gecko-dev/content/smil/nsSMILNullType.cpp

58 строки
1.8 KiB
C++

/* -*- Mode: C++; tab-width: 2; 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 "nsSMILNullType.h"
#include "nsSMILValue.h"
#include "nsDebug.h"
/*static*/ nsSMILNullType nsSMILNullType::sSingleton;
nsresult
nsSMILNullType::Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const
{
NS_PRECONDITION(aDest.mType == aSrc.mType, "Incompatible SMIL types");
NS_PRECONDITION(aSrc.mType == this, "Unexpected source type");
aDest.mU = aSrc.mU;
aDest.mType = &sSingleton;
return NS_OK;
}
bool
nsSMILNullType::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 true; // All null-typed values are equivalent.
}
nsresult
nsSMILNullType::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
PRUint32 aCount) const
{
NS_NOTREACHED("Adding NULL type");
return NS_ERROR_FAILURE;
}
nsresult
nsSMILNullType::ComputeDistance(const nsSMILValue& aFrom,
const nsSMILValue& aTo,
double& aDistance) const
{
NS_NOTREACHED("Computing distance for NULL type");
return NS_ERROR_FAILURE;
}
nsresult
nsSMILNullType::Interpolate(const nsSMILValue& aStartVal,
const nsSMILValue& aEndVal,
double aUnitDistance,
nsSMILValue& aResult) const
{
NS_NOTREACHED("Interpolating NULL type");
return NS_ERROR_FAILURE;
}