tor-browser

The Tor Browser
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SVGPathSegListSMILType.cpp (4596B)

      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 "SVGPathSegListSMILType.h"
      8 
      9 #include "SVGPathData.h"
     10 #include "SVGPathSegUtils.h"
     11 #include "mozilla/SMILValue.h"
     12 
     13 namespace mozilla {
     14 
     15 //----------------------------------------------------------------------
     16 // nsISMILType implementation
     17 
     18 void SVGPathSegListSMILType::InitValue(SMILValue& aValue) const {
     19  MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
     20  aValue.mU.mPtr = new SVGPathDataAndInfo();
     21  aValue.mType = this;
     22 }
     23 
     24 void SVGPathSegListSMILType::DestroyValue(SMILValue& aValue) const {
     25  MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value type");
     26  delete static_cast<SVGPathDataAndInfo*>(aValue.mU.mPtr);
     27  aValue.mU.mPtr = nullptr;
     28  aValue.mType = SMILNullType::Singleton();
     29 }
     30 
     31 nsresult SVGPathSegListSMILType::Assign(SMILValue& aDest,
     32                                        const SMILValue& aSrc) const {
     33  MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
     34  MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value");
     35 
     36  const SVGPathDataAndInfo* src =
     37      static_cast<const SVGPathDataAndInfo*>(aSrc.mU.mPtr);
     38  SVGPathDataAndInfo* dest = static_cast<SVGPathDataAndInfo*>(aDest.mU.mPtr);
     39  dest->CopyFrom(*src);
     40  return NS_OK;
     41 }
     42 
     43 bool SVGPathSegListSMILType::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 *static_cast<const SVGPathDataAndInfo*>(aLeft.mU.mPtr) ==
     49         *static_cast<const SVGPathDataAndInfo*>(aRight.mU.mPtr);
     50 }
     51 
     52 nsresult SVGPathSegListSMILType::Add(SMILValue& aDest,
     53                                     const SMILValue& aValueToAdd,
     54                                     uint32_t aCount) const {
     55  MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL type");
     56  MOZ_ASSERT(aValueToAdd.mType == this, "Incompatible SMIL type");
     57 
     58  SVGPathDataAndInfo& dest = *static_cast<SVGPathDataAndInfo*>(aDest.mU.mPtr);
     59  const SVGPathDataAndInfo& valueToAdd =
     60      *static_cast<const SVGPathDataAndInfo*>(aValueToAdd.mU.mPtr);
     61 
     62  if (valueToAdd.IsIdentity()) {  // Adding identity value - no-op
     63    return NS_OK;
     64  }
     65 
     66  if (dest.IsIdentity()) {
     67    dest.CopyFrom(valueToAdd);
     68    aCount--;
     69  }
     70 
     71  if (aCount &&
     72      !Servo_SVGPathData_Add(&dest.RawData(), &valueToAdd.RawData(), aCount)) {
     73    // SVGContentUtils::ReportToConsole - can't add path segment lists with
     74    // different numbers of segments, with arcs that have different flag
     75    // values, or with incompatible segment types.
     76    return NS_ERROR_FAILURE;
     77  }
     78  return NS_OK;
     79 }
     80 
     81 nsresult SVGPathSegListSMILType::ComputeDistance(const SMILValue& aFrom,
     82                                                 const SMILValue& aTo,
     83                                                 double& aDistance) const {
     84  MOZ_ASSERT(aFrom.mType == this, "Unexpected SMIL type");
     85  MOZ_ASSERT(aTo.mType == this, "Incompatible SMIL type");
     86 
     87  // See https://bugzilla.mozilla.org/show_bug.cgi?id=522306#c18
     88 
     89  // SVGContentUtils::ReportToConsole
     90  return NS_ERROR_NOT_IMPLEMENTED;
     91 }
     92 
     93 nsresult SVGPathSegListSMILType::Interpolate(const SMILValue& aStartVal,
     94                                             const SMILValue& aEndVal,
     95                                             double aUnitDistance,
     96                                             SMILValue& aResult) const {
     97  MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
     98             "Trying to interpolate different types");
     99  MOZ_ASSERT(aStartVal.mType == this, "Unexpected types for interpolation");
    100  MOZ_ASSERT(aResult.mType == this, "Unexpected result type");
    101 
    102  const SVGPathDataAndInfo& start =
    103      *static_cast<const SVGPathDataAndInfo*>(aStartVal.mU.mPtr);
    104  const SVGPathDataAndInfo& end =
    105      *static_cast<const SVGPathDataAndInfo*>(aEndVal.mU.mPtr);
    106  SVGPathDataAndInfo& result =
    107      *static_cast<SVGPathDataAndInfo*>(aResult.mU.mPtr);
    108  MOZ_ASSERT(result.IsIdentity(),
    109             "expecting outparam to start out as identity");
    110  result.SetElement(end.Element());
    111  if (!Servo_SVGPathData_Interpolate(
    112          start.IsIdentity() ? nullptr : &start.RawData(), &end.RawData(),
    113          aUnitDistance, &result.RawData())) {
    114    return NS_ERROR_FAILURE;
    115  }
    116  return NS_OK;
    117 }
    118 
    119 }  // namespace mozilla