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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_REMOTE_COCOA_BROWSER_SCOPED_CG_WINDOW_ID_H_
#define COMPONENTS_REMOTE_COCOA_BROWSER_SCOPED_CG_WINDOW_ID_H_
#include <stdint.h>
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/threading/thread_checker.h"
#include "components/remote_cocoa/browser/remote_cocoa_browser_export.h"
#include "components/viz/common/surfaces/frame_sink_id.h"
#include "ui/gfx/geometry/point_f.h"
#include "ui/gfx/geometry/size.h"
namespace remote_cocoa {
// A registry of the CGWindowIDs for the remote cocoa windows created in any
// process (the browser and also the renderer). This can be used to look up
// the compositing frame sink id for efficient video capture. This class may
// only be accessed on the UI thread.
class REMOTE_COCOA_BROWSER_EXPORT ScopedCGWindowID final {
public:
class Observer : public base::CheckedObserver {
public:
// This is invoked in the ScopedCGWindowID destructor, after all of its
// weak pointers have been destroyed.
virtual void OnScopedCGWindowIDDestroyed(uint32_t cg_window_id) {}
virtual void OnScopedCGWindowIDMouseMoved(
uint32_t cg_window_id,
const gfx::PointF& location_in_window_dips,
const gfx::Size& window_size_dips) {}
};
ScopedCGWindowID(uint32_t cg_window_id,
const viz::FrameSinkId& frame_sink_id);
~ScopedCGWindowID();
ScopedCGWindowID(const ScopedCGWindowID&) = delete;
ScopedCGWindowID& operator=(const ScopedCGWindowID&) = delete;
// Add and remove an observer. This class will automatically remove all
// observers after invalidating its weak pointers during its destruction.
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Inform frame sink capturers of where the mouse is, so that they can draw
// a cursor.
void OnMouseMoved(const gfx::PointF& location_in_window_dips,
const gfx::Size& window_size_dips);
// Query the frame sink id for this window, which can be used for optimized
// video capture.
const viz::FrameSinkId& GetFrameSinkId() const { return frame_sink_id_; }
// Look up this structure corresponding to a given CGWindowID. The returned
// weak pointer may only be accessed on the UI thread, and will be invalidated
// before it calls OnScopedCGWindowIDDestroying on its observers.
static base::WeakPtr<ScopedCGWindowID> Get(uint32_t cg_window_id);
private:
THREAD_CHECKER(thread_checker_);
const uint32_t cg_window_id_;
const viz::FrameSinkId frame_sink_id_;
base::ObserverList<Observer> observer_list_;
base::WeakPtrFactory<ScopedCGWindowID> weak_factory_;
};
} // namespace remote_cocoa
#endif // COMPONENTS_REMOTE_COCOA_BROWSER_SCOPED_CG_WINDOW_ID_H_
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