1 /** 2 * The Render Engine 3 * DocumentContext 4 * 5 * @fileoverview A render context which wraps the DOM document node. 6 * 7 * @author: Brett Fattori (brettf@renderengine.com) 8 * @author: $Author: bfattori $ 9 * @version: $Revision: 1555 $ 10 * 11 * Copyright (c) 2011 Brett Fattori (brettf@renderengine.com) 12 * 13 * Permission is hereby granted, free of charge, to any person obtaining a copy 14 * of this software and associated documentation files (the "Software"), to deal 15 * in the Software without restriction, including without limitation the rights 16 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 17 * copies of the Software, and to permit persons to whom the Software is 18 * furnished to do so, subject to the following conditions: 19 * 20 * The above copyright notice and this permission notice shall be included in 21 * all copies or substantial portions of the Software. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 25 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 26 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 27 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 28 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 29 * THE SOFTWARE. 30 * 31 */ 32 33 // The class this file defines and its required classes 34 R.Engine.define({ 35 "class":"R.rendercontexts.DocumentContext", 36 "requires":[ 37 "R.rendercontexts.HTMLElementContext" 38 ] 39 }); 40 41 /** 42 * @class A reference to the <tt>document.body</tt> element as a rendering context. 43 * Aside from being The Render Engine's default rendering context, the context 44 * is essentially a wrapper for the HTML document. Wrapping, in this way, allows 45 * us to update not only this context, but all other contexts during an engine frame. 46 * 47 * @extends R.rendercontexts.HTMLElementContext 48 * @constructor 49 * @description Create an instance of a document rendering context. This context 50 * represents the HTML document body. Theoretically, only one of these 51 * contexts should ever be created. 52 */ 53 R.rendercontexts.DocumentContext = function () { 54 return R.rendercontexts.HTMLElementContext.extend(/** @scope R.rendercontexts.DocumentContext.prototype */{ 55 56 /** @private */ 57 constructor:function () { 58 this.base("DocumentContext", document.body); 59 60 // Special case 61 this.setObjectDataModel("DOMPosition", R.math.Point2D.ZERO); 62 }, 63 64 /** 65 * Reset the context, clearing it and preparing it for drawing. 66 */ 67 reset:function (rect) { 68 } 69 70 }, { /** @scope R.rendercontexts.DocumentContext.prototype */ 71 /** 72 * Get the class name of this object 73 * 74 * @return {String} "R.rendercontexts.DocumentContext" 75 */ 76 getClassName:function () { 77 return "R.rendercontexts.DocumentContext"; 78 }, 79 80 // The engine looks for this field to know when to startup 81 started:true 82 83 }); 84 };