52 lines
1.5 KiB
Haskell
52 lines
1.5 KiB
Haskell
--------------------------------------------------------------------------------
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-- | Common internal DBus functions
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module XMonad.Internal.DBus.Common
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( callMethod
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, callMethod'
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, addMatchCallback
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, xmonadBus
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, initControls
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) where
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import DBus
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import DBus.Client
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import XMonad.Internal.Dependency
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xmonadBus :: BusName
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xmonadBus = busName_ "org.xmonad"
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-- | Call a method and return its result if successful
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callMethod :: MethodCall -> IO (Maybe [Variant])
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callMethod mc = do
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client <- connectSession
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r <- callMethod' client (Just xmonadBus) mc
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disconnect client
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return r
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callMethod' :: Client -> Maybe BusName -> MethodCall -> IO (Maybe [Variant])
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callMethod' client bn mc = do
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-- TODO handle clienterrors here
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reply <- call client mc { methodCallDestination = bn }
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-- TODO not all methods warrant that we wait for a reply? (see callNoReply)
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return $ case reply of
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Left _ -> Nothing
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Right ret -> Just $ methodReturnBody ret
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-- | Bind a callback to a signal match rule
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addMatchCallback :: MatchRule -> ([Variant] -> IO ()) -> IO SignalHandler
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addMatchCallback rule cb = do
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client <- connectSession
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addMatch client rule $ cb . signalBody
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initControls :: Client -> (Client -> Feature (IO ()) (IO ()))
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-> (Feature (IO ()) (IO ()) -> IO a) -> IO a
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initControls client exporter controls = do
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let x = exporter client
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e <- evalFeature x
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case e of
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(Installed c _) -> c
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_ -> return ()
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controls x
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