230 lines
5.2 KiB
JavaScript
230 lines
5.2 KiB
JavaScript
(function( jQuery ) {
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var windowData = {},
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rbrace = /^(?:\{.*\}|\[.*\])$/;
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jQuery.extend({
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cache: {},
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// Please use with caution
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uuid: 0,
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// Unique for each copy of jQuery on the page
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expando: "jQuery" + jQuery.now(),
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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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// Ban all objects except for Flash (which handle expandos)
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"object": "clsid:D27CDB6E-AE6D-11cf-96B8-444553540000",
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"applet": true
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},
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hasData: function( elem ) {
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return !elem.nodeType || (elem[ jQuery.expando ] && !jQuery.isEmptyObject(jQuery.cache[ elem[jQuery.expando] ]));
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},
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data: function( elem, name, data ) {
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if ( !jQuery.acceptData( elem ) ) {
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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 isNode = elem.nodeType,
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id = isNode ? elem[ jQuery.expando ] : null,
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cache = jQuery.cache, thisCache;
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if ( isNode && !id && typeof name === "string" && data === undefined ) {
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return;
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}
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// Get the data from the object directly
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if ( !isNode ) {
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cache = elem;
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// Compute a unique ID for the element
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} else if ( !id ) {
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elem[ jQuery.expando ] = id = ++jQuery.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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if ( isNode ) {
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cache[ id ] = jQuery.extend(cache[ id ], name);
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} else {
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jQuery.extend( cache, name );
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}
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} else if ( isNode && !cache[ id ] ) {
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cache[ id ] = {};
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}
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thisCache = isNode ? cache[ id ] : cache;
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// Prevent overriding the named cache with undefined values
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if ( data !== undefined ) {
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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 ( !jQuery.acceptData( elem ) ) {
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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 isNode = elem.nodeType,
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id = isNode ? elem[ jQuery.expando ] : elem,
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cache = jQuery.cache,
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thisCache = isNode ? cache[ id ] : 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 ( isNode && 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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if ( isNode && jQuery.support.deleteExpando ) {
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delete elem[ jQuery.expando ];
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} else if ( elem.removeAttribute ) {
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elem.removeAttribute( jQuery.expando );
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// Completely remove the data cache
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} else if ( isNode ) {
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delete cache[ id ];
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// Remove all fields from the object
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} else {
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for ( var n in elem ) {
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delete elem[ n ];
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}
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}
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}
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},
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// A method for determining if a DOM node can handle the data expando
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acceptData: function( elem ) {
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if ( elem.nodeName ) {
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var match = jQuery.noData[ elem.nodeName.toLowerCase() ];
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if ( match ) {
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return !(match === true || elem.getAttribute("classid") !== match);
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}
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}
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return true;
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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 data = null;
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if ( typeof key === "undefined" ) {
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if ( this.length ) {
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data = jQuery.data( this[0] );
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if ( this[0].nodeType === 1 ) {
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var attr = this[0].attributes, name;
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for ( var i = 0, l = attr.length; i < l; i++ ) {
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name = attr[i].name;
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if ( name.indexOf( "data-" ) === 0 ) {
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name = name.substr( 5 );
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dataAttr( this[0], name, data[ name ] );
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}
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}
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}
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}
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return data;
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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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data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
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// Try to fetch any internally stored data first
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if ( data === undefined && this.length ) {
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data = jQuery.data( this[0], key );
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data = dataAttr( this[0], key, data );
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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.each(function() {
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var $this = jQuery( this ),
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args = [ parts[0], value ];
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$this.triggerHandler( "setData" + parts[1] + "!", args );
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jQuery.data( this, key, value );
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$this.triggerHandler( "changeData" + parts[1] + "!", args );
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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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function dataAttr( elem, key, data ) {
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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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data = elem.getAttribute( "data-" + key );
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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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!jQuery.isNaN( data ) ? parseFloat( 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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jQuery.data( 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 );
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