comt: comparison src/cm/media/js/lib/yui/yui_3.0.0b1/build/event-custom/event-custom.js

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src/cm/media/js/lib/yui/yui_3.0.0b1/build/event-custom/event-custom.js

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+:40c8f766c9b8
+/*
+Copyright (c) 2009, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.net/yui/license.txt
+version: 3.0.0b1
+build: 1163
+*/
+YUI.add('event-custom', function(Y) {
+Y.Env.evt = {
+handles: {},
+plugins: {}
+};
+(function() {
+/**
+* Allows for the insertion of methods that are executed before or after
+* a specified method
+* @class Do
+* @static
+*/
+var BEFORE = 0,
+AFTER = 1;
+Y.Do = {
+/**
+* Cache of objects touched by the utility
+* @property objs
+* @static
+*/
+objs: {},
+/**
+* Execute the supplied method before the specified function
+* @method before
+* @param fn {Function} the function to execute
+* @param obj the object hosting the method to displace
+* @param sFn {string} the name of the method to displace
+* @param c The execution context for fn
+* @return {string} handle for the subscription
+* @static
+*/
+before: function(fn, obj, sFn, c) {
+var f = fn, a;
+if (c) {
+a = [fn, c].concat(Y.Array(arguments, 4, true));
+f = Y.rbind.apply(Y, a);
+}
+return this._inject(BEFORE, f, obj, sFn);
+},
+/**
+* Execute the supplied method after the specified function
+* @method after
+* @param fn {Function} the function to execute
+* @param obj the object hosting the method to displace
+* @param sFn {string} the name of the method to displace
+* @param c The execution context for fn
+* @return {string} handle for the subscription
+* @static
+*/
+after: function(fn, obj, sFn, c) {
+var f = fn, a;
+if (c) {
+a = [fn, c].concat(Y.Array(arguments, 4, true));
+f = Y.rbind.apply(Y, a);
+}
+return this._inject(AFTER, f, obj, sFn);
+},
+/**
+* Execute the supplied method after the specified function
+* @method _inject
+* @param when {string} before or after
+* @param fn {Function} the function to execute
+* @param obj the object hosting the method to displace
+* @param sFn {string} the name of the method to displace
+* @param c The execution context for fn
+* @return {string} handle for the subscription
+* @private
+* @static
+*/
+_inject: function(when, fn, obj, sFn) {
+// object id
+var id = Y.stamp(obj), o, sid;
+if (! this.objs[id]) {
+// create a map entry for the obj if it doesn't exist
+this.objs[id] = {};
+}
+o = this.objs[id];
+if (! o[sFn]) {
+// create a map entry for the method if it doesn't exist
+o[sFn] = new Y.Do.Method(obj, sFn);
+// re-route the method to our wrapper
+obj[sFn] =
+function() {
+return o[sFn].exec.apply(o[sFn], arguments);
+};
+}
+// subscriber id
+sid = id + Y.stamp(fn) + sFn;
+// register the callback
+o[sFn].register(sid, fn, when);
+return new Y.EventHandle(o[sFn], sid);
+},
+/**
+* Detach a before or after subscription
+* @method detach
+* @param handle {string} the subscription handle
+*/
+detach: function(handle) {
+if (handle.detach) {
+handle.detach();
+}
+},
+_unload: function(e, me) {
+}
+};
+//////////////////////////////////////////////////////////////////////////
+/**
+* Wrapper for a displaced method with aop enabled
+* @class Do.Method
+* @constructor
+* @param obj The object to operate on
+* @param sFn The name of the method to displace
+*/
+Y.Do.Method = function(obj, sFn) {
+this.obj = obj;
+this.methodName = sFn;
+this.method = obj[sFn];
+// this.before = [];
+// this.after = [];
+this.before = {};
+this.after = {};
+};
+/**
+* Register a aop subscriber
+* @method register
+* @param sid {string} the subscriber id
+* @param fn {Function} the function to execute
+* @param when {string} when to execute the function
+*/
+Y.Do.Method.prototype.register = function (sid, fn, when) {
+if (when) {
+// this.after.push(fn);
+this.after[sid] = fn;
+} else {
+// this.before.push(fn);
+this.before[sid] = fn;
+}
+};
+/**
+* Unregister a aop subscriber
+* @method delete
+* @param sid {string} the subscriber id
+* @param fn {Function} the function to execute
+* @param when {string} when to execute the function
+*/
+Y.Do.Method.prototype._delete = function (sid) {
+delete this.before[sid];
+delete this.after[sid];
+};
+/**
+* Execute the wrapped method
+* @method exec
+*/
+Y.Do.Method.prototype.exec = function () {
+var args = Y.Array(arguments, 0, true),
+i, ret, newRet,
+bf = this.before,
+af = this.after,
+prevented = false;
+// execute before
+for (i in bf) {
+if (bf.hasOwnProperty(i)) {
+ret = bf[i].apply(this.obj, args);
+if (ret) {
+switch (ret.constructor) {
+case Y.Do.Halt:
+return ret.retVal;
+case Y.Do.AlterArgs:
+args = ret.newArgs;
+break;
+case Y.Do.Prevent:
+prevented = true;
+break;
+default:
+}
+}
+}
+}
+// execute method
+if (!prevented) {
+ret = this.method.apply(this.obj, args);
+}
+// execute after methods.
+for (i in af) {
+if (af.hasOwnProperty(i)) {
+newRet = af[i].apply(this.obj, args);
+// Stop processing if a Halt object is returned
+if (newRet && newRet.constructor == Y.Do.Halt) {
+return newRet.retVal;
+// Check for a new return value
+} else if (newRet && newRet.constructor == Y.Do.AlterReturn) {
+ret = newRet.newRetVal;
+}
+}
+}
+return ret;
+};
+//////////////////////////////////////////////////////////////////////////
+/**
+* Return an AlterArgs object when you want to change the arguments that
+* were passed into the function.  An example would be a service that scrubs
+* out illegal characters prior to executing the core business logic.
+* @class Do.AlterArgs
+*/
+Y.Do.AlterArgs = function(msg, newArgs) {
+this.msg = msg;
+this.newArgs = newArgs;
+};
+/**
+* Return an AlterReturn object when you want to change the result returned
+* from the core method to the caller
+* @class Do.AlterReturn
+*/
+Y.Do.AlterReturn = function(msg, newRetVal) {
+this.msg = msg;
+this.newRetVal = newRetVal;
+};
+/**
+* Return a Halt object when you want to terminate the execution
+* of all subsequent subscribers as well as the wrapped method
+* if it has not exectued yet.
+* @class Do.Halt
+*/
+Y.Do.Halt = function(msg, retVal) {
+this.msg = msg;
+this.retVal = retVal;
+};
+/**
+* Return a Prevent object when you want to prevent the wrapped function
+* from executing, but want the remaining listeners to execute
+* @class Do.Prevent
+*/
+Y.Do.Prevent = function(msg) {
+this.msg = msg;
+};
+/**
+* Return an Error object when you want to terminate the execution
+* of all subsequent method calls.
+* @class Do.Error
+* @deprecated use Y.Do.Halt or Y.Do.Prevent
+*/
+Y.Do.Error = Y.Do.Halt;
+//////////////////////////////////////////////////////////////////////////
+// Y["Event"] && Y.Event.addListener(window, "unload", Y.Do._unload, Y.Do);
+})();
+(function() {
+/**
+* Wraps and protects a custom event for use when emitFacade is set to true.
+* @class EventFacade
+* @param e {Event} the custom event
+* @param currentTarget {HTMLElement} the element the listener was attached to
+*/
+/*
+var PROPS = {
+details: 1,
+type: 1,
+target: 1,
+currentTarget: 1,
+stopPropagation: 2,
+stopImmediatePropagation: 2,
+preventDefault: 2,
+halt: 2
+};
+Y.EventFacade = function(e, currentTarget) {
+if (e) {
+Y.Object.each(PROPS, function(v, k) {
+//this[k] = (v == 2) ? e[k].apply(e, arguments) : e[k];
+var val = e[k];
+if (val) {
+this[k] = (v == 2) ? function() {
+if (val) {
+val.apply(e, arguments);
+}
+} : val;
+} else {
+console.log('missing ' + k);
+}
+});
+}
+};
+*/
+Y.EventFacade = function(e, currentTarget) {
+e = e || {};
+/**
+* The arguments passed to fire
+* @property details
+* @type Array
+*/
+this.details = e.details;
+/**
+* The event type
+* @property type
+* @type string
+*/
+this.type = e.type;
+//////////////////////////////////////////////////////
+/**
+* Node reference for the targeted eventtarget
+* @propery target
+* @type Node
+*/
+this.target = e.target;
+/**
+* Node reference for the element that the listener was attached to.
+* @propery currentTarget
+* @type Node
+*/
+this.currentTarget = currentTarget;
+/**
+* Node reference to the relatedTarget
+* @propery relatedTarget
+* @type Node
+*/
+this.relatedTarget = e.relatedTarget;
+/**
+* Stops the propagation to the next bubble target
+* @method stopPropagation
+*/
+this.stopPropagation = function() {
+e.stopPropagation();
+};
+/**
+* Stops the propagation to the next bubble target and
+* prevents any additional listeners from being exectued
+* on the current target.
+* @method stopImmediatePropagation
+*/
+this.stopImmediatePropagation = function() {
+e.stopImmediatePropagation();
+};
+/**
+* Prevents the event's default behavior
+* @method preventDefault
+*/
+this.preventDefault = function() {
+e.preventDefault();
+};
+/**
+* Stops the event propagation and prevents the default
+* event behavior.
+* @method halt
+* @param immediate {boolean} if true additional listeners
+* on the current target will not be executed
+*/
+this.halt = function(immediate) {
+e.halt(immediate);
+};
+};
+})();
+/**
+* Custom event engine, DOM event listener abstraction layer, synthetic DOM
+* events.
+* @module event-custom
+*/
+/**
+* Return value from all subscribe operations
+* @class EventHandle
+* @constructor
+* @param evt {CustomEvent} the custom event
+* @param sub {Subscriber} the subscriber
+*/
+// var onsubscribeType = "_event:onsub",
+var AFTER = 'after',
+CONFIGS = [
+'broadcast',
+'bubbles',
+'context',
+'contextFn',
+'configured',
+'currentTarget',
+'defaultFn',
+'details',
+'emitFacade',
+'fireOnce',
+'host',
+'preventable',
+'preventedFn',
+'queuable',
+'silent',
+'stoppedFn',
+'target',
+'type'
+],
+FACADE = new Y.EventFacade(),
+FACADE_KEYS = Y.Object.keys(FACADE),
+YUI3_SIGNATURE = 9,
+YUI_LOG = 'yui:log';
+Y.EventHandle = function(evt, sub) {
+/**
+* The custom event
+* @type CustomEvent
+*/
+this.evt = evt;
+/**
+* The subscriber object
+* @type Subscriber
+*/
+this.sub = sub;
+};
+Y.EventHandle.prototype = {
+/**
+* Detaches this subscriber
+* @method detach
+*/
+detach: function() {
+if (this.evt) {
+this.evt._delete(this.sub);
+}
+}
+};
+/**
+* The CustomEvent class lets you define events for your application
+* that can be subscribed to by one or more independent component.
+*
+* @param {String}  type The type of event, which is passed to the callback
+*                  when the event fires
+* @param o configuration object
+* @class CustomEvent
+* @constructor
+*/
+Y.CustomEvent = function(type, o) {
+// if (arguments.length > 2) {
+// this.log('CustomEvent context and silent are now in the config', 'warn', 'Event');
+// }
+o = o || {};
+this.id = Y.stamp(this);
+/**
+* The type of event, returned to subscribers when the event fires
+* @property type
+* @type string
+*/
+this.type = type;
+/**
+* The context the the event will fire from by default.  Defaults to the YUI
+* instance.
+* @property context
+* @type object
+*/
+this.context = Y;
+this.logSystem = (type == YUI_LOG);
+/**
+* If 0, this event does not broadcast.  If 1, the YUI instance is notified
+* every time this event fires.  If 2, the YUI instance and the YUI global
+* (if event is enabled on the global) are notified every time this event
+* fires.
+* @property broadcast
+* @type int
+*/
+// this.broadcast = 0;
+/**
+* By default all custom events are logged in the debug build, set silent
+* to true to disable debug outpu for this event.
+* @property silent
+* @type boolean
+*/
+this.silent = this.logSystem;
+// this.queuable = false;
+/**
+* The subscribers to this event
+* @property subscribers
+* @type Subscriber{}
+*/
+this.subscribers = {};
+/*
+* The publisher has configured this event
+* @property configured
+* @type boolean
+* @default true
+*/
+// this.configured = true;
+/**
+* 'After' subscribers
+* @property afters
+* @type Subscriber{}
+*/
+this.afters = {};
+/**
+* This event has fired if true
+*
+* @property fired
+* @type boolean
+* @default false;
+*/
+// this.fired = false;
+/**
+* This event should only fire one time if true, and if
+* it has fired, any new subscribers should be notified
+* immediately.
+*
+* @property fireOnce
+* @type boolean
+* @default false;
+*/
+// this.fireOnce = false;
+/**
+* Flag for stopPropagation that is modified during fire()
+* 1 means to stop propagation to bubble targets.  2 means
+* to also stop additional subscribers on this target.
+* @property stopped
+* @type int
+*/
+// this.stopped = 0;
+/**
+* Flag for preventDefault that is modified during fire().
+* if it is not 0, the default behavior for this event
+* @property prevented
+* @type int
+*/
+// this.prevented = 0;
+/**
+* Specifies the host for this custom event.  This is used
+* to enable event bubbling
+* @property host
+* @type EventTarget
+*/
+// this.host = null;
+/**
+* The default function to execute after event listeners
+* have fire, but only if the default action was not
+* prevented.
+* @property defaultFn
+* @type Function
+*/
+// this.defaultFn = null;
+/**
+* The function to execute if a subscriber calls
+* stopPropagation or stopImmediatePropagation
+* @property stoppedFn
+* @type Function
+*/
+// this.stoppedFn = null;
+/**
+* The function to execute if a subscriber calls
+* preventDefault
+* @property preventedFn
+* @type Function
+*/
+// this.preventedFn = null;
+/**
+* Specifies whether or not this event's default function
+* can be cancelled by a subscriber by executing preventDefault()
+* on the event facade
+* @property preventable
+* @type boolean
+* @default true
+*/
+this.preventable = true;
+/**
+* Specifies whether or not a subscriber can stop the event propagation
+* via stopPropagation(), stopImmediatePropagation(), or halt()
+* @property bubbles
+* @type boolean
+* @default true
+*/
+this.bubbles = true;
+/**
+* Supports multiple options for listener signatures in order to
+* port YUI 2 apps.
+* @property signature
+* @type int
+* @default 9
+*/
+this.signature = YUI3_SIGNATURE;
+// this.hasSubscribers = false;
+// this.hasAfters = false;
+/**
+* If set to true, the custom event will deliver an EventFacade object
+* that is similar to a DOM event object.
+* @property emitFacade
+* @type boolean
+* @default false
+*/
+// this.emitFacade = false;
+this.applyConfig(o, true);
+// this.log("Creating " + this.type);
+};
+Y.CustomEvent.prototype = {
+_YUI_EVENT: true,
+/**
+* Apply configuration properties.  Only applies the CONFIG whitelist
+* @method applyConfig
+* @param o hash of properties to apply
+* @param force {boolean} if true, properties that exist on the event
+* will be overwritten.
+*/
+applyConfig: function(o, force) {
+if (o) {
+Y.mix(this, o, force, CONFIGS);
+}
+},
+_on: function(fn, context, args, when) {
+if (!fn) {
+Y.error("Invalid callback for CE: " + this.type);
+}
+var s = new Y.Subscriber(fn, context, args, when);
+if (this.fireOnce && this.fired) {
+Y.later(0, this, this._notify, s);
+}
+if (when == AFTER) {
+this.afters[s.id] = s;
+this.hasAfters = true;
+} else {
+this.subscribers[s.id] = s;
+this.hasSubscribers = true;
+}
+return new Y.EventHandle(this, s);
+},
+/**
+* Listen for this event
+* @method subscribe
+* @param {Function} fn        The function to execute
+* @return {EventHandle|EventTarget} unsubscribe handle or a
+* chainable event target depending on the 'chain' config.
+* @deprecated use on
+*/
+subscribe: function(fn, context) {
+var a = (arguments.length > 2) ? Y.Array(arguments, 2, true): null;
+return this._on(fn, context, a, true);
+},
+/**
+* Listen for this event
+* @method on
+* @param {Function} fn        The function to execute
+* @return {EventHandle|EventTarget} unsubscribe handle or a
+* chainable event target depending on the 'chain' config.
+*/
+on: function(fn, context) {
+var a = (arguments.length > 2) ? Y.Array(arguments, 2, true): null;
+return this._on(fn, context, a, true);
+},
+/**
+* Listen for this event after the normal subscribers have been notified and
+* the default behavior has been applied.  If a normal subscriber prevents the
+* default behavior, it also prevents after listeners from firing.
+* @method after
+* @param {Function} fn        The function to execute
+* @return {EventHandle|EventTarget} unsubscribe handle or a
+* chainable event target depending on the 'chain' config.
+*/
+after: function(fn, context) {
+var a = (arguments.length > 2) ? Y.Array(arguments, 2, true): null;
+return this._on(fn, context, a, AFTER);
+},
+/**
+* Detach listeners.
+* @method detach
+* @param {Function} fn  The subscribed function to remove, if not supplied
+*                       all will be removed
+* @param {Object}   context The context object passed to subscribe.
+* @return {boolean|EventTarget} returns a chainable event target
+* or a boolean for legacy detach support.
+*/
+detach: function(fn, context) {
+// if arg[0] typeof unsubscribe handle
+if (fn && fn.detach) {
+return fn.detach();
+}
+if (!fn) {
+return this.unsubscribeAll();
+}
+var found = false, subs = this.subscribers, i, s;
+for (i in subs) {
+if (subs.hasOwnProperty(i)) {
+s = subs[i];
+if (s && s.contains(fn, context)) {
+this._delete(s);
+found = true;
+}
+}
+}
+return found;
+},
+/**
+* Detach listeners.
+* @method unsubscribe
+* @param {Function} fn  The subscribed function to remove, if not supplied
+*                       all will be removed
+* @param {Object}   context The context object passed to subscribe.
+* @return {boolean|EventTarget} returns a chainable event target
+* or a boolean for legacy detach support.
+* @deprecated use detach
+*/
+unsubscribe: function() {
+return this.detach.apply(this, arguments);
+},
+_getFacade: function() {
+var ef = this._facade, o, args = this.details, o2;
+if (!ef) {
+ef = new Y.EventFacade(this, this.currentTarget);
+}
+// if the first argument is an object literal, apply the
+// properties to the event facade
+o = args && args[0];
+if (Y.Lang.isObject(o, true)) {
+o2 = {};
+// protect the event facade properties
+Y.mix(o2, ef, true, FACADE_KEYS);
+// mix the data
+Y.mix(ef, o, true);
+// restore ef
+Y.mix(ef, o2, true, FACADE_KEYS);
+}
+// update the details field with the arguments
+// ef.type = this.type;
+ef.details = this.details;
+ef.target = this.target;
+ef.currentTarget = this.currentTarget;
+ef.stopped = 0;
+ef.prevented = 0;
+this._facade = ef;
+return this._facade;
+},
+/**
+* Notify a single subscriber
+* @method _notify
+* @param s {Subscriber} the subscriber
+* @param args {Array} the arguments array to apply to the listener
+* @private
+*/
+_notify: function(s, args, ef) {
+this.log(this.type + "->" + ": " +  s);
+var ret;
+// emit an EventFacade if this is that sort of event
+if (this.emitFacade) {
+// @TODO object literal support to fire makes it possible for
+// config info to be passed if we wish.
+if (!ef) {
+ef = this._getFacade(args);
+if (Y.Lang.isObject(args[0])) {
+args[0] = ef;
+} else {
+args.unshift(ef);
+}
+}
+}
+ret = s.notify(args, this);
+if (false === ret || this.stopped > 1) {
+this.log(this.type + " cancelled by subscriber");
+return false;
+}
+return true;
+},
+/**
+* Logger abstraction to centralize the application of the silent flag
+* @method log
+* @param msg {string} message to log
+* @param cat {string} log category
+*/
+log: function(msg, cat) {
+if (!this.silent) {
+}
+},
+/**
+* Notifies the subscribers.  The callback functions will be executed
+* from the context specified when the event was created, and with the
+* following parameters:
+*   <ul>
+*   <li>The type of event</li>
+*   <li>All of the arguments fire() was executed with as an array</li>
+*   <li>The custom object (if any) that was passed into the subscribe()
+*       method</li>
+*   </ul>
+* @method fire
+* @param {Object*} arguments an arbitrary set of parameters to pass to
+*                            the handler.
+* @return {boolean} false if one of the subscribers returned false,
+*                   true otherwise
+*/
+fire: function() {
+var es = Y.Env._eventstack,
+subs, s, args, i, ef, q, queue, ce, hasSub,
+ret = true, events;
+// @TODO find a better way to short circuit this.
+// if (!this.broadcast && !this.defaultFn && !this.hasSubscribers && !this.hasAfters) {
+//     return true;
+// }
+if (es) {
+// queue this event if the current item in the queue bubbles
+// if (b && this.queuable && this.type != es.next.type) {
+if (this.queuable && this.type != es.next.type) {
+this.log('queue ' + this.type);
+es.queue.push([this, arguments]);
+return true;
+}
+} else {
+Y.Env._eventstack = {
+// id of the first event in the stack
+id: this.id,
+next: this,
+silent: this.silent,
+logging: (this.type === YUI_LOG),
+stopped: 0,
+prevented: 0,
+queue: []
+};
+es = Y.Env._eventstack;
+}
+if (this.fireOnce && this.fired) {
+this.log('fireOnce event: ' + this.type + ' already fired');
+} else {
+args = Y.Array(arguments, 0, true);
+this.stopped = 0;
+this.prevented = 0;
+this.target = this.target || this.host;
+events = new Y.EventTarget({
+fireOnce: true,
+context: this.host
+});
+this.events = events;
+if (this.preventedFn) {
+events.on('prevented', this.preventedFn);
+}
+if (this.stoppedFn) {
+events.on('stopped', this.stoppedFn);
+}
+this.currentTarget = this.host || this.currentTarget;
+this.fired = true;
+this.details = args.slice(); // original arguments in the details
+// this.log("Firing " + this  + ", " + "args: " + args);
+this.log("Firing " + this.type);
+hasSub = false;
+es.lastLogState = es.logging;
+ef = null;
+if (this.emitFacade) {
+// this.fire({
+//   foo: 1
+//   bar: 2
+// }
+// this.fire({
+//   bar: 2
+// } // foo is still 1 unless we create a new facade
+this._facade = null;
+ef = this._getFacade(args);
+if (Y.Lang.isObject(args[0])) {
+args[0] = ef;
+} else {
+args.unshift(ef);
+}
+}
+if (this.hasSubscribers) {
+subs = Y.merge(this.subscribers);
+for (i in subs) {
+if (subs.hasOwnProperty(i)) {
+if (!hasSub) {
+es.logging = (es.logging || (this.type === YUI_LOG));
+hasSub = true;
+}
+// stopImmediatePropagation
+if (this.stopped == 2) {
+break;
+}
+s = subs[i];
+if (s && s.fn) {
+ret = this._notify(s, args, ef);
+if (false === ret) {
+this.stopped = 2;
+}
+}
+}
+}
+}
+es.logging = (es.lastLogState);
+// bubble if this is hosted in an event target and propagation has not been stopped
+if (this.bubbles && this.host && !this.stopped) {
+es.stopped = 0;
+es.prevented = 0;
+ret = this.host.bubble(this);
+this.stopped = Math.max(this.stopped, es.stopped);
+this.prevented = Math.max(this.prevented, es.prevented);
+}
+// execute the default behavior if not prevented
+if (this.defaultFn && !this.prevented) {
+this.defaultFn.apply(this.host || this, args);
+}
+// broadcast listeners are fired as discreet events on the
+// YUI instance and potentially the YUI global.
+if (!this.stopped && this.broadcast) {
+if (this.host !== Y) {
+Y.fire.apply(Y, args);
+}
+if (this.broadcast == 2) {
+Y.Global.fire.apply(Y.Global, args);
+}
+}
+// process after listeners.  If the default behavior was
+// prevented, the after events don't fire.
+if (this.hasAfters && !this.prevented && this.stopped < 2) {
+subs = Y.merge(this.afters);
+for (i in subs) {
+if (subs.hasOwnProperty(i)) {
+if (!hasSub) {
+es.logging = (es.logging || (this.type === YUI_LOG));
+hasSub = true;
+}
+// stopImmediatePropagation
+if (this.stopped == 2) {
+break;
+}
+s = subs[i];
+if (s && s.fn) {
+ret = this._notify(s, args, ef);
+if (false === ret) {
+this.stopped = 2;
+}
+}
+}
+}
+}
+}
+if (es.id === this.id) {
+// console.log('clearing stack: ' + es.id + ', ' + this);
+// reset propragation properties while processing the rest of the queue
+// process queued events
+queue = es.queue;
+while (queue.length) {
+// q[0] = the event, q[1] = arguments to fire
+q = queue.pop();
+ce = q[0];
+es.stopped = 0;
+es.prevented = 0;
+// set up stack to allow the next item to be processed
+es.next = ce;
+ret = ce.fire.apply(ce, q[1]);
+}
+Y.Env._eventstack = null;
+}
+return (ret !== false);
+},
+/**
+* Removes all listeners
+* @method unsubscribeAll
+* @return {int} The number of listeners unsubscribed
+* @deprecated use detachAll
+*/
+unsubscribeAll: function() {
+return this.detachAll.apply(this, arguments);
+},
+/**
+* Removes all listeners
+* @method detachAll
+* @return {int} The number of listeners unsubscribed
+*/
+detachAll: function() {
+var subs = this.subscribers, i, l=0;
+for (i in subs) {
+if (subs.hasOwnProperty(i)) {
+this._delete(subs[i]);
+l++;
+}
+}
+this.subscribers={};
+return l;
+},
+/**
+* @method _delete
+* @param subscriber object
+* @private
+*/
+_delete: function(s) {
+if (s) {
+delete s.fn;
+delete s.context;
+delete this.subscribers[s.id];
+delete this.afters[s.id];
+}
+},
+/**
+* @method toString
+*/
+toString: function() {
+return this.type;
+},
+/**
+* Stop propagation to bubble targets
+* @method stopPropagation
+*/
+stopPropagation: function() {
+this.stopped = 1;
+Y.Env._eventstack.stopped = 1;
+this.events.fire('stopped', this);
+},
+/**
+* Stops propagation to bubble targets, and prevents any remaining
+* subscribers on the current target from executing.
+* @method stopImmediatePropagation
+*/
+stopImmediatePropagation: function() {
+this.stopped = 2;
+Y.Env._eventstack.stopped = 2;
+this.events.fire('stopped', this);
+},
+/**
+* Prevents the execution of this event's defaultFn
+* @method preventDefault
+*/
+preventDefault: function() {
+if (this.preventable) {
+this.prevented = 1;
+Y.Env._eventstack.prevented = 1;
+this.events.fire('prevented', this);
+}
+},
+/**
+* Stops the event propagation and prevents the default
+* event behavior.
+* @method halt
+* @param immediate {boolean} if true additional listeners
+* on the current target will not be executed
+*/
+halt: function(immediate) {
+if (immediate) {
+this.stopImmediatePropagation();
+} else {
+this.stopPropagation();
+}
+this.preventDefault();
+}
+};
+/////////////////////////////////////////////////////////////////////
+/**
+* Stores the subscriber information to be used when the event fires.
+* @param {Function} fn       The wrapped function to execute
+* @param {Object}   context  The value of the keyword 'this' in the listener
+* @param {Array} args*       0..n additional arguments to supply the listener
+*
+* @class Subscriber
+* @constructor
+*/
+Y.Subscriber = function(fn, context, args) {
+/**
+* The callback that will be execute when the event fires
+* This is wrapped by Y.rbind if obj was supplied.
+* @property fn
+* @type Function
+*/
+this.fn = fn;
+/**
+* Optional 'this' keyword for the listener
+* @property context
+* @type Object
+*/
+this.context = context;
+/**
+* Unique subscriber id
+* @property id
+* @type String
+*/
+this.id = Y.stamp(this);
+/*
+* }
+* fn bound to obj with additional arguments applied via Y.rbind
+* @property wrappedFn
+* @type Function
+*/
+// this.wrappedFn = fn;
+/**
+* Additional arguments to propagate to the subscriber
+* @property args
+* @type Array
+*/
+this.args = args;
+/**
+* Custom events for a given fire transaction.
+* @property events
+* @type {EventTarget}
+*/
+this.events = null;
+// if (context) {
+//     this.wrappedFn = Y.rbind.apply(Y, args);
+// }
+};
+Y.Subscriber.prototype = {
+_notify: function(c, args, ce) {
+var a = this.args, ret;
+switch (ce.signature) {
+case 0:
+ret = this.fn.call(c, ce.type, args, c);
+break;
+case 1:
+ret = this.fn.call(c, args[0] || null, c);
+break;
+default:
+if (a || args) {
+args = args || [];
+a = (a) ? args.concat(a) : args;
+ret = this.fn.apply(c, a);
+} else {
+ret = this.fn.call(c);
+}
+}
+return ret;
+},
+/**
+* Executes the subscriber.
+* @method notify
+* @param args {Array} Arguments array for the subscriber
+* @param ce {CustomEvent} The custom event that sent the notification
+*/
+notify: function(args, ce) {
+var c = this.context,
+ret = true;
+if (!c) {
+c = (ce.contextFn) ? ce.contextFn() : ce.context;
+}
+// Ease debugging by only catching errors if we will not re-throw
+// them.
+if (Y.config.throwFail) {
+ret = this._notify(c, args, ce);
+} else {
+try {
+ret = this._notify(c, args, ce);
+} catch(e) {
+Y.error(this + ' failed: ' + e.message, e);
+}
+}
+return ret;
+},
+/**
+* Returns true if the fn and obj match this objects properties.
+* Used by the unsubscribe method to match the right subscriber.
+*
+* @method contains
+* @param {Function} fn the function to execute
+* @param {Object} context optional 'this' keyword for the listener
+* @return {boolean} true if the supplied arguments match this
+*                   subscriber's signature.
+*/
+contains: function(fn, context) {
+if (context) {
+return ((this.fn == fn) && this.context == context);
+} else {
+return (this.fn == fn);
+}
+},
+/**
+* @method toString
+*/
+toString: function() {
+return "Subscriber " + this.id;
+}
+};
+// FACADE = new Y.EventFacade(new Y.CustomEvent('x'));
+(function() {
+/**
+* EventTarget provides the implementation for any object to
+* publish, subscribe and fire to custom events, and also
+* alows other EventTargets to target the object with events
+* sourced from the other object.
+* EventTarget is designed to be used with Y.augment to wrap
+* EventCustom in an interface that allows events to be listened to
+* and fired by name.  This makes it possible for implementing code to
+* subscribe to an event that either has not been created yet, or will
+* not be created at all.
+* @class EventTarget
+* @param opts a configuration object
+* @config emitFacade {boolean} if true, all events will emit event
+* facade payloads by default (default false)
+* @config prefix {string} the prefix to apply to non-prefixed event names
+* @config chain {boolean} if true, on/after/detach return the host to allow
+* chaining, otherwise they return an EventHandle (default false)
+*/
+var L = Y.Lang,
+PREFIX_DELIMITER = ':',
+CATEGORY_DELIMITER = '|',
+AFTER_PREFIX = '~AFTER~',
+/**
+* If the instance has a prefix attribute and the
+* event type is not prefixed, the instance prefix is
+* applied to the supplied type.
+* @method _getType
+* @private
+*/
+_getType = Y.cached(function(type, pre) {
+if (!pre || !L.isString(type) || type.indexOf(PREFIX_DELIMITER) > -1) {
+return type;
+}
+return pre + PREFIX_DELIMITER + type;
+}),
+/**
+* Returns an array with the detach key (if provided),
+* and the prefixed event name from _getType
+* Y.on('detachcategory, menu:click', fn)
+* @method _parseType
+* @private
+*/
+_parseType = Y.cached(function(type, pre) {
+var t = type, detachcategory, after, i, full_t;
+if (!L.isString(t)) {
+return t;
+}
+i = t.indexOf(AFTER_PREFIX);
+if (i > -1) {
+after = true;
+t = t.substr(AFTER_PREFIX.length);
+}
+// parts = t.split(DETACH_PREFIX_SPLITTER);
+// if (parts.length > 1) {
+//     detachcategory = parts[0];
+//     t = parts[1];
+//     if (t == '*') {
+//          t = null;
+//     }
+// }
+i = t.indexOf(CATEGORY_DELIMITER);
+if (i > -1) {
+detachcategory = t.substr(0, (i));
+t = t.substr(i+1);
+if (t == '*') {
+t = null;
+}
+}
+full_t = _getType(t, pre);
+return [detachcategory, full_t, after, t];
+}),
+ET = function(opts) {
+// console.log('EventTarget constructor executed: ' + this._yuid);
+var o = (L.isObject(opts)) ? opts : {};
+this._yuievt = {
+id: Y.guid(),
+events: {},
+targets: {},
+config: o,
+chain: ('chain' in o) ? o.chain : Y.config.chain,
+defaults: {
+context: o.context || this,
+host: this,
+emitFacade: o.emitFacade,
+fireOnce: o.fireOnce,
+queuable: o.queuable,
+broadcast: o.broadcast,
+bubbles: ('bubbles' in o) ? o.bubbles : true
+}
+};
+};
+ET.prototype = {
+/**
+* Subscribe to a custom event hosted by this object
+* @method on
+* @param type    {string}   The type of the event
+* @param fn {Function} The callback
+* @return the event target or a detach handle per 'chain' config
+*/
+on: function(type, fn, context, x) {
+var parts = _parseType(type, this._yuievt.config.prefix), f, c, args, ret, ce,
+detachcategory, handle, store = Y.Env.evt.handles, after, adapt, shorttype,
+Node = Y.Node, n;
+if (L.isObject(type, true)) {
+f = fn;
+c = context;
+args = Y.Array(arguments, 0, true);
+ret = {};
+after = type._after;
+delete type._after;
+Y.each(type, function(v, k) {
+if (v) {
+f = v.fn || ((Y.Lang.isFunction(v)) ? v : f);
+c = v.context || c;
+}
+args[0] = (after) ? AFTER_PREFIX + k : k;
+args[1] = f;
+args[2] = c;
+ret[k] = this.on.apply(this, args);
+}, this);
+return (this._yuievt.chain) ? this : ret;
+} else if (L.isFunction(type)) {
+return Y.Do.before.apply(Y.Do, arguments);
+}
+detachcategory = parts[0];
+after = parts[2];
+shorttype = parts[3];
+// extra redirection so we catch adaptor events too.  take a look at this.
+if (Node && (this instanceof Node) && (shorttype in Node.DOM_EVENTS)) {
+args = Y.Array(arguments, 0, true);
+args.splice(2, 0, Node.getDOMNode(this));
+return Y.on.apply(Y, args);
+}
+type = parts[1];
+if (this instanceof YUI) {
+adapt = Y.Env.evt.plugins[type];
+args  = Y.Array(arguments, 0, true);
+args[0] = shorttype;
+// check for the existance of an event adaptor
+if (adapt && adapt.on) {
+n = args[2];
+if (Node && n && (n instanceof Node)) {
+args[2] = Node.getDOMNode(n);
+}
+handle = adapt.on.apply(Y, args);
+// check to see if the target is an EventTarget.  If so,
+// delegate to it (the EventTarget should handle whether
+// or not the prefix was included);
+// } else if (o && !(o instanceof YUI) && o.getEvent) {
+//     a = Y.Array(arguments, 0, true);
+//     a.splice(2, 1);
+//     return o.on.apply(o, a);
+// } else if ((!type) || (!adapt && type.indexOf(':') == -1)) {
+} else if ((!type) || (!adapt && Node && (shorttype in Node.DOM_EVENTS))) {
+handle = Y.Event._attach(args);
+}
+}
+if (!handle) {
+ce     = this._yuievt.events[type] || this.publish(type);
+// args   = Y.Array(arguments, 1, true);
+// f = (after) ? ce.after : ce.on;
+// handle = f.apply(ce, args);
+handle = ce._on(fn, context, (arguments.length > 3) ? Y.Array(arguments, 3, true) : null, (after) ? 'after' : true);
+}
+if (detachcategory) {
+store[detachcategory] = store[detachcategory] || {};
+store[detachcategory][type] = store[detachcategory][type] || [];
+store[detachcategory][type].push(handle);
+}
+return (this._yuievt.chain) ? this : handle;
+},
+/**
+* subscribe to an event
+* @method subscribe
+* @deprecated use on
+*/
+subscribe: function() {
+return this.on.apply(this, arguments);
+},
+/**
+* Detach one or more listeners the from the specified event
+* @method detach
+* @param type {string|Object}   Either the handle to the subscriber or the
+*                        type of event.  If the type
+*                        is not specified, it will attempt to remove
+*                        the listener from all hosted events.
+* @param fn   {Function} The subscribed function to unsubscribe, if not
+*                          supplied, all subscribers will be removed.
+* @param context  {Object}   The custom object passed to subscribe.  This is
+*                        optional, but if supplied will be used to
+*                        disambiguate multiple listeners that are the same
+*                        (e.g., you subscribe many object using a function
+*                        that lives on the prototype)
+* @return {EventTarget} the host
+*/
+detach: function(type, fn, context) {
+var parts = _parseType(type, this._yuievt.config.prefix),
+detachcategory = L.isArray(parts) ? parts[0] : null,
+shorttype = (parts) ? parts[3] : null,
+handle, adapt, store = Y.Env.evt.handles, cat, args,
+evts = this._yuievt.events, ce, i, ret = true,
+keyDetacher = function(lcat, ltype) {
+var handles = lcat[ltype];
+if (handles) {
+while (handles.length) {
+handle = handles.pop();
+handle.detach();
+}
+}
+};
+if (detachcategory) {
+cat = store[detachcategory];
+type = parts[1];
+if (cat) {
+if (type) {
+keyDetacher(cat, type);
+} else {
+for (i in cat) {
+if (cat.hasOwnProperty(i)) {
+keyDetacher(cat, i);
+}
+}
+}
+return (this._yuievt.chain) ? this : true;
+}
+// If this is an event handle, use it to detach
+} else if (L.isObject(type) && type.detach) {
+ret = type.detach();
+return (this._yuievt.chain) ? this : true;
+// extra redirection so we catch adaptor events too.  take a look at this.
+} else if (Y.Node && (this instanceof Y.Node) && ((!shorttype) || (shorttype in Y.Node.DOM_EVENTS))) {
+args = Y.Array(arguments, 0, true);
+args[2] = Y.Node.getDOMNode(this);
+return Y.detach.apply(Y, args);
+}
+adapt = Y.Env.evt.plugins[shorttype];
+// The YUI instance handles DOM events and adaptors
+if (this instanceof YUI) {
+args = Y.Array(arguments, 0, true);
+// use the adaptor specific detach code if
+if (adapt && adapt.detach) {
+return adapt.detach.apply(Y, args);
+// DOM event fork
+} else if (!type || (!adapt && type.indexOf(':') == -1)) {
+args[0] = type;
+return Y.Event.detach.apply(Y.Event, args);
+}
+}
+if (type) {
+ce = evts[type];
+if (ce) {
+return ce.detach(fn, context);
+}
+} else {
+for (i in evts) {
+if (evts.hasOwnProperty(i)) {
+ret = ret && evts[i].detach(fn, context);
+}
+}
+return ret;
+}
+return (this._yuievt.chain) ? this : false;
+},
+/**
+* detach a listener
+* @method unsubscribe
+* @deprecated use detach
+*/
+unsubscribe: function() {
+return this.detach.apply(this, arguments);
+},
+/**
+* Removes all listeners from the specified event.  If the event type
+* is not specified, all listeners from all hosted custom events will
+* be removed.
+* @method detachAll
+* @param type {string}   The type, or name of the event
+*/
+detachAll: function(type) {
+type = _getType(type, this._yuievt.config.prefix);
+return this.detach(type);
+},
+/**
+* Removes all listeners from the specified event.  If the event type
+* is not specified, all listeners from all hosted custom events will
+* be removed.
+* @method unsubscribeAll
+* @param type {string}   The type, or name of the event
+* @deprecated use detachAll
+*/
+unsubscribeAll: function() {
+return this.detachAll.apply(this, arguments);
+},
+/**
+* Creates a new custom event of the specified type.  If a custom event
+* by that name already exists, it will not be re-created.  In either
+* case the custom event is returned.
+*
+* @method publish
+*
+* @param type {string} the type, or name of the event
+* @param opts {object} optional config params.  Valid properties are:
+*
+*  <ul>
+*    <li>
+*   'broadcast': whether or not the YUI instance and YUI global are notified when the event is fired (false)
+*    </li>
+*    <li>
+*   'bubbles': whether or not this event bubbles (true)
+*    </li>
+*    <li>
+*   'context': the default execution context for the listeners (this)
+*    </li>
+*    <li>
+*   'defaultFn': the default function to execute when this event fires if preventDefault was not called
+*    </li>
+*    <li>
+*   'emitFacade': whether or not this event emits a facade (false)
+*    </li>
+*    <li>
+*   'prefix': the prefix for this targets events, e.g., 'menu' in 'menu:click'
+*    </li>
+*    <li>
+*   'fireOnce': if an event is configured to fire once, new subscribers after
+*   the fire will be notified immediately.
+*    </li>
+*    <li>
+*   'preventable': whether or not preventDefault() has an effect (true)
+*    </li>
+*    <li>
+*   'preventedFn': a function that is executed when preventDefault is called
+*    </li>
+*    <li>
+*   'queuable': whether or not this event can be queued during bubbling (false)
+*    </li>
+*    <li>
+*   'silent': if silent is true, debug messages are not provided for this event.
+*    </li>
+*    <li>
+*   'stoppedFn': a function that is executed when stopPropagation is called
+*    </li>
+*    <li>
+*   'type': the event type (valid option if not provided as the first parameter to publish)
+*    </li>
+*  </ul>
+*
+*  @return {Event.Custom} the custom event
+*
+*/
+publish: function(type, opts) {
+// this._yuievt.config.prefix
+type = _getType(type, this._yuievt.config.prefix);
+var events, ce, ret, o;
+if (L.isObject(type)) {
+ret = {};
+Y.each(type, function(v, k) {
+ret[k] = this.publish(k, v || opts);
+}, this);
+return ret;
+}
+events = this._yuievt.events;
+ce = events[type];
+//if (ce && !ce.configured) {
+if (ce) {
+// ce.log("publish applying new config to published event: '"+type+"' exists", 'info', 'event');
+if (opts) {
+ce.applyConfig(opts, true);
+}
+} else {
+o = (opts) ?  Y.mix(opts, this._yuievt.defaults) : this._yuievt.defaults;
+// apply defaults
+ce = new Y.CustomEvent(type, o);
+events[type] = ce;
+}
+// make sure we turn the broadcast flag off if this
+// event was published as a result of bubbling
+if (opts instanceof Y.CustomEvent) {
+events[type].broadcast = false;
+}
+return events[type];
+},
+/**
+* Registers another EventTarget as a bubble target.  Bubble order
+* is determined by the order registered.  Multiple targets can
+* be specified.
+* @method addTarget
+* @param o {EventTarget} the target to add
+*/
+addTarget: function(o) {
+this._yuievt.targets[Y.stamp(o)] = o;
+this._yuievt.hasTargets = true;
+},
+/**
+* Removes a bubble target
+* @method removeTarget
+* @param o {EventTarget} the target to remove
+*/
+removeTarget: function(o) {
+delete this._yuievt.targets[Y.stamp(o)];
+},
+/**
+* Fire a custom event by name.  The callback functions will be executed
+* from the context specified when the event was created, and with the
+* following parameters.
+*
+* If the custom event object hasn't been created, then the event hasn't
+* been published and it has no subscribers.  For performance sake, we
+* immediate exit in this case.  This means the event won't bubble, so
+* if the intention is that a bubble target be notified, the event must
+* be published on this object first.
+*
+* @method fire
+* @param type {String|Object} The type of the event, or an object that contains
+* a 'type' property.
+* @param arguments {Object*} an arbitrary set of parameters to pass to
+* the handler.
+* @return {boolean} the return value from Event.Custom.fire
+*
+*/
+fire: function(type) {
+var typeIncluded = L.isString(type),
+t = (typeIncluded) ? type : (type && type.type),
+ce, a, ret;
+t = _getType(t, this._yuievt.config.prefix);
+ce = this.getEvent(t);
+// this event has not been published or subscribed to
+if (!ce) {
+// if this object has bubble targets, we need to publish the
+// event in order for it to bubble.
+if (this._yuievt.hasTargets) {
+// ce = this.publish(t);
+// ce.details = Y.Array(arguments, (typeIncluded) ? 1 : 0, true);
+a = (typeIncluded) ? arguments : Y.Array(arguments, 0, true).unshift(t);
+return this.bubble(null, a, this);
+}
+// otherwise there is nothing to be done
+ret = true;
+} else {
+a = Y.Array(arguments, (typeIncluded) ? 1 : 0, true);
+ret = ce.fire.apply(ce, a);
+// clear target for next fire()
+ce.target = null;
+}
+return (this._yuievt.chain) ? this : ret;
+},
+/**
+* Returns the custom event of the provided type has been created, a
+* falsy value otherwise
+* @method getEvent
+* @param type {string} the type, or name of the event
+* @return {Event.Custom} the custom event or null
+*/
+getEvent: function(type) {
+type = _getType(type, this._yuievt.config.prefix);
+var e = this._yuievt.events;
+return (e && type in e) ? e[type] : null;
+},
+/**
+* Propagate an event
+* @method bubble
+* @param evt {Event.Custom} the custom event to propagate
+* @return {boolean} the aggregated return value from Event.Custom.fire
+*/
+bubble: function(evt, args, target) {
+var targs = this._yuievt.targets, ret = true,
+t, type, ce, i;
+if (!evt || ((!evt.stopped) && targs)) {
+for (i in targs) {
+if (targs.hasOwnProperty(i)) {
+t = targs[i];
+type = evt && evt.type;
+ce = t.getEvent(type);
+// if this event was not published on the bubble target,
+// publish it with sensible default properties
+if (!ce) {
+// publish the event on the bubble target using this event
+// for its configuration
+// ce = t.publish(type, evt);
+// set the host and context appropriately
+// ce.context = (evt.host === evt.context) ? t : evt.context;
+// ce.host = t;
+// clear handlers if specified on this event
+// ce.defaultFn = null;
+// ce.preventedFn = null;
+// ce.stoppedFn = null;
+if (t._yuievt.hasTargets) {
+t.bubble.call(t, evt, args, target);
+}
+} else {
+ce.target = target || (evt && evt.target) || this;
+ce.currentTarget = t;
+ret = ret && ce.fire.apply(ce, args || evt.details);
+// stopPropagation() was called
+if (ce.stopped) {
+break;
+}
+}
+}
+}
+}
+return ret;
+},
+/**
+* Subscribe to a custom event hosted by this object.  The
+* supplied callback will execute after any listeners add
+* via the subscribe method, and after the default function,
+* if configured for the event, has executed.
+* @method after
+* @param type    {string}   The type of the event
+* @param fn {Function} The callback
+* @return the event target or a detach handle per 'chain' config
+*/
+after: function(type, fn) {
+var a = Y.Array(arguments, 0, true);
+switch (L.type(type)) {
+case 'function':
+return Y.Do.after.apply(Y.Do, arguments);
+case 'object':
+a[0]._after = true;
+break;
+default:
+a[0] = AFTER_PREFIX + type;
+}
+return this.on.apply(this, a);
+},
+/**
+* Executes the callback before a DOM event, custom event
+* or method.  If the first argument is a function, it
+* is assumed the target is a method.  For DOM and custom
+* events, this is an alias for Y.on.
+*
+* For DOM and custom events:
+* type, callback, context, 1-n arguments
+*
+* For methods:
+* callback, object (method host), methodName, context, 1-n arguments
+*
+* @method before
+* @return detach handle
+* @deprecated use the on method
+*/
+before: function() {
+return this.on.apply(this, arguments);
+}
+};
+Y.EventTarget = ET;
+// make Y an event target
+Y.mix(Y, ET.prototype, false, false, {
+bubbles: false
+});
+ET.call(Y);
+YUI.Env.globalEvents = YUI.Env.globalEvents || new ET();
+/**
+* Hosts YUI page level events.  This is where events bubble to
+* when the broadcast config is set to 2.  This property is
+* only available if the custom event module is loaded.
+* @property Global
+* @type EventTarget
+* @for YUI
+*/
+Y.Global = YUI.Env.globalEvents;
+// @TODO implement a global namespace function on Y.Global?
+})();
+}, '3.0.0b1' ,{requires:['oop']});

comt