/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * 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 "sky/engine/core/animation/animatable/AnimatableShapeValue.h"

namespace blink {

bool AnimatableShapeValue::usesDefaultInterpolationWith(const AnimatableValue* value) const
{
    const AnimatableShapeValue* shapeValue = toAnimatableShapeValue(value);

    if (m_shape->type() != ShapeValue::Shape
        || shapeValue->m_shape->type() != ShapeValue::Shape
        || m_shape->cssBox() != shapeValue->m_shape->cssBox())
        return true;

    const BasicShape* fromShape = this->m_shape->shape();
    const BasicShape* toShape = shapeValue->m_shape->shape();

    return !fromShape->canBlend(toShape);
}

PassRefPtr<AnimatableValue> AnimatableShapeValue::interpolateTo(const AnimatableValue* value, double fraction) const
{
    if (usesDefaultInterpolationWith(value))
        return defaultInterpolateTo(this, value, fraction);

    const AnimatableShapeValue* shapeValue = toAnimatableShapeValue(value);
    const BasicShape* fromShape = this->m_shape->shape();
    const BasicShape* toShape = shapeValue->m_shape->shape();
    return AnimatableShapeValue::create(ShapeValue::createShapeValue(toShape->blend(fromShape, fraction), shapeValue->m_shape->cssBox()).get());
}

bool AnimatableShapeValue::equalTo(const AnimatableValue* value) const
{
    const ShapeValue* shape = toAnimatableShapeValue(value)->m_shape.get();
    return m_shape == shape || (m_shape && shape && *m_shape == *shape);
}

}