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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 DOM_SMIL_SMILNULLTYPE_H_
#define DOM_SMIL_SMILNULLTYPE_H_
#include "mozilla/Attributes.h"
#include "mozilla/SMILType.h"
namespace mozilla {
class SMILNullType : public SMILType {
public:
// Singleton for SMILValue objects to hold onto.
static SMILNullType* Singleton();
protected:
// SMILType Methods
// -------------------
void Init(SMILValue& aValue) const override {}
void Destroy(SMILValue& aValue) const override {}
nsresult Assign(SMILValue& aDest, const SMILValue& aSrc) const override;
// The remaining methods should never be called, so although they're very
// simple they don't need to be inline.
bool IsEqual(const SMILValue& aLeft, const SMILValue& aRight) const override;
nsresult Add(SMILValue& aDest, const SMILValue& aValueToAdd,
uint32_t aCount) const override;
nsresult ComputeDistance(const SMILValue& aFrom, const SMILValue& aTo,
double& aDistance) const override;
nsresult Interpolate(const SMILValue& aStartVal, const SMILValue& aEndVal,
double aUnitDistance, SMILValue& aResult) const override;
private:
// Private constructor: prevent instances beyond my singleton.
constexpr SMILNullType() = default;
};
} // namespace mozilla
#endif // DOM_SMIL_SMILNULLTYPE_H_
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