It is time.

ui/wm/public/activation_client.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_WM_PUBLIC_ACTIVATION_CLIENT_H_
-#define UI_WM_PUBLIC_ACTIVATION_CLIENT_H_
-
-#include "ui/aura/aura_export.h"
-
-namespace ui {
-class Event;
-}
-
-namespace aura {
-class Window;
-
-namespace client {
-class ActivationChangeObserver;
-
-// An interface implemented by an object that manages window activation.
-class AURA_EXPORT ActivationClient {
- public:
-  // Adds/Removes ActivationChangeObservers.
-  virtual void AddObserver(ActivationChangeObserver* observer) = 0;
-  virtual void RemoveObserver(ActivationChangeObserver* observer) = 0;
-
-  // Activates |window|. If |window| is NULL, nothing happens.
-  virtual void ActivateWindow(Window* window) = 0;
-
-  // Deactivates |window|. What (if anything) is activated next is up to the
-  // client. If |window| is NULL, nothing happens.
-  virtual void DeactivateWindow(Window* window) = 0;
-
-  // Retrieves the active window, or NULL if there is none.
-  virtual Window* GetActiveWindow() = 0;
-
-  // Retrieves the activatable window for |window|, or NULL if there is none.
-  // Note that this is often but not always the toplevel window (see
-  // GetToplevelWindow() below), as the toplevel window may not be activatable
-  // (for example it may be blocked by a modal transient, or some other
-  // condition).
-  virtual Window* GetActivatableWindow(Window* window) = 0;
-
-  // Retrieves the toplevel window for |window|, or NULL if there is none.
-  virtual Window* GetToplevelWindow(Window* window) = 0;
-
-  // Returns true if |window| can be activated, false otherwise. If |window| has
-  // a modal child it can not be activated.
-  virtual bool CanActivateWindow(Window* window) const = 0;
-
- protected:
-  virtual ~ActivationClient() {}
-};
-
-// Sets/Gets the activation client on the root Window.
-AURA_EXPORT void SetActivationClient(Window* root_window,
-                                     ActivationClient* client);
-AURA_EXPORT ActivationClient* GetActivationClient(Window* root_window);
-
-// Some types of transient window are only visible when active.
-// The transient parents of these windows may have visual appearance properties
-// that differ from transient parents that can be deactivated.
-// The presence of this property implies these traits.
-// TODO(beng): currently the UI framework (views) implements the actual
-//             close-on-deactivate component of this feature but it should be
-//             possible to implement in the aura client.
-AURA_EXPORT void SetHideOnDeactivate(Window* window, bool hide_on_deactivate);
-AURA_EXPORT bool GetHideOnDeactivate(Window* window);
-
-}  // namespace clients
-}  // namespace aura
-
-#endif  // UI_WM_PUBLIC_ACTIVATION_CLIENT_H_