108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "SVGNumberPairSMILType.h"
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#include "nsSMILValue.h"
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#include "nsMathUtils.h"
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#include "nsDebug.h"
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namespace mozilla {
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/*static*/ SVGNumberPairSMILType SVGNumberPairSMILType::sSingleton;
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void
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SVGNumberPairSMILType::Init(nsSMILValue& aValue) const
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{
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MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
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aValue.mU.mNumberPair[0] = 0;
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aValue.mU.mNumberPair[1] = 0;
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aValue.mType = this;
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}
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void
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SVGNumberPairSMILType::Destroy(nsSMILValue& aValue) const
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{
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NS_PRECONDITION(aValue.mType == this, "Unexpected SMIL value");
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aValue.mU.mNumberPair[0] = 0;
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aValue.mU.mNumberPair[1] = 0;
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aValue.mType = nsSMILNullType::Singleton();
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}
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nsresult
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SVGNumberPairSMILType::Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const
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{
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NS_PRECONDITION(aDest.mType == aSrc.mType, "Incompatible SMIL types");
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NS_PRECONDITION(aDest.mType == this, "Unexpected SMIL value");
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aDest.mU.mNumberPair[0] = aSrc.mU.mNumberPair[0];
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aDest.mU.mNumberPair[1] = aSrc.mU.mNumberPair[1];
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return NS_OK;
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}
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bool
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SVGNumberPairSMILType::IsEqual(const nsSMILValue& aLeft,
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const nsSMILValue& aRight) const
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{
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NS_PRECONDITION(aLeft.mType == aRight.mType, "Incompatible SMIL types");
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NS_PRECONDITION(aLeft.mType == this, "Unexpected type for SMIL value");
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return aLeft.mU.mNumberPair[0] == aRight.mU.mNumberPair[0] &&
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aLeft.mU.mNumberPair[1] == aRight.mU.mNumberPair[1];
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}
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nsresult
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SVGNumberPairSMILType::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
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uint32_t aCount) const
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{
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NS_PRECONDITION(aValueToAdd.mType == aDest.mType,
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"Trying to add invalid types");
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NS_PRECONDITION(aValueToAdd.mType == this, "Unexpected source type");
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aDest.mU.mNumberPair[0] += aValueToAdd.mU.mNumberPair[0] * aCount;
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aDest.mU.mNumberPair[1] += aValueToAdd.mU.mNumberPair[1] * aCount;
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return NS_OK;
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}
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nsresult
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SVGNumberPairSMILType::ComputeDistance(const nsSMILValue& aFrom,
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const nsSMILValue& aTo,
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double& aDistance) const
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{
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NS_PRECONDITION(aFrom.mType == aTo.mType,"Trying to compare different types");
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NS_PRECONDITION(aFrom.mType == this, "Unexpected source type");
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double delta[2];
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delta[0] = aTo.mU.mNumberPair[0] - aFrom.mU.mNumberPair[0];
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delta[1] = aTo.mU.mNumberPair[1] - aFrom.mU.mNumberPair[1];
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aDistance = NS_hypot(delta[0], delta[1]);
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return NS_OK;
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}
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nsresult
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SVGNumberPairSMILType::Interpolate(const nsSMILValue& aStartVal,
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const nsSMILValue& aEndVal,
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double aUnitDistance,
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nsSMILValue& aResult) const
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{
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NS_PRECONDITION(aStartVal.mType == aEndVal.mType,
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"Trying to interpolate different types");
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NS_PRECONDITION(aStartVal.mType == this,
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"Unexpected types for interpolation");
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NS_PRECONDITION(aResult.mType == this, "Unexpected result type");
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aResult.mU.mNumberPair[0] =
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float(aStartVal.mU.mNumberPair[0] +
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(aEndVal.mU.mNumberPair[0] - aStartVal.mU.mNumberPair[0]) * aUnitDistance);
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aResult.mU.mNumberPair[1] =
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float(aStartVal.mU.mNumberPair[1] +
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(aEndVal.mU.mNumberPair[1] - aStartVal.mU.mNumberPair[1]) * aUnitDistance);
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return NS_OK;
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}
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} // namespace mozilla
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