tor-browser

The Tor Browser
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SVGNumberPairSMILType.cpp (3727B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "SVGNumberPairSMILType.h"
      8 
      9 #include "mozilla/SMILValue.h"
     10 #include "nsDebug.h"
     11 #include "nsMathUtils.h"
     12 
     13 namespace mozilla {
     14 
     15 /*static*/
     16 SVGNumberPairSMILType SVGNumberPairSMILType::sSingleton;
     17 
     18 void SVGNumberPairSMILType::InitValue(SMILValue& aValue) const {
     19  MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
     20 
     21  aValue.mU.mNumberPair[0] = 0;
     22  aValue.mU.mNumberPair[1] = 0;
     23  aValue.mType = this;
     24 }
     25 
     26 void SVGNumberPairSMILType::DestroyValue(SMILValue& aValue) const {
     27  MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value");
     28  aValue.mU.mNumberPair[0] = 0;
     29  aValue.mU.mNumberPair[1] = 0;
     30  aValue.mType = SMILNullType::Singleton();
     31 }
     32 
     33 nsresult SVGNumberPairSMILType::Assign(SMILValue& aDest,
     34                                       const SMILValue& aSrc) const {
     35  MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
     36  MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value");
     37 
     38  aDest.mU.mNumberPair[0] = aSrc.mU.mNumberPair[0];
     39  aDest.mU.mNumberPair[1] = aSrc.mU.mNumberPair[1];
     40  return NS_OK;
     41 }
     42 
     43 bool SVGNumberPairSMILType::IsEqual(const SMILValue& aLeft,
     44                                    const SMILValue& aRight) const {
     45  MOZ_ASSERT(aLeft.mType == aRight.mType, "Incompatible SMIL types");
     46  MOZ_ASSERT(aLeft.mType == this, "Unexpected type for SMIL value");
     47 
     48  return aLeft.mU.mNumberPair[0] == aRight.mU.mNumberPair[0] &&
     49         aLeft.mU.mNumberPair[1] == aRight.mU.mNumberPair[1];
     50 }
     51 
     52 nsresult SVGNumberPairSMILType::Add(SMILValue& aDest,
     53                                    const SMILValue& aValueToAdd,
     54                                    uint32_t aCount) const {
     55  MOZ_ASSERT(aValueToAdd.mType == aDest.mType, "Trying to add invalid types");
     56  MOZ_ASSERT(aValueToAdd.mType == this, "Unexpected source type");
     57 
     58  aDest.mU.mNumberPair[0] += aValueToAdd.mU.mNumberPair[0] * aCount;
     59  aDest.mU.mNumberPair[1] += aValueToAdd.mU.mNumberPair[1] * aCount;
     60 
     61  return NS_OK;
     62 }
     63 
     64 nsresult SVGNumberPairSMILType::ComputeDistance(const SMILValue& aFrom,
     65                                                const SMILValue& aTo,
     66                                                double& aDistance) const {
     67  MOZ_ASSERT(aFrom.mType == aTo.mType, "Trying to compare different types");
     68  MOZ_ASSERT(aFrom.mType == this, "Unexpected source type");
     69 
     70  double delta[2];
     71  delta[0] = aTo.mU.mNumberPair[0] - aFrom.mU.mNumberPair[0];
     72  delta[1] = aTo.mU.mNumberPair[1] - aFrom.mU.mNumberPair[1];
     73 
     74  aDistance = NS_hypot(delta[0], delta[1]);
     75  return NS_OK;
     76 }
     77 
     78 nsresult SVGNumberPairSMILType::Interpolate(const SMILValue& aStartVal,
     79                                            const SMILValue& aEndVal,
     80                                            double aUnitDistance,
     81                                            SMILValue& aResult) const {
     82  MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
     83             "Trying to interpolate different types");
     84  MOZ_ASSERT(aStartVal.mType == this, "Unexpected types for interpolation");
     85  MOZ_ASSERT(aResult.mType == this, "Unexpected result type");
     86 
     87  aResult.mU.mNumberPair[0] =
     88      float(aStartVal.mU.mNumberPair[0] +
     89            (aEndVal.mU.mNumberPair[0] - aStartVal.mU.mNumberPair[0]) *
     90                aUnitDistance);
     91  aResult.mU.mNumberPair[1] =
     92      float(aStartVal.mU.mNumberPair[1] +
     93            (aEndVal.mU.mNumberPair[1] - aStartVal.mU.mNumberPair[1]) *
     94                aUnitDistance);
     95  return NS_OK;
     96 }
     97 
     98 }  // namespace mozilla