RSVP and Event Management / 1.2.0

RSVP and Event Management v1.2.0

rsvp / jquery-validate / lib / jquery.metadata.js

jquery.metadata.js in RSVP and Event Management 1.2.0, at jquery-validate/lib/jquery.metadata.js

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1	/*
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);