First cut at supporting activation in the window manager

mojo/examples/wm_flow/wm/wm.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 <vector>
+
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/examples/wm_flow/wm/frame_controller.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/public/cpp/application/service_provider_impl.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/window_manager_delegate.h"
 #include "mojo/services/public/interfaces/input_events/input_events.mojom.h"
 #include "mojo/services/window_manager/window_manager_app.h"
 #include "mojo/views/views_init.h"
+#include "ui/aura/window.h"
+#include "ui/wm/core/focus_rules.h"
+#include "ui/wm/public/activation_client.h"
 
 namespace examples {
 
+namespace {
+
+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 MOJO_OVERRIDE {
+    return mojo::WindowManagerApp::GetViewForWindow(window)->parent() ==
+        window_container_;
+  }
+  virtual bool CanActivateWindow(aura::Window* window) const MOJO_OVERRIDE {
+    return mojo::WindowManagerApp::GetViewForWindow(window)->parent() ==
+        window_container_;
+  }
+  virtual bool CanFocusWindow(aura::Window* window) const MOJO_OVERRIDE {
+    return true;
+  }
+  virtual aura::Window* GetToplevelWindow(
+      aura::Window* window) const MOJO_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 MOJO_OVERRIDE {
+    return GetToplevelWindow(window);
+  }
+  virtual aura::Window* GetFocusableWindow(
+      aura::Window* window) const MOJO_OVERRIDE {
+    return window;
+  }
+  virtual aura::Window* GetNextActivatableWindow(
+      aura::Window* ignore) const MOJO_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 SimpleWM : public mojo::ApplicationDelegate,
                  public mojo::ViewManagerDelegate,
                  public mojo::WindowManagerDelegate,
                  public mojo::ViewObserver {
  public:
   SimpleWM()
       : window_manager_app_(new mojo::WindowManagerApp(this, this)),
         view_manager_(NULL),
         root_(NULL),
         window_container_(NULL),
@@ skipping 17 matching lines @@
       mojo::View* root,
       mojo::ServiceProviderImpl* exported_services,
       scoped_ptr<mojo::ServiceProvider> remote_service_provider) MOJO_OVERRIDE {
     view_manager_ = view_manager;
     root_ = root;
 
     window_container_ = mojo::View::Create(view_manager_);
     window_container_->SetBounds(root_->bounds());
     root_->AddChild(window_container_);
 
+    window_manager_app_->InitFocus(new WMFocusRules(window_manager_app_.get(),
+                                                    window_container_));
   }
   virtual void OnViewManagerDisconnected(
       mojo::ViewManager* view_manager) MOJO_OVERRIDE {
     view_manager_ = NULL;
     root_ = NULL;
   }
 
   // Overridden from mojo::WindowManagerDelegate:
   virtual void Embed(
       const mojo::String& url,
@@ skipping 30 matching lines @@
     first_child->Destroy();
     view->Destroy();
     next_window_origin_.Offset(-50, -50);
   }
 
   mojo::View* CreateTopLevelWindow(mojo::View** app_view) {
     mojo::View* frame_view = mojo::View::Create(view_manager_);
     frame_view->SetBounds(gfx::Rect(next_window_origin_, gfx::Size(400, 400)));
     next_window_origin_.Offset(50, 50);
 
-    new FrameController(frame_view, app_view);
+    aura::client::ActivationClient* client = aura::client::GetActivationClient(
+        window_manager_app_->host()->window());
+    new FrameController(frame_view, app_view, client,
+                        window_manager_app_.get());
     return frame_view;
   }
 
   scoped_ptr<mojo::WindowManagerApp> window_manager_app_;
 
   mojo::ViewManager* view_manager_;
   mojo::View* root_;
   mojo::View* window_container_;
 
   gfx::Point next_window_origin_;
 
   DISALLOW_COPY_AND_ASSIGN(SimpleWM);
 };
 
 }  // namespace examples
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ViewsInit views_init;
   mojo::ApplicationRunnerChromium runner(new examples::SimpleWM);
   return runner.Run(shell_handle);
 }