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-/*
-Copyright (c) 2006 Yahoo! Inc. All rights reserved.
-version 0.9.0
-*/
-
-/**
- * @class The CustomEvent class lets you define events for your application
- * that can be subscribed to by one or more independent component.
- * @param {String} type The type of event, which is passed to the callback
- * when the event fires
- * @param {Object} oScope The context the event will fire from. "this" will
- * refer to this object in the callback. Default value:
- * the window object. The listener can override this.
- * @constructor
- */
-YAHOO.util.CustomEvent = function(type, oScope) {
- /**
- * The type of event, returned to subscribers when the event fires
- * @type string
- */
- this.type = type;
-
- /**
- * The scope the the event will fire from. Defaults to the window obj
- * @type object
- */
- this.scope = oScope || window;
-
- /**
- * The subscribers to this event
- * @type array
- */
- this.subscribers = [];
-
- // Register with the event utility for automatic cleanup. Made optional
- // so that CustomEvent can be used independently of pe.event
- if (YAHOO.util["Event"]) {
- YAHOO.util.Event.regCE(this);
- }
-};
-
-YAHOO.util.CustomEvent.prototype = {
- /**
- * Subscribes the caller to this event
- * @param {Function} fn The function to execute
- * @param {Object} obj An object to be passed along when the event fires
- * @param {boolean} bOverride If true, the obj passed in becomes the execution
- * scope of the listener
- */
- subscribe: function(fn, obj, bOverride) {
- this.subscribers.push( new YAHOO.util.Subscriber(fn, obj, bOverride) );
- },
-
- /**
- * Unsubscribes the caller from this event
- * @param {Function} fn The function to execute
- * @param {Object} obj An object to be passed along when the event fires
- * @return {boolean} True if the subscriber was found and detached.
- */
- unsubscribe: function(fn, obj) {
- var found = false;
- for (var i=0; i<this.subscribers.length; ++i) {
- var s = this.subscribers[i];
- if (s && s.contains(fn, obj)) {
- this._delete(i);
- found = true;
- }
- }
-
- return found;
- },
-
- /**
- * Notifies the subscribers. The callback functions will be executed
- * from the scope specified when the event was created, and with the following
- * parameters:
- * <pre>
- * - The type of event
- * - All of the arguments fire() was executed with as an array
- * - The custom object (if any) that was passed into the subscribe() method
- * </pre>
- *
- * @param {Array} an arbitrary set of parameters to pass to the handler
- */
- fire: function() {
- for (var i=0; i<this.subscribers.length; ++i) {
- var s = this.subscribers[i];
- if (s) {
- var scope = (s.override) ? s.obj : this.scope;
- s.fn.call(scope, this.type, arguments, s.obj);
- }
- }
- },
-
- /**
- * Removes all listeners
- */
- unsubscribeAll: function() {
- for (var i=0; i<this.subscribers.length; ++i) {
- this._delete(i);
- }
- },
-
- /**
- * @private
- */
- _delete: function(index) {
- var s = this.subscribers[index];
- if (s) {
- delete s.fn;
- delete s.obj;
- }
-
- delete this.subscribers[index];
- }
-};
-
-/////////////////////////////////////////////////////////////////////
-
-/**
- * @class
- * @param {Function} fn The function to execute
- * @param {Object} obj An object to be passed along when the event fires
- * @param {boolean} bOverride If true, the obj passed in becomes the execution
- * scope of the listener
- * @constructor
- */
-YAHOO.util.Subscriber = function(fn, obj, bOverride) {
- /**
- * The callback that will be execute when the event fires
- * @type function
- */
- this.fn = fn;
-
- /**
- * An optional custom object that will passed to the callback when
- * the event fires
- * @type object
- */
- this.obj = obj || null;
-
- /**
- * The default execution scope for the event listener is defined when the
- * event is created (usually the object which contains the event).
- * By setting override to true, the execution scope becomes the custom
- * object passed in by the subscriber
- * @type boolean
- */
- this.override = (bOverride);
-};
-
-/**
- * Returns true if the fn and obj match this objects properties.
- * Used by the unsubscribe method to match the right subscriber.
- *
- * @param {Function} fn the function to execute
- * @param {Object} obj an object to be passed along when the event fires
- * @return {boolean} true if the supplied arguments match this
- * subscriber's signature.
- */
-YAHOO.util.Subscriber.prototype.contains = function(fn, obj) {
- return (this.fn == fn && this.obj == obj);
-};
-
-/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
-
-// Only load this library once. If it is loaded a second time, existing
-// events cannot be detached.
-if (!YAHOO.util.Event) {
-
-/**
- * The event utility provides functions to add and remove event listeners,
- * event cleansing. It also tries to automatically remove listeners it
- * registers during the unload event.
- * @class
- * @constructor
- */
- YAHOO.util.Event = function() {
-
- /**
- * True after the onload event has fired
- * @type boolean
- * @private
- */
- var loadComplete = false;
-
- /**
- * Cache of wrapped listeners
- * @type array
- * @private
- */
- var listeners = [];
-
- /**
- * Listeners that will be attached during the onload event
- * @type array
- * @private
- */
- var delayedListeners = [];
-
- /**
- * User-defined unload function that will be fired before all events
- * are detached
- * @type array
- * @private
- */
- var unloadListeners = [];
-
- /**
- * Cache of the custom events that have been defined. Used for
- * automatic cleanup
- * @type array
- * @private
- */
- var customEvents = [];
-
- /**
- * Cache of DOM0 event handlers to work around issues with DOM2 events
- * in Safari
- * @private
- */
- var legacyEvents = [];
-
- /**
- * Listener stack for DOM0 events
- * @private
- */
- var legacyHandlers = [];
-
- return { // PREPROCESS
-
- /**
- * Element to bind, int constant
- * @type int
- */
- EL: 0,
-
- /**
- * Type of event, int constant
- * @type int
- */
- TYPE: 1,
-
- /**
- * Function to execute, int constant
- * @type int
- */
- FN: 2,
-
- /**
- * Function wrapped for scope correction and cleanup, int constant
- * @type int
- */
- WFN: 3,
-
- /**
- * Object passed in by the user that will be returned as a
- * parameter to the callback, int constant
- * @type int
- */
- SCOPE: 3,
-
- /**
- * Adjusted scope, either the element we are registering the event
- * on or the custom object passed in by the listener, int constant
- * @type int
- */
- ADJ_SCOPE: 4,
-
- /**
- * Safari detection is necessary to work around the preventDefault
- * bug that makes it so you can't cancel a href click from the
- * handler. There is not a capabilities check we can use here.
- * @private
- */
- isSafari: (navigator.userAgent.match(/safari/gi)),
-
- /**
- * @private
- * IE detection needed to properly calculate pageX and pageY.
- * capabilities checking didn't seem to work because another
- * browser that does not provide the properties have the values
- * calculated in a different manner than IE.
- */
- isIE: (!this.isSafari && navigator.userAgent.match(/msie/gi)),
-
- /**
- * Appends an event handler
- *
- * @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} oScope An arbitrary object that will be
- * passed as a parameter to the handler
- * @param {boolean} bOverride 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.
- */
- addListener: function(el, sType, fn, oScope, bOverride) {
-
- // The el argument can be an array of elements or element ids.
- if ( this._isValidCollection(el)) {
- var ok = true;
- for (var i=0; i< el.length; ++i) {
- ok = ( this.on(el[i],
- sType,
- fn,
- oScope,
- bOverride) && ok );
- }
- return ok;
-
- } else if (typeof el == "string") {
- // 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 (loadComplete) {
- el = this.getEl(el);
- } else {
- // defer adding the event until onload fires
- delayedListeners[delayedListeners.length] =
- [el, sType, fn, oScope, bOverride];
-
- 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 && oScope !== this) {
- unloadListeners[unloadListeners.length] =
- [el, sType, fn, oScope, bOverride];
- 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 = (bOverride) ? oScope : el;
-
- // wrap the function so we can return the oScope object when
- // the event fires;
- var wrappedFn = function(e) {
- return fn.call(scope, YAHOO.util.Event.getEvent(e),
- oScope);
- };
-
- 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);
- if (legacyIndex == -1) {
-
- legacyIndex = legacyEvents.length;
- // 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);
-
- // DOM2 Event model
- } else if (el.addEventListener) {
- el.addEventListener(sType, wrappedFn, false);
- // Internet Explorer abstraction
- } else if (el.attachEvent) {
- el.attachEvent("on" + sType, wrappedFn);
- }
-
- return true;
-
- },
-
- /**
- * Shorthand for YAHOO.util.Event.addListener
- * @type function
- */
- // on: this.addListener,
-
- /**
- * When using legacy events, the handler is routed to this object
- * so we can fire our custom listener stack.
- * @private
- */
- fireLegacyEvent: function(e, legacyIndex) {
- // alert("fireLegacyEvent " + legacyIndex);
- var ok = true;
-
- // var el = legacyEvents[YAHOO.util.Event.EL];
-
- /* this is not working because the property may get populated
- // fire the event we replaced, if it exists
- var origHandler = legacyEvents[2];
- alert(origHandler);
- if (origHandler && origHandler.call) {
- var ret = origHandler.call(el, e);
- ok = (ret);
- }
- */
-
- var le = legacyHandlers[legacyIndex];
- for (i=0; i < le.length; ++i) {
- var index = le[i];
- // alert(index);
- if (index) {
- var li = listeners[index];
- var scope = li[this.ADJ_SCOPE];
- var ret = li[this.WFN].call(scope, e);
- ok = (ok && ret);
- // alert(ok);
- }
- }
-
- return ok;
- },
-
- /**
- * Returns the legacy event index that matches the supplied
- * signature
- * @private
- */
- getLegacyIndex: function(el, sType) {
- for (var i=0; i < legacyEvents.length; ++i) {
- var le = legacyEvents[i];
- if (le && le[0] == el && le[1] == sType) {
- return i;
- }
- }
-
- return -1;
- },
-
- /**
- * Logic that determines when we should automatically use legacy
- * events instead of DOM2 events.
- * @private
- */
- useLegacyEvent: function(el, sType) {
-
- return ( (!el.addEventListener && !el.attachEvent) ||
- (sType == "click" && this.isSafari) );
- },
-
- /**
- * Removes an event handler
- *
- * @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
- * @return {boolean} true if the unbind was successful, false
- * otherwise
- */
- removeListener: function(el, sType, fn) {
-
- // 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 (var i=0; i< el.length; ++i) {
- ok = ( this.removeListener(el[i], sType, fn) && ok );
- }
- return ok;
- }
-
- var cacheItem = null;
- var index = this._getCacheIndex(el, sType, fn);
-
- if (index >= 0) {
- cacheItem = listeners[index];
- }
-
- if (!el || !cacheItem) {
- return false;
- }
-
-
- if (el.removeEventListener) {
- el.removeEventListener(sType, cacheItem[this.WFN], false);
- // alert("adsf");
- } else if (el.detachEvent) {
- el.detachEvent("on" + sType, cacheItem[this.WFN]);
- }
-
- // removed the wrapped handler
- delete listeners[index][this.WFN];
- delete listeners[index][this.FN];
- delete listeners[index];
-
- return true;
-
- },
-
- /**
- * Returns the event's target element
- * @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
- * @return {HTMLElement} the event's target
- */
- getTarget: function(ev, resolveTextNode) {
- var t = ev.target || ev.srcElement;
-
- if (resolveTextNode && t && "#text" == t.nodeName) {
- return t.parentNode;
- } else {
- return t;
- }
- },
-
- /**
- * Returns the event's pageX
- * @param {Event} ev the event
- * @return {int} the event's pageX
- */
- 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
- * @param {Event} ev the event
- * @return {int} the event's pageY
- */
- 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 event's related target
- * @param {Event} ev the event
- * @return {HTMLElement} the event's relatedTarget
- */
- 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 t;
- },
-
- /**
- * Returns the time of the event. If the time is not included, the
- * event is modified using the current time.
- * @param {Event} ev the event
- * @return {Date} the time of the event
- */
- getTime: function(ev) {
- if (!ev.time) {
- var t = new Date().getTime();
- try {
- ev.time = t;
- } catch(e) {
- // can't set the time property
- return t;
- }
- }
-
- return ev.time;
- },
-
- /**
- * Convenience method for stopPropagation + preventDefault
- * @param {Event} ev the event
- */
- stopEvent: function(ev) {
- this.stopPropagation(ev);
- this.preventDefault(ev);
- },
-
- /**
- * Stops event propagation
- * @param {Event} ev the event
- */
- stopPropagation: function(ev) {
- if (ev.stopPropagation) {
- ev.stopPropagation();
- } else {
- ev.cancelBubble = true;
- }
- },
-
- /**
- * Prevents the default behavior of the event
- * @param {Event} ev the event
- */
- preventDefault: function(ev) {
- if (ev.preventDefault) {
- ev.preventDefault();
- } else {
- ev.returnValue = false;
- }
- },
-
- /**
- * Returns the event, should not be necessary for user to call
- * @param {Event} the event parameter from the handler
- * @return {Event} the event
- */
- 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
- * @param {Event} ev the event
- * @return {int} the event's charCode
- */
- getCharCode: function(ev) {
- return ev.charCode || (ev.type == "keypress") ? ev.keyCode : 0;
- },
-
- /**
- * @private
- * Locating the saved event handler data by function ref
- */
- _getCacheIndex: function(el, sType, fn) {
- for (var i=0; i< listeners.length; ++i) {
- var li = listeners[i];
- if ( li &&
- li[this.FN] == fn &&
- li[this.EL] == el &&
- li[this.TYPE] == sType ) {
- return i;
- }
- }
-
- return -1;
- },
-
- /**
- * 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.
- * @param o the object to test
- * @return {boolean} true if the object is array-like and populated
- */
- _isValidCollection: function(o) {
- // alert(o.constructor.toString())
- // alert(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
- * DOM element cache
- */
- elCache: {},
-
- /**
- * We cache elements bound by id because when the unload event
- * fires, we can no longer use document.getElementById
- * @private
- */
- getEl: function(id) {
- /*
- // this is a problem when replaced via document.getElementById
- if (! this.elCache[id]) {
- try {
- var el = document.getElementById(id);
- if (el) {
- this.elCache[id] = el;
- }
- } catch (er) {
- }
- }
- return this.elCache[id];
- */
-
- return document.getElementById(id);
- },
-
- /**
- * Clears the element cache
- */
- clearCache: function() {
- for (i in this.elCache) {
- delete this.elCache[i];
- }
- },
-
- /**
- * Called by CustomEvent instances to provide a handle to the
- * event * that can be removed later on. Should be package
- * protected.
- * @private
- */
- regCE: function(ce) {
- customEvents.push(ce);
- },
-
- /**
- * @private
- * hook up any deferred listeners
- */
- _load: function(e) {
- loadComplete = true;
- },
-
- /**
- * Polling function that runs before the onload event fires,
- * attempting * to attach to DOM Nodes as soon as they are
- * available
- * @private
- */
- _tryPreloadAttach: function() {
-
- // 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;
-
- for (var i=0; i < delayedListeners.length; ++i) {
- var d = delayedListeners[i];
- // There may be a race condition here, so we need to
- // verify the array element is usable.
- if (d) {
-
- // el will be null if document.getElementById did not
- // work
- var el = this.getEl(d[this.EL]);
-
- if (el) {
- this.on(el, d[this.TYPE], d[this.FN],
- d[this.SCOPE], d[this.ADJ_SCOPE]);
- delete delayedListeners[i];
- }
- }
- }
-
- if (tryAgain) {
- setTimeout("YAHOO.util.Event._tryPreloadAttach()", 50);
- }
- },
-
- /**
- * Removes all listeners registered by pe.event. Called
- * automatically during the unload event.
- */
- _unload: function(e, me) {
- for (var i=0; i < unloadListeners.length; ++i) {
- var l = unloadListeners[i];
- if (l) {
- var scope = (l[this.ADJ_SCOPE]) ? l[this.SCOPE]: window;
- l[this.FN].call(scope, this.getEvent(e), l[this.SCOPE] );
- }
- }
-
- if (listeners && listeners.length > 0) {
- for (i = 0; i < listeners.length; ++i) {
- l = listeners[i];
- if (l) {
- this.removeListener(l[this.EL], l[this.TYPE],
- l[this.FN]);
- }
- }
-
- this.clearCache();
- }
-
- for (i = 0; i < customEvents.length; ++i) {
- customEvents[i].unsubscribeAll();
- delete customEvents[i];
- }
-
- for (i = 0; i < legacyEvents.length; ++i) {
- // dereference the element
- delete legacyEvents[i][0];
- // delete the array item
- delete legacyEvents[i];
- }
- },
-
- /**
- * Returns scrollLeft
- * @private
- */
- _getScrollLeft: function() {
- return this._getScroll()[1];
- },
-
- /**
- * Returns scrollTop
- * @private
- */
- _getScrollTop: function() {
- return this._getScroll()[0];
- },
-
- /**
- * Returns the scrollTop and scrollLeft. Used to calculate the
- * pageX and pageY in Internet Explorer
- * @private
- */
- _getScroll: function() {
- var dd = document.documentElement; db = document.body;
- if (dd && dd.scrollTop) {
- return [dd.scrollTop, dd.scrollLeft];
- } else if (db) {
- return [db.scrollTop, db.scrollLeft];
- } else {
- return [0, 0];
- }
- }
- };
- } ();
-
- YAHOO.util.Event.on = YAHOO.util.Event.addListener;
-
- if (document && document.body) {
- YAHOO.util.Event._load();
- } else {
- YAHOO.util.Event.on(window, "load", YAHOO.util.Event._load,
- YAHOO.util.Event, true);
- }
-
- YAHOO.util.Event.on(window, "unload", YAHOO.util.Event._unload,
- YAHOO.util.Event, true);
-
- YAHOO.util.Event._tryPreloadAttach();
-
-}
-
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-02 02:09:13 +0000