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LaTeX.hs
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LaTeX.hs
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{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PatternGuards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE ViewPatterns #-}
{- |
Module : Text.Pandoc.Readers.LaTeX
Copyright : Copyright (C) 2006-2023 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,
applyMacros,
rawLaTeXInline,
rawLaTeXBlock,
inlineCommand
) where
import Control.Applicative (many, optional, (<|>))
import Control.Monad
import Control.Monad.Except (throwError)
import Data.Containers.ListUtils (nubOrd)
import Data.Char (isDigit, isLetter, isAlphaNum, toUpper, chr)
import Data.Default
import Data.List (intercalate)
import qualified Data.Map as M
import Data.Maybe (fromMaybe, maybeToList)
import qualified Data.Set as Set
import Data.Text (Text)
import qualified Data.Text as T
import Data.Either (partitionEithers)
import Skylighting (defaultSyntaxMap)
import System.FilePath (addExtension, replaceExtension, takeExtension)
import Text.Collate.Lang (renderLang)
import Text.Pandoc.Builder as B
import Text.Pandoc.Class (PandocPure, PandocMonad (..), getResourcePath,
readFileFromDirs, report,
setResourcePath, getZonedTime)
import Data.Time (ZonedTime(..), LocalTime(..), showGregorian)
import Text.Pandoc.Error (PandocError (PandocParseError))
import Text.Pandoc.Highlighting (languagesByExtension)
import Text.Pandoc.ImageSize (numUnit, showFl)
import Text.Pandoc.Logging
import Text.Pandoc.Options
import Text.Pandoc.Parsing hiding (blankline, many, mathDisplay, mathInline,
optional, space, spaces, withRaw, (<|>))
import Text.Pandoc.TeX (Tok (..), TokType (..))
import Text.Pandoc.Readers.LaTeX.Parsing
import Text.Pandoc.Readers.LaTeX.Citation (citationCommands, cites)
import Text.Pandoc.Readers.LaTeX.Math (dollarsMath, inlineEnvironments,
inlineEnvironment,
mathDisplay, mathInline,
newtheorem, theoremstyle, proof,
theoremEnvironment)
import Text.Pandoc.Readers.LaTeX.Table (tableEnvironments)
import Text.Pandoc.Readers.LaTeX.Macro (macroDef)
import Text.Pandoc.Readers.LaTeX.Lang (inlineLanguageCommands,
enquoteCommands,
babelLangToBCP47,
setDefaultLanguage)
import Text.Pandoc.Readers.LaTeX.SIunitx (siunitxCommands)
import Text.Pandoc.Readers.LaTeX.Inline (acronymCommands, refCommands,
nameCommands, charCommands,
accentCommands,
biblatexInlineCommands,
verbCommands, rawInlineOr,
listingsLanguage)
import Text.Pandoc.Shared
import Text.Pandoc.Walk
import Data.List.NonEmpty (nonEmpty)
-- for debugging:
-- import Text.Pandoc.Extensions (getDefaultExtensions)
-- import Text.Pandoc.Class.PandocIO (runIOorExplode, PandocIO)
-- import Debug.Trace (traceShowId)
-- | Parse LaTeX from string and return 'Pandoc' document.
readLaTeX :: (PandocMonad m, ToSources a)
=> ReaderOptions -- ^ Reader options
-> a -- ^ Input to parse
-> m Pandoc
readLaTeX opts ltx = do
let sources = toSources ltx
parsed <- runParserT parseLaTeX def{ sOptions = opts } "source"
(TokStream False (tokenizeSources sources))
case parsed of
Right result -> return result
Left e -> throwError $ fromParsecError sources e
parseLaTeX :: PandocMonad m => LP m Pandoc
parseLaTeX = do
bs <- blocks
eof
st <- getState
let meta = sMeta st
let doc' = doc bs
let headerLevel (Header n _ _) = [n]
headerLevel _ = []
let bottomLevel = maybe 1 minimum $ nonEmpty $ query headerLevel doc'
let adjustHeaders m (Header n attr ils) = Header (n+m) attr ils
adjustHeaders _ x = x
let (Pandoc _ bs') =
-- handle the case where you have \part or \chapter
(if bottomLevel < 1
then walk (adjustHeaders (1 - bottomLevel))
else id) $
walk (resolveRefs (sLabels st)) doc'
return $ Pandoc meta bs'
resolveRefs :: M.Map Text [Inline] -> Inline -> Inline
resolveRefs labels x@(Link (ident,classes,kvs) _ _) =
case (T.takeWhile (/='+') <$> lookup "reference-type" kvs,
lookup "reference" kvs) of
(Just "ref", Just lab) -> -- TODO special treatment of ref+label
case M.lookup lab labels of
Just txt -> Link (ident,classes,kvs) txt ("#" <> lab, "")
Nothing -> x
_ -> x
resolveRefs _ x = x
-- testParser :: LP PandocIO a -> Text -> IO a
-- testParser p t = do
-- res <- runIOorExplode (runParserT p defaultLaTeXState{
-- sOptions = def{ readerExtensions =
-- enableExtension Ext_raw_tex $
-- getDefaultExtensions "latex" }} "source"
-- (tokenize (initialPos "source") t))
-- case res of
-- Left e -> error (show e)
-- Right r -> return r
rawLaTeXBlock :: (PandocMonad m, HasMacros s, HasReaderOptions s)
=> ParsecT Sources s m Text
rawLaTeXBlock = do
lookAhead (try (char '\\' >> letter))
toks <- getInputTokens
snd <$> (
rawLaTeXParser toks
(macroDef (const mempty) <|>
do choice (map controlSeq
["include", "input", "subfile", "usepackage"])
skipMany opt
braced
return mempty) blocks
<|> rawLaTeXParser toks
(environment <|> blockCommand)
(mconcat <$> many (block <|> beginOrEndCommand)))
-- See #4667 for motivation; sometimes people write macros
-- that just evaluate to a begin or end command, which blockCommand
-- won't accept.
beginOrEndCommand :: PandocMonad m => LP m Blocks
beginOrEndCommand = try $ do
Tok _ (CtrlSeq name) txt <- anyControlSeq
guard $ name == "begin" || name == "end"
(envname, rawargs) <- withRaw braced
if M.member (untokenize envname)
(inlineEnvironments :: M.Map Text (LP PandocPure Inlines))
then mzero
else return $ rawBlock "latex"
(txt <> untokenize rawargs)
rawLaTeXInline :: (PandocMonad m, HasMacros s, HasReaderOptions s)
=> ParsecT Sources s m Text
rawLaTeXInline = do
lookAhead (try (char '\\' >> letter))
toks <- getInputTokens
raw <- snd <$>
( rawLaTeXParser toks
(mempty <$ (controlSeq "input" >> skipMany rawopt >> braced))
inlines
<|> rawLaTeXParser toks (inlineEnvironment <|> inlineCommand')
inlines
)
finalbraces <- mconcat <$> many (try (string "{}")) -- see #5439
return $ raw <> T.pack finalbraces
inlineCommand :: PandocMonad m => ParsecT Sources ParserState m Inlines
inlineCommand = do
lookAhead (try (char '\\' >> letter))
toks <- getInputTokens
fst <$> rawLaTeXParser toks (inlineEnvironment <|> inlineCommand')
inlines
-- inline elements:
inlineGroup :: PandocMonad m => LP m Inlines
inlineGroup = do
ils <- grouped inline
if null 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
doLHSverb :: PandocMonad m => LP m Inlines
doLHSverb =
codeWith ("",["haskell"],[]) . untokenize
<$> manyTill (satisfyTok (not . isNewlineTok)) (symbol '|')
mkImage :: PandocMonad m => [(Text, Text)] -> Text -> LP m Inlines
mkImage options (T.unpack -> src) = do
let replaceRelative (k,v) =
case numUnit v of
Just (num, "\\textwidth") -> (k, showFl (num * 100) <> "%")
Just (num, "\\linewidth") -> (k, showFl (num * 100) <> "%")
Just (num, "\\textheight") -> (k, showFl (num * 100) <> "%")
_ -> (k, v)
let kvs = map replaceRelative
$ filter (\(k,_) -> k `elem` ["width", "height"]) options
let attr = ("",[], kvs)
let alt = maybe (str "image") str $ lookup "alt" options
defaultExt <- getOption readerDefaultImageExtension
let exts' = [".pdf", ".png", ".jpg", ".mps", ".jpeg", ".jbig2", ".jb2"]
let exts = exts' ++ map (map toUpper) exts'
let findFile s [] = return s
findFile s (e:es) = do
let s' = addExtension s e
exists <- fileExists s'
if exists
then return s'
else findFile s es
src' <- case takeExtension src of
"" | not (T.null defaultExt) -> return $ addExtension src $ T.unpack defaultExt
| otherwise -> findFile src exts
_ -> return src
return $ imageWith attr (T.pack src') "" alt
removeDoubleQuotes :: Text -> Text
removeDoubleQuotes t =
Data.Maybe.fromMaybe t $ T.stripPrefix "\"" t >>= T.stripSuffix "\""
doubleQuote :: PandocMonad m => LP m Inlines
doubleQuote =
quoted' doubleQuoted (try $ count 2 $ symbol '`')
(void $ try $ count 2 $ symbol '\'')
<|> quoted' doubleQuoted ((:[]) <$> symbol '“') (void $ symbol '”')
-- the following is used by babel for localized quotes:
<|> quoted' doubleQuoted (try $ sequence [symbol '"', symbol '`'])
(void $ try $ sequence [symbol '"', symbol '\''])
singleQuote :: PandocMonad m => LP m Inlines
singleQuote =
quoted' singleQuoted ((:[]) <$> symbol '`')
(try $ symbol '\'' >>
notFollowedBy (satisfyTok startsWithLetter))
<|> quoted' singleQuoted ((:[]) <$> symbol '‘')
(try $ symbol '’' >>
notFollowedBy (satisfyTok startsWithLetter))
where startsWithLetter (Tok _ Word t) =
case T.uncons t of
Just (c, _) | isLetter c -> True
_ -> False
startsWithLetter _ = False
quoted' :: PandocMonad m
=> (Inlines -> Inlines)
-> LP m [Tok]
-> LP m ()
-> LP m Inlines
quoted' f starter ender = do
startchs <- untokenize <$> starter
smart <- extensionEnabled Ext_smart <$> getOption readerExtensions
if smart
then do
ils <- many (notFollowedBy ender >> inline)
(ender >> return (f (mconcat ils))) <|>
(<> mconcat ils) <$>
lit (case startchs of
"``" -> "“"
"`" -> "‘"
cs -> cs)
else lit startchs
lit :: Text -> LP m Inlines
lit = pure . str
blockquote :: PandocMonad m => Bool -> Maybe Text -> LP m Blocks
blockquote cvariant mblang = do
citepar <- if cvariant
then (\xs -> para (cite xs mempty))
<$> cites inline NormalCitation False
else option mempty $ para <$> bracketed inline
let lang = mblang >>= babelLangToBCP47
let langdiv = case lang of
Nothing -> id
Just l -> divWith ("",[],[("lang", renderLang l)])
_closingPunct <- option mempty $ bracketed inline -- currently ignored
bs <- grouped block
optional $ symbolIn (".:;?!" :: [Char]) -- currently ignored
return $ blockQuote . langdiv $ (bs <> citepar)
inlineCommand' :: PandocMonad m => LP m Inlines
inlineCommand' = try $ do
Tok _ (CtrlSeq name) cmd <- anyControlSeq
guard $ name /= "begin" && name /= "end" && name /= "and"
star <- if T.all isAlphaNum name
then option "" ("*" <$ symbol '*' <* sp)
else pure ""
overlay <- option "" overlaySpecification
let name' = name <> star <> overlay
let names = nubOrd [name', name] -- check non-starred as fallback
let raw = do
guard $ isInlineCommand name || not (isBlockCommand name)
rawcommand <- getRawCommand name (cmd <> star)
(guardEnabled Ext_raw_tex >> return (rawInline "latex" rawcommand))
<|> ignore rawcommand
lookupListDefault raw names inlineCommands
tok :: PandocMonad m => LP m Inlines
tok = tokWith inline
unescapeURL :: Text -> Text
unescapeURL = T.concat . go . T.splitOn "\\"
where
isEscapable c = T.any (== c) "#$%&~_^\\{}"
go (x:xs) = x : map unescapeInterior xs
go [] = []
unescapeInterior t
| Just (c, _) <- T.uncons t
, isEscapable c = t
| otherwise = "\\" <> t
inlineCommands :: PandocMonad m => M.Map Text (LP m Inlines)
inlineCommands = M.unions
[ accentCommands tok
, citationCommands inline
, siunitxCommands tok
, acronymCommands
, refCommands
, nameCommands
, verbCommands
, charCommands
, enquoteCommands tok
, inlineLanguageCommands tok
, biblatexInlineCommands tok
, rest ]
where
rest = M.fromList
[ ("emph", extractSpaces emph <$> tok)
, ("textit", extractSpaces emph <$> tok)
, ("textsl", extractSpaces emph <$> tok)
, ("textsc", extractSpaces smallcaps <$> tok)
, ("textsf", extractSpaces (spanWith ("",["sans-serif"],[])) <$> tok)
, ("textmd", extractSpaces (spanWith ("",["medium"],[])) <$> tok)
, ("textrm", extractSpaces (spanWith ("",["roman"],[])) <$> tok)
, ("textup", extractSpaces (spanWith ("",["upright"],[])) <$> tok)
, ("texttt", formatCode nullAttr <$> tok)
, ("alert", skipopts >> spanWith ("",["alert"],[]) <$> tok) -- beamer
, ("textsuperscript", extractSpaces superscript <$> tok)
, ("textsubscript", extractSpaces subscript <$> tok)
, ("textbf", extractSpaces strong <$> tok)
, ("textnormal", extractSpaces (spanWith ("",["nodecor"],[])) <$> tok)
, ("underline", underline <$> tok)
, ("mbox", rawInlineOr "mbox" $ processHBox <$> tok)
, ("hbox", rawInlineOr "hbox" $ processHBox <$> tok)
, ("vbox", rawInlineOr "vbox" tok)
, ("lettrine", rawInlineOr "lettrine" lettrine)
, ("(", mathInline . untokenize <$> manyTill anyTok (controlSeq ")"))
, ("[", mathDisplay . untokenize <$> manyTill anyTok (controlSeq "]"))
, ("ensuremath", mathInline . untokenize <$> braced)
, ("texorpdfstring", const <$> tok <*> tok)
-- old TeX commands
, ("em", extractSpaces emph <$> inlines)
, ("it", extractSpaces emph <$> inlines)
, ("sl", extractSpaces emph <$> inlines)
, ("bf", extractSpaces strong <$> inlines)
, ("tt", formatCode nullAttr <$> inlines)
, ("rm", inlines)
, ("itshape", extractSpaces emph <$> inlines)
, ("slshape", extractSpaces emph <$> inlines)
, ("scshape", extractSpaces smallcaps <$> inlines)
, ("bfseries", extractSpaces strong <$> inlines)
, ("MakeUppercase", makeUppercase <$> tok)
, ("MakeTextUppercase", makeUppercase <$> tok) -- textcase
, ("uppercase", makeUppercase <$> tok)
, ("MakeLowercase", makeLowercase <$> tok)
, ("MakeTextLowercase", makeLowercase <$> tok)
, ("lowercase", makeLowercase <$> tok)
, ("thanks", skipopts >> note <$> grouped block)
, ("footnote", skipopts >> footnote)
, ("passthrough", fixPassthroughEscapes <$> tok)
-- \passthrough macro used by latex writer
-- for listings
, ("includegraphics", do options <- option [] keyvals
src <- braced
mkImage options .
unescapeURL .
removeDoubleQuotes $ untokenize src)
-- svg
, ("includesvg", do options <- option [] keyvals
src <- braced
mkImage options .
unescapeURL .
removeDoubleQuotes $ untokenize src)
-- hyperref
, ("url", (\url -> linkWith ("",["uri"],[]) url "" (str url))
. unescapeURL . untokenize <$> bracedUrl)
, ("nolinkurl", code . unescapeURL . untokenize <$> bracedUrl)
, ("href", do url <- bracedUrl
sp
link (unescapeURL $ untokenize url) "" <$> tok)
, ("hyperlink", hyperlink)
, ("hyperref", hyperref)
, ("hypertarget", hypertargetInline)
-- hyphenat
, ("nohyphens", tok)
, ("textnhtt", formatCode nullAttr <$> tok)
, ("nhttfamily", formatCode nullAttr <$> tok)
-- LaTeX colors
, ("textcolor", coloredInline "color")
, ("colorbox", coloredInline "background-color")
-- etoolbox
, ("ifstrequal", ifstrequal)
, ("newtoggle", braced >>= newToggle)
, ("toggletrue", braced >>= setToggle True)
, ("togglefalse", braced >>= setToggle False)
, ("iftoggle", try $ ifToggle >> inline)
-- include
, ("input", rawInlineOr "input" $ include "input")
-- soul package
, ("st", extractSpaces strikeout <$> tok)
, ("ul", underline <$> tok)
, ("hl", extractSpaces (spanWith ("",["mark"],[])) <$> tok)
-- ulem package
, ("sout", extractSpaces strikeout <$> tok)
, ("uline", underline <$> tok)
-- plain tex stuff that should just be passed through as raw tex
, ("ifdim", ifdim)
-- generally only used in \date
, ("today", today)
]
today :: PandocMonad m => LP m Inlines
today =
text . T.pack . showGregorian . localDay . zonedTimeToLocalTime
<$> getZonedTime
footnote :: PandocMonad m => LP m Inlines
footnote = do
updateState $ \st -> st{ sLastNoteNum = sLastNoteNum st + 1 }
contents <- grouped block >>= walkM resolveNoteLabel
return $ note contents
resolveNoteLabel :: PandocMonad m => Inline -> LP m Inline
resolveNoteLabel (Span (_,cls,kvs) _)
| Just lab <- lookup "label" kvs = do
updateState $ \st -> st{
sLabels = M.insert lab (toList . text . tshow $ sLastNoteNum st)
$ sLabels st }
return $ Span (lab,cls,kvs) []
resolveNoteLabel il = return il
lettrine :: PandocMonad m => LP m Inlines
lettrine = do
optional rawopt
x <- tok
y <- tok
return $ extractSpaces (spanWith ("",["lettrine"],[])) x <> smallcaps y
ifdim :: PandocMonad m => LP m Inlines
ifdim = do
contents <- manyTill anyTok (controlSeq "fi")
return $ rawInline "latex" $ "\\ifdim" <> untokenize contents <> "\\fi"
makeUppercase :: Inlines -> Inlines
makeUppercase = fromList . walk (alterStr T.toUpper) . toList
makeLowercase :: Inlines -> Inlines
makeLowercase = fromList . walk (alterStr T.toLower) . toList
alterStr :: (Text -> Text) -> Inline -> Inline
alterStr f (Str xs) = Str (f xs)
alterStr _ x = x
fixPassthroughEscapes :: Inlines -> Inlines
fixPassthroughEscapes = walk go
where
go (Code attr txt) = Code attr (T.pack $ unescapePassthrough $ T.unpack txt)
go x = x
unescapePassthrough [] = []
unescapePassthrough ('\\':c:cs)
| c `elem` ['%','{','}','\\'] = c : unescapePassthrough cs
unescapePassthrough (c:cs) = c : unescapePassthrough cs
hyperlink :: PandocMonad m => LP m Inlines
hyperlink = try $ do
src <- untokenize <$> braced
lab <- tok
return $ link ("#" <> src) "" lab
hyperref :: PandocMonad m => LP m Inlines
hyperref = try $ do
url <- (("#" <>) . untokenize <$> try (sp *> bracketedToks <* sp))
<|> untokenize <$> (bracedUrl <* bracedUrl <* bracedUrl)
link url "" <$> tok
hypertargetBlock :: PandocMonad m => LP m Blocks
hypertargetBlock = try $ do
ref <- untokenize <$> braced
bs <- grouped block
case toList bs of
[Header 1 (ident,_,_) _] | ident == ref -> return bs
_ -> return $ divWith (ref, [], []) bs
hypertargetInline :: PandocMonad m => LP m Inlines
hypertargetInline = try $ do
ref <- untokenize <$> braced
ils <- grouped inline
return $ spanWith (ref, [], []) ils
newToggle :: (Monoid a, PandocMonad m) => [Tok] -> LP m a
newToggle name = do
updateState $ \st ->
st{ sToggles = M.insert (untokenize name) False (sToggles st) }
return mempty
setToggle :: (Monoid a, PandocMonad m) => Bool -> [Tok] -> LP m a
setToggle on name = do
updateState $ \st ->
st{ sToggles = M.adjust (const on) (untokenize name) (sToggles st) }
return mempty
ifToggle :: PandocMonad m => LP m ()
ifToggle = do
name <- braced
spaces
yes <- braced
spaces
no <- braced
toggles <- sToggles <$> getState
TokStream _ inp <- getInput
let name' = untokenize name
case M.lookup name' toggles of
Just True -> setInput $ TokStream False (yes ++ inp)
Just False -> setInput $ TokStream False (no ++ inp)
Nothing -> do
pos <- getPosition
report $ UndefinedToggle name' pos
return ()
ifstrequal :: (PandocMonad m, Monoid a) => LP m a
ifstrequal = do
str1 <- tok
str2 <- tok
ifequal <- braced
ifnotequal <- braced
TokStream _ ts <- getInput
if str1 == str2
then setInput $ TokStream False (ifequal ++ ts)
else setInput $ TokStream False (ifnotequal ++ ts)
return mempty
coloredInline :: PandocMonad m => Text -> LP m Inlines
coloredInline stylename = do
skipopts
color <- braced
spanWith ("",[],[("style",stylename <> ": " <> untokenize color)]) <$> tok
processHBox :: Inlines -> Inlines
processHBox = walk convert
where
convert Space = Str $ T.singleton $ chr 160 -- non-breakable space
convert SoftBreak = Str $ T.singleton $ chr 160 -- non-breakable space
convert LineBreak = Str ""
convert x = x
isBlockCommand :: Text -> Bool
isBlockCommand s =
s `M.member` (blockCommands :: M.Map Text (LP PandocPure Blocks))
|| s `Set.member` treatAsBlock
treatAsBlock :: Set.Set Text
treatAsBlock = Set.fromList
[ "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"
, "clearpage"
, "pagebreak"
, "titleformat"
, "listoffigures"
, "listoftables"
, "write"
]
isInlineCommand :: Text -> Bool
isInlineCommand s =
s `M.member` (inlineCommands :: M.Map Text (LP PandocPure Inlines))
|| s `Set.member` treatAsInline
treatAsInline :: Set.Set Text
treatAsInline = Set.fromList
[ "index"
, "hspace"
, "vspace"
, "noindent"
, "newpage"
, "clearpage"
, "pagebreak"
]
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
inline :: PandocMonad m => LP m Inlines
inline = do
Tok pos toktype t <- peekTok
let eatOneToken = satisfyTok (const True)
let symbolAsString = str t <$ eatOneToken
let unescapedSymbolAsString =
do eatOneToken
report $ ParsingUnescaped t pos
return $ str t
case toktype of
Comment -> mempty <$ eatOneToken
Spaces -> space <$ eatOneToken
Newline -> softbreak <$ endline
Word -> str t <$ eatOneToken
Symbol ->
case t of
"-" -> eatOneToken *>
option (str "-") (symbol '-' *>
option (str "–") (str "—" <$ symbol '-'))
"'" -> eatOneToken *>
option (str "’") (str "”" <$ symbol '\'')
"~" -> str "\160" <$ eatOneToken
"`" -> doubleQuote <|> singleQuote <|> symbolAsString
"\"" -> doubleQuote <|> singleQuote <|> symbolAsString
"“" -> doubleQuote <|> symbolAsString
"‘" -> singleQuote <|> symbolAsString
"$" -> dollarsMath <|> unescapedSymbolAsString
"|" -> (guardEnabled Ext_literate_haskell *>
eatOneToken *> doLHSverb) <|> symbolAsString
"{" -> inlineGroup
"#" -> unescapedSymbolAsString
"&" -> unescapedSymbolAsString
"_" -> unescapedSymbolAsString
"^" -> unescapedSymbolAsString
"\\" -> mzero
"}" -> mzero
_ -> symbolAsString
CtrlSeq _ -> macroDef (rawInline "latex")
<|> inlineGroup
<|> inlineCommand'
<|> inlineEnvironment
Esc1 -> str . T.singleton <$> primEscape
Esc2 -> str . T.singleton <$> primEscape
_ -> mzero
inlines :: PandocMonad m => LP m Inlines
inlines = mconcat <$> many inline
opt :: PandocMonad m => LP m Inlines
opt = do
toks <- try (sp *> bracketedToks <* sp)
-- now parse the toks as inlines
st <- getState
parsed <- runParserT (mconcat <$> many inline) st "bracketed option"
(TokStream False toks)
case parsed of
Right result -> return result
Left e -> throwError $ fromParsecError (toSources toks) e
-- block elements:
preamble :: PandocMonad m => LP m Blocks
preamble = mconcat <$> many preambleBlock
where preambleBlock = (mempty <$ spaces1)
<|> macroDef (rawBlock "latex")
<|> filecontents
<|> (mempty <$ blockCommand)
<|> (mempty <$ braced)
<|> (do notFollowedBy (begin_ "document")
anyTok
return mempty)
rule :: PandocMonad m => LP m Blocks
rule = do
skipopts
width <- T.takeWhile (\c -> isDigit c || c == '.') . stringify <$> tok
_thickness <- tok
-- 0-width rules are used to fix spacing issues:
case safeRead width of
Just (0 :: Double) -> return mempty
_ -> return horizontalRule
paragraph :: PandocMonad m => LP m Blocks
paragraph = do
x <- trimInlines . mconcat <$> many1 inline
if x == mempty
then return mempty
else return $ para x
rawBlockOr :: PandocMonad m => Text -> LP m Blocks -> LP m Blocks
rawBlockOr name fallback = do
-- if raw_tex allowed, don't process
parseRaw <- extensionEnabled Ext_raw_tex <$> getOption readerExtensions
if parseRaw
then rawBlock "latex" <$> getRawCommand name ("\\" <> name)
else fallback
doSubfile :: PandocMonad m => LP m Blocks
doSubfile = do
skipMany opt
f <- T.unpack . removeDoubleQuotes . T.strip . untokenize <$> braced
oldToks <- getInput
setInput $ TokStream False []
insertIncluded (ensureExtension (/= "") ".tex" f)
bs <- blocks
eof
setInput oldToks
return bs
include :: (PandocMonad m, Monoid a) => Text -> LP m a
include name = do
let isAllowed =
case name of
"include" -> (== ".tex")
"input" -> (/= "")
_ -> const False
skipMany opt
fs <- map (T.unpack . removeDoubleQuotes . T.strip) . T.splitOn "," .
untokenize <$> braced
mapM_ (insertIncluded . ensureExtension isAllowed ".tex") fs
return mempty
usepackage :: (PandocMonad m, Monoid a) => LP m a
usepackage = do
skipMany opt
fs <- map (T.unpack . removeDoubleQuotes . T.strip) . T.splitOn "," .
untokenize <$> braced
let parsePackage f = do
TokStream _ ts <- getIncludedToks (ensureExtension (== ".sty") ".sty" f)
parseFromToks (do _ <- blocks
eof <|>
do pos <- getPosition
report $ CouldNotParseIncludeFile (T.pack f) pos)
ts
mapM_ parsePackage fs
return mempty
readFileFromTexinputs :: PandocMonad m => FilePath -> LP m (Maybe Text)
readFileFromTexinputs fp = do
fileContentsMap <- sFileContents <$> getState
case M.lookup (T.pack fp) fileContentsMap of
Just t -> return (Just t)
Nothing -> do
dirs <- map (\t -> if T.null t
then "."
else T.unpack t)
. T.split (==':') . fromMaybe ""
<$> lookupEnv "TEXINPUTS"
readFileFromDirs dirs fp
ensureExtension :: (FilePath -> Bool) -> FilePath -> FilePath -> FilePath
ensureExtension isAllowed defaultExt fp =
let ext = takeExtension fp
in if isAllowed ext
then fp
else addExtension fp defaultExt
getIncludedToks :: PandocMonad m
=> FilePath
-> LP m TokStream
getIncludedToks f = do
pos <- getPosition
containers <- getIncludeFiles <$> getState
when (T.pack f `elem` containers) $
throwError $ PandocParseError $ T.pack $ "Include file loop at " ++ show pos
updateState $ addIncludeFile $ T.pack f
mbcontents <- readFileFromTexinputs f
contents <- case mbcontents of
Just s -> return s
Nothing -> do
report $ CouldNotLoadIncludeFile (T.pack f) pos
return ""
updateState dropLatestIncludeFile
return $ TokStream False $ tokenize (initialPos f) contents
insertIncluded :: PandocMonad m
=> FilePath
-> LP m ()
insertIncluded f = do
contents <- getIncludedToks f
ts <- getInput
setInput $ contents <> ts
authors :: PandocMonad m => LP m ()
authors = try $ do
bgroup
let oneAuthor = blocksToInlines' . B.toList . mconcat <$> many1 block
auths <- sepBy oneAuthor (controlSeq "and")
egroup
addMeta "author" (map trimInlines auths)
looseItem :: PandocMonad m => LP m Blocks
looseItem = do
inListItem <- sInListItem <$> getState
guard $ not inListItem
skipopts
return mempty
epigraph :: PandocMonad m => LP m Blocks
epigraph = do
p1 <- grouped block
p2 <- grouped block
return $ divWith ("", ["epigraph"], []) (p1 <> p2)
section :: PandocMonad m => Attr -> Int -> LP m Blocks
section (ident, classes, kvs) lvl = do
skipopts
contents <- grouped inline
lab <- option ident $
try (spaces >> controlSeq "label"
>> spaces >> untokenize <$> braced)
when (lvl == 0) $
updateState $ \st -> st{ sHasChapters = True }
unless ("unnumbered" `elem` classes) $ do
hn <- sLastHeaderNum <$> getState
hasChapters <- sHasChapters <$> getState
let lvl' = lvl + if hasChapters then 1 else 0
let num = incrementDottedNum lvl' hn
updateState $ \st -> st{ sLastHeaderNum = num
, sLabels = M.insert lab
[Str (renderDottedNum num)]
(sLabels st) }
attr' <- registerHeader (lab, classes, kvs) contents
return $ headerWith attr' lvl contents
blockCommand :: PandocMonad m => LP m Blocks
blockCommand = try $ do
Tok _ (CtrlSeq name) txt <- anyControlSeq
guard $ name /= "begin" && name /= "end" && name /= "and"
star <- option "" ("*" <$ symbol '*' <* sp)
let name' = name <> star
let names = nubOrd [name', name]
let rawDefiniteBlock = do
guard $ isBlockCommand name
rawcontents <- getRawCommand name (txt <> star)
(guardEnabled Ext_raw_tex >> return (rawBlock "latex" rawcontents))
<|> ignore rawcontents
-- heuristic: if it could be either block or inline, we
-- treat it if block if we have a sequence of block
-- commands followed by a newline. But we stop if we
-- hit a \startXXX, since this might start a raw ConTeXt
-- environment (this is important because this parser is
-- used by the Markdown reader).
let startCommand = try $ do
Tok _ (CtrlSeq n) _ <- anyControlSeq
guard $ "start" `T.isPrefixOf` n
let rawMaybeBlock = try $ do
guard $ not $ isInlineCommand name
rawcontents <- getRawCommand name (txt <> star)
curr <- (guardEnabled Ext_raw_tex >>
return (rawBlock "latex" rawcontents))
<|> ignore rawcontents
rest <- many $ notFollowedBy startCommand *> blockCommand
lookAhead $ blankline <|> startCommand
return $ curr <> mconcat rest
let raw = rawDefiniteBlock <|> rawMaybeBlock
lookupListDefault raw names blockCommands
closing :: PandocMonad m => LP m Blocks
closing = do
contents <- tok
st <- getState
let extractInlines (MetaBlocks [Plain ys]) = ys
extractInlines (MetaBlocks [Para ys ]) = ys
extractInlines _ = []
let sigs = case lookupMeta "author" (sMeta st) of
Just (MetaList xs) ->
para $ trimInlines $ fromList $
intercalate [LineBreak] $ map extractInlines xs
_ -> mempty
return $ para (trimInlines contents) <> sigs
parbox :: PandocMonad m => LP m Blocks
parbox = try $ do
skipopts
braced -- size
oldInTableCell <- sInTableCell <$> getState
-- see #5711
updateState $ \st -> st{ sInTableCell = False }
res <- grouped block
updateState $ \st -> st{ sInTableCell = oldInTableCell }
return res
blockCommands :: PandocMonad m => M.Map Text (LP m Blocks)
blockCommands = M.fromList
[ ("par", mempty <$ skipopts)
, ("parbox", parbox)
, ("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"))
, ("newtheorem", newtheorem inline)
, ("theoremstyle", theoremstyle)
-- KOMA-Script metadata commands
, ("extratitle", mempty <$ (skipopts *> tok >>= addMeta "extratitle"))
, ("frontispiece", mempty <$ (skipopts *> tok >>= addMeta "frontispiece"))
, ("titlehead", mempty <$ (skipopts *> tok >>= addMeta "titlehead"))
, ("subject", mempty <$ (skipopts *> tok >>= addMeta "subject"))
, ("publishers", mempty <$ (skipopts *> tok >>= addMeta "publishers"))
, ("uppertitleback", mempty <$ (skipopts *> tok >>= addMeta "uppertitleback"))
, ("lowertitleback", mempty <$ (skipopts *> tok >>= addMeta "lowertitleback"))
, ("dedication", mempty <$ (skipopts *> tok >>= addMeta "dedication"))
-- sectioning
, ("part", section nullAttr (-1))
, ("part*", section ("",["unnumbered"],[]) (-1))
, ("chapter", section nullAttr 0)
, ("chapter*", 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 <$> (skipopts *> tok))
, ("closing", skipopts *> closing)
-- memoir
, ("plainbreak", braced >> pure horizontalRule)
, ("plainbreak*", braced >> pure horizontalRule)
, ("fancybreak", braced >> pure horizontalRule)
, ("fancybreak*", braced >> pure horizontalRule)
, ("plainfancybreak", braced >> braced >> braced >> pure horizontalRule)
, ("plainfancybreak*", braced >> braced >> braced >> pure horizontalRule)
, ("pfbreak", pure horizontalRule)
, ("pfbreak*", pure horizontalRule)
--
, ("hrule", pure horizontalRule)
, ("strut", pure mempty)
, ("rule", rule)
, ("item", looseItem)
, ("documentclass", skipopts *> braced *> preamble)
, ("centerline", para . trimInlines <$> (skipopts *> tok))
, ("caption", mempty <$ setCaption inline)
, ("bibliography", mempty <$ (skipopts *> braced >>=
addMeta "bibliography" . splitBibs . untokenize))
, ("addbibresource", mempty <$ (skipopts *> braced >>=
addMeta "bibliography" . splitBibs . untokenize))
, ("endinput", mempty <$ skipSameFileToks)
-- includes
, ("lstinputlisting", inputListing)
, ("inputminted", inputMinted)
, ("graphicspath", graphicsPath)
-- polyglossia
, ("setdefaultlanguage", setDefaultLanguage)
, ("setmainlanguage", setDefaultLanguage)
-- hyperlink
, ("hypertarget", hypertargetBlock)
-- LaTeX colors
, ("textcolor", coloredBlock "color")
, ("colorbox", coloredBlock "background-color")
-- csquotes
, ("blockquote", blockquote False Nothing)
, ("blockcquote", blockquote True Nothing)
, ("foreignblockquote", braced >>= blockquote False . Just . untokenize)
, ("foreignblockcquote", braced >>= blockquote True . Just . untokenize)
, ("hyphenblockquote", braced >>= blockquote False . Just . untokenize)
, ("hyphenblockcquote", braced >>= blockquote True . Just . untokenize)
-- include
, ("include", rawBlockOr "include" $ include "include")
, ("input", rawBlockOr "input" $ include "input")
, ("subfile", rawBlockOr "subfile" doSubfile)
, ("usepackage", rawBlockOr "usepackage" usepackage)
-- preamble
, ("PackageError", mempty <$ (braced >> braced >> braced))
-- epigraph package
, ("epigraph", epigraph)
-- alignment