var isString = Y.Lang.isString,
fireMouseEventForNode = function (node, relatedTarget, eventName, e, spec) {
if (!node.compareTo(relatedTarget) && !node.contains(relatedTarget)) {
e.container = e.currentTarget;
e.currentTarget = node;
Y.fire(eventName, e);
}
},
handleMouseEvent = function (e, eventName, spec) {
var relatedTarget = e.relatedTarget,
currentTarget = e.currentTarget,
target = e.target;
if (spec) {
currentTarget.queryAll(spec).some(function (v) {
var bReturnVal;
if (v.compareTo(target) || v.contains(target)) {
fireMouseEventForNode(v, relatedTarget, eventName, e, spec);
bReturnVal = true;
}
return bReturnVal;
});
}
else {
fireMouseEventForNode(currentTarget, relatedTarget, eventName, e);
}
},
sanitize = Y.cached(function (str) {
return str.replace(/[|,:]/g, "~");
}),
eventConfig = {
on: function(type, fn, el, spec) {
var sDOMEvent = (type === "mouseenter") ? "mouseover" : "mouseout",
sEventName = type + ":" + (isString(el) ? el : Y.stamp(el)) + sDOMEvent,
args = Y.Array(arguments, 0, true),
sSelector;
if (isString(spec)) {
sSelector = spec;
sEventName = sEventName + sanitize(sSelector);
}
if (!Y.getEvent(sEventName)) {
// Set up the listener on the container
Y.on(sDOMEvent, function (e) {
handleMouseEvent(e, sEventName, sSelector);
}, el);
}
args[0] = sEventName;
// Remove the element (and the spec--if defined) from the args
if (sSelector) {
args.splice(2, 2);
}
else {
args.splice(2, 1);
}
// Subscribe to the custom event for the delegation spec
return Y.on.apply(Y, args);
}
};
/**
* Sets up a "mouseenter" listener—a listener that is called the first time
* the user's mouse enters the specified element(s). By passing a CSS selector
* as the fourth argument, can also be used to delegate a "mouseenter"
* event listener.
*
* @event mouseenter
* @param type {string} "mouseenter"
* @param fn {string} The method the event invokes.
* @param el {string|node} The element(s) to assign the listener to.
* @param spec {string} Optional. String representing a selector that must
* match the target of the event in order for the listener to be called.
* @return {EventHandle} the detach handle
* @for YUI
*/
Y.Env.evt.plugins.mouseenter = eventConfig;
/**
* Sets up a "mouseleave" listener—a listener that is called the first time
* the user's mouse leaves the specified element(s). By passing a CSS selector
* as the fourth argument, can also be used to delegate a "mouseleave"
* event listener.
*
* @event mouseleave
* @param type {string} "mouseleave"
* @param fn {string} The method the event invokes.
* @param el {string|node} The element(s) to assign the listener to.
* @param spec {string} Optional. String representing a selector that must
* match the target of the event in order for the listener to be called.
* @return {EventHandle} the detach handle
* @for YUI
*/
Y.Env.evt.plugins.mouseleave = eventConfig;