chromium/third_party/blink/renderer/core/animation/scroll_timeline.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_SCROLL_TIMELINE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_SCROLL_TIMELINE_H_

#include "base/gtest_prod_util.h"
#include "base/time/time.h"
#include "cc/animation/scroll_timeline.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_scroll_axis.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_typedefs.h"
#include "third_party/blink/renderer/core/animation/scroll_snapshot_timeline.h"
#include "third_party/blink/renderer/core/animation/timing.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/scroll/scroll_types.h"
#include "third_party/blink/renderer/core/style/computed_style_constants.h"

namespace blink {

class Element;
class PaintLayerScrollableArea;
class ScrollTimelineOptions;

// Implements the ScrollTimeline concept from the Scroll-linked Animations spec.
//
// A ScrollTimeline is a special form of AnimationTimeline whose time values are
// not determined by wall-clock time but instead the progress of scrolling in a
// scroll container. The user is able to specify which scroll container to
// track, the direction of scroll they care about, and various attributes to
// control the conversion of scroll amount to time output.
//
// Spec: https://wicg.github.io/scroll-animations/#scroll-timelines
class CORE_EXPORT ScrollTimeline : public ScrollSnapshotTimeline { … };

template <>
struct DowncastTraits<ScrollTimeline> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_SCROLL_TIMELINE_H_