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/*************************************************************************
** EmSpecialHandler.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2019 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 EMSPECIALHANDLER_HPP
#define EMSPECIALHANDLER_HPP
#include <unordered_map>
#include <vector>
#include "Pair.hpp"
#include "SpecialHandler.hpp"
class InputReader;
class SpecialActions;
class EmSpecialHandler : public SpecialHandler {
struct Line {
Line (int pp1, int pp2, char cc1, char cc2, double w) : p1(pp1), p2(pp2), c1(cc1), c2(cc2), width(w) {}
int p1, p2; ///< point numbers of line ends
char c1, c2; ///< cut type of line ends (h, v or p)
double width; ///< line width
};
public:
const char* name () const override {return "em";}
const char* info () const override {return "line drawing statements of the emTeX special set";}
std::vector<const char*> prefixes() const override;
bool process (const std::string &prefix, std::istream &in, SpecialActions &actions) override;
protected:
void dviEndPage (unsigned pageno, SpecialActions &actions) override;
void linewidth (InputReader &ir, SpecialActions &actions);
void moveto (InputReader &ir, SpecialActions &actions);
void lineto (InputReader &ir, SpecialActions &actions);
void line (InputReader &ir, SpecialActions &actions);
void point (InputReader &ir, SpecialActions &actions);
private:
std::unordered_map<int, DPair> _points; ///< points defined by special em:point
std::vector<Line> _lines; ///< list of lines with undefined end points
double _linewidth=0.4*72/72.27; ///< global line width
DPair _pos; ///< current position of "graphic cursor"
};
#endif
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