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/*************************************************************************
** VFReader.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2020 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 VFREADER_HPP
#define VFREADER_HPP
#include "MessageException.hpp"
#include "StreamReader.hpp"
struct VFException : public MessageException {
explicit VFException (const std::string &msg) : MessageException(msg) {}
};
struct VFActions;
class VFReader : public StreamReader {
using ApproveAction = bool (*)(int);
public:
explicit VFReader (std::istream &is) : StreamReader(is) {}
VFActions* replaceActions (VFActions *a);
bool executeAll ();
bool executePreambleAndFontDefs ();
bool executeCharDefs ();
protected:
int executeCommand (ApproveAction approve=nullptr);
// the following methods represent the VF commands
// they are called by executeCommand and should not be used directly
void cmdPre ();
void cmdPost ();
void cmdShortChar (int pl);
void cmdLongChar ();
void cmdFontDef (int len);
private:
VFActions *_actions=nullptr; ///< actions to execute when reading a VF command
double _designSize=0; ///< design size of currently read VF in PS points
};
#endif
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