Add m-esr52 at 52.6.0

1 files changed, 516 insertions, 0 deletions

diff --git a/dom/svg/nsSVGPathDataParser.cpp b/dom/svg/nsSVGPathDataParser.cpp
new file mode 100644
index 0000000000..8ab5268201
--- /dev/null
+++ b/dom/svg/nsSVGPathDataParser.cpp
@@ -0,0 +1,516 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsSVGPathDataParser.h"
+
+#include "mozilla/gfx/Point.h"
+#include "nsSVGDataParser.h"
+#include "SVGContentUtils.h"
+#include "SVGPathData.h"
+#include "SVGPathSegUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+static inline char16_t ToUpper(char16_t aCh)
+{
+  return aCh >= 'a' && aCh <= 'z' ? aCh - 'a' + 'A' : aCh;
+}
+
+bool
+nsSVGPathDataParser::Parse()
+{
+  mPathSegList->Clear();
+  return ParsePath();
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseCoordPair(float& aX, float& aY)
+{
+  return SVGContentUtils::ParseNumber(mIter, mEnd, aX) &&
+         SkipCommaWsp() &&
+         SVGContentUtils::ParseNumber(mIter, mEnd, aY);
+}
+
+bool
+nsSVGPathDataParser::ParseFlag(bool& aFlag)
+{
+  if (mIter == mEnd || (*mIter != '0' && *mIter != '1')) {
+    return false;
+  }
+  aFlag = (*mIter == '1');
+
+  ++mIter;
+  return true;
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParsePath()
+{
+  while (SkipWsp()) {
+    if (!ParseSubPath()) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseSubPath()
+{
+  return ParseMoveto() && ParseSubPathElements();
+}
+
+bool
+nsSVGPathDataParser::ParseSubPathElements()
+{
+  while (SkipWsp() && !IsStartOfSubPath()) {
+    char16_t commandType = ToUpper(*mIter);
+
+    // Upper case commands have absolute co-ordinates,
+    // lower case commands have relative co-ordinates.
+    bool absCoords = commandType == *mIter;
+
+    ++mIter;
+    SkipWsp();
+
+    if (!ParseSubPathElement(commandType, absCoords)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+bool
+nsSVGPathDataParser::ParseSubPathElement(char16_t aCommandType,
+                                         bool aAbsCoords)
+{
+  switch (aCommandType) {
+    case 'Z':
+      return ParseClosePath();
+    case 'L':
+      return ParseLineto(aAbsCoords);
+    case 'H':
+      return ParseHorizontalLineto(aAbsCoords);
+    case 'V':
+      return ParseVerticalLineto(aAbsCoords);
+    case 'C':
+      return ParseCurveto(aAbsCoords);
+    case 'S':
+      return ParseSmoothCurveto(aAbsCoords);
+    case 'Q':
+      return ParseQuadBezierCurveto(aAbsCoords);
+    case 'T':
+      return ParseSmoothQuadBezierCurveto(aAbsCoords);
+    case 'A':
+      return ParseEllipticalArc(aAbsCoords);
+  }
+  return false;
+}
+
+bool
+nsSVGPathDataParser::IsStartOfSubPath() const
+{
+  return *mIter == 'm' || *mIter == 'M';
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseMoveto()
+{
+  if (!IsStartOfSubPath()) {
+    return false;
+  }
+
+  bool absCoords = (*mIter == 'M');
+
+  ++mIter;
+  SkipWsp();
+
+  float x, y;
+  if (!ParseCoordPair(x, y)) {
+    return false;
+  }
+
+  if (NS_FAILED(mPathSegList->AppendSeg(
+                  absCoords ? PATHSEG_MOVETO_ABS : PATHSEG_MOVETO_REL,
+                  x, y))) {
+    return false;
+  }
+
+  if (!SkipWsp() || IsAlpha(*mIter)) {
+    // End of data, or start of a new command
+    return true;
+  }
+
+  SkipCommaWsp();
+
+  // Per SVG 1.1 Section 8.3.2
+  // If a moveto is followed by multiple pairs of coordinates,
+  // the subsequent pairs are treated as implicit lineto commands
+  return ParseLineto(absCoords);
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseClosePath()
+{
+  return NS_SUCCEEDED(mPathSegList->AppendSeg(PATHSEG_CLOSEPATH));
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseLineto(bool aAbsCoords)
+{
+  while (true) {
+    float x, y;
+    if (!ParseCoordPair(x, y)) {
+      return false;
+    }
+
+    if (NS_FAILED(mPathSegList->AppendSeg(
+                   aAbsCoords ? PATHSEG_LINETO_ABS : PATHSEG_LINETO_REL,
+                   x, y))) {
+      return false;
+    }
+
+    if (!SkipWsp() || IsAlpha(*mIter)) {
+      // End of data, or start of a new command
+      return true;
+    }
+    SkipCommaWsp();
+  }
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseHorizontalLineto(bool aAbsCoords)
+{
+  while (true) {
+    float x;
+    if (!SVGContentUtils::ParseNumber(mIter, mEnd, x)) {
+      return false;
+    }
+
+    if (NS_FAILED(mPathSegList->AppendSeg(
+                    aAbsCoords ? PATHSEG_LINETO_HORIZONTAL_ABS : PATHSEG_LINETO_HORIZONTAL_REL,
+                    x))) {
+      return false;
+    }
+
+    if (!SkipWsp() || IsAlpha(*mIter)) {
+      // End of data, or start of a new command
+      return true;
+    }
+    SkipCommaWsp();
+  }
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseVerticalLineto(bool aAbsCoords)
+{
+  while (true) {
+    float y;
+    if (!SVGContentUtils::ParseNumber(mIter, mEnd, y)) {
+      return false;
+    }
+
+    if (NS_FAILED(mPathSegList->AppendSeg(
+                    aAbsCoords ? PATHSEG_LINETO_VERTICAL_ABS : PATHSEG_LINETO_VERTICAL_REL,
+                    y))) {
+      return false;
+    }
+
+    if (!SkipWsp() || IsAlpha(*mIter)) {
+      // End of data, or start of a new command
+      return true;
+    }
+    SkipCommaWsp();
+  }
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseCurveto(bool aAbsCoords)
+{
+  while (true) {
+    float x1, y1, x2, y2, x, y;
+
+    if (!(ParseCoordPair(x1, y1) &&
+          SkipCommaWsp() &&
+          ParseCoordPair(x2, y2) &&
+          SkipCommaWsp() &&
+          ParseCoordPair(x, y))) {
+      return false;
+    }
+
+    if (NS_FAILED(mPathSegList->AppendSeg(
+                    aAbsCoords ? PATHSEG_CURVETO_CUBIC_ABS : PATHSEG_CURVETO_CUBIC_REL,
+                    x1, y1, x2, y2, x, y))) {
+      return false;
+    }
+
+    if (!SkipWsp() || IsAlpha(*mIter)) {
+      // End of data, or start of a new command
+      return true;
+    }
+    SkipCommaWsp();
+  }
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseSmoothCurveto(bool aAbsCoords)
+{
+  while (true) {
+    float x2, y2, x, y;
+    if (!(ParseCoordPair(x2, y2) &&
+          SkipCommaWsp() &&
+          ParseCoordPair(x, y))) {
+      return false;
+    }
+
+    if (NS_FAILED(mPathSegList->AppendSeg(
+                    aAbsCoords ? PATHSEG_CURVETO_CUBIC_SMOOTH_ABS : PATHSEG_CURVETO_CUBIC_SMOOTH_REL,
+                    x2, y2, x, y))) {
+      return false;
+    }
+
+    if (!SkipWsp() || IsAlpha(*mIter)) {
+      // End of data, or start of a new command
+      return true;
+    }
+    SkipCommaWsp();
+  }
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseQuadBezierCurveto(bool aAbsCoords)
+{
+  while (true) {
+    float x1, y1, x, y;
+    if (!(ParseCoordPair(x1, y1) &&
+         SkipCommaWsp() &&
+         ParseCoordPair(x, y))) {
+      return false;
+    }
+
+    if (NS_FAILED(mPathSegList->AppendSeg(
+                    aAbsCoords ? PATHSEG_CURVETO_QUADRATIC_ABS : PATHSEG_CURVETO_QUADRATIC_REL,
+                    x1, y1, x, y))) {
+      return false;
+    }
+
+    if (!SkipWsp() || IsAlpha(*mIter)) {
+      // Start of a new command
+      return true;
+    }
+    SkipCommaWsp();
+  }
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseSmoothQuadBezierCurveto(bool aAbsCoords)
+{
+  while (true) {
+    float x, y;
+    if (!ParseCoordPair(x, y)) {
+      return false;
+    }
+
+    if (NS_FAILED(mPathSegList->AppendSeg(
+                    aAbsCoords ? PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS : PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL,
+                    x, y))) {
+      return false;
+    }
+
+    if (!SkipWsp() || IsAlpha(*mIter)) {
+      // End of data, or start of a new command
+      return true;
+    }
+    SkipCommaWsp();
+  }
+}
+
+//----------------------------------------------------------------------
+
+bool
+nsSVGPathDataParser::ParseEllipticalArc(bool aAbsCoords)
+{
+  while (true) {
+    float r1, r2, angle, x, y;
+    bool largeArcFlag, sweepFlag;
+
+    if (!(SVGContentUtils::ParseNumber(mIter, mEnd, r1) &&
+          SkipCommaWsp() &&
+          SVGContentUtils::ParseNumber(mIter, mEnd, r2) &&
+          SkipCommaWsp() &&
+          SVGContentUtils::ParseNumber(mIter, mEnd, angle)&&
+          SkipCommaWsp() &&
+          ParseFlag(largeArcFlag) &&
+          SkipCommaWsp() &&
+          ParseFlag(sweepFlag) &&
+          SkipCommaWsp() &&
+          ParseCoordPair(x, y))) {
+      return false;
+    }
+
+    // We can only pass floats after 'type', and per the SVG spec for arc,
+    // non-zero args are treated at 'true'.
+    if (NS_FAILED(mPathSegList->AppendSeg(
+                    aAbsCoords ? PATHSEG_ARC_ABS : PATHSEG_ARC_REL,
+                    r1, r2, angle,
+                    largeArcFlag ? 1.0f : 0.0f,
+                    sweepFlag ? 1.0f : 0.0f,
+                    x, y))) {
+      return false;
+    }
+
+    if (!SkipWsp() || IsAlpha(*mIter)) {
+      // End of data, or start of a new command
+      return true;
+    }
+    SkipCommaWsp();
+  }
+}
+
+//-----------------------------------------------------------------------
+
+
+
+
+static double
+CalcVectorAngle(double ux, double uy, double vx, double vy)
+{
+  double ta = atan2(uy, ux);
+  double tb = atan2(vy, vx);
+  if (tb >= ta)
+    return tb-ta;
+  return 2 * M_PI - (ta-tb);
+}
+
+
+nsSVGArcConverter::nsSVGArcConverter(const Point& from,
+                                     const Point& to,
+                                     const Point& radii,
+                                     double angle,
+                                     bool largeArcFlag,
+                                     bool sweepFlag)
+{
+  const double radPerDeg = M_PI/180.0;
+  mSegIndex = 0;
+
+  if (from == to) {
+    mNumSegs = 0;
+    return;
+  }
+
+  // Convert to center parameterization as shown in
+  // http://www.w3.org/TR/SVG/implnote.html
+  mRx = fabs(radii.x);
+  mRy = fabs(radii.y);
+
+  mSinPhi = sin(angle*radPerDeg);
+  mCosPhi = cos(angle*radPerDeg);
+
+  double x1dash =  mCosPhi * (from.x-to.x)/2.0 + mSinPhi * (from.y-to.y)/2.0;
+  double y1dash = -mSinPhi * (from.x-to.x)/2.0 + mCosPhi * (from.y-to.y)/2.0;
+
+  double root;
+  double numerator = mRx*mRx*mRy*mRy - mRx*mRx*y1dash*y1dash -
+                     mRy*mRy*x1dash*x1dash;
+
+  if (numerator < 0.0) {
+    //  If mRx , mRy and are such that there is no solution (basically,
+    //  the ellipse is not big enough to reach from 'from' to 'to'
+    //  then the ellipse is scaled up uniformly until there is
+    //  exactly one solution (until the ellipse is just big enough).
+
+    // -> find factor s, such that numerator' with mRx'=s*mRx and
+    //    mRy'=s*mRy becomes 0 :
+    double s = sqrt(1.0 - numerator/(mRx*mRx*mRy*mRy));
+
+    mRx *= s;
+    mRy *= s;
+    root = 0.0;
+
+  }
+  else {
+    root = (largeArcFlag == sweepFlag ? -1.0 : 1.0) *
+      sqrt( numerator/(mRx*mRx*y1dash*y1dash + mRy*mRy*x1dash*x1dash) );
+  }
+
+  double cxdash = root*mRx*y1dash/mRy;
+  double cydash = -root*mRy*x1dash/mRx;
+
+  mC.x = mCosPhi * cxdash - mSinPhi * cydash + (from.x+to.x)/2.0;
+  mC.y = mSinPhi * cxdash + mCosPhi * cydash + (from.y+to.y)/2.0;
+  mTheta = CalcVectorAngle(1.0, 0.0, (x1dash-cxdash)/mRx, (y1dash-cydash)/mRy);
+  double dtheta = CalcVectorAngle((x1dash-cxdash)/mRx, (y1dash-cydash)/mRy,
+                                  (-x1dash-cxdash)/mRx, (-y1dash-cydash)/mRy);
+  if (!sweepFlag && dtheta>0)
+    dtheta -= 2.0*M_PI;
+  else if (sweepFlag && dtheta<0)
+    dtheta += 2.0*M_PI;
+
+  // Convert into cubic bezier segments <= 90deg
+  mNumSegs = static_cast<int>(ceil(fabs(dtheta/(M_PI/2.0))));
+  mDelta = dtheta/mNumSegs;
+  mT = 8.0/3.0 * sin(mDelta/4.0) * sin(mDelta/4.0) / sin(mDelta/2.0);
+
+  mFrom = from;
+}
+
+bool
+nsSVGArcConverter::GetNextSegment(Point* cp1, Point* cp2, Point* to)
+{
+  if (mSegIndex == mNumSegs) {
+    return false;
+  }
+  
+  double cosTheta1 = cos(mTheta);
+  double sinTheta1 = sin(mTheta);
+  double theta2 = mTheta + mDelta;
+  double cosTheta2 = cos(theta2);
+  double sinTheta2 = sin(theta2);
+
+  // a) calculate endpoint of the segment:
+  to->x = mCosPhi * mRx*cosTheta2 - mSinPhi * mRy*sinTheta2 + mC.x;
+  to->y = mSinPhi * mRx*cosTheta2 + mCosPhi * mRy*sinTheta2 + mC.y;
+
+  // b) calculate gradients at start/end points of segment:
+  cp1->x = mFrom.x + mT * ( - mCosPhi * mRx*sinTheta1 - mSinPhi * mRy*cosTheta1);
+  cp1->y = mFrom.y + mT * ( - mSinPhi * mRx*sinTheta1 + mCosPhi * mRy*cosTheta1);
+
+  cp2->x = to->x + mT * ( mCosPhi * mRx*sinTheta2 + mSinPhi * mRy*cosTheta2);
+  cp2->y = to->y + mT * ( mSinPhi * mRx*sinTheta2 - mCosPhi * mRy*cosTheta2);
+
+  // do next segment
+  mTheta = theta2;
+  mFrom = *to;
+  ++mSegIndex;
+
+  return true;
+}