@qooxdoo/framework
Version:
The JS Framework for Coders
139 lines (117 loc) • 3.51 kB
JavaScript
/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2012 1&1 Internet AG, Germany, http://www.1und1.de
License:
MIT: https://opensource.org/licenses/MIT
See the LICENSE file in the project's top-level directory for details.
Authors:
* Daniel Wagner (danielwagner)
************************************************************************ */
/**
* Common normalizations for native events
*
* @require(qx.module.Event)
* @require(qx.bom.Event#getTarget)
* @require(qx.bom.Event#getRelatedTarget)
*
* @group (Event_Normalization)
*/
qx.Bootstrap.define("qx.module.event.Native", {
statics: {
/**
* List of event types to be normalized
*/
TYPES: ["*"],
/**
* List of qx.bom.Event methods to be attached to native event objects
* @internal
*/
FORWARD_METHODS: ["getTarget", "getRelatedTarget"],
/**
* List of qx.module.event.Native methods to be attached to native event objects
* @internal
*/
BIND_METHODS: ["preventDefault", "stopPropagation", "getType"],
/**
* Prevent the native default behavior of the event.
*/
preventDefault() {
try {
// this allows us to prevent some key press events in IE.
// See bug #1049
this.keyCode = 0;
} catch (ex) {}
this.returnValue = false;
},
/**
* Stops the event's propagation to the element's parent
*/
stopPropagation() {
this.cancelBubble = true;
},
/**
* Returns the event's type
*
* @return {String} event type
*/
getType() {
return this._type || this.type;
},
/**
* Returns the target of the event.
*
* @signature function ()
* @return {Object} Any valid native event target
*/
getTarget() {},
/**
* Computes the related target from the native DOM event
*
* @signature function ()
* @return {Element} The related target
*/
getRelatedTarget() {},
/**
* Computes the current target from the native DOM event. Emulates the current target
* for all browsers without native support (like older IEs).
*
* @signature function ()
* @return {Element} The current target
*/
getCurrentTarget() {},
/**
* Manipulates the native event object, adding methods if they're not
* already present
*
* @param event {Event} Native event object
* @param element {Element} DOM element the listener was attached to
* @return {Event} Normalized event object
* @internal
*/
normalize(event, element) {
if (!event) {
return event;
}
var fwdMethods = qx.module.event.Native.FORWARD_METHODS;
for (var i = 0, l = fwdMethods.length; i < l; i++) {
event[fwdMethods[i]] = qx.bom.Event[fwdMethods[i]].bind(null, event);
}
var bindMethods = qx.module.event.Native.BIND_METHODS;
for (var i = 0, l = bindMethods.length; i < l; i++) {
if (typeof event[bindMethods[i]] != "function") {
event[bindMethods[i]] =
qx.module.event.Native[bindMethods[i]].bind(event);
}
}
event.getCurrentTarget = function () {
return event.currentTarget || element;
};
return event;
}
},
defer(statics) {
qxWeb.$registerEventNormalization(statics.TYPES, statics.normalize);
}
});