ui/aura/client/default_activation_client.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_AURA_CLIENT_DEFAULT_ACTIVATION_CLIENT_H_
   6 #define UI_AURA_CLIENT_DEFAULT_ACTIVATION_CLIENT_H_
   7
   8 #include <vector>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/logging.h"
  12 #include "base/observer_list.h"
  13 #include "ui/aura/aura_export.h"
  14 #include "ui/aura/client/activation_client.h"
  15 #include "ui/aura/window_observer.h"
  16
  17 namespace aura {
  18 namespace client {
  19 class ActivationChangeObserver;
  20 }
  21
  22 namespace client {
  23
  24 // Simple ActivationClient implementation for use by tests and other targets
  25 // that just need basic behavior (e.g. activate windows whenever requested,
  26 // restack windows at the top when they're activated, etc.).
  27 class AURA_EXPORT DefaultActivationClient : public client::ActivationClient,
  28                                             public WindowObserver {
  29  public:
  30   explicit DefaultActivationClient(Window* root_window);
  31   virtual ~DefaultActivationClient();
  32
  33   // Overridden from client::ActivationClient:
  34   virtual void AddObserver(client::ActivationChangeObserver* observer) OVERRIDE;
  35   virtual void RemoveObserver(
  36       client::ActivationChangeObserver* observer) OVERRIDE;
  37   virtual void ActivateWindow(Window* window) OVERRIDE;
  38   virtual void DeactivateWindow(Window* window) OVERRIDE;
  39   virtual Window* GetActiveWindow() OVERRIDE;
  40   virtual Window* GetActivatableWindow(Window* window) OVERRIDE;
  41   virtual Window* GetToplevelWindow(Window* window) OVERRIDE;
  42   virtual bool OnWillFocusWindow(Window* window,
  43                                  const ui::Event* event) OVERRIDE;
  44   virtual bool CanActivateWindow(Window* window) const OVERRIDE;
  45
  46   // Overridden from WindowObserver:
  47   virtual void OnWindowDestroyed(Window* window) OVERRIDE;
  48
  49  private:
  50   void RemoveActiveWindow(Window* window);
  51
  52   // This class explicitly does NOT store the active window in a window property
  53   // to make sure that ActivationChangeObserver is not treated as part of the
  54   // aura API. Assumptions to that end will cause tests that use this client to
  55   // fail.
  56   std::vector<Window*> active_windows_;
  57
  58   // The window which was active before the currently active one.
  59   Window* last_active_;
  60
  61   ObserverList<client::ActivationChangeObserver> observers_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(DefaultActivationClient);
  64 };
  65
  66 }  // namespace client
  67 }  // namespace aura
  68
  69 #endif  // UI_AURA_CLIENT_DEFAULT_ACTIVATION_CLIENT_H_