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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
#include "SVGOrientSMILType.h"
#include "mozilla/SMILValue.h"
#include "mozilla/dom/SVGMarkerElement.h"
#include "nsDebug.h"
#include "SVGAnimatedOrient.h"
#include <math.h>
namespace mozilla {
using namespace dom::SVGAngle_Binding;
using namespace dom::SVGMarkerElement_Binding;
/*static*/
SVGOrientSMILType SVGOrientSMILType::sSingleton;
void SVGOrientSMILType::Init(SMILValue& aValue) const {
MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
aValue.mU.mOrient.mAngle = 0.0f;
aValue.mU.mOrient.mUnit = SVG_ANGLETYPE_UNSPECIFIED;
aValue.mU.mOrient.mOrientType = SVG_MARKER_ORIENT_ANGLE;
aValue.mType = this;
}
void SVGOrientSMILType::Destroy(SMILValue& aValue) const {
MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value.");
aValue.mU.mPtr = nullptr;
aValue.mType = SMILNullType::Singleton();
}
nsresult SVGOrientSMILType::Assign(SMILValue& aDest,
const SMILValue& aSrc) const {
MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types.");
MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value.");
aDest.mU.mOrient.mAngle = aSrc.mU.mOrient.mAngle;
aDest.mU.mOrient.mUnit = aSrc.mU.mOrient.mUnit;
aDest.mU.mOrient.mOrientType = aSrc.mU.mOrient.mOrientType;
return NS_OK;
}
bool SVGOrientSMILType::IsEqual(const SMILValue& aLeft,
const SMILValue& aRight) const {
MOZ_ASSERT(aLeft.mType == aRight.mType, "Incompatible SMIL types");
MOZ_ASSERT(aLeft.mType == this, "Unexpected type for SMIL value");
return aLeft.mU.mOrient.mAngle == aRight.mU.mOrient.mAngle &&
aLeft.mU.mOrient.mUnit == aRight.mU.mOrient.mUnit &&
aLeft.mU.mOrient.mOrientType == aRight.mU.mOrient.mOrientType;
}
static float ValueInDegrees(const SMILValue& aValue) {
MOZ_ASSERT(aValue.mU.mOrient.mOrientType == SVG_MARKER_ORIENT_ANGLE);
return aValue.mU.mOrient.mAngle == 0.0f
? 0.0f
: aValue.mU.mOrient.mAngle * SVGAnimatedOrient::GetDegreesPerUnit(
aValue.mU.mOrient.mUnit);
}
nsresult SVGOrientSMILType::Add(SMILValue& aDest, const SMILValue& aValueToAdd,
uint32_t aCount) const {
MOZ_ASSERT(aValueToAdd.mType == aDest.mType, "Trying to add invalid types");
MOZ_ASSERT(aValueToAdd.mType == this, "Unexpected source type");
if (aDest.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE ||
aValueToAdd.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE) {
// TODO: it would be nice to be able to add to auto angles
return NS_ERROR_FAILURE;
}
// We may be dealing with two different angle units, so we normalize to
// degrees for the add:
float currentAngle = ValueInDegrees(aDest);
float angleToAdd = ValueInDegrees(aValueToAdd) * aCount;
// And then we give the resulting animated value the same units as the value
// that we're animating to/by (i.e. the same as aValueToAdd):
aDest.mU.mOrient.mAngle =
(currentAngle + angleToAdd) /
SVGAnimatedOrient::GetDegreesPerUnit(aValueToAdd.mU.mOrient.mUnit);
aDest.mU.mOrient.mUnit = aValueToAdd.mU.mOrient.mUnit;
return NS_OK;
}
nsresult SVGOrientSMILType::ComputeDistance(const SMILValue& aFrom,
const SMILValue& aTo,
double& aDistance) const {
MOZ_ASSERT(aFrom.mType == aTo.mType, "Trying to compare different types");
MOZ_ASSERT(aFrom.mType == this, "Unexpected source type");
if (aFrom.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE ||
aTo.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE) {
// TODO: it would be nice to be able to compute distance with auto angles
return NS_ERROR_FAILURE;
}
// Normalize both to degrees in case they're different angle units:
aDistance = fabs(ValueInDegrees(aTo) - ValueInDegrees(aFrom));
return NS_OK;
}
nsresult SVGOrientSMILType::Interpolate(const SMILValue& aStartVal,
const SMILValue& aEndVal,
double aUnitDistance,
SMILValue& aResult) const {
MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
"Trying to interpolate different types");
MOZ_ASSERT(aStartVal.mType == this, "Unexpected types for interpolation.");
MOZ_ASSERT(aResult.mType == this, "Unexpected result type.");
if (aStartVal.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE ||
aEndVal.mU.mOrient.mOrientType != SVG_MARKER_ORIENT_ANGLE) {
// TODO: it would be nice to be able to handle auto angles too.
return NS_ERROR_FAILURE;
}
float start = ValueInDegrees(aStartVal);
float end = ValueInDegrees(aEndVal);
float result = (start + (end - start) * aUnitDistance);
// we use the unit of the nearest value for the result:
if (aUnitDistance > 0.5) {
aResult.mU.mOrient.mAngle =
result / SVGAnimatedOrient::GetDegreesPerUnit(aEndVal.mU.mOrient.mUnit);
aResult.mU.mOrient.mUnit = aEndVal.mU.mOrient.mUnit;
} else {
aResult.mU.mOrient.mAngle = result / SVGAnimatedOrient::GetDegreesPerUnit(
aStartVal.mU.mOrient.mUnit);
aResult.mU.mOrient.mUnit = aStartVal.mU.mOrient.mUnit;
}
return NS_OK;
}
} // namespace mozilla