Source/WebCore/animation/CSSTransition.h

/*
 * Copyright (C) 2018 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
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 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
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#pragma once

#include "CSSPropertyNames.h"
#include "DeclarativeAnimation.h"
#include "Styleable.h"
#include <wtf/Markable.h>
#include <wtf/MonotonicTime.h>
#include <wtf/Ref.h>
#include <wtf/Seconds.h>

namespace WebCore {

class Animation;
class RenderStyle;

class CSSTransition final : public DeclarativeAnimation {
    WTF_MAKE_ISO_ALLOCATED(CSSTransition);
public:
    static Ref<CSSTransition> create(const Styleable&, CSSPropertyID, MonotonicTime generationTime, const Animation&, const RenderStyle* oldStyle, const RenderStyle& newStyle, Seconds delay, Seconds duration, const RenderStyle& reversingAdjustedStartStyle, double);
    ~CSSTransition() = default;

    bool isCSSTransition() const override { return true; }
    String transitionProperty() const { return getPropertyNameString(m_property); }
    CSSPropertyID property() const { return m_property; }
    MonotonicTime generationTime() const { return m_generationTime; }
    std::optional<Seconds> timelineTimeAtCreation() const { return m_timelineTimeAtCreation; }
    const RenderStyle& targetStyle() const { return *m_targetStyle; }
    const RenderStyle& currentStyle() const { return *m_currentStyle; }
    const RenderStyle& reversingAdjustedStartStyle() const { return *m_reversingAdjustedStartStyle; }
    double reversingShorteningFactor() const { return m_reversingShorteningFactor; }

private:
    CSSTransition(const Styleable&, CSSPropertyID, MonotonicTime generationTime, const Animation&, const RenderStyle& oldStyle, const RenderStyle& targetStyle, const RenderStyle& reversingAdjustedStartStyle, double);
    void setTimingProperties(Seconds delay, Seconds duration);
    Ref<AnimationEventBase> createEvent(const AtomString& eventType, double elapsedTime, const String& pseudoId, std::optional<Seconds> timelineTime) final;
    void resolve(RenderStyle& targetStyle, const Style::ResolutionContext&, std::optional<Seconds>) final;
    void animationDidFinish() final;

    CSSPropertyID m_property;
    MonotonicTime m_generationTime;
    Markable<Seconds, Seconds::MarkableTraits> m_timelineTimeAtCreation;
    std::unique_ptr<RenderStyle> m_targetStyle;
    std::unique_ptr<RenderStyle> m_currentStyle;
    std::unique_ptr<RenderStyle> m_reversingAdjustedStartStyle;
    double m_reversingShorteningFactor;

};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_WEB_ANIMATION(CSSTransition, isCSSTransition())