xref: /external/chromium_org/third_party/WebKit/Source/core/animation/animatable/AnimatableValue.cpp

/*
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#include "config.h"
#include "core/animation/animatable/AnimatableValue.h"

#include "core/animation/animatable/AnimatableNeutral.h"
#include "wtf/StdLibExtras.h"
#include <algorithm>

namespace {

const double defaultDistance = 1;

} // namespace

namespace blink {

const AnimatableValue* AnimatableValue::neutralValue()
{
    DEFINE_STATIC_REF_WILL_BE_PERSISTENT(AnimatableNeutral, neutralSentinelValue, (AnimatableNeutral::create()));
    return neutralSentinelValue;
}

PassRefPtrWillBeRawPtr<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);
}

double AnimatableValue::distance(const AnimatableValue* left, const AnimatableValue* right)
{
    ASSERT(left);
    ASSERT(right);

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

    return defaultDistance;
}

double AnimatableValue::distanceTo(const AnimatableValue*) const
{
    return defaultDistance;
}

} // namespace blink