X-Git-Url: http://git.asbjorn.biz/?p=jquery.git;a=blobdiff_plain;f=src%2Fdata.js;h=4d1d1bd55615ba2944c9cfa9b44dbdd93c307f2d;hp=bb7febfbaf4d1df086e48af4a84f09e816f7390f;hb=158fa822dea3198de5a4bcff3955b869ebb758c8;hpb=faabb2c31883deabaddd5642eb5e708b5802f2b0

diff --git a/src/data.js b/src/data.js
index bb7febf..4d1d1bd 100644
--- a/src/data.js
+++ b/src/data.js
@@ -22,6 +22,14 @@ jQuery.extend({
 		"applet": true
 	},
 
+	hasData: function( elem ) {
+		if ( elem.nodeType ) {
+			elem = jQuery.cache[ elem[jQuery.expando] ];
+		}
+
+		return !!elem && !jQuery.isEmptyObject(elem);
+	},
+
 	data: function( elem, name, data ) {
 		if ( !jQuery.acceptData( elem ) ) {
 			return;
@@ -135,8 +143,26 @@ jQuery.extend({
 
 jQuery.fn.extend({
 	data: function( key, value ) {
+		var data = null;
+
 		if ( typeof key === "undefined" ) {
-			return this.length ? jQuery.data( this[0] ) : null;
+			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() {
@@ -148,31 +174,12 @@ jQuery.fn.extend({
 		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 );
-
-				// If nothing was found internally, try to fetch any
-				// data from the HTML5 data-* attribute
-				if ( data === undefined && this[0].nodeType === 1 ) {
-					data = this[0].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 ) {}
-
-					} else {
-						data = undefined;
-					}
-				}
+				data = dataAttr( this[0], key, data );
 			}
 
 			return data === undefined && parts[1] ?
@@ -181,7 +188,8 @@ jQuery.fn.extend({
 
 		} else {
 			return this.each(function() {
-				var $this = jQuery( this ), args = [ parts[0], value ];
+				var $this = jQuery( this ),
+					args = [ parts[0], value ];
 
 				$this.triggerHandler( "setData" + parts[1] + "!", args );
 				jQuery.data( this, key, value );
@@ -197,4 +205,31 @@ jQuery.fn.extend({
 	}
 });
 
+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 );