feat(collapse): add possibility to collapse horizontally

src/collapse/collapse.js

@@ -5,16 +5,44 @@ angular.module('ui.bootstrap.collapse', [])
     return {
       link: function(scope, element, attrs) {
         var expandingExpr = $parse(attrs.expanding),
-            expandedExpr = $parse(attrs.expanded),
-            collapsingExpr = $parse(attrs.collapsing),
-            collapsedExpr = $parse(attrs.collapsed);
+          expandedExpr = $parse(attrs.expanded),
+          collapsingExpr = $parse(attrs.collapsing),
+          collapsedExpr = $parse(attrs.collapsed),
+          horizontal = false,
+          css = {},
+          cssTo = {};
 
-        if (!scope.$eval(attrs.uibCollapse)) {
-          element.addClass('in')
-            .addClass('collapse')
-            .attr('aria-expanded', true)
-            .attr('aria-hidden', false)
-            .css({height: 'auto'});
+        init();
+
+        function init() {
+          horizontal = !!('horizontal' in attrs);
+          if (horizontal) {
+            css = {
+              width: 'auto',
+              height: 'inherit'
+            };
+            cssTo = {width: '0'};
+          } else {
+            css = {
+              width: 'inherit',
+              height: 'auto'
+            };
+            cssTo = {height: '0'};
+          }
+          if (!scope.$eval(attrs.uibCollapse)) {
+            element.addClass('in')
+              .addClass('collapse')
+              .attr('aria-expanded', true)
+              .attr('aria-hidden', false)
+              .css(css);
+          }
+        }
+
+        function getScrollFromElement(element) {
+          if (horizontal) {
+            return {width: element.scrollWidth + 'px'};
+          }
+          return {height: element.scrollHeight + 'px'};
         }
 
         function expand() {
@@ -33,11 +61,11 @@ angular.module('ui.bootstrap.collapse', [])
                 $animateCss(element, {
                   addClass: 'in',
                   easing: 'ease',
-                  to: { height: element[0].scrollHeight + 'px' }
+                  to: getScrollFromElement(element[0])
                 }).start()['finally'](expandDone);
               } else {
                 $animate.addClass(element, 'in', {
-                  to: { height: element[0].scrollHeight + 'px' }
+                  to: getScrollFromElement(element[0])
                 }).then(expandDone);
               }
             });
@@ -46,7 +74,7 @@ angular.module('ui.bootstrap.collapse', [])
         function expandDone() {
           element.removeClass('collapsing')
             .addClass('collapse')
-            .css({height: 'auto'});
+            .css(css);
           expandedExpr(scope);
         }
 
@@ -58,10 +86,10 @@ angular.module('ui.bootstrap.collapse', [])
           $q.resolve(collapsingExpr(scope))
             .then(function() {
               element
-                // IMPORTANT: The height must be set before adding "collapsing" class.
-                // Otherwise, the browser attempts to animate from height 0 (in
-                // collapsing class) to the given height here.
-                .css({height: element[0].scrollHeight + 'px'})
+              // IMPORTANT: The width must be set before adding "collapsing" class.
+              // Otherwise, the browser attempts to animate from width 0 (in
+              // collapsing class) to the given width here.
+                .css(getScrollFromElement(element[0]))
                 // initially all panel collapse have the collapse class, this removal
                 // prevents the animation from jumping to collapsed state
                 .removeClass('collapse')
@@ -72,18 +100,18 @@ angular.module('ui.bootstrap.collapse', [])
               if ($animateCss) {
                 $animateCss(element, {
                   removeClass: 'in',
-                  to: {height: '0'}
+                  to: cssTo
                 }).start()['finally'](collapseDone);
               } else {
                 $animate.removeClass(element, 'in', {
-                  to: {height: '0'}
+                  to: cssTo
                 }).then(collapseDone);
               }
             });
         }
 
         function collapseDone() {
-          element.css({height: '0'}); // Required so that collapse works when animation is disabled
+          element.css(cssTo); // Required so that collapse works when animation is disabled
           element.removeClass('collapsing')
             .addClass('collapse');
           collapsedExpr(scope);

src/collapse/docs/demo.html

@@ -1,7 +1,13 @@
 <div ng-controller="CollapseDemoCtrl">
-	<button type="button" class="btn btn-default" ng-click="isCollapsed = !isCollapsed">Toggle collapse</button>
+	<button type="button" class="btn btn-default" ng-click="isCollapsed = !isCollapsed">Toggle collapse Vertically</button>
 	<hr>
 	<div uib-collapse="isCollapsed">
 		<div class="well well-lg">Some content</div>
 	</div>
+
+	<button type="button" class="btn btn-default" ng-click="isCollapsedHorizontal = !isCollapsedHorizontal">Toggle collapse Horizontally</button>
+	<hr>
+	<div uib-collapse="isCollapsedHorizontal" horizontal>
+		<div class="well well-lg">Some content</div>
+	</div>
 </div>

src/collapse/docs/demo.js

@@ -1,3 +1,4 @@
 angular.module('ui.bootstrap.demo').controller('CollapseDemoCtrl', function ($scope) {
   $scope.isCollapsed = false;
+  $scope.isCollapsedHorizontal = false;
 });

src/collapse/docs/readme.md

@@ -27,4 +27,8 @@
   <i class="glyphicon glyphicon-eye-open"></i>
   _(Default: `false`)_ -
   Whether the element should be collapsed or not.
+
+* `horizontal`
+  <small class="badge">$</small> -
+  An optional attribute that permit to collapse horizontally.
 

src/collapse/test/collapseHorizontally.spec.js

@@ -0,0 +1,255 @@
+describe('collapse directive', function() {
+  var elementH, compileFnH, scope, $compile, $animate, $q;
+
+  beforeEach(module('ui.bootstrap.collapse'));
+  beforeEach(module('ngAnimateMock'));
+  beforeEach(inject(function(_$rootScope_, _$compile_, _$animate_, _$q_) {
+    scope = _$rootScope_;
+    $compile = _$compile_;
+    $animate = _$animate_;
+    $q = _$q_;
+  }));
+
+  beforeEach(function() {
+    elementH = angular.element(
+      '<div uib-collapse="isCollapsed" '
+      + 'expanding="expanding()" '
+      + 'expanded="expanded()" '
+      + 'collapsing="collapsing()" '
+      + 'collapsed="collapsed()" '
+      + 'horizontal>'
+      + 'Some Content</div>');
+    compileFnH = $compile(elementH);
+    angular.element(document.body).append(elementH);
+  });
+
+  afterEach(function() {
+    elementH.remove();
+  });
+
+  function initCallbacks() {
+    scope.collapsing = jasmine.createSpy('scope.collapsing');
+    scope.collapsed = jasmine.createSpy('scope.collapsed');
+    scope.expanding = jasmine.createSpy('scope.expanding');
+    scope.expanded = jasmine.createSpy('scope.expanded');
+  }
+
+  function assertCallbacks(expected) {
+    ['collapsing', 'collapsed', 'expanding', 'expanded'].forEach(function(cbName) {
+      if (expected[cbName]) {
+        expect(scope[cbName]).toHaveBeenCalled();
+      } else {
+        expect(scope[cbName]).not.toHaveBeenCalled();
+      }
+    });
+  }
+
+  it('should be hidden on initialization if isCollapsed = true', function() {
+    initCallbacks();
+    scope.isCollapsed = true;
+    compileFnH(scope);
+    scope.$digest();
+    expect(elementH.width()).toBe(0);
+    assertCallbacks({ collapsed: true });
+  });
+
+  it('should not trigger any animation on initialization if isCollapsed = true', function() {
+    var wrapperFn = function() {
+      $animate.flush();
+    };
+
+    scope.isCollapsed = true;
+    compileFnH(scope);
+    scope.$digest();
+
+    expect(wrapperFn).toThrowError(/No pending animations ready to be closed or flushed/);
+  });
+
+  it('should collapse if isCollapsed = true on subsequent use', function() {
+    scope.isCollapsed = false;
+    compileFnH(scope);
+    scope.$digest();
+    initCallbacks();
+    scope.isCollapsed = true;
+    scope.$digest();
+    $animate.flush();
+    expect(elementH.width()).toBe(0);
+    assertCallbacks({ collapsing: true, collapsed: true });
+  });
+
+  it('should show after toggled from collapsed', function() {
+    initCallbacks();
+    scope.isCollapsed = true;
+    compileFnH(scope);
+    scope.$digest();
+    expect(elementH.width()).toBe(0);
+    assertCallbacks({ collapsed: true });
+    scope.collapsed.calls.reset();
+
+    scope.isCollapsed = false;
+    scope.$digest();
+    $animate.flush();
+    expect(elementH.width()).not.toBe(0);
+    assertCallbacks({ expanding: true, expanded: true });
+  });
+
+  it('should not trigger any animation on initialization if isCollapsed = false', function() {
+    var wrapperFn = function() {
+      $animate.flush();
+    };
+
+    scope.isCollapsed = false;
+    compileFnH(scope);
+    scope.$digest();
+
+    expect(wrapperFn).toThrowError(/No pending animations ready to be closed or flushed/);
+  });
+
+  it('should expand if isCollapsed = false on subsequent use', function() {
+    scope.isCollapsed = false;
+    compileFnH(scope);
+    scope.$digest();
+    scope.isCollapsed = true;
+    scope.$digest();
+    $animate.flush();
+    initCallbacks();
+    scope.isCollapsed = false;
+    scope.$digest();
+    $animate.flush();
+    expect(elementH.width()).not.toBe(0);
+    assertCallbacks({ expanding: true, expanded: true });
+  });
+
+  it('should collapse if isCollapsed = true on subsequent uses', function() {
+    scope.isCollapsed = false;
+    compileFnH(scope);
+    scope.$digest();
+    scope.isCollapsed = true;
+    scope.$digest();
+    $animate.flush();
+    scope.isCollapsed = false;
+    scope.$digest();
+    $animate.flush();
+    initCallbacks();
+    scope.isCollapsed = true;
+    scope.$digest();
+    $animate.flush();
+    expect(elementH.width()).toBe(0);
+    assertCallbacks({ collapsing: true, collapsed: true });
+  });
+
+  it('should change aria-expanded attribute', function() {
+    scope.isCollapsed = false;
+    compileFnH(scope);
+    scope.$digest();
+    expect(elementH.attr('aria-expanded')).toBe('true');
+
+    scope.isCollapsed = true;
+    scope.$digest();
+    $animate.flush();
+    expect(elementH.attr('aria-expanded')).toBe('false');
+  });
+
+  it('should change aria-hidden attribute', function() {
+    scope.isCollapsed = false;
+    compileFnH(scope);
+    scope.$digest();
+    expect(elementH.attr('aria-hidden')).toBe('false');
+
+    scope.isCollapsed = true;
+    scope.$digest();
+    $animate.flush();
+    expect(elementH.attr('aria-hidden')).toBe('true');
+  });
+
+  describe('expanding callback returning a promise', function() {
+    var defer, collapsedWidth;
+
+    beforeEach(function() {
+      defer = $q.defer();
+
+      scope.isCollapsed = true;
+      scope.expanding = function() {
+        return defer.promise;
+      };
+      compileFnH(scope);
+      scope.$digest();
+      collapsedWidth = elementH.width();
+
+      // set flag to expand ...
+      scope.isCollapsed = false;
+      scope.$digest();
+
+      // ... shouldn't expand yet ...
+      expect(elementH.attr('aria-expanded')).not.toBe('true');
+      expect(elementH.width()).toBe(collapsedWidth);
+    });
+
+    it('should wait for it to resolve before animating', function() {
+      defer.resolve();
+
+      // should now expand
+      scope.$digest();
+      $animate.flush();
+
+      expect(elementH.attr('aria-expanded')).toBe('true');
+      expect(elementH.width()).toBeGreaterThan(collapsedWidth);
+    });
+
+    it('should not animate if it rejects', function() {
+      defer.reject();
+
+      // should NOT expand
+      scope.$digest();
+
+      expect(elementH.attr('aria-expanded')).not.toBe('true');
+      expect(elementH.width()).toBe(collapsedWidth);
+    });
+  });
+
+  describe('collapsing callback returning a promise', function() {
+    var defer, expandedWidth;
+
+    beforeEach(function() {
+      defer = $q.defer();
+      scope.isCollapsed = false;
+      scope.collapsing = function() {
+        return defer.promise;
+      };
+      compileFnH(scope);
+      scope.$digest();
+
+      expandedWidth = elementH.width();
+
+      // set flag to collapse ...
+      scope.isCollapsed = true;
+      scope.$digest();
+
+      // ... but it shouldn't collapse yet ...
+      expect(elementH.attr('aria-expanded')).not.toBe('false');
+      expect(elementH.width()).toBe(expandedWidth);
+    });
+
+    it('should wait for it to resolve before animating', function() {
+      defer.resolve();
+
+      // should now collapse
+      scope.$digest();
+      $animate.flush();
+
+      expect(elementH.attr('aria-expanded')).toBe('false');
+      expect(elementH.width()).toBeLessThan(expandedWidth);
+    });
+
+    it('should not animate if it rejects', function() {
+      defer.reject();
+
+      // should NOT collapse
+      scope.$digest();
+
+      expect(elementH.attr('aria-expanded')).not.toBe('false');
+      expect(elementH.width()).toBe(expandedWidth);
+    });
+  });
+
+});