/*
 * 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.
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#ifndef SKY_ENGINE_CORE_ANIMATION_ANIMATABLE_ANIMATABLELENGTHBOX_H_
#define SKY_ENGINE_CORE_ANIMATION_ANIMATABLE_ANIMATABLELENGTHBOX_H_

#include "sky/engine/core/animation/animatable/AnimatableValue.h"

namespace blink {

class AnimatableLengthBox final : public AnimatableValue {
public:
    virtual ~AnimatableLengthBox() { }
    static PassRefPtr<AnimatableLengthBox> create(PassRefPtr<AnimatableValue> left, PassRefPtr<AnimatableValue> right, PassRefPtr<AnimatableValue> top, PassRefPtr<AnimatableValue> bottom)
    {
        return adoptRef(new AnimatableLengthBox(left, right, top, bottom));
    }
    const AnimatableValue* left() const { return m_left.get(); }
    const AnimatableValue* right() const { return m_right.get(); }
    const AnimatableValue* top() const { return m_top.get(); }
    const AnimatableValue* bottom() const { return m_bottom.get(); }

protected:
    virtual PassRefPtr<AnimatableValue> interpolateTo(const AnimatableValue*, double fraction) const override;

private:
    AnimatableLengthBox(PassRefPtr<AnimatableValue> left, PassRefPtr<AnimatableValue> right, PassRefPtr<AnimatableValue> top, PassRefPtr<AnimatableValue> bottom)
        : m_left(left)
        , m_right(right)
        , m_top(top)
        , m_bottom(bottom)
    {
    }
    virtual AnimatableType type() const override { return TypeLengthBox; }
    virtual bool equalTo(const AnimatableValue*) const override;

    RefPtr<AnimatableValue> m_left;
    RefPtr<AnimatableValue> m_right;
    RefPtr<AnimatableValue> m_top;
    RefPtr<AnimatableValue> m_bottom;
};

DEFINE_ANIMATABLE_VALUE_TYPE_CASTS(AnimatableLengthBox, isLengthBox());

} // namespace blink

#endif  // SKY_ENGINE_CORE_ANIMATION_ANIMATABLE_ANIMATABLELENGTHBOX_H_