From 72ee2d620a8071aa60511ee89a2efd404d8cf376 Mon Sep 17 00:00:00 2001
From: Florian Dreier <dreier.florian@gmail.com>
Date: Wed, 31 May 2023 00:19:19 +0200
Subject: [PATCH] fix: Replace custom `repeatString` function with `repeat()`
 (#2820)

chore: Replace custom repeatString functions with ECMAScript String.repeat()
---
 docs/demo/demo.js   | 10 +---------
 docs/demo/worker.js | 10 +---------
 lib/marked.cjs      | 24 ++----------------------
 lib/marked.esm.js   | 24 ++----------------------
 lib/marked.umd.js   | 24 ++----------------------
 marked.min.js       |  2 +-
 src/Lexer.js        |  5 ++---
 src/helpers.js      | 20 --------------------
 8 files changed, 11 insertions(+), 108 deletions(-)

diff --git a/docs/demo/demo.js b/docs/demo/demo.js
index 40a8c4840a..129a67fa2a 100644
--- a/docs/demo/demo.js
+++ b/docs/demo/demo.js
@@ -326,14 +326,6 @@ function isArray(arr) {
   return Object.prototype.toString.call(arr) === '[object Array]';
 }
 
-function stringRepeat(char, times) {
-  var s = '';
-  for (var i = 0; i < times; i++) {
-    s += char;
-  }
-  return s;
-}
-
 function jsonString(input, level) {
   level = level || 0;
   if (isArray(input)) {
@@ -344,7 +336,7 @@ function jsonString(input, level) {
         i;
     if (!isArray(input[0]) && typeof input[0] === 'object' && input[0] !== null) {
       for (i = 0; i < input.length; i++) {
-        items.push(stringRepeat(' ', 2 * level) + jsonString(input[i], level + 1));
+        items.push(' '.repeat(2 * level) + jsonString(input[i], level + 1));
       }
       return '[\n' + items.join('\n') + '\n]';
     }
diff --git a/docs/demo/worker.js b/docs/demo/worker.js
index 1f06cfb2f8..5c29285907 100644
--- a/docs/demo/worker.js
+++ b/docs/demo/worker.js
@@ -87,14 +87,6 @@ function parse(e) {
   }
 }
 
-function stringRepeat(char, times) {
-  var s = '';
-  for (var i = 0; i < times; i++) {
-    s += char;
-  }
-  return s;
-}
-
 function jsonString(input, level) {
   level = level || 0;
   if (Array.isArray(input)) {
@@ -105,7 +97,7 @@ function jsonString(input, level) {
         i;
     if (!Array.isArray(input[0]) && typeof input[0] === 'object' && input[0] !== null) {
       for (i = 0; i < input.length; i++) {
-        items.push(stringRepeat(' ', 2 * level) + jsonString(input[i], level + 1));
+        items.push(' '.repeat(2 * level) + jsonString(input[i], level + 1));
       }
       return '[\n' + items.join('\n') + '\n]';
     }
diff --git a/lib/marked.cjs b/lib/marked.cjs
index f3481167bd..b2e0cdd52d 100644
--- a/lib/marked.cjs
+++ b/lib/marked.cjs
@@ -372,26 +372,6 @@ function checkDeprecations(opt, callback) {
   }
 }
 
-// copied from https://stackoverflow.com/a/5450113/806777
-/**
- * @param {string} pattern
- * @param {number} count
- */
-function repeatString(pattern, count) {
-  if (count < 1) {
-    return '';
-  }
-  var result = '';
-  while (count > 1) {
-    if (count & 1) {
-      result += pattern;
-    }
-    count >>= 1;
-    pattern += pattern;
-  }
-  return result + pattern;
-}
-
 function outputLink(cap, link, raw, lexer) {
   var href = link.href;
   var title = link.title ? escape(link.title) : null;
@@ -1649,14 +1629,14 @@ var Lexer = /*#__PURE__*/function () {
       if (links.length > 0) {
         while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
           if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
-            maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+            maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
           }
         }
       }
     }
     // Mask out other blocks
     while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
-      maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+      maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
     }
 
     // Mask out escaped em & strong delimiters
diff --git a/lib/marked.esm.js b/lib/marked.esm.js
index 657fe12bc6..748fda58f3 100644
--- a/lib/marked.esm.js
+++ b/lib/marked.esm.js
@@ -312,26 +312,6 @@ function checkDeprecations(opt, callback) {
   }
 }
 
-// copied from https://stackoverflow.com/a/5450113/806777
-/**
- * @param {string} pattern
- * @param {number} count
- */
-function repeatString(pattern, count) {
-  if (count < 1) {
-    return '';
-  }
-  let result = '';
-  while (count > 1) {
-    if (count & 1) {
-      result += pattern;
-    }
-    count >>= 1;
-    pattern += pattern;
-  }
-  return result + pattern;
-}
-
 function outputLink(cap, link, raw, lexer) {
   const href = link.href;
   const title = link.title ? escape(link.title) : null;
@@ -1761,14 +1741,14 @@ class Lexer {
       if (links.length > 0) {
         while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
           if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
-            maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+            maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
           }
         }
       }
     }
     // Mask out other blocks
     while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
-      maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+      maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
     }
 
     // Mask out escaped em & strong delimiters
diff --git a/lib/marked.umd.js b/lib/marked.umd.js
index 2fcdce6cfa..3f9288a22a 100644
--- a/lib/marked.umd.js
+++ b/lib/marked.umd.js
@@ -376,26 +376,6 @@
     }
   }
 
-  // copied from https://stackoverflow.com/a/5450113/806777
-  /**
-   * @param {string} pattern
-   * @param {number} count
-   */
-  function repeatString(pattern, count) {
-    if (count < 1) {
-      return '';
-    }
-    var result = '';
-    while (count > 1) {
-      if (count & 1) {
-        result += pattern;
-      }
-      count >>= 1;
-      pattern += pattern;
-    }
-    return result + pattern;
-  }
-
   function outputLink(cap, link, raw, lexer) {
     var href = link.href;
     var title = link.title ? escape(link.title) : null;
@@ -1653,14 +1633,14 @@
         if (links.length > 0) {
           while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
             if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
-              maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+              maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
             }
           }
         }
       }
       // Mask out other blocks
       while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
-        maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+        maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
       }
 
       // Mask out escaped em & strong delimiters
diff --git a/marked.min.js b/marked.min.js
index 57d37aa853..4e58493792 100644
--- a/marked.min.js
+++ b/marked.min.js
@@ -3,4 +3,4 @@
  * Copyright (c) 2011-2023, Christopher Jeffrey. (MIT Licensed)
  * https://github.com/markedjs/marked
  */
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t((e="undefined"!=typeof globalThis?globalThis:e||self).marked={})}(this,function(r){"use strict";function i(e,t){for(var u=0;u<t.length;u++){var n=t[u];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(e,function(e){e=function(e,t){if("object"!=typeof e||null===e)return e;var u=e[Symbol.toPrimitive];if(void 0===u)return("string"===t?String:Number)(e);u=u.call(e,t||"default");if("object"!=typeof u)return u;throw new TypeError("@@toPrimitive must return a primitive value.")}(e,"string");return"symbol"==typeof e?e:String(e)}(n.key),n)}}function d(){return(d=Object.assign?Object.assign.bind():function(e){for(var t=1;t<arguments.length;t++){var u,n=arguments[t];for(u in n)Object.prototype.hasOwnProperty.call(n,u)&&(e[u]=n[u])}return e}).apply(this,arguments)}function 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r=n[1]||n[2]||"";if(!r||""===u||this.rules.inline.punctuation.exec(u)){var i=n[0].length-1,s=i,a=0,o="*"===n[0][0]?this.rules.inline.emStrong.rDelimAst:this.rules.inline.emStrong.rDelimUnd;for(o.lastIndex=0,t=t.slice(-1*e.length+i);null!=(n=o.exec(t));){var l,D=n[1]||n[2]||n[3]||n[4]||n[5]||n[6];if(D)if(l=D.length,n[3]||n[4])s+=l;else if((n[5]||n[6])&&i%3&&!((i+l)%3))a+=l;else if(!(0<(s-=l)))return l=Math.min(l,l+s+a),D=e.slice(0,i+n.index+(n[0].length-D.length)+l),Math.min(i,l)%2?(l=D.slice(1,-1),{type:"em",raw:D,text:l,tokens:this.lexer.inlineTokens(l)}):(l=D.slice(2,-2),{type:"strong",raw:D,text:l,tokens:this.lexer.inlineTokens(l)})}}}},t.codespan=function(e){var t,u,n,e=this.rules.inline.code.exec(e);if(e)return n=e[2].replace(/\n/g," "),t=/[^ ]/.test(n),u=/^ /.test(n)&&/ 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u(t).lex(e)},u.lexInline=function(e,t){return new u(t).inlineTokens(e)};var e,t,n=u.prototype;return n.lex=function(e){var t;for(e=e.replace(/\r\n|\r/g,"\n"),this.blockTokens(e,this.tokens);t=this.inlineQueue.shift();)this.inlineTokens(t.src,t.tokens);return this.tokens},n.blockTokens=function(r,i){var s,a,o,l,D=this;for(void 0===i&&(i=[]),r=this.options.pedantic?r.replace(/\t/g,"    ").replace(/^ +$/gm,""):r.replace(/^( *)(\t+)/gm,function(e,t,u){return t+"    ".repeat(u.length)});r;){var e=function(){if(D.options.extensions&&D.options.extensions.block&&D.options.extensions.block.some(function(e){return!!(s=e.call({lexer:D},r,i))&&(r=r.substring(s.raw.length),i.push(s),!0)}))return"continue";if(s=D.tokenizer.space(r))return r=r.substring(s.raw.length),1===s.raw.length&&0<i.length?i[i.length-1].raw+="\n":i.push(s),"continue";if(s=D.tokenizer.code(r))return 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r=r.substring(s.raw.length),!(a=i[i.length-1])||"paragraph"!==a.type&&"text"!==a.type?D.tokens.links[s.tag]||(D.tokens.links[s.tag]={href:s.href,title:s.title}):(a.raw+="\n"+s.raw,a.text+="\n"+s.raw,D.inlineQueue[D.inlineQueue.length-1].src=a.text),"continue";if(s=D.tokenizer.table(r))return r=r.substring(s.raw.length),i.push(s),"continue";if(s=D.tokenizer.lheading(r))return r=r.substring(s.raw.length),i.push(s),"continue";var t,u,n;if(o=r,D.options.extensions&&D.options.extensions.startBlock&&(t=1/0,u=r.slice(1),D.options.extensions.startBlock.forEach(function(e){"number"==typeof(n=e.call({lexer:this},u))&&0<=n&&(t=Math.min(t,n))}),t<1/0)&&0<=t&&(o=r.substring(0,t+1)),D.state.top&&(s=D.tokenizer.paragraph(o)))return a=i[i.length-1],l&&"paragraph"===a.type?(a.raw+="\n"+s.raw,a.text+="\n"+s.text,D.inlineQueue.pop(),D.inlineQueue[D.inlineQueue.length-1].src=a.text):i.push(s),l=o.length!==r.length,r=r.substring(s.raw.length),"continue";if(s=D.tokenizer.text(r))return 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To clear this warning, install  https://www.npmjs.com/package/marked-gfm-heading-id, or disable by setting `{headerIds: false}`."),u.hooks&&(u.hooks.options=u),n){var o,D=u.highlight;try{u.hooks&&(e=u.hooks.preprocess(e)),o=g(e,u)}catch(e){return l(e)}var c,p=function(t){var e;if(!t)try{u.walkTokens&&I.walkTokens(o,u.walkTokens),e=F(o,u),u.hooks&&(e=u.hooks.postprocess(e))}catch(e){t=e}return u.highlight=D,t?l(t):n(null,e)};return!D||D.length<3?p():(delete u.highlight,o.length?(c=0,I.walkTokens(o,function(u){"code"===u.type&&(c++,setTimeout(function(){D(u.text,u.lang,function(e,t){if(e)return p(e);null!=t&&t!==u.text&&(u.text=t,u.escaped=!0),0===--c&&p()})},0))}),void(0===c&&p())):p())}if(u.async)return Promise.resolve(u.hooks?u.hooks.preprocess(e):e).then(function(e){return g(e,u)}).then(function(e){return u.walkTokens?Promise.all(I.walkTokens(e,u.walkTokens)).then(function(){return e}):e}).then(function(e){return F(e,u)}).then(function(e){return u.hooks?u.hooks.postprocess(e):e}).catch(l);try{u.hooks&&(e=u.hooks.preprocess(e));var h=g(e,u),f=(u.walkTokens&&I.walkTokens(h,u.walkTokens),F(h,u));return f=u.hooks?u.hooks.postprocess(f):f}catch(e){return l(e)}}}function I(e,t,u){return R(y.lex,S.parse)(e,t,u)}T.passThroughHooks=new Set(["preprocess","postprocess"]),I.options=I.setOptions=function(e){return I.defaults=d({},I.defaults,e),e=I.defaults,r.defaults=e,I},I.getDefaults=e,I.defaults=r.defaults,I.use=function(){for(var D=I.defaults.extensions||{renderers:{},childTokens:{}},e=arguments.length,t=new Array(e),u=0;u<e;u++)t[u]=arguments[u];t.forEach(function(s){var u,e=d({},s);if(e.async=I.defaults.async||e.async||!1,s.extensions&&(s.extensions.forEach(function(r){if(!r.name)throw new Error("extension name required");var i;if(r.renderer&&(i=D.renderers[r.name],D.renderers[r.name]=i?function(){for(var e=arguments.length,t=new Array(e),u=0;u<e;u++)t[u]=arguments[u];var n=r.renderer.apply(this,t);return n=!1===n?i.apply(this,t):n}:r.renderer),r.tokenizer){if(!r.level||"block"!==r.level&&"inline"!==r.level)throw new Error("extension level must be 'block' or 'inline'");D[r.level]?D[r.level].unshift(r.tokenizer):D[r.level]=[r.tokenizer],r.start&&("block"===r.level?D.startBlock?D.startBlock.push(r.start):D.startBlock=[r.start]:"inline"===r.level&&(D.startInline?D.startInline.push(r.start):D.startInline=[r.start]))}r.childTokens&&(D.childTokens[r.name]=r.childTokens)}),e.extensions=D),s.renderer){var t,a=I.defaults.renderer||new _;for(t in s.renderer)!function(r){var i=a[r];a[r]=function(){for(var e=arguments.length,t=new Array(e),u=0;u<e;u++)t[u]=arguments[u];var n=s.renderer[r].apply(a,t);return n=!1===n?i.apply(a,t):n}}(t);e.renderer=a}if(s.tokenizer){var n,l=I.defaults.tokenizer||new b;for(n in s.tokenizer)!function(r){var i=l[r];l[r]=function(){for(var e=arguments.length,t=new Array(e),u=0;u<e;u++)t[u]=arguments[u];var n=s.tokenizer[r].apply(l,t);return n=!1===n?i.apply(l,t):n}}(n);e.tokenizer=l}if(s.hooks){var r,o=I.defaults.hooks||new T;for(r in s.hooks)!function(r){var i=o[r];T.passThroughHooks.has(r)?o[r]=function(e){return I.defaults.async?Promise.resolve(s.hooks[r].call(o,e)).then(function(e){return i.call(o,e)}):(e=s.hooks[r].call(o,e),i.call(o,e))}:o[r]=function(){for(var e=arguments.length,t=new Array(e),u=0;u<e;u++)t[u]=arguments[u];var n=s.hooks[r].apply(o,t);return n=!1===n?i.apply(o,t):n}}(r);e.hooks=o}s.walkTokens&&(u=I.defaults.walkTokens,e.walkTokens=function(e){var t=[];return t.push(s.walkTokens.call(this,e)),t=u?t.concat(u.call(this,e)):t}),I.setOptions(e)})},I.walkTokens=function(e,a){for(var l,o=[],t=D(e);!(l=t()).done;)!function(){var t=l.value;switch(o=o.concat(a.call(I,t)),t.type){case"table":for(var e=D(t.header);!(u=e()).done;){var u=u.value;o=o.concat(I.walkTokens(u.tokens,a))}for(var n,r=D(t.rows);!(n=r()).done;)for(var i=D(n.value);!(s=i()).done;){var s=s.value;o=o.concat(I.walkTokens(s.tokens,a))}break;case"list":o=o.concat(I.walkTokens(t.items,a));break;default:I.defaults.extensions&&I.defaults.extensions.childTokens&&I.defaults.extensions.childTokens[t.type]?I.defaults.extensions.childTokens[t.type].forEach(function(e){o=o.concat(I.walkTokens(t[e],a))}):t.tokens&&(o=o.concat(I.walkTokens(t.tokens,a)))}}();return o},I.parseInline=R(y.lexInline,S.parseInline),I.Parser=S,I.parser=S.parse,I.Renderer=_,I.TextRenderer=z,I.Lexer=y,I.lexer=y.lex,I.Tokenizer=b,I.Slugger=$,I.Hooks=T;var k=(I.parse=I).options,L=I.setOptions,U=I.use,Q=I.walkTokens,M=I.parseInline,N=I,H=S.parse,X=y.lex;r.Hooks=T,r.Lexer=y,r.Parser=S,r.Renderer=_,r.Slugger=$,r.TextRenderer=z,r.Tokenizer=b,r.getDefaults=e,r.lexer=X,r.marked=I,r.options=k,r.parse=N,r.parseInline=M,r.parser=H,r.setOptions=L,r.use=U,r.walkTokens=Q});
\ No newline at end of file
diff --git a/src/Lexer.js b/src/Lexer.js
index acb0fc2996..a7fd9090ff 100644
--- a/src/Lexer.js
+++ b/src/Lexer.js
@@ -1,7 +1,6 @@
 import { Tokenizer } from './Tokenizer.js';
 import { defaults } from './defaults.js';
 import { block, inline } from './rules.js';
-import { repeatString } from './helpers.js';
 
 /**
  * smartypants text replacement
@@ -338,14 +337,14 @@ export class Lexer {
       if (links.length > 0) {
         while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
           if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
-            maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+            maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
           }
         }
       }
     }
     // Mask out other blocks
     while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
-      maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+      maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
     }
 
     // Mask out escaped em & strong delimiters
diff --git a/src/helpers.js b/src/helpers.js
index 034dd8efd2..e219bf4cc2 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -269,23 +269,3 @@ export function checkDeprecations(opt, callback) {
     console.warn('marked(): headerIds and headerPrefix parameters enabled by default, but are deprecated since version 5.0.0, and will be removed in the future. To clear this warning, install  https://www.npmjs.com/package/marked-gfm-heading-id, or disable by setting `{headerIds: false}`.');
   }
 }
-
-// copied from https://stackoverflow.com/a/5450113/806777
-/**
- * @param {string} pattern
- * @param {number} count
- */
-export function repeatString(pattern, count) {
-  if (count < 1) {
-    return '';
-  }
-  let result = '';
-  while (count > 1) {
-    if (count & 1) {
-      result += pattern;
-    }
-    count >>= 1;
-    pattern += pattern;
-  }
-  return result + pattern;
-}