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1739 lines
60 KiB
JavaScript
1739 lines
60 KiB
JavaScript
/*
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Copyright (c) 2006, Yahoo! Inc. All rights reserved.
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Code licensed under the BSD License:
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http://developer.yahoo.net/yui/license.txt
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version: 0.12.0
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*/
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/**
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* The CustomEvent class lets you define events for your application
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* that can be subscribed to by one or more independent component.
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*
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* @param {String} type The type of event, which is passed to the callback
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* when the event fires
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* @param {Object} oScope The context the event will fire from. "this" will
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* refer to this object in the callback. Default value:
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* the window object. The listener can override this.
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* @param {boolean} silent pass true to prevent the event from writing to
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* the log system
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* @namespace YAHOO.util
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* @class CustomEvent
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* @constructor
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*/
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YAHOO.util.CustomEvent = function(type, oScope, silent, signature) {
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/**
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* The type of event, returned to subscribers when the event fires
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* @property type
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* @type string
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*/
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this.type = type;
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/**
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* The scope the the event will fire from by default. Defaults to the window
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* obj
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* @property scope
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* @type object
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*/
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this.scope = oScope || window;
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/**
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* By default all custom events are logged in the debug build, set silent
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* to true to disable logging for this event.
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* @property silent
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* @type boolean
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*/
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this.silent = silent;
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/**
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* Custom events support two styles of arguments provided to the event
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* subscribers.
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* <ul>
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* <li>YAHOO.util.CustomEvent.LIST:
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* <ul>
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* <li>param1: event name</li>
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* <li>param2: array of arguments sent to fire</li>
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* <li>param3: <optional> a custom object supplied by the subscriber</li>
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* </ul>
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* </li>
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* <li>YAHOO.util.CustomEvent.FLAT
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* <ul>
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* <li>param1: the first argument passed to fire. If you need to
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* pass multiple parameters, use and array or object literal</li>
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* <li>param2: <optional> a custom object supplied by the subscriber</li>
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* </ul>
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* </li>
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* </ul>
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* @property signature
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* @type int
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*/
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this.signature = signature || YAHOO.util.CustomEvent.LIST;
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/**
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* The subscribers to this event
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* @property subscribers
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* @type Subscriber[]
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*/
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this.subscribers = [];
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if (!this.silent) {
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}
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var onsubscribeType = "_YUICEOnSubscribe";
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// Only add subscribe events for events that are not generated by
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// CustomEvent
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if (type !== onsubscribeType) {
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/**
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* Custom events provide a custom event that fires whenever there is
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* a new subscriber to the event. This provides an opportunity to
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* handle the case where there is a non-repeating event that has
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* already fired has a new subscriber.
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*
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* @event subscribeEvent
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* @type YAHOO.util.CustomEvent
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* @param {Function} fn The function to execute
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* @param {Object} obj An object to be passed along when the event
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* fires
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* @param {boolean|Object} override If true, the obj passed in becomes
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* the execution scope of the listener.
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* if an object, that object becomes the
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* the execution scope.
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*/
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this.subscribeEvent =
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new YAHOO.util.CustomEvent(onsubscribeType, this, true);
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}
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};
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/**
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* Subscriber listener sigature constant. The LIST type returns three
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* parameters: the event type, the array of args passed to fire, and
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* the optional custom object
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* @property YAHOO.util.CustomEvent.LIST
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* @static
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* @type int
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*/
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YAHOO.util.CustomEvent.LIST = 0;
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/**
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* Subscriber listener sigature constant. The FLAT type returns two
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* parameters: the first argument passed to fire and the optional
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* custom object
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* @property YAHOO.util.CustomEvent.FLAT
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* @static
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* @type int
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*/
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YAHOO.util.CustomEvent.FLAT = 1;
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YAHOO.util.CustomEvent.prototype = {
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/**
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* Subscribes the caller to this event
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* @method subscribe
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* @param {Function} fn The function to execute
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* @param {Object} obj An object to be passed along when the event
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* fires
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* @param {boolean|Object} override If true, the obj passed in becomes
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* the execution scope of the listener.
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* if an object, that object becomes the
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* the execution scope.
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*/
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subscribe: function(fn, obj, override) {
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if (this.subscribeEvent) {
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this.subscribeEvent.fire(fn, obj, override);
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}
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this.subscribers.push( new YAHOO.util.Subscriber(fn, obj, override) );
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},
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/**
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* Unsubscribes the caller from this event
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* @method unsubscribe
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* @param {Function} fn The function to execute
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* @param {Object} obj The custom object passed to subscribe (optional)
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* @return {boolean} True if the subscriber was found and detached.
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*/
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unsubscribe: function(fn, obj) {
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var found = false;
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for (var i=0, len=this.subscribers.length; i<len; ++i) {
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var s = this.subscribers[i];
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if (s && s.contains(fn, obj)) {
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this._delete(i);
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found = true;
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}
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}
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return found;
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},
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/**
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* Notifies the subscribers. The callback functions will be executed
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* from the scope specified when the event was created, and with the
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* following parameters:
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* <ul>
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* <li>The type of event</li>
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* <li>All of the arguments fire() was executed with as an array</li>
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* <li>The custom object (if any) that was passed into the subscribe()
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* method</li>
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* </ul>
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* @method fire
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* @param {Object*} arguments an arbitrary set of parameters to pass to
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* the handler.
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*/
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fire: function() {
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var len=this.subscribers.length;
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if (!len && this.silent) {
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return true;
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}
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var args=[], ret=true, i;
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for (i=0; i<arguments.length; ++i) {
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args.push(arguments[i]);
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}
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var argslength = args.length;
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if (!this.silent) {
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}
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for (i=0; i<len; ++i) {
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var s = this.subscribers[i];
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if (s) {
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if (!this.silent) {
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}
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var scope = s.getScope(this.scope);
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if (this.signature == YAHOO.util.CustomEvent.FLAT) {
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var param = null;
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if (args.length > 0) {
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param = args[0];
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}
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ret = s.fn.call(scope, param, s.obj);
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} else {
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ret = s.fn.call(scope, this.type, args, s.obj);
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}
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if (false === ret) {
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if (!this.silent) {
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}
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//break;
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return false;
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}
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}
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}
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return true;
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},
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/**
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* Removes all listeners
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* @method unsubscribeAll
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*/
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unsubscribeAll: function() {
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for (var i=0, len=this.subscribers.length; i<len; ++i) {
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this._delete(len - 1 - i);
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}
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},
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/**
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* @method _delete
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* @private
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*/
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_delete: function(index) {
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var s = this.subscribers[index];
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if (s) {
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delete s.fn;
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delete s.obj;
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}
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// delete this.subscribers[index];
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this.subscribers.splice(index, 1);
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},
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/**
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* @method toString
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*/
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toString: function() {
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return "CustomEvent: " + "'" + this.type + "', " +
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"scope: " + this.scope;
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}
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};
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/////////////////////////////////////////////////////////////////////
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/**
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* Stores the subscriber information to be used when the event fires.
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* @param {Function} fn The function to execute
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* @param {Object} obj An object to be passed along when the event fires
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* @param {boolean} override If true, the obj passed in becomes the execution
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* scope of the listener
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* @class Subscriber
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* @constructor
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*/
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YAHOO.util.Subscriber = function(fn, obj, override) {
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/**
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* The callback that will be execute when the event fires
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* @property fn
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* @type function
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*/
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this.fn = fn;
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/**
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* An optional custom object that will passed to the callback when
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* the event fires
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* @property obj
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* @type object
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*/
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this.obj = obj || null;
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/**
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* The default execution scope for the event listener is defined when the
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* event is created (usually the object which contains the event).
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* By setting override to true, the execution scope becomes the custom
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* object passed in by the subscriber. If override is an object, that
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* object becomes the scope.
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* @property override
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* @type boolean|object
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*/
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this.override = override;
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};
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/**
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* Returns the execution scope for this listener. If override was set to true
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* the custom obj will be the scope. If override is an object, that is the
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* scope, otherwise the default scope will be used.
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* @method getScope
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* @param {Object} defaultScope the scope to use if this listener does not
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* override it.
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*/
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YAHOO.util.Subscriber.prototype.getScope = function(defaultScope) {
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if (this.override) {
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if (this.override === true) {
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return this.obj;
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} else {
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return this.override;
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}
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}
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return defaultScope;
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};
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/**
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* Returns true if the fn and obj match this objects properties.
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* Used by the unsubscribe method to match the right subscriber.
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*
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* @method contains
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* @param {Function} fn the function to execute
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* @param {Object} obj an object to be passed along when the event fires
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* @return {boolean} true if the supplied arguments match this
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* subscriber's signature.
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*/
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YAHOO.util.Subscriber.prototype.contains = function(fn, obj) {
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if (obj) {
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return (this.fn == fn && this.obj == obj);
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} else {
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return (this.fn == fn);
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}
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};
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/**
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* @method toString
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*/
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YAHOO.util.Subscriber.prototype.toString = function() {
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return "Subscriber { obj: " + (this.obj || "") +
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", override: " + (this.override || "no") + " }";
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};
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/**
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* The Event Utility provides utilities for managing DOM Events and tools
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* for building event systems
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*
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* @module event
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* @title Event Utility
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* @namespace YAHOO.util
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* @requires yahoo
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*/
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// The first instance of Event will win if it is loaded more than once.
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if (!YAHOO.util.Event) {
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/**
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* The event utility provides functions to add and remove event listeners,
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* event cleansing. It also tries to automatically remove listeners it
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* registers during the unload event.
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*
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* @class Event
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* @static
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*/
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YAHOO.util.Event = function() {
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/**
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* True after the onload event has fired
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* @property loadComplete
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* @type boolean
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* @static
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* @private
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*/
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var loadComplete = false;
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/**
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* Cache of wrapped listeners
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* @property listeners
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* @type array
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* @static
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* @private
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*/
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var listeners = [];
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/**
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* User-defined unload function that will be fired before all events
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* are detached
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* @property unloadListeners
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* @type array
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* @static
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* @private
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*/
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var unloadListeners = [];
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/**
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* Cache of DOM0 event handlers to work around issues with DOM2 events
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* in Safari
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* @property legacyEvents
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* @static
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* @private
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*/
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var legacyEvents = [];
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/**
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* Listener stack for DOM0 events
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* @property legacyHandlers
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* @static
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* @private
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*/
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var legacyHandlers = [];
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/**
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* The number of times to poll after window.onload. This number is
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* increased if additional late-bound handlers are requested after
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* the page load.
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* @property retryCount
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* @static
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* @private
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*/
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var retryCount = 0;
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/**
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* onAvailable listeners
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* @property onAvailStack
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* @static
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* @private
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*/
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var onAvailStack = [];
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/**
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* Lookup table for legacy events
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* @property legacyMap
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* @static
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* @private
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*/
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var legacyMap = [];
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/**
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* Counter for auto id generation
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* @property counter
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* @static
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* @private
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*/
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var counter = 0;
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return { // PREPROCESS
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/**
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* The number of times we should look for elements that are not
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* in the DOM at the time the event is requested after the document
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* has been loaded. The default is 200@amp;50 ms, so it will poll
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* for 10 seconds or until all outstanding handlers are bound
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* (whichever comes first).
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* @property POLL_RETRYS
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* @type int
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* @static
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* @final
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*/
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POLL_RETRYS: 200,
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/**
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* The poll interval in milliseconds
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* @property POLL_INTERVAL
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* @type int
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* @static
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* @final
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*/
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POLL_INTERVAL: 20,
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/**
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* Element to bind, int constant
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* @property EL
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* @type int
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* @static
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* @final
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*/
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EL: 0,
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/**
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* Type of event, int constant
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* @property TYPE
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* @type int
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* @static
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* @final
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*/
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TYPE: 1,
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/**
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* Function to execute, int constant
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* @property FN
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* @type int
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* @static
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* @final
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*/
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FN: 2,
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/**
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* Function wrapped for scope correction and cleanup, int constant
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* @property WFN
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* @type int
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* @static
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* @final
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*/
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WFN: 3,
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/**
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* Object passed in by the user that will be returned as a
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* parameter to the callback, int constant
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* @property OBJ
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* @type int
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* @static
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* @final
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*/
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OBJ: 3,
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/**
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* Adjusted scope, either the element we are registering the event
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* on or the custom object passed in by the listener, int constant
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* @property ADJ_SCOPE
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* @type int
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* @static
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* @final
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*/
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ADJ_SCOPE: 4,
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/**
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* Safari detection is necessary to work around the preventDefault
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* bug that makes it so you can't cancel a href click from the
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* handler. There is not a capabilities check we can use here.
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* @property isSafari
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* @private
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* @static
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*/
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isSafari: (/Safari|Konqueror|KHTML/gi).test(navigator.userAgent),
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/**
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* IE detection needed to properly calculate pageX and pageY.
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* capabilities checking didn't seem to work because another
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* browser that does not provide the properties have the values
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* calculated in a different manner than IE.
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* @property isIE
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* @private
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* @static
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*/
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isIE: (!this.isSafari && !navigator.userAgent.match(/opera/gi) &&
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navigator.userAgent.match(/msie/gi)),
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/**
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* poll handle
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* @property _interval
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* @private
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*/
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_interval: null,
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|
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/**
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* @method startInterval
|
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* @static
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* @private
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*/
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startInterval: function() {
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if (!this._interval) {
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var self = this;
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var callback = function() { self._tryPreloadAttach(); };
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this._interval = setInterval(callback, this.POLL_INTERVAL);
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// this.timeout = setTimeout(callback, i);
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}
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},
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/**
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* Executes the supplied callback when the item with the supplied
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* id is found. This is meant to be used to execute behavior as
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* soon as possible as the page loads. If you use this after the
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* initial page load it will poll for a fixed time for the element.
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* The number of times it will poll and the frequency are
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* configurable. By default it will poll for 10 seconds.
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*
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* @method onAvailable
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*
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* @param {string} p_id the id of the element to look for.
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* @param {function} p_fn what to execute when the element is found.
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* @param {object} p_obj an optional object to be passed back as
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* a parameter to p_fn.
|
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* @param {boolean} p_override If set to true, p_fn will execute
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* in the scope of p_obj
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*
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* @static
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*/
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onAvailable: function(p_id, p_fn, p_obj, p_override) {
|
|
onAvailStack.push( { id: p_id,
|
|
fn: p_fn,
|
|
obj: p_obj,
|
|
override: p_override,
|
|
checkReady: false } );
|
|
|
|
retryCount = this.POLL_RETRYS;
|
|
this.startInterval();
|
|
},
|
|
|
|
/**
|
|
* Works the same way as onAvailable, but additionally checks the
|
|
* state of sibling elements to determine if the content of the
|
|
* available element is safe to modify.
|
|
*
|
|
* @method onContentReady
|
|
*
|
|
* @param {string} p_id the id of the element to look for.
|
|
* @param {function} p_fn what to execute when the element is ready.
|
|
* @param {object} p_obj an optional object to be passed back as
|
|
* a parameter to p_fn.
|
|
* @param {boolean} p_override If set to true, p_fn will execute
|
|
* in the scope of p_obj
|
|
*
|
|
* @static
|
|
*/
|
|
onContentReady: function(p_id, p_fn, p_obj, p_override) {
|
|
onAvailStack.push( { id: p_id,
|
|
fn: p_fn,
|
|
obj: p_obj,
|
|
override: p_override,
|
|
checkReady: true } );
|
|
|
|
retryCount = this.POLL_RETRYS;
|
|
this.startInterval();
|
|
},
|
|
|
|
/**
|
|
* Appends an event handler
|
|
*
|
|
* @method addListener
|
|
*
|
|
* @param {Object} el The html element to assign the
|
|
* event to
|
|
* @param {String} sType The type of event to append
|
|
* @param {Function} fn The method the event invokes
|
|
* @param {Object} obj An arbitrary object that will be
|
|
* passed as a parameter to the handler
|
|
* @param {boolean} override If true, the obj passed in becomes
|
|
* the execution scope of the listener
|
|
* @return {boolean} True if the action was successful or defered,
|
|
* false if one or more of the elements
|
|
* could not have the event bound to it.
|
|
* @static
|
|
*/
|
|
addListener: function(el, sType, fn, obj, override) {
|
|
|
|
if (!fn || !fn.call) {
|
|
return false;
|
|
}
|
|
|
|
// The el argument can be an array of elements or element ids.
|
|
if ( this._isValidCollection(el)) {
|
|
var ok = true;
|
|
for (var i=0,len=el.length; i<len; ++i) {
|
|
ok = this.on(el[i],
|
|
sType,
|
|
fn,
|
|
obj,
|
|
override) && ok;
|
|
}
|
|
return ok;
|
|
|
|
} else if (typeof el == "string") {
|
|
var oEl = this.getEl(el);
|
|
// If the el argument is a string, we assume it is
|
|
// actually the id of the element. If the page is loaded
|
|
// we convert el to the actual element, otherwise we
|
|
// defer attaching the event until onload event fires
|
|
|
|
// check to see if we need to delay hooking up the event
|
|
// until after the page loads.
|
|
if (oEl) {
|
|
el = oEl;
|
|
} else {
|
|
// defer adding the event until the element is available
|
|
this.onAvailable(el, function() {
|
|
YAHOO.util.Event.on(el, sType, fn, obj, override);
|
|
});
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Element should be an html element or an array if we get
|
|
// here.
|
|
if (!el) {
|
|
return false;
|
|
}
|
|
|
|
// we need to make sure we fire registered unload events
|
|
// prior to automatically unhooking them. So we hang on to
|
|
// these instead of attaching them to the window and fire the
|
|
// handles explicitly during our one unload event.
|
|
if ("unload" == sType && obj !== this) {
|
|
unloadListeners[unloadListeners.length] =
|
|
[el, sType, fn, obj, override];
|
|
return true;
|
|
}
|
|
|
|
// if the user chooses to override the scope, we use the custom
|
|
// object passed in, otherwise the executing scope will be the
|
|
// HTML element that the event is registered on
|
|
var scope = el;
|
|
if (override) {
|
|
if (override === true) {
|
|
scope = obj;
|
|
} else {
|
|
scope = override;
|
|
}
|
|
}
|
|
|
|
// wrap the function so we can return the obj object when
|
|
// the event fires;
|
|
var wrappedFn = function(e) {
|
|
return fn.call(scope, YAHOO.util.Event.getEvent(e),
|
|
obj);
|
|
};
|
|
|
|
var li = [el, sType, fn, wrappedFn, scope];
|
|
var index = listeners.length;
|
|
// cache the listener so we can try to automatically unload
|
|
listeners[index] = li;
|
|
|
|
if (this.useLegacyEvent(el, sType)) {
|
|
var legacyIndex = this.getLegacyIndex(el, sType);
|
|
|
|
// Add a new dom0 wrapper if one is not detected for this
|
|
// element
|
|
if ( legacyIndex == -1 ||
|
|
el != legacyEvents[legacyIndex][0] ) {
|
|
|
|
legacyIndex = legacyEvents.length;
|
|
legacyMap[el.id + sType] = legacyIndex;
|
|
|
|
// cache the signature for the DOM0 event, and
|
|
// include the existing handler for the event, if any
|
|
legacyEvents[legacyIndex] =
|
|
[el, sType, el["on" + sType]];
|
|
legacyHandlers[legacyIndex] = [];
|
|
|
|
el["on" + sType] =
|
|
function(e) {
|
|
YAHOO.util.Event.fireLegacyEvent(
|
|
YAHOO.util.Event.getEvent(e), legacyIndex);
|
|
};
|
|
}
|
|
|
|
// add a reference to the wrapped listener to our custom
|
|
// stack of events
|
|
//legacyHandlers[legacyIndex].push(index);
|
|
legacyHandlers[legacyIndex].push(li);
|
|
|
|
} else {
|
|
this._simpleAdd(el, sType, wrappedFn, false);
|
|
}
|
|
|
|
return true;
|
|
|
|
},
|
|
|
|
/**
|
|
* When using legacy events, the handler is routed to this object
|
|
* so we can fire our custom listener stack.
|
|
* @method fireLegacyEvent
|
|
* @static
|
|
* @private
|
|
*/
|
|
fireLegacyEvent: function(e, legacyIndex) {
|
|
var ok = true;
|
|
|
|
var le = legacyHandlers[legacyIndex];
|
|
for (var i=0,len=le.length; i<len; ++i) {
|
|
var li = le[i];
|
|
if ( li && li[this.WFN] ) {
|
|
var scope = li[this.ADJ_SCOPE];
|
|
var ret = li[this.WFN].call(scope, e);
|
|
ok = (ok && ret);
|
|
}
|
|
}
|
|
|
|
return ok;
|
|
},
|
|
|
|
/**
|
|
* Returns the legacy event index that matches the supplied
|
|
* signature
|
|
* @method getLegacyIndex
|
|
* @static
|
|
* @private
|
|
*/
|
|
getLegacyIndex: function(el, sType) {
|
|
var key = this.generateId(el) + sType;
|
|
if (typeof legacyMap[key] == "undefined") {
|
|
return -1;
|
|
} else {
|
|
return legacyMap[key];
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Logic that determines when we should automatically use legacy
|
|
* events instead of DOM2 events.
|
|
* @method useLegacyEvent
|
|
* @static
|
|
* @private
|
|
*/
|
|
useLegacyEvent: function(el, sType) {
|
|
if (!el.addEventListener && !el.attachEvent) {
|
|
return true;
|
|
} else if (this.isSafari) {
|
|
if ("click" == sType || "dblclick" == sType) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
},
|
|
|
|
/**
|
|
* Removes an event handler
|
|
*
|
|
* @method removeListener
|
|
*
|
|
* @param {Object} el the html element or the id of the element to
|
|
* assign the event to.
|
|
* @param {String} sType the type of event to remove.
|
|
* @param {Function} fn the method the event invokes. If fn is
|
|
* undefined, then all event handlers for the type of event are
|
|
* removed.
|
|
* @return {boolean} true if the unbind was successful, false
|
|
* otherwise.
|
|
* @static
|
|
*/
|
|
removeListener: function(el, sType, fn) {
|
|
var i, len;
|
|
|
|
// The el argument can be a string
|
|
if (typeof el == "string") {
|
|
el = this.getEl(el);
|
|
// The el argument can be an array of elements or element ids.
|
|
} else if ( this._isValidCollection(el)) {
|
|
var ok = true;
|
|
for (i=0,len=el.length; i<len; ++i) {
|
|
ok = ( this.removeListener(el[i], sType, fn) && ok );
|
|
}
|
|
return ok;
|
|
}
|
|
|
|
if (!fn || !fn.call) {
|
|
//return false;
|
|
return this.purgeElement(el, false, sType);
|
|
}
|
|
|
|
if ("unload" == sType) {
|
|
|
|
for (i=0, len=unloadListeners.length; i<len; i++) {
|
|
var li = unloadListeners[i];
|
|
if (li &&
|
|
li[0] == el &&
|
|
li[1] == sType &&
|
|
li[2] == fn) {
|
|
unloadListeners.splice(i, 1);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
var cacheItem = null;
|
|
|
|
// The index is a hidden parameter; needed to remove it from
|
|
// the method signature because it was tempting users to
|
|
// try and take advantage of it, which is not possible.
|
|
var index = arguments[3];
|
|
|
|
if ("undefined" == typeof index) {
|
|
index = this._getCacheIndex(el, sType, fn);
|
|
}
|
|
|
|
if (index >= 0) {
|
|
cacheItem = listeners[index];
|
|
}
|
|
|
|
if (!el || !cacheItem) {
|
|
return false;
|
|
}
|
|
|
|
if (this.useLegacyEvent(el, sType)) {
|
|
var legacyIndex = this.getLegacyIndex(el, sType);
|
|
var llist = legacyHandlers[legacyIndex];
|
|
if (llist) {
|
|
for (i=0, len=llist.length; i<len; ++i) {
|
|
li = llist[i];
|
|
if (li &&
|
|
li[this.EL] == el &&
|
|
li[this.TYPE] == sType &&
|
|
li[this.FN] == fn) {
|
|
llist.splice(i, 1);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
} else {
|
|
this._simpleRemove(el, sType, cacheItem[this.WFN], false);
|
|
}
|
|
|
|
// removed the wrapped handler
|
|
delete listeners[index][this.WFN];
|
|
delete listeners[index][this.FN];
|
|
listeners.splice(index, 1);
|
|
|
|
return true;
|
|
|
|
},
|
|
|
|
/**
|
|
* Returns the event's target element
|
|
* @method getTarget
|
|
* @param {Event} ev the event
|
|
* @param {boolean} resolveTextNode when set to true the target's
|
|
* parent will be returned if the target is a
|
|
* text node. @deprecated, the text node is
|
|
* now resolved automatically
|
|
* @return {HTMLElement} the event's target
|
|
* @static
|
|
*/
|
|
getTarget: function(ev, resolveTextNode) {
|
|
var t = ev.target || ev.srcElement;
|
|
return this.resolveTextNode(t);
|
|
},
|
|
|
|
/**
|
|
* In some cases, some browsers will return a text node inside
|
|
* the actual element that was targeted. This normalizes the
|
|
* return value for getTarget and getRelatedTarget.
|
|
* @method resolveTextNode
|
|
* @param {HTMLElement} node node to resolve
|
|
* @return {HTMLElement} the normized node
|
|
* @static
|
|
*/
|
|
resolveTextNode: function(node) {
|
|
// if (node && node.nodeName &&
|
|
// "#TEXT" == node.nodeName.toUpperCase()) {
|
|
if (node && 3 == node.nodeType) {
|
|
return node.parentNode;
|
|
} else {
|
|
return node;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Returns the event's pageX
|
|
* @method getPageX
|
|
* @param {Event} ev the event
|
|
* @return {int} the event's pageX
|
|
* @static
|
|
*/
|
|
getPageX: function(ev) {
|
|
var x = ev.pageX;
|
|
if (!x && 0 !== x) {
|
|
x = ev.clientX || 0;
|
|
|
|
if ( this.isIE ) {
|
|
x += this._getScrollLeft();
|
|
}
|
|
}
|
|
|
|
return x;
|
|
},
|
|
|
|
/**
|
|
* Returns the event's pageY
|
|
* @method getPageY
|
|
* @param {Event} ev the event
|
|
* @return {int} the event's pageY
|
|
* @static
|
|
*/
|
|
getPageY: function(ev) {
|
|
var y = ev.pageY;
|
|
if (!y && 0 !== y) {
|
|
y = ev.clientY || 0;
|
|
|
|
if ( this.isIE ) {
|
|
y += this._getScrollTop();
|
|
}
|
|
}
|
|
|
|
return y;
|
|
},
|
|
|
|
/**
|
|
* Returns the pageX and pageY properties as an indexed array.
|
|
* @method getXY
|
|
* @type int[]
|
|
* @static
|
|
*/
|
|
getXY: function(ev) {
|
|
return [this.getPageX(ev), this.getPageY(ev)];
|
|
},
|
|
|
|
/**
|
|
* Returns the event's related target
|
|
* @method getRelatedTarget
|
|
* @param {Event} ev the event
|
|
* @return {HTMLElement} the event's relatedTarget
|
|
* @static
|
|
*/
|
|
getRelatedTarget: function(ev) {
|
|
var t = ev.relatedTarget;
|
|
if (!t) {
|
|
if (ev.type == "mouseout") {
|
|
t = ev.toElement;
|
|
} else if (ev.type == "mouseover") {
|
|
t = ev.fromElement;
|
|
}
|
|
}
|
|
|
|
return this.resolveTextNode(t);
|
|
},
|
|
|
|
/**
|
|
* Returns the time of the event. If the time is not included, the
|
|
* event is modified using the current time.
|
|
* @method getTime
|
|
* @param {Event} ev the event
|
|
* @return {Date} the time of the event
|
|
* @static
|
|
*/
|
|
getTime: function(ev) {
|
|
if (!ev.time) {
|
|
var t = new Date().getTime();
|
|
try {
|
|
ev.time = t;
|
|
} catch(e) {
|
|
return t;
|
|
}
|
|
}
|
|
|
|
return ev.time;
|
|
},
|
|
|
|
/**
|
|
* Convenience method for stopPropagation + preventDefault
|
|
* @method stopEvent
|
|
* @param {Event} ev the event
|
|
* @static
|
|
*/
|
|
stopEvent: function(ev) {
|
|
this.stopPropagation(ev);
|
|
this.preventDefault(ev);
|
|
},
|
|
|
|
/**
|
|
* Stops event propagation
|
|
* @method stopPropagation
|
|
* @param {Event} ev the event
|
|
* @static
|
|
*/
|
|
stopPropagation: function(ev) {
|
|
if (ev.stopPropagation) {
|
|
ev.stopPropagation();
|
|
} else {
|
|
ev.cancelBubble = true;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Prevents the default behavior of the event
|
|
* @method preventDefault
|
|
* @param {Event} ev the event
|
|
* @static
|
|
*/
|
|
preventDefault: function(ev) {
|
|
if (ev.preventDefault) {
|
|
ev.preventDefault();
|
|
} else {
|
|
ev.returnValue = false;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Finds the event in the window object, the caller's arguments, or
|
|
* in the arguments of another method in the callstack. This is
|
|
* executed automatically for events registered through the event
|
|
* manager, so the implementer should not normally need to execute
|
|
* this function at all.
|
|
* @method getEvent
|
|
* @param {Event} e the event parameter from the handler
|
|
* @return {Event} the event
|
|
* @static
|
|
*/
|
|
getEvent: function(e) {
|
|
var ev = e || window.event;
|
|
|
|
if (!ev) {
|
|
var c = this.getEvent.caller;
|
|
while (c) {
|
|
ev = c.arguments[0];
|
|
if (ev && Event == ev.constructor) {
|
|
break;
|
|
}
|
|
c = c.caller;
|
|
}
|
|
}
|
|
|
|
return ev;
|
|
},
|
|
|
|
/**
|
|
* Returns the charcode for an event
|
|
* @method getCharCode
|
|
* @param {Event} ev the event
|
|
* @return {int} the event's charCode
|
|
* @static
|
|
*/
|
|
getCharCode: function(ev) {
|
|
return ev.charCode || ev.keyCode || 0;
|
|
},
|
|
|
|
/**
|
|
* Locating the saved event handler data by function ref
|
|
*
|
|
* @method _getCacheIndex
|
|
* @static
|
|
* @private
|
|
*/
|
|
_getCacheIndex: function(el, sType, fn) {
|
|
for (var i=0,len=listeners.length; i<len; ++i) {
|
|
var li = listeners[i];
|
|
if ( li &&
|
|
li[this.FN] == fn &&
|
|
li[this.EL] == el &&
|
|
li[this.TYPE] == sType ) {
|
|
return i;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
},
|
|
|
|
/**
|
|
* Generates an unique ID for the element if it does not already
|
|
* have one.
|
|
* @method generateId
|
|
* @param el the element to create the id for
|
|
* @return {string} the resulting id of the element
|
|
* @static
|
|
*/
|
|
generateId: function(el) {
|
|
var id = el.id;
|
|
|
|
if (!id) {
|
|
id = "yuievtautoid-" + counter;
|
|
++counter;
|
|
el.id = id;
|
|
}
|
|
|
|
return id;
|
|
},
|
|
|
|
/**
|
|
* We want to be able to use getElementsByTagName as a collection
|
|
* to attach a group of events to. Unfortunately, different
|
|
* browsers return different types of collections. This function
|
|
* tests to determine if the object is array-like. It will also
|
|
* fail if the object is an array, but is empty.
|
|
* @method _isValidCollection
|
|
* @param o the object to test
|
|
* @return {boolean} true if the object is array-like and populated
|
|
* @static
|
|
* @private
|
|
*/
|
|
_isValidCollection: function(o) {
|
|
// this.logger.debug(o.constructor.toString())
|
|
// this.logger.debug(typeof o)
|
|
|
|
return ( o && // o is something
|
|
o.length && // o is indexed
|
|
typeof o != "string" && // o is not a string
|
|
!o.tagName && // o is not an HTML element
|
|
!o.alert && // o is not a window
|
|
typeof o[0] != "undefined" );
|
|
|
|
},
|
|
|
|
/**
|
|
* @private
|
|
* @property elCache
|
|
* DOM element cache
|
|
* @static
|
|
*/
|
|
elCache: {},
|
|
|
|
/**
|
|
* We cache elements bound by id because when the unload event
|
|
* fires, we can no longer use document.getElementById
|
|
* @method getEl
|
|
* @static
|
|
* @private
|
|
*/
|
|
getEl: function(id) {
|
|
return document.getElementById(id);
|
|
},
|
|
|
|
/**
|
|
* Clears the element cache
|
|
* @deprecated Elements are not cached any longer
|
|
* @method clearCache
|
|
* @static
|
|
* @private
|
|
*/
|
|
clearCache: function() { },
|
|
|
|
/**
|
|
* hook up any deferred listeners
|
|
* @method _load
|
|
* @static
|
|
* @private
|
|
*/
|
|
_load: function(e) {
|
|
loadComplete = true;
|
|
var EU = YAHOO.util.Event;
|
|
// Remove the listener to assist with the IE memory issue, but not
|
|
// for other browsers because FF 1.0x does not like it.
|
|
if (this.isIE) {
|
|
EU._simpleRemove(window, "load", EU._load);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Polling function that runs before the onload event fires,
|
|
* attempting to attach to DOM Nodes as soon as they are
|
|
* available
|
|
* @method _tryPreloadAttach
|
|
* @static
|
|
* @private
|
|
*/
|
|
_tryPreloadAttach: function() {
|
|
|
|
if (this.locked) {
|
|
return false;
|
|
}
|
|
|
|
this.locked = true;
|
|
|
|
// keep trying until after the page is loaded. We need to
|
|
// check the page load state prior to trying to bind the
|
|
// elements so that we can be certain all elements have been
|
|
// tested appropriately
|
|
var tryAgain = !loadComplete;
|
|
if (!tryAgain) {
|
|
tryAgain = (retryCount > 0);
|
|
}
|
|
|
|
// onAvailable
|
|
var notAvail = [];
|
|
for (var i=0,len=onAvailStack.length; i<len ; ++i) {
|
|
var item = onAvailStack[i];
|
|
if (item) {
|
|
var el = this.getEl(item.id);
|
|
|
|
if (el) {
|
|
// The element is available, but not necessarily ready
|
|
|
|
if ( !item.checkReady ||
|
|
loadComplete ||
|
|
el.nextSibling ||
|
|
(document && document.body) ) {
|
|
|
|
var scope = el;
|
|
if (item.override) {
|
|
if (item.override === true) {
|
|
scope = item.obj;
|
|
} else {
|
|
scope = item.override;
|
|
}
|
|
}
|
|
item.fn.call(scope, item.obj);
|
|
delete onAvailStack[i];
|
|
}
|
|
} else {
|
|
notAvail.push(item);
|
|
}
|
|
}
|
|
}
|
|
|
|
retryCount = (notAvail.length === 0) ? 0 : retryCount - 1;
|
|
|
|
if (tryAgain) {
|
|
this.startInterval();
|
|
} else {
|
|
clearInterval(this._interval);
|
|
this._interval = null;
|
|
}
|
|
|
|
this.locked = false;
|
|
|
|
return true;
|
|
|
|
},
|
|
|
|
/**
|
|
* Removes all listeners attached to the given element via addListener.
|
|
* Optionally, the node's children can also be purged.
|
|
* Optionally, you can specify a specific type of event to remove.
|
|
* @method purgeElement
|
|
* @param {HTMLElement} el the element to purge
|
|
* @param {boolean} recurse recursively purge this element's children
|
|
* as well. Use with caution.
|
|
* @param {string} sType optional type of listener to purge. If
|
|
* left out, all listeners will be removed
|
|
* @static
|
|
*/
|
|
purgeElement: function(el, recurse, sType) {
|
|
var elListeners = this.getListeners(el, sType);
|
|
if (elListeners) {
|
|
for (var i=0,len=elListeners.length; i<len ; ++i) {
|
|
var l = elListeners[i];
|
|
// can't use the index on the changing collection
|
|
//this.removeListener(el, l.type, l.fn, l.index);
|
|
this.removeListener(el, l.type, l.fn);
|
|
}
|
|
}
|
|
|
|
if (recurse && el && el.childNodes) {
|
|
for (i=0,len=el.childNodes.length; i<len ; ++i) {
|
|
this.purgeElement(el.childNodes[i], recurse, sType);
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Returns all listeners attached to the given element via addListener.
|
|
* Optionally, you can specify a specific type of event to return.
|
|
* @method getListeners
|
|
* @param el {HTMLElement} the element to inspect
|
|
* @param sType {string} optional type of listener to return. If
|
|
* left out, all listeners will be returned
|
|
* @return {Object} the listener. Contains the following fields:
|
|
* type: (string) the type of event
|
|
* fn: (function) the callback supplied to addListener
|
|
* obj: (object) the custom object supplied to addListener
|
|
* adjust: (boolean) whether or not to adjust the default scope
|
|
* index: (int) its position in the Event util listener cache
|
|
* @static
|
|
*/
|
|
getListeners: function(el, sType) {
|
|
var elListeners = [];
|
|
if (listeners && listeners.length > 0) {
|
|
for (var i=0,len=listeners.length; i<len ; ++i) {
|
|
var l = listeners[i];
|
|
if ( l && l[this.EL] === el &&
|
|
(!sType || sType === l[this.TYPE]) ) {
|
|
elListeners.push({
|
|
type: l[this.TYPE],
|
|
fn: l[this.FN],
|
|
obj: l[this.OBJ],
|
|
adjust: l[this.ADJ_SCOPE],
|
|
index: i
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
return (elListeners.length) ? elListeners : null;
|
|
},
|
|
|
|
/**
|
|
* Removes all listeners registered by pe.event. Called
|
|
* automatically during the unload event.
|
|
* @method _unload
|
|
* @static
|
|
* @private
|
|
*/
|
|
_unload: function(e) {
|
|
|
|
var EU = YAHOO.util.Event, i, j, l, len, index;
|
|
|
|
for (i=0,len=unloadListeners.length; i<len; ++i) {
|
|
l = unloadListeners[i];
|
|
if (l) {
|
|
var scope = window;
|
|
if (l[EU.ADJ_SCOPE]) {
|
|
if (l[EU.ADJ_SCOPE] === true) {
|
|
scope = l[EU.OBJ];
|
|
} else {
|
|
scope = l[EU.ADJ_SCOPE];
|
|
}
|
|
}
|
|
l[EU.FN].call(scope, EU.getEvent(e), l[EU.OBJ] );
|
|
delete unloadListeners[i];
|
|
l=null;
|
|
scope=null;
|
|
}
|
|
}
|
|
|
|
if (listeners && listeners.length > 0) {
|
|
j = listeners.length;
|
|
while (j) {
|
|
index = j-1;
|
|
l = listeners[index];
|
|
if (l) {
|
|
EU.removeListener(l[EU.EL], l[EU.TYPE],
|
|
l[EU.FN], index);
|
|
}
|
|
j = j - 1;
|
|
}
|
|
l=null;
|
|
|
|
EU.clearCache();
|
|
}
|
|
|
|
for (i=0,len=legacyEvents.length; i<len; ++i) {
|
|
// dereference the element
|
|
delete legacyEvents[i][0];
|
|
// delete the array item
|
|
delete legacyEvents[i];
|
|
}
|
|
|
|
EU._simpleRemove(window, "unload", EU._unload);
|
|
|
|
},
|
|
|
|
/**
|
|
* Returns scrollLeft
|
|
* @method _getScrollLeft
|
|
* @static
|
|
* @private
|
|
*/
|
|
_getScrollLeft: function() {
|
|
return this._getScroll()[1];
|
|
},
|
|
|
|
/**
|
|
* Returns scrollTop
|
|
* @method _getScrollTop
|
|
* @static
|
|
* @private
|
|
*/
|
|
_getScrollTop: function() {
|
|
return this._getScroll()[0];
|
|
},
|
|
|
|
/**
|
|
* Returns the scrollTop and scrollLeft. Used to calculate the
|
|
* pageX and pageY in Internet Explorer
|
|
* @method _getScroll
|
|
* @static
|
|
* @private
|
|
*/
|
|
_getScroll: function() {
|
|
var dd = document.documentElement, db = document.body;
|
|
if (dd && (dd.scrollTop || dd.scrollLeft)) {
|
|
return [dd.scrollTop, dd.scrollLeft];
|
|
} else if (db) {
|
|
return [db.scrollTop, db.scrollLeft];
|
|
} else {
|
|
return [0, 0];
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Adds a DOM event directly without the caching, cleanup, scope adj, etc
|
|
*
|
|
* @method _simpleAdd
|
|
* @param {HTMLElement} el the element to bind the handler to
|
|
* @param {string} sType the type of event handler
|
|
* @param {function} fn the callback to invoke
|
|
* @param {boolen} capture capture or bubble phase
|
|
* @static
|
|
* @private
|
|
*/
|
|
_simpleAdd: function () {
|
|
if (window.addEventListener) {
|
|
return function(el, sType, fn, capture) {
|
|
el.addEventListener(sType, fn, (capture));
|
|
};
|
|
} else if (window.attachEvent) {
|
|
return function(el, sType, fn, capture) {
|
|
el.attachEvent("on" + sType, fn);
|
|
};
|
|
} else {
|
|
return function(){};
|
|
}
|
|
}(),
|
|
|
|
/**
|
|
* Basic remove listener
|
|
*
|
|
* @method _simpleRemove
|
|
* @param {HTMLElement} el the element to bind the handler to
|
|
* @param {string} sType the type of event handler
|
|
* @param {function} fn the callback to invoke
|
|
* @param {boolen} capture capture or bubble phase
|
|
* @static
|
|
* @private
|
|
*/
|
|
_simpleRemove: function() {
|
|
if (window.removeEventListener) {
|
|
return function (el, sType, fn, capture) {
|
|
el.removeEventListener(sType, fn, (capture));
|
|
};
|
|
} else if (window.detachEvent) {
|
|
return function (el, sType, fn) {
|
|
el.detachEvent("on" + sType, fn);
|
|
};
|
|
} else {
|
|
return function(){};
|
|
}
|
|
}()
|
|
};
|
|
|
|
}();
|
|
|
|
(function() {
|
|
var EU = YAHOO.util.Event;
|
|
|
|
/**
|
|
* YAHOO.util.Event.on is an alias for addListener
|
|
* @method on
|
|
* @see addListener
|
|
* @static
|
|
*/
|
|
EU.on = EU.addListener;
|
|
|
|
// YAHOO.mix(EU, YAHOO.util.EventProvider.prototype);
|
|
// EU.createEvent("DOMContentReady");
|
|
// EU.subscribe("DOMContentReady", EU._load);
|
|
|
|
if (document && document.body) {
|
|
EU._load();
|
|
} else {
|
|
// EU._simpleAdd(document, "DOMContentLoaded", EU._load);
|
|
EU._simpleAdd(window, "load", EU._load);
|
|
}
|
|
EU._simpleAdd(window, "unload", EU._unload);
|
|
EU._tryPreloadAttach();
|
|
})();
|
|
}
|
|
|
|
/**
|
|
* EventProvider is designed to be used with YAHOO.augment to wrap
|
|
* CustomEvents in an interface that allows events to be subscribed 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 EventProvider
|
|
*/
|
|
YAHOO.util.EventProvider = function() { };
|
|
|
|
YAHOO.util.EventProvider.prototype = {
|
|
|
|
/**
|
|
* Private storage of custom events
|
|
* @property __yui_events
|
|
* @type Object[]
|
|
* @private
|
|
*/
|
|
__yui_events: null,
|
|
|
|
/**
|
|
* Private storage of custom event subscribers
|
|
* @property __yui_subscribers
|
|
* @type Object[]
|
|
* @private
|
|
*/
|
|
__yui_subscribers: null,
|
|
|
|
/**
|
|
* Subscribe to a CustomEvent by event type
|
|
*
|
|
* @method subscribe
|
|
* @param p_type {string} the type, or name of the event
|
|
* @param p_fn {function} the function to exectute when the event fires
|
|
* @param p_obj
|
|
* @param p_obj {Object} An object to be passed along when the event
|
|
* fires
|
|
* @param p_override {boolean} If true, the obj passed in becomes the
|
|
* execution scope of the listener
|
|
*/
|
|
subscribe: function(p_type, p_fn, p_obj, p_override) {
|
|
|
|
this.__yui_events = this.__yui_events || {};
|
|
var ce = this.__yui_events[p_type];
|
|
|
|
if (ce) {
|
|
ce.subscribe(p_fn, p_obj, p_override);
|
|
} else {
|
|
this.__yui_subscribers = this.__yui_subscribers || {};
|
|
var subs = this.__yui_subscribers;
|
|
if (!subs[p_type]) {
|
|
subs[p_type] = [];
|
|
}
|
|
subs[p_type].push(
|
|
{ fn: p_fn, obj: p_obj, override: p_override } );
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Unsubscribes the from the specified event
|
|
* @method unsubscribe
|
|
* @param p_type {string} The type, or name of the event
|
|
* @param p_fn {Function} The function to execute
|
|
* @param p_obj {Object} The custom object passed to subscribe (optional)
|
|
* @return {boolean} true if the subscriber was found and detached.
|
|
*/
|
|
unsubscribe: function(p_type, p_fn, p_obj) {
|
|
this.__yui_events = this.__yui_events || {};
|
|
var ce = this.__yui_events[p_type];
|
|
if (ce) {
|
|
return ce.unsubscribe(p_fn, p_obj);
|
|
} else {
|
|
return false;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* 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 createEvent
|
|
*
|
|
* @param p_type {string} the type, or name of the event
|
|
* @param p_config {object} optional config params. Valid properties are:
|
|
*
|
|
* <ul>
|
|
* <li>
|
|
* scope: defines the default execution scope. If not defined
|
|
* the default scope will be this instance.
|
|
* </li>
|
|
* <li>
|
|
* silent: if true, the custom event will not generate log messages.
|
|
* This is false by default.
|
|
* </li>
|
|
* <li>
|
|
* onSubscribeCallback: specifies a callback to execute when the
|
|
* event has a new subscriber. This will fire immediately for
|
|
* each queued subscriber if any exist prior to the creation of
|
|
* the event.
|
|
* </li>
|
|
* </ul>
|
|
*
|
|
* @return {CustomEvent} the custom event
|
|
*
|
|
*/
|
|
createEvent: function(p_type, p_config) {
|
|
|
|
this.__yui_events = this.__yui_events || {};
|
|
var opts = p_config || {};
|
|
var events = this.__yui_events;
|
|
|
|
if (events[p_type]) {
|
|
} else {
|
|
|
|
var scope = opts.scope || this;
|
|
var silent = opts.silent || null;
|
|
|
|
var ce = new YAHOO.util.CustomEvent(p_type, scope, silent,
|
|
YAHOO.util.CustomEvent.FLAT);
|
|
events[p_type] = ce;
|
|
|
|
if (opts.onSubscribeCallback) {
|
|
ce.subscribeEvent.subscribe(opts.onSubscribeCallback);
|
|
}
|
|
|
|
this.__yui_subscribers = this.__yui_subscribers || {};
|
|
var qs = this.__yui_subscribers[p_type];
|
|
|
|
if (qs) {
|
|
for (var i=0; i<qs.length; ++i) {
|
|
ce.subscribe(qs[i].fn, qs[i].obj, qs[i].override);
|
|
}
|
|
}
|
|
}
|
|
|
|
return events[p_type];
|
|
},
|
|
|
|
/**
|
|
* Fire a custom event by name. The callback functions will be executed
|
|
* from the scope specified when the event was created, and with the
|
|
* following parameters:
|
|
* <ul>
|
|
* <li>The first argument fire() was executed with</li>
|
|
* <li>The custom object (if any) that was passed into the subscribe()
|
|
* method</li>
|
|
* </ul>
|
|
* @method fireEvent
|
|
* @param p_type {string} the type, or name of the event
|
|
* @param arguments {Object*} an arbitrary set of parameters to pass to
|
|
* the handler.
|
|
* @return {boolean} the return value from CustomEvent.fire, or null if
|
|
* the custom event does not exist.
|
|
*/
|
|
fireEvent: function(p_type, arg1, arg2, etc) {
|
|
|
|
this.__yui_events = this.__yui_events || {};
|
|
var ce = this.__yui_events[p_type];
|
|
|
|
if (ce) {
|
|
var args = [];
|
|
for (var i=1; i<arguments.length; ++i) {
|
|
args.push(arguments[i]);
|
|
}
|
|
return ce.fire.apply(ce, args);
|
|
} else {
|
|
return null;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Returns true if the custom event of the provided type has been created
|
|
* with createEvent.
|
|
* @method hasEvent
|
|
* @param type {string} the type, or name of the event
|
|
*/
|
|
hasEvent: function(type) {
|
|
if (this.__yui_events) {
|
|
if (this.__yui_events[type]) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
};
|
|
|