diff options
Diffstat (limited to 'src/Text/Pandoc/Readers')
| -rw-r--r-- | src/Text/Pandoc/Readers/Org/Blocks.hs | 70 |
1 files changed, 57 insertions, 13 deletions
diff --git a/src/Text/Pandoc/Readers/Org/Blocks.hs b/src/Text/Pandoc/Readers/Org/Blocks.hs index 0753b5deb..6fc12d84b 100644 --- a/src/Text/Pandoc/Readers/Org/Blocks.hs +++ b/src/Text/Pandoc/Readers/Org/Blocks.hs @@ -284,6 +284,11 @@ block = choice [ mempty <$ blanklines ] <?> "block" +-- | Parse a horizontal rule into a block element +horizontalRule :: Monad m => OrgParser m (F Blocks) +horizontalRule = return B.horizontalRule <$ try hline + + -- -- Block Attributes -- @@ -522,28 +527,70 @@ trailingResultsBlock = optionMaybe . try $ do block -- | Parse code block arguments --- TODO: We currently don't handle switches. codeHeaderArgs :: Monad m => OrgParser m ([String], [(String, String)]) codeHeaderArgs = try $ do language <- skipSpaces *> orgArgWord - _ <- skipSpaces *> (try $ switch `sepBy` (many1 spaceChar)) + (switchClasses, switchKv) <- switchesAsAttributes parameters <- manyTill blockOption newline let pandocLang = translateLang language + let classes = pandocLang : switchClasses return $ if hasRundocParameters parameters - then ( [ pandocLang, rundocBlockClass ] - , map toRundocAttrib (("language", language) : parameters) + then ( classes <> [ rundocBlockClass ] + , switchKv <> map toRundocAttrib (("language", language) : parameters) ) - else ([ pandocLang ], parameters) + else (classes, switchKv <> parameters) where hasRundocParameters = not . null -switch :: Monad m => OrgParser m (Char, Maybe String) -switch = try $ simpleSwitch <|> lineNumbersSwitch +switchesAsAttributes :: Monad m => OrgParser m ([String], [(String, String)]) +switchesAsAttributes = try $ do + switches <- skipSpaces *> (try $ switch `sepBy` (many1 spaceChar)) + return $ foldr addToAttr ([], []) switches where - simpleSwitch = (\c -> (c, Nothing)) <$> (oneOf "-+" *> letter) - lineNumbersSwitch = (\ls -> ('l', Just ls)) <$> - (string "-l \"" *> many1Till nonspaceChar (char '"')) + addToAttr :: (Char, Maybe String, SwitchPolarity) + -> ([String], [(String, String)]) + -> ([String], [(String, String)]) + addToAttr ('n', lineNum, pol) (cls, kv) = + let kv' = case lineNum of + Just num -> (("startFrom", num):kv) + Nothing -> kv + cls' = case pol of + SwitchPlus -> "continuedSourceBlock":cls + SwitchMinus -> cls + in ("numberLines":cls', kv') + addToAttr _ x = x + +-- | Whether a switch flag is specified with @+@ or @-@. +data SwitchPolarity = SwitchPlus | SwitchMinus + deriving (Show, Eq) + +-- | Parses a switch's polarity. +switchPolarity :: Monad m => OrgParser m SwitchPolarity +switchPolarity = (SwitchMinus <$ char '-') <|> (SwitchPlus <$ char '+') + +-- | Parses a source block switch option. +switch :: Monad m => OrgParser m (Char, Maybe String, SwitchPolarity) +switch = try $ lineNumberSwitch <|> labelSwitch <|> simpleSwitch + where + simpleSwitch = (\pol c -> (c, Nothing, pol)) <$> switchPolarity <*> letter + labelSwitch = genericSwitch 'l' $ + char '"' *> many1Till nonspaceChar (char '"') + +-- | Generic source block switch-option parser. +genericSwitch :: Monad m + => Char + -> OrgParser m String + -> OrgParser m (Char, Maybe String, SwitchPolarity) +genericSwitch c p = try $ do + polarity <- switchPolarity <* char c <* skipSpaces + arg <- optionMaybe p + return $ (c, arg, polarity) + +-- | Reads a line number switch option. The line number switch can be used with +-- example and source blocks. +lineNumberSwitch :: Monad m => OrgParser m (Char, Maybe String, SwitchPolarity) +lineNumberSwitch = genericSwitch 'n' (many digit) blockOption :: Monad m => OrgParser m (String, String) blockOption = try $ do @@ -558,9 +605,6 @@ orgParamValue = try $ *> many1 nonspaceChar <* skipSpaces -horizontalRule :: Monad m => OrgParser m (F Blocks) -horizontalRule = return B.horizontalRule <$ try hline - -- -- Drawers |