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/*
* Copyright (C) 2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "CSSNumericValue.h"
#include "CSSPrimitiveValue.h"
#include "ScrollTimeline.h"
#include "Styleable.h"
#include "ViewTimelineOptions.h"
#include <wtf/Ref.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
namespace Style {
class BuilderState;
}
class Element;
class StickyPositionViewportConstraints;
struct TimelineRange;
struct StickinessAdjustmentData {
bool operator==(const StickinessAdjustmentData& other) const = default;
enum class StickinessLocation {
BeforeEntry,
DuringEntry,
WhileContained,
DuringExit,
AfterExit
};
float entryDistanceAdjustment() const;
float exitDistanceAdjustment() const;
float rangeStartAdjustment() const;
float rangeEndAdjustment() const;
static StickinessAdjustmentData computeStickinessAdjustmentData(const StickyPositionViewportConstraints&, ScrollTimeline::ResolvedScrollDirection, float scrollContainerSize, float subjectSize, float subjectOffset);
float stickyTopOrLeftAdjustment { 0 };
StickinessLocation topOrLeftAdjustmentLocation { StickinessLocation::WhileContained };
float stickyBottomOrRightAdjustment { 0 };
StickinessLocation bottomOrRightAdjustmentLocation { StickinessLocation::WhileContained };
};
class ViewTimeline final : public ScrollTimeline {
public:
static ExceptionOr<Ref<ViewTimeline>> create(Document&, ViewTimelineOptions&& = { });
static Ref<ViewTimeline> create(const AtomString&, ScrollAxis, ViewTimelineInsets&&);
const Element* subject() const;
const WeakStyleable subjectStyleable() const { return m_subject; }
void setSubject(Element*);
void setSubject(const Styleable&);
const ViewTimelineInsets& insets() const { return m_insets; }
void setInsets(ViewTimelineInsets&& insets) { m_insets = WTFMove(insets); }
Ref<CSSNumericValue> startOffset() const;
Ref<CSSNumericValue> endOffset() const;
AnimationTimeline::ShouldUpdateAnimationsAndSendEvents documentWillUpdateAnimationsAndSendEvents() override;
AnimationTimelinesController* controller() const override;
const RenderBox* sourceScrollerRenderer() const;
const RenderElement* stickyContainer() const;
Element* source() const override;
TimelineRange defaultRange() const final;
std::pair<WebAnimationTime, WebAnimationTime> intervalForAttachmentRange(const TimelineRange&) const final;
std::pair<double, double> offsetIntervalForAttachmentRange(const TimelineRange&) const;
std::pair<double, double> offsetIntervalForTimelineRangeName(const SingleTimelineRange::Name) const;
private:
ScrollTimeline::Data computeTimelineData() const final;
std::pair<double, double> intervalForTimelineRangeName(const ScrollTimeline::Data&, const SingleTimelineRange::Name) const;
template<typename F> double mapOffsetToTimelineRange(const ScrollTimeline::Data&, const SingleTimelineRange::Name, F&&) const;
explicit ViewTimeline(ScrollAxis);
explicit ViewTimeline(const AtomString&, ScrollAxis, ViewTimelineInsets&&);
bool isViewTimeline() const final { return true; }
struct CurrentTimeData {
float scrollOffset { 0 };
float scrollContainerSize { 0 };
float subjectOffset { 0 };
float subjectSize { 0 };
float insetStart { 0 };
float insetEnd { 0 };
StickinessAdjustmentData stickinessData { };
};
void cacheCurrentTime();
struct SpecifiedViewTimelineInsets {
RefPtr<CSSPrimitiveValue> start;
RefPtr<CSSPrimitiveValue> end;
};
ExceptionOr<SpecifiedViewTimelineInsets> validateSpecifiedInsets(const ViewTimelineInsetValue, const Document&);
WeakStyleable m_subject;
std::optional<SpecifiedViewTimelineInsets> m_specifiedInsets;
ViewTimelineInsets m_insets;
CurrentTimeData m_cachedCurrentTimeData { };
};
WTF::TextStream& operator<<(WTF::TextStream&, const StickinessAdjustmentData&);
WTF::TextStream& operator<<(WTF::TextStream&, const StickinessAdjustmentData::StickinessLocation&);
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_ANIMATION_TIMELINE(ViewTimeline, isViewTimeline())
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