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authorAlbert Krewinkel <albert@zeitkraut.de>2016-05-25 22:50:51 +0200
committerAlbert Krewinkel <albert@zeitkraut.de>2016-05-25 23:21:40 +0200
commiteea6d6568f99eda689b93210a22692c7f79b4bbf (patch)
treebf65c0eb2bccfa5177514e0169b81dcdf0843baa
parent39e8b4276e6d88d5cbb943d04c866dde9bf6473c (diff)
Org reader: extract blocks parser to module
Block parsing code is moved to a separate module. This is part of the Org-mode reader cleanup effort.
-rw-r--r--pandoc.cabal1
-rw-r--r--src/Text/Pandoc/Readers/Org.hs853
-rw-r--r--src/Text/Pandoc/Readers/Org/Blocks.hs891
3 files changed, 901 insertions, 844 deletions
diff --git a/pandoc.cabal b/pandoc.cabal
index 7286bd890..7d7250a21 100644
--- a/pandoc.cabal
+++ b/pandoc.cabal
@@ -394,6 +394,7 @@ Library
Text.Pandoc.Readers.Odt.Arrows.State,
Text.Pandoc.Readers.Odt.Arrows.Utils,
Text.Pandoc.Readers.Org.BlockStarts,
+ Text.Pandoc.Readers.Org.Blocks,
Text.Pandoc.Readers.Org.Inlines,
Text.Pandoc.Readers.Org.ParserState,
Text.Pandoc.Readers.Org.Parsing,
diff --git a/src/Text/Pandoc/Readers/Org.hs b/src/Text/Pandoc/Readers/Org.hs
index 605d2220e..1042b5a21 100644
--- a/src/Text/Pandoc/Readers/Org.hs
+++ b/src/Text/Pandoc/Readers/Org.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE FlexibleContexts #-}
{-
Copyright (C) 2014-2016 Albert Krewinkel <tarleb+pandoc@moltkeplatz.de>
@@ -28,27 +27,15 @@ 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
+import Text.Pandoc.Readers.Org.Blocks ( blockList, meta )
+import Text.Pandoc.Readers.Org.Parsing ( OrgParser, readWithM )
+import Text.Pandoc.Readers.Org.ParserState ( OrgParserState (..) )
-import qualified Text.Pandoc.Builder as B
-import Text.Pandoc.Builder ( Inlines, Blocks )
import Text.Pandoc.Definition
-import Text.Pandoc.Compat.Monoid ((<>))
import Text.Pandoc.Error
import Text.Pandoc.Options
-import Text.Pandoc.Shared ( compactify', compactify'DL )
-import Control.Arrow ( first )
-import Control.Monad ( foldM, guard, mzero )
import Control.Monad.Reader ( runReader )
-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 )
-- | Parse org-mode string and return a Pandoc document.
@@ -58,105 +45,16 @@ readOrg :: ReaderOptions -- ^ Reader options
readOrg opts s = flip runReader def $ readWithM parseOrg def{ orgStateOptions = opts } (s ++ "\n\n")
--
--- Export Settings
---
-exportSetting :: OrgParser ()
-exportSetting = choice
- [ booleanSetting "^" setExportSubSuperscripts
- , ignoredSetting "'"
- , ignoredSetting "*"
- , ignoredSetting "-"
- , ignoredSetting ":"
- , ignoredSetting "<"
- , ignoredSetting "\\n"
- , ignoredSetting "arch"
- , ignoredSetting "author"
- , ignoredSetting "c"
- , ignoredSetting "creator"
- , complementableListSetting "d" setExportDrawers
- , ignoredSetting "date"
- , ignoredSetting "e"
- , ignoredSetting "email"
- , ignoredSetting "f"
- , ignoredSetting "H"
- , ignoredSetting "inline"
- , ignoredSetting "num"
- , ignoredSetting "p"
- , ignoredSetting "pri"
- , ignoredSetting "prop"
- , ignoredSetting "stat"
- , ignoredSetting "tags"
- , ignoredSetting "tasks"
- , ignoredSetting "tex"
- , ignoredSetting "timestamp"
- , ignoredSetting "title"
- , ignoredSetting "toc"
- , ignoredSetting "todo"
- , ignoredSetting "|"
- ] <?> "export setting"
-
-booleanSetting :: String -> ExportSettingSetter Bool -> OrgParser ()
-booleanSetting settingIdentifier setter = try $ do
- string settingIdentifier
- char ':'
- value <- elispBoolean
- updateState $ modifyExportSettings setter value
-
--- | Read an elisp boolean. Only NIL is treated as false, non-NIL values are
--- interpreted as true.
-elispBoolean :: OrgParser Bool
-elispBoolean = try $ do
- value <- many1 nonspaceChar
- return $ case map toLower value of
- "nil" -> False
- "{}" -> False
- "()" -> False
- _ -> True
-
--- | A list or a complement list (i.e. a list starting with `not`).
-complementableListSetting :: String
- -> ExportSettingSetter (Either [String] [String])
- -> OrgParser ()
-complementableListSetting settingIdentifier setter = try $ do
- _ <- string settingIdentifier <* char ':'
- value <- choice [ Left <$> complementStringList
- , Right <$> stringList
- , (\b -> if b then Left [] else Right []) <$> elispBoolean
- ]
- updateState $ modifyExportSettings setter value
- where
- -- Read a plain list of strings.
- stringList :: OrgParser [String]
- stringList = try $
- char '('
- *> sepBy elispString spaces
- <* char ')'
-
- -- Read an emacs lisp list specifying a complement set.
- complementStringList :: OrgParser [String]
- complementStringList = try $
- string "(not "
- *> sepBy elispString spaces
- <* char ')'
-
- elispString :: OrgParser String
- elispString = try $
- char '"'
- *> manyTill alphaNum (char '"')
-
-ignoredSetting :: String -> OrgParser ()
-ignoredSetting s = try (() <$ string s <* char ':' <* many1 nonspaceChar)
-
---
-- Parser
--
parseOrg :: OrgParser Pandoc
parseOrg = do
- blocks' <- parseBlocks
- st <- getState
- let meta = runF (orgStateMeta' st) st
- let removeUnwantedBlocks = dropCommentTrees . filter (/= Null)
- return $ Pandoc meta $ removeUnwantedBlocks (B.toList $ runF blocks' st)
+ blocks' <- blockList
+ meta' <- meta
+ return . Pandoc meta' $ removeUnwantedBlocks blocks'
+ where
+ removeUnwantedBlocks :: [Block] -> [Block]
+ removeUnwantedBlocks = dropCommentTrees . filter (/= Null)
-- | Drop COMMENT headers and the document tree below those headers.
dropCommentTrees :: [Block] -> [Block]
@@ -191,736 +89,3 @@ isHeaderLevelLowerEq n blk =
case blk of
(Header level _ _) -> n >= level
_ -> False
-
-
---
--- parsing blocks
---
-
-parseBlocks :: OrgParser (F Blocks)
-parseBlocks = mconcat <$> manyTill block eof
-
-block :: OrgParser (F Blocks)
-block = choice [ mempty <$ blanklines
- , table
- , orgBlock
- , figure
- , example
- , genericDrawer
- , specialLine
- , header
- , horizontalRule
- , list
- , latexFragment
- , noteBlock
- , paraOrPlain
- ] <?> "block"
-
-
---
--- Block Attributes
---
-
--- | Attributes that may be added to figures (like a name or caption).
-data BlockAttributes = BlockAttributes
- { blockAttrName :: Maybe String
- , blockAttrCaption :: Maybe (F Inlines)
- , blockAttrKeyValues :: [(String, String)]
- }
-
-stringyMetaAttribute :: (String -> Bool) -> OrgParser (String, String)
-stringyMetaAttribute attrCheck = try $ do
- metaLineStart
- attrName <- map toUpper <$> many1Till nonspaceChar (char ':')
- guard $ attrCheck attrName
- skipSpaces
- attrValue <- anyLine
- return (attrName, attrValue)
-
-blockAttributes :: OrgParser BlockAttributes
-blockAttributes = try $ do
- kv <- many (stringyMetaAttribute attrCheck)
- let caption = foldl' (appendValues "CAPTION") Nothing kv
- let kvAttrs = foldl' (appendValues "ATTR_HTML") Nothing kv
- let name = lookup "NAME" kv
- caption' <- maybe (return Nothing)
- (fmap Just . parseFromString parseInlines)
- caption
- kvAttrs' <- parseFromString keyValues . (++ "\n") $ fromMaybe mempty kvAttrs
- return $ BlockAttributes
- { blockAttrName = name
- , blockAttrCaption = caption'
- , blockAttrKeyValues = kvAttrs'
- }
- where
- attrCheck :: String -> Bool
- attrCheck attr =
- case attr of
- "NAME" -> True
- "CAPTION" -> True
- "ATTR_HTML" -> True
- _ -> False
-
- appendValues :: String -> Maybe String -> (String, String) -> Maybe String
- appendValues attrName accValue (key, value) =
- if key /= attrName
- then accValue
- else case accValue of
- Just acc -> Just $ acc ++ ' ':value
- Nothing -> Just value
-
-keyValues :: OrgParser [(String, String)]
-keyValues = try $
- manyTill ((,) <$> key <*> value) newline
- where
- key :: OrgParser String
- key = try $ skipSpaces *> char ':' *> many1 nonspaceChar
-
- value :: OrgParser String
- value = skipSpaces *> manyTill anyChar endOfValue
-
- endOfValue :: OrgParser ()
- endOfValue =
- lookAhead $ (() <$ try (many1 spaceChar <* key))
- <|> () <$ newline
-
-
---
--- Org Blocks (#+BEGIN_... / #+END_...)
---
-
-type BlockProperties = (Int, String) -- (Indentation, Block-Type)
-
-updateIndent :: BlockProperties -> Int -> BlockProperties
-updateIndent (_, blkType) indent = (indent, blkType)
-
-orgBlock :: OrgParser (F Blocks)
-orgBlock = try $ do
- blockAttrs <- blockAttributes
- blockProp@(_, blkType) <- blockHeaderStart
- ($ blockProp) $
- case blkType of
- "comment" -> withRaw' (const mempty)
- "html" -> withRaw' (return . (B.rawBlock blkType))
- "latex" -> withRaw' (return . (B.rawBlock blkType))
- "ascii" -> withRaw' (return . (B.rawBlock blkType))
- "example" -> withRaw' (return . exampleCode)
- "quote" -> withParsed (fmap B.blockQuote)
- "verse" -> verseBlock
- "src" -> codeBlock blockAttrs
- _ -> withParsed (fmap $ divWithClass blkType)
-
-blockHeaderStart :: OrgParser (Int, String)
-blockHeaderStart = try $ (,) <$> indentation <*> blockType
- where
- blockType = map toLower <$> (stringAnyCase "#+begin_" *> orgArgWord)
-
-indentation :: OrgParser Int
-indentation = try $ do
- tabStop <- getOption readerTabStop
- s <- many spaceChar
- return $ spaceLength tabStop s
-
-spaceLength :: Int -> String -> Int
-spaceLength tabStop s = (sum . map charLen) s
- where
- charLen ' ' = 1
- charLen '\t' = tabStop
- charLen _ = 0
-
-withRaw' :: (String -> F Blocks) -> BlockProperties -> OrgParser (F Blocks)
-withRaw' f blockProp = (ignHeaders *> (f <$> rawBlockContent blockProp))
-
-withParsed :: (F Blocks -> F Blocks) -> BlockProperties -> OrgParser (F Blocks)
-withParsed f blockProp = (ignHeaders *> (f <$> parsedBlockContent blockProp))
-
-ignHeaders :: OrgParser ()
-ignHeaders = (() <$ newline) <|> (() <$ anyLine)
-
-divWithClass :: String -> Blocks -> Blocks
-divWithClass cls = B.divWith ("", [cls], [])
-
-verseBlock :: BlockProperties -> OrgParser (F Blocks)
-verseBlock blkProp = try $ do
- ignHeaders
- content <- rawBlockContent blkProp
- fmap B.para . mconcat . intersperse (pure B.linebreak)
- <$> mapM (parseFromString parseInlines) (map (++ "\n") . lines $ content)
-
-exportsCode :: [(String, String)] -> Bool
-exportsCode attrs = not (("rundoc-exports", "none") `elem` attrs
- || ("rundoc-exports", "results") `elem` attrs)
-
-exportsResults :: [(String, String)] -> Bool
-exportsResults attrs = ("rundoc-exports", "results") `elem` attrs
- || ("rundoc-exports", "both") `elem` attrs
-
-followingResultsBlock :: OrgParser (Maybe (F Blocks))
-followingResultsBlock =
- optionMaybe (try $ blanklines *> stringAnyCase "#+RESULTS:"
- *> blankline
- *> block)
-
-codeBlock :: BlockAttributes -> BlockProperties -> OrgParser (F Blocks)
-codeBlock blockAttrs blkProp = do
- skipSpaces
- (classes, kv) <- codeHeaderArgs <|> (mempty <$ ignHeaders)
- leadingIndent <- lookAhead indentation
- content <- rawBlockContent (updateIndent blkProp leadingIndent)
- resultsContent <- followingResultsBlock
- let id' = fromMaybe mempty $ blockAttrName blockAttrs
- let includeCode = exportsCode kv
- let includeResults = exportsResults kv
- let codeBlck = B.codeBlockWith ( id', classes, kv ) content
- let labelledBlck = maybe (pure codeBlck)
- (labelDiv codeBlck)
- (blockAttrCaption blockAttrs)
- let resultBlck = fromMaybe mempty resultsContent
- return $ (if includeCode then labelledBlck else mempty)
- <> (if includeResults then resultBlck else mempty)
- where
- labelDiv blk value =
- B.divWith nullAttr <$> (mappend <$> labelledBlock value
- <*> pure blk)
- labelledBlock = fmap (B.plain . B.spanWith ("", ["label"], []))
-
-rawBlockContent :: BlockProperties -> OrgParser String
-rawBlockContent (indent, blockType) = try $
- unlines . map commaEscaped <$> manyTill indentedLine blockEnder
- where
- indentedLine = try $ ("" <$ blankline) <|> (indentWith indent *> anyLine)
- blockEnder = try $ skipSpaces *> stringAnyCase ("#+end_" <> blockType)
-
-parsedBlockContent :: BlockProperties -> OrgParser (F Blocks)
-parsedBlockContent blkProps = try $ do
- raw <- rawBlockContent blkProps
- parseFromString parseBlocks (raw ++ "\n")
-
--- indent by specified number of spaces (or equiv. tabs)
-indentWith :: Int -> OrgParser String
-indentWith num = do
- tabStop <- getOption readerTabStop
- if num < tabStop
- then count num (char ' ')
- else choice [ try (count num (char ' '))
- , try (char '\t' >> count (num - tabStop) (char ' ')) ]
-
-type SwitchOption = (Char, Maybe String)
-
--- | Parse code block arguments
--- TODO: We currently don't handle switches.
-codeHeaderArgs :: OrgParser ([String], [(String, String)])
-codeHeaderArgs = try $ do
- language <- skipSpaces *> orgArgWord
- _ <- skipSpaces *> (try $ switch `sepBy` (many1 spaceChar))
- parameters <- manyTill blockOption newline
- let pandocLang = translateLang language
- return $
- if hasRundocParameters parameters
- then ( [ pandocLang, rundocBlockClass ]
- , map toRundocAttrib (("language", language) : parameters)
- )
- else ([ pandocLang ], parameters)
- where
- hasRundocParameters = not . null
- toRundocAttrib = first ("rundoc-" ++)
-
-
-switch :: OrgParser SwitchOption
-switch = try $ simpleSwitch <|> lineNumbersSwitch
- where
- simpleSwitch = (\c -> (c, Nothing)) <$> (oneOf "-+" *> letter)
- lineNumbersSwitch = (\ls -> ('l', Just ls)) <$>
- (string "-l \"" *> many1Till nonspaceChar (char '"'))
-
-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
-
--- | Prefix used for Rundoc classes and arguments.
-rundocPrefix :: String
-rundocPrefix = "rundoc-"
-
--- | The class-name used to mark rundoc blocks.
-rundocBlockClass :: String
-rundocBlockClass = rundocPrefix ++ "block"
-
-blockOption :: OrgParser (String, String)
-blockOption = try $ do
- argKey <- orgArgKey
- paramValue <- option "yes" orgParamValue
- return (argKey, paramValue)
-
-orgParamValue :: OrgParser String
-orgParamValue = try $
- skipSpaces
- *> notFollowedBy (char ':' )
- *> many1 (noneOf "\t\n\r ")
- <* skipSpaces
-
-commaEscaped :: String -> String
-commaEscaped (',':cs@('*':_)) = cs
-commaEscaped (',':cs@('#':'+':_)) = cs
-commaEscaped cs = cs
-
-example :: OrgParser (F Blocks)
-example = try $ do
- return . return . exampleCode =<< unlines <$> many1 exampleLine
-
-exampleCode :: String -> Blocks
-exampleCode = B.codeBlockWith ("", ["example"], [])
-
-exampleLine :: OrgParser String
-exampleLine = try $ exampleLineStart *> anyLine
-
-horizontalRule :: OrgParser (F Blocks)
-horizontalRule = return B.horizontalRule <$ try hline
-
-
---
--- Drawers
---
-
--- | A generic drawer which has no special meaning for org-mode.
--- Whether or not this drawer is included in the output depends on the drawers
--- export setting.
-genericDrawer :: OrgParser (F Blocks)
-genericDrawer = try $ do
- name <- map toUpper <$> drawerStart
- content <- manyTill drawerLine (try drawerEnd)
- state <- getState
- -- Include drawer if it is explicitly included in or not explicitly excluded
- -- from the list of drawers that should be exported. PROPERTIES drawers are
- -- never exported.
- case (exportDrawers . orgStateExportSettings $ state) of
- _ | name == "PROPERTIES" -> return mempty
- Left names | name `elem` names -> return mempty
- Right names | name `notElem` names -> return mempty
- _ -> drawerDiv name <$> parseLines content
- where
- parseLines :: [String] -> OrgParser (F Blocks)
- parseLines = parseFromString parseBlocks . (++ "\n") . unlines
-
- drawerDiv :: String -> F Blocks -> F Blocks
- drawerDiv drawerName = fmap $ B.divWith (mempty, [drawerName, "drawer"], mempty)
-
-drawerLine :: OrgParser String
-drawerLine = anyLine
-
-drawerEnd :: OrgParser String
-drawerEnd = try $
- skipSpaces *> stringAnyCase ":END:" <* skipSpaces <* newline
-
--- | Read a :PROPERTIES: drawer and return the key/value pairs contained
--- within.
-propertiesDrawer :: OrgParser [(String, String)]
-propertiesDrawer = try $ do
- drawerType <- drawerStart
- guard $ map toUpper drawerType == "PROPERTIES"
- manyTill property (try drawerEnd)
- where
- property :: OrgParser (String, String)
- property = try $ (,) <$> key <*> value
-
- key :: OrgParser String
- key = try $ skipSpaces *> char ':' *> many1Till nonspaceChar (char ':')
-
- value :: OrgParser String
- value = try $ skipSpaces *> manyTill anyChar (try $ skipSpaces *> newline)
-
-keyValuesToAttr :: [(String, String)] -> Attr
-keyValuesToAttr kvs =
- let
- lowerKvs = map (\(k, v) -> (map toLower k, v)) kvs
- id' = fromMaybe mempty . lookup "custom_id" $ lowerKvs
- cls = fromMaybe mempty . lookup "class" $ lowerKvs
- kvs' = filter (flip notElem ["custom_id", "class"] . fst) lowerKvs
- in
- (id', words cls, kvs')
-
-
---
--- Figures
---
-
--- | Figures (Image on a line by itself, preceded by name and/or caption)
-figure :: OrgParser (F Blocks)
-figure = try $ do
- figAttrs <- blockAttributes
- src <- skipSpaces *> selfTarget <* skipSpaces <* newline
- guard . not . isNothing . blockAttrCaption $ figAttrs
- guard (isImageFilename src)
- let figName = fromMaybe mempty $ blockAttrName figAttrs
- let figCaption = fromMaybe mempty $ blockAttrCaption figAttrs
- let figKeyVals = blockAttrKeyValues figAttrs
- 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
-
--- 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
-metaLine :: OrgParser Blocks
-metaLine = mempty <$ metaLineStart <* (optionLine <|> declarationLine)
-
-commentLine :: OrgParser Blocks
-commentLine = commentLineStart *> anyLine *> pure mempty
-
-declarationLine :: OrgParser ()
-declarationLine = try $ do
- key <- metaKey
- inlinesF <- metaInlines
- updateState $ \st ->
- let meta' = B.setMeta <$> pure key <*> inlinesF <*> pure nullMeta
- in st { orgStateMeta' = orgStateMeta' st <> meta' }
- return ()
-
-metaInlines :: OrgParser (F MetaValue)
-metaInlines = fmap (MetaInlines . B.toList) <$> inlinesTillNewline
-
-metaKey :: OrgParser String
-metaKey = map toLower <$> many1 (noneOf ": \n\r")
- <* char ':'
- <* skipSpaces
-
-optionLine :: OrgParser ()
-optionLine = try $ do
- key <- metaKey
- case key of
- "link" -> parseLinkFormat >>= uncurry addLinkFormat
- "options" -> () <$ sepBy spaces exportSetting
- _ -> mzero
-
-parseLinkFormat :: OrgParser ((String, String -> String))
-parseLinkFormat = try $ do
- linkType <- (:) <$> letter <*> many (alphaNum <|> oneOf "-_") <* skipSpaces
- linkSubst <- parseFormat
- return (linkType, linkSubst)
-
--- | An ad-hoc, single-argument-only implementation of a printf-style format
--- parser.
-parseFormat :: OrgParser (String -> String)
-parseFormat = try $ do
- replacePlain <|> replaceUrl <|> justAppend
- where
- -- inefficient, but who cares
- replacePlain = try $ (\x -> concat . flip intersperse x)
- <$> sequence [tillSpecifier 's', rest]
- replaceUrl = try $ (\x -> concat . flip intersperse x . urlEncode)
- <$> sequence [tillSpecifier 'h', rest]
- justAppend = try $ (++) <$> rest
-
- rest = manyTill anyChar (eof <|> () <$ oneOf "\n\r")
- tillSpecifier c = manyTill (noneOf "\n\r") (try $ string ('%':c:""))
-
---
--- Headers
---
-
--- | Headers
-header :: OrgParser (F Blocks)
-header = try $ do
- level <- headerStart
- title <- manyTill inline (lookAhead $ optional headerTags <* newline)
- tags <- option [] headerTags
- newline
- propAttr <- option nullAttr (keyValuesToAttr <$> propertiesDrawer)
- inlines <- runF (tagTitle title tags) <$> getState
- attr <- registerHeader propAttr inlines
- return $ pure (B.headerWith attr level inlines)
- where
- tagTitle :: [F Inlines] -> [String] -> F Inlines
- tagTitle title tags = trimInlinesF . mconcat $ title <> map tagToInlineF tags
-
- tagToInlineF :: String -> F Inlines
- tagToInlineF t = return $ B.spanWith ("", ["tag"], [("data-tag-name", t)]) mempty
-
- headerTags :: OrgParser [String]
- headerTags = try $
- let tag = many1 (alphaNum <|> oneOf "@%#_") <* char ':'
- in skipSpaces
- *> char ':'
- *> many1 tag
- <* skipSpaces
-
-
---
--- Tables
---
-
-data OrgTableRow = OrgContentRow (F [Blocks])
- | OrgAlignRow [Alignment]
- | OrgHlineRow
-
--- OrgTable is strongly related to the pandoc table ADT. Using the same
--- (i.e. pandoc-global) ADT would mean that the reader would break if the
--- global structure was to be changed, which would be bad. The final table
--- should be generated using a builder function. Column widths aren't
--- implemented yet, so they are not tracked here.
-data OrgTable = OrgTable
- { orgTableAlignments :: [Alignment]
- , orgTableHeader :: [Blocks]
- , orgTableRows :: [[Blocks]]
- }
-
-table :: OrgParser (F Blocks)
-table = try $ do
- blockAttrs <- blockAttributes
- lookAhead tableStart
- do
- rows <- tableRows
- let caption = fromMaybe (return mempty) $ blockAttrCaption blockAttrs
- return $ (<$> caption) . orgToPandocTable . normalizeTable =<< rowsToTable rows
-
-orgToPandocTable :: OrgTable
- -> Inlines
- -> Blocks
-orgToPandocTable (OrgTable aligns heads lns) caption =
- B.table caption (zip aligns $ repeat 0) heads lns
-
-tableRows :: OrgParser [OrgTableRow]
-tableRows = try $ many (tableAlignRow <|> tableHline <|> tableContentRow)
-
-tableContentRow :: OrgParser OrgTableRow
-tableContentRow = try $
- OrgContentRow . sequence <$> (tableStart *> many1Till tableContentCell newline)
-
-tableContentCell :: OrgParser (F Blocks)
-tableContentCell = try $
- fmap B.plain . trimInlinesF . mconcat <$> manyTill inline endOfCell
-
-tableAlignRow :: OrgParser OrgTableRow
-tableAlignRow = try $ do
- tableStart
- cells <- many1Till tableAlignCell newline
- -- Empty rows are regular (i.e. content) rows, not alignment rows.
- guard $ any (/= AlignDefault) cells
- return $ OrgAlignRow cells
-
-tableAlignCell :: OrgParser Alignment
-tableAlignCell =
- choice [ try $ emptyCell *> return AlignDefault
- , try $ skipSpaces
- *> char '<'
- *> tableAlignFromChar
- <* many digit
- <* char '>'
- <* emptyCell
- ] <?> "alignment info"
- where emptyCell = try $ skipSpaces *> endOfCell
-
-tableAlignFromChar :: OrgParser Alignment
-tableAlignFromChar = try $
- choice [ char 'l' *> return AlignLeft
- , char 'c' *> return AlignCenter
- , char 'r' *> return AlignRight
- ]
-
-tableHline :: OrgParser OrgTableRow
-tableHline = try $
- OrgHlineRow <$ (tableStart *> char '-' *> anyLine)
-
-endOfCell :: OrgParser Char
-endOfCell = try $ char '|' <|> lookAhead newline
-
-rowsToTable :: [OrgTableRow]
- -> F OrgTable
-rowsToTable = foldM rowToContent emptyTable
- where emptyTable = OrgTable mempty mempty mempty
-
-normalizeTable :: OrgTable -> OrgTable
-normalizeTable (OrgTable aligns heads rows) = OrgTable aligns' heads rows
- where
- refRow = if heads /= mempty
- then heads
- else if rows == mempty then mempty else head rows
- cols = length refRow
- fillColumns base padding = take cols $ base ++ repeat padding
- aligns' = fillColumns aligns AlignDefault
-
--- One or more horizontal rules after the first content line mark the previous
--- line as a header. All other horizontal lines are discarded.
-rowToContent :: OrgTable
- -> OrgTableRow
- -> F OrgTable
-rowToContent orgTable row =
- case row of
- OrgHlineRow -> return singleRowPromotedToHeader
- OrgAlignRow as -> return . setAligns $ as
- OrgContentRow cs -> appendToBody cs
- where
- singleRowPromotedToHeader :: OrgTable
- singleRowPromotedToHeader = case orgTable of
- OrgTable{ orgTableHeader = [], orgTableRows = b:[] } ->
- orgTable{ orgTableHeader = b , orgTableRows = [] }
- _ -> orgTable
-
- setAligns :: [Alignment] -> OrgTable
- setAligns aligns = orgTable{ orgTableAlignments = aligns }
-
- appendToBody :: F [Blocks] -> F OrgTable
- appendToBody frow = do
- newRow <- frow
- let oldRows = orgTableRows orgTable
- -- NOTE: This is an inefficient O(n) operation. This should be changed
- -- if performance ever becomes a problem.
- return orgTable{ orgTableRows = oldRows ++ [newRow] }
-
-
---
--- LaTeX fragments
---
-latexFragment :: OrgParser (F Blocks)
-latexFragment = try $ do
- envName <- latexEnvStart
- content <- mconcat <$> manyTill anyLineNewline (latexEnd envName)
- return . return $ B.rawBlock "latex" (content `inLatexEnv` envName)
- where
- c `inLatexEnv` e = mconcat [ "\\begin{", e, "}\n"
- , c
- , "\\end{", e, "}\n"
- ]
-
-latexEnd :: String -> OrgParser ()
-latexEnd envName = try $
- () <$ skipSpaces
- <* string ("\\end{" ++ envName ++ "}")
- <* blankline
-
-
---
--- Footnote defintions
---
-noteBlock :: OrgParser (F Blocks)
-noteBlock = try $ do
- ref <- noteMarker <* skipSpaces
- content <- mconcat <$> blocksTillHeaderOrNote
- addToNotesTable (ref, content)
- return mempty
- where
- blocksTillHeaderOrNote =
- many1Till block (eof <|> () <$ lookAhead noteMarker
- <|> () <$ lookAhead headerStart)
-
--- Paragraphs or Plain text
-paraOrPlain :: OrgParser (F Blocks)
-paraOrPlain = try $ do
- ils <- parseInlines
- nl <- option False (newline *> return True)
- -- Read block as paragraph, except if we are in a list context and the block
- -- is directly followed by a list item, in which case the block is read as
- -- plain text.
- try (guard nl
- *> notFollowedBy (inList *> (() <$ orderedListStart <|> bulletListStart))
- *> return (B.para <$> ils))
- <|> (return (B.plain <$> ils))
-
-inlinesTillNewline :: OrgParser (F Inlines)
-inlinesTillNewline = trimInlinesF . mconcat <$> manyTill inline newline
-
-
---
--- list blocks
---
-
-list :: OrgParser (F Blocks)
-list = choice [ definitionList, bulletList, orderedList ] <?> "list"
-
-definitionList :: OrgParser (F Blocks)
-definitionList = try $ do n <- lookAhead (bulletListStart' Nothing)
- fmap B.definitionList . fmap compactify'DL . sequence
- <$> many1 (definitionListItem $ bulletListStart' (Just n))
-
-bulletList :: OrgParser (F Blocks)
-bulletList = try $ do n <- lookAhead (bulletListStart' Nothing)
- fmap B.bulletList . fmap compactify' . sequence
- <$> many1 (listItem (bulletListStart' $ Just n))
-
-orderedList :: OrgParser (F Blocks)
-orderedList = fmap B.orderedList . fmap compactify' . sequence
- <$> many1 (listItem orderedListStart)
-
-bulletListStart' :: Maybe Int -> OrgParser Int
--- returns length of bulletList prefix, inclusive of marker
-bulletListStart' Nothing = do ind <- length <$> many spaceChar
- oneOf (bullets $ ind == 0)
- skipSpaces1
- return (ind + 1)
-bulletListStart' (Just n) = do count (n-1) spaceChar
- oneOf (bullets $ n == 1)
- many1 spaceChar
- return n
-
--- 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]))
-definitionListItem parseMarkerGetLength = try $ do
- markerLength <- parseMarkerGetLength
- term <- manyTill (noneOf "\n\r") (try definitionMarker)
- line1 <- anyLineNewline
- blank <- option "" ("\n" <$ blankline)
- cont <- concat <$> many (listContinuation markerLength)
- term' <- parseFromString parseInlines term
- contents' <- parseFromString parseBlocks $ line1 ++ blank ++ cont
- return $ (,) <$> term' <*> fmap (:[]) contents'
- where
- definitionMarker =
- spaceChar *> string "::" <* (spaceChar <|> lookAhead newline)
-
-
--- parse raw text for one list item, excluding start marker and continuations
-listItem :: OrgParser Int
- -> OrgParser (F Blocks)
-listItem start = try . withContext ListItemState $ do
- markerLength <- try start
- firstLine <- anyLineNewline
- blank <- option "" ("\n" <$ blankline)
- rest <- concat <$> many (listContinuation markerLength)
- parseFromString parseBlocks $ firstLine ++ blank ++ rest
-
--- continuation of a list item - indented and separated by blankline or endline.
--- Note: nested lists are parsed as continuations.
-listContinuation :: Int
- -> OrgParser String
-listContinuation markerLength = try $
- notFollowedBy' blankline
- *> (mappend <$> (concat <$> many1 listLine)
- <*> many blankline)
- where listLine = try $ indentWith markerLength *> anyLineNewline
-
--- | Parse any line, include the final newline in the output.
-anyLineNewline :: OrgParser String
-anyLineNewline = (++ "\n") <$> anyLine
diff --git a/src/Text/Pandoc/Readers/Org/Blocks.hs b/src/Text/Pandoc/Readers/Org/Blocks.hs
new file mode 100644
index 000000000..b374acfe2
--- /dev/null
+++ b/src/Text/Pandoc/Readers/Org/Blocks.hs
@@ -0,0 +1,891 @@
+{-# LANGUAGE FlexibleContexts #-}
+{-
+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 block elements.
+-}
+module Text.Pandoc.Readers.Org.Blocks
+ ( blockList
+ , meta
+ ) 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
+
+import qualified Text.Pandoc.Builder as B
+import Text.Pandoc.Builder ( Inlines, Blocks )
+import Text.Pandoc.Definition
+import Text.Pandoc.Compat.Monoid ((<>))
+import Text.Pandoc.Options
+import Text.Pandoc.Shared ( compactify', compactify'DL )
+
+import Control.Arrow ( first )
+import Control.Monad ( foldM, guard, mzero )
+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 )
+
+
+--
+-- parsing blocks
+--
+
+-- | Get a list of blocks.
+blockList :: OrgParser [Block]
+blockList = do
+ blocks' <- blocks
+ st <- getState
+ return . B.toList $ runF blocks' st
+
+-- | Get the meta information safed in the state.
+meta :: OrgParser Meta
+meta = do
+ st <- getState
+ return $ runF (orgStateMeta' st) st
+
+blocks :: OrgParser (F Blocks)
+blocks = mconcat <$> manyTill block eof
+
+block :: OrgParser (F Blocks)
+block = choice [ mempty <$ blanklines
+ , table
+ , orgBlock
+ , figure
+ , example
+ , genericDrawer
+ , specialLine
+ , header
+ , horizontalRule
+ , list
+ , latexFragment
+ , noteBlock
+ , paraOrPlain
+ ] <?> "block"
+
+
+--
+-- Block Attributes
+--
+
+-- | Attributes that may be added to figures (like a name or caption).
+data BlockAttributes = BlockAttributes
+ { blockAttrName :: Maybe String
+ , blockAttrCaption :: Maybe (F Inlines)
+ , blockAttrKeyValues :: [(String, String)]
+ }
+
+stringyMetaAttribute :: (String -> Bool) -> OrgParser (String, String)
+stringyMetaAttribute attrCheck = try $ do
+ metaLineStart
+ attrName <- map toUpper <$> many1Till nonspaceChar (char ':')
+ guard $ attrCheck attrName
+ skipSpaces
+ attrValue <- anyLine
+ return (attrName, attrValue)
+
+blockAttributes :: OrgParser BlockAttributes
+blockAttributes = try $ do
+ kv <- many (stringyMetaAttribute attrCheck)
+ let caption = foldl' (appendValues "CAPTION") Nothing kv
+ let kvAttrs = foldl' (appendValues "ATTR_HTML") Nothing kv
+ let name = lookup "NAME" kv
+ caption' <- maybe (return Nothing)
+ (fmap Just . parseFromString parseInlines)
+ caption
+ kvAttrs' <- parseFromString keyValues . (++ "\n") $ fromMaybe mempty kvAttrs
+ return $ BlockAttributes
+ { blockAttrName = name
+ , blockAttrCaption = caption'
+ , blockAttrKeyValues = kvAttrs'
+ }
+ where
+ attrCheck :: String -> Bool
+ attrCheck attr =
+ case attr of
+ "NAME" -> True
+ "CAPTION" -> True
+ "ATTR_HTML" -> True
+ _ -> False
+
+ appendValues :: String -> Maybe String -> (String, String) -> Maybe String
+ appendValues attrName accValue (key, value) =
+ if key /= attrName
+ then accValue
+ else case accValue of
+ Just acc -> Just $ acc ++ ' ':value
+ Nothing -> Just value
+
+keyValues :: OrgParser [(String, String)]
+keyValues = try $
+ manyTill ((,) <$> key <*> value) newline
+ where
+ key :: OrgParser String
+ key = try $ skipSpaces *> char ':' *> many1 nonspaceChar
+
+ value :: OrgParser String
+ value = skipSpaces *> manyTill anyChar endOfValue
+
+ endOfValue :: OrgParser ()
+ endOfValue =
+ lookAhead $ (() <$ try (many1 spaceChar <* key))
+ <|> () <$ newline
+
+
+--
+-- Org Blocks (#+BEGIN_... / #+END_...)
+--
+
+type BlockProperties = (Int, String) -- (Indentation, Block-Type)
+
+updateIndent :: BlockProperties -> Int -> BlockProperties
+updateIndent (_, blkType) indent = (indent, blkType)
+
+orgBlock :: OrgParser (F Blocks)
+orgBlock = try $ do
+ blockAttrs <- blockAttributes
+ blockProp@(_, blkType) <- blockHeaderStart
+ ($ blockProp) $
+ case blkType of
+ "comment" -> withRaw' (const mempty)
+ "html" -> withRaw' (return . (B.rawBlock blkType))
+ "latex" -> withRaw' (return . (B.rawBlock blkType))
+ "ascii" -> withRaw' (return . (B.rawBlock blkType))
+ "example" -> withRaw' (return . exampleCode)
+ "quote" -> withParsed (fmap B.blockQuote)
+ "verse" -> verseBlock
+ "src" -> codeBlock blockAttrs
+ _ -> withParsed (fmap $ divWithClass blkType)
+
+blockHeaderStart :: OrgParser (Int, String)
+blockHeaderStart = try $ (,) <$> indentation <*> blockType
+ where
+ blockType = map toLower <$> (stringAnyCase "#+begin_" *> orgArgWord)
+
+indentation :: OrgParser Int
+indentation = try $ do
+ tabStop <- getOption readerTabStop
+ s <- many spaceChar
+ return $ spaceLength tabStop s
+
+spaceLength :: Int -> String -> Int
+spaceLength tabStop s = (sum . map charLen) s
+ where
+ charLen ' ' = 1
+ charLen '\t' = tabStop
+ charLen _ = 0
+
+withRaw' :: (String -> F Blocks) -> BlockProperties -> OrgParser (F Blocks)
+withRaw' f blockProp = (ignHeaders *> (f <$> rawBlockContent blockProp))
+
+withParsed :: (F Blocks -> F Blocks) -> BlockProperties -> OrgParser (F Blocks)
+withParsed f blockProp = (ignHeaders *> (f <$> parsedBlockContent blockProp))
+
+ignHeaders :: OrgParser ()
+ignHeaders = (() <$ newline) <|> (() <$ anyLine)
+
+divWithClass :: String -> Blocks -> Blocks
+divWithClass cls = B.divWith ("", [cls], [])
+
+verseBlock :: BlockProperties -> OrgParser (F Blocks)
+verseBlock blkProp = try $ do
+ ignHeaders
+ content <- rawBlockContent blkProp
+ fmap B.para . mconcat . intersperse (pure B.linebreak)
+ <$> mapM (parseFromString parseInlines) (map (++ "\n") . lines $ content)
+
+exportsCode :: [(String, String)] -> Bool
+exportsCode attrs = not (("rundoc-exports", "none") `elem` attrs
+ || ("rundoc-exports", "results") `elem` attrs)
+
+exportsResults :: [(String, String)] -> Bool
+exportsResults attrs = ("rundoc-exports", "results") `elem` attrs
+ || ("rundoc-exports", "both") `elem` attrs
+
+followingResultsBlock :: OrgParser (Maybe (F Blocks))
+followingResultsBlock =
+ optionMaybe (try $ blanklines *> stringAnyCase "#+RESULTS:"
+ *> blankline
+ *> block)
+
+codeBlock :: BlockAttributes -> BlockProperties -> OrgParser (F Blocks)
+codeBlock blockAttrs blkProp = do
+ skipSpaces
+ (classes, kv) <- codeHeaderArgs <|> (mempty <$ ignHeaders)
+ leadingIndent <- lookAhead indentation
+ content <- rawBlockContent (updateIndent blkProp leadingIndent)
+ resultsContent <- followingResultsBlock
+ let id' = fromMaybe mempty $ blockAttrName blockAttrs
+ let includeCode = exportsCode kv
+ let includeResults = exportsResults kv
+ let codeBlck = B.codeBlockWith ( id', classes, kv ) content
+ let labelledBlck = maybe (pure codeBlck)
+ (labelDiv codeBlck)
+ (blockAttrCaption blockAttrs)
+ let resultBlck = fromMaybe mempty resultsContent
+ return $ (if includeCode then labelledBlck else mempty)
+ <> (if includeResults then resultBlck else mempty)
+ where
+ labelDiv blk value =
+ B.divWith nullAttr <$> (mappend <$> labelledBlock value
+ <*> pure blk)
+ labelledBlock = fmap (B.plain . B.spanWith ("", ["label"], []))
+
+rawBlockContent :: BlockProperties -> OrgParser String
+rawBlockContent (indent, blockType) = try $
+ unlines . map commaEscaped <$> manyTill indentedLine blockEnder
+ where
+ indentedLine = try $ ("" <$ blankline) <|> (indentWith indent *> anyLine)
+ blockEnder = try $ skipSpaces *> stringAnyCase ("#+end_" <> blockType)
+
+parsedBlockContent :: BlockProperties -> OrgParser (F Blocks)
+parsedBlockContent blkProps = try $ do
+ raw <- rawBlockContent blkProps
+ parseFromString blocks (raw ++ "\n")
+
+-- indent by specified number of spaces (or equiv. tabs)
+indentWith :: Int -> OrgParser String
+indentWith num = do
+ tabStop <- getOption readerTabStop
+ if num < tabStop
+ then count num (char ' ')
+ else choice [ try (count num (char ' '))
+ , try (char '\t' >> count (num - tabStop) (char ' ')) ]
+
+type SwitchOption = (Char, Maybe String)
+
+-- | Parse code block arguments
+-- TODO: We currently don't handle switches.
+codeHeaderArgs :: OrgParser ([String], [(String, String)])
+codeHeaderArgs = try $ do
+ language <- skipSpaces *> orgArgWord
+ _ <- skipSpaces *> (try $ switch `sepBy` (many1 spaceChar))
+ parameters <- manyTill blockOption newline
+ let pandocLang = translateLang language
+ return $
+ if hasRundocParameters parameters
+ then ( [ pandocLang, rundocBlockClass ]
+ , map toRundocAttrib (("language", language) : parameters)
+ )
+ else ([ pandocLang ], parameters)
+ where
+ hasRundocParameters = not . null
+ toRundocAttrib = first ("rundoc-" ++)
+
+
+switch :: OrgParser SwitchOption
+switch = try $ simpleSwitch <|> lineNumbersSwitch
+ where
+ simpleSwitch = (\c -> (c, Nothing)) <$> (oneOf "-+" *> letter)
+ lineNumbersSwitch = (\ls -> ('l', Just ls)) <$>
+ (string "-l \"" *> many1Till nonspaceChar (char '"'))
+
+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
+
+-- | Prefix used for Rundoc classes and arguments.
+rundocPrefix :: String
+rundocPrefix = "rundoc-"
+
+-- | The class-name used to mark rundoc blocks.
+rundocBlockClass :: String
+rundocBlockClass = rundocPrefix ++ "block"
+
+blockOption :: OrgParser (String, String)
+blockOption = try $ do
+ argKey <- orgArgKey
+ paramValue <- option "yes" orgParamValue
+ return (argKey, paramValue)
+
+orgParamValue :: OrgParser String
+orgParamValue = try $
+ skipSpaces
+ *> notFollowedBy (char ':' )
+ *> many1 (noneOf "\t\n\r ")
+ <* skipSpaces
+
+commaEscaped :: String -> String
+commaEscaped (',':cs@('*':_)) = cs
+commaEscaped (',':cs@('#':'+':_)) = cs
+commaEscaped cs = cs
+
+example :: OrgParser (F Blocks)
+example = try $ do
+ return . return . exampleCode =<< unlines <$> many1 exampleLine
+
+exampleCode :: String -> Blocks
+exampleCode = B.codeBlockWith ("", ["example"], [])
+
+exampleLine :: OrgParser String
+exampleLine = try $ exampleLineStart *> anyLine
+
+horizontalRule :: OrgParser (F Blocks)
+horizontalRule = return B.horizontalRule <$ try hline
+
+
+--
+-- Drawers
+--
+
+-- | A generic drawer which has no special meaning for org-mode.
+-- Whether or not this drawer is included in the output depends on the drawers
+-- export setting.
+genericDrawer :: OrgParser (F Blocks)
+genericDrawer = try $ do
+ name <- map toUpper <$> drawerStart
+ content <- manyTill drawerLine (try drawerEnd)
+ state <- getState
+ -- Include drawer if it is explicitly included in or not explicitly excluded
+ -- from the list of drawers that should be exported. PROPERTIES drawers are
+ -- never exported.
+ case (exportDrawers . orgStateExportSettings $ state) of
+ _ | name == "PROPERTIES" -> return mempty
+ Left names | name `elem` names -> return mempty
+ Right names | name `notElem` names -> return mempty
+ _ -> drawerDiv name <$> parseLines content
+ where
+ parseLines :: [String] -> OrgParser (F Blocks)
+ parseLines = parseFromString blocks . (++ "\n") . unlines
+
+ drawerDiv :: String -> F Blocks -> F Blocks
+ drawerDiv drawerName = fmap $ B.divWith (mempty, [drawerName, "drawer"], mempty)
+
+drawerLine :: OrgParser String
+drawerLine = anyLine
+
+drawerEnd :: OrgParser String
+drawerEnd = try $
+ skipSpaces *> stringAnyCase ":END:" <* skipSpaces <* newline
+
+-- | Read a :PROPERTIES: drawer and return the key/value pairs contained
+-- within.
+propertiesDrawer :: OrgParser [(String, String)]
+propertiesDrawer = try $ do
+ drawerType <- drawerStart
+ guard $ map toUpper drawerType == "PROPERTIES"
+ manyTill property (try drawerEnd)
+ where
+ property :: OrgParser (String, String)
+ property = try $ (,) <$> key <*> value
+
+ key :: OrgParser String
+ key = try $ skipSpaces *> char ':' *> many1Till nonspaceChar (char ':')
+
+ value :: OrgParser String
+ value = try $ skipSpaces *> manyTill anyChar (try $ skipSpaces *> newline)
+
+keyValuesToAttr :: [(String, String)] -> Attr
+keyValuesToAttr kvs =
+ let
+ lowerKvs = map (\(k, v) -> (map toLower k, v)) kvs
+ id' = fromMaybe mempty . lookup "custom_id" $ lowerKvs
+ cls = fromMaybe mempty . lookup "class" $ lowerKvs
+ kvs' = filter (flip notElem ["custom_id", "class"] . fst) lowerKvs
+ in
+ (id', words cls, kvs')
+
+
+--
+-- Figures
+--
+
+-- | Figures (Image on a line by itself, preceded by name and/or caption)
+figure :: OrgParser (F Blocks)
+figure = try $ do
+ figAttrs <- blockAttributes
+ src <- skipSpaces *> selfTarget <* skipSpaces <* newline
+ guard . not . isNothing . blockAttrCaption $ figAttrs
+ guard (isImageFilename src)
+ let figName = fromMaybe mempty $ blockAttrName figAttrs
+ let figCaption = fromMaybe mempty $ blockAttrCaption figAttrs
+ let figKeyVals = blockAttrKeyValues figAttrs
+ 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
+
+-- 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
+metaLine :: OrgParser Blocks
+metaLine = mempty <$ metaLineStart <* (optionLine <|> declarationLine)
+
+commentLine :: OrgParser Blocks
+commentLine = commentLineStart *> anyLine *> pure mempty
+
+declarationLine :: OrgParser ()
+declarationLine = try $ do
+ key <- metaKey
+ inlinesF <- metaInlines
+ updateState $ \st ->
+ let meta' = B.setMeta <$> pure key <*> inlinesF <*> pure nullMeta
+ in st { orgStateMeta' = orgStateMeta' st <> meta' }
+ return ()
+
+metaInlines :: OrgParser (F MetaValue)
+metaInlines = fmap (MetaInlines . B.toList) <$> inlinesTillNewline
+
+metaKey :: OrgParser String
+metaKey = map toLower <$> many1 (noneOf ": \n\r")
+ <* char ':'
+ <* skipSpaces
+
+optionLine :: OrgParser ()
+optionLine = try $ do
+ key <- metaKey
+ case key of
+ "link" -> parseLinkFormat >>= uncurry addLinkFormat
+ "options" -> () <$ sepBy spaces exportSetting
+ _ -> mzero
+
+--
+-- Export Settings
+--
+
+-- | Read and process org-mode specific export options.
+exportSetting :: OrgParser ()
+exportSetting = choice
+ [ booleanSetting "^" setExportSubSuperscripts
+ , ignoredSetting "'"
+ , ignoredSetting "*"
+ , ignoredSetting "-"
+ , ignoredSetting ":"
+ , ignoredSetting "<"
+ , ignoredSetting "\\n"
+ , ignoredSetting "arch"
+ , ignoredSetting "author"
+ , ignoredSetting "c"
+ , ignoredSetting "creator"
+ , complementableListSetting "d" setExportDrawers
+ , ignoredSetting "date"
+ , ignoredSetting "e"
+ , ignoredSetting "email"
+ , ignoredSetting "f"
+ , ignoredSetting "H"
+ , ignoredSetting "inline"
+ , ignoredSetting "num"
+ , ignoredSetting "p"
+ , ignoredSetting "pri"
+ , ignoredSetting "prop"
+ , ignoredSetting "stat"
+ , ignoredSetting "tags"
+ , ignoredSetting "tasks"
+ , ignoredSetting "tex"
+ , ignoredSetting "timestamp"
+ , ignoredSetting "title"
+ , ignoredSetting "toc"
+ , ignoredSetting "todo"
+ , ignoredSetting "|"
+ ] <?> "export setting"
+
+booleanSetting :: String -> ExportSettingSetter Bool -> OrgParser ()
+booleanSetting settingIdentifier setter = try $ do
+ string settingIdentifier
+ char ':'
+ value <- elispBoolean
+ updateState $ modifyExportSettings setter value
+
+-- | Read an elisp boolean. Only NIL is treated as false, non-NIL values are
+-- interpreted as true.
+elispBoolean :: OrgParser Bool
+elispBoolean = try $ do
+ value <- many1 nonspaceChar
+ return $ case map toLower value of
+ "nil" -> False
+ "{}" -> False
+ "()" -> False
+ _ -> True
+
+-- | A list or a complement list (i.e. a list starting with `not`).
+complementableListSetting :: String
+ -> ExportSettingSetter (Either [String] [String])
+ -> OrgParser ()
+complementableListSetting settingIdentifier setter = try $ do
+ _ <- string settingIdentifier <* char ':'
+ value <- choice [ Left <$> complementStringList
+ , Right <$> stringList
+ , (\b -> if b then Left [] else Right []) <$> elispBoolean
+ ]
+ updateState $ modifyExportSettings setter value
+ where
+ -- Read a plain list of strings.
+ stringList :: OrgParser [String]
+ stringList = try $
+ char '('
+ *> sepBy elispString spaces
+ <* char ')'
+
+ -- Read an emacs lisp list specifying a complement set.
+ complementStringList :: OrgParser [String]
+ complementStringList = try $
+ string "(not "
+ *> sepBy elispString spaces
+ <* char ')'
+
+ elispString :: OrgParser String
+ elispString = try $
+ char '"'
+ *> manyTill alphaNum (char '"')
+
+ignoredSetting :: String -> OrgParser ()
+ignoredSetting s = try (() <$ string s <* char ':' <* many1 nonspaceChar)
+
+
+parseLinkFormat :: OrgParser ((String, String -> String))
+parseLinkFormat = try $ do
+ linkType <- (:) <$> letter <*> many (alphaNum <|> oneOf "-_") <* skipSpaces
+ linkSubst <- parseFormat
+ return (linkType, linkSubst)
+
+-- | An ad-hoc, single-argument-only implementation of a printf-style format
+-- parser.
+parseFormat :: OrgParser (String -> String)
+parseFormat = try $ do
+ replacePlain <|> replaceUrl <|> justAppend
+ where
+ -- inefficient, but who cares
+ replacePlain = try $ (\x -> concat . flip intersperse x)
+ <$> sequence [tillSpecifier 's', rest]
+ replaceUrl = try $ (\x -> concat . flip intersperse x . urlEncode)
+ <$> sequence [tillSpecifier 'h', rest]
+ justAppend = try $ (++) <$> rest
+
+ rest = manyTill anyChar (eof <|> () <$ oneOf "\n\r")
+ tillSpecifier c = manyTill (noneOf "\n\r") (try $ string ('%':c:""))
+
+--
+-- Headers
+--
+
+-- | Headers
+header :: OrgParser (F Blocks)
+header = try $ do
+ level <- headerStart
+ title <- manyTill inline (lookAhead $ optional headerTags <* newline)
+ tags <- option [] headerTags
+ newline
+ propAttr <- option nullAttr (keyValuesToAttr <$> propertiesDrawer)
+ inlines <- runF (tagTitle title tags) <$> getState
+ attr <- registerHeader propAttr inlines
+ return $ pure (B.headerWith attr level inlines)
+ where
+ tagTitle :: [F Inlines] -> [String] -> F Inlines
+ tagTitle title tags = trimInlinesF . mconcat $ title <> map tagToInlineF tags
+
+ tagToInlineF :: String -> F Inlines
+ tagToInlineF t = return $ B.spanWith ("", ["tag"], [("data-tag-name", t)]) mempty
+
+ headerTags :: OrgParser [String]
+ headerTags = try $
+ let tag = many1 (alphaNum <|> oneOf "@%#_") <* char ':'
+ in skipSpaces
+ *> char ':'
+ *> many1 tag
+ <* skipSpaces
+
+
+--
+-- Tables
+--
+
+data OrgTableRow = OrgContentRow (F [Blocks])
+ | OrgAlignRow [Alignment]
+ | OrgHlineRow
+
+-- OrgTable is strongly related to the pandoc table ADT. Using the same
+-- (i.e. pandoc-global) ADT would mean that the reader would break if the
+-- global structure was to be changed, which would be bad. The final table
+-- should be generated using a builder function. Column widths aren't
+-- implemented yet, so they are not tracked here.
+data OrgTable = OrgTable
+ { orgTableAlignments :: [Alignment]
+ , orgTableHeader :: [Blocks]
+ , orgTableRows :: [[Blocks]]
+ }
+
+table :: OrgParser (F Blocks)
+table = try $ do
+ blockAttrs <- blockAttributes
+ lookAhead tableStart
+ do
+ rows <- tableRows
+ let caption = fromMaybe (return mempty) $ blockAttrCaption blockAttrs
+ return $ (<$> caption) . orgToPandocTable . normalizeTable =<< rowsToTable rows
+
+orgToPandocTable :: OrgTable
+ -> Inlines
+ -> Blocks
+orgToPandocTable (OrgTable aligns heads lns) caption =
+ B.table caption (zip aligns $ repeat 0) heads lns
+
+tableRows :: OrgParser [OrgTableRow]
+tableRows = try $ many (tableAlignRow <|> tableHline <|> tableContentRow)
+
+tableContentRow :: OrgParser OrgTableRow
+tableContentRow = try $
+ OrgContentRow . sequence <$> (tableStart *> many1Till tableContentCell newline)
+
+tableContentCell :: OrgParser (F Blocks)
+tableContentCell = try $
+ fmap B.plain . trimInlinesF . mconcat <$> manyTill inline endOfCell
+
+tableAlignRow :: OrgParser OrgTableRow
+tableAlignRow = try $ do
+ tableStart
+ cells <- many1Till tableAlignCell newline
+ -- Empty rows are regular (i.e. content) rows, not alignment rows.
+ guard $ any (/= AlignDefault) cells
+ return $ OrgAlignRow cells
+
+tableAlignCell :: OrgParser Alignment
+tableAlignCell =
+ choice [ try $ emptyCell *> return AlignDefault
+ , try $ skipSpaces
+ *> char '<'
+ *> tableAlignFromChar
+ <* many digit
+ <* char '>'
+ <* emptyCell
+ ] <?> "alignment info"
+ where emptyCell = try $ skipSpaces *> endOfCell
+
+tableAlignFromChar :: OrgParser Alignment
+tableAlignFromChar = try $
+ choice [ char 'l' *> return AlignLeft
+ , char 'c' *> return AlignCenter
+ , char 'r' *> return AlignRight
+ ]
+
+tableHline :: OrgParser OrgTableRow
+tableHline = try $
+ OrgHlineRow <$ (tableStart *> char '-' *> anyLine)
+
+endOfCell :: OrgParser Char
+endOfCell = try $ char '|' <|> lookAhead newline
+
+rowsToTable :: [OrgTableRow]
+ -> F OrgTable
+rowsToTable = foldM rowToContent emptyTable
+ where emptyTable = OrgTable mempty mempty mempty
+
+normalizeTable :: OrgTable -> OrgTable
+normalizeTable (OrgTable aligns heads rows) = OrgTable aligns' heads rows
+ where
+ refRow = if heads /= mempty
+ then heads
+ else if rows == mempty then mempty else head rows
+ cols = length refRow
+ fillColumns base padding = take cols $ base ++ repeat padding
+ aligns' = fillColumns aligns AlignDefault
+
+-- One or more horizontal rules after the first content line mark the previous
+-- line as a header. All other horizontal lines are discarded.
+rowToContent :: OrgTable
+ -> OrgTableRow
+ -> F OrgTable
+rowToContent orgTable row =
+ case row of
+ OrgHlineRow -> return singleRowPromotedToHeader
+ OrgAlignRow as -> return . setAligns $ as
+ OrgContentRow cs -> appendToBody cs
+ where
+ singleRowPromotedToHeader :: OrgTable
+ singleRowPromotedToHeader = case orgTable of
+ OrgTable{ orgTableHeader = [], orgTableRows = b:[] } ->
+ orgTable{ orgTableHeader = b , orgTableRows = [] }
+ _ -> orgTable
+
+ setAligns :: [Alignment] -> OrgTable
+ setAligns aligns = orgTable{ orgTableAlignments = aligns }
+
+ appendToBody :: F [Blocks] -> F OrgTable
+ appendToBody frow = do
+ newRow <- frow
+ let oldRows = orgTableRows orgTable
+ -- NOTE: This is an inefficient O(n) operation. This should be changed
+ -- if performance ever becomes a problem.
+ return orgTable{ orgTableRows = oldRows ++ [newRow] }
+
+
+--
+-- LaTeX fragments
+--
+latexFragment :: OrgParser (F Blocks)
+latexFragment = try $ do
+ envName <- latexEnvStart
+ content <- mconcat <$> manyTill anyLineNewline (latexEnd envName)
+ return . return $ B.rawBlock "latex" (content `inLatexEnv` envName)
+ where
+ c `inLatexEnv` e = mconcat [ "\\begin{", e, "}\n"
+ , c
+ , "\\end{", e, "}\n"
+ ]
+
+latexEnd :: String -> OrgParser ()
+latexEnd envName = try $
+ () <$ skipSpaces
+ <* string ("\\end{" ++ envName ++ "}")
+ <* blankline
+
+
+--
+-- Footnote defintions
+--
+noteBlock :: OrgParser (F Blocks)
+noteBlock = try $ do
+ ref <- noteMarker <* skipSpaces
+ content <- mconcat <$> blocksTillHeaderOrNote
+ addToNotesTable (ref, content)
+ return mempty
+ where
+ blocksTillHeaderOrNote =
+ many1Till block (eof <|> () <$ lookAhead noteMarker
+ <|> () <$ lookAhead headerStart)
+
+-- Paragraphs or Plain text
+paraOrPlain :: OrgParser (F Blocks)
+paraOrPlain = try $ do
+ ils <- parseInlines
+ nl <- option False (newline *> return True)
+ -- Read block as paragraph, except if we are in a list context and the block
+ -- is directly followed by a list item, in which case the block is read as
+ -- plain text.
+ try (guard nl
+ *> notFollowedBy (inList *> (() <$ orderedListStart <|> bulletListStart))
+ *> return (B.para <$> ils))
+ <|> (return (B.plain <$> ils))
+
+inlinesTillNewline :: OrgParser (F Inlines)
+inlinesTillNewline = trimInlinesF . mconcat <$> manyTill inline newline
+
+
+--
+-- list blocks
+--
+
+list :: OrgParser (F Blocks)
+list = choice [ definitionList, bulletList, orderedList ] <?> "list"
+
+definitionList :: OrgParser (F Blocks)
+definitionList = try $ do n <- lookAhead (bulletListStart' Nothing)
+ fmap B.definitionList . fmap compactify'DL . sequence
+ <$> many1 (definitionListItem $ bulletListStart' (Just n))
+
+bulletList :: OrgParser (F Blocks)
+bulletList = try $ do n <- lookAhead (bulletListStart' Nothing)
+ fmap B.bulletList . fmap compactify' . sequence
+ <$> many1 (listItem (bulletListStart' $ Just n))
+
+orderedList :: OrgParser (F Blocks)
+orderedList = fmap B.orderedList . fmap compactify' . sequence
+ <$> many1 (listItem orderedListStart)
+
+bulletListStart' :: Maybe Int -> OrgParser Int
+-- returns length of bulletList prefix, inclusive of marker
+bulletListStart' Nothing = do ind <- length <$> many spaceChar
+ oneOf (bullets $ ind == 0)
+ skipSpaces1
+ return (ind + 1)
+bulletListStart' (Just n) = do count (n-1) spaceChar
+ oneOf (bullets $ n == 1)
+ many1 spaceChar
+ return n
+
+-- 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]))
+definitionListItem parseMarkerGetLength = try $ do
+ markerLength <- parseMarkerGetLength
+ term <- manyTill (noneOf "\n\r") (try definitionMarker)
+ line1 <- anyLineNewline
+ blank <- option "" ("\n" <$ blankline)
+ cont <- concat <$> many (listContinuation markerLength)
+ term' <- parseFromString parseInlines term
+ contents' <- parseFromString blocks $ line1 ++ blank ++ cont
+ return $ (,) <$> term' <*> fmap (:[]) contents'
+ where
+ definitionMarker =
+ spaceChar *> string "::" <* (spaceChar <|> lookAhead newline)
+
+
+-- parse raw text for one list item, excluding start marker and continuations
+listItem :: OrgParser Int
+ -> OrgParser (F Blocks)
+listItem start = try . withContext ListItemState $ do
+ markerLength <- try start
+ firstLine <- anyLineNewline
+ blank <- option "" ("\n" <$ blankline)
+ rest <- concat <$> many (listContinuation markerLength)
+ parseFromString blocks $ firstLine ++ blank ++ rest
+
+-- continuation of a list item - indented and separated by blankline or endline.
+-- Note: nested lists are parsed as continuations.
+listContinuation :: Int
+ -> OrgParser String
+listContinuation markerLength = try $
+ notFollowedBy' blankline
+ *> (mappend <$> (concat <$> many1 listLine)
+ <*> many blankline)
+ where listLine = try $ indentWith markerLength *> anyLineNewline
+
+-- | Parse any line, include the final newline in the output.
+anyLineNewline :: OrgParser String
+anyLineNewline = (++ "\n") <$> anyLine