/* -*- 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_GenericScrollAnimation_h_
#define mozilla_layers_GenericScrollAnimation_h_
#include "AsyncPanZoomAnimation.h"
namespace mozilla {
class ScrollAnimationPhysics;
namespace layers {
class AsyncPanZoomController;
class GenericScrollAnimation :
public AsyncPanZoomAnimation {
public:
GenericScrollAnimation(AsyncPanZoomController& aApzc,
const nsPoint& aInitialPosition, ScrollOrigin aOrigin);
bool DoSample(FrameMetrics& aFrameMetrics,
const TimeDuration& aDelta) override;
bool HandleScrollOffsetUpdate(
const Maybe<CSSPoint>& aRelativeDelta) override;
void UpdateDelta(TimeStamp aTime,
const nsPoint& aDelta,
const nsSize& aCurrentVelocity);
void UpdateDestination(TimeStamp aTime,
const nsPoint& aDestination,
const nsSize& aCurrentVelocity);
CSSPoint GetDestination()
const {
return CSSPoint::FromAppUnits(mFinalDestination);
}
private:
void Update(TimeStamp aTime,
const nsSize& aCurrentVelocity);
protected:
AsyncPanZoomController& mApzc;
UniquePtr<ScrollAnimationPhysics> mAnimationPhysics;
nsPoint mFinalDestination;
// If a direction is forced to overscroll, it means it's axis in that
// direction is locked, and scroll in that direction is treated as overscroll
// of an equal amount, which, for example, may then bubble up a scroll action
// to its parent, or may behave as whatever an overscroll occurence requires
// to behave
Maybe<ScrollDirection> mDirectionForcedToOverscroll;
};
}
// namespace layers
}
// namespace mozilla
#endif // mozilla_layers_GenericScrollAnimation_h_
