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/*************************************************************************
** SpecialManager.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2022 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 SPECIALMANAGER_HPP
#define SPECIALMANAGER_HPP
#include <memory>
#include <ostream>
#include <string>
#include <unordered_map>
#include <vector>
#include "SpecialHandler.hpp"
class SpecialActions;
class SpecialManager {
private:
using HandlerPool = std::vector<std::unique_ptr<SpecialHandler>>;
using HandlerMap = std::unordered_map<std::string,SpecialHandler*>;
public:
SpecialManager (const SpecialManager &) =delete;
static SpecialManager& instance ();
void registerHandler (std::unique_ptr<SpecialHandler> handler);
void registerHandlers (std::vector<std::unique_ptr<SpecialHandler>> &handlers, const char *ignorelist);
void unregisterHandlers ();
void preprocess (const std::string &special, SpecialActions &actions) const;
bool process (const std::string &special, double dvi2bp, SpecialActions &actions) const;
void notifyPreprocessingFinished () const;
void notifyBeginPage (unsigned pageno, SpecialActions &actions) const;
void notifyEndPage (unsigned pageno, SpecialActions &actions) const;
void notifyPositionChange (double x, double y, SpecialActions &actions) const;
void writeHandlerInfo (std::ostream &os) const;
SpecialHandler* findHandlerByName (const std::string &name) const;
protected:
SpecialManager () =default;
SpecialHandler* findHandlerByPrefix (const std::string &prefix) const;
private:
HandlerPool _handlerPool; ///< stores pointers to all handlers
HandlerMap _handlersByPrefix; ///< pointers to handlers for corresponding prefixes
};
#endif
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