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authorAlbert Krewinkel <albert@zeitkraut.de>2016-05-22 16:52:06 +0200
committerAlbert Krewinkel <albert@zeitkraut.de>2016-05-25 22:54:45 +0200
commit39e8b4276e6d88d5cbb943d04c866dde9bf6473c (patch)
treef20d8b1e508c39524fe7084c50172861df4afad4
parenta340c7249f8e19d36ee4a68663b4c97e0893292b (diff)
Org reader: extract inline parser to module
Inline parsing code is moved to a separate module. Parsers for block starts are extracted as well, as those are used in the `endline` parser. This is part of the Org-mode reader cleanup effort.
-rw-r--r--pandoc.cabal2
-rw-r--r--src/Text/Pandoc/Readers/Org.hs797
-rw-r--r--src/Text/Pandoc/Readers/Org/BlockStarts.hs112
-rw-r--r--src/Text/Pandoc/Readers/Org/Inlines.hs715
-rw-r--r--src/Text/Pandoc/Readers/Org/Parsing.hs19
5 files changed, 889 insertions, 756 deletions
diff --git a/pandoc.cabal b/pandoc.cabal
index 61b5043ba..7286bd890 100644
--- a/pandoc.cabal
+++ b/pandoc.cabal
@@ -393,6 +393,8 @@ Library
Text.Pandoc.Readers.Odt.Generic.XMLConverter,
Text.Pandoc.Readers.Odt.Arrows.State,
Text.Pandoc.Readers.Odt.Arrows.Utils,
+ Text.Pandoc.Readers.Org.BlockStarts,
+ Text.Pandoc.Readers.Org.Inlines,
Text.Pandoc.Readers.Org.ParserState,
Text.Pandoc.Readers.Org.Parsing,
Text.Pandoc.Writers.Shared,
diff --git a/src/Text/Pandoc/Readers/Org.hs b/src/Text/Pandoc/Readers/Org.hs
index fd811c078..605d2220e 100644
--- a/src/Text/Pandoc/Readers/Org.hs
+++ b/src/Text/Pandoc/Readers/Org.hs
@@ -1,5 +1,4 @@
{-# LANGUAGE FlexibleContexts #-}
-{-# LANGUAGE OverloadedStrings #-}
{-
Copyright (C) 2014-2016 Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
@@ -29,6 +28,8 @@ Conversion of org-mode formatted plain text to 'Pandoc' document.
-}
module Text.Pandoc.Readers.Org ( readOrg ) where
+import Text.Pandoc.Readers.Org.BlockStarts
+import Text.Pandoc.Readers.Org.Inlines
import Text.Pandoc.Readers.Org.ParserState
import Text.Pandoc.Readers.Org.Parsing
@@ -38,19 +39,16 @@ import Text.Pandoc.Definition
import Text.Pandoc.Compat.Monoid ((<>))
import Text.Pandoc.Error
import Text.Pandoc.Options
-import Text.Pandoc.Readers.LaTeX (inlineCommand, rawLaTeXInline)
-import Text.Pandoc.Shared (compactify', compactify'DL)
-import Text.TeXMath (readTeX, writePandoc, DisplayType(..))
-import qualified Text.TeXMath.Readers.MathML.EntityMap as MathMLEntityMap
+import Text.Pandoc.Shared ( compactify', compactify'DL )
-import Control.Arrow (first)
-import Control.Monad (foldM, guard, mplus, mzero, when)
+import Control.Arrow ( first )
+import Control.Monad ( foldM, guard, mzero )
import Control.Monad.Reader ( runReader )
-import Data.Char (isAlphaNum, isSpace, toLower, toUpper)
-import Data.List ( foldl', intersperse, isPrefixOf, isSuffixOf )
+import Data.Char ( toLower, toUpper)
+import Data.List ( foldl', intersperse, isPrefixOf )
import qualified Data.Map as M
import Data.Maybe ( fromMaybe, isNothing )
-import Network.HTTP (urlEncode)
+import Network.HTTP ( urlEncode )
-- | Parse org-mode string and return a Pandoc document.
@@ -60,54 +58,6 @@ readOrg :: ReaderOptions -- ^ Reader options
readOrg opts s = flip runReader def $ readWithM parseOrg def{ orgStateOptions = opts } (s ++ "\n\n")
--
--- Functions acting on the parser state
---
-recordAnchorId :: String -> OrgParser ()
-recordAnchorId i = updateState $ \s ->
- s{ orgStateAnchorIds = i : (orgStateAnchorIds s) }
-
-pushToInlineCharStack :: Char -> OrgParser ()
-pushToInlineCharStack c = updateState $ \s ->
- s{ orgStateEmphasisCharStack = c:orgStateEmphasisCharStack s }
-
-popInlineCharStack :: OrgParser ()
-popInlineCharStack = updateState $ \s ->
- s{ orgStateEmphasisCharStack = drop 1 . orgStateEmphasisCharStack $ s }
-
-surroundingEmphasisChar :: OrgParser [Char]
-surroundingEmphasisChar =
- take 1 . drop 1 . orgStateEmphasisCharStack <$> getState
-
-startEmphasisNewlinesCounting :: Int -> OrgParser ()
-startEmphasisNewlinesCounting maxNewlines = updateState $ \s ->
- s{ orgStateEmphasisNewlines = Just maxNewlines }
-
-decEmphasisNewlinesCount :: OrgParser ()
-decEmphasisNewlinesCount = updateState $ \s ->
- s{ orgStateEmphasisNewlines = (\n -> n - 1) <$> orgStateEmphasisNewlines s }
-
-newlinesCountWithinLimits :: OrgParser Bool
-newlinesCountWithinLimits = do
- st <- getState
- return $ ((< 0) <$> orgStateEmphasisNewlines st) /= Just True
-
-resetEmphasisNewlines :: OrgParser ()
-resetEmphasisNewlines = updateState $ \s ->
- s{ orgStateEmphasisNewlines = Nothing }
-
-addLinkFormat :: String
- -> (String -> String)
- -> OrgParser ()
-addLinkFormat key formatter = updateState $ \s ->
- let fs = orgStateLinkFormatters s
- in s{ orgStateLinkFormatters = M.insert key formatter fs }
-
-addToNotesTable :: OrgNoteRecord -> OrgParser ()
-addToNotesTable note = do
- oldnotes <- orgStateNotes' <$> getState
- updateState $ \s -> s{ orgStateNotes' = note:oldnotes }
-
---
-- Export Settings
--
exportSetting :: OrgParser ()
@@ -259,7 +209,7 @@ block = choice [ mempty <$ blanklines
, genericDrawer
, specialLine
, header
- , return <$> hline
+ , horizontalRule
, list
, latexFragment
, noteBlock
@@ -457,9 +407,6 @@ indentWith num = do
type SwitchOption = (Char, Maybe String)
-orgArgWord :: OrgParser String
-orgArgWord = many1 orgArgWordChar
-
-- | Parse code block arguments
-- TODO: We currently don't handle switches.
codeHeaderArgs :: OrgParser ([String], [(String, String)])
@@ -474,7 +421,10 @@ codeHeaderArgs = try $ do
, map toRundocAttrib (("language", language) : parameters)
)
else ([ pandocLang ], parameters)
- where hasRundocParameters = not . null
+ where
+ hasRundocParameters = not . null
+ toRundocAttrib = first ("rundoc-" ++)
+
switch :: OrgParser SwitchOption
switch = try $ simpleSwitch <|> lineNumbersSwitch
@@ -508,17 +458,6 @@ blockOption = try $ do
paramValue <- option "yes" orgParamValue
return (argKey, paramValue)
-inlineBlockOption :: OrgParser (String, String)
-inlineBlockOption = try $ do
- argKey <- orgArgKey
- paramValue <- option "yes" orgInlineParamValue
- return (argKey, paramValue)
-
-orgArgKey :: OrgParser String
-orgArgKey = try $
- skipSpaces *> char ':'
- *> many1 orgArgWordChar
-
orgParamValue :: OrgParser String
orgParamValue = try $
skipSpaces
@@ -526,19 +465,6 @@ orgParamValue = try $
*> many1 (noneOf "\t\n\r ")
<* skipSpaces
-orgInlineParamValue :: OrgParser String
-orgInlineParamValue = try $
- skipSpaces
- *> notFollowedBy (char ':')
- *> many1 (noneOf "\t\n\r ]")
- <* skipSpaces
-
-orgArgWordChar :: OrgParser Char
-orgArgWordChar = alphaNum <|> oneOf "-_"
-
-toRundocAttrib :: (String, String) -> (String, String)
-toRundocAttrib = first ("rundoc-" ++)
-
commaEscaped :: String -> String
commaEscaped (',':cs@('*':_)) = cs
commaEscaped (',':cs@('#':'+':_)) = cs
@@ -552,7 +478,10 @@ exampleCode :: String -> Blocks
exampleCode = B.codeBlockWith ("", ["example"], [])
exampleLine :: OrgParser String
-exampleLine = try $ skipSpaces *> string ": " *> anyLine
+exampleLine = try $ exampleLineStart *> anyLine
+
+horizontalRule :: OrgParser (F Blocks)
+horizontalRule = return B.horizontalRule <$ try hline
--
@@ -582,11 +511,6 @@ genericDrawer = try $ do
drawerDiv :: String -> F Blocks -> F Blocks
drawerDiv drawerName = fmap $ B.divWith (mempty, [drawerName, "drawer"], mempty)
-drawerStart :: OrgParser String
-drawerStart = try $
- skipSpaces *> drawerName <* skipSpaces <* newline
- where drawerName = char ':' *> manyTill nonspaceChar (char ':')
-
drawerLine :: OrgParser String
drawerLine = anyLine
@@ -639,31 +563,38 @@ figure = try $ do
let attr = (mempty, mempty, figKeyVals)
return $ (B.para . B.imageWith attr src (withFigPrefix figName) <$> figCaption)
where
+ withFigPrefix :: String -> String
withFigPrefix cs =
if "fig:" `isPrefixOf` cs
then cs
else "fig:" ++ cs
+ selfTarget :: OrgParser String
+ selfTarget = try $ char '[' *> linkTarget <* char ']'
+
+
--
-- Comments, Options and Metadata
--
+
+addLinkFormat :: String
+ -> (String -> String)
+ -> OrgParser ()
+addLinkFormat key formatter = updateState $ \s ->
+ let fs = orgStateLinkFormatters s
+ in s{ orgStateLinkFormatters = M.insert key formatter fs }
+
specialLine :: OrgParser (F Blocks)
specialLine = fmap return . try $ metaLine <|> commentLine
-metaLine :: OrgParser Blocks
-metaLine = mempty <$ metaLineStart <* (optionLine <|> declarationLine)
-
-- The order, in which blocks are tried, makes sure that we're not looking at
-- the beginning of a block, so we don't need to check for it
-metaLineStart :: OrgParser ()
-metaLineStart = try $ skipSpaces <* string "#+"
+metaLine :: OrgParser Blocks
+metaLine = mempty <$ metaLineStart <* (optionLine <|> declarationLine)
commentLine :: OrgParser Blocks
commentLine = commentLineStart *> anyLine *> pure mempty
-commentLineStart :: OrgParser ()
-commentLineStart = try $ skipSpaces <* string "# "
-
declarationLine :: OrgParser ()
declarationLine = try $ do
key <- metaKey
@@ -741,23 +672,6 @@ header = try $ do
*> many1 tag
<* skipSpaces
-headerStart :: OrgParser Int
-headerStart = try $
- (length <$> many1 (char '*')) <* many1 (char ' ') <* updateLastPreCharPos
-
-
--- Don't use (or need) the reader wrapper here, we want hline to be
--- @show@able. Otherwise we can't use it with @notFollowedBy'@.
-
--- | Horizontal Line (five -- dashes or more)
-hline :: OrgParser Blocks
-hline = try $ do
- skipSpaces
- string "-----"
- many (char '-')
- skipSpaces
- newline
- return B.horizontalRule
--
-- Tables
@@ -793,9 +707,6 @@ orgToPandocTable :: OrgTable
orgToPandocTable (OrgTable aligns heads lns) caption =
B.table caption (zip aligns $ repeat 0) heads lns
-tableStart :: OrgParser Char
-tableStart = try $ skipSpaces *> char '|'
-
tableRows :: OrgParser [OrgTableRow]
tableRows = try $ many (tableAlignRow <|> tableHline <|> tableContentRow)
@@ -899,25 +810,12 @@ latexFragment = try $ do
, "\\end{", e, "}\n"
]
-latexEnvStart :: OrgParser String
-latexEnvStart = try $ do
- skipSpaces *> string "\\begin{"
- *> latexEnvName
- <* string "}"
- <* blankline
-
latexEnd :: String -> OrgParser ()
latexEnd envName = try $
() <$ skipSpaces
<* string ("\\end{" ++ envName ++ "}")
<* blankline
--- | Parses a LaTeX environment name.
-latexEnvName :: OrgParser String
-latexEnvName = try $ do
- mappend <$> many1 alphaNum
- <*> option "" (string "*")
-
--
-- Footnote defintions
@@ -942,7 +840,7 @@ paraOrPlain = try $ do
-- is directly followed by a list item, in which case the block is read as
-- plain text.
try (guard nl
- *> notFollowedBy (inList *> (orderedListStart <|> bulletListStart))
+ *> notFollowedBy (inList *> (() <$ orderedListStart <|> bulletListStart))
*> return (B.para <$> ils))
<|> (return (B.plain <$> ils))
@@ -971,38 +869,21 @@ orderedList :: OrgParser (F Blocks)
orderedList = fmap B.orderedList . fmap compactify' . sequence
<$> many1 (listItem orderedListStart)
-genericListStart :: OrgParser String
- -> OrgParser Int
-genericListStart listMarker = try $
- (+) <$> (length <$> many spaceChar)
- <*> (length <$> listMarker <* many1 spaceChar)
-
--- parses bullet list marker. maybe we know the indent level
-bulletListStart :: OrgParser Int
-bulletListStart = bulletListStart' Nothing
-
bulletListStart' :: Maybe Int -> OrgParser Int
-- returns length of bulletList prefix, inclusive of marker
bulletListStart' Nothing = do ind <- length <$> many spaceChar
- when (ind == 0) $ notFollowedBy (char '*')
- oneOf bullets
- many1 spaceChar
+ oneOf (bullets $ ind == 0)
+ skipSpaces1
return (ind + 1)
- -- Unindented lists are legal, but they can't use '*' bullets
- -- We return n to maintain compatibility with the generic listItem
bulletListStart' (Just n) = do count (n-1) spaceChar
- when (n == 1) $ notFollowedBy (char '*')
- oneOf bullets
+ oneOf (bullets $ n == 1)
many1 spaceChar
return n
-bullets :: String
-bullets = "*+-"
-
-orderedListStart :: OrgParser Int
-orderedListStart = genericListStart orderedListMarker
- -- Ordered list markers allowed in org-mode
- where orderedListMarker = mappend <$> many1 digit <*> (pure <$> oneOf ".)")
+-- Unindented lists are legal, but they can't use '*' bullets.
+-- We return n to maintain compatibility with the generic listItem.
+bullets :: Bool -> String
+bullets unindented = if unindented then "+-" else "*+-"
definitionListItem :: OrgParser Int
-> OrgParser (F (Inlines, [Blocks]))
@@ -1040,602 +921,6 @@ listContinuation markerLength = try $
<*> many blankline)
where listLine = try $ indentWith markerLength *> anyLineNewline
+-- | Parse any line, include the final newline in the output.
anyLineNewline :: OrgParser String
anyLineNewline = (++ "\n") <$> anyLine
-
-
---
--- inline
---
-
-inline :: OrgParser (F Inlines)
-inline =
- choice [ whitespace
- , linebreak
- , cite
- , footnote
- , linkOrImage
- , anchor
- , inlineCodeBlock
- , str
- , endline
- , emph
- , strong
- , strikeout
- , underline
- , code
- , math
- , displayMath
- , verbatim
- , subscript
- , superscript
- , inlineLaTeX
- , smart
- , symbol
- ] <* (guard =<< newlinesCountWithinLimits)
- <?> "inline"
-
-parseInlines :: OrgParser (F Inlines)
-parseInlines = trimInlinesF . mconcat <$> many1 inline
-
--- treat these as potentially non-text when parsing inline:
-specialChars :: [Char]
-specialChars = "\"$'()*+-,./:<=>[\\]^_{|}~"
-
-
-whitespace :: OrgParser (F Inlines)
-whitespace = pure B.space <$ skipMany1 spaceChar
- <* updateLastPreCharPos
- <* updateLastForbiddenCharPos
- <?> "whitespace"
-
-linebreak :: OrgParser (F Inlines)
-linebreak = try $ pure B.linebreak <$ string "\\\\" <* skipSpaces <* newline
-
-str :: OrgParser (F Inlines)
-str = return . B.str <$> many1 (noneOf $ specialChars ++ "\n\r ")
- <* updateLastStrPos
-
--- | An endline character that can be treated as a space, not a structural
--- break. This should reflect the values of the Emacs variable
--- @org-element-pagaraph-separate@.
-endline :: OrgParser (F Inlines)
-endline = try $ do
- newline
- notFollowedBy blankline
- notFollowedBy' exampleLine
- notFollowedBy' hline
- notFollowedBy' noteMarker
- notFollowedBy' tableStart
- notFollowedBy' drawerStart
- notFollowedBy' headerStart
- notFollowedBy' metaLineStart
- notFollowedBy' latexEnvStart
- notFollowedBy' commentLineStart
- notFollowedBy' bulletListStart
- notFollowedBy' orderedListStart
- decEmphasisNewlinesCount
- guard =<< newlinesCountWithinLimits
- updateLastPreCharPos
- return . return $ B.softbreak
-
-cite :: OrgParser (F Inlines)
-cite = try $ do
- guardEnabled Ext_citations
- (cs, raw) <- withRaw normalCite
- return $ (flip B.cite (B.text raw)) <$> cs
-
-normalCite :: OrgParser (F [Citation])
-normalCite = try $ char '['
- *> skipSpaces
- *> citeList
- <* skipSpaces
- <* char ']'
-
-citeList :: OrgParser (F [Citation])
-citeList = sequence <$> sepBy1 citation (try $ char ';' *> skipSpaces)
-
-citation :: OrgParser (F Citation)
-citation = try $ do
- pref <- prefix
- (suppress_author, key) <- citeKey
- suff <- suffix
- return $ do
- x <- pref
- y <- suff
- return $ Citation{ citationId = key
- , citationPrefix = B.toList x
- , citationSuffix = B.toList y
- , citationMode = if suppress_author
- then SuppressAuthor
- else NormalCitation
- , citationNoteNum = 0
- , citationHash = 0
- }
- where
- prefix = trimInlinesF . mconcat <$>
- manyTill inline (char ']' <|> (']' <$ lookAhead citeKey))
- suffix = try $ do
- hasSpace <- option False (notFollowedBy nonspaceChar >> return True)
- skipSpaces
- rest <- trimInlinesF . mconcat <$>
- many (notFollowedBy (oneOf ";]") *> inline)
- return $ if hasSpace
- then (B.space <>) <$> rest
- else rest
-
-footnote :: OrgParser (F Inlines)
-footnote = try $ inlineNote <|> referencedNote
-
-inlineNote :: OrgParser (F Inlines)
-inlineNote = try $ do
- string "[fn:"
- ref <- many alphaNum
- char ':'
- note <- fmap B.para . trimInlinesF . mconcat <$> many1Till inline (char ']')
- when (not $ null ref) $
- addToNotesTable ("fn:" ++ ref, note)
- return $ B.note <$> note
-
-referencedNote :: OrgParser (F Inlines)
-referencedNote = try $ do
- ref <- noteMarker
- return $ do
- notes <- asksF orgStateNotes'
- case lookup ref notes of
- Nothing -> return $ B.str $ "[" ++ ref ++ "]"
- Just contents -> do
- st <- askF
- let contents' = runF contents st{ orgStateNotes' = [] }
- return $ B.note contents'
-
-noteMarker :: OrgParser String
-noteMarker = try $ do
- char '['
- choice [ many1Till digit (char ']')
- , (++) <$> string "fn:"
- <*> many1Till (noneOf "\n\r\t ") (char ']')
- ]
-
-linkOrImage :: OrgParser (F Inlines)
-linkOrImage = explicitOrImageLink
- <|> selflinkOrImage
- <|> angleLink
- <|> plainLink
- <?> "link or image"
-
-explicitOrImageLink :: OrgParser (F Inlines)
-explicitOrImageLink = try $ do
- char '['
- srcF <- applyCustomLinkFormat =<< possiblyEmptyLinkTarget
- title <- enclosedRaw (char '[') (char ']')
- title' <- parseFromString (mconcat <$> many inline) title
- char ']'
- return $ do
- src <- srcF
- if isImageFilename title
- then pure $ B.link src "" $ B.image title mempty mempty
- else linkToInlinesF src =<< title'
-
-selflinkOrImage :: OrgParser (F Inlines)
-selflinkOrImage = try $ do
- src <- char '[' *> linkTarget <* char ']'
- return $ linkToInlinesF src (B.str src)
-
-plainLink :: OrgParser (F Inlines)
-plainLink = try $ do
- (orig, src) <- uri
- returnF $ B.link src "" (B.str orig)
-
-angleLink :: OrgParser (F Inlines)
-angleLink = try $ do
- char '<'
- link <- plainLink
- char '>'
- return link
-
-selfTarget :: OrgParser String
-selfTarget = try $ char '[' *> linkTarget <* char ']'
-
-linkTarget :: OrgParser String
-linkTarget = enclosedByPair '[' ']' (noneOf "\n\r[]")
-
-possiblyEmptyLinkTarget :: OrgParser String
-possiblyEmptyLinkTarget = try linkTarget <|> ("" <$ string "[]")
-
-applyCustomLinkFormat :: String -> OrgParser (F String)
-applyCustomLinkFormat link = do
- let (linkType, rest) = break (== ':') link
- return $ do
- formatter <- M.lookup linkType <$> asksF orgStateLinkFormatters
- return $ maybe link ($ drop 1 rest) formatter
-
--- | Take a link and return a function which produces new inlines when given
--- description inlines.
-linkToInlinesF :: String -> Inlines -> F Inlines
-linkToInlinesF linkStr =
- case linkStr of
- "" -> pure . B.link mempty "" -- wiki link (empty by convention)
- ('#':_) -> pure . B.link linkStr "" -- document-local fraction
- _ -> case cleanLinkString linkStr of
- (Just cleanedLink) -> if isImageFilename cleanedLink
- then const . pure $ B.image cleanedLink "" ""
- else pure . B.link cleanedLink ""
- Nothing -> internalLink linkStr -- other internal link
-
--- | Cleanup and canonicalize a string describing a link. Return @Nothing@ if
--- the string does not appear to be a link.
-cleanLinkString :: String -> Maybe String
-cleanLinkString s =
- case s of
- '/':_ -> Just $ "file://" ++ s -- absolute path
- '.':'/':_ -> Just s -- relative path
- '.':'.':'/':_ -> Just s -- relative path
- -- Relative path or URL (file schema)
- 'f':'i':'l':'e':':':s' -> Just $ if ("//" `isPrefixOf` s') then s else s'
- _ | isUrl s -> Just s -- URL
- _ -> Nothing
- where
- isUrl :: String -> Bool
- isUrl cs =
- let (scheme, path) = break (== ':') cs
- in all (\c -> isAlphaNum c || c `elem` (".-"::String)) scheme
- && not (null path)
-
-isImageFilename :: String -> Bool
-isImageFilename filename =
- any (\x -> ('.':x) `isSuffixOf` filename) imageExtensions &&
- (any (\x -> (x++":") `isPrefixOf` filename) protocols ||
- ':' `notElem` filename)
- where
- imageExtensions = [ "jpeg" , "jpg" , "png" , "gif" , "svg" ]
- protocols = [ "file", "http", "https" ]
-
-internalLink :: String -> Inlines -> F Inlines
-internalLink link title = do
- anchorB <- (link `elem`) <$> asksF orgStateAnchorIds
- if anchorB
- then return $ B.link ('#':link) "" title
- else return $ B.emph title
-
--- | Parse an anchor like @<<anchor-id>>@ and return an empty span with
--- @anchor-id@ set as id. Legal anchors in org-mode are defined through
--- @org-target-regexp@, which is fairly liberal. Since no link is created if
--- @anchor-id@ contains spaces, we are more restrictive in what is accepted as
--- an anchor.
-
-anchor :: OrgParser (F Inlines)
-anchor = try $ do
- anchorId <- parseAnchor
- recordAnchorId anchorId
- returnF $ B.spanWith (solidify anchorId, [], []) mempty
- where
- parseAnchor = string "<<"
- *> many1 (noneOf "\t\n\r<>\"' ")
- <* string ">>"
- <* skipSpaces
-
--- | Replace every char but [a-zA-Z0-9_.-:] with a hypen '-'. This mirrors
--- the org function @org-export-solidify-link-text@.
-
-solidify :: String -> String
-solidify = map replaceSpecialChar
- where replaceSpecialChar c
- | isAlphaNum c = c
- | c `elem` ("_.-:" :: String) = c
- | otherwise = '-'
-
--- | Parses an inline code block and marks it as an babel block.
-inlineCodeBlock :: OrgParser (F Inlines)
-inlineCodeBlock = try $ do
- string "src_"
- lang <- many1 orgArgWordChar
- opts <- option [] $ enclosedByPair '[' ']' inlineBlockOption
- inlineCode <- enclosedByPair '{' '}' (noneOf "\n\r")
- let attrClasses = [translateLang lang, rundocBlockClass]
- let attrKeyVal = map toRundocAttrib (("language", lang) : opts)
- returnF $ B.codeWith ("", attrClasses, attrKeyVal) inlineCode
-
-enclosedByPair :: Char -- ^ opening char
- -> Char -- ^ closing char
- -> OrgParser a -- ^ parser
- -> OrgParser [a]
-enclosedByPair s e p = char s *> many1Till p (char e)
-
-emph :: OrgParser (F Inlines)
-emph = fmap B.emph <$> emphasisBetween '/'
-
-strong :: OrgParser (F Inlines)
-strong = fmap B.strong <$> emphasisBetween '*'
-
-strikeout :: OrgParser (F Inlines)
-strikeout = fmap B.strikeout <$> emphasisBetween '+'
-
--- There is no underline, so we use strong instead.
-underline :: OrgParser (F Inlines)
-underline = fmap B.strong <$> emphasisBetween '_'
-
-verbatim :: OrgParser (F Inlines)
-verbatim = return . B.code <$> verbatimBetween '='
-
-code :: OrgParser (F Inlines)
-code = return . B.code <$> verbatimBetween '~'
-
-subscript :: OrgParser (F Inlines)
-subscript = fmap B.subscript <$> try (char '_' *> subOrSuperExpr)
-
-superscript :: OrgParser (F Inlines)
-superscript = fmap B.superscript <$> try (char '^' *> subOrSuperExpr)
-
-math :: OrgParser (F Inlines)
-math = return . B.math <$> choice [ math1CharBetween '$'
- , mathStringBetween '$'
- , rawMathBetween "\\(" "\\)"
- ]
-
-displayMath :: OrgParser (F Inlines)
-displayMath = return . B.displayMath <$> choice [ rawMathBetween "\\[" "\\]"
- , rawMathBetween "$$" "$$"
- ]
-
-updatePositions :: Char
- -> OrgParser (Char)
-updatePositions c = do
- when (c `elem` emphasisPreChars) updateLastPreCharPos
- when (c `elem` emphasisForbiddenBorderChars) updateLastForbiddenCharPos
- return c
-
-symbol :: OrgParser (F Inlines)
-symbol = return . B.str . (: "") <$> (oneOf specialChars >>= updatePositions)
-
-emphasisBetween :: Char
- -> OrgParser (F Inlines)
-emphasisBetween c = try $ do
- startEmphasisNewlinesCounting emphasisAllowedNewlines
- res <- enclosedInlines (emphasisStart c) (emphasisEnd c)
- isTopLevelEmphasis <- null . orgStateEmphasisCharStack <$> getState
- when isTopLevelEmphasis
- resetEmphasisNewlines
- return res
-
-verbatimBetween :: Char
- -> OrgParser String
-verbatimBetween c = try $
- emphasisStart c *>
- many1TillNOrLessNewlines 1 (noneOf "\n\r") (emphasisEnd c)
-
--- | Parses a raw string delimited by @c@ using Org's math rules
-mathStringBetween :: Char
- -> OrgParser String
-mathStringBetween c = try $ do
- mathStart c
- body <- many1TillNOrLessNewlines mathAllowedNewlines
- (noneOf (c:"\n\r"))
- (lookAhead $ mathEnd c)
- final <- mathEnd c
- return $ body ++ [final]
-
--- | Parse a single character between @c@ using math rules
-math1CharBetween :: Char
- -> OrgParser String
-math1CharBetween c = try $ do
- char c
- res <- noneOf $ c:mathForbiddenBorderChars
- char c
- eof <|> () <$ lookAhead (oneOf mathPostChars)
- return [res]
-
-rawMathBetween :: String
- -> String
- -> OrgParser String
-rawMathBetween s e = try $ string s *> manyTill anyChar (try $ string e)
-
--- | Parses the start (opening character) of emphasis
-emphasisStart :: Char -> OrgParser Char
-emphasisStart c = try $ do
- guard =<< afterEmphasisPreChar
- guard =<< notAfterString
- char c
- lookAhead (noneOf emphasisForbiddenBorderChars)
- pushToInlineCharStack c
- return c
-
--- | Parses the closing character of emphasis
-emphasisEnd :: Char -> OrgParser Char
-emphasisEnd c = try $ do
- guard =<< notAfterForbiddenBorderChar
- char c
- eof <|> () <$ lookAhead acceptablePostChars
- updateLastStrPos
- popInlineCharStack
- return c
- where acceptablePostChars =
- surroundingEmphasisChar >>= \x -> oneOf (x ++ emphasisPostChars)
-
-mathStart :: Char -> OrgParser Char
-mathStart c = try $
- char c <* notFollowedBy' (oneOf (c:mathForbiddenBorderChars))
-
-mathEnd :: Char -> OrgParser Char
-mathEnd c = try $ do
- res <- noneOf (c:mathForbiddenBorderChars)
- char c
- eof <|> () <$ lookAhead (oneOf mathPostChars)
- return res
-
-
-enclosedInlines :: OrgParser a
- -> OrgParser b
- -> OrgParser (F Inlines)
-enclosedInlines start end = try $
- trimInlinesF . mconcat <$> enclosed start end inline
-
-enclosedRaw :: OrgParser a
- -> OrgParser b
- -> OrgParser String
-enclosedRaw start end = try $
- start *> (onSingleLine <|> spanningTwoLines)
- where onSingleLine = try $ many1Till (noneOf "\n\r") end
- spanningTwoLines = try $
- anyLine >>= \f -> mappend (f <> " ") <$> onSingleLine
-
--- | Like many1Till, but parses at most @n+1@ lines. @p@ must not consume
--- newlines.
-many1TillNOrLessNewlines :: Int
- -> OrgParser Char
- -> OrgParser a
- -> OrgParser String
-many1TillNOrLessNewlines n p end = try $
- nMoreLines (Just n) mempty >>= oneOrMore
- where
- nMoreLines Nothing cs = return cs
- nMoreLines (Just 0) cs = try $ (cs ++) <$> finalLine
- nMoreLines k cs = try $ (final k cs <|> rest k cs)
- >>= uncurry nMoreLines
- final _ cs = (\x -> (Nothing, cs ++ x)) <$> try finalLine
- rest m cs = (\x -> (minus1 <$> m, cs ++ x ++ "\n")) <$> try (manyTill p newline)
- finalLine = try $ manyTill p end
- minus1 k = k - 1
- oneOrMore cs = guard (not $ null cs) *> return cs
-
--- Org allows customization of the way it reads emphasis. We use the defaults
--- here (see, e.g., the Emacs Lisp variable `org-emphasis-regexp-components`
--- for details).
-
--- | Chars allowed to occur before emphasis (spaces and newlines are ok, too)
-emphasisPreChars :: [Char]
-emphasisPreChars = "\t \"'({"
-
--- | Chars allowed at after emphasis
-emphasisPostChars :: [Char]
-emphasisPostChars = "\t\n !\"'),-.:;?\\}"
-
--- | Chars not allowed at the (inner) border of emphasis
-emphasisForbiddenBorderChars :: [Char]
-emphasisForbiddenBorderChars = "\t\n\r \"',"
-
--- | The maximum number of newlines within
-emphasisAllowedNewlines :: Int
-emphasisAllowedNewlines = 1
-
--- LaTeX-style math: see `org-latex-regexps` for details
-
--- | Chars allowed after an inline ($...$) math statement
-mathPostChars :: [Char]
-mathPostChars = "\t\n \"'),-.:;?"
-
--- | Chars not allowed at the (inner) border of math
-mathForbiddenBorderChars :: [Char]
-mathForbiddenBorderChars = "\t\n\r ,;.$"
-
--- | Maximum number of newlines in an inline math statement
-mathAllowedNewlines :: Int
-mathAllowedNewlines = 2
-
--- | Whether we are right behind a char allowed before emphasis
-afterEmphasisPreChar :: OrgParser Bool
-afterEmphasisPreChar = do
- pos <- getPosition
- lastPrePos <- orgStateLastPreCharPos <$> getState
- return . fromMaybe True $ (== pos) <$> lastPrePos
-
--- | Whether the parser is right after a forbidden border char
-notAfterForbiddenBorderChar :: OrgParser Bool
-notAfterForbiddenBorderChar = do
- pos <- getPosition
- lastFBCPos <- orgStateLastForbiddenCharPos <$> getState
- return $ lastFBCPos /= Just pos
-
--- | Read a sub- or superscript expression
-subOrSuperExpr :: OrgParser (F Inlines)
-subOrSuperExpr = try $
- choice [ id <$> charsInBalanced '{' '}' (noneOf "\n\r")
- , enclosing ('(', ')') <$> charsInBalanced '(' ')' (noneOf "\n\r")
- , simpleSubOrSuperString
- ] >>= parseFromString (mconcat <$> many inline)
- where enclosing (left, right) s = left : s ++ [right]
-
-simpleSubOrSuperString :: OrgParser String
-simpleSubOrSuperString = try $ do
- state <- getState
- guard . exportSubSuperscripts . orgStateExportSettings $ state
- choice [ string "*"
- , mappend <$> option [] ((:[]) <$> oneOf "+-")
- <*> many1 alphaNum
- ]
-
-inlineLaTeX :: OrgParser (F Inlines)
-inlineLaTeX = try $ do
- cmd <- inlineLaTeXCommand
- maybe mzero returnF $
- parseAsMath cmd `mplus` parseAsMathMLSym cmd `mplus` parseAsInlineLaTeX cmd
- where
- parseAsMath :: String -> Maybe Inlines
- parseAsMath cs = B.fromList <$> texMathToPandoc cs
-
- parseAsInlineLaTeX :: String -> Maybe Inlines
- parseAsInlineLaTeX cs = maybeRight $ runParser inlineCommand state "" cs
-
- parseAsMathMLSym :: String -> Maybe Inlines
- parseAsMathMLSym cs = B.str <$> MathMLEntityMap.getUnicode (clean cs)
- -- drop initial backslash and any trailing "{}"
- where clean = dropWhileEnd (`elem` ("{}" :: String)) . drop 1
-
- state :: ParserState
- state = def{ stateOptions = def{ readerParseRaw = True }}
-
- texMathToPandoc :: String -> Maybe [Inline]
- texMathToPandoc cs = (maybeRight $ readTeX cs) >>= writePandoc DisplayInline
-
-maybeRight :: Either a b -> Maybe b
-maybeRight = either (const Nothing) Just
-
-inlineLaTeXCommand :: OrgParser String
-inlineLaTeXCommand = try $ do
- rest <- getInput
- case runParser rawLaTeXInline def "source" rest of
- Right (RawInline _ cs) -> do
- -- drop any trailing whitespace, those are not be part of the command as
- -- far as org mode is concerned.
- let cmdNoSpc = dropWhileEnd isSpace cs
- let len = length cmdNoSpc
- count len anyChar
- return cmdNoSpc
- _ -> mzero
-
--- Taken from Data.OldList.
-dropWhileEnd :: (a -> Bool) -> [a] -> [a]
-dropWhileEnd p = foldr (\x xs -> if p x && null xs then [] else x : xs) []
-
-smart :: OrgParser (F Inlines)
-smart = do
- getOption readerSmart >>= guard
- doubleQuoted <|> singleQuoted <|>
- choice (map (return <$>) [orgApostrophe, orgDash, orgEllipses])
- where
- orgDash = dash <* updatePositions '-'
- orgEllipses = ellipses <* updatePositions '.'
- orgApostrophe =
- (char '\'' <|> char '\8217') <* updateLastPreCharPos
- <* updateLastForbiddenCharPos
- *> return (B.str "\x2019")
-
-singleQuoted :: OrgParser (F Inlines)
-singleQuoted = try $ do
- singleQuoteStart
- updatePositions '\''
- withQuoteContext InSingleQuote $
- fmap B.singleQuoted . trimInlinesF . mconcat <$>
- many1Till inline (singleQuoteEnd <* updatePositions '\'')
-
--- doubleQuoted will handle regular double-quoted sections, as well
--- as dialogues with an open double-quote without a close double-quote
--- in the same paragraph.
-doubleQuoted :: OrgParser (F Inlines)
-doubleQuoted = try $ do
- doubleQuoteStart
- updatePositions '"'
- contents <- mconcat <$> many (try $ notFollowedBy doubleQuoteEnd >> inline)
- (withQuoteContext InDoubleQuote $ (doubleQuoteEnd <* updateLastForbiddenCharPos) >> return
- (fmap B.doubleQuoted . trimInlinesF $ contents))
- <|> (return $ return (B.str "\8220") <> contents)
diff --git a/src/Text/Pandoc/Readers/Org/BlockStarts.hs b/src/Text/Pandoc/Readers/Org/BlockStarts.hs
new file mode 100644
index 000000000..e4dc31342
--- /dev/null
+++ b/src/Text/Pandoc/Readers/Org/BlockStarts.hs
@@ -0,0 +1,112 @@
+{-
+Copyright (C) 2014-2016 Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
+
+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.Org.Options
+ Copyright : Copyright (C) 2014-2016 Albert Krewinkel
+ License : GNU GPL, version 2 or above
+
+ Maintainer : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
+
+Parsers for Org-mode inline elements.
+-}
+module Text.Pandoc.Readers.Org.BlockStarts
+ ( exampleLineStart
+ , hline
+ , noteMarker
+ , tableStart
+ , drawerStart
+ , headerStart
+ , metaLineStart
+ , latexEnvStart
+ , commentLineStart
+ , bulletListStart
+ , orderedListStart
+ ) where
+
+import Text.Pandoc.Readers.Org.Parsing
+
+-- | Horizontal Line (five -- dashes or more)
+hline :: OrgParser ()
+hline = try $ do
+ skipSpaces
+ string "-----"
+ many (char '-')
+ skipSpaces
+ newline
+ return ()
+
+-- | Read the start of a header line, return the header level
+headerStart :: OrgParser Int
+headerStart = try $
+ (length <$> many1 (char '*')) <* many1 (char ' ') <* updateLastPreCharPos
+
+tableStart :: OrgParser Char
+tableStart = try $ skipSpaces *> char '|'
+
+latexEnvStart :: OrgParser String
+latexEnvStart = try $ do
+ skipSpaces *> string "\\begin{"
+ *> latexEnvName
+ <* string "}"
+ <* blankline
+ where
+ latexEnvName :: OrgParser String
+ latexEnvName = try $ mappend <$> many1 alphaNum <*> option "" (string "*")
+
+
+-- | Parses bullet list marker.
+bulletListStart :: OrgParser ()
+bulletListStart = try $
+ choice
+ [ () <$ skipSpaces <* oneOf "+-" <* skipSpaces1
+ , () <$ skipSpaces1 <* char '*' <* skipSpaces1
+ ]
+
+genericListStart :: OrgParser String
+ -> OrgParser Int
+genericListStart listMarker = try $
+ (+) <$> (length <$> many spaceChar)
+ <*> (length <$> listMarker <* many1 spaceChar)
+
+orderedListStart :: OrgParser Int
+orderedListStart = genericListStart orderedListMarker
+ -- Ordered list markers allowed in org-mode
+ where orderedListMarker = mappend <$> many1 digit <*> (pure <$> oneOf ".)")
+
+drawerStart :: OrgParser String
+drawerStart = try $
+ skipSpaces *> drawerName <* skipSpaces <* newline
+ where drawerName = char ':' *> manyTill nonspaceChar (char ':')
+
+metaLineStart :: OrgParser ()
+metaLineStart = try $ skipSpaces <* string "#+"
+
+commentLineStart :: OrgParser ()
+commentLineStart = try $ skipSpaces <* string "# "
+
+exampleLineStart :: OrgParser ()
+exampleLineStart = () <$ try (skipSpaces *> string ": ")
+
+noteMarker :: OrgParser String
+noteMarker = try $ do
+ char '['
+ choice [ many1Till digit (char ']')
+ , (++) <$> string "fn:"
+ <*> many1Till (noneOf "\n\r\t ") (char ']')
+ ]
diff --git a/src/Text/Pandoc/Readers/Org/Inlines.hs b/src/Text/Pandoc/Readers/Org/Inlines.hs
new file mode 100644
index 000000000..0c3840979
--- /dev/null
+++ b/src/Text/Pandoc/Readers/Org/Inlines.hs
@@ -0,0 +1,715 @@
+{-# LANGUAGE OverloadedStrings #-}
+{-
+Copyright (C) 2014-2016 Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
+
+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.Org.Options
+ Copyright : Copyright (C) 2014-2016 Albert Krewinkel
+ License : GNU GPL, version 2 or above
+
+ Maintainer : Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
+
+Parsers for Org-mode inline elements.
+-}
+module Text.Pandoc.Readers.Org.Inlines
+ ( inline
+ , addToNotesTable
+ , parseInlines
+ , isImageFilename
+ , linkTarget
+ ) where
+
+import Text.Pandoc.Readers.Org.BlockStarts
+import Text.Pandoc.Readers.Org.ParserState
+import Text.Pandoc.Readers.Org.Parsing
+
+import qualified Text.Pandoc.Builder as B
+import Text.Pandoc.Builder ( Inlines )
+import Text.Pandoc.Definition
+import Text.Pandoc.Compat.Monoid ( (<>) )
+import Text.Pandoc.Options
+import Text.Pandoc.Readers.LaTeX ( inlineCommand, rawLaTeXInline )
+import Text.TeXMath ( readTeX, writePandoc, DisplayType(..) )
+import qualified Text.TeXMath.Readers.MathML.EntityMap as MathMLEntityMap
+
+import Control.Arrow ( first )
+import Control.Monad ( guard, mplus, mzero, when )
+import Data.Char ( isAlphaNum, isSpace )
+import Data.List ( isPrefixOf, isSuffixOf )
+import Data.Maybe ( fromMaybe )
+import qualified Data.Map as M
+
+-- | Prefix used for Rundoc classes and arguments.
+rundocPrefix :: String
+rundocPrefix = "rundoc-"
+
+-- | The class-name used to mark rundoc blocks.
+rundocBlockClass :: String
+rundocBlockClass = rundocPrefix ++ "block"
+
+toRundocAttrib :: (String, String) -> (String, String)
+toRundocAttrib = first ("rundoc-" ++)
+
+translateLang :: String -> String
+translateLang "C" = "c"
+translateLang "C++" = "cpp"
+translateLang "emacs-lisp" = "commonlisp" -- emacs lisp is not supported
+translateLang "js" = "javascript"
+translateLang "lisp" = "commonlisp"
+translateLang "R" = "r"
+translateLang "sh" = "bash"
+translateLang "sqlite" = "sql"
+translateLang cs = cs
+
+--
+-- Functions acting on the parser state
+--
+recordAnchorId :: String -> OrgParser ()
+recordAnchorId i = updateState $ \s ->
+ s{ orgStateAnchorIds = i : (orgStateAnchorIds s) }
+
+pushToInlineCharStack :: Char -> OrgParser ()
+pushToInlineCharStack c = updateState $ \s ->
+ s{ orgStateEmphasisCharStack = c:orgStateEmphasisCharStack s }
+
+popInlineCharStack :: OrgParser ()
+popInlineCharStack = updateState $ \s ->
+ s{ orgStateEmphasisCharStack = drop 1 . orgStateEmphasisCharStack $ s }
+
+surroundingEmphasisChar :: OrgParser [Char]
+surroundingEmphasisChar =
+ take 1 . drop 1 . orgStateEmphasisCharStack <$> getState
+
+startEmphasisNewlinesCounting :: Int -> OrgParser ()
+startEmphasisNewlinesCounting maxNewlines = updateState $ \s ->
+ s{ orgStateEmphasisNewlines = Just maxNewlines }
+
+decEmphasisNewlinesCount :: OrgParser ()
+decEmphasisNewlinesCount = updateState $ \s ->
+ s{ orgStateEmphasisNewlines = (\n -> n - 1) <$> orgStateEmphasisNewlines s }
+
+newlinesCountWithinLimits :: OrgParser Bool
+newlinesCountWithinLimits = do
+ st <- getState
+ return $ ((< 0) <$> orgStateEmphasisNewlines st) /= Just True
+
+resetEmphasisNewlines :: OrgParser ()
+resetEmphasisNewlines = updateState $ \s ->
+ s{ orgStateEmphasisNewlines = Nothing }
+
+addToNotesTable :: OrgNoteRecord -> OrgParser ()
+addToNotesTable note = do
+ oldnotes <- orgStateNotes' <$> getState
+ updateState $ \s -> s{ orgStateNotes' = note:oldnotes }
+
+-- | Parse a single Org-mode inline element
+inline :: OrgParser (F Inlines)
+inline =
+ choice [ whitespace
+ , linebreak
+ , cite
+ , footnote
+ , linkOrImage
+ , anchor
+ , inlineCodeBlock
+ , str
+ , endline
+ , emph
+ , strong
+ , strikeout
+ , underline
+ , code
+ , math
+ , displayMath
+ , verbatim
+ , subscript
+ , superscript
+ , inlineLaTeX
+ , smart
+ , symbol
+ ] <* (guard =<< newlinesCountWithinLimits)
+ <?> "inline"
+
+parseInlines :: OrgParser (F Inlines)
+parseInlines = trimInlinesF . mconcat <$> many1 inline
+
+-- treat these as potentially non-text when parsing inline:
+specialChars :: [Char]
+specialChars = "\"$'()*+-,./:<=>[\\]^_{|}~"
+
+
+whitespace :: OrgParser (F Inlines)
+whitespace = pure B.space <$ skipMany1 spaceChar
+ <* updateLastPreCharPos
+ <* updateLastForbiddenCharPos
+ <?> "whitespace"
+
+linebreak :: OrgParser (F Inlines)
+linebreak = try $ pure B.linebreak <$ string "\\\\" <* skipSpaces <* newline
+
+str :: OrgParser (F Inlines)
+str = return . B.str <$> many1 (noneOf $ specialChars ++ "\n\r ")
+ <* updateLastStrPos
+
+-- | An endline character that can be treated as a space, not a structural
+-- break. This should reflect the values of the Emacs variable
+-- @org-element-pagaraph-separate@.
+endline :: OrgParser (F Inlines)
+endline = try $ do
+ newline
+ notFollowedBy blankline
+ notFollowedBy' exampleLineStart
+ notFollowedBy' hline
+ notFollowedBy' noteMarker
+ notFollowedBy' tableStart
+ notFollowedBy' drawerStart
+ notFollowedBy' headerStart
+ notFollowedBy' metaLineStart
+ notFollowedBy' latexEnvStart
+ notFollowedBy' commentLineStart
+ notFollowedBy' bulletListStart
+ notFollowedBy' orderedListStart
+ decEmphasisNewlinesCount
+ guard =<< newlinesCountWithinLimits
+ updateLastPreCharPos
+ return . return $ B.softbreak
+
+cite :: OrgParser (F Inlines)
+cite = try $ do
+ guardEnabled Ext_citations
+ (cs, raw) <- withRaw normalCite
+ return $ (flip B.cite (B.text raw)) <$> cs
+
+normalCite :: OrgParser (F [Citation])
+normalCite = try $ char '['
+ *> skipSpaces
+ *> citeList
+ <* skipSpaces
+ <* char ']'
+
+citeList :: OrgParser (F [Citation])
+citeList = sequence <$> sepBy1 citation (try $ char ';' *> skipSpaces)
+
+citation :: OrgParser (F Citation)
+citation = try $ do
+ pref <- prefix
+ (suppress_author, key) <- citeKey
+ suff <- suffix
+ return $ do
+ x <- pref
+ y <- suff
+ return $ Citation{ citationId = key
+ , citationPrefix = B.toList x
+ , citationSuffix = B.toList y
+ , citationMode = if suppress_author
+ then SuppressAuthor
+ else NormalCitation
+ , citationNoteNum = 0
+ , citationHash = 0
+ }
+ where
+ prefix = trimInlinesF . mconcat <$>
+ manyTill inline (char ']' <|> (']' <$ lookAhead citeKey))
+ suffix = try $ do
+ hasSpace <- option False (notFollowedBy nonspaceChar >> return True)
+ skipSpaces
+ rest <- trimInlinesF . mconcat <$>
+ many (notFollowedBy (oneOf ";]") *> inline)
+ return $ if hasSpace
+ then (B.space <>) <$> rest
+ else rest
+
+footnote :: OrgParser (F Inlines)
+footnote = try $ inlineNote <|> referencedNote
+
+inlineNote :: OrgParser (F Inlines)
+inlineNote = try $ do
+ string "[fn:"
+ ref <- many alphaNum
+ char ':'
+ note <- fmap B.para . trimInlinesF . mconcat <$> many1Till inline (char ']')
+ when (not $ null ref) $
+ addToNotesTable ("fn:" ++ ref, note)
+ return $ B.note <$> note
+
+referencedNote :: OrgParser (F Inlines)
+referencedNote = try $ do
+ ref <- noteMarker
+ return $ do
+ notes <- asksF orgStateNotes'
+ case lookup ref notes of
+ Nothing -> return $ B.str $ "[" ++ ref ++ "]"
+ Just contents -> do
+ st <- askF
+ let contents' = runF contents st{ orgStateNotes' = [] }
+ return $ B.note contents'
+
+linkOrImage :: OrgParser (F Inlines)
+linkOrImage = explicitOrImageLink
+ <|> selflinkOrImage
+ <|> angleLink
+ <|> plainLink
+ <?> "link or image"
+
+explicitOrImageLink :: OrgParser (F Inlines)
+explicitOrImageLink = try $ do
+ char '['
+ srcF <- applyCustomLinkFormat =<< possiblyEmptyLinkTarget
+ title <- enclosedRaw (char '[') (char ']')
+ title' <- parseFromString (mconcat <$> many inline) title
+ char ']'
+ return $ do
+ src <- srcF
+ if isImageFilename title
+ then pure $ B.link src "" $ B.image title mempty mempty
+ else linkToInlinesF src =<< title'
+
+selflinkOrImage :: OrgParser (F Inlines)
+selflinkOrImage = try $ do
+ src <- char '[' *> linkTarget <* char ']'
+ return $ linkToInlinesF src (B.str src)
+
+plainLink :: OrgParser (F Inlines)
+plainLink = try $ do
+ (orig, src) <- uri
+ returnF $ B.link src "" (B.str orig)
+
+angleLink :: OrgParser (F Inlines)
+angleLink = try $ do
+ char '<'
+ link <- plainLink
+ char '>'
+ return link
+
+linkTarget :: OrgParser String
+linkTarget = enclosedByPair '[' ']' (noneOf "\n\r[]")
+
+possiblyEmptyLinkTarget :: OrgParser String
+possiblyEmptyLinkTarget = try linkTarget <|> ("" <$ string "[]")
+
+applyCustomLinkFormat :: String -> OrgParser (F String)
+applyCustomLinkFormat link = do
+ let (linkType, rest) = break (== ':') link
+ return $ do
+ formatter <- M.lookup linkType <$> asksF orgStateLinkFormatters
+ return $ maybe link ($ drop 1 rest) formatter
+
+-- | Take a link and return a function which produces new inlines when given
+-- description inlines.
+linkToInlinesF :: String -> Inlines -> F Inlines
+linkToInlinesF linkStr =
+ case linkStr of
+ "" -> pure . B.link mempty "" -- wiki link (empty by convention)
+ ('#':_) -> pure . B.link linkStr "" -- document-local fraction
+ _ -> case cleanLinkString linkStr of
+ (Just cleanedLink) -> if isImageFilename cleanedLink
+ then const . pure $ B.image cleanedLink "" ""
+ else pure . B.link cleanedLink ""
+ Nothing -> internalLink linkStr -- other internal link
+
+-- | Cleanup and canonicalize a string describing a link. Return @Nothing@ if
+-- the string does not appear to be a link.
+cleanLinkString :: String -> Maybe String
+cleanLinkString s =
+ case s of
+ '/':_ -> Just $ "file://" ++ s -- absolute path
+ '.':'/':_ -> Just s -- relative path
+ '.':'.':'/':_ -> Just s -- relative path
+ -- Relative path or URL (file schema)
+ 'f':'i':'l':'e':':':s' -> Just $ if ("//" `isPrefixOf` s') then s else s'
+ _ | isUrl s -> Just s -- URL
+ _ -> Nothing
+ where
+ isUrl :: String -> Bool
+ isUrl cs =
+ let (scheme, path) = break (== ':') cs
+ in all (\c -> isAlphaNum c || c `elem` (".-"::String)) scheme
+ && not (null path)
+
+isImageFilename :: String -> Bool
+isImageFilename filename =
+ any (\x -> ('.':x) `isSuffixOf` filename) imageExtensions &&
+ (any (\x -> (x++":") `isPrefixOf` filename) protocols ||
+ ':' `notElem` filename)
+ where
+ imageExtensions = [ "jpeg" , "jpg" , "png" , "gif" , "svg" ]
+ protocols = [ "file", "http", "https" ]
+
+internalLink :: String -> Inlines -> F Inlines
+internalLink link title = do
+ anchorB <- (link `elem`) <$> asksF orgStateAnchorIds
+ if anchorB
+ then return $ B.link ('#':link) "" title
+ else return $ B.emph title
+
+-- | Parse an anchor like @<<anchor-id>>@ and return an empty span with
+-- @anchor-id@ set as id. Legal anchors in org-mode are defined through
+-- @org-target-regexp@, which is fairly liberal. Since no link is created if
+-- @anchor-id@ contains spaces, we are more restrictive in what is accepted as
+-- an anchor.
+
+anchor :: OrgParser (F Inlines)
+anchor = try $ do
+ anchorId <- parseAnchor
+ recordAnchorId anchorId
+ returnF $ B.spanWith (solidify anchorId, [], []) mempty
+ where
+ parseAnchor = string "<<"
+ *> many1 (noneOf "\t\n\r<>\"' ")
+ <* string ">>"
+ <* skipSpaces
+
+-- | Replace every char but [a-zA-Z0-9_.-:] with a hypen '-'. This mirrors
+-- the org function @org-export-solidify-link-text@.
+
+solidify :: String -> String
+solidify = map replaceSpecialChar
+ where replaceSpecialChar c
+ | isAlphaNum c = c
+ | c `elem` ("_.-:" :: String) = c
+ | otherwise = '-'
+
+-- | Parses an inline code block and marks it as an babel block.
+inlineCodeBlock :: OrgParser (F Inlines)
+inlineCodeBlock = try $ do
+ string "src_"
+ lang <- many1 orgArgWordChar
+ opts <- option [] $ enclosedByPair '[' ']' inlineBlockOption
+ inlineCode <- enclosedByPair '{' '}' (noneOf "\n\r")
+ let attrClasses = [translateLang lang, rundocBlockClass]
+ let attrKeyVal = map toRundocAttrib (("language", lang) : opts)
+ returnF $ B.codeWith ("", attrClasses, attrKeyVal) inlineCode
+ where
+ inlineBlockOption :: OrgParser (String, String)
+ inlineBlockOption = try $ do
+ argKey <- orgArgKey
+ paramValue <- option "yes" orgInlineParamValue
+ return (argKey, paramValue)
+
+ orgInlineParamValue :: OrgParser String
+ orgInlineParamValue = try $
+ skipSpaces
+ *> notFollowedBy (char ':')
+ *> many1 (noneOf "\t\n\r ]")
+ <* skipSpaces
+
+
+
+enclosedByPair :: Char -- ^ opening char
+ -> Char -- ^ closing char
+ -> OrgParser a -- ^ parser
+ -> OrgParser [a]
+enclosedByPair s e p = char s *> many1Till p (char e)
+
+emph :: OrgParser (F Inlines)
+emph = fmap B.emph <$> emphasisBetween '/'
+
+strong :: OrgParser (F Inlines)
+strong = fmap B.strong <$> emphasisBetween '*'
+
+strikeout :: OrgParser (F Inlines)
+strikeout = fmap B.strikeout <$> emphasisBetween '+'
+
+-- There is no underline, so we use strong instead.
+underline :: OrgParser (F Inlines)
+underline = fmap B.strong <$> emphasisBetween '_'
+
+verbatim :: OrgParser (F Inlines)
+verbatim = return . B.code <$> verbatimBetween '='
+
+code :: OrgParser (F Inlines)
+code = return . B.code <$> verbatimBetween '~'
+
+subscript :: OrgParser (F Inlines)
+subscript = fmap B.subscript <$> try (char '_' *> subOrSuperExpr)
+
+superscript :: OrgParser (F Inlines)
+superscript = fmap B.superscript <$> try (char '^' *> subOrSuperExpr)
+
+math :: OrgParser (F Inlines)
+math = return . B.math <$> choice [ math1CharBetween '$'
+ , mathStringBetween '$'
+ , rawMathBetween "\\(" "\\)"
+ ]
+
+displayMath :: OrgParser (F Inlines)
+displayMath = return . B.displayMath <$> choice [ rawMathBetween "\\[" "\\]"
+ , rawMathBetween "$$" "$$"
+ ]
+
+updatePositions :: Char
+ -> OrgParser (Char)
+updatePositions c = do
+ when (c `elem` emphasisPreChars) updateLastPreCharPos
+ when (c `elem` emphasisForbiddenBorderChars) updateLastForbiddenCharPos
+ return c
+
+symbol :: OrgParser (F Inlines)
+symbol = return . B.str . (: "") <$> (oneOf specialChars >>= updatePositions)
+
+emphasisBetween :: Char
+ -> OrgParser (F Inlines)
+emphasisBetween c = try $ do
+ startEmphasisNewlinesCounting emphasisAllowedNewlines
+ res <- enclosedInlines (emphasisStart c) (emphasisEnd c)
+ isTopLevelEmphasis <- null . orgStateEmphasisCharStack <$> getState
+ when isTopLevelEmphasis
+ resetEmphasisNewlines
+ return res
+
+verbatimBetween :: Char
+ -> OrgParser String
+verbatimBetween c = try $
+ emphasisStart c *>
+ many1TillNOrLessNewlines 1 (noneOf "\n\r") (emphasisEnd c)
+
+-- | Parses a raw string delimited by @c@ using Org's math rules
+mathStringBetween :: Char
+ -> OrgParser String
+mathStringBetween c = try $ do
+ mathStart c
+ body <- many1TillNOrLessNewlines mathAllowedNewlines
+ (noneOf (c:"\n\r"))
+ (lookAhead $ mathEnd c)
+ final <- mathEnd c
+ return $ body ++ [final]
+
+-- | Parse a single character between @c@ using math rules
+math1CharBetween :: Char
+ -> OrgParser String
+math1CharBetween c = try $ do
+ char c
+ res <- noneOf $ c:mathForbiddenBorderChars
+ char c
+ eof <|> () <$ lookAhead (oneOf mathPostChars)
+ return [res]
+
+rawMathBetween :: String
+ -> String
+ -> OrgParser String
+rawMathBetween s e = try $ string s *> manyTill anyChar (try $ string e)
+
+-- | Parses the start (opening character) of emphasis
+emphasisStart :: Char -> OrgParser Char
+emphasisStart c = try $ do
+ guard =<< afterEmphasisPreChar
+ guard =<< notAfterString
+ char c
+ lookAhead (noneOf emphasisForbiddenBorderChars)
+ pushToInlineCharStack c
+ return c
+
+-- | Parses the closing character of emphasis
+emphasisEnd :: Char -> OrgParser Char
+emphasisEnd c = try $ do
+ guard =<< notAfterForbiddenBorderChar
+ char c
+ eof <|> () <$ lookAhead acceptablePostChars
+ updateLastStrPos
+ popInlineCharStack
+ return c
+ where acceptablePostChars =
+ surroundingEmphasisChar >>= \x -> oneOf (x ++ emphasisPostChars)
+
+mathStart :: Char -> OrgParser Char
+mathStart c = try $
+ char c <* notFollowedBy' (oneOf (c:mathForbiddenBorderChars))
+
+mathEnd :: Char -> OrgParser Char
+mathEnd c = try $ do
+ res <- noneOf (c:mathForbiddenBorderChars)
+ char c
+ eof <|> () <$ lookAhead (oneOf mathPostChars)
+ return res
+
+
+enclosedInlines :: OrgParser a
+ -> OrgParser b
+ -> OrgParser (F Inlines)
+enclosedInlines start end = try $
+ trimInlinesF . mconcat <$> enclosed start end inline
+
+enclosedRaw :: OrgParser a
+ -> OrgParser b
+ -> OrgParser String
+enclosedRaw start end = try $
+ start *> (onSingleLine <|> spanningTwoLines)
+ where onSingleLine = try $ many1Till (noneOf "\n\r") end
+ spanningTwoLines = try $
+ anyLine >>= \f -> mappend (f <> " ") <$> onSingleLine
+
+-- | Like many1Till, but parses at most @n+1@ lines. @p@ must not consume
+-- newlines.
+many1TillNOrLessNewlines :: Int
+ -> OrgParser Char
+ -> OrgParser a
+ -> OrgParser String
+many1TillNOrLessNewlines n p end = try $
+ nMoreLines (Just n) mempty >>= oneOrMore
+ where
+ nMoreLines Nothing cs = return cs
+ nMoreLines (Just 0) cs = try $ (cs ++) <$> finalLine
+ nMoreLines k cs = try $ (final k cs <|> rest k cs)
+ >>= uncurry nMoreLines
+ final _ cs = (\x -> (Nothing, cs ++ x)) <$> try finalLine
+ rest m cs = (\x -> (minus1 <$> m, cs ++ x ++ "\n")) <$> try (manyTill p newline)
+ finalLine = try $ manyTill p end
+ minus1 k = k - 1
+ oneOrMore cs = guard (not $ null cs) *> return cs
+
+-- Org allows customization of the way it reads emphasis. We use the defaults
+-- here (see, e.g., the Emacs Lisp variable `org-emphasis-regexp-components`
+-- for details).
+
+-- | Chars allowed to occur before emphasis (spaces and newlines are ok, too)
+emphasisPreChars :: [Char]
+emphasisPreChars = "\t \"'({"
+
+-- | Chars allowed at after emphasis
+emphasisPostChars :: [Char]
+emphasisPostChars = "\t\n !\"'),-.:;?\\}"
+
+-- | Chars not allowed at the (inner) border of emphasis
+emphasisForbiddenBorderChars :: [Char]
+emphasisForbiddenBorderChars = "\t\n\r \"',"
+
+-- | The maximum number of newlines within
+emphasisAllowedNewlines :: Int
+emphasisAllowedNewlines = 1
+
+-- LaTeX-style math: see `org-latex-regexps` for details
+
+-- | Chars allowed after an inline ($...$) math statement
+mathPostChars :: [Char]
+mathPostChars = "\t\n \"'),-.:;?"
+
+-- | Chars not allowed at the (inner) border of math
+mathForbiddenBorderChars :: [Char]
+mathForbiddenBorderChars = "\t\n\r ,;.$"
+
+-- | Maximum number of newlines in an inline math statement
+mathAllowedNewlines :: Int
+mathAllowedNewlines = 2
+
+-- | Whether we are right behind a char allowed before emphasis
+afterEmphasisPreChar :: OrgParser Bool
+afterEmphasisPreChar = do
+ pos <- getPosition
+ lastPrePos <- orgStateLastPreCharPos <$> getState
+ return . fromMaybe True $ (== pos) <$> lastPrePos
+
+-- | Whether the parser is right after a forbidden border char
+notAfterForbiddenBorderChar :: OrgParser Bool
+notAfterForbiddenBorderChar = do
+ pos <- getPosition
+ lastFBCPos <- orgStateLastForbiddenCharPos <$> getState
+ return $ lastFBCPos /= Just pos
+
+-- | Read a sub- or superscript expression
+subOrSuperExpr :: OrgParser (F Inlines)
+subOrSuperExpr = try $
+ choice [ id <$> charsInBalanced '{' '}' (noneOf "\n\r")
+ , enclosing ('(', ')') <$> charsInBalanced '(' ')' (noneOf "\n\r")
+ , simpleSubOrSuperString
+ ] >>= parseFromString (mconcat <$> many inline)
+ where enclosing (left, right) s = left : s ++ [right]
+
+simpleSubOrSuperString :: OrgParser String
+simpleSubOrSuperString = try $ do
+ state <- getState
+ guard . exportSubSuperscripts . orgStateExportSettings $ state
+ choice [ string "*"
+ , mappend <$> option [] ((:[]) <$> oneOf "+-")
+ <*> many1 alphaNum
+ ]
+
+inlineLaTeX :: OrgParser (F Inlines)
+inlineLaTeX = try $ do
+ cmd <- inlineLaTeXCommand
+ maybe mzero returnF $
+ parseAsMath cmd `mplus` parseAsMathMLSym cmd `mplus` parseAsInlineLaTeX cmd
+ where
+ parseAsMath :: String -> Maybe Inlines
+ parseAsMath cs = B.fromList <$> texMathToPandoc cs
+
+ parseAsInlineLaTeX :: String -> Maybe Inlines
+ parseAsInlineLaTeX cs = maybeRight $ runParser inlineCommand state "" cs
+
+ parseAsMathMLSym :: String -> Maybe Inlines
+ parseAsMathMLSym cs = B.str <$> MathMLEntityMap.getUnicode (clean cs)
+ -- drop initial backslash and any trailing "{}"
+ where clean = dropWhileEnd (`elem` ("{}" :: String)) . drop 1
+
+ state :: ParserState
+ state = def{ stateOptions = def{ readerParseRaw = True }}
+
+ texMathToPandoc :: String -> Maybe [Inline]
+ texMathToPandoc cs = (maybeRight $ readTeX cs) >>= writePandoc DisplayInline
+
+maybeRight :: Either a b -> Maybe b
+maybeRight = either (const Nothing) Just
+
+inlineLaTeXCommand :: OrgParser String
+inlineLaTeXCommand = try $ do
+ rest <- getInput
+ case runParser rawLaTeXInline def "source" rest of
+ Right (RawInline _ cs) -> do
+ -- drop any trailing whitespace, those are not be part of the command as
+ -- far as org mode is concerned.
+ let cmdNoSpc = dropWhileEnd isSpace cs
+ let len = length cmdNoSpc
+ count len anyChar
+ return cmdNoSpc
+ _ -> mzero
+
+-- Taken from Data.OldList.
+dropWhileEnd :: (a -> Bool) -> [a] -> [a]
+dropWhileEnd p = foldr (\x xs -> if p x && null xs then [] else x : xs) []
+
+smart :: OrgParser (F Inlines)
+smart = do
+ getOption readerSmart >>= guard
+ doubleQuoted <|> singleQuoted <|>
+ choice (map (return <$>) [orgApostrophe, orgDash, orgEllipses])
+ where
+ orgDash = dash <* updatePositions '-'
+ orgEllipses = ellipses <* updatePositions '.'
+ orgApostrophe =
+ (char '\'' <|> char '\8217') <* updateLastPreCharPos
+ <* updateLastForbiddenCharPos
+ *> return (B.str "\x2019")
+
+singleQuoted :: OrgParser (F Inlines)
+singleQuoted = try $ do
+ singleQuoteStart
+ updatePositions '\''
+ withQuoteContext InSingleQuote $
+ fmap B.singleQuoted . trimInlinesF . mconcat <$>
+ many1Till inline (singleQuoteEnd <* updatePositions '\'')
+
+-- doubleQuoted will handle regular double-quoted sections, as well
+-- as dialogues with an open double-quote without a close double-quote
+-- in the same paragraph.
+doubleQuoted :: OrgParser (F Inlines)
+doubleQuoted = try $ do
+ doubleQuoteStart
+ updatePositions '"'
+ contents <- mconcat <$> many (try $ notFollowedBy doubleQuoteEnd >> inline)
+ (withQuoteContext InDoubleQuote $ (doubleQuoteEnd <* updateLastForbiddenCharPos) >> return
+ (fmap B.doubleQuoted . trimInlinesF $ contents))
+ <|> (return $ return (B.str "\8220") <> contents)
diff --git a/src/Text/Pandoc/Readers/Org/Parsing.hs b/src/Text/Pandoc/Readers/Org/Parsing.hs
index efe2ae25f..9a1420645 100644
--- a/src/Text/Pandoc/Readers/Org/Parsing.hs
+++ b/src/Text/Pandoc/Readers/Org/Parsing.hs
@@ -34,10 +34,14 @@ module Text.Pandoc.Readers.Org.Parsing
, blanklines
, newline
, parseFromString
+ , skipSpaces1
, inList
, withContext
, updateLastForbiddenCharPos
, updateLastPreCharPos
+ , orgArgKey
+ , orgArgWord
+ , orgArgWordChar
-- * Re-exports from Text.Pandoc.Parser
, ParserContext (..)
, many1Till
@@ -133,6 +137,10 @@ parseFromString parser str' = do
updateState $ \s -> s{ orgStateLastPreCharPos = oldLastPreCharPos }
return result
+-- | Skip one or more tab or space characters.
+skipSpaces1 :: OrgParser ()
+skipSpaces1 = skipMany1 spaceChar
+
-- | Like @Text.Parsec.Char.newline@, but causes additional state changes.
newline :: OrgParser Char
newline =
@@ -180,3 +188,14 @@ updateLastForbiddenCharPos = getPosition >>= \p ->
updateLastPreCharPos :: OrgParser ()
updateLastPreCharPos = getPosition >>= \p ->
updateState $ \s -> s{ orgStateLastPreCharPos = Just p}
+
+orgArgKey :: OrgParser String
+orgArgKey = try $
+ skipSpaces *> char ':'
+ *> many1 orgArgWordChar
+
+orgArgWord :: OrgParser String
+orgArgWord = many1 orgArgWordChar
+
+orgArgWordChar :: OrgParser Char
+orgArgWordChar = alphaNum <|> oneOf "-_"