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 * modification, are permitted provided that the following conditions are
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 *
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 * in the documentation and/or other materials provided with the
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#ifndef AnimatableLengthBox_h
#define AnimatableLengthBox_h

#include "core/animation/AnimatableValue.h"

namespace WebCore {

class AnimatableLengthBox : 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;
    virtual PassRefPtr<AnimatableValue> addWith(const AnimatableValue*) const OVERRIDE;

private:
    AnimatableLengthBox(PassRefPtr<AnimatableValue> left, PassRefPtr<AnimatableValue> right, PassRefPtr<AnimatableValue> top, PassRefPtr<AnimatableValue> bottom)
        : AnimatableValue(TypeLengthBox)
        , m_left(left)
        , m_right(right)
        , m_top(top)
        , m_bottom(bottom)
    {
    }

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

inline const AnimatableLengthBox* toAnimatableLengthBox(const AnimatableValue* value)
{
    ASSERT_WITH_SECURITY_IMPLICATION(value && value->isLengthBox());
    return static_cast<const AnimatableLengthBox*>(value);
}

} // namespace WebCore

#endif // AnimatableLengthBox_h
