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#ifndef SVGAnimatedNumberOptionalNumber_h
#define SVGAnimatedNumberOptionalNumber_h

#include "core/svg/SVGAnimatedNumber.h"
#include "core/svg/SVGNumberOptionalNumber.h"

namespace blink {

// SVG Spec: http://www.w3.org/TR/SVG11/types.html <number-optional-number>
// Unlike other SVGAnimated* class, this class is not exposed to Javascript directly,
// while DOM attribute and SMIL animations operate on this class.
// From Javascript, the two SVGAnimatedNumbers |firstNumber| and |secondNumber| are used.
// For example, see SVGFEDropShadowElement::stdDeviation{X,Y}()
class SVGAnimatedNumberOptionalNumber : public SVGAnimatedPropertyCommon<SVGNumberOptionalNumber> {
public:
    static PassRefPtr<SVGAnimatedNumberOptionalNumber> create(SVGElement* contextElement, const QualifiedName& attributeName, float initialFirstValue = 0, float initialSecondValue = 0)
    {
        return adoptRef(new SVGAnimatedNumberOptionalNumber(contextElement, attributeName, initialFirstValue, initialSecondValue));
    }

    virtual void setAnimatedValue(PassRefPtr<SVGPropertyBase>) OVERRIDE;
    virtual bool needsSynchronizeAttribute() OVERRIDE;
    virtual void animationEnded() OVERRIDE;

    SVGAnimatedNumber* firstNumber() { return m_firstNumber.get(); }
    SVGAnimatedNumber* secondNumber() { return m_secondNumber.get(); }

protected:
    SVGAnimatedNumberOptionalNumber(SVGElement* contextElement, const QualifiedName& attributeName, float initialFirstValue, float initialSecondValue);

    RefPtr<SVGAnimatedNumber> m_firstNumber;
    RefPtr<SVGAnimatedNumber> m_secondNumber;
};

} // namespace blink

#endif // SVGAnimatedNumberOptionalNumber_h
