xmonad-config/lib/XMonad/Internal/DBus/Control.hs

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{-# LANGUAGE ScopedTypeVariables #-}
--------------------------------------------------------------------------------
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-- High-level interface for managing XMonad's DBus
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module XMonad.Internal.DBus.Control
( Client
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, DBusState (..)
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, connectDBus
, connectDBusX
, disconnectDBus
, disconnectDBusX
, getDBusClient
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, withDBusClient
, withDBusClient_
, disconnect
, dbusExporters
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)
where
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import Control.Monad
import DBus
import DBus.Client
import Data.Internal.DBus
import Data.Internal.Dependency
import XMonad.Internal.DBus.Brightness.ClevoKeyboard
import XMonad.Internal.DBus.Brightness.IntelBacklight
import XMonad.Internal.DBus.Common
import XMonad.Internal.DBus.Screensaver
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-- | Current connections to the DBus (session and system buses)
data DBusState = DBusState
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{ dbSesClient :: Maybe SesClient
, dbSysClient :: Maybe SysClient
}
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-- | Connect to the DBus
connectDBus :: IO DBusState
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connectDBus = do
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ses <- getDBusClient
sys <- getDBusClient
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return DBusState {dbSesClient = ses, dbSysClient = sys}
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-- | Disconnect from the DBus
disconnectDBus :: DBusState -> IO ()
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disconnectDBus db = disc dbSesClient >> disc dbSysClient
where
disc f = maybe (return ()) disconnectDBusClient $ f db
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-- | Connect to the DBus and request the XMonad name
connectDBusX :: IO DBusState
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connectDBusX = do
db <- connectDBus
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forM_ (dbSesClient db) requestXMonadName
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return db
-- | Disconnect from DBus and release the XMonad name
disconnectDBusX :: DBusState -> IO ()
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disconnectDBusX db = do
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forM_ (dbSesClient db) releaseXMonadName
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disconnectDBus db
-- | All exporter features to be assigned to the DBus
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dbusExporters :: [Maybe SesClient -> SometimesIO]
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dbusExporters = [exportScreensaver, exportIntelBacklight, exportClevoKeyboard]
releaseXMonadName :: SesClient -> IO ()
releaseXMonadName ses = void $ releaseName (toClient ses) xmonadBusName
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requestXMonadName :: SesClient -> IO ()
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requestXMonadName ses = do
res <- requestName (toClient ses) xmonadBusName []
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-- TODO if the client is not released on shutdown the owner will be different
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let msg
| res == NamePrimaryOwner = Nothing
| res == NameAlreadyOwner = Just $ "this process already owns " ++ xn
| res == NameInQueue
|| res == NameExists =
Just $ "another process owns " ++ xn
| otherwise = Just $ "unknown error when requesting " ++ xn
forM_ msg putStrLn
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where
xn = "'" ++ formatBusName xmonadBusName ++ "'"