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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 _ -> [Str inp] -- if unparseable, just include original
Right res -> res
teXMath :: GenParser Char st [Inline]
teXMath = manyTill mathPart eof >>= return . concat
mathPart :: GenParser Char st [Inline]
mathPart = whitespace <|> superscript <|> subscript <|> symbol <|>
argument <|> digits <|> letters <|> misc
whitespace :: GenParser Char st [Inline]
whitespace = many1 space >> return []
symbol :: GenParser Char st [Inline]
symbol = try $ do
char '\\'
res <- many1 letter
case lookup res teXsymbols of
Just m -> return [Str m]
Nothing -> return [Str $ "\\" ++ res]
argument :: GenParser Char st [Inline]
argument = try $ do
char '{'
res <- many mathPart
char '}'
return $ if null res
then [Str " "]
else [Str "{"] ++ concat res ++ [Str "}"]
digits :: GenParser Char st [Inline]
digits = do
res <- many1 digit
return [Str res]
letters :: GenParser Char st [Inline]
letters = do
res <- many1 letter
return [Emph [Str res]]
misc :: GenParser Char st [Inline]
misc = do
res <- noneOf "}"
return [Str [res]]
scriptArg :: GenParser Char st [Inline]
scriptArg = try $ do
(try (do{char '{'; r <- many mathPart; char '}'; return $ concat r}))
<|> symbol
<|> (do{c <- (letter <|> digit); return [Str [c]]})
superscript :: GenParser Char st [Inline]
superscript = try $ do
char '^'
arg <- scriptArg
return [Superscript arg]
subscript :: GenParser Char st [Inline]
subscript = try $ do
char '_'
arg <- scriptArg
return [Subscript arg]
withThinSpace :: String -> String
withThinSpace str = "\x2009" ++ str ++ "\x2009"
teXsymbols :: [(String, String)]
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")
,("{", "{")
,("}", "}")
,("[", "[")
,("]", "]")
,("|", "|")
,("||", "||")
]
|
