ENH generalize brightness

lib/XMonad/Internal/DBus/Brightness/Common.hs

@@ -14,13 +14,12 @@ module XMonad.Internal.DBus.Brightness.Common
   )
 where
 
-import Control.Monad (void)
 import DBus
 import DBus.Client
 import qualified DBus.Introspection as I
-import Data.Int (Int32)
 import Data.Internal.DBus
 import Data.Internal.Dependency
+import RIO
 import qualified RIO.Text as T
 import XMonad.Core (io)
 import XMonad.Internal.DBus.Common
@@ -69,10 +68,10 @@ brightnessControls q bc cl =
     cb = callBacklight q cl bc
 
 callGetBrightness
-  :: (SafeClient c, Num n)
+  :: (MonadUnliftIO m, SafeClient c, Num n)
   => BrightnessConfig a b
   -> c
-  -> IO (Maybe n)
+  -> m (Maybe n)
 callGetBrightness BrightnessConfig {bcPath = p, bcInterface = i} client =
   either (const Nothing) bodyGetBrightness
     <$> callMethod client xmonadBusName p i memGet
@@ -82,11 +81,11 @@ signalDep BrightnessConfig {bcPath = p, bcInterface = i} =
   Endpoint [] xmonadBusName p i $ Signal_ memCur
 
 matchSignal
-  :: (SafeClient c, Num n)
+  :: (MonadUnliftIO m, SafeClient c, Num n)
   => BrightnessConfig a b
-  -> (Maybe n -> IO ())
+  -> (Maybe n -> m ())
   -> c
-  -> IO ()
+  -> m ()
 matchSignal BrightnessConfig {bcPath = p, bcInterface = i} cb =
   void . addMatchCallback brMatcher (cb . bodyGetBrightness)
   where
@@ -148,9 +147,14 @@ exportBrightnessControls' bc cl = io $ do
             ]
         }
 
-emitBrightness :: RealFrac b => BrightnessConfig a b -> Client -> b -> IO ()
+emitBrightness
+  :: (MonadUnliftIO m, RealFrac b)
+  => BrightnessConfig a b
+  -> Client
+  -> b
+  -> m ()
 emitBrightness BrightnessConfig {bcPath = p, bcInterface = i} client cur =
-  emit client $ sig {signalBody = [toVariant (round cur :: Int32)]}
+  liftIO $ emit client $ sig {signalBody = [toVariant (round cur :: Int32)]}
   where
     sig = signal p i memCur