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+{-# LANGUAGE NoImplicitPrelude #-}
+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+{-
+Copyright (C) 2006-2018 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.Parsing
+ Copyright : Copyright (C) 2006-2018 John MacFarlane
+ License : GNU GPL, version 2 or above
+
+ Maintainer : John MacFarlane <jgm@berkeley.edu>
+ Stability : alpha
+ Portability : portable
+
+General parsing types and functions for LaTeX.
+-}
+module Text.Pandoc.Readers.LaTeX.Parsing
+ ( DottedNum(..)
+ , renderDottedNum
+ , incrementDottedNum
+ , LaTeXState(..)
+ , defaultLaTeXState
+ , LP
+ , withVerbatimMode
+ , rawLaTeXParser
+ , applyMacros
+ , tokenize
+ , untokenize
+ , untoken
+ , totoks
+ , toksToString
+ , satisfyTok
+ , doMacros
+ , setpos
+ , anyControlSeq
+ , anySymbol
+ , isWordTok
+ , isNewlineTok
+ , spaces
+ , spaces1
+ , tokTypeIn
+ , controlSeq
+ , symbol
+ , symbolIn
+ , sp
+ , whitespace
+ , newlineTok
+ , comment
+ , anyTok
+ , singleChar
+ , specialChars
+ , endline
+ , blankline
+ , primEscape
+ , bgroup
+ , egroup
+ , grouped
+ , braced
+ , braced'
+ , bracedUrl
+ , bracedOrToken
+ , bracketed
+ , bracketedToks
+ , parenWrapped
+ , dimenarg
+ , ignore
+ , withRaw
+ ) where
+
+import Prelude
+import Control.Applicative (many, (<|>))
+import Control.Monad
+import Control.Monad.Except (throwError)
+import Control.Monad.Trans (lift)
+import Data.Char (chr, isAlphaNum, isDigit, isLetter, ord)
+import Data.Default
+import Data.List (intercalate)
+import qualified Data.Map as M
+import qualified Data.Set as Set
+import Data.Text (Text)
+import qualified Data.Text as T
+import Text.Pandoc.Builder
+import Text.Pandoc.Class (PandocMonad, report)
+import Text.Pandoc.Error (PandocError (PandocMacroLoop))
+import Text.Pandoc.Logging
+import Text.Pandoc.Options
+import Text.Pandoc.Parsing hiding (blankline, many, mathDisplay, mathInline,
+ optional, space, spaces, withRaw, (<|>))
+import Text.Pandoc.Readers.LaTeX.Types (ExpansionPoint (..), Macro (..),
+ ArgSpec (..), Tok (..), TokType (..))
+import Text.Pandoc.Shared
+import Text.Parsec.Pos
+
+newtype DottedNum = DottedNum [Int]
+ deriving (Show)
+
+renderDottedNum :: DottedNum -> String
+renderDottedNum (DottedNum xs) =
+ intercalate "." (map show xs)
+
+incrementDottedNum :: Int -> DottedNum -> DottedNum
+incrementDottedNum level (DottedNum ns) = DottedNum $
+ case reverse (take level (ns ++ repeat 0)) of
+ (x:xs) -> reverse (x+1 : xs)
+ [] -> [] -- shouldn't happen
+
+data LaTeXState = LaTeXState{ sOptions :: ReaderOptions
+ , sMeta :: Meta
+ , sQuoteContext :: QuoteContext
+ , sMacros :: M.Map Text Macro
+ , sContainers :: [String]
+ , sHeaders :: M.Map Inlines String
+ , sLogMessages :: [LogMessage]
+ , sIdentifiers :: Set.Set String
+ , sVerbatimMode :: Bool
+ , sCaption :: (Maybe Inlines, Maybe String)
+ , sInListItem :: Bool
+ , sInTableCell :: Bool
+ , sLastHeaderNum :: DottedNum
+ , sLastFigureNum :: DottedNum
+ , sLabels :: M.Map String [Inline]
+ , sHasChapters :: Bool
+ , sToggles :: M.Map String Bool
+ }
+ deriving Show
+
+defaultLaTeXState :: LaTeXState
+defaultLaTeXState = LaTeXState{ sOptions = def
+ , sMeta = nullMeta
+ , sQuoteContext = NoQuote
+ , sMacros = M.empty
+ , sContainers = []
+ , sHeaders = M.empty
+ , sLogMessages = []
+ , sIdentifiers = Set.empty
+ , sVerbatimMode = False
+ , sCaption = (Nothing, Nothing)
+ , sInListItem = False
+ , sInTableCell = False
+ , sLastHeaderNum = DottedNum []
+ , sLastFigureNum = DottedNum []
+ , sLabels = M.empty
+ , sHasChapters = False
+ , sToggles = M.empty
+ }
+
+instance PandocMonad m => HasQuoteContext LaTeXState m where
+ getQuoteContext = sQuoteContext <$> getState
+ withQuoteContext context parser = do
+ oldState <- getState
+ let oldQuoteContext = sQuoteContext oldState
+ setState oldState { sQuoteContext = context }
+ result <- parser
+ newState <- getState
+ setState newState { sQuoteContext = oldQuoteContext }
+ return result
+
+instance HasLogMessages LaTeXState where
+ addLogMessage msg st = st{ sLogMessages = msg : sLogMessages st }
+ getLogMessages st = reverse $ sLogMessages st
+
+instance HasIdentifierList LaTeXState where
+ extractIdentifierList = sIdentifiers
+ updateIdentifierList f st = st{ sIdentifiers = f $ sIdentifiers st }
+
+instance HasIncludeFiles LaTeXState where
+ getIncludeFiles = sContainers
+ addIncludeFile f s = s{ sContainers = f : sContainers s }
+ dropLatestIncludeFile s = s { sContainers = drop 1 $ sContainers s }
+
+instance HasHeaderMap LaTeXState where
+ extractHeaderMap = sHeaders
+ updateHeaderMap f st = st{ sHeaders = f $ sHeaders st }
+
+instance HasMacros LaTeXState where
+ extractMacros st = sMacros st
+ updateMacros f st = st{ sMacros = f (sMacros st) }
+
+instance HasReaderOptions LaTeXState where
+ extractReaderOptions = sOptions
+
+instance HasMeta LaTeXState where
+ setMeta field val st =
+ st{ sMeta = setMeta field val $ sMeta st }
+ deleteMeta field st =
+ st{ sMeta = deleteMeta field $ sMeta st }
+
+instance Default LaTeXState where
+ def = defaultLaTeXState
+
+type LP m = ParserT [Tok] LaTeXState m
+
+withVerbatimMode :: PandocMonad m => LP m a -> LP m a
+withVerbatimMode parser = do
+ updateState $ \st -> st{ sVerbatimMode = True }
+ result <- parser
+ updateState $ \st -> st{ sVerbatimMode = False }
+ return result
+
+rawLaTeXParser :: (PandocMonad m, HasMacros s, HasReaderOptions s)
+ => Bool -> LP m a -> LP m a -> ParserT String s m (a, String)
+rawLaTeXParser retokenize parser valParser = do
+ inp <- getInput
+ let toks = tokenize "source" $ T.pack inp
+ pstate <- getState
+ let lstate = def{ sOptions = extractReaderOptions pstate }
+ let lstate' = lstate { sMacros = extractMacros pstate }
+ let rawparser = (,) <$> withRaw valParser <*> getState
+ res' <- lift $ runParserT (snd <$> withRaw parser) lstate "chunk" toks
+ case res' of
+ Left _ -> mzero
+ Right toks' -> do
+ res <- lift $ runParserT (do when retokenize $ do
+ -- retokenize, applying macros
+ doMacros 0
+ ts <- many (satisfyTok (const True))
+ setInput ts
+ rawparser)
+ lstate' "chunk" toks'
+ case res of
+ Left _ -> mzero
+ Right ((val, raw), st) -> do
+ updateState (updateMacros (sMacros st <>))
+ _ <- takeP (T.length (untokenize toks'))
+ return (val, T.unpack (untokenize raw))
+
+applyMacros :: (PandocMonad m, HasMacros s, HasReaderOptions s)
+ => String -> ParserT String s m String
+applyMacros s = (guardDisabled Ext_latex_macros >> return s) <|>
+ do let retokenize = doMacros 0 *>
+ (toksToString <$> many (satisfyTok (const True)))
+ pstate <- getState
+ let lstate = def{ sOptions = extractReaderOptions pstate
+ , sMacros = extractMacros pstate }
+ res <- runParserT retokenize lstate "math" (tokenize "math" (T.pack s))
+ case res of
+ Left e -> fail (show e)
+ Right s' -> return s'
+tokenize :: SourceName -> Text -> [Tok]
+tokenize sourcename = totoks (initialPos sourcename)
+
+totoks :: SourcePos -> Text -> [Tok]
+totoks pos t =
+ case T.uncons t of
+ Nothing -> []
+ Just (c, rest)
+ | c == '\n' ->
+ Tok pos Newline "\n"
+ : totoks (setSourceColumn (incSourceLine pos 1) 1) rest
+ | isSpaceOrTab c ->
+ let (sps, rest') = T.span isSpaceOrTab t
+ in Tok pos Spaces sps
+ : totoks (incSourceColumn pos (T.length sps))
+ rest'
+ | isAlphaNum c ->
+ let (ws, rest') = T.span isAlphaNum t
+ in Tok pos Word ws
+ : totoks (incSourceColumn pos (T.length ws)) rest'
+ | c == '%' ->
+ let (cs, rest') = T.break (== '\n') rest
+ in Tok pos Comment ("%" <> cs)
+ : totoks (incSourceColumn pos (1 + T.length cs)) rest'
+ | c == '\\' ->
+ case T.uncons rest of
+ Nothing -> [Tok pos (CtrlSeq " ") "\\"]
+ Just (d, rest')
+ | isLetterOrAt d ->
+ -- \makeatletter is common in macro defs;
+ -- ideally we should make tokenization sensitive
+ -- to \makeatletter and \makeatother, but this is
+ -- probably best for now
+ let (ws, rest'') = T.span isLetterOrAt rest
+ (ss, rest''') = T.span isSpaceOrTab rest''
+ in Tok pos (CtrlSeq ws) ("\\" <> ws <> ss)
+ : totoks (incSourceColumn pos
+ (1 + T.length ws + T.length ss)) rest'''
+ | isSpaceOrTab d || d == '\n' ->
+ let (w1, r1) = T.span isSpaceOrTab rest
+ (w2, (w3, r3)) = case T.uncons r1 of
+ Just ('\n', r2)
+ -> (T.pack "\n",
+ T.span isSpaceOrTab r2)
+ _ -> (mempty, (mempty, r1))
+ ws = "\\" <> w1 <> w2 <> w3
+ in case T.uncons r3 of
+ Just ('\n', _) ->
+ Tok pos (CtrlSeq " ") ("\\" <> w1)
+ : totoks (incSourceColumn pos (T.length ws))
+ r1
+ _ ->
+ Tok pos (CtrlSeq " ") ws
+ : totoks (incSourceColumn pos (T.length ws))
+ r3
+ | otherwise ->
+ Tok pos (CtrlSeq (T.singleton d)) (T.pack [c,d])
+ : totoks (incSourceColumn pos 2) rest'
+ | c == '#' ->
+ let (t1, t2) = T.span (\d -> d >= '0' && d <= '9') rest
+ in case safeRead (T.unpack t1) of
+ Just i ->
+ Tok pos (Arg i) ("#" <> t1)
+ : totoks (incSourceColumn pos (1 + T.length t1)) t2
+ Nothing ->
+ Tok pos Symbol "#"
+ : totoks (incSourceColumn pos 1) t2
+ | c == '^' ->
+ case T.uncons rest of
+ Just ('^', rest') ->
+ case T.uncons rest' of
+ Just (d, rest'')
+ | isLowerHex d ->
+ case T.uncons rest'' of
+ Just (e, rest''') | isLowerHex e ->
+ Tok pos Esc2 (T.pack ['^','^',d,e])
+ : totoks (incSourceColumn pos 4) rest'''
+ _ ->
+ Tok pos Esc1 (T.pack ['^','^',d])
+ : totoks (incSourceColumn pos 3) rest''
+ | d < '\128' ->
+ Tok pos Esc1 (T.pack ['^','^',d])
+ : totoks (incSourceColumn pos 3) rest''
+ _ -> Tok pos Symbol "^" :
+ Tok (incSourceColumn pos 1) Symbol "^" :
+ totoks (incSourceColumn pos 2) rest'
+ _ -> Tok pos Symbol "^"
+ : totoks (incSourceColumn pos 1) rest
+ | otherwise ->
+ Tok pos Symbol (T.singleton c) : totoks (incSourceColumn pos 1) rest
+
+isSpaceOrTab :: Char -> Bool
+isSpaceOrTab ' ' = True
+isSpaceOrTab '\t' = True
+isSpaceOrTab _ = False
+
+isLetterOrAt :: Char -> Bool
+isLetterOrAt '@' = True
+isLetterOrAt c = isLetter c
+
+isLowerHex :: Char -> Bool
+isLowerHex x = x >= '0' && x <= '9' || x >= 'a' && x <= 'f'
+
+untokenize :: [Tok] -> Text
+untokenize = mconcat . map untoken
+
+untoken :: Tok -> Text
+untoken (Tok _ _ t) = t
+
+toksToString :: [Tok] -> String
+toksToString = T.unpack . untokenize
+
+satisfyTok :: PandocMonad m => (Tok -> Bool) -> LP m Tok
+satisfyTok f =
+ try $ do
+ res <- tokenPrim (T.unpack . untoken) updatePos matcher
+ doMacros 0 -- apply macros on remaining input stream
+ return res
+ where matcher t | f t = Just t
+ | otherwise = Nothing
+ updatePos :: SourcePos -> Tok -> [Tok] -> SourcePos
+ updatePos _spos _ (Tok pos _ _ : _) = pos
+ updatePos spos _ [] = incSourceColumn spos 1
+
+doMacros :: PandocMonad m => Int -> LP m ()
+doMacros n = do
+ verbatimMode <- sVerbatimMode <$> getState
+ unless verbatimMode $ do
+ inp <- getInput
+ case inp of
+ Tok spos (CtrlSeq "begin") _ : Tok _ Symbol "{" :
+ Tok _ Word name : Tok _ Symbol "}" : ts
+ -> handleMacros spos name ts
+ Tok spos (CtrlSeq "end") _ : Tok _ Symbol "{" :
+ Tok _ Word name : Tok _ Symbol "}" : ts
+ -> handleMacros spos ("end" <> name) ts
+ Tok _ (CtrlSeq "expandafter") _ : t : ts
+ -> do setInput ts
+ doMacros n
+ getInput >>= setInput . combineTok t
+ Tok spos (CtrlSeq name) _ : ts
+ -> handleMacros spos name ts
+ _ -> return ()
+ where combineTok (Tok spos (CtrlSeq name) x) (Tok _ Word w : ts)
+ | T.all isLetterOrAt w =
+ Tok spos (CtrlSeq (name <> w)) (x1 <> w <> x2) : ts
+ where (x1, x2) = T.break isSpaceOrTab x
+ combineTok t ts = t:ts
+ handleMacros spos name ts = do
+ macros <- sMacros <$> getState
+ case M.lookup name macros of
+ Nothing -> return ()
+ Just (Macro expansionPoint argspecs optarg newtoks) -> do
+ setInput ts
+ let matchTok (Tok _ toktype txt) =
+ satisfyTok (\(Tok _ toktype' txt') ->
+ toktype == toktype' &&
+ txt == txt')
+ let matchPattern toks = try $ mapM_ matchTok toks
+ let getargs argmap [] = return argmap
+ getargs argmap (Pattern toks : rest) = try $ do
+ matchPattern toks
+ getargs argmap rest
+ getargs argmap (ArgNum i : Pattern toks : rest) =
+ try $ do
+ x <- mconcat <$> manyTill
+ (braced <|> ((:[]) <$> anyTok))
+ (matchPattern toks)
+ getargs (M.insert i x argmap) rest
+ getargs argmap (ArgNum i : rest) = do
+ x <- try $ spaces >> bracedOrToken
+ getargs (M.insert i x argmap) rest
+ args <- case optarg of
+ Nothing -> getargs M.empty argspecs
+ Just o -> do
+ x <- option o bracketedToks
+ getargs (M.singleton 1 x) argspecs
+ -- first boolean param is true if we're tokenizing
+ -- an argument (in which case we don't want to
+ -- expand #1 etc.)
+ let addTok False (Tok _ (Arg i) _) acc =
+ case M.lookup i args of
+ Nothing -> mzero
+ Just xs -> foldr (addTok True) acc xs
+ -- see #4007
+ addTok _ (Tok _ (CtrlSeq x) txt)
+ acc@(Tok _ Word _ : _)
+ | not (T.null txt) &&
+ isLetter (T.last txt) =
+ Tok spos (CtrlSeq x) (txt <> " ") : acc
+ addTok _ t acc = setpos spos t : acc
+ ts' <- getInput
+ setInput $ foldr (addTok False) ts' newtoks
+ case expansionPoint of
+ ExpandWhenUsed ->
+ if n > 20 -- detect macro expansion loops
+ then throwError $ PandocMacroLoop (T.unpack name)
+ else doMacros (n + 1)
+ ExpandWhenDefined -> return ()
+
+
+setpos :: SourcePos -> Tok -> Tok
+setpos spos (Tok _ tt txt) = Tok spos tt txt
+
+anyControlSeq :: PandocMonad m => LP m Tok
+anyControlSeq = satisfyTok isCtrlSeq
+
+isCtrlSeq :: Tok -> Bool
+isCtrlSeq (Tok _ (CtrlSeq _) _) = True
+isCtrlSeq _ = False
+
+anySymbol :: PandocMonad m => LP m Tok
+anySymbol = satisfyTok isSymbolTok
+
+isSymbolTok :: Tok -> Bool
+isSymbolTok (Tok _ Symbol _) = True
+isSymbolTok _ = False
+
+isWordTok :: Tok -> Bool
+isWordTok (Tok _ Word _) = True
+isWordTok _ = False
+
+spaces :: PandocMonad m => LP m ()
+spaces = skipMany (satisfyTok (tokTypeIn [Comment, Spaces, Newline]))
+
+spaces1 :: PandocMonad m => LP m ()
+spaces1 = skipMany1 (satisfyTok (tokTypeIn [Comment, Spaces, Newline]))
+
+tokTypeIn :: [TokType] -> Tok -> Bool
+tokTypeIn toktypes (Tok _ tt _) = tt `elem` toktypes
+
+controlSeq :: PandocMonad m => Text -> LP m Tok
+controlSeq name = satisfyTok isNamed
+ where isNamed (Tok _ (CtrlSeq n) _) = n == name
+ isNamed _ = False
+
+symbol :: PandocMonad m => Char -> LP m Tok
+symbol c = satisfyTok isc
+ where isc (Tok _ Symbol d) = case T.uncons d of
+ Just (c',_) -> c == c'
+ _ -> False
+ isc _ = False
+
+symbolIn :: PandocMonad m => [Char] -> LP m Tok
+symbolIn cs = satisfyTok isInCs
+ where isInCs (Tok _ Symbol d) = case T.uncons d of
+ Just (c,_) -> c `elem` cs
+ _ -> False
+ isInCs _ = False
+
+sp :: PandocMonad m => LP m ()
+sp = whitespace <|> endline
+
+whitespace :: PandocMonad m => LP m ()
+whitespace = () <$ satisfyTok isSpaceTok
+
+isSpaceTok :: Tok -> Bool
+isSpaceTok (Tok _ Spaces _) = True
+isSpaceTok _ = False
+
+newlineTok :: PandocMonad m => LP m ()
+newlineTok = () <$ satisfyTok isNewlineTok
+
+isNewlineTok :: Tok -> Bool
+isNewlineTok (Tok _ Newline _) = True
+isNewlineTok _ = False
+
+comment :: PandocMonad m => LP m ()
+comment = () <$ satisfyTok isCommentTok
+
+isCommentTok :: Tok -> Bool
+isCommentTok (Tok _ Comment _) = True
+isCommentTok _ = False
+
+anyTok :: PandocMonad m => LP m Tok
+anyTok = satisfyTok (const True)
+
+singleChar :: PandocMonad m => LP m Tok
+singleChar = try $ do
+ Tok pos toktype t <- satisfyTok (tokTypeIn [Word, Symbol])
+ guard $ not $ toktype == Symbol &&
+ T.any (`Set.member` specialChars) t
+ if T.length t > 1
+ then do
+ let (t1, t2) = (T.take 1 t, T.drop 1 t)
+ inp <- getInput
+ setInput $ Tok (incSourceColumn pos 1) toktype t2 : inp
+ return $ Tok pos toktype t1
+ else return $ Tok pos toktype t
+
+specialChars :: Set.Set Char
+specialChars = Set.fromList "#$%&~_^\\{}"
+
+endline :: PandocMonad m => LP m ()
+endline = try $ do
+ newlineTok
+ lookAhead anyTok
+ notFollowedBy blankline
+
+blankline :: PandocMonad m => LP m ()
+blankline = try $ skipMany whitespace *> newlineTok
+
+primEscape :: PandocMonad m => LP m Char
+primEscape = do
+ Tok _ toktype t <- satisfyTok (tokTypeIn [Esc1, Esc2])
+ case toktype of
+ Esc1 -> case T.uncons (T.drop 2 t) of
+ Just (c, _)
+ | c >= '\64' && c <= '\127' -> return (chr (ord c - 64))
+ | otherwise -> return (chr (ord c + 64))
+ Nothing -> fail "Empty content of Esc1"
+ Esc2 -> case safeRead ('0':'x':T.unpack (T.drop 2 t)) of
+ Just x -> return (chr x)
+ Nothing -> fail $ "Could not read: " ++ T.unpack t
+ _ -> fail "Expected an Esc1 or Esc2 token" -- should not happen
+
+bgroup :: PandocMonad m => LP m Tok
+bgroup = try $ do
+ skipMany sp
+ symbol '{' <|> controlSeq "bgroup" <|> controlSeq "begingroup"
+
+egroup :: PandocMonad m => LP m Tok
+egroup = symbol '}' <|> controlSeq "egroup" <|> controlSeq "endgroup"
+
+grouped :: (PandocMonad m, Monoid a) => LP m a -> LP m a
+grouped parser = try $ do
+ bgroup
+ -- first we check for an inner 'grouped', because
+ -- {{a,b}} should be parsed the same as {a,b}
+ try (grouped parser <* egroup) <|> (mconcat <$> manyTill parser egroup)
+
+braced' :: PandocMonad m => LP m Tok -> Int -> LP m [Tok]
+braced' getTok n =
+ handleEgroup <|> handleBgroup <|> handleOther
+ where handleEgroup = do
+ t <- egroup
+ if n == 1
+ then return []
+ else (t:) <$> braced' getTok (n - 1)
+ handleBgroup = do
+ t <- bgroup
+ (t:) <$> braced' getTok (n + 1)
+ handleOther = do
+ t <- getTok
+ (t:) <$> braced' getTok n
+
+braced :: PandocMonad m => LP m [Tok]
+braced = bgroup *> braced' anyTok 1
+
+-- URLs require special handling, because they can contain %
+-- characters. So we retonenize comments as we go...
+bracedUrl :: PandocMonad m => LP m [Tok]
+bracedUrl = bgroup *> braced' (retokenizeComment >> anyTok) 1
+
+-- For handling URLs, which allow literal % characters...
+retokenizeComment :: PandocMonad m => LP m ()
+retokenizeComment = (do
+ Tok pos Comment txt <- satisfyTok isCommentTok
+ let updPos (Tok pos' toktype' txt') =
+ Tok (incSourceColumn (incSourceLine pos' (sourceLine pos - 1))
+ (sourceColumn pos)) toktype' txt'
+ let newtoks = map updPos $ tokenize (sourceName pos) $ T.tail txt
+ getInput >>= setInput . ((Tok pos Symbol "%" : newtoks) ++))
+ <|> return ()
+
+bracedOrToken :: PandocMonad m => LP m [Tok]
+bracedOrToken = braced <|> ((:[]) <$> (anyControlSeq <|> singleChar))
+
+bracketed :: PandocMonad m => Monoid a => LP m a -> LP m a
+bracketed parser = try $ do
+ symbol '['
+ mconcat <$> manyTill parser (symbol ']')
+
+bracketedToks :: PandocMonad m => LP m [Tok]
+bracketedToks = do
+ symbol '['
+ mconcat <$> manyTill (braced <|> (:[]) <$> anyTok) (symbol ']')
+
+parenWrapped :: PandocMonad m => Monoid a => LP m a -> LP m a
+parenWrapped parser = try $ do
+ symbol '('
+ mconcat <$> manyTill parser (symbol ')')
+
+dimenarg :: PandocMonad m => LP m Text
+dimenarg = try $ do
+ ch <- option False $ True <$ symbol '='
+ Tok _ _ s <- satisfyTok isWordTok
+ guard $ T.take 2 (T.reverse s) `elem`
+ ["pt","pc","in","bp","cm","mm","dd","cc","sp"]
+ let num = T.take (T.length s - 2) s
+ guard $ T.length num > 0
+ guard $ T.all isDigit num
+ return $ T.pack ['=' | ch] <> s
+
+ignore :: (Monoid a, PandocMonad m) => String -> ParserT s u m a
+ignore raw = do
+ pos <- getPosition
+ report $ SkippedContent raw pos
+ return mempty
+
+withRaw :: PandocMonad m => LP m a -> LP m (a, [Tok])
+withRaw parser = do
+ inp <- getInput
+ result <- parser
+ nxt <- option (Tok (initialPos "source") Word "") (lookAhead anyTok)
+ let raw = takeWhile (/= nxt) inp
+ return (result, raw)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 18:55:04 +0000