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Copyright 2011 Yahoo! Inc. All rights reserved.
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Licensed under the BSD License.
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http://yuilibrary.com/license/
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YUI.add('event-touch', function(Y) {
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* Adds touch event facade normalization properties (touches, changedTouches, targetTouches etc.) to the DOM event facade
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ROTATION = "rotation",
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IDENTIFIER = "identifier";
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* Adds touch event facade normalization properties to the DOM event facade
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* @param ev {Event} the DOM event
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* @param currentTarget {HTMLElement} the element the listener was attached to
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* @param wrapper {Event.Custom} the custom event wrapper for this DOM event
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Y.DOMEventFacade.prototype._touch = function(e, currentTarget, wrapper) {
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var i,l, etCached, et,touchCache;
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Y.log("Calling facade._touch() with e = " + e);
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Y.log("Found e.touches. Replicating on facade");
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* Array of individual touch events for touch points that are still in
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* contact with the touch surface.
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* @type {DOMEventFacade[]}
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for (i = 0, l = e.touches.length; i < l; ++i) {
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touchCache[Y.stamp(et)] = this.touches[i] = new Y.DOMEventFacade(et, currentTarget, wrapper);
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if (e.targetTouches) {
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Y.log("Found e.targetTouches. Replicating on facade");
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* Array of individual touch events still in contact with the touch
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* surface and whose `touchstart` event occurred inside the same taregt
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* element as the current target element.
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* @property targetTouches
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* @type {DOMEventFacade[]}
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this.targetTouches = [];
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for (i = 0, l = e.targetTouches.length; i < l; ++i) {
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et = e.targetTouches[i];
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etCached = touchCache && touchCache[Y.stamp(et, true)];
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this.targetTouches[i] = etCached || new Y.DOMEventFacade(et, currentTarget, wrapper);
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if (etCached) { Y.log("Found native event in touches. Using same facade in targetTouches"); }
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if (e.changedTouches) {
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Y.log("Found e.changedTouches. Replicating on facade");
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An array of event-specific touch events.
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For `touchstart`, the touch points that became active with the current
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For `touchmove`, the touch points that have changed since the last
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For `touchend`, the touch points that have been removed from the touch
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@property changedTouches
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@type {DOMEventFacade[]}
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this.changedTouches = [];
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for (i = 0, l = e.changedTouches.length; i < l; ++i) {
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et = e.changedTouches[i];
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etCached = touchCache && touchCache[Y.stamp(et, true)];
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this.changedTouches[i] = etCached || new Y.DOMEventFacade(et, currentTarget, wrapper);
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if (etCached) { Y.log("Found native event in touches. Using same facade in changedTouches"); }
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this[SCALE] = e[SCALE];
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this[ROTATION] = e[ROTATION];
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if (IDENTIFIER in e) {
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this[IDENTIFIER] = e[IDENTIFIER];
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if (Y.Node.DOM_EVENTS) {
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Y.mix(Y.Node.DOM_EVENTS, {
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}, '3.4.1' ,{requires:['node-base']});