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|
{-# LANGUAGE FlexibleContexts #-}
{-
Copyright (C) 2017 Alexander Krotov <ilabdsf@gmail.com>
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.Muse
Copyright : Copyright (C) 2017 Alexander Krotov
License : GNU GPL, version 2 or above
Maintainer : Alexander Krotov <ilabdsf@gmail.com>
Stability : alpha
Portability : portable
Conversion of Muse text to 'Pandoc' document.
-}
{-
TODO:
- Page breaks (five "*")
- Headings with anchors (make it round trip with Muse writer)
- Org tables
- table.el tables
- Images with attributes (floating and width)
- Citations and <biblio>
- <play> environment
-}
module Text.Pandoc.Readers.Muse (readMuse) where
import Control.Monad
import Control.Monad.Except (throwError)
import Data.Char (isLetter)
import Data.List (stripPrefix)
import qualified Data.Map as M
import Data.Maybe (fromMaybe)
import Data.Text (Text, unpack)
import System.FilePath (takeExtension)
import Text.HTML.TagSoup
import Text.Pandoc.Builder (Blocks, Inlines)
import qualified Text.Pandoc.Builder as B
import Text.Pandoc.Class (PandocMonad (..))
import Text.Pandoc.Definition
import Text.Pandoc.Logging
import Text.Pandoc.Options
import Text.Pandoc.Parsing
import Text.Pandoc.Readers.HTML (htmlTag)
import Text.Pandoc.Shared (crFilter, underlineSpan)
-- | Read Muse from an input string and return a Pandoc document.
readMuse :: PandocMonad m
=> ReaderOptions
-> Text
-> m Pandoc
readMuse opts s = do
res <- readWithM parseMuse def{ stateOptions = opts } (unpack (crFilter s))
case res of
Left e -> throwError e
Right d -> return d
type MuseParser = ParserT String ParserState
--
-- main parser
--
parseMuse :: PandocMonad m => MuseParser m Pandoc
parseMuse = do
many directive
blocks <- parseBlocks
st <- getState
let doc = runF (do Pandoc _ bs <- B.doc <$> blocks
meta <- stateMeta' st
return $ Pandoc meta bs) st
reportLogMessages
return doc
parseBlocks :: PandocMonad m => MuseParser m (F Blocks)
parseBlocks = do
res <- mconcat <$> many block
spaces
eof
return res
--
-- utility functions
--
eol :: Stream s m Char => ParserT s st m ()
eol = void newline <|> eof
htmlElement :: PandocMonad m => String -> MuseParser m (Attr, String)
htmlElement tag = try $ do
(TagOpen _ attr, _) <- htmlTag (~== TagOpen tag [])
content <- manyTill anyChar endtag
return (htmlAttrToPandoc attr, content)
where
endtag = void $ htmlTag (~== TagClose tag)
htmlAttrToPandoc :: [Attribute String] -> Attr
htmlAttrToPandoc attrs = (ident, classes, keyvals)
where
ident = fromMaybe "" $ lookup "id" attrs
classes = maybe [] words $ lookup "class" attrs
keyvals = [(k,v) | (k,v) <- attrs, k /= "id" && k /= "class"]
parseHtmlContentWithAttrs :: PandocMonad m
=> String -> MuseParser m a -> MuseParser m (Attr, [a])
parseHtmlContentWithAttrs tag parser = do
(attr, content) <- htmlElement tag
parsedContent <- parseContent (content ++ "\n")
return (attr, parsedContent)
where
parseContent = parseFromString $ manyTill parser endOfContent
endOfContent = try $ skipMany blankline >> skipSpaces >> eof
parseHtmlContent :: PandocMonad m => String -> MuseParser m a -> MuseParser m [a]
parseHtmlContent tag p = fmap snd (parseHtmlContentWithAttrs tag p)
commonPrefix :: String -> String -> String
commonPrefix _ [] = []
commonPrefix [] _ = []
commonPrefix (x:xs) (y:ys)
| x == y = x : commonPrefix xs ys
| otherwise = []
atStart :: PandocMonad m => MuseParser m a -> MuseParser m a
atStart p = do
pos <- getPosition
st <- getState
guard $ stateLastStrPos st /= Just pos
p
--
-- directive parsers
--
-- While not documented, Emacs Muse allows "-" in directive name
parseDirectiveKey :: PandocMonad m => MuseParser m String
parseDirectiveKey = do
char '#'
many (letter <|> char '-')
parseEmacsDirective :: PandocMonad m => MuseParser m (String, F Inlines)
parseEmacsDirective = do
key <- parseDirectiveKey
space
spaces
raw <- manyTill anyChar eol
value <- parseFromString (trimInlinesF . mconcat <$> many inline) raw
return (key, value)
parseAmuseDirective :: PandocMonad m => MuseParser m (String, F Inlines)
parseAmuseDirective = do
key <- parseDirectiveKey
space
spaces
first <- manyTill anyChar eol
rest <- manyTill anyLine endOfDirective
many blankline
value <- parseFromString (trimInlinesF . mconcat <$> many inline) $ unlines (first : rest)
return (key, value)
where
endOfDirective = lookAhead $ endOfInput <|> try (void blankline) <|> try (void parseDirectiveKey)
endOfInput = try $ skipMany blankline >> skipSpaces >> eof
directive :: PandocMonad m => MuseParser m ()
directive = do
ext <- getOption readerExtensions
(key, value) <- if extensionEnabled Ext_amuse ext then parseAmuseDirective else parseEmacsDirective
updateState $ \st -> st { stateMeta' = B.setMeta key <$> value <*> stateMeta' st }
--
-- block parsers
--
block :: PandocMonad m => MuseParser m (F Blocks)
block = do
res <- mempty <$ skipMany1 blankline
<|> blockElements
<|> para
skipMany blankline
trace (take 60 $ show $ B.toList $ runF res defaultParserState)
return res
blockElements :: PandocMonad m => MuseParser m (F Blocks)
blockElements = choice [ comment
, separator
, header
, example
, exampleTag
, literal
, centerTag
, rightTag
, quoteTag
, divTag
, verseTag
, lineBlock
, bulletList
, orderedList
, definitionList
, table
, commentTag
, amuseNoteBlock
, emacsNoteBlock
]
comment :: PandocMonad m => MuseParser m (F Blocks)
comment = try $ do
char ';'
optionMaybe (spaceChar >> (many $ noneOf "\n"))
eol
return mempty
separator :: PandocMonad m => MuseParser m (F Blocks)
separator = try $ do
string "----"
many $ char '-'
many spaceChar
eol
return $ return B.horizontalRule
header :: PandocMonad m => MuseParser m (F Blocks)
header = try $ do
st <- stateParserContext <$> getState
q <- stateQuoteContext <$> getState
getPosition >>= \pos -> guard (st == NullState && q == NoQuote && sourceColumn pos == 1)
level <- fmap length $ many1 $ char '*'
guard $ level <= 5
spaceChar
content <- trimInlinesF . mconcat <$> manyTill inline eol
attr <- registerHeader ("", [], []) (runF content defaultParserState)
return $ B.headerWith attr level <$> content
example :: PandocMonad m => MuseParser m (F Blocks)
example = try $ do
string "{{{"
optionMaybe blankline
contents <- manyTill anyChar $ try (optionMaybe blankline >> string "}}}")
return $ return $ B.codeBlock contents
-- Trim up to one newline from the beginning and the end,
-- in case opening and/or closing tags are on separate lines.
chop :: String -> String
chop = lchop . rchop
where lchop s = case s of
'\n':ss -> ss
_ -> s
rchop = reverse . lchop . reverse
exampleTag :: PandocMonad m => MuseParser m (F Blocks)
exampleTag = do
(attr, contents) <- htmlElement "example"
return $ return $ B.codeBlockWith attr $ chop contents
literal :: PandocMonad m => MuseParser m (F Blocks)
literal = do
guardDisabled Ext_amuse -- Text::Amuse does not support <literal>
(return . rawBlock) <$> htmlElement "literal"
where
-- FIXME: Emacs Muse inserts <literal> without style into all output formats, but we assume HTML
format (_, _, kvs) = fromMaybe "html" $ lookup "style" kvs
rawBlock (attrs, content) = B.rawBlock (format attrs) $ chop content
blockTag :: PandocMonad m
=> (Blocks -> Blocks)
-> String
-> MuseParser m (F Blocks)
blockTag f s = do
res <- parseHtmlContent s block
return $ f <$> mconcat res
-- <center> tag is ignored
centerTag :: PandocMonad m => MuseParser m (F Blocks)
centerTag = blockTag id "center"
-- <right> tag is ignored
rightTag :: PandocMonad m => MuseParser m (F Blocks)
rightTag = blockTag id "right"
quoteTag :: PandocMonad m => MuseParser m (F Blocks)
quoteTag = withQuoteContext InDoubleQuote $ blockTag B.blockQuote "quote"
-- <div> tag is supported by Emacs Muse, but not Amusewiki 2.025
divTag :: PandocMonad m => MuseParser m (F Blocks)
divTag = do
(attrs, content) <- parseHtmlContentWithAttrs "div" block
return $ B.divWith attrs <$> mconcat content
verseLine :: PandocMonad m => MuseParser m String
verseLine = do
line <- anyLine <|> many1Till anyChar eof
let (white, rest) = span (== ' ') line
return $ replicate (length white) '\160' ++ rest
verseLines :: PandocMonad m => MuseParser m (F Blocks)
verseLines = do
optionMaybe blankline -- Skip blankline after opening tag on separate line
lns <- many verseLine
lns' <- mapM (parseFromString' (trimInlinesF . mconcat <$> many inline)) lns
return $ B.lineBlock <$> sequence lns'
verseTag :: PandocMonad m => MuseParser m (F Blocks)
verseTag = do
(_, content) <- htmlElement "verse"
parseFromString verseLines content
commentTag :: PandocMonad m => MuseParser m (F Blocks)
commentTag = parseHtmlContent "comment" anyChar >> return mempty
-- Indented paragraph is either center, right or quote
para :: PandocMonad m => MuseParser m (F Blocks)
para = do
indent <- length <$> many spaceChar
st <- stateParserContext <$> getState
let f = if st /= ListItemState && indent >= 2 && indent < 6 then B.blockQuote else id
fmap (f . B.para) . trimInlinesF . mconcat <$> many1Till inline endOfParaElement
where
endOfParaElement = lookAhead $ endOfInput <|> endOfPara <|> newBlockElement
endOfInput = try $ skipMany blankline >> skipSpaces >> eof
endOfPara = try $ blankline >> skipMany1 blankline
newBlockElement = try $ blankline >> void blockElements
noteMarker :: PandocMonad m => MuseParser m String
noteMarker = try $ do
char '['
many1Till digit $ char ']'
-- Amusewiki version of note
-- Parsing is similar to list item, except that note marker is used instead of list marker
amuseNoteBlock :: PandocMonad m => MuseParser m (F Blocks)
amuseNoteBlock = try $ do
guardEnabled Ext_amuse
pos <- getPosition
ref <- noteMarker <* spaceChar
content <- listItemContents $ 3 + length ref
oldnotes <- stateNotes' <$> getState
case M.lookup ref oldnotes of
Just _ -> logMessage $ DuplicateNoteReference ref pos
Nothing -> return ()
updateState $ \s -> s{ stateNotes' = M.insert ref (pos, content) oldnotes }
return mempty
-- Emacs version of note
-- Notes are allowed only at the end of text, no indentation is required.
emacsNoteBlock :: PandocMonad m => MuseParser m (F Blocks)
emacsNoteBlock = try $ do
guardDisabled Ext_amuse
pos <- getPosition
ref <- noteMarker <* skipSpaces
content <- mconcat <$> blocksTillNote
oldnotes <- stateNotes' <$> getState
case M.lookup ref oldnotes of
Just _ -> logMessage $ DuplicateNoteReference ref pos
Nothing -> return ()
updateState $ \s -> s{ stateNotes' = M.insert ref (pos, content) oldnotes }
return mempty
where
blocksTillNote =
many1Till block (eof <|> () <$ lookAhead noteMarker)
--
-- Verse markup
--
lineVerseLine :: PandocMonad m => MuseParser m String
lineVerseLine = try $ do
char '>'
white <- many1 (char ' ' >> pure '\160')
rest <- anyLine
return $ tail white ++ rest
blanklineVerseLine :: PandocMonad m => MuseParser m Char
blanklineVerseLine = try $ char '>' >> blankline
lineBlock :: PandocMonad m => MuseParser m (F Blocks)
lineBlock = try $ do
lns <- many1 (pure <$> blanklineVerseLine <|> lineVerseLine)
lns' <- mapM (parseFromString' (trimInlinesF . mconcat <$> many inline)) lns
return $ B.lineBlock <$> sequence lns'
--
-- lists
--
listLine :: PandocMonad m => Int -> MuseParser m String
listLine markerLength = try $ do
indentWith markerLength
manyTill anyChar eol
withListContext :: PandocMonad m => MuseParser m a -> MuseParser m a
withListContext p = do
state <- getState
let oldContext = stateParserContext state
setState $ state { stateParserContext = ListItemState }
parsed <- p
updateState (\st -> st {stateParserContext = oldContext})
return parsed
listContinuation :: PandocMonad m => Int -> MuseParser m [String]
listContinuation markerLength = try $ do
result <- many1 $ listLine markerLength
blank <- option id ((++ [""]) <$ blankline)
return $ blank result
listStart :: PandocMonad m => MuseParser m Int -> MuseParser m Int
listStart marker = try $ do
preWhitespace <- length <$> many spaceChar
st <- stateParserContext <$> getState
getPosition >>= \pos -> guard (st == ListItemState || sourceColumn pos /= 1)
markerLength <- marker
void spaceChar <|> eol
return $ preWhitespace + markerLength + 1
dropSpacePrefix :: [String] -> [String]
dropSpacePrefix lns =
map (drop maxIndent) lns
where flns = filter (not . all (== ' ')) lns
maxIndent = if null flns then 0 else length $ takeWhile (== ' ') $ foldl1 commonPrefix flns
listItemContents :: PandocMonad m => Int -> MuseParser m (F Blocks)
listItemContents markerLength = do
firstLine <- manyTill anyChar eol
restLines <- many $ listLine markerLength
blank <- option id ((++ [""]) <$ blankline)
let first = firstLine : blank restLines
rest <- many $ listContinuation markerLength
let allLines = concat (first : rest)
parseFromString (withListContext parseBlocks) $ unlines (dropSpacePrefix allLines)
listItem :: PandocMonad m => MuseParser m Int -> MuseParser m (F Blocks)
listItem start = try $ do
markerLength <- start
listItemContents markerLength
bulletListItems :: PandocMonad m => MuseParser m (F [Blocks])
bulletListItems = sequence <$> many1 (listItem bulletListStart)
bulletListStart :: PandocMonad m => MuseParser m Int
bulletListStart = listStart (char '-' >> return 1)
bulletList :: PandocMonad m => MuseParser m (F Blocks)
bulletList = do
listItems <- bulletListItems
return $ B.bulletList <$> listItems
orderedListStart :: PandocMonad m
=> ListNumberStyle
-> ListNumberDelim
-> MuseParser m Int
orderedListStart style delim = listStart (snd <$> withHorizDisplacement (orderedListMarker style delim))
orderedList :: PandocMonad m => MuseParser m (F Blocks)
orderedList = try $ do
p@(_, style, delim) <- lookAhead (many spaceChar *> anyOrderedListMarker <* (eol <|> void spaceChar))
guard $ style `elem` [Decimal, LowerAlpha, UpperAlpha, LowerRoman, UpperRoman]
guard $ delim == Period
items <- sequence <$> many1 (listItem $ orderedListStart style delim)
return $ B.orderedListWith p <$> items
definitionListItem :: PandocMonad m => MuseParser m (F (Inlines, [Blocks]))
definitionListItem = try $ do
rawTerm <- termParser
term <- parseFromString (trimInlinesF . mconcat <$> many inline) rawTerm
many1 spaceChar
string "::"
firstLine <- manyTill anyChar eol
restLines <- manyTill anyLine endOfListItemElement
let lns = dropWhile (== ' ') firstLine : dropSpacePrefix restLines
lineContent <- parseFromString (withListContext parseBlocks) $ unlines lns
pure $ do lineContent' <- lineContent
term' <- term
pure (term', [lineContent'])
where
termParser = (guardDisabled Ext_amuse <|> void spaceChar) >> -- Initial space is required by Amusewiki, but not Emacs Muse
many spaceChar >>
many1Till (noneOf "\n") (lookAhead (void (try (spaceChar >> string "::"))))
endOfInput = lookAhead $ try $ skipMany blankline >> skipSpaces >> eof
twoBlankLines = try $ blankline >> skipMany1 blankline
newDefinitionListItem = try $ void termParser
endOfListItemElement = lookAhead $ endOfInput <|> newDefinitionListItem <|> twoBlankLines
definitionListItems :: PandocMonad m => MuseParser m (F [(Inlines, [Blocks])])
definitionListItems = sequence <$> many1 definitionListItem
definitionList :: PandocMonad m => MuseParser m (F Blocks)
definitionList = do
listItems <- definitionListItems
return $ B.definitionList <$> listItems
--
-- tables
--
data MuseTable = MuseTable
{ museTableCaption :: Inlines
, museTableHeaders :: [[Blocks]]
, museTableRows :: [[Blocks]]
, museTableFooters :: [[Blocks]]
}
data MuseTableElement = MuseHeaderRow (F [Blocks])
| MuseBodyRow (F [Blocks])
| MuseFooterRow (F [Blocks])
| MuseCaption (F Inlines)
museToPandocTable :: MuseTable -> Blocks
museToPandocTable (MuseTable caption headers body footers) =
B.table caption attrs headRow rows
where ncol = maximum (0 : map length (headers ++ body ++ footers))
attrs = replicate ncol (AlignDefault, 0.0)
headRow = if null headers then [] else head headers
rows = (if null headers then [] else tail headers) ++ body ++ footers
museAppendElement :: MuseTable
-> MuseTableElement
-> F MuseTable
museAppendElement tbl element =
case element of
MuseHeaderRow row -> do
row' <- row
return tbl{ museTableHeaders = museTableHeaders tbl ++ [row'] }
MuseBodyRow row -> do
row' <- row
return tbl{ museTableRows = museTableRows tbl ++ [row'] }
MuseFooterRow row-> do
row' <- row
return tbl{ museTableFooters = museTableFooters tbl ++ [row'] }
MuseCaption inlines -> do
inlines' <- inlines
return tbl{ museTableCaption = inlines' }
tableCell :: PandocMonad m => MuseParser m (F Blocks)
tableCell = try $ fmap B.plain . trimInlinesF . mconcat <$> manyTill inline (lookAhead cellEnd)
where cellEnd = try $ void (many1 spaceChar >> char '|') <|> eol
tableElements :: PandocMonad m => MuseParser m [MuseTableElement]
tableElements = tableParseElement `sepEndBy1` eol
elementsToTable :: [MuseTableElement] -> F MuseTable
elementsToTable = foldM museAppendElement emptyTable
where emptyTable = MuseTable mempty mempty mempty mempty
table :: PandocMonad m => MuseParser m (F Blocks)
table = try $ do
rows <- tableElements
let tbl = elementsToTable rows
let pandocTbl = museToPandocTable <$> tbl :: F Blocks
return pandocTbl
tableParseElement :: PandocMonad m => MuseParser m MuseTableElement
tableParseElement = tableParseHeader
<|> tableParseBody
<|> tableParseFooter
<|> tableParseCaption
tableParseRow :: PandocMonad m => Int -> MuseParser m (F [Blocks])
tableParseRow n = try $ do
fields <- tableCell `sepBy2` fieldSep
return $ sequence fields
where p `sepBy2` sep = (:) <$> p <*> many1 (sep >> p)
fieldSep = many1 spaceChar >> count n (char '|') >> (void (many1 spaceChar) <|> void (lookAhead newline))
tableParseHeader :: PandocMonad m => MuseParser m MuseTableElement
tableParseHeader = MuseHeaderRow <$> tableParseRow 2
tableParseBody :: PandocMonad m => MuseParser m MuseTableElement
tableParseBody = MuseBodyRow <$> tableParseRow 1
tableParseFooter :: PandocMonad m => MuseParser m MuseTableElement
tableParseFooter = MuseFooterRow <$> tableParseRow 3
tableParseCaption :: PandocMonad m => MuseParser m MuseTableElement
tableParseCaption = try $ do
many spaceChar
string "|+"
contents <- trimInlinesF . mconcat <$> many1Till inline (lookAhead $ string "+|")
string "+|"
return $ MuseCaption contents
--
-- inline parsers
--
inlineList :: PandocMonad m => [MuseParser m (F Inlines)]
inlineList = [ endline
, br
, anchor
, footnote
, strong
, strongTag
, emph
, emphTag
, underlined
, superscriptTag
, subscriptTag
, strikeoutTag
, verbatimTag
, nbsp
, link
, code
, codeTag
, inlineLiteralTag
, whitespace
, str
, symbol
]
inline :: PandocMonad m => MuseParser m (F Inlines)
inline = choice inlineList <?> "inline"
endline :: PandocMonad m => MuseParser m (F Inlines)
endline = try $ do
newline
notFollowedBy blankline
returnF B.softbreak
anchor :: PandocMonad m => MuseParser m (F Inlines)
anchor = try $ do
getPosition >>= \pos -> guard (sourceColumn pos == 1)
char '#'
first <- letter
rest <- many (letter <|> digit)
skipMany spaceChar <|> void newline
let anchorId = first:rest
return $ return $ B.spanWith (anchorId, [], []) mempty
footnote :: PandocMonad m => MuseParser m (F Inlines)
footnote = try $ do
ref <- noteMarker
return $ do
notes <- asksF stateNotes'
case M.lookup ref notes of
Nothing -> return $ B.str $ "[" ++ ref ++ "]"
Just (_pos, contents) -> do
st <- askF
let contents' = runF contents st { stateNotes' = M.empty }
return $ B.note contents'
whitespace :: PandocMonad m => MuseParser m (F Inlines)
whitespace = fmap return (lb <|> regsp)
where lb = try $ skipMany spaceChar >> linebreak >> return B.space
regsp = try $ skipMany1 spaceChar >> return B.space
br :: PandocMonad m => MuseParser m (F Inlines)
br = try $ do
string "<br>"
return $ return B.linebreak
linebreak :: PandocMonad m => MuseParser m (F Inlines)
linebreak = newline >> notFollowedBy newline >> (lastNewline <|> innerNewline)
where lastNewline = do
eof
return $ return mempty
innerNewline = return $ return B.space
emphasisBetween :: (PandocMonad m, Show a) => MuseParser m a -> MuseParser m (F Inlines)
emphasisBetween c = try $ enclosedInlines c c
enclosedInlines :: (PandocMonad m, Show a, Show b)
=> MuseParser m a
-> MuseParser m b
-> MuseParser m (F Inlines)
enclosedInlines start end = try $
trimInlinesF . mconcat <$> (enclosed (atStart start) end inline <* notFollowedBy (satisfy isLetter))
inlineTag :: PandocMonad m
=> (Inlines -> Inlines)
-> String
-> MuseParser m (F Inlines)
inlineTag f s = try $ do
res <- parseHtmlContent s inline
return $ f <$> mconcat res
strongTag :: PandocMonad m => MuseParser m (F Inlines)
strongTag = inlineTag B.strong "strong"
strong :: PandocMonad m => MuseParser m (F Inlines)
strong = fmap B.strong <$> emphasisBetween (string "**")
emph :: PandocMonad m => MuseParser m (F Inlines)
emph = fmap B.emph <$> emphasisBetween (char '*')
underlined :: PandocMonad m => MuseParser m (F Inlines)
underlined = do
guardDisabled Ext_amuse -- Supported only by Emacs Muse
fmap underlineSpan <$> emphasisBetween (char '_')
emphTag :: PandocMonad m => MuseParser m (F Inlines)
emphTag = inlineTag B.emph "em"
superscriptTag :: PandocMonad m => MuseParser m (F Inlines)
superscriptTag = inlineTag B.superscript "sup"
subscriptTag :: PandocMonad m => MuseParser m (F Inlines)
subscriptTag = inlineTag B.subscript "sub"
strikeoutTag :: PandocMonad m => MuseParser m (F Inlines)
strikeoutTag = inlineTag B.strikeout "del"
verbatimTag :: PandocMonad m => MuseParser m (F Inlines)
verbatimTag = do
content <- parseHtmlContent "verbatim" anyChar
return $ return $ B.text content
nbsp :: PandocMonad m => MuseParser m (F Inlines)
nbsp = do
guardDisabled Ext_amuse -- Supported only by Emacs Muse
string "~~"
return $ return $ B.str "\160"
code :: PandocMonad m => MuseParser m (F Inlines)
code = try $ do
pos <- getPosition
sp <- if sourceColumn pos == 1
then pure mempty
else skipMany1 spaceChar >> pure B.space
char '='
contents <- many1Till (noneOf "\n\r" <|> (newline <* notFollowedBy newline)) $ char '='
guard $ not $ null contents
guard $ head contents `notElem` " \t\n"
guard $ last contents `notElem` " \t\n"
notFollowedBy $ satisfy isLetter
return $ return (sp B.<> B.code contents)
codeTag :: PandocMonad m => MuseParser m (F Inlines)
codeTag = do
(attrs, content) <- parseHtmlContentWithAttrs "code" anyChar
return $ return $ B.codeWith attrs content
inlineLiteralTag :: PandocMonad m => MuseParser m (F Inlines)
inlineLiteralTag = do
guardDisabled Ext_amuse -- Text::Amuse does not support <literal>
(attrs, content) <- parseHtmlContentWithAttrs "literal" anyChar
return $ return $ rawInline (attrs, content)
where
-- FIXME: Emacs Muse inserts <literal> without style into all output formats, but we assume HTML
format (_, _, kvs) = fromMaybe "html" $ lookup "style" kvs
rawInline (attrs, content) = B.rawInline (format attrs) content
str :: PandocMonad m => MuseParser m (F Inlines)
str = do
result <- many1 alphaNum
updateLastStrPos
return $ return $ B.str result
symbol :: PandocMonad m => MuseParser m (F Inlines)
symbol = return . B.str <$> count 1 nonspaceChar
link :: PandocMonad m => MuseParser m (F Inlines)
link = try $ do
st <- getState
guard $ stateAllowLinks st
setState $ st{ stateAllowLinks = False }
(url, title, content) <- linkText
setState $ st{ stateAllowLinks = True }
return $ case stripPrefix "URL:" url of
Nothing -> if isImageUrl url
then B.image url title <$> fromMaybe (return mempty) content
else B.link url title <$> fromMaybe (return $ B.str url) content
Just url' -> B.link url' title <$> fromMaybe (return $ B.str url') content
where -- Taken from muse-image-regexp defined in Emacs Muse file lisp/muse-regexps.el
imageExtensions = [".eps", ".gif", ".jpg", ".jpeg", ".pbm", ".png", ".tiff", ".xbm", ".xpm"]
isImageUrl = (`elem` imageExtensions) . takeExtension
linkContent :: PandocMonad m => MuseParser m (F Inlines)
linkContent = do
char '['
res <- many1Till anyChar $ char ']'
parseFromString (mconcat <$> many1 inline) res
linkText :: PandocMonad m => MuseParser m (String, String, Maybe (F Inlines))
linkText = do
string "[["
url <- many1Till anyChar $ char ']'
content <- optionMaybe linkContent
char ']'
return (url, "", content)
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