DevTools: Substring autocomplete in Console and StylesSideBar.

third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js

 /*
  * Copyright (C) 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 311 matching lines @@
 
   clearAutocomplete() {
     if (this._isSuggestBoxVisible())
       this._suggestBox.hide();
     this._clearAutocompleteTimeout();
     this._queryRange = null;
     this._refreshGhostText();
   }
 
   _refreshGhostText() {
-    if (this._queryRange && this._isCaretAtEndOfPrompt()) {
+    if (this._queryRange && this._isCaretAtEndOfPrompt() && this._currentSuggestion.startsWith(this.text().substring(this._queryRange.startColumn))) {
       this._ghostTextElement.textContent =
           this._currentSuggestion.substring(this._queryRange.endColumn - this._queryRange.startColumn);
       this._element.appendChild(this._ghostTextElement);
     } else {
       this._ghostTextElement.remove();
     }
   }
 
   _clearAutocompleteTimeout() {
     if (this._completeTimeout) {
@@ skipping 293 matching lines @@
   }
 };
 
 WebInspector.TextPrompt.DefaultAutocompletionTimeout = 250;
 
 /** @enum {symbol} */
 WebInspector.TextPrompt.Events = {
   ItemApplied: Symbol('text-prompt-item-applied'),
   ItemAccepted: Symbol('text-prompt-item-accepted')
 };