diff options
Diffstat (limited to 'src/Text/Pandoc')
| -rw-r--r-- | src/Text/Pandoc/Parsing.hs | 6 | ||||
| -rw-r--r-- | src/Text/Pandoc/Readers/RST.hs | 91 |
2 files changed, 87 insertions, 10 deletions
diff --git a/src/Text/Pandoc/Parsing.hs b/src/Text/Pandoc/Parsing.hs index 2f21e1253..2bc351db3 100644 --- a/src/Text/Pandoc/Parsing.hs +++ b/src/Text/Pandoc/Parsing.hs @@ -853,6 +853,11 @@ data ParserState = ParserState stateHasChapters :: Bool, -- ^ True if \chapter encountered stateMacros :: [Macro], -- ^ List of macros defined so far stateRstDefaultRole :: String, -- ^ Current rST default interpreted text role + stateRstCustomRoles :: M.Map String (String, Maybe String, Attr -> (String, Attr)), -- ^ Current rST custom text roles + -- Triple represents: 1) Base role, 2) Optional format (only for :raw: + -- roles), 3) Source language annotation for code (could be used to + -- annotate role classes too). + stateWarnings :: [String] -- ^ Warnings generated by the parser } @@ -915,6 +920,7 @@ defaultParserState = stateHasChapters = False, stateMacros = [], stateRstDefaultRole = "title-reference", + stateRstCustomRoles = M.empty, stateWarnings = []} getOption :: (ReaderOptions -> a) -> Parser s ParserState a diff --git a/src/Text/Pandoc/Readers/RST.hs b/src/Text/Pandoc/Readers/RST.hs index c12a1493a..a46a3a6c6 100644 --- a/src/Text/Pandoc/Readers/RST.hs +++ b/src/Text/Pandoc/Readers/RST.hs @@ -36,12 +36,13 @@ import Text.Pandoc.Builder (setMeta, fromList) import Text.Pandoc.Shared import Text.Pandoc.Parsing import Text.Pandoc.Options -import Control.Monad ( when, liftM, guard, mzero ) +import Control.Monad ( when, liftM, guard, mzero, mplus ) import Data.List ( findIndex, intersperse, intercalate, transpose, sort, deleteFirstsBy, isSuffixOf ) +import Data.Maybe (fromMaybe) import qualified Data.Map as M import Text.Printf ( printf ) -import Control.Applicative ((<$>), (<$), (<*), (*>)) +import Control.Applicative ((<$>), (<$), (<*), (*>), (<*>)) import Text.Pandoc.Builder (Inlines, Blocks, trimInlines, (<>)) import qualified Text.Pandoc.Builder as B import Data.Monoid (mconcat, mempty) @@ -530,7 +531,7 @@ directive' = do let body' = body ++ "\n\n" case label of "raw" -> return $ B.rawBlock (trim top) (stripTrailingNewlines body) - "role" -> return mempty + "role" -> addNewRole top $ map (\(k,v) -> (k, trim v)) fields "container" -> parseFromString parseBlocks body' "replace" -> B.para <$> -- consumed by substKey parseFromString (trimInlines . mconcat <$> many inline) @@ -591,7 +592,38 @@ directive' = do Nothing -> B.image src "" alt _ -> return mempty --- Can contain haracter codes as decimal numbers or +-- TODO: +-- - Silently ignores illegal fields +-- - Silently drops classes +-- - Only supports :format: fields with a single format for :raw: roles, +-- change Text.Pandoc.Definition.Format to fix +addNewRole :: String -> [(String, String)] -> RSTParser Blocks +addNewRole roleString fields = do + (role, parentRole) <- parseFromString inheritedRole roleString + customRoles <- stateRstCustomRoles <$> getState + baseRole <- case M.lookup parentRole customRoles of + Just (base, _, _) -> return base + Nothing -> return parentRole + + let fmt = if baseRole == "raw" then lookup "format" fields else Nothing + annotate = maybe id addLanguage $ + if baseRole == "code" + then lookup "language" fields + else Nothing + + updateState $ \s -> s { + stateRstCustomRoles = + M.insert role (baseRole, fmt, (,) parentRole . annotate) customRoles + } + + return $ B.singleton Null + where + addLanguage lang (ident, classes, keyValues) = + (ident, "sourceCode" : lang : classes, keyValues) + inheritedRole = + (,) <$> roleNameEndingIn (char '(') <*> roleNameEndingIn (char ')') + +-- Can contain character codes as decimal numbers or -- hexadecimal numbers, prefixed by 0x, x, \x, U+, u, or \u -- or as XML-style hexadecimal character entities, e.g. ᨫ -- or text, which is used as-is. Comments start with .. @@ -930,17 +962,56 @@ strong = B.strong . trimInlines . mconcat <$> -- Note, this doesn't precisely implement the complex rule in -- http://docutils.sourceforge.net/docs/ref/rst/restructuredtext.html#inline-markup-recognition-rules -- but it should be good enough for most purposes +-- +-- TODO: +-- - Classes are silently discarded in addNewRole +-- - Lacks sensible implementation for title-reference (which is the default) +-- - Allows direct use of the :raw: role, rST only allows inherited use. interpretedRole :: RSTParser Inlines interpretedRole = try $ do (role, contents) <- roleBefore <|> roleAfter - case role of - "sup" -> return $ B.superscript $ B.str contents - "sub" -> return $ B.subscript $ B.str contents - "math" -> return $ B.math contents - _ -> return $ B.str contents --unknown + renderRole contents Nothing role nullAttr + +renderRole :: String -> Maybe String -> String -> Attr -> RSTParser Inlines +renderRole contents fmt role attr = case role of + "sup" -> return $ B.superscript $ B.str contents + "superscript" -> return $ B.superscript $ B.str contents + "sub" -> return $ B.subscript $ B.str contents + "subscript" -> return $ B.subscript $ B.str contents + "emphasis" -> return $ B.emph $ B.str contents + "strong" -> return $ B.strong $ B.str contents + "rfc-reference" -> return $ rfcLink contents + "RFC" -> return $ rfcLink contents + "pep-reference" -> return $ pepLink contents + "PEP" -> return $ pepLink contents + "literal" -> return $ B.str contents + "math" -> return $ B.math contents + "title-reference" -> titleRef contents + "title" -> titleRef contents + "t" -> titleRef contents + "code" -> return $ B.codeWith attr contents + "raw" -> return $ B.rawInline (fromMaybe "" fmt) contents + custom -> do + customRole <- stateRstCustomRoles <$> getState + case M.lookup custom customRole of + Just (_, newFmt, inherit) -> let + fmtStr = fmt `mplus` newFmt + (newRole, newAttr) = inherit attr + in renderRole contents fmtStr newRole newAttr + Nothing -> return $ B.str contents -- Undefined role + where + titleRef ref = return $ B.str ref -- FIXME: Not a sensible behaviour + rfcLink rfcNo = B.link rfcUrl ("RFC " ++ rfcNo) $ B.str ("RFC " ++ rfcNo) + where rfcUrl = "http://www.faqs.org/rfcs/rfc" ++ rfcNo ++ ".html" + pepLink pepNo = B.link pepUrl ("PEP " ++ pepNo) $ B.str ("PEP " ++ pepNo) + where padNo = replicate (4 - length pepNo) '0' ++ pepNo + pepUrl = "http://http://www.python.org/dev/peps/pep-" ++ padNo ++ "/" + +roleNameEndingIn :: RSTParser Char -> RSTParser String +roleNameEndingIn end = many1Till (letter <|> char '-') end roleMarker :: RSTParser String -roleMarker = char ':' *> many1Till (letter <|> char '-') (char ':') +roleMarker = char ':' *> roleNameEndingIn (char ':') roleBefore :: RSTParser (String,String) roleBefore = try $ do |