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Diffstat (limited to 'dom/smil/nsSMILNullType.h')
-rw-r--r-- | dom/smil/nsSMILNullType.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/dom/smil/nsSMILNullType.h b/dom/smil/nsSMILNullType.h new file mode 100644 index 000000000..d21610ff4 --- /dev/null +++ b/dom/smil/nsSMILNullType.h @@ -0,0 +1,50 @@ +/* -*- 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 NS_SMILNULLTYPE_H_ +#define NS_SMILNULLTYPE_H_ + +#include "mozilla/Attributes.h" +#include "nsISMILType.h" + +class nsSMILNullType : public nsISMILType +{ +public: + // Singleton for nsSMILValue objects to hold onto. + static nsSMILNullType* + Singleton() + { + static nsSMILNullType sSingleton; + return &sSingleton; + } + +protected: + // nsISMILType Methods + // ------------------- + virtual void Init(nsSMILValue& aValue) const override {} + virtual void Destroy(nsSMILValue& aValue) const override {} + virtual nsresult Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const override; + + // The remaining methods should never be called, so although they're very + // simple they don't need to be inline. + virtual bool IsEqual(const nsSMILValue& aLeft, + const nsSMILValue& aRight) const override; + virtual nsresult Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd, + uint32_t aCount) const override; + virtual nsresult ComputeDistance(const nsSMILValue& aFrom, + const nsSMILValue& aTo, + double& aDistance) const override; + virtual nsresult Interpolate(const nsSMILValue& aStartVal, + const nsSMILValue& aEndVal, + double aUnitDistance, + nsSMILValue& aResult) const override; + +private: + // Private constructor: prevent instances beyond my singleton. + constexpr nsSMILNullType() {} +}; + +#endif // NS_SMILNULLTYPE_H_ |