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Diffstat (limited to 'app/Main.hs')
| -rw-r--r-- | app/Main.hs | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/app/Main.hs b/app/Main.hs new file mode 100644 index 0000000..0760d16 --- /dev/null +++ b/app/Main.hs @@ -0,0 +1,170 @@ +{-# LANGUAGE FlexibleContexts #-} +----------------------------------------------------------------------------- +-- | +-- Module : Xmobar.Main +-- Copyright : (c) Andrea Rossato +-- License : BSD-style (see LICENSE) +-- +-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org> +-- Stability : unstable +-- Portability : unportable +-- +-- The main module of Xmobar, a text based status bar +-- +----------------------------------------------------------------------------- + +module Main (main) where + +import Data.List (intercalate) + +import Data.Version (showVersion) +import System.Console.GetOpt +import System.Exit +import System.Environment (getArgs) +import Control.Monad (unless) +import Text.Read (readMaybe) + +import Xmobar (xmobar) +import Xmobar.Config + +import Paths_xmobar (version) +import Configuration (readConfig, readDefaultConfig) + +-- $main + +-- | The main entry point +main :: IO () +main = do + (o,file) <- getArgs >>= getOpts + (c,defaultings) <- case file of + [cfgfile] -> readConfig cfgfile usage + _ -> readDefaultConfig usage + unless (null defaultings) $ putStrLn $ + "Fields missing from config defaulted: " ++ intercalate "," defaultings + doOpts c o >>= xmobar + +data Opts = Help + | Version + | Font String + | BgColor String + | FgColor String + | Alpha String + | T + | B + | D + | AlignSep String + | Commands String + | AddCommand String + | SepChar String + | Template String + | OnScr String + | IconRoot String + | Position String + | WmClass String + | WmName String + deriving Show + +options :: [OptDescr Opts] +options = + [ Option "h?" ["help"] (NoArg Help) "This help" + , Option "V" ["version"] (NoArg Version) "Show version information" + , Option "f" ["font"] (ReqArg Font "font name") "The font name" + , Option "w" ["wmclass"] (ReqArg WmClass "class") "X11 WM_CLASS property" + , Option "n" ["wmname"] (ReqArg WmName "name") "X11 WM_NAME property" + , Option "B" ["bgcolor"] (ReqArg BgColor "bg color" ) + "The background color. Default black" + , Option "F" ["fgcolor"] (ReqArg FgColor "fg color") + "The foreground color. Default grey" + , Option "i" ["iconroot"] (ReqArg IconRoot "path") + "Root directory for icon pattern paths. Default '.'" + , Option "A" ["alpha"] (ReqArg Alpha "alpha") + "The transparency: 0 is transparent, 255 is opaque. Default: 255" + , Option "o" ["top"] (NoArg T) "Place xmobar at the top of the screen" + , Option "b" ["bottom"] (NoArg B) + "Place xmobar at the bottom of the screen" + , Option "d" ["dock"] (NoArg D) + "Don't override redirect from WM and function as a dock" + , Option "a" ["alignsep"] (ReqArg AlignSep "alignsep") + "Separators for left, center and right text\nalignment. Default: '}{'" + , Option "s" ["sepchar"] (ReqArg SepChar "char") + ("The character used to separate commands in" ++ + "\nthe output template. Default '%'") + , Option "t" ["template"] (ReqArg Template "template") + "The output template" + , Option "c" ["commands"] (ReqArg Commands "commands") + "The list of commands to be executed" + , Option "C" ["add-command"] (ReqArg AddCommand "command") + "Add to the list of commands to be executed" + , Option "x" ["screen"] (ReqArg OnScr "screen") + "On which X screen number to start" + , Option "p" ["position"] (ReqArg Position "position") + "Specify position of xmobar. Same syntax as in config file" + ] + +getOpts :: [String] -> IO ([Opts], [String]) +getOpts argv = + case getOpt Permute options argv of + (o,n,[]) -> return (o,n) + (_,_,errs) -> error (concat errs ++ usage) + +usage :: String +usage = usageInfo header options ++ footer + where header = "Usage: xmobar [OPTION...] [FILE]\nOptions:" + footer = "\nMail bug reports and suggestions to " ++ mail ++ "\n" + +info :: String +info = "xmobar " ++ showVersion version + ++ "\n (C) 2007 - 2010 Andrea Rossato " + ++ "\n (C) 2010 - 2018 Jose A Ortega Ruiz\n " + ++ mail ++ "\n" ++ license + +mail :: String +mail = "<mail@jao.io>" + +license :: String +license = "\nThis program is distributed in the hope that it will be useful," ++ + "\nbut WITHOUT ANY WARRANTY; without even the implied warranty of" ++ + "\nMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." ++ + "\nSee the License for more details." + +doOpts :: Config -> [Opts] -> IO Config +doOpts conf [] = + return (conf {lowerOnStart = lowerOnStart conf && overrideRedirect conf}) +doOpts conf (o:oo) = + case o of + Help -> putStr usage >> exitSuccess + Version -> putStrLn info >> exitSuccess + Font s -> doOpts' (conf {font = s}) + WmClass s -> doOpts' (conf {wmClass = s}) + WmName s -> doOpts' (conf {wmName = s}) + BgColor s -> doOpts' (conf {bgColor = s}) + FgColor s -> doOpts' (conf {fgColor = s}) + Alpha n -> doOpts' (conf {alpha = read n}) + T -> doOpts' (conf {position = Top}) + B -> doOpts' (conf {position = Bottom}) + D -> doOpts' (conf {overrideRedirect = False}) + AlignSep s -> doOpts' (conf {alignSep = s}) + SepChar s -> doOpts' (conf {sepChar = s}) + Template s -> doOpts' (conf {template = s}) + IconRoot s -> doOpts' (conf {iconRoot = s}) + OnScr n -> doOpts' (conf {position = OnScreen (read n) $ position conf}) + Commands s -> case readCom 'c' s of + Right x -> doOpts' (conf {commands = x}) + Left e -> putStr (e ++ usage) >> exitWith (ExitFailure 1) + AddCommand s -> case readCom 'C' s of + Right x -> doOpts' (conf {commands = commands conf ++ x}) + Left e -> putStr (e ++ usage) >> exitWith (ExitFailure 1) + Position s -> readPosition s + where readCom c str = + case readStr str of + [x] -> Right x + _ -> Left ("xmobar: cannot read list of commands " ++ + "specified with the -" ++ c:" option\n") + readStr str = [x | (x,t) <- reads str, ("","") <- lex t] + doOpts' opts = doOpts opts oo + readPosition string = + case readMaybe string of + Just x -> doOpts' (conf { position = x }) + Nothing -> do + putStrLn "Can't parse position option, ignoring" + doOpts' conf |