Introduce very beginning of navigation

mojo/examples/window_manager/window_manager.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/basictypes.h"
 #include "base/bind.h"
+#include "base/strings/stringprintf.h"
 #include "mojo/examples/window_manager/window_manager.mojom.h"
 #include "mojo/public/cpp/application/application.h"
+#include "mojo/services/navigation/navigation.mojom.h"
 #include "mojo/services/public/cpp/view_manager/view.h"
 #include "mojo/services/public/cpp/view_manager/view_manager.h"
 #include "mojo/services/public/cpp/view_manager/view_manager_delegate.h"
 #include "mojo/services/public/cpp/view_manager/view_observer.h"
 #include "mojo/services/public/cpp/view_manager/view_tree_node.h"
 #include "ui/events/event_constants.h"
 
 #if defined CreateWindow
 #undef CreateWindow
 #endif
 
 using mojo::view_manager::Id;
 using mojo::view_manager::View;
 using mojo::view_manager::ViewManager;
 using mojo::view_manager::ViewManagerDelegate;
 using mojo::view_manager::ViewObserver;
 using mojo::view_manager::ViewTreeNode;
 using mojo::view_manager::ViewTreeNodeObserver;
 
 namespace mojo {
 namespace examples {
 
 class WindowManager;
 
+namespace {
+
+const SkColor kColors[] = { SK_ColorYELLOW,
+                            SK_ColorRED,
+                            SK_ColorGREEN,
+                            SK_ColorMAGENTA };
+
+const char kEmbeddedAppURL[] = "mojo:mojo_embedded_app";
+const char kNestingAppURL[] = "mojo:mojo_nesting_app";
+const char kMojoBrowserURL[] = "mojo:mojo_browser";
+
+}  // namespace
+
 class WindowManagerConnection : public InterfaceImpl<IWindowManager> {
  public:
   explicit WindowManagerConnection(WindowManager* window_manager)
       : window_manager_(window_manager) {}
   virtual ~WindowManagerConnection() {}
 
  private:
   // Overridden from IWindowManager:
   virtual void CloseWindow(Id node_id) OVERRIDE;
 
@@ skipping 19 matching lines @@
   // Overridden from Application:
   virtual void Initialize() MOJO_OVERRIDE {
     AddService<WindowManagerConnection>(this);
     ViewManager::Create(this, this);
   }
 
     // Overridden from ViewObserver:
   virtual void OnViewInputEvent(View* view, const EventPtr& event) OVERRIDE {
     if (event->action == ui::ET_MOUSE_RELEASED) {
       if (event->flags & ui::EF_LEFT_MOUSE_BUTTON)
-        CreateWindow("mojo:mojo_embedded_app");
+        CreateWindow(kEmbeddedAppURL);
       else if (event->flags & ui::EF_RIGHT_MOUSE_BUTTON)
-        CreateWindow("mojo:mojo_nesting_app");
+        CreateWindow(kNestingAppURL);
       else if (event->flags & ui::EF_MIDDLE_MOUSE_BUTTON)
-        CreateWindow("mojo:mojo_browser");
+        CreateWindow(kMojoBrowserURL);
     }
   }
 
   // Overridden from ViewManagerDelegate:
   virtual void OnRootAdded(ViewManager* view_manager,
                            ViewTreeNode* root) OVERRIDE {
     DCHECK(!view_manager_);
     view_manager_ = view_manager;
 
     ViewTreeNode* node = ViewTreeNode::Create(view_manager);
     view_manager->GetRoots().front()->AddChild(node);
     node->SetBounds(gfx::Rect(800, 600));
     parent_node_id_ = node->id();
 
     View* view = View::Create(view_manager);
     node->SetActiveView(view);
     view->SetColor(SK_ColorBLUE);
     view->AddObserver(this);
   }
 
-  void CreateWindow(const String& url) {
+  void CreateWindow(const std::string& url) {
     ViewTreeNode* node = view_manager_->GetNodeById(parent_node_id_);
 
     gfx::Rect bounds(50, 50, 200, 200);
     if (!node->children().empty()) {
       gfx::Point position = node->children().back()->bounds().origin();
       position.Offset(50, 50);
       bounds.set_origin(position);
     }
 
     ViewTreeNode* embedded = ViewTreeNode::Create(view_manager_);
     node->AddChild(embedded);
     embedded->SetBounds(bounds);
     embedded->Embed(url);
+
+    // TODO(aa): Is there a way to ask for an interface and test whether it
+    // succeeded? That would be nicer than hard-coding the URLs that are known
+    // to support navigation.
+    if (url == kEmbeddedAppURL || url == kNestingAppURL) {
+      // TODO(aa): This means that there can only ever be one instance of every
+      // app, which seems wrong. Instead, perhaps embedder should get back a
+      // service provider that allows it to talk to embeddee.
+      navigation::NavigatorPtr navigator;
+      ConnectTo(url, &navigator);
+      navigation::NavigationDetailsPtr details(
+          navigation::NavigationDetails::New());
+      size_t index = node->children().size() - 1;
+      details->url = base::StringPrintf(
+          "%s/%x", kEmbeddedAppURL, kColors[index % arraysize(kColors)]);
+      navigator->Navigate(embedded->id(), details.Pass());
+    }
   }
 
   ViewManager* view_manager_;
   Id parent_node_id_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManager);
 };
 
 void WindowManagerConnection::CloseWindow(Id node_id) {
   window_manager_->CloseWindow(node_id);
 }
 
 }  // namespace examples
 
 // static
 Application* Application::Create() {
   return new examples::WindowManager;
 }
 
 }  // namespace mojo