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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 Xmobar.Parsers
+import Xmobar.Config
+import Xmobar.XUtil
+
+import Data.Foldable (for_)
+import Data.List (intercalate)
+import qualified Data.Map as Map
+
+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.Concurrent.Async (Async, cancel)
+import Control.Exception (bracket)
+import Control.Monad (unless)
+import Text.Read (readMaybe)
+
+import Xmobar.Signal (setupSignalHandler, withDeferSignals)
+
+import Paths_xmobar (version)
+import Configuration
+
+-- $main
+
+-- | The main entry point
+main :: IO ()
+main = withDeferSignals $ 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)
+ fl <- mapM (initFont d) (additionalFonts conf)
+ cls <- mapM (parseTemplate conf) (splitTemplate conf)
+ sig <- setupSignalHandler
+ bracket (mapM (mapM $ startCommand sig) cls)
+ cleanupThreads
+ $ \vars -> do
+ (r,w) <- createWin d fs conf
+ let ic = Map.empty
+ to = textOffset conf
+ ts = textOffsets conf ++ replicate (length fl) (-1)
+ startLoop (XConf d r w (fs:fl) (to:ts) ic conf) sig vars
+
+cleanupThreads :: [[([Async ()], a)]] -> IO ()
+cleanupThreads vars =
+ -- putStrLn "In cleanupThreads"
+ for_ (concat vars) $ \(asyncs, _) ->
+ for_ asyncs cancel
+
+-- | 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 -> fmap (</> ".config") getHomeDirectory
+
+xmobarConfigDir :: IO FilePath
+xmobarConfigDir = fmap (</> "xmobar") xdgConfigDir
+
+getXdgConfigFile :: IO FilePath
+getXdgConfigFile = fmap (</> "xmobarrc") xmobarConfigDir
+
+-- | Read default configuration file or load the default config
+readDefaultConfig :: IO (Config,[String])
+readDefaultConfig = do
+ xdgConfigFile <- getXdgConfigFile
+ xdgConfigFileExists <- io $ fileExist xdgConfigFile
+ home <- io $ getEnv "HOME"
+ let defaultConfigFile = home ++ "/.xmobarrc"
+ defaultConfigFileExists <- io $ fileExist defaultConfigFile
+ if xdgConfigFileExists
+ then readConfig xdgConfigFile
+ else if defaultConfigFileExists
+ then readConfig defaultConfigFile
+ else return (defaultConfig,[])
+
+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
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