Addressing issues from code review

platform/commonUI/browse/bundle.js

@@ -111,9 +111,11 @@ define([
                         "$scope",
                         "$route",
                         "$location",
+                        "$window",
                         "objectService",
                         "navigationService",
                         "urlService",
+                        "policyService",
                         "DEFAULT_PATH"
                     ]
                 },

platform/commonUI/browse/src/BrowseController.js

@@ -33,6 +33,7 @@ define(
         "use strict";
 
         var ROOT_ID = "ROOT",
+            DEFAULT_PATH = "mine",
             CONFIRM_MSG = "Unsaved changes will be lost if you leave this page.";
 
         /**
@@ -46,12 +47,14 @@ define(
          * @constructor
          */
         function BrowseController(
-            $scope,
+            $scope, 
-            $route,
+            $route, 
-            $location,
+            $location, 
-            objectService,
+            $window, 
-            navigationService,
+            objectService, 
-            urlService,
+            navigationService, 
+            urlService, 
+            policyService,
             defaultPath
         ) {
             var path = [ROOT_ID].concat(
@@ -81,14 +84,22 @@ define(
             // Callback for updating the in-scope reference to the object
             // that is currently navigated-to.
             function setNavigation(domainObject) {
+                var navigationAllowed = true;
+
                 if (domainObject === $scope.navigatedObject){
                     //do nothing;
                     return;
                 }
 
-                if (navigationService.setNavigation(domainObject)) {
+                policyService.allow("navigation", $scope.navigatedObject, domainObject, function(message){
+                    navigationAllowed = $window.confirm(message + "\r\n\r\n" +
+                        " Are you sure you want to continue?");
+                });
+
+                if (navigationAllowed) {
                     $scope.navigatedObject = domainObject;
                     $scope.treeModel.selectedObject = domainObject;
+                    navigationService.setNavigation(domainObject);
                     updateRoute(domainObject);
                 } else {
                     //If navigation was unsuccessful (ie. blocked), reset

platform/commonUI/browse/src/navigation/NavigationService.js

@@ -37,7 +37,7 @@ define(
          */
         function NavigationService() {
             this.navigated = undefined;
-            this.callbacks = {};
+            this.callbacks = [];
         }
 
         /**
@@ -50,48 +50,27 @@ define(
 
         /**
          * Set the current navigation state. This will invoke listeners.
-         * Changing the navigation state will be blocked if any of the
-         * 'before' navigation state change listeners return 'false'.
          * @param {DomainObject} domainObject the domain object to navigate to
          */
         NavigationService.prototype.setNavigation = function (value) {
-            var canNavigate = true;
             if (this.navigated !== value) {
-                canNavigate = (this.callbacks.before || [])
+                this.navigated = value;
-                    .reduce(function (previous, callback) {
+                this.callbacks.forEach(function (callback) {
-                        //Check whether the callback returned a value of
+                    callback(value);
-                        // 'false' indicating that navigation should not
+                });
-                        // continue. All other return values will allow
-                        // navigation to continue
-                        return (callback(value)!==false) && previous;
-                    }, true);
-                if (canNavigate) {
-                    this.navigated = value;
-                    (this.callbacks.after || []).forEach(function (callback) {
-                        callback(value);
-                    });
-                }
             }
-            return canNavigate;
+            return true;
         };
 
         /**
          * Listen for changes in navigation. The passed callback will
          * be invoked with the new domain object of navigation when
-         * this changes. Callbacks can be registered to listen to pre or
+         * this changes.
-         * post-navigation events. The event to listen to is specified using
-         * the event parameter. In the case of pre-navigation events
-         * returning a false value will prevent the navigation event from
-         * going ahead.
          * @param {function} callback the callback to invoke when
          *        navigation state changes
-         * @param {string} [event=after] the navigation event to listen to.
-         * One of 'before' or 'after'.
          */
-        NavigationService.prototype.addListener = function (callback, event) {
+        NavigationService.prototype.addListener = function (callback) {
-            event = event || 'after';
+            this.callbacks.push(callback);
-            this.callbacks[event] = this.callbacks[event] || [];
-            this.callbacks[event].push(callback);
         };
 
         /**
@@ -99,12 +78,9 @@ define(
          * @param {function} callback the callback which should
          *        no longer be invoked when navigation state
          *        changes
-         * @param {string} [event=after] the navigation event that the
-         * callback is registered to. One of 'before' or 'after'.
          */
-        NavigationService.prototype.removeListener = function (callback, event) {
+        NavigationService.prototype.removeListener = function (callback) {
-            event = event || 'after';
+            this.callbacks = this.callbacks.filter(function (cb) {
-            this.callbacks[event] = this.callbacks[event].filter(function (cb) {
                 return cb !== callback;
             });
         };

platform/commonUI/browse/test/BrowseControllerSpec.js

@@ -39,6 +39,8 @@ define(
                 mockUrlService,
                 mockDomainObject,
                 mockNextObject,
+                mockWindow,
+                mockPolicyService,
                 testDefaultRoot,
                 controller;
 
@@ -55,14 +57,25 @@ define(
                     mockScope,
                     mockRoute,
                     mockLocation,
+                    mockWindow,
                     mockObjectService,
                     mockNavigationService,
                     mockUrlService,
+                    mockPolicyService,
                     testDefaultRoot
                 );
             }
 
             beforeEach(function () {
+                mockWindow = jasmine.createSpyObj('$window', [
+                   "confirm"
+                ]);
+                mockWindow.confirm.andReturn(true);
+
+                mockPolicyService = jasmine.createSpyObj('policyService', [
+                    'allow'
+                ]);
+
                 testDefaultRoot = "some-root-level-domain-object";
 
                 mockScope = jasmine.createSpyObj(

platform/commonUI/browse/test/navigation/NavigationServiceSpec.js

@@ -84,24 +84,6 @@ define(
                 expect(callback).not.toHaveBeenCalled();
             });
 
-            it("adds listeners to the 'after' state by default", function(){
-                expect(navigationService.callbacks.after).toBeUndefined();
-                navigationService.addListener(function(){});
-                expect(navigationService.callbacks.after).toBeDefined();
-                expect(navigationService.callbacks.after.length).toBe(1);
-            });
-
-            it("allows navigationService events to be prevented", function(){
-                var callback = jasmine.createSpy("callback"),
-                    navigationResult;
-                callback.andReturn(false);
-                navigationService.addListener(callback, "before");
-                navigationResult = navigationService.setNavigation({});
-                expect(callback).toHaveBeenCalled();
-                expect(navigationResult).toBe(false);
-
-            });
-
         });
     }
 );

platform/commonUI/edit/bundle.js

@@ -34,6 +34,7 @@ define([
     "./src/actions/SaveAction",
     "./src/actions/CancelAction",
     "./src/policies/EditActionPolicy",
+    "./src/policies/EditNavigationPolicy",
     "./src/representers/EditRepresenter",
     "./src/representers/EditToolbarRepresenter",
     "text!./res/templates/library.html",
@@ -55,6 +56,7 @@ define([
     SaveAction,
     CancelAction,
     EditActionPolicy,
+    EditNavigationPolicy,
     EditRepresenter,
     EditToolbarRepresenter,
     libraryTemplate,
@@ -95,7 +97,8 @@ define([
                     "implementation": EditObjectController,
                     "depends": [
                         "$scope",
-                        "$location"
+                        "$location",
+                        "policyService"
                     ]
                 }
             ],
@@ -183,7 +186,16 @@ define([
                 {
                     "category": "action",
                     "implementation": EditActionPolicy
+                },
+                {
+                    "category": "navigation",
+                    "message": "There are unsaved changes.",
+                    "implementation": EditNavigationPolicy,
+                    "depends": [
+                        "$window"
+                    ]
                 }
+
             ],
             "templates": [
                 {

platform/commonUI/edit/src/capabilities/EditorCapability.js

@@ -124,7 +124,6 @@ define(
          */
         EditorCapability.prototype.cancel = function () {
             this.editableObject.getCapability("status").set("editing", false);
-            //TODO: Reset the cache as well here.
             this.cache.markClean();
             return resolvePromise(undefined);
         };

platform/commonUI/edit/src/controllers/EditObjectController.js

@@ -36,8 +36,9 @@ define(
          * @memberof platform/commonUI/edit
          * @constructor
          */
-        function EditObjectController($scope, $location) {
+        function EditObjectController($scope, $location, policyService) {
             this.scope = $scope;
+            this.policyService = policyService;
 
             var navigatedObject;
             function setViewForDomainObject(domainObject) {
@@ -73,16 +74,14 @@ define(
          */
         EditObjectController.prototype.getUnloadWarning = function () {
             var navigatedObject = this.scope.domainObject,
-                editorCapability = navigatedObject &&
+                policyMessage;
-                    navigatedObject.getCapability("editor"),
+
-                statusCapability = navigatedObject &&
+            this.policyService.allow("navigation", navigatedObject, undefined, function(message) {
-                    navigatedObject.getCapability("status"),
+               policyMessage = message;
-                hasChanges = statusCapability && statusCapability.get('editing')
+            });
-                    && editorCapability && editorCapability.dirty();
+
+            return policyMessage;
 
-            return hasChanges ?
-                "Unsaved changes will be lost if you leave this page." :
-                undefined;
         };
 
         return EditObjectController;

platform/commonUI/edit/src/directives/MCTBeforeUnload.js

@@ -35,7 +35,7 @@ define(
          * @constructor
          * @param $window the window
          */
-        function MCTBeforeUnload($window, navigationService) {
+        function MCTBeforeUnload($window) {
             var unloads = [],
                 oldBeforeUnload = $window.onbeforeunload;
 
@@ -57,7 +57,6 @@ define(
 
                 // Stop using this unload expression
                 function removeUnload() {
-                    navigationService.removeListener(checkNavigationEvent, "before");
                     unloads = unloads.filter(function (callback) {
                         return callback !== unload;
                     });
@@ -66,28 +65,17 @@ define(
                     }
                 }
 
-                function shouldAllowNavigation(){
+                // Show a dialog before allowing a location change
+                function checkLocationChange(event) {
                     // Get an unload message (if any)
                     var warning = unload();
                     // Prompt the user if there's an unload message
-                    return !warning || $window.confirm(warning);
+                    if (warning && !$window.confirm(warning)) {
-                }
+                        // ...and prevent the route change if it was confirmed
-
-                // Show a dialog before allowing a location change
-                function checkLocationChange(event) {
-                    if (!shouldAllowNavigation()) {
-                        // Prevent the route change if it was confirmed
                         event.preventDefault();
                     }
                 }
 
-                // Show a dialog before allowing a location change
-                function checkNavigationEvent(event) {
-                    // Return a false value to the navigationService to
-                    // indicate that the navigation event should be prevented
-                    return shouldAllowNavigation();
-                }
-
                 // If this is the first active instance of this directive,
                 // register as the window's beforeunload handler
                 if (unloads.length === 0) {
@@ -102,8 +90,6 @@ define(
 
                 // Also handle route changes
                 scope.$on("$locationChangeStart", checkLocationChange);
-
-                navigationService.addListener(checkNavigationEvent, "before");
             }
 
             return {

platform/commonUI/edit/src/policies/EditNavigationPolicy.js

@@ -0,0 +1,68 @@
+/*****************************************************************************
+ * Open MCT Web, Copyright (c) 2014-2015, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT Web is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT Web includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+/*global define*/
+
+define(
+    [],
+    function () {
+        "use strict";
+
+        /**
+         * Policy controlling whether navigation events should proceed
+         * when object is being edited.
+         * @memberof platform/commonUI/edit
+         * @constructor
+         * @implements {Policy.<Action, ActionContext>}
+         */
+        function EditNavigationPolicy($window, policyService) {
+            this.window = $window;
+            this.policyService = policyService;
+        }
+
+        /**
+         * @private
+         */
+        EditNavigationPolicy.prototype.isDirty = function(domainObject) {
+            var navigatedObject = domainObject,
+                editorCapability = navigatedObject &&
+                    navigatedObject.getCapability("editor"),
+                statusCapability = navigatedObject &&
+                    navigatedObject.getCapability("status");
+
+            return statusCapability && statusCapability.get('editing')
+                && editorCapability && editorCapability.dirty();
+        };
+
+        /**
+         * Allow navigation if an object is not dirty, or if the user elects
+         * to proceed anyway.
+         * @param currentNavigation
+         * @returns {boolean|*} true if the object model is clean; or if
+         * it's dirty and the user wishes to proceed anyway.
+         */
+        EditNavigationPolicy.prototype.allow = function (currentNavigation) {
+            return !this.isDirty(currentNavigation);
+        };
+
+        return EditNavigationPolicy;
+    }
+);

platform/commonUI/edit/src/representers/EditRepresenter.js

@@ -147,7 +147,6 @@ define(
 
         // Respond to the destruction of the current representation.
         EditRepresenter.prototype.destroy = function destroy() {
-            // Nothing to clean up
             return this.listenHandle && this.listenHandle();
         };
 

platform/commonUI/edit/test/controllers/EditControllerSpec.js

@@ -33,6 +33,7 @@ define(
                 mockLocation,
                 mockStatusCapability,
                 mockCapabilities,
+                mockPolicyService,
                 controller;
 
             // Utility function; look for a $watch on scope and fire it
@@ -45,6 +46,12 @@ define(
             }
 
             beforeEach(function () {
+                mockPolicyService = jasmine.createSpyObj(
+                    "policyService",
+                    [
+                        "allow"
+                    ]
+                );
                 mockScope = jasmine.createSpyObj(
                     "$scope",
                     [ "$on", "$watch" ]

platform/representation/src/gestures/DropGesture.js

@@ -128,8 +128,7 @@ define(
                 var typeKey = 'telemetry.panel',
                     type = typeService.getType(typeKey),
                     model = type.getInitialModel(),
-                    newPanel,
+                    newPanel;
-                    composeAction;
 
                 model.type = typeKey;
                 newPanel = new EditableDomainObject(instantiate(model), $q);
@@ -166,16 +165,12 @@ define(
                         editableDomainObject = createVirtualPanel(domainObject, selectedObject);
                         if (editableDomainObject) {
                             editableDomainObject.getCapability('action').perform('edit');
-                            //navigationService.setNavigation(editableDomainObject);
                             broadcastDrop(id, event);
-                            //editableDomainObject.getCapability('status').set('editing', true);
                         }
                     } else {
                         $q.when(action && action.perform()).then(function (result) {
                             //Don't go into edit mode for folders
                             if (domainObjectType!=='folder') {
-                               // navigationService.setNavigation(editableDomainObject);
-                                //editableDomainObject.getCapability('status').set('editing', true);
                                 editableDomainObject.getCapability('action').perform('edit');
                             }
                             broadcastDrop(id, event);