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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "SVGOrientSMILType.h"
#include "nsSMILValue.h"
#include "nsSVGAngle.h"
#include "nsDebug.h"
#include "mozilla/dom/SVGMarkerElement.h"
#include <math.h>
namespace mozilla {
/*static*/ SVGOrientSMILType SVGOrientSMILType::sSingleton;
void
SVGOrientSMILType::Init(nsSMILValue& 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 = dom::SVG_MARKER_ORIENT_ANGLE;
aValue.mType = this;
}
void
SVGOrientSMILType::Destroy(nsSMILValue& aValue) const
{
NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value.");
aValue.mU.mPtr = nullptr;
aValue.mType = nsSMILNullType::Singleton();
}
nsresult
SVGOrientSMILType::Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const
{
NS_PRECONDITION(aDest.mType == aSrc.mType, "Incompatible SMIL types.");
NS_PRECONDITION(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 nsSMILValue& aLeft,
const nsSMILValue& aRight) const
{
NS_PRECONDITION(aLeft.mType == aRight.mType, "Incompatible SMIL types");
NS_PRECONDITION(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;
}
nsresult
SVGOrientSMILType::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
uint32_t aCount) const
{
NS_PRECONDITION(aValueToAdd.mType == aDest.mType,
"Trying to add invalid types");
NS_PRECONDITION(aValueToAdd.mType == this, "Unexpected source type");
if (aDest.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE ||
aValueToAdd.mU.mOrient.mOrientType != dom::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 = aDest.mU.mOrient.mAngle *
nsSVGAngle::GetDegreesPerUnit(aDest.mU.mOrient.mUnit);
float angleToAdd = aValueToAdd.mU.mOrient.mAngle *
nsSVGAngle::GetDegreesPerUnit(aValueToAdd.mU.mOrient.mUnit) *
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) /
nsSVGAngle::GetDegreesPerUnit(aValueToAdd.mU.mOrient.mUnit);
aDest.mU.mOrient.mUnit = aValueToAdd.mU.mOrient.mUnit;
return NS_OK;
}
nsresult
SVGOrientSMILType::ComputeDistance(const nsSMILValue& aFrom,
const nsSMILValue& aTo,
double& aDistance) const
{
NS_PRECONDITION(aFrom.mType == aTo.mType,"Trying to compare different types");
NS_PRECONDITION(aFrom.mType == this, "Unexpected source type");
if (aFrom.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE ||
aTo.mU.mOrient.mOrientType != dom::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:
double from = aFrom.mU.mOrient.mAngle *
nsSVGAngle::GetDegreesPerUnit(aFrom.mU.mOrient.mUnit);
double to = aTo.mU.mOrient.mAngle *
nsSVGAngle::GetDegreesPerUnit(aTo.mU.mOrient.mUnit);
aDistance = fabs(to - from);
return NS_OK;
}
nsresult
SVGOrientSMILType::Interpolate(const nsSMILValue& aStartVal,
const nsSMILValue& aEndVal,
double aUnitDistance,
nsSMILValue& aResult) const
{
NS_PRECONDITION(aStartVal.mType == aEndVal.mType,
"Trying to interpolate different types");
NS_PRECONDITION(aStartVal.mType == this,
"Unexpected types for interpolation.");
NS_PRECONDITION(aResult.mType == this, "Unexpected result type.");
if (aStartVal.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE ||
aEndVal.mU.mOrient.mOrientType != dom::SVG_MARKER_ORIENT_ANGLE) {
// TODO: it would be nice to be able to handle auto angles too.
return NS_ERROR_FAILURE;
}
float start = aStartVal.mU.mOrient.mAngle *
nsSVGAngle::GetDegreesPerUnit(aStartVal.mU.mOrient.mUnit);
float end = aEndVal.mU.mOrient.mAngle *
nsSVGAngle::GetDegreesPerUnit(aEndVal.mU.mOrient.mUnit);
float result = (start + (end - start) * aUnitDistance);
// Again, we use the unit of the to/by value for the result:
aResult.mU.mOrient.mAngle = result /
nsSVGAngle::GetDegreesPerUnit(aEndVal.mU.mOrient.mUnit);
aResult.mU.mOrient.mUnit = aEndVal.mU.mOrient.mUnit;
return NS_OK;
}
} // namespace mozilla
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