gecko/dom/svg/SVGIntegerPairSMILType.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2012-05-21 04:12:37 -07:00
/* 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 "SVGIntegerPairSMILType.h"
#include "nsSMILValue.h"
#include "nsMathUtils.h"
#include "nsDebug.h"
namespace mozilla {
void
SVGIntegerPairSMILType::Init(nsSMILValue& aValue) const
{
NS_ABORT_IF_FALSE(aValue.IsNull(), "Unexpected value type");
aValue.mU.mIntPair[0] = 0;
aValue.mU.mIntPair[1] = 0;
aValue.mType = this;
}
void
SVGIntegerPairSMILType::Destroy(nsSMILValue& aValue) const
{
NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value");
aValue.mU.mIntPair[0] = 0;
aValue.mU.mIntPair[1] = 0;
aValue.mType = nsSMILNullType::Singleton();
}
nsresult
SVGIntegerPairSMILType::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.mIntPair[0] = aSrc.mU.mIntPair[0];
aDest.mU.mIntPair[1] = aSrc.mU.mIntPair[1];
return NS_OK;
}
bool
SVGIntegerPairSMILType::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.mIntPair[0] == aRight.mU.mIntPair[0] &&
aLeft.mU.mIntPair[1] == aRight.mU.mIntPair[1];
}
nsresult
SVGIntegerPairSMILType::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.mIntPair[0] += aValueToAdd.mU.mIntPair[0] * aCount;
aDest.mU.mIntPair[1] += aValueToAdd.mU.mIntPair[1] * aCount;
return NS_OK;
}
nsresult
SVGIntegerPairSMILType::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");
double delta[2];
delta[0] = aTo.mU.mIntPair[0] - aFrom.mU.mIntPair[0];
delta[1] = aTo.mU.mIntPair[1] - aFrom.mU.mIntPair[1];
aDistance = NS_hypot(delta[0], delta[1]);
return NS_OK;
}
nsresult
SVGIntegerPairSMILType::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");
double currentVal[2];
currentVal[0] = aStartVal.mU.mIntPair[0] +
(aEndVal.mU.mIntPair[0] - aStartVal.mU.mIntPair[0]) * aUnitDistance;
currentVal[1] = aStartVal.mU.mIntPair[1] +
(aEndVal.mU.mIntPair[1] - aStartVal.mU.mIntPair[1]) * aUnitDistance;
aResult.mU.mIntPair[0] = NS_lround(currentVal[0]);
aResult.mU.mIntPair[1] = NS_lround(currentVal[1]);
return NS_OK;
}
} // namespace mozilla