/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

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

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

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

Build date: 2013-04-03 15:07:25
*/
/**
 * @class Ext.ComponentMgr
 * <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>{@link Ext.Component#xtype 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.ComponentMgr = function(){
    var all = new Ext.util.MixedCollection();
    var types = {};
    var ptypes = {};

    return {
        /**
         * Registers a component.
         * @param {Ext.Component} c The component
         */
        register : function(c){
            all.add(c);
        },

        /**
         * Unregisters a component.
         * @param {Ext.Component} c The component
         */
        unregister : function(c){
            all.remove(c);
        },

        /**
         * Returns a component by {@link Ext.Component#id id}.
         * For additional details see {@link Ext.util.MixedCollection#get}.
         * @param {String} id The component {@link Ext.Component#id id}
         * @return Ext.Component The Component, <code>undefined</code> if not found, or <code>null</code> if a
         * Class was found.
         */
        get : function(id){
            return all.get(id);
        },

        /**
         * Registers a function that will be called when a Component with the specified id is added to ComponentMgr. This will happen on instantiation.
         * @param {String} id The component {@link Ext.Component#id id}
         * @param {Function} fn The callback function
         * @param {Object} scope The scope (<code>this</code> reference) in which the callback is executed. Defaults to the Component.
         */
        onAvailable : function(id, fn, scope){
            all.on("add", function(index, o){
                if(o.id == id){
                    fn.call(scope || o, o);
                    all.un("add", fn, scope);
                }
            });
        },

        /**
         * The MixedCollection used internally for the component cache. An example usage may be subscribing to
         * events on the MixedCollection to monitor addition or removal.  Read-only.
         * @type {MixedCollection}
         */
        all : all,
        
        /**
         * The xtypes that have been registered with the component manager.
         * @type {Object}
         */
        types : types,
        
        /**
         * The ptypes that have been registered with the component manager.
         * @type {Object}
         */
        ptypes: ptypes,
        
        /**
         * Checks if a Component type is registered.
         * @param {Ext.Component} xtype The mnemonic string by which the Component class may be looked up
         * @return {Boolean} Whether the type is registered.
         */
        isRegistered : function(xtype){
            return types[xtype] !== undefined;    
        },
        
        /**
         * Checks if a Plugin type is registered.
         * @param {Ext.Component} ptype The mnemonic string by which the Plugin class may be looked up
         * @return {Boolean} Whether the type is registered.
         */
        isPluginRegistered : function(ptype){
            return ptypes[ptype] !== undefined;    
        },        

        /**
         * <p>Registers a new Component constructor, keyed by a new
         * {@link Ext.Component#xtype}.</p>
         * <p>Use this method (or its alias {@link Ext#reg Ext.reg}) to register new
         * subclasses of {@link Ext.Component} so that lazy instantiation may be used when specifying
         * child Components.
         * see {@link Ext.Container#items}</p>
         * @param {String} xtype The mnemonic string by which the Component class may be looked up.
         * @param {Constructor} cls The new Component class.
         */
        registerType : function(xtype, cls){
            types[xtype] = cls;
            cls.xtype = xtype;
        },

        /**
         * Creates a new Component from the specified config object using the
         * config object's {@link Ext.component#xtype xtype} to determine the class to instantiate.
         * @param {Object} config A configuration object for the Component you wish to create.
         * @param {Constructor} defaultType The constructor to provide the default Component type 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(config, defaultType){
            return config.render ? config : new types[config.xtype || defaultType](config);
        },

        /**
         * <p>Registers a new Plugin constructor, keyed by a new
         * {@link Ext.Component#ptype}.</p>
         * <p>Use this method (or its alias {@link Ext#preg Ext.preg}) to register new
         * plugins for {@link Ext.Component}s so that lazy instantiation may be used when specifying
         * Plugins.</p>
         * @param {String} ptype The mnemonic string by which the Plugin class may be looked up.
         * @param {Constructor} cls The new Plugin class.
         */
        registerPlugin : function(ptype, cls){
            ptypes[ptype] = cls;
            cls.ptype = ptype;
        },

        /**
         * Creates a new Plugin from the specified config object using the
         * config object's {@link Ext.component#ptype ptype} to determine the class to instantiate.
         * @param {Object} config A configuration object for the Plugin you wish to create.
         * @param {Constructor} defaultType The constructor to provide the default Plugin type if
         * the config object does not contain a <code>ptype</code>. (Optional if the config contains a <code>ptype</code>).
         * @return {Ext.Component} The newly instantiated Plugin.
         */
        createPlugin : function(config, defaultType){
            var PluginCls = ptypes[config.ptype || defaultType];
            if (PluginCls.init) {
                return PluginCls;                
            } else {
                return new PluginCls(config);
            }            
        }
    };
}();

/**
 * Shorthand for {@link Ext.ComponentMgr#registerType}
 * @param {String} xtype The {@link Ext.component#xtype mnemonic string} by which the Component class
 * may be looked up.
 * @param {Constructor} cls The new Component class.
 * @member Ext
 * @method reg
 */
Ext.reg = Ext.ComponentMgr.registerType; // this will be called a lot internally, shorthand to keep the bytes down
/**
 * Shorthand for {@link Ext.ComponentMgr#registerPlugin}
 * @param {String} ptype The {@link Ext.component#ptype mnemonic string} by which the Plugin class
 * may be looked up.
 * @param {Constructor} cls The new Plugin class.
 * @member Ext
 * @method preg
 */
Ext.preg = Ext.ComponentMgr.registerPlugin;
/**
 * Shorthand for {@link Ext.ComponentMgr#create}
 * Creates a new Component from the specified config object using the
 * config object's {@link Ext.component#xtype xtype} to determine the class to instantiate.
 * @param {Object} config A configuration object for the Component you wish to create.
 * @param {Constructor} defaultType The constructor to provide the default Component type 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.
 * @member Ext
 * @method create
 */
Ext.create = Ext.ComponentMgr.create;