refactor(routing): make more field private & final, add return types

lib/routing/module.dart

@@ -141,8 +141,7 @@ class RoutingModule extends Module {
     bind(NgRoutingUsePushState);
     bind(Router, toFactory: (injector) {
       var useFragment = !injector.get(NgRoutingUsePushState).usePushState;
-      return new Router(useFragment: useFragment,
-                        windowImpl: injector.get(Window));
+      return new Router(useFragment: useFragment, windowImpl: injector.get(Window));
     });
     bind(NgRoutingHelper);
     bind(RouteProvider, toValue: null);

lib/routing/ng_bind_route.dart

@@ -27,14 +27,15 @@ part of angular.routing;
     module: NgBindRoute.module,
     map: const {'ng-bind-route': '@routeName'})
 class NgBindRoute implements RouteProvider {
-  Router _router;
   String routeName;
-  Injector _injector;
+  final Router _router;
+  final Injector _injector;
 
   static final Module _module = new Module()
       ..bind(RouteProvider, toFactory: (i) => i.get(NgBindRoute),
              visibility: Directive.CHILDREN_VISIBILITY);
-  static module() => _module;
+
+  static Module module() => _module;
 
   // We inject NgRoutingHelper to force initialization of routing.
   NgBindRoute(this._router, this._injector, NgRoutingHelper _);

lib/routing/ng_view.dart

@@ -53,48 +53,46 @@ part of angular.routing;
  */
 @Decorator(
     selector: 'ng-view',
-    module: NgView.module,
-    visibility: Directive.CHILDREN_VISIBILITY)
+    module: NgView.module)
 class NgView implements DetachAware, RouteProvider {
   static final Module _module = new Module()
       ..bind(RouteProvider, toFactory: (i) => i.get(NgView));
-  static module() => _module;
 
-  final NgRoutingHelper locationService;
-  final ViewCache viewCache;
-  final Injector injector;
-  final Element element;
-  final Scope scope;
+  static Module module() => _module;
+
+  final NgRoutingHelper _locationService;
+  final ViewCache _viewCache;
+  final Injector _injector;
+  final Element _element;
+  final Scope _scope;
   RouteHandle _route;
 
   View _view;
-  Scope _scope;
+  Scope _childScope;
   Route _viewRoute;
 
-  NgView(this.element, this.viewCache,
-                  Injector injector, Router router,
-                  this.scope)
-      : injector = injector,
-        locationService = injector.get(NgRoutingHelper)
+  NgView(this._element, this._viewCache, Injector injector, Router router, this._scope)
+      : _injector = injector,
+        _locationService = injector.get(NgRoutingHelper)
   {
     RouteProvider routeProvider = injector.parent.get(NgView);
     _route = routeProvider != null ?
         routeProvider.route.newHandle() :
         router.root.newHandle();
-    locationService._registerPortal(this);
+    _locationService._registerPortal(this);
     _maybeReloadViews();
   }
 
   void _maybeReloadViews() {
-    if (_route.isActive) locationService._reloadViews(startingFrom: _route);
+    if (_route.isActive) _locationService._reloadViews(startingFrom: _route);
   }
 
-  detach() {
+  void detach() {
     _route.discard();
-    locationService._unregisterPortal(this);
+    _locationService._unregisterPortal(this);
   }
 
-  _show(_View viewDef, Route route, List<Module> modules) {
+  void _show(_View viewDef, Route route, List<Module> modules) {
     assert(route.isActive);
 
     if (_viewRoute != null) return;
@@ -109,34 +107,36 @@ class NgView implements DetachAware, RouteProvider {
     });
 
     var viewInjector = modules == null ?
-        injector :
-        forceNewDirectivesAndFormatters(injector, modules);
+        _injector :
+        forceNewDirectivesAndFormatters(_injector, modules);
 
     var newDirectives = viewInjector.get(DirectiveMap);
     var viewFuture = viewDef.templateHtml != null ?
-        new Future.value(viewCache.fromHtml(viewDef.templateHtml, newDirectives)) :
-        viewCache.fromUrl(viewDef.template, newDirectives);
+        new Future.value(_viewCache.fromHtml(viewDef.templateHtml, newDirectives)) :
+        _viewCache.fromUrl(viewDef.template, newDirectives);
     viewFuture.then((viewFactory) {
       _cleanUp();
-      _scope = scope.createChild(new PrototypeMap(scope.context));
+      _childScope = _scope.createChild(new PrototypeMap(_scope.context));
       _view = viewFactory(
-          viewInjector.createChild([new Module()..bind(Scope, toValue: _scope)]));
-      _view.nodes.forEach((elm) => element.append(elm));
+          viewInjector.createChild([new Module()..bind(Scope, toValue: _childScope)]));
+      _view.nodes.forEach((elm) => _element.append(elm));
     });
   }
 
-  _cleanUp() {
+  void _cleanUp() {
     if (_view == null) return;
 
     _view.nodes.forEach((node) => node.remove());
-    _scope.destroy();
+    _childScope.destroy();
 
     _view = null;
-    _scope = null;
+    _childScope = null;
   }
 
   Route get route => _viewRoute;
+
   String get routeName => _viewRoute.name;
+
   Map<String, String> get parameters {
     var res = <String, String>{};
     var p = _viewRoute;

lib/routing/routing.dart

@@ -8,18 +8,20 @@ class RouteViewFactory {
 
   RouteViewFactory(this.locationService);
 
-  call(String templateUrl) =>
+  Function call(String templateUrl) =>
       (RouteEnterEvent event) => _enterHandler(event, templateUrl);
 
-  _enterHandler(RouteEnterEvent event, String templateUrl,
-                {List<Module> modules, String templateHtml}) =>
-      locationService._route(event.route, templateUrl, fromEvent: true,
-          modules: modules, templateHtml: templateHtml);
+  void _enterHandler(RouteEnterEvent event, String templateUrl,
+                     {List<Module> modules, String templateHtml}) {
+    locationService._route(event.route, templateUrl, fromEvent: true,
+        modules: modules, templateHtml: templateHtml);
+  }
 
-  configure(Map<String, NgRouteCfg> config) =>
-      _configure(locationService.router.root, config);
+  void configure(Map<String, NgRouteCfg> config) {
+    _configure(locationService.router.root, config);
+  }
 
-  _configure(Route route, Map<String, NgRouteCfg> config) {
+  void _configure(Route route, Map<String, NgRouteCfg> config) {
     config.forEach((name, cfg) {
       var modulesCalled = false;
       List<Module> newModules;
@@ -115,8 +117,8 @@ typedef void RouteInitializerFn(Router router, RouteViewFactory viewFactory);
 class NgRoutingHelper {
   final Router router;
   final Application _ngApp;
-  List<NgView> portals = <NgView>[];
-  Map<String, _View> _templates = new Map<String, _View>();
+  final _portals = <NgView>[];
+  final _templates = <String, _View>{};
 
   NgRoutingHelper(RouteInitializer initializer, Injector injector, this.router,
                   this._ngApp) {
@@ -136,7 +138,7 @@ class NgRoutingHelper {
     router.onRouteStart.listen((RouteStartEvent routeEvent) {
       routeEvent.completed.then((success) {
         if (success) {
-          portals.forEach((NgView p) => p._maybeReloadViews());
+          _portals.forEach((NgView p) => p._maybeReloadViews());
         }
       });
     });
@@ -155,7 +157,7 @@ class NgRoutingHelper {
       if (viewDef == null) continue;
       var templateUrl = viewDef.template;
 
-      NgView view = portals.lastWhere((NgView v) {
+      NgView view = _portals.lastWhere((NgView v) {
         return _routePath(route) != _routePath(v._route) &&
             _routePath(route).startsWith(_routePath(v._route));
       }, orElse: () => null);
@@ -173,11 +175,11 @@ class NgRoutingHelper {
   }
 
   void _registerPortal(NgView ngView) {
-    portals.add(ngView);
+    _portals.add(ngView);
   }
 
   void _unregisterPortal(NgView ngView) {
-    portals.remove(ngView);
+    _portals.remove(ngView);
   }
 }
 
@@ -190,7 +192,7 @@ class _View {
 }
 
 String _routePath(Route route) {
-  var path = [];
+  final path = [];
   var p = route;
   while (p.parent != null) {
     path.insert(0, p.name);