module Text.Highlighting.Kate.Syntax.Texinfo ( highlight, parseExpression, syntaxName, syntaxExtensions ) where
import Text.Highlighting.Kate.Definitions
import Text.Highlighting.Kate.Common
import qualified Text.Highlighting.Kate.Syntax.Alert
import Text.ParserCombinators.Parsec
import Control.Monad (when)
import Data.Map (fromList)
import Data.Maybe (fromMaybe, maybeToList)
syntaxName :: String
syntaxName = "Texinfo"
syntaxExtensions :: String
syntaxExtensions = "*.texi"
highlight :: String -> Either String [SourceLine]
highlight input =
case runParser parseSource startingState "source" input of
Left err -> Left $ show err
Right result -> Right result
parseExpression :: GenParser Char SyntaxState LabeledSource
parseExpression = do
st <- getState
let oldLang = synStLanguage st
setState $ st { synStLanguage = "Texinfo" }
context <- currentContext <|> (pushContext "Normal Text" >> currentContext)
result <- parseRules context
updateState $ \st -> st { synStLanguage = oldLang }
return result
parseSource = do
lineContents <- lookAhead wholeLine
updateState $ \st -> st { synStCurrentLine = lineContents }
result <- manyTill parseSourceLine eof
return $ map normalizeHighlighting result
startingState = SyntaxState {synStContexts = fromList [("Texinfo",["Normal Text"])], synStLanguage = "Texinfo", synStCurrentLine = "", synStCharsParsedInLine = 0, synStPrevChar = '\n', synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
parseSourceLine = manyTill parseExpressionInternal pEndLine
pEndLine = do
lookAhead $ newline <|> (eof >> return '\n')
context <- currentContext
case context of
"Normal Text" -> return () >> pHandleEndLine
"singleLineComment" -> (popContext) >> pEndLine
"multiLineComment" -> return () >> pHandleEndLine
"nodeFolding" -> return () >> pHandleEndLine
"folding" -> return () >> pHandleEndLine
_ -> pHandleEndLine
withAttribute attr txt = do
when (null txt) $ fail "Parser matched no text"
let labs = attr : maybeToList (lookup attr styles)
st <- getState
let oldCharsParsed = synStCharsParsedInLine st
let prevchar = if null txt then '\n' else last txt
updateState $ \st -> st { synStCharsParsedInLine = oldCharsParsed + length txt, synStPrevChar = prevchar }
return (labs, txt)
styles = [("Comment","co"),("Command","fu")]
parseExpressionInternal = do
context <- currentContext
parseRules context <|> (pDefault >>= withAttribute (fromMaybe "" $ lookup context defaultAttributes))
regex_'40c'28omment'29'3f'5cb = compileRegex "@c(omment)?\\b"
regex_'40ignore'5cb = compileRegex "@ignore\\b"
regex_'40node'5cb = compileRegex "@node\\b"
regex_'40'28menu'7csmallexample'7ctable'7cmultitable'29'5cb = compileRegex "@(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 "@[\\w]+(\\{([\\w]+[\\s]*)+\\})?"
regex_'40end_'28menu'7csmallexample'7ctable'7cmultitable'29'5cb = compileRegex "@end (menu|smallexample|table|multitable)\\b"
defaultAttributes = [("Normal Text","Normal Text"),("singleLineComment","Comment"),("multiLineComment","Comment"),("nodeFolding","Normal Text"),("folding","Normal Text")]
parseRules "Normal Text" =
do (attr, result) <- (((pRegExpr regex_'40c'28omment'29'3f'5cb >>= withAttribute "Comment") >>~ pushContext "singleLineComment")
<|>
((pRegExpr regex_'40ignore'5cb >>= withAttribute "Comment") >>~ pushContext "multiLineComment")
<|>
((pRegExpr regex_'40node'5cb >>= withAttribute "Command") >>~ pushContext "nodeFolding")
<|>
((pRegExpr regex_'40'28menu'7csmallexample'7ctable'7cmultitable'29'5cb >>= withAttribute "Command") >>~ pushContext "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 "Command")))
return (attr, result)
parseRules "singleLineComment" =
do (attr, result) <- ((Text.Highlighting.Kate.Syntax.Alert.parseExpression))
return (attr, result)
parseRules "multiLineComment" =
do (attr, result) <- (((pString False "@end ignore" >>= withAttribute "Comment") >>~ (popContext))
<|>
((Text.Highlighting.Kate.Syntax.Alert.parseExpression)))
return (attr, result)
parseRules "nodeFolding" =
do (attr, result) <- (((lookAhead (pRegExpr regex_'40node'5cb) >> return ([],"") ) >>~ (popContext))
<|>
((parseRules "Normal Text")))
return (attr, result)
parseRules "folding" =
do (attr, result) <- (((pRegExpr regex_'40end_'28menu'7csmallexample'7ctable'7cmultitable'29'5cb >>= withAttribute "Command") >>~ (popContext))
<|>
((parseRules "Normal Text")))
return (attr, result)
parseRules x = fail $ "Unknown context" ++ x