зеркало из https://github.com/mozilla/gecko-dev.git
94 строки
2.9 KiB
C++
94 строки
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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 "nsSMILFloatType.h"
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#include "nsSMILValue.h"
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#include "nsDebug.h"
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#include <math.h>
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/*static*/ nsSMILFloatType nsSMILFloatType::sSingleton;
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void
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nsSMILFloatType::Init(nsSMILValue& aValue) const
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{
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NS_PRECONDITION(aValue.IsNull(), "Unexpected value type");
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aValue.mU.mDouble = 0.0;
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aValue.mType = this;
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}
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void
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nsSMILFloatType::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.mDouble = 0.0;
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aValue.mType = &nsSMILNullType::sSingleton;
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}
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nsresult
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nsSMILFloatType::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.mDouble = aSrc.mU.mDouble;
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return NS_OK;
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}
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bool
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nsSMILFloatType::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.mDouble == aRight.mU.mDouble;
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}
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nsresult
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nsSMILFloatType::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.mDouble += aValueToAdd.mU.mDouble * aCount;
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return NS_OK;
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}
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nsresult
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nsSMILFloatType::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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const double &from = aFrom.mU.mDouble;
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const double &to = aTo.mU.mDouble;
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aDistance = fabs(to - from);
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return NS_OK;
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}
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nsresult
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nsSMILFloatType::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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const double &startVal = aStartVal.mU.mDouble;
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const double &endVal = aEndVal.mU.mDouble;
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aResult.mU.mDouble = (startVal + (endVal - startVal) * aUnitDistance);
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return NS_OK;
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}
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