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