module Text.Highlighting.Kate.Syntax.LiterateCurry
(highlight, parseExpression, syntaxName, syntaxExtensions)
where
import Text.Highlighting.Kate.Types
import Text.Highlighting.Kate.Common
import qualified Text.Highlighting.Kate.Syntax.Curry
import Text.ParserCombinators.Parsec hiding (State)
import Control.Monad.State
import Data.Char (isSpace)
syntaxName :: String
syntaxName = "Literate Curry"
syntaxExtensions :: String
syntaxExtensions = "*.lcurry"
highlight :: String -> [SourceLine]
highlight input = evalState (mapM parseSourceLine $ lines input) startingState
parseSourceLine :: String -> State SyntaxState SourceLine
parseSourceLine = mkParseSourceLine (parseExpression Nothing)
parseExpression :: Maybe (String,String)
-> KateParser Token
parseExpression mbcontext = do
(lang,cont) <- maybe currentContext return mbcontext
result <- parseRules (lang,cont)
optional $ do eof
updateState $ \st -> st{ synStPrevChar = '\n' }
pEndLine
return result
startingState = SyntaxState {synStContexts = [("Literate Curry","Text")], synStLineNumber = 0, synStPrevChar = '\n', synStPrevNonspace = False, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
pEndLine = do
updateState $ \st -> st{ synStPrevNonspace = False }
context <- currentContext
contexts <- synStContexts `fmap` getState
if length contexts >= 2
then case context of
("Literate Curry","Text") -> return ()
("Literate Curry","Code") -> (popContext) >> pEndLine
("Literate Curry","normals") -> return ()
("Literate Curry","multiline") -> pushContext ("Literate Curry","lineend") >> return ()
("Literate Curry","lineend") -> return ()
("Literate Curry","restart") -> (popContext) >> pEndLine
_ -> return ()
else return ()
withAttribute attr txt = do
when (null txt) $ fail "Parser matched no text"
updateState $ \st -> st { synStPrevChar = last txt
, synStPrevNonspace = synStPrevNonspace st || not (all isSpace txt) }
return (attr, txt)
regex_'5c'7b'2d'5b'5e'23'5d = compileRegex "\\{-[^#]"
parseRules ("Literate Curry","Text") =
(((pColumn 0 >> pDetectChar False '>' >>= withAttribute OtherTok) >>~ pushContext ("Literate Curry","Code"))
<|>
((pColumn 0 >> pDetectChar False '<' >>= withAttribute OtherTok) >>~ pushContext ("Literate Curry","Code"))
<|>
((pString False "\\begin{code}" >>= withAttribute NormalTok) >>~ pushContext ("Literate Curry","normals"))
<|>
((pString False "\\begin{spec}" >>= withAttribute NormalTok) >>~ pushContext ("Literate Curry","normals"))
<|>
(currentContext >>= \x -> guard (x == ("Literate Curry","Text")) >> pDefault >>= withAttribute NormalTok))
parseRules ("Literate Curry","Code") =
(((pRegExpr regex_'5c'7b'2d'5b'5e'23'5d >>= withAttribute CommentTok) >>~ pushContext ("Literate Curry","multiline"))
<|>
((Text.Highlighting.Kate.Syntax.Curry.parseExpression (Just ("Curry",""))))
<|>
(currentContext >>= \x -> guard (x == ("Literate Curry","Code")) >> pDefault >>= withAttribute NormalTok))
parseRules ("Literate Curry","normals") =
(((pString False "\\end{code}" >>= withAttribute NormalTok) >>~ (popContext))
<|>
((pString False "\\end{spec}" >>= withAttribute NormalTok) >>~ (popContext))
<|>
((Text.Highlighting.Kate.Syntax.Curry.parseExpression (Just ("Curry",""))))
<|>
(currentContext >>= \x -> guard (x == ("Literate Curry","normals")) >> pDefault >>= withAttribute NormalTok))
parseRules ("Literate Curry","multiline") =
(((pDetect2Chars False '-' '}' >>= withAttribute CommentTok) >>~ (popContext))
<|>
(currentContext >>= \x -> guard (x == ("Literate Curry","multiline")) >> pDefault >>= withAttribute CommentTok))
parseRules ("Literate Curry","lineend") =
(((pColumn 0 >> pDetectChar False '>' >>= withAttribute OtherTok) >>~ pushContext ("Literate Curry","restart"))
<|>
((pColumn 0 >> pDetectChar False '<' >>= withAttribute OtherTok) >>~ pushContext ("Literate Curry","restart"))
<|>
(currentContext >>= \x -> guard (x == ("Literate Curry","lineend")) >> pDefault >>= withAttribute NormalTok))
parseRules ("Literate Curry","restart") =
(((pDetect2Chars False '-' '}' >>= withAttribute CommentTok) >>~ (popContext >> popContext >> popContext))
<|>
(currentContext >>= \x -> guard (x == ("Literate Curry","restart")) >> pDefault >>= withAttribute CommentTok))
parseRules ("Curry", _) = Text.Highlighting.Kate.Syntax.Curry.parseExpression Nothing
parseRules x = parseRules ("Literate Curry","Text") <|> fail ("Unknown context" ++ show x)