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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 ASH_DISPLAY_SCREEN_ASH_H_
#define ASH_DISPLAY_SCREEN_ASH_H_
#include "ash/ash_export.h"
#include "base/compiler_specific.h"
#include "base/observer_list.h"
#include "ui/gfx/display_observer.h"
#include "ui/gfx/screen.h"
namespace gfx {
class Rect;
}
namespace ash {
namespace internal {
class DisplayManager;
}
// Aura implementation of gfx::Screen. Implemented here to avoid circular
// dependencies.
class ASH_EXPORT ScreenAsh : public gfx::Screen {
public:
ScreenAsh();
~ScreenAsh() override;
// gfx::Screen overrides:
gfx::Point GetCursorScreenPoint() override;
gfx::NativeWindow GetWindowUnderCursor() override;
gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override;
int GetNumDisplays() const override;
std::vector<gfx::Display> GetAllDisplays() const override;
gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const override;
gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const override;
gfx::Display GetDisplayMatching(const gfx::Rect& match_rect) const override;
gfx::Display GetPrimaryDisplay() const override;
void AddObserver(gfx::DisplayObserver* observer) override;
void RemoveObserver(gfx::DisplayObserver* observer) override;
private:
friend class DisplayManager;
// Notifies observers of display configuration changes.
void NotifyMetricsChanged(const gfx::Display& display, uint32_t metrics);
void NotifyDisplayAdded(const gfx::Display& display);
void NotifyDisplayRemoved(const gfx::Display& display);
// Creates a screen that can be used during shutdown.
// It simply has a copy of the displays.
gfx::Screen* CloneForShutdown();
base::ObserverList<gfx::DisplayObserver> observers_;
DISALLOW_COPY_AND_ASSIGN(ScreenAsh);
};
} // namespace ash
#endif // ASH_DISPLAY_SCREEN_ASH_H_
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