src/third_party/WebKit/Source/devtools/front_end/ZoomManager.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * @constructor
   7  * @extends {WebInspector.Object}
   8  */
   9 WebInspector.ZoomManager = function()
  10 {
  11     this._zoomFactor = InspectorFrontendHost.zoomFactor();
  12     window.addEventListener("resize", this._onWindowResize.bind(this), true);
  13 };
  14
  15 WebInspector.ZoomManager.Events = {
  16     ZoomChanged: "ZoomChanged"
  17 };
  18
  19 WebInspector.ZoomManager.prototype = {
  20     /**
  21      * @return {number}
  22      */
  23     zoomFactor: function()
  24     {
  25         return this._zoomFactor;
  26     },
  27
  28     _onWindowResize: function()
  29     {
  30         var oldZoomFactor = this._zoomFactor;
  31         this._zoomFactor = InspectorFrontendHost.zoomFactor();
  32         if (oldZoomFactor !== this._zoomFactor)
  33             this.dispatchEventToListeners(WebInspector.ZoomManager.Events.ZoomChanged, {from: oldZoomFactor, to: this._zoomFactor});
  34     },
  35
  36     __proto__: WebInspector.Object.prototype
  37 };
  38
  39 /**
  40  * @type {!WebInspector.ZoomManager}
  41  */
  42 WebInspector.zoomManager;