Source/core/animation/AnimatableLength.cpp

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

#include "platform/CalculationValue.h"
#include "platform/animation/AnimationUtilities.h"

namespace WebCore {

namespace {

double clampNumber(double value, ValueRange range)
{
    if (range == ValueRangeNonNegative)
        return std::max(value, 0.0);
    ASSERT(range == ValueRangeAll);
    return value;
}

} // namespace

AnimatableLength::AnimatableLength(const Length& length, float zoom)
{
    ASSERT(zoom);
    PixelsAndPercent pixelsAndPercent = length.pixelsAndPercent();
    m_pixels = pixelsAndPercent.pixels / zoom;
    m_percent = pixelsAndPercent.percent;
    m_hasPixels = length.type() != Percent;
    m_hasPercent = !length.isFixed();
}

Length AnimatableLength::length(float zoom, ValueRange range) const
{
    if (!m_hasPercent)
        return Length(clampNumber(m_pixels, range) * zoom, Fixed);
    if (!m_hasPixels)
        return Length(clampNumber(m_percent, range), Percent);
    return Length(CalculationValue::create(PixelsAndPercent(m_pixels * zoom, m_percent), range));
}

PassRefPtrWillBeRawPtr<AnimatableValue> AnimatableLength::interpolateTo(const AnimatableValue* value, double fraction) const
{
    const AnimatableLength* length = toAnimatableLength(value);
    return create(blend(m_pixels, length->m_pixels, fraction), blend(m_percent, length->m_percent, fraction),
        m_hasPixels || length->m_hasPixels, m_hasPercent || length->m_hasPercent);
}

bool AnimatableLength::equalTo(const AnimatableValue* value) const
{
    const AnimatableLength* length = toAnimatableLength(value);
    return m_pixels == length->m_pixels && m_percent == length->m_percent && m_hasPixels == length->m_hasPixels && m_hasPercent == length->m_hasPercent;
}

} // namespace WebCore