event-facade-dom.js revision 011173392d3a1a59092095d5a24857134cb16f93
/**
* Custom event engine, DOM event listener abstraction layer, synthetic DOM
* events.
* @module event
* @submodule event-base
*/
/**
* Wraps a DOM event, properties requiring browser abstraction are
* fixed here. Provids a security layer when required.
* @class DOMEventFacade
* @param ev {Event} the DOM event
* @param currentTarget {HTMLElement} the element the listener was attached to
* @param wrapper {Event.Custom} the custom event wrapper for this DOM event
*/
var ua = Y.UA,
EMPTY = {},
/**
* webkit key remapping required for Safari < 3.1
* @property webkitKeymap
* @private
*/
webkitKeymap = {
63232: 38, // up
63233: 40, // down
63234: 37, // left
63235: 39, // right
63276: 33, // page up
63277: 34, // page down
25: 9, // SHIFT-TAB (Safari provides a different key code in
// this case, even though the shiftKey modifier is set)
63272: 46, // delete
63273: 36, // home
63275: 35 // end
},
/**
* Returns a wrapped node. Intended to be used on event targets,
* so it will return the node's parent if the target is a text
* node.
*
* If accessing a property of the node throws an error, this is
* probably the anonymous div wrapper Gecko adds inside text
* nodes. This likely will only occur when attempting to access
* the relatedTarget. In this case, we now return null because
* the anonymous div is completely useless and we do not know
* what the related target was because we can't even get to
* the element's parent node.
*
* @method resolve
* @private
*/
resolve = function(n) {
if (!n) {
return n;
}
try {
if (n && 3 == n.nodeType) {
n = n.parentNode;
}
} catch(e) {
return null;
}
return Y.one(n);
},
DOMEventFacade = function(ev, currentTarget, wrapper) {
this._event = ev;
this._currentTarget = currentTarget;
this._wrapper = wrapper || EMPTY;
// if not lazy init
this.init();
};
Y.extend(DOMEventFacade, Object, {
init: function() {
var e = this._event,
overrides = this._wrapper.overrides,
x = e.pageX,
y = e.pageY,
c,
currentTarget = this._currentTarget;
this.altKey = e.altKey;
this.ctrlKey = e.ctrlKey;
this.metaKey = e.metaKey;
this.shiftKey = e.shiftKey;
this.type = (overrides && overrides.type) || e.type;
this.clientX = e.clientX;
this.clientY = e.clientY;
this.pageX = x;
this.pageY = y;
c = e.keyCode || e.charCode || 0;
if (ua.webkit && (c in webkitKeymap)) {
c = webkitKeymap[c];
}
this.keyCode = c;
this.charCode = c;
this.button = e.which || e.button;
this.which = this.button;
this.target = resolve(e.target);
this.currentTarget = resolve(currentTarget);
this.relatedTarget = resolve(e.relatedTarget);
if (e.type == "mousewheel" || e.type == "DOMMouseScroll") {
this.wheelDelta = (e.detail) ? (e.detail * -1) : Math.round(e.wheelDelta / 80) || ((e.wheelDelta < 0) ? -1 : 1);
}
if (this._touch) {
this._touch(e, currentTarget, this._wrapper);
}
},
stopPropagation: function() {
this._event.stopPropagation();
this._wrapper.stopped = 1;
this.stopped = 1;
},
stopImmediatePropagation: function() {
var e = this._event;
if (e.stopImmediatePropagation) {
e.stopImmediatePropagation();
} else {
this.stopPropagation();
}
this._wrapper.stopped = 2;
this.stopped = 2;
},
preventDefault: function(returnValue) {
var e = this._event;
e.preventDefault();
e.returnValue = returnValue || false;
this._wrapper.prevented = 1;
this.prevented = 1;
},
halt: function(immediate) {
if (immediate) {
this.stopImmediatePropagation();
} else {
this.stopPropagation();
}
this.preventDefault();
}
});
DOMEventFacade.resolve = resolve;
Y.DOM2EventFacade = DOMEventFacade;
Y.DOMEventFacade = DOMEventFacade;
/**
* The native event
* @property _event
*/
/**
* The X location of the event on the page (including scroll)
* @property pageX
* @type int
*/
/**
* The Y location of the event on the page (including scroll)
* @property pageY
* @type int
*/
/**
* The keyCode for key events. Uses charCode if keyCode is not available
* @property keyCode
* @type int
*/
/**
* The charCode for key events. Same as keyCode
* @property charCode
* @type int
*/
/**
* The button that was pushed.
* @property button
* @type int
*/
/**
* The button that was pushed. Same as button.
* @property which
* @type int
*/
/**
* Node reference for the targeted element
* @propery target
* @type Node
*/
/**
* Node reference for the element that the listener was attached to.
* @propery currentTarget
* @type Node
*/
/**
* Node reference to the relatedTarget
* @propery relatedTarget
* @type Node
*/
/**
* Number representing the direction and velocity of the movement of the mousewheel.
* Negative is down, the higher the number, the faster. Applies to the mousewheel event.
* @property wheelDelta
* @type int
*/
/**
* Stops the propagation to the next bubble target
* @method stopPropagation
*/
/**
* Stops the propagation to the next bubble target and
* prevents any additional listeners from being exectued
* on the current target.
* @method stopImmediatePropagation
*/
/**
* Prevents the event's default behavior
* @method preventDefault
* @param returnValue {string} sets the returnValue of the event to this value
* (rather than the default false value). This can be used to add a customized
* confirmation query to the beforeunload event).
*/
/**
* Stops the event propagation and prevents the default
* event behavior.
* @method halt
* @param immediate {boolean} if true additional listeners
* on the current target will not be executed
*/