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Diffstat (limited to '')
-rw-r--r-- | dom/svg/SVGMotionSMILType.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/dom/svg/SVGMotionSMILType.h b/dom/svg/SVGMotionSMILType.h new file mode 100644 index 0000000000..8b62641035 --- /dev/null +++ b/dom/svg/SVGMotionSMILType.h @@ -0,0 +1,76 @@ +/* -*- 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/. */ + +/* implementation of SMILType for use by <animateMotion> element */ + +#ifndef DOM_SVG_SVGMOTIONSMILTYPE_H_ +#define DOM_SVG_SVGMOTIONSMILTYPE_H_ + +#include "mozilla/gfx/2D.h" +#include "mozilla/Attributes.h" +#include "mozilla/SMILType.h" + +namespace mozilla { + +class SMILValue; + +/** + * MotionRotateType: Enum to indicate the type of our "rotate" attribute. + */ +enum RotateType { + eRotateType_Explicit, // for e.g. rotate="45"/"45deg"/"0.785rad" + eRotateType_Auto, // for rotate="auto" + eRotateType_AutoReverse // for rotate="auto-reverse" +}; + +/** + * SVGMotionSMILType: Implements the SMILType interface for SMIL animations + * from <animateMotion>. + * + * NOTE: Even though there's technically no "motion" attribute, we behave in + * many ways as if there were, for simplicity. + */ +class SVGMotionSMILType : public SMILType { + using Path = mozilla::gfx::Path; + + public: + // Singleton for SMILValue objects to hold onto. + static SVGMotionSMILType sSingleton; + + protected: + // SMILType Methods + // ------------------- + void Init(SMILValue& aValue) const override; + void Destroy(SMILValue& aValue) const override; + nsresult Assign(SMILValue& aDest, const SMILValue& aSrc) const override; + bool IsEqual(const SMILValue& aLeft, const SMILValue& aRight) const override; + nsresult Add(SMILValue& aDest, const SMILValue& aValueToAdd, + uint32_t aCount) const override; + nsresult SandwichAdd(SMILValue& aDest, + const SMILValue& aValueToAdd) 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; + + public: + // Used to generate a transform matrix from an <animateMotion> SMILValue. + static gfx::Matrix CreateMatrix(const SMILValue& aSMILVal); + + // Used to generate a SMILValue for the point at the given distance along + // the given path. + static SMILValue ConstructSMILValue(Path* aPath, float aDist, + RotateType aRotateType, + float aRotateAngle); + + private: + // Private constructor: prevent instances beyond my singleton. + constexpr SVGMotionSMILType() = default; +}; + +} // namespace mozilla + +#endif // DOM_SVG_SVGMOTIONSMILTYPE_H_ |