138 lines
3.1 KiB
JavaScript
138 lines
3.1 KiB
JavaScript
var expando = "jQuery" + now(), uuid = 0, windowData = {};
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var emptyObject = {};
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jQuery.extend({
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cache: {},
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expando:expando,
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// The following elements throw uncatchable exceptions if you
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// attempt to add expando properties to them.
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noData: {
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"embed": true,
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"object": true,
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"applet": true
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},
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data: function( elem, name, data ) {
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if ( elem.nodeName && jQuery.noData[elem.nodeName.toLowerCase()] ) {
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return;
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}
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elem = elem == window ?
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windowData :
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elem;
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var id = elem[ expando ], cache = jQuery.cache, thisCache;
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// Handle the case where there's no name immediately
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if ( !name && !id ) {
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return null;
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}
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// Compute a unique ID for the element
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if ( !id ) {
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id = ++uuid;
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}
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// Avoid generating a new cache unless none exists and we
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// want to manipulate it.
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if ( typeof name === "object" ) {
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elem[ expando ] = id;
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thisCache = cache[ id ] = jQuery.extend(true, {}, name);
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} else if ( cache[ id ] ) {
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thisCache = cache[ id ];
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} else if ( typeof data === "undefined" ) {
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thisCache = emptyObject;
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} else {
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thisCache = cache[ id ] = {};
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}
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// Prevent overriding the named cache with undefined values
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if ( data !== undefined ) {
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elem[ expando ] = id;
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thisCache[ name ] = data;
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}
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return typeof name === "string" ? thisCache[ name ] : thisCache;
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},
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removeData: function( elem, name ) {
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if ( elem.nodeName && jQuery.noData[elem.nodeName.toLowerCase()] ) {
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return;
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}
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elem = elem == window ?
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windowData :
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elem;
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var id = elem[ expando ], cache = jQuery.cache, thisCache = cache[ id ];
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// If we want to remove a specific section of the element's data
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if ( name ) {
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if ( thisCache ) {
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// Remove the section of cache data
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delete thisCache[ name ];
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// If we've removed all the data, remove the element's cache
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if ( jQuery.isEmptyObject(thisCache) ) {
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jQuery.removeData( elem );
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}
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}
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// Otherwise, we want to remove all of the element's data
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} else {
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// Clean up the element expando
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try {
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delete elem[ expando ];
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} catch( e ) {
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// IE has trouble directly removing the expando
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// but it's ok with using removeAttribute
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if ( elem.removeAttribute ) {
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elem.removeAttribute( expando );
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}
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}
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// Completely remove the data cache
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delete cache[ id ];
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}
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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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if ( typeof key === "undefined" && this.length ) {
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return jQuery.data( this[0] );
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} else if ( typeof key === "object" ) {
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return this.each(function() {
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jQuery.data( this, key );
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});
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}
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var parts = key.split(".");
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parts[1] = parts[1] ? "." + parts[1] : "";
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if ( value === undefined ) {
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var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
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if ( data === undefined && this.length ) {
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data = jQuery.data( this[0], key );
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}
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return data === undefined && parts[1] ?
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this.data( parts[0] ) :
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data;
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} else {
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return this.trigger("setData" + parts[1] + "!", [parts[0], value]).each(function(){
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jQuery.data( this, key, value );
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});
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}
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},
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removeData: function( key ){
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return this.each(function(){
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jQuery.removeData( this, key );
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});
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}
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});
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