root/Source/core/animation/AnimatableDouble.cpp

DEFINITIONS

1. toCSSValue
2. usesDefaultInterpolationWith
3. interpolateTo
4. addWith
5. equalTo
6. distanceTo

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

#include "core/css/CSSPrimitiveValue.h"
#include "core/css/CSSValuePool.h"
#include "platform/animation/AnimationUtilities.h"
#include <math.h>

namespace WebCore {

PassRefPtrWillBeRawPtr<CSSValue> AnimatableDouble::toCSSValue() const
{
    return cssValuePool().createValue(m_number, CSSPrimitiveValue::CSS_NUMBER);
}

bool AnimatableDouble::usesDefaultInterpolationWith(const AnimatableValue* value) const
{
    const AnimatableDouble* other = toAnimatableDouble(value);
    return (m_constraint == InterpolationIsNonContinuousWithZero) && (!m_number || !other->m_number);
}

PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableDouble::interpolateTo(const AnimatableValue* value, double fraction) const
{
    const AnimatableDouble* other = toAnimatableDouble(value);
    ASSERT(m_constraint == other->m_constraint);
    if ((m_constraint == InterpolationIsNonContinuousWithZero) && (!m_number || !other->m_number))
        return defaultInterpolateTo(this, value, fraction);
    return AnimatableDouble::create(blend(m_number, other->m_number, fraction));
}

PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableDouble::addWith(const AnimatableValue* value) const
{
    // Optimization for adding with 0.
    if (!m_number)
        return takeConstRef(value);
    const AnimatableDouble* other = toAnimatableDouble(value);
    if (!other->m_number)
        return takeConstRef(this);

    return AnimatableDouble::create(m_number + other->m_number);
}

bool AnimatableDouble::equalTo(const AnimatableValue* value) const
{
    return m_number == toAnimatableDouble(value)->m_number;
}

double AnimatableDouble::distanceTo(const AnimatableValue* value) const
{
    const AnimatableDouble* other = toAnimatableDouble(value);
    return fabs(m_number - other->m_number);
}

} // namespace WebCore