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YUI.add('event-mouseenter', function (Y, NAME) {
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/**
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* <p>Adds subscription and delegation support for mouseenter and mouseleave
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* events. Unlike mouseover and mouseout, these events aren't fired from child
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* elements of a subscribed node.</p>
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*
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* <p>This avoids receiving three mouseover notifications from a setup like</p>
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*
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* <pre><code>div#container > p > a[href]</code></pre>
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*
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* <p>where</p>
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*
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* <pre><code>Y.one('#container').on('mouseover', callback)</code></pre>
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*
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* <p>When the mouse moves over the link, one mouseover event is fired from
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* #container, then when the mouse moves over the p, another mouseover event is
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* fired and bubbles to #container, causing a second notification, and finally
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* when the mouse moves over the link, a third mouseover event is fired and
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* bubbles to #container for a third notification.</p>
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*
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* <p>By contrast, using mouseenter instead of mouseover, the callback would be
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* executed only once when the mouse moves over #container.</p>
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*
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* @module event
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* @submodule event-mouseenter
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*/
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var domEventProxies = Y.Env.evt.dom_wrappers,
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contains = Y.DOM.contains,
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toArray = Y.Array,
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noop = function () {},
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config = {
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proxyType: "mouseover",
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relProperty: "fromElement",
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_notify: function (e, property, notifier) {
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var el = this._node,
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related = e.relatedTarget || e[property];
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if (el !== related && !contains(el, related)) {
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notifier.fire(new Y.DOMEventFacade(e, el,
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domEventProxies['event:' + Y.stamp(el) + e.type]));
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}
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},
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on: function (node, sub, notifier) {
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var el = Y.Node.getDOMNode(node),
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args = [
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this.proxyType,
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this._notify,
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el,
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null,
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this.relProperty,
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notifier];
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sub.handle = Y.Event._attach(args, { facade: false });
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// node.on(this.proxyType, notify, null, notifier);
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},
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detach: function (node, sub) {
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sub.handle.detach();
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},
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delegate: function (node, sub, notifier, filter) {
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var el = Y.Node.getDOMNode(node),
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args = [
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this.proxyType,
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noop,
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el,
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null,
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notifier
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];
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sub.handle = Y.Event._attach(args, { facade: false });
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sub.handle.sub.filter = filter;
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sub.handle.sub.relProperty = this.relProperty;
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sub.handle.sub._notify = this._filterNotify;
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},
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_filterNotify: function (thisObj, args, ce) {
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args = args.slice();
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if (this.args) {
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args.push.apply(args, this.args);
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}
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var currentTarget = Y.delegate._applyFilter(this.filter, args, ce),
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related = args[0].relatedTarget || args[0][this.relProperty],
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e, i, len, ret, ct;
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if (currentTarget) {
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currentTarget = toArray(currentTarget);
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for (i = 0, len = currentTarget.length && (!e || !e.stopped); i < len; ++i) {
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ct = currentTarget[0];
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if (!contains(ct, related)) {
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if (!e) {
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e = new Y.DOMEventFacade(args[0], ct, ce);
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e.container = Y.one(ce.el);
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}
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e.currentTarget = Y.one(ct);
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// TODO: where is notifier? args? this.notifier?
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ret = args[1].fire(e);
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if (ret === false) {
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break;
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}
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}
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}
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}
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return ret;
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},
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detachDelegate: function (node, sub) {
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sub.handle.detach();
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}
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};
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Y.Event.define("mouseenter", config, true);
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Y.Event.define("mouseleave", Y.merge(config, {
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proxyType: "mouseout",
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relProperty: "toElement"
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}), true);
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}, '3.18.1', {"requires": ["event-synthetic"]});
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