module Text.Highlighting.Kate.Syntax.Prolog ( highlight, parseExpression, syntaxName, syntaxExtensions ) where
import Text.Highlighting.Kate.Definitions
import Text.Highlighting.Kate.Common
import Text.ParserCombinators.Parsec
import Control.Monad (when)
import Data.Map (fromList)
import Data.Maybe (fromMaybe, maybeToList)
import qualified Data.Set as Set
syntaxName :: String
syntaxName = "Prolog"
syntaxExtensions :: String
syntaxExtensions = "*.prolog"
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 = "Prolog" }
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 [("Prolog",["normal"])], synStLanguage = "Prolog", synStCurrentLine = "", synStCharsParsedInLine = 0, synStPrevChar = '\n', synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
parseSourceLine = manyTill parseExpressionInternal pEndLine
pEndLine = do
newline <|> (eof >> return '\n')
context <- currentContext
case context of
"normal" -> return ()
"comment" -> (popContext >> return ())
"string" -> return ()
"string2" -> return ()
"comment region" -> return ()
_ -> return ()
lineContents <- lookAhead wholeLine
updateState $ \st -> st { synStCurrentLine = lineContents, synStCharsParsedInLine = 0, synStPrevChar = '\n' }
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 = [("Keyword","kw"),("Data Type","dt"),("Comment","co"),("Integer","dv"),("String","st"),("Variable","ot"),("Arithmetic","kw")]
parseExpressionInternal = do
context <- currentContext
parseRules context <|> (pDefault >>= withAttribute (fromMaybe "" $ lookup context defaultAttributes))
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_]*"
defaultAttributes = [("normal","Symbol"),("comment","Comment"),("string","String"),("string2","String"),("comment region","Comment")]
parseRules "normal" =
do (attr, result) <- (((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_keywordl >>= withAttribute "Keyword"))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_keywordu >>= withAttribute "Keyword"))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_arith >>= withAttribute "Arithmetic"))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_compiler >>= withAttribute "Keyword"))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_special >>= withAttribute "Keyword"))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_basetype >>= withAttribute "Data Type"))
<|>
((pRegExpr regex_'5bA'2dZ'5f'5d'5bA'2dZa'2dz0'2d9'5f'5d'2a >>= withAttribute "Variable"))
<|>
((pRegExpr regex_'5ba'2dz'5d'5bA'2dZa'2dz0'2d9'5f'5d'2a >>= withAttribute "Identifier"))
<|>
((pDetectChar False '%' >>= withAttribute "Comment") >>~ pushContext "comment")
<|>
((pDetect2Chars False '/' '*' >>= withAttribute "Comment") >>~ pushContext "comment region")
<|>
((pInt >>= withAttribute "Integer"))
<|>
((pDetectChar False '"' >>= withAttribute "String") >>~ pushContext "string")
<|>
((pDetectChar False '\'' >>= withAttribute "String") >>~ pushContext "string2")
<|>
((pAnyChar "~!^*()-+=[]|\\:;,./?&<>" >>= withAttribute "Symbol")))
return (attr, result)
parseRules "comment" =
pzero
parseRules "string" =
do (attr, result) <- ((pDetectChar False '"' >>= withAttribute "String") >>~ (popContext >> return ()))
return (attr, result)
parseRules "string2" =
do (attr, result) <- ((pDetectChar False '\'' >>= withAttribute "String") >>~ (popContext >> return ()))
return (attr, result)
parseRules "comment region" =
do (attr, result) <- ((pDetect2Chars False '*' '/' >>= withAttribute "Comment") >>~ (popContext >> return ()))
return (attr, result)
parseRules x = fail $ "Unknown context" ++ x