1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/smil/nsSMILNullType.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,49 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef NS_SMILNULLTYPE_H_
1.10 +#define NS_SMILNULLTYPE_H_
1.11 +
1.12 +#include "mozilla/Attributes.h"
1.13 +#include "nsISMILType.h"
1.14 +
1.15 +class nsSMILNullType : public nsISMILType
1.16 +{
1.17 +public:
1.18 + // Singleton for nsSMILValue objects to hold onto.
1.19 + static nsSMILNullType*
1.20 + Singleton()
1.21 + {
1.22 + static nsSMILNullType sSingleton;
1.23 + return &sSingleton;
1.24 + }
1.25 +
1.26 +protected:
1.27 + // nsISMILType Methods
1.28 + // -------------------
1.29 + virtual void Init(nsSMILValue& aValue) const MOZ_OVERRIDE {}
1.30 + virtual void Destroy(nsSMILValue& aValue) const MOZ_OVERRIDE {}
1.31 + virtual nsresult Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const MOZ_OVERRIDE;
1.32 +
1.33 + // The remaining methods should never be called, so although they're very
1.34 + // simple they don't need to be inline.
1.35 + virtual bool IsEqual(const nsSMILValue& aLeft,
1.36 + const nsSMILValue& aRight) const MOZ_OVERRIDE;
1.37 + virtual nsresult Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
1.38 + uint32_t aCount) const MOZ_OVERRIDE;
1.39 + virtual nsresult ComputeDistance(const nsSMILValue& aFrom,
1.40 + const nsSMILValue& aTo,
1.41 + double& aDistance) const MOZ_OVERRIDE;
1.42 + virtual nsresult Interpolate(const nsSMILValue& aStartVal,
1.43 + const nsSMILValue& aEndVal,
1.44 + double aUnitDistance,
1.45 + nsSMILValue& aResult) const MOZ_OVERRIDE;
1.46 +
1.47 +private:
1.48 + // Private constructor: prevent instances beyond my singleton.
1.49 + MOZ_CONSTEXPR nsSMILNullType() {}
1.50 +};
1.51 +
1.52 +#endif // NS_SMILNULLTYPE_H_
