michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsSMILNullType.h"
michael@0: #include "nsSMILValue.h"
michael@0: #include "nsDebug.h"
michael@0: 
michael@0: nsresult
michael@0: nsSMILNullType::Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const
michael@0: {
michael@0:   NS_PRECONDITION(aDest.mType == aSrc.mType, "Incompatible SMIL types");
michael@0:   NS_PRECONDITION(aSrc.mType == this, "Unexpected source type");
michael@0:   aDest.mU    = aSrc.mU;
michael@0:   aDest.mType = Singleton();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: bool
michael@0: nsSMILNullType::IsEqual(const nsSMILValue& aLeft,
michael@0:                         const nsSMILValue& aRight) const
michael@0: {
michael@0:   NS_PRECONDITION(aLeft.mType == aRight.mType, "Incompatible SMIL types");
michael@0:   NS_PRECONDITION(aLeft.mType == this, "Unexpected type for SMIL value");
michael@0: 
michael@0:   return true;  // All null-typed values are equivalent.
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsSMILNullType::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
michael@0:                     uint32_t aCount) const
michael@0: {
michael@0:   NS_NOTREACHED("Adding NULL type");
michael@0:   return NS_ERROR_FAILURE;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsSMILNullType::ComputeDistance(const nsSMILValue& aFrom,
michael@0:                                 const nsSMILValue& aTo,
michael@0:                                 double& aDistance) const
michael@0: {
michael@0:   NS_NOTREACHED("Computing distance for NULL type");
michael@0:   return NS_ERROR_FAILURE;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsSMILNullType::Interpolate(const nsSMILValue& aStartVal,
michael@0:                             const nsSMILValue& aEndVal,
michael@0:                             double aUnitDistance,
michael@0:                             nsSMILValue& aResult) const
michael@0: {
michael@0:   NS_NOTREACHED("Interpolating NULL type");
michael@0:   return NS_ERROR_FAILURE;
michael@0: }