diff options
Diffstat (limited to 'app/Configuration.hs')
| -rw-r--r-- | app/Configuration.hs | 156 |
1 files changed, 5 insertions, 151 deletions
diff --git a/app/Configuration.hs b/app/Configuration.hs index 6f6a0db..340124a 100644 --- a/app/Configuration.hs +++ b/app/Configuration.hs @@ -19,9 +19,6 @@ module Configuration (readConfig, readDefaultConfig) where -import Text.ParserCombinators.Parsec -import Text.ParserCombinators.Parsec.Number (int) -import Text.ParserCombinators.Parsec.Perm ((<|?>), (<$?>), permute) import Control.Monad.IO.Class (liftIO) import System.Environment @@ -29,158 +26,15 @@ import System.Posix.Files (fileExist) import qualified Xmobar as X -#if defined XFT || defined UTF8 -import qualified System.IO as S (readFile,hGetLine) -#endif - -readFileSafe :: FilePath -> IO String -#if defined XFT || defined UTF8 -readFileSafe = S.readFile -#else -readFileSafe = readFile -#endif - -stripComments :: String -> String -stripComments = - unlines . map (drop 5 . strip False . (replicate 5 ' '++)) . lines - where strip m ('-':'-':xs) = if m then "--" ++ strip m xs else "" - strip m ('"':xs) = '"': strip (not m) xs - strip m (x:xs) = x : strip m xs - strip _ [] = [] - --- | Parse the config, logging a list of fields that were missing and replaced --- by the default definition. -parseConfig :: String -> Either ParseError (X.Config,[String]) -parseConfig = runParser parseConf fields "Config" . stripComments - where - parseConf = do - many space - sepEndSpc ["Config","{"] - x <- perms - eof - s <- getState - return (x,s) - - perms = permute $ X.Config - <$?> pFont <|?> pFontList <|?> pWmClass <|?> pWmName - <|?> pBgColor <|?> pFgColor - <|?> pPosition <|?> pTextOffset <|?> pTextOffsets - <|?> pIconOffset <|?> pBorder - <|?> pBdColor <|?> pBdWidth <|?> pAlpha <|?> pHideOnStart - <|?> pAllDesktops <|?> pOverrideRedirect <|?> pPickBroadest - <|?> pLowerOnStart <|?> pPersistent <|?> pIconRoot - <|?> pCommands <|?> pSepChar <|?> pAlignSep <|?> pTemplate - - - fields = [ "font", "additionalFonts","bgColor", "fgColor" - , "wmClass", "wmName", "sepChar" - , "alignSep" , "border", "borderColor" ,"template" - , "position" , "textOffset", "textOffsets", "iconOffset" - , "allDesktops", "overrideRedirect", "pickBroadest" - , "hideOnStart", "lowerOnStart", "persistent", "iconRoot" - , "alpha", "commands" - ] - - pFont = strField X.font "font" - pFontList = strListField X.additionalFonts "additionalFonts" - pWmClass = strField X.wmClass "wmClass" - pWmName = strField X.wmName "wmName" - pBgColor = strField X.bgColor "bgColor" - pFgColor = strField X.fgColor "fgColor" - pBdColor = strField X.borderColor "borderColor" - pSepChar = strField X.sepChar "sepChar" - pAlignSep = strField X.alignSep "alignSep" - pTemplate = strField X.template "template" - - pTextOffset = readField X.textOffset "textOffset" - pTextOffsets = readIntList X.textOffsets "textOffsets" - pIconOffset = readField X.iconOffset "iconOffset" - pPosition = readField X.position "position" - pHideOnStart = readField X.hideOnStart "hideOnStart" - pLowerOnStart = readField X.lowerOnStart "lowerOnStart" - pPersistent = readField X.persistent "persistent" - pBorder = readField X.border "border" - pBdWidth = readField X.borderWidth "borderWidth" - pAllDesktops = readField X.allDesktops "allDesktops" - pOverrideRedirect = readField X.overrideRedirect "overrideRedirect" - pPickBroadest = readField X.pickBroadest "pickBroadest" - pIconRoot = readField X.iconRoot "iconRoot" - pAlpha = readField X.alpha "alpha" - - pCommands = field X.commands "commands" readCommands - - staticPos = do string "Static" - wrapSkip (string "{") - p <- many (noneOf "}") - wrapSkip (string "}") - string "," - return ("Static {" ++ p ++ "}") - tillFieldEnd = staticPos <|> many (noneOf ",}\n\r") - - commandsEnd = wrapSkip (string "]") >> (string "}" <|> notNextRun) - notNextRun = do {string "," - ; notFollowedBy $ wrapSkip $ string "Run" - ; return "," - } - readCommands = manyTill anyChar (try commandsEnd) >>= - read' commandsErr . flip (++) "]" - strField e n = field e n strMulti - - strMulti = scan '"' - where - scan lead = do - spaces - char lead - s <- manyTill anyChar (rowCont <|> unescQuote) - (char '"' >> return s) <|> fmap (s ++) (scan '\\') - rowCont = try $ char '\\' >> string "\n" - unescQuote = lookAhead (noneOf "\\") >> lookAhead (string "\"") - - strListField e n = field e n strList - strList = do - spaces - char '[' - list <- sepBy (strMulti >>= \x -> spaces >> return x) (char ',') - spaces - char ']' - return list - - wrapSkip x = many space >> x >>= \r -> many space >> return r - sepEndSpc = mapM_ (wrapSkip . try . string) - fieldEnd = many $ space <|> oneOf ",}" - field e n c = (,) (e X.defaultConfig) $ - updateState (filter (/= n)) >> sepEndSpc [n,"="] >> - wrapSkip c >>= \r -> fieldEnd >> return r - readField a n = field a n $ tillFieldEnd >>= read' n - - readIntList d n = field d n intList - intList = do - spaces - char '[' - list <- sepBy (spaces >> int >>= \x-> spaces >> return x) (char ',') - spaces - char ']' - return list - - read' d s = case reads s of - [(x, _)] -> return x - _ -> fail $ "error reading the " ++ d ++ " field: " ++ s - -commandsErr :: String -commandsErr = "commands: this usually means that a command could not" ++ - "\nbe parsed." ++ - "\nThe error could be located at the begining of the command" ++ - "\nwhich follows the offending one." - -- | Reads the configuration files or quits with an error readConfig :: FilePath -> String -> IO (X.Config,[String]) readConfig f usage = do + let err m = error $ f ++ ": " ++ m ++ "\n" ++ usage file <- liftIO $ fileExist f - s <- liftIO $ if file then readFileSafe f else error $ - f ++ ": file not found!\n" ++ usage - either (\err -> error $ f ++ - ": configuration file contains errors at:\n" ++ show err) - return $ parseConfig s + r <- if file then X.readConfig X.defaultConfig f else err "file not found" + case r of + Left e -> err (show e) + Right res -> return res -- | Read default configuration file or load the default config readDefaultConfig :: String -> IO (X.Config,[String]) |