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Diffstat (limited to 'blahtexml/source/BlahtexCore/Parser.h')
| -rw-r--r-- | blahtexml/source/BlahtexCore/Parser.h | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/blahtexml/source/BlahtexCore/Parser.h b/blahtexml/source/BlahtexCore/Parser.h deleted file mode 100644 index 2e69b4f..0000000 --- a/blahtexml/source/BlahtexCore/Parser.h +++ /dev/null @@ -1,142 +0,0 @@ -// File "Parser.h" -// -// blahtex (version 0.4.4) -// a TeX to MathML converter designed with MediaWiki in mind -// Copyright (C) 2006, David Harvey -// -// 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 2 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, write to the Free Software -// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - -#ifndef BLAHTEX_PARSER_H -#define BLAHTEX_PARSER_H - -#include "MacroProcessor.h" -#include "ParseTree.h" - -namespace blahtex -{ - -// The Parser class actually does the parsing work. It runs the supplied -// input tokens through a MacroProcessor, and builds a parse tree from the -// resulting expanded token stream. -class Parser -{ - -public: - // Main function that the caller should use to do a parsing job. - // Input is a TeX string, output is the root of a parse tree. - std::auto_ptr<ParseTree::MathNode> DoParse( - const std::vector<std::wstring>& input - ); - - // The parser uses GetMathTokenCode (in math mode) or GetTextTokenCode - // (in text mode) to translate each incoming token into one of the - // following values: - enum TokenCode - { - cEndOfInput, - cWhitespace, - cNewcommand, // The "\newcommand" command. - cIllegal, // Single character commands that are illegal in - // the current mode (like "$", "%"). - cBeginGroup, // Opening and closing braces ("{" and "}"). - cEndGroup, - cNextCell, // The commands "&" and "\\". - cNextRow, - cSuperscript, // The commands "^" and "_". - cSubscript, - cPrime, // The prime symbol "'". - cCommand1Arg, // TeX commands accepting one argument. - cCommand2Args, // TeX commands accepting two arguments. - cCommandInfix, // Infix commands like "\over". - cLeft, // The "\left" and "\right" commands. - cRight, - cBig, // "\big" style commands. - cLimits, // "\limits", "\nolimits", or "\displaylimits". - cBeginEnvironment, // Like "\begin{matrix}", "\end{matrix}" - cEndEnvironment, - cShortEnvironment, // Like "\substack{...}". Inside the braces it - // behaves like an environment, but it doesn't - // use "\begin" or "\end". - cEnterTextMode, // Command that switch from math mode to text - // mode (e.g. "\text"). - cStateChange, // State changes, e.g. "\rm", "\scriptstyle", - // "\color". - cSymbol, // Pretty much every other command: e.g. - // "a", "1", "\alpha", "+", "\rightarrow", etc. - - // cSymbolUnsafe covers some commands that one might expect to get - // translated as cSymbol. - // - // The issue is that TeX/LaTeX/AMS-LaTeX expands certain commands as - // macros, and they subsequently become unsafe for use as a single - // symbol. For example, "x^\cong" is illegal in TeX, because "\cong" - // gets expanded as a macro, so we assign the code cSymbolUnsafe to - // "\cong". This is a bit of a nasty hack, but the only real - // alternative is to simulate a much larger portion of - // TeX/LaTeX/AMS-LaTeX, which at this stage is unpalatable :-) - cSymbolUnsafe - }; - -private: - // Tokens are first filtered through this MacroProcessor object, so that - // the parser doesn't have to be aware of macros at all. - std::auto_ptr<MacroProcessor> mTokenSource; - - // ParseMathList starts parsing a math list, until it reaches a command - // indicating the end of the list, like "}" or "\right" or "\end{...}". - std::auto_ptr<ParseTree::MathNode> ParseMathList(); - - // ParseMathField parses a TeX "math field", which is either a single - // symbol or an expression grouped with braces. - std::auto_ptr<ParseTree::MathNode> ParseMathField(); - - // Handle a table enclosed in something like "\begin{matrix} ... - // \end{matrix}"; i.e. it breaks input up into entries and rows based on - // "\\" and "&" commands. - std::auto_ptr<ParseTree::MathTable> ParseMathTable(); - - // PrepareScripts is called when we encounter "^" or "_". It ensures - // that the last element of output->mChildren is a MathScripts node - // whose base is the base of the "^" or "_" command. - // - // (The caller does not get ownership of the MathScripts node; - // PrepareScripts assigns this ownership to *output if necessary). - ParseTree::MathScripts* PrepareScripts(ParseTree::MathList* output); - - // ParseTextList starts parsing a text list, until it reaches "}" or - // end of input. - std::auto_ptr<ParseTree::TextNode> ParseTextList(); - - // ParseTextField parses an argument to a command in text mode, which - // is either a single symbol or an expression grouped with braces. - std::auto_ptr<ParseTree::TextNode> ParseTextField(); - - // These functions determine the appropriate token code for the supplied - // token. Things like "1", "a", "+" are handled appropriately, as are - // backslash-prefixed commands listed in gMathTokenTable or - // gTextTokenTable. - TokenCode GetMathTokenCode(const std::wstring& token) const; - TokenCode GetTextTokenCode(const std::wstring& token) const; - - // Parses stuff that occurs after "\color", e.g. " {red}", and checks - // that the colour is legal. Returns the colour name, e.g. "red". - std::wstring ParseColourName(); -}; - -} - -#endif - -// end of file @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |