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|
-----------------------------------------------------------------------------
-- |
-- Module : Xmobar.Main
-- Copyright : (c) Andrea Rossato
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
-- Stability : unstable
-- Portability : unportable
--
-- The main module of Xmobar, a text based status bar
--
-----------------------------------------------------------------------------
module Main ( -- * Main Stuff
-- $main
main
, readConfig
, readDefaultConfig
) where
import Xmobar
import Parsers
import Config
import Data.IORef
import System.Console.GetOpt
import System.Exit
import System.Environment
import System.IO.Error
-- $main
-- | The main entry point
main :: IO ()
main =
do args <- getArgs
(o,file) <- getOpts args
conf <- case file of
[cfgfile] -> readConfig cfgfile
_ -> readDefaultConfig
c <- newIORef conf
doOpts c o
config <- readIORef c
cl <- parseTemplate config (template config)
var <- execCommands config cl
(d,w) <- createWin config
eventLoop config var d w
return ()
-- | Reads the configuration files or quits with an error
readConfig :: FilePath -> IO Config
readConfig f =
do s <- readFile f
case reads s of
[(config,_)] -> return config
[] -> error ("Corrupt config file: " ++ f)
_ -> error ("Some problem occured. Aborting...")
-- | Read default configuration or quit with an error
readDefaultConfig :: IO Config
readDefaultConfig =
do home <- getEnv "HOME"
let path = home ++ "/.xmobarrc"
catch (readConfig path)
(\e -> if isUserError e then ioError e else return defaultConfig)
data Opts = Help
| Version
| Font String
| BgColor String
| FgColor String
| XPos String
| YPos String
| Width String
| Height String
| Align String
| Refresh String
| Commands String
| SepChar String
| Template 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 ['B'] ["bgcolor"] (ReqArg BgColor "backgorund color") "The background color. Default balck"
, Option ['F'] ["fgcolor"] (ReqArg FgColor "foregorund color") "The foreground color. Default grey"
, Option ['x'] ["xpos"] (ReqArg XPos "x position") "The x position. Default 0"
, Option ['y'] ["ypos"] (ReqArg YPos "y position") "The y position. Default 0"
, Option ['W'] ["width"] (ReqArg Width "width") "The status bar width. Default 1024"
, Option ['H'] ["height"] (ReqArg Height "height") "The status bar heigth. Default 15"
, Option ['a'] ["align"] (ReqArg Align "text alignement") "The text alignment: center, left or right. Default: left"
, Option ['r'] ["refresh"] (ReqArg Refresh "default rate") "The refresh rate in tenth of seconds: dafault 1 sec."
, Option ['s'] ["sepchar"] (ReqArg SepChar "separation character") "The charater used to separate commands in the output templae. Default '%'"
, Option ['t'] ["template"] (ReqArg Template "tempate") "The output template"
, Option ['c'] ["commands"] (ReqArg Commands "commands") "The list of commands to be executed"
]
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
where header = "Usage: xmobar [OPTION...] [FILE]"
version :: String
version = "Xmobar 0.7 (c) 2007 Andrea Rossato <andrea.rossato@unibz.it>"
doOpts :: IORef Config -> [Opts] -> IO ()
doOpts _ [] = return ()
doOpts conf (o:oo) =
case o of
Help -> putStr usage >> exitWith ExitSuccess
Version -> putStrLn version >> exitWith ExitSuccess
Font s -> modifyIORef conf (\c -> c { font = s }) >> doOpts conf oo
BgColor s -> modifyIORef conf (\c -> c { bgColor = s }) >> doOpts conf oo
FgColor s -> modifyIORef conf (\c -> c { fgColor = s }) >> doOpts conf oo
XPos s -> modifyIORef conf (\c -> c { xPos = readInt s c xPos}) >> doOpts conf oo
YPos s -> modifyIORef conf (\c -> c { yPos = readInt s c yPos }) >> doOpts conf oo
Width s -> modifyIORef conf (\c -> c { width = readInt s c width }) >> doOpts conf oo
Height s -> modifyIORef conf (\c -> c { height = readInt s c height }) >> doOpts conf oo
Align s -> modifyIORef conf (\c -> c { align = s }) >> doOpts conf oo
Refresh s -> modifyIORef conf (\c -> c { refresh = readInt s c refresh }) >> doOpts conf oo
SepChar s -> modifyIORef conf (\c -> c { sepChar = s }) >> doOpts conf oo
Template s -> modifyIORef conf (\c -> c { template = s }) >> doOpts conf oo
Commands s -> do case readCom s of
Right x -> modifyIORef conf ((\v c -> c { commands = v }) x) >> doOpts conf oo
Left e -> putStr (e ++ usage) >> exitWith (ExitFailure 1)
where readCom :: Read a => String -> Either String a
readCom str = case readStr str of
[x] -> Right x
_ -> Left "xmobar: cannot read list of commands specified with the -c option\n"
readInt str c f = case readStr str of
[x] -> x
_ -> f c
readStr str = [x | (x,t) <- reads str, ("","") <- lex t]
|
