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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/. */
/* implementation of nsISMILType for use by <animateMotion> element */
#ifndef MOZILLA_SVGMOTIONSMILTYPE_H_
#define MOZILLA_SVGMOTIONSMILTYPE_H_
#include "mozilla/gfx/2D.h"
#include "mozilla/Attributes.h"
#include "nsISMILType.h"
class nsSMILValue;
namespace mozilla {
namespace gfx {
class Matrix;
} // namespace gfx
/**
* 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 nsISMILType 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 nsISMILType
{
typedef mozilla::gfx::Path Path;
public:
// Singleton for nsSMILValue objects to hold onto.
static SVGMotionSMILType 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;
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 SandwichAdd(nsSMILValue& aDest,
const nsSMILValue& aValueToAdd) 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;
public:
// Used to generate a transform matrix from an <animateMotion> nsSMILValue.
static gfx::Matrix CreateMatrix(const nsSMILValue& aSMILVal);
// Used to generate a nsSMILValue for the point at the given distance along
// the given path.
static nsSMILValue ConstructSMILValue(Path* aPath,
float aDist,
RotateType aRotateType,
float aRotateAngle);
private:
// Private constructor: prevent instances beyond my singleton.
constexpr SVGMotionSMILType() {}
};
} // namespace mozilla
#endif // MOZILLA_SVGMOTIONSMILTYPE_H_
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