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define( [
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"./core",
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"./core/access",
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"./data/var/dataPriv",
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"./data/var/dataUser"
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], function( jQuery, access, dataPriv, dataUser ) {
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"use strict";
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// Implementation Summary
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//
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// 1. Enforce API surface and semantic compatibility with 1.9.x branch
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// 2. Improve the module's maintainability by reducing the storage
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// paths to a single mechanism.
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// 3. Use the same single mechanism to support "private" and "user" data.
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// 4. _Never_ expose "private" data to user code (TODO: Drop _data, _removeData)
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// 5. Avoid exposing implementation details on user objects (eg. expando properties)
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// 6. Provide a clear path for implementation upgrade to WeakMap in 2014
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var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
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rmultiDash = /[A-Z]/g;
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function getData( data ) {
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if ( data === "true" ) {
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return true;
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}
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if ( data === "false" ) {
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return false;
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}
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if ( data === "null" ) {
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return null;
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}
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// Only convert to a number if it doesn't change the string
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if ( data === +data + "" ) {
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return +data;
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}
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if ( rbrace.test( data ) ) {
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return JSON.parse( data );
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}
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return data;
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}
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function dataAttr( elem, key, data ) {
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var name;
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// If nothing was found internally, try to fetch any
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// data from the HTML5 data-* attribute
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if ( data === undefined && elem.nodeType === 1 ) {
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name = "data-" + key.replace( rmultiDash, "-$&" ).toLowerCase();
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data = elem.getAttribute( name );
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if ( typeof data === "string" ) {
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try {
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data = getData( data );
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} catch ( e ) {}
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// Make sure we set the data so it isn't changed later
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dataUser.set( elem, key, data );
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} else {
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data = undefined;
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}
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}
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return data;
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}
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jQuery.extend( {
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hasData: function( elem ) {
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return dataUser.hasData( elem ) || dataPriv.hasData( elem );
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},
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data: function( elem, name, data ) {
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return dataUser.access( elem, name, data );
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},
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removeData: function( elem, name ) {
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dataUser.remove( elem, name );
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},
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// TODO: Now that all calls to _data and _removeData have been replaced
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// with direct calls to dataPriv methods, these can be deprecated.
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_data: function( elem, name, data ) {
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return dataPriv.access( elem, name, data );
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},
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_removeData: function( elem, name ) {
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dataPriv.remove( elem, name );
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}
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} );
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jQuery.fn.extend( {
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data: function( key, value ) {
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var i, name, data,
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elem = this[ 0 ],
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attrs = elem && elem.attributes;
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// Gets all values
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if ( key === undefined ) {
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if ( this.length ) {
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data = dataUser.get( elem );
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if ( elem.nodeType === 1 && !dataPriv.get( elem, "hasDataAttrs" ) ) {
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i = attrs.length;
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while ( i-- ) {
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// Support: IE 11 only
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// The attrs elements can be null (#14894)
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if ( attrs[ i ] ) {
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name = attrs[ i ].name;
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if ( name.indexOf( "data-" ) === 0 ) {
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name = jQuery.camelCase( name.slice( 5 ) );
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dataAttr( elem, name, data[ name ] );
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}
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}
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}
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dataPriv.set( elem, "hasDataAttrs", true );
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}
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}
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return data;
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}
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// Sets multiple values
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if ( typeof key === "object" ) {
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return this.each( function() {
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dataUser.set( this, key );
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} );
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}
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return access( this, function( value ) {
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var data;
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// The calling jQuery object (element matches) is not empty
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// (and therefore has an element appears at this[ 0 ]) and the
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// `value` parameter was not undefined. An empty jQuery object
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// will result in `undefined` for elem = this[ 0 ] which will
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// throw an exception if an attempt to read a data cache is made.
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if ( elem && value === undefined ) {
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// Attempt to get data from the cache
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// The key will always be camelCased in Data
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data = dataUser.get( elem, key );
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if ( data !== undefined ) {
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return data;
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}
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// Attempt to "discover" the data in
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// HTML5 custom data-* attrs
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data = dataAttr( elem, key );
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if ( data !== undefined ) {
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return data;
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}
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// We tried really hard, but the data doesn't exist.
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return;
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}
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// Set the data...
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this.each( function() {
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// We always store the camelCased key
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dataUser.set( this, key, value );
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} );
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}, null, value, arguments.length > 1, null, true );
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},
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removeData: function( key ) {
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return this.each( function() {
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dataUser.remove( this, key );
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} );
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}
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} );
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return jQuery;
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} );
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