1 files changed, 83 insertions, 0 deletions
diff --git a/dom/svg/nsSVGPathDataParser.h b/dom/svg/nsSVGPathDataParser.h
new file mode 100644
index 000000000..3a880218d
--- /dev/null
+++ b/dom/svg/nsSVGPathDataParser.h
@@ -0,0 +1,83 @@
+/* -*- 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/. */
+
+#ifndef __NS_SVGPATHDATAPARSER_H__
+#define __NS_SVGPATHDATAPARSER_H__
+
+#include "mozilla/Attributes.h"
+#include "mozilla/gfx/Point.h"
+#include "nsSVGDataParser.h"
+
+namespace mozilla {
+class SVGPathData;
+} // namespace mozilla
+
+////////////////////////////////////////////////////////////////////////
+// nsSVGPathDataParser: a simple recursive descent parser that builds
+// DOMSVGPathSegs from path data strings. The grammar for path data
+// can be found in SVG CR 20001102, chapter 8.
+
+class nsSVGPathDataParser : public nsSVGDataParser
+{
+public:
+  nsSVGPathDataParser(const nsAString& aValue,
+                      mozilla::SVGPathData* aList)
+    : nsSVGDataParser(aValue),
+      mPathSegList(aList)
+  {
+    MOZ_ASSERT(aList, "null path data");
+  }
+
+  bool Parse();
+
+private:
+
+  bool ParseCoordPair(float& aX, float& aY);
+  bool ParseFlag(bool& aFlag);
+
+  bool ParsePath();
+  bool IsStartOfSubPath() const;
+  bool ParseSubPath();
+  
+  bool ParseSubPathElements();
+  bool ParseSubPathElement(char16_t aCommandType,
+                           bool aAbsCoords);
+
+  bool ParseMoveto();
+  bool ParseClosePath();
+  bool ParseLineto(bool aAbsCoords);
+  bool ParseHorizontalLineto(bool aAbsCoords);
+  bool ParseVerticalLineto(bool aAbsCoords);
+  bool ParseCurveto(bool aAbsCoords);
+  bool ParseSmoothCurveto(bool aAbsCoords);
+  bool ParseQuadBezierCurveto(bool aAbsCoords);
+  bool ParseSmoothQuadBezierCurveto(bool aAbsCoords);  
+  bool ParseEllipticalArc(bool aAbsCoords);  
+
+  mozilla::SVGPathData * const mPathSegList;
+};
+
+class nsSVGArcConverter
+{
+  typedef mozilla::gfx::Point Point;
+
+public:
+  nsSVGArcConverter(const Point& from,
+                    const Point& to,
+                    const Point& radii,
+                    double angle,
+                    bool largeArcFlag,
+                    bool sweepFlag);
+  bool GetNextSegment(Point* cp1, Point* cp2, Point* to);
+protected:
+  int32_t mNumSegs, mSegIndex;
+  double mTheta, mDelta, mT;
+  double mSinPhi, mCosPhi;
+  double mRx, mRy;
+  Point mFrom, mC;
+};
+
+#endif // __NS_SVGPATHDATAPARSER_H__