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|
{-# 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 Stuff
-- $main
main
, readConfig
, readDefaultConfig
) where
import Xmobar
import Parsers
import Config
import XUtil
import Data.List (intercalate)
import qualified Data.Map as Map
import Paths_xmobar (version)
import Data.Version (showVersion)
import Graphics.X11.Xlib
import System.Console.GetOpt
import System.Directory (getHomeDirectory)
import System.Exit
import System.Environment
import System.FilePath ((</>))
import System.Posix.Files
import Control.Monad (unless)
import Signal (setupSignalHandler)
-- $main
-- | The main entry point
main :: IO ()
main = do
initThreads
d <- openDisplay ""
args <- getArgs
(o,file) <- getOpts args
(c,defaultings) <- case file of
[cfgfile] -> readConfig cfgfile
_ -> readDefaultConfig
unless (null defaultings) $ putStrLn $
"Fields missing from config defaulted: " ++ intercalate "," defaultings
conf <- doOpts c o
fs <- initFont d (font conf)
cls <- mapM (parseTemplate conf) (splitTemplate conf)
sig <- setupSignalHandler
vars <- mapM (mapM $ startCommand sig) cls
(r,w) <- createWin d fs conf
let ic = Map.empty
startLoop (XConf d r w fs ic conf) sig vars
-- | Splits the template in its parts
splitTemplate :: Config -> [String]
splitTemplate conf =
case break (==l) t of
(le,_:re) -> case break (==r) re of
(ce,_:ri) -> [le, ce, ri]
_ -> def
_ -> def
where [l, r] = alignSep
(if length (alignSep conf) == 2 then conf else defaultConfig)
t = template conf
def = [t, "", ""]
-- | Reads the configuration files or quits with an error
readConfig :: FilePath -> IO (Config,[String])
readConfig f = do
file <- io $ fileExist f
s <- io $ 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
xdgConfigDir :: IO String
xdgConfigDir = do env <- getEnvironment
case lookup "XDG_CONFIG_HOME" env of
Just val -> return val
Nothing -> getHomeDirectory >>= return . (</> ".config")
xmobarConfigDir :: IO FilePath
xmobarConfigDir = xdgConfigDir >>= return . (</> "xmobar")
getXdgConfigFile :: IO FilePath
getXdgConfigFile = xmobarConfigDir >>= return . (</> "xmobarrc")
-- | Read default configuration file or load the default config
readDefaultConfig :: IO (Config,[String])
readDefaultConfig = do
xdgconf <- getXdgConfigFile
x <- io $ fileExist xdgconf
home <- io $ getEnv "HOME"
let path = home ++ "/.xmobarrc"
f <- io $ fileExist xdgconf
if x then readConfig path
else if f then readConfig path
else return (defaultConfig,[])
data Opts = Help
| Version
| Font String
| BgColor String
| FgColor String
| T
| B
| D
| AlignSep String
| Commands String
| AddCommand String
| SepChar String
| Template String
| OnScr 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 "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"
]
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 - 2013 Jose A Ortega Ruiz\n "
++ mail ++ "\n" ++ license
mail :: String
mail = "<xmobar@projects.haskell.org>"
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})
BgColor s -> doOpts' (conf {bgColor = s})
FgColor s -> doOpts' (conf {fgColor = s})
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})
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)
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
|
