/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 */

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

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

namespace WebCore {

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

PassRefPtr<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));
}

PassRefPtr<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;
}

} // namespace WebCore