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-- | DBus module for Intel Backlight control
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module XMonad.Internal.DBus.Brightness.IntelBacklight
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( callGetBrightnessIB
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, matchSignalIB
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, exportIntelBacklight
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, intelBacklightControls
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, curFileDep
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, maxFileDep
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, blPath
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) where
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import Data.Int (Int32)
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import DBus
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import DBus.Client
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import System.FilePath.Posix
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import XMonad.Internal.DBus.Brightness.Common
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import XMonad.Internal.Dependency
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import XMonad.Internal.IO
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--------------------------------------------------------------------------------
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-- | Low level sysfs functions
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--
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type Brightness = Float
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type RawBrightness = Int32
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steps :: Int
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steps = 16
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backlightDir :: FilePath
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backlightDir = "/sys/class/backlight/intel_backlight/"
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maxFile :: FilePath
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maxFile = backlightDir </> "max_brightness"
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curFile :: FilePath
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curFile = backlightDir </> "brightness"
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getMaxRawBrightness :: IO RawBrightness
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getMaxRawBrightness = readInt maxFile
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getBrightness :: RawBrightness -> IO Brightness
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getBrightness upper = readPercent upper curFile
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minBrightness :: RawBrightness -> IO Brightness
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minBrightness upper = writePercentMin upper curFile
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maxBrightness :: RawBrightness -> IO Brightness
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maxBrightness upper = writePercentMax upper curFile
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incBrightness :: RawBrightness -> IO Brightness
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incBrightness = incPercent steps curFile
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decBrightness :: RawBrightness -> IO Brightness
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decBrightness = decPercent steps curFile
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--------------------------------------------------------------------------------
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-- | DBus interface
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blPath :: ObjectPath
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blPath = objectPath_ "/intelbacklight"
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interface :: InterfaceName
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interface = interfaceName_ "org.xmonad.Brightness"
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intelBacklightConfig :: BrightnessConfig RawBrightness Brightness
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intelBacklightConfig = BrightnessConfig
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{ bcMin = minBrightness
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, bcMax = maxBrightness
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, bcInc = incBrightness
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, bcDec = decBrightness
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, bcGet = getBrightness
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, bcGetMax = getMaxRawBrightness
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, bcPath = blPath
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, bcInterface = interface
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}
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--------------------------------------------------------------------------------
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-- | Exported haskell API
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curFileDep :: Dependency
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curFileDep = pathRW curFile
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maxFileDep :: Dependency
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maxFileDep = pathR maxFile
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exportIntelBacklight :: Client -> FeatureIO
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exportIntelBacklight =
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brightnessExporter [curFileDep, maxFileDep] intelBacklightConfig
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intelBacklightControls :: BrightnessControls
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intelBacklightControls = brightnessControls intelBacklightConfig
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callGetBrightnessIB :: IO (Maybe Brightness)
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callGetBrightnessIB = callGetBrightness intelBacklightConfig
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matchSignalIB :: (Maybe Brightness -> IO ()) -> IO SignalHandler
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matchSignalIB = matchSignal intelBacklightConfig
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