xmonad-config/bin/xmobar.hs

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module Main (main) where
--------------------------------------------------------------------------------
-- | Xmobar binary
--
-- Features:
-- * Uses the 'UnsafeStdinReader' to receive the current workspace/layout config
-- from xmonad
-- * FontAwesome and Symbol fonts for icons
-- * Some custom plugins (imported below)
-- * Theme integration with xmonad (shared module imported below)
-- * A custom Locks plugin from my own forked repo
import Data.Either
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import Data.List
import Data.Maybe
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import DBus.Client
import DBus.Internal
import System.Directory
import System.Exit
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import System.IO
import System.IO.Error
import System.Process
( readProcessWithExitCode
)
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import Xmobar.Plugins.Bluetooth
import Xmobar.Plugins.ClevoKeyboard
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import Xmobar.Plugins.Device
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import Xmobar.Plugins.IntelBacklight
import Xmobar.Plugins.Screensaver
import Xmobar.Plugins.VPN
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import XMonad.Core
( cfgDir
, getDirectories
)
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import XMonad.Hooks.DynamicLog (wrap)
import XMonad.Internal.Command.Power (hasBattery)
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import XMonad.Internal.DBus.Brightness.ClevoKeyboard
import XMonad.Internal.DBus.Brightness.IntelBacklight
import XMonad.Internal.DBus.Screensaver (ssSignalDep)
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import XMonad.Internal.Dependency
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import XMonad.Internal.Shell
import qualified XMonad.Internal.Theme as T
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import Xmobar
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import Xmobar.Plugins.Common
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main :: IO ()
main = do
sysClient <- getDBusClient True
sesClient <- getDBusClient False
cs <- getAllCommands =<< rightPlugins sysClient sesClient
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d <- cfgDir <$> getDirectories
-- this is needed to see any printed messages
hFlush stdout
mapM_ (maybe skip disconnect) [sysClient, sesClient]
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xmobar $ config cs d
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config :: BarRegions -> String -> Config
config br confDir = defaultConfig
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-- TODO head makes me feel icky
{ font = head allFontStrings
, additionalFonts = drop 1 allFontStrings
, textOffset = head allFontOffsets
, textOffsets = drop 1 allFontOffsets
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, bgColor = T.bgColor
, fgColor = T.fgColor
, position = BottomSize C 100 24
, border = NoBorder
, borderColor = T.bordersColor
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, sepChar = pSep
, alignSep = [lSep, rSep]
, template = fmtRegions br
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, lowerOnStart = False
, hideOnStart = False
, allDesktops = True
, overrideRedirect = True
, pickBroadest = False
, persistent = True
-- store the icons with the xmonad/xmobar stack project
, iconRoot = confDir ++ "/icons"
, commands = csRunnable <$> concatRegions br
}
--------------------------------------------------------------------------------
-- | command specifications
data BarRegions = BarRegions
{ brLeft :: [CmdSpec]
, brCenter :: [CmdSpec]
, brRight :: [CmdSpec]
} deriving Show
data CmdSpec = CmdSpec
{ csAlias :: String
, csRunnable :: Runnable
} deriving Show
concatRegions :: BarRegions -> [CmdSpec]
concatRegions (BarRegions l c r) = l ++ c ++ r
wirelessCmd :: String -> CmdSpec
wirelessCmd iface = CmdSpec
{ csAlias = iface ++ "wi"
, csRunnable = Run
$ Wireless iface
[ "-t", "<qualityipat><essid>"
, "--"
, "--quality-icon-pattern", "<icon=wifi_%%.xpm/>"
] 5
}
ethernetCmd :: String -> CmdSpec
ethernetCmd iface = CmdSpec
{ csAlias = iface
, csRunnable = Run
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$ Device (iface, fontifyText IconMedium "\xf0e8", colors)
}
batteryCmd :: CmdSpec
batteryCmd = CmdSpec
{ csAlias = "battery"
, csRunnable = Run
$ Battery
[ "--template", "<acstatus><left>"
, "--Low", "10"
, "--High", "80"
, "--low", "red"
, "--normal", T.fgColor
, "--high", T.fgColor
, "--"
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, "-a", notify
, "-P"
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, "-o" , fontify "\xf0e7"
, "-O" , fontify "\xf1e6"
, "-i" , fontify "\xf1e6"
] 50
}
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where
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fontify = fontifyText IconSmall
-- TODO format this with standardized notification library from xmonad.internal
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notify = fmtCmd "notify-send"
[ "-u"
, "critical"
, "-i"
, "'dialog-information-symbolic'"
, "'low battery'"
]
vpnCmd :: CmdSpec
vpnCmd = CmdSpec
{ csAlias = vpnAlias
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, csRunnable = Run $ VPN (fontifyText IconMedium "\xf023", colors)
}
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btCmd :: CmdSpec
btCmd = CmdSpec
{ csAlias = btAlias
, csRunnable = Run
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$ Bluetooth (fontify "\xf5b0", fontify "\xf5ae") colors
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}
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where
fontify = fontifyText IconLarge
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alsaCmd :: CmdSpec
alsaCmd = CmdSpec
{ csAlias = "alsa:default:Master"
, csRunnable = Run
$ Alsa "default" "Master"
[ "-t", "<status><volume>%"
, "--"
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, "-O", fontifyText IconSmall "\xf028"
, "-o", fontifyText IconSmall "\xf026 "
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, "-c", T.fgColor
, "-C", T.fgColor
]
}
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blCmd :: CmdSpec
blCmd = CmdSpec
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{ csAlias = blAlias
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, csRunnable = Run $ IntelBacklight $ fontifyText IconSmall "\xf185"
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}
ckCmd :: CmdSpec
ckCmd = CmdSpec
{ csAlias = ckAlias
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, csRunnable = Run $ ClevoKeyboard $ fontifyText IconSmall "\xf40b"
}
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ssCmd :: CmdSpec
ssCmd = CmdSpec
{ csAlias = ssAlias
, csRunnable = Run
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$ Screensaver (fontifyText IconSmall "\xf254", colors)
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}
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lockCmd :: CmdSpec
lockCmd = CmdSpec
{ csAlias = "locks"
, csRunnable = Run
$ Locks
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[ "-N", numIcon
, "-n", disabledColor numIcon
, "-C", capIcon
, "-c", disabledColor capIcon
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, "-s", ""
, "-S", ""
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, "-d", " "
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]
}
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where
numIcon = fontify "\xf8a5"
capIcon = fontify "\xf657"
fontify = fontifyText IconXLarge
disabledColor = xmobarFGColor T.backdropFgColor
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dateCmd :: CmdSpec
dateCmd = CmdSpec
{ csAlias = "date"
, csRunnable = Run $ Date "%Y-%m-%d %H:%M:%S " "date" 10
}
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--------------------------------------------------------------------------------
-- | command runtime checks and setup
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--
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-- some commands depend on the presence of interfaces that can only be
-- determined at runtime; define these checks here
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--
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-- in the case of network interfaces, assume that the system uses systemd in
-- which case ethernet interfaces always start with "en" and wireless
-- interfaces always start with "wl"
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type BarFeature = Sometimes CmdSpec
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isWireless :: String -> Bool
isWireless ('w':'l':_) = True
isWireless _ = False
isEthernet :: String -> Bool
isEthernet ('e':'n':_) = True
isEthernet _ = False
listInterfaces :: IO [String]
listInterfaces = fromRight [] <$> tryIOError (listDirectory sysfsNet)
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sysfsNet :: FilePath
sysfsNet = "/sys/class/net"
readInterface :: String -> (String -> Bool) -> IODependency String
readInterface n f = IORead n go
where
go = do
ns <- filter f <$> listInterfaces
case ns of
[] -> return $ Left ["no interfaces found"]
(x:xs) -> do
return $ Right $ PostPass x $ fmap ("ignoring extra interface: "++) xs
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vpnPresent :: IO (Maybe String)
vpnPresent = do
res <- tryIOError $ readProcessWithExitCode "nmcli" args ""
-- TODO provide some error messages
return $ case res of
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(Right (ExitSuccess, out, _)) -> if "vpn" `elem` lines out then Nothing else Just "vpn not found"
_ -> Just "puke"
where
args = ["-c", "no", "-t", "-f", "TYPE", "c", "show"]
rightPlugins :: Maybe Client -> Maybe Client -> IO [Maybe CmdSpec]
rightPlugins sysClient sesClient = mapM evalFeature
[ Left getWireless
, Left $ getEthernet sysClient
, Left $ getVPN sysClient
, Left $ getBt sysClient
, Left getAlsa
, Left getBattery
, Left $ getBl sesClient
, Left $ getCk sesClient
, Left $ getSs sesClient
, Right $ Always lockCmd
, Right $ Always dateCmd
]
getWireless :: BarFeature
getWireless = sometimes1 "wireless status indicator" $ IORoot wirelessCmd
$ Only $ readInterface "get wifi interface" isWireless
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getEthernet :: Maybe Client -> BarFeature
getEthernet client = sometimes1 "ethernet status indicator" $
DBusRoot (const . ethernetCmd) tree client
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where
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tree = And1 (Only readEth) (Only_ devDep)
readEth = readInterface "read ethernet interface" isEthernet
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getBattery :: BarFeature
getBattery = sometimesIO "battery level indicator"
(Only_ $ sysTest "Test if battery is present" hasBattery)
batteryCmd
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getVPN :: Maybe Client -> BarFeature
getVPN client = sometimesDBus client "VPN status indicator"
(toAnd vpnDep test) (const vpnCmd)
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where
test = DBusIO $ sysTest "Use nmcli to test if VPN is present" vpnPresent
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getBt :: Maybe Client -> BarFeature
getBt client = sometimesDBus client "bluetooth status indicator"
(Only_ btDep)
(const btCmd)
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getAlsa :: BarFeature
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getAlsa = sometimesIO "volume level indicator" (Only_ $ sysExe "alsactl") alsaCmd
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getBl :: Maybe Client -> BarFeature
getBl client = sometimesDBus client "Intel backlight indicator"
(Only_ intelBacklightSignalDep)
(const blCmd)
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getCk :: Maybe Client -> BarFeature
getCk client = sometimesDBus client "Clevo keyboard indicator"
(Only_ clevoKeyboardSignalDep)
(const ckCmd)
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getSs :: Maybe Client -> BarFeature
getSs client = sometimesDBus client "screensaver indicator"
(Only_ ssSignalDep) $ const ssCmd
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getAllCommands :: [Maybe CmdSpec] -> IO BarRegions
getAllCommands right = do
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let left =
[ CmdSpec
{ csAlias = "UnsafeStdinReader"
, csRunnable = Run UnsafeStdinReader
}
]
return $ BarRegions
{ brLeft = left
, brCenter = []
, brRight = catMaybes right
}
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--------------------------------------------------------------------------------
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-- | fonts
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data Font = Text
| IconSmall
| IconMedium
| IconLarge
| IconXLarge
deriving (Eq, Enum, Bounded, Show)
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-- font data ~ (offset, fontification string)
fontData :: Font -> (Int, String)
fontData Text = (16, barFont)
fontData IconSmall = (16, nerdFont 13)
fontData IconMedium = (17, nerdFont 15)
fontData IconLarge = (17, nerdFont 18)
fontData IconXLarge = (18, nerdFont 20)
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fontString :: Font -> String
fontString = snd . fontData
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fontOffset :: Font -> Int
fontOffset = fst . fontData
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allFonts :: [Font]
allFonts = enumFrom minBound
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allFontOffsets :: [Int]
allFontOffsets = fontOffset <$> allFonts
allFontStrings :: [String]
allFontStrings = fontString <$> allFonts
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barFont :: String
barFont = T.fmtFontXFT T.font
{ T.family = "DejaVu Sans Mono"
, T.size = Just 11
, T.weight = Just T.Bold
}
nerdFont :: Int -> String
nerdFont size = T.fmtFontXFT T.font
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{ T.family = "Symbols Nerd Font"
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, T.size = Nothing
, T.pixelsize = Just size
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}
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fontifyText :: Font -> String -> String
fontifyText fnt txt = concat ["<fn=", show $ fromEnum fnt, ">", txt, "</fn>"]
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--------------------------------------------------------------------------------
-- | various formatting things
colors :: Colors
colors = Colors { colorsOn = T.fgColor, colorsOff = T.backdropFgColor }
sep :: String
sep = xmobarFGColor T.backdropFgColor " : "
lSep :: Char
lSep = '}'
rSep :: Char
rSep = '{'
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pSep :: String
pSep = "%"
fmtSpecs :: [CmdSpec] -> String
fmtSpecs = intercalate sep . fmap go
where
go CmdSpec { csAlias = a } = wrap pSep pSep a
fmtRegions :: BarRegions -> String
fmtRegions BarRegions { brLeft = l, brCenter = c, brRight = r } =
fmtSpecs l ++ [lSep] ++ fmtSpecs c ++ [rSep] ++ fmtSpecs r