xmonad-config/lib/Xmobar/Plugins/Device.hs

74 lines
2.2 KiB
Haskell

module Xmobar.Plugins.Device
( Device(..)
, devDep
) where
--------------------------------------------------------------------------------
-- | Devince plugin
--
-- Display different text depending on whether or not the interface has
-- connectivity
import Control.Monad
import Data.Word
import DBus
import DBus.Client
import DBus.Internal
import XMonad.Internal.Dependency
import Xmobar
import Xmobar.Plugins.Common
newtype Device = Device (String, String, Colors) deriving (Read, Show)
nmBus :: BusName
nmBus = busName_ "org.freedesktop.NetworkManager"
nmPath :: ObjectPath
nmPath = objectPath_ "/org/freedesktop/NetworkManager"
nmInterface :: InterfaceName
nmInterface = interfaceName_ "org.freedesktop.NetworkManager"
nmDeviceInterface :: InterfaceName
nmDeviceInterface = interfaceName_ "org.freedesktop.NetworkManager.Device"
getByIP :: MemberName
getByIP = memberName_ "GetDeviceByIpIface"
devSignal :: String
devSignal = "Ip4Connectivity"
devDep :: DBusDep
devDep = Endpoint nmBus nmPath nmInterface $ Method_ getByIP
getDevice :: Client -> String -> IO (Maybe ObjectPath)
getDevice client iface = bodyToMaybe <$> callMethod' client mc
where
mc = (methodCallBus nmBus nmPath nmInterface getByIP)
{ methodCallBody = [toVariant iface]
}
getDeviceConnected :: ObjectPath -> Client -> IO [Variant]
getDeviceConnected path = callPropertyGet nmBus path nmDeviceInterface
$ memberName_ devSignal
matchStatus :: [Variant] -> SignalMatch Word32
matchStatus = matchPropertyChanged nmDeviceInterface devSignal
instance Exec Device where
alias (Device (iface, _, _)) = iface
start (Device (iface, text, colors)) cb = do
withDBusClientConnection True cb $ \client -> do
path <- getDevice client iface
displayMaybe' cb (listener client) path
where
listener client path = do
rule <- matchPropertyFull client nmBus (Just path)
-- TODO warn the user here rather than silently drop the listener
forM_ rule $ \r ->
startListener r (getDeviceConnected path) matchStatus chooseColor' cb client
chooseColor' = return . (\s -> colorText colors s text) . (> 1)