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YUI.add('view-node-map', function (Y, NAME) {
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/**
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View extension that adds a static `getByNode()` method that returns the nearest
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View instance associated with the given Node (similar to Widget's `getByNode()`
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method).
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@module app
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@submodule view-node-map
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@since 3.5.0
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**/
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var buildCfg = Y.namespace('View._buildCfg'),
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instances = {};
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/**
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View extension that adds a static `getByNode()` method that returns the nearest
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View instance associated with the given Node (similar to Widget's `getByNode()`
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method).
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Note that it's important to call `destroy()` on a View instance using this
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extension when you plan to stop using it. This ensures that all internal
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references to that View are cleared to prevent memory leaks.
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@class View.NodeMap
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@extensionfor View
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@since 3.5.0
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**/
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function NodeMap() {}
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// Tells Base.create() to mix the static getByNode method into built classes.
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// We're cheating and modifying Y.View here, because right now there's no better
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// way to do it.
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buildCfg.aggregates || (buildCfg.aggregates = []);
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buildCfg.aggregates.push('getByNode');
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/**
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Returns the nearest View instance associated with the given Node. The Node may
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be a View container or any child of a View container.
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Note that only instances of Views that have the Y.View.NodeMap extension mixed
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in will be returned. The base View class doesn't provide this functionality by
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default due to the additional memory management overhead involved in maintaining
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a mapping of Nodes to View instances.
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@method getByNode
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@param {Node|HTMLElement|String} node Node instance, selector string, or
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HTMLElement.
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@return {View} Closest View instance associated with the given Node, or `null`
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if no associated View instance was found.
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@static
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@since 3.5.0
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**/
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NodeMap.getByNode = function (node) {
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var view;
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Y.one(node).ancestor(function (ancestor) {
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return (view = instances[Y.stamp(ancestor, true)]) || false;
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}, true);
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return view || null;
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};
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// To make this testable.
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NodeMap._instances = instances;
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NodeMap.prototype = {
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initializer: function () {
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instances[Y.stamp(this.get('container'))] = this;
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},
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destructor: function () {
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var stamp = Y.stamp(this.get('container'), true);
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if (stamp in instances) {
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delete instances[stamp];
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}
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}
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};
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Y.View.NodeMap = NodeMap;
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}, '3.18.1', {"requires": ["view"]});
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