comt: comparison src/cm/media/js/lib/yui/yui3-3.15.0/build/event-custom-base/event-custom-base-debug.js

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src/cm/media/js/lib/yui/yui3-3.15.0/build/event-custom-base/event-custom-base-debug.js

changeset 602

e16a97fb364a

equal deleted inserted replaced

-:d334a616c023
+:e16a97fb364a
+YUI.add('event-custom-base', function (Y, NAME) {
+/**
+* Custom event engine, DOM event listener abstraction layer, synthetic DOM
+* events.
+* @module event-custom
+*/
+Y.Env.evt = {
+handles: {},
+plugins: {}
+};
+/**
+* Custom event engine, DOM event listener abstraction layer, synthetic DOM
+* events.
+* @module event-custom
+* @submodule event-custom-base
+*/
+/**
+* Allows for the insertion of methods that are executed before or after
+* a specified method
+* @class Do
+* @static
+*/
+var DO_BEFORE = 0,
+DO_AFTER = 1,
+DO = {
+/**
+* Cache of objects touched by the utility
+* @property objs
+* @static
+* @deprecated Since 3.6.0. The `_yuiaop` property on the AOP'd object
+* replaces the role of this property, but is considered to be private, and
+* is only mentioned to provide a migration path.
+*
+* If you have a use case which warrants migration to the _yuiaop property,
+* please file a ticket to let us know what it's used for and we can see if
+* we need to expose hooks for that functionality more formally.
+*/
+objs: null,
+/**
+* <p>Execute the supplied method before the specified function.  Wrapping
+* function may optionally return an instance of the following classes to
+* further alter runtime behavior:</p>
+* <dl>
+*     <dt></code>Y.Do.Halt(message, returnValue)</code></dt>
+*         <dd>Immediatly stop execution and return
+*         <code>returnValue</code>.  No other wrapping functions will be
+*         executed.</dd>
+*     <dt></code>Y.Do.AlterArgs(message, newArgArray)</code></dt>
+*         <dd>Replace the arguments that the original function will be
+*         called with.</dd>
+*     <dt></code>Y.Do.Prevent(message)</code></dt>
+*         <dd>Don't execute the wrapped function.  Other before phase
+*         wrappers will be executed.</dd>
+* </dl>
+*
+* @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
+* @param arg* {mixed} 0..n additional arguments to supply to the subscriber
+* when the event fires.
+* @return {string} handle for the subscription
+* @static
+*/
+before: function(fn, obj, sFn, c) {
+// Y.log('Do before: ' + sFn, 'info', 'event');
+var f = fn, a;
+if (c) {
+a = [fn, c].concat(Y.Array(arguments, 4, true));
+f = Y.rbind.apply(Y, a);
+}
+return this._inject(DO_BEFORE, f, obj, sFn);
+},
+/**
+* <p>Execute the supplied method after the specified function.  Wrapping
+* function may optionally return an instance of the following classes to
+* further alter runtime behavior:</p>
+* <dl>
+*     <dt></code>Y.Do.Halt(message, returnValue)</code></dt>
+*         <dd>Immediatly stop execution and return
+*         <code>returnValue</code>.  No other wrapping functions will be
+*         executed.</dd>
+*     <dt></code>Y.Do.AlterReturn(message, returnValue)</code></dt>
+*         <dd>Return <code>returnValue</code> instead of the wrapped
+*         method's original return value.  This can be further altered by
+*         other after phase wrappers.</dd>
+* </dl>
+*
+* <p>The static properties <code>Y.Do.originalRetVal</code> and
+* <code>Y.Do.currentRetVal</code> will be populated for reference.</p>
+*
+* @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
+* @param arg* {mixed} 0..n additional arguments to supply to the subscriber
+* @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(DO_AFTER, f, obj, sFn);
+},
+/**
+* Execute the supplied method before or after the specified function.
+* Used by <code>before</code> and <code>after</code>.
+*
+* @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 (!obj._yuiaop) {
+// create a map entry for the obj if it doesn't exist, to hold overridden methods
+obj._yuiaop = {};
+}
+o = obj._yuiaop;
+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
+* @static
+*/
+detach: function(handle) {
+if (handle.detach) {
+handle.detach();
+}
+}
+};
+Y.Do = DO;
+//////////////////////////////////////////////////////////////////////////
+/**
+* Contains the return value from the wrapped method, accessible
+* by 'after' event listeners.
+*
+* @property originalRetVal
+* @static
+* @since 3.2.0
+*/
+/**
+* Contains the current state of the return value, consumable by
+* 'after' event listeners, and updated if an after subscriber
+* changes the return value generated by the wrapped function.
+*
+* @property currentRetVal
+* @static
+* @since 3.2.0
+*/
+//////////////////////////////////////////////////////////////////////////
+/**
+* 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
+*/
+DO.Method = function(obj, sFn) {
+this.obj = obj;
+this.methodName = sFn;
+this.method = obj[sFn];
+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
+*/
+DO.Method.prototype.register = function (sid, fn, when) {
+if (when) {
+this.after[sid] = fn;
+} else {
+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
+*/
+DO.Method.prototype._delete = function (sid) {
+// Y.log('Y.Do._delete: ' + sid, 'info', 'Event');
+delete this.before[sid];
+delete this.after[sid];
+};
+/**
+* <p>Execute the wrapped method.  All arguments are passed into the wrapping
+* functions.  If any of the before wrappers return an instance of
+* <code>Y.Do.Halt</code> or <code>Y.Do.Prevent</code>, neither the wrapped
+* function nor any after phase subscribers will be executed.</p>
+*
+* <p>The return value will be the return value of the wrapped function or one
+* provided by a wrapper function via an instance of <code>Y.Do.Halt</code> or
+* <code>Y.Do.AlterReturn</code>.
+*
+* @method exec
+* @param arg* {any} Arguments are passed to the wrapping and wrapped functions
+* @return {any} Return value of wrapped function unless overwritten (see above)
+*/
+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 DO.Halt:
+return ret.retVal;
+case DO.AlterArgs:
+args = ret.newArgs;
+break;
+case DO.Prevent:
+prevented = true;
+break;
+default:
+}
+}
+}
+}
+// execute method
+if (!prevented) {
+ret = this.method.apply(this.obj, args);
+}
+DO.originalRetVal = ret;
+DO.currentRetVal = ret;
+// 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 === DO.Halt) {
+return newRet.retVal;
+// Check for a new return value
+} else if (newRet && newRet.constructor === DO.AlterReturn) {
+ret = newRet.newRetVal;
+// Update the static retval state
+DO.currentRetVal = ret;
+}
+}
+}
+return ret;
+};
+//////////////////////////////////////////////////////////////////////////
+/**
+* Return an AlterArgs object when you want to change the arguments that
+* were passed into the function.  Useful for Do.before subscribers.  An
+* example would be a service that scrubs out illegal characters prior to
+* executing the core business logic.
+* @class Do.AlterArgs
+* @constructor
+* @param msg {String} (optional) Explanation of the altered return value
+* @param newArgs {Array} Call parameters to be used for the original method
+*                        instead of the arguments originally passed in.
+*/
+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.  Useful for Do.after subscribers.
+* @class Do.AlterReturn
+* @constructor
+* @param msg {String} (optional) Explanation of the altered return value
+* @param newRetVal {any} Return value passed to code that invoked the wrapped
+*                      function.
+*/
+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.  Useful for Do.before subscribers.
+* @class Do.Halt
+* @constructor
+* @param msg {String} (optional) Explanation of why the termination was done
+* @param retVal {any} Return value passed to code that invoked the wrapped
+*                      function.
+*/
+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.  Useful
+* for Do.before subscribers.
+* @class Do.Prevent
+* @constructor
+* @param msg {String} (optional) Explanation of why the termination was done
+*/
+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
+* @constructor
+* @param msg {String} (optional) Explanation of the altered return value
+* @param retVal {any} Return value passed to code that invoked the wrapped
+*                      function.
+* @deprecated use Y.Do.Halt or Y.Do.Prevent
+*/
+DO.Error = DO.Halt;
+//////////////////////////////////////////////////////////////////////////
+/**
+* Custom event engine, DOM event listener abstraction layer, synthetic DOM
+* events.
+* @module event-custom
+* @submodule event-custom-base
+*/
+// var onsubscribeType = "_event:onsub",
+var YArray = Y.Array,
+AFTER = 'after',
+CONFIGS = [
+'broadcast',
+'monitored',
+'bubbles',
+'context',
+'contextFn',
+'currentTarget',
+'defaultFn',
+'defaultTargetOnly',
+'details',
+'emitFacade',
+'fireOnce',
+'async',
+'host',
+'preventable',
+'preventedFn',
+'queuable',
+'silent',
+'stoppedFn',
+'target',
+'type'
+],
+CONFIGS_HASH = YArray.hash(CONFIGS),
+nativeSlice = Array.prototype.slice,
+YUI3_SIGNATURE = 9,
+YUI_LOG = 'yui:log',
+mixConfigs = function(r, s, ov) {
+var p;
+for (p in s) {
+if (CONFIGS_HASH[p] && (ov || !(p in r))) {
+r[p] = s[p];
+}
+}
+return r;
+};
+/**
+* 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 {object} defaults configuration object.
+* @class CustomEvent
+* @constructor
+*/
+/**
+* The type of event, returned to subscribers when the event fires
+* @property type
+* @type string
+*/
+/**
+* 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
+*/
+Y.CustomEvent = function(type, defaults) {
+this._kds = Y.CustomEvent.keepDeprecatedSubs;
+this.id = Y.guid();
+this.type = type;
+this.silent = this.logSystem = (type === YUI_LOG);
+if (this._kds) {
+/**
+* The subscribers to this event
+* @property subscribers
+* @type Subscriber {}
+* @deprecated
+*/
+/**
+* 'After' subscribers
+* @property afters
+* @type Subscriber {}
+* @deprecated
+*/
+this.subscribers = {};
+this.afters = {};
+}
+if (defaults) {
+mixConfigs(this, defaults, true);
+}
+};
+/**
+* Static flag to enable population of the <a href="#property_subscribers">`subscribers`</a>
+* and  <a href="#property_subscribers">`afters`</a> properties held on a `CustomEvent` instance.
+*
+* These properties were changed to private properties (`_subscribers` and `_afters`), and
+* converted from objects to arrays for performance reasons.
+*
+* Setting this property to true will populate the deprecated `subscribers` and `afters`
+* properties for people who may be using them (which is expected to be rare). There will
+* be a performance hit, compared to the new array based implementation.
+*
+* If you are using these deprecated properties for a use case which the public API
+* does not support, please file an enhancement request, and we can provide an alternate
+* public implementation which doesn't have the performance cost required to maintiain the
+* properties as objects.
+*
+* @property keepDeprecatedSubs
+* @static
+* @for CustomEvent
+* @type boolean
+* @default false
+* @deprecated
+*/
+Y.CustomEvent.keepDeprecatedSubs = false;
+Y.CustomEvent.mixConfigs = mixConfigs;
+Y.CustomEvent.prototype = {
+constructor: Y.CustomEvent,
+/**
+* Monitor when an event is attached or detached.
+*
+* @property monitored
+* @type boolean
+*/
+/**
+* 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
+*/
+/**
+* Specifies whether this event should be queued when the host is actively
+* processing an event.  This will effect exectution order of the callbacks
+* for the various events.
+* @property queuable
+* @type boolean
+* @default false
+*/
+/**
+* This event has fired if true
+*
+* @property fired
+* @type boolean
+* @default false;
+*/
+/**
+* An array containing the arguments the custom event
+* was last fired with.
+* @property firedWith
+* @type Array
+*/
+/**
+* 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;
+*/
+/**
+* fireOnce listeners will fire syncronously unless async
+* is set to true
+* @property async
+* @type boolean
+* @default 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
+*/
+/**
+* Flag for preventDefault that is modified during fire().
+* if it is not 0, the default behavior for this event
+* @property prevented
+* @type int
+*/
+/**
+* Specifies the host for this custom event.  This is used
+* to enable event bubbling
+* @property host
+* @type EventTarget
+*/
+/**
+* The default function to execute after event listeners
+* have fire, but only if the default action was not
+* prevented.
+* @property defaultFn
+* @type Function
+*/
+/**
+* Flag for the default function to execute only if the
+* firing event is the current target. This happens only
+* when using custom event delegation and setting the
+* flag to `true` mimics the behavior of event delegation
+* in the DOM.
+*
+* @property defaultTargetOnly
+* @type Boolean
+* @default false
+*/
+/**
+* The function to execute if a subscriber calls
+* stopPropagation or stopImmediatePropagation
+* @property stoppedFn
+* @type Function
+*/
+/**
+* The function to execute if a subscriber calls
+* preventDefault
+* @property preventedFn
+* @type Function
+*/
+/**
+* The subscribers to this event
+* @property _subscribers
+* @type Subscriber []
+* @private
+*/
+/**
+* 'After' subscribers
+* @property _afters
+* @type Subscriber []
+* @private
+*/
+/**
+* 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
+*/
+/**
+* Supports multiple options for listener signatures in order to
+* port YUI 2 apps.
+* @property signature
+* @type int
+* @default 9
+*/
+signature : YUI3_SIGNATURE,
+/**
+* The context the the event will fire from by default.  Defaults to the YUI
+* instance.
+* @property context
+* @type object
+*/
+context : Y,
+/**
+* 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
+*/
+preventable : true,
+/**
+* Specifies whether or not a subscriber can stop the event propagation
+* via stopPropagation(), stopImmediatePropagation(), or halt()
+*
+* Events can only bubble if emitFacade is true.
+*
+* @property bubbles
+* @type boolean
+* @default true
+*/
+bubbles : true,
+/**
+* Returns the number of subscribers for this event as the sum of the on()
+* subscribers and after() subscribers.
+*
+* @method hasSubs
+* @return Number
+*/
+hasSubs: function(when) {
+var s = 0,
+a = 0,
+subs = this._subscribers,
+afters = this._afters,
+sib = this.sibling;
+if (subs) {
+s = subs.length;
+}
+if (afters) {
+a = afters.length;
+}
+if (sib) {
+subs = sib._subscribers;
+afters = sib._afters;
+if (subs) {
+s += subs.length;
+}
+if (afters) {
+a += afters.length;
+}
+}
+if (when) {
+return (when === 'after') ? a : s;
+}
+return (s + a);
+},
+/**
+* Monitor the event state for the subscribed event.  The first parameter
+* is what should be monitored, the rest are the normal parameters when
+* subscribing to an event.
+* @method monitor
+* @param what {string} what to monitor ('detach', 'attach', 'publish').
+* @return {EventHandle} return value from the monitor event subscription.
+*/
+monitor: function(what) {
+this.monitored = true;
+var type = this.id + '|' + this.type + '_' + what,
+args = nativeSlice.call(arguments, 0);
+args[0] = type;
+return this.host.on.apply(this.host, args);
+},
+/**
+* Get all of the subscribers to this event and any sibling event
+* @method getSubs
+* @return {Array} first item is the on subscribers, second the after.
+*/
+getSubs: function() {
+var sibling = this.sibling,
+subs = this._subscribers,
+afters = this._afters,
+siblingSubs,
+siblingAfters;
+if (sibling) {
+siblingSubs = sibling._subscribers;
+siblingAfters = sibling._afters;
+}
+if (siblingSubs) {
+if (subs) {
+subs = subs.concat(siblingSubs);
+} else {
+subs = siblingSubs.concat();
+}
+} else {
+if (subs) {
+subs = subs.concat();
+} else {
+subs = [];
+}
+}
+if (siblingAfters) {
+if (afters) {
+afters = afters.concat(siblingAfters);
+} else {
+afters = siblingAfters.concat();
+}
+} else {
+if (afters) {
+afters = afters.concat();
+} else {
+afters = [];
+}
+}
+return [subs, afters];
+},
+/**
+* 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) {
+mixConfigs(this, o, force);
+},
+/**
+* Create the Subscription for subscribing function, context, and bound
+* arguments.  If this is a fireOnce event, the subscriber is immediately
+* notified.
+*
+* @method _on
+* @param fn {Function} Subscription callback
+* @param [context] {Object} Override `this` in the callback
+* @param [args] {Array} bound arguments that will be passed to the callback after the arguments generated by fire()
+* @param [when] {String} "after" to slot into after subscribers
+* @return {EventHandle}
+* @protected
+*/
+_on: function(fn, context, args, when) {
+if (!fn) { this.log('Invalid callback for CE: ' + this.type); }
+var s = new Y.Subscriber(fn, context, args, when),
+firedWith;
+if (this.fireOnce && this.fired) {
+firedWith = this.firedWith;
+// It's a little ugly for this to know about facades,
+// but given the current breakup, not much choice without
+// moving a whole lot of stuff around.
+if (this.emitFacade && this._addFacadeToArgs) {
+this._addFacadeToArgs(firedWith);
+}
+if (this.async) {
+setTimeout(Y.bind(this._notify, this, s, firedWith), 0);
+} else {
+this._notify(s, firedWith);
+}
+}
+if (when === AFTER) {
+if (!this._afters) {
+this._afters = [];
+}
+this._afters.push(s);
+} else {
+if (!this._subscribers) {
+this._subscribers = [];
+}
+this._subscribers.push(s);
+}
+if (this._kds) {
+if (when === AFTER) {
+this.afters[s.id] = s;
+} else {
+this.subscribers[s.id] = s;
+}
+}
+return new Y.EventHandle(this, s);
+},
+/**
+* Listen for this event
+* @method subscribe
+* @param {Function} fn The function to execute.
+* @return {EventHandle} Unsubscribe handle.
+* @deprecated use on.
+*/
+subscribe: function(fn, context) {
+Y.log('ce.subscribe deprecated, use "on"', 'warn', 'deprecated');
+var a = (arguments.length > 2) ? nativeSlice.call(arguments, 2) : null;
+return this._on(fn, context, a, true);
+},
+/**
+* Listen for this event
+* @method on
+* @param {Function} fn The function to execute.
+* @param {object} context optional execution context.
+* @param {mixed} arg* 0..n additional arguments to supply to the subscriber
+* when the event fires.
+* @return {EventHandle} An object with a detach method to detch the handler(s).
+*/
+on: function(fn, context) {
+var a = (arguments.length > 2) ? nativeSlice.call(arguments, 2) : null;
+if (this.monitored && this.host) {
+this.host._monitor('attach', this, {
+args: arguments
+});
+}
+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.
+* @param {object} context optional execution context.
+* @param {mixed} arg* 0..n additional arguments to supply to the subscriber
+* when the event fires.
+* @return {EventHandle} handle Unsubscribe handle.
+*/
+after: function(fn, context) {
+var a = (arguments.length > 2) ? nativeSlice.call(arguments, 2) : 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 {Number} returns the number of subscribers unsubscribed.
+*/
+detach: function(fn, context) {
+// unsubscribe handle
+if (fn && fn.detach) {
+return fn.detach();
+}
+var i, s,
+found = 0,
+subs = this._subscribers,
+afters = this._afters;
+if (subs) {
+for (i = subs.length; i >= 0; i--) {
+s = subs[i];
+if (s && (!fn || fn === s.fn)) {
+this._delete(s, subs, i);
+found++;
+}
+}
+}
+if (afters) {
+for (i = afters.length; i >= 0; i--) {
+s = afters[i];
+if (s && (!fn || fn === s.fn)) {
+this._delete(s, afters, i);
+found++;
+}
+}
+}
+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 {int|undefined} returns the number of subscribers unsubscribed.
+* @deprecated use detach.
+*/
+unsubscribe: function() {
+return this.detach.apply(this, arguments);
+},
+/**
+* Notify a single subscriber
+* @method _notify
+* @param {Subscriber} s the subscriber.
+* @param {Array} args the arguments array to apply to the listener.
+* @protected
+*/
+_notify: function(s, args, ef) {
+this.log(this.type + '->' + 'sub: ' + s.id);
+var ret;
+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 {string} msg message to log.
+* @param {string} cat log category.
+*/
+log: function(msg, cat) {
+if (!this.silent) { Y.log(this.id + ': ' + msg, cat || 'info', 'event'); }
+},
+/**
+* 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() {
+// push is the fastest way to go from arguments to arrays
+// for most browsers currently
+// http://jsperf.com/push-vs-concat-vs-slice/2
+var args = [];
+args.push.apply(args, arguments);
+return this._fire(args);
+},
+/**
+* Private internal implementation for `fire`, which is can be used directly by
+* `EventTarget` and other event module classes which have already converted from
+* an `arguments` list to an array, to avoid the repeated overhead.
+*
+* @method _fire
+* @private
+* @param {Array} args The array of arguments passed to be passed to handlers.
+* @return {boolean} false if one of the subscribers returned false, true otherwise.
+*/
+_fire: function(args) {
+if (this.fireOnce && this.fired) {
+this.log('fireOnce event: ' + this.type + ' already fired');
+return true;
+} else {
+// this doesn't happen if the event isn't published
+// this.host._monitor('fire', this.type, args);
+this.fired = true;
+if (this.fireOnce) {
+this.firedWith = args;
+}
+if (this.emitFacade) {
+return this.fireComplex(args);
+} else {
+return this.fireSimple(args);
+}
+}
+},
+/**
+* Set up for notifying subscribers of non-emitFacade events.
+*
+* @method fireSimple
+* @param args {Array} Arguments passed to fire()
+* @return Boolean false if a subscriber returned false
+* @protected
+*/
+fireSimple: function(args) {
+this.stopped = 0;
+this.prevented = 0;
+if (this.hasSubs()) {
+var subs = this.getSubs();
+this._procSubs(subs[0], args);
+this._procSubs(subs[1], args);
+}
+if (this.broadcast) {
+this._broadcast(args);
+}
+return this.stopped ? false : true;
+},
+// Requires the event-custom-complex module for full funcitonality.
+fireComplex: function(args) {
+this.log('Missing event-custom-complex needed to emit a facade for: ' + this.type);
+args[0] = args[0] || {};
+return this.fireSimple(args);
+},
+/**
+* Notifies a list of subscribers.
+*
+* @method _procSubs
+* @param subs {Array} List of subscribers
+* @param args {Array} Arguments passed to fire()
+* @param ef {}
+* @return Boolean false if a subscriber returns false or stops the event
+*              propagation via e.stopPropagation(),
+*              e.stopImmediatePropagation(), or e.halt()
+* @private
+*/
+_procSubs: function(subs, args, ef) {
+var s, i, l;
+for (i = 0, l = subs.length; i < l; i++) {
+s = subs[i];
+if (s && s.fn) {
+if (false === this._notify(s, args, ef)) {
+this.stopped = 2;
+}
+if (this.stopped === 2) {
+return false;
+}
+}
+}
+return true;
+},
+/**
+* Notifies the YUI instance if the event is configured with broadcast = 1,
+* and both the YUI instance and Y.Global if configured with broadcast = 2.
+*
+* @method _broadcast
+* @param args {Array} Arguments sent to fire()
+* @private
+*/
+_broadcast: function(args) {
+if (!this.stopped && this.broadcast) {
+var a = args.concat();
+a.unshift(this.type);
+if (this.host !== Y) {
+Y.fire.apply(Y, a);
+}
+if (this.broadcast === 2) {
+Y.Global.fire.apply(Y.Global, a);
+}
+}
+},
+/**
+* Removes all listeners
+* @method unsubscribeAll
+* @return {Number} The number of listeners unsubscribed.
+* @deprecated use detachAll.
+*/
+unsubscribeAll: function() {
+return this.detachAll.apply(this, arguments);
+},
+/**
+* Removes all listeners
+* @method detachAll
+* @return {Number} The number of listeners unsubscribed.
+*/
+detachAll: function() {
+return this.detach();
+},
+/**
+* Deletes the subscriber from the internal store of on() and after()
+* subscribers.
+*
+* @method _delete
+* @param s subscriber object.
+* @param subs (optional) on or after subscriber array
+* @param index (optional) The index found.
+* @private
+*/
+_delete: function(s, subs, i) {
+var when = s._when;
+if (!subs) {
+subs = (when === AFTER) ? this._afters : this._subscribers;
+}
+if (subs) {
+i = YArray.indexOf(subs, s, 0);
+if (s && subs[i] === s) {
+subs.splice(i, 1);
+}
+}
+if (this._kds) {
+if (when === AFTER) {
+delete this.afters[s.id];
+} else {
+delete this.subscribers[s.id];
+}
+}
+if (this.monitored && this.host) {
+this.host._monitor('detach', this, {
+ce: this,
+sub: s
+});
+}
+if (s) {
+s.deleted = true;
+}
+}
+};
+/**
+* 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, when) {
+/**
+* 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.guid();
+/**
+* Additional arguments to propagate to the subscriber
+* @property args
+* @type Array
+*/
+this.args = args;
+this._when = when;
+/**
+* Custom events for a given fire transaction.
+* @property events
+* @type {EventTarget}
+*/
+// this.events = null;
+/**
+* This listener only reacts to the event once
+* @property once
+*/
+// this.once = false;
+};
+Y.Subscriber.prototype = {
+constructor: Y.Subscriber,
+_notify: function(c, args, ce) {
+if (this.deleted && !this.postponed) {
+if (this.postponed) {
+delete this.fn;
+delete this.context;
+} else {
+delete this.postponed;
+return null;
+}
+}
+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);
+}
+}
+if (this.once) {
+ce._delete(this);
+}
+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;
+}
+// only catch errors if we will not re-throw them.
+if (Y.config && 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);
+}
+},
+valueOf : function() {
+return this.id;
+}
+};
+/**
+* Return value from all subscribe operations
+* @class EventHandle
+* @constructor
+* @param {CustomEvent} evt the custom event.
+* @param {Subscriber} sub the subscriber.
+*/
+Y.EventHandle = function(evt, sub) {
+/**
+* The custom event
+*
+* @property evt
+* @type CustomEvent
+*/
+this.evt = evt;
+/**
+* The subscriber object
+*
+* @property sub
+* @type Subscriber
+*/
+this.sub = sub;
+};
+Y.EventHandle.prototype = {
+batch: function(f, c) {
+f.call(c || this, this);
+if (Y.Lang.isArray(this.evt)) {
+Y.Array.each(this.evt, function(h) {
+h.batch.call(c || h, f);
+});
+}
+},
+/**
+* Detaches this subscriber
+* @method detach
+* @return {Number} the number of detached listeners
+*/
+detach: function() {
+var evt = this.evt, detached = 0, i;
+if (evt) {
+// Y.log('EventHandle.detach: ' + this.sub, 'info', 'Event');
+if (Y.Lang.isArray(evt)) {
+for (i = 0; i < evt.length; i++) {
+detached += evt[i].detach();
+}
+} else {
+evt._delete(this.sub);
+detached = 1;
+}
+}
+return detached;
+},
+/**
+* Monitor the event state for the subscribed event.  The first parameter
+* is what should be monitored, the rest are the normal parameters when
+* subscribing to an event.
+* @method monitor
+* @param what {string} what to monitor ('attach', 'detach', 'publish').
+* @return {EventHandle} return value from the monitor event subscription.
+*/
+monitor: function(what) {
+return this.evt.monitor.apply(this.evt, arguments);
+}
+};
+/**
+* Custom event engine, DOM event listener abstraction layer, synthetic DOM
+* events.
+* @module event-custom
+* @submodule event-custom-base
+*/
+/**
+* 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
+*/
+var L = Y.Lang,
+PREFIX_DELIMITER = ':',
+CATEGORY_DELIMITER = '|',
+AFTER_PREFIX = '~AFTER~',
+WILD_TYPE_RE = /(.*?)(:)(.*?)/,
+_wildType = Y.cached(function(type) {
+return type.replace(WILD_TYPE_RE, "*$2$3");
+}),
+/**
+* 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 = function(type, pre) {
+if (!pre || !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;
+if (!L.isString(t)) {
+return t;
+}
+i = t.indexOf(AFTER_PREFIX);
+if (i > -1) {
+after = true;
+t = t.substr(AFTER_PREFIX.length);
+}
+i = t.indexOf(CATEGORY_DELIMITER);
+if (i > -1) {
+detachcategory = t.substr(0, (i));
+t = t.substr(i+1);
+if (t === '*') {
+t = null;
+}
+}
+// detach category, full type with instance prefix, is this an after listener, short type
+return [detachcategory, (pre) ? _getType(t, pre) : t, after, t];
+}),
+ET = function(opts) {
+var etState = this._yuievt,
+etConfig;
+if (!etState) {
+etState = this._yuievt = {
+events: {},    // PERF: Not much point instantiating lazily. We're bound to have events
+targets: null, // PERF: Instantiate lazily, if user actually adds target,
+config: {
+host: this,
+context: this
+},
+chain: Y.config.chain
+};
+}
+etConfig = etState.config;
+if (opts) {
+mixConfigs(etConfig, opts, true);
+if (opts.chain !== undefined) {
+etState.chain = opts.chain;
+}
+if (opts.prefix) {
+etConfig.prefix = opts.prefix;
+}
+}
+};
+ET.prototype = {
+constructor: ET,
+/**
+* Listen to a custom event hosted by this object one time.
+* This is the equivalent to <code>on</code> except the
+* listener is immediatelly detached when it is executed.
+* @method once
+* @param {String} type The name of the event
+* @param {Function} fn The callback to execute in response to the event
+* @param {Object} [context] Override `this` object in callback
+* @param {Any} [arg*] 0..n additional arguments to supply to the subscriber
+* @return {EventHandle} A subscription handle capable of detaching the
+*                       subscription
+*/
+once: function() {
+var handle = this.on.apply(this, arguments);
+handle.batch(function(hand) {
+if (hand.sub) {
+hand.sub.once = true;
+}
+});
+return handle;
+},
+/**
+* Listen to a custom event hosted by this object one time.
+* This is the equivalent to <code>after</code> except the
+* listener is immediatelly detached when it is executed.
+* @method onceAfter
+* @param {String} type The name of the event
+* @param {Function} fn The callback to execute in response to the event
+* @param {Object} [context] Override `this` object in callback
+* @param {Any} [arg*] 0..n additional arguments to supply to the subscriber
+* @return {EventHandle} A subscription handle capable of detaching that
+*                       subscription
+*/
+onceAfter: function() {
+var handle = this.after.apply(this, arguments);
+handle.batch(function(hand) {
+if (hand.sub) {
+hand.sub.once = true;
+}
+});
+return handle;
+},
+/**
+* Takes the type parameter passed to 'on' and parses out the
+* various pieces that could be included in the type.  If the
+* event type is passed without a prefix, it will be expanded
+* to include the prefix one is supplied or the event target
+* is configured with a default prefix.
+* @method parseType
+* @param {String} type the type
+* @param {String} [pre] The prefix. Defaults to this._yuievt.config.prefix
+* @since 3.3.0
+* @return {Array} an array containing:
+*  * the detach category, if supplied,
+*  * the prefixed event type,
+*  * whether or not this is an after listener,
+*  * the supplied event type
+*/
+parseType: function(type, pre) {
+return _parseType(type, pre || this._yuievt.config.prefix);
+},
+/**
+* Subscribe a callback function to a custom event fired by this object or
+* from an object that bubbles its events to this object.
+*
+* Callback functions for events published with `emitFacade = true` will
+* receive an `EventFacade` as the first argument (typically named "e").
+* These callbacks can then call `e.preventDefault()` to disable the
+* behavior published to that event's `defaultFn`.  See the `EventFacade`
+* API for all available properties and methods. Subscribers to
+* non-`emitFacade` events will receive the arguments passed to `fire()`
+* after the event name.
+*
+* To subscribe to multiple events at once, pass an object as the first
+* argument, where the key:value pairs correspond to the eventName:callback,
+* or pass an array of event names as the first argument to subscribe to
+* all listed events with the same callback.
+*
+* Returning `false` from a callback is supported as an alternative to
+* calling `e.preventDefault(); e.stopPropagation();`.  However, it is
+* recommended to use the event methods whenever possible.
+*
+* @method on
+* @param {String} type The name of the event
+* @param {Function} fn The callback to execute in response to the event
+* @param {Object} [context] Override `this` object in callback
+* @param {Any} [arg*] 0..n additional arguments to supply to the subscriber
+* @return {EventHandle} A subscription handle capable of detaching that
+*                       subscription
+*/
+on: function(type, fn, context) {
+var yuievt = this._yuievt,
+parts = _parseType(type, yuievt.config.prefix), f, c, args, ret, ce,
+detachcategory, handle, store = Y.Env.evt.handles, after, adapt, shorttype,
+Node = Y.Node, n, domevent, isArr;
+// full name, args, detachcategory, after
+this._monitor('attach', parts[1], {
+args: arguments,
+category: parts[0],
+after: parts[2]
+});
+if (L.isObject(type)) {
+if (L.isFunction(type)) {
+return Y.Do.before.apply(Y.Do, arguments);
+}
+f = fn;
+c = context;
+args = nativeSlice.call(arguments, 0);
+ret = [];
+if (L.isArray(type)) {
+isArr = true;
+}
+after = type._after;
+delete type._after;
+Y.each(type, function(v, k) {
+if (L.isObject(v)) {
+f = v.fn || ((L.isFunction(v)) ? v : f);
+c = v.context || c;
+}
+var nv = (after) ? AFTER_PREFIX : '';
+args[0] = nv + ((isArr) ? v : k);
+args[1] = f;
+args[2] = c;
+ret.push(this.on.apply(this, args));
+}, this);
+return (yuievt.chain) ? this : new Y.EventHandle(ret);
+}
+detachcategory = parts[0];
+after = parts[2];
+shorttype = parts[3];
+// extra redirection so we catch adaptor events too.  take a look at this.
+if (Node && Y.instanceOf(this, Node) && (shorttype in Node.DOM_EVENTS)) {
+args = nativeSlice.call(arguments, 0);
+args.splice(2, 0, Node.getDOMNode(this));
+// Y.log("Node detected, redirecting with these args: " + args);
+return Y.on.apply(Y, args);
+}
+type = parts[1];
+if (Y.instanceOf(this, YUI)) {
+adapt = Y.Env.evt.plugins[type];
+args  = nativeSlice.call(arguments, 0);
+args[0] = shorttype;
+if (Node) {
+n = args[2];
+if (Y.instanceOf(n, Y.NodeList)) {
+n = Y.NodeList.getDOMNodes(n);
+} else if (Y.instanceOf(n, Node)) {
+n = Node.getDOMNode(n);
+}
+domevent = (shorttype in Node.DOM_EVENTS);
+// Captures both DOM events and event plugins.
+if (domevent) {
+args[2] = n;
+}
+}
+// check for the existance of an event adaptor
+if (adapt) {
+Y.log('Using adaptor for ' + shorttype + ', ' + n, 'info', 'event');
+handle = adapt.on.apply(Y, args);
+} else if ((!type) || domevent) {
+handle = Y.Event._attach(args);
+}
+}
+if (!handle) {
+ce = yuievt.events[type] || this.publish(type);
+handle = ce._on(fn, context, (arguments.length > 3) ? nativeSlice.call(arguments, 3) : null, (after) ? 'after' : true);
+// TODO: More robust regex, accounting for category
+if (type.indexOf("*:") !== -1) {
+this._hasSiblings = true;
+}
+}
+if (detachcategory) {
+store[detachcategory] = store[detachcategory] || {};
+store[detachcategory][type] = store[detachcategory][type] || [];
+store[detachcategory][type].push(handle);
+}
+return (yuievt.chain) ? this : handle;
+},
+/**
+* subscribe to an event
+* @method subscribe
+* @deprecated use on
+*/
+subscribe: function() {
+Y.log('EventTarget subscribe() is deprecated, use on()', 'warn', 'deprecated');
+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 evts = this._yuievt.events,
+i,
+Node = Y.Node,
+isNode = Node && (Y.instanceOf(this, Node));
+// detachAll disabled on the Y instance.
+if (!type && (this !== Y)) {
+for (i in evts) {
+if (evts.hasOwnProperty(i)) {
+evts[i].detach(fn, context);
+}
+}
+if (isNode) {
+Y.Event.purgeElement(Node.getDOMNode(this));
+}
+return this;
+}
+var parts = _parseType(type, this._yuievt.config.prefix),
+detachcategory = L.isArray(parts) ? parts[0] : null,
+shorttype = (parts) ? parts[3] : null,
+adapt, store = Y.Env.evt.handles, detachhost, cat, args,
+ce,
+keyDetacher = function(lcat, ltype, host) {
+var handles = lcat[ltype], ce, i;
+if (handles) {
+for (i = handles.length - 1; i >= 0; --i) {
+ce = handles[i].evt;
+if (ce.host === host || ce.el === host) {
+handles[i].detach();
+}
+}
+}
+};
+if (detachcategory) {
+cat = store[detachcategory];
+type = parts[1];
+detachhost = (isNode) ? Y.Node.getDOMNode(this) : this;
+if (cat) {
+if (type) {
+keyDetacher(cat, type, detachhost);
+} else {
+for (i in cat) {
+if (cat.hasOwnProperty(i)) {
+keyDetacher(cat, i, detachhost);
+}
+}
+}
+return this;
+}
+// If this is an event handle, use it to detach
+} else if (L.isObject(type) && type.detach) {
+type.detach();
+return this;
+// extra redirection so we catch adaptor events too.  take a look at this.
+} else if (isNode && ((!shorttype) || (shorttype in Node.DOM_EVENTS))) {
+args = nativeSlice.call(arguments, 0);
+args[2] = Node.getDOMNode(this);
+Y.detach.apply(Y, args);
+return this;
+}
+adapt = Y.Env.evt.plugins[shorttype];
+// The YUI instance handles DOM events and adaptors
+if (Y.instanceOf(this, YUI)) {
+args = nativeSlice.call(arguments, 0);
+// use the adaptor specific detach code if
+if (adapt && adapt.detach) {
+adapt.detach.apply(Y, args);
+return this;
+// DOM event fork
+} else if (!type || (!adapt && Node && (type in Node.DOM_EVENTS))) {
+args[0] = type;
+Y.Event.detach.apply(Y.Event, args);
+return this;
+}
+}
+// ce = evts[type];
+ce = evts[parts[1]];
+if (ce) {
+ce.detach(fn, context);
+}
+return this;
+},
+/**
+* detach a listener
+* @method unsubscribe
+* @deprecated use detach
+*/
+unsubscribe: function() {
+Y.log('EventTarget unsubscribe() is deprecated, use detach()', 'warn', 'deprecated');
+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) {
+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() {
+Y.log('EventTarget unsubscribeAll() is deprecated, use detachAll()', 'warn', 'deprecated');
+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)
+*              Events can only bubble if emitFacade is 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>
+*   'async': fireOnce event listeners will fire synchronously if the event has already
+*    fired unless async is true.
+*    </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>
+*   'monitored': specifies whether or not this event should send notifications about
+*   when the event has been attached, detached, or published.
+*    </li>
+*    <li>
+*   'type': the event type (valid option if not provided as the first parameter to publish)
+*    </li>
+*  </ul>
+*
+*  @return {CustomEvent} the custom event
+*
+*/
+publish: function(type, opts) {
+var ret,
+etState = this._yuievt,
+etConfig = etState.config,
+pre = etConfig.prefix;
+if (typeof type === "string")  {
+if (pre) {
+type = _getType(type, pre);
+}
+ret = this._publish(type, etConfig, opts);
+} else {
+ret = {};
+Y.each(type, function(v, k) {
+if (pre) {
+k = _getType(k, pre);
+}
+ret[k] = this._publish(k, etConfig, v || opts);
+}, this);
+}
+return ret;
+},
+/**
+* Returns the fully qualified type, given a short type string.
+* That is, returns "foo:bar" when given "bar" if "foo" is the configured prefix.
+*
+* NOTE: This method, unlike _getType, does no checking of the value passed in, and
+* is designed to be used with the low level _publish() method, for critical path
+* implementations which need to fast-track publish for performance reasons.
+*
+* @method _getFullType
+* @private
+* @param {String} type The short type to prefix
+* @return {String} The prefixed type, if a prefix is set, otherwise the type passed in
+*/
+_getFullType : function(type) {
+var pre = this._yuievt.config.prefix;
+if (pre) {
+return pre + PREFIX_DELIMITER + type;
+} else {
+return type;
+}
+},
+/**
+* The low level event publish implementation. It expects all the massaging to have been done
+* outside of this method. e.g. the `type` to `fullType` conversion. It's designed to be a fast
+* path publish, which can be used by critical code paths to improve performance.
+*
+* @method _publish
+* @private
+* @param {String} fullType The prefixed type of the event to publish.
+* @param {Object} etOpts The EventTarget specific configuration to mix into the published event.
+* @param {Object} ceOpts The publish specific configuration to mix into the published event.
+* @return {CustomEvent} The published event. If called without `etOpts` or `ceOpts`, this will
+* be the default `CustomEvent` instance, and can be configured independently.
+*/
+_publish : function(fullType, etOpts, ceOpts) {
+var ce,
+etState = this._yuievt,
+etConfig = etState.config,
+host = etConfig.host,
+context = etConfig.context,
+events = etState.events;
+ce = events[fullType];
+// PERF: Hate to pull the check out of monitor, but trying to keep critical path tight.
+if ((etConfig.monitored && !ce) || (ce && ce.monitored)) {
+this._monitor('publish', fullType, {
+args: arguments
+});
+}
+if (!ce) {
+// Publish event
+ce = events[fullType] = new Y.CustomEvent(fullType, etOpts);
+if (!etOpts) {
+ce.host = host;
+ce.context = context;
+}
+}
+if (ceOpts) {
+mixConfigs(ce, ceOpts, true);
+}
+return ce;
+},
+/**
+* This is the entry point for the event monitoring system.
+* You can monitor 'attach', 'detach', 'fire', and 'publish'.
+* When configured, these events generate an event.  click ->
+* click_attach, click_detach, click_publish -- these can
+* be subscribed to like other events to monitor the event
+* system.  Inividual published events can have monitoring
+* turned on or off (publish can't be turned off before it
+* it published) by setting the events 'monitor' config.
+*
+* @method _monitor
+* @param what {String} 'attach', 'detach', 'fire', or 'publish'
+* @param eventType {String|CustomEvent} The prefixed name of the event being monitored, or the CustomEvent object.
+* @param o {Object} Information about the event interaction, such as
+*                  fire() args, subscription category, publish config
+* @private
+*/
+_monitor: function(what, eventType, o) {
+var monitorevt, ce, type;
+if (eventType) {
+if (typeof eventType === "string") {
+type = eventType;
+ce = this.getEvent(eventType, true);
+} else {
+ce = eventType;
+type = eventType.type;
+}
+if ((this._yuievt.config.monitored && (!ce || ce.monitored)) || (ce && ce.monitored)) {
+monitorevt = type + '_' + what;
+o.monitored = what;
+this.fire.call(this, monitorevt, 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.
+*
+* The first argument is the event type, and any additional arguments are
+* passed to the listeners as parameters.  If the first of these is an
+* object literal, and the event is configured to emit an event facade,
+* that object is mixed into the event facade and the facade is provided
+* in place of the original object.
+*
+* 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.  If the first of these is an object literal and the event is
+* configured to emit an event facade, the event facade will replace that
+* parameter after the properties the object literal contains are copied to
+* the event facade.
+* @return {Boolean} True if the whole lifecycle of the event went through,
+* false if at any point the event propagation was halted.
+*/
+fire: function(type) {
+var typeIncluded = (typeof type === "string"),
+argCount = arguments.length,
+t = type,
+yuievt = this._yuievt,
+etConfig = yuievt.config,
+pre = etConfig.prefix,
+ret,
+ce,
+ce2,
+args;
+if (typeIncluded && argCount <= 3) {
+// PERF: Try to avoid slice/iteration for the common signatures
+// Most common
+if (argCount === 2) {
+args = [arguments[1]]; // fire("foo", {})
+} else if (argCount === 3) {
+args = [arguments[1], arguments[2]]; // fire("foo", {}, opts)
+} else {
+args = []; // fire("foo")
+}
+} else {
+args = nativeSlice.call(arguments, ((typeIncluded) ? 1 : 0));
+}
+if (!typeIncluded) {
+t = (type && type.type);
+}
+if (pre) {
+t = _getType(t, pre);
+}
+ce = yuievt.events[t];
+if (this._hasSiblings) {
+ce2 = this.getSibling(t, ce);
+if (ce2 && !ce) {
+ce = this.publish(t);
+}
+}
+// PERF: trying to avoid function call, since this is a critical path
+if ((etConfig.monitored && (!ce || ce.monitored)) || (ce && ce.monitored)) {
+this._monitor('fire', (ce || t), {
+args: args
+});
+}
+// this event has not been published or subscribed to
+if (!ce) {
+if (yuievt.hasTargets) {
+return this.bubble({ type: t }, args, this);
+}
+// otherwise there is nothing to be done
+ret = true;
+} else {
+if (ce2) {
+ce.sibling = ce2;
+}
+ret = ce._fire(args);
+}
+return (yuievt.chain) ? this : ret;
+},
+getSibling: function(type, ce) {
+var ce2;
+// delegate to *:type events if there are subscribers
+if (type.indexOf(PREFIX_DELIMITER) > -1) {
+type = _wildType(type);
+ce2 = this.getEvent(type, true);
+if (ce2) {
+ce2.applyConfig(ce);
+ce2.bubbles = false;
+ce2.broadcast = 0;
+}
+}
+return ce2;
+},
+/**
+* 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
+* @param prefixed {String} if true, the type is prefixed already
+* @return {CustomEvent} the custom event or null
+*/
+getEvent: function(type, prefixed) {
+var pre, e;
+if (!prefixed) {
+pre = this._yuievt.config.prefix;
+type = (pre) ? _getType(type, pre) : type;
+}
+e = this._yuievt.events;
+return e[type] || null;
+},
+/**
+* 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 {String} type The name of the event
+* @param {Function} fn The callback to execute in response to the event
+* @param {Object} [context] Override `this` object in callback
+* @param {Any} [arg*] 0..n additional arguments to supply to the subscriber
+* @return {EventHandle} A subscription handle capable of detaching the
+*                       subscription
+*/
+after: function(type, fn) {
+var a = nativeSlice.call(arguments, 0);
+switch (L.type(type)) {
+case 'function':
+return Y.Do.after.apply(Y.Do, arguments);
+case 'array':
+//     YArray.each(a[0], function(v) {
+//         v = AFTER_PREFIX + v;
+//     });
+//     break;
+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, 0-n arguments
+*
+* For methods:
+* callback, object (method host), methodName, context, 0-n arguments
+*
+* @method before
+* @return detach handle
+*/
+before: function() {
+return this.on.apply(this, arguments);
+}
+};
+Y.EventTarget = ET;
+// make Y an event target
+Y.mix(Y, ET.prototype);
+ET.call(Y, { bubbles: false });
+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?
+/**
+`Y.on()` can do many things:
+<ul>
+<li>Subscribe to custom events `publish`ed and `fire`d from Y</li>
+<li>Subscribe to custom events `publish`ed with `broadcast` 1 or 2 and
+`fire`d from any object in the YUI instance sandbox</li>
+<li>Subscribe to DOM events</li>
+<li>Subscribe to the execution of a method on any object, effectively
+treating that method as an event</li>
+</ul>
+For custom event subscriptions, pass the custom event name as the first argument
+and callback as the second. The `this` object in the callback will be `Y` unless
+an override is passed as the third argument.
+Y.on('io:complete', function () {
+Y.MyApp.updateStatus('Transaction complete');
+});
+To subscribe to DOM events, pass the name of a DOM event as the first argument
+and a CSS selector string as the third argument after the callback function.
+Alternately, the third argument can be a `Node`, `NodeList`, `HTMLElement`,
+array, or simply omitted (the default is the `window` object).
+Y.on('click', function (e) {
+e.preventDefault();
+// proceed with ajax form submission
+var url = this.get('action');
+...
+}, '#my-form');
+The `this` object in DOM event callbacks will be the `Node` targeted by the CSS
+selector or other identifier.
+`on()` subscribers for DOM events or custom events `publish`ed with a
+`defaultFn` can prevent the default behavior with `e.preventDefault()` from the
+event object passed as the first parameter to the subscription callback.
+To subscribe to the execution of an object method, pass arguments corresponding to the call signature for
+<a href="../classes/Do.html#methods_before">`Y.Do.before(...)`</a>.
+NOTE: The formal parameter list below is for events, not for function
+injection.  See `Y.Do.before` for that signature.
+@method on
+@param {String} type DOM or custom event name
+@param {Function} fn The callback to execute in response to the event
+@param {Object} [context] Override `this` object in callback
+@param {Any} [arg*] 0..n additional arguments to supply to the subscriber
+@return {EventHandle} A subscription handle capable of detaching the
+subscription
+@see Do.before
+@for YUI
+**/
+/**
+Listen for an event one time.  Equivalent to `on()`, except that
+the listener is immediately detached when executed.
+See the <a href="#methods_on">`on()` method</a> for additional subscription
+options.
+@see on
+@method once
+@param {String} type DOM or custom event name
+@param {Function} fn The callback to execute in response to the event
+@param {Object} [context] Override `this` object in callback
+@param {Any} [arg*] 0..n additional arguments to supply to the subscriber
+@return {EventHandle} A subscription handle capable of detaching the
+subscription
+@for YUI
+**/
+/**
+Listen for an event one time.  Equivalent to `once()`, except, like `after()`,
+the subscription callback executes after all `on()` subscribers and the event's
+`defaultFn` (if configured) have executed.  Like `after()` if any `on()` phase
+subscriber calls `e.preventDefault()`, neither the `defaultFn` nor the `after()`
+subscribers will execute.
+The listener is immediately detached when executed.
+See the <a href="#methods_on">`on()` method</a> for additional subscription
+options.
+@see once
+@method onceAfter
+@param {String} type The custom event name
+@param {Function} fn The callback to execute in response to the event
+@param {Object} [context] Override `this` object in callback
+@param {Any} [arg*] 0..n additional arguments to supply to the subscriber
+@return {EventHandle} A subscription handle capable of detaching the
+subscription
+@for YUI
+**/
+/**
+Like `on()`, this method creates a subscription to a custom event or to the
+execution of a method on an object.
+For events, `after()` subscribers are executed after the event's
+`defaultFn` unless `e.preventDefault()` was called from an `on()` subscriber.
+See the <a href="#methods_on">`on()` method</a> for additional subscription
+options.
+NOTE: The subscription signature shown is for events, not for function
+injection.  See <a href="../classes/Do.html#methods_after">`Y.Do.after`</a>
+for that signature.
+@see on
+@see Do.after
+@method after
+@param {String} type The custom event name
+@param {Function} fn The callback to execute in response to the event
+@param {Object} [context] Override `this` object in callback
+@param {Any} [args*] 0..n additional arguments to supply to the subscriber
+@return {EventHandle} A subscription handle capable of detaching the
+subscription
+@for YUI
+**/
+}, '@VERSION@', {"requires": ["oop"]});

comt