InputManager/AcceleratorManager for athena

athena/input/input_manager_impl.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 "athena/input/public/input_manager.h"
+
+#include "athena/input/accelerator_manager_impl.h"
+#include "base/logging.h"
+#include "ui/aura/client/event_client.h"
+#include "ui/aura/env.h"
+#include "ui/events/event_target.h"
+
+namespace athena {
+namespace {
+
+InputManager* instance = NULL;
+
+class InputManagerImpl : public InputManager,
+                         public ui::EventTarget,
+                         public aura::client::EventClient {
+ public:
+  InputManagerImpl();
+  virtual ~InputManagerImpl();
+
+  void Init();
+  void Shutdown();
+
+ private:
+  // InputManager:
+  virtual void OnRootWindowCreated(aura::Window* root_window) OVERRIDE;
+  virtual ui::EventTarget* GetTopmostEventTarget() OVERRIDE { return this; }
+  virtual AcceleratorManager* GetAcceleratorManager() OVERRIDE {
+    return accelerator_manager_.get();
+  }
+
+  // Overridden from aura::client::EventClient:
+  virtual bool CanProcessEventsWithinSubtree(
+      const aura::Window* window) const OVERRIDE {
+    return true;
+  }
+  virtual ui::EventTarget* GetToplevelEventTarget() OVERRIDE { return this; }
+
+  // ui::EventTarget:
+  virtual bool CanAcceptEvent(const ui::Event& event) OVERRIDE;
+  virtual ui::EventTarget* GetParentTarget() OVERRIDE;
+  virtual scoped_ptr<ui::EventTargetIterator> GetChildIterator() const OVERRIDE;
+  virtual ui::EventTargeter* GetEventTargeter() OVERRIDE;
+  virtual void OnEvent(ui::Event* event) OVERRIDE;
+
+  scoped_ptr<AcceleratorManagerImpl> accelerator_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(InputManagerImpl);
+};
+
+InputManagerImpl::InputManagerImpl()
+    : accelerator_manager_(new AcceleratorManagerImpl) {
+  DCHECK(!instance);
+  instance = this;
+}
+
+InputManagerImpl::~InputManagerImpl() {
+  DCHECK_EQ(instance, this);
+  Shutdown();
+  instance = NULL;
+}
+
+void InputManagerImpl::Init() {
+  accelerator_manager_->Init();
+}
+
+void InputManagerImpl::Shutdown() {
+  accelerator_manager_.reset();
+}
+
+void InputManagerImpl::OnRootWindowCreated(aura::Window* root_window) {
+  aura::client::SetEventClient(root_window, this);
+  accelerator_manager_->OnRootWindowCreated(root_window);
+}
+
+bool InputManagerImpl::CanAcceptEvent(const ui::Event& event) {
+  return true;
+}
+
+ui::EventTarget* InputManagerImpl::GetParentTarget() {
+  return aura::Env::GetInstance();
+}
+
+scoped_ptr<ui::EventTargetIterator> InputManagerImpl::GetChildIterator() const {
+  return scoped_ptr<ui::EventTargetIterator>();
+}
+
+ui::EventTargeter* InputManagerImpl::GetEventTargeter() {
+  NOTREACHED();
+  return NULL;
+}
+
+void InputManagerImpl::OnEvent(ui::Event* event) {
+}
+
+}  // namespace
+
+// static
+InputManager* InputManager::Create() {
+  (new InputManagerImpl)->Init();
+  DCHECK(instance);
+  return instance;
+}
+
+// static
+InputManager* InputManager::Get() {
+  DCHECK(instance);
+  return instance;
+}
+
+// static
+void InputManager::Shutdown() {
+  DCHECK(instance);
+  delete instance;
+  DCHECK(!instance);
+}
+
+}  // namespace athena