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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.Posix.Files
-- $main
-- | The main entry point
main :: IO ()
main =
do args <- getArgs
(o,file) <- getOpts args
c <- case file of
[cfgfile] -> readConfig cfgfile
_ -> readDefaultConfig
civ <- newIORef c
doOpts civ o
conf <- readIORef civ
cl <- parseTemplate conf (template conf)
vars <- mapM startCommand cl
(d,w) <- createWin conf
eventLoop conf vars d w
return ()
-- | Reads the configuration files or quits with an error
readConfig :: FilePath -> IO Config
readConfig f =
do file <- fileExist f
s <- if file then readFile f else error $ f ++ ": file not found!\n" ++ usage
case reads s of
[(conf,_)] -> return conf
[] -> error $ f ++ ": configuration file contains errors!\n" ++ usage
_ -> error ("Some problem occured. Aborting...")
-- | Read default configuration file or load the default config
readDefaultConfig :: IO Config
readDefaultConfig =
do home <- getEnv "HOME"
let path = home ++ "/.xmobarrc"
f <- fileExist path
if f then readConfig path else return defaultConfig
data Opts = Help
| Version
| Font String
| BgColor String
| FgColor String
| XPos String
| YPos String
| Width String
| Height String
| Align 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 "bg color" ) "The background color. Default black"
, Option ['F' ] ["fgcolor" ] (ReqArg FgColor "fg color" ) "The foreground color. Default grey"
, Option ['x' ] ["xpos" ] (ReqArg XPos "x pos" ) "The x position. Default 0"
, Option ['y' ] ["ypos" ] (ReqArg YPos "y pos" ) "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 height. Default 15"
, Option ['a' ] ["align" ] (ReqArg Align "align" ) "The text alignment: center, left or right.\nDefault: left"
, Option ['s' ] ["sepchar" ] (ReqArg SepChar "char" ) "The character used to separate commands in\nthe output template. 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) ++ footer
where header = "Usage: xmobar [OPTION...] [FILE]\nOptions:"
footer = "\nMail bug reports and suggestions to " ++ mail
version :: String
version = "Xmobar 0.7 (C) 2007 Andrea Rossato " ++ mail ++ license
mail :: String
mail = "<andrea.rossato@unibz.it>\n"
license :: String
license = "\nThis program is distributed in the hope that it will be useful,\n" ++
"but WITHOUT ANY WARRANTY; without even the implied warranty of\n" ++
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" ++
"See the License for more details."
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 }) >> go
BgColor s -> modifyIORef conf (\c -> c { bgColor = s }) >> go
FgColor s -> modifyIORef conf (\c -> c { fgColor = s }) >> go
XPos s -> modifyIORef conf (\c -> c { xPos = readInt s c xPos }) >> go
YPos s -> modifyIORef conf (\c -> c { yPos = readInt s c yPos }) >> go
Width s -> modifyIORef conf (\c -> c { width = readInt s c width }) >> go
Height s -> modifyIORef conf (\c -> c { height = readInt s c height }) >> go
Align s -> modifyIORef conf (\c -> c { align = s }) >> go
SepChar s -> modifyIORef conf (\c -> c { sepChar = s }) >> go
Template s -> modifyIORef conf (\c -> c { template = s }) >> go
Commands s -> case readCom s of
Right x -> modifyIORef conf (\c -> c { commands = x })>> go
Left e -> putStr (e ++ usage) >> exitWith (ExitFailure 1)
where 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]
go = doOpts conf oo
|
