It is time.

ui/aura/env.h

-// Copyright (c) 2012 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.
-
-#ifndef UI_AURA_ENV_H_
-#define UI_AURA_ENV_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "base/observer_list.h"
-#include "base/supports_user_data.h"
-#include "ui/aura/aura_export.h"
-#include "ui/events/event_handler.h"
-#include "ui/events/event_target.h"
-#include "ui/gfx/point.h"
-
-namespace ui {
-class ContextFactory;
-class PlatformEventSource;
-}
-namespace aura {
-
-namespace test {
-class EnvTestHelper;
-}
-
-class EnvObserver;
-class InputStateLookup;
-class Window;
-class WindowTreeHost;
-
-// A singleton object that tracks general state within Aura.
-class AURA_EXPORT Env : public ui::EventTarget, public base::SupportsUserData {
- public:
-  // Creates the single Env instance (if it hasn't been created yet). If
-  // |create_event_source| is true a PlatformEventSource is created.
-  // TODO(sky): nuke |create_event_source|. Only necessary while mojo's
-  // nativeviewportservice lives in the same process as the viewmanager.
-  static void CreateInstance(bool create_event_source);
-  static Env* GetInstance();
-  static void DeleteInstance();
-
-  void AddObserver(EnvObserver* observer);
-  void RemoveObserver(EnvObserver* observer);
-
-  int mouse_button_flags() const { return mouse_button_flags_; }
-  void set_mouse_button_flags(int mouse_button_flags) {
-    mouse_button_flags_ = mouse_button_flags;
-  }
-  // Returns true if a mouse button is down. This may query the native OS,
-  // otherwise it uses |mouse_button_flags_|.
-  bool IsMouseButtonDown() const;
-
-  // Gets/sets the last mouse location seen in a mouse event in the screen
-  // coordinates.
-  const gfx::Point& last_mouse_location() const { return last_mouse_location_; }
-  void set_last_mouse_location(const gfx::Point& last_mouse_location) {
-    last_mouse_location_ = last_mouse_location;
-  }
-
-  // Whether any touch device is currently down.
-  bool is_touch_down() const { return is_touch_down_; }
-  void set_touch_down(bool value) { is_touch_down_ = value; }
-
-  void set_context_factory(ui::ContextFactory* context_factory) {
-    context_factory_ = context_factory;
-  }
-  ui::ContextFactory* context_factory() { return context_factory_; }
-
- private:
-  friend class test::EnvTestHelper;
-  friend class Window;
-  friend class WindowTreeHost;
-
-  Env();
-  virtual ~Env();
-
-  // See description of CreateInstance() for deatils of |create_event_source|.
-  void Init(bool create_event_source);
-
-  // Called by the Window when it is initialized. Notifies observers.
-  void NotifyWindowInitialized(Window* window);
-
-  // Called by the WindowTreeHost when it is initialized. Notifies observers.
-  void NotifyHostInitialized(WindowTreeHost* host);
-
-  // Invoked by WindowTreeHost when it is activated. Notifies observers.
-  void NotifyHostActivated(WindowTreeHost* host);
-
-  // Overridden from ui::EventTarget:
-  virtual bool CanAcceptEvent(const ui::Event& event) override;
-  virtual ui::EventTarget* GetParentTarget() override;
-  virtual scoped_ptr<ui::EventTargetIterator> GetChildIterator() override;
-  virtual ui::EventTargeter* GetEventTargeter() override;
-
-  ObserverList<EnvObserver> observers_;
-
-  int mouse_button_flags_;
-  // Location of last mouse event, in screen coordinates.
-  gfx::Point last_mouse_location_;
-  bool is_touch_down_;
-
-  scoped_ptr<InputStateLookup> input_state_lookup_;
-  scoped_ptr<ui::PlatformEventSource> event_source_;
-
-  ui::ContextFactory* context_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(Env);
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_ENV_H_