1283 - Javascript ++ Operator Gets Wrong Indentation

Resolves beautifier#1283 **What was done:** - Adapted function print_newline to restore mode if last_test was operator ++ or -- - Added corresponding test. **Example of behavior:** == Input == |== Expexted Output == {this.foo++ |{ bar} | this.foo++ | bar |} |
Elrendio · May 4, 2018 · 1a31818 · 1a31818
1 parent 36c3934
commit 1a31818
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Showing 6 changed files with 36 additions and 3 deletions.
diff --git a/js/lib/beautify.js b/js/lib/beautify.js
@@ -642,7 +642,7 @@ function Beautifier(js_source_text, options) {
 
     function print_newline(force_newline, preserve_statement_flags) {
         if (!preserve_statement_flags) {
-            if (flags.last_text !== ';' && flags.last_text !== ',' && flags.last_text !== '=' && last_type !== 'TK_OPERATOR') {
+            if (flags.last_text !== ';' && flags.last_text !== ',' && flags.last_text !== '=' && (last_type !== 'TK_OPERATOR' || flags.last_text === '--' || flags.last_text === '++')) {
                 var next_token = get_token(1);
                 while (flags.mode === MODE.Statement &&
                     !(flags.if_block && next_token && next_token.type === 'TK_RESERVED' && next_token.text === 'else') &&

diff --git a/js/src/javascript/beautifier.js b/js/src/javascript/beautifier.js
@@ -410,7 +410,7 @@ function Beautifier(js_source_text, options) {
 
     function print_newline(force_newline, preserve_statement_flags) {
         if (!preserve_statement_flags) {
-            if (flags.last_text !== ';' && flags.last_text !== ',' && flags.last_text !== '=' && last_type !== 'TK_OPERATOR') {
+            if (flags.last_text !== ';' && flags.last_text !== ',' && flags.last_text !== '=' && (last_type !== 'TK_OPERATOR' || flags.last_text === '--' || flags.last_text === '++')) {
                 var next_token = get_token(1);
                 while (flags.mode === MODE.Statement &&
                     !(flags.if_block && next_token && next_token.type === 'TK_RESERVED' && next_token.text === 'else') &&

diff --git a/js/test/generated/beautify-javascript-tests.js b/js/test/generated/beautify-javascript-tests.js
@@ -3744,6 +3744,16 @@ function run_javascript_tests(test_obj, Urlencoded, js_beautify, html_beautify,
             'if (someCondition) {\n' +
             '    return something;\n' +
             '}');
+
+        // Issue #1283 - Javascript ++ Operator get wrong indent 
+        bt(
+            '{this.foo++\n' +
+            'bar}',
+            //  -- output --
+            '{\n' +
+            '    this.foo++\n' +
+            '    bar\n' +
+            '}');
 
 
         //============================================================

diff --git a/python/jsbeautifier/javascript/beautifier.py b/python/jsbeautifier/javascript/beautifier.py
@@ -307,7 +307,7 @@ def allow_wrap_or_preserved_newline(self, current_token, force_linewrap = False)
 
     def print_newline(self, force_newline = False, preserve_statement_flags = False):
         if not preserve_statement_flags:
-            if self.flags.last_text != ';' and self.flags.last_text != ',' and self.flags.last_text != '=' and self.last_type != 'TK_OPERATOR':
+            if self.flags.last_text != ';' and self.flags.last_text != ',' and self.flags.last_text != '=' and (self.last_type != 'TK_OPERATOR' or self.flags.last_text == '--' or self.flags.last_text == '++'):
                 next_token = self.get_token(1)
                 while (self.flags.mode == MODE.Statement and
                         not (self.flags.if_block and next_token and next_token.type == 'TK_RESERVED' and next_token.text == 'else') and

diff --git a/python/jsbeautifier/tests/generated/tests.py b/python/jsbeautifier/tests/generated/tests.py
@@ -3572,6 +3572,16 @@ def unicode_char(value):
             'if (someCondition) {\n' +
             '    return something;\n' +
             '}')
+
+        # Issue #1283 - Javascript ++ Operator get wrong indent 
+        bt(
+            '{this.foo++\n' +
+            'bar}',
+            #  -- output --
+            '{\n' +
+            '    this.foo++\n' +
+            '    bar\n' +
+            '}')
 
 
         #============================================================

diff --git a/test/data/javascript/tests.js b/test/data/javascript/tests.js
@@ -2627,6 +2627,19 @@ exports.test_data = {
                     '    return something;',
                     '}'
                 ]
+            },
+            {
+                comment: "Issue #1283 - Javascript ++ Operator get wrong indent ",
+                input: [
+                    '{this.foo++',
+                    'bar}'
+                ],
+                output: [
+                    '{',
+                    '    this.foo++',
+                    '    bar',
+                    '}'
+                ]
             }
         ]
     }, {