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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_SMILSTRINGTYPE_H_
#define MOZILLA_SMILSTRINGTYPE_H_

#include "nsISMILType.h"

namespace mozilla {

class SMILStringType : public nsISMILType
{
public:
  // Singleton for nsSMILValue objects to hold onto.
  static SMILStringType 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,
                       uint32_t 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.
  SMILStringType()  {}
  ~SMILStringType() {}
};

} // namespace mozilla

#endif // MOZILLA_SMILSTRINGTYPE_H_