X-Git-Url: http://git.asbjorn.biz/?p=jquery.git;a=blobdiff_plain;f=src%2Fdata.js;h=faa44f3de1f43aeab2f481afc291555f286750ae;hp=079cf99d54e7221ab4b3c3dec626885eee822871;hb=7acb141ed7f2dedd950bb65acf878098640d081e;hpb=255068da33e3d131b3a641c041fb8cecb1543fa4

diff --git a/src/data.js b/src/data.js
index 079cf99..faa44f3 100644
--- a/src/data.js
+++ b/src/data.js
@@ -1,172 +1,296 @@
-var expando = "jQuery" + now(), uuid = 0, windowData = {};
-var emptyObject = {};
+(function( jQuery ) {
+
+var rbrace = /^(?:\{.*\}|\[.*\])$/;
 
 jQuery.extend({
 	cache: {},
-	
-	expando:expando,
 
-	data: function( elem, name, data ) {
-		elem = elem == window ?
-			windowData :
-			elem;
+	// 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,
+		// Ban all objects except for Flash (which handle expandos)
+		"object": "clsid:D27CDB6E-AE6D-11cf-96B8-444553540000",
+		"applet": true
+	},
+
+	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;
+		}
+
+		var internalKey = jQuery.expando, getByName = typeof name === "string", thisCache,
 
-		var id = elem[ expando ], cache = jQuery.cache, 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,
 
-		// Handle the case where there's no name immediately
-		if ( !name && !id ) {
-			return null;
+			// 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,
+
+			// 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 ( cache[ id ] ) {
-			thisCache = cache[ id ];
-		} else if ( typeof data === "undefined" ) {
-			thisCache = emptyObject;
-		} else {
-			thisCache = cache[ id ] = {};
+		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 () {};
+		}
+
+		// 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);
+			}
 		}
-		
-		// Prevent overriding the named cache with undefined values
+
+		thisCache = cache[ id ];
+
+		// 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 ) {
-			elem[ expando ] = id;
 			thisCache[ name ] = data;
 		}
-		
-		return name ? 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 ) {
-		elem = elem == window ?
-			windowData :
-			elem;
+	removeData: function( elem, name, pvt /* Internal Use Only */ ) {
+		if ( !jQuery.acceptData( elem ) ) {
+			return;
+		}
+
+		var internalKey = jQuery.expando, isNode = elem.nodeType,
 
-		var id = elem[ expando ], cache = jQuery.cache, thisCache = cache[ id ];
+			// See jQuery.data for more information
+			cache = isNode ? jQuery.cache : elem,
+
+			// See jQuery.data for more information
+			id = isNode ? elem[ jQuery.expando ] : jQuery.expando;
+
+		// 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 ];
 
-			// Completely remove the data cache
-			delete cache[ id ];
+			// 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;
+			}
 		}
-	},
-	
-	queue: function( elem, type, data ) {
-		if ( !elem ) { return; }
-
-		type = (type || "fx") + "queue";
-		var q = jQuery.data( elem, type );
 
-		// Speed up dequeue by getting out quickly if this is just a lookup
-		if ( !data ) { return q || []; }
+		var internalCache = cache[ id ][ internalKey ];
 
-		if ( !q || jQuery.isArray(data) ) {
-			q = jQuery.data( elem, type, jQuery.makeArray(data) );
+		// 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 {
-			q.push( data );
+			cache[ id ] = null;
 		}
-		return q;
-	},
 
-	dequeue: function( elem, type ){
-		type = type || "fx";
+		// 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;
 
-		var queue = jQuery.queue( elem, type ), fn = queue.shift();
+		// 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;
+			}
+		}
+	},
 
-		// If the fx queue is dequeued, always remove the progress sentinel
-		if ( fn === "inprogress" ) { fn = queue.shift(); }
+	// For internal use only.
+	_data: function( elem, name, data ) {
+		return jQuery.data( elem, name, data, true );
+	},
 
-		if ( fn ) {
-			// Add a progress sentinel to prevent the fx queue from being
-			// automatically dequeued
-			if ( type == "fx" ) { queue.unshift("inprogress"); }
+	// 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() ];
 
-			fn.call(elem, function() { jQuery.dequeue(elem, type); });
+			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] );
+	data: function( key, value ) {
+		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() {
+				jQuery.data( this, key );
+			});
 		}
 
 		var parts = key.split(".");
 		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 );
 			});
 		}
 	},
 
-	removeData: function( key ){
-		return this.each(function(){
+	removeData: function( key ) {
+		return this.each(function() {
 			jQuery.removeData( this, key );
 		});
-	},
-	queue: function(type, data){
-		if ( typeof type !== "string" ) {
-			data = type;
-			type = "fx";
-		}
+	}
+});
 
-		if ( data === undefined ) {
-			return jQuery.queue( this[0], type );
-		}
-		return this.each(function(i, elem){
-			var queue = jQuery.queue( this, type, data );
+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 ( type == "fx" && queue[0] !== "inprogress" ) {
-				jQuery.dequeue( this, type );
-			}
-		});
-	},
-	dequeue: function(type){
-		return this.each(function(){
-			jQuery.dequeue( this, type );
-		});
-	},
-	clearQueue: function(type){
-		return this.queue( type || "fx", [] );
+		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 );