83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __NS_SVGPATHDATAPARSER_H__
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#define __NS_SVGPATHDATAPARSER_H__
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#include "mozilla/Attributes.h"
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#include "mozilla/gfx/Point.h"
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#include "nsSVGDataParser.h"
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namespace mozilla {
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class SVGPathData;
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} // namespace mozilla
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////////////////////////////////////////////////////////////////////////
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// nsSVGPathDataParser: a simple recursive descent parser that builds
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// DOMSVGPathSegs from path data strings. The grammar for path data
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// can be found in SVG CR 20001102, chapter 8.
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class nsSVGPathDataParser : public nsSVGDataParser
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{
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public:
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nsSVGPathDataParser(const nsAString& aValue,
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mozilla::SVGPathData* aList)
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: nsSVGDataParser(aValue),
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mPathSegList(aList)
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{
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MOZ_ASSERT(aList, "null path data");
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}
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bool Parse();
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private:
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bool ParseCoordPair(float& aX, float& aY);
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bool ParseFlag(bool& aFlag);
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bool ParsePath();
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bool IsStartOfSubPath() const;
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bool ParseSubPath();
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bool ParseSubPathElements();
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bool ParseSubPathElement(char16_t aCommandType,
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bool aAbsCoords);
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bool ParseMoveto();
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bool ParseClosePath();
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bool ParseLineto(bool aAbsCoords);
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bool ParseHorizontalLineto(bool aAbsCoords);
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bool ParseVerticalLineto(bool aAbsCoords);
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bool ParseCurveto(bool aAbsCoords);
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bool ParseSmoothCurveto(bool aAbsCoords);
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bool ParseQuadBezierCurveto(bool aAbsCoords);
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bool ParseSmoothQuadBezierCurveto(bool aAbsCoords);
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bool ParseEllipticalArc(bool aAbsCoords);
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mozilla::SVGPathData * const mPathSegList;
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};
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class nsSVGArcConverter
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{
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typedef mozilla::gfx::Point Point;
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public:
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nsSVGArcConverter(const Point& from,
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const Point& to,
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const Point& radii,
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double angle,
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bool largeArcFlag,
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bool sweepFlag);
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bool GetNextSegment(Point* cp1, Point* cp2, Point* to);
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protected:
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int32_t mNumSegs, mSegIndex;
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double mTheta, mDelta, mT;
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double mSinPhi, mCosPhi;
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double mRx, mRy;
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Point mFrom, mC;
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};
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#endif // __NS_SVGPATHDATAPARSER_H__
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