Fix #12148. Let .toggle() call the public .hide() for punching.

There is a slightly shorter way to do this but it's not Closure-friendly.

src/css.js

@@ -43,8 +43,7 @@ function vendorPropName( style, name ) {
 	return origName;
 }
 
-function isHidden( elem, el ) {
-	elem = el || elem;
+function isHidden( elem ) {
 	return jQuery.css( elem, "display" ) === "none" || !jQuery.contains( elem.ownerDocument.documentElement, elem );
 }
 
@@ -111,16 +110,19 @@ jQuery.fn.extend({
 	hide: function() {
 		return showHide( this );
 	},
-	toggle: function( fn, fn2 ) {
-		var bool = typeof fn === "boolean";
+	toggle: function( state, fn2 ) {
+		var bool = typeof state === "boolean";
 
-		if ( jQuery.isFunction( fn ) && jQuery.isFunction( fn2 ) ) {
+		if ( jQuery.isFunction( state ) && jQuery.isFunction( fn2 ) ) {
 			return eventsToggle.apply( this, arguments );
 		}
 
 		return this.each(function() {
-			var state = bool ? fn : jQuery( this ).is(":hidden");
-			showHide([ this ], state );
+			if ( bool ? state : isHidden( this ) ) {
+				jQuery( this ).show();
+			} else {
+				jQuery( this ).hide();
+			}
 		});
 	}
 });

test/unit/css.js

@@ -561,7 +561,7 @@ test( "show() resolves correct default display, detached nodes (#10006)", functi
 });
 
 test("toggle()", function() {
-	expect(6);
+	expect(7);
 	var x = jQuery("#foo");
 	ok( x.is(":visible"), "is visible" );
 	x.toggle();
@@ -575,6 +575,17 @@ test("toggle()", function() {
 	ok( x.is(":hidden"), "is hidden" );
 	x.toggle(true);
 	ok( x.is(":visible"), "is visible again" );
+	
+	// Ensure hide() is called when toggled (#12148)
+	var oldHide = jQuery.fn.hide;
+	jQuery.fn.hide = function() {
+		ok( true, name + " method called on toggle" );
+		return oldHide.apply( this, arguments );
+	};
+	x.toggle( name === "show" );
+	jQuery.fn.hide = oldHide;
+
+
 });
 
 test("hide hidden elements (bug #7141)", function() {