86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* implementation of nsISMILType for use by <animateMotion> element */
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#ifndef MOZILLA_SVGMOTIONSMILTYPE_H_
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#define MOZILLA_SVGMOTIONSMILTYPE_H_
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#include "mozilla/gfx/2D.h"
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#include "mozilla/Attributes.h"
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#include "nsISMILType.h"
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class nsSMILValue;
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namespace mozilla {
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namespace gfx {
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class Matrix;
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} // namespace gfx
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/**
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* MotionRotateType: Enum to indicate the type of our "rotate" attribute.
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*/
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enum RotateType {
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eRotateType_Explicit, // for e.g. rotate="45"/"45deg"/"0.785rad"
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eRotateType_Auto, // for rotate="auto"
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eRotateType_AutoReverse // for rotate="auto-reverse"
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};
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/**
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* SVGMotionSMILType: Implements the nsISMILType interface for SMIL animations
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* from <animateMotion>.
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*
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* NOTE: Even though there's technically no "motion" attribute, we behave in
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* many ways as if there were, for simplicity.
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*/
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class SVGMotionSMILType : public nsISMILType
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{
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typedef mozilla::gfx::Path Path;
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public:
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// Singleton for nsSMILValue objects to hold onto.
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static SVGMotionSMILType sSingleton;
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protected:
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// nsISMILType Methods
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// -------------------
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virtual void Init(nsSMILValue& aValue) const override;
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virtual void Destroy(nsSMILValue& aValue) const override;
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virtual nsresult Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const override;
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virtual bool IsEqual(const nsSMILValue& aLeft,
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const nsSMILValue& aRight) const override;
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virtual nsresult Add(nsSMILValue& aDest,
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const nsSMILValue& aValueToAdd,
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uint32_t aCount) const override;
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virtual nsresult SandwichAdd(nsSMILValue& aDest,
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const nsSMILValue& aValueToAdd) const override;
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virtual nsresult ComputeDistance(const nsSMILValue& aFrom,
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const nsSMILValue& aTo,
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double& aDistance) const override;
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virtual nsresult Interpolate(const nsSMILValue& aStartVal,
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const nsSMILValue& aEndVal,
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double aUnitDistance,
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nsSMILValue& aResult) const override;
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public:
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// Used to generate a transform matrix from an <animateMotion> nsSMILValue.
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static gfx::Matrix CreateMatrix(const nsSMILValue& aSMILVal);
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// Used to generate a nsSMILValue for the point at the given distance along
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// the given path.
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static nsSMILValue ConstructSMILValue(Path* aPath,
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float aDist,
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RotateType aRotateType,
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float aRotateAngle);
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private:
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// Private constructor: prevent instances beyond my singleton.
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SVGMotionSMILType() {}
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};
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} // namespace mozilla
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#endif // MOZILLA_SVGMOTIONSMILTYPE_H_
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