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/* YUI 3.17.2 (build 9c3c78e) Copyright 2014 Yahoo! Inc. All rights reserved. Licensed under the BSD License. http://yuilibrary.com/license/ */ YUI.add('node-event-delegate', function (Y, NAME) { /** * Functionality to make the node a delegated event container * @module node * @submodule node-event-delegate */ /** * <p>Sets up a delegation listener for an event occurring inside the Node. * The delegated event will be verified against a supplied selector or * filtering function to test if the event references at least one node that * should trigger the subscription callback.</p> * * <p>Selector string filters will trigger the callback if the event originated * from a node that matches it or is contained in a node that matches it. * Function filters are called for each Node up the parent axis to the * subscribing container node, and receive at each level the Node and the event * object. The function should return true (or a truthy value) if that Node * should trigger the subscription callback. Note, it is possible for filters * to match multiple Nodes for a single event. In this case, the delegate * callback will be executed for each matching Node.</p> * * <p>For each matching Node, the callback will be executed with its 'this' * object set to the Node matched by the filter (unless a specific context was * provided during subscription), and the provided event's * <code>currentTarget</code> will also be set to the matching Node. The * containing Node from which the subscription was originally made can be * referenced as <code>e.container</code>. * * @method delegate * @param type {String} the event type to delegate * @param fn {Function} the callback function to execute. This function * will be provided the event object for the delegated event. * @param spec {String|Function} a selector that must match the target of the * event or a function to test target and its parents for a match * @param context {Object} optional argument that specifies what 'this' refers to. * @param args* {any} 0..n additional arguments to pass on to the callback function. * These arguments will be added after the event object. * @return {EventHandle} the detach handle * @for Node */ Y.Node.prototype.delegate = function(type) { var args = Y.Array(arguments, 0, true), index = (Y.Lang.isObject(type) && !Y.Lang.isArray(type)) ? 1 : 2; args.splice(index, 0, this._node); return Y.delegate.apply(Y, args); }; }, '3.17.2', {"requires": ["node-base", "event-delegate"]});