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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 "nsSMILFloatType.h"
#include "nsSMILValue.h"
#include "nsDebug.h"
#include <math.h>
void
nsSMILFloatType::Init(nsSMILValue& aValue) const
{
NS_PRECONDITION(aValue.IsNull(), "Unexpected value type");
aValue.mU.mDouble = 0.0;
aValue.mType = this;
}
void
nsSMILFloatType::Destroy(nsSMILValue& aValue) const
{
NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value");
aValue.mU.mDouble = 0.0;
aValue.mType = nsSMILNullType::Singleton();
}
nsresult
nsSMILFloatType::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.mDouble = aSrc.mU.mDouble;
return NS_OK;
}
bool
nsSMILFloatType::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.mDouble == aRight.mU.mDouble;
}
nsresult
nsSMILFloatType::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");
aDest.mU.mDouble += aValueToAdd.mU.mDouble * aCount;
return NS_OK;
}
nsresult
nsSMILFloatType::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");
const double &from = aFrom.mU.mDouble;
const double &to = aTo.mU.mDouble;
aDistance = fabs(to - from);
return NS_OK;
}
nsresult
nsSMILFloatType::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");
const double &startVal = aStartVal.mU.mDouble;
const double &endVal = aEndVal.mU.mDouble;
aResult.mU.mDouble = (startVal + (endVal - startVal) * aUnitDistance);
return NS_OK;
}
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