1 /*************************************************************************
2 ** EmSpecialHandler.h                                                   **
3 **                                                                      **
4 ** This file is part of dvisvgm -- the DVI to SVG converter             **
5 ** Copyright (C) 2005-2015 Martin Gieseking <martin.gieseking@uos.de>   **
6 **                                                                      **
7 ** This program is free software; you can redistribute it and/or        **
8 ** modify it under the terms of the GNU General Public License as       **
9 ** published by the Free Software Foundation; either version 3 of       **
10 ** the License, or (at your option) any later version.                  **
11 **                                                                      **
12 ** This program is distributed in the hope that it will be useful, but  **
13 ** WITHOUT ANY WARRANTY; without even the implied warranty of           **
14 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the         **
15 ** GNU General Public License for more details.                         **
16 **                                                                      **
17 ** You should have received a copy of the GNU General Public License    **
18 ** along with this program; if not, see <http://www.gnu.org/licenses/>. **
19 *************************************************************************/
20 
21 #ifndef DVISVGM_EMSPECIALHANDLER_H
22 #define DVISVGM_EMSPECIALHANDLER_H
23 
24 #include <list>
25 #include <map>
26 #include "Pair.h"
27 #include "SpecialHandler.h"
28 
29 
30 class EmSpecialHandler : public SpecialHandler, public DVIEndPageListener
31 {
32 	struct Line {
LineLine33 		Line (int pp1, int pp2, char cc1, char cc2, double w) : p1(pp1), p2(pp2), c1(cc1), c2(cc2), width(w) {}
34 		int p1, p2;   ///< point numbers of line ends
35 		char c1, c2;  ///< cut type of line ends (h, v or p)
36 		double width; ///< line width
37 	};
38 
39 	public:
40 		EmSpecialHandler ();
name()41 		const char* name () const   {return "em";}
info()42 		const char* info () const   {return "line drawing statements of the emTeX special set";}
43 		const char** prefixes () const;
44 		bool process (const char *prefix, std::istream &in, SpecialActions *actions);
45 
46 	protected:
47 		void dviEndPage (unsigned pageno);
48 
49 	private:
50 		std::map<int, DPair> _points; ///< points defined by special em:point
51 		std::list<Line> _lines;       ///< list of lines with undefined end points
52 		double _linewidth;            ///< global line width
53 		DPair _pos;                   ///< current position of "graphic cursor"
54 		SpecialActions *_actions;
55 };
56 
57 #endif
58