/*
This file is part of Ext JS 4.2

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial
Software License Agreement provided with the Software or, alternatively, in accordance with the
terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-09-18 17:18:59 (940c324ac822b840618a3a8b2b4b873f83a1a9b1)
*/
/**
 * @class Ext.ComponentManager
 * <p>Provides a registry of all Components (instances of {@link Ext.Component} or any subclass
 * thereof) on a page so that they can be easily accessed by {@link Ext.Component component}
 * {@link Ext.Component#id id} (see {@link #get}, or the convenience method {@link Ext#getCmp Ext.getCmp}).</p>
 * <p>This object also provides a registry of available Component <i>classes</i>
 * indexed by a mnemonic code known as the Component's {@link Ext.Component#xtype xtype}.
 * The <code>xtype</code> provides a way to avoid instantiating child Components
 * when creating a full, nested config object for a complete Ext page.</p>
 * <p>A child Component may be specified simply as a <i>config object</i>
 * as long as the correct <code>{@link Ext.Component#xtype xtype}</code> is specified so that if and when the Component
 * needs rendering, the correct type can be looked up for lazy instantiation.</p>
 * <p>For a list of all available <code>{@link Ext.Component#xtype xtypes}</code>, see {@link Ext.Component}.</p>
 * @singleton
 */
Ext.define('Ext.ComponentManager', {
    extend: 'Ext.AbstractManager',
    alternateClassName: 'Ext.ComponentMgr',
    
    singleton: true,
    
    typeName: 'xtype',
    
    /**
     * Creates a new Component from the specified config object using the
     * config object's xtype to determine the class to instantiate.
     * @param {Object} config A configuration object for the Component you wish to create.
     * @param {String} defaultType (optional) The xtype to use if the config object does not
     * contain a <code>xtype</code>. (Optional if the config contains a <code>xtype</code>).
     * @return {Ext.Component} The newly instantiated Component.
     */
    create: function(component, defaultType){
        if (typeof component == 'string') {
            return Ext.widget(component);
        }
        if (component.isComponent) {
            return component;
        }
        return Ext.widget(component.xtype || defaultType, component);
    },

    registerType: function(type, cls) {
        this.types[type] = cls;
        cls[this.typeName] = type;
        cls.prototype[this.typeName] = type;
    }
},
function () {
    /**
     * This is shorthand reference to {@link Ext.ComponentManager#get}.
     * Looks up an existing {@link Ext.Component Component} by {@link Ext.Component#id id}
     *
     * @param {String} id The component {@link Ext.Component#id id}
     * @return Ext.Component The Component, `undefined` if not found, or `null` if a
     * Class was found.
     * @member Ext
    */
    Ext.getCmp = function(id) {
        return Ext.ComponentManager.get(id);
    };
});
