{- This module was generated from data in the Kate syntax
   highlighting file prolog.xml, version 1.05, by  -}

module Text.Highlighting.Kate.Syntax.Prolog
          (highlight, parseExpression, syntaxName, syntaxExtensions)
where
import Text.Highlighting.Kate.Types
import Text.Highlighting.Kate.Common
import Text.ParserCombinators.Parsec hiding (State)
import Control.Monad.State
import Data.Char (isSpace)
import qualified Data.Set as Set

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

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

-- | 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
  result <- parseRules (lang,cont)
  optional $ do eof
                updateState $ \st -> st{ synStPrevChar = '\n' }
                pEndLine
  return result

startingState = SyntaxState {synStContexts = [("Prolog","normal")], 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
      ("Prolog","normal") -> return ()
      ("Prolog","comment") -> (popContext) >> pEndLine
      ("Prolog","string") -> return ()
      ("Prolog","string2") -> return ()
      ("Prolog","comment region") -> 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)

list_keywordl = Set.fromList $ words $ "abstract align as and class clauses constants database determ domains elsedef endclass enddef erroneous facts failure global goal if ifdef ifndef implement include language multi nocopy nondeterm object or procedure protected predicates reference single static struct this"
list_keywordu = Set.fromList $ words $ "ABSTRACT ALIGN AS AND CLASS CLAUSES CONSTANTS DATABASE DETERM DOMAINS ELSEDEF ENDCLASS ENDDEF ERRONEOUS FACTS FAILURE GLOBAL GOAL IF IFDEF IFNDEF IMPLEMENT INCLUDE LANGUAGE MULTI NOCOPY NONDETERM OBJECT OR PROCEDURE PROTECTED PREDICATES REFERENCE SINGLE STATIC STRUCT THIS"
list_special = Set.fromList $ words $ "assert asserta assertz bound chain_inserta chain_insertafter chain_insertz chain_terms consult db_btrees db_chains fail findall format free msgrecv msgsend nl not readterm ref_term retract retractall save term_bin term_replace term_str trap write writef"
list_compiler = Set.fromList $ words $ "bgidriver bgifont check_determ code config diagnostics error errorlevel heap gstacksize nobreak nowarnings printermenu project"
list_arith = Set.fromList $ words $ "mod div abs exp ln log sqrt round trunc val cos sin tan arctan random randominit"
list_basetype = Set.fromList $ words $ "char real string symbol byte sbyte short ushort word integer unsigned dword long ulong binary ref"
list_keywords = Set.fromList $ words $ "true false"

regex_'5bA'2dZ'5f'5d'5bA'2dZa'2dz0'2d9'5f'5d'2a = compileRegex "[A-Z_][A-Za-z0-9_]*"
regex_'5ba'2dz'5d'5bA'2dZa'2dz0'2d9'5f'5d'2a = compileRegex "[a-z][A-Za-z0-9_]*"

parseRules ("Prolog","normal") =
  (((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_keywordl >>= withAttribute KeywordTok))
   <|>
   ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_keywordu >>= withAttribute KeywordTok))
   <|>
   ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_arith >>= withAttribute KeywordTok))
   <|>
   ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_compiler >>= withAttribute KeywordTok))
   <|>
   ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_special >>= withAttribute KeywordTok))
   <|>
   ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_basetype >>= withAttribute DataTypeTok))
   <|>
   ((pRegExpr regex_'5bA'2dZ'5f'5d'5bA'2dZa'2dz0'2d9'5f'5d'2a >>= withAttribute OtherTok))
   <|>
   ((pRegExpr regex_'5ba'2dz'5d'5bA'2dZa'2dz0'2d9'5f'5d'2a >>= withAttribute NormalTok))
   <|>
   ((pDetectChar False '%' >>= withAttribute CommentTok) >>~ pushContext ("Prolog","comment"))
   <|>
   ((pDetect2Chars False '/' '*' >>= withAttribute CommentTok) >>~ pushContext ("Prolog","comment region"))
   <|>
   ((pInt >>= withAttribute DecValTok))
   <|>
   ((pDetectChar False '"' >>= withAttribute StringTok) >>~ pushContext ("Prolog","string"))
   <|>
   ((pDetectChar False '\'' >>= withAttribute StringTok) >>~ pushContext ("Prolog","string2"))
   <|>
   ((pAnyChar "~!^*()-+=[]|\\:;,./?&<>" >>= withAttribute NormalTok))
   <|>
   (currentContext >>= \x -> guard (x == ("Prolog","normal")) >> pDefault >>= withAttribute NormalTok))

parseRules ("Prolog","comment") =
  (currentContext >>= \x -> guard (x == ("Prolog","comment")) >> pDefault >>= withAttribute CommentTok)

parseRules ("Prolog","string") =
  (((pHlCStringChar >>= withAttribute StringTok))
   <|>
   ((pDetectChar False '"' >>= withAttribute StringTok) >>~ (popContext))
   <|>
   (currentContext >>= \x -> guard (x == ("Prolog","string")) >> pDefault >>= withAttribute StringTok))

parseRules ("Prolog","string2") =
  (((pHlCChar >>= withAttribute StringTok))
   <|>
   ((pDetectChar False '\'' >>= withAttribute StringTok) >>~ (popContext))
   <|>
   (currentContext >>= \x -> guard (x == ("Prolog","string2")) >> pDefault >>= withAttribute StringTok))

parseRules ("Prolog","comment region") =
  (((pDetect2Chars False '*' '/' >>= withAttribute CommentTok) >>~ (popContext))
   <|>
   (currentContext >>= \x -> guard (x == ("Prolog","comment region")) >> pDefault >>= withAttribute CommentTok))


parseRules x = parseRules ("Prolog","normal") <|> fail ("Unknown context" ++ show x)