AsyncQueue

`_defAddFn`

(

e

)

protected

Defined in yui3/src/async-queue/js/async-queue.js:334

Default functionality for the "add" event. Adds the callbacks in the event facade to the queue. Callbacks successfully added to the queue are present in the event's <code>added</code> property in the after phase.

Parameters:

e Event

the event object

`_defExecFn`

(

e

)

protected

Defined in yui3/src/async-queue/js/async-queue.js:307

Default functionality for the "execute" event. Executes the callback function

Parameters:

e Event

the event object

`_defPromoteFn`

(

e

)

protected

Defined in yui3/src/async-queue/js/async-queue.js:468

Default functionality for the "promote" event. Promotes the named callback to the head of the queue.

The event object will contain a property "callback", which holds the id of a callback or the callback object itself.

Parameters:

e Event

the custom event

`_defRemoveFn`

(

e

)

protected

Defined in yui3/src/async-queue/js/async-queue.js:516

Default functionality for the "remove" event. Removes the callback from the queue.

The event object will contain a property "callback", which holds the id of a callback or the callback object itself.

Parameters:

e Event

the custom event

`_defShiftFn`

(

e

)

protected

Defined in yui3/src/async-queue/js/async-queue.js:155

Default functionality for the "shift" event. Shifts the callback stored in the event object's callback property from the queue if it is the first item.

Parameters:

e Event

The event object

`_execute`

(

callback

)

Boolean protected

Defined in yui3/src/async-queue/js/async-queue.js:253

Handles the execution of callbacks. Returns a boolean indicating whether it is appropriate to continue running.

Parameters:

callback Object

the callback object to execute

Returns:

Boolean:

whether the run loop should continue

`_getFullType`

(

type

)

String private

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:564

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.

Parameters:

type String

The short type to prefix

Returns:

String:

The prefixed type, if a prefix is set, otherwise the type passed in

`_getType`

() private

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:36

If the instance has a prefix attribute and the event type is not prefixed, the instance prefix is applied to the supplied type.

`_hasPotentialSubscribers`

(

fullType

)

Boolean private

Inherited from EventTarget: yui3/src/event-custom/js/event-facade.js:643

Parameters:

fullType String

The fully prefixed type name

Returns:

Boolean:

Whether the event has potential subscribers or not

`_init`

() protected

Defined in yui3/src/async-queue/js/async-queue.js:90

Initializes the AsyncQueue instance properties and events.

`_initEvents`

() protected

Defined in yui3/src/async-queue/js/async-queue.js:113

Initializes the instance events.

`_monitor`

(

what
eventType
o

)

private

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:636

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.

Parameters:

what String

'attach', 'detach', 'fire', or 'publish'
eventType String | CustomEvent

The prefixed name of the event being monitored, or the CustomEvent object.
o Object

Information about the event interaction, such as fire() args, subscription category, publish config

`_parseType`

() private

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:52

Returns an array with the detach key (if provided), and the prefixed event name from _getType Y.on('detachcategory| menu:click', fn)

`_prepare`

(

callback

)

Function protected

Defined in yui3/src/async-queue/js/async-queue.js:170

Creates a wrapper function to execute the callback using the aggregated configuration generated by combining the static AsyncQueue.defaults, the instance defaults, and the specified callback settings.

The wrapper function is decorated with the callback configuration as properties for runtime modification.

Parameters:

callback Object | Function

the raw callback

Returns:

Function:

a decorated function wrapper to execute the callback

`_publish`

(

fullType
etOpts
ceOpts

)

CustomEvent private

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:588

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.

Parameters:

fullType String

The prefixed type of the event to publish.
etOpts Object

The EventTarget specific configuration to mix into the published event.
ceOpts Object

The publish specific configuration to mix into the published event.

Returns:

CustomEvent:

The published event. If called without <code>etOpts</code> or <code>ceOpts</code>, this will be the default <code>CustomEvent</code> instance, and can be configured independently.

`_schedule`

(

callback

)

Boolean protected

Defined in yui3/src/async-queue/js/async-queue.js:278

Schedules the execution of asynchronous callbacks.

Parameters:

callback Object

the callback object to execute

Returns:

Boolean:

whether the run loop should continue

`add`

(

callback

)

AsyncQueue chainable

Defined in yui3/src/async-queue/js/async-queue.js:319

Add any number of callbacks to the end of the queue. Callbacks may be provided as functions or objects.

Parameters:

callback Function | Object multiple

0..n callbacks

Returns:

AsyncQueue:

the AsyncQueue instance

`addTarget`

(

o

)

chainable

Inherited from EventTarget: yui3/src/event-custom/js/event-facade.js:496

Registers another EventTarget as a bubble target. Bubble order is determined by the order registered. Multiple targets can be specified.

Events can only bubble if emitFacade is true.

Included in the event-custom-complex submodule.

Parameters:

o EventTarget

the target to add

`after`

(

type
fn
[context]
[arg*]

)

EventHandle

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:812

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.

Parameters:

type String

The name of the event
fn Function

The callback to execute in response to the event
[context] Object optional

Override <code>this</code> object in callback
[arg*] Any optional

0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching the subscription

`before`

()

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:849

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

Returns:

detach handle

`bubble`

(

evt

)

Boolean

Inherited from EventTarget: yui3/src/event-custom/js/event-facade.js:554

Propagate an event. Requires the event-custom-complex module.

Parameters:

evt CustomEvent

the custom event to propagate

Returns:

Boolean:

the aggregated return value from Event.Custom.fire

`detach`

(

type
fn
context

)

EventTarget

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:356

Detach one or more listeners the from the specified event

Parameters:

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.
fn Function

The subscribed function to unsubscribe, if not supplied, all subscribers will be removed.
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)

Returns:

EventTarget:

the host

`detachAll`

(

type

)

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:479

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

type String

The type, or name of the event

`fire`

(

type
arguments

)

Boolean

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:673

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.

Parameters:

type String | Object

The type of the event, or an object that contains a 'type' property.
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.

Returns:

Boolean:

True if the whole lifecycle of the event went through, false if at any point the event propagation was halted.

`getCallback`

(

id

)

Object

Defined in yui3/src/async-queue/js/async-queue.js:429

Retrieve a callback by its id. Useful to modify the configuration while the queue is running.

Parameters:

id String

the id assigned to the callback

Returns:

Object:

the callback object

`getEvent`

(

type
prefixed

)

CustomEvent

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:793

Returns the custom event of the provided type has been created, a falsy value otherwise

Parameters:

type String

the type, or name of the event
prefixed String

if true, the type is prefixed already

Returns:

CustomEvent:

the custom event or null

`getTargets`

()

Inherited from EventTarget: yui3/src/event-custom/js/event-facade.js:523

Returns an array of bubble targets for this object.

Returns:

EventTarget[]

`indexOf`

(

callback

)

Number

Defined in yui3/src/async-queue/js/async-queue.js:408

Returns the current index of a callback. Pass in either the id or callback function from getCallback.

Parameters:

callback String | Function

the callback or its specified id

Returns:

Number:

index of the callback or -1 if not found

`isRunning`

() Boolean

Defined in yui3/src/async-queue/js/async-queue.js:296

Determines if the queue is waiting for a callback to complete execution.

Returns:

Boolean:

true if queue is waiting for a from any initiated transactions

`next`

() Function

Defined in yui3/src/async-queue/js/async-queue.js:129

Returns the next callback needing execution. If a callback is configured to repeat via iterations or until, it will be returned until the completion criteria is met.

When the queue is empty, null is returned.

Returns:

Function:

the callback to execute

`on`

(

type
fn
[context]
[arg*]

)

EventHandle

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:188

Subscribe a callback function to a custom event fired by this object or from an object that bubbles its events to this object.

 this.on("change", this._onChange, this);

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.

 this.on({
                                                     "attrChange" : this._onAttrChange,
                                                     "change"     : this._onChange
                                                 });

You can also pass an array of event names as the first argument to subscribe to all listed events with the same callback.

 this.on([ "change", "attrChange" ], this._onChange);

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.

Parameters:

type String

The name of the event
fn Function

The callback to execute in response to the event
[context] Object optional

Override <code>this</code> object in callback
[arg*] Any optional

0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching that subscription

`once`

(

type
fn
[context]
[arg*]

)

EventHandle

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:124

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.

Parameters:

type String

The name of the event
fn Function

The callback to execute in response to the event
[context] Object optional

Override <code>this</code> object in callback
[arg*] Any optional

0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching the subscription

`onceAfter`

(

type
fn
[context]
[arg*]

)

EventHandle

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:146

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.

Parameters:

type String

The name of the event
fn Function

The callback to execute in response to the event
[context] Object optional

Override <code>this</code> object in callback
[arg*] Any optional

0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching that subscription

`parseType`

(

type
[pre]

)

Array

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:168

Available since 3.3.0

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.

Parameters:

type String

the type
[pre] String optional

The prefix. Defaults to this._yuievt.config.prefix

Returns:

Array:

an array containing: <ul> <li>the detach category, if supplied,</li> <li>the prefixed event type,</li> <li>whether or not this is an after listener,</li> <li>the supplied event type</li> </ul>

`pause`

() AsyncQueue chainable

Defined in yui3/src/async-queue/js/async-queue.js:358

Pause the execution of the queue after the execution of the current callback completes. If called from code outside of a queued callback, clears the timeout for the pending callback. Paused queue can be restarted with q.run()

Returns:

AsyncQueue:

the AsyncQueue instance

`promote`

(

callback

)

AsyncQueue chainable

Defined in yui3/src/async-queue/js/async-queue.js:443

Promotes the named callback to the top of the queue. If a callback is currently executing or looping (via until or iterations), the promotion is scheduled to occur after the current callback has completed.

Parameters:

callback String | Object

the callback object or a callback's id

Returns:

AsyncQueue:

the AsyncQueue instance

`publish`

(

type
opts

)

CustomEvent

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:503

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.

Parameters:

type String

the type, or name of the event
opts Object

optional config params. Valid properties are:
- [broadcast=false] Boolean optional
 
 whether or not the YUI instance and YUI global are notified when the event is fired.
- [bubbles=true] Boolean optional
 
 Whether or not this event bubbles. Events can only bubble if <code>emitFacade</code> is true.
- [context=this] Object optional
 
 the default execution context for the listeners.
- [defaultFn] Function optional
 
 the default function to execute when this event fires if preventDefault was not called.
- [emitFacade=false] Boolean optional
 
 whether or not this event emits a facade.
- [prefix] String optional
 
 the prefix for this targets events, e.g., 'menu' in 'menu:click'.
- [fireOnce=false] Boolean optional
 
 if an event is configured to fire once, new subscribers after the fire will be notified immediately.
- [async=false] Boolean optional
 
 fireOnce event listeners will fire synchronously if the event has already fired unless <code>async</code> is <code>true</code>.
- [preventable=true] Boolean optional
 
 whether or not <code>preventDefault()</code> has an effect.
- [preventedFn] Function optional
 
 a function that is executed when <code>preventDefault()</code> is called.
- [queuable=false] Boolean optional
 
 whether or not this event can be queued during bubbling.
- [silent] Boolean optional
 
 if silent is true, debug messages are not provided for this event.
- [stoppedFn] Function optional
 
 a function that is executed when stopPropagation is called.
- [monitored] Boolean optional
 
 specifies whether or not this event should send notifications about when the event has been attached, detached, or published.
- [type] String optional
 
 the event type (valid option if not provided as the first parameter to publish).

Returns:

CustomEvent:

the custom event

`remove`

(

callback

)

AsyncQueue chainable

Defined in yui3/src/async-queue/js/async-queue.js:490

Removes the callback from the queue. If the queue is active, the removal is scheduled to occur after the current callback has completed.

Parameters:

callback String | Object

the callback object or a callback's id

Returns:

AsyncQueue:

the AsyncQueue instance

`removeTarget`

(

o

)

chainable

Inherited from EventTarget: yui3/src/event-custom/js/event-facade.js:533

Removes a bubble target

Parameters:

o EventTarget

the target to remove

`run`

() AsyncQueue chainable

Defined in yui3/src/async-queue/js/async-queue.js:207

Sets the queue in motion. All queued callbacks will be executed in order unless pause() or stop() is called or if one of the callbacks is configured with autoContinue: false.

Returns:

AsyncQueue:

the AsyncQueue instance

`size`

() Number

Defined in yui3/src/async-queue/js/async-queue.js:533

Returns the number of callbacks in the queue.

Returns:

Number:

`stop`

() AsyncQueue chainable

Defined in yui3/src/async-queue/js/async-queue.js:378

Stop and clear the queue after the current execution of the current callback completes.

Returns:

AsyncQueue:

the AsyncQueue instance

`subscribe`

() deprecated

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:346

Deprecated: use on

subscribe to an event

`unsubscribe`

() deprecated

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:469

Deprecated: use detach

detach a listener

`unsubscribeAll`

(

type

)

deprecated

Inherited from EventTarget: yui3/src/event-custom/js/event-target.js:490

Deprecated: use detachAll

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

type String

The type, or name of the event

APIs

AsyncQueue Class

Constructor

Parameters:

Index

Methods

Properties

Events

Methods

_defAddFn

Parameters:

_defExecFn

Parameters:

_defPromoteFn

Parameters:

_defRemoveFn

Parameters:

_defShiftFn

Parameters:

_execute

Parameters:

Returns:

_getFullType

Parameters:

Returns:

_getType

_hasPotentialSubscribers

Parameters:

Returns:

_init

_initEvents

_monitor

Parameters:

_parseType

_prepare

Parameters:

Returns:

_publish

Parameters:

Returns:

_schedule

Parameters:

Returns:

add

Parameters:

Returns:

addTarget

Parameters:

after

Parameters:

Returns:

before

Returns:

bubble

Parameters:

Returns:

detach

Parameters:

Returns:

detachAll

Parameters:

fire

Parameters:

Returns:

getCallback

Parameters:

Returns:

getEvent

Parameters:

Returns:

getTargets

Returns:

indexOf

Parameters:

Returns:

isRunning

Returns:

next

Returns:

`AsyncQueue`

`_defAddFn`

`_defExecFn`

`_defPromoteFn`

`_defRemoveFn`

`_defShiftFn`

`_execute`

`_getFullType`

`_getType`

`_hasPotentialSubscribers`

`_init`

`_initEvents`

`_monitor`

`_parseType`

`_prepare`

`_publish`

`_schedule`

`add`

`addTarget`

`after`

`before`

`bubble`

`detach`

`detachAll`

`fire`

`getCallback`

`getEvent`

`getTargets`

`indexOf`

`isRunning`

`next`

`on`

`once`

`onceAfter`

`parseType`

`pause`

`promote`

`publish`

`remove`

`removeTarget`

`run`

`size`

`stop`

`subscribe`

`unsubscribe`

`unsubscribeAll`

`_running`

`defaults`

`defaults`

`complete`