/*
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.EventManager
 * Registers event handlers that want to receive a normalized EventObject instead of the standard browser event and provides
 * several useful events directly.
 * See {@link Ext.EventObject} for more details on normalized event objects.
 * @singleton
 */
Ext.EventManager = function(){
    var docReadyEvent,
        docReadyProcId,
        docReadyState = false,
        DETECT_NATIVE = Ext.isGecko || Ext.isWebKit || Ext.isSafari || Ext.isIE10p,
        E = Ext.lib.Event,
        D = Ext.lib.Dom,
        DOC = document,
        WINDOW = window,
        DOMCONTENTLOADED = "DOMContentLoaded",
        COMPLETE = 'complete',
        propRe = /^(?:scope|delay|buffer|single|stopEvent|preventDefault|stopPropagation|normalized|args|delegate)$/,
        /*
         * This cache is used to hold special js objects, the document and window, that don't have an id. We need to keep
         * a reference to them so we can look them up at a later point.
         */
        specialElCache = [];

     function getId(el){
        var id = false,
            i = 0,
            len = specialElCache.length,
            skip = false,
            o;

        if (el) {
            if (el.getElementById || el.navigator) {
                // look up the id
                for(; i < len; ++i){
                    o = specialElCache[i];
                    if(o.el === el){
                        id = o.id;
                        break;
                    }
                }
                if(!id){
                    // for browsers that support it, ensure that give the el the same id
                    id = Ext.id(el);
                    specialElCache.push({
                        id: id,
                        el: el
                    });
                    skip = true;
                }
            }else{
                id = Ext.id(el);
            }
            if(!Ext.elCache[id]){
                Ext.Element.addToCache(new Ext.Element(el), id);
                if(skip){
                    Ext.elCache[id].skipGC = true;
                }
            }
        }
        return id;
     }

    /// There is some jquery work around stuff here that isn't needed in Ext Core.
    function addListener(el, ename, fn, task, wrap, scope){
        el = Ext.getDom(el);
        var id = getId(el),
            es = Ext.elCache[id].events,
            wfn;

        wfn = E.on(el, ename, wrap);
        es[ename] = es[ename] || [];

        /* 0 = Original Function,
           1 = Event Manager Wrapped Function,
           2 = Scope,
           3 = Adapter Wrapped Function,
           4 = Buffered Task
        */
        es[ename].push([fn, wrap, scope, wfn, task]);

        // this is a workaround for jQuery and should somehow be removed from Ext Core in the future
        // without breaking ExtJS.

        // workaround for jQuery
        if(el.addEventListener && ename == "mousewheel"){
            var args = ["DOMMouseScroll", wrap, false];
            el.addEventListener.apply(el, args);
            Ext.EventManager.addListener(WINDOW, 'unload', function(){
                el.removeEventListener.apply(el, args);
            });
        }

        // fix stopped mousedowns on the document
        if(el == DOC && ename == "mousedown"){
            Ext.EventManager.stoppedMouseDownEvent.addListener(wrap);
        }
    }

    function doScrollChk(){
        /* Notes:
             'doScroll' will NOT work in a IFRAME/FRAMESET.
             The method succeeds but, a DOM query done immediately after -- FAILS.
          */
        if(window != top){
            return false;
        }

        try{
            DOC.documentElement.doScroll('left');
        }catch(e){
             return false;
        }

        fireDocReady();
        return true;
    }
    /**
     * @return {Boolean} True if the document is in a 'complete' state (or was determined to
     * be true by other means). If false, the state is evaluated again until canceled.
     */
    function checkReadyState(e){

        if(Ext.isIE9m && doScrollChk()){
            return true;
        }
        if(DOC.readyState == COMPLETE){
            fireDocReady();
            return true;
        }
        docReadyState || (docReadyProcId = setTimeout(arguments.callee, 2));
        return false;
    }

    var styles;
    function checkStyleSheets(e){
        styles || (styles = Ext.query('style, link[rel=stylesheet]'));
        if(styles.length == DOC.styleSheets.length){
            fireDocReady();
            return true;
        }
        docReadyState || (docReadyProcId = setTimeout(arguments.callee, 2));
        return false;
    }

    function OperaDOMContentLoaded(e){
        DOC.removeEventListener(DOMCONTENTLOADED, arguments.callee, false);
        checkStyleSheets();
    }

    function fireDocReady(e){
        if(!docReadyState){
            docReadyState = true; //only attempt listener removal once

            if(docReadyProcId){
                clearTimeout(docReadyProcId);
            }
            if(DETECT_NATIVE) {
                DOC.removeEventListener(DOMCONTENTLOADED, fireDocReady, false);
            }
            if(Ext.isIE9m && checkReadyState.bindIE){  //was this was actually set ??
                DOC.detachEvent('onreadystatechange', checkReadyState);
            }
            E.un(WINDOW, "load", arguments.callee);
        }
        if(docReadyEvent && !Ext.isReady){
            Ext.isReady = true;
            docReadyEvent.fire();
            docReadyEvent.listeners = [];
        }

    }

    function initDocReady(){
        docReadyEvent || (docReadyEvent = new Ext.util.Event());
        if (DETECT_NATIVE) {
            DOC.addEventListener(DOMCONTENTLOADED, fireDocReady, false);
        }
        /*
         * Handle additional (exceptional) detection strategies here
         */
        if (Ext.isIE9m){
            //Use readystatechange as a backup AND primary detection mechanism for a FRAME/IFRAME
            //See if page is already loaded
            if(!checkReadyState()){
                checkReadyState.bindIE = true;
                DOC.attachEvent('onreadystatechange', checkReadyState);
            }

        }else if(Ext.isOpera ){
            /* Notes:
               Opera needs special treatment needed here because CSS rules are NOT QUITE
               available after DOMContentLoaded is raised.
            */

            //See if page is already loaded and all styleSheets are in place
            (DOC.readyState == COMPLETE && checkStyleSheets()) ||
                DOC.addEventListener(DOMCONTENTLOADED, OperaDOMContentLoaded, false);

        }else if (Ext.isWebKit){
            //Fallback for older Webkits without DOMCONTENTLOADED support
            checkReadyState();
        }
        // no matter what, make sure it fires on load
        E.on(WINDOW, "load", fireDocReady);
    }

    function createTargeted(h, o){
        return function(){
            var args = Ext.toArray(arguments);
            if(o.target == Ext.EventObject.setEvent(args[0]).target){
                h.apply(this, args);
            }
        };
    }

    function createBuffered(h, o, task){
        return function(e){
            // create new event object impl so new events don't wipe out properties
            task.delay(o.buffer, h, null, [new Ext.EventObjectImpl(e)]);
        };
    }

    function createSingle(h, el, ename, fn, scope){
        return function(e){
            Ext.EventManager.removeListener(el, ename, fn, scope);
            h(e);
        };
    }

    function createDelayed(h, o, fn){
        return function(e){
            var task = new Ext.util.DelayedTask(h);
            if(!fn.tasks) {
                fn.tasks = [];
            }
            fn.tasks.push(task);
            task.delay(o.delay || 10, h, null, [new Ext.EventObjectImpl(e)]);
        };
    }

    function listen(element, ename, opt, fn, scope){
        var o = (!opt || typeof opt == "boolean") ? {} : opt,
            el = Ext.getDom(element), task;

        fn = fn || o.fn;
        scope = scope || o.scope;

        if(!el){
            throw "Error listening for \"" + ename + '\". Element "' + element + '" doesn\'t exist.';
        }
        function h(e){
            // prevent errors while unload occurring
            if(!Ext){// !window[xname]){  ==> can't we do this?
                return;
            }
            e = Ext.EventObject.setEvent(e);
            var t;
            if (o.delegate) {
                if(!(t = e.getTarget(o.delegate, el))){
                    return;
                }
            } else {
                t = e.target;
            }
            if (o.stopEvent) {
                e.stopEvent();
            }
            if (o.preventDefault) {
               e.preventDefault();
            }
            if (o.stopPropagation) {
                e.stopPropagation();
            }
            if (o.normalized === false) {
                e = e.browserEvent;
            }

            fn.call(scope || el, e, t, o);
        }
        if(o.target){
            h = createTargeted(h, o);
        }
        if(o.delay){
            h = createDelayed(h, o, fn);
        }
        if(o.single){
            h = createSingle(h, el, ename, fn, scope);
        }
        if(o.buffer){
            task = new Ext.util.DelayedTask(h);
            h = createBuffered(h, o, task);
        }

        addListener(el, ename, fn, task, h, scope);
        return h;
    }

    var pub = {
        /**
         * Appends an event handler to an element.  The shorthand version {@link #on} is equivalent.  Typically you will
         * use {@link Ext.Element#addListener} directly on an Element in favor of calling this version.
         * @param {String/HTMLElement} el The html element or id to assign the event handler to.
         * @param {String} eventName The name of the event to listen for.
         * @param {Function} handler The handler function the event invokes. This function is passed
         * the following parameters:<ul>
         * <li>evt : EventObject<div class="sub-desc">The {@link Ext.EventObject EventObject} describing the event.</div></li>
         * <li>t : Element<div class="sub-desc">The {@link Ext.Element Element} which was the target of the event.
         * Note that this may be filtered by using the <tt>delegate</tt> option.</div></li>
         * <li>o : Object<div class="sub-desc">The options object from the addListener call.</div></li>
         * </ul>
         * @param {Object} scope (optional) The scope (<b><code>this</code></b> reference) in which the handler function is executed. <b>Defaults to the Element</b>.
         * @param {Object} options (optional) An object containing handler configuration properties.
         * This may contain any of the following properties:<ul>
         * <li>scope : Object<div class="sub-desc">The scope (<b><code>this</code></b> reference) in which the handler function is executed. <b>Defaults to the Element</b>.</div></li>
         * <li>delegate : String<div class="sub-desc">A simple selector to filter the target or look for a descendant of the target</div></li>
         * <li>stopEvent : Boolean<div class="sub-desc">True to stop the event. That is stop propagation, and prevent the default action.</div></li>
         * <li>preventDefault : Boolean<div class="sub-desc">True to prevent the default action</div></li>
         * <li>stopPropagation : Boolean<div class="sub-desc">True to prevent event propagation</div></li>
         * <li>normalized : Boolean<div class="sub-desc">False to pass a browser event to the handler function instead of an Ext.EventObject</div></li>
         * <li>delay : Number<div class="sub-desc">The number of milliseconds to delay the invocation of the handler after te event fires.</div></li>
         * <li>single : 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>buffer : 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>target : Element<div class="sub-desc">Only call the handler if the event was fired on the target Element, <i>not</i> if the event was bubbled up from a child node.</div></li>
         * </ul><br>
         * <p>See {@link Ext.Element#addListener} for examples of how to use these options.</p>
         */
        addListener : function(element, eventName, fn, scope, options){
            if(typeof eventName == 'object'){
                var o = eventName, e, val;
                for(e in o){
                    val = o[e];
                    if(!propRe.test(e)){
                        if(Ext.isFunction(val)){
                            // shared options
                            listen(element, e, o, val, o.scope);
                        }else{
                            // individual options
                            listen(element, e, val);
                        }
                    }
                }
            } else {
                listen(element, eventName, options, fn, scope);
            }
        },

        /**
         * Removes an event handler from an element.  The shorthand version {@link #un} is equivalent.  Typically
         * you will use {@link Ext.Element#removeListener} directly on an Element in favor of calling this version.
         * @param {String/HTMLElement} el The id or html element from which to remove the listener.
         * @param {String} eventName The name of the event.
         * @param {Function} fn The handler function to remove. <b>This must be a reference to the function passed into the {@link #addListener} call.</b>
         * @param {Object} scope If a scope (<b><code>this</code></b> reference) was specified when the listener was added,
         * then this must refer to the same object.
         */
        removeListener : function(el, eventName, fn, scope){
            el = Ext.getDom(el);
            var id = getId(el),
                f = el && (Ext.elCache[id].events)[eventName] || [],
                wrap, i, l, k, len, fnc;

            for (i = 0, len = f.length; i < len; i++) {

                /* 0 = Original Function,
                   1 = Event Manager Wrapped Function,
                   2 = Scope,
                   3 = Adapter Wrapped Function,
                   4 = Buffered Task
                */
                if (Ext.isArray(fnc = f[i]) && fnc[0] == fn && (!scope || fnc[2] == scope)) {
                    if(fnc[4]) {
                        fnc[4].cancel();
                    }
                    k = fn.tasks && fn.tasks.length;
                    if(k) {
                        while(k--) {
                            fn.tasks[k].cancel();
                        }
                        delete fn.tasks;
                    }
                    wrap = fnc[1];
                    E.un(el, eventName, E.extAdapter ? fnc[3] : wrap);

                    // jQuery workaround that should be removed from Ext Core
                    if(wrap && el.addEventListener && eventName == "mousewheel"){
                        el.removeEventListener("DOMMouseScroll", wrap, false);
                    }

                    // fix stopped mousedowns on the document
                    if(wrap && el == DOC && eventName == "mousedown"){
                        Ext.EventManager.stoppedMouseDownEvent.removeListener(wrap);
                    }

                    f.splice(i, 1);
                    if (f.length === 0) {
                        delete Ext.elCache[id].events[eventName];
                    }
                    for (k in Ext.elCache[id].events) {
                        return false;
                    }
                    Ext.elCache[id].events = {};
                    return false;
                }
            }
        },

        /**
         * Removes all event handers from an element.  Typically you will use {@link Ext.Element#removeAllListeners}
         * directly on an Element in favor of calling this version.
         * @param {String/HTMLElement} el The id or html element from which to remove all event handlers.
         */
        removeAll : function(el){
            el = Ext.getDom(el);
            var id = getId(el),
                ec = Ext.elCache[id] || {},
                es = ec.events || {},
                f, i, len, ename, fn, k, wrap;

            for(ename in es){
                if(es.hasOwnProperty(ename)){
                    f = es[ename];
                    /* 0 = Original Function,
                       1 = Event Manager Wrapped Function,
                       2 = Scope,
                       3 = Adapter Wrapped Function,
                       4 = Buffered Task
                    */
                    for (i = 0, len = f.length; i < len; i++) {
                        fn = f[i];
                        if(fn[4]) {
                            fn[4].cancel();
                        }
                        if(fn[0].tasks && (k = fn[0].tasks.length)) {
                            while(k--) {
                                fn[0].tasks[k].cancel();
                            }
                            delete fn.tasks;
                        }
                        wrap =  fn[1];
                        E.un(el, ename, E.extAdapter ? fn[3] : wrap);

                        // jQuery workaround that should be removed from Ext Core
                        if(el.addEventListener && wrap && ename == "mousewheel"){
                            el.removeEventListener("DOMMouseScroll", wrap, false);
                        }

                        // fix stopped mousedowns on the document
                        if(wrap && el == DOC &&  ename == "mousedown"){
                            Ext.EventManager.stoppedMouseDownEvent.removeListener(wrap);
                        }
                    }
                }
            }
            if (Ext.elCache[id]) {
                Ext.elCache[id].events = {};
            }
        },

        getListeners : function(el, eventName) {
            el = Ext.getDom(el);
            var id = getId(el),
                ec = Ext.elCache[id] || {},
                es = ec.events || {},
                results = [];
            if (es && es[eventName]) {
                return es[eventName];
            } else {
                return null;
            }
        },
        
        removeFromSpecialCache: function(o) {
            var i = 0,
                len = specialElCache.length;
                
            for (; i < len; ++i) {
                if (specialElCache[i].el == o) {
                    specialElCache.splice(i, 1); 
                }
            }
        },

        purgeElement : function(el, recurse, eventName) {
            el = Ext.getDom(el);
            var id = getId(el),
                ec = Ext.elCache[id] || {},
                es = ec.events || {},
                i, f, len;
            if (eventName) {
                if (es && es.hasOwnProperty(eventName)) {
                    f = es[eventName];
                    for (i = 0, len = f.length; i < len; i++) {
                        Ext.EventManager.removeListener(el, eventName, f[i][0]);
                    }
                }
            } else {
                Ext.EventManager.removeAll(el);
            }
            if (recurse && el && el.childNodes) {
                for (i = 0, len = el.childNodes.length; i < len; i++) {
                    Ext.EventManager.purgeElement(el.childNodes[i], recurse, eventName);
                }
            }
        },

        _unload : function() {
            var el;
            for (el in Ext.elCache) {
                Ext.EventManager.removeAll(el);
            }
            delete Ext.elCache;
            delete Ext.Element._flyweights;

            // Abort any outstanding Ajax requests
            var c,
                conn,
                tid,
                ajax = Ext.lib.Ajax;
            (typeof ajax.conn == 'object') ? conn = ajax.conn : conn = {};
            for (tid in conn) {
                c = conn[tid];
                if (c) {
                    ajax.abort({conn: c, tId: tid});
                }
            }
        },
        /**
         * Adds a listener to be notified when the document is ready (before onload and before images are loaded). Can be
         * accessed shorthanded as Ext.onReady().
         * @param {Function} fn The method the event invokes.
         * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the handler function executes. Defaults to the browser window.
         * @param {boolean} options (optional) Options object as passed to {@link Ext.Element#addListener}. It is recommended that the options
         * <code>{single: true}</code> be used so that the handler is removed on first invocation.
         */
        onDocumentReady : function(fn, scope, options){
            if (Ext.isReady) { // if it already fired or document.body is present
                docReadyEvent || (docReadyEvent = new Ext.util.Event());
                docReadyEvent.addListener(fn, scope, options);
                docReadyEvent.fire();
                docReadyEvent.listeners = [];
            } else {
                if (!docReadyEvent) {
                    initDocReady();
                }
                options = options || {};
                options.delay = options.delay || 1;
                docReadyEvent.addListener(fn, scope, options);
            }
        },

        /**
         * Forces a document ready state transition for the framework.  Used when Ext is loaded
         * into a DOM structure AFTER initial page load (Google API or other dynamic load scenario.
         * Any pending 'onDocumentReady' handlers will be fired (if not already handled).
         */
        fireDocReady  : fireDocReady
    };
     /**
     * Appends an event handler to an element.  Shorthand for {@link #addListener}.
     * @param {String/HTMLElement} el The html element or id to assign the event handler to
     * @param {String} eventName The name of the event to listen for.
     * @param {Function} handler The handler function the event invokes.
     * @param {Object} scope (optional) (<code>this</code> reference) in which the handler function executes. <b>Defaults to the Element</b>.
     * @param {Object} options (optional) An object containing standard {@link #addListener} options
     * @member Ext.EventManager
     * @method on
     */
    pub.on = pub.addListener;
    /**
     * Removes an event handler from an element.  Shorthand for {@link #removeListener}.
     * @param {String/HTMLElement} el The id or html element from which to remove the listener.
     * @param {String} eventName The name of the event.
     * @param {Function} fn The handler function to remove. <b>This must be a reference to the function passed into the {@link #on} call.</b>
     * @param {Object} scope If a scope (<b><code>this</code></b> reference) was specified when the listener was added,
     * then this must refer to the same object.
     * @member Ext.EventManager
     * @method un
     */
    pub.un = pub.removeListener;

    pub.stoppedMouseDownEvent = new Ext.util.Event();
    return pub;
}();
/**
  * Adds a listener to be notified when the document is ready (before onload and before images are loaded). Shorthand of {@link Ext.EventManager#onDocumentReady}.
  * @param {Function} fn The method the event invokes.
  * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the handler function executes. Defaults to the browser window.
  * @param {boolean} options (optional) Options object as passed to {@link Ext.Element#addListener}. It is recommended that the options
  * <code>{single: true}</code> be used so that the handler is removed on first invocation.
  * @member Ext
  * @method onReady
 */
Ext.onReady = Ext.EventManager.onDocumentReady;


//Initialize doc classes
(function(){
    var initExtCss = function() {
        // find the body element
        var bd = document.body || document.getElementsByTagName('body')[0];
        if (!bd) {
            return false;
        }

        var cls = [];
        
        if (Ext.isIE) {
            // Only treat IE9 and less like IE in the css
            if (!Ext.isIE10p) {
                cls.push('ext-ie');
            }
            if (Ext.isIE6) {
                cls.push('ext-ie6');
            } else if (Ext.isIE7) {
                cls.push('ext-ie7', 'ext-ie7m');
            } else if (Ext.isIE8) {
                cls.push('ext-ie8', 'ext-ie8m');
            } else if (Ext.isIE9) {
                cls.push('ext-ie9', 'ext-ie9m');
            } else if (Ext.isIE10) {
                cls.push('ext-ie10');
            }
        }
        
        if (Ext.isGecko) {
            if (Ext.isGecko2) {
                cls.push('ext-gecko2');
            } else {
                cls.push('ext-gecko3');
            }
        }
        
        if (Ext.isOpera) {
            cls.push('ext-opera');
        }
        
        if (Ext.isWebKit) {
            cls.push('ext-webkit');
        }

        if (Ext.isSafari) {
            cls.push("ext-safari " + (Ext.isSafari2 ? 'ext-safari2' : (Ext.isSafari3 ? 'ext-safari3' : 'ext-safari4')));
        } else if(Ext.isChrome) {
            cls.push("ext-chrome");
        }

        if (Ext.isMac) {
            cls.push("ext-mac");
        }
        if (Ext.isLinux) {
            cls.push("ext-linux");
        }

        // add to the parent to allow for selectors like ".ext-strict .ext-ie"
        if (Ext.isStrict || Ext.isBorderBox) {
            var p = bd.parentNode;
            if (p) {
                if (!Ext.isStrict) {
                    Ext.fly(p, '_internal').addClass('x-quirks');
                    if (Ext.isIE9m && !Ext.isStrict) {
                        Ext.isIEQuirks = true;
                    }
                }
                Ext.fly(p, '_internal').addClass(((Ext.isStrict && Ext.isIE ) || (!Ext.enableForcedBoxModel && !Ext.isIE)) ? ' ext-strict' : ' ext-border-box');
            }
        }
        // Forced border box model class applied to all elements. Bypassing javascript based box model adjustments
        // in favor of css.  This is for non-IE browsers.
        if (Ext.enableForcedBoxModel && !Ext.isIE) {
            Ext.isForcedBorderBox = true;
            cls.push("ext-forced-border-box");
        }

        Ext.fly(bd, '_internal').addClass(cls);
        return true;
    };

    if (!initExtCss()) {
        Ext.onReady(initExtCss);
    }
})();

// Code used to detect certain browser feature/quirks/bugs at startup.
(function(){
    /**
     * @class Ext.supports
     * @ignore
     */
    var supports = Ext.apply(Ext.supports, {
        /**
         * In Webkit, there is an issue with getting the margin right property, see
         * https://bugs.webkit.org/show_bug.cgi?id=13343
         */
        correctRightMargin: true,

        /**
         * Webkit browsers return rgba(0, 0, 0) when a transparent color is used
         */
        correctTransparentColor: true,

        /**
         * IE uses styleFloat, not cssFloat for the float property.
         */
        cssFloat: true
    });

    var supportTests = function(){
            var div = document.createElement('div'),
                doc = document,
                view,
                last;

            div.innerHTML = '<div style="height:30px;width:50px;"><div style="height:20px;width:20px;"></div></div><div style="float:left;background-color:transparent;">';
            doc.body.appendChild(div);
            last = div.lastChild;

            if((view = doc.defaultView)){
                if(view.getComputedStyle(div.firstChild.firstChild, null).marginRight != '0px'){
                    supports.correctRightMargin = false;
                }
                if(view.getComputedStyle(last, null).backgroundColor != 'transparent'){
                    supports.correctTransparentColor = false;
                }
            }
            supports.cssFloat = !!last.style.cssFloat;
            doc.body.removeChild(div);
    };

    if (Ext.isReady) {
        supportTests();
    } else {
        Ext.onReady(supportTests);
    }
})();


/**
 * @class Ext.EventObject
 * Just as {@link Ext.Element} wraps around a native DOM node, Ext.EventObject
 * wraps the browser's native event-object normalizing cross-browser differences,
 * such as which mouse button is clicked, keys pressed, mechanisms to stop
 * event-propagation along with a method to prevent default actions from taking place.
 * <p>For example:</p>
 * <pre><code>
function handleClick(e, t){ // e is not a standard event object, it is a Ext.EventObject
    e.preventDefault();
    var target = e.getTarget(); // same as t (the target HTMLElement)
    ...
}
var myDiv = {@link Ext#get Ext.get}("myDiv");  // get reference to an {@link Ext.Element}
myDiv.on(         // 'on' is shorthand for addListener
    "click",      // perform an action on click of myDiv
    handleClick   // reference to the action handler
);
// other methods to do the same:
Ext.EventManager.on("myDiv", 'click', handleClick);
Ext.EventManager.addListener("myDiv", 'click', handleClick);
 </code></pre>
 * @singleton
 */
Ext.EventObject = function(){
    var E = Ext.lib.Event,
        clickRe = /(dbl)?click/,
        // safari keypress events for special keys return bad keycodes
        safariKeys = {
            3 : 13, // enter
            63234 : 37, // left
            63235 : 39, // right
            63232 : 38, // up
            63233 : 40, // down
            63276 : 33, // page up
            63277 : 34, // page down
            63272 : 46, // delete
            63273 : 36, // home
            63275 : 35  // end
        },
        // normalize button clicks
        btnMap = Ext.isIE ? {1:0,4:1,2:2} : {0:0,1:1,2:2};

    Ext.EventObjectImpl = function(e){
        if(e){
            this.setEvent(e.browserEvent || e);
        }
    };

    Ext.EventObjectImpl.prototype = {
           /** @private */
        setEvent : function(e){
            var me = this;
            if(e == me || (e && e.browserEvent)){ // already wrapped
                return e;
            }
            me.browserEvent = e;
            if(e){
                // normalize buttons
                me.button = e.button ? btnMap[e.button] : (e.which ? e.which - 1 : -1);
                if(clickRe.test(e.type) && me.button == -1){
                    me.button = 0;
                }
                me.type = e.type;
                me.shiftKey = e.shiftKey;
                // mac metaKey behaves like ctrlKey
                me.ctrlKey = e.ctrlKey || e.metaKey || false;
                me.altKey = e.altKey;
                // in getKey these will be normalized for the mac
                me.keyCode = e.keyCode;
                me.charCode = e.charCode;
                // cache the target for the delayed and or buffered events
                me.target = E.getTarget(e);
                // same for XY
                me.xy = E.getXY(e);
            }else{
                me.button = -1;
                me.shiftKey = false;
                me.ctrlKey = false;
                me.altKey = false;
                me.keyCode = 0;
                me.charCode = 0;
                me.target = null;
                me.xy = [0, 0];
            }
            return me;
        },

        /**
         * Stop the event (preventDefault and stopPropagation)
         */
        stopEvent : function(){
            var me = this;
            if(me.browserEvent){
                if(me.browserEvent.type == 'mousedown'){
                    Ext.EventManager.stoppedMouseDownEvent.fire(me);
                }
                E.stopEvent(me.browserEvent);
            }
        },

        /**
         * Prevents the browsers default handling of the event.
         */
        preventDefault : function(){
            if(this.browserEvent){
                E.preventDefault(this.browserEvent);
            }
        },

        /**
         * Cancels bubbling of the event.
         */
        stopPropagation : function(){
            var me = this;
            if(me.browserEvent){
                if(me.browserEvent.type == 'mousedown'){
                    Ext.EventManager.stoppedMouseDownEvent.fire(me);
                }
                E.stopPropagation(me.browserEvent);
            }
        },

        /**
         * Gets the character code for the event.
         * @return {Number}
         */
        getCharCode : function(){
            return this.charCode || this.keyCode;
        },

        /**
         * Returns a normalized keyCode for the event.
         * @return {Number} The key code
         */
        getKey : function(){
            return this.normalizeKey(this.keyCode || this.charCode);
        },

        // private
        normalizeKey: function(k){
            return Ext.isSafari ? (safariKeys[k] || k) : k;
        },

        /**
         * Gets the x coordinate of the event.
         * @return {Number}
         */
        getPageX : function(){
            return this.xy[0];
        },

        /**
         * Gets the y coordinate of the event.
         * @return {Number}
         */
        getPageY : function(){
            return this.xy[1];
        },

        /**
         * Gets the page coordinates of the event.
         * @return {Array} The xy values like [x, y]
         */
        getXY : function(){
            return this.xy;
        },

        /**
         * Gets the target for the event.
         * @param {String} selector (optional) A simple selector to filter the target or look for an ancestor of the target
         * @param {Number/Mixed} maxDepth (optional) The max depth to
                search as a number or element (defaults to 10 || document.body)
         * @param {Boolean} returnEl (optional) True to return a Ext.Element object instead of DOM node
         * @return {HTMLelement}
         */
        getTarget : function(selector, maxDepth, returnEl){
            return selector ? Ext.fly(this.target).findParent(selector, maxDepth, returnEl) : (returnEl ? Ext.get(this.target) : this.target);
        },

        /**
         * Gets the related target.
         * @return {HTMLElement}
         */
        getRelatedTarget : function(){
            return this.browserEvent ? E.getRelatedTarget(this.browserEvent) : null;
        },

        /**
         * Normalizes mouse wheel delta across browsers
         * @return {Number} The delta
         */
        getWheelDelta : function(){
            var e = this.browserEvent;
            var delta = 0;
            if(e.wheelDelta){ /* IE/Opera. */
                delta = e.wheelDelta/120;
            }else if(e.detail){ /* Mozilla case. */
                delta = -e.detail/3;
            }
            return delta;
        },

        /**
        * Returns true if the target of this event is a child of el.  Unless the allowEl parameter is set, it will return false if if the target is el.
        * Example usage:<pre><code>
        // Handle click on any child of an element
        Ext.getBody().on('click', function(e){
            if(e.within('some-el')){
                alert('Clicked on a child of some-el!');
            }
        });

        // Handle click directly on an element, ignoring clicks on child nodes
        Ext.getBody().on('click', function(e,t){
            if((t.id == 'some-el') && !e.within(t, true)){
                alert('Clicked directly on some-el!');
            }
        });
        </code></pre>
         * @param {Mixed} el The id, DOM element or Ext.Element to check
         * @param {Boolean} related (optional) true to test if the related target is within el instead of the target
         * @param {Boolean} allowEl (optional) true to also check if the passed element is the target or related target
         * @return {Boolean}
         */
        within : function(el, related, allowEl){
            if(el){
                var t = this[related ? "getRelatedTarget" : "getTarget"]();
                return t && ((allowEl ? (t == Ext.getDom(el)) : false) || Ext.fly(el).contains(t));
            }
            return false;
        }
     };

    return new Ext.EventObjectImpl();
}();