-var expando = "jQuery" + now(), uuid = 0, windowData = {};
+(function( jQuery ) {
+
+var rbrace = /^(?:\{.*\}|\[.*\])$/;
jQuery.extend({
cache: {},
-
- expando:expando,
+
+ // Please use with caution
+ uuid: 0,
+
+ // Unique for each copy of jQuery on the page
+ // Non-digits removed to match rinlinejQuery
+ expando: "jQuery" + ( jQuery.fn.jquery + Math.random() ).replace( /\D/g, "" ),
// The following elements throw uncatchable exceptions if you
// attempt to add expando properties to them.
noData: {
"embed": true,
- "object": true,
+ // Ban all objects except for Flash (which handle expandos)
+ "object": "clsid:D27CDB6E-AE6D-11cf-96B8-444553540000",
"applet": true
},
- data: function( elem, name, data ) {
- if ( elem.nodeName && jQuery.noData[elem.nodeName.toLowerCase()] ) {
+ hasData: function( elem ) {
+ elem = elem.nodeType ? jQuery.cache[ elem[jQuery.expando] ] : elem[ jQuery.expando ];
+
+ return !!elem && !jQuery.isEmptyObject(elem);
+ },
+
+ data: function( elem, name, data, pvt /* Internal Use Only */ ) {
+ if ( !jQuery.acceptData( elem ) ) {
return;
}
- elem = elem == window ?
- windowData :
- elem;
+ var internalKey = jQuery.expando, getByName = typeof name === "string", thisCache,
+
+ // We have to handle DOM nodes and JS objects differently because IE6-7
+ // can't GC object references properly across the DOM-JS boundary
+ isNode = elem.nodeType,
- var id = elem[ expando ], cache = jQuery.cache, thisCache;
+ // Only DOM nodes need the global jQuery cache; JS object data is
+ // attached directly to the object so GC can occur automatically
+ cache = isNode ? jQuery.cache : elem,
- if ( !id && typeof name === "string" && data === undefined ) {
- return null;
+ // Only defining an ID for JS objects if its cache already exists allows
+ // the code to shortcut on the same path as a DOM node with no cache
+ id = isNode ? elem[ jQuery.expando ] : elem[ jQuery.expando ] && jQuery.expando;
+
+ // Avoid doing any more work than we need to when trying to get data on an
+ // object that has no data at all
+ if ( (!id || (pvt && id && !cache[ id ][ internalKey ])) && getByName && data === undefined ) {
+ return;
}
- // Compute a unique ID for the element
- if ( !id ) {
- id = ++uuid;
+ if ( !id ) {
+ // Only DOM nodes need a new unique ID for each element since their data
+ // ends up in the global cache
+ if ( isNode ) {
+ elem[ jQuery.expando ] = id = ++jQuery.uuid;
+ } else {
+ id = jQuery.expando;
+ }
}
- // Avoid generating a new cache unless none exists and we
- // want to manipulate it.
- if ( typeof name === "object" ) {
- elem[ expando ] = id;
- thisCache = cache[ id ] = jQuery.extend(true, {}, name);
+ if ( !cache[ id ] ) {
+ // Use a Function as the cache object instead of an Object on JS objects
+ // as a hack to prevent JSON.stringify from serializing it (#8108)
+ cache[ id ] = isNode ? {} : function () {};
+ }
- } else if ( !cache[ id ] ) {
- elem[ expando ] = id;
- cache[ id ] = {};
+ // An object can be passed to jQuery.data instead of a key/value pair; this gets
+ // shallow copied over onto the existing cache
+ if ( typeof name === "object" || typeof name === "function" ) {
+ if ( pvt ) {
+ cache[ id ][ internalKey ] = jQuery.extend(cache[ id ][ internalKey ], name);
+ } else {
+ cache[ id ] = jQuery.extend(cache[ id ], name);
+ }
}
thisCache = cache[ id ];
- // Prevent overriding the named cache with undefined values
+ // Internal jQuery data is stored in a separate object inside the object's data
+ // cache in order to avoid key collisions between internal data and user-defined
+ // data
+ if ( pvt ) {
+ if ( !thisCache[ internalKey ] ) {
+ thisCache[ internalKey ] = {};
+ }
+
+ thisCache = thisCache[ internalKey ];
+ }
+
if ( data !== undefined ) {
thisCache[ name ] = data;
}
- return typeof name === "string" ? thisCache[ name ] : thisCache;
+ // TODO: This is a hack for 1.5 ONLY. It will be removed in 1.6. Users should
+ // not attempt to inspect the internal events object using jQuery.data, as this
+ // internal data object is undocumented and subject to change.
+ if ( name === "events" && !thisCache[name] ) {
+ return thisCache[ internalKey ] && thisCache[ internalKey ].events;
+ }
+
+ return getByName ? thisCache[ name ] : thisCache;
},
- removeData: function( elem, name ) {
- if ( elem.nodeName && jQuery.noData[elem.nodeName.toLowerCase()] ) {
+ removeData: function( elem, name, pvt /* Internal Use Only */ ) {
+ if ( !jQuery.acceptData( elem ) ) {
return;
}
- elem = elem == window ?
- windowData :
- elem;
+ var internalKey = jQuery.expando, isNode = elem.nodeType,
+
+ // See jQuery.data for more information
+ cache = isNode ? jQuery.cache : elem,
+
+ // See jQuery.data for more information
+ id = isNode ? elem[ jQuery.expando ] : jQuery.expando;
- var id = elem[ expando ], cache = jQuery.cache, thisCache = cache[ id ];
+ // If there is already no cache entry for this object, there is no
+ // purpose in continuing
+ if ( !cache[ id ] ) {
+ return;
+ }
- // If we want to remove a specific section of the element's data
if ( name ) {
+ var thisCache = pvt ? cache[ id ][ internalKey ] : cache[ id ];
+
if ( thisCache ) {
- // Remove the section of cache data
delete thisCache[ name ];
- // If we've removed all the data, remove the element's cache
- if ( jQuery.isEmptyObject(thisCache) ) {
- jQuery.removeData( elem );
+ // If there is no data left in the cache, we want to continue
+ // and let the cache object itself get destroyed
+ if ( !jQuery.isEmptyObject(thisCache) ) {
+ return;
}
}
+ }
- // Otherwise, we want to remove all of the element's data
- } else {
- // Clean up the element expando
- try {
- delete elem[ expando ];
- } catch( e ) {
- // IE has trouble directly removing the expando
- // but it's ok with using removeAttribute
- if ( elem.removeAttribute ) {
- elem.removeAttribute( expando );
- }
+ // See jQuery.data for more information
+ if ( pvt ) {
+ delete cache[ id ][ internalKey ];
+
+ // Don't destroy the parent cache unless the internal data object
+ // had been the only thing left in it
+ if ( !jQuery.isEmptyObject(cache[ id ]) ) {
+ return;
}
+ }
+
+ var internalCache = cache[ id ][ internalKey ];
- // Completely remove the data cache
+ // Browsers that fail expando deletion also refuse to delete expandos on
+ // the window, but it will allow it on all other JS objects; other browsers
+ // don't care
+ if ( jQuery.support.deleteExpando || cache != window ) {
delete cache[ id ];
+ } else {
+ cache[ id ] = null;
}
+
+ // We destroyed the entire user cache at once because it's faster than
+ // iterating through each key, but we need to continue to persist internal
+ // data if it existed
+ if ( internalCache ) {
+ cache[ id ] = {};
+ cache[ id ][ internalKey ] = internalCache;
+
+ // Otherwise, we need to eliminate the expando on the node to avoid
+ // false lookups in the cache for entries that no longer exist
+ } else if ( isNode ) {
+ // IE does not allow us to delete expando properties from nodes,
+ // nor does it have a removeAttribute function on Document nodes;
+ // we must handle all of these cases
+ if ( jQuery.support.deleteExpando ) {
+ delete elem[ jQuery.expando ];
+ } else if ( elem.removeAttribute ) {
+ elem.removeAttribute( jQuery.expando );
+ } else {
+ elem[ jQuery.expando ] = null;
+ }
+ }
+ },
+
+ // For internal use only.
+ _data: function( elem, name, data ) {
+ return jQuery.data( elem, name, data, true );
+ },
+
+ // A method for determining if a DOM node can handle the data expando
+ acceptData: function( elem ) {
+ if ( elem.nodeName ) {
+ var match = jQuery.noData[ elem.nodeName.toLowerCase() ];
+
+ if ( match ) {
+ return !(match === true || elem.getAttribute("classid") !== match);
+ }
+ }
+
+ return true;
}
});
jQuery.fn.extend({
data: function( key, value ) {
- if ( typeof key === "undefined" && this.length ) {
- return jQuery.data( this[0] );
+ var data = null;
+
+ if ( typeof key === "undefined" ) {
+ if ( this.length ) {
+ data = jQuery.data( this[0] );
+
+ if ( this[0].nodeType === 1 ) {
+ var attr = this[0].attributes, name;
+ for ( var i = 0, l = attr.length; i < l; i++ ) {
+ name = attr[i].name;
+
+ if ( name.indexOf( "data-" ) === 0 ) {
+ name = name.substr( 5 );
+ dataAttr( this[0], name, data[ name ] );
+ }
+ }
+ }
+ }
+
+ return data;
} else if ( typeof key === "object" ) {
return this.each(function() {
parts[1] = parts[1] ? "." + parts[1] : "";
if ( value === undefined ) {
- var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
+ data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
+ // Try to fetch any internally stored data first
if ( data === undefined && this.length ) {
data = jQuery.data( this[0], key );
+ data = dataAttr( this[0], key, data );
}
+
return data === undefined && parts[1] ?
this.data( parts[0] ) :
data;
+
} else {
- return this.trigger("setData" + parts[1] + "!", [parts[0], value]).each(function() {
+ return this.each(function() {
+ var $this = jQuery( this ),
+ args = [ parts[0], value ];
+
+ $this.triggerHandler( "setData" + parts[1] + "!", args );
jQuery.data( this, key, value );
+ $this.triggerHandler( "changeData" + parts[1] + "!", args );
});
}
},
});
}
});
+
+function dataAttr( elem, key, data ) {
+ // If nothing was found internally, try to fetch any
+ // data from the HTML5 data-* attribute
+ if ( data === undefined && elem.nodeType === 1 ) {
+ data = elem.getAttribute( "data-" + key );
+
+ if ( typeof data === "string" ) {
+ try {
+ data = data === "true" ? true :
+ data === "false" ? false :
+ data === "null" ? null :
+ !jQuery.isNaN( data ) ? parseFloat( data ) :
+ rbrace.test( data ) ? jQuery.parseJSON( data ) :
+ data;
+ } catch( e ) {}
+
+ // Make sure we set the data so it isn't changed later
+ jQuery.data( elem, key, data );
+
+ } else {
+ data = undefined;
+ }
+ }
+
+ return data;
+}
+
+})( jQuery );
git.asbjorn.biz / jquery.git / blobdiff