Effects.core: Check Visibility vs 'hide' and 'show' modes, finish imm…

…ediately if neccessary - Fixes #6715 - Hide and Show try to affect hidden and showing elements

tests/unit/effects/effects_core.js

@@ -19,6 +19,18 @@ var minDuration = 15,
 
 module( "effects.core" );
 
+test( "Immediate Return Conditions", function() {
+	var hidden = $( "div.hidden" ),
+		count = 0;
+	expect( 6 );
+	hidden.hide( "blind", function() {
+		equal( ++count, 1, "Hide on hidden returned immediately" );
+	}).show().show( "blind", function() {
+		equal( ++count, 2, "Show on shown returned immediately" );
+	});
+	equal( ++count, 3, "Both Functions worked properly" );
+});
+
 $.each( $.effects.effect, function( effect ) {
 	if ( effect === "transfer" ) {
 		return;

ui/jquery.effects.core.js

@@ -556,19 +556,26 @@ $.fn.extend({
 		}
 
 		function run( next ) {
-			var elem = this,
-				complete = args.complete;
+			var elem = $( this ),
+				complete = args.complete,
+				mode = args.mode;
 
 			function done() {
 				if ( $.isFunction( complete ) ) {
-					complete.call( elem );
+					complete.call( elem[0] );
 				}
 				if ( $.isFunction( next ) ) {
 					next();
 				}
 			}
 
-			effectMethod.call( elem, args, done );
+			// if the element is hiddden and mode is hide,
+			// or element is visible and mode is show
+			if ( elem.is( ":hidden" ) ? mode === "hide" : mode === "show" ) {
+				done();
+			} else {
+				effectMethod.call( elem[0], args, done );
+			}
 		}
 
 		// TODO: remove this check in 2.0, effectMethod will always be true