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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_
#define UI_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_
#include <vector>
#include "base/observer_list.h"
#include "build/buildflag.h"
#include "ui/display/display_export.h"
namespace display {
class Display;
class DisplayObserver;
// DisplayChangeNotifier is a class implementing the handling of DisplayObserver
// notification for Screen.
class DISPLAY_EXPORT DisplayChangeNotifier {
public:
DisplayChangeNotifier();
DisplayChangeNotifier(const DisplayChangeNotifier&) = delete;
DisplayChangeNotifier& operator=(const DisplayChangeNotifier&) = delete;
~DisplayChangeNotifier();
void AddObserver(DisplayObserver* observer);
void RemoveObserver(DisplayObserver* observer);
void NotifyDisplaysChanged(const std::vector<Display>& old_displays,
const std::vector<Display>& new_displays);
void NotifyCurrentWorkspaceChanged(const std::string& workspace);
#if BUILDFLAG(IS_MAC)
void NotifyPrimaryDisplayChanged();
#endif
private:
// The observers that need to be notified when a display is modified, added
// or removed.
base::ObserverList<DisplayObserver> observer_list_;
};
} // namespace display
#endif // UI_DISPLAY_DISPLAY_CHANGE_NOTIFIER_H_
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