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/*************************************************************************
** Subfont.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2022 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 SUBFONT_HPP
#define SUBFONT_HPP
#include <istream>
#include <map>
#include <memory>
#include <sstream>
#include <string>
#include <vector>
#include "MessageException.hpp"
class Subfont;
/** Represents a collection of subfont mappings as defined in a .sfd file, and
* encapsulates the evaluation of these files. */
class SubfontDefinition {
using Subfonts = std::map<std::string, std::unique_ptr<Subfont>>;
public:
SubfontDefinition (const SubfontDefinition &sfd) =delete;
static SubfontDefinition* lookup (const std::string &name);
// int getIDs (std::vector<std::string> &ids) const;
const std::string& name() const {return _sfname;}
std::string filename() const {return _sfname+".sfd";}
Subfont* subfont (const std::string &id) const;
std::vector<Subfont*> subfonts () const;
const char* path () const;
protected:
SubfontDefinition (std::string name, const char *fpath);
private:
std::string _sfname; ///< name of subfont
Subfonts _subfonts; ///< all subfonts defined in the corresponding .sfd file
};
/** Represents a single subfont mapping defined in a SubfontDefinition (.sfd file). */
class Subfont {
friend class SubfontDefinition;
public:
Subfont (const Subfont &sf) =delete;
const std::string& id () const {return _id;}
uint16_t decode (unsigned char c);
protected:
Subfont (SubfontDefinition &sfd, const std::string &id) : _sfd(sfd), _id(id), _mapping(0) {}
bool read ();
private:
SubfontDefinition &_sfd; ///< SubfontDefinition where this Subfont belongs to
const std::string &_id; ///< id of this subfont as specified in the .sfd file
std::vector<uint16_t> _mapping; ///< the character mapping table with 256 entries
};
class SubfontException : public MessageException {
public:
SubfontException (const std::string &msg, std::string fname, int lineno=0)
: MessageException(msg), _fname(std::move(fname)), _lineno(lineno) {}
const char* filename () const {return _fname.c_str();}
int lineno () const {return _lineno;}
private:
std::string _fname;
int _lineno;
};
#endif
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