011173392d3a1a59092095d5a24857134cb16f93Adam Moore * Custom event engine, DOM event listener abstraction layer, synthetic DOM
011173392d3a1a59092095d5a24857134cb16f93Adam Moore * @module event
011173392d3a1a59092095d5a24857134cb16f93Adam Moore * @submodule event-base
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith // IEEventFacade.superclass.constructor.apply(this, arguments);
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * (intentially left out of API docs)
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * Alternate Facade implementation that is based on Object.defineProperty, which
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * is partially supported in IE8. Properties that involve setup work are
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * deferred to temporary getters using the static _define method.
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith // TODO: necessary?
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith proxy.hasOwnProperty = function () { return true; };
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith proxy.stopImmediatePropagation = proto.stopImmediatePropagation;
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smithvar imp = Y.config.doc && Y.config.doc.implementation,
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith init: function() {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith IEEventFacade.superclass.init.apply(this, arguments);
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith var e = this._event,
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith x, y, d, b, de, t;
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith x += (de.scrollLeft || (b && b.scrollLeft) || 0);
466fc0d571f1df5f7b889a59f328ffcdcef0d87fLuke Smith // fallback to t.relatedTarget to support simulated events.
466fc0d571f1df5f7b889a59f328ffcdcef0d87fLuke Smith // IE doesn't support setting toElement or fromElement on generic
466fc0d571f1df5f7b889a59f328ffcdcef0d87fLuke Smith // events, so Y.Event.simulate sets relatedTarget instead.
466fc0d571f1df5f7b889a59f328ffcdcef0d87fLuke Smith this.relatedTarget = resolve(t || e.relatedTarget);
aa087e251c506cac2b1ca195c53f7eb3a9ef7542Luke Smith // which should contain the unicode key code if this is a key event.
aa087e251c506cac2b1ca195c53f7eb3a9ef7542Luke Smith // For click events, which is normalized for which mouse button was
aa087e251c506cac2b1ca195c53f7eb3a9ef7542Luke Smith this.button = e.keyCode || buttonMap[e.button] || e.button;
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke SmithY.extend(IEEventFacade, Y.DOM2EventFacade, proto);
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith var e = this._event,
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith this.type = (overrides && overrides.type) || e.type;
aa087e251c506cac2b1ca195c53f7eb3a9ef7542Luke Smith this.button = e.keyCode || buttonMap[e.button] || e.button;
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith this._touch(e, this._currentTarget, this._wrapper);
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith target: function () {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith relatedTarget: function () {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith var e = this._event,
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith targetProp = relatedTargetMap[e.type] || 'relatedTarget';
466fc0d571f1df5f7b889a59f328ffcdcef0d87fLuke Smith // fallback to t.relatedTarget to support simulated events.
466fc0d571f1df5f7b889a59f328ffcdcef0d87fLuke Smith // IE doesn't support setting toElement or fromElement on generic
466fc0d571f1df5f7b889a59f328ffcdcef0d87fLuke Smith // events, so Y.Event.simulate sets relatedTarget instead.
466fc0d571f1df5f7b889a59f328ffcdcef0d87fLuke Smith return resolve(e[targetProp] || e.relatedTarget);
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith currentTarget: function () {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith wheelDelta: function () {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith var e = this._event;
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith if (e.type === "mousewheel" || e.type === "DOMMouseScroll") {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith return (e.detail) ?
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith // wheelDelta between -80 and 80 result in -1 or 1
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith Math.round(e.wheelDelta / 80) || ((e.wheelDelta < 0) ? -1 : 1);
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith pageX: function () {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith var e = this._event,
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith val = e.clientX + (docScroll || bodyScroll || 0);
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith pageY: function () {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith var e = this._event,
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith val = e.clientY + (docScroll || bodyScroll || 0);
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * Wrapper function for Object.defineProperty that creates a property whose
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * value will be calulated only when asked for. After calculating the value,
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * the getter wll be removed, so it will behave as a normal property beyond that
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * point. A setter is also assigned so assigning to the property will clear
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * the getter, so foo.prop = 'a'; foo.prop; won't trigger the getter,
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * overwriting value 'a'.
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * Used only by the DOMEventFacades used by IE8 when the YUI configuration
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * <code>lazyEventFacade</code> is set to true.
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * @method _define
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * @param o {DOMObject} A DOM object to add the property to
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * @param prop {String} The name of the new property
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * @param valueFn {Function} The function that will return the initial, default
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith * value for the property.
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke SmithIELazyFacade._define = function (o, prop, valueFn) {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith function val(v) {
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith var ret = (arguments.length) ? v : valueFn.call(this);
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith // Make sure we can use the lazy facade logic
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith Object.defineProperty(Y.config.doc.createEventObject(), 'z', {});
cfdfb15e991f069dc5a2c3a724d378a6395d4eacLuke Smith } catch (e) {