Source/core/animation/Animation.cpp

/*
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#include "config.h"
#include "core/animation/Animation.h"

#include "core/animation/DocumentTimeline.h"
#include "core/animation/Player.h"
#include "core/dom/Element.h"

namespace WebCore {

PassRefPtr<Animation> Animation::create(PassRefPtr<Element> target, PassRefPtr<AnimationEffect> effect, const Timing& timing, PassOwnPtr<EventDelegate> eventDelegate)
{
    return adoptRef(new Animation(target, effect, timing, eventDelegate));
}

Animation::Animation(PassRefPtr<Element> target, PassRefPtr<AnimationEffect> effect, const Timing& timing, PassOwnPtr<EventDelegate> eventDelegate)
    : TimedItem(timing, eventDelegate)
    , m_target(target)
    , m_effect(effect)
    , m_activeInAnimationStack(false)
{
}

void Animation::willDetach()
{
    if (m_activeInAnimationStack)
        clearEffects();
}

static AnimationStack* ensureAnimationStack(Element* element)
{
    return element->ensureActiveAnimations()->defaultStack();
}

void Animation::applyEffects(bool previouslyInEffect)
{
    ASSERT(player());
    if (!previouslyInEffect) {
        ensureAnimationStack(m_target.get())->add(this);
        m_activeInAnimationStack = true;
    }
    m_compositableValues = m_effect->sample(currentIteration(), timeFraction());
    m_target->setNeedsStyleRecalc(LocalStyleChange, StyleChangeFromRenderer);
}

void Animation::clearEffects()
{
    ASSERT(player());
    ASSERT(m_activeInAnimationStack);
    ensureAnimationStack(m_target.get())->remove(this);
    m_activeInAnimationStack = false;
    m_compositableValues.clear();
    m_target->setNeedsStyleRecalc(LocalStyleChange, StyleChangeFromRenderer);
}

void Animation::updateChildrenAndEffects(bool wasInEffect) const
{
    ASSERT(m_activeInAnimationStack == wasInEffect);
    if (isInEffect())
        const_cast<Animation*>(this)->applyEffects(wasInEffect);
    else if (wasInEffect)
        const_cast<Animation*>(this)->clearEffects();
}

} // namespace WebCore