xmonad-config/lib/XMonad/Internal/DBus/Brightness/ClevoKeyboard.hs

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--------------------------------------------------------------------------------
-- | DBus module for Clevo Keyboard control
module XMonad.Internal.DBus.Brightness.ClevoKeyboard
( callGetBrightnessCK
, matchSignalCK
, exportClevoKeyboard
, clevoKeyboardControls
, clevoKeyboardSignalDep
, blPath
) where
import Control.Monad (when)
import Data.Int (Int32)
import DBus
import DBus.Client
import System.FilePath.Posix
import XMonad.Internal.DBus.Brightness.Common
import XMonad.Internal.Dependency
import XMonad.Internal.IO
--------------------------------------------------------------------------------
-- | Low level sysfs functions
--
type Brightness = Float
type RawBrightness = Int32
type RawBounds = (RawBrightness, RawBrightness)
steps :: Int
steps = 16
-- assume this is hardcoded into the driver and will never change
maxRawBrightness :: RawBrightness
maxRawBrightness = 255
minRawBrightness :: RawBrightness
minRawBrightness = 0
backlightDir :: FilePath
backlightDir = "/sys/devices/platform/tuxedo_keyboard"
stateFile :: FilePath
stateFile = backlightDir </> "state"
stateChange :: Bool -> IO ()
stateChange = writeBool stateFile
stateOn :: IO ()
stateOn = stateChange True
stateOff :: IO ()
stateOff = stateChange False
brightnessFile :: FilePath
brightnessFile = backlightDir </> "brightness"
getBrightness :: RawBounds -> IO Brightness
getBrightness bounds = readPercent bounds brightnessFile
minBrightness :: RawBounds -> IO Brightness
minBrightness bounds = do
b <- writePercentMin bounds brightnessFile
stateOff
return b
maxBrightness :: RawBounds -> IO Brightness
maxBrightness bounds = stateOn >> writePercentMax bounds brightnessFile
incBrightness :: RawBounds -> IO Brightness
incBrightness bounds = stateOn >> incPercent steps brightnessFile bounds
decBrightness :: RawBounds -> IO Brightness
decBrightness bounds = do
b <- decPercent steps brightnessFile bounds
when (b == 0) stateOff
return b
--------------------------------------------------------------------------------
-- | DBus interface
blPath :: ObjectPath
blPath = objectPath_ "/clevo_keyboard"
interface :: InterfaceName
interface = interfaceName_ "org.xmonad.Brightness"
clevoKeyboardConfig :: BrightnessConfig RawBrightness Brightness
clevoKeyboardConfig = BrightnessConfig
{ bcMin = minBrightness
, bcMax = maxBrightness
, bcInc = incBrightness
, bcDec = decBrightness
, bcGet = getBrightness
, bcGetMax = return maxRawBrightness
, bcMinRaw = minRawBrightness
, bcPath = blPath
, bcInterface = interface
, bcName = "Clevo keyboard"
}
--------------------------------------------------------------------------------
-- | Exported haskell API
stateFileDep :: IODependency_
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stateFileDep = pathRW stateFile
brightnessFileDep :: IODependency_
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brightnessFileDep = pathR brightnessFile
clevoKeyboardSignalDep :: DBusDependency_
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clevoKeyboardSignalDep = signalDep clevoKeyboardConfig
exportClevoKeyboard :: Maybe Client -> SometimesIO
exportClevoKeyboard = brightnessExporter xpfClevoBacklight
[stateFileDep, brightnessFileDep] clevoKeyboardConfig
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clevoKeyboardControls :: Maybe Client -> BrightnessControls
clevoKeyboardControls = brightnessControls xpfClevoBacklight clevoKeyboardConfig
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callGetBrightnessCK :: Client -> IO (Maybe Brightness)
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callGetBrightnessCK = callGetBrightness clevoKeyboardConfig
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matchSignalCK :: (Maybe Brightness -> IO ()) -> Client -> IO ()
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matchSignalCK = matchSignal clevoKeyboardConfig