1 /****************************************************************************
  2  Copyright (c) 2011-2012 cocos2d-x.org
  3  Copyright (c) 2013-2014 Chukong Technologies Inc.
  4 
  5  http://www.cocos2d-x.org
  6 
  7  Permission is hereby granted, free of charge, to any person obtaining a copy
  8  of this software and associated documentation files (the "Software"), to deal
  9  in the Software without restriction, including without limitation the rights
 10  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 11  copies of the Software, and to permit persons to whom the Software is
 12  furnished to do so, subject to the following conditions:
 13 
 14  The above copyright notice and this permission notice shall be included in
 15  all copies or substantial portions of the Software.
 16 
 17  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 18  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 19  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 20  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 21  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 22  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 23  THE SOFTWARE.
 24  ****************************************************************************/
 25 
 26 /**
 27  * The container of cc.Component
 28  * @class
 29  * @extends cc.Class
 30  */
 31 cc.ComponentContainer = cc.Class.extend(/** @lends cc.ComponentContainer# */{
 32     _components:null,
 33     _owner:null,
 34 
 35     ctor:function(node){
 36         this._components = null;
 37         this._owner = node;
 38     },
 39 
 40     getComponent:function(name){
 41         if(!name)
 42             throw "cc.ComponentContainer.getComponent(): name should be non-null";
 43         name = name.trim();
 44         return this._components[name];
 45     },
 46 
 47     add:function(component){
 48         if(!component)
 49              throw "cc.ComponentContainer.add(): component should be non-null";
 50         if(component.getOwner()){
 51             cc.log("cc.ComponentContainer.add(): Component already added. It can't be added again");
 52             return false;
 53         }
 54 
 55         if(this._components == null){
 56             this._components = {};
 57             this._owner.scheduleUpdate();
 58         }
 59         var oldComponent = this._components[component.getName()];
 60         if(oldComponent){
 61             cc.log("cc.ComponentContainer.add(): Component already added. It can't be added again");
 62             return false;
 63         }
 64         component.setOwner(this._owner);
 65         this._components[component.getName()] = component;
 66         component.onEnter();
 67         return true;
 68     },
 69 
 70     /**
 71      *
 72      * @param {String|cc.Component} name
 73      * @returns {boolean}
 74      */
 75     remove:function(name){
 76         if(!name)
 77             throw "cc.ComponentContainer.remove(): name should be non-null";
 78         if(!this._components)
 79             return false;
 80         if(name instanceof cc.Component){
 81             return this._removeByComponent(name);
 82         }else{
 83             name = name.trim();
 84             return this._removeByComponent(this._components[name]);
 85         }
 86     },
 87 
 88     _removeByComponent:function(component){
 89         if(component)
 90             return false;
 91         component.onExit();
 92         component.setOwner(null);
 93         delete this._components[component.getName()];
 94         return true;
 95     },
 96 
 97     removeAll:function(){
 98         if(!this._components)
 99             return;
100 
101         var locComponents = this._components;
102         for(var selKey in locComponents){
103             var selComponent = locComponents[selKey];
104             selComponent.onExit();
105             selComponent.setOwner(null);
106             delete locComponents[selKey];
107         }
108         this._owner.unscheduleUpdate();
109         this._components = null;
110     },
111 
112     _alloc:function(){
113         this._components = {};
114     },
115 
116     visit:function(delta){
117         if(!this._components)
118             return;
119 
120         var locComponents = this._components;
121         for(var selKey in locComponents){
122              locComponents[selKey].update(delta);
123         }
124     },
125 
126     isEmpty:function(){
127          if(!this._components)
128             return true;
129 
130         for(var selkey in this._components){
131             return false;
132         }
133         return true;
134     }
135 });
136 
137 
138