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

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{-# LANGUAGE OverloadedStrings #-}
--------------------------------------------------------------------------------
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-- DBus module for Intel Backlight control
module XMonad.Internal.DBus.Brightness.IntelBacklight
( callGetBrightnessIB
, matchSignalIB
, exportIntelBacklight
, intelBacklightControls
, intelBacklightSignalDep
, blPath
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)
where
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import DBus
import Data.Internal.DBus
import Data.Internal.Dependency
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import RIO
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import RIO.FilePath
import XMonad.Internal.DBus.Brightness.Common
import XMonad.Internal.IO
--------------------------------------------------------------------------------
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-- Low level sysfs functions
type Brightness = Float
type RawBrightness = Int32
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type RawBounds = (RawBrightness, RawBrightness)
steps :: Int
steps = 16
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minRawBrightness :: RawBrightness
minRawBrightness = 1
backlightDir :: FilePath
backlightDir = "/sys/class/backlight/intel_backlight/"
maxFile :: FilePath
maxFile = backlightDir </> "max_brightness"
curFile :: FilePath
curFile = backlightDir </> "brightness"
getMaxRawBrightness :: IO RawBrightness
getMaxRawBrightness = readInt maxFile
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getBrightness :: RawBounds -> IO Brightness
getBrightness bounds = readPercent bounds curFile
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minBrightness :: RawBounds -> IO Brightness
minBrightness bounds = writePercentMin bounds curFile
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maxBrightness :: RawBounds -> IO Brightness
maxBrightness bounds = writePercentMax bounds curFile
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incBrightness :: RawBounds -> IO Brightness
incBrightness = incPercent steps curFile
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decBrightness :: RawBounds -> IO Brightness
decBrightness = decPercent steps curFile
--------------------------------------------------------------------------------
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-- DBus interface
blPath :: ObjectPath
blPath = objectPath_ "/intelbacklight"
interface :: InterfaceName
interface = interfaceName_ "org.xmonad.Brightness"
intelBacklightConfig :: BrightnessConfig RawBrightness Brightness
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intelBacklightConfig =
BrightnessConfig
{ bcMin = minBrightness
, bcMax = maxBrightness
, bcInc = incBrightness
, bcDec = decBrightness
, bcGet = getBrightness
, bcGetMax = getMaxRawBrightness
, bcMinRaw = minRawBrightness
, bcPath = blPath
, bcInterface = interface
, bcName = "Intel backlight"
}
--------------------------------------------------------------------------------
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-- Exported haskell API
curFileDep :: IODependency_
curFileDep = pathRW curFile []
maxFileDep :: IODependency_
maxFileDep = pathR maxFile []
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intelBacklightSignalDep :: DBusDependency_ SesClient
intelBacklightSignalDep = signalDep intelBacklightConfig
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exportIntelBacklight :: Maybe SesClient -> SometimesIO
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exportIntelBacklight =
brightnessExporter
xpfIntelBacklight
[]
[curFileDep, maxFileDep]
intelBacklightConfig
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intelBacklightControls :: Maybe SesClient -> BrightnessControls
intelBacklightControls = brightnessControls xpfIntelBacklight intelBacklightConfig
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callGetBrightnessIB :: MonadUnliftIO m => SesClient -> m (Maybe Brightness)
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callGetBrightnessIB = callGetBrightness intelBacklightConfig
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matchSignalIB
:: MonadUnliftIO m
=> (Maybe Brightness -> m ())
-> SesClient
-> m ()
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matchSignalIB = matchSignal intelBacklightConfig