Rework the SVGPathSource interface

Source/core/svg/SVGPathStringSource.h

 /*
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 14 matching lines @@
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class SVGPathStringSource final : public SVGPathSource {
 public:
     explicit SVGPathStringSource(const String&);
 
 private:
     virtual bool hasMoreData() const override;
-    virtual bool moveToNextToken() override;
-    virtual bool parseSVGSegmentType(SVGPathSegType&) override;
-    virtual SVGPathSegType nextCommand(SVGPathSegType previousCommand) override;
+    virtual SVGPathSegType peekSegmentType() override;
+    virtual PathSegmentData parseSegment() override;
 
-    virtual bool parseMoveToSegment(FloatPoint&) override;
-    virtual bool parseLineToSegment(FloatPoint&) override;
-    virtual bool parseLineToHorizontalSegment(float&) override;
-    virtual bool parseLineToVerticalSegment(float&) override;
-    virtual bool parseCurveToCubicSegment(FloatPoint&, FloatPoint&, FloatPoint&) override;
-    virtual bool parseCurveToCubicSmoothSegment(FloatPoint&, FloatPoint&) override;
-    virtual bool parseCurveToQuadraticSegment(FloatPoint&, FloatPoint&) override;
-    virtual bool parseCurveToQuadraticSmoothSegment(FloatPoint&) override;
-    virtual bool parseArcToSegment(float&, float&, float&, bool&, bool&, FloatPoint&) override;
+    void eatWhitespace();
+    float parseNumberWithError();
+    bool parseArcFlagWithError();
 
     String m_string;
     bool m_is8BitSource;
+    bool m_seenError;
 
     union {
         const LChar* m_character8;
         const UChar* m_character16;
     } m_current;
     union {
         const LChar* m_character8;
         const UChar* m_character16;
     } m_end;
+
+    SVGPathSegType m_previousCommand;
 };
 
 } // namespace blink
 
 #endif // SVGPathStringSource_h