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/*************************************************************************
** SpecialHandler.h **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2016 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 DVISVGM_SPECIALHANDLER_H
#define DVISVGM_SPECIALHANDLER_H
#include <istream>
#include <list>
#include "MessageException.h"
class SpecialActions;
class SpecialManager;
struct SpecialException : public MessageException
{
SpecialException (const std::string &msg) : MessageException(msg) {}
};
struct DVIPreprocessingListener
{
virtual ~DVIPreprocessingListener () {}
virtual void dviPreprocessingFinished () =0;
};
struct DVIBeginPageListener
{
virtual ~DVIBeginPageListener () {}
virtual void dviBeginPage (unsigned pageno, SpecialActions &actions) =0;
};
struct DVIEndPageListener
{
virtual ~DVIEndPageListener () {}
virtual void dviEndPage (unsigned pageno, SpecialActions &actions) =0;
};
struct DVIPositionListener
{
virtual ~DVIPositionListener () {}
virtual void dviMovedTo (double x, double y, SpecialActions &actions) =0;
};
class SpecialHandler
{
friend class SpecialManager;
public:
virtual ~SpecialHandler () {}
virtual const char** prefixes () const=0;
virtual const char* info () const=0;
virtual const char* name () const=0;
virtual void setDviScaleFactor (double dvi2bp) {}
virtual void preprocess (const char *prefix, std::istream &is, SpecialActions &actions) {}
virtual bool process (const char *prefix, std::istream &is, SpecialActions &actions)=0;
};
#endif
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