module Text.Highlighting.Kate.Syntax.Asn1
(highlight, parseExpression, syntaxName, syntaxExtensions)
where
import Text.Highlighting.Kate.Types
import Text.Highlighting.Kate.Common
import Text.ParserCombinators.Parsec hiding (State)
import Data.Map (fromList)
import Control.Monad.State
import Data.Char (isSpace)
import Data.Maybe (fromMaybe)
import qualified Data.Set as Set
syntaxName :: String
syntaxName = "ASN.1"
syntaxExtensions :: String
syntaxExtensions = "*.asn*.asn1"
highlight :: String -> [SourceLine]
highlight input = evalState (mapM parseSourceLine $ lines input) startingState
parseSourceLine :: String -> State SyntaxState SourceLine
parseSourceLine = mkParseSourceLine parseExpressionInternal pEndLine
parseExpression :: KateParser Token
parseExpression = do
st <- getState
let oldLang = synStLanguage st
setState $ st { synStLanguage = "ASN.1" }
context <- currentContext <|> (pushContext "Normal Text" >> currentContext)
result <- parseRules context
optional $ eof >> pEndLine
updateState $ \st -> st { synStLanguage = oldLang }
return result
startingState = SyntaxState {synStContexts = fromList [("ASN.1",["Normal Text"])], synStLanguage = "ASN.1", synStLineNumber = 0, synStPrevChar = '\n', synStPrevNonspace = False, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
pEndLine = do
updateState $ \st -> st{ synStPrevNonspace = False }
context <- currentContext
case context of
"Normal Text" -> return ()
"Comment" -> (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)
parseExpressionInternal = do
context <- currentContext
parseRules context <|> (pDefault >>= withAttribute (fromMaybe NormalTok $ lookup context defaultAttributes))
list_keywords = Set.fromList $ words $ "DEFINITIONS BEGIN END EXPORTS IMPORTS FROM APPLICATION PRIVATE UNIVERSAL DEFAULT OPTIONAL FALSE TRUE"
list_types = Set.fromList $ words $ "BOOLEAN INTEGER OCTET STRING NULL REAL ENUMERATED SEQUENCE SET CHOICE OF VisibleString StringStore"
defaultAttributes = [("Normal Text",NormalTok),("Comment",CommentTok)]
parseRules "Normal Text" =
(((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_keywords >>= withAttribute KeywordTok))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_types >>= withAttribute DataTypeTok))
<|>
((pDetect2Chars False '-' '-' >>= withAttribute CommentTok) >>~ pushContext "Comment"))
parseRules "Comment" =
pzero
parseRules "" = parseRules "Normal Text"
parseRules x = fail $ "Unknown context" ++ x