/************************************************************************* ** DvisvgmSpecialHandler.hpp ** ** ** ** This file is part of dvisvgm -- a fast DVI to SVG converter ** ** Copyright (C) 2005-2021 Martin Gieseking ** ** ** ** 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 . ** *************************************************************************/ #ifndef DVISVGMSPECIALHANDLER_HPP #define DVISVGMSPECIALHANDLER_HPP #include #include #include #include #include "SpecialHandler.hpp" class InputReader; class SpecialActions; class SVGElement; class SVGTree; class XMLElement; class XMLNode; #ifdef _MSC_VER // MSVC: Prevent aggressive optimization of pointers to member functions. // Instatiating class DvisvgmSpecialHandler without the following pragma // leads to memory corruption. // https://docs.microsoft.com/en-us/cpp/preprocessor/pointers-to-members #pragma pointers_to_members(full_generality, single_inheritance) #endif class DvisvgmSpecialHandler : public SpecialHandler { class XMLParser { using AppendFunc = void (SVGTree::*)(std::unique_ptr); using PushFunc = void (SVGTree::*)(std::unique_ptr); using PopFunc = void (SVGTree::*)(); using NameStack = std::vector; public: XMLParser (AppendFunc append, PushFunc push, PopFunc pop) : _append(append), _pushContext(push), _popContext(pop) {} void parse (const std::string &xml, SpecialActions &actions, bool finish=false); void finish (SpecialActions &actions); protected: void openElement (const std::string &tag, SpecialActions &actions); void closeElement (const std::string &tag, SpecialActions &actions); private: AppendFunc _append; PushFunc _pushContext; PopFunc _popContext; std::string _xmlbuf; NameStack _nameStack; ///< names of nested elements still missing a closing tag bool _error=false; }; using StringVector = std::vector; using MacroMap = std::unordered_map; public: DvisvgmSpecialHandler (); const char* name () const override {return "dvisvgm";} const char* info () const override {return "special set for embedding raw SVG snippets";} std::vector prefixes() const override; void preprocess (const std::string &prefix, std::istream &is, SpecialActions &actions) override; bool process (const std::string &prefix, std::istream &is, SpecialActions &actions) override; protected: void preprocessRaw (InputReader &ir); void preprocessRawDef (InputReader &ir); void preprocessRawSet (InputReader &ir); void preprocessEndRawSet (InputReader &ir); void preprocessRawPut (InputReader &ir); void processRaw (InputReader &ir, SpecialActions &actions); void processRawDef (InputReader &ir, SpecialActions &actions); void processRawSet (InputReader &ir, SpecialActions &actions); void processEndRawSet (InputReader &ir, SpecialActions &actions); void processRawPut (InputReader &ir, SpecialActions &actions); void processBBox (InputReader &ir, SpecialActions &actions); void processImg (InputReader &ir, SpecialActions &actions); void dviPreprocessingFinished () override; void dviEndPage (unsigned pageno, SpecialActions &actions) override; private: MacroMap _macros; MacroMap::iterator _currentMacro; int _nestingLevel=0; ///< nesting depth of rawset specials XMLParser _defsParser; ///< parses XML added by 'rawdef' specials XMLParser _pageParser; ///< parses XML added by 'raw' specials }; #endif