module Text.Highlighting.Kate.Syntax.Pascal ( 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 = "Pascal"
syntaxExtensions :: String
syntaxExtensions = "*.pp;*.pas;*.p"
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 = "Pascal" }
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 [("Pascal",["Normal"])], synStLanguage = "Pascal", synStCurrentLine = "", synStCharsParsedInLine = 0, synStCaseSensitive = True, synStKeywordCaseSensitive = False, synStCaptures = []}
parseSourceLine = manyTill parseExpressionInternal pEndLine
pEndLine = do
newline <|> (eof >> return '\n')
context <- currentContext
case context of
"Normal" -> return ()
"String" -> (popContext >> return ())
"Prep1" -> (popContext >> return ())
"Prep2" -> (popContext >> return ())
"Comment1" -> return ()
"Comment2" -> return ()
"Comment3" -> (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"),("Keyword","Keyword"),("ISO/Delphi Extended","Keyword"),("Type","DataType"),("Number","DecVal"),("String","String"),("Directive","Others"),("Comment","Comment"),("Alert","Alert")]
parseExpressionInternal = do
context <- currentContext
parseRules context <|> (pDefault >>= withAttribute (fromMaybe "" $ lookup context defaultAttributes))
defaultAttributes = [("Normal","Normal Text"),("String","String"),("Prep1","Directive"),("Prep2","Directive"),("Comment1","Comment"),("Comment2","Comment"),("Comment3","Comment")]
parseRules "Normal" =
do (attr, result) <- (((pRegExpr (compileRegex "\\b(begin|case|record)(?=(\\{[^}]*(\\}|$)|\\(\\*.*(\\*\\)|$))*([\\s]|$|//))") >>= withAttribute "Keyword"))
<|>
((pRegExpr (compileRegex "\\b((object|class)(?=(\\(.*\\))?(\\{[^}]*(\\}|$)|\\(\\*.*(\\*\\)|$))*;?([\\s]|$|//))|try(?=(\\{[^}]*(\\}|$)|\\(\\*.*(\\*\\)|$))*([\\s]|$|//)))") >>= withAttribute "ISO/Delphi Extended"))
<|>
((pRegExpr (compileRegex "\\bend(?=((\\{[^}]*(\\}|$)|\\(\\*.*(\\*\\)|$))*)([.;\\s]|$)|//|$)") >>= withAttribute "Keyword"))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["and","array","asm","case","const","div","do","downto","else","file","for","function","goto","if","in","label","mod","nil","not","of","operator","or","packed","procedure","program","record","repeat","set","then","to","type","unit","until","uses","var","while","with","xor","at","automated","break","continue","dispinterface","dispose","exit","false","finalization","initialization","library","new","published","resourcestring","self","true"] >>= withAttribute "Keyword"))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["abstract","as","bindable","constructor","destructor","except","export","finally","import","implementation","inherited","inline","interface","is","module","on","only","otherwise","override","private","property","protected","public","read","qualified","raise","restricted","shl","shr","threadvar","try","virtual","write"] >>= withAttribute "ISO/Delphi Extended"))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["Integer","Cardinal","ShortInt","SmallInt","LongInt","Int64","Byte","Word","LongWord","Char","AnsiChar","WideChar","Boolean","ByteBool","WordBool","LongBool","Single","Double","Extended","Comp","Currency","Real","Real48","String","ShortString","AnsiString","WideString","Pointer","Variant","File","Text"] >>= withAttribute "Type"))
<|>
((pFloat >>= withAttribute "Number"))
<|>
((pInt >>= withAttribute "Number"))
<|>
((pDetectChar False '\'' >>= withAttribute "String") >>~ pushContext "String")
<|>
((pString False "(*$" >>= withAttribute "Directive") >>~ pushContext "Prep1")
<|>
((pDetect2Chars False '{' '$' >>= withAttribute "Directive") >>~ pushContext "Prep2")
<|>
((pDetectChar False '{' >>= withAttribute "Comment") >>~ pushContext "Comment1")
<|>
((pDetect2Chars False '(' '*' >>= withAttribute "Comment") >>~ pushContext "Comment2")
<|>
((pDetect2Chars False '/' '/' >>= withAttribute "Comment") >>~ pushContext "Comment3"))
return (attr, result)
parseRules "String" =
do (attr, result) <- ((pDetectChar False '\'' >>= withAttribute "String") >>~ (popContext >> return ()))
return (attr, result)
parseRules "Prep1" =
do (attr, result) <- ((pDetect2Chars False '*' ')' >>= withAttribute "Directive") >>~ (popContext >> return ()))
return (attr, result)
parseRules "Prep2" =
do (attr, result) <- ((pDetectChar False '}' >>= withAttribute "Directive") >>~ (popContext >> return ()))
return (attr, result)
parseRules "Comment1" =
do (attr, result) <- (((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["FIXME","TODO","###"] >>= withAttribute "Alert"))
<|>
((pDetectChar False '}' >>= withAttribute "Comment") >>~ (popContext >> return ())))
return (attr, result)
parseRules "Comment2" =
do (attr, result) <- (((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["FIXME","TODO","###"] >>= withAttribute "Alert"))
<|>
((pDetect2Chars False '*' ')' >>= withAttribute "Comment") >>~ (popContext >> return ())))
return (attr, result)
parseRules "Comment3" =
do (attr, result) <- ((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["FIXME","TODO","###"] >>= withAttribute "Alert"))
return (attr, result)
parseRules x = fail $ "Unknown context" ++ x