    {- This module was generated from data in the Kate syntax highlighting file bibtex.xml, version 1.13,
       by  Jeroen Wijnhout (Jeroen.Wijnhout@kdemail.net) -}

    module Text.Highlighting.Kate.Syntax.Bibtex ( highlight, parseExpression, syntaxName, syntaxExtensions ) where
    import Text.Highlighting.Kate.Definitions
    import Text.Highlighting.Kate.Common
    import Text.ParserCombinators.Parsec
    import Data.List (nub)
    import Data.Map (fromList)
    import Data.Maybe (fromMaybe)

    -- | Full name of language.
    syntaxName :: String
    syntaxName = "BibTeX"

    -- | Filename extensions for this language.
    syntaxExtensions :: String
    syntaxExtensions = "*.bib"

    -- | Highlight source code using this syntax definition.
    highlight :: String -> Either String [SourceLine]
    highlight input =
      case runParser parseSource startingState "source" input of
        Left err     -> Left $ show err
        Right result -> Right result

    -- | Parse an expression using appropriate local context.
    parseExpression :: GenParser Char SyntaxState LabeledSource
    parseExpression = do
      st <- getState
      let oldLang = synStLanguage st
      setState $ st { synStLanguage = "BibTeX" }
      context <- currentContext <|> (pushContext "Normal" >> 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 [("BibTeX",["Normal"])], synStLanguage = "BibTeX", synStCurrentLine = "", synStCharsParsedInLine = 0, synStCaseSensitive = True, synStKeywordCaseSensitive = False, synStCaptures = []}

    parseSourceLine = manyTill parseExpressionInternal pEndLine

    pEndLine = do
      newline <|> (eof >> return '\n')
      context <- currentContext
      case context of
        "Normal" -> return ()
        "Entry" -> return ()
        "String" -> return ()
        _ -> return ()
      lineContents <- lookAhead wholeLine
      updateState $ \st -> st { synStCurrentLine = lineContents, synStCharsParsedInLine = 0 }

    withAttribute attr txt = do
      if null txt
         then fail "Parser matched no text"
         else return ()
      let style = fromMaybe "" $ lookup attr styles
      st <- getState
      let oldCharsParsed = synStCharsParsedInLine st
      updateState $ \st -> st { synStCharsParsedInLine = oldCharsParsed + length txt }
      return (nub [style, attr], txt)

    styles = [("Normal Text","Normal"),("Entry","Keyword"),("Command","Function"),("Field","DataType"),("Ref Key","Others"),("String","String"),("Char","Char")]

    parseExpressionInternal = do
      context <- currentContext
      parseRules context <|> (pDefault >>= withAttribute (fromMaybe "" $ lookup context defaultAttributes))

    defaultAttributes = [("Normal","Normal Text"),("Entry","Ref Key"),("String","String")]

    parseRules "Normal" =
      do (attr, result) <- (((pFirstNonSpace >> pRegExpr (compileRegex "([a-zA-Z]+)\\s*=") >>= withAttribute "Field"))
                            <|>
                            ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~" ["@article","@book","@booklet","@conference","@inbook","@incollection","@inproceedings","@manual","@mastersthesis","@misc","@phdthesis","@proceedings","@techreport","@unpublished","@collection","@patent"] >>= withAttribute "Entry") >>~ pushContext "Entry")
                            <|>
                            ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~" ["@string","@preamble","@comment"] >>= withAttribute "Command"))
                            <|>
                            ((pDetectChar False '{' >>= withAttribute "Normal Text"))
                            <|>
                            ((pDetectChar False '}' >>= withAttribute "Normal Text"))
                            <|>
                            ((pRegExpr (compileRegex "\\\\([a-zA-Z]+|.)") >>= withAttribute "Char"))
                            <|>
                            ((pDetectChar False '"' >>= withAttribute "String") >>~ pushContext "String"))
         return (attr, result)

    parseRules "Entry" =
      do (attr, result) <- (((pDetectChar False ',' >>= withAttribute "Normal Text") >>~ (popContext >> return ()))
                            <|>
                            ((pDetectChar False '{' >>= withAttribute "Normal Text"))
                            <|>
                            ((pDetectChar False '}' >>= withAttribute "Normal Text"))
                            <|>
                            ((pRegExpr (compileRegex "\\\\([a-zA-Z]+|.)") >>= withAttribute "Char"))
                            <|>
                            ((pDetectChar False '"' >>= withAttribute "String") >>~ (popContext >> return ())))
         return (attr, result)

    parseRules "String" =
      do (attr, result) <- (((pRegExpr (compileRegex "\\\\([a-zA-Z]+|.)") >>= withAttribute "Char"))
                            <|>
                            ((pDetectChar False '"' >>= withAttribute "String") >>~ (popContext >> return ())))
         return (attr, result)

    parseRules x = fail $ "Unknown context" ++ x