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{-
Copyright (C) 2007 John MacFarlane <jgm@berkeley.edu>
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-}
{- |
Module : Text.Pandoc.Readers.TeXMath
Copyright : Copyright (C) 2007 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Conversion of TeX math to a list of 'Pandoc' inline elements.
-}
module Text.Pandoc.Readers.TeXMath (
readTeXMath
) where
import Text.ParserCombinators.Parsec
import Text.Pandoc.Definition
-- | Converts a string of raw TeX math to a list of 'Pandoc' inlines.
readTeXMath :: String -> [Inline]
readTeXMath inp = case parse teXMath ("formula: " ++ inp) inp of
Left err -> [Str inp] -- if unparseable, just include original
Right res -> res
teXMath = manyTill mathPart eof >>= return . concat
mathPart = whitespace <|> superscript <|> subscript <|> symbol <|>
argument <|> digits <|> letters <|> misc
whitespace = many1 space >> return []
symbol = try $ do
char '\\'
res <- many1 letter
case lookup res teXsymbols of
Just m -> return [Str m]
Nothing -> return [Str $ "\\" ++ res]
argument = try $ do
char '{'
res <- many mathPart
char '}'
return $ if null res
then [Str " "]
else [Str "{"] ++ concat res ++ [Str "}"]
digits = do
res <- many1 digit
return [Str res]
letters = do
res <- many1 letter
return [Emph [Str res]]
misc = do
res <- noneOf "}"
return [Str [res]]
scriptArg = try $ do
(try (do{char '{'; r <- many mathPart; char '}'; return $ concat r}))
<|> symbol
<|> (do{c <- (letter <|> digit); return [Str [c]]})
superscript = try $ do
char '^'
arg <- scriptArg
return [Superscript arg]
subscript = try $ do
char '_'
arg <- scriptArg
return [Subscript arg]
withThinSpace str = "\x2009" ++ str ++ "\x2009"
teXsymbols =
[("alpha","\x3B1")
,("beta", "\x3B2")
,("chi", "\x3C7")
,("delta", "\x3B4")
,("Delta", "\x394")
,("epsilon", "\x3B5")
,("varepsilon", "\x25B")
,("eta", "\x3B7")
,("gamma", "\x3B3")
,("Gamma", "\x393")
,("iota", "\x3B9")
,("kappa", "\x3BA")
,("lambda", "\x3BB")
,("Lambda", "\x39B")
,("mu", "\x3BC")
,("nu", "\x3BD")
,("omega", "\x3C9")
,("Omega", "\x3A9")
,("phi", "\x3C6")
,("varphi", "\x3D5")
,("Phi", "\x3A6")
,("pi", "\x3C0")
,("Pi", "\x3A0")
,("psi", "\x3C8")
,("Psi", "\x3A8")
,("rho", "\x3C1")
,("sigma", "\x3C3")
,("Sigma", "\x3A3")
,("tau", "\x3C4")
,("theta", "\x3B8")
,("vartheta", "\x3D1")
,("Theta", "\x398")
,("upsilon", "\x3C5")
,("xi", "\x3BE")
,("Xi", "\x39E")
,("zeta", "\x3B6")
,("ne", "\x2260")
,("lt", withThinSpace "<")
,("le", withThinSpace "\x2264")
,("leq", withThinSpace "\x2264")
,("ge", withThinSpace "\x2265")
,("geq", withThinSpace "\x2265")
,("prec", withThinSpace "\x227A")
,("succ", withThinSpace "\x227B")
,("preceq", withThinSpace "\x2AAF")
,("succeq", withThinSpace "\x2AB0")
,("in", withThinSpace "\x2208")
,("notin", withThinSpace "\x2209")
,("subset", withThinSpace "\x2282")
,("supset", withThinSpace "\x2283")
,("subseteq", withThinSpace "\x2286")
,("supseteq", withThinSpace "\x2287")
,("equiv", withThinSpace "\x2261")
,("cong", withThinSpace "\x2245")
,("approx", withThinSpace "\x2248")
,("propto", withThinSpace "\x221D")
,("cdot", withThinSpace "\x22C5")
,("star", withThinSpace "\x22C6")
,("backslash", "\\")
,("times", withThinSpace "\x00D7")
,("divide", withThinSpace "\x00F7")
,("circ", withThinSpace "\x2218")
,("oplus", withThinSpace "\x2295")
,("otimes", withThinSpace "\x2297")
,("odot", withThinSpace "\x2299")
,("sum", "\x2211")
,("prod", "\x220F")
,("wedge", withThinSpace "\x2227")
,("bigwedge", withThinSpace "\x22C0")
,("vee", withThinSpace "\x2228")
,("bigvee", withThinSpace "\x22C1")
,("cap", withThinSpace "\x2229")
,("bigcap", withThinSpace "\x22C2")
,("cup", withThinSpace "\x222A")
,("bigcup", withThinSpace "\x22C3")
,("neg", "\x00AC")
,("implies", withThinSpace "\x21D2")
,("iff", withThinSpace "\x21D4")
,("forall", "\x2200")
,("exists", "\x2203")
,("bot", "\x22A5")
,("top", "\x22A4")
,("vdash", "\x22A2")
,("models", withThinSpace "\x22A8")
,("uparrow", "\x2191")
,("downarrow", "\x2193")
,("rightarrow", withThinSpace "\x2192")
,("to", withThinSpace "\x2192")
,("rightarrowtail", "\x21A3")
,("twoheadrightarrow", withThinSpace "\x21A0")
,("twoheadrightarrowtail", withThinSpace "\x2916")
,("mapsto", withThinSpace "\x21A6")
,("leftarrow", withThinSpace "\x2190")
,("leftrightarrow", withThinSpace "\x2194")
,("Rightarrow", withThinSpace "\x21D2")
,("Leftarrow", withThinSpace "\x21D0")
,("Leftrightarrow", withThinSpace "\x21D4")
,("partial", "\x2202")
,("nabla", "\x2207")
,("pm", "\x00B1")
,("emptyset", "\x2205")
,("infty", "\x221E")
,("aleph", "\x2135")
,("ldots", "...")
,("therefore", "\x2234")
,("angle", "\x2220")
,("quad", "\x00A0\x00A0")
,("cdots", "\x22EF")
,("vdots", "\x22EE")
,("ddots", "\x22F1")
,("diamond", "\x22C4")
,("Box", "\x25A1")
,("lfloor", "\x230A")
,("rfloor", "\x230B")
,("lceiling", "\x2308")
,("rceiling", "\x2309")
,("langle", "\x2329")
,("rangle", "\x232A")
,("{", "{")
,("}", "}")
,("[", "[")
,("]", "]")
,("|", "|")
,("||", "||")
]
|
