| // Copyright 2016 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_MUS_CAPTURE_SYNCHRONIZER_H_ |
| #define UI_AURA_MUS_CAPTURE_SYNCHRONIZER_H_ |
| |
| #include <stdint.h> |
| |
| #include "base/macros.h" |
| #include "ui/aura/aura_export.h" |
| #include "ui/aura/client/capture_client_observer.h" |
| #include "ui/aura/window_observer.h" |
| |
| namespace ws { |
| namespace mojom { |
| class WindowTree; |
| } |
| } |
| |
| namespace aura { |
| class CaptureSynchronizerDelegate; |
| class WindowMus; |
| |
| namespace client { |
| class CaptureClient; |
| } |
| |
| // CaptureSynchronizer is resonsible for keeping capture in sync between aura |
| // and the mus server. |
| class AURA_EXPORT CaptureSynchronizer : public WindowObserver, |
| public client::CaptureClientObserver { |
| public: |
| CaptureSynchronizer(CaptureSynchronizerDelegate* delegate, |
| ws::mojom::WindowTree* window_tree); |
| ~CaptureSynchronizer() override; |
| |
| WindowMus* capture_window() { return capture_window_; } |
| |
| // Called when the server side wants to change capture to |window|. |
| void SetCaptureFromServer(WindowMus* window); |
| |
| // Called when the |capture_client| has been set or will be unset. |
| void AttachToCaptureClient(client::CaptureClient* capture_client); |
| void DetachFromCaptureClient(client::CaptureClient* capture_client); |
| |
| private: |
| // Internal implementation for capture changes. Adds/removes observer as |
| // necessary and sets |capture_window_| to |window|. |
| void SetCaptureWindow(WindowMus* window); |
| |
| // WindowObserver: |
| void OnWindowDestroying(Window* window) override; |
| |
| // client::CaptureClientObserver: |
| void OnCaptureChanged(Window* lost_capture, Window* gained_capture) override; |
| |
| CaptureSynchronizerDelegate* delegate_; |
| ws::mojom::WindowTree* window_tree_; |
| |
| // Window that currently has capture. |
| WindowMus* capture_window_ = nullptr; |
| |
| // Used when setting capture from the server to avoid setting capture back |
| // on the server. If |setting_capture_| is true SetCaptureFromServer() was |
| // called and |window_setting_capture_to_| is the window capture is being |
| // set on. |
| bool setting_capture_ = false; |
| WindowMus* window_setting_capture_to_ = nullptr; |
| |
| DISALLOW_COPY_AND_ASSIGN(CaptureSynchronizer); |
| }; |
| |
| } // namespace aura |
| |
| #endif // UI_AURA_MUS_CAPTURE_SYNCHRONIZER_H_ |