svgtools.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
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 */
 
#pragma once
 
#include <basegfx/color/bcolor.hxx>
#include <basegfx/range/b2drange.hxx>
#include <basegfx/vector/b2ivector.hxx>
#include <rtl/ustrbuf.hxx>
#include "svgpaint.hxx"
#include "SvgNumber.hxx"
 
#include <string_view>
#include <vector>
 
 
namespace svgio::svgreader
    {
        // common non-token strings
        struct commonStrings
        {
            static constexpr OUStringLiteral aStrUserSpaceOnUse = u"userSpaceOnUse";
            static constexpr OUStringLiteral aStrObjectBoundingBox = u"objectBoundingBox";
            static constexpr OUStringLiteral aStrNonzero = u"nonzero";
            static constexpr OUStringLiteral aStrEvenOdd = u"evenodd";
        };
 
        enum class SvgUnits
        {
            userSpaceOnUse,
            objectBoundingBox
        };
 
        enum class SvgAlign
        {
            none,
            xMinYMin,
            xMidYMin,
            xMaxYMin,
            xMinYMid,
            xMidYMid, // default
            xMaxYMid,
            xMinYMax,
            xMidYMax,
            xMaxYMax
        };
 
        class SvgAspectRatio
        {
        private:
            SvgAlign    maSvgAlign;
 
            bool        mbMeetOrSlice : 1; // true = meet (default), false = slice
            bool        mbSet : 1;
 
        public:
            SvgAspectRatio()
            :   maSvgAlign(SvgAlign::xMidYMid),
                mbMeetOrSlice(true),
                mbSet(false)
            {
            }
 
            SvgAspectRatio(SvgAlign aSvgAlign, bool bMeetOrSlice)
            :   maSvgAlign(aSvgAlign),
                mbMeetOrSlice(bMeetOrSlice),
                mbSet(true)
            {
            }
 
            SvgAlign getSvgAlign() const { return maSvgAlign; }
            bool isMeetOrSlice() const { return mbMeetOrSlice; }
            bool isSet() const { return mbSet; }
 
            static basegfx::B2DHomMatrix createLinearMapping(const basegfx::B2DRange& rTarget, const basegfx::B2DRange& rSource);
            basegfx::B2DHomMatrix createMapping(const basegfx::B2DRange& rTarget, const basegfx::B2DRange& rSource) const;
        };
 
        void skip_char(std::u16string_view rCandidate, sal_Unicode aChar, sal_Int32& nPos, const sal_Int32 nLen);
        void skip_char(std::u16string_view rCandidate, sal_Unicode aCharA, sal_Unicode nCharB, sal_Int32& nPos, const sal_Int32 nLen);
        void copySign(std::u16string_view rCandidate, sal_Int32& nPos, OUStringBuffer& rTarget, const sal_Int32 nLen);
        void copyNumber(std::u16string_view rCandidate, sal_Int32& nPos, OUStringBuffer& rTarget, const sal_Int32 nLen);
        void copyHex(std::u16string_view rCandidate, sal_Int32& nPos, OUStringBuffer& rTarget, const sal_Int32 nLen);
        void copyString(std::u16string_view rCandidate, sal_Int32& nPos, OUStringBuffer& rTarget, const sal_Int32 nLen);
        void copyToLimiter(std::u16string_view rCandidate, sal_Unicode aLimiter, sal_Int32& nPos, OUStringBuffer& rTarget, const sal_Int32 nLen);
        bool readNumber(std::u16string_view rCandidate, sal_Int32& nPos, double& fNum, const sal_Int32 nLen);
        SvgUnit readUnit(std::u16string_view rCandidate, sal_Int32& nPos, const sal_Int32 nLen);
        bool readNumberAndUnit(std::u16string_view rCandidate, sal_Int32& nPos, SvgNumber& aNum, const sal_Int32 nLen);
        bool readAngle(std::u16string_view rCandidate, sal_Int32& nPos, double& fAngle, const sal_Int32 nLen);
        sal_Int32 read_hex(sal_Unicode aChar);
        bool match_colorKeyword(basegfx::BColor& rColor, const OUString& rName);
        bool read_color(const OUString& rCandidate, basegfx::BColor& rColor, SvgNumber& rOpacity);
        basegfx::B2DRange readViewBox(std::u16string_view rCandidate, InfoProvider const & rInfoProvider);
        std::vector<double> readFilterMatrix(std::u16string_view rCandidate, InfoProvider const & rInfoProvider);
        basegfx::B2DHomMatrix readTransform(std::u16string_view rCandidate, InfoProvider const & rInfoProvider);
        bool readSingleNumber(std::u16string_view rCandidate, SvgNumber& aNum);
        bool readLocalLink(std::u16string_view rCandidate, OUString& rURL);
        bool readLocalUrl(const OUString& rCandidate, OUString& rURL);
        bool readSvgPaint(const OUString& rCandidate, SvgPaint& rSvgPaint, OUString& rURL, SvgNumber& rOpacity);
 
        bool readSvgNumberVector(std::u16string_view rCandidate, SvgNumberVector& rSvgNumberVector);
        ::std::vector< double > solveSvgNumberVector(const SvgNumberVector& rInput, const InfoProvider& rInfoProvider);
 
        SvgAspectRatio readSvgAspectRatio(std::u16string_view rCandidate);
 
        typedef ::std::vector< OUString > SvgStringVector;
        bool readSvgStringVector(std::u16string_view rCandidate, SvgStringVector& rSvgStringVector);
 
        void readImageLink(const OUString& rCandidate, OUString& rXLink, OUString& rUrl, OUString& rData);
 
        OUString consolidateContiguousSpace(const OUString& rCandidate);
 
        // #125325# removes block comment of the general form '/* ... */', returns
        // an adapted string or the original if no comments included
        OUString removeBlockComments(const OUString& rCandidate);
 
} // end of namespace svgio::svgreader
 
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