    /**
     * @class Ext.ComponentLoader
     * @extends Ext.ElementLoader
     *
     * This class is used to load content via Ajax into a {@link Ext.Component}. In general
     * this class will not be instanced directly, rather a loader configuration will be passed to the
     * constructor of the {@link Ext.Component}.
     *
     * ## HTML Renderer
     * By default, the content loaded will be processed as raw html. The response text
     * from the request is taken and added to the component. This can be used in
     * conjunction with the {@link #scripts} option to execute any inline scripts in
     * the resulting content. Using this renderer has the same effect as passing the
     * {@link Ext.Component#html} configuration option.
     *
     * ## Data Renderer
     * This renderer allows content to be added by using JSON data and a {@link Ext.XTemplate}.
     * The content received from the response is passed to the {@link Ext.Component#update} method.
     * This content is run through the attached {@link Ext.Component#tpl} and the data is added to
     * the Component. Using this renderer has the same effect as using the {@link Ext.Component#data}
     * configuration in conjunction with a {@link Ext.Component#tpl}.
     *
     * ## Component Renderer
     * This renderer can only be used with a {@link Ext.Container} and subclasses. It allows for
     * Components to be loaded remotely into a Container. The response is expected to be a single/series of
     * {@link Ext.Component} configuration objects. When the response is received, the data is decoded
     * and then passed to {@link Ext.Container#add}. Using this renderer has the same effect as specifying
     * the {@link Ext.Container#items} configuration on a Container.
     *
     * ## Custom Renderer
     * A custom function can be passed to handle any other special case, see the {@link #renderer} option.
     *
     * ## Example Usage
     *     new Ext.Component({
     *         tpl: '{firstName} - {lastName}',
     *         loader: {
     *             url: 'myPage.php',
     *             renderer: 'data',
     *             params: {
     *                 userId: 1
     *             }
     *         }
     *     });
     */
    Ext.define('Ext.ComponentLoader', {

        /* Begin Definitions */

        extend: 'Ext.ElementLoader',

        statics: {
            Renderer: {
                Data: function(loader, response, active){
                    var success = true;
                    try {
                        loader.getTarget().update(Ext.decode(response.responseText));
                    } catch (e) {
                        success = false;
                    }
                    return success;
                },

                Component: function(loader, response, active){
                    var success = true,
                        target = loader.getTarget(),
                        items = [];

                    //<debug>
                    if (!target.isContainer) {
                        Ext.Error.raise({
                            target: target,
                            msg: 'Components can only be loaded into a container'
                        });
                    }
                    //</debug>

                    try {
                        items = Ext.decode(response.responseText);
                    } catch (e) {
                        success = false;
                    }

                    if (success) {
                        if (active.removeAll) {
                            target.removeAll();
                        }
                        target.add(items);
                    }
                    return success;
                }
            }
        },

        /* End Definitions */

        /**
         * @cfg {Ext.Component/String} target The target {@link Ext.Component} for the loader. Defaults to <tt>null</tt>.
         * If a string is passed it will be looked up via the id.
         */
        target: null,

        /**
         * @cfg {Mixed} loadMask True or a {@link Ext.LoadMask} configuration to enable masking during loading. Defaults to <tt>false</tt>.
         */
        loadMask: false,

        /**
         * @cfg {Boolean} scripts True to parse any inline script tags in the response. This only used when using the html
         * {@link #renderer}.
         */

        /**
         * @cfg {String/Function} renderer

    The type of content that is to be loaded into, which can be one of 3 types:

    + **html** : Loads raw html content, see {@link Ext.Component#html}
    + **data** : Loads raw html content, see {@link Ext.Component#data}
    + **component** : Loads child {Ext.Component} instances. This option is only valid when used with a Container.

    Defaults to `html`.

    Alternatively, you can pass a function which is called with the following parameters.

    + loader - Loader instance
    + response - The server response
    + active - The active request

    The function must return false is loading is not successful. Below is a sample of using a custom renderer:

        new Ext.Component({
            loader: {
                url: 'myPage.php',
                renderer: function(loader, response, active) {
                    var text = response.responseText;
                    loader.getTarget().update('The response is ' + text);
                    return true;
                }
            }
        });
         * @markdown
         */
        renderer: 'html',

        /**
         * Set a {Ext.Component} as the target of this loader. Note that if the target is changed,
         * any active requests will be aborted.
         * @param {String/Ext.Component} target The component to be the target of this loader. If a string is passed
         * it will be looked up via its id.
         */
        setTarget: function(target){
            var me = this;

            if (Ext.isString(target)) {
                target = Ext.getCmp(target);
            }

            if (me.target && me.target != target) {
                me.abort();
            }
            me.target = target;
        },

        // inherit docs
        removeMask: function(){
            this.target.setLoading(false);
        },

        /**
         * Add the mask on the target
         * @private
         * @param {Mixed} mask The mask configuration
         */
        addMask: function(mask){
            this.target.setLoading(mask);
        },

        /**
         * Get the target of this loader.
         * @return {Ext.Component} target The target, null if none exists.
         */

        setOptions: function(active, options){
            active.removeAll = Ext.isDefined(options.removeAll) ? options.removeAll : this.removeAll;
        },

        /**
         * Gets the renderer to use
         * @private
         * @param {String/Function} renderer The renderer to use
         * @return {Function} A rendering function to use.
         */
        getRenderer: function(renderer){
            if (Ext.isFunction(renderer)) {
                return renderer;
            }

            var renderers = this.statics().Renderer;
            switch (renderer) {
                case 'component':
                    return renderers.Component;
                case 'data':
                    return renderers.Data;
                default:
                    return Ext.ElementLoader.Renderer.Html;
            }
        }
    });