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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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