feat(collapse): use uib- prefix

Closes #4370

src/collapse/collapse.js

@@ -1,6 +1,6 @@
 angular.module('ui.bootstrap.collapse', [])
 
-  .directive('collapse', ['$animate', '$injector', function($animate, $injector) {
+  .directive('uibCollapse', ['$animate', '$injector', function($animate, $injector) {
     var $animateCss = $injector.has('$animateCss') ? $injector.get('$animateCss') : null;
     return {
       link: function(scope, element, attrs) {
@@ -64,6 +64,91 @@ angular.module('ui.bootstrap.collapse', [])
             .addClass('collapse');
         }
 
+        scope.$watch(attrs.uibCollapse, function(shouldCollapse) {
+          if (shouldCollapse) {
+            collapse();
+          } else {
+            expand();
+          }
+        });
+      }
+    };
+  }]);
+
+/* Deprecated collapse below */
+
+angular.module('ui.bootstrap.collapse')
+
+  .value('$collapseSuppressWarning', false)
+
+  .directive('collapse', ['$animate', '$injector', '$log', '$collapseSuppressWarning', function($animate, $injector, $log, $collapseSuppressWarning) {
+    var $animateCss = $injector.has('$animateCss') ? $injector.get('$animateCss') : null;
+    return {
+      link: function(scope, element, attrs) {
+        if (!$collapseSuppressWarning) {
+          $log.warn('collapse is now deprecated. Use uib-collapse instead.');
+        }
+
+        function expand() {
+          element.removeClass('collapse')
+            .addClass('collapsing')
+            .attr('aria-expanded', true)
+            .attr('aria-hidden', false);
+
+          if ($animateCss) {
+            $animateCss(element, {
+              addClass: 'in',
+              easing: 'ease',
+              to: { height: element[0].scrollHeight + 'px' }
+            }).start().done(expandDone);
+          } else {
+            $animate.addClass(element, 'in', {
+              to: { height: element[0].scrollHeight + 'px' }
+            }).then(expandDone);
+          }
+        }
+
+        function expandDone() {
+          element.removeClass('collapsing')
+            .addClass('collapse')
+            .css({height: 'auto'});
+        }
+
+        function collapse() {
+          if (!element.hasClass('collapse') && !element.hasClass('in')) {
+            return collapseDone();
+          }
+
+          element
+            // IMPORTANT: The height must be set before adding "collapsing" class.
+            // Otherwise, the browser attempts to animate from height 0 (in
+            // collapsing class) to the given height here.
+            .css({height: element[0].scrollHeight + 'px'})
+            // initially all panel collapse have the collapse class, this removal
+            // prevents the animation from jumping to collapsed state
+            .removeClass('collapse')
+            .addClass('collapsing')
+            .attr('aria-expanded', false)
+            .attr('aria-hidden', true);
+
+          if ($animateCss) {
+            $animateCss(element, {
+              removeClass: 'in',
+              to: {height: '0'}
+            }).start().done(collapseDone);
+          } else {
+            $animate.removeClass(element, 'in', {
+              to: {height: '0'}
+            }).then(collapseDone);
+          }
+        }
+
+        function collapseDone() {
+          element.css({height: '0'}); // Required so that collapse works when animation is disabled
+          element.removeClass('collapsing')
+            .addClass('collapse');
+        }
+
         scope.$watch(attrs.collapse, function(shouldCollapse) {
           if (shouldCollapse) {
             collapse();

src/collapse/docs/demo.html

@@ -1,7 +1,7 @@
 <div ng-controller="CollapseDemoCtrl">
 	<button type="button" class="btn btn-default" ng-click="isCollapsed = !isCollapsed">Toggle collapse</button>
 	<hr>
-	<div collapse="isCollapsed">
-		<div class="well well-lg">Some content</div> 
+	<div uib-collapse="isCollapsed">
+		<div class="well well-lg">Some content</div>
 	</div>
-</div>
+</div>

src/collapse/test/collapse.spec.js

@@ -10,7 +10,7 @@ describe('collapse directive', function() {
   }));
 
   beforeEach(function() {
-    element = $compile('<div collapse="isCollapsed">Some Content</div>')(scope);
+    element = $compile('<div uib-collapse="isCollapsed">Some Content</div>')(scope);
     angular.element(document.body).append(element);
   });
 
@@ -98,7 +98,7 @@ describe('collapse directive', function() {
     var element;
 
     beforeEach(function() {
-      element = angular.element('<div collapse="isCollapsed"><p>Initial content</p><div ng-show="exp">Additional content</div></div>');
+      element = angular.element('<div uib-collapse="isCollapsed"><p>Initial content</p><div ng-show="exp">Additional content</div></div>');
       $compile(element)(scope);
       angular.element(document.body).append(element);
     });
@@ -129,3 +129,36 @@ describe('collapse directive', function() {
     });
   });
 });
+
+/* Deprecation tests below */
+
+describe('collapse deprecation', function() {
+  beforeEach(module('ui.bootstrap.collapse'));
+  beforeEach(module('ngAnimateMock'));
+
+  it('should suppress warning', function() {
+    module(function($provide) {
+      $provide.value('$collapseSuppressWarning', true);
+    });
+
+    inject(function($compile, $log, $rootScope) {
+      spyOn($log, 'warn');
+
+      var element = $compile('<div collapse="isCollapsed">Some Content</div>')($rootScope);
+      $rootScope.$digest();
+
+      expect($log.warn.calls.count()).toBe(0);
+    });
+  });
+
+  it('should give warning by default', inject(function($compile, $log, $rootScope) {
+    spyOn($log, 'warn');
+
+    var element = $compile('<div collapse="isCollapsed">Some Content</div>')($rootScope);
+    $rootScope.$digest();
+
+    expect($log.warn.calls.count()).toBe(1);
+    expect($log.warn.calls.argsFor(0)).toEqual(['collapse is now deprecated. Use uib-collapse instead.']);
+
+  }));
+});