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// 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 ui {
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,
ui::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_;
ui::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_
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