/*
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
*/
(function(){

var EXTUTIL = Ext.util,
    EACH = Ext.each,
    TRUE = true,
    FALSE = false;
/**
 * @class Ext.util.Observable
 * Base class that provides a common interface for publishing events. Subclasses are expected to
 * to have a property "events" with all the events defined, and, optionally, a property "listeners"
 * with configured listeners defined.<br>
 * For example:
 * <pre><code>
Employee = Ext.extend(Ext.util.Observable, {
    constructor: function(config){
        this.name = config.name;
        this.addEvents({
            "fired" : true,
            "quit" : true
        });

        // Copy configured listeners into *this* object so that the base class&#39;s
        // constructor will add them.
        this.listeners = config.listeners;

        // Call our superclass constructor to complete construction process.
        Employee.superclass.constructor.call(this, config)
    }
});
</code></pre>
 * This could then be used like this:<pre><code>
var newEmployee = new Employee({
    name: employeeName,
    listeners: {
        quit: function() {
            // By default, "this" will be the object that fired the event.
            alert(this.name + " has quit!");
        }
    }
});
</code></pre>
 */
EXTUTIL.Observable = function(){
    /**
     * @cfg {Object} listeners (optional) <p>A config object containing one or more event handlers to be added to this
     * object during initialization.  This should be a valid listeners config object as specified in the
     * {@link #addListener} example for attaching multiple handlers at once.</p>
     * <br><p><b><u>DOM events from ExtJs {@link Ext.Component Components}</u></b></p>
     * <br><p>While <i>some</i> ExtJs Component classes export selected DOM events (e.g. "click", "mouseover" etc), this
     * is usually only done when extra value can be added. For example the {@link Ext.DataView DataView}'s
     * <b><code>{@link Ext.DataView#click click}</code></b> event passing the node clicked on. To access DOM
     * events directly from a Component's HTMLElement, listeners must be added to the <i>{@link Ext.Component#getEl Element}</i> after the Component
     * has been rendered. A plugin can simplify this step:<pre><code>
// Plugin is configured with a listeners config object.
// The Component is appended to the argument list of all handler functions.
Ext.DomObserver = Ext.extend(Object, {
    constructor: function(config) {
        this.listeners = config.listeners ? config.listeners : config;
    },

    // Component passes itself into plugin&#39;s init method
    init: function(c) {
        var p, l = this.listeners;
        for (p in l) {
            if (Ext.isFunction(l[p])) {
                l[p] = this.createHandler(l[p], c);
            } else {
                l[p].fn = this.createHandler(l[p].fn, c);
            }
        }

        // Add the listeners to the Element immediately following the render call
        c.render = c.render.{@link Function#createSequence createSequence}(function() {
            var e = c.getEl();
            if (e) {
                e.on(l);
            }
        });
    },

    createHandler: function(fn, c) {
        return function(e) {
            fn.call(this, e, c);
        };
    }
});

var combo = new Ext.form.ComboBox({

    // Collapse combo when its element is clicked on
    plugins: [ new Ext.DomObserver({
        click: function(evt, comp) {
            comp.collapse();
        }
    })],
    store: myStore,
    typeAhead: true,
    mode: 'local',
    triggerAction: 'all'
});
     * </code></pre></p>
     */
    var me = this, e = me.events;
    if(me.listeners){
        me.on(me.listeners);
        delete me.listeners;
    }
    me.events = e || {};
};

EXTUTIL.Observable.prototype = {
    // private
    filterOptRe : /^(?:scope|delay|buffer|single)$/,

    /**
     * <p>Fires the specified event with the passed parameters (minus the event name).</p>
     * <p>An event may be set to bubble up an Observable parent hierarchy (See {@link Ext.Component#getBubbleTarget})
     * by calling {@link #enableBubble}.</p>
     * @param {String} eventName The name of the event to fire.
     * @param {Object...} args Variable number of parameters are passed to handlers.
     * @return {Boolean} returns false if any of the handlers return false otherwise it returns true.
     */
    fireEvent : function(){
        var a = Array.prototype.slice.call(arguments, 0),
            ename = a[0].toLowerCase(),
            me = this,
            ret = TRUE,
            ce = me.events[ename],
            cc,
            q,
            c;
        if (me.eventsSuspended === TRUE) {
            if (q = me.eventQueue) {
                q.push(a);
            }
        }
        else if(typeof ce == 'object') {
            if (ce.bubble){
                if(ce.fire.apply(ce, a.slice(1)) === FALSE) {
                    return FALSE;
                }
                c = me.getBubbleTarget && me.getBubbleTarget();
                if(c && c.enableBubble) {
                    cc = c.events[ename];
                    if(!cc || typeof cc != 'object' || !cc.bubble) {
                        c.enableBubble(ename);
                    }
                    return c.fireEvent.apply(c, a);
                }
            }
            else {
                a.shift();
                ret = ce.fire.apply(ce, a);
            }
        }
        return ret;
    },

    /**
     * Appends an event handler to this object.
     * @param {String}   eventName The name of the event to listen for.
     * @param {Function} handler The method the event invokes.
     * @param {Object}   scope (optional) The scope (<code><b>this</b></code> reference) in which the handler function is executed.
     * <b>If omitted, defaults to the object which fired the event.</b>
     * @param {Object}   options (optional) An object containing handler configuration.
     * properties. This may contain any of the following properties:<ul>
     * <li><b>scope</b> : Object<div class="sub-desc">The scope (<code><b>this</b></code> reference) in which the handler function is executed.
     * <b>If omitted, defaults to the object which fired the event.</b></div></li>
     * <li><b>delay</b> : Number<div class="sub-desc">The number of milliseconds to delay the invocation of the handler after the event fires.</div></li>
     * <li><b>single</b> : Boolean<div class="sub-desc">True to add a handler to handle just the next firing of the event, and then remove itself.</div></li>
     * <li><b>buffer</b> : Number<div class="sub-desc">Causes the handler to be scheduled to run in an {@link Ext.util.DelayedTask} delayed
     * by the specified number of milliseconds. If the event fires again within that time, the original
     * handler is <em>not</em> invoked, but the new handler is scheduled in its place.</div></li>
     * <li><b>target</b> : Observable<div class="sub-desc">Only call the handler if the event was fired on the target Observable, <i>not</i>
     * if the event was bubbled up from a child Observable.</div></li>
     * </ul><br>
     * <p>
     * <b>Combining Options</b><br>
     * Using the options argument, it is possible to combine different types of listeners:<br>
     * <br>
     * A delayed, one-time listener.
     * <pre><code>
myDataView.on('click', this.onClick, this, {
single: true,
delay: 100
});</code></pre>
     * <p>
     * <b>Attaching multiple handlers in 1 call</b><br>
     * The method also allows for a single argument to be passed which is a config object containing properties
     * which specify multiple handlers.
     * <p>
     * <pre><code>
myGridPanel.on({
'click' : {
    fn: this.onClick,
    scope: this,
    delay: 100
},
'mouseover' : {
    fn: this.onMouseOver,
    scope: this
},
'mouseout' : {
    fn: this.onMouseOut,
    scope: this
}
});</code></pre>
 * <p>
 * Or a shorthand syntax:<br>
 * <pre><code>
myGridPanel.on({
'click' : this.onClick,
'mouseover' : this.onMouseOver,
'mouseout' : this.onMouseOut,
 scope: this
});</code></pre>
     */
    addListener : function(eventName, fn, scope, o){
        var me = this,
            e,
            oe,
            ce;
            
        if (typeof eventName == 'object') {
            o = eventName;
            for (e in o) {
                oe = o[e];
                if (!me.filterOptRe.test(e)) {
                    me.addListener(e, oe.fn || oe, oe.scope || o.scope, oe.fn ? oe : o);
                }
            }
        } else {
            eventName = eventName.toLowerCase();
            ce = me.events[eventName] || TRUE;
            if (typeof ce == 'boolean') {
                me.events[eventName] = ce = new EXTUTIL.Event(me, eventName);
            }
            ce.addListener(fn, scope, typeof o == 'object' ? o : {});
        }
    },

    /**
     * Removes an event handler.
     * @param {String}   eventName The type of event the handler was associated with.
     * @param {Function} handler   The handler to remove. <b>This must be a reference to the function passed into the {@link #addListener} call.</b>
     * @param {Object}   scope     (optional) The scope originally specified for the handler.
     */
    removeListener : function(eventName, fn, scope){
        var ce = this.events[eventName.toLowerCase()];
        if (typeof ce == 'object') {
            ce.removeListener(fn, scope);
        }
    },

    /**
     * Removes all listeners for this object
     */
    purgeListeners : function(){
        var events = this.events,
            evt,
            key;
        for(key in events){
            evt = events[key];
            if(typeof evt == 'object'){
                evt.clearListeners();
            }
        }
    },

    /**
     * Adds the specified events to the list of events which this Observable may fire.
     * @param {Object|String} o Either an object with event names as properties with a value of <code>true</code>
     * or the first event name string if multiple event names are being passed as separate parameters.
     * @param {string} Optional. Event name if multiple event names are being passed as separate parameters.
     * Usage:<pre><code>
this.addEvents('storeloaded', 'storecleared');
</code></pre>
     */
    addEvents : function(o){
        var me = this;
        me.events = me.events || {};
        if (typeof o == 'string') {
            var a = arguments,
                i = a.length;
            while(i--) {
                me.events[a[i]] = me.events[a[i]] || TRUE;
            }
        } else {
            Ext.applyIf(me.events, o);
        }
    },

    /**
     * Checks to see if this object has any listeners for a specified event
     * @param {String} eventName The name of the event to check for
     * @return {Boolean} True if the event is being listened for, else false
     */
    hasListener : function(eventName){
        var e = this.events[eventName.toLowerCase()];
        return typeof e == 'object' && e.listeners.length > 0;
    },

    /**
     * Suspend the firing of all events. (see {@link #resumeEvents})
     * @param {Boolean} queueSuspended Pass as true to queue up suspended events to be fired
     * after the {@link #resumeEvents} call instead of discarding all suspended events;
     */
    suspendEvents : function(queueSuspended){
        this.eventsSuspended = TRUE;
        if(queueSuspended && !this.eventQueue){
            this.eventQueue = [];
        }
    },

    /**
     * Resume firing events. (see {@link #suspendEvents})
     * If events were suspended using the <tt><b>queueSuspended</b></tt> parameter, then all
     * events fired during event suspension will be sent to any listeners now.
     */
    resumeEvents : function(){
        var me = this,
            queued = me.eventQueue || [];
        me.eventsSuspended = FALSE;
        delete me.eventQueue;
        EACH(queued, function(e) {
            me.fireEvent.apply(me, e);
        });
    }
};

var OBSERVABLE = EXTUTIL.Observable.prototype;
/**
 * Appends an event handler to this object (shorthand for {@link #addListener}.)
 * @param {String}   eventName     The type of event to listen for
 * @param {Function} handler       The method the event invokes
 * @param {Object}   scope         (optional) The scope (<code><b>this</b></code> reference) in which the handler function is executed.
 * <b>If omitted, defaults to the object which fired the event.</b>
 * @param {Object}   options       (optional) An object containing handler configuration.
 * @method
 */
OBSERVABLE.on = OBSERVABLE.addListener;
/**
 * Removes an event handler (shorthand for {@link #removeListener}.)
 * @param {String}   eventName     The type of event the handler was associated with.
 * @param {Function} handler       The handler to remove. <b>This must be a reference to the function passed into the {@link #addListener} call.</b>
 * @param {Object}   scope         (optional) The scope originally specified for the handler.
 * @method
 */
OBSERVABLE.un = OBSERVABLE.removeListener;

/**
 * Removes <b>all</b> added captures from the Observable.
 * @param {Observable} o The Observable to release
 * @static
 */
EXTUTIL.Observable.releaseCapture = function(o){
    o.fireEvent = OBSERVABLE.fireEvent;
};

function createTargeted(h, o, scope){
    return function(){
        if(o.target == arguments[0]){
            h.apply(scope, Array.prototype.slice.call(arguments, 0));
        }
    };
};

function createBuffered(h, o, l, scope){
    l.task = new EXTUTIL.DelayedTask();
    return function(){
        l.task.delay(o.buffer, h, scope, Array.prototype.slice.call(arguments, 0));
    };
};

function createSingle(h, e, fn, scope){
    return function(){
        e.removeListener(fn, scope);
        return h.apply(scope, arguments);
    };
};

function createDelayed(h, o, l, scope){
    return function(){
        var task = new EXTUTIL.DelayedTask(),
            args = Array.prototype.slice.call(arguments, 0);
        if(!l.tasks) {
            l.tasks = [];
        }
        l.tasks.push(task);
        task.delay(o.delay || 10, function(){
            l.tasks.remove(task);
            h.apply(scope, args);
        }, scope);
    };
};

EXTUTIL.Event = function(obj, name){
    this.name = name;
    this.obj = obj;
    this.listeners = [];
};

EXTUTIL.Event.prototype = {
    addListener : function(fn, scope, options){
        var me = this,
            l;
        scope = scope || me.obj;
        if(!me.isListening(fn, scope)){
            l = me.createListener(fn, scope, options);
            if(me.firing){ // if we are currently firing this event, don't disturb the listener loop
                me.listeners = me.listeners.slice(0);
            }
            me.listeners.push(l);
        }
    },

    createListener: function(fn, scope, o){
        o = o || {};
        scope = scope || this.obj;
        var l = {
            fn: fn,
            scope: scope,
            options: o
        }, h = fn;
        if(o.target){
            h = createTargeted(h, o, scope);
        }
        if(o.delay){
            h = createDelayed(h, o, l, scope);
        }
        if(o.single){
            h = createSingle(h, this, fn, scope);
        }
        if(o.buffer){
            h = createBuffered(h, o, l, scope);
        }
        l.fireFn = h;
        return l;
    },

    findListener : function(fn, scope){
        var list = this.listeners,
            i = list.length,
            l;

        scope = scope || this.obj;
        while(i--){
            l = list[i];
            if(l){
                if(l.fn == fn && l.scope == scope){
                    return i;
                }
            }
        }
        return -1;
    },

    isListening : function(fn, scope){
        return this.findListener(fn, scope) != -1;
    },

    removeListener : function(fn, scope){
        var index,
            l,
            k,
            me = this,
            ret = FALSE;
        if((index = me.findListener(fn, scope)) != -1){
            if (me.firing) {
                me.listeners = me.listeners.slice(0);
            }
            l = me.listeners[index];
            if(l.task) {
                l.task.cancel();
                delete l.task;
            }
            k = l.tasks && l.tasks.length;
            if(k) {
                while(k--) {
                    l.tasks[k].cancel();
                }
                delete l.tasks;
            }
            me.listeners.splice(index, 1);
            ret = TRUE;
        }
        return ret;
    },

    // Iterate to stop any buffered/delayed events
    clearListeners : function(){
        var me = this,
            l = me.listeners,
            i = l.length;
        while(i--) {
            me.removeListener(l[i].fn, l[i].scope);
        }
    },

    fire : function(){
        var me = this,
            listeners = me.listeners,
            len = listeners.length,
            i = 0,
            l;

        if(len > 0){
            me.firing = TRUE;
            var args = Array.prototype.slice.call(arguments, 0);
            for (; i < len; i++) {
                l = listeners[i];
                if(l && l.fireFn.apply(l.scope || me.obj || window, args) === FALSE) {
                    return (me.firing = FALSE);
                }
            }
        }
        me.firing = FALSE;
        return TRUE;
    }

};
})();
