1 /*************************************************************************
2 ** SpecialHandler.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_SPECIALHANDLER_H
22 #define DVISVGM_SPECIALHANDLER_H
23 
24 #include <istream>
25 #include <list>
26 #include "MessageException.h"
27 
28 
29 struct SpecialActions;
30 class  SpecialManager;
31 
32 
33 struct SpecialException : public MessageException
34 {
SpecialExceptionSpecialException35 	SpecialException (const std::string &msg) : MessageException(msg) {}
36 };
37 
38 
39 struct DVIPreprocessingListener
40 {
~DVIPreprocessingListenerDVIPreprocessingListener41 	virtual ~DVIPreprocessingListener () {}
42 	virtual void dviPreprocessingFinished () =0;
43 };
44 
45 
46 struct DVIEndPageListener
47 {
~DVIEndPageListenerDVIEndPageListener48 	virtual ~DVIEndPageListener () {}
49 	virtual void dviEndPage (unsigned pageno) =0;
50 };
51 
52 
53 struct DVIPositionListener
54 {
~DVIPositionListenerDVIPositionListener55 	virtual ~DVIPositionListener () {}
56 	virtual void dviMovedTo (double x, double y) =0;
57 };
58 
59 
60 struct SpecialHandler
61 {
62 	friend class SpecialManager;
63 
~SpecialHandlerSpecialHandler64 	virtual ~SpecialHandler () {}
65 	virtual const char** prefixes () const=0;
66 	virtual const char* info () const=0;
67 	virtual const char* name () const=0;
setDviScaleFactorSpecialHandler68 	virtual void setDviScaleFactor (double dvi2bp) {}
preprocessSpecialHandler69 	virtual void preprocess (const char *prefix, std::istream &is, SpecialActions *actions) {}
70 	virtual bool process (const char *prefix, std::istream &is, SpecialActions *actions)=0;
71 };
72 
73 
74 #endif
75