1 /****************************************************************************
  2  Copyright (c) 2008-2010 Ricardo Quesada
  3  Copyright (c) 2011-2012 cocos2d-x.org
  4  Copyright (c) 2013-2014 Chukong Technologies Inc.
  5  
  6  http://www.cocos2d-x.org
  7  
  8  Permission is hereby granted, free of charge, to any person obtaining a copy
  9  of this software and associated documentation files (the "Software"), to deal
 10  in the Software without restriction, including without limitation the rights
 11  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 12  copies of the Software, and to permit persons to whom the Software is
 13  furnished to do so, subject to the following conditions:
 14  
 15  The above copyright notice and this permission notice shall be included in
 16  all copies or substantial portions of the Software.
 17  
 18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 19  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 20  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 21  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 22  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 23  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 24  THE SOFTWARE.
 25  ****************************************************************************/
 26 
 27 /**
 28  * The fullscreen API provides an easy way for web content to be presented using the user's entire screen.
 29  * It's invalid on safari, QQbrowser and android browser
 30  * @class
 31  * @name cc.screen
 32  */
 33 cc.screen = /** @lends cc.screen# */{
 34     _supportsFullScreen: false,
 35     // the pre fullscreenchange function
 36     _preOnFullScreenChange: null,
 37     _touchEvent: "",
 38     _fn: null,
 39     // Function mapping for cross browser support
 40     _fnMap: [
 41         [
 42             'requestFullscreen',
 43             'exitFullscreen',
 44             'fullscreenchange',
 45             'fullscreenEnabled',
 46             'fullscreenElement'
 47         ],
 48         [
 49             'requestFullScreen',
 50             'exitFullScreen',
 51             'fullScreenchange',
 52             'fullScreenEnabled',
 53             'fullScreenElement'
 54         ],
 55         [
 56             'webkitRequestFullScreen',
 57             'webkitCancelFullScreen',
 58             'webkitfullscreenchange',
 59             'webkitIsFullScreen',
 60             'webkitCurrentFullScreenElement'
 61         ],
 62         [
 63             'mozRequestFullScreen',
 64             'mozCancelFullScreen',
 65             'mozfullscreenchange',
 66             'mozFullScreen',
 67             'mozFullScreenElement'
 68         ],
 69         [
 70             'msRequestFullscreen',
 71             'msExitFullscreen',
 72             'MSFullscreenChange',
 73             'msFullscreenEnabled',
 74             'msFullscreenElement'
 75         ]
 76     ],
 77     
 78     /**
 79      * initialize
 80      * @function
 81      */
 82     init: function () {
 83         this._fn = {};
 84         var i, val, map = this._fnMap, valL;
 85         for (i = 0, l = map.length; i < l; i++) {
 86             val = map[i];
 87             if (val && val[1] in document) {
 88                 for (i = 0, valL = val.length; i < valL; i++) {
 89                     this._fn[map[0][i]] = val[i];
 90                 }
 91                 break;
 92             }
 93         }
 94 
 95         this._supportsFullScreen = (typeof this._fn.requestFullscreen !== 'undefined');
 96         this._touchEvent = ('ontouchstart' in window) ? 'touchstart' : 'mousedown';
 97     },
 98     
 99     /**
100      * return true if it's full now.
101      * @returns {Boolean}
102      */
103     fullScreen: function () {
104         if(!this._supportsFullScreen)   return false;
105         else if( document[this._fn.fullscreenElement] === undefined || document[this._fn.fullscreenElement] === null )
106             return false;
107         else
108             return true;
109     },
110     
111     /**
112      * change the screen to full mode.
113      * @param {Element} element
114      * @param {Function} onFullScreenChange
115      */
116     requestFullScreen: function (element, onFullScreenChange) {
117         if (!this._supportsFullScreen) {
118             return;
119         }
120 
121         element = element || document.documentElement;
122 
123         if (onFullScreenChange) {
124             var eventName = this._fn.fullscreenchange;
125             if (this._preOnFullScreenChange) {
126                 document.removeEventListener(eventName, this._preOnFullScreenChange);
127             }
128             this._preOnFullScreenChange = onFullScreenChange;
129             document.addEventListener(eventName, onFullScreenChange, false);
130         }
131 
132         return element[this._fn.requestFullscreen]();
133     },
134     
135     /**
136      * exit the full mode.
137      * @return {Boolean}
138      */
139     exitFullScreen: function () {
140         return this._supportsFullScreen ? document[this._fn.exitFullscreen]() : true;
141     },
142     
143     /**
144      * Automatically request full screen with a touch/click event
145      * @param {Element} element
146      * @param {Function} onFullScreenChange
147      */
148     autoFullScreen: function (element, onFullScreenChange) {
149         element = element || document.body;
150         var touchTarget = cc.game.canvas || element;
151         var theScreen = this;
152         // Function bind will be too complicated here because we need the callback function's reference to remove the listener
153         function callback() {
154             touchTarget.removeEventListener(theScreen._touchEvent, callback);
155             theScreen.requestFullScreen(element, onFullScreenChange);
156         }
157         this.requestFullScreen(element, onFullScreenChange);
158         touchTarget.addEventListener(this._touchEvent, callback);
159     }
160 };
161 cc.screen.init();
162