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/*************************************************************************
** SVGOutput.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2024 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 SVGOUTPUT_HPP
#define SVGOUTPUT_HPP
#include <memory>
#include <ostream>
#include <string>
#include "FilePath.hpp"
struct SVGOutputBase {
class HashTriple {
public:
HashTriple () =default;
HashTriple (std::string dviHash, std::string optHash, std::string cmbHash)
: _dviHash(std::move(dviHash)), _optHash(std::move(optHash)), _cmbHash(std::move(cmbHash)) {}
std::string dviHash () const {return _dviHash;}
std::string optHash () const {return _optHash;}
std::string cmbHash () const {return _cmbHash;}
bool empty () const {return _dviHash.empty();}
private:
std::string _dviHash; ///< hash of plain DVI data
std::string _optHash; ///< hash of options affecting the SVG document
std::string _cmbHash; ///< combined hash of DVI data and options
};
virtual ~SVGOutputBase () =default;
virtual std::ostream& getPageStream (int page, int numPages, const HashTriple &hashes=HashTriple()) const =0;
virtual FilePath filepath (int page, int numPages, const HashTriple &hashes= HashTriple()) const =0;
virtual void finish () =0;
virtual bool ignoresHashes () const {return true;}
};
class SVGOutput : public SVGOutputBase {
public:
SVGOutput () =default;
explicit SVGOutput (const std::string &base) : SVGOutput(base, "", 0) {}
SVGOutput (const std::string &base, const std::string &pattern) : SVGOutput(base, pattern, 0) {}
SVGOutput (const std::string &base, std::string pattern, int zipLevel);
std::ostream& getPageStream (int page, int numPages, const HashTriple &hash=HashTriple()) const override;
FilePath filepath (int page, int numPages, const HashTriple &hash=HashTriple()) const override;
void finish () override {_osptr.reset();}
bool ignoresHashes () const override;
void setFileNumbers (int fileNumber, int fileCount) {_fileNumber = fileNumber; _fileCount = fileCount;}
protected:
std::string expandFormatString (std::string str, int page, int numPages, const HashTriple &hashes) const;
private:
FilePath _path;
std::string _pattern;
bool _stdout=true; ///< write to STDOUT?
int _zipLevel=0; ///< compression level
int _fileNumber=1; ///< current number of file in sequence of files
int _fileCount=1; ///< number of files in sequence
mutable int _page=-1; ///< number of current page being written
mutable std::unique_ptr<std::ostream> _osptr;
};
#endif
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