remoting/webapp/fullscreen_v2.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  * @fileoverview
   7  * Full-screen implementation for apps v2, using chrome.AppWindow.
   8  */
   9
  10 'use strict';
  11
  12 /** @suppress {duplicate} */
  13 var remoting = remoting || {};
  14
  15 /**
  16  * @constructor
  17  * @implements {remoting.Fullscreen}
  18  */
  19 remoting.FullscreenAppsV2 = function() {
  20   /**
  21    * @type {boolean} True if the next onRestored event should cause callbacks
  22    *     to be notified of a full-screen changed event. onRestored fires when
  23    *     full-screen mode is exited and also when the window is restored from
  24    *     being minimized; callbacks should not be notified of the latter.
  25    * @private
  26    */
  27   this.notifyCallbacksOnRestore_ = this.isActive();
  28
  29   /**
  30    * @type {string} Internal 'full-screen changed' event name
  31    * @private
  32    */
  33   this.kEventName_ = '_fullscreenchanged';
  34
  35   /**
  36    * @type {base.EventSource}
  37    * @private
  38    */
  39   this.eventSource_ = new base.EventSource();
  40   this.eventSource_.defineEvents([this.kEventName_]);
  41
  42   chrome.app.window.current().onFullscreened.addListener(
  43       this.onFullscreened_.bind(this));
  44   chrome.app.window.current().onRestored.addListener(
  45       this.onRestored_.bind(this));
  46 };
  47
  48 remoting.FullscreenAppsV2.prototype.activate = function(
  49     fullscreen, opt_onDone) {
  50   if (opt_onDone) {
  51     if (this.isActive() == fullscreen) {
  52       opt_onDone();
  53     } else {
  54       /** @type {remoting.Fullscreen} */
  55       var that = this;
  56       var callbackAndRemoveListener = function() {
  57         that.removeListener(callbackAndRemoveListener);
  58         opt_onDone();
  59       };
  60       this.addListener(callbackAndRemoveListener);
  61     }
  62   }
  63
  64   if (fullscreen) {
  65     chrome.app.window.current().fullscreen();
  66   } else if (this.isActive()) {
  67     chrome.app.window.current().restore();
  68   }
  69 };
  70
  71 remoting.FullscreenAppsV2.prototype.toggle = function() {
  72   this.activate(!this.isActive());
  73 };
  74
  75 remoting.FullscreenAppsV2.prototype.isActive = function() {
  76   return chrome.app.window.current().isFullscreen();
  77 };
  78
  79 remoting.FullscreenAppsV2.prototype.addListener = function(callback) {
  80   this.eventSource_.addEventListener(this.kEventName_, callback);
  81 };
  82
  83 remoting.FullscreenAppsV2.prototype.removeListener = function(callback) {
  84   this.eventSource_.removeEventListener(this.kEventName_, callback);
  85 };
  86
  87 remoting.FullscreenAppsV2.prototype.onFullscreened_ = function() {
  88   this.notifyCallbacksOnRestore_ = true;
  89   this.eventSource_.raiseEvent(this.kEventName_, true);
  90   document.body.classList.add('fullscreen');
  91 };
  92
  93 remoting.FullscreenAppsV2.prototype.onRestored_ = function() {
  94   document.body.classList.remove('fullscreen');
  95   if (this.notifyCallbacksOnRestore_) {
  96     this.notifyCallbacksOnRestore_ = false;
  97     this.eventSource_.raiseEvent(this.kEventName_, false);
  98   }
  99 };