feat(dropdown): add open class support

- Adds support for the `uib-dropdown-open` class to be toggled on the container element of a dropdown menu on dropdown toggle

Closes #4466
Closes #4794

src/dropdown/dropdown.js

@@ -1,6 +1,7 @@
 angular.module('ui.bootstrap.dropdown', ['ui.bootstrap.position'])
 
 .constant('uibDropdownConfig', {
+  appendToOpenClass: 'uib-dropdown-open',
   openClass: 'open'
 })
 
@@ -69,6 +70,7 @@ angular.module('ui.bootstrap.dropdown', ['ui.bootstrap.position'])
   var self = this,
     scope = $scope.$new(), // create a child scope so we are not polluting original one
     templateScope,
+    appendToOpenClass = dropdownConfig.appendToOpenClass,
     openClass = dropdownConfig.openClass,
     getIsOpen,
     setIsOpen = angular.noop,
@@ -216,7 +218,7 @@ angular.module('ui.bootstrap.dropdown', ['ui.bootstrap.position'])
 
     var openContainer = appendTo ? appendTo : $element;
 
-    $animate[isOpen ? 'addClass' : 'removeClass'](openContainer, openClass).then(function() {
+    $animate[isOpen ? 'addClass' : 'removeClass'](openContainer, appendTo ? appendToOpenClass : openClass).then(function() {
       if (angular.isDefined(isOpen) && isOpen !== wasOpen) {
         toggleInvoker($scope, { open: !!isOpen });
       }

src/dropdown/test/dropdown.spec.js

@@ -261,11 +261,11 @@ describe('dropdownToggle', function() {
     it('toggles open class on container', function() {
       var container = $document.find('#dropdown-container');
 
-      expect(container.hasClass('open')).toBe(false);
+      expect(container.hasClass('uib-dropdown-open')).toBe(false);
       element.find('[uib-dropdown-toggle]').click();
-      expect(container.hasClass('open')).toBe(true);
+      expect(container.hasClass('uib-dropdown-open')).toBe(true);
       element.find('[uib-dropdown-toggle]').click();
-      expect(container.hasClass('open')).toBe(false);
+      expect(container.hasClass('uib-dropdown-open')).toBe(false);
     });
 
     it('removes the menu when the dropdown is removed', function() {
@@ -481,11 +481,11 @@ describe('dropdownToggle', function() {
         element = $compile('<li uib-dropdown dropdown-append-to-body auto-close="outsideClick"><a href uib-dropdown-toggle></a><ul class="uib-dropdown-menu" id="dropdown-menu"><li><a href>Hello On Body</a></li></ul></li>')($rootScope);
         clickDropdownToggle();
         var dropdownMenu = $document.find('#dropdown-menu');
-        expect(dropdownMenu.parent().hasClass(dropdownConfig.openClass)).toBe(true);
+        expect(dropdownMenu.parent().hasClass(dropdownConfig.appendToOpenClass)).toBe(true);
         dropdownMenu.find('li').eq(0).trigger('click');
-        expect(dropdownMenu.parent().hasClass(dropdownConfig.openClass)).toBe(true);
+        expect(dropdownMenu.parent().hasClass(dropdownConfig.appendToOpenClass)).toBe(true);
         $document.click();
-        expect(dropdownMenu.parent().hasClass(dropdownConfig.openClass)).toBe(false);
+        expect(dropdownMenu.parent().hasClass(dropdownConfig.appendToOpenClass)).toBe(false);
       });
     });
 
@@ -713,7 +713,7 @@ describe('dropdownToggle', function() {
 
       var dropdownMenu = $document.find('#dropdown-menu');
 
-      expect(dropdownMenu.parent().hasClass(dropdownConfig.openClass)).toBe(true);
+      expect(dropdownMenu.parent().hasClass(dropdownConfig.appendToOpenClass)).toBe(true);
       var focusEl = $document.find('ul').eq(0).find('a');
       expect(isFocused(focusEl)).toBe(true);
     });
@@ -725,7 +725,7 @@ describe('dropdownToggle', function() {
 
       var dropdownMenu = $document.find('#dropdown-menu');
 
-      expect(dropdownMenu.parent().hasClass(dropdownConfig.openClass)).toBe(true);
+      expect(dropdownMenu.parent().hasClass(dropdownConfig.appendToOpenClass)).toBe(true);
       var elem1 = $document.find('ul');
       var elem2 = elem1.find('a');
       var focusEl = $document.find('ul').eq(0).find('a').eq(1);