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/*
* Copyright (C) 2020 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 "CSSAnimation.h"
#include "NameScope.h"
#include "ScrollAxis.h"
#include "Styleable.h"
#include <wtf/CheckedRef.h>
#include <wtf/WeakHashSet.h>
#include <wtf/text/AtomStringHash.h>
namespace WebCore {
class ScrollTimeline;
class WebAnimation;
struct ViewTimelineInsets;
struct TimelineMapAttachOperation {
WeakStyleable element;
AtomString name;
Ref<CSSAnimation> animation;
};
// A style-originated timeline is a timeline that is assigned to a CSS Animation
// via the `animation-timeline` property. These timelines may be created directly
// as a result of that property being set to a `scroll()` or `view()` value, but
// the `scroll-timeline-name` and `view-timeline-name` properties may be used on
// another element to define those elements as the scroll timeline's source or view
// timeline's subject. Additionally, the `timeline-scope` property can also be used
// on a shared ancestor to determine allow a `{scroll|view}-timeline-name` value to
// be used as an `animation-timeline` property in more complex hierarchies.
//
// https://drafts.csswg.org/css-animations-2/#animation-timeline
// https://drafts.csswg.org/scroll-animations-1/#scroll-timeline-name
// https://drafts.csswg.org/scroll-animations-1/#view-timeline-name
// https://drafts.csswg.org/scroll-animations-1/#timeline-scope
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(StyleOriginatedTimelinesController);
class StyleOriginatedTimelinesController final : public CanMakeCheckedPtr<StyleOriginatedTimelinesController> {
WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(StyleOriginatedTimelinesController);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(StyleOriginatedTimelinesController);
public:
explicit StyleOriginatedTimelinesController() = default;
~StyleOriginatedTimelinesController() = default;
void registerNamedScrollTimeline(const AtomString&, const Styleable&, ScrollAxis);
void registerNamedViewTimeline(const AtomString&, const Styleable&, ScrollAxis, ViewTimelineInsets&&);
void unregisterNamedTimeline(const AtomString&, const Styleable&);
void setTimelineForName(const AtomString&, const Styleable&, CSSAnimation&);
void updateNamedTimelineMapForTimelineScope(const NameScope&, const Styleable&);
void updateTimelineForTimelineScope(const Ref<ScrollTimeline>&, const AtomString&);
void unregisterNamedTimelinesAssociatedWithElement(const Styleable&);
void removePendingOperationsForCSSAnimation(const CSSAnimation&);
bool isPendingTimelineAttachment(const WebAnimation&) const;
void documentDidResolveStyle();
void styleableWasRemoved(const Styleable&);
private:
Vector<Ref<ScrollTimeline>>& timelinesForName(const AtomString&);
Vector<WeakStyleable> relatedTimelineScopeElements(const AtomString&);
void updateCSSAnimationsAssociatedWithNamedTimeline(const AtomString&);
enum class AllowsDeferral : bool { No, Yes };
void setTimelineForName(const AtomString&, const Styleable&, CSSAnimation&, AllowsDeferral);
ScrollTimeline* determineTimelineForElement(const Vector<Ref<ScrollTimeline>>&, const Styleable&, const Vector<WeakStyleable>&);
ScrollTimeline* determineTreeOrder(const Vector<Ref<ScrollTimeline>>&, const Styleable&, const Vector<WeakStyleable>&);
ScrollTimeline& inactiveNamedTimeline(const AtomString&);
Vector<TimelineMapAttachOperation> m_pendingAttachOperations;
Vector<std::pair<NameScope, WeakStyleable>> m_timelineScopeEntries;
UncheckedKeyHashMap<AtomString, Vector<Ref<ScrollTimeline>>> m_nameToTimelineMap;
HashSet<Ref<ScrollTimeline>> m_removedTimelines;
};
} // namespace WebCore
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