module Text.Highlighting.Kate.Syntax.Makefile ( 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 = "Makefile"
syntaxExtensions :: String
syntaxExtensions = "GNUmakefile;Makefile*;makefile*"
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 = "Makefile" }
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 [("Makefile",["Normal"])], synStLanguage = "Makefile", synStCurrentLine = "", synStCharsParsedInLine = 0, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
parseSourceLine = manyTill parseExpressionInternal pEndLine
pEndLine = do
newline <|> (eof >> return '\n')
context <- currentContext
case context of
"Normal" -> return ()
"String" -> (popContext >> return ())
"Value" -> return ()
"VarFromValue" -> return ()
"VarFromNormal" -> return ()
"Commands" -> (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"),("Comment","Comment"),("String","String"),("Variable","DataType"),("Target","DecVal"),("Section","Others"),("Operator","Char"),("Commands","BaseN"),("Special","Float")]
parseExpressionInternal = do
context <- currentContext
parseRules context <|> (pDefault >>= withAttribute (fromMaybe "" $ lookup context defaultAttributes))
defaultAttributes = [("Normal","Normal Text"),("String","String"),("Value","String"),("VarFromValue","Variable"),("VarFromNormal","Variable"),("Commands","Normal Text")]
parseRules "Normal" =
do (attr, result) <- (((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" ["include","define","else","endef","endif","ifdef","ifeq","ifndef","ifneq"] >>= withAttribute "Keyword"))
<|>
((pRegExpr (compileRegex "[_\\w\\d]*\\s*(?=:=|=)") >>= withAttribute "Variable") >>~ pushContext "Value")
<|>
((pFirstNonSpace >> pRegExpr (compileRegex "[_\\w\\d-]*\\s*:") >>= withAttribute "Target"))
<|>
((pColumn 0 >> pRegExpr (compileRegex "[.].*:") >>= withAttribute "Section"))
<|>
((pDetectChar False '"' >>= withAttribute "String") >>~ pushContext "String")
<|>
((pRegExpr (compileRegex "[$][\\({]") >>= withAttribute "Operator") >>~ pushContext "VarFromNormal")
<|>
((pDetect2Chars False '\\' '#' >>= withAttribute "Special"))
<|>
((pDetect2Chars False '\\' '\\' >>= withAttribute "Special"))
<|>
((pAnyChar "+*=%$():\\;" >>= withAttribute "Operator"))
<|>
((pFirstNonSpace >> pAnyChar "@-" >>= withAttribute "Operator") >>~ pushContext "Commands")
<|>
((pRegExpr (compileRegex "#.*$") >>= withAttribute "Comment")))
return (attr, result)
parseRules "String" =
do (attr, result) <- (((pLineContinue >>= withAttribute "String"))
<|>
((pDetectChar False '"' >>= withAttribute "String") >>~ (popContext >> return ())))
return (attr, result)
parseRules "Value" =
do (attr, result) <- (((pRegExpr (compileRegex "\\\\$") >>= withAttribute "Operator"))
<|>
((pRegExpr (compileRegex "[^\\\\]?$") >>= withAttribute "String") >>~ (popContext >> return ()))
<|>
((pRegExpr (compileRegex "[$][\\({]") >>= withAttribute "Operator") >>~ pushContext "VarFromValue")
<|>
((pRegExpr (compileRegex "@[-_\\d\\w]*@") >>= withAttribute "Special") >>~ (popContext >> return ()))
<|>
((pDetectChar False ';' >>= withAttribute "Operator") >>~ (popContext >> return ())))
return (attr, result)
parseRules "VarFromValue" =
do (attr, result) <- (((pRegExpr (compileRegex "[\\)}](?=/)") >>= withAttribute "Operator") >>~ (popContext >> return ()))
<|>
((pRegExpr (compileRegex "[\\)}][^$]") >>= withAttribute "Operator") >>~ (popContext >> return ()))
<|>
((pRegExpr (compileRegex "[\\)}]$") >>= withAttribute "Operator") >>~ (popContext >> popContext >> return ())))
return (attr, result)
parseRules "VarFromNormal" =
do (attr, result) <- ((pAnyChar ")}" >>= withAttribute "Operator") >>~ (popContext >> return ()))
return (attr, result)
parseRules "Commands" =
do (attr, result) <- (((pRegExpr (compileRegex "[$][\\({]") >>= withAttribute "Operator") >>~ pushContext "VarFromNormal")
<|>
((pRegExpr (compileRegex "[_\\w-]*\\b") >>= withAttribute "Commands") >>~ (popContext >> return ())))
return (attr, result)
parseRules x = fail $ "Unknown context" ++ x