDescriptor();\n },\n\n // Assignments are argument entities for calls.\n // They are present in ie filter properties as shown below.\n //\n // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )\n //\n\n assignment: function () {\n let key;\n let value;\n parserInput.save();\n key = parserInput.$re(/^\\w+(?=\\s?=)/i);\n if (!key) {\n parserInput.restore();\n return;\n }\n if (!parserInput.$char('=')) {\n parserInput.restore();\n return;\n }\n value = parsers.entity();\n if (value) {\n parserInput.forget();\n return new(tree.Assignment)(key, value);\n } else {\n parserInput.restore();\n }\n },\n\n //\n // Parse url() tokens\n //\n // We use a specific rule for urls, because they don't really behave like\n // standard function calls. The difference is that the argument doesn't have\n // to be enclosed within a string, so it can't be parsed as an Expression.\n //\n url: function () {\n let value;\n const index = parserInput.i;\n\n parserInput.autoCommentAbsorb = false;\n\n if (!parserInput.$str('url(')) {\n parserInput.autoCommentAbsorb = true;\n return;\n }\n\n value = this.quoted() || this.variable() || this.property() ||\n parserInput.$re(/^(?:(?:\\\\[\\(\\)'\"])|[^\\(\\)'\"])+/) || '';\n\n parserInput.autoCommentAbsorb = true;\n\n expectChar(')');\n\n return new(tree.URL)((value.value != null || \n value instanceof tree.Variable || \n value instanceof tree.Property) ?\n value : new(tree.Anonymous)(value, index), index, fileInfo);\n },\n\n //\n // A Variable entity, such as `@fink`, in\n //\n // width: @fink + 2px\n //\n // We use a different parser for variable definitions,\n // see `parsers.variable`.\n //\n variable: function () {\n let ch;\n let name;\n const index = parserInput.i;\n\n parserInput.save();\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\\w-]+/))) {\n ch = parserInput.currentChar();\n if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\\s/)) {\n // this may be a VariableCall lookup\n const result = parsers.variableCall(name);\n if (result) {\n parserInput.forget();\n return result;\n }\n }\n parserInput.forget();\n return new(tree.Variable)(name, index, fileInfo);\n }\n parserInput.restore();\n },\n\n // A variable entity using the protective {} e.g. @{var}\n variableCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\\{([\\w-]+)\\}/))) {\n return new(tree.Variable)(`@${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Property accessor, such as `$color`, in\n //\n // background-color: $color\n //\n property: function () {\n let name;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\\$[\\w-]+/))) {\n return new(tree.Property)(name, index, fileInfo);\n }\n },\n\n // A property entity useing the protective {} e.g. ${prop}\n propertyCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\\$\\{([\\w-]+)\\}/))) {\n return new(tree.Property)(`$${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Hexadecimal color\n //\n // #4F3C2F\n //\n // `rgb` and `hsl` colors are parsed through the `entities.call` parser.\n //\n color: function () {\n let rgb;\n parserInput.save();\n\n if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\\w.#\\[])?/))) {\n if (!rgb[2]) {\n parserInput.forget();\n return new(tree.Color)(rgb[1], undefined, rgb[0]);\n } \n }\n parserInput.restore();\n },\n\n colorKeyword: function () {\n parserInput.save();\n const autoCommentAbsorb = parserInput.autoCommentAbsorb;\n parserInput.autoCommentAbsorb = false;\n const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/);\n parserInput.autoCommentAbsorb = autoCommentAbsorb;\n if (!k) {\n parserInput.forget();\n return;\n }\n parserInput.restore();\n const color = tree.Color.fromKeyword(k);\n if (color) {\n parserInput.$str(k);\n return color;\n }\n },\n\n //\n // A Dimension, that is, a number and a unit\n //\n // 0.5em 95%\n //\n dimension: function () {\n if (parserInput.peekNotNumeric()) {\n return;\n }\n\n const value = parserInput.$re(/^([+-]?\\d*\\.?\\d+)(%|[a-z_]+)?/i);\n if (value) {\n return new(tree.Dimension)(value[1], value[2]);\n }\n },\n\n //\n // A unicode descriptor, as is used in unicode-range\n //\n // U+0?? or U+00A1-00A9\n //\n unicodeDescriptor: function () {\n let ud;\n\n ud = parserInput.$re(/^U\\+[0-9a-fA-F?]+(\\-[0-9a-fA-F?]+)?/);\n if (ud) {\n return new(tree.UnicodeDescriptor)(ud[0]);\n }\n },\n\n //\n // JavaScript code to be evaluated\n //\n // `window.location.href`\n //\n javascript: function () {\n let js;\n const index = parserInput.i;\n\n parserInput.save();\n\n const escape = parserInput.$char('~');\n const jsQuote = parserInput.$char('`');\n\n if (!jsQuote) {\n parserInput.restore();\n return;\n }\n\n js = parserInput.$re(/^[^`]*`/);\n if (js) {\n parserInput.forget();\n return new(tree.JavaScript)(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo);\n }\n parserInput.restore('invalid javascript definition');\n }\n },\n\n //\n // The variable part of a variable definition. Used in the `rule` parser\n //\n // @fink:\n //\n variable: function () {\n let name;\n\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\\w-]+)\\s*:/))) { return name[1]; }\n },\n\n //\n // Call a variable value to retrieve a detached ruleset\n // or a value from a detached ruleset's rules.\n //\n // @fink();\n // @fink;\n // color: @fink[@color];\n //\n variableCall: function (parsedName) {\n let lookups;\n let important;\n const i = parserInput.i;\n const inValue = !!parsedName;\n let name = parsedName;\n\n parserInput.save();\n\n if (name || (parserInput.currentChar() === '@'\n && (name = parserInput.$re(/^(@[\\w-]+)(\\(\\s*\\))?/)))) {\n\n lookups = this.mixin.ruleLookups();\n\n if (!lookups && ((inValue && parserInput.$str('()') !== '()') || (name[2] !== '()'))) {\n parserInput.restore('Missing \\'[...]\\' lookup in variable call');\n return;\n }\n\n if (!inValue) {\n name = name[1];\n }\n\n if (lookups && parsers.important()) {\n important = true;\n }\n\n const call = new tree.VariableCall(name, i, fileInfo);\n if (!inValue && parsers.end()) {\n parserInput.forget();\n return call;\n }\n else {\n parserInput.forget();\n return new tree.NamespaceValue(call, lookups, important, i, fileInfo);\n }\n }\n\n parserInput.restore();\n },\n\n //\n // extend syntax - used to extend selectors\n //\n extend: function(isRule) {\n let elements;\n let e;\n const index = parserInput.i;\n let option;\n let extendList;\n let extend;\n\n if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) {\n return;\n }\n\n do {\n option = null;\n elements = null;\n while (!(option = parserInput.$re(/^(all)(?=\\s*(\\)|,))/))) {\n e = this.element();\n if (!e) {\n break;\n }\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n }\n\n option = option && option[1];\n if (!elements) {\n error('Missing target selector for :extend().');\n }\n extend = new(tree.Extend)(new(tree.Selector)(elements), option, index, fileInfo);\n if (extendList) {\n extendList.push(extend);\n } else {\n extendList = [ extend ];\n }\n } while (parserInput.$char(','));\n\n expect(/^\\)/);\n\n if (isRule) {\n expect(/^;/);\n }\n\n return extendList;\n },\n\n //\n // extendRule - used in a rule to extend all the parent selectors\n //\n extendRule: function() {\n return this.extend(true);\n },\n\n //\n // Mixins\n //\n mixin: {\n //\n // A Mixin call, with an optional argument list\n //\n // #mixins > .square(#fff);\n // #mixins.square(#fff);\n // .rounded(4px, black);\n // .button;\n //\n // We can lookup / return a value using the lookup syntax:\n //\n // color: #mixin.square(#fff)[@color];\n //\n // The `while` loop is there because mixins can be\n // namespaced, but we only support the child and descendant\n // selector for now.\n //\n call: function (inValue, getLookup) {\n const s = parserInput.currentChar();\n let important = false;\n let lookups;\n const index = parserInput.i;\n let elements;\n let args;\n let hasParens;\n\n if (s !== '.' && s !== '#') { return; }\n\n parserInput.save(); // stop us absorbing part of an invalid selector\n\n elements = this.elements();\n\n if (elements) {\n if (parserInput.$char('(')) {\n args = this.args(true).args;\n expectChar(')');\n hasParens = true;\n }\n\n if (getLookup !== false) {\n lookups = this.ruleLookups();\n }\n if (getLookup === true && !lookups) {\n parserInput.restore();\n return;\n }\n\n if (inValue && !lookups && !hasParens) {\n // This isn't a valid in-value mixin call\n parserInput.restore();\n return;\n }\n\n if (!inValue && parsers.important()) {\n important = true;\n }\n\n if (inValue || parsers.end()) {\n parserInput.forget();\n const mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important);\n if (lookups) {\n return new tree.NamespaceValue(mixin, lookups, important);\n }\n else {\n return mixin;\n }\n }\n }\n\n parserInput.restore();\n },\n /**\n * Matching elements for mixins\n * (Start with . or # and can have > )\n */\n elements: function() {\n let elements;\n let e;\n let c;\n let elem;\n let elemIndex;\n const re = /^[#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/;\n while (true) {\n elemIndex = parserInput.i;\n e = parserInput.$re(re);\n \n if (!e) {\n break;\n }\n elem = new(tree.Element)(c, e, false, elemIndex, fileInfo);\n if (elements) {\n elements.push(elem);\n } else {\n elements = [ elem ];\n }\n c = parserInput.$char('>');\n }\n return elements;\n },\n args: function (isCall) {\n const entities = parsers.entities;\n const returner = { args:null, variadic: false };\n let expressions = [];\n const argsSemiColon = [];\n const argsComma = [];\n let isSemiColonSeparated;\n let expressionContainsNamed;\n let name;\n let nameLoop;\n let value;\n let arg;\n let expand;\n let hasSep = true;\n\n parserInput.save();\n\n while (true) {\n if (isCall) {\n arg = parsers.detachedRuleset() || parsers.expression();\n } else {\n parserInput.commentStore.length = 0;\n if (parserInput.$str('...')) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ variadic: true });\n break;\n }\n arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true);\n }\n\n if (!arg || !hasSep) {\n break;\n }\n\n nameLoop = null;\n if (arg.throwAwayComments) {\n arg.throwAwayComments();\n }\n value = arg;\n let val = null;\n\n if (isCall) {\n // Variable\n if (arg.value && arg.value.length == 1) {\n val = arg.value[0];\n }\n } else {\n val = arg;\n }\n\n if (val && (val instanceof tree.Variable || val instanceof tree.Property)) {\n if (parserInput.$char(':')) {\n if (expressions.length > 0) {\n if (isSemiColonSeparated) {\n error('Cannot mix ; and , as delimiter types');\n }\n expressionContainsNamed = true;\n }\n\n value = parsers.detachedRuleset() || parsers.expression();\n\n if (!value) {\n if (isCall) {\n error('could not understand value for named argument');\n } else {\n parserInput.restore();\n returner.args = [];\n return returner;\n }\n }\n nameLoop = (name = val.name);\n } else if (parserInput.$str('...')) {\n if (!isCall) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ name: arg.name, variadic: true });\n break;\n } else {\n expand = true;\n }\n } else if (!isCall) {\n name = nameLoop = val.name;\n value = null;\n }\n }\n\n if (value) {\n expressions.push(value);\n }\n\n argsComma.push({ name:nameLoop, value, expand });\n\n if (parserInput.$char(',')) {\n hasSep = true;\n continue;\n }\n hasSep = parserInput.$char(';') === ';';\n\n if (hasSep || isSemiColonSeparated) {\n\n if (expressionContainsNamed) {\n error('Cannot mix ; and , as delimiter types');\n }\n\n isSemiColonSeparated = true;\n\n if (expressions.length > 1) {\n value = new(tree.Value)(expressions);\n }\n argsSemiColon.push({ name, value, expand });\n\n name = null;\n expressions = [];\n expressionContainsNamed = false;\n }\n }\n\n parserInput.forget();\n returner.args = isSemiColonSeparated ? argsSemiColon : argsComma;\n return returner;\n },\n //\n // A Mixin definition, with a list of parameters\n //\n // .rounded (@radius: 2px, @color) {\n // ...\n // }\n //\n // Until we have a finer grained state-machine, we have to\n // do a look-ahead, to make sure we don't have a mixin call.\n // See the `rule` function for more information.\n //\n // We start by matching `.rounded (`, and then proceed on to\n // the argument list, which has optional default values.\n // We store the parameters in `params`, with a `value` key,\n // if there is a value, such as in the case of `@radius`.\n //\n // Once we've got our params list, and a closing `)`, we parse\n // the `{...}` block.\n //\n definition: function () {\n let name;\n let params = [];\n let match;\n let ruleset;\n let cond;\n let variadic = false;\n if ((parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#') ||\n parserInput.peek(/^[^{]*\\}/)) {\n return;\n }\n\n parserInput.save();\n\n match = parserInput.$re(/^([#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\\s*\\(/);\n if (match) {\n name = match[1];\n\n const argInfo = this.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n\n // .mixincall(\"@{a}\");\n // looks a bit like a mixin definition..\n // also\n // .mixincall(@a: {rule: set;});\n // so we have to be nice and restore\n if (!parserInput.$char(')')) {\n parserInput.restore('Missing closing \\')\\'');\n return;\n }\n\n parserInput.commentStore.length = 0;\n\n if (parserInput.$str('when')) { // Guard\n cond = expect(parsers.conditions, 'expected condition');\n }\n\n ruleset = parsers.block();\n\n if (ruleset) {\n parserInput.forget();\n return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);\n } else {\n parserInput.restore();\n }\n } else {\n parserInput.forget();\n }\n },\n \n ruleLookups: function() {\n let rule;\n let args;\n const lookups = [];\n\n if (parserInput.currentChar() !== '[') { \n return;\n }\n\n while (true) {\n parserInput.save();\n args = null;\n rule = this.lookupValue();\n if (!rule && rule !== '') {\n parserInput.restore();\n break;\n }\n lookups.push(rule);\n parserInput.forget();\n }\n if (lookups.length > 0) {\n return lookups;\n }\n },\n \n lookupValue: function() {\n parserInput.save();\n \n if (!parserInput.$char('[')) { \n parserInput.restore();\n return;\n }\n \n const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/);\n \n if (!parserInput.$char(']')) {\n parserInput.restore();\n return;\n } \n\n if (name || name === '') {\n parserInput.forget();\n return name;\n }\n \n parserInput.restore();\n }\n },\n //\n // Entities are the smallest recognized token,\n // and can be found inside a rule's value.\n //\n entity: function () {\n const entities = this.entities;\n\n return this.comment() || entities.literal() || entities.variable() || entities.url() ||\n entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) ||\n entities.javascript();\n },\n\n //\n // A Declaration terminator. Note that we use `peek()` to check for '}',\n // because the `block` rule will be expecting it, but we still need to make sure\n // it's there, if ';' was omitted.\n //\n end: function () {\n return parserInput.$char(';') || parserInput.peek('}');\n },\n\n //\n // IE's alpha function\n //\n // alpha(opacity=88)\n //\n ieAlpha: function () {\n let value;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (!parserInput.$re(/^opacity=/i)) { return; }\n value = parserInput.$re(/^\\d+/);\n if (!value) {\n value = expect(parsers.entities.variable, 'Could not parse alpha');\n value = `@{${value.name.slice(1)}}`;\n }\n expectChar(')');\n return new tree.Quoted('', `alpha(opacity=${value})`);\n },\n\n //\n // A Selector Element\n //\n // div\n // + h1\n // #socks\n // input[type=\"text\"]\n //\n // Elements are the building blocks for Selectors,\n // they are made out of a `Combinator` (see combinator rule),\n // and an element name, such as a tag a class, or `*`.\n //\n element: function () {\n let e;\n let c;\n let v;\n const index = parserInput.i;\n\n c = this.combinator();\n\n e = parserInput.$re(/^(?:\\d+\\.\\d+|\\d+)%/) ||\n parserInput.$re(/^(?:[.#]?|:*)(?:[\\w-]|[^\\x00-\\x9f]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||\n parserInput.$char('*') || parserInput.$char('&') || this.attribute() ||\n parserInput.$re(/^\\([^&()@]+\\)/) || parserInput.$re(/^[\\.#:](?=@)/) ||\n this.entities.variableCurly();\n\n if (!e) {\n parserInput.save();\n if (parserInput.$char('(')) {\n if ((v = this.selector(false)) && parserInput.$char(')')) {\n e = new(tree.Paren)(v);\n parserInput.forget();\n } else {\n parserInput.restore('Missing closing \\')\\'');\n }\n } else {\n parserInput.forget();\n }\n }\n\n if (e) { return new(tree.Element)(c, e, e instanceof tree.Variable, index, fileInfo); }\n },\n\n //\n // Combinators combine elements together, in a Selector.\n //\n // Because our parser isn't white-space sensitive, special care\n // has to be taken, when parsing the descendant combinator, ` `,\n // as it's an empty space. We have to check the previous character\n // in the input, to see if it's a ` ` character. More info on how\n // we deal with this in *combinator.js*.\n //\n combinator: function () {\n let c = parserInput.currentChar();\n\n if (c === '/') {\n parserInput.save();\n const slashedCombinator = parserInput.$re(/^\\/[a-z]+\\//i);\n if (slashedCombinator) {\n parserInput.forget();\n return new(tree.Combinator)(slashedCombinator);\n }\n parserInput.restore();\n }\n\n if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') {\n parserInput.i++;\n if (c === '^' && parserInput.currentChar() === '^') {\n c = '^^';\n parserInput.i++;\n }\n while (parserInput.isWhitespace()) { parserInput.i++; }\n return new(tree.Combinator)(c);\n } else if (parserInput.isWhitespace(-1)) {\n return new(tree.Combinator)(' ');\n } else {\n return new(tree.Combinator)(null);\n }\n },\n //\n // A CSS Selector\n // with less extensions e.g. the ability to extend and guard\n //\n // .class > div + h1\n // li a:hover\n //\n // Selectors are made out of one or more Elements, see above.\n //\n selector: function (isLess) {\n const index = parserInput.i;\n let elements;\n let extendList;\n let c;\n let e;\n let allExtends;\n let when;\n let condition;\n isLess = isLess !== false;\n while ((isLess && (extendList = this.extend())) || (isLess && (when = parserInput.$str('when'))) || (e = this.element())) {\n if (when) {\n condition = expect(this.conditions, 'expected condition');\n } else if (condition) {\n error('CSS guard can only be used at the end of selector');\n } else if (extendList) {\n if (allExtends) {\n allExtends = allExtends.concat(extendList);\n } else {\n allExtends = extendList;\n }\n } else {\n if (allExtends) { error('Extend can only be used at the end of selector'); }\n c = parserInput.currentChar();\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n e = null;\n }\n if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') {\n break;\n }\n }\n\n if (elements) { return new(tree.Selector)(elements, allExtends, condition, index, fileInfo); }\n if (allExtends) { error('Extend must be used to extend a selector, it cannot be used on its own'); }\n },\n selectors: function () {\n let s;\n let selectors;\n while (true) {\n s = this.selector();\n if (!s) {\n break;\n }\n if (selectors) {\n selectors.push(s);\n } else {\n selectors = [ s ];\n }\n parserInput.commentStore.length = 0;\n if (s.condition && selectors.length > 1) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n if (!parserInput.$char(',')) { break; }\n if (s.condition) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n parserInput.commentStore.length = 0;\n }\n return selectors;\n },\n attribute: function () {\n if (!parserInput.$char('[')) { return; }\n\n const entities = this.entities;\n let key;\n let val;\n let op;\n\n if (!(key = entities.variableCurly())) {\n key = expect(/^(?:[_A-Za-z0-9-\\*]*\\|)?(?:[_A-Za-z0-9-]|\\\\.)+/);\n }\n\n op = parserInput.$re(/^[|~*$^]?=/);\n if (op) {\n val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\\w-]+/) || entities.variableCurly();\n }\n\n expectChar(']');\n\n return new(tree.Attribute)(key, op, val);\n },\n\n //\n // The `block` rule is used by `ruleset` and `mixin.definition`.\n // It's a wrapper around the `primary` rule, with added `{}`.\n //\n block: function () {\n let content;\n if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) {\n return content;\n }\n },\n\n blockRuleset: function() {\n let block = this.block();\n\n if (block) {\n block = new tree.Ruleset(null, block);\n }\n return block;\n },\n\n detachedRuleset: function() {\n let argInfo;\n let params;\n let variadic;\n\n parserInput.save();\n if (parserInput.$re(/^[.#]\\(/)) {\n /**\n * DR args currently only implemented for each() function, and not \n * yet settable as `@dr: #(@arg) {}`\n * This should be done when DRs are merged with mixins.\n * See: https://github.com/less/less-meta/issues/16\n */\n argInfo = this.mixin.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return;\n }\n }\n const blockRuleset = this.blockRuleset();\n if (blockRuleset) {\n parserInput.forget();\n if (params) {\n return new tree.mixin.Definition(null, params, blockRuleset, null, variadic);\n }\n return new tree.DetachedRuleset(blockRuleset);\n }\n parserInput.restore();\n },\n\n //\n // div, .class, body > p {...}\n //\n ruleset: function () {\n let selectors;\n let rules;\n let debugInfo;\n\n parserInput.save();\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(parserInput.i);\n }\n\n selectors = this.selectors();\n\n if (selectors && (rules = this.block())) {\n parserInput.forget();\n const ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports);\n if (context.dumpLineNumbers) {\n ruleset.debugInfo = debugInfo;\n }\n return ruleset;\n } else {\n parserInput.restore();\n }\n },\n declaration: function () {\n let name;\n let value;\n const index = parserInput.i;\n let hasDR;\n const c = parserInput.currentChar();\n let important;\n let merge;\n let isVariable;\n\n if (c === '.' || c === '#' || c === '&' || c === ':') { return; }\n\n parserInput.save();\n\n name = this.variable() || this.ruleProperty();\n if (name) {\n isVariable = typeof name === 'string';\n\n if (isVariable) {\n value = this.detachedRuleset();\n if (value) {\n hasDR = true;\n }\n }\n\n parserInput.commentStore.length = 0;\n if (!value) {\n // a name returned by this.ruleProperty() is always an array of the form:\n // [string-1, ..., string-n, \"\"] or [string-1, ..., string-n, \"+\"]\n // where each item is a tree.Keyword or tree.Variable\n merge = !isVariable && name.length > 1 && name.pop().value;\n\n // Custom property values get permissive parsing\n if (name[0].value && name[0].value.slice(0, 2) === '--') {\n value = this.permissiveValue();\n }\n // Try to store values as anonymous\n // If we need the value later we'll re-parse it in ruleset.parseValue\n else {\n value = this.anonymousValue();\n }\n if (value) {\n parserInput.forget();\n // anonymous values absorb the end ';' which is required for them to work\n return new (tree.Declaration)(name, value, false, merge, index, fileInfo);\n }\n\n if (!value) {\n value = this.value();\n }\n\n if (value) {\n important = this.important();\n } else if (isVariable) {\n // As a last resort, try permissiveValue\n value = this.permissiveValue();\n }\n }\n\n if (value && (this.end() || hasDR)) {\n parserInput.forget();\n return new (tree.Declaration)(name, value, important, merge, index, fileInfo);\n }\n else {\n parserInput.restore();\n }\n } else {\n parserInput.restore();\n }\n },\n anonymousValue: function () {\n const index = parserInput.i;\n const match = parserInput.$re(/^([^.#@\\$+\\/'\"*`(;{}-]*);/);\n if (match) {\n return new(tree.Anonymous)(match[1], index);\n }\n },\n /**\n * Used for custom properties, at-rules, and variables (as fallback)\n * Parses almost anything inside of {} [] () \"\" blocks\n * until it reaches outer-most tokens.\n * \n * First, it will try to parse comments and entities to reach\n * the end. This is mostly like the Expression parser except no\n * math is allowed.\n */\n permissiveValue: function (untilTokens) {\n let i;\n let e;\n let done;\n let value;\n const tok = untilTokens || ';';\n const index = parserInput.i;\n const result = [];\n\n function testCurrentChar() {\n const char = parserInput.currentChar();\n if (typeof tok === 'string') {\n return char === tok;\n } else {\n return tok.test(char);\n }\n }\n if (testCurrentChar()) {\n return;\n }\n value = [];\n do {\n e = this.comment();\n if (e) {\n value.push(e);\n continue;\n }\n e = this.entity();\n if (e) {\n value.push(e);\n }\n } while (e);\n\n done = testCurrentChar();\n\n if (value.length > 0) {\n value = new(tree.Expression)(value);\n if (done) {\n return value;\n }\n else {\n result.push(value);\n }\n // Preserve space before $parseUntil as it will not\n if (parserInput.prevChar() === ' ') {\n result.push(new tree.Anonymous(' ', index));\n }\n }\n parserInput.save();\n\n value = parserInput.$parseUntil(tok);\n\n if (value) {\n if (typeof value === 'string') {\n error(`Expected '${value}'`, 'Parse');\n }\n if (value.length === 1 && value[0] === ' ') {\n parserInput.forget();\n return new tree.Anonymous('', index);\n }\n let item;\n for (i = 0; i < value.length; i++) {\n item = value[i];\n if (Array.isArray(item)) {\n // Treat actual quotes as normal quoted values\n result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo));\n }\n else {\n if (i === value.length - 1) {\n item = item.trim();\n }\n // Treat like quoted values, but replace vars like unquoted expressions\n const quote = new tree.Quoted('\\'', item, true, index, fileInfo);\n quote.variableRegex = /@([\\w-]+)/g;\n quote.propRegex = /\\$([\\w-]+)/g;\n result.push(quote);\n }\n }\n parserInput.forget();\n return new tree.Expression(result, true);\n }\n parserInput.restore();\n },\n\n //\n // An @import atrule\n //\n // @import \"lib\";\n //\n // Depending on our environment, importing is done differently:\n // In the browser, it's an XHR request, in Node, it would be a\n // file-system operation. The function used for importing is\n // stored in `import`, which we pass to the Import constructor.\n //\n 'import': function () {\n let path;\n let features;\n const index = parserInput.i;\n\n const dir = parserInput.$re(/^@import?\\s+/);\n\n if (dir) {\n const options = (dir ? this.importOptions() : null) || {};\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n features = this.mediaFeatures();\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon or unrecognised media features on import');\n }\n features = features && new(tree.Value)(features);\n return new(tree.Import)(path, features, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed import statement');\n }\n }\n },\n\n importOptions: function() {\n let o;\n const options = {};\n let optionName;\n let value;\n\n // list of options, surrounded by parens\n if (!parserInput.$char('(')) { return null; }\n do {\n o = this.importOption();\n if (o) {\n optionName = o;\n value = true;\n switch (optionName) {\n case 'css':\n optionName = 'less';\n value = false;\n break;\n case 'once':\n optionName = 'multiple';\n value = false;\n break;\n }\n options[optionName] = value;\n if (!parserInput.$char(',')) { break; }\n }\n } while (o);\n expectChar(')');\n return options;\n },\n\n importOption: function() {\n const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/);\n if (opt) {\n return opt[1];\n }\n },\n\n mediaFeature: function () {\n const entities = this.entities;\n const nodes = [];\n let e;\n let p;\n parserInput.save();\n do {\n e = entities.keyword() || entities.variable() || entities.mixinLookup();\n if (e) {\n nodes.push(e);\n } else if (parserInput.$char('(')) {\n p = this.property();\n e = this.value();\n if (parserInput.$char(')')) {\n if (p && e) {\n nodes.push(new(tree.Paren)(new(tree.Declaration)(p, e, null, null, parserInput.i, fileInfo, true)));\n } else if (e) {\n nodes.push(new(tree.Paren)(e));\n } else {\n error('badly formed media feature definition');\n }\n } else {\n error('Missing closing \\')\\'', 'Parse');\n }\n }\n } while (e);\n\n parserInput.forget();\n if (nodes.length > 0) {\n return new(tree.Expression)(nodes);\n }\n },\n\n mediaFeatures: function () {\n const entities = this.entities;\n const features = [];\n let e;\n do {\n e = this.mediaFeature();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n } else {\n e = entities.variable() || entities.mixinLookup();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n }\n } while (e);\n\n return features.length > 0 ? features : null;\n },\n\n media: function () {\n let features;\n let rules;\n let media;\n let debugInfo;\n const index = parserInput.i;\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(index);\n }\n\n parserInput.save();\n\n if (parserInput.$str('@media')) {\n features = this.mediaFeatures();\n\n rules = this.block();\n\n if (!rules) {\n error('media definitions require block statements after any features');\n }\n\n parserInput.forget();\n\n media = new(tree.Media)(rules, features, index, fileInfo);\n if (context.dumpLineNumbers) {\n media.debugInfo = debugInfo;\n }\n\n return media;\n }\n\n parserInput.restore();\n },\n\n //\n\n // A @plugin directive, used to import plugins dynamically.\n //\n // @plugin (args) \"lib\";\n //\n plugin: function () {\n let path;\n let args;\n let options;\n const index = parserInput.i;\n const dir = parserInput.$re(/^@plugin?\\s+/);\n\n if (dir) {\n args = this.pluginArgs();\n\n if (args) {\n options = {\n pluginArgs: args,\n isPlugin: true\n };\n }\n else {\n options = { isPlugin: true };\n }\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon on @plugin');\n }\n return new(tree.Import)(path, null, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed @plugin statement');\n }\n }\n },\n\n pluginArgs: function() {\n // list of options, surrounded by parens\n parserInput.save();\n if (!parserInput.$char('(')) {\n parserInput.restore();\n return null;\n }\n const args = parserInput.$re(/^\\s*([^\\);]+)\\)\\s*/);\n if (args[1]) {\n parserInput.forget();\n return args[1].trim();\n }\n else { \n parserInput.restore();\n return null;\n }\n },\n\n //\n // A CSS AtRule\n //\n // @charset \"utf-8\";\n //\n atrule: function () {\n const index = parserInput.i;\n let name;\n let value;\n let rules;\n let nonVendorSpecificName;\n let hasIdentifier;\n let hasExpression;\n let hasUnknown;\n let hasBlock = true;\n let isRooted = true;\n\n if (parserInput.currentChar() !== '@') { return; }\n\n value = this['import']() || this.plugin() || this.media();\n if (value) {\n return value;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^@[a-z-]+/);\n\n if (!name) { return; }\n\n nonVendorSpecificName = name;\n if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {\n nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`;\n }\n\n switch (nonVendorSpecificName) {\n case '@charset':\n hasIdentifier = true;\n hasBlock = false;\n break;\n case '@namespace':\n hasExpression = true;\n hasBlock = false;\n break;\n case '@keyframes':\n case '@counter-style':\n hasIdentifier = true;\n break;\n case '@document':\n case '@supports':\n hasUnknown = true;\n isRooted = false;\n break;\n default:\n hasUnknown = true;\n break;\n }\n\n parserInput.commentStore.length = 0;\n\n if (hasIdentifier) {\n value = this.entity();\n if (!value) {\n error(`expected ${name} identifier`);\n }\n } else if (hasExpression) {\n value = this.expression();\n if (!value) {\n error(`expected ${name} expression`);\n }\n } else if (hasUnknown) {\n value = this.permissiveValue(/^[{;]/);\n hasBlock = (parserInput.currentChar() === '{');\n if (!value) {\n if (!hasBlock && parserInput.currentChar() !== ';') {\n error(`${name} rule is missing block or ending semi-colon`);\n }\n }\n else if (!value.value) {\n value = null;\n }\n }\n\n if (hasBlock) {\n rules = this.blockRuleset();\n }\n\n if (rules || (!hasBlock && value && parserInput.$char(';'))) {\n parserInput.forget();\n return new (tree.AtRule)(name, value, rules, index, fileInfo,\n context.dumpLineNumbers ? getDebugInfo(index) : null,\n isRooted\n );\n }\n\n parserInput.restore('at-rule options not recognised');\n },\n\n //\n // A Value is a comma-delimited list of Expressions\n //\n // font-family: Baskerville, Georgia, serif;\n //\n // In a Rule, a Value represents everything after the `:`,\n // and before the `;`.\n //\n value: function () {\n let e;\n const expressions = [];\n const index = parserInput.i;\n\n do {\n e = this.expression();\n if (e) {\n expressions.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n } while (e);\n\n if (expressions.length > 0) {\n return new(tree.Value)(expressions, index);\n }\n },\n important: function () {\n if (parserInput.currentChar() === '!') {\n return parserInput.$re(/^! *important/);\n }\n },\n sub: function () {\n let a;\n let e;\n\n parserInput.save();\n if (parserInput.$char('(')) {\n a = this.addition();\n if (a && parserInput.$char(')')) {\n parserInput.forget();\n e = new(tree.Expression)([a]);\n e.parens = true;\n return e;\n }\n parserInput.restore('Expected \\')\\'');\n return;\n }\n parserInput.restore();\n },\n multiplication: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.operand();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n if (parserInput.peek(/^\\/[*\\/]/)) {\n break;\n }\n\n parserInput.save();\n\n op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./');\n\n if (!op) { parserInput.forget(); break; }\n\n a = this.operand();\n\n if (!a) { parserInput.restore(); break; }\n parserInput.forget();\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n addition: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.multiplication();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n op = parserInput.$re(/^[-+]\\s+/) || (!isSpaced && (parserInput.$char('+') || parserInput.$char('-')));\n if (!op) {\n break;\n }\n a = this.multiplication();\n if (!a) {\n break;\n }\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n conditions: function () {\n let a;\n let b;\n const index = parserInput.i;\n let condition;\n\n a = this.condition(true);\n if (a) {\n while (true) {\n if (!parserInput.peek(/^,\\s*(not\\s*)?\\(/) || !parserInput.$char(',')) {\n break;\n }\n b = this.condition(true);\n if (!b) {\n break;\n }\n condition = new(tree.Condition)('or', condition || a, b, index);\n }\n return condition || a;\n }\n },\n condition: function (needsParens) {\n let result;\n let logical;\n let next;\n function or() {\n return parserInput.$str('or');\n }\n\n result = this.conditionAnd(needsParens);\n if (!result) {\n return ;\n }\n logical = or();\n if (logical) {\n next = this.condition(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n conditionAnd: function (needsParens) {\n let result;\n let logical;\n let next;\n const self = this;\n function insideCondition() {\n const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens);\n if (!cond && !needsParens) {\n return self.atomicCondition(needsParens);\n }\n return cond;\n }\n function and() {\n return parserInput.$str('and');\n }\n\n result = insideCondition();\n if (!result) {\n return ;\n }\n logical = and();\n if (logical) {\n next = this.conditionAnd(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n negatedCondition: function (needsParens) {\n if (parserInput.$str('not')) {\n const result = this.parenthesisCondition(needsParens);\n if (result) {\n result.negate = !result.negate;\n }\n return result;\n }\n },\n parenthesisCondition: function (needsParens) {\n function tryConditionFollowedByParenthesis(me) {\n let body;\n parserInput.save();\n body = me.condition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return ;\n }\n parserInput.forget();\n return body;\n }\n\n let body;\n parserInput.save();\n if (!parserInput.$str('(')) {\n parserInput.restore();\n return ;\n }\n body = tryConditionFollowedByParenthesis(this);\n if (body) {\n parserInput.forget();\n return body;\n }\n\n body = this.atomicCondition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`);\n return ;\n }\n parserInput.forget();\n return body;\n },\n atomicCondition: function (needsParens) {\n const entities = this.entities;\n const index = parserInput.i;\n let a;\n let b;\n let c;\n let op;\n\n function cond() {\n return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup();\n }\n cond = cond.bind(this);\n\n a = cond();\n if (a) {\n if (parserInput.$char('>')) {\n if (parserInput.$char('=')) {\n op = '>=';\n } else {\n op = '>';\n }\n } else\n if (parserInput.$char('<')) {\n if (parserInput.$char('=')) {\n op = '<=';\n } else {\n op = '<';\n }\n } else\n if (parserInput.$char('=')) {\n if (parserInput.$char('>')) {\n op = '=>';\n } else if (parserInput.$char('<')) {\n op = '=<';\n } else {\n op = '=';\n }\n }\n if (op) {\n b = cond();\n if (b) {\n c = new(tree.Condition)(op, a, b, index, false);\n } else {\n error('expected expression');\n }\n } else {\n c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, false);\n }\n return c;\n }\n },\n\n //\n // An operand is anything that can be part of an operation,\n // such as a Color, or a Variable\n //\n operand: function () {\n const entities = this.entities;\n let negate;\n\n if (parserInput.peek(/^-[@\\$\\(]/)) {\n negate = parserInput.$char('-');\n }\n\n let o = this.sub() || entities.dimension() ||\n entities.color() || entities.variable() ||\n entities.property() || entities.call() ||\n entities.quoted(true) || entities.colorKeyword() ||\n entities.mixinLookup();\n\n if (negate) {\n o.parensInOp = true;\n o = new(tree.Negative)(o);\n }\n\n return o;\n },\n\n //\n // Expressions either represent mathematical operations,\n // or white-space delimited Entities.\n //\n // 1px solid black\n // @var * 2\n //\n expression: function () {\n const entities = [];\n let e;\n let delim;\n const index = parserInput.i;\n\n do {\n e = this.comment();\n if (e) {\n entities.push(e);\n continue;\n }\n e = this.addition() || this.entity();\n if (e) {\n entities.push(e);\n // operations do not allow keyword \"/\" dimension (e.g. small/20px) so we support that here\n if (!parserInput.peek(/^\\/[\\/*]/)) {\n delim = parserInput.$char('/');\n if (delim) {\n entities.push(new(tree.Anonymous)(delim, index));\n }\n }\n }\n } while (e);\n if (entities.length > 0) {\n return new(tree.Expression)(entities);\n }\n },\n property: function () {\n const name = parserInput.$re(/^(\\*?-?[_a-zA-Z0-9-]+)\\s*:/);\n if (name) {\n return name[1];\n }\n },\n ruleProperty: function () {\n let name = [];\n const index = [];\n let s;\n let k;\n\n parserInput.save();\n\n const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\\s*:/);\n if (simpleProperty) {\n name = [new(tree.Keyword)(simpleProperty[1])];\n parserInput.forget();\n return name;\n }\n\n function match(re) {\n const i = parserInput.i;\n const chunk = parserInput.$re(re);\n if (chunk) {\n index.push(i);\n return name.push(chunk[1]);\n }\n }\n\n match(/^(\\*?)/);\n while (true) {\n if (!match(/^((?:[\\w-]+)|(?:[@\\$]\\{[\\w-]+\\}))/)) {\n break;\n }\n }\n\n if ((name.length > 1) && match(/^((?:\\+_|\\+)?)\\s*:/)) {\n parserInput.forget();\n\n // at last, we have the complete match now. move forward,\n // convert name particles to tree objects and return:\n if (name[0] === '') {\n name.shift();\n index.shift();\n }\n for (k = 0; k < name.length; k++) {\n s = name[k];\n name[k] = (s.charAt(0) !== '@' && s.charAt(0) !== '$') ?\n new(tree.Keyword)(s) :\n (s.charAt(0) === '@' ?\n new(tree.Variable)(`@${s.slice(2, -1)}`, index[k], fileInfo) :\n new(tree.Property)(`$${s.slice(2, -1)}`, index[k], fileInfo));\n }\n return name;\n }\n parserInput.restore();\n }\n }\n };\n};\nParser.serializeVars = vars => {\n let s = '';\n\n for (const name in vars) {\n if (Object.hasOwnProperty.call(vars, name)) {\n const value = vars[name];\n s += `${((name[0] === '@') ? '' : '@') + name}: ${value}${(String(value).slice(-1) === ';') ? '' : ';'}`;\n }\n }\n\n return s;\n};\n\nexport default Parser;\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nlet colorFunctions;\n\nfunction clamp(val) {\n return Math.min(1, Math.max(0, val));\n}\nfunction hsla(origColor, hsl) {\n const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a);\n if (color) {\n if (origColor.value && \n /^(rgb|hsl)/.test(origColor.value)) {\n color.value = origColor.value;\n } else {\n color.value = 'rgb';\n }\n return color;\n }\n}\nfunction toHSL(color) {\n if (color.toHSL) {\n return color.toHSL();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction toHSV(color) {\n if (color.toHSV) {\n return color.toHSV();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction number(n) {\n if (n instanceof Dimension) {\n return parseFloat(n.unit.is('%') ? n.value / 100 : n.value);\n } else if (typeof n === 'number') {\n return n;\n } else {\n throw {\n type: 'Argument',\n message: 'color functions take numbers as parameters'\n };\n }\n}\nfunction scaled(n, size) {\n if (n instanceof Dimension && n.unit.is('%')) {\n return parseFloat(n.value * size / 100);\n } else {\n return number(n);\n }\n}\ncolorFunctions = {\n rgb: function (r, g, b) {\n const color = colorFunctions.rgba(r, g, b, 1.0);\n if (color) {\n color.value = 'rgb';\n return color;\n }\n },\n rgba: function (r, g, b, a) {\n try {\n if (r instanceof Color) {\n if (g) {\n a = number(g);\n } else {\n a = r.alpha;\n }\n return new Color(r.rgb, a, 'rgba');\n }\n const rgb = [r, g, b].map(c => scaled(c, 255));\n a = number(a);\n return new Color(rgb, a, 'rgba');\n }\n catch (e) {}\n },\n hsl: function (h, s, l) {\n const color = colorFunctions.hsla(h, s, l, 1.0);\n if (color) {\n color.value = 'hsl';\n return color;\n }\n },\n hsla: function (h, s, l, a) {\n try {\n if (h instanceof Color) {\n if (s) {\n a = number(s);\n } else {\n a = h.alpha;\n }\n return new Color(h.rgb, a, 'hsla');\n }\n\n let m1;\n let m2;\n\n function hue(h) {\n h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);\n if (h * 6 < 1) {\n return m1 + (m2 - m1) * h * 6;\n }\n else if (h * 2 < 1) {\n return m2;\n }\n else if (h * 3 < 2) {\n return m1 + (m2 - m1) * (2 / 3 - h) * 6;\n }\n else {\n return m1;\n }\n }\n\n h = (number(h) % 360) / 360;\n s = clamp(number(s));l = clamp(number(l));a = clamp(number(a));\n\n m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;\n m1 = l * 2 - m2;\n\n const rgb = [\n hue(h + 1 / 3) * 255,\n hue(h) * 255,\n hue(h - 1 / 3) * 255\n ];\n a = number(a);\n return new Color(rgb, a, 'hsla');\n }\n catch (e) {}\n },\n\n hsv: function(h, s, v) {\n return colorFunctions.hsva(h, s, v, 1.0);\n },\n\n hsva: function(h, s, v, a) {\n h = ((number(h) % 360) / 360) * 360;\n s = number(s);v = number(v);a = number(a);\n\n let i;\n let f;\n i = Math.floor((h / 60) % 6);\n f = (h / 60) - i;\n\n const vs = [v,\n v * (1 - s),\n v * (1 - f * s),\n v * (1 - (1 - f) * s)];\n const perm = [[0, 3, 1],\n [2, 0, 1],\n [1, 0, 3],\n [1, 2, 0],\n [3, 1, 0],\n [0, 1, 2]];\n\n return colorFunctions.rgba(vs[perm[i][0]] * 255,\n vs[perm[i][1]] * 255,\n vs[perm[i][2]] * 255,\n a);\n },\n\n hue: function (color) {\n return new Dimension(toHSL(color).h);\n },\n saturation: function (color) {\n return new Dimension(toHSL(color).s * 100, '%');\n },\n lightness: function (color) {\n return new Dimension(toHSL(color).l * 100, '%');\n },\n hsvhue: function(color) {\n return new Dimension(toHSV(color).h);\n },\n hsvsaturation: function (color) {\n return new Dimension(toHSV(color).s * 100, '%');\n },\n hsvvalue: function (color) {\n return new Dimension(toHSV(color).v * 100, '%');\n },\n red: function (color) {\n return new Dimension(color.rgb[0]);\n },\n green: function (color) {\n return new Dimension(color.rgb[1]);\n },\n blue: function (color) {\n return new Dimension(color.rgb[2]);\n },\n alpha: function (color) {\n return new Dimension(toHSL(color).a);\n },\n luma: function (color) {\n return new Dimension(color.luma() * color.alpha * 100, '%');\n },\n luminance: function (color) {\n const luminance =\n (0.2126 * color.rgb[0] / 255) +\n (0.7152 * color.rgb[1] / 255) +\n (0.0722 * color.rgb[2] / 255);\n\n return new Dimension(luminance * color.alpha * 100, '%');\n },\n saturate: function (color, amount, method) {\n // filter: saturate(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s += hsl.s * amount.value / 100;\n }\n else {\n hsl.s += amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n desaturate: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s -= hsl.s * amount.value / 100;\n }\n else {\n hsl.s -= amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n lighten: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l += hsl.l * amount.value / 100;\n }\n else {\n hsl.l += amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n darken: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l -= hsl.l * amount.value / 100;\n }\n else {\n hsl.l -= amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n fadein: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a += hsl.a * amount.value / 100;\n }\n else {\n hsl.a += amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fadeout: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a -= hsl.a * amount.value / 100;\n }\n else {\n hsl.a -= amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fade: function (color, amount) {\n const hsl = toHSL(color);\n\n hsl.a = amount.value / 100;\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n spin: function (color, amount) {\n const hsl = toHSL(color);\n const hue = (hsl.h + amount.value) % 360;\n\n hsl.h = hue < 0 ? 360 + hue : hue;\n\n return hsla(color, hsl);\n },\n //\n // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein\n // http://sass-lang.com\n //\n mix: function (color1, color2, weight) {\n if (!weight) {\n weight = new Dimension(50);\n }\n const p = weight.value / 100.0;\n const w = p * 2 - 1;\n const a = toHSL(color1).a - toHSL(color2).a;\n\n const w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;\n const w2 = 1 - w1;\n\n const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,\n color1.rgb[1] * w1 + color2.rgb[1] * w2,\n color1.rgb[2] * w1 + color2.rgb[2] * w2];\n\n const alpha = color1.alpha * p + color2.alpha * (1 - p);\n\n return new Color(rgb, alpha);\n },\n greyscale: function (color) {\n return colorFunctions.desaturate(color, new Dimension(100));\n },\n contrast: function (color, dark, light, threshold) {\n // filter: contrast(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n if (typeof light === 'undefined') {\n light = colorFunctions.rgba(255, 255, 255, 1.0);\n }\n if (typeof dark === 'undefined') {\n dark = colorFunctions.rgba(0, 0, 0, 1.0);\n }\n // Figure out which is actually light and dark:\n if (dark.luma() > light.luma()) {\n const t = light;\n light = dark;\n dark = t;\n }\n if (typeof threshold === 'undefined') {\n threshold = 0.43;\n } else {\n threshold = number(threshold);\n }\n if (color.luma() < threshold) {\n return light;\n } else {\n return dark;\n }\n },\n // Changes made in 2.7.0 - Reverted in 3.0.0\n // contrast: function (color, color1, color2, threshold) {\n // // Return which of `color1` and `color2` has the greatest contrast with `color`\n // // according to the standard WCAG contrast ratio calculation.\n // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef\n // // The threshold param is no longer used, in line with SASS.\n // // filter: contrast(3.2);\n // // should be kept as is, so check for color\n // if (!color.rgb) {\n // return null;\n // }\n // if (typeof color1 === 'undefined') {\n // color1 = colorFunctions.rgba(0, 0, 0, 1.0);\n // }\n // if (typeof color2 === 'undefined') {\n // color2 = colorFunctions.rgba(255, 255, 255, 1.0);\n // }\n // var contrast1, contrast2;\n // var luma = color.luma();\n // var luma1 = color1.luma();\n // var luma2 = color2.luma();\n // // Calculate contrast ratios for each color\n // if (luma > luma1) {\n // contrast1 = (luma + 0.05) / (luma1 + 0.05);\n // } else {\n // contrast1 = (luma1 + 0.05) / (luma + 0.05);\n // }\n // if (luma > luma2) {\n // contrast2 = (luma + 0.05) / (luma2 + 0.05);\n // } else {\n // contrast2 = (luma2 + 0.05) / (luma + 0.05);\n // }\n // if (contrast1 > contrast2) {\n // return color1;\n // } else {\n // return color2;\n // }\n // },\n argb: function (color) {\n return new Anonymous(color.toARGB());\n },\n color: function(c) {\n if ((c instanceof Quoted) &&\n (/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value))) {\n const val = c.value.slice(1);\n return new Color(val, undefined, `#${val}`);\n }\n if ((c instanceof Color) || (c = Color.fromKeyword(c.value))) {\n c.value = undefined;\n return c;\n }\n throw {\n type: 'Argument',\n message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF'\n };\n },\n tint: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount);\n },\n shade: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount);\n }\n};\n\nexport default colorFunctions;\n","import Anonymous from '../tree/anonymous';\nimport Keyword from '../tree/keyword';\n\nfunction boolean(condition) {\n return condition ? Keyword.True : Keyword.False;\n}\n\nfunction If(condition, trueValue, falseValue) {\n return condition ? trueValue\n : (falseValue || new Anonymous);\n}\n\nexport default { boolean, 'if': If };\n","import Color from '../tree/color';\n\n// Color Blending\n// ref: http://www.w3.org/TR/compositing-1\n\nfunction colorBlend(mode, color1, color2) {\n const ab = color1.alpha; // result\n\n let // backdrop\n cb;\n\n const as = color2.alpha;\n\n let // source\n cs;\n\n let ar;\n let cr;\n const r = [];\n\n ar = as + ab * (1 - as);\n for (let i = 0; i < 3; i++) {\n cb = color1.rgb[i] / 255;\n cs = color2.rgb[i] / 255;\n cr = mode(cb, cs);\n if (ar) {\n cr = (as * cs + ab * (cb -\n as * (cb + cs - cr))) / ar;\n }\n r[i] = cr * 255;\n }\n\n return new Color(r, ar);\n}\n\nconst colorBlendModeFunctions = {\n multiply: function(cb, cs) {\n return cb * cs;\n },\n screen: function(cb, cs) {\n return cb + cs - cb * cs;\n },\n overlay: function(cb, cs) {\n cb *= 2;\n return (cb <= 1) ?\n colorBlendModeFunctions.multiply(cb, cs) :\n colorBlendModeFunctions.screen(cb - 1, cs);\n },\n softlight: function(cb, cs) {\n let d = 1;\n let e = cb;\n if (cs > 0.5) {\n e = 1;\n d = (cb > 0.25) ? Math.sqrt(cb)\n : ((16 * cb - 12) * cb + 4) * cb;\n }\n return cb - (1 - 2 * cs) * e * (d - cb);\n },\n hardlight: function(cb, cs) {\n return colorBlendModeFunctions.overlay(cs, cb);\n },\n difference: function(cb, cs) {\n return Math.abs(cb - cs);\n },\n exclusion: function(cb, cs) {\n return cb + cs - 2 * cb * cs;\n },\n\n // non-w3c functions:\n average: function(cb, cs) {\n return (cb + cs) / 2;\n },\n negation: function(cb, cs) {\n return 1 - Math.abs(cb + cs - 1);\n }\n};\n\nfor (const f in colorBlendModeFunctions) {\n if (colorBlendModeFunctions.hasOwnProperty(f)) {\n colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]);\n }\n}\n\nexport default colorBlend;\n","import Comment from '../tree/comment';\nimport Dimension from '../tree/dimension';\nimport Declaration from '../tree/declaration';\nimport Expression from '../tree/expression';\nimport Ruleset from '../tree/ruleset';\nimport Selector from '../tree/selector';\nimport Element from '../tree/element';\nimport Quote from '../tree/quoted';\n\nconst getItemsFromNode = node => {\n // handle non-array values as an array of length 1\n // return 'undefined' if index is invalid\n const items = Array.isArray(node.value) ?\n node.value : Array(node);\n\n return items;\n};\n\nexport default {\n _SELF: function(n) {\n return n;\n },\n extract: function(values, index) {\n index = index.value - 1; // (1-based index)\n\n return getItemsFromNode(values)[index];\n },\n length: function(values) {\n return new Dimension(getItemsFromNode(values).length);\n },\n /**\n * Creates a Less list of incremental values.\n * Modeled after Lodash's range function, also exists natively in PHP\n * \n * @param {Dimension} [start=1]\n * @param {Dimension} end - e.g. 10 or 10px - unit is added to output\n * @param {Dimension} [step=1] \n */\n range: function(start, end, step) {\n let from;\n let to;\n let stepValue = 1;\n const list = [];\n if (end) {\n to = end;\n from = start.value;\n if (step) {\n stepValue = step.value;\n }\n }\n else {\n from = 1;\n to = start;\n }\n\n for (let i = from; i <= to.value; i += stepValue) {\n list.push(new Dimension(i, to.unit));\n }\n\n return new Expression(list);\n },\n each: function(list, rs) {\n const rules = [];\n let newRules;\n let iterator;\n\n if (list.value && !(list instanceof Quote)) {\n if (Array.isArray(list.value)) {\n iterator = list.value;\n } else {\n iterator = [list.value];\n }\n } else if (list.ruleset) {\n iterator = list.ruleset.rules;\n } else if (list.rules) {\n iterator = list.rules;\n } else if (Array.isArray(list)) {\n iterator = list;\n } else {\n iterator = [list];\n }\n\n let valueName = '@value';\n let keyName = '@key';\n let indexName = '@index';\n\n if (rs.params) {\n valueName = rs.params[0] && rs.params[0].name;\n keyName = rs.params[1] && rs.params[1].name;\n indexName = rs.params[2] && rs.params[2].name;\n rs = rs.rules;\n } else {\n rs = rs.ruleset;\n }\n\n for (let i = 0; i < iterator.length; i++) {\n let key;\n let value;\n const item = iterator[i];\n if (item instanceof Declaration) {\n key = typeof item.name === 'string' ? item.name : item.name[0].value;\n value = item.value;\n } else {\n key = new Dimension(i + 1);\n value = item;\n }\n\n if (item instanceof Comment) {\n continue;\n }\n\n newRules = rs.rules.slice(0);\n if (valueName) {\n newRules.push(new Declaration(valueName,\n value,\n false, false, this.index, this.currentFileInfo));\n }\n if (indexName) {\n newRules.push(new Declaration(indexName,\n new Dimension(i + 1),\n false, false, this.index, this.currentFileInfo));\n }\n if (keyName) {\n newRules.push(new Declaration(keyName,\n key,\n false, false, this.index, this.currentFileInfo));\n }\n\n rules.push(new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n newRules,\n rs.strictImports,\n rs.visibilityInfo()\n ));\n }\n\n return new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n rules,\n rs.strictImports,\n rs.visibilityInfo()\n ).eval(this.context);\n }\n};\n","import Dimension from '../tree/dimension';\n\nconst MathHelper = (fn, unit, n) => {\n if (!(n instanceof Dimension)) {\n throw { type: 'Argument', message: 'argument must be a number' };\n }\n if (unit == null) {\n unit = n.unit;\n } else {\n n = n.unify();\n }\n return new Dimension(fn(parseFloat(n.value)), unit);\n};\n\nexport default MathHelper;","import mathHelper from './math-helper.js';\n\nconst mathFunctions = {\n // name, unit\n ceil: null,\n floor: null,\n sqrt: null,\n abs: null,\n tan: '',\n sin: '',\n cos: '',\n atan: 'rad',\n asin: 'rad',\n acos: 'rad'\n};\n\nfor (const f in mathFunctions) {\n if (mathFunctions.hasOwnProperty(f)) {\n mathFunctions[f] = mathHelper.bind(null, Math[f], mathFunctions[f]);\n }\n}\n\nmathFunctions.round = (n, f) => {\n const fraction = typeof f === 'undefined' ? 0 : f.value;\n return mathHelper(num => num.toFixed(fraction), null, n);\n};\n\nexport default mathFunctions;\n","import Dimension from '../tree/dimension';\nimport Anonymous from '../tree/anonymous';\nimport mathHelper from './math-helper.js';\n\nconst minMax = function (isMin, args) {\n args = Array.prototype.slice.call(args);\n switch (args.length) {\n case 0: throw { type: 'Argument', message: 'one or more arguments required' };\n }\n let i; // key is the unit.toString() for unified Dimension values,\n let j;\n let current;\n let currentUnified;\n let referenceUnified;\n let unit;\n let unitStatic;\n let unitClone;\n\n const // elems only contains original argument values.\n order = [];\n\n const values = {};\n // value is the index into the order array.\n for (i = 0; i < args.length; i++) {\n current = args[i];\n if (!(current instanceof Dimension)) {\n if (Array.isArray(args[i].value)) {\n Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value));\n }\n continue;\n }\n currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify();\n unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString();\n unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic;\n unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone;\n j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit];\n if (j === undefined) {\n if (unitStatic !== undefined && unit !== unitStatic) {\n throw { type: 'Argument', message: 'incompatible types' };\n }\n values[unit] = order.length;\n order.push(current);\n continue;\n }\n referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify();\n if ( isMin && currentUnified.value < referenceUnified.value ||\n !isMin && currentUnified.value > referenceUnified.value) {\n order[j] = current;\n }\n }\n if (order.length == 1) {\n return order[0];\n }\n args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', ');\n return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`);\n};\n\nexport default {\n min: function(...args) {\n return minMax(true, args);\n },\n max: function(...args) {\n return minMax(false, args);\n },\n convert: function (val, unit) {\n return val.convertTo(unit.value);\n },\n pi: function () {\n return new Dimension(Math.PI);\n },\n mod: function(a, b) {\n return new Dimension(a.value % b.value, a.unit);\n },\n pow: function(x, y) {\n if (typeof x === 'number' && typeof y === 'number') {\n x = new Dimension(x);\n y = new Dimension(y);\n } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) {\n throw { type: 'Argument', message: 'arguments must be numbers' };\n }\n\n return new Dimension(Math.pow(x.value, y.value), x.unit);\n },\n percentage: function (n) {\n const result = mathHelper(num => num * 100, '%', n);\n\n return result;\n }\n};\n","/**\n * Plugin Manager\n */\nclass PluginManager {\n constructor(less) {\n this.less = less;\n this.visitors = [];\n this.preProcessors = [];\n this.postProcessors = [];\n this.installedPlugins = [];\n this.fileManagers = [];\n this.iterator = -1;\n this.pluginCache = {};\n this.Loader = new less.PluginLoader(less);\n }\n\n /**\n * Adds all the plugins in the array\n * @param {Array} plugins\n */\n addPlugins(plugins) {\n if (plugins) {\n for (let i = 0; i < plugins.length; i++) {\n this.addPlugin(plugins[i]);\n }\n }\n }\n\n /**\n *\n * @param plugin\n * @param {String} filename\n */\n addPlugin(plugin, filename, functionRegistry) {\n this.installedPlugins.push(plugin);\n if (filename) {\n this.pluginCache[filename] = plugin;\n }\n if (plugin.install) {\n plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry);\n }\n }\n\n /**\n *\n * @param filename\n */\n get(filename) {\n return this.pluginCache[filename];\n }\n\n /**\n * Adds a visitor. The visitor object has options on itself to determine\n * when it should run.\n * @param visitor\n */\n addVisitor(visitor) {\n this.visitors.push(visitor);\n }\n\n /**\n * Adds a pre processor object\n * @param {object} preProcessor\n * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import\n */\n addPreProcessor(preProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) {\n if (this.preProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.preProcessors.splice(indexToInsertAt, 0, {preProcessor, priority});\n }\n\n /**\n * Adds a post processor object\n * @param {object} postProcessor\n * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression\n */\n addPostProcessor(postProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) {\n if (this.postProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.postProcessors.splice(indexToInsertAt, 0, {postProcessor, priority});\n }\n\n /**\n *\n * @param manager\n */\n addFileManager(manager) {\n this.fileManagers.push(manager);\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPreProcessors() {\n const preProcessors = [];\n for (let i = 0; i < this.preProcessors.length; i++) {\n preProcessors.push(this.preProcessors[i].preProcessor);\n }\n return preProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPostProcessors() {\n const postProcessors = [];\n for (let i = 0; i < this.postProcessors.length; i++) {\n postProcessors.push(this.postProcessors[i].postProcessor);\n }\n return postProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getVisitors() {\n return this.visitors;\n }\n\n visitor() {\n const self = this;\n return {\n first: function() {\n self.iterator = -1;\n return self.visitors[self.iterator];\n },\n get: function() {\n self.iterator += 1;\n return self.visitors[self.iterator];\n }\n };\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getFileManagers() {\n return this.fileManagers;\n }\n}\n\nlet pm;\n\nconst PluginManagerFactory = (less, newFactory) => {\n if (newFactory || !pm) {\n pm = new PluginManager(less);\n }\n return pm;\n };\n\n//\nexport default PluginManagerFactory;\n","import Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport Quote from '../tree/quoted';\nimport JavaScript from '../tree/javascript';\n\nexport default {\n e: function (str) {\n return new Quote('\"', str instanceof JavaScript ? str.evaluated : str.value, true);\n },\n escape: function (str) {\n return new Anonymous(\n encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B')\n .replace(/\\(/g, '%28').replace(/\\)/g, '%29'));\n },\n replace: function (string, pattern, replacement, flags) {\n let result = string.value;\n replacement = (replacement.type === 'Quoted') ?\n replacement.value : replacement.toCSS();\n result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement);\n return new Quoted(string.quote || '', result, string.escaped);\n },\n '%': function (string /* arg, arg, ... */) {\n const args = Array.prototype.slice.call(arguments, 1);\n let result = string.value;\n\n for (let i = 0; i < args.length; i++) {\n /* jshint loopfunc:true */\n result = result.replace(/%[sda]/i, token => {\n const value = ((args[i].type === 'Quoted') &&\n token.match(/s/i)) ? args[i].value : args[i].toCSS();\n return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;\n });\n }\n result = result.replace(/%%/g, '%');\n return new Quoted(string.quote || '', result, string.escaped);\n }\n};\n","import Keyword from '../tree/keyword';\nimport DetachedRuleset from '../tree/detached-ruleset';\nimport Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport URL from '../tree/url';\nimport Operation from '../tree/operation';\n\nconst isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False;\nconst isunit = (n, unit) => {\n if (unit === undefined) {\n throw { type: 'Argument', message: 'missing the required second argument to isunit.' };\n }\n unit = typeof unit.value === 'string' ? unit.value : unit;\n if (typeof unit !== 'string') {\n throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' };\n }\n return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False;\n};\n\nexport default {\n isruleset: function (n) {\n return isa(n, DetachedRuleset);\n },\n iscolor: function (n) {\n return isa(n, Color);\n },\n isnumber: function (n) {\n return isa(n, Dimension);\n },\n isstring: function (n) {\n return isa(n, Quoted);\n },\n iskeyword: function (n) {\n return isa(n, Keyword);\n },\n isurl: function (n) {\n return isa(n, URL);\n },\n ispixel: function (n) {\n return isunit(n, 'px');\n },\n ispercentage: function (n) {\n return isunit(n, '%');\n },\n isem: function (n) {\n return isunit(n, 'em');\n },\n isunit,\n unit: function (val, unit) {\n if (!(val instanceof Dimension)) {\n throw { type: 'Argument',\n message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` };\n }\n if (unit) {\n if (unit instanceof Keyword) {\n unit = unit.value;\n } else {\n unit = unit.toCSS();\n }\n } else {\n unit = '';\n }\n return new Dimension(val.value, unit);\n },\n 'get-unit': function (n) {\n return new Anonymous(n.unit);\n }\n};\n","import functionRegistry from './function-registry';\nimport functionCaller from './function-caller';\n\nimport boolean from './boolean';\nimport defaultFunc from './default';\nimport color from './color';\nimport colorBlending from './color-blending';\nimport dataUri from './data-uri';\nimport list from './list';\nimport math from './math';\nimport number from './number';\nimport string from './string';\nimport svg from './svg';\nimport types from './types';\n\nexport default environment => {\n const functions = { functionRegistry, functionCaller };\n\n // register functions\n functionRegistry.addMultiple(boolean);\n functionRegistry.addMultiple(defaultFunc);\n functionRegistry.addMultiple(color);\n functionRegistry.addMultiple(colorBlending);\n functionRegistry.addMultiple(dataUri(environment));\n functionRegistry.addMultiple(list);\n functionRegistry.addMultiple(math);\n functionRegistry.addMultiple(number);\n functionRegistry.addMultiple(string);\n functionRegistry.addMultiple(svg(environment));\n functionRegistry.addMultiple(types);\n\n return functions;\n};\n","import Quoted from '../tree/quoted';\nimport URL from '../tree/url';\nimport * as utils from '../utils';\nimport logger from '../logger';\n\nexport default environment => {\n \n const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); \n\n return { 'data-uri': function(mimetypeNode, filePathNode) {\n\n if (!filePathNode) {\n filePathNode = mimetypeNode;\n mimetypeNode = null;\n }\n\n let mimetype = mimetypeNode && mimetypeNode.value;\n let filePath = filePathNode.value;\n const currentFileInfo = this.currentFileInfo;\n const currentDirectory = currentFileInfo.rewriteUrls ?\n currentFileInfo.currentDirectory : currentFileInfo.entryPath;\n\n const fragmentStart = filePath.indexOf('#');\n let fragment = '';\n if (fragmentStart !== -1) {\n fragment = filePath.slice(fragmentStart);\n filePath = filePath.slice(0, fragmentStart);\n }\n const context = utils.clone(this.context);\n context.rawBuffer = true;\n\n const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true);\n\n if (!fileManager) {\n return fallback(this, filePathNode);\n }\n\n let useBase64 = false;\n\n // detect the mimetype if not given\n if (!mimetypeNode) {\n\n mimetype = environment.mimeLookup(filePath);\n\n if (mimetype === 'image/svg+xml') {\n useBase64 = false;\n } else {\n // use base 64 unless it's an ASCII or UTF-8 format\n const charset = environment.charsetLookup(mimetype);\n useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0;\n }\n if (useBase64) { mimetype += ';base64'; }\n }\n else {\n useBase64 = /;base64$/.test(mimetype);\n }\n\n const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment);\n if (!fileSync.contents) {\n logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`);\n return fallback(this, filePathNode || mimetypeNode);\n }\n let buf = fileSync.contents;\n if (useBase64 && !environment.encodeBase64) {\n return fallback(this, filePathNode);\n }\n\n buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf);\n\n const uri = `data:${mimetype},${buf}${fragment}`;\n\n return new URL(new Quoted(`\"${uri}\"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Expression from '../tree/expression';\nimport Quoted from '../tree/quoted';\nimport URL from '../tree/url';\n\nexport default environment => {\n return { 'svg-gradient': function(direction) {\n let stops;\n let gradientDirectionSvg;\n let gradientType = 'linear';\n let rectangleDimension = 'x=\"0\" y=\"0\" width=\"1\" height=\"1\"';\n const renderEnv = {compress: false};\n let returner;\n const directionValue = direction.toCSS(renderEnv);\n let i;\n let color;\n let position;\n let positionValue;\n let alpha;\n\n function throwArgumentDescriptor() {\n throw { type: 'Argument',\n message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' +\n ' end_color [end_position] or direction, color list' };\n }\n\n if (arguments.length == 2) {\n if (arguments[1].value.length < 2) {\n throwArgumentDescriptor();\n }\n stops = arguments[1].value;\n } else if (arguments.length < 3) {\n throwArgumentDescriptor();\n } else {\n stops = Array.prototype.slice.call(arguments, 1);\n }\n\n switch (directionValue) {\n case 'to bottom':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"0%\" y2=\"100%\"';\n break;\n case 'to right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'to bottom right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"100%\"';\n break;\n case 'to top right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"100%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'ellipse':\n case 'ellipse at center':\n gradientType = 'radial';\n gradientDirectionSvg = 'cx=\"50%\" cy=\"50%\" r=\"75%\"';\n rectangleDimension = 'x=\"-50\" y=\"-50\" width=\"101\" height=\"101\"';\n break;\n default:\n throw { type: 'Argument', message: 'svg-gradient direction must be \\'to bottom\\', \\'to right\\',' +\n ' \\'to bottom right\\', \\'to top right\\' or \\'ellipse at center\\'' };\n }\n returner = `<${gradientType}Gradient id=\"g\" ${gradientDirectionSvg}>`;\n\n for (i = 0; i < stops.length; i += 1) {\n if (stops[i] instanceof Expression) {\n color = stops[i].value[0];\n position = stops[i].value[1];\n } else {\n color = stops[i];\n position = undefined;\n }\n\n if (!(color instanceof Color) || (!((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension))) {\n throwArgumentDescriptor();\n }\n positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%';\n alpha = color.alpha;\n returner += ``;\n }\n returner += ``;\n\n returner = encodeURIComponent(returner);\n\n returner = `data:image/svg+xml,${returner}`;\n return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import contexts from './contexts';\nimport visitor from './visitors';\nimport tree from './tree';\n\nexport default (root, options = {}) => {\n let evaldRoot;\n let variables = options.variables;\n const evalEnv = new contexts.Eval(options);\n\n //\n // Allows setting variables with a hash, so:\n //\n // `{ color: new tree.Color('#f01') }` will become:\n //\n // new tree.Declaration('@color',\n // new tree.Value([\n // new tree.Expression([\n // new tree.Color('#f01')\n // ])\n // ])\n // )\n //\n if (typeof variables === 'object' && !Array.isArray(variables)) {\n variables = Object.keys(variables).map(k => {\n let value = variables[k];\n\n if (!(value instanceof tree.Value)) {\n if (!(value instanceof tree.Expression)) {\n value = new tree.Expression([value]);\n }\n value = new tree.Value([value]);\n }\n return new tree.Declaration(`@${k}`, value, false, null, 0);\n });\n evalEnv.frames = [new tree.Ruleset(null, variables)];\n }\n\n const visitors = [\n new visitor.JoinSelectorVisitor(),\n new visitor.MarkVisibleSelectorsVisitor(true),\n new visitor.ExtendVisitor(),\n new visitor.ToCSSVisitor({compress: Boolean(options.compress)})\n ];\n\n const preEvalVisitors = [];\n let v;\n let visitorIterator;\n\n /**\n * first() / get() allows visitors to be added while visiting\n * \n * @todo Add scoping for visitors just like functions for @plugin; right now they're global\n */\n if (options.pluginManager) {\n visitorIterator = options.pluginManager.visitor();\n for (var i = 0; i < 2; i++) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (v.isPreEvalVisitor) {\n if (i === 0 || preEvalVisitors.indexOf(v) === -1) {\n preEvalVisitors.push(v);\n v.run(root);\n }\n }\n else {\n if (i === 0 || visitors.indexOf(v) === -1) {\n if (v.isPreVisitor) {\n visitors.unshift(v);\n }\n else {\n visitors.push(v);\n }\n }\n }\n }\n }\n }\n\n evaldRoot = root.eval(evalEnv);\n\n for (var i = 0; i < visitors.length; i++) {\n visitors[i].run(evaldRoot);\n }\n\n // Run any remaining visitors added after eval pass\n if (options.pluginManager) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (visitors.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) {\n v.run(evaldRoot);\n }\n }\n }\n\n return evaldRoot;\n};\n","import data from './data';\nimport tree from './tree';\nimport Environment from './environment/environment';\nimport AbstractFileManager from './environment/abstract-file-manager';\nimport AbstractPluginLoader from './environment/abstract-plugin-loader';\nimport visitors from './visitors';\nimport Parser from './parser/parser';\nimport Functions from './functions';\nimport contexts from './contexts';\nimport sourceMapOutput from './source-map-output';\nimport sourceMapBuilder from './source-map-builder';\nimport parseTree from './parse-tree';\nimport importManager from './import-manager';\nimport Render from './render';\nimport Parse from './parse';\nimport LessError from './less-error';\nimport transformTree from './transform-tree';\nimport * as utils from './utils';\nimport PluginManager from './plugin-manager';\nimport logger from './logger';\n\nexport default (environment, fileManagers) => {\n const SourceMapOutput = sourceMapOutput(environment);\n const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment);\n const ParseTree = parseTree(SourceMapBuilder);\n const ImportManager = importManager(environment);\n const render = Render(environment, ParseTree, ImportManager);\n const parse = Parse(environment, ParseTree, ImportManager);\n const environ = new Environment(environment, fileManagers);\n const functions = Functions(environment);\n\n const initial = {\n version: [3, 9, 0],\n data,\n tree,\n Environment,\n AbstractFileManager,\n AbstractPluginLoader,\n environment: environ,\n visitors,\n Parser,\n functions,\n contexts,\n SourceMapOutput,\n SourceMapBuilder,\n ParseTree,\n ImportManager,\n render,\n parse,\n LessError,\n transformTree,\n utils,\n PluginManager,\n logger\n };\n\n // Create a public API\n\n const ctor = t => (function(...args) {\n const obj = Object.create(t.prototype);\n t.apply(obj, Array.prototype.slice.call(args, 0));\n return obj;\n });\n let t;\n const api = Object.create(initial);\n for (const n in initial.tree) {\n /* eslint guard-for-in: 0 */\n t = initial.tree[n];\n if (typeof t === 'function') {\n api[n.toLowerCase()] = ctor(t);\n }\n else {\n api[n] = Object.create(null);\n for (const o in t) {\n /* eslint guard-for-in: 0 */\n api[n][o.toLowerCase()] = ctor(t[o]);\n }\n }\n }\n\n return api;\n};\n","export default environment => {\n class SourceMapOutput {\n constructor(options) {\n this._css = [];\n this._rootNode = options.rootNode;\n this._contentsMap = options.contentsMap;\n this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap;\n if (options.sourceMapFilename) {\n this._sourceMapFilename = options.sourceMapFilename.replace(/\\\\/g, '/');\n }\n this._outputFilename = options.outputFilename;\n this.sourceMapURL = options.sourceMapURL;\n if (options.sourceMapBasepath) {\n this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\\\/g, '/');\n }\n if (options.sourceMapRootpath) {\n this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\\\/g, '/');\n if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') {\n this._sourceMapRootpath += '/';\n }\n } else {\n this._sourceMapRootpath = '';\n }\n this._outputSourceFiles = options.outputSourceFiles;\n this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator();\n\n this._lineNumber = 0;\n this._column = 0;\n }\n\n removeBasepath(path) {\n if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) {\n path = path.substring(this._sourceMapBasepath.length);\n if (path.charAt(0) === '\\\\' || path.charAt(0) === '/') {\n path = path.substring(1);\n }\n }\n\n return path;\n }\n\n normalizeFilename(filename) {\n filename = filename.replace(/\\\\/g, '/');\n filename = this.removeBasepath(filename);\n return (this._sourceMapRootpath || '') + filename;\n }\n\n add(chunk, fileInfo, index, mapLines) {\n // ignore adding empty strings\n if (!chunk) {\n return;\n }\n\n let lines;\n let sourceLines;\n let columns;\n let sourceColumns;\n let i;\n\n if (fileInfo && fileInfo.filename) {\n let inputSource = this._contentsMap[fileInfo.filename];\n\n // remove vars/banner added to the top of the file\n if (this._contentsIgnoredCharsMap[fileInfo.filename]) {\n // adjust the index\n index -= this._contentsIgnoredCharsMap[fileInfo.filename];\n if (index < 0) { index = 0; }\n // adjust the source\n inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]);\n }\n\n // ignore empty content\n if (inputSource === undefined) {\n return;\n }\n\n inputSource = inputSource.substring(0, index);\n sourceLines = inputSource.split('\\n');\n sourceColumns = sourceLines[sourceLines.length - 1];\n }\n\n lines = chunk.split('\\n');\n columns = lines[lines.length - 1];\n\n if (fileInfo && fileInfo.filename) {\n if (!mapLines) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column},\n original: { line: sourceLines.length, column: sourceColumns.length},\n source: this.normalizeFilename(fileInfo.filename)});\n } else {\n for (i = 0; i < lines.length; i++) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0},\n original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0},\n source: this.normalizeFilename(fileInfo.filename)});\n }\n }\n }\n\n if (lines.length === 1) {\n this._column += columns.length;\n } else {\n this._lineNumber += lines.length - 1;\n this._column = columns.length;\n }\n\n this._css.push(chunk);\n }\n\n isEmpty() {\n return this._css.length === 0;\n }\n\n toCSS(context) {\n this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null });\n\n if (this._outputSourceFiles) {\n for (const filename in this._contentsMap) {\n if (this._contentsMap.hasOwnProperty(filename)) {\n let source = this._contentsMap[filename];\n if (this._contentsIgnoredCharsMap[filename]) {\n source = source.slice(this._contentsIgnoredCharsMap[filename]);\n }\n this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source);\n }\n }\n }\n\n this._rootNode.genCSS(context, this);\n\n if (this._css.length > 0) {\n let sourceMapURL;\n const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON());\n\n if (this.sourceMapURL) {\n sourceMapURL = this.sourceMapURL;\n } else if (this._sourceMapFilename) {\n sourceMapURL = this._sourceMapFilename;\n }\n this.sourceMapURL = sourceMapURL;\n\n this.sourceMap = sourceMapContent;\n }\n\n return this._css.join('');\n }\n }\n\n return SourceMapOutput;\n};\n","export default (SourceMapOutput, environment) => {\n class SourceMapBuilder {\n constructor(options) {\n this.options = options;\n }\n\n toCSS(rootNode, options, imports) {\n const sourceMapOutput = new SourceMapOutput(\n {\n contentsIgnoredCharsMap: imports.contentsIgnoredChars,\n rootNode,\n contentsMap: imports.contents,\n sourceMapFilename: this.options.sourceMapFilename,\n sourceMapURL: this.options.sourceMapURL,\n outputFilename: this.options.sourceMapOutputFilename,\n sourceMapBasepath: this.options.sourceMapBasepath,\n sourceMapRootpath: this.options.sourceMapRootpath,\n outputSourceFiles: this.options.outputSourceFiles,\n sourceMapGenerator: this.options.sourceMapGenerator,\n sourceMapFileInline: this.options.sourceMapFileInline\n });\n\n const css = sourceMapOutput.toCSS(options);\n this.sourceMap = sourceMapOutput.sourceMap;\n this.sourceMapURL = sourceMapOutput.sourceMapURL;\n if (this.options.sourceMapInputFilename) {\n this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename);\n }\n if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) {\n this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL);\n }\n return css + this.getCSSAppendage();\n }\n\n getCSSAppendage() {\n\n let sourceMapURL = this.sourceMapURL;\n if (this.options.sourceMapFileInline) {\n if (this.sourceMap === undefined) {\n return '';\n }\n sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`;\n }\n\n if (sourceMapURL) {\n return `/*# sourceMappingURL=${sourceMapURL} */`;\n }\n return '';\n }\n\n getExternalSourceMap() {\n return this.sourceMap;\n }\n\n setExternalSourceMap(sourceMap) {\n this.sourceMap = sourceMap;\n }\n\n isInline() {\n return this.options.sourceMapFileInline;\n }\n\n getSourceMapURL() {\n return this.sourceMapURL;\n }\n\n getOutputFilename() {\n return this.options.sourceMapOutputFilename;\n }\n\n getInputFilename() {\n return this.sourceMapInputFilename;\n }\n }\n\n return SourceMapBuilder;\n};\n","import LessError from './less-error';\nimport transformTree from './transform-tree';\nimport logger from './logger';\n\nexport default SourceMapBuilder => {\n class ParseTree {\n constructor(root, imports) {\n this.root = root;\n this.imports = imports;\n }\n\n toCSS(options) {\n let evaldRoot;\n const result = {};\n let sourceMapBuilder;\n try {\n evaldRoot = transformTree(this.root, options);\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n try {\n const compress = Boolean(options.compress);\n if (compress) {\n logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.');\n }\n\n const toCSSOptions = {\n compress,\n dumpLineNumbers: options.dumpLineNumbers,\n strictUnits: Boolean(options.strictUnits),\n numPrecision: 8};\n\n if (options.sourceMap) {\n sourceMapBuilder = new SourceMapBuilder(options.sourceMap);\n result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports);\n } else {\n result.css = evaldRoot.toCSS(toCSSOptions);\n }\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n if (options.pluginManager) {\n const postProcessors = options.pluginManager.getPostProcessors();\n for (let i = 0; i < postProcessors.length; i++) {\n result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options, imports: this.imports });\n }\n }\n if (options.sourceMap) {\n result.map = sourceMapBuilder.getExternalSourceMap();\n }\n\n result.imports = [];\n for (const file in this.imports.files) {\n if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) {\n result.imports.push(file);\n }\n }\n return result;\n }\n }\n\n return ParseTree;\n};\n","import contexts from './contexts';\nimport Parser from './parser/parser';\nimport LessError from './less-error';\nimport * as utils from './utils';\nimport logger from './logger';\n\nexport default environment => {\n // FileInfo = {\n // 'rewriteUrls' - option - whether to adjust URL's to be relative\n // 'filename' - full resolved filename of current file\n // 'rootpath' - path to append to normal URLs for this node\n // 'currentDirectory' - path to the current file, absolute\n // 'rootFilename' - filename of the base file\n // 'entryPath' - absolute path to the entry file\n // 'reference' - whether the file should not be output and only output parts that are referenced\n\n class ImportManager {\n constructor(less, context, rootFileInfo) {\n this.less = less;\n this.rootFilename = rootFileInfo.filename;\n this.paths = context.paths || []; // Search paths, when importing\n this.contents = {}; // map - filename to contents of all the files\n this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore\n this.mime = context.mime;\n this.error = null;\n this.context = context;\n // Deprecated? Unused outside of here, could be useful.\n this.queue = []; // Files which haven't been imported yet\n this.files = {}; // Holds the imported parse trees.\n }\n\n /**\n * Add an import to be imported\n * @param path - the raw path\n * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension)\n * @param currentFileInfo - the current file info (used for instance to work out relative paths)\n * @param importOptions - import options\n * @param callback - callback for when it is imported\n */\n push(path, tryAppendExtension, currentFileInfo, importOptions, callback) {\n const importManager = this;\n const pluginLoader = this.context.pluginManager.Loader;\n\n this.queue.push(path);\n\n const fileParsedFunc = (e, root, fullPath) => {\n importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue\n\n const importedEqualsRoot = fullPath === importManager.rootFilename;\n if (importOptions.optional && e) {\n callback(null, {rules:[]}, false, null);\n logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`);\n }\n else {\n // Inline imports aren't cached here.\n // If we start to cache them, please make sure they won't conflict with non-inline imports of the\n // same name as they used to do before this comment and the condition below have been added.\n if (!importManager.files[fullPath] && !importOptions.inline) {\n importManager.files[fullPath] = { root, options: importOptions };\n }\n if (e && !importManager.error) { importManager.error = e; }\n callback(e, root, importedEqualsRoot, fullPath);\n }\n };\n\n const newFileInfo = {\n rewriteUrls: this.context.rewriteUrls,\n entryPath: currentFileInfo.entryPath,\n rootpath: currentFileInfo.rootpath,\n rootFilename: currentFileInfo.rootFilename\n };\n\n const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment);\n\n if (!fileManager) {\n fileParsedFunc({ message: `Could not find a file-manager for ${path}` });\n return;\n }\n\n const loadFileCallback = loadedFile => {\n let plugin;\n const resolvedFilename = loadedFile.filename;\n const contents = loadedFile.contents.replace(/^\\uFEFF/, '');\n\n // Pass on an updated rootpath if path of imported file is relative and file\n // is in a (sub|sup) directory\n //\n // Examples:\n // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/',\n // then rootpath should become 'less/module/nav/'\n // - If path of imported file is '../mixins.less' and rootpath is 'less/',\n // then rootpath should become 'less/../'\n newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename);\n if (newFileInfo.rewriteUrls) {\n newFileInfo.rootpath = fileManager.join(\n (importManager.context.rootpath || ''),\n fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath));\n\n if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) {\n newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath);\n }\n }\n newFileInfo.filename = resolvedFilename;\n\n const newEnv = new contexts.Parse(importManager.context);\n\n newEnv.processImports = false;\n importManager.contents[resolvedFilename] = contents;\n\n if (currentFileInfo.reference || importOptions.reference) {\n newFileInfo.reference = true;\n }\n\n if (importOptions.isPlugin) {\n plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo);\n if (plugin instanceof LessError) {\n fileParsedFunc(plugin, null, resolvedFilename);\n }\n else {\n fileParsedFunc(null, plugin, resolvedFilename);\n }\n } else if (importOptions.inline) {\n fileParsedFunc(null, contents, resolvedFilename);\n } else {\n\n // import (multiple) parse trees apparently get altered and can't be cached.\n // TODO: investigate why this is\n if (importManager.files[resolvedFilename]\n && !importManager.files[resolvedFilename].options.multiple\n && !importOptions.multiple) {\n\n fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename);\n }\n else {\n new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => {\n fileParsedFunc(e, root, resolvedFilename);\n });\n }\n }\n };\n let promise;\n const context = utils.clone(this.context);\n\n if (tryAppendExtension) {\n context.ext = importOptions.isPlugin ? '.js' : '.less';\n }\n\n if (importOptions.isPlugin) {\n context.mime = 'application/javascript';\n promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager);\n }\n else {\n promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment,\n (err, loadedFile) => {\n if (err) {\n fileParsedFunc(err);\n } else {\n loadFileCallback(loadedFile);\n }\n });\n }\n if (promise) {\n promise.then(loadFileCallback, fileParsedFunc);\n }\n }\n }\n\n return ImportManager;\n};\n","let PromiseConstructor;\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const render = function (input, options, callback) {\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n render.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n this.parse(input, options, (err, root, imports, options) => {\n if (err) { return callback(err); }\n\n let result;\n try {\n const parseTree = new ParseTree(root, imports);\n result = parseTree.toCSS(options);\n }\n catch (err) { return callback(err); }\n\n callback(null, result);\n });\n }\n };\n\n return render;\n};\n","let PromiseConstructor;\nimport contexts from './contexts';\nimport Parser from './parser/parser';\nimport PluginManager from './plugin-manager';\nimport LessError from './less-error';\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const parse = function (input, options, callback) {\n\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n parse.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n let context;\n let rootFileInfo;\n const pluginManager = new PluginManager(this, !options.reUsePluginManager);\n\n options.pluginManager = pluginManager;\n\n context = new contexts.Parse(options);\n\n if (options.rootFileInfo) {\n rootFileInfo = options.rootFileInfo;\n } else {\n const filename = options.filename || 'input';\n const entryPath = filename.replace(/[^\\/\\\\]*$/, '');\n rootFileInfo = {\n filename,\n rewriteUrls: context.rewriteUrls,\n rootpath: context.rootpath || '',\n currentDirectory: entryPath,\n entryPath,\n rootFilename: filename\n };\n // add in a missing trailing slash\n if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') {\n rootFileInfo.rootpath += '/';\n }\n }\n\n const imports = new ImportManager(this, context, rootFileInfo);\n this.importManager = imports;\n\n // TODO: allow the plugins to be just a list of paths or names\n // Do an async plugin queue like lessc\n\n if (options.plugins) {\n options.plugins.forEach(plugin => {\n let evalResult;\n let contents;\n if (plugin.fileContent) {\n contents = plugin.fileContent.replace(/^\\uFEFF/, '');\n evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename);\n if (evalResult instanceof LessError) {\n return callback(evalResult);\n }\n }\n else {\n pluginManager.addPlugin(plugin);\n }\n });\n }\n\n new Parser(context, imports, rootFileInfo)\n .parse(input, (e, root) => {\n if (e) { return callback(e); }\n callback(null, root, imports, options);\n }, options);\n }\n };\n return parse;\n};\n","/* global window, XMLHttpRequest */\n\nimport AbstractFileManager from '../less/environment/abstract-file-manager.js';\n\nexport default (options, logger) => {\n\n let fileCache = {};\n\n // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load\n const FileManager = () => {\n };\n\n FileManager.prototype = new AbstractFileManager();\n\n FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() {\n return true;\n };\n FileManager.prototype.join = function join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return this.extractUrlParts(laterPath, basePath).path;\n };\n FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) {\n\n const xhr = new XMLHttpRequest();\n const async = options.isFileProtocol ? options.fileAsync : true;\n\n if (typeof xhr.overrideMimeType === 'function') {\n xhr.overrideMimeType('text/css');\n }\n logger.debug(`XHR: Getting '${url}'`);\n xhr.open('GET', url, async);\n xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');\n xhr.send(null);\n\n function handleResponse(xhr, callback, errback) {\n if (xhr.status >= 200 && xhr.status < 300) {\n callback(xhr.responseText,\n xhr.getResponseHeader('Last-Modified'));\n } else if (typeof errback === 'function') {\n errback(xhr.status, url);\n }\n }\n\n if (options.isFileProtocol && !options.fileAsync) {\n if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {\n callback(xhr.responseText);\n } else {\n errback(xhr.status, url);\n }\n } else if (async) {\n xhr.onreadystatechange = () => {\n if (xhr.readyState == 4) {\n handleResponse(xhr, callback, errback);\n }\n };\n } else {\n handleResponse(xhr, callback, errback);\n }\n };\n FileManager.prototype.supports = (filename, currentDirectory, options, environment) => true;\n\n FileManager.prototype.clearFileCache = () => {\n fileCache = {};\n };\n\n FileManager.prototype.loadFile = function loadFile(filename, currentDirectory, options, environment) {\n // TODO: Add prefix support like less-node?\n // What about multiple paths?\n\n if (currentDirectory && !this.isPathAbsolute(filename)) {\n filename = currentDirectory + filename;\n }\n\n filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename;\n\n options = options || {};\n\n // sheet may be set to the stylesheet for the initial load or a collection of properties including\n // some context variables for imports\n const hrefParts = this.extractUrlParts(filename, window.location.href);\n const href = hrefParts.url;\n const self = this;\n \n return new Promise((resolve, reject) => {\n if (options.useFileCache && fileCache[href]) {\n try {\n const lessText = fileCache[href];\n return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }});\n } catch (e) {\n return reject({ filename: href, message: `Error loading file ${href} error was ${e.message}` });\n }\n }\n\n self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) {\n // per file cache\n fileCache[href] = data;\n\n // Use remote copy (re-parse)\n resolve({ contents: data, filename: href, webInfo: { lastModified }});\n }, function doXHRError(status, url) {\n reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href });\n });\n });\n };\n\n return FileManager;\n};\n","// TODO: Add tests for browser @plugin\n/* global window */\n\nimport AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js';\n\n/**\n * Browser Plugin Loader\n */\nclass PluginLoader extends AbstractPluginLoader {\n constructor(less) {\n this.less = less;\n // Should we shim this.require for browser? Probably not?\n }\n\n loadPlugin(filename, basePath, context, environment, fileManager) {\n return new Promise((fulfill, reject) => {\n fileManager.loadFile(filename, basePath, context, environment)\n .then(fulfill).catch(reject);\n });\n }\n}\n\nexport default PluginLoader;\n\n","import * as utils from './utils';\nimport browser from './browser';\n\nexport default (window, less, options) => {\n\n function errorHTML(e, rootHref) {\n const id = `less-error-message:${utils.extractId(rootHref || '')}`;\n const template = '
  • {content}
    • ';\n const elem = window.document.createElement('div');\n let timer;\n let content;\n const errors = [];\n const filename = e.filename || rootHref;\n const filenameNoPath = filename.match(/([^\\/]+(\\?.*)?)$/)[1];\n\n elem.id = id;\n elem.className = 'less-error-message';\n\n content = `

    ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}

    in ${filenameNoPath} `;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += `on line ${e.line}, column ${e.column + 1}:

      ${errors.join('')}
    `;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `
    Stack Trace
    ${e.stack.split('\\n').slice(1).join('
    ')}`;\n }\n elem.innerHTML = content;\n\n // CSS for error messages\n browser.createCSS(window.document, [\n '.less-error-message ul, .less-error-message li {',\n 'list-style-type: none;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message label {',\n 'font-size: 12px;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'color: #cc7777;',\n '}',\n '.less-error-message pre {',\n 'color: #dd6666;',\n 'padding: 4px 0;',\n 'margin: 0;',\n 'display: inline-block;',\n '}',\n '.less-error-message pre.line {',\n 'color: #ff0000;',\n '}',\n '.less-error-message h3 {',\n 'font-size: 20px;',\n 'font-weight: bold;',\n 'padding: 15px 0 5px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message a {',\n 'color: #10a',\n '}',\n '.less-error-message .error {',\n 'color: red;',\n 'font-weight: bold;',\n 'padding-bottom: 2px;',\n 'border-bottom: 1px dashed red;',\n '}'\n ].join('\\n'), { title: 'error-message' });\n\n elem.style.cssText = [\n 'font-family: Arial, sans-serif',\n 'border: 1px solid #e00',\n 'background-color: #eee',\n 'border-radius: 5px',\n '-webkit-border-radius: 5px',\n '-moz-border-radius: 5px',\n 'color: #e00',\n 'padding: 15px',\n 'margin-bottom: 15px'\n ].join(';');\n\n if (options.env === 'development') {\n timer = setInterval(() => {\n const document = window.document;\n const body = document.body;\n if (body) {\n if (document.getElementById(id)) {\n body.replaceChild(elem, document.getElementById(id));\n } else {\n body.insertBefore(elem, body.firstChild);\n }\n clearInterval(timer);\n }\n }, 10);\n }\n }\n\n function removeErrorHTML(path) {\n const node = window.document.getElementById(`less-error-message:${utils.extractId(path)}`);\n if (node) {\n node.parentNode.removeChild(node);\n }\n }\n\n function removeErrorConsole(path) {\n // no action\n }\n\n function removeError(path) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n removeErrorHTML(path);\n } else if (options.errorReporting === 'console') {\n removeErrorConsole(path);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('remove', path);\n }\n }\n\n function errorConsole(e, rootHref) {\n const template = '{line} {content}';\n const filename = e.filename || rootHref;\n const errors = [];\n let content = `${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'} in ${filename}`;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += ` on line ${e.line}, column ${e.column + 1}:\\n${errors.join('\\n')}`;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `\\nStack Trace\\n${e.stack}`;\n }\n less.logger.error(content);\n }\n\n function error(e, rootHref) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n errorHTML(e, rootHref);\n } else if (options.errorReporting === 'console') {\n errorConsole(e, rootHref);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('add', e, rootHref);\n }\n }\n\n return {\n add: error,\n remove: removeError\n };\n};\n","/**\n * Kicks off less and compiles any stylesheets\n * used in the browser distributed version of less\n * to kick-start less using the browser api\n */\n/* global window, document */\n\nimport defaultOptions from '../less/default-options';\nimport addDefaultOptions from './add-default-options';\nimport root from './index';\n\nconst options = defaultOptions();\n\nif (window.less) {\n for (const key in window.less) {\n if (window.less.hasOwnProperty(key)) {\n options[key] = window.less[key];\n }\n }\n}\naddDefaultOptions(window, options);\n\noptions.plugins = options.plugins || [];\n\nif (window.LESS_PLUGINS) {\n options.plugins = options.plugins.concat(window.LESS_PLUGINS);\n}\n\nconst less = root(window, options);\nexport default less;\n\nwindow.less = less;\n\nlet css;\nlet head;\nlet style;\n\n// Always restore page visibility\nfunction resolveOrReject(data) {\n if (data.filename) {\n console.warn(data);\n }\n if (!options.async) {\n head.removeChild(style);\n }\n}\n\nif (options.onReady) {\n if (/!watch/.test(window.location.hash)) {\n less.watch();\n }\n // Simulate synchronous stylesheet loading by hiding page rendering\n if (!options.async) {\n css = 'body { display: none !important }';\n head = document.head || document.getElementsByTagName('head')[0];\n style = document.createElement('style');\n\n style.type = 'text/css';\n if (style.styleSheet) {\n style.styleSheet.cssText = css;\n } else {\n style.appendChild(document.createTextNode(css));\n }\n\n head.appendChild(style);\n }\n less.registerStylesheetsImmediately();\n less.pageLoadFinished = less.refresh(less.env === 'development').then(resolveOrReject, resolveOrReject);\n}\n","// Export a new default each time\nexport default () => ({\n /* Inline Javascript - @plugin still allowed */\n javascriptEnabled: false,\n\n /* Outputs a makefile import dependency list to stdout. */\n depends: false,\n\n /* (DEPRECATED) Compress using less built-in compression. \n * This does an okay job but does not utilise all the tricks of \n * dedicated css compression. */\n compress: false,\n\n /* Runs the less parser and just reports errors without any output. */\n lint: false,\n\n /* Sets available include paths.\n * If the file in an @import rule does not exist at that exact location, \n * less will look for it at the location(s) passed to this option. \n * You might use this for instance to specify a path to a library which \n * you want to be referenced simply and relatively in the less files. */\n paths: [],\n\n /* color output in the terminal */\n color: true,\n\n /* The strictImports controls whether the compiler will allow an @import inside of either \n * @media blocks or (a later addition) other selector blocks.\n * See: https://github.com/less/less.js/issues/656 */\n strictImports: false,\n\n /* Allow Imports from Insecure HTTPS Hosts */\n insecure: false,\n\n /* Allows you to add a path to every generated import and url in your css. \n * This does not affect less import statements that are processed, just ones \n * that are left in the output css. */\n rootpath: '',\n\n /* By default URLs are kept as-is, so if you import a file in a sub-directory \n * that references an image, exactly the same URL will be output in the css. \n * This option allows you to re-write URL's in imported files so that the \n * URL is always relative to the base imported file */\n rewriteUrls: false,\n\n /* Compatibility with IE8. Used for limiting data-uri length */\n // true until 3.0\n ieCompat: false,\n\n /* How to process math \n * 0 always - eagerly try to solve all operations\n * 1 parens-division - require parens for division \"/\"\n * 2 parens | strict - require parens for all operations\n * 3 strict-legacy - legacy strict behavior (super-strict)\n */\n math: 0,\n\n /* Without this option, less attempts to guess at the output unit when it does maths. */\n strictUnits: false,\n\n /* Effectively the declaration is put at the top of your base Less file, \n * meaning it can be used but it also can be overridden if this variable \n * is defined in the file. */\n globalVars: null,\n\n /* As opposed to the global variable option, this puts the declaration at the\n * end of your base file, meaning it will override anything defined in your Less file. */\n modifyVars: null,\n\n /* This option allows you to specify a argument to go on to every URL. */\n urlArgs: ''\n});","import {addDataAttr} from './utils';\nimport browser from './browser';\n\nexport default (window, options) => {\n\n // use options from the current script tag data attribues\n addDataAttr(options, browser.currentScript(window));\n\n if (options.isFileProtocol === undefined) {\n options.isFileProtocol = /^(file|(chrome|safari)(-extension)?|resource|qrc|app):/.test(window.location.protocol);\n }\n\n // Load styles asynchronously (default: false)\n //\n // This is set to `false` by default, so that the body\n // doesn't start loading before the stylesheets are parsed.\n // Setting this to `true` can result in flickering.\n //\n options.async = options.async || false;\n options.fileAsync = options.fileAsync || false;\n\n // Interval between watch polls\n options.poll = options.poll || (options.isFileProtocol ? 1000 : 1500);\n\n options.env = options.env || (window.location.hostname == '127.0.0.1' ||\n window.location.hostname == '0.0.0.0' ||\n window.location.hostname == 'localhost' ||\n (window.location.port &&\n window.location.port.length > 0) ||\n options.isFileProtocol ? 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\ No newline at end of file diff --git a/lib/less-browser/error-reporting.js b/lib/less-browser/error-reporting.js index ebf4860ca..c5606b643 100644 --- a/lib/less-browser/error-reporting.js +++ b/lib/less-browser/error-reporting.js @@ -16,7 +16,8 @@ export default (window, less, options) => { elem.id = id; elem.className = 'less-error-message'; - content = `

    ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}

    in ${filenameNoPath} `; + content = `

    ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}` + + `

    in ${filenameNoPath} `; const errorline = (e, i, classname) => { if (e.extract[i] !== undefined) { diff --git a/lib/less-browser/file-manager.js b/lib/less-browser/file-manager.js index 06e8a7620..6a74aee99 100644 --- a/lib/less-browser/file-manager.js +++ b/lib/less-browser/file-manager.js @@ -2,27 +2,24 @@ import AbstractFileManager from '../less/environment/abstract-file-manager.js'; -export default (options, logger) => { +let options; +let logger; +let fileCache = {}; - let fileCache = {}; - - // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load - const FileManager = () => { - }; - - FileManager.prototype = new AbstractFileManager(); - - FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() { +// TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load +class FileManager extends AbstractFileManager { + alwaysMakePathsAbsolute() { return true; - }; - FileManager.prototype.join = function join(basePath, laterPath) { + } + + join(basePath, laterPath) { if (!basePath) { return laterPath; } return this.extractUrlParts(laterPath, basePath).path; - }; - FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) { + } + doXHR(url, type, callback, errback) { const xhr = new XMLHttpRequest(); const async = options.isFileProtocol ? options.fileAsync : true; @@ -58,14 +55,17 @@ export default (options, logger) => { } else { handleResponse(xhr, callback, errback); } - }; - FileManager.prototype.supports = (filename, currentDirectory, options, environment) => true; + } + + supports() { + return true; + } - FileManager.prototype.clearFileCache = () => { + clearFileCache() { fileCache = {}; - }; + } - FileManager.prototype.loadFile = function loadFile(filename, currentDirectory, options, environment) { + loadFile(filename, currentDirectory, options, environment) { // TODO: Add prefix support like less-node? // What about multiple paths? @@ -103,7 +103,11 @@ export default (options, logger) => { reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href }); }); }); - }; + } +} +export default (opts, log) => { + options = opts; + logger = log; return FileManager; -}; +} diff --git a/lib/less-browser/index.js b/lib/less-browser/index.js index 09b98969a..6ec83bb50 100644 --- a/lib/less-browser/index.js +++ b/lib/less-browser/index.js @@ -70,18 +70,18 @@ export default (window, options) => { /* jshint loopfunc:true */ // use closure to store current style less.render(lessText, instanceOptions, - bind((style, e, result) => { - if (e) { - errors.add(e, 'inline'); + bind((style, e, result) => { + if (e) { + errors.add(e, 'inline'); + } else { + style.type = 'text/css'; + if (style.styleSheet) { + style.styleSheet.cssText = result.css; } else { - style.type = 'text/css'; - if (style.styleSheet) { - style.styleSheet.cssText = result.css; - } else { - style.innerHTML = result.css; - } + style.innerHTML = result.css; } - }, null, style)); + } + }, null, style)); } } } diff --git a/lib/less-browser/plugin-loader.js b/lib/less-browser/plugin-loader.js index 8335db3ab..2ae1d7e75 100644 --- a/lib/less-browser/plugin-loader.js +++ b/lib/less-browser/plugin-loader.js @@ -8,6 +8,8 @@ import AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js' */ class PluginLoader extends AbstractPluginLoader { constructor(less) { + super(); + this.less = less; // Should we shim this.require for browser? Probably not? } diff --git a/lib/less-node/environment.js b/lib/less-node/environment.js index 6fe57b329..a9b790c9b 100644 --- a/lib/less-node/environment.js +++ b/lib/less-node/environment.js @@ -1,6 +1,3 @@ -import mime from 'mime'; -import sourceMap from 'source-map'; - export default { encodeBase64: function encodeBase64(str) { // Avoid Buffer constructor on newer versions of Node.js. @@ -8,12 +5,12 @@ export default { return buffer.toString('base64'); }, mimeLookup: function (filename) { - return mime.lookup(filename); + return require('mime').lookup(filename); }, charsetLookup: function (mime) { - return mime.charsets.lookup(mime); + return require('mime').charsets.lookup(mime); }, getSourceMapGenerator: function getSourceMapGenerator() { - return sourceMap.SourceMapGenerator; + return require('source-map').SourceMapGenerator; } }; diff --git a/lib/less-node/file-manager.js b/lib/less-node/file-manager.js index f45f25428..886b06c93 100644 --- a/lib/less-node/file-manager.js +++ b/lib/less-node/file-manager.js @@ -4,6 +4,8 @@ import AbstractFileManager from '../less/environment/abstract-file-manager.js'; class FileManager extends AbstractFileManager { constructor() { + super(); + this.contents = {}; } diff --git a/lib/less-node/image-size.js b/lib/less-node/image-size.js index e14ad0cc9..18123f317 100644 --- a/lib/less-node/image-size.js +++ b/lib/less-node/image-size.js @@ -8,7 +8,7 @@ export default environment => { let filePath = filePathNode.value; const currentFileInfo = functionContext.currentFileInfo; const currentDirectory = currentFileInfo.rewriteUrls ? - currentFileInfo.currentDirectory : currentFileInfo.entryPath; + currentFileInfo.currentDirectory : currentFileInfo.entryPath; const fragmentStart = filePath.indexOf('#'); let fragment = ''; diff --git a/lib/less-node/plugin-loader.js b/lib/less-node/plugin-loader.js index 2657a61a0..8bdcb42ef 100644 --- a/lib/less-node/plugin-loader.js +++ b/lib/less-node/plugin-loader.js @@ -6,6 +6,8 @@ import AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js' */ class PluginLoader extends AbstractPluginLoader { constructor(less) { + super(); + this.less = less; this.require = prefix => { prefix = path.dirname(prefix); diff --git a/lib/less-node/url-file-manager.js b/lib/less-node/url-file-manager.js index 0bb132783..b956f05b0 100644 --- a/lib/less-node/url-file-manager.js +++ b/lib/less-node/url-file-manager.js @@ -4,47 +4,46 @@ let request; import AbstractFileManager from '../less/environment/abstract-file-manager.js'; import logger from '../less/logger'; -const UrlFileManager = () => { -}; - -UrlFileManager.prototype = new AbstractFileManager(); - -UrlFileManager.prototype.supports = (filename, currentDirectory, options, environment) => isUrlRe.test( filename ) || isUrlRe.test(currentDirectory); - -UrlFileManager.prototype.loadFile = (filename, currentDirectory, options, environment) => { - return new Promise((fulfill, reject) => { - if (request === undefined) { - try { request = require('request'); } - catch (e) { request = null; } - } - if (!request) { - reject({ type: 'File', message: 'optional dependency \'request\' required to import over http(s)\n' }); - return; - } - - let urlStr = isUrlRe.test( filename ) ? filename : url.resolve(currentDirectory, filename); - const urlObj = url.parse(urlStr); - - if (!urlObj.protocol) { - urlObj.protocol = 'http'; - urlStr = urlObj.format(); - } - - request.get({uri: urlStr, strictSSL: !options.insecure }, (error, res, body) => { - if (error) { - reject({ type: 'File', message: `resource '${urlStr}' gave this Error:\n ${error}\n` }); - return; +class UrlFileManager extends AbstractFileManager { + supports(filename, currentDirectory, options, environment) { + return isUrlRe.test( filename ) || isUrlRe.test(currentDirectory); + } + + loadFile(filename, currentDirectory, options, environment) { + return new Promise((fulfill, reject) => { + if (request === undefined) { + try { request = require('request'); } + catch (e) { request = null; } } - if (res && res.statusCode === 404) { - reject({ type: 'File', message: `resource '${urlStr}' was not found\n` }); + if (!request) { + reject({ type: 'File', message: 'optional dependency \'request\' required to import over http(s)\n' }); return; } - if (!body) { - logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`); + + let urlStr = isUrlRe.test( filename ) ? filename : url.resolve(currentDirectory, filename); + const urlObj = url.parse(urlStr); + + if (!urlObj.protocol) { + urlObj.protocol = 'http'; + urlStr = urlObj.format(); } - fulfill({ contents: body, filename: urlStr }); + + request.get({uri: urlStr, strictSSL: !options.insecure }, (error, res, body) => { + if (error) { + reject({ type: 'File', message: `resource '${urlStr}' gave this Error:\n ${error}\n` }); + return; + } + if (res && res.statusCode === 404) { + reject({ type: 'File', message: `resource '${urlStr}' was not found\n` }); + return; + } + if (!body) { + logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`); + } + fulfill({ contents: body, filename: urlStr }); + }); }); - }); -}; + } +} export default UrlFileManager; diff --git a/lib/less/contexts.js b/lib/less/contexts.js index 0d8fd6e22..829760a6e 100644 --- a/lib/less/contexts.js +++ b/lib/less/contexts.js @@ -30,7 +30,7 @@ const parseCopyProperties = [ 'useFileCache', // browser only - whether to use the per file session cache // context 'processImports', // option & context - whether to process imports. if false then imports will not be imported. - // Used by the import manager to stop multiple import visitors being created. + // Used by the import manager to stop multiple import visitors being created. 'pluginManager' // Used as the plugin manager for the session ]; @@ -43,7 +43,6 @@ contexts.Parse = function(options) { const evalCopyProperties = [ 'paths', // additional include paths 'compress', // whether to compress - 'ieCompat', // whether to enforce IE compatibility (IE8 data-uri) 'math', // whether math has to be within parenthesis 'strictUnits', // whether units need to evaluate correctly 'sourceMap', // whether to output a source map @@ -55,111 +54,111 @@ const evalCopyProperties = [ 'rewriteUrls' // option - whether to adjust URL's to be relative ]; -contexts.Eval = function(options, frames) { - copyFromOriginal(options, this, evalCopyProperties); +function isPathRelative(path) { + return !/^(?:[a-z-]+:|\/|#)/i.test(path); +} - if (typeof this.paths === 'string') { this.paths = [this.paths]; } +function isPathLocalRelative(path) { + return path.charAt(0) === '.'; +} - this.frames = frames || []; - this.importantScope = this.importantScope || []; -}; +contexts.Eval = class { + constructor(options, frames) { + copyFromOriginal(options, this, evalCopyProperties); -contexts.Eval.prototype.enterCalc = function () { - if (!this.calcStack) { - this.calcStack = []; - } - this.calcStack.push(true); - this.inCalc = true; -}; + if (typeof this.paths === 'string') { this.paths = [this.paths]; } -contexts.Eval.prototype.exitCalc = function () { - this.calcStack.pop(); - if (!this.calcStack) { + this.frames = frames || []; + this.importantScope = this.importantScope || []; this.inCalc = false; + this.mathOn = true; } -}; -contexts.Eval.prototype.inParenthesis = function () { - if (!this.parensStack) { - this.parensStack = []; + enterCalc() { + if (!this.calcStack) { + this.calcStack = []; + } + this.calcStack.push(true); + this.inCalc = true; } - this.parensStack.push(true); -}; - -contexts.Eval.prototype.outOfParenthesis = function () { - this.parensStack.pop(); -}; -contexts.Eval.prototype.inCalc = false; -contexts.Eval.prototype.mathOn = true; -contexts.Eval.prototype.isMathOn = function (op) { - if (!this.mathOn) { - return false; - } - if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) { - return false; - } - if (this.math > Constants.Math.PARENS_DIVISION) { - return this.parensStack && this.parensStack.length; + exitCalc() { + this.calcStack.pop(); + if (!this.calcStack) { + this.inCalc = false; + } } - return true; -}; -contexts.Eval.prototype.pathRequiresRewrite = function (path) { - const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; + inParenthesis() { + if (!this.parensStack) { + this.parensStack = []; + } + this.parensStack.push(true); + }; - return isRelative(path); -}; + outOfParenthesis() { + this.parensStack.pop(); + }; -contexts.Eval.prototype.rewritePath = function (path, rootpath) { - let newPath; + isMathOn(op) { + if (!this.mathOn) { + return false; + } + if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) { + return false; + } + if (this.math > Constants.Math.PARENS_DIVISION) { + return this.parensStack && this.parensStack.length; + } + return true; + } - rootpath = rootpath || ''; - newPath = this.normalizePath(rootpath + path); + pathRequiresRewrite(path) { + const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; - // If a path was explicit relative and the rootpath was not an absolute path - // we must ensure that the new path is also explicit relative. - if (isPathLocalRelative(path) && - isPathRelative(rootpath) && - isPathLocalRelative(newPath) === false) { - newPath = `./${newPath}`; + return isRelative(path); } - return newPath; -}; + rewritePath(path, rootpath) { + let newPath; + + rootpath = rootpath || ''; + newPath = this.normalizePath(rootpath + path); -contexts.Eval.prototype.normalizePath = path => { - const segments = path.split('/').reverse(); - let segment; - - path = []; - while (segments.length !== 0) { - segment = segments.pop(); - switch ( segment ) { - case '.': - break; - case '..': - if ((path.length === 0) || (path[path.length - 1] === '..')) { - path.push( segment ); - } else { - path.pop(); - } - break; - default: - path.push(segment); - break; + // If a path was explicit relative and the rootpath was not an absolute path + // we must ensure that the new path is also explicit relative. + if (isPathLocalRelative(path) && + isPathRelative(rootpath) && + isPathLocalRelative(newPath) === false) { + newPath = `./${newPath}`; } - } - return path.join('/'); -}; + return newPath; + } -function isPathRelative(path) { - return !/^(?:[a-z-]+:|\/|#)/i.test(path); -} + normalizePath(path) { + const segments = path.split('/').reverse(); + let segment; + + path = []; + while (segments.length !== 0) { + segment = segments.pop(); + switch ( segment ) { + case '.': + break; + case '..': + if ((path.length === 0) || (path[path.length - 1] === '..')) { + path.push( segment ); + } else { + path.pop(); + } + break; + default: + path.push(segment); + break; + } + } -function isPathLocalRelative(path) { - return path.charAt(0) === '.'; + return path.join('/'); + } } - -// todo - do the same for the toCSS ? diff --git a/lib/less/default-options.js b/lib/less/default-options.js index 5df7dc658..a87b84333 100644 --- a/lib/less/default-options.js +++ b/lib/less/default-options.js @@ -1,72 +1,68 @@ // Export a new default each time export default () => ({ - /* Inline Javascript - @plugin still allowed */ - javascriptEnabled: false, + /* Inline Javascript - @plugin still allowed */ + javascriptEnabled: false, - /* Outputs a makefile import dependency list to stdout. */ - depends: false, + /* Outputs a makefile import dependency list to stdout. */ + depends: false, - /* (DEPRECATED) Compress using less built-in compression. + /* (DEPRECATED) Compress using less built-in compression. * This does an okay job but does not utilise all the tricks of * dedicated css compression. */ - compress: false, + compress: false, - /* Runs the less parser and just reports errors without any output. */ - lint: false, + /* Runs the less parser and just reports errors without any output. */ + lint: false, - /* Sets available include paths. + /* Sets available include paths. * If the file in an @import rule does not exist at that exact location, * less will look for it at the location(s) passed to this option. * You might use this for instance to specify a path to a library which * you want to be referenced simply and relatively in the less files. */ - paths: [], + paths: [], - /* color output in the terminal */ - color: true, + /* color output in the terminal */ + color: true, - /* The strictImports controls whether the compiler will allow an @import inside of either + /* The strictImports controls whether the compiler will allow an @import inside of either * @media blocks or (a later addition) other selector blocks. * See: https://github.com/less/less.js/issues/656 */ - strictImports: false, + strictImports: false, - /* Allow Imports from Insecure HTTPS Hosts */ - insecure: false, + /* Allow Imports from Insecure HTTPS Hosts */ + insecure: false, - /* Allows you to add a path to every generated import and url in your css. + /* Allows you to add a path to every generated import and url in your css. * This does not affect less import statements that are processed, just ones * that are left in the output css. */ - rootpath: '', + rootpath: '', - /* By default URLs are kept as-is, so if you import a file in a sub-directory + /* By default URLs are kept as-is, so if you import a file in a sub-directory * that references an image, exactly the same URL will be output in the css. * This option allows you to re-write URL's in imported files so that the * URL is always relative to the base imported file */ - rewriteUrls: false, + rewriteUrls: false, - /* Compatibility with IE8. Used for limiting data-uri length */ - // true until 3.0 - ieCompat: false, - - /* How to process math + /* How to process math * 0 always - eagerly try to solve all operations * 1 parens-division - require parens for division "/" * 2 parens | strict - require parens for all operations * 3 strict-legacy - legacy strict behavior (super-strict) */ - math: 0, + math: 0, - /* Without this option, less attempts to guess at the output unit when it does maths. */ - strictUnits: false, + /* Without this option, less attempts to guess at the output unit when it does maths. */ + strictUnits: false, - /* Effectively the declaration is put at the top of your base Less file, + /* Effectively the declaration is put at the top of your base Less file, * meaning it can be used but it also can be overridden if this variable * is defined in the file. */ - globalVars: null, + globalVars: null, - /* As opposed to the global variable option, this puts the declaration at the + /* As opposed to the global variable option, this puts the declaration at the * end of your base file, meaning it will override anything defined in your Less file. */ - modifyVars: null, + modifyVars: null, - /* This option allows you to specify a argument to go on to every URL. */ - urlArgs: '' + /* This option allows you to specify a argument to go on to every URL. */ + urlArgs: '' }); \ No newline at end of file diff --git a/lib/less/environment/abstract-file-manager.js b/lib/less/environment/abstract-file-manager.js index e6a795bc0..937bb931a 100644 --- a/lib/less/environment/abstract-file-manager.js +++ b/lib/less/environment/abstract-file-manager.js @@ -1,125 +1,127 @@ -const abstractFileManager = () => { -}; - -abstractFileManager.prototype.getPath = filename => { - let j = filename.lastIndexOf('?'); - if (j > 0) { - filename = filename.slice(0, j); - } - j = filename.lastIndexOf('/'); - if (j < 0) { - j = filename.lastIndexOf('\\'); - } - if (j < 0) { - return ''; +class AbstractFileManager { + getPath(filename) { + let j = filename.lastIndexOf('?'); + if (j > 0) { + filename = filename.slice(0, j); + } + j = filename.lastIndexOf('/'); + if (j < 0) { + j = filename.lastIndexOf('\\'); + } + if (j < 0) { + return ''; + } + return filename.slice(0, j + 1); } - return filename.slice(0, j + 1); -}; -abstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + tryAppendExtension(path, ext) { + return /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + } -abstractFileManager.prototype.tryAppendLessExtension = function(path) { - return this.tryAppendExtension(path, '.less'); -}; + tryAppendLessExtension(path) { + return this.tryAppendExtension(path, '.less'); + }; -abstractFileManager.prototype.supportsSync = () => false; + supportsSync() { return false; } -abstractFileManager.prototype.alwaysMakePathsAbsolute = () => false; + alwaysMakePathsAbsolute() { return false; } -abstractFileManager.prototype.isPathAbsolute = filename => (/^(?:[a-z-]+:|\/|\\|#)/i).test(filename); -// TODO: pull out / replace? -abstractFileManager.prototype.join = (basePath, laterPath) => { - if (!basePath) { - return laterPath; - } - return basePath + laterPath; -}; - -abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { - // diff between two paths to create a relative path - - const urlParts = this.extractUrlParts(url); - - const baseUrlParts = this.extractUrlParts(baseUrl); - let i; - let max; - let urlDirectories; - let baseUrlDirectories; - let diff = ''; - if (urlParts.hostPart !== baseUrlParts.hostPart) { - return ''; - } - max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); - for (i = 0; i < max; i++) { - if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; } - } - baseUrlDirectories = baseUrlParts.directories.slice(i); - urlDirectories = urlParts.directories.slice(i); - for (i = 0; i < baseUrlDirectories.length - 1; i++) { - diff += '../'; - } - for (i = 0; i < urlDirectories.length - 1; i++) { - diff += `${urlDirectories[i]}/`; - } - return diff; -}; -// helper function, not part of API -abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) { - // urlParts[1] = protocol://hostname/ OR / - // urlParts[2] = / if path relative to host base - // urlParts[3] = directories - // urlParts[4] = filename - // urlParts[5] = parameters - - const urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; - - const urlParts = url.match(urlPartsRegex); - const returner = {}; - let rawDirectories = []; - const directories = []; - let i; - let baseUrlParts; - - if (!urlParts) { - throw new Error(`Could not parse sheet href - '${url}'`); + isPathAbsolute(filename) { + return (/^(?:[a-z-]+:|\/|\\|#)/i).test(filename); } - - // Stylesheets in IE don't always return the full path - if (baseUrl && (!urlParts[1] || urlParts[2])) { - baseUrlParts = baseUrl.match(urlPartsRegex); - if (!baseUrlParts) { - throw new Error(`Could not parse page url - '${baseUrl}'`); + // TODO: pull out / replace? + join(basePath, laterPath) { + if (!basePath) { + return laterPath; } - urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; - if (!urlParts[2]) { - urlParts[3] = baseUrlParts[3] + urlParts[3]; + return basePath + laterPath; + }; + + pathDiff(url, baseUrl) { + // diff between two paths to create a relative path + const urlParts = this.extractUrlParts(url); + const baseUrlParts = this.extractUrlParts(baseUrl); + + let i; + let max; + let urlDirectories; + let baseUrlDirectories; + let diff = ''; + if (urlParts.hostPart !== baseUrlParts.hostPart) { + return ''; + } + max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); + for (i = 0; i < max; i++) { + if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; } + } + baseUrlDirectories = baseUrlParts.directories.slice(i); + urlDirectories = urlParts.directories.slice(i); + for (i = 0; i < baseUrlDirectories.length - 1; i++) { + diff += '../'; + } + for (i = 0; i < urlDirectories.length - 1; i++) { + diff += `${urlDirectories[i]}/`; + } + return diff; + }; + // helper function, not part of API + extractUrlParts(url, baseUrl) { + // urlParts[1] = protocol://hostname/ OR / + // urlParts[2] = / if path relative to host base + // urlParts[3] = directories + // urlParts[4] = filename + // urlParts[5] = parameters + + const urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; + + const urlParts = url.match(urlPartsRegex); + const returner = {}; + let rawDirectories = []; + const directories = []; + let i; + let baseUrlParts; + + if (!urlParts) { + throw new Error(`Could not parse sheet href - '${url}'`); } - } - if (urlParts[3]) { - rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); + // Stylesheets in IE don't always return the full path + if (baseUrl && (!urlParts[1] || urlParts[2])) { + baseUrlParts = baseUrl.match(urlPartsRegex); + if (!baseUrlParts) { + throw new Error(`Could not parse page url - '${baseUrl}'`); + } + urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; + if (!urlParts[2]) { + urlParts[3] = baseUrlParts[3] + urlParts[3]; + } + } - // collapse '..' and skip '.' - for (i = 0; i < rawDirectories.length; i++) { + if (urlParts[3]) { + rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); - if (rawDirectories[i] === '..') { - directories.pop(); - } - else if (rawDirectories[i] !== '.') { - directories.push(rawDirectories[i]); + // collapse '..' and skip '.' + for (i = 0; i < rawDirectories.length; i++) { + + if (rawDirectories[i] === '..') { + directories.pop(); + } + else if (rawDirectories[i] !== '.') { + directories.push(rawDirectories[i]); + } + } - } - } - returner.hostPart = urlParts[1]; - returner.directories = directories; - returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); - returner.path = (urlParts[1] || '') + directories.join('/'); - returner.filename = urlParts[4]; - returner.fileUrl = returner.path + (urlParts[4] || ''); - returner.url = returner.fileUrl + (urlParts[5] || ''); - return returner; -}; - -export default abstractFileManager; + returner.hostPart = urlParts[1]; + returner.directories = directories; + returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); + returner.path = (urlParts[1] || '') + directories.join('/'); + returner.filename = urlParts[4]; + returner.fileUrl = returner.path + (urlParts[4] || ''); + returner.url = returner.fileUrl + (urlParts[5] || ''); + return returner; + }; +} + +export default AbstractFileManager; diff --git a/lib/less/functions/color-blending.js b/lib/less/functions/color-blending.js index ee38d061c..9f01626d2 100644 --- a/lib/less/functions/color-blending.js +++ b/lib/less/functions/color-blending.js @@ -7,12 +7,12 @@ function colorBlend(mode, color1, color2) { const ab = color1.alpha; // result let // backdrop - cb; + cb; const as = color2.alpha; let // source - cs; + cs; let ar; let cr; diff --git a/lib/less/functions/default.js b/lib/less/functions/default.js index e5c36d707..fc7fd63aa 100644 --- a/lib/less/functions/default.js +++ b/lib/less/functions/default.js @@ -22,4 +22,4 @@ const defaultFunc = { } }; -export default { 'default': defaultFunc.eval.bind(defaultFunc) }; +export default defaultFunc; diff --git a/lib/less/functions/function-caller.js b/lib/less/functions/function-caller.js index 5314d6570..76b4c413c 100644 --- a/lib/less/functions/function-caller.js +++ b/lib/less/functions/function-caller.js @@ -24,22 +24,22 @@ class functionCaller { } return true; }) - .map(item => { - if (item.type === 'Expression') { - const subNodes = item.value.filter(item => { - if (item.type === 'Comment') { - return false; + .map(item => { + if (item.type === 'Expression') { + const subNodes = item.value.filter(item => { + if (item.type === 'Comment') { + return false; + } + return true; + }); + if (subNodes.length === 1) { + return subNodes[0]; + } else { + return new Expression(subNodes); } - return true; - }); - if (subNodes.length === 1) { - return subNodes[0]; - } else { - return new Expression(subNodes); } - } - return item; - }); + return item; + }); } return this.func(...args); diff --git a/lib/less/functions/index.js b/lib/less/functions/index.js index eaaafdb08..046da784c 100644 --- a/lib/less/functions/index.js +++ b/lib/less/functions/index.js @@ -18,7 +18,7 @@ export default environment => { // register functions functionRegistry.addMultiple(boolean); - functionRegistry.addMultiple(defaultFunc); + functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc)); functionRegistry.addMultiple(color); functionRegistry.addMultiple(colorBlending); functionRegistry.addMultiple(dataUri(environment)); diff --git a/lib/less/functions/list.js b/lib/less/functions/list.js index 56435c5e0..da57b16e7 100644 --- a/lib/less/functions/list.js +++ b/lib/less/functions/list.js @@ -134,9 +134,9 @@ export default { } return new Ruleset([ new(Selector)([ new Element("", '&') ]) ], - rules, - rs.strictImports, - rs.visibilityInfo() - ).eval(this.context); + rules, + rs.strictImports, + rs.visibilityInfo() + ).eval(this.context); } }; diff --git a/lib/less/functions/number.js b/lib/less/functions/number.js index 54c9944fc..2575c9288 100644 --- a/lib/less/functions/number.js +++ b/lib/less/functions/number.js @@ -17,7 +17,7 @@ const minMax = function (isMin, args) { let unitClone; const // elems only contains original argument values. - order = []; + order = []; const values = {}; // value is the index into the order array. diff --git a/lib/less/index.js b/lib/less/index.js index 3ad126c1e..9b2eec38e 100644 --- a/lib/less/index.js +++ b/lib/less/index.js @@ -20,15 +20,27 @@ import PluginManager from './plugin-manager'; import logger from './logger'; export default (environment, fileManagers) => { + /** + * @todo + * This original code could be improved quite a bit. + * Many classes / modules currently add side-effects / mutations to passed in objects, + * which makes it hard to refactor and reason about. + */ + environment = new Environment(environment, fileManagers); + const SourceMapOutput = sourceMapOutput(environment); const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment); const ParseTree = parseTree(SourceMapBuilder); const ImportManager = importManager(environment); const render = Render(environment, ParseTree, ImportManager); const parse = Parse(environment, ParseTree, ImportManager); - const environ = new Environment(environment, fileManagers); const functions = Functions(environment); + /** + * @todo + * This root properties / methods need to be organized. + * It's not clear what should / must be public and why. + */ const initial = { version: [3, 9, 0], data, @@ -36,7 +48,7 @@ export default (environment, fileManagers) => { Environment, AbstractFileManager, AbstractPluginLoader, - environment: environ, + environment, visitors, Parser, functions, @@ -55,12 +67,10 @@ export default (environment, fileManagers) => { }; // Create a public API + const ctor = t => function (...args) { + return new t(...args); + }; - const ctor = t => (function(...args) { - const obj = Object.create(t.prototype); - t.apply(obj, Array.prototype.slice.call(args, 0)); - return obj; - }); let t; const api = Object.create(initial); for (const n in initial.tree) { diff --git a/lib/less/parse-tree.js b/lib/less/parse-tree.js index ab9108b06..462de6fd5 100644 --- a/lib/less/parse-tree.js +++ b/lib/less/parse-tree.js @@ -22,7 +22,8 @@ export default SourceMapBuilder => { try { const compress = Boolean(options.compress); if (compress) { - logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); + logger.warn('The compress option has been deprecated. ' + + 'We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); } const toCSSOptions = { diff --git a/lib/less/parser/parser-input.js b/lib/less/parser/parser-input.js index a284b81b8..8e93a38a7 100644 --- a/lib/less/parser/parser-input.js +++ b/lib/less/parser/parser-input.js @@ -2,28 +2,28 @@ import chunker from './chunker'; export default () => { let // Less input string - input; + input; let // current chunk - j; + j; const // holds state for backtracking - saveStack = []; + saveStack = []; let // furthest index the parser has gone to - furthest; + furthest; let // if this is furthest we got to, this is the probably cause - furthestPossibleErrorMessage; + furthestPossibleErrorMessage; let // chunkified input - chunks; + chunks; let // current chunk - current; + current; let // index of current chunk, in `input` - currentPos; + currentPos; const parserInput = {}; const CHARCODE_SPACE = 32; diff --git a/lib/less/parser/parser.js b/lib/less/parser/parser.js index b658294b2..44e194805 100644 --- a/lib/less/parser/parser.js +++ b/lib/less/parser/parser.js @@ -470,7 +470,7 @@ const Parser = function Parser(context, imports, fileInfo) { return { parse, // parsing function stop // when true - stop after parse() and return its result, - // otherwise continue for plain args + // otherwise continue for plain args }; } @@ -1546,7 +1546,7 @@ const Parser = function Parser(context, imports, fileInfo) { if (value) { parserInput.forget(); // anonymous values absorb the end ';' which is required for them to work - return new (tree.Declaration)(name, value, false, merge, index, fileInfo); + return new(tree.Declaration)(name, value, false, merge, index, fileInfo); } if (!value) { @@ -1563,7 +1563,7 @@ const Parser = function Parser(context, imports, fileInfo) { if (value && (this.end() || hasDR)) { parserInput.forget(); - return new (tree.Declaration)(name, value, important, merge, index, fileInfo); + return new(tree.Declaration)(name, value, important, merge, index, fileInfo); } else { parserInput.restore(); @@ -1984,7 +1984,7 @@ const Parser = function Parser(context, imports, fileInfo) { if (rules || (!hasBlock && value && parserInput.$char(';'))) { parserInput.forget(); - return new (tree.AtRule)(name, value, rules, index, fileInfo, + return new(tree.AtRule)(name, value, rules, index, fileInfo, context.dumpLineNumbers ? getDebugInfo(index) : null, isRooted ); diff --git a/lib/less/plugin-manager.js b/lib/less/plugin-manager.js index 486115378..977b1c5ee 100644 --- a/lib/less/plugin-manager.js +++ b/lib/less/plugin-manager.js @@ -157,12 +157,12 @@ class PluginManager { let pm; -const PluginManagerFactory = (less, newFactory) => { - if (newFactory || !pm) { - pm = new PluginManager(less); - } - return pm; - }; +function PluginManagerFactory(less, newFactory) { + if (newFactory || !pm) { + pm = new PluginManager(less); + } + return pm; +}; // export default PluginManagerFactory; diff --git a/lib/less/transform-tree.js b/lib/less/transform-tree.js index e19baddd5..79eee5064 100644 --- a/lib/less/transform-tree.js +++ b/lib/less/transform-tree.js @@ -36,11 +36,11 @@ export default (root, options = {}) => { } const visitors = [ - new visitor.JoinSelectorVisitor(), - new visitor.MarkVisibleSelectorsVisitor(true), - new visitor.ExtendVisitor(), - new visitor.ToCSSVisitor({compress: Boolean(options.compress)}) - ]; + new visitor.JoinSelectorVisitor(), + new visitor.MarkVisibleSelectorsVisitor(true), + new visitor.ExtendVisitor(), + new visitor.ToCSSVisitor({compress: Boolean(options.compress)}) + ]; const preEvalVisitors = []; let v; diff --git a/lib/less/tree/anonymous.js b/lib/less/tree/anonymous.js index 8f15a2948..92bad4942 100644 --- a/lib/less/tree/anonymous.js +++ b/lib/less/tree/anonymous.js @@ -2,6 +2,8 @@ import Node from './node'; class Anonymous extends Node { constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) { + super(); + this.value = value; this._index = index; this._fileInfo = currentFileInfo; diff --git a/lib/less/tree/assignment.js b/lib/less/tree/assignment.js index e96774bec..0776f43a0 100644 --- a/lib/less/tree/assignment.js +++ b/lib/less/tree/assignment.js @@ -2,6 +2,8 @@ import Node from './node'; class Assignment extends Node { constructor(key, val) { + super(); + this.key = key; this.value = val; } diff --git a/lib/less/tree/atrule.js b/lib/less/tree/atrule.js index 5cbd93ede..350a6f62a 100644 --- a/lib/less/tree/atrule.js +++ b/lib/less/tree/atrule.js @@ -14,6 +14,8 @@ class AtRule extends Node { isRooted, visibilityInfo ) { + super(); + let i; this.name = name; diff --git a/lib/less/tree/attribute.js b/lib/less/tree/attribute.js index 9a0ed5d3a..214803b2b 100644 --- a/lib/less/tree/attribute.js +++ b/lib/less/tree/attribute.js @@ -2,6 +2,8 @@ import Node from './node'; class Attribute extends Node { constructor(key, op, value) { + super(); + this.key = key; this.op = op; this.value = value; diff --git a/lib/less/tree/call.js b/lib/less/tree/call.js index 67065967f..eb9b161d1 100644 --- a/lib/less/tree/call.js +++ b/lib/less/tree/call.js @@ -7,6 +7,8 @@ import FunctionCaller from '../functions/function-caller'; // class Call extends Node { constructor(name, args, index, currentFileInfo) { + super(); + this.name = name; this.args = args; this.calc = name === 'calc'; diff --git a/lib/less/tree/color.js b/lib/less/tree/color.js index 057a228cf..f945def20 100644 --- a/lib/less/tree/color.js +++ b/lib/less/tree/color.js @@ -6,6 +6,8 @@ import colors from '../data/colors'; // class Color extends Node { constructor(rgb, a, originalForm) { + super(); + const self = this; // // The end goal here, is to parse the arguments @@ -221,9 +223,9 @@ function clamp(v, max) { function toHex(v) { return `#${v.map(c => { - c = clamp(Math.round(c), 255); - return (c < 16 ? '0' : '') + c.toString(16); -}).join('')}`; + c = clamp(Math.round(c), 255); + return (c < 16 ? '0' : '') + c.toString(16); + }).join('')}`; } Color.fromKeyword = keyword => { diff --git a/lib/less/tree/combinator.js b/lib/less/tree/combinator.js index 6258b158e..3740a3b5d 100644 --- a/lib/less/tree/combinator.js +++ b/lib/less/tree/combinator.js @@ -1,7 +1,14 @@ import Node from './node'; +const _noSpaceCombinators = { + '': true, + ' ': true, + '|': true +}; class Combinator extends Node { constructor(value) { + super(); + if (value === ' ') { this.value = ' '; this.emptyOrWhitespace = true; @@ -18,9 +25,5 @@ class Combinator extends Node { } Combinator.prototype.type = 'Combinator'; -const _noSpaceCombinators = { - '': true, - ' ': true, - '|': true -}; + export default Combinator; diff --git a/lib/less/tree/comment.js b/lib/less/tree/comment.js index ae4062803..8ed53c97c 100644 --- a/lib/less/tree/comment.js +++ b/lib/less/tree/comment.js @@ -3,6 +3,8 @@ import getDebugInfo from './debug-info'; class Comment extends Node { constructor(value, isLineComment, index, currentFileInfo) { + super(); + this.value = value; this.isLineComment = isLineComment; this._index = index; diff --git a/lib/less/tree/condition.js b/lib/less/tree/condition.js index b2514b232..857624baa 100644 --- a/lib/less/tree/condition.js +++ b/lib/less/tree/condition.js @@ -2,6 +2,8 @@ import Node from './node'; class Condition extends Node { constructor(op, l, r, i, negate) { + super(); + this.op = op.trim(); this.lvalue = l; this.rvalue = r; diff --git a/lib/less/tree/debug-info.js b/lib/less/tree/debug-info.js index 1b8698a1e..096386d11 100644 --- a/lib/less/tree/debug-info.js +++ b/lib/less/tree/debug-info.js @@ -24,11 +24,11 @@ debugInfo.asMediaQuery = ctx => { filenameWithProtocol = `file://${filenameWithProtocol}`; } return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\/\\])/g, a => { - if (a == '\\') { - a = '\/'; - } - return `\\${a}`; -})}}line{font-family:\\00003${ctx.debugInfo.lineNumber}}}\n`; + if (a == '\\') { + a = '\/'; + } + return `\\${a}`; + })}}line{font-family:\\00003${ctx.debugInfo.lineNumber}}}\n`; }; export default debugInfo; diff --git a/lib/less/tree/declaration.js b/lib/less/tree/declaration.js index 8559a46c8..74834e0fe 100644 --- a/lib/less/tree/declaration.js +++ b/lib/less/tree/declaration.js @@ -8,6 +8,8 @@ const MATH = Constants.Math; class Declaration extends Node { constructor(name, value, important, merge, index, currentFileInfo, inline, variable) { + super(); + this.name = name; this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]); this.important = important ? ` ${important.trim()}` : ''; @@ -44,7 +46,7 @@ class Declaration extends Node { // expand 'primitive' name directly to get // things faster (~10% for benchmark.less): name = (name.length === 1) && (name[0] instanceof Keyword) ? - name[0].value : evalName(context, name); + name[0].value : evalName(context, name); variable = false; // never treat expanded interpolation as new variable name } @@ -69,11 +71,11 @@ class Declaration extends Node { } return new Declaration(name, - evaldValue, - important, - this.merge, - this.getIndex(), this.fileInfo(), this.inline, - variable); + evaldValue, + important, + this.merge, + this.getIndex(), this.fileInfo(), this.inline, + variable); } catch (e) { if (typeof e.index !== 'number') { @@ -91,10 +93,10 @@ class Declaration extends Node { makeImportant() { return new Declaration(this.name, - this.value, - '!important', - this.merge, - this.getIndex(), this.fileInfo(), this.inline); + this.value, + '!important', + this.merge, + this.getIndex(), this.fileInfo(), this.inline); } } diff --git a/lib/less/tree/detached-ruleset.js b/lib/less/tree/detached-ruleset.js index 231eb87da..9448e1366 100644 --- a/lib/less/tree/detached-ruleset.js +++ b/lib/less/tree/detached-ruleset.js @@ -4,6 +4,8 @@ import * as utils from '../utils'; class DetachedRuleset extends Node { constructor(ruleset, frames) { + super(); + this.ruleset = ruleset; this.frames = frames; this.setParent(this.ruleset, this); diff --git a/lib/less/tree/dimension.js b/lib/less/tree/dimension.js index ad680dd5e..314a6b936 100644 --- a/lib/less/tree/dimension.js +++ b/lib/less/tree/dimension.js @@ -8,12 +8,14 @@ import Color from './color'; // class Dimension extends Node { constructor(value, unit) { + super(); + this.value = parseFloat(value); if (isNaN(this.value)) { throw new Error('Dimension is not a number.'); } this.unit = (unit && unit instanceof Unit) ? unit : - new Unit(unit ? [unit] : undefined); + new Unit(unit ? [unit] : undefined); this.setParent(this.unit, this); } @@ -80,7 +82,8 @@ class Dimension extends Node { other = other.convertTo(this.unit.usedUnits()); if (context.strictUnits && other.unit.toString() !== unit.toString()) { - throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`); + throw new Error(`Incompatible units. Change the units or use the unit function. ` + + `Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`); } value = this._operate(context, op, this.value, other.value); diff --git a/lib/less/tree/element.js b/lib/less/tree/element.js index 8bd79a327..b96d2da21 100644 --- a/lib/less/tree/element.js +++ b/lib/less/tree/element.js @@ -4,8 +4,10 @@ import Combinator from './combinator'; class Element extends Node { constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) { + super(); + this.combinator = combinator instanceof Combinator ? - combinator : new Combinator(combinator); + combinator : new Combinator(combinator); if (typeof value === 'string') { this.value = value.trim(); @@ -31,10 +33,10 @@ class Element extends Node { eval(context) { return new Element(this.combinator, - this.value.eval ? this.value.eval(context) : this.value, - this.isVariable, - this.getIndex(), - this.fileInfo(), this.visibilityInfo()); + this.value.eval ? this.value.eval(context) : this.value, + this.isVariable, + this.getIndex(), + this.fileInfo(), this.visibilityInfo()); } clone() { diff --git a/lib/less/tree/expression.js b/lib/less/tree/expression.js index f554dc049..d1be1a9ac 100644 --- a/lib/less/tree/expression.js +++ b/lib/less/tree/expression.js @@ -7,6 +7,8 @@ const MATH = Constants.Math; class Expression extends Node { constructor(value, noSpacing) { + super(); + this.value = value; this.noSpacing = noSpacing; if (!value) { diff --git a/lib/less/tree/extend.js b/lib/less/tree/extend.js index 58e7cfd3f..d78bf92ca 100644 --- a/lib/less/tree/extend.js +++ b/lib/less/tree/extend.js @@ -3,6 +3,8 @@ import Selector from './selector'; class Extend extends Node { constructor(selector, option, index, currentFileInfo, visibilityInfo) { + super(); + this.selector = selector; this.option = option; this.object_id = Extend.next_id++; diff --git a/lib/less/tree/import.js b/lib/less/tree/import.js index 9d6d5f2cd..394cde102 100644 --- a/lib/less/tree/import.js +++ b/lib/less/tree/import.js @@ -21,6 +21,8 @@ import LessError from '../less-error'; // class Import extends Node { constructor(path, features, options, index, currentFileInfo, visibilityInfo) { + super(); + this.options = options; this._index = index; this._fileInfo = currentFileInfo; diff --git a/lib/less/tree/javascript.js b/lib/less/tree/javascript.js index 0d63358ee..f4e373328 100644 --- a/lib/less/tree/javascript.js +++ b/lib/less/tree/javascript.js @@ -5,6 +5,8 @@ import Anonymous from './anonymous'; class JavaScript extends JsEvalNode { constructor(string, escaped, index, currentFileInfo) { + super(); + this.escaped = escaped; this.expression = string; this._index = index; diff --git a/lib/less/tree/js-eval-node.js b/lib/less/tree/js-eval-node.js index 8e56a649a..5fbb018c1 100644 --- a/lib/less/tree/js-eval-node.js +++ b/lib/less/tree/js-eval-node.js @@ -1,59 +1,58 @@ import Node from './node'; import Variable from './variable'; -const JsEvalNode = () => { -}; -JsEvalNode.prototype = new Node(); - -JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { - let result; - const that = this; - const evalContext = {}; - - if (!context.javascriptEnabled) { - throw { message: 'Inline JavaScript is not enabled. Is it set in your options?', - filename: this.fileInfo().filename, - index: this.getIndex() }; - } +class JsEvalNode extends Node { + evaluateJavaScript(expression, context) { + let result; + const that = this; + const evalContext = {}; + + if (!context.javascriptEnabled) { + throw { message: 'Inline JavaScript is not enabled. Is it set in your options?', + filename: this.fileInfo().filename, + index: this.getIndex() }; + } - expression = expression.replace(/@\{([\w-]+)\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context))); + expression = expression.replace(/@\{([\w-]+)\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context))); - try { - expression = new Function(`return (${expression})`); - } catch (e) { - throw { message: `JavaScript evaluation error: ${e.message} from \`${expression}\`` , - filename: this.fileInfo().filename, - index: this.getIndex() }; - } + try { + expression = new Function(`return (${expression})`); + } catch (e) { + throw { message: `JavaScript evaluation error: ${e.message} from \`${expression}\`` , + filename: this.fileInfo().filename, + index: this.getIndex() }; + } - const variables = context.frames[0].variables(); - for (const k in variables) { - if (variables.hasOwnProperty(k)) { - /* jshint loopfunc:true */ - evalContext[k.slice(1)] = { - value: variables[k].value, - toJS: function () { - return this.value.eval(context).toCSS(); - } - }; + const variables = context.frames[0].variables(); + for (const k in variables) { + if (variables.hasOwnProperty(k)) { + /* jshint loopfunc:true */ + evalContext[k.slice(1)] = { + value: variables[k].value, + toJS: function () { + return this.value.eval(context).toCSS(); + } + }; + } } - } - try { - result = expression.call(evalContext); - } catch (e) { - throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/["]/g, '\'')}'` , - filename: this.fileInfo().filename, - index: this.getIndex() }; + try { + result = expression.call(evalContext); + } catch (e) { + throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/["]/g, '\'')}'` , + filename: this.fileInfo().filename, + index: this.getIndex() }; + } + return result; } - return result; -}; -JsEvalNode.prototype.jsify = obj => { - if (Array.isArray(obj.value) && (obj.value.length > 1)) { - return `[${obj.value.map(v => v.toCSS()).join(', ')}]`; - } else { - return obj.toCSS(); + + jsify(obj) { + if (Array.isArray(obj.value) && (obj.value.length > 1)) { + return `[${obj.value.map(v => v.toCSS()).join(', ')}]`; + } else { + return obj.toCSS(); + } } -}; +} export default JsEvalNode; diff --git a/lib/less/tree/keyword.js b/lib/less/tree/keyword.js index 1b5bc4efd..20199f587 100644 --- a/lib/less/tree/keyword.js +++ b/lib/less/tree/keyword.js @@ -1,7 +1,11 @@ import Node from './node'; class Keyword extends Node { - constructor(value) { this.value = value; } + constructor(value) { + super(); + + this.value = value; + } genCSS(context, output) { if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; } diff --git a/lib/less/tree/media.js b/lib/less/tree/media.js index 5bc73575c..684537208 100644 --- a/lib/less/tree/media.js +++ b/lib/less/tree/media.js @@ -8,6 +8,8 @@ import * as utils from '../utils'; class Media extends AtRule { constructor(value, features, index, currentFileInfo, visibilityInfo) { + super(); + this._index = index; this._fileInfo = currentFileInfo; @@ -67,7 +69,7 @@ class Media extends AtRule { context.mediaPath.pop(); return context.mediaPath.length === 0 ? media.evalTop(context) : - media.evalNested(context); + media.evalNested(context); } evalTop(context) { @@ -96,7 +98,7 @@ class Media extends AtRule { // Extract the media-query conditions separated with `,` (OR). for (i = 0; i < path.length; i++) { value = path[i].features instanceof Value ? - path[i].features.value : path[i].features; + path[i].features.value : path[i].features; path[i] = Array.isArray(value) ? value : [value]; } diff --git a/lib/less/tree/mixin-call.js b/lib/less/tree/mixin-call.js index 986b63e67..ec63968da 100644 --- a/lib/less/tree/mixin-call.js +++ b/lib/less/tree/mixin-call.js @@ -5,6 +5,8 @@ import defaultFunc from '../functions/default'; class MixinCall extends Node { constructor(elements, args, index, currentFileInfo, important) { + super(); + this.selector = new Selector(elements); this.arguments = args || []; this._index = index; @@ -195,17 +197,17 @@ class MixinCall extends Node { format(args) { return `${this.selector.toCSS().trim()}(${args ? args.map(a => { - let argValue = ''; - if (a.name) { - argValue += `${a.name}:`; - } - if (a.value.toCSS) { - argValue += a.value.toCSS(); - } else { - argValue += '???'; - } - return argValue; - }).join(', ') : ''})`; + let argValue = ''; + if (a.name) { + argValue += `${a.name}:`; + } + if (a.value.toCSS) { + argValue += a.value.toCSS(); + } else { + argValue += '???'; + } + return argValue; + }).join(', ') : ''})`; } } diff --git a/lib/less/tree/mixin-definition.js b/lib/less/tree/mixin-definition.js index 6deb52b88..0feb8e577 100644 --- a/lib/less/tree/mixin-definition.js +++ b/lib/less/tree/mixin-definition.js @@ -9,6 +9,8 @@ import * as utils from '../utils'; class Definition extends Ruleset { constructor(name, params, rules, condition, variadic, frames, visibilityInfo) { + super(); + this.name = name || 'anonymous mixin'; this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])]; this.params = params; @@ -176,8 +178,8 @@ class Definition extends Ruleset { new contexts.Eval(context, [this.evalParams(context, /* the parameter variables */ new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])] - .concat(this.frames || []) // the parent namespace/mixin frames - .concat(context.frames)))) { // the current environment frames + .concat(this.frames || []) // the parent namespace/mixin frames + .concat(context.frames)))) { // the current environment frames return false; } return true; diff --git a/lib/less/tree/namespace-value.js b/lib/less/tree/namespace-value.js index cbe986fdf..b1425e846 100644 --- a/lib/less/tree/namespace-value.js +++ b/lib/less/tree/namespace-value.js @@ -5,6 +5,8 @@ import Selector from './selector'; class NamespaceValue extends Node { constructor(ruleCall, lookups, important, index, fileInfo) { + super(); + this.value = ruleCall; this.lookups = lookups; this.important = important; diff --git a/lib/less/tree/negative.js b/lib/less/tree/negative.js index ae0f199b4..2e24c0e48 100644 --- a/lib/less/tree/negative.js +++ b/lib/less/tree/negative.js @@ -4,6 +4,8 @@ import Dimension from './dimension'; class Negative extends Node { constructor(node) { + super(); + this.value = node; } diff --git a/lib/less/tree/node.js b/lib/less/tree/node.js index 90aa51a93..39d4ec018 100644 --- a/lib/less/tree/node.js +++ b/lib/less/tree/node.js @@ -174,5 +174,5 @@ Node.compare = (a, b) => { Node.numericCompare = (a, b) => a < b ? -1 : a === b ? 0 - : a > b ? 1 : undefined; + : a > b ? 1 : undefined; export default Node; diff --git a/lib/less/tree/operation.js b/lib/less/tree/operation.js index 019b847db..46a8cf1de 100644 --- a/lib/less/tree/operation.js +++ b/lib/less/tree/operation.js @@ -7,6 +7,8 @@ const MATH = Constants.Math; class Operation extends Node { constructor(op, operands, isSpaced) { + super(); + this.op = op.trim(); this.operands = operands; this.isSpaced = isSpaced; diff --git a/lib/less/tree/paren.js b/lib/less/tree/paren.js index 915565af2..9fd712477 100644 --- a/lib/less/tree/paren.js +++ b/lib/less/tree/paren.js @@ -2,6 +2,8 @@ import Node from './node'; class Paren extends Node { constructor(node) { + super(); + this.value = node; } diff --git a/lib/less/tree/property.js b/lib/less/tree/property.js index 9641355bc..2deca3349 100644 --- a/lib/less/tree/property.js +++ b/lib/less/tree/property.js @@ -3,6 +3,8 @@ import Declaration from './declaration'; class Property extends Node { constructor(name, index, currentFileInfo) { + super(); + this.name = name; this._index = index; this._fileInfo = currentFileInfo; diff --git a/lib/less/tree/quoted.js b/lib/less/tree/quoted.js index e28f37640..f3b26e448 100644 --- a/lib/less/tree/quoted.js +++ b/lib/less/tree/quoted.js @@ -4,6 +4,8 @@ import Property from './property'; class Quoted extends Node { constructor(str, content, escaped, index, currentFileInfo) { + super(); + this.escaped = (escaped == null) ? true : escaped; this.value = content || ''; this.quote = str.charAt(0); diff --git a/lib/less/tree/ruleset.js b/lib/less/tree/ruleset.js index 4cf33a502..a746dbc6e 100644 --- a/lib/less/tree/ruleset.js +++ b/lib/less/tree/ruleset.js @@ -14,6 +14,8 @@ import * as utils from '../utils'; class Ruleset extends Node { constructor(selectors, rules, strictImports, visibilityInfo) { + super(); + this.selectors = selectors; this.rules = rules; this._lookups = {}; @@ -458,7 +460,7 @@ class Ruleset extends Node { let ruleNodes = []; let // Line number debugging - debugInfo; + debugInfo; let rule; let path; diff --git a/lib/less/tree/selector.js b/lib/less/tree/selector.js index 163205607..2d5be797c 100644 --- a/lib/less/tree/selector.js +++ b/lib/less/tree/selector.js @@ -4,6 +4,8 @@ import LessError from '../less-error'; class Selector extends Node { constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) { + super(); + this.extendList = extendList; this.condition = condition; this.evaldCondition = !condition; diff --git a/lib/less/tree/unicode-descriptor.js b/lib/less/tree/unicode-descriptor.js index 07c0a9596..662dae574 100644 --- a/lib/less/tree/unicode-descriptor.js +++ b/lib/less/tree/unicode-descriptor.js @@ -2,6 +2,8 @@ import Node from './node'; class UnicodeDescriptor extends Node { constructor(value) { + super(); + this.value = value; } } diff --git a/lib/less/tree/unit.js b/lib/less/tree/unit.js index 334a8d68c..d76b47722 100644 --- a/lib/less/tree/unit.js +++ b/lib/less/tree/unit.js @@ -4,6 +4,8 @@ import * as utils from '../utils'; class Unit extends Node { constructor(numerator, denominator, backupUnit) { + super(); + this.numerator = numerator ? utils.copyArray(numerator).sort() : []; this.denominator = denominator ? utils.copyArray(denominator).sort() : []; if (backupUnit) { diff --git a/lib/less/tree/url.js b/lib/less/tree/url.js index ddae3a4ba..4c1acdc16 100644 --- a/lib/less/tree/url.js +++ b/lib/less/tree/url.js @@ -2,6 +2,8 @@ import Node from './node'; class URL extends Node { constructor(val, index, currentFileInfo, isEvald) { + super(); + this.value = val; this._index = index; this._fileInfo = currentFileInfo; diff --git a/lib/less/tree/value.js b/lib/less/tree/value.js index 3b86a6873..c21d0b294 100644 --- a/lib/less/tree/value.js +++ b/lib/less/tree/value.js @@ -2,6 +2,8 @@ import Node from './node'; class Value extends Node { constructor(value) { + super(); + if (!value) { throw new Error('Value requires an array argument'); } diff --git a/lib/less/tree/variable-call.js b/lib/less/tree/variable-call.js index a8ad7d374..c246d7d13 100644 --- a/lib/less/tree/variable-call.js +++ b/lib/less/tree/variable-call.js @@ -6,6 +6,8 @@ import LessError from '../less-error'; class VariableCall extends Node { constructor(variable, index, currentFileInfo) { + super(); + this.variable = variable; this._index = index; this._fileInfo = currentFileInfo; @@ -32,6 +34,7 @@ class VariableCall extends Node { } detachedRuleset = new DetachedRuleset(rules); } + if (detachedRuleset.ruleset) { return detachedRuleset.callEval(context); } diff --git a/lib/less/tree/variable.js b/lib/less/tree/variable.js index fdf13ad86..1c7e5f0c7 100644 --- a/lib/less/tree/variable.js +++ b/lib/less/tree/variable.js @@ -3,6 +3,8 @@ import Call from './call'; class Variable extends Node { constructor(name, index, currentFileInfo) { + super(); + this.name = name; this._index = index; this._fileInfo = currentFileInfo; diff --git a/lib/less/utils.js b/lib/less/utils.js index 9a1541d8e..54f776962 100644 --- a/lib/less/utils.js +++ b/lib/less/utils.js @@ -20,6 +20,7 @@ export function getLocation(index, inputStream) { column }; } + export function copyArray(arr) { let i; const length = arr.length; @@ -30,6 +31,7 @@ export function copyArray(arr) { } return copy; } + export function clone(obj) { const cloned = {}; for (const prop in obj) { @@ -39,11 +41,24 @@ export function clone(obj) { } return cloned; } + +export function defaults(obj1, obj2) { + let newObj = obj2 || {}; + if (!obj2._defaults) { + newObj = {}; + const defaults = CloneHelper(obj1); + newObj._defaults = defaults; + const cloned = obj2 ? CloneHelper(obj2) : {}; + Object.assign(newObj, defaults, cloned); + } + return newObj; +} + export function copyOptions(obj1, obj2) { if (obj2 && obj2._defaults) { return obj2; } - const opts = utils.defaults(obj1, obj2); + const opts = defaults(obj1, obj2); if (opts.strictMath) { opts.math = Constants.Math.STRICT_LEGACY; } @@ -82,17 +97,7 @@ export function copyOptions(obj1, obj2) { } return opts; } -export function defaults(obj1, obj2) { - let newObj = obj2 || {}; - if (!obj2._defaults) { - newObj = {}; - const defaults = CloneHelper(obj1); - newObj._defaults = defaults; - const cloned = obj2 ? CloneHelper(obj2) : {}; - Object.assign(newObj, defaults, cloned); - } - return newObj; -} + export function merge(obj1, obj2) { for (const prop in obj2) { if (obj2.hasOwnProperty(prop)) { @@ -101,11 +106,12 @@ export function merge(obj1, obj2) { } return obj1; } + export function flattenArray(arr, result = []) { for (let i = 0, length = arr.length; i < length; i++) { const value = arr[i]; if (Array.isArray(value)) { - utils.flattenArray(value, result); + flattenArray(value, result); } else { if (value !== undefined) { result.push(value); diff --git a/lib/less/visitors/extend-visitor.js b/lib/less/visitors/extend-visitor.js index 962cba43a..f9e5b40c0 100644 --- a/lib/less/visitors/extend-visitor.js +++ b/lib/less/visitors/extend-visitor.js @@ -57,7 +57,7 @@ class ExtendFinderVisitor { const selExtendList = selector.extendList; extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList) - : allSelectorsExtendList; + : allSelectorsExtendList; if (extendList) { extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone()); diff --git a/lib/lessc.js b/lib/lessc.js new file mode 100755 index 000000000..efa6cc93f --- /dev/null +++ b/lib/lessc.js @@ -0,0 +1,557 @@ +import path from 'path'; +import fs from './less-node/fs'; +import os from 'os'; +import * as utils from './less/utils'; +import * as Constants from './less/constants'; +let errno; +let mkdirp; + +try { + errno = require('errno'); +} catch (err) { + errno = null; +} + +import less from './less-node'; +const pluginManager = new less.PluginManager(less); +const fileManager = new less.FileManager(); +const plugins = []; +const queuePlugins = []; +let args = process.argv.slice(1); +let silent = false; +let verbose = false; +const options = less.options; + +options.plugins = plugins; +options.reUsePluginManager = true; + +const sourceMapOptions = {}; +let continueProcessing = true; + +// Calling process.exit does not flush stdout always. Instead of exiting the process, we set the process' exitCode, +// close all handles and wait for the event loop to exit the process. +// @see https://github.com/nodejs/node/issues/6409 +// Unfortunately, node 0.10.x does not support setting process.exitCode, so we need to call reallyExit() explicitly. +// @see https://nodejs.org/api/process.html#process_process_exitcode +// Additionally we also need to make sure that uncaughtExceptions are never swallowed. +// @see https://github.com/less/less.js/issues/2881 +// This code can safely be removed if node 0.10.x is not supported anymore. +process.on('exit', () => { process.reallyExit(process.exitCode); }); +process.on('uncaughtException', err => { + console.error(err); + process.exitCode = 1; +}); +// This code will still be required because otherwise rejected promises would not be reported to the user +process.on('unhandledRejection', err => { + console.error(err); + process.exitCode = 1; +}); + +const checkArgFunc = (arg, option) => { + if (!option) { + console.error(`${arg} option requires a parameter`); + continueProcessing = false; + process.exitCode = 1; + return false; + } + return true; +}; + +const checkBooleanArg = arg => { + const onOff = /^((on|t|true|y|yes)|(off|f|false|n|no))$/i.exec(arg); + if (!onOff) { + console.error(` unable to parse ${arg} as a boolean. use one of on/t/true/y/yes/off/f/false/n/no`); + continueProcessing = false; + process.exitCode = 1; + return false; + } + return Boolean(onOff[2]); +}; + +const parseVariableOption = (option, variables) => { + const parts = option.split('=', 2); + variables[parts[0]] = parts[1]; +}; + +let sourceMapFileInline = false; + +function printUsage() { + less.lesscHelper.printUsage(); + pluginManager.Loader.printUsage(plugins); + continueProcessing = false; +} +function render() { + + if (!continueProcessing) { + return; + } + + let input = args[1]; + if (input && input != '-') { + input = path.resolve(process.cwd(), input); + } + let output = args[2]; + const outputbase = args[2]; + if (output) { + output = path.resolve(process.cwd(), output); + } + + if (options.sourceMap) { + + sourceMapOptions.sourceMapInputFilename = input; + if (!sourceMapOptions.sourceMapFullFilename) { + if (!output && !sourceMapFileInline) { + console.error('the sourcemap option only has an optional filename if the css filename is given'); + console.error('consider adding --source-map-map-inline which embeds the sourcemap into the css'); + process.exitCode = 1; + return; + } + // its in the same directory, so always just the basename + if (output) { + sourceMapOptions.sourceMapOutputFilename = path.basename(output); + sourceMapOptions.sourceMapFullFilename = `${output}.map`; + } + // its in the same directory, so always just the basename + if ('sourceMapFullFilename' in sourceMapOptions) { + sourceMapOptions.sourceMapFilename = path.basename(sourceMapOptions.sourceMapFullFilename); + } + } else if (options.sourceMap && !sourceMapFileInline) { + const mapFilename = path.resolve(process.cwd(), sourceMapOptions.sourceMapFullFilename); + const mapDir = path.dirname(mapFilename); + const outputDir = path.dirname(output); + // find the path from the map to the output file + sourceMapOptions.sourceMapOutputFilename = path.join( + path.relative(mapDir, outputDir), path.basename(output)); + + // make the sourcemap filename point to the sourcemap relative to the css file output directory + sourceMapOptions.sourceMapFilename = path.join( + path.relative(outputDir, mapDir), path.basename(sourceMapOptions.sourceMapFullFilename)); + } + } + + if (sourceMapOptions.sourceMapBasepath === undefined) { + sourceMapOptions.sourceMapBasepath = input ? path.dirname(input) : process.cwd(); + } + + if (sourceMapOptions.sourceMapRootpath === undefined) { + const pathToMap = path.dirname((sourceMapFileInline ? output : sourceMapOptions.sourceMapFullFilename) || '.'); + const pathToInput = path.dirname(sourceMapOptions.sourceMapInputFilename || '.'); + sourceMapOptions.sourceMapRootpath = path.relative(pathToMap, pathToInput); + } + + + if (!input) { + console.error('lessc: no input files'); + console.error(''); + printUsage(); + process.exitCode = 1; + return; + } + + const ensureDirectory = filepath => { + const dir = path.dirname(filepath); + let cmd; + const existsSync = fs.existsSync || path.existsSync; + if (!existsSync(dir)) { + if (mkdirp === undefined) { + try {mkdirp = require('mkdirp');} + catch (e) { mkdirp = null; } + } + cmd = mkdirp && mkdirp.sync || fs.mkdirSync; + cmd(dir); + } + }; + + if (options.depends) { + if (!outputbase) { + console.error('option --depends requires an output path to be specified'); + process.exitCode = 1; + return; + } + process.stdout.write(`${outputbase}: `); + } + + if (!sourceMapFileInline) { + var writeSourceMap = (output = '', onDone) => { + const filename = sourceMapOptions.sourceMapFullFilename; + ensureDirectory(filename); + fs.writeFile(filename, output, 'utf8', err => { + if (err) { + let description = 'Error: '; + if (errno && errno.errno[err.errno]) { + description += errno.errno[err.errno].description; + } else { + description += `${err.code} ${err.message}`; + } + console.error(`lessc: failed to create file ${filename}`); + console.error(description); + process.exitCode = 1; + } else { + less.logger.info(`lessc: wrote ${filename}`); + } + onDone(); + }); + }; + } + + const writeSourceMapIfNeeded = (output, onDone) => { + if (options.sourceMap && !sourceMapFileInline) { + writeSourceMap(output, onDone); + } else { + onDone(); + } + }; + + const writeOutput = (output, result, onSuccess) => { + if (options.depends) { + onSuccess(); + } else if (output) { + ensureDirectory(output); + fs.writeFile(output, result.css, {encoding: 'utf8'}, err => { + if (err) { + let description = 'Error: '; + if (errno && errno.errno[err.errno]) { + description += errno.errno[err.errno].description; + } else { + description += `${err.code} ${err.message}`; + } + console.error(`lessc: failed to create file ${output}`); + console.error(description); + process.exitCode = 1; + } else { + less.logger.info(`lessc: wrote ${output}`); + onSuccess(); + } + }); + } else if (!options.depends) { + process.stdout.write(result.css); + onSuccess(); + } + }; + + const logDependencies = (options, result) => { + if (options.depends) { + let depends = ''; + for (let i = 0; i < result.imports.length; i++) { + depends += `${result.imports[i]} `; + } + console.log(depends); + } + }; + + const parseLessFile = (e, data) => { + if (e) { + console.error(`lessc: ${e.message}`); + process.exitCode = 1; + return; + } + + data = data.replace(/^\uFEFF/, ''); + + options.paths = [path.dirname(input)].concat(options.paths); + options.filename = input; + + if (options.lint) { + options.sourceMap = false; + } + sourceMapOptions.sourceMapFileInline = sourceMapFileInline; + + if (options.sourceMap) { + options.sourceMap = sourceMapOptions; + } + + less.logger.addListener({ + info: function(msg) { + if (verbose) { + console.log(msg); + } + }, + warn: function(msg) { + // do not show warning if the silent option is used + if (!silent) { + console.warn(msg); + } + }, + error: function(msg) { + console.error(msg); + } + }); + + less.render(data, options) + .then(result => { + if (!options.lint) { + writeOutput(output, result, () => { + writeSourceMapIfNeeded(result.map, () => { + logDependencies(options, result); + }); + }); + } + }, + err => { + if (!options.silent) { + console.error(err.toString({ + stylize: options.color && less.lesscHelper.stylize + })); + } + process.exitCode = 1; + }); + }; + + if (input != '-') { + fs.readFile(input, 'utf8', parseLessFile); + } else { + process.stdin.resume(); + process.stdin.setEncoding('utf8'); + + let buffer = ''; + process.stdin.on('data', data => { + buffer += data; + }); + + process.stdin.on('end', () => { + parseLessFile(false, buffer); + }); + } +} + +function processPluginQueue() { + let x = 0; + + function pluginError(name) { + console.error(`Unable to load plugin ${name} please make sure that it is installed under or at the same level as less`); + process.exitCode = 1; + } + function pluginFinished(plugin) { + x++; + plugins.push(plugin); + if (x === queuePlugins.length) { + render(); + } + } + queuePlugins.forEach(queue => { + const context = utils.clone(options); + pluginManager.Loader.loadPlugin(queue.name, process.cwd(), context, less.environment, fileManager) + .then(data => { + pluginFinished({ + fileContent: data.contents, + filename: data.filename, + options: queue.options + }); + }) + .catch(() => { + pluginError(queue.name); + }); + }); +} + +// self executing function so we can return +(() => { + args = args.filter(arg => { + let match; + + match = arg.match(/^-I(.+)$/); + if (match) { + options.paths.push(match[1]); + return false; + } + + match = arg.match(/^--?([a-z][0-9a-z-]*)(?:=(.*))?$/i); + if (match) { + arg = match[1]; + } else { + return arg; + } + + switch (arg) { + case 'v': + case 'version': + console.log(`lessc ${less.version.join('.')} (Less Compiler) [JavaScript]`); + continueProcessing = false; + break; + case 'verbose': + verbose = true; + break; + case 's': + case 'silent': + silent = true; + break; + case 'l': + case 'lint': + options.lint = true; + break; + case 'strict-imports': + options.strictImports = true; + break; + case 'h': + case 'help': + printUsage(); + break; + case 'x': + case 'compress': + options.compress = true; + break; + case 'insecure': + options.insecure = true; + break; + case 'M': + case 'depends': + options.depends = true; + break; + case 'max-line-len': + if (checkArgFunc(arg, match[2])) { + options.maxLineLen = parseInt(match[2], 10); + if (options.maxLineLen <= 0) { + options.maxLineLen = -1; + } + } + break; + case 'no-color': + options.color = false; + break; + case 'js': + options.javascriptEnabled = true; + break; + case 'no-js': + console.error('The "--no-js" argument is deprecated, as inline JavaScript ' + + 'is disabled by default. Use "--js" to enable inline JavaScript (not recommended).'); + break; + case 'include-path': + if (checkArgFunc(arg, match[2])) { + // ; supported on windows. + // : supported on windows and linux, excluding a drive letter like C:\ so C:\file:D:\file parses to 2 + options.paths = match[2] + .split(os.type().match(/Windows/) ? /:(?!\\)|;/ : ':') + .map(p => { + if (p) { + return path.resolve(process.cwd(), p); + } + }); + } + break; + case 'line-numbers': + if (checkArgFunc(arg, match[2])) { + options.dumpLineNumbers = match[2]; + } + break; + case 'source-map': + options.sourceMap = true; + if (match[2]) { + sourceMapOptions.sourceMapFullFilename = match[2]; + } + break; + case 'source-map-rootpath': + if (checkArgFunc(arg, match[2])) { + sourceMapOptions.sourceMapRootpath = match[2]; + } + break; + case 'source-map-basepath': + if (checkArgFunc(arg, match[2])) { + sourceMapOptions.sourceMapBasepath = match[2]; + } + break; + case 'source-map-inline': + case 'source-map-map-inline': + sourceMapFileInline = true; + options.sourceMap = true; + break; + case 'source-map-include-source': + case 'source-map-less-inline': + sourceMapOptions.outputSourceFiles = true; + break; + case 'source-map-url': + if (checkArgFunc(arg, match[2])) { + sourceMapOptions.sourceMapURL = match[2]; + } + break; + case 'rp': + case 'rootpath': + if (checkArgFunc(arg, match[2])) { + options.rootpath = match[2].replace(/\\/g, '/'); + } + break; + case 'relative-urls': + console.warn('The --relative-urls option has been deprecated. Use --rewrite-urls=all.'); + options.rewriteUrls = Constants.RewriteUrls.ALL; + break; + case 'ru': + case 'rewrite-urls': + const m = match[2]; + if (m) { + if (m === 'local') { + options.rewriteUrls = Constants.RewriteUrls.LOCAL; + } else if (m === 'off') { + options.rewriteUrls = Constants.RewriteUrls.OFF; + } else if (m === 'all') { + options.rewriteUrls = Constants.RewriteUrls.ALL; + } else { + console.error(`Unknown rewrite-urls argument ${m}`); + continueProcessing = false; + process.exitCode = 1; + } + } else { + options.rewriteUrls = Constants.RewriteUrls.ALL; + } + break; + case 'sm': + case 'strict-math': + console.warn('The --strict-math option has been deprecated. Use --math=strict.'); + if (checkArgFunc(arg, match[2])) { + if (checkBooleanArg(match[2])) { + options.math = Constants.Math.STRICT_LEGACY; + } + } + break; + case 'm': + case 'math': + if (checkArgFunc(arg, match[2])) { + options.math = match[2]; + } + break; + case 'su': + case 'strict-units': + if (checkArgFunc(arg, match[2])) { + options.strictUnits = checkBooleanArg(match[2]); + } + break; + case 'global-var': + if (checkArgFunc(arg, match[2])) { + if (!options.globalVars) { + options.globalVars = {}; + } + parseVariableOption(match[2], options.globalVars); + } + break; + case 'modify-var': + if (checkArgFunc(arg, match[2])) { + if (!options.modifyVars) { + options.modifyVars = {}; + } + + parseVariableOption(match[2], options.modifyVars); + } + break; + case 'url-args': + if (checkArgFunc(arg, match[2])) { + options.urlArgs = match[2]; + } + break; + case 'plugin': + const splitupArg = match[2].match(/^([^=]+)(=(.*))?/); + const name = splitupArg[1]; + const pluginOptions = splitupArg[3]; + queuePlugins.push({ name, options: pluginOptions }); + break; + default: + queuePlugins.push({ name: arg, options: match[2], default: true }); + break; + } + }); + + if (queuePlugins.length > 0) { + processPluginQueue(); + } + else { + render(); + } + +})(); diff --git a/package.json b/package.json index b7fb9d0b9..20af945c7 100644 --- a/package.json +++ b/package.json @@ -60,22 +60,20 @@ "diff": "^3.2.0", "git-rev": "^0.2.1", "grunt": "~0.4.5", - "grunt-browserify": "^5.0.0", "grunt-cli": "^1.2.0", "grunt-contrib-clean": "^1.0.0", "grunt-contrib-concat": "^1.0.1", "grunt-contrib-connect": "^1.0.2", "grunt-contrib-jasmine": "^1.2.0", "grunt-contrib-uglify": "^1.0.1", - "grunt-eslint": "^19.0.0", - "grunt-rollup": "^10.0.0", + "grunt-eslint": "^22.0.0", "grunt-saucelabs": "^9.0.0", "grunt-shell": "^1.3.0", "import-module": "file:test/import-module", "jit-grunt": "^0.10.0", - "lebab": "^3.1.0", "less-plugin-autoprefix": "^1.5.1", "less-plugin-clean-css": "^1.5.1", + "minimist": "^1.2.0", "performance-now": "^0.2.0", "phantomjs-polyfill-object-assign": "0.0.2", "phantomjs-prebuilt": "^2.1.16", @@ -88,6 +86,7 @@ "rollup-plugin-node-resolve": "^5.2.0", "rollup-plugin-terser": "^5.1.1", "time-grunt": "^1.3.0", + "typescript": "^3.5.3", "uikit": "2.27.4" }, "keywords": [ diff --git a/test/browser/common.js b/test/browser/common.js index fe83fea2e..fcdc184a1 100644 --- a/test/browser/common.js +++ b/test/browser/common.js @@ -183,38 +183,38 @@ testErrorSheet = function (sheet) { return actualErrorElement !== null; }).then(function () { var innerText = (actualErrorElement.innerHTML - .replace(/

    |<\/?p>||<\/a>|
      |<\/?pre( class="?[^">]*"?)?>|<\/li>|<\/?label>/ig, '') - .replace(/<\/h3>/ig, ' ') - .replace(/
    • |<\/ul>|
      /ig, '\n')) - .replace(/&/ig, '&') - // for IE8 - .replace(/\r\n/g, '\n') - .replace(/\. \nin/, '. in'); + .replace(/

      |<\/?p>||<\/a>|
        |<\/?pre( class="?[^">]*"?)?>|<\/li>|<\/?label>/ig, '') + .replace(/<\/h3>/ig, ' ') + .replace(/
      • |<\/ul>|
        /ig, '\n')) + .replace(/&/ig, '&') + // for IE8 + .replace(/\r\n/g, '\n') + .replace(/\. \nin/, '. in'); actualErrorMsg = innerText - .replace(/\n\d+/g, function (lineNo) { - return lineNo + ' '; - }) - .replace(/\n\s*in /g, ' in ') - .replace(/\n{2,}/g, '\n') - .replace(/\nStack Trace\n[\s\S]*/i, '') - .replace(/\n$/, '') - .trim(); + .replace(/\n\d+/g, function (lineNo) { + return lineNo + ' '; + }) + .replace(/\n\s*in /g, ' in ') + .replace(/\n{2,}/g, '\n') + .replace(/\nStack Trace\n[\s\S]*/i, '') + .replace(/\n$/, '') + .trim(); errorFile - .then(function (errorTxt) { - errorTxt = errorTxt - .replace(/\{path\}/g, '') - .replace(/\{pathrel\}/g, '') - .replace(/\{pathhref\}/g, 'http://localhost:8081/test/less/errors/') - .replace(/\{404status\}/g, ' (404)') - .replace(/\{node\}[\s\S]*\{\/node\}/g, '') - .replace(/\n$/, '') - .trim(); - expect(actualErrorMsg).toEqual(errorTxt); - if (errorTxt == actualErrorMsg) { - actualErrorElement.style.display = 'none'; - } - done(); - }); + .then(function (errorTxt) { + errorTxt = errorTxt + .replace(/\{path\}/g, '') + .replace(/\{pathrel\}/g, '') + .replace(/\{pathhref\}/g, 'http://localhost:8081/test/less/errors/') + .replace(/\{404status\}/g, ' (404)') + .replace(/\{node\}[\s\S]*\{\/node\}/g, '') + .replace(/\n$/, '') + .trim(); + expect(actualErrorMsg).toEqual(errorTxt); + if (errorTxt == actualErrorMsg) { + actualErrorElement.style.display = 'none'; + } + done(); + }); }); }); }; diff --git a/test/browser/css/urls.css b/test/browser/css/urls.css index c3a09234b..dbd558ab4 100644 --- a/test/browser/css/urls.css +++ b/test/browser/css/urls.css @@ -47,9 +47,6 @@ uri-1: url('http://localhost:8081/test/data/page.html'); uri-2: url('http://localhost:8081/test/data/page.html'); } -#data-uri-toobig { - uri: url('http://localhost:8081/test/data/data-uri-fail.png'); -} #svg-functions { background-image: url('data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%201%201%22%3E%3ClinearGradient%20id%3D%22g%22%20x1%3D%220%25%22%20y1%3D%220%25%22%20x2%3D%220%25%22%20y2%3D%22100%25%22%3E%3Cstop%20offset%3D%220%25%22%20stop-color%3D%22%23000000%22%2F%3E%3Cstop%20offset%3D%22100%25%22%20stop-color%3D%22%23ffffff%22%2F%3E%3C%2FlinearGradient%3E%3Crect%20x%3D%220%22%20y%3D%220%22%20width%3D%221%22%20height%3D%221%22%20fill%3D%22url(%23g)%22%20%2F%3E%3C%2Fsvg%3E'); background-image: url('data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%201%201%22%3E%3ClinearGradient%20id%3D%22g%22%20x1%3D%220%25%22%20y1%3D%220%25%22%20x2%3D%220%25%22%20y2%3D%22100%25%22%3E%3Cstop%20offset%3D%220%25%22%20stop-color%3D%22%23000000%22%2F%3E%3Cstop%20offset%3D%223%25%22%20stop-color%3D%22%23ffa500%22%2F%3E%3Cstop%20offset%3D%22100%25%22%20stop-color%3D%22%23ffffff%22%2F%3E%3C%2FlinearGradient%3E%3Crect%20x%3D%220%22%20y%3D%220%22%20width%3D%221%22%20height%3D%221%22%20fill%3D%22url(%23g)%22%20%2F%3E%3C%2Fsvg%3E'); diff --git a/test/browser/less/urls.less b/test/browser/less/urls.less index 7de201ad8..ad8e968a0 100644 --- a/test/browser/less/urls.less +++ b/test/browser/less/urls.less @@ -46,9 +46,6 @@ uri-2: data-uri('../../data/page.html'); } -#data-uri-toobig { - uri: data-uri('../../data/data-uri-fail.png'); -} #svg-functions { @colorlist1: black, white; background-image: svg-gradient(to bottom, @colorlist1); diff --git a/test/css/urls.css b/test/css/urls.css index 4da7dfa04..1ca83e80d 100644 --- a/test/css/urls.css +++ b/test/css/urls.css @@ -69,7 +69,6 @@ uri-2: url("data:text/html,%3Chtml%3E%3Ch1%3EThis%20page%20is%20100%25%20Awesome.%3C%2Fh1%3E%3C%2Fhtml%3E%0A"); } #file-functions { - uri: url('../data/data-uri-fail.png'); svg-not-base-64: url("data:image/svg+xml,%3C%3Fxml%20version%3D%221.0%22%20encoding%3D%22UTF-8%22%20standalone%3D%22no%22%3F%3E%0A%3Csvg%20height%3D%22100%22%20width%3D%22100%22%3E%0A%20%20%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2240%22%20stroke%3D%22black%22%20stroke-width%3D%221%22%20fill%3D%22blue%22%20%2F%3E%0A%3C%2Fsvg%3E%0A"); size: 640px 430px; width: 640px; diff --git a/test/index.js b/test/index.js index bd877186e..98e885849 100644 --- a/test/index.js +++ b/test/index.js @@ -12,13 +12,10 @@ var testMap = [ // TODO: Change this to rewriteUrls: 'all' once the relativeUrls option is removed relativeUrls: true, silent: true, - javascriptEnabled: true, - // Set explicitly for legacy tests for >3.0 - ieCompat: true + javascriptEnabled: true }], [{ - math: 'strict-legacy', - ieCompat: true + math: 'strict-legacy' }, 'math/strict-legacy/'], [{ math: 'parens' diff --git a/test/less-test.js b/test/less-test.js index a08c9d97a..dbdda3dd6 100644 --- a/test/less-test.js +++ b/test/less-test.js @@ -7,7 +7,7 @@ module.exports = function() { doBomTest = false, clone = require('clone'); - var less = require('../lib/less-node'); + var less = require('../tmp/less.cjs.js'); var stylize = require('../lib/less-node/lessc-helper').stylize; var globals = Object.keys(global); @@ -186,16 +186,16 @@ module.exports = function() { pathimportesc = pathimport.replace(/[.:/\\]/g, function(a) { return '\\' + (a == '\\' ? '\/' : a); }); return input.replace(/\{path\}/g, p) - .replace(/\{node\}/g, '') - .replace(/\{\/node\}/g, '') - .replace(/\{pathhref\}/g, '') - .replace(/\{404status\}/g, '') - .replace(/\{nodepath\}/g, path.join(process.cwd(), 'node_modules', '/')) - .replace(/\{pathrel\}/g, path.join(path.relative(process.cwd(), p), '/')) - .replace(/\{pathesc\}/g, pathesc) - .replace(/\{pathimport\}/g, pathimport) - .replace(/\{pathimportesc\}/g, pathimportesc) - .replace(/\r\n/g, '\n'); + .replace(/\{node\}/g, '') + .replace(/\{\/node\}/g, '') + .replace(/\{pathhref\}/g, '') + .replace(/\{404status\}/g, '') + .replace(/\{nodepath\}/g, path.join(process.cwd(), 'node_modules', '/')) + .replace(/\{pathrel\}/g, path.join(path.relative(process.cwd(), p), '/')) + .replace(/\{pathesc\}/g, pathesc) + .replace(/\{pathimport\}/g, pathimport) + .replace(/\{pathimportesc\}/g, pathimportesc) + .replace(/\r\n/g, '\n'); } function checkGlobalLeaks() { diff --git a/test/less/urls.less b/test/less/urls.less index 26eb58d45..244488bfc 100644 --- a/test/less/urls.less +++ b/test/less/urls.less @@ -61,7 +61,6 @@ } #file-functions { - uri: data-uri('../data/data-uri-fail.png'); svg-not-base-64: data-uri('../data/image.svg'); size: image-size('../data/data-uri-fail.png'); width: image-width('../data/data-uri-fail.png'); From 695f9d24a3da60121bd3e738efd5e28e9e4eff72 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Thu, 1 Aug 2019 22:42:21 -0700 Subject: [PATCH 06/17] Proper dist files --- Gruntfile.js | 3 +- bin/lessc | 769 +++++++++++++------------ build/rollup.js | 2 +- dist/less.cjs.js | 763 +++++++++++++------------ dist/less.js | 1287 +++++++++++++++++++++++------------------- dist/less.min.js | 2 +- dist/less.min.js.map | 2 +- index.js | 2 +- lib/less/index.js | 2 +- package.json | 2 +- 10 files changed, 1539 insertions(+), 1295 deletions(-) diff --git a/Gruntfile.js b/Gruntfile.js index e0d9c4c3b..f6d842f9e 100644 --- a/Gruntfile.js +++ b/Gruntfile.js @@ -190,8 +190,7 @@ module.exports = function(grunt) { }, build: { command: [ - "node build/rollup.js --dist", - "node build/rollup.js --lessc" + "node build/rollup.js --dist" ].join(" && ") }, testbuild: { diff --git a/bin/lessc b/bin/lessc index 0f5cfad85..ed1ee781c 100644 --- a/bin/lessc +++ b/bin/lessc @@ -2,14 +2,10 @@ 'use strict'; -function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; } - -var path = _interopDefault(require('path')); -var os = _interopDefault(require('os')); -var CloneHelper = _interopDefault(require('clone')); -var mime = _interopDefault(require('mime')); -var sourceMap = _interopDefault(require('source-map')); -var url = _interopDefault(require('url')); +var path = require('path'); +var os = require('os'); +var CloneHelper = require('clone'); +var url = require('url'); let fs; @@ -74,12 +70,25 @@ function clone(obj) { return cloned; } +function defaults(obj1, obj2) { + let newObj = obj2 || {}; + + if (!obj2._defaults) { + newObj = {}; + const defaults = CloneHelper(obj1); + newObj._defaults = defaults; + const cloned = obj2 ? CloneHelper(obj2) : {}; + Object.assign(newObj, defaults, cloned); + } + + return newObj; +} function copyOptions(obj1, obj2) { if (obj2 && obj2._defaults) { return obj2; } - const opts = utils.defaults(obj1, obj2); + const opts = defaults(obj1, obj2); if (opts.strictMath) { opts.math = Math$1.STRICT_LEGACY; @@ -128,19 +137,6 @@ function copyOptions(obj1, obj2) { return opts; } -function defaults(obj1, obj2) { - let newObj = obj2 || {}; - - if (!obj2._defaults) { - newObj = {}; - const defaults = CloneHelper(obj1); - newObj._defaults = defaults; - const cloned = obj2 ? CloneHelper(obj2) : {}; - Object.assign(newObj, defaults, cloned); - } - - return newObj; -} function merge(obj1, obj2) { for (const prop in obj2) { if (obj2.hasOwnProperty(prop)) { @@ -155,7 +151,7 @@ function flattenArray(arr, result = []) { const value = arr[i]; if (Array.isArray(value)) { - utils.flattenArray(value, result); + flattenArray(value, result); } else { if (value !== undefined) { result.push(value); @@ -166,12 +162,12 @@ function flattenArray(arr, result = []) { return result; } -var utils$1 = /*#__PURE__*/Object.freeze({ +var utils = /*#__PURE__*/Object.freeze({ getLocation: getLocation, copyArray: copyArray, clone: clone, - copyOptions: copyOptions, defaults: defaults, + copyOptions: copyOptions, merge: merge, flattenArray: flattenArray }); @@ -183,153 +179,163 @@ var environment = { return buffer.toString('base64'); }, mimeLookup: function mimeLookup(filename) { - return mime.lookup(filename); + return require('mime').lookup(filename); }, charsetLookup: function charsetLookup(mime) { - return mime.charsets.lookup(mime); + return require('mime').charsets.lookup(mime); }, getSourceMapGenerator: function getSourceMapGenerator() { - return sourceMap.SourceMapGenerator; + return require('source-map').SourceMapGenerator; } }; -const abstractFileManager = () => {}; +class AbstractFileManager { + getPath(filename) { + let j = filename.lastIndexOf('?'); -abstractFileManager.prototype.getPath = filename => { - let j = filename.lastIndexOf('?'); + if (j > 0) { + filename = filename.slice(0, j); + } - if (j > 0) { - filename = filename.slice(0, j); - } + j = filename.lastIndexOf('/'); - j = filename.lastIndexOf('/'); + if (j < 0) { + j = filename.lastIndexOf('\\'); + } - if (j < 0) { - j = filename.lastIndexOf('\\'); - } + if (j < 0) { + return ''; + } - if (j < 0) { - return ''; + return filename.slice(0, j + 1); } - return filename.slice(0, j + 1); -}; + tryAppendExtension(path, ext) { + return /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + } -abstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + tryAppendLessExtension(path) { + return this.tryAppendExtension(path, '.less'); + } -abstractFileManager.prototype.tryAppendLessExtension = function (path) { - return this.tryAppendExtension(path, '.less'); -}; + supportsSync() { + return false; + } -abstractFileManager.prototype.supportsSync = () => false; + alwaysMakePathsAbsolute() { + return false; + } -abstractFileManager.prototype.alwaysMakePathsAbsolute = () => false; + isPathAbsolute(filename) { + return /^(?:[a-z-]+:|\/|\\|#)/i.test(filename); + } // TODO: pull out / replace? -abstractFileManager.prototype.isPathAbsolute = filename => /^(?:[a-z-]+:|\/|\\|#)/i.test(filename); // TODO: pull out / replace? + join(basePath, laterPath) { + if (!basePath) { + return laterPath; + } -abstractFileManager.prototype.join = (basePath, laterPath) => { - if (!basePath) { - return laterPath; + return basePath + laterPath; } - return basePath + laterPath; -}; - -abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { - // diff between two paths to create a relative path - const urlParts = this.extractUrlParts(url); - const baseUrlParts = this.extractUrlParts(baseUrl); - let i; - let max; - let urlDirectories; - let baseUrlDirectories; - let diff = ''; + pathDiff(url, baseUrl) { + // diff between two paths to create a relative path + const urlParts = this.extractUrlParts(url); + const baseUrlParts = this.extractUrlParts(baseUrl); + let i; + let max; + let urlDirectories; + let baseUrlDirectories; + let diff = ''; - if (urlParts.hostPart !== baseUrlParts.hostPart) { - return ''; - } + if (urlParts.hostPart !== baseUrlParts.hostPart) { + return ''; + } - max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); + max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); - for (i = 0; i < max; i++) { - if (baseUrlParts.directories[i] !== urlParts.directories[i]) { - break; + for (i = 0; i < max; i++) { + if (baseUrlParts.directories[i] !== urlParts.directories[i]) { + break; + } } - } - baseUrlDirectories = baseUrlParts.directories.slice(i); - urlDirectories = urlParts.directories.slice(i); - - for (i = 0; i < baseUrlDirectories.length - 1; i++) { - diff += '../'; - } + baseUrlDirectories = baseUrlParts.directories.slice(i); + urlDirectories = urlParts.directories.slice(i); - for (i = 0; i < urlDirectories.length - 1; i++) { - diff += `${urlDirectories[i]}/`; - } + for (i = 0; i < baseUrlDirectories.length - 1; i++) { + diff += '../'; + } - return diff; -}; // helper function, not part of API + for (i = 0; i < urlDirectories.length - 1; i++) { + diff += `${urlDirectories[i]}/`; + } + return diff; + } -abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) { - // urlParts[1] = protocol://hostname/ OR / - // urlParts[2] = / if path relative to host base - // urlParts[3] = directories - // urlParts[4] = filename - // urlParts[5] = parameters - const urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; - const urlParts = url.match(urlPartsRegex); - const returner = {}; - let rawDirectories = []; - const directories = []; - let i; - let baseUrlParts; + // helper function, not part of API + extractUrlParts(url, baseUrl) { + // urlParts[1] = protocol://hostname/ OR / + // urlParts[2] = / if path relative to host base + // urlParts[3] = directories + // urlParts[4] = filename + // urlParts[5] = parameters + const urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; + const urlParts = url.match(urlPartsRegex); + const returner = {}; + let rawDirectories = []; + const directories = []; + let i; + let baseUrlParts; - if (!urlParts) { - throw new Error(`Could not parse sheet href - '${url}'`); - } // Stylesheets in IE don't always return the full path + if (!urlParts) { + throw new Error(`Could not parse sheet href - '${url}'`); + } // Stylesheets in IE don't always return the full path - if (baseUrl && (!urlParts[1] || urlParts[2])) { - baseUrlParts = baseUrl.match(urlPartsRegex); + if (baseUrl && (!urlParts[1] || urlParts[2])) { + baseUrlParts = baseUrl.match(urlPartsRegex); - if (!baseUrlParts) { - throw new Error(`Could not parse page url - '${baseUrl}'`); - } + if (!baseUrlParts) { + throw new Error(`Could not parse page url - '${baseUrl}'`); + } - urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; + urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; - if (!urlParts[2]) { - urlParts[3] = baseUrlParts[3] + urlParts[3]; + if (!urlParts[2]) { + urlParts[3] = baseUrlParts[3] + urlParts[3]; + } } - } - if (urlParts[3]) { - rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); // collapse '..' and skip '.' + if (urlParts[3]) { + rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); // collapse '..' and skip '.' - for (i = 0; i < rawDirectories.length; i++) { - if (rawDirectories[i] === '..') { - directories.pop(); - } else if (rawDirectories[i] !== '.') { - directories.push(rawDirectories[i]); + for (i = 0; i < rawDirectories.length; i++) { + if (rawDirectories[i] === '..') { + directories.pop(); + } else if (rawDirectories[i] !== '.') { + directories.push(rawDirectories[i]); + } } } + + returner.hostPart = urlParts[1]; + returner.directories = directories; + returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); + returner.path = (urlParts[1] || '') + directories.join('/'); + returner.filename = urlParts[4]; + returner.fileUrl = returner.path + (urlParts[4] || ''); + returner.url = returner.fileUrl + (urlParts[5] || ''); + return returner; } - returner.hostPart = urlParts[1]; - returner.directories = directories; - returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); - returner.path = (urlParts[1] || '') + directories.join('/'); - returner.filename = urlParts[4]; - returner.fileUrl = returner.path + (urlParts[4] || ''); - returner.url = returner.fileUrl + (urlParts[5] || ''); - return returner; -}; +} -class FileManager extends abstractFileManager { +class FileManager extends AbstractFileManager { constructor() { + super(); this.contents = {}; } @@ -553,69 +559,70 @@ var logger = { const isUrlRe = /^(?:https?:)?\/\//i; let request; -const UrlFileManager = () => {}; - -UrlFileManager.prototype = new abstractFileManager(); - -UrlFileManager.prototype.supports = (filename, currentDirectory, options, environment) => isUrlRe.test(filename) || isUrlRe.test(currentDirectory); +class UrlFileManager extends AbstractFileManager { + supports(filename, currentDirectory, options, environment) { + return isUrlRe.test(filename) || isUrlRe.test(currentDirectory); + } -UrlFileManager.prototype.loadFile = (filename, currentDirectory, options, environment) => { - return new Promise((fulfill, reject) => { - if (request === undefined) { - try { - request = require('request'); - } catch (e) { - request = null; + loadFile(filename, currentDirectory, options, environment) { + return new Promise((fulfill, reject) => { + if (request === undefined) { + try { + request = require('request'); + } catch (e) { + request = null; + } } - } - - if (!request) { - reject({ - type: 'File', - message: 'optional dependency \'request\' required to import over http(s)\n' - }); - return; - } - - let urlStr = isUrlRe.test(filename) ? filename : url.resolve(currentDirectory, filename); - const urlObj = url.parse(urlStr); - if (!urlObj.protocol) { - urlObj.protocol = 'http'; - urlStr = urlObj.format(); - } - - request.get({ - uri: urlStr, - strictSSL: !options.insecure - }, (error, res, body) => { - if (error) { + if (!request) { reject({ type: 'File', - message: `resource '${urlStr}' gave this Error:\n ${error}\n` + message: 'optional dependency \'request\' required to import over http(s)\n' }); return; } - if (res && res.statusCode === 404) { - reject({ - type: 'File', - message: `resource '${urlStr}' was not found\n` - }); - return; - } + let urlStr = isUrlRe.test(filename) ? filename : url.resolve(currentDirectory, filename); + const urlObj = url.parse(urlStr); - if (!body) { - logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`); + if (!urlObj.protocol) { + urlObj.protocol = 'http'; + urlStr = urlObj.format(); } - fulfill({ - contents: body, - filename: urlStr + request.get({ + uri: urlStr, + strictSSL: !options.insecure + }, (error, res, body) => { + if (error) { + reject({ + type: 'File', + message: `resource '${urlStr}' gave this Error:\n ${error}\n` + }); + return; + } + + if (res && res.statusCode === 404) { + reject({ + type: 'File', + message: `resource '${urlStr}' was not found\n` + }); + return; + } + + if (!body) { + logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`); + } + + fulfill({ + contents: body, + filename: urlStr + }); }); }); - }); -}; + } + +} var colors = { 'aliceblue': '#f0f8ff', @@ -994,6 +1001,7 @@ Node.numericCompare = (a, b) => a < b ? -1 : a === b ? 0 : a > b ? 1 : undefined class Color extends Node { constructor(rgb, a, originalForm) { + super(); const self = this; // // The end goal here, is to parse the arguments // into an integer triplet, such as `128, 255, 0` @@ -1257,6 +1265,7 @@ Color.fromKeyword = keyword => { class Paren extends Node { constructor(node) { + super(); this.value = node; } @@ -1274,8 +1283,16 @@ class Paren extends Node { Paren.prototype.type = 'Paren'; +const _noSpaceCombinators = { + '': true, + ' ': true, + '|': true +}; + class Combinator extends Node { constructor(value) { + super(); + if (value === ' ') { this.value = ' '; this.emptyOrWhitespace = true; @@ -1293,14 +1310,10 @@ class Combinator extends Node { } Combinator.prototype.type = 'Combinator'; -const _noSpaceCombinators = { - '': true, - ' ': true, - '|': true -}; class Element extends Node { constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) { + super(); this.combinator = combinator instanceof Combinator ? combinator : new Combinator(combinator); if (typeof value === 'string') { @@ -1504,6 +1517,7 @@ LessError.prototype.toString = function (options = {}) { class Selector extends Node { constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) { + super(); this.extendList = extendList; this.condition = condition; this.evaldCondition = !condition; @@ -1641,6 +1655,8 @@ Selector.prototype.type = 'Selector'; class Value extends Node { constructor(value) { + super(); + if (!value) { throw new Error('Value requires an array argument'); } @@ -1684,6 +1700,7 @@ Value.prototype.type = 'Value'; class Keyword extends Node { constructor(value) { + super(); this.value = value; } @@ -1706,6 +1723,7 @@ Keyword.False = new Keyword('false'); class Anonymous extends Node { constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) { + super(); this.value = value; this._index = index; this._fileInfo = currentFileInfo; @@ -1743,6 +1761,7 @@ const MATH = Math$1; class Declaration extends Node { constructor(name, value, important, merge, index, currentFileInfo, inline, variable) { + super(); this.name = name; this.value = value instanceof Node ? value : new Value([value ? new Anonymous(value) : null]); this.important = important ? ` ${important.trim()}` : ''; @@ -1891,6 +1910,7 @@ debugInfo.asMediaQuery = ctx => { class Comment extends Node { constructor(value, isLineComment, index, currentFileInfo) { + super(); this.value = value; this.isLineComment = isLineComment; this._index = index; @@ -1961,7 +1981,6 @@ contexts.Parse = function (options) { const evalCopyProperties = ['paths', // additional include paths 'compress', // whether to compress -'ieCompat', // whether to enforce IE compatibility (IE8 data-uri) 'math', // whether math has to be within parenthesis 'strictUnits', // whether units need to evaluate correctly 'sourceMap', // whether to output a source map @@ -1973,121 +1992,123 @@ const evalCopyProperties = ['paths', // additional include paths 'rewriteUrls' // option - whether to adjust URL's to be relative ]; -contexts.Eval = function (options, frames) { - copyFromOriginal(options, this, evalCopyProperties); - - if (typeof this.paths === 'string') { - this.paths = [this.paths]; - } +function isPathRelative(path) { + return !/^(?:[a-z-]+:|\/|#)/i.test(path); +} - this.frames = frames || []; - this.importantScope = this.importantScope || []; -}; +function isPathLocalRelative(path) { + return path.charAt(0) === '.'; +} -contexts.Eval.prototype.enterCalc = function () { - if (!this.calcStack) { - this.calcStack = []; - } +contexts.Eval = class { + constructor(options, frames) { + copyFromOriginal(options, this, evalCopyProperties); - this.calcStack.push(true); - this.inCalc = true; -}; - -contexts.Eval.prototype.exitCalc = function () { - this.calcStack.pop(); + if (typeof this.paths === 'string') { + this.paths = [this.paths]; + } - if (!this.calcStack) { + this.frames = frames || []; + this.importantScope = this.importantScope || []; this.inCalc = false; + this.mathOn = true; } -}; -contexts.Eval.prototype.inParenthesis = function () { - if (!this.parensStack) { - this.parensStack = []; + enterCalc() { + if (!this.calcStack) { + this.calcStack = []; + } + + this.calcStack.push(true); + this.inCalc = true; } - this.parensStack.push(true); -}; + exitCalc() { + this.calcStack.pop(); -contexts.Eval.prototype.outOfParenthesis = function () { - this.parensStack.pop(); -}; + if (!this.calcStack) { + this.inCalc = false; + } + } -contexts.Eval.prototype.inCalc = false; -contexts.Eval.prototype.mathOn = true; + inParenthesis() { + if (!this.parensStack) { + this.parensStack = []; + } -contexts.Eval.prototype.isMathOn = function (op) { - if (!this.mathOn) { - return false; + this.parensStack.push(true); } - if (op === '/' && this.math !== Math$1.ALWAYS && (!this.parensStack || !this.parensStack.length)) { - return false; + outOfParenthesis() { + this.parensStack.pop(); } - if (this.math > Math$1.PARENS_DIVISION) { - return this.parensStack && this.parensStack.length; - } + isMathOn(op) { + if (!this.mathOn) { + return false; + } - return true; -}; + if (op === '/' && this.math !== Math$1.ALWAYS && (!this.parensStack || !this.parensStack.length)) { + return false; + } -contexts.Eval.prototype.pathRequiresRewrite = function (path) { - const isRelative = this.rewriteUrls === RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; - return isRelative(path); -}; + if (this.math > Math$1.PARENS_DIVISION) { + return this.parensStack && this.parensStack.length; + } -contexts.Eval.prototype.rewritePath = function (path, rootpath) { - let newPath; - rootpath = rootpath || ''; - newPath = this.normalizePath(rootpath + path); // If a path was explicit relative and the rootpath was not an absolute path - // we must ensure that the new path is also explicit relative. + return true; + } - if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { - newPath = `./${newPath}`; + pathRequiresRewrite(path) { + const isRelative = this.rewriteUrls === RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; + return isRelative(path); } - return newPath; -}; + rewritePath(path, rootpath) { + let newPath; + rootpath = rootpath || ''; + newPath = this.normalizePath(rootpath + path); // If a path was explicit relative and the rootpath was not an absolute path + // we must ensure that the new path is also explicit relative. -contexts.Eval.prototype.normalizePath = path => { - const segments = path.split('/').reverse(); - let segment; - path = []; + if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { + newPath = `./${newPath}`; + } - while (segments.length !== 0) { - segment = segments.pop(); + return newPath; + } - switch (segment) { - case '.': - break; + normalizePath(path) { + const segments = path.split('/').reverse(); + let segment; + path = []; - case '..': - if (path.length === 0 || path[path.length - 1] === '..') { - path.push(segment); - } else { - path.pop(); - } + while (segments.length !== 0) { + segment = segments.pop(); - break; + switch (segment) { + case '.': + break; - default: - path.push(segment); - break; + case '..': + if (path.length === 0 || path[path.length - 1] === '..') { + path.push(segment); + } else { + path.pop(); + } + + break; + + default: + path.push(segment); + break; + } } + + return path.join('/'); } - return path.join('/'); }; -function isPathRelative(path) { - return !/^(?:[a-z-]+:|\/|#)/i.test(path); -} - -function isPathLocalRelative(path) { - return path.charAt(0) === '.'; -} // todo - do the same for the toCSS ? - function makeRegistry(base) { return { _data: {}, @@ -2145,12 +2166,10 @@ const defaultFunc = { this.value_ = this.error_ = null; } }; -var defaultFunc$1 = { - 'default': defaultFunc.eval.bind(defaultFunc) -}; class Ruleset extends Node { constructor(selectors, rules, strictImports, visibilityInfo) { + super(); this.selectors = selectors; this.rules = rules; this._lookups = {}; @@ -2189,7 +2208,7 @@ class Ruleset extends Node { if (this.selectors && (selCnt = this.selectors.length)) { selectors = new Array(selCnt); - defaultFunc$1.error({ + defaultFunc.error({ type: 'Syntax', message: 'it is currently only allowed in parametric mixin guards,' }); @@ -2226,7 +2245,7 @@ class Ruleset extends Node { }); } - defaultFunc$1.reset(); + defaultFunc.reset(); } else { hasOnePassingSelector = true; } @@ -3020,6 +3039,7 @@ Ruleset.prototype.isRuleset = true; class AtRule extends Node { constructor(name, value, rules, index, currentFileInfo, debugInfo, isRooted, visibilityInfo) { + super(); let i; this.name = name; this.value = value instanceof Node ? value : value ? new Anonymous(value) : value; @@ -3179,6 +3199,7 @@ AtRule.prototype.type = 'AtRule'; class DetachedRuleset extends Node { constructor(ruleset, frames) { + super(); this.ruleset = ruleset; this.frames = frames; this.setParent(this.ruleset, this); @@ -3204,6 +3225,7 @@ DetachedRuleset.prototype.evalFirst = true; class Unit extends Node { constructor(numerator, denominator, backupUnit) { + super(); this.numerator = numerator ? copyArray(numerator).sort() : []; this.denominator = denominator ? copyArray(denominator).sort() : []; @@ -3346,6 +3368,7 @@ Unit.prototype.type = 'Unit'; class Dimension extends Node { constructor(value, unit) { + super(); this.value = parseFloat(value); if (isNaN(this.value)) { @@ -3418,7 +3441,7 @@ class Dimension extends Node { other = other.convertTo(this.unit.usedUnits()); if (context.strictUnits && other.unit.toString() !== unit.toString()) { - throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`); + throw new Error(`Incompatible units. Change the units or use the unit function. ` + `Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`); } value = this._operate(context, op, this.value, other.value); @@ -3523,6 +3546,7 @@ const MATH$1 = Math$1; class Operation extends Node { constructor(op, operands, isSpaced) { + super(); this.op = op.trim(); this.operands = operands; this.isSpaced = isSpaced; @@ -3589,6 +3613,7 @@ const MATH$2 = Math$1; class Expression extends Node { constructor(value, noSpacing) { + super(); this.value = value; this.noSpacing = noSpacing; @@ -3712,6 +3737,7 @@ class functionCaller { class Call extends Node { constructor(name, args, index, currentFileInfo) { + super(); this.name = name; this.args = args; this.calc = name === 'calc'; @@ -3811,6 +3837,7 @@ Call.prototype.type = 'Call'; class Variable extends Node { constructor(name, index, currentFileInfo) { + super(); this.name = name; this._index = index; this._fileInfo = currentFileInfo; @@ -3883,6 +3910,7 @@ Variable.prototype.type = 'Variable'; class Property extends Node { constructor(name, index, currentFileInfo) { + super(); this.name = name; this._index = index; this._fileInfo = currentFileInfo; @@ -3958,6 +3986,7 @@ Property.prototype.type = 'Property'; class Attribute extends Node { constructor(key, op, value) { + super(); this.key = key; this.op = op; this.value = value; @@ -3988,6 +4017,7 @@ Attribute.prototype.type = 'Attribute'; class Quoted extends Node { constructor(str, content, escaped, index, currentFileInfo) { + super(); this.escaped = escaped == null ? true : escaped; this.value = content || ''; this.quote = str.charAt(0); @@ -4058,6 +4088,7 @@ Quoted.prototype.type = 'Quoted'; class URL extends Node { constructor(val, index, currentFileInfo, isEvald) { + super(); this.value = val; this._index = index; this._fileInfo = currentFileInfo; @@ -4120,6 +4151,7 @@ function escapePath(path) { class Media extends AtRule { constructor(value, features, index, currentFileInfo, visibilityInfo) { + super(); this._index = index; this._fileInfo = currentFileInfo; const selectors = new Selector([], null, null, this._index, this._fileInfo).createEmptySelectors(); @@ -4270,6 +4302,7 @@ Media.prototype.type = 'Media'; class Import extends Node { constructor(path, features, options, index, currentFileInfo, visibilityInfo) { + super(); this.options = options; this._index = index; this._fileInfo = currentFileInfo; @@ -4439,72 +4472,72 @@ class Import extends Node { Import.prototype.type = 'Import'; -const JsEvalNode = () => {}; +class JsEvalNode extends Node { + evaluateJavaScript(expression, context) { + let result; + const that = this; + const evalContext = {}; -JsEvalNode.prototype = new Node(); + if (!context.javascriptEnabled) { + throw { + message: 'Inline JavaScript is not enabled. Is it set in your options?', + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } -JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { - let result; - const that = this; - const evalContext = {}; + expression = expression.replace(/@\{([\w-]+)\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context))); - if (!context.javascriptEnabled) { - throw { - message: 'Inline JavaScript is not enabled. Is it set in your options?', - filename: this.fileInfo().filename, - index: this.getIndex() - }; - } + try { + expression = new Function(`return (${expression})`); + } catch (e) { + throw { + message: `JavaScript evaluation error: ${e.message} from \`${expression}\``, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } - expression = expression.replace(/@\{([\w-]+)\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context))); + const variables = context.frames[0].variables(); - try { - expression = new Function(`return (${expression})`); - } catch (e) { - throw { - message: `JavaScript evaluation error: ${e.message} from \`${expression}\``, - filename: this.fileInfo().filename, - index: this.getIndex() - }; - } - - const variables = context.frames[0].variables(); + for (const k in variables) { + if (variables.hasOwnProperty(k)) { + /* jshint loopfunc:true */ + evalContext[k.slice(1)] = { + value: variables[k].value, + toJS: function toJS() { + return this.value.eval(context).toCSS(); + } + }; + } + } - for (const k in variables) { - if (variables.hasOwnProperty(k)) { - /* jshint loopfunc:true */ - evalContext[k.slice(1)] = { - value: variables[k].value, - toJS: function toJS() { - return this.value.eval(context).toCSS(); - } + try { + result = expression.call(evalContext); + } catch (e) { + throw { + message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/["]/g, '\'')}'`, + filename: this.fileInfo().filename, + index: this.getIndex() }; } - } - try { - result = expression.call(evalContext); - } catch (e) { - throw { - message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/["]/g, '\'')}'`, - filename: this.fileInfo().filename, - index: this.getIndex() - }; + return result; } - return result; -}; - -JsEvalNode.prototype.jsify = obj => { - if (Array.isArray(obj.value) && obj.value.length > 1) { - return `[${obj.value.map(v => v.toCSS()).join(', ')}]`; - } else { - return obj.toCSS(); + jsify(obj) { + if (Array.isArray(obj.value) && obj.value.length > 1) { + return `[${obj.value.map(v => v.toCSS()).join(', ')}]`; + } else { + return obj.toCSS(); + } } -}; + +} class JavaScript extends JsEvalNode { constructor(string, escaped, index, currentFileInfo) { + super(); this.escaped = escaped; this.expression = string; this._index = index; @@ -4532,6 +4565,7 @@ JavaScript.prototype.type = 'JavaScript'; class Assignment extends Node { constructor(key, val) { + super(); this.key = key; this.value = val; } @@ -4564,6 +4598,7 @@ Assignment.prototype.type = 'Assignment'; class Condition extends Node { constructor(op, l, r, i, negate) { + super(); this.op = op.trim(); this.lvalue = l; this.rvalue = r; @@ -4612,6 +4647,7 @@ Condition.prototype.type = 'Condition'; class UnicodeDescriptor extends Node { constructor(value) { + super(); this.value = value; } @@ -4621,6 +4657,7 @@ UnicodeDescriptor.prototype.type = 'UnicodeDescriptor'; class Negative extends Node { constructor(node) { + super(); this.value = node; } @@ -4643,6 +4680,7 @@ Negative.prototype.type = 'Negative'; class Extend extends Node { constructor(selector, option, index, currentFileInfo, visibilityInfo) { + super(); this.selector = selector; this.option = option; this.object_id = Extend.next_id++; @@ -4707,6 +4745,7 @@ Extend.prototype.type = 'Extend'; class VariableCall extends Node { constructor(variable, index, currentFileInfo) { + super(); this.variable = variable; this._index = index; this._fileInfo = currentFileInfo; @@ -4747,6 +4786,7 @@ VariableCall.prototype.type = 'VariableCall'; class NamespaceValue extends Node { constructor(ruleCall, lookups, important, index, fileInfo) { + super(); this.value = ruleCall; this.lookups = lookups; this.important = important; @@ -4833,6 +4873,7 @@ NamespaceValue.prototype.type = 'NamespaceValue'; class Definition extends Ruleset { constructor(name, params, rules, condition, variadic, frames, visibilityInfo) { + super(); this.name = name || 'anonymous mixin'; this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])]; this.params = params; @@ -5070,6 +5111,7 @@ Definition.prototype.evalFirst = true; class MixinCall extends Node { constructor(elements, args, index, currentFileInfo, important) { + super(); this.selector = new Selector(elements); this.arguments = args || []; this._index = index; @@ -5123,7 +5165,7 @@ class MixinCall extends Node { for (f = 0; f < 2; f++) { conditionResult[f] = true; - defaultFunc$1.value(f); + defaultFunc.value(f); for (p = 0; p < mixinPath.length && conditionResult[f]; p++) { namespace = mixinPath[p]; @@ -5208,7 +5250,7 @@ class MixinCall extends Node { } } - defaultFunc$1.reset(); + defaultFunc.reset(); count = [0, 0, 0]; for (m = 0; m < candidates.length; m++) { @@ -11248,7 +11290,7 @@ var Functions = (environment => { }; // register functions functionRegistry.addMultiple(boolean$1); - functionRegistry.addMultiple(defaultFunc$1); + functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc)); functionRegistry.addMultiple(color); functionRegistry.addMultiple(colorBlend); functionRegistry.addMultiple(dataUri(environment)); @@ -11637,7 +11679,7 @@ var parseTree = (SourceMapBuilder => { const compress = Boolean(options.compress); if (compress) { - logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); + logger.warn('The compress option has been deprecated. ' + 'We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); } const toCSSOptions = { @@ -12089,13 +12131,13 @@ class PluginManager { let pm; -const PluginManagerFactory = (less, newFactory) => { +function PluginManagerFactory(less, newFactory) { if (newFactory || !pm) { pm = new PluginManager(less); } return pm; -}; // +} var Parse = ((environment, ParseTree, ImportManager) => { const parse = function parse(input, options, callback) { @@ -12179,22 +12221,34 @@ var Parse = ((environment, ParseTree, ImportManager) => { }); var createFromEnvironment = ((environment, fileManagers) => { + /** + * @todo + * This original code could be improved quite a bit. + * Many classes / modules currently add side-effects / mutations to passed in objects, + * which makes it hard to refactor and reason about. + */ + environment = new environment$1(environment, fileManagers); const SourceMapOutput = sourceMapOutput(environment); const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment); const ParseTree = parseTree(SourceMapBuilder); const ImportManager = importManager(environment); const render = Render(environment, ParseTree); const parse = Parse(environment, ParseTree, ImportManager); - const environ = new environment$1(environment, fileManagers); const functions = Functions(environment); + /** + * @todo + * This root properties / methods need to be organized. + * It's not clear what should / must be public and why. + */ + const initial = { - version: [3, 9, 0], + version: [3, 10, 0], data, tree, Environment: environment$1, - AbstractFileManager: abstractFileManager, + AbstractFileManager, AbstractPluginLoader, - environment: environ, + environment, visitors, Parser, functions, @@ -12207,15 +12261,13 @@ var createFromEnvironment = ((environment, fileManagers) => { parse, LessError, transformTree, - utils: utils$1, + utils, PluginManager: PluginManagerFactory, logger }; // Create a public API const ctor = t => function (...args) { - const obj = Object.create(t.prototype); - t.apply(obj, Array.prototype.slice.call(args, 0)); - return obj; + return new t(...args); }; let t; @@ -12343,6 +12395,7 @@ var lesscHelper = createCommonjsModule(function (module, exports) { class PluginLoader extends AbstractPluginLoader { constructor(less) { + super(); this.less = less; this.require = prefix => { @@ -12392,64 +12445,60 @@ var defaultOptions = (() => ({ depends: false, /* (DEPRECATED) Compress using less built-in compression. - * This does an okay job but does not utilise all the tricks of - * dedicated css compression. */ + * This does an okay job but does not utilise all the tricks of + * dedicated css compression. */ compress: false, /* Runs the less parser and just reports errors without any output. */ lint: false, /* Sets available include paths. - * If the file in an @import rule does not exist at that exact location, - * less will look for it at the location(s) passed to this option. - * You might use this for instance to specify a path to a library which - * you want to be referenced simply and relatively in the less files. */ + * If the file in an @import rule does not exist at that exact location, + * less will look for it at the location(s) passed to this option. + * You might use this for instance to specify a path to a library which + * you want to be referenced simply and relatively in the less files. */ paths: [], /* color output in the terminal */ color: true, /* The strictImports controls whether the compiler will allow an @import inside of either - * @media blocks or (a later addition) other selector blocks. - * See: https://github.com/less/less.js/issues/656 */ + * @media blocks or (a later addition) other selector blocks. + * See: https://github.com/less/less.js/issues/656 */ strictImports: false, /* Allow Imports from Insecure HTTPS Hosts */ insecure: false, /* Allows you to add a path to every generated import and url in your css. - * This does not affect less import statements that are processed, just ones - * that are left in the output css. */ + * This does not affect less import statements that are processed, just ones + * that are left in the output css. */ rootpath: '', /* By default URLs are kept as-is, so if you import a file in a sub-directory - * that references an image, exactly the same URL will be output in the css. - * This option allows you to re-write URL's in imported files so that the - * URL is always relative to the base imported file */ + * that references an image, exactly the same URL will be output in the css. + * This option allows you to re-write URL's in imported files so that the + * URL is always relative to the base imported file */ rewriteUrls: false, - /* Compatibility with IE8. Used for limiting data-uri length */ - // true until 3.0 - ieCompat: false, - /* How to process math - * 0 always - eagerly try to solve all operations - * 1 parens-division - require parens for division "/" - * 2 parens | strict - require parens for all operations - * 3 strict-legacy - legacy strict behavior (super-strict) - */ + * 0 always - eagerly try to solve all operations + * 1 parens-division - require parens for division "/" + * 2 parens | strict - require parens for all operations + * 3 strict-legacy - legacy strict behavior (super-strict) + */ math: 0, /* Without this option, less attempts to guess at the output unit when it does maths. */ strictUnits: false, /* Effectively the declaration is put at the top of your base Less file, - * meaning it can be used but it also can be overridden if this variable - * is defined in the file. */ + * meaning it can be used but it also can be overridden if this variable + * is defined in the file. */ globalVars: null, /* As opposed to the global variable option, this puts the declaration at the - * end of your base file, meaning it will override anything defined in your Less file. */ + * end of your base file, meaning it will override anything defined in your Less file. */ modifyVars: null, /* This option allows you to specify a argument to go on to every URL. */ @@ -12954,10 +13003,6 @@ function processPluginQueue() { options.color = false; break; - case 'ie-compat': - options.ieCompat = true; - break; - case 'js': options.javascriptEnabled = true; break; diff --git a/build/rollup.js b/build/rollup.js index 152cbaa21..5148e046b 100644 --- a/build/rollup.js +++ b/build/rollup.js @@ -119,7 +119,7 @@ async function buildLessC() { ] }); - const file = args.out || './dist/less.cjs.js' + const file = args.out || './bin/lessc' console.log(`Writing ${file}...`); await bundle.write({ diff --git a/dist/less.cjs.js b/dist/less.cjs.js index 51102a859..41b017427 100644 --- a/dist/less.cjs.js +++ b/dist/less.cjs.js @@ -1,12 +1,8 @@ 'use strict'; -function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; } - -var mime = _interopDefault(require('mime')); -var sourceMap = _interopDefault(require('source-map')); -var path = _interopDefault(require('path')); -var url = _interopDefault(require('url')); -var CloneHelper = _interopDefault(require('clone')); +var path = require('path'); +var url = require('url'); +var CloneHelper = require('clone'); var environment = { encodeBase64: function encodeBase64(str) { @@ -15,13 +11,13 @@ var environment = { return buffer.toString('base64'); }, mimeLookup: function mimeLookup(filename) { - return mime.lookup(filename); + return require('mime').lookup(filename); }, charsetLookup: function charsetLookup(mime) { - return mime.charsets.lookup(mime); + return require('mime').charsets.lookup(mime); }, getSourceMapGenerator: function getSourceMapGenerator() { - return sourceMap.SourceMapGenerator; + return require('source-map').SourceMapGenerator; } }; @@ -35,143 +31,153 @@ try { var fs$1 = fs; -const abstractFileManager = () => {}; +class AbstractFileManager { + getPath(filename) { + let j = filename.lastIndexOf('?'); -abstractFileManager.prototype.getPath = filename => { - let j = filename.lastIndexOf('?'); + if (j > 0) { + filename = filename.slice(0, j); + } - if (j > 0) { - filename = filename.slice(0, j); - } + j = filename.lastIndexOf('/'); - j = filename.lastIndexOf('/'); + if (j < 0) { + j = filename.lastIndexOf('\\'); + } - if (j < 0) { - j = filename.lastIndexOf('\\'); - } + if (j < 0) { + return ''; + } - if (j < 0) { - return ''; + return filename.slice(0, j + 1); } - return filename.slice(0, j + 1); -}; + tryAppendExtension(path, ext) { + return /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + } -abstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + tryAppendLessExtension(path) { + return this.tryAppendExtension(path, '.less'); + } -abstractFileManager.prototype.tryAppendLessExtension = function (path) { - return this.tryAppendExtension(path, '.less'); -}; + supportsSync() { + return false; + } -abstractFileManager.prototype.supportsSync = () => false; + alwaysMakePathsAbsolute() { + return false; + } -abstractFileManager.prototype.alwaysMakePathsAbsolute = () => false; + isPathAbsolute(filename) { + return /^(?:[a-z-]+:|\/|\\|#)/i.test(filename); + } // TODO: pull out / replace? -abstractFileManager.prototype.isPathAbsolute = filename => /^(?:[a-z-]+:|\/|\\|#)/i.test(filename); // TODO: pull out / replace? + join(basePath, laterPath) { + if (!basePath) { + return laterPath; + } -abstractFileManager.prototype.join = (basePath, laterPath) => { - if (!basePath) { - return laterPath; + return basePath + laterPath; } - return basePath + laterPath; -}; - -abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { - // diff between two paths to create a relative path - const urlParts = this.extractUrlParts(url); - const baseUrlParts = this.extractUrlParts(baseUrl); - let i; - let max; - let urlDirectories; - let baseUrlDirectories; - let diff = ''; + pathDiff(url, baseUrl) { + // diff between two paths to create a relative path + const urlParts = this.extractUrlParts(url); + const baseUrlParts = this.extractUrlParts(baseUrl); + let i; + let max; + let urlDirectories; + let baseUrlDirectories; + let diff = ''; - if (urlParts.hostPart !== baseUrlParts.hostPart) { - return ''; - } + if (urlParts.hostPart !== baseUrlParts.hostPart) { + return ''; + } - max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); + max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); - for (i = 0; i < max; i++) { - if (baseUrlParts.directories[i] !== urlParts.directories[i]) { - break; + for (i = 0; i < max; i++) { + if (baseUrlParts.directories[i] !== urlParts.directories[i]) { + break; + } } - } - baseUrlDirectories = baseUrlParts.directories.slice(i); - urlDirectories = urlParts.directories.slice(i); - - for (i = 0; i < baseUrlDirectories.length - 1; i++) { - diff += '../'; - } + baseUrlDirectories = baseUrlParts.directories.slice(i); + urlDirectories = urlParts.directories.slice(i); - for (i = 0; i < urlDirectories.length - 1; i++) { - diff += `${urlDirectories[i]}/`; - } + for (i = 0; i < baseUrlDirectories.length - 1; i++) { + diff += '../'; + } - return diff; -}; // helper function, not part of API + for (i = 0; i < urlDirectories.length - 1; i++) { + diff += `${urlDirectories[i]}/`; + } + return diff; + } -abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) { - // urlParts[1] = protocol://hostname/ OR / - // urlParts[2] = / if path relative to host base - // urlParts[3] = directories - // urlParts[4] = filename - // urlParts[5] = parameters - const urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; - const urlParts = url.match(urlPartsRegex); - const returner = {}; - let rawDirectories = []; - const directories = []; - let i; - let baseUrlParts; + // helper function, not part of API + extractUrlParts(url, baseUrl) { + // urlParts[1] = protocol://hostname/ OR / + // urlParts[2] = / if path relative to host base + // urlParts[3] = directories + // urlParts[4] = filename + // urlParts[5] = parameters + const urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; + const urlParts = url.match(urlPartsRegex); + const returner = {}; + let rawDirectories = []; + const directories = []; + let i; + let baseUrlParts; - if (!urlParts) { - throw new Error(`Could not parse sheet href - '${url}'`); - } // Stylesheets in IE don't always return the full path + if (!urlParts) { + throw new Error(`Could not parse sheet href - '${url}'`); + } // Stylesheets in IE don't always return the full path - if (baseUrl && (!urlParts[1] || urlParts[2])) { - baseUrlParts = baseUrl.match(urlPartsRegex); + if (baseUrl && (!urlParts[1] || urlParts[2])) { + baseUrlParts = baseUrl.match(urlPartsRegex); - if (!baseUrlParts) { - throw new Error(`Could not parse page url - '${baseUrl}'`); - } + if (!baseUrlParts) { + throw new Error(`Could not parse page url - '${baseUrl}'`); + } - urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; + urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; - if (!urlParts[2]) { - urlParts[3] = baseUrlParts[3] + urlParts[3]; + if (!urlParts[2]) { + urlParts[3] = baseUrlParts[3] + urlParts[3]; + } } - } - if (urlParts[3]) { - rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); // collapse '..' and skip '.' + if (urlParts[3]) { + rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); // collapse '..' and skip '.' - for (i = 0; i < rawDirectories.length; i++) { - if (rawDirectories[i] === '..') { - directories.pop(); - } else if (rawDirectories[i] !== '.') { - directories.push(rawDirectories[i]); + for (i = 0; i < rawDirectories.length; i++) { + if (rawDirectories[i] === '..') { + directories.pop(); + } else if (rawDirectories[i] !== '.') { + directories.push(rawDirectories[i]); + } } } + + returner.hostPart = urlParts[1]; + returner.directories = directories; + returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); + returner.path = (urlParts[1] || '') + directories.join('/'); + returner.filename = urlParts[4]; + returner.fileUrl = returner.path + (urlParts[4] || ''); + returner.url = returner.fileUrl + (urlParts[5] || ''); + return returner; } - returner.hostPart = urlParts[1]; - returner.directories = directories; - returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); - returner.path = (urlParts[1] || '') + directories.join('/'); - returner.filename = urlParts[4]; - returner.fileUrl = returner.path + (urlParts[4] || ''); - returner.url = returner.fileUrl + (urlParts[5] || ''); - return returner; -}; +} -class FileManager extends abstractFileManager { +class FileManager extends AbstractFileManager { constructor() { + super(); this.contents = {}; } @@ -395,69 +401,70 @@ var logger = { const isUrlRe = /^(?:https?:)?\/\//i; let request; -const UrlFileManager = () => {}; - -UrlFileManager.prototype = new abstractFileManager(); - -UrlFileManager.prototype.supports = (filename, currentDirectory, options, environment) => isUrlRe.test(filename) || isUrlRe.test(currentDirectory); +class UrlFileManager extends AbstractFileManager { + supports(filename, currentDirectory, options, environment) { + return isUrlRe.test(filename) || isUrlRe.test(currentDirectory); + } -UrlFileManager.prototype.loadFile = (filename, currentDirectory, options, environment) => { - return new Promise((fulfill, reject) => { - if (request === undefined) { - try { - request = require('request'); - } catch (e) { - request = null; + loadFile(filename, currentDirectory, options, environment) { + return new Promise((fulfill, reject) => { + if (request === undefined) { + try { + request = require('request'); + } catch (e) { + request = null; + } } - } - if (!request) { - reject({ - type: 'File', - message: 'optional dependency \'request\' required to import over http(s)\n' - }); - return; - } - - let urlStr = isUrlRe.test(filename) ? filename : url.resolve(currentDirectory, filename); - const urlObj = url.parse(urlStr); - - if (!urlObj.protocol) { - urlObj.protocol = 'http'; - urlStr = urlObj.format(); - } - - request.get({ - uri: urlStr, - strictSSL: !options.insecure - }, (error, res, body) => { - if (error) { + if (!request) { reject({ type: 'File', - message: `resource '${urlStr}' gave this Error:\n ${error}\n` + message: 'optional dependency \'request\' required to import over http(s)\n' }); return; } - if (res && res.statusCode === 404) { - reject({ - type: 'File', - message: `resource '${urlStr}' was not found\n` - }); - return; - } + let urlStr = isUrlRe.test(filename) ? filename : url.resolve(currentDirectory, filename); + const urlObj = url.parse(urlStr); - if (!body) { - logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`); + if (!urlObj.protocol) { + urlObj.protocol = 'http'; + urlStr = urlObj.format(); } - fulfill({ - contents: body, - filename: urlStr + request.get({ + uri: urlStr, + strictSSL: !options.insecure + }, (error, res, body) => { + if (error) { + reject({ + type: 'File', + message: `resource '${urlStr}' gave this Error:\n ${error}\n` + }); + return; + } + + if (res && res.statusCode === 404) { + reject({ + type: 'File', + message: `resource '${urlStr}' was not found\n` + }); + return; + } + + if (!body) { + logger.warn(`Warning: Empty body (HTTP ${res.statusCode}) returned by "${urlStr}"`); + } + + fulfill({ + contents: body, + filename: urlStr + }); }); }); - }); -}; + } + +} var colors = { 'aliceblue': '#f0f8ff', @@ -836,6 +843,7 @@ Node.numericCompare = (a, b) => a < b ? -1 : a === b ? 0 : a > b ? 1 : undefined class Color extends Node { constructor(rgb, a, originalForm) { + super(); const self = this; // // The end goal here, is to parse the arguments // into an integer triplet, such as `128, 255, 0` @@ -1099,6 +1107,7 @@ Color.fromKeyword = keyword => { class Paren extends Node { constructor(node) { + super(); this.value = node; } @@ -1116,8 +1125,16 @@ class Paren extends Node { Paren.prototype.type = 'Paren'; +const _noSpaceCombinators = { + '': true, + ' ': true, + '|': true +}; + class Combinator extends Node { constructor(value) { + super(); + if (value === ' ') { this.value = ' '; this.emptyOrWhitespace = true; @@ -1135,14 +1152,10 @@ class Combinator extends Node { } Combinator.prototype.type = 'Combinator'; -const _noSpaceCombinators = { - '': true, - ' ': true, - '|': true -}; class Element extends Node { constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) { + super(); this.combinator = combinator instanceof Combinator ? combinator : new Combinator(combinator); if (typeof value === 'string') { @@ -1258,12 +1271,25 @@ function clone(obj) { return cloned; } +function defaults(obj1, obj2) { + let newObj = obj2 || {}; + + if (!obj2._defaults) { + newObj = {}; + const defaults = CloneHelper(obj1); + newObj._defaults = defaults; + const cloned = obj2 ? CloneHelper(obj2) : {}; + Object.assign(newObj, defaults, cloned); + } + + return newObj; +} function copyOptions(obj1, obj2) { if (obj2 && obj2._defaults) { return obj2; } - const opts = utils.defaults(obj1, obj2); + const opts = defaults(obj1, obj2); if (opts.strictMath) { opts.math = Math$1.STRICT_LEGACY; @@ -1312,19 +1338,6 @@ function copyOptions(obj1, obj2) { return opts; } -function defaults(obj1, obj2) { - let newObj = obj2 || {}; - - if (!obj2._defaults) { - newObj = {}; - const defaults = CloneHelper(obj1); - newObj._defaults = defaults; - const cloned = obj2 ? CloneHelper(obj2) : {}; - Object.assign(newObj, defaults, cloned); - } - - return newObj; -} function merge(obj1, obj2) { for (const prop in obj2) { if (obj2.hasOwnProperty(prop)) { @@ -1339,7 +1352,7 @@ function flattenArray(arr, result = []) { const value = arr[i]; if (Array.isArray(value)) { - utils.flattenArray(value, result); + flattenArray(value, result); } else { if (value !== undefined) { result.push(value); @@ -1350,12 +1363,12 @@ function flattenArray(arr, result = []) { return result; } -var utils$1 = /*#__PURE__*/Object.freeze({ +var utils = /*#__PURE__*/Object.freeze({ getLocation: getLocation, copyArray: copyArray, clone: clone, - copyOptions: copyOptions, defaults: defaults, + copyOptions: copyOptions, merge: merge, flattenArray: flattenArray }); @@ -1501,6 +1514,7 @@ LessError.prototype.toString = function (options = {}) { class Selector extends Node { constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) { + super(); this.extendList = extendList; this.condition = condition; this.evaldCondition = !condition; @@ -1638,6 +1652,8 @@ Selector.prototype.type = 'Selector'; class Value extends Node { constructor(value) { + super(); + if (!value) { throw new Error('Value requires an array argument'); } @@ -1681,6 +1697,7 @@ Value.prototype.type = 'Value'; class Keyword extends Node { constructor(value) { + super(); this.value = value; } @@ -1703,6 +1720,7 @@ Keyword.False = new Keyword('false'); class Anonymous extends Node { constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) { + super(); this.value = value; this._index = index; this._fileInfo = currentFileInfo; @@ -1740,6 +1758,7 @@ const MATH = Math$1; class Declaration extends Node { constructor(name, value, important, merge, index, currentFileInfo, inline, variable) { + super(); this.name = name; this.value = value instanceof Node ? value : new Value([value ? new Anonymous(value) : null]); this.important = important ? ` ${important.trim()}` : ''; @@ -1888,6 +1907,7 @@ debugInfo.asMediaQuery = ctx => { class Comment extends Node { constructor(value, isLineComment, index, currentFileInfo) { + super(); this.value = value; this.isLineComment = isLineComment; this._index = index; @@ -1958,7 +1978,6 @@ contexts.Parse = function (options) { const evalCopyProperties = ['paths', // additional include paths 'compress', // whether to compress -'ieCompat', // whether to enforce IE compatibility (IE8 data-uri) 'math', // whether math has to be within parenthesis 'strictUnits', // whether units need to evaluate correctly 'sourceMap', // whether to output a source map @@ -1970,121 +1989,123 @@ const evalCopyProperties = ['paths', // additional include paths 'rewriteUrls' // option - whether to adjust URL's to be relative ]; -contexts.Eval = function (options, frames) { - copyFromOriginal(options, this, evalCopyProperties); - - if (typeof this.paths === 'string') { - this.paths = [this.paths]; - } - - this.frames = frames || []; - this.importantScope = this.importantScope || []; -}; +function isPathRelative(path) { + return !/^(?:[a-z-]+:|\/|#)/i.test(path); +} -contexts.Eval.prototype.enterCalc = function () { - if (!this.calcStack) { - this.calcStack = []; - } +function isPathLocalRelative(path) { + return path.charAt(0) === '.'; +} - this.calcStack.push(true); - this.inCalc = true; -}; +contexts.Eval = class { + constructor(options, frames) { + copyFromOriginal(options, this, evalCopyProperties); -contexts.Eval.prototype.exitCalc = function () { - this.calcStack.pop(); + if (typeof this.paths === 'string') { + this.paths = [this.paths]; + } - if (!this.calcStack) { + this.frames = frames || []; + this.importantScope = this.importantScope || []; this.inCalc = false; + this.mathOn = true; } -}; -contexts.Eval.prototype.inParenthesis = function () { - if (!this.parensStack) { - this.parensStack = []; + enterCalc() { + if (!this.calcStack) { + this.calcStack = []; + } + + this.calcStack.push(true); + this.inCalc = true; } - this.parensStack.push(true); -}; + exitCalc() { + this.calcStack.pop(); -contexts.Eval.prototype.outOfParenthesis = function () { - this.parensStack.pop(); -}; + if (!this.calcStack) { + this.inCalc = false; + } + } -contexts.Eval.prototype.inCalc = false; -contexts.Eval.prototype.mathOn = true; + inParenthesis() { + if (!this.parensStack) { + this.parensStack = []; + } -contexts.Eval.prototype.isMathOn = function (op) { - if (!this.mathOn) { - return false; + this.parensStack.push(true); } - if (op === '/' && this.math !== Math$1.ALWAYS && (!this.parensStack || !this.parensStack.length)) { - return false; + outOfParenthesis() { + this.parensStack.pop(); } - if (this.math > Math$1.PARENS_DIVISION) { - return this.parensStack && this.parensStack.length; - } + isMathOn(op) { + if (!this.mathOn) { + return false; + } - return true; -}; + if (op === '/' && this.math !== Math$1.ALWAYS && (!this.parensStack || !this.parensStack.length)) { + return false; + } -contexts.Eval.prototype.pathRequiresRewrite = function (path) { - const isRelative = this.rewriteUrls === RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; - return isRelative(path); -}; + if (this.math > Math$1.PARENS_DIVISION) { + return this.parensStack && this.parensStack.length; + } -contexts.Eval.prototype.rewritePath = function (path, rootpath) { - let newPath; - rootpath = rootpath || ''; - newPath = this.normalizePath(rootpath + path); // If a path was explicit relative and the rootpath was not an absolute path - // we must ensure that the new path is also explicit relative. + return true; + } - if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { - newPath = `./${newPath}`; + pathRequiresRewrite(path) { + const isRelative = this.rewriteUrls === RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; + return isRelative(path); } - return newPath; -}; + rewritePath(path, rootpath) { + let newPath; + rootpath = rootpath || ''; + newPath = this.normalizePath(rootpath + path); // If a path was explicit relative and the rootpath was not an absolute path + // we must ensure that the new path is also explicit relative. -contexts.Eval.prototype.normalizePath = path => { - const segments = path.split('/').reverse(); - let segment; - path = []; + if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { + newPath = `./${newPath}`; + } - while (segments.length !== 0) { - segment = segments.pop(); + return newPath; + } - switch (segment) { - case '.': - break; + normalizePath(path) { + const segments = path.split('/').reverse(); + let segment; + path = []; - case '..': - if (path.length === 0 || path[path.length - 1] === '..') { - path.push(segment); - } else { - path.pop(); - } + while (segments.length !== 0) { + segment = segments.pop(); - break; + switch (segment) { + case '.': + break; - default: - path.push(segment); - break; + case '..': + if (path.length === 0 || path[path.length - 1] === '..') { + path.push(segment); + } else { + path.pop(); + } + + break; + + default: + path.push(segment); + break; + } } + + return path.join('/'); } - return path.join('/'); }; -function isPathRelative(path) { - return !/^(?:[a-z-]+:|\/|#)/i.test(path); -} - -function isPathLocalRelative(path) { - return path.charAt(0) === '.'; -} // todo - do the same for the toCSS ? - function makeRegistry(base) { return { _data: {}, @@ -2142,12 +2163,10 @@ const defaultFunc = { this.value_ = this.error_ = null; } }; -var defaultFunc$1 = { - 'default': defaultFunc.eval.bind(defaultFunc) -}; class Ruleset extends Node { constructor(selectors, rules, strictImports, visibilityInfo) { + super(); this.selectors = selectors; this.rules = rules; this._lookups = {}; @@ -2186,7 +2205,7 @@ class Ruleset extends Node { if (this.selectors && (selCnt = this.selectors.length)) { selectors = new Array(selCnt); - defaultFunc$1.error({ + defaultFunc.error({ type: 'Syntax', message: 'it is currently only allowed in parametric mixin guards,' }); @@ -2223,7 +2242,7 @@ class Ruleset extends Node { }); } - defaultFunc$1.reset(); + defaultFunc.reset(); } else { hasOnePassingSelector = true; } @@ -3017,6 +3036,7 @@ Ruleset.prototype.isRuleset = true; class AtRule extends Node { constructor(name, value, rules, index, currentFileInfo, debugInfo, isRooted, visibilityInfo) { + super(); let i; this.name = name; this.value = value instanceof Node ? value : value ? new Anonymous(value) : value; @@ -3176,6 +3196,7 @@ AtRule.prototype.type = 'AtRule'; class DetachedRuleset extends Node { constructor(ruleset, frames) { + super(); this.ruleset = ruleset; this.frames = frames; this.setParent(this.ruleset, this); @@ -3201,6 +3222,7 @@ DetachedRuleset.prototype.evalFirst = true; class Unit extends Node { constructor(numerator, denominator, backupUnit) { + super(); this.numerator = numerator ? copyArray(numerator).sort() : []; this.denominator = denominator ? copyArray(denominator).sort() : []; @@ -3343,6 +3365,7 @@ Unit.prototype.type = 'Unit'; class Dimension extends Node { constructor(value, unit) { + super(); this.value = parseFloat(value); if (isNaN(this.value)) { @@ -3415,7 +3438,7 @@ class Dimension extends Node { other = other.convertTo(this.unit.usedUnits()); if (context.strictUnits && other.unit.toString() !== unit.toString()) { - throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`); + throw new Error(`Incompatible units. Change the units or use the unit function. ` + `Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`); } value = this._operate(context, op, this.value, other.value); @@ -3520,6 +3543,7 @@ const MATH$1 = Math$1; class Operation extends Node { constructor(op, operands, isSpaced) { + super(); this.op = op.trim(); this.operands = operands; this.isSpaced = isSpaced; @@ -3586,6 +3610,7 @@ const MATH$2 = Math$1; class Expression extends Node { constructor(value, noSpacing) { + super(); this.value = value; this.noSpacing = noSpacing; @@ -3709,6 +3734,7 @@ class functionCaller { class Call extends Node { constructor(name, args, index, currentFileInfo) { + super(); this.name = name; this.args = args; this.calc = name === 'calc'; @@ -3808,6 +3834,7 @@ Call.prototype.type = 'Call'; class Variable extends Node { constructor(name, index, currentFileInfo) { + super(); this.name = name; this._index = index; this._fileInfo = currentFileInfo; @@ -3880,6 +3907,7 @@ Variable.prototype.type = 'Variable'; class Property extends Node { constructor(name, index, currentFileInfo) { + super(); this.name = name; this._index = index; this._fileInfo = currentFileInfo; @@ -3955,6 +3983,7 @@ Property.prototype.type = 'Property'; class Attribute extends Node { constructor(key, op, value) { + super(); this.key = key; this.op = op; this.value = value; @@ -3985,6 +4014,7 @@ Attribute.prototype.type = 'Attribute'; class Quoted extends Node { constructor(str, content, escaped, index, currentFileInfo) { + super(); this.escaped = escaped == null ? true : escaped; this.value = content || ''; this.quote = str.charAt(0); @@ -4055,6 +4085,7 @@ Quoted.prototype.type = 'Quoted'; class URL extends Node { constructor(val, index, currentFileInfo, isEvald) { + super(); this.value = val; this._index = index; this._fileInfo = currentFileInfo; @@ -4117,6 +4148,7 @@ function escapePath(path) { class Media extends AtRule { constructor(value, features, index, currentFileInfo, visibilityInfo) { + super(); this._index = index; this._fileInfo = currentFileInfo; const selectors = new Selector([], null, null, this._index, this._fileInfo).createEmptySelectors(); @@ -4267,6 +4299,7 @@ Media.prototype.type = 'Media'; class Import extends Node { constructor(path, features, options, index, currentFileInfo, visibilityInfo) { + super(); this.options = options; this._index = index; this._fileInfo = currentFileInfo; @@ -4436,72 +4469,72 @@ class Import extends Node { Import.prototype.type = 'Import'; -const JsEvalNode = () => {}; +class JsEvalNode extends Node { + evaluateJavaScript(expression, context) { + let result; + const that = this; + const evalContext = {}; -JsEvalNode.prototype = new Node(); + if (!context.javascriptEnabled) { + throw { + message: 'Inline JavaScript is not enabled. Is it set in your options?', + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } -JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { - let result; - const that = this; - const evalContext = {}; + expression = expression.replace(/@\{([\w-]+)\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context))); - if (!context.javascriptEnabled) { - throw { - message: 'Inline JavaScript is not enabled. Is it set in your options?', - filename: this.fileInfo().filename, - index: this.getIndex() - }; - } - - expression = expression.replace(/@\{([\w-]+)\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context))); + try { + expression = new Function(`return (${expression})`); + } catch (e) { + throw { + message: `JavaScript evaluation error: ${e.message} from \`${expression}\``, + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } - try { - expression = new Function(`return (${expression})`); - } catch (e) { - throw { - message: `JavaScript evaluation error: ${e.message} from \`${expression}\``, - filename: this.fileInfo().filename, - index: this.getIndex() - }; - } + const variables = context.frames[0].variables(); - const variables = context.frames[0].variables(); + for (const k in variables) { + if (variables.hasOwnProperty(k)) { + /* jshint loopfunc:true */ + evalContext[k.slice(1)] = { + value: variables[k].value, + toJS: function toJS() { + return this.value.eval(context).toCSS(); + } + }; + } + } - for (const k in variables) { - if (variables.hasOwnProperty(k)) { - /* jshint loopfunc:true */ - evalContext[k.slice(1)] = { - value: variables[k].value, - toJS: function toJS() { - return this.value.eval(context).toCSS(); - } + try { + result = expression.call(evalContext); + } catch (e) { + throw { + message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/["]/g, '\'')}'`, + filename: this.fileInfo().filename, + index: this.getIndex() }; } - } - try { - result = expression.call(evalContext); - } catch (e) { - throw { - message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/["]/g, '\'')}'`, - filename: this.fileInfo().filename, - index: this.getIndex() - }; + return result; } - return result; -}; - -JsEvalNode.prototype.jsify = obj => { - if (Array.isArray(obj.value) && obj.value.length > 1) { - return `[${obj.value.map(v => v.toCSS()).join(', ')}]`; - } else { - return obj.toCSS(); + jsify(obj) { + if (Array.isArray(obj.value) && obj.value.length > 1) { + return `[${obj.value.map(v => v.toCSS()).join(', ')}]`; + } else { + return obj.toCSS(); + } } -}; + +} class JavaScript extends JsEvalNode { constructor(string, escaped, index, currentFileInfo) { + super(); this.escaped = escaped; this.expression = string; this._index = index; @@ -4529,6 +4562,7 @@ JavaScript.prototype.type = 'JavaScript'; class Assignment extends Node { constructor(key, val) { + super(); this.key = key; this.value = val; } @@ -4561,6 +4595,7 @@ Assignment.prototype.type = 'Assignment'; class Condition extends Node { constructor(op, l, r, i, negate) { + super(); this.op = op.trim(); this.lvalue = l; this.rvalue = r; @@ -4609,6 +4644,7 @@ Condition.prototype.type = 'Condition'; class UnicodeDescriptor extends Node { constructor(value) { + super(); this.value = value; } @@ -4618,6 +4654,7 @@ UnicodeDescriptor.prototype.type = 'UnicodeDescriptor'; class Negative extends Node { constructor(node) { + super(); this.value = node; } @@ -4640,6 +4677,7 @@ Negative.prototype.type = 'Negative'; class Extend extends Node { constructor(selector, option, index, currentFileInfo, visibilityInfo) { + super(); this.selector = selector; this.option = option; this.object_id = Extend.next_id++; @@ -4704,6 +4742,7 @@ Extend.prototype.type = 'Extend'; class VariableCall extends Node { constructor(variable, index, currentFileInfo) { + super(); this.variable = variable; this._index = index; this._fileInfo = currentFileInfo; @@ -4744,6 +4783,7 @@ VariableCall.prototype.type = 'VariableCall'; class NamespaceValue extends Node { constructor(ruleCall, lookups, important, index, fileInfo) { + super(); this.value = ruleCall; this.lookups = lookups; this.important = important; @@ -4830,6 +4870,7 @@ NamespaceValue.prototype.type = 'NamespaceValue'; class Definition extends Ruleset { constructor(name, params, rules, condition, variadic, frames, visibilityInfo) { + super(); this.name = name || 'anonymous mixin'; this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])]; this.params = params; @@ -5067,6 +5108,7 @@ Definition.prototype.evalFirst = true; class MixinCall extends Node { constructor(elements, args, index, currentFileInfo, important) { + super(); this.selector = new Selector(elements); this.arguments = args || []; this._index = index; @@ -5120,7 +5162,7 @@ class MixinCall extends Node { for (f = 0; f < 2; f++) { conditionResult[f] = true; - defaultFunc$1.value(f); + defaultFunc.value(f); for (p = 0; p < mixinPath.length && conditionResult[f]; p++) { namespace = mixinPath[p]; @@ -5205,7 +5247,7 @@ class MixinCall extends Node { } } - defaultFunc$1.reset(); + defaultFunc.reset(); count = [0, 0, 0]; for (m = 0; m < candidates.length; m++) { @@ -11245,7 +11287,7 @@ var Functions = (environment => { }; // register functions functionRegistry.addMultiple(boolean$1); - functionRegistry.addMultiple(defaultFunc$1); + functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc)); functionRegistry.addMultiple(color); functionRegistry.addMultiple(colorBlend); functionRegistry.addMultiple(dataUri(environment)); @@ -11634,7 +11676,7 @@ var parseTree = (SourceMapBuilder => { const compress = Boolean(options.compress); if (compress) { - logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); + logger.warn('The compress option has been deprecated. ' + 'We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); } const toCSSOptions = { @@ -12086,13 +12128,13 @@ class PluginManager { let pm; -const PluginManagerFactory = (less, newFactory) => { +function PluginManagerFactory(less, newFactory) { if (newFactory || !pm) { pm = new PluginManager(less); } return pm; -}; // +} var Parse = ((environment, ParseTree, ImportManager) => { const parse = function parse(input, options, callback) { @@ -12176,22 +12218,34 @@ var Parse = ((environment, ParseTree, ImportManager) => { }); var createFromEnvironment = ((environment, fileManagers) => { + /** + * @todo + * This original code could be improved quite a bit. + * Many classes / modules currently add side-effects / mutations to passed in objects, + * which makes it hard to refactor and reason about. + */ + environment = new environment$1(environment, fileManagers); const SourceMapOutput = sourceMapOutput(environment); const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment); const ParseTree = parseTree(SourceMapBuilder); const ImportManager = importManager(environment); const render = Render(environment, ParseTree); const parse = Parse(environment, ParseTree, ImportManager); - const environ = new environment$1(environment, fileManagers); const functions = Functions(environment); + /** + * @todo + * This root properties / methods need to be organized. + * It's not clear what should / must be public and why. + */ + const initial = { - version: [3, 9, 0], + version: [3, 10, 0], data, tree, Environment: environment$1, - AbstractFileManager: abstractFileManager, + AbstractFileManager, AbstractPluginLoader, - environment: environ, + environment, visitors, Parser, functions, @@ -12204,15 +12258,13 @@ var createFromEnvironment = ((environment, fileManagers) => { parse, LessError, transformTree, - utils: utils$1, + utils, PluginManager: PluginManagerFactory, logger }; // Create a public API const ctor = t => function (...args) { - const obj = Object.create(t.prototype); - t.apply(obj, Array.prototype.slice.call(args, 0)); - return obj; + return new t(...args); }; let t; @@ -12340,6 +12392,7 @@ var lesscHelper = createCommonjsModule(function (module, exports) { class PluginLoader extends AbstractPluginLoader { constructor(less) { + super(); this.less = less; this.require = prefix => { @@ -12389,64 +12442,60 @@ var defaultOptions = (() => ({ depends: false, /* (DEPRECATED) Compress using less built-in compression. - * This does an okay job but does not utilise all the tricks of - * dedicated css compression. */ + * This does an okay job but does not utilise all the tricks of + * dedicated css compression. */ compress: false, /* Runs the less parser and just reports errors without any output. */ lint: false, /* Sets available include paths. - * If the file in an @import rule does not exist at that exact location, - * less will look for it at the location(s) passed to this option. - * You might use this for instance to specify a path to a library which - * you want to be referenced simply and relatively in the less files. */ + * If the file in an @import rule does not exist at that exact location, + * less will look for it at the location(s) passed to this option. + * You might use this for instance to specify a path to a library which + * you want to be referenced simply and relatively in the less files. */ paths: [], /* color output in the terminal */ color: true, /* The strictImports controls whether the compiler will allow an @import inside of either - * @media blocks or (a later addition) other selector blocks. - * See: https://github.com/less/less.js/issues/656 */ + * @media blocks or (a later addition) other selector blocks. + * See: https://github.com/less/less.js/issues/656 */ strictImports: false, /* Allow Imports from Insecure HTTPS Hosts */ insecure: false, /* Allows you to add a path to every generated import and url in your css. - * This does not affect less import statements that are processed, just ones - * that are left in the output css. */ + * This does not affect less import statements that are processed, just ones + * that are left in the output css. */ rootpath: '', /* By default URLs are kept as-is, so if you import a file in a sub-directory - * that references an image, exactly the same URL will be output in the css. - * This option allows you to re-write URL's in imported files so that the - * URL is always relative to the base imported file */ + * that references an image, exactly the same URL will be output in the css. + * This option allows you to re-write URL's in imported files so that the + * URL is always relative to the base imported file */ rewriteUrls: false, - /* Compatibility with IE8. Used for limiting data-uri length */ - // true until 3.0 - ieCompat: false, - /* How to process math - * 0 always - eagerly try to solve all operations - * 1 parens-division - require parens for division "/" - * 2 parens | strict - require parens for all operations - * 3 strict-legacy - legacy strict behavior (super-strict) - */ + * 0 always - eagerly try to solve all operations + * 1 parens-division - require parens for division "/" + * 2 parens | strict - require parens for all operations + * 3 strict-legacy - legacy strict behavior (super-strict) + */ math: 0, /* Without this option, less attempts to guess at the output unit when it does maths. */ strictUnits: false, /* Effectively the declaration is put at the top of your base Less file, - * meaning it can be used but it also can be overridden if this variable - * is defined in the file. */ + * meaning it can be used but it also can be overridden if this variable + * is defined in the file. */ globalVars: null, /* As opposed to the global variable option, this puts the declaration at the - * end of your base file, meaning it will override anything defined in your Less file. */ + * end of your base file, meaning it will override anything defined in your Less file. */ modifyVars: null, /* This option allows you to specify a argument to go on to every URL. */ diff --git a/dist/less.js b/dist/less.js index 872df8eac..c8cc1907e 100644 --- a/dist/less.js +++ b/dist/less.js @@ -1,5 +1,5 @@ /** - * Less - Leaner CSS v3.9.0 + * Less - Leaner CSS v3.10.0 * http://lesscss.org * * Copyright (c) 2009-2019, Alexis Sellier @@ -24,64 +24,60 @@ depends: false, /* (DEPRECATED) Compress using less built-in compression. - * This does an okay job but does not utilise all the tricks of - * dedicated css compression. */ + * This does an okay job but does not utilise all the tricks of + * dedicated css compression. */ compress: false, /* Runs the less parser and just reports errors without any output. */ lint: false, /* Sets available include paths. - * If the file in an @import rule does not exist at that exact location, - * less will look for it at the location(s) passed to this option. - * You might use this for instance to specify a path to a library which - * you want to be referenced simply and relatively in the less files. */ + * If the file in an @import rule does not exist at that exact location, + * less will look for it at the location(s) passed to this option. + * You might use this for instance to specify a path to a library which + * you want to be referenced simply and relatively in the less files. */ paths: [], /* color output in the terminal */ color: true, /* The strictImports controls whether the compiler will allow an @import inside of either - * @media blocks or (a later addition) other selector blocks. - * See: https://github.com/less/less.js/issues/656 */ + * @media blocks or (a later addition) other selector blocks. + * See: https://github.com/less/less.js/issues/656 */ strictImports: false, /* Allow Imports from Insecure HTTPS Hosts */ insecure: false, /* Allows you to add a path to every generated import and url in your css. - * This does not affect less import statements that are processed, just ones - * that are left in the output css. */ + * This does not affect less import statements that are processed, just ones + * that are left in the output css. */ rootpath: '', /* By default URLs are kept as-is, so if you import a file in a sub-directory - * that references an image, exactly the same URL will be output in the css. - * This option allows you to re-write URL's in imported files so that the - * URL is always relative to the base imported file */ + * that references an image, exactly the same URL will be output in the css. + * This option allows you to re-write URL's in imported files so that the + * URL is always relative to the base imported file */ rewriteUrls: false, - /* Compatibility with IE8. Used for limiting data-uri length */ - // true until 3.0 - ieCompat: false, - /* How to process math - * 0 always - eagerly try to solve all operations - * 1 parens-division - require parens for division "/" - * 2 parens | strict - require parens for all operations - * 3 strict-legacy - legacy strict behavior (super-strict) - */ + * 0 always - eagerly try to solve all operations + * 1 parens-division - require parens for division "/" + * 2 parens | strict - require parens for all operations + * 3 strict-legacy - legacy strict behavior (super-strict) + */ math: 0, /* Without this option, less attempts to guess at the output unit when it does maths. */ strictUnits: false, /* Effectively the declaration is put at the top of your base Less file, - * meaning it can be used but it also can be overridden if this variable - * is defined in the file. */ + * meaning it can be used but it also can be overridden if this variable + * is defined in the file. */ globalVars: null, /* As opposed to the global variable option, this puts the declaration at the - * end of your base file, meaning it will override anything defined in your Less file. */ + * end of your base file, meaning it will override anything defined in your Less file. */ modifyVars: null, /* This option allows you to specify a argument to go on to every URL. */ @@ -211,6 +207,139 @@ } }); + function _typeof(obj) { + if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { + _typeof = function (obj) { + return typeof obj; + }; + } else { + _typeof = function (obj) { + return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; + }; + } + + return _typeof(obj); + } + + function _classCallCheck(instance, Constructor) { + if (!(instance instanceof Constructor)) { + throw new TypeError("Cannot call a class as a function"); + } + } + + function _defineProperties(target, props) { + for (var i = 0; i < props.length; i++) { + var descriptor = props[i]; + descriptor.enumerable = descriptor.enumerable || false; + descriptor.configurable = true; + if ("value" in descriptor) descriptor.writable = true; + Object.defineProperty(target, descriptor.key, descriptor); + } + } + + function _createClass(Constructor, protoProps, staticProps) { + if (protoProps) _defineProperties(Constructor.prototype, protoProps); + if (staticProps) _defineProperties(Constructor, staticProps); + return Constructor; + } + + function _inherits(subClass, superClass) { + if (typeof superClass !== "function" && superClass !== null) { + throw new TypeError("Super expression must either be null or a function"); + } + + subClass.prototype = Object.create(superClass && superClass.prototype, { + constructor: { + value: subClass, + writable: true, + configurable: true + } + }); + if (superClass) _setPrototypeOf(subClass, superClass); + } + + function _getPrototypeOf(o) { + _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { + return o.__proto__ || Object.getPrototypeOf(o); + }; + return _getPrototypeOf(o); + } + + function _setPrototypeOf(o, p) { + _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { + o.__proto__ = p; + return o; + }; + + return _setPrototypeOf(o, p); + } + + function isNativeReflectConstruct() { + if (typeof Reflect === "undefined" || !Reflect.construct) return false; + if (Reflect.construct.sham) return false; + if (typeof Proxy === "function") return true; + + try { + Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); + return true; + } catch (e) { + return false; + } + } + + function _construct(Parent, args, Class) { + if (isNativeReflectConstruct()) { + _construct = Reflect.construct; + } else { + _construct = function _construct(Parent, args, Class) { + var a = [null]; + a.push.apply(a, args); + var Constructor = Function.bind.apply(Parent, a); + var instance = new Constructor(); + if (Class) _setPrototypeOf(instance, Class.prototype); + return instance; + }; + } + + return _construct.apply(null, arguments); + } + + function _assertThisInitialized(self) { + if (self === void 0) { + throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); + } + + return self; + } + + function _possibleConstructorReturn(self, call) { + if (call && (typeof call === "object" || typeof call === "function")) { + return call; + } + + return _assertThisInitialized(self); + } + + function _toConsumableArray(arr) { + return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); + } + + function _arrayWithoutHoles(arr) { + if (Array.isArray(arr)) { + for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; + + return arr2; + } + } + + function _iterableToArray(iter) { + if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter); + } + + function _nonIterableSpread() { + throw new TypeError("Invalid attempt to spread non-iterable instance"); + } + var colors = { 'aliceblue': '#f0f8ff', 'antiquewhite': '#faebd7', @@ -389,102 +518,6 @@ unitConversions: unitConversions }; - function _typeof(obj) { - if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { - _typeof = function (obj) { - return typeof obj; - }; - } else { - _typeof = function (obj) { - return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; - }; - } - - return _typeof(obj); - } - - function _classCallCheck(instance, Constructor) { - if (!(instance instanceof Constructor)) { - throw new TypeError("Cannot call a class as a function"); - } - } - - function _defineProperties(target, props) { - for (var i = 0; i < props.length; i++) { - var descriptor = props[i]; - descriptor.enumerable = descriptor.enumerable || false; - descriptor.configurable = true; - if ("value" in descriptor) descriptor.writable = true; - Object.defineProperty(target, descriptor.key, descriptor); - } - } - - function _createClass(Constructor, protoProps, staticProps) { - if (protoProps) _defineProperties(Constructor.prototype, protoProps); - if (staticProps) _defineProperties(Constructor, staticProps); - return Constructor; - } - - function _inherits(subClass, superClass) { - if (typeof superClass !== "function" && superClass !== null) { - throw new TypeError("Super expression must either be null or a function"); - } - - subClass.prototype = Object.create(superClass && superClass.prototype, { - constructor: { - value: subClass, - writable: true, - configurable: true - } - }); - if (superClass) _setPrototypeOf(subClass, superClass); - } - - function _setPrototypeOf(o, p) { - _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { - o.__proto__ = p; - return o; - }; - - return _setPrototypeOf(o, p); - } - - function _assertThisInitialized(self) { - if (self === void 0) { - throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); - } - - return self; - } - - function _possibleConstructorReturn(self, call) { - if (call && (typeof call === "object" || typeof call === "function")) { - return call; - } - - return _assertThisInitialized(self); - } - - function _toConsumableArray(arr) { - return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); - } - - function _arrayWithoutHoles(arr) { - if (Array.isArray(arr)) { - for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; - - return arr2; - } - } - - function _iterableToArray(iter) { - if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter); - } - - function _nonIterableSpread() { - throw new TypeError("Invalid attempt to spread non-iterable instance"); - } - var Node = /*#__PURE__*/ function () { @@ -719,6 +752,8 @@ _classCallCheck(this, Color); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Color).call(this)); + var self = _assertThisInitialized(_this); // // The end goal here, is to parse the arguments // into an integer triplet, such as `128, 255, 0` @@ -755,7 +790,7 @@ _this.value = originalForm; } - return _possibleConstructorReturn(_this); + return _this; } _createClass(Color, [{ @@ -1007,8 +1042,9 @@ _classCallCheck(this, Paren); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Paren).call(this)); _this.value = node; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Paren, [{ @@ -1030,6 +1066,12 @@ Paren.prototype.type = 'Paren'; + var _noSpaceCombinators = { + '': true, + ' ': true, + '|': true + }; + var Combinator = /*#__PURE__*/ function (_Node) { @@ -1040,6 +1082,8 @@ _classCallCheck(this, Combinator); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Combinator).call(this)); + if (value === ' ') { _this.value = ' '; _this.emptyOrWhitespace = true; @@ -1048,7 +1092,7 @@ _this.emptyOrWhitespace = _this.value === ''; } - return _possibleConstructorReturn(_this); + return _this; } _createClass(Combinator, [{ @@ -1063,11 +1107,6 @@ }(Node); Combinator.prototype.type = 'Combinator'; - var _noSpaceCombinators = { - '': true, - ' ': true, - '|': true - }; var Element = /*#__PURE__*/ @@ -1079,6 +1118,7 @@ _classCallCheck(this, Element); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Element).call(this)); _this.combinator = combinator instanceof Combinator ? combinator : new Combinator(combinator); if (typeof value === 'string') { @@ -1097,7 +1137,7 @@ _this.setParent(_this.combinator, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(Element, [{ @@ -1470,12 +1510,27 @@ return cloned; } + function defaults(obj1, obj2) { + var newObj = obj2 || {}; + + if (!obj2._defaults) { + newObj = {}; + + var _defaults = clone_1(obj1); + + newObj._defaults = _defaults; + var cloned = obj2 ? clone_1(obj2) : {}; + Object.assign(newObj, _defaults, cloned); + } + + return newObj; + } function copyOptions(obj1, obj2) { if (obj2 && obj2._defaults) { return obj2; } - var opts = utils.defaults(obj1, obj2); + var opts = defaults(obj1, obj2); if (opts.strictMath) { opts.math = Math$1.STRICT_LEGACY; @@ -1524,21 +1579,6 @@ return opts; } - function defaults(obj1, obj2) { - var newObj = obj2 || {}; - - if (!obj2._defaults) { - newObj = {}; - - var _defaults = clone_1(obj1); - - newObj._defaults = _defaults; - var cloned = obj2 ? clone_1(obj2) : {}; - Object.assign(newObj, _defaults, cloned); - } - - return newObj; - } function merge(obj1, obj2) { for (var prop in obj2) { if (obj2.hasOwnProperty(prop)) { @@ -1555,7 +1595,7 @@ var value = arr[i]; if (Array.isArray(value)) { - utils.flattenArray(value, result); + flattenArray(value, result); } else { if (value !== undefined) { result.push(value); @@ -1566,12 +1606,12 @@ return result; } - var utils$1 = /*#__PURE__*/Object.freeze({ + var utils = /*#__PURE__*/Object.freeze({ getLocation: getLocation, copyArray: copyArray, clone: clone, - copyOptions: copyOptions, defaults: defaults, + copyOptions: copyOptions, merge: merge, flattenArray: flattenArray }); @@ -1728,6 +1768,7 @@ _classCallCheck(this, Selector); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Selector).call(this)); _this.extendList = extendList; _this.condition = condition; _this.evaldCondition = !condition; @@ -1740,7 +1781,7 @@ _this.setParent(_this.elements, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(Selector, [{ @@ -1896,6 +1937,8 @@ _classCallCheck(this, Value); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Value).call(this)); + if (!value) { throw new Error('Value requires an array argument'); } @@ -1906,7 +1949,7 @@ _this.value = value; } - return _possibleConstructorReturn(_this); + return _this; } _createClass(Value, [{ @@ -1957,8 +2000,9 @@ _classCallCheck(this, Keyword); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Keyword).call(this)); _this.value = value; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Keyword, [{ @@ -1992,6 +2036,7 @@ _classCallCheck(this, Anonymous); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Anonymous).call(this)); _this.value = value; _this._index = index; _this._fileInfo = currentFileInfo; @@ -2001,7 +2046,7 @@ _this.copyVisibilityInfo(visibilityInfo); - return _possibleConstructorReturn(_this); + return _this; } _createClass(Anonymous, [{ @@ -2047,6 +2092,7 @@ _classCallCheck(this, Declaration); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Declaration).call(this)); _this.name = name; _this.value = value instanceof Node ? value : new Value([value ? new Anonymous(value) : null]); _this.important = important ? " ".concat(important.trim()) : ''; @@ -2059,7 +2105,7 @@ _this.setParent(_this.value, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(Declaration, [{ @@ -2214,12 +2260,13 @@ _classCallCheck(this, Comment); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Comment).call(this)); _this.value = value; _this.isLineComment = isLineComment; _this._index = index; _this._fileInfo = currentFileInfo; _this.allowRoot = true; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Comment, [{ @@ -2290,7 +2337,6 @@ var evalCopyProperties = ['paths', // additional include paths 'compress', // whether to compress - 'ieCompat', // whether to enforce IE compatibility (IE8 data-uri) 'math', // whether math has to be within parenthesis 'strictUnits', // whether units need to evaluate correctly 'sourceMap', // whether to output a source map @@ -2302,120 +2348,137 @@ 'rewriteUrls' // option - whether to adjust URL's to be relative ]; - contexts.Eval = function (options, frames) { - copyFromOriginal(options, this, evalCopyProperties); - - if (typeof this.paths === 'string') { - this.paths = [this.paths]; - } + function isPathRelative(path) { + return !/^(?:[a-z-]+:|\/|#)/i.test(path); + } - this.frames = frames || []; - this.importantScope = this.importantScope || []; - }; + function isPathLocalRelative(path) { + return path.charAt(0) === '.'; + } - contexts.Eval.prototype.enterCalc = function () { - if (!this.calcStack) { - this.calcStack = []; - } + contexts.Eval = + /*#__PURE__*/ + function () { + function _class(options, frames) { + _classCallCheck(this, _class); - this.calcStack.push(true); - this.inCalc = true; - }; + copyFromOriginal(options, this, evalCopyProperties); - contexts.Eval.prototype.exitCalc = function () { - this.calcStack.pop(); + if (typeof this.paths === 'string') { + this.paths = [this.paths]; + } - if (!this.calcStack) { + this.frames = frames || []; + this.importantScope = this.importantScope || []; this.inCalc = false; + this.mathOn = true; } - }; - contexts.Eval.prototype.inParenthesis = function () { - if (!this.parensStack) { - this.parensStack = []; - } - - this.parensStack.push(true); - }; - - contexts.Eval.prototype.outOfParenthesis = function () { - this.parensStack.pop(); - }; + _createClass(_class, [{ + key: "enterCalc", + value: function enterCalc() { + if (!this.calcStack) { + this.calcStack = []; + } - contexts.Eval.prototype.inCalc = false; - contexts.Eval.prototype.mathOn = true; + this.calcStack.push(true); + this.inCalc = true; + } + }, { + key: "exitCalc", + value: function exitCalc() { + this.calcStack.pop(); - contexts.Eval.prototype.isMathOn = function (op) { - if (!this.mathOn) { - return false; - } + if (!this.calcStack) { + this.inCalc = false; + } + } + }, { + key: "inParenthesis", + value: function inParenthesis() { + if (!this.parensStack) { + this.parensStack = []; + } - if (op === '/' && this.math !== Math$1.ALWAYS && (!this.parensStack || !this.parensStack.length)) { - return false; - } + this.parensStack.push(true); + } + }, { + key: "outOfParenthesis", + value: function outOfParenthesis() { + this.parensStack.pop(); + } + }, { + key: "isMathOn", + value: function isMathOn(op) { + if (!this.mathOn) { + return false; + } - if (this.math > Math$1.PARENS_DIVISION) { - return this.parensStack && this.parensStack.length; - } + if (op === '/' && this.math !== Math$1.ALWAYS && (!this.parensStack || !this.parensStack.length)) { + return false; + } - return true; - }; + if (this.math > Math$1.PARENS_DIVISION) { + return this.parensStack && this.parensStack.length; + } - contexts.Eval.prototype.pathRequiresRewrite = function (path) { - var isRelative = this.rewriteUrls === RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; - return isRelative(path); - }; + return true; + } + }, { + key: "pathRequiresRewrite", + value: function pathRequiresRewrite(path) { + var isRelative = this.rewriteUrls === RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative; + return isRelative(path); + } + }, { + key: "rewritePath", + value: function rewritePath(path, rootpath) { + var newPath; + rootpath = rootpath || ''; + newPath = this.normalizePath(rootpath + path); // If a path was explicit relative and the rootpath was not an absolute path + // we must ensure that the new path is also explicit relative. - contexts.Eval.prototype.rewritePath = function (path, rootpath) { - var newPath; - rootpath = rootpath || ''; - newPath = this.normalizePath(rootpath + path); // If a path was explicit relative and the rootpath was not an absolute path - // we must ensure that the new path is also explicit relative. + if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { + newPath = "./".concat(newPath); + } - if (isPathLocalRelative(path) && isPathRelative(rootpath) && isPathLocalRelative(newPath) === false) { - newPath = "./".concat(newPath); - } + return newPath; + } + }, { + key: "normalizePath", + value: function normalizePath(path) { + var segments = path.split('/').reverse(); + var segment; + path = []; - return newPath; - }; + while (segments.length !== 0) { + segment = segments.pop(); - contexts.Eval.prototype.normalizePath = function (path) { - var segments = path.split('/').reverse(); - var segment; - path = []; + switch (segment) { + case '.': + break; - while (segments.length !== 0) { - segment = segments.pop(); + case '..': + if (path.length === 0 || path[path.length - 1] === '..') { + path.push(segment); + } else { + path.pop(); + } - switch (segment) { - case '.': - break; + break; - case '..': - if (path.length === 0 || path[path.length - 1] === '..') { - path.push(segment); - } else { - path.pop(); + default: + path.push(segment); + break; } + } - break; - - default: - path.push(segment); - break; + return path.join('/'); } - } - - return path.join('/'); - }; - - function isPathRelative(path) { - return !/^(?:[a-z-]+:|\/|#)/i.test(path); - } + }]); - function isPathLocalRelative(path) { - return path.charAt(0) === '.'; - } // todo - do the same for the toCSS ? + return _class; + }(); function makeRegistry(base) { return { @@ -2476,9 +2539,6 @@ this.value_ = this.error_ = null; } }; - var defaultFunc$1 = { - 'default': defaultFunc.eval.bind(defaultFunc) - }; var Ruleset = /*#__PURE__*/ @@ -2490,6 +2550,7 @@ _classCallCheck(this, Ruleset); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Ruleset).call(this)); _this.selectors = selectors; _this.rules = rules; _this._lookups = {}; @@ -2505,7 +2566,7 @@ _this.setParent(_this.rules, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(Ruleset, [{ @@ -2538,7 +2599,7 @@ if (this.selectors && (selCnt = this.selectors.length)) { selectors = new Array(selCnt); - defaultFunc$1.error({ + defaultFunc.error({ type: 'Syntax', message: 'it is currently only allowed in parametric mixin guards,' }); @@ -2575,7 +2636,7 @@ }); } - defaultFunc$1.reset(); + defaultFunc.reset(); } else { hasOnePassingSelector = true; } @@ -3400,6 +3461,7 @@ _classCallCheck(this, AtRule); + _this = _possibleConstructorReturn(this, _getPrototypeOf(AtRule).call(this)); var i; _this.name = name; _this.value = value instanceof Node ? value : value ? new Anonymous(value) : value; @@ -3427,7 +3489,7 @@ _this.copyVisibilityInfo(visibilityInfo); _this.allowRoot = true; - return _possibleConstructorReturn(_this); + return _this; } _createClass(AtRule, [{ @@ -3586,12 +3648,13 @@ _classCallCheck(this, DetachedRuleset); + _this = _possibleConstructorReturn(this, _getPrototypeOf(DetachedRuleset).call(this)); _this.ruleset = ruleset; _this.frames = frames; _this.setParent(_this.ruleset, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(DetachedRuleset, [{ @@ -3628,6 +3691,7 @@ _classCallCheck(this, Unit); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Unit).call(this)); _this.numerator = numerator ? copyArray(numerator).sort() : []; _this.denominator = denominator ? copyArray(denominator).sort() : []; @@ -3637,7 +3701,7 @@ _this.backupUnit = numerator[0]; } - return _possibleConstructorReturn(_this); + return _this; } _createClass(Unit, [{ @@ -3794,6 +3858,7 @@ _classCallCheck(this, Dimension); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Dimension).call(this)); _this.value = parseFloat(value); if (isNaN(_this.value)) { @@ -3804,7 +3869,7 @@ _this.setParent(_this.unit, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(Dimension, [{ @@ -3875,7 +3940,7 @@ other = other.convertTo(this.unit.usedUnits()); if (context.strictUnits && other.unit.toString() !== unit.toString()) { - throw new Error("Incompatible units. Change the units or use the unit function. Bad units: '".concat(unit.toString(), "' and '").concat(other.unit.toString(), "'.")); + throw new Error("Incompatible units. Change the units or use the unit function. " + "Bad units: '".concat(unit.toString(), "' and '").concat(other.unit.toString(), "'.")); } value = this._operate(context, op, this.value, other.value); @@ -3993,10 +4058,11 @@ _classCallCheck(this, Operation); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Operation).call(this)); _this.op = op.trim(); _this.operands = operands; _this.isSpaced = isSpaced; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Operation, [{ @@ -4074,6 +4140,7 @@ _classCallCheck(this, Expression); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Expression).call(this)); _this.value = value; _this.noSpacing = noSpacing; @@ -4081,7 +4148,7 @@ throw new Error('Expression requires an array parameter'); } - return _possibleConstructorReturn(_this); + return _this; } _createClass(Expression, [{ @@ -4225,12 +4292,13 @@ _classCallCheck(this, Call); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Call).call(this)); _this.name = name; _this.args = args; _this.calc = name === 'calc'; _this._index = index; _this._fileInfo = currentFileInfo; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Call, [{ @@ -4341,10 +4409,11 @@ _classCallCheck(this, Variable); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Variable).call(this)); _this.name = name; _this._index = index; _this._fileInfo = currentFileInfo; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Variable, [{ @@ -4427,10 +4496,11 @@ _classCallCheck(this, Property); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Property).call(this)); _this.name = name; _this._index = index; _this._fileInfo = currentFileInfo; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Property, [{ @@ -4516,10 +4586,11 @@ _classCallCheck(this, Attribute); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Attribute).call(this)); _this.key = key; _this.op = op; _this.value = value; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Attribute, [{ @@ -4561,6 +4632,7 @@ _classCallCheck(this, Quoted); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Quoted).call(this)); _this.escaped = escaped == null ? true : escaped; _this.value = content || ''; _this.quote = str.charAt(0); @@ -4568,7 +4640,7 @@ _this._fileInfo = currentFileInfo; _this.variableRegex = /@\{([\w-]+)\}/g; _this.propRegex = /\$\{([\w-]+)\}/g; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Quoted, [{ @@ -4647,11 +4719,12 @@ _classCallCheck(this, URL); + _this = _possibleConstructorReturn(this, _getPrototypeOf(URL).call(this)); _this.value = val; _this._index = index; _this._fileInfo = currentFileInfo; _this.isEvald = isEvald; - return _possibleConstructorReturn(_this); + return _this; } _createClass(URL, [{ @@ -4726,6 +4799,7 @@ _classCallCheck(this, Media); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Media).call(this)); _this._index = index; _this._fileInfo = currentFileInfo; var selectors = new Selector([], null, null, _this._index, _this._fileInfo).createEmptySelectors(); @@ -4743,7 +4817,7 @@ _this.setParent(_this.rules, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(Media, [{ @@ -4904,6 +4978,7 @@ _classCallCheck(this, Import); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Import).call(this)); _this.options = options; _this._index = index; _this._fileInfo = currentFileInfo; @@ -4911,7 +4986,9 @@ _this.features = features; _this.allowRoot = true; - if (_this.options.less !== undefined || _this.options.inline) ; else { + if (_this.options.less !== undefined || _this.options.inline) { + _this.css = !_this.options.less || _this.options.inline; + } else { var pathValue = _this.getPath(); if (pathValue && /[#\.\&\?]css([\?;].*)?$/.test(pathValue)) { @@ -4925,7 +5002,7 @@ _this.setParent(_this.path, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(Import, [{ @@ -5086,73 +5163,87 @@ Import.prototype.type = 'Import'; - var JsEvalNode = function JsEvalNode() {}; - - JsEvalNode.prototype = new Node(); + var JsEvalNode = + /*#__PURE__*/ + function (_Node) { + _inherits(JsEvalNode, _Node); - JsEvalNode.prototype.evaluateJavaScript = function (expression, context) { - var result; - var that = this; - var evalContext = {}; + function JsEvalNode() { + _classCallCheck(this, JsEvalNode); - if (!context.javascriptEnabled) { - throw { - message: 'Inline JavaScript is not enabled. Is it set in your options?', - filename: this.fileInfo().filename, - index: this.getIndex() - }; + return _possibleConstructorReturn(this, _getPrototypeOf(JsEvalNode).apply(this, arguments)); } - expression = expression.replace(/@\{([\w-]+)\}/g, function (_, name) { - return that.jsify(new Variable("@".concat(name), that.getIndex(), that.fileInfo()).eval(context)); - }); + _createClass(JsEvalNode, [{ + key: "evaluateJavaScript", + value: function evaluateJavaScript(expression, context) { + var result; + var that = this; + var evalContext = {}; - try { - expression = new Function("return (".concat(expression, ")")); - } catch (e) { - throw { - message: "JavaScript evaluation error: ".concat(e.message, " from `").concat(expression, "`"), - filename: this.fileInfo().filename, - index: this.getIndex() - }; - } + if (!context.javascriptEnabled) { + throw { + message: 'Inline JavaScript is not enabled. Is it set in your options?', + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } - var variables = context.frames[0].variables(); + expression = expression.replace(/@\{([\w-]+)\}/g, function (_, name) { + return that.jsify(new Variable("@".concat(name), that.getIndex(), that.fileInfo()).eval(context)); + }); - for (var k in variables) { - if (variables.hasOwnProperty(k)) { - /* jshint loopfunc:true */ - evalContext[k.slice(1)] = { - value: variables[k].value, - toJS: function toJS() { - return this.value.eval(context).toCSS(); + try { + expression = new Function("return (".concat(expression, ")")); + } catch (e) { + throw { + message: "JavaScript evaluation error: ".concat(e.message, " from `").concat(expression, "`"), + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } + + var variables = context.frames[0].variables(); + + for (var k in variables) { + if (variables.hasOwnProperty(k)) { + /* jshint loopfunc:true */ + evalContext[k.slice(1)] = { + value: variables[k].value, + toJS: function toJS() { + return this.value.eval(context).toCSS(); + } + }; } - }; - } - } + } - try { - result = expression.call(evalContext); - } catch (e) { - throw { - message: "JavaScript evaluation error: '".concat(e.name, ": ").concat(e.message.replace(/["]/g, '\''), "'"), - filename: this.fileInfo().filename, - index: this.getIndex() - }; - } + try { + result = expression.call(evalContext); + } catch (e) { + throw { + message: "JavaScript evaluation error: '".concat(e.name, ": ").concat(e.message.replace(/["]/g, '\''), "'"), + filename: this.fileInfo().filename, + index: this.getIndex() + }; + } - return result; - }; + return result; + } + }, { + key: "jsify", + value: function jsify(obj) { + if (Array.isArray(obj.value) && obj.value.length > 1) { + return "[".concat(obj.value.map(function (v) { + return v.toCSS(); + }).join(', '), "]"); + } else { + return obj.toCSS(); + } + } + }]); - JsEvalNode.prototype.jsify = function (obj) { - if (Array.isArray(obj.value) && obj.value.length > 1) { - return "[".concat(obj.value.map(function (v) { - return v.toCSS(); - }).join(', '), "]"); - } else { - return obj.toCSS(); - } - }; + return JsEvalNode; + }(Node); var JavaScript = /*#__PURE__*/ @@ -5164,11 +5255,12 @@ _classCallCheck(this, JavaScript); + _this = _possibleConstructorReturn(this, _getPrototypeOf(JavaScript).call(this)); _this.escaped = escaped; _this.expression = string; _this._index = index; _this._fileInfo = currentFileInfo; - return _possibleConstructorReturn(_this); + return _this; } _createClass(JavaScript, [{ @@ -5205,9 +5297,10 @@ _classCallCheck(this, Assignment); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Assignment).call(this)); _this.key = key; _this.value = val; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Assignment, [{ @@ -5252,12 +5345,13 @@ _classCallCheck(this, Condition); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Condition).call(this)); _this.op = op.trim(); _this.lvalue = l; _this.rvalue = r; _this._index = i; _this.negate = negate; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Condition, [{ @@ -5314,8 +5408,9 @@ _classCallCheck(this, UnicodeDescriptor); + _this = _possibleConstructorReturn(this, _getPrototypeOf(UnicodeDescriptor).call(this)); _this.value = value; - return _possibleConstructorReturn(_this); + return _this; } return UnicodeDescriptor; @@ -5333,8 +5428,9 @@ _classCallCheck(this, Negative); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Negative).call(this)); _this.value = node; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Negative, [{ @@ -5369,6 +5465,7 @@ _classCallCheck(this, Extend); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Extend).call(this)); _this.selector = selector; _this.option = option; _this.object_id = Extend.next_id++; @@ -5394,7 +5491,7 @@ _this.setParent(_this.selector, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(Extend, [{ @@ -5452,11 +5549,12 @@ _classCallCheck(this, VariableCall); + _this = _possibleConstructorReturn(this, _getPrototypeOf(VariableCall).call(this)); _this.variable = variable; _this._index = index; _this._fileInfo = currentFileInfo; _this.allowRoot = true; - return _possibleConstructorReturn(_this); + return _this; } _createClass(VariableCall, [{ @@ -5505,12 +5603,13 @@ _classCallCheck(this, NamespaceValue); + _this = _possibleConstructorReturn(this, _getPrototypeOf(NamespaceValue).call(this)); _this.value = ruleCall; _this.lookups = lookups; _this.important = important; _this._index = index; _this._fileInfo = fileInfo; - return _possibleConstructorReturn(_this); + return _this; } _createClass(NamespaceValue, [{ @@ -5604,6 +5703,7 @@ _classCallCheck(this, Definition); + _this = _possibleConstructorReturn(this, _getPrototypeOf(Definition).call(this)); _this.name = name || 'anonymous mixin'; _this.selectors = [new Selector([new Element(null, name, false, _this._index, _this._fileInfo)])]; _this.params = params; @@ -5627,7 +5727,7 @@ _this.copyVisibilityInfo(visibilityInfo); _this.allowRoot = true; - return _possibleConstructorReturn(_this); + return _this; } _createClass(Definition, [{ @@ -5862,6 +5962,7 @@ _classCallCheck(this, MixinCall); + _this = _possibleConstructorReturn(this, _getPrototypeOf(MixinCall).call(this)); _this.selector = new Selector(elements); _this.arguments = args || []; _this._index = index; @@ -5871,7 +5972,7 @@ _this.setParent(_this.selector, _assertThisInitialized(_this)); - return _possibleConstructorReturn(_this); + return _this; } _createClass(MixinCall, [{ @@ -5921,7 +6022,7 @@ for (f = 0; f < 2; f++) { conditionResult[f] = true; - defaultFunc$1.value(f); + defaultFunc.value(f); for (p = 0; p < mixinPath.length && conditionResult[f]; p++) { namespace = mixinPath[p]; @@ -6008,7 +6109,7 @@ } } - defaultFunc$1.reset(); + defaultFunc.reset(); count = [0, 0, 0]; for (m = 0; m < candidates.length; m++) { @@ -6264,148 +6365,167 @@ return environment; }(); - var abstractFileManager = function abstractFileManager() {}; - - abstractFileManager.prototype.getPath = function (filename) { - var j = filename.lastIndexOf('?'); - - if (j > 0) { - filename = filename.slice(0, j); + var AbstractFileManager = + /*#__PURE__*/ + function () { + function AbstractFileManager() { + _classCallCheck(this, AbstractFileManager); } - j = filename.lastIndexOf('/'); - - if (j < 0) { - j = filename.lastIndexOf('\\'); - } + _createClass(AbstractFileManager, [{ + key: "getPath", + value: function getPath(filename) { + var j = filename.lastIndexOf('?'); - if (j < 0) { - return ''; - } + if (j > 0) { + filename = filename.slice(0, j); + } - return filename.slice(0, j + 1); - }; + j = filename.lastIndexOf('/'); - abstractFileManager.prototype.tryAppendExtension = function (path, ext) { - return /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; - }; + if (j < 0) { + j = filename.lastIndexOf('\\'); + } - abstractFileManager.prototype.tryAppendLessExtension = function (path) { - return this.tryAppendExtension(path, '.less'); - }; + if (j < 0) { + return ''; + } - abstractFileManager.prototype.supportsSync = function () { - return false; - }; + return filename.slice(0, j + 1); + } + }, { + key: "tryAppendExtension", + value: function tryAppendExtension(path, ext) { + return /(\.[a-z]*$)|([\?;].*)$/.test(path) ? path : path + ext; + } + }, { + key: "tryAppendLessExtension", + value: function tryAppendLessExtension(path) { + return this.tryAppendExtension(path, '.less'); + } + }, { + key: "supportsSync", + value: function supportsSync() { + return false; + } + }, { + key: "alwaysMakePathsAbsolute", + value: function alwaysMakePathsAbsolute() { + return false; + } + }, { + key: "isPathAbsolute", + value: function isPathAbsolute(filename) { + return /^(?:[a-z-]+:|\/|\\|#)/i.test(filename); + } // TODO: pull out / replace? - abstractFileManager.prototype.alwaysMakePathsAbsolute = function () { - return false; - }; + }, { + key: "join", + value: function join(basePath, laterPath) { + if (!basePath) { + return laterPath; + } - abstractFileManager.prototype.isPathAbsolute = function (filename) { - return /^(?:[a-z-]+:|\/|\\|#)/i.test(filename); - }; // TODO: pull out / replace? + return basePath + laterPath; + } + }, { + key: "pathDiff", + value: function pathDiff(url, baseUrl) { + // diff between two paths to create a relative path + var urlParts = this.extractUrlParts(url); + var baseUrlParts = this.extractUrlParts(baseUrl); + var i; + var max; + var urlDirectories; + var baseUrlDirectories; + var diff = ''; + if (urlParts.hostPart !== baseUrlParts.hostPart) { + return ''; + } - abstractFileManager.prototype.join = function (basePath, laterPath) { - if (!basePath) { - return laterPath; - } + max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); - return basePath + laterPath; - }; + for (i = 0; i < max; i++) { + if (baseUrlParts.directories[i] !== urlParts.directories[i]) { + break; + } + } - abstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) { - // diff between two paths to create a relative path - var urlParts = this.extractUrlParts(url); - var baseUrlParts = this.extractUrlParts(baseUrl); - var i; - var max; - var urlDirectories; - var baseUrlDirectories; - var diff = ''; + baseUrlDirectories = baseUrlParts.directories.slice(i); + urlDirectories = urlParts.directories.slice(i); - if (urlParts.hostPart !== baseUrlParts.hostPart) { - return ''; - } + for (i = 0; i < baseUrlDirectories.length - 1; i++) { + diff += '../'; + } - max = Math.max(baseUrlParts.directories.length, urlParts.directories.length); + for (i = 0; i < urlDirectories.length - 1; i++) { + diff += "".concat(urlDirectories[i], "/"); + } - for (i = 0; i < max; i++) { - if (baseUrlParts.directories[i] !== urlParts.directories[i]) { - break; + return diff; } - } - - baseUrlDirectories = baseUrlParts.directories.slice(i); - urlDirectories = urlParts.directories.slice(i); - - for (i = 0; i < baseUrlDirectories.length - 1; i++) { - diff += '../'; - } - - for (i = 0; i < urlDirectories.length - 1; i++) { - diff += "".concat(urlDirectories[i], "/"); - } - - return diff; - }; // helper function, not part of API - - - abstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) { - // urlParts[1] = protocol://hostname/ OR / - // urlParts[2] = / if path relative to host base - // urlParts[3] = directories - // urlParts[4] = filename - // urlParts[5] = parameters - var urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; - var urlParts = url.match(urlPartsRegex); - var returner = {}; - var rawDirectories = []; - var directories = []; - var i; - var baseUrlParts; + }, { + key: "extractUrlParts", + // helper function, not part of API + value: function extractUrlParts(url, baseUrl) { + // urlParts[1] = protocol://hostname/ OR / + // urlParts[2] = / if path relative to host base + // urlParts[3] = directories + // urlParts[4] = filename + // urlParts[5] = parameters + var urlPartsRegex = /^((?:[a-z-]+:)?\/{2}(?:[^\/\?#]*\/)|([\/\\]))?((?:[^\/\\\?#]*[\/\\])*)([^\/\\\?#]*)([#\?].*)?$/i; + var urlParts = url.match(urlPartsRegex); + var returner = {}; + var rawDirectories = []; + var directories = []; + var i; + var baseUrlParts; - if (!urlParts) { - throw new Error("Could not parse sheet href - '".concat(url, "'")); - } // Stylesheets in IE don't always return the full path + if (!urlParts) { + throw new Error("Could not parse sheet href - '".concat(url, "'")); + } // Stylesheets in IE don't always return the full path - if (baseUrl && (!urlParts[1] || urlParts[2])) { - baseUrlParts = baseUrl.match(urlPartsRegex); + if (baseUrl && (!urlParts[1] || urlParts[2])) { + baseUrlParts = baseUrl.match(urlPartsRegex); - if (!baseUrlParts) { - throw new Error("Could not parse page url - '".concat(baseUrl, "'")); - } + if (!baseUrlParts) { + throw new Error("Could not parse page url - '".concat(baseUrl, "'")); + } - urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; + urlParts[1] = urlParts[1] || baseUrlParts[1] || ''; - if (!urlParts[2]) { - urlParts[3] = baseUrlParts[3] + urlParts[3]; - } - } + if (!urlParts[2]) { + urlParts[3] = baseUrlParts[3] + urlParts[3]; + } + } - if (urlParts[3]) { - rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); // collapse '..' and skip '.' + if (urlParts[3]) { + rawDirectories = urlParts[3].replace(/\\/g, '/').split('/'); // collapse '..' and skip '.' - for (i = 0; i < rawDirectories.length; i++) { - if (rawDirectories[i] === '..') { - directories.pop(); - } else if (rawDirectories[i] !== '.') { - directories.push(rawDirectories[i]); + for (i = 0; i < rawDirectories.length; i++) { + if (rawDirectories[i] === '..') { + directories.pop(); + } else if (rawDirectories[i] !== '.') { + directories.push(rawDirectories[i]); + } + } } + + returner.hostPart = urlParts[1]; + returner.directories = directories; + returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); + returner.path = (urlParts[1] || '') + directories.join('/'); + returner.filename = urlParts[4]; + returner.fileUrl = returner.path + (urlParts[4] || ''); + returner.url = returner.fileUrl + (urlParts[5] || ''); + return returner; } - } + }]); - returner.hostPart = urlParts[1]; - returner.directories = directories; - returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/'); - returner.path = (urlParts[1] || '') + directories.join('/'); - returner.filename = urlParts[4]; - returner.fileUrl = returner.path + (urlParts[4] || ''); - returner.url = returner.fileUrl + (urlParts[5] || ''); - return returner; - }; + return AbstractFileManager; + }(); var AbstractPluginLoader = /*#__PURE__*/ @@ -12391,7 +12511,7 @@ }; // register functions functionRegistry.addMultiple(boolean$1); - functionRegistry.addMultiple(defaultFunc$1); + functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc)); functionRegistry.addMultiple(color); functionRegistry.addMultiple(colorBlend); functionRegistry.addMultiple(dataUri(environment)); @@ -12814,7 +12934,7 @@ var compress = Boolean(options.compress); if (compress) { - logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); + logger.warn('The compress option has been deprecated. ' + 'We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.'); } var toCSSOptions = { @@ -13295,13 +13415,13 @@ var pm; - var PluginManagerFactory = function PluginManagerFactory(less, newFactory) { + function PluginManagerFactory(less, newFactory) { if (newFactory || !pm) { pm = new PluginManager(less); } return pm; - }; // + } var Parse = (function (environment, ParseTree, ImportManager) { var parse = function parse(input, options, callback) { @@ -13385,22 +13505,34 @@ }); var lessRoot = (function (environment$1, fileManagers) { + /** + * @todo + * This original code could be improved quite a bit. + * Many classes / modules currently add side-effects / mutations to passed in objects, + * which makes it hard to refactor and reason about. + */ + environment$1 = new environment(environment$1, fileManagers); var SourceMapOutput = sourceMapOutput(environment$1); var SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment$1); var ParseTree = parseTree(SourceMapBuilder); var ImportManager = importManager(environment$1); var render = Render(environment$1, ParseTree); var parse = Parse(environment$1, ParseTree, ImportManager); - var environ = new environment(environment$1, fileManagers); var functions = Functions(environment$1); + /** + * @todo + * This root properties / methods need to be organized. + * It's not clear what should / must be public and why. + */ + var initial = { - version: [3, 9, 0], + version: [3, 10, 0], data: data, tree: tree, Environment: environment, - AbstractFileManager: abstractFileManager, + AbstractFileManager: AbstractFileManager, AbstractPluginLoader: AbstractPluginLoader, - environment: environ, + environment: environment$1, visitors: visitors, Parser: Parser, functions: functions, @@ -13413,21 +13545,18 @@ parse: parse, LessError: LessError, transformTree: transformTree, - utils: utils$1, + utils: utils, PluginManager: PluginManagerFactory, logger: logger }; // Create a public API var ctor = function ctor(t) { return function () { - var obj = Object.create(t.prototype); - for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) { args[_key] = arguments[_key]; } - t.apply(obj, Array.prototype.slice.call(args, 0)); - return obj; + return _construct(t, args); }; }; @@ -13453,126 +13582,147 @@ return api; }); - /* global window, XMLHttpRequest */ - var FM = (function (options, logger) { - var fileCache = {}; // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load + var options; + var logger$1; + var fileCache = {}; // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load - var FileManager = function FileManager() {}; + var FileManager = + /*#__PURE__*/ + function (_AbstractFileManager) { + _inherits(FileManager, _AbstractFileManager); - FileManager.prototype = new abstractFileManager(); + function FileManager() { + _classCallCheck(this, FileManager); - FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() { - return true; - }; + return _possibleConstructorReturn(this, _getPrototypeOf(FileManager).apply(this, arguments)); + } - FileManager.prototype.join = function join(basePath, laterPath) { - if (!basePath) { - return laterPath; + _createClass(FileManager, [{ + key: "alwaysMakePathsAbsolute", + value: function alwaysMakePathsAbsolute() { + return true; } + }, { + key: "join", + value: function join(basePath, laterPath) { + if (!basePath) { + return laterPath; + } - return this.extractUrlParts(laterPath, basePath).path; - }; - - FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) { - var xhr = new XMLHttpRequest(); - var async = options.isFileProtocol ? options.fileAsync : true; - - if (typeof xhr.overrideMimeType === 'function') { - xhr.overrideMimeType('text/css'); + return this.extractUrlParts(laterPath, basePath).path; } + }, { + key: "doXHR", + value: function doXHR(url, type, callback, errback) { + var xhr = new XMLHttpRequest(); + var async = options.isFileProtocol ? options.fileAsync : true; + + if (typeof xhr.overrideMimeType === 'function') { + xhr.overrideMimeType('text/css'); + } - logger.debug("XHR: Getting '".concat(url, "'")); - xhr.open('GET', url, async); - xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5'); - xhr.send(null); + logger$1.debug("XHR: Getting '".concat(url, "'")); + xhr.open('GET', url, async); + xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5'); + xhr.send(null); - function handleResponse(xhr, callback, errback) { - if (xhr.status >= 200 && xhr.status < 300) { - callback(xhr.responseText, xhr.getResponseHeader('Last-Modified')); - } else if (typeof errback === 'function') { - errback(xhr.status, url); + function handleResponse(xhr, callback, errback) { + if (xhr.status >= 200 && xhr.status < 300) { + callback(xhr.responseText, xhr.getResponseHeader('Last-Modified')); + } else if (typeof errback === 'function') { + errback(xhr.status, url); + } } - } - if (options.isFileProtocol && !options.fileAsync) { - if (xhr.status === 0 || xhr.status >= 200 && xhr.status < 300) { - callback(xhr.responseText); + if (options.isFileProtocol && !options.fileAsync) { + if (xhr.status === 0 || xhr.status >= 200 && xhr.status < 300) { + callback(xhr.responseText); + } else { + errback(xhr.status, url); + } + } else if (async) { + xhr.onreadystatechange = function () { + if (xhr.readyState == 4) { + handleResponse(xhr, callback, errback); + } + }; } else { - errback(xhr.status, url); + handleResponse(xhr, callback, errback); } - } else if (async) { - xhr.onreadystatechange = function () { - if (xhr.readyState == 4) { - handleResponse(xhr, callback, errback); - } - }; - } else { - handleResponse(xhr, callback, errback); } - }; - - FileManager.prototype.supports = function (filename, currentDirectory, options, environment) { - return true; - }; + }, { + key: "supports", + value: function supports() { + return true; + } + }, { + key: "clearFileCache", + value: function clearFileCache() { + fileCache = {}; + } + }, { + key: "loadFile", + value: function loadFile(filename, currentDirectory, options, environment) { + // TODO: Add prefix support like less-node? + // What about multiple paths? + if (currentDirectory && !this.isPathAbsolute(filename)) { + filename = currentDirectory + filename; + } - FileManager.prototype.clearFileCache = function () { - fileCache = {}; - }; + filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename; + options = options || {}; // sheet may be set to the stylesheet for the initial load or a collection of properties including + // some context variables for imports - FileManager.prototype.loadFile = function loadFile(filename, currentDirectory, options, environment) { - // TODO: Add prefix support like less-node? - // What about multiple paths? - if (currentDirectory && !this.isPathAbsolute(filename)) { - filename = currentDirectory + filename; - } + var hrefParts = this.extractUrlParts(filename, window.location.href); + var href = hrefParts.url; + var self = this; + return new Promise(function (resolve, reject) { + if (options.useFileCache && fileCache[href]) { + try { + var lessText = fileCache[href]; + return resolve({ + contents: lessText, + filename: href, + webInfo: { + lastModified: new Date() + } + }); + } catch (e) { + return reject({ + filename: href, + message: "Error loading file ".concat(href, " error was ").concat(e.message) + }); + } + } - filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename; - options = options || {}; // sheet may be set to the stylesheet for the initial load or a collection of properties including - // some context variables for imports + self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) { + // per file cache + fileCache[href] = data; // Use remote copy (re-parse) - var hrefParts = this.extractUrlParts(filename, window.location.href); - var href = hrefParts.url; - var self = this; - return new Promise(function (resolve, reject) { - if (options.useFileCache && fileCache[href]) { - try { - var lessText = fileCache[href]; - return resolve({ - contents: lessText, + resolve({ + contents: data, filename: href, webInfo: { - lastModified: new Date() + lastModified: lastModified } }); - } catch (e) { - return reject({ - filename: href, - message: "Error loading file ".concat(href, " error was ").concat(e.message) + }, function doXHRError(status, url) { + reject({ + type: 'File', + message: "'".concat(url, "' wasn't found (").concat(status, ")"), + href: href }); - } - } - - self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) { - // per file cache - fileCache[href] = data; // Use remote copy (re-parse) - - resolve({ - contents: data, - filename: href, - webInfo: { - lastModified: lastModified - } - }); - }, function doXHRError(status, url) { - reject({ - type: 'File', - message: "'".concat(url, "' wasn't found (").concat(status, ")"), - href: href }); }); - }); - }; + } + }]); + + return FileManager; + }(AbstractFileManager); + var FM = (function (opts, log) { + options = opts; + logger$1 = log; return FileManager; }); @@ -13590,9 +13740,10 @@ _classCallCheck(this, PluginLoader); + _this = _possibleConstructorReturn(this, _getPrototypeOf(PluginLoader).call(this)); _this.less = less; // Should we shim this.require for browser? Probably not? - return _possibleConstructorReturn(_this); + return _this; } _createClass(PluginLoader, [{ @@ -13662,7 +13813,7 @@ var filenameNoPath = filename.match(/([^\/]+(\?.*)?)$/)[1]; elem.id = id; elem.className = 'less-error-message'; - content = "

        ".concat(e.type || 'Syntax', "Error: ").concat(e.message || 'There is an error in your .less file', "

        in ").concat(filenameNoPath, " "); + content = "

        ".concat(e.type || 'Syntax', "Error: ").concat(e.message || 'There is an error in your .less file') + "

        in ").concat(filenameNoPath, " "); var errorline = function errorline(e, i, classname) { if (e.extract[i] !== undefined) { @@ -14113,24 +14264,24 @@ * used in the browser distributed version of less * to kick-start less using the browser api */ - var options = defaultOptions(); + var options$1 = defaultOptions(); if (window.less) { for (var key in window.less) { if (window.less.hasOwnProperty(key)) { - options[key] = window.less[key]; + options$1[key] = window.less[key]; } } } - addDefaultOptions(window, options); - options.plugins = options.plugins || []; + addDefaultOptions(window, options$1); + options$1.plugins = options$1.plugins || []; if (window.LESS_PLUGINS) { - options.plugins = options.plugins.concat(window.LESS_PLUGINS); + options$1.plugins = options$1.plugins.concat(window.LESS_PLUGINS); } - var less = root(window, options); + var less = root(window, options$1); window.less = less; var css; var head; @@ -14141,18 +14292,18 @@ console.warn(data); } - if (!options.async) { + if (!options$1.async) { head.removeChild(style); } } - if (options.onReady) { + if (options$1.onReady) { if (/!watch/.test(window.location.hash)) { less.watch(); } // Simulate synchronous stylesheet loading by hiding page rendering - if (!options.async) { + if (!options$1.async) { css = 'body { display: none !important }'; head = document.head || document.getElementsByTagName('head')[0]; style = document.createElement('style'); diff --git a/dist/less.min.js b/dist/less.min.js index d6d2c6dea..00e2dfb20 100644 --- a/dist/less.min.js +++ b/dist/less.min.js @@ -1,2 +1,2 @@ -!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e=e||self).less=t()}(this,function(){"use strict";function e(e){return e.replace(/^[a-z-]+:\/+?[^\/]+/,"").replace(/[\?\&]livereload=\w+/,"").replace(/^\//,"").replace(/\.[a-zA-Z]+$/,"").replace(/[^\.\w-]+/g,"-").replace(/\./g,":")}function t(e,t){for(var n in 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style element is added to the DOM, otherwise IE 7 and 8 may crash.\n // See http://social.msdn.microsoft.com/Forums/en-US/7e081b65-878a-4c22-8e68-c10d39c2ed32/internet-explorer-crashes-appending-style-element-to-head\n if (styleNode.styleSheet) {\n try {\n styleNode.styleSheet.cssText = styles;\n } catch (e) {\n throw new Error('Couldn\\'t reassign styleSheet.cssText.');\n }\n }\n },\n currentScript: function(window) {\n const document = window.document;\n return document.currentScript || (() => {\n const scripts = document.getElementsByTagName('script');\n return scripts[scripts.length - 1];\n })();\n }\n};\n","export default {\n 'aliceblue':'#f0f8ff',\n 'antiquewhite':'#faebd7',\n 'aqua':'#00ffff',\n 'aquamarine':'#7fffd4',\n 'azure':'#f0ffff',\n 'beige':'#f5f5dc',\n 'bisque':'#ffe4c4',\n 'black':'#000000',\n 'blanchedalmond':'#ffebcd',\n 'blue':'#0000ff',\n 'blueviolet':'#8a2be2',\n 'brown':'#a52a2a',\n 'burlywood':'#deb887',\n 'cadetblue':'#5f9ea0',\n 'chartreuse':'#7fff00',\n 'chocolate':'#d2691e',\n 'coral':'#ff7f50',\n 'cornflowerblue':'#6495ed',\n 'cornsilk':'#fff8dc',\n 'crimson':'#dc143c',\n 'cyan':'#00ffff',\n 'darkblue':'#00008b',\n 'darkcyan':'#008b8b',\n 'darkgoldenrod':'#b8860b',\n 'darkgray':'#a9a9a9',\n 'darkgrey':'#a9a9a9',\n 'darkgreen':'#006400',\n 'darkkhaki':'#bdb76b',\n 'darkmagenta':'#8b008b',\n 'darkolivegreen':'#556b2f',\n 'darkorange':'#ff8c00',\n 'darkorchid':'#9932cc',\n 'darkred':'#8b0000',\n 'darksalmon':'#e9967a',\n 'darkseagreen':'#8fbc8f',\n 'darkslateblue':'#483d8b',\n 'darkslategray':'#2f4f4f',\n 'darkslategrey':'#2f4f4f',\n 'darkturquoise':'#00ced1',\n 'darkviolet':'#9400d3',\n 'deeppink':'#ff1493',\n 'deepskyblue':'#00bfff',\n 'dimgray':'#696969',\n 'dimgrey':'#696969',\n 'dodgerblue':'#1e90ff',\n 'firebrick':'#b22222',\n 'floralwhite':'#fffaf0',\n 'forestgreen':'#228b22',\n 'fuchsia':'#ff00ff',\n 'gainsboro':'#dcdcdc',\n 'ghostwhite':'#f8f8ff',\n 'gold':'#ffd700',\n 'goldenrod':'#daa520',\n 'gray':'#808080',\n 'grey':'#808080',\n 'green':'#008000',\n 'greenyellow':'#adff2f',\n 'honeydew':'#f0fff0',\n 'hotpink':'#ff69b4',\n 'indianred':'#cd5c5c',\n 'indigo':'#4b0082',\n 'ivory':'#fffff0',\n 'khaki':'#f0e68c',\n 'lavender':'#e6e6fa',\n 'lavenderblush':'#fff0f5',\n 'lawngreen':'#7cfc00',\n 'lemonchiffon':'#fffacd',\n 'lightblue':'#add8e6',\n 'lightcoral':'#f08080',\n 'lightcyan':'#e0ffff',\n 'lightgoldenrodyellow':'#fafad2',\n 'lightgray':'#d3d3d3',\n 'lightgrey':'#d3d3d3',\n 'lightgreen':'#90ee90',\n 'lightpink':'#ffb6c1',\n 'lightsalmon':'#ffa07a',\n 'lightseagreen':'#20b2aa',\n 'lightskyblue':'#87cefa',\n 'lightslategray':'#778899',\n 'lightslategrey':'#778899',\n 'lightsteelblue':'#b0c4de',\n 'lightyellow':'#ffffe0',\n 'lime':'#00ff00',\n 'limegreen':'#32cd32',\n 'linen':'#faf0e6',\n 'magenta':'#ff00ff',\n 'maroon':'#800000',\n 'mediumaquamarine':'#66cdaa',\n 'mediumblue':'#0000cd',\n 'mediumorchid':'#ba55d3',\n 'mediumpurple':'#9370d8',\n 'mediumseagreen':'#3cb371',\n 'mediumslateblue':'#7b68ee',\n 'mediumspringgreen':'#00fa9a',\n 'mediumturquoise':'#48d1cc',\n 'mediumvioletred':'#c71585',\n 'midnightblue':'#191970',\n 'mintcream':'#f5fffa',\n 'mistyrose':'#ffe4e1',\n 'moccasin':'#ffe4b5',\n 'navajowhite':'#ffdead',\n 'navy':'#000080',\n 'oldlace':'#fdf5e6',\n 'olive':'#808000',\n 'olivedrab':'#6b8e23',\n 'orange':'#ffa500',\n 'orangered':'#ff4500',\n 'orchid':'#da70d6',\n 'palegoldenrod':'#eee8aa',\n 'palegreen':'#98fb98',\n 'paleturquoise':'#afeeee',\n 'palevioletred':'#d87093',\n 'papayawhip':'#ffefd5',\n 'peachpuff':'#ffdab9',\n 'peru':'#cd853f',\n 'pink':'#ffc0cb',\n 'plum':'#dda0dd',\n 'powderblue':'#b0e0e6',\n 'purple':'#800080',\n 'rebeccapurple':'#663399',\n 'red':'#ff0000',\n 'rosybrown':'#bc8f8f',\n 'royalblue':'#4169e1',\n 'saddlebrown':'#8b4513',\n 'salmon':'#fa8072',\n 'sandybrown':'#f4a460',\n 'seagreen':'#2e8b57',\n 'seashell':'#fff5ee',\n 'sienna':'#a0522d',\n 'silver':'#c0c0c0',\n 'skyblue':'#87ceeb',\n 'slateblue':'#6a5acd',\n 'slategray':'#708090',\n 'slategrey':'#708090',\n 'snow':'#fffafa',\n 'springgreen':'#00ff7f',\n 'steelblue':'#4682b4',\n 'tan':'#d2b48c',\n 'teal':'#008080',\n 'thistle':'#d8bfd8',\n 'tomato':'#ff6347',\n 'turquoise':'#40e0d0',\n 'violet':'#ee82ee',\n 'wheat':'#f5deb3',\n 'white':'#ffffff',\n 'whitesmoke':'#f5f5f5',\n 'yellow':'#ffff00',\n 'yellowgreen':'#9acd32'\n};","export default {\n length: {\n 'm': 1,\n 'cm': 0.01,\n 'mm': 0.001,\n 'in': 0.0254,\n 'px': 0.0254 / 96,\n 'pt': 0.0254 / 72,\n 'pc': 0.0254 / 72 * 12\n },\n duration: {\n 's': 1,\n 'ms': 0.001\n },\n angle: {\n 'rad': 1 / (2 * Math.PI),\n 'deg': 1 / 360,\n 'grad': 1 / 400,\n 'turn': 1\n }\n};","import colors from './colors';\nimport unitConversions from './unit-conversions';\n\nexport default { colors, unitConversions };\n","class Node {\n constructor() {\n this.parent = null;\n this.visibilityBlocks = undefined;\n this.nodeVisible = undefined;\n this.rootNode = null;\n this.parsed = null;\n\n const self = this;\n Object.defineProperty(this, 'currentFileInfo', {\n get: function() { return self.fileInfo(); }\n });\n Object.defineProperty(this, 'index', {\n get: function() { return self.getIndex(); }\n });\n\n }\n\n setParent(nodes, parent) {\n function set(node) {\n if (node && node instanceof Node) {\n node.parent = parent;\n }\n }\n if (Array.isArray(nodes)) {\n nodes.forEach(set);\n }\n else {\n set(nodes);\n }\n }\n\n getIndex() {\n return this._index || (this.parent && this.parent.getIndex()) || 0;\n }\n\n fileInfo() {\n return this._fileInfo || (this.parent && this.parent.fileInfo()) || {};\n }\n\n isRulesetLike() {\n return false;\n }\n\n toCSS(context) {\n const strs = [];\n this.genCSS(context, {\n add: function(chunk, fileInfo, index) {\n strs.push(chunk);\n },\n isEmpty: function () {\n return strs.length === 0;\n }\n });\n return strs.join('');\n }\n\n genCSS(context, output) {\n output.add(this.value);\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval() { return this; }\n\n _operate(context, op, a, b) {\n switch (op) {\n case '+': return a + b;\n case '-': return a - b;\n case '*': return a * b;\n case '/': return a / b;\n }\n }\n\n fround(context, value) {\n const precision = context && context.numPrecision;\n // add \"epsilon\" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded:\n return (precision) ? Number((value + 2e-16).toFixed(precision)) : value;\n }\n\n // Returns true if this node represents root of ast imported by reference\n blocksVisibility() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n return this.visibilityBlocks !== 0;\n }\n\n addVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks + 1;\n }\n\n removeVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks - 1;\n }\n\n // Turns on node visibility - if called node will be shown in output regardless\n // of whether it comes from import by reference or not\n ensureVisibility() {\n this.nodeVisible = true;\n }\n\n // Turns off node visibility - if called node will NOT be shown in output regardless\n // of whether it comes from import by reference or not\n ensureInvisibility() {\n this.nodeVisible = false;\n }\n\n // return values:\n // false - the node must not be visible\n // true - the node must be visible\n // undefined or null - the node has the same visibility as its parent\n isVisible() {\n return this.nodeVisible;\n }\n\n visibilityInfo() {\n return {\n visibilityBlocks: this.visibilityBlocks,\n nodeVisible: this.nodeVisible\n };\n }\n\n copyVisibilityInfo(info) {\n if (!info) {\n return;\n }\n this.visibilityBlocks = info.visibilityBlocks;\n this.nodeVisible = info.nodeVisible;\n }\n}\n\nNode.compare = (a, b) => {\n /* returns:\n -1: a < b\n 0: a = b\n 1: a > b\n and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */\n\n if ((a.compare) &&\n // for \"symmetric results\" force toCSS-based comparison\n // of Quoted or Anonymous if either value is one of those\n !(b.type === 'Quoted' || b.type === 'Anonymous')) {\n return a.compare(b);\n } else if (b.compare) {\n return -b.compare(a);\n } else if (a.type !== b.type) {\n return undefined;\n }\n\n a = a.value;\n b = b.value;\n if (!Array.isArray(a)) {\n return a === b ? 0 : undefined;\n }\n if (a.length !== b.length) {\n return undefined;\n }\n for (let i = 0; i < a.length; i++) {\n if (Node.compare(a[i], b[i]) !== 0) {\n return undefined;\n }\n }\n return 0;\n};\n\nNode.numericCompare = (a, b) => a < b ? -1\n : a === b ? 0\n : a > b ? 1 : undefined;\nexport default Node;\n","import Node from './node';\nimport colors from '../data/colors';\n\n//\n// RGB Colors - #ff0014, #eee\n//\nclass Color extends Node {\n constructor(rgb, a, originalForm) {\n const self = this;\n //\n // The end goal here, is to parse the arguments\n // into an integer triplet, such as `128, 255, 0`\n //\n // This facilitates operations and conversions.\n //\n if (Array.isArray(rgb)) {\n this.rgb = rgb;\n } else if (rgb.length >= 6) {\n this.rgb = [];\n rgb.match(/.{2}/g).map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c, 16));\n } else {\n self.alpha = (parseInt(c, 16)) / 255;\n }\n });\n } else {\n this.rgb = [];\n rgb.split('').map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c + c, 16));\n } else {\n self.alpha = (parseInt(c + c, 16)) / 255;\n }\n });\n }\n this.alpha = this.alpha || (typeof a === 'number' ? a : 1);\n if (typeof originalForm !== 'undefined') {\n this.value = originalForm;\n }\n }\n\n luma() {\n let r = this.rgb[0] / 255;\n let g = this.rgb[1] / 255;\n let b = this.rgb[2] / 255;\n\n r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4);\n g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4);\n b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4);\n\n return 0.2126 * r + 0.7152 * g + 0.0722 * b;\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context, doNotCompress) {\n const compress = context && context.compress && !doNotCompress;\n let color;\n let alpha;\n let colorFunction;\n let args = [];\n\n // `value` is set if this color was originally\n // converted from a named color string so we need\n // to respect this and try to output named color too.\n alpha = this.fround(context, this.alpha);\n\n if (this.value) {\n if (this.value.indexOf('rgb') === 0) {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n } else if (this.value.indexOf('hsl') === 0) {\n if (alpha < 1) {\n colorFunction = 'hsla';\n } else {\n colorFunction = 'hsl';\n }\n } else {\n return this.value;\n }\n } else {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n }\n\n switch (colorFunction) {\n case 'rgba':\n args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1));\n break;\n case 'hsla':\n args.push(clamp(alpha, 1));\n case 'hsl':\n color = this.toHSL();\n args = [\n this.fround(context, color.h),\n `${this.fround(context, color.s * 100)}%`,\n `${this.fround(context, color.l * 100)}%`\n ].concat(args);\n }\n\n if (colorFunction) {\n // Values are capped between `0` and `255`, rounded and zero-padded.\n return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`;\n }\n\n color = this.toRGB();\n\n if (compress) {\n const splitcolor = color.split('');\n\n // Convert color to short format\n if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) {\n color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`;\n }\n }\n\n return color;\n }\n\n //\n // Operations have to be done per-channel, if not,\n // channels will spill onto each other. Once we have\n // our result, in the form of an integer triplet,\n // we create a new Color node to hold the result.\n //\n operate(context, op, other) {\n const rgb = new Array(3);\n const alpha = this.alpha * (1 - other.alpha) + other.alpha;\n for (let c = 0; c < 3; c++) {\n rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]);\n }\n return new Color(rgb, alpha);\n }\n\n toRGB() {\n return toHex(this.rgb);\n }\n\n toHSL() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const l = (max + min) / 2;\n const d = max - min;\n\n if (max === min) {\n h = s = 0;\n } else {\n s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, l, a };\n }\n\n // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript\n toHSV() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const v = max;\n\n const d = max - min;\n if (max === 0) {\n s = 0;\n } else {\n s = d / max;\n }\n\n if (max === min) {\n h = 0;\n } else {\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, v, a };\n }\n\n toARGB() {\n return toHex([this.alpha * 255].concat(this.rgb));\n }\n\n compare(x) {\n return (x.rgb &&\n x.rgb[0] === this.rgb[0] &&\n x.rgb[1] === this.rgb[1] &&\n x.rgb[2] === this.rgb[2] &&\n x.alpha === this.alpha) ? 0 : undefined;\n }\n}\n\nColor.prototype.type = 'Color';\n\nfunction clamp(v, max) {\n return Math.min(Math.max(v, 0), max);\n}\n\nfunction toHex(v) {\n return `#${v.map(c => {\n c = clamp(Math.round(c), 255);\n return (c < 16 ? '0' : '') + c.toString(16);\n}).join('')}`;\n}\n\nColor.fromKeyword = keyword => {\n let c;\n const key = keyword.toLowerCase();\n if (colors.hasOwnProperty(key)) {\n c = new Color(colors[key].slice(1));\n }\n else if (key === 'transparent') {\n c = new Color([0, 0, 0], 0);\n }\n\n if (c) {\n c.value = keyword;\n return c;\n }\n};\nexport default Color;\n","import Node from './node';\n\nclass Paren extends Node {\n constructor(node) {\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n return new Paren(this.value.eval(context));\n }\n}\n\nParen.prototype.type = 'Paren';\nexport default Paren;\n","import Node from './node';\n\nclass Combinator extends Node {\n constructor(value) {\n if (value === ' ') {\n this.value = ' ';\n this.emptyOrWhitespace = true;\n } else {\n this.value = value ? value.trim() : '';\n this.emptyOrWhitespace = this.value === '';\n }\n }\n\n genCSS(context, output) {\n const spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' ';\n output.add(spaceOrEmpty + this.value + spaceOrEmpty);\n }\n}\n\nCombinator.prototype.type = 'Combinator';\nconst _noSpaceCombinators = {\n '': true,\n ' ': true,\n '|': true\n};\nexport default Combinator;\n","import Node from './node';\nimport Paren from './paren';\nimport Combinator from './combinator';\n\nclass Element extends Node {\n constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) {\n this.combinator = combinator instanceof Combinator ?\n combinator : new Combinator(combinator);\n\n if (typeof value === 'string') {\n this.value = value.trim();\n } else if (value) {\n this.value = value;\n } else {\n this.value = '';\n }\n this.isVariable = isVariable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.combinator, this);\n }\n\n accept(visitor) {\n const value = this.value;\n this.combinator = visitor.visit(this.combinator);\n if (typeof value === 'object') {\n this.value = visitor.visit(value);\n }\n }\n\n eval(context) {\n return new Element(this.combinator,\n this.value.eval ? this.value.eval(context) : this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n clone() {\n return new Element(this.combinator,\n this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context), this.fileInfo(), this.getIndex());\n }\n\n toCSS(context = {}) {\n let value = this.value;\n const firstSelector = context.firstSelector;\n if (value instanceof Paren) {\n // selector in parens should not be affected by outer selector\n // flags (breaks only interpolated selectors - see #1973)\n context.firstSelector = true;\n }\n value = value.toCSS ? value.toCSS(context) : value;\n context.firstSelector = firstSelector;\n if (value === '' && this.combinator.value.charAt(0) === '&') {\n return '';\n } else {\n return this.combinator.toCSS(context) + value;\n }\n }\n}\n\nElement.prototype.type = 'Element';\nexport default Element;\n","\nexport const Math = {\n ALWAYS: 0,\n PARENS_DIVISION: 1,\n PARENS: 2,\n STRICT_LEGACY: 3\n};\n\nexport const RewriteUrls = {\n OFF: 0,\n LOCAL: 1,\n ALL: 2\n};","var clone = (function() {\n'use strict';\n\nfunction _instanceof(obj, type) {\n return type != null && obj instanceof type;\n}\n\nvar nativeMap;\ntry {\n nativeMap = Map;\n} catch(_) {\n // maybe a reference error because no `Map`. Give it a dummy value that no\n // value will ever be an instanceof.\n nativeMap = function() {};\n}\n\nvar nativeSet;\ntry {\n nativeSet = Set;\n} catch(_) {\n nativeSet = function() {};\n}\n\nvar nativePromise;\ntry {\n nativePromise = Promise;\n} catch(_) {\n nativePromise = function() {};\n}\n\n/**\n * Clones (copies) an Object using deep copying.\n *\n * This function supports circular references by default, but if you are certain\n * there are no circular references in your object, you can save some CPU time\n * by calling clone(obj, false).\n *\n * Caution: if `circular` is false and `parent` contains circular references,\n * your program may enter an infinite loop and crash.\n *\n * @param `parent` - the object to be cloned\n * @param `circular` - set to true if the object to be cloned may contain\n * circular references. (optional - true by default)\n * @param `depth` - set to a number if the object is only to be cloned to\n * a particular depth. (optional - defaults to Infinity)\n * @param `prototype` - sets the prototype to be used when cloning an object.\n * (optional - defaults to parent prototype).\n * @param `includeNonEnumerable` - set to true if the non-enumerable properties\n * should be cloned as well. Non-enumerable properties on the prototype\n * chain will be ignored. (optional - false by default)\n*/\nfunction clone(parent, circular, depth, prototype, includeNonEnumerable) {\n if (typeof circular === 'object') {\n depth = circular.depth;\n prototype = circular.prototype;\n includeNonEnumerable = circular.includeNonEnumerable;\n circular = circular.circular;\n }\n // maintain two arrays for circular references, where corresponding parents\n // and children have the same index\n var allParents = [];\n var allChildren = [];\n\n var useBuffer = typeof Buffer != 'undefined';\n\n if (typeof circular == 'undefined')\n circular = true;\n\n if (typeof depth == 'undefined')\n depth = Infinity;\n\n // recurse this function so we don't reset allParents and allChildren\n function _clone(parent, depth) {\n // cloning null always returns null\n if (parent === null)\n return null;\n\n if (depth === 0)\n return parent;\n\n var child;\n var proto;\n if (typeof parent != 'object') {\n return parent;\n }\n\n if (_instanceof(parent, nativeMap)) {\n child = new nativeMap();\n } else if (_instanceof(parent, nativeSet)) {\n child = new nativeSet();\n } else if (_instanceof(parent, nativePromise)) {\n child = new nativePromise(function (resolve, reject) {\n parent.then(function(value) {\n resolve(_clone(value, depth - 1));\n }, function(err) {\n reject(_clone(err, depth - 1));\n });\n });\n } else if (clone.__isArray(parent)) {\n child = [];\n } else if (clone.__isRegExp(parent)) {\n child = new RegExp(parent.source, __getRegExpFlags(parent));\n if (parent.lastIndex) child.lastIndex = parent.lastIndex;\n } else if (clone.__isDate(parent)) {\n child = new Date(parent.getTime());\n } else if (useBuffer && Buffer.isBuffer(parent)) {\n if (Buffer.allocUnsafe) {\n // Node.js >= 4.5.0\n child = Buffer.allocUnsafe(parent.length);\n } else {\n // Older Node.js versions\n child = new Buffer(parent.length);\n }\n parent.copy(child);\n return child;\n } else if (_instanceof(parent, Error)) {\n child = Object.create(parent);\n } else {\n if (typeof prototype == 'undefined') {\n proto = Object.getPrototypeOf(parent);\n child = Object.create(proto);\n }\n else {\n child = Object.create(prototype);\n proto = prototype;\n }\n }\n\n if (circular) {\n var index = allParents.indexOf(parent);\n\n if (index != -1) {\n return allChildren[index];\n }\n allParents.push(parent);\n allChildren.push(child);\n }\n\n if (_instanceof(parent, nativeMap)) {\n parent.forEach(function(value, key) {\n var keyChild = _clone(key, depth - 1);\n var valueChild = _clone(value, depth - 1);\n child.set(keyChild, valueChild);\n });\n }\n if (_instanceof(parent, nativeSet)) {\n parent.forEach(function(value) {\n var entryChild = _clone(value, depth - 1);\n child.add(entryChild);\n });\n }\n\n for (var i in parent) {\n var attrs;\n if (proto) {\n attrs = Object.getOwnPropertyDescriptor(proto, i);\n }\n\n if (attrs && attrs.set == null) {\n continue;\n }\n child[i] = _clone(parent[i], depth - 1);\n }\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(parent);\n for (var i = 0; i < symbols.length; i++) {\n // Don't need to worry about cloning a symbol because it is a primitive,\n // like a number or string.\n var symbol = symbols[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, symbol);\n if (descriptor && !descriptor.enumerable && !includeNonEnumerable) {\n continue;\n }\n child[symbol] = _clone(parent[symbol], depth - 1);\n if (!descriptor.enumerable) {\n Object.defineProperty(child, symbol, {\n enumerable: false\n });\n }\n }\n }\n\n if (includeNonEnumerable) {\n var allPropertyNames = Object.getOwnPropertyNames(parent);\n for (var i = 0; i < allPropertyNames.length; i++) {\n var propertyName = allPropertyNames[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, propertyName);\n if (descriptor && descriptor.enumerable) {\n continue;\n }\n child[propertyName] = _clone(parent[propertyName], depth - 1);\n Object.defineProperty(child, propertyName, {\n enumerable: false\n });\n }\n }\n\n return child;\n }\n\n return _clone(parent, depth);\n}\n\n/**\n * Simple flat clone using prototype, accepts only objects, usefull for property\n * override on FLAT configuration object (no nested props).\n *\n * USE WITH CAUTION! This may not behave as you wish if you do not know how this\n * works.\n */\nclone.clonePrototype = function clonePrototype(parent) {\n if (parent === null)\n return null;\n\n var c = function () {};\n c.prototype = parent;\n return new c();\n};\n\n// private utility functions\n\nfunction __objToStr(o) {\n return Object.prototype.toString.call(o);\n}\nclone.__objToStr = __objToStr;\n\nfunction __isDate(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Date]';\n}\nclone.__isDate = __isDate;\n\nfunction __isArray(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Array]';\n}\nclone.__isArray = __isArray;\n\nfunction __isRegExp(o) {\n return typeof o === 'object' && __objToStr(o) === '[object RegExp]';\n}\nclone.__isRegExp = __isRegExp;\n\nfunction __getRegExpFlags(re) {\n var flags = '';\n if (re.global) flags += 'g';\n if (re.ignoreCase) flags += 'i';\n if (re.multiline) flags += 'm';\n return flags;\n}\nclone.__getRegExpFlags = __getRegExpFlags;\n\nreturn clone;\n})();\n\nif (typeof module === 'object' && module.exports) {\n module.exports = clone;\n}\n","/* jshint proto: true */\nimport * as Constants from './constants';\nimport CloneHelper from 'clone';\n\nexport function getLocation(index, inputStream) {\n let n = index + 1;\n let line = null;\n let column = -1;\n\n while (--n >= 0 && inputStream.charAt(n) !== '\\n') {\n column++;\n }\n\n if (typeof index === 'number') {\n line = (inputStream.slice(0, index).match(/\\n/g) || '').length;\n }\n\n return {\n line,\n column\n };\n}\nexport function copyArray(arr) {\n let i;\n const length = arr.length;\n const copy = new Array(length);\n\n for (i = 0; i < length; i++) {\n copy[i] = arr[i];\n }\n return copy;\n}\nexport function clone(obj) {\n const cloned = {};\n for (const prop in obj) {\n if (obj.hasOwnProperty(prop)) {\n cloned[prop] = obj[prop];\n }\n }\n return cloned;\n}\nexport function copyOptions(obj1, obj2) {\n if (obj2 && obj2._defaults) {\n return obj2;\n }\n const opts = utils.defaults(obj1, obj2);\n if (opts.strictMath) {\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n // Back compat with changed relativeUrls option\n if (opts.relativeUrls) {\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n }\n if (typeof opts.math === 'string') {\n switch (opts.math.toLowerCase()) {\n case 'always':\n opts.math = Constants.Math.ALWAYS;\n break;\n case 'parens-division':\n opts.math = Constants.Math.PARENS_DIVISION;\n break;\n case 'strict':\n case 'parens':\n opts.math = Constants.Math.PARENS;\n break;\n case 'strict-legacy':\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n }\n if (typeof opts.rewriteUrls === 'string') {\n switch (opts.rewriteUrls.toLowerCase()) {\n case 'off':\n opts.rewriteUrls = Constants.RewriteUrls.OFF;\n break;\n case 'local':\n opts.rewriteUrls = Constants.RewriteUrls.LOCAL;\n break;\n case 'all':\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n break;\n }\n }\n return opts;\n}\nexport function defaults(obj1, obj2) {\n let newObj = obj2 || {};\n if (!obj2._defaults) {\n newObj = {};\n const defaults = CloneHelper(obj1);\n newObj._defaults = defaults;\n const cloned = obj2 ? CloneHelper(obj2) : {};\n Object.assign(newObj, defaults, cloned);\n }\n return newObj;\n}\nexport function merge(obj1, obj2) {\n for (const prop in obj2) {\n if (obj2.hasOwnProperty(prop)) {\n obj1[prop] = obj2[prop];\n }\n }\n return obj1;\n}\nexport function flattenArray(arr, result = []) {\n for (let i = 0, length = arr.length; i < length; i++) {\n const value = arr[i];\n if (Array.isArray(value)) {\n utils.flattenArray(value, result);\n } else {\n if (value !== undefined) {\n result.push(value);\n }\n }\n }\n return result;\n}","import * as utils from './utils';\n/**\n * This is a centralized class of any error that could be thrown internally (mostly by the parser).\n * Besides standard .message it keeps some additional data like a path to the file where the error\n * occurred along with line and column numbers.\n *\n * @class\n * @extends Error\n * @type {module.LessError}\n *\n * @prop {string} type\n * @prop {string} filename\n * @prop {number} index\n * @prop {number} line\n * @prop {number} column\n * @prop {number} callLine\n * @prop {number} callExtract\n * @prop {string[]} extract\n *\n * @param {Object} e - An error object to wrap around or just a descriptive object\n * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager?\n * @param {string} [currentFilename]\n */\nconst LessError = function LessError(e, fileContentMap, currentFilename) {\n Error.call(this);\n\n const filename = e.filename || currentFilename;\n\n this.message = e.message;\n this.stack = e.stack;\n\n if (fileContentMap && filename) {\n const input = fileContentMap.contents[filename];\n const loc = utils.getLocation(e.index, input);\n const line = loc.line;\n const col = loc.column;\n const callLine = e.call && utils.getLocation(e.call, input).line;\n const lines = input ? input.split('\\n') : '';\n\n this.type = e.type || 'Syntax';\n this.filename = filename;\n this.index = e.index;\n this.line = typeof line === 'number' ? line + 1 : null;\n this.column = col;\n\n if (!this.line && this.stack) {\n const found = this.stack.match(/(|Function):(\\d+):(\\d+)/);\n\n if (found) {\n if (found[2]) {\n this.line = parseInt(found[2]) - 2;\n }\n if (found[3]) {\n this.column = parseInt(found[3]);\n }\n }\n }\n\n this.callLine = callLine + 1;\n this.callExtract = lines[callLine];\n\n this.extract = [\n lines[this.line - 2],\n lines[this.line - 1],\n lines[this.line]\n ];\n }\n\n};\n\nif (typeof Object.create === 'undefined') {\n const F = () => {};\n F.prototype = Error.prototype;\n LessError.prototype = new F();\n} else {\n LessError.prototype = Object.create(Error.prototype);\n}\n\nLessError.prototype.constructor = LessError;\n\n/**\n * An overridden version of the default Object.prototype.toString\n * which uses additional information to create a helpful message.\n *\n * @param {Object} options\n * @returns {string}\n */\nLessError.prototype.toString = function(options = {}) {\n let message = '';\n const extract = this.extract || [];\n let error = [];\n let stylize = str => str;\n if (options.stylize) {\n const type = typeof options.stylize;\n if (type !== 'function') {\n throw Error(`options.stylize should be a function, got a ${type}!`);\n }\n stylize = options.stylize;\n }\n\n if (this.line !== null) {\n if (typeof extract[0] === 'string') {\n error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey'));\n }\n\n if (typeof extract[1] === 'string') {\n let errorTxt = `${this.line} `;\n if (extract[1]) {\n errorTxt += extract[1].slice(0, this.column) +\n stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') +\n extract[1].slice(this.column + 1), 'red'), 'inverse');\n }\n error.push(errorTxt);\n }\n\n if (typeof extract[2] === 'string') {\n error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey'));\n }\n error = `${error.join('\\n') + stylize('', 'reset')}\\n`;\n }\n\n message += stylize(`${this.type}Error: ${this.message}`, 'red');\n if (this.filename) {\n message += stylize(' in ', 'red') + this.filename;\n }\n if (this.line) {\n message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey');\n }\n\n message += `\\n${error}`;\n\n if (this.callLine) {\n message += `${stylize('from ', 'red') + (this.filename || '')}/n`;\n message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`;\n }\n\n return message;\n};\n\nexport default LessError;","import Node from './node';\nimport Element from './element';\nimport LessError from '../less-error';\n\nclass Selector extends Node {\n constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) {\n this.extendList = extendList;\n this.condition = condition;\n this.evaldCondition = !condition;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.elements = this.getElements(elements);\n this.mixinElements_ = undefined;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.elements, this);\n }\n\n accept(visitor) {\n if (this.elements) {\n this.elements = visitor.visitArray(this.elements);\n }\n if (this.extendList) {\n this.extendList = visitor.visitArray(this.extendList);\n }\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n createDerived(elements, extendList, evaldCondition) {\n elements = this.getElements(elements);\n const newSelector = new Selector(elements, extendList || this.extendList,\n null, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition;\n newSelector.mediaEmpty = this.mediaEmpty;\n return newSelector;\n }\n\n getElements(els) {\n if (!els) {\n return [new Element('', '&', false, this._index, this._fileInfo)];\n }\n if (typeof els === 'string') {\n this.parse.parseNode(\n els, \n ['selector'],\n this._index, \n this._fileInfo, \n function(err, result) {\n if (err) {\n throw new LessError({\n index: err.index,\n message: err.message\n }, this.parse.imports, this._fileInfo.filename);\n }\n els = result[0].elements;\n });\n }\n return els;\n }\n\n createEmptySelectors() {\n const el = new Element('', '&', false, this._index, this._fileInfo);\n const sels = [new Selector([el], null, null, this._index, this._fileInfo)];\n sels[0].mediaEmpty = true;\n return sels;\n }\n\n match(other) {\n const elements = this.elements;\n const len = elements.length;\n let olen;\n let i;\n\n other = other.mixinElements();\n olen = other.length;\n if (olen === 0 || len < olen) {\n return 0;\n } else {\n for (i = 0; i < olen; i++) {\n if (elements[i].value !== other[i]) {\n return 0;\n }\n }\n }\n\n return olen; // return number of matched elements\n }\n\n mixinElements() {\n if (this.mixinElements_) {\n return this.mixinElements_;\n }\n\n let elements = this.elements.map( v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\\*\\.\\w-]([\\w-]|(\\\\.))*/g);\n\n if (elements) {\n if (elements[0] === '&') {\n elements.shift();\n }\n } else {\n elements = [];\n }\n\n return (this.mixinElements_ = elements);\n }\n\n isJustParentSelector() {\n return !this.mediaEmpty &&\n this.elements.length === 1 &&\n this.elements[0].value === '&' &&\n (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === '');\n }\n\n eval(context) {\n const evaldCondition = this.condition && this.condition.eval(context);\n let elements = this.elements;\n let extendList = this.extendList;\n\n elements = elements && elements.map(e => e.eval(context));\n extendList = extendList && extendList.map(extend => extend.eval(context));\n\n return this.createDerived(elements, extendList, evaldCondition);\n }\n\n genCSS(context, output) {\n let i;\n let element;\n if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') {\n output.add(' ', this.fileInfo(), this.getIndex());\n }\n for (i = 0; i < this.elements.length; i++) {\n element = this.elements[i];\n element.genCSS(context, output);\n }\n }\n\n getIsOutput() {\n return this.evaldCondition;\n }\n}\n\nSelector.prototype.type = 'Selector';\nexport default Selector;\n","import Node from './node';\n\nclass Value extends Node {\n constructor(value) {\n if (!value) {\n throw new Error('Value requires an array argument');\n }\n if (!Array.isArray(value)) {\n this.value = [ value ];\n }\n else {\n this.value = value;\n }\n }\n\n accept(visitor) {\n if (this.value) {\n this.value = visitor.visitArray(this.value);\n }\n }\n\n eval(context) {\n if (this.value.length === 1) {\n return this.value[0].eval(context);\n } else {\n return new Value(this.value.map(v => v.eval(context)));\n }\n }\n\n genCSS(context, output) {\n let i;\n for (i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (i + 1 < this.value.length) {\n output.add((context && context.compress) ? ',' : ', ');\n }\n }\n }\n}\n\nValue.prototype.type = 'Value';\nexport default Value;\n","import Node from './node';\n\nclass Keyword extends Node {\n constructor(value) { this.value = value; }\n\n genCSS(context, output) {\n if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; }\n output.add(this.value);\n }\n}\n\nKeyword.prototype.type = 'Keyword';\n\nKeyword.True = new Keyword('true');\nKeyword.False = new Keyword('false');\n\nexport default Keyword;\n","import Node from './node';\n\nclass Anonymous extends Node {\n constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) {\n this.value = value;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.mapLines = mapLines;\n this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike;\n this.allowRoot = true;\n this.copyVisibilityInfo(visibilityInfo);\n }\n\n eval() {\n return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo());\n }\n\n compare(other) {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n\n isRulesetLike() {\n return this.rulesetLike;\n }\n\n genCSS(context, output) {\n this.nodeVisible = Boolean(this.value);\n if (this.nodeVisible) {\n output.add(this.value, this._fileInfo, this._index, this.mapLines);\n }\n }\n}\n\nAnonymous.prototype.type = 'Anonymous';\nexport default Anonymous;\n","import Node from './node';\nimport Value from './value';\nimport Keyword from './keyword';\nimport Anonymous from './anonymous';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Declaration extends Node {\n constructor(name, value, important, merge, index, currentFileInfo, inline, variable) {\n this.name = name;\n this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]);\n this.important = important ? ` ${important.trim()}` : '';\n this.merge = merge;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.inline = inline || false;\n this.variable = (variable !== undefined) ? variable\n : (name.charAt && (name.charAt(0) === '@'));\n this.allowRoot = true;\n this.setParent(this.value, this);\n }\n\n genCSS(context, output) {\n output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex());\n try {\n this.value.genCSS(context, output);\n }\n catch (e) {\n e.index = this._index;\n e.filename = this._fileInfo.filename;\n throw e;\n }\n output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index);\n }\n\n eval(context) {\n let mathBypass = false;\n let prevMath;\n let name = this.name;\n let evaldValue;\n let variable = this.variable;\n if (typeof name !== 'string') {\n // expand 'primitive' name directly to get\n // things faster (~10% for benchmark.less):\n name = (name.length === 1) && (name[0] instanceof Keyword) ?\n name[0].value : evalName(context, name);\n variable = false; // never treat expanded interpolation as new variable name\n }\n\n // @todo remove when parens-division is default\n if (name === 'font' && context.math === MATH.ALWAYS) {\n mathBypass = true;\n prevMath = context.math;\n context.math = MATH.PARENS_DIVISION;\n }\n try {\n context.importantScope.push({});\n evaldValue = this.value.eval(context);\n\n if (!this.variable && evaldValue.type === 'DetachedRuleset') {\n throw { message: 'Rulesets cannot be evaluated on a property.',\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n let important = this.important;\n const importantResult = context.importantScope.pop();\n if (!important && importantResult.important) {\n important = importantResult.important;\n }\n\n return new Declaration(name,\n evaldValue,\n important,\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline,\n variable);\n }\n catch (e) {\n if (typeof e.index !== 'number') {\n e.index = this.getIndex();\n e.filename = this.fileInfo().filename;\n }\n throw e;\n }\n finally {\n if (mathBypass) {\n context.math = prevMath;\n }\n }\n }\n\n makeImportant() {\n return new Declaration(this.name,\n this.value,\n '!important',\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline);\n }\n}\n\nfunction evalName(context, name) {\n let value = '';\n let i;\n const n = name.length;\n const output = {add: function (s) {value += s;}};\n for (i = 0; i < n; i++) {\n name[i].eval(context).genCSS(context, output);\n }\n return value;\n}\n\nDeclaration.prototype.type = 'Declaration';\nexport default Declaration;","const debugInfo = (context, ctx, lineSeparator) => {\n let result = '';\n if (context.dumpLineNumbers && !context.compress) {\n switch (context.dumpLineNumbers) {\n case 'comments':\n result = debugInfo.asComment(ctx);\n break;\n case 'mediaquery':\n result = debugInfo.asMediaQuery(ctx);\n break;\n case 'all':\n result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx);\n break;\n }\n }\n return result;\n};\n\ndebugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\\n`;\n\ndebugInfo.asMediaQuery = ctx => {\n let filenameWithProtocol = ctx.debugInfo.fileName;\n if (!/^[a-z]+:\\/\\//i.test(filenameWithProtocol)) {\n filenameWithProtocol = `file://${filenameWithProtocol}`;\n }\n return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\\/\\\\])/g, a => {\n if (a == '\\\\') {\n a = '\\/';\n }\n return `\\\\${a}`;\n})}}line{font-family:\\\\00003${ctx.debugInfo.lineNumber}}}\\n`;\n};\n\nexport default debugInfo;\n","import Node from './node';\nimport getDebugInfo from './debug-info';\n\nclass Comment extends Node {\n constructor(value, isLineComment, index, currentFileInfo) {\n this.value = value;\n this.isLineComment = isLineComment;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n genCSS(context, output) {\n if (this.debugInfo) {\n output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n }\n\n isSilent(context) {\n const isCompressed = context.compress && this.value[2] !== '!';\n return this.isLineComment || isCompressed;\n }\n}\n\nComment.prototype.type = 'Comment';\nexport default Comment;\n","const contexts = {};\nexport default contexts;\nimport * as Constants from './constants';\n\nconst copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) {\n if (!original) { return; }\n\n for (let i = 0; i < propertiesToCopy.length; i++) {\n if (original.hasOwnProperty(propertiesToCopy[i])) {\n destination[propertiesToCopy[i]] = original[propertiesToCopy[i]];\n }\n }\n};\n\n/*\n parse is used whilst parsing\n */\nconst parseCopyProperties = [\n // options\n 'paths', // option - unmodified - paths to search for imports on\n 'rewriteUrls', // option - whether to adjust URL's to be relative\n 'rootpath', // option - rootpath to append to URL's\n 'strictImports', // option -\n 'insecure', // option - whether to allow imports from insecure ssl hosts\n 'dumpLineNumbers', // option - whether to dump line numbers\n 'compress', // option - whether to compress\n 'syncImport', // option - whether to import synchronously\n 'chunkInput', // option - whether to chunk input. more performant but causes parse issues.\n 'mime', // browser only - mime type for sheet import\n 'useFileCache', // browser only - whether to use the per file session cache\n // context\n 'processImports', // option & context - whether to process imports. if false then imports will not be imported.\n // Used by the import manager to stop multiple import visitors being created.\n 'pluginManager' // Used as the plugin manager for the session\n];\n\ncontexts.Parse = function(options) {\n copyFromOriginal(options, this, parseCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n};\n\nconst evalCopyProperties = [\n 'paths', // additional include paths\n 'compress', // whether to compress\n 'ieCompat', // whether to enforce IE compatibility (IE8 data-uri)\n 'math', // whether math has to be within parenthesis\n 'strictUnits', // whether units need to evaluate correctly\n 'sourceMap', // whether to output a source map\n 'importMultiple', // whether we are currently importing multiple copies\n 'urlArgs', // whether to add args into url tokens\n 'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false\n 'pluginManager', // Used as the plugin manager for the session\n 'importantScope', // used to bubble up !important statements\n 'rewriteUrls' // option - whether to adjust URL's to be relative\n];\n\ncontexts.Eval = function(options, frames) {\n copyFromOriginal(options, this, evalCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n\n this.frames = frames || [];\n this.importantScope = this.importantScope || [];\n};\n\ncontexts.Eval.prototype.enterCalc = function () {\n if (!this.calcStack) {\n this.calcStack = [];\n }\n this.calcStack.push(true);\n this.inCalc = true;\n};\n\ncontexts.Eval.prototype.exitCalc = function () {\n this.calcStack.pop();\n if (!this.calcStack) {\n this.inCalc = false;\n }\n};\n\ncontexts.Eval.prototype.inParenthesis = function () {\n if (!this.parensStack) {\n this.parensStack = [];\n }\n this.parensStack.push(true);\n};\n\ncontexts.Eval.prototype.outOfParenthesis = function () {\n this.parensStack.pop();\n};\n\ncontexts.Eval.prototype.inCalc = false;\ncontexts.Eval.prototype.mathOn = true;\ncontexts.Eval.prototype.isMathOn = function (op) {\n if (!this.mathOn) {\n return false;\n }\n if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) {\n return false;\n }\n if (this.math > Constants.Math.PARENS_DIVISION) {\n return this.parensStack && this.parensStack.length;\n }\n return true;\n};\n\ncontexts.Eval.prototype.pathRequiresRewrite = function (path) {\n const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative;\n\n return isRelative(path);\n};\n\ncontexts.Eval.prototype.rewritePath = function (path, rootpath) {\n let newPath;\n\n rootpath = rootpath || '';\n newPath = this.normalizePath(rootpath + path);\n\n // If a path was explicit relative and the rootpath was not an absolute path\n // we must ensure that the new path is also explicit relative.\n if (isPathLocalRelative(path) &&\n isPathRelative(rootpath) &&\n isPathLocalRelative(newPath) === false) {\n newPath = `./${newPath}`;\n }\n\n return newPath;\n};\n\ncontexts.Eval.prototype.normalizePath = path => {\n const segments = path.split('/').reverse();\n let segment;\n\n path = [];\n while (segments.length !== 0) {\n segment = segments.pop();\n switch ( segment ) {\n case '.':\n break;\n case '..':\n if ((path.length === 0) || (path[path.length - 1] === '..')) {\n path.push( segment );\n } else {\n path.pop();\n }\n break;\n default:\n path.push(segment);\n break;\n }\n }\n\n return path.join('/');\n};\n\nfunction isPathRelative(path) {\n return !/^(?:[a-z-]+:|\\/|#)/i.test(path);\n}\n\nfunction isPathLocalRelative(path) {\n return path.charAt(0) === '.';\n}\n\n// todo - do the same for the toCSS ?\n","function makeRegistry( base ) {\n return {\n _data: {},\n add: function(name, func) {\n // precautionary case conversion, as later querying of\n // the registry by function-caller uses lower case as well.\n name = name.toLowerCase();\n\n if (this._data.hasOwnProperty(name)) {\n // TODO warn\n }\n this._data[name] = func;\n },\n addMultiple: function(functions) {\n Object.keys(functions).forEach(\n name => {\n this.add(name, functions[name]);\n });\n },\n get: function(name) {\n return this._data[name] || ( base && base.get( name ));\n },\n getLocalFunctions: function() {\n return this._data;\n },\n inherit: function() {\n return makeRegistry( this );\n },\n create: function(base) {\n return makeRegistry(base);\n }\n };\n}\n\nexport default makeRegistry( null );","import Keyword from '../tree/keyword';\n\nconst defaultFunc = {\n eval: function () {\n const v = this.value_;\n const e = this.error_;\n if (e) {\n throw e;\n }\n if (v != null) {\n return v ? Keyword.True : Keyword.False;\n }\n },\n value: function (v) {\n this.value_ = v;\n },\n error: function (e) {\n this.error_ = e;\n },\n reset: function () {\n this.value_ = this.error_ = null;\n }\n};\n\nexport default { 'default': defaultFunc.eval.bind(defaultFunc) };\n","import Node from './node';\nimport Declaration from './declaration';\nimport Keyword from './keyword';\nimport Comment from './comment';\nimport Paren from './paren';\nimport Selector from './selector';\nimport Element from './element';\nimport Anonymous from './anonymous';\nimport contexts from '../contexts';\nimport globalFunctionRegistry from '../functions/function-registry';\nimport defaultFunc from '../functions/default';\nimport getDebugInfo from './debug-info';\nimport * as utils from '../utils';\n\nclass Ruleset extends Node {\n constructor(selectors, rules, strictImports, visibilityInfo) {\n this.selectors = selectors;\n this.rules = rules;\n this._lookups = {};\n this._variables = null;\n this._properties = null;\n this.strictImports = strictImports;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n this.setParent(this.selectors, this);\n this.setParent(this.rules, this);\n\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.paths) {\n this.paths = visitor.visitArray(this.paths, true);\n } else if (this.selectors) {\n this.selectors = visitor.visitArray(this.selectors);\n }\n if (this.rules && this.rules.length) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n eval(context) {\n const that = this;\n let selectors;\n let selCnt;\n let selector;\n let i;\n let hasVariable;\n let hasOnePassingSelector = false;\n\n if (this.selectors && (selCnt = this.selectors.length)) {\n selectors = new Array(selCnt);\n defaultFunc.error({\n type: 'Syntax',\n message: 'it is currently only allowed in parametric mixin guards,'\n });\n\n for (i = 0; i < selCnt; i++) {\n selector = this.selectors[i].eval(context);\n for (var j = 0; j < selector.elements.length; j++) {\n if (selector.elements[j].isVariable) {\n hasVariable = true;\n break;\n }\n }\n selectors[i] = selector;\n if (selector.evaldCondition) {\n hasOnePassingSelector = true;\n }\n }\n\n if (hasVariable) {\n const toParseSelectors = new Array(selCnt);\n for (i = 0; i < selCnt; i++) {\n selector = selectors[i];\n toParseSelectors[i] = selector.toCSS(context);\n }\n this.parse.parseNode(\n toParseSelectors.join(','),\n [\"selectors\"], \n selectors[0].getIndex(), \n selectors[0].fileInfo(), \n (err, result) => {\n if (result) {\n selectors = utils.flattenArray(result);\n }\n });\n }\n\n defaultFunc.reset();\n } else {\n hasOnePassingSelector = true;\n }\n\n let rules = this.rules ? utils.copyArray(this.rules) : null;\n const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo());\n let rule;\n let subRule;\n\n ruleset.originalRuleset = this;\n ruleset.root = this.root;\n ruleset.firstRoot = this.firstRoot;\n ruleset.allowImports = this.allowImports;\n\n if (this.debugInfo) {\n ruleset.debugInfo = this.debugInfo;\n }\n\n if (!hasOnePassingSelector) {\n rules.length = 0;\n }\n\n // inherit a function registry from the frames stack when possible;\n // otherwise from the global registry\n ruleset.functionRegistry = (frames => {\n let i = 0;\n const n = frames.length;\n let found;\n for ( ; i !== n ; ++i ) {\n found = frames[ i ].functionRegistry;\n if ( found ) { return found; }\n }\n return globalFunctionRegistry;\n })(context.frames).inherit();\n\n // push the current ruleset to the frames stack\n const ctxFrames = context.frames;\n ctxFrames.unshift(ruleset);\n\n // currrent selectors\n let ctxSelectors = context.selectors;\n if (!ctxSelectors) {\n context.selectors = ctxSelectors = [];\n }\n ctxSelectors.unshift(this.selectors);\n\n // Evaluate imports\n if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {\n ruleset.evalImports(context);\n }\n\n // Store the frames around mixin definitions,\n // so they can be evaluated like closures when the time comes.\n const rsRules = ruleset.rules;\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.evalFirst) {\n rsRules[i] = rule.eval(context);\n }\n }\n\n const mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0;\n\n // Evaluate mixin calls.\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.type === 'MixinCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope if the variable is\n // already there. consider returning false here\n // but we need a way to \"return\" variable from mixins\n return !(ruleset.variable(r.name));\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n } else if (rule.type === 'VariableCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).rules.filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope at all\n return false;\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n if (!rule.evalFirst) {\n rsRules[i] = rule = rule.eval ? rule.eval(context) : rule;\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n // for rulesets, check if it is a css guard and can be removed\n if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) {\n // check if it can be folded in (e.g. & where)\n if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) {\n rsRules.splice(i--, 1);\n\n for (var j = 0; (subRule = rule.rules[j]); j++) {\n if (subRule instanceof Node) {\n subRule.copyVisibilityInfo(rule.visibilityInfo());\n if (!(subRule instanceof Declaration) || !subRule.variable) {\n rsRules.splice(++i, 0, subRule);\n }\n }\n }\n }\n }\n }\n\n // Pop the stack\n ctxFrames.shift();\n ctxSelectors.shift();\n\n if (context.mediaBlocks) {\n for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) {\n context.mediaBlocks[i].bubbleSelectors(selectors);\n }\n }\n\n return ruleset;\n }\n\n evalImports(context) {\n const rules = this.rules;\n let i;\n let importRules;\n if (!rules) { return; }\n\n for (i = 0; i < rules.length; i++) {\n if (rules[i].type === 'Import') {\n importRules = rules[i].eval(context);\n if (importRules && (importRules.length || importRules.length === 0)) {\n rules.splice(...[i, 1].concat(importRules));\n i += importRules.length - 1;\n } else {\n rules.splice(i, 1, importRules);\n }\n this.resetCache();\n }\n }\n }\n\n makeImportant() {\n const result = new Ruleset(this.selectors, this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant();\n } else {\n return r;\n }\n }), this.strictImports, this.visibilityInfo());\n\n return result;\n }\n\n matchArgs(args) {\n return !args || args.length === 0;\n }\n\n // lets you call a css selector with a guard\n matchCondition(args, context) {\n const lastSelector = this.selectors[this.selectors.length - 1];\n if (!lastSelector.evaldCondition) {\n return false;\n }\n if (lastSelector.condition &&\n !lastSelector.condition.eval(\n new contexts.Eval(context,\n context.frames))) {\n return false;\n }\n return true;\n }\n\n resetCache() {\n this._rulesets = null;\n this._variables = null;\n this._properties = null;\n this._lookups = {};\n }\n\n variables() {\n if (!this._variables) {\n this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable === true) {\n hash[r.name] = r;\n }\n // when evaluating variables in an import statement, imports have not been eval'd\n // so we need to go inside import statements.\n // guard against root being a string (in the case of inlined less)\n if (r.type === 'Import' && r.root && r.root.variables) {\n const vars = r.root.variables();\n for (const name in vars) {\n if (vars.hasOwnProperty(name)) {\n hash[name] = r.root.variable(name);\n }\n }\n }\n return hash;\n }, {});\n }\n return this._variables;\n }\n\n properties() {\n if (!this._properties) {\n this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable !== true) {\n const name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ?\n r.name[0].value : r.name;\n // Properties don't overwrite as they can merge\n if (!hash[`$${name}`]) {\n hash[`$${name}`] = [ r ];\n }\n else {\n hash[`$${name}`].push(r);\n }\n }\n return hash;\n }, {});\n }\n return this._properties;\n }\n\n variable(name) {\n const decl = this.variables()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n property(name) {\n const decl = this.properties()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n lastDeclaration() {\n for (let i = this.rules.length; i > 0; i--) {\n const decl = this.rules[i - 1];\n if (decl instanceof Declaration) {\n return this.parseValue(decl);\n }\n }\n }\n\n parseValue(toParse) {\n const self = this;\n function transformDeclaration(decl) {\n if (decl.value instanceof Anonymous && !decl.parsed) {\n if (typeof decl.value.value === 'string') {\n this.parse.parseNode(\n decl.value.value,\n ['value', 'important'], \n decl.value.getIndex(), \n decl.fileInfo(), \n (err, result) => {\n if (err) {\n decl.parsed = true;\n }\n if (result) {\n decl.value = result[0];\n decl.important = result[1] || '';\n decl.parsed = true;\n }\n });\n } else {\n decl.parsed = true;\n }\n\n return decl;\n }\n else {\n return decl;\n }\n }\n if (!Array.isArray(toParse)) {\n return transformDeclaration.call(self, toParse);\n }\n else {\n const nodes = [];\n toParse.forEach(n => {\n nodes.push(transformDeclaration.call(self, n));\n });\n return nodes;\n }\n }\n\n rulesets() {\n if (!this.rules) { return []; }\n\n const filtRules = [];\n const rules = this.rules;\n let i;\n let rule;\n\n for (i = 0; (rule = rules[i]); i++) {\n if (rule.isRuleset) {\n filtRules.push(rule);\n }\n }\n\n return filtRules;\n }\n\n prependRule(rule) {\n const rules = this.rules;\n if (rules) {\n rules.unshift(rule);\n } else {\n this.rules = [ rule ];\n }\n this.setParent(rule, this);\n }\n\n find(selector, self = this, filter) {\n const rules = [];\n let match;\n let foundMixins;\n const key = selector.toCSS();\n\n if (key in this._lookups) { return this._lookups[key]; }\n\n this.rulesets().forEach(rule => {\n if (rule !== self) {\n for (let j = 0; j < rule.selectors.length; j++) {\n match = selector.match(rule.selectors[j]);\n if (match) {\n if (selector.elements.length > match) {\n if (!filter || filter(rule)) {\n foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter);\n for (let i = 0; i < foundMixins.length; ++i) {\n foundMixins[i].path.push(rule);\n }\n Array.prototype.push.apply(rules, foundMixins);\n }\n } else {\n rules.push({ rule, path: []});\n }\n break;\n }\n }\n }\n });\n this._lookups[key] = rules;\n return rules;\n }\n\n genCSS(context, output) {\n let i;\n let j;\n const charsetRuleNodes = [];\n let ruleNodes = [];\n\n let // Line number debugging\n debugInfo;\n\n let rule;\n let path;\n\n context.tabLevel = (context.tabLevel || 0);\n\n if (!this.root) {\n context.tabLevel++;\n }\n\n const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' ');\n const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' ');\n let sep;\n\n let charsetNodeIndex = 0;\n let importNodeIndex = 0;\n for (i = 0; (rule = this.rules[i]); i++) {\n if (rule instanceof Comment) {\n if (importNodeIndex === i) {\n importNodeIndex++;\n }\n ruleNodes.push(rule);\n } else if (rule.isCharset && rule.isCharset()) {\n ruleNodes.splice(charsetNodeIndex, 0, rule);\n charsetNodeIndex++;\n importNodeIndex++;\n } else if (rule.type === 'Import') {\n ruleNodes.splice(importNodeIndex, 0, rule);\n importNodeIndex++;\n } else {\n ruleNodes.push(rule);\n }\n }\n ruleNodes = charsetRuleNodes.concat(ruleNodes);\n\n // If this is the root node, we don't render\n // a selector, or {}.\n if (!this.root) {\n debugInfo = getDebugInfo(context, this, tabSetStr);\n\n if (debugInfo) {\n output.add(debugInfo);\n output.add(tabSetStr);\n }\n\n const paths = this.paths;\n const pathCnt = paths.length;\n let pathSubCnt;\n\n sep = context.compress ? ',' : (`,\\n${tabSetStr}`);\n\n for (i = 0; i < pathCnt; i++) {\n path = paths[i];\n if (!(pathSubCnt = path.length)) { continue; }\n if (i > 0) { output.add(sep); }\n\n context.firstSelector = true;\n path[0].genCSS(context, output);\n\n context.firstSelector = false;\n for (j = 1; j < pathSubCnt; j++) {\n path[j].genCSS(context, output);\n }\n }\n\n output.add((context.compress ? '{' : ' {\\n') + tabRuleStr);\n }\n\n // Compile rules and rulesets\n for (i = 0; (rule = ruleNodes[i]); i++) {\n\n if (i + 1 === ruleNodes.length) {\n context.lastRule = true;\n }\n\n const currentLastRule = context.lastRule;\n if (rule.isRulesetLike(rule)) {\n context.lastRule = false;\n }\n\n if (rule.genCSS) {\n rule.genCSS(context, output);\n } else if (rule.value) {\n output.add(rule.value.toString());\n }\n\n context.lastRule = currentLastRule;\n\n if (!context.lastRule && rule.isVisible()) {\n output.add(context.compress ? '' : (`\\n${tabRuleStr}`));\n } else {\n context.lastRule = false;\n }\n }\n\n if (!this.root) {\n output.add((context.compress ? '}' : `\\n${tabSetStr}}`));\n context.tabLevel--;\n }\n\n if (!output.isEmpty() && !context.compress && this.firstRoot) {\n output.add('\\n');\n }\n }\n\n joinSelectors(paths, context, selectors) {\n for (let s = 0; s < selectors.length; s++) {\n this.joinSelector(paths, context, selectors[s]);\n }\n }\n\n joinSelector(paths, context, selector) {\n function createParenthesis(elementsToPak, originalElement) {\n let replacementParen;\n let j;\n if (elementsToPak.length === 0) {\n replacementParen = new Paren(elementsToPak[0]);\n } else {\n const insideParent = new Array(elementsToPak.length);\n for (j = 0; j < elementsToPak.length; j++) {\n insideParent[j] = new Element(\n null,\n elementsToPak[j],\n originalElement.isVariable,\n originalElement._index,\n originalElement._fileInfo\n );\n }\n replacementParen = new Paren(new Selector(insideParent));\n }\n return replacementParen;\n }\n\n function createSelector(containedElement, originalElement) {\n let element;\n let selector;\n element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo);\n selector = new Selector([element]);\n return selector;\n }\n\n // joins selector path from `beginningPath` with selector path in `addPath`\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns concatenated path\n function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) {\n let newSelectorPath;\n let lastSelector;\n let newJoinedSelector;\n // our new selector path\n newSelectorPath = [];\n\n // construct the joined selector - if & is the first thing this will be empty,\n // if not newJoinedSelector will be the last set of elements in the selector\n if (beginningPath.length > 0) {\n newSelectorPath = utils.copyArray(beginningPath);\n lastSelector = newSelectorPath.pop();\n newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements));\n }\n else {\n newJoinedSelector = originalSelector.createDerived([]);\n }\n\n if (addPath.length > 0) {\n // /deep/ is a CSS4 selector - (removed, so should deprecate)\n // that is valid without anything in front of it\n // so if the & does not have a combinator that is \"\" or \" \" then\n // and there is a combinator on the parent, then grab that.\n // this also allows + a { & .b { .a & { ... though not sure why you would want to do that\n let combinator = replacedElement.combinator;\n\n const parentEl = addPath[0].elements[0];\n if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) {\n combinator = parentEl.combinator;\n }\n // join the elements so far with the first part of the parent\n newJoinedSelector.elements.push(new Element(\n combinator,\n parentEl.value,\n replacedElement.isVariable,\n replacedElement._index,\n replacedElement._fileInfo\n ));\n newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1));\n }\n\n // now add the joined selector - but only if it is not empty\n if (newJoinedSelector.elements.length !== 0) {\n newSelectorPath.push(newJoinedSelector);\n }\n\n // put together the parent selectors after the join (e.g. the rest of the parent)\n if (addPath.length > 1) {\n let restOfPath = addPath.slice(1);\n restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, []));\n newSelectorPath = newSelectorPath.concat(restOfPath);\n }\n return newSelectorPath;\n }\n\n // joins selector path from `beginningPath` with every selector path in `addPaths` array\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns array with all concatenated paths\n function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) {\n let j;\n for (j = 0; j < beginningPath.length; j++) {\n const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector);\n result.push(newSelectorPath);\n }\n return result;\n }\n\n function mergeElementsOnToSelectors(elements, selectors) {\n let i;\n let sel;\n\n if (elements.length === 0) {\n return ;\n }\n if (selectors.length === 0) {\n selectors.push([ new Selector(elements) ]);\n return;\n }\n\n for (i = 0; (sel = selectors[i]); i++) {\n // if the previous thing in sel is a parent this needs to join on to it\n if (sel.length > 0) {\n sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements));\n }\n else {\n sel.push(new Selector(elements));\n }\n }\n }\n\n // replace all parent selectors inside `inSelector` by content of `context` array\n // resulting selectors are returned inside `paths` array\n // returns true if `inSelector` contained at least one parent selector\n function replaceParentSelector(paths, context, inSelector) {\n // The paths are [[Selector]]\n // The first list is a list of comma separated selectors\n // The inner list is a list of inheritance separated selectors\n // e.g.\n // .a, .b {\n // .c {\n // }\n // }\n // == [[.a] [.c]] [[.b] [.c]]\n //\n let i;\n\n let j;\n let k;\n let currentElements;\n let newSelectors;\n let selectorsMultiplied;\n let sel;\n let el;\n let hadParentSelector = false;\n let length;\n let lastSelector;\n function findNestedSelector(element) {\n let maybeSelector;\n if (!(element.value instanceof Paren)) {\n return null;\n }\n\n maybeSelector = element.value.value;\n if (!(maybeSelector instanceof Selector)) {\n return null;\n }\n\n return maybeSelector;\n }\n\n // the elements from the current selector so far\n currentElements = [];\n // the current list of new selectors to add to the path.\n // We will build it up. We initiate it with one empty selector as we \"multiply\" the new selectors\n // by the parents\n newSelectors = [\n []\n ];\n\n for (i = 0; (el = inSelector.elements[i]); i++) {\n // non parent reference elements just get added\n if (el.value !== '&') {\n const nestedSelector = findNestedSelector(el);\n if (nestedSelector != null) {\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n const nestedPaths = [];\n let replaced;\n const replacedNewSelectors = [];\n replaced = replaceParentSelector(nestedPaths, context, nestedSelector);\n hadParentSelector = hadParentSelector || replaced;\n // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors\n for (k = 0; k < nestedPaths.length; k++) {\n const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el);\n addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors);\n }\n newSelectors = replacedNewSelectors;\n currentElements = [];\n } else {\n currentElements.push(el);\n }\n\n } else {\n hadParentSelector = true;\n // the new list of selectors to add\n selectorsMultiplied = [];\n\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n // loop through our current selectors\n for (j = 0; j < newSelectors.length; j++) {\n sel = newSelectors[j];\n // if we don't have any parent paths, the & might be in a mixin so that it can be used\n // whether there are parents or not\n if (context.length === 0) {\n // the combinator used on el should now be applied to the next element instead so that\n // it is not lost\n if (sel.length > 0) {\n sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo));\n }\n selectorsMultiplied.push(sel);\n }\n else {\n // and the parent selectors\n for (k = 0; k < context.length; k++) {\n // We need to put the current selectors\n // then join the last selector's elements on to the parents selectors\n const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector);\n // add that to our new set of selectors\n selectorsMultiplied.push(newSelectorPath);\n }\n }\n }\n\n // our new selectors has been multiplied, so reset the state\n newSelectors = selectorsMultiplied;\n currentElements = [];\n }\n }\n\n // if we have any elements left over (e.g. .a& .b == .b)\n // add them on to all the current selectors\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n for (i = 0; i < newSelectors.length; i++) {\n length = newSelectors[i].length;\n if (length > 0) {\n paths.push(newSelectors[i]);\n lastSelector = newSelectors[i][length - 1];\n newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList);\n }\n }\n\n return hadParentSelector;\n }\n\n function deriveSelector(visibilityInfo, deriveFrom) {\n const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition);\n newSelector.copyVisibilityInfo(visibilityInfo);\n return newSelector;\n }\n\n // joinSelector code follows\n let i;\n\n let newPaths;\n let hadParentSelector;\n\n newPaths = [];\n hadParentSelector = replaceParentSelector(newPaths, context, selector);\n\n if (!hadParentSelector) {\n if (context.length > 0) {\n newPaths = [];\n for (i = 0; i < context.length; i++) {\n\n const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo()));\n\n concatenated.push(selector);\n newPaths.push(concatenated);\n }\n }\n else {\n newPaths = [[selector]];\n }\n }\n\n for (i = 0; i < newPaths.length; i++) {\n paths.push(newPaths[i]);\n }\n }\n}\n\nRuleset.prototype.type = 'Ruleset';\nRuleset.prototype.isRuleset = true;\nexport default Ruleset;\n","import Node from './node';\nimport Selector from './selector';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\n\nclass AtRule extends Node {\n constructor(\n name,\n value,\n rules,\n index,\n currentFileInfo,\n debugInfo,\n isRooted,\n visibilityInfo\n ) {\n let i;\n\n this.name = name;\n this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value);\n if (rules) {\n if (Array.isArray(rules)) {\n this.rules = rules;\n } else {\n this.rules = [rules];\n this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors();\n }\n for (i = 0; i < this.rules.length; i++) {\n this.rules[i].allowImports = true;\n }\n this.setParent(this.rules, this);\n }\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.debugInfo = debugInfo;\n this.isRooted = isRooted || false;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n const value = this.value;\n const rules = this.rules;\n if (rules) {\n this.rules = visitor.visitArray(rules);\n }\n if (value) {\n this.value = visitor.visit(value);\n }\n }\n\n isRulesetLike() {\n return this.rules || !this.isCharset();\n }\n\n isCharset() {\n return '@charset' === this.name;\n }\n\n genCSS(context, output) {\n const value = this.value;\n const rules = this.rules;\n output.add(this.name, this.fileInfo(), this.getIndex());\n if (value) {\n output.add(' ');\n value.genCSS(context, output);\n }\n if (rules) {\n this.outputRuleset(context, output, rules);\n } else {\n output.add(';');\n }\n }\n\n eval(context) {\n let mediaPathBackup;\n let mediaBlocksBackup;\n let value = this.value;\n let rules = this.rules;\n\n // media stored inside other atrule should not bubble over it\n // backpup media bubbling information\n mediaPathBackup = context.mediaPath;\n mediaBlocksBackup = context.mediaBlocks;\n // deleted media bubbling information\n context.mediaPath = [];\n context.mediaBlocks = [];\n\n if (value) {\n value = value.eval(context);\n }\n if (rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n rules = [rules[0].eval(context)];\n rules[0].root = true;\n }\n // restore media bubbling information\n context.mediaPath = mediaPathBackup;\n context.mediaBlocks = mediaBlocksBackup;\n\n return new AtRule(this.name, value, rules,\n this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo());\n }\n\n variable(name) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.variable.call(this.rules[0], name);\n }\n }\n\n find(...args) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.find.apply(this.rules[0], args);\n }\n }\n\n rulesets() {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.rulesets.apply(this.rules[0]);\n }\n }\n\n outputRuleset(context, output, rules) {\n const ruleCnt = rules.length;\n let i;\n context.tabLevel = (context.tabLevel | 0) + 1;\n\n // Compressed\n if (context.compress) {\n output.add('{');\n for (i = 0; i < ruleCnt; i++) {\n rules[i].genCSS(context, output);\n }\n output.add('}');\n context.tabLevel--;\n return;\n }\n\n // Non-compressed\n const tabSetStr = `\\n${Array(context.tabLevel).join(' ')}`;\n\n const tabRuleStr = `${tabSetStr} `;\n if (!ruleCnt) {\n output.add(` {${tabSetStr}}`);\n } else {\n output.add(` {${tabRuleStr}`);\n rules[0].genCSS(context, output);\n for (i = 1; i < ruleCnt; i++) {\n output.add(tabRuleStr);\n rules[i].genCSS(context, output);\n }\n output.add(`${tabSetStr}}`);\n }\n\n context.tabLevel--;\n }\n}\n\nAtRule.prototype.type = 'AtRule';\nexport default AtRule;\n","import Node from './node';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass DetachedRuleset extends Node {\n constructor(ruleset, frames) {\n this.ruleset = ruleset;\n this.frames = frames;\n this.setParent(this.ruleset, this);\n }\n\n accept(visitor) {\n this.ruleset = visitor.visit(this.ruleset);\n }\n\n eval(context) {\n const frames = this.frames || utils.copyArray(context.frames);\n return new DetachedRuleset(this.ruleset, frames);\n }\n\n callEval(context) {\n return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context);\n }\n}\n\nDetachedRuleset.prototype.type = 'DetachedRuleset';\nDetachedRuleset.prototype.evalFirst = true;\nexport default DetachedRuleset;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport * as utils from '../utils';\n\nclass Unit extends Node {\n constructor(numerator, denominator, backupUnit) {\n this.numerator = numerator ? utils.copyArray(numerator).sort() : [];\n this.denominator = denominator ? utils.copyArray(denominator).sort() : [];\n if (backupUnit) {\n this.backupUnit = backupUnit;\n } else if (numerator && numerator.length) {\n this.backupUnit = numerator[0];\n }\n }\n\n clone() {\n return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit);\n }\n\n genCSS(context, output) {\n // Dimension checks the unit is singular and throws an error if in strict math mode.\n const strictUnits = context && context.strictUnits;\n if (this.numerator.length === 1) {\n output.add(this.numerator[0]); // the ideal situation\n } else if (!strictUnits && this.backupUnit) {\n output.add(this.backupUnit);\n } else if (!strictUnits && this.denominator.length) {\n output.add(this.denominator[0]);\n }\n }\n\n toString() {\n let i;\n let returnStr = this.numerator.join('*');\n for (i = 0; i < this.denominator.length; i++) {\n returnStr += `/${this.denominator[i]}`;\n }\n return returnStr;\n }\n\n compare(other) {\n return this.is(other.toString()) ? 0 : undefined;\n }\n\n is(unitString) {\n return this.toString().toUpperCase() === unitString.toUpperCase();\n }\n\n isLength() {\n return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS());\n }\n\n isEmpty() {\n return this.numerator.length === 0 && this.denominator.length === 0;\n }\n\n isSingular() {\n return this.numerator.length <= 1 && this.denominator.length === 0;\n }\n\n map(callback) {\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n this.numerator[i] = callback(this.numerator[i], false);\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n this.denominator[i] = callback(this.denominator[i], true);\n }\n }\n\n usedUnits() {\n let group;\n const result = {};\n let mapUnit;\n let groupName;\n\n mapUnit = atomicUnit => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit) && !result[groupName]) {\n result[groupName] = atomicUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in unitConversions) {\n if (unitConversions.hasOwnProperty(groupName)) {\n group = unitConversions[groupName];\n\n this.map(mapUnit);\n }\n }\n\n return result;\n }\n\n cancel() {\n const counter = {};\n let atomicUnit;\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n atomicUnit = this.numerator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) + 1;\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n atomicUnit = this.denominator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) - 1;\n }\n\n this.numerator = [];\n this.denominator = [];\n\n for (atomicUnit in counter) {\n if (counter.hasOwnProperty(atomicUnit)) {\n const count = counter[atomicUnit];\n\n if (count > 0) {\n for (i = 0; i < count; i++) {\n this.numerator.push(atomicUnit);\n }\n } else if (count < 0) {\n for (i = 0; i < -count; i++) {\n this.denominator.push(atomicUnit);\n }\n }\n }\n }\n\n this.numerator.sort();\n this.denominator.sort();\n }\n}\n\nUnit.prototype.type = 'Unit';\nexport default Unit;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport Unit from './unit';\nimport Color from './color';\n\n//\n// A number with a unit\n//\nclass Dimension extends Node {\n constructor(value, unit) {\n this.value = parseFloat(value);\n if (isNaN(this.value)) {\n throw new Error('Dimension is not a number.');\n }\n this.unit = (unit && unit instanceof Unit) ? unit :\n new Unit(unit ? [unit] : undefined);\n this.setParent(this.unit, this);\n }\n\n accept(visitor) {\n this.unit = visitor.visit(this.unit);\n }\n\n eval(context) {\n return this;\n }\n\n toColor() {\n return new Color([this.value, this.value, this.value]);\n }\n\n genCSS(context, output) {\n if ((context && context.strictUnits) && !this.unit.isSingular()) {\n throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`);\n }\n\n const value = this.fround(context, this.value);\n let strValue = String(value);\n\n if (value !== 0 && value < 0.000001 && value > -0.000001) {\n // would be output 1e-6 etc.\n strValue = value.toFixed(20).replace(/0+$/, '');\n }\n\n if (context && context.compress) {\n // Zero values doesn't need a unit\n if (value === 0 && this.unit.isLength()) {\n output.add(strValue);\n return;\n }\n\n // Float values doesn't need a leading zero\n if (value > 0 && value < 1) {\n strValue = (strValue).substr(1);\n }\n }\n\n output.add(strValue);\n this.unit.genCSS(context, output);\n }\n\n // In an operation between two Dimensions,\n // we default to the first Dimension's unit,\n // so `1px + 2` will yield `3px`.\n operate(context, op, other) {\n /* jshint noempty:false */\n let value = this._operate(context, op, this.value, other.value);\n\n let unit = this.unit.clone();\n\n if (op === '+' || op === '-') {\n if (unit.numerator.length === 0 && unit.denominator.length === 0) {\n unit = other.unit.clone();\n if (this.unit.backupUnit) {\n unit.backupUnit = this.unit.backupUnit;\n }\n } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) {\n // do nothing\n } else {\n other = other.convertTo(this.unit.usedUnits());\n\n if (context.strictUnits && other.unit.toString() !== unit.toString()) {\n throw new Error(`Incompatible units. Change the units or use the unit function. Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`);\n }\n\n value = this._operate(context, op, this.value, other.value);\n }\n } else if (op === '*') {\n unit.numerator = unit.numerator.concat(other.unit.numerator).sort();\n unit.denominator = unit.denominator.concat(other.unit.denominator).sort();\n unit.cancel();\n } else if (op === '/') {\n unit.numerator = unit.numerator.concat(other.unit.denominator).sort();\n unit.denominator = unit.denominator.concat(other.unit.numerator).sort();\n unit.cancel();\n }\n return new Dimension(value, unit);\n }\n\n compare(other) {\n let a;\n let b;\n\n if (!(other instanceof Dimension)) {\n return undefined;\n }\n\n if (this.unit.isEmpty() || other.unit.isEmpty()) {\n a = this;\n b = other;\n } else {\n a = this.unify();\n b = other.unify();\n if (a.unit.compare(b.unit) !== 0) {\n return undefined;\n }\n }\n\n return Node.numericCompare(a.value, b.value);\n }\n\n unify() {\n return this.convertTo({ length: 'px', duration: 's', angle: 'rad' });\n }\n\n convertTo(conversions) {\n let value = this.value;\n const unit = this.unit.clone();\n let i;\n let groupName;\n let group;\n let targetUnit;\n let derivedConversions = {};\n let applyUnit;\n\n if (typeof conversions === 'string') {\n for (i in unitConversions) {\n if (unitConversions[i].hasOwnProperty(conversions)) {\n derivedConversions = {};\n derivedConversions[i] = conversions;\n }\n }\n conversions = derivedConversions;\n }\n applyUnit = (atomicUnit, denominator) => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit)) {\n if (denominator) {\n value = value / (group[atomicUnit] / group[targetUnit]);\n } else {\n value = value * (group[atomicUnit] / group[targetUnit]);\n }\n\n return targetUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in conversions) {\n if (conversions.hasOwnProperty(groupName)) {\n targetUnit = conversions[groupName];\n group = unitConversions[groupName];\n\n unit.map(applyUnit);\n }\n }\n\n unit.cancel();\n\n return new Dimension(value, unit);\n }\n}\n\nDimension.prototype.type = 'Dimension';\nexport default Dimension;\n","import Node from './node';\nimport Color from './color';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Operation extends Node {\n constructor(op, operands, isSpaced) {\n this.op = op.trim();\n this.operands = operands;\n this.isSpaced = isSpaced;\n }\n\n accept(visitor) {\n this.operands = visitor.visitArray(this.operands);\n }\n\n eval(context) {\n let a = this.operands[0].eval(context);\n let b = this.operands[1].eval(context);\n let op;\n\n if (context.isMathOn(this.op)) {\n op = this.op === './' ? '/' : this.op;\n if (a instanceof Dimension && b instanceof Color) {\n a = a.toColor();\n }\n if (b instanceof Dimension && a instanceof Color) {\n b = b.toColor();\n }\n if (!a.operate) {\n if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n throw { type: 'Operation',\n message: 'Operation on an invalid type' };\n }\n\n return a.operate(context, op, b);\n } else {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n }\n\n genCSS(context, output) {\n this.operands[0].genCSS(context, output);\n if (this.isSpaced) {\n output.add(' ');\n }\n output.add(this.op);\n if (this.isSpaced) {\n output.add(' ');\n }\n this.operands[1].genCSS(context, output);\n }\n}\n\nOperation.prototype.type = 'Operation';\nexport default Operation;\n","import Node from './node';\nimport Paren from './paren';\nimport Comment from './comment';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\nclass Expression extends Node {\n constructor(value, noSpacing) {\n this.value = value;\n this.noSpacing = noSpacing;\n if (!value) {\n throw new Error('Expression requires an array parameter');\n }\n }\n\n accept(visitor) {\n this.value = visitor.visitArray(this.value);\n }\n\n eval(context) {\n let returnValue;\n const mathOn = context.isMathOn();\n\n const inParenthesis = this.parens && \n (context.math !== MATH.STRICT_LEGACY || !this.parensInOp);\n\n let doubleParen = false;\n if (inParenthesis) {\n context.inParenthesis();\n }\n if (this.value.length > 1) {\n returnValue = new Expression(this.value.map(e => {\n if (!e.eval) {\n return e;\n }\n return e.eval(context);\n }), this.noSpacing);\n } else if (this.value.length === 1) {\n if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) {\n doubleParen = true;\n }\n returnValue = this.value[0].eval(context);\n } else {\n returnValue = this;\n }\n if (inParenthesis) {\n context.outOfParenthesis();\n }\n if (this.parens && this.parensInOp && !mathOn && !doubleParen \n && (!(returnValue instanceof Dimension))) {\n returnValue = new Paren(returnValue);\n }\n return returnValue;\n }\n\n genCSS(context, output) {\n for (let i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (!this.noSpacing && i + 1 < this.value.length) {\n output.add(' ');\n }\n }\n }\n\n throwAwayComments() {\n this.value = this.value.filter(v => !(v instanceof Comment));\n }\n}\n\nExpression.prototype.type = 'Expression';\nexport default Expression;\n","import Expression from '../tree/expression';\n\nclass functionCaller {\n constructor(name, context, index, currentFileInfo) {\n this.name = name.toLowerCase();\n this.index = index;\n this.context = context;\n this.currentFileInfo = currentFileInfo;\n\n this.func = context.frames[0].functionRegistry.get(this.name);\n }\n\n isValid() {\n return Boolean(this.func);\n }\n\n call(args) {\n // This code is terrible and should be replaced as per this issue...\n // https://github.com/less/less.js/issues/2477\n if (Array.isArray(args)) {\n args = args.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n })\n .map(item => {\n if (item.type === 'Expression') {\n const subNodes = item.value.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n });\n if (subNodes.length === 1) {\n return subNodes[0];\n } else {\n return new Expression(subNodes);\n }\n }\n return item;\n });\n }\n\n return this.func(...args);\n }\n}\n\nexport default functionCaller;\n","import Node from './node';\nimport Anonymous from './anonymous';\nimport FunctionCaller from '../functions/function-caller';\n\n//\n// A function call node.\n//\nclass Call extends Node {\n constructor(name, args, index, currentFileInfo) {\n this.name = name;\n this.args = args;\n this.calc = name === 'calc';\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n accept(visitor) {\n if (this.args) {\n this.args = visitor.visitArray(this.args);\n }\n }\n\n //\n // When evaluating a function call,\n // we either find the function in the functionRegistry,\n // in which case we call it, passing the evaluated arguments,\n // if this returns null or we cannot find the function, we\n // simply print it out as it appeared originally [2].\n //\n // The reason why we evaluate the arguments, is in the case where\n // we try to pass a variable to a function, like: `saturate(@color)`.\n // The function should receive the value, not the variable.\n //\n eval(context) {\n /**\n * Turn off math for calc(), and switch back on for evaluating nested functions\n */\n const currentMathContext = context.mathOn;\n context.mathOn = !this.calc;\n if (this.calc || context.inCalc) {\n context.enterCalc();\n }\n const args = this.args.map(a => a.eval(context));\n if (this.calc || context.inCalc) {\n context.exitCalc();\n }\n context.mathOn = currentMathContext;\n\n let result;\n const funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo());\n\n if (funcCaller.isValid()) {\n try {\n result = funcCaller.call(args);\n } catch (e) {\n throw { \n type: e.type || 'Runtime',\n message: `error evaluating function \\`${this.name}\\`${e.message ? `: ${e.message}` : ''}`,\n index: this.getIndex(), \n filename: this.fileInfo().filename,\n line: e.lineNumber,\n column: e.columnNumber\n };\n }\n\n if (result !== null && result !== undefined) {\n // Results that that are not nodes are cast as Anonymous nodes\n // Falsy values or booleans are returned as empty nodes\n if (!(result instanceof Node)) {\n if (!result || result === true) {\n result = new Anonymous(null); \n }\n else {\n result = new Anonymous(result.toString()); \n }\n \n }\n result._index = this._index;\n result._fileInfo = this._fileInfo;\n return result;\n }\n\n }\n\n return new Call(this.name, args, this.getIndex(), this.fileInfo());\n }\n\n genCSS(context, output) {\n output.add(`${this.name}(`, this.fileInfo(), this.getIndex());\n\n for (let i = 0; i < this.args.length; i++) {\n this.args[i].genCSS(context, output);\n if (i + 1 < this.args.length) {\n output.add(', ');\n }\n }\n\n output.add(')');\n }\n}\n\nCall.prototype.type = 'Call';\nexport default Call;\n","import Node from './node';\nimport Call from './call';\n\nclass Variable extends Node {\n constructor(name, index, currentFileInfo) {\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let variable;\n let name = this.name;\n\n if (name.indexOf('@@') === 0) {\n name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`;\n }\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive variable definition for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n variable = this.find(context.frames, frame => {\n const v = frame.variable(name);\n if (v) {\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n // If in calc, wrap vars in a function call to cascade evaluate args first\n if (context.inCalc) {\n return (new Call('_SELF', [v.value])).eval(context);\n }\n else {\n return v.value.eval(context);\n }\n }\n });\n if (variable) {\n this.evaluating = false;\n return variable;\n } else {\n throw { type: 'Name',\n message: `variable ${name} is undefined`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nVariable.prototype.type = 'Variable';\nexport default Variable;\n","import Node from './node';\nimport Declaration from './declaration';\n\nclass Property extends Node {\n constructor(name, index, currentFileInfo) {\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let property;\n const name = this.name;\n // TODO: shorten this reference\n const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules;\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive property reference for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n property = this.find(context.frames, frame => {\n let v;\n const vArr = frame.property(name);\n if (vArr) {\n for (let i = 0; i < vArr.length; i++) {\n v = vArr[i];\n\n vArr[i] = new Declaration(v.name,\n v.value,\n v.important,\n v.merge,\n v.index,\n v.currentFileInfo,\n v.inline,\n v.variable\n );\n }\n mergeRules(vArr);\n\n v = vArr[vArr.length - 1];\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n v = v.value.eval(context);\n return v;\n }\n });\n if (property) {\n this.evaluating = false;\n return property;\n } else {\n throw { type: 'Name',\n message: `Property '${name}' is undefined`,\n filename: this.currentFileInfo.filename,\n index: this.index };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nProperty.prototype.type = 'Property';\nexport default Property;\n","import Node from './node';\n\nclass Attribute extends Node {\n constructor(key, op, value) {\n this.key = key;\n this.op = op;\n this.value = value;\n }\n\n eval(context) {\n return new Attribute(this.key.eval ? this.key.eval(context) : this.key,\n this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value);\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context) {\n let value = this.key.toCSS ? this.key.toCSS(context) : this.key;\n\n if (this.op) {\n value += this.op;\n value += (this.value.toCSS ? this.value.toCSS(context) : this.value);\n }\n\n return `[${value}]`;\n }\n}\n\nAttribute.prototype.type = 'Attribute';\nexport default Attribute;\n","import Node from './node';\nimport Variable from './variable';\nimport Property from './property';\n\nclass Quoted extends Node {\n constructor(str, content, escaped, index, currentFileInfo) {\n this.escaped = (escaped == null) ? true : escaped;\n this.value = content || '';\n this.quote = str.charAt(0);\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.variableRegex = /@\\{([\\w-]+)\\}/g;\n this.propRegex = /\\$\\{([\\w-]+)\\}/g;\n }\n\n genCSS(context, output) {\n if (!this.escaped) {\n output.add(this.quote, this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n if (!this.escaped) {\n output.add(this.quote);\n }\n }\n\n containsVariables() {\n return this.value.match(this.variableRegex);\n }\n\n eval(context) {\n const that = this;\n let value = this.value;\n const variableReplacement = (_, name) => {\n const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n const propertyReplacement = (_, name) => {\n const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n function iterativeReplace(value, regexp, replacementFnc) {\n let evaluatedValue = value;\n do {\n value = evaluatedValue.toString();\n evaluatedValue = value.replace(regexp, replacementFnc);\n } while (value !== evaluatedValue);\n return evaluatedValue;\n }\n value = iterativeReplace(value, this.variableRegex, variableReplacement);\n value = iterativeReplace(value, this.propRegex, propertyReplacement);\n return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo());\n }\n\n compare(other) {\n // when comparing quoted strings allow the quote to differ\n if (other.type === 'Quoted' && !this.escaped && !other.escaped) {\n return Node.numericCompare(this.value, other.value);\n } else {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n }\n}\n\nQuoted.prototype.type = 'Quoted';\nexport default Quoted;\n","import Node from './node';\n\nclass URL extends Node {\n constructor(val, index, currentFileInfo, isEvald) {\n this.value = val;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.isEvald = isEvald;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n genCSS(context, output) {\n output.add('url(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n const val = this.value.eval(context);\n let rootpath;\n\n if (!this.isEvald) {\n // Add the rootpath if the URL requires a rewrite\n rootpath = this.fileInfo() && this.fileInfo().rootpath;\n if (typeof rootpath === 'string' &&\n typeof val.value === 'string' &&\n context.pathRequiresRewrite(val.value)) {\n if (!val.quote) {\n rootpath = escapePath(rootpath);\n }\n val.value = context.rewritePath(val.value, rootpath);\n } else {\n val.value = context.normalizePath(val.value);\n }\n\n // Add url args if enabled\n if (context.urlArgs) {\n if (!val.value.match(/^\\s*data:/)) {\n const delimiter = val.value.indexOf('?') === -1 ? '?' : '&';\n const urlArgs = delimiter + context.urlArgs;\n if (val.value.indexOf('#') !== -1) {\n val.value = val.value.replace('#', `${urlArgs}#`);\n } else {\n val.value += urlArgs;\n }\n }\n }\n }\n\n return new URL(val, this.getIndex(), this.fileInfo(), true);\n }\n}\n\nURL.prototype.type = 'Url';\n\nfunction escapePath(path) {\n return path.replace(/[\\(\\)'\"\\s]/g, match => `\\\\${match}`);\n}\n\nexport default URL;\n","import Ruleset from './ruleset';\nimport Value from './value';\nimport Selector from './selector';\nimport Anonymous from './anonymous';\nimport Expression from './expression';\nimport AtRule from './atrule';\nimport * as utils from '../utils';\n\nclass Media extends AtRule {\n constructor(value, features, index, currentFileInfo, visibilityInfo) {\n this._index = index;\n this._fileInfo = currentFileInfo;\n\n const selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors();\n\n this.features = new Value(features);\n this.rules = [new Ruleset(selectors, value)];\n this.rules[0].allowImports = true;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n this.setParent(selectors, this);\n this.setParent(this.features, this);\n this.setParent(this.rules, this);\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n if (this.rules) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n genCSS(context, output) {\n output.add('@media ', this._fileInfo, this._index);\n this.features.genCSS(context, output);\n this.outputRuleset(context, output, this.rules);\n }\n\n eval(context) {\n if (!context.mediaBlocks) {\n context.mediaBlocks = [];\n context.mediaPath = [];\n }\n\n const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo());\n if (this.debugInfo) {\n this.rules[0].debugInfo = this.debugInfo;\n media.debugInfo = this.debugInfo;\n }\n \n media.features = this.features.eval(context);\n\n context.mediaPath.push(media);\n context.mediaBlocks.push(media);\n\n this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit();\n context.frames.unshift(this.rules[0]);\n media.rules = [this.rules[0].eval(context)];\n context.frames.shift();\n\n context.mediaPath.pop();\n\n return context.mediaPath.length === 0 ? media.evalTop(context) :\n media.evalNested(context);\n }\n\n evalTop(context) {\n let result = this;\n\n // Render all dependent Media blocks.\n if (context.mediaBlocks.length > 1) {\n const selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors();\n result = new Ruleset(selectors, context.mediaBlocks);\n result.multiMedia = true;\n result.copyVisibilityInfo(this.visibilityInfo());\n this.setParent(result, this);\n }\n\n delete context.mediaBlocks;\n delete context.mediaPath;\n\n return result;\n }\n\n evalNested(context) {\n let i;\n let value;\n const path = context.mediaPath.concat([this]);\n\n // Extract the media-query conditions separated with `,` (OR).\n for (i = 0; i < path.length; i++) {\n value = path[i].features instanceof Value ?\n path[i].features.value : path[i].features;\n path[i] = Array.isArray(value) ? value : [value];\n }\n\n // Trace all permutations to generate the resulting media-query.\n //\n // (a, b and c) with nested (d, e) ->\n // a and d\n // a and e\n // b and c and d\n // b and c and e\n this.features = new Value(this.permute(path).map(path => {\n path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment));\n\n for (i = path.length - 1; i > 0; i--) {\n path.splice(i, 0, new Anonymous('and'));\n }\n\n return new Expression(path);\n }));\n this.setParent(this.features, this);\n\n // Fake a tree-node that doesn't output anything.\n return new Ruleset([], []);\n }\n\n permute(arr) {\n if (arr.length === 0) {\n return [];\n } else if (arr.length === 1) {\n return arr[0];\n } else {\n const result = [];\n const rest = this.permute(arr.slice(1));\n for (let i = 0; i < rest.length; i++) {\n for (let j = 0; j < arr[0].length; j++) {\n result.push([arr[0][j]].concat(rest[i]));\n }\n }\n return result;\n }\n }\n\n bubbleSelectors(selectors) {\n if (!selectors) {\n return;\n }\n this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])];\n this.setParent(this.rules, this);\n }\n}\n\nMedia.prototype.type = 'Media';\nexport default Media;\n","import Node from './node';\nimport Media from './media';\nimport URL from './url';\nimport Quoted from './quoted';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\nimport * as utils from '../utils';\nimport LessError from '../less-error';\n\n//\n// CSS @import node\n//\n// The general strategy here is that we don't want to wait\n// for the parsing to be completed, before we start importing\n// the file. That's because in the context of a browser,\n// most of the time will be spent waiting for the server to respond.\n//\n// On creation, we push the import path to our import queue, though\n// `import,push`, we also pass it a callback, which it'll call once\n// the file has been fetched, and parsed.\n//\nclass Import extends Node {\n constructor(path, features, options, index, currentFileInfo, visibilityInfo) {\n this.options = options;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.path = path;\n this.features = features;\n this.allowRoot = true;\n\n if (this.options.less !== undefined || this.options.inline) {\n this.css = !this.options.less || this.options.inline;\n } else {\n const pathValue = this.getPath();\n if (pathValue && /[#\\.\\&\\?]css([\\?;].*)?$/.test(pathValue)) {\n this.css = true;\n }\n }\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.features, this);\n this.setParent(this.path, this);\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n this.path = visitor.visit(this.path);\n if (!this.options.isPlugin && !this.options.inline && this.root) {\n this.root = visitor.visit(this.root);\n }\n }\n\n genCSS(context, output) {\n if (this.css && this.path._fileInfo.reference === undefined) {\n output.add('@import ', this._fileInfo, this._index);\n this.path.genCSS(context, output);\n if (this.features) {\n output.add(' ');\n this.features.genCSS(context, output);\n }\n output.add(';');\n }\n }\n\n getPath() {\n return (this.path instanceof URL) ?\n this.path.value.value : this.path.value;\n }\n\n isVariableImport() {\n let path = this.path;\n if (path instanceof URL) {\n path = path.value;\n }\n if (path instanceof Quoted) {\n return path.containsVariables();\n }\n\n return true;\n }\n\n evalForImport(context) {\n let path = this.path;\n\n if (path instanceof URL) {\n path = path.value;\n }\n\n return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo());\n }\n\n evalPath(context) {\n const path = this.path.eval(context);\n const fileInfo = this._fileInfo;\n\n if (!(path instanceof URL)) {\n // Add the rootpath if the URL requires a rewrite\n const pathValue = path.value;\n if (fileInfo &&\n pathValue &&\n context.pathRequiresRewrite(pathValue)) {\n path.value = context.rewritePath(pathValue, fileInfo.rootpath);\n } else {\n path.value = context.normalizePath(path.value);\n }\n }\n\n return path;\n }\n\n eval(context) {\n const result = this.doEval(context);\n if (this.options.reference || this.blocksVisibility()) {\n if (result.length || result.length === 0) {\n result.forEach(node => {\n node.addVisibilityBlock();\n }\n );\n } else {\n result.addVisibilityBlock();\n }\n }\n return result;\n }\n\n doEval(context) {\n let ruleset;\n let registry;\n const features = this.features && this.features.eval(context);\n\n if (this.options.isPlugin) {\n if (this.root && this.root.eval) {\n try {\n this.root.eval(context);\n }\n catch (e) {\n e.message = 'Plugin error during evaluation';\n throw new LessError(e, this.root.imports, this.root.filename);\n }\n }\n registry = context.frames[0] && context.frames[0].functionRegistry;\n if ( registry && this.root && this.root.functions ) {\n registry.addMultiple( this.root.functions );\n }\n\n return [];\n }\n\n if (this.skip) {\n if (typeof this.skip === 'function') {\n this.skip = this.skip();\n }\n if (this.skip) {\n return [];\n }\n }\n if (this.options.inline) {\n const contents = new Anonymous(this.root, 0,\n {\n filename: this.importedFilename,\n reference: this.path._fileInfo && this.path._fileInfo.reference\n }, true, true);\n\n return this.features ? new Media([contents], this.features.value) : [contents];\n } else if (this.css) {\n const newImport = new Import(this.evalPath(context), features, this.options, this._index);\n if (!newImport.css && this.error) {\n throw this.error;\n }\n return newImport;\n } else {\n ruleset = new Ruleset(null, utils.copyArray(this.root.rules));\n ruleset.evalImports(context);\n\n return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules;\n }\n }\n}\n\nImport.prototype.type = 'Import';\nexport default Import;\n","import Node from './node';\nimport Variable from './variable';\n\nconst JsEvalNode = () => {\n};\nJsEvalNode.prototype = new Node();\n\nJsEvalNode.prototype.evaluateJavaScript = function (expression, context) {\n let result;\n const that = this;\n const evalContext = {};\n\n if (!context.javascriptEnabled) {\n throw { message: 'Inline JavaScript is not enabled. Is it set in your options?',\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n expression = expression.replace(/@\\{([\\w-]+)\\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context)));\n\n try {\n expression = new Function(`return (${expression})`);\n } catch (e) {\n throw { message: `JavaScript evaluation error: ${e.message} from \\`${expression}\\`` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n const variables = context.frames[0].variables();\n for (const k in variables) {\n if (variables.hasOwnProperty(k)) {\n /* jshint loopfunc:true */\n evalContext[k.slice(1)] = {\n value: variables[k].value,\n toJS: function () {\n return this.value.eval(context).toCSS();\n }\n };\n }\n }\n\n try {\n result = expression.call(evalContext);\n } catch (e) {\n throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/[\"]/g, '\\'')}'` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n return result;\n};\nJsEvalNode.prototype.jsify = obj => {\n if (Array.isArray(obj.value) && (obj.value.length > 1)) {\n return `[${obj.value.map(v => v.toCSS()).join(', ')}]`;\n } else {\n return obj.toCSS();\n }\n};\n\nexport default JsEvalNode;\n","import JsEvalNode from './js-eval-node';\nimport Dimension from './dimension';\nimport Quoted from './quoted';\nimport Anonymous from './anonymous';\n\nclass JavaScript extends JsEvalNode {\n constructor(string, escaped, index, currentFileInfo) {\n this.escaped = escaped;\n this.expression = string;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n const result = this.evaluateJavaScript(this.expression, context);\n const type = typeof result;\n\n if (type === 'number' && !isNaN(result)) {\n return new Dimension(result);\n } else if (type === 'string') {\n return new Quoted(`\"${result}\"`, result, this.escaped, this._index);\n } else if (Array.isArray(result)) {\n return new Anonymous(result.join(', '));\n } else {\n return new Anonymous(result);\n }\n }\n}\n\nJavaScript.prototype.type = 'JavaScript';\nexport default JavaScript;\n","import Node from './node';\n\nclass Assignment extends Node {\n constructor(key, val) {\n this.key = key;\n this.value = val;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval(context) {\n if (this.value.eval) {\n return new Assignment(this.key, this.value.eval(context));\n }\n return this;\n }\n\n genCSS(context, output) {\n output.add(`${this.key}=`);\n if (this.value.genCSS) {\n this.value.genCSS(context, output);\n } else {\n output.add(this.value);\n }\n }\n}\n\nAssignment.prototype.type = 'Assignment';\nexport default Assignment;\n","import Node from './node';\n\nclass Condition extends Node {\n constructor(op, l, r, i, negate) {\n this.op = op.trim();\n this.lvalue = l;\n this.rvalue = r;\n this._index = i;\n this.negate = negate;\n }\n\n accept(visitor) {\n this.lvalue = visitor.visit(this.lvalue);\n this.rvalue = visitor.visit(this.rvalue);\n }\n\n eval(context) {\n const result = ((op, a, b) => {\n switch (op) {\n case 'and': return a && b;\n case 'or': return a || b;\n default:\n switch (Node.compare(a, b)) {\n case -1:\n return op === '<' || op === '=<' || op === '<=';\n case 0:\n return op === '=' || op === '>=' || op === '=<' || op === '<=';\n case 1:\n return op === '>' || op === '>=';\n default:\n return false;\n }\n }\n })(this.op, this.lvalue.eval(context), this.rvalue.eval(context));\n\n return this.negate ? !result : result;\n }\n}\n\nCondition.prototype.type = 'Condition';\nexport default Condition;\n","import Node from './node';\n\nclass UnicodeDescriptor extends Node {\n constructor(value) {\n this.value = value;\n }\n}\n\nUnicodeDescriptor.prototype.type = 'UnicodeDescriptor';\n\nexport default UnicodeDescriptor;\n","import Node from './node';\nimport Operation from './operation';\nimport Dimension from './dimension';\n\nclass Negative extends Node {\n constructor(node) {\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('-');\n this.value.genCSS(context, output);\n }\n\n eval(context) {\n if (context.isMathOn()) {\n return (new Operation('*', [new Dimension(-1), this.value])).eval(context);\n }\n return new Negative(this.value.eval(context));\n }\n}\n\nNegative.prototype.type = 'Negative';\nexport default Negative;\n","import Node from './node';\nimport Selector from './selector';\n\nclass Extend extends Node {\n constructor(selector, option, index, currentFileInfo, visibilityInfo) {\n this.selector = selector;\n this.option = option;\n this.object_id = Extend.next_id++;\n this.parent_ids = [this.object_id];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n switch (option) {\n case 'all':\n this.allowBefore = true;\n this.allowAfter = true;\n break;\n default:\n this.allowBefore = false;\n this.allowAfter = false;\n break;\n }\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n this.selector = visitor.visit(this.selector);\n }\n\n eval(context) {\n return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n clone(context) {\n return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n // it concatenates (joins) all selectors in selector array\n findSelfSelectors(selectors) {\n let selfElements = [];\n let i;\n let selectorElements;\n\n for (i = 0; i < selectors.length; i++) {\n selectorElements = selectors[i].elements;\n // duplicate the logic in genCSS function inside the selector node.\n // future TODO - move both logics into the selector joiner visitor\n if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') {\n selectorElements[0].combinator.value = ' ';\n }\n selfElements = selfElements.concat(selectors[i].elements);\n }\n\n this.selfSelectors = [new Selector(selfElements)];\n this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo());\n }\n}\n\nExtend.next_id = 0;\n\nExtend.prototype.type = 'Extend';\nexport default Extend;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport DetachedRuleset from './detached-ruleset';\nimport LessError from '../less-error';\n\nclass VariableCall extends Node {\n constructor(variable, index, currentFileInfo) {\n this.variable = variable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n eval(context) {\n let rules;\n let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context);\n const error = new LessError({message: `Could not evaluate variable call ${this.variable}`});\n\n if (!detachedRuleset.ruleset) {\n if (detachedRuleset.rules) {\n rules = detachedRuleset;\n }\n else if (Array.isArray(detachedRuleset)) {\n rules = new Ruleset('', detachedRuleset);\n }\n else if (Array.isArray(detachedRuleset.value)) {\n rules = new Ruleset('', detachedRuleset.value);\n }\n else {\n throw error;\n }\n detachedRuleset = new DetachedRuleset(rules);\n }\n if (detachedRuleset.ruleset) {\n return detachedRuleset.callEval(context);\n }\n throw error;\n }\n}\n\nVariableCall.prototype.type = 'VariableCall';\nexport default VariableCall;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport Selector from './selector';\n\nclass NamespaceValue extends Node {\n constructor(ruleCall, lookups, important, index, fileInfo) {\n this.value = ruleCall;\n this.lookups = lookups;\n this.important = important;\n this._index = index;\n this._fileInfo = fileInfo;\n }\n\n eval(context) {\n let i;\n let j;\n let name;\n let rules = this.value.eval(context);\n\n for (i = 0; i < this.lookups.length; i++) {\n name = this.lookups[i];\n\n /**\n * Eval'd DRs return rulesets.\n * Eval'd mixins return rules, so let's make a ruleset if we need it.\n * We need to do this because of late parsing of values\n */\n if (Array.isArray(rules)) {\n rules = new Ruleset([new Selector()], rules);\n }\n\n if (name === '') {\n rules = rules.lastDeclaration();\n }\n else if (name.charAt(0) === '@') {\n if (name.charAt(1) === '@') {\n name = `@${new Variable(name.substr(1)).eval(context).value}`;\n }\n if (rules.variables) {\n rules = rules.variable(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `variable ${name} not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n else {\n if (name.substring(0, 2) === '$@') {\n name = `$${new Variable(name.substr(1)).eval(context).value}`;\n }\n else {\n name = name.charAt(0) === '$' ? name : `$${name}`;\n }\n if (rules.properties) {\n rules = rules.property(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `property \"${name.substr(1)}\" not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n // Properties are an array of values, since a ruleset can have multiple props.\n // We pick the last one (the \"cascaded\" value)\n rules = rules[rules.length - 1];\n }\n\n if (rules.value) {\n rules = rules.eval(context).value;\n }\n if (rules.ruleset) {\n rules = rules.ruleset.eval(context);\n }\n }\n return rules;\n }\n}\n\nNamespaceValue.prototype.type = 'NamespaceValue';\nexport default NamespaceValue;\n","import Selector from './selector';\nimport Element from './element';\nimport Ruleset from './ruleset';\nimport Declaration from './declaration';\nimport DetachedRuleset from './detached-ruleset';\nimport Expression from './expression';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass Definition extends Ruleset {\n constructor(name, params, rules, condition, variadic, frames, visibilityInfo) {\n this.name = name || 'anonymous mixin';\n this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])];\n this.params = params;\n this.condition = condition;\n this.variadic = variadic;\n this.arity = params.length;\n this.rules = rules;\n this._lookups = {};\n const optionalParameters = [];\n this.required = params.reduce((count, p) => {\n if (!p.name || (p.name && !p.value)) {\n return count + 1;\n }\n else {\n optionalParameters.push(p.name);\n return count;\n }\n }, 0);\n this.optionalParameters = optionalParameters;\n this.frames = frames;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n if (this.params && this.params.length) {\n this.params = visitor.visitArray(this.params);\n }\n this.rules = visitor.visitArray(this.rules);\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n evalParams(context, mixinEnv, args, evaldArguments) {\n /* jshint boss:true */\n const frame = new Ruleset(null, null);\n\n let varargs;\n let arg;\n const params = utils.copyArray(this.params);\n let i;\n let j;\n let val;\n let name;\n let isNamedFound;\n let argIndex;\n let argsLength = 0;\n\n if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) {\n frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit();\n }\n mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames));\n\n if (args) {\n args = utils.copyArray(args);\n argsLength = args.length;\n\n for (i = 0; i < argsLength; i++) {\n arg = args[i];\n if (name = (arg && arg.name)) {\n isNamedFound = false;\n for (j = 0; j < params.length; j++) {\n if (!evaldArguments[j] && name === params[j].name) {\n evaldArguments[j] = arg.value.eval(context);\n frame.prependRule(new Declaration(name, arg.value.eval(context)));\n isNamedFound = true;\n break;\n }\n }\n if (isNamedFound) {\n args.splice(i, 1);\n i--;\n continue;\n } else {\n throw { type: 'Runtime', message: `Named argument for ${this.name} ${args[i].name} not found` };\n }\n }\n }\n }\n argIndex = 0;\n for (i = 0; i < params.length; i++) {\n if (evaldArguments[i]) { continue; }\n\n arg = args && args[argIndex];\n\n if (name = params[i].name) {\n if (params[i].variadic) {\n varargs = [];\n for (j = argIndex; j < argsLength; j++) {\n varargs.push(args[j].value.eval(context));\n }\n frame.prependRule(new Declaration(name, new Expression(varargs).eval(context)));\n } else {\n val = arg && arg.value;\n if (val) {\n // This was a mixin call, pass in a detached ruleset of it's eval'd rules\n if (Array.isArray(val)) {\n val = new DetachedRuleset(new Ruleset('', val));\n }\n else {\n val = val.eval(context);\n }\n } else if (params[i].value) {\n val = params[i].value.eval(mixinEnv);\n frame.resetCache();\n } else {\n throw { type: 'Runtime', message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` };\n }\n\n frame.prependRule(new Declaration(name, val));\n evaldArguments[i] = val;\n }\n }\n\n if (params[i].variadic && args) {\n for (j = argIndex; j < argsLength; j++) {\n evaldArguments[j] = args[j].value.eval(context);\n }\n }\n argIndex++;\n }\n\n return frame;\n }\n\n makeImportant() {\n const rules = !this.rules ? this.rules : this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant(true);\n } else {\n return r;\n }\n });\n const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames);\n return result;\n }\n\n eval(context) {\n return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames));\n }\n\n evalCall(context, args, important) {\n const _arguments = [];\n const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames;\n const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments);\n let rules;\n let ruleset;\n\n frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context)));\n\n rules = utils.copyArray(this.rules);\n\n ruleset = new Ruleset(null, rules);\n ruleset.originalRuleset = this;\n ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames)));\n if (important) {\n ruleset = ruleset.makeImportant();\n }\n return ruleset;\n }\n\n matchCondition(args, context) {\n if (this.condition && !this.condition.eval(\n new contexts.Eval(context,\n [this.evalParams(context, /* the parameter variables */\n new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])]\n .concat(this.frames || []) // the parent namespace/mixin frames\n .concat(context.frames)))) { // the current environment frames\n return false;\n }\n return true;\n }\n\n matchArgs(args, context) {\n const allArgsCnt = (args && args.length) || 0;\n let len;\n const optionalParameters = this.optionalParameters;\n const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => {\n if (optionalParameters.indexOf(p.name) < 0) {\n return count + 1;\n } else {\n return count;\n }\n }, 0);\n\n if (!this.variadic) {\n if (requiredArgsCnt < this.required) {\n return false;\n }\n if (allArgsCnt > this.params.length) {\n return false;\n }\n } else {\n if (requiredArgsCnt < (this.required - 1)) {\n return false;\n }\n }\n\n // check patterns\n len = Math.min(requiredArgsCnt, this.arity);\n\n for (let i = 0; i < len; i++) {\n if (!this.params[i].name && !this.params[i].variadic) {\n if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) {\n return false;\n }\n }\n }\n return true;\n }\n}\n\nDefinition.prototype.type = 'MixinDefinition';\nDefinition.prototype.evalFirst = true;\nexport default Definition;\n","import Node from './node';\nimport Selector from './selector';\nimport MixinDefinition from './mixin-definition';\nimport defaultFunc from '../functions/default';\n\nclass MixinCall extends Node {\n constructor(elements, args, index, currentFileInfo, important) {\n this.selector = new Selector(elements);\n this.arguments = args || [];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.important = important;\n this.allowRoot = true;\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n if (this.selector) {\n this.selector = visitor.visit(this.selector);\n }\n if (this.arguments.length) {\n this.arguments = visitor.visitArray(this.arguments);\n }\n }\n\n eval(context) {\n let mixins;\n let mixin;\n let mixinPath;\n const args = [];\n let arg;\n let argValue;\n const rules = [];\n let match = false;\n let i;\n let m;\n let f;\n let isRecursive;\n let isOneFound;\n const candidates = [];\n let candidate;\n const conditionResult = [];\n let defaultResult;\n const defFalseEitherCase = -1;\n const defNone = 0;\n const defTrue = 1;\n const defFalse = 2;\n let count;\n let originalRuleset;\n let noArgumentsFilter;\n\n this.selector = this.selector.eval(context);\n\n function calcDefGroup(mixin, mixinPath) {\n let f;\n let p;\n let namespace;\n\n for (f = 0; f < 2; f++) {\n conditionResult[f] = true;\n defaultFunc.value(f);\n for (p = 0; p < mixinPath.length && conditionResult[f]; p++) {\n namespace = mixinPath[p];\n if (namespace.matchCondition) {\n conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context);\n }\n }\n if (mixin.matchCondition) {\n conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context);\n }\n }\n if (conditionResult[0] || conditionResult[1]) {\n if (conditionResult[0] != conditionResult[1]) {\n return conditionResult[1] ?\n defTrue : defFalse;\n }\n\n return defNone;\n }\n return defFalseEitherCase;\n }\n\n for (i = 0; i < this.arguments.length; i++) {\n arg = this.arguments[i];\n argValue = arg.value.eval(context);\n if (arg.expand && Array.isArray(argValue.value)) {\n argValue = argValue.value;\n for (m = 0; m < argValue.length; m++) {\n args.push({value: argValue[m]});\n }\n } else {\n args.push({name: arg.name, value: argValue});\n }\n }\n\n noArgumentsFilter = rule => rule.matchArgs(null, context);\n\n for (i = 0; i < context.frames.length; i++) {\n if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) {\n isOneFound = true;\n\n // To make `default()` function independent of definition order we have two \"subpasses\" here.\n // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`),\n // and build candidate list with corresponding flags. Then, when we know all possible matches,\n // we make a final decision.\n\n for (m = 0; m < mixins.length; m++) {\n mixin = mixins[m].rule;\n mixinPath = mixins[m].path;\n isRecursive = false;\n for (f = 0; f < context.frames.length; f++) {\n if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) {\n isRecursive = true;\n break;\n }\n }\n if (isRecursive) {\n continue;\n }\n\n if (mixin.matchArgs(args, context)) {\n candidate = {mixin, group: calcDefGroup(mixin, mixinPath)};\n\n if (candidate.group !== defFalseEitherCase) {\n candidates.push(candidate);\n }\n\n match = true;\n }\n }\n\n defaultFunc.reset();\n\n count = [0, 0, 0];\n for (m = 0; m < candidates.length; m++) {\n count[candidates[m].group]++;\n }\n\n if (count[defNone] > 0) {\n defaultResult = defFalse;\n } else {\n defaultResult = defTrue;\n if ((count[defTrue] + count[defFalse]) > 1) {\n throw { type: 'Runtime',\n message: `Ambiguous use of \\`default()\\` found when matching for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n for (m = 0; m < candidates.length; m++) {\n candidate = candidates[m].group;\n if ((candidate === defNone) || (candidate === defaultResult)) {\n try {\n mixin = candidates[m].mixin;\n if (!(mixin instanceof MixinDefinition)) {\n originalRuleset = mixin.originalRuleset || mixin;\n mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo());\n mixin.originalRuleset = originalRuleset;\n }\n const newRules = mixin.evalCall(context, args, this.important).rules;\n this._setVisibilityToReplacement(newRules);\n Array.prototype.push.apply(rules, newRules);\n } catch (e) {\n throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack };\n }\n }\n }\n\n if (match) {\n return rules;\n }\n }\n }\n if (isOneFound) {\n throw { type: 'Runtime',\n message: `No matching definition was found for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n } else {\n throw { type: 'Name',\n message: `${this.selector.toCSS().trim()} is undefined`,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n _setVisibilityToReplacement(replacement) {\n let i;\n let rule;\n if (this.blocksVisibility()) {\n for (i = 0; i < replacement.length; i++) {\n rule = replacement[i];\n rule.addVisibilityBlock();\n }\n }\n }\n\n format(args) {\n return `${this.selector.toCSS().trim()}(${args ? args.map(a => {\n let argValue = '';\n if (a.name) {\n argValue += `${a.name}:`;\n }\n if (a.value.toCSS) {\n argValue += a.value.toCSS();\n } else {\n argValue += '???';\n }\n return argValue;\n }).join(', ') : ''})`;\n }\n}\n\nMixinCall.prototype.type = 'MixinCall';\nexport default MixinCall;\n","const tree = Object.create(null);\n\nimport Node from './node';\nimport Color from './color';\nimport AtRule from './atrule';\nimport DetachedRuleset from './detached-ruleset';\nimport Operation from './operation';\nimport Dimension from './dimension';\nimport Unit from './unit';\nimport Keyword from './keyword';\nimport Variable from './variable';\nimport Property from './property';\nimport Ruleset from './ruleset';\nimport Element from './element';\nimport Attribute from './attribute';\nimport Combinator from './combinator';\nimport Selector from './selector';\nimport Quoted from './quoted';\nimport Expression from './expression';\nimport Declaration from './declaration';\nimport Call from './call';\nimport URL from './url';\nimport Import from './import';\nimport Comment from './comment';\nimport Anonymous from './anonymous';\nimport Value from './value';\nimport JavaScript from './javascript';\nimport Assignment from './assignment';\nimport Condition from './condition';\nimport Paren from './paren';\nimport Media from './media';\nimport UnicodeDescriptor from './unicode-descriptor';\nimport Negative from './negative';\nimport Extend from './extend';\nimport VariableCall from './variable-call';\nimport NamespaceValue from './namespace-value';\n\n// mixins\nimport MixinCall from './mixin-call';\nimport MixinDefinition from './mixin-definition';\n\nexport default {\n Node, Color, AtRule, DetachedRuleset, Operation,\n Dimension, Unit, Keyword, Variable, Property,\n Ruleset, Element, Attribute, Combinator, Selector,\n Quoted, Expression, Declaration, Call, URL, Import,\n Comment, Anonymous, Value, JavaScript, Assignment,\n Condition, Paren, Media, UnicodeDescriptor, Negative,\n Extend, VariableCall, NamespaceValue,\n mixin: {\n Call: MixinCall,\n Definition: MixinDefinition\n }\n};","export default {\n error: function(msg) {\n this._fireEvent('error', msg);\n },\n warn: function(msg) {\n this._fireEvent('warn', msg);\n },\n info: function(msg) {\n this._fireEvent('info', msg);\n },\n debug: function(msg) {\n this._fireEvent('debug', msg);\n },\n addListener: function(listener) {\n this._listeners.push(listener);\n },\n removeListener: function(listener) {\n for (let i = 0; i < this._listeners.length; i++) {\n if (this._listeners[i] === listener) {\n this._listeners.splice(i, 1);\n return;\n }\n }\n },\n _fireEvent: function(type, msg) {\n for (let i = 0; i < this._listeners.length; i++) {\n const logFunction = this._listeners[i][type];\n if (logFunction) {\n logFunction(msg);\n }\n }\n },\n _listeners: []\n};\n","/**\n * @todo Document why this abstraction exists, and the relationship between\n * environment, file managers, and plugin manager\n */\n\nimport logger from '../logger';\n\nclass environment {\n constructor(externalEnvironment, fileManagers) {\n this.fileManagers = fileManagers || [];\n externalEnvironment = externalEnvironment || {};\n\n const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator'];\n const requiredFunctions = [];\n const functions = requiredFunctions.concat(optionalFunctions);\n\n for (let i = 0; i < functions.length; i++) {\n const propName = functions[i];\n const environmentFunc = externalEnvironment[propName];\n if (environmentFunc) {\n this[propName] = environmentFunc.bind(externalEnvironment);\n } else if (i < requiredFunctions.length) {\n this.warn(`missing required function in environment - ${propName}`);\n }\n }\n }\n\n getFileManager(filename, currentDirectory, options, environment, isSync) {\n\n if (!filename) {\n logger.warn('getFileManager called with no filename.. Please report this issue. continuing.');\n }\n if (currentDirectory == null) {\n logger.warn('getFileManager called with null directory.. Please report this issue. continuing.');\n }\n\n let fileManagers = this.fileManagers;\n if (options.pluginManager) {\n fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers());\n }\n for (let i = fileManagers.length - 1; i >= 0 ; i--) {\n const fileManager = fileManagers[i];\n if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) {\n return fileManager;\n }\n }\n return null;\n }\n\n addFileManager(fileManager) {\n this.fileManagers.push(fileManager);\n }\n\n clearFileManagers() {\n this.fileManagers = [];\n }\n}\n\nexport default environment;\n","const abstractFileManager = () => {\n};\n\nabstractFileManager.prototype.getPath = filename => {\n let j = filename.lastIndexOf('?');\n if (j > 0) {\n filename = filename.slice(0, j);\n }\n j = filename.lastIndexOf('/');\n if (j < 0) {\n j = filename.lastIndexOf('\\\\');\n }\n if (j < 0) {\n return '';\n }\n return filename.slice(0, j + 1);\n};\n\nabstractFileManager.prototype.tryAppendExtension = (path, ext) => /(\\.[a-z]*$)|([\\?;].*)$/.test(path) ? path : path + ext;\n\nabstractFileManager.prototype.tryAppendLessExtension = function(path) {\n return this.tryAppendExtension(path, '.less');\n};\n\nabstractFileManager.prototype.supportsSync = () => false;\n\nabstractFileManager.prototype.alwaysMakePathsAbsolute = () => false;\n\nabstractFileManager.prototype.isPathAbsolute = filename => (/^(?:[a-z-]+:|\\/|\\\\|#)/i).test(filename);\n// TODO: pull out / replace?\nabstractFileManager.prototype.join = (basePath, laterPath) => {\n if (!basePath) {\n return laterPath;\n }\n return basePath + laterPath;\n};\n\nabstractFileManager.prototype.pathDiff = function pathDiff(url, baseUrl) {\n // diff between two paths to create a relative path\n\n const urlParts = this.extractUrlParts(url);\n\n const baseUrlParts = this.extractUrlParts(baseUrl);\n let i;\n let max;\n let urlDirectories;\n let baseUrlDirectories;\n let diff = '';\n if (urlParts.hostPart !== baseUrlParts.hostPart) {\n return '';\n }\n max = Math.max(baseUrlParts.directories.length, urlParts.directories.length);\n for (i = 0; i < max; i++) {\n if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; }\n }\n baseUrlDirectories = baseUrlParts.directories.slice(i);\n urlDirectories = urlParts.directories.slice(i);\n for (i = 0; i < baseUrlDirectories.length - 1; i++) {\n diff += '../';\n }\n for (i = 0; i < urlDirectories.length - 1; i++) {\n diff += `${urlDirectories[i]}/`;\n }\n return diff;\n};\n// helper function, not part of API\nabstractFileManager.prototype.extractUrlParts = function extractUrlParts(url, baseUrl) {\n // urlParts[1] = protocol://hostname/ OR /\n // urlParts[2] = / if path relative to host base\n // urlParts[3] = directories\n // urlParts[4] = filename\n // urlParts[5] = parameters\n\n const urlPartsRegex = /^((?:[a-z-]+:)?\\/{2}(?:[^\\/\\?#]*\\/)|([\\/\\\\]))?((?:[^\\/\\\\\\?#]*[\\/\\\\])*)([^\\/\\\\\\?#]*)([#\\?].*)?$/i;\n\n const urlParts = url.match(urlPartsRegex);\n const returner = {};\n let rawDirectories = [];\n const directories = [];\n let i;\n let baseUrlParts;\n\n if (!urlParts) {\n throw new Error(`Could not parse sheet href - '${url}'`);\n }\n\n // Stylesheets in IE don't always return the full path\n if (baseUrl && (!urlParts[1] || urlParts[2])) {\n baseUrlParts = baseUrl.match(urlPartsRegex);\n if (!baseUrlParts) {\n throw new Error(`Could not parse page url - '${baseUrl}'`);\n }\n urlParts[1] = urlParts[1] || baseUrlParts[1] || '';\n if (!urlParts[2]) {\n urlParts[3] = baseUrlParts[3] + urlParts[3];\n }\n }\n\n if (urlParts[3]) {\n rawDirectories = urlParts[3].replace(/\\\\/g, '/').split('/');\n\n // collapse '..' and skip '.'\n for (i = 0; i < rawDirectories.length; i++) {\n\n if (rawDirectories[i] === '..') {\n directories.pop();\n }\n else if (rawDirectories[i] !== '.') {\n directories.push(rawDirectories[i]);\n }\n \n }\n }\n\n returner.hostPart = urlParts[1];\n returner.directories = directories;\n returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/');\n returner.path = (urlParts[1] || '') + directories.join('/');\n returner.filename = urlParts[4];\n returner.fileUrl = returner.path + (urlParts[4] || '');\n returner.url = returner.fileUrl + (urlParts[5] || '');\n return returner;\n};\n\nexport default abstractFileManager;\n","import functionRegistry from '../functions/function-registry';\nimport LessError from '../less-error';\n\nclass AbstractPluginLoader {\n constructor() {\n // Implemented by Node.js plugin loader\n this.require = () => null\n }\n\n evalPlugin(contents, context, imports, pluginOptions, fileInfo) {\n let loader;\n let registry;\n let pluginObj;\n let localModule;\n let pluginManager;\n let filename;\n let result;\n\n pluginManager = context.pluginManager;\n\n if (fileInfo) {\n if (typeof fileInfo === 'string') {\n filename = fileInfo;\n }\n else {\n filename = fileInfo.filename;\n }\n }\n const shortname = (new this.less.FileManager()).extractUrlParts(filename).filename;\n\n if (filename) {\n pluginObj = pluginManager.get(filename);\n\n if (pluginObj) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n return pluginObj;\n }\n }\n localModule = {\n exports: {},\n pluginManager,\n fileInfo\n };\n registry = functionRegistry.create();\n\n const registerPlugin = obj => {\n pluginObj = obj;\n };\n\n try {\n loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents);\n loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo);\n }\n catch (e) {\n return new LessError(e, imports, filename);\n }\n\n if (!pluginObj) {\n pluginObj = localModule.exports;\n }\n pluginObj = this.validatePlugin(pluginObj, filename, shortname);\n\n if (pluginObj instanceof LessError) {\n return pluginObj;\n }\n\n if (pluginObj) {\n pluginObj.imports = imports;\n pluginObj.filename = filename;\n\n // For < 3.x (or unspecified minVersion) - setOptions() before install()\n if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n\n if (result) {\n return result;\n }\n }\n\n // Run on first load\n pluginManager.addPlugin(pluginObj, fileInfo.filename, registry);\n pluginObj.functions = registry.getLocalFunctions();\n\n // Need to call setOptions again because the pluginObj might have functions\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n\n // Run every @plugin call\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n\n }\n else {\n return new LessError({ message: 'Not a valid plugin' }, imports, filename);\n }\n\n return pluginObj;\n }\n\n trySetOptions(plugin, filename, name, options) {\n if (options && !plugin.setOptions) {\n return new LessError({\n message: `Options have been provided but the plugin ${name} does not support any options.`\n });\n }\n try {\n plugin.setOptions && plugin.setOptions(options);\n }\n catch (e) {\n return new LessError(e);\n }\n }\n\n validatePlugin(plugin, filename, name) {\n if (plugin) {\n // support plugins being a function\n // so that the plugin can be more usable programmatically\n if (typeof plugin === 'function') {\n plugin = new plugin();\n }\n\n if (plugin.minVersion) {\n if (this.compareVersion(plugin.minVersion, this.less.version) < 0) {\n return new LessError({\n message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}`\n });\n }\n }\n return plugin;\n }\n return null;\n }\n\n compareVersion(aVersion, bVersion) {\n if (typeof aVersion === 'string') {\n aVersion = aVersion.match(/^(\\d+)\\.?(\\d+)?\\.?(\\d+)?/);\n aVersion.shift();\n }\n for (let i = 0; i < aVersion.length; i++) {\n if (aVersion[i] !== bVersion[i]) {\n return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1;\n }\n }\n return 0;\n }\n\n versionToString(version) {\n let versionString = '';\n for (let i = 0; i < version.length; i++) {\n versionString += (versionString ? '.' : '') + version[i];\n }\n return versionString;\n }\n\n printUsage(plugins) {\n for (let i = 0; i < plugins.length; i++) {\n const plugin = plugins[i];\n if (plugin.printUsage) {\n plugin.printUsage();\n }\n }\n }\n}\n\nexport default AbstractPluginLoader;\n\n","import tree from '../tree';\nconst _visitArgs = { visitDeeper: true };\nlet _hasIndexed = false;\n\nfunction _noop(node) {\n return node;\n}\n\nfunction indexNodeTypes(parent, ticker) {\n // add .typeIndex to tree node types for lookup table\n let key;\n\n let child;\n for (key in parent) { \n /* eslint guard-for-in: 0 */\n child = parent[key];\n switch (typeof child) {\n case 'function':\n // ignore bound functions directly on tree which do not have a prototype\n // or aren't nodes\n if (child.prototype && child.prototype.type) {\n child.prototype.typeIndex = ticker++;\n }\n break;\n case 'object':\n ticker = indexNodeTypes(child, ticker);\n break;\n \n }\n }\n return ticker;\n}\n\nclass Visitor {\n constructor(implementation) {\n this._implementation = implementation;\n this._visitInCache = {};\n this._visitOutCache = {};\n\n if (!_hasIndexed) {\n indexNodeTypes(tree, 1);\n _hasIndexed = true;\n }\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n\n const nodeTypeIndex = node.typeIndex;\n if (!nodeTypeIndex) {\n // MixinCall args aren't a node type?\n if (node.value && node.value.typeIndex) {\n this.visit(node.value);\n }\n return node;\n }\n\n const impl = this._implementation;\n let func = this._visitInCache[nodeTypeIndex];\n let funcOut = this._visitOutCache[nodeTypeIndex];\n const visitArgs = _visitArgs;\n let fnName;\n\n visitArgs.visitDeeper = true;\n\n if (!func) {\n fnName = `visit${node.type}`;\n func = impl[fnName] || _noop;\n funcOut = impl[`${fnName}Out`] || _noop;\n this._visitInCache[nodeTypeIndex] = func;\n this._visitOutCache[nodeTypeIndex] = funcOut;\n }\n\n if (func !== _noop) {\n const newNode = func.call(impl, node, visitArgs);\n if (node && impl.isReplacing) {\n node = newNode;\n }\n }\n\n if (visitArgs.visitDeeper && node && node.accept) {\n node.accept(this);\n }\n\n if (funcOut != _noop) {\n funcOut.call(impl, node);\n }\n\n return node;\n }\n\n visitArray(nodes, nonReplacing) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n\n // Non-replacing\n if (nonReplacing || !this._implementation.isReplacing) {\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n // Replacing\n const out = [];\n for (i = 0; i < cnt; i++) {\n const evald = this.visit(nodes[i]);\n if (evald === undefined) { continue; }\n if (!evald.splice) {\n out.push(evald);\n } else if (evald.length) {\n this.flatten(evald, out);\n }\n }\n return out;\n }\n\n flatten(arr, out) {\n if (!out) {\n out = [];\n }\n\n let cnt;\n let i;\n let item;\n let nestedCnt;\n let j;\n let nestedItem;\n\n for (i = 0, cnt = arr.length; i < cnt; i++) {\n item = arr[i];\n if (item === undefined) {\n continue;\n }\n if (!item.splice) {\n out.push(item);\n continue;\n }\n\n for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) {\n nestedItem = item[j];\n if (nestedItem === undefined) {\n continue;\n }\n if (!nestedItem.splice) {\n out.push(nestedItem);\n } else if (nestedItem.length) {\n this.flatten(nestedItem, out);\n }\n }\n }\n\n return out;\n }\n}\n\nexport default Visitor;\n","class ImportSequencer {\n constructor(onSequencerEmpty) {\n this.imports = [];\n this.variableImports = [];\n this._onSequencerEmpty = onSequencerEmpty;\n this._currentDepth = 0;\n }\n\n addImport(callback) {\n const importSequencer = this;\n\n const importItem = {\n callback,\n args: null,\n isReady: false\n };\n\n this.imports.push(importItem);\n return function(...args) {\n importItem.args = Array.prototype.slice.call(args, 0);\n importItem.isReady = true;\n importSequencer.tryRun();\n };\n }\n\n addVariableImport(callback) {\n this.variableImports.push(callback);\n }\n\n tryRun() {\n this._currentDepth++;\n try {\n while (true) {\n while (this.imports.length > 0) {\n const importItem = this.imports[0];\n if (!importItem.isReady) {\n return;\n }\n this.imports = this.imports.slice(1);\n importItem.callback.apply(null, importItem.args);\n }\n if (this.variableImports.length === 0) {\n break;\n }\n const variableImport = this.variableImports[0];\n this.variableImports = this.variableImports.slice(1);\n variableImport();\n }\n } finally {\n this._currentDepth--;\n }\n if (this._currentDepth === 0 && this._onSequencerEmpty) {\n this._onSequencerEmpty();\n }\n }\n}\n\nexport default ImportSequencer;\n","import contexts from '../contexts';\nimport Visitor from './visitor';\nimport ImportSequencer from './import-sequencer';\nimport * as utils from '../utils';\n\nconst ImportVisitor = function(importer, finish) {\n\n this._visitor = new Visitor(this);\n this._importer = importer;\n this._finish = finish;\n this.context = new contexts.Eval();\n this.importCount = 0;\n this.onceFileDetectionMap = {};\n this.recursionDetector = {};\n this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this));\n};\n\nImportVisitor.prototype = {\n isReplacing: false,\n run: function (root) {\n try {\n // process the contents\n this._visitor.visit(root);\n }\n catch (e) {\n this.error = e;\n }\n\n this.isFinished = true;\n this._sequencer.tryRun();\n },\n _onSequencerEmpty: function() {\n if (!this.isFinished) {\n return;\n }\n this._finish(this.error);\n },\n visitImport: function (importNode, visitArgs) {\n const inlineCSS = importNode.options.inline;\n\n if (!importNode.css || inlineCSS) {\n\n const context = new contexts.Eval(this.context, utils.copyArray(this.context.frames));\n const importParent = context.frames[0];\n\n this.importCount++;\n if (importNode.isVariableImport()) {\n this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent));\n } else {\n this.processImportNode(importNode, context, importParent);\n }\n }\n visitArgs.visitDeeper = false;\n },\n processImportNode: function(importNode, context, importParent) {\n let evaldImportNode;\n const inlineCSS = importNode.options.inline;\n\n try {\n evaldImportNode = importNode.evalForImport(context);\n } catch (e) {\n if (!e.filename) { e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename; }\n // attempt to eval properly and treat as css\n importNode.css = true;\n // if that fails, this error will be thrown\n importNode.error = e;\n }\n\n if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) {\n if (evaldImportNode.options.multiple) {\n context.importMultiple = true;\n }\n\n // try appending if we haven't determined if it is css or not\n const tryAppendLessExtension = evaldImportNode.css === undefined;\n\n for (let i = 0; i < importParent.rules.length; i++) {\n if (importParent.rules[i] === importNode) {\n importParent.rules[i] = evaldImportNode;\n break;\n }\n }\n\n const onImported = this.onImported.bind(this, evaldImportNode, context);\n const sequencedOnImported = this._sequencer.addImport(onImported);\n\n this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(),\n evaldImportNode.options, sequencedOnImported);\n } else {\n this.importCount--;\n if (this.isFinished) {\n this._sequencer.tryRun();\n }\n }\n },\n onImported: function (importNode, context, e, root, importedAtRoot, fullPath) {\n if (e) {\n if (!e.filename) {\n e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename;\n }\n this.error = e;\n }\n\n const importVisitor = this;\n const inlineCSS = importNode.options.inline;\n const isPlugin = importNode.options.isPlugin;\n const isOptional = importNode.options.optional;\n const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector;\n\n if (!context.importMultiple) {\n if (duplicateImport) {\n importNode.skip = true;\n } else {\n importNode.skip = () => {\n if (fullPath in importVisitor.onceFileDetectionMap) {\n return true;\n }\n importVisitor.onceFileDetectionMap[fullPath] = true;\n return false;\n };\n }\n }\n\n if (!fullPath && isOptional) {\n importNode.skip = true;\n }\n\n if (root) {\n importNode.root = root;\n importNode.importedFilename = fullPath;\n\n if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) {\n importVisitor.recursionDetector[fullPath] = true;\n\n const oldContext = this.context;\n this.context = context;\n try {\n this._visitor.visit(root);\n } catch (e) {\n this.error = e;\n }\n this.context = oldContext;\n }\n }\n\n importVisitor.importCount--;\n\n if (importVisitor.isFinished) {\n importVisitor._sequencer.tryRun();\n }\n },\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.unshift(declNode);\n } else {\n visitArgs.visitDeeper = false;\n }\n },\n visitDeclarationOut: function(declNode) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.shift();\n }\n },\n visitAtRule: function (atRuleNode, visitArgs) {\n this.context.frames.unshift(atRuleNode);\n },\n visitAtRuleOut: function (atRuleNode) {\n this.context.frames.shift();\n },\n visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {\n this.context.frames.unshift(mixinDefinitionNode);\n },\n visitMixinDefinitionOut: function (mixinDefinitionNode) {\n this.context.frames.shift();\n },\n visitRuleset: function (rulesetNode, visitArgs) {\n this.context.frames.unshift(rulesetNode);\n },\n visitRulesetOut: function (rulesetNode) {\n this.context.frames.shift();\n },\n visitMedia: function (mediaNode, visitArgs) {\n this.context.frames.unshift(mediaNode.rules[0]);\n },\n visitMediaOut: function (mediaNode) {\n this.context.frames.shift();\n }\n};\nexport default ImportVisitor;\n","class SetTreeVisibilityVisitor {\n constructor(visible) {\n this.visible = visible;\n }\n\n run(root) {\n this.visit(root);\n }\n\n visitArray(nodes) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n if (node.constructor === Array) {\n return this.visitArray(node);\n }\n\n if (!node.blocksVisibility || node.blocksVisibility()) {\n return node;\n }\n if (this.visible) {\n node.ensureVisibility();\n } else {\n node.ensureInvisibility();\n }\n\n node.accept(this);\n return node;\n }\n}\n\nexport default SetTreeVisibilityVisitor;","import tree from '../tree';\nimport Visitor from './visitor';\nimport logger from '../logger';\nimport * as utils from '../utils';\n\n/* jshint loopfunc:true */\n\nclass ExtendFinderVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n this.contexts = [];\n this.allExtendsStack = [[]];\n }\n\n run(root) {\n root = this._visitor.visit(root);\n root.allExtends = this.allExtendsStack[0];\n return root;\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n\n let i;\n let j;\n let extend;\n const allSelectorsExtendList = [];\n let extendList;\n\n // get &:extend(.a); rules which apply to all selectors in this ruleset\n const rules = rulesetNode.rules;\n\n const ruleCnt = rules ? rules.length : 0;\n for (i = 0; i < ruleCnt; i++) {\n if (rulesetNode.rules[i] instanceof tree.Extend) {\n allSelectorsExtendList.push(rules[i]);\n rulesetNode.extendOnEveryPath = true;\n }\n }\n\n // now find every selector and apply the extends that apply to all extends\n // and the ones which apply to an individual extend\n const paths = rulesetNode.paths;\n for (i = 0; i < paths.length; i++) {\n const selectorPath = paths[i];\n const selector = selectorPath[selectorPath.length - 1];\n const selExtendList = selector.extendList;\n\n extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList)\n : allSelectorsExtendList;\n\n if (extendList) {\n extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone());\n }\n\n for (j = 0; j < extendList.length; j++) {\n this.foundExtends = true;\n extend = extendList[j];\n extend.findSelfSelectors(selectorPath);\n extend.ruleset = rulesetNode;\n if (j === 0) { extend.firstExtendOnThisSelectorPath = true; }\n this.allExtendsStack[this.allExtendsStack.length - 1].push(extend);\n }\n }\n\n this.contexts.push(rulesetNode.selectors);\n }\n\n visitRulesetOut(rulesetNode) {\n if (!rulesetNode.root) {\n this.contexts.length = this.contexts.length - 1;\n }\n }\n\n visitMedia(mediaNode, visitArgs) {\n mediaNode.allExtends = [];\n this.allExtendsStack.push(mediaNode.allExtends);\n }\n\n visitMediaOut(mediaNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n atRuleNode.allExtends = [];\n this.allExtendsStack.push(atRuleNode.allExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n}\n\nclass ProcessExtendsVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n const extendFinder = new ExtendFinderVisitor();\n this.extendIndices = {};\n extendFinder.run(root);\n if (!extendFinder.foundExtends) { return root; }\n root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends));\n this.allExtendsStack = [root.allExtends];\n const newRoot = this._visitor.visit(root);\n this.checkExtendsForNonMatched(root.allExtends);\n return newRoot;\n }\n\n checkExtendsForNonMatched(extendList) {\n const indices = this.extendIndices;\n extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => {\n let selector = '_unknown_';\n try {\n selector = extend.selector.toCSS({});\n }\n catch (_) {}\n\n if (!indices[`${extend.index} ${selector}`]) {\n indices[`${extend.index} ${selector}`] = true;\n logger.warn(`extend '${selector}' has no matches`);\n }\n });\n }\n\n doExtendChaining(extendsList, extendsListTarget, iterationCount) {\n //\n // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering\n // and pasting the selector we would do normally, but we are also adding an extend with the same target selector\n // this means this new extend can then go and alter other extends\n //\n // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors\n // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already\n // processed if we look at each selector at a time, as is done in visitRuleset\n\n let extendIndex;\n\n let targetExtendIndex;\n let matches;\n const extendsToAdd = [];\n let newSelector;\n const extendVisitor = this;\n let selectorPath;\n let extend;\n let targetExtend;\n let newExtend;\n\n iterationCount = iterationCount || 0;\n\n // loop through comparing every extend with every target extend.\n // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place\n // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one\n // and the second is the target.\n // the separation into two lists allows us to process a subset of chains with a bigger set, as is the\n // case when processing media queries\n for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) {\n for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) {\n\n extend = extendsList[extendIndex];\n targetExtend = extendsListTarget[targetExtendIndex];\n\n // look for circular references\n if ( extend.parent_ids.indexOf( targetExtend.object_id ) >= 0 ) { continue; }\n\n // find a match in the target extends self selector (the bit before :extend)\n selectorPath = [targetExtend.selfSelectors[0]];\n matches = extendVisitor.findMatch(extend, selectorPath);\n\n if (matches.length) {\n extend.hasFoundMatches = true;\n\n // we found a match, so for each self selector..\n extend.selfSelectors.forEach(selfSelector => {\n const info = targetExtend.visibilityInfo();\n\n // process the extend as usual\n newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible());\n\n // but now we create a new extend from it\n newExtend = new(tree.Extend)(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info);\n newExtend.selfSelectors = newSelector;\n\n // add the extend onto the list of extends for that selector\n newSelector[newSelector.length - 1].extendList = [newExtend];\n\n // record that we need to add it.\n extendsToAdd.push(newExtend);\n newExtend.ruleset = targetExtend.ruleset;\n\n // remember its parents for circular references\n newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids);\n\n // only process the selector once.. if we have :extend(.a,.b) then multiple\n // extends will look at the same selector path, so when extending\n // we know that any others will be duplicates in terms of what is added to the css\n if (targetExtend.firstExtendOnThisSelectorPath) {\n newExtend.firstExtendOnThisSelectorPath = true;\n targetExtend.ruleset.paths.push(newSelector);\n }\n });\n }\n }\n }\n\n if (extendsToAdd.length) {\n // try to detect circular references to stop a stack overflow.\n // may no longer be needed.\n this.extendChainCount++;\n if (iterationCount > 100) {\n let selectorOne = '{unable to calculate}';\n let selectorTwo = '{unable to calculate}';\n try {\n selectorOne = extendsToAdd[0].selfSelectors[0].toCSS();\n selectorTwo = extendsToAdd[0].selector.toCSS();\n }\n catch (e) {}\n throw { message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})`};\n }\n\n // now process the new extends on the existing rules so that we can handle a extending b extending c extending\n // d extending e...\n return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1));\n } else {\n return extendsToAdd;\n }\n }\n\n visitDeclaration(ruleNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitSelector(selectorNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n let matches;\n let pathIndex;\n let extendIndex;\n const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1];\n const selectorsToAdd = [];\n const extendVisitor = this;\n let selectorPath;\n\n // look at each selector path in the ruleset, find any extend matches and then copy, find and replace\n\n for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) {\n for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) {\n selectorPath = rulesetNode.paths[pathIndex];\n\n // extending extends happens initially, before the main pass\n if (rulesetNode.extendOnEveryPath) { continue; }\n const extendList = selectorPath[selectorPath.length - 1].extendList;\n if (extendList && extendList.length) { continue; }\n\n matches = this.findMatch(allExtends[extendIndex], selectorPath);\n\n if (matches.length) {\n allExtends[extendIndex].hasFoundMatches = true;\n\n allExtends[extendIndex].selfSelectors.forEach(selfSelector => {\n let extendedSelectors;\n extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible());\n selectorsToAdd.push(extendedSelectors);\n });\n }\n }\n }\n rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd);\n }\n\n findMatch(extend, haystackSelectorPath) {\n //\n // look through the haystack selector path to try and find the needle - extend.selector\n // returns an array of selector matches that can then be replaced\n //\n let haystackSelectorIndex;\n\n let hackstackSelector;\n let hackstackElementIndex;\n let haystackElement;\n let targetCombinator;\n let i;\n const extendVisitor = this;\n const needleElements = extend.selector.elements;\n const potentialMatches = [];\n let potentialMatch;\n const matches = [];\n\n // loop through the haystack elements\n for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) {\n hackstackSelector = haystackSelectorPath[haystackSelectorIndex];\n\n for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) {\n\n haystackElement = hackstackSelector.elements[hackstackElementIndex];\n\n // if we allow elements before our match we can add a potential match every time. otherwise only at the first element.\n if (extend.allowBefore || (haystackSelectorIndex === 0 && hackstackElementIndex === 0)) {\n potentialMatches.push({pathIndex: haystackSelectorIndex, index: hackstackElementIndex, matched: 0,\n initialCombinator: haystackElement.combinator});\n }\n\n for (i = 0; i < potentialMatches.length; i++) {\n potentialMatch = potentialMatches[i];\n\n // selectors add \" \" onto the first element. When we use & it joins the selectors together, but if we don't\n // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to\n // work out what the resulting combinator will be\n targetCombinator = haystackElement.combinator.value;\n if (targetCombinator === '' && hackstackElementIndex === 0) {\n targetCombinator = ' ';\n }\n\n // if we don't match, null our match to indicate failure\n if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) ||\n (potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator)) {\n potentialMatch = null;\n } else {\n potentialMatch.matched++;\n }\n\n // if we are still valid and have finished, test whether we have elements after and whether these are allowed\n if (potentialMatch) {\n potentialMatch.finished = potentialMatch.matched === needleElements.length;\n if (potentialMatch.finished &&\n (!extend.allowAfter &&\n (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length))) {\n potentialMatch = null;\n }\n }\n // if null we remove, if not, we are still valid, so either push as a valid match or continue\n if (potentialMatch) {\n if (potentialMatch.finished) {\n potentialMatch.length = needleElements.length;\n potentialMatch.endPathIndex = haystackSelectorIndex;\n potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match\n potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again\n matches.push(potentialMatch);\n }\n } else {\n potentialMatches.splice(i, 1);\n i--;\n }\n }\n }\n }\n return matches;\n }\n\n isElementValuesEqual(elementValue1, elementValue2) {\n if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') {\n return elementValue1 === elementValue2;\n }\n if (elementValue1 instanceof tree.Attribute) {\n if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) {\n return false;\n }\n if (!elementValue1.value || !elementValue2.value) {\n if (elementValue1.value || elementValue2.value) {\n return false;\n }\n return true;\n }\n elementValue1 = elementValue1.value.value || elementValue1.value;\n elementValue2 = elementValue2.value.value || elementValue2.value;\n return elementValue1 === elementValue2;\n }\n elementValue1 = elementValue1.value;\n elementValue2 = elementValue2.value;\n if (elementValue1 instanceof tree.Selector) {\n if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) {\n return false;\n }\n for (let i = 0; i < elementValue1.elements.length; i++) {\n if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) {\n if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) {\n return false;\n }\n }\n if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) {\n return false;\n }\n }\n return true;\n }\n return false;\n }\n\n extendSelector(matches, selectorPath, replacementSelector, isVisible) {\n // for a set of matches, replace each match with the replacement selector\n\n let currentSelectorPathIndex = 0;\n\n let currentSelectorPathElementIndex = 0;\n let path = [];\n let matchIndex;\n let selector;\n let firstElement;\n let match;\n let newElements;\n\n for (matchIndex = 0; matchIndex < matches.length; matchIndex++) {\n match = matches[matchIndex];\n selector = selectorPath[match.pathIndex];\n firstElement = new tree.Element(\n match.initialCombinator,\n replacementSelector.elements[0].value,\n replacementSelector.elements[0].isVariable,\n replacementSelector.elements[0].getIndex(),\n replacementSelector.elements[0].fileInfo()\n );\n\n if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n\n newElements = selector.elements\n .slice(currentSelectorPathElementIndex, match.index)\n .concat([firstElement])\n .concat(replacementSelector.elements.slice(1));\n\n if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) {\n path[path.length - 1].elements =\n path[path.length - 1].elements.concat(newElements);\n } else {\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex));\n\n path.push(new tree.Selector(\n newElements\n ));\n }\n currentSelectorPathIndex = match.endPathIndex;\n currentSelectorPathElementIndex = match.endPathElementIndex;\n if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) {\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n }\n\n if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathIndex++;\n }\n\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length));\n path = path.map(currentValue => {\n // we can re-use elements here, because the visibility property matters only for selectors\n const derived = currentValue.createDerived(currentValue.elements);\n if (isVisible) {\n derived.ensureVisibility();\n } else {\n derived.ensureInvisibility();\n }\n return derived;\n });\n return path;\n }\n\n visitMedia(mediaNode, visitArgs) {\n let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitMediaOut(mediaNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n}\n\nexport default ProcessExtendsVisitor;\n","import Visitor from './visitor';\n\nclass JoinSelectorVisitor {\n constructor() {\n this.contexts = [[]];\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n return this._visitor.visit(root);\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n const paths = [];\n let selectors;\n\n this.contexts.push(paths);\n\n if (!rulesetNode.root) {\n selectors = rulesetNode.selectors;\n if (selectors) {\n selectors = selectors.filter(selector => selector.getIsOutput());\n rulesetNode.selectors = selectors.length ? selectors : (selectors = null);\n if (selectors) { rulesetNode.joinSelectors(paths, context, selectors); }\n }\n if (!selectors) { rulesetNode.rules = null; }\n rulesetNode.paths = paths;\n }\n }\n\n visitRulesetOut(rulesetNode) {\n this.contexts.length = this.contexts.length - 1;\n }\n\n visitMedia(mediaNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia);\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n if (atRuleNode.rules && atRuleNode.rules.length) {\n atRuleNode.rules[0].root = (atRuleNode.isRooted || context.length === 0 || null);\n }\n }\n}\n\nexport default JoinSelectorVisitor;\n","import tree from '../tree';\nimport Visitor from './visitor';\n\nclass CSSVisitorUtils {\n constructor(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n }\n\n containsSilentNonBlockedChild(bodyRules) {\n let rule;\n if (!bodyRules) {\n return false;\n }\n for (let r = 0; r < bodyRules.length; r++) {\n rule = bodyRules[r];\n if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) {\n // the atrule contains something that was referenced (likely by extend)\n // therefore it needs to be shown in output too\n return true;\n }\n }\n return false;\n }\n\n keepOnlyVisibleChilds(owner) {\n if (owner && owner.rules) {\n owner.rules = owner.rules.filter(thing => thing.isVisible());\n }\n }\n\n isEmpty(owner) {\n return (owner && owner.rules) \n ? (owner.rules.length === 0) : true;\n }\n\n hasVisibleSelector(rulesetNode) {\n return (rulesetNode && rulesetNode.paths)\n ? (rulesetNode.paths.length > 0) : false;\n }\n\n resolveVisibility(node, originalRules) {\n if (!node.blocksVisibility()) {\n if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) {\n return ;\n }\n\n return node;\n }\n\n const compiledRulesBody = node.rules[0];\n this.keepOnlyVisibleChilds(compiledRulesBody);\n\n if (this.isEmpty(compiledRulesBody)) {\n return ;\n }\n\n node.ensureVisibility();\n node.removeVisibilityBlock();\n\n return node;\n }\n\n isVisibleRuleset(rulesetNode) {\n if (rulesetNode.firstRoot) {\n return true;\n }\n\n if (this.isEmpty(rulesetNode)) {\n return false;\n }\n\n if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) {\n return false;\n }\n\n return true;\n }\n}\n\nconst ToCSSVisitor = function(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n this.utils = new CSSVisitorUtils(context);\n};\n\nToCSSVisitor.prototype = {\n isReplacing: true,\n run: function (root) {\n return this._visitor.visit(root);\n },\n\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.blocksVisibility() || declNode.variable) {\n return;\n }\n return declNode;\n },\n\n visitMixinDefinition: function (mixinNode, visitArgs) {\n // mixin definitions do not get eval'd - this means they keep state\n // so we have to clear that state here so it isn't used if toCSS is called twice\n mixinNode.frames = [];\n },\n\n visitExtend: function (extendNode, visitArgs) {\n },\n\n visitComment: function (commentNode, visitArgs) {\n if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) {\n return;\n }\n return commentNode;\n },\n\n visitMedia: function(mediaNode, visitArgs) {\n const originalRules = mediaNode.rules[0].rules;\n mediaNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n return this.utils.resolveVisibility(mediaNode, originalRules);\n },\n\n visitImport: function (importNode, visitArgs) {\n if (importNode.blocksVisibility()) {\n return ;\n }\n return importNode;\n },\n\n visitAtRule: function(atRuleNode, visitArgs) {\n if (atRuleNode.rules && atRuleNode.rules.length) {\n return this.visitAtRuleWithBody(atRuleNode, visitArgs);\n } else {\n return this.visitAtRuleWithoutBody(atRuleNode, visitArgs);\n }\n },\n\n visitAnonymous: function(anonymousNode, visitArgs) {\n if (!anonymousNode.blocksVisibility()) {\n anonymousNode.accept(this._visitor);\n return anonymousNode;\n }\n },\n\n visitAtRuleWithBody: function(atRuleNode, visitArgs) {\n // if there is only one nested ruleset and that one has no path, then it is\n // just fake ruleset\n function hasFakeRuleset(atRuleNode) {\n const bodyRules = atRuleNode.rules;\n return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0);\n }\n function getBodyRules(atRuleNode) {\n const nodeRules = atRuleNode.rules;\n if (hasFakeRuleset(atRuleNode)) {\n return nodeRules[0].rules;\n }\n\n return nodeRules;\n }\n // it is still true that it is only one ruleset in array\n // this is last such moment\n // process childs\n const originalRules = getBodyRules(atRuleNode);\n atRuleNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n if (!this.utils.isEmpty(atRuleNode)) {\n this._mergeRules(atRuleNode.rules[0].rules);\n }\n\n return this.utils.resolveVisibility(atRuleNode, originalRules);\n },\n\n visitAtRuleWithoutBody: function(atRuleNode, visitArgs) {\n if (atRuleNode.blocksVisibility()) {\n return;\n }\n\n if (atRuleNode.name === '@charset') {\n // Only output the debug info together with subsequent @charset definitions\n // a comment (or @media statement) before the actual @charset atrule would\n // be considered illegal css as it has to be on the first line\n if (this.charset) {\n if (atRuleNode.debugInfo) {\n const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\\n/g, '')} */\\n`);\n comment.debugInfo = atRuleNode.debugInfo;\n return this._visitor.visit(comment);\n }\n return;\n }\n this.charset = true;\n }\n\n return atRuleNode;\n },\n\n checkValidNodes: function(rules, isRoot) {\n if (!rules) {\n return;\n }\n\n for (let i = 0; i < rules.length; i++) {\n const ruleNode = rules[i];\n if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) {\n throw { message: 'Properties must be inside selector blocks. They cannot be in the root',\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode instanceof tree.Call) {\n throw { message: `Function '${ruleNode.name}' is undefined`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode.type && !ruleNode.allowRoot) {\n throw { message: `${ruleNode.type} node returned by a function is not valid here`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n }\n },\n\n visitRuleset: function (rulesetNode, visitArgs) {\n // at this point rulesets are nested into each other\n let rule;\n\n const rulesets = [];\n\n this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot);\n\n if (!rulesetNode.root) {\n // remove invisible paths\n this._compileRulesetPaths(rulesetNode);\n\n // remove rulesets from this ruleset body and compile them separately\n const nodeRules = rulesetNode.rules;\n\n let nodeRuleCnt = nodeRules ? nodeRules.length : 0;\n for (let i = 0; i < nodeRuleCnt; ) {\n rule = nodeRules[i];\n if (rule && rule.rules) {\n // visit because we are moving them out from being a child\n rulesets.push(this._visitor.visit(rule));\n nodeRules.splice(i, 1);\n nodeRuleCnt--;\n continue;\n }\n i++;\n }\n // accept the visitor to remove rules and refactor itself\n // then we can decide nogw whether we want it or not\n // compile body\n if (nodeRuleCnt > 0) {\n rulesetNode.accept(this._visitor);\n } else {\n rulesetNode.rules = null;\n }\n visitArgs.visitDeeper = false;\n } else { // if (! rulesetNode.root) {\n rulesetNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n }\n\n if (rulesetNode.rules) {\n this._mergeRules(rulesetNode.rules);\n this._removeDuplicateRules(rulesetNode.rules);\n }\n\n // now decide whether we keep the ruleset\n if (this.utils.isVisibleRuleset(rulesetNode)) {\n rulesetNode.ensureVisibility();\n rulesets.splice(0, 0, rulesetNode);\n }\n\n if (rulesets.length === 1) {\n return rulesets[0];\n }\n return rulesets;\n },\n\n _compileRulesetPaths: function(rulesetNode) {\n if (rulesetNode.paths) {\n rulesetNode.paths = rulesetNode.paths\n .filter(p => {\n let i;\n if (p[0].elements[0].combinator.value === ' ') {\n p[0].elements[0].combinator = new(tree.Combinator)('');\n }\n for (i = 0; i < p.length; i++) {\n if (p[i].isVisible() && p[i].getIsOutput()) {\n return true;\n }\n }\n return false;\n });\n }\n },\n\n _removeDuplicateRules: function(rules) {\n if (!rules) { return; }\n\n // remove duplicates\n const ruleCache = {};\n\n let ruleList;\n let rule;\n let i;\n\n for (i = rules.length - 1; i >= 0 ; i--) {\n rule = rules[i];\n if (rule instanceof tree.Declaration) {\n if (!ruleCache[rule.name]) {\n ruleCache[rule.name] = rule;\n } else {\n ruleList = ruleCache[rule.name];\n if (ruleList instanceof tree.Declaration) {\n ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)];\n }\n const ruleCSS = rule.toCSS(this._context);\n if (ruleList.indexOf(ruleCSS) !== -1) {\n rules.splice(i, 1);\n } else {\n ruleList.push(ruleCSS);\n }\n }\n }\n }\n },\n\n _mergeRules: function(rules) {\n if (!rules) {\n return; \n }\n\n const groups = {};\n const groupsArr = [];\n\n for (let i = 0; i < rules.length; i++) {\n const rule = rules[i];\n if (rule.merge) {\n const key = rule.name;\n groups[key] ? rules.splice(i--, 1) : \n groupsArr.push(groups[key] = []);\n groups[key].push(rule);\n }\n }\n\n groupsArr.forEach(group => {\n if (group.length > 0) {\n const result = group[0];\n let space = [];\n const comma = [new tree.Expression(space)];\n group.forEach(rule => {\n if ((rule.merge === '+') && (space.length > 0)) {\n comma.push(new tree.Expression(space = []));\n }\n space.push(rule.value);\n result.important = result.important || rule.important;\n });\n result.value = new tree.Value(comma);\n }\n });\n }\n};\n\nexport default ToCSSVisitor;\n","import Visitor from './visitor';\nimport ImportVisitor from './import-visitor';\nimport MarkVisibleSelectorsVisitor from './set-tree-visibility-visitor';\nimport ExtendVisitor from './extend-visitor';\nimport JoinSelectorVisitor from './join-selector-visitor';\nimport ToCSSVisitor from './to-css-visitor';\n\nexport default {\n Visitor,\n ImportVisitor,\n MarkVisibleSelectorsVisitor,\n ExtendVisitor,\n JoinSelectorVisitor,\n ToCSSVisitor\n};\n","import chunker from './chunker';\n\nexport default () => {\n let // Less input string\n input;\n\n let // current chunk\n j;\n\n const // holds state for backtracking\n saveStack = [];\n\n let // furthest index the parser has gone to\n furthest;\n\n let // if this is furthest we got to, this is the probably cause\n furthestPossibleErrorMessage;\n\n let // chunkified input\n chunks;\n\n let // current chunk\n current;\n\n let // index of current chunk, in `input`\n currentPos;\n\n const parserInput = {};\n const CHARCODE_SPACE = 32;\n const CHARCODE_TAB = 9;\n const CHARCODE_LF = 10;\n const CHARCODE_CR = 13;\n const CHARCODE_PLUS = 43;\n const CHARCODE_COMMA = 44;\n const CHARCODE_FORWARD_SLASH = 47;\n const CHARCODE_9 = 57;\n\n function skipWhitespace(length) {\n const oldi = parserInput.i;\n const oldj = j;\n const curr = parserInput.i - currentPos;\n const endIndex = parserInput.i + current.length - curr;\n const mem = (parserInput.i += length);\n const inp = input;\n let c;\n let nextChar;\n let comment;\n\n for (; parserInput.i < endIndex; parserInput.i++) {\n c = inp.charCodeAt(parserInput.i);\n\n if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) {\n nextChar = inp.charAt(parserInput.i + 1);\n if (nextChar === '/') {\n comment = {index: parserInput.i, isLineComment: true};\n let nextNewLine = inp.indexOf('\\n', parserInput.i + 2);\n if (nextNewLine < 0) {\n nextNewLine = endIndex;\n }\n parserInput.i = nextNewLine;\n comment.text = inp.substr(comment.index, parserInput.i - comment.index);\n parserInput.commentStore.push(comment);\n continue;\n } else if (nextChar === '*') {\n const nextStarSlash = inp.indexOf('*/', parserInput.i + 2);\n if (nextStarSlash >= 0) {\n comment = {\n index: parserInput.i,\n text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i),\n isLineComment: false\n };\n parserInput.i += comment.text.length - 1;\n parserInput.commentStore.push(comment);\n continue;\n }\n }\n break;\n }\n\n if ((c !== CHARCODE_SPACE) && (c !== CHARCODE_LF) && (c !== CHARCODE_TAB) && (c !== CHARCODE_CR)) {\n break;\n }\n }\n\n current = current.slice(length + parserInput.i - mem + curr);\n currentPos = parserInput.i;\n\n if (!current.length) {\n if (j < chunks.length - 1) {\n current = chunks[++j];\n skipWhitespace(0); // skip space at the beginning of a chunk\n return true; // things changed\n }\n parserInput.finished = true;\n }\n\n return oldi !== parserInput.i || oldj !== j;\n }\n\n parserInput.save = () => {\n currentPos = parserInput.i;\n saveStack.push( { current, i: parserInput.i, j });\n };\n parserInput.restore = possibleErrorMessage => {\n\n if (parserInput.i > furthest || (parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage)) {\n furthest = parserInput.i;\n furthestPossibleErrorMessage = possibleErrorMessage;\n }\n const state = saveStack.pop();\n current = state.current;\n currentPos = parserInput.i = state.i;\n j = state.j;\n };\n parserInput.forget = () => {\n saveStack.pop();\n };\n parserInput.isWhitespace = offset => {\n const pos = parserInput.i + (offset || 0);\n const code = input.charCodeAt(pos);\n return (code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF);\n };\n\n // Specialization of $(tok)\n parserInput.$re = tok => {\n if (parserInput.i > currentPos) {\n current = current.slice(parserInput.i - currentPos);\n currentPos = parserInput.i;\n }\n\n const m = tok.exec(current);\n if (!m) {\n return null;\n }\n\n skipWhitespace(m[0].length);\n if (typeof m === 'string') {\n return m;\n }\n\n return m.length === 1 ? m[0] : m;\n };\n\n parserInput.$char = tok => {\n if (input.charAt(parserInput.i) !== tok) {\n return null;\n }\n skipWhitespace(1);\n return tok;\n };\n\n parserInput.$str = tok => {\n const tokLength = tok.length;\n\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tokLength; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return null;\n }\n }\n\n skipWhitespace(tokLength);\n return tok;\n };\n\n parserInput.$quoted = loc => {\n const pos = loc || parserInput.i;\n const startChar = input.charAt(pos);\n\n if (startChar !== '\\'' && startChar !== '\"') {\n return;\n }\n const length = input.length;\n const currentPosition = pos;\n\n for (let i = 1; i + currentPosition < length; i++) {\n const nextChar = input.charAt(i + currentPosition);\n switch (nextChar) {\n case '\\\\':\n i++;\n continue;\n case '\\r':\n case '\\n':\n break;\n case startChar:\n const str = input.substr(currentPosition, i + 1);\n if (!loc && loc !== 0) {\n skipWhitespace(i + 1);\n return str\n }\n return [startChar, str];\n default:\n }\n }\n return null;\n };\n\n /**\n * Permissive parsing. Ignores everything except matching {} [] () and quotes\n * until matching token (outside of blocks)\n */\n parserInput.$parseUntil = tok => {\n let quote = '';\n let returnVal = null;\n let inComment = false;\n let blockDepth = 0;\n const blockStack = [];\n const parseGroups = [];\n const length = input.length;\n const startPos = parserInput.i;\n let lastPos = parserInput.i;\n let i = parserInput.i;\n let loop = true;\n let testChar;\n\n if (typeof tok === 'string') {\n testChar = char => char === tok\n } else {\n testChar = char => tok.test(char)\n }\n\n do {\n let prevChar;\n let nextChar = input.charAt(i);\n if (blockDepth === 0 && testChar(nextChar)) {\n returnVal = input.substr(lastPos, i - lastPos);\n if (returnVal) {\n parseGroups.push(returnVal);\n }\n else {\n parseGroups.push(' ');\n }\n returnVal = parseGroups;\n skipWhitespace(i - startPos);\n loop = false\n } else {\n if (inComment) {\n if (nextChar === '*' && \n input.charAt(i + 1) === '/') {\n i++;\n blockDepth--;\n inComment = false;\n }\n i++;\n continue;\n }\n switch (nextChar) {\n case '\\\\':\n i++;\n nextChar = input.charAt(i);\n parseGroups.push(input.substr(lastPos, i - lastPos + 1));\n lastPos = i + 1;\n break;\n case '/':\n if (input.charAt(i + 1) === '*') {\n i++;\n inComment = true;\n blockDepth++;\n }\n break;\n case '\\'':\n case '\"':\n quote = parserInput.$quoted(i);\n if (quote) {\n parseGroups.push(input.substr(lastPos, i - lastPos), quote);\n i += quote[1].length - 1;\n lastPos = i + 1;\n }\n else {\n skipWhitespace(i - startPos);\n returnVal = nextChar;\n loop = false;\n }\n break;\n case '{':\n blockStack.push('}');\n blockDepth++;\n break;\n case '(':\n blockStack.push(')');\n blockDepth++;\n break;\n case '[':\n blockStack.push(']');\n blockDepth++;\n break;\n case '}':\n case ')':\n case ']':\n const expected = blockStack.pop();\n if (nextChar === expected) {\n blockDepth--;\n } else {\n // move the parser to the error and return expected\n skipWhitespace(i - startPos);\n returnVal = expected;\n loop = false;\n }\n }\n i++;\n if (i > length) {\n loop = false;\n }\n }\n prevChar = nextChar;\n } while (loop);\n\n return returnVal ? returnVal : null;\n }\n\n parserInput.autoCommentAbsorb = true;\n parserInput.commentStore = [];\n parserInput.finished = false;\n\n // Same as $(), but don't change the state of the parser,\n // just return the match.\n parserInput.peek = tok => {\n if (typeof tok === 'string') {\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tok.length; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return false;\n }\n }\n return true;\n } else {\n return tok.test(current);\n }\n };\n\n // Specialization of peek()\n // TODO remove or change some currentChar calls to peekChar\n parserInput.peekChar = tok => input.charAt(parserInput.i) === tok;\n\n parserInput.currentChar = () => input.charAt(parserInput.i);\n\n parserInput.prevChar = () => input.charAt(parserInput.i - 1);\n\n parserInput.getInput = () => input;\n\n parserInput.peekNotNumeric = () => {\n const c = input.charCodeAt(parserInput.i);\n // Is the first char of the dimension 0-9, '.', '+' or '-'\n return (c > CHARCODE_9 || c < CHARCODE_PLUS) || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA;\n };\n\n parserInput.start = (str, chunkInput, failFunction) => {\n input = str;\n parserInput.i = j = currentPos = furthest = 0;\n\n // chunking apparently makes things quicker (but my tests indicate\n // it might actually make things slower in node at least)\n // and it is a non-perfect parse - it can't recognise\n // unquoted urls, meaning it can't distinguish comments\n // meaning comments with quotes or {}() in them get 'counted'\n // and then lead to parse errors.\n // In addition if the chunking chunks in the wrong place we might\n // not be able to parse a parser statement in one go\n // this is officially deprecated but can be switched on via an option\n // in the case it causes too much performance issues.\n if (chunkInput) {\n chunks = chunker(str, failFunction);\n } else {\n chunks = [str];\n }\n\n current = chunks[0];\n\n skipWhitespace(0);\n };\n\n parserInput.end = () => {\n let message;\n const isFinished = parserInput.i >= input.length;\n\n if (parserInput.i < furthest) {\n message = furthestPossibleErrorMessage;\n parserInput.i = furthest;\n }\n return {\n isFinished,\n furthest: parserInput.i,\n furthestPossibleErrorMessage: message,\n furthestReachedEnd: parserInput.i >= input.length - 1,\n furthestChar: input[parserInput.i]\n };\n };\n\n return parserInput;\n};\n","// Split the input into chunks.\nexport default (input, fail) => {\n const len = input.length;\n let level = 0;\n let parenLevel = 0;\n let lastOpening;\n let lastOpeningParen;\n let lastMultiComment;\n let lastMultiCommentEndBrace;\n const chunks = [];\n let emitFrom = 0;\n let chunkerCurrentIndex;\n let currentChunkStartIndex;\n let cc;\n let cc2;\n let matched;\n\n function emitChunk(force) {\n const len = chunkerCurrentIndex - emitFrom;\n if (((len < 512) && !force) || !len) {\n return;\n }\n chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1));\n emitFrom = chunkerCurrentIndex + 1;\n }\n\n for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc = input.charCodeAt(chunkerCurrentIndex);\n if (((cc >= 97) && (cc <= 122)) || (cc < 34)) {\n // a-z or whitespace\n continue;\n }\n\n switch (cc) {\n case 40: // (\n parenLevel++;\n lastOpeningParen = chunkerCurrentIndex;\n continue;\n case 41: // )\n if (--parenLevel < 0) {\n return fail('missing opening `(`', chunkerCurrentIndex);\n }\n continue;\n case 59: // ;\n if (!parenLevel) { emitChunk(); }\n continue;\n case 123: // {\n level++;\n lastOpening = chunkerCurrentIndex;\n continue;\n case 125: // }\n if (--level < 0) {\n return fail('missing opening `{`', chunkerCurrentIndex);\n }\n if (!level && !parenLevel) { emitChunk(); }\n continue;\n case 92: // \\\n if (chunkerCurrentIndex < len - 1) { chunkerCurrentIndex++; continue; }\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n case 34:\n case 39:\n case 96: // \", ' and `\n matched = 0;\n currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 > 96) { continue; }\n if (cc2 == cc) { matched = 1; break; }\n if (cc2 == 92) { // \\\n if (chunkerCurrentIndex == len - 1) {\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n }\n chunkerCurrentIndex++;\n }\n }\n if (matched) { continue; }\n return fail(`unmatched \\`${String.fromCharCode(cc)}\\``, currentChunkStartIndex);\n case 47: // /, check for comment\n if (parenLevel || (chunkerCurrentIndex == len - 1)) { continue; }\n cc2 = input.charCodeAt(chunkerCurrentIndex + 1);\n if (cc2 == 47) {\n // //, find lnfeed\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if ((cc2 <= 13) && ((cc2 == 10) || (cc2 == 13))) { break; }\n }\n } else if (cc2 == 42) {\n // /*, find */\n lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 == 125) { lastMultiCommentEndBrace = chunkerCurrentIndex; }\n if (cc2 != 42) { continue; }\n if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { break; }\n }\n if (chunkerCurrentIndex == len - 1) {\n return fail('missing closing `*/`', currentChunkStartIndex);\n }\n chunkerCurrentIndex++;\n }\n continue;\n case 42: // *, check for unmatched */\n if ((chunkerCurrentIndex < len - 1) && (input.charCodeAt(chunkerCurrentIndex + 1) == 47)) {\n return fail('unmatched `/*`', chunkerCurrentIndex);\n }\n continue;\n }\n }\n\n if (level !== 0) {\n if ((lastMultiComment > lastOpening) && (lastMultiCommentEndBrace > lastMultiComment)) {\n return fail('missing closing `}` or `*/`', lastOpening);\n } else {\n return fail('missing closing `}`', lastOpening);\n }\n } else if (parenLevel !== 0) {\n return fail('missing closing `)`', lastOpeningParen);\n }\n\n emitChunk(true);\n return chunks;\n};\n","import LessError from '../less-error';\nimport tree from '../tree';\nimport visitors from '../visitors';\nimport getParserInput from './parser-input';\nimport * as utils from '../utils';\nimport functionRegistry from '../functions/function-registry';\n\n//\n// less.js - parser\n//\n// A relatively straight-forward predictive parser.\n// There is no tokenization/lexing stage, the input is parsed\n// in one sweep.\n//\n// To make the parser fast enough to run in the browser, several\n// optimization had to be made:\n//\n// - Matching and slicing on a huge input is often cause of slowdowns.\n// The solution is to chunkify the input into smaller strings.\n// The chunks are stored in the `chunks` var,\n// `j` holds the current chunk index, and `currentPos` holds\n// the index of the current chunk in relation to `input`.\n// This gives us an almost 4x speed-up.\n//\n// - In many cases, we don't need to match individual tokens;\n// for example, if a value doesn't hold any variables, operations\n// or dynamic references, the parser can effectively 'skip' it,\n// treating it as a literal.\n// An example would be '1px solid #000' - which evaluates to itself,\n// we don't need to know what the individual components are.\n// The drawback, of course is that you don't get the benefits of\n// syntax-checking on the CSS. This gives us a 50% speed-up in the parser,\n// and a smaller speed-up in the code-gen.\n//\n//\n// Token matching is done with the `$` function, which either takes\n// a terminal string or regexp, or a non-terminal function to call.\n// It also takes care of moving all the indices forwards.\n//\n\nconst Parser = function Parser(context, imports, fileInfo) {\n let parsers;\n const parserInput = getParserInput();\n\n function error(msg, type) {\n throw new LessError(\n {\n index: parserInput.i,\n filename: fileInfo.filename,\n type: type || 'Syntax',\n message: msg\n },\n imports\n );\n }\n\n function expect(arg, msg) {\n // some older browsers return typeof 'function' for RegExp\n const result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg);\n if (result) {\n return result;\n }\n \n error(msg || (typeof arg === 'string'\n ? `expected '${arg}' got '${parserInput.currentChar()}'`\n : 'unexpected token'));\n }\n\n // Specialization of expect()\n function expectChar(arg, msg) {\n if (parserInput.$char(arg)) {\n return arg;\n }\n error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`);\n }\n\n function getDebugInfo(index) {\n const filename = fileInfo.filename;\n\n return {\n lineNumber: utils.getLocation(index, parserInput.getInput()).line + 1,\n fileName: filename\n };\n }\n\n /**\n * Used after initial parsing to create nodes on the fly\n * \n * @param {String} str - string to parse \n * @param {Array} parseList - array of parsers to run input through e.g. [\"value\", \"important\"]\n * @param {Number} currentIndex - start number to begin indexing\n * @param {Object} fileInfo - fileInfo to attach to created nodes\n */\n function parseNode(str, parseList, currentIndex, fileInfo, callback) {\n let result;\n const returnNodes = [];\n const parser = parserInput;\n\n try {\n parser.start(str, false, function fail(msg, index) {\n callback({\n message: msg,\n index: index + currentIndex\n });\n });\n for (let x = 0, p, i; (p = parseList[x]); x++) {\n i = parser.i;\n result = parsers[p]();\n if (result) {\n result._index = i + currentIndex;\n result._fileInfo = fileInfo;\n returnNodes.push(result);\n }\n else {\n returnNodes.push(null);\n }\n }\n\n const endInfo = parser.end();\n if (endInfo.isFinished) {\n callback(null, returnNodes);\n }\n else {\n callback(true, null);\n }\n } catch (e) {\n throw new LessError({\n index: e.index + currentIndex,\n message: e.message\n }, imports, fileInfo.filename);\n }\n }\n\n //\n // The Parser\n //\n return {\n parserInput,\n imports,\n fileInfo,\n parseNode,\n //\n // Parse an input string into an abstract syntax tree,\n // @param str A string containing 'less' markup\n // @param callback call `callback` when done.\n // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply\n //\n parse: function (str, callback, additionalData) {\n let root;\n let error = null;\n let globalVars;\n let modifyVars;\n let ignored;\n let preText = '';\n\n globalVars = (additionalData && additionalData.globalVars) ? `${Parser.serializeVars(additionalData.globalVars)}\\n` : '';\n modifyVars = (additionalData && additionalData.modifyVars) ? `\\n${Parser.serializeVars(additionalData.modifyVars)}` : '';\n\n if (context.pluginManager) {\n const preProcessors = context.pluginManager.getPreProcessors();\n for (let i = 0; i < preProcessors.length; i++) {\n str = preProcessors[i].process(str, { context, imports, fileInfo });\n }\n }\n\n if (globalVars || (additionalData && additionalData.banner)) {\n preText = ((additionalData && additionalData.banner) ? additionalData.banner : '') + globalVars;\n ignored = imports.contentsIgnoredChars;\n ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0;\n ignored[fileInfo.filename] += preText.length;\n }\n\n str = str.replace(/\\r\\n?/g, '\\n');\n // Remove potential UTF Byte Order Mark\n str = preText + str.replace(/^\\uFEFF/, '') + modifyVars;\n imports.contents[fileInfo.filename] = str;\n\n // Start with the primary rule.\n // The whole syntax tree is held under a Ruleset node,\n // with the `root` property set to true, so no `{}` are\n // output. The callback is called when the input is parsed.\n try {\n parserInput.start(str, context.chunkInput, function fail(msg, index) {\n throw new LessError({\n index,\n type: 'Parse',\n message: msg,\n filename: fileInfo.filename\n }, imports);\n });\n\n tree.Node.prototype.parse = this;\n root = new tree.Ruleset(null, this.parsers.primary());\n tree.Node.prototype.rootNode = root;\n root.root = true;\n root.firstRoot = true;\n root.functionRegistry = functionRegistry.inherit();\n \n } catch (e) {\n return callback(new LessError(e, imports, fileInfo.filename));\n }\n\n // If `i` is smaller than the `input.length - 1`,\n // it means the parser wasn't able to parse the whole\n // string, so we've got a parsing error.\n //\n // We try to extract a \\n delimited string,\n // showing the line where the parse error occurred.\n // We split it up into two parts (the part which parsed,\n // and the part which didn't), so we can color them differently.\n const endInfo = parserInput.end();\n if (!endInfo.isFinished) {\n\n let message = endInfo.furthestPossibleErrorMessage;\n\n if (!message) {\n message = 'Unrecognised input';\n if (endInfo.furthestChar === '}') {\n message += '. Possibly missing opening \\'{\\'';\n } else if (endInfo.furthestChar === ')') {\n message += '. Possibly missing opening \\'(\\'';\n } else if (endInfo.furthestReachedEnd) {\n message += '. Possibly missing something';\n }\n }\n\n error = new LessError({\n type: 'Parse',\n message,\n index: endInfo.furthest,\n filename: fileInfo.filename\n }, imports);\n }\n\n const finish = e => {\n e = error || e || imports.error;\n\n if (e) {\n if (!(e instanceof LessError)) {\n e = new LessError(e, imports, fileInfo.filename);\n }\n\n return callback(e);\n }\n else {\n return callback(null, root);\n }\n };\n\n if (context.processImports !== false) {\n new visitors.ImportVisitor(imports, finish)\n .run(root);\n } else {\n return finish();\n }\n },\n\n //\n // Here in, the parsing rules/functions\n //\n // The basic structure of the syntax tree generated is as follows:\n //\n // Ruleset -> Declaration -> Value -> Expression -> Entity\n //\n // Here's some Less code:\n //\n // .class {\n // color: #fff;\n // border: 1px solid #000;\n // width: @w + 4px;\n // > .child {...}\n // }\n //\n // And here's what the parse tree might look like:\n //\n // Ruleset (Selector '.class', [\n // Declaration (\"color\", Value ([Expression [Color #fff]]))\n // Declaration (\"border\", Value ([Expression [Dimension 1px][Keyword \"solid\"][Color #000]]))\n // Declaration (\"width\", Value ([Expression [Operation \" + \" [Variable \"@w\"][Dimension 4px]]]))\n // Ruleset (Selector [Element '>', '.child'], [...])\n // ])\n //\n // In general, most rules will try to parse a token with the `$re()` function, and if the return\n // value is truly, will return a new node, of the relevant type. Sometimes, we need to check\n // first, before parsing, that's when we use `peek()`.\n //\n parsers: parsers = {\n //\n // The `primary` rule is the *entry* and *exit* point of the parser.\n // The rules here can appear at any level of the parse tree.\n //\n // The recursive nature of the grammar is an interplay between the `block`\n // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,\n // as represented by this simplified grammar:\n //\n // primary → (ruleset | declaration)+\n // ruleset → selector+ block\n // block → '{' primary '}'\n //\n // Only at one point is the primary rule not called from the\n // block rule: at the root level.\n //\n primary: function () {\n const mixin = this.mixin;\n let root = [];\n let node;\n\n while (true) {\n while (true) {\n node = this.comment();\n if (!node) { break; }\n root.push(node);\n }\n // always process comments before deciding if finished\n if (parserInput.finished) {\n break;\n }\n if (parserInput.peek('}')) {\n break;\n }\n\n node = this.extendRule();\n if (node) {\n root = root.concat(node);\n continue;\n }\n\n node = mixin.definition() || this.declaration() || this.ruleset() ||\n mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule();\n if (node) {\n root.push(node);\n } else {\n let foundSemiColon = false;\n while (parserInput.$char(';')) {\n foundSemiColon = true;\n }\n if (!foundSemiColon) {\n break;\n }\n }\n }\n\n return root;\n },\n\n // comments are collected by the main parsing mechanism and then assigned to nodes\n // where the current structure allows it\n comment: function () {\n if (parserInput.commentStore.length) {\n const comment = parserInput.commentStore.shift();\n return new(tree.Comment)(comment.text, comment.isLineComment, comment.index, fileInfo);\n }\n },\n\n //\n // Entities are tokens which can be found inside an Expression\n //\n entities: {\n mixinLookup: function() {\n return parsers.mixin.call(true, true);\n },\n //\n // A string, which supports escaping \" and '\n //\n // \"milky way\" 'he\\'s the one!'\n //\n quoted: function (forceEscaped) {\n let str;\n const index = parserInput.i;\n let isEscaped = false;\n\n parserInput.save();\n if (parserInput.$char('~')) {\n isEscaped = true;\n } else if (forceEscaped) {\n parserInput.restore();\n return;\n }\n\n str = parserInput.$quoted();\n if (!str) {\n parserInput.restore();\n return;\n }\n parserInput.forget();\n\n return new(tree.Quoted)(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo);\n },\n\n //\n // A catch-all word, such as:\n //\n // black border-collapse\n //\n keyword: function () {\n const k = parserInput.$char('%') || parserInput.$re(/^\\[?(?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\\]?/);\n if (k) {\n return tree.Color.fromKeyword(k) || new(tree.Keyword)(k);\n }\n },\n\n //\n // A function call\n //\n // rgb(255, 0, 255)\n //\n // The arguments are parsed with the `entities.arguments` parser.\n //\n call: function () {\n let name;\n let args;\n let func;\n const index = parserInput.i;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (parserInput.peek(/^url\\(/i)) {\n return;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^([\\w-]+|%|progid:[\\w\\.]+)\\(/);\n if (!name) {\n parserInput.forget(); \n return;\n }\n\n name = name[1];\n func = this.customFuncCall(name);\n if (func) {\n args = func.parse();\n if (args && func.stop) {\n parserInput.forget();\n return args;\n }\n }\n\n args = this.arguments(args);\n\n if (!parserInput.$char(')')) {\n parserInput.restore('Could not parse call arguments or missing \\')\\'');\n return;\n }\n\n parserInput.forget();\n\n return new(tree.Call)(name, args, index, fileInfo);\n },\n \n //\n // Parsing rules for functions with non-standard args, e.g.:\n //\n // boolean(not(2 > 1))\n //\n // This is a quick prototype, to be modified/improved when\n // more custom-parsed funcs come (e.g. `selector(...)`)\n //\n\n customFuncCall: function (name) {\n /* Ideally the table is to be moved out of here for faster perf.,\n but it's quite tricky since it relies on all these `parsers`\n and `expect` available only here */\n return {\n alpha: f(parsers.ieAlpha, true),\n boolean: f(condition),\n 'if': f(condition)\n }[name.toLowerCase()];\n\n function f(parse, stop) {\n return {\n parse, // parsing function\n stop // when true - stop after parse() and return its result, \n // otherwise continue for plain args\n };\n }\n \n function condition() {\n return [expect(parsers.condition, 'expected condition')];\n }\n },\n\n arguments: function (prevArgs) {\n let argsComma = prevArgs || [];\n const argsSemiColon = [];\n let isSemiColonSeparated;\n let value;\n\n parserInput.save();\n\n while (true) {\n if (prevArgs) {\n prevArgs = false;\n } else {\n value = parsers.detachedRuleset() || this.assignment() || parsers.expression();\n if (!value) {\n break;\n }\n\n if (value.value && value.value.length == 1) {\n value = value.value[0];\n }\n\n argsComma.push(value);\n }\n\n if (parserInput.$char(',')) {\n continue;\n }\n\n if (parserInput.$char(';') || isSemiColonSeparated) {\n isSemiColonSeparated = true;\n value = (argsComma.length < 1) ? argsComma[0]\n : new tree.Value(argsComma);\n argsSemiColon.push(value);\n argsComma = [];\n }\n }\n\n parserInput.forget();\n return isSemiColonSeparated ? argsSemiColon : argsComma;\n },\n literal: function () {\n return this.dimension() ||\n this.color() ||\n this.quoted() ||\n this.unicodeDescriptor();\n },\n\n // Assignments are argument entities for calls.\n // They are present in ie filter properties as shown below.\n //\n // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )\n //\n\n assignment: function () {\n let key;\n let value;\n parserInput.save();\n key = parserInput.$re(/^\\w+(?=\\s?=)/i);\n if (!key) {\n parserInput.restore();\n return;\n }\n if (!parserInput.$char('=')) {\n parserInput.restore();\n return;\n }\n value = parsers.entity();\n if (value) {\n parserInput.forget();\n return new(tree.Assignment)(key, value);\n } else {\n parserInput.restore();\n }\n },\n\n //\n // Parse url() tokens\n //\n // We use a specific rule for urls, because they don't really behave like\n // standard function calls. The difference is that the argument doesn't have\n // to be enclosed within a string, so it can't be parsed as an Expression.\n //\n url: function () {\n let value;\n const index = parserInput.i;\n\n parserInput.autoCommentAbsorb = false;\n\n if (!parserInput.$str('url(')) {\n parserInput.autoCommentAbsorb = true;\n return;\n }\n\n value = this.quoted() || this.variable() || this.property() ||\n parserInput.$re(/^(?:(?:\\\\[\\(\\)'\"])|[^\\(\\)'\"])+/) || '';\n\n parserInput.autoCommentAbsorb = true;\n\n expectChar(')');\n\n return new(tree.URL)((value.value != null || \n value instanceof tree.Variable || \n value instanceof tree.Property) ?\n value : new(tree.Anonymous)(value, index), index, fileInfo);\n },\n\n //\n // A Variable entity, such as `@fink`, in\n //\n // width: @fink + 2px\n //\n // We use a different parser for variable definitions,\n // see `parsers.variable`.\n //\n variable: function () {\n let ch;\n let name;\n const index = parserInput.i;\n\n parserInput.save();\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\\w-]+/))) {\n ch = parserInput.currentChar();\n if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\\s/)) {\n // this may be a VariableCall lookup\n const result = parsers.variableCall(name);\n if (result) {\n parserInput.forget();\n return result;\n }\n }\n parserInput.forget();\n return new(tree.Variable)(name, index, fileInfo);\n }\n parserInput.restore();\n },\n\n // A variable entity using the protective {} e.g. @{var}\n variableCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\\{([\\w-]+)\\}/))) {\n return new(tree.Variable)(`@${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Property accessor, such as `$color`, in\n //\n // background-color: $color\n //\n property: function () {\n let name;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\\$[\\w-]+/))) {\n return new(tree.Property)(name, index, fileInfo);\n }\n },\n\n // A property entity useing the protective {} e.g. ${prop}\n propertyCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\\$\\{([\\w-]+)\\}/))) {\n return new(tree.Property)(`$${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Hexadecimal color\n //\n // #4F3C2F\n //\n // `rgb` and `hsl` colors are parsed through the `entities.call` parser.\n //\n color: function () {\n let rgb;\n parserInput.save();\n\n if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\\w.#\\[])?/))) {\n if (!rgb[2]) {\n parserInput.forget();\n return new(tree.Color)(rgb[1], undefined, rgb[0]);\n } \n }\n parserInput.restore();\n },\n\n colorKeyword: function () {\n parserInput.save();\n const autoCommentAbsorb = parserInput.autoCommentAbsorb;\n parserInput.autoCommentAbsorb = false;\n const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/);\n parserInput.autoCommentAbsorb = autoCommentAbsorb;\n if (!k) {\n parserInput.forget();\n return;\n }\n parserInput.restore();\n const color = tree.Color.fromKeyword(k);\n if (color) {\n parserInput.$str(k);\n return color;\n }\n },\n\n //\n // A Dimension, that is, a number and a unit\n //\n // 0.5em 95%\n //\n dimension: function () {\n if (parserInput.peekNotNumeric()) {\n return;\n }\n\n const value = parserInput.$re(/^([+-]?\\d*\\.?\\d+)(%|[a-z_]+)?/i);\n if (value) {\n return new(tree.Dimension)(value[1], value[2]);\n }\n },\n\n //\n // A unicode descriptor, as is used in unicode-range\n //\n // U+0?? or U+00A1-00A9\n //\n unicodeDescriptor: function () {\n let ud;\n\n ud = parserInput.$re(/^U\\+[0-9a-fA-F?]+(\\-[0-9a-fA-F?]+)?/);\n if (ud) {\n return new(tree.UnicodeDescriptor)(ud[0]);\n }\n },\n\n //\n // JavaScript code to be evaluated\n //\n // `window.location.href`\n //\n javascript: function () {\n let js;\n const index = parserInput.i;\n\n parserInput.save();\n\n const escape = parserInput.$char('~');\n const jsQuote = parserInput.$char('`');\n\n if (!jsQuote) {\n parserInput.restore();\n return;\n }\n\n js = parserInput.$re(/^[^`]*`/);\n if (js) {\n parserInput.forget();\n return new(tree.JavaScript)(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo);\n }\n parserInput.restore('invalid javascript definition');\n }\n },\n\n //\n // The variable part of a variable definition. Used in the `rule` parser\n //\n // @fink:\n //\n variable: function () {\n let name;\n\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\\w-]+)\\s*:/))) { return name[1]; }\n },\n\n //\n // Call a variable value to retrieve a detached ruleset\n // or a value from a detached ruleset's rules.\n //\n // @fink();\n // @fink;\n // color: @fink[@color];\n //\n variableCall: function (parsedName) {\n let lookups;\n let important;\n const i = parserInput.i;\n const inValue = !!parsedName;\n let name = parsedName;\n\n parserInput.save();\n\n if (name || (parserInput.currentChar() === '@'\n && (name = parserInput.$re(/^(@[\\w-]+)(\\(\\s*\\))?/)))) {\n\n lookups = this.mixin.ruleLookups();\n\n if (!lookups && ((inValue && parserInput.$str('()') !== '()') || (name[2] !== '()'))) {\n parserInput.restore('Missing \\'[...]\\' lookup in variable call');\n return;\n }\n\n if (!inValue) {\n name = name[1];\n }\n\n if (lookups && parsers.important()) {\n important = true;\n }\n\n const call = new tree.VariableCall(name, i, fileInfo);\n if (!inValue && parsers.end()) {\n parserInput.forget();\n return call;\n }\n else {\n parserInput.forget();\n return new tree.NamespaceValue(call, lookups, important, i, fileInfo);\n }\n }\n\n parserInput.restore();\n },\n\n //\n // extend syntax - used to extend selectors\n //\n extend: function(isRule) {\n let elements;\n let e;\n const index = parserInput.i;\n let option;\n let extendList;\n let extend;\n\n if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) {\n return;\n }\n\n do {\n option = null;\n elements = null;\n while (!(option = parserInput.$re(/^(all)(?=\\s*(\\)|,))/))) {\n e = this.element();\n if (!e) {\n break;\n }\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n }\n\n option = option && option[1];\n if (!elements) {\n error('Missing target selector for :extend().');\n }\n extend = new(tree.Extend)(new(tree.Selector)(elements), option, index, fileInfo);\n if (extendList) {\n extendList.push(extend);\n } else {\n extendList = [ extend ];\n }\n } while (parserInput.$char(','));\n\n expect(/^\\)/);\n\n if (isRule) {\n expect(/^;/);\n }\n\n return extendList;\n },\n\n //\n // extendRule - used in a rule to extend all the parent selectors\n //\n extendRule: function() {\n return this.extend(true);\n },\n\n //\n // Mixins\n //\n mixin: {\n //\n // A Mixin call, with an optional argument list\n //\n // #mixins > .square(#fff);\n // #mixins.square(#fff);\n // .rounded(4px, black);\n // .button;\n //\n // We can lookup / return a value using the lookup syntax:\n //\n // color: #mixin.square(#fff)[@color];\n //\n // The `while` loop is there because mixins can be\n // namespaced, but we only support the child and descendant\n // selector for now.\n //\n call: function (inValue, getLookup) {\n const s = parserInput.currentChar();\n let important = false;\n let lookups;\n const index = parserInput.i;\n let elements;\n let args;\n let hasParens;\n\n if (s !== '.' && s !== '#') { return; }\n\n parserInput.save(); // stop us absorbing part of an invalid selector\n\n elements = this.elements();\n\n if (elements) {\n if (parserInput.$char('(')) {\n args = this.args(true).args;\n expectChar(')');\n hasParens = true;\n }\n\n if (getLookup !== false) {\n lookups = this.ruleLookups();\n }\n if (getLookup === true && !lookups) {\n parserInput.restore();\n return;\n }\n\n if (inValue && !lookups && !hasParens) {\n // This isn't a valid in-value mixin call\n parserInput.restore();\n return;\n }\n\n if (!inValue && parsers.important()) {\n important = true;\n }\n\n if (inValue || parsers.end()) {\n parserInput.forget();\n const mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important);\n if (lookups) {\n return new tree.NamespaceValue(mixin, lookups, important);\n }\n else {\n return mixin;\n }\n }\n }\n\n parserInput.restore();\n },\n /**\n * Matching elements for mixins\n * (Start with . or # and can have > )\n */\n elements: function() {\n let elements;\n let e;\n let c;\n let elem;\n let elemIndex;\n const re = /^[#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/;\n while (true) {\n elemIndex = parserInput.i;\n e = parserInput.$re(re);\n \n if (!e) {\n break;\n }\n elem = new(tree.Element)(c, e, false, elemIndex, fileInfo);\n if (elements) {\n elements.push(elem);\n } else {\n elements = [ elem ];\n }\n c = parserInput.$char('>');\n }\n return elements;\n },\n args: function (isCall) {\n const entities = parsers.entities;\n const returner = { args:null, variadic: false };\n let expressions = [];\n const argsSemiColon = [];\n const argsComma = [];\n let isSemiColonSeparated;\n let expressionContainsNamed;\n let name;\n let nameLoop;\n let value;\n let arg;\n let expand;\n let hasSep = true;\n\n parserInput.save();\n\n while (true) {\n if (isCall) {\n arg = parsers.detachedRuleset() || parsers.expression();\n } else {\n parserInput.commentStore.length = 0;\n if (parserInput.$str('...')) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ variadic: true });\n break;\n }\n arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true);\n }\n\n if (!arg || !hasSep) {\n break;\n }\n\n nameLoop = null;\n if (arg.throwAwayComments) {\n arg.throwAwayComments();\n }\n value = arg;\n let val = null;\n\n if (isCall) {\n // Variable\n if (arg.value && arg.value.length == 1) {\n val = arg.value[0];\n }\n } else {\n val = arg;\n }\n\n if (val && (val instanceof tree.Variable || val instanceof tree.Property)) {\n if (parserInput.$char(':')) {\n if (expressions.length > 0) {\n if (isSemiColonSeparated) {\n error('Cannot mix ; and , as delimiter types');\n }\n expressionContainsNamed = true;\n }\n\n value = parsers.detachedRuleset() || parsers.expression();\n\n if (!value) {\n if (isCall) {\n error('could not understand value for named argument');\n } else {\n parserInput.restore();\n returner.args = [];\n return returner;\n }\n }\n nameLoop = (name = val.name);\n } else if (parserInput.$str('...')) {\n if (!isCall) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ name: arg.name, variadic: true });\n break;\n } else {\n expand = true;\n }\n } else if (!isCall) {\n name = nameLoop = val.name;\n value = null;\n }\n }\n\n if (value) {\n expressions.push(value);\n }\n\n argsComma.push({ name:nameLoop, value, expand });\n\n if (parserInput.$char(',')) {\n hasSep = true;\n continue;\n }\n hasSep = parserInput.$char(';') === ';';\n\n if (hasSep || isSemiColonSeparated) {\n\n if (expressionContainsNamed) {\n error('Cannot mix ; and , as delimiter types');\n }\n\n isSemiColonSeparated = true;\n\n if (expressions.length > 1) {\n value = new(tree.Value)(expressions);\n }\n argsSemiColon.push({ name, value, expand });\n\n name = null;\n expressions = [];\n expressionContainsNamed = false;\n }\n }\n\n parserInput.forget();\n returner.args = isSemiColonSeparated ? argsSemiColon : argsComma;\n return returner;\n },\n //\n // A Mixin definition, with a list of parameters\n //\n // .rounded (@radius: 2px, @color) {\n // ...\n // }\n //\n // Until we have a finer grained state-machine, we have to\n // do a look-ahead, to make sure we don't have a mixin call.\n // See the `rule` function for more information.\n //\n // We start by matching `.rounded (`, and then proceed on to\n // the argument list, which has optional default values.\n // We store the parameters in `params`, with a `value` key,\n // if there is a value, such as in the case of `@radius`.\n //\n // Once we've got our params list, and a closing `)`, we parse\n // the `{...}` block.\n //\n definition: function () {\n let name;\n let params = [];\n let match;\n let ruleset;\n let cond;\n let variadic = false;\n if ((parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#') ||\n parserInput.peek(/^[^{]*\\}/)) {\n return;\n }\n\n parserInput.save();\n\n match = parserInput.$re(/^([#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\\s*\\(/);\n if (match) {\n name = match[1];\n\n const argInfo = this.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n\n // .mixincall(\"@{a}\");\n // looks a bit like a mixin definition..\n // also\n // .mixincall(@a: {rule: set;});\n // so we have to be nice and restore\n if (!parserInput.$char(')')) {\n parserInput.restore('Missing closing \\')\\'');\n return;\n }\n\n parserInput.commentStore.length = 0;\n\n if (parserInput.$str('when')) { // Guard\n cond = expect(parsers.conditions, 'expected condition');\n }\n\n ruleset = parsers.block();\n\n if (ruleset) {\n parserInput.forget();\n return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);\n } else {\n parserInput.restore();\n }\n } else {\n parserInput.forget();\n }\n },\n \n ruleLookups: function() {\n let rule;\n let args;\n const lookups = [];\n\n if (parserInput.currentChar() !== '[') { \n return;\n }\n\n while (true) {\n parserInput.save();\n args = null;\n rule = this.lookupValue();\n if (!rule && rule !== '') {\n parserInput.restore();\n break;\n }\n lookups.push(rule);\n parserInput.forget();\n }\n if (lookups.length > 0) {\n return lookups;\n }\n },\n \n lookupValue: function() {\n parserInput.save();\n \n if (!parserInput.$char('[')) { \n parserInput.restore();\n return;\n }\n \n const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/);\n \n if (!parserInput.$char(']')) {\n parserInput.restore();\n return;\n } \n\n if (name || name === '') {\n parserInput.forget();\n return name;\n }\n \n parserInput.restore();\n }\n },\n //\n // Entities are the smallest recognized token,\n // and can be found inside a rule's value.\n //\n entity: function () {\n const entities = this.entities;\n\n return this.comment() || entities.literal() || entities.variable() || entities.url() ||\n entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) ||\n entities.javascript();\n },\n\n //\n // A Declaration terminator. Note that we use `peek()` to check for '}',\n // because the `block` rule will be expecting it, but we still need to make sure\n // it's there, if ';' was omitted.\n //\n end: function () {\n return parserInput.$char(';') || parserInput.peek('}');\n },\n\n //\n // IE's alpha function\n //\n // alpha(opacity=88)\n //\n ieAlpha: function () {\n let value;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (!parserInput.$re(/^opacity=/i)) { return; }\n value = parserInput.$re(/^\\d+/);\n if (!value) {\n value = expect(parsers.entities.variable, 'Could not parse alpha');\n value = `@{${value.name.slice(1)}}`;\n }\n expectChar(')');\n return new tree.Quoted('', `alpha(opacity=${value})`);\n },\n\n //\n // A Selector Element\n //\n // div\n // + h1\n // #socks\n // input[type=\"text\"]\n //\n // Elements are the building blocks for Selectors,\n // they are made out of a `Combinator` (see combinator rule),\n // and an element name, such as a tag a class, or `*`.\n //\n element: function () {\n let e;\n let c;\n let v;\n const index = parserInput.i;\n\n c = this.combinator();\n\n e = parserInput.$re(/^(?:\\d+\\.\\d+|\\d+)%/) ||\n parserInput.$re(/^(?:[.#]?|:*)(?:[\\w-]|[^\\x00-\\x9f]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||\n parserInput.$char('*') || parserInput.$char('&') || this.attribute() ||\n parserInput.$re(/^\\([^&()@]+\\)/) || parserInput.$re(/^[\\.#:](?=@)/) ||\n this.entities.variableCurly();\n\n if (!e) {\n parserInput.save();\n if (parserInput.$char('(')) {\n if ((v = this.selector(false)) && parserInput.$char(')')) {\n e = new(tree.Paren)(v);\n parserInput.forget();\n } else {\n parserInput.restore('Missing closing \\')\\'');\n }\n } else {\n parserInput.forget();\n }\n }\n\n if (e) { return new(tree.Element)(c, e, e instanceof tree.Variable, index, fileInfo); }\n },\n\n //\n // Combinators combine elements together, in a Selector.\n //\n // Because our parser isn't white-space sensitive, special care\n // has to be taken, when parsing the descendant combinator, ` `,\n // as it's an empty space. We have to check the previous character\n // in the input, to see if it's a ` ` character. More info on how\n // we deal with this in *combinator.js*.\n //\n combinator: function () {\n let c = parserInput.currentChar();\n\n if (c === '/') {\n parserInput.save();\n const slashedCombinator = parserInput.$re(/^\\/[a-z]+\\//i);\n if (slashedCombinator) {\n parserInput.forget();\n return new(tree.Combinator)(slashedCombinator);\n }\n parserInput.restore();\n }\n\n if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') {\n parserInput.i++;\n if (c === '^' && parserInput.currentChar() === '^') {\n c = '^^';\n parserInput.i++;\n }\n while (parserInput.isWhitespace()) { parserInput.i++; }\n return new(tree.Combinator)(c);\n } else if (parserInput.isWhitespace(-1)) {\n return new(tree.Combinator)(' ');\n } else {\n return new(tree.Combinator)(null);\n }\n },\n //\n // A CSS Selector\n // with less extensions e.g. the ability to extend and guard\n //\n // .class > div + h1\n // li a:hover\n //\n // Selectors are made out of one or more Elements, see above.\n //\n selector: function (isLess) {\n const index = parserInput.i;\n let elements;\n let extendList;\n let c;\n let e;\n let allExtends;\n let when;\n let condition;\n isLess = isLess !== false;\n while ((isLess && (extendList = this.extend())) || (isLess && (when = parserInput.$str('when'))) || (e = this.element())) {\n if (when) {\n condition = expect(this.conditions, 'expected condition');\n } else if (condition) {\n error('CSS guard can only be used at the end of selector');\n } else if (extendList) {\n if (allExtends) {\n allExtends = allExtends.concat(extendList);\n } else {\n allExtends = extendList;\n }\n } else {\n if (allExtends) { error('Extend can only be used at the end of selector'); }\n c = parserInput.currentChar();\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n e = null;\n }\n if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') {\n break;\n }\n }\n\n if (elements) { return new(tree.Selector)(elements, allExtends, condition, index, fileInfo); }\n if (allExtends) { error('Extend must be used to extend a selector, it cannot be used on its own'); }\n },\n selectors: function () {\n let s;\n let selectors;\n while (true) {\n s = this.selector();\n if (!s) {\n break;\n }\n if (selectors) {\n selectors.push(s);\n } else {\n selectors = [ s ];\n }\n parserInput.commentStore.length = 0;\n if (s.condition && selectors.length > 1) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n if (!parserInput.$char(',')) { break; }\n if (s.condition) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n parserInput.commentStore.length = 0;\n }\n return selectors;\n },\n attribute: function () {\n if (!parserInput.$char('[')) { return; }\n\n const entities = this.entities;\n let key;\n let val;\n let op;\n\n if (!(key = entities.variableCurly())) {\n key = expect(/^(?:[_A-Za-z0-9-\\*]*\\|)?(?:[_A-Za-z0-9-]|\\\\.)+/);\n }\n\n op = parserInput.$re(/^[|~*$^]?=/);\n if (op) {\n val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\\w-]+/) || entities.variableCurly();\n }\n\n expectChar(']');\n\n return new(tree.Attribute)(key, op, val);\n },\n\n //\n // The `block` rule is used by `ruleset` and `mixin.definition`.\n // It's a wrapper around the `primary` rule, with added `{}`.\n //\n block: function () {\n let content;\n if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) {\n return content;\n }\n },\n\n blockRuleset: function() {\n let block = this.block();\n\n if (block) {\n block = new tree.Ruleset(null, block);\n }\n return block;\n },\n\n detachedRuleset: function() {\n let argInfo;\n let params;\n let variadic;\n\n parserInput.save();\n if (parserInput.$re(/^[.#]\\(/)) {\n /**\n * DR args currently only implemented for each() function, and not \n * yet settable as `@dr: #(@arg) {}`\n * This should be done when DRs are merged with mixins.\n * See: https://github.com/less/less-meta/issues/16\n */\n argInfo = this.mixin.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return;\n }\n }\n const blockRuleset = this.blockRuleset();\n if (blockRuleset) {\n parserInput.forget();\n if (params) {\n return new tree.mixin.Definition(null, params, blockRuleset, null, variadic);\n }\n return new tree.DetachedRuleset(blockRuleset);\n }\n parserInput.restore();\n },\n\n //\n // div, .class, body > p {...}\n //\n ruleset: function () {\n let selectors;\n let rules;\n let debugInfo;\n\n parserInput.save();\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(parserInput.i);\n }\n\n selectors = this.selectors();\n\n if (selectors && (rules = this.block())) {\n parserInput.forget();\n const ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports);\n if (context.dumpLineNumbers) {\n ruleset.debugInfo = debugInfo;\n }\n return ruleset;\n } else {\n parserInput.restore();\n }\n },\n declaration: function () {\n let name;\n let value;\n const index = parserInput.i;\n let hasDR;\n const c = parserInput.currentChar();\n let important;\n let merge;\n let isVariable;\n\n if (c === '.' || c === '#' || c === '&' || c === ':') { return; }\n\n parserInput.save();\n\n name = this.variable() || this.ruleProperty();\n if (name) {\n isVariable = typeof name === 'string';\n\n if (isVariable) {\n value = this.detachedRuleset();\n if (value) {\n hasDR = true;\n }\n }\n\n parserInput.commentStore.length = 0;\n if (!value) {\n // a name returned by this.ruleProperty() is always an array of the form:\n // [string-1, ..., string-n, \"\"] or [string-1, ..., string-n, \"+\"]\n // where each item is a tree.Keyword or tree.Variable\n merge = !isVariable && name.length > 1 && name.pop().value;\n\n // Custom property values get permissive parsing\n if (name[0].value && name[0].value.slice(0, 2) === '--') {\n value = this.permissiveValue();\n }\n // Try to store values as anonymous\n // If we need the value later we'll re-parse it in ruleset.parseValue\n else {\n value = this.anonymousValue();\n }\n if (value) {\n parserInput.forget();\n // anonymous values absorb the end ';' which is required for them to work\n return new (tree.Declaration)(name, value, false, merge, index, fileInfo);\n }\n\n if (!value) {\n value = this.value();\n }\n\n if (value) {\n important = this.important();\n } else if (isVariable) {\n // As a last resort, try permissiveValue\n value = this.permissiveValue();\n }\n }\n\n if (value && (this.end() || hasDR)) {\n parserInput.forget();\n return new (tree.Declaration)(name, value, important, merge, index, fileInfo);\n }\n else {\n parserInput.restore();\n }\n } else {\n parserInput.restore();\n }\n },\n anonymousValue: function () {\n const index = parserInput.i;\n const match = parserInput.$re(/^([^.#@\\$+\\/'\"*`(;{}-]*);/);\n if (match) {\n return new(tree.Anonymous)(match[1], index);\n }\n },\n /**\n * Used for custom properties, at-rules, and variables (as fallback)\n * Parses almost anything inside of {} [] () \"\" blocks\n * until it reaches outer-most tokens.\n * \n * First, it will try to parse comments and entities to reach\n * the end. This is mostly like the Expression parser except no\n * math is allowed.\n */\n permissiveValue: function (untilTokens) {\n let i;\n let e;\n let done;\n let value;\n const tok = untilTokens || ';';\n const index = parserInput.i;\n const result = [];\n\n function testCurrentChar() {\n const char = parserInput.currentChar();\n if (typeof tok === 'string') {\n return char === tok;\n } else {\n return tok.test(char);\n }\n }\n if (testCurrentChar()) {\n return;\n }\n value = [];\n do {\n e = this.comment();\n if (e) {\n value.push(e);\n continue;\n }\n e = this.entity();\n if (e) {\n value.push(e);\n }\n } while (e);\n\n done = testCurrentChar();\n\n if (value.length > 0) {\n value = new(tree.Expression)(value);\n if (done) {\n return value;\n }\n else {\n result.push(value);\n }\n // Preserve space before $parseUntil as it will not\n if (parserInput.prevChar() === ' ') {\n result.push(new tree.Anonymous(' ', index));\n }\n }\n parserInput.save();\n\n value = parserInput.$parseUntil(tok);\n\n if (value) {\n if (typeof value === 'string') {\n error(`Expected '${value}'`, 'Parse');\n }\n if (value.length === 1 && value[0] === ' ') {\n parserInput.forget();\n return new tree.Anonymous('', index);\n }\n let item;\n for (i = 0; i < value.length; i++) {\n item = value[i];\n if (Array.isArray(item)) {\n // Treat actual quotes as normal quoted values\n result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo));\n }\n else {\n if (i === value.length - 1) {\n item = item.trim();\n }\n // Treat like quoted values, but replace vars like unquoted expressions\n const quote = new tree.Quoted('\\'', item, true, index, fileInfo);\n quote.variableRegex = /@([\\w-]+)/g;\n quote.propRegex = /\\$([\\w-]+)/g;\n result.push(quote);\n }\n }\n parserInput.forget();\n return new tree.Expression(result, true);\n }\n parserInput.restore();\n },\n\n //\n // An @import atrule\n //\n // @import \"lib\";\n //\n // Depending on our environment, importing is done differently:\n // In the browser, it's an XHR request, in Node, it would be a\n // file-system operation. The function used for importing is\n // stored in `import`, which we pass to the Import constructor.\n //\n 'import': function () {\n let path;\n let features;\n const index = parserInput.i;\n\n const dir = parserInput.$re(/^@import?\\s+/);\n\n if (dir) {\n const options = (dir ? this.importOptions() : null) || {};\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n features = this.mediaFeatures();\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon or unrecognised media features on import');\n }\n features = features && new(tree.Value)(features);\n return new(tree.Import)(path, features, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed import statement');\n }\n }\n },\n\n importOptions: function() {\n let o;\n const options = {};\n let optionName;\n let value;\n\n // list of options, surrounded by parens\n if (!parserInput.$char('(')) { return null; }\n do {\n o = this.importOption();\n if (o) {\n optionName = o;\n value = true;\n switch (optionName) {\n case 'css':\n optionName = 'less';\n value = false;\n break;\n case 'once':\n optionName = 'multiple';\n value = false;\n break;\n }\n options[optionName] = value;\n if (!parserInput.$char(',')) { break; }\n }\n } while (o);\n expectChar(')');\n return options;\n },\n\n importOption: function() {\n const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/);\n if (opt) {\n return opt[1];\n }\n },\n\n mediaFeature: function () {\n const entities = this.entities;\n const nodes = [];\n let e;\n let p;\n parserInput.save();\n do {\n e = entities.keyword() || entities.variable() || entities.mixinLookup();\n if (e) {\n nodes.push(e);\n } else if (parserInput.$char('(')) {\n p = this.property();\n e = this.value();\n if (parserInput.$char(')')) {\n if (p && e) {\n nodes.push(new(tree.Paren)(new(tree.Declaration)(p, e, null, null, parserInput.i, fileInfo, true)));\n } else if (e) {\n nodes.push(new(tree.Paren)(e));\n } else {\n error('badly formed media feature definition');\n }\n } else {\n error('Missing closing \\')\\'', 'Parse');\n }\n }\n } while (e);\n\n parserInput.forget();\n if (nodes.length > 0) {\n return new(tree.Expression)(nodes);\n }\n },\n\n mediaFeatures: function () {\n const entities = this.entities;\n const features = [];\n let e;\n do {\n e = this.mediaFeature();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n } else {\n e = entities.variable() || entities.mixinLookup();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n }\n } while (e);\n\n return features.length > 0 ? features : null;\n },\n\n media: function () {\n let features;\n let rules;\n let media;\n let debugInfo;\n const index = parserInput.i;\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(index);\n }\n\n parserInput.save();\n\n if (parserInput.$str('@media')) {\n features = this.mediaFeatures();\n\n rules = this.block();\n\n if (!rules) {\n error('media definitions require block statements after any features');\n }\n\n parserInput.forget();\n\n media = new(tree.Media)(rules, features, index, fileInfo);\n if (context.dumpLineNumbers) {\n media.debugInfo = debugInfo;\n }\n\n return media;\n }\n\n parserInput.restore();\n },\n\n //\n\n // A @plugin directive, used to import plugins dynamically.\n //\n // @plugin (args) \"lib\";\n //\n plugin: function () {\n let path;\n let args;\n let options;\n const index = parserInput.i;\n const dir = parserInput.$re(/^@plugin?\\s+/);\n\n if (dir) {\n args = this.pluginArgs();\n\n if (args) {\n options = {\n pluginArgs: args,\n isPlugin: true\n };\n }\n else {\n options = { isPlugin: true };\n }\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon on @plugin');\n }\n return new(tree.Import)(path, null, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed @plugin statement');\n }\n }\n },\n\n pluginArgs: function() {\n // list of options, surrounded by parens\n parserInput.save();\n if (!parserInput.$char('(')) {\n parserInput.restore();\n return null;\n }\n const args = parserInput.$re(/^\\s*([^\\);]+)\\)\\s*/);\n if (args[1]) {\n parserInput.forget();\n return args[1].trim();\n }\n else { \n parserInput.restore();\n return null;\n }\n },\n\n //\n // A CSS AtRule\n //\n // @charset \"utf-8\";\n //\n atrule: function () {\n const index = parserInput.i;\n let name;\n let value;\n let rules;\n let nonVendorSpecificName;\n let hasIdentifier;\n let hasExpression;\n let hasUnknown;\n let hasBlock = true;\n let isRooted = true;\n\n if (parserInput.currentChar() !== '@') { return; }\n\n value = this['import']() || this.plugin() || this.media();\n if (value) {\n return value;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^@[a-z-]+/);\n\n if (!name) { return; }\n\n nonVendorSpecificName = name;\n if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {\n nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`;\n }\n\n switch (nonVendorSpecificName) {\n case '@charset':\n hasIdentifier = true;\n hasBlock = false;\n break;\n case '@namespace':\n hasExpression = true;\n hasBlock = false;\n break;\n case '@keyframes':\n case '@counter-style':\n hasIdentifier = true;\n break;\n case '@document':\n case '@supports':\n hasUnknown = true;\n isRooted = false;\n break;\n default:\n hasUnknown = true;\n break;\n }\n\n parserInput.commentStore.length = 0;\n\n if (hasIdentifier) {\n value = this.entity();\n if (!value) {\n error(`expected ${name} identifier`);\n }\n } else if (hasExpression) {\n value = this.expression();\n if (!value) {\n error(`expected ${name} expression`);\n }\n } else if (hasUnknown) {\n value = this.permissiveValue(/^[{;]/);\n hasBlock = (parserInput.currentChar() === '{');\n if (!value) {\n if (!hasBlock && parserInput.currentChar() !== ';') {\n error(`${name} rule is missing block or ending semi-colon`);\n }\n }\n else if (!value.value) {\n value = null;\n }\n }\n\n if (hasBlock) {\n rules = this.blockRuleset();\n }\n\n if (rules || (!hasBlock && value && parserInput.$char(';'))) {\n parserInput.forget();\n return new (tree.AtRule)(name, value, rules, index, fileInfo,\n context.dumpLineNumbers ? getDebugInfo(index) : null,\n isRooted\n );\n }\n\n parserInput.restore('at-rule options not recognised');\n },\n\n //\n // A Value is a comma-delimited list of Expressions\n //\n // font-family: Baskerville, Georgia, serif;\n //\n // In a Rule, a Value represents everything after the `:`,\n // and before the `;`.\n //\n value: function () {\n let e;\n const expressions = [];\n const index = parserInput.i;\n\n do {\n e = this.expression();\n if (e) {\n expressions.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n } while (e);\n\n if (expressions.length > 0) {\n return new(tree.Value)(expressions, index);\n }\n },\n important: function () {\n if (parserInput.currentChar() === '!') {\n return parserInput.$re(/^! *important/);\n }\n },\n sub: function () {\n let a;\n let e;\n\n parserInput.save();\n if (parserInput.$char('(')) {\n a = this.addition();\n if (a && parserInput.$char(')')) {\n parserInput.forget();\n e = new(tree.Expression)([a]);\n e.parens = true;\n return e;\n }\n parserInput.restore('Expected \\')\\'');\n return;\n }\n parserInput.restore();\n },\n multiplication: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.operand();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n if (parserInput.peek(/^\\/[*\\/]/)) {\n break;\n }\n\n parserInput.save();\n\n op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./');\n\n if (!op) { parserInput.forget(); break; }\n\n a = this.operand();\n\n if (!a) { parserInput.restore(); break; }\n parserInput.forget();\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n addition: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.multiplication();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n op = parserInput.$re(/^[-+]\\s+/) || (!isSpaced && (parserInput.$char('+') || parserInput.$char('-')));\n if (!op) {\n break;\n }\n a = this.multiplication();\n if (!a) {\n break;\n }\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n conditions: function () {\n let a;\n let b;\n const index = parserInput.i;\n let condition;\n\n a = this.condition(true);\n if (a) {\n while (true) {\n if (!parserInput.peek(/^,\\s*(not\\s*)?\\(/) || !parserInput.$char(',')) {\n break;\n }\n b = this.condition(true);\n if (!b) {\n break;\n }\n condition = new(tree.Condition)('or', condition || a, b, index);\n }\n return condition || a;\n }\n },\n condition: function (needsParens) {\n let result;\n let logical;\n let next;\n function or() {\n return parserInput.$str('or');\n }\n\n result = this.conditionAnd(needsParens);\n if (!result) {\n return ;\n }\n logical = or();\n if (logical) {\n next = this.condition(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n conditionAnd: function (needsParens) {\n let result;\n let logical;\n let next;\n const self = this;\n function insideCondition() {\n const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens);\n if (!cond && !needsParens) {\n return self.atomicCondition(needsParens);\n }\n return cond;\n }\n function and() {\n return parserInput.$str('and');\n }\n\n result = insideCondition();\n if (!result) {\n return ;\n }\n logical = and();\n if (logical) {\n next = this.conditionAnd(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n negatedCondition: function (needsParens) {\n if (parserInput.$str('not')) {\n const result = this.parenthesisCondition(needsParens);\n if (result) {\n result.negate = !result.negate;\n }\n return result;\n }\n },\n parenthesisCondition: function (needsParens) {\n function tryConditionFollowedByParenthesis(me) {\n let body;\n parserInput.save();\n body = me.condition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return ;\n }\n parserInput.forget();\n return body;\n }\n\n let body;\n parserInput.save();\n if (!parserInput.$str('(')) {\n parserInput.restore();\n return ;\n }\n body = tryConditionFollowedByParenthesis(this);\n if (body) {\n parserInput.forget();\n return body;\n }\n\n body = this.atomicCondition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`);\n return ;\n }\n parserInput.forget();\n return body;\n },\n atomicCondition: function (needsParens) {\n const entities = this.entities;\n const index = parserInput.i;\n let a;\n let b;\n let c;\n let op;\n\n function cond() {\n return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup();\n }\n cond = cond.bind(this);\n\n a = cond();\n if (a) {\n if (parserInput.$char('>')) {\n if (parserInput.$char('=')) {\n op = '>=';\n } else {\n op = '>';\n }\n } else\n if (parserInput.$char('<')) {\n if (parserInput.$char('=')) {\n op = '<=';\n } else {\n op = '<';\n }\n } else\n if (parserInput.$char('=')) {\n if (parserInput.$char('>')) {\n op = '=>';\n } else if (parserInput.$char('<')) {\n op = '=<';\n } else {\n op = '=';\n }\n }\n if (op) {\n b = cond();\n if (b) {\n c = new(tree.Condition)(op, a, b, index, false);\n } else {\n error('expected expression');\n }\n } else {\n c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, false);\n }\n return c;\n }\n },\n\n //\n // An operand is anything that can be part of an operation,\n // such as a Color, or a Variable\n //\n operand: function () {\n const entities = this.entities;\n let negate;\n\n if (parserInput.peek(/^-[@\\$\\(]/)) {\n negate = parserInput.$char('-');\n }\n\n let o = this.sub() || entities.dimension() ||\n entities.color() || entities.variable() ||\n entities.property() || entities.call() ||\n entities.quoted(true) || entities.colorKeyword() ||\n entities.mixinLookup();\n\n if (negate) {\n o.parensInOp = true;\n o = new(tree.Negative)(o);\n }\n\n return o;\n },\n\n //\n // Expressions either represent mathematical operations,\n // or white-space delimited Entities.\n //\n // 1px solid black\n // @var * 2\n //\n expression: function () {\n const entities = [];\n let e;\n let delim;\n const index = parserInput.i;\n\n do {\n e = this.comment();\n if (e) {\n entities.push(e);\n continue;\n }\n e = this.addition() || this.entity();\n if (e) {\n entities.push(e);\n // operations do not allow keyword \"/\" dimension (e.g. small/20px) so we support that here\n if (!parserInput.peek(/^\\/[\\/*]/)) {\n delim = parserInput.$char('/');\n if (delim) {\n entities.push(new(tree.Anonymous)(delim, index));\n }\n }\n }\n } while (e);\n if (entities.length > 0) {\n return new(tree.Expression)(entities);\n }\n },\n property: function () {\n const name = parserInput.$re(/^(\\*?-?[_a-zA-Z0-9-]+)\\s*:/);\n if (name) {\n return name[1];\n }\n },\n ruleProperty: function () {\n let name = [];\n const index = [];\n let s;\n let k;\n\n parserInput.save();\n\n const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\\s*:/);\n if (simpleProperty) {\n name = [new(tree.Keyword)(simpleProperty[1])];\n parserInput.forget();\n return name;\n }\n\n function match(re) {\n const i = parserInput.i;\n const chunk = parserInput.$re(re);\n if (chunk) {\n index.push(i);\n return name.push(chunk[1]);\n }\n }\n\n match(/^(\\*?)/);\n while (true) {\n if (!match(/^((?:[\\w-]+)|(?:[@\\$]\\{[\\w-]+\\}))/)) {\n break;\n }\n }\n\n if ((name.length > 1) && match(/^((?:\\+_|\\+)?)\\s*:/)) {\n parserInput.forget();\n\n // at last, we have the complete match now. move forward,\n // convert name particles to tree objects and return:\n if (name[0] === '') {\n name.shift();\n index.shift();\n }\n for (k = 0; k < name.length; k++) {\n s = name[k];\n name[k] = (s.charAt(0) !== '@' && s.charAt(0) !== '$') ?\n new(tree.Keyword)(s) :\n (s.charAt(0) === '@' ?\n new(tree.Variable)(`@${s.slice(2, -1)}`, index[k], fileInfo) :\n new(tree.Property)(`$${s.slice(2, -1)}`, index[k], fileInfo));\n }\n return name;\n }\n parserInput.restore();\n }\n }\n };\n};\nParser.serializeVars = vars => {\n let s = '';\n\n for (const name in vars) {\n if (Object.hasOwnProperty.call(vars, name)) {\n const value = vars[name];\n s += `${((name[0] === '@') ? '' : '@') + name}: ${value}${(String(value).slice(-1) === ';') ? '' : ';'}`;\n }\n }\n\n return s;\n};\n\nexport default Parser;\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nlet colorFunctions;\n\nfunction clamp(val) {\n return Math.min(1, Math.max(0, val));\n}\nfunction hsla(origColor, hsl) {\n const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a);\n if (color) {\n if (origColor.value && \n /^(rgb|hsl)/.test(origColor.value)) {\n color.value = origColor.value;\n } else {\n color.value = 'rgb';\n }\n return color;\n }\n}\nfunction toHSL(color) {\n if (color.toHSL) {\n return color.toHSL();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction toHSV(color) {\n if (color.toHSV) {\n return color.toHSV();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction number(n) {\n if (n instanceof Dimension) {\n return parseFloat(n.unit.is('%') ? n.value / 100 : n.value);\n } else if (typeof n === 'number') {\n return n;\n } else {\n throw {\n type: 'Argument',\n message: 'color functions take numbers as parameters'\n };\n }\n}\nfunction scaled(n, size) {\n if (n instanceof Dimension && n.unit.is('%')) {\n return parseFloat(n.value * size / 100);\n } else {\n return number(n);\n }\n}\ncolorFunctions = {\n rgb: function (r, g, b) {\n const color = colorFunctions.rgba(r, g, b, 1.0);\n if (color) {\n color.value = 'rgb';\n return color;\n }\n },\n rgba: function (r, g, b, a) {\n try {\n if (r instanceof Color) {\n if (g) {\n a = number(g);\n } else {\n a = r.alpha;\n }\n return new Color(r.rgb, a, 'rgba');\n }\n const rgb = [r, g, b].map(c => scaled(c, 255));\n a = number(a);\n return new Color(rgb, a, 'rgba');\n }\n catch (e) {}\n },\n hsl: function (h, s, l) {\n const color = colorFunctions.hsla(h, s, l, 1.0);\n if (color) {\n color.value = 'hsl';\n return color;\n }\n },\n hsla: function (h, s, l, a) {\n try {\n if (h instanceof Color) {\n if (s) {\n a = number(s);\n } else {\n a = h.alpha;\n }\n return new Color(h.rgb, a, 'hsla');\n }\n\n let m1;\n let m2;\n\n function hue(h) {\n h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);\n if (h * 6 < 1) {\n return m1 + (m2 - m1) * h * 6;\n }\n else if (h * 2 < 1) {\n return m2;\n }\n else if (h * 3 < 2) {\n return m1 + (m2 - m1) * (2 / 3 - h) * 6;\n }\n else {\n return m1;\n }\n }\n\n h = (number(h) % 360) / 360;\n s = clamp(number(s));l = clamp(number(l));a = clamp(number(a));\n\n m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;\n m1 = l * 2 - m2;\n\n const rgb = [\n hue(h + 1 / 3) * 255,\n hue(h) * 255,\n hue(h - 1 / 3) * 255\n ];\n a = number(a);\n return new Color(rgb, a, 'hsla');\n }\n catch (e) {}\n },\n\n hsv: function(h, s, v) {\n return colorFunctions.hsva(h, s, v, 1.0);\n },\n\n hsva: function(h, s, v, a) {\n h = ((number(h) % 360) / 360) * 360;\n s = number(s);v = number(v);a = number(a);\n\n let i;\n let f;\n i = Math.floor((h / 60) % 6);\n f = (h / 60) - i;\n\n const vs = [v,\n v * (1 - s),\n v * (1 - f * s),\n v * (1 - (1 - f) * s)];\n const perm = [[0, 3, 1],\n [2, 0, 1],\n [1, 0, 3],\n [1, 2, 0],\n [3, 1, 0],\n [0, 1, 2]];\n\n return colorFunctions.rgba(vs[perm[i][0]] * 255,\n vs[perm[i][1]] * 255,\n vs[perm[i][2]] * 255,\n a);\n },\n\n hue: function (color) {\n return new Dimension(toHSL(color).h);\n },\n saturation: function (color) {\n return new Dimension(toHSL(color).s * 100, '%');\n },\n lightness: function (color) {\n return new Dimension(toHSL(color).l * 100, '%');\n },\n hsvhue: function(color) {\n return new Dimension(toHSV(color).h);\n },\n hsvsaturation: function (color) {\n return new Dimension(toHSV(color).s * 100, '%');\n },\n hsvvalue: function (color) {\n return new Dimension(toHSV(color).v * 100, '%');\n },\n red: function (color) {\n return new Dimension(color.rgb[0]);\n },\n green: function (color) {\n return new Dimension(color.rgb[1]);\n },\n blue: function (color) {\n return new Dimension(color.rgb[2]);\n },\n alpha: function (color) {\n return new Dimension(toHSL(color).a);\n },\n luma: function (color) {\n return new Dimension(color.luma() * color.alpha * 100, '%');\n },\n luminance: function (color) {\n const luminance =\n (0.2126 * color.rgb[0] / 255) +\n (0.7152 * color.rgb[1] / 255) +\n (0.0722 * color.rgb[2] / 255);\n\n return new Dimension(luminance * color.alpha * 100, '%');\n },\n saturate: function (color, amount, method) {\n // filter: saturate(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s += hsl.s * amount.value / 100;\n }\n else {\n hsl.s += amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n desaturate: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s -= hsl.s * amount.value / 100;\n }\n else {\n hsl.s -= amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n lighten: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l += hsl.l * amount.value / 100;\n }\n else {\n hsl.l += amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n darken: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l -= hsl.l * amount.value / 100;\n }\n else {\n hsl.l -= amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n fadein: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a += hsl.a * amount.value / 100;\n }\n else {\n hsl.a += amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fadeout: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a -= hsl.a * amount.value / 100;\n }\n else {\n hsl.a -= amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fade: function (color, amount) {\n const hsl = toHSL(color);\n\n hsl.a = amount.value / 100;\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n spin: function (color, amount) {\n const hsl = toHSL(color);\n const hue = (hsl.h + amount.value) % 360;\n\n hsl.h = hue < 0 ? 360 + hue : hue;\n\n return hsla(color, hsl);\n },\n //\n // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein\n // http://sass-lang.com\n //\n mix: function (color1, color2, weight) {\n if (!weight) {\n weight = new Dimension(50);\n }\n const p = weight.value / 100.0;\n const w = p * 2 - 1;\n const a = toHSL(color1).a - toHSL(color2).a;\n\n const w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;\n const w2 = 1 - w1;\n\n const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,\n color1.rgb[1] * w1 + color2.rgb[1] * w2,\n color1.rgb[2] * w1 + color2.rgb[2] * w2];\n\n const alpha = color1.alpha * p + color2.alpha * (1 - p);\n\n return new Color(rgb, alpha);\n },\n greyscale: function (color) {\n return colorFunctions.desaturate(color, new Dimension(100));\n },\n contrast: function (color, dark, light, threshold) {\n // filter: contrast(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n if (typeof light === 'undefined') {\n light = colorFunctions.rgba(255, 255, 255, 1.0);\n }\n if (typeof dark === 'undefined') {\n dark = colorFunctions.rgba(0, 0, 0, 1.0);\n }\n // Figure out which is actually light and dark:\n if (dark.luma() > light.luma()) {\n const t = light;\n light = dark;\n dark = t;\n }\n if (typeof threshold === 'undefined') {\n threshold = 0.43;\n } else {\n threshold = number(threshold);\n }\n if (color.luma() < threshold) {\n return light;\n } else {\n return dark;\n }\n },\n // Changes made in 2.7.0 - Reverted in 3.0.0\n // contrast: function (color, color1, color2, threshold) {\n // // Return which of `color1` and `color2` has the greatest contrast with `color`\n // // according to the standard WCAG contrast ratio calculation.\n // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef\n // // The threshold param is no longer used, in line with SASS.\n // // filter: contrast(3.2);\n // // should be kept as is, so check for color\n // if (!color.rgb) {\n // return null;\n // }\n // if (typeof color1 === 'undefined') {\n // color1 = colorFunctions.rgba(0, 0, 0, 1.0);\n // }\n // if (typeof color2 === 'undefined') {\n // color2 = colorFunctions.rgba(255, 255, 255, 1.0);\n // }\n // var contrast1, contrast2;\n // var luma = color.luma();\n // var luma1 = color1.luma();\n // var luma2 = color2.luma();\n // // Calculate contrast ratios for each color\n // if (luma > luma1) {\n // contrast1 = (luma + 0.05) / (luma1 + 0.05);\n // } else {\n // contrast1 = (luma1 + 0.05) / (luma + 0.05);\n // }\n // if (luma > luma2) {\n // contrast2 = (luma + 0.05) / (luma2 + 0.05);\n // } else {\n // contrast2 = (luma2 + 0.05) / (luma + 0.05);\n // }\n // if (contrast1 > contrast2) {\n // return color1;\n // } else {\n // return color2;\n // }\n // },\n argb: function (color) {\n return new Anonymous(color.toARGB());\n },\n color: function(c) {\n if ((c instanceof Quoted) &&\n (/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value))) {\n const val = c.value.slice(1);\n return new Color(val, undefined, `#${val}`);\n }\n if ((c instanceof Color) || (c = Color.fromKeyword(c.value))) {\n c.value = undefined;\n return c;\n }\n throw {\n type: 'Argument',\n message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF'\n };\n },\n tint: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount);\n },\n shade: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount);\n }\n};\n\nexport default colorFunctions;\n","import Anonymous from '../tree/anonymous';\nimport Keyword from '../tree/keyword';\n\nfunction boolean(condition) {\n return condition ? Keyword.True : Keyword.False;\n}\n\nfunction If(condition, trueValue, falseValue) {\n return condition ? trueValue\n : (falseValue || new Anonymous);\n}\n\nexport default { boolean, 'if': If };\n","import Color from '../tree/color';\n\n// Color Blending\n// ref: http://www.w3.org/TR/compositing-1\n\nfunction colorBlend(mode, color1, color2) {\n const ab = color1.alpha; // result\n\n let // backdrop\n cb;\n\n const as = color2.alpha;\n\n let // source\n cs;\n\n let ar;\n let cr;\n const r = [];\n\n ar = as + ab * (1 - as);\n for (let i = 0; i < 3; i++) {\n cb = color1.rgb[i] / 255;\n cs = color2.rgb[i] / 255;\n cr = mode(cb, cs);\n if (ar) {\n cr = (as * cs + ab * (cb -\n as * (cb + cs - cr))) / ar;\n }\n r[i] = cr * 255;\n }\n\n return new Color(r, ar);\n}\n\nconst colorBlendModeFunctions = {\n multiply: function(cb, cs) {\n return cb * cs;\n },\n screen: function(cb, cs) {\n return cb + cs - cb * cs;\n },\n overlay: function(cb, cs) {\n cb *= 2;\n return (cb <= 1) ?\n colorBlendModeFunctions.multiply(cb, cs) :\n colorBlendModeFunctions.screen(cb - 1, cs);\n },\n softlight: function(cb, cs) {\n let d = 1;\n let e = cb;\n if (cs > 0.5) {\n e = 1;\n d = (cb > 0.25) ? Math.sqrt(cb)\n : ((16 * cb - 12) * cb + 4) * cb;\n }\n return cb - (1 - 2 * cs) * e * (d - cb);\n },\n hardlight: function(cb, cs) {\n return colorBlendModeFunctions.overlay(cs, cb);\n },\n difference: function(cb, cs) {\n return Math.abs(cb - cs);\n },\n exclusion: function(cb, cs) {\n return cb + cs - 2 * cb * cs;\n },\n\n // non-w3c functions:\n average: function(cb, cs) {\n return (cb + cs) / 2;\n },\n negation: function(cb, cs) {\n return 1 - Math.abs(cb + cs - 1);\n }\n};\n\nfor (const f in colorBlendModeFunctions) {\n if (colorBlendModeFunctions.hasOwnProperty(f)) {\n colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]);\n }\n}\n\nexport default colorBlend;\n","import Comment from '../tree/comment';\nimport Dimension from '../tree/dimension';\nimport Declaration from '../tree/declaration';\nimport Expression from '../tree/expression';\nimport Ruleset from '../tree/ruleset';\nimport Selector from '../tree/selector';\nimport Element from '../tree/element';\nimport Quote from '../tree/quoted';\n\nconst getItemsFromNode = node => {\n // handle non-array values as an array of length 1\n // return 'undefined' if index is invalid\n const items = Array.isArray(node.value) ?\n node.value : Array(node);\n\n return items;\n};\n\nexport default {\n _SELF: function(n) {\n return n;\n },\n extract: function(values, index) {\n index = index.value - 1; // (1-based index)\n\n return getItemsFromNode(values)[index];\n },\n length: function(values) {\n return new Dimension(getItemsFromNode(values).length);\n },\n /**\n * Creates a Less list of incremental values.\n * Modeled after Lodash's range function, also exists natively in PHP\n * \n * @param {Dimension} [start=1]\n * @param {Dimension} end - e.g. 10 or 10px - unit is added to output\n * @param {Dimension} [step=1] \n */\n range: function(start, end, step) {\n let from;\n let to;\n let stepValue = 1;\n const list = [];\n if (end) {\n to = end;\n from = start.value;\n if (step) {\n stepValue = step.value;\n }\n }\n else {\n from = 1;\n to = start;\n }\n\n for (let i = from; i <= to.value; i += stepValue) {\n list.push(new Dimension(i, to.unit));\n }\n\n return new Expression(list);\n },\n each: function(list, rs) {\n const rules = [];\n let newRules;\n let iterator;\n\n if (list.value && !(list instanceof Quote)) {\n if (Array.isArray(list.value)) {\n iterator = list.value;\n } else {\n iterator = [list.value];\n }\n } else if (list.ruleset) {\n iterator = list.ruleset.rules;\n } else if (list.rules) {\n iterator = list.rules;\n } else if (Array.isArray(list)) {\n iterator = list;\n } else {\n iterator = [list];\n }\n\n let valueName = '@value';\n let keyName = '@key';\n let indexName = '@index';\n\n if (rs.params) {\n valueName = rs.params[0] && rs.params[0].name;\n keyName = rs.params[1] && rs.params[1].name;\n indexName = rs.params[2] && rs.params[2].name;\n rs = rs.rules;\n } else {\n rs = rs.ruleset;\n }\n\n for (let i = 0; i < iterator.length; i++) {\n let key;\n let value;\n const item = iterator[i];\n if (item instanceof Declaration) {\n key = typeof item.name === 'string' ? item.name : item.name[0].value;\n value = item.value;\n } else {\n key = new Dimension(i + 1);\n value = item;\n }\n\n if (item instanceof Comment) {\n continue;\n }\n\n newRules = rs.rules.slice(0);\n if (valueName) {\n newRules.push(new Declaration(valueName,\n value,\n false, false, this.index, this.currentFileInfo));\n }\n if (indexName) {\n newRules.push(new Declaration(indexName,\n new Dimension(i + 1),\n false, false, this.index, this.currentFileInfo));\n }\n if (keyName) {\n newRules.push(new Declaration(keyName,\n key,\n false, false, this.index, this.currentFileInfo));\n }\n\n rules.push(new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n newRules,\n rs.strictImports,\n rs.visibilityInfo()\n ));\n }\n\n return new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n rules,\n rs.strictImports,\n rs.visibilityInfo()\n ).eval(this.context);\n }\n};\n","import Dimension from '../tree/dimension';\n\nconst MathHelper = (fn, unit, n) => {\n if (!(n instanceof Dimension)) {\n throw { type: 'Argument', message: 'argument must be a number' };\n }\n if (unit == null) {\n unit = n.unit;\n } else {\n n = n.unify();\n }\n return new Dimension(fn(parseFloat(n.value)), unit);\n};\n\nexport default MathHelper;","import mathHelper from './math-helper.js';\n\nconst mathFunctions = {\n // name, unit\n ceil: null,\n floor: null,\n sqrt: null,\n abs: null,\n tan: '',\n sin: '',\n cos: '',\n atan: 'rad',\n asin: 'rad',\n acos: 'rad'\n};\n\nfor (const f in mathFunctions) {\n if (mathFunctions.hasOwnProperty(f)) {\n mathFunctions[f] = mathHelper.bind(null, Math[f], mathFunctions[f]);\n }\n}\n\nmathFunctions.round = (n, f) => {\n const fraction = typeof f === 'undefined' ? 0 : f.value;\n return mathHelper(num => num.toFixed(fraction), null, n);\n};\n\nexport default mathFunctions;\n","import Dimension from '../tree/dimension';\nimport Anonymous from '../tree/anonymous';\nimport mathHelper from './math-helper.js';\n\nconst minMax = function (isMin, args) {\n args = Array.prototype.slice.call(args);\n switch (args.length) {\n case 0: throw { type: 'Argument', message: 'one or more arguments required' };\n }\n let i; // key is the unit.toString() for unified Dimension values,\n let j;\n let current;\n let currentUnified;\n let referenceUnified;\n let unit;\n let unitStatic;\n let unitClone;\n\n const // elems only contains original argument values.\n order = [];\n\n const values = {};\n // value is the index into the order array.\n for (i = 0; i < args.length; i++) {\n current = args[i];\n if (!(current instanceof Dimension)) {\n if (Array.isArray(args[i].value)) {\n Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value));\n }\n continue;\n }\n currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify();\n unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString();\n unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic;\n unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone;\n j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit];\n if (j === undefined) {\n if (unitStatic !== undefined && unit !== unitStatic) {\n throw { type: 'Argument', message: 'incompatible types' };\n }\n values[unit] = order.length;\n order.push(current);\n continue;\n }\n referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify();\n if ( isMin && currentUnified.value < referenceUnified.value ||\n !isMin && currentUnified.value > referenceUnified.value) {\n order[j] = current;\n }\n }\n if (order.length == 1) {\n return order[0];\n }\n args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', ');\n return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`);\n};\n\nexport default {\n min: function(...args) {\n return minMax(true, args);\n },\n max: function(...args) {\n return minMax(false, args);\n },\n convert: function (val, unit) {\n return val.convertTo(unit.value);\n },\n pi: function () {\n return new Dimension(Math.PI);\n },\n mod: function(a, b) {\n return new Dimension(a.value % b.value, a.unit);\n },\n pow: function(x, y) {\n if (typeof x === 'number' && typeof y === 'number') {\n x = new Dimension(x);\n y = new Dimension(y);\n } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) {\n throw { type: 'Argument', message: 'arguments must be numbers' };\n }\n\n return new Dimension(Math.pow(x.value, y.value), x.unit);\n },\n percentage: function (n) {\n const result = mathHelper(num => num * 100, '%', n);\n\n return result;\n }\n};\n","/**\n * Plugin Manager\n */\nclass PluginManager {\n constructor(less) {\n this.less = less;\n this.visitors = [];\n this.preProcessors = [];\n this.postProcessors = [];\n this.installedPlugins = [];\n this.fileManagers = [];\n this.iterator = -1;\n this.pluginCache = {};\n this.Loader = new less.PluginLoader(less);\n }\n\n /**\n * Adds all the plugins in the array\n * @param {Array} plugins\n */\n addPlugins(plugins) {\n if (plugins) {\n for (let i = 0; i < plugins.length; i++) {\n this.addPlugin(plugins[i]);\n }\n }\n }\n\n /**\n *\n * @param plugin\n * @param {String} filename\n */\n addPlugin(plugin, filename, functionRegistry) {\n this.installedPlugins.push(plugin);\n if (filename) {\n this.pluginCache[filename] = plugin;\n }\n if (plugin.install) {\n plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry);\n }\n }\n\n /**\n *\n * @param filename\n */\n get(filename) {\n return this.pluginCache[filename];\n }\n\n /**\n * Adds a visitor. The visitor object has options on itself to determine\n * when it should run.\n * @param visitor\n */\n addVisitor(visitor) {\n this.visitors.push(visitor);\n }\n\n /**\n * Adds a pre processor object\n * @param {object} preProcessor\n * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import\n */\n addPreProcessor(preProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) {\n if (this.preProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.preProcessors.splice(indexToInsertAt, 0, {preProcessor, priority});\n }\n\n /**\n * Adds a post processor object\n * @param {object} postProcessor\n * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression\n */\n addPostProcessor(postProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) {\n if (this.postProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.postProcessors.splice(indexToInsertAt, 0, {postProcessor, priority});\n }\n\n /**\n *\n * @param manager\n */\n addFileManager(manager) {\n this.fileManagers.push(manager);\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPreProcessors() {\n const preProcessors = [];\n for (let i = 0; i < this.preProcessors.length; i++) {\n preProcessors.push(this.preProcessors[i].preProcessor);\n }\n return preProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPostProcessors() {\n const postProcessors = [];\n for (let i = 0; i < this.postProcessors.length; i++) {\n postProcessors.push(this.postProcessors[i].postProcessor);\n }\n return postProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getVisitors() {\n return this.visitors;\n }\n\n visitor() {\n const self = this;\n return {\n first: function() {\n self.iterator = -1;\n return self.visitors[self.iterator];\n },\n get: function() {\n self.iterator += 1;\n return self.visitors[self.iterator];\n }\n };\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getFileManagers() {\n return this.fileManagers;\n }\n}\n\nlet pm;\n\nconst PluginManagerFactory = (less, newFactory) => {\n if (newFactory || !pm) {\n pm = new PluginManager(less);\n }\n return pm;\n };\n\n//\nexport default PluginManagerFactory;\n","import Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport Quote from '../tree/quoted';\nimport JavaScript from '../tree/javascript';\n\nexport default {\n e: function (str) {\n return new Quote('\"', str instanceof JavaScript ? str.evaluated : str.value, true);\n },\n escape: function (str) {\n return new Anonymous(\n encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B')\n .replace(/\\(/g, '%28').replace(/\\)/g, '%29'));\n },\n replace: function (string, pattern, replacement, flags) {\n let result = string.value;\n replacement = (replacement.type === 'Quoted') ?\n replacement.value : replacement.toCSS();\n result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement);\n return new Quoted(string.quote || '', result, string.escaped);\n },\n '%': function (string /* arg, arg, ... */) {\n const args = Array.prototype.slice.call(arguments, 1);\n let result = string.value;\n\n for (let i = 0; i < args.length; i++) {\n /* jshint loopfunc:true */\n result = result.replace(/%[sda]/i, token => {\n const value = ((args[i].type === 'Quoted') &&\n token.match(/s/i)) ? args[i].value : args[i].toCSS();\n return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;\n });\n }\n result = result.replace(/%%/g, '%');\n return new Quoted(string.quote || '', result, string.escaped);\n }\n};\n","import Keyword from '../tree/keyword';\nimport DetachedRuleset from '../tree/detached-ruleset';\nimport Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport URL from '../tree/url';\nimport Operation from '../tree/operation';\n\nconst isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False;\nconst isunit = (n, unit) => {\n if (unit === undefined) {\n throw { type: 'Argument', message: 'missing the required second argument to isunit.' };\n }\n unit = typeof unit.value === 'string' ? unit.value : unit;\n if (typeof unit !== 'string') {\n throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' };\n }\n return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False;\n};\n\nexport default {\n isruleset: function (n) {\n return isa(n, DetachedRuleset);\n },\n iscolor: function (n) {\n return isa(n, Color);\n },\n isnumber: function (n) {\n return isa(n, Dimension);\n },\n isstring: function (n) {\n return isa(n, Quoted);\n },\n iskeyword: function (n) {\n return isa(n, Keyword);\n },\n isurl: function (n) {\n return isa(n, URL);\n },\n ispixel: function (n) {\n return isunit(n, 'px');\n },\n ispercentage: function (n) {\n return isunit(n, '%');\n },\n isem: function (n) {\n return isunit(n, 'em');\n },\n isunit,\n unit: function (val, unit) {\n if (!(val instanceof Dimension)) {\n throw { type: 'Argument',\n message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` };\n }\n if (unit) {\n if (unit instanceof Keyword) {\n unit = unit.value;\n } else {\n unit = unit.toCSS();\n }\n } else {\n unit = '';\n }\n return new Dimension(val.value, unit);\n },\n 'get-unit': function (n) {\n return new Anonymous(n.unit);\n }\n};\n","import functionRegistry from './function-registry';\nimport functionCaller from './function-caller';\n\nimport boolean from './boolean';\nimport defaultFunc from './default';\nimport color from './color';\nimport colorBlending from './color-blending';\nimport dataUri from './data-uri';\nimport list from './list';\nimport math from './math';\nimport number from './number';\nimport string from './string';\nimport svg from './svg';\nimport types from './types';\n\nexport default environment => {\n const functions = { functionRegistry, functionCaller };\n\n // register functions\n functionRegistry.addMultiple(boolean);\n functionRegistry.addMultiple(defaultFunc);\n functionRegistry.addMultiple(color);\n functionRegistry.addMultiple(colorBlending);\n functionRegistry.addMultiple(dataUri(environment));\n functionRegistry.addMultiple(list);\n functionRegistry.addMultiple(math);\n functionRegistry.addMultiple(number);\n functionRegistry.addMultiple(string);\n functionRegistry.addMultiple(svg(environment));\n functionRegistry.addMultiple(types);\n\n return functions;\n};\n","import Quoted from '../tree/quoted';\nimport URL from '../tree/url';\nimport * as utils from '../utils';\nimport logger from '../logger';\n\nexport default environment => {\n \n const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); \n\n return { 'data-uri': function(mimetypeNode, filePathNode) {\n\n if (!filePathNode) {\n filePathNode = mimetypeNode;\n mimetypeNode = null;\n }\n\n let mimetype = mimetypeNode && mimetypeNode.value;\n let filePath = filePathNode.value;\n const currentFileInfo = this.currentFileInfo;\n const currentDirectory = currentFileInfo.rewriteUrls ?\n currentFileInfo.currentDirectory : currentFileInfo.entryPath;\n\n const fragmentStart = filePath.indexOf('#');\n let fragment = '';\n if (fragmentStart !== -1) {\n fragment = filePath.slice(fragmentStart);\n filePath = filePath.slice(0, fragmentStart);\n }\n const context = utils.clone(this.context);\n context.rawBuffer = true;\n\n const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true);\n\n if (!fileManager) {\n return fallback(this, filePathNode);\n }\n\n let useBase64 = false;\n\n // detect the mimetype if not given\n if (!mimetypeNode) {\n\n mimetype = environment.mimeLookup(filePath);\n\n if (mimetype === 'image/svg+xml') {\n useBase64 = false;\n } else {\n // use base 64 unless it's an ASCII or UTF-8 format\n const charset = environment.charsetLookup(mimetype);\n useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0;\n }\n if (useBase64) { mimetype += ';base64'; }\n }\n else {\n useBase64 = /;base64$/.test(mimetype);\n }\n\n const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment);\n if (!fileSync.contents) {\n logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`);\n return fallback(this, filePathNode || mimetypeNode);\n }\n let buf = fileSync.contents;\n if (useBase64 && !environment.encodeBase64) {\n return fallback(this, filePathNode);\n }\n\n buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf);\n\n const uri = `data:${mimetype},${buf}${fragment}`;\n\n return new URL(new Quoted(`\"${uri}\"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Expression from '../tree/expression';\nimport Quoted from '../tree/quoted';\nimport URL from '../tree/url';\n\nexport default environment => {\n return { 'svg-gradient': function(direction) {\n let stops;\n let gradientDirectionSvg;\n let gradientType = 'linear';\n let rectangleDimension = 'x=\"0\" y=\"0\" width=\"1\" height=\"1\"';\n const renderEnv = {compress: false};\n let returner;\n const directionValue = direction.toCSS(renderEnv);\n let i;\n let color;\n let position;\n let positionValue;\n let alpha;\n\n function throwArgumentDescriptor() {\n throw { type: 'Argument',\n message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' +\n ' end_color [end_position] or direction, color list' };\n }\n\n if (arguments.length == 2) {\n if (arguments[1].value.length < 2) {\n throwArgumentDescriptor();\n }\n stops = arguments[1].value;\n } else if (arguments.length < 3) {\n throwArgumentDescriptor();\n } else {\n stops = Array.prototype.slice.call(arguments, 1);\n }\n\n switch (directionValue) {\n case 'to bottom':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"0%\" y2=\"100%\"';\n break;\n case 'to right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'to bottom right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"100%\"';\n break;\n case 'to top right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"100%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'ellipse':\n case 'ellipse at center':\n gradientType = 'radial';\n gradientDirectionSvg = 'cx=\"50%\" cy=\"50%\" r=\"75%\"';\n rectangleDimension = 'x=\"-50\" y=\"-50\" width=\"101\" height=\"101\"';\n break;\n default:\n throw { type: 'Argument', message: 'svg-gradient direction must be \\'to bottom\\', \\'to right\\',' +\n ' \\'to bottom right\\', \\'to top right\\' or \\'ellipse at center\\'' };\n }\n returner = `<${gradientType}Gradient id=\"g\" ${gradientDirectionSvg}>`;\n\n for (i = 0; i < stops.length; i += 1) {\n if (stops[i] instanceof Expression) {\n color = stops[i].value[0];\n position = stops[i].value[1];\n } else {\n color = stops[i];\n position = undefined;\n }\n\n if (!(color instanceof Color) || (!((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension))) {\n throwArgumentDescriptor();\n }\n positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%';\n alpha = color.alpha;\n returner += ``;\n }\n returner += ``;\n\n returner = encodeURIComponent(returner);\n\n returner = `data:image/svg+xml,${returner}`;\n return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import contexts from './contexts';\nimport visitor from './visitors';\nimport tree from './tree';\n\nexport default (root, options = {}) => {\n let evaldRoot;\n let variables = options.variables;\n const evalEnv = new contexts.Eval(options);\n\n //\n // Allows setting variables with a hash, so:\n //\n // `{ color: new tree.Color('#f01') }` will become:\n //\n // new tree.Declaration('@color',\n // new tree.Value([\n // new tree.Expression([\n // new tree.Color('#f01')\n // ])\n // ])\n // )\n //\n if (typeof variables === 'object' && !Array.isArray(variables)) {\n variables = Object.keys(variables).map(k => {\n let value = variables[k];\n\n if (!(value instanceof tree.Value)) {\n if (!(value instanceof tree.Expression)) {\n value = new tree.Expression([value]);\n }\n value = new tree.Value([value]);\n }\n return new tree.Declaration(`@${k}`, value, false, null, 0);\n });\n evalEnv.frames = [new tree.Ruleset(null, variables)];\n }\n\n const visitors = [\n new visitor.JoinSelectorVisitor(),\n new visitor.MarkVisibleSelectorsVisitor(true),\n new visitor.ExtendVisitor(),\n new visitor.ToCSSVisitor({compress: Boolean(options.compress)})\n ];\n\n const preEvalVisitors = [];\n let v;\n let visitorIterator;\n\n /**\n * first() / get() allows visitors to be added while visiting\n * \n * @todo Add scoping for visitors just like functions for @plugin; right now they're global\n */\n if (options.pluginManager) {\n visitorIterator = options.pluginManager.visitor();\n for (var i = 0; i < 2; i++) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (v.isPreEvalVisitor) {\n if (i === 0 || preEvalVisitors.indexOf(v) === -1) {\n preEvalVisitors.push(v);\n v.run(root);\n }\n }\n else {\n if (i === 0 || visitors.indexOf(v) === -1) {\n if (v.isPreVisitor) {\n visitors.unshift(v);\n }\n else {\n visitors.push(v);\n }\n }\n }\n }\n }\n }\n\n evaldRoot = root.eval(evalEnv);\n\n for (var i = 0; i < visitors.length; i++) {\n visitors[i].run(evaldRoot);\n }\n\n // Run any remaining visitors added after eval pass\n if (options.pluginManager) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (visitors.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) {\n v.run(evaldRoot);\n }\n }\n }\n\n return evaldRoot;\n};\n","import data from './data';\nimport tree from './tree';\nimport Environment from './environment/environment';\nimport AbstractFileManager from './environment/abstract-file-manager';\nimport AbstractPluginLoader from './environment/abstract-plugin-loader';\nimport visitors from './visitors';\nimport Parser from './parser/parser';\nimport Functions from './functions';\nimport contexts from './contexts';\nimport sourceMapOutput from './source-map-output';\nimport sourceMapBuilder from './source-map-builder';\nimport parseTree from './parse-tree';\nimport importManager from './import-manager';\nimport Render from './render';\nimport Parse from './parse';\nimport LessError from './less-error';\nimport transformTree from './transform-tree';\nimport * as utils from './utils';\nimport PluginManager from './plugin-manager';\nimport logger from './logger';\n\nexport default (environment, fileManagers) => {\n const SourceMapOutput = sourceMapOutput(environment);\n const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment);\n const ParseTree = parseTree(SourceMapBuilder);\n const ImportManager = importManager(environment);\n const render = Render(environment, ParseTree, ImportManager);\n const parse = Parse(environment, ParseTree, ImportManager);\n const environ = new Environment(environment, fileManagers);\n const functions = Functions(environment);\n\n const initial = {\n version: [3, 9, 0],\n data,\n tree,\n Environment,\n AbstractFileManager,\n AbstractPluginLoader,\n environment: environ,\n visitors,\n Parser,\n functions,\n contexts,\n SourceMapOutput,\n SourceMapBuilder,\n ParseTree,\n ImportManager,\n render,\n parse,\n LessError,\n transformTree,\n utils,\n PluginManager,\n logger\n };\n\n // Create a public API\n\n const ctor = t => (function(...args) {\n const obj = Object.create(t.prototype);\n t.apply(obj, Array.prototype.slice.call(args, 0));\n return obj;\n });\n let t;\n const api = Object.create(initial);\n for (const n in initial.tree) {\n /* eslint guard-for-in: 0 */\n t = initial.tree[n];\n if (typeof t === 'function') {\n api[n.toLowerCase()] = ctor(t);\n }\n else {\n api[n] = Object.create(null);\n for (const o in t) {\n /* eslint guard-for-in: 0 */\n api[n][o.toLowerCase()] = ctor(t[o]);\n }\n }\n }\n\n return api;\n};\n","export default environment => {\n class SourceMapOutput {\n constructor(options) {\n this._css = [];\n this._rootNode = options.rootNode;\n this._contentsMap = options.contentsMap;\n this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap;\n if (options.sourceMapFilename) {\n this._sourceMapFilename = options.sourceMapFilename.replace(/\\\\/g, '/');\n }\n this._outputFilename = options.outputFilename;\n this.sourceMapURL = options.sourceMapURL;\n if (options.sourceMapBasepath) {\n this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\\\/g, '/');\n }\n if (options.sourceMapRootpath) {\n this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\\\/g, '/');\n if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') {\n this._sourceMapRootpath += '/';\n }\n } else {\n this._sourceMapRootpath = '';\n }\n this._outputSourceFiles = options.outputSourceFiles;\n this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator();\n\n this._lineNumber = 0;\n this._column = 0;\n }\n\n removeBasepath(path) {\n if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) {\n path = path.substring(this._sourceMapBasepath.length);\n if (path.charAt(0) === '\\\\' || path.charAt(0) === '/') {\n path = path.substring(1);\n }\n }\n\n return path;\n }\n\n normalizeFilename(filename) {\n filename = filename.replace(/\\\\/g, '/');\n filename = this.removeBasepath(filename);\n return (this._sourceMapRootpath || '') + filename;\n }\n\n add(chunk, fileInfo, index, mapLines) {\n // ignore adding empty strings\n if (!chunk) {\n return;\n }\n\n let lines;\n let sourceLines;\n let columns;\n let sourceColumns;\n let i;\n\n if (fileInfo && fileInfo.filename) {\n let inputSource = this._contentsMap[fileInfo.filename];\n\n // remove vars/banner added to the top of the file\n if (this._contentsIgnoredCharsMap[fileInfo.filename]) {\n // adjust the index\n index -= this._contentsIgnoredCharsMap[fileInfo.filename];\n if (index < 0) { index = 0; }\n // adjust the source\n inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]);\n }\n\n // ignore empty content\n if (inputSource === undefined) {\n return;\n }\n\n inputSource = inputSource.substring(0, index);\n sourceLines = inputSource.split('\\n');\n sourceColumns = sourceLines[sourceLines.length - 1];\n }\n\n lines = chunk.split('\\n');\n columns = lines[lines.length - 1];\n\n if (fileInfo && fileInfo.filename) {\n if (!mapLines) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column},\n original: { line: sourceLines.length, column: sourceColumns.length},\n source: this.normalizeFilename(fileInfo.filename)});\n } else {\n for (i = 0; i < lines.length; i++) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0},\n original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0},\n source: this.normalizeFilename(fileInfo.filename)});\n }\n }\n }\n\n if (lines.length === 1) {\n this._column += columns.length;\n } else {\n this._lineNumber += lines.length - 1;\n this._column = columns.length;\n }\n\n this._css.push(chunk);\n }\n\n isEmpty() {\n return this._css.length === 0;\n }\n\n toCSS(context) {\n this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null });\n\n if (this._outputSourceFiles) {\n for (const filename in this._contentsMap) {\n if (this._contentsMap.hasOwnProperty(filename)) {\n let source = this._contentsMap[filename];\n if (this._contentsIgnoredCharsMap[filename]) {\n source = source.slice(this._contentsIgnoredCharsMap[filename]);\n }\n this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source);\n }\n }\n }\n\n this._rootNode.genCSS(context, this);\n\n if (this._css.length > 0) {\n let sourceMapURL;\n const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON());\n\n if (this.sourceMapURL) {\n sourceMapURL = this.sourceMapURL;\n } else if (this._sourceMapFilename) {\n sourceMapURL = this._sourceMapFilename;\n }\n this.sourceMapURL = sourceMapURL;\n\n this.sourceMap = sourceMapContent;\n }\n\n return this._css.join('');\n }\n }\n\n return SourceMapOutput;\n};\n","export default (SourceMapOutput, environment) => {\n class SourceMapBuilder {\n constructor(options) {\n this.options = options;\n }\n\n toCSS(rootNode, options, imports) {\n const sourceMapOutput = new SourceMapOutput(\n {\n contentsIgnoredCharsMap: imports.contentsIgnoredChars,\n rootNode,\n contentsMap: imports.contents,\n sourceMapFilename: this.options.sourceMapFilename,\n sourceMapURL: this.options.sourceMapURL,\n outputFilename: this.options.sourceMapOutputFilename,\n sourceMapBasepath: this.options.sourceMapBasepath,\n sourceMapRootpath: this.options.sourceMapRootpath,\n outputSourceFiles: this.options.outputSourceFiles,\n sourceMapGenerator: this.options.sourceMapGenerator,\n sourceMapFileInline: this.options.sourceMapFileInline\n });\n\n const css = sourceMapOutput.toCSS(options);\n this.sourceMap = sourceMapOutput.sourceMap;\n this.sourceMapURL = sourceMapOutput.sourceMapURL;\n if (this.options.sourceMapInputFilename) {\n this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename);\n }\n if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) {\n this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL);\n }\n return css + this.getCSSAppendage();\n }\n\n getCSSAppendage() {\n\n let sourceMapURL = this.sourceMapURL;\n if (this.options.sourceMapFileInline) {\n if (this.sourceMap === undefined) {\n return '';\n }\n sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`;\n }\n\n if (sourceMapURL) {\n return `/*# sourceMappingURL=${sourceMapURL} */`;\n }\n return '';\n }\n\n getExternalSourceMap() {\n return this.sourceMap;\n }\n\n setExternalSourceMap(sourceMap) {\n this.sourceMap = sourceMap;\n }\n\n isInline() {\n return this.options.sourceMapFileInline;\n }\n\n getSourceMapURL() {\n return this.sourceMapURL;\n }\n\n getOutputFilename() {\n return this.options.sourceMapOutputFilename;\n }\n\n getInputFilename() {\n return this.sourceMapInputFilename;\n }\n }\n\n return SourceMapBuilder;\n};\n","import LessError from './less-error';\nimport transformTree from './transform-tree';\nimport logger from './logger';\n\nexport default SourceMapBuilder => {\n class ParseTree {\n constructor(root, imports) {\n this.root = root;\n this.imports = imports;\n }\n\n toCSS(options) {\n let evaldRoot;\n const result = {};\n let sourceMapBuilder;\n try {\n evaldRoot = transformTree(this.root, options);\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n try {\n const compress = Boolean(options.compress);\n if (compress) {\n logger.warn('The compress option has been deprecated. We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.');\n }\n\n const toCSSOptions = {\n compress,\n dumpLineNumbers: options.dumpLineNumbers,\n strictUnits: Boolean(options.strictUnits),\n numPrecision: 8};\n\n if (options.sourceMap) {\n sourceMapBuilder = new SourceMapBuilder(options.sourceMap);\n result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports);\n } else {\n result.css = evaldRoot.toCSS(toCSSOptions);\n }\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n if (options.pluginManager) {\n const postProcessors = options.pluginManager.getPostProcessors();\n for (let i = 0; i < postProcessors.length; i++) {\n result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options, imports: this.imports });\n }\n }\n if (options.sourceMap) {\n result.map = sourceMapBuilder.getExternalSourceMap();\n }\n\n result.imports = [];\n for (const file in this.imports.files) {\n if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) {\n result.imports.push(file);\n }\n }\n return result;\n }\n }\n\n return ParseTree;\n};\n","import contexts from './contexts';\nimport Parser from './parser/parser';\nimport LessError from './less-error';\nimport * as utils from './utils';\nimport logger from './logger';\n\nexport default environment => {\n // FileInfo = {\n // 'rewriteUrls' - option - whether to adjust URL's to be relative\n // 'filename' - full resolved filename of current file\n // 'rootpath' - path to append to normal URLs for this node\n // 'currentDirectory' - path to the current file, absolute\n // 'rootFilename' - filename of the base file\n // 'entryPath' - absolute path to the entry file\n // 'reference' - whether the file should not be output and only output parts that are referenced\n\n class ImportManager {\n constructor(less, context, rootFileInfo) {\n this.less = less;\n this.rootFilename = rootFileInfo.filename;\n this.paths = context.paths || []; // Search paths, when importing\n this.contents = {}; // map - filename to contents of all the files\n this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore\n this.mime = context.mime;\n this.error = null;\n this.context = context;\n // Deprecated? Unused outside of here, could be useful.\n this.queue = []; // Files which haven't been imported yet\n this.files = {}; // Holds the imported parse trees.\n }\n\n /**\n * Add an import to be imported\n * @param path - the raw path\n * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension)\n * @param currentFileInfo - the current file info (used for instance to work out relative paths)\n * @param importOptions - import options\n * @param callback - callback for when it is imported\n */\n push(path, tryAppendExtension, currentFileInfo, importOptions, callback) {\n const importManager = this;\n const pluginLoader = this.context.pluginManager.Loader;\n\n this.queue.push(path);\n\n const fileParsedFunc = (e, root, fullPath) => {\n importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue\n\n const importedEqualsRoot = fullPath === importManager.rootFilename;\n if (importOptions.optional && e) {\n callback(null, {rules:[]}, false, null);\n logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`);\n }\n else {\n // Inline imports aren't cached here.\n // If we start to cache them, please make sure they won't conflict with non-inline imports of the\n // same name as they used to do before this comment and the condition below have been added.\n if (!importManager.files[fullPath] && !importOptions.inline) {\n importManager.files[fullPath] = { root, options: importOptions };\n }\n if (e && !importManager.error) { importManager.error = e; }\n callback(e, root, importedEqualsRoot, fullPath);\n }\n };\n\n const newFileInfo = {\n rewriteUrls: this.context.rewriteUrls,\n entryPath: currentFileInfo.entryPath,\n rootpath: currentFileInfo.rootpath,\n rootFilename: currentFileInfo.rootFilename\n };\n\n const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment);\n\n if (!fileManager) {\n fileParsedFunc({ message: `Could not find a file-manager for ${path}` });\n return;\n }\n\n const loadFileCallback = loadedFile => {\n let plugin;\n const resolvedFilename = loadedFile.filename;\n const contents = loadedFile.contents.replace(/^\\uFEFF/, '');\n\n // Pass on an updated rootpath if path of imported file is relative and file\n // is in a (sub|sup) directory\n //\n // Examples:\n // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/',\n // then rootpath should become 'less/module/nav/'\n // - If path of imported file is '../mixins.less' and rootpath is 'less/',\n // then rootpath should become 'less/../'\n newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename);\n if (newFileInfo.rewriteUrls) {\n newFileInfo.rootpath = fileManager.join(\n (importManager.context.rootpath || ''),\n fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath));\n\n if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) {\n newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath);\n }\n }\n newFileInfo.filename = resolvedFilename;\n\n const newEnv = new contexts.Parse(importManager.context);\n\n newEnv.processImports = false;\n importManager.contents[resolvedFilename] = contents;\n\n if (currentFileInfo.reference || importOptions.reference) {\n newFileInfo.reference = true;\n }\n\n if (importOptions.isPlugin) {\n plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo);\n if (plugin instanceof LessError) {\n fileParsedFunc(plugin, null, resolvedFilename);\n }\n else {\n fileParsedFunc(null, plugin, resolvedFilename);\n }\n } else if (importOptions.inline) {\n fileParsedFunc(null, contents, resolvedFilename);\n } else {\n\n // import (multiple) parse trees apparently get altered and can't be cached.\n // TODO: investigate why this is\n if (importManager.files[resolvedFilename]\n && !importManager.files[resolvedFilename].options.multiple\n && !importOptions.multiple) {\n\n fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename);\n }\n else {\n new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => {\n fileParsedFunc(e, root, resolvedFilename);\n });\n }\n }\n };\n let promise;\n const context = utils.clone(this.context);\n\n if (tryAppendExtension) {\n context.ext = importOptions.isPlugin ? '.js' : '.less';\n }\n\n if (importOptions.isPlugin) {\n context.mime = 'application/javascript';\n promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager);\n }\n else {\n promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment,\n (err, loadedFile) => {\n if (err) {\n fileParsedFunc(err);\n } else {\n loadFileCallback(loadedFile);\n }\n });\n }\n if (promise) {\n promise.then(loadFileCallback, fileParsedFunc);\n }\n }\n }\n\n return ImportManager;\n};\n","let PromiseConstructor;\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const render = function (input, options, callback) {\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n render.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n this.parse(input, options, (err, root, imports, options) => {\n if (err) { return callback(err); }\n\n let result;\n try {\n const parseTree = new ParseTree(root, imports);\n result = parseTree.toCSS(options);\n }\n catch (err) { return callback(err); }\n\n callback(null, result);\n });\n }\n };\n\n return render;\n};\n","let PromiseConstructor;\nimport contexts from './contexts';\nimport Parser from './parser/parser';\nimport PluginManager from './plugin-manager';\nimport LessError from './less-error';\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const parse = function (input, options, callback) {\n\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n parse.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n let context;\n let rootFileInfo;\n const pluginManager = new PluginManager(this, !options.reUsePluginManager);\n\n options.pluginManager = pluginManager;\n\n context = new contexts.Parse(options);\n\n if (options.rootFileInfo) {\n rootFileInfo = options.rootFileInfo;\n } else {\n const filename = options.filename || 'input';\n const entryPath = filename.replace(/[^\\/\\\\]*$/, '');\n rootFileInfo = {\n filename,\n rewriteUrls: context.rewriteUrls,\n rootpath: context.rootpath || '',\n currentDirectory: entryPath,\n entryPath,\n rootFilename: filename\n };\n // add in a missing trailing slash\n if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') {\n rootFileInfo.rootpath += '/';\n }\n }\n\n const imports = new ImportManager(this, context, rootFileInfo);\n this.importManager = imports;\n\n // TODO: allow the plugins to be just a list of paths or names\n // Do an async plugin queue like lessc\n\n if (options.plugins) {\n options.plugins.forEach(plugin => {\n let evalResult;\n let contents;\n if (plugin.fileContent) {\n contents = plugin.fileContent.replace(/^\\uFEFF/, '');\n evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename);\n if (evalResult instanceof LessError) {\n return callback(evalResult);\n }\n }\n else {\n pluginManager.addPlugin(plugin);\n }\n });\n }\n\n new Parser(context, imports, rootFileInfo)\n .parse(input, (e, root) => {\n if (e) { return callback(e); }\n callback(null, root, imports, options);\n }, options);\n }\n };\n return parse;\n};\n","/* global window, XMLHttpRequest */\n\nimport AbstractFileManager from '../less/environment/abstract-file-manager.js';\n\nexport default (options, logger) => {\n\n let fileCache = {};\n\n // TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load\n const FileManager = () => {\n };\n\n FileManager.prototype = new AbstractFileManager();\n\n FileManager.prototype.alwaysMakePathsAbsolute = function alwaysMakePathsAbsolute() {\n return true;\n };\n FileManager.prototype.join = function join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return this.extractUrlParts(laterPath, basePath).path;\n };\n FileManager.prototype.doXHR = function doXHR(url, type, callback, errback) {\n\n const xhr = new XMLHttpRequest();\n const async = options.isFileProtocol ? options.fileAsync : true;\n\n if (typeof xhr.overrideMimeType === 'function') {\n xhr.overrideMimeType('text/css');\n }\n logger.debug(`XHR: Getting '${url}'`);\n xhr.open('GET', url, async);\n xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');\n xhr.send(null);\n\n function handleResponse(xhr, callback, errback) {\n if (xhr.status >= 200 && xhr.status < 300) {\n callback(xhr.responseText,\n xhr.getResponseHeader('Last-Modified'));\n } else if (typeof errback === 'function') {\n errback(xhr.status, url);\n }\n }\n\n if (options.isFileProtocol && !options.fileAsync) {\n if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {\n callback(xhr.responseText);\n } else {\n errback(xhr.status, url);\n }\n } else if (async) {\n xhr.onreadystatechange = () => {\n if (xhr.readyState == 4) {\n handleResponse(xhr, callback, errback);\n }\n };\n } else {\n handleResponse(xhr, callback, errback);\n }\n };\n FileManager.prototype.supports = (filename, currentDirectory, options, environment) => true;\n\n FileManager.prototype.clearFileCache = () => {\n fileCache = {};\n };\n\n FileManager.prototype.loadFile = function loadFile(filename, currentDirectory, options, environment) {\n // TODO: Add prefix support like less-node?\n // What about multiple paths?\n\n if (currentDirectory && !this.isPathAbsolute(filename)) {\n filename = currentDirectory + filename;\n }\n\n filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename;\n\n options = options || {};\n\n // sheet may be set to the stylesheet for the initial load or a collection of properties including\n // some context variables for imports\n const hrefParts = this.extractUrlParts(filename, window.location.href);\n const href = hrefParts.url;\n const self = this;\n \n return new Promise((resolve, reject) => {\n if (options.useFileCache && fileCache[href]) {\n try {\n const lessText = fileCache[href];\n return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }});\n } catch (e) {\n return reject({ filename: href, message: `Error loading file ${href} error was ${e.message}` });\n }\n }\n\n self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) {\n // per file cache\n fileCache[href] = data;\n\n // Use remote copy (re-parse)\n resolve({ contents: data, filename: href, webInfo: { lastModified }});\n }, function doXHRError(status, url) {\n reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href });\n });\n });\n };\n\n return FileManager;\n};\n","// TODO: Add tests for browser @plugin\n/* global window */\n\nimport AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js';\n\n/**\n * Browser Plugin Loader\n */\nclass PluginLoader extends AbstractPluginLoader {\n constructor(less) {\n this.less = less;\n // Should we shim this.require for browser? Probably not?\n }\n\n loadPlugin(filename, basePath, context, environment, fileManager) {\n return new Promise((fulfill, reject) => {\n fileManager.loadFile(filename, basePath, context, environment)\n .then(fulfill).catch(reject);\n });\n }\n}\n\nexport default PluginLoader;\n\n","import * as utils from './utils';\nimport browser from './browser';\n\nexport default (window, less, options) => {\n\n function errorHTML(e, rootHref) {\n const id = `less-error-message:${utils.extractId(rootHref || '')}`;\n const template = '
      • {content}
        • ';\n const elem = window.document.createElement('div');\n let timer;\n let content;\n const errors = [];\n const filename = e.filename || rootHref;\n const filenameNoPath = filename.match(/([^\\/]+(\\?.*)?)$/)[1];\n\n elem.id = id;\n elem.className = 'less-error-message';\n\n content = `

        ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}

        in ${filenameNoPath} `;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += `on line ${e.line}, column ${e.column + 1}:

          ${errors.join('')}
        `;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `
        Stack Trace
        ${e.stack.split('\\n').slice(1).join('
        ')}`;\n }\n elem.innerHTML = content;\n\n // CSS for error messages\n browser.createCSS(window.document, [\n '.less-error-message ul, .less-error-message li {',\n 'list-style-type: none;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message label {',\n 'font-size: 12px;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'color: #cc7777;',\n '}',\n '.less-error-message pre {',\n 'color: #dd6666;',\n 'padding: 4px 0;',\n 'margin: 0;',\n 'display: inline-block;',\n '}',\n '.less-error-message pre.line {',\n 'color: #ff0000;',\n '}',\n '.less-error-message h3 {',\n 'font-size: 20px;',\n 'font-weight: bold;',\n 'padding: 15px 0 5px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message a {',\n 'color: #10a',\n '}',\n '.less-error-message .error {',\n 'color: red;',\n 'font-weight: bold;',\n 'padding-bottom: 2px;',\n 'border-bottom: 1px dashed red;',\n '}'\n ].join('\\n'), { title: 'error-message' });\n\n elem.style.cssText = [\n 'font-family: Arial, sans-serif',\n 'border: 1px solid #e00',\n 'background-color: #eee',\n 'border-radius: 5px',\n '-webkit-border-radius: 5px',\n '-moz-border-radius: 5px',\n 'color: #e00',\n 'padding: 15px',\n 'margin-bottom: 15px'\n ].join(';');\n\n if (options.env === 'development') {\n timer = setInterval(() => {\n const document = window.document;\n const body = document.body;\n if (body) {\n if (document.getElementById(id)) {\n body.replaceChild(elem, document.getElementById(id));\n } else {\n body.insertBefore(elem, body.firstChild);\n }\n clearInterval(timer);\n }\n }, 10);\n }\n }\n\n function removeErrorHTML(path) {\n const node = window.document.getElementById(`less-error-message:${utils.extractId(path)}`);\n if (node) {\n node.parentNode.removeChild(node);\n }\n }\n\n function removeErrorConsole(path) {\n // no action\n }\n\n function removeError(path) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n removeErrorHTML(path);\n } else if (options.errorReporting === 'console') {\n removeErrorConsole(path);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('remove', path);\n }\n }\n\n function errorConsole(e, rootHref) {\n const template = '{line} {content}';\n const filename = e.filename || rootHref;\n const errors = [];\n let content = `${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'} in ${filename}`;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += ` on line ${e.line}, column ${e.column + 1}:\\n${errors.join('\\n')}`;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `\\nStack Trace\\n${e.stack}`;\n }\n less.logger.error(content);\n }\n\n function error(e, rootHref) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n errorHTML(e, rootHref);\n } else if (options.errorReporting === 'console') {\n errorConsole(e, rootHref);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('add', e, rootHref);\n }\n }\n\n return {\n add: error,\n remove: removeError\n };\n};\n","/**\n * Kicks off less and compiles any stylesheets\n * used in the browser distributed version of less\n * to kick-start less using the browser api\n */\n/* global window, document */\n\nimport defaultOptions from '../less/default-options';\nimport addDefaultOptions from './add-default-options';\nimport root from './index';\n\nconst options = defaultOptions();\n\nif (window.less) {\n for (const key in window.less) {\n if (window.less.hasOwnProperty(key)) {\n options[key] = window.less[key];\n }\n }\n}\naddDefaultOptions(window, options);\n\noptions.plugins = options.plugins || [];\n\nif (window.LESS_PLUGINS) {\n options.plugins = options.plugins.concat(window.LESS_PLUGINS);\n}\n\nconst less = root(window, options);\nexport default less;\n\nwindow.less = less;\n\nlet css;\nlet head;\nlet style;\n\n// Always restore page visibility\nfunction resolveOrReject(data) {\n if (data.filename) {\n console.warn(data);\n }\n if (!options.async) {\n head.removeChild(style);\n }\n}\n\nif (options.onReady) {\n if (/!watch/.test(window.location.hash)) {\n less.watch();\n }\n // Simulate synchronous stylesheet loading by hiding page rendering\n if (!options.async) {\n css = 'body { display: none !important }';\n head = document.head || document.getElementsByTagName('head')[0];\n style = document.createElement('style');\n\n style.type = 'text/css';\n if (style.styleSheet) {\n style.styleSheet.cssText = css;\n } else {\n style.appendChild(document.createTextNode(css));\n }\n\n head.appendChild(style);\n }\n less.registerStylesheetsImmediately();\n less.pageLoadFinished = less.refresh(less.env === 'development').then(resolveOrReject, resolveOrReject);\n}\n","// Export a new default each time\nexport default () => ({\n /* Inline Javascript - @plugin still allowed */\n javascriptEnabled: false,\n\n /* Outputs a makefile import dependency list to stdout. */\n depends: false,\n\n /* (DEPRECATED) Compress using less built-in compression. \n * This does an okay job but does not utilise all the tricks of \n * dedicated css compression. */\n compress: false,\n\n /* Runs the less parser and just reports errors without any output. */\n lint: false,\n\n /* Sets available include paths.\n * If the file in an @import rule does not exist at that exact location, \n * less will look for it at the location(s) passed to this option. \n * You might use this for instance to specify a path to a library which \n * you want to be referenced simply and relatively in the less files. */\n paths: [],\n\n /* color output in the terminal */\n color: true,\n\n /* The strictImports controls whether the compiler will allow an @import inside of either \n * @media blocks or (a later addition) other selector blocks.\n * See: https://github.com/less/less.js/issues/656 */\n strictImports: false,\n\n /* Allow Imports from Insecure HTTPS Hosts */\n insecure: false,\n\n /* Allows you to add a path to every generated import and url in your css. \n * This does not affect less import statements that are processed, just ones \n * that are left in the output css. */\n rootpath: '',\n\n /* By default URLs are kept as-is, so if you import a file in a sub-directory \n * that references an image, exactly the same URL will be output in the css. \n * This option allows you to re-write URL's in imported files so that the \n * URL is always relative to the base imported file */\n rewriteUrls: false,\n\n /* Compatibility with IE8. Used for limiting data-uri length */\n // true until 3.0\n ieCompat: false,\n\n /* How to process math \n * 0 always - eagerly try to solve all operations\n * 1 parens-division - require parens for division \"/\"\n * 2 parens | strict - require parens for all operations\n * 3 strict-legacy - legacy strict behavior (super-strict)\n */\n math: 0,\n\n /* Without this option, less attempts to guess at the output unit when it does maths. */\n strictUnits: false,\n\n /* Effectively the declaration is put at the top of your base Less file, \n * meaning it can be used but it also can be overridden if this variable \n * is defined in the file. */\n globalVars: null,\n\n /* As opposed to the global variable option, this puts the declaration at the\n * end of your base file, meaning it will override anything defined in your Less file. */\n modifyVars: null,\n\n /* This option allows you to specify a argument to go on to every URL. */\n urlArgs: ''\n});","import {addDataAttr} from './utils';\nimport browser from './browser';\n\nexport default (window, options) => {\n\n // use options from the current script tag data attribues\n addDataAttr(options, browser.currentScript(window));\n\n if (options.isFileProtocol === undefined) {\n options.isFileProtocol = /^(file|(chrome|safari)(-extension)?|resource|qrc|app):/.test(window.location.protocol);\n }\n\n // Load styles asynchronously (default: false)\n //\n // This is set to `false` by default, so that the body\n // doesn't start loading before the stylesheets are parsed.\n // Setting this to `true` can result in flickering.\n //\n options.async = options.async || false;\n options.fileAsync = options.fileAsync || false;\n\n // Interval between watch polls\n options.poll = options.poll || (options.isFileProtocol ? 1000 : 1500);\n\n options.env = options.env || (window.location.hostname == '127.0.0.1' ||\n window.location.hostname == '0.0.0.0' ||\n window.location.hostname == 'localhost' ||\n (window.location.port &&\n window.location.port.length > 0) ||\n options.isFileProtocol ? 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\ No newline at end of file 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function extractId(href) {\n return href.replace(/^[a-z-]+:\\/+?[^\\/]+/, '') // Remove protocol & domain\n .replace(/[\\?\\&]livereload=\\w+/, '') // Remove LiveReload cachebuster\n .replace(/^\\//, '') // Remove root /\n .replace(/\\.[a-zA-Z]+$/, '') // Remove simple extension\n .replace(/[^\\.\\w-]+/g, '-') // Replace illegal characters\n .replace(/\\./g, ':'); // Replace dots with colons(for valid id)\n}\n\nexport function addDataAttr(options, tag) {\n for (const opt in tag.dataset) {\n if (tag.dataset.hasOwnProperty(opt)) {\n if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') {\n options[opt] = tag.dataset[opt];\n } else {\n try {\n options[opt] = JSON.parse(tag.dataset[opt]);\n }\n catch (_) {}\n }\n }\n }\n}\n","import * as utils from './utils';\n\nexport default {\n createCSS: function (document, styles, sheet) {\n // Strip the query-string\n const href = sheet.href || '';\n\n // If there is no title set, use the filename, minus the extension\n const id = `less:${sheet.title || utils.extractId(href)}`;\n\n // If this has already been inserted into the DOM, we may need to replace it\n const oldStyleNode = document.getElementById(id);\n let keepOldStyleNode = false;\n\n // Create a new stylesheet node for insertion or (if necessary) replacement\n const styleNode = document.createElement('style');\n styleNode.setAttribute('type', 'text/css');\n if (sheet.media) {\n styleNode.setAttribute('media', sheet.media);\n }\n styleNode.id = id;\n\n if (!styleNode.styleSheet) {\n styleNode.appendChild(document.createTextNode(styles));\n\n // If new contents match contents of oldStyleNode, don't replace oldStyleNode\n keepOldStyleNode = (oldStyleNode !== null && oldStyleNode.childNodes.length > 0 && styleNode.childNodes.length > 0 &&\n oldStyleNode.firstChild.nodeValue === styleNode.firstChild.nodeValue);\n }\n\n const head = document.getElementsByTagName('head')[0];\n\n // If there is no oldStyleNode, just append; otherwise, only append if we need\n // to replace oldStyleNode with an updated stylesheet\n if (oldStyleNode === null || keepOldStyleNode === false) {\n const nextEl = sheet && sheet.nextSibling || null;\n if (nextEl) {\n nextEl.parentNode.insertBefore(styleNode, nextEl);\n } else {\n head.appendChild(styleNode);\n }\n }\n if (oldStyleNode && keepOldStyleNode === false) {\n oldStyleNode.parentNode.removeChild(oldStyleNode);\n }\n\n // For IE.\n // This needs to happen *after* the style element is added to the DOM, otherwise IE 7 and 8 may crash.\n // See http://social.msdn.microsoft.com/Forums/en-US/7e081b65-878a-4c22-8e68-c10d39c2ed32/internet-explorer-crashes-appending-style-element-to-head\n if (styleNode.styleSheet) {\n try {\n styleNode.styleSheet.cssText = styles;\n } catch (e) {\n throw new Error('Couldn\\'t reassign styleSheet.cssText.');\n }\n }\n },\n currentScript: function(window) {\n const document = window.document;\n return document.currentScript || (() => {\n const scripts = document.getElementsByTagName('script');\n return scripts[scripts.length - 1];\n })();\n }\n};\n","export default {\n 'aliceblue':'#f0f8ff',\n 'antiquewhite':'#faebd7',\n 'aqua':'#00ffff',\n 'aquamarine':'#7fffd4',\n 'azure':'#f0ffff',\n 'beige':'#f5f5dc',\n 'bisque':'#ffe4c4',\n 'black':'#000000',\n 'blanchedalmond':'#ffebcd',\n 'blue':'#0000ff',\n 'blueviolet':'#8a2be2',\n 'brown':'#a52a2a',\n 'burlywood':'#deb887',\n 'cadetblue':'#5f9ea0',\n 'chartreuse':'#7fff00',\n 'chocolate':'#d2691e',\n 'coral':'#ff7f50',\n 'cornflowerblue':'#6495ed',\n 'cornsilk':'#fff8dc',\n 'crimson':'#dc143c',\n 'cyan':'#00ffff',\n 'darkblue':'#00008b',\n 'darkcyan':'#008b8b',\n 'darkgoldenrod':'#b8860b',\n 'darkgray':'#a9a9a9',\n 'darkgrey':'#a9a9a9',\n 'darkgreen':'#006400',\n 'darkkhaki':'#bdb76b',\n 'darkmagenta':'#8b008b',\n 'darkolivegreen':'#556b2f',\n 'darkorange':'#ff8c00',\n 'darkorchid':'#9932cc',\n 'darkred':'#8b0000',\n 'darksalmon':'#e9967a',\n 'darkseagreen':'#8fbc8f',\n 'darkslateblue':'#483d8b',\n 'darkslategray':'#2f4f4f',\n 'darkslategrey':'#2f4f4f',\n 'darkturquoise':'#00ced1',\n 'darkviolet':'#9400d3',\n 'deeppink':'#ff1493',\n 'deepskyblue':'#00bfff',\n 'dimgray':'#696969',\n 'dimgrey':'#696969',\n 'dodgerblue':'#1e90ff',\n 'firebrick':'#b22222',\n 'floralwhite':'#fffaf0',\n 'forestgreen':'#228b22',\n 'fuchsia':'#ff00ff',\n 'gainsboro':'#dcdcdc',\n 'ghostwhite':'#f8f8ff',\n 'gold':'#ffd700',\n 'goldenrod':'#daa520',\n 'gray':'#808080',\n 'grey':'#808080',\n 'green':'#008000',\n 'greenyellow':'#adff2f',\n 'honeydew':'#f0fff0',\n 'hotpink':'#ff69b4',\n 'indianred':'#cd5c5c',\n 'indigo':'#4b0082',\n 'ivory':'#fffff0',\n 'khaki':'#f0e68c',\n 'lavender':'#e6e6fa',\n 'lavenderblush':'#fff0f5',\n 'lawngreen':'#7cfc00',\n 'lemonchiffon':'#fffacd',\n 'lightblue':'#add8e6',\n 'lightcoral':'#f08080',\n 'lightcyan':'#e0ffff',\n 'lightgoldenrodyellow':'#fafad2',\n 'lightgray':'#d3d3d3',\n 'lightgrey':'#d3d3d3',\n 'lightgreen':'#90ee90',\n 'lightpink':'#ffb6c1',\n 'lightsalmon':'#ffa07a',\n 'lightseagreen':'#20b2aa',\n 'lightskyblue':'#87cefa',\n 'lightslategray':'#778899',\n 'lightslategrey':'#778899',\n 'lightsteelblue':'#b0c4de',\n 'lightyellow':'#ffffe0',\n 'lime':'#00ff00',\n 'limegreen':'#32cd32',\n 'linen':'#faf0e6',\n 'magenta':'#ff00ff',\n 'maroon':'#800000',\n 'mediumaquamarine':'#66cdaa',\n 'mediumblue':'#0000cd',\n 'mediumorchid':'#ba55d3',\n 'mediumpurple':'#9370d8',\n 'mediumseagreen':'#3cb371',\n 'mediumslateblue':'#7b68ee',\n 'mediumspringgreen':'#00fa9a',\n 'mediumturquoise':'#48d1cc',\n 'mediumvioletred':'#c71585',\n 'midnightblue':'#191970',\n 'mintcream':'#f5fffa',\n 'mistyrose':'#ffe4e1',\n 'moccasin':'#ffe4b5',\n 'navajowhite':'#ffdead',\n 'navy':'#000080',\n 'oldlace':'#fdf5e6',\n 'olive':'#808000',\n 'olivedrab':'#6b8e23',\n 'orange':'#ffa500',\n 'orangered':'#ff4500',\n 'orchid':'#da70d6',\n 'palegoldenrod':'#eee8aa',\n 'palegreen':'#98fb98',\n 'paleturquoise':'#afeeee',\n 'palevioletred':'#d87093',\n 'papayawhip':'#ffefd5',\n 'peachpuff':'#ffdab9',\n 'peru':'#cd853f',\n 'pink':'#ffc0cb',\n 'plum':'#dda0dd',\n 'powderblue':'#b0e0e6',\n 'purple':'#800080',\n 'rebeccapurple':'#663399',\n 'red':'#ff0000',\n 'rosybrown':'#bc8f8f',\n 'royalblue':'#4169e1',\n 'saddlebrown':'#8b4513',\n 'salmon':'#fa8072',\n 'sandybrown':'#f4a460',\n 'seagreen':'#2e8b57',\n 'seashell':'#fff5ee',\n 'sienna':'#a0522d',\n 'silver':'#c0c0c0',\n 'skyblue':'#87ceeb',\n 'slateblue':'#6a5acd',\n 'slategray':'#708090',\n 'slategrey':'#708090',\n 'snow':'#fffafa',\n 'springgreen':'#00ff7f',\n 'steelblue':'#4682b4',\n 'tan':'#d2b48c',\n 'teal':'#008080',\n 'thistle':'#d8bfd8',\n 'tomato':'#ff6347',\n 'turquoise':'#40e0d0',\n 'violet':'#ee82ee',\n 'wheat':'#f5deb3',\n 'white':'#ffffff',\n 'whitesmoke':'#f5f5f5',\n 'yellow':'#ffff00',\n 'yellowgreen':'#9acd32'\n};","export default {\n length: {\n 'm': 1,\n 'cm': 0.01,\n 'mm': 0.001,\n 'in': 0.0254,\n 'px': 0.0254 / 96,\n 'pt': 0.0254 / 72,\n 'pc': 0.0254 / 72 * 12\n },\n duration: {\n 's': 1,\n 'ms': 0.001\n },\n angle: {\n 'rad': 1 / (2 * Math.PI),\n 'deg': 1 / 360,\n 'grad': 1 / 400,\n 'turn': 1\n }\n};","import colors from './colors';\nimport unitConversions from './unit-conversions';\n\nexport default { colors, unitConversions };\n","class Node {\n constructor() {\n this.parent = null;\n this.visibilityBlocks = undefined;\n this.nodeVisible = undefined;\n this.rootNode = null;\n this.parsed = null;\n\n const self = this;\n Object.defineProperty(this, 'currentFileInfo', {\n get: function() { return self.fileInfo(); }\n });\n Object.defineProperty(this, 'index', {\n get: function() { return self.getIndex(); }\n });\n\n }\n\n setParent(nodes, parent) {\n function set(node) {\n if (node && node instanceof Node) {\n node.parent = parent;\n }\n }\n if (Array.isArray(nodes)) {\n nodes.forEach(set);\n }\n else {\n set(nodes);\n }\n }\n\n getIndex() {\n return this._index || (this.parent && this.parent.getIndex()) || 0;\n }\n\n fileInfo() {\n return this._fileInfo || (this.parent && this.parent.fileInfo()) || {};\n }\n\n isRulesetLike() {\n return false;\n }\n\n toCSS(context) {\n const strs = [];\n this.genCSS(context, {\n add: function(chunk, fileInfo, index) {\n strs.push(chunk);\n },\n isEmpty: function () {\n return strs.length === 0;\n }\n });\n return strs.join('');\n }\n\n genCSS(context, output) {\n output.add(this.value);\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval() { return this; }\n\n _operate(context, op, a, b) {\n switch (op) {\n case '+': return a + b;\n case '-': return a - b;\n case '*': return a * b;\n case '/': return a / b;\n }\n }\n\n fround(context, value) {\n const precision = context && context.numPrecision;\n // add \"epsilon\" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded:\n return (precision) ? Number((value + 2e-16).toFixed(precision)) : value;\n }\n\n // Returns true if this node represents root of ast imported by reference\n blocksVisibility() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n return this.visibilityBlocks !== 0;\n }\n\n addVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks + 1;\n }\n\n removeVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks - 1;\n }\n\n // Turns on node visibility - if called node will be shown in output regardless\n // of whether it comes from import by reference or not\n ensureVisibility() {\n this.nodeVisible = true;\n }\n\n // Turns off node visibility - if called node will NOT be shown in output regardless\n // of whether it comes from import by reference or not\n ensureInvisibility() {\n this.nodeVisible = false;\n }\n\n // return values:\n // false - the node must not be visible\n // true - the node must be visible\n // undefined or null - the node has the same visibility as its parent\n isVisible() {\n return this.nodeVisible;\n }\n\n visibilityInfo() {\n return {\n visibilityBlocks: this.visibilityBlocks,\n nodeVisible: this.nodeVisible\n };\n }\n\n copyVisibilityInfo(info) {\n if (!info) {\n return;\n }\n this.visibilityBlocks = info.visibilityBlocks;\n this.nodeVisible = info.nodeVisible;\n }\n}\n\nNode.compare = (a, b) => {\n /* returns:\n -1: a < b\n 0: a = b\n 1: a > b\n and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */\n\n if ((a.compare) &&\n // for \"symmetric results\" force toCSS-based comparison\n // of Quoted or Anonymous if either value is one of those\n !(b.type === 'Quoted' || b.type === 'Anonymous')) {\n return a.compare(b);\n } else if (b.compare) {\n return -b.compare(a);\n } else if (a.type !== b.type) {\n return undefined;\n }\n\n a = a.value;\n b = b.value;\n if (!Array.isArray(a)) {\n return a === b ? 0 : undefined;\n }\n if (a.length !== b.length) {\n return undefined;\n }\n for (let i = 0; i < a.length; i++) {\n if (Node.compare(a[i], b[i]) !== 0) {\n return undefined;\n }\n }\n return 0;\n};\n\nNode.numericCompare = (a, b) => a < b ? -1\n : a === b ? 0\n : a > b ? 1 : undefined;\nexport default Node;\n","import Node from './node';\nimport colors from '../data/colors';\n\n//\n// RGB Colors - #ff0014, #eee\n//\nclass Color extends Node {\n constructor(rgb, a, originalForm) {\n super();\n\n const self = this;\n //\n // The end goal here, is to parse the arguments\n // into an integer triplet, such as `128, 255, 0`\n //\n // This facilitates operations and conversions.\n //\n if (Array.isArray(rgb)) {\n this.rgb = rgb;\n } else if (rgb.length >= 6) {\n this.rgb = [];\n rgb.match(/.{2}/g).map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c, 16));\n } else {\n self.alpha = (parseInt(c, 16)) / 255;\n }\n });\n } else {\n this.rgb = [];\n rgb.split('').map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c + c, 16));\n } else {\n self.alpha = (parseInt(c + c, 16)) / 255;\n }\n });\n }\n this.alpha = this.alpha || (typeof a === 'number' ? a : 1);\n if (typeof originalForm !== 'undefined') {\n this.value = originalForm;\n }\n }\n\n luma() {\n let r = this.rgb[0] / 255;\n let g = this.rgb[1] / 255;\n let b = this.rgb[2] / 255;\n\n r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4);\n g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4);\n b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4);\n\n return 0.2126 * r + 0.7152 * g + 0.0722 * b;\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context, doNotCompress) {\n const compress = context && context.compress && !doNotCompress;\n let color;\n let alpha;\n let colorFunction;\n let args = [];\n\n // `value` is set if this color was originally\n // converted from a named color string so we need\n // to respect this and try to output named color too.\n alpha = this.fround(context, this.alpha);\n\n if (this.value) {\n if (this.value.indexOf('rgb') === 0) {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n } else if (this.value.indexOf('hsl') === 0) {\n if (alpha < 1) {\n colorFunction = 'hsla';\n } else {\n colorFunction = 'hsl';\n }\n } else {\n return this.value;\n }\n } else {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n }\n\n switch (colorFunction) {\n case 'rgba':\n args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1));\n break;\n case 'hsla':\n args.push(clamp(alpha, 1));\n case 'hsl':\n color = this.toHSL();\n args = [\n this.fround(context, color.h),\n `${this.fround(context, color.s * 100)}%`,\n `${this.fround(context, color.l * 100)}%`\n ].concat(args);\n }\n\n if (colorFunction) {\n // Values are capped between `0` and `255`, rounded and zero-padded.\n return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`;\n }\n\n color = this.toRGB();\n\n if (compress) {\n const splitcolor = color.split('');\n\n // Convert color to short format\n if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) {\n color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`;\n }\n }\n\n return color;\n }\n\n //\n // Operations have to be done per-channel, if not,\n // channels will spill onto each other. Once we have\n // our result, in the form of an integer triplet,\n // we create a new Color node to hold the result.\n //\n operate(context, op, other) {\n const rgb = new Array(3);\n const alpha = this.alpha * (1 - other.alpha) + other.alpha;\n for (let c = 0; c < 3; c++) {\n rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]);\n }\n return new Color(rgb, alpha);\n }\n\n toRGB() {\n return toHex(this.rgb);\n }\n\n toHSL() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const l = (max + min) / 2;\n const d = max - min;\n\n if (max === min) {\n h = s = 0;\n } else {\n s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, l, a };\n }\n\n // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript\n toHSV() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const v = max;\n\n const d = max - min;\n if (max === 0) {\n s = 0;\n } else {\n s = d / max;\n }\n\n if (max === min) {\n h = 0;\n } else {\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, v, a };\n }\n\n toARGB() {\n return toHex([this.alpha * 255].concat(this.rgb));\n }\n\n compare(x) {\n return (x.rgb &&\n x.rgb[0] === this.rgb[0] &&\n x.rgb[1] === this.rgb[1] &&\n x.rgb[2] === this.rgb[2] &&\n x.alpha === this.alpha) ? 0 : undefined;\n }\n}\n\nColor.prototype.type = 'Color';\n\nfunction clamp(v, max) {\n return Math.min(Math.max(v, 0), max);\n}\n\nfunction toHex(v) {\n return `#${v.map(c => {\n c = clamp(Math.round(c), 255);\n return (c < 16 ? '0' : '') + c.toString(16);\n }).join('')}`;\n}\n\nColor.fromKeyword = keyword => {\n let c;\n const key = keyword.toLowerCase();\n if (colors.hasOwnProperty(key)) {\n c = new Color(colors[key].slice(1));\n }\n else if (key === 'transparent') {\n c = new Color([0, 0, 0], 0);\n }\n\n if (c) {\n c.value = keyword;\n return c;\n }\n};\nexport default Color;\n","import Node from './node';\n\nclass Paren extends Node {\n constructor(node) {\n super();\n\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n return new Paren(this.value.eval(context));\n }\n}\n\nParen.prototype.type = 'Paren';\nexport default Paren;\n","import Node from './node';\nconst _noSpaceCombinators = {\n '': true,\n ' ': true,\n '|': true\n};\n\nclass Combinator extends Node {\n constructor(value) {\n super();\n\n if (value === ' ') {\n this.value = ' ';\n this.emptyOrWhitespace = true;\n } else {\n this.value = value ? value.trim() : '';\n this.emptyOrWhitespace = this.value === '';\n }\n }\n\n genCSS(context, output) {\n const spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' ';\n output.add(spaceOrEmpty + this.value + spaceOrEmpty);\n }\n}\n\nCombinator.prototype.type = 'Combinator';\n\nexport default Combinator;\n","import Node from './node';\nimport Paren from './paren';\nimport Combinator from './combinator';\n\nclass Element extends Node {\n constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.combinator = combinator instanceof Combinator ?\n combinator : new Combinator(combinator);\n\n if (typeof value === 'string') {\n this.value = value.trim();\n } else if (value) {\n this.value = value;\n } else {\n this.value = '';\n }\n this.isVariable = isVariable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.combinator, this);\n }\n\n accept(visitor) {\n const value = this.value;\n this.combinator = visitor.visit(this.combinator);\n if (typeof value === 'object') {\n this.value = visitor.visit(value);\n }\n }\n\n eval(context) {\n return new Element(this.combinator,\n this.value.eval ? this.value.eval(context) : this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n clone() {\n return new Element(this.combinator,\n this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context), this.fileInfo(), this.getIndex());\n }\n\n toCSS(context = {}) {\n let value = this.value;\n const firstSelector = context.firstSelector;\n if (value instanceof Paren) {\n // selector in parens should not be affected by outer selector\n // flags (breaks only interpolated selectors - see #1973)\n context.firstSelector = true;\n }\n value = value.toCSS ? value.toCSS(context) : value;\n context.firstSelector = firstSelector;\n if (value === '' && this.combinator.value.charAt(0) === '&') {\n return '';\n } else {\n return this.combinator.toCSS(context) + value;\n }\n }\n}\n\nElement.prototype.type = 'Element';\nexport default Element;\n","\nexport const Math = {\n ALWAYS: 0,\n PARENS_DIVISION: 1,\n PARENS: 2,\n STRICT_LEGACY: 3\n};\n\nexport const RewriteUrls = {\n OFF: 0,\n LOCAL: 1,\n ALL: 2\n};","var clone = (function() {\n'use strict';\n\nfunction _instanceof(obj, type) {\n return type != null && obj instanceof type;\n}\n\nvar nativeMap;\ntry {\n nativeMap = Map;\n} catch(_) {\n // maybe a reference error because no `Map`. Give it a dummy value that no\n // value will ever be an instanceof.\n nativeMap = function() {};\n}\n\nvar nativeSet;\ntry {\n nativeSet = Set;\n} catch(_) {\n nativeSet = function() {};\n}\n\nvar nativePromise;\ntry {\n nativePromise = Promise;\n} catch(_) {\n nativePromise = function() {};\n}\n\n/**\n * Clones (copies) an Object using deep copying.\n *\n * This function supports circular references by default, but if you are certain\n * there are no circular references in your object, you can save some CPU time\n * by calling clone(obj, false).\n *\n * Caution: if `circular` is false and `parent` contains circular references,\n * your program may enter an infinite loop and crash.\n *\n * @param `parent` - the object to be cloned\n * @param `circular` - set to true if the object to be cloned may contain\n * circular references. (optional - true by default)\n * @param `depth` - set to a number if the object is only to be cloned to\n * a particular depth. (optional - defaults to Infinity)\n * @param `prototype` - sets the prototype to be used when cloning an object.\n * (optional - defaults to parent prototype).\n * @param `includeNonEnumerable` - set to true if the non-enumerable properties\n * should be cloned as well. Non-enumerable properties on the prototype\n * chain will be ignored. (optional - false by default)\n*/\nfunction clone(parent, circular, depth, prototype, includeNonEnumerable) {\n if (typeof circular === 'object') {\n depth = circular.depth;\n prototype = circular.prototype;\n includeNonEnumerable = circular.includeNonEnumerable;\n circular = circular.circular;\n }\n // maintain two arrays for circular references, where corresponding parents\n // and children have the same index\n var allParents = [];\n var allChildren = [];\n\n var useBuffer = typeof Buffer != 'undefined';\n\n if (typeof circular == 'undefined')\n circular = true;\n\n if (typeof depth == 'undefined')\n depth = Infinity;\n\n // recurse this function so we don't reset allParents and allChildren\n function _clone(parent, depth) {\n // cloning null always returns null\n if (parent === null)\n return null;\n\n if (depth === 0)\n return parent;\n\n var child;\n var proto;\n if (typeof parent != 'object') {\n return parent;\n }\n\n if (_instanceof(parent, nativeMap)) {\n child = new nativeMap();\n } else if (_instanceof(parent, nativeSet)) {\n child = new nativeSet();\n } else if (_instanceof(parent, nativePromise)) {\n child = new nativePromise(function (resolve, reject) {\n parent.then(function(value) {\n resolve(_clone(value, depth - 1));\n }, function(err) {\n reject(_clone(err, depth - 1));\n });\n });\n } else if (clone.__isArray(parent)) {\n child = [];\n } else if (clone.__isRegExp(parent)) {\n child = new RegExp(parent.source, __getRegExpFlags(parent));\n if (parent.lastIndex) child.lastIndex = parent.lastIndex;\n } else if (clone.__isDate(parent)) {\n child = new Date(parent.getTime());\n } else if (useBuffer && Buffer.isBuffer(parent)) {\n if (Buffer.allocUnsafe) {\n // Node.js >= 4.5.0\n child = Buffer.allocUnsafe(parent.length);\n } else {\n // Older Node.js versions\n child = new Buffer(parent.length);\n }\n parent.copy(child);\n return child;\n } else if (_instanceof(parent, Error)) {\n child = Object.create(parent);\n } else {\n if (typeof prototype == 'undefined') {\n proto = Object.getPrototypeOf(parent);\n child = Object.create(proto);\n }\n else {\n child = Object.create(prototype);\n proto = prototype;\n }\n }\n\n if (circular) {\n var index = allParents.indexOf(parent);\n\n if (index != -1) {\n return allChildren[index];\n }\n allParents.push(parent);\n allChildren.push(child);\n }\n\n if (_instanceof(parent, nativeMap)) {\n parent.forEach(function(value, key) {\n var keyChild = _clone(key, depth - 1);\n var valueChild = _clone(value, depth - 1);\n child.set(keyChild, valueChild);\n });\n }\n if (_instanceof(parent, nativeSet)) {\n parent.forEach(function(value) {\n var entryChild = _clone(value, depth - 1);\n child.add(entryChild);\n });\n }\n\n for (var i in parent) {\n var attrs;\n if (proto) {\n attrs = Object.getOwnPropertyDescriptor(proto, i);\n }\n\n if (attrs && attrs.set == null) {\n continue;\n }\n child[i] = _clone(parent[i], depth - 1);\n }\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(parent);\n for (var i = 0; i < symbols.length; i++) {\n // Don't need to worry about cloning a symbol because it is a primitive,\n // like a number or string.\n var symbol = symbols[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, symbol);\n if (descriptor && !descriptor.enumerable && !includeNonEnumerable) {\n continue;\n }\n child[symbol] = _clone(parent[symbol], depth - 1);\n if (!descriptor.enumerable) {\n Object.defineProperty(child, symbol, {\n enumerable: false\n });\n }\n }\n }\n\n if (includeNonEnumerable) {\n var allPropertyNames = Object.getOwnPropertyNames(parent);\n for (var i = 0; i < allPropertyNames.length; i++) {\n var propertyName = allPropertyNames[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, propertyName);\n if (descriptor && descriptor.enumerable) {\n continue;\n }\n child[propertyName] = _clone(parent[propertyName], depth - 1);\n Object.defineProperty(child, propertyName, {\n enumerable: false\n });\n }\n }\n\n return child;\n }\n\n return _clone(parent, depth);\n}\n\n/**\n * Simple flat clone using prototype, accepts only objects, usefull for property\n * override on FLAT configuration object (no nested props).\n *\n * USE WITH CAUTION! This may not behave as you wish if you do not know how this\n * works.\n */\nclone.clonePrototype = function clonePrototype(parent) {\n if (parent === null)\n return null;\n\n var c = function () {};\n c.prototype = parent;\n return new c();\n};\n\n// private utility functions\n\nfunction __objToStr(o) {\n return Object.prototype.toString.call(o);\n}\nclone.__objToStr = __objToStr;\n\nfunction __isDate(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Date]';\n}\nclone.__isDate = __isDate;\n\nfunction __isArray(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Array]';\n}\nclone.__isArray = __isArray;\n\nfunction __isRegExp(o) {\n return typeof o === 'object' && __objToStr(o) === '[object RegExp]';\n}\nclone.__isRegExp = __isRegExp;\n\nfunction __getRegExpFlags(re) {\n var flags = '';\n if (re.global) flags += 'g';\n if (re.ignoreCase) flags += 'i';\n if (re.multiline) flags += 'm';\n return flags;\n}\nclone.__getRegExpFlags = __getRegExpFlags;\n\nreturn clone;\n})();\n\nif (typeof module === 'object' && module.exports) {\n module.exports = clone;\n}\n","/* jshint proto: true */\nimport * as Constants from './constants';\nimport CloneHelper from 'clone';\n\nexport function getLocation(index, inputStream) {\n let n = index + 1;\n let line = null;\n let column = -1;\n\n while (--n >= 0 && inputStream.charAt(n) !== '\\n') {\n column++;\n }\n\n if (typeof index === 'number') {\n line = (inputStream.slice(0, index).match(/\\n/g) || '').length;\n }\n\n return {\n line,\n column\n };\n}\n\nexport function copyArray(arr) {\n let i;\n const length = arr.length;\n const copy = new Array(length);\n\n for (i = 0; i < length; i++) {\n copy[i] = arr[i];\n }\n return copy;\n}\n\nexport function clone(obj) {\n const cloned = {};\n for (const prop in obj) {\n if (obj.hasOwnProperty(prop)) {\n cloned[prop] = obj[prop];\n }\n }\n return cloned;\n}\n\nexport function defaults(obj1, obj2) {\n let newObj = obj2 || {};\n if (!obj2._defaults) {\n newObj = {};\n const defaults = CloneHelper(obj1);\n newObj._defaults = defaults;\n const cloned = obj2 ? CloneHelper(obj2) : {};\n Object.assign(newObj, defaults, cloned);\n }\n return newObj;\n}\n\nexport function copyOptions(obj1, obj2) {\n if (obj2 && obj2._defaults) {\n return obj2;\n }\n const opts = defaults(obj1, obj2);\n if (opts.strictMath) {\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n // Back compat with changed relativeUrls option\n if (opts.relativeUrls) {\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n }\n if (typeof opts.math === 'string') {\n switch (opts.math.toLowerCase()) {\n case 'always':\n opts.math = Constants.Math.ALWAYS;\n break;\n case 'parens-division':\n opts.math = Constants.Math.PARENS_DIVISION;\n break;\n case 'strict':\n case 'parens':\n opts.math = Constants.Math.PARENS;\n break;\n case 'strict-legacy':\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n }\n if (typeof opts.rewriteUrls === 'string') {\n switch (opts.rewriteUrls.toLowerCase()) {\n case 'off':\n opts.rewriteUrls = Constants.RewriteUrls.OFF;\n break;\n case 'local':\n opts.rewriteUrls = Constants.RewriteUrls.LOCAL;\n break;\n case 'all':\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n break;\n }\n }\n return opts;\n}\n\nexport function merge(obj1, obj2) {\n for (const prop in obj2) {\n if (obj2.hasOwnProperty(prop)) {\n obj1[prop] = obj2[prop];\n }\n }\n return obj1;\n}\n\nexport function flattenArray(arr, result = []) {\n for (let i = 0, length = arr.length; i < length; i++) {\n const value = arr[i];\n if (Array.isArray(value)) {\n flattenArray(value, result);\n } else {\n if (value !== undefined) {\n result.push(value);\n }\n }\n }\n return result;\n}","import * as utils from './utils';\n/**\n * This is a centralized class of any error that could be thrown internally (mostly by the parser).\n * Besides standard .message it keeps some additional data like a path to the file where the error\n * occurred along with line and column numbers.\n *\n * @class\n * @extends Error\n * @type {module.LessError}\n *\n * @prop {string} type\n * @prop {string} filename\n * @prop {number} index\n * @prop {number} line\n * @prop {number} column\n * @prop {number} callLine\n * @prop {number} callExtract\n * @prop {string[]} extract\n *\n * @param {Object} e - An error object to wrap around or just a descriptive object\n * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager?\n * @param {string} [currentFilename]\n */\nconst LessError = function LessError(e, fileContentMap, currentFilename) {\n Error.call(this);\n\n const filename = e.filename || currentFilename;\n\n this.message = e.message;\n this.stack = e.stack;\n\n if (fileContentMap && filename) {\n const input = fileContentMap.contents[filename];\n const loc = utils.getLocation(e.index, input);\n const line = loc.line;\n const col = loc.column;\n const callLine = e.call && utils.getLocation(e.call, input).line;\n const lines = input ? input.split('\\n') : '';\n\n this.type = e.type || 'Syntax';\n this.filename = filename;\n this.index = e.index;\n this.line = typeof line === 'number' ? line + 1 : null;\n this.column = col;\n\n if (!this.line && this.stack) {\n const found = this.stack.match(/(|Function):(\\d+):(\\d+)/);\n\n if (found) {\n if (found[2]) {\n this.line = parseInt(found[2]) - 2;\n }\n if (found[3]) {\n this.column = parseInt(found[3]);\n }\n }\n }\n\n this.callLine = callLine + 1;\n this.callExtract = lines[callLine];\n\n this.extract = [\n lines[this.line - 2],\n lines[this.line - 1],\n lines[this.line]\n ];\n }\n\n};\n\nif (typeof Object.create === 'undefined') {\n const F = () => {};\n F.prototype = Error.prototype;\n LessError.prototype = new F();\n} else {\n LessError.prototype = Object.create(Error.prototype);\n}\n\nLessError.prototype.constructor = LessError;\n\n/**\n * An overridden version of the default Object.prototype.toString\n * which uses additional information to create a helpful message.\n *\n * @param {Object} options\n * @returns {string}\n */\nLessError.prototype.toString = function(options = {}) {\n let message = '';\n const extract = this.extract || [];\n let error = [];\n let stylize = str => str;\n if (options.stylize) {\n const type = typeof options.stylize;\n if (type !== 'function') {\n throw Error(`options.stylize should be a function, got a ${type}!`);\n }\n stylize = options.stylize;\n }\n\n if (this.line !== null) {\n if (typeof extract[0] === 'string') {\n error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey'));\n }\n\n if (typeof extract[1] === 'string') {\n let errorTxt = `${this.line} `;\n if (extract[1]) {\n errorTxt += extract[1].slice(0, this.column) +\n stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') +\n extract[1].slice(this.column + 1), 'red'), 'inverse');\n }\n error.push(errorTxt);\n }\n\n if (typeof extract[2] === 'string') {\n error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey'));\n }\n error = `${error.join('\\n') + stylize('', 'reset')}\\n`;\n }\n\n message += stylize(`${this.type}Error: ${this.message}`, 'red');\n if (this.filename) {\n message += stylize(' in ', 'red') + this.filename;\n }\n if (this.line) {\n message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey');\n }\n\n message += `\\n${error}`;\n\n if (this.callLine) {\n message += `${stylize('from ', 'red') + (this.filename || '')}/n`;\n message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`;\n }\n\n return message;\n};\n\nexport default LessError;","import Node from './node';\nimport Element from './element';\nimport LessError from '../less-error';\n\nclass Selector extends Node {\n constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.extendList = extendList;\n this.condition = condition;\n this.evaldCondition = !condition;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.elements = this.getElements(elements);\n this.mixinElements_ = undefined;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.elements, this);\n }\n\n accept(visitor) {\n if (this.elements) {\n this.elements = visitor.visitArray(this.elements);\n }\n if (this.extendList) {\n this.extendList = visitor.visitArray(this.extendList);\n }\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n createDerived(elements, extendList, evaldCondition) {\n elements = this.getElements(elements);\n const newSelector = new Selector(elements, extendList || this.extendList,\n null, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition;\n newSelector.mediaEmpty = this.mediaEmpty;\n return newSelector;\n }\n\n getElements(els) {\n if (!els) {\n return [new Element('', '&', false, this._index, this._fileInfo)];\n }\n if (typeof els === 'string') {\n this.parse.parseNode(\n els, \n ['selector'],\n this._index, \n this._fileInfo, \n function(err, result) {\n if (err) {\n throw new LessError({\n index: err.index,\n message: err.message\n }, this.parse.imports, this._fileInfo.filename);\n }\n els = result[0].elements;\n });\n }\n return els;\n }\n\n createEmptySelectors() {\n const el = new Element('', '&', false, this._index, this._fileInfo);\n const sels = [new Selector([el], null, null, this._index, this._fileInfo)];\n sels[0].mediaEmpty = true;\n return sels;\n }\n\n match(other) {\n const elements = this.elements;\n const len = elements.length;\n let olen;\n let i;\n\n other = other.mixinElements();\n olen = other.length;\n if (olen === 0 || len < olen) {\n return 0;\n } else {\n for (i = 0; i < olen; i++) {\n if (elements[i].value !== other[i]) {\n return 0;\n }\n }\n }\n\n return olen; // return number of matched elements\n }\n\n mixinElements() {\n if (this.mixinElements_) {\n return this.mixinElements_;\n }\n\n let elements = this.elements.map( v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\\*\\.\\w-]([\\w-]|(\\\\.))*/g);\n\n if (elements) {\n if (elements[0] === '&') {\n elements.shift();\n }\n } else {\n elements = [];\n }\n\n return (this.mixinElements_ = elements);\n }\n\n isJustParentSelector() {\n return !this.mediaEmpty &&\n this.elements.length === 1 &&\n this.elements[0].value === '&' &&\n (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === '');\n }\n\n eval(context) {\n const evaldCondition = this.condition && this.condition.eval(context);\n let elements = this.elements;\n let extendList = this.extendList;\n\n elements = elements && elements.map(e => e.eval(context));\n extendList = extendList && extendList.map(extend => extend.eval(context));\n\n return this.createDerived(elements, extendList, evaldCondition);\n }\n\n genCSS(context, output) {\n let i;\n let element;\n if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') {\n output.add(' ', this.fileInfo(), this.getIndex());\n }\n for (i = 0; i < this.elements.length; i++) {\n element = this.elements[i];\n element.genCSS(context, output);\n }\n }\n\n getIsOutput() {\n return this.evaldCondition;\n }\n}\n\nSelector.prototype.type = 'Selector';\nexport default Selector;\n","import Node from './node';\n\nclass Value extends Node {\n constructor(value) {\n super();\n\n if (!value) {\n throw new Error('Value requires an array argument');\n }\n if (!Array.isArray(value)) {\n this.value = [ value ];\n }\n else {\n this.value = value;\n }\n }\n\n accept(visitor) {\n if (this.value) {\n this.value = visitor.visitArray(this.value);\n }\n }\n\n eval(context) {\n if (this.value.length === 1) {\n return this.value[0].eval(context);\n } else {\n return new Value(this.value.map(v => v.eval(context)));\n }\n }\n\n genCSS(context, output) {\n let i;\n for (i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (i + 1 < this.value.length) {\n output.add((context && context.compress) ? ',' : ', ');\n }\n }\n }\n}\n\nValue.prototype.type = 'Value';\nexport default Value;\n","import Node from './node';\n\nclass Keyword extends Node {\n constructor(value) {\n super();\n\n this.value = value;\n }\n\n genCSS(context, output) {\n if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; }\n output.add(this.value);\n }\n}\n\nKeyword.prototype.type = 'Keyword';\n\nKeyword.True = new Keyword('true');\nKeyword.False = new Keyword('false');\n\nexport default Keyword;\n","import Node from './node';\n\nclass Anonymous extends Node {\n constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) {\n super();\n\n this.value = value;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.mapLines = mapLines;\n this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike;\n this.allowRoot = true;\n this.copyVisibilityInfo(visibilityInfo);\n }\n\n eval() {\n return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo());\n }\n\n compare(other) {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n\n isRulesetLike() {\n return this.rulesetLike;\n }\n\n genCSS(context, output) {\n this.nodeVisible = Boolean(this.value);\n if (this.nodeVisible) {\n output.add(this.value, this._fileInfo, this._index, this.mapLines);\n }\n }\n}\n\nAnonymous.prototype.type = 'Anonymous';\nexport default Anonymous;\n","import Node from './node';\nimport Value from './value';\nimport Keyword from './keyword';\nimport Anonymous from './anonymous';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Declaration extends Node {\n constructor(name, value, important, merge, index, currentFileInfo, inline, variable) {\n super();\n\n this.name = name;\n this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]);\n this.important = important ? ` ${important.trim()}` : '';\n this.merge = merge;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.inline = inline || false;\n this.variable = (variable !== undefined) ? variable\n : (name.charAt && (name.charAt(0) === '@'));\n this.allowRoot = true;\n this.setParent(this.value, this);\n }\n\n genCSS(context, output) {\n output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex());\n try {\n this.value.genCSS(context, output);\n }\n catch (e) {\n e.index = this._index;\n e.filename = this._fileInfo.filename;\n throw e;\n }\n output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index);\n }\n\n eval(context) {\n let mathBypass = false;\n let prevMath;\n let name = this.name;\n let evaldValue;\n let variable = this.variable;\n if (typeof name !== 'string') {\n // expand 'primitive' name directly to get\n // things faster (~10% for benchmark.less):\n name = (name.length === 1) && (name[0] instanceof Keyword) ?\n name[0].value : evalName(context, name);\n variable = false; // never treat expanded interpolation as new variable name\n }\n\n // @todo remove when parens-division is default\n if (name === 'font' && context.math === MATH.ALWAYS) {\n mathBypass = true;\n prevMath = context.math;\n context.math = MATH.PARENS_DIVISION;\n }\n try {\n context.importantScope.push({});\n evaldValue = this.value.eval(context);\n\n if (!this.variable && evaldValue.type === 'DetachedRuleset') {\n throw { message: 'Rulesets cannot be evaluated on a property.',\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n let important = this.important;\n const importantResult = context.importantScope.pop();\n if (!important && importantResult.important) {\n important = importantResult.important;\n }\n\n return new Declaration(name,\n evaldValue,\n important,\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline,\n variable);\n }\n catch (e) {\n if (typeof e.index !== 'number') {\n e.index = this.getIndex();\n e.filename = this.fileInfo().filename;\n }\n throw e;\n }\n finally {\n if (mathBypass) {\n context.math = prevMath;\n }\n }\n }\n\n makeImportant() {\n return new Declaration(this.name,\n this.value,\n '!important',\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline);\n }\n}\n\nfunction evalName(context, name) {\n let value = '';\n let i;\n const n = name.length;\n const output = {add: function (s) {value += s;}};\n for (i = 0; i < n; i++) {\n name[i].eval(context).genCSS(context, output);\n }\n return value;\n}\n\nDeclaration.prototype.type = 'Declaration';\nexport default Declaration;","const debugInfo = (context, ctx, lineSeparator) => {\n let result = '';\n if (context.dumpLineNumbers && !context.compress) {\n switch (context.dumpLineNumbers) {\n case 'comments':\n result = debugInfo.asComment(ctx);\n break;\n case 'mediaquery':\n result = debugInfo.asMediaQuery(ctx);\n break;\n case 'all':\n result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx);\n break;\n }\n }\n return result;\n};\n\ndebugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\\n`;\n\ndebugInfo.asMediaQuery = ctx => {\n let filenameWithProtocol = ctx.debugInfo.fileName;\n if (!/^[a-z]+:\\/\\//i.test(filenameWithProtocol)) {\n filenameWithProtocol = `file://${filenameWithProtocol}`;\n }\n return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\\/\\\\])/g, a => {\n if (a == '\\\\') {\n a = '\\/';\n }\n return `\\\\${a}`;\n })}}line{font-family:\\\\00003${ctx.debugInfo.lineNumber}}}\\n`;\n};\n\nexport default debugInfo;\n","import Node from './node';\nimport getDebugInfo from './debug-info';\n\nclass Comment extends Node {\n constructor(value, isLineComment, index, currentFileInfo) {\n super();\n\n this.value = value;\n this.isLineComment = isLineComment;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n genCSS(context, output) {\n if (this.debugInfo) {\n output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n }\n\n isSilent(context) {\n const isCompressed = context.compress && this.value[2] !== '!';\n return this.isLineComment || isCompressed;\n }\n}\n\nComment.prototype.type = 'Comment';\nexport default Comment;\n","const contexts = {};\nexport default contexts;\nimport * as Constants from './constants';\n\nconst copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) {\n if (!original) { return; }\n\n for (let i = 0; i < propertiesToCopy.length; i++) {\n if (original.hasOwnProperty(propertiesToCopy[i])) {\n destination[propertiesToCopy[i]] = original[propertiesToCopy[i]];\n }\n }\n};\n\n/*\n parse is used whilst parsing\n */\nconst parseCopyProperties = [\n // options\n 'paths', // option - unmodified - paths to search for imports on\n 'rewriteUrls', // option - whether to adjust URL's to be relative\n 'rootpath', // option - rootpath to append to URL's\n 'strictImports', // option -\n 'insecure', // option - whether to allow imports from insecure ssl hosts\n 'dumpLineNumbers', // option - whether to dump line numbers\n 'compress', // option - whether to compress\n 'syncImport', // option - whether to import synchronously\n 'chunkInput', // option - whether to chunk input. more performant but causes parse issues.\n 'mime', // browser only - mime type for sheet import\n 'useFileCache', // browser only - whether to use the per file session cache\n // context\n 'processImports', // option & context - whether to process imports. if false then imports will not be imported.\n // Used by the import manager to stop multiple import visitors being created.\n 'pluginManager' // Used as the plugin manager for the session\n];\n\ncontexts.Parse = function(options) {\n copyFromOriginal(options, this, parseCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n};\n\nconst evalCopyProperties = [\n 'paths', // additional include paths\n 'compress', // whether to compress\n 'math', // whether math has to be within parenthesis\n 'strictUnits', // whether units need to evaluate correctly\n 'sourceMap', // whether to output a source map\n 'importMultiple', // whether we are currently importing multiple copies\n 'urlArgs', // whether to add args into url tokens\n 'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false\n 'pluginManager', // Used as the plugin manager for the session\n 'importantScope', // used to bubble up !important statements\n 'rewriteUrls' // option - whether to adjust URL's to be relative\n];\n\nfunction isPathRelative(path) {\n return !/^(?:[a-z-]+:|\\/|#)/i.test(path);\n}\n\nfunction isPathLocalRelative(path) {\n return path.charAt(0) === '.';\n}\n\ncontexts.Eval = class {\n constructor(options, frames) {\n copyFromOriginal(options, this, evalCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n\n this.frames = frames || [];\n this.importantScope = this.importantScope || [];\n this.inCalc = false;\n this.mathOn = true;\n }\n\n enterCalc() {\n if (!this.calcStack) {\n this.calcStack = [];\n }\n this.calcStack.push(true);\n this.inCalc = true;\n }\n\n exitCalc() {\n this.calcStack.pop();\n if (!this.calcStack) {\n this.inCalc = false;\n }\n }\n\n inParenthesis() {\n if (!this.parensStack) {\n this.parensStack = [];\n }\n this.parensStack.push(true);\n };\n\n outOfParenthesis() {\n this.parensStack.pop();\n };\n\n isMathOn(op) {\n if (!this.mathOn) {\n return false;\n }\n if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) {\n return false;\n }\n if (this.math > Constants.Math.PARENS_DIVISION) {\n return this.parensStack && this.parensStack.length;\n }\n return true;\n }\n\n pathRequiresRewrite(path) {\n const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative;\n\n return isRelative(path);\n }\n\n rewritePath(path, rootpath) {\n let newPath;\n\n rootpath = rootpath || '';\n newPath = this.normalizePath(rootpath + path);\n\n // If a path was explicit relative and the rootpath was not an absolute path\n // we must ensure that the new path is also explicit relative.\n if (isPathLocalRelative(path) &&\n isPathRelative(rootpath) &&\n isPathLocalRelative(newPath) === false) {\n newPath = `./${newPath}`;\n }\n\n return newPath;\n }\n\n normalizePath(path) {\n const segments = path.split('/').reverse();\n let segment;\n\n path = [];\n while (segments.length !== 0) {\n segment = segments.pop();\n switch ( segment ) {\n case '.':\n break;\n case '..':\n if ((path.length === 0) || (path[path.length - 1] === '..')) {\n path.push( segment );\n } else {\n path.pop();\n }\n break;\n default:\n path.push(segment);\n break;\n }\n }\n\n return path.join('/');\n }\n}\n","function makeRegistry( base ) {\n return {\n _data: {},\n add: function(name, func) {\n // precautionary case conversion, as later querying of\n // the registry by function-caller uses lower case as well.\n name = name.toLowerCase();\n\n if (this._data.hasOwnProperty(name)) {\n // TODO warn\n }\n this._data[name] = func;\n },\n addMultiple: function(functions) {\n Object.keys(functions).forEach(\n name => {\n this.add(name, functions[name]);\n });\n },\n get: function(name) {\n return this._data[name] || ( base && base.get( name ));\n },\n getLocalFunctions: function() {\n return this._data;\n },\n inherit: function() {\n return makeRegistry( this );\n },\n create: function(base) {\n return makeRegistry(base);\n }\n };\n}\n\nexport default makeRegistry( null );","import Keyword from '../tree/keyword';\n\nconst defaultFunc = {\n eval: function () {\n const v = this.value_;\n const e = this.error_;\n if (e) {\n throw e;\n }\n if (v != null) {\n return v ? Keyword.True : Keyword.False;\n }\n },\n value: function (v) {\n this.value_ = v;\n },\n error: function (e) {\n this.error_ = e;\n },\n reset: function () {\n this.value_ = this.error_ = null;\n }\n};\n\nexport default defaultFunc;\n","import Node from './node';\nimport Declaration from './declaration';\nimport Keyword from './keyword';\nimport Comment from './comment';\nimport Paren from './paren';\nimport Selector from './selector';\nimport Element from './element';\nimport Anonymous from './anonymous';\nimport contexts from '../contexts';\nimport globalFunctionRegistry from '../functions/function-registry';\nimport defaultFunc from '../functions/default';\nimport getDebugInfo from './debug-info';\nimport * as utils from '../utils';\n\nclass Ruleset extends Node {\n constructor(selectors, rules, strictImports, visibilityInfo) {\n super();\n\n this.selectors = selectors;\n this.rules = rules;\n this._lookups = {};\n this._variables = null;\n this._properties = null;\n this.strictImports = strictImports;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n this.setParent(this.selectors, this);\n this.setParent(this.rules, this);\n\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.paths) {\n this.paths = visitor.visitArray(this.paths, true);\n } else if (this.selectors) {\n this.selectors = visitor.visitArray(this.selectors);\n }\n if (this.rules && this.rules.length) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n eval(context) {\n const that = this;\n let selectors;\n let selCnt;\n let selector;\n let i;\n let hasVariable;\n let hasOnePassingSelector = false;\n\n if (this.selectors && (selCnt = this.selectors.length)) {\n selectors = new Array(selCnt);\n defaultFunc.error({\n type: 'Syntax',\n message: 'it is currently only allowed in parametric mixin guards,'\n });\n\n for (i = 0; i < selCnt; i++) {\n selector = this.selectors[i].eval(context);\n for (var j = 0; j < selector.elements.length; j++) {\n if (selector.elements[j].isVariable) {\n hasVariable = true;\n break;\n }\n }\n selectors[i] = selector;\n if (selector.evaldCondition) {\n hasOnePassingSelector = true;\n }\n }\n\n if (hasVariable) {\n const toParseSelectors = new Array(selCnt);\n for (i = 0; i < selCnt; i++) {\n selector = selectors[i];\n toParseSelectors[i] = selector.toCSS(context);\n }\n this.parse.parseNode(\n toParseSelectors.join(','),\n [\"selectors\"], \n selectors[0].getIndex(), \n selectors[0].fileInfo(), \n (err, result) => {\n if (result) {\n selectors = utils.flattenArray(result);\n }\n });\n }\n\n defaultFunc.reset();\n } else {\n hasOnePassingSelector = true;\n }\n\n let rules = this.rules ? utils.copyArray(this.rules) : null;\n const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo());\n let rule;\n let subRule;\n\n ruleset.originalRuleset = this;\n ruleset.root = this.root;\n ruleset.firstRoot = this.firstRoot;\n ruleset.allowImports = this.allowImports;\n\n if (this.debugInfo) {\n ruleset.debugInfo = this.debugInfo;\n }\n\n if (!hasOnePassingSelector) {\n rules.length = 0;\n }\n\n // inherit a function registry from the frames stack when possible;\n // otherwise from the global registry\n ruleset.functionRegistry = (frames => {\n let i = 0;\n const n = frames.length;\n let found;\n for ( ; i !== n ; ++i ) {\n found = frames[ i ].functionRegistry;\n if ( found ) { return found; }\n }\n return globalFunctionRegistry;\n })(context.frames).inherit();\n\n // push the current ruleset to the frames stack\n const ctxFrames = context.frames;\n ctxFrames.unshift(ruleset);\n\n // currrent selectors\n let ctxSelectors = context.selectors;\n if (!ctxSelectors) {\n context.selectors = ctxSelectors = [];\n }\n ctxSelectors.unshift(this.selectors);\n\n // Evaluate imports\n if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {\n ruleset.evalImports(context);\n }\n\n // Store the frames around mixin definitions,\n // so they can be evaluated like closures when the time comes.\n const rsRules = ruleset.rules;\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.evalFirst) {\n rsRules[i] = rule.eval(context);\n }\n }\n\n const mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0;\n\n // Evaluate mixin calls.\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.type === 'MixinCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope if the variable is\n // already there. consider returning false here\n // but we need a way to \"return\" variable from mixins\n return !(ruleset.variable(r.name));\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n } else if (rule.type === 'VariableCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).rules.filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope at all\n return false;\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n if (!rule.evalFirst) {\n rsRules[i] = rule = rule.eval ? rule.eval(context) : rule;\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n // for rulesets, check if it is a css guard and can be removed\n if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) {\n // check if it can be folded in (e.g. & where)\n if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) {\n rsRules.splice(i--, 1);\n\n for (var j = 0; (subRule = rule.rules[j]); j++) {\n if (subRule instanceof Node) {\n subRule.copyVisibilityInfo(rule.visibilityInfo());\n if (!(subRule instanceof Declaration) || !subRule.variable) {\n rsRules.splice(++i, 0, subRule);\n }\n }\n }\n }\n }\n }\n\n // Pop the stack\n ctxFrames.shift();\n ctxSelectors.shift();\n\n if (context.mediaBlocks) {\n for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) {\n context.mediaBlocks[i].bubbleSelectors(selectors);\n }\n }\n\n return ruleset;\n }\n\n evalImports(context) {\n const rules = this.rules;\n let i;\n let importRules;\n if (!rules) { return; }\n\n for (i = 0; i < rules.length; i++) {\n if (rules[i].type === 'Import') {\n importRules = rules[i].eval(context);\n if (importRules && (importRules.length || importRules.length === 0)) {\n rules.splice(...[i, 1].concat(importRules));\n i += importRules.length - 1;\n } else {\n rules.splice(i, 1, importRules);\n }\n this.resetCache();\n }\n }\n }\n\n makeImportant() {\n const result = new Ruleset(this.selectors, this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant();\n } else {\n return r;\n }\n }), this.strictImports, this.visibilityInfo());\n\n return result;\n }\n\n matchArgs(args) {\n return !args || args.length === 0;\n }\n\n // lets you call a css selector with a guard\n matchCondition(args, context) {\n const lastSelector = this.selectors[this.selectors.length - 1];\n if (!lastSelector.evaldCondition) {\n return false;\n }\n if (lastSelector.condition &&\n !lastSelector.condition.eval(\n new contexts.Eval(context,\n context.frames))) {\n return false;\n }\n return true;\n }\n\n resetCache() {\n this._rulesets = null;\n this._variables = null;\n this._properties = null;\n this._lookups = {};\n }\n\n variables() {\n if (!this._variables) {\n this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable === true) {\n hash[r.name] = r;\n }\n // when evaluating variables in an import statement, imports have not been eval'd\n // so we need to go inside import statements.\n // guard against root being a string (in the case of inlined less)\n if (r.type === 'Import' && r.root && r.root.variables) {\n const vars = r.root.variables();\n for (const name in vars) {\n if (vars.hasOwnProperty(name)) {\n hash[name] = r.root.variable(name);\n }\n }\n }\n return hash;\n }, {});\n }\n return this._variables;\n }\n\n properties() {\n if (!this._properties) {\n this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable !== true) {\n const name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ?\n r.name[0].value : r.name;\n // Properties don't overwrite as they can merge\n if (!hash[`$${name}`]) {\n hash[`$${name}`] = [ r ];\n }\n else {\n hash[`$${name}`].push(r);\n }\n }\n return hash;\n }, {});\n }\n return this._properties;\n }\n\n variable(name) {\n const decl = this.variables()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n property(name) {\n const decl = this.properties()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n lastDeclaration() {\n for (let i = this.rules.length; i > 0; i--) {\n const decl = this.rules[i - 1];\n if (decl instanceof Declaration) {\n return this.parseValue(decl);\n }\n }\n }\n\n parseValue(toParse) {\n const self = this;\n function transformDeclaration(decl) {\n if (decl.value instanceof Anonymous && !decl.parsed) {\n if (typeof decl.value.value === 'string') {\n this.parse.parseNode(\n decl.value.value,\n ['value', 'important'], \n decl.value.getIndex(), \n decl.fileInfo(), \n (err, result) => {\n if (err) {\n decl.parsed = true;\n }\n if (result) {\n decl.value = result[0];\n decl.important = result[1] || '';\n decl.parsed = true;\n }\n });\n } else {\n decl.parsed = true;\n }\n\n return decl;\n }\n else {\n return decl;\n }\n }\n if (!Array.isArray(toParse)) {\n return transformDeclaration.call(self, toParse);\n }\n else {\n const nodes = [];\n toParse.forEach(n => {\n nodes.push(transformDeclaration.call(self, n));\n });\n return nodes;\n }\n }\n\n rulesets() {\n if (!this.rules) { return []; }\n\n const filtRules = [];\n const rules = this.rules;\n let i;\n let rule;\n\n for (i = 0; (rule = rules[i]); i++) {\n if (rule.isRuleset) {\n filtRules.push(rule);\n }\n }\n\n return filtRules;\n }\n\n prependRule(rule) {\n const rules = this.rules;\n if (rules) {\n rules.unshift(rule);\n } else {\n this.rules = [ rule ];\n }\n this.setParent(rule, this);\n }\n\n find(selector, self = this, filter) {\n const rules = [];\n let match;\n let foundMixins;\n const key = selector.toCSS();\n\n if (key in this._lookups) { return this._lookups[key]; }\n\n this.rulesets().forEach(rule => {\n if (rule !== self) {\n for (let j = 0; j < rule.selectors.length; j++) {\n match = selector.match(rule.selectors[j]);\n if (match) {\n if (selector.elements.length > match) {\n if (!filter || filter(rule)) {\n foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter);\n for (let i = 0; i < foundMixins.length; ++i) {\n foundMixins[i].path.push(rule);\n }\n Array.prototype.push.apply(rules, foundMixins);\n }\n } else {\n rules.push({ rule, path: []});\n }\n break;\n }\n }\n }\n });\n this._lookups[key] = rules;\n return rules;\n }\n\n genCSS(context, output) {\n let i;\n let j;\n const charsetRuleNodes = [];\n let ruleNodes = [];\n\n let // Line number debugging\n debugInfo;\n\n let rule;\n let path;\n\n context.tabLevel = (context.tabLevel || 0);\n\n if (!this.root) {\n context.tabLevel++;\n }\n\n const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' ');\n const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' ');\n let sep;\n\n let charsetNodeIndex = 0;\n let importNodeIndex = 0;\n for (i = 0; (rule = this.rules[i]); i++) {\n if (rule instanceof Comment) {\n if (importNodeIndex === i) {\n importNodeIndex++;\n }\n ruleNodes.push(rule);\n } else if (rule.isCharset && rule.isCharset()) {\n ruleNodes.splice(charsetNodeIndex, 0, rule);\n charsetNodeIndex++;\n importNodeIndex++;\n } else if (rule.type === 'Import') {\n ruleNodes.splice(importNodeIndex, 0, rule);\n importNodeIndex++;\n } else {\n ruleNodes.push(rule);\n }\n }\n ruleNodes = charsetRuleNodes.concat(ruleNodes);\n\n // If this is the root node, we don't render\n // a selector, or {}.\n if (!this.root) {\n debugInfo = getDebugInfo(context, this, tabSetStr);\n\n if (debugInfo) {\n output.add(debugInfo);\n output.add(tabSetStr);\n }\n\n const paths = this.paths;\n const pathCnt = paths.length;\n let pathSubCnt;\n\n sep = context.compress ? ',' : (`,\\n${tabSetStr}`);\n\n for (i = 0; i < pathCnt; i++) {\n path = paths[i];\n if (!(pathSubCnt = path.length)) { continue; }\n if (i > 0) { output.add(sep); }\n\n context.firstSelector = true;\n path[0].genCSS(context, output);\n\n context.firstSelector = false;\n for (j = 1; j < pathSubCnt; j++) {\n path[j].genCSS(context, output);\n }\n }\n\n output.add((context.compress ? '{' : ' {\\n') + tabRuleStr);\n }\n\n // Compile rules and rulesets\n for (i = 0; (rule = ruleNodes[i]); i++) {\n\n if (i + 1 === ruleNodes.length) {\n context.lastRule = true;\n }\n\n const currentLastRule = context.lastRule;\n if (rule.isRulesetLike(rule)) {\n context.lastRule = false;\n }\n\n if (rule.genCSS) {\n rule.genCSS(context, output);\n } else if (rule.value) {\n output.add(rule.value.toString());\n }\n\n context.lastRule = currentLastRule;\n\n if (!context.lastRule && rule.isVisible()) {\n output.add(context.compress ? '' : (`\\n${tabRuleStr}`));\n } else {\n context.lastRule = false;\n }\n }\n\n if (!this.root) {\n output.add((context.compress ? '}' : `\\n${tabSetStr}}`));\n context.tabLevel--;\n }\n\n if (!output.isEmpty() && !context.compress && this.firstRoot) {\n output.add('\\n');\n }\n }\n\n joinSelectors(paths, context, selectors) {\n for (let s = 0; s < selectors.length; s++) {\n this.joinSelector(paths, context, selectors[s]);\n }\n }\n\n joinSelector(paths, context, selector) {\n function createParenthesis(elementsToPak, originalElement) {\n let replacementParen;\n let j;\n if (elementsToPak.length === 0) {\n replacementParen = new Paren(elementsToPak[0]);\n } else {\n const insideParent = new Array(elementsToPak.length);\n for (j = 0; j < elementsToPak.length; j++) {\n insideParent[j] = new Element(\n null,\n elementsToPak[j],\n originalElement.isVariable,\n originalElement._index,\n originalElement._fileInfo\n );\n }\n replacementParen = new Paren(new Selector(insideParent));\n }\n return replacementParen;\n }\n\n function createSelector(containedElement, originalElement) {\n let element;\n let selector;\n element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo);\n selector = new Selector([element]);\n return selector;\n }\n\n // joins selector path from `beginningPath` with selector path in `addPath`\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns concatenated path\n function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) {\n let newSelectorPath;\n let lastSelector;\n let newJoinedSelector;\n // our new selector path\n newSelectorPath = [];\n\n // construct the joined selector - if & is the first thing this will be empty,\n // if not newJoinedSelector will be the last set of elements in the selector\n if (beginningPath.length > 0) {\n newSelectorPath = utils.copyArray(beginningPath);\n lastSelector = newSelectorPath.pop();\n newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements));\n }\n else {\n newJoinedSelector = originalSelector.createDerived([]);\n }\n\n if (addPath.length > 0) {\n // /deep/ is a CSS4 selector - (removed, so should deprecate)\n // that is valid without anything in front of it\n // so if the & does not have a combinator that is \"\" or \" \" then\n // and there is a combinator on the parent, then grab that.\n // this also allows + a { & .b { .a & { ... though not sure why you would want to do that\n let combinator = replacedElement.combinator;\n\n const parentEl = addPath[0].elements[0];\n if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) {\n combinator = parentEl.combinator;\n }\n // join the elements so far with the first part of the parent\n newJoinedSelector.elements.push(new Element(\n combinator,\n parentEl.value,\n replacedElement.isVariable,\n replacedElement._index,\n replacedElement._fileInfo\n ));\n newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1));\n }\n\n // now add the joined selector - but only if it is not empty\n if (newJoinedSelector.elements.length !== 0) {\n newSelectorPath.push(newJoinedSelector);\n }\n\n // put together the parent selectors after the join (e.g. the rest of the parent)\n if (addPath.length > 1) {\n let restOfPath = addPath.slice(1);\n restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, []));\n newSelectorPath = newSelectorPath.concat(restOfPath);\n }\n return newSelectorPath;\n }\n\n // joins selector path from `beginningPath` with every selector path in `addPaths` array\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns array with all concatenated paths\n function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) {\n let j;\n for (j = 0; j < beginningPath.length; j++) {\n const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector);\n result.push(newSelectorPath);\n }\n return result;\n }\n\n function mergeElementsOnToSelectors(elements, selectors) {\n let i;\n let sel;\n\n if (elements.length === 0) {\n return ;\n }\n if (selectors.length === 0) {\n selectors.push([ new Selector(elements) ]);\n return;\n }\n\n for (i = 0; (sel = selectors[i]); i++) {\n // if the previous thing in sel is a parent this needs to join on to it\n if (sel.length > 0) {\n sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements));\n }\n else {\n sel.push(new Selector(elements));\n }\n }\n }\n\n // replace all parent selectors inside `inSelector` by content of `context` array\n // resulting selectors are returned inside `paths` array\n // returns true if `inSelector` contained at least one parent selector\n function replaceParentSelector(paths, context, inSelector) {\n // The paths are [[Selector]]\n // The first list is a list of comma separated selectors\n // The inner list is a list of inheritance separated selectors\n // e.g.\n // .a, .b {\n // .c {\n // }\n // }\n // == [[.a] [.c]] [[.b] [.c]]\n //\n let i;\n\n let j;\n let k;\n let currentElements;\n let newSelectors;\n let selectorsMultiplied;\n let sel;\n let el;\n let hadParentSelector = false;\n let length;\n let lastSelector;\n function findNestedSelector(element) {\n let maybeSelector;\n if (!(element.value instanceof Paren)) {\n return null;\n }\n\n maybeSelector = element.value.value;\n if (!(maybeSelector instanceof Selector)) {\n return null;\n }\n\n return maybeSelector;\n }\n\n // the elements from the current selector so far\n currentElements = [];\n // the current list of new selectors to add to the path.\n // We will build it up. We initiate it with one empty selector as we \"multiply\" the new selectors\n // by the parents\n newSelectors = [\n []\n ];\n\n for (i = 0; (el = inSelector.elements[i]); i++) {\n // non parent reference elements just get added\n if (el.value !== '&') {\n const nestedSelector = findNestedSelector(el);\n if (nestedSelector != null) {\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n const nestedPaths = [];\n let replaced;\n const replacedNewSelectors = [];\n replaced = replaceParentSelector(nestedPaths, context, nestedSelector);\n hadParentSelector = hadParentSelector || replaced;\n // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors\n for (k = 0; k < nestedPaths.length; k++) {\n const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el);\n addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors);\n }\n newSelectors = replacedNewSelectors;\n currentElements = [];\n } else {\n currentElements.push(el);\n }\n\n } else {\n hadParentSelector = true;\n // the new list of selectors to add\n selectorsMultiplied = [];\n\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n // loop through our current selectors\n for (j = 0; j < newSelectors.length; j++) {\n sel = newSelectors[j];\n // if we don't have any parent paths, the & might be in a mixin so that it can be used\n // whether there are parents or not\n if (context.length === 0) {\n // the combinator used on el should now be applied to the next element instead so that\n // it is not lost\n if (sel.length > 0) {\n sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo));\n }\n selectorsMultiplied.push(sel);\n }\n else {\n // and the parent selectors\n for (k = 0; k < context.length; k++) {\n // We need to put the current selectors\n // then join the last selector's elements on to the parents selectors\n const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector);\n // add that to our new set of selectors\n selectorsMultiplied.push(newSelectorPath);\n }\n }\n }\n\n // our new selectors has been multiplied, so reset the state\n newSelectors = selectorsMultiplied;\n currentElements = [];\n }\n }\n\n // if we have any elements left over (e.g. .a& .b == .b)\n // add them on to all the current selectors\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n for (i = 0; i < newSelectors.length; i++) {\n length = newSelectors[i].length;\n if (length > 0) {\n paths.push(newSelectors[i]);\n lastSelector = newSelectors[i][length - 1];\n newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList);\n }\n }\n\n return hadParentSelector;\n }\n\n function deriveSelector(visibilityInfo, deriveFrom) {\n const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition);\n newSelector.copyVisibilityInfo(visibilityInfo);\n return newSelector;\n }\n\n // joinSelector code follows\n let i;\n\n let newPaths;\n let hadParentSelector;\n\n newPaths = [];\n hadParentSelector = replaceParentSelector(newPaths, context, selector);\n\n if (!hadParentSelector) {\n if (context.length > 0) {\n newPaths = [];\n for (i = 0; i < context.length; i++) {\n\n const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo()));\n\n concatenated.push(selector);\n newPaths.push(concatenated);\n }\n }\n else {\n newPaths = [[selector]];\n }\n }\n\n for (i = 0; i < newPaths.length; i++) {\n paths.push(newPaths[i]);\n }\n }\n}\n\nRuleset.prototype.type = 'Ruleset';\nRuleset.prototype.isRuleset = true;\nexport default Ruleset;\n","import Node from './node';\nimport Selector from './selector';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\n\nclass AtRule extends Node {\n constructor(\n name,\n value,\n rules,\n index,\n currentFileInfo,\n debugInfo,\n isRooted,\n visibilityInfo\n ) {\n super();\n\n let i;\n\n this.name = name;\n this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value);\n if (rules) {\n if (Array.isArray(rules)) {\n this.rules = rules;\n } else {\n this.rules = [rules];\n this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors();\n }\n for (i = 0; i < this.rules.length; i++) {\n this.rules[i].allowImports = true;\n }\n this.setParent(this.rules, this);\n }\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.debugInfo = debugInfo;\n this.isRooted = isRooted || false;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n const value = this.value;\n const rules = this.rules;\n if (rules) {\n this.rules = visitor.visitArray(rules);\n }\n if (value) {\n this.value = visitor.visit(value);\n }\n }\n\n isRulesetLike() {\n return this.rules || !this.isCharset();\n }\n\n isCharset() {\n return '@charset' === this.name;\n }\n\n genCSS(context, output) {\n const value = this.value;\n const rules = this.rules;\n output.add(this.name, this.fileInfo(), this.getIndex());\n if (value) {\n output.add(' ');\n value.genCSS(context, output);\n }\n if (rules) {\n this.outputRuleset(context, output, rules);\n } else {\n output.add(';');\n }\n }\n\n eval(context) {\n let mediaPathBackup;\n let mediaBlocksBackup;\n let value = this.value;\n let rules = this.rules;\n\n // media stored inside other atrule should not bubble over it\n // backpup media bubbling information\n mediaPathBackup = context.mediaPath;\n mediaBlocksBackup = context.mediaBlocks;\n // deleted media bubbling information\n context.mediaPath = [];\n context.mediaBlocks = [];\n\n if (value) {\n value = value.eval(context);\n }\n if (rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n rules = [rules[0].eval(context)];\n rules[0].root = true;\n }\n // restore media bubbling information\n context.mediaPath = mediaPathBackup;\n context.mediaBlocks = mediaBlocksBackup;\n\n return new AtRule(this.name, value, rules,\n this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo());\n }\n\n variable(name) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.variable.call(this.rules[0], name);\n }\n }\n\n find(...args) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.find.apply(this.rules[0], args);\n }\n }\n\n rulesets() {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.rulesets.apply(this.rules[0]);\n }\n }\n\n outputRuleset(context, output, rules) {\n const ruleCnt = rules.length;\n let i;\n context.tabLevel = (context.tabLevel | 0) + 1;\n\n // Compressed\n if (context.compress) {\n output.add('{');\n for (i = 0; i < ruleCnt; i++) {\n rules[i].genCSS(context, output);\n }\n output.add('}');\n context.tabLevel--;\n return;\n }\n\n // Non-compressed\n const tabSetStr = `\\n${Array(context.tabLevel).join(' ')}`;\n\n const tabRuleStr = `${tabSetStr} `;\n if (!ruleCnt) {\n output.add(` {${tabSetStr}}`);\n } else {\n output.add(` {${tabRuleStr}`);\n rules[0].genCSS(context, output);\n for (i = 1; i < ruleCnt; i++) {\n output.add(tabRuleStr);\n rules[i].genCSS(context, output);\n }\n output.add(`${tabSetStr}}`);\n }\n\n context.tabLevel--;\n }\n}\n\nAtRule.prototype.type = 'AtRule';\nexport default AtRule;\n","import Node from './node';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass DetachedRuleset extends Node {\n constructor(ruleset, frames) {\n super();\n\n this.ruleset = ruleset;\n this.frames = frames;\n this.setParent(this.ruleset, this);\n }\n\n accept(visitor) {\n this.ruleset = visitor.visit(this.ruleset);\n }\n\n eval(context) {\n const frames = this.frames || utils.copyArray(context.frames);\n return new DetachedRuleset(this.ruleset, frames);\n }\n\n callEval(context) {\n return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context);\n }\n}\n\nDetachedRuleset.prototype.type = 'DetachedRuleset';\nDetachedRuleset.prototype.evalFirst = true;\nexport default DetachedRuleset;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport * as utils from '../utils';\n\nclass Unit extends Node {\n constructor(numerator, denominator, backupUnit) {\n super();\n\n this.numerator = numerator ? utils.copyArray(numerator).sort() : [];\n this.denominator = denominator ? utils.copyArray(denominator).sort() : [];\n if (backupUnit) {\n this.backupUnit = backupUnit;\n } else if (numerator && numerator.length) {\n this.backupUnit = numerator[0];\n }\n }\n\n clone() {\n return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit);\n }\n\n genCSS(context, output) {\n // Dimension checks the unit is singular and throws an error if in strict math mode.\n const strictUnits = context && context.strictUnits;\n if (this.numerator.length === 1) {\n output.add(this.numerator[0]); // the ideal situation\n } else if (!strictUnits && this.backupUnit) {\n output.add(this.backupUnit);\n } else if (!strictUnits && this.denominator.length) {\n output.add(this.denominator[0]);\n }\n }\n\n toString() {\n let i;\n let returnStr = this.numerator.join('*');\n for (i = 0; i < this.denominator.length; i++) {\n returnStr += `/${this.denominator[i]}`;\n }\n return returnStr;\n }\n\n compare(other) {\n return this.is(other.toString()) ? 0 : undefined;\n }\n\n is(unitString) {\n return this.toString().toUpperCase() === unitString.toUpperCase();\n }\n\n isLength() {\n return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS());\n }\n\n isEmpty() {\n return this.numerator.length === 0 && this.denominator.length === 0;\n }\n\n isSingular() {\n return this.numerator.length <= 1 && this.denominator.length === 0;\n }\n\n map(callback) {\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n this.numerator[i] = callback(this.numerator[i], false);\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n this.denominator[i] = callback(this.denominator[i], true);\n }\n }\n\n usedUnits() {\n let group;\n const result = {};\n let mapUnit;\n let groupName;\n\n mapUnit = atomicUnit => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit) && !result[groupName]) {\n result[groupName] = atomicUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in unitConversions) {\n if (unitConversions.hasOwnProperty(groupName)) {\n group = unitConversions[groupName];\n\n this.map(mapUnit);\n }\n }\n\n return result;\n }\n\n cancel() {\n const counter = {};\n let atomicUnit;\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n atomicUnit = this.numerator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) + 1;\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n atomicUnit = this.denominator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) - 1;\n }\n\n this.numerator = [];\n this.denominator = [];\n\n for (atomicUnit in counter) {\n if (counter.hasOwnProperty(atomicUnit)) {\n const count = counter[atomicUnit];\n\n if (count > 0) {\n for (i = 0; i < count; i++) {\n this.numerator.push(atomicUnit);\n }\n } else if (count < 0) {\n for (i = 0; i < -count; i++) {\n this.denominator.push(atomicUnit);\n }\n }\n }\n }\n\n this.numerator.sort();\n this.denominator.sort();\n }\n}\n\nUnit.prototype.type = 'Unit';\nexport default Unit;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport Unit from './unit';\nimport Color from './color';\n\n//\n// A number with a unit\n//\nclass Dimension extends Node {\n constructor(value, unit) {\n super();\n\n this.value = parseFloat(value);\n if (isNaN(this.value)) {\n throw new Error('Dimension is not a number.');\n }\n this.unit = (unit && unit instanceof Unit) ? unit :\n new Unit(unit ? [unit] : undefined);\n this.setParent(this.unit, this);\n }\n\n accept(visitor) {\n this.unit = visitor.visit(this.unit);\n }\n\n eval(context) {\n return this;\n }\n\n toColor() {\n return new Color([this.value, this.value, this.value]);\n }\n\n genCSS(context, output) {\n if ((context && context.strictUnits) && !this.unit.isSingular()) {\n throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`);\n }\n\n const value = this.fround(context, this.value);\n let strValue = String(value);\n\n if (value !== 0 && value < 0.000001 && value > -0.000001) {\n // would be output 1e-6 etc.\n strValue = value.toFixed(20).replace(/0+$/, '');\n }\n\n if (context && context.compress) {\n // Zero values doesn't need a unit\n if (value === 0 && this.unit.isLength()) {\n output.add(strValue);\n return;\n }\n\n // Float values doesn't need a leading zero\n if (value > 0 && value < 1) {\n strValue = (strValue).substr(1);\n }\n }\n\n output.add(strValue);\n this.unit.genCSS(context, output);\n }\n\n // In an operation between two Dimensions,\n // we default to the first Dimension's unit,\n // so `1px + 2` will yield `3px`.\n operate(context, op, other) {\n /* jshint noempty:false */\n let value = this._operate(context, op, this.value, other.value);\n\n let unit = this.unit.clone();\n\n if (op === '+' || op === '-') {\n if (unit.numerator.length === 0 && unit.denominator.length === 0) {\n unit = other.unit.clone();\n if (this.unit.backupUnit) {\n unit.backupUnit = this.unit.backupUnit;\n }\n } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) {\n // do nothing\n } else {\n other = other.convertTo(this.unit.usedUnits());\n\n if (context.strictUnits && other.unit.toString() !== unit.toString()) {\n throw new Error(`Incompatible units. Change the units or use the unit function. ` + \n `Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`);\n }\n\n value = this._operate(context, op, this.value, other.value);\n }\n } else if (op === '*') {\n unit.numerator = unit.numerator.concat(other.unit.numerator).sort();\n unit.denominator = unit.denominator.concat(other.unit.denominator).sort();\n unit.cancel();\n } else if (op === '/') {\n unit.numerator = unit.numerator.concat(other.unit.denominator).sort();\n unit.denominator = unit.denominator.concat(other.unit.numerator).sort();\n unit.cancel();\n }\n return new Dimension(value, unit);\n }\n\n compare(other) {\n let a;\n let b;\n\n if (!(other instanceof Dimension)) {\n return undefined;\n }\n\n if (this.unit.isEmpty() || other.unit.isEmpty()) {\n a = this;\n b = other;\n } else {\n a = this.unify();\n b = other.unify();\n if (a.unit.compare(b.unit) !== 0) {\n return undefined;\n }\n }\n\n return Node.numericCompare(a.value, b.value);\n }\n\n unify() {\n return this.convertTo({ length: 'px', duration: 's', angle: 'rad' });\n }\n\n convertTo(conversions) {\n let value = this.value;\n const unit = this.unit.clone();\n let i;\n let groupName;\n let group;\n let targetUnit;\n let derivedConversions = {};\n let applyUnit;\n\n if (typeof conversions === 'string') {\n for (i in unitConversions) {\n if (unitConversions[i].hasOwnProperty(conversions)) {\n derivedConversions = {};\n derivedConversions[i] = conversions;\n }\n }\n conversions = derivedConversions;\n }\n applyUnit = (atomicUnit, denominator) => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit)) {\n if (denominator) {\n value = value / (group[atomicUnit] / group[targetUnit]);\n } else {\n value = value * (group[atomicUnit] / group[targetUnit]);\n }\n\n return targetUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in conversions) {\n if (conversions.hasOwnProperty(groupName)) {\n targetUnit = conversions[groupName];\n group = unitConversions[groupName];\n\n unit.map(applyUnit);\n }\n }\n\n unit.cancel();\n\n return new Dimension(value, unit);\n }\n}\n\nDimension.prototype.type = 'Dimension';\nexport default Dimension;\n","import Node from './node';\nimport Color from './color';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Operation extends Node {\n constructor(op, operands, isSpaced) {\n super();\n\n this.op = op.trim();\n this.operands = operands;\n this.isSpaced = isSpaced;\n }\n\n accept(visitor) {\n this.operands = visitor.visitArray(this.operands);\n }\n\n eval(context) {\n let a = this.operands[0].eval(context);\n let b = this.operands[1].eval(context);\n let op;\n\n if (context.isMathOn(this.op)) {\n op = this.op === './' ? '/' : this.op;\n if (a instanceof Dimension && b instanceof Color) {\n a = a.toColor();\n }\n if (b instanceof Dimension && a instanceof Color) {\n b = b.toColor();\n }\n if (!a.operate) {\n if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n throw { type: 'Operation',\n message: 'Operation on an invalid type' };\n }\n\n return a.operate(context, op, b);\n } else {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n }\n\n genCSS(context, output) {\n this.operands[0].genCSS(context, output);\n if (this.isSpaced) {\n output.add(' ');\n }\n output.add(this.op);\n if (this.isSpaced) {\n output.add(' ');\n }\n this.operands[1].genCSS(context, output);\n }\n}\n\nOperation.prototype.type = 'Operation';\nexport default Operation;\n","import Node from './node';\nimport Paren from './paren';\nimport Comment from './comment';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\nclass Expression extends Node {\n constructor(value, noSpacing) {\n super();\n\n this.value = value;\n this.noSpacing = noSpacing;\n if (!value) {\n throw new Error('Expression requires an array parameter');\n }\n }\n\n accept(visitor) {\n this.value = visitor.visitArray(this.value);\n }\n\n eval(context) {\n let returnValue;\n const mathOn = context.isMathOn();\n\n const inParenthesis = this.parens && \n (context.math !== MATH.STRICT_LEGACY || !this.parensInOp);\n\n let doubleParen = false;\n if (inParenthesis) {\n context.inParenthesis();\n }\n if (this.value.length > 1) {\n returnValue = new Expression(this.value.map(e => {\n if (!e.eval) {\n return e;\n }\n return e.eval(context);\n }), this.noSpacing);\n } else if (this.value.length === 1) {\n if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) {\n doubleParen = true;\n }\n returnValue = this.value[0].eval(context);\n } else {\n returnValue = this;\n }\n if (inParenthesis) {\n context.outOfParenthesis();\n }\n if (this.parens && this.parensInOp && !mathOn && !doubleParen \n && (!(returnValue instanceof Dimension))) {\n returnValue = new Paren(returnValue);\n }\n return returnValue;\n }\n\n genCSS(context, output) {\n for (let i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (!this.noSpacing && i + 1 < this.value.length) {\n output.add(' ');\n }\n }\n }\n\n throwAwayComments() {\n this.value = this.value.filter(v => !(v instanceof Comment));\n }\n}\n\nExpression.prototype.type = 'Expression';\nexport default Expression;\n","import Expression from '../tree/expression';\n\nclass functionCaller {\n constructor(name, context, index, currentFileInfo) {\n this.name = name.toLowerCase();\n this.index = index;\n this.context = context;\n this.currentFileInfo = currentFileInfo;\n\n this.func = context.frames[0].functionRegistry.get(this.name);\n }\n\n isValid() {\n return Boolean(this.func);\n }\n\n call(args) {\n // This code is terrible and should be replaced as per this issue...\n // https://github.com/less/less.js/issues/2477\n if (Array.isArray(args)) {\n args = args.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n })\n .map(item => {\n if (item.type === 'Expression') {\n const subNodes = item.value.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n });\n if (subNodes.length === 1) {\n return subNodes[0];\n } else {\n return new Expression(subNodes);\n }\n }\n return item;\n });\n }\n\n return this.func(...args);\n }\n}\n\nexport default functionCaller;\n","import Node from './node';\nimport Anonymous from './anonymous';\nimport FunctionCaller from '../functions/function-caller';\n\n//\n// A function call node.\n//\nclass Call extends Node {\n constructor(name, args, index, currentFileInfo) {\n super();\n\n this.name = name;\n this.args = args;\n this.calc = name === 'calc';\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n accept(visitor) {\n if (this.args) {\n this.args = visitor.visitArray(this.args);\n }\n }\n\n //\n // When evaluating a function call,\n // we either find the function in the functionRegistry,\n // in which case we call it, passing the evaluated arguments,\n // if this returns null or we cannot find the function, we\n // simply print it out as it appeared originally [2].\n //\n // The reason why we evaluate the arguments, is in the case where\n // we try to pass a variable to a function, like: `saturate(@color)`.\n // The function should receive the value, not the variable.\n //\n eval(context) {\n /**\n * Turn off math for calc(), and switch back on for evaluating nested functions\n */\n const currentMathContext = context.mathOn;\n context.mathOn = !this.calc;\n if (this.calc || context.inCalc) {\n context.enterCalc();\n }\n const args = this.args.map(a => a.eval(context));\n if (this.calc || context.inCalc) {\n context.exitCalc();\n }\n context.mathOn = currentMathContext;\n\n let result;\n const funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo());\n\n if (funcCaller.isValid()) {\n try {\n result = funcCaller.call(args);\n } catch (e) {\n throw { \n type: e.type || 'Runtime',\n message: `error evaluating function \\`${this.name}\\`${e.message ? `: ${e.message}` : ''}`,\n index: this.getIndex(), \n filename: this.fileInfo().filename,\n line: e.lineNumber,\n column: e.columnNumber\n };\n }\n\n if (result !== null && result !== undefined) {\n // Results that that are not nodes are cast as Anonymous nodes\n // Falsy values or booleans are returned as empty nodes\n if (!(result instanceof Node)) {\n if (!result || result === true) {\n result = new Anonymous(null); \n }\n else {\n result = new Anonymous(result.toString()); \n }\n \n }\n result._index = this._index;\n result._fileInfo = this._fileInfo;\n return result;\n }\n\n }\n\n return new Call(this.name, args, this.getIndex(), this.fileInfo());\n }\n\n genCSS(context, output) {\n output.add(`${this.name}(`, this.fileInfo(), this.getIndex());\n\n for (let i = 0; i < this.args.length; i++) {\n this.args[i].genCSS(context, output);\n if (i + 1 < this.args.length) {\n output.add(', ');\n }\n }\n\n output.add(')');\n }\n}\n\nCall.prototype.type = 'Call';\nexport default Call;\n","import Node from './node';\nimport Call from './call';\n\nclass Variable extends Node {\n constructor(name, index, currentFileInfo) {\n super();\n\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let variable;\n let name = this.name;\n\n if (name.indexOf('@@') === 0) {\n name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`;\n }\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive variable definition for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n variable = this.find(context.frames, frame => {\n const v = frame.variable(name);\n if (v) {\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n // If in calc, wrap vars in a function call to cascade evaluate args first\n if (context.inCalc) {\n return (new Call('_SELF', [v.value])).eval(context);\n }\n else {\n return v.value.eval(context);\n }\n }\n });\n if (variable) {\n this.evaluating = false;\n return variable;\n } else {\n throw { type: 'Name',\n message: `variable ${name} is undefined`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nVariable.prototype.type = 'Variable';\nexport default Variable;\n","import Node from './node';\nimport Declaration from './declaration';\n\nclass Property extends Node {\n constructor(name, index, currentFileInfo) {\n super();\n\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let property;\n const name = this.name;\n // TODO: shorten this reference\n const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules;\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive property reference for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n property = this.find(context.frames, frame => {\n let v;\n const vArr = frame.property(name);\n if (vArr) {\n for (let i = 0; i < vArr.length; i++) {\n v = vArr[i];\n\n vArr[i] = new Declaration(v.name,\n v.value,\n v.important,\n v.merge,\n v.index,\n v.currentFileInfo,\n v.inline,\n v.variable\n );\n }\n mergeRules(vArr);\n\n v = vArr[vArr.length - 1];\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n v = v.value.eval(context);\n return v;\n }\n });\n if (property) {\n this.evaluating = false;\n return property;\n } else {\n throw { type: 'Name',\n message: `Property '${name}' is undefined`,\n filename: this.currentFileInfo.filename,\n index: this.index };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nProperty.prototype.type = 'Property';\nexport default Property;\n","import Node from './node';\n\nclass Attribute extends Node {\n constructor(key, op, value) {\n super();\n\n this.key = key;\n this.op = op;\n this.value = value;\n }\n\n eval(context) {\n return new Attribute(this.key.eval ? this.key.eval(context) : this.key,\n this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value);\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context) {\n let value = this.key.toCSS ? this.key.toCSS(context) : this.key;\n\n if (this.op) {\n value += this.op;\n value += (this.value.toCSS ? this.value.toCSS(context) : this.value);\n }\n\n return `[${value}]`;\n }\n}\n\nAttribute.prototype.type = 'Attribute';\nexport default Attribute;\n","import Node from './node';\nimport Variable from './variable';\nimport Property from './property';\n\nclass Quoted extends Node {\n constructor(str, content, escaped, index, currentFileInfo) {\n super();\n\n this.escaped = (escaped == null) ? true : escaped;\n this.value = content || '';\n this.quote = str.charAt(0);\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.variableRegex = /@\\{([\\w-]+)\\}/g;\n this.propRegex = /\\$\\{([\\w-]+)\\}/g;\n }\n\n genCSS(context, output) {\n if (!this.escaped) {\n output.add(this.quote, this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n if (!this.escaped) {\n output.add(this.quote);\n }\n }\n\n containsVariables() {\n return this.value.match(this.variableRegex);\n }\n\n eval(context) {\n const that = this;\n let value = this.value;\n const variableReplacement = (_, name) => {\n const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n const propertyReplacement = (_, name) => {\n const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n function iterativeReplace(value, regexp, replacementFnc) {\n let evaluatedValue = value;\n do {\n value = evaluatedValue.toString();\n evaluatedValue = value.replace(regexp, replacementFnc);\n } while (value !== evaluatedValue);\n return evaluatedValue;\n }\n value = iterativeReplace(value, this.variableRegex, variableReplacement);\n value = iterativeReplace(value, this.propRegex, propertyReplacement);\n return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo());\n }\n\n compare(other) {\n // when comparing quoted strings allow the quote to differ\n if (other.type === 'Quoted' && !this.escaped && !other.escaped) {\n return Node.numericCompare(this.value, other.value);\n } else {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n }\n}\n\nQuoted.prototype.type = 'Quoted';\nexport default Quoted;\n","import Node from './node';\n\nclass URL extends Node {\n constructor(val, index, currentFileInfo, isEvald) {\n super();\n\n this.value = val;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.isEvald = isEvald;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n genCSS(context, output) {\n output.add('url(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n const val = this.value.eval(context);\n let rootpath;\n\n if (!this.isEvald) {\n // Add the rootpath if the URL requires a rewrite\n rootpath = this.fileInfo() && this.fileInfo().rootpath;\n if (typeof rootpath === 'string' &&\n typeof val.value === 'string' &&\n context.pathRequiresRewrite(val.value)) {\n if (!val.quote) {\n rootpath = escapePath(rootpath);\n }\n val.value = context.rewritePath(val.value, rootpath);\n } else {\n val.value = context.normalizePath(val.value);\n }\n\n // Add url args if enabled\n if (context.urlArgs) {\n if (!val.value.match(/^\\s*data:/)) {\n const delimiter = val.value.indexOf('?') === -1 ? '?' : '&';\n const urlArgs = delimiter + context.urlArgs;\n if (val.value.indexOf('#') !== -1) {\n val.value = val.value.replace('#', `${urlArgs}#`);\n } else {\n val.value += urlArgs;\n }\n }\n }\n }\n\n return new URL(val, this.getIndex(), this.fileInfo(), true);\n }\n}\n\nURL.prototype.type = 'Url';\n\nfunction escapePath(path) {\n return path.replace(/[\\(\\)'\"\\s]/g, match => `\\\\${match}`);\n}\n\nexport default URL;\n","import Ruleset from './ruleset';\nimport Value from './value';\nimport Selector from './selector';\nimport Anonymous from './anonymous';\nimport Expression from './expression';\nimport AtRule from './atrule';\nimport * as utils from '../utils';\n\nclass Media extends AtRule {\n constructor(value, features, index, currentFileInfo, visibilityInfo) {\n super();\n\n this._index = index;\n this._fileInfo = currentFileInfo;\n\n const selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors();\n\n this.features = new Value(features);\n this.rules = [new Ruleset(selectors, value)];\n this.rules[0].allowImports = true;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n this.setParent(selectors, this);\n this.setParent(this.features, this);\n this.setParent(this.rules, this);\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n if (this.rules) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n genCSS(context, output) {\n output.add('@media ', this._fileInfo, this._index);\n this.features.genCSS(context, output);\n this.outputRuleset(context, output, this.rules);\n }\n\n eval(context) {\n if (!context.mediaBlocks) {\n context.mediaBlocks = [];\n context.mediaPath = [];\n }\n\n const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo());\n if (this.debugInfo) {\n this.rules[0].debugInfo = this.debugInfo;\n media.debugInfo = this.debugInfo;\n }\n \n media.features = this.features.eval(context);\n\n context.mediaPath.push(media);\n context.mediaBlocks.push(media);\n\n this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit();\n context.frames.unshift(this.rules[0]);\n media.rules = [this.rules[0].eval(context)];\n context.frames.shift();\n\n context.mediaPath.pop();\n\n return context.mediaPath.length === 0 ? media.evalTop(context) :\n media.evalNested(context);\n }\n\n evalTop(context) {\n let result = this;\n\n // Render all dependent Media blocks.\n if (context.mediaBlocks.length > 1) {\n const selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors();\n result = new Ruleset(selectors, context.mediaBlocks);\n result.multiMedia = true;\n result.copyVisibilityInfo(this.visibilityInfo());\n this.setParent(result, this);\n }\n\n delete context.mediaBlocks;\n delete context.mediaPath;\n\n return result;\n }\n\n evalNested(context) {\n let i;\n let value;\n const path = context.mediaPath.concat([this]);\n\n // Extract the media-query conditions separated with `,` (OR).\n for (i = 0; i < path.length; i++) {\n value = path[i].features instanceof Value ?\n path[i].features.value : path[i].features;\n path[i] = Array.isArray(value) ? value : [value];\n }\n\n // Trace all permutations to generate the resulting media-query.\n //\n // (a, b and c) with nested (d, e) ->\n // a and d\n // a and e\n // b and c and d\n // b and c and e\n this.features = new Value(this.permute(path).map(path => {\n path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment));\n\n for (i = path.length - 1; i > 0; i--) {\n path.splice(i, 0, new Anonymous('and'));\n }\n\n return new Expression(path);\n }));\n this.setParent(this.features, this);\n\n // Fake a tree-node that doesn't output anything.\n return new Ruleset([], []);\n }\n\n permute(arr) {\n if (arr.length === 0) {\n return [];\n } else if (arr.length === 1) {\n return arr[0];\n } else {\n const result = [];\n const rest = this.permute(arr.slice(1));\n for (let i = 0; i < rest.length; i++) {\n for (let j = 0; j < arr[0].length; j++) {\n result.push([arr[0][j]].concat(rest[i]));\n }\n }\n return result;\n }\n }\n\n bubbleSelectors(selectors) {\n if (!selectors) {\n return;\n }\n this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])];\n this.setParent(this.rules, this);\n }\n}\n\nMedia.prototype.type = 'Media';\nexport default Media;\n","import Node from './node';\nimport Media from './media';\nimport URL from './url';\nimport Quoted from './quoted';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\nimport * as utils from '../utils';\nimport LessError from '../less-error';\n\n//\n// CSS @import node\n//\n// The general strategy here is that we don't want to wait\n// for the parsing to be completed, before we start importing\n// the file. That's because in the context of a browser,\n// most of the time will be spent waiting for the server to respond.\n//\n// On creation, we push the import path to our import queue, though\n// `import,push`, we also pass it a callback, which it'll call once\n// the file has been fetched, and parsed.\n//\nclass Import extends Node {\n constructor(path, features, options, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.options = options;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.path = path;\n this.features = features;\n this.allowRoot = true;\n\n if (this.options.less !== undefined || this.options.inline) {\n this.css = !this.options.less || this.options.inline;\n } else {\n const pathValue = this.getPath();\n if (pathValue && /[#\\.\\&\\?]css([\\?;].*)?$/.test(pathValue)) {\n this.css = true;\n }\n }\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.features, this);\n this.setParent(this.path, this);\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n this.path = visitor.visit(this.path);\n if (!this.options.isPlugin && !this.options.inline && this.root) {\n this.root = visitor.visit(this.root);\n }\n }\n\n genCSS(context, output) {\n if (this.css && this.path._fileInfo.reference === undefined) {\n output.add('@import ', this._fileInfo, this._index);\n this.path.genCSS(context, output);\n if (this.features) {\n output.add(' ');\n this.features.genCSS(context, output);\n }\n output.add(';');\n }\n }\n\n getPath() {\n return (this.path instanceof URL) ?\n this.path.value.value : this.path.value;\n }\n\n isVariableImport() {\n let path = this.path;\n if (path instanceof URL) {\n path = path.value;\n }\n if (path instanceof Quoted) {\n return path.containsVariables();\n }\n\n return true;\n }\n\n evalForImport(context) {\n let path = this.path;\n\n if (path instanceof URL) {\n path = path.value;\n }\n\n return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo());\n }\n\n evalPath(context) {\n const path = this.path.eval(context);\n const fileInfo = this._fileInfo;\n\n if (!(path instanceof URL)) {\n // Add the rootpath if the URL requires a rewrite\n const pathValue = path.value;\n if (fileInfo &&\n pathValue &&\n context.pathRequiresRewrite(pathValue)) {\n path.value = context.rewritePath(pathValue, fileInfo.rootpath);\n } else {\n path.value = context.normalizePath(path.value);\n }\n }\n\n return path;\n }\n\n eval(context) {\n const result = this.doEval(context);\n if (this.options.reference || this.blocksVisibility()) {\n if (result.length || result.length === 0) {\n result.forEach(node => {\n node.addVisibilityBlock();\n }\n );\n } else {\n result.addVisibilityBlock();\n }\n }\n return result;\n }\n\n doEval(context) {\n let ruleset;\n let registry;\n const features = this.features && this.features.eval(context);\n\n if (this.options.isPlugin) {\n if (this.root && this.root.eval) {\n try {\n this.root.eval(context);\n }\n catch (e) {\n e.message = 'Plugin error during evaluation';\n throw new LessError(e, this.root.imports, this.root.filename);\n }\n }\n registry = context.frames[0] && context.frames[0].functionRegistry;\n if ( registry && this.root && this.root.functions ) {\n registry.addMultiple( this.root.functions );\n }\n\n return [];\n }\n\n if (this.skip) {\n if (typeof this.skip === 'function') {\n this.skip = this.skip();\n }\n if (this.skip) {\n return [];\n }\n }\n if (this.options.inline) {\n const contents = new Anonymous(this.root, 0,\n {\n filename: this.importedFilename,\n reference: this.path._fileInfo && this.path._fileInfo.reference\n }, true, true);\n\n return this.features ? new Media([contents], this.features.value) : [contents];\n } else if (this.css) {\n const newImport = new Import(this.evalPath(context), features, this.options, this._index);\n if (!newImport.css && this.error) {\n throw this.error;\n }\n return newImport;\n } else {\n ruleset = new Ruleset(null, utils.copyArray(this.root.rules));\n ruleset.evalImports(context);\n\n return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules;\n }\n }\n}\n\nImport.prototype.type = 'Import';\nexport default Import;\n","import Node from './node';\nimport Variable from './variable';\n\nclass JsEvalNode extends Node {\n evaluateJavaScript(expression, context) {\n let result;\n const that = this;\n const evalContext = {};\n\n if (!context.javascriptEnabled) {\n throw { message: 'Inline JavaScript is not enabled. Is it set in your options?',\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n expression = expression.replace(/@\\{([\\w-]+)\\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context)));\n\n try {\n expression = new Function(`return (${expression})`);\n } catch (e) {\n throw { message: `JavaScript evaluation error: ${e.message} from \\`${expression}\\`` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n const variables = context.frames[0].variables();\n for (const k in variables) {\n if (variables.hasOwnProperty(k)) {\n /* jshint loopfunc:true */\n evalContext[k.slice(1)] = {\n value: variables[k].value,\n toJS: function () {\n return this.value.eval(context).toCSS();\n }\n };\n }\n }\n\n try {\n result = expression.call(evalContext);\n } catch (e) {\n throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/[\"]/g, '\\'')}'` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n return result;\n }\n\n jsify(obj) {\n if (Array.isArray(obj.value) && (obj.value.length > 1)) {\n return `[${obj.value.map(v => v.toCSS()).join(', ')}]`;\n } else {\n return obj.toCSS();\n }\n }\n}\n\nexport default JsEvalNode;\n","import JsEvalNode from './js-eval-node';\nimport Dimension from './dimension';\nimport Quoted from './quoted';\nimport Anonymous from './anonymous';\n\nclass JavaScript extends JsEvalNode {\n constructor(string, escaped, index, currentFileInfo) {\n super();\n\n this.escaped = escaped;\n this.expression = string;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n const result = this.evaluateJavaScript(this.expression, context);\n const type = typeof result;\n\n if (type === 'number' && !isNaN(result)) {\n return new Dimension(result);\n } else if (type === 'string') {\n return new Quoted(`\"${result}\"`, result, this.escaped, this._index);\n } else if (Array.isArray(result)) {\n return new Anonymous(result.join(', '));\n } else {\n return new Anonymous(result);\n }\n }\n}\n\nJavaScript.prototype.type = 'JavaScript';\nexport default JavaScript;\n","import Node from './node';\n\nclass Assignment extends Node {\n constructor(key, val) {\n super();\n\n this.key = key;\n this.value = val;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval(context) {\n if (this.value.eval) {\n return new Assignment(this.key, this.value.eval(context));\n }\n return this;\n }\n\n genCSS(context, output) {\n output.add(`${this.key}=`);\n if (this.value.genCSS) {\n this.value.genCSS(context, output);\n } else {\n output.add(this.value);\n }\n }\n}\n\nAssignment.prototype.type = 'Assignment';\nexport default Assignment;\n","import Node from './node';\n\nclass Condition extends Node {\n constructor(op, l, r, i, negate) {\n super();\n\n this.op = op.trim();\n this.lvalue = l;\n this.rvalue = r;\n this._index = i;\n this.negate = negate;\n }\n\n accept(visitor) {\n this.lvalue = visitor.visit(this.lvalue);\n this.rvalue = visitor.visit(this.rvalue);\n }\n\n eval(context) {\n const result = ((op, a, b) => {\n switch (op) {\n case 'and': return a && b;\n case 'or': return a || b;\n default:\n switch (Node.compare(a, b)) {\n case -1:\n return op === '<' || op === '=<' || op === '<=';\n case 0:\n return op === '=' || op === '>=' || op === '=<' || op === '<=';\n case 1:\n return op === '>' || op === '>=';\n default:\n return false;\n }\n }\n })(this.op, this.lvalue.eval(context), this.rvalue.eval(context));\n\n return this.negate ? !result : result;\n }\n}\n\nCondition.prototype.type = 'Condition';\nexport default Condition;\n","import Node from './node';\n\nclass UnicodeDescriptor extends Node {\n constructor(value) {\n super();\n\n this.value = value;\n }\n}\n\nUnicodeDescriptor.prototype.type = 'UnicodeDescriptor';\n\nexport default UnicodeDescriptor;\n","import Node from './node';\nimport Operation from './operation';\nimport Dimension from './dimension';\n\nclass Negative extends Node {\n constructor(node) {\n super();\n\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('-');\n this.value.genCSS(context, output);\n }\n\n eval(context) {\n if (context.isMathOn()) {\n return (new Operation('*', [new Dimension(-1), this.value])).eval(context);\n }\n return new Negative(this.value.eval(context));\n }\n}\n\nNegative.prototype.type = 'Negative';\nexport default Negative;\n","import Node from './node';\nimport Selector from './selector';\n\nclass Extend extends Node {\n constructor(selector, option, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.selector = selector;\n this.option = option;\n this.object_id = Extend.next_id++;\n this.parent_ids = [this.object_id];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n switch (option) {\n case 'all':\n this.allowBefore = true;\n this.allowAfter = true;\n break;\n default:\n this.allowBefore = false;\n this.allowAfter = false;\n break;\n }\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n this.selector = visitor.visit(this.selector);\n }\n\n eval(context) {\n return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n clone(context) {\n return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n // it concatenates (joins) all selectors in selector array\n findSelfSelectors(selectors) {\n let selfElements = [];\n let i;\n let selectorElements;\n\n for (i = 0; i < selectors.length; i++) {\n selectorElements = selectors[i].elements;\n // duplicate the logic in genCSS function inside the selector node.\n // future TODO - move both logics into the selector joiner visitor\n if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') {\n selectorElements[0].combinator.value = ' ';\n }\n selfElements = selfElements.concat(selectors[i].elements);\n }\n\n this.selfSelectors = [new Selector(selfElements)];\n this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo());\n }\n}\n\nExtend.next_id = 0;\n\nExtend.prototype.type = 'Extend';\nexport default Extend;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport DetachedRuleset from './detached-ruleset';\nimport LessError from '../less-error';\n\nclass VariableCall extends Node {\n constructor(variable, index, currentFileInfo) {\n super();\n\n this.variable = variable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n eval(context) {\n let rules;\n let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context);\n const error = new LessError({message: `Could not evaluate variable call ${this.variable}`});\n\n if (!detachedRuleset.ruleset) {\n if (detachedRuleset.rules) {\n rules = detachedRuleset;\n }\n else if (Array.isArray(detachedRuleset)) {\n rules = new Ruleset('', detachedRuleset);\n }\n else if (Array.isArray(detachedRuleset.value)) {\n rules = new Ruleset('', detachedRuleset.value);\n }\n else {\n throw error;\n }\n detachedRuleset = new DetachedRuleset(rules);\n }\n\n if (detachedRuleset.ruleset) {\n return detachedRuleset.callEval(context);\n }\n throw error;\n }\n}\n\nVariableCall.prototype.type = 'VariableCall';\nexport default VariableCall;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport Selector from './selector';\n\nclass NamespaceValue extends Node {\n constructor(ruleCall, lookups, important, index, fileInfo) {\n super();\n\n this.value = ruleCall;\n this.lookups = lookups;\n this.important = important;\n this._index = index;\n this._fileInfo = fileInfo;\n }\n\n eval(context) {\n let i;\n let j;\n let name;\n let rules = this.value.eval(context);\n\n for (i = 0; i < this.lookups.length; i++) {\n name = this.lookups[i];\n\n /**\n * Eval'd DRs return rulesets.\n * Eval'd mixins return rules, so let's make a ruleset if we need it.\n * We need to do this because of late parsing of values\n */\n if (Array.isArray(rules)) {\n rules = new Ruleset([new Selector()], rules);\n }\n\n if (name === '') {\n rules = rules.lastDeclaration();\n }\n else if (name.charAt(0) === '@') {\n if (name.charAt(1) === '@') {\n name = `@${new Variable(name.substr(1)).eval(context).value}`;\n }\n if (rules.variables) {\n rules = rules.variable(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `variable ${name} not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n else {\n if (name.substring(0, 2) === '$@') {\n name = `$${new Variable(name.substr(1)).eval(context).value}`;\n }\n else {\n name = name.charAt(0) === '$' ? name : `$${name}`;\n }\n if (rules.properties) {\n rules = rules.property(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `property \"${name.substr(1)}\" not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n // Properties are an array of values, since a ruleset can have multiple props.\n // We pick the last one (the \"cascaded\" value)\n rules = rules[rules.length - 1];\n }\n\n if (rules.value) {\n rules = rules.eval(context).value;\n }\n if (rules.ruleset) {\n rules = rules.ruleset.eval(context);\n }\n }\n return rules;\n }\n}\n\nNamespaceValue.prototype.type = 'NamespaceValue';\nexport default NamespaceValue;\n","import Selector from './selector';\nimport Element from './element';\nimport Ruleset from './ruleset';\nimport Declaration from './declaration';\nimport DetachedRuleset from './detached-ruleset';\nimport Expression from './expression';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass Definition extends Ruleset {\n constructor(name, params, rules, condition, variadic, frames, visibilityInfo) {\n super();\n\n this.name = name || 'anonymous mixin';\n this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])];\n this.params = params;\n this.condition = condition;\n this.variadic = variadic;\n this.arity = params.length;\n this.rules = rules;\n this._lookups = {};\n const optionalParameters = [];\n this.required = params.reduce((count, p) => {\n if (!p.name || (p.name && !p.value)) {\n return count + 1;\n }\n else {\n optionalParameters.push(p.name);\n return count;\n }\n }, 0);\n this.optionalParameters = optionalParameters;\n this.frames = frames;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n if (this.params && this.params.length) {\n this.params = visitor.visitArray(this.params);\n }\n this.rules = visitor.visitArray(this.rules);\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n evalParams(context, mixinEnv, args, evaldArguments) {\n /* jshint boss:true */\n const frame = new Ruleset(null, null);\n\n let varargs;\n let arg;\n const params = utils.copyArray(this.params);\n let i;\n let j;\n let val;\n let name;\n let isNamedFound;\n let argIndex;\n let argsLength = 0;\n\n if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) {\n frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit();\n }\n mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames));\n\n if (args) {\n args = utils.copyArray(args);\n argsLength = args.length;\n\n for (i = 0; i < argsLength; i++) {\n arg = args[i];\n if (name = (arg && arg.name)) {\n isNamedFound = false;\n for (j = 0; j < params.length; j++) {\n if (!evaldArguments[j] && name === params[j].name) {\n evaldArguments[j] = arg.value.eval(context);\n frame.prependRule(new Declaration(name, arg.value.eval(context)));\n isNamedFound = true;\n break;\n }\n }\n if (isNamedFound) {\n args.splice(i, 1);\n i--;\n continue;\n } else {\n throw { type: 'Runtime', message: `Named argument for ${this.name} ${args[i].name} not found` };\n }\n }\n }\n }\n argIndex = 0;\n for (i = 0; i < params.length; i++) {\n if (evaldArguments[i]) { continue; }\n\n arg = args && args[argIndex];\n\n if (name = params[i].name) {\n if (params[i].variadic) {\n varargs = [];\n for (j = argIndex; j < argsLength; j++) {\n varargs.push(args[j].value.eval(context));\n }\n frame.prependRule(new Declaration(name, new Expression(varargs).eval(context)));\n } else {\n val = arg && arg.value;\n if (val) {\n // This was a mixin call, pass in a detached ruleset of it's eval'd rules\n if (Array.isArray(val)) {\n val = new DetachedRuleset(new Ruleset('', val));\n }\n else {\n val = val.eval(context);\n }\n } else if (params[i].value) {\n val = params[i].value.eval(mixinEnv);\n frame.resetCache();\n } else {\n throw { type: 'Runtime', message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` };\n }\n\n frame.prependRule(new Declaration(name, val));\n evaldArguments[i] = val;\n }\n }\n\n if (params[i].variadic && args) {\n for (j = argIndex; j < argsLength; j++) {\n evaldArguments[j] = args[j].value.eval(context);\n }\n }\n argIndex++;\n }\n\n return frame;\n }\n\n makeImportant() {\n const rules = !this.rules ? this.rules : this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant(true);\n } else {\n return r;\n }\n });\n const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames);\n return result;\n }\n\n eval(context) {\n return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames));\n }\n\n evalCall(context, args, important) {\n const _arguments = [];\n const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames;\n const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments);\n let rules;\n let ruleset;\n\n frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context)));\n\n rules = utils.copyArray(this.rules);\n\n ruleset = new Ruleset(null, rules);\n ruleset.originalRuleset = this;\n ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames)));\n if (important) {\n ruleset = ruleset.makeImportant();\n }\n return ruleset;\n }\n\n matchCondition(args, context) {\n if (this.condition && !this.condition.eval(\n new contexts.Eval(context,\n [this.evalParams(context, /* the parameter variables */\n new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])]\n .concat(this.frames || []) // the parent namespace/mixin frames\n .concat(context.frames)))) { // the current environment frames\n return false;\n }\n return true;\n }\n\n matchArgs(args, context) {\n const allArgsCnt = (args && args.length) || 0;\n let len;\n const optionalParameters = this.optionalParameters;\n const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => {\n if (optionalParameters.indexOf(p.name) < 0) {\n return count + 1;\n } else {\n return count;\n }\n }, 0);\n\n if (!this.variadic) {\n if (requiredArgsCnt < this.required) {\n return false;\n }\n if (allArgsCnt > this.params.length) {\n return false;\n }\n } else {\n if (requiredArgsCnt < (this.required - 1)) {\n return false;\n }\n }\n\n // check patterns\n len = Math.min(requiredArgsCnt, this.arity);\n\n for (let i = 0; i < len; i++) {\n if (!this.params[i].name && !this.params[i].variadic) {\n if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) {\n return false;\n }\n }\n }\n return true;\n }\n}\n\nDefinition.prototype.type = 'MixinDefinition';\nDefinition.prototype.evalFirst = true;\nexport default Definition;\n","import Node from './node';\nimport Selector from './selector';\nimport MixinDefinition from './mixin-definition';\nimport defaultFunc from '../functions/default';\n\nclass MixinCall extends Node {\n constructor(elements, args, index, currentFileInfo, important) {\n super();\n\n this.selector = new Selector(elements);\n this.arguments = args || [];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.important = important;\n this.allowRoot = true;\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n if (this.selector) {\n this.selector = visitor.visit(this.selector);\n }\n if (this.arguments.length) {\n this.arguments = visitor.visitArray(this.arguments);\n }\n }\n\n eval(context) {\n let mixins;\n let mixin;\n let mixinPath;\n const args = [];\n let arg;\n let argValue;\n const rules = [];\n let match = false;\n let i;\n let m;\n let f;\n let isRecursive;\n let isOneFound;\n const candidates = [];\n let candidate;\n const conditionResult = [];\n let defaultResult;\n const defFalseEitherCase = -1;\n const defNone = 0;\n const defTrue = 1;\n const defFalse = 2;\n let count;\n let originalRuleset;\n let noArgumentsFilter;\n\n this.selector = this.selector.eval(context);\n\n function calcDefGroup(mixin, mixinPath) {\n let f;\n let p;\n let namespace;\n\n for (f = 0; f < 2; f++) {\n conditionResult[f] = true;\n defaultFunc.value(f);\n for (p = 0; p < mixinPath.length && conditionResult[f]; p++) {\n namespace = mixinPath[p];\n if (namespace.matchCondition) {\n conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context);\n }\n }\n if (mixin.matchCondition) {\n conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context);\n }\n }\n if (conditionResult[0] || conditionResult[1]) {\n if (conditionResult[0] != conditionResult[1]) {\n return conditionResult[1] ?\n defTrue : defFalse;\n }\n\n return defNone;\n }\n return defFalseEitherCase;\n }\n\n for (i = 0; i < this.arguments.length; i++) {\n arg = this.arguments[i];\n argValue = arg.value.eval(context);\n if (arg.expand && Array.isArray(argValue.value)) {\n argValue = argValue.value;\n for (m = 0; m < argValue.length; m++) {\n args.push({value: argValue[m]});\n }\n } else {\n args.push({name: arg.name, value: argValue});\n }\n }\n\n noArgumentsFilter = rule => rule.matchArgs(null, context);\n\n for (i = 0; i < context.frames.length; i++) {\n if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) {\n isOneFound = true;\n\n // To make `default()` function independent of definition order we have two \"subpasses\" here.\n // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`),\n // and build candidate list with corresponding flags. Then, when we know all possible matches,\n // we make a final decision.\n\n for (m = 0; m < mixins.length; m++) {\n mixin = mixins[m].rule;\n mixinPath = mixins[m].path;\n isRecursive = false;\n for (f = 0; f < context.frames.length; f++) {\n if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) {\n isRecursive = true;\n break;\n }\n }\n if (isRecursive) {\n continue;\n }\n\n if (mixin.matchArgs(args, context)) {\n candidate = {mixin, group: calcDefGroup(mixin, mixinPath)};\n\n if (candidate.group !== defFalseEitherCase) {\n candidates.push(candidate);\n }\n\n match = true;\n }\n }\n\n defaultFunc.reset();\n\n count = [0, 0, 0];\n for (m = 0; m < candidates.length; m++) {\n count[candidates[m].group]++;\n }\n\n if (count[defNone] > 0) {\n defaultResult = defFalse;\n } else {\n defaultResult = defTrue;\n if ((count[defTrue] + count[defFalse]) > 1) {\n throw { type: 'Runtime',\n message: `Ambiguous use of \\`default()\\` found when matching for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n for (m = 0; m < candidates.length; m++) {\n candidate = candidates[m].group;\n if ((candidate === defNone) || (candidate === defaultResult)) {\n try {\n mixin = candidates[m].mixin;\n if (!(mixin instanceof MixinDefinition)) {\n originalRuleset = mixin.originalRuleset || mixin;\n mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo());\n mixin.originalRuleset = originalRuleset;\n }\n const newRules = mixin.evalCall(context, args, this.important).rules;\n this._setVisibilityToReplacement(newRules);\n Array.prototype.push.apply(rules, newRules);\n } catch (e) {\n throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack };\n }\n }\n }\n\n if (match) {\n return rules;\n }\n }\n }\n if (isOneFound) {\n throw { type: 'Runtime',\n message: `No matching definition was found for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n } else {\n throw { type: 'Name',\n message: `${this.selector.toCSS().trim()} is undefined`,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n _setVisibilityToReplacement(replacement) {\n let i;\n let rule;\n if (this.blocksVisibility()) {\n for (i = 0; i < replacement.length; i++) {\n rule = replacement[i];\n rule.addVisibilityBlock();\n }\n }\n }\n\n format(args) {\n return `${this.selector.toCSS().trim()}(${args ? args.map(a => {\n let argValue = '';\n if (a.name) {\n argValue += `${a.name}:`;\n }\n if (a.value.toCSS) {\n argValue += a.value.toCSS();\n } else {\n argValue += '???';\n }\n return argValue;\n }).join(', ') : ''})`;\n }\n}\n\nMixinCall.prototype.type = 'MixinCall';\nexport default MixinCall;\n","const tree = Object.create(null);\n\nimport Node from './node';\nimport Color from './color';\nimport AtRule from './atrule';\nimport DetachedRuleset from './detached-ruleset';\nimport Operation from './operation';\nimport Dimension from './dimension';\nimport Unit from './unit';\nimport Keyword from './keyword';\nimport Variable from './variable';\nimport Property from './property';\nimport Ruleset from './ruleset';\nimport Element from './element';\nimport Attribute from './attribute';\nimport Combinator from './combinator';\nimport Selector from './selector';\nimport Quoted from './quoted';\nimport Expression from './expression';\nimport Declaration from './declaration';\nimport Call from './call';\nimport URL from './url';\nimport Import from './import';\nimport Comment from './comment';\nimport Anonymous from './anonymous';\nimport Value from './value';\nimport JavaScript from './javascript';\nimport Assignment from './assignment';\nimport Condition from './condition';\nimport Paren from './paren';\nimport Media from './media';\nimport UnicodeDescriptor from './unicode-descriptor';\nimport Negative from './negative';\nimport Extend from './extend';\nimport VariableCall from './variable-call';\nimport NamespaceValue from './namespace-value';\n\n// mixins\nimport MixinCall from './mixin-call';\nimport MixinDefinition from './mixin-definition';\n\nexport default {\n Node, Color, AtRule, DetachedRuleset, Operation,\n Dimension, Unit, Keyword, Variable, Property,\n Ruleset, Element, Attribute, Combinator, Selector,\n Quoted, Expression, Declaration, Call, URL, Import,\n Comment, Anonymous, Value, JavaScript, Assignment,\n Condition, Paren, Media, UnicodeDescriptor, Negative,\n Extend, VariableCall, NamespaceValue,\n mixin: {\n Call: MixinCall,\n Definition: MixinDefinition\n }\n};","export default {\n error: function(msg) {\n this._fireEvent('error', msg);\n },\n warn: function(msg) {\n this._fireEvent('warn', msg);\n },\n info: function(msg) {\n this._fireEvent('info', msg);\n },\n debug: function(msg) {\n this._fireEvent('debug', msg);\n },\n addListener: function(listener) {\n this._listeners.push(listener);\n },\n removeListener: function(listener) {\n for (let i = 0; i < this._listeners.length; i++) {\n if (this._listeners[i] === listener) {\n this._listeners.splice(i, 1);\n return;\n }\n }\n },\n _fireEvent: function(type, msg) {\n for (let i = 0; i < this._listeners.length; i++) {\n const logFunction = this._listeners[i][type];\n if (logFunction) {\n logFunction(msg);\n }\n }\n },\n _listeners: []\n};\n","/**\n * @todo Document why this abstraction exists, and the relationship between\n * environment, file managers, and plugin manager\n */\n\nimport logger from '../logger';\n\nclass environment {\n constructor(externalEnvironment, fileManagers) {\n this.fileManagers = fileManagers || [];\n externalEnvironment = externalEnvironment || {};\n\n const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator'];\n const requiredFunctions = [];\n const functions = requiredFunctions.concat(optionalFunctions);\n\n for (let i = 0; i < functions.length; i++) {\n const propName = functions[i];\n const environmentFunc = externalEnvironment[propName];\n if (environmentFunc) {\n this[propName] = environmentFunc.bind(externalEnvironment);\n } else if (i < requiredFunctions.length) {\n this.warn(`missing required function in environment - ${propName}`);\n }\n }\n }\n\n getFileManager(filename, currentDirectory, options, environment, isSync) {\n\n if (!filename) {\n logger.warn('getFileManager called with no filename.. Please report this issue. continuing.');\n }\n if (currentDirectory == null) {\n logger.warn('getFileManager called with null directory.. Please report this issue. continuing.');\n }\n\n let fileManagers = this.fileManagers;\n if (options.pluginManager) {\n fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers());\n }\n for (let i = fileManagers.length - 1; i >= 0 ; i--) {\n const fileManager = fileManagers[i];\n if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) {\n return fileManager;\n }\n }\n return null;\n }\n\n addFileManager(fileManager) {\n this.fileManagers.push(fileManager);\n }\n\n clearFileManagers() {\n this.fileManagers = [];\n }\n}\n\nexport default environment;\n","class AbstractFileManager {\n getPath(filename) {\n let j = filename.lastIndexOf('?');\n if (j > 0) {\n filename = filename.slice(0, j);\n }\n j = filename.lastIndexOf('/');\n if (j < 0) {\n j = filename.lastIndexOf('\\\\');\n }\n if (j < 0) {\n return '';\n }\n return filename.slice(0, j + 1);\n }\n\n tryAppendExtension(path, ext) {\n return /(\\.[a-z]*$)|([\\?;].*)$/.test(path) ? path : path + ext;\n }\n\n tryAppendLessExtension(path) {\n return this.tryAppendExtension(path, '.less');\n };\n\n supportsSync() { return false; }\n\n alwaysMakePathsAbsolute() { return false; }\n\n isPathAbsolute(filename) {\n return (/^(?:[a-z-]+:|\\/|\\\\|#)/i).test(filename);\n }\n // TODO: pull out / replace?\n join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return basePath + laterPath;\n };\n\n pathDiff(url, baseUrl) {\n // diff between two paths to create a relative path\n const urlParts = this.extractUrlParts(url);\n const baseUrlParts = this.extractUrlParts(baseUrl);\n\n let i;\n let max;\n let urlDirectories;\n let baseUrlDirectories;\n let diff = '';\n if (urlParts.hostPart !== baseUrlParts.hostPart) {\n return '';\n }\n max = Math.max(baseUrlParts.directories.length, urlParts.directories.length);\n for (i = 0; i < max; i++) {\n if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; }\n }\n baseUrlDirectories = baseUrlParts.directories.slice(i);\n urlDirectories = urlParts.directories.slice(i);\n for (i = 0; i < baseUrlDirectories.length - 1; i++) {\n diff += '../';\n }\n for (i = 0; i < urlDirectories.length - 1; i++) {\n diff += `${urlDirectories[i]}/`;\n }\n return diff;\n };\n // helper function, not part of API\n extractUrlParts(url, baseUrl) {\n // urlParts[1] = protocol://hostname/ OR /\n // urlParts[2] = / if path relative to host base\n // urlParts[3] = directories\n // urlParts[4] = filename\n // urlParts[5] = parameters\n\n const urlPartsRegex = /^((?:[a-z-]+:)?\\/{2}(?:[^\\/\\?#]*\\/)|([\\/\\\\]))?((?:[^\\/\\\\\\?#]*[\\/\\\\])*)([^\\/\\\\\\?#]*)([#\\?].*)?$/i;\n\n const urlParts = url.match(urlPartsRegex);\n const returner = {};\n let rawDirectories = [];\n const directories = [];\n let i;\n let baseUrlParts;\n\n if (!urlParts) {\n throw new Error(`Could not parse sheet href - '${url}'`);\n }\n\n // Stylesheets in IE don't always return the full path\n if (baseUrl && (!urlParts[1] || urlParts[2])) {\n baseUrlParts = baseUrl.match(urlPartsRegex);\n if (!baseUrlParts) {\n throw new Error(`Could not parse page url - '${baseUrl}'`);\n }\n urlParts[1] = urlParts[1] || baseUrlParts[1] || '';\n if (!urlParts[2]) {\n urlParts[3] = baseUrlParts[3] + urlParts[3];\n }\n }\n\n if (urlParts[3]) {\n rawDirectories = urlParts[3].replace(/\\\\/g, '/').split('/');\n\n // collapse '..' and skip '.'\n for (i = 0; i < rawDirectories.length; i++) {\n\n if (rawDirectories[i] === '..') {\n directories.pop();\n }\n else if (rawDirectories[i] !== '.') {\n directories.push(rawDirectories[i]);\n }\n \n }\n }\n\n returner.hostPart = urlParts[1];\n returner.directories = directories;\n returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/');\n returner.path = (urlParts[1] || '') + directories.join('/');\n returner.filename = urlParts[4];\n returner.fileUrl = returner.path + (urlParts[4] || '');\n returner.url = returner.fileUrl + (urlParts[5] || '');\n return returner;\n };\n}\n\nexport default AbstractFileManager;\n","import functionRegistry from '../functions/function-registry';\nimport LessError from '../less-error';\n\nclass AbstractPluginLoader {\n constructor() {\n // Implemented by Node.js plugin loader\n this.require = () => null\n }\n\n evalPlugin(contents, context, imports, pluginOptions, fileInfo) {\n let loader;\n let registry;\n let pluginObj;\n let localModule;\n let pluginManager;\n let filename;\n let result;\n\n pluginManager = context.pluginManager;\n\n if (fileInfo) {\n if (typeof fileInfo === 'string') {\n filename = fileInfo;\n }\n else {\n filename = fileInfo.filename;\n }\n }\n const shortname = (new this.less.FileManager()).extractUrlParts(filename).filename;\n\n if (filename) {\n pluginObj = pluginManager.get(filename);\n\n if (pluginObj) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n return pluginObj;\n }\n }\n localModule = {\n exports: {},\n pluginManager,\n fileInfo\n };\n registry = functionRegistry.create();\n\n const registerPlugin = obj => {\n pluginObj = obj;\n };\n\n try {\n loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents);\n loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo);\n }\n catch (e) {\n return new LessError(e, imports, filename);\n }\n\n if (!pluginObj) {\n pluginObj = localModule.exports;\n }\n pluginObj = this.validatePlugin(pluginObj, filename, shortname);\n\n if (pluginObj instanceof LessError) {\n return pluginObj;\n }\n\n if (pluginObj) {\n pluginObj.imports = imports;\n pluginObj.filename = filename;\n\n // For < 3.x (or unspecified minVersion) - setOptions() before install()\n if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n\n if (result) {\n return result;\n }\n }\n\n // Run on first load\n pluginManager.addPlugin(pluginObj, fileInfo.filename, registry);\n pluginObj.functions = registry.getLocalFunctions();\n\n // Need to call setOptions again because the pluginObj might have functions\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n\n // Run every @plugin call\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n\n }\n else {\n return new LessError({ message: 'Not a valid plugin' }, imports, filename);\n }\n\n return pluginObj;\n }\n\n trySetOptions(plugin, filename, name, options) {\n if (options && !plugin.setOptions) {\n return new LessError({\n message: `Options have been provided but the plugin ${name} does not support any options.`\n });\n }\n try {\n plugin.setOptions && plugin.setOptions(options);\n }\n catch (e) {\n return new LessError(e);\n }\n }\n\n validatePlugin(plugin, filename, name) {\n if (plugin) {\n // support plugins being a function\n // so that the plugin can be more usable programmatically\n if (typeof plugin === 'function') {\n plugin = new plugin();\n }\n\n if (plugin.minVersion) {\n if (this.compareVersion(plugin.minVersion, this.less.version) < 0) {\n return new LessError({\n message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}`\n });\n }\n }\n return plugin;\n }\n return null;\n }\n\n compareVersion(aVersion, bVersion) {\n if (typeof aVersion === 'string') {\n aVersion = aVersion.match(/^(\\d+)\\.?(\\d+)?\\.?(\\d+)?/);\n aVersion.shift();\n }\n for (let i = 0; i < aVersion.length; i++) {\n if (aVersion[i] !== bVersion[i]) {\n return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1;\n }\n }\n return 0;\n }\n\n versionToString(version) {\n let versionString = '';\n for (let i = 0; i < version.length; i++) {\n versionString += (versionString ? '.' : '') + version[i];\n }\n return versionString;\n }\n\n printUsage(plugins) {\n for (let i = 0; i < plugins.length; i++) {\n const plugin = plugins[i];\n if (plugin.printUsage) {\n plugin.printUsage();\n }\n }\n }\n}\n\nexport default AbstractPluginLoader;\n\n","import tree from '../tree';\nconst _visitArgs = { visitDeeper: true };\nlet _hasIndexed = false;\n\nfunction _noop(node) {\n return node;\n}\n\nfunction indexNodeTypes(parent, ticker) {\n // add .typeIndex to tree node types for lookup table\n let key;\n\n let child;\n for (key in parent) { \n /* eslint guard-for-in: 0 */\n child = parent[key];\n switch (typeof child) {\n case 'function':\n // ignore bound functions directly on tree which do not have a prototype\n // or aren't nodes\n if (child.prototype && child.prototype.type) {\n child.prototype.typeIndex = ticker++;\n }\n break;\n case 'object':\n ticker = indexNodeTypes(child, ticker);\n break;\n \n }\n }\n return ticker;\n}\n\nclass Visitor {\n constructor(implementation) {\n this._implementation = implementation;\n this._visitInCache = {};\n this._visitOutCache = {};\n\n if (!_hasIndexed) {\n indexNodeTypes(tree, 1);\n _hasIndexed = true;\n }\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n\n const nodeTypeIndex = node.typeIndex;\n if (!nodeTypeIndex) {\n // MixinCall args aren't a node type?\n if (node.value && node.value.typeIndex) {\n this.visit(node.value);\n }\n return node;\n }\n\n const impl = this._implementation;\n let func = this._visitInCache[nodeTypeIndex];\n let funcOut = this._visitOutCache[nodeTypeIndex];\n const visitArgs = _visitArgs;\n let fnName;\n\n visitArgs.visitDeeper = true;\n\n if (!func) {\n fnName = `visit${node.type}`;\n func = impl[fnName] || _noop;\n funcOut = impl[`${fnName}Out`] || _noop;\n this._visitInCache[nodeTypeIndex] = func;\n this._visitOutCache[nodeTypeIndex] = funcOut;\n }\n\n if (func !== _noop) {\n const newNode = func.call(impl, node, visitArgs);\n if (node && impl.isReplacing) {\n node = newNode;\n }\n }\n\n if (visitArgs.visitDeeper && node && node.accept) {\n node.accept(this);\n }\n\n if (funcOut != _noop) {\n funcOut.call(impl, node);\n }\n\n return node;\n }\n\n visitArray(nodes, nonReplacing) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n\n // Non-replacing\n if (nonReplacing || !this._implementation.isReplacing) {\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n // Replacing\n const out = [];\n for (i = 0; i < cnt; i++) {\n const evald = this.visit(nodes[i]);\n if (evald === undefined) { continue; }\n if (!evald.splice) {\n out.push(evald);\n } else if (evald.length) {\n this.flatten(evald, out);\n }\n }\n return out;\n }\n\n flatten(arr, out) {\n if (!out) {\n out = [];\n }\n\n let cnt;\n let i;\n let item;\n let nestedCnt;\n let j;\n let nestedItem;\n\n for (i = 0, cnt = arr.length; i < cnt; i++) {\n item = arr[i];\n if (item === undefined) {\n continue;\n }\n if (!item.splice) {\n out.push(item);\n continue;\n }\n\n for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) {\n nestedItem = item[j];\n if (nestedItem === undefined) {\n continue;\n }\n if (!nestedItem.splice) {\n out.push(nestedItem);\n } else if (nestedItem.length) {\n this.flatten(nestedItem, out);\n }\n }\n }\n\n return out;\n }\n}\n\nexport default Visitor;\n","class ImportSequencer {\n constructor(onSequencerEmpty) {\n this.imports = [];\n this.variableImports = [];\n this._onSequencerEmpty = onSequencerEmpty;\n this._currentDepth = 0;\n }\n\n addImport(callback) {\n const importSequencer = this;\n\n const importItem = {\n callback,\n args: null,\n isReady: false\n };\n\n this.imports.push(importItem);\n return function(...args) {\n importItem.args = Array.prototype.slice.call(args, 0);\n importItem.isReady = true;\n importSequencer.tryRun();\n };\n }\n\n addVariableImport(callback) {\n this.variableImports.push(callback);\n }\n\n tryRun() {\n this._currentDepth++;\n try {\n while (true) {\n while (this.imports.length > 0) {\n const importItem = this.imports[0];\n if (!importItem.isReady) {\n return;\n }\n this.imports = this.imports.slice(1);\n importItem.callback.apply(null, importItem.args);\n }\n if (this.variableImports.length === 0) {\n break;\n }\n const variableImport = this.variableImports[0];\n this.variableImports = this.variableImports.slice(1);\n variableImport();\n }\n } finally {\n this._currentDepth--;\n }\n if (this._currentDepth === 0 && this._onSequencerEmpty) {\n this._onSequencerEmpty();\n }\n }\n}\n\nexport default ImportSequencer;\n","import contexts from '../contexts';\nimport Visitor from './visitor';\nimport ImportSequencer from './import-sequencer';\nimport * as utils from '../utils';\n\nconst ImportVisitor = function(importer, finish) {\n\n this._visitor = new Visitor(this);\n this._importer = importer;\n this._finish = finish;\n this.context = new contexts.Eval();\n this.importCount = 0;\n this.onceFileDetectionMap = {};\n this.recursionDetector = {};\n this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this));\n};\n\nImportVisitor.prototype = {\n isReplacing: false,\n run: function (root) {\n try {\n // process the contents\n this._visitor.visit(root);\n }\n catch (e) {\n this.error = e;\n }\n\n this.isFinished = true;\n this._sequencer.tryRun();\n },\n _onSequencerEmpty: function() {\n if (!this.isFinished) {\n return;\n }\n this._finish(this.error);\n },\n visitImport: function (importNode, visitArgs) {\n const inlineCSS = importNode.options.inline;\n\n if (!importNode.css || inlineCSS) {\n\n const context = new contexts.Eval(this.context, utils.copyArray(this.context.frames));\n const importParent = context.frames[0];\n\n this.importCount++;\n if (importNode.isVariableImport()) {\n this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent));\n } else {\n this.processImportNode(importNode, context, importParent);\n }\n }\n visitArgs.visitDeeper = false;\n },\n processImportNode: function(importNode, context, importParent) {\n let evaldImportNode;\n const inlineCSS = importNode.options.inline;\n\n try {\n evaldImportNode = importNode.evalForImport(context);\n } catch (e) {\n if (!e.filename) { e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename; }\n // attempt to eval properly and treat as css\n importNode.css = true;\n // if that fails, this error will be thrown\n importNode.error = e;\n }\n\n if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) {\n if (evaldImportNode.options.multiple) {\n context.importMultiple = true;\n }\n\n // try appending if we haven't determined if it is css or not\n const tryAppendLessExtension = evaldImportNode.css === undefined;\n\n for (let i = 0; i < importParent.rules.length; i++) {\n if (importParent.rules[i] === importNode) {\n importParent.rules[i] = evaldImportNode;\n break;\n }\n }\n\n const onImported = this.onImported.bind(this, evaldImportNode, context);\n const sequencedOnImported = this._sequencer.addImport(onImported);\n\n this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(),\n evaldImportNode.options, sequencedOnImported);\n } else {\n this.importCount--;\n if (this.isFinished) {\n this._sequencer.tryRun();\n }\n }\n },\n onImported: function (importNode, context, e, root, importedAtRoot, fullPath) {\n if (e) {\n if (!e.filename) {\n e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename;\n }\n this.error = e;\n }\n\n const importVisitor = this;\n const inlineCSS = importNode.options.inline;\n const isPlugin = importNode.options.isPlugin;\n const isOptional = importNode.options.optional;\n const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector;\n\n if (!context.importMultiple) {\n if (duplicateImport) {\n importNode.skip = true;\n } else {\n importNode.skip = () => {\n if (fullPath in importVisitor.onceFileDetectionMap) {\n return true;\n }\n importVisitor.onceFileDetectionMap[fullPath] = true;\n return false;\n };\n }\n }\n\n if (!fullPath && isOptional) {\n importNode.skip = true;\n }\n\n if (root) {\n importNode.root = root;\n importNode.importedFilename = fullPath;\n\n if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) {\n importVisitor.recursionDetector[fullPath] = true;\n\n const oldContext = this.context;\n this.context = context;\n try {\n this._visitor.visit(root);\n } catch (e) {\n this.error = e;\n }\n this.context = oldContext;\n }\n }\n\n importVisitor.importCount--;\n\n if (importVisitor.isFinished) {\n importVisitor._sequencer.tryRun();\n }\n },\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.unshift(declNode);\n } else {\n visitArgs.visitDeeper = false;\n }\n },\n visitDeclarationOut: function(declNode) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.shift();\n }\n },\n visitAtRule: function (atRuleNode, visitArgs) {\n this.context.frames.unshift(atRuleNode);\n },\n visitAtRuleOut: function (atRuleNode) {\n this.context.frames.shift();\n },\n visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {\n this.context.frames.unshift(mixinDefinitionNode);\n },\n visitMixinDefinitionOut: function (mixinDefinitionNode) {\n this.context.frames.shift();\n },\n visitRuleset: function (rulesetNode, visitArgs) {\n this.context.frames.unshift(rulesetNode);\n },\n visitRulesetOut: function (rulesetNode) {\n this.context.frames.shift();\n },\n visitMedia: function (mediaNode, visitArgs) {\n this.context.frames.unshift(mediaNode.rules[0]);\n },\n visitMediaOut: function (mediaNode) {\n this.context.frames.shift();\n }\n};\nexport default ImportVisitor;\n","class SetTreeVisibilityVisitor {\n constructor(visible) {\n this.visible = visible;\n }\n\n run(root) {\n this.visit(root);\n }\n\n visitArray(nodes) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n if (node.constructor === Array) {\n return this.visitArray(node);\n }\n\n if (!node.blocksVisibility || node.blocksVisibility()) {\n return node;\n }\n if (this.visible) {\n node.ensureVisibility();\n } else {\n node.ensureInvisibility();\n }\n\n node.accept(this);\n return node;\n }\n}\n\nexport default SetTreeVisibilityVisitor;","import tree from '../tree';\nimport Visitor from './visitor';\nimport logger from '../logger';\nimport * as utils from '../utils';\n\n/* jshint loopfunc:true */\n\nclass ExtendFinderVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n this.contexts = [];\n this.allExtendsStack = [[]];\n }\n\n run(root) {\n root = this._visitor.visit(root);\n root.allExtends = this.allExtendsStack[0];\n return root;\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n\n let i;\n let j;\n let extend;\n const allSelectorsExtendList = [];\n let extendList;\n\n // get &:extend(.a); rules which apply to all selectors in this ruleset\n const rules = rulesetNode.rules;\n\n const ruleCnt = rules ? rules.length : 0;\n for (i = 0; i < ruleCnt; i++) {\n if (rulesetNode.rules[i] instanceof tree.Extend) {\n allSelectorsExtendList.push(rules[i]);\n rulesetNode.extendOnEveryPath = true;\n }\n }\n\n // now find every selector and apply the extends that apply to all extends\n // and the ones which apply to an individual extend\n const paths = rulesetNode.paths;\n for (i = 0; i < paths.length; i++) {\n const selectorPath = paths[i];\n const selector = selectorPath[selectorPath.length - 1];\n const selExtendList = selector.extendList;\n\n extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList)\n : allSelectorsExtendList;\n\n if (extendList) {\n extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone());\n }\n\n for (j = 0; j < extendList.length; j++) {\n this.foundExtends = true;\n extend = extendList[j];\n extend.findSelfSelectors(selectorPath);\n extend.ruleset = rulesetNode;\n if (j === 0) { extend.firstExtendOnThisSelectorPath = true; }\n this.allExtendsStack[this.allExtendsStack.length - 1].push(extend);\n }\n }\n\n this.contexts.push(rulesetNode.selectors);\n }\n\n visitRulesetOut(rulesetNode) {\n if (!rulesetNode.root) {\n this.contexts.length = this.contexts.length - 1;\n }\n }\n\n visitMedia(mediaNode, visitArgs) {\n mediaNode.allExtends = [];\n this.allExtendsStack.push(mediaNode.allExtends);\n }\n\n visitMediaOut(mediaNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n atRuleNode.allExtends = [];\n this.allExtendsStack.push(atRuleNode.allExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n}\n\nclass ProcessExtendsVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n const extendFinder = new ExtendFinderVisitor();\n this.extendIndices = {};\n extendFinder.run(root);\n if (!extendFinder.foundExtends) { return root; }\n root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends));\n this.allExtendsStack = [root.allExtends];\n const newRoot = this._visitor.visit(root);\n this.checkExtendsForNonMatched(root.allExtends);\n return newRoot;\n }\n\n checkExtendsForNonMatched(extendList) {\n const indices = this.extendIndices;\n extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => {\n let selector = '_unknown_';\n try {\n selector = extend.selector.toCSS({});\n }\n catch (_) {}\n\n if (!indices[`${extend.index} ${selector}`]) {\n indices[`${extend.index} ${selector}`] = true;\n logger.warn(`extend '${selector}' has no matches`);\n }\n });\n }\n\n doExtendChaining(extendsList, extendsListTarget, iterationCount) {\n //\n // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering\n // and pasting the selector we would do normally, but we are also adding an extend with the same target selector\n // this means this new extend can then go and alter other extends\n //\n // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors\n // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already\n // processed if we look at each selector at a time, as is done in visitRuleset\n\n let extendIndex;\n\n let targetExtendIndex;\n let matches;\n const extendsToAdd = [];\n let newSelector;\n const extendVisitor = this;\n let selectorPath;\n let extend;\n let targetExtend;\n let newExtend;\n\n iterationCount = iterationCount || 0;\n\n // loop through comparing every extend with every target extend.\n // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place\n // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one\n // and the second is the target.\n // the separation into two lists allows us to process a subset of chains with a bigger set, as is the\n // case when processing media queries\n for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) {\n for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) {\n\n extend = extendsList[extendIndex];\n targetExtend = extendsListTarget[targetExtendIndex];\n\n // look for circular references\n if ( extend.parent_ids.indexOf( targetExtend.object_id ) >= 0 ) { continue; }\n\n // find a match in the target extends self selector (the bit before :extend)\n selectorPath = [targetExtend.selfSelectors[0]];\n matches = extendVisitor.findMatch(extend, selectorPath);\n\n if (matches.length) {\n extend.hasFoundMatches = true;\n\n // we found a match, so for each self selector..\n extend.selfSelectors.forEach(selfSelector => {\n const info = targetExtend.visibilityInfo();\n\n // process the extend as usual\n newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible());\n\n // but now we create a new extend from it\n newExtend = new(tree.Extend)(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info);\n newExtend.selfSelectors = newSelector;\n\n // add the extend onto the list of extends for that selector\n newSelector[newSelector.length - 1].extendList = [newExtend];\n\n // record that we need to add it.\n extendsToAdd.push(newExtend);\n newExtend.ruleset = targetExtend.ruleset;\n\n // remember its parents for circular references\n newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids);\n\n // only process the selector once.. if we have :extend(.a,.b) then multiple\n // extends will look at the same selector path, so when extending\n // we know that any others will be duplicates in terms of what is added to the css\n if (targetExtend.firstExtendOnThisSelectorPath) {\n newExtend.firstExtendOnThisSelectorPath = true;\n targetExtend.ruleset.paths.push(newSelector);\n }\n });\n }\n }\n }\n\n if (extendsToAdd.length) {\n // try to detect circular references to stop a stack overflow.\n // may no longer be needed.\n this.extendChainCount++;\n if (iterationCount > 100) {\n let selectorOne = '{unable to calculate}';\n let selectorTwo = '{unable to calculate}';\n try {\n selectorOne = extendsToAdd[0].selfSelectors[0].toCSS();\n selectorTwo = extendsToAdd[0].selector.toCSS();\n }\n catch (e) {}\n throw { message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})`};\n }\n\n // now process the new extends on the existing rules so that we can handle a extending b extending c extending\n // d extending e...\n return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1));\n } else {\n return extendsToAdd;\n }\n }\n\n visitDeclaration(ruleNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitSelector(selectorNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n let matches;\n let pathIndex;\n let extendIndex;\n const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1];\n const selectorsToAdd = [];\n const extendVisitor = this;\n let selectorPath;\n\n // look at each selector path in the ruleset, find any extend matches and then copy, find and replace\n\n for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) {\n for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) {\n selectorPath = rulesetNode.paths[pathIndex];\n\n // extending extends happens initially, before the main pass\n if (rulesetNode.extendOnEveryPath) { continue; }\n const extendList = selectorPath[selectorPath.length - 1].extendList;\n if (extendList && extendList.length) { continue; }\n\n matches = this.findMatch(allExtends[extendIndex], selectorPath);\n\n if (matches.length) {\n allExtends[extendIndex].hasFoundMatches = true;\n\n allExtends[extendIndex].selfSelectors.forEach(selfSelector => {\n let extendedSelectors;\n extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible());\n selectorsToAdd.push(extendedSelectors);\n });\n }\n }\n }\n rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd);\n }\n\n findMatch(extend, haystackSelectorPath) {\n //\n // look through the haystack selector path to try and find the needle - extend.selector\n // returns an array of selector matches that can then be replaced\n //\n let haystackSelectorIndex;\n\n let hackstackSelector;\n let hackstackElementIndex;\n let haystackElement;\n let targetCombinator;\n let i;\n const extendVisitor = this;\n const needleElements = extend.selector.elements;\n const potentialMatches = [];\n let potentialMatch;\n const matches = [];\n\n // loop through the haystack elements\n for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) {\n hackstackSelector = haystackSelectorPath[haystackSelectorIndex];\n\n for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) {\n\n haystackElement = hackstackSelector.elements[hackstackElementIndex];\n\n // if we allow elements before our match we can add a potential match every time. otherwise only at the first element.\n if (extend.allowBefore || (haystackSelectorIndex === 0 && hackstackElementIndex === 0)) {\n potentialMatches.push({pathIndex: haystackSelectorIndex, index: hackstackElementIndex, matched: 0,\n initialCombinator: haystackElement.combinator});\n }\n\n for (i = 0; i < potentialMatches.length; i++) {\n potentialMatch = potentialMatches[i];\n\n // selectors add \" \" onto the first element. When we use & it joins the selectors together, but if we don't\n // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to\n // work out what the resulting combinator will be\n targetCombinator = haystackElement.combinator.value;\n if (targetCombinator === '' && hackstackElementIndex === 0) {\n targetCombinator = ' ';\n }\n\n // if we don't match, null our match to indicate failure\n if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) ||\n (potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator)) {\n potentialMatch = null;\n } else {\n potentialMatch.matched++;\n }\n\n // if we are still valid and have finished, test whether we have elements after and whether these are allowed\n if (potentialMatch) {\n potentialMatch.finished = potentialMatch.matched === needleElements.length;\n if (potentialMatch.finished &&\n (!extend.allowAfter &&\n (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length))) {\n potentialMatch = null;\n }\n }\n // if null we remove, if not, we are still valid, so either push as a valid match or continue\n if (potentialMatch) {\n if (potentialMatch.finished) {\n potentialMatch.length = needleElements.length;\n potentialMatch.endPathIndex = haystackSelectorIndex;\n potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match\n potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again\n matches.push(potentialMatch);\n }\n } else {\n potentialMatches.splice(i, 1);\n i--;\n }\n }\n }\n }\n return matches;\n }\n\n isElementValuesEqual(elementValue1, elementValue2) {\n if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') {\n return elementValue1 === elementValue2;\n }\n if (elementValue1 instanceof tree.Attribute) {\n if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) {\n return false;\n }\n if (!elementValue1.value || !elementValue2.value) {\n if (elementValue1.value || elementValue2.value) {\n return false;\n }\n return true;\n }\n elementValue1 = elementValue1.value.value || elementValue1.value;\n elementValue2 = elementValue2.value.value || elementValue2.value;\n return elementValue1 === elementValue2;\n }\n elementValue1 = elementValue1.value;\n elementValue2 = elementValue2.value;\n if (elementValue1 instanceof tree.Selector) {\n if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) {\n return false;\n }\n for (let i = 0; i < elementValue1.elements.length; i++) {\n if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) {\n if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) {\n return false;\n }\n }\n if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) {\n return false;\n }\n }\n return true;\n }\n return false;\n }\n\n extendSelector(matches, selectorPath, replacementSelector, isVisible) {\n // for a set of matches, replace each match with the replacement selector\n\n let currentSelectorPathIndex = 0;\n\n let currentSelectorPathElementIndex = 0;\n let path = [];\n let matchIndex;\n let selector;\n let firstElement;\n let match;\n let newElements;\n\n for (matchIndex = 0; matchIndex < matches.length; matchIndex++) {\n match = matches[matchIndex];\n selector = selectorPath[match.pathIndex];\n firstElement = new tree.Element(\n match.initialCombinator,\n replacementSelector.elements[0].value,\n replacementSelector.elements[0].isVariable,\n replacementSelector.elements[0].getIndex(),\n replacementSelector.elements[0].fileInfo()\n );\n\n if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n\n newElements = selector.elements\n .slice(currentSelectorPathElementIndex, match.index)\n .concat([firstElement])\n .concat(replacementSelector.elements.slice(1));\n\n if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) {\n path[path.length - 1].elements =\n path[path.length - 1].elements.concat(newElements);\n } else {\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex));\n\n path.push(new tree.Selector(\n newElements\n ));\n }\n currentSelectorPathIndex = match.endPathIndex;\n currentSelectorPathElementIndex = match.endPathElementIndex;\n if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) {\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n }\n\n if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathIndex++;\n }\n\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length));\n path = path.map(currentValue => {\n // we can re-use elements here, because the visibility property matters only for selectors\n const derived = currentValue.createDerived(currentValue.elements);\n if (isVisible) {\n derived.ensureVisibility();\n } else {\n derived.ensureInvisibility();\n }\n return derived;\n });\n return path;\n }\n\n visitMedia(mediaNode, visitArgs) {\n let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitMediaOut(mediaNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n}\n\nexport default ProcessExtendsVisitor;\n","import Visitor from './visitor';\n\nclass JoinSelectorVisitor {\n constructor() {\n this.contexts = [[]];\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n return this._visitor.visit(root);\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n const paths = [];\n let selectors;\n\n this.contexts.push(paths);\n\n if (!rulesetNode.root) {\n selectors = rulesetNode.selectors;\n if (selectors) {\n selectors = selectors.filter(selector => selector.getIsOutput());\n rulesetNode.selectors = selectors.length ? selectors : (selectors = null);\n if (selectors) { rulesetNode.joinSelectors(paths, context, selectors); }\n }\n if (!selectors) { rulesetNode.rules = null; }\n rulesetNode.paths = paths;\n }\n }\n\n visitRulesetOut(rulesetNode) {\n this.contexts.length = this.contexts.length - 1;\n }\n\n visitMedia(mediaNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia);\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n if (atRuleNode.rules && atRuleNode.rules.length) {\n atRuleNode.rules[0].root = (atRuleNode.isRooted || context.length === 0 || null);\n }\n }\n}\n\nexport default JoinSelectorVisitor;\n","import tree from '../tree';\nimport Visitor from './visitor';\n\nclass CSSVisitorUtils {\n constructor(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n }\n\n containsSilentNonBlockedChild(bodyRules) {\n let rule;\n if (!bodyRules) {\n return false;\n }\n for (let r = 0; r < bodyRules.length; r++) {\n rule = bodyRules[r];\n if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) {\n // the atrule contains something that was referenced (likely by extend)\n // therefore it needs to be shown in output too\n return true;\n }\n }\n return false;\n }\n\n keepOnlyVisibleChilds(owner) {\n if (owner && owner.rules) {\n owner.rules = owner.rules.filter(thing => thing.isVisible());\n }\n }\n\n isEmpty(owner) {\n return (owner && owner.rules) \n ? (owner.rules.length === 0) : true;\n }\n\n hasVisibleSelector(rulesetNode) {\n return (rulesetNode && rulesetNode.paths)\n ? (rulesetNode.paths.length > 0) : false;\n }\n\n resolveVisibility(node, originalRules) {\n if (!node.blocksVisibility()) {\n if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) {\n return ;\n }\n\n return node;\n }\n\n const compiledRulesBody = node.rules[0];\n this.keepOnlyVisibleChilds(compiledRulesBody);\n\n if (this.isEmpty(compiledRulesBody)) {\n return ;\n }\n\n node.ensureVisibility();\n node.removeVisibilityBlock();\n\n return node;\n }\n\n isVisibleRuleset(rulesetNode) {\n if (rulesetNode.firstRoot) {\n return true;\n }\n\n if (this.isEmpty(rulesetNode)) {\n return false;\n }\n\n if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) {\n return false;\n }\n\n return true;\n }\n}\n\nconst ToCSSVisitor = function(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n this.utils = new CSSVisitorUtils(context);\n};\n\nToCSSVisitor.prototype = {\n isReplacing: true,\n run: function (root) {\n return this._visitor.visit(root);\n },\n\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.blocksVisibility() || declNode.variable) {\n return;\n }\n return declNode;\n },\n\n visitMixinDefinition: function (mixinNode, visitArgs) {\n // mixin definitions do not get eval'd - this means they keep state\n // so we have to clear that state here so it isn't used if toCSS is called twice\n mixinNode.frames = [];\n },\n\n visitExtend: function (extendNode, visitArgs) {\n },\n\n visitComment: function (commentNode, visitArgs) {\n if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) {\n return;\n }\n return commentNode;\n },\n\n visitMedia: function(mediaNode, visitArgs) {\n const originalRules = mediaNode.rules[0].rules;\n mediaNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n return this.utils.resolveVisibility(mediaNode, originalRules);\n },\n\n visitImport: function (importNode, visitArgs) {\n if (importNode.blocksVisibility()) {\n return ;\n }\n return importNode;\n },\n\n visitAtRule: function(atRuleNode, visitArgs) {\n if (atRuleNode.rules && atRuleNode.rules.length) {\n return this.visitAtRuleWithBody(atRuleNode, visitArgs);\n } else {\n return this.visitAtRuleWithoutBody(atRuleNode, visitArgs);\n }\n },\n\n visitAnonymous: function(anonymousNode, visitArgs) {\n if (!anonymousNode.blocksVisibility()) {\n anonymousNode.accept(this._visitor);\n return anonymousNode;\n }\n },\n\n visitAtRuleWithBody: function(atRuleNode, visitArgs) {\n // if there is only one nested ruleset and that one has no path, then it is\n // just fake ruleset\n function hasFakeRuleset(atRuleNode) {\n const bodyRules = atRuleNode.rules;\n return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0);\n }\n function getBodyRules(atRuleNode) {\n const nodeRules = atRuleNode.rules;\n if (hasFakeRuleset(atRuleNode)) {\n return nodeRules[0].rules;\n }\n\n return nodeRules;\n }\n // it is still true that it is only one ruleset in array\n // this is last such moment\n // process childs\n const originalRules = getBodyRules(atRuleNode);\n atRuleNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n if (!this.utils.isEmpty(atRuleNode)) {\n this._mergeRules(atRuleNode.rules[0].rules);\n }\n\n return this.utils.resolveVisibility(atRuleNode, originalRules);\n },\n\n visitAtRuleWithoutBody: function(atRuleNode, visitArgs) {\n if (atRuleNode.blocksVisibility()) {\n return;\n }\n\n if (atRuleNode.name === '@charset') {\n // Only output the debug info together with subsequent @charset definitions\n // a comment (or @media statement) before the actual @charset atrule would\n // be considered illegal css as it has to be on the first line\n if (this.charset) {\n if (atRuleNode.debugInfo) {\n const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\\n/g, '')} */\\n`);\n comment.debugInfo = atRuleNode.debugInfo;\n return this._visitor.visit(comment);\n }\n return;\n }\n this.charset = true;\n }\n\n return atRuleNode;\n },\n\n checkValidNodes: function(rules, isRoot) {\n if (!rules) {\n return;\n }\n\n for (let i = 0; i < rules.length; i++) {\n const ruleNode = rules[i];\n if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) {\n throw { message: 'Properties must be inside selector blocks. They cannot be in the root',\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode instanceof tree.Call) {\n throw { message: `Function '${ruleNode.name}' is undefined`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode.type && !ruleNode.allowRoot) {\n throw { message: `${ruleNode.type} node returned by a function is not valid here`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n }\n },\n\n visitRuleset: function (rulesetNode, visitArgs) {\n // at this point rulesets are nested into each other\n let rule;\n\n const rulesets = [];\n\n this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot);\n\n if (!rulesetNode.root) {\n // remove invisible paths\n this._compileRulesetPaths(rulesetNode);\n\n // remove rulesets from this ruleset body and compile them separately\n const nodeRules = rulesetNode.rules;\n\n let nodeRuleCnt = nodeRules ? nodeRules.length : 0;\n for (let i = 0; i < nodeRuleCnt; ) {\n rule = nodeRules[i];\n if (rule && rule.rules) {\n // visit because we are moving them out from being a child\n rulesets.push(this._visitor.visit(rule));\n nodeRules.splice(i, 1);\n nodeRuleCnt--;\n continue;\n }\n i++;\n }\n // accept the visitor to remove rules and refactor itself\n // then we can decide nogw whether we want it or not\n // compile body\n if (nodeRuleCnt > 0) {\n rulesetNode.accept(this._visitor);\n } else {\n rulesetNode.rules = null;\n }\n visitArgs.visitDeeper = false;\n } else { // if (! rulesetNode.root) {\n rulesetNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n }\n\n if (rulesetNode.rules) {\n this._mergeRules(rulesetNode.rules);\n this._removeDuplicateRules(rulesetNode.rules);\n }\n\n // now decide whether we keep the ruleset\n if (this.utils.isVisibleRuleset(rulesetNode)) {\n rulesetNode.ensureVisibility();\n rulesets.splice(0, 0, rulesetNode);\n }\n\n if (rulesets.length === 1) {\n return rulesets[0];\n }\n return rulesets;\n },\n\n _compileRulesetPaths: function(rulesetNode) {\n if (rulesetNode.paths) {\n rulesetNode.paths = rulesetNode.paths\n .filter(p => {\n let i;\n if (p[0].elements[0].combinator.value === ' ') {\n p[0].elements[0].combinator = new(tree.Combinator)('');\n }\n for (i = 0; i < p.length; i++) {\n if (p[i].isVisible() && p[i].getIsOutput()) {\n return true;\n }\n }\n return false;\n });\n }\n },\n\n _removeDuplicateRules: function(rules) {\n if (!rules) { return; }\n\n // remove duplicates\n const ruleCache = {};\n\n let ruleList;\n let rule;\n let i;\n\n for (i = rules.length - 1; i >= 0 ; i--) {\n rule = rules[i];\n if (rule instanceof tree.Declaration) {\n if (!ruleCache[rule.name]) {\n ruleCache[rule.name] = rule;\n } else {\n ruleList = ruleCache[rule.name];\n if (ruleList instanceof tree.Declaration) {\n ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)];\n }\n const ruleCSS = rule.toCSS(this._context);\n if (ruleList.indexOf(ruleCSS) !== -1) {\n rules.splice(i, 1);\n } else {\n ruleList.push(ruleCSS);\n }\n }\n }\n }\n },\n\n _mergeRules: function(rules) {\n if (!rules) {\n return; \n }\n\n const groups = {};\n const groupsArr = [];\n\n for (let i = 0; i < rules.length; i++) {\n const rule = rules[i];\n if (rule.merge) {\n const key = rule.name;\n groups[key] ? rules.splice(i--, 1) : \n groupsArr.push(groups[key] = []);\n groups[key].push(rule);\n }\n }\n\n groupsArr.forEach(group => {\n if (group.length > 0) {\n const result = group[0];\n let space = [];\n const comma = [new tree.Expression(space)];\n group.forEach(rule => {\n if ((rule.merge === '+') && (space.length > 0)) {\n comma.push(new tree.Expression(space = []));\n }\n space.push(rule.value);\n result.important = result.important || rule.important;\n });\n result.value = new tree.Value(comma);\n }\n });\n }\n};\n\nexport default ToCSSVisitor;\n","import Visitor from './visitor';\nimport ImportVisitor from './import-visitor';\nimport MarkVisibleSelectorsVisitor from './set-tree-visibility-visitor';\nimport ExtendVisitor from './extend-visitor';\nimport JoinSelectorVisitor from './join-selector-visitor';\nimport ToCSSVisitor from './to-css-visitor';\n\nexport default {\n Visitor,\n ImportVisitor,\n MarkVisibleSelectorsVisitor,\n ExtendVisitor,\n JoinSelectorVisitor,\n ToCSSVisitor\n};\n","import chunker from './chunker';\n\nexport default () => {\n let // Less input string\n input;\n\n let // current chunk\n j;\n\n const // holds state for backtracking\n saveStack = [];\n\n let // furthest index the parser has gone to\n furthest;\n\n let // if this is furthest we got to, this is the probably cause\n furthestPossibleErrorMessage;\n\n let // chunkified input\n chunks;\n\n let // current chunk\n current;\n\n let // index of current chunk, in `input`\n currentPos;\n\n const parserInput = {};\n const CHARCODE_SPACE = 32;\n const CHARCODE_TAB = 9;\n const CHARCODE_LF = 10;\n const CHARCODE_CR = 13;\n const CHARCODE_PLUS = 43;\n const CHARCODE_COMMA = 44;\n const CHARCODE_FORWARD_SLASH = 47;\n const CHARCODE_9 = 57;\n\n function skipWhitespace(length) {\n const oldi = parserInput.i;\n const oldj = j;\n const curr = parserInput.i - currentPos;\n const endIndex = parserInput.i + current.length - curr;\n const mem = (parserInput.i += length);\n const inp = input;\n let c;\n let nextChar;\n let comment;\n\n for (; parserInput.i < endIndex; parserInput.i++) {\n c = inp.charCodeAt(parserInput.i);\n\n if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) {\n nextChar = inp.charAt(parserInput.i + 1);\n if (nextChar === '/') {\n comment = {index: parserInput.i, isLineComment: true};\n let nextNewLine = inp.indexOf('\\n', parserInput.i + 2);\n if (nextNewLine < 0) {\n nextNewLine = endIndex;\n }\n parserInput.i = nextNewLine;\n comment.text = inp.substr(comment.index, parserInput.i - comment.index);\n parserInput.commentStore.push(comment);\n continue;\n } else if (nextChar === '*') {\n const nextStarSlash = inp.indexOf('*/', parserInput.i + 2);\n if (nextStarSlash >= 0) {\n comment = {\n index: parserInput.i,\n text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i),\n isLineComment: false\n };\n parserInput.i += comment.text.length - 1;\n parserInput.commentStore.push(comment);\n continue;\n }\n }\n break;\n }\n\n if ((c !== CHARCODE_SPACE) && (c !== CHARCODE_LF) && (c !== CHARCODE_TAB) && (c !== CHARCODE_CR)) {\n break;\n }\n }\n\n current = current.slice(length + parserInput.i - mem + curr);\n currentPos = parserInput.i;\n\n if (!current.length) {\n if (j < chunks.length - 1) {\n current = chunks[++j];\n skipWhitespace(0); // skip space at the beginning of a chunk\n return true; // things changed\n }\n parserInput.finished = true;\n }\n\n return oldi !== parserInput.i || oldj !== j;\n }\n\n parserInput.save = () => {\n currentPos = parserInput.i;\n saveStack.push( { current, i: parserInput.i, j });\n };\n parserInput.restore = possibleErrorMessage => {\n\n if (parserInput.i > furthest || (parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage)) {\n furthest = parserInput.i;\n furthestPossibleErrorMessage = possibleErrorMessage;\n }\n const state = saveStack.pop();\n current = state.current;\n currentPos = parserInput.i = state.i;\n j = state.j;\n };\n parserInput.forget = () => {\n saveStack.pop();\n };\n parserInput.isWhitespace = offset => {\n const pos = parserInput.i + (offset || 0);\n const code = input.charCodeAt(pos);\n return (code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF);\n };\n\n // Specialization of $(tok)\n parserInput.$re = tok => {\n if (parserInput.i > currentPos) {\n current = current.slice(parserInput.i - currentPos);\n currentPos = parserInput.i;\n }\n\n const m = tok.exec(current);\n if (!m) {\n return null;\n }\n\n skipWhitespace(m[0].length);\n if (typeof m === 'string') {\n return m;\n }\n\n return m.length === 1 ? m[0] : m;\n };\n\n parserInput.$char = tok => {\n if (input.charAt(parserInput.i) !== tok) {\n return null;\n }\n skipWhitespace(1);\n return tok;\n };\n\n parserInput.$str = tok => {\n const tokLength = tok.length;\n\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tokLength; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return null;\n }\n }\n\n skipWhitespace(tokLength);\n return tok;\n };\n\n parserInput.$quoted = loc => {\n const pos = loc || parserInput.i;\n const startChar = input.charAt(pos);\n\n if (startChar !== '\\'' && startChar !== '\"') {\n return;\n }\n const length = input.length;\n const currentPosition = pos;\n\n for (let i = 1; i + currentPosition < length; i++) {\n const nextChar = input.charAt(i + currentPosition);\n switch (nextChar) {\n case '\\\\':\n i++;\n continue;\n case '\\r':\n case '\\n':\n break;\n case startChar:\n const str = input.substr(currentPosition, i + 1);\n if (!loc && loc !== 0) {\n skipWhitespace(i + 1);\n return str\n }\n return [startChar, str];\n default:\n }\n }\n return null;\n };\n\n /**\n * Permissive parsing. Ignores everything except matching {} [] () and quotes\n * until matching token (outside of blocks)\n */\n parserInput.$parseUntil = tok => {\n let quote = '';\n let returnVal = null;\n let inComment = false;\n let blockDepth = 0;\n const blockStack = [];\n const parseGroups = [];\n const length = input.length;\n const startPos = parserInput.i;\n let lastPos = parserInput.i;\n let i = parserInput.i;\n let loop = true;\n let testChar;\n\n if (typeof tok === 'string') {\n testChar = char => char === tok\n } else {\n testChar = char => tok.test(char)\n }\n\n do {\n let prevChar;\n let nextChar = input.charAt(i);\n if (blockDepth === 0 && testChar(nextChar)) {\n returnVal = input.substr(lastPos, i - lastPos);\n if (returnVal) {\n parseGroups.push(returnVal);\n }\n else {\n parseGroups.push(' ');\n }\n returnVal = parseGroups;\n skipWhitespace(i - startPos);\n loop = false\n } else {\n if (inComment) {\n if (nextChar === '*' && \n input.charAt(i + 1) === '/') {\n i++;\n blockDepth--;\n inComment = false;\n }\n i++;\n continue;\n }\n switch (nextChar) {\n case '\\\\':\n i++;\n nextChar = input.charAt(i);\n parseGroups.push(input.substr(lastPos, i - lastPos + 1));\n lastPos = i + 1;\n break;\n case '/':\n if (input.charAt(i + 1) === '*') {\n i++;\n inComment = true;\n blockDepth++;\n }\n break;\n case '\\'':\n case '\"':\n quote = parserInput.$quoted(i);\n if (quote) {\n parseGroups.push(input.substr(lastPos, i - lastPos), quote);\n i += quote[1].length - 1;\n lastPos = i + 1;\n }\n else {\n skipWhitespace(i - startPos);\n returnVal = nextChar;\n loop = false;\n }\n break;\n case '{':\n blockStack.push('}');\n blockDepth++;\n break;\n case '(':\n blockStack.push(')');\n blockDepth++;\n break;\n case '[':\n blockStack.push(']');\n blockDepth++;\n break;\n case '}':\n case ')':\n case ']':\n const expected = blockStack.pop();\n if (nextChar === expected) {\n blockDepth--;\n } else {\n // move the parser to the error and return expected\n skipWhitespace(i - startPos);\n returnVal = expected;\n loop = false;\n }\n }\n i++;\n if (i > length) {\n loop = false;\n }\n }\n prevChar = nextChar;\n } while (loop);\n\n return returnVal ? returnVal : null;\n }\n\n parserInput.autoCommentAbsorb = true;\n parserInput.commentStore = [];\n parserInput.finished = false;\n\n // Same as $(), but don't change the state of the parser,\n // just return the match.\n parserInput.peek = tok => {\n if (typeof tok === 'string') {\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tok.length; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return false;\n }\n }\n return true;\n } else {\n return tok.test(current);\n }\n };\n\n // Specialization of peek()\n // TODO remove or change some currentChar calls to peekChar\n parserInput.peekChar = tok => input.charAt(parserInput.i) === tok;\n\n parserInput.currentChar = () => input.charAt(parserInput.i);\n\n parserInput.prevChar = () => input.charAt(parserInput.i - 1);\n\n parserInput.getInput = () => input;\n\n parserInput.peekNotNumeric = () => {\n const c = input.charCodeAt(parserInput.i);\n // Is the first char of the dimension 0-9, '.', '+' or '-'\n return (c > CHARCODE_9 || c < CHARCODE_PLUS) || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA;\n };\n\n parserInput.start = (str, chunkInput, failFunction) => {\n input = str;\n parserInput.i = j = currentPos = furthest = 0;\n\n // chunking apparently makes things quicker (but my tests indicate\n // it might actually make things slower in node at least)\n // and it is a non-perfect parse - it can't recognise\n // unquoted urls, meaning it can't distinguish comments\n // meaning comments with quotes or {}() in them get 'counted'\n // and then lead to parse errors.\n // In addition if the chunking chunks in the wrong place we might\n // not be able to parse a parser statement in one go\n // this is officially deprecated but can be switched on via an option\n // in the case it causes too much performance issues.\n if (chunkInput) {\n chunks = chunker(str, failFunction);\n } else {\n chunks = [str];\n }\n\n current = chunks[0];\n\n skipWhitespace(0);\n };\n\n parserInput.end = () => {\n let message;\n const isFinished = parserInput.i >= input.length;\n\n if (parserInput.i < furthest) {\n message = furthestPossibleErrorMessage;\n parserInput.i = furthest;\n }\n return {\n isFinished,\n furthest: parserInput.i,\n furthestPossibleErrorMessage: message,\n furthestReachedEnd: parserInput.i >= input.length - 1,\n furthestChar: input[parserInput.i]\n };\n };\n\n return parserInput;\n};\n","// Split the input into chunks.\nexport default (input, fail) => {\n const len = input.length;\n let level = 0;\n let parenLevel = 0;\n let lastOpening;\n let lastOpeningParen;\n let lastMultiComment;\n let lastMultiCommentEndBrace;\n const chunks = [];\n let emitFrom = 0;\n let chunkerCurrentIndex;\n let currentChunkStartIndex;\n let cc;\n let cc2;\n let matched;\n\n function emitChunk(force) {\n const len = chunkerCurrentIndex - emitFrom;\n if (((len < 512) && !force) || !len) {\n return;\n }\n chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1));\n emitFrom = chunkerCurrentIndex + 1;\n }\n\n for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc = input.charCodeAt(chunkerCurrentIndex);\n if (((cc >= 97) && (cc <= 122)) || (cc < 34)) {\n // a-z or whitespace\n continue;\n }\n\n switch (cc) {\n case 40: // (\n parenLevel++;\n lastOpeningParen = chunkerCurrentIndex;\n continue;\n case 41: // )\n if (--parenLevel < 0) {\n return fail('missing opening `(`', chunkerCurrentIndex);\n }\n continue;\n case 59: // ;\n if (!parenLevel) { emitChunk(); }\n continue;\n case 123: // {\n level++;\n lastOpening = chunkerCurrentIndex;\n continue;\n case 125: // }\n if (--level < 0) {\n return fail('missing opening `{`', chunkerCurrentIndex);\n }\n if (!level && !parenLevel) { emitChunk(); }\n continue;\n case 92: // \\\n if (chunkerCurrentIndex < len - 1) { chunkerCurrentIndex++; continue; }\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n case 34:\n case 39:\n case 96: // \", ' and `\n matched = 0;\n currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 > 96) { continue; }\n if (cc2 == cc) { matched = 1; break; }\n if (cc2 == 92) { // \\\n if (chunkerCurrentIndex == len - 1) {\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n }\n chunkerCurrentIndex++;\n }\n }\n if (matched) { continue; }\n return fail(`unmatched \\`${String.fromCharCode(cc)}\\``, currentChunkStartIndex);\n case 47: // /, check for comment\n if (parenLevel || (chunkerCurrentIndex == len - 1)) { continue; }\n cc2 = input.charCodeAt(chunkerCurrentIndex + 1);\n if (cc2 == 47) {\n // //, find lnfeed\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if ((cc2 <= 13) && ((cc2 == 10) || (cc2 == 13))) { break; }\n }\n } else if (cc2 == 42) {\n // /*, find */\n lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 == 125) { lastMultiCommentEndBrace = chunkerCurrentIndex; }\n if (cc2 != 42) { continue; }\n if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { break; }\n }\n if (chunkerCurrentIndex == len - 1) {\n return fail('missing closing `*/`', currentChunkStartIndex);\n }\n chunkerCurrentIndex++;\n }\n continue;\n case 42: // *, check for unmatched */\n if ((chunkerCurrentIndex < len - 1) && (input.charCodeAt(chunkerCurrentIndex + 1) == 47)) {\n return fail('unmatched `/*`', chunkerCurrentIndex);\n }\n continue;\n }\n }\n\n if (level !== 0) {\n if ((lastMultiComment > lastOpening) && (lastMultiCommentEndBrace > lastMultiComment)) {\n return fail('missing closing `}` or `*/`', lastOpening);\n } else {\n return fail('missing closing `}`', lastOpening);\n }\n } else if (parenLevel !== 0) {\n return fail('missing closing `)`', lastOpeningParen);\n }\n\n emitChunk(true);\n return chunks;\n};\n","import LessError from '../less-error';\nimport tree from '../tree';\nimport visitors from '../visitors';\nimport getParserInput from './parser-input';\nimport * as utils from '../utils';\nimport functionRegistry from '../functions/function-registry';\n\n//\n// less.js - parser\n//\n// A relatively straight-forward predictive parser.\n// There is no tokenization/lexing stage, the input is parsed\n// in one sweep.\n//\n// To make the parser fast enough to run in the browser, several\n// optimization had to be made:\n//\n// - Matching and slicing on a huge input is often cause of slowdowns.\n// The solution is to chunkify the input into smaller strings.\n// The chunks are stored in the `chunks` var,\n// `j` holds the current chunk index, and `currentPos` holds\n// the index of the current chunk in relation to `input`.\n// This gives us an almost 4x speed-up.\n//\n// - In many cases, we don't need to match individual tokens;\n// for example, if a value doesn't hold any variables, operations\n// or dynamic references, the parser can effectively 'skip' it,\n// treating it as a literal.\n// An example would be '1px solid #000' - which evaluates to itself,\n// we don't need to know what the individual components are.\n// The drawback, of course is that you don't get the benefits of\n// syntax-checking on the CSS. This gives us a 50% speed-up in the parser,\n// and a smaller speed-up in the code-gen.\n//\n//\n// Token matching is done with the `$` function, which either takes\n// a terminal string or regexp, or a non-terminal function to call.\n// It also takes care of moving all the indices forwards.\n//\n\nconst Parser = function Parser(context, imports, fileInfo) {\n let parsers;\n const parserInput = getParserInput();\n\n function error(msg, type) {\n throw new LessError(\n {\n index: parserInput.i,\n filename: fileInfo.filename,\n type: type || 'Syntax',\n message: msg\n },\n imports\n );\n }\n\n function expect(arg, msg) {\n // some older browsers return typeof 'function' for RegExp\n const result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg);\n if (result) {\n return result;\n }\n \n error(msg || (typeof arg === 'string'\n ? `expected '${arg}' got '${parserInput.currentChar()}'`\n : 'unexpected token'));\n }\n\n // Specialization of expect()\n function expectChar(arg, msg) {\n if (parserInput.$char(arg)) {\n return arg;\n }\n error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`);\n }\n\n function getDebugInfo(index) {\n const filename = fileInfo.filename;\n\n return {\n lineNumber: utils.getLocation(index, parserInput.getInput()).line + 1,\n fileName: filename\n };\n }\n\n /**\n * Used after initial parsing to create nodes on the fly\n * \n * @param {String} str - string to parse \n * @param {Array} parseList - array of parsers to run input through e.g. [\"value\", \"important\"]\n * @param {Number} currentIndex - start number to begin indexing\n * @param {Object} fileInfo - fileInfo to attach to created nodes\n */\n function parseNode(str, parseList, currentIndex, fileInfo, callback) {\n let result;\n const returnNodes = [];\n const parser = parserInput;\n\n try {\n parser.start(str, false, function fail(msg, index) {\n callback({\n message: msg,\n index: index + currentIndex\n });\n });\n for (let x = 0, p, i; (p = parseList[x]); x++) {\n i = parser.i;\n result = parsers[p]();\n if (result) {\n result._index = i + currentIndex;\n result._fileInfo = fileInfo;\n returnNodes.push(result);\n }\n else {\n returnNodes.push(null);\n }\n }\n\n const endInfo = parser.end();\n if (endInfo.isFinished) {\n callback(null, returnNodes);\n }\n else {\n callback(true, null);\n }\n } catch (e) {\n throw new LessError({\n index: e.index + currentIndex,\n message: e.message\n }, imports, fileInfo.filename);\n }\n }\n\n //\n // The Parser\n //\n return {\n parserInput,\n imports,\n fileInfo,\n parseNode,\n //\n // Parse an input string into an abstract syntax tree,\n // @param str A string containing 'less' markup\n // @param callback call `callback` when done.\n // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply\n //\n parse: function (str, callback, additionalData) {\n let root;\n let error = null;\n let globalVars;\n let modifyVars;\n let ignored;\n let preText = '';\n\n globalVars = (additionalData && additionalData.globalVars) ? `${Parser.serializeVars(additionalData.globalVars)}\\n` : '';\n modifyVars = (additionalData && additionalData.modifyVars) ? `\\n${Parser.serializeVars(additionalData.modifyVars)}` : '';\n\n if (context.pluginManager) {\n const preProcessors = context.pluginManager.getPreProcessors();\n for (let i = 0; i < preProcessors.length; i++) {\n str = preProcessors[i].process(str, { context, imports, fileInfo });\n }\n }\n\n if (globalVars || (additionalData && additionalData.banner)) {\n preText = ((additionalData && additionalData.banner) ? additionalData.banner : '') + globalVars;\n ignored = imports.contentsIgnoredChars;\n ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0;\n ignored[fileInfo.filename] += preText.length;\n }\n\n str = str.replace(/\\r\\n?/g, '\\n');\n // Remove potential UTF Byte Order Mark\n str = preText + str.replace(/^\\uFEFF/, '') + modifyVars;\n imports.contents[fileInfo.filename] = str;\n\n // Start with the primary rule.\n // The whole syntax tree is held under a Ruleset node,\n // with the `root` property set to true, so no `{}` are\n // output. The callback is called when the input is parsed.\n try {\n parserInput.start(str, context.chunkInput, function fail(msg, index) {\n throw new LessError({\n index,\n type: 'Parse',\n message: msg,\n filename: fileInfo.filename\n }, imports);\n });\n\n tree.Node.prototype.parse = this;\n root = new tree.Ruleset(null, this.parsers.primary());\n tree.Node.prototype.rootNode = root;\n root.root = true;\n root.firstRoot = true;\n root.functionRegistry = functionRegistry.inherit();\n \n } catch (e) {\n return callback(new LessError(e, imports, fileInfo.filename));\n }\n\n // If `i` is smaller than the `input.length - 1`,\n // it means the parser wasn't able to parse the whole\n // string, so we've got a parsing error.\n //\n // We try to extract a \\n delimited string,\n // showing the line where the parse error occurred.\n // We split it up into two parts (the part which parsed,\n // and the part which didn't), so we can color them differently.\n const endInfo = parserInput.end();\n if (!endInfo.isFinished) {\n\n let message = endInfo.furthestPossibleErrorMessage;\n\n if (!message) {\n message = 'Unrecognised input';\n if (endInfo.furthestChar === '}') {\n message += '. Possibly missing opening \\'{\\'';\n } else if (endInfo.furthestChar === ')') {\n message += '. Possibly missing opening \\'(\\'';\n } else if (endInfo.furthestReachedEnd) {\n message += '. Possibly missing something';\n }\n }\n\n error = new LessError({\n type: 'Parse',\n message,\n index: endInfo.furthest,\n filename: fileInfo.filename\n }, imports);\n }\n\n const finish = e => {\n e = error || e || imports.error;\n\n if (e) {\n if (!(e instanceof LessError)) {\n e = new LessError(e, imports, fileInfo.filename);\n }\n\n return callback(e);\n }\n else {\n return callback(null, root);\n }\n };\n\n if (context.processImports !== false) {\n new visitors.ImportVisitor(imports, finish)\n .run(root);\n } else {\n return finish();\n }\n },\n\n //\n // Here in, the parsing rules/functions\n //\n // The basic structure of the syntax tree generated is as follows:\n //\n // Ruleset -> Declaration -> Value -> Expression -> Entity\n //\n // Here's some Less code:\n //\n // .class {\n // color: #fff;\n // border: 1px solid #000;\n // width: @w + 4px;\n // > .child {...}\n // }\n //\n // And here's what the parse tree might look like:\n //\n // Ruleset (Selector '.class', [\n // Declaration (\"color\", Value ([Expression [Color #fff]]))\n // Declaration (\"border\", Value ([Expression [Dimension 1px][Keyword \"solid\"][Color #000]]))\n // Declaration (\"width\", Value ([Expression [Operation \" + \" [Variable \"@w\"][Dimension 4px]]]))\n // Ruleset (Selector [Element '>', '.child'], [...])\n // ])\n //\n // In general, most rules will try to parse a token with the `$re()` function, and if the return\n // value is truly, will return a new node, of the relevant type. Sometimes, we need to check\n // first, before parsing, that's when we use `peek()`.\n //\n parsers: parsers = {\n //\n // The `primary` rule is the *entry* and *exit* point of the parser.\n // The rules here can appear at any level of the parse tree.\n //\n // The recursive nature of the grammar is an interplay between the `block`\n // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,\n // as represented by this simplified grammar:\n //\n // primary → (ruleset | declaration)+\n // ruleset → selector+ block\n // block → '{' primary '}'\n //\n // Only at one point is the primary rule not called from the\n // block rule: at the root level.\n //\n primary: function () {\n const mixin = this.mixin;\n let root = [];\n let node;\n\n while (true) {\n while (true) {\n node = this.comment();\n if (!node) { break; }\n root.push(node);\n }\n // always process comments before deciding if finished\n if (parserInput.finished) {\n break;\n }\n if (parserInput.peek('}')) {\n break;\n }\n\n node = this.extendRule();\n if (node) {\n root = root.concat(node);\n continue;\n }\n\n node = mixin.definition() || this.declaration() || this.ruleset() ||\n mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule();\n if (node) {\n root.push(node);\n } else {\n let foundSemiColon = false;\n while (parserInput.$char(';')) {\n foundSemiColon = true;\n }\n if (!foundSemiColon) {\n break;\n }\n }\n }\n\n return root;\n },\n\n // comments are collected by the main parsing mechanism and then assigned to nodes\n // where the current structure allows it\n comment: function () {\n if (parserInput.commentStore.length) {\n const comment = parserInput.commentStore.shift();\n return new(tree.Comment)(comment.text, comment.isLineComment, comment.index, fileInfo);\n }\n },\n\n //\n // Entities are tokens which can be found inside an Expression\n //\n entities: {\n mixinLookup: function() {\n return parsers.mixin.call(true, true);\n },\n //\n // A string, which supports escaping \" and '\n //\n // \"milky way\" 'he\\'s the one!'\n //\n quoted: function (forceEscaped) {\n let str;\n const index = parserInput.i;\n let isEscaped = false;\n\n parserInput.save();\n if (parserInput.$char('~')) {\n isEscaped = true;\n } else if (forceEscaped) {\n parserInput.restore();\n return;\n }\n\n str = parserInput.$quoted();\n if (!str) {\n parserInput.restore();\n return;\n }\n parserInput.forget();\n\n return new(tree.Quoted)(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo);\n },\n\n //\n // A catch-all word, such as:\n //\n // black border-collapse\n //\n keyword: function () {\n const k = parserInput.$char('%') || parserInput.$re(/^\\[?(?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\\]?/);\n if (k) {\n return tree.Color.fromKeyword(k) || new(tree.Keyword)(k);\n }\n },\n\n //\n // A function call\n //\n // rgb(255, 0, 255)\n //\n // The arguments are parsed with the `entities.arguments` parser.\n //\n call: function () {\n let name;\n let args;\n let func;\n const index = parserInput.i;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (parserInput.peek(/^url\\(/i)) {\n return;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^([\\w-]+|%|progid:[\\w\\.]+)\\(/);\n if (!name) {\n parserInput.forget(); \n return;\n }\n\n name = name[1];\n func = this.customFuncCall(name);\n if (func) {\n args = func.parse();\n if (args && func.stop) {\n parserInput.forget();\n return args;\n }\n }\n\n args = this.arguments(args);\n\n if (!parserInput.$char(')')) {\n parserInput.restore('Could not parse call arguments or missing \\')\\'');\n return;\n }\n\n parserInput.forget();\n\n return new(tree.Call)(name, args, index, fileInfo);\n },\n \n //\n // Parsing rules for functions with non-standard args, e.g.:\n //\n // boolean(not(2 > 1))\n //\n // This is a quick prototype, to be modified/improved when\n // more custom-parsed funcs come (e.g. `selector(...)`)\n //\n\n customFuncCall: function (name) {\n /* Ideally the table is to be moved out of here for faster perf.,\n but it's quite tricky since it relies on all these `parsers`\n and `expect` available only here */\n return {\n alpha: f(parsers.ieAlpha, true),\n boolean: f(condition),\n 'if': f(condition)\n }[name.toLowerCase()];\n\n function f(parse, stop) {\n return {\n parse, // parsing function\n stop // when true - stop after parse() and return its result, \n // otherwise continue for plain args\n };\n }\n \n function condition() {\n return [expect(parsers.condition, 'expected condition')];\n }\n },\n\n arguments: function (prevArgs) {\n let argsComma = prevArgs || [];\n const argsSemiColon = [];\n let isSemiColonSeparated;\n let value;\n\n parserInput.save();\n\n while (true) {\n if (prevArgs) {\n prevArgs = false;\n } else {\n value = parsers.detachedRuleset() || this.assignment() || parsers.expression();\n if (!value) {\n break;\n }\n\n if (value.value && value.value.length == 1) {\n value = value.value[0];\n }\n\n argsComma.push(value);\n }\n\n if (parserInput.$char(',')) {\n continue;\n }\n\n if (parserInput.$char(';') || isSemiColonSeparated) {\n isSemiColonSeparated = true;\n value = (argsComma.length < 1) ? argsComma[0]\n : new tree.Value(argsComma);\n argsSemiColon.push(value);\n argsComma = [];\n }\n }\n\n parserInput.forget();\n return isSemiColonSeparated ? argsSemiColon : argsComma;\n },\n literal: function () {\n return this.dimension() ||\n this.color() ||\n this.quoted() ||\n this.unicodeDescriptor();\n },\n\n // Assignments are argument entities for calls.\n // They are present in ie filter properties as shown below.\n //\n // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )\n //\n\n assignment: function () {\n let key;\n let value;\n parserInput.save();\n key = parserInput.$re(/^\\w+(?=\\s?=)/i);\n if (!key) {\n parserInput.restore();\n return;\n }\n if (!parserInput.$char('=')) {\n parserInput.restore();\n return;\n }\n value = parsers.entity();\n if (value) {\n parserInput.forget();\n return new(tree.Assignment)(key, value);\n } else {\n parserInput.restore();\n }\n },\n\n //\n // Parse url() tokens\n //\n // We use a specific rule for urls, because they don't really behave like\n // standard function calls. The difference is that the argument doesn't have\n // to be enclosed within a string, so it can't be parsed as an Expression.\n //\n url: function () {\n let value;\n const index = parserInput.i;\n\n parserInput.autoCommentAbsorb = false;\n\n if (!parserInput.$str('url(')) {\n parserInput.autoCommentAbsorb = true;\n return;\n }\n\n value = this.quoted() || this.variable() || this.property() ||\n parserInput.$re(/^(?:(?:\\\\[\\(\\)'\"])|[^\\(\\)'\"])+/) || '';\n\n parserInput.autoCommentAbsorb = true;\n\n expectChar(')');\n\n return new(tree.URL)((value.value != null || \n value instanceof tree.Variable || \n value instanceof tree.Property) ?\n value : new(tree.Anonymous)(value, index), index, fileInfo);\n },\n\n //\n // A Variable entity, such as `@fink`, in\n //\n // width: @fink + 2px\n //\n // We use a different parser for variable definitions,\n // see `parsers.variable`.\n //\n variable: function () {\n let ch;\n let name;\n const index = parserInput.i;\n\n parserInput.save();\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\\w-]+/))) {\n ch = parserInput.currentChar();\n if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\\s/)) {\n // this may be a VariableCall lookup\n const result = parsers.variableCall(name);\n if (result) {\n parserInput.forget();\n return result;\n }\n }\n parserInput.forget();\n return new(tree.Variable)(name, index, fileInfo);\n }\n parserInput.restore();\n },\n\n // A variable entity using the protective {} e.g. @{var}\n variableCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\\{([\\w-]+)\\}/))) {\n return new(tree.Variable)(`@${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Property accessor, such as `$color`, in\n //\n // background-color: $color\n //\n property: function () {\n let name;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\\$[\\w-]+/))) {\n return new(tree.Property)(name, index, fileInfo);\n }\n },\n\n // A property entity useing the protective {} e.g. ${prop}\n propertyCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\\$\\{([\\w-]+)\\}/))) {\n return new(tree.Property)(`$${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Hexadecimal color\n //\n // #4F3C2F\n //\n // `rgb` and `hsl` colors are parsed through the `entities.call` parser.\n //\n color: function () {\n let rgb;\n parserInput.save();\n\n if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\\w.#\\[])?/))) {\n if (!rgb[2]) {\n parserInput.forget();\n return new(tree.Color)(rgb[1], undefined, rgb[0]);\n } \n }\n parserInput.restore();\n },\n\n colorKeyword: function () {\n parserInput.save();\n const autoCommentAbsorb = parserInput.autoCommentAbsorb;\n parserInput.autoCommentAbsorb = false;\n const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/);\n parserInput.autoCommentAbsorb = autoCommentAbsorb;\n if (!k) {\n parserInput.forget();\n return;\n }\n parserInput.restore();\n const color = tree.Color.fromKeyword(k);\n if (color) {\n parserInput.$str(k);\n return color;\n }\n },\n\n //\n // A Dimension, that is, a number and a unit\n //\n // 0.5em 95%\n //\n dimension: function () {\n if (parserInput.peekNotNumeric()) {\n return;\n }\n\n const value = parserInput.$re(/^([+-]?\\d*\\.?\\d+)(%|[a-z_]+)?/i);\n if (value) {\n return new(tree.Dimension)(value[1], value[2]);\n }\n },\n\n //\n // A unicode descriptor, as is used in unicode-range\n //\n // U+0?? or U+00A1-00A9\n //\n unicodeDescriptor: function () {\n let ud;\n\n ud = parserInput.$re(/^U\\+[0-9a-fA-F?]+(\\-[0-9a-fA-F?]+)?/);\n if (ud) {\n return new(tree.UnicodeDescriptor)(ud[0]);\n }\n },\n\n //\n // JavaScript code to be evaluated\n //\n // `window.location.href`\n //\n javascript: function () {\n let js;\n const index = parserInput.i;\n\n parserInput.save();\n\n const escape = parserInput.$char('~');\n const jsQuote = parserInput.$char('`');\n\n if (!jsQuote) {\n parserInput.restore();\n return;\n }\n\n js = parserInput.$re(/^[^`]*`/);\n if (js) {\n parserInput.forget();\n return new(tree.JavaScript)(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo);\n }\n parserInput.restore('invalid javascript definition');\n }\n },\n\n //\n // The variable part of a variable definition. Used in the `rule` parser\n //\n // @fink:\n //\n variable: function () {\n let name;\n\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\\w-]+)\\s*:/))) { return name[1]; }\n },\n\n //\n // Call a variable value to retrieve a detached ruleset\n // or a value from a detached ruleset's rules.\n //\n // @fink();\n // @fink;\n // color: @fink[@color];\n //\n variableCall: function (parsedName) {\n let lookups;\n let important;\n const i = parserInput.i;\n const inValue = !!parsedName;\n let name = parsedName;\n\n parserInput.save();\n\n if (name || (parserInput.currentChar() === '@'\n && (name = parserInput.$re(/^(@[\\w-]+)(\\(\\s*\\))?/)))) {\n\n lookups = this.mixin.ruleLookups();\n\n if (!lookups && ((inValue && parserInput.$str('()') !== '()') || (name[2] !== '()'))) {\n parserInput.restore('Missing \\'[...]\\' lookup in variable call');\n return;\n }\n\n if (!inValue) {\n name = name[1];\n }\n\n if (lookups && parsers.important()) {\n important = true;\n }\n\n const call = new tree.VariableCall(name, i, fileInfo);\n if (!inValue && parsers.end()) {\n parserInput.forget();\n return call;\n }\n else {\n parserInput.forget();\n return new tree.NamespaceValue(call, lookups, important, i, fileInfo);\n }\n }\n\n parserInput.restore();\n },\n\n //\n // extend syntax - used to extend selectors\n //\n extend: function(isRule) {\n let elements;\n let e;\n const index = parserInput.i;\n let option;\n let extendList;\n let extend;\n\n if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) {\n return;\n }\n\n do {\n option = null;\n elements = null;\n while (!(option = parserInput.$re(/^(all)(?=\\s*(\\)|,))/))) {\n e = this.element();\n if (!e) {\n break;\n }\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n }\n\n option = option && option[1];\n if (!elements) {\n error('Missing target selector for :extend().');\n }\n extend = new(tree.Extend)(new(tree.Selector)(elements), option, index, fileInfo);\n if (extendList) {\n extendList.push(extend);\n } else {\n extendList = [ extend ];\n }\n } while (parserInput.$char(','));\n\n expect(/^\\)/);\n\n if (isRule) {\n expect(/^;/);\n }\n\n return extendList;\n },\n\n //\n // extendRule - used in a rule to extend all the parent selectors\n //\n extendRule: function() {\n return this.extend(true);\n },\n\n //\n // Mixins\n //\n mixin: {\n //\n // A Mixin call, with an optional argument list\n //\n // #mixins > .square(#fff);\n // #mixins.square(#fff);\n // .rounded(4px, black);\n // .button;\n //\n // We can lookup / return a value using the lookup syntax:\n //\n // color: #mixin.square(#fff)[@color];\n //\n // The `while` loop is there because mixins can be\n // namespaced, but we only support the child and descendant\n // selector for now.\n //\n call: function (inValue, getLookup) {\n const s = parserInput.currentChar();\n let important = false;\n let lookups;\n const index = parserInput.i;\n let elements;\n let args;\n let hasParens;\n\n if (s !== '.' && s !== '#') { return; }\n\n parserInput.save(); // stop us absorbing part of an invalid selector\n\n elements = this.elements();\n\n if (elements) {\n if (parserInput.$char('(')) {\n args = this.args(true).args;\n expectChar(')');\n hasParens = true;\n }\n\n if (getLookup !== false) {\n lookups = this.ruleLookups();\n }\n if (getLookup === true && !lookups) {\n parserInput.restore();\n return;\n }\n\n if (inValue && !lookups && !hasParens) {\n // This isn't a valid in-value mixin call\n parserInput.restore();\n return;\n }\n\n if (!inValue && parsers.important()) {\n important = true;\n }\n\n if (inValue || parsers.end()) {\n parserInput.forget();\n const mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important);\n if (lookups) {\n return new tree.NamespaceValue(mixin, lookups, important);\n }\n else {\n return mixin;\n }\n }\n }\n\n parserInput.restore();\n },\n /**\n * Matching elements for mixins\n * (Start with . or # and can have > )\n */\n elements: function() {\n let elements;\n let e;\n let c;\n let elem;\n let elemIndex;\n const re = /^[#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/;\n while (true) {\n elemIndex = parserInput.i;\n e = parserInput.$re(re);\n \n if (!e) {\n break;\n }\n elem = new(tree.Element)(c, e, false, elemIndex, fileInfo);\n if (elements) {\n elements.push(elem);\n } else {\n elements = [ elem ];\n }\n c = parserInput.$char('>');\n }\n return elements;\n },\n args: function (isCall) {\n const entities = parsers.entities;\n const returner = { args:null, variadic: false };\n let expressions = [];\n const argsSemiColon = [];\n const argsComma = [];\n let isSemiColonSeparated;\n let expressionContainsNamed;\n let name;\n let nameLoop;\n let value;\n let arg;\n let expand;\n let hasSep = true;\n\n parserInput.save();\n\n while (true) {\n if (isCall) {\n arg = parsers.detachedRuleset() || parsers.expression();\n } else {\n parserInput.commentStore.length = 0;\n if (parserInput.$str('...')) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ variadic: true });\n break;\n }\n arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true);\n }\n\n if (!arg || !hasSep) {\n break;\n }\n\n nameLoop = null;\n if (arg.throwAwayComments) {\n arg.throwAwayComments();\n }\n value = arg;\n let val = null;\n\n if (isCall) {\n // Variable\n if (arg.value && arg.value.length == 1) {\n val = arg.value[0];\n }\n } else {\n val = arg;\n }\n\n if (val && (val instanceof tree.Variable || val instanceof tree.Property)) {\n if (parserInput.$char(':')) {\n if (expressions.length > 0) {\n if (isSemiColonSeparated) {\n error('Cannot mix ; and , as delimiter types');\n }\n expressionContainsNamed = true;\n }\n\n value = parsers.detachedRuleset() || parsers.expression();\n\n if (!value) {\n if (isCall) {\n error('could not understand value for named argument');\n } else {\n parserInput.restore();\n returner.args = [];\n return returner;\n }\n }\n nameLoop = (name = val.name);\n } else if (parserInput.$str('...')) {\n if (!isCall) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ name: arg.name, variadic: true });\n break;\n } else {\n expand = true;\n }\n } else if (!isCall) {\n name = nameLoop = val.name;\n value = null;\n }\n }\n\n if (value) {\n expressions.push(value);\n }\n\n argsComma.push({ name:nameLoop, value, expand });\n\n if (parserInput.$char(',')) {\n hasSep = true;\n continue;\n }\n hasSep = parserInput.$char(';') === ';';\n\n if (hasSep || isSemiColonSeparated) {\n\n if (expressionContainsNamed) {\n error('Cannot mix ; and , as delimiter types');\n }\n\n isSemiColonSeparated = true;\n\n if (expressions.length > 1) {\n value = new(tree.Value)(expressions);\n }\n argsSemiColon.push({ name, value, expand });\n\n name = null;\n expressions = [];\n expressionContainsNamed = false;\n }\n }\n\n parserInput.forget();\n returner.args = isSemiColonSeparated ? argsSemiColon : argsComma;\n return returner;\n },\n //\n // A Mixin definition, with a list of parameters\n //\n // .rounded (@radius: 2px, @color) {\n // ...\n // }\n //\n // Until we have a finer grained state-machine, we have to\n // do a look-ahead, to make sure we don't have a mixin call.\n // See the `rule` function for more information.\n //\n // We start by matching `.rounded (`, and then proceed on to\n // the argument list, which has optional default values.\n // We store the parameters in `params`, with a `value` key,\n // if there is a value, such as in the case of `@radius`.\n //\n // Once we've got our params list, and a closing `)`, we parse\n // the `{...}` block.\n //\n definition: function () {\n let name;\n let params = [];\n let match;\n let ruleset;\n let cond;\n let variadic = false;\n if ((parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#') ||\n parserInput.peek(/^[^{]*\\}/)) {\n return;\n }\n\n parserInput.save();\n\n match = parserInput.$re(/^([#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\\s*\\(/);\n if (match) {\n name = match[1];\n\n const argInfo = this.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n\n // .mixincall(\"@{a}\");\n // looks a bit like a mixin definition..\n // also\n // .mixincall(@a: {rule: set;});\n // so we have to be nice and restore\n if (!parserInput.$char(')')) {\n parserInput.restore('Missing closing \\')\\'');\n return;\n }\n\n parserInput.commentStore.length = 0;\n\n if (parserInput.$str('when')) { // Guard\n cond = expect(parsers.conditions, 'expected condition');\n }\n\n ruleset = parsers.block();\n\n if (ruleset) {\n parserInput.forget();\n return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);\n } else {\n parserInput.restore();\n }\n } else {\n parserInput.forget();\n }\n },\n \n ruleLookups: function() {\n let rule;\n let args;\n const lookups = [];\n\n if (parserInput.currentChar() !== '[') { \n return;\n }\n\n while (true) {\n parserInput.save();\n args = null;\n rule = this.lookupValue();\n if (!rule && rule !== '') {\n parserInput.restore();\n break;\n }\n lookups.push(rule);\n parserInput.forget();\n }\n if (lookups.length > 0) {\n return lookups;\n }\n },\n \n lookupValue: function() {\n parserInput.save();\n \n if (!parserInput.$char('[')) { \n parserInput.restore();\n return;\n }\n \n const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/);\n \n if (!parserInput.$char(']')) {\n parserInput.restore();\n return;\n } \n\n if (name || name === '') {\n parserInput.forget();\n return name;\n }\n \n parserInput.restore();\n }\n },\n //\n // Entities are the smallest recognized token,\n // and can be found inside a rule's value.\n //\n entity: function () {\n const entities = this.entities;\n\n return this.comment() || entities.literal() || entities.variable() || entities.url() ||\n entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) ||\n entities.javascript();\n },\n\n //\n // A Declaration terminator. Note that we use `peek()` to check for '}',\n // because the `block` rule will be expecting it, but we still need to make sure\n // it's there, if ';' was omitted.\n //\n end: function () {\n return parserInput.$char(';') || parserInput.peek('}');\n },\n\n //\n // IE's alpha function\n //\n // alpha(opacity=88)\n //\n ieAlpha: function () {\n let value;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (!parserInput.$re(/^opacity=/i)) { return; }\n value = parserInput.$re(/^\\d+/);\n if (!value) {\n value = expect(parsers.entities.variable, 'Could not parse alpha');\n value = `@{${value.name.slice(1)}}`;\n }\n expectChar(')');\n return new tree.Quoted('', `alpha(opacity=${value})`);\n },\n\n //\n // A Selector Element\n //\n // div\n // + h1\n // #socks\n // input[type=\"text\"]\n //\n // Elements are the building blocks for Selectors,\n // they are made out of a `Combinator` (see combinator rule),\n // and an element name, such as a tag a class, or `*`.\n //\n element: function () {\n let e;\n let c;\n let v;\n const index = parserInput.i;\n\n c = this.combinator();\n\n e = parserInput.$re(/^(?:\\d+\\.\\d+|\\d+)%/) ||\n parserInput.$re(/^(?:[.#]?|:*)(?:[\\w-]|[^\\x00-\\x9f]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||\n parserInput.$char('*') || parserInput.$char('&') || this.attribute() ||\n parserInput.$re(/^\\([^&()@]+\\)/) || parserInput.$re(/^[\\.#:](?=@)/) ||\n this.entities.variableCurly();\n\n if (!e) {\n parserInput.save();\n if (parserInput.$char('(')) {\n if ((v = this.selector(false)) && parserInput.$char(')')) {\n e = new(tree.Paren)(v);\n parserInput.forget();\n } else {\n parserInput.restore('Missing closing \\')\\'');\n }\n } else {\n parserInput.forget();\n }\n }\n\n if (e) { return new(tree.Element)(c, e, e instanceof tree.Variable, index, fileInfo); }\n },\n\n //\n // Combinators combine elements together, in a Selector.\n //\n // Because our parser isn't white-space sensitive, special care\n // has to be taken, when parsing the descendant combinator, ` `,\n // as it's an empty space. We have to check the previous character\n // in the input, to see if it's a ` ` character. More info on how\n // we deal with this in *combinator.js*.\n //\n combinator: function () {\n let c = parserInput.currentChar();\n\n if (c === '/') {\n parserInput.save();\n const slashedCombinator = parserInput.$re(/^\\/[a-z]+\\//i);\n if (slashedCombinator) {\n parserInput.forget();\n return new(tree.Combinator)(slashedCombinator);\n }\n parserInput.restore();\n }\n\n if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') {\n parserInput.i++;\n if (c === '^' && parserInput.currentChar() === '^') {\n c = '^^';\n parserInput.i++;\n }\n while (parserInput.isWhitespace()) { parserInput.i++; }\n return new(tree.Combinator)(c);\n } else if (parserInput.isWhitespace(-1)) {\n return new(tree.Combinator)(' ');\n } else {\n return new(tree.Combinator)(null);\n }\n },\n //\n // A CSS Selector\n // with less extensions e.g. the ability to extend and guard\n //\n // .class > div + h1\n // li a:hover\n //\n // Selectors are made out of one or more Elements, see above.\n //\n selector: function (isLess) {\n const index = parserInput.i;\n let elements;\n let extendList;\n let c;\n let e;\n let allExtends;\n let when;\n let condition;\n isLess = isLess !== false;\n while ((isLess && (extendList = this.extend())) || (isLess && (when = parserInput.$str('when'))) || (e = this.element())) {\n if (when) {\n condition = expect(this.conditions, 'expected condition');\n } else if (condition) {\n error('CSS guard can only be used at the end of selector');\n } else if (extendList) {\n if (allExtends) {\n allExtends = allExtends.concat(extendList);\n } else {\n allExtends = extendList;\n }\n } else {\n if (allExtends) { error('Extend can only be used at the end of selector'); }\n c = parserInput.currentChar();\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n e = null;\n }\n if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') {\n break;\n }\n }\n\n if (elements) { return new(tree.Selector)(elements, allExtends, condition, index, fileInfo); }\n if (allExtends) { error('Extend must be used to extend a selector, it cannot be used on its own'); }\n },\n selectors: function () {\n let s;\n let selectors;\n while (true) {\n s = this.selector();\n if (!s) {\n break;\n }\n if (selectors) {\n selectors.push(s);\n } else {\n selectors = [ s ];\n }\n parserInput.commentStore.length = 0;\n if (s.condition && selectors.length > 1) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n if (!parserInput.$char(',')) { break; }\n if (s.condition) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n parserInput.commentStore.length = 0;\n }\n return selectors;\n },\n attribute: function () {\n if (!parserInput.$char('[')) { return; }\n\n const entities = this.entities;\n let key;\n let val;\n let op;\n\n if (!(key = entities.variableCurly())) {\n key = expect(/^(?:[_A-Za-z0-9-\\*]*\\|)?(?:[_A-Za-z0-9-]|\\\\.)+/);\n }\n\n op = parserInput.$re(/^[|~*$^]?=/);\n if (op) {\n val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\\w-]+/) || entities.variableCurly();\n }\n\n expectChar(']');\n\n return new(tree.Attribute)(key, op, val);\n },\n\n //\n // The `block` rule is used by `ruleset` and `mixin.definition`.\n // It's a wrapper around the `primary` rule, with added `{}`.\n //\n block: function () {\n let content;\n if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) {\n return content;\n }\n },\n\n blockRuleset: function() {\n let block = this.block();\n\n if (block) {\n block = new tree.Ruleset(null, block);\n }\n return block;\n },\n\n detachedRuleset: function() {\n let argInfo;\n let params;\n let variadic;\n\n parserInput.save();\n if (parserInput.$re(/^[.#]\\(/)) {\n /**\n * DR args currently only implemented for each() function, and not \n * yet settable as `@dr: #(@arg) {}`\n * This should be done when DRs are merged with mixins.\n * See: https://github.com/less/less-meta/issues/16\n */\n argInfo = this.mixin.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return;\n }\n }\n const blockRuleset = this.blockRuleset();\n if (blockRuleset) {\n parserInput.forget();\n if (params) {\n return new tree.mixin.Definition(null, params, blockRuleset, null, variadic);\n }\n return new tree.DetachedRuleset(blockRuleset);\n }\n parserInput.restore();\n },\n\n //\n // div, .class, body > p {...}\n //\n ruleset: function () {\n let selectors;\n let rules;\n let debugInfo;\n\n parserInput.save();\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(parserInput.i);\n }\n\n selectors = this.selectors();\n\n if (selectors && (rules = this.block())) {\n parserInput.forget();\n const ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports);\n if (context.dumpLineNumbers) {\n ruleset.debugInfo = debugInfo;\n }\n return ruleset;\n } else {\n parserInput.restore();\n }\n },\n declaration: function () {\n let name;\n let value;\n const index = parserInput.i;\n let hasDR;\n const c = parserInput.currentChar();\n let important;\n let merge;\n let isVariable;\n\n if (c === '.' || c === '#' || c === '&' || c === ':') { return; }\n\n parserInput.save();\n\n name = this.variable() || this.ruleProperty();\n if (name) {\n isVariable = typeof name === 'string';\n\n if (isVariable) {\n value = this.detachedRuleset();\n if (value) {\n hasDR = true;\n }\n }\n\n parserInput.commentStore.length = 0;\n if (!value) {\n // a name returned by this.ruleProperty() is always an array of the form:\n // [string-1, ..., string-n, \"\"] or [string-1, ..., string-n, \"+\"]\n // where each item is a tree.Keyword or tree.Variable\n merge = !isVariable && name.length > 1 && name.pop().value;\n\n // Custom property values get permissive parsing\n if (name[0].value && name[0].value.slice(0, 2) === '--') {\n value = this.permissiveValue();\n }\n // Try to store values as anonymous\n // If we need the value later we'll re-parse it in ruleset.parseValue\n else {\n value = this.anonymousValue();\n }\n if (value) {\n parserInput.forget();\n // anonymous values absorb the end ';' which is required for them to work\n return new(tree.Declaration)(name, value, false, merge, index, fileInfo);\n }\n\n if (!value) {\n value = this.value();\n }\n\n if (value) {\n important = this.important();\n } else if (isVariable) {\n // As a last resort, try permissiveValue\n value = this.permissiveValue();\n }\n }\n\n if (value && (this.end() || hasDR)) {\n parserInput.forget();\n return new(tree.Declaration)(name, value, important, merge, index, fileInfo);\n }\n else {\n parserInput.restore();\n }\n } else {\n parserInput.restore();\n }\n },\n anonymousValue: function () {\n const index = parserInput.i;\n const match = parserInput.$re(/^([^.#@\\$+\\/'\"*`(;{}-]*);/);\n if (match) {\n return new(tree.Anonymous)(match[1], index);\n }\n },\n /**\n * Used for custom properties, at-rules, and variables (as fallback)\n * Parses almost anything inside of {} [] () \"\" blocks\n * until it reaches outer-most tokens.\n * \n * First, it will try to parse comments and entities to reach\n * the end. This is mostly like the Expression parser except no\n * math is allowed.\n */\n permissiveValue: function (untilTokens) {\n let i;\n let e;\n let done;\n let value;\n const tok = untilTokens || ';';\n const index = parserInput.i;\n const result = [];\n\n function testCurrentChar() {\n const char = parserInput.currentChar();\n if (typeof tok === 'string') {\n return char === tok;\n } else {\n return tok.test(char);\n }\n }\n if (testCurrentChar()) {\n return;\n }\n value = [];\n do {\n e = this.comment();\n if (e) {\n value.push(e);\n continue;\n }\n e = this.entity();\n if (e) {\n value.push(e);\n }\n } while (e);\n\n done = testCurrentChar();\n\n if (value.length > 0) {\n value = new(tree.Expression)(value);\n if (done) {\n return value;\n }\n else {\n result.push(value);\n }\n // Preserve space before $parseUntil as it will not\n if (parserInput.prevChar() === ' ') {\n result.push(new tree.Anonymous(' ', index));\n }\n }\n parserInput.save();\n\n value = parserInput.$parseUntil(tok);\n\n if (value) {\n if (typeof value === 'string') {\n error(`Expected '${value}'`, 'Parse');\n }\n if (value.length === 1 && value[0] === ' ') {\n parserInput.forget();\n return new tree.Anonymous('', index);\n }\n let item;\n for (i = 0; i < value.length; i++) {\n item = value[i];\n if (Array.isArray(item)) {\n // Treat actual quotes as normal quoted values\n result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo));\n }\n else {\n if (i === value.length - 1) {\n item = item.trim();\n }\n // Treat like quoted values, but replace vars like unquoted expressions\n const quote = new tree.Quoted('\\'', item, true, index, fileInfo);\n quote.variableRegex = /@([\\w-]+)/g;\n quote.propRegex = /\\$([\\w-]+)/g;\n result.push(quote);\n }\n }\n parserInput.forget();\n return new tree.Expression(result, true);\n }\n parserInput.restore();\n },\n\n //\n // An @import atrule\n //\n // @import \"lib\";\n //\n // Depending on our environment, importing is done differently:\n // In the browser, it's an XHR request, in Node, it would be a\n // file-system operation. The function used for importing is\n // stored in `import`, which we pass to the Import constructor.\n //\n 'import': function () {\n let path;\n let features;\n const index = parserInput.i;\n\n const dir = parserInput.$re(/^@import?\\s+/);\n\n if (dir) {\n const options = (dir ? this.importOptions() : null) || {};\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n features = this.mediaFeatures();\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon or unrecognised media features on import');\n }\n features = features && new(tree.Value)(features);\n return new(tree.Import)(path, features, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed import statement');\n }\n }\n },\n\n importOptions: function() {\n let o;\n const options = {};\n let optionName;\n let value;\n\n // list of options, surrounded by parens\n if (!parserInput.$char('(')) { return null; }\n do {\n o = this.importOption();\n if (o) {\n optionName = o;\n value = true;\n switch (optionName) {\n case 'css':\n optionName = 'less';\n value = false;\n break;\n case 'once':\n optionName = 'multiple';\n value = false;\n break;\n }\n options[optionName] = value;\n if (!parserInput.$char(',')) { break; }\n }\n } while (o);\n expectChar(')');\n return options;\n },\n\n importOption: function() {\n const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/);\n if (opt) {\n return opt[1];\n }\n },\n\n mediaFeature: function () {\n const entities = this.entities;\n const nodes = [];\n let e;\n let p;\n parserInput.save();\n do {\n e = entities.keyword() || entities.variable() || entities.mixinLookup();\n if (e) {\n nodes.push(e);\n } else if (parserInput.$char('(')) {\n p = this.property();\n e = this.value();\n if (parserInput.$char(')')) {\n if (p && e) {\n nodes.push(new(tree.Paren)(new(tree.Declaration)(p, e, null, null, parserInput.i, fileInfo, true)));\n } else if (e) {\n nodes.push(new(tree.Paren)(e));\n } else {\n error('badly formed media feature definition');\n }\n } else {\n error('Missing closing \\')\\'', 'Parse');\n }\n }\n } while (e);\n\n parserInput.forget();\n if (nodes.length > 0) {\n return new(tree.Expression)(nodes);\n }\n },\n\n mediaFeatures: function () {\n const entities = this.entities;\n const features = [];\n let e;\n do {\n e = this.mediaFeature();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n } else {\n e = entities.variable() || entities.mixinLookup();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n }\n } while (e);\n\n return features.length > 0 ? features : null;\n },\n\n media: function () {\n let features;\n let rules;\n let media;\n let debugInfo;\n const index = parserInput.i;\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(index);\n }\n\n parserInput.save();\n\n if (parserInput.$str('@media')) {\n features = this.mediaFeatures();\n\n rules = this.block();\n\n if (!rules) {\n error('media definitions require block statements after any features');\n }\n\n parserInput.forget();\n\n media = new(tree.Media)(rules, features, index, fileInfo);\n if (context.dumpLineNumbers) {\n media.debugInfo = debugInfo;\n }\n\n return media;\n }\n\n parserInput.restore();\n },\n\n //\n\n // A @plugin directive, used to import plugins dynamically.\n //\n // @plugin (args) \"lib\";\n //\n plugin: function () {\n let path;\n let args;\n let options;\n const index = parserInput.i;\n const dir = parserInput.$re(/^@plugin?\\s+/);\n\n if (dir) {\n args = this.pluginArgs();\n\n if (args) {\n options = {\n pluginArgs: args,\n isPlugin: true\n };\n }\n else {\n options = { isPlugin: true };\n }\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon on @plugin');\n }\n return new(tree.Import)(path, null, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed @plugin statement');\n }\n }\n },\n\n pluginArgs: function() {\n // list of options, surrounded by parens\n parserInput.save();\n if (!parserInput.$char('(')) {\n parserInput.restore();\n return null;\n }\n const args = parserInput.$re(/^\\s*([^\\);]+)\\)\\s*/);\n if (args[1]) {\n parserInput.forget();\n return args[1].trim();\n }\n else { \n parserInput.restore();\n return null;\n }\n },\n\n //\n // A CSS AtRule\n //\n // @charset \"utf-8\";\n //\n atrule: function () {\n const index = parserInput.i;\n let name;\n let value;\n let rules;\n let nonVendorSpecificName;\n let hasIdentifier;\n let hasExpression;\n let hasUnknown;\n let hasBlock = true;\n let isRooted = true;\n\n if (parserInput.currentChar() !== '@') { return; }\n\n value = this['import']() || this.plugin() || this.media();\n if (value) {\n return value;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^@[a-z-]+/);\n\n if (!name) { return; }\n\n nonVendorSpecificName = name;\n if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {\n nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`;\n }\n\n switch (nonVendorSpecificName) {\n case '@charset':\n hasIdentifier = true;\n hasBlock = false;\n break;\n case '@namespace':\n hasExpression = true;\n hasBlock = false;\n break;\n case '@keyframes':\n case '@counter-style':\n hasIdentifier = true;\n break;\n case '@document':\n case '@supports':\n hasUnknown = true;\n isRooted = false;\n break;\n default:\n hasUnknown = true;\n break;\n }\n\n parserInput.commentStore.length = 0;\n\n if (hasIdentifier) {\n value = this.entity();\n if (!value) {\n error(`expected ${name} identifier`);\n }\n } else if (hasExpression) {\n value = this.expression();\n if (!value) {\n error(`expected ${name} expression`);\n }\n } else if (hasUnknown) {\n value = this.permissiveValue(/^[{;]/);\n hasBlock = (parserInput.currentChar() === '{');\n if (!value) {\n if (!hasBlock && parserInput.currentChar() !== ';') {\n error(`${name} rule is missing block or ending semi-colon`);\n }\n }\n else if (!value.value) {\n value = null;\n }\n }\n\n if (hasBlock) {\n rules = this.blockRuleset();\n }\n\n if (rules || (!hasBlock && value && parserInput.$char(';'))) {\n parserInput.forget();\n return new(tree.AtRule)(name, value, rules, index, fileInfo,\n context.dumpLineNumbers ? getDebugInfo(index) : null,\n isRooted\n );\n }\n\n parserInput.restore('at-rule options not recognised');\n },\n\n //\n // A Value is a comma-delimited list of Expressions\n //\n // font-family: Baskerville, Georgia, serif;\n //\n // In a Rule, a Value represents everything after the `:`,\n // and before the `;`.\n //\n value: function () {\n let e;\n const expressions = [];\n const index = parserInput.i;\n\n do {\n e = this.expression();\n if (e) {\n expressions.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n } while (e);\n\n if (expressions.length > 0) {\n return new(tree.Value)(expressions, index);\n }\n },\n important: function () {\n if (parserInput.currentChar() === '!') {\n return parserInput.$re(/^! *important/);\n }\n },\n sub: function () {\n let a;\n let e;\n\n parserInput.save();\n if (parserInput.$char('(')) {\n a = this.addition();\n if (a && parserInput.$char(')')) {\n parserInput.forget();\n e = new(tree.Expression)([a]);\n e.parens = true;\n return e;\n }\n parserInput.restore('Expected \\')\\'');\n return;\n }\n parserInput.restore();\n },\n multiplication: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.operand();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n if (parserInput.peek(/^\\/[*\\/]/)) {\n break;\n }\n\n parserInput.save();\n\n op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./');\n\n if (!op) { parserInput.forget(); break; }\n\n a = this.operand();\n\n if (!a) { parserInput.restore(); break; }\n parserInput.forget();\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n addition: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.multiplication();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n op = parserInput.$re(/^[-+]\\s+/) || (!isSpaced && (parserInput.$char('+') || parserInput.$char('-')));\n if (!op) {\n break;\n }\n a = this.multiplication();\n if (!a) {\n break;\n }\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n conditions: function () {\n let a;\n let b;\n const index = parserInput.i;\n let condition;\n\n a = this.condition(true);\n if (a) {\n while (true) {\n if (!parserInput.peek(/^,\\s*(not\\s*)?\\(/) || !parserInput.$char(',')) {\n break;\n }\n b = this.condition(true);\n if (!b) {\n break;\n }\n condition = new(tree.Condition)('or', condition || a, b, index);\n }\n return condition || a;\n }\n },\n condition: function (needsParens) {\n let result;\n let logical;\n let next;\n function or() {\n return parserInput.$str('or');\n }\n\n result = this.conditionAnd(needsParens);\n if (!result) {\n return ;\n }\n logical = or();\n if (logical) {\n next = this.condition(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n conditionAnd: function (needsParens) {\n let result;\n let logical;\n let next;\n const self = this;\n function insideCondition() {\n const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens);\n if (!cond && !needsParens) {\n return self.atomicCondition(needsParens);\n }\n return cond;\n }\n function and() {\n return parserInput.$str('and');\n }\n\n result = insideCondition();\n if (!result) {\n return ;\n }\n logical = and();\n if (logical) {\n next = this.conditionAnd(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n negatedCondition: function (needsParens) {\n if (parserInput.$str('not')) {\n const result = this.parenthesisCondition(needsParens);\n if (result) {\n result.negate = !result.negate;\n }\n return result;\n }\n },\n parenthesisCondition: function (needsParens) {\n function tryConditionFollowedByParenthesis(me) {\n let body;\n parserInput.save();\n body = me.condition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return ;\n }\n parserInput.forget();\n return body;\n }\n\n let body;\n parserInput.save();\n if (!parserInput.$str('(')) {\n parserInput.restore();\n return ;\n }\n body = tryConditionFollowedByParenthesis(this);\n if (body) {\n parserInput.forget();\n return body;\n }\n\n body = this.atomicCondition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`);\n return ;\n }\n parserInput.forget();\n return body;\n },\n atomicCondition: function (needsParens) {\n const entities = this.entities;\n const index = parserInput.i;\n let a;\n let b;\n let c;\n let op;\n\n function cond() {\n return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup();\n }\n cond = cond.bind(this);\n\n a = cond();\n if (a) {\n if (parserInput.$char('>')) {\n if (parserInput.$char('=')) {\n op = '>=';\n } else {\n op = '>';\n }\n } else\n if (parserInput.$char('<')) {\n if (parserInput.$char('=')) {\n op = '<=';\n } else {\n op = '<';\n }\n } else\n if (parserInput.$char('=')) {\n if (parserInput.$char('>')) {\n op = '=>';\n } else if (parserInput.$char('<')) {\n op = '=<';\n } else {\n op = '=';\n }\n }\n if (op) {\n b = cond();\n if (b) {\n c = new(tree.Condition)(op, a, b, index, false);\n } else {\n error('expected expression');\n }\n } else {\n c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, false);\n }\n return c;\n }\n },\n\n //\n // An operand is anything that can be part of an operation,\n // such as a Color, or a Variable\n //\n operand: function () {\n const entities = this.entities;\n let negate;\n\n if (parserInput.peek(/^-[@\\$\\(]/)) {\n negate = parserInput.$char('-');\n }\n\n let o = this.sub() || entities.dimension() ||\n entities.color() || entities.variable() ||\n entities.property() || entities.call() ||\n entities.quoted(true) || entities.colorKeyword() ||\n entities.mixinLookup();\n\n if (negate) {\n o.parensInOp = true;\n o = new(tree.Negative)(o);\n }\n\n return o;\n },\n\n //\n // Expressions either represent mathematical operations,\n // or white-space delimited Entities.\n //\n // 1px solid black\n // @var * 2\n //\n expression: function () {\n const entities = [];\n let e;\n let delim;\n const index = parserInput.i;\n\n do {\n e = this.comment();\n if (e) {\n entities.push(e);\n continue;\n }\n e = this.addition() || this.entity();\n if (e) {\n entities.push(e);\n // operations do not allow keyword \"/\" dimension (e.g. small/20px) so we support that here\n if (!parserInput.peek(/^\\/[\\/*]/)) {\n delim = parserInput.$char('/');\n if (delim) {\n entities.push(new(tree.Anonymous)(delim, index));\n }\n }\n }\n } while (e);\n if (entities.length > 0) {\n return new(tree.Expression)(entities);\n }\n },\n property: function () {\n const name = parserInput.$re(/^(\\*?-?[_a-zA-Z0-9-]+)\\s*:/);\n if (name) {\n return name[1];\n }\n },\n ruleProperty: function () {\n let name = [];\n const index = [];\n let s;\n let k;\n\n parserInput.save();\n\n const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\\s*:/);\n if (simpleProperty) {\n name = [new(tree.Keyword)(simpleProperty[1])];\n parserInput.forget();\n return name;\n }\n\n function match(re) {\n const i = parserInput.i;\n const chunk = parserInput.$re(re);\n if (chunk) {\n index.push(i);\n return name.push(chunk[1]);\n }\n }\n\n match(/^(\\*?)/);\n while (true) {\n if (!match(/^((?:[\\w-]+)|(?:[@\\$]\\{[\\w-]+\\}))/)) {\n break;\n }\n }\n\n if ((name.length > 1) && match(/^((?:\\+_|\\+)?)\\s*:/)) {\n parserInput.forget();\n\n // at last, we have the complete match now. move forward,\n // convert name particles to tree objects and return:\n if (name[0] === '') {\n name.shift();\n index.shift();\n }\n for (k = 0; k < name.length; k++) {\n s = name[k];\n name[k] = (s.charAt(0) !== '@' && s.charAt(0) !== '$') ?\n new(tree.Keyword)(s) :\n (s.charAt(0) === '@' ?\n new(tree.Variable)(`@${s.slice(2, -1)}`, index[k], fileInfo) :\n new(tree.Property)(`$${s.slice(2, -1)}`, index[k], fileInfo));\n }\n return name;\n }\n parserInput.restore();\n }\n }\n };\n};\nParser.serializeVars = vars => {\n let s = '';\n\n for (const name in vars) {\n if (Object.hasOwnProperty.call(vars, name)) {\n const value = vars[name];\n s += `${((name[0] === '@') ? '' : '@') + name}: ${value}${(String(value).slice(-1) === ';') ? '' : ';'}`;\n }\n }\n\n return s;\n};\n\nexport default Parser;\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nlet colorFunctions;\n\nfunction clamp(val) {\n return Math.min(1, Math.max(0, val));\n}\nfunction hsla(origColor, hsl) {\n const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a);\n if (color) {\n if (origColor.value && \n /^(rgb|hsl)/.test(origColor.value)) {\n color.value = origColor.value;\n } else {\n color.value = 'rgb';\n }\n return color;\n }\n}\nfunction toHSL(color) {\n if (color.toHSL) {\n return color.toHSL();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction toHSV(color) {\n if (color.toHSV) {\n return color.toHSV();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction number(n) {\n if (n instanceof Dimension) {\n return parseFloat(n.unit.is('%') ? n.value / 100 : n.value);\n } else if (typeof n === 'number') {\n return n;\n } else {\n throw {\n type: 'Argument',\n message: 'color functions take numbers as parameters'\n };\n }\n}\nfunction scaled(n, size) {\n if (n instanceof Dimension && n.unit.is('%')) {\n return parseFloat(n.value * size / 100);\n } else {\n return number(n);\n }\n}\ncolorFunctions = {\n rgb: function (r, g, b) {\n const color = colorFunctions.rgba(r, g, b, 1.0);\n if (color) {\n color.value = 'rgb';\n return color;\n }\n },\n rgba: function (r, g, b, a) {\n try {\n if (r instanceof Color) {\n if (g) {\n a = number(g);\n } else {\n a = r.alpha;\n }\n return new Color(r.rgb, a, 'rgba');\n }\n const rgb = [r, g, b].map(c => scaled(c, 255));\n a = number(a);\n return new Color(rgb, a, 'rgba');\n }\n catch (e) {}\n },\n hsl: function (h, s, l) {\n const color = colorFunctions.hsla(h, s, l, 1.0);\n if (color) {\n color.value = 'hsl';\n return color;\n }\n },\n hsla: function (h, s, l, a) {\n try {\n if (h instanceof Color) {\n if (s) {\n a = number(s);\n } else {\n a = h.alpha;\n }\n return new Color(h.rgb, a, 'hsla');\n }\n\n let m1;\n let m2;\n\n function hue(h) {\n h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);\n if (h * 6 < 1) {\n return m1 + (m2 - m1) * h * 6;\n }\n else if (h * 2 < 1) {\n return m2;\n }\n else if (h * 3 < 2) {\n return m1 + (m2 - m1) * (2 / 3 - h) * 6;\n }\n else {\n return m1;\n }\n }\n\n h = (number(h) % 360) / 360;\n s = clamp(number(s));l = clamp(number(l));a = clamp(number(a));\n\n m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;\n m1 = l * 2 - m2;\n\n const rgb = [\n hue(h + 1 / 3) * 255,\n hue(h) * 255,\n hue(h - 1 / 3) * 255\n ];\n a = number(a);\n return new Color(rgb, a, 'hsla');\n }\n catch (e) {}\n },\n\n hsv: function(h, s, v) {\n return colorFunctions.hsva(h, s, v, 1.0);\n },\n\n hsva: function(h, s, v, a) {\n h = ((number(h) % 360) / 360) * 360;\n s = number(s);v = number(v);a = number(a);\n\n let i;\n let f;\n i = Math.floor((h / 60) % 6);\n f = (h / 60) - i;\n\n const vs = [v,\n v * (1 - s),\n v * (1 - f * s),\n v * (1 - (1 - f) * s)];\n const perm = [[0, 3, 1],\n [2, 0, 1],\n [1, 0, 3],\n [1, 2, 0],\n [3, 1, 0],\n [0, 1, 2]];\n\n return colorFunctions.rgba(vs[perm[i][0]] * 255,\n vs[perm[i][1]] * 255,\n vs[perm[i][2]] * 255,\n a);\n },\n\n hue: function (color) {\n return new Dimension(toHSL(color).h);\n },\n saturation: function (color) {\n return new Dimension(toHSL(color).s * 100, '%');\n },\n lightness: function (color) {\n return new Dimension(toHSL(color).l * 100, '%');\n },\n hsvhue: function(color) {\n return new Dimension(toHSV(color).h);\n },\n hsvsaturation: function (color) {\n return new Dimension(toHSV(color).s * 100, '%');\n },\n hsvvalue: function (color) {\n return new Dimension(toHSV(color).v * 100, '%');\n },\n red: function (color) {\n return new Dimension(color.rgb[0]);\n },\n green: function (color) {\n return new Dimension(color.rgb[1]);\n },\n blue: function (color) {\n return new Dimension(color.rgb[2]);\n },\n alpha: function (color) {\n return new Dimension(toHSL(color).a);\n },\n luma: function (color) {\n return new Dimension(color.luma() * color.alpha * 100, '%');\n },\n luminance: function (color) {\n const luminance =\n (0.2126 * color.rgb[0] / 255) +\n (0.7152 * color.rgb[1] / 255) +\n (0.0722 * color.rgb[2] / 255);\n\n return new Dimension(luminance * color.alpha * 100, '%');\n },\n saturate: function (color, amount, method) {\n // filter: saturate(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s += hsl.s * amount.value / 100;\n }\n else {\n hsl.s += amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n desaturate: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s -= hsl.s * amount.value / 100;\n }\n else {\n hsl.s -= amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n lighten: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l += hsl.l * amount.value / 100;\n }\n else {\n hsl.l += amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n darken: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l -= hsl.l * amount.value / 100;\n }\n else {\n hsl.l -= amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n fadein: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a += hsl.a * amount.value / 100;\n }\n else {\n hsl.a += amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fadeout: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a -= hsl.a * amount.value / 100;\n }\n else {\n hsl.a -= amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fade: function (color, amount) {\n const hsl = toHSL(color);\n\n hsl.a = amount.value / 100;\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n spin: function (color, amount) {\n const hsl = toHSL(color);\n const hue = (hsl.h + amount.value) % 360;\n\n hsl.h = hue < 0 ? 360 + hue : hue;\n\n return hsla(color, hsl);\n },\n //\n // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein\n // http://sass-lang.com\n //\n mix: function (color1, color2, weight) {\n if (!weight) {\n weight = new Dimension(50);\n }\n const p = weight.value / 100.0;\n const w = p * 2 - 1;\n const a = toHSL(color1).a - toHSL(color2).a;\n\n const w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;\n const w2 = 1 - w1;\n\n const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,\n color1.rgb[1] * w1 + color2.rgb[1] * w2,\n color1.rgb[2] * w1 + color2.rgb[2] * w2];\n\n const alpha = color1.alpha * p + color2.alpha * (1 - p);\n\n return new Color(rgb, alpha);\n },\n greyscale: function (color) {\n return colorFunctions.desaturate(color, new Dimension(100));\n },\n contrast: function (color, dark, light, threshold) {\n // filter: contrast(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n if (typeof light === 'undefined') {\n light = colorFunctions.rgba(255, 255, 255, 1.0);\n }\n if (typeof dark === 'undefined') {\n dark = colorFunctions.rgba(0, 0, 0, 1.0);\n }\n // Figure out which is actually light and dark:\n if (dark.luma() > light.luma()) {\n const t = light;\n light = dark;\n dark = t;\n }\n if (typeof threshold === 'undefined') {\n threshold = 0.43;\n } else {\n threshold = number(threshold);\n }\n if (color.luma() < threshold) {\n return light;\n } else {\n return dark;\n }\n },\n // Changes made in 2.7.0 - Reverted in 3.0.0\n // contrast: function (color, color1, color2, threshold) {\n // // Return which of `color1` and `color2` has the greatest contrast with `color`\n // // according to the standard WCAG contrast ratio calculation.\n // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef\n // // The threshold param is no longer used, in line with SASS.\n // // filter: contrast(3.2);\n // // should be kept as is, so check for color\n // if (!color.rgb) {\n // return null;\n // }\n // if (typeof color1 === 'undefined') {\n // color1 = colorFunctions.rgba(0, 0, 0, 1.0);\n // }\n // if (typeof color2 === 'undefined') {\n // color2 = colorFunctions.rgba(255, 255, 255, 1.0);\n // }\n // var contrast1, contrast2;\n // var luma = color.luma();\n // var luma1 = color1.luma();\n // var luma2 = color2.luma();\n // // Calculate contrast ratios for each color\n // if (luma > luma1) {\n // contrast1 = (luma + 0.05) / (luma1 + 0.05);\n // } else {\n // contrast1 = (luma1 + 0.05) / (luma + 0.05);\n // }\n // if (luma > luma2) {\n // contrast2 = (luma + 0.05) / (luma2 + 0.05);\n // } else {\n // contrast2 = (luma2 + 0.05) / (luma + 0.05);\n // }\n // if (contrast1 > contrast2) {\n // return color1;\n // } else {\n // return color2;\n // }\n // },\n argb: function (color) {\n return new Anonymous(color.toARGB());\n },\n color: function(c) {\n if ((c instanceof Quoted) &&\n (/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value))) {\n const val = c.value.slice(1);\n return new Color(val, undefined, `#${val}`);\n }\n if ((c instanceof Color) || (c = Color.fromKeyword(c.value))) {\n c.value = undefined;\n return c;\n }\n throw {\n type: 'Argument',\n message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF'\n };\n },\n tint: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount);\n },\n shade: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount);\n }\n};\n\nexport default colorFunctions;\n","import Anonymous from '../tree/anonymous';\nimport Keyword from '../tree/keyword';\n\nfunction boolean(condition) {\n return condition ? Keyword.True : Keyword.False;\n}\n\nfunction If(condition, trueValue, falseValue) {\n return condition ? trueValue\n : (falseValue || new Anonymous);\n}\n\nexport default { boolean, 'if': If };\n","import Color from '../tree/color';\n\n// Color Blending\n// ref: http://www.w3.org/TR/compositing-1\n\nfunction colorBlend(mode, color1, color2) {\n const ab = color1.alpha; // result\n\n let // backdrop\n cb;\n\n const as = color2.alpha;\n\n let // source\n cs;\n\n let ar;\n let cr;\n const r = [];\n\n ar = as + ab * (1 - as);\n for (let i = 0; i < 3; i++) {\n cb = color1.rgb[i] / 255;\n cs = color2.rgb[i] / 255;\n cr = mode(cb, cs);\n if (ar) {\n cr = (as * cs + ab * (cb -\n as * (cb + cs - cr))) / ar;\n }\n r[i] = cr * 255;\n }\n\n return new Color(r, ar);\n}\n\nconst colorBlendModeFunctions = {\n multiply: function(cb, cs) {\n return cb * cs;\n },\n screen: function(cb, cs) {\n return cb + cs - cb * cs;\n },\n overlay: function(cb, cs) {\n cb *= 2;\n return (cb <= 1) ?\n colorBlendModeFunctions.multiply(cb, cs) :\n colorBlendModeFunctions.screen(cb - 1, cs);\n },\n softlight: function(cb, cs) {\n let d = 1;\n let e = cb;\n if (cs > 0.5) {\n e = 1;\n d = (cb > 0.25) ? Math.sqrt(cb)\n : ((16 * cb - 12) * cb + 4) * cb;\n }\n return cb - (1 - 2 * cs) * e * (d - cb);\n },\n hardlight: function(cb, cs) {\n return colorBlendModeFunctions.overlay(cs, cb);\n },\n difference: function(cb, cs) {\n return Math.abs(cb - cs);\n },\n exclusion: function(cb, cs) {\n return cb + cs - 2 * cb * cs;\n },\n\n // non-w3c functions:\n average: function(cb, cs) {\n return (cb + cs) / 2;\n },\n negation: function(cb, cs) {\n return 1 - Math.abs(cb + cs - 1);\n }\n};\n\nfor (const f in colorBlendModeFunctions) {\n if (colorBlendModeFunctions.hasOwnProperty(f)) {\n colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]);\n }\n}\n\nexport default colorBlend;\n","import Comment from '../tree/comment';\nimport Dimension from '../tree/dimension';\nimport Declaration from '../tree/declaration';\nimport Expression from '../tree/expression';\nimport Ruleset from '../tree/ruleset';\nimport Selector from '../tree/selector';\nimport Element from '../tree/element';\nimport Quote from '../tree/quoted';\n\nconst getItemsFromNode = node => {\n // handle non-array values as an array of length 1\n // return 'undefined' if index is invalid\n const items = Array.isArray(node.value) ?\n node.value : Array(node);\n\n return items;\n};\n\nexport default {\n _SELF: function(n) {\n return n;\n },\n extract: function(values, index) {\n index = index.value - 1; // (1-based index)\n\n return getItemsFromNode(values)[index];\n },\n length: function(values) {\n return new Dimension(getItemsFromNode(values).length);\n },\n /**\n * Creates a Less list of incremental values.\n * Modeled after Lodash's range function, also exists natively in PHP\n * \n * @param {Dimension} [start=1]\n * @param {Dimension} end - e.g. 10 or 10px - unit is added to output\n * @param {Dimension} [step=1] \n */\n range: function(start, end, step) {\n let from;\n let to;\n let stepValue = 1;\n const list = [];\n if (end) {\n to = end;\n from = start.value;\n if (step) {\n stepValue = step.value;\n }\n }\n else {\n from = 1;\n to = start;\n }\n\n for (let i = from; i <= to.value; i += stepValue) {\n list.push(new Dimension(i, to.unit));\n }\n\n return new Expression(list);\n },\n each: function(list, rs) {\n const rules = [];\n let newRules;\n let iterator;\n\n if (list.value && !(list instanceof Quote)) {\n if (Array.isArray(list.value)) {\n iterator = list.value;\n } else {\n iterator = [list.value];\n }\n } else if (list.ruleset) {\n iterator = list.ruleset.rules;\n } else if (list.rules) {\n iterator = list.rules;\n } else if (Array.isArray(list)) {\n iterator = list;\n } else {\n iterator = [list];\n }\n\n let valueName = '@value';\n let keyName = '@key';\n let indexName = '@index';\n\n if (rs.params) {\n valueName = rs.params[0] && rs.params[0].name;\n keyName = rs.params[1] && rs.params[1].name;\n indexName = rs.params[2] && rs.params[2].name;\n rs = rs.rules;\n } else {\n rs = rs.ruleset;\n }\n\n for (let i = 0; i < iterator.length; i++) {\n let key;\n let value;\n const item = iterator[i];\n if (item instanceof Declaration) {\n key = typeof item.name === 'string' ? item.name : item.name[0].value;\n value = item.value;\n } else {\n key = new Dimension(i + 1);\n value = item;\n }\n\n if (item instanceof Comment) {\n continue;\n }\n\n newRules = rs.rules.slice(0);\n if (valueName) {\n newRules.push(new Declaration(valueName,\n value,\n false, false, this.index, this.currentFileInfo));\n }\n if (indexName) {\n newRules.push(new Declaration(indexName,\n new Dimension(i + 1),\n false, false, this.index, this.currentFileInfo));\n }\n if (keyName) {\n newRules.push(new Declaration(keyName,\n key,\n false, false, this.index, this.currentFileInfo));\n }\n\n rules.push(new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n newRules,\n rs.strictImports,\n rs.visibilityInfo()\n ));\n }\n\n return new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n rules,\n rs.strictImports,\n rs.visibilityInfo()\n ).eval(this.context);\n }\n};\n","import Dimension from '../tree/dimension';\n\nconst MathHelper = (fn, unit, n) => {\n if (!(n instanceof Dimension)) {\n throw { type: 'Argument', message: 'argument must be a number' };\n }\n if (unit == null) {\n unit = n.unit;\n } else {\n n = n.unify();\n }\n return new Dimension(fn(parseFloat(n.value)), unit);\n};\n\nexport default MathHelper;","import mathHelper from './math-helper.js';\n\nconst mathFunctions = {\n // name, unit\n ceil: null,\n floor: null,\n sqrt: null,\n abs: null,\n tan: '',\n sin: '',\n cos: '',\n atan: 'rad',\n asin: 'rad',\n acos: 'rad'\n};\n\nfor (const f in mathFunctions) {\n if (mathFunctions.hasOwnProperty(f)) {\n mathFunctions[f] = mathHelper.bind(null, Math[f], mathFunctions[f]);\n }\n}\n\nmathFunctions.round = (n, f) => {\n const fraction = typeof f === 'undefined' ? 0 : f.value;\n return mathHelper(num => num.toFixed(fraction), null, n);\n};\n\nexport default mathFunctions;\n","import Dimension from '../tree/dimension';\nimport Anonymous from '../tree/anonymous';\nimport mathHelper from './math-helper.js';\n\nconst minMax = function (isMin, args) {\n args = Array.prototype.slice.call(args);\n switch (args.length) {\n case 0: throw { type: 'Argument', message: 'one or more arguments required' };\n }\n let i; // key is the unit.toString() for unified Dimension values,\n let j;\n let current;\n let currentUnified;\n let referenceUnified;\n let unit;\n let unitStatic;\n let unitClone;\n\n const // elems only contains original argument values.\n order = [];\n\n const values = {};\n // value is the index into the order array.\n for (i = 0; i < args.length; i++) {\n current = args[i];\n if (!(current instanceof Dimension)) {\n if (Array.isArray(args[i].value)) {\n Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value));\n }\n continue;\n }\n currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify();\n unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString();\n unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic;\n unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone;\n j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit];\n if (j === undefined) {\n if (unitStatic !== undefined && unit !== unitStatic) {\n throw { type: 'Argument', message: 'incompatible types' };\n }\n values[unit] = order.length;\n order.push(current);\n continue;\n }\n referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify();\n if ( isMin && currentUnified.value < referenceUnified.value ||\n !isMin && currentUnified.value > referenceUnified.value) {\n order[j] = current;\n }\n }\n if (order.length == 1) {\n return order[0];\n }\n args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', ');\n return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`);\n};\n\nexport default {\n min: function(...args) {\n return minMax(true, args);\n },\n max: function(...args) {\n return minMax(false, args);\n },\n convert: function (val, unit) {\n return val.convertTo(unit.value);\n },\n pi: function () {\n return new Dimension(Math.PI);\n },\n mod: function(a, b) {\n return new Dimension(a.value % b.value, a.unit);\n },\n pow: function(x, y) {\n if (typeof x === 'number' && typeof y === 'number') {\n x = new Dimension(x);\n y = new Dimension(y);\n } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) {\n throw { type: 'Argument', message: 'arguments must be numbers' };\n }\n\n return new Dimension(Math.pow(x.value, y.value), x.unit);\n },\n percentage: function (n) {\n const result = mathHelper(num => num * 100, '%', n);\n\n return result;\n }\n};\n","/**\n * Plugin Manager\n */\nclass PluginManager {\n constructor(less) {\n this.less = less;\n this.visitors = [];\n this.preProcessors = [];\n this.postProcessors = [];\n this.installedPlugins = [];\n this.fileManagers = [];\n this.iterator = -1;\n this.pluginCache = {};\n this.Loader = new less.PluginLoader(less);\n }\n\n /**\n * Adds all the plugins in the array\n * @param {Array} plugins\n */\n addPlugins(plugins) {\n if (plugins) {\n for (let i = 0; i < plugins.length; i++) {\n this.addPlugin(plugins[i]);\n }\n }\n }\n\n /**\n *\n * @param plugin\n * @param {String} filename\n */\n addPlugin(plugin, filename, functionRegistry) {\n this.installedPlugins.push(plugin);\n if (filename) {\n this.pluginCache[filename] = plugin;\n }\n if (plugin.install) {\n plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry);\n }\n }\n\n /**\n *\n * @param filename\n */\n get(filename) {\n return this.pluginCache[filename];\n }\n\n /**\n * Adds a visitor. The visitor object has options on itself to determine\n * when it should run.\n * @param visitor\n */\n addVisitor(visitor) {\n this.visitors.push(visitor);\n }\n\n /**\n * Adds a pre processor object\n * @param {object} preProcessor\n * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import\n */\n addPreProcessor(preProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) {\n if (this.preProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.preProcessors.splice(indexToInsertAt, 0, {preProcessor, priority});\n }\n\n /**\n * Adds a post processor object\n * @param {object} postProcessor\n * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression\n */\n addPostProcessor(postProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) {\n if (this.postProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.postProcessors.splice(indexToInsertAt, 0, {postProcessor, priority});\n }\n\n /**\n *\n * @param manager\n */\n addFileManager(manager) {\n this.fileManagers.push(manager);\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPreProcessors() {\n const preProcessors = [];\n for (let i = 0; i < this.preProcessors.length; i++) {\n preProcessors.push(this.preProcessors[i].preProcessor);\n }\n return preProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPostProcessors() {\n const postProcessors = [];\n for (let i = 0; i < this.postProcessors.length; i++) {\n postProcessors.push(this.postProcessors[i].postProcessor);\n }\n return postProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getVisitors() {\n return this.visitors;\n }\n\n visitor() {\n const self = this;\n return {\n first: function() {\n self.iterator = -1;\n return self.visitors[self.iterator];\n },\n get: function() {\n self.iterator += 1;\n return self.visitors[self.iterator];\n }\n };\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getFileManagers() {\n return this.fileManagers;\n }\n}\n\nlet pm;\n\nfunction PluginManagerFactory(less, newFactory) {\n if (newFactory || !pm) {\n pm = new PluginManager(less);\n }\n return pm;\n};\n\n//\nexport default PluginManagerFactory;\n","import Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport Quote from '../tree/quoted';\nimport JavaScript from '../tree/javascript';\n\nexport default {\n e: function (str) {\n return new Quote('\"', str instanceof JavaScript ? str.evaluated : str.value, true);\n },\n escape: function (str) {\n return new Anonymous(\n encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B')\n .replace(/\\(/g, '%28').replace(/\\)/g, '%29'));\n },\n replace: function (string, pattern, replacement, flags) {\n let result = string.value;\n replacement = (replacement.type === 'Quoted') ?\n replacement.value : replacement.toCSS();\n result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement);\n return new Quoted(string.quote || '', result, string.escaped);\n },\n '%': function (string /* arg, arg, ... */) {\n const args = Array.prototype.slice.call(arguments, 1);\n let result = string.value;\n\n for (let i = 0; i < args.length; i++) {\n /* jshint loopfunc:true */\n result = result.replace(/%[sda]/i, token => {\n const value = ((args[i].type === 'Quoted') &&\n token.match(/s/i)) ? args[i].value : args[i].toCSS();\n return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;\n });\n }\n result = result.replace(/%%/g, '%');\n return new Quoted(string.quote || '', result, string.escaped);\n }\n};\n","import Keyword from '../tree/keyword';\nimport DetachedRuleset from '../tree/detached-ruleset';\nimport Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport URL from '../tree/url';\nimport Operation from '../tree/operation';\n\nconst isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False;\nconst isunit = (n, unit) => {\n if (unit === undefined) {\n throw { type: 'Argument', message: 'missing the required second argument to isunit.' };\n }\n unit = typeof unit.value === 'string' ? unit.value : unit;\n if (typeof unit !== 'string') {\n throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' };\n }\n return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False;\n};\n\nexport default {\n isruleset: function (n) {\n return isa(n, DetachedRuleset);\n },\n iscolor: function (n) {\n return isa(n, Color);\n },\n isnumber: function (n) {\n return isa(n, Dimension);\n },\n isstring: function (n) {\n return isa(n, Quoted);\n },\n iskeyword: function (n) {\n return isa(n, Keyword);\n },\n isurl: function (n) {\n return isa(n, URL);\n },\n ispixel: function (n) {\n return isunit(n, 'px');\n },\n ispercentage: function (n) {\n return isunit(n, '%');\n },\n isem: function (n) {\n return isunit(n, 'em');\n },\n isunit,\n unit: function (val, unit) {\n if (!(val instanceof Dimension)) {\n throw { type: 'Argument',\n message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` };\n }\n if (unit) {\n if (unit instanceof Keyword) {\n unit = unit.value;\n } else {\n unit = unit.toCSS();\n }\n } else {\n unit = '';\n }\n return new Dimension(val.value, unit);\n },\n 'get-unit': function (n) {\n return new Anonymous(n.unit);\n }\n};\n","import functionRegistry from './function-registry';\nimport functionCaller from './function-caller';\n\nimport boolean from './boolean';\nimport defaultFunc from './default';\nimport color from './color';\nimport colorBlending from './color-blending';\nimport dataUri from './data-uri';\nimport list from './list';\nimport math from './math';\nimport number from './number';\nimport string from './string';\nimport svg from './svg';\nimport types from './types';\n\nexport default environment => {\n const functions = { functionRegistry, functionCaller };\n\n // register functions\n functionRegistry.addMultiple(boolean);\n functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc));\n functionRegistry.addMultiple(color);\n functionRegistry.addMultiple(colorBlending);\n functionRegistry.addMultiple(dataUri(environment));\n functionRegistry.addMultiple(list);\n functionRegistry.addMultiple(math);\n functionRegistry.addMultiple(number);\n functionRegistry.addMultiple(string);\n functionRegistry.addMultiple(svg(environment));\n functionRegistry.addMultiple(types);\n\n return functions;\n};\n","import Quoted from '../tree/quoted';\nimport URL from '../tree/url';\nimport * as utils from '../utils';\nimport logger from '../logger';\n\nexport default environment => {\n \n const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); \n\n return { 'data-uri': function(mimetypeNode, filePathNode) {\n\n if (!filePathNode) {\n filePathNode = mimetypeNode;\n mimetypeNode = null;\n }\n\n let mimetype = mimetypeNode && mimetypeNode.value;\n let filePath = filePathNode.value;\n const currentFileInfo = this.currentFileInfo;\n const currentDirectory = currentFileInfo.rewriteUrls ?\n currentFileInfo.currentDirectory : currentFileInfo.entryPath;\n\n const fragmentStart = filePath.indexOf('#');\n let fragment = '';\n if (fragmentStart !== -1) {\n fragment = filePath.slice(fragmentStart);\n filePath = filePath.slice(0, fragmentStart);\n }\n const context = utils.clone(this.context);\n context.rawBuffer = true;\n\n const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true);\n\n if (!fileManager) {\n return fallback(this, filePathNode);\n }\n\n let useBase64 = false;\n\n // detect the mimetype if not given\n if (!mimetypeNode) {\n\n mimetype = environment.mimeLookup(filePath);\n\n if (mimetype === 'image/svg+xml') {\n useBase64 = false;\n } else {\n // use base 64 unless it's an ASCII or UTF-8 format\n const charset = environment.charsetLookup(mimetype);\n useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0;\n }\n if (useBase64) { mimetype += ';base64'; }\n }\n else {\n useBase64 = /;base64$/.test(mimetype);\n }\n\n const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment);\n if (!fileSync.contents) {\n logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`);\n return fallback(this, filePathNode || mimetypeNode);\n }\n let buf = fileSync.contents;\n if (useBase64 && !environment.encodeBase64) {\n return fallback(this, filePathNode);\n }\n\n buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf);\n\n const uri = `data:${mimetype},${buf}${fragment}`;\n\n return new URL(new Quoted(`\"${uri}\"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Expression from '../tree/expression';\nimport Quoted from '../tree/quoted';\nimport URL from '../tree/url';\n\nexport default environment => {\n return { 'svg-gradient': function(direction) {\n let stops;\n let gradientDirectionSvg;\n let gradientType = 'linear';\n let rectangleDimension = 'x=\"0\" y=\"0\" width=\"1\" height=\"1\"';\n const renderEnv = {compress: false};\n let returner;\n const directionValue = direction.toCSS(renderEnv);\n let i;\n let color;\n let position;\n let positionValue;\n let alpha;\n\n function throwArgumentDescriptor() {\n throw { type: 'Argument',\n message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' +\n ' end_color [end_position] or direction, color list' };\n }\n\n if (arguments.length == 2) {\n if (arguments[1].value.length < 2) {\n throwArgumentDescriptor();\n }\n stops = arguments[1].value;\n } else if (arguments.length < 3) {\n throwArgumentDescriptor();\n } else {\n stops = Array.prototype.slice.call(arguments, 1);\n }\n\n switch (directionValue) {\n case 'to bottom':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"0%\" y2=\"100%\"';\n break;\n case 'to right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'to bottom right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"100%\"';\n break;\n case 'to top right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"100%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'ellipse':\n case 'ellipse at center':\n gradientType = 'radial';\n gradientDirectionSvg = 'cx=\"50%\" cy=\"50%\" r=\"75%\"';\n rectangleDimension = 'x=\"-50\" y=\"-50\" width=\"101\" height=\"101\"';\n break;\n default:\n throw { type: 'Argument', message: 'svg-gradient direction must be \\'to bottom\\', \\'to right\\',' +\n ' \\'to bottom right\\', \\'to top right\\' or \\'ellipse at center\\'' };\n }\n returner = `<${gradientType}Gradient id=\"g\" ${gradientDirectionSvg}>`;\n\n for (i = 0; i < stops.length; i += 1) {\n if (stops[i] instanceof Expression) {\n color = stops[i].value[0];\n position = stops[i].value[1];\n } else {\n color = stops[i];\n position = undefined;\n }\n\n if (!(color instanceof Color) || (!((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension))) {\n throwArgumentDescriptor();\n }\n positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%';\n alpha = color.alpha;\n returner += ``;\n }\n returner += ``;\n\n returner = encodeURIComponent(returner);\n\n returner = `data:image/svg+xml,${returner}`;\n return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import contexts from './contexts';\nimport visitor from './visitors';\nimport tree from './tree';\n\nexport default (root, options = {}) => {\n let evaldRoot;\n let variables = options.variables;\n const evalEnv = new contexts.Eval(options);\n\n //\n // Allows setting variables with a hash, so:\n //\n // `{ color: new tree.Color('#f01') }` will become:\n //\n // new tree.Declaration('@color',\n // new tree.Value([\n // new tree.Expression([\n // new tree.Color('#f01')\n // ])\n // ])\n // )\n //\n if (typeof variables === 'object' && !Array.isArray(variables)) {\n variables = Object.keys(variables).map(k => {\n let value = variables[k];\n\n if (!(value instanceof tree.Value)) {\n if (!(value instanceof tree.Expression)) {\n value = new tree.Expression([value]);\n }\n value = new tree.Value([value]);\n }\n return new tree.Declaration(`@${k}`, value, false, null, 0);\n });\n evalEnv.frames = [new tree.Ruleset(null, variables)];\n }\n\n const visitors = [\n new visitor.JoinSelectorVisitor(),\n new visitor.MarkVisibleSelectorsVisitor(true),\n new visitor.ExtendVisitor(),\n new visitor.ToCSSVisitor({compress: Boolean(options.compress)})\n ];\n\n const preEvalVisitors = [];\n let v;\n let visitorIterator;\n\n /**\n * first() / get() allows visitors to be added while visiting\n * \n * @todo Add scoping for visitors just like functions for @plugin; right now they're global\n */\n if (options.pluginManager) {\n visitorIterator = options.pluginManager.visitor();\n for (var i = 0; i < 2; i++) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (v.isPreEvalVisitor) {\n if (i === 0 || preEvalVisitors.indexOf(v) === -1) {\n preEvalVisitors.push(v);\n v.run(root);\n }\n }\n else {\n if (i === 0 || visitors.indexOf(v) === -1) {\n if (v.isPreVisitor) {\n visitors.unshift(v);\n }\n else {\n visitors.push(v);\n }\n }\n }\n }\n }\n }\n\n evaldRoot = root.eval(evalEnv);\n\n for (var i = 0; i < visitors.length; i++) {\n visitors[i].run(evaldRoot);\n }\n\n // Run any remaining visitors added after eval pass\n if (options.pluginManager) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (visitors.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) {\n v.run(evaldRoot);\n }\n }\n }\n\n return evaldRoot;\n};\n","/* global window, XMLHttpRequest */\n\nimport AbstractFileManager from '../less/environment/abstract-file-manager.js';\n\nlet options;\nlet logger;\nlet fileCache = {};\n\n// TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load\nclass FileManager extends AbstractFileManager {\n alwaysMakePathsAbsolute() {\n return true;\n }\n\n join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return this.extractUrlParts(laterPath, basePath).path;\n }\n\n doXHR(url, type, callback, errback) {\n const xhr = new XMLHttpRequest();\n const async = options.isFileProtocol ? options.fileAsync : true;\n\n if (typeof xhr.overrideMimeType === 'function') {\n xhr.overrideMimeType('text/css');\n }\n logger.debug(`XHR: Getting '${url}'`);\n xhr.open('GET', url, async);\n xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');\n xhr.send(null);\n\n function handleResponse(xhr, callback, errback) {\n if (xhr.status >= 200 && xhr.status < 300) {\n callback(xhr.responseText,\n xhr.getResponseHeader('Last-Modified'));\n } else if (typeof errback === 'function') {\n errback(xhr.status, url);\n }\n }\n\n if (options.isFileProtocol && !options.fileAsync) {\n if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {\n callback(xhr.responseText);\n } else {\n errback(xhr.status, url);\n }\n } else if (async) {\n xhr.onreadystatechange = () => {\n if (xhr.readyState == 4) {\n handleResponse(xhr, callback, errback);\n }\n };\n } else {\n handleResponse(xhr, callback, errback);\n }\n }\n\n supports() {\n return true;\n }\n\n clearFileCache() {\n fileCache = {};\n }\n\n loadFile(filename, currentDirectory, options, environment) {\n // TODO: Add prefix support like less-node?\n // What about multiple paths?\n\n if (currentDirectory && !this.isPathAbsolute(filename)) {\n filename = currentDirectory + filename;\n }\n\n filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename;\n\n options = options || {};\n\n // sheet may be set to the stylesheet for the initial load or a collection of properties including\n // some context variables for imports\n const hrefParts = this.extractUrlParts(filename, window.location.href);\n const href = hrefParts.url;\n const self = this;\n \n return new Promise((resolve, reject) => {\n if (options.useFileCache && fileCache[href]) {\n try {\n const lessText = fileCache[href];\n return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }});\n } catch (e) {\n return reject({ filename: href, message: `Error loading file ${href} error was ${e.message}` });\n }\n }\n\n self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) {\n // per file cache\n fileCache[href] = data;\n\n // Use remote copy (re-parse)\n resolve({ contents: data, filename: href, webInfo: { lastModified }});\n }, function doXHRError(status, url) {\n reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href });\n });\n });\n }\n}\n\nexport default (opts, log) => {\n options = opts;\n logger = log;\n return FileManager;\n}\n","import data from './data';\nimport tree from './tree';\nimport Environment from './environment/environment';\nimport AbstractFileManager from './environment/abstract-file-manager';\nimport AbstractPluginLoader from './environment/abstract-plugin-loader';\nimport visitors from './visitors';\nimport Parser from './parser/parser';\nimport Functions from './functions';\nimport contexts from './contexts';\nimport sourceMapOutput from './source-map-output';\nimport sourceMapBuilder from './source-map-builder';\nimport parseTree from './parse-tree';\nimport importManager from './import-manager';\nimport Render from './render';\nimport Parse from './parse';\nimport LessError from './less-error';\nimport transformTree from './transform-tree';\nimport * as utils from './utils';\nimport PluginManager from './plugin-manager';\nimport logger from './logger';\n\nexport default (environment, fileManagers) => {\n /**\n * @todo\n * This original code could be improved quite a bit.\n * Many classes / modules currently add side-effects / mutations to passed in objects,\n * which makes it hard to refactor and reason about. \n */\n environment = new Environment(environment, fileManagers);\n\n const SourceMapOutput = sourceMapOutput(environment);\n const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment);\n const ParseTree = parseTree(SourceMapBuilder);\n const ImportManager = importManager(environment);\n const render = Render(environment, ParseTree, ImportManager);\n const parse = Parse(environment, ParseTree, ImportManager);\n const functions = Functions(environment);\n\n /**\n * @todo\n * This root properties / methods need to be organized.\n * It's not clear what should / must be public and why.\n */\n const initial = {\n version: [3, 10, 0],\n data,\n tree,\n Environment,\n AbstractFileManager,\n AbstractPluginLoader,\n environment,\n visitors,\n Parser,\n functions,\n contexts,\n SourceMapOutput,\n SourceMapBuilder,\n ParseTree,\n ImportManager,\n render,\n parse,\n LessError,\n transformTree,\n utils,\n PluginManager,\n logger\n };\n\n // Create a public API\n const ctor = t => function (...args) {\n return new t(...args);\n };\n\n let t;\n const api = Object.create(initial);\n for (const n in initial.tree) {\n /* eslint guard-for-in: 0 */\n t = initial.tree[n];\n if (typeof t === 'function') {\n api[n.toLowerCase()] = ctor(t);\n }\n else {\n api[n] = Object.create(null);\n for (const o in t) {\n /* eslint guard-for-in: 0 */\n api[n][o.toLowerCase()] = ctor(t[o]);\n }\n }\n }\n\n return api;\n};\n","export default environment => {\n class SourceMapOutput {\n constructor(options) {\n this._css = [];\n this._rootNode = options.rootNode;\n this._contentsMap = options.contentsMap;\n this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap;\n if (options.sourceMapFilename) {\n this._sourceMapFilename = options.sourceMapFilename.replace(/\\\\/g, '/');\n }\n this._outputFilename = options.outputFilename;\n this.sourceMapURL = options.sourceMapURL;\n if (options.sourceMapBasepath) {\n this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\\\/g, '/');\n }\n if (options.sourceMapRootpath) {\n this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\\\/g, '/');\n if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') {\n this._sourceMapRootpath += '/';\n }\n } else {\n this._sourceMapRootpath = '';\n }\n this._outputSourceFiles = options.outputSourceFiles;\n this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator();\n\n this._lineNumber = 0;\n this._column = 0;\n }\n\n removeBasepath(path) {\n if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) {\n path = path.substring(this._sourceMapBasepath.length);\n if (path.charAt(0) === '\\\\' || path.charAt(0) === '/') {\n path = path.substring(1);\n }\n }\n\n return path;\n }\n\n normalizeFilename(filename) {\n filename = filename.replace(/\\\\/g, '/');\n filename = this.removeBasepath(filename);\n return (this._sourceMapRootpath || '') + filename;\n }\n\n add(chunk, fileInfo, index, mapLines) {\n // ignore adding empty strings\n if (!chunk) {\n return;\n }\n\n let lines;\n let sourceLines;\n let columns;\n let sourceColumns;\n let i;\n\n if (fileInfo && fileInfo.filename) {\n let inputSource = this._contentsMap[fileInfo.filename];\n\n // remove vars/banner added to the top of the file\n if (this._contentsIgnoredCharsMap[fileInfo.filename]) {\n // adjust the index\n index -= this._contentsIgnoredCharsMap[fileInfo.filename];\n if (index < 0) { index = 0; }\n // adjust the source\n inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]);\n }\n\n // ignore empty content\n if (inputSource === undefined) {\n return;\n }\n\n inputSource = inputSource.substring(0, index);\n sourceLines = inputSource.split('\\n');\n sourceColumns = sourceLines[sourceLines.length - 1];\n }\n\n lines = chunk.split('\\n');\n columns = lines[lines.length - 1];\n\n if (fileInfo && fileInfo.filename) {\n if (!mapLines) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column},\n original: { line: sourceLines.length, column: sourceColumns.length},\n source: this.normalizeFilename(fileInfo.filename)});\n } else {\n for (i = 0; i < lines.length; i++) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0},\n original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0},\n source: this.normalizeFilename(fileInfo.filename)});\n }\n }\n }\n\n if (lines.length === 1) {\n this._column += columns.length;\n } else {\n this._lineNumber += lines.length - 1;\n this._column = columns.length;\n }\n\n this._css.push(chunk);\n }\n\n isEmpty() {\n return this._css.length === 0;\n }\n\n toCSS(context) {\n this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null });\n\n if (this._outputSourceFiles) {\n for (const filename in this._contentsMap) {\n if (this._contentsMap.hasOwnProperty(filename)) {\n let source = this._contentsMap[filename];\n if (this._contentsIgnoredCharsMap[filename]) {\n source = source.slice(this._contentsIgnoredCharsMap[filename]);\n }\n this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source);\n }\n }\n }\n\n this._rootNode.genCSS(context, this);\n\n if (this._css.length > 0) {\n let sourceMapURL;\n const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON());\n\n if (this.sourceMapURL) {\n sourceMapURL = this.sourceMapURL;\n } else if (this._sourceMapFilename) {\n sourceMapURL = this._sourceMapFilename;\n }\n this.sourceMapURL = sourceMapURL;\n\n this.sourceMap = sourceMapContent;\n }\n\n return this._css.join('');\n }\n }\n\n return SourceMapOutput;\n};\n","export default (SourceMapOutput, environment) => {\n class SourceMapBuilder {\n constructor(options) {\n this.options = options;\n }\n\n toCSS(rootNode, options, imports) {\n const sourceMapOutput = new SourceMapOutput(\n {\n contentsIgnoredCharsMap: imports.contentsIgnoredChars,\n rootNode,\n contentsMap: imports.contents,\n sourceMapFilename: this.options.sourceMapFilename,\n sourceMapURL: this.options.sourceMapURL,\n outputFilename: this.options.sourceMapOutputFilename,\n sourceMapBasepath: this.options.sourceMapBasepath,\n sourceMapRootpath: this.options.sourceMapRootpath,\n outputSourceFiles: this.options.outputSourceFiles,\n sourceMapGenerator: this.options.sourceMapGenerator,\n sourceMapFileInline: this.options.sourceMapFileInline\n });\n\n const css = sourceMapOutput.toCSS(options);\n this.sourceMap = sourceMapOutput.sourceMap;\n this.sourceMapURL = sourceMapOutput.sourceMapURL;\n if (this.options.sourceMapInputFilename) {\n this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename);\n }\n if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) {\n this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL);\n }\n return css + this.getCSSAppendage();\n }\n\n getCSSAppendage() {\n\n let sourceMapURL = this.sourceMapURL;\n if (this.options.sourceMapFileInline) {\n if (this.sourceMap === undefined) {\n return '';\n }\n sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`;\n }\n\n if (sourceMapURL) {\n return `/*# sourceMappingURL=${sourceMapURL} */`;\n }\n return '';\n }\n\n getExternalSourceMap() {\n return this.sourceMap;\n }\n\n setExternalSourceMap(sourceMap) {\n this.sourceMap = sourceMap;\n }\n\n isInline() {\n return this.options.sourceMapFileInline;\n }\n\n getSourceMapURL() {\n return this.sourceMapURL;\n }\n\n getOutputFilename() {\n return this.options.sourceMapOutputFilename;\n }\n\n getInputFilename() {\n return this.sourceMapInputFilename;\n }\n }\n\n return SourceMapBuilder;\n};\n","import LessError from './less-error';\nimport transformTree from './transform-tree';\nimport logger from './logger';\n\nexport default SourceMapBuilder => {\n class ParseTree {\n constructor(root, imports) {\n this.root = root;\n this.imports = imports;\n }\n\n toCSS(options) {\n let evaldRoot;\n const result = {};\n let sourceMapBuilder;\n try {\n evaldRoot = transformTree(this.root, options);\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n try {\n const compress = Boolean(options.compress);\n if (compress) {\n logger.warn('The compress option has been deprecated. ' + \n 'We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.');\n }\n\n const toCSSOptions = {\n compress,\n dumpLineNumbers: options.dumpLineNumbers,\n strictUnits: Boolean(options.strictUnits),\n numPrecision: 8};\n\n if (options.sourceMap) {\n sourceMapBuilder = new SourceMapBuilder(options.sourceMap);\n result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports);\n } else {\n result.css = evaldRoot.toCSS(toCSSOptions);\n }\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n if (options.pluginManager) {\n const postProcessors = options.pluginManager.getPostProcessors();\n for (let i = 0; i < postProcessors.length; i++) {\n result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options, imports: this.imports });\n }\n }\n if (options.sourceMap) {\n result.map = sourceMapBuilder.getExternalSourceMap();\n }\n\n result.imports = [];\n for (const file in this.imports.files) {\n if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) {\n result.imports.push(file);\n }\n }\n return result;\n }\n }\n\n return ParseTree;\n};\n","import contexts from './contexts';\nimport Parser from './parser/parser';\nimport LessError from './less-error';\nimport * as utils from './utils';\nimport logger from './logger';\n\nexport default environment => {\n // FileInfo = {\n // 'rewriteUrls' - option - whether to adjust URL's to be relative\n // 'filename' - full resolved filename of current file\n // 'rootpath' - path to append to normal URLs for this node\n // 'currentDirectory' - path to the current file, absolute\n // 'rootFilename' - filename of the base file\n // 'entryPath' - absolute path to the entry file\n // 'reference' - whether the file should not be output and only output parts that are referenced\n\n class ImportManager {\n constructor(less, context, rootFileInfo) {\n this.less = less;\n this.rootFilename = rootFileInfo.filename;\n this.paths = context.paths || []; // Search paths, when importing\n this.contents = {}; // map - filename to contents of all the files\n this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore\n this.mime = context.mime;\n this.error = null;\n this.context = context;\n // Deprecated? Unused outside of here, could be useful.\n this.queue = []; // Files which haven't been imported yet\n this.files = {}; // Holds the imported parse trees.\n }\n\n /**\n * Add an import to be imported\n * @param path - the raw path\n * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension)\n * @param currentFileInfo - the current file info (used for instance to work out relative paths)\n * @param importOptions - import options\n * @param callback - callback for when it is imported\n */\n push(path, tryAppendExtension, currentFileInfo, importOptions, callback) {\n const importManager = this;\n const pluginLoader = this.context.pluginManager.Loader;\n\n this.queue.push(path);\n\n const fileParsedFunc = (e, root, fullPath) => {\n importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue\n\n const importedEqualsRoot = fullPath === importManager.rootFilename;\n if (importOptions.optional && e) {\n callback(null, {rules:[]}, false, null);\n logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`);\n }\n else {\n // Inline imports aren't cached here.\n // If we start to cache them, please make sure they won't conflict with non-inline imports of the\n // same name as they used to do before this comment and the condition below have been added.\n if (!importManager.files[fullPath] && !importOptions.inline) {\n importManager.files[fullPath] = { root, options: importOptions };\n }\n if (e && !importManager.error) { importManager.error = e; }\n callback(e, root, importedEqualsRoot, fullPath);\n }\n };\n\n const newFileInfo = {\n rewriteUrls: this.context.rewriteUrls,\n entryPath: currentFileInfo.entryPath,\n rootpath: currentFileInfo.rootpath,\n rootFilename: currentFileInfo.rootFilename\n };\n\n const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment);\n\n if (!fileManager) {\n fileParsedFunc({ message: `Could not find a file-manager for ${path}` });\n return;\n }\n\n const loadFileCallback = loadedFile => {\n let plugin;\n const resolvedFilename = loadedFile.filename;\n const contents = loadedFile.contents.replace(/^\\uFEFF/, '');\n\n // Pass on an updated rootpath if path of imported file is relative and file\n // is in a (sub|sup) directory\n //\n // Examples:\n // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/',\n // then rootpath should become 'less/module/nav/'\n // - If path of imported file is '../mixins.less' and rootpath is 'less/',\n // then rootpath should become 'less/../'\n newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename);\n if (newFileInfo.rewriteUrls) {\n newFileInfo.rootpath = fileManager.join(\n (importManager.context.rootpath || ''),\n fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath));\n\n if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) {\n newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath);\n }\n }\n newFileInfo.filename = resolvedFilename;\n\n const newEnv = new contexts.Parse(importManager.context);\n\n newEnv.processImports = false;\n importManager.contents[resolvedFilename] = contents;\n\n if (currentFileInfo.reference || importOptions.reference) {\n newFileInfo.reference = true;\n }\n\n if (importOptions.isPlugin) {\n plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo);\n if (plugin instanceof LessError) {\n fileParsedFunc(plugin, null, resolvedFilename);\n }\n else {\n fileParsedFunc(null, plugin, resolvedFilename);\n }\n } else if (importOptions.inline) {\n fileParsedFunc(null, contents, resolvedFilename);\n } else {\n\n // import (multiple) parse trees apparently get altered and can't be cached.\n // TODO: investigate why this is\n if (importManager.files[resolvedFilename]\n && !importManager.files[resolvedFilename].options.multiple\n && !importOptions.multiple) {\n\n fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename);\n }\n else {\n new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => {\n fileParsedFunc(e, root, resolvedFilename);\n });\n }\n }\n };\n let promise;\n const context = utils.clone(this.context);\n\n if (tryAppendExtension) {\n context.ext = importOptions.isPlugin ? '.js' : '.less';\n }\n\n if (importOptions.isPlugin) {\n context.mime = 'application/javascript';\n promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager);\n }\n else {\n promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment,\n (err, loadedFile) => {\n if (err) {\n fileParsedFunc(err);\n } else {\n loadFileCallback(loadedFile);\n }\n });\n }\n if (promise) {\n promise.then(loadFileCallback, fileParsedFunc);\n }\n }\n }\n\n return ImportManager;\n};\n","let PromiseConstructor;\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const render = function (input, options, callback) {\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n render.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n this.parse(input, options, (err, root, imports, options) => {\n if (err) { return callback(err); }\n\n let result;\n try {\n const parseTree = new ParseTree(root, imports);\n result = parseTree.toCSS(options);\n }\n catch (err) { return callback(err); }\n\n callback(null, result);\n });\n }\n };\n\n return render;\n};\n","let PromiseConstructor;\nimport contexts from './contexts';\nimport Parser from './parser/parser';\nimport PluginManager from './plugin-manager';\nimport LessError from './less-error';\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const parse = function (input, options, callback) {\n\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n parse.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n let context;\n let rootFileInfo;\n const pluginManager = new PluginManager(this, !options.reUsePluginManager);\n\n options.pluginManager = pluginManager;\n\n context = new contexts.Parse(options);\n\n if (options.rootFileInfo) {\n rootFileInfo = options.rootFileInfo;\n } else {\n const filename = options.filename || 'input';\n const entryPath = filename.replace(/[^\\/\\\\]*$/, '');\n rootFileInfo = {\n filename,\n rewriteUrls: context.rewriteUrls,\n rootpath: context.rootpath || '',\n currentDirectory: entryPath,\n entryPath,\n rootFilename: filename\n };\n // add in a missing trailing slash\n if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') {\n rootFileInfo.rootpath += '/';\n }\n }\n\n const imports = new ImportManager(this, context, rootFileInfo);\n this.importManager = imports;\n\n // TODO: allow the plugins to be just a list of paths or names\n // Do an async plugin queue like lessc\n\n if (options.plugins) {\n options.plugins.forEach(plugin => {\n let evalResult;\n let contents;\n if (plugin.fileContent) {\n contents = plugin.fileContent.replace(/^\\uFEFF/, '');\n evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename);\n if (evalResult instanceof LessError) {\n return callback(evalResult);\n }\n }\n else {\n pluginManager.addPlugin(plugin);\n }\n });\n }\n\n new Parser(context, imports, rootFileInfo)\n .parse(input, (e, root) => {\n if (e) { return callback(e); }\n callback(null, root, imports, options);\n }, options);\n }\n };\n return parse;\n};\n","// TODO: Add tests for browser @plugin\n/* global window */\n\nimport AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js';\n\n/**\n * Browser Plugin Loader\n */\nclass PluginLoader extends AbstractPluginLoader {\n constructor(less) {\n super();\n\n this.less = less;\n // Should we shim this.require for browser? Probably not?\n }\n\n loadPlugin(filename, basePath, context, environment, fileManager) {\n return new Promise((fulfill, reject) => {\n fileManager.loadFile(filename, basePath, context, environment)\n .then(fulfill).catch(reject);\n });\n }\n}\n\nexport default PluginLoader;\n\n","import * as utils from './utils';\nimport browser from './browser';\n\nexport default (window, less, options) => {\n\n function errorHTML(e, rootHref) {\n const id = `less-error-message:${utils.extractId(rootHref || '')}`;\n const template = '
      • {content}
        • ';\n const elem = window.document.createElement('div');\n let timer;\n let content;\n const errors = [];\n const filename = e.filename || rootHref;\n const filenameNoPath = filename.match(/([^\\/]+(\\?.*)?)$/)[1];\n\n elem.id = id;\n elem.className = 'less-error-message';\n\n content = `

        ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}` + \n `

        in ${filenameNoPath} `;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += `on line ${e.line}, column ${e.column + 1}:

          ${errors.join('')}
        `;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `
        Stack Trace
        ${e.stack.split('\\n').slice(1).join('
        ')}`;\n }\n elem.innerHTML = content;\n\n // CSS for error messages\n browser.createCSS(window.document, [\n '.less-error-message ul, .less-error-message li {',\n 'list-style-type: none;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message label {',\n 'font-size: 12px;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'color: #cc7777;',\n '}',\n '.less-error-message pre {',\n 'color: #dd6666;',\n 'padding: 4px 0;',\n 'margin: 0;',\n 'display: inline-block;',\n '}',\n '.less-error-message pre.line {',\n 'color: #ff0000;',\n '}',\n '.less-error-message h3 {',\n 'font-size: 20px;',\n 'font-weight: bold;',\n 'padding: 15px 0 5px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message a {',\n 'color: #10a',\n '}',\n '.less-error-message .error {',\n 'color: red;',\n 'font-weight: bold;',\n 'padding-bottom: 2px;',\n 'border-bottom: 1px dashed red;',\n '}'\n ].join('\\n'), { title: 'error-message' });\n\n elem.style.cssText = [\n 'font-family: Arial, sans-serif',\n 'border: 1px solid #e00',\n 'background-color: #eee',\n 'border-radius: 5px',\n '-webkit-border-radius: 5px',\n '-moz-border-radius: 5px',\n 'color: #e00',\n 'padding: 15px',\n 'margin-bottom: 15px'\n ].join(';');\n\n if (options.env === 'development') {\n timer = setInterval(() => {\n const document = window.document;\n const body = document.body;\n if (body) {\n if (document.getElementById(id)) {\n body.replaceChild(elem, document.getElementById(id));\n } else {\n body.insertBefore(elem, body.firstChild);\n }\n clearInterval(timer);\n }\n }, 10);\n }\n }\n\n function removeErrorHTML(path) {\n const node = window.document.getElementById(`less-error-message:${utils.extractId(path)}`);\n if (node) {\n node.parentNode.removeChild(node);\n }\n }\n\n function removeErrorConsole(path) {\n // no action\n }\n\n function removeError(path) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n removeErrorHTML(path);\n } else if (options.errorReporting === 'console') {\n removeErrorConsole(path);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('remove', path);\n }\n }\n\n function errorConsole(e, rootHref) {\n const template = '{line} {content}';\n const filename = e.filename || rootHref;\n const errors = [];\n let content = `${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'} in ${filename}`;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += ` on line ${e.line}, column ${e.column + 1}:\\n${errors.join('\\n')}`;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `\\nStack Trace\\n${e.stack}`;\n }\n less.logger.error(content);\n }\n\n function error(e, rootHref) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n errorHTML(e, rootHref);\n } else if (options.errorReporting === 'console') {\n errorConsole(e, rootHref);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('add', e, rootHref);\n }\n }\n\n return {\n add: error,\n remove: removeError\n };\n};\n","/**\n * Kicks off less and compiles any stylesheets\n * used in the browser distributed version of less\n * to kick-start less using the browser api\n */\n/* global window, document */\n\nimport defaultOptions from '../less/default-options';\nimport addDefaultOptions from './add-default-options';\nimport root from './index';\n\nconst options = defaultOptions();\n\nif (window.less) {\n for (const key in window.less) {\n if (window.less.hasOwnProperty(key)) {\n options[key] = window.less[key];\n }\n }\n}\naddDefaultOptions(window, options);\n\noptions.plugins = options.plugins || [];\n\nif (window.LESS_PLUGINS) {\n options.plugins = options.plugins.concat(window.LESS_PLUGINS);\n}\n\nconst less = root(window, options);\nexport default less;\n\nwindow.less = less;\n\nlet css;\nlet head;\nlet style;\n\n// Always restore page visibility\nfunction resolveOrReject(data) {\n if (data.filename) {\n console.warn(data);\n }\n if (!options.async) {\n head.removeChild(style);\n }\n}\n\nif (options.onReady) {\n if (/!watch/.test(window.location.hash)) {\n less.watch();\n }\n // Simulate synchronous stylesheet loading by hiding page rendering\n if (!options.async) {\n css = 'body { display: none !important }';\n head = document.head || document.getElementsByTagName('head')[0];\n style = document.createElement('style');\n\n style.type = 'text/css';\n if (style.styleSheet) {\n style.styleSheet.cssText = css;\n } else {\n style.appendChild(document.createTextNode(css));\n }\n\n head.appendChild(style);\n }\n less.registerStylesheetsImmediately();\n less.pageLoadFinished = less.refresh(less.env === 'development').then(resolveOrReject, resolveOrReject);\n}\n","// Export a new default each time\nexport default () => ({\n /* Inline Javascript - @plugin still allowed */\n javascriptEnabled: false,\n\n /* Outputs a makefile import dependency list to stdout. */\n depends: false,\n\n /* (DEPRECATED) Compress using less built-in compression. \n * This does an okay job but does not utilise all the tricks of \n * dedicated css compression. */\n compress: false,\n\n /* Runs the less parser and just reports errors without any output. */\n lint: false,\n\n /* Sets available include paths.\n * If the file in an @import rule does not exist at that exact location, \n * less will look for it at the location(s) passed to this option. \n * You might use this for instance to specify a path to a library which \n * you want to be referenced simply and relatively in the less files. */\n paths: [],\n\n /* color output in the terminal */\n color: true,\n\n /* The strictImports controls whether the compiler will allow an @import inside of either \n * @media blocks or (a later addition) other selector blocks.\n * See: https://github.com/less/less.js/issues/656 */\n strictImports: false,\n\n /* Allow Imports from Insecure HTTPS Hosts */\n insecure: false,\n\n /* Allows you to add a path to every generated import and url in your css. \n * This does not affect less import statements that are processed, just ones \n * that are left in the output css. */\n rootpath: '',\n\n /* By default URLs are kept as-is, so if you import a file in a sub-directory \n * that references an image, exactly the same URL will be output in the css. \n * This option allows you to re-write URL's in imported files so that the \n * URL is always relative to the base imported file */\n rewriteUrls: false,\n\n /* How to process math \n * 0 always - 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\ No newline at end of file diff --git a/index.js b/index.js index 6bcc62066..2097ad092 100644 --- a/index.js +++ b/index.js @@ -1 +1 @@ -module.exports = require('./lib/less-node'); +module.exports = require('./dist/less.cjs.js'); diff --git a/lib/less/index.js b/lib/less/index.js index 9b2eec38e..7f4121546 100644 --- a/lib/less/index.js +++ b/lib/less/index.js @@ -42,7 +42,7 @@ export default (environment, fileManagers) => { * It's not clear what should / must be public and why. */ const initial = { - version: [3, 9, 0], + version: [3, 10, 0], data, tree, Environment, diff --git a/package.json b/package.json index 20af945c7..532118ea4 100644 --- a/package.json +++ b/package.json @@ -1,6 +1,6 @@ { "name": "less", - "version": "3.9.0", + "version": "3.10.0", "description": "Leaner CSS", "homepage": "http://lesscss.org", "author": { From 771dc3200ba535c79a96bd5b5c739fb6105edbea Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Fri, 2 Aug 2019 08:06:51 -0700 Subject: [PATCH 07/17] Fixed browsertest compilation, cleaned up comments --- .gitignore | 3 ++- Gruntfile.js | 50 +------------------------------------------- build/rollup.js | 10 ++++++++- dist/less.min.js | 9 ++++++++ dist/less.min.js.map | 2 +- 5 files changed, 22 insertions(+), 52 deletions(-) diff --git a/.gitignore b/.gitignore index 32a014709..1fa60cc30 100644 --- a/.gitignore +++ b/.gitignore @@ -14,7 +14,8 @@ npm-debug.log # project-specific tmp -test/browser/less.js +test/browser/less.min.js +test/browser/less.min.js.map test/sourcemaps/**/*.map test/sourcemaps/*.map test/sourcemaps/*.css diff --git a/Gruntfile.js b/Gruntfile.js index f6d842f9e..7276a5060 100644 --- a/Gruntfile.js +++ b/Gruntfile.js @@ -197,7 +197,7 @@ module.exports = function(grunt) { command: [ "node build/rollup.js --lessc --out='tmp/lessc'", "node build/rollup.js --node --out='tmp/less.cjs.js'", - "node build/rollup.js --browser out='test/browser/less.min.js'" + "node build/rollup.js --browser --out='test/browser/less.min.js'" ].join(" && ") }, test: { @@ -242,54 +242,6 @@ module.exports = function(grunt) { } }, - // browserify: { - // browser: { - // src: ["./lib/less-browser/bootstrap.js"], - // options: { - // exclude: ["promise"], - // browserifyOptions: { - // standalone: "less", - // noParse: ["clone"] - // } - // }, - // dest: "tmp/less.js" - // } - // }, - // concat: { - // options: { - // stripBanners: "all", - // banner: "<%= meta.banner %>" - // }, - // browsertest: { - // src: COMPRESS_FOR_TESTS - // ? "<%= uglify.test.dest %>" - // : "<%= browserify.browser.dest %>", - // dest: "test/browser/less.js" - // }, - // dist: { - // src: "<%= browserify.browser.dest %>", - // dest: "dist/less.js" - // } - // }, - - // uglify: { - // options: { - // banner: "<%= meta.banner %>", - // mangle: true, - // compress: { - // pure_getters: true - // } - // }, - // dist: { - // src: ["<%= concat.dist.dest %>"], - // dest: "dist/less.min.js" - // }, - // test: { - // src: "<%= browserify.browser.dest %>", - // dest: "tmp/less.min.js" - // } - // }, - eslint: { target: [ "test/**/*.js", diff --git a/build/rollup.js b/build/rollup.js index 5148e046b..788be9196 100644 --- a/build/rollup.js +++ b/build/rollup.js @@ -36,7 +36,15 @@ async function buildBrowser() { }]] }), terser({ - include: [/^.+\.min\.js$/] + include: [/^.+\.min\.js$/], + output: { + comments: function(node, comment) { + if (comment.type == "comment2") { + // preserve banner + return /@license/i.test(comment.value); + } + } + } }) ] }); 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style element is added to the DOM, otherwise IE 7 and 8 may crash.\n // See http://social.msdn.microsoft.com/Forums/en-US/7e081b65-878a-4c22-8e68-c10d39c2ed32/internet-explorer-crashes-appending-style-element-to-head\n if (styleNode.styleSheet) {\n try {\n styleNode.styleSheet.cssText = styles;\n } catch (e) {\n throw new Error('Couldn\\'t reassign styleSheet.cssText.');\n }\n }\n },\n currentScript: function(window) {\n const document = window.document;\n return document.currentScript || (() => {\n const scripts = document.getElementsByTagName('script');\n return scripts[scripts.length - 1];\n })();\n }\n};\n","export default {\n 'aliceblue':'#f0f8ff',\n 'antiquewhite':'#faebd7',\n 'aqua':'#00ffff',\n 'aquamarine':'#7fffd4',\n 'azure':'#f0ffff',\n 'beige':'#f5f5dc',\n 'bisque':'#ffe4c4',\n 'black':'#000000',\n 'blanchedalmond':'#ffebcd',\n 'blue':'#0000ff',\n 'blueviolet':'#8a2be2',\n 'brown':'#a52a2a',\n 'burlywood':'#deb887',\n 'cadetblue':'#5f9ea0',\n 'chartreuse':'#7fff00',\n 'chocolate':'#d2691e',\n 'coral':'#ff7f50',\n 'cornflowerblue':'#6495ed',\n 'cornsilk':'#fff8dc',\n 'crimson':'#dc143c',\n 'cyan':'#00ffff',\n 'darkblue':'#00008b',\n 'darkcyan':'#008b8b',\n 'darkgoldenrod':'#b8860b',\n 'darkgray':'#a9a9a9',\n 'darkgrey':'#a9a9a9',\n 'darkgreen':'#006400',\n 'darkkhaki':'#bdb76b',\n 'darkmagenta':'#8b008b',\n 'darkolivegreen':'#556b2f',\n 'darkorange':'#ff8c00',\n 'darkorchid':'#9932cc',\n 'darkred':'#8b0000',\n 'darksalmon':'#e9967a',\n 'darkseagreen':'#8fbc8f',\n 'darkslateblue':'#483d8b',\n 'darkslategray':'#2f4f4f',\n 'darkslategrey':'#2f4f4f',\n 'darkturquoise':'#00ced1',\n 'darkviolet':'#9400d3',\n 'deeppink':'#ff1493',\n 'deepskyblue':'#00bfff',\n 'dimgray':'#696969',\n 'dimgrey':'#696969',\n 'dodgerblue':'#1e90ff',\n 'firebrick':'#b22222',\n 'floralwhite':'#fffaf0',\n 'forestgreen':'#228b22',\n 'fuchsia':'#ff00ff',\n 'gainsboro':'#dcdcdc',\n 'ghostwhite':'#f8f8ff',\n 'gold':'#ffd700',\n 'goldenrod':'#daa520',\n 'gray':'#808080',\n 'grey':'#808080',\n 'green':'#008000',\n 'greenyellow':'#adff2f',\n 'honeydew':'#f0fff0',\n 'hotpink':'#ff69b4',\n 'indianred':'#cd5c5c',\n 'indigo':'#4b0082',\n 'ivory':'#fffff0',\n 'khaki':'#f0e68c',\n 'lavender':'#e6e6fa',\n 'lavenderblush':'#fff0f5',\n 'lawngreen':'#7cfc00',\n 'lemonchiffon':'#fffacd',\n 'lightblue':'#add8e6',\n 'lightcoral':'#f08080',\n 'lightcyan':'#e0ffff',\n 'lightgoldenrodyellow':'#fafad2',\n 'lightgray':'#d3d3d3',\n 'lightgrey':'#d3d3d3',\n 'lightgreen':'#90ee90',\n 'lightpink':'#ffb6c1',\n 'lightsalmon':'#ffa07a',\n 'lightseagreen':'#20b2aa',\n 'lightskyblue':'#87cefa',\n 'lightslategray':'#778899',\n 'lightslategrey':'#778899',\n 'lightsteelblue':'#b0c4de',\n 'lightyellow':'#ffffe0',\n 'lime':'#00ff00',\n 'limegreen':'#32cd32',\n 'linen':'#faf0e6',\n 'magenta':'#ff00ff',\n 'maroon':'#800000',\n 'mediumaquamarine':'#66cdaa',\n 'mediumblue':'#0000cd',\n 'mediumorchid':'#ba55d3',\n 'mediumpurple':'#9370d8',\n 'mediumseagreen':'#3cb371',\n 'mediumslateblue':'#7b68ee',\n 'mediumspringgreen':'#00fa9a',\n 'mediumturquoise':'#48d1cc',\n 'mediumvioletred':'#c71585',\n 'midnightblue':'#191970',\n 'mintcream':'#f5fffa',\n 'mistyrose':'#ffe4e1',\n 'moccasin':'#ffe4b5',\n 'navajowhite':'#ffdead',\n 'navy':'#000080',\n 'oldlace':'#fdf5e6',\n 'olive':'#808000',\n 'olivedrab':'#6b8e23',\n 'orange':'#ffa500',\n 'orangered':'#ff4500',\n 'orchid':'#da70d6',\n 'palegoldenrod':'#eee8aa',\n 'palegreen':'#98fb98',\n 'paleturquoise':'#afeeee',\n 'palevioletred':'#d87093',\n 'papayawhip':'#ffefd5',\n 'peachpuff':'#ffdab9',\n 'peru':'#cd853f',\n 'pink':'#ffc0cb',\n 'plum':'#dda0dd',\n 'powderblue':'#b0e0e6',\n 'purple':'#800080',\n 'rebeccapurple':'#663399',\n 'red':'#ff0000',\n 'rosybrown':'#bc8f8f',\n 'royalblue':'#4169e1',\n 'saddlebrown':'#8b4513',\n 'salmon':'#fa8072',\n 'sandybrown':'#f4a460',\n 'seagreen':'#2e8b57',\n 'seashell':'#fff5ee',\n 'sienna':'#a0522d',\n 'silver':'#c0c0c0',\n 'skyblue':'#87ceeb',\n 'slateblue':'#6a5acd',\n 'slategray':'#708090',\n 'slategrey':'#708090',\n 'snow':'#fffafa',\n 'springgreen':'#00ff7f',\n 'steelblue':'#4682b4',\n 'tan':'#d2b48c',\n 'teal':'#008080',\n 'thistle':'#d8bfd8',\n 'tomato':'#ff6347',\n 'turquoise':'#40e0d0',\n 'violet':'#ee82ee',\n 'wheat':'#f5deb3',\n 'white':'#ffffff',\n 'whitesmoke':'#f5f5f5',\n 'yellow':'#ffff00',\n 'yellowgreen':'#9acd32'\n};","export default {\n length: {\n 'm': 1,\n 'cm': 0.01,\n 'mm': 0.001,\n 'in': 0.0254,\n 'px': 0.0254 / 96,\n 'pt': 0.0254 / 72,\n 'pc': 0.0254 / 72 * 12\n },\n duration: {\n 's': 1,\n 'ms': 0.001\n },\n angle: {\n 'rad': 1 / (2 * Math.PI),\n 'deg': 1 / 360,\n 'grad': 1 / 400,\n 'turn': 1\n }\n};","import colors from './colors';\nimport unitConversions from './unit-conversions';\n\nexport default { colors, unitConversions };\n","class Node {\n constructor() {\n this.parent = null;\n this.visibilityBlocks = undefined;\n this.nodeVisible = undefined;\n this.rootNode = null;\n this.parsed = null;\n\n const self = this;\n Object.defineProperty(this, 'currentFileInfo', {\n get: function() { return self.fileInfo(); }\n });\n Object.defineProperty(this, 'index', {\n get: function() { return self.getIndex(); }\n });\n\n }\n\n setParent(nodes, parent) {\n function set(node) {\n if (node && node instanceof Node) {\n node.parent = parent;\n }\n }\n if (Array.isArray(nodes)) {\n nodes.forEach(set);\n }\n else {\n set(nodes);\n }\n }\n\n getIndex() {\n return this._index || (this.parent && this.parent.getIndex()) || 0;\n }\n\n fileInfo() {\n return this._fileInfo || (this.parent && this.parent.fileInfo()) || {};\n }\n\n isRulesetLike() {\n return false;\n }\n\n toCSS(context) {\n const strs = [];\n this.genCSS(context, {\n add: function(chunk, fileInfo, index) {\n strs.push(chunk);\n },\n isEmpty: function () {\n return strs.length === 0;\n }\n });\n return strs.join('');\n }\n\n genCSS(context, output) {\n output.add(this.value);\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval() { return this; }\n\n _operate(context, op, a, b) {\n switch (op) {\n case '+': return a + b;\n case '-': return a - b;\n case '*': return a * b;\n case '/': return a / b;\n }\n }\n\n fround(context, value) {\n const precision = context && context.numPrecision;\n // add \"epsilon\" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded:\n return (precision) ? Number((value + 2e-16).toFixed(precision)) : value;\n }\n\n // Returns true if this node represents root of ast imported by reference\n blocksVisibility() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n return this.visibilityBlocks !== 0;\n }\n\n addVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks + 1;\n }\n\n removeVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks - 1;\n }\n\n // Turns on node visibility - if called node will be shown in output regardless\n // of whether it comes from import by reference or not\n ensureVisibility() {\n this.nodeVisible = true;\n }\n\n // Turns off node visibility - if called node will NOT be shown in output regardless\n // of whether it comes from import by reference or not\n ensureInvisibility() {\n this.nodeVisible = false;\n }\n\n // return values:\n // false - the node must not be visible\n // true - the node must be visible\n // undefined or null - the node has the same visibility as its parent\n isVisible() {\n return this.nodeVisible;\n }\n\n visibilityInfo() {\n return {\n visibilityBlocks: this.visibilityBlocks,\n nodeVisible: this.nodeVisible\n };\n }\n\n copyVisibilityInfo(info) {\n if (!info) {\n return;\n }\n this.visibilityBlocks = info.visibilityBlocks;\n this.nodeVisible = info.nodeVisible;\n }\n}\n\nNode.compare = (a, b) => {\n /* returns:\n -1: a < b\n 0: a = b\n 1: a > b\n and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */\n\n if ((a.compare) &&\n // for \"symmetric results\" force toCSS-based comparison\n // of Quoted or Anonymous if either value is one of those\n !(b.type === 'Quoted' || b.type === 'Anonymous')) {\n return a.compare(b);\n } else if (b.compare) {\n return -b.compare(a);\n } else if (a.type !== b.type) {\n return undefined;\n }\n\n a = a.value;\n b = b.value;\n if (!Array.isArray(a)) {\n return a === b ? 0 : undefined;\n }\n if (a.length !== b.length) {\n return undefined;\n }\n for (let i = 0; i < a.length; i++) {\n if (Node.compare(a[i], b[i]) !== 0) {\n return undefined;\n }\n }\n return 0;\n};\n\nNode.numericCompare = (a, b) => a < b ? -1\n : a === b ? 0\n : a > b ? 1 : undefined;\nexport default Node;\n","import Node from './node';\nimport colors from '../data/colors';\n\n//\n// RGB Colors - #ff0014, #eee\n//\nclass Color extends Node {\n constructor(rgb, a, originalForm) {\n super();\n\n const self = this;\n //\n // The end goal here, is to parse the arguments\n // into an integer triplet, such as `128, 255, 0`\n //\n // This facilitates operations and conversions.\n //\n if (Array.isArray(rgb)) {\n this.rgb = rgb;\n } else if (rgb.length >= 6) {\n this.rgb = [];\n rgb.match(/.{2}/g).map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c, 16));\n } else {\n self.alpha = (parseInt(c, 16)) / 255;\n }\n });\n } else {\n this.rgb = [];\n rgb.split('').map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c + c, 16));\n } else {\n self.alpha = (parseInt(c + c, 16)) / 255;\n }\n });\n }\n this.alpha = this.alpha || (typeof a === 'number' ? a : 1);\n if (typeof originalForm !== 'undefined') {\n this.value = originalForm;\n }\n }\n\n luma() {\n let r = this.rgb[0] / 255;\n let g = this.rgb[1] / 255;\n let b = this.rgb[2] / 255;\n\n r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4);\n g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4);\n b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4);\n\n return 0.2126 * r + 0.7152 * g + 0.0722 * b;\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context, doNotCompress) {\n const compress = context && context.compress && !doNotCompress;\n let color;\n let alpha;\n let colorFunction;\n let args = [];\n\n // `value` is set if this color was originally\n // converted from a named color string so we need\n // to respect this and try to output named color too.\n alpha = this.fround(context, this.alpha);\n\n if (this.value) {\n if (this.value.indexOf('rgb') === 0) {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n } else if (this.value.indexOf('hsl') === 0) {\n if (alpha < 1) {\n colorFunction = 'hsla';\n } else {\n colorFunction = 'hsl';\n }\n } else {\n return this.value;\n }\n } else {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n }\n\n switch (colorFunction) {\n case 'rgba':\n args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1));\n break;\n case 'hsla':\n args.push(clamp(alpha, 1));\n case 'hsl':\n color = this.toHSL();\n args = [\n this.fround(context, color.h),\n `${this.fround(context, color.s * 100)}%`,\n `${this.fround(context, color.l * 100)}%`\n ].concat(args);\n }\n\n if (colorFunction) {\n // Values are capped between `0` and `255`, rounded and zero-padded.\n return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`;\n }\n\n color = this.toRGB();\n\n if (compress) {\n const splitcolor = color.split('');\n\n // Convert color to short format\n if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) {\n color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`;\n }\n }\n\n return color;\n }\n\n //\n // Operations have to be done per-channel, if not,\n // channels will spill onto each other. Once we have\n // our result, in the form of an integer triplet,\n // we create a new Color node to hold the result.\n //\n operate(context, op, other) {\n const rgb = new Array(3);\n const alpha = this.alpha * (1 - other.alpha) + other.alpha;\n for (let c = 0; c < 3; c++) {\n rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]);\n }\n return new Color(rgb, alpha);\n }\n\n toRGB() {\n return toHex(this.rgb);\n }\n\n toHSL() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const l = (max + min) / 2;\n const d = max - min;\n\n if (max === min) {\n h = s = 0;\n } else {\n s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, l, a };\n }\n\n // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript\n toHSV() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const v = max;\n\n const d = max - min;\n if (max === 0) {\n s = 0;\n } else {\n s = d / max;\n }\n\n if (max === min) {\n h = 0;\n } else {\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, v, a };\n }\n\n toARGB() {\n return toHex([this.alpha * 255].concat(this.rgb));\n }\n\n compare(x) {\n return (x.rgb &&\n x.rgb[0] === this.rgb[0] &&\n x.rgb[1] === this.rgb[1] &&\n x.rgb[2] === this.rgb[2] &&\n x.alpha === this.alpha) ? 0 : undefined;\n }\n}\n\nColor.prototype.type = 'Color';\n\nfunction clamp(v, max) {\n return Math.min(Math.max(v, 0), max);\n}\n\nfunction toHex(v) {\n return `#${v.map(c => {\n c = clamp(Math.round(c), 255);\n return (c < 16 ? '0' : '') + c.toString(16);\n }).join('')}`;\n}\n\nColor.fromKeyword = keyword => {\n let c;\n const key = keyword.toLowerCase();\n if (colors.hasOwnProperty(key)) {\n c = new Color(colors[key].slice(1));\n }\n else if (key === 'transparent') {\n c = new Color([0, 0, 0], 0);\n }\n\n if (c) {\n c.value = keyword;\n return c;\n }\n};\nexport default Color;\n","import Node from './node';\n\nclass Paren extends Node {\n constructor(node) {\n super();\n\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n return new Paren(this.value.eval(context));\n }\n}\n\nParen.prototype.type = 'Paren';\nexport default Paren;\n","import Node from './node';\nconst _noSpaceCombinators = {\n '': true,\n ' ': true,\n '|': true\n};\n\nclass Combinator extends Node {\n constructor(value) {\n super();\n\n if (value === ' ') {\n this.value = ' ';\n this.emptyOrWhitespace = true;\n } else {\n this.value = value ? value.trim() : '';\n this.emptyOrWhitespace = this.value === '';\n }\n }\n\n genCSS(context, output) {\n const spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' ';\n output.add(spaceOrEmpty + this.value + spaceOrEmpty);\n }\n}\n\nCombinator.prototype.type = 'Combinator';\n\nexport default Combinator;\n","import Node from './node';\nimport Paren from './paren';\nimport Combinator from './combinator';\n\nclass Element extends Node {\n constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.combinator = combinator instanceof Combinator ?\n combinator : new Combinator(combinator);\n\n if (typeof value === 'string') {\n this.value = value.trim();\n } else if (value) {\n this.value = value;\n } else {\n this.value = '';\n }\n this.isVariable = isVariable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.combinator, this);\n }\n\n accept(visitor) {\n const value = this.value;\n this.combinator = visitor.visit(this.combinator);\n if (typeof value === 'object') {\n this.value = visitor.visit(value);\n }\n }\n\n eval(context) {\n return new Element(this.combinator,\n this.value.eval ? this.value.eval(context) : this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n clone() {\n return new Element(this.combinator,\n this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context), this.fileInfo(), this.getIndex());\n }\n\n toCSS(context = {}) {\n let value = this.value;\n const firstSelector = context.firstSelector;\n if (value instanceof Paren) {\n // selector in parens should not be affected by outer selector\n // flags (breaks only interpolated selectors - see #1973)\n context.firstSelector = true;\n }\n value = value.toCSS ? value.toCSS(context) : value;\n context.firstSelector = firstSelector;\n if (value === '' && this.combinator.value.charAt(0) === '&') {\n return '';\n } else {\n return this.combinator.toCSS(context) + value;\n }\n }\n}\n\nElement.prototype.type = 'Element';\nexport default Element;\n","\nexport const Math = {\n ALWAYS: 0,\n PARENS_DIVISION: 1,\n PARENS: 2,\n STRICT_LEGACY: 3\n};\n\nexport const RewriteUrls = {\n OFF: 0,\n LOCAL: 1,\n ALL: 2\n};","var clone = (function() {\n'use strict';\n\nfunction _instanceof(obj, type) {\n return type != null && obj instanceof type;\n}\n\nvar nativeMap;\ntry {\n nativeMap = Map;\n} catch(_) {\n // maybe a reference error because no `Map`. Give it a dummy value that no\n // value will ever be an instanceof.\n nativeMap = function() {};\n}\n\nvar nativeSet;\ntry {\n nativeSet = Set;\n} catch(_) {\n nativeSet = function() {};\n}\n\nvar nativePromise;\ntry {\n nativePromise = Promise;\n} catch(_) {\n nativePromise = function() {};\n}\n\n/**\n * Clones (copies) an Object using deep copying.\n *\n * This function supports circular references by default, but if you are certain\n * there are no circular references in your object, you can save some CPU time\n * by calling clone(obj, false).\n *\n * Caution: if `circular` is false and `parent` contains circular references,\n * your program may enter an infinite loop and crash.\n *\n * @param `parent` - the object to be cloned\n * @param `circular` - set to true if the object to be cloned may contain\n * circular references. (optional - true by default)\n * @param `depth` - set to a number if the object is only to be cloned to\n * a particular depth. (optional - defaults to Infinity)\n * @param `prototype` - sets the prototype to be used when cloning an object.\n * (optional - defaults to parent prototype).\n * @param `includeNonEnumerable` - set to true if the non-enumerable properties\n * should be cloned as well. Non-enumerable properties on the prototype\n * chain will be ignored. (optional - false by default)\n*/\nfunction clone(parent, circular, depth, prototype, includeNonEnumerable) {\n if (typeof circular === 'object') {\n depth = circular.depth;\n prototype = circular.prototype;\n includeNonEnumerable = circular.includeNonEnumerable;\n circular = circular.circular;\n }\n // maintain two arrays for circular references, where corresponding parents\n // and children have the same index\n var allParents = [];\n var allChildren = [];\n\n var useBuffer = typeof Buffer != 'undefined';\n\n if (typeof circular == 'undefined')\n circular = true;\n\n if (typeof depth == 'undefined')\n depth = Infinity;\n\n // recurse this function so we don't reset allParents and allChildren\n function _clone(parent, depth) {\n // cloning null always returns null\n if (parent === null)\n return null;\n\n if (depth === 0)\n return parent;\n\n var child;\n var proto;\n if (typeof parent != 'object') {\n return parent;\n }\n\n if (_instanceof(parent, nativeMap)) {\n child = new nativeMap();\n } else if (_instanceof(parent, nativeSet)) {\n child = new nativeSet();\n } else if (_instanceof(parent, nativePromise)) {\n child = new nativePromise(function (resolve, reject) {\n parent.then(function(value) {\n resolve(_clone(value, depth - 1));\n }, function(err) {\n reject(_clone(err, depth - 1));\n });\n });\n } else if (clone.__isArray(parent)) {\n child = [];\n } else if (clone.__isRegExp(parent)) {\n child = new RegExp(parent.source, __getRegExpFlags(parent));\n if (parent.lastIndex) child.lastIndex = parent.lastIndex;\n } else if (clone.__isDate(parent)) {\n child = new Date(parent.getTime());\n } else if (useBuffer && Buffer.isBuffer(parent)) {\n if (Buffer.allocUnsafe) {\n // Node.js >= 4.5.0\n child = Buffer.allocUnsafe(parent.length);\n } else {\n // Older Node.js versions\n child = new Buffer(parent.length);\n }\n parent.copy(child);\n return child;\n } else if (_instanceof(parent, Error)) {\n child = Object.create(parent);\n } else {\n if (typeof prototype == 'undefined') {\n proto = Object.getPrototypeOf(parent);\n child = Object.create(proto);\n }\n else {\n child = Object.create(prototype);\n proto = prototype;\n }\n }\n\n if (circular) {\n var index = allParents.indexOf(parent);\n\n if (index != -1) {\n return allChildren[index];\n }\n allParents.push(parent);\n allChildren.push(child);\n }\n\n if (_instanceof(parent, nativeMap)) {\n parent.forEach(function(value, key) {\n var keyChild = _clone(key, depth - 1);\n var valueChild = _clone(value, depth - 1);\n child.set(keyChild, valueChild);\n });\n }\n if (_instanceof(parent, nativeSet)) {\n parent.forEach(function(value) {\n var entryChild = _clone(value, depth - 1);\n child.add(entryChild);\n });\n }\n\n for (var i in parent) {\n var attrs;\n if (proto) {\n attrs = Object.getOwnPropertyDescriptor(proto, i);\n }\n\n if (attrs && attrs.set == null) {\n continue;\n }\n child[i] = _clone(parent[i], depth - 1);\n }\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(parent);\n for (var i = 0; i < symbols.length; i++) {\n // Don't need to worry about cloning a symbol because it is a primitive,\n // like a number or string.\n var symbol = symbols[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, symbol);\n if (descriptor && !descriptor.enumerable && !includeNonEnumerable) {\n continue;\n }\n child[symbol] = _clone(parent[symbol], depth - 1);\n if (!descriptor.enumerable) {\n Object.defineProperty(child, symbol, {\n enumerable: false\n });\n }\n }\n }\n\n if (includeNonEnumerable) {\n var allPropertyNames = Object.getOwnPropertyNames(parent);\n for (var i = 0; i < allPropertyNames.length; i++) {\n var propertyName = allPropertyNames[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, propertyName);\n if (descriptor && descriptor.enumerable) {\n continue;\n }\n child[propertyName] = _clone(parent[propertyName], depth - 1);\n Object.defineProperty(child, propertyName, {\n enumerable: false\n });\n }\n }\n\n return child;\n }\n\n return _clone(parent, depth);\n}\n\n/**\n * Simple flat clone using prototype, accepts only objects, usefull for property\n * override on FLAT configuration object (no nested props).\n *\n * USE WITH CAUTION! This may not behave as you wish if you do not know how this\n * works.\n */\nclone.clonePrototype = function clonePrototype(parent) {\n if (parent === null)\n return null;\n\n var c = function () {};\n c.prototype = parent;\n return new c();\n};\n\n// private utility functions\n\nfunction __objToStr(o) {\n return Object.prototype.toString.call(o);\n}\nclone.__objToStr = __objToStr;\n\nfunction __isDate(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Date]';\n}\nclone.__isDate = __isDate;\n\nfunction __isArray(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Array]';\n}\nclone.__isArray = __isArray;\n\nfunction __isRegExp(o) {\n return typeof o === 'object' && __objToStr(o) === '[object RegExp]';\n}\nclone.__isRegExp = __isRegExp;\n\nfunction __getRegExpFlags(re) {\n var flags = '';\n if (re.global) flags += 'g';\n if (re.ignoreCase) flags += 'i';\n if (re.multiline) flags += 'm';\n return flags;\n}\nclone.__getRegExpFlags = __getRegExpFlags;\n\nreturn clone;\n})();\n\nif (typeof module === 'object' && module.exports) {\n module.exports = clone;\n}\n","/* jshint proto: true */\nimport * as Constants from './constants';\nimport CloneHelper from 'clone';\n\nexport function getLocation(index, inputStream) {\n let n = index + 1;\n let line = null;\n let column = -1;\n\n while (--n >= 0 && inputStream.charAt(n) !== '\\n') {\n column++;\n }\n\n if (typeof index === 'number') {\n line = (inputStream.slice(0, index).match(/\\n/g) || '').length;\n }\n\n return {\n line,\n column\n };\n}\n\nexport function copyArray(arr) {\n let i;\n const length = arr.length;\n const copy = new Array(length);\n\n for (i = 0; i < length; i++) {\n copy[i] = arr[i];\n }\n return copy;\n}\n\nexport function clone(obj) {\n const cloned = {};\n for (const prop in obj) {\n if (obj.hasOwnProperty(prop)) {\n cloned[prop] = obj[prop];\n }\n }\n return cloned;\n}\n\nexport function defaults(obj1, obj2) {\n let newObj = obj2 || {};\n if (!obj2._defaults) {\n newObj = {};\n const defaults = CloneHelper(obj1);\n newObj._defaults = defaults;\n const cloned = obj2 ? CloneHelper(obj2) : {};\n Object.assign(newObj, defaults, cloned);\n }\n return newObj;\n}\n\nexport function copyOptions(obj1, obj2) {\n if (obj2 && obj2._defaults) {\n return obj2;\n }\n const opts = defaults(obj1, obj2);\n if (opts.strictMath) {\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n // Back compat with changed relativeUrls option\n if (opts.relativeUrls) {\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n }\n if (typeof opts.math === 'string') {\n switch (opts.math.toLowerCase()) {\n case 'always':\n opts.math = Constants.Math.ALWAYS;\n break;\n case 'parens-division':\n opts.math = Constants.Math.PARENS_DIVISION;\n break;\n case 'strict':\n case 'parens':\n opts.math = Constants.Math.PARENS;\n break;\n case 'strict-legacy':\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n }\n if (typeof opts.rewriteUrls === 'string') {\n switch (opts.rewriteUrls.toLowerCase()) {\n case 'off':\n opts.rewriteUrls = Constants.RewriteUrls.OFF;\n break;\n case 'local':\n opts.rewriteUrls = Constants.RewriteUrls.LOCAL;\n break;\n case 'all':\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n break;\n }\n }\n return opts;\n}\n\nexport function merge(obj1, obj2) {\n for (const prop in obj2) {\n if (obj2.hasOwnProperty(prop)) {\n obj1[prop] = obj2[prop];\n }\n }\n return obj1;\n}\n\nexport function flattenArray(arr, result = []) {\n for (let i = 0, length = arr.length; i < length; i++) {\n const value = arr[i];\n if (Array.isArray(value)) {\n flattenArray(value, result);\n } else {\n if (value !== undefined) {\n result.push(value);\n }\n }\n }\n return result;\n}","import * as utils from './utils';\n/**\n * This is a centralized class of any error that could be thrown internally (mostly by the parser).\n * Besides standard .message it keeps some additional data like a path to the file where the error\n * occurred along with line and column numbers.\n *\n * @class\n * @extends Error\n * @type {module.LessError}\n *\n * @prop {string} type\n * @prop {string} filename\n * @prop {number} index\n * @prop {number} line\n * @prop {number} column\n * @prop {number} callLine\n * @prop {number} callExtract\n * @prop {string[]} extract\n *\n * @param {Object} e - An error object to wrap around or just a descriptive object\n * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager?\n * @param {string} [currentFilename]\n */\nconst LessError = function LessError(e, fileContentMap, currentFilename) {\n Error.call(this);\n\n const filename = e.filename || currentFilename;\n\n this.message = e.message;\n this.stack = e.stack;\n\n if (fileContentMap && filename) {\n const input = fileContentMap.contents[filename];\n const loc = utils.getLocation(e.index, input);\n const line = loc.line;\n const col = loc.column;\n const callLine = e.call && utils.getLocation(e.call, input).line;\n const lines = input ? input.split('\\n') : '';\n\n this.type = e.type || 'Syntax';\n this.filename = filename;\n this.index = e.index;\n this.line = typeof line === 'number' ? line + 1 : null;\n this.column = col;\n\n if (!this.line && this.stack) {\n const found = this.stack.match(/(|Function):(\\d+):(\\d+)/);\n\n if (found) {\n if (found[2]) {\n this.line = parseInt(found[2]) - 2;\n }\n if (found[3]) {\n this.column = parseInt(found[3]);\n }\n }\n }\n\n this.callLine = callLine + 1;\n this.callExtract = lines[callLine];\n\n this.extract = [\n lines[this.line - 2],\n lines[this.line - 1],\n lines[this.line]\n ];\n }\n\n};\n\nif (typeof Object.create === 'undefined') {\n const F = () => {};\n F.prototype = Error.prototype;\n LessError.prototype = new F();\n} else {\n LessError.prototype = Object.create(Error.prototype);\n}\n\nLessError.prototype.constructor = LessError;\n\n/**\n * An overridden version of the default Object.prototype.toString\n * which uses additional information to create a helpful message.\n *\n * @param {Object} options\n * @returns {string}\n */\nLessError.prototype.toString = function(options = {}) {\n let message = '';\n const extract = this.extract || [];\n let error = [];\n let stylize = str => str;\n if (options.stylize) {\n const type = typeof options.stylize;\n if (type !== 'function') {\n throw Error(`options.stylize should be a function, got a ${type}!`);\n }\n stylize = options.stylize;\n }\n\n if (this.line !== null) {\n if (typeof extract[0] === 'string') {\n error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey'));\n }\n\n if (typeof extract[1] === 'string') {\n let errorTxt = `${this.line} `;\n if (extract[1]) {\n errorTxt += extract[1].slice(0, this.column) +\n stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') +\n extract[1].slice(this.column + 1), 'red'), 'inverse');\n }\n error.push(errorTxt);\n }\n\n if (typeof extract[2] === 'string') {\n error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey'));\n }\n error = `${error.join('\\n') + stylize('', 'reset')}\\n`;\n }\n\n message += stylize(`${this.type}Error: ${this.message}`, 'red');\n if (this.filename) {\n message += stylize(' in ', 'red') + this.filename;\n }\n if (this.line) {\n message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey');\n }\n\n message += `\\n${error}`;\n\n if (this.callLine) {\n message += `${stylize('from ', 'red') + (this.filename || '')}/n`;\n message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`;\n }\n\n return message;\n};\n\nexport default LessError;","import Node from './node';\nimport Element from './element';\nimport LessError from '../less-error';\n\nclass Selector extends Node {\n constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.extendList = extendList;\n this.condition = condition;\n this.evaldCondition = !condition;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.elements = this.getElements(elements);\n this.mixinElements_ = undefined;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.elements, this);\n }\n\n accept(visitor) {\n if (this.elements) {\n this.elements = visitor.visitArray(this.elements);\n }\n if (this.extendList) {\n this.extendList = visitor.visitArray(this.extendList);\n }\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n createDerived(elements, extendList, evaldCondition) {\n elements = this.getElements(elements);\n const newSelector = new Selector(elements, extendList || this.extendList,\n null, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition;\n newSelector.mediaEmpty = this.mediaEmpty;\n return newSelector;\n }\n\n getElements(els) {\n if (!els) {\n return [new Element('', '&', false, this._index, this._fileInfo)];\n }\n if (typeof els === 'string') {\n this.parse.parseNode(\n els, \n ['selector'],\n this._index, \n this._fileInfo, \n function(err, result) {\n if (err) {\n throw new LessError({\n index: err.index,\n message: err.message\n }, this.parse.imports, this._fileInfo.filename);\n }\n els = result[0].elements;\n });\n }\n return els;\n }\n\n createEmptySelectors() {\n const el = new Element('', '&', false, this._index, this._fileInfo);\n const sels = [new Selector([el], null, null, this._index, this._fileInfo)];\n sels[0].mediaEmpty = true;\n return sels;\n }\n\n match(other) {\n const elements = this.elements;\n const len = elements.length;\n let olen;\n let i;\n\n other = other.mixinElements();\n olen = other.length;\n if (olen === 0 || len < olen) {\n return 0;\n } else {\n for (i = 0; i < olen; i++) {\n if (elements[i].value !== other[i]) {\n return 0;\n }\n }\n }\n\n return olen; // return number of matched elements\n }\n\n mixinElements() {\n if (this.mixinElements_) {\n return this.mixinElements_;\n }\n\n let elements = this.elements.map( v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\\*\\.\\w-]([\\w-]|(\\\\.))*/g);\n\n if (elements) {\n if (elements[0] === '&') {\n elements.shift();\n }\n } else {\n elements = [];\n }\n\n return (this.mixinElements_ = elements);\n }\n\n isJustParentSelector() {\n return !this.mediaEmpty &&\n this.elements.length === 1 &&\n this.elements[0].value === '&' &&\n (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === '');\n }\n\n eval(context) {\n const evaldCondition = this.condition && this.condition.eval(context);\n let elements = this.elements;\n let extendList = this.extendList;\n\n elements = elements && elements.map(e => e.eval(context));\n extendList = extendList && extendList.map(extend => extend.eval(context));\n\n return this.createDerived(elements, extendList, evaldCondition);\n }\n\n genCSS(context, output) {\n let i;\n let element;\n if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') {\n output.add(' ', this.fileInfo(), this.getIndex());\n }\n for (i = 0; i < this.elements.length; i++) {\n element = this.elements[i];\n element.genCSS(context, output);\n }\n }\n\n getIsOutput() {\n return this.evaldCondition;\n }\n}\n\nSelector.prototype.type = 'Selector';\nexport default Selector;\n","import Node from './node';\n\nclass Value extends Node {\n constructor(value) {\n super();\n\n if (!value) {\n throw new Error('Value requires an array argument');\n }\n if (!Array.isArray(value)) {\n this.value = [ value ];\n }\n else {\n this.value = value;\n }\n }\n\n accept(visitor) {\n if (this.value) {\n this.value = visitor.visitArray(this.value);\n }\n }\n\n eval(context) {\n if (this.value.length === 1) {\n return this.value[0].eval(context);\n } else {\n return new Value(this.value.map(v => v.eval(context)));\n }\n }\n\n genCSS(context, output) {\n let i;\n for (i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (i + 1 < this.value.length) {\n output.add((context && context.compress) ? ',' : ', ');\n }\n }\n }\n}\n\nValue.prototype.type = 'Value';\nexport default Value;\n","import Node from './node';\n\nclass Keyword extends Node {\n constructor(value) {\n super();\n\n this.value = value;\n }\n\n genCSS(context, output) {\n if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; }\n output.add(this.value);\n }\n}\n\nKeyword.prototype.type = 'Keyword';\n\nKeyword.True = new Keyword('true');\nKeyword.False = new Keyword('false');\n\nexport default Keyword;\n","import Node from './node';\n\nclass Anonymous extends Node {\n constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) {\n super();\n\n this.value = value;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.mapLines = mapLines;\n this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike;\n this.allowRoot = true;\n this.copyVisibilityInfo(visibilityInfo);\n }\n\n eval() {\n return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo());\n }\n\n compare(other) {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n\n isRulesetLike() {\n return this.rulesetLike;\n }\n\n genCSS(context, output) {\n this.nodeVisible = Boolean(this.value);\n if (this.nodeVisible) {\n output.add(this.value, this._fileInfo, this._index, this.mapLines);\n }\n }\n}\n\nAnonymous.prototype.type = 'Anonymous';\nexport default Anonymous;\n","import Node from './node';\nimport Value from './value';\nimport Keyword from './keyword';\nimport Anonymous from './anonymous';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Declaration extends Node {\n constructor(name, value, important, merge, index, currentFileInfo, inline, variable) {\n super();\n\n this.name = name;\n this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]);\n this.important = important ? ` ${important.trim()}` : '';\n this.merge = merge;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.inline = inline || false;\n this.variable = (variable !== undefined) ? variable\n : (name.charAt && (name.charAt(0) === '@'));\n this.allowRoot = true;\n this.setParent(this.value, this);\n }\n\n genCSS(context, output) {\n output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex());\n try {\n this.value.genCSS(context, output);\n }\n catch (e) {\n e.index = this._index;\n e.filename = this._fileInfo.filename;\n throw e;\n }\n output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index);\n }\n\n eval(context) {\n let mathBypass = false;\n let prevMath;\n let name = this.name;\n let evaldValue;\n let variable = this.variable;\n if (typeof name !== 'string') {\n // expand 'primitive' name directly to get\n // things faster (~10% for benchmark.less):\n name = (name.length === 1) && (name[0] instanceof Keyword) ?\n name[0].value : evalName(context, name);\n variable = false; // never treat expanded interpolation as new variable name\n }\n\n // @todo remove when parens-division is default\n if (name === 'font' && context.math === MATH.ALWAYS) {\n mathBypass = true;\n prevMath = context.math;\n context.math = MATH.PARENS_DIVISION;\n }\n try {\n context.importantScope.push({});\n evaldValue = this.value.eval(context);\n\n if (!this.variable && evaldValue.type === 'DetachedRuleset') {\n throw { message: 'Rulesets cannot be evaluated on a property.',\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n let important = this.important;\n const importantResult = context.importantScope.pop();\n if (!important && importantResult.important) {\n important = importantResult.important;\n }\n\n return new Declaration(name,\n evaldValue,\n important,\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline,\n variable);\n }\n catch (e) {\n if (typeof e.index !== 'number') {\n e.index = this.getIndex();\n e.filename = this.fileInfo().filename;\n }\n throw e;\n }\n finally {\n if (mathBypass) {\n context.math = prevMath;\n }\n }\n }\n\n makeImportant() {\n return new Declaration(this.name,\n this.value,\n '!important',\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline);\n }\n}\n\nfunction evalName(context, name) {\n let value = '';\n let i;\n const n = name.length;\n const output = {add: function (s) {value += s;}};\n for (i = 0; i < n; i++) {\n name[i].eval(context).genCSS(context, output);\n }\n return value;\n}\n\nDeclaration.prototype.type = 'Declaration';\nexport default Declaration;","const debugInfo = (context, ctx, lineSeparator) => {\n let result = '';\n if (context.dumpLineNumbers && !context.compress) {\n switch (context.dumpLineNumbers) {\n case 'comments':\n result = debugInfo.asComment(ctx);\n break;\n case 'mediaquery':\n result = debugInfo.asMediaQuery(ctx);\n break;\n case 'all':\n result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx);\n break;\n }\n }\n return result;\n};\n\ndebugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\\n`;\n\ndebugInfo.asMediaQuery = ctx => {\n let filenameWithProtocol = ctx.debugInfo.fileName;\n if (!/^[a-z]+:\\/\\//i.test(filenameWithProtocol)) {\n filenameWithProtocol = `file://${filenameWithProtocol}`;\n }\n return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\\/\\\\])/g, a => {\n if (a == '\\\\') {\n a = '\\/';\n }\n return `\\\\${a}`;\n })}}line{font-family:\\\\00003${ctx.debugInfo.lineNumber}}}\\n`;\n};\n\nexport default debugInfo;\n","import Node from './node';\nimport getDebugInfo from './debug-info';\n\nclass Comment extends Node {\n constructor(value, isLineComment, index, currentFileInfo) {\n super();\n\n this.value = value;\n this.isLineComment = isLineComment;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n genCSS(context, output) {\n if (this.debugInfo) {\n output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n }\n\n isSilent(context) {\n const isCompressed = context.compress && this.value[2] !== '!';\n return this.isLineComment || isCompressed;\n }\n}\n\nComment.prototype.type = 'Comment';\nexport default Comment;\n","const contexts = {};\nexport default contexts;\nimport * as Constants from './constants';\n\nconst copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) {\n if (!original) { return; }\n\n for (let i = 0; i < propertiesToCopy.length; i++) {\n if (original.hasOwnProperty(propertiesToCopy[i])) {\n destination[propertiesToCopy[i]] = original[propertiesToCopy[i]];\n }\n }\n};\n\n/*\n parse is used whilst parsing\n */\nconst parseCopyProperties = [\n // options\n 'paths', // option - unmodified - paths to search for imports on\n 'rewriteUrls', // option - whether to adjust URL's to be relative\n 'rootpath', // option - rootpath to append to URL's\n 'strictImports', // option -\n 'insecure', // option - whether to allow imports from insecure ssl hosts\n 'dumpLineNumbers', // option - whether to dump line numbers\n 'compress', // option - whether to compress\n 'syncImport', // option - whether to import synchronously\n 'chunkInput', // option - whether to chunk input. more performant but causes parse issues.\n 'mime', // browser only - mime type for sheet import\n 'useFileCache', // browser only - whether to use the per file session cache\n // context\n 'processImports', // option & context - whether to process imports. if false then imports will not be imported.\n // Used by the import manager to stop multiple import visitors being created.\n 'pluginManager' // Used as the plugin manager for the session\n];\n\ncontexts.Parse = function(options) {\n copyFromOriginal(options, this, parseCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n};\n\nconst evalCopyProperties = [\n 'paths', // additional include paths\n 'compress', // whether to compress\n 'math', // whether math has to be within parenthesis\n 'strictUnits', // whether units need to evaluate correctly\n 'sourceMap', // whether to output a source map\n 'importMultiple', // whether we are currently importing multiple copies\n 'urlArgs', // whether to add args into url tokens\n 'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false\n 'pluginManager', // Used as the plugin manager for the session\n 'importantScope', // used to bubble up !important statements\n 'rewriteUrls' // option - whether to adjust URL's to be relative\n];\n\nfunction isPathRelative(path) {\n return !/^(?:[a-z-]+:|\\/|#)/i.test(path);\n}\n\nfunction isPathLocalRelative(path) {\n return path.charAt(0) === '.';\n}\n\ncontexts.Eval = class {\n constructor(options, frames) {\n copyFromOriginal(options, this, evalCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n\n this.frames = frames || [];\n this.importantScope = this.importantScope || [];\n this.inCalc = false;\n this.mathOn = true;\n }\n\n enterCalc() {\n if (!this.calcStack) {\n this.calcStack = [];\n }\n this.calcStack.push(true);\n this.inCalc = true;\n }\n\n exitCalc() {\n this.calcStack.pop();\n if (!this.calcStack) {\n this.inCalc = false;\n }\n }\n\n inParenthesis() {\n if (!this.parensStack) {\n this.parensStack = [];\n }\n this.parensStack.push(true);\n };\n\n outOfParenthesis() {\n this.parensStack.pop();\n };\n\n isMathOn(op) {\n if (!this.mathOn) {\n return false;\n }\n if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) {\n return false;\n }\n if (this.math > Constants.Math.PARENS_DIVISION) {\n return this.parensStack && this.parensStack.length;\n }\n return true;\n }\n\n pathRequiresRewrite(path) {\n const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative;\n\n return isRelative(path);\n }\n\n rewritePath(path, rootpath) {\n let newPath;\n\n rootpath = rootpath || '';\n newPath = this.normalizePath(rootpath + path);\n\n // If a path was explicit relative and the rootpath was not an absolute path\n // we must ensure that the new path is also explicit relative.\n if (isPathLocalRelative(path) &&\n isPathRelative(rootpath) &&\n isPathLocalRelative(newPath) === false) {\n newPath = `./${newPath}`;\n }\n\n return newPath;\n }\n\n normalizePath(path) {\n const segments = path.split('/').reverse();\n let segment;\n\n path = [];\n while (segments.length !== 0) {\n segment = segments.pop();\n switch ( segment ) {\n case '.':\n break;\n case '..':\n if ((path.length === 0) || (path[path.length - 1] === '..')) {\n path.push( segment );\n } else {\n path.pop();\n }\n break;\n default:\n path.push(segment);\n break;\n }\n }\n\n return path.join('/');\n }\n}\n","function makeRegistry( base ) {\n return {\n _data: {},\n add: function(name, func) {\n // precautionary case conversion, as later querying of\n // the registry by function-caller uses lower case as well.\n name = name.toLowerCase();\n\n if (this._data.hasOwnProperty(name)) {\n // TODO warn\n }\n this._data[name] = func;\n },\n addMultiple: function(functions) {\n Object.keys(functions).forEach(\n name => {\n this.add(name, functions[name]);\n });\n },\n get: function(name) {\n return this._data[name] || ( base && base.get( name ));\n },\n getLocalFunctions: function() {\n return this._data;\n },\n inherit: function() {\n return makeRegistry( this );\n },\n create: function(base) {\n return makeRegistry(base);\n }\n };\n}\n\nexport default makeRegistry( null );","import Keyword from '../tree/keyword';\n\nconst defaultFunc = {\n eval: function () {\n const v = this.value_;\n const e = this.error_;\n if (e) {\n throw e;\n }\n if (v != null) {\n return v ? Keyword.True : Keyword.False;\n }\n },\n value: function (v) {\n this.value_ = v;\n },\n error: function (e) {\n this.error_ = e;\n },\n reset: function () {\n this.value_ = this.error_ = null;\n }\n};\n\nexport default defaultFunc;\n","import Node from './node';\nimport Declaration from './declaration';\nimport Keyword from './keyword';\nimport Comment from './comment';\nimport Paren from './paren';\nimport Selector from './selector';\nimport Element from './element';\nimport Anonymous from './anonymous';\nimport contexts from '../contexts';\nimport globalFunctionRegistry from '../functions/function-registry';\nimport defaultFunc from '../functions/default';\nimport getDebugInfo from './debug-info';\nimport * as utils from '../utils';\n\nclass Ruleset extends Node {\n constructor(selectors, rules, strictImports, visibilityInfo) {\n super();\n\n this.selectors = selectors;\n this.rules = rules;\n this._lookups = {};\n this._variables = null;\n this._properties = null;\n this.strictImports = strictImports;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n this.setParent(this.selectors, this);\n this.setParent(this.rules, this);\n\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.paths) {\n this.paths = visitor.visitArray(this.paths, true);\n } else if (this.selectors) {\n this.selectors = visitor.visitArray(this.selectors);\n }\n if (this.rules && this.rules.length) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n eval(context) {\n const that = this;\n let selectors;\n let selCnt;\n let selector;\n let i;\n let hasVariable;\n let hasOnePassingSelector = false;\n\n if (this.selectors && (selCnt = this.selectors.length)) {\n selectors = new Array(selCnt);\n defaultFunc.error({\n type: 'Syntax',\n message: 'it is currently only allowed in parametric mixin guards,'\n });\n\n for (i = 0; i < selCnt; i++) {\n selector = this.selectors[i].eval(context);\n for (var j = 0; j < selector.elements.length; j++) {\n if (selector.elements[j].isVariable) {\n hasVariable = true;\n break;\n }\n }\n selectors[i] = selector;\n if (selector.evaldCondition) {\n hasOnePassingSelector = true;\n }\n }\n\n if (hasVariable) {\n const toParseSelectors = new Array(selCnt);\n for (i = 0; i < selCnt; i++) {\n selector = selectors[i];\n toParseSelectors[i] = selector.toCSS(context);\n }\n this.parse.parseNode(\n toParseSelectors.join(','),\n [\"selectors\"], \n selectors[0].getIndex(), \n selectors[0].fileInfo(), \n (err, result) => {\n if (result) {\n selectors = utils.flattenArray(result);\n }\n });\n }\n\n defaultFunc.reset();\n } else {\n hasOnePassingSelector = true;\n }\n\n let rules = this.rules ? utils.copyArray(this.rules) : null;\n const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo());\n let rule;\n let subRule;\n\n ruleset.originalRuleset = this;\n ruleset.root = this.root;\n ruleset.firstRoot = this.firstRoot;\n ruleset.allowImports = this.allowImports;\n\n if (this.debugInfo) {\n ruleset.debugInfo = this.debugInfo;\n }\n\n if (!hasOnePassingSelector) {\n rules.length = 0;\n }\n\n // inherit a function registry from the frames stack when possible;\n // otherwise from the global registry\n ruleset.functionRegistry = (frames => {\n let i = 0;\n const n = frames.length;\n let found;\n for ( ; i !== n ; ++i ) {\n found = frames[ i ].functionRegistry;\n if ( found ) { return found; }\n }\n return globalFunctionRegistry;\n })(context.frames).inherit();\n\n // push the current ruleset to the frames stack\n const ctxFrames = context.frames;\n ctxFrames.unshift(ruleset);\n\n // currrent selectors\n let ctxSelectors = context.selectors;\n if (!ctxSelectors) {\n context.selectors = ctxSelectors = [];\n }\n ctxSelectors.unshift(this.selectors);\n\n // Evaluate imports\n if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {\n ruleset.evalImports(context);\n }\n\n // Store the frames around mixin definitions,\n // so they can be evaluated like closures when the time comes.\n const rsRules = ruleset.rules;\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.evalFirst) {\n rsRules[i] = rule.eval(context);\n }\n }\n\n const mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0;\n\n // Evaluate mixin calls.\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.type === 'MixinCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope if the variable is\n // already there. consider returning false here\n // but we need a way to \"return\" variable from mixins\n return !(ruleset.variable(r.name));\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n } else if (rule.type === 'VariableCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).rules.filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope at all\n return false;\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n if (!rule.evalFirst) {\n rsRules[i] = rule = rule.eval ? rule.eval(context) : rule;\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n // for rulesets, check if it is a css guard and can be removed\n if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) {\n // check if it can be folded in (e.g. & where)\n if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) {\n rsRules.splice(i--, 1);\n\n for (var j = 0; (subRule = rule.rules[j]); j++) {\n if (subRule instanceof Node) {\n subRule.copyVisibilityInfo(rule.visibilityInfo());\n if (!(subRule instanceof Declaration) || !subRule.variable) {\n rsRules.splice(++i, 0, subRule);\n }\n }\n }\n }\n }\n }\n\n // Pop the stack\n ctxFrames.shift();\n ctxSelectors.shift();\n\n if (context.mediaBlocks) {\n for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) {\n context.mediaBlocks[i].bubbleSelectors(selectors);\n }\n }\n\n return ruleset;\n }\n\n evalImports(context) {\n const rules = this.rules;\n let i;\n let importRules;\n if (!rules) { return; }\n\n for (i = 0; i < rules.length; i++) {\n if (rules[i].type === 'Import') {\n importRules = rules[i].eval(context);\n if (importRules && (importRules.length || importRules.length === 0)) {\n rules.splice(...[i, 1].concat(importRules));\n i += importRules.length - 1;\n } else {\n rules.splice(i, 1, importRules);\n }\n this.resetCache();\n }\n }\n }\n\n makeImportant() {\n const result = new Ruleset(this.selectors, this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant();\n } else {\n return r;\n }\n }), this.strictImports, this.visibilityInfo());\n\n return result;\n }\n\n matchArgs(args) {\n return !args || args.length === 0;\n }\n\n // lets you call a css selector with a guard\n matchCondition(args, context) {\n const lastSelector = this.selectors[this.selectors.length - 1];\n if (!lastSelector.evaldCondition) {\n return false;\n }\n if (lastSelector.condition &&\n !lastSelector.condition.eval(\n new contexts.Eval(context,\n context.frames))) {\n return false;\n }\n return true;\n }\n\n resetCache() {\n this._rulesets = null;\n this._variables = null;\n this._properties = null;\n this._lookups = {};\n }\n\n variables() {\n if (!this._variables) {\n this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable === true) {\n hash[r.name] = r;\n }\n // when evaluating variables in an import statement, imports have not been eval'd\n // so we need to go inside import statements.\n // guard against root being a string (in the case of inlined less)\n if (r.type === 'Import' && r.root && r.root.variables) {\n const vars = r.root.variables();\n for (const name in vars) {\n if (vars.hasOwnProperty(name)) {\n hash[name] = r.root.variable(name);\n }\n }\n }\n return hash;\n }, {});\n }\n return this._variables;\n }\n\n properties() {\n if (!this._properties) {\n this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable !== true) {\n const name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ?\n r.name[0].value : r.name;\n // Properties don't overwrite as they can merge\n if (!hash[`$${name}`]) {\n hash[`$${name}`] = [ r ];\n }\n else {\n hash[`$${name}`].push(r);\n }\n }\n return hash;\n }, {});\n }\n return this._properties;\n }\n\n variable(name) {\n const decl = this.variables()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n property(name) {\n const decl = this.properties()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n lastDeclaration() {\n for (let i = this.rules.length; i > 0; i--) {\n const decl = this.rules[i - 1];\n if (decl instanceof Declaration) {\n return this.parseValue(decl);\n }\n }\n }\n\n parseValue(toParse) {\n const self = this;\n function transformDeclaration(decl) {\n if (decl.value instanceof Anonymous && !decl.parsed) {\n if (typeof decl.value.value === 'string') {\n this.parse.parseNode(\n decl.value.value,\n ['value', 'important'], \n decl.value.getIndex(), \n decl.fileInfo(), \n (err, result) => {\n if (err) {\n decl.parsed = true;\n }\n if (result) {\n decl.value = result[0];\n decl.important = result[1] || '';\n decl.parsed = true;\n }\n });\n } else {\n decl.parsed = true;\n }\n\n return decl;\n }\n else {\n return decl;\n }\n }\n if (!Array.isArray(toParse)) {\n return transformDeclaration.call(self, toParse);\n }\n else {\n const nodes = [];\n toParse.forEach(n => {\n nodes.push(transformDeclaration.call(self, n));\n });\n return nodes;\n }\n }\n\n rulesets() {\n if (!this.rules) { return []; }\n\n const filtRules = [];\n const rules = this.rules;\n let i;\n let rule;\n\n for (i = 0; (rule = rules[i]); i++) {\n if (rule.isRuleset) {\n filtRules.push(rule);\n }\n }\n\n return filtRules;\n }\n\n prependRule(rule) {\n const rules = this.rules;\n if (rules) {\n rules.unshift(rule);\n } else {\n this.rules = [ rule ];\n }\n this.setParent(rule, this);\n }\n\n find(selector, self = this, filter) {\n const rules = [];\n let match;\n let foundMixins;\n const key = selector.toCSS();\n\n if (key in this._lookups) { return this._lookups[key]; }\n\n this.rulesets().forEach(rule => {\n if (rule !== self) {\n for (let j = 0; j < rule.selectors.length; j++) {\n match = selector.match(rule.selectors[j]);\n if (match) {\n if (selector.elements.length > match) {\n if (!filter || filter(rule)) {\n foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter);\n for (let i = 0; i < foundMixins.length; ++i) {\n foundMixins[i].path.push(rule);\n }\n Array.prototype.push.apply(rules, foundMixins);\n }\n } else {\n rules.push({ rule, path: []});\n }\n break;\n }\n }\n }\n });\n this._lookups[key] = rules;\n return rules;\n }\n\n genCSS(context, output) {\n let i;\n let j;\n const charsetRuleNodes = [];\n let ruleNodes = [];\n\n let // Line number debugging\n debugInfo;\n\n let rule;\n let path;\n\n context.tabLevel = (context.tabLevel || 0);\n\n if (!this.root) {\n context.tabLevel++;\n }\n\n const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' ');\n const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' ');\n let sep;\n\n let charsetNodeIndex = 0;\n let importNodeIndex = 0;\n for (i = 0; (rule = this.rules[i]); i++) {\n if (rule instanceof Comment) {\n if (importNodeIndex === i) {\n importNodeIndex++;\n }\n ruleNodes.push(rule);\n } else if (rule.isCharset && rule.isCharset()) {\n ruleNodes.splice(charsetNodeIndex, 0, rule);\n charsetNodeIndex++;\n importNodeIndex++;\n } else if (rule.type === 'Import') {\n ruleNodes.splice(importNodeIndex, 0, rule);\n importNodeIndex++;\n } else {\n ruleNodes.push(rule);\n }\n }\n ruleNodes = charsetRuleNodes.concat(ruleNodes);\n\n // If this is the root node, we don't render\n // a selector, or {}.\n if (!this.root) {\n debugInfo = getDebugInfo(context, this, tabSetStr);\n\n if (debugInfo) {\n output.add(debugInfo);\n output.add(tabSetStr);\n }\n\n const paths = this.paths;\n const pathCnt = paths.length;\n let pathSubCnt;\n\n sep = context.compress ? ',' : (`,\\n${tabSetStr}`);\n\n for (i = 0; i < pathCnt; i++) {\n path = paths[i];\n if (!(pathSubCnt = path.length)) { continue; }\n if (i > 0) { output.add(sep); }\n\n context.firstSelector = true;\n path[0].genCSS(context, output);\n\n context.firstSelector = false;\n for (j = 1; j < pathSubCnt; j++) {\n path[j].genCSS(context, output);\n }\n }\n\n output.add((context.compress ? '{' : ' {\\n') + tabRuleStr);\n }\n\n // Compile rules and rulesets\n for (i = 0; (rule = ruleNodes[i]); i++) {\n\n if (i + 1 === ruleNodes.length) {\n context.lastRule = true;\n }\n\n const currentLastRule = context.lastRule;\n if (rule.isRulesetLike(rule)) {\n context.lastRule = false;\n }\n\n if (rule.genCSS) {\n rule.genCSS(context, output);\n } else if (rule.value) {\n output.add(rule.value.toString());\n }\n\n context.lastRule = currentLastRule;\n\n if (!context.lastRule && rule.isVisible()) {\n output.add(context.compress ? '' : (`\\n${tabRuleStr}`));\n } else {\n context.lastRule = false;\n }\n }\n\n if (!this.root) {\n output.add((context.compress ? '}' : `\\n${tabSetStr}}`));\n context.tabLevel--;\n }\n\n if (!output.isEmpty() && !context.compress && this.firstRoot) {\n output.add('\\n');\n }\n }\n\n joinSelectors(paths, context, selectors) {\n for (let s = 0; s < selectors.length; s++) {\n this.joinSelector(paths, context, selectors[s]);\n }\n }\n\n joinSelector(paths, context, selector) {\n function createParenthesis(elementsToPak, originalElement) {\n let replacementParen;\n let j;\n if (elementsToPak.length === 0) {\n replacementParen = new Paren(elementsToPak[0]);\n } else {\n const insideParent = new Array(elementsToPak.length);\n for (j = 0; j < elementsToPak.length; j++) {\n insideParent[j] = new Element(\n null,\n elementsToPak[j],\n originalElement.isVariable,\n originalElement._index,\n originalElement._fileInfo\n );\n }\n replacementParen = new Paren(new Selector(insideParent));\n }\n return replacementParen;\n }\n\n function createSelector(containedElement, originalElement) {\n let element;\n let selector;\n element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo);\n selector = new Selector([element]);\n return selector;\n }\n\n // joins selector path from `beginningPath` with selector path in `addPath`\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns concatenated path\n function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) {\n let newSelectorPath;\n let lastSelector;\n let newJoinedSelector;\n // our new selector path\n newSelectorPath = [];\n\n // construct the joined selector - if & is the first thing this will be empty,\n // if not newJoinedSelector will be the last set of elements in the selector\n if (beginningPath.length > 0) {\n newSelectorPath = utils.copyArray(beginningPath);\n lastSelector = newSelectorPath.pop();\n newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements));\n }\n else {\n newJoinedSelector = originalSelector.createDerived([]);\n }\n\n if (addPath.length > 0) {\n // /deep/ is a CSS4 selector - (removed, so should deprecate)\n // that is valid without anything in front of it\n // so if the & does not have a combinator that is \"\" or \" \" then\n // and there is a combinator on the parent, then grab that.\n // this also allows + a { & .b { .a & { ... though not sure why you would want to do that\n let combinator = replacedElement.combinator;\n\n const parentEl = addPath[0].elements[0];\n if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) {\n combinator = parentEl.combinator;\n }\n // join the elements so far with the first part of the parent\n newJoinedSelector.elements.push(new Element(\n combinator,\n parentEl.value,\n replacedElement.isVariable,\n replacedElement._index,\n replacedElement._fileInfo\n ));\n newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1));\n }\n\n // now add the joined selector - but only if it is not empty\n if (newJoinedSelector.elements.length !== 0) {\n newSelectorPath.push(newJoinedSelector);\n }\n\n // put together the parent selectors after the join (e.g. the rest of the parent)\n if (addPath.length > 1) {\n let restOfPath = addPath.slice(1);\n restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, []));\n newSelectorPath = newSelectorPath.concat(restOfPath);\n }\n return newSelectorPath;\n }\n\n // joins selector path from `beginningPath` with every selector path in `addPaths` array\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns array with all concatenated paths\n function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) {\n let j;\n for (j = 0; j < beginningPath.length; j++) {\n const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector);\n result.push(newSelectorPath);\n }\n return result;\n }\n\n function mergeElementsOnToSelectors(elements, selectors) {\n let i;\n let sel;\n\n if (elements.length === 0) {\n return ;\n }\n if (selectors.length === 0) {\n selectors.push([ new Selector(elements) ]);\n return;\n }\n\n for (i = 0; (sel = selectors[i]); i++) {\n // if the previous thing in sel is a parent this needs to join on to it\n if (sel.length > 0) {\n sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements));\n }\n else {\n sel.push(new Selector(elements));\n }\n }\n }\n\n // replace all parent selectors inside `inSelector` by content of `context` array\n // resulting selectors are returned inside `paths` array\n // returns true if `inSelector` contained at least one parent selector\n function replaceParentSelector(paths, context, inSelector) {\n // The paths are [[Selector]]\n // The first list is a list of comma separated selectors\n // The inner list is a list of inheritance separated selectors\n // e.g.\n // .a, .b {\n // .c {\n // }\n // }\n // == [[.a] [.c]] [[.b] [.c]]\n //\n let i;\n\n let j;\n let k;\n let currentElements;\n let newSelectors;\n let selectorsMultiplied;\n let sel;\n let el;\n let hadParentSelector = false;\n let length;\n let lastSelector;\n function findNestedSelector(element) {\n let maybeSelector;\n if (!(element.value instanceof Paren)) {\n return null;\n }\n\n maybeSelector = element.value.value;\n if (!(maybeSelector instanceof Selector)) {\n return null;\n }\n\n return maybeSelector;\n }\n\n // the elements from the current selector so far\n currentElements = [];\n // the current list of new selectors to add to the path.\n // We will build it up. We initiate it with one empty selector as we \"multiply\" the new selectors\n // by the parents\n newSelectors = [\n []\n ];\n\n for (i = 0; (el = inSelector.elements[i]); i++) {\n // non parent reference elements just get added\n if (el.value !== '&') {\n const nestedSelector = findNestedSelector(el);\n if (nestedSelector != null) {\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n const nestedPaths = [];\n let replaced;\n const replacedNewSelectors = [];\n replaced = replaceParentSelector(nestedPaths, context, nestedSelector);\n hadParentSelector = hadParentSelector || replaced;\n // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors\n for (k = 0; k < nestedPaths.length; k++) {\n const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el);\n addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors);\n }\n newSelectors = replacedNewSelectors;\n currentElements = [];\n } else {\n currentElements.push(el);\n }\n\n } else {\n hadParentSelector = true;\n // the new list of selectors to add\n selectorsMultiplied = [];\n\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n // loop through our current selectors\n for (j = 0; j < newSelectors.length; j++) {\n sel = newSelectors[j];\n // if we don't have any parent paths, the & might be in a mixin so that it can be used\n // whether there are parents or not\n if (context.length === 0) {\n // the combinator used on el should now be applied to the next element instead so that\n // it is not lost\n if (sel.length > 0) {\n sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo));\n }\n selectorsMultiplied.push(sel);\n }\n else {\n // and the parent selectors\n for (k = 0; k < context.length; k++) {\n // We need to put the current selectors\n // then join the last selector's elements on to the parents selectors\n const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector);\n // add that to our new set of selectors\n selectorsMultiplied.push(newSelectorPath);\n }\n }\n }\n\n // our new selectors has been multiplied, so reset the state\n newSelectors = selectorsMultiplied;\n currentElements = [];\n }\n }\n\n // if we have any elements left over (e.g. .a& .b == .b)\n // add them on to all the current selectors\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n for (i = 0; i < newSelectors.length; i++) {\n length = newSelectors[i].length;\n if (length > 0) {\n paths.push(newSelectors[i]);\n lastSelector = newSelectors[i][length - 1];\n newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList);\n }\n }\n\n return hadParentSelector;\n }\n\n function deriveSelector(visibilityInfo, deriveFrom) {\n const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition);\n newSelector.copyVisibilityInfo(visibilityInfo);\n return newSelector;\n }\n\n // joinSelector code follows\n let i;\n\n let newPaths;\n let hadParentSelector;\n\n newPaths = [];\n hadParentSelector = replaceParentSelector(newPaths, context, selector);\n\n if (!hadParentSelector) {\n if (context.length > 0) {\n newPaths = [];\n for (i = 0; i < context.length; i++) {\n\n const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo()));\n\n concatenated.push(selector);\n newPaths.push(concatenated);\n }\n }\n else {\n newPaths = [[selector]];\n }\n }\n\n for (i = 0; i < newPaths.length; i++) {\n paths.push(newPaths[i]);\n }\n }\n}\n\nRuleset.prototype.type = 'Ruleset';\nRuleset.prototype.isRuleset = true;\nexport default Ruleset;\n","import Node from './node';\nimport Selector from './selector';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\n\nclass AtRule extends Node {\n constructor(\n name,\n value,\n rules,\n index,\n currentFileInfo,\n debugInfo,\n isRooted,\n visibilityInfo\n ) {\n super();\n\n let i;\n\n this.name = name;\n this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value);\n if (rules) {\n if (Array.isArray(rules)) {\n this.rules = rules;\n } else {\n this.rules = [rules];\n this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors();\n }\n for (i = 0; i < this.rules.length; i++) {\n this.rules[i].allowImports = true;\n }\n this.setParent(this.rules, this);\n }\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.debugInfo = debugInfo;\n this.isRooted = isRooted || false;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n const value = this.value;\n const rules = this.rules;\n if (rules) {\n this.rules = visitor.visitArray(rules);\n }\n if (value) {\n this.value = visitor.visit(value);\n }\n }\n\n isRulesetLike() {\n return this.rules || !this.isCharset();\n }\n\n isCharset() {\n return '@charset' === this.name;\n }\n\n genCSS(context, output) {\n const value = this.value;\n const rules = this.rules;\n output.add(this.name, this.fileInfo(), this.getIndex());\n if (value) {\n output.add(' ');\n value.genCSS(context, output);\n }\n if (rules) {\n this.outputRuleset(context, output, rules);\n } else {\n output.add(';');\n }\n }\n\n eval(context) {\n let mediaPathBackup;\n let mediaBlocksBackup;\n let value = this.value;\n let rules = this.rules;\n\n // media stored inside other atrule should not bubble over it\n // backpup media bubbling information\n mediaPathBackup = context.mediaPath;\n mediaBlocksBackup = context.mediaBlocks;\n // deleted media bubbling information\n context.mediaPath = [];\n context.mediaBlocks = [];\n\n if (value) {\n value = value.eval(context);\n }\n if (rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n rules = [rules[0].eval(context)];\n rules[0].root = true;\n }\n // restore media bubbling information\n context.mediaPath = mediaPathBackup;\n context.mediaBlocks = mediaBlocksBackup;\n\n return new AtRule(this.name, value, rules,\n this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo());\n }\n\n variable(name) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.variable.call(this.rules[0], name);\n }\n }\n\n find(...args) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.find.apply(this.rules[0], args);\n }\n }\n\n rulesets() {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.rulesets.apply(this.rules[0]);\n }\n }\n\n outputRuleset(context, output, rules) {\n const ruleCnt = rules.length;\n let i;\n context.tabLevel = (context.tabLevel | 0) + 1;\n\n // Compressed\n if (context.compress) {\n output.add('{');\n for (i = 0; i < ruleCnt; i++) {\n rules[i].genCSS(context, output);\n }\n output.add('}');\n context.tabLevel--;\n return;\n }\n\n // Non-compressed\n const tabSetStr = `\\n${Array(context.tabLevel).join(' ')}`;\n\n const tabRuleStr = `${tabSetStr} `;\n if (!ruleCnt) {\n output.add(` {${tabSetStr}}`);\n } else {\n output.add(` {${tabRuleStr}`);\n rules[0].genCSS(context, output);\n for (i = 1; i < ruleCnt; i++) {\n output.add(tabRuleStr);\n rules[i].genCSS(context, output);\n }\n output.add(`${tabSetStr}}`);\n }\n\n context.tabLevel--;\n }\n}\n\nAtRule.prototype.type = 'AtRule';\nexport default AtRule;\n","import Node from './node';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass DetachedRuleset extends Node {\n constructor(ruleset, frames) {\n super();\n\n this.ruleset = ruleset;\n this.frames = frames;\n this.setParent(this.ruleset, this);\n }\n\n accept(visitor) {\n this.ruleset = visitor.visit(this.ruleset);\n }\n\n eval(context) {\n const frames = this.frames || utils.copyArray(context.frames);\n return new DetachedRuleset(this.ruleset, frames);\n }\n\n callEval(context) {\n return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context);\n }\n}\n\nDetachedRuleset.prototype.type = 'DetachedRuleset';\nDetachedRuleset.prototype.evalFirst = true;\nexport default DetachedRuleset;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport * as utils from '../utils';\n\nclass Unit extends Node {\n constructor(numerator, denominator, backupUnit) {\n super();\n\n this.numerator = numerator ? utils.copyArray(numerator).sort() : [];\n this.denominator = denominator ? utils.copyArray(denominator).sort() : [];\n if (backupUnit) {\n this.backupUnit = backupUnit;\n } else if (numerator && numerator.length) {\n this.backupUnit = numerator[0];\n }\n }\n\n clone() {\n return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit);\n }\n\n genCSS(context, output) {\n // Dimension checks the unit is singular and throws an error if in strict math mode.\n const strictUnits = context && context.strictUnits;\n if (this.numerator.length === 1) {\n output.add(this.numerator[0]); // the ideal situation\n } else if (!strictUnits && this.backupUnit) {\n output.add(this.backupUnit);\n } else if (!strictUnits && this.denominator.length) {\n output.add(this.denominator[0]);\n }\n }\n\n toString() {\n let i;\n let returnStr = this.numerator.join('*');\n for (i = 0; i < this.denominator.length; i++) {\n returnStr += `/${this.denominator[i]}`;\n }\n return returnStr;\n }\n\n compare(other) {\n return this.is(other.toString()) ? 0 : undefined;\n }\n\n is(unitString) {\n return this.toString().toUpperCase() === unitString.toUpperCase();\n }\n\n isLength() {\n return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS());\n }\n\n isEmpty() {\n return this.numerator.length === 0 && this.denominator.length === 0;\n }\n\n isSingular() {\n return this.numerator.length <= 1 && this.denominator.length === 0;\n }\n\n map(callback) {\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n this.numerator[i] = callback(this.numerator[i], false);\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n this.denominator[i] = callback(this.denominator[i], true);\n }\n }\n\n usedUnits() {\n let group;\n const result = {};\n let mapUnit;\n let groupName;\n\n mapUnit = atomicUnit => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit) && !result[groupName]) {\n result[groupName] = atomicUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in unitConversions) {\n if (unitConversions.hasOwnProperty(groupName)) {\n group = unitConversions[groupName];\n\n this.map(mapUnit);\n }\n }\n\n return result;\n }\n\n cancel() {\n const counter = {};\n let atomicUnit;\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n atomicUnit = this.numerator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) + 1;\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n atomicUnit = this.denominator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) - 1;\n }\n\n this.numerator = [];\n this.denominator = [];\n\n for (atomicUnit in counter) {\n if (counter.hasOwnProperty(atomicUnit)) {\n const count = counter[atomicUnit];\n\n if (count > 0) {\n for (i = 0; i < count; i++) {\n this.numerator.push(atomicUnit);\n }\n } else if (count < 0) {\n for (i = 0; i < -count; i++) {\n this.denominator.push(atomicUnit);\n }\n }\n }\n }\n\n this.numerator.sort();\n this.denominator.sort();\n }\n}\n\nUnit.prototype.type = 'Unit';\nexport default Unit;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport Unit from './unit';\nimport Color from './color';\n\n//\n// A number with a unit\n//\nclass Dimension extends Node {\n constructor(value, unit) {\n super();\n\n this.value = parseFloat(value);\n if (isNaN(this.value)) {\n throw new Error('Dimension is not a number.');\n }\n this.unit = (unit && unit instanceof Unit) ? unit :\n new Unit(unit ? [unit] : undefined);\n this.setParent(this.unit, this);\n }\n\n accept(visitor) {\n this.unit = visitor.visit(this.unit);\n }\n\n eval(context) {\n return this;\n }\n\n toColor() {\n return new Color([this.value, this.value, this.value]);\n }\n\n genCSS(context, output) {\n if ((context && context.strictUnits) && !this.unit.isSingular()) {\n throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`);\n }\n\n const value = this.fround(context, this.value);\n let strValue = String(value);\n\n if (value !== 0 && value < 0.000001 && value > -0.000001) {\n // would be output 1e-6 etc.\n strValue = value.toFixed(20).replace(/0+$/, '');\n }\n\n if (context && context.compress) {\n // Zero values doesn't need a unit\n if (value === 0 && this.unit.isLength()) {\n output.add(strValue);\n return;\n }\n\n // Float values doesn't need a leading zero\n if (value > 0 && value < 1) {\n strValue = (strValue).substr(1);\n }\n }\n\n output.add(strValue);\n this.unit.genCSS(context, output);\n }\n\n // In an operation between two Dimensions,\n // we default to the first Dimension's unit,\n // so `1px + 2` will yield `3px`.\n operate(context, op, other) {\n /* jshint noempty:false */\n let value = this._operate(context, op, this.value, other.value);\n\n let unit = this.unit.clone();\n\n if (op === '+' || op === '-') {\n if (unit.numerator.length === 0 && unit.denominator.length === 0) {\n unit = other.unit.clone();\n if (this.unit.backupUnit) {\n unit.backupUnit = this.unit.backupUnit;\n }\n } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) {\n // do nothing\n } else {\n other = other.convertTo(this.unit.usedUnits());\n\n if (context.strictUnits && other.unit.toString() !== unit.toString()) {\n throw new Error(`Incompatible units. Change the units or use the unit function. ` + \n `Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`);\n }\n\n value = this._operate(context, op, this.value, other.value);\n }\n } else if (op === '*') {\n unit.numerator = unit.numerator.concat(other.unit.numerator).sort();\n unit.denominator = unit.denominator.concat(other.unit.denominator).sort();\n unit.cancel();\n } else if (op === '/') {\n unit.numerator = unit.numerator.concat(other.unit.denominator).sort();\n unit.denominator = unit.denominator.concat(other.unit.numerator).sort();\n unit.cancel();\n }\n return new Dimension(value, unit);\n }\n\n compare(other) {\n let a;\n let b;\n\n if (!(other instanceof Dimension)) {\n return undefined;\n }\n\n if (this.unit.isEmpty() || other.unit.isEmpty()) {\n a = this;\n b = other;\n } else {\n a = this.unify();\n b = other.unify();\n if (a.unit.compare(b.unit) !== 0) {\n return undefined;\n }\n }\n\n return Node.numericCompare(a.value, b.value);\n }\n\n unify() {\n return this.convertTo({ length: 'px', duration: 's', angle: 'rad' });\n }\n\n convertTo(conversions) {\n let value = this.value;\n const unit = this.unit.clone();\n let i;\n let groupName;\n let group;\n let targetUnit;\n let derivedConversions = {};\n let applyUnit;\n\n if (typeof conversions === 'string') {\n for (i in unitConversions) {\n if (unitConversions[i].hasOwnProperty(conversions)) {\n derivedConversions = {};\n derivedConversions[i] = conversions;\n }\n }\n conversions = derivedConversions;\n }\n applyUnit = (atomicUnit, denominator) => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit)) {\n if (denominator) {\n value = value / (group[atomicUnit] / group[targetUnit]);\n } else {\n value = value * (group[atomicUnit] / group[targetUnit]);\n }\n\n return targetUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in conversions) {\n if (conversions.hasOwnProperty(groupName)) {\n targetUnit = conversions[groupName];\n group = unitConversions[groupName];\n\n unit.map(applyUnit);\n }\n }\n\n unit.cancel();\n\n return new Dimension(value, unit);\n }\n}\n\nDimension.prototype.type = 'Dimension';\nexport default Dimension;\n","import Node from './node';\nimport Color from './color';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Operation extends Node {\n constructor(op, operands, isSpaced) {\n super();\n\n this.op = op.trim();\n this.operands = operands;\n this.isSpaced = isSpaced;\n }\n\n accept(visitor) {\n this.operands = visitor.visitArray(this.operands);\n }\n\n eval(context) {\n let a = this.operands[0].eval(context);\n let b = this.operands[1].eval(context);\n let op;\n\n if (context.isMathOn(this.op)) {\n op = this.op === './' ? '/' : this.op;\n if (a instanceof Dimension && b instanceof Color) {\n a = a.toColor();\n }\n if (b instanceof Dimension && a instanceof Color) {\n b = b.toColor();\n }\n if (!a.operate) {\n if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n throw { type: 'Operation',\n message: 'Operation on an invalid type' };\n }\n\n return a.operate(context, op, b);\n } else {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n }\n\n genCSS(context, output) {\n this.operands[0].genCSS(context, output);\n if (this.isSpaced) {\n output.add(' ');\n }\n output.add(this.op);\n if (this.isSpaced) {\n output.add(' ');\n }\n this.operands[1].genCSS(context, output);\n }\n}\n\nOperation.prototype.type = 'Operation';\nexport default Operation;\n","import Node from './node';\nimport Paren from './paren';\nimport Comment from './comment';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\nclass Expression extends Node {\n constructor(value, noSpacing) {\n super();\n\n this.value = value;\n this.noSpacing = noSpacing;\n if (!value) {\n throw new Error('Expression requires an array parameter');\n }\n }\n\n accept(visitor) {\n this.value = visitor.visitArray(this.value);\n }\n\n eval(context) {\n let returnValue;\n const mathOn = context.isMathOn();\n\n const inParenthesis = this.parens && \n (context.math !== MATH.STRICT_LEGACY || !this.parensInOp);\n\n let doubleParen = false;\n if (inParenthesis) {\n context.inParenthesis();\n }\n if (this.value.length > 1) {\n returnValue = new Expression(this.value.map(e => {\n if (!e.eval) {\n return e;\n }\n return e.eval(context);\n }), this.noSpacing);\n } else if (this.value.length === 1) {\n if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) {\n doubleParen = true;\n }\n returnValue = this.value[0].eval(context);\n } else {\n returnValue = this;\n }\n if (inParenthesis) {\n context.outOfParenthesis();\n }\n if (this.parens && this.parensInOp && !mathOn && !doubleParen \n && (!(returnValue instanceof Dimension))) {\n returnValue = new Paren(returnValue);\n }\n return returnValue;\n }\n\n genCSS(context, output) {\n for (let i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (!this.noSpacing && i + 1 < this.value.length) {\n output.add(' ');\n }\n }\n }\n\n throwAwayComments() {\n this.value = this.value.filter(v => !(v instanceof Comment));\n }\n}\n\nExpression.prototype.type = 'Expression';\nexport default Expression;\n","import Expression from '../tree/expression';\n\nclass functionCaller {\n constructor(name, context, index, currentFileInfo) {\n this.name = name.toLowerCase();\n this.index = index;\n this.context = context;\n this.currentFileInfo = currentFileInfo;\n\n this.func = context.frames[0].functionRegistry.get(this.name);\n }\n\n isValid() {\n return Boolean(this.func);\n }\n\n call(args) {\n // This code is terrible and should be replaced as per this issue...\n // https://github.com/less/less.js/issues/2477\n if (Array.isArray(args)) {\n args = args.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n })\n .map(item => {\n if (item.type === 'Expression') {\n const subNodes = item.value.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n });\n if (subNodes.length === 1) {\n return subNodes[0];\n } else {\n return new Expression(subNodes);\n }\n }\n return item;\n });\n }\n\n return this.func(...args);\n }\n}\n\nexport default functionCaller;\n","import Node from './node';\nimport Anonymous from './anonymous';\nimport FunctionCaller from '../functions/function-caller';\n\n//\n// A function call node.\n//\nclass Call extends Node {\n constructor(name, args, index, currentFileInfo) {\n super();\n\n this.name = name;\n this.args = args;\n this.calc = name === 'calc';\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n accept(visitor) {\n if (this.args) {\n this.args = visitor.visitArray(this.args);\n }\n }\n\n //\n // When evaluating a function call,\n // we either find the function in the functionRegistry,\n // in which case we call it, passing the evaluated arguments,\n // if this returns null or we cannot find the function, we\n // simply print it out as it appeared originally [2].\n //\n // The reason why we evaluate the arguments, is in the case where\n // we try to pass a variable to a function, like: `saturate(@color)`.\n // The function should receive the value, not the variable.\n //\n eval(context) {\n /**\n * Turn off math for calc(), and switch back on for evaluating nested functions\n */\n const currentMathContext = context.mathOn;\n context.mathOn = !this.calc;\n if (this.calc || context.inCalc) {\n context.enterCalc();\n }\n const args = this.args.map(a => a.eval(context));\n if (this.calc || context.inCalc) {\n context.exitCalc();\n }\n context.mathOn = currentMathContext;\n\n let result;\n const funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo());\n\n if (funcCaller.isValid()) {\n try {\n result = funcCaller.call(args);\n } catch (e) {\n throw { \n type: e.type || 'Runtime',\n message: `error evaluating function \\`${this.name}\\`${e.message ? `: ${e.message}` : ''}`,\n index: this.getIndex(), \n filename: this.fileInfo().filename,\n line: e.lineNumber,\n column: e.columnNumber\n };\n }\n\n if (result !== null && result !== undefined) {\n // Results that that are not nodes are cast as Anonymous nodes\n // Falsy values or booleans are returned as empty nodes\n if (!(result instanceof Node)) {\n if (!result || result === true) {\n result = new Anonymous(null); \n }\n else {\n result = new Anonymous(result.toString()); \n }\n \n }\n result._index = this._index;\n result._fileInfo = this._fileInfo;\n return result;\n }\n\n }\n\n return new Call(this.name, args, this.getIndex(), this.fileInfo());\n }\n\n genCSS(context, output) {\n output.add(`${this.name}(`, this.fileInfo(), this.getIndex());\n\n for (let i = 0; i < this.args.length; i++) {\n this.args[i].genCSS(context, output);\n if (i + 1 < this.args.length) {\n output.add(', ');\n }\n }\n\n output.add(')');\n }\n}\n\nCall.prototype.type = 'Call';\nexport default Call;\n","import Node from './node';\nimport Call from './call';\n\nclass Variable extends Node {\n constructor(name, index, currentFileInfo) {\n super();\n\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let variable;\n let name = this.name;\n\n if (name.indexOf('@@') === 0) {\n name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`;\n }\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive variable definition for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n variable = this.find(context.frames, frame => {\n const v = frame.variable(name);\n if (v) {\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n // If in calc, wrap vars in a function call to cascade evaluate args first\n if (context.inCalc) {\n return (new Call('_SELF', [v.value])).eval(context);\n }\n else {\n return v.value.eval(context);\n }\n }\n });\n if (variable) {\n this.evaluating = false;\n return variable;\n } else {\n throw { type: 'Name',\n message: `variable ${name} is undefined`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nVariable.prototype.type = 'Variable';\nexport default Variable;\n","import Node from './node';\nimport Declaration from './declaration';\n\nclass Property extends Node {\n constructor(name, index, currentFileInfo) {\n super();\n\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let property;\n const name = this.name;\n // TODO: shorten this reference\n const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules;\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive property reference for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n property = this.find(context.frames, frame => {\n let v;\n const vArr = frame.property(name);\n if (vArr) {\n for (let i = 0; i < vArr.length; i++) {\n v = vArr[i];\n\n vArr[i] = new Declaration(v.name,\n v.value,\n v.important,\n v.merge,\n v.index,\n v.currentFileInfo,\n v.inline,\n v.variable\n );\n }\n mergeRules(vArr);\n\n v = vArr[vArr.length - 1];\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n v = v.value.eval(context);\n return v;\n }\n });\n if (property) {\n this.evaluating = false;\n return property;\n } else {\n throw { type: 'Name',\n message: `Property '${name}' is undefined`,\n filename: this.currentFileInfo.filename,\n index: this.index };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nProperty.prototype.type = 'Property';\nexport default Property;\n","import Node from './node';\n\nclass Attribute extends Node {\n constructor(key, op, value) {\n super();\n\n this.key = key;\n this.op = op;\n this.value = value;\n }\n\n eval(context) {\n return new Attribute(this.key.eval ? this.key.eval(context) : this.key,\n this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value);\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context) {\n let value = this.key.toCSS ? this.key.toCSS(context) : this.key;\n\n if (this.op) {\n value += this.op;\n value += (this.value.toCSS ? this.value.toCSS(context) : this.value);\n }\n\n return `[${value}]`;\n }\n}\n\nAttribute.prototype.type = 'Attribute';\nexport default Attribute;\n","import Node from './node';\nimport Variable from './variable';\nimport Property from './property';\n\nclass Quoted extends Node {\n constructor(str, content, escaped, index, currentFileInfo) {\n super();\n\n this.escaped = (escaped == null) ? true : escaped;\n this.value = content || '';\n this.quote = str.charAt(0);\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.variableRegex = /@\\{([\\w-]+)\\}/g;\n this.propRegex = /\\$\\{([\\w-]+)\\}/g;\n }\n\n genCSS(context, output) {\n if (!this.escaped) {\n output.add(this.quote, this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n if (!this.escaped) {\n output.add(this.quote);\n }\n }\n\n containsVariables() {\n return this.value.match(this.variableRegex);\n }\n\n eval(context) {\n const that = this;\n let value = this.value;\n const variableReplacement = (_, name) => {\n const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n const propertyReplacement = (_, name) => {\n const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n function iterativeReplace(value, regexp, replacementFnc) {\n let evaluatedValue = value;\n do {\n value = evaluatedValue.toString();\n evaluatedValue = value.replace(regexp, replacementFnc);\n } while (value !== evaluatedValue);\n return evaluatedValue;\n }\n value = iterativeReplace(value, this.variableRegex, variableReplacement);\n value = iterativeReplace(value, this.propRegex, propertyReplacement);\n return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo());\n }\n\n compare(other) {\n // when comparing quoted strings allow the quote to differ\n if (other.type === 'Quoted' && !this.escaped && !other.escaped) {\n return Node.numericCompare(this.value, other.value);\n } else {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n }\n}\n\nQuoted.prototype.type = 'Quoted';\nexport default Quoted;\n","import Node from './node';\n\nclass URL extends Node {\n constructor(val, index, currentFileInfo, isEvald) {\n super();\n\n this.value = val;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.isEvald = isEvald;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n genCSS(context, output) {\n output.add('url(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n const val = this.value.eval(context);\n let rootpath;\n\n if (!this.isEvald) {\n // Add the rootpath if the URL requires a rewrite\n rootpath = this.fileInfo() && this.fileInfo().rootpath;\n if (typeof rootpath === 'string' &&\n typeof val.value === 'string' &&\n context.pathRequiresRewrite(val.value)) {\n if (!val.quote) {\n rootpath = escapePath(rootpath);\n }\n val.value = context.rewritePath(val.value, rootpath);\n } else {\n val.value = context.normalizePath(val.value);\n }\n\n // Add url args if enabled\n if (context.urlArgs) {\n if (!val.value.match(/^\\s*data:/)) {\n const delimiter = val.value.indexOf('?') === -1 ? '?' : '&';\n const urlArgs = delimiter + context.urlArgs;\n if (val.value.indexOf('#') !== -1) {\n val.value = val.value.replace('#', `${urlArgs}#`);\n } else {\n val.value += urlArgs;\n }\n }\n }\n }\n\n return new URL(val, this.getIndex(), this.fileInfo(), true);\n }\n}\n\nURL.prototype.type = 'Url';\n\nfunction escapePath(path) {\n return path.replace(/[\\(\\)'\"\\s]/g, match => `\\\\${match}`);\n}\n\nexport default URL;\n","import Ruleset from './ruleset';\nimport Value from './value';\nimport Selector from './selector';\nimport Anonymous from './anonymous';\nimport Expression from './expression';\nimport AtRule from './atrule';\nimport * as utils from '../utils';\n\nclass Media extends AtRule {\n constructor(value, features, index, currentFileInfo, visibilityInfo) {\n super();\n\n this._index = index;\n this._fileInfo = currentFileInfo;\n\n const selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors();\n\n this.features = new Value(features);\n this.rules = [new Ruleset(selectors, value)];\n this.rules[0].allowImports = true;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n this.setParent(selectors, this);\n this.setParent(this.features, this);\n this.setParent(this.rules, this);\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n if (this.rules) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n genCSS(context, output) {\n output.add('@media ', this._fileInfo, this._index);\n this.features.genCSS(context, output);\n this.outputRuleset(context, output, this.rules);\n }\n\n eval(context) {\n if (!context.mediaBlocks) {\n context.mediaBlocks = [];\n context.mediaPath = [];\n }\n\n const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo());\n if (this.debugInfo) {\n this.rules[0].debugInfo = this.debugInfo;\n media.debugInfo = this.debugInfo;\n }\n \n media.features = this.features.eval(context);\n\n context.mediaPath.push(media);\n context.mediaBlocks.push(media);\n\n this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit();\n context.frames.unshift(this.rules[0]);\n media.rules = [this.rules[0].eval(context)];\n context.frames.shift();\n\n context.mediaPath.pop();\n\n return context.mediaPath.length === 0 ? media.evalTop(context) :\n media.evalNested(context);\n }\n\n evalTop(context) {\n let result = this;\n\n // Render all dependent Media blocks.\n if (context.mediaBlocks.length > 1) {\n const selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors();\n result = new Ruleset(selectors, context.mediaBlocks);\n result.multiMedia = true;\n result.copyVisibilityInfo(this.visibilityInfo());\n this.setParent(result, this);\n }\n\n delete context.mediaBlocks;\n delete context.mediaPath;\n\n return result;\n }\n\n evalNested(context) {\n let i;\n let value;\n const path = context.mediaPath.concat([this]);\n\n // Extract the media-query conditions separated with `,` (OR).\n for (i = 0; i < path.length; i++) {\n value = path[i].features instanceof Value ?\n path[i].features.value : path[i].features;\n path[i] = Array.isArray(value) ? value : [value];\n }\n\n // Trace all permutations to generate the resulting media-query.\n //\n // (a, b and c) with nested (d, e) ->\n // a and d\n // a and e\n // b and c and d\n // b and c and e\n this.features = new Value(this.permute(path).map(path => {\n path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment));\n\n for (i = path.length - 1; i > 0; i--) {\n path.splice(i, 0, new Anonymous('and'));\n }\n\n return new Expression(path);\n }));\n this.setParent(this.features, this);\n\n // Fake a tree-node that doesn't output anything.\n return new Ruleset([], []);\n }\n\n permute(arr) {\n if (arr.length === 0) {\n return [];\n } else if (arr.length === 1) {\n return arr[0];\n } else {\n const result = [];\n const rest = this.permute(arr.slice(1));\n for (let i = 0; i < rest.length; i++) {\n for (let j = 0; j < arr[0].length; j++) {\n result.push([arr[0][j]].concat(rest[i]));\n }\n }\n return result;\n }\n }\n\n bubbleSelectors(selectors) {\n if (!selectors) {\n return;\n }\n this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])];\n this.setParent(this.rules, this);\n }\n}\n\nMedia.prototype.type = 'Media';\nexport default Media;\n","import Node from './node';\nimport Media from './media';\nimport URL from './url';\nimport Quoted from './quoted';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\nimport * as utils from '../utils';\nimport LessError from '../less-error';\n\n//\n// CSS @import node\n//\n// The general strategy here is that we don't want to wait\n// for the parsing to be completed, before we start importing\n// the file. That's because in the context of a browser,\n// most of the time will be spent waiting for the server to respond.\n//\n// On creation, we push the import path to our import queue, though\n// `import,push`, we also pass it a callback, which it'll call once\n// the file has been fetched, and parsed.\n//\nclass Import extends Node {\n constructor(path, features, options, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.options = options;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.path = path;\n this.features = features;\n this.allowRoot = true;\n\n if (this.options.less !== undefined || this.options.inline) {\n this.css = !this.options.less || this.options.inline;\n } else {\n const pathValue = this.getPath();\n if (pathValue && /[#\\.\\&\\?]css([\\?;].*)?$/.test(pathValue)) {\n this.css = true;\n }\n }\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.features, this);\n this.setParent(this.path, this);\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n this.path = visitor.visit(this.path);\n if (!this.options.isPlugin && !this.options.inline && this.root) {\n this.root = visitor.visit(this.root);\n }\n }\n\n genCSS(context, output) {\n if (this.css && this.path._fileInfo.reference === undefined) {\n output.add('@import ', this._fileInfo, this._index);\n this.path.genCSS(context, output);\n if (this.features) {\n output.add(' ');\n this.features.genCSS(context, output);\n }\n output.add(';');\n }\n }\n\n getPath() {\n return (this.path instanceof URL) ?\n this.path.value.value : this.path.value;\n }\n\n isVariableImport() {\n let path = this.path;\n if (path instanceof URL) {\n path = path.value;\n }\n if (path instanceof Quoted) {\n return path.containsVariables();\n }\n\n return true;\n }\n\n evalForImport(context) {\n let path = this.path;\n\n if (path instanceof URL) {\n path = path.value;\n }\n\n return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo());\n }\n\n evalPath(context) {\n const path = this.path.eval(context);\n const fileInfo = this._fileInfo;\n\n if (!(path instanceof URL)) {\n // Add the rootpath if the URL requires a rewrite\n const pathValue = path.value;\n if (fileInfo &&\n pathValue &&\n context.pathRequiresRewrite(pathValue)) {\n path.value = context.rewritePath(pathValue, fileInfo.rootpath);\n } else {\n path.value = context.normalizePath(path.value);\n }\n }\n\n return path;\n }\n\n eval(context) {\n const result = this.doEval(context);\n if (this.options.reference || this.blocksVisibility()) {\n if (result.length || result.length === 0) {\n result.forEach(node => {\n node.addVisibilityBlock();\n }\n );\n } else {\n result.addVisibilityBlock();\n }\n }\n return result;\n }\n\n doEval(context) {\n let ruleset;\n let registry;\n const features = this.features && this.features.eval(context);\n\n if (this.options.isPlugin) {\n if (this.root && this.root.eval) {\n try {\n this.root.eval(context);\n }\n catch (e) {\n e.message = 'Plugin error during evaluation';\n throw new LessError(e, this.root.imports, this.root.filename);\n }\n }\n registry = context.frames[0] && context.frames[0].functionRegistry;\n if ( registry && this.root && this.root.functions ) {\n registry.addMultiple( this.root.functions );\n }\n\n return [];\n }\n\n if (this.skip) {\n if (typeof this.skip === 'function') {\n this.skip = this.skip();\n }\n if (this.skip) {\n return [];\n }\n }\n if (this.options.inline) {\n const contents = new Anonymous(this.root, 0,\n {\n filename: this.importedFilename,\n reference: this.path._fileInfo && this.path._fileInfo.reference\n }, true, true);\n\n return this.features ? new Media([contents], this.features.value) : [contents];\n } else if (this.css) {\n const newImport = new Import(this.evalPath(context), features, this.options, this._index);\n if (!newImport.css && this.error) {\n throw this.error;\n }\n return newImport;\n } else {\n ruleset = new Ruleset(null, utils.copyArray(this.root.rules));\n ruleset.evalImports(context);\n\n return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules;\n }\n }\n}\n\nImport.prototype.type = 'Import';\nexport default Import;\n","import Node from './node';\nimport Variable from './variable';\n\nclass JsEvalNode extends Node {\n evaluateJavaScript(expression, context) {\n let result;\n const that = this;\n const evalContext = {};\n\n if (!context.javascriptEnabled) {\n throw { message: 'Inline JavaScript is not enabled. Is it set in your options?',\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n expression = expression.replace(/@\\{([\\w-]+)\\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context)));\n\n try {\n expression = new Function(`return (${expression})`);\n } catch (e) {\n throw { message: `JavaScript evaluation error: ${e.message} from \\`${expression}\\`` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n const variables = context.frames[0].variables();\n for (const k in variables) {\n if (variables.hasOwnProperty(k)) {\n /* jshint loopfunc:true */\n evalContext[k.slice(1)] = {\n value: variables[k].value,\n toJS: function () {\n return this.value.eval(context).toCSS();\n }\n };\n }\n }\n\n try {\n result = expression.call(evalContext);\n } catch (e) {\n throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/[\"]/g, '\\'')}'` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n return result;\n }\n\n jsify(obj) {\n if (Array.isArray(obj.value) && (obj.value.length > 1)) {\n return `[${obj.value.map(v => v.toCSS()).join(', ')}]`;\n } else {\n return obj.toCSS();\n }\n }\n}\n\nexport default JsEvalNode;\n","import JsEvalNode from './js-eval-node';\nimport Dimension from './dimension';\nimport Quoted from './quoted';\nimport Anonymous from './anonymous';\n\nclass JavaScript extends JsEvalNode {\n constructor(string, escaped, index, currentFileInfo) {\n super();\n\n this.escaped = escaped;\n this.expression = string;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n const result = this.evaluateJavaScript(this.expression, context);\n const type = typeof result;\n\n if (type === 'number' && !isNaN(result)) {\n return new Dimension(result);\n } else if (type === 'string') {\n return new Quoted(`\"${result}\"`, result, this.escaped, this._index);\n } else if (Array.isArray(result)) {\n return new Anonymous(result.join(', '));\n } else {\n return new Anonymous(result);\n }\n }\n}\n\nJavaScript.prototype.type = 'JavaScript';\nexport default JavaScript;\n","import Node from './node';\n\nclass Assignment extends Node {\n constructor(key, val) {\n super();\n\n this.key = key;\n this.value = val;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval(context) {\n if (this.value.eval) {\n return new Assignment(this.key, this.value.eval(context));\n }\n return this;\n }\n\n genCSS(context, output) {\n output.add(`${this.key}=`);\n if (this.value.genCSS) {\n this.value.genCSS(context, output);\n } else {\n output.add(this.value);\n }\n }\n}\n\nAssignment.prototype.type = 'Assignment';\nexport default Assignment;\n","import Node from './node';\n\nclass Condition extends Node {\n constructor(op, l, r, i, negate) {\n super();\n\n this.op = op.trim();\n this.lvalue = l;\n this.rvalue = r;\n this._index = i;\n this.negate = negate;\n }\n\n accept(visitor) {\n this.lvalue = visitor.visit(this.lvalue);\n this.rvalue = visitor.visit(this.rvalue);\n }\n\n eval(context) {\n const result = ((op, a, b) => {\n switch (op) {\n case 'and': return a && b;\n case 'or': return a || b;\n default:\n switch (Node.compare(a, b)) {\n case -1:\n return op === '<' || op === '=<' || op === '<=';\n case 0:\n return op === '=' || op === '>=' || op === '=<' || op === '<=';\n case 1:\n return op === '>' || op === '>=';\n default:\n return false;\n }\n }\n })(this.op, this.lvalue.eval(context), this.rvalue.eval(context));\n\n return this.negate ? !result : result;\n }\n}\n\nCondition.prototype.type = 'Condition';\nexport default Condition;\n","import Node from './node';\n\nclass UnicodeDescriptor extends Node {\n constructor(value) {\n super();\n\n this.value = value;\n }\n}\n\nUnicodeDescriptor.prototype.type = 'UnicodeDescriptor';\n\nexport default UnicodeDescriptor;\n","import Node from './node';\nimport Operation from './operation';\nimport Dimension from './dimension';\n\nclass Negative extends Node {\n constructor(node) {\n super();\n\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('-');\n this.value.genCSS(context, output);\n }\n\n eval(context) {\n if (context.isMathOn()) {\n return (new Operation('*', [new Dimension(-1), this.value])).eval(context);\n }\n return new Negative(this.value.eval(context));\n }\n}\n\nNegative.prototype.type = 'Negative';\nexport default Negative;\n","import Node from './node';\nimport Selector from './selector';\n\nclass Extend extends Node {\n constructor(selector, option, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.selector = selector;\n this.option = option;\n this.object_id = Extend.next_id++;\n this.parent_ids = [this.object_id];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n switch (option) {\n case 'all':\n this.allowBefore = true;\n this.allowAfter = true;\n break;\n default:\n this.allowBefore = false;\n this.allowAfter = false;\n break;\n }\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n this.selector = visitor.visit(this.selector);\n }\n\n eval(context) {\n return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n clone(context) {\n return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n // it concatenates (joins) all selectors in selector array\n findSelfSelectors(selectors) {\n let selfElements = [];\n let i;\n let selectorElements;\n\n for (i = 0; i < selectors.length; i++) {\n selectorElements = selectors[i].elements;\n // duplicate the logic in genCSS function inside the selector node.\n // future TODO - move both logics into the selector joiner visitor\n if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') {\n selectorElements[0].combinator.value = ' ';\n }\n selfElements = selfElements.concat(selectors[i].elements);\n }\n\n this.selfSelectors = [new Selector(selfElements)];\n this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo());\n }\n}\n\nExtend.next_id = 0;\n\nExtend.prototype.type = 'Extend';\nexport default Extend;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport DetachedRuleset from './detached-ruleset';\nimport LessError from '../less-error';\n\nclass VariableCall extends Node {\n constructor(variable, index, currentFileInfo) {\n super();\n\n this.variable = variable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n eval(context) {\n let rules;\n let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context);\n const error = new LessError({message: `Could not evaluate variable call ${this.variable}`});\n\n if (!detachedRuleset.ruleset) {\n if (detachedRuleset.rules) {\n rules = detachedRuleset;\n }\n else if (Array.isArray(detachedRuleset)) {\n rules = new Ruleset('', detachedRuleset);\n }\n else if (Array.isArray(detachedRuleset.value)) {\n rules = new Ruleset('', detachedRuleset.value);\n }\n else {\n throw error;\n }\n detachedRuleset = new DetachedRuleset(rules);\n }\n\n if (detachedRuleset.ruleset) {\n return detachedRuleset.callEval(context);\n }\n throw error;\n }\n}\n\nVariableCall.prototype.type = 'VariableCall';\nexport default VariableCall;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport Selector from './selector';\n\nclass NamespaceValue extends Node {\n constructor(ruleCall, lookups, important, index, fileInfo) {\n super();\n\n this.value = ruleCall;\n this.lookups = lookups;\n this.important = important;\n this._index = index;\n this._fileInfo = fileInfo;\n }\n\n eval(context) {\n let i;\n let j;\n let name;\n let rules = this.value.eval(context);\n\n for (i = 0; i < this.lookups.length; i++) {\n name = this.lookups[i];\n\n /**\n * Eval'd DRs return rulesets.\n * Eval'd mixins return rules, so let's make a ruleset if we need it.\n * We need to do this because of late parsing of values\n */\n if (Array.isArray(rules)) {\n rules = new Ruleset([new Selector()], rules);\n }\n\n if (name === '') {\n rules = rules.lastDeclaration();\n }\n else if (name.charAt(0) === '@') {\n if (name.charAt(1) === '@') {\n name = `@${new Variable(name.substr(1)).eval(context).value}`;\n }\n if (rules.variables) {\n rules = rules.variable(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `variable ${name} not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n else {\n if (name.substring(0, 2) === '$@') {\n name = `$${new Variable(name.substr(1)).eval(context).value}`;\n }\n else {\n name = name.charAt(0) === '$' ? name : `$${name}`;\n }\n if (rules.properties) {\n rules = rules.property(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `property \"${name.substr(1)}\" not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n // Properties are an array of values, since a ruleset can have multiple props.\n // We pick the last one (the \"cascaded\" value)\n rules = rules[rules.length - 1];\n }\n\n if (rules.value) {\n rules = rules.eval(context).value;\n }\n if (rules.ruleset) {\n rules = rules.ruleset.eval(context);\n }\n }\n return rules;\n }\n}\n\nNamespaceValue.prototype.type = 'NamespaceValue';\nexport default NamespaceValue;\n","import Selector from './selector';\nimport Element from './element';\nimport Ruleset from './ruleset';\nimport Declaration from './declaration';\nimport DetachedRuleset from './detached-ruleset';\nimport Expression from './expression';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass Definition extends Ruleset {\n constructor(name, params, rules, condition, variadic, frames, visibilityInfo) {\n super();\n\n this.name = name || 'anonymous mixin';\n this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])];\n this.params = params;\n this.condition = condition;\n this.variadic = variadic;\n this.arity = params.length;\n this.rules = rules;\n this._lookups = {};\n const optionalParameters = [];\n this.required = params.reduce((count, p) => {\n if (!p.name || (p.name && !p.value)) {\n return count + 1;\n }\n else {\n optionalParameters.push(p.name);\n return count;\n }\n }, 0);\n this.optionalParameters = optionalParameters;\n this.frames = frames;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n if (this.params && this.params.length) {\n this.params = visitor.visitArray(this.params);\n }\n this.rules = visitor.visitArray(this.rules);\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n evalParams(context, mixinEnv, args, evaldArguments) {\n /* jshint boss:true */\n const frame = new Ruleset(null, null);\n\n let varargs;\n let arg;\n const params = utils.copyArray(this.params);\n let i;\n let j;\n let val;\n let name;\n let isNamedFound;\n let argIndex;\n let argsLength = 0;\n\n if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) {\n frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit();\n }\n mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames));\n\n if (args) {\n args = utils.copyArray(args);\n argsLength = args.length;\n\n for (i = 0; i < argsLength; i++) {\n arg = args[i];\n if (name = (arg && arg.name)) {\n isNamedFound = false;\n for (j = 0; j < params.length; j++) {\n if (!evaldArguments[j] && name === params[j].name) {\n evaldArguments[j] = arg.value.eval(context);\n frame.prependRule(new Declaration(name, arg.value.eval(context)));\n isNamedFound = true;\n break;\n }\n }\n if (isNamedFound) {\n args.splice(i, 1);\n i--;\n continue;\n } else {\n throw { type: 'Runtime', message: `Named argument for ${this.name} ${args[i].name} not found` };\n }\n }\n }\n }\n argIndex = 0;\n for (i = 0; i < params.length; i++) {\n if (evaldArguments[i]) { continue; }\n\n arg = args && args[argIndex];\n\n if (name = params[i].name) {\n if (params[i].variadic) {\n varargs = [];\n for (j = argIndex; j < argsLength; j++) {\n varargs.push(args[j].value.eval(context));\n }\n frame.prependRule(new Declaration(name, new Expression(varargs).eval(context)));\n } else {\n val = arg && arg.value;\n if (val) {\n // This was a mixin call, pass in a detached ruleset of it's eval'd rules\n if (Array.isArray(val)) {\n val = new DetachedRuleset(new Ruleset('', val));\n }\n else {\n val = val.eval(context);\n }\n } else if (params[i].value) {\n val = params[i].value.eval(mixinEnv);\n frame.resetCache();\n } else {\n throw { type: 'Runtime', message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` };\n }\n\n frame.prependRule(new Declaration(name, val));\n evaldArguments[i] = val;\n }\n }\n\n if (params[i].variadic && args) {\n for (j = argIndex; j < argsLength; j++) {\n evaldArguments[j] = args[j].value.eval(context);\n }\n }\n argIndex++;\n }\n\n return frame;\n }\n\n makeImportant() {\n const rules = !this.rules ? this.rules : this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant(true);\n } else {\n return r;\n }\n });\n const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames);\n return result;\n }\n\n eval(context) {\n return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames));\n }\n\n evalCall(context, args, important) {\n const _arguments = [];\n const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames;\n const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments);\n let rules;\n let ruleset;\n\n frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context)));\n\n rules = utils.copyArray(this.rules);\n\n ruleset = new Ruleset(null, rules);\n ruleset.originalRuleset = this;\n ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames)));\n if (important) {\n ruleset = ruleset.makeImportant();\n }\n return ruleset;\n }\n\n matchCondition(args, context) {\n if (this.condition && !this.condition.eval(\n new contexts.Eval(context,\n [this.evalParams(context, /* the parameter variables */\n new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])]\n .concat(this.frames || []) // the parent namespace/mixin frames\n .concat(context.frames)))) { // the current environment frames\n return false;\n }\n return true;\n }\n\n matchArgs(args, context) {\n const allArgsCnt = (args && args.length) || 0;\n let len;\n const optionalParameters = this.optionalParameters;\n const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => {\n if (optionalParameters.indexOf(p.name) < 0) {\n return count + 1;\n } else {\n return count;\n }\n }, 0);\n\n if (!this.variadic) {\n if (requiredArgsCnt < this.required) {\n return false;\n }\n if (allArgsCnt > this.params.length) {\n return false;\n }\n } else {\n if (requiredArgsCnt < (this.required - 1)) {\n return false;\n }\n }\n\n // check patterns\n len = Math.min(requiredArgsCnt, this.arity);\n\n for (let i = 0; i < len; i++) {\n if (!this.params[i].name && !this.params[i].variadic) {\n if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) {\n return false;\n }\n }\n }\n return true;\n }\n}\n\nDefinition.prototype.type = 'MixinDefinition';\nDefinition.prototype.evalFirst = true;\nexport default Definition;\n","import Node from './node';\nimport Selector from './selector';\nimport MixinDefinition from './mixin-definition';\nimport defaultFunc from '../functions/default';\n\nclass MixinCall extends Node {\n constructor(elements, args, index, currentFileInfo, important) {\n super();\n\n this.selector = new Selector(elements);\n this.arguments = args || [];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.important = important;\n this.allowRoot = true;\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n if (this.selector) {\n this.selector = visitor.visit(this.selector);\n }\n if (this.arguments.length) {\n this.arguments = visitor.visitArray(this.arguments);\n }\n }\n\n eval(context) {\n let mixins;\n let mixin;\n let mixinPath;\n const args = [];\n let arg;\n let argValue;\n const rules = [];\n let match = false;\n let i;\n let m;\n let f;\n let isRecursive;\n let isOneFound;\n const candidates = [];\n let candidate;\n const conditionResult = [];\n let defaultResult;\n const defFalseEitherCase = -1;\n const defNone = 0;\n const defTrue = 1;\n const defFalse = 2;\n let count;\n let originalRuleset;\n let noArgumentsFilter;\n\n this.selector = this.selector.eval(context);\n\n function calcDefGroup(mixin, mixinPath) {\n let f;\n let p;\n let namespace;\n\n for (f = 0; f < 2; f++) {\n conditionResult[f] = true;\n defaultFunc.value(f);\n for (p = 0; p < mixinPath.length && conditionResult[f]; p++) {\n namespace = mixinPath[p];\n if (namespace.matchCondition) {\n conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context);\n }\n }\n if (mixin.matchCondition) {\n conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context);\n }\n }\n if (conditionResult[0] || conditionResult[1]) {\n if (conditionResult[0] != conditionResult[1]) {\n return conditionResult[1] ?\n defTrue : defFalse;\n }\n\n return defNone;\n }\n return defFalseEitherCase;\n }\n\n for (i = 0; i < this.arguments.length; i++) {\n arg = this.arguments[i];\n argValue = arg.value.eval(context);\n if (arg.expand && Array.isArray(argValue.value)) {\n argValue = argValue.value;\n for (m = 0; m < argValue.length; m++) {\n args.push({value: argValue[m]});\n }\n } else {\n args.push({name: arg.name, value: argValue});\n }\n }\n\n noArgumentsFilter = rule => rule.matchArgs(null, context);\n\n for (i = 0; i < context.frames.length; i++) {\n if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) {\n isOneFound = true;\n\n // To make `default()` function independent of definition order we have two \"subpasses\" here.\n // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`),\n // and build candidate list with corresponding flags. Then, when we know all possible matches,\n // we make a final decision.\n\n for (m = 0; m < mixins.length; m++) {\n mixin = mixins[m].rule;\n mixinPath = mixins[m].path;\n isRecursive = false;\n for (f = 0; f < context.frames.length; f++) {\n if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) {\n isRecursive = true;\n break;\n }\n }\n if (isRecursive) {\n continue;\n }\n\n if (mixin.matchArgs(args, context)) {\n candidate = {mixin, group: calcDefGroup(mixin, mixinPath)};\n\n if (candidate.group !== defFalseEitherCase) {\n candidates.push(candidate);\n }\n\n match = true;\n }\n }\n\n defaultFunc.reset();\n\n count = [0, 0, 0];\n for (m = 0; m < candidates.length; m++) {\n count[candidates[m].group]++;\n }\n\n if (count[defNone] > 0) {\n defaultResult = defFalse;\n } else {\n defaultResult = defTrue;\n if ((count[defTrue] + count[defFalse]) > 1) {\n throw { type: 'Runtime',\n message: `Ambiguous use of \\`default()\\` found when matching for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n for (m = 0; m < candidates.length; m++) {\n candidate = candidates[m].group;\n if ((candidate === defNone) || (candidate === defaultResult)) {\n try {\n mixin = candidates[m].mixin;\n if (!(mixin instanceof MixinDefinition)) {\n originalRuleset = mixin.originalRuleset || mixin;\n mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo());\n mixin.originalRuleset = originalRuleset;\n }\n const newRules = mixin.evalCall(context, args, this.important).rules;\n this._setVisibilityToReplacement(newRules);\n Array.prototype.push.apply(rules, newRules);\n } catch (e) {\n throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack };\n }\n }\n }\n\n if (match) {\n return rules;\n }\n }\n }\n if (isOneFound) {\n throw { type: 'Runtime',\n message: `No matching definition was found for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n } else {\n throw { type: 'Name',\n message: `${this.selector.toCSS().trim()} is undefined`,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n _setVisibilityToReplacement(replacement) {\n let i;\n let rule;\n if (this.blocksVisibility()) {\n for (i = 0; i < replacement.length; i++) {\n rule = replacement[i];\n rule.addVisibilityBlock();\n }\n }\n }\n\n format(args) {\n return `${this.selector.toCSS().trim()}(${args ? args.map(a => {\n let argValue = '';\n if (a.name) {\n argValue += `${a.name}:`;\n }\n if (a.value.toCSS) {\n argValue += a.value.toCSS();\n } else {\n argValue += '???';\n }\n return argValue;\n }).join(', ') : ''})`;\n }\n}\n\nMixinCall.prototype.type = 'MixinCall';\nexport default MixinCall;\n","const tree = Object.create(null);\n\nimport Node from './node';\nimport Color from './color';\nimport AtRule from './atrule';\nimport DetachedRuleset from './detached-ruleset';\nimport Operation from './operation';\nimport Dimension from './dimension';\nimport Unit from './unit';\nimport Keyword from './keyword';\nimport Variable from './variable';\nimport Property from './property';\nimport Ruleset from './ruleset';\nimport Element from './element';\nimport Attribute from './attribute';\nimport Combinator from './combinator';\nimport Selector from './selector';\nimport Quoted from './quoted';\nimport Expression from './expression';\nimport Declaration from './declaration';\nimport Call from './call';\nimport URL from './url';\nimport Import from './import';\nimport Comment from './comment';\nimport Anonymous from './anonymous';\nimport Value from './value';\nimport JavaScript from './javascript';\nimport Assignment from './assignment';\nimport Condition from './condition';\nimport Paren from './paren';\nimport Media from './media';\nimport UnicodeDescriptor from './unicode-descriptor';\nimport Negative from './negative';\nimport Extend from './extend';\nimport VariableCall from './variable-call';\nimport NamespaceValue from './namespace-value';\n\n// mixins\nimport MixinCall from './mixin-call';\nimport MixinDefinition from './mixin-definition';\n\nexport default {\n Node, Color, AtRule, DetachedRuleset, Operation,\n Dimension, Unit, Keyword, Variable, Property,\n Ruleset, Element, Attribute, Combinator, Selector,\n Quoted, Expression, Declaration, Call, URL, Import,\n Comment, Anonymous, Value, JavaScript, Assignment,\n Condition, Paren, Media, UnicodeDescriptor, Negative,\n Extend, VariableCall, NamespaceValue,\n mixin: {\n Call: MixinCall,\n Definition: MixinDefinition\n }\n};","export default {\n error: function(msg) {\n this._fireEvent('error', msg);\n },\n warn: function(msg) {\n this._fireEvent('warn', msg);\n },\n info: function(msg) {\n this._fireEvent('info', msg);\n },\n debug: function(msg) {\n this._fireEvent('debug', msg);\n },\n addListener: function(listener) {\n this._listeners.push(listener);\n },\n removeListener: function(listener) {\n for (let i = 0; i < this._listeners.length; i++) {\n if (this._listeners[i] === listener) {\n this._listeners.splice(i, 1);\n return;\n }\n }\n },\n _fireEvent: function(type, msg) {\n for (let i = 0; i < this._listeners.length; i++) {\n const logFunction = this._listeners[i][type];\n if (logFunction) {\n logFunction(msg);\n }\n }\n },\n _listeners: []\n};\n","/**\n * @todo Document why this abstraction exists, and the relationship between\n * environment, file managers, and plugin manager\n */\n\nimport logger from '../logger';\n\nclass environment {\n constructor(externalEnvironment, fileManagers) {\n this.fileManagers = fileManagers || [];\n externalEnvironment = externalEnvironment || {};\n\n const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator'];\n const requiredFunctions = [];\n const functions = requiredFunctions.concat(optionalFunctions);\n\n for (let i = 0; i < functions.length; i++) {\n const propName = functions[i];\n const environmentFunc = externalEnvironment[propName];\n if (environmentFunc) {\n this[propName] = environmentFunc.bind(externalEnvironment);\n } else if (i < requiredFunctions.length) {\n this.warn(`missing required function in environment - ${propName}`);\n }\n }\n }\n\n getFileManager(filename, currentDirectory, options, environment, isSync) {\n\n if (!filename) {\n logger.warn('getFileManager called with no filename.. Please report this issue. continuing.');\n }\n if (currentDirectory == null) {\n logger.warn('getFileManager called with null directory.. Please report this issue. continuing.');\n }\n\n let fileManagers = this.fileManagers;\n if (options.pluginManager) {\n fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers());\n }\n for (let i = fileManagers.length - 1; i >= 0 ; i--) {\n const fileManager = fileManagers[i];\n if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) {\n return fileManager;\n }\n }\n return null;\n }\n\n addFileManager(fileManager) {\n this.fileManagers.push(fileManager);\n }\n\n clearFileManagers() {\n this.fileManagers = [];\n }\n}\n\nexport default environment;\n","class AbstractFileManager {\n getPath(filename) {\n let j = filename.lastIndexOf('?');\n if (j > 0) {\n filename = filename.slice(0, j);\n }\n j = filename.lastIndexOf('/');\n if (j < 0) {\n j = filename.lastIndexOf('\\\\');\n }\n if (j < 0) {\n return '';\n }\n return filename.slice(0, j + 1);\n }\n\n tryAppendExtension(path, ext) {\n return /(\\.[a-z]*$)|([\\?;].*)$/.test(path) ? path : path + ext;\n }\n\n tryAppendLessExtension(path) {\n return this.tryAppendExtension(path, '.less');\n };\n\n supportsSync() { return false; }\n\n alwaysMakePathsAbsolute() { return false; }\n\n isPathAbsolute(filename) {\n return (/^(?:[a-z-]+:|\\/|\\\\|#)/i).test(filename);\n }\n // TODO: pull out / replace?\n join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return basePath + laterPath;\n };\n\n pathDiff(url, baseUrl) {\n // diff between two paths to create a relative path\n const urlParts = this.extractUrlParts(url);\n const baseUrlParts = this.extractUrlParts(baseUrl);\n\n let i;\n let max;\n let urlDirectories;\n let baseUrlDirectories;\n let diff = '';\n if (urlParts.hostPart !== baseUrlParts.hostPart) {\n return '';\n }\n max = Math.max(baseUrlParts.directories.length, urlParts.directories.length);\n for (i = 0; i < max; i++) {\n if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; }\n }\n baseUrlDirectories = baseUrlParts.directories.slice(i);\n urlDirectories = urlParts.directories.slice(i);\n for (i = 0; i < baseUrlDirectories.length - 1; i++) {\n diff += '../';\n }\n for (i = 0; i < urlDirectories.length - 1; i++) {\n diff += `${urlDirectories[i]}/`;\n }\n return diff;\n };\n // helper function, not part of API\n extractUrlParts(url, baseUrl) {\n // urlParts[1] = protocol://hostname/ OR /\n // urlParts[2] = / if path relative to host base\n // urlParts[3] = directories\n // urlParts[4] = filename\n // urlParts[5] = parameters\n\n const urlPartsRegex = /^((?:[a-z-]+:)?\\/{2}(?:[^\\/\\?#]*\\/)|([\\/\\\\]))?((?:[^\\/\\\\\\?#]*[\\/\\\\])*)([^\\/\\\\\\?#]*)([#\\?].*)?$/i;\n\n const urlParts = url.match(urlPartsRegex);\n const returner = {};\n let rawDirectories = [];\n const directories = [];\n let i;\n let baseUrlParts;\n\n if (!urlParts) {\n throw new Error(`Could not parse sheet href - '${url}'`);\n }\n\n // Stylesheets in IE don't always return the full path\n if (baseUrl && (!urlParts[1] || urlParts[2])) {\n baseUrlParts = baseUrl.match(urlPartsRegex);\n if (!baseUrlParts) {\n throw new Error(`Could not parse page url - '${baseUrl}'`);\n }\n urlParts[1] = urlParts[1] || baseUrlParts[1] || '';\n if (!urlParts[2]) {\n urlParts[3] = baseUrlParts[3] + urlParts[3];\n }\n }\n\n if (urlParts[3]) {\n rawDirectories = urlParts[3].replace(/\\\\/g, '/').split('/');\n\n // collapse '..' and skip '.'\n for (i = 0; i < rawDirectories.length; i++) {\n\n if (rawDirectories[i] === '..') {\n directories.pop();\n }\n else if (rawDirectories[i] !== '.') {\n directories.push(rawDirectories[i]);\n }\n \n }\n }\n\n returner.hostPart = urlParts[1];\n returner.directories = directories;\n returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/');\n returner.path = (urlParts[1] || '') + directories.join('/');\n returner.filename = urlParts[4];\n returner.fileUrl = returner.path + (urlParts[4] || '');\n returner.url = returner.fileUrl + (urlParts[5] || '');\n return returner;\n };\n}\n\nexport default AbstractFileManager;\n","import functionRegistry from '../functions/function-registry';\nimport LessError from '../less-error';\n\nclass AbstractPluginLoader {\n constructor() {\n // Implemented by Node.js plugin loader\n this.require = () => null\n }\n\n evalPlugin(contents, context, imports, pluginOptions, fileInfo) {\n let loader;\n let registry;\n let pluginObj;\n let localModule;\n let pluginManager;\n let filename;\n let result;\n\n pluginManager = context.pluginManager;\n\n if (fileInfo) {\n if (typeof fileInfo === 'string') {\n filename = fileInfo;\n }\n else {\n filename = fileInfo.filename;\n }\n }\n const shortname = (new this.less.FileManager()).extractUrlParts(filename).filename;\n\n if (filename) {\n pluginObj = pluginManager.get(filename);\n\n if (pluginObj) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n return pluginObj;\n }\n }\n localModule = {\n exports: {},\n pluginManager,\n fileInfo\n };\n registry = functionRegistry.create();\n\n const registerPlugin = obj => {\n pluginObj = obj;\n };\n\n try {\n loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents);\n loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo);\n }\n catch (e) {\n return new LessError(e, imports, filename);\n }\n\n if (!pluginObj) {\n pluginObj = localModule.exports;\n }\n pluginObj = this.validatePlugin(pluginObj, filename, shortname);\n\n if (pluginObj instanceof LessError) {\n return pluginObj;\n }\n\n if (pluginObj) {\n pluginObj.imports = imports;\n pluginObj.filename = filename;\n\n // For < 3.x (or unspecified minVersion) - setOptions() before install()\n if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n\n if (result) {\n return result;\n }\n }\n\n // Run on first load\n pluginManager.addPlugin(pluginObj, fileInfo.filename, registry);\n pluginObj.functions = registry.getLocalFunctions();\n\n // Need to call setOptions again because the pluginObj might have functions\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n\n // Run every @plugin call\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n\n }\n else {\n return new LessError({ message: 'Not a valid plugin' }, imports, filename);\n }\n\n return pluginObj;\n }\n\n trySetOptions(plugin, filename, name, options) {\n if (options && !plugin.setOptions) {\n return new LessError({\n message: `Options have been provided but the plugin ${name} does not support any options.`\n });\n }\n try {\n plugin.setOptions && plugin.setOptions(options);\n }\n catch (e) {\n return new LessError(e);\n }\n }\n\n validatePlugin(plugin, filename, name) {\n if (plugin) {\n // support plugins being a function\n // so that the plugin can be more usable programmatically\n if (typeof plugin === 'function') {\n plugin = new plugin();\n }\n\n if (plugin.minVersion) {\n if (this.compareVersion(plugin.minVersion, this.less.version) < 0) {\n return new LessError({\n message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}`\n });\n }\n }\n return plugin;\n }\n return null;\n }\n\n compareVersion(aVersion, bVersion) {\n if (typeof aVersion === 'string') {\n aVersion = aVersion.match(/^(\\d+)\\.?(\\d+)?\\.?(\\d+)?/);\n aVersion.shift();\n }\n for (let i = 0; i < aVersion.length; i++) {\n if (aVersion[i] !== bVersion[i]) {\n return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1;\n }\n }\n return 0;\n }\n\n versionToString(version) {\n let versionString = '';\n for (let i = 0; i < version.length; i++) {\n versionString += (versionString ? '.' : '') + version[i];\n }\n return versionString;\n }\n\n printUsage(plugins) {\n for (let i = 0; i < plugins.length; i++) {\n const plugin = plugins[i];\n if (plugin.printUsage) {\n plugin.printUsage();\n }\n }\n }\n}\n\nexport default AbstractPluginLoader;\n\n","import tree from '../tree';\nconst _visitArgs = { visitDeeper: true };\nlet _hasIndexed = false;\n\nfunction _noop(node) {\n return node;\n}\n\nfunction indexNodeTypes(parent, ticker) {\n // add .typeIndex to tree node types for lookup table\n let key;\n\n let child;\n for (key in parent) { \n /* eslint guard-for-in: 0 */\n child = parent[key];\n switch (typeof child) {\n case 'function':\n // ignore bound functions directly on tree which do not have a prototype\n // or aren't nodes\n if (child.prototype && child.prototype.type) {\n child.prototype.typeIndex = ticker++;\n }\n break;\n case 'object':\n ticker = indexNodeTypes(child, ticker);\n break;\n \n }\n }\n return ticker;\n}\n\nclass Visitor {\n constructor(implementation) {\n this._implementation = implementation;\n this._visitInCache = {};\n this._visitOutCache = {};\n\n if (!_hasIndexed) {\n indexNodeTypes(tree, 1);\n _hasIndexed = true;\n }\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n\n const nodeTypeIndex = node.typeIndex;\n if (!nodeTypeIndex) {\n // MixinCall args aren't a node type?\n if (node.value && node.value.typeIndex) {\n this.visit(node.value);\n }\n return node;\n }\n\n const impl = this._implementation;\n let func = this._visitInCache[nodeTypeIndex];\n let funcOut = this._visitOutCache[nodeTypeIndex];\n const visitArgs = _visitArgs;\n let fnName;\n\n visitArgs.visitDeeper = true;\n\n if (!func) {\n fnName = `visit${node.type}`;\n func = impl[fnName] || _noop;\n funcOut = impl[`${fnName}Out`] || _noop;\n this._visitInCache[nodeTypeIndex] = func;\n this._visitOutCache[nodeTypeIndex] = funcOut;\n }\n\n if (func !== _noop) {\n const newNode = func.call(impl, node, visitArgs);\n if (node && impl.isReplacing) {\n node = newNode;\n }\n }\n\n if (visitArgs.visitDeeper && node && node.accept) {\n node.accept(this);\n }\n\n if (funcOut != _noop) {\n funcOut.call(impl, node);\n }\n\n return node;\n }\n\n visitArray(nodes, nonReplacing) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n\n // Non-replacing\n if (nonReplacing || !this._implementation.isReplacing) {\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n // Replacing\n const out = [];\n for (i = 0; i < cnt; i++) {\n const evald = this.visit(nodes[i]);\n if (evald === undefined) { continue; }\n if (!evald.splice) {\n out.push(evald);\n } else if (evald.length) {\n this.flatten(evald, out);\n }\n }\n return out;\n }\n\n flatten(arr, out) {\n if (!out) {\n out = [];\n }\n\n let cnt;\n let i;\n let item;\n let nestedCnt;\n let j;\n let nestedItem;\n\n for (i = 0, cnt = arr.length; i < cnt; i++) {\n item = arr[i];\n if (item === undefined) {\n continue;\n }\n if (!item.splice) {\n out.push(item);\n continue;\n }\n\n for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) {\n nestedItem = item[j];\n if (nestedItem === undefined) {\n continue;\n }\n if (!nestedItem.splice) {\n out.push(nestedItem);\n } else if (nestedItem.length) {\n this.flatten(nestedItem, out);\n }\n }\n }\n\n return out;\n }\n}\n\nexport default Visitor;\n","class ImportSequencer {\n constructor(onSequencerEmpty) {\n this.imports = [];\n this.variableImports = [];\n this._onSequencerEmpty = onSequencerEmpty;\n this._currentDepth = 0;\n }\n\n addImport(callback) {\n const importSequencer = this;\n\n const importItem = {\n callback,\n args: null,\n isReady: false\n };\n\n this.imports.push(importItem);\n return function(...args) {\n importItem.args = Array.prototype.slice.call(args, 0);\n importItem.isReady = true;\n importSequencer.tryRun();\n };\n }\n\n addVariableImport(callback) {\n this.variableImports.push(callback);\n }\n\n tryRun() {\n this._currentDepth++;\n try {\n while (true) {\n while (this.imports.length > 0) {\n const importItem = this.imports[0];\n if (!importItem.isReady) {\n return;\n }\n this.imports = this.imports.slice(1);\n importItem.callback.apply(null, importItem.args);\n }\n if (this.variableImports.length === 0) {\n break;\n }\n const variableImport = this.variableImports[0];\n this.variableImports = this.variableImports.slice(1);\n variableImport();\n }\n } finally {\n this._currentDepth--;\n }\n if (this._currentDepth === 0 && this._onSequencerEmpty) {\n this._onSequencerEmpty();\n }\n }\n}\n\nexport default ImportSequencer;\n","import contexts from '../contexts';\nimport Visitor from './visitor';\nimport ImportSequencer from './import-sequencer';\nimport * as utils from '../utils';\n\nconst ImportVisitor = function(importer, finish) {\n\n this._visitor = new Visitor(this);\n this._importer = importer;\n this._finish = finish;\n this.context = new contexts.Eval();\n this.importCount = 0;\n this.onceFileDetectionMap = {};\n this.recursionDetector = {};\n this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this));\n};\n\nImportVisitor.prototype = {\n isReplacing: false,\n run: function (root) {\n try {\n // process the contents\n this._visitor.visit(root);\n }\n catch (e) {\n this.error = e;\n }\n\n this.isFinished = true;\n this._sequencer.tryRun();\n },\n _onSequencerEmpty: function() {\n if (!this.isFinished) {\n return;\n }\n this._finish(this.error);\n },\n visitImport: function (importNode, visitArgs) {\n const inlineCSS = importNode.options.inline;\n\n if (!importNode.css || inlineCSS) {\n\n const context = new contexts.Eval(this.context, utils.copyArray(this.context.frames));\n const importParent = context.frames[0];\n\n this.importCount++;\n if (importNode.isVariableImport()) {\n this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent));\n } else {\n this.processImportNode(importNode, context, importParent);\n }\n }\n visitArgs.visitDeeper = false;\n },\n processImportNode: function(importNode, context, importParent) {\n let evaldImportNode;\n const inlineCSS = importNode.options.inline;\n\n try {\n evaldImportNode = importNode.evalForImport(context);\n } catch (e) {\n if (!e.filename) { e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename; }\n // attempt to eval properly and treat as css\n importNode.css = true;\n // if that fails, this error will be thrown\n importNode.error = e;\n }\n\n if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) {\n if (evaldImportNode.options.multiple) {\n context.importMultiple = true;\n }\n\n // try appending if we haven't determined if it is css or not\n const tryAppendLessExtension = evaldImportNode.css === undefined;\n\n for (let i = 0; i < importParent.rules.length; i++) {\n if (importParent.rules[i] === importNode) {\n importParent.rules[i] = evaldImportNode;\n break;\n }\n }\n\n const onImported = this.onImported.bind(this, evaldImportNode, context);\n const sequencedOnImported = this._sequencer.addImport(onImported);\n\n this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(),\n evaldImportNode.options, sequencedOnImported);\n } else {\n this.importCount--;\n if (this.isFinished) {\n this._sequencer.tryRun();\n }\n }\n },\n onImported: function (importNode, context, e, root, importedAtRoot, fullPath) {\n if (e) {\n if (!e.filename) {\n e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename;\n }\n this.error = e;\n }\n\n const importVisitor = this;\n const inlineCSS = importNode.options.inline;\n const isPlugin = importNode.options.isPlugin;\n const isOptional = importNode.options.optional;\n const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector;\n\n if (!context.importMultiple) {\n if (duplicateImport) {\n importNode.skip = true;\n } else {\n importNode.skip = () => {\n if (fullPath in importVisitor.onceFileDetectionMap) {\n return true;\n }\n importVisitor.onceFileDetectionMap[fullPath] = true;\n return false;\n };\n }\n }\n\n if (!fullPath && isOptional) {\n importNode.skip = true;\n }\n\n if (root) {\n importNode.root = root;\n importNode.importedFilename = fullPath;\n\n if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) {\n importVisitor.recursionDetector[fullPath] = true;\n\n const oldContext = this.context;\n this.context = context;\n try {\n this._visitor.visit(root);\n } catch (e) {\n this.error = e;\n }\n this.context = oldContext;\n }\n }\n\n importVisitor.importCount--;\n\n if (importVisitor.isFinished) {\n importVisitor._sequencer.tryRun();\n }\n },\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.unshift(declNode);\n } else {\n visitArgs.visitDeeper = false;\n }\n },\n visitDeclarationOut: function(declNode) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.shift();\n }\n },\n visitAtRule: function (atRuleNode, visitArgs) {\n this.context.frames.unshift(atRuleNode);\n },\n visitAtRuleOut: function (atRuleNode) {\n this.context.frames.shift();\n },\n visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {\n this.context.frames.unshift(mixinDefinitionNode);\n },\n visitMixinDefinitionOut: function (mixinDefinitionNode) {\n this.context.frames.shift();\n },\n visitRuleset: function (rulesetNode, visitArgs) {\n this.context.frames.unshift(rulesetNode);\n },\n visitRulesetOut: function (rulesetNode) {\n this.context.frames.shift();\n },\n visitMedia: function (mediaNode, visitArgs) {\n this.context.frames.unshift(mediaNode.rules[0]);\n },\n visitMediaOut: function (mediaNode) {\n this.context.frames.shift();\n }\n};\nexport default ImportVisitor;\n","class SetTreeVisibilityVisitor {\n constructor(visible) {\n this.visible = visible;\n }\n\n run(root) {\n this.visit(root);\n }\n\n visitArray(nodes) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n if (node.constructor === Array) {\n return this.visitArray(node);\n }\n\n if (!node.blocksVisibility || node.blocksVisibility()) {\n return node;\n }\n if (this.visible) {\n node.ensureVisibility();\n } else {\n node.ensureInvisibility();\n }\n\n node.accept(this);\n return node;\n }\n}\n\nexport default SetTreeVisibilityVisitor;","import tree from '../tree';\nimport Visitor from './visitor';\nimport logger from '../logger';\nimport * as utils from '../utils';\n\n/* jshint loopfunc:true */\n\nclass ExtendFinderVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n this.contexts = [];\n this.allExtendsStack = [[]];\n }\n\n run(root) {\n root = this._visitor.visit(root);\n root.allExtends = this.allExtendsStack[0];\n return root;\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n\n let i;\n let j;\n let extend;\n const allSelectorsExtendList = [];\n let extendList;\n\n // get &:extend(.a); rules which apply to all selectors in this ruleset\n const rules = rulesetNode.rules;\n\n const ruleCnt = rules ? rules.length : 0;\n for (i = 0; i < ruleCnt; i++) {\n if (rulesetNode.rules[i] instanceof tree.Extend) {\n allSelectorsExtendList.push(rules[i]);\n rulesetNode.extendOnEveryPath = true;\n }\n }\n\n // now find every selector and apply the extends that apply to all extends\n // and the ones which apply to an individual extend\n const paths = rulesetNode.paths;\n for (i = 0; i < paths.length; i++) {\n const selectorPath = paths[i];\n const selector = selectorPath[selectorPath.length - 1];\n const selExtendList = selector.extendList;\n\n extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList)\n : allSelectorsExtendList;\n\n if (extendList) {\n extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone());\n }\n\n for (j = 0; j < extendList.length; j++) {\n this.foundExtends = true;\n extend = extendList[j];\n extend.findSelfSelectors(selectorPath);\n extend.ruleset = rulesetNode;\n if (j === 0) { extend.firstExtendOnThisSelectorPath = true; }\n this.allExtendsStack[this.allExtendsStack.length - 1].push(extend);\n }\n }\n\n this.contexts.push(rulesetNode.selectors);\n }\n\n visitRulesetOut(rulesetNode) {\n if (!rulesetNode.root) {\n this.contexts.length = this.contexts.length - 1;\n }\n }\n\n visitMedia(mediaNode, visitArgs) {\n mediaNode.allExtends = [];\n this.allExtendsStack.push(mediaNode.allExtends);\n }\n\n visitMediaOut(mediaNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n atRuleNode.allExtends = [];\n this.allExtendsStack.push(atRuleNode.allExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n}\n\nclass ProcessExtendsVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n const extendFinder = new ExtendFinderVisitor();\n this.extendIndices = {};\n extendFinder.run(root);\n if (!extendFinder.foundExtends) { return root; }\n root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends));\n this.allExtendsStack = [root.allExtends];\n const newRoot = this._visitor.visit(root);\n this.checkExtendsForNonMatched(root.allExtends);\n return newRoot;\n }\n\n checkExtendsForNonMatched(extendList) {\n const indices = this.extendIndices;\n extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => {\n let selector = '_unknown_';\n try {\n selector = extend.selector.toCSS({});\n }\n catch (_) {}\n\n if (!indices[`${extend.index} ${selector}`]) {\n indices[`${extend.index} ${selector}`] = true;\n logger.warn(`extend '${selector}' has no matches`);\n }\n });\n }\n\n doExtendChaining(extendsList, extendsListTarget, iterationCount) {\n //\n // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering\n // and pasting the selector we would do normally, but we are also adding an extend with the same target selector\n // this means this new extend can then go and alter other extends\n //\n // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors\n // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already\n // processed if we look at each selector at a time, as is done in visitRuleset\n\n let extendIndex;\n\n let targetExtendIndex;\n let matches;\n const extendsToAdd = [];\n let newSelector;\n const extendVisitor = this;\n let selectorPath;\n let extend;\n let targetExtend;\n let newExtend;\n\n iterationCount = iterationCount || 0;\n\n // loop through comparing every extend with every target extend.\n // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place\n // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one\n // and the second is the target.\n // the separation into two lists allows us to process a subset of chains with a bigger set, as is the\n // case when processing media queries\n for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) {\n for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) {\n\n extend = extendsList[extendIndex];\n targetExtend = extendsListTarget[targetExtendIndex];\n\n // look for circular references\n if ( extend.parent_ids.indexOf( targetExtend.object_id ) >= 0 ) { continue; }\n\n // find a match in the target extends self selector (the bit before :extend)\n selectorPath = [targetExtend.selfSelectors[0]];\n matches = extendVisitor.findMatch(extend, selectorPath);\n\n if (matches.length) {\n extend.hasFoundMatches = true;\n\n // we found a match, so for each self selector..\n extend.selfSelectors.forEach(selfSelector => {\n const info = targetExtend.visibilityInfo();\n\n // process the extend as usual\n newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible());\n\n // but now we create a new extend from it\n newExtend = new(tree.Extend)(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info);\n newExtend.selfSelectors = newSelector;\n\n // add the extend onto the list of extends for that selector\n newSelector[newSelector.length - 1].extendList = [newExtend];\n\n // record that we need to add it.\n extendsToAdd.push(newExtend);\n newExtend.ruleset = targetExtend.ruleset;\n\n // remember its parents for circular references\n newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids);\n\n // only process the selector once.. if we have :extend(.a,.b) then multiple\n // extends will look at the same selector path, so when extending\n // we know that any others will be duplicates in terms of what is added to the css\n if (targetExtend.firstExtendOnThisSelectorPath) {\n newExtend.firstExtendOnThisSelectorPath = true;\n targetExtend.ruleset.paths.push(newSelector);\n }\n });\n }\n }\n }\n\n if (extendsToAdd.length) {\n // try to detect circular references to stop a stack overflow.\n // may no longer be needed.\n this.extendChainCount++;\n if (iterationCount > 100) {\n let selectorOne = '{unable to calculate}';\n let selectorTwo = '{unable to calculate}';\n try {\n selectorOne = extendsToAdd[0].selfSelectors[0].toCSS();\n selectorTwo = extendsToAdd[0].selector.toCSS();\n }\n catch (e) {}\n throw { message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})`};\n }\n\n // now process the new extends on the existing rules so that we can handle a extending b extending c extending\n // d extending e...\n return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1));\n } else {\n return extendsToAdd;\n }\n }\n\n visitDeclaration(ruleNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitSelector(selectorNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n let matches;\n let pathIndex;\n let extendIndex;\n const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1];\n const selectorsToAdd = [];\n const extendVisitor = this;\n let selectorPath;\n\n // look at each selector path in the ruleset, find any extend matches and then copy, find and replace\n\n for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) {\n for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) {\n selectorPath = rulesetNode.paths[pathIndex];\n\n // extending extends happens initially, before the main pass\n if (rulesetNode.extendOnEveryPath) { continue; }\n const extendList = selectorPath[selectorPath.length - 1].extendList;\n if (extendList && extendList.length) { continue; }\n\n matches = this.findMatch(allExtends[extendIndex], selectorPath);\n\n if (matches.length) {\n allExtends[extendIndex].hasFoundMatches = true;\n\n allExtends[extendIndex].selfSelectors.forEach(selfSelector => {\n let extendedSelectors;\n extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible());\n selectorsToAdd.push(extendedSelectors);\n });\n }\n }\n }\n rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd);\n }\n\n findMatch(extend, haystackSelectorPath) {\n //\n // look through the haystack selector path to try and find the needle - extend.selector\n // returns an array of selector matches that can then be replaced\n //\n let haystackSelectorIndex;\n\n let hackstackSelector;\n let hackstackElementIndex;\n let haystackElement;\n let targetCombinator;\n let i;\n const extendVisitor = this;\n const needleElements = extend.selector.elements;\n const potentialMatches = [];\n let potentialMatch;\n const matches = [];\n\n // loop through the haystack elements\n for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) {\n hackstackSelector = haystackSelectorPath[haystackSelectorIndex];\n\n for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) {\n\n haystackElement = hackstackSelector.elements[hackstackElementIndex];\n\n // if we allow elements before our match we can add a potential match every time. otherwise only at the first element.\n if (extend.allowBefore || (haystackSelectorIndex === 0 && hackstackElementIndex === 0)) {\n potentialMatches.push({pathIndex: haystackSelectorIndex, index: hackstackElementIndex, matched: 0,\n initialCombinator: haystackElement.combinator});\n }\n\n for (i = 0; i < potentialMatches.length; i++) {\n potentialMatch = potentialMatches[i];\n\n // selectors add \" \" onto the first element. When we use & it joins the selectors together, but if we don't\n // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to\n // work out what the resulting combinator will be\n targetCombinator = haystackElement.combinator.value;\n if (targetCombinator === '' && hackstackElementIndex === 0) {\n targetCombinator = ' ';\n }\n\n // if we don't match, null our match to indicate failure\n if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) ||\n (potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator)) {\n potentialMatch = null;\n } else {\n potentialMatch.matched++;\n }\n\n // if we are still valid and have finished, test whether we have elements after and whether these are allowed\n if (potentialMatch) {\n potentialMatch.finished = potentialMatch.matched === needleElements.length;\n if (potentialMatch.finished &&\n (!extend.allowAfter &&\n (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length))) {\n potentialMatch = null;\n }\n }\n // if null we remove, if not, we are still valid, so either push as a valid match or continue\n if (potentialMatch) {\n if (potentialMatch.finished) {\n potentialMatch.length = needleElements.length;\n potentialMatch.endPathIndex = haystackSelectorIndex;\n potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match\n potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again\n matches.push(potentialMatch);\n }\n } else {\n potentialMatches.splice(i, 1);\n i--;\n }\n }\n }\n }\n return matches;\n }\n\n isElementValuesEqual(elementValue1, elementValue2) {\n if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') {\n return elementValue1 === elementValue2;\n }\n if (elementValue1 instanceof tree.Attribute) {\n if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) {\n return false;\n }\n if (!elementValue1.value || !elementValue2.value) {\n if (elementValue1.value || elementValue2.value) {\n return false;\n }\n return true;\n }\n elementValue1 = elementValue1.value.value || elementValue1.value;\n elementValue2 = elementValue2.value.value || elementValue2.value;\n return elementValue1 === elementValue2;\n }\n elementValue1 = elementValue1.value;\n elementValue2 = elementValue2.value;\n if (elementValue1 instanceof tree.Selector) {\n if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) {\n return false;\n }\n for (let i = 0; i < elementValue1.elements.length; i++) {\n if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) {\n if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) {\n return false;\n }\n }\n if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) {\n return false;\n }\n }\n return true;\n }\n return false;\n }\n\n extendSelector(matches, selectorPath, replacementSelector, isVisible) {\n // for a set of matches, replace each match with the replacement selector\n\n let currentSelectorPathIndex = 0;\n\n let currentSelectorPathElementIndex = 0;\n let path = [];\n let matchIndex;\n let selector;\n let firstElement;\n let match;\n let newElements;\n\n for (matchIndex = 0; matchIndex < matches.length; matchIndex++) {\n match = matches[matchIndex];\n selector = selectorPath[match.pathIndex];\n firstElement = new tree.Element(\n match.initialCombinator,\n replacementSelector.elements[0].value,\n replacementSelector.elements[0].isVariable,\n replacementSelector.elements[0].getIndex(),\n replacementSelector.elements[0].fileInfo()\n );\n\n if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n\n newElements = selector.elements\n .slice(currentSelectorPathElementIndex, match.index)\n .concat([firstElement])\n .concat(replacementSelector.elements.slice(1));\n\n if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) {\n path[path.length - 1].elements =\n path[path.length - 1].elements.concat(newElements);\n } else {\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex));\n\n path.push(new tree.Selector(\n newElements\n ));\n }\n currentSelectorPathIndex = match.endPathIndex;\n currentSelectorPathElementIndex = match.endPathElementIndex;\n if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) {\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n }\n\n if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathIndex++;\n }\n\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length));\n path = path.map(currentValue => {\n // we can re-use elements here, because the visibility property matters only for selectors\n const derived = currentValue.createDerived(currentValue.elements);\n if (isVisible) {\n derived.ensureVisibility();\n } else {\n derived.ensureInvisibility();\n }\n return derived;\n });\n return path;\n }\n\n visitMedia(mediaNode, visitArgs) {\n let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitMediaOut(mediaNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n}\n\nexport default ProcessExtendsVisitor;\n","import Visitor from './visitor';\n\nclass JoinSelectorVisitor {\n constructor() {\n this.contexts = [[]];\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n return this._visitor.visit(root);\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n const paths = [];\n let selectors;\n\n this.contexts.push(paths);\n\n if (!rulesetNode.root) {\n selectors = rulesetNode.selectors;\n if (selectors) {\n selectors = selectors.filter(selector => selector.getIsOutput());\n rulesetNode.selectors = selectors.length ? selectors : (selectors = null);\n if (selectors) { rulesetNode.joinSelectors(paths, context, selectors); }\n }\n if (!selectors) { rulesetNode.rules = null; }\n rulesetNode.paths = paths;\n }\n }\n\n visitRulesetOut(rulesetNode) {\n this.contexts.length = this.contexts.length - 1;\n }\n\n visitMedia(mediaNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia);\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n if (atRuleNode.rules && atRuleNode.rules.length) {\n atRuleNode.rules[0].root = (atRuleNode.isRooted || context.length === 0 || null);\n }\n }\n}\n\nexport default JoinSelectorVisitor;\n","import tree from '../tree';\nimport Visitor from './visitor';\n\nclass CSSVisitorUtils {\n constructor(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n }\n\n containsSilentNonBlockedChild(bodyRules) {\n let rule;\n if (!bodyRules) {\n return false;\n }\n for (let r = 0; r < bodyRules.length; r++) {\n rule = bodyRules[r];\n if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) {\n // the atrule contains something that was referenced (likely by extend)\n // therefore it needs to be shown in output too\n return true;\n }\n }\n return false;\n }\n\n keepOnlyVisibleChilds(owner) {\n if (owner && owner.rules) {\n owner.rules = owner.rules.filter(thing => thing.isVisible());\n }\n }\n\n isEmpty(owner) {\n return (owner && owner.rules) \n ? (owner.rules.length === 0) : true;\n }\n\n hasVisibleSelector(rulesetNode) {\n return (rulesetNode && rulesetNode.paths)\n ? (rulesetNode.paths.length > 0) : false;\n }\n\n resolveVisibility(node, originalRules) {\n if (!node.blocksVisibility()) {\n if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) {\n return ;\n }\n\n return node;\n }\n\n const compiledRulesBody = node.rules[0];\n this.keepOnlyVisibleChilds(compiledRulesBody);\n\n if (this.isEmpty(compiledRulesBody)) {\n return ;\n }\n\n node.ensureVisibility();\n node.removeVisibilityBlock();\n\n return node;\n }\n\n isVisibleRuleset(rulesetNode) {\n if (rulesetNode.firstRoot) {\n return true;\n }\n\n if (this.isEmpty(rulesetNode)) {\n return false;\n }\n\n if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) {\n return false;\n }\n\n return true;\n }\n}\n\nconst ToCSSVisitor = function(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n this.utils = new CSSVisitorUtils(context);\n};\n\nToCSSVisitor.prototype = {\n isReplacing: true,\n run: function (root) {\n return this._visitor.visit(root);\n },\n\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.blocksVisibility() || declNode.variable) {\n return;\n }\n return declNode;\n },\n\n visitMixinDefinition: function (mixinNode, visitArgs) {\n // mixin definitions do not get eval'd - this means they keep state\n // so we have to clear that state here so it isn't used if toCSS is called twice\n mixinNode.frames = [];\n },\n\n visitExtend: function (extendNode, visitArgs) {\n },\n\n visitComment: function (commentNode, visitArgs) {\n if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) {\n return;\n }\n return commentNode;\n },\n\n visitMedia: function(mediaNode, visitArgs) {\n const originalRules = mediaNode.rules[0].rules;\n mediaNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n return this.utils.resolveVisibility(mediaNode, originalRules);\n },\n\n visitImport: function (importNode, visitArgs) {\n if (importNode.blocksVisibility()) {\n return ;\n }\n return importNode;\n },\n\n visitAtRule: function(atRuleNode, visitArgs) {\n if (atRuleNode.rules && atRuleNode.rules.length) {\n return this.visitAtRuleWithBody(atRuleNode, visitArgs);\n } else {\n return this.visitAtRuleWithoutBody(atRuleNode, visitArgs);\n }\n },\n\n visitAnonymous: function(anonymousNode, visitArgs) {\n if (!anonymousNode.blocksVisibility()) {\n anonymousNode.accept(this._visitor);\n return anonymousNode;\n }\n },\n\n visitAtRuleWithBody: function(atRuleNode, visitArgs) {\n // if there is only one nested ruleset and that one has no path, then it is\n // just fake ruleset\n function hasFakeRuleset(atRuleNode) {\n const bodyRules = atRuleNode.rules;\n return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0);\n }\n function getBodyRules(atRuleNode) {\n const nodeRules = atRuleNode.rules;\n if (hasFakeRuleset(atRuleNode)) {\n return nodeRules[0].rules;\n }\n\n return nodeRules;\n }\n // it is still true that it is only one ruleset in array\n // this is last such moment\n // process childs\n const originalRules = getBodyRules(atRuleNode);\n atRuleNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n if (!this.utils.isEmpty(atRuleNode)) {\n this._mergeRules(atRuleNode.rules[0].rules);\n }\n\n return this.utils.resolveVisibility(atRuleNode, originalRules);\n },\n\n visitAtRuleWithoutBody: function(atRuleNode, visitArgs) {\n if (atRuleNode.blocksVisibility()) {\n return;\n }\n\n if (atRuleNode.name === '@charset') {\n // Only output the debug info together with subsequent @charset definitions\n // a comment (or @media statement) before the actual @charset atrule would\n // be considered illegal css as it has to be on the first line\n if (this.charset) {\n if (atRuleNode.debugInfo) {\n const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\\n/g, '')} */\\n`);\n comment.debugInfo = atRuleNode.debugInfo;\n return this._visitor.visit(comment);\n }\n return;\n }\n this.charset = true;\n }\n\n return atRuleNode;\n },\n\n checkValidNodes: function(rules, isRoot) {\n if (!rules) {\n return;\n }\n\n for (let i = 0; i < rules.length; i++) {\n const ruleNode = rules[i];\n if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) {\n throw { message: 'Properties must be inside selector blocks. They cannot be in the root',\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode instanceof tree.Call) {\n throw { message: `Function '${ruleNode.name}' is undefined`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode.type && !ruleNode.allowRoot) {\n throw { message: `${ruleNode.type} node returned by a function is not valid here`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n }\n },\n\n visitRuleset: function (rulesetNode, visitArgs) {\n // at this point rulesets are nested into each other\n let rule;\n\n const rulesets = [];\n\n this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot);\n\n if (!rulesetNode.root) {\n // remove invisible paths\n this._compileRulesetPaths(rulesetNode);\n\n // remove rulesets from this ruleset body and compile them separately\n const nodeRules = rulesetNode.rules;\n\n let nodeRuleCnt = nodeRules ? nodeRules.length : 0;\n for (let i = 0; i < nodeRuleCnt; ) {\n rule = nodeRules[i];\n if (rule && rule.rules) {\n // visit because we are moving them out from being a child\n rulesets.push(this._visitor.visit(rule));\n nodeRules.splice(i, 1);\n nodeRuleCnt--;\n continue;\n }\n i++;\n }\n // accept the visitor to remove rules and refactor itself\n // then we can decide nogw whether we want it or not\n // compile body\n if (nodeRuleCnt > 0) {\n rulesetNode.accept(this._visitor);\n } else {\n rulesetNode.rules = null;\n }\n visitArgs.visitDeeper = false;\n } else { // if (! rulesetNode.root) {\n rulesetNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n }\n\n if (rulesetNode.rules) {\n this._mergeRules(rulesetNode.rules);\n this._removeDuplicateRules(rulesetNode.rules);\n }\n\n // now decide whether we keep the ruleset\n if (this.utils.isVisibleRuleset(rulesetNode)) {\n rulesetNode.ensureVisibility();\n rulesets.splice(0, 0, rulesetNode);\n }\n\n if (rulesets.length === 1) {\n return rulesets[0];\n }\n return rulesets;\n },\n\n _compileRulesetPaths: function(rulesetNode) {\n if (rulesetNode.paths) {\n rulesetNode.paths = rulesetNode.paths\n .filter(p => {\n let i;\n if (p[0].elements[0].combinator.value === ' ') {\n p[0].elements[0].combinator = new(tree.Combinator)('');\n }\n for (i = 0; i < p.length; i++) {\n if (p[i].isVisible() && p[i].getIsOutput()) {\n return true;\n }\n }\n return false;\n });\n }\n },\n\n _removeDuplicateRules: function(rules) {\n if (!rules) { return; }\n\n // remove duplicates\n const ruleCache = {};\n\n let ruleList;\n let rule;\n let i;\n\n for (i = rules.length - 1; i >= 0 ; i--) {\n rule = rules[i];\n if (rule instanceof tree.Declaration) {\n if (!ruleCache[rule.name]) {\n ruleCache[rule.name] = rule;\n } else {\n ruleList = ruleCache[rule.name];\n if (ruleList instanceof tree.Declaration) {\n ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)];\n }\n const ruleCSS = rule.toCSS(this._context);\n if (ruleList.indexOf(ruleCSS) !== -1) {\n rules.splice(i, 1);\n } else {\n ruleList.push(ruleCSS);\n }\n }\n }\n }\n },\n\n _mergeRules: function(rules) {\n if (!rules) {\n return; \n }\n\n const groups = {};\n const groupsArr = [];\n\n for (let i = 0; i < rules.length; i++) {\n const rule = rules[i];\n if (rule.merge) {\n const key = rule.name;\n groups[key] ? rules.splice(i--, 1) : \n groupsArr.push(groups[key] = []);\n groups[key].push(rule);\n }\n }\n\n groupsArr.forEach(group => {\n if (group.length > 0) {\n const result = group[0];\n let space = [];\n const comma = [new tree.Expression(space)];\n group.forEach(rule => {\n if ((rule.merge === '+') && (space.length > 0)) {\n comma.push(new tree.Expression(space = []));\n }\n space.push(rule.value);\n result.important = result.important || rule.important;\n });\n result.value = new tree.Value(comma);\n }\n });\n }\n};\n\nexport default ToCSSVisitor;\n","import Visitor from './visitor';\nimport ImportVisitor from './import-visitor';\nimport MarkVisibleSelectorsVisitor from './set-tree-visibility-visitor';\nimport ExtendVisitor from './extend-visitor';\nimport JoinSelectorVisitor from './join-selector-visitor';\nimport ToCSSVisitor from './to-css-visitor';\n\nexport default {\n Visitor,\n ImportVisitor,\n MarkVisibleSelectorsVisitor,\n ExtendVisitor,\n JoinSelectorVisitor,\n ToCSSVisitor\n};\n","import chunker from './chunker';\n\nexport default () => {\n let // Less input string\n input;\n\n let // current chunk\n j;\n\n const // holds state for backtracking\n saveStack = [];\n\n let // furthest index the parser has gone to\n furthest;\n\n let // if this is furthest we got to, this is the probably cause\n furthestPossibleErrorMessage;\n\n let // chunkified input\n chunks;\n\n let // current chunk\n current;\n\n let // index of current chunk, in `input`\n currentPos;\n\n const parserInput = {};\n const CHARCODE_SPACE = 32;\n const CHARCODE_TAB = 9;\n const CHARCODE_LF = 10;\n const CHARCODE_CR = 13;\n const CHARCODE_PLUS = 43;\n const CHARCODE_COMMA = 44;\n const CHARCODE_FORWARD_SLASH = 47;\n const CHARCODE_9 = 57;\n\n function skipWhitespace(length) {\n const oldi = parserInput.i;\n const oldj = j;\n const curr = parserInput.i - currentPos;\n const endIndex = parserInput.i + current.length - curr;\n const mem = (parserInput.i += length);\n const inp = input;\n let c;\n let nextChar;\n let comment;\n\n for (; parserInput.i < endIndex; parserInput.i++) {\n c = inp.charCodeAt(parserInput.i);\n\n if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) {\n nextChar = inp.charAt(parserInput.i + 1);\n if (nextChar === '/') {\n comment = {index: parserInput.i, isLineComment: true};\n let nextNewLine = inp.indexOf('\\n', parserInput.i + 2);\n if (nextNewLine < 0) {\n nextNewLine = endIndex;\n }\n parserInput.i = nextNewLine;\n comment.text = inp.substr(comment.index, parserInput.i - comment.index);\n parserInput.commentStore.push(comment);\n continue;\n } else if (nextChar === '*') {\n const nextStarSlash = inp.indexOf('*/', parserInput.i + 2);\n if (nextStarSlash >= 0) {\n comment = {\n index: parserInput.i,\n text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i),\n isLineComment: false\n };\n parserInput.i += comment.text.length - 1;\n parserInput.commentStore.push(comment);\n continue;\n }\n }\n break;\n }\n\n if ((c !== CHARCODE_SPACE) && (c !== CHARCODE_LF) && (c !== CHARCODE_TAB) && (c !== CHARCODE_CR)) {\n break;\n }\n }\n\n current = current.slice(length + parserInput.i - mem + curr);\n currentPos = parserInput.i;\n\n if (!current.length) {\n if (j < chunks.length - 1) {\n current = chunks[++j];\n skipWhitespace(0); // skip space at the beginning of a chunk\n return true; // things changed\n }\n parserInput.finished = true;\n }\n\n return oldi !== parserInput.i || oldj !== j;\n }\n\n parserInput.save = () => {\n currentPos = parserInput.i;\n saveStack.push( { current, i: parserInput.i, j });\n };\n parserInput.restore = possibleErrorMessage => {\n\n if (parserInput.i > furthest || (parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage)) {\n furthest = parserInput.i;\n furthestPossibleErrorMessage = possibleErrorMessage;\n }\n const state = saveStack.pop();\n current = state.current;\n currentPos = parserInput.i = state.i;\n j = state.j;\n };\n parserInput.forget = () => {\n saveStack.pop();\n };\n parserInput.isWhitespace = offset => {\n const pos = parserInput.i + (offset || 0);\n const code = input.charCodeAt(pos);\n return (code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF);\n };\n\n // Specialization of $(tok)\n parserInput.$re = tok => {\n if (parserInput.i > currentPos) {\n current = current.slice(parserInput.i - currentPos);\n currentPos = parserInput.i;\n }\n\n const m = tok.exec(current);\n if (!m) {\n return null;\n }\n\n skipWhitespace(m[0].length);\n if (typeof m === 'string') {\n return m;\n }\n\n return m.length === 1 ? m[0] : m;\n };\n\n parserInput.$char = tok => {\n if (input.charAt(parserInput.i) !== tok) {\n return null;\n }\n skipWhitespace(1);\n return tok;\n };\n\n parserInput.$str = tok => {\n const tokLength = tok.length;\n\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tokLength; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return null;\n }\n }\n\n skipWhitespace(tokLength);\n return tok;\n };\n\n parserInput.$quoted = loc => {\n const pos = loc || parserInput.i;\n const startChar = input.charAt(pos);\n\n if (startChar !== '\\'' && startChar !== '\"') {\n return;\n }\n const length = input.length;\n const currentPosition = pos;\n\n for (let i = 1; i + currentPosition < length; i++) {\n const nextChar = input.charAt(i + currentPosition);\n switch (nextChar) {\n case '\\\\':\n i++;\n continue;\n case '\\r':\n case '\\n':\n break;\n case startChar:\n const str = input.substr(currentPosition, i + 1);\n if (!loc && loc !== 0) {\n skipWhitespace(i + 1);\n return str\n }\n return [startChar, str];\n default:\n }\n }\n return null;\n };\n\n /**\n * Permissive parsing. Ignores everything except matching {} [] () and quotes\n * until matching token (outside of blocks)\n */\n parserInput.$parseUntil = tok => {\n let quote = '';\n let returnVal = null;\n let inComment = false;\n let blockDepth = 0;\n const blockStack = [];\n const parseGroups = [];\n const length = input.length;\n const startPos = parserInput.i;\n let lastPos = parserInput.i;\n let i = parserInput.i;\n let loop = true;\n let testChar;\n\n if (typeof tok === 'string') {\n testChar = char => char === tok\n } else {\n testChar = char => tok.test(char)\n }\n\n do {\n let prevChar;\n let nextChar = input.charAt(i);\n if (blockDepth === 0 && testChar(nextChar)) {\n returnVal = input.substr(lastPos, i - lastPos);\n if (returnVal) {\n parseGroups.push(returnVal);\n }\n else {\n parseGroups.push(' ');\n }\n returnVal = parseGroups;\n skipWhitespace(i - startPos);\n loop = false\n } else {\n if (inComment) {\n if (nextChar === '*' && \n input.charAt(i + 1) === '/') {\n i++;\n blockDepth--;\n inComment = false;\n }\n i++;\n continue;\n }\n switch (nextChar) {\n case '\\\\':\n i++;\n nextChar = input.charAt(i);\n parseGroups.push(input.substr(lastPos, i - lastPos + 1));\n lastPos = i + 1;\n break;\n case '/':\n if (input.charAt(i + 1) === '*') {\n i++;\n inComment = true;\n blockDepth++;\n }\n break;\n case '\\'':\n case '\"':\n quote = parserInput.$quoted(i);\n if (quote) {\n parseGroups.push(input.substr(lastPos, i - lastPos), quote);\n i += quote[1].length - 1;\n lastPos = i + 1;\n }\n else {\n skipWhitespace(i - startPos);\n returnVal = nextChar;\n loop = false;\n }\n break;\n case '{':\n blockStack.push('}');\n blockDepth++;\n break;\n case '(':\n blockStack.push(')');\n blockDepth++;\n break;\n case '[':\n blockStack.push(']');\n blockDepth++;\n break;\n case '}':\n case ')':\n case ']':\n const expected = blockStack.pop();\n if (nextChar === expected) {\n blockDepth--;\n } else {\n // move the parser to the error and return expected\n skipWhitespace(i - startPos);\n returnVal = expected;\n loop = false;\n }\n }\n i++;\n if (i > length) {\n loop = false;\n }\n }\n prevChar = nextChar;\n } while (loop);\n\n return returnVal ? returnVal : null;\n }\n\n parserInput.autoCommentAbsorb = true;\n parserInput.commentStore = [];\n parserInput.finished = false;\n\n // Same as $(), but don't change the state of the parser,\n // just return the match.\n parserInput.peek = tok => {\n if (typeof tok === 'string') {\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tok.length; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return false;\n }\n }\n return true;\n } else {\n return tok.test(current);\n }\n };\n\n // Specialization of peek()\n // TODO remove or change some currentChar calls to peekChar\n parserInput.peekChar = tok => input.charAt(parserInput.i) === tok;\n\n parserInput.currentChar = () => input.charAt(parserInput.i);\n\n parserInput.prevChar = () => input.charAt(parserInput.i - 1);\n\n parserInput.getInput = () => input;\n\n parserInput.peekNotNumeric = () => {\n const c = input.charCodeAt(parserInput.i);\n // Is the first char of the dimension 0-9, '.', '+' or '-'\n return (c > CHARCODE_9 || c < CHARCODE_PLUS) || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA;\n };\n\n parserInput.start = (str, chunkInput, failFunction) => {\n input = str;\n parserInput.i = j = currentPos = furthest = 0;\n\n // chunking apparently makes things quicker (but my tests indicate\n // it might actually make things slower in node at least)\n // and it is a non-perfect parse - it can't recognise\n // unquoted urls, meaning it can't distinguish comments\n // meaning comments with quotes or {}() in them get 'counted'\n // and then lead to parse errors.\n // In addition if the chunking chunks in the wrong place we might\n // not be able to parse a parser statement in one go\n // this is officially deprecated but can be switched on via an option\n // in the case it causes too much performance issues.\n if (chunkInput) {\n chunks = chunker(str, failFunction);\n } else {\n chunks = [str];\n }\n\n current = chunks[0];\n\n skipWhitespace(0);\n };\n\n parserInput.end = () => {\n let message;\n const isFinished = parserInput.i >= input.length;\n\n if (parserInput.i < furthest) {\n message = furthestPossibleErrorMessage;\n parserInput.i = furthest;\n }\n return {\n isFinished,\n furthest: parserInput.i,\n furthestPossibleErrorMessage: message,\n furthestReachedEnd: parserInput.i >= input.length - 1,\n furthestChar: input[parserInput.i]\n };\n };\n\n return parserInput;\n};\n","// Split the input into chunks.\nexport default (input, fail) => {\n const len = input.length;\n let level = 0;\n let parenLevel = 0;\n let lastOpening;\n let lastOpeningParen;\n let lastMultiComment;\n let lastMultiCommentEndBrace;\n const chunks = [];\n let emitFrom = 0;\n let chunkerCurrentIndex;\n let currentChunkStartIndex;\n let cc;\n let cc2;\n let matched;\n\n function emitChunk(force) {\n const len = chunkerCurrentIndex - emitFrom;\n if (((len < 512) && !force) || !len) {\n return;\n }\n chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1));\n emitFrom = chunkerCurrentIndex + 1;\n }\n\n for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc = input.charCodeAt(chunkerCurrentIndex);\n if (((cc >= 97) && (cc <= 122)) || (cc < 34)) {\n // a-z or whitespace\n continue;\n }\n\n switch (cc) {\n case 40: // (\n parenLevel++;\n lastOpeningParen = chunkerCurrentIndex;\n continue;\n case 41: // )\n if (--parenLevel < 0) {\n return fail('missing opening `(`', chunkerCurrentIndex);\n }\n continue;\n case 59: // ;\n if (!parenLevel) { emitChunk(); }\n continue;\n case 123: // {\n level++;\n lastOpening = chunkerCurrentIndex;\n continue;\n case 125: // }\n if (--level < 0) {\n return fail('missing opening `{`', chunkerCurrentIndex);\n }\n if (!level && !parenLevel) { emitChunk(); }\n continue;\n case 92: // \\\n if (chunkerCurrentIndex < len - 1) { chunkerCurrentIndex++; continue; }\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n case 34:\n case 39:\n case 96: // \", ' and `\n matched = 0;\n currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 > 96) { continue; }\n if (cc2 == cc) { matched = 1; break; }\n if (cc2 == 92) { // \\\n if (chunkerCurrentIndex == len - 1) {\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n }\n chunkerCurrentIndex++;\n }\n }\n if (matched) { continue; }\n return fail(`unmatched \\`${String.fromCharCode(cc)}\\``, currentChunkStartIndex);\n case 47: // /, check for comment\n if (parenLevel || (chunkerCurrentIndex == len - 1)) { continue; }\n cc2 = input.charCodeAt(chunkerCurrentIndex + 1);\n if (cc2 == 47) {\n // //, find lnfeed\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if ((cc2 <= 13) && ((cc2 == 10) || (cc2 == 13))) { break; }\n }\n } else if (cc2 == 42) {\n // /*, find */\n lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 == 125) { lastMultiCommentEndBrace = chunkerCurrentIndex; }\n if (cc2 != 42) { continue; }\n if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { break; }\n }\n if (chunkerCurrentIndex == len - 1) {\n return fail('missing closing `*/`', currentChunkStartIndex);\n }\n chunkerCurrentIndex++;\n }\n continue;\n case 42: // *, check for unmatched */\n if ((chunkerCurrentIndex < len - 1) && (input.charCodeAt(chunkerCurrentIndex + 1) == 47)) {\n return fail('unmatched `/*`', chunkerCurrentIndex);\n }\n continue;\n }\n }\n\n if (level !== 0) {\n if ((lastMultiComment > lastOpening) && (lastMultiCommentEndBrace > lastMultiComment)) {\n return fail('missing closing `}` or `*/`', lastOpening);\n } else {\n return fail('missing closing `}`', lastOpening);\n }\n } else if (parenLevel !== 0) {\n return fail('missing closing `)`', lastOpeningParen);\n }\n\n emitChunk(true);\n return chunks;\n};\n","import LessError from '../less-error';\nimport tree from '../tree';\nimport visitors from '../visitors';\nimport getParserInput from './parser-input';\nimport * as utils from '../utils';\nimport functionRegistry from '../functions/function-registry';\n\n//\n// less.js - parser\n//\n// A relatively straight-forward predictive parser.\n// There is no tokenization/lexing stage, the input is parsed\n// in one sweep.\n//\n// To make the parser fast enough to run in the browser, several\n// optimization had to be made:\n//\n// - Matching and slicing on a huge input is often cause of slowdowns.\n// The solution is to chunkify the input into smaller strings.\n// The chunks are stored in the `chunks` var,\n// `j` holds the current chunk index, and `currentPos` holds\n// the index of the current chunk in relation to `input`.\n// This gives us an almost 4x speed-up.\n//\n// - In many cases, we don't need to match individual tokens;\n// for example, if a value doesn't hold any variables, operations\n// or dynamic references, the parser can effectively 'skip' it,\n// treating it as a literal.\n// An example would be '1px solid #000' - which evaluates to itself,\n// we don't need to know what the individual components are.\n// The drawback, of course is that you don't get the benefits of\n// syntax-checking on the CSS. This gives us a 50% speed-up in the parser,\n// and a smaller speed-up in the code-gen.\n//\n//\n// Token matching is done with the `$` function, which either takes\n// a terminal string or regexp, or a non-terminal function to call.\n// It also takes care of moving all the indices forwards.\n//\n\nconst Parser = function Parser(context, imports, fileInfo) {\n let parsers;\n const parserInput = getParserInput();\n\n function error(msg, type) {\n throw new LessError(\n {\n index: parserInput.i,\n filename: fileInfo.filename,\n type: type || 'Syntax',\n message: msg\n },\n imports\n );\n }\n\n function expect(arg, msg) {\n // some older browsers return typeof 'function' for RegExp\n const result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg);\n if (result) {\n return result;\n }\n \n error(msg || (typeof arg === 'string'\n ? `expected '${arg}' got '${parserInput.currentChar()}'`\n : 'unexpected token'));\n }\n\n // Specialization of expect()\n function expectChar(arg, msg) {\n if (parserInput.$char(arg)) {\n return arg;\n }\n error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`);\n }\n\n function getDebugInfo(index) {\n const filename = fileInfo.filename;\n\n return {\n lineNumber: utils.getLocation(index, parserInput.getInput()).line + 1,\n fileName: filename\n };\n }\n\n /**\n * Used after initial parsing to create nodes on the fly\n * \n * @param {String} str - string to parse \n * @param {Array} parseList - array of parsers to run input through e.g. [\"value\", \"important\"]\n * @param {Number} currentIndex - start number to begin indexing\n * @param {Object} fileInfo - fileInfo to attach to created nodes\n */\n function parseNode(str, parseList, currentIndex, fileInfo, callback) {\n let result;\n const returnNodes = [];\n const parser = parserInput;\n\n try {\n parser.start(str, false, function fail(msg, index) {\n callback({\n message: msg,\n index: index + currentIndex\n });\n });\n for (let x = 0, p, i; (p = parseList[x]); x++) {\n i = parser.i;\n result = parsers[p]();\n if (result) {\n result._index = i + currentIndex;\n result._fileInfo = fileInfo;\n returnNodes.push(result);\n }\n else {\n returnNodes.push(null);\n }\n }\n\n const endInfo = parser.end();\n if (endInfo.isFinished) {\n callback(null, returnNodes);\n }\n else {\n callback(true, null);\n }\n } catch (e) {\n throw new LessError({\n index: e.index + currentIndex,\n message: e.message\n }, imports, fileInfo.filename);\n }\n }\n\n //\n // The Parser\n //\n return {\n parserInput,\n imports,\n fileInfo,\n parseNode,\n //\n // Parse an input string into an abstract syntax tree,\n // @param str A string containing 'less' markup\n // @param callback call `callback` when done.\n // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply\n //\n parse: function (str, callback, additionalData) {\n let root;\n let error = null;\n let globalVars;\n let modifyVars;\n let ignored;\n let preText = '';\n\n globalVars = (additionalData && additionalData.globalVars) ? `${Parser.serializeVars(additionalData.globalVars)}\\n` : '';\n modifyVars = (additionalData && additionalData.modifyVars) ? `\\n${Parser.serializeVars(additionalData.modifyVars)}` : '';\n\n if (context.pluginManager) {\n const preProcessors = context.pluginManager.getPreProcessors();\n for (let i = 0; i < preProcessors.length; i++) {\n str = preProcessors[i].process(str, { context, imports, fileInfo });\n }\n }\n\n if (globalVars || (additionalData && additionalData.banner)) {\n preText = ((additionalData && additionalData.banner) ? additionalData.banner : '') + globalVars;\n ignored = imports.contentsIgnoredChars;\n ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0;\n ignored[fileInfo.filename] += preText.length;\n }\n\n str = str.replace(/\\r\\n?/g, '\\n');\n // Remove potential UTF Byte Order Mark\n str = preText + str.replace(/^\\uFEFF/, '') + modifyVars;\n imports.contents[fileInfo.filename] = str;\n\n // Start with the primary rule.\n // The whole syntax tree is held under a Ruleset node,\n // with the `root` property set to true, so no `{}` are\n // output. The callback is called when the input is parsed.\n try {\n parserInput.start(str, context.chunkInput, function fail(msg, index) {\n throw new LessError({\n index,\n type: 'Parse',\n message: msg,\n filename: fileInfo.filename\n }, imports);\n });\n\n tree.Node.prototype.parse = this;\n root = new tree.Ruleset(null, this.parsers.primary());\n tree.Node.prototype.rootNode = root;\n root.root = true;\n root.firstRoot = true;\n root.functionRegistry = functionRegistry.inherit();\n \n } catch (e) {\n return callback(new LessError(e, imports, fileInfo.filename));\n }\n\n // If `i` is smaller than the `input.length - 1`,\n // it means the parser wasn't able to parse the whole\n // string, so we've got a parsing error.\n //\n // We try to extract a \\n delimited string,\n // showing the line where the parse error occurred.\n // We split it up into two parts (the part which parsed,\n // and the part which didn't), so we can color them differently.\n const endInfo = parserInput.end();\n if (!endInfo.isFinished) {\n\n let message = endInfo.furthestPossibleErrorMessage;\n\n if (!message) {\n message = 'Unrecognised input';\n if (endInfo.furthestChar === '}') {\n message += '. Possibly missing opening \\'{\\'';\n } else if (endInfo.furthestChar === ')') {\n message += '. Possibly missing opening \\'(\\'';\n } else if (endInfo.furthestReachedEnd) {\n message += '. Possibly missing something';\n }\n }\n\n error = new LessError({\n type: 'Parse',\n message,\n index: endInfo.furthest,\n filename: fileInfo.filename\n }, imports);\n }\n\n const finish = e => {\n e = error || e || imports.error;\n\n if (e) {\n if (!(e instanceof LessError)) {\n e = new LessError(e, imports, fileInfo.filename);\n }\n\n return callback(e);\n }\n else {\n return callback(null, root);\n }\n };\n\n if (context.processImports !== false) {\n new visitors.ImportVisitor(imports, finish)\n .run(root);\n } else {\n return finish();\n }\n },\n\n //\n // Here in, the parsing rules/functions\n //\n // The basic structure of the syntax tree generated is as follows:\n //\n // Ruleset -> Declaration -> Value -> Expression -> Entity\n //\n // Here's some Less code:\n //\n // .class {\n // color: #fff;\n // border: 1px solid #000;\n // width: @w + 4px;\n // > .child {...}\n // }\n //\n // And here's what the parse tree might look like:\n //\n // Ruleset (Selector '.class', [\n // Declaration (\"color\", Value ([Expression [Color #fff]]))\n // Declaration (\"border\", Value ([Expression [Dimension 1px][Keyword \"solid\"][Color #000]]))\n // Declaration (\"width\", Value ([Expression [Operation \" + \" [Variable \"@w\"][Dimension 4px]]]))\n // Ruleset (Selector [Element '>', '.child'], [...])\n // ])\n //\n // In general, most rules will try to parse a token with the `$re()` function, and if the return\n // value is truly, will return a new node, of the relevant type. Sometimes, we need to check\n // first, before parsing, that's when we use `peek()`.\n //\n parsers: parsers = {\n //\n // The `primary` rule is the *entry* and *exit* point of the parser.\n // The rules here can appear at any level of the parse tree.\n //\n // The recursive nature of the grammar is an interplay between the `block`\n // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,\n // as represented by this simplified grammar:\n //\n // primary → (ruleset | declaration)+\n // ruleset → selector+ block\n // block → '{' primary '}'\n //\n // Only at one point is the primary rule not called from the\n // block rule: at the root level.\n //\n primary: function () {\n const mixin = this.mixin;\n let root = [];\n let node;\n\n while (true) {\n while (true) {\n node = this.comment();\n if (!node) { break; }\n root.push(node);\n }\n // always process comments before deciding if finished\n if (parserInput.finished) {\n break;\n }\n if (parserInput.peek('}')) {\n break;\n }\n\n node = this.extendRule();\n if (node) {\n root = root.concat(node);\n continue;\n }\n\n node = mixin.definition() || this.declaration() || this.ruleset() ||\n mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule();\n if (node) {\n root.push(node);\n } else {\n let foundSemiColon = false;\n while (parserInput.$char(';')) {\n foundSemiColon = true;\n }\n if (!foundSemiColon) {\n break;\n }\n }\n }\n\n return root;\n },\n\n // comments are collected by the main parsing mechanism and then assigned to nodes\n // where the current structure allows it\n comment: function () {\n if (parserInput.commentStore.length) {\n const comment = parserInput.commentStore.shift();\n return new(tree.Comment)(comment.text, comment.isLineComment, comment.index, fileInfo);\n }\n },\n\n //\n // Entities are tokens which can be found inside an Expression\n //\n entities: {\n mixinLookup: function() {\n return parsers.mixin.call(true, true);\n },\n //\n // A string, which supports escaping \" and '\n //\n // \"milky way\" 'he\\'s the one!'\n //\n quoted: function (forceEscaped) {\n let str;\n const index = parserInput.i;\n let isEscaped = false;\n\n parserInput.save();\n if (parserInput.$char('~')) {\n isEscaped = true;\n } else if (forceEscaped) {\n parserInput.restore();\n return;\n }\n\n str = parserInput.$quoted();\n if (!str) {\n parserInput.restore();\n return;\n }\n parserInput.forget();\n\n return new(tree.Quoted)(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo);\n },\n\n //\n // A catch-all word, such as:\n //\n // black border-collapse\n //\n keyword: function () {\n const k = parserInput.$char('%') || parserInput.$re(/^\\[?(?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\\]?/);\n if (k) {\n return tree.Color.fromKeyword(k) || new(tree.Keyword)(k);\n }\n },\n\n //\n // A function call\n //\n // rgb(255, 0, 255)\n //\n // The arguments are parsed with the `entities.arguments` parser.\n //\n call: function () {\n let name;\n let args;\n let func;\n const index = parserInput.i;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (parserInput.peek(/^url\\(/i)) {\n return;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^([\\w-]+|%|progid:[\\w\\.]+)\\(/);\n if (!name) {\n parserInput.forget(); \n return;\n }\n\n name = name[1];\n func = this.customFuncCall(name);\n if (func) {\n args = func.parse();\n if (args && func.stop) {\n parserInput.forget();\n return args;\n }\n }\n\n args = this.arguments(args);\n\n if (!parserInput.$char(')')) {\n parserInput.restore('Could not parse call arguments or missing \\')\\'');\n return;\n }\n\n parserInput.forget();\n\n return new(tree.Call)(name, args, index, fileInfo);\n },\n \n //\n // Parsing rules for functions with non-standard args, e.g.:\n //\n // boolean(not(2 > 1))\n //\n // This is a quick prototype, to be modified/improved when\n // more custom-parsed funcs come (e.g. `selector(...)`)\n //\n\n customFuncCall: function (name) {\n /* Ideally the table is to be moved out of here for faster perf.,\n but it's quite tricky since it relies on all these `parsers`\n and `expect` available only here */\n return {\n alpha: f(parsers.ieAlpha, true),\n boolean: f(condition),\n 'if': f(condition)\n }[name.toLowerCase()];\n\n function f(parse, stop) {\n return {\n parse, // parsing function\n stop // when true - stop after parse() and return its result, \n // otherwise continue for plain args\n };\n }\n \n function condition() {\n return [expect(parsers.condition, 'expected condition')];\n }\n },\n\n arguments: function (prevArgs) {\n let argsComma = prevArgs || [];\n const argsSemiColon = [];\n let isSemiColonSeparated;\n let value;\n\n parserInput.save();\n\n while (true) {\n if (prevArgs) {\n prevArgs = false;\n } else {\n value = parsers.detachedRuleset() || this.assignment() || parsers.expression();\n if (!value) {\n break;\n }\n\n if (value.value && value.value.length == 1) {\n value = value.value[0];\n }\n\n argsComma.push(value);\n }\n\n if (parserInput.$char(',')) {\n continue;\n }\n\n if (parserInput.$char(';') || isSemiColonSeparated) {\n isSemiColonSeparated = true;\n value = (argsComma.length < 1) ? argsComma[0]\n : new tree.Value(argsComma);\n argsSemiColon.push(value);\n argsComma = [];\n }\n }\n\n parserInput.forget();\n return isSemiColonSeparated ? argsSemiColon : argsComma;\n },\n literal: function () {\n return this.dimension() ||\n this.color() ||\n this.quoted() ||\n this.unicodeDescriptor();\n },\n\n // Assignments are argument entities for calls.\n // They are present in ie filter properties as shown below.\n //\n // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )\n //\n\n assignment: function () {\n let key;\n let value;\n parserInput.save();\n key = parserInput.$re(/^\\w+(?=\\s?=)/i);\n if (!key) {\n parserInput.restore();\n return;\n }\n if (!parserInput.$char('=')) {\n parserInput.restore();\n return;\n }\n value = parsers.entity();\n if (value) {\n parserInput.forget();\n return new(tree.Assignment)(key, value);\n } else {\n parserInput.restore();\n }\n },\n\n //\n // Parse url() tokens\n //\n // We use a specific rule for urls, because they don't really behave like\n // standard function calls. The difference is that the argument doesn't have\n // to be enclosed within a string, so it can't be parsed as an Expression.\n //\n url: function () {\n let value;\n const index = parserInput.i;\n\n parserInput.autoCommentAbsorb = false;\n\n if (!parserInput.$str('url(')) {\n parserInput.autoCommentAbsorb = true;\n return;\n }\n\n value = this.quoted() || this.variable() || this.property() ||\n parserInput.$re(/^(?:(?:\\\\[\\(\\)'\"])|[^\\(\\)'\"])+/) || '';\n\n parserInput.autoCommentAbsorb = true;\n\n expectChar(')');\n\n return new(tree.URL)((value.value != null || \n value instanceof tree.Variable || \n value instanceof tree.Property) ?\n value : new(tree.Anonymous)(value, index), index, fileInfo);\n },\n\n //\n // A Variable entity, such as `@fink`, in\n //\n // width: @fink + 2px\n //\n // We use a different parser for variable definitions,\n // see `parsers.variable`.\n //\n variable: function () {\n let ch;\n let name;\n const index = parserInput.i;\n\n parserInput.save();\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\\w-]+/))) {\n ch = parserInput.currentChar();\n if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\\s/)) {\n // this may be a VariableCall lookup\n const result = parsers.variableCall(name);\n if (result) {\n parserInput.forget();\n return result;\n }\n }\n parserInput.forget();\n return new(tree.Variable)(name, index, fileInfo);\n }\n parserInput.restore();\n },\n\n // A variable entity using the protective {} e.g. @{var}\n variableCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\\{([\\w-]+)\\}/))) {\n return new(tree.Variable)(`@${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Property accessor, such as `$color`, in\n //\n // background-color: $color\n //\n property: function () {\n let name;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\\$[\\w-]+/))) {\n return new(tree.Property)(name, index, fileInfo);\n }\n },\n\n // A property entity useing the protective {} e.g. ${prop}\n propertyCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\\$\\{([\\w-]+)\\}/))) {\n return new(tree.Property)(`$${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Hexadecimal color\n //\n // #4F3C2F\n //\n // `rgb` and `hsl` colors are parsed through the `entities.call` parser.\n //\n color: function () {\n let rgb;\n parserInput.save();\n\n if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\\w.#\\[])?/))) {\n if (!rgb[2]) {\n parserInput.forget();\n return new(tree.Color)(rgb[1], undefined, rgb[0]);\n } \n }\n parserInput.restore();\n },\n\n colorKeyword: function () {\n parserInput.save();\n const autoCommentAbsorb = parserInput.autoCommentAbsorb;\n parserInput.autoCommentAbsorb = false;\n const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/);\n parserInput.autoCommentAbsorb = autoCommentAbsorb;\n if (!k) {\n parserInput.forget();\n return;\n }\n parserInput.restore();\n const color = tree.Color.fromKeyword(k);\n if (color) {\n parserInput.$str(k);\n return color;\n }\n },\n\n //\n // A Dimension, that is, a number and a unit\n //\n // 0.5em 95%\n //\n dimension: function () {\n if (parserInput.peekNotNumeric()) {\n return;\n }\n\n const value = parserInput.$re(/^([+-]?\\d*\\.?\\d+)(%|[a-z_]+)?/i);\n if (value) {\n return new(tree.Dimension)(value[1], value[2]);\n }\n },\n\n //\n // A unicode descriptor, as is used in unicode-range\n //\n // U+0?? or U+00A1-00A9\n //\n unicodeDescriptor: function () {\n let ud;\n\n ud = parserInput.$re(/^U\\+[0-9a-fA-F?]+(\\-[0-9a-fA-F?]+)?/);\n if (ud) {\n return new(tree.UnicodeDescriptor)(ud[0]);\n }\n },\n\n //\n // JavaScript code to be evaluated\n //\n // `window.location.href`\n //\n javascript: function () {\n let js;\n const index = parserInput.i;\n\n parserInput.save();\n\n const escape = parserInput.$char('~');\n const jsQuote = parserInput.$char('`');\n\n if (!jsQuote) {\n parserInput.restore();\n return;\n }\n\n js = parserInput.$re(/^[^`]*`/);\n if (js) {\n parserInput.forget();\n return new(tree.JavaScript)(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo);\n }\n parserInput.restore('invalid javascript definition');\n }\n },\n\n //\n // The variable part of a variable definition. Used in the `rule` parser\n //\n // @fink:\n //\n variable: function () {\n let name;\n\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\\w-]+)\\s*:/))) { return name[1]; }\n },\n\n //\n // Call a variable value to retrieve a detached ruleset\n // or a value from a detached ruleset's rules.\n //\n // @fink();\n // @fink;\n // color: @fink[@color];\n //\n variableCall: function (parsedName) {\n let lookups;\n let important;\n const i = parserInput.i;\n const inValue = !!parsedName;\n let name = parsedName;\n\n parserInput.save();\n\n if (name || (parserInput.currentChar() === '@'\n && (name = parserInput.$re(/^(@[\\w-]+)(\\(\\s*\\))?/)))) {\n\n lookups = this.mixin.ruleLookups();\n\n if (!lookups && ((inValue && parserInput.$str('()') !== '()') || (name[2] !== '()'))) {\n parserInput.restore('Missing \\'[...]\\' lookup in variable call');\n return;\n }\n\n if (!inValue) {\n name = name[1];\n }\n\n if (lookups && parsers.important()) {\n important = true;\n }\n\n const call = new tree.VariableCall(name, i, fileInfo);\n if (!inValue && parsers.end()) {\n parserInput.forget();\n return call;\n }\n else {\n parserInput.forget();\n return new tree.NamespaceValue(call, lookups, important, i, fileInfo);\n }\n }\n\n parserInput.restore();\n },\n\n //\n // extend syntax - used to extend selectors\n //\n extend: function(isRule) {\n let elements;\n let e;\n const index = parserInput.i;\n let option;\n let extendList;\n let extend;\n\n if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) {\n return;\n }\n\n do {\n option = null;\n elements = null;\n while (!(option = parserInput.$re(/^(all)(?=\\s*(\\)|,))/))) {\n e = this.element();\n if (!e) {\n break;\n }\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n }\n\n option = option && option[1];\n if (!elements) {\n error('Missing target selector for :extend().');\n }\n extend = new(tree.Extend)(new(tree.Selector)(elements), option, index, fileInfo);\n if (extendList) {\n extendList.push(extend);\n } else {\n extendList = [ extend ];\n }\n } while (parserInput.$char(','));\n\n expect(/^\\)/);\n\n if (isRule) {\n expect(/^;/);\n }\n\n return extendList;\n },\n\n //\n // extendRule - used in a rule to extend all the parent selectors\n //\n extendRule: function() {\n return this.extend(true);\n },\n\n //\n // Mixins\n //\n mixin: {\n //\n // A Mixin call, with an optional argument list\n //\n // #mixins > .square(#fff);\n // #mixins.square(#fff);\n // .rounded(4px, black);\n // .button;\n //\n // We can lookup / return a value using the lookup syntax:\n //\n // color: #mixin.square(#fff)[@color];\n //\n // The `while` loop is there because mixins can be\n // namespaced, but we only support the child and descendant\n // selector for now.\n //\n call: function (inValue, getLookup) {\n const s = parserInput.currentChar();\n let important = false;\n let lookups;\n const index = parserInput.i;\n let elements;\n let args;\n let hasParens;\n\n if (s !== '.' && s !== '#') { return; }\n\n parserInput.save(); // stop us absorbing part of an invalid selector\n\n elements = this.elements();\n\n if (elements) {\n if (parserInput.$char('(')) {\n args = this.args(true).args;\n expectChar(')');\n hasParens = true;\n }\n\n if (getLookup !== false) {\n lookups = this.ruleLookups();\n }\n if (getLookup === true && !lookups) {\n parserInput.restore();\n return;\n }\n\n if (inValue && !lookups && !hasParens) {\n // This isn't a valid in-value mixin call\n parserInput.restore();\n return;\n }\n\n if (!inValue && parsers.important()) {\n important = true;\n }\n\n if (inValue || parsers.end()) {\n parserInput.forget();\n const mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important);\n if (lookups) {\n return new tree.NamespaceValue(mixin, lookups, important);\n }\n else {\n return mixin;\n }\n }\n }\n\n parserInput.restore();\n },\n /**\n * Matching elements for mixins\n * (Start with . or # and can have > )\n */\n elements: function() {\n let elements;\n let e;\n let c;\n let elem;\n let elemIndex;\n const re = /^[#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/;\n while (true) {\n elemIndex = parserInput.i;\n e = parserInput.$re(re);\n \n if (!e) {\n break;\n }\n elem = new(tree.Element)(c, e, false, elemIndex, fileInfo);\n if (elements) {\n elements.push(elem);\n } else {\n elements = [ elem ];\n }\n c = parserInput.$char('>');\n }\n return elements;\n },\n args: function (isCall) {\n const entities = parsers.entities;\n const returner = { args:null, variadic: false };\n let expressions = [];\n const argsSemiColon = [];\n const argsComma = [];\n let isSemiColonSeparated;\n let expressionContainsNamed;\n let name;\n let nameLoop;\n let value;\n let arg;\n let expand;\n let hasSep = true;\n\n parserInput.save();\n\n while (true) {\n if (isCall) {\n arg = parsers.detachedRuleset() || parsers.expression();\n } else {\n parserInput.commentStore.length = 0;\n if (parserInput.$str('...')) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ variadic: true });\n break;\n }\n arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true);\n }\n\n if (!arg || !hasSep) {\n break;\n }\n\n nameLoop = null;\n if (arg.throwAwayComments) {\n arg.throwAwayComments();\n }\n value = arg;\n let val = null;\n\n if (isCall) {\n // Variable\n if (arg.value && arg.value.length == 1) {\n val = arg.value[0];\n }\n } else {\n val = arg;\n }\n\n if (val && (val instanceof tree.Variable || val instanceof tree.Property)) {\n if (parserInput.$char(':')) {\n if (expressions.length > 0) {\n if (isSemiColonSeparated) {\n error('Cannot mix ; and , as delimiter types');\n }\n expressionContainsNamed = true;\n }\n\n value = parsers.detachedRuleset() || parsers.expression();\n\n if (!value) {\n if (isCall) {\n error('could not understand value for named argument');\n } else {\n parserInput.restore();\n returner.args = [];\n return returner;\n }\n }\n nameLoop = (name = val.name);\n } else if (parserInput.$str('...')) {\n if (!isCall) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ name: arg.name, variadic: true });\n break;\n } else {\n expand = true;\n }\n } else if (!isCall) {\n name = nameLoop = val.name;\n value = null;\n }\n }\n\n if (value) {\n expressions.push(value);\n }\n\n argsComma.push({ name:nameLoop, value, expand });\n\n if (parserInput.$char(',')) {\n hasSep = true;\n continue;\n }\n hasSep = parserInput.$char(';') === ';';\n\n if (hasSep || isSemiColonSeparated) {\n\n if (expressionContainsNamed) {\n error('Cannot mix ; and , as delimiter types');\n }\n\n isSemiColonSeparated = true;\n\n if (expressions.length > 1) {\n value = new(tree.Value)(expressions);\n }\n argsSemiColon.push({ name, value, expand });\n\n name = null;\n expressions = [];\n expressionContainsNamed = false;\n }\n }\n\n parserInput.forget();\n returner.args = isSemiColonSeparated ? argsSemiColon : argsComma;\n return returner;\n },\n //\n // A Mixin definition, with a list of parameters\n //\n // .rounded (@radius: 2px, @color) {\n // ...\n // }\n //\n // Until we have a finer grained state-machine, we have to\n // do a look-ahead, to make sure we don't have a mixin call.\n // See the `rule` function for more information.\n //\n // We start by matching `.rounded (`, and then proceed on to\n // the argument list, which has optional default values.\n // We store the parameters in `params`, with a `value` key,\n // if there is a value, such as in the case of `@radius`.\n //\n // Once we've got our params list, and a closing `)`, we parse\n // the `{...}` block.\n //\n definition: function () {\n let name;\n let params = [];\n let match;\n let ruleset;\n let cond;\n let variadic = false;\n if ((parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#') ||\n parserInput.peek(/^[^{]*\\}/)) {\n return;\n }\n\n parserInput.save();\n\n match = parserInput.$re(/^([#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\\s*\\(/);\n if (match) {\n name = match[1];\n\n const argInfo = this.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n\n // .mixincall(\"@{a}\");\n // looks a bit like a mixin definition..\n // also\n // .mixincall(@a: {rule: set;});\n // so we have to be nice and restore\n if (!parserInput.$char(')')) {\n parserInput.restore('Missing closing \\')\\'');\n return;\n }\n\n parserInput.commentStore.length = 0;\n\n if (parserInput.$str('when')) { // Guard\n cond = expect(parsers.conditions, 'expected condition');\n }\n\n ruleset = parsers.block();\n\n if (ruleset) {\n parserInput.forget();\n return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);\n } else {\n parserInput.restore();\n }\n } else {\n parserInput.forget();\n }\n },\n \n ruleLookups: function() {\n let rule;\n let args;\n const lookups = [];\n\n if (parserInput.currentChar() !== '[') { \n return;\n }\n\n while (true) {\n parserInput.save();\n args = null;\n rule = this.lookupValue();\n if (!rule && rule !== '') {\n parserInput.restore();\n break;\n }\n lookups.push(rule);\n parserInput.forget();\n }\n if (lookups.length > 0) {\n return lookups;\n }\n },\n \n lookupValue: function() {\n parserInput.save();\n \n if (!parserInput.$char('[')) { \n parserInput.restore();\n return;\n }\n \n const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/);\n \n if (!parserInput.$char(']')) {\n parserInput.restore();\n return;\n } \n\n if (name || name === '') {\n parserInput.forget();\n return name;\n }\n \n parserInput.restore();\n }\n },\n //\n // Entities are the smallest recognized token,\n // and can be found inside a rule's value.\n //\n entity: function () {\n const entities = this.entities;\n\n return this.comment() || entities.literal() || entities.variable() || entities.url() ||\n entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) ||\n entities.javascript();\n },\n\n //\n // A Declaration terminator. Note that we use `peek()` to check for '}',\n // because the `block` rule will be expecting it, but we still need to make sure\n // it's there, if ';' was omitted.\n //\n end: function () {\n return parserInput.$char(';') || parserInput.peek('}');\n },\n\n //\n // IE's alpha function\n //\n // alpha(opacity=88)\n //\n ieAlpha: function () {\n let value;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (!parserInput.$re(/^opacity=/i)) { return; }\n value = parserInput.$re(/^\\d+/);\n if (!value) {\n value = expect(parsers.entities.variable, 'Could not parse alpha');\n value = `@{${value.name.slice(1)}}`;\n }\n expectChar(')');\n return new tree.Quoted('', `alpha(opacity=${value})`);\n },\n\n //\n // A Selector Element\n //\n // div\n // + h1\n // #socks\n // input[type=\"text\"]\n //\n // Elements are the building blocks for Selectors,\n // they are made out of a `Combinator` (see combinator rule),\n // and an element name, such as a tag a class, or `*`.\n //\n element: function () {\n let e;\n let c;\n let v;\n const index = parserInput.i;\n\n c = this.combinator();\n\n e = parserInput.$re(/^(?:\\d+\\.\\d+|\\d+)%/) ||\n parserInput.$re(/^(?:[.#]?|:*)(?:[\\w-]|[^\\x00-\\x9f]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||\n parserInput.$char('*') || parserInput.$char('&') || this.attribute() ||\n parserInput.$re(/^\\([^&()@]+\\)/) || parserInput.$re(/^[\\.#:](?=@)/) ||\n this.entities.variableCurly();\n\n if (!e) {\n parserInput.save();\n if (parserInput.$char('(')) {\n if ((v = this.selector(false)) && parserInput.$char(')')) {\n e = new(tree.Paren)(v);\n parserInput.forget();\n } else {\n parserInput.restore('Missing closing \\')\\'');\n }\n } else {\n parserInput.forget();\n }\n }\n\n if (e) { return new(tree.Element)(c, e, e instanceof tree.Variable, index, fileInfo); }\n },\n\n //\n // Combinators combine elements together, in a Selector.\n //\n // Because our parser isn't white-space sensitive, special care\n // has to be taken, when parsing the descendant combinator, ` `,\n // as it's an empty space. We have to check the previous character\n // in the input, to see if it's a ` ` character. More info on how\n // we deal with this in *combinator.js*.\n //\n combinator: function () {\n let c = parserInput.currentChar();\n\n if (c === '/') {\n parserInput.save();\n const slashedCombinator = parserInput.$re(/^\\/[a-z]+\\//i);\n if (slashedCombinator) {\n parserInput.forget();\n return new(tree.Combinator)(slashedCombinator);\n }\n parserInput.restore();\n }\n\n if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') {\n parserInput.i++;\n if (c === '^' && parserInput.currentChar() === '^') {\n c = '^^';\n parserInput.i++;\n }\n while (parserInput.isWhitespace()) { parserInput.i++; }\n return new(tree.Combinator)(c);\n } else if (parserInput.isWhitespace(-1)) {\n return new(tree.Combinator)(' ');\n } else {\n return new(tree.Combinator)(null);\n }\n },\n //\n // A CSS Selector\n // with less extensions e.g. the ability to extend and guard\n //\n // .class > div + h1\n // li a:hover\n //\n // Selectors are made out of one or more Elements, see above.\n //\n selector: function (isLess) {\n const index = parserInput.i;\n let elements;\n let extendList;\n let c;\n let e;\n let allExtends;\n let when;\n let condition;\n isLess = isLess !== false;\n while ((isLess && (extendList = this.extend())) || (isLess && (when = parserInput.$str('when'))) || (e = this.element())) {\n if (when) {\n condition = expect(this.conditions, 'expected condition');\n } else if (condition) {\n error('CSS guard can only be used at the end of selector');\n } else if (extendList) {\n if (allExtends) {\n allExtends = allExtends.concat(extendList);\n } else {\n allExtends = extendList;\n }\n } else {\n if (allExtends) { error('Extend can only be used at the end of selector'); }\n c = parserInput.currentChar();\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n e = null;\n }\n if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') {\n break;\n }\n }\n\n if (elements) { return new(tree.Selector)(elements, allExtends, condition, index, fileInfo); }\n if (allExtends) { error('Extend must be used to extend a selector, it cannot be used on its own'); }\n },\n selectors: function () {\n let s;\n let selectors;\n while (true) {\n s = this.selector();\n if (!s) {\n break;\n }\n if (selectors) {\n selectors.push(s);\n } else {\n selectors = [ s ];\n }\n parserInput.commentStore.length = 0;\n if (s.condition && selectors.length > 1) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n if (!parserInput.$char(',')) { break; }\n if (s.condition) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n parserInput.commentStore.length = 0;\n }\n return selectors;\n },\n attribute: function () {\n if (!parserInput.$char('[')) { return; }\n\n const entities = this.entities;\n let key;\n let val;\n let op;\n\n if (!(key = entities.variableCurly())) {\n key = expect(/^(?:[_A-Za-z0-9-\\*]*\\|)?(?:[_A-Za-z0-9-]|\\\\.)+/);\n }\n\n op = parserInput.$re(/^[|~*$^]?=/);\n if (op) {\n val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\\w-]+/) || entities.variableCurly();\n }\n\n expectChar(']');\n\n return new(tree.Attribute)(key, op, val);\n },\n\n //\n // The `block` rule is used by `ruleset` and `mixin.definition`.\n // It's a wrapper around the `primary` rule, with added `{}`.\n //\n block: function () {\n let content;\n if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) {\n return content;\n }\n },\n\n blockRuleset: function() {\n let block = this.block();\n\n if (block) {\n block = new tree.Ruleset(null, block);\n }\n return block;\n },\n\n detachedRuleset: function() {\n let argInfo;\n let params;\n let variadic;\n\n parserInput.save();\n if (parserInput.$re(/^[.#]\\(/)) {\n /**\n * DR args currently only implemented for each() function, and not \n * yet settable as `@dr: #(@arg) {}`\n * This should be done when DRs are merged with mixins.\n * See: https://github.com/less/less-meta/issues/16\n */\n argInfo = this.mixin.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return;\n }\n }\n const blockRuleset = this.blockRuleset();\n if (blockRuleset) {\n parserInput.forget();\n if (params) {\n return new tree.mixin.Definition(null, params, blockRuleset, null, variadic);\n }\n return new tree.DetachedRuleset(blockRuleset);\n }\n parserInput.restore();\n },\n\n //\n // div, .class, body > p {...}\n //\n ruleset: function () {\n let selectors;\n let rules;\n let debugInfo;\n\n parserInput.save();\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(parserInput.i);\n }\n\n selectors = this.selectors();\n\n if (selectors && (rules = this.block())) {\n parserInput.forget();\n const ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports);\n if (context.dumpLineNumbers) {\n ruleset.debugInfo = debugInfo;\n }\n return ruleset;\n } else {\n parserInput.restore();\n }\n },\n declaration: function () {\n let name;\n let value;\n const index = parserInput.i;\n let hasDR;\n const c = parserInput.currentChar();\n let important;\n let merge;\n let isVariable;\n\n if (c === '.' || c === '#' || c === '&' || c === ':') { return; }\n\n parserInput.save();\n\n name = this.variable() || this.ruleProperty();\n if (name) {\n isVariable = typeof name === 'string';\n\n if (isVariable) {\n value = this.detachedRuleset();\n if (value) {\n hasDR = true;\n }\n }\n\n parserInput.commentStore.length = 0;\n if (!value) {\n // a name returned by this.ruleProperty() is always an array of the form:\n // [string-1, ..., string-n, \"\"] or [string-1, ..., string-n, \"+\"]\n // where each item is a tree.Keyword or tree.Variable\n merge = !isVariable && name.length > 1 && name.pop().value;\n\n // Custom property values get permissive parsing\n if (name[0].value && name[0].value.slice(0, 2) === '--') {\n value = this.permissiveValue();\n }\n // Try to store values as anonymous\n // If we need the value later we'll re-parse it in ruleset.parseValue\n else {\n value = this.anonymousValue();\n }\n if (value) {\n parserInput.forget();\n // anonymous values absorb the end ';' which is required for them to work\n return new(tree.Declaration)(name, value, false, merge, index, fileInfo);\n }\n\n if (!value) {\n value = this.value();\n }\n\n if (value) {\n important = this.important();\n } else if (isVariable) {\n // As a last resort, try permissiveValue\n value = this.permissiveValue();\n }\n }\n\n if (value && (this.end() || hasDR)) {\n parserInput.forget();\n return new(tree.Declaration)(name, value, important, merge, index, fileInfo);\n }\n else {\n parserInput.restore();\n }\n } else {\n parserInput.restore();\n }\n },\n anonymousValue: function () {\n const index = parserInput.i;\n const match = parserInput.$re(/^([^.#@\\$+\\/'\"*`(;{}-]*);/);\n if (match) {\n return new(tree.Anonymous)(match[1], index);\n }\n },\n /**\n * Used for custom properties, at-rules, and variables (as fallback)\n * Parses almost anything inside of {} [] () \"\" blocks\n * until it reaches outer-most tokens.\n * \n * First, it will try to parse comments and entities to reach\n * the end. This is mostly like the Expression parser except no\n * math is allowed.\n */\n permissiveValue: function (untilTokens) {\n let i;\n let e;\n let done;\n let value;\n const tok = untilTokens || ';';\n const index = parserInput.i;\n const result = [];\n\n function testCurrentChar() {\n const char = parserInput.currentChar();\n if (typeof tok === 'string') {\n return char === tok;\n } else {\n return tok.test(char);\n }\n }\n if (testCurrentChar()) {\n return;\n }\n value = [];\n do {\n e = this.comment();\n if (e) {\n value.push(e);\n continue;\n }\n e = this.entity();\n if (e) {\n value.push(e);\n }\n } while (e);\n\n done = testCurrentChar();\n\n if (value.length > 0) {\n value = new(tree.Expression)(value);\n if (done) {\n return value;\n }\n else {\n result.push(value);\n }\n // Preserve space before $parseUntil as it will not\n if (parserInput.prevChar() === ' ') {\n result.push(new tree.Anonymous(' ', index));\n }\n }\n parserInput.save();\n\n value = parserInput.$parseUntil(tok);\n\n if (value) {\n if (typeof value === 'string') {\n error(`Expected '${value}'`, 'Parse');\n }\n if (value.length === 1 && value[0] === ' ') {\n parserInput.forget();\n return new tree.Anonymous('', index);\n }\n let item;\n for (i = 0; i < value.length; i++) {\n item = value[i];\n if (Array.isArray(item)) {\n // Treat actual quotes as normal quoted values\n result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo));\n }\n else {\n if (i === value.length - 1) {\n item = item.trim();\n }\n // Treat like quoted values, but replace vars like unquoted expressions\n const quote = new tree.Quoted('\\'', item, true, index, fileInfo);\n quote.variableRegex = /@([\\w-]+)/g;\n quote.propRegex = /\\$([\\w-]+)/g;\n result.push(quote);\n }\n }\n parserInput.forget();\n return new tree.Expression(result, true);\n }\n parserInput.restore();\n },\n\n //\n // An @import atrule\n //\n // @import \"lib\";\n //\n // Depending on our environment, importing is done differently:\n // In the browser, it's an XHR request, in Node, it would be a\n // file-system operation. The function used for importing is\n // stored in `import`, which we pass to the Import constructor.\n //\n 'import': function () {\n let path;\n let features;\n const index = parserInput.i;\n\n const dir = parserInput.$re(/^@import?\\s+/);\n\n if (dir) {\n const options = (dir ? this.importOptions() : null) || {};\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n features = this.mediaFeatures();\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon or unrecognised media features on import');\n }\n features = features && new(tree.Value)(features);\n return new(tree.Import)(path, features, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed import statement');\n }\n }\n },\n\n importOptions: function() {\n let o;\n const options = {};\n let optionName;\n let value;\n\n // list of options, surrounded by parens\n if (!parserInput.$char('(')) { return null; }\n do {\n o = this.importOption();\n if (o) {\n optionName = o;\n value = true;\n switch (optionName) {\n case 'css':\n optionName = 'less';\n value = false;\n break;\n case 'once':\n optionName = 'multiple';\n value = false;\n break;\n }\n options[optionName] = value;\n if (!parserInput.$char(',')) { break; }\n }\n } while (o);\n expectChar(')');\n return options;\n },\n\n importOption: function() {\n const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/);\n if (opt) {\n return opt[1];\n }\n },\n\n mediaFeature: function () {\n const entities = this.entities;\n const nodes = [];\n let e;\n let p;\n parserInput.save();\n do {\n e = entities.keyword() || entities.variable() || entities.mixinLookup();\n if (e) {\n nodes.push(e);\n } else if (parserInput.$char('(')) {\n p = this.property();\n e = this.value();\n if (parserInput.$char(')')) {\n if (p && e) {\n nodes.push(new(tree.Paren)(new(tree.Declaration)(p, e, null, null, parserInput.i, fileInfo, true)));\n } else if (e) {\n nodes.push(new(tree.Paren)(e));\n } else {\n error('badly formed media feature definition');\n }\n } else {\n error('Missing closing \\')\\'', 'Parse');\n }\n }\n } while (e);\n\n parserInput.forget();\n if (nodes.length > 0) {\n return new(tree.Expression)(nodes);\n }\n },\n\n mediaFeatures: function () {\n const entities = this.entities;\n const features = [];\n let e;\n do {\n e = this.mediaFeature();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n } else {\n e = entities.variable() || entities.mixinLookup();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n }\n } while (e);\n\n return features.length > 0 ? features : null;\n },\n\n media: function () {\n let features;\n let rules;\n let media;\n let debugInfo;\n const index = parserInput.i;\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(index);\n }\n\n parserInput.save();\n\n if (parserInput.$str('@media')) {\n features = this.mediaFeatures();\n\n rules = this.block();\n\n if (!rules) {\n error('media definitions require block statements after any features');\n }\n\n parserInput.forget();\n\n media = new(tree.Media)(rules, features, index, fileInfo);\n if (context.dumpLineNumbers) {\n media.debugInfo = debugInfo;\n }\n\n return media;\n }\n\n parserInput.restore();\n },\n\n //\n\n // A @plugin directive, used to import plugins dynamically.\n //\n // @plugin (args) \"lib\";\n //\n plugin: function () {\n let path;\n let args;\n let options;\n const index = parserInput.i;\n const dir = parserInput.$re(/^@plugin?\\s+/);\n\n if (dir) {\n args = this.pluginArgs();\n\n if (args) {\n options = {\n pluginArgs: args,\n isPlugin: true\n };\n }\n else {\n options = { isPlugin: true };\n }\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon on @plugin');\n }\n return new(tree.Import)(path, null, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed @plugin statement');\n }\n }\n },\n\n pluginArgs: function() {\n // list of options, surrounded by parens\n parserInput.save();\n if (!parserInput.$char('(')) {\n parserInput.restore();\n return null;\n }\n const args = parserInput.$re(/^\\s*([^\\);]+)\\)\\s*/);\n if (args[1]) {\n parserInput.forget();\n return args[1].trim();\n }\n else { \n parserInput.restore();\n return null;\n }\n },\n\n //\n // A CSS AtRule\n //\n // @charset \"utf-8\";\n //\n atrule: function () {\n const index = parserInput.i;\n let name;\n let value;\n let rules;\n let nonVendorSpecificName;\n let hasIdentifier;\n let hasExpression;\n let hasUnknown;\n let hasBlock = true;\n let isRooted = true;\n\n if (parserInput.currentChar() !== '@') { return; }\n\n value = this['import']() || this.plugin() || this.media();\n if (value) {\n return value;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^@[a-z-]+/);\n\n if (!name) { return; }\n\n nonVendorSpecificName = name;\n if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {\n nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`;\n }\n\n switch (nonVendorSpecificName) {\n case '@charset':\n hasIdentifier = true;\n hasBlock = false;\n break;\n case '@namespace':\n hasExpression = true;\n hasBlock = false;\n break;\n case '@keyframes':\n case '@counter-style':\n hasIdentifier = true;\n break;\n case '@document':\n case '@supports':\n hasUnknown = true;\n isRooted = false;\n break;\n default:\n hasUnknown = true;\n break;\n }\n\n parserInput.commentStore.length = 0;\n\n if (hasIdentifier) {\n value = this.entity();\n if (!value) {\n error(`expected ${name} identifier`);\n }\n } else if (hasExpression) {\n value = this.expression();\n if (!value) {\n error(`expected ${name} expression`);\n }\n } else if (hasUnknown) {\n value = this.permissiveValue(/^[{;]/);\n hasBlock = (parserInput.currentChar() === '{');\n if (!value) {\n if (!hasBlock && parserInput.currentChar() !== ';') {\n error(`${name} rule is missing block or ending semi-colon`);\n }\n }\n else if (!value.value) {\n value = null;\n }\n }\n\n if (hasBlock) {\n rules = this.blockRuleset();\n }\n\n if (rules || (!hasBlock && value && parserInput.$char(';'))) {\n parserInput.forget();\n return new(tree.AtRule)(name, value, rules, index, fileInfo,\n context.dumpLineNumbers ? getDebugInfo(index) : null,\n isRooted\n );\n }\n\n parserInput.restore('at-rule options not recognised');\n },\n\n //\n // A Value is a comma-delimited list of Expressions\n //\n // font-family: Baskerville, Georgia, serif;\n //\n // In a Rule, a Value represents everything after the `:`,\n // and before the `;`.\n //\n value: function () {\n let e;\n const expressions = [];\n const index = parserInput.i;\n\n do {\n e = this.expression();\n if (e) {\n expressions.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n } while (e);\n\n if (expressions.length > 0) {\n return new(tree.Value)(expressions, index);\n }\n },\n important: function () {\n if (parserInput.currentChar() === '!') {\n return parserInput.$re(/^! *important/);\n }\n },\n sub: function () {\n let a;\n let e;\n\n parserInput.save();\n if (parserInput.$char('(')) {\n a = this.addition();\n if (a && parserInput.$char(')')) {\n parserInput.forget();\n e = new(tree.Expression)([a]);\n e.parens = true;\n return e;\n }\n parserInput.restore('Expected \\')\\'');\n return;\n }\n parserInput.restore();\n },\n multiplication: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.operand();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n if (parserInput.peek(/^\\/[*\\/]/)) {\n break;\n }\n\n parserInput.save();\n\n op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./');\n\n if (!op) { parserInput.forget(); break; }\n\n a = this.operand();\n\n if (!a) { parserInput.restore(); break; }\n parserInput.forget();\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n addition: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.multiplication();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n op = parserInput.$re(/^[-+]\\s+/) || (!isSpaced && (parserInput.$char('+') || parserInput.$char('-')));\n if (!op) {\n break;\n }\n a = this.multiplication();\n if (!a) {\n break;\n }\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n conditions: function () {\n let a;\n let b;\n const index = parserInput.i;\n let condition;\n\n a = this.condition(true);\n if (a) {\n while (true) {\n if (!parserInput.peek(/^,\\s*(not\\s*)?\\(/) || !parserInput.$char(',')) {\n break;\n }\n b = this.condition(true);\n if (!b) {\n break;\n }\n condition = new(tree.Condition)('or', condition || a, b, index);\n }\n return condition || a;\n }\n },\n condition: function (needsParens) {\n let result;\n let logical;\n let next;\n function or() {\n return parserInput.$str('or');\n }\n\n result = this.conditionAnd(needsParens);\n if (!result) {\n return ;\n }\n logical = or();\n if (logical) {\n next = this.condition(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n conditionAnd: function (needsParens) {\n let result;\n let logical;\n let next;\n const self = this;\n function insideCondition() {\n const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens);\n if (!cond && !needsParens) {\n return self.atomicCondition(needsParens);\n }\n return cond;\n }\n function and() {\n return parserInput.$str('and');\n }\n\n result = insideCondition();\n if (!result) {\n return ;\n }\n logical = and();\n if (logical) {\n next = this.conditionAnd(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n negatedCondition: function (needsParens) {\n if (parserInput.$str('not')) {\n const result = this.parenthesisCondition(needsParens);\n if (result) {\n result.negate = !result.negate;\n }\n return result;\n }\n },\n parenthesisCondition: function (needsParens) {\n function tryConditionFollowedByParenthesis(me) {\n let body;\n parserInput.save();\n body = me.condition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return ;\n }\n parserInput.forget();\n return body;\n }\n\n let body;\n parserInput.save();\n if (!parserInput.$str('(')) {\n parserInput.restore();\n return ;\n }\n body = tryConditionFollowedByParenthesis(this);\n if (body) {\n parserInput.forget();\n return body;\n }\n\n body = this.atomicCondition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`);\n return ;\n }\n parserInput.forget();\n return body;\n },\n atomicCondition: function (needsParens) {\n const entities = this.entities;\n const index = parserInput.i;\n let a;\n let b;\n let c;\n let op;\n\n function cond() {\n return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup();\n }\n cond = cond.bind(this);\n\n a = cond();\n if (a) {\n if (parserInput.$char('>')) {\n if (parserInput.$char('=')) {\n op = '>=';\n } else {\n op = '>';\n }\n } else\n if (parserInput.$char('<')) {\n if (parserInput.$char('=')) {\n op = '<=';\n } else {\n op = '<';\n }\n } else\n if (parserInput.$char('=')) {\n if (parserInput.$char('>')) {\n op = '=>';\n } else if (parserInput.$char('<')) {\n op = '=<';\n } else {\n op = '=';\n }\n }\n if (op) {\n b = cond();\n if (b) {\n c = new(tree.Condition)(op, a, b, index, false);\n } else {\n error('expected expression');\n }\n } else {\n c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, false);\n }\n return c;\n }\n },\n\n //\n // An operand is anything that can be part of an operation,\n // such as a Color, or a Variable\n //\n operand: function () {\n const entities = this.entities;\n let negate;\n\n if (parserInput.peek(/^-[@\\$\\(]/)) {\n negate = parserInput.$char('-');\n }\n\n let o = this.sub() || entities.dimension() ||\n entities.color() || entities.variable() ||\n entities.property() || entities.call() ||\n entities.quoted(true) || entities.colorKeyword() ||\n entities.mixinLookup();\n\n if (negate) {\n o.parensInOp = true;\n o = new(tree.Negative)(o);\n }\n\n return o;\n },\n\n //\n // Expressions either represent mathematical operations,\n // or white-space delimited Entities.\n //\n // 1px solid black\n // @var * 2\n //\n expression: function () {\n const entities = [];\n let e;\n let delim;\n const index = parserInput.i;\n\n do {\n e = this.comment();\n if (e) {\n entities.push(e);\n continue;\n }\n e = this.addition() || this.entity();\n if (e) {\n entities.push(e);\n // operations do not allow keyword \"/\" dimension (e.g. small/20px) so we support that here\n if (!parserInput.peek(/^\\/[\\/*]/)) {\n delim = parserInput.$char('/');\n if (delim) {\n entities.push(new(tree.Anonymous)(delim, index));\n }\n }\n }\n } while (e);\n if (entities.length > 0) {\n return new(tree.Expression)(entities);\n }\n },\n property: function () {\n const name = parserInput.$re(/^(\\*?-?[_a-zA-Z0-9-]+)\\s*:/);\n if (name) {\n return name[1];\n }\n },\n ruleProperty: function () {\n let name = [];\n const index = [];\n let s;\n let k;\n\n parserInput.save();\n\n const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\\s*:/);\n if (simpleProperty) {\n name = [new(tree.Keyword)(simpleProperty[1])];\n parserInput.forget();\n return name;\n }\n\n function match(re) {\n const i = parserInput.i;\n const chunk = parserInput.$re(re);\n if (chunk) {\n index.push(i);\n return name.push(chunk[1]);\n }\n }\n\n match(/^(\\*?)/);\n while (true) {\n if (!match(/^((?:[\\w-]+)|(?:[@\\$]\\{[\\w-]+\\}))/)) {\n break;\n }\n }\n\n if ((name.length > 1) && match(/^((?:\\+_|\\+)?)\\s*:/)) {\n parserInput.forget();\n\n // at last, we have the complete match now. move forward,\n // convert name particles to tree objects and return:\n if (name[0] === '') {\n name.shift();\n index.shift();\n }\n for (k = 0; k < name.length; k++) {\n s = name[k];\n name[k] = (s.charAt(0) !== '@' && s.charAt(0) !== '$') ?\n new(tree.Keyword)(s) :\n (s.charAt(0) === '@' ?\n new(tree.Variable)(`@${s.slice(2, -1)}`, index[k], fileInfo) :\n new(tree.Property)(`$${s.slice(2, -1)}`, index[k], fileInfo));\n }\n return name;\n }\n parserInput.restore();\n }\n }\n };\n};\nParser.serializeVars = vars => {\n let s = '';\n\n for (const name in vars) {\n if (Object.hasOwnProperty.call(vars, name)) {\n const value = vars[name];\n s += `${((name[0] === '@') ? '' : '@') + name}: ${value}${(String(value).slice(-1) === ';') ? '' : ';'}`;\n }\n }\n\n return s;\n};\n\nexport default Parser;\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nlet colorFunctions;\n\nfunction clamp(val) {\n return Math.min(1, Math.max(0, val));\n}\nfunction hsla(origColor, hsl) {\n const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a);\n if (color) {\n if (origColor.value && \n /^(rgb|hsl)/.test(origColor.value)) {\n color.value = origColor.value;\n } else {\n color.value = 'rgb';\n }\n return color;\n }\n}\nfunction toHSL(color) {\n if (color.toHSL) {\n return color.toHSL();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction toHSV(color) {\n if (color.toHSV) {\n return color.toHSV();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction number(n) {\n if (n instanceof Dimension) {\n return parseFloat(n.unit.is('%') ? n.value / 100 : n.value);\n } else if (typeof n === 'number') {\n return n;\n } else {\n throw {\n type: 'Argument',\n message: 'color functions take numbers as parameters'\n };\n }\n}\nfunction scaled(n, size) {\n if (n instanceof Dimension && n.unit.is('%')) {\n return parseFloat(n.value * size / 100);\n } else {\n return number(n);\n }\n}\ncolorFunctions = {\n rgb: function (r, g, b) {\n const color = colorFunctions.rgba(r, g, b, 1.0);\n if (color) {\n color.value = 'rgb';\n return color;\n }\n },\n rgba: function (r, g, b, a) {\n try {\n if (r instanceof Color) {\n if (g) {\n a = number(g);\n } else {\n a = r.alpha;\n }\n return new Color(r.rgb, a, 'rgba');\n }\n const rgb = [r, g, b].map(c => scaled(c, 255));\n a = number(a);\n return new Color(rgb, a, 'rgba');\n }\n catch (e) {}\n },\n hsl: function (h, s, l) {\n const color = colorFunctions.hsla(h, s, l, 1.0);\n if (color) {\n color.value = 'hsl';\n return color;\n }\n },\n hsla: function (h, s, l, a) {\n try {\n if (h instanceof Color) {\n if (s) {\n a = number(s);\n } else {\n a = h.alpha;\n }\n return new Color(h.rgb, a, 'hsla');\n }\n\n let m1;\n let m2;\n\n function hue(h) {\n h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);\n if (h * 6 < 1) {\n return m1 + (m2 - m1) * h * 6;\n }\n else if (h * 2 < 1) {\n return m2;\n }\n else if (h * 3 < 2) {\n return m1 + (m2 - m1) * (2 / 3 - h) * 6;\n }\n else {\n return m1;\n }\n }\n\n h = (number(h) % 360) / 360;\n s = clamp(number(s));l = clamp(number(l));a = clamp(number(a));\n\n m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;\n m1 = l * 2 - m2;\n\n const rgb = [\n hue(h + 1 / 3) * 255,\n hue(h) * 255,\n hue(h - 1 / 3) * 255\n ];\n a = number(a);\n return new Color(rgb, a, 'hsla');\n }\n catch (e) {}\n },\n\n hsv: function(h, s, v) {\n return colorFunctions.hsva(h, s, v, 1.0);\n },\n\n hsva: function(h, s, v, a) {\n h = ((number(h) % 360) / 360) * 360;\n s = number(s);v = number(v);a = number(a);\n\n let i;\n let f;\n i = Math.floor((h / 60) % 6);\n f = (h / 60) - i;\n\n const vs = [v,\n v * (1 - s),\n v * (1 - f * s),\n v * (1 - (1 - f) * s)];\n const perm = [[0, 3, 1],\n [2, 0, 1],\n [1, 0, 3],\n [1, 2, 0],\n [3, 1, 0],\n [0, 1, 2]];\n\n return colorFunctions.rgba(vs[perm[i][0]] * 255,\n vs[perm[i][1]] * 255,\n vs[perm[i][2]] * 255,\n a);\n },\n\n hue: function (color) {\n return new Dimension(toHSL(color).h);\n },\n saturation: function (color) {\n return new Dimension(toHSL(color).s * 100, '%');\n },\n lightness: function (color) {\n return new Dimension(toHSL(color).l * 100, '%');\n },\n hsvhue: function(color) {\n return new Dimension(toHSV(color).h);\n },\n hsvsaturation: function (color) {\n return new Dimension(toHSV(color).s * 100, '%');\n },\n hsvvalue: function (color) {\n return new Dimension(toHSV(color).v * 100, '%');\n },\n red: function (color) {\n return new Dimension(color.rgb[0]);\n },\n green: function (color) {\n return new Dimension(color.rgb[1]);\n },\n blue: function (color) {\n return new Dimension(color.rgb[2]);\n },\n alpha: function (color) {\n return new Dimension(toHSL(color).a);\n },\n luma: function (color) {\n return new Dimension(color.luma() * color.alpha * 100, '%');\n },\n luminance: function (color) {\n const luminance =\n (0.2126 * color.rgb[0] / 255) +\n (0.7152 * color.rgb[1] / 255) +\n (0.0722 * color.rgb[2] / 255);\n\n return new Dimension(luminance * color.alpha * 100, '%');\n },\n saturate: function (color, amount, method) {\n // filter: saturate(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s += hsl.s * amount.value / 100;\n }\n else {\n hsl.s += amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n desaturate: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s -= hsl.s * amount.value / 100;\n }\n else {\n hsl.s -= amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n lighten: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l += hsl.l * amount.value / 100;\n }\n else {\n hsl.l += amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n darken: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l -= hsl.l * amount.value / 100;\n }\n else {\n hsl.l -= amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n fadein: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a += hsl.a * amount.value / 100;\n }\n else {\n hsl.a += amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fadeout: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a -= hsl.a * amount.value / 100;\n }\n else {\n hsl.a -= amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fade: function (color, amount) {\n const hsl = toHSL(color);\n\n hsl.a = amount.value / 100;\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n spin: function (color, amount) {\n const hsl = toHSL(color);\n const hue = (hsl.h + amount.value) % 360;\n\n hsl.h = hue < 0 ? 360 + hue : hue;\n\n return hsla(color, hsl);\n },\n //\n // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein\n // http://sass-lang.com\n //\n mix: function (color1, color2, weight) {\n if (!weight) {\n weight = new Dimension(50);\n }\n const p = weight.value / 100.0;\n const w = p * 2 - 1;\n const a = toHSL(color1).a - toHSL(color2).a;\n\n const w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;\n const w2 = 1 - w1;\n\n const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,\n color1.rgb[1] * w1 + color2.rgb[1] * w2,\n color1.rgb[2] * w1 + color2.rgb[2] * w2];\n\n const alpha = color1.alpha * p + color2.alpha * (1 - p);\n\n return new Color(rgb, alpha);\n },\n greyscale: function (color) {\n return colorFunctions.desaturate(color, new Dimension(100));\n },\n contrast: function (color, dark, light, threshold) {\n // filter: contrast(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n if (typeof light === 'undefined') {\n light = colorFunctions.rgba(255, 255, 255, 1.0);\n }\n if (typeof dark === 'undefined') {\n dark = colorFunctions.rgba(0, 0, 0, 1.0);\n }\n // Figure out which is actually light and dark:\n if (dark.luma() > light.luma()) {\n const t = light;\n light = dark;\n dark = t;\n }\n if (typeof threshold === 'undefined') {\n threshold = 0.43;\n } else {\n threshold = number(threshold);\n }\n if (color.luma() < threshold) {\n return light;\n } else {\n return dark;\n }\n },\n // Changes made in 2.7.0 - Reverted in 3.0.0\n // contrast: function (color, color1, color2, threshold) {\n // // Return which of `color1` and `color2` has the greatest contrast with `color`\n // // according to the standard WCAG contrast ratio calculation.\n // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef\n // // The threshold param is no longer used, in line with SASS.\n // // filter: contrast(3.2);\n // // should be kept as is, so check for color\n // if (!color.rgb) {\n // return null;\n // }\n // if (typeof color1 === 'undefined') {\n // color1 = colorFunctions.rgba(0, 0, 0, 1.0);\n // }\n // if (typeof color2 === 'undefined') {\n // color2 = colorFunctions.rgba(255, 255, 255, 1.0);\n // }\n // var contrast1, contrast2;\n // var luma = color.luma();\n // var luma1 = color1.luma();\n // var luma2 = color2.luma();\n // // Calculate contrast ratios for each color\n // if (luma > luma1) {\n // contrast1 = (luma + 0.05) / (luma1 + 0.05);\n // } else {\n // contrast1 = (luma1 + 0.05) / (luma + 0.05);\n // }\n // if (luma > luma2) {\n // contrast2 = (luma + 0.05) / (luma2 + 0.05);\n // } else {\n // contrast2 = (luma2 + 0.05) / (luma + 0.05);\n // }\n // if (contrast1 > contrast2) {\n // return color1;\n // } else {\n // return color2;\n // }\n // },\n argb: function (color) {\n return new Anonymous(color.toARGB());\n },\n color: function(c) {\n if ((c instanceof Quoted) &&\n (/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value))) {\n const val = c.value.slice(1);\n return new Color(val, undefined, `#${val}`);\n }\n if ((c instanceof Color) || (c = Color.fromKeyword(c.value))) {\n c.value = undefined;\n return c;\n }\n throw {\n type: 'Argument',\n message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF'\n };\n },\n tint: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount);\n },\n shade: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount);\n }\n};\n\nexport default colorFunctions;\n","import Anonymous from '../tree/anonymous';\nimport Keyword from '../tree/keyword';\n\nfunction boolean(condition) {\n return condition ? Keyword.True : Keyword.False;\n}\n\nfunction If(condition, trueValue, falseValue) {\n return condition ? trueValue\n : (falseValue || new Anonymous);\n}\n\nexport default { boolean, 'if': If };\n","import Color from '../tree/color';\n\n// Color Blending\n// ref: http://www.w3.org/TR/compositing-1\n\nfunction colorBlend(mode, color1, color2) {\n const ab = color1.alpha; // result\n\n let // backdrop\n cb;\n\n const as = color2.alpha;\n\n let // source\n cs;\n\n let ar;\n let cr;\n const r = [];\n\n ar = as + ab * (1 - as);\n for (let i = 0; i < 3; i++) {\n cb = color1.rgb[i] / 255;\n cs = color2.rgb[i] / 255;\n cr = mode(cb, cs);\n if (ar) {\n cr = (as * cs + ab * (cb -\n as * (cb + cs - cr))) / ar;\n }\n r[i] = cr * 255;\n }\n\n return new Color(r, ar);\n}\n\nconst colorBlendModeFunctions = {\n multiply: function(cb, cs) {\n return cb * cs;\n },\n screen: function(cb, cs) {\n return cb + cs - cb * cs;\n },\n overlay: function(cb, cs) {\n cb *= 2;\n return (cb <= 1) ?\n colorBlendModeFunctions.multiply(cb, cs) :\n colorBlendModeFunctions.screen(cb - 1, cs);\n },\n softlight: function(cb, cs) {\n let d = 1;\n let e = cb;\n if (cs > 0.5) {\n e = 1;\n d = (cb > 0.25) ? Math.sqrt(cb)\n : ((16 * cb - 12) * cb + 4) * cb;\n }\n return cb - (1 - 2 * cs) * e * (d - cb);\n },\n hardlight: function(cb, cs) {\n return colorBlendModeFunctions.overlay(cs, cb);\n },\n difference: function(cb, cs) {\n return Math.abs(cb - cs);\n },\n exclusion: function(cb, cs) {\n return cb + cs - 2 * cb * cs;\n },\n\n // non-w3c functions:\n average: function(cb, cs) {\n return (cb + cs) / 2;\n },\n negation: function(cb, cs) {\n return 1 - Math.abs(cb + cs - 1);\n }\n};\n\nfor (const f in colorBlendModeFunctions) {\n if (colorBlendModeFunctions.hasOwnProperty(f)) {\n colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]);\n }\n}\n\nexport default colorBlend;\n","import Comment from '../tree/comment';\nimport Dimension from '../tree/dimension';\nimport Declaration from '../tree/declaration';\nimport Expression from '../tree/expression';\nimport Ruleset from '../tree/ruleset';\nimport Selector from '../tree/selector';\nimport Element from '../tree/element';\nimport Quote from '../tree/quoted';\n\nconst getItemsFromNode = node => {\n // handle non-array values as an array of length 1\n // return 'undefined' if index is invalid\n const items = Array.isArray(node.value) ?\n node.value : Array(node);\n\n return items;\n};\n\nexport default {\n _SELF: function(n) {\n return n;\n },\n extract: function(values, index) {\n index = index.value - 1; // (1-based index)\n\n return getItemsFromNode(values)[index];\n },\n length: function(values) {\n return new Dimension(getItemsFromNode(values).length);\n },\n /**\n * Creates a Less list of incremental values.\n * Modeled after Lodash's range function, also exists natively in PHP\n * \n * @param {Dimension} [start=1]\n * @param {Dimension} end - e.g. 10 or 10px - unit is added to output\n * @param {Dimension} [step=1] \n */\n range: function(start, end, step) {\n let from;\n let to;\n let stepValue = 1;\n const list = [];\n if (end) {\n to = end;\n from = start.value;\n if (step) {\n stepValue = step.value;\n }\n }\n else {\n from = 1;\n to = start;\n }\n\n for (let i = from; i <= to.value; i += stepValue) {\n list.push(new Dimension(i, to.unit));\n }\n\n return new Expression(list);\n },\n each: function(list, rs) {\n const rules = [];\n let newRules;\n let iterator;\n\n if (list.value && !(list instanceof Quote)) {\n if (Array.isArray(list.value)) {\n iterator = list.value;\n } else {\n iterator = [list.value];\n }\n } else if (list.ruleset) {\n iterator = list.ruleset.rules;\n } else if (list.rules) {\n iterator = list.rules;\n } else if (Array.isArray(list)) {\n iterator = list;\n } else {\n iterator = [list];\n }\n\n let valueName = '@value';\n let keyName = '@key';\n let indexName = '@index';\n\n if (rs.params) {\n valueName = rs.params[0] && rs.params[0].name;\n keyName = rs.params[1] && rs.params[1].name;\n indexName = rs.params[2] && rs.params[2].name;\n rs = rs.rules;\n } else {\n rs = rs.ruleset;\n }\n\n for (let i = 0; i < iterator.length; i++) {\n let key;\n let value;\n const item = iterator[i];\n if (item instanceof Declaration) {\n key = typeof item.name === 'string' ? item.name : item.name[0].value;\n value = item.value;\n } else {\n key = new Dimension(i + 1);\n value = item;\n }\n\n if (item instanceof Comment) {\n continue;\n }\n\n newRules = rs.rules.slice(0);\n if (valueName) {\n newRules.push(new Declaration(valueName,\n value,\n false, false, this.index, this.currentFileInfo));\n }\n if (indexName) {\n newRules.push(new Declaration(indexName,\n new Dimension(i + 1),\n false, false, this.index, this.currentFileInfo));\n }\n if (keyName) {\n newRules.push(new Declaration(keyName,\n key,\n false, false, this.index, this.currentFileInfo));\n }\n\n rules.push(new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n newRules,\n rs.strictImports,\n rs.visibilityInfo()\n ));\n }\n\n return new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n rules,\n rs.strictImports,\n rs.visibilityInfo()\n ).eval(this.context);\n }\n};\n","import Dimension from '../tree/dimension';\n\nconst MathHelper = (fn, unit, n) => {\n if (!(n instanceof Dimension)) {\n throw { type: 'Argument', message: 'argument must be a number' };\n }\n if (unit == null) {\n unit = n.unit;\n } else {\n n = n.unify();\n }\n return new Dimension(fn(parseFloat(n.value)), unit);\n};\n\nexport default MathHelper;","import mathHelper from './math-helper.js';\n\nconst mathFunctions = {\n // name, unit\n ceil: null,\n floor: null,\n sqrt: null,\n abs: null,\n tan: '',\n sin: '',\n cos: '',\n atan: 'rad',\n asin: 'rad',\n acos: 'rad'\n};\n\nfor (const f in mathFunctions) {\n if (mathFunctions.hasOwnProperty(f)) {\n mathFunctions[f] = mathHelper.bind(null, Math[f], mathFunctions[f]);\n }\n}\n\nmathFunctions.round = (n, f) => {\n const fraction = typeof f === 'undefined' ? 0 : f.value;\n return mathHelper(num => num.toFixed(fraction), null, n);\n};\n\nexport default mathFunctions;\n","import Dimension from '../tree/dimension';\nimport Anonymous from '../tree/anonymous';\nimport mathHelper from './math-helper.js';\n\nconst minMax = function (isMin, args) {\n args = Array.prototype.slice.call(args);\n switch (args.length) {\n case 0: throw { type: 'Argument', message: 'one or more arguments required' };\n }\n let i; // key is the unit.toString() for unified Dimension values,\n let j;\n let current;\n let currentUnified;\n let referenceUnified;\n let unit;\n let unitStatic;\n let unitClone;\n\n const // elems only contains original argument values.\n order = [];\n\n const values = {};\n // value is the index into the order array.\n for (i = 0; i < args.length; i++) {\n current = args[i];\n if (!(current instanceof Dimension)) {\n if (Array.isArray(args[i].value)) {\n Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value));\n }\n continue;\n }\n currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify();\n unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString();\n unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic;\n unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone;\n j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit];\n if (j === undefined) {\n if (unitStatic !== undefined && unit !== unitStatic) {\n throw { type: 'Argument', message: 'incompatible types' };\n }\n values[unit] = order.length;\n order.push(current);\n continue;\n }\n referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify();\n if ( isMin && currentUnified.value < referenceUnified.value ||\n !isMin && currentUnified.value > referenceUnified.value) {\n order[j] = current;\n }\n }\n if (order.length == 1) {\n return order[0];\n }\n args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', ');\n return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`);\n};\n\nexport default {\n min: function(...args) {\n return minMax(true, args);\n },\n max: function(...args) {\n return minMax(false, args);\n },\n convert: function (val, unit) {\n return val.convertTo(unit.value);\n },\n pi: function () {\n return new Dimension(Math.PI);\n },\n mod: function(a, b) {\n return new Dimension(a.value % b.value, a.unit);\n },\n pow: function(x, y) {\n if (typeof x === 'number' && typeof y === 'number') {\n x = new Dimension(x);\n y = new Dimension(y);\n } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) {\n throw { type: 'Argument', message: 'arguments must be numbers' };\n }\n\n return new Dimension(Math.pow(x.value, y.value), x.unit);\n },\n percentage: function (n) {\n const result = mathHelper(num => num * 100, '%', n);\n\n return result;\n }\n};\n","/**\n * Plugin Manager\n */\nclass PluginManager {\n constructor(less) {\n this.less = less;\n this.visitors = [];\n this.preProcessors = [];\n this.postProcessors = [];\n this.installedPlugins = [];\n this.fileManagers = [];\n this.iterator = -1;\n this.pluginCache = {};\n this.Loader = new less.PluginLoader(less);\n }\n\n /**\n * Adds all the plugins in the array\n * @param {Array} plugins\n */\n addPlugins(plugins) {\n if (plugins) {\n for (let i = 0; i < plugins.length; i++) {\n this.addPlugin(plugins[i]);\n }\n }\n }\n\n /**\n *\n * @param plugin\n * @param {String} filename\n */\n addPlugin(plugin, filename, functionRegistry) {\n this.installedPlugins.push(plugin);\n if (filename) {\n this.pluginCache[filename] = plugin;\n }\n if (plugin.install) {\n plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry);\n }\n }\n\n /**\n *\n * @param filename\n */\n get(filename) {\n return this.pluginCache[filename];\n }\n\n /**\n * Adds a visitor. The visitor object has options on itself to determine\n * when it should run.\n * @param visitor\n */\n addVisitor(visitor) {\n this.visitors.push(visitor);\n }\n\n /**\n * Adds a pre processor object\n * @param {object} preProcessor\n * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import\n */\n addPreProcessor(preProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) {\n if (this.preProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.preProcessors.splice(indexToInsertAt, 0, {preProcessor, priority});\n }\n\n /**\n * Adds a post processor object\n * @param {object} postProcessor\n * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression\n */\n addPostProcessor(postProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) {\n if (this.postProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.postProcessors.splice(indexToInsertAt, 0, {postProcessor, priority});\n }\n\n /**\n *\n * @param manager\n */\n addFileManager(manager) {\n this.fileManagers.push(manager);\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPreProcessors() {\n const preProcessors = [];\n for (let i = 0; i < this.preProcessors.length; i++) {\n preProcessors.push(this.preProcessors[i].preProcessor);\n }\n return preProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPostProcessors() {\n const postProcessors = [];\n for (let i = 0; i < this.postProcessors.length; i++) {\n postProcessors.push(this.postProcessors[i].postProcessor);\n }\n return postProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getVisitors() {\n return this.visitors;\n }\n\n visitor() {\n const self = this;\n return {\n first: function() {\n self.iterator = -1;\n return self.visitors[self.iterator];\n },\n get: function() {\n self.iterator += 1;\n return self.visitors[self.iterator];\n }\n };\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getFileManagers() {\n return this.fileManagers;\n }\n}\n\nlet pm;\n\nfunction PluginManagerFactory(less, newFactory) {\n if (newFactory || !pm) {\n pm = new PluginManager(less);\n }\n return pm;\n};\n\n//\nexport default PluginManagerFactory;\n","import Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport Quote from '../tree/quoted';\nimport JavaScript from '../tree/javascript';\n\nexport default {\n e: function (str) {\n return new Quote('\"', str instanceof JavaScript ? str.evaluated : str.value, true);\n },\n escape: function (str) {\n return new Anonymous(\n encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B')\n .replace(/\\(/g, '%28').replace(/\\)/g, '%29'));\n },\n replace: function (string, pattern, replacement, flags) {\n let result = string.value;\n replacement = (replacement.type === 'Quoted') ?\n replacement.value : replacement.toCSS();\n result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement);\n return new Quoted(string.quote || '', result, string.escaped);\n },\n '%': function (string /* arg, arg, ... */) {\n const args = Array.prototype.slice.call(arguments, 1);\n let result = string.value;\n\n for (let i = 0; i < args.length; i++) {\n /* jshint loopfunc:true */\n result = result.replace(/%[sda]/i, token => {\n const value = ((args[i].type === 'Quoted') &&\n token.match(/s/i)) ? args[i].value : args[i].toCSS();\n return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;\n });\n }\n result = result.replace(/%%/g, '%');\n return new Quoted(string.quote || '', result, string.escaped);\n }\n};\n","import Keyword from '../tree/keyword';\nimport DetachedRuleset from '../tree/detached-ruleset';\nimport Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport URL from '../tree/url';\nimport Operation from '../tree/operation';\n\nconst isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False;\nconst isunit = (n, unit) => {\n if (unit === undefined) {\n throw { type: 'Argument', message: 'missing the required second argument to isunit.' };\n }\n unit = typeof unit.value === 'string' ? unit.value : unit;\n if (typeof unit !== 'string') {\n throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' };\n }\n return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False;\n};\n\nexport default {\n isruleset: function (n) {\n return isa(n, DetachedRuleset);\n },\n iscolor: function (n) {\n return isa(n, Color);\n },\n isnumber: function (n) {\n return isa(n, Dimension);\n },\n isstring: function (n) {\n return isa(n, Quoted);\n },\n iskeyword: function (n) {\n return isa(n, Keyword);\n },\n isurl: function (n) {\n return isa(n, URL);\n },\n ispixel: function (n) {\n return isunit(n, 'px');\n },\n ispercentage: function (n) {\n return isunit(n, '%');\n },\n isem: function (n) {\n return isunit(n, 'em');\n },\n isunit,\n unit: function (val, unit) {\n if (!(val instanceof Dimension)) {\n throw { type: 'Argument',\n message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` };\n }\n if (unit) {\n if (unit instanceof Keyword) {\n unit = unit.value;\n } else {\n unit = unit.toCSS();\n }\n } else {\n unit = '';\n }\n return new Dimension(val.value, unit);\n },\n 'get-unit': function (n) {\n return new Anonymous(n.unit);\n }\n};\n","import functionRegistry from './function-registry';\nimport functionCaller from './function-caller';\n\nimport boolean from './boolean';\nimport defaultFunc from './default';\nimport color from './color';\nimport colorBlending from './color-blending';\nimport dataUri from './data-uri';\nimport list from './list';\nimport math from './math';\nimport number from './number';\nimport string from './string';\nimport svg from './svg';\nimport types from './types';\n\nexport default environment => {\n const functions = { functionRegistry, functionCaller };\n\n // register functions\n functionRegistry.addMultiple(boolean);\n functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc));\n functionRegistry.addMultiple(color);\n functionRegistry.addMultiple(colorBlending);\n functionRegistry.addMultiple(dataUri(environment));\n functionRegistry.addMultiple(list);\n functionRegistry.addMultiple(math);\n functionRegistry.addMultiple(number);\n functionRegistry.addMultiple(string);\n functionRegistry.addMultiple(svg(environment));\n functionRegistry.addMultiple(types);\n\n return functions;\n};\n","import Quoted from '../tree/quoted';\nimport URL from '../tree/url';\nimport * as utils from '../utils';\nimport logger from '../logger';\n\nexport default environment => {\n \n const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); \n\n return { 'data-uri': function(mimetypeNode, filePathNode) {\n\n if (!filePathNode) {\n filePathNode = mimetypeNode;\n mimetypeNode = null;\n }\n\n let mimetype = mimetypeNode && mimetypeNode.value;\n let filePath = filePathNode.value;\n const currentFileInfo = this.currentFileInfo;\n const currentDirectory = currentFileInfo.rewriteUrls ?\n currentFileInfo.currentDirectory : currentFileInfo.entryPath;\n\n const fragmentStart = filePath.indexOf('#');\n let fragment = '';\n if (fragmentStart !== -1) {\n fragment = filePath.slice(fragmentStart);\n filePath = filePath.slice(0, fragmentStart);\n }\n const context = utils.clone(this.context);\n context.rawBuffer = true;\n\n const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true);\n\n if (!fileManager) {\n return fallback(this, filePathNode);\n }\n\n let useBase64 = false;\n\n // detect the mimetype if not given\n if (!mimetypeNode) {\n\n mimetype = environment.mimeLookup(filePath);\n\n if (mimetype === 'image/svg+xml') {\n useBase64 = false;\n } else {\n // use base 64 unless it's an ASCII or UTF-8 format\n const charset = environment.charsetLookup(mimetype);\n useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0;\n }\n if (useBase64) { mimetype += ';base64'; }\n }\n else {\n useBase64 = /;base64$/.test(mimetype);\n }\n\n const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment);\n if (!fileSync.contents) {\n logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`);\n return fallback(this, filePathNode || mimetypeNode);\n }\n let buf = fileSync.contents;\n if (useBase64 && !environment.encodeBase64) {\n return fallback(this, filePathNode);\n }\n\n buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf);\n\n const uri = `data:${mimetype},${buf}${fragment}`;\n\n return new URL(new Quoted(`\"${uri}\"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Expression from '../tree/expression';\nimport Quoted from '../tree/quoted';\nimport URL from '../tree/url';\n\nexport default environment => {\n return { 'svg-gradient': function(direction) {\n let stops;\n let gradientDirectionSvg;\n let gradientType = 'linear';\n let rectangleDimension = 'x=\"0\" y=\"0\" width=\"1\" height=\"1\"';\n const renderEnv = {compress: false};\n let returner;\n const directionValue = direction.toCSS(renderEnv);\n let i;\n let color;\n let position;\n let positionValue;\n let alpha;\n\n function throwArgumentDescriptor() {\n throw { type: 'Argument',\n message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' +\n ' end_color [end_position] or direction, color list' };\n }\n\n if (arguments.length == 2) {\n if (arguments[1].value.length < 2) {\n throwArgumentDescriptor();\n }\n stops = arguments[1].value;\n } else if (arguments.length < 3) {\n throwArgumentDescriptor();\n } else {\n stops = Array.prototype.slice.call(arguments, 1);\n }\n\n switch (directionValue) {\n case 'to bottom':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"0%\" y2=\"100%\"';\n break;\n case 'to right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'to bottom right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"100%\"';\n break;\n case 'to top right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"100%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'ellipse':\n case 'ellipse at center':\n gradientType = 'radial';\n gradientDirectionSvg = 'cx=\"50%\" cy=\"50%\" r=\"75%\"';\n rectangleDimension = 'x=\"-50\" y=\"-50\" width=\"101\" height=\"101\"';\n break;\n default:\n throw { type: 'Argument', message: 'svg-gradient direction must be \\'to bottom\\', \\'to right\\',' +\n ' \\'to bottom right\\', \\'to top right\\' or \\'ellipse at center\\'' };\n }\n returner = `<${gradientType}Gradient id=\"g\" ${gradientDirectionSvg}>`;\n\n for (i = 0; i < stops.length; i += 1) {\n if (stops[i] instanceof Expression) {\n color = stops[i].value[0];\n position = stops[i].value[1];\n } else {\n color = stops[i];\n position = undefined;\n }\n\n if (!(color instanceof Color) || (!((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension))) {\n throwArgumentDescriptor();\n }\n positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%';\n alpha = color.alpha;\n returner += ``;\n }\n returner += ``;\n\n returner = encodeURIComponent(returner);\n\n returner = `data:image/svg+xml,${returner}`;\n return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import contexts from './contexts';\nimport visitor from './visitors';\nimport tree from './tree';\n\nexport default (root, options = {}) => {\n let evaldRoot;\n let variables = options.variables;\n const evalEnv = new contexts.Eval(options);\n\n //\n // Allows setting variables with a hash, so:\n //\n // `{ color: new tree.Color('#f01') }` will become:\n //\n // new tree.Declaration('@color',\n // new tree.Value([\n // new tree.Expression([\n // new tree.Color('#f01')\n // ])\n // ])\n // )\n //\n if (typeof variables === 'object' && !Array.isArray(variables)) {\n variables = Object.keys(variables).map(k => {\n let value = variables[k];\n\n if (!(value instanceof tree.Value)) {\n if (!(value instanceof tree.Expression)) {\n value = new tree.Expression([value]);\n }\n value = new tree.Value([value]);\n }\n return new tree.Declaration(`@${k}`, value, false, null, 0);\n });\n evalEnv.frames = [new tree.Ruleset(null, variables)];\n }\n\n const visitors = [\n new visitor.JoinSelectorVisitor(),\n new visitor.MarkVisibleSelectorsVisitor(true),\n new visitor.ExtendVisitor(),\n new visitor.ToCSSVisitor({compress: Boolean(options.compress)})\n ];\n\n const preEvalVisitors = [];\n let v;\n let visitorIterator;\n\n /**\n * first() / get() allows visitors to be added while visiting\n * \n * @todo Add scoping for visitors just like functions for @plugin; right now they're global\n */\n if (options.pluginManager) {\n visitorIterator = options.pluginManager.visitor();\n for (var i = 0; i < 2; i++) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (v.isPreEvalVisitor) {\n if (i === 0 || preEvalVisitors.indexOf(v) === -1) {\n preEvalVisitors.push(v);\n v.run(root);\n }\n }\n else {\n if (i === 0 || visitors.indexOf(v) === -1) {\n if (v.isPreVisitor) {\n visitors.unshift(v);\n }\n else {\n visitors.push(v);\n }\n }\n }\n }\n }\n }\n\n evaldRoot = root.eval(evalEnv);\n\n for (var i = 0; i < visitors.length; i++) {\n visitors[i].run(evaldRoot);\n }\n\n // Run any remaining visitors added after eval pass\n if (options.pluginManager) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (visitors.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) {\n v.run(evaldRoot);\n }\n }\n }\n\n return evaldRoot;\n};\n","/* global window, XMLHttpRequest */\n\nimport AbstractFileManager from '../less/environment/abstract-file-manager.js';\n\nlet options;\nlet logger;\nlet fileCache = {};\n\n// TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load\nclass FileManager extends AbstractFileManager {\n alwaysMakePathsAbsolute() {\n return true;\n }\n\n join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return this.extractUrlParts(laterPath, basePath).path;\n }\n\n doXHR(url, type, callback, errback) {\n const xhr = new XMLHttpRequest();\n const async = options.isFileProtocol ? options.fileAsync : true;\n\n if (typeof xhr.overrideMimeType === 'function') {\n xhr.overrideMimeType('text/css');\n }\n logger.debug(`XHR: Getting '${url}'`);\n xhr.open('GET', url, async);\n xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');\n xhr.send(null);\n\n function handleResponse(xhr, callback, errback) {\n if (xhr.status >= 200 && xhr.status < 300) {\n callback(xhr.responseText,\n xhr.getResponseHeader('Last-Modified'));\n } else if (typeof errback === 'function') {\n errback(xhr.status, url);\n }\n }\n\n if (options.isFileProtocol && !options.fileAsync) {\n if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {\n callback(xhr.responseText);\n } else {\n errback(xhr.status, url);\n }\n } else if (async) {\n xhr.onreadystatechange = () => {\n if (xhr.readyState == 4) {\n handleResponse(xhr, callback, errback);\n }\n };\n } else {\n handleResponse(xhr, callback, errback);\n }\n }\n\n supports() {\n return true;\n }\n\n clearFileCache() {\n fileCache = {};\n }\n\n loadFile(filename, currentDirectory, options, environment) {\n // TODO: Add prefix support like less-node?\n // What about multiple paths?\n\n if (currentDirectory && !this.isPathAbsolute(filename)) {\n filename = currentDirectory + filename;\n }\n\n filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename;\n\n options = options || {};\n\n // sheet may be set to the stylesheet for the initial load or a collection of properties including\n // some context variables for imports\n const hrefParts = this.extractUrlParts(filename, window.location.href);\n const href = hrefParts.url;\n const self = this;\n \n return new Promise((resolve, reject) => {\n if (options.useFileCache && fileCache[href]) {\n try {\n const lessText = fileCache[href];\n return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }});\n } catch (e) {\n return reject({ filename: href, message: `Error loading file ${href} error was ${e.message}` });\n }\n }\n\n self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) {\n // per file cache\n fileCache[href] = data;\n\n // Use remote copy (re-parse)\n resolve({ contents: data, filename: href, webInfo: { lastModified }});\n }, function doXHRError(status, url) {\n reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href });\n });\n });\n }\n}\n\nexport default (opts, log) => {\n options = opts;\n logger = log;\n return FileManager;\n}\n","import data from './data';\nimport tree from './tree';\nimport Environment from './environment/environment';\nimport AbstractFileManager from './environment/abstract-file-manager';\nimport AbstractPluginLoader from './environment/abstract-plugin-loader';\nimport visitors from './visitors';\nimport Parser from './parser/parser';\nimport Functions from './functions';\nimport contexts from './contexts';\nimport sourceMapOutput from './source-map-output';\nimport sourceMapBuilder from './source-map-builder';\nimport parseTree from './parse-tree';\nimport importManager from './import-manager';\nimport Render from './render';\nimport Parse from './parse';\nimport LessError from './less-error';\nimport transformTree from './transform-tree';\nimport * as utils from './utils';\nimport PluginManager from './plugin-manager';\nimport logger from './logger';\n\nexport default (environment, fileManagers) => {\n /**\n * @todo\n * This original code could be improved quite a bit.\n * Many classes / modules currently add side-effects / mutations to passed in objects,\n * which makes it hard to refactor and reason about. \n */\n environment = new Environment(environment, fileManagers);\n\n const SourceMapOutput = sourceMapOutput(environment);\n const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment);\n const ParseTree = parseTree(SourceMapBuilder);\n const ImportManager = importManager(environment);\n const render = Render(environment, ParseTree, ImportManager);\n const parse = Parse(environment, ParseTree, ImportManager);\n const functions = Functions(environment);\n\n /**\n * @todo\n * This root properties / methods need to be organized.\n * It's not clear what should / must be public and why.\n */\n const initial = {\n version: [3, 10, 0],\n data,\n tree,\n Environment,\n AbstractFileManager,\n AbstractPluginLoader,\n environment,\n visitors,\n Parser,\n functions,\n contexts,\n SourceMapOutput,\n SourceMapBuilder,\n ParseTree,\n ImportManager,\n render,\n parse,\n LessError,\n transformTree,\n utils,\n PluginManager,\n logger\n };\n\n // Create a public API\n const ctor = t => function (...args) {\n return new t(...args);\n };\n\n let t;\n const api = Object.create(initial);\n for (const n in initial.tree) {\n /* eslint guard-for-in: 0 */\n t = initial.tree[n];\n if (typeof t === 'function') {\n api[n.toLowerCase()] = ctor(t);\n }\n else {\n api[n] = Object.create(null);\n for (const o in t) {\n /* eslint guard-for-in: 0 */\n api[n][o.toLowerCase()] = ctor(t[o]);\n }\n }\n }\n\n return api;\n};\n","export default environment => {\n class SourceMapOutput {\n constructor(options) {\n this._css = [];\n this._rootNode = options.rootNode;\n this._contentsMap = options.contentsMap;\n this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap;\n if (options.sourceMapFilename) {\n this._sourceMapFilename = options.sourceMapFilename.replace(/\\\\/g, '/');\n }\n this._outputFilename = options.outputFilename;\n this.sourceMapURL = options.sourceMapURL;\n if (options.sourceMapBasepath) {\n this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\\\/g, '/');\n }\n if (options.sourceMapRootpath) {\n this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\\\/g, '/');\n if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') {\n this._sourceMapRootpath += '/';\n }\n } else {\n this._sourceMapRootpath = '';\n }\n this._outputSourceFiles = options.outputSourceFiles;\n this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator();\n\n this._lineNumber = 0;\n this._column = 0;\n }\n\n removeBasepath(path) {\n if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) {\n path = path.substring(this._sourceMapBasepath.length);\n if (path.charAt(0) === '\\\\' || path.charAt(0) === '/') {\n path = path.substring(1);\n }\n }\n\n return path;\n }\n\n normalizeFilename(filename) {\n filename = filename.replace(/\\\\/g, '/');\n filename = this.removeBasepath(filename);\n return (this._sourceMapRootpath || '') + filename;\n }\n\n add(chunk, fileInfo, index, mapLines) {\n // ignore adding empty strings\n if (!chunk) {\n return;\n }\n\n let lines;\n let sourceLines;\n let columns;\n let sourceColumns;\n let i;\n\n if (fileInfo && fileInfo.filename) {\n let inputSource = this._contentsMap[fileInfo.filename];\n\n // remove vars/banner added to the top of the file\n if (this._contentsIgnoredCharsMap[fileInfo.filename]) {\n // adjust the index\n index -= this._contentsIgnoredCharsMap[fileInfo.filename];\n if (index < 0) { index = 0; }\n // adjust the source\n inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]);\n }\n\n // ignore empty content\n if (inputSource === undefined) {\n return;\n }\n\n inputSource = inputSource.substring(0, index);\n sourceLines = inputSource.split('\\n');\n sourceColumns = sourceLines[sourceLines.length - 1];\n }\n\n lines = chunk.split('\\n');\n columns = lines[lines.length - 1];\n\n if (fileInfo && fileInfo.filename) {\n if (!mapLines) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column},\n original: { line: sourceLines.length, column: sourceColumns.length},\n source: this.normalizeFilename(fileInfo.filename)});\n } else {\n for (i = 0; i < lines.length; i++) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0},\n original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0},\n source: this.normalizeFilename(fileInfo.filename)});\n }\n }\n }\n\n if (lines.length === 1) {\n this._column += columns.length;\n } else {\n this._lineNumber += lines.length - 1;\n this._column = columns.length;\n }\n\n this._css.push(chunk);\n }\n\n isEmpty() {\n return this._css.length === 0;\n }\n\n toCSS(context) {\n this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null });\n\n if (this._outputSourceFiles) {\n for (const filename in this._contentsMap) {\n if (this._contentsMap.hasOwnProperty(filename)) {\n let source = this._contentsMap[filename];\n if (this._contentsIgnoredCharsMap[filename]) {\n source = source.slice(this._contentsIgnoredCharsMap[filename]);\n }\n this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source);\n }\n }\n }\n\n this._rootNode.genCSS(context, this);\n\n if (this._css.length > 0) {\n let sourceMapURL;\n const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON());\n\n if (this.sourceMapURL) {\n sourceMapURL = this.sourceMapURL;\n } else if (this._sourceMapFilename) {\n sourceMapURL = this._sourceMapFilename;\n }\n this.sourceMapURL = sourceMapURL;\n\n this.sourceMap = sourceMapContent;\n }\n\n return this._css.join('');\n }\n }\n\n return SourceMapOutput;\n};\n","export default (SourceMapOutput, environment) => {\n class SourceMapBuilder {\n constructor(options) {\n this.options = options;\n }\n\n toCSS(rootNode, options, imports) {\n const sourceMapOutput = new SourceMapOutput(\n {\n contentsIgnoredCharsMap: imports.contentsIgnoredChars,\n rootNode,\n contentsMap: imports.contents,\n sourceMapFilename: this.options.sourceMapFilename,\n sourceMapURL: this.options.sourceMapURL,\n outputFilename: this.options.sourceMapOutputFilename,\n sourceMapBasepath: this.options.sourceMapBasepath,\n sourceMapRootpath: this.options.sourceMapRootpath,\n outputSourceFiles: this.options.outputSourceFiles,\n sourceMapGenerator: this.options.sourceMapGenerator,\n sourceMapFileInline: this.options.sourceMapFileInline\n });\n\n const css = sourceMapOutput.toCSS(options);\n this.sourceMap = sourceMapOutput.sourceMap;\n this.sourceMapURL = sourceMapOutput.sourceMapURL;\n if (this.options.sourceMapInputFilename) {\n this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename);\n }\n if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) {\n this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL);\n }\n return css + this.getCSSAppendage();\n }\n\n getCSSAppendage() {\n\n let sourceMapURL = this.sourceMapURL;\n if (this.options.sourceMapFileInline) {\n if (this.sourceMap === undefined) {\n return '';\n }\n sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`;\n }\n\n if (sourceMapURL) {\n return `/*# sourceMappingURL=${sourceMapURL} */`;\n }\n return '';\n }\n\n getExternalSourceMap() {\n return this.sourceMap;\n }\n\n setExternalSourceMap(sourceMap) {\n this.sourceMap = sourceMap;\n }\n\n isInline() {\n return this.options.sourceMapFileInline;\n }\n\n getSourceMapURL() {\n return this.sourceMapURL;\n }\n\n getOutputFilename() {\n return this.options.sourceMapOutputFilename;\n }\n\n getInputFilename() {\n return this.sourceMapInputFilename;\n }\n }\n\n return SourceMapBuilder;\n};\n","import LessError from './less-error';\nimport transformTree from './transform-tree';\nimport logger from './logger';\n\nexport default SourceMapBuilder => {\n class ParseTree {\n constructor(root, imports) {\n this.root = root;\n this.imports = imports;\n }\n\n toCSS(options) {\n let evaldRoot;\n const result = {};\n let sourceMapBuilder;\n try {\n evaldRoot = transformTree(this.root, options);\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n try {\n const compress = Boolean(options.compress);\n if (compress) {\n logger.warn('The compress option has been deprecated. ' + \n 'We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.');\n }\n\n const toCSSOptions = {\n compress,\n dumpLineNumbers: options.dumpLineNumbers,\n strictUnits: Boolean(options.strictUnits),\n numPrecision: 8};\n\n if (options.sourceMap) {\n sourceMapBuilder = new SourceMapBuilder(options.sourceMap);\n result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports);\n } else {\n result.css = evaldRoot.toCSS(toCSSOptions);\n }\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n if (options.pluginManager) {\n const postProcessors = options.pluginManager.getPostProcessors();\n for (let i = 0; i < postProcessors.length; i++) {\n result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options, imports: this.imports });\n }\n }\n if (options.sourceMap) {\n result.map = sourceMapBuilder.getExternalSourceMap();\n }\n\n result.imports = [];\n for (const file in this.imports.files) {\n if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) {\n result.imports.push(file);\n }\n }\n return result;\n }\n }\n\n return ParseTree;\n};\n","import contexts from './contexts';\nimport Parser from './parser/parser';\nimport LessError from './less-error';\nimport * as utils from './utils';\nimport logger from './logger';\n\nexport default environment => {\n // FileInfo = {\n // 'rewriteUrls' - option - whether to adjust URL's to be relative\n // 'filename' - full resolved filename of current file\n // 'rootpath' - path to append to normal URLs for this node\n // 'currentDirectory' - path to the current file, absolute\n // 'rootFilename' - filename of the base file\n // 'entryPath' - absolute path to the entry file\n // 'reference' - whether the file should not be output and only output parts that are referenced\n\n class ImportManager {\n constructor(less, context, rootFileInfo) {\n this.less = less;\n this.rootFilename = rootFileInfo.filename;\n this.paths = context.paths || []; // Search paths, when importing\n this.contents = {}; // map - filename to contents of all the files\n this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore\n this.mime = context.mime;\n this.error = null;\n this.context = context;\n // Deprecated? Unused outside of here, could be useful.\n this.queue = []; // Files which haven't been imported yet\n this.files = {}; // Holds the imported parse trees.\n }\n\n /**\n * Add an import to be imported\n * @param path - the raw path\n * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension)\n * @param currentFileInfo - the current file info (used for instance to work out relative paths)\n * @param importOptions - import options\n * @param callback - callback for when it is imported\n */\n push(path, tryAppendExtension, currentFileInfo, importOptions, callback) {\n const importManager = this;\n const pluginLoader = this.context.pluginManager.Loader;\n\n this.queue.push(path);\n\n const fileParsedFunc = (e, root, fullPath) => {\n importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue\n\n const importedEqualsRoot = fullPath === importManager.rootFilename;\n if (importOptions.optional && e) {\n callback(null, {rules:[]}, false, null);\n logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`);\n }\n else {\n // Inline imports aren't cached here.\n // If we start to cache them, please make sure they won't conflict with non-inline imports of the\n // same name as they used to do before this comment and the condition below have been added.\n if (!importManager.files[fullPath] && !importOptions.inline) {\n importManager.files[fullPath] = { root, options: importOptions };\n }\n if (e && !importManager.error) { importManager.error = e; }\n callback(e, root, importedEqualsRoot, fullPath);\n }\n };\n\n const newFileInfo = {\n rewriteUrls: this.context.rewriteUrls,\n entryPath: currentFileInfo.entryPath,\n rootpath: currentFileInfo.rootpath,\n rootFilename: currentFileInfo.rootFilename\n };\n\n const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment);\n\n if (!fileManager) {\n fileParsedFunc({ message: `Could not find a file-manager for ${path}` });\n return;\n }\n\n const loadFileCallback = loadedFile => {\n let plugin;\n const resolvedFilename = loadedFile.filename;\n const contents = loadedFile.contents.replace(/^\\uFEFF/, '');\n\n // Pass on an updated rootpath if path of imported file is relative and file\n // is in a (sub|sup) directory\n //\n // Examples:\n // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/',\n // then rootpath should become 'less/module/nav/'\n // - If path of imported file is '../mixins.less' and rootpath is 'less/',\n // then rootpath should become 'less/../'\n newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename);\n if (newFileInfo.rewriteUrls) {\n newFileInfo.rootpath = fileManager.join(\n (importManager.context.rootpath || ''),\n fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath));\n\n if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) {\n newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath);\n }\n }\n newFileInfo.filename = resolvedFilename;\n\n const newEnv = new contexts.Parse(importManager.context);\n\n newEnv.processImports = false;\n importManager.contents[resolvedFilename] = contents;\n\n if (currentFileInfo.reference || importOptions.reference) {\n newFileInfo.reference = true;\n }\n\n if (importOptions.isPlugin) {\n plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo);\n if (plugin instanceof LessError) {\n fileParsedFunc(plugin, null, resolvedFilename);\n }\n else {\n fileParsedFunc(null, plugin, resolvedFilename);\n }\n } else if (importOptions.inline) {\n fileParsedFunc(null, contents, resolvedFilename);\n } else {\n\n // import (multiple) parse trees apparently get altered and can't be cached.\n // TODO: investigate why this is\n if (importManager.files[resolvedFilename]\n && !importManager.files[resolvedFilename].options.multiple\n && !importOptions.multiple) {\n\n fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename);\n }\n else {\n new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => {\n fileParsedFunc(e, root, resolvedFilename);\n });\n }\n }\n };\n let promise;\n const context = utils.clone(this.context);\n\n if (tryAppendExtension) {\n context.ext = importOptions.isPlugin ? '.js' : '.less';\n }\n\n if (importOptions.isPlugin) {\n context.mime = 'application/javascript';\n promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager);\n }\n else {\n promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment,\n (err, loadedFile) => {\n if (err) {\n fileParsedFunc(err);\n } else {\n loadFileCallback(loadedFile);\n }\n });\n }\n if (promise) {\n promise.then(loadFileCallback, fileParsedFunc);\n }\n }\n }\n\n return ImportManager;\n};\n","let PromiseConstructor;\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const render = function (input, options, callback) {\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n render.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n this.parse(input, options, (err, root, imports, options) => {\n if (err) { return callback(err); }\n\n let result;\n try {\n const parseTree = new ParseTree(root, imports);\n result = parseTree.toCSS(options);\n }\n catch (err) { return callback(err); }\n\n callback(null, result);\n });\n }\n };\n\n return render;\n};\n","let PromiseConstructor;\nimport contexts from './contexts';\nimport Parser from './parser/parser';\nimport PluginManager from './plugin-manager';\nimport LessError from './less-error';\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const parse = function (input, options, callback) {\n\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n parse.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n let context;\n let rootFileInfo;\n const pluginManager = new PluginManager(this, !options.reUsePluginManager);\n\n options.pluginManager = pluginManager;\n\n context = new contexts.Parse(options);\n\n if (options.rootFileInfo) {\n rootFileInfo = options.rootFileInfo;\n } else {\n const filename = options.filename || 'input';\n const entryPath = filename.replace(/[^\\/\\\\]*$/, '');\n rootFileInfo = {\n filename,\n rewriteUrls: context.rewriteUrls,\n rootpath: context.rootpath || '',\n currentDirectory: entryPath,\n entryPath,\n rootFilename: filename\n };\n // add in a missing trailing slash\n if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') {\n rootFileInfo.rootpath += '/';\n }\n }\n\n const imports = new ImportManager(this, context, rootFileInfo);\n this.importManager = imports;\n\n // TODO: allow the plugins to be just a list of paths or names\n // Do an async plugin queue like lessc\n\n if (options.plugins) {\n options.plugins.forEach(plugin => {\n let evalResult;\n let contents;\n if (plugin.fileContent) {\n contents = plugin.fileContent.replace(/^\\uFEFF/, '');\n evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename);\n if (evalResult instanceof LessError) {\n return callback(evalResult);\n }\n }\n else {\n pluginManager.addPlugin(plugin);\n }\n });\n }\n\n new Parser(context, imports, rootFileInfo)\n .parse(input, (e, root) => {\n if (e) { return callback(e); }\n callback(null, root, imports, options);\n }, options);\n }\n };\n return parse;\n};\n","// TODO: Add tests for browser @plugin\n/* global window */\n\nimport AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js';\n\n/**\n * Browser Plugin Loader\n */\nclass PluginLoader extends AbstractPluginLoader {\n constructor(less) {\n super();\n\n this.less = less;\n // Should we shim this.require for browser? Probably not?\n }\n\n loadPlugin(filename, basePath, context, environment, fileManager) {\n return new Promise((fulfill, reject) => {\n fileManager.loadFile(filename, basePath, context, environment)\n .then(fulfill).catch(reject);\n });\n }\n}\n\nexport default PluginLoader;\n\n","import * as utils from './utils';\nimport browser from './browser';\n\nexport default (window, less, options) => {\n\n function errorHTML(e, rootHref) {\n const id = `less-error-message:${utils.extractId(rootHref || '')}`;\n const template = '
      • {content}
        • ';\n const elem = window.document.createElement('div');\n let timer;\n let content;\n const errors = [];\n const filename = e.filename || rootHref;\n const filenameNoPath = filename.match(/([^\\/]+(\\?.*)?)$/)[1];\n\n elem.id = id;\n elem.className = 'less-error-message';\n\n content = `

        ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}` + \n `

        in ${filenameNoPath} `;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += `on line ${e.line}, column ${e.column + 1}:

          ${errors.join('')}
        `;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `
        Stack Trace
        ${e.stack.split('\\n').slice(1).join('
        ')}`;\n }\n elem.innerHTML = content;\n\n // CSS for error messages\n browser.createCSS(window.document, [\n '.less-error-message ul, .less-error-message li {',\n 'list-style-type: none;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message label {',\n 'font-size: 12px;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'color: #cc7777;',\n '}',\n '.less-error-message pre {',\n 'color: #dd6666;',\n 'padding: 4px 0;',\n 'margin: 0;',\n 'display: inline-block;',\n '}',\n '.less-error-message pre.line {',\n 'color: #ff0000;',\n '}',\n '.less-error-message h3 {',\n 'font-size: 20px;',\n 'font-weight: bold;',\n 'padding: 15px 0 5px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message a {',\n 'color: #10a',\n '}',\n '.less-error-message .error {',\n 'color: red;',\n 'font-weight: bold;',\n 'padding-bottom: 2px;',\n 'border-bottom: 1px dashed red;',\n '}'\n ].join('\\n'), { title: 'error-message' });\n\n elem.style.cssText = [\n 'font-family: Arial, sans-serif',\n 'border: 1px solid #e00',\n 'background-color: #eee',\n 'border-radius: 5px',\n '-webkit-border-radius: 5px',\n '-moz-border-radius: 5px',\n 'color: #e00',\n 'padding: 15px',\n 'margin-bottom: 15px'\n ].join(';');\n\n if (options.env === 'development') {\n timer = setInterval(() => {\n const document = window.document;\n const body = document.body;\n if (body) {\n if (document.getElementById(id)) {\n body.replaceChild(elem, document.getElementById(id));\n } else {\n body.insertBefore(elem, body.firstChild);\n }\n clearInterval(timer);\n }\n }, 10);\n }\n }\n\n function removeErrorHTML(path) {\n const node = window.document.getElementById(`less-error-message:${utils.extractId(path)}`);\n if (node) {\n node.parentNode.removeChild(node);\n }\n }\n\n function removeErrorConsole(path) {\n // no action\n }\n\n function removeError(path) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n removeErrorHTML(path);\n } else if (options.errorReporting === 'console') {\n removeErrorConsole(path);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('remove', path);\n }\n }\n\n function errorConsole(e, rootHref) {\n const template = '{line} {content}';\n const filename = e.filename || rootHref;\n const errors = [];\n let content = `${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'} in ${filename}`;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += ` on line ${e.line}, column ${e.column + 1}:\\n${errors.join('\\n')}`;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `\\nStack Trace\\n${e.stack}`;\n }\n less.logger.error(content);\n }\n\n function error(e, rootHref) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n errorHTML(e, rootHref);\n } else if (options.errorReporting === 'console') {\n errorConsole(e, rootHref);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('add', e, rootHref);\n }\n }\n\n return {\n add: error,\n remove: removeError\n };\n};\n","/**\n * Kicks off less and compiles any stylesheets\n * used in the browser distributed version of less\n * to kick-start less using the browser api\n */\n/* global window, document */\n\nimport defaultOptions from '../less/default-options';\nimport addDefaultOptions from './add-default-options';\nimport root from './index';\n\nconst options = defaultOptions();\n\nif (window.less) {\n for (const key in window.less) {\n if (window.less.hasOwnProperty(key)) {\n options[key] = window.less[key];\n }\n }\n}\naddDefaultOptions(window, options);\n\noptions.plugins = options.plugins || [];\n\nif (window.LESS_PLUGINS) {\n options.plugins = options.plugins.concat(window.LESS_PLUGINS);\n}\n\nconst less = root(window, options);\nexport default less;\n\nwindow.less = less;\n\nlet css;\nlet head;\nlet style;\n\n// Always restore page visibility\nfunction resolveOrReject(data) {\n if (data.filename) {\n console.warn(data);\n }\n if (!options.async) {\n head.removeChild(style);\n }\n}\n\nif (options.onReady) {\n if (/!watch/.test(window.location.hash)) {\n less.watch();\n }\n // Simulate synchronous stylesheet loading by hiding page rendering\n if (!options.async) {\n css = 'body { display: none !important }';\n head = document.head || document.getElementsByTagName('head')[0];\n style = document.createElement('style');\n\n style.type = 'text/css';\n if (style.styleSheet) {\n style.styleSheet.cssText = css;\n } else {\n style.appendChild(document.createTextNode(css));\n }\n\n head.appendChild(style);\n }\n less.registerStylesheetsImmediately();\n less.pageLoadFinished = less.refresh(less.env === 'development').then(resolveOrReject, resolveOrReject);\n}\n","// Export a new default each time\nexport default () => ({\n /* Inline Javascript - @plugin still allowed */\n javascriptEnabled: false,\n\n /* Outputs a makefile import dependency list to stdout. */\n depends: false,\n\n /* (DEPRECATED) Compress using less built-in compression. \n * This does an okay job but does not utilise all the tricks of \n * dedicated css compression. */\n compress: false,\n\n /* Runs the less parser and just reports errors without any output. */\n lint: false,\n\n /* Sets available include paths.\n * If the file in an @import rule does not exist at that exact location, \n * less will look for it at the location(s) passed to this option. \n * You might use this for instance to specify a path to a library which \n * you want to be referenced simply and relatively in the less files. */\n paths: [],\n\n /* color output in the terminal */\n color: true,\n\n /* The strictImports controls whether the compiler will allow an @import inside of either \n * @media blocks or (a later addition) other selector blocks.\n * See: https://github.com/less/less.js/issues/656 */\n strictImports: false,\n\n /* Allow Imports from Insecure HTTPS Hosts */\n insecure: false,\n\n /* Allows you to add a path to every generated import and url in your css. \n * This does not affect less import statements that are processed, just ones \n * that are left in the output css. */\n rootpath: '',\n\n /* By default URLs are kept as-is, so if you import a file in a sub-directory \n * that references an image, exactly the same URL will be output in the css. \n * This option allows you to re-write URL's in imported files so that the \n * URL is always relative to the base imported file */\n rewriteUrls: false,\n\n /* How to process math \n * 0 always - 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function extractId(href) {\n return href.replace(/^[a-z-]+:\\/+?[^\\/]+/, '') // Remove protocol & domain\n .replace(/[\\?\\&]livereload=\\w+/, '') // Remove LiveReload cachebuster\n .replace(/^\\//, '') // Remove root /\n .replace(/\\.[a-zA-Z]+$/, '') // Remove simple extension\n .replace(/[^\\.\\w-]+/g, '-') // Replace illegal characters\n .replace(/\\./g, ':'); // Replace dots with colons(for valid id)\n}\n\nexport function addDataAttr(options, tag) {\n for (const opt in tag.dataset) {\n if (tag.dataset.hasOwnProperty(opt)) {\n if (opt === 'env' || opt === 'dumpLineNumbers' || opt === 'rootpath' || opt === 'errorReporting') {\n options[opt] = tag.dataset[opt];\n } else {\n try {\n options[opt] = JSON.parse(tag.dataset[opt]);\n }\n catch (_) {}\n }\n }\n }\n}\n","import * as utils from './utils';\n\nexport default {\n createCSS: function (document, styles, sheet) {\n // Strip the query-string\n const href = sheet.href || '';\n\n // If there is no title set, use the filename, minus the extension\n const id = `less:${sheet.title || utils.extractId(href)}`;\n\n // If this has already been inserted into the DOM, we may need to replace it\n const oldStyleNode = document.getElementById(id);\n let keepOldStyleNode = false;\n\n // Create a new stylesheet node for insertion or (if necessary) replacement\n const styleNode = document.createElement('style');\n styleNode.setAttribute('type', 'text/css');\n if (sheet.media) {\n styleNode.setAttribute('media', sheet.media);\n }\n styleNode.id = id;\n\n if (!styleNode.styleSheet) {\n styleNode.appendChild(document.createTextNode(styles));\n\n // If new contents match contents of oldStyleNode, don't replace oldStyleNode\n keepOldStyleNode = (oldStyleNode !== null && oldStyleNode.childNodes.length > 0 && styleNode.childNodes.length > 0 &&\n oldStyleNode.firstChild.nodeValue === styleNode.firstChild.nodeValue);\n }\n\n const head = document.getElementsByTagName('head')[0];\n\n // If there is no oldStyleNode, just append; otherwise, only append if we need\n // to replace oldStyleNode with an updated stylesheet\n if (oldStyleNode === null || keepOldStyleNode === false) {\n const nextEl = sheet && sheet.nextSibling || null;\n if (nextEl) {\n nextEl.parentNode.insertBefore(styleNode, nextEl);\n } else {\n head.appendChild(styleNode);\n }\n }\n if (oldStyleNode && keepOldStyleNode === false) {\n oldStyleNode.parentNode.removeChild(oldStyleNode);\n }\n\n // For IE.\n // This needs to happen *after* the style element is added to the DOM, otherwise IE 7 and 8 may crash.\n // See http://social.msdn.microsoft.com/Forums/en-US/7e081b65-878a-4c22-8e68-c10d39c2ed32/internet-explorer-crashes-appending-style-element-to-head\n if (styleNode.styleSheet) {\n try {\n styleNode.styleSheet.cssText = styles;\n } catch (e) {\n throw new Error('Couldn\\'t reassign styleSheet.cssText.');\n }\n }\n },\n currentScript: function(window) {\n const document = window.document;\n return document.currentScript || (() => {\n const scripts = document.getElementsByTagName('script');\n return scripts[scripts.length - 1];\n })();\n }\n};\n","export default {\n 'aliceblue':'#f0f8ff',\n 'antiquewhite':'#faebd7',\n 'aqua':'#00ffff',\n 'aquamarine':'#7fffd4',\n 'azure':'#f0ffff',\n 'beige':'#f5f5dc',\n 'bisque':'#ffe4c4',\n 'black':'#000000',\n 'blanchedalmond':'#ffebcd',\n 'blue':'#0000ff',\n 'blueviolet':'#8a2be2',\n 'brown':'#a52a2a',\n 'burlywood':'#deb887',\n 'cadetblue':'#5f9ea0',\n 'chartreuse':'#7fff00',\n 'chocolate':'#d2691e',\n 'coral':'#ff7f50',\n 'cornflowerblue':'#6495ed',\n 'cornsilk':'#fff8dc',\n 'crimson':'#dc143c',\n 'cyan':'#00ffff',\n 'darkblue':'#00008b',\n 'darkcyan':'#008b8b',\n 'darkgoldenrod':'#b8860b',\n 'darkgray':'#a9a9a9',\n 'darkgrey':'#a9a9a9',\n 'darkgreen':'#006400',\n 'darkkhaki':'#bdb76b',\n 'darkmagenta':'#8b008b',\n 'darkolivegreen':'#556b2f',\n 'darkorange':'#ff8c00',\n 'darkorchid':'#9932cc',\n 'darkred':'#8b0000',\n 'darksalmon':'#e9967a',\n 'darkseagreen':'#8fbc8f',\n 'darkslateblue':'#483d8b',\n 'darkslategray':'#2f4f4f',\n 'darkslategrey':'#2f4f4f',\n 'darkturquoise':'#00ced1',\n 'darkviolet':'#9400d3',\n 'deeppink':'#ff1493',\n 'deepskyblue':'#00bfff',\n 'dimgray':'#696969',\n 'dimgrey':'#696969',\n 'dodgerblue':'#1e90ff',\n 'firebrick':'#b22222',\n 'floralwhite':'#fffaf0',\n 'forestgreen':'#228b22',\n 'fuchsia':'#ff00ff',\n 'gainsboro':'#dcdcdc',\n 'ghostwhite':'#f8f8ff',\n 'gold':'#ffd700',\n 'goldenrod':'#daa520',\n 'gray':'#808080',\n 'grey':'#808080',\n 'green':'#008000',\n 'greenyellow':'#adff2f',\n 'honeydew':'#f0fff0',\n 'hotpink':'#ff69b4',\n 'indianred':'#cd5c5c',\n 'indigo':'#4b0082',\n 'ivory':'#fffff0',\n 'khaki':'#f0e68c',\n 'lavender':'#e6e6fa',\n 'lavenderblush':'#fff0f5',\n 'lawngreen':'#7cfc00',\n 'lemonchiffon':'#fffacd',\n 'lightblue':'#add8e6',\n 'lightcoral':'#f08080',\n 'lightcyan':'#e0ffff',\n 'lightgoldenrodyellow':'#fafad2',\n 'lightgray':'#d3d3d3',\n 'lightgrey':'#d3d3d3',\n 'lightgreen':'#90ee90',\n 'lightpink':'#ffb6c1',\n 'lightsalmon':'#ffa07a',\n 'lightseagreen':'#20b2aa',\n 'lightskyblue':'#87cefa',\n 'lightslategray':'#778899',\n 'lightslategrey':'#778899',\n 'lightsteelblue':'#b0c4de',\n 'lightyellow':'#ffffe0',\n 'lime':'#00ff00',\n 'limegreen':'#32cd32',\n 'linen':'#faf0e6',\n 'magenta':'#ff00ff',\n 'maroon':'#800000',\n 'mediumaquamarine':'#66cdaa',\n 'mediumblue':'#0000cd',\n 'mediumorchid':'#ba55d3',\n 'mediumpurple':'#9370d8',\n 'mediumseagreen':'#3cb371',\n 'mediumslateblue':'#7b68ee',\n 'mediumspringgreen':'#00fa9a',\n 'mediumturquoise':'#48d1cc',\n 'mediumvioletred':'#c71585',\n 'midnightblue':'#191970',\n 'mintcream':'#f5fffa',\n 'mistyrose':'#ffe4e1',\n 'moccasin':'#ffe4b5',\n 'navajowhite':'#ffdead',\n 'navy':'#000080',\n 'oldlace':'#fdf5e6',\n 'olive':'#808000',\n 'olivedrab':'#6b8e23',\n 'orange':'#ffa500',\n 'orangered':'#ff4500',\n 'orchid':'#da70d6',\n 'palegoldenrod':'#eee8aa',\n 'palegreen':'#98fb98',\n 'paleturquoise':'#afeeee',\n 'palevioletred':'#d87093',\n 'papayawhip':'#ffefd5',\n 'peachpuff':'#ffdab9',\n 'peru':'#cd853f',\n 'pink':'#ffc0cb',\n 'plum':'#dda0dd',\n 'powderblue':'#b0e0e6',\n 'purple':'#800080',\n 'rebeccapurple':'#663399',\n 'red':'#ff0000',\n 'rosybrown':'#bc8f8f',\n 'royalblue':'#4169e1',\n 'saddlebrown':'#8b4513',\n 'salmon':'#fa8072',\n 'sandybrown':'#f4a460',\n 'seagreen':'#2e8b57',\n 'seashell':'#fff5ee',\n 'sienna':'#a0522d',\n 'silver':'#c0c0c0',\n 'skyblue':'#87ceeb',\n 'slateblue':'#6a5acd',\n 'slategray':'#708090',\n 'slategrey':'#708090',\n 'snow':'#fffafa',\n 'springgreen':'#00ff7f',\n 'steelblue':'#4682b4',\n 'tan':'#d2b48c',\n 'teal':'#008080',\n 'thistle':'#d8bfd8',\n 'tomato':'#ff6347',\n 'turquoise':'#40e0d0',\n 'violet':'#ee82ee',\n 'wheat':'#f5deb3',\n 'white':'#ffffff',\n 'whitesmoke':'#f5f5f5',\n 'yellow':'#ffff00',\n 'yellowgreen':'#9acd32'\n};","export default {\n length: {\n 'm': 1,\n 'cm': 0.01,\n 'mm': 0.001,\n 'in': 0.0254,\n 'px': 0.0254 / 96,\n 'pt': 0.0254 / 72,\n 'pc': 0.0254 / 72 * 12\n },\n duration: {\n 's': 1,\n 'ms': 0.001\n },\n angle: {\n 'rad': 1 / (2 * Math.PI),\n 'deg': 1 / 360,\n 'grad': 1 / 400,\n 'turn': 1\n }\n};","import colors from './colors';\nimport unitConversions from './unit-conversions';\n\nexport default { colors, unitConversions };\n","class Node {\n constructor() {\n this.parent = null;\n this.visibilityBlocks = undefined;\n this.nodeVisible = undefined;\n this.rootNode = null;\n this.parsed = null;\n\n const self = this;\n Object.defineProperty(this, 'currentFileInfo', {\n get: function() { return self.fileInfo(); }\n });\n Object.defineProperty(this, 'index', {\n get: function() { return self.getIndex(); }\n });\n\n }\n\n setParent(nodes, parent) {\n function set(node) {\n if (node && node instanceof Node) {\n node.parent = parent;\n }\n }\n if (Array.isArray(nodes)) {\n nodes.forEach(set);\n }\n else {\n set(nodes);\n }\n }\n\n getIndex() {\n return this._index || (this.parent && this.parent.getIndex()) || 0;\n }\n\n fileInfo() {\n return this._fileInfo || (this.parent && this.parent.fileInfo()) || {};\n }\n\n isRulesetLike() {\n return false;\n }\n\n toCSS(context) {\n const strs = [];\n this.genCSS(context, {\n add: function(chunk, fileInfo, index) {\n strs.push(chunk);\n },\n isEmpty: function () {\n return strs.length === 0;\n }\n });\n return strs.join('');\n }\n\n genCSS(context, output) {\n output.add(this.value);\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval() { return this; }\n\n _operate(context, op, a, b) {\n switch (op) {\n case '+': return a + b;\n case '-': return a - b;\n case '*': return a * b;\n case '/': return a / b;\n }\n }\n\n fround(context, value) {\n const precision = context && context.numPrecision;\n // add \"epsilon\" to ensure numbers like 1.000000005 (represented as 1.000000004999...) are properly rounded:\n return (precision) ? Number((value + 2e-16).toFixed(precision)) : value;\n }\n\n // Returns true if this node represents root of ast imported by reference\n blocksVisibility() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n return this.visibilityBlocks !== 0;\n }\n\n addVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks + 1;\n }\n\n removeVisibilityBlock() {\n if (this.visibilityBlocks == null) {\n this.visibilityBlocks = 0;\n }\n this.visibilityBlocks = this.visibilityBlocks - 1;\n }\n\n // Turns on node visibility - if called node will be shown in output regardless\n // of whether it comes from import by reference or not\n ensureVisibility() {\n this.nodeVisible = true;\n }\n\n // Turns off node visibility - if called node will NOT be shown in output regardless\n // of whether it comes from import by reference or not\n ensureInvisibility() {\n this.nodeVisible = false;\n }\n\n // return values:\n // false - the node must not be visible\n // true - the node must be visible\n // undefined or null - the node has the same visibility as its parent\n isVisible() {\n return this.nodeVisible;\n }\n\n visibilityInfo() {\n return {\n visibilityBlocks: this.visibilityBlocks,\n nodeVisible: this.nodeVisible\n };\n }\n\n copyVisibilityInfo(info) {\n if (!info) {\n return;\n }\n this.visibilityBlocks = info.visibilityBlocks;\n this.nodeVisible = info.nodeVisible;\n }\n}\n\nNode.compare = (a, b) => {\n /* returns:\n -1: a < b\n 0: a = b\n 1: a > b\n and *any* other value for a != b (e.g. undefined, NaN, -2 etc.) */\n\n if ((a.compare) &&\n // for \"symmetric results\" force toCSS-based comparison\n // of Quoted or Anonymous if either value is one of those\n !(b.type === 'Quoted' || b.type === 'Anonymous')) {\n return a.compare(b);\n } else if (b.compare) {\n return -b.compare(a);\n } else if (a.type !== b.type) {\n return undefined;\n }\n\n a = a.value;\n b = b.value;\n if (!Array.isArray(a)) {\n return a === b ? 0 : undefined;\n }\n if (a.length !== b.length) {\n return undefined;\n }\n for (let i = 0; i < a.length; i++) {\n if (Node.compare(a[i], b[i]) !== 0) {\n return undefined;\n }\n }\n return 0;\n};\n\nNode.numericCompare = (a, b) => a < b ? -1\n : a === b ? 0\n : a > b ? 1 : undefined;\nexport default Node;\n","import Node from './node';\nimport colors from '../data/colors';\n\n//\n// RGB Colors - #ff0014, #eee\n//\nclass Color extends Node {\n constructor(rgb, a, originalForm) {\n super();\n\n const self = this;\n //\n // The end goal here, is to parse the arguments\n // into an integer triplet, such as `128, 255, 0`\n //\n // This facilitates operations and conversions.\n //\n if (Array.isArray(rgb)) {\n this.rgb = rgb;\n } else if (rgb.length >= 6) {\n this.rgb = [];\n rgb.match(/.{2}/g).map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c, 16));\n } else {\n self.alpha = (parseInt(c, 16)) / 255;\n }\n });\n } else {\n this.rgb = [];\n rgb.split('').map((c, i) => {\n if (i < 3) {\n self.rgb.push(parseInt(c + c, 16));\n } else {\n self.alpha = (parseInt(c + c, 16)) / 255;\n }\n });\n }\n this.alpha = this.alpha || (typeof a === 'number' ? a : 1);\n if (typeof originalForm !== 'undefined') {\n this.value = originalForm;\n }\n }\n\n luma() {\n let r = this.rgb[0] / 255;\n let g = this.rgb[1] / 255;\n let b = this.rgb[2] / 255;\n\n r = (r <= 0.03928) ? r / 12.92 : Math.pow(((r + 0.055) / 1.055), 2.4);\n g = (g <= 0.03928) ? g / 12.92 : Math.pow(((g + 0.055) / 1.055), 2.4);\n b = (b <= 0.03928) ? b / 12.92 : Math.pow(((b + 0.055) / 1.055), 2.4);\n\n return 0.2126 * r + 0.7152 * g + 0.0722 * b;\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context, doNotCompress) {\n const compress = context && context.compress && !doNotCompress;\n let color;\n let alpha;\n let colorFunction;\n let args = [];\n\n // `value` is set if this color was originally\n // converted from a named color string so we need\n // to respect this and try to output named color too.\n alpha = this.fround(context, this.alpha);\n\n if (this.value) {\n if (this.value.indexOf('rgb') === 0) {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n } else if (this.value.indexOf('hsl') === 0) {\n if (alpha < 1) {\n colorFunction = 'hsla';\n } else {\n colorFunction = 'hsl';\n }\n } else {\n return this.value;\n }\n } else {\n if (alpha < 1) {\n colorFunction = 'rgba';\n }\n }\n\n switch (colorFunction) {\n case 'rgba':\n args = this.rgb.map(c => clamp(Math.round(c), 255)).concat(clamp(alpha, 1));\n break;\n case 'hsla':\n args.push(clamp(alpha, 1));\n case 'hsl':\n color = this.toHSL();\n args = [\n this.fround(context, color.h),\n `${this.fround(context, color.s * 100)}%`,\n `${this.fround(context, color.l * 100)}%`\n ].concat(args);\n }\n\n if (colorFunction) {\n // Values are capped between `0` and `255`, rounded and zero-padded.\n return `${colorFunction}(${args.join(`,${compress ? '' : ' '}`)})`;\n }\n\n color = this.toRGB();\n\n if (compress) {\n const splitcolor = color.split('');\n\n // Convert color to short format\n if (splitcolor[1] === splitcolor[2] && splitcolor[3] === splitcolor[4] && splitcolor[5] === splitcolor[6]) {\n color = `#${splitcolor[1]}${splitcolor[3]}${splitcolor[5]}`;\n }\n }\n\n return color;\n }\n\n //\n // Operations have to be done per-channel, if not,\n // channels will spill onto each other. Once we have\n // our result, in the form of an integer triplet,\n // we create a new Color node to hold the result.\n //\n operate(context, op, other) {\n const rgb = new Array(3);\n const alpha = this.alpha * (1 - other.alpha) + other.alpha;\n for (let c = 0; c < 3; c++) {\n rgb[c] = this._operate(context, op, this.rgb[c], other.rgb[c]);\n }\n return new Color(rgb, alpha);\n }\n\n toRGB() {\n return toHex(this.rgb);\n }\n\n toHSL() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const l = (max + min) / 2;\n const d = max - min;\n\n if (max === min) {\n h = s = 0;\n } else {\n s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, l, a };\n }\n\n // Adapted from http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript\n toHSV() {\n const r = this.rgb[0] / 255;\n const g = this.rgb[1] / 255;\n const b = this.rgb[2] / 255;\n const a = this.alpha;\n const max = Math.max(r, g, b);\n const min = Math.min(r, g, b);\n let h;\n let s;\n const v = max;\n\n const d = max - min;\n if (max === 0) {\n s = 0;\n } else {\n s = d / max;\n }\n\n if (max === min) {\n h = 0;\n } else {\n switch (max) {\n case r: h = (g - b) / d + (g < b ? 6 : 0); break;\n case g: h = (b - r) / d + 2; break;\n case b: h = (r - g) / d + 4; break;\n }\n h /= 6;\n }\n return { h: h * 360, s, v, a };\n }\n\n toARGB() {\n return toHex([this.alpha * 255].concat(this.rgb));\n }\n\n compare(x) {\n return (x.rgb &&\n x.rgb[0] === this.rgb[0] &&\n x.rgb[1] === this.rgb[1] &&\n x.rgb[2] === this.rgb[2] &&\n x.alpha === this.alpha) ? 0 : undefined;\n }\n}\n\nColor.prototype.type = 'Color';\n\nfunction clamp(v, max) {\n return Math.min(Math.max(v, 0), max);\n}\n\nfunction toHex(v) {\n return `#${v.map(c => {\n c = clamp(Math.round(c), 255);\n return (c < 16 ? '0' : '') + c.toString(16);\n }).join('')}`;\n}\n\nColor.fromKeyword = keyword => {\n let c;\n const key = keyword.toLowerCase();\n if (colors.hasOwnProperty(key)) {\n c = new Color(colors[key].slice(1));\n }\n else if (key === 'transparent') {\n c = new Color([0, 0, 0], 0);\n }\n\n if (c) {\n c.value = keyword;\n return c;\n }\n};\nexport default Color;\n","import Node from './node';\n\nclass Paren extends Node {\n constructor(node) {\n super();\n\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n return new Paren(this.value.eval(context));\n }\n}\n\nParen.prototype.type = 'Paren';\nexport default Paren;\n","import Node from './node';\nconst _noSpaceCombinators = {\n '': true,\n ' ': true,\n '|': true\n};\n\nclass Combinator extends Node {\n constructor(value) {\n super();\n\n if (value === ' ') {\n this.value = ' ';\n this.emptyOrWhitespace = true;\n } else {\n this.value = value ? value.trim() : '';\n this.emptyOrWhitespace = this.value === '';\n }\n }\n\n genCSS(context, output) {\n const spaceOrEmpty = (context.compress || _noSpaceCombinators[this.value]) ? '' : ' ';\n output.add(spaceOrEmpty + this.value + spaceOrEmpty);\n }\n}\n\nCombinator.prototype.type = 'Combinator';\n\nexport default Combinator;\n","import Node from './node';\nimport Paren from './paren';\nimport Combinator from './combinator';\n\nclass Element extends Node {\n constructor(combinator, value, isVariable, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.combinator = combinator instanceof Combinator ?\n combinator : new Combinator(combinator);\n\n if (typeof value === 'string') {\n this.value = value.trim();\n } else if (value) {\n this.value = value;\n } else {\n this.value = '';\n }\n this.isVariable = isVariable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.combinator, this);\n }\n\n accept(visitor) {\n const value = this.value;\n this.combinator = visitor.visit(this.combinator);\n if (typeof value === 'object') {\n this.value = visitor.visit(value);\n }\n }\n\n eval(context) {\n return new Element(this.combinator,\n this.value.eval ? this.value.eval(context) : this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n clone() {\n return new Element(this.combinator,\n this.value,\n this.isVariable,\n this.getIndex(),\n this.fileInfo(), this.visibilityInfo());\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context), this.fileInfo(), this.getIndex());\n }\n\n toCSS(context = {}) {\n let value = this.value;\n const firstSelector = context.firstSelector;\n if (value instanceof Paren) {\n // selector in parens should not be affected by outer selector\n // flags (breaks only interpolated selectors - see #1973)\n context.firstSelector = true;\n }\n value = value.toCSS ? value.toCSS(context) : value;\n context.firstSelector = firstSelector;\n if (value === '' && this.combinator.value.charAt(0) === '&') {\n return '';\n } else {\n return this.combinator.toCSS(context) + value;\n }\n }\n}\n\nElement.prototype.type = 'Element';\nexport default Element;\n","\nexport const Math = {\n ALWAYS: 0,\n PARENS_DIVISION: 1,\n PARENS: 2,\n STRICT_LEGACY: 3\n};\n\nexport const RewriteUrls = {\n OFF: 0,\n LOCAL: 1,\n ALL: 2\n};","var clone = (function() {\n'use strict';\n\nfunction _instanceof(obj, type) {\n return type != null && obj instanceof type;\n}\n\nvar nativeMap;\ntry {\n nativeMap = Map;\n} catch(_) {\n // maybe a reference error because no `Map`. Give it a dummy value that no\n // value will ever be an instanceof.\n nativeMap = function() {};\n}\n\nvar nativeSet;\ntry {\n nativeSet = Set;\n} catch(_) {\n nativeSet = function() {};\n}\n\nvar nativePromise;\ntry {\n nativePromise = Promise;\n} catch(_) {\n nativePromise = function() {};\n}\n\n/**\n * Clones (copies) an Object using deep copying.\n *\n * This function supports circular references by default, but if you are certain\n * there are no circular references in your object, you can save some CPU time\n * by calling clone(obj, false).\n *\n * Caution: if `circular` is false and `parent` contains circular references,\n * your program may enter an infinite loop and crash.\n *\n * @param `parent` - the object to be cloned\n * @param `circular` - set to true if the object to be cloned may contain\n * circular references. (optional - true by default)\n * @param `depth` - set to a number if the object is only to be cloned to\n * a particular depth. (optional - defaults to Infinity)\n * @param `prototype` - sets the prototype to be used when cloning an object.\n * (optional - defaults to parent prototype).\n * @param `includeNonEnumerable` - set to true if the non-enumerable properties\n * should be cloned as well. Non-enumerable properties on the prototype\n * chain will be ignored. (optional - false by default)\n*/\nfunction clone(parent, circular, depth, prototype, includeNonEnumerable) {\n if (typeof circular === 'object') {\n depth = circular.depth;\n prototype = circular.prototype;\n includeNonEnumerable = circular.includeNonEnumerable;\n circular = circular.circular;\n }\n // maintain two arrays for circular references, where corresponding parents\n // and children have the same index\n var allParents = [];\n var allChildren = [];\n\n var useBuffer = typeof Buffer != 'undefined';\n\n if (typeof circular == 'undefined')\n circular = true;\n\n if (typeof depth == 'undefined')\n depth = Infinity;\n\n // recurse this function so we don't reset allParents and allChildren\n function _clone(parent, depth) {\n // cloning null always returns null\n if (parent === null)\n return null;\n\n if (depth === 0)\n return parent;\n\n var child;\n var proto;\n if (typeof parent != 'object') {\n return parent;\n }\n\n if (_instanceof(parent, nativeMap)) {\n child = new nativeMap();\n } else if (_instanceof(parent, nativeSet)) {\n child = new nativeSet();\n } else if (_instanceof(parent, nativePromise)) {\n child = new nativePromise(function (resolve, reject) {\n parent.then(function(value) {\n resolve(_clone(value, depth - 1));\n }, function(err) {\n reject(_clone(err, depth - 1));\n });\n });\n } else if (clone.__isArray(parent)) {\n child = [];\n } else if (clone.__isRegExp(parent)) {\n child = new RegExp(parent.source, __getRegExpFlags(parent));\n if (parent.lastIndex) child.lastIndex = parent.lastIndex;\n } else if (clone.__isDate(parent)) {\n child = new Date(parent.getTime());\n } else if (useBuffer && Buffer.isBuffer(parent)) {\n if (Buffer.allocUnsafe) {\n // Node.js >= 4.5.0\n child = Buffer.allocUnsafe(parent.length);\n } else {\n // Older Node.js versions\n child = new Buffer(parent.length);\n }\n parent.copy(child);\n return child;\n } else if (_instanceof(parent, Error)) {\n child = Object.create(parent);\n } else {\n if (typeof prototype == 'undefined') {\n proto = Object.getPrototypeOf(parent);\n child = Object.create(proto);\n }\n else {\n child = Object.create(prototype);\n proto = prototype;\n }\n }\n\n if (circular) {\n var index = allParents.indexOf(parent);\n\n if (index != -1) {\n return allChildren[index];\n }\n allParents.push(parent);\n allChildren.push(child);\n }\n\n if (_instanceof(parent, nativeMap)) {\n parent.forEach(function(value, key) {\n var keyChild = _clone(key, depth - 1);\n var valueChild = _clone(value, depth - 1);\n child.set(keyChild, valueChild);\n });\n }\n if (_instanceof(parent, nativeSet)) {\n parent.forEach(function(value) {\n var entryChild = _clone(value, depth - 1);\n child.add(entryChild);\n });\n }\n\n for (var i in parent) {\n var attrs;\n if (proto) {\n attrs = Object.getOwnPropertyDescriptor(proto, i);\n }\n\n if (attrs && attrs.set == null) {\n continue;\n }\n child[i] = _clone(parent[i], depth - 1);\n }\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(parent);\n for (var i = 0; i < symbols.length; i++) {\n // Don't need to worry about cloning a symbol because it is a primitive,\n // like a number or string.\n var symbol = symbols[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, symbol);\n if (descriptor && !descriptor.enumerable && !includeNonEnumerable) {\n continue;\n }\n child[symbol] = _clone(parent[symbol], depth - 1);\n if (!descriptor.enumerable) {\n Object.defineProperty(child, symbol, {\n enumerable: false\n });\n }\n }\n }\n\n if (includeNonEnumerable) {\n var allPropertyNames = Object.getOwnPropertyNames(parent);\n for (var i = 0; i < allPropertyNames.length; i++) {\n var propertyName = allPropertyNames[i];\n var descriptor = Object.getOwnPropertyDescriptor(parent, propertyName);\n if (descriptor && descriptor.enumerable) {\n continue;\n }\n child[propertyName] = _clone(parent[propertyName], depth - 1);\n Object.defineProperty(child, propertyName, {\n enumerable: false\n });\n }\n }\n\n return child;\n }\n\n return _clone(parent, depth);\n}\n\n/**\n * Simple flat clone using prototype, accepts only objects, usefull for property\n * override on FLAT configuration object (no nested props).\n *\n * USE WITH CAUTION! This may not behave as you wish if you do not know how this\n * works.\n */\nclone.clonePrototype = function clonePrototype(parent) {\n if (parent === null)\n return null;\n\n var c = function () {};\n c.prototype = parent;\n return new c();\n};\n\n// private utility functions\n\nfunction __objToStr(o) {\n return Object.prototype.toString.call(o);\n}\nclone.__objToStr = __objToStr;\n\nfunction __isDate(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Date]';\n}\nclone.__isDate = __isDate;\n\nfunction __isArray(o) {\n return typeof o === 'object' && __objToStr(o) === '[object Array]';\n}\nclone.__isArray = __isArray;\n\nfunction __isRegExp(o) {\n return typeof o === 'object' && __objToStr(o) === '[object RegExp]';\n}\nclone.__isRegExp = __isRegExp;\n\nfunction __getRegExpFlags(re) {\n var flags = '';\n if (re.global) flags += 'g';\n if (re.ignoreCase) flags += 'i';\n if (re.multiline) flags += 'm';\n return flags;\n}\nclone.__getRegExpFlags = __getRegExpFlags;\n\nreturn clone;\n})();\n\nif (typeof module === 'object' && module.exports) {\n module.exports = clone;\n}\n","/* jshint proto: true */\nimport * as Constants from './constants';\nimport CloneHelper from 'clone';\n\nexport function getLocation(index, inputStream) {\n let n = index + 1;\n let line = null;\n let column = -1;\n\n while (--n >= 0 && inputStream.charAt(n) !== '\\n') {\n column++;\n }\n\n if (typeof index === 'number') {\n line = (inputStream.slice(0, index).match(/\\n/g) || '').length;\n }\n\n return {\n line,\n column\n };\n}\n\nexport function copyArray(arr) {\n let i;\n const length = arr.length;\n const copy = new Array(length);\n\n for (i = 0; i < length; i++) {\n copy[i] = arr[i];\n }\n return copy;\n}\n\nexport function clone(obj) {\n const cloned = {};\n for (const prop in obj) {\n if (obj.hasOwnProperty(prop)) {\n cloned[prop] = obj[prop];\n }\n }\n return cloned;\n}\n\nexport function defaults(obj1, obj2) {\n let newObj = obj2 || {};\n if (!obj2._defaults) {\n newObj = {};\n const defaults = CloneHelper(obj1);\n newObj._defaults = defaults;\n const cloned = obj2 ? CloneHelper(obj2) : {};\n Object.assign(newObj, defaults, cloned);\n }\n return newObj;\n}\n\nexport function copyOptions(obj1, obj2) {\n if (obj2 && obj2._defaults) {\n return obj2;\n }\n const opts = defaults(obj1, obj2);\n if (opts.strictMath) {\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n // Back compat with changed relativeUrls option\n if (opts.relativeUrls) {\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n }\n if (typeof opts.math === 'string') {\n switch (opts.math.toLowerCase()) {\n case 'always':\n opts.math = Constants.Math.ALWAYS;\n break;\n case 'parens-division':\n opts.math = Constants.Math.PARENS_DIVISION;\n break;\n case 'strict':\n case 'parens':\n opts.math = Constants.Math.PARENS;\n break;\n case 'strict-legacy':\n opts.math = Constants.Math.STRICT_LEGACY;\n }\n }\n if (typeof opts.rewriteUrls === 'string') {\n switch (opts.rewriteUrls.toLowerCase()) {\n case 'off':\n opts.rewriteUrls = Constants.RewriteUrls.OFF;\n break;\n case 'local':\n opts.rewriteUrls = Constants.RewriteUrls.LOCAL;\n break;\n case 'all':\n opts.rewriteUrls = Constants.RewriteUrls.ALL;\n break;\n }\n }\n return opts;\n}\n\nexport function merge(obj1, obj2) {\n for (const prop in obj2) {\n if (obj2.hasOwnProperty(prop)) {\n obj1[prop] = obj2[prop];\n }\n }\n return obj1;\n}\n\nexport function flattenArray(arr, result = []) {\n for (let i = 0, length = arr.length; i < length; i++) {\n const value = arr[i];\n if (Array.isArray(value)) {\n flattenArray(value, result);\n } else {\n if (value !== undefined) {\n result.push(value);\n }\n }\n }\n return result;\n}","import * as utils from './utils';\n/**\n * This is a centralized class of any error that could be thrown internally (mostly by the parser).\n * Besides standard .message it keeps some additional data like a path to the file where the error\n * occurred along with line and column numbers.\n *\n * @class\n * @extends Error\n * @type {module.LessError}\n *\n * @prop {string} type\n * @prop {string} filename\n * @prop {number} index\n * @prop {number} line\n * @prop {number} column\n * @prop {number} callLine\n * @prop {number} callExtract\n * @prop {string[]} extract\n *\n * @param {Object} e - An error object to wrap around or just a descriptive object\n * @param {Object} fileContentMap - An object with file contents in 'contents' property (like importManager) @todo - move to fileManager?\n * @param {string} [currentFilename]\n */\nconst LessError = function LessError(e, fileContentMap, currentFilename) {\n Error.call(this);\n\n const filename = e.filename || currentFilename;\n\n this.message = e.message;\n this.stack = e.stack;\n\n if (fileContentMap && filename) {\n const input = fileContentMap.contents[filename];\n const loc = utils.getLocation(e.index, input);\n const line = loc.line;\n const col = loc.column;\n const callLine = e.call && utils.getLocation(e.call, input).line;\n const lines = input ? input.split('\\n') : '';\n\n this.type = e.type || 'Syntax';\n this.filename = filename;\n this.index = e.index;\n this.line = typeof line === 'number' ? line + 1 : null;\n this.column = col;\n\n if (!this.line && this.stack) {\n const found = this.stack.match(/(|Function):(\\d+):(\\d+)/);\n\n if (found) {\n if (found[2]) {\n this.line = parseInt(found[2]) - 2;\n }\n if (found[3]) {\n this.column = parseInt(found[3]);\n }\n }\n }\n\n this.callLine = callLine + 1;\n this.callExtract = lines[callLine];\n\n this.extract = [\n lines[this.line - 2],\n lines[this.line - 1],\n lines[this.line]\n ];\n }\n\n};\n\nif (typeof Object.create === 'undefined') {\n const F = () => {};\n F.prototype = Error.prototype;\n LessError.prototype = new F();\n} else {\n LessError.prototype = Object.create(Error.prototype);\n}\n\nLessError.prototype.constructor = LessError;\n\n/**\n * An overridden version of the default Object.prototype.toString\n * which uses additional information to create a helpful message.\n *\n * @param {Object} options\n * @returns {string}\n */\nLessError.prototype.toString = function(options = {}) {\n let message = '';\n const extract = this.extract || [];\n let error = [];\n let stylize = str => str;\n if (options.stylize) {\n const type = typeof options.stylize;\n if (type !== 'function') {\n throw Error(`options.stylize should be a function, got a ${type}!`);\n }\n stylize = options.stylize;\n }\n\n if (this.line !== null) {\n if (typeof extract[0] === 'string') {\n error.push(stylize(`${this.line - 1} ${extract[0]}`, 'grey'));\n }\n\n if (typeof extract[1] === 'string') {\n let errorTxt = `${this.line} `;\n if (extract[1]) {\n errorTxt += extract[1].slice(0, this.column) +\n stylize(stylize(stylize(extract[1].substr(this.column, 1), 'bold') +\n extract[1].slice(this.column + 1), 'red'), 'inverse');\n }\n error.push(errorTxt);\n }\n\n if (typeof extract[2] === 'string') {\n error.push(stylize(`${this.line + 1} ${extract[2]}`, 'grey'));\n }\n error = `${error.join('\\n') + stylize('', 'reset')}\\n`;\n }\n\n message += stylize(`${this.type}Error: ${this.message}`, 'red');\n if (this.filename) {\n message += stylize(' in ', 'red') + this.filename;\n }\n if (this.line) {\n message += stylize(` on line ${this.line}, column ${this.column + 1}:`, 'grey');\n }\n\n message += `\\n${error}`;\n\n if (this.callLine) {\n message += `${stylize('from ', 'red') + (this.filename || '')}/n`;\n message += `${stylize(this.callLine, 'grey')} ${this.callExtract}/n`;\n }\n\n return message;\n};\n\nexport default LessError;","import Node from './node';\nimport Element from './element';\nimport LessError from '../less-error';\n\nclass Selector extends Node {\n constructor(elements, extendList, condition, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.extendList = extendList;\n this.condition = condition;\n this.evaldCondition = !condition;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.elements = this.getElements(elements);\n this.mixinElements_ = undefined;\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.elements, this);\n }\n\n accept(visitor) {\n if (this.elements) {\n this.elements = visitor.visitArray(this.elements);\n }\n if (this.extendList) {\n this.extendList = visitor.visitArray(this.extendList);\n }\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n createDerived(elements, extendList, evaldCondition) {\n elements = this.getElements(elements);\n const newSelector = new Selector(elements, extendList || this.extendList,\n null, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n newSelector.evaldCondition = (evaldCondition != null) ? evaldCondition : this.evaldCondition;\n newSelector.mediaEmpty = this.mediaEmpty;\n return newSelector;\n }\n\n getElements(els) {\n if (!els) {\n return [new Element('', '&', false, this._index, this._fileInfo)];\n }\n if (typeof els === 'string') {\n this.parse.parseNode(\n els, \n ['selector'],\n this._index, \n this._fileInfo, \n function(err, result) {\n if (err) {\n throw new LessError({\n index: err.index,\n message: err.message\n }, this.parse.imports, this._fileInfo.filename);\n }\n els = result[0].elements;\n });\n }\n return els;\n }\n\n createEmptySelectors() {\n const el = new Element('', '&', false, this._index, this._fileInfo);\n const sels = [new Selector([el], null, null, this._index, this._fileInfo)];\n sels[0].mediaEmpty = true;\n return sels;\n }\n\n match(other) {\n const elements = this.elements;\n const len = elements.length;\n let olen;\n let i;\n\n other = other.mixinElements();\n olen = other.length;\n if (olen === 0 || len < olen) {\n return 0;\n } else {\n for (i = 0; i < olen; i++) {\n if (elements[i].value !== other[i]) {\n return 0;\n }\n }\n }\n\n return olen; // return number of matched elements\n }\n\n mixinElements() {\n if (this.mixinElements_) {\n return this.mixinElements_;\n }\n\n let elements = this.elements.map( v => v.combinator.value + (v.value.value || v.value)).join('').match(/[,&#\\*\\.\\w-]([\\w-]|(\\\\.))*/g);\n\n if (elements) {\n if (elements[0] === '&') {\n elements.shift();\n }\n } else {\n elements = [];\n }\n\n return (this.mixinElements_ = elements);\n }\n\n isJustParentSelector() {\n return !this.mediaEmpty &&\n this.elements.length === 1 &&\n this.elements[0].value === '&' &&\n (this.elements[0].combinator.value === ' ' || this.elements[0].combinator.value === '');\n }\n\n eval(context) {\n const evaldCondition = this.condition && this.condition.eval(context);\n let elements = this.elements;\n let extendList = this.extendList;\n\n elements = elements && elements.map(e => e.eval(context));\n extendList = extendList && extendList.map(extend => extend.eval(context));\n\n return this.createDerived(elements, extendList, evaldCondition);\n }\n\n genCSS(context, output) {\n let i;\n let element;\n if ((!context || !context.firstSelector) && this.elements[0].combinator.value === '') {\n output.add(' ', this.fileInfo(), this.getIndex());\n }\n for (i = 0; i < this.elements.length; i++) {\n element = this.elements[i];\n element.genCSS(context, output);\n }\n }\n\n getIsOutput() {\n return this.evaldCondition;\n }\n}\n\nSelector.prototype.type = 'Selector';\nexport default Selector;\n","import Node from './node';\n\nclass Value extends Node {\n constructor(value) {\n super();\n\n if (!value) {\n throw new Error('Value requires an array argument');\n }\n if (!Array.isArray(value)) {\n this.value = [ value ];\n }\n else {\n this.value = value;\n }\n }\n\n accept(visitor) {\n if (this.value) {\n this.value = visitor.visitArray(this.value);\n }\n }\n\n eval(context) {\n if (this.value.length === 1) {\n return this.value[0].eval(context);\n } else {\n return new Value(this.value.map(v => v.eval(context)));\n }\n }\n\n genCSS(context, output) {\n let i;\n for (i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (i + 1 < this.value.length) {\n output.add((context && context.compress) ? ',' : ', ');\n }\n }\n }\n}\n\nValue.prototype.type = 'Value';\nexport default Value;\n","import Node from './node';\n\nclass Keyword extends Node {\n constructor(value) {\n super();\n\n this.value = value;\n }\n\n genCSS(context, output) {\n if (this.value === '%') { throw { type: 'Syntax', message: 'Invalid % without number' }; }\n output.add(this.value);\n }\n}\n\nKeyword.prototype.type = 'Keyword';\n\nKeyword.True = new Keyword('true');\nKeyword.False = new Keyword('false');\n\nexport default Keyword;\n","import Node from './node';\n\nclass Anonymous extends Node {\n constructor(value, index, currentFileInfo, mapLines, rulesetLike, visibilityInfo) {\n super();\n\n this.value = value;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.mapLines = mapLines;\n this.rulesetLike = (typeof rulesetLike === 'undefined') ? false : rulesetLike;\n this.allowRoot = true;\n this.copyVisibilityInfo(visibilityInfo);\n }\n\n eval() {\n return new Anonymous(this.value, this._index, this._fileInfo, this.mapLines, this.rulesetLike, this.visibilityInfo());\n }\n\n compare(other) {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n\n isRulesetLike() {\n return this.rulesetLike;\n }\n\n genCSS(context, output) {\n this.nodeVisible = Boolean(this.value);\n if (this.nodeVisible) {\n output.add(this.value, this._fileInfo, this._index, this.mapLines);\n }\n }\n}\n\nAnonymous.prototype.type = 'Anonymous';\nexport default Anonymous;\n","import Node from './node';\nimport Value from './value';\nimport Keyword from './keyword';\nimport Anonymous from './anonymous';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Declaration extends Node {\n constructor(name, value, important, merge, index, currentFileInfo, inline, variable) {\n super();\n\n this.name = name;\n this.value = (value instanceof Node) ? value : new Value([value ? new Anonymous(value) : null]);\n this.important = important ? ` ${important.trim()}` : '';\n this.merge = merge;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.inline = inline || false;\n this.variable = (variable !== undefined) ? variable\n : (name.charAt && (name.charAt(0) === '@'));\n this.allowRoot = true;\n this.setParent(this.value, this);\n }\n\n genCSS(context, output) {\n output.add(this.name + (context.compress ? ':' : ': '), this.fileInfo(), this.getIndex());\n try {\n this.value.genCSS(context, output);\n }\n catch (e) {\n e.index = this._index;\n e.filename = this._fileInfo.filename;\n throw e;\n }\n output.add(this.important + ((this.inline || (context.lastRule && context.compress)) ? '' : ';'), this._fileInfo, this._index);\n }\n\n eval(context) {\n let mathBypass = false;\n let prevMath;\n let name = this.name;\n let evaldValue;\n let variable = this.variable;\n if (typeof name !== 'string') {\n // expand 'primitive' name directly to get\n // things faster (~10% for benchmark.less):\n name = (name.length === 1) && (name[0] instanceof Keyword) ?\n name[0].value : evalName(context, name);\n variable = false; // never treat expanded interpolation as new variable name\n }\n\n // @todo remove when parens-division is default\n if (name === 'font' && context.math === MATH.ALWAYS) {\n mathBypass = true;\n prevMath = context.math;\n context.math = MATH.PARENS_DIVISION;\n }\n try {\n context.importantScope.push({});\n evaldValue = this.value.eval(context);\n\n if (!this.variable && evaldValue.type === 'DetachedRuleset') {\n throw { message: 'Rulesets cannot be evaluated on a property.',\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n let important = this.important;\n const importantResult = context.importantScope.pop();\n if (!important && importantResult.important) {\n important = importantResult.important;\n }\n\n return new Declaration(name,\n evaldValue,\n important,\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline,\n variable);\n }\n catch (e) {\n if (typeof e.index !== 'number') {\n e.index = this.getIndex();\n e.filename = this.fileInfo().filename;\n }\n throw e;\n }\n finally {\n if (mathBypass) {\n context.math = prevMath;\n }\n }\n }\n\n makeImportant() {\n return new Declaration(this.name,\n this.value,\n '!important',\n this.merge,\n this.getIndex(), this.fileInfo(), this.inline);\n }\n}\n\nfunction evalName(context, name) {\n let value = '';\n let i;\n const n = name.length;\n const output = {add: function (s) {value += s;}};\n for (i = 0; i < n; i++) {\n name[i].eval(context).genCSS(context, output);\n }\n return value;\n}\n\nDeclaration.prototype.type = 'Declaration';\nexport default Declaration;","const debugInfo = (context, ctx, lineSeparator) => {\n let result = '';\n if (context.dumpLineNumbers && !context.compress) {\n switch (context.dumpLineNumbers) {\n case 'comments':\n result = debugInfo.asComment(ctx);\n break;\n case 'mediaquery':\n result = debugInfo.asMediaQuery(ctx);\n break;\n case 'all':\n result = debugInfo.asComment(ctx) + (lineSeparator || '') + debugInfo.asMediaQuery(ctx);\n break;\n }\n }\n return result;\n};\n\ndebugInfo.asComment = ctx => `/* line ${ctx.debugInfo.lineNumber}, ${ctx.debugInfo.fileName} */\\n`;\n\ndebugInfo.asMediaQuery = ctx => {\n let filenameWithProtocol = ctx.debugInfo.fileName;\n if (!/^[a-z]+:\\/\\//i.test(filenameWithProtocol)) {\n filenameWithProtocol = `file://${filenameWithProtocol}`;\n }\n return `@media -sass-debug-info{filename{font-family:${filenameWithProtocol.replace(/([.:\\/\\\\])/g, a => {\n if (a == '\\\\') {\n a = '\\/';\n }\n return `\\\\${a}`;\n })}}line{font-family:\\\\00003${ctx.debugInfo.lineNumber}}}\\n`;\n};\n\nexport default debugInfo;\n","import Node from './node';\nimport getDebugInfo from './debug-info';\n\nclass Comment extends Node {\n constructor(value, isLineComment, index, currentFileInfo) {\n super();\n\n this.value = value;\n this.isLineComment = isLineComment;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n genCSS(context, output) {\n if (this.debugInfo) {\n output.add(getDebugInfo(context, this), this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n }\n\n isSilent(context) {\n const isCompressed = context.compress && this.value[2] !== '!';\n return this.isLineComment || isCompressed;\n }\n}\n\nComment.prototype.type = 'Comment';\nexport default Comment;\n","const contexts = {};\nexport default contexts;\nimport * as Constants from './constants';\n\nconst copyFromOriginal = function copyFromOriginal(original, destination, propertiesToCopy) {\n if (!original) { return; }\n\n for (let i = 0; i < propertiesToCopy.length; i++) {\n if (original.hasOwnProperty(propertiesToCopy[i])) {\n destination[propertiesToCopy[i]] = original[propertiesToCopy[i]];\n }\n }\n};\n\n/*\n parse is used whilst parsing\n */\nconst parseCopyProperties = [\n // options\n 'paths', // option - unmodified - paths to search for imports on\n 'rewriteUrls', // option - whether to adjust URL's to be relative\n 'rootpath', // option - rootpath to append to URL's\n 'strictImports', // option -\n 'insecure', // option - whether to allow imports from insecure ssl hosts\n 'dumpLineNumbers', // option - whether to dump line numbers\n 'compress', // option - whether to compress\n 'syncImport', // option - whether to import synchronously\n 'chunkInput', // option - whether to chunk input. more performant but causes parse issues.\n 'mime', // browser only - mime type for sheet import\n 'useFileCache', // browser only - whether to use the per file session cache\n // context\n 'processImports', // option & context - whether to process imports. if false then imports will not be imported.\n // Used by the import manager to stop multiple import visitors being created.\n 'pluginManager' // Used as the plugin manager for the session\n];\n\ncontexts.Parse = function(options) {\n copyFromOriginal(options, this, parseCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n};\n\nconst evalCopyProperties = [\n 'paths', // additional include paths\n 'compress', // whether to compress\n 'math', // whether math has to be within parenthesis\n 'strictUnits', // whether units need to evaluate correctly\n 'sourceMap', // whether to output a source map\n 'importMultiple', // whether we are currently importing multiple copies\n 'urlArgs', // whether to add args into url tokens\n 'javascriptEnabled', // option - whether Inline JavaScript is enabled. if undefined, defaults to false\n 'pluginManager', // Used as the plugin manager for the session\n 'importantScope', // used to bubble up !important statements\n 'rewriteUrls' // option - whether to adjust URL's to be relative\n];\n\nfunction isPathRelative(path) {\n return !/^(?:[a-z-]+:|\\/|#)/i.test(path);\n}\n\nfunction isPathLocalRelative(path) {\n return path.charAt(0) === '.';\n}\n\ncontexts.Eval = class {\n constructor(options, frames) {\n copyFromOriginal(options, this, evalCopyProperties);\n\n if (typeof this.paths === 'string') { this.paths = [this.paths]; }\n\n this.frames = frames || [];\n this.importantScope = this.importantScope || [];\n this.inCalc = false;\n this.mathOn = true;\n }\n\n enterCalc() {\n if (!this.calcStack) {\n this.calcStack = [];\n }\n this.calcStack.push(true);\n this.inCalc = true;\n }\n\n exitCalc() {\n this.calcStack.pop();\n if (!this.calcStack) {\n this.inCalc = false;\n }\n }\n\n inParenthesis() {\n if (!this.parensStack) {\n this.parensStack = [];\n }\n this.parensStack.push(true);\n };\n\n outOfParenthesis() {\n this.parensStack.pop();\n };\n\n isMathOn(op) {\n if (!this.mathOn) {\n return false;\n }\n if (op === '/' && this.math !== Constants.Math.ALWAYS && (!this.parensStack || !this.parensStack.length)) {\n return false;\n }\n if (this.math > Constants.Math.PARENS_DIVISION) {\n return this.parensStack && this.parensStack.length;\n }\n return true;\n }\n\n pathRequiresRewrite(path) {\n const isRelative = this.rewriteUrls === Constants.RewriteUrls.LOCAL ? isPathLocalRelative : isPathRelative;\n\n return isRelative(path);\n }\n\n rewritePath(path, rootpath) {\n let newPath;\n\n rootpath = rootpath || '';\n newPath = this.normalizePath(rootpath + path);\n\n // If a path was explicit relative and the rootpath was not an absolute path\n // we must ensure that the new path is also explicit relative.\n if (isPathLocalRelative(path) &&\n isPathRelative(rootpath) &&\n isPathLocalRelative(newPath) === false) {\n newPath = `./${newPath}`;\n }\n\n return newPath;\n }\n\n normalizePath(path) {\n const segments = path.split('/').reverse();\n let segment;\n\n path = [];\n while (segments.length !== 0) {\n segment = segments.pop();\n switch ( segment ) {\n case '.':\n break;\n case '..':\n if ((path.length === 0) || (path[path.length - 1] === '..')) {\n path.push( segment );\n } else {\n path.pop();\n }\n break;\n default:\n path.push(segment);\n break;\n }\n }\n\n return path.join('/');\n }\n}\n","function makeRegistry( base ) {\n return {\n _data: {},\n add: function(name, func) {\n // precautionary case conversion, as later querying of\n // the registry by function-caller uses lower case as well.\n name = name.toLowerCase();\n\n if (this._data.hasOwnProperty(name)) {\n // TODO warn\n }\n this._data[name] = func;\n },\n addMultiple: function(functions) {\n Object.keys(functions).forEach(\n name => {\n this.add(name, functions[name]);\n });\n },\n get: function(name) {\n return this._data[name] || ( base && base.get( name ));\n },\n getLocalFunctions: function() {\n return this._data;\n },\n inherit: function() {\n return makeRegistry( this );\n },\n create: function(base) {\n return makeRegistry(base);\n }\n };\n}\n\nexport default makeRegistry( null );","import Keyword from '../tree/keyword';\n\nconst defaultFunc = {\n eval: function () {\n const v = this.value_;\n const e = this.error_;\n if (e) {\n throw e;\n }\n if (v != null) {\n return v ? Keyword.True : Keyword.False;\n }\n },\n value: function (v) {\n this.value_ = v;\n },\n error: function (e) {\n this.error_ = e;\n },\n reset: function () {\n this.value_ = this.error_ = null;\n }\n};\n\nexport default defaultFunc;\n","import Node from './node';\nimport Declaration from './declaration';\nimport Keyword from './keyword';\nimport Comment from './comment';\nimport Paren from './paren';\nimport Selector from './selector';\nimport Element from './element';\nimport Anonymous from './anonymous';\nimport contexts from '../contexts';\nimport globalFunctionRegistry from '../functions/function-registry';\nimport defaultFunc from '../functions/default';\nimport getDebugInfo from './debug-info';\nimport * as utils from '../utils';\n\nclass Ruleset extends Node {\n constructor(selectors, rules, strictImports, visibilityInfo) {\n super();\n\n this.selectors = selectors;\n this.rules = rules;\n this._lookups = {};\n this._variables = null;\n this._properties = null;\n this.strictImports = strictImports;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n this.setParent(this.selectors, this);\n this.setParent(this.rules, this);\n\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.paths) {\n this.paths = visitor.visitArray(this.paths, true);\n } else if (this.selectors) {\n this.selectors = visitor.visitArray(this.selectors);\n }\n if (this.rules && this.rules.length) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n eval(context) {\n const that = this;\n let selectors;\n let selCnt;\n let selector;\n let i;\n let hasVariable;\n let hasOnePassingSelector = false;\n\n if (this.selectors && (selCnt = this.selectors.length)) {\n selectors = new Array(selCnt);\n defaultFunc.error({\n type: 'Syntax',\n message: 'it is currently only allowed in parametric mixin guards,'\n });\n\n for (i = 0; i < selCnt; i++) {\n selector = this.selectors[i].eval(context);\n for (var j = 0; j < selector.elements.length; j++) {\n if (selector.elements[j].isVariable) {\n hasVariable = true;\n break;\n }\n }\n selectors[i] = selector;\n if (selector.evaldCondition) {\n hasOnePassingSelector = true;\n }\n }\n\n if (hasVariable) {\n const toParseSelectors = new Array(selCnt);\n for (i = 0; i < selCnt; i++) {\n selector = selectors[i];\n toParseSelectors[i] = selector.toCSS(context);\n }\n this.parse.parseNode(\n toParseSelectors.join(','),\n [\"selectors\"], \n selectors[0].getIndex(), \n selectors[0].fileInfo(), \n (err, result) => {\n if (result) {\n selectors = utils.flattenArray(result);\n }\n });\n }\n\n defaultFunc.reset();\n } else {\n hasOnePassingSelector = true;\n }\n\n let rules = this.rules ? utils.copyArray(this.rules) : null;\n const ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo());\n let rule;\n let subRule;\n\n ruleset.originalRuleset = this;\n ruleset.root = this.root;\n ruleset.firstRoot = this.firstRoot;\n ruleset.allowImports = this.allowImports;\n\n if (this.debugInfo) {\n ruleset.debugInfo = this.debugInfo;\n }\n\n if (!hasOnePassingSelector) {\n rules.length = 0;\n }\n\n // inherit a function registry from the frames stack when possible;\n // otherwise from the global registry\n ruleset.functionRegistry = (frames => {\n let i = 0;\n const n = frames.length;\n let found;\n for ( ; i !== n ; ++i ) {\n found = frames[ i ].functionRegistry;\n if ( found ) { return found; }\n }\n return globalFunctionRegistry;\n })(context.frames).inherit();\n\n // push the current ruleset to the frames stack\n const ctxFrames = context.frames;\n ctxFrames.unshift(ruleset);\n\n // currrent selectors\n let ctxSelectors = context.selectors;\n if (!ctxSelectors) {\n context.selectors = ctxSelectors = [];\n }\n ctxSelectors.unshift(this.selectors);\n\n // Evaluate imports\n if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {\n ruleset.evalImports(context);\n }\n\n // Store the frames around mixin definitions,\n // so they can be evaluated like closures when the time comes.\n const rsRules = ruleset.rules;\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.evalFirst) {\n rsRules[i] = rule.eval(context);\n }\n }\n\n const mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0;\n\n // Evaluate mixin calls.\n for (i = 0; (rule = rsRules[i]); i++) {\n if (rule.type === 'MixinCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope if the variable is\n // already there. consider returning false here\n // but we need a way to \"return\" variable from mixins\n return !(ruleset.variable(r.name));\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n } else if (rule.type === 'VariableCall') {\n /* jshint loopfunc:true */\n rules = rule.eval(context).rules.filter(r => {\n if ((r instanceof Declaration) && r.variable) {\n // do not pollute the scope at all\n return false;\n }\n return true;\n });\n rsRules.splice(...[i, 1].concat(rules));\n i += rules.length - 1;\n ruleset.resetCache();\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n if (!rule.evalFirst) {\n rsRules[i] = rule = rule.eval ? rule.eval(context) : rule;\n }\n }\n\n // Evaluate everything else\n for (i = 0; (rule = rsRules[i]); i++) {\n // for rulesets, check if it is a css guard and can be removed\n if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) {\n // check if it can be folded in (e.g. & where)\n if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) {\n rsRules.splice(i--, 1);\n\n for (var j = 0; (subRule = rule.rules[j]); j++) {\n if (subRule instanceof Node) {\n subRule.copyVisibilityInfo(rule.visibilityInfo());\n if (!(subRule instanceof Declaration) || !subRule.variable) {\n rsRules.splice(++i, 0, subRule);\n }\n }\n }\n }\n }\n }\n\n // Pop the stack\n ctxFrames.shift();\n ctxSelectors.shift();\n\n if (context.mediaBlocks) {\n for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) {\n context.mediaBlocks[i].bubbleSelectors(selectors);\n }\n }\n\n return ruleset;\n }\n\n evalImports(context) {\n const rules = this.rules;\n let i;\n let importRules;\n if (!rules) { return; }\n\n for (i = 0; i < rules.length; i++) {\n if (rules[i].type === 'Import') {\n importRules = rules[i].eval(context);\n if (importRules && (importRules.length || importRules.length === 0)) {\n rules.splice(...[i, 1].concat(importRules));\n i += importRules.length - 1;\n } else {\n rules.splice(i, 1, importRules);\n }\n this.resetCache();\n }\n }\n }\n\n makeImportant() {\n const result = new Ruleset(this.selectors, this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant();\n } else {\n return r;\n }\n }), this.strictImports, this.visibilityInfo());\n\n return result;\n }\n\n matchArgs(args) {\n return !args || args.length === 0;\n }\n\n // lets you call a css selector with a guard\n matchCondition(args, context) {\n const lastSelector = this.selectors[this.selectors.length - 1];\n if (!lastSelector.evaldCondition) {\n return false;\n }\n if (lastSelector.condition &&\n !lastSelector.condition.eval(\n new contexts.Eval(context,\n context.frames))) {\n return false;\n }\n return true;\n }\n\n resetCache() {\n this._rulesets = null;\n this._variables = null;\n this._properties = null;\n this._lookups = {};\n }\n\n variables() {\n if (!this._variables) {\n this._variables = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable === true) {\n hash[r.name] = r;\n }\n // when evaluating variables in an import statement, imports have not been eval'd\n // so we need to go inside import statements.\n // guard against root being a string (in the case of inlined less)\n if (r.type === 'Import' && r.root && r.root.variables) {\n const vars = r.root.variables();\n for (const name in vars) {\n if (vars.hasOwnProperty(name)) {\n hash[name] = r.root.variable(name);\n }\n }\n }\n return hash;\n }, {});\n }\n return this._variables;\n }\n\n properties() {\n if (!this._properties) {\n this._properties = !this.rules ? {} : this.rules.reduce((hash, r) => {\n if (r instanceof Declaration && r.variable !== true) {\n const name = (r.name.length === 1) && (r.name[0] instanceof Keyword) ?\n r.name[0].value : r.name;\n // Properties don't overwrite as they can merge\n if (!hash[`$${name}`]) {\n hash[`$${name}`] = [ r ];\n }\n else {\n hash[`$${name}`].push(r);\n }\n }\n return hash;\n }, {});\n }\n return this._properties;\n }\n\n variable(name) {\n const decl = this.variables()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n property(name) {\n const decl = this.properties()[name];\n if (decl) {\n return this.parseValue(decl);\n }\n }\n\n lastDeclaration() {\n for (let i = this.rules.length; i > 0; i--) {\n const decl = this.rules[i - 1];\n if (decl instanceof Declaration) {\n return this.parseValue(decl);\n }\n }\n }\n\n parseValue(toParse) {\n const self = this;\n function transformDeclaration(decl) {\n if (decl.value instanceof Anonymous && !decl.parsed) {\n if (typeof decl.value.value === 'string') {\n this.parse.parseNode(\n decl.value.value,\n ['value', 'important'], \n decl.value.getIndex(), \n decl.fileInfo(), \n (err, result) => {\n if (err) {\n decl.parsed = true;\n }\n if (result) {\n decl.value = result[0];\n decl.important = result[1] || '';\n decl.parsed = true;\n }\n });\n } else {\n decl.parsed = true;\n }\n\n return decl;\n }\n else {\n return decl;\n }\n }\n if (!Array.isArray(toParse)) {\n return transformDeclaration.call(self, toParse);\n }\n else {\n const nodes = [];\n toParse.forEach(n => {\n nodes.push(transformDeclaration.call(self, n));\n });\n return nodes;\n }\n }\n\n rulesets() {\n if (!this.rules) { return []; }\n\n const filtRules = [];\n const rules = this.rules;\n let i;\n let rule;\n\n for (i = 0; (rule = rules[i]); i++) {\n if (rule.isRuleset) {\n filtRules.push(rule);\n }\n }\n\n return filtRules;\n }\n\n prependRule(rule) {\n const rules = this.rules;\n if (rules) {\n rules.unshift(rule);\n } else {\n this.rules = [ rule ];\n }\n this.setParent(rule, this);\n }\n\n find(selector, self = this, filter) {\n const rules = [];\n let match;\n let foundMixins;\n const key = selector.toCSS();\n\n if (key in this._lookups) { return this._lookups[key]; }\n\n this.rulesets().forEach(rule => {\n if (rule !== self) {\n for (let j = 0; j < rule.selectors.length; j++) {\n match = selector.match(rule.selectors[j]);\n if (match) {\n if (selector.elements.length > match) {\n if (!filter || filter(rule)) {\n foundMixins = rule.find(new Selector(selector.elements.slice(match)), self, filter);\n for (let i = 0; i < foundMixins.length; ++i) {\n foundMixins[i].path.push(rule);\n }\n Array.prototype.push.apply(rules, foundMixins);\n }\n } else {\n rules.push({ rule, path: []});\n }\n break;\n }\n }\n }\n });\n this._lookups[key] = rules;\n return rules;\n }\n\n genCSS(context, output) {\n let i;\n let j;\n const charsetRuleNodes = [];\n let ruleNodes = [];\n\n let // Line number debugging\n debugInfo;\n\n let rule;\n let path;\n\n context.tabLevel = (context.tabLevel || 0);\n\n if (!this.root) {\n context.tabLevel++;\n }\n\n const tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' ');\n const tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' ');\n let sep;\n\n let charsetNodeIndex = 0;\n let importNodeIndex = 0;\n for (i = 0; (rule = this.rules[i]); i++) {\n if (rule instanceof Comment) {\n if (importNodeIndex === i) {\n importNodeIndex++;\n }\n ruleNodes.push(rule);\n } else if (rule.isCharset && rule.isCharset()) {\n ruleNodes.splice(charsetNodeIndex, 0, rule);\n charsetNodeIndex++;\n importNodeIndex++;\n } else if (rule.type === 'Import') {\n ruleNodes.splice(importNodeIndex, 0, rule);\n importNodeIndex++;\n } else {\n ruleNodes.push(rule);\n }\n }\n ruleNodes = charsetRuleNodes.concat(ruleNodes);\n\n // If this is the root node, we don't render\n // a selector, or {}.\n if (!this.root) {\n debugInfo = getDebugInfo(context, this, tabSetStr);\n\n if (debugInfo) {\n output.add(debugInfo);\n output.add(tabSetStr);\n }\n\n const paths = this.paths;\n const pathCnt = paths.length;\n let pathSubCnt;\n\n sep = context.compress ? ',' : (`,\\n${tabSetStr}`);\n\n for (i = 0; i < pathCnt; i++) {\n path = paths[i];\n if (!(pathSubCnt = path.length)) { continue; }\n if (i > 0) { output.add(sep); }\n\n context.firstSelector = true;\n path[0].genCSS(context, output);\n\n context.firstSelector = false;\n for (j = 1; j < pathSubCnt; j++) {\n path[j].genCSS(context, output);\n }\n }\n\n output.add((context.compress ? '{' : ' {\\n') + tabRuleStr);\n }\n\n // Compile rules and rulesets\n for (i = 0; (rule = ruleNodes[i]); i++) {\n\n if (i + 1 === ruleNodes.length) {\n context.lastRule = true;\n }\n\n const currentLastRule = context.lastRule;\n if (rule.isRulesetLike(rule)) {\n context.lastRule = false;\n }\n\n if (rule.genCSS) {\n rule.genCSS(context, output);\n } else if (rule.value) {\n output.add(rule.value.toString());\n }\n\n context.lastRule = currentLastRule;\n\n if (!context.lastRule && rule.isVisible()) {\n output.add(context.compress ? '' : (`\\n${tabRuleStr}`));\n } else {\n context.lastRule = false;\n }\n }\n\n if (!this.root) {\n output.add((context.compress ? '}' : `\\n${tabSetStr}}`));\n context.tabLevel--;\n }\n\n if (!output.isEmpty() && !context.compress && this.firstRoot) {\n output.add('\\n');\n }\n }\n\n joinSelectors(paths, context, selectors) {\n for (let s = 0; s < selectors.length; s++) {\n this.joinSelector(paths, context, selectors[s]);\n }\n }\n\n joinSelector(paths, context, selector) {\n function createParenthesis(elementsToPak, originalElement) {\n let replacementParen;\n let j;\n if (elementsToPak.length === 0) {\n replacementParen = new Paren(elementsToPak[0]);\n } else {\n const insideParent = new Array(elementsToPak.length);\n for (j = 0; j < elementsToPak.length; j++) {\n insideParent[j] = new Element(\n null,\n elementsToPak[j],\n originalElement.isVariable,\n originalElement._index,\n originalElement._fileInfo\n );\n }\n replacementParen = new Paren(new Selector(insideParent));\n }\n return replacementParen;\n }\n\n function createSelector(containedElement, originalElement) {\n let element;\n let selector;\n element = new Element(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo);\n selector = new Selector([element]);\n return selector;\n }\n\n // joins selector path from `beginningPath` with selector path in `addPath`\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns concatenated path\n function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) {\n let newSelectorPath;\n let lastSelector;\n let newJoinedSelector;\n // our new selector path\n newSelectorPath = [];\n\n // construct the joined selector - if & is the first thing this will be empty,\n // if not newJoinedSelector will be the last set of elements in the selector\n if (beginningPath.length > 0) {\n newSelectorPath = utils.copyArray(beginningPath);\n lastSelector = newSelectorPath.pop();\n newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements));\n }\n else {\n newJoinedSelector = originalSelector.createDerived([]);\n }\n\n if (addPath.length > 0) {\n // /deep/ is a CSS4 selector - (removed, so should deprecate)\n // that is valid without anything in front of it\n // so if the & does not have a combinator that is \"\" or \" \" then\n // and there is a combinator on the parent, then grab that.\n // this also allows + a { & .b { .a & { ... though not sure why you would want to do that\n let combinator = replacedElement.combinator;\n\n const parentEl = addPath[0].elements[0];\n if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) {\n combinator = parentEl.combinator;\n }\n // join the elements so far with the first part of the parent\n newJoinedSelector.elements.push(new Element(\n combinator,\n parentEl.value,\n replacedElement.isVariable,\n replacedElement._index,\n replacedElement._fileInfo\n ));\n newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1));\n }\n\n // now add the joined selector - but only if it is not empty\n if (newJoinedSelector.elements.length !== 0) {\n newSelectorPath.push(newJoinedSelector);\n }\n\n // put together the parent selectors after the join (e.g. the rest of the parent)\n if (addPath.length > 1) {\n let restOfPath = addPath.slice(1);\n restOfPath = restOfPath.map(selector => selector.createDerived(selector.elements, []));\n newSelectorPath = newSelectorPath.concat(restOfPath);\n }\n return newSelectorPath;\n }\n\n // joins selector path from `beginningPath` with every selector path in `addPaths` array\n // `replacedElement` contains element that is being replaced by `addPath`\n // returns array with all concatenated paths\n function addAllReplacementsIntoPath( beginningPath, addPaths, replacedElement, originalSelector, result) {\n let j;\n for (j = 0; j < beginningPath.length; j++) {\n const newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector);\n result.push(newSelectorPath);\n }\n return result;\n }\n\n function mergeElementsOnToSelectors(elements, selectors) {\n let i;\n let sel;\n\n if (elements.length === 0) {\n return ;\n }\n if (selectors.length === 0) {\n selectors.push([ new Selector(elements) ]);\n return;\n }\n\n for (i = 0; (sel = selectors[i]); i++) {\n // if the previous thing in sel is a parent this needs to join on to it\n if (sel.length > 0) {\n sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements));\n }\n else {\n sel.push(new Selector(elements));\n }\n }\n }\n\n // replace all parent selectors inside `inSelector` by content of `context` array\n // resulting selectors are returned inside `paths` array\n // returns true if `inSelector` contained at least one parent selector\n function replaceParentSelector(paths, context, inSelector) {\n // The paths are [[Selector]]\n // The first list is a list of comma separated selectors\n // The inner list is a list of inheritance separated selectors\n // e.g.\n // .a, .b {\n // .c {\n // }\n // }\n // == [[.a] [.c]] [[.b] [.c]]\n //\n let i;\n\n let j;\n let k;\n let currentElements;\n let newSelectors;\n let selectorsMultiplied;\n let sel;\n let el;\n let hadParentSelector = false;\n let length;\n let lastSelector;\n function findNestedSelector(element) {\n let maybeSelector;\n if (!(element.value instanceof Paren)) {\n return null;\n }\n\n maybeSelector = element.value.value;\n if (!(maybeSelector instanceof Selector)) {\n return null;\n }\n\n return maybeSelector;\n }\n\n // the elements from the current selector so far\n currentElements = [];\n // the current list of new selectors to add to the path.\n // We will build it up. We initiate it with one empty selector as we \"multiply\" the new selectors\n // by the parents\n newSelectors = [\n []\n ];\n\n for (i = 0; (el = inSelector.elements[i]); i++) {\n // non parent reference elements just get added\n if (el.value !== '&') {\n const nestedSelector = findNestedSelector(el);\n if (nestedSelector != null) {\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n const nestedPaths = [];\n let replaced;\n const replacedNewSelectors = [];\n replaced = replaceParentSelector(nestedPaths, context, nestedSelector);\n hadParentSelector = hadParentSelector || replaced;\n // the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors\n for (k = 0; k < nestedPaths.length; k++) {\n const replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el);\n addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors);\n }\n newSelectors = replacedNewSelectors;\n currentElements = [];\n } else {\n currentElements.push(el);\n }\n\n } else {\n hadParentSelector = true;\n // the new list of selectors to add\n selectorsMultiplied = [];\n\n // merge the current list of non parent selector elements\n // on to the current list of selectors to add\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n // loop through our current selectors\n for (j = 0; j < newSelectors.length; j++) {\n sel = newSelectors[j];\n // if we don't have any parent paths, the & might be in a mixin so that it can be used\n // whether there are parents or not\n if (context.length === 0) {\n // the combinator used on el should now be applied to the next element instead so that\n // it is not lost\n if (sel.length > 0) {\n sel[0].elements.push(new Element(el.combinator, '', el.isVariable, el._index, el._fileInfo));\n }\n selectorsMultiplied.push(sel);\n }\n else {\n // and the parent selectors\n for (k = 0; k < context.length; k++) {\n // We need to put the current selectors\n // then join the last selector's elements on to the parents selectors\n const newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector);\n // add that to our new set of selectors\n selectorsMultiplied.push(newSelectorPath);\n }\n }\n }\n\n // our new selectors has been multiplied, so reset the state\n newSelectors = selectorsMultiplied;\n currentElements = [];\n }\n }\n\n // if we have any elements left over (e.g. .a& .b == .b)\n // add them on to all the current selectors\n mergeElementsOnToSelectors(currentElements, newSelectors);\n\n for (i = 0; i < newSelectors.length; i++) {\n length = newSelectors[i].length;\n if (length > 0) {\n paths.push(newSelectors[i]);\n lastSelector = newSelectors[i][length - 1];\n newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList);\n }\n }\n\n return hadParentSelector;\n }\n\n function deriveSelector(visibilityInfo, deriveFrom) {\n const newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition);\n newSelector.copyVisibilityInfo(visibilityInfo);\n return newSelector;\n }\n\n // joinSelector code follows\n let i;\n\n let newPaths;\n let hadParentSelector;\n\n newPaths = [];\n hadParentSelector = replaceParentSelector(newPaths, context, selector);\n\n if (!hadParentSelector) {\n if (context.length > 0) {\n newPaths = [];\n for (i = 0; i < context.length; i++) {\n\n const concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo()));\n\n concatenated.push(selector);\n newPaths.push(concatenated);\n }\n }\n else {\n newPaths = [[selector]];\n }\n }\n\n for (i = 0; i < newPaths.length; i++) {\n paths.push(newPaths[i]);\n }\n }\n}\n\nRuleset.prototype.type = 'Ruleset';\nRuleset.prototype.isRuleset = true;\nexport default Ruleset;\n","import Node from './node';\nimport Selector from './selector';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\n\nclass AtRule extends Node {\n constructor(\n name,\n value,\n rules,\n index,\n currentFileInfo,\n debugInfo,\n isRooted,\n visibilityInfo\n ) {\n super();\n\n let i;\n\n this.name = name;\n this.value = (value instanceof Node) ? value : (value ? new Anonymous(value) : value);\n if (rules) {\n if (Array.isArray(rules)) {\n this.rules = rules;\n } else {\n this.rules = [rules];\n this.rules[0].selectors = (new Selector([], null, null, index, currentFileInfo)).createEmptySelectors();\n }\n for (i = 0; i < this.rules.length; i++) {\n this.rules[i].allowImports = true;\n }\n this.setParent(this.rules, this);\n }\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.debugInfo = debugInfo;\n this.isRooted = isRooted || false;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n const value = this.value;\n const rules = this.rules;\n if (rules) {\n this.rules = visitor.visitArray(rules);\n }\n if (value) {\n this.value = visitor.visit(value);\n }\n }\n\n isRulesetLike() {\n return this.rules || !this.isCharset();\n }\n\n isCharset() {\n return '@charset' === this.name;\n }\n\n genCSS(context, output) {\n const value = this.value;\n const rules = this.rules;\n output.add(this.name, this.fileInfo(), this.getIndex());\n if (value) {\n output.add(' ');\n value.genCSS(context, output);\n }\n if (rules) {\n this.outputRuleset(context, output, rules);\n } else {\n output.add(';');\n }\n }\n\n eval(context) {\n let mediaPathBackup;\n let mediaBlocksBackup;\n let value = this.value;\n let rules = this.rules;\n\n // media stored inside other atrule should not bubble over it\n // backpup media bubbling information\n mediaPathBackup = context.mediaPath;\n mediaBlocksBackup = context.mediaBlocks;\n // deleted media bubbling information\n context.mediaPath = [];\n context.mediaBlocks = [];\n\n if (value) {\n value = value.eval(context);\n }\n if (rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n rules = [rules[0].eval(context)];\n rules[0].root = true;\n }\n // restore media bubbling information\n context.mediaPath = mediaPathBackup;\n context.mediaBlocks = mediaBlocksBackup;\n\n return new AtRule(this.name, value, rules,\n this.getIndex(), this.fileInfo(), this.debugInfo, this.isRooted, this.visibilityInfo());\n }\n\n variable(name) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.variable.call(this.rules[0], name);\n }\n }\n\n find(...args) {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.find.apply(this.rules[0], args);\n }\n }\n\n rulesets() {\n if (this.rules) {\n // assuming that there is only one rule at this point - that is how parser constructs the rule\n return Ruleset.prototype.rulesets.apply(this.rules[0]);\n }\n }\n\n outputRuleset(context, output, rules) {\n const ruleCnt = rules.length;\n let i;\n context.tabLevel = (context.tabLevel | 0) + 1;\n\n // Compressed\n if (context.compress) {\n output.add('{');\n for (i = 0; i < ruleCnt; i++) {\n rules[i].genCSS(context, output);\n }\n output.add('}');\n context.tabLevel--;\n return;\n }\n\n // Non-compressed\n const tabSetStr = `\\n${Array(context.tabLevel).join(' ')}`;\n\n const tabRuleStr = `${tabSetStr} `;\n if (!ruleCnt) {\n output.add(` {${tabSetStr}}`);\n } else {\n output.add(` {${tabRuleStr}`);\n rules[0].genCSS(context, output);\n for (i = 1; i < ruleCnt; i++) {\n output.add(tabRuleStr);\n rules[i].genCSS(context, output);\n }\n output.add(`${tabSetStr}}`);\n }\n\n context.tabLevel--;\n }\n}\n\nAtRule.prototype.type = 'AtRule';\nexport default AtRule;\n","import Node from './node';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass DetachedRuleset extends Node {\n constructor(ruleset, frames) {\n super();\n\n this.ruleset = ruleset;\n this.frames = frames;\n this.setParent(this.ruleset, this);\n }\n\n accept(visitor) {\n this.ruleset = visitor.visit(this.ruleset);\n }\n\n eval(context) {\n const frames = this.frames || utils.copyArray(context.frames);\n return new DetachedRuleset(this.ruleset, frames);\n }\n\n callEval(context) {\n return this.ruleset.eval(this.frames ? new contexts.Eval(context, this.frames.concat(context.frames)) : context);\n }\n}\n\nDetachedRuleset.prototype.type = 'DetachedRuleset';\nDetachedRuleset.prototype.evalFirst = true;\nexport default DetachedRuleset;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport * as utils from '../utils';\n\nclass Unit extends Node {\n constructor(numerator, denominator, backupUnit) {\n super();\n\n this.numerator = numerator ? utils.copyArray(numerator).sort() : [];\n this.denominator = denominator ? utils.copyArray(denominator).sort() : [];\n if (backupUnit) {\n this.backupUnit = backupUnit;\n } else if (numerator && numerator.length) {\n this.backupUnit = numerator[0];\n }\n }\n\n clone() {\n return new Unit(utils.copyArray(this.numerator), utils.copyArray(this.denominator), this.backupUnit);\n }\n\n genCSS(context, output) {\n // Dimension checks the unit is singular and throws an error if in strict math mode.\n const strictUnits = context && context.strictUnits;\n if (this.numerator.length === 1) {\n output.add(this.numerator[0]); // the ideal situation\n } else if (!strictUnits && this.backupUnit) {\n output.add(this.backupUnit);\n } else if (!strictUnits && this.denominator.length) {\n output.add(this.denominator[0]);\n }\n }\n\n toString() {\n let i;\n let returnStr = this.numerator.join('*');\n for (i = 0; i < this.denominator.length; i++) {\n returnStr += `/${this.denominator[i]}`;\n }\n return returnStr;\n }\n\n compare(other) {\n return this.is(other.toString()) ? 0 : undefined;\n }\n\n is(unitString) {\n return this.toString().toUpperCase() === unitString.toUpperCase();\n }\n\n isLength() {\n return RegExp('^(px|em|ex|ch|rem|in|cm|mm|pc|pt|ex|vw|vh|vmin|vmax)$', 'gi').test(this.toCSS());\n }\n\n isEmpty() {\n return this.numerator.length === 0 && this.denominator.length === 0;\n }\n\n isSingular() {\n return this.numerator.length <= 1 && this.denominator.length === 0;\n }\n\n map(callback) {\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n this.numerator[i] = callback(this.numerator[i], false);\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n this.denominator[i] = callback(this.denominator[i], true);\n }\n }\n\n usedUnits() {\n let group;\n const result = {};\n let mapUnit;\n let groupName;\n\n mapUnit = atomicUnit => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit) && !result[groupName]) {\n result[groupName] = atomicUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in unitConversions) {\n if (unitConversions.hasOwnProperty(groupName)) {\n group = unitConversions[groupName];\n\n this.map(mapUnit);\n }\n }\n\n return result;\n }\n\n cancel() {\n const counter = {};\n let atomicUnit;\n let i;\n\n for (i = 0; i < this.numerator.length; i++) {\n atomicUnit = this.numerator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) + 1;\n }\n\n for (i = 0; i < this.denominator.length; i++) {\n atomicUnit = this.denominator[i];\n counter[atomicUnit] = (counter[atomicUnit] || 0) - 1;\n }\n\n this.numerator = [];\n this.denominator = [];\n\n for (atomicUnit in counter) {\n if (counter.hasOwnProperty(atomicUnit)) {\n const count = counter[atomicUnit];\n\n if (count > 0) {\n for (i = 0; i < count; i++) {\n this.numerator.push(atomicUnit);\n }\n } else if (count < 0) {\n for (i = 0; i < -count; i++) {\n this.denominator.push(atomicUnit);\n }\n }\n }\n }\n\n this.numerator.sort();\n this.denominator.sort();\n }\n}\n\nUnit.prototype.type = 'Unit';\nexport default Unit;\n","import Node from './node';\nimport unitConversions from '../data/unit-conversions';\nimport Unit from './unit';\nimport Color from './color';\n\n//\n// A number with a unit\n//\nclass Dimension extends Node {\n constructor(value, unit) {\n super();\n\n this.value = parseFloat(value);\n if (isNaN(this.value)) {\n throw new Error('Dimension is not a number.');\n }\n this.unit = (unit && unit instanceof Unit) ? unit :\n new Unit(unit ? [unit] : undefined);\n this.setParent(this.unit, this);\n }\n\n accept(visitor) {\n this.unit = visitor.visit(this.unit);\n }\n\n eval(context) {\n return this;\n }\n\n toColor() {\n return new Color([this.value, this.value, this.value]);\n }\n\n genCSS(context, output) {\n if ((context && context.strictUnits) && !this.unit.isSingular()) {\n throw new Error(`Multiple units in dimension. Correct the units or use the unit function. Bad unit: ${this.unit.toString()}`);\n }\n\n const value = this.fround(context, this.value);\n let strValue = String(value);\n\n if (value !== 0 && value < 0.000001 && value > -0.000001) {\n // would be output 1e-6 etc.\n strValue = value.toFixed(20).replace(/0+$/, '');\n }\n\n if (context && context.compress) {\n // Zero values doesn't need a unit\n if (value === 0 && this.unit.isLength()) {\n output.add(strValue);\n return;\n }\n\n // Float values doesn't need a leading zero\n if (value > 0 && value < 1) {\n strValue = (strValue).substr(1);\n }\n }\n\n output.add(strValue);\n this.unit.genCSS(context, output);\n }\n\n // In an operation between two Dimensions,\n // we default to the first Dimension's unit,\n // so `1px + 2` will yield `3px`.\n operate(context, op, other) {\n /* jshint noempty:false */\n let value = this._operate(context, op, this.value, other.value);\n\n let unit = this.unit.clone();\n\n if (op === '+' || op === '-') {\n if (unit.numerator.length === 0 && unit.denominator.length === 0) {\n unit = other.unit.clone();\n if (this.unit.backupUnit) {\n unit.backupUnit = this.unit.backupUnit;\n }\n } else if (other.unit.numerator.length === 0 && unit.denominator.length === 0) {\n // do nothing\n } else {\n other = other.convertTo(this.unit.usedUnits());\n\n if (context.strictUnits && other.unit.toString() !== unit.toString()) {\n throw new Error(`Incompatible units. Change the units or use the unit function. ` + \n `Bad units: '${unit.toString()}' and '${other.unit.toString()}'.`);\n }\n\n value = this._operate(context, op, this.value, other.value);\n }\n } else if (op === '*') {\n unit.numerator = unit.numerator.concat(other.unit.numerator).sort();\n unit.denominator = unit.denominator.concat(other.unit.denominator).sort();\n unit.cancel();\n } else if (op === '/') {\n unit.numerator = unit.numerator.concat(other.unit.denominator).sort();\n unit.denominator = unit.denominator.concat(other.unit.numerator).sort();\n unit.cancel();\n }\n return new Dimension(value, unit);\n }\n\n compare(other) {\n let a;\n let b;\n\n if (!(other instanceof Dimension)) {\n return undefined;\n }\n\n if (this.unit.isEmpty() || other.unit.isEmpty()) {\n a = this;\n b = other;\n } else {\n a = this.unify();\n b = other.unify();\n if (a.unit.compare(b.unit) !== 0) {\n return undefined;\n }\n }\n\n return Node.numericCompare(a.value, b.value);\n }\n\n unify() {\n return this.convertTo({ length: 'px', duration: 's', angle: 'rad' });\n }\n\n convertTo(conversions) {\n let value = this.value;\n const unit = this.unit.clone();\n let i;\n let groupName;\n let group;\n let targetUnit;\n let derivedConversions = {};\n let applyUnit;\n\n if (typeof conversions === 'string') {\n for (i in unitConversions) {\n if (unitConversions[i].hasOwnProperty(conversions)) {\n derivedConversions = {};\n derivedConversions[i] = conversions;\n }\n }\n conversions = derivedConversions;\n }\n applyUnit = (atomicUnit, denominator) => {\n /* jshint loopfunc:true */\n if (group.hasOwnProperty(atomicUnit)) {\n if (denominator) {\n value = value / (group[atomicUnit] / group[targetUnit]);\n } else {\n value = value * (group[atomicUnit] / group[targetUnit]);\n }\n\n return targetUnit;\n }\n\n return atomicUnit;\n };\n\n for (groupName in conversions) {\n if (conversions.hasOwnProperty(groupName)) {\n targetUnit = conversions[groupName];\n group = unitConversions[groupName];\n\n unit.map(applyUnit);\n }\n }\n\n unit.cancel();\n\n return new Dimension(value, unit);\n }\n}\n\nDimension.prototype.type = 'Dimension';\nexport default Dimension;\n","import Node from './node';\nimport Color from './color';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\n\nclass Operation extends Node {\n constructor(op, operands, isSpaced) {\n super();\n\n this.op = op.trim();\n this.operands = operands;\n this.isSpaced = isSpaced;\n }\n\n accept(visitor) {\n this.operands = visitor.visitArray(this.operands);\n }\n\n eval(context) {\n let a = this.operands[0].eval(context);\n let b = this.operands[1].eval(context);\n let op;\n\n if (context.isMathOn(this.op)) {\n op = this.op === './' ? '/' : this.op;\n if (a instanceof Dimension && b instanceof Color) {\n a = a.toColor();\n }\n if (b instanceof Dimension && a instanceof Color) {\n b = b.toColor();\n }\n if (!a.operate) {\n if (a instanceof Operation && a.op === '/' && context.math === MATH.PARENS_DIVISION) {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n throw { type: 'Operation',\n message: 'Operation on an invalid type' };\n }\n\n return a.operate(context, op, b);\n } else {\n return new Operation(this.op, [a, b], this.isSpaced);\n }\n }\n\n genCSS(context, output) {\n this.operands[0].genCSS(context, output);\n if (this.isSpaced) {\n output.add(' ');\n }\n output.add(this.op);\n if (this.isSpaced) {\n output.add(' ');\n }\n this.operands[1].genCSS(context, output);\n }\n}\n\nOperation.prototype.type = 'Operation';\nexport default Operation;\n","import Node from './node';\nimport Paren from './paren';\nimport Comment from './comment';\nimport Dimension from './dimension';\nimport * as Constants from '../constants';\nconst MATH = Constants.Math;\n\nclass Expression extends Node {\n constructor(value, noSpacing) {\n super();\n\n this.value = value;\n this.noSpacing = noSpacing;\n if (!value) {\n throw new Error('Expression requires an array parameter');\n }\n }\n\n accept(visitor) {\n this.value = visitor.visitArray(this.value);\n }\n\n eval(context) {\n let returnValue;\n const mathOn = context.isMathOn();\n\n const inParenthesis = this.parens && \n (context.math !== MATH.STRICT_LEGACY || !this.parensInOp);\n\n let doubleParen = false;\n if (inParenthesis) {\n context.inParenthesis();\n }\n if (this.value.length > 1) {\n returnValue = new Expression(this.value.map(e => {\n if (!e.eval) {\n return e;\n }\n return e.eval(context);\n }), this.noSpacing);\n } else if (this.value.length === 1) {\n if (this.value[0].parens && !this.value[0].parensInOp && !context.inCalc) {\n doubleParen = true;\n }\n returnValue = this.value[0].eval(context);\n } else {\n returnValue = this;\n }\n if (inParenthesis) {\n context.outOfParenthesis();\n }\n if (this.parens && this.parensInOp && !mathOn && !doubleParen \n && (!(returnValue instanceof Dimension))) {\n returnValue = new Paren(returnValue);\n }\n return returnValue;\n }\n\n genCSS(context, output) {\n for (let i = 0; i < this.value.length; i++) {\n this.value[i].genCSS(context, output);\n if (!this.noSpacing && i + 1 < this.value.length) {\n output.add(' ');\n }\n }\n }\n\n throwAwayComments() {\n this.value = this.value.filter(v => !(v instanceof Comment));\n }\n}\n\nExpression.prototype.type = 'Expression';\nexport default Expression;\n","import Expression from '../tree/expression';\n\nclass functionCaller {\n constructor(name, context, index, currentFileInfo) {\n this.name = name.toLowerCase();\n this.index = index;\n this.context = context;\n this.currentFileInfo = currentFileInfo;\n\n this.func = context.frames[0].functionRegistry.get(this.name);\n }\n\n isValid() {\n return Boolean(this.func);\n }\n\n call(args) {\n // This code is terrible and should be replaced as per this issue...\n // https://github.com/less/less.js/issues/2477\n if (Array.isArray(args)) {\n args = args.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n })\n .map(item => {\n if (item.type === 'Expression') {\n const subNodes = item.value.filter(item => {\n if (item.type === 'Comment') {\n return false;\n }\n return true;\n });\n if (subNodes.length === 1) {\n return subNodes[0];\n } else {\n return new Expression(subNodes);\n }\n }\n return item;\n });\n }\n\n return this.func(...args);\n }\n}\n\nexport default functionCaller;\n","import Node from './node';\nimport Anonymous from './anonymous';\nimport FunctionCaller from '../functions/function-caller';\n\n//\n// A function call node.\n//\nclass Call extends Node {\n constructor(name, args, index, currentFileInfo) {\n super();\n\n this.name = name;\n this.args = args;\n this.calc = name === 'calc';\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n accept(visitor) {\n if (this.args) {\n this.args = visitor.visitArray(this.args);\n }\n }\n\n //\n // When evaluating a function call,\n // we either find the function in the functionRegistry,\n // in which case we call it, passing the evaluated arguments,\n // if this returns null or we cannot find the function, we\n // simply print it out as it appeared originally [2].\n //\n // The reason why we evaluate the arguments, is in the case where\n // we try to pass a variable to a function, like: `saturate(@color)`.\n // The function should receive the value, not the variable.\n //\n eval(context) {\n /**\n * Turn off math for calc(), and switch back on for evaluating nested functions\n */\n const currentMathContext = context.mathOn;\n context.mathOn = !this.calc;\n if (this.calc || context.inCalc) {\n context.enterCalc();\n }\n const args = this.args.map(a => a.eval(context));\n if (this.calc || context.inCalc) {\n context.exitCalc();\n }\n context.mathOn = currentMathContext;\n\n let result;\n const funcCaller = new FunctionCaller(this.name, context, this.getIndex(), this.fileInfo());\n\n if (funcCaller.isValid()) {\n try {\n result = funcCaller.call(args);\n } catch (e) {\n throw { \n type: e.type || 'Runtime',\n message: `error evaluating function \\`${this.name}\\`${e.message ? `: ${e.message}` : ''}`,\n index: this.getIndex(), \n filename: this.fileInfo().filename,\n line: e.lineNumber,\n column: e.columnNumber\n };\n }\n\n if (result !== null && result !== undefined) {\n // Results that that are not nodes are cast as Anonymous nodes\n // Falsy values or booleans are returned as empty nodes\n if (!(result instanceof Node)) {\n if (!result || result === true) {\n result = new Anonymous(null); \n }\n else {\n result = new Anonymous(result.toString()); \n }\n \n }\n result._index = this._index;\n result._fileInfo = this._fileInfo;\n return result;\n }\n\n }\n\n return new Call(this.name, args, this.getIndex(), this.fileInfo());\n }\n\n genCSS(context, output) {\n output.add(`${this.name}(`, this.fileInfo(), this.getIndex());\n\n for (let i = 0; i < this.args.length; i++) {\n this.args[i].genCSS(context, output);\n if (i + 1 < this.args.length) {\n output.add(', ');\n }\n }\n\n output.add(')');\n }\n}\n\nCall.prototype.type = 'Call';\nexport default Call;\n","import Node from './node';\nimport Call from './call';\n\nclass Variable extends Node {\n constructor(name, index, currentFileInfo) {\n super();\n\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let variable;\n let name = this.name;\n\n if (name.indexOf('@@') === 0) {\n name = `@${new Variable(name.slice(1), this.getIndex(), this.fileInfo()).eval(context).value}`;\n }\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive variable definition for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n variable = this.find(context.frames, frame => {\n const v = frame.variable(name);\n if (v) {\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n // If in calc, wrap vars in a function call to cascade evaluate args first\n if (context.inCalc) {\n return (new Call('_SELF', [v.value])).eval(context);\n }\n else {\n return v.value.eval(context);\n }\n }\n });\n if (variable) {\n this.evaluating = false;\n return variable;\n } else {\n throw { type: 'Name',\n message: `variable ${name} is undefined`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nVariable.prototype.type = 'Variable';\nexport default Variable;\n","import Node from './node';\nimport Declaration from './declaration';\n\nclass Property extends Node {\n constructor(name, index, currentFileInfo) {\n super();\n\n this.name = name;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n let property;\n const name = this.name;\n // TODO: shorten this reference\n const mergeRules = context.pluginManager.less.visitors.ToCSSVisitor.prototype._mergeRules;\n\n if (this.evaluating) {\n throw { type: 'Name',\n message: `Recursive property reference for ${name}`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n this.evaluating = true;\n\n property = this.find(context.frames, frame => {\n let v;\n const vArr = frame.property(name);\n if (vArr) {\n for (let i = 0; i < vArr.length; i++) {\n v = vArr[i];\n\n vArr[i] = new Declaration(v.name,\n v.value,\n v.important,\n v.merge,\n v.index,\n v.currentFileInfo,\n v.inline,\n v.variable\n );\n }\n mergeRules(vArr);\n\n v = vArr[vArr.length - 1];\n if (v.important) {\n const importantScope = context.importantScope[context.importantScope.length - 1];\n importantScope.important = v.important;\n }\n v = v.value.eval(context);\n return v;\n }\n });\n if (property) {\n this.evaluating = false;\n return property;\n } else {\n throw { type: 'Name',\n message: `Property '${name}' is undefined`,\n filename: this.currentFileInfo.filename,\n index: this.index };\n }\n }\n\n find(obj, fun) {\n for (let i = 0, r; i < obj.length; i++) {\n r = fun.call(obj, obj[i]);\n if (r) { return r; }\n }\n return null;\n }\n}\n\nProperty.prototype.type = 'Property';\nexport default Property;\n","import Node from './node';\n\nclass Attribute extends Node {\n constructor(key, op, value) {\n super();\n\n this.key = key;\n this.op = op;\n this.value = value;\n }\n\n eval(context) {\n return new Attribute(this.key.eval ? this.key.eval(context) : this.key,\n this.op, (this.value && this.value.eval) ? this.value.eval(context) : this.value);\n }\n\n genCSS(context, output) {\n output.add(this.toCSS(context));\n }\n\n toCSS(context) {\n let value = this.key.toCSS ? this.key.toCSS(context) : this.key;\n\n if (this.op) {\n value += this.op;\n value += (this.value.toCSS ? this.value.toCSS(context) : this.value);\n }\n\n return `[${value}]`;\n }\n}\n\nAttribute.prototype.type = 'Attribute';\nexport default Attribute;\n","import Node from './node';\nimport Variable from './variable';\nimport Property from './property';\n\nclass Quoted extends Node {\n constructor(str, content, escaped, index, currentFileInfo) {\n super();\n\n this.escaped = (escaped == null) ? true : escaped;\n this.value = content || '';\n this.quote = str.charAt(0);\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.variableRegex = /@\\{([\\w-]+)\\}/g;\n this.propRegex = /\\$\\{([\\w-]+)\\}/g;\n }\n\n genCSS(context, output) {\n if (!this.escaped) {\n output.add(this.quote, this.fileInfo(), this.getIndex());\n }\n output.add(this.value);\n if (!this.escaped) {\n output.add(this.quote);\n }\n }\n\n containsVariables() {\n return this.value.match(this.variableRegex);\n }\n\n eval(context) {\n const that = this;\n let value = this.value;\n const variableReplacement = (_, name) => {\n const v = new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n const propertyReplacement = (_, name) => {\n const v = new Property(`$${name}`, that.getIndex(), that.fileInfo()).eval(context, true);\n return (v instanceof Quoted) ? v.value : v.toCSS();\n };\n function iterativeReplace(value, regexp, replacementFnc) {\n let evaluatedValue = value;\n do {\n value = evaluatedValue.toString();\n evaluatedValue = value.replace(regexp, replacementFnc);\n } while (value !== evaluatedValue);\n return evaluatedValue;\n }\n value = iterativeReplace(value, this.variableRegex, variableReplacement);\n value = iterativeReplace(value, this.propRegex, propertyReplacement);\n return new Quoted(this.quote + value + this.quote, value, this.escaped, this.getIndex(), this.fileInfo());\n }\n\n compare(other) {\n // when comparing quoted strings allow the quote to differ\n if (other.type === 'Quoted' && !this.escaped && !other.escaped) {\n return Node.numericCompare(this.value, other.value);\n } else {\n return other.toCSS && this.toCSS() === other.toCSS() ? 0 : undefined;\n }\n }\n}\n\nQuoted.prototype.type = 'Quoted';\nexport default Quoted;\n","import Node from './node';\n\nclass URL extends Node {\n constructor(val, index, currentFileInfo, isEvald) {\n super();\n\n this.value = val;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.isEvald = isEvald;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n genCSS(context, output) {\n output.add('url(');\n this.value.genCSS(context, output);\n output.add(')');\n }\n\n eval(context) {\n const val = this.value.eval(context);\n let rootpath;\n\n if (!this.isEvald) {\n // Add the rootpath if the URL requires a rewrite\n rootpath = this.fileInfo() && this.fileInfo().rootpath;\n if (typeof rootpath === 'string' &&\n typeof val.value === 'string' &&\n context.pathRequiresRewrite(val.value)) {\n if (!val.quote) {\n rootpath = escapePath(rootpath);\n }\n val.value = context.rewritePath(val.value, rootpath);\n } else {\n val.value = context.normalizePath(val.value);\n }\n\n // Add url args if enabled\n if (context.urlArgs) {\n if (!val.value.match(/^\\s*data:/)) {\n const delimiter = val.value.indexOf('?') === -1 ? '?' : '&';\n const urlArgs = delimiter + context.urlArgs;\n if (val.value.indexOf('#') !== -1) {\n val.value = val.value.replace('#', `${urlArgs}#`);\n } else {\n val.value += urlArgs;\n }\n }\n }\n }\n\n return new URL(val, this.getIndex(), this.fileInfo(), true);\n }\n}\n\nURL.prototype.type = 'Url';\n\nfunction escapePath(path) {\n return path.replace(/[\\(\\)'\"\\s]/g, match => `\\\\${match}`);\n}\n\nexport default URL;\n","import Ruleset from './ruleset';\nimport Value from './value';\nimport Selector from './selector';\nimport Anonymous from './anonymous';\nimport Expression from './expression';\nimport AtRule from './atrule';\nimport * as utils from '../utils';\n\nclass Media extends AtRule {\n constructor(value, features, index, currentFileInfo, visibilityInfo) {\n super();\n\n this._index = index;\n this._fileInfo = currentFileInfo;\n\n const selectors = (new Selector([], null, null, this._index, this._fileInfo)).createEmptySelectors();\n\n this.features = new Value(features);\n this.rules = [new Ruleset(selectors, value)];\n this.rules[0].allowImports = true;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n this.setParent(selectors, this);\n this.setParent(this.features, this);\n this.setParent(this.rules, this);\n }\n\n isRulesetLike() {\n return true;\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n if (this.rules) {\n this.rules = visitor.visitArray(this.rules);\n }\n }\n\n genCSS(context, output) {\n output.add('@media ', this._fileInfo, this._index);\n this.features.genCSS(context, output);\n this.outputRuleset(context, output, this.rules);\n }\n\n eval(context) {\n if (!context.mediaBlocks) {\n context.mediaBlocks = [];\n context.mediaPath = [];\n }\n\n const media = new Media(null, [], this._index, this._fileInfo, this.visibilityInfo());\n if (this.debugInfo) {\n this.rules[0].debugInfo = this.debugInfo;\n media.debugInfo = this.debugInfo;\n }\n \n media.features = this.features.eval(context);\n\n context.mediaPath.push(media);\n context.mediaBlocks.push(media);\n\n this.rules[0].functionRegistry = context.frames[0].functionRegistry.inherit();\n context.frames.unshift(this.rules[0]);\n media.rules = [this.rules[0].eval(context)];\n context.frames.shift();\n\n context.mediaPath.pop();\n\n return context.mediaPath.length === 0 ? media.evalTop(context) :\n media.evalNested(context);\n }\n\n evalTop(context) {\n let result = this;\n\n // Render all dependent Media blocks.\n if (context.mediaBlocks.length > 1) {\n const selectors = (new Selector([], null, null, this.getIndex(), this.fileInfo())).createEmptySelectors();\n result = new Ruleset(selectors, context.mediaBlocks);\n result.multiMedia = true;\n result.copyVisibilityInfo(this.visibilityInfo());\n this.setParent(result, this);\n }\n\n delete context.mediaBlocks;\n delete context.mediaPath;\n\n return result;\n }\n\n evalNested(context) {\n let i;\n let value;\n const path = context.mediaPath.concat([this]);\n\n // Extract the media-query conditions separated with `,` (OR).\n for (i = 0; i < path.length; i++) {\n value = path[i].features instanceof Value ?\n path[i].features.value : path[i].features;\n path[i] = Array.isArray(value) ? value : [value];\n }\n\n // Trace all permutations to generate the resulting media-query.\n //\n // (a, b and c) with nested (d, e) ->\n // a and d\n // a and e\n // b and c and d\n // b and c and e\n this.features = new Value(this.permute(path).map(path => {\n path = path.map(fragment => fragment.toCSS ? fragment : new Anonymous(fragment));\n\n for (i = path.length - 1; i > 0; i--) {\n path.splice(i, 0, new Anonymous('and'));\n }\n\n return new Expression(path);\n }));\n this.setParent(this.features, this);\n\n // Fake a tree-node that doesn't output anything.\n return new Ruleset([], []);\n }\n\n permute(arr) {\n if (arr.length === 0) {\n return [];\n } else if (arr.length === 1) {\n return arr[0];\n } else {\n const result = [];\n const rest = this.permute(arr.slice(1));\n for (let i = 0; i < rest.length; i++) {\n for (let j = 0; j < arr[0].length; j++) {\n result.push([arr[0][j]].concat(rest[i]));\n }\n }\n return result;\n }\n }\n\n bubbleSelectors(selectors) {\n if (!selectors) {\n return;\n }\n this.rules = [new Ruleset(utils.copyArray(selectors), [this.rules[0]])];\n this.setParent(this.rules, this);\n }\n}\n\nMedia.prototype.type = 'Media';\nexport default Media;\n","import Node from './node';\nimport Media from './media';\nimport URL from './url';\nimport Quoted from './quoted';\nimport Ruleset from './ruleset';\nimport Anonymous from './anonymous';\nimport * as utils from '../utils';\nimport LessError from '../less-error';\n\n//\n// CSS @import node\n//\n// The general strategy here is that we don't want to wait\n// for the parsing to be completed, before we start importing\n// the file. That's because in the context of a browser,\n// most of the time will be spent waiting for the server to respond.\n//\n// On creation, we push the import path to our import queue, though\n// `import,push`, we also pass it a callback, which it'll call once\n// the file has been fetched, and parsed.\n//\nclass Import extends Node {\n constructor(path, features, options, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.options = options;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.path = path;\n this.features = features;\n this.allowRoot = true;\n\n if (this.options.less !== undefined || this.options.inline) {\n this.css = !this.options.less || this.options.inline;\n } else {\n const pathValue = this.getPath();\n if (pathValue && /[#\\.\\&\\?]css([\\?;].*)?$/.test(pathValue)) {\n this.css = true;\n }\n }\n this.copyVisibilityInfo(visibilityInfo);\n this.setParent(this.features, this);\n this.setParent(this.path, this);\n }\n\n accept(visitor) {\n if (this.features) {\n this.features = visitor.visit(this.features);\n }\n this.path = visitor.visit(this.path);\n if (!this.options.isPlugin && !this.options.inline && this.root) {\n this.root = visitor.visit(this.root);\n }\n }\n\n genCSS(context, output) {\n if (this.css && this.path._fileInfo.reference === undefined) {\n output.add('@import ', this._fileInfo, this._index);\n this.path.genCSS(context, output);\n if (this.features) {\n output.add(' ');\n this.features.genCSS(context, output);\n }\n output.add(';');\n }\n }\n\n getPath() {\n return (this.path instanceof URL) ?\n this.path.value.value : this.path.value;\n }\n\n isVariableImport() {\n let path = this.path;\n if (path instanceof URL) {\n path = path.value;\n }\n if (path instanceof Quoted) {\n return path.containsVariables();\n }\n\n return true;\n }\n\n evalForImport(context) {\n let path = this.path;\n\n if (path instanceof URL) {\n path = path.value;\n }\n\n return new Import(path.eval(context), this.features, this.options, this._index, this._fileInfo, this.visibilityInfo());\n }\n\n evalPath(context) {\n const path = this.path.eval(context);\n const fileInfo = this._fileInfo;\n\n if (!(path instanceof URL)) {\n // Add the rootpath if the URL requires a rewrite\n const pathValue = path.value;\n if (fileInfo &&\n pathValue &&\n context.pathRequiresRewrite(pathValue)) {\n path.value = context.rewritePath(pathValue, fileInfo.rootpath);\n } else {\n path.value = context.normalizePath(path.value);\n }\n }\n\n return path;\n }\n\n eval(context) {\n const result = this.doEval(context);\n if (this.options.reference || this.blocksVisibility()) {\n if (result.length || result.length === 0) {\n result.forEach(node => {\n node.addVisibilityBlock();\n }\n );\n } else {\n result.addVisibilityBlock();\n }\n }\n return result;\n }\n\n doEval(context) {\n let ruleset;\n let registry;\n const features = this.features && this.features.eval(context);\n\n if (this.options.isPlugin) {\n if (this.root && this.root.eval) {\n try {\n this.root.eval(context);\n }\n catch (e) {\n e.message = 'Plugin error during evaluation';\n throw new LessError(e, this.root.imports, this.root.filename);\n }\n }\n registry = context.frames[0] && context.frames[0].functionRegistry;\n if ( registry && this.root && this.root.functions ) {\n registry.addMultiple( this.root.functions );\n }\n\n return [];\n }\n\n if (this.skip) {\n if (typeof this.skip === 'function') {\n this.skip = this.skip();\n }\n if (this.skip) {\n return [];\n }\n }\n if (this.options.inline) {\n const contents = new Anonymous(this.root, 0,\n {\n filename: this.importedFilename,\n reference: this.path._fileInfo && this.path._fileInfo.reference\n }, true, true);\n\n return this.features ? new Media([contents], this.features.value) : [contents];\n } else if (this.css) {\n const newImport = new Import(this.evalPath(context), features, this.options, this._index);\n if (!newImport.css && this.error) {\n throw this.error;\n }\n return newImport;\n } else {\n ruleset = new Ruleset(null, utils.copyArray(this.root.rules));\n ruleset.evalImports(context);\n\n return this.features ? new Media(ruleset.rules, this.features.value) : ruleset.rules;\n }\n }\n}\n\nImport.prototype.type = 'Import';\nexport default Import;\n","import Node from './node';\nimport Variable from './variable';\n\nclass JsEvalNode extends Node {\n evaluateJavaScript(expression, context) {\n let result;\n const that = this;\n const evalContext = {};\n\n if (!context.javascriptEnabled) {\n throw { message: 'Inline JavaScript is not enabled. Is it set in your options?',\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n expression = expression.replace(/@\\{([\\w-]+)\\}/g, (_, name) => that.jsify(new Variable(`@${name}`, that.getIndex(), that.fileInfo()).eval(context)));\n\n try {\n expression = new Function(`return (${expression})`);\n } catch (e) {\n throw { message: `JavaScript evaluation error: ${e.message} from \\`${expression}\\`` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n\n const variables = context.frames[0].variables();\n for (const k in variables) {\n if (variables.hasOwnProperty(k)) {\n /* jshint loopfunc:true */\n evalContext[k.slice(1)] = {\n value: variables[k].value,\n toJS: function () {\n return this.value.eval(context).toCSS();\n }\n };\n }\n }\n\n try {\n result = expression.call(evalContext);\n } catch (e) {\n throw { message: `JavaScript evaluation error: '${e.name}: ${e.message.replace(/[\"]/g, '\\'')}'` ,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n return result;\n }\n\n jsify(obj) {\n if (Array.isArray(obj.value) && (obj.value.length > 1)) {\n return `[${obj.value.map(v => v.toCSS()).join(', ')}]`;\n } else {\n return obj.toCSS();\n }\n }\n}\n\nexport default JsEvalNode;\n","import JsEvalNode from './js-eval-node';\nimport Dimension from './dimension';\nimport Quoted from './quoted';\nimport Anonymous from './anonymous';\n\nclass JavaScript extends JsEvalNode {\n constructor(string, escaped, index, currentFileInfo) {\n super();\n\n this.escaped = escaped;\n this.expression = string;\n this._index = index;\n this._fileInfo = currentFileInfo;\n }\n\n eval(context) {\n const result = this.evaluateJavaScript(this.expression, context);\n const type = typeof result;\n\n if (type === 'number' && !isNaN(result)) {\n return new Dimension(result);\n } else if (type === 'string') {\n return new Quoted(`\"${result}\"`, result, this.escaped, this._index);\n } else if (Array.isArray(result)) {\n return new Anonymous(result.join(', '));\n } else {\n return new Anonymous(result);\n }\n }\n}\n\nJavaScript.prototype.type = 'JavaScript';\nexport default JavaScript;\n","import Node from './node';\n\nclass Assignment extends Node {\n constructor(key, val) {\n super();\n\n this.key = key;\n this.value = val;\n }\n\n accept(visitor) {\n this.value = visitor.visit(this.value);\n }\n\n eval(context) {\n if (this.value.eval) {\n return new Assignment(this.key, this.value.eval(context));\n }\n return this;\n }\n\n genCSS(context, output) {\n output.add(`${this.key}=`);\n if (this.value.genCSS) {\n this.value.genCSS(context, output);\n } else {\n output.add(this.value);\n }\n }\n}\n\nAssignment.prototype.type = 'Assignment';\nexport default Assignment;\n","import Node from './node';\n\nclass Condition extends Node {\n constructor(op, l, r, i, negate) {\n super();\n\n this.op = op.trim();\n this.lvalue = l;\n this.rvalue = r;\n this._index = i;\n this.negate = negate;\n }\n\n accept(visitor) {\n this.lvalue = visitor.visit(this.lvalue);\n this.rvalue = visitor.visit(this.rvalue);\n }\n\n eval(context) {\n const result = ((op, a, b) => {\n switch (op) {\n case 'and': return a && b;\n case 'or': return a || b;\n default:\n switch (Node.compare(a, b)) {\n case -1:\n return op === '<' || op === '=<' || op === '<=';\n case 0:\n return op === '=' || op === '>=' || op === '=<' || op === '<=';\n case 1:\n return op === '>' || op === '>=';\n default:\n return false;\n }\n }\n })(this.op, this.lvalue.eval(context), this.rvalue.eval(context));\n\n return this.negate ? !result : result;\n }\n}\n\nCondition.prototype.type = 'Condition';\nexport default Condition;\n","import Node from './node';\n\nclass UnicodeDescriptor extends Node {\n constructor(value) {\n super();\n\n this.value = value;\n }\n}\n\nUnicodeDescriptor.prototype.type = 'UnicodeDescriptor';\n\nexport default UnicodeDescriptor;\n","import Node from './node';\nimport Operation from './operation';\nimport Dimension from './dimension';\n\nclass Negative extends Node {\n constructor(node) {\n super();\n\n this.value = node;\n }\n\n genCSS(context, output) {\n output.add('-');\n this.value.genCSS(context, output);\n }\n\n eval(context) {\n if (context.isMathOn()) {\n return (new Operation('*', [new Dimension(-1), this.value])).eval(context);\n }\n return new Negative(this.value.eval(context));\n }\n}\n\nNegative.prototype.type = 'Negative';\nexport default Negative;\n","import Node from './node';\nimport Selector from './selector';\n\nclass Extend extends Node {\n constructor(selector, option, index, currentFileInfo, visibilityInfo) {\n super();\n\n this.selector = selector;\n this.option = option;\n this.object_id = Extend.next_id++;\n this.parent_ids = [this.object_id];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n\n switch (option) {\n case 'all':\n this.allowBefore = true;\n this.allowAfter = true;\n break;\n default:\n this.allowBefore = false;\n this.allowAfter = false;\n break;\n }\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n this.selector = visitor.visit(this.selector);\n }\n\n eval(context) {\n return new Extend(this.selector.eval(context), this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n clone(context) {\n return new Extend(this.selector, this.option, this.getIndex(), this.fileInfo(), this.visibilityInfo());\n }\n\n // it concatenates (joins) all selectors in selector array\n findSelfSelectors(selectors) {\n let selfElements = [];\n let i;\n let selectorElements;\n\n for (i = 0; i < selectors.length; i++) {\n selectorElements = selectors[i].elements;\n // duplicate the logic in genCSS function inside the selector node.\n // future TODO - move both logics into the selector joiner visitor\n if (i > 0 && selectorElements.length && selectorElements[0].combinator.value === '') {\n selectorElements[0].combinator.value = ' ';\n }\n selfElements = selfElements.concat(selectors[i].elements);\n }\n\n this.selfSelectors = [new Selector(selfElements)];\n this.selfSelectors[0].copyVisibilityInfo(this.visibilityInfo());\n }\n}\n\nExtend.next_id = 0;\n\nExtend.prototype.type = 'Extend';\nexport default Extend;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport DetachedRuleset from './detached-ruleset';\nimport LessError from '../less-error';\n\nclass VariableCall extends Node {\n constructor(variable, index, currentFileInfo) {\n super();\n\n this.variable = variable;\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.allowRoot = true;\n }\n\n eval(context) {\n let rules;\n let detachedRuleset = new Variable(this.variable, this.getIndex(), this.fileInfo()).eval(context);\n const error = new LessError({message: `Could not evaluate variable call ${this.variable}`});\n\n if (!detachedRuleset.ruleset) {\n if (detachedRuleset.rules) {\n rules = detachedRuleset;\n }\n else if (Array.isArray(detachedRuleset)) {\n rules = new Ruleset('', detachedRuleset);\n }\n else if (Array.isArray(detachedRuleset.value)) {\n rules = new Ruleset('', detachedRuleset.value);\n }\n else {\n throw error;\n }\n detachedRuleset = new DetachedRuleset(rules);\n }\n\n if (detachedRuleset.ruleset) {\n return detachedRuleset.callEval(context);\n }\n throw error;\n }\n}\n\nVariableCall.prototype.type = 'VariableCall';\nexport default VariableCall;\n","import Node from './node';\nimport Variable from './variable';\nimport Ruleset from './ruleset';\nimport Selector from './selector';\n\nclass NamespaceValue extends Node {\n constructor(ruleCall, lookups, important, index, fileInfo) {\n super();\n\n this.value = ruleCall;\n this.lookups = lookups;\n this.important = important;\n this._index = index;\n this._fileInfo = fileInfo;\n }\n\n eval(context) {\n let i;\n let j;\n let name;\n let rules = this.value.eval(context);\n\n for (i = 0; i < this.lookups.length; i++) {\n name = this.lookups[i];\n\n /**\n * Eval'd DRs return rulesets.\n * Eval'd mixins return rules, so let's make a ruleset if we need it.\n * We need to do this because of late parsing of values\n */\n if (Array.isArray(rules)) {\n rules = new Ruleset([new Selector()], rules);\n }\n\n if (name === '') {\n rules = rules.lastDeclaration();\n }\n else if (name.charAt(0) === '@') {\n if (name.charAt(1) === '@') {\n name = `@${new Variable(name.substr(1)).eval(context).value}`;\n }\n if (rules.variables) {\n rules = rules.variable(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `variable ${name} not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n }\n else {\n if (name.substring(0, 2) === '$@') {\n name = `$${new Variable(name.substr(1)).eval(context).value}`;\n }\n else {\n name = name.charAt(0) === '$' ? name : `$${name}`;\n }\n if (rules.properties) {\n rules = rules.property(name);\n }\n \n if (!rules) {\n throw { type: 'Name',\n message: `property \"${name.substr(1)}\" not found`,\n filename: this.fileInfo().filename,\n index: this.getIndex() };\n }\n // Properties are an array of values, since a ruleset can have multiple props.\n // We pick the last one (the \"cascaded\" value)\n rules = rules[rules.length - 1];\n }\n\n if (rules.value) {\n rules = rules.eval(context).value;\n }\n if (rules.ruleset) {\n rules = rules.ruleset.eval(context);\n }\n }\n return rules;\n }\n}\n\nNamespaceValue.prototype.type = 'NamespaceValue';\nexport default NamespaceValue;\n","import Selector from './selector';\nimport Element from './element';\nimport Ruleset from './ruleset';\nimport Declaration from './declaration';\nimport DetachedRuleset from './detached-ruleset';\nimport Expression from './expression';\nimport contexts from '../contexts';\nimport * as utils from '../utils';\n\nclass Definition extends Ruleset {\n constructor(name, params, rules, condition, variadic, frames, visibilityInfo) {\n super();\n\n this.name = name || 'anonymous mixin';\n this.selectors = [new Selector([new Element(null, name, false, this._index, this._fileInfo)])];\n this.params = params;\n this.condition = condition;\n this.variadic = variadic;\n this.arity = params.length;\n this.rules = rules;\n this._lookups = {};\n const optionalParameters = [];\n this.required = params.reduce((count, p) => {\n if (!p.name || (p.name && !p.value)) {\n return count + 1;\n }\n else {\n optionalParameters.push(p.name);\n return count;\n }\n }, 0);\n this.optionalParameters = optionalParameters;\n this.frames = frames;\n this.copyVisibilityInfo(visibilityInfo);\n this.allowRoot = true;\n }\n\n accept(visitor) {\n if (this.params && this.params.length) {\n this.params = visitor.visitArray(this.params);\n }\n this.rules = visitor.visitArray(this.rules);\n if (this.condition) {\n this.condition = visitor.visit(this.condition);\n }\n }\n\n evalParams(context, mixinEnv, args, evaldArguments) {\n /* jshint boss:true */\n const frame = new Ruleset(null, null);\n\n let varargs;\n let arg;\n const params = utils.copyArray(this.params);\n let i;\n let j;\n let val;\n let name;\n let isNamedFound;\n let argIndex;\n let argsLength = 0;\n\n if (mixinEnv.frames && mixinEnv.frames[0] && mixinEnv.frames[0].functionRegistry) {\n frame.functionRegistry = mixinEnv.frames[0].functionRegistry.inherit();\n }\n mixinEnv = new contexts.Eval(mixinEnv, [frame].concat(mixinEnv.frames));\n\n if (args) {\n args = utils.copyArray(args);\n argsLength = args.length;\n\n for (i = 0; i < argsLength; i++) {\n arg = args[i];\n if (name = (arg && arg.name)) {\n isNamedFound = false;\n for (j = 0; j < params.length; j++) {\n if (!evaldArguments[j] && name === params[j].name) {\n evaldArguments[j] = arg.value.eval(context);\n frame.prependRule(new Declaration(name, arg.value.eval(context)));\n isNamedFound = true;\n break;\n }\n }\n if (isNamedFound) {\n args.splice(i, 1);\n i--;\n continue;\n } else {\n throw { type: 'Runtime', message: `Named argument for ${this.name} ${args[i].name} not found` };\n }\n }\n }\n }\n argIndex = 0;\n for (i = 0; i < params.length; i++) {\n if (evaldArguments[i]) { continue; }\n\n arg = args && args[argIndex];\n\n if (name = params[i].name) {\n if (params[i].variadic) {\n varargs = [];\n for (j = argIndex; j < argsLength; j++) {\n varargs.push(args[j].value.eval(context));\n }\n frame.prependRule(new Declaration(name, new Expression(varargs).eval(context)));\n } else {\n val = arg && arg.value;\n if (val) {\n // This was a mixin call, pass in a detached ruleset of it's eval'd rules\n if (Array.isArray(val)) {\n val = new DetachedRuleset(new Ruleset('', val));\n }\n else {\n val = val.eval(context);\n }\n } else if (params[i].value) {\n val = params[i].value.eval(mixinEnv);\n frame.resetCache();\n } else {\n throw { type: 'Runtime', message: `wrong number of arguments for ${this.name} (${argsLength} for ${this.arity})` };\n }\n\n frame.prependRule(new Declaration(name, val));\n evaldArguments[i] = val;\n }\n }\n\n if (params[i].variadic && args) {\n for (j = argIndex; j < argsLength; j++) {\n evaldArguments[j] = args[j].value.eval(context);\n }\n }\n argIndex++;\n }\n\n return frame;\n }\n\n makeImportant() {\n const rules = !this.rules ? this.rules : this.rules.map(r => {\n if (r.makeImportant) {\n return r.makeImportant(true);\n } else {\n return r;\n }\n });\n const result = new Definition(this.name, this.params, rules, this.condition, this.variadic, this.frames);\n return result;\n }\n\n eval(context) {\n return new Definition(this.name, this.params, this.rules, this.condition, this.variadic, this.frames || utils.copyArray(context.frames));\n }\n\n evalCall(context, args, important) {\n const _arguments = [];\n const mixinFrames = this.frames ? this.frames.concat(context.frames) : context.frames;\n const frame = this.evalParams(context, new contexts.Eval(context, mixinFrames), args, _arguments);\n let rules;\n let ruleset;\n\n frame.prependRule(new Declaration('@arguments', new Expression(_arguments).eval(context)));\n\n rules = utils.copyArray(this.rules);\n\n ruleset = new Ruleset(null, rules);\n ruleset.originalRuleset = this;\n ruleset = ruleset.eval(new contexts.Eval(context, [this, frame].concat(mixinFrames)));\n if (important) {\n ruleset = ruleset.makeImportant();\n }\n return ruleset;\n }\n\n matchCondition(args, context) {\n if (this.condition && !this.condition.eval(\n new contexts.Eval(context,\n [this.evalParams(context, /* the parameter variables */\n new contexts.Eval(context, this.frames ? this.frames.concat(context.frames) : context.frames), args, [])]\n .concat(this.frames || []) // the parent namespace/mixin frames\n .concat(context.frames)))) { // the current environment frames\n return false;\n }\n return true;\n }\n\n matchArgs(args, context) {\n const allArgsCnt = (args && args.length) || 0;\n let len;\n const optionalParameters = this.optionalParameters;\n const requiredArgsCnt = !args ? 0 : args.reduce((count, p) => {\n if (optionalParameters.indexOf(p.name) < 0) {\n return count + 1;\n } else {\n return count;\n }\n }, 0);\n\n if (!this.variadic) {\n if (requiredArgsCnt < this.required) {\n return false;\n }\n if (allArgsCnt > this.params.length) {\n return false;\n }\n } else {\n if (requiredArgsCnt < (this.required - 1)) {\n return false;\n }\n }\n\n // check patterns\n len = Math.min(requiredArgsCnt, this.arity);\n\n for (let i = 0; i < len; i++) {\n if (!this.params[i].name && !this.params[i].variadic) {\n if (args[i].value.eval(context).toCSS() != this.params[i].value.eval(context).toCSS()) {\n return false;\n }\n }\n }\n return true;\n }\n}\n\nDefinition.prototype.type = 'MixinDefinition';\nDefinition.prototype.evalFirst = true;\nexport default Definition;\n","import Node from './node';\nimport Selector from './selector';\nimport MixinDefinition from './mixin-definition';\nimport defaultFunc from '../functions/default';\n\nclass MixinCall extends Node {\n constructor(elements, args, index, currentFileInfo, important) {\n super();\n\n this.selector = new Selector(elements);\n this.arguments = args || [];\n this._index = index;\n this._fileInfo = currentFileInfo;\n this.important = important;\n this.allowRoot = true;\n this.setParent(this.selector, this);\n }\n\n accept(visitor) {\n if (this.selector) {\n this.selector = visitor.visit(this.selector);\n }\n if (this.arguments.length) {\n this.arguments = visitor.visitArray(this.arguments);\n }\n }\n\n eval(context) {\n let mixins;\n let mixin;\n let mixinPath;\n const args = [];\n let arg;\n let argValue;\n const rules = [];\n let match = false;\n let i;\n let m;\n let f;\n let isRecursive;\n let isOneFound;\n const candidates = [];\n let candidate;\n const conditionResult = [];\n let defaultResult;\n const defFalseEitherCase = -1;\n const defNone = 0;\n const defTrue = 1;\n const defFalse = 2;\n let count;\n let originalRuleset;\n let noArgumentsFilter;\n\n this.selector = this.selector.eval(context);\n\n function calcDefGroup(mixin, mixinPath) {\n let f;\n let p;\n let namespace;\n\n for (f = 0; f < 2; f++) {\n conditionResult[f] = true;\n defaultFunc.value(f);\n for (p = 0; p < mixinPath.length && conditionResult[f]; p++) {\n namespace = mixinPath[p];\n if (namespace.matchCondition) {\n conditionResult[f] = conditionResult[f] && namespace.matchCondition(null, context);\n }\n }\n if (mixin.matchCondition) {\n conditionResult[f] = conditionResult[f] && mixin.matchCondition(args, context);\n }\n }\n if (conditionResult[0] || conditionResult[1]) {\n if (conditionResult[0] != conditionResult[1]) {\n return conditionResult[1] ?\n defTrue : defFalse;\n }\n\n return defNone;\n }\n return defFalseEitherCase;\n }\n\n for (i = 0; i < this.arguments.length; i++) {\n arg = this.arguments[i];\n argValue = arg.value.eval(context);\n if (arg.expand && Array.isArray(argValue.value)) {\n argValue = argValue.value;\n for (m = 0; m < argValue.length; m++) {\n args.push({value: argValue[m]});\n }\n } else {\n args.push({name: arg.name, value: argValue});\n }\n }\n\n noArgumentsFilter = rule => rule.matchArgs(null, context);\n\n for (i = 0; i < context.frames.length; i++) {\n if ((mixins = context.frames[i].find(this.selector, null, noArgumentsFilter)).length > 0) {\n isOneFound = true;\n\n // To make `default()` function independent of definition order we have two \"subpasses\" here.\n // At first we evaluate each guard *twice* (with `default() == true` and `default() == false`),\n // and build candidate list with corresponding flags. Then, when we know all possible matches,\n // we make a final decision.\n\n for (m = 0; m < mixins.length; m++) {\n mixin = mixins[m].rule;\n mixinPath = mixins[m].path;\n isRecursive = false;\n for (f = 0; f < context.frames.length; f++) {\n if ((!(mixin instanceof MixinDefinition)) && mixin === (context.frames[f].originalRuleset || context.frames[f])) {\n isRecursive = true;\n break;\n }\n }\n if (isRecursive) {\n continue;\n }\n\n if (mixin.matchArgs(args, context)) {\n candidate = {mixin, group: calcDefGroup(mixin, mixinPath)};\n\n if (candidate.group !== defFalseEitherCase) {\n candidates.push(candidate);\n }\n\n match = true;\n }\n }\n\n defaultFunc.reset();\n\n count = [0, 0, 0];\n for (m = 0; m < candidates.length; m++) {\n count[candidates[m].group]++;\n }\n\n if (count[defNone] > 0) {\n defaultResult = defFalse;\n } else {\n defaultResult = defTrue;\n if ((count[defTrue] + count[defFalse]) > 1) {\n throw { type: 'Runtime',\n message: `Ambiguous use of \\`default()\\` found when matching for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n for (m = 0; m < candidates.length; m++) {\n candidate = candidates[m].group;\n if ((candidate === defNone) || (candidate === defaultResult)) {\n try {\n mixin = candidates[m].mixin;\n if (!(mixin instanceof MixinDefinition)) {\n originalRuleset = mixin.originalRuleset || mixin;\n mixin = new MixinDefinition('', [], mixin.rules, null, false, null, originalRuleset.visibilityInfo());\n mixin.originalRuleset = originalRuleset;\n }\n const newRules = mixin.evalCall(context, args, this.important).rules;\n this._setVisibilityToReplacement(newRules);\n Array.prototype.push.apply(rules, newRules);\n } catch (e) {\n throw { message: e.message, index: this.getIndex(), filename: this.fileInfo().filename, stack: e.stack };\n }\n }\n }\n\n if (match) {\n return rules;\n }\n }\n }\n if (isOneFound) {\n throw { type: 'Runtime',\n message: `No matching definition was found for \\`${this.format(args)}\\``,\n index: this.getIndex(), filename: this.fileInfo().filename };\n } else {\n throw { type: 'Name',\n message: `${this.selector.toCSS().trim()} is undefined`,\n index: this.getIndex(), filename: this.fileInfo().filename };\n }\n }\n\n _setVisibilityToReplacement(replacement) {\n let i;\n let rule;\n if (this.blocksVisibility()) {\n for (i = 0; i < replacement.length; i++) {\n rule = replacement[i];\n rule.addVisibilityBlock();\n }\n }\n }\n\n format(args) {\n return `${this.selector.toCSS().trim()}(${args ? args.map(a => {\n let argValue = '';\n if (a.name) {\n argValue += `${a.name}:`;\n }\n if (a.value.toCSS) {\n argValue += a.value.toCSS();\n } else {\n argValue += '???';\n }\n return argValue;\n }).join(', ') : ''})`;\n }\n}\n\nMixinCall.prototype.type = 'MixinCall';\nexport default MixinCall;\n","const tree = Object.create(null);\n\nimport Node from './node';\nimport Color from './color';\nimport AtRule from './atrule';\nimport DetachedRuleset from './detached-ruleset';\nimport Operation from './operation';\nimport Dimension from './dimension';\nimport Unit from './unit';\nimport Keyword from './keyword';\nimport Variable from './variable';\nimport Property from './property';\nimport Ruleset from './ruleset';\nimport Element from './element';\nimport Attribute from './attribute';\nimport Combinator from './combinator';\nimport Selector from './selector';\nimport Quoted from './quoted';\nimport Expression from './expression';\nimport Declaration from './declaration';\nimport Call from './call';\nimport URL from './url';\nimport Import from './import';\nimport Comment from './comment';\nimport Anonymous from './anonymous';\nimport Value from './value';\nimport JavaScript from './javascript';\nimport Assignment from './assignment';\nimport Condition from './condition';\nimport Paren from './paren';\nimport Media from './media';\nimport UnicodeDescriptor from './unicode-descriptor';\nimport Negative from './negative';\nimport Extend from './extend';\nimport VariableCall from './variable-call';\nimport NamespaceValue from './namespace-value';\n\n// mixins\nimport MixinCall from './mixin-call';\nimport MixinDefinition from './mixin-definition';\n\nexport default {\n Node, Color, AtRule, DetachedRuleset, Operation,\n Dimension, Unit, Keyword, Variable, Property,\n Ruleset, Element, Attribute, Combinator, Selector,\n Quoted, Expression, Declaration, Call, URL, Import,\n Comment, Anonymous, Value, JavaScript, Assignment,\n Condition, Paren, Media, UnicodeDescriptor, Negative,\n Extend, VariableCall, NamespaceValue,\n mixin: {\n Call: MixinCall,\n Definition: MixinDefinition\n }\n};","export default {\n error: function(msg) {\n this._fireEvent('error', msg);\n },\n warn: function(msg) {\n this._fireEvent('warn', msg);\n },\n info: function(msg) {\n this._fireEvent('info', msg);\n },\n debug: function(msg) {\n this._fireEvent('debug', msg);\n },\n addListener: function(listener) {\n this._listeners.push(listener);\n },\n removeListener: function(listener) {\n for (let i = 0; i < this._listeners.length; i++) {\n if (this._listeners[i] === listener) {\n this._listeners.splice(i, 1);\n return;\n }\n }\n },\n _fireEvent: function(type, msg) {\n for (let i = 0; i < this._listeners.length; i++) {\n const logFunction = this._listeners[i][type];\n if (logFunction) {\n logFunction(msg);\n }\n }\n },\n _listeners: []\n};\n","/**\n * @todo Document why this abstraction exists, and the relationship between\n * environment, file managers, and plugin manager\n */\n\nimport logger from '../logger';\n\nclass environment {\n constructor(externalEnvironment, fileManagers) {\n this.fileManagers = fileManagers || [];\n externalEnvironment = externalEnvironment || {};\n\n const optionalFunctions = ['encodeBase64', 'mimeLookup', 'charsetLookup', 'getSourceMapGenerator'];\n const requiredFunctions = [];\n const functions = requiredFunctions.concat(optionalFunctions);\n\n for (let i = 0; i < functions.length; i++) {\n const propName = functions[i];\n const environmentFunc = externalEnvironment[propName];\n if (environmentFunc) {\n this[propName] = environmentFunc.bind(externalEnvironment);\n } else if (i < requiredFunctions.length) {\n this.warn(`missing required function in environment - ${propName}`);\n }\n }\n }\n\n getFileManager(filename, currentDirectory, options, environment, isSync) {\n\n if (!filename) {\n logger.warn('getFileManager called with no filename.. Please report this issue. continuing.');\n }\n if (currentDirectory == null) {\n logger.warn('getFileManager called with null directory.. Please report this issue. continuing.');\n }\n\n let fileManagers = this.fileManagers;\n if (options.pluginManager) {\n fileManagers = [].concat(fileManagers).concat(options.pluginManager.getFileManagers());\n }\n for (let i = fileManagers.length - 1; i >= 0 ; i--) {\n const fileManager = fileManagers[i];\n if (fileManager[isSync ? 'supportsSync' : 'supports'](filename, currentDirectory, options, environment)) {\n return fileManager;\n }\n }\n return null;\n }\n\n addFileManager(fileManager) {\n this.fileManagers.push(fileManager);\n }\n\n clearFileManagers() {\n this.fileManagers = [];\n }\n}\n\nexport default environment;\n","class AbstractFileManager {\n getPath(filename) {\n let j = filename.lastIndexOf('?');\n if (j > 0) {\n filename = filename.slice(0, j);\n }\n j = filename.lastIndexOf('/');\n if (j < 0) {\n j = filename.lastIndexOf('\\\\');\n }\n if (j < 0) {\n return '';\n }\n return filename.slice(0, j + 1);\n }\n\n tryAppendExtension(path, ext) {\n return /(\\.[a-z]*$)|([\\?;].*)$/.test(path) ? path : path + ext;\n }\n\n tryAppendLessExtension(path) {\n return this.tryAppendExtension(path, '.less');\n };\n\n supportsSync() { return false; }\n\n alwaysMakePathsAbsolute() { return false; }\n\n isPathAbsolute(filename) {\n return (/^(?:[a-z-]+:|\\/|\\\\|#)/i).test(filename);\n }\n // TODO: pull out / replace?\n join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return basePath + laterPath;\n };\n\n pathDiff(url, baseUrl) {\n // diff between two paths to create a relative path\n const urlParts = this.extractUrlParts(url);\n const baseUrlParts = this.extractUrlParts(baseUrl);\n\n let i;\n let max;\n let urlDirectories;\n let baseUrlDirectories;\n let diff = '';\n if (urlParts.hostPart !== baseUrlParts.hostPart) {\n return '';\n }\n max = Math.max(baseUrlParts.directories.length, urlParts.directories.length);\n for (i = 0; i < max; i++) {\n if (baseUrlParts.directories[i] !== urlParts.directories[i]) { break; }\n }\n baseUrlDirectories = baseUrlParts.directories.slice(i);\n urlDirectories = urlParts.directories.slice(i);\n for (i = 0; i < baseUrlDirectories.length - 1; i++) {\n diff += '../';\n }\n for (i = 0; i < urlDirectories.length - 1; i++) {\n diff += `${urlDirectories[i]}/`;\n }\n return diff;\n };\n // helper function, not part of API\n extractUrlParts(url, baseUrl) {\n // urlParts[1] = protocol://hostname/ OR /\n // urlParts[2] = / if path relative to host base\n // urlParts[3] = directories\n // urlParts[4] = filename\n // urlParts[5] = parameters\n\n const urlPartsRegex = /^((?:[a-z-]+:)?\\/{2}(?:[^\\/\\?#]*\\/)|([\\/\\\\]))?((?:[^\\/\\\\\\?#]*[\\/\\\\])*)([^\\/\\\\\\?#]*)([#\\?].*)?$/i;\n\n const urlParts = url.match(urlPartsRegex);\n const returner = {};\n let rawDirectories = [];\n const directories = [];\n let i;\n let baseUrlParts;\n\n if (!urlParts) {\n throw new Error(`Could not parse sheet href - '${url}'`);\n }\n\n // Stylesheets in IE don't always return the full path\n if (baseUrl && (!urlParts[1] || urlParts[2])) {\n baseUrlParts = baseUrl.match(urlPartsRegex);\n if (!baseUrlParts) {\n throw new Error(`Could not parse page url - '${baseUrl}'`);\n }\n urlParts[1] = urlParts[1] || baseUrlParts[1] || '';\n if (!urlParts[2]) {\n urlParts[3] = baseUrlParts[3] + urlParts[3];\n }\n }\n\n if (urlParts[3]) {\n rawDirectories = urlParts[3].replace(/\\\\/g, '/').split('/');\n\n // collapse '..' and skip '.'\n for (i = 0; i < rawDirectories.length; i++) {\n\n if (rawDirectories[i] === '..') {\n directories.pop();\n }\n else if (rawDirectories[i] !== '.') {\n directories.push(rawDirectories[i]);\n }\n \n }\n }\n\n returner.hostPart = urlParts[1];\n returner.directories = directories;\n returner.rawPath = (urlParts[1] || '') + rawDirectories.join('/');\n returner.path = (urlParts[1] || '') + directories.join('/');\n returner.filename = urlParts[4];\n returner.fileUrl = returner.path + (urlParts[4] || '');\n returner.url = returner.fileUrl + (urlParts[5] || '');\n return returner;\n };\n}\n\nexport default AbstractFileManager;\n","import functionRegistry from '../functions/function-registry';\nimport LessError from '../less-error';\n\nclass AbstractPluginLoader {\n constructor() {\n // Implemented by Node.js plugin loader\n this.require = () => null\n }\n\n evalPlugin(contents, context, imports, pluginOptions, fileInfo) {\n let loader;\n let registry;\n let pluginObj;\n let localModule;\n let pluginManager;\n let filename;\n let result;\n\n pluginManager = context.pluginManager;\n\n if (fileInfo) {\n if (typeof fileInfo === 'string') {\n filename = fileInfo;\n }\n else {\n filename = fileInfo.filename;\n }\n }\n const shortname = (new this.less.FileManager()).extractUrlParts(filename).filename;\n\n if (filename) {\n pluginObj = pluginManager.get(filename);\n\n if (pluginObj) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n return pluginObj;\n }\n }\n localModule = {\n exports: {},\n pluginManager,\n fileInfo\n };\n registry = functionRegistry.create();\n\n const registerPlugin = obj => {\n pluginObj = obj;\n };\n\n try {\n loader = new Function('module', 'require', 'registerPlugin', 'functions', 'tree', 'less', 'fileInfo', contents);\n loader(localModule, this.require(filename), registerPlugin, registry, this.less.tree, this.less, fileInfo);\n }\n catch (e) {\n return new LessError(e, imports, filename);\n }\n\n if (!pluginObj) {\n pluginObj = localModule.exports;\n }\n pluginObj = this.validatePlugin(pluginObj, filename, shortname);\n\n if (pluginObj instanceof LessError) {\n return pluginObj;\n }\n\n if (pluginObj) {\n pluginObj.imports = imports;\n pluginObj.filename = filename;\n\n // For < 3.x (or unspecified minVersion) - setOptions() before install()\n if (!pluginObj.minVersion || this.compareVersion('3.0.0', pluginObj.minVersion) < 0) {\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n\n if (result) {\n return result;\n }\n }\n\n // Run on first load\n pluginManager.addPlugin(pluginObj, fileInfo.filename, registry);\n pluginObj.functions = registry.getLocalFunctions();\n\n // Need to call setOptions again because the pluginObj might have functions\n result = this.trySetOptions(pluginObj, filename, shortname, pluginOptions);\n if (result) {\n return result;\n }\n\n // Run every @plugin call\n try {\n if (pluginObj.use) {\n pluginObj.use.call(this.context, pluginObj);\n }\n }\n catch (e) {\n e.message = e.message || 'Error during @plugin call';\n return new LessError(e, imports, filename);\n }\n\n }\n else {\n return new LessError({ message: 'Not a valid plugin' }, imports, filename);\n }\n\n return pluginObj;\n }\n\n trySetOptions(plugin, filename, name, options) {\n if (options && !plugin.setOptions) {\n return new LessError({\n message: `Options have been provided but the plugin ${name} does not support any options.`\n });\n }\n try {\n plugin.setOptions && plugin.setOptions(options);\n }\n catch (e) {\n return new LessError(e);\n }\n }\n\n validatePlugin(plugin, filename, name) {\n if (plugin) {\n // support plugins being a function\n // so that the plugin can be more usable programmatically\n if (typeof plugin === 'function') {\n plugin = new plugin();\n }\n\n if (plugin.minVersion) {\n if (this.compareVersion(plugin.minVersion, this.less.version) < 0) {\n return new LessError({\n message: `Plugin ${name} requires version ${this.versionToString(plugin.minVersion)}`\n });\n }\n }\n return plugin;\n }\n return null;\n }\n\n compareVersion(aVersion, bVersion) {\n if (typeof aVersion === 'string') {\n aVersion = aVersion.match(/^(\\d+)\\.?(\\d+)?\\.?(\\d+)?/);\n aVersion.shift();\n }\n for (let i = 0; i < aVersion.length; i++) {\n if (aVersion[i] !== bVersion[i]) {\n return parseInt(aVersion[i]) > parseInt(bVersion[i]) ? -1 : 1;\n }\n }\n return 0;\n }\n\n versionToString(version) {\n let versionString = '';\n for (let i = 0; i < version.length; i++) {\n versionString += (versionString ? '.' : '') + version[i];\n }\n return versionString;\n }\n\n printUsage(plugins) {\n for (let i = 0; i < plugins.length; i++) {\n const plugin = plugins[i];\n if (plugin.printUsage) {\n plugin.printUsage();\n }\n }\n }\n}\n\nexport default AbstractPluginLoader;\n\n","import tree from '../tree';\nconst _visitArgs = { visitDeeper: true };\nlet _hasIndexed = false;\n\nfunction _noop(node) {\n return node;\n}\n\nfunction indexNodeTypes(parent, ticker) {\n // add .typeIndex to tree node types for lookup table\n let key;\n\n let child;\n for (key in parent) { \n /* eslint guard-for-in: 0 */\n child = parent[key];\n switch (typeof child) {\n case 'function':\n // ignore bound functions directly on tree which do not have a prototype\n // or aren't nodes\n if (child.prototype && child.prototype.type) {\n child.prototype.typeIndex = ticker++;\n }\n break;\n case 'object':\n ticker = indexNodeTypes(child, ticker);\n break;\n \n }\n }\n return ticker;\n}\n\nclass Visitor {\n constructor(implementation) {\n this._implementation = implementation;\n this._visitInCache = {};\n this._visitOutCache = {};\n\n if (!_hasIndexed) {\n indexNodeTypes(tree, 1);\n _hasIndexed = true;\n }\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n\n const nodeTypeIndex = node.typeIndex;\n if (!nodeTypeIndex) {\n // MixinCall args aren't a node type?\n if (node.value && node.value.typeIndex) {\n this.visit(node.value);\n }\n return node;\n }\n\n const impl = this._implementation;\n let func = this._visitInCache[nodeTypeIndex];\n let funcOut = this._visitOutCache[nodeTypeIndex];\n const visitArgs = _visitArgs;\n let fnName;\n\n visitArgs.visitDeeper = true;\n\n if (!func) {\n fnName = `visit${node.type}`;\n func = impl[fnName] || _noop;\n funcOut = impl[`${fnName}Out`] || _noop;\n this._visitInCache[nodeTypeIndex] = func;\n this._visitOutCache[nodeTypeIndex] = funcOut;\n }\n\n if (func !== _noop) {\n const newNode = func.call(impl, node, visitArgs);\n if (node && impl.isReplacing) {\n node = newNode;\n }\n }\n\n if (visitArgs.visitDeeper && node && node.accept) {\n node.accept(this);\n }\n\n if (funcOut != _noop) {\n funcOut.call(impl, node);\n }\n\n return node;\n }\n\n visitArray(nodes, nonReplacing) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n\n // Non-replacing\n if (nonReplacing || !this._implementation.isReplacing) {\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n // Replacing\n const out = [];\n for (i = 0; i < cnt; i++) {\n const evald = this.visit(nodes[i]);\n if (evald === undefined) { continue; }\n if (!evald.splice) {\n out.push(evald);\n } else if (evald.length) {\n this.flatten(evald, out);\n }\n }\n return out;\n }\n\n flatten(arr, out) {\n if (!out) {\n out = [];\n }\n\n let cnt;\n let i;\n let item;\n let nestedCnt;\n let j;\n let nestedItem;\n\n for (i = 0, cnt = arr.length; i < cnt; i++) {\n item = arr[i];\n if (item === undefined) {\n continue;\n }\n if (!item.splice) {\n out.push(item);\n continue;\n }\n\n for (j = 0, nestedCnt = item.length; j < nestedCnt; j++) {\n nestedItem = item[j];\n if (nestedItem === undefined) {\n continue;\n }\n if (!nestedItem.splice) {\n out.push(nestedItem);\n } else if (nestedItem.length) {\n this.flatten(nestedItem, out);\n }\n }\n }\n\n return out;\n }\n}\n\nexport default Visitor;\n","class ImportSequencer {\n constructor(onSequencerEmpty) {\n this.imports = [];\n this.variableImports = [];\n this._onSequencerEmpty = onSequencerEmpty;\n this._currentDepth = 0;\n }\n\n addImport(callback) {\n const importSequencer = this;\n\n const importItem = {\n callback,\n args: null,\n isReady: false\n };\n\n this.imports.push(importItem);\n return function(...args) {\n importItem.args = Array.prototype.slice.call(args, 0);\n importItem.isReady = true;\n importSequencer.tryRun();\n };\n }\n\n addVariableImport(callback) {\n this.variableImports.push(callback);\n }\n\n tryRun() {\n this._currentDepth++;\n try {\n while (true) {\n while (this.imports.length > 0) {\n const importItem = this.imports[0];\n if (!importItem.isReady) {\n return;\n }\n this.imports = this.imports.slice(1);\n importItem.callback.apply(null, importItem.args);\n }\n if (this.variableImports.length === 0) {\n break;\n }\n const variableImport = this.variableImports[0];\n this.variableImports = this.variableImports.slice(1);\n variableImport();\n }\n } finally {\n this._currentDepth--;\n }\n if (this._currentDepth === 0 && this._onSequencerEmpty) {\n this._onSequencerEmpty();\n }\n }\n}\n\nexport default ImportSequencer;\n","import contexts from '../contexts';\nimport Visitor from './visitor';\nimport ImportSequencer from './import-sequencer';\nimport * as utils from '../utils';\n\nconst ImportVisitor = function(importer, finish) {\n\n this._visitor = new Visitor(this);\n this._importer = importer;\n this._finish = finish;\n this.context = new contexts.Eval();\n this.importCount = 0;\n this.onceFileDetectionMap = {};\n this.recursionDetector = {};\n this._sequencer = new ImportSequencer(this._onSequencerEmpty.bind(this));\n};\n\nImportVisitor.prototype = {\n isReplacing: false,\n run: function (root) {\n try {\n // process the contents\n this._visitor.visit(root);\n }\n catch (e) {\n this.error = e;\n }\n\n this.isFinished = true;\n this._sequencer.tryRun();\n },\n _onSequencerEmpty: function() {\n if (!this.isFinished) {\n return;\n }\n this._finish(this.error);\n },\n visitImport: function (importNode, visitArgs) {\n const inlineCSS = importNode.options.inline;\n\n if (!importNode.css || inlineCSS) {\n\n const context = new contexts.Eval(this.context, utils.copyArray(this.context.frames));\n const importParent = context.frames[0];\n\n this.importCount++;\n if (importNode.isVariableImport()) {\n this._sequencer.addVariableImport(this.processImportNode.bind(this, importNode, context, importParent));\n } else {\n this.processImportNode(importNode, context, importParent);\n }\n }\n visitArgs.visitDeeper = false;\n },\n processImportNode: function(importNode, context, importParent) {\n let evaldImportNode;\n const inlineCSS = importNode.options.inline;\n\n try {\n evaldImportNode = importNode.evalForImport(context);\n } catch (e) {\n if (!e.filename) { e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename; }\n // attempt to eval properly and treat as css\n importNode.css = true;\n // if that fails, this error will be thrown\n importNode.error = e;\n }\n\n if (evaldImportNode && (!evaldImportNode.css || inlineCSS)) {\n if (evaldImportNode.options.multiple) {\n context.importMultiple = true;\n }\n\n // try appending if we haven't determined if it is css or not\n const tryAppendLessExtension = evaldImportNode.css === undefined;\n\n for (let i = 0; i < importParent.rules.length; i++) {\n if (importParent.rules[i] === importNode) {\n importParent.rules[i] = evaldImportNode;\n break;\n }\n }\n\n const onImported = this.onImported.bind(this, evaldImportNode, context);\n const sequencedOnImported = this._sequencer.addImport(onImported);\n\n this._importer.push(evaldImportNode.getPath(), tryAppendLessExtension, evaldImportNode.fileInfo(),\n evaldImportNode.options, sequencedOnImported);\n } else {\n this.importCount--;\n if (this.isFinished) {\n this._sequencer.tryRun();\n }\n }\n },\n onImported: function (importNode, context, e, root, importedAtRoot, fullPath) {\n if (e) {\n if (!e.filename) {\n e.index = importNode.getIndex(); e.filename = importNode.fileInfo().filename;\n }\n this.error = e;\n }\n\n const importVisitor = this;\n const inlineCSS = importNode.options.inline;\n const isPlugin = importNode.options.isPlugin;\n const isOptional = importNode.options.optional;\n const duplicateImport = importedAtRoot || fullPath in importVisitor.recursionDetector;\n\n if (!context.importMultiple) {\n if (duplicateImport) {\n importNode.skip = true;\n } else {\n importNode.skip = () => {\n if (fullPath in importVisitor.onceFileDetectionMap) {\n return true;\n }\n importVisitor.onceFileDetectionMap[fullPath] = true;\n return false;\n };\n }\n }\n\n if (!fullPath && isOptional) {\n importNode.skip = true;\n }\n\n if (root) {\n importNode.root = root;\n importNode.importedFilename = fullPath;\n\n if (!inlineCSS && !isPlugin && (context.importMultiple || !duplicateImport)) {\n importVisitor.recursionDetector[fullPath] = true;\n\n const oldContext = this.context;\n this.context = context;\n try {\n this._visitor.visit(root);\n } catch (e) {\n this.error = e;\n }\n this.context = oldContext;\n }\n }\n\n importVisitor.importCount--;\n\n if (importVisitor.isFinished) {\n importVisitor._sequencer.tryRun();\n }\n },\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.unshift(declNode);\n } else {\n visitArgs.visitDeeper = false;\n }\n },\n visitDeclarationOut: function(declNode) {\n if (declNode.value.type === 'DetachedRuleset') {\n this.context.frames.shift();\n }\n },\n visitAtRule: function (atRuleNode, visitArgs) {\n this.context.frames.unshift(atRuleNode);\n },\n visitAtRuleOut: function (atRuleNode) {\n this.context.frames.shift();\n },\n visitMixinDefinition: function (mixinDefinitionNode, visitArgs) {\n this.context.frames.unshift(mixinDefinitionNode);\n },\n visitMixinDefinitionOut: function (mixinDefinitionNode) {\n this.context.frames.shift();\n },\n visitRuleset: function (rulesetNode, visitArgs) {\n this.context.frames.unshift(rulesetNode);\n },\n visitRulesetOut: function (rulesetNode) {\n this.context.frames.shift();\n },\n visitMedia: function (mediaNode, visitArgs) {\n this.context.frames.unshift(mediaNode.rules[0]);\n },\n visitMediaOut: function (mediaNode) {\n this.context.frames.shift();\n }\n};\nexport default ImportVisitor;\n","class SetTreeVisibilityVisitor {\n constructor(visible) {\n this.visible = visible;\n }\n\n run(root) {\n this.visit(root);\n }\n\n visitArray(nodes) {\n if (!nodes) {\n return nodes;\n }\n\n const cnt = nodes.length;\n let i;\n for (i = 0; i < cnt; i++) {\n this.visit(nodes[i]);\n }\n return nodes;\n }\n\n visit(node) {\n if (!node) {\n return node;\n }\n if (node.constructor === Array) {\n return this.visitArray(node);\n }\n\n if (!node.blocksVisibility || node.blocksVisibility()) {\n return node;\n }\n if (this.visible) {\n node.ensureVisibility();\n } else {\n node.ensureInvisibility();\n }\n\n node.accept(this);\n return node;\n }\n}\n\nexport default SetTreeVisibilityVisitor;","import tree from '../tree';\nimport Visitor from './visitor';\nimport logger from '../logger';\nimport * as utils from '../utils';\n\n/* jshint loopfunc:true */\n\nclass ExtendFinderVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n this.contexts = [];\n this.allExtendsStack = [[]];\n }\n\n run(root) {\n root = this._visitor.visit(root);\n root.allExtends = this.allExtendsStack[0];\n return root;\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n\n let i;\n let j;\n let extend;\n const allSelectorsExtendList = [];\n let extendList;\n\n // get &:extend(.a); rules which apply to all selectors in this ruleset\n const rules = rulesetNode.rules;\n\n const ruleCnt = rules ? rules.length : 0;\n for (i = 0; i < ruleCnt; i++) {\n if (rulesetNode.rules[i] instanceof tree.Extend) {\n allSelectorsExtendList.push(rules[i]);\n rulesetNode.extendOnEveryPath = true;\n }\n }\n\n // now find every selector and apply the extends that apply to all extends\n // and the ones which apply to an individual extend\n const paths = rulesetNode.paths;\n for (i = 0; i < paths.length; i++) {\n const selectorPath = paths[i];\n const selector = selectorPath[selectorPath.length - 1];\n const selExtendList = selector.extendList;\n\n extendList = selExtendList ? utils.copyArray(selExtendList).concat(allSelectorsExtendList)\n : allSelectorsExtendList;\n\n if (extendList) {\n extendList = extendList.map(allSelectorsExtend => allSelectorsExtend.clone());\n }\n\n for (j = 0; j < extendList.length; j++) {\n this.foundExtends = true;\n extend = extendList[j];\n extend.findSelfSelectors(selectorPath);\n extend.ruleset = rulesetNode;\n if (j === 0) { extend.firstExtendOnThisSelectorPath = true; }\n this.allExtendsStack[this.allExtendsStack.length - 1].push(extend);\n }\n }\n\n this.contexts.push(rulesetNode.selectors);\n }\n\n visitRulesetOut(rulesetNode) {\n if (!rulesetNode.root) {\n this.contexts.length = this.contexts.length - 1;\n }\n }\n\n visitMedia(mediaNode, visitArgs) {\n mediaNode.allExtends = [];\n this.allExtendsStack.push(mediaNode.allExtends);\n }\n\n visitMediaOut(mediaNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n atRuleNode.allExtends = [];\n this.allExtendsStack.push(atRuleNode.allExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n this.allExtendsStack.length = this.allExtendsStack.length - 1;\n }\n}\n\nclass ProcessExtendsVisitor {\n constructor() {\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n const extendFinder = new ExtendFinderVisitor();\n this.extendIndices = {};\n extendFinder.run(root);\n if (!extendFinder.foundExtends) { return root; }\n root.allExtends = root.allExtends.concat(this.doExtendChaining(root.allExtends, root.allExtends));\n this.allExtendsStack = [root.allExtends];\n const newRoot = this._visitor.visit(root);\n this.checkExtendsForNonMatched(root.allExtends);\n return newRoot;\n }\n\n checkExtendsForNonMatched(extendList) {\n const indices = this.extendIndices;\n extendList.filter(extend => !extend.hasFoundMatches && extend.parent_ids.length == 1).forEach(extend => {\n let selector = '_unknown_';\n try {\n selector = extend.selector.toCSS({});\n }\n catch (_) {}\n\n if (!indices[`${extend.index} ${selector}`]) {\n indices[`${extend.index} ${selector}`] = true;\n logger.warn(`extend '${selector}' has no matches`);\n }\n });\n }\n\n doExtendChaining(extendsList, extendsListTarget, iterationCount) {\n //\n // chaining is different from normal extension.. if we extend an extend then we are not just copying, altering\n // and pasting the selector we would do normally, but we are also adding an extend with the same target selector\n // this means this new extend can then go and alter other extends\n //\n // this method deals with all the chaining work - without it, extend is flat and doesn't work on other extend selectors\n // this is also the most expensive.. and a match on one selector can cause an extension of a selector we had already\n // processed if we look at each selector at a time, as is done in visitRuleset\n\n let extendIndex;\n\n let targetExtendIndex;\n let matches;\n const extendsToAdd = [];\n let newSelector;\n const extendVisitor = this;\n let selectorPath;\n let extend;\n let targetExtend;\n let newExtend;\n\n iterationCount = iterationCount || 0;\n\n // loop through comparing every extend with every target extend.\n // a target extend is the one on the ruleset we are looking at copy/edit/pasting in place\n // e.g. .a:extend(.b) {} and .b:extend(.c) {} then the first extend extends the second one\n // and the second is the target.\n // the separation into two lists allows us to process a subset of chains with a bigger set, as is the\n // case when processing media queries\n for (extendIndex = 0; extendIndex < extendsList.length; extendIndex++) {\n for (targetExtendIndex = 0; targetExtendIndex < extendsListTarget.length; targetExtendIndex++) {\n\n extend = extendsList[extendIndex];\n targetExtend = extendsListTarget[targetExtendIndex];\n\n // look for circular references\n if ( extend.parent_ids.indexOf( targetExtend.object_id ) >= 0 ) { continue; }\n\n // find a match in the target extends self selector (the bit before :extend)\n selectorPath = [targetExtend.selfSelectors[0]];\n matches = extendVisitor.findMatch(extend, selectorPath);\n\n if (matches.length) {\n extend.hasFoundMatches = true;\n\n // we found a match, so for each self selector..\n extend.selfSelectors.forEach(selfSelector => {\n const info = targetExtend.visibilityInfo();\n\n // process the extend as usual\n newSelector = extendVisitor.extendSelector(matches, selectorPath, selfSelector, extend.isVisible());\n\n // but now we create a new extend from it\n newExtend = new(tree.Extend)(targetExtend.selector, targetExtend.option, 0, targetExtend.fileInfo(), info);\n newExtend.selfSelectors = newSelector;\n\n // add the extend onto the list of extends for that selector\n newSelector[newSelector.length - 1].extendList = [newExtend];\n\n // record that we need to add it.\n extendsToAdd.push(newExtend);\n newExtend.ruleset = targetExtend.ruleset;\n\n // remember its parents for circular references\n newExtend.parent_ids = newExtend.parent_ids.concat(targetExtend.parent_ids, extend.parent_ids);\n\n // only process the selector once.. if we have :extend(.a,.b) then multiple\n // extends will look at the same selector path, so when extending\n // we know that any others will be duplicates in terms of what is added to the css\n if (targetExtend.firstExtendOnThisSelectorPath) {\n newExtend.firstExtendOnThisSelectorPath = true;\n targetExtend.ruleset.paths.push(newSelector);\n }\n });\n }\n }\n }\n\n if (extendsToAdd.length) {\n // try to detect circular references to stop a stack overflow.\n // may no longer be needed.\n this.extendChainCount++;\n if (iterationCount > 100) {\n let selectorOne = '{unable to calculate}';\n let selectorTwo = '{unable to calculate}';\n try {\n selectorOne = extendsToAdd[0].selfSelectors[0].toCSS();\n selectorTwo = extendsToAdd[0].selector.toCSS();\n }\n catch (e) {}\n throw { message: `extend circular reference detected. One of the circular extends is currently:${selectorOne}:extend(${selectorTwo})`};\n }\n\n // now process the new extends on the existing rules so that we can handle a extending b extending c extending\n // d extending e...\n return extendsToAdd.concat(extendVisitor.doExtendChaining(extendsToAdd, extendsListTarget, iterationCount + 1));\n } else {\n return extendsToAdd;\n }\n }\n\n visitDeclaration(ruleNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitSelector(selectorNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n if (rulesetNode.root) {\n return;\n }\n let matches;\n let pathIndex;\n let extendIndex;\n const allExtends = this.allExtendsStack[this.allExtendsStack.length - 1];\n const selectorsToAdd = [];\n const extendVisitor = this;\n let selectorPath;\n\n // look at each selector path in the ruleset, find any extend matches and then copy, find and replace\n\n for (extendIndex = 0; extendIndex < allExtends.length; extendIndex++) {\n for (pathIndex = 0; pathIndex < rulesetNode.paths.length; pathIndex++) {\n selectorPath = rulesetNode.paths[pathIndex];\n\n // extending extends happens initially, before the main pass\n if (rulesetNode.extendOnEveryPath) { continue; }\n const extendList = selectorPath[selectorPath.length - 1].extendList;\n if (extendList && extendList.length) { continue; }\n\n matches = this.findMatch(allExtends[extendIndex], selectorPath);\n\n if (matches.length) {\n allExtends[extendIndex].hasFoundMatches = true;\n\n allExtends[extendIndex].selfSelectors.forEach(selfSelector => {\n let extendedSelectors;\n extendedSelectors = extendVisitor.extendSelector(matches, selectorPath, selfSelector, allExtends[extendIndex].isVisible());\n selectorsToAdd.push(extendedSelectors);\n });\n }\n }\n }\n rulesetNode.paths = rulesetNode.paths.concat(selectorsToAdd);\n }\n\n findMatch(extend, haystackSelectorPath) {\n //\n // look through the haystack selector path to try and find the needle - extend.selector\n // returns an array of selector matches that can then be replaced\n //\n let haystackSelectorIndex;\n\n let hackstackSelector;\n let hackstackElementIndex;\n let haystackElement;\n let targetCombinator;\n let i;\n const extendVisitor = this;\n const needleElements = extend.selector.elements;\n const potentialMatches = [];\n let potentialMatch;\n const matches = [];\n\n // loop through the haystack elements\n for (haystackSelectorIndex = 0; haystackSelectorIndex < haystackSelectorPath.length; haystackSelectorIndex++) {\n hackstackSelector = haystackSelectorPath[haystackSelectorIndex];\n\n for (hackstackElementIndex = 0; hackstackElementIndex < hackstackSelector.elements.length; hackstackElementIndex++) {\n\n haystackElement = hackstackSelector.elements[hackstackElementIndex];\n\n // if we allow elements before our match we can add a potential match every time. otherwise only at the first element.\n if (extend.allowBefore || (haystackSelectorIndex === 0 && hackstackElementIndex === 0)) {\n potentialMatches.push({pathIndex: haystackSelectorIndex, index: hackstackElementIndex, matched: 0,\n initialCombinator: haystackElement.combinator});\n }\n\n for (i = 0; i < potentialMatches.length; i++) {\n potentialMatch = potentialMatches[i];\n\n // selectors add \" \" onto the first element. When we use & it joins the selectors together, but if we don't\n // then each selector in haystackSelectorPath has a space before it added in the toCSS phase. so we need to\n // work out what the resulting combinator will be\n targetCombinator = haystackElement.combinator.value;\n if (targetCombinator === '' && hackstackElementIndex === 0) {\n targetCombinator = ' ';\n }\n\n // if we don't match, null our match to indicate failure\n if (!extendVisitor.isElementValuesEqual(needleElements[potentialMatch.matched].value, haystackElement.value) ||\n (potentialMatch.matched > 0 && needleElements[potentialMatch.matched].combinator.value !== targetCombinator)) {\n potentialMatch = null;\n } else {\n potentialMatch.matched++;\n }\n\n // if we are still valid and have finished, test whether we have elements after and whether these are allowed\n if (potentialMatch) {\n potentialMatch.finished = potentialMatch.matched === needleElements.length;\n if (potentialMatch.finished &&\n (!extend.allowAfter &&\n (hackstackElementIndex + 1 < hackstackSelector.elements.length || haystackSelectorIndex + 1 < haystackSelectorPath.length))) {\n potentialMatch = null;\n }\n }\n // if null we remove, if not, we are still valid, so either push as a valid match or continue\n if (potentialMatch) {\n if (potentialMatch.finished) {\n potentialMatch.length = needleElements.length;\n potentialMatch.endPathIndex = haystackSelectorIndex;\n potentialMatch.endPathElementIndex = hackstackElementIndex + 1; // index after end of match\n potentialMatches.length = 0; // we don't allow matches to overlap, so start matching again\n matches.push(potentialMatch);\n }\n } else {\n potentialMatches.splice(i, 1);\n i--;\n }\n }\n }\n }\n return matches;\n }\n\n isElementValuesEqual(elementValue1, elementValue2) {\n if (typeof elementValue1 === 'string' || typeof elementValue2 === 'string') {\n return elementValue1 === elementValue2;\n }\n if (elementValue1 instanceof tree.Attribute) {\n if (elementValue1.op !== elementValue2.op || elementValue1.key !== elementValue2.key) {\n return false;\n }\n if (!elementValue1.value || !elementValue2.value) {\n if (elementValue1.value || elementValue2.value) {\n return false;\n }\n return true;\n }\n elementValue1 = elementValue1.value.value || elementValue1.value;\n elementValue2 = elementValue2.value.value || elementValue2.value;\n return elementValue1 === elementValue2;\n }\n elementValue1 = elementValue1.value;\n elementValue2 = elementValue2.value;\n if (elementValue1 instanceof tree.Selector) {\n if (!(elementValue2 instanceof tree.Selector) || elementValue1.elements.length !== elementValue2.elements.length) {\n return false;\n }\n for (let i = 0; i < elementValue1.elements.length; i++) {\n if (elementValue1.elements[i].combinator.value !== elementValue2.elements[i].combinator.value) {\n if (i !== 0 || (elementValue1.elements[i].combinator.value || ' ') !== (elementValue2.elements[i].combinator.value || ' ')) {\n return false;\n }\n }\n if (!this.isElementValuesEqual(elementValue1.elements[i].value, elementValue2.elements[i].value)) {\n return false;\n }\n }\n return true;\n }\n return false;\n }\n\n extendSelector(matches, selectorPath, replacementSelector, isVisible) {\n // for a set of matches, replace each match with the replacement selector\n\n let currentSelectorPathIndex = 0;\n\n let currentSelectorPathElementIndex = 0;\n let path = [];\n let matchIndex;\n let selector;\n let firstElement;\n let match;\n let newElements;\n\n for (matchIndex = 0; matchIndex < matches.length; matchIndex++) {\n match = matches[matchIndex];\n selector = selectorPath[match.pathIndex];\n firstElement = new tree.Element(\n match.initialCombinator,\n replacementSelector.elements[0].value,\n replacementSelector.elements[0].isVariable,\n replacementSelector.elements[0].getIndex(),\n replacementSelector.elements[0].fileInfo()\n );\n\n if (match.pathIndex > currentSelectorPathIndex && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n\n newElements = selector.elements\n .slice(currentSelectorPathElementIndex, match.index)\n .concat([firstElement])\n .concat(replacementSelector.elements.slice(1));\n\n if (currentSelectorPathIndex === match.pathIndex && matchIndex > 0) {\n path[path.length - 1].elements =\n path[path.length - 1].elements.concat(newElements);\n } else {\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, match.pathIndex));\n\n path.push(new tree.Selector(\n newElements\n ));\n }\n currentSelectorPathIndex = match.endPathIndex;\n currentSelectorPathElementIndex = match.endPathElementIndex;\n if (currentSelectorPathElementIndex >= selectorPath[currentSelectorPathIndex].elements.length) {\n currentSelectorPathElementIndex = 0;\n currentSelectorPathIndex++;\n }\n }\n\n if (currentSelectorPathIndex < selectorPath.length && currentSelectorPathElementIndex > 0) {\n path[path.length - 1].elements = path[path.length - 1]\n .elements.concat(selectorPath[currentSelectorPathIndex].elements.slice(currentSelectorPathElementIndex));\n currentSelectorPathIndex++;\n }\n\n path = path.concat(selectorPath.slice(currentSelectorPathIndex, selectorPath.length));\n path = path.map(currentValue => {\n // we can re-use elements here, because the visibility property matters only for selectors\n const derived = currentValue.createDerived(currentValue.elements);\n if (isVisible) {\n derived.ensureVisibility();\n } else {\n derived.ensureInvisibility();\n }\n return derived;\n });\n return path;\n }\n\n visitMedia(mediaNode, visitArgs) {\n let newAllExtends = mediaNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, mediaNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitMediaOut(mediaNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n let newAllExtends = atRuleNode.allExtends.concat(this.allExtendsStack[this.allExtendsStack.length - 1]);\n newAllExtends = newAllExtends.concat(this.doExtendChaining(newAllExtends, atRuleNode.allExtends));\n this.allExtendsStack.push(newAllExtends);\n }\n\n visitAtRuleOut(atRuleNode) {\n const lastIndex = this.allExtendsStack.length - 1;\n this.allExtendsStack.length = lastIndex;\n }\n}\n\nexport default ProcessExtendsVisitor;\n","import Visitor from './visitor';\n\nclass JoinSelectorVisitor {\n constructor() {\n this.contexts = [[]];\n this._visitor = new Visitor(this);\n }\n\n run(root) {\n return this._visitor.visit(root);\n }\n\n visitDeclaration(declNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitMixinDefinition(mixinDefinitionNode, visitArgs) {\n visitArgs.visitDeeper = false;\n }\n\n visitRuleset(rulesetNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n const paths = [];\n let selectors;\n\n this.contexts.push(paths);\n\n if (!rulesetNode.root) {\n selectors = rulesetNode.selectors;\n if (selectors) {\n selectors = selectors.filter(selector => selector.getIsOutput());\n rulesetNode.selectors = selectors.length ? selectors : (selectors = null);\n if (selectors) { rulesetNode.joinSelectors(paths, context, selectors); }\n }\n if (!selectors) { rulesetNode.rules = null; }\n rulesetNode.paths = paths;\n }\n }\n\n visitRulesetOut(rulesetNode) {\n this.contexts.length = this.contexts.length - 1;\n }\n\n visitMedia(mediaNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n mediaNode.rules[0].root = (context.length === 0 || context[0].multiMedia);\n }\n\n visitAtRule(atRuleNode, visitArgs) {\n const context = this.contexts[this.contexts.length - 1];\n if (atRuleNode.rules && atRuleNode.rules.length) {\n atRuleNode.rules[0].root = (atRuleNode.isRooted || context.length === 0 || null);\n }\n }\n}\n\nexport default JoinSelectorVisitor;\n","import tree from '../tree';\nimport Visitor from './visitor';\n\nclass CSSVisitorUtils {\n constructor(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n }\n\n containsSilentNonBlockedChild(bodyRules) {\n let rule;\n if (!bodyRules) {\n return false;\n }\n for (let r = 0; r < bodyRules.length; r++) {\n rule = bodyRules[r];\n if (rule.isSilent && rule.isSilent(this._context) && !rule.blocksVisibility()) {\n // the atrule contains something that was referenced (likely by extend)\n // therefore it needs to be shown in output too\n return true;\n }\n }\n return false;\n }\n\n keepOnlyVisibleChilds(owner) {\n if (owner && owner.rules) {\n owner.rules = owner.rules.filter(thing => thing.isVisible());\n }\n }\n\n isEmpty(owner) {\n return (owner && owner.rules) \n ? (owner.rules.length === 0) : true;\n }\n\n hasVisibleSelector(rulesetNode) {\n return (rulesetNode && rulesetNode.paths)\n ? (rulesetNode.paths.length > 0) : false;\n }\n\n resolveVisibility(node, originalRules) {\n if (!node.blocksVisibility()) {\n if (this.isEmpty(node) && !this.containsSilentNonBlockedChild(originalRules)) {\n return ;\n }\n\n return node;\n }\n\n const compiledRulesBody = node.rules[0];\n this.keepOnlyVisibleChilds(compiledRulesBody);\n\n if (this.isEmpty(compiledRulesBody)) {\n return ;\n }\n\n node.ensureVisibility();\n node.removeVisibilityBlock();\n\n return node;\n }\n\n isVisibleRuleset(rulesetNode) {\n if (rulesetNode.firstRoot) {\n return true;\n }\n\n if (this.isEmpty(rulesetNode)) {\n return false;\n }\n\n if (!rulesetNode.root && !this.hasVisibleSelector(rulesetNode)) {\n return false;\n }\n\n return true;\n }\n}\n\nconst ToCSSVisitor = function(context) {\n this._visitor = new Visitor(this);\n this._context = context;\n this.utils = new CSSVisitorUtils(context);\n};\n\nToCSSVisitor.prototype = {\n isReplacing: true,\n run: function (root) {\n return this._visitor.visit(root);\n },\n\n visitDeclaration: function (declNode, visitArgs) {\n if (declNode.blocksVisibility() || declNode.variable) {\n return;\n }\n return declNode;\n },\n\n visitMixinDefinition: function (mixinNode, visitArgs) {\n // mixin definitions do not get eval'd - this means they keep state\n // so we have to clear that state here so it isn't used if toCSS is called twice\n mixinNode.frames = [];\n },\n\n visitExtend: function (extendNode, visitArgs) {\n },\n\n visitComment: function (commentNode, visitArgs) {\n if (commentNode.blocksVisibility() || commentNode.isSilent(this._context)) {\n return;\n }\n return commentNode;\n },\n\n visitMedia: function(mediaNode, visitArgs) {\n const originalRules = mediaNode.rules[0].rules;\n mediaNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n return this.utils.resolveVisibility(mediaNode, originalRules);\n },\n\n visitImport: function (importNode, visitArgs) {\n if (importNode.blocksVisibility()) {\n return ;\n }\n return importNode;\n },\n\n visitAtRule: function(atRuleNode, visitArgs) {\n if (atRuleNode.rules && atRuleNode.rules.length) {\n return this.visitAtRuleWithBody(atRuleNode, visitArgs);\n } else {\n return this.visitAtRuleWithoutBody(atRuleNode, visitArgs);\n }\n },\n\n visitAnonymous: function(anonymousNode, visitArgs) {\n if (!anonymousNode.blocksVisibility()) {\n anonymousNode.accept(this._visitor);\n return anonymousNode;\n }\n },\n\n visitAtRuleWithBody: function(atRuleNode, visitArgs) {\n // if there is only one nested ruleset and that one has no path, then it is\n // just fake ruleset\n function hasFakeRuleset(atRuleNode) {\n const bodyRules = atRuleNode.rules;\n return bodyRules.length === 1 && (!bodyRules[0].paths || bodyRules[0].paths.length === 0);\n }\n function getBodyRules(atRuleNode) {\n const nodeRules = atRuleNode.rules;\n if (hasFakeRuleset(atRuleNode)) {\n return nodeRules[0].rules;\n }\n\n return nodeRules;\n }\n // it is still true that it is only one ruleset in array\n // this is last such moment\n // process childs\n const originalRules = getBodyRules(atRuleNode);\n atRuleNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n\n if (!this.utils.isEmpty(atRuleNode)) {\n this._mergeRules(atRuleNode.rules[0].rules);\n }\n\n return this.utils.resolveVisibility(atRuleNode, originalRules);\n },\n\n visitAtRuleWithoutBody: function(atRuleNode, visitArgs) {\n if (atRuleNode.blocksVisibility()) {\n return;\n }\n\n if (atRuleNode.name === '@charset') {\n // Only output the debug info together with subsequent @charset definitions\n // a comment (or @media statement) before the actual @charset atrule would\n // be considered illegal css as it has to be on the first line\n if (this.charset) {\n if (atRuleNode.debugInfo) {\n const comment = new tree.Comment(`/* ${atRuleNode.toCSS(this._context).replace(/\\n/g, '')} */\\n`);\n comment.debugInfo = atRuleNode.debugInfo;\n return this._visitor.visit(comment);\n }\n return;\n }\n this.charset = true;\n }\n\n return atRuleNode;\n },\n\n checkValidNodes: function(rules, isRoot) {\n if (!rules) {\n return;\n }\n\n for (let i = 0; i < rules.length; i++) {\n const ruleNode = rules[i];\n if (isRoot && ruleNode instanceof tree.Declaration && !ruleNode.variable) {\n throw { message: 'Properties must be inside selector blocks. They cannot be in the root',\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode instanceof tree.Call) {\n throw { message: `Function '${ruleNode.name}' is undefined`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n if (ruleNode.type && !ruleNode.allowRoot) {\n throw { message: `${ruleNode.type} node returned by a function is not valid here`,\n index: ruleNode.getIndex(), filename: ruleNode.fileInfo() && ruleNode.fileInfo().filename};\n }\n }\n },\n\n visitRuleset: function (rulesetNode, visitArgs) {\n // at this point rulesets are nested into each other\n let rule;\n\n const rulesets = [];\n\n this.checkValidNodes(rulesetNode.rules, rulesetNode.firstRoot);\n\n if (!rulesetNode.root) {\n // remove invisible paths\n this._compileRulesetPaths(rulesetNode);\n\n // remove rulesets from this ruleset body and compile them separately\n const nodeRules = rulesetNode.rules;\n\n let nodeRuleCnt = nodeRules ? nodeRules.length : 0;\n for (let i = 0; i < nodeRuleCnt; ) {\n rule = nodeRules[i];\n if (rule && rule.rules) {\n // visit because we are moving them out from being a child\n rulesets.push(this._visitor.visit(rule));\n nodeRules.splice(i, 1);\n nodeRuleCnt--;\n continue;\n }\n i++;\n }\n // accept the visitor to remove rules and refactor itself\n // then we can decide nogw whether we want it or not\n // compile body\n if (nodeRuleCnt > 0) {\n rulesetNode.accept(this._visitor);\n } else {\n rulesetNode.rules = null;\n }\n visitArgs.visitDeeper = false;\n } else { // if (! rulesetNode.root) {\n rulesetNode.accept(this._visitor);\n visitArgs.visitDeeper = false;\n }\n\n if (rulesetNode.rules) {\n this._mergeRules(rulesetNode.rules);\n this._removeDuplicateRules(rulesetNode.rules);\n }\n\n // now decide whether we keep the ruleset\n if (this.utils.isVisibleRuleset(rulesetNode)) {\n rulesetNode.ensureVisibility();\n rulesets.splice(0, 0, rulesetNode);\n }\n\n if (rulesets.length === 1) {\n return rulesets[0];\n }\n return rulesets;\n },\n\n _compileRulesetPaths: function(rulesetNode) {\n if (rulesetNode.paths) {\n rulesetNode.paths = rulesetNode.paths\n .filter(p => {\n let i;\n if (p[0].elements[0].combinator.value === ' ') {\n p[0].elements[0].combinator = new(tree.Combinator)('');\n }\n for (i = 0; i < p.length; i++) {\n if (p[i].isVisible() && p[i].getIsOutput()) {\n return true;\n }\n }\n return false;\n });\n }\n },\n\n _removeDuplicateRules: function(rules) {\n if (!rules) { return; }\n\n // remove duplicates\n const ruleCache = {};\n\n let ruleList;\n let rule;\n let i;\n\n for (i = rules.length - 1; i >= 0 ; i--) {\n rule = rules[i];\n if (rule instanceof tree.Declaration) {\n if (!ruleCache[rule.name]) {\n ruleCache[rule.name] = rule;\n } else {\n ruleList = ruleCache[rule.name];\n if (ruleList instanceof tree.Declaration) {\n ruleList = ruleCache[rule.name] = [ruleCache[rule.name].toCSS(this._context)];\n }\n const ruleCSS = rule.toCSS(this._context);\n if (ruleList.indexOf(ruleCSS) !== -1) {\n rules.splice(i, 1);\n } else {\n ruleList.push(ruleCSS);\n }\n }\n }\n }\n },\n\n _mergeRules: function(rules) {\n if (!rules) {\n return; \n }\n\n const groups = {};\n const groupsArr = [];\n\n for (let i = 0; i < rules.length; i++) {\n const rule = rules[i];\n if (rule.merge) {\n const key = rule.name;\n groups[key] ? rules.splice(i--, 1) : \n groupsArr.push(groups[key] = []);\n groups[key].push(rule);\n }\n }\n\n groupsArr.forEach(group => {\n if (group.length > 0) {\n const result = group[0];\n let space = [];\n const comma = [new tree.Expression(space)];\n group.forEach(rule => {\n if ((rule.merge === '+') && (space.length > 0)) {\n comma.push(new tree.Expression(space = []));\n }\n space.push(rule.value);\n result.important = result.important || rule.important;\n });\n result.value = new tree.Value(comma);\n }\n });\n }\n};\n\nexport default ToCSSVisitor;\n","import Visitor from './visitor';\nimport ImportVisitor from './import-visitor';\nimport MarkVisibleSelectorsVisitor from './set-tree-visibility-visitor';\nimport ExtendVisitor from './extend-visitor';\nimport JoinSelectorVisitor from './join-selector-visitor';\nimport ToCSSVisitor from './to-css-visitor';\n\nexport default {\n Visitor,\n ImportVisitor,\n MarkVisibleSelectorsVisitor,\n ExtendVisitor,\n JoinSelectorVisitor,\n ToCSSVisitor\n};\n","import chunker from './chunker';\n\nexport default () => {\n let // Less input string\n input;\n\n let // current chunk\n j;\n\n const // holds state for backtracking\n saveStack = [];\n\n let // furthest index the parser has gone to\n furthest;\n\n let // if this is furthest we got to, this is the probably cause\n furthestPossibleErrorMessage;\n\n let // chunkified input\n chunks;\n\n let // current chunk\n current;\n\n let // index of current chunk, in `input`\n currentPos;\n\n const parserInput = {};\n const CHARCODE_SPACE = 32;\n const CHARCODE_TAB = 9;\n const CHARCODE_LF = 10;\n const CHARCODE_CR = 13;\n const CHARCODE_PLUS = 43;\n const CHARCODE_COMMA = 44;\n const CHARCODE_FORWARD_SLASH = 47;\n const CHARCODE_9 = 57;\n\n function skipWhitespace(length) {\n const oldi = parserInput.i;\n const oldj = j;\n const curr = parserInput.i - currentPos;\n const endIndex = parserInput.i + current.length - curr;\n const mem = (parserInput.i += length);\n const inp = input;\n let c;\n let nextChar;\n let comment;\n\n for (; parserInput.i < endIndex; parserInput.i++) {\n c = inp.charCodeAt(parserInput.i);\n\n if (parserInput.autoCommentAbsorb && c === CHARCODE_FORWARD_SLASH) {\n nextChar = inp.charAt(parserInput.i + 1);\n if (nextChar === '/') {\n comment = {index: parserInput.i, isLineComment: true};\n let nextNewLine = inp.indexOf('\\n', parserInput.i + 2);\n if (nextNewLine < 0) {\n nextNewLine = endIndex;\n }\n parserInput.i = nextNewLine;\n comment.text = inp.substr(comment.index, parserInput.i - comment.index);\n parserInput.commentStore.push(comment);\n continue;\n } else if (nextChar === '*') {\n const nextStarSlash = inp.indexOf('*/', parserInput.i + 2);\n if (nextStarSlash >= 0) {\n comment = {\n index: parserInput.i,\n text: inp.substr(parserInput.i, nextStarSlash + 2 - parserInput.i),\n isLineComment: false\n };\n parserInput.i += comment.text.length - 1;\n parserInput.commentStore.push(comment);\n continue;\n }\n }\n break;\n }\n\n if ((c !== CHARCODE_SPACE) && (c !== CHARCODE_LF) && (c !== CHARCODE_TAB) && (c !== CHARCODE_CR)) {\n break;\n }\n }\n\n current = current.slice(length + parserInput.i - mem + curr);\n currentPos = parserInput.i;\n\n if (!current.length) {\n if (j < chunks.length - 1) {\n current = chunks[++j];\n skipWhitespace(0); // skip space at the beginning of a chunk\n return true; // things changed\n }\n parserInput.finished = true;\n }\n\n return oldi !== parserInput.i || oldj !== j;\n }\n\n parserInput.save = () => {\n currentPos = parserInput.i;\n saveStack.push( { current, i: parserInput.i, j });\n };\n parserInput.restore = possibleErrorMessage => {\n\n if (parserInput.i > furthest || (parserInput.i === furthest && possibleErrorMessage && !furthestPossibleErrorMessage)) {\n furthest = parserInput.i;\n furthestPossibleErrorMessage = possibleErrorMessage;\n }\n const state = saveStack.pop();\n current = state.current;\n currentPos = parserInput.i = state.i;\n j = state.j;\n };\n parserInput.forget = () => {\n saveStack.pop();\n };\n parserInput.isWhitespace = offset => {\n const pos = parserInput.i + (offset || 0);\n const code = input.charCodeAt(pos);\n return (code === CHARCODE_SPACE || code === CHARCODE_CR || code === CHARCODE_TAB || code === CHARCODE_LF);\n };\n\n // Specialization of $(tok)\n parserInput.$re = tok => {\n if (parserInput.i > currentPos) {\n current = current.slice(parserInput.i - currentPos);\n currentPos = parserInput.i;\n }\n\n const m = tok.exec(current);\n if (!m) {\n return null;\n }\n\n skipWhitespace(m[0].length);\n if (typeof m === 'string') {\n return m;\n }\n\n return m.length === 1 ? m[0] : m;\n };\n\n parserInput.$char = tok => {\n if (input.charAt(parserInput.i) !== tok) {\n return null;\n }\n skipWhitespace(1);\n return tok;\n };\n\n parserInput.$str = tok => {\n const tokLength = tok.length;\n\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tokLength; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return null;\n }\n }\n\n skipWhitespace(tokLength);\n return tok;\n };\n\n parserInput.$quoted = loc => {\n const pos = loc || parserInput.i;\n const startChar = input.charAt(pos);\n\n if (startChar !== '\\'' && startChar !== '\"') {\n return;\n }\n const length = input.length;\n const currentPosition = pos;\n\n for (let i = 1; i + currentPosition < length; i++) {\n const nextChar = input.charAt(i + currentPosition);\n switch (nextChar) {\n case '\\\\':\n i++;\n continue;\n case '\\r':\n case '\\n':\n break;\n case startChar:\n const str = input.substr(currentPosition, i + 1);\n if (!loc && loc !== 0) {\n skipWhitespace(i + 1);\n return str\n }\n return [startChar, str];\n default:\n }\n }\n return null;\n };\n\n /**\n * Permissive parsing. Ignores everything except matching {} [] () and quotes\n * until matching token (outside of blocks)\n */\n parserInput.$parseUntil = tok => {\n let quote = '';\n let returnVal = null;\n let inComment = false;\n let blockDepth = 0;\n const blockStack = [];\n const parseGroups = [];\n const length = input.length;\n const startPos = parserInput.i;\n let lastPos = parserInput.i;\n let i = parserInput.i;\n let loop = true;\n let testChar;\n\n if (typeof tok === 'string') {\n testChar = char => char === tok\n } else {\n testChar = char => tok.test(char)\n }\n\n do {\n let prevChar;\n let nextChar = input.charAt(i);\n if (blockDepth === 0 && testChar(nextChar)) {\n returnVal = input.substr(lastPos, i - lastPos);\n if (returnVal) {\n parseGroups.push(returnVal);\n }\n else {\n parseGroups.push(' ');\n }\n returnVal = parseGroups;\n skipWhitespace(i - startPos);\n loop = false\n } else {\n if (inComment) {\n if (nextChar === '*' && \n input.charAt(i + 1) === '/') {\n i++;\n blockDepth--;\n inComment = false;\n }\n i++;\n continue;\n }\n switch (nextChar) {\n case '\\\\':\n i++;\n nextChar = input.charAt(i);\n parseGroups.push(input.substr(lastPos, i - lastPos + 1));\n lastPos = i + 1;\n break;\n case '/':\n if (input.charAt(i + 1) === '*') {\n i++;\n inComment = true;\n blockDepth++;\n }\n break;\n case '\\'':\n case '\"':\n quote = parserInput.$quoted(i);\n if (quote) {\n parseGroups.push(input.substr(lastPos, i - lastPos), quote);\n i += quote[1].length - 1;\n lastPos = i + 1;\n }\n else {\n skipWhitespace(i - startPos);\n returnVal = nextChar;\n loop = false;\n }\n break;\n case '{':\n blockStack.push('}');\n blockDepth++;\n break;\n case '(':\n blockStack.push(')');\n blockDepth++;\n break;\n case '[':\n blockStack.push(']');\n blockDepth++;\n break;\n case '}':\n case ')':\n case ']':\n const expected = blockStack.pop();\n if (nextChar === expected) {\n blockDepth--;\n } else {\n // move the parser to the error and return expected\n skipWhitespace(i - startPos);\n returnVal = expected;\n loop = false;\n }\n }\n i++;\n if (i > length) {\n loop = false;\n }\n }\n prevChar = nextChar;\n } while (loop);\n\n return returnVal ? returnVal : null;\n }\n\n parserInput.autoCommentAbsorb = true;\n parserInput.commentStore = [];\n parserInput.finished = false;\n\n // Same as $(), but don't change the state of the parser,\n // just return the match.\n parserInput.peek = tok => {\n if (typeof tok === 'string') {\n // https://jsperf.com/string-startswith/21\n for (let i = 0; i < tok.length; i++) {\n if (input.charAt(parserInput.i + i) !== tok.charAt(i)) {\n return false;\n }\n }\n return true;\n } else {\n return tok.test(current);\n }\n };\n\n // Specialization of peek()\n // TODO remove or change some currentChar calls to peekChar\n parserInput.peekChar = tok => input.charAt(parserInput.i) === tok;\n\n parserInput.currentChar = () => input.charAt(parserInput.i);\n\n parserInput.prevChar = () => input.charAt(parserInput.i - 1);\n\n parserInput.getInput = () => input;\n\n parserInput.peekNotNumeric = () => {\n const c = input.charCodeAt(parserInput.i);\n // Is the first char of the dimension 0-9, '.', '+' or '-'\n return (c > CHARCODE_9 || c < CHARCODE_PLUS) || c === CHARCODE_FORWARD_SLASH || c === CHARCODE_COMMA;\n };\n\n parserInput.start = (str, chunkInput, failFunction) => {\n input = str;\n parserInput.i = j = currentPos = furthest = 0;\n\n // chunking apparently makes things quicker (but my tests indicate\n // it might actually make things slower in node at least)\n // and it is a non-perfect parse - it can't recognise\n // unquoted urls, meaning it can't distinguish comments\n // meaning comments with quotes or {}() in them get 'counted'\n // and then lead to parse errors.\n // In addition if the chunking chunks in the wrong place we might\n // not be able to parse a parser statement in one go\n // this is officially deprecated but can be switched on via an option\n // in the case it causes too much performance issues.\n if (chunkInput) {\n chunks = chunker(str, failFunction);\n } else {\n chunks = [str];\n }\n\n current = chunks[0];\n\n skipWhitespace(0);\n };\n\n parserInput.end = () => {\n let message;\n const isFinished = parserInput.i >= input.length;\n\n if (parserInput.i < furthest) {\n message = furthestPossibleErrorMessage;\n parserInput.i = furthest;\n }\n return {\n isFinished,\n furthest: parserInput.i,\n furthestPossibleErrorMessage: message,\n furthestReachedEnd: parserInput.i >= input.length - 1,\n furthestChar: input[parserInput.i]\n };\n };\n\n return parserInput;\n};\n","// Split the input into chunks.\nexport default (input, fail) => {\n const len = input.length;\n let level = 0;\n let parenLevel = 0;\n let lastOpening;\n let lastOpeningParen;\n let lastMultiComment;\n let lastMultiCommentEndBrace;\n const chunks = [];\n let emitFrom = 0;\n let chunkerCurrentIndex;\n let currentChunkStartIndex;\n let cc;\n let cc2;\n let matched;\n\n function emitChunk(force) {\n const len = chunkerCurrentIndex - emitFrom;\n if (((len < 512) && !force) || !len) {\n return;\n }\n chunks.push(input.slice(emitFrom, chunkerCurrentIndex + 1));\n emitFrom = chunkerCurrentIndex + 1;\n }\n\n for (chunkerCurrentIndex = 0; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc = input.charCodeAt(chunkerCurrentIndex);\n if (((cc >= 97) && (cc <= 122)) || (cc < 34)) {\n // a-z or whitespace\n continue;\n }\n\n switch (cc) {\n case 40: // (\n parenLevel++;\n lastOpeningParen = chunkerCurrentIndex;\n continue;\n case 41: // )\n if (--parenLevel < 0) {\n return fail('missing opening `(`', chunkerCurrentIndex);\n }\n continue;\n case 59: // ;\n if (!parenLevel) { emitChunk(); }\n continue;\n case 123: // {\n level++;\n lastOpening = chunkerCurrentIndex;\n continue;\n case 125: // }\n if (--level < 0) {\n return fail('missing opening `{`', chunkerCurrentIndex);\n }\n if (!level && !parenLevel) { emitChunk(); }\n continue;\n case 92: // \\\n if (chunkerCurrentIndex < len - 1) { chunkerCurrentIndex++; continue; }\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n case 34:\n case 39:\n case 96: // \", ' and `\n matched = 0;\n currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 1; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 > 96) { continue; }\n if (cc2 == cc) { matched = 1; break; }\n if (cc2 == 92) { // \\\n if (chunkerCurrentIndex == len - 1) {\n return fail('unescaped `\\\\`', chunkerCurrentIndex);\n }\n chunkerCurrentIndex++;\n }\n }\n if (matched) { continue; }\n return fail(`unmatched \\`${String.fromCharCode(cc)}\\``, currentChunkStartIndex);\n case 47: // /, check for comment\n if (parenLevel || (chunkerCurrentIndex == len - 1)) { continue; }\n cc2 = input.charCodeAt(chunkerCurrentIndex + 1);\n if (cc2 == 47) {\n // //, find lnfeed\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if ((cc2 <= 13) && ((cc2 == 10) || (cc2 == 13))) { break; }\n }\n } else if (cc2 == 42) {\n // /*, find */\n lastMultiComment = currentChunkStartIndex = chunkerCurrentIndex;\n for (chunkerCurrentIndex = chunkerCurrentIndex + 2; chunkerCurrentIndex < len - 1; chunkerCurrentIndex++) {\n cc2 = input.charCodeAt(chunkerCurrentIndex);\n if (cc2 == 125) { lastMultiCommentEndBrace = chunkerCurrentIndex; }\n if (cc2 != 42) { continue; }\n if (input.charCodeAt(chunkerCurrentIndex + 1) == 47) { break; }\n }\n if (chunkerCurrentIndex == len - 1) {\n return fail('missing closing `*/`', currentChunkStartIndex);\n }\n chunkerCurrentIndex++;\n }\n continue;\n case 42: // *, check for unmatched */\n if ((chunkerCurrentIndex < len - 1) && (input.charCodeAt(chunkerCurrentIndex + 1) == 47)) {\n return fail('unmatched `/*`', chunkerCurrentIndex);\n }\n continue;\n }\n }\n\n if (level !== 0) {\n if ((lastMultiComment > lastOpening) && (lastMultiCommentEndBrace > lastMultiComment)) {\n return fail('missing closing `}` or `*/`', lastOpening);\n } else {\n return fail('missing closing `}`', lastOpening);\n }\n } else if (parenLevel !== 0) {\n return fail('missing closing `)`', lastOpeningParen);\n }\n\n emitChunk(true);\n return chunks;\n};\n","import LessError from '../less-error';\nimport tree from '../tree';\nimport visitors from '../visitors';\nimport getParserInput from './parser-input';\nimport * as utils from '../utils';\nimport functionRegistry from '../functions/function-registry';\n\n//\n// less.js - parser\n//\n// A relatively straight-forward predictive parser.\n// There is no tokenization/lexing stage, the input is parsed\n// in one sweep.\n//\n// To make the parser fast enough to run in the browser, several\n// optimization had to be made:\n//\n// - Matching and slicing on a huge input is often cause of slowdowns.\n// The solution is to chunkify the input into smaller strings.\n// The chunks are stored in the `chunks` var,\n// `j` holds the current chunk index, and `currentPos` holds\n// the index of the current chunk in relation to `input`.\n// This gives us an almost 4x speed-up.\n//\n// - In many cases, we don't need to match individual tokens;\n// for example, if a value doesn't hold any variables, operations\n// or dynamic references, the parser can effectively 'skip' it,\n// treating it as a literal.\n// An example would be '1px solid #000' - which evaluates to itself,\n// we don't need to know what the individual components are.\n// The drawback, of course is that you don't get the benefits of\n// syntax-checking on the CSS. This gives us a 50% speed-up in the parser,\n// and a smaller speed-up in the code-gen.\n//\n//\n// Token matching is done with the `$` function, which either takes\n// a terminal string or regexp, or a non-terminal function to call.\n// It also takes care of moving all the indices forwards.\n//\n\nconst Parser = function Parser(context, imports, fileInfo) {\n let parsers;\n const parserInput = getParserInput();\n\n function error(msg, type) {\n throw new LessError(\n {\n index: parserInput.i,\n filename: fileInfo.filename,\n type: type || 'Syntax',\n message: msg\n },\n imports\n );\n }\n\n function expect(arg, msg) {\n // some older browsers return typeof 'function' for RegExp\n const result = (arg instanceof Function) ? arg.call(parsers) : parserInput.$re(arg);\n if (result) {\n return result;\n }\n \n error(msg || (typeof arg === 'string'\n ? `expected '${arg}' got '${parserInput.currentChar()}'`\n : 'unexpected token'));\n }\n\n // Specialization of expect()\n function expectChar(arg, msg) {\n if (parserInput.$char(arg)) {\n return arg;\n }\n error(msg || `expected '${arg}' got '${parserInput.currentChar()}'`);\n }\n\n function getDebugInfo(index) {\n const filename = fileInfo.filename;\n\n return {\n lineNumber: utils.getLocation(index, parserInput.getInput()).line + 1,\n fileName: filename\n };\n }\n\n /**\n * Used after initial parsing to create nodes on the fly\n * \n * @param {String} str - string to parse \n * @param {Array} parseList - array of parsers to run input through e.g. [\"value\", \"important\"]\n * @param {Number} currentIndex - start number to begin indexing\n * @param {Object} fileInfo - fileInfo to attach to created nodes\n */\n function parseNode(str, parseList, currentIndex, fileInfo, callback) {\n let result;\n const returnNodes = [];\n const parser = parserInput;\n\n try {\n parser.start(str, false, function fail(msg, index) {\n callback({\n message: msg,\n index: index + currentIndex\n });\n });\n for (let x = 0, p, i; (p = parseList[x]); x++) {\n i = parser.i;\n result = parsers[p]();\n if (result) {\n result._index = i + currentIndex;\n result._fileInfo = fileInfo;\n returnNodes.push(result);\n }\n else {\n returnNodes.push(null);\n }\n }\n\n const endInfo = parser.end();\n if (endInfo.isFinished) {\n callback(null, returnNodes);\n }\n else {\n callback(true, null);\n }\n } catch (e) {\n throw new LessError({\n index: e.index + currentIndex,\n message: e.message\n }, imports, fileInfo.filename);\n }\n }\n\n //\n // The Parser\n //\n return {\n parserInput,\n imports,\n fileInfo,\n parseNode,\n //\n // Parse an input string into an abstract syntax tree,\n // @param str A string containing 'less' markup\n // @param callback call `callback` when done.\n // @param [additionalData] An optional map which can contains vars - a map (key, value) of variables to apply\n //\n parse: function (str, callback, additionalData) {\n let root;\n let error = null;\n let globalVars;\n let modifyVars;\n let ignored;\n let preText = '';\n\n globalVars = (additionalData && additionalData.globalVars) ? `${Parser.serializeVars(additionalData.globalVars)}\\n` : '';\n modifyVars = (additionalData && additionalData.modifyVars) ? `\\n${Parser.serializeVars(additionalData.modifyVars)}` : '';\n\n if (context.pluginManager) {\n const preProcessors = context.pluginManager.getPreProcessors();\n for (let i = 0; i < preProcessors.length; i++) {\n str = preProcessors[i].process(str, { context, imports, fileInfo });\n }\n }\n\n if (globalVars || (additionalData && additionalData.banner)) {\n preText = ((additionalData && additionalData.banner) ? additionalData.banner : '') + globalVars;\n ignored = imports.contentsIgnoredChars;\n ignored[fileInfo.filename] = ignored[fileInfo.filename] || 0;\n ignored[fileInfo.filename] += preText.length;\n }\n\n str = str.replace(/\\r\\n?/g, '\\n');\n // Remove potential UTF Byte Order Mark\n str = preText + str.replace(/^\\uFEFF/, '') + modifyVars;\n imports.contents[fileInfo.filename] = str;\n\n // Start with the primary rule.\n // The whole syntax tree is held under a Ruleset node,\n // with the `root` property set to true, so no `{}` are\n // output. The callback is called when the input is parsed.\n try {\n parserInput.start(str, context.chunkInput, function fail(msg, index) {\n throw new LessError({\n index,\n type: 'Parse',\n message: msg,\n filename: fileInfo.filename\n }, imports);\n });\n\n tree.Node.prototype.parse = this;\n root = new tree.Ruleset(null, this.parsers.primary());\n tree.Node.prototype.rootNode = root;\n root.root = true;\n root.firstRoot = true;\n root.functionRegistry = functionRegistry.inherit();\n \n } catch (e) {\n return callback(new LessError(e, imports, fileInfo.filename));\n }\n\n // If `i` is smaller than the `input.length - 1`,\n // it means the parser wasn't able to parse the whole\n // string, so we've got a parsing error.\n //\n // We try to extract a \\n delimited string,\n // showing the line where the parse error occurred.\n // We split it up into two parts (the part which parsed,\n // and the part which didn't), so we can color them differently.\n const endInfo = parserInput.end();\n if (!endInfo.isFinished) {\n\n let message = endInfo.furthestPossibleErrorMessage;\n\n if (!message) {\n message = 'Unrecognised input';\n if (endInfo.furthestChar === '}') {\n message += '. Possibly missing opening \\'{\\'';\n } else if (endInfo.furthestChar === ')') {\n message += '. Possibly missing opening \\'(\\'';\n } else if (endInfo.furthestReachedEnd) {\n message += '. Possibly missing something';\n }\n }\n\n error = new LessError({\n type: 'Parse',\n message,\n index: endInfo.furthest,\n filename: fileInfo.filename\n }, imports);\n }\n\n const finish = e => {\n e = error || e || imports.error;\n\n if (e) {\n if (!(e instanceof LessError)) {\n e = new LessError(e, imports, fileInfo.filename);\n }\n\n return callback(e);\n }\n else {\n return callback(null, root);\n }\n };\n\n if (context.processImports !== false) {\n new visitors.ImportVisitor(imports, finish)\n .run(root);\n } else {\n return finish();\n }\n },\n\n //\n // Here in, the parsing rules/functions\n //\n // The basic structure of the syntax tree generated is as follows:\n //\n // Ruleset -> Declaration -> Value -> Expression -> Entity\n //\n // Here's some Less code:\n //\n // .class {\n // color: #fff;\n // border: 1px solid #000;\n // width: @w + 4px;\n // > .child {...}\n // }\n //\n // And here's what the parse tree might look like:\n //\n // Ruleset (Selector '.class', [\n // Declaration (\"color\", Value ([Expression [Color #fff]]))\n // Declaration (\"border\", Value ([Expression [Dimension 1px][Keyword \"solid\"][Color #000]]))\n // Declaration (\"width\", Value ([Expression [Operation \" + \" [Variable \"@w\"][Dimension 4px]]]))\n // Ruleset (Selector [Element '>', '.child'], [...])\n // ])\n //\n // In general, most rules will try to parse a token with the `$re()` function, and if the return\n // value is truly, will return a new node, of the relevant type. Sometimes, we need to check\n // first, before parsing, that's when we use `peek()`.\n //\n parsers: parsers = {\n //\n // The `primary` rule is the *entry* and *exit* point of the parser.\n // The rules here can appear at any level of the parse tree.\n //\n // The recursive nature of the grammar is an interplay between the `block`\n // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,\n // as represented by this simplified grammar:\n //\n // primary → (ruleset | declaration)+\n // ruleset → selector+ block\n // block → '{' primary '}'\n //\n // Only at one point is the primary rule not called from the\n // block rule: at the root level.\n //\n primary: function () {\n const mixin = this.mixin;\n let root = [];\n let node;\n\n while (true) {\n while (true) {\n node = this.comment();\n if (!node) { break; }\n root.push(node);\n }\n // always process comments before deciding if finished\n if (parserInput.finished) {\n break;\n }\n if (parserInput.peek('}')) {\n break;\n }\n\n node = this.extendRule();\n if (node) {\n root = root.concat(node);\n continue;\n }\n\n node = mixin.definition() || this.declaration() || this.ruleset() ||\n mixin.call(false, false) || this.variableCall() || this.entities.call() || this.atrule();\n if (node) {\n root.push(node);\n } else {\n let foundSemiColon = false;\n while (parserInput.$char(';')) {\n foundSemiColon = true;\n }\n if (!foundSemiColon) {\n break;\n }\n }\n }\n\n return root;\n },\n\n // comments are collected by the main parsing mechanism and then assigned to nodes\n // where the current structure allows it\n comment: function () {\n if (parserInput.commentStore.length) {\n const comment = parserInput.commentStore.shift();\n return new(tree.Comment)(comment.text, comment.isLineComment, comment.index, fileInfo);\n }\n },\n\n //\n // Entities are tokens which can be found inside an Expression\n //\n entities: {\n mixinLookup: function() {\n return parsers.mixin.call(true, true);\n },\n //\n // A string, which supports escaping \" and '\n //\n // \"milky way\" 'he\\'s the one!'\n //\n quoted: function (forceEscaped) {\n let str;\n const index = parserInput.i;\n let isEscaped = false;\n\n parserInput.save();\n if (parserInput.$char('~')) {\n isEscaped = true;\n } else if (forceEscaped) {\n parserInput.restore();\n return;\n }\n\n str = parserInput.$quoted();\n if (!str) {\n parserInput.restore();\n return;\n }\n parserInput.forget();\n\n return new(tree.Quoted)(str.charAt(0), str.substr(1, str.length - 2), isEscaped, index, fileInfo);\n },\n\n //\n // A catch-all word, such as:\n //\n // black border-collapse\n //\n keyword: function () {\n const k = parserInput.$char('%') || parserInput.$re(/^\\[?(?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+\\]?/);\n if (k) {\n return tree.Color.fromKeyword(k) || new(tree.Keyword)(k);\n }\n },\n\n //\n // A function call\n //\n // rgb(255, 0, 255)\n //\n // The arguments are parsed with the `entities.arguments` parser.\n //\n call: function () {\n let name;\n let args;\n let func;\n const index = parserInput.i;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (parserInput.peek(/^url\\(/i)) {\n return;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^([\\w-]+|%|progid:[\\w\\.]+)\\(/);\n if (!name) {\n parserInput.forget(); \n return;\n }\n\n name = name[1];\n func = this.customFuncCall(name);\n if (func) {\n args = func.parse();\n if (args && func.stop) {\n parserInput.forget();\n return args;\n }\n }\n\n args = this.arguments(args);\n\n if (!parserInput.$char(')')) {\n parserInput.restore('Could not parse call arguments or missing \\')\\'');\n return;\n }\n\n parserInput.forget();\n\n return new(tree.Call)(name, args, index, fileInfo);\n },\n \n //\n // Parsing rules for functions with non-standard args, e.g.:\n //\n // boolean(not(2 > 1))\n //\n // This is a quick prototype, to be modified/improved when\n // more custom-parsed funcs come (e.g. `selector(...)`)\n //\n\n customFuncCall: function (name) {\n /* Ideally the table is to be moved out of here for faster perf.,\n but it's quite tricky since it relies on all these `parsers`\n and `expect` available only here */\n return {\n alpha: f(parsers.ieAlpha, true),\n boolean: f(condition),\n 'if': f(condition)\n }[name.toLowerCase()];\n\n function f(parse, stop) {\n return {\n parse, // parsing function\n stop // when true - stop after parse() and return its result, \n // otherwise continue for plain args\n };\n }\n \n function condition() {\n return [expect(parsers.condition, 'expected condition')];\n }\n },\n\n arguments: function (prevArgs) {\n let argsComma = prevArgs || [];\n const argsSemiColon = [];\n let isSemiColonSeparated;\n let value;\n\n parserInput.save();\n\n while (true) {\n if (prevArgs) {\n prevArgs = false;\n } else {\n value = parsers.detachedRuleset() || this.assignment() || parsers.expression();\n if (!value) {\n break;\n }\n\n if (value.value && value.value.length == 1) {\n value = value.value[0];\n }\n\n argsComma.push(value);\n }\n\n if (parserInput.$char(',')) {\n continue;\n }\n\n if (parserInput.$char(';') || isSemiColonSeparated) {\n isSemiColonSeparated = true;\n value = (argsComma.length < 1) ? argsComma[0]\n : new tree.Value(argsComma);\n argsSemiColon.push(value);\n argsComma = [];\n }\n }\n\n parserInput.forget();\n return isSemiColonSeparated ? argsSemiColon : argsComma;\n },\n literal: function () {\n return this.dimension() ||\n this.color() ||\n this.quoted() ||\n this.unicodeDescriptor();\n },\n\n // Assignments are argument entities for calls.\n // They are present in ie filter properties as shown below.\n //\n // filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )\n //\n\n assignment: function () {\n let key;\n let value;\n parserInput.save();\n key = parserInput.$re(/^\\w+(?=\\s?=)/i);\n if (!key) {\n parserInput.restore();\n return;\n }\n if (!parserInput.$char('=')) {\n parserInput.restore();\n return;\n }\n value = parsers.entity();\n if (value) {\n parserInput.forget();\n return new(tree.Assignment)(key, value);\n } else {\n parserInput.restore();\n }\n },\n\n //\n // Parse url() tokens\n //\n // We use a specific rule for urls, because they don't really behave like\n // standard function calls. The difference is that the argument doesn't have\n // to be enclosed within a string, so it can't be parsed as an Expression.\n //\n url: function () {\n let value;\n const index = parserInput.i;\n\n parserInput.autoCommentAbsorb = false;\n\n if (!parserInput.$str('url(')) {\n parserInput.autoCommentAbsorb = true;\n return;\n }\n\n value = this.quoted() || this.variable() || this.property() ||\n parserInput.$re(/^(?:(?:\\\\[\\(\\)'\"])|[^\\(\\)'\"])+/) || '';\n\n parserInput.autoCommentAbsorb = true;\n\n expectChar(')');\n\n return new(tree.URL)((value.value != null || \n value instanceof tree.Variable || \n value instanceof tree.Property) ?\n value : new(tree.Anonymous)(value, index), index, fileInfo);\n },\n\n //\n // A Variable entity, such as `@fink`, in\n //\n // width: @fink + 2px\n //\n // We use a different parser for variable definitions,\n // see `parsers.variable`.\n //\n variable: function () {\n let ch;\n let name;\n const index = parserInput.i;\n\n parserInput.save();\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^@@?[\\w-]+/))) {\n ch = parserInput.currentChar();\n if (ch === '(' || ch === '[' && !parserInput.prevChar().match(/^\\s/)) {\n // this may be a VariableCall lookup\n const result = parsers.variableCall(name);\n if (result) {\n parserInput.forget();\n return result;\n }\n }\n parserInput.forget();\n return new(tree.Variable)(name, index, fileInfo);\n }\n parserInput.restore();\n },\n\n // A variable entity using the protective {} e.g. @{var}\n variableCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '@' && (curly = parserInput.$re(/^@\\{([\\w-]+)\\}/))) {\n return new(tree.Variable)(`@${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Property accessor, such as `$color`, in\n //\n // background-color: $color\n //\n property: function () {\n let name;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (name = parserInput.$re(/^\\$[\\w-]+/))) {\n return new(tree.Property)(name, index, fileInfo);\n }\n },\n\n // A property entity useing the protective {} e.g. ${prop}\n propertyCurly: function () {\n let curly;\n const index = parserInput.i;\n\n if (parserInput.currentChar() === '$' && (curly = parserInput.$re(/^\\$\\{([\\w-]+)\\}/))) {\n return new(tree.Property)(`$${curly[1]}`, index, fileInfo);\n }\n },\n //\n // A Hexadecimal color\n //\n // #4F3C2F\n //\n // `rgb` and `hsl` colors are parsed through the `entities.call` parser.\n //\n color: function () {\n let rgb;\n parserInput.save();\n\n if (parserInput.currentChar() === '#' && (rgb = parserInput.$re(/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})([\\w.#\\[])?/))) {\n if (!rgb[2]) {\n parserInput.forget();\n return new(tree.Color)(rgb[1], undefined, rgb[0]);\n } \n }\n parserInput.restore();\n },\n\n colorKeyword: function () {\n parserInput.save();\n const autoCommentAbsorb = parserInput.autoCommentAbsorb;\n parserInput.autoCommentAbsorb = false;\n const k = parserInput.$re(/^[_A-Za-z-][_A-Za-z0-9-]+/);\n parserInput.autoCommentAbsorb = autoCommentAbsorb;\n if (!k) {\n parserInput.forget();\n return;\n }\n parserInput.restore();\n const color = tree.Color.fromKeyword(k);\n if (color) {\n parserInput.$str(k);\n return color;\n }\n },\n\n //\n // A Dimension, that is, a number and a unit\n //\n // 0.5em 95%\n //\n dimension: function () {\n if (parserInput.peekNotNumeric()) {\n return;\n }\n\n const value = parserInput.$re(/^([+-]?\\d*\\.?\\d+)(%|[a-z_]+)?/i);\n if (value) {\n return new(tree.Dimension)(value[1], value[2]);\n }\n },\n\n //\n // A unicode descriptor, as is used in unicode-range\n //\n // U+0?? or U+00A1-00A9\n //\n unicodeDescriptor: function () {\n let ud;\n\n ud = parserInput.$re(/^U\\+[0-9a-fA-F?]+(\\-[0-9a-fA-F?]+)?/);\n if (ud) {\n return new(tree.UnicodeDescriptor)(ud[0]);\n }\n },\n\n //\n // JavaScript code to be evaluated\n //\n // `window.location.href`\n //\n javascript: function () {\n let js;\n const index = parserInput.i;\n\n parserInput.save();\n\n const escape = parserInput.$char('~');\n const jsQuote = parserInput.$char('`');\n\n if (!jsQuote) {\n parserInput.restore();\n return;\n }\n\n js = parserInput.$re(/^[^`]*`/);\n if (js) {\n parserInput.forget();\n return new(tree.JavaScript)(js.substr(0, js.length - 1), Boolean(escape), index, fileInfo);\n }\n parserInput.restore('invalid javascript definition');\n }\n },\n\n //\n // The variable part of a variable definition. Used in the `rule` parser\n //\n // @fink:\n //\n variable: function () {\n let name;\n\n if (parserInput.currentChar() === '@' && (name = parserInput.$re(/^(@[\\w-]+)\\s*:/))) { return name[1]; }\n },\n\n //\n // Call a variable value to retrieve a detached ruleset\n // or a value from a detached ruleset's rules.\n //\n // @fink();\n // @fink;\n // color: @fink[@color];\n //\n variableCall: function (parsedName) {\n let lookups;\n let important;\n const i = parserInput.i;\n const inValue = !!parsedName;\n let name = parsedName;\n\n parserInput.save();\n\n if (name || (parserInput.currentChar() === '@'\n && (name = parserInput.$re(/^(@[\\w-]+)(\\(\\s*\\))?/)))) {\n\n lookups = this.mixin.ruleLookups();\n\n if (!lookups && ((inValue && parserInput.$str('()') !== '()') || (name[2] !== '()'))) {\n parserInput.restore('Missing \\'[...]\\' lookup in variable call');\n return;\n }\n\n if (!inValue) {\n name = name[1];\n }\n\n if (lookups && parsers.important()) {\n important = true;\n }\n\n const call = new tree.VariableCall(name, i, fileInfo);\n if (!inValue && parsers.end()) {\n parserInput.forget();\n return call;\n }\n else {\n parserInput.forget();\n return new tree.NamespaceValue(call, lookups, important, i, fileInfo);\n }\n }\n\n parserInput.restore();\n },\n\n //\n // extend syntax - used to extend selectors\n //\n extend: function(isRule) {\n let elements;\n let e;\n const index = parserInput.i;\n let option;\n let extendList;\n let extend;\n\n if (!parserInput.$str(isRule ? '&:extend(' : ':extend(')) {\n return;\n }\n\n do {\n option = null;\n elements = null;\n while (!(option = parserInput.$re(/^(all)(?=\\s*(\\)|,))/))) {\n e = this.element();\n if (!e) {\n break;\n }\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n }\n\n option = option && option[1];\n if (!elements) {\n error('Missing target selector for :extend().');\n }\n extend = new(tree.Extend)(new(tree.Selector)(elements), option, index, fileInfo);\n if (extendList) {\n extendList.push(extend);\n } else {\n extendList = [ extend ];\n }\n } while (parserInput.$char(','));\n\n expect(/^\\)/);\n\n if (isRule) {\n expect(/^;/);\n }\n\n return extendList;\n },\n\n //\n // extendRule - used in a rule to extend all the parent selectors\n //\n extendRule: function() {\n return this.extend(true);\n },\n\n //\n // Mixins\n //\n mixin: {\n //\n // A Mixin call, with an optional argument list\n //\n // #mixins > .square(#fff);\n // #mixins.square(#fff);\n // .rounded(4px, black);\n // .button;\n //\n // We can lookup / return a value using the lookup syntax:\n //\n // color: #mixin.square(#fff)[@color];\n //\n // The `while` loop is there because mixins can be\n // namespaced, but we only support the child and descendant\n // selector for now.\n //\n call: function (inValue, getLookup) {\n const s = parserInput.currentChar();\n let important = false;\n let lookups;\n const index = parserInput.i;\n let elements;\n let args;\n let hasParens;\n\n if (s !== '.' && s !== '#') { return; }\n\n parserInput.save(); // stop us absorbing part of an invalid selector\n\n elements = this.elements();\n\n if (elements) {\n if (parserInput.$char('(')) {\n args = this.args(true).args;\n expectChar(')');\n hasParens = true;\n }\n\n if (getLookup !== false) {\n lookups = this.ruleLookups();\n }\n if (getLookup === true && !lookups) {\n parserInput.restore();\n return;\n }\n\n if (inValue && !lookups && !hasParens) {\n // This isn't a valid in-value mixin call\n parserInput.restore();\n return;\n }\n\n if (!inValue && parsers.important()) {\n important = true;\n }\n\n if (inValue || parsers.end()) {\n parserInput.forget();\n const mixin = new(tree.mixin.Call)(elements, args, index, fileInfo, !lookups && important);\n if (lookups) {\n return new tree.NamespaceValue(mixin, lookups, important);\n }\n else {\n return mixin;\n }\n }\n }\n\n parserInput.restore();\n },\n /**\n * Matching elements for mixins\n * (Start with . or # and can have > )\n */\n elements: function() {\n let elements;\n let e;\n let c;\n let elem;\n let elemIndex;\n const re = /^[#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/;\n while (true) {\n elemIndex = parserInput.i;\n e = parserInput.$re(re);\n \n if (!e) {\n break;\n }\n elem = new(tree.Element)(c, e, false, elemIndex, fileInfo);\n if (elements) {\n elements.push(elem);\n } else {\n elements = [ elem ];\n }\n c = parserInput.$char('>');\n }\n return elements;\n },\n args: function (isCall) {\n const entities = parsers.entities;\n const returner = { args:null, variadic: false };\n let expressions = [];\n const argsSemiColon = [];\n const argsComma = [];\n let isSemiColonSeparated;\n let expressionContainsNamed;\n let name;\n let nameLoop;\n let value;\n let arg;\n let expand;\n let hasSep = true;\n\n parserInput.save();\n\n while (true) {\n if (isCall) {\n arg = parsers.detachedRuleset() || parsers.expression();\n } else {\n parserInput.commentStore.length = 0;\n if (parserInput.$str('...')) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ variadic: true });\n break;\n }\n arg = entities.variable() || entities.property() || entities.literal() || entities.keyword() || this.call(true);\n }\n\n if (!arg || !hasSep) {\n break;\n }\n\n nameLoop = null;\n if (arg.throwAwayComments) {\n arg.throwAwayComments();\n }\n value = arg;\n let val = null;\n\n if (isCall) {\n // Variable\n if (arg.value && arg.value.length == 1) {\n val = arg.value[0];\n }\n } else {\n val = arg;\n }\n\n if (val && (val instanceof tree.Variable || val instanceof tree.Property)) {\n if (parserInput.$char(':')) {\n if (expressions.length > 0) {\n if (isSemiColonSeparated) {\n error('Cannot mix ; and , as delimiter types');\n }\n expressionContainsNamed = true;\n }\n\n value = parsers.detachedRuleset() || parsers.expression();\n\n if (!value) {\n if (isCall) {\n error('could not understand value for named argument');\n } else {\n parserInput.restore();\n returner.args = [];\n return returner;\n }\n }\n nameLoop = (name = val.name);\n } else if (parserInput.$str('...')) {\n if (!isCall) {\n returner.variadic = true;\n if (parserInput.$char(';') && !isSemiColonSeparated) {\n isSemiColonSeparated = true;\n }\n (isSemiColonSeparated ? argsSemiColon : argsComma)\n .push({ name: arg.name, variadic: true });\n break;\n } else {\n expand = true;\n }\n } else if (!isCall) {\n name = nameLoop = val.name;\n value = null;\n }\n }\n\n if (value) {\n expressions.push(value);\n }\n\n argsComma.push({ name:nameLoop, value, expand });\n\n if (parserInput.$char(',')) {\n hasSep = true;\n continue;\n }\n hasSep = parserInput.$char(';') === ';';\n\n if (hasSep || isSemiColonSeparated) {\n\n if (expressionContainsNamed) {\n error('Cannot mix ; and , as delimiter types');\n }\n\n isSemiColonSeparated = true;\n\n if (expressions.length > 1) {\n value = new(tree.Value)(expressions);\n }\n argsSemiColon.push({ name, value, expand });\n\n name = null;\n expressions = [];\n expressionContainsNamed = false;\n }\n }\n\n parserInput.forget();\n returner.args = isSemiColonSeparated ? argsSemiColon : argsComma;\n return returner;\n },\n //\n // A Mixin definition, with a list of parameters\n //\n // .rounded (@radius: 2px, @color) {\n // ...\n // }\n //\n // Until we have a finer grained state-machine, we have to\n // do a look-ahead, to make sure we don't have a mixin call.\n // See the `rule` function for more information.\n //\n // We start by matching `.rounded (`, and then proceed on to\n // the argument list, which has optional default values.\n // We store the parameters in `params`, with a `value` key,\n // if there is a value, such as in the case of `@radius`.\n //\n // Once we've got our params list, and a closing `)`, we parse\n // the `{...}` block.\n //\n definition: function () {\n let name;\n let params = [];\n let match;\n let ruleset;\n let cond;\n let variadic = false;\n if ((parserInput.currentChar() !== '.' && parserInput.currentChar() !== '#') ||\n parserInput.peek(/^[^{]*\\}/)) {\n return;\n }\n\n parserInput.save();\n\n match = parserInput.$re(/^([#.](?:[\\w-]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\\s*\\(/);\n if (match) {\n name = match[1];\n\n const argInfo = this.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n\n // .mixincall(\"@{a}\");\n // looks a bit like a mixin definition..\n // also\n // .mixincall(@a: {rule: set;});\n // so we have to be nice and restore\n if (!parserInput.$char(')')) {\n parserInput.restore('Missing closing \\')\\'');\n return;\n }\n\n parserInput.commentStore.length = 0;\n\n if (parserInput.$str('when')) { // Guard\n cond = expect(parsers.conditions, 'expected condition');\n }\n\n ruleset = parsers.block();\n\n if (ruleset) {\n parserInput.forget();\n return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);\n } else {\n parserInput.restore();\n }\n } else {\n parserInput.forget();\n }\n },\n \n ruleLookups: function() {\n let rule;\n let args;\n const lookups = [];\n\n if (parserInput.currentChar() !== '[') { \n return;\n }\n\n while (true) {\n parserInput.save();\n args = null;\n rule = this.lookupValue();\n if (!rule && rule !== '') {\n parserInput.restore();\n break;\n }\n lookups.push(rule);\n parserInput.forget();\n }\n if (lookups.length > 0) {\n return lookups;\n }\n },\n \n lookupValue: function() {\n parserInput.save();\n \n if (!parserInput.$char('[')) { \n parserInput.restore();\n return;\n }\n \n const name = parserInput.$re(/^(?:[@$]{0,2})[_a-zA-Z0-9-]*/);\n \n if (!parserInput.$char(']')) {\n parserInput.restore();\n return;\n } \n\n if (name || name === '') {\n parserInput.forget();\n return name;\n }\n \n parserInput.restore();\n }\n },\n //\n // Entities are the smallest recognized token,\n // and can be found inside a rule's value.\n //\n entity: function () {\n const entities = this.entities;\n\n return this.comment() || entities.literal() || entities.variable() || entities.url() ||\n entities.property() || entities.call() || entities.keyword() || this.mixin.call(true) ||\n entities.javascript();\n },\n\n //\n // A Declaration terminator. Note that we use `peek()` to check for '}',\n // because the `block` rule will be expecting it, but we still need to make sure\n // it's there, if ';' was omitted.\n //\n end: function () {\n return parserInput.$char(';') || parserInput.peek('}');\n },\n\n //\n // IE's alpha function\n //\n // alpha(opacity=88)\n //\n ieAlpha: function () {\n let value;\n\n // http://jsperf.com/case-insensitive-regex-vs-strtolower-then-regex/18\n if (!parserInput.$re(/^opacity=/i)) { return; }\n value = parserInput.$re(/^\\d+/);\n if (!value) {\n value = expect(parsers.entities.variable, 'Could not parse alpha');\n value = `@{${value.name.slice(1)}}`;\n }\n expectChar(')');\n return new tree.Quoted('', `alpha(opacity=${value})`);\n },\n\n //\n // A Selector Element\n //\n // div\n // + h1\n // #socks\n // input[type=\"text\"]\n //\n // Elements are the building blocks for Selectors,\n // they are made out of a `Combinator` (see combinator rule),\n // and an element name, such as a tag a class, or `*`.\n //\n element: function () {\n let e;\n let c;\n let v;\n const index = parserInput.i;\n\n c = this.combinator();\n\n e = parserInput.$re(/^(?:\\d+\\.\\d+|\\d+)%/) ||\n parserInput.$re(/^(?:[.#]?|:*)(?:[\\w-]|[^\\x00-\\x9f]|\\\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||\n parserInput.$char('*') || parserInput.$char('&') || this.attribute() ||\n parserInput.$re(/^\\([^&()@]+\\)/) || parserInput.$re(/^[\\.#:](?=@)/) ||\n this.entities.variableCurly();\n\n if (!e) {\n parserInput.save();\n if (parserInput.$char('(')) {\n if ((v = this.selector(false)) && parserInput.$char(')')) {\n e = new(tree.Paren)(v);\n parserInput.forget();\n } else {\n parserInput.restore('Missing closing \\')\\'');\n }\n } else {\n parserInput.forget();\n }\n }\n\n if (e) { return new(tree.Element)(c, e, e instanceof tree.Variable, index, fileInfo); }\n },\n\n //\n // Combinators combine elements together, in a Selector.\n //\n // Because our parser isn't white-space sensitive, special care\n // has to be taken, when parsing the descendant combinator, ` `,\n // as it's an empty space. We have to check the previous character\n // in the input, to see if it's a ` ` character. More info on how\n // we deal with this in *combinator.js*.\n //\n combinator: function () {\n let c = parserInput.currentChar();\n\n if (c === '/') {\n parserInput.save();\n const slashedCombinator = parserInput.$re(/^\\/[a-z]+\\//i);\n if (slashedCombinator) {\n parserInput.forget();\n return new(tree.Combinator)(slashedCombinator);\n }\n parserInput.restore();\n }\n\n if (c === '>' || c === '+' || c === '~' || c === '|' || c === '^') {\n parserInput.i++;\n if (c === '^' && parserInput.currentChar() === '^') {\n c = '^^';\n parserInput.i++;\n }\n while (parserInput.isWhitespace()) { parserInput.i++; }\n return new(tree.Combinator)(c);\n } else if (parserInput.isWhitespace(-1)) {\n return new(tree.Combinator)(' ');\n } else {\n return new(tree.Combinator)(null);\n }\n },\n //\n // A CSS Selector\n // with less extensions e.g. the ability to extend and guard\n //\n // .class > div + h1\n // li a:hover\n //\n // Selectors are made out of one or more Elements, see above.\n //\n selector: function (isLess) {\n const index = parserInput.i;\n let elements;\n let extendList;\n let c;\n let e;\n let allExtends;\n let when;\n let condition;\n isLess = isLess !== false;\n while ((isLess && (extendList = this.extend())) || (isLess && (when = parserInput.$str('when'))) || (e = this.element())) {\n if (when) {\n condition = expect(this.conditions, 'expected condition');\n } else if (condition) {\n error('CSS guard can only be used at the end of selector');\n } else if (extendList) {\n if (allExtends) {\n allExtends = allExtends.concat(extendList);\n } else {\n allExtends = extendList;\n }\n } else {\n if (allExtends) { error('Extend can only be used at the end of selector'); }\n c = parserInput.currentChar();\n if (elements) {\n elements.push(e);\n } else {\n elements = [ e ];\n }\n e = null;\n }\n if (c === '{' || c === '}' || c === ';' || c === ',' || c === ')') {\n break;\n }\n }\n\n if (elements) { return new(tree.Selector)(elements, allExtends, condition, index, fileInfo); }\n if (allExtends) { error('Extend must be used to extend a selector, it cannot be used on its own'); }\n },\n selectors: function () {\n let s;\n let selectors;\n while (true) {\n s = this.selector();\n if (!s) {\n break;\n }\n if (selectors) {\n selectors.push(s);\n } else {\n selectors = [ s ];\n }\n parserInput.commentStore.length = 0;\n if (s.condition && selectors.length > 1) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n if (!parserInput.$char(',')) { break; }\n if (s.condition) {\n error(\"Guards are only currently allowed on a single selector.\");\n }\n parserInput.commentStore.length = 0;\n }\n return selectors;\n },\n attribute: function () {\n if (!parserInput.$char('[')) { return; }\n\n const entities = this.entities;\n let key;\n let val;\n let op;\n\n if (!(key = entities.variableCurly())) {\n key = expect(/^(?:[_A-Za-z0-9-\\*]*\\|)?(?:[_A-Za-z0-9-]|\\\\.)+/);\n }\n\n op = parserInput.$re(/^[|~*$^]?=/);\n if (op) {\n val = entities.quoted() || parserInput.$re(/^[0-9]+%/) || parserInput.$re(/^[\\w-]+/) || entities.variableCurly();\n }\n\n expectChar(']');\n\n return new(tree.Attribute)(key, op, val);\n },\n\n //\n // The `block` rule is used by `ruleset` and `mixin.definition`.\n // It's a wrapper around the `primary` rule, with added `{}`.\n //\n block: function () {\n let content;\n if (parserInput.$char('{') && (content = this.primary()) && parserInput.$char('}')) {\n return content;\n }\n },\n\n blockRuleset: function() {\n let block = this.block();\n\n if (block) {\n block = new tree.Ruleset(null, block);\n }\n return block;\n },\n\n detachedRuleset: function() {\n let argInfo;\n let params;\n let variadic;\n\n parserInput.save();\n if (parserInput.$re(/^[.#]\\(/)) {\n /**\n * DR args currently only implemented for each() function, and not \n * yet settable as `@dr: #(@arg) {}`\n * This should be done when DRs are merged with mixins.\n * See: https://github.com/less/less-meta/issues/16\n */\n argInfo = this.mixin.args(false);\n params = argInfo.args;\n variadic = argInfo.variadic;\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return;\n }\n }\n const blockRuleset = this.blockRuleset();\n if (blockRuleset) {\n parserInput.forget();\n if (params) {\n return new tree.mixin.Definition(null, params, blockRuleset, null, variadic);\n }\n return new tree.DetachedRuleset(blockRuleset);\n }\n parserInput.restore();\n },\n\n //\n // div, .class, body > p {...}\n //\n ruleset: function () {\n let selectors;\n let rules;\n let debugInfo;\n\n parserInput.save();\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(parserInput.i);\n }\n\n selectors = this.selectors();\n\n if (selectors && (rules = this.block())) {\n parserInput.forget();\n const ruleset = new(tree.Ruleset)(selectors, rules, context.strictImports);\n if (context.dumpLineNumbers) {\n ruleset.debugInfo = debugInfo;\n }\n return ruleset;\n } else {\n parserInput.restore();\n }\n },\n declaration: function () {\n let name;\n let value;\n const index = parserInput.i;\n let hasDR;\n const c = parserInput.currentChar();\n let important;\n let merge;\n let isVariable;\n\n if (c === '.' || c === '#' || c === '&' || c === ':') { return; }\n\n parserInput.save();\n\n name = this.variable() || this.ruleProperty();\n if (name) {\n isVariable = typeof name === 'string';\n\n if (isVariable) {\n value = this.detachedRuleset();\n if (value) {\n hasDR = true;\n }\n }\n\n parserInput.commentStore.length = 0;\n if (!value) {\n // a name returned by this.ruleProperty() is always an array of the form:\n // [string-1, ..., string-n, \"\"] or [string-1, ..., string-n, \"+\"]\n // where each item is a tree.Keyword or tree.Variable\n merge = !isVariable && name.length > 1 && name.pop().value;\n\n // Custom property values get permissive parsing\n if (name[0].value && name[0].value.slice(0, 2) === '--') {\n value = this.permissiveValue();\n }\n // Try to store values as anonymous\n // If we need the value later we'll re-parse it in ruleset.parseValue\n else {\n value = this.anonymousValue();\n }\n if (value) {\n parserInput.forget();\n // anonymous values absorb the end ';' which is required for them to work\n return new(tree.Declaration)(name, value, false, merge, index, fileInfo);\n }\n\n if (!value) {\n value = this.value();\n }\n\n if (value) {\n important = this.important();\n } else if (isVariable) {\n // As a last resort, try permissiveValue\n value = this.permissiveValue();\n }\n }\n\n if (value && (this.end() || hasDR)) {\n parserInput.forget();\n return new(tree.Declaration)(name, value, important, merge, index, fileInfo);\n }\n else {\n parserInput.restore();\n }\n } else {\n parserInput.restore();\n }\n },\n anonymousValue: function () {\n const index = parserInput.i;\n const match = parserInput.$re(/^([^.#@\\$+\\/'\"*`(;{}-]*);/);\n if (match) {\n return new(tree.Anonymous)(match[1], index);\n }\n },\n /**\n * Used for custom properties, at-rules, and variables (as fallback)\n * Parses almost anything inside of {} [] () \"\" blocks\n * until it reaches outer-most tokens.\n * \n * First, it will try to parse comments and entities to reach\n * the end. This is mostly like the Expression parser except no\n * math is allowed.\n */\n permissiveValue: function (untilTokens) {\n let i;\n let e;\n let done;\n let value;\n const tok = untilTokens || ';';\n const index = parserInput.i;\n const result = [];\n\n function testCurrentChar() {\n const char = parserInput.currentChar();\n if (typeof tok === 'string') {\n return char === tok;\n } else {\n return tok.test(char);\n }\n }\n if (testCurrentChar()) {\n return;\n }\n value = [];\n do {\n e = this.comment();\n if (e) {\n value.push(e);\n continue;\n }\n e = this.entity();\n if (e) {\n value.push(e);\n }\n } while (e);\n\n done = testCurrentChar();\n\n if (value.length > 0) {\n value = new(tree.Expression)(value);\n if (done) {\n return value;\n }\n else {\n result.push(value);\n }\n // Preserve space before $parseUntil as it will not\n if (parserInput.prevChar() === ' ') {\n result.push(new tree.Anonymous(' ', index));\n }\n }\n parserInput.save();\n\n value = parserInput.$parseUntil(tok);\n\n if (value) {\n if (typeof value === 'string') {\n error(`Expected '${value}'`, 'Parse');\n }\n if (value.length === 1 && value[0] === ' ') {\n parserInput.forget();\n return new tree.Anonymous('', index);\n }\n let item;\n for (i = 0; i < value.length; i++) {\n item = value[i];\n if (Array.isArray(item)) {\n // Treat actual quotes as normal quoted values\n result.push(new tree.Quoted(item[0], item[1], true, index, fileInfo));\n }\n else {\n if (i === value.length - 1) {\n item = item.trim();\n }\n // Treat like quoted values, but replace vars like unquoted expressions\n const quote = new tree.Quoted('\\'', item, true, index, fileInfo);\n quote.variableRegex = /@([\\w-]+)/g;\n quote.propRegex = /\\$([\\w-]+)/g;\n result.push(quote);\n }\n }\n parserInput.forget();\n return new tree.Expression(result, true);\n }\n parserInput.restore();\n },\n\n //\n // An @import atrule\n //\n // @import \"lib\";\n //\n // Depending on our environment, importing is done differently:\n // In the browser, it's an XHR request, in Node, it would be a\n // file-system operation. The function used for importing is\n // stored in `import`, which we pass to the Import constructor.\n //\n 'import': function () {\n let path;\n let features;\n const index = parserInput.i;\n\n const dir = parserInput.$re(/^@import?\\s+/);\n\n if (dir) {\n const options = (dir ? this.importOptions() : null) || {};\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n features = this.mediaFeatures();\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon or unrecognised media features on import');\n }\n features = features && new(tree.Value)(features);\n return new(tree.Import)(path, features, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed import statement');\n }\n }\n },\n\n importOptions: function() {\n let o;\n const options = {};\n let optionName;\n let value;\n\n // list of options, surrounded by parens\n if (!parserInput.$char('(')) { return null; }\n do {\n o = this.importOption();\n if (o) {\n optionName = o;\n value = true;\n switch (optionName) {\n case 'css':\n optionName = 'less';\n value = false;\n break;\n case 'once':\n optionName = 'multiple';\n value = false;\n break;\n }\n options[optionName] = value;\n if (!parserInput.$char(',')) { break; }\n }\n } while (o);\n expectChar(')');\n return options;\n },\n\n importOption: function() {\n const opt = parserInput.$re(/^(less|css|multiple|once|inline|reference|optional)/);\n if (opt) {\n return opt[1];\n }\n },\n\n mediaFeature: function () {\n const entities = this.entities;\n const nodes = [];\n let e;\n let p;\n parserInput.save();\n do {\n e = entities.keyword() || entities.variable() || entities.mixinLookup();\n if (e) {\n nodes.push(e);\n } else if (parserInput.$char('(')) {\n p = this.property();\n e = this.value();\n if (parserInput.$char(')')) {\n if (p && e) {\n nodes.push(new(tree.Paren)(new(tree.Declaration)(p, e, null, null, parserInput.i, fileInfo, true)));\n } else if (e) {\n nodes.push(new(tree.Paren)(e));\n } else {\n error('badly formed media feature definition');\n }\n } else {\n error('Missing closing \\')\\'', 'Parse');\n }\n }\n } while (e);\n\n parserInput.forget();\n if (nodes.length > 0) {\n return new(tree.Expression)(nodes);\n }\n },\n\n mediaFeatures: function () {\n const entities = this.entities;\n const features = [];\n let e;\n do {\n e = this.mediaFeature();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n } else {\n e = entities.variable() || entities.mixinLookup();\n if (e) {\n features.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n }\n } while (e);\n\n return features.length > 0 ? features : null;\n },\n\n media: function () {\n let features;\n let rules;\n let media;\n let debugInfo;\n const index = parserInput.i;\n\n if (context.dumpLineNumbers) {\n debugInfo = getDebugInfo(index);\n }\n\n parserInput.save();\n\n if (parserInput.$str('@media')) {\n features = this.mediaFeatures();\n\n rules = this.block();\n\n if (!rules) {\n error('media definitions require block statements after any features');\n }\n\n parserInput.forget();\n\n media = new(tree.Media)(rules, features, index, fileInfo);\n if (context.dumpLineNumbers) {\n media.debugInfo = debugInfo;\n }\n\n return media;\n }\n\n parserInput.restore();\n },\n\n //\n\n // A @plugin directive, used to import plugins dynamically.\n //\n // @plugin (args) \"lib\";\n //\n plugin: function () {\n let path;\n let args;\n let options;\n const index = parserInput.i;\n const dir = parserInput.$re(/^@plugin?\\s+/);\n\n if (dir) {\n args = this.pluginArgs();\n\n if (args) {\n options = {\n pluginArgs: args,\n isPlugin: true\n };\n }\n else {\n options = { isPlugin: true };\n }\n\n if ((path = this.entities.quoted() || this.entities.url())) {\n\n if (!parserInput.$char(';')) {\n parserInput.i = index;\n error('missing semi-colon on @plugin');\n }\n return new(tree.Import)(path, null, options, index, fileInfo);\n }\n else {\n parserInput.i = index;\n error('malformed @plugin statement');\n }\n }\n },\n\n pluginArgs: function() {\n // list of options, surrounded by parens\n parserInput.save();\n if (!parserInput.$char('(')) {\n parserInput.restore();\n return null;\n }\n const args = parserInput.$re(/^\\s*([^\\);]+)\\)\\s*/);\n if (args[1]) {\n parserInput.forget();\n return args[1].trim();\n }\n else { \n parserInput.restore();\n return null;\n }\n },\n\n //\n // A CSS AtRule\n //\n // @charset \"utf-8\";\n //\n atrule: function () {\n const index = parserInput.i;\n let name;\n let value;\n let rules;\n let nonVendorSpecificName;\n let hasIdentifier;\n let hasExpression;\n let hasUnknown;\n let hasBlock = true;\n let isRooted = true;\n\n if (parserInput.currentChar() !== '@') { return; }\n\n value = this['import']() || this.plugin() || this.media();\n if (value) {\n return value;\n }\n\n parserInput.save();\n\n name = parserInput.$re(/^@[a-z-]+/);\n\n if (!name) { return; }\n\n nonVendorSpecificName = name;\n if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {\n nonVendorSpecificName = `@${name.slice(name.indexOf('-', 2) + 1)}`;\n }\n\n switch (nonVendorSpecificName) {\n case '@charset':\n hasIdentifier = true;\n hasBlock = false;\n break;\n case '@namespace':\n hasExpression = true;\n hasBlock = false;\n break;\n case '@keyframes':\n case '@counter-style':\n hasIdentifier = true;\n break;\n case '@document':\n case '@supports':\n hasUnknown = true;\n isRooted = false;\n break;\n default:\n hasUnknown = true;\n break;\n }\n\n parserInput.commentStore.length = 0;\n\n if (hasIdentifier) {\n value = this.entity();\n if (!value) {\n error(`expected ${name} identifier`);\n }\n } else if (hasExpression) {\n value = this.expression();\n if (!value) {\n error(`expected ${name} expression`);\n }\n } else if (hasUnknown) {\n value = this.permissiveValue(/^[{;]/);\n hasBlock = (parserInput.currentChar() === '{');\n if (!value) {\n if (!hasBlock && parserInput.currentChar() !== ';') {\n error(`${name} rule is missing block or ending semi-colon`);\n }\n }\n else if (!value.value) {\n value = null;\n }\n }\n\n if (hasBlock) {\n rules = this.blockRuleset();\n }\n\n if (rules || (!hasBlock && value && parserInput.$char(';'))) {\n parserInput.forget();\n return new(tree.AtRule)(name, value, rules, index, fileInfo,\n context.dumpLineNumbers ? getDebugInfo(index) : null,\n isRooted\n );\n }\n\n parserInput.restore('at-rule options not recognised');\n },\n\n //\n // A Value is a comma-delimited list of Expressions\n //\n // font-family: Baskerville, Georgia, serif;\n //\n // In a Rule, a Value represents everything after the `:`,\n // and before the `;`.\n //\n value: function () {\n let e;\n const expressions = [];\n const index = parserInput.i;\n\n do {\n e = this.expression();\n if (e) {\n expressions.push(e);\n if (!parserInput.$char(',')) { break; }\n }\n } while (e);\n\n if (expressions.length > 0) {\n return new(tree.Value)(expressions, index);\n }\n },\n important: function () {\n if (parserInput.currentChar() === '!') {\n return parserInput.$re(/^! *important/);\n }\n },\n sub: function () {\n let a;\n let e;\n\n parserInput.save();\n if (parserInput.$char('(')) {\n a = this.addition();\n if (a && parserInput.$char(')')) {\n parserInput.forget();\n e = new(tree.Expression)([a]);\n e.parens = true;\n return e;\n }\n parserInput.restore('Expected \\')\\'');\n return;\n }\n parserInput.restore();\n },\n multiplication: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.operand();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n if (parserInput.peek(/^\\/[*\\/]/)) {\n break;\n }\n\n parserInput.save();\n\n op = parserInput.$char('/') || parserInput.$char('*') || parserInput.$str('./');\n\n if (!op) { parserInput.forget(); break; }\n\n a = this.operand();\n\n if (!a) { parserInput.restore(); break; }\n parserInput.forget();\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n addition: function () {\n let m;\n let a;\n let op;\n let operation;\n let isSpaced;\n m = this.multiplication();\n if (m) {\n isSpaced = parserInput.isWhitespace(-1);\n while (true) {\n op = parserInput.$re(/^[-+]\\s+/) || (!isSpaced && (parserInput.$char('+') || parserInput.$char('-')));\n if (!op) {\n break;\n }\n a = this.multiplication();\n if (!a) {\n break;\n }\n\n m.parensInOp = true;\n a.parensInOp = true;\n operation = new(tree.Operation)(op, [operation || m, a], isSpaced);\n isSpaced = parserInput.isWhitespace(-1);\n }\n return operation || m;\n }\n },\n conditions: function () {\n let a;\n let b;\n const index = parserInput.i;\n let condition;\n\n a = this.condition(true);\n if (a) {\n while (true) {\n if (!parserInput.peek(/^,\\s*(not\\s*)?\\(/) || !parserInput.$char(',')) {\n break;\n }\n b = this.condition(true);\n if (!b) {\n break;\n }\n condition = new(tree.Condition)('or', condition || a, b, index);\n }\n return condition || a;\n }\n },\n condition: function (needsParens) {\n let result;\n let logical;\n let next;\n function or() {\n return parserInput.$str('or');\n }\n\n result = this.conditionAnd(needsParens);\n if (!result) {\n return ;\n }\n logical = or();\n if (logical) {\n next = this.condition(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n conditionAnd: function (needsParens) {\n let result;\n let logical;\n let next;\n const self = this;\n function insideCondition() {\n const cond = self.negatedCondition(needsParens) || self.parenthesisCondition(needsParens);\n if (!cond && !needsParens) {\n return self.atomicCondition(needsParens);\n }\n return cond;\n }\n function and() {\n return parserInput.$str('and');\n }\n\n result = insideCondition();\n if (!result) {\n return ;\n }\n logical = and();\n if (logical) {\n next = this.conditionAnd(needsParens);\n if (next) {\n result = new(tree.Condition)(logical, result, next);\n } else {\n return ;\n }\n }\n return result;\n },\n negatedCondition: function (needsParens) {\n if (parserInput.$str('not')) {\n const result = this.parenthesisCondition(needsParens);\n if (result) {\n result.negate = !result.negate;\n }\n return result;\n }\n },\n parenthesisCondition: function (needsParens) {\n function tryConditionFollowedByParenthesis(me) {\n let body;\n parserInput.save();\n body = me.condition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore();\n return ;\n }\n parserInput.forget();\n return body;\n }\n\n let body;\n parserInput.save();\n if (!parserInput.$str('(')) {\n parserInput.restore();\n return ;\n }\n body = tryConditionFollowedByParenthesis(this);\n if (body) {\n parserInput.forget();\n return body;\n }\n\n body = this.atomicCondition(needsParens);\n if (!body) {\n parserInput.restore();\n return ;\n }\n if (!parserInput.$char(')')) {\n parserInput.restore(`expected ')' got '${parserInput.currentChar()}'`);\n return ;\n }\n parserInput.forget();\n return body;\n },\n atomicCondition: function (needsParens) {\n const entities = this.entities;\n const index = parserInput.i;\n let a;\n let b;\n let c;\n let op;\n\n function cond() {\n return this.addition() || entities.keyword() || entities.quoted() || entities.mixinLookup();\n }\n cond = cond.bind(this);\n\n a = cond();\n if (a) {\n if (parserInput.$char('>')) {\n if (parserInput.$char('=')) {\n op = '>=';\n } else {\n op = '>';\n }\n } else\n if (parserInput.$char('<')) {\n if (parserInput.$char('=')) {\n op = '<=';\n } else {\n op = '<';\n }\n } else\n if (parserInput.$char('=')) {\n if (parserInput.$char('>')) {\n op = '=>';\n } else if (parserInput.$char('<')) {\n op = '=<';\n } else {\n op = '=';\n }\n }\n if (op) {\n b = cond();\n if (b) {\n c = new(tree.Condition)(op, a, b, index, false);\n } else {\n error('expected expression');\n }\n } else {\n c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, false);\n }\n return c;\n }\n },\n\n //\n // An operand is anything that can be part of an operation,\n // such as a Color, or a Variable\n //\n operand: function () {\n const entities = this.entities;\n let negate;\n\n if (parserInput.peek(/^-[@\\$\\(]/)) {\n negate = parserInput.$char('-');\n }\n\n let o = this.sub() || entities.dimension() ||\n entities.color() || entities.variable() ||\n entities.property() || entities.call() ||\n entities.quoted(true) || entities.colorKeyword() ||\n entities.mixinLookup();\n\n if (negate) {\n o.parensInOp = true;\n o = new(tree.Negative)(o);\n }\n\n return o;\n },\n\n //\n // Expressions either represent mathematical operations,\n // or white-space delimited Entities.\n //\n // 1px solid black\n // @var * 2\n //\n expression: function () {\n const entities = [];\n let e;\n let delim;\n const index = parserInput.i;\n\n do {\n e = this.comment();\n if (e) {\n entities.push(e);\n continue;\n }\n e = this.addition() || this.entity();\n if (e) {\n entities.push(e);\n // operations do not allow keyword \"/\" dimension (e.g. small/20px) so we support that here\n if (!parserInput.peek(/^\\/[\\/*]/)) {\n delim = parserInput.$char('/');\n if (delim) {\n entities.push(new(tree.Anonymous)(delim, index));\n }\n }\n }\n } while (e);\n if (entities.length > 0) {\n return new(tree.Expression)(entities);\n }\n },\n property: function () {\n const name = parserInput.$re(/^(\\*?-?[_a-zA-Z0-9-]+)\\s*:/);\n if (name) {\n return name[1];\n }\n },\n ruleProperty: function () {\n let name = [];\n const index = [];\n let s;\n let k;\n\n parserInput.save();\n\n const simpleProperty = parserInput.$re(/^([_a-zA-Z0-9-]+)\\s*:/);\n if (simpleProperty) {\n name = [new(tree.Keyword)(simpleProperty[1])];\n parserInput.forget();\n return name;\n }\n\n function match(re) {\n const i = parserInput.i;\n const chunk = parserInput.$re(re);\n if (chunk) {\n index.push(i);\n return name.push(chunk[1]);\n }\n }\n\n match(/^(\\*?)/);\n while (true) {\n if (!match(/^((?:[\\w-]+)|(?:[@\\$]\\{[\\w-]+\\}))/)) {\n break;\n }\n }\n\n if ((name.length > 1) && match(/^((?:\\+_|\\+)?)\\s*:/)) {\n parserInput.forget();\n\n // at last, we have the complete match now. move forward,\n // convert name particles to tree objects and return:\n if (name[0] === '') {\n name.shift();\n index.shift();\n }\n for (k = 0; k < name.length; k++) {\n s = name[k];\n name[k] = (s.charAt(0) !== '@' && s.charAt(0) !== '$') ?\n new(tree.Keyword)(s) :\n (s.charAt(0) === '@' ?\n new(tree.Variable)(`@${s.slice(2, -1)}`, index[k], fileInfo) :\n new(tree.Property)(`$${s.slice(2, -1)}`, index[k], fileInfo));\n }\n return name;\n }\n parserInput.restore();\n }\n }\n };\n};\nParser.serializeVars = vars => {\n let s = '';\n\n for (const name in vars) {\n if (Object.hasOwnProperty.call(vars, name)) {\n const value = vars[name];\n s += `${((name[0] === '@') ? '' : '@') + name}: ${value}${(String(value).slice(-1) === ';') ? '' : ';'}`;\n }\n }\n\n return s;\n};\n\nexport default Parser;\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nlet colorFunctions;\n\nfunction clamp(val) {\n return Math.min(1, Math.max(0, val));\n}\nfunction hsla(origColor, hsl) {\n const color = colorFunctions.hsla(hsl.h, hsl.s, hsl.l, hsl.a);\n if (color) {\n if (origColor.value && \n /^(rgb|hsl)/.test(origColor.value)) {\n color.value = origColor.value;\n } else {\n color.value = 'rgb';\n }\n return color;\n }\n}\nfunction toHSL(color) {\n if (color.toHSL) {\n return color.toHSL();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction toHSV(color) {\n if (color.toHSV) {\n return color.toHSV();\n } else {\n throw new Error('Argument cannot be evaluated to a color');\n }\n}\n\nfunction number(n) {\n if (n instanceof Dimension) {\n return parseFloat(n.unit.is('%') ? n.value / 100 : n.value);\n } else if (typeof n === 'number') {\n return n;\n } else {\n throw {\n type: 'Argument',\n message: 'color functions take numbers as parameters'\n };\n }\n}\nfunction scaled(n, size) {\n if (n instanceof Dimension && n.unit.is('%')) {\n return parseFloat(n.value * size / 100);\n } else {\n return number(n);\n }\n}\ncolorFunctions = {\n rgb: function (r, g, b) {\n const color = colorFunctions.rgba(r, g, b, 1.0);\n if (color) {\n color.value = 'rgb';\n return color;\n }\n },\n rgba: function (r, g, b, a) {\n try {\n if (r instanceof Color) {\n if (g) {\n a = number(g);\n } else {\n a = r.alpha;\n }\n return new Color(r.rgb, a, 'rgba');\n }\n const rgb = [r, g, b].map(c => scaled(c, 255));\n a = number(a);\n return new Color(rgb, a, 'rgba');\n }\n catch (e) {}\n },\n hsl: function (h, s, l) {\n const color = colorFunctions.hsla(h, s, l, 1.0);\n if (color) {\n color.value = 'hsl';\n return color;\n }\n },\n hsla: function (h, s, l, a) {\n try {\n if (h instanceof Color) {\n if (s) {\n a = number(s);\n } else {\n a = h.alpha;\n }\n return new Color(h.rgb, a, 'hsla');\n }\n\n let m1;\n let m2;\n\n function hue(h) {\n h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);\n if (h * 6 < 1) {\n return m1 + (m2 - m1) * h * 6;\n }\n else if (h * 2 < 1) {\n return m2;\n }\n else if (h * 3 < 2) {\n return m1 + (m2 - m1) * (2 / 3 - h) * 6;\n }\n else {\n return m1;\n }\n }\n\n h = (number(h) % 360) / 360;\n s = clamp(number(s));l = clamp(number(l));a = clamp(number(a));\n\n m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;\n m1 = l * 2 - m2;\n\n const rgb = [\n hue(h + 1 / 3) * 255,\n hue(h) * 255,\n hue(h - 1 / 3) * 255\n ];\n a = number(a);\n return new Color(rgb, a, 'hsla');\n }\n catch (e) {}\n },\n\n hsv: function(h, s, v) {\n return colorFunctions.hsva(h, s, v, 1.0);\n },\n\n hsva: function(h, s, v, a) {\n h = ((number(h) % 360) / 360) * 360;\n s = number(s);v = number(v);a = number(a);\n\n let i;\n let f;\n i = Math.floor((h / 60) % 6);\n f = (h / 60) - i;\n\n const vs = [v,\n v * (1 - s),\n v * (1 - f * s),\n v * (1 - (1 - f) * s)];\n const perm = [[0, 3, 1],\n [2, 0, 1],\n [1, 0, 3],\n [1, 2, 0],\n [3, 1, 0],\n [0, 1, 2]];\n\n return colorFunctions.rgba(vs[perm[i][0]] * 255,\n vs[perm[i][1]] * 255,\n vs[perm[i][2]] * 255,\n a);\n },\n\n hue: function (color) {\n return new Dimension(toHSL(color).h);\n },\n saturation: function (color) {\n return new Dimension(toHSL(color).s * 100, '%');\n },\n lightness: function (color) {\n return new Dimension(toHSL(color).l * 100, '%');\n },\n hsvhue: function(color) {\n return new Dimension(toHSV(color).h);\n },\n hsvsaturation: function (color) {\n return new Dimension(toHSV(color).s * 100, '%');\n },\n hsvvalue: function (color) {\n return new Dimension(toHSV(color).v * 100, '%');\n },\n red: function (color) {\n return new Dimension(color.rgb[0]);\n },\n green: function (color) {\n return new Dimension(color.rgb[1]);\n },\n blue: function (color) {\n return new Dimension(color.rgb[2]);\n },\n alpha: function (color) {\n return new Dimension(toHSL(color).a);\n },\n luma: function (color) {\n return new Dimension(color.luma() * color.alpha * 100, '%');\n },\n luminance: function (color) {\n const luminance =\n (0.2126 * color.rgb[0] / 255) +\n (0.7152 * color.rgb[1] / 255) +\n (0.0722 * color.rgb[2] / 255);\n\n return new Dimension(luminance * color.alpha * 100, '%');\n },\n saturate: function (color, amount, method) {\n // filter: saturate(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s += hsl.s * amount.value / 100;\n }\n else {\n hsl.s += amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n desaturate: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.s -= hsl.s * amount.value / 100;\n }\n else {\n hsl.s -= amount.value / 100;\n }\n hsl.s = clamp(hsl.s);\n return hsla(color, hsl);\n },\n lighten: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l += hsl.l * amount.value / 100;\n }\n else {\n hsl.l += amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n darken: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.l -= hsl.l * amount.value / 100;\n }\n else {\n hsl.l -= amount.value / 100;\n }\n hsl.l = clamp(hsl.l);\n return hsla(color, hsl);\n },\n fadein: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a += hsl.a * amount.value / 100;\n }\n else {\n hsl.a += amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fadeout: function (color, amount, method) {\n const hsl = toHSL(color);\n\n if (typeof method !== 'undefined' && method.value === 'relative') {\n hsl.a -= hsl.a * amount.value / 100;\n }\n else {\n hsl.a -= amount.value / 100;\n }\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n fade: function (color, amount) {\n const hsl = toHSL(color);\n\n hsl.a = amount.value / 100;\n hsl.a = clamp(hsl.a);\n return hsla(color, hsl);\n },\n spin: function (color, amount) {\n const hsl = toHSL(color);\n const hue = (hsl.h + amount.value) % 360;\n\n hsl.h = hue < 0 ? 360 + hue : hue;\n\n return hsla(color, hsl);\n },\n //\n // Copyright (c) 2006-2009 Hampton Catlin, Natalie Weizenbaum, and Chris Eppstein\n // http://sass-lang.com\n //\n mix: function (color1, color2, weight) {\n if (!weight) {\n weight = new Dimension(50);\n }\n const p = weight.value / 100.0;\n const w = p * 2 - 1;\n const a = toHSL(color1).a - toHSL(color2).a;\n\n const w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;\n const w2 = 1 - w1;\n\n const rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,\n color1.rgb[1] * w1 + color2.rgb[1] * w2,\n color1.rgb[2] * w1 + color2.rgb[2] * w2];\n\n const alpha = color1.alpha * p + color2.alpha * (1 - p);\n\n return new Color(rgb, alpha);\n },\n greyscale: function (color) {\n return colorFunctions.desaturate(color, new Dimension(100));\n },\n contrast: function (color, dark, light, threshold) {\n // filter: contrast(3.2);\n // should be kept as is, so check for color\n if (!color.rgb) {\n return null;\n }\n if (typeof light === 'undefined') {\n light = colorFunctions.rgba(255, 255, 255, 1.0);\n }\n if (typeof dark === 'undefined') {\n dark = colorFunctions.rgba(0, 0, 0, 1.0);\n }\n // Figure out which is actually light and dark:\n if (dark.luma() > light.luma()) {\n const t = light;\n light = dark;\n dark = t;\n }\n if (typeof threshold === 'undefined') {\n threshold = 0.43;\n } else {\n threshold = number(threshold);\n }\n if (color.luma() < threshold) {\n return light;\n } else {\n return dark;\n }\n },\n // Changes made in 2.7.0 - Reverted in 3.0.0\n // contrast: function (color, color1, color2, threshold) {\n // // Return which of `color1` and `color2` has the greatest contrast with `color`\n // // according to the standard WCAG contrast ratio calculation.\n // // http://www.w3.org/TR/WCAG20/#contrast-ratiodef\n // // The threshold param is no longer used, in line with SASS.\n // // filter: contrast(3.2);\n // // should be kept as is, so check for color\n // if (!color.rgb) {\n // return null;\n // }\n // if (typeof color1 === 'undefined') {\n // color1 = colorFunctions.rgba(0, 0, 0, 1.0);\n // }\n // if (typeof color2 === 'undefined') {\n // color2 = colorFunctions.rgba(255, 255, 255, 1.0);\n // }\n // var contrast1, contrast2;\n // var luma = color.luma();\n // var luma1 = color1.luma();\n // var luma2 = color2.luma();\n // // Calculate contrast ratios for each color\n // if (luma > luma1) {\n // contrast1 = (luma + 0.05) / (luma1 + 0.05);\n // } else {\n // contrast1 = (luma1 + 0.05) / (luma + 0.05);\n // }\n // if (luma > luma2) {\n // contrast2 = (luma + 0.05) / (luma2 + 0.05);\n // } else {\n // contrast2 = (luma2 + 0.05) / (luma + 0.05);\n // }\n // if (contrast1 > contrast2) {\n // return color1;\n // } else {\n // return color2;\n // }\n // },\n argb: function (color) {\n return new Anonymous(color.toARGB());\n },\n color: function(c) {\n if ((c instanceof Quoted) &&\n (/^#([A-Fa-f0-9]{8}|[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3,4})$/i.test(c.value))) {\n const val = c.value.slice(1);\n return new Color(val, undefined, `#${val}`);\n }\n if ((c instanceof Color) || (c = Color.fromKeyword(c.value))) {\n c.value = undefined;\n return c;\n }\n throw {\n type: 'Argument',\n message: 'argument must be a color keyword or 3|4|6|8 digit hex e.g. #FFF'\n };\n },\n tint: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(255, 255, 255), color, amount);\n },\n shade: function(color, amount) {\n return colorFunctions.mix(colorFunctions.rgb(0, 0, 0), color, amount);\n }\n};\n\nexport default colorFunctions;\n","import Anonymous from '../tree/anonymous';\nimport Keyword from '../tree/keyword';\n\nfunction boolean(condition) {\n return condition ? Keyword.True : Keyword.False;\n}\n\nfunction If(condition, trueValue, falseValue) {\n return condition ? trueValue\n : (falseValue || new Anonymous);\n}\n\nexport default { boolean, 'if': If };\n","import Color from '../tree/color';\n\n// Color Blending\n// ref: http://www.w3.org/TR/compositing-1\n\nfunction colorBlend(mode, color1, color2) {\n const ab = color1.alpha; // result\n\n let // backdrop\n cb;\n\n const as = color2.alpha;\n\n let // source\n cs;\n\n let ar;\n let cr;\n const r = [];\n\n ar = as + ab * (1 - as);\n for (let i = 0; i < 3; i++) {\n cb = color1.rgb[i] / 255;\n cs = color2.rgb[i] / 255;\n cr = mode(cb, cs);\n if (ar) {\n cr = (as * cs + ab * (cb -\n as * (cb + cs - cr))) / ar;\n }\n r[i] = cr * 255;\n }\n\n return new Color(r, ar);\n}\n\nconst colorBlendModeFunctions = {\n multiply: function(cb, cs) {\n return cb * cs;\n },\n screen: function(cb, cs) {\n return cb + cs - cb * cs;\n },\n overlay: function(cb, cs) {\n cb *= 2;\n return (cb <= 1) ?\n colorBlendModeFunctions.multiply(cb, cs) :\n colorBlendModeFunctions.screen(cb - 1, cs);\n },\n softlight: function(cb, cs) {\n let d = 1;\n let e = cb;\n if (cs > 0.5) {\n e = 1;\n d = (cb > 0.25) ? Math.sqrt(cb)\n : ((16 * cb - 12) * cb + 4) * cb;\n }\n return cb - (1 - 2 * cs) * e * (d - cb);\n },\n hardlight: function(cb, cs) {\n return colorBlendModeFunctions.overlay(cs, cb);\n },\n difference: function(cb, cs) {\n return Math.abs(cb - cs);\n },\n exclusion: function(cb, cs) {\n return cb + cs - 2 * cb * cs;\n },\n\n // non-w3c functions:\n average: function(cb, cs) {\n return (cb + cs) / 2;\n },\n negation: function(cb, cs) {\n return 1 - Math.abs(cb + cs - 1);\n }\n};\n\nfor (const f in colorBlendModeFunctions) {\n if (colorBlendModeFunctions.hasOwnProperty(f)) {\n colorBlend[f] = colorBlend.bind(null, colorBlendModeFunctions[f]);\n }\n}\n\nexport default colorBlend;\n","import Comment from '../tree/comment';\nimport Dimension from '../tree/dimension';\nimport Declaration from '../tree/declaration';\nimport Expression from '../tree/expression';\nimport Ruleset from '../tree/ruleset';\nimport Selector from '../tree/selector';\nimport Element from '../tree/element';\nimport Quote from '../tree/quoted';\n\nconst getItemsFromNode = node => {\n // handle non-array values as an array of length 1\n // return 'undefined' if index is invalid\n const items = Array.isArray(node.value) ?\n node.value : Array(node);\n\n return items;\n};\n\nexport default {\n _SELF: function(n) {\n return n;\n },\n extract: function(values, index) {\n index = index.value - 1; // (1-based index)\n\n return getItemsFromNode(values)[index];\n },\n length: function(values) {\n return new Dimension(getItemsFromNode(values).length);\n },\n /**\n * Creates a Less list of incremental values.\n * Modeled after Lodash's range function, also exists natively in PHP\n * \n * @param {Dimension} [start=1]\n * @param {Dimension} end - e.g. 10 or 10px - unit is added to output\n * @param {Dimension} [step=1] \n */\n range: function(start, end, step) {\n let from;\n let to;\n let stepValue = 1;\n const list = [];\n if (end) {\n to = end;\n from = start.value;\n if (step) {\n stepValue = step.value;\n }\n }\n else {\n from = 1;\n to = start;\n }\n\n for (let i = from; i <= to.value; i += stepValue) {\n list.push(new Dimension(i, to.unit));\n }\n\n return new Expression(list);\n },\n each: function(list, rs) {\n const rules = [];\n let newRules;\n let iterator;\n\n if (list.value && !(list instanceof Quote)) {\n if (Array.isArray(list.value)) {\n iterator = list.value;\n } else {\n iterator = [list.value];\n }\n } else if (list.ruleset) {\n iterator = list.ruleset.rules;\n } else if (list.rules) {\n iterator = list.rules;\n } else if (Array.isArray(list)) {\n iterator = list;\n } else {\n iterator = [list];\n }\n\n let valueName = '@value';\n let keyName = '@key';\n let indexName = '@index';\n\n if (rs.params) {\n valueName = rs.params[0] && rs.params[0].name;\n keyName = rs.params[1] && rs.params[1].name;\n indexName = rs.params[2] && rs.params[2].name;\n rs = rs.rules;\n } else {\n rs = rs.ruleset;\n }\n\n for (let i = 0; i < iterator.length; i++) {\n let key;\n let value;\n const item = iterator[i];\n if (item instanceof Declaration) {\n key = typeof item.name === 'string' ? item.name : item.name[0].value;\n value = item.value;\n } else {\n key = new Dimension(i + 1);\n value = item;\n }\n\n if (item instanceof Comment) {\n continue;\n }\n\n newRules = rs.rules.slice(0);\n if (valueName) {\n newRules.push(new Declaration(valueName,\n value,\n false, false, this.index, this.currentFileInfo));\n }\n if (indexName) {\n newRules.push(new Declaration(indexName,\n new Dimension(i + 1),\n false, false, this.index, this.currentFileInfo));\n }\n if (keyName) {\n newRules.push(new Declaration(keyName,\n key,\n false, false, this.index, this.currentFileInfo));\n }\n\n rules.push(new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n newRules,\n rs.strictImports,\n rs.visibilityInfo()\n ));\n }\n\n return new Ruleset([ new(Selector)([ new Element(\"\", '&') ]) ],\n rules,\n rs.strictImports,\n rs.visibilityInfo()\n ).eval(this.context);\n }\n};\n","import Dimension from '../tree/dimension';\n\nconst MathHelper = (fn, unit, n) => {\n if (!(n instanceof Dimension)) {\n throw { type: 'Argument', message: 'argument must be a number' };\n }\n if (unit == null) {\n unit = n.unit;\n } else {\n n = n.unify();\n }\n return new Dimension(fn(parseFloat(n.value)), unit);\n};\n\nexport default MathHelper;","import mathHelper from './math-helper.js';\n\nconst mathFunctions = {\n // name, unit\n ceil: null,\n floor: null,\n sqrt: null,\n abs: null,\n tan: '',\n sin: '',\n cos: '',\n atan: 'rad',\n asin: 'rad',\n acos: 'rad'\n};\n\nfor (const f in mathFunctions) {\n if (mathFunctions.hasOwnProperty(f)) {\n mathFunctions[f] = mathHelper.bind(null, Math[f], mathFunctions[f]);\n }\n}\n\nmathFunctions.round = (n, f) => {\n const fraction = typeof f === 'undefined' ? 0 : f.value;\n return mathHelper(num => num.toFixed(fraction), null, n);\n};\n\nexport default mathFunctions;\n","import Dimension from '../tree/dimension';\nimport Anonymous from '../tree/anonymous';\nimport mathHelper from './math-helper.js';\n\nconst minMax = function (isMin, args) {\n args = Array.prototype.slice.call(args);\n switch (args.length) {\n case 0: throw { type: 'Argument', message: 'one or more arguments required' };\n }\n let i; // key is the unit.toString() for unified Dimension values,\n let j;\n let current;\n let currentUnified;\n let referenceUnified;\n let unit;\n let unitStatic;\n let unitClone;\n\n const // elems only contains original argument values.\n order = [];\n\n const values = {};\n // value is the index into the order array.\n for (i = 0; i < args.length; i++) {\n current = args[i];\n if (!(current instanceof Dimension)) {\n if (Array.isArray(args[i].value)) {\n Array.prototype.push.apply(args, Array.prototype.slice.call(args[i].value));\n }\n continue;\n }\n currentUnified = current.unit.toString() === '' && unitClone !== undefined ? new Dimension(current.value, unitClone).unify() : current.unify();\n unit = currentUnified.unit.toString() === '' && unitStatic !== undefined ? unitStatic : currentUnified.unit.toString();\n unitStatic = unit !== '' && unitStatic === undefined || unit !== '' && order[0].unify().unit.toString() === '' ? unit : unitStatic;\n unitClone = unit !== '' && unitClone === undefined ? current.unit.toString() : unitClone;\n j = values[''] !== undefined && unit !== '' && unit === unitStatic ? values[''] : values[unit];\n if (j === undefined) {\n if (unitStatic !== undefined && unit !== unitStatic) {\n throw { type: 'Argument', message: 'incompatible types' };\n }\n values[unit] = order.length;\n order.push(current);\n continue;\n }\n referenceUnified = order[j].unit.toString() === '' && unitClone !== undefined ? new Dimension(order[j].value, unitClone).unify() : order[j].unify();\n if ( isMin && currentUnified.value < referenceUnified.value ||\n !isMin && currentUnified.value > referenceUnified.value) {\n order[j] = current;\n }\n }\n if (order.length == 1) {\n return order[0];\n }\n args = order.map(function (a) { return a.toCSS(this.context); }).join(this.context.compress ? ',' : ', ');\n return new Anonymous(`${isMin ? 'min' : 'max'}(${args})`);\n};\n\nexport default {\n min: function(...args) {\n return minMax(true, args);\n },\n max: function(...args) {\n return minMax(false, args);\n },\n convert: function (val, unit) {\n return val.convertTo(unit.value);\n },\n pi: function () {\n return new Dimension(Math.PI);\n },\n mod: function(a, b) {\n return new Dimension(a.value % b.value, a.unit);\n },\n pow: function(x, y) {\n if (typeof x === 'number' && typeof y === 'number') {\n x = new Dimension(x);\n y = new Dimension(y);\n } else if (!(x instanceof Dimension) || !(y instanceof Dimension)) {\n throw { type: 'Argument', message: 'arguments must be numbers' };\n }\n\n return new Dimension(Math.pow(x.value, y.value), x.unit);\n },\n percentage: function (n) {\n const result = mathHelper(num => num * 100, '%', n);\n\n return result;\n }\n};\n","/**\n * Plugin Manager\n */\nclass PluginManager {\n constructor(less) {\n this.less = less;\n this.visitors = [];\n this.preProcessors = [];\n this.postProcessors = [];\n this.installedPlugins = [];\n this.fileManagers = [];\n this.iterator = -1;\n this.pluginCache = {};\n this.Loader = new less.PluginLoader(less);\n }\n\n /**\n * Adds all the plugins in the array\n * @param {Array} plugins\n */\n addPlugins(plugins) {\n if (plugins) {\n for (let i = 0; i < plugins.length; i++) {\n this.addPlugin(plugins[i]);\n }\n }\n }\n\n /**\n *\n * @param plugin\n * @param {String} filename\n */\n addPlugin(plugin, filename, functionRegistry) {\n this.installedPlugins.push(plugin);\n if (filename) {\n this.pluginCache[filename] = plugin;\n }\n if (plugin.install) {\n plugin.install(this.less, this, functionRegistry || this.less.functions.functionRegistry);\n }\n }\n\n /**\n *\n * @param filename\n */\n get(filename) {\n return this.pluginCache[filename];\n }\n\n /**\n * Adds a visitor. The visitor object has options on itself to determine\n * when it should run.\n * @param visitor\n */\n addVisitor(visitor) {\n this.visitors.push(visitor);\n }\n\n /**\n * Adds a pre processor object\n * @param {object} preProcessor\n * @param {number} priority - guidelines 1 = before import, 1000 = import, 2000 = after import\n */\n addPreProcessor(preProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.preProcessors.length; indexToInsertAt++) {\n if (this.preProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.preProcessors.splice(indexToInsertAt, 0, {preProcessor, priority});\n }\n\n /**\n * Adds a post processor object\n * @param {object} postProcessor\n * @param {number} priority - guidelines 1 = before compression, 1000 = compression, 2000 = after compression\n */\n addPostProcessor(postProcessor, priority) {\n let indexToInsertAt;\n for (indexToInsertAt = 0; indexToInsertAt < this.postProcessors.length; indexToInsertAt++) {\n if (this.postProcessors[indexToInsertAt].priority >= priority) {\n break;\n }\n }\n this.postProcessors.splice(indexToInsertAt, 0, {postProcessor, priority});\n }\n\n /**\n *\n * @param manager\n */\n addFileManager(manager) {\n this.fileManagers.push(manager);\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPreProcessors() {\n const preProcessors = [];\n for (let i = 0; i < this.preProcessors.length; i++) {\n preProcessors.push(this.preProcessors[i].preProcessor);\n }\n return preProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getPostProcessors() {\n const postProcessors = [];\n for (let i = 0; i < this.postProcessors.length; i++) {\n postProcessors.push(this.postProcessors[i].postProcessor);\n }\n return postProcessors;\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getVisitors() {\n return this.visitors;\n }\n\n visitor() {\n const self = this;\n return {\n first: function() {\n self.iterator = -1;\n return self.visitors[self.iterator];\n },\n get: function() {\n self.iterator += 1;\n return self.visitors[self.iterator];\n }\n };\n }\n\n /**\n *\n * @returns {Array}\n * @private\n */\n getFileManagers() {\n return this.fileManagers;\n }\n}\n\nlet pm;\n\nfunction PluginManagerFactory(less, newFactory) {\n if (newFactory || !pm) {\n pm = new PluginManager(less);\n }\n return pm;\n};\n\n//\nexport default PluginManagerFactory;\n","import Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport Quote from '../tree/quoted';\nimport JavaScript from '../tree/javascript';\n\nexport default {\n e: function (str) {\n return new Quote('\"', str instanceof JavaScript ? str.evaluated : str.value, true);\n },\n escape: function (str) {\n return new Anonymous(\n encodeURI(str.value).replace(/=/g, '%3D').replace(/:/g, '%3A').replace(/#/g, '%23').replace(/;/g, '%3B')\n .replace(/\\(/g, '%28').replace(/\\)/g, '%29'));\n },\n replace: function (string, pattern, replacement, flags) {\n let result = string.value;\n replacement = (replacement.type === 'Quoted') ?\n replacement.value : replacement.toCSS();\n result = result.replace(new RegExp(pattern.value, flags ? flags.value : ''), replacement);\n return new Quoted(string.quote || '', result, string.escaped);\n },\n '%': function (string /* arg, arg, ... */) {\n const args = Array.prototype.slice.call(arguments, 1);\n let result = string.value;\n\n for (let i = 0; i < args.length; i++) {\n /* jshint loopfunc:true */\n result = result.replace(/%[sda]/i, token => {\n const value = ((args[i].type === 'Quoted') &&\n token.match(/s/i)) ? args[i].value : args[i].toCSS();\n return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;\n });\n }\n result = result.replace(/%%/g, '%');\n return new Quoted(string.quote || '', result, string.escaped);\n }\n};\n","import Keyword from '../tree/keyword';\nimport DetachedRuleset from '../tree/detached-ruleset';\nimport Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Quoted from '../tree/quoted';\nimport Anonymous from '../tree/anonymous';\nimport URL from '../tree/url';\nimport Operation from '../tree/operation';\n\nconst isa = (n, Type) => (n instanceof Type) ? Keyword.True : Keyword.False;\nconst isunit = (n, unit) => {\n if (unit === undefined) {\n throw { type: 'Argument', message: 'missing the required second argument to isunit.' };\n }\n unit = typeof unit.value === 'string' ? unit.value : unit;\n if (typeof unit !== 'string') {\n throw { type: 'Argument', message: 'Second argument to isunit should be a unit or a string.' };\n }\n return (n instanceof Dimension) && n.unit.is(unit) ? Keyword.True : Keyword.False;\n};\n\nexport default {\n isruleset: function (n) {\n return isa(n, DetachedRuleset);\n },\n iscolor: function (n) {\n return isa(n, Color);\n },\n isnumber: function (n) {\n return isa(n, Dimension);\n },\n isstring: function (n) {\n return isa(n, Quoted);\n },\n iskeyword: function (n) {\n return isa(n, Keyword);\n },\n isurl: function (n) {\n return isa(n, URL);\n },\n ispixel: function (n) {\n return isunit(n, 'px');\n },\n ispercentage: function (n) {\n return isunit(n, '%');\n },\n isem: function (n) {\n return isunit(n, 'em');\n },\n isunit,\n unit: function (val, unit) {\n if (!(val instanceof Dimension)) {\n throw { type: 'Argument',\n message: `the first argument to unit must be a number${val instanceof Operation ? '. Have you forgotten parenthesis?' : ''}` };\n }\n if (unit) {\n if (unit instanceof Keyword) {\n unit = unit.value;\n } else {\n unit = unit.toCSS();\n }\n } else {\n unit = '';\n }\n return new Dimension(val.value, unit);\n },\n 'get-unit': function (n) {\n return new Anonymous(n.unit);\n }\n};\n","import functionRegistry from './function-registry';\nimport functionCaller from './function-caller';\n\nimport boolean from './boolean';\nimport defaultFunc from './default';\nimport color from './color';\nimport colorBlending from './color-blending';\nimport dataUri from './data-uri';\nimport list from './list';\nimport math from './math';\nimport number from './number';\nimport string from './string';\nimport svg from './svg';\nimport types from './types';\n\nexport default environment => {\n const functions = { functionRegistry, functionCaller };\n\n // register functions\n functionRegistry.addMultiple(boolean);\n functionRegistry.add('default', defaultFunc.eval.bind(defaultFunc));\n functionRegistry.addMultiple(color);\n functionRegistry.addMultiple(colorBlending);\n functionRegistry.addMultiple(dataUri(environment));\n functionRegistry.addMultiple(list);\n functionRegistry.addMultiple(math);\n functionRegistry.addMultiple(number);\n functionRegistry.addMultiple(string);\n functionRegistry.addMultiple(svg(environment));\n functionRegistry.addMultiple(types);\n\n return functions;\n};\n","import Quoted from '../tree/quoted';\nimport URL from '../tree/url';\nimport * as utils from '../utils';\nimport logger from '../logger';\n\nexport default environment => {\n \n const fallback = (functionThis, node) => new URL(node, functionThis.index, functionThis.currentFileInfo).eval(functionThis.context); \n\n return { 'data-uri': function(mimetypeNode, filePathNode) {\n\n if (!filePathNode) {\n filePathNode = mimetypeNode;\n mimetypeNode = null;\n }\n\n let mimetype = mimetypeNode && mimetypeNode.value;\n let filePath = filePathNode.value;\n const currentFileInfo = this.currentFileInfo;\n const currentDirectory = currentFileInfo.rewriteUrls ?\n currentFileInfo.currentDirectory : currentFileInfo.entryPath;\n\n const fragmentStart = filePath.indexOf('#');\n let fragment = '';\n if (fragmentStart !== -1) {\n fragment = filePath.slice(fragmentStart);\n filePath = filePath.slice(0, fragmentStart);\n }\n const context = utils.clone(this.context);\n context.rawBuffer = true;\n\n const fileManager = environment.getFileManager(filePath, currentDirectory, context, environment, true);\n\n if (!fileManager) {\n return fallback(this, filePathNode);\n }\n\n let useBase64 = false;\n\n // detect the mimetype if not given\n if (!mimetypeNode) {\n\n mimetype = environment.mimeLookup(filePath);\n\n if (mimetype === 'image/svg+xml') {\n useBase64 = false;\n } else {\n // use base 64 unless it's an ASCII or UTF-8 format\n const charset = environment.charsetLookup(mimetype);\n useBase64 = ['US-ASCII', 'UTF-8'].indexOf(charset) < 0;\n }\n if (useBase64) { mimetype += ';base64'; }\n }\n else {\n useBase64 = /;base64$/.test(mimetype);\n }\n\n const fileSync = fileManager.loadFileSync(filePath, currentDirectory, context, environment);\n if (!fileSync.contents) {\n logger.warn(`Skipped data-uri embedding of ${filePath} because file not found`);\n return fallback(this, filePathNode || mimetypeNode);\n }\n let buf = fileSync.contents;\n if (useBase64 && !environment.encodeBase64) {\n return fallback(this, filePathNode);\n }\n\n buf = useBase64 ? environment.encodeBase64(buf) : encodeURIComponent(buf);\n\n const uri = `data:${mimetype},${buf}${fragment}`;\n\n return new URL(new Quoted(`\"${uri}\"`, uri, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import Dimension from '../tree/dimension';\nimport Color from '../tree/color';\nimport Expression from '../tree/expression';\nimport Quoted from '../tree/quoted';\nimport URL from '../tree/url';\n\nexport default environment => {\n return { 'svg-gradient': function(direction) {\n let stops;\n let gradientDirectionSvg;\n let gradientType = 'linear';\n let rectangleDimension = 'x=\"0\" y=\"0\" width=\"1\" height=\"1\"';\n const renderEnv = {compress: false};\n let returner;\n const directionValue = direction.toCSS(renderEnv);\n let i;\n let color;\n let position;\n let positionValue;\n let alpha;\n\n function throwArgumentDescriptor() {\n throw { type: 'Argument',\n message: 'svg-gradient expects direction, start_color [start_position], [color position,]...,' +\n ' end_color [end_position] or direction, color list' };\n }\n\n if (arguments.length == 2) {\n if (arguments[1].value.length < 2) {\n throwArgumentDescriptor();\n }\n stops = arguments[1].value;\n } else if (arguments.length < 3) {\n throwArgumentDescriptor();\n } else {\n stops = Array.prototype.slice.call(arguments, 1);\n }\n\n switch (directionValue) {\n case 'to bottom':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"0%\" y2=\"100%\"';\n break;\n case 'to right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'to bottom right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"0%\" x2=\"100%\" y2=\"100%\"';\n break;\n case 'to top right':\n gradientDirectionSvg = 'x1=\"0%\" y1=\"100%\" x2=\"100%\" y2=\"0%\"';\n break;\n case 'ellipse':\n case 'ellipse at center':\n gradientType = 'radial';\n gradientDirectionSvg = 'cx=\"50%\" cy=\"50%\" r=\"75%\"';\n rectangleDimension = 'x=\"-50\" y=\"-50\" width=\"101\" height=\"101\"';\n break;\n default:\n throw { type: 'Argument', message: 'svg-gradient direction must be \\'to bottom\\', \\'to right\\',' +\n ' \\'to bottom right\\', \\'to top right\\' or \\'ellipse at center\\'' };\n }\n returner = `<${gradientType}Gradient id=\"g\" ${gradientDirectionSvg}>`;\n\n for (i = 0; i < stops.length; i += 1) {\n if (stops[i] instanceof Expression) {\n color = stops[i].value[0];\n position = stops[i].value[1];\n } else {\n color = stops[i];\n position = undefined;\n }\n\n if (!(color instanceof Color) || (!((i === 0 || i + 1 === stops.length) && position === undefined) && !(position instanceof Dimension))) {\n throwArgumentDescriptor();\n }\n positionValue = position ? position.toCSS(renderEnv) : i === 0 ? '0%' : '100%';\n alpha = color.alpha;\n returner += ``;\n }\n returner += ``;\n\n returner = encodeURIComponent(returner);\n\n returner = `data:image/svg+xml,${returner}`;\n return new URL(new Quoted(`'${returner}'`, returner, false, this.index, this.currentFileInfo), this.index, this.currentFileInfo);\n }};\n};\n","import contexts from './contexts';\nimport visitor from './visitors';\nimport tree from './tree';\n\nexport default (root, options = {}) => {\n let evaldRoot;\n let variables = options.variables;\n const evalEnv = new contexts.Eval(options);\n\n //\n // Allows setting variables with a hash, so:\n //\n // `{ color: new tree.Color('#f01') }` will become:\n //\n // new tree.Declaration('@color',\n // new tree.Value([\n // new tree.Expression([\n // new tree.Color('#f01')\n // ])\n // ])\n // )\n //\n if (typeof variables === 'object' && !Array.isArray(variables)) {\n variables = Object.keys(variables).map(k => {\n let value = variables[k];\n\n if (!(value instanceof tree.Value)) {\n if (!(value instanceof tree.Expression)) {\n value = new tree.Expression([value]);\n }\n value = new tree.Value([value]);\n }\n return new tree.Declaration(`@${k}`, value, false, null, 0);\n });\n evalEnv.frames = [new tree.Ruleset(null, variables)];\n }\n\n const visitors = [\n new visitor.JoinSelectorVisitor(),\n new visitor.MarkVisibleSelectorsVisitor(true),\n new visitor.ExtendVisitor(),\n new visitor.ToCSSVisitor({compress: Boolean(options.compress)})\n ];\n\n const preEvalVisitors = [];\n let v;\n let visitorIterator;\n\n /**\n * first() / get() allows visitors to be added while visiting\n * \n * @todo Add scoping for visitors just like functions for @plugin; right now they're global\n */\n if (options.pluginManager) {\n visitorIterator = options.pluginManager.visitor();\n for (var i = 0; i < 2; i++) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (v.isPreEvalVisitor) {\n if (i === 0 || preEvalVisitors.indexOf(v) === -1) {\n preEvalVisitors.push(v);\n v.run(root);\n }\n }\n else {\n if (i === 0 || visitors.indexOf(v) === -1) {\n if (v.isPreVisitor) {\n visitors.unshift(v);\n }\n else {\n visitors.push(v);\n }\n }\n }\n }\n }\n }\n\n evaldRoot = root.eval(evalEnv);\n\n for (var i = 0; i < visitors.length; i++) {\n visitors[i].run(evaldRoot);\n }\n\n // Run any remaining visitors added after eval pass\n if (options.pluginManager) {\n visitorIterator.first();\n while ((v = visitorIterator.get())) {\n if (visitors.indexOf(v) === -1 && preEvalVisitors.indexOf(v) === -1) {\n v.run(evaldRoot);\n }\n }\n }\n\n return evaldRoot;\n};\n","/* global window, XMLHttpRequest */\n\nimport AbstractFileManager from '../less/environment/abstract-file-manager.js';\n\nlet options;\nlet logger;\nlet fileCache = {};\n\n// TODOS - move log somewhere. pathDiff and doing something similar in node. use pathDiff in the other browser file for the initial load\nclass FileManager extends AbstractFileManager {\n alwaysMakePathsAbsolute() {\n return true;\n }\n\n join(basePath, laterPath) {\n if (!basePath) {\n return laterPath;\n }\n return this.extractUrlParts(laterPath, basePath).path;\n }\n\n doXHR(url, type, callback, errback) {\n const xhr = new XMLHttpRequest();\n const async = options.isFileProtocol ? options.fileAsync : true;\n\n if (typeof xhr.overrideMimeType === 'function') {\n xhr.overrideMimeType('text/css');\n }\n logger.debug(`XHR: Getting '${url}'`);\n xhr.open('GET', url, async);\n xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');\n xhr.send(null);\n\n function handleResponse(xhr, callback, errback) {\n if (xhr.status >= 200 && xhr.status < 300) {\n callback(xhr.responseText,\n xhr.getResponseHeader('Last-Modified'));\n } else if (typeof errback === 'function') {\n errback(xhr.status, url);\n }\n }\n\n if (options.isFileProtocol && !options.fileAsync) {\n if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {\n callback(xhr.responseText);\n } else {\n errback(xhr.status, url);\n }\n } else if (async) {\n xhr.onreadystatechange = () => {\n if (xhr.readyState == 4) {\n handleResponse(xhr, callback, errback);\n }\n };\n } else {\n handleResponse(xhr, callback, errback);\n }\n }\n\n supports() {\n return true;\n }\n\n clearFileCache() {\n fileCache = {};\n }\n\n loadFile(filename, currentDirectory, options, environment) {\n // TODO: Add prefix support like less-node?\n // What about multiple paths?\n\n if (currentDirectory && !this.isPathAbsolute(filename)) {\n filename = currentDirectory + filename;\n }\n\n filename = options.ext ? this.tryAppendExtension(filename, options.ext) : filename;\n\n options = options || {};\n\n // sheet may be set to the stylesheet for the initial load or a collection of properties including\n // some context variables for imports\n const hrefParts = this.extractUrlParts(filename, window.location.href);\n const href = hrefParts.url;\n const self = this;\n \n return new Promise((resolve, reject) => {\n if (options.useFileCache && fileCache[href]) {\n try {\n const lessText = fileCache[href];\n return resolve({ contents: lessText, filename: href, webInfo: { lastModified: new Date() }});\n } catch (e) {\n return reject({ filename: href, message: `Error loading file ${href} error was ${e.message}` });\n }\n }\n\n self.doXHR(href, options.mime, function doXHRCallback(data, lastModified) {\n // per file cache\n fileCache[href] = data;\n\n // Use remote copy (re-parse)\n resolve({ contents: data, filename: href, webInfo: { lastModified }});\n }, function doXHRError(status, url) {\n reject({ type: 'File', message: `'${url}' wasn't found (${status})`, href });\n });\n });\n }\n}\n\nexport default (opts, log) => {\n options = opts;\n logger = log;\n return FileManager;\n}\n","import data from './data';\nimport tree from './tree';\nimport Environment from './environment/environment';\nimport AbstractFileManager from './environment/abstract-file-manager';\nimport AbstractPluginLoader from './environment/abstract-plugin-loader';\nimport visitors from './visitors';\nimport Parser from './parser/parser';\nimport Functions from './functions';\nimport contexts from './contexts';\nimport sourceMapOutput from './source-map-output';\nimport sourceMapBuilder from './source-map-builder';\nimport parseTree from './parse-tree';\nimport importManager from './import-manager';\nimport Render from './render';\nimport Parse from './parse';\nimport LessError from './less-error';\nimport transformTree from './transform-tree';\nimport * as utils from './utils';\nimport PluginManager from './plugin-manager';\nimport logger from './logger';\n\nexport default (environment, fileManagers) => {\n /**\n * @todo\n * This original code could be improved quite a bit.\n * Many classes / modules currently add side-effects / mutations to passed in objects,\n * which makes it hard to refactor and reason about. \n */\n environment = new Environment(environment, fileManagers);\n\n const SourceMapOutput = sourceMapOutput(environment);\n const SourceMapBuilder = sourceMapBuilder(SourceMapOutput, environment);\n const ParseTree = parseTree(SourceMapBuilder);\n const ImportManager = importManager(environment);\n const render = Render(environment, ParseTree, ImportManager);\n const parse = Parse(environment, ParseTree, ImportManager);\n const functions = Functions(environment);\n\n /**\n * @todo\n * This root properties / methods need to be organized.\n * It's not clear what should / must be public and why.\n */\n const initial = {\n version: [3, 10, 0],\n data,\n tree,\n Environment,\n AbstractFileManager,\n AbstractPluginLoader,\n environment,\n visitors,\n Parser,\n functions,\n contexts,\n SourceMapOutput,\n SourceMapBuilder,\n ParseTree,\n ImportManager,\n render,\n parse,\n LessError,\n transformTree,\n utils,\n PluginManager,\n logger\n };\n\n // Create a public API\n const ctor = t => function (...args) {\n return new t(...args);\n };\n\n let t;\n const api = Object.create(initial);\n for (const n in initial.tree) {\n /* eslint guard-for-in: 0 */\n t = initial.tree[n];\n if (typeof t === 'function') {\n api[n.toLowerCase()] = ctor(t);\n }\n else {\n api[n] = Object.create(null);\n for (const o in t) {\n /* eslint guard-for-in: 0 */\n api[n][o.toLowerCase()] = ctor(t[o]);\n }\n }\n }\n\n return api;\n};\n","export default environment => {\n class SourceMapOutput {\n constructor(options) {\n this._css = [];\n this._rootNode = options.rootNode;\n this._contentsMap = options.contentsMap;\n this._contentsIgnoredCharsMap = options.contentsIgnoredCharsMap;\n if (options.sourceMapFilename) {\n this._sourceMapFilename = options.sourceMapFilename.replace(/\\\\/g, '/');\n }\n this._outputFilename = options.outputFilename;\n this.sourceMapURL = options.sourceMapURL;\n if (options.sourceMapBasepath) {\n this._sourceMapBasepath = options.sourceMapBasepath.replace(/\\\\/g, '/');\n }\n if (options.sourceMapRootpath) {\n this._sourceMapRootpath = options.sourceMapRootpath.replace(/\\\\/g, '/');\n if (this._sourceMapRootpath.charAt(this._sourceMapRootpath.length - 1) !== '/') {\n this._sourceMapRootpath += '/';\n }\n } else {\n this._sourceMapRootpath = '';\n }\n this._outputSourceFiles = options.outputSourceFiles;\n this._sourceMapGeneratorConstructor = environment.getSourceMapGenerator();\n\n this._lineNumber = 0;\n this._column = 0;\n }\n\n removeBasepath(path) {\n if (this._sourceMapBasepath && path.indexOf(this._sourceMapBasepath) === 0) {\n path = path.substring(this._sourceMapBasepath.length);\n if (path.charAt(0) === '\\\\' || path.charAt(0) === '/') {\n path = path.substring(1);\n }\n }\n\n return path;\n }\n\n normalizeFilename(filename) {\n filename = filename.replace(/\\\\/g, '/');\n filename = this.removeBasepath(filename);\n return (this._sourceMapRootpath || '') + filename;\n }\n\n add(chunk, fileInfo, index, mapLines) {\n // ignore adding empty strings\n if (!chunk) {\n return;\n }\n\n let lines;\n let sourceLines;\n let columns;\n let sourceColumns;\n let i;\n\n if (fileInfo && fileInfo.filename) {\n let inputSource = this._contentsMap[fileInfo.filename];\n\n // remove vars/banner added to the top of the file\n if (this._contentsIgnoredCharsMap[fileInfo.filename]) {\n // adjust the index\n index -= this._contentsIgnoredCharsMap[fileInfo.filename];\n if (index < 0) { index = 0; }\n // adjust the source\n inputSource = inputSource.slice(this._contentsIgnoredCharsMap[fileInfo.filename]);\n }\n\n // ignore empty content\n if (inputSource === undefined) {\n return;\n }\n\n inputSource = inputSource.substring(0, index);\n sourceLines = inputSource.split('\\n');\n sourceColumns = sourceLines[sourceLines.length - 1];\n }\n\n lines = chunk.split('\\n');\n columns = lines[lines.length - 1];\n\n if (fileInfo && fileInfo.filename) {\n if (!mapLines) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + 1, column: this._column},\n original: { line: sourceLines.length, column: sourceColumns.length},\n source: this.normalizeFilename(fileInfo.filename)});\n } else {\n for (i = 0; i < lines.length; i++) {\n this._sourceMapGenerator.addMapping({ generated: { line: this._lineNumber + i + 1, column: i === 0 ? this._column : 0},\n original: { line: sourceLines.length + i, column: i === 0 ? sourceColumns.length : 0},\n source: this.normalizeFilename(fileInfo.filename)});\n }\n }\n }\n\n if (lines.length === 1) {\n this._column += columns.length;\n } else {\n this._lineNumber += lines.length - 1;\n this._column = columns.length;\n }\n\n this._css.push(chunk);\n }\n\n isEmpty() {\n return this._css.length === 0;\n }\n\n toCSS(context) {\n this._sourceMapGenerator = new this._sourceMapGeneratorConstructor({ file: this._outputFilename, sourceRoot: null });\n\n if (this._outputSourceFiles) {\n for (const filename in this._contentsMap) {\n if (this._contentsMap.hasOwnProperty(filename)) {\n let source = this._contentsMap[filename];\n if (this._contentsIgnoredCharsMap[filename]) {\n source = source.slice(this._contentsIgnoredCharsMap[filename]);\n }\n this._sourceMapGenerator.setSourceContent(this.normalizeFilename(filename), source);\n }\n }\n }\n\n this._rootNode.genCSS(context, this);\n\n if (this._css.length > 0) {\n let sourceMapURL;\n const sourceMapContent = JSON.stringify(this._sourceMapGenerator.toJSON());\n\n if (this.sourceMapURL) {\n sourceMapURL = this.sourceMapURL;\n } else if (this._sourceMapFilename) {\n sourceMapURL = this._sourceMapFilename;\n }\n this.sourceMapURL = sourceMapURL;\n\n this.sourceMap = sourceMapContent;\n }\n\n return this._css.join('');\n }\n }\n\n return SourceMapOutput;\n};\n","export default (SourceMapOutput, environment) => {\n class SourceMapBuilder {\n constructor(options) {\n this.options = options;\n }\n\n toCSS(rootNode, options, imports) {\n const sourceMapOutput = new SourceMapOutput(\n {\n contentsIgnoredCharsMap: imports.contentsIgnoredChars,\n rootNode,\n contentsMap: imports.contents,\n sourceMapFilename: this.options.sourceMapFilename,\n sourceMapURL: this.options.sourceMapURL,\n outputFilename: this.options.sourceMapOutputFilename,\n sourceMapBasepath: this.options.sourceMapBasepath,\n sourceMapRootpath: this.options.sourceMapRootpath,\n outputSourceFiles: this.options.outputSourceFiles,\n sourceMapGenerator: this.options.sourceMapGenerator,\n sourceMapFileInline: this.options.sourceMapFileInline\n });\n\n const css = sourceMapOutput.toCSS(options);\n this.sourceMap = sourceMapOutput.sourceMap;\n this.sourceMapURL = sourceMapOutput.sourceMapURL;\n if (this.options.sourceMapInputFilename) {\n this.sourceMapInputFilename = sourceMapOutput.normalizeFilename(this.options.sourceMapInputFilename);\n }\n if (this.options.sourceMapBasepath !== undefined && this.sourceMapURL !== undefined) {\n this.sourceMapURL = sourceMapOutput.removeBasepath(this.sourceMapURL);\n }\n return css + this.getCSSAppendage();\n }\n\n getCSSAppendage() {\n\n let sourceMapURL = this.sourceMapURL;\n if (this.options.sourceMapFileInline) {\n if (this.sourceMap === undefined) {\n return '';\n }\n sourceMapURL = `data:application/json;base64,${environment.encodeBase64(this.sourceMap)}`;\n }\n\n if (sourceMapURL) {\n return `/*# sourceMappingURL=${sourceMapURL} */`;\n }\n return '';\n }\n\n getExternalSourceMap() {\n return this.sourceMap;\n }\n\n setExternalSourceMap(sourceMap) {\n this.sourceMap = sourceMap;\n }\n\n isInline() {\n return this.options.sourceMapFileInline;\n }\n\n getSourceMapURL() {\n return this.sourceMapURL;\n }\n\n getOutputFilename() {\n return this.options.sourceMapOutputFilename;\n }\n\n getInputFilename() {\n return this.sourceMapInputFilename;\n }\n }\n\n return SourceMapBuilder;\n};\n","import LessError from './less-error';\nimport transformTree from './transform-tree';\nimport logger from './logger';\n\nexport default SourceMapBuilder => {\n class ParseTree {\n constructor(root, imports) {\n this.root = root;\n this.imports = imports;\n }\n\n toCSS(options) {\n let evaldRoot;\n const result = {};\n let sourceMapBuilder;\n try {\n evaldRoot = transformTree(this.root, options);\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n try {\n const compress = Boolean(options.compress);\n if (compress) {\n logger.warn('The compress option has been deprecated. ' + \n 'We recommend you use a dedicated css minifier, for instance see less-plugin-clean-css.');\n }\n\n const toCSSOptions = {\n compress,\n dumpLineNumbers: options.dumpLineNumbers,\n strictUnits: Boolean(options.strictUnits),\n numPrecision: 8};\n\n if (options.sourceMap) {\n sourceMapBuilder = new SourceMapBuilder(options.sourceMap);\n result.css = sourceMapBuilder.toCSS(evaldRoot, toCSSOptions, this.imports);\n } else {\n result.css = evaldRoot.toCSS(toCSSOptions);\n }\n } catch (e) {\n throw new LessError(e, this.imports);\n }\n\n if (options.pluginManager) {\n const postProcessors = options.pluginManager.getPostProcessors();\n for (let i = 0; i < postProcessors.length; i++) {\n result.css = postProcessors[i].process(result.css, { sourceMap: sourceMapBuilder, options, imports: this.imports });\n }\n }\n if (options.sourceMap) {\n result.map = sourceMapBuilder.getExternalSourceMap();\n }\n\n result.imports = [];\n for (const file in this.imports.files) {\n if (this.imports.files.hasOwnProperty(file) && file !== this.imports.rootFilename) {\n result.imports.push(file);\n }\n }\n return result;\n }\n }\n\n return ParseTree;\n};\n","import contexts from './contexts';\nimport Parser from './parser/parser';\nimport LessError from './less-error';\nimport * as utils from './utils';\nimport logger from './logger';\n\nexport default environment => {\n // FileInfo = {\n // 'rewriteUrls' - option - whether to adjust URL's to be relative\n // 'filename' - full resolved filename of current file\n // 'rootpath' - path to append to normal URLs for this node\n // 'currentDirectory' - path to the current file, absolute\n // 'rootFilename' - filename of the base file\n // 'entryPath' - absolute path to the entry file\n // 'reference' - whether the file should not be output and only output parts that are referenced\n\n class ImportManager {\n constructor(less, context, rootFileInfo) {\n this.less = less;\n this.rootFilename = rootFileInfo.filename;\n this.paths = context.paths || []; // Search paths, when importing\n this.contents = {}; // map - filename to contents of all the files\n this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore\n this.mime = context.mime;\n this.error = null;\n this.context = context;\n // Deprecated? Unused outside of here, could be useful.\n this.queue = []; // Files which haven't been imported yet\n this.files = {}; // Holds the imported parse trees.\n }\n\n /**\n * Add an import to be imported\n * @param path - the raw path\n * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension)\n * @param currentFileInfo - the current file info (used for instance to work out relative paths)\n * @param importOptions - import options\n * @param callback - callback for when it is imported\n */\n push(path, tryAppendExtension, currentFileInfo, importOptions, callback) {\n const importManager = this;\n const pluginLoader = this.context.pluginManager.Loader;\n\n this.queue.push(path);\n\n const fileParsedFunc = (e, root, fullPath) => {\n importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue\n\n const importedEqualsRoot = fullPath === importManager.rootFilename;\n if (importOptions.optional && e) {\n callback(null, {rules:[]}, false, null);\n logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`);\n }\n else {\n // Inline imports aren't cached here.\n // If we start to cache them, please make sure they won't conflict with non-inline imports of the\n // same name as they used to do before this comment and the condition below have been added.\n if (!importManager.files[fullPath] && !importOptions.inline) {\n importManager.files[fullPath] = { root, options: importOptions };\n }\n if (e && !importManager.error) { importManager.error = e; }\n callback(e, root, importedEqualsRoot, fullPath);\n }\n };\n\n const newFileInfo = {\n rewriteUrls: this.context.rewriteUrls,\n entryPath: currentFileInfo.entryPath,\n rootpath: currentFileInfo.rootpath,\n rootFilename: currentFileInfo.rootFilename\n };\n\n const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment);\n\n if (!fileManager) {\n fileParsedFunc({ message: `Could not find a file-manager for ${path}` });\n return;\n }\n\n const loadFileCallback = loadedFile => {\n let plugin;\n const resolvedFilename = loadedFile.filename;\n const contents = loadedFile.contents.replace(/^\\uFEFF/, '');\n\n // Pass on an updated rootpath if path of imported file is relative and file\n // is in a (sub|sup) directory\n //\n // Examples:\n // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/',\n // then rootpath should become 'less/module/nav/'\n // - If path of imported file is '../mixins.less' and rootpath is 'less/',\n // then rootpath should become 'less/../'\n newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename);\n if (newFileInfo.rewriteUrls) {\n newFileInfo.rootpath = fileManager.join(\n (importManager.context.rootpath || ''),\n fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath));\n\n if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) {\n newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath);\n }\n }\n newFileInfo.filename = resolvedFilename;\n\n const newEnv = new contexts.Parse(importManager.context);\n\n newEnv.processImports = false;\n importManager.contents[resolvedFilename] = contents;\n\n if (currentFileInfo.reference || importOptions.reference) {\n newFileInfo.reference = true;\n }\n\n if (importOptions.isPlugin) {\n plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo);\n if (plugin instanceof LessError) {\n fileParsedFunc(plugin, null, resolvedFilename);\n }\n else {\n fileParsedFunc(null, plugin, resolvedFilename);\n }\n } else if (importOptions.inline) {\n fileParsedFunc(null, contents, resolvedFilename);\n } else {\n\n // import (multiple) parse trees apparently get altered and can't be cached.\n // TODO: investigate why this is\n if (importManager.files[resolvedFilename]\n && !importManager.files[resolvedFilename].options.multiple\n && !importOptions.multiple) {\n\n fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename);\n }\n else {\n new Parser(newEnv, importManager, newFileInfo).parse(contents, (e, root) => {\n fileParsedFunc(e, root, resolvedFilename);\n });\n }\n }\n };\n let promise;\n const context = utils.clone(this.context);\n\n if (tryAppendExtension) {\n context.ext = importOptions.isPlugin ? '.js' : '.less';\n }\n\n if (importOptions.isPlugin) {\n context.mime = 'application/javascript';\n promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager);\n }\n else {\n promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment,\n (err, loadedFile) => {\n if (err) {\n fileParsedFunc(err);\n } else {\n loadFileCallback(loadedFile);\n }\n });\n }\n if (promise) {\n promise.then(loadFileCallback, fileParsedFunc);\n }\n }\n }\n\n return ImportManager;\n};\n","let PromiseConstructor;\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const render = function (input, options, callback) {\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n render.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n this.parse(input, options, (err, root, imports, options) => {\n if (err) { return callback(err); }\n\n let result;\n try {\n const parseTree = new ParseTree(root, imports);\n result = parseTree.toCSS(options);\n }\n catch (err) { return callback(err); }\n\n callback(null, result);\n });\n }\n };\n\n return render;\n};\n","let PromiseConstructor;\nimport contexts from './contexts';\nimport Parser from './parser/parser';\nimport PluginManager from './plugin-manager';\nimport LessError from './less-error';\nimport * as utils from './utils';\n\nexport default (environment, ParseTree, ImportManager) => {\n const parse = function (input, options, callback) {\n\n if (typeof options === 'function') {\n callback = options;\n options = utils.copyOptions(this.options, {});\n }\n else {\n options = utils.copyOptions(this.options, options || {});\n }\n\n if (!callback) {\n const self = this;\n return new Promise((resolve, reject) => {\n parse.call(self, input, options, (err, output) => {\n if (err) {\n reject(err);\n } else {\n resolve(output);\n }\n });\n });\n } else {\n let context;\n let rootFileInfo;\n const pluginManager = new PluginManager(this, !options.reUsePluginManager);\n\n options.pluginManager = pluginManager;\n\n context = new contexts.Parse(options);\n\n if (options.rootFileInfo) {\n rootFileInfo = options.rootFileInfo;\n } else {\n const filename = options.filename || 'input';\n const entryPath = filename.replace(/[^\\/\\\\]*$/, '');\n rootFileInfo = {\n filename,\n rewriteUrls: context.rewriteUrls,\n rootpath: context.rootpath || '',\n currentDirectory: entryPath,\n entryPath,\n rootFilename: filename\n };\n // add in a missing trailing slash\n if (rootFileInfo.rootpath && rootFileInfo.rootpath.slice(-1) !== '/') {\n rootFileInfo.rootpath += '/';\n }\n }\n\n const imports = new ImportManager(this, context, rootFileInfo);\n this.importManager = imports;\n\n // TODO: allow the plugins to be just a list of paths or names\n // Do an async plugin queue like lessc\n\n if (options.plugins) {\n options.plugins.forEach(plugin => {\n let evalResult;\n let contents;\n if (plugin.fileContent) {\n contents = plugin.fileContent.replace(/^\\uFEFF/, '');\n evalResult = pluginManager.Loader.evalPlugin(contents, context, imports, plugin.options, plugin.filename);\n if (evalResult instanceof LessError) {\n return callback(evalResult);\n }\n }\n else {\n pluginManager.addPlugin(plugin);\n }\n });\n }\n\n new Parser(context, imports, rootFileInfo)\n .parse(input, (e, root) => {\n if (e) { return callback(e); }\n callback(null, root, imports, options);\n }, options);\n }\n };\n return parse;\n};\n","// TODO: Add tests for browser @plugin\n/* global window */\n\nimport AbstractPluginLoader from '../less/environment/abstract-plugin-loader.js';\n\n/**\n * Browser Plugin Loader\n */\nclass PluginLoader extends AbstractPluginLoader {\n constructor(less) {\n super();\n\n this.less = less;\n // Should we shim this.require for browser? Probably not?\n }\n\n loadPlugin(filename, basePath, context, environment, fileManager) {\n return new Promise((fulfill, reject) => {\n fileManager.loadFile(filename, basePath, context, environment)\n .then(fulfill).catch(reject);\n });\n }\n}\n\nexport default PluginLoader;\n\n","import * as utils from './utils';\nimport browser from './browser';\n\nexport default (window, less, options) => {\n\n function errorHTML(e, rootHref) {\n const id = `less-error-message:${utils.extractId(rootHref || '')}`;\n const template = '
      • {content}
        • ';\n const elem = window.document.createElement('div');\n let timer;\n let content;\n const errors = [];\n const filename = e.filename || rootHref;\n const filenameNoPath = filename.match(/([^\\/]+(\\?.*)?)$/)[1];\n\n elem.id = id;\n elem.className = 'less-error-message';\n\n content = `

        ${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'}` + \n `

        in ${filenameNoPath} `;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += `on line ${e.line}, column ${e.column + 1}:

          ${errors.join('')}
        `;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `
        Stack Trace
        ${e.stack.split('\\n').slice(1).join('
        ')}`;\n }\n elem.innerHTML = content;\n\n // CSS for error messages\n browser.createCSS(window.document, [\n '.less-error-message ul, .less-error-message li {',\n 'list-style-type: none;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message label {',\n 'font-size: 12px;',\n 'margin-right: 15px;',\n 'padding: 4px 0;',\n 'color: #cc7777;',\n '}',\n '.less-error-message pre {',\n 'color: #dd6666;',\n 'padding: 4px 0;',\n 'margin: 0;',\n 'display: inline-block;',\n '}',\n '.less-error-message pre.line {',\n 'color: #ff0000;',\n '}',\n '.less-error-message h3 {',\n 'font-size: 20px;',\n 'font-weight: bold;',\n 'padding: 15px 0 5px 0;',\n 'margin: 0;',\n '}',\n '.less-error-message a {',\n 'color: #10a',\n '}',\n '.less-error-message .error {',\n 'color: red;',\n 'font-weight: bold;',\n 'padding-bottom: 2px;',\n 'border-bottom: 1px dashed red;',\n '}'\n ].join('\\n'), { title: 'error-message' });\n\n elem.style.cssText = [\n 'font-family: Arial, sans-serif',\n 'border: 1px solid #e00',\n 'background-color: #eee',\n 'border-radius: 5px',\n '-webkit-border-radius: 5px',\n '-moz-border-radius: 5px',\n 'color: #e00',\n 'padding: 15px',\n 'margin-bottom: 15px'\n ].join(';');\n\n if (options.env === 'development') {\n timer = setInterval(() => {\n const document = window.document;\n const body = document.body;\n if (body) {\n if (document.getElementById(id)) {\n body.replaceChild(elem, document.getElementById(id));\n } else {\n body.insertBefore(elem, body.firstChild);\n }\n clearInterval(timer);\n }\n }, 10);\n }\n }\n\n function removeErrorHTML(path) {\n const node = window.document.getElementById(`less-error-message:${utils.extractId(path)}`);\n if (node) {\n node.parentNode.removeChild(node);\n }\n }\n\n function removeErrorConsole(path) {\n // no action\n }\n\n function removeError(path) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n removeErrorHTML(path);\n } else if (options.errorReporting === 'console') {\n removeErrorConsole(path);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('remove', path);\n }\n }\n\n function errorConsole(e, rootHref) {\n const template = '{line} {content}';\n const filename = e.filename || rootHref;\n const errors = [];\n let content = `${e.type || 'Syntax'}Error: ${e.message || 'There is an error in your .less file'} in ${filename}`;\n\n const errorline = (e, i, classname) => {\n if (e.extract[i] !== undefined) {\n errors.push(template.replace(/\\{line\\}/, (parseInt(e.line, 10) || 0) + (i - 1))\n .replace(/\\{class\\}/, classname)\n .replace(/\\{content\\}/, e.extract[i]));\n }\n };\n\n if (e.line) {\n errorline(e, 0, '');\n errorline(e, 1, 'line');\n errorline(e, 2, '');\n content += ` on line ${e.line}, column ${e.column + 1}:\\n${errors.join('\\n')}`;\n }\n if (e.stack && (e.extract || options.logLevel >= 4)) {\n content += `\\nStack Trace\\n${e.stack}`;\n }\n less.logger.error(content);\n }\n\n function error(e, rootHref) {\n if (!options.errorReporting || options.errorReporting === 'html') {\n errorHTML(e, rootHref);\n } else if (options.errorReporting === 'console') {\n errorConsole(e, rootHref);\n } else if (typeof options.errorReporting === 'function') {\n options.errorReporting('add', e, rootHref);\n }\n }\n\n return {\n add: error,\n remove: removeError\n };\n};\n","/**\n * Kicks off less and compiles any stylesheets\n * used in the browser distributed version of less\n * to kick-start less using the browser api\n */\n/* global window, document */\n\nimport defaultOptions from '../less/default-options';\nimport addDefaultOptions from './add-default-options';\nimport root from './index';\n\nconst options = defaultOptions();\n\nif (window.less) {\n for (const key in window.less) {\n if (window.less.hasOwnProperty(key)) {\n options[key] = window.less[key];\n }\n }\n}\naddDefaultOptions(window, options);\n\noptions.plugins = options.plugins || [];\n\nif (window.LESS_PLUGINS) {\n options.plugins = options.plugins.concat(window.LESS_PLUGINS);\n}\n\nconst less = root(window, options);\nexport default less;\n\nwindow.less = less;\n\nlet css;\nlet head;\nlet style;\n\n// Always restore page visibility\nfunction resolveOrReject(data) {\n if (data.filename) {\n console.warn(data);\n }\n if (!options.async) {\n head.removeChild(style);\n }\n}\n\nif (options.onReady) {\n if (/!watch/.test(window.location.hash)) {\n less.watch();\n }\n // Simulate synchronous stylesheet loading by hiding page rendering\n if (!options.async) {\n css = 'body { display: none !important }';\n head = document.head || document.getElementsByTagName('head')[0];\n style = document.createElement('style');\n\n style.type = 'text/css';\n if (style.styleSheet) {\n style.styleSheet.cssText = css;\n } else {\n style.appendChild(document.createTextNode(css));\n }\n\n head.appendChild(style);\n }\n less.registerStylesheetsImmediately();\n less.pageLoadFinished = less.refresh(less.env === 'development').then(resolveOrReject, resolveOrReject);\n}\n","// Export a new default each time\nexport default () => ({\n /* Inline Javascript - @plugin still allowed */\n javascriptEnabled: false,\n\n /* Outputs a makefile import dependency list to stdout. */\n depends: false,\n\n /* (DEPRECATED) Compress using less built-in compression. \n * This does an okay job but does not utilise all the tricks of \n * dedicated css compression. */\n compress: false,\n\n /* Runs the less parser and just reports errors without any output. */\n lint: false,\n\n /* Sets available include paths.\n * If the file in an @import rule does not exist at that exact location, \n * less will look for it at the location(s) passed to this option. \n * You might use this for instance to specify a path to a library which \n * you want to be referenced simply and relatively in the less files. */\n paths: [],\n\n /* color output in the terminal */\n color: true,\n\n /* The strictImports controls whether the compiler will allow an @import inside of either \n * @media blocks or (a later addition) other selector blocks.\n * See: https://github.com/less/less.js/issues/656 */\n strictImports: false,\n\n /* Allow Imports from Insecure HTTPS Hosts */\n insecure: false,\n\n /* Allows you to add a path to every generated import and url in your css. \n * This does not affect less import statements that are processed, just ones \n * that are left in the output css. */\n rootpath: '',\n\n /* By default URLs are kept as-is, so if you import a file in a sub-directory \n * that references an image, exactly the same URL will be output in the css. \n * This option allows you to re-write URL's in imported files so that the \n * URL is always relative to the base imported file */\n rewriteUrls: false,\n\n /* How to process math \n * 0 always - eagerly try to solve all operations\n * 1 parens-division - require parens for division \"/\"\n * 2 parens | strict - require parens for all operations\n * 3 strict-legacy - legacy strict behavior (super-strict)\n */\n math: 0,\n\n /* Without this option, less attempts to guess at the output unit when it does maths. */\n strictUnits: false,\n\n /* Effectively the declaration is put at the top of your base Less file, \n * meaning it can be used but it also can be overridden if this variable \n * is defined in the file. */\n globalVars: null,\n\n /* As opposed to the global variable option, this puts the declaration at the\n * end of your base file, meaning it will override anything defined in your Less file. */\n modifyVars: null,\n\n /* This option allows you to specify a argument to go on to every URL. */\n urlArgs: ''\n});","import {addDataAttr} from './utils';\nimport browser from './browser';\n\nexport default (window, options) => {\n\n // use options from the current script tag data attribues\n addDataAttr(options, browser.currentScript(window));\n\n if (options.isFileProtocol === undefined) {\n options.isFileProtocol = /^(file|(chrome|safari)(-extension)?|resource|qrc|app):/.test(window.location.protocol);\n }\n\n // Load styles asynchronously (default: false)\n //\n // This is set to `false` by default, so that the body\n // doesn't start loading before the stylesheets are parsed.\n // Setting this to `true` can result in flickering.\n //\n options.async = options.async || false;\n options.fileAsync = options.fileAsync || false;\n\n // Interval between watch polls\n options.poll = options.poll || (options.isFileProtocol ? 1000 : 1500);\n\n options.env = options.env || (window.location.hostname == '127.0.0.1' ||\n window.location.hostname == '0.0.0.0' ||\n window.location.hostname == 'localhost' ||\n (window.location.port &&\n window.location.port.length > 0) ||\n options.isFileProtocol ? 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\ No newline at end of file From 2e39e4936603270784051aa23ad84379808be265 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Fri, 2 Aug 2019 16:59:29 -0700 Subject: [PATCH 08/17] Update dependencies --- .travis.yml | 3 +- appveyor.yml | 4 +- browser.js | 1 - build/rollup.js | 240 ++++++++++++++++++++++---------------------- package.json | 12 +-- test/modify-vars.js | 2 +- 6 files changed, 127 insertions(+), 135 deletions(-) delete mode 100644 browser.js diff --git a/.travis.yml b/.travis.yml index 52f7d4e7c..0cd3fa893 100644 --- a/.travis.yml +++ b/.travis.yml @@ -3,7 +3,8 @@ cache: directories: - travis-phantomjs node_js: - - "9" + - "12" + - "10" - "8" - "6" before_install: diff --git a/appveyor.yml b/appveyor.yml index e0bbf24cc..834e6fb61 100644 --- a/appveyor.yml +++ b/appveyor.yml @@ -1,10 +1,10 @@ # Test against these versions of Node.js. environment: matrix: - - nodejs_version: "4" - nodejs_version: "6" - nodejs_version: "8" - - nodejs_version: "9" + - nodejs_version: "10" + - nodejs_version: "12" # Install scripts. (runs after repo cloning) install: diff --git a/browser.js b/browser.js deleted file mode 100644 index d2170641f..000000000 --- a/browser.js +++ /dev/null @@ -1 +0,0 @@ -module.exports = require('./lib/less-browser'); diff --git a/build/rollup.js b/build/rollup.js index 788be9196..f38b27f6a 100644 --- a/build/rollup.js +++ b/build/rollup.js @@ -8,150 +8,146 @@ const banner = require('./banner'); const args = require('minimist')(process.argv.slice(2)); const babelConfig = { - exclude: 'node_modules/**' // only transpile our source code + exclude: 'node_modules/**' // only transpile our source code }; let outDir = args.dist ? './dist' : './tmp'; async function buildBrowser() { - let bundle = await rollup.rollup({ - input: './lib/less-browser/bootstrap.js', - output: [ - { - file: 'less.js', - format: 'umd' - }, - { - file: 'less.min.js', - format: 'umd' - } - ], - plugins: [ - resolve(), - commonjs(), - babel({ - ...babelConfig, - presets: [["@babel/env", { - targets: '> 0.25%, not dead' - }]] - }), - terser({ - include: [/^.+\.min\.js$/], - output: { - comments: function(node, comment) { - if (comment.type == "comment2") { - // preserve banner - return /@license/i.test(comment.value); + let bundle = await rollup.rollup({ + input: './lib/less-browser/bootstrap.js', + output: [ + { + file: 'less.js', + format: 'umd' + }, + { + file: 'less.min.js', + format: 'umd' } - } - } - }) - ] - }); + ], + plugins: [ + resolve(), + commonjs(), + babel({ + ...babelConfig, + presets: [["@babel/env", { + targets: '> 0.25%, not dead' + }]] + }), + terser({ + include: [/^.+\.min\.js$/], + output: { + comments: function(node, comment) { + if (comment.type == "comment2") { + // preserve banner + return /@license/i.test(comment.value); + } + } + } + }) + ] + }); - if (!args.out || args.out.indexOf('less.js') > -1) { - const file = args.out || `${outDir}/less.js`; - console.log(`Writing ${file}...`); - await bundle.write({ - file, - format: 'umd', - name: 'less', - banner - }); - } + if (!args.out || args.out.indexOf('less.js') > -1) { + const file = args.out || `${outDir}/less.js`; + console.log(`Writing ${file}...`); + await bundle.write({ + file, + format: 'umd', + name: 'less', + banner + }); + } - if (!args.out || args.out.indexOf('less.min.js') > -1) { - const file = args.out || `${outDir}/less.min.js`; - console.log(`Writing ${file}...`); - await bundle.write({ - file: args.out || `${outDir}/less.min.js`, - format: 'umd', - name: 'less', - sourcemap: true, - banner - }); - } + if (!args.out || args.out.indexOf('less.min.js') > -1) { + const file = args.out || `${outDir}/less.min.js`; + console.log(`Writing ${file}...`); + await bundle.write({ + file: args.out || `${outDir}/less.min.js`, + format: 'umd', + name: 'less', + sourcemap: true, + banner + }); + } } async function buildNode() { - let bundle = await rollup.rollup({ - input: './lib/less-node/index.js', - external(id) { - return /^[^.]/.test(id) - }, - plugins: [ - resolve({ - only: [/^\.{0,2}\//], - }), - commonjs(), - babel({ - ...babelConfig, - presets: [["@babel/env", { - targets: { - node: '6' - } - }]] - }) - ] - }); + let bundle = await rollup.rollup({ + input: './lib/less-node/index.js', + external(id) { + return /^[^.]/.test(id) + }, + plugins: [ + resolve(), + commonjs(), + babel({ + ...babelConfig, + presets: [["@babel/env", { + targets: { + node: '6' + } + }]] + }) + ] + }); - const file = args.out || './dist/less.cjs.js'; - console.log(`Writing ${file}...`); + const file = args.out || './dist/less.cjs.js'; + console.log(`Writing ${file}...`); - await bundle.write({ - file, - format: 'cjs', - interop: false - }); + await bundle.write({ + file, + format: 'cjs', + interop: false + }); } async function buildLessC() { - let bundle = await rollup.rollup({ - input: './lib/lessc.js', - external(id) { - return /^[^.]/.test(id) - }, - plugins: [ - resolve({ - only: [/^\.{0,2}\//], - }), - commonjs(), - babel({ - ...babelConfig, - presets: [["@babel/env", { - targets: { - node: '6' - } - }]] - }) - ] - }); + let bundle = await rollup.rollup({ + input: './lib/lessc.js', + external(id) { + return /^[^.]/.test(id) + }, + plugins: [ + resolve(), + commonjs(), + babel({ + ...babelConfig, + presets: [["@babel/env", { + targets: { + node: '6' + } + }]] + }) + ] + }); - const file = args.out || './bin/lessc' - console.log(`Writing ${file}...`); + const file = args.out || './bin/lessc' + console.log(`Writing ${file}...`); - await bundle.write({ - file, - banner: '#!/usr/bin/env node\n', - format: 'cjs', - interop: false - }); + await bundle.write({ + file, + banner: '#!/usr/bin/env node\n', + format: 'cjs', + interop: false + }); } async function build() { - if (args.dist || args.lessc) { - await buildLessC(); - } - if (args.dist || args.browser) { - await buildBrowser(); - } - if (args.dist || args.node) { - await buildNode(); - } + if (args.dist || args.lessc) { + await buildLessC(); + } + if (args.dist || args.browser) { + await buildBrowser(); + } + if (args.dist || args.node) { + await buildNode(); + } } try { - build(); + build(); } -catch(e) { - throw e; +catch (e) { + throw e; } \ No newline at end of file diff --git a/package.json b/package.json index 532118ea4..52ec3ce1a 100644 --- a/package.json +++ b/package.json @@ -26,15 +26,13 @@ "lessc": "./bin/lessc" }, "main": "index", + "module": "./lib/less-node/index", "directories": { "test": "./test" }, - "jam": { - "main": "./dist/less.js" - }, "browser": "./dist/less.js", "engines": { - "node": ">=4" + "node": ">=6" }, "scripts": { "test": "grunt test", @@ -59,13 +57,11 @@ "bootstrap-less-port": "0.3.0", "diff": "^3.2.0", "git-rev": "^0.2.1", - "grunt": "~0.4.5", - "grunt-cli": "^1.2.0", + "grunt": "^1.0.4", + "grunt-cli": "^1.3.2", "grunt-contrib-clean": "^1.0.0", - "grunt-contrib-concat": "^1.0.1", "grunt-contrib-connect": "^1.0.2", "grunt-contrib-jasmine": "^1.2.0", - "grunt-contrib-uglify": "^1.0.1", "grunt-eslint": "^22.0.0", "grunt-saucelabs": "^9.0.0", "grunt-shell": "^1.3.0", diff --git a/test/modify-vars.js b/test/modify-vars.js index 18aec1abc..b6962b202 100644 --- a/test/modify-vars.js +++ b/test/modify-vars.js @@ -1,4 +1,4 @@ -var less = require('../lib/less'), +var less = require('../tmp/less.cjs.js'), fs = require('fs'); var input = fs.readFileSync('./test/less/modifyVars/extended.less', 'utf8'); From bf8af54dbf9e88b096a90655ddcd69eb9d5eef38 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Fri, 2 Aug 2019 17:12:21 -0700 Subject: [PATCH 09/17] Fix tmp output --- .eslintignore | 3 ++- Gruntfile.js | 6 +++--- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/.eslintignore b/.eslintignore index 7c1aeb460..940889ad1 100644 --- a/.eslintignore +++ b/.eslintignore @@ -1,4 +1,5 @@ Gruntfile.js dist/* tmp/* -test/browser/vendor/* \ No newline at end of file +test/browser/vendor/* +test/browser/less.min.js \ No newline at end of file diff --git a/Gruntfile.js b/Gruntfile.js index 7276a5060..6fe86de07 100644 --- a/Gruntfile.js +++ b/Gruntfile.js @@ -195,9 +195,9 @@ module.exports = function(grunt) { }, testbuild: { command: [ - "node build/rollup.js --lessc --out='tmp/lessc'", - "node build/rollup.js --node --out='tmp/less.cjs.js'", - "node build/rollup.js --browser --out='test/browser/less.min.js'" + "node build/rollup.js --lessc --out='./tmp/lessc'", + "node build/rollup.js --node --out='./tmp/less.cjs.js'", + "node build/rollup.js --browser --out='./test/browser/less.min.js'" ].join(" && ") }, test: { From 0477e3a52a9aeeb12170ad559efa2eeb95184256 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Fri, 2 Aug 2019 17:33:11 -0700 Subject: [PATCH 10/17] Try to fix CI builds --- build/rollup.js | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/build/rollup.js b/build/rollup.js index f38b27f6a..062226c50 100644 --- a/build/rollup.js +++ b/build/rollup.js @@ -4,6 +4,9 @@ const resolve = require('rollup-plugin-node-resolve'); const commonjs = require('rollup-plugin-commonjs'); const terser = require('rollup-plugin-terser').terser; const banner = require('./banner'); +const path = require('path'); + +const rootPath = process.cwd(); const args = require('minimist')(process.argv.slice(2)); @@ -53,7 +56,7 @@ async function buildBrowser() { const file = args.out || `${outDir}/less.js`; console.log(`Writing ${file}...`); await bundle.write({ - file, + file: path.join(rootPath, file), format: 'umd', name: 'less', banner @@ -64,7 +67,7 @@ async function buildBrowser() { const file = args.out || `${outDir}/less.min.js`; console.log(`Writing ${file}...`); await bundle.write({ - file: args.out || `${outDir}/less.min.js`, + file: path.join(rootPath, file), format: 'umd', name: 'less', sourcemap: true, @@ -97,7 +100,7 @@ async function buildNode() { console.log(`Writing ${file}...`); await bundle.write({ - file, + file: path.join(rootPath, file), format: 'cjs', interop: false }); @@ -127,7 +130,7 @@ async function buildLessC() { console.log(`Writing ${file}...`); await bundle.write({ - file, + file: path.join(rootPath, file), banner: '#!/usr/bin/env node\n', format: 'cjs', interop: false From 902c439abd036df85264db55c337bf12ef87cc6e Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Fri, 2 Aug 2019 18:27:27 -0700 Subject: [PATCH 11/17] Try to fix CI builds --- build/rollup.js | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/build/rollup.js b/build/rollup.js index 062226c50..46f1e48c5 100644 --- a/build/rollup.js +++ b/build/rollup.js @@ -6,7 +6,7 @@ const terser = require('rollup-plugin-terser').terser; const banner = require('./banner'); const path = require('path'); -const rootPath = process.cwd(); +const rootPath = path.join(__dirname, '..'); const args = require('minimist')(process.argv.slice(2)); @@ -128,6 +128,7 @@ async function buildLessC() { const file = args.out || './bin/lessc' console.log(`Writing ${file}...`); + console.log(path.join(rootPath, file)); await bundle.write({ file: path.join(rootPath, file), From eb70c85e442c2db002b1c5dc2bb940d22d6b5289 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Fri, 2 Aug 2019 18:47:28 -0700 Subject: [PATCH 12/17] Try to fix CI builds --- Gruntfile.js | 6 +++--- build/rollup.js | 3 +-- 2 files changed, 4 insertions(+), 5 deletions(-) diff --git a/Gruntfile.js b/Gruntfile.js index 6fe86de07..6827a12e5 100644 --- a/Gruntfile.js +++ b/Gruntfile.js @@ -195,9 +195,9 @@ module.exports = function(grunt) { }, testbuild: { command: [ - "node build/rollup.js --lessc --out='./tmp/lessc'", - "node build/rollup.js --node --out='./tmp/less.cjs.js'", - "node build/rollup.js --browser --out='./test/browser/less.min.js'" + "node build/rollup.js --lessc --out=./tmp/lessc", + "node build/rollup.js --node --out=./tmp/less.cjs.js", + "node build/rollup.js --browser --out=./test/browser/less.min.js" ].join(" && ") }, test: { diff --git a/build/rollup.js b/build/rollup.js index 46f1e48c5..76f14abb4 100644 --- a/build/rollup.js +++ b/build/rollup.js @@ -126,9 +126,8 @@ async function buildLessC() { ] }); - const file = args.out || './bin/lessc' + const file = args.out || './bin/lessc'; console.log(`Writing ${file}...`); - console.log(path.join(rootPath, file)); await bundle.write({ file: path.join(rootPath, file), From d2e74993aef5847530fc6564364ba828a78e2cf3 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Fri, 2 Aug 2019 19:34:29 -0700 Subject: [PATCH 13/17] Remove spread operator for Node 6 --- build/rollup.js | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/build/rollup.js b/build/rollup.js index 76f14abb4..1a3956dbe 100644 --- a/build/rollup.js +++ b/build/rollup.js @@ -10,10 +10,6 @@ const rootPath = path.join(__dirname, '..'); const args = require('minimist')(process.argv.slice(2)); -const babelConfig = { - exclude: 'node_modules/**' // only transpile our source code -}; - let outDir = args.dist ? './dist' : './tmp'; async function buildBrowser() { @@ -33,7 +29,7 @@ async function buildBrowser() { resolve(), commonjs(), babel({ - ...babelConfig, + exclude: 'node_modules/**', // only transpile our source code presets: [["@babel/env", { targets: '> 0.25%, not dead' }]] @@ -86,7 +82,7 @@ async function buildNode() { resolve(), commonjs(), babel({ - ...babelConfig, + exclude: 'node_modules/**', // only transpile our source code presets: [["@babel/env", { targets: { node: '6' @@ -116,7 +112,7 @@ async function buildLessC() { resolve(), commonjs(), babel({ - ...babelConfig, + exclude: 'node_modules/**', // only transpile our source code presets: [["@babel/env", { targets: { node: '6' From c8ec01c82beb45fdbb8a2352c274dca0b8ff0024 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Sat, 3 Aug 2019 09:54:36 -0700 Subject: [PATCH 14/17] Improved browser test setup --- .npmignore | 2 + Gruntfile.js | 9 +- test/browser/onload.js | 13 ++ test/browser/test-runner-template.tmpl | 91 +++++------ test/browser/vendor/boot.js | 148 ++++++++++++++++++ .../{ => vendor}/jasmine-jsreporter.js | 0 6 files changed, 207 insertions(+), 56 deletions(-) create mode 100644 test/browser/onload.js create mode 100644 test/browser/vendor/boot.js rename test/browser/{ => vendor}/jasmine-jsreporter.js (100%) diff --git a/.npmignore b/.npmignore index 8a8fb6efb..9a66c1a0d 100644 --- a/.npmignore +++ b/.npmignore @@ -1,4 +1,6 @@ .gitattributes +.travis.yml +appveyor.yml build/ .grunt/ benchmark/ diff --git a/Gruntfile.js b/Gruntfile.js index 6827a12e5..11bb961b0 100644 --- a/Gruntfile.js +++ b/Gruntfile.js @@ -246,7 +246,6 @@ module.exports = function(grunt) { target: [ "test/**/*.js", "lib/less*/**/*.js", - "!test/browser/jasmine-jsreporter.js", "!test/less/errors/plugin/plugin-error.js" ], options: { @@ -267,10 +266,12 @@ module.exports = function(grunt) { options: { keepRunner: true, host: "http://localhost:8081/", - vendor: [ + polyfills: [ "./node_modules/phantomjs-polyfill-object-assign/object-assign-polyfill.js", - "test/browser/vendor/promise.js", - "test/browser/jasmine-jsreporter.js", + "test/browser/vendor/promise.js" + ], + vendor: [ + "test/browser/vendor/jasmine-jsreporter.js", "test/browser/common.js", "test/browser/less.min.js" ], diff --git a/test/browser/onload.js b/test/browser/onload.js new file mode 100644 index 000000000..79223c8b7 --- /dev/null +++ b/test/browser/onload.js @@ -0,0 +1,13 @@ +(function() { + window.DEFER = [window.onload]; + Object.defineProperty(window, 'onload', { + get: function() { + return function() {}; + }, + set: function(fn) { + window.DEFER.push(fn); + }, + enumerable: true, + configurable: true + }); +})(); \ No newline at end of file diff --git a/test/browser/test-runner-template.tmpl b/test/browser/test-runner-template.tmpl index ffaf05d9a..7b7df9969 100644 --- a/test/browser/test-runner-template.tmpl +++ b/test/browser/test-runner-template.tmpl @@ -2,46 +2,9 @@ - Jasmine Spec Runner - - <% var generateScriptTags = function(allScripts) { allScripts.forEach(function(script){ %> - - <% }); }; %> - - - <% var toArray = function(scripts) { - %>[<% - scripts.forEach(function(scriptUrl, index){ - %>"<%= scriptUrl %>"<% - if (index !== scripts.length -1) { - %>,<% - } - }); - %>]<% - }; %> - <% scripts.src.forEach(function(fullLessName) { var pathParts = fullLessName.split('/'); @@ -58,6 +21,38 @@ <% }) %> + + <% + + var generateScriptTags = function(allScripts) { + allScripts.forEach(function(script){ + if (script.indexOf('boot.js') > -1) { + script = '../../test/browser/vendor/boot.js' + } + %> <% + }); + }; + + generateScriptTags(scripts.polyfills); + generateScriptTags(scripts.jasmine); + generateScriptTags(scripts.boot); + generateScriptTags(scripts.helpers); + generateScriptTags(scripts.vendor); + + %> + + + <% var toArray = function(scripts) { + %>[<% + scripts.forEach(function(scriptUrl, index){ + %>"<%= scriptUrl %>"<% + if (index !== scripts.length -1) { + %>,<% + } + }); + %>]<% + }; %> + - <% generateScriptTags(scripts.polyfills); %> - <% generateScriptTags(scripts.jasmine); %> - <% generateScriptTags(scripts.boot); %> - <% generateScriptTags(scripts.helpers); %> - <% generateScriptTags(scripts.vendor); %> - diff --git a/test/browser/vendor/boot.js b/test/browser/vendor/boot.js new file mode 100644 index 000000000..abe9fba07 --- /dev/null +++ b/test/browser/vendor/boot.js @@ -0,0 +1,148 @@ +// Modified from grunt-contrib-jasmine + +/* +Copyright (c) 2008-2015 Pivotal Labs + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ +/** + Starting with version 2.0, this file "boots" Jasmine, performing all of the necessary initialization before executing the loaded environment and all of a project's specs. This file should be loaded after `jasmine.js` and `jasmine_html.js`, but before any project source files or spec files are loaded. Thus this file can also be used to customize Jasmine for a project. + + If a project is using Jasmine via the standalone distribution, this file can be customized directly. If a project is using Jasmine via the [Ruby gem][jasmine-gem], this file can be copied into the support directory via `jasmine copy_boot_js`. Other environments (e.g., Python) will have different mechanisms. + + The location of `boot.js` can be specified and/or overridden in `jasmine.yml`. + + [jasmine-gem]: http://github.com/pivotal/jasmine-gem + */ + +(function() { + + /** + * ## Require & Instantiate + * + * Require Jasmine's core files. Specifically, this requires and attaches all of Jasmine's code to the `jasmine` reference. + */ + window.jasmine = jasmineRequire.core(jasmineRequire); + + /** + * Since this is being run in a browser and the results should populate to an HTML page, require the HTML-specific Jasmine code, injecting the same reference. + */ + jasmineRequire.html(jasmine); + + /** + * Create the Jasmine environment. This is used to run all specs in a project. + */ + var env = jasmine.getEnv(); + + /** + * ## The Global Interface + * + * Build up the functions that will be exposed as the Jasmine public interface. A project can customize, rename or alias any of these functions as desired, provided the implementation remains unchanged. + */ + var jasmineInterface = jasmineRequire.interface(jasmine, env); + + /** + * Add all of the Jasmine global/public interface to the global scope, so a project can use the public interface directly. For example, calling `describe` in specs instead of `jasmine.getEnv().describe`. + */ + extend(window, jasmineInterface); + + /** + * ## Runner Parameters + * + * More browser specific code - wrap the query string in an object and to allow for getting/setting parameters from the runner user interface. + */ + + var queryString = new jasmine.QueryString({ + getWindowLocation: function() { return window.location; } + }); + + var catchingExceptions = queryString.getParam("catch"); + env.catchExceptions(typeof catchingExceptions === "undefined" ? true : catchingExceptions); + + var throwingExpectationFailures = queryString.getParam("throwFailures"); + env.throwOnExpectationFailure(throwingExpectationFailures); + + var random = queryString.getParam("random"); + env.randomizeTests(random); + + var seed = queryString.getParam("seed"); + if (seed) { + env.seed(seed); + } + + /** + * ## Reporters + * The `HtmlReporter` builds all of the HTML UI for the runner page. This reporter paints the dots, stars, and x's for specs, as well as all spec names and all failures (if any). + */ + var htmlReporter = new jasmine.HtmlReporter({ + env: env, + onRaiseExceptionsClick: function() { queryString.navigateWithNewParam("catch", !env.catchingExceptions()); }, + onThrowExpectationsClick: function() { queryString.navigateWithNewParam("throwFailures", !env.throwingExpectationFailures()); }, + onRandomClick: function() { queryString.navigateWithNewParam("random", !env.randomTests()); }, + addToExistingQueryString: function(key, value) { return queryString.fullStringWithNewParam(key, value); }, + getContainer: function() { return document.body; }, + createElement: function() { return document.createElement.apply(document, arguments); }, + createTextNode: function() { return document.createTextNode.apply(document, arguments); }, + timer: new jasmine.Timer() + }); + + /** + * The `jsApiReporter` also receives spec results, and is used by any environment that needs to extract the results from JavaScript. + */ + env.addReporter(jasmineInterface.jsApiReporter); + env.addReporter(htmlReporter); + + /** + * Filter which specs will be run by matching the start of the full name against the `spec` query param. + */ + var specFilter = new jasmine.HtmlSpecFilter({ + filterString: function() { return queryString.getParam("spec"); } + }); + + env.specFilter = function(spec) { + return specFilter.matches(spec.getFullName()); + }; + + /** + * Setting up timing functions to be able to be overridden. Certain browsers (Safari, IE 8, phantomjs) require this hack. + */ + window.setTimeout = window.setTimeout; + window.setInterval = window.setInterval; + window.clearTimeout = window.clearTimeout; + window.clearInterval = window.clearInterval; + + /** + * Customized for Less.js + */ + + window.DEFER = function() { + htmlReporter.initialize(); + env.execute(); + }; + + /** + * Helper function for readability above. + */ + function extend(destination, source) { + for (var property in source) destination[property] = source[property]; + return destination; + } + +}()); diff --git a/test/browser/jasmine-jsreporter.js b/test/browser/vendor/jasmine-jsreporter.js similarity index 100% rename from test/browser/jasmine-jsreporter.js rename to test/browser/vendor/jasmine-jsreporter.js From cc841d55617275259372dea0863d6d7531913910 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Sat, 3 Aug 2019 10:06:55 -0700 Subject: [PATCH 15/17] Downgrade grunt-eslint to support Node 6 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 52ec3ce1a..3dc3ee2b5 100644 --- a/package.json +++ b/package.json @@ -62,7 +62,7 @@ "grunt-contrib-clean": "^1.0.0", "grunt-contrib-connect": "^1.0.2", "grunt-contrib-jasmine": "^1.2.0", - "grunt-eslint": "^22.0.0", + "grunt-eslint": "^21.1.0", "grunt-saucelabs": "^9.0.0", "grunt-shell": "^1.3.0", "import-module": "file:test/import-module", From ef16558689f7efcf1853ed10704364aa269d6390 Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Sat, 3 Aug 2019 10:20:03 -0700 Subject: [PATCH 16/17] Add console errors for unfinished Less promise --- test/browser/common.js | 4 ++++ test/browser/runner-browser-options.js | 5 ----- 2 files changed, 4 insertions(+), 5 deletions(-) diff --git a/test/browser/common.js b/test/browser/common.js index fcdc184a1..1b98fe577 100644 --- a/test/browser/common.js +++ b/test/browser/common.js @@ -143,6 +143,10 @@ testSheet = function (sheet) { expect(lessOutput).toEqual(text); done(); }); + }) + .catch(function(err) { + console.log(err); + done(); }); }); }; diff --git a/test/browser/runner-browser-options.js b/test/browser/runner-browser-options.js index 780de3861..c59590a1d 100644 --- a/test/browser/runner-browser-options.js +++ b/test/browser/runner-browser-options.js @@ -15,11 +15,6 @@ var less = { var testFiles = ['charsets', 'colors', 'comments', 'css-3', 'strings', 'media', 'mixins'], testSheets = []; -// IE 8-10 does not support less in style tags -if (window.navigator.userAgent.indexOf('MSIE') >= 0) { - testFiles.length = 0; -} - // setup style tags with less and link tags pointing to expected css output for (var i = 0; i < testFiles.length; i++) { From 13525ccbb601fc9406056a6138764b982cf1be3b Mon Sep 17 00:00:00 2001 From: Matthew Dean Date: Sat, 3 Aug 2019 10:27:47 -0700 Subject: [PATCH 17/17] Simplify in-browser plugin --- test/browser/less/plugin/plugin.js | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/test/browser/less/plugin/plugin.js b/test/browser/less/plugin/plugin.js index 8065d815c..43d333ae3 100644 --- a/test/browser/less/plugin/plugin.js +++ b/test/browser/less/plugin/plugin.js @@ -1,7 +1,4 @@ -registerPlugin({ - install: function(less, pluginManager, functions) { - functions.add('func', function() { - return less.anonymous(location.href); - }); - } -}); \ No newline at end of file + +functions.add('func', function() { + return less.anonymous(location.href); +});