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1define( [
2 "./core",
3 "./core/access",
4 "./core/camelCase",
5 "./data/var/dataPriv",
6 "./data/var/dataUser"
7], function( jQuery, access, camelCase, dataPriv, dataUser ) {
8
9"use strict";
10
11// Implementation Summary
12//
13// 1. Enforce API surface and semantic compatibility with 1.9.x branch
14// 2. Improve the module's maintainability by reducing the storage
15// paths to a single mechanism.
16// 3. Use the same single mechanism to support "private" and "user" data.
17// 4. _Never_ expose "private" data to user code (TODO: Drop _data, _removeData)
18// 5. Avoid exposing implementation details on user objects (eg. expando properties)
19// 6. Provide a clear path for implementation upgrade to WeakMap in 2014
20
21var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
22 rmultiDash = /[A-Z]/g;
23
24function getData( data ) {
25 if ( data === "true" ) {
26 return true;
27 }
28
29 if ( data === "false" ) {
30 return false;
31 }
32
33 if ( data === "null" ) {
34 return null;
35 }
36
37 // Only convert to a number if it doesn't change the string
38 if ( data === +data + "" ) {
39 return +data;
40 }
41
42 if ( rbrace.test( data ) ) {
43 return JSON.parse( data );
44 }
45
46 return data;
47}
48
49function dataAttr( elem, key, data ) {
50 var name;
51
52 // If nothing was found internally, try to fetch any
53 // data from the HTML5 data-* attribute
54 if ( data === undefined && elem.nodeType === 1 ) {
55 name = "data-" + key.replace( rmultiDash, "-$&" ).toLowerCase();
56 data = elem.getAttribute( name );
57
58 if ( typeof data === "string" ) {
59 try {
60 data = getData( data );
61 } catch ( e ) {}
62
63 // Make sure we set the data so it isn't changed later
64 dataUser.set( elem, key, data );
65 } else {
66 data = undefined;
67 }
68 }
69 return data;
70}
71
72jQuery.extend( {
73 hasData: function( elem ) {
74 return dataUser.hasData( elem ) || dataPriv.hasData( elem );
75 },
76
77 data: function( elem, name, data ) {
78 return dataUser.access( elem, name, data );
79 },
80
81 removeData: function( elem, name ) {
82 dataUser.remove( elem, name );
83 },
84
85 // TODO: Now that all calls to _data and _removeData have been replaced
86 // with direct calls to dataPriv methods, these can be deprecated.
87 _data: function( elem, name, data ) {
88 return dataPriv.access( elem, name, data );
89 },
90
91 _removeData: function( elem, name ) {
92 dataPriv.remove( elem, name );
93 }
94} );
95
96jQuery.fn.extend( {
97 data: function( key, value ) {
98 var i, name, data,
99 elem = this[ 0 ],
100 attrs = elem && elem.attributes;
101
102 // Gets all values
103 if ( key === undefined ) {
104 if ( this.length ) {
105 data = dataUser.get( elem );
106
107 if ( elem.nodeType === 1 && !dataPriv.get( elem, "hasDataAttrs" ) ) {
108 i = attrs.length;
109 while ( i-- ) {
110
111 // Support: IE 11 only
112 // The attrs elements can be null (trac-14894)
113 if ( attrs[ i ] ) {
114 name = attrs[ i ].name;
115 if ( name.indexOf( "data-" ) === 0 ) {
116 name = camelCase( name.slice( 5 ) );
117 dataAttr( elem, name, data[ name ] );
118 }
119 }
120 }
121 dataPriv.set( elem, "hasDataAttrs", true );
122 }
123 }
124
125 return data;
126 }
127
128 // Sets multiple values
129 if ( typeof key === "object" ) {
130 return this.each( function() {
131 dataUser.set( this, key );
132 } );
133 }
134
135 return access( this, function( value ) {
136 var data;
137
138 // The calling jQuery object (element matches) is not empty
139 // (and therefore has an element appears at this[ 0 ]) and the
140 // `value` parameter was not undefined. An empty jQuery object
141 // will result in `undefined` for elem = this[ 0 ] which will
142 // throw an exception if an attempt to read a data cache is made.
143 if ( elem && value === undefined ) {
144
145 // Attempt to get data from the cache
146 // The key will always be camelCased in Data
147 data = dataUser.get( elem, key );
148 if ( data !== undefined ) {
149 return data;
150 }
151
152 // Attempt to "discover" the data in
153 // HTML5 custom data-* attrs
154 data = dataAttr( elem, key );
155 if ( data !== undefined ) {
156 return data;
157 }
158
159 // We tried really hard, but the data doesn't exist.
160 return;
161 }
162
163 // Set the data...
164 this.each( function() {
165
166 // We always store the camelCased key
167 dataUser.set( this, key, value );
168 } );
169 }, null, value, arguments.length > 1, null, true );
170 },
171
172 removeData: function( key ) {
173 return this.each( function() {
174 dataUser.remove( this, key );
175 } );
176 }
177} );
178
179return jQuery;
180} );