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LaTeX.hs
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LaTeX.hs
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{-# LANGUAGE ScopedTypeVariables, OverloadedStrings #-}
{-
Copyright (C) 2006-2015 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.LaTeX
Copyright : Copyright (C) 2006-2015 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley.edu>
Stability : alpha
Portability : portable
Conversion of LaTeX to 'Pandoc' document.
-}
module Text.Pandoc.Readers.LaTeX ( readLaTeX,
rawLaTeXInline,
rawLaTeXBlock,
inlineCommand,
handleIncludes
) where
import Text.Pandoc.Definition
import Text.Pandoc.Walk
import Text.Pandoc.Shared
import Text.Pandoc.Options
import Text.Pandoc.Parsing hiding ((<|>), many, optional, space,
mathDisplay, mathInline)
import qualified Text.Pandoc.UTF8 as UTF8
import Data.Char ( chr, ord, isLetter, isAlphaNum )
import Control.Monad.Trans (lift)
import Control.Monad
import Text.Pandoc.Builder
import Control.Applicative ((<|>), many, optional)
import Data.Maybe (fromMaybe, maybeToList)
import System.Environment (getEnv)
import System.FilePath (replaceExtension, (</>), takeExtension, addExtension)
import Data.List (intercalate)
import qualified Data.Map as M
import qualified Control.Exception as E
import Text.Pandoc.Highlighting (fromListingsLanguage)
import Text.Pandoc.Error
-- | Parse LaTeX from string and return 'Pandoc' document.
readLaTeX :: ReaderOptions -- ^ Reader options
-> String -- ^ String to parse (assumes @'\n'@ line endings)
-> Either PandocError Pandoc
readLaTeX opts = readWith parseLaTeX def{ stateOptions = opts }
parseLaTeX :: LP Pandoc
parseLaTeX = do
bs <- blocks
eof
st <- getState
let meta = stateMeta st
let (Pandoc _ bs') = doc bs
return $ Pandoc meta bs'
type LP = Parser String ParserState
anyControlSeq :: LP String
anyControlSeq = do
char '\\'
next <- option '\n' anyChar
case next of
'\n' -> return ""
c | isLetter c -> (c:) <$> (many letter <* optional sp)
| otherwise -> return [c]
controlSeq :: String -> LP String
controlSeq name = try $ do
char '\\'
case name of
"" -> mzero
[c] | not (isLetter c) -> string [c]
cs -> string cs <* notFollowedBy letter <* optional sp
return name
dimenarg :: LP String
dimenarg = try $ do
ch <- option "" $ string "="
num <- many1 digit
dim <- oneOfStrings ["pt","pc","in","bp","cm","mm","dd","cc","sp"]
return $ ch ++ num ++ dim
sp :: LP ()
sp = skipMany1 $ satisfy (\c -> c == ' ' || c == '\t')
<|> try (newline <* lookAhead anyChar <* notFollowedBy blankline)
isLowerHex :: Char -> Bool
isLowerHex x = x >= '0' && x <= '9' || x >= 'a' && x <= 'f'
tildeEscape :: LP Char
tildeEscape = try $ do
string "^^"
c <- satisfy (\x -> x >= '\0' && x <= '\128')
d <- if isLowerHex c
then option "" $ count 1 (satisfy isLowerHex)
else return ""
if null d
then case ord c of
x | x >= 64 && x <= 127 -> return $ chr (x - 64)
| otherwise -> return $ chr (x + 64)
else return $ chr $ read ('0':'x':c:d)
comment :: LP ()
comment = do
char '%'
skipMany (satisfy (/='\n'))
optional newline
return ()
bgroup :: LP ()
bgroup = () <$ char '{'
<|> () <$ controlSeq "bgroup"
<|> () <$ controlSeq "begingroup"
egroup :: LP ()
egroup = () <$ char '}'
<|> () <$ controlSeq "egroup"
<|> () <$ controlSeq "endgroup"
grouped :: Monoid a => LP a -> LP a
grouped parser = try $ bgroup *> (mconcat <$> manyTill parser egroup)
braced :: LP String
braced = bgroup *> (concat <$> manyTill
( many1 (satisfy (\c -> c /= '\\' && c /= '}' && c /= '{'))
<|> try (string "\\}")
<|> try (string "\\{")
<|> try (string "\\\\")
<|> ((\x -> "{" ++ x ++ "}") <$> braced)
<|> count 1 anyChar
) egroup)
bracketed :: Monoid a => LP a -> LP a
bracketed parser = try $ char '[' *> (mconcat <$> manyTill parser (char ']'))
mathDisplay :: LP String -> LP Inlines
mathDisplay p = displayMath <$> (try p >>= applyMacros' . trim)
mathInline :: LP String -> LP Inlines
mathInline p = math <$> (try p >>= applyMacros')
mathChars :: LP String
mathChars = (concat <$>) $
many $
many1 (satisfy (\c -> c /= '$' && c /='\\'))
<|> (\c -> ['\\',c]) <$> try (char '\\' *> anyChar)
quoted' :: (Inlines -> Inlines) -> LP String -> LP () -> LP Inlines
quoted' f starter ender = do
startchs <- starter
try ((f . mconcat) <$> manyTill inline ender) <|> lit startchs
doubleQuote :: LP Inlines
doubleQuote = do
smart <- getOption readerSmart
if smart
then quoted' doubleQuoted (try $ string "``") (void $ try $ string "''")
<|> quoted' doubleQuoted (string "“") (void $ char '”')
-- the following is used by babel for localized quotes:
<|> quoted' doubleQuoted (try $ string "\"`") (void $ try $ string "\"'")
<|> quoted' doubleQuoted (string "\"") (void $ char '"')
else str <$> many1 (oneOf "`'“”\"")
singleQuote :: LP Inlines
singleQuote = do
smart <- getOption readerSmart
if smart
then quoted' singleQuoted (string "`") (try $ char '\'' >> notFollowedBy letter)
<|> quoted' singleQuoted (string "‘") (try $ char '’' >> notFollowedBy letter)
else str <$> many1 (oneOf "`\'‘’")
inline :: LP Inlines
inline = (mempty <$ comment)
<|> (space <$ sp)
<|> inlineText
<|> inlineCommand
<|> inlineEnvironment
<|> inlineGroup
<|> (char '-' *> option (str "-")
(char '-' *> option (str "–") (str "—" <$ char '-')))
<|> doubleQuote
<|> singleQuote
<|> (str "”" <$ try (string "''"))
<|> (str "”" <$ char '”')
<|> (str "’" <$ char '\'')
<|> (str "’" <$ char '’')
<|> (str "\160" <$ char '~')
<|> mathDisplay (string "$$" *> mathChars <* string "$$")
<|> mathInline (char '$' *> mathChars <* char '$')
<|> (guardEnabled Ext_literate_haskell *> char '|' *> doLHSverb)
<|> (str . (:[]) <$> tildeEscape)
<|> (str . (:[]) <$> oneOf "[]")
<|> (str . (:[]) <$> oneOf "#&") -- TODO print warning?
-- <|> (str <$> count 1 (satisfy (\c -> c /= '\\' && c /='\n' && c /='}' && c /='{'))) -- eat random leftover characters
inlines :: LP Inlines
inlines = mconcat <$> many (notFollowedBy (char '}') *> inline)
inlineGroup :: LP Inlines
inlineGroup = do
ils <- grouped inline
if isNull ils
then return mempty
else return $ spanWith nullAttr ils
-- we need the span so we can detitlecase bibtex entries;
-- we need to know when something is {C}apitalized
block :: LP Blocks
block = (mempty <$ comment)
<|> (mempty <$ ((spaceChar <|> newline) *> spaces))
<|> environment
<|> macro
<|> blockCommand
<|> paragraph
<|> grouped block
<|> (mempty <$ char '&') -- loose & in table environment
blocks :: LP Blocks
blocks = mconcat <$> many block
getRawCommand :: String -> LP String
getRawCommand name' = do
rawargs <- withRaw (many (try (optional sp *> opt)) *>
option "" (try (optional sp *> dimenarg)) *>
many braced)
return $ '\\' : name' ++ snd rawargs
lookupListDefault :: (Ord k) => v -> [k] -> M.Map k v -> v
lookupListDefault d = (fromMaybe d .) . lookupList
where
lookupList l m = msum $ map (`M.lookup` m) l
blockCommand :: LP Blocks
blockCommand = try $ do
name <- anyControlSeq
guard $ name /= "begin" && name /= "end"
star <- option "" (string "*" <* optional sp)
let name' = name ++ star
let raw = do
rawcommand <- getRawCommand name'
transformed <- applyMacros' rawcommand
guard $ transformed /= rawcommand
notFollowedBy $ parseFromString inlines transformed
parseFromString blocks transformed
lookupListDefault raw [name',name] blockCommands
inBrackets :: Inlines -> Inlines
inBrackets x = str "[" <> x <> str "]"
-- eat an optional argument and one or more arguments in braces
ignoreInlines :: String -> (String, LP Inlines)
ignoreInlines name = (name, doraw <|> (mempty <$ optargs))
where optargs = skipopts *> skipMany (try $ optional sp *> braced)
contseq = '\\':name
doraw = (rawInline "latex" . (contseq ++) . snd) <$>
(getOption readerParseRaw >>= guard >> withRaw optargs)
ignoreBlocks :: String -> (String, LP Blocks)
ignoreBlocks name = (name, doraw <|> (mempty <$ optargs))
where optargs = skipopts *> skipMany (try $ optional sp *> braced)
contseq = '\\':name
doraw = (rawBlock "latex" . (contseq ++) . snd) <$>
(getOption readerParseRaw >>= guard >> withRaw optargs)
blockCommands :: M.Map String (LP Blocks)
blockCommands = M.fromList $
[ ("par", mempty <$ skipopts)
, ("title", mempty <$ (skipopts *>
(grouped inline >>= addMeta "title")
<|> (grouped block >>= addMeta "title")))
, ("subtitle", mempty <$ (skipopts *> tok >>= addMeta "subtitle"))
, ("author", mempty <$ (skipopts *> authors))
-- -- in letter class, temp. store address & sig as title, author
, ("address", mempty <$ (skipopts *> tok >>= addMeta "address"))
, ("signature", mempty <$ (skipopts *> authors))
, ("date", mempty <$ (skipopts *> tok >>= addMeta "date"))
-- sectioning
, ("chapter", updateState (\s -> s{ stateHasChapters = True })
*> section nullAttr 0)
, ("chapter*", updateState (\s -> s{ stateHasChapters = True })
*> section ("",["unnumbered"],[]) 0)
, ("section", section nullAttr 1)
, ("section*", section ("",["unnumbered"],[]) 1)
, ("subsection", section nullAttr 2)
, ("subsection*", section ("",["unnumbered"],[]) 2)
, ("subsubsection", section nullAttr 3)
, ("subsubsection*", section ("",["unnumbered"],[]) 3)
, ("paragraph", section nullAttr 4)
, ("paragraph*", section ("",["unnumbered"],[]) 4)
, ("subparagraph", section nullAttr 5)
, ("subparagraph*", section ("",["unnumbered"],[]) 5)
-- beamer slides
, ("frametitle", section nullAttr 3)
, ("framesubtitle", section nullAttr 4)
-- letters
, ("opening", (para . trimInlines) <$> (skipopts *> tok))
, ("closing", skipopts *> closing)
--
, ("hrule", pure horizontalRule)
, ("rule", skipopts *> tok *> tok *> pure horizontalRule)
, ("item", skipopts *> looseItem)
, ("documentclass", skipopts *> braced *> preamble)
, ("centerline", (para . trimInlines) <$> (skipopts *> tok))
, ("caption", skipopts *> setCaption)
, ("PandocStartInclude", startInclude)
, ("PandocEndInclude", endInclude)
, ("bibliography", mempty <$ (skipopts *> braced >>=
addMeta "bibliography" . splitBibs))
, ("addbibresource", mempty <$ (skipopts *> braced >>=
addMeta "bibliography" . splitBibs))
] ++ map ignoreBlocks
-- these commands will be ignored unless --parse-raw is specified,
-- in which case they will appear as raw latex blocks
[ "newcommand", "renewcommand", "newenvironment", "renewenvironment"
-- newcommand, etc. should be parsed by macro, but we need this
-- here so these aren't parsed as inline commands to ignore
, "special", "pdfannot", "pdfstringdef"
, "bibliographystyle"
, "maketitle", "makeindex", "makeglossary"
, "addcontentsline", "addtocontents", "addtocounter"
-- \ignore{} is used conventionally in literate haskell for definitions
-- that are to be processed by the compiler but not printed.
, "ignore"
, "hyperdef"
, "markboth", "markright", "markleft"
, "hspace", "vspace"
, "newpage"
]
addMeta :: ToMetaValue a => String -> a -> LP ()
addMeta field val = updateState $ \st ->
st{ stateMeta = addMetaField field val $ stateMeta st }
splitBibs :: String -> [Inlines]
splitBibs = map (str . flip replaceExtension "bib" . trim) . splitBy (==',')
setCaption :: LP Blocks
setCaption = do
ils <- tok
mblabel <- option Nothing $
try $ spaces' >> controlSeq "label" >> (Just <$> tok)
let ils' = case mblabel of
Just lab -> ils <> spanWith
("",[],[("data-label", stringify lab)]) mempty
Nothing -> ils
updateState $ \st -> st{ stateCaption = Just ils' }
return mempty
resetCaption :: LP ()
resetCaption = updateState $ \st -> st{ stateCaption = Nothing }
authors :: LP ()
authors = try $ do
char '{'
let oneAuthor = mconcat <$>
many1 (notFollowedBy' (controlSeq "and") >>
(inline <|> mempty <$ blockCommand))
-- skip e.g. \vspace{10pt}
auths <- sepBy oneAuthor (controlSeq "and")
char '}'
addMeta "author" (map trimInlines auths)
section :: Attr -> Int -> LP Blocks
section (ident, classes, kvs) lvl = do
hasChapters <- stateHasChapters `fmap` getState
let lvl' = if hasChapters then lvl + 1 else lvl
skipopts
contents <- grouped inline
lab <- option ident $ try (spaces' >> controlSeq "label" >> spaces' >> braced)
attr' <- registerHeader (lab, classes, kvs) contents
return $ headerWith attr' lvl' contents
inlineCommand :: LP Inlines
inlineCommand = try $ do
name <- anyControlSeq
guard $ name /= "begin" && name /= "end"
guard $ not $ isBlockCommand name
parseRaw <- getOption readerParseRaw
star <- option "" (string "*")
let name' = name ++ star
let raw = do
rawcommand <- getRawCommand name'
transformed <- applyMacros' rawcommand
if transformed /= rawcommand
then parseFromString inlines transformed
else if parseRaw
then return $ rawInline "latex" rawcommand
else return mempty
lookupListDefault mzero [name',name] inlineCommands
<|> raw
unlessParseRaw :: LP ()
unlessParseRaw = getOption readerParseRaw >>= guard . not
isBlockCommand :: String -> Bool
isBlockCommand s = s `M.member` blockCommands
inlineEnvironments :: M.Map String (LP Inlines)
inlineEnvironments = M.fromList
[ ("displaymath", mathEnv id Nothing "displaymath")
, ("equation", mathEnv id Nothing "equation")
, ("equation*", mathEnv id Nothing "equation*")
, ("gather", mathEnv id (Just "gathered") "gather")
, ("gather*", mathEnv id (Just "gathered") "gather*")
, ("multline", mathEnv id (Just "gathered") "multline")
, ("multline*", mathEnv id (Just "gathered") "multline*")
, ("eqnarray", mathEnv id (Just "aligned") "eqnarray")
, ("eqnarray*", mathEnv id (Just "aligned") "eqnarray*")
, ("align", mathEnv id (Just "aligned") "align")
, ("align*", mathEnv id (Just "aligned") "align*")
, ("alignat", mathEnv id (Just "aligned") "alignat")
, ("alignat*", mathEnv id (Just "aligned") "alignat*")
]
inlineCommands :: M.Map String (LP Inlines)
inlineCommands = M.fromList $
[ ("emph", extractSpaces emph <$> tok)
, ("textit", extractSpaces emph <$> tok)
, ("textsl", extractSpaces emph <$> tok)
, ("textsc", extractSpaces smallcaps <$> tok)
, ("sout", extractSpaces strikeout <$> tok)
, ("textsuperscript", extractSpaces superscript <$> tok)
, ("textsubscript", extractSpaces subscript <$> tok)
, ("textbackslash", lit "\\")
, ("backslash", lit "\\")
, ("slash", lit "/")
, ("textbf", extractSpaces strong <$> tok)
, ("textnormal", extractSpaces (spanWith ("",["nodecor"],[])) <$> tok)
, ("ldots", lit "…")
, ("dots", lit "…")
, ("mdots", lit "…")
, ("sim", lit "~")
, ("label", unlessParseRaw >> (inBrackets <$> tok))
, ("ref", unlessParseRaw >> (inBrackets <$> tok))
, ("noindent", unlessParseRaw >> return mempty)
, ("textgreek", tok)
, ("sep", lit ",")
, ("cref", unlessParseRaw >> (inBrackets <$> tok)) -- from cleveref.sty
, ("(", mathInline $ manyTill anyChar (try $ string "\\)"))
, ("[", mathDisplay $ manyTill anyChar (try $ string "\\]"))
, ("ensuremath", mathInline braced)
, ("texorpdfstring", (\_ x -> x) <$> tok <*> tok)
, ("P", lit "¶")
, ("S", lit "§")
, ("$", lit "$")
, ("%", lit "%")
, ("&", lit "&")
, ("#", lit "#")
, ("_", lit "_")
, ("{", lit "{")
, ("}", lit "}")
-- old TeX commands
, ("em", extractSpaces emph <$> inlines)
, ("it", extractSpaces emph <$> inlines)
, ("sl", extractSpaces emph <$> inlines)
, ("bf", extractSpaces strong <$> inlines)
, ("rm", inlines)
, ("itshape", extractSpaces emph <$> inlines)
, ("slshape", extractSpaces emph <$> inlines)
, ("scshape", extractSpaces smallcaps <$> inlines)
, ("bfseries", extractSpaces strong <$> inlines)
, ("/", pure mempty) -- italic correction
, ("aa", lit "å")
, ("AA", lit "Å")
, ("ss", lit "ß")
, ("o", lit "ø")
, ("O", lit "Ø")
, ("L", lit "Ł")
, ("l", lit "ł")
, ("ae", lit "æ")
, ("AE", lit "Æ")
, ("oe", lit "œ")
, ("OE", lit "Œ")
, ("pounds", lit "£")
, ("euro", lit "€")
, ("copyright", lit "©")
, ("textasciicircum", lit "^")
, ("textasciitilde", lit "~")
, ("`", option (str "`") $ try $ tok >>= accent grave)
, ("'", option (str "'") $ try $ tok >>= accent acute)
, ("^", option (str "^") $ try $ tok >>= accent circ)
, ("~", option (str "~") $ try $ tok >>= accent tilde)
, ("\"", option (str "\"") $ try $ tok >>= accent umlaut)
, (".", option (str ".") $ try $ tok >>= accent dot)
, ("=", option (str "=") $ try $ tok >>= accent macron)
, ("c", option (str "c") $ try $ tok >>= accent cedilla)
, ("v", option (str "v") $ try $ tok >>= accent hacek)
, ("u", option (str "u") $ try $ tok >>= accent breve)
, ("i", lit "i")
, ("\\", linebreak <$ (optional (bracketed inline) *> spaces'))
, (",", pure mempty)
, ("@", pure mempty)
, (" ", lit "\160")
, ("ps", pure $ str "PS." <> space)
, ("TeX", lit "TeX")
, ("LaTeX", lit "LaTeX")
, ("bar", lit "|")
, ("textless", lit "<")
, ("textgreater", lit ">")
, ("thanks", (note . mconcat) <$> (char '{' *> manyTill block (char '}')))
, ("footnote", (note . mconcat) <$> (char '{' *> manyTill block (char '}')))
, ("verb", doverb)
, ("lstinline", skipopts *> doverb)
, ("Verb", doverb)
, ("texttt", (code . stringify . toList) <$> tok)
, ("url", (unescapeURL <$> braced) >>= \url ->
pure (link url "" (str url)))
, ("href", (unescapeURL <$> braced <* optional sp) >>= \url ->
tok >>= \lab ->
pure (link url "" lab))
, ("includegraphics", skipopts *> (unescapeURL <$> braced) >>= mkImage)
, ("enquote", enquote)
, ("cite", citation "cite" AuthorInText False)
, ("Cite", citation "cite" AuthorInText False)
, ("citep", citation "citep" NormalCitation False)
, ("citep*", citation "citep*" NormalCitation False)
, ("citeal", citation "citeal" NormalCitation False)
, ("citealp", citation "citealp" NormalCitation False)
, ("citealp*", citation "citealp*" NormalCitation False)
, ("autocite", citation "autocite" NormalCitation False)
, ("smartcite", citation "smartcite" NormalCitation False)
, ("footcite", inNote <$> citation "footcite" NormalCitation False)
, ("parencite", citation "parencite" NormalCitation False)
, ("supercite", citation "supercite" NormalCitation False)
, ("footcitetext", inNote <$> citation "footcitetext" NormalCitation False)
, ("citeyearpar", citation "citeyearpar" SuppressAuthor False)
, ("citeyear", citation "citeyear" SuppressAuthor False)
, ("autocite*", citation "autocite*" SuppressAuthor False)
, ("cite*", citation "cite*" SuppressAuthor False)
, ("parencite*", citation "parencite*" SuppressAuthor False)
, ("textcite", citation "textcite" AuthorInText False)
, ("citet", citation "citet" AuthorInText False)
, ("citet*", citation "citet*" AuthorInText False)
, ("citealt", citation "citealt" AuthorInText False)
, ("citealt*", citation "citealt*" AuthorInText False)
, ("textcites", citation "textcites" AuthorInText True)
, ("cites", citation "cites" NormalCitation True)
, ("autocites", citation "autocites" NormalCitation True)
, ("footcites", inNote <$> citation "footcites" NormalCitation True)
, ("parencites", citation "parencites" NormalCitation True)
, ("supercites", citation "supercites" NormalCitation True)
, ("footcitetexts", inNote <$> citation "footcitetexts" NormalCitation True)
, ("Autocite", citation "Autocite" NormalCitation False)
, ("Smartcite", citation "Smartcite" NormalCitation False)
, ("Footcite", citation "Footcite" NormalCitation False)
, ("Parencite", citation "Parencite" NormalCitation False)
, ("Supercite", citation "Supercite" NormalCitation False)
, ("Footcitetext", inNote <$> citation "Footcitetext" NormalCitation False)
, ("Citeyearpar", citation "Citeyearpar" SuppressAuthor False)
, ("Citeyear", citation "Citeyear" SuppressAuthor False)
, ("Autocite*", citation "Autocite*" SuppressAuthor False)
, ("Cite*", citation "Cite*" SuppressAuthor False)
, ("Parencite*", citation "Parencite*" SuppressAuthor False)
, ("Textcite", citation "Textcite" AuthorInText False)
, ("Textcites", citation "Textcites" AuthorInText True)
, ("Cites", citation "Cites" NormalCitation True)
, ("Autocites", citation "Autocites" NormalCitation True)
, ("Footcites", citation "Footcites" NormalCitation True)
, ("Parencites", citation "Parencites" NormalCitation True)
, ("Supercites", citation "Supercites" NormalCitation True)
, ("Footcitetexts", inNote <$> citation "Footcitetexts" NormalCitation True)
, ("citetext", complexNatbibCitation NormalCitation)
, ("citeauthor", (try (tok *> optional sp *> controlSeq "citetext") *>
complexNatbibCitation AuthorInText)
<|> citation "citeauthor" AuthorInText False)
, ("nocite", mempty <$ (citation "nocite" NormalCitation False >>=
addMeta "nocite"))
] ++ map ignoreInlines
-- these commands will be ignored unless --parse-raw is specified,
-- in which case they will appear as raw latex blocks:
[ "index" ]
mkImage :: String -> LP Inlines
mkImage src = do
let alt = str "image"
case takeExtension src of
"" -> do
defaultExt <- getOption readerDefaultImageExtension
return $ image (addExtension src defaultExt) "" alt
_ -> return $ image src "" alt
inNote :: Inlines -> Inlines
inNote ils =
note $ para $ ils <> str "."
unescapeURL :: String -> String
unescapeURL ('\\':x:xs) | isEscapable x = x:unescapeURL xs
where isEscapable c = c `elem` ("#$%&~_^\\{}" :: String)
unescapeURL (x:xs) = x:unescapeURL xs
unescapeURL [] = ""
enquote :: LP Inlines
enquote = do
skipopts
context <- stateQuoteContext <$> getState
if context == InDoubleQuote
then singleQuoted <$> withQuoteContext InSingleQuote tok
else doubleQuoted <$> withQuoteContext InDoubleQuote tok
doverb :: LP Inlines
doverb = do
marker <- anyChar
code <$> manyTill (satisfy (/='\n')) (char marker)
doLHSverb :: LP Inlines
doLHSverb = codeWith ("",["haskell"],[]) <$> manyTill (satisfy (/='\n')) (char '|')
lit :: String -> LP Inlines
lit = pure . str
accent :: (Char -> String) -> Inlines -> LP Inlines
accent f ils =
case toList ils of
(Str (x:xs) : ys) -> return $ fromList (Str (f x ++ xs) : ys)
[] -> mzero
_ -> return ils
grave :: Char -> String
grave 'A' = "À"
grave 'E' = "È"
grave 'I' = "Ì"
grave 'O' = "Ò"
grave 'U' = "Ù"
grave 'a' = "à"
grave 'e' = "è"
grave 'i' = "ì"
grave 'o' = "ò"
grave 'u' = "ù"
grave c = [c]
acute :: Char -> String
acute 'A' = "Á"
acute 'E' = "É"
acute 'I' = "Í"
acute 'O' = "Ó"
acute 'U' = "Ú"
acute 'Y' = "Ý"
acute 'a' = "á"
acute 'e' = "é"
acute 'i' = "í"
acute 'o' = "ó"
acute 'u' = "ú"
acute 'y' = "ý"
acute 'C' = "Ć"
acute 'c' = "ć"
acute 'L' = "Ĺ"
acute 'l' = "ĺ"
acute 'N' = "Ń"
acute 'n' = "ń"
acute 'R' = "Ŕ"
acute 'r' = "ŕ"
acute 'S' = "Ś"
acute 's' = "ś"
acute 'Z' = "Ź"
acute 'z' = "ź"
acute c = [c]
circ :: Char -> String
circ 'A' = "Â"
circ 'E' = "Ê"
circ 'I' = "Î"
circ 'O' = "Ô"
circ 'U' = "Û"
circ 'a' = "â"
circ 'e' = "ê"
circ 'i' = "î"
circ 'o' = "ô"
circ 'u' = "û"
circ 'C' = "Ĉ"
circ 'c' = "ĉ"
circ 'G' = "Ĝ"
circ 'g' = "ĝ"
circ 'H' = "Ĥ"
circ 'h' = "ĥ"
circ 'J' = "Ĵ"
circ 'j' = "ĵ"
circ 'S' = "Ŝ"
circ 's' = "ŝ"
circ 'W' = "Ŵ"
circ 'w' = "ŵ"
circ 'Y' = "Ŷ"
circ 'y' = "ŷ"
circ c = [c]
tilde :: Char -> String
tilde 'A' = "Ã"
tilde 'a' = "ã"
tilde 'O' = "Õ"
tilde 'o' = "õ"
tilde 'I' = "Ĩ"
tilde 'i' = "ĩ"
tilde 'U' = "Ũ"
tilde 'u' = "ũ"
tilde 'N' = "Ñ"
tilde 'n' = "ñ"
tilde c = [c]
umlaut :: Char -> String
umlaut 'A' = "Ä"
umlaut 'E' = "Ë"
umlaut 'I' = "Ï"
umlaut 'O' = "Ö"
umlaut 'U' = "Ü"
umlaut 'a' = "ä"
umlaut 'e' = "ë"
umlaut 'i' = "ï"
umlaut 'o' = "ö"
umlaut 'u' = "ü"
umlaut c = [c]
dot :: Char -> String
dot 'C' = "Ċ"
dot 'c' = "ċ"
dot 'E' = "Ė"
dot 'e' = "ė"
dot 'G' = "Ġ"
dot 'g' = "ġ"
dot 'I' = "İ"
dot 'Z' = "Ż"
dot 'z' = "ż"
dot c = [c]
macron :: Char -> String
macron 'A' = "Ā"
macron 'E' = "Ē"
macron 'I' = "Ī"
macron 'O' = "Ō"
macron 'U' = "Ū"
macron 'a' = "ā"
macron 'e' = "ē"
macron 'i' = "ī"
macron 'o' = "ō"
macron 'u' = "ū"
macron c = [c]
cedilla :: Char -> String
cedilla 'c' = "ç"
cedilla 'C' = "Ç"
cedilla 's' = "ş"
cedilla 'S' = "Ş"
cedilla 't' = "ţ"
cedilla 'T' = "Ţ"
cedilla 'e' = "ȩ"
cedilla 'E' = "Ȩ"
cedilla 'h' = "ḩ"
cedilla 'H' = "Ḩ"
cedilla 'o' = "o̧"
cedilla 'O' = "O̧"
cedilla c = [c]
hacek :: Char -> String
hacek 'A' = "Ǎ"
hacek 'a' = "ǎ"
hacek 'C' = "Č"
hacek 'c' = "č"
hacek 'D' = "Ď"
hacek 'd' = "ď"
hacek 'E' = "Ě"
hacek 'e' = "ě"
hacek 'G' = "Ǧ"
hacek 'g' = "ǧ"
hacek 'H' = "Ȟ"
hacek 'h' = "ȟ"
hacek 'I' = "Ǐ"
hacek 'i' = "ǐ"
hacek 'j' = "ǰ"
hacek 'K' = "Ǩ"
hacek 'k' = "ǩ"
hacek 'L' = "Ľ"
hacek 'l' = "ľ"
hacek 'N' = "Ň"
hacek 'n' = "ň"
hacek 'O' = "Ǒ"
hacek 'o' = "ǒ"
hacek 'R' = "Ř"
hacek 'r' = "ř"
hacek 'S' = "Š"
hacek 's' = "š"
hacek 'T' = "Ť"
hacek 't' = "ť"
hacek 'U' = "Ǔ"
hacek 'u' = "ǔ"
hacek 'Z' = "Ž"
hacek 'z' = "ž"
hacek c = [c]
breve :: Char -> String
breve 'A' = "Ă"
breve 'a' = "ă"
breve 'E' = "Ĕ"
breve 'e' = "ĕ"
breve 'G' = "Ğ"
breve 'g' = "ğ"
breve 'I' = "Ĭ"
breve 'i' = "ĭ"
breve 'O' = "Ŏ"
breve 'o' = "ŏ"
breve 'U' = "Ŭ"
breve 'u' = "ŭ"
breve c = [c]
tok :: LP Inlines
tok = try $ grouped inline <|> inlineCommand <|> str <$> count 1 inlineChar
opt :: LP Inlines
opt = bracketed inline
skipopts :: LP ()
skipopts = skipMany (opt *> optional sp)
inlineText :: LP Inlines
inlineText = str <$> many1 inlineChar
inlineChar :: LP Char
inlineChar = noneOf "\\$%&~#{}^'`\"‘’“”-[] \t\n"
environment :: LP Blocks
environment = do
controlSeq "begin"
name <- braced
M.findWithDefault mzero name environments
<|> rawEnv name
inlineEnvironment :: LP Inlines
inlineEnvironment = try $ do
controlSeq "begin"
name <- braced
M.findWithDefault mzero name inlineEnvironments
rawEnv :: String -> LP Blocks
rawEnv name = do
let addBegin x = "\\begin{" ++ name ++ "}" ++ x
parseRaw <- getOption readerParseRaw
if parseRaw
then (rawBlock "latex" . addBegin) <$>
(withRaw (env name blocks) >>= applyMacros' . snd)
else env name blocks
----
type IncludeParser = ParserT String [String] IO String
-- | Replace "include" commands with file contents.
handleIncludes :: String -> IO (Either PandocError String)
handleIncludes s = mapLeft (ParsecError s) <$> runParserT includeParser' [] "input" s
includeParser' :: IncludeParser
includeParser' =
concat <$> many (comment' <|> escaped' <|> blob' <|> include'
<|> startMarker' <|> endMarker'
<|> verbCmd' <|> verbatimEnv' <|> backslash')
comment' :: IncludeParser
comment' = do
char '%'
xs <- manyTill anyChar newline
return ('%':xs ++ "\n")
escaped' :: IncludeParser
escaped' = try $ string "\\%" <|> string "\\\\"
verbCmd' :: IncludeParser
verbCmd' = fmap snd <$>
withRaw $ try $ do
string "\\verb"
c <- anyChar
manyTill anyChar (char c)
verbatimEnv' :: IncludeParser
verbatimEnv' = fmap snd <$>
withRaw $ try $ do
string "\\begin"
name <- braced'
guard $ name `elem` ["verbatim", "Verbatim", "lstlisting",
"minted", "alltt", "comment"]
manyTill anyChar (try $ string $ "\\end{" ++ name ++ "}")
blob' :: IncludeParser
blob' = try $ many1 (noneOf "\\%")
backslash' :: IncludeParser
backslash' = string "\\"
braced' :: IncludeParser
braced' = try $ char '{' *> manyTill (satisfy (/='}')) (char '}')
maybeAddExtension :: String -> FilePath -> FilePath
maybeAddExtension ext fp =
if null (takeExtension fp)
then addExtension fp ext
else fp
include' :: IncludeParser
include' = do
fs' <- try $ do
char '\\'
name <- try (string "include")
<|> try (string "input")
<|> string "usepackage"
-- skip options
skipMany $ try $ char '[' *> manyTill anyChar (char ']')
fs <- (map trim . splitBy (==',')) <$> braced'
return $ if name == "usepackage"
then map (maybeAddExtension ".sty") fs
else map (maybeAddExtension ".tex") fs
pos <- getPosition
containers <- getState
let fn = case containers of
(f':_) -> f'
[] -> "input"
-- now process each include file in order...
rest <- getInput
results' <- forM fs' (\f -> do
when (f `elem` containers) $
fail "Include file loop!"
contents <- lift $ readTeXFile f
return $ "\\PandocStartInclude{" ++ f ++ "}" ++
contents ++ "\\PandocEndInclude{" ++
fn ++ "}{" ++ show (sourceLine pos) ++ "}{"
++ show (sourceColumn pos) ++ "}")
setInput $ concat results' ++ rest
return ""
startMarker' :: IncludeParser
startMarker' = try $ do
string "\\PandocStartInclude"
fn <- braced'
updateState (fn:)
setPosition $ newPos fn 1 1
return $ "\\PandocStartInclude{" ++ fn ++ "}"
endMarker' :: IncludeParser
endMarker' = try $ do
string "\\PandocEndInclude"
fn <- braced'
ln <- braced'
co <- braced'
updateState tail
setPosition $ newPos fn (fromMaybe 1 $ safeRead ln) (fromMaybe 1 $ safeRead co)
return $ "\\PandocEndInclude{" ++ fn ++ "}{" ++ ln ++ "}{" ++
co ++ "}"
readTeXFile :: FilePath -> IO String
readTeXFile f = do
texinputs <- E.catch (getEnv "TEXINPUTS") $ \(_ :: E.SomeException) ->
return "."
let ds = splitBy (==':') texinputs
readFileFromDirs ds f
readFileFromDirs :: [FilePath] -> FilePath -> IO String
readFileFromDirs [] _ = return ""
readFileFromDirs (d:ds) f =
E.catch (UTF8.readFile $ d </> f) $ \(_ :: E.SomeException) ->
readFileFromDirs ds f
----
keyval :: LP (String, String)
keyval = try $ do
key <- many1 alphaNum
val <- option "" $ char '=' >> many1 alphaNum
skipMany spaceChar
optional (char ',')
skipMany spaceChar
return (key, val)
keyvals :: LP [(String, String)]
keyvals = try $ char '[' *> manyTill keyval (char ']')
alltt :: String -> LP Blocks
alltt t = walk strToCode <$> parseFromString blocks
(substitute " " "\\ " $ substitute "%" "\\%" $
intercalate "\\\\\n" $ lines t)
where strToCode (Str s) = Code nullAttr s
strToCode x = x
rawLaTeXBlock :: LP String
rawLaTeXBlock = snd <$> try (withRaw (environment <|> blockCommand))