module Text.Highlighting.Kate.Syntax.Texinfo
(highlight, parseExpression, syntaxName, syntaxExtensions)
where
import Text.Highlighting.Kate.Types
import Text.Highlighting.Kate.Common
import qualified Text.Highlighting.Kate.Syntax.Alert
import Text.ParserCombinators.Parsec hiding (State)
import Control.Monad.State
import Data.Char (isSpace)
syntaxName :: String
syntaxName = "Texinfo"
syntaxExtensions :: String
syntaxExtensions = "*.texi"
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 = [("Texinfo","Normal Text")], synStLineNumber = 0, synStPrevChar = '\n', synStPrevNonspace = False, synStContinuation = False, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
pEndLine = do
updateState $ \st -> st{ synStPrevNonspace = False }
context <- currentContext
contexts <- synStContexts `fmap` getState
st <- getState
if length contexts >= 2
then case context of
_ | synStContinuation st -> updateState $ \st -> st{ synStContinuation = False }
("Texinfo","Normal Text") -> return ()
("Texinfo","singleLineComment") -> (popContext) >> pEndLine
("Texinfo","multiLineComment") -> return ()
("Texinfo","nodeFolding") -> return ()
("Texinfo","folding") -> return ()
_ -> 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_'40c'28omment'29'3f'5cb = compileRegex True "@c(omment)?\\b"
regex_'40ignore'5cb = compileRegex True "@ignore\\b"
regex_'40node'5cb = compileRegex True "@node\\b"
regex_'40'28menu'7csmallexample'7ctable'7cmultitable'29'5cb = compileRegex True "@(menu|smallexample|table|multitable)\\b"
regex_'40'5b'5cw'5d'2b'28'5c'7b'28'5b'5cw'5d'2b'5b'5cs'5d'2a'29'2b'5c'7d'29'3f = compileRegex True "@[\\w]+(\\{([\\w]+[\\s]*)+\\})?"
regex_'40end_'28menu'7csmallexample'7ctable'7cmultitable'29'5cb = compileRegex True "@end (menu|smallexample|table|multitable)\\b"
parseRules ("Texinfo","Normal Text") =
(((pRegExpr regex_'40c'28omment'29'3f'5cb >>= withAttribute CommentTok) >>~ pushContext ("Texinfo","singleLineComment"))
<|>
((pRegExpr regex_'40ignore'5cb >>= withAttribute CommentTok) >>~ pushContext ("Texinfo","multiLineComment"))
<|>
((pRegExpr regex_'40node'5cb >>= withAttribute FunctionTok) >>~ pushContext ("Texinfo","nodeFolding"))
<|>
((pRegExpr regex_'40'28menu'7csmallexample'7ctable'7cmultitable'29'5cb >>= withAttribute FunctionTok) >>~ pushContext ("Texinfo","folding"))
<|>
((pRegExpr regex_'40'5b'5cw'5d'2b'28'5c'7b'28'5b'5cw'5d'2b'5b'5cs'5d'2a'29'2b'5c'7d'29'3f >>= withAttribute FunctionTok))
<|>
(currentContext >>= \x -> guard (x == ("Texinfo","Normal Text")) >> pDefault >>= withAttribute NormalTok))
parseRules ("Texinfo","singleLineComment") =
(((Text.Highlighting.Kate.Syntax.Alert.parseExpression (Just ("Alerts","")) >>= ((withAttribute CommentTok) . snd)))
<|>
(currentContext >>= \x -> guard (x == ("Texinfo","singleLineComment")) >> pDefault >>= withAttribute CommentTok))
parseRules ("Texinfo","multiLineComment") =
(((pString False "@end ignore" >>= withAttribute CommentTok) >>~ (popContext))
<|>
((Text.Highlighting.Kate.Syntax.Alert.parseExpression (Just ("Alerts","")) >>= ((withAttribute CommentTok) . snd)))
<|>
(currentContext >>= \x -> guard (x == ("Texinfo","multiLineComment")) >> pDefault >>= withAttribute CommentTok))
parseRules ("Texinfo","nodeFolding") =
(((lookAhead (pRegExpr regex_'40node'5cb) >> (popContext) >> currentContext >>= parseRules))
<|>
((parseRules ("Texinfo","Normal Text")))
<|>
(currentContext >>= \x -> guard (x == ("Texinfo","nodeFolding")) >> pDefault >>= withAttribute NormalTok))
parseRules ("Texinfo","folding") =
(((pRegExpr regex_'40end_'28menu'7csmallexample'7ctable'7cmultitable'29'5cb >>= withAttribute FunctionTok) >>~ (popContext))
<|>
((parseRules ("Texinfo","Normal Text")))
<|>
(currentContext >>= \x -> guard (x == ("Texinfo","folding")) >> pDefault >>= withAttribute NormalTok))
parseRules ("Alerts", _) = Text.Highlighting.Kate.Syntax.Alert.parseExpression Nothing
parseRules x = parseRules ("Texinfo","Normal Text") <|> fail ("Unknown context" ++ show x)