{- This module was generated from data in the Kate syntax
   highlighting file lex.xml, version 1.01, by Jan Villat (jan.villat@net2000.ch) -}

module Text.Highlighting.Kate.Syntax.Lex
          (highlight, parseExpression, syntaxName, syntaxExtensions)
where
import Text.Highlighting.Kate.Types
import Text.Highlighting.Kate.Common
import qualified Text.Highlighting.Kate.Syntax.Cpp
import Text.ParserCombinators.Parsec hiding (State)
import Control.Monad.State
import Data.Char (isSpace)
import Data.Maybe (fromMaybe)

-- | Full name of language.
syntaxName :: String
syntaxName = "Lex/Flex"

-- | Filename extensions for this language.
syntaxExtensions :: String
syntaxExtensions = "*.l;*.lex;*.flex"

-- | Highlight source code using this syntax definition.
highlight :: String -> [SourceLine]
highlight input = evalState (mapM parseSourceLine $ lines input) startingState

parseSourceLine :: String -> State SyntaxState SourceLine
parseSourceLine = mkParseSourceLine parseExpression

-- | Parse an expression using appropriate local context.
parseExpression :: KateParser Token
parseExpression = do
  (lang,cont) <- currentContext
  let defAttr = fromMaybe NormalTok $ lookup (lang,cont) defaultAttributes
  result <- if lang == "Lex/Flex"
               then parseRules (lang,cont) <|>
                      (pDefault >>= withAttribute defAttr)
               else parseRules ("Lex/Flex","Pre Start")
  optional $ do eof
                updateState $ \st -> st{ synStPrevChar = '\n' }
                pEndLine
  return result

startingState = SyntaxState {synStContexts = [("Lex/Flex","Pre Start")], synStLineNumber = 0, synStPrevChar = '\n', synStPrevNonspace = False, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}

pEndLine = do
  updateState $ \st -> st{ synStPrevNonspace = False }
  context <- currentContext
  case context of
    ("Lex/Flex","Pre Start") -> return ()
    ("Lex/Flex","Definitions") -> return ()
    ("Lex/Flex","Rules") -> return ()
    ("Lex/Flex","User Code") -> return ()
    ("Lex/Flex","Percent Command") -> (popContext) >> pEndLine
    ("Lex/Flex","Comment") -> return ()
    ("Lex/Flex","Definition RegExpr") -> (popContext) >> pEndLine
    ("Lex/Flex","Rule RegExpr") -> (popContext) >> pEndLine
    ("Lex/Flex","RegExpr (") -> return ()
    ("Lex/Flex","RegExpr [") -> return ()
    ("Lex/Flex","RegExpr {") -> return ()
    ("Lex/Flex","RegExpr Q") -> return ()
    ("Lex/Flex","RegExpr Base") -> return ()
    ("Lex/Flex","Start Conditions Scope") -> return ()
    ("Lex/Flex","Action") -> (popContext) >> pEndLine
    ("Lex/Flex","Detect C") -> return ()
    ("Lex/Flex","Indented C") -> (popContext) >> pEndLine
    ("Lex/Flex","Lex C Bloc") -> return ()
    ("Lex/Flex","Lex Rule C Bloc") -> return ()
    ("Lex/Flex","Normal C Bloc") -> return ()
    ("Lex/Flex","Action C") -> (popContext) >> pEndLine
    _ -> 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_'2e = compileRegex "."
regex_'5bA'2dZa'2dz'5f'5d'5cw'2a'5cs'2b = compileRegex "[A-Za-z_]\\w*\\s+"
regex_'5cS = compileRegex "\\S"
regex_'2e'2a = compileRegex ".*"
regex_'5c'7b'24 = compileRegex "\\{$"
regex_'5cs'2b = compileRegex "\\s+"
regex_'5c'5c'2e = compileRegex "\\\\."
regex_'5cs'2a'5c'7d = compileRegex "\\s*\\}"
regex_'5cs'2a = compileRegex "\\s*"
regex_'5c'7c'5cs'2a'24 = compileRegex "\\|\\s*$"
regex_'5cs = compileRegex "\\s"

defaultAttributes = [(("Lex/Flex","Pre Start"),NormalTok),(("Lex/Flex","Definitions"),NormalTok),(("Lex/Flex","Rules"),NormalTok),(("Lex/Flex","User Code"),NormalTok),(("Lex/Flex","Percent Command"),KeywordTok),(("Lex/Flex","Comment"),CommentTok),(("Lex/Flex","Definition RegExpr"),StringTok),(("Lex/Flex","Rule RegExpr"),StringTok),(("Lex/Flex","RegExpr ("),StringTok),(("Lex/Flex","RegExpr ["),StringTok),(("Lex/Flex","RegExpr {"),StringTok),(("Lex/Flex","RegExpr Q"),StringTok),(("Lex/Flex","RegExpr Base"),StringTok),(("Lex/Flex","Start Conditions Scope"),NormalTok),(("Lex/Flex","Action"),NormalTok),(("Lex/Flex","Detect C"),NormalTok),(("Lex/Flex","Indented C"),NormalTok),(("Lex/Flex","Lex C Bloc"),NormalTok),(("Lex/Flex","Lex Rule C Bloc"),NormalTok),(("Lex/Flex","Normal C Bloc"),NormalTok),(("Lex/Flex","Action C"),NormalTok)]

parseRules ("Lex/Flex","Pre Start") =
  ((lookAhead (pRegExpr regex_'2e) >> pushContext ("Lex/Flex","Definitions") >> currentContext >>= parseRules))

parseRules ("Lex/Flex","Definitions") =
  (((parseRules ("Lex/Flex","Detect C")))
   <|>
   ((pDetect2Chars False '%' '%' >>= withAttribute BaseNTok) >>~ pushContext ("Lex/Flex","Rules"))
   <|>
   ((pDetectChar False '%' >>= withAttribute KeywordTok) >>~ pushContext ("Lex/Flex","Percent Command"))
   <|>
   ((pColumn 0 >> pDetect2Chars False '/' '*' >>= withAttribute CommentTok) >>~ pushContext ("Lex/Flex","Comment"))
   <|>
   ((pColumn 0 >> pRegExpr regex_'5bA'2dZa'2dz'5f'5d'5cw'2a'5cs'2b >>= withAttribute DataTypeTok) >>~ pushContext ("Lex/Flex","Definition RegExpr")))

parseRules ("Lex/Flex","Rules") =
  (((parseRules ("Lex/Flex","Detect C")))
   <|>
   ((pDetect2Chars False '%' '%' >>= withAttribute BaseNTok) >>~ pushContext ("Lex/Flex","User Code"))
   <|>
   (pushContext ("Lex/Flex","Rule RegExpr") >> currentContext >>= parseRules))

parseRules ("Lex/Flex","User Code") =
  ((Text.Highlighting.Kate.Syntax.Cpp.parseExpression))

parseRules ("Lex/Flex","Percent Command") =
  pzero

parseRules ("Lex/Flex","Comment") =
  ((pDetect2Chars False '*' '/' >>= withAttribute CommentTok) >>~ (popContext))

parseRules ("Lex/Flex","Definition RegExpr") =
  (((parseRules ("Lex/Flex","RegExpr Base")))
   <|>
   ((pRegExpr regex_'5cS >>= withAttribute StringTok))
   <|>
   ((pRegExpr regex_'2e'2a >>= withAttribute AlertTok)))

parseRules ("Lex/Flex","Rule RegExpr") =
  (((pRegExpr regex_'5c'7b'24 >>= withAttribute BaseNTok) >>~ pushContext ("Lex/Flex","Start Conditions Scope"))
   <|>
   ((parseRules ("Lex/Flex","RegExpr Base")))
   <|>
   ((pRegExpr regex_'5cS >>= withAttribute StringTok))
   <|>
   ((pRegExpr regex_'5cs'2b >>= withAttribute NormalTok) >>~ pushContext ("Lex/Flex","Action")))

parseRules ("Lex/Flex","RegExpr (") =
  (((parseRules ("Lex/Flex","RegExpr Base")))
   <|>
   ((pDetectChar False ')' >>= withAttribute StringTok) >>~ (popContext))
   <|>
   ((pRegExpr regex_'2e >>= withAttribute StringTok)))

parseRules ("Lex/Flex","RegExpr [") =
  (((pRegExpr regex_'5c'5c'2e >>= withAttribute StringTok))
   <|>
   ((pDetectChar False ']' >>= withAttribute StringTok) >>~ (popContext))
   <|>
   ((pRegExpr regex_'2e >>= withAttribute StringTok)))

parseRules ("Lex/Flex","RegExpr {") =
  (((pRegExpr regex_'5c'5c'2e >>= withAttribute StringTok))
   <|>
   ((pDetectChar False '}' >>= withAttribute StringTok) >>~ (popContext))
   <|>
   ((pRegExpr regex_'2e >>= withAttribute StringTok)))

parseRules ("Lex/Flex","RegExpr Q") =
  (((pRegExpr regex_'5c'5c'2e >>= withAttribute StringTok))
   <|>
   ((pDetectChar False '"' >>= withAttribute StringTok) >>~ (popContext))
   <|>
   ((pRegExpr regex_'2e >>= withAttribute StringTok)))

parseRules ("Lex/Flex","RegExpr Base") =
  (((pRegExpr regex_'5c'5c'2e >>= withAttribute StringTok))
   <|>
   ((pDetectChar False '(' >>= withAttribute StringTok) >>~ pushContext ("Lex/Flex","RegExpr ("))
   <|>
   ((pDetectChar False '[' >>= withAttribute StringTok) >>~ pushContext ("Lex/Flex","RegExpr ["))
   <|>
   ((pDetectChar False '{' >>= withAttribute StringTok) >>~ pushContext ("Lex/Flex","RegExpr {"))
   <|>
   ((pDetectChar False '"' >>= withAttribute StringTok) >>~ pushContext ("Lex/Flex","RegExpr Q")))

parseRules ("Lex/Flex","Start Conditions Scope") =
  (((pRegExpr regex_'5cs'2a'5c'7d >>= withAttribute BaseNTok) >>~ (popContext))
   <|>
   ((pRegExpr regex_'5cs'2a >>= withAttribute NormalTok) >>~ pushContext ("Lex/Flex","Rule RegExpr"))
   <|>
   (pushContext ("Lex/Flex","Rule RegExpr") >> currentContext >>= parseRules))

parseRules ("Lex/Flex","Action") =
  (((pRegExpr regex_'5c'7c'5cs'2a'24 >>= withAttribute KeywordTok))
   <|>
   ((pDetect2Chars False '%' '{' >>= withAttribute BaseNTok) >>~ pushContext ("Lex/Flex","Lex Rule C Bloc"))
   <|>
   (pushContext ("Lex/Flex","Action C") >> currentContext >>= parseRules))

parseRules ("Lex/Flex","Detect C") =
  (((pColumn 0 >> pRegExpr regex_'5cs >>= withAttribute NormalTok) >>~ pushContext ("Lex/Flex","Indented C"))
   <|>
   ((pColumn 0 >> pDetect2Chars False '%' '{' >>= withAttribute BaseNTok) >>~ pushContext ("Lex/Flex","Lex C Bloc")))

parseRules ("Lex/Flex","Indented C") =
  ((Text.Highlighting.Kate.Syntax.Cpp.parseExpression))

parseRules ("Lex/Flex","Lex C Bloc") =
  (((pColumn 0 >> pDetect2Chars False '%' '}' >>= withAttribute BaseNTok) >>~ (popContext))
   <|>
   ((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))

parseRules ("Lex/Flex","Lex Rule C Bloc") =
  (((pDetect2Chars False '%' '}' >>= withAttribute BaseNTok) >>~ (popContext))
   <|>
   ((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))

parseRules ("Lex/Flex","Normal C Bloc") =
  (((pDetectChar False '{' >>= withAttribute NormalTok) >>~ pushContext ("Lex/Flex","Normal C Bloc"))
   <|>
   ((pDetectChar False '}' >>= withAttribute NormalTok) >>~ (popContext))
   <|>
   ((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))

parseRules ("Lex/Flex","Action C") =
  (((pDetectChar False '{' >>= withAttribute NormalTok) >>~ pushContext ("Lex/Flex","Normal C Bloc"))
   <|>
   ((pDetectChar False '}' >>= withAttribute AlertTok))
   <|>
   ((Text.Highlighting.Kate.Syntax.Cpp.parseExpression)))

parseRules ("C++", _) = Text.Highlighting.Kate.Syntax.Cpp.parseExpression

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