DevTools: [CodeMirror] remove auto-inserted whitespaces

Source/devtools/front_end/source_frame/CodeMirrorTextEditor.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 230 matching lines @@
         var selections = codeMirror.listSelections();
         var replacements = [];
         for (var i = 0; i < selections.length; ++i) {
             var selection = selections[i];
             var cur = CodeMirror.cmpPos(selection.head, selection.anchor) < 0 ? selection.head : selection.anchor;
             var line = codeMirror.getLine(cur.line);
             var indent = WebInspector.TextUtils.lineIndent(line);
             replacements.push("\n" + indent.substring(0, Math.min(cur.ch, indent.length)));
         }
         codeMirror.replaceSelections(replacements);
+        codeMirror._codeMirrorTextEditor._onAutoAppendedSpaces();
     }
 }
 
 /**
  * @param {!CodeMirror} codeMirror
  */
 CodeMirror.commands.gotoMatchingBracket = function(codeMirror)
 {
     var updatedSelections = [];
     var selections = codeMirror.listSelections();
@@ skipping 57 matching lines @@
 
     codemirror.setSelection(selection.anchor, selection.head, {scroll: false});
     codemirror._codeMirrorTextEditor._revealLine(selection.anchor.line);
 }
 
 WebInspector.CodeMirrorTextEditor.LongLineModeLineLengthThreshold = 2000;
 WebInspector.CodeMirrorTextEditor.MaximumNumberOfWhitespacesPerSingleSpan = 16;
 WebInspector.CodeMirrorTextEditor.MaxEditableTextSize = 1024 * 1024 * 10;
 
 WebInspector.CodeMirrorTextEditor.prototype = {
+    _onAutoAppendedSpaces: function()
+    {
+        this._autoAppendedSpaces = this._autoAppendedSpaces || [];
+        for (var i = 0; i < this._autoAppendedSpaces.length; ++i) {
+            var position = this._autoAppendedSpaces[i].resolve();
+            if (!position)
+                continue;
+            var line = this.line(position.lineNumber);
+            if (line.length === position.columnNumber && WebInspector.TextUtils.lineIndent(line).length === line.length)
+                this._codeMirror.replaceRange("", new CodeMirror.Pos(position.lineNumber, 0), new CodeMirror.Pos(position.lineNumber, position.columnNumber));
+        }
+        this._autoAppendedSpaces = [];
+        var selections = this.selections();
+        for (var i = 0; i < selections.length; ++i) {
+            var selection = selections[i];
+            this._autoAppendedSpaces.push(this.textEditorPositionHandle(selection.startLine, selection.startColumn));
+        }
+    },
+
     /**
      * @param {number} lineNumber
      * @param {number} lineLength
      * @param {number} charNumber
      * @return {{lineNumber: number, columnNumber: number}}
      */
     _normalizePositionForOverlappingColumn: function(lineNumber, lineLength, charNumber)
     {
         var linesCount = this._codeMirror.lineCount();
         var columnNumber = charNumber;
@@ skipping 1356 matching lines @@
                 isCollapsedBlock = true;
             } else if (line.substr(selection.head.ch - 1, 1) !== "{") {
                 return CodeMirror.Pass;
             }
             if (i > 0 && allSelectionsAreCollapsedBlocks !== isCollapsedBlock)
                 return CodeMirror.Pass;
             replacements.push(indentToInsert);
             allSelectionsAreCollapsedBlocks = isCollapsedBlock;
         }
         codeMirror.replaceSelections(replacements);
-        if (!allSelectionsAreCollapsedBlocks)
+        if (!allSelectionsAreCollapsedBlocks) {
+            codeMirror._codeMirrorTextEditor._onAutoAppendedSpaces();
             return;
+        }
         selections = codeMirror.listSelections();
         var updatedSelections = [];
         for (var i = 0; i < selections.length; ++i) {
             var selection = selections[i];
             var line = codeMirror.getLine(selection.head.line - 1);
             var position = new CodeMirror.Pos(selection.head.line - 1, line.length);
             updatedSelections.push({
                 head: position,
                 anchor: position
             });
         }
         codeMirror.setSelections(updatedSelections);
+        codeMirror._codeMirrorTextEditor._onAutoAppendedSpaces();
     },
 
     /**
      * @return {*}
      */
     "'}'": function(codeMirror)
     {
         if (codeMirror.somethingSelected())
             return CodeMirror.Pass;
 
@@ skipping 654 matching lines @@
     var backgroundColorRule = backgroundColor ? ".CodeMirror .CodeMirror-selected { background-color: " + backgroundColor + ";}" : "";
     var foregroundColor = InspectorFrontendHost.getSelectionForegroundColor();
     var foregroundColorRule = foregroundColor ? ".CodeMirror .CodeMirror-selectedtext:not(.CodeMirror-persist-highlight) { color: " + foregroundColor + "!important;}" : "";
     if (!foregroundColorRule && !backgroundColorRule)
         return;
 
     var style = document.createElement("style");
     style.textContent = backgroundColorRule + foregroundColorRule;
     document.head.appendChild(style);
 })();