root / htmltest / sites / all / modules / jquery_update / replace / ui / external / jquery.metadata.js @ dc45a079
1 | 85ad3d82 | Assos Assos | /*
|
---|---|---|---|
2 | * Metadata - jQuery plugin for parsing metadata from elements
|
||
3 | *
|
||
4 | * Copyright (c) 2006 John Resig, Yehuda Katz, J�örn Zaefferer, Paul McLanahan
|
||
5 | *
|
||
6 | * Dual licensed under the MIT and GPL licenses:
|
||
7 | * http://www.opensource.org/licenses/mit-license.php
|
||
8 | * http://www.gnu.org/licenses/gpl.html
|
||
9 | *
|
||
10 | * Revision: $Id: jquery.metadata.js 4187 2007-12-16 17:15:27Z joern.zaefferer $
|
||
11 | *
|
||
12 | */
|
||
13 | |||
14 | /**
|
||
15 | * Sets the type of metadata to use. Metadata is encoded in JSON, and each property
|
||
16 | * in the JSON will become a property of the element itself.
|
||
17 | *
|
||
18 | * There are three supported types of metadata storage:
|
||
19 | *
|
||
20 | * attr: Inside an attribute. The name parameter indicates *which* attribute.
|
||
21 | *
|
||
22 | * class: Inside the class attribute, wrapped in curly braces: { }
|
||
23 | *
|
||
24 | * elem: Inside a child element (e.g. a script tag). The
|
||
25 | * name parameter indicates *which* element.
|
||
26 | *
|
||
27 | * The metadata for an element is loaded the first time the element is accessed via jQuery.
|
||
28 | *
|
||
29 | * As a result, you can define the metadata type, use $(expr) to load the metadata into the elements
|
||
30 | * matched by expr, then redefine the metadata type and run another $(expr) for other elements.
|
||
31 | *
|
||
32 | * @name $.metadata.setType
|
||
33 | *
|
||
34 | * @example <p id="one" class="some_class {item_id: 1, item_label: 'Label'}">This is a p</p>
|
||
35 | * @before $.metadata.setType("class")
|
||
36 | * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
|
||
37 | * @desc Reads metadata from the class attribute
|
||
38 | *
|
||
39 | * @example <p id="one" class="some_class" data="{item_id: 1, item_label: 'Label'}">This is a p</p>
|
||
40 | * @before $.metadata.setType("attr", "data")
|
||
41 | * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
|
||
42 | * @desc Reads metadata from a "data" attribute
|
||
43 | *
|
||
44 | * @example <p id="one" class="some_class"><script>{item_id: 1, item_label: 'Label'}</script>This is a p</p>
|
||
45 | * @before $.metadata.setType("elem", "script")
|
||
46 | * @after $("#one").metadata().item_id == 1; $("#one").metadata().item_label == "Label"
|
||
47 | * @desc Reads metadata from a nested script element
|
||
48 | *
|
||
49 | * @param String type The encoding type
|
||
50 | * @param String name The name of the attribute to be used to get metadata (optional)
|
||
51 | * @cat Plugins/Metadata
|
||
52 | * @descr Sets the type of encoding to be used when loading metadata for the first time
|
||
53 | * @type undefined
|
||
54 | * @see metadata()
|
||
55 | */
|
||
56 | |||
57 | (function($) { |
||
58 | |||
59 | $.extend({
|
||
60 | metadata : {
|
||
61 | defaults : {
|
||
62 | type: 'class', |
||
63 | name: 'metadata', |
||
64 | cre: /({.*})/, |
||
65 | single: 'metadata' |
||
66 | }, |
||
67 | setType: function( type, name ){ |
||
68 | this.defaults.type = type;
|
||
69 | this.defaults.name = name;
|
||
70 | }, |
||
71 | get: function( elem, opts ){ |
||
72 | var settings = $.extend({},this.defaults,opts); |
||
73 | // check for empty string in single property
|
||
74 | if ( !settings.single.length ) settings.single = 'metadata'; |
||
75 | |||
76 | var data = $.data(elem, settings.single); |
||
77 | // returned cached data if it already exists
|
||
78 | if ( data ) return data; |
||
79 | |||
80 | data = "{}";
|
||
81 | |||
82 | if ( settings.type == "class" ) { |
||
83 | var m = settings.cre.exec( elem.className );
|
||
84 | if ( m )
|
||
85 | data = m[1];
|
||
86 | } else if ( settings.type == "elem" ) { |
||
87 | if( !elem.getElementsByTagName )
|
||
88 | return undefined; |
||
89 | var e = elem.getElementsByTagName(settings.name);
|
||
90 | if ( e.length )
|
||
91 | data = $.trim(e[0].innerHTML); |
||
92 | } else if ( elem.getAttribute != undefined ) { |
||
93 | var attr = elem.getAttribute( settings.name );
|
||
94 | if ( attr )
|
||
95 | data = attr; |
||
96 | } |
||
97 | |||
98 | if ( data.indexOf( '{' ) <0 ) |
||
99 | data = "{" + data + "}"; |
||
100 | |||
101 | data = eval("(" + data + ")"); |
||
102 | |||
103 | $.data( elem, settings.single, data );
|
||
104 | return data;
|
||
105 | } |
||
106 | } |
||
107 | }); |
||
108 | |||
109 | /**
|
||
110 | * Returns the metadata object for the first member of the jQuery object.
|
||
111 | *
|
||
112 | * @name metadata
|
||
113 | * @descr Returns element's metadata object
|
||
114 | * @param Object opts An object contianing settings to override the defaults
|
||
115 | * @type jQuery
|
||
116 | * @cat Plugins/Metadata
|
||
117 | */
|
||
118 | $.fn.metadata = function( opts ){ |
||
119 | return $.metadata.get( this[0], opts ); |
||
120 | }; |
||
121 | |||
122 | })(jQuery); |