chromium/chromeos/ui/frame/caption_buttons/snap_controller.h

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROMEOS_UI_FRAME_CAPTION_BUTTONS_SNAP_CONTROLLER_H_
#define CHROMEOS_UI_FRAME_CAPTION_BUTTONS_SNAP_CONTROLLER_H_

#include "base/component_export.h"

namespace aura {
class Window;
}

namespace chromeos {

// Snap ratios that correspond to the size of a window when it is snapped. A
// window with `kOneThirdSnapRatio` will snap to one third of the display,
// `kTwoThirdSnapRatio` will snap to two thirds of the display, and
// `kDefaultSnapRatio` will snap to the default half of the display.
constexpr float kOneThirdSnapRatio = …;
constexpr float kDefaultSnapRatio = …;
constexpr float kTwoThirdSnapRatio = …;

// The previewed snap state for a window, corresponding to the use of a
// PhantomWindowController.
enum class SnapDirection { … };

// This interface handles snap actions to be performed on a top level window.
// The singleton that implements the interface is provided by Ash.
class COMPONENT_EXPORT(CHROMEOS_UI_FRAME) SnapController { … };

}  // namespace chromeos

#endif  // CHROMEOS_UI_FRAME_CAPTION_BUTTONS_SNAP_CONTROLLER_H_