Modal reposition

src/modal/docs/demo.html

@@ -7,6 +7,7 @@ <h3>I'm a modal!</h3>
       </li>
     </ul>
     <p>Selected: <b>{{ selected.item }}</b></p>
+    <button class="button secondary" ng-click="reposition()">Reset top position</button>
     <button class="button" ng-click="ok()">OK</button>
     <a class="close-reveal-modal" ng-click="cancel()">&#215;</a>
   </script>

src/modal/docs/demo.js

@@ -32,11 +32,15 @@ angular.module('foundationDemoApp').controller('ModalInstanceCtrl', function ($s
     item: $scope.items[0]
   };
 
+  $scope.reposition = function () {
+    $modalInstance.reposition();
+  };
+
   $scope.ok = function () {
     $modalInstance.close($scope.selected.item);
   };
 
   $scope.cancel = function () {
     $modalInstance.dismiss('cancel');
   };
-});
+});

src/modal/docs/readme.md

@@ -18,6 +18,7 @@ The `open` method returns a modal instance, an object with the following propert
 
 * `close(result)` - a method that can be used to close a modal, passing a result
 * `dismiss(reason)` - a method that can be used to dismiss a modal, passing a reason
+* `reposition()` - a method that can be used to re-calculate the top position of the modal
 * `result` - a promise that is resolved when a modal is closed and rejected when a modal is dismissed
 * `opened` - a promise that is resolved when a modal gets opened after downloading content's template and resolving all variables
 

src/modal/modal.js

@@ -118,7 +118,7 @@ angular.module('mm.foundation.modal', ['mm.foundation.transition'])
 
       var OPENED_MODAL_CLASS = 'modal-open';
 
-      var backdropDomEl, backdropScope;
+      var backdropDomEl, backdropScope, cssTop;
       var openedWindows = $$stackedMap.createNew();
       var $modalStack = {};
 
@@ -199,6 +199,14 @@ angular.module('mm.foundation.modal', ['mm.foundation.transition'])
         }
       }
 
+      function calculateModalTop(modalElement, offset) {
+        if (angular.isUndefined(offset)) {
+          offset = 0;
+        }
+        var scrollY = $window.pageYOffset || 0;
+        return offset + scrollY;
+      }
+
       $document.bind('keydown', function (evt) {
         var modal;
 
@@ -236,13 +244,10 @@ angular.module('mm.foundation.modal', ['mm.foundation.transition'])
         // distance to top
         var faux = angular.element('<div class="reveal-modal" style="z-index:-1""></div>');
         parent.append(faux[0]);
-        var marginTop = parseInt(getComputedStyle(faux[0]).top) || 0;
+        cssTop = parseInt($window.getComputedStyle(faux[0]).top) || 0;
+        var openAt = calculateModalTop(faux, cssTop);
         faux.remove();
 
-        // Using pageYOffset instead of scrollY to ensure compatibility with IE
-        var scrollY = $window.pageYOffset || 0;
-        var openAt = scrollY + marginTop;
-
         var angularDomEl = angular.element('<div modal-window style="visibility: visible; top:' + openAt +'px;"></div>')
           .attr({
             'window-class': modal.windowClass,
@@ -257,6 +262,15 @@ angular.module('mm.foundation.modal', ['mm.foundation.transition'])
         parent.addClass(OPENED_MODAL_CLASS);
       };
 
+      $modalStack.reposition = function (modalInstance) {
+        var modalWindow = openedWindows.get(modalInstance).value;
+        if (modalWindow) {
+          var modalDomEl = modalWindow.modalDomEl;
+          var top = calculateModalTop(modalDomEl, cssTop);
+          modalDomEl.css('top', top + "px");
+        }
+      };
+
       $modalStack.close = function (modalInstance, result) {
         var modalWindow = openedWindows.get(modalInstance);
         if (modalWindow) {
@@ -331,6 +345,9 @@ angular.module('mm.foundation.modal', ['mm.foundation.transition'])
               },
               dismiss: function (reason) {
                 $modalStack.dismiss(modalInstance, reason);
+              },
+              reposition: function () {
+                $modalStack.reposition(modalInstance);
               }
             };
 

src/modal/test/modal.spec.js

@@ -1,7 +1,7 @@
 describe('$modal', function () {
   var $rootScope, $document, $compile, $templateCache, $timeout, $q, $window, $provide;
   var $modal, $modalProvider;
-  var mockWindow = {};
+  var mockWindow, mockComputedStyle;
 
   var triggerKeyDown = function (element, keyCode) {
     var e = $.Event("keydown");
@@ -27,13 +27,18 @@ describe('$modal', function () {
     var mockdocument = angular.element(document);
     $provide.value('$document', mockdocument);
 
-    mockwindow = {
+    mockComputedStyle = {
+      top: 0
+    };
+
+    mockWindow = {
       location: "val",
       document: mockdocument,
       pageYOffset: 4,
-      this_is_a_mock_window: true
+      this_is_a_mock_window: true,
+      getComputedStyle: jasmine.createSpy("$window.getComputedStyle").andReturn(mockComputedStyle)
     };
-    $provide.value('$window', mockwindow);
+    $provide.value('$window', mockWindow);
 
   }));
 
@@ -159,16 +164,14 @@ describe('$modal', function () {
   }
 
   describe('modal invoked with y offsets', function () {
+    it('should create the modal at the correct location based on window y position', function () {
+      $window.pageYOffset = 400;
 
-        it('should create the modal at the correct location based on window y position', function () {
-          $window.pageYOffset = 400;
-
-          var modal = open({template: '<div>Content</div>'});
-          expect($document).toHaveModalsOpen(1);
-          expect($document).toHaveModalOpenWithStyle('top', '400px');
-        });
-
-      });
+      var modal = open({template: '<div>Content</div>'});
+      expect($document).toHaveModalsOpen(1);
+      expect($document).toHaveModalOpenWithStyle('top', '400px');
+    });
+  });
 
   describe('basic scenarios with default options', function () {
 
@@ -304,12 +307,23 @@ describe('$modal', function () {
       $timeout.flush();
       expect($rootScope.$$childTail).toEqual(null);
     });
+
+    describe("$modalInstance.reposition()", function() {
+      it('should re-calculate the modal margin top', function () {
+        $window.pageYOffset = 400;
+        var modal = open({template: '<div>Content</div>'});
+        expect($document).toHaveModalOpenWithStyle('top', '400px');
+
+        $window.pageYOffset = 500;
+        modal.reposition();
+        expect($document).toHaveModalOpenWithStyle('top', '500px');
+      });
+    });
   });
 
   describe('default options can be changed in a provider', function () {
 
     it('should allow overriding default options in a provider', function () {
-
       $modalProvider.options.backdrop = false;
       var modal = open({template: '<div>Content</div>'});