Source/core/animation/AnimatableValue.cpp

/*
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#include "config.h"
#include "core/animation/AnimatableValue.h"
#include "core/animation/AnimatableNeutral.h"
#include <algorithm>

namespace WebCore {

const AnimatableValue* AnimatableValue::neutralValue()
{
    static AnimatableNeutral* neutralSentinelValue = AnimatableNeutral::create().leakRef();
    return neutralSentinelValue;
}

PassRefPtr<AnimatableValue> AnimatableValue::interpolate(const AnimatableValue* left, const AnimatableValue* right, double fraction)
{
    ASSERT(left);
    ASSERT(right);
    ASSERT(!left->isNeutral());
    ASSERT(!right->isNeutral());

    if (fraction && fraction != 1 && left->isSameType(right))
        return left->interpolateTo(right, fraction);

    return defaultInterpolateTo(left, right, fraction);
}

PassRefPtr<AnimatableValue> AnimatableValue::add(const AnimatableValue* left, const AnimatableValue* right)
{
    ASSERT(left);
    ASSERT(right);

    if (left->isNeutral())
        return takeConstRef(right);
    if (right->isNeutral())
        return takeConstRef(left);

    if (left->isSameType(right))
        return left->addWith(right);

    return defaultAddWith(left, right);
}

PassRefPtr<AnimatableValue> AnimatableValue::addWith(const AnimatableValue* value) const
{
    return defaultAddWith(this, value);
}

} // namespace WebCore