/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_layers_AutocrollAnimation_h_
#define mozilla_layers_AutocrollAnimation_h_

#include "AsyncPanZoomAnimation.h"

namespace mozilla {
namespace layers {

class AsyncPanZoomController;

class AutoscrollAnimation : public AsyncPanZoomAnimation {
 public:
  AutoscrollAnimation(AsyncPanZoomController& aApzc,
                      const ScreenPoint& aAnchorLocation);

  bool DoSample(FrameMetrics& aFrameMetrics,
                const TimeDuration& aDelta) override;

  bool HandleScrollOffsetUpdate(
      const Maybe<CSSPoint>& aRelativeDelta) override {
    // Autoscroll works using screen space coordinates, so there's no work we
    // need to do to handle either a relative or an absolute scroll update.
    return true;
  }

  void Cancel(CancelAnimationFlags aFlags) override;

 private:
  AsyncPanZoomController& mApzc;
  ScreenPoint mAnchorLocation;
};

}  // namespace layers
}  // namespace mozilla

#endif  // mozilla_layers_AutoscrollAnimation_h_
