fix(dialog): only restore focus with keyboard interaction

* Currently the dialog always restores focus to the origin element upon close.

* The focus should be only restored if the dialog was opened with keyboard interaction - Same behavior as with the sidenav closing.

Fixes #7963.

Author: devversion

src/components/dialog/dialog.js

@@ -638,7 +638,7 @@ function MdDialogProvider($$interimElementProvider) {
 
   /* @ngInject */
   function dialogDefaultOptions($mdDialog, $mdAria, $mdUtil, $mdConstant, $animate, $document, $window, $rootElement,
-                                $log, $injector, $mdTheming, $interpolate) {
+                                $log, $injector, $mdTheming, $interpolate, $mdInteraction) {
 
     return {
       hasBackdrop: true,
@@ -798,7 +798,10 @@ function MdDialogProvider($$interimElementProvider) {
         // Exposed cleanup function from the $mdCompiler.
         options.cleanupElement();
 
-        if (!options.$destroy) options.origin.focus();
+        // Restores the focus to the origin element if the last interaction upon opening was a keyboard.
+        if (!options.$destroy && options.originInteraction === 'keyboard') {
+          options.origin.focus();
+        }
       }
     }
 
@@ -850,7 +853,8 @@ function MdDialogProvider($$interimElementProvider) {
           options.openFrom = getBoundingClientRect(getDomElement(options.openFrom));
 
           if ( options.targetEvent ) {
-            options.origin   = getBoundingClientRect(options.targetEvent.target, options.origin);
+            options.origin = getBoundingClientRect(options.targetEvent.target, options.origin);
+            options.originInteraction = $mdInteraction.getLastInteractionType();
           }
 
 

src/components/dialog/dialog.spec.js

@@ -1134,6 +1134,82 @@ describe('$mdDialog', function() {
       expect($document.activeElement).toBe(parent[0].querySelector('#focus-target'));
     }));
 
+    it('should restore the focus to the origin upon close', inject(function($mdDialog, $compile, $rootScope) {
+      var scope = $rootScope.$new();
+      var body = angular.element(document.body);
+      var parent = angular.element('<div>');
+      var button = $compile('<button ng-click="openDialog($event)">Open</button>')(scope);
+
+      // Append the button to the body, because otherwise the dialog is not able to determine
+      // the origin rectangle.
+      document.body.appendChild(button[0]);
+
+      scope.openDialog = function($event) {
+        $mdDialog.show({
+          parent: parent,
+          template: '<md-dialog>Test</md-dialog>',
+          targetEvent: $event,
+          scope: scope.$new()
+        });
+      };
+
+      // Emit a keyboard event to fake a keyboard interaction.
+      body.triggerHandler('keydown');
+      button.triggerHandler('click');
+
+      runAnimation();
+
+      expect(parent.find('md-dialog').length).toBe(1);
+      expect(document.activeElement).not.toBe(button[0]);
+
+
+      $mdDialog.hide();
+      runAnimation();
+
+      expect(parent.find('md-dialog').length).toBe(0);
+      expect(document.activeElement).toBe(button[0]);
+
+      button.remove();
+    }));
+
+    it('should not restore the focus without keyboard interaction', inject(function($mdDialog, $compile, $rootScope) {
+      var scope = $rootScope.$new();
+      var body = angular.element(document.body);
+      var parent = angular.element('<div>');
+      var button = $compile('<button ng-click="openDialog($event)">Open</button>')(scope);
+
+      // Append the button to the body, because otherwise the dialog is not able to determine
+      // the origin rectangle.
+      document.body.appendChild(button[0]);
+
+      scope.openDialog = function($event) {
+        $mdDialog.show({
+          parent: parent,
+          template: '<md-dialog>Test</md-dialog>',
+          targetEvent: $event,
+          scope: scope.$new()
+        });
+      };
+
+      // Emit a keyboard event to fake a mouse interaction.
+      body.triggerHandler('mousedown');
+      button.triggerHandler('click');
+
+      runAnimation();
+
+      expect(parent.find('md-dialog').length).toBe(1);
+      expect(document.activeElement).not.toBe(button[0]);
+
+
+      $mdDialog.hide();
+      runAnimation();
+
+      expect(parent.find('md-dialog').length).toBe(0);
+      expect(document.activeElement).not.toBe(button[0]);
+
+      button.remove();
+    }));
+
     it('should focus the dialog element if no actions are set', inject(function($mdDialog, $rootScope, $document) {
       jasmine.mockElementFocus(this);