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 component container for Cocostudio, it has some components.
 28  * @class
 29  * @extends cc.Class
 30  */
 31 cc.ComponentContainer = cc.Class.extend(/** @lends cc.ComponentContainer# */{
 32     _components:null,
 33     _owner:null,
 34 
 35     /**
 36      * Construction of cc.ComponentContainer
 37      * @param node
 38      */
 39     ctor:function(node){
 40         this._components = null;
 41         this._owner = node;
 42     },
 43 
 44     /**
 45      * Gets component by name.
 46      * @param name
 47      * @returns {*}
 48      */
 49     getComponent:function(name){
 50         if(!name)
 51             throw new Error("cc.ComponentContainer.getComponent(): name should be non-null");
 52         name = name.trim();
 53         if(!this._components){
 54             this._components = {};
 55         }
 56         return this._components[name];
 57     },
 58 
 59     /**
 60      * Adds a component to container
 61      * @param {cc.Component} component
 62      * @returns {boolean}
 63      */
 64     add:function(component){
 65         if(!component)
 66              throw new Error("cc.ComponentContainer.add(): component should be non-null");
 67         if(component.getOwner()){
 68             cc.log("cc.ComponentContainer.add(): Component already added. It can't be added again");
 69             return false;
 70         }
 71 
 72         if(this._components == null){
 73             this._components = {};
 74             this._owner.scheduleUpdate();
 75         }
 76         var oldComponent = this._components[component.getName()];
 77         if(oldComponent){
 78             cc.log("cc.ComponentContainer.add(): Component already added. It can't be added again");
 79             return false;
 80         }
 81         component.setOwner(this._owner);
 82         this._components[component.getName()] = component;
 83         component.onEnter();
 84         return true;
 85     },
 86 
 87     /**
 88      * Removes component from container by name or component object.
 89      * @param {String|cc.Component} name component name or component object.
 90      * @returns {boolean}
 91      */
 92     remove:function(name){
 93         if(!name)
 94             throw new Error("cc.ComponentContainer.remove(): name should be non-null");
 95         if(!this._components)
 96             return false;
 97         if(name instanceof cc.Component)
 98             return this._removeByComponent(name);
 99         else {
100             name = name.trim();
101             return this._removeByComponent(this._components[name]);
102         }
103     },
104 
105     _removeByComponent:function(component){
106         if(!component)
107             return false;
108         component.onExit();
109         component.setOwner(null);
110         delete this._components[component.getName()];
111         return true;
112     },
113 
114     /**
115      * Removes all components of container.
116      */
117     removeAll:function(){
118         if(!this._components)
119             return;
120         var locComponents = this._components;
121         for(var selKey in locComponents){
122             var selComponent = locComponents[selKey];
123             selComponent.onExit();
124             selComponent.setOwner(null);
125             delete locComponents[selKey];
126         }
127         this._owner.unscheduleUpdate();
128         this._components = null;
129     },
130 
131     _alloc:function(){
132         this._components = {};
133     },
134 
135     /**
136      * Visit callback by director. it calls every frame.
137      * @param {Number} delta
138      */
139     visit:function(delta){
140         if(!this._components)
141             return;
142 
143         var locComponents = this._components;
144         for(var selKey in locComponents)
145              locComponents[selKey].update(delta);
146     },
147 
148     /**
149      * Returns the container whether is empty.
150      * @returns {boolean}
151      */
152     isEmpty: function () {
153         if (!this._components)
154             return true;
155         return this._components.length === 0;
156     }
157 });
158 
159 
160