141 lines
4.3 KiB
Haskell
141 lines
4.3 KiB
Haskell
--------------------------------------------------------------------------------
|
|
-- | DBus module for DBus brightness controls
|
|
|
|
module XMonad.Internal.DBus.Brightness.Common
|
|
( BrightnessConfig(..)
|
|
, BrightnessControls(..)
|
|
, brightnessControls
|
|
, brightnessExporter
|
|
, callGetBrightness
|
|
, matchSignal
|
|
) where
|
|
|
|
import Control.Monad (void)
|
|
|
|
import Data.Int (Int32)
|
|
|
|
import DBus
|
|
import DBus.Client
|
|
|
|
import XMonad.Internal.DBus.Common
|
|
import XMonad.Internal.Dependency
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- | External API
|
|
--
|
|
-- Define four methods to increase, decrease, maximize, or minimize the
|
|
-- brightness. These methods will all return the current brightness as a 32-bit
|
|
-- integer and emit a signal with the same brightness value. Additionally, there
|
|
-- is one method to get the current brightness.
|
|
|
|
data BrightnessConfig a b = BrightnessConfig
|
|
{ bcMin :: a -> IO b
|
|
, bcMax :: a -> IO b
|
|
, bcDec :: a -> IO b
|
|
, bcInc :: a -> IO b
|
|
, bcGet :: a -> IO b
|
|
, bcGetMax :: IO a
|
|
, bcPath :: ObjectPath
|
|
, bcInterface :: InterfaceName
|
|
}
|
|
|
|
data BrightnessControls = BrightnessControls
|
|
{ bctlMax :: FeatureIO
|
|
, bctlMin :: FeatureIO
|
|
, bctlInc :: FeatureIO
|
|
, bctlDec :: FeatureIO
|
|
}
|
|
|
|
brightnessControls :: BrightnessConfig a b -> BrightnessControls
|
|
brightnessControls BrightnessConfig { bcPath = p, bcInterface = i } =
|
|
BrightnessControls
|
|
{ bctlMax = cb memMax
|
|
, bctlMin = cb memMin
|
|
, bctlInc = cb memInc
|
|
, bctlDec = cb memDec
|
|
}
|
|
where
|
|
cb = callBacklight p i
|
|
|
|
callGetBrightness :: Num c => BrightnessConfig a b -> IO (Maybe c)
|
|
callGetBrightness BrightnessConfig { bcPath = p, bcInterface = i } = do
|
|
reply <- callMethod $ methodCall p i memGet
|
|
return $ reply >>= bodyGetBrightness
|
|
|
|
matchSignal :: Num c => BrightnessConfig a b -> (Maybe c -> IO ()) -> IO SignalHandler
|
|
matchSignal BrightnessConfig { bcPath = p, bcInterface = i } cb = do
|
|
client <- connectSession
|
|
addMatch client brMatcher $ cb . bodyGetBrightness . signalBody
|
|
where
|
|
brMatcher = matchAny
|
|
{ matchPath = Just p
|
|
, matchInterface = Just i
|
|
, matchMember = Just memCur
|
|
}
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- | Internal DBus Crap
|
|
|
|
brightnessExporter :: RealFrac b => [Dependency] -> BrightnessConfig a b
|
|
-> Client -> FeatureIO
|
|
brightnessExporter deps bc client = Feature
|
|
{ ftrAction = exportBrightnessControls' bc client
|
|
, ftrSilent = False
|
|
, ftrChildren = deps
|
|
}
|
|
|
|
exportBrightnessControls' :: RealFrac b => BrightnessConfig a b -> Client -> IO ()
|
|
exportBrightnessControls' bc client = do
|
|
maxval <- bcGetMax bc -- assume the max value will never change
|
|
let autoMethod' m f = autoMethod m $ emitBrightness bc client =<< f bc maxval
|
|
let funget = bcGet bc
|
|
export client (bcPath bc) defaultInterface
|
|
{ interfaceName = bcInterface bc
|
|
, interfaceMethods =
|
|
[ autoMethod' memMax bcMax
|
|
, autoMethod' memMin bcMin
|
|
, autoMethod' memInc bcInc
|
|
, autoMethod' memDec bcDec
|
|
, autoMethod memGet (round <$> funget maxval :: IO Int32)
|
|
]
|
|
}
|
|
|
|
emitBrightness :: RealFrac b => BrightnessConfig a b -> Client -> b -> IO ()
|
|
emitBrightness BrightnessConfig{ bcPath = p, bcInterface = i } client cur =
|
|
emit client $ sig { signalBody = [toVariant (round cur :: Int32)] }
|
|
where
|
|
sig = signal p i memCur
|
|
|
|
callBacklight :: ObjectPath -> InterfaceName -> MemberName -> FeatureIO
|
|
callBacklight p i m =
|
|
Feature
|
|
{ ftrAction = void $ callMethod $ methodCall p i m
|
|
, ftrSilent = False
|
|
, ftrChildren = [xDbusDep p i $ Method_ m]
|
|
}
|
|
|
|
bodyGetBrightness :: Num a => [Variant] -> Maybe a
|
|
bodyGetBrightness [b] = fromIntegral <$> (fromVariant b :: Maybe Int32)
|
|
bodyGetBrightness _ = Nothing
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- | DBus Members
|
|
|
|
memCur :: MemberName
|
|
memCur = memberName_ "CurrentBrightness"
|
|
|
|
memGet :: MemberName
|
|
memGet = memberName_ "GetBrightness"
|
|
|
|
memMax :: MemberName
|
|
memMax = memberName_ "MaxBrightness"
|
|
|
|
memMin :: MemberName
|
|
memMin = memberName_ "MinBrightness"
|
|
|
|
memInc :: MemberName
|
|
memInc = memberName_ "IncBrightness"
|
|
|
|
memDec :: MemberName
|
|
memDec = memberName_ "DecBrightness"
|