Make a pure mojo::View version of the aura::Window FocusController.

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/bind.h"
 #include "base/macros.h"
 #include "examples/keyboard/keyboard.mojom.h"
 #include "examples/window_manager/debug_panel.h"
 #include "examples/window_manager/window_manager.mojom.h"
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/input_events/input_events_type_converters.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_connection.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/public/cpp/application/interface_factory_impl.h"
 #include "mojo/public/cpp/application/service_provider_impl.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/interfaces/input_events/input_events.mojom.h"
 #include "mojo/services/public/interfaces/navigation/navigation.mojom.h"
+#include "mojo/services/window_manager/basic_focus_rules.h"
+#include "mojo/services/window_manager/view_target.h"
 #include "mojo/services/window_manager/window_manager_app.h"
 #include "mojo/services/window_manager/window_manager_delegate.h"
 #include "mojo/views/views_init.h"
-#include "ui/aura/window.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/gfx/geometry/size_conversions.h"
-#include "ui/wm/core/focus_rules.h"
 
 #if defined CreateWindow
 #undef CreateWindow
 #endif
 
 namespace mojo {
 namespace examples {
 
 class WindowManager;
 
 namespace {
 
 const int kBorderInset = 25;
 const int kControlPanelWidth = 200;
 const int kTextfieldHeight = 25;
 
-class WMFocusRules : public wm::FocusRules {
- public:
-  WMFocusRules(mojo::WindowManagerApp* window_manager_app,
-               mojo::View* window_container)
-      : window_container_(window_container),
-        window_manager_app_(window_manager_app) {}
-  virtual ~WMFocusRules() {}
-
- private:
-  // Overridden from wm::FocusRules:
-  virtual bool IsToplevelWindow(aura::Window* window) const override {
-    return mojo::WindowManagerApp::GetViewForWindow(window)->parent() ==
-        window_container_;
-  }
-  virtual bool CanActivateWindow(aura::Window* window) const override {
-    return mojo::WindowManagerApp::GetViewForWindow(window)->parent() ==
-        window_container_;
-  }
-  virtual bool CanFocusWindow(aura::Window* window) const override {
-    return true;
-  }
-  virtual aura::Window* GetToplevelWindow(aura::Window* window) const override {
-    mojo::View* view = mojo::WindowManagerApp::GetViewForWindow(window);
-    while (view->parent() != window_container_) {
-      view = view->parent();
-      // Unparented hierarchy, there is no "top level" window.
-      if (!view)
-        return NULL;
-    }
-
-    return window_manager_app_->GetWindowForViewId(view->id());
-  }
-  virtual aura::Window* GetActivatableWindow(
-      aura::Window* window) const override {
-    return GetToplevelWindow(window);
-  }
-  virtual aura::Window* GetFocusableWindow(
-      aura::Window* window) const override {
-    return window;
-  }
-  virtual aura::Window* GetNextActivatableWindow(
-      aura::Window* ignore) const override {
-    aura::Window* activatable = GetActivatableWindow(ignore);
-    const aura::Window::Windows& children = activatable->parent()->children();
-    for (aura::Window::Windows::const_reverse_iterator it = children.rbegin();
-         it != children.rend(); ++it) {
-      if (*it != ignore)
-        return *it;
-    }
-    return NULL;
-  }
-
-  mojo::View* window_container_;
-  mojo::WindowManagerApp* window_manager_app_;
-
-  DISALLOW_COPY_AND_ASSIGN(WMFocusRules);
-};
-
 }  // namespace
 
 class WindowManagerConnection : public InterfaceImpl<IWindowManager> {
  public:
   explicit WindowManagerConnection(WindowManager* window_manager)
       : window_manager_(window_manager) {}
   virtual ~WindowManagerConnection() {}
 
  private:
   // Overridden from IWindowManager:
@@ skipping 204 matching lines @@
       : shell_(nullptr),
         window_manager_factory_(this),
         launcher_ui_(NULL),
         view_manager_(NULL),
         window_manager_app_(new WindowManagerApp(this, this)),
         app_(NULL) {}
 
   virtual ~WindowManager() {
     // host() may be destroyed by the time we get here.
     // TODO: figure out a way to always cleanly remove handler.
-    if (window_manager_app_->host())
-      window_manager_app_->host()->window()->RemovePreTargetHandler(this);
+
+    // TODO(erg): In the aura version, we removed ourselves from the
+    // PreTargetHandler list here. We may need to do something analogous when
+    // we get event handling without aura working.
   }
 
   void CloseWindow(Id view_id) {
     WindowVector::iterator iter = GetWindowByViewId(view_id);
     DCHECK(iter != windows_.end());
     Window* window = *iter;
     windows_.erase(iter);
     window->view()->Destroy();
   }
 
@@ skipping 78 matching lines @@
     Id launcher_ui_id = CreateLauncherUI();
     Id control_panel_id = CreateControlPanel(view);
 
     root_layout_manager_.reset(
         new RootLayoutManager(view_manager, root,
                               content_view_id_,
                               launcher_ui_id,
                               control_panel_id));
     root->AddObserver(root_layout_manager_.get());
 
-    window_manager_app_->host()->window()->AddPreTargetHandler(this);
+    // TODO(erg): In the aura version, we explicitly added ourselves as a
+    // PreTargetHandler to the window() here. We probably have to do something
+    // analogous here.
 
-    window_manager_app_->InitFocus(new WMFocusRules(window_manager_app_.get(),
-                                                    view));
+    window_manager_app_->InitFocus(scoped_ptr<mojo::FocusRules>(
+        new mojo::BasicFocusRules(window_manager_app_.get(),
+                                  view)));
   }
   virtual void OnViewManagerDisconnected(ViewManager* view_manager) override {
     DCHECK_EQ(view_manager_, view_manager);
     view_manager_ = NULL;
     base::MessageLoop::current()->Quit();
   }
 
   // Overridden from WindowManagerDelegate:
   virtual void Embed(
       const String& url,
       InterfaceRequest<ServiceProvider> service_provider) override {
     const Id kInvalidSourceViewId = 0;
     OnLaunch(kInvalidSourceViewId, TARGET_DEFAULT, url);
   }
 
   // Overridden from ui::EventHandler:
   virtual void OnEvent(ui::Event* event) override {
-    View* view = WindowManagerApp::GetViewForWindow(
-        static_cast<aura::Window*>(event->target()));
+    View* view = WindowManagerApp::GetViewForViewTarget(
+        static_cast<ViewTarget*>(event->target()));
     if (event->type() == ui::ET_MOUSE_PRESSED &&
         !IsDescendantOfKeyboard(view)) {
       view->SetFocus();
     }
   }
 
   void OnLaunch(uint32 source_view_id,
                 Target requested_target,
                 const mojo::String& url) {
     Target target = debug_panel_->navigation_target();
@@ skipping 137 matching lines @@
   window_manager_->RequestNavigate(view_id_, target, request.Pass());
 }
 
 }  // namespace examples
 }  // namespace mojo
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(new mojo::examples::WindowManager);
   return runner.Run(shell_handle);
 }