1 /****************************************************************************
  2  Copyright (c) 2010-2012 cocos2d-x.org
  3  Copyright (c) 2008-2010 Ricardo Quesada
  4  Copyright (c) 2011      Zynga 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  * @extends cc.Class
 32  */
 33 cc.Screen = cc.Class.extend({
 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     init: function () {
 79 	    this._fn = {};
 80 	    var i, val, map = this._fnMap, valL;
 81 	    for (i = 0, l = map.length; i < l; i++ ) {
 82 		    val = map[ i ];
 83 		    if ( val && val[1] in document ) {
 84 			    for ( i = 0, valL = val.length; i < valL; i++ ) {
 85 				    this._fn[ map[0][ i ] ] = val[ i ];
 86 			    }
 87 			    break;
 88 		    }
 89 	    }
 90 
 91 		this._supportsFullScreen = (this._fn.requestFullscreen != undefined);
 92         this._touchEvent = ('ontouchstart' in window) ? 'touchstart' : 'mousedown';
 93     },
 94 
 95     /**
 96      * return true if it's full now.
 97      * @returns {Boolean}
 98      */
 99     fullScreen: function() {
100 	    return this._supportsFullScreen && document[ this._fn.fullscreenEnabled ];
101     },
102 
103     /**
104      * change the screen to full mode.
105      * @param {Element} element
106      * @param {Function} onFullScreenChange
107      * @returns {*}
108      */
109     requestFullScreen: function (element, onFullScreenChange) {
110 	    if (!this._supportsFullScreen) return;
111 
112 	    element = element || document.documentElement;
113 	    element[ this._fn.requestFullscreen ]();
114 
115 	    if (onFullScreenChange) {
116 		    var eventName = this._fn.fullscreenchange;
117 		    if (this._preOnFullScreenChange)
118 			    document.removeEventListener(eventName, this._preOnFullScreenChange);
119 		    this._preOnFullScreenChange = onFullScreenChange;
120 		    document.addEventListener(eventName, onFullScreenChange, false);
121 	    }
122 
123         return element[ this._fn.requestFullscreen ]();
124     },
125 
126     /**
127      * exit the full mode.
128      * @returns {*}
129      */
130     exitFullScreen: function () {
131         return this._supportsFullScreen ? document[ this._fn.exitFullscreen ]() : true;
132     },
133 
134     /**
135      * Automatically request full screen with a touch/click event
136      * @param {Element} element
137      * @param {Function} onFullScreenChange
138      */
139     autoFullScreen: function (element, onFullScreenChange) {
140 	    element = element || document.body;
141 	    var touchTarget = cc.canvas || element;
142         var theScreen = this;
143         // Function bind will be too complicated here because we need the callback function's reference to remove the listener
144         function callback() {
145             theScreen.requestFullScreen(element, onFullScreenChange);
146             touchTarget.removeEventListener(theScreen._touchEvent, callback);
147         }
148         this.requestFullScreen(element, onFullScreenChange);
149         touchTarget.addEventListener(this._touchEvent, callback);
150     }
151 });
152 
153 /**
154  * returns a shared instance of the cc.Screen
155  * @function
156  * @return {cc.Screen}
157  */
158 cc.Screen.getInstance = function () {
159     if (!this._instance){
160         var screen = new cc.Screen();
161         screen.init();
162         this._instance = screen;
163     }
164     return this._instance;
165 };
166