1 |
efrain |
1 |
YUI.add('view-node-map', function (Y, NAME) {
|
|
|
2 |
|
|
|
3 |
/**
|
|
|
4 |
View extension that adds a static `getByNode()` method that returns the nearest
|
|
|
5 |
View instance associated with the given Node (similar to Widget's `getByNode()`
|
|
|
6 |
method).
|
|
|
7 |
|
|
|
8 |
@module app
|
|
|
9 |
@submodule view-node-map
|
|
|
10 |
@since 3.5.0
|
|
|
11 |
**/
|
|
|
12 |
|
|
|
13 |
var buildCfg = Y.namespace('View._buildCfg'),
|
|
|
14 |
instances = {};
|
|
|
15 |
|
|
|
16 |
/**
|
|
|
17 |
View extension that adds a static `getByNode()` method that returns the nearest
|
|
|
18 |
View instance associated with the given Node (similar to Widget's `getByNode()`
|
|
|
19 |
method).
|
|
|
20 |
|
|
|
21 |
Note that it's important to call `destroy()` on a View instance using this
|
|
|
22 |
extension when you plan to stop using it. This ensures that all internal
|
|
|
23 |
references to that View are cleared to prevent memory leaks.
|
|
|
24 |
|
|
|
25 |
@class View.NodeMap
|
|
|
26 |
@extensionfor View
|
|
|
27 |
@since 3.5.0
|
|
|
28 |
**/
|
|
|
29 |
function NodeMap() {}
|
|
|
30 |
|
|
|
31 |
// Tells Base.create() to mix the static getByNode method into built classes.
|
|
|
32 |
// We're cheating and modifying Y.View here, because right now there's no better
|
|
|
33 |
// way to do it.
|
|
|
34 |
buildCfg.aggregates || (buildCfg.aggregates = []);
|
|
|
35 |
buildCfg.aggregates.push('getByNode');
|
|
|
36 |
|
|
|
37 |
/**
|
|
|
38 |
Returns the nearest View instance associated with the given Node. The Node may
|
|
|
39 |
be a View container or any child of a View container.
|
|
|
40 |
|
|
|
41 |
Note that only instances of Views that have the Y.View.NodeMap extension mixed
|
|
|
42 |
in will be returned. The base View class doesn't provide this functionality by
|
|
|
43 |
default due to the additional memory management overhead involved in maintaining
|
|
|
44 |
a mapping of Nodes to View instances.
|
|
|
45 |
|
|
|
46 |
@method getByNode
|
|
|
47 |
@param {Node|HTMLElement|String} node Node instance, selector string, or
|
|
|
48 |
HTMLElement.
|
|
|
49 |
@return {View} Closest View instance associated with the given Node, or `null`
|
|
|
50 |
if no associated View instance was found.
|
|
|
51 |
@static
|
|
|
52 |
@since 3.5.0
|
|
|
53 |
**/
|
|
|
54 |
NodeMap.getByNode = function (node) {
|
|
|
55 |
var view;
|
|
|
56 |
|
|
|
57 |
Y.one(node).ancestor(function (ancestor) {
|
|
|
58 |
return (view = instances[Y.stamp(ancestor, true)]) || false;
|
|
|
59 |
}, true);
|
|
|
60 |
|
|
|
61 |
return view || null;
|
|
|
62 |
};
|
|
|
63 |
|
|
|
64 |
// To make this testable.
|
|
|
65 |
NodeMap._instances = instances;
|
|
|
66 |
|
|
|
67 |
NodeMap.prototype = {
|
|
|
68 |
initializer: function () {
|
|
|
69 |
instances[Y.stamp(this.get('container'))] = this;
|
|
|
70 |
},
|
|
|
71 |
|
|
|
72 |
destructor: function () {
|
|
|
73 |
var stamp = Y.stamp(this.get('container'), true);
|
|
|
74 |
|
|
|
75 |
if (stamp in instances) {
|
|
|
76 |
delete instances[stamp];
|
|
|
77 |
}
|
|
|
78 |
}
|
|
|
79 |
};
|
|
|
80 |
|
|
|
81 |
Y.View.NodeMap = NodeMap;
|
|
|
82 |
|
|
|
83 |
|
|
|
84 |
}, '3.18.1', {"requires": ["view"]});
|