| // Copyright 2018 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 THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_SCROLL_TIMELINE_UTIL_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_SCROLL_TIMELINE_UTIL_H_ |
| |
| #include <memory> |
| |
| #include "base/optional.h" |
| #include "cc/animation/scroll_timeline.h" |
| #include "third_party/blink/renderer/core/animation/scroll_timeline.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/platform/animation/compositor_animation.h" |
| |
| namespace blink { |
| |
| using CompositorScrollTimeline = cc::ScrollTimeline; |
| |
| class AnimationTimeline; |
| class ComputedStyle; |
| class Node; |
| |
| namespace scroll_timeline_util { |
| |
| // Converts the input timeline to the compositor representation of a |
| // ScrollTimeline. Returns nullptr if the input is not a ScrollTimeline. |
| scoped_refptr<CompositorScrollTimeline> CORE_EXPORT |
| ToCompositorScrollTimeline(AnimationTimeline*); |
| |
| // Retrieves the 'scroll' compositor element id for the input node, or |
| // base::nullopt if it does not exist. |
| base::Optional<CompositorElementId> CORE_EXPORT |
| GetCompositorScrollElementId(const Node*); |
| |
| // Convert the blink concept of a ScrollTimeline orientation into the cc one. |
| // |
| // This implements a subset of the conversions documented in |
| // https://drafts.csswg.org/css-writing-modes-3/#logical-to-physical |
| CompositorScrollTimeline::ScrollDirection CORE_EXPORT |
| ConvertOrientation(ScrollTimeline::ScrollDirection, const ComputedStyle*); |
| |
| double ComputeProgress(double current_offset, |
| const WTF::Vector<double>& resolved_offsets); |
| |
| } // namespace scroll_timeline_util |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_SCROLL_TIMELINE_UTIL_H_ |