Sortable: Copy the src of the original item when creating a placehold…

…er from an image. Fixes #5129 - Sortable: Unable to use an image as a placeholder in Firefox.

tests/unit/sortable/sortable.html

@@ -84,6 +84,13 @@ <h2 id="qunit-userAgent"></h2>
 	</tbody>
 </table>
 
+<div id="sortable-images">
+	<img src="../images/jqueryui_32x32.png">
+	<img src="../images/jqueryui_32x32.png">
+	<img src="../images/jqueryui_32x32.png">
+	<img src="../images/jqueryui_32x32.png">
+</div>
+
 </div>
 </body>
 </html>

tests/unit/sortable/sortable_options.js

@@ -5,10 +5,6 @@
 
 module("sortable: options");
 
-// this is here to make JSHint pass "unused", and we don't want to
-// remove the parameter for when we finally implement
-$.noop();
-
 /*
 test("{ appendTo: 'parent' }, default", function() {
 	ok(false, "missing test - untested code is broken code.");
@@ -186,6 +182,23 @@ test("{ placeholder: false }, default", function() {
 	ok(false, "missing test - untested code is broken code.");
 });
 */
+
+test( "{ placeholder: false } img", function() {
+	expect( 3 );
+
+	var element = $( "#sortable-images" ).sortable({
+		start: function( event, ui ) {
+			equal( ui.placeholder.attr( "src" ), "../images/jqueryui_32x32.png", "placeholder img has correct src" );
+			equal( ui.placeholder.height(), 32, "placeholder has correct height" );
+			equal( ui.placeholder.width(), 32, "placeholder has correct width" );
+		}
+	});
+
+	element.find( "img" ).eq( 0 ).simulate( "drag", {
+		dy: 1
+	});
+});
+
 test( "{ placeholder: String }", function() {
 	expect( 1 );
 

ui/jquery.ui.sortable.js

@@ -762,6 +762,8 @@ $.widget("ui.sortable", $.ui.mouse, {
 						// width of the table (browsers are smart enough to
 						// handle this properly)
 						element.append( "<td colspan='99'>&#160;</td>" );
+					} else if ( nodeName === "img" ) {
+						element.attr( "src", that.currentItem.attr( "src" ) );
 					}
 
 					if ( !className ) {