gecko/dom/svg/SVGNumberPairSMILType.cpp
2015-05-03 15:32:37 -04:00

109 lines
3.6 KiB
C++

/* -*- 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "SVGNumberPairSMILType.h"
#include "nsSMILValue.h"
#include "nsMathUtils.h"
#include "nsDebug.h"
namespace mozilla {
/*static*/ SVGNumberPairSMILType SVGNumberPairSMILType::sSingleton;
void
SVGNumberPairSMILType::Init(nsSMILValue& aValue) const
{
MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
aValue.mU.mNumberPair[0] = 0;
aValue.mU.mNumberPair[1] = 0;
aValue.mType = this;
}
void
SVGNumberPairSMILType::Destroy(nsSMILValue& aValue) const
{
NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value");
aValue.mU.mNumberPair[0] = 0;
aValue.mU.mNumberPair[1] = 0;
aValue.mType = nsSMILNullType::Singleton();
}
nsresult
SVGNumberPairSMILType::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.mNumberPair[0] = aSrc.mU.mNumberPair[0];
aDest.mU.mNumberPair[1] = aSrc.mU.mNumberPair[1];
return NS_OK;
}
bool
SVGNumberPairSMILType::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.mNumberPair[0] == aRight.mU.mNumberPair[0] &&
aLeft.mU.mNumberPair[1] == aRight.mU.mNumberPair[1];
}
nsresult
SVGNumberPairSMILType::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.mNumberPair[0] += aValueToAdd.mU.mNumberPair[0] * aCount;
aDest.mU.mNumberPair[1] += aValueToAdd.mU.mNumberPair[1] * aCount;
return NS_OK;
}
nsresult
SVGNumberPairSMILType::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.mNumberPair[0] - aFrom.mU.mNumberPair[0];
delta[1] = aTo.mU.mNumberPair[1] - aFrom.mU.mNumberPair[1];
aDistance = NS_hypot(delta[0], delta[1]);
return NS_OK;
}
nsresult
SVGNumberPairSMILType::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");
aResult.mU.mNumberPair[0] =
float(aStartVal.mU.mNumberPair[0] +
(aEndVal.mU.mNumberPair[0] - aStartVal.mU.mNumberPair[0]) * aUnitDistance);
aResult.mU.mNumberPair[1] =
float(aStartVal.mU.mNumberPair[1] +
(aEndVal.mU.mNumberPair[1] - aStartVal.mU.mNumberPair[1]) * aUnitDistance);
return NS_OK;
}
} // namespace mozilla