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179 lines
4.8 KiB
179 lines
4.8 KiB
define([ |
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"./core", |
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"./var/rnotwhite", |
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"./core/access", |
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"./data/var/data_priv", |
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"./data/var/data_user" |
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], function( jQuery, rnotwhite, access, data_priv, data_user ) { |
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/* |
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Implementation Summary |
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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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*/ |
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var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/, |
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rmultiDash = /([A-Z])/g; |
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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, "-$1" ).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 = data === "true" ? true : |
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data === "false" ? false : |
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data === "null" ? null : |
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// Only convert to a number if it doesn't change the string |
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+data + "" === data ? +data : |
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rbrace.test( data ) ? jQuery.parseJSON( data ) : |
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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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data_user.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 data_user.hasData( elem ) || data_priv.hasData( elem ); |
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}, |
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data: function( elem, name, data ) { |
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return data_user.access( elem, name, data ); |
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}, |
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removeData: function( elem, name ) { |
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data_user.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 data_priv methods, these can be deprecated. |
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_data: function( elem, name, data ) { |
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return data_priv.access( elem, name, data ); |
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}, |
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_removeData: function( elem, name ) { |
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data_priv.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 = data_user.get( elem ); |
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if ( elem.nodeType === 1 && !data_priv.get( elem, "hasDataAttrs" ) ) { |
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i = attrs.length; |
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while ( i-- ) { |
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// Support: IE11+ |
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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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data_priv.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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data_user.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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camelKey = jQuery.camelCase( key ); |
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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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// with the key as-is |
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data = data_user.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 get data from the cache |
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// with the key camelized |
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data = data_user.get( elem, camelKey ); |
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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, camelKey, undefined ); |
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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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// First, attempt to store a copy or reference of any |
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// data that might've been store with a camelCased key. |
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var data = data_user.get( this, camelKey ); |
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// For HTML5 data-* attribute interop, we have to |
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// store property names with dashes in a camelCase form. |
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// This might not apply to all properties...* |
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data_user.set( this, camelKey, value ); |
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// *... In the case of properties that might _actually_ |
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// have dashes, we need to also store a copy of that |
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// unchanged property. |
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if ( key.indexOf("-") !== -1 && data !== undefined ) { |
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data_user.set( this, key, value ); |
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} |
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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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data_user.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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