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

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