gecko-dev/content/smil/SMILEnumType.h

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#ifndef MOZILLA_SMILENUMTYPE_H_
#define MOZILLA_SMILENUMTYPE_H_

#include "nsISMILType.h"

namespace mozilla {

class SMILEnumType : public nsISMILType
{
public:
  // Singleton for nsSMILValue objects to hold onto.
  static SMILEnumType sSingleton;

protected:
  // nsISMILType Methods
  // -------------------
  virtual void     Init(nsSMILValue& aValue) const;
  virtual void     Destroy(nsSMILValue&) const;
  virtual nsresult Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const;
  virtual bool     IsEqual(const nsSMILValue& aLeft,
                           const nsSMILValue& aRight) const;
  virtual nsresult Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
                       PRUint32 aCount) const;
  virtual nsresult ComputeDistance(const nsSMILValue& aFrom,
                                   const nsSMILValue& aTo,
                                   double& aDistance) const;
  virtual nsresult Interpolate(const nsSMILValue& aStartVal,
                               const nsSMILValue& aEndVal,
                               double aUnitDistance,
                               nsSMILValue& aResult) const;

private:
  // Private constructor & destructor: prevent instances beyond my singleton,
  // and prevent others from deleting my singleton.
  SMILEnumType()  {}
  ~SMILEnumType() {}
};

} // namespace mozilla

#endif // MOZILLA_SMILENUMTYPE_H_