128 lines
3.5 KiB
Haskell
128 lines
3.5 KiB
Haskell
module Xmobar.Plugins.Common
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( colorText
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, startListener
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, procSignalMatch
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, na
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, fromSingletonVariant
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, withNestedDBusClientConnection
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, withDBusClientConnection
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, Callback
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, Colors (..)
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, displayMaybe
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, displayMaybe'
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, xmobarFGColor
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, PluginEnv (..)
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, PluginIO
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, pluginDisplay
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)
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where
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import DBus
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import DBus.Client
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import Data.Internal.DBus
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import Data.Internal.XIO
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import RIO
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import qualified RIO.Text as T
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import XMonad.Hooks.DynamicLog (xmobarColor)
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data PluginEnv s c = PluginEnv
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{ plugClient :: !c
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, plugState :: !(MVar s)
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, plugDisplay :: !(Callback -> PluginIO s c ())
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, plugCallback :: !Callback
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, plugEnv :: !SimpleApp
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}
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pluginDisplay :: PluginIO s c ()
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pluginDisplay = do
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cb <- asks plugCallback
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dpy <- asks plugDisplay
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dpy cb
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type PluginIO s c = RIO (PluginEnv s c)
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instance HasClient (PluginEnv s) where
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clientL = lens plugClient (\x y -> x {plugClient = y})
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instance HasLogFunc (PluginEnv s c) where
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logFuncL = lens plugEnv (\x y -> x {plugEnv = y}) . logFuncL
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-- use string here since all the callbacks in xmobar use strings :(
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type Callback = String -> IO ()
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data Colors = Colors
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{ colorsOn :: T.Text
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, colorsOff :: T.Text
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}
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deriving (Eq, Show, Read)
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startListener
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:: ( HasClient env
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, MonadReader (env c) m
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, MonadUnliftIO m
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, SafeClient c
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, IsVariant a
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)
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=> MatchRule
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-> m [Variant]
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-> ([Variant] -> SignalMatch a)
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-> (a -> m T.Text)
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-> Callback
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-> m ()
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startListener rule getProp fromSignal toColor cb = do
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reply <- getProp
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displayMaybe cb toColor $ fromSingletonVariant reply
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void $ addMatchCallback rule (procMatch . fromSignal)
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where
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procMatch = procSignalMatch cb toColor
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procSignalMatch
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:: MonadUnliftIO m => Callback -> (a -> m T.Text) -> SignalMatch a -> m ()
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procSignalMatch cb f = withSignalMatch (displayMaybe cb f)
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colorText :: Colors -> Bool -> T.Text -> T.Text
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colorText Colors {colorsOn = c} True = xmobarFGColor c
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colorText Colors {colorsOff = c} False = xmobarFGColor c
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xmobarFGColor :: T.Text -> T.Text -> T.Text
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xmobarFGColor c = T.pack . xmobarColor (T.unpack c) "" . T.unpack
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na :: T.Text
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na = "N/A"
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displayMaybe :: MonadUnliftIO m => Callback -> (a -> m T.Text) -> Maybe a -> m ()
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displayMaybe cb f = (liftIO . cb . T.unpack) <=< maybe (return na) f
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displayMaybe' :: MonadUnliftIO m => Callback -> (a -> m ()) -> Maybe a -> m ()
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displayMaybe' cb = maybe (liftIO $ cb $ T.unpack na)
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withDBusClientConnection
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:: (MonadUnliftIO m, SafeClient c)
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=> Callback
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-> Maybe FilePath
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-> (c -> RIO SimpleApp ())
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-> m ()
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withDBusClientConnection cb logfile f =
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maybe (run stderr) (`withLogFile` run) logfile
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where
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run h = do
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logOpts <- setLogVerboseFormat True . setLogUseTime True <$> logOptionsHandle h False
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withLogFunc logOpts $ \lf -> do
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env <- mkSimpleApp lf Nothing
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runRIO env $ displayMaybe' cb f =<< getDBusClient
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-- | Run a plugin action with a new DBus client and logfile path.
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-- This is necessary for DBus callbacks which run in separate threads, which
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-- will usually fire when the parent thread already exited and killed off its
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-- DBus connection and closed its logfile.
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withNestedDBusClientConnection
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:: (MonadUnliftIO m, SafeClient c, MonadReader (PluginEnv s c) m)
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=> Maybe FilePath
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-> PluginIO s c ()
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-> m ()
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withNestedDBusClientConnection logfile f = do
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dpy <- asks plugDisplay
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s <- asks plugState
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cb <- asks plugCallback
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withDBusClientConnection cb logfile $ \c -> mapRIO (PluginEnv c s dpy cb) f
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