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+/*************************************************************************
+** PDFHandler.hpp **
+** **
+** This file is part of dvisvgm -- a fast DVI to SVG converter **
+** Copyright (C) 2005-2023 Martin Gieseking <martin.gieseking@uos.de> **
+** **
+** This program is free software; you can redistribute it and/or **
+** modify it under the terms of the GNU General Public License as **
+** published by the Free Software Foundation; either version 3 of **
+** the License, or (at your option) any later version. **
+** **
+** This program is distributed in the hope that it will be useful, but **
+** WITHOUT ANY WARRANTY; without even the implied warranty of **
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
+** GNU General Public License for more details. **
+** **
+** You should have received a copy of the GNU General Public License **
+** along with this program; if not, see <http://www.gnu.org/licenses/>. **
+*************************************************************************/
+
+#ifndef PDFHANDLER_HPP
+#define PDFHANDLER_HPP
+
+#include <map>
+#include <string>
+#include "BoundingBox.hpp"
+#include "Process.hpp"
+#include "SVGTree.hpp"
+
+class XMLElement;
+
+class PDFHandler {
+ public:
+ struct ObjID {
+ ObjID () : num(-1), gen(0) {}
+ ObjID (int number, int generation) : num(number), gen(generation) {}
+ ObjID (int number, int generation, std::string filename) : num(number), gen(generation), fname(std::move(filename)) {}
+ bool valid () const {return num >= 0;}
+ int num, gen; ///< object and generation number
+ std::string fname;
+ };
+
+ protected:
+ struct ClipPathData {
+ ClipPathData (std::string cpid, SVGElement *group) : id(std::move(cpid)), groupElement(group) {}
+ std::string id;
+ SVGElement *groupElement;
+ };
+
+ public:
+ PDFHandler () =default;
+ explicit PDFHandler (SVGTree &svg) : _svg(&svg) {}
+ PDFHandler (const PDFHandler &page) =delete;
+ PDFHandler (PDFHandler &&page) =delete;
+ ~PDFHandler ();
+ void assignSVGTree (SVGTree &svg) {_svg = &svg;}
+ const BoundingBox& bbox () const {return _bbox;}
+ std::unique_ptr<SVGElement> convert (const std::string &fname, int pageno, std::unique_ptr<SVGElement> context=nullptr);
+ static std::string mutoolVersion ();
+ static BoundingBox bbox (std::string &fname, int pageno);
+ static bool available () {return !mutoolVersion().empty();}
+
+ protected:
+ static std::string mutool (const std::string &cmd, bool readFromStderr=false);
+ static std::string mutool (const std::string &cmd, const SearchPattern &pattern, bool readFromStderr=false);
+ static std::string mtExtract (const std::string &fname, const SearchPattern &pattern);
+ static std::string mtShow (const std::string &fname, const std::string &path, char fmtmode= 'b');
+ static std::string mtShow (const std::string &fname, const std::string &path, const SearchPattern &pattern, char fmtmode= 'b');
+ std::string mtShow (const std::string &path, char fmtmode= 'b') const {return mtShow(_fname, path, fmtmode);}
+ std::string mtShow (const std::string &path, const SearchPattern &pattern, char fmtmode= 'b') const {
+ return mtShow(_fname, path, pattern, fmtmode);
+ }
+ void initFile (const std::string &fname);
+ void finishFile ();
+ void initPage (int pageno, std::unique_ptr<SVGElement> context);
+ std::unique_ptr<SVGElement> finishPage ();
+ void collectObjects ();
+ void elementOpened (XMLElement *trcElement);
+ void elementClosed (XMLElement *trcElement);
+ void doClipPath (XMLElement *trcClipPathElement);
+ void doClipStrokePath (XMLElement *trcClipStrokePathElement);
+ void doClipText (XMLElement *trcClipTextElement);
+ void doPopClip (XMLElement *trcPopClipElement);
+ void doFillPath (XMLElement *trcFillPathElement);
+ void doStrokePath (XMLElement *trcStrokePathElement);
+ void doFillImage (XMLElement *trcFillImageElement);
+ void doFillText (XMLElement *trcFillTextElement);
+ void doOpenTile (XMLElement *trcTileElement);
+ void doCloseTile (XMLElement *trcTileElement);
+
+ private:
+ std::string _fname;
+ int _pageno=0;
+ int _numPages=0;
+ std::map<int,std::string> _extractedFiles;
+ std::map<std::string,ObjID> _objDict; ///< object names => object IDs
+ std::vector<std::string> _imgSeq;
+ NativeFont *_currentFont=nullptr; ///< currently selected font
+ size_t _numClipPath=0; ///< number of clipping paths processed
+ size_t _numImages=0; ///< number of embedded images already processed
+ size_t _numPatterns=0; ///< number of patterns processed
+ std::stack<ClipPathData> _clipPathStack;
+ double _x=0, _y=0; ///< current character position
+ BoundingBox _bbox; ///< bounding box of current/last page processed
+ SVGTree *_svg=nullptr;
+ XMLElement *_context=nullptr; ///< node holding the generated page contents
+};
+
+#endif