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// Copyright 2014 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 COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TRACKER_H_
#define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TRACKER_H_
#include <stdint.h>
#include <set>
#include "components/mus/public/cpp/window_observer.h"
#include "mojo/public/cpp/system/macros.h"
namespace mus {
class WindowTracker : public WindowObserver {
public:
using Windows = std::set<Window*>;
WindowTracker();
~WindowTracker() override;
// Returns the set of windows being observed.
const std::set<Window*>& windows() const { return windows_; }
// Adds |window| to the set of Windows being tracked.
void Add(Window* window);
// Removes |window| from the set of windows being tracked.
void Remove(Window* window);
// Returns true if |window| was previously added and has not been removed or
// deleted.
bool Contains(Window* window);
// WindowObserver overrides:
void OnWindowDestroying(Window* window) override;
private:
Windows windows_;
MOJO_DISALLOW_COPY_AND_ASSIGN(WindowTracker);
};
} // namespace mus
#endif // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TRACKER_H_
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