third_party/WebKit/Source/core/svg/SVGAnimatedNumberOptionalNumber.h

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#ifndef SVGAnimatedNumberOptionalNumber_h
#define SVGAnimatedNumberOptionalNumber_h

#include "core/svg/SVGAnimatedNumber.h"
#include "core/svg/SVGNumberOptionalNumber.h"
#include "platform/heap/Handle.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 GarbageCollectedFinalized<SVGAnimatedNumberOptionalNumber>,
      public SVGAnimatedPropertyCommon<SVGNumberOptionalNumber> {
  USING_GARBAGE_COLLECTED_MIXIN(SVGAnimatedNumberOptionalNumber);

 public:
  static SVGAnimatedNumberOptionalNumber* Create(
      SVGElement* context_element,
      const QualifiedName& attribute_name,
      float initial_first_value = 0,
      float initial_second_value = 0) {
    return new SVGAnimatedNumberOptionalNumber(context_element, attribute_name,
                                               initial_first_value,
                                               initial_second_value);
  }

  void SetAnimatedValue(SVGPropertyBase*) override;
  bool NeedsSynchronizeAttribute() override;
  void AnimationEnded() override;

  SVGAnimatedNumber* FirstNumber() { return first_number_.Get(); }
  SVGAnimatedNumber* SecondNumber() { return second_number_.Get(); }

  void Trace(blink::Visitor*) override;

 protected:
  SVGAnimatedNumberOptionalNumber(SVGElement* context_element,
                                  const QualifiedName& attribute_name,
                                  float initial_first_value,
                                  float initial_second_value);

  Member<SVGAnimatedNumber> first_number_;
  Member<SVGAnimatedNumber> second_number_;
};

}  // namespace blink

#endif  // SVGAnimatedNumberOptionalNumber_h