| // 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_VIEWS_COREWM_CAPTURE_CONTROLLER_H_ |
| #define UI_VIEWS_COREWM_CAPTURE_CONTROLLER_H_ |
| |
| #include <set> |
| |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| #include "ui/aura/client/capture_client.h" |
| #include "ui/aura/window_observer.h" |
| #include "ui/views/views_export.h" |
| |
| namespace views { |
| namespace corewm { |
| |
| // Internal CaptureClient implementation. See ScopedCaptureClient for details. |
| class VIEWS_EXPORT CaptureController : public aura::client::CaptureClient { |
| public: |
| // Adds |root| to the list of RootWindows notified when capture changes. |
| void Attach(aura::Window* root); |
| |
| // Removes |root| from the list of RootWindows notified when capture changes. |
| void Detach(aura::Window* root); |
| |
| // Returns true if this CaptureController is installed on at least one |
| // RootWindow. |
| bool is_active() const { return !root_windows_.empty(); } |
| |
| // Overridden from aura::client::CaptureClient: |
| virtual void SetCapture(aura::Window* window) OVERRIDE; |
| virtual void ReleaseCapture(aura::Window* window) OVERRIDE; |
| virtual aura::Window* GetCaptureWindow() OVERRIDE; |
| virtual aura::Window* GetGlobalCaptureWindow() OVERRIDE; |
| |
| private: |
| friend class ScopedCaptureClient; |
| typedef std::set<aura::Window*> RootWindows; |
| |
| CaptureController(); |
| virtual ~CaptureController(); |
| |
| // The current capture window. NULL if there is no capture window. |
| aura::Window* capture_window_; |
| |
| // Set of RootWindows notified when capture changes. |
| RootWindows root_windows_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CaptureController); |
| }; |
| |
| // ScopedCaptureClient is responsible for creating a CaptureClient for a |
| // RootWindow. Specifically it creates a single CaptureController that is shared |
| // among all ScopedCaptureClients and adds the RootWindow to it. |
| class VIEWS_EXPORT ScopedCaptureClient : public aura::WindowObserver { |
| public: |
| explicit ScopedCaptureClient(aura::Window* root); |
| virtual ~ScopedCaptureClient(); |
| |
| // Returns true if there is a CaptureController with at least one RootWindow. |
| static bool IsActive(); |
| |
| aura::client::CaptureClient* capture_client() { |
| return capture_controller_; |
| } |
| |
| // Overridden from aura::WindowObserver: |
| virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE; |
| |
| private: |
| // Invoked from destructor and OnWindowDestroyed() to cleanup. |
| void Shutdown(); |
| |
| // The single CaptureController instance. |
| static CaptureController* capture_controller_; |
| |
| // RootWindow this ScopedCaptureClient was create for. |
| aura::Window* root_window_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedCaptureClient); |
| }; |
| |
| } // namespace corewm |
| } // namespace views |
| |
| #endif // UI_VIEWS_COREWM_CAPTURE_CONTROLLER_H_ |