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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 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_
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