fbird/frameworks/cocos2d-html5/extensions/cocostudio/components/CCComponentContainer.js

/****************************************************************************
 Copyright (c) 2011-2012 cocos2d-x.org
 Copyright (c) 2013-2014 Chukong Technologies Inc.

 http://www.cocos2d-x.org

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 all copies or substantial portions of the Software.

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/**
 * The component container for Cocostudio, it has some components.
 * @class
 * @extends cc.Class
 */
cc.ComponentContainer = cc.Class.extend(/** @lends cc.ComponentContainer# */{
    _components:null,
    _owner:null,

    /**
     * Construction of cc.ComponentContainer
     * @param node
     */
    ctor:function(node){
        this._components = null;
        this._owner = node;
    },

    /**
     * Gets component by name.
     * @param name
     * @returns {*}
     */
    getComponent:function(name){
        if(!name)
            throw new Error("cc.ComponentContainer.getComponent(): name should be non-null");
        name = name.trim();
        if(!this._components){
            this._components = {};
        }
        return this._components[name];
    },

    /**
     * Adds a component to container
     * @param {cc.Component} component
     * @returns {boolean}
     */
    add:function(component){
        if(!component)
             throw new Error("cc.ComponentContainer.add(): component should be non-null");
        if(component.getOwner()){
            cc.log("cc.ComponentContainer.add(): Component already added. It can't be added again");
            return false;
        }

        if(this._components == null){
            this._components = {};
            this._owner.scheduleUpdate();
        }
        var oldComponent = this._components[component.getName()];
        if(oldComponent){
            cc.log("cc.ComponentContainer.add(): Component already added. It can't be added again");
            return false;
        }
        component.setOwner(this._owner);
        this._components[component.getName()] = component;
        component.onEnter();
        return true;
    },

    /**
     * Removes component from container by name or component object.
     * @param {String|cc.Component} name component name or component object.
     * @returns {boolean}
     */
    remove:function(name){
        if(!name)
            throw new Error("cc.ComponentContainer.remove(): name should be non-null");
        if(!this._components)
            return false;
        if(name instanceof cc.Component)
            return this._removeByComponent(name);
        else {
            name = name.trim();
            return this._removeByComponent(this._components[name]);
        }
    },

    _removeByComponent:function(component){
        if(!component)
            return false;
        component.onExit();
        component.setOwner(null);
        delete this._components[component.getName()];
        return true;
    },

    /**
     * Removes all components of container.
     */
    removeAll:function(){
        if(!this._components)
            return;
        var locComponents = this._components;
        for(var selKey in locComponents){
            var selComponent = locComponents[selKey];
            selComponent.onExit();
            selComponent.setOwner(null);
            delete locComponents[selKey];
        }
        this._owner.unscheduleUpdate();
        this._components = null;
    },

    _alloc:function(){
        this._components = {};
    },

    /**
     * Visit callback by director. it calls every frame.
     * @param {Number} delta
     */
    visit:function(delta){
        if(!this._components)
            return;

        var locComponents = this._components;
        for(var selKey in locComponents)
             locComponents[selKey].update(delta);
    },

    /**
     * Returns the container whether is empty.
     * @returns {boolean}
     */
    isEmpty: function () {
        if (!this._components)
            return true;
        return this._components.length === 0;
    }
});