module Text.Highlighting.Kate.Syntax.Relaxngcompact ( 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)
syntaxName :: String
syntaxName = "RelaxNG-Compact"
syntaxExtensions :: String
syntaxExtensions = "*.rnc"
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 = "RelaxNG-Compact" }
context <- currentContext <|> (pushContext "Normal Text" >> 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 [("RelaxNG-Compact",["Normal Text"])], synStLanguage = "RelaxNG-Compact", synStCurrentLine = "", synStCharsParsedInLine = 0, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
parseSourceLine = manyTill parseExpressionInternal pEndLine
pEndLine = do
newline <|> (eof >> return '\n')
context <- currentContext
case context of
"Normal Text" -> return ()
"Comments" -> (popContext >> return ())
"String" -> return ()
"Node Names" -> (popContext >> return ())
"Definitions" -> (popContext >> 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"),("Comments","Comment"),("String","String"),("Keywords","Keyword"),("Datatypes","DataType"),("Node Names","Others"),("Definitions","Function")]
parseExpressionInternal = do
context <- currentContext
parseRules context <|> (pDefault >>= withAttribute (fromMaybe "" $ lookup context defaultAttributes))
defaultAttributes = [("Normal Text","Normal Text"),("Comments","Comments"),("String","String"),("Node Names","Node Names"),("Definitions","Definitions")]
parseRules "Normal Text" =
do (attr, result) <- (((pFirstNonSpace >> pDetectChar False '#' >>= withAttribute "Comments") >>~ pushContext "Comments")
<|>
((pDetectChar False '"' >>= withAttribute "String") >>~ pushContext "String")
<|>
((pKeyword " \n\t.()!+,<=>%&*/;?[]^{|}~\\" ["default","datatypes","div","empty","external","grammar","include","inherit","list","mixed","namespace","notAllowed","parent","start","token"] >>= withAttribute "Keywords"))
<|>
((pKeyword " \n\t.()!+,<=>%&*/;?[]^{|}~\\" ["attribute","element"] >>= withAttribute "Keywords") >>~ pushContext "Node Names")
<|>
((pKeyword " \n\t.()!+,<=>%&*/;?[]^{|}~\\" ["string","text","xsd:anyURI","xsd:base64Binary","xsd:boolean","xsd:byte","xsd:date","xsd:dateTime","xsd:decimal","xsd:double","xsd:duration","xsd:ENTITIES","xsd:ENTITY","xsd:float","xsd:gDay","xsd:gMonth","xsd:gMonthDay","xsd:gYear","xsd:gYearMonth","xsd:hexBinary","xsd:ID","xsd:IDREF","xsd:IDREFS","xsd:int","xsd:integer","xsd:language","xsd:long","xsd:Name","xsd:NCName","xsd:negativeInteger","xsd:NMTOKEN","xsd:NMTOKENS","xsd:nonNegativeInteger","xsd:nonPositiveInteger","xsd:normalizedString","xsd:NOTATION","xsd:positiveInteger","xsd:QName","xsd:short","xsd:string","xsd:time","xsd:token","xsd:unsignedByte","xsd:unsignedInt","xsd:unsignedLong","xsd:unsignedShort"] >>= withAttribute "Datatypes"))
<|>
((lookAhead (pRegExpr (compileRegex "[\\w\\.-]+[\\s]+=")) >> return ([],"") ) >>~ pushContext "Definitions"))
return (attr, result)
parseRules "Comments" =
pzero
parseRules "String" =
do (attr, result) <- ((pDetectChar False '"' >>= withAttribute "String") >>~ (popContext >> return ()))
return (attr, result)
parseRules "Node Names" =
do (attr, result) <- ((lookAhead (pDetectChar False '{') >> return ([],"") ) >>~ (popContext >> return ()))
return (attr, result)
parseRules "Definitions" =
do (attr, result) <- ((lookAhead (pDetectChar False '=') >> return ([],"") ) >>~ (popContext >> popContext >> return ()))
return (attr, result)
parseRules x = fail $ "Unknown context" ++ x