From 0691071716e6cfa6040044be0ca782771fe6104c Mon Sep 17 00:00:00 2001
From: jao <jao@gnu.org>
Date: Sun, 25 Nov 2018 03:40:55 +0000
Subject: Refactoring: Xmobar.System

---
 src/lib/Xmobar/Signal.hs | 132 -----------------------------------------------
 1 file changed, 132 deletions(-)
 delete mode 100644 src/lib/Xmobar/Signal.hs

(limited to 'src/lib/Xmobar/Signal.hs')

diff --git a/src/lib/Xmobar/Signal.hs b/src/lib/Xmobar/Signal.hs
deleted file mode 100644
index fd68e80..0000000
--- a/src/lib/Xmobar/Signal.hs
+++ /dev/null
@@ -1,132 +0,0 @@
-{-# LANGUAGE DeriveDataTypeable, CPP #-}
-
------------------------------------------------------------------------------
--- |
--- Module      :  Signal
--- Copyright   :  (c) Andrea Rosatto
---             :  (c) Jose A. Ortega Ruiz
---             :  (c) Jochen Keil
--- License     :  BSD-style (see LICENSE)
---
--- Maintainer  :  Jose A. Ortega Ruiz <jao@gnu.org>
--- Stability   :  unstable
--- Portability :  unportable
---
--- Signal handling, including DBUS when available
---
------------------------------------------------------------------------------
-
-module Xmobar.Signal where
-
-import Data.Foldable (for_)
-import Data.Typeable (Typeable)
-import Control.Concurrent
-import Control.Concurrent.STM
-import Control.Exception
-import System.Posix.Signals
-import Graphics.X11.Types (Button)
-import Graphics.X11.Xlib.Types (Position)
-import System.IO
-
-#ifdef DBUS
-import DBus (IsVariant(..))
-import Control.Monad ((>=>))
-#endif
-
-import Xmobar.Utils (safeHead)
-
-data WakeUp = WakeUp deriving (Show,Typeable)
-instance Exception WakeUp
-
-data SignalType = Wakeup
-                | Reposition
-                | ChangeScreen
-                | Hide   Int
-                | Reveal Int
-                | Toggle Int
-                | TogglePersistent
-                | Action Button Position
-    deriving (Read, Show)
-
-#ifdef DBUS
-instance IsVariant SignalType where
-    toVariant   = toVariant . show
-    fromVariant = fromVariant >=> parseSignalType
-#endif
-
-parseSignalType :: String -> Maybe SignalType
-parseSignalType = fmap fst . safeHead . reads
-
--- | Signal handling
-setupSignalHandler :: IO (TMVar SignalType)
-setupSignalHandler = do
-   tid   <- newEmptyTMVarIO
-   installHandler sigUSR2 (Catch $ updatePosHandler tid) Nothing
-   installHandler sigUSR1 (Catch $ changeScreenHandler tid) Nothing
-   return tid
-
-updatePosHandler :: TMVar SignalType -> IO ()
-updatePosHandler sig = do
-   atomically $ putTMVar sig Reposition
-   return ()
-
-changeScreenHandler :: TMVar SignalType -> IO ()
-changeScreenHandler sig = do
-   atomically $ putTMVar sig ChangeScreen
-   return ()
-
-
--- | Ensures that the given IO action runs its cleanup actions ('bracket' etc.),
--- even if a signal is caught.
---
--- An exception will be thrown on the thread that called this function when a
--- signal is caught.
-withDeferSignals :: IO a -> IO a
-withDeferSignals thing = do
-  threadId <- myThreadId
-  caughtSignal <- newEmptyMVar
-
-  let signals =
-        filter (not . flip inSignalSet reservedSignals)
-          [ sigQUIT
-          , sigTERM
-          --, sigINT -- Handler already installed by GHC
-          --, sigPIPE -- Handler already installed by GHC
-          --, sigUSR1 -- Handled by setupSignalHandler
-          --, sigUSR2 -- Handled by setupSignalHandler
-
-          -- One of the following appears to cause instability, see #360
-          --, sigHUP
-          --, sigILL
-          --, sigABRT
-          --, sigFPE
-          --, sigSEGV
-          --, sigALRM
-          --, sigBUS
-          --, sigPOLL
-          --, sigPROF
-          --, sigSYS
-          --, sigTRAP
-          --, sigVTALRM
-          --, sigXCPU
-          --, sigXFSZ
-          ]
-
-  for_ signals $ \s ->
-
-      installHandler s
-        (Catch $ do
-          tryPutMVar caughtSignal s
-          hPutStrLn stderr ("xmobar: Caught signal "++show s++"; exiting...")
-          throwTo threadId ThreadKilled)
-        Nothing
-
-  thing `finally` do
-        s0 <- tryReadMVar caughtSignal
-        case s0 of
-          Nothing -> pure ()
-          Just s -> do
-            -- Run the default handler for the signal
-            -- hPutStrLn stderr ("xmobar: Running default handler for signal "++show s)
-            installHandler s Default Nothing
-            raiseSignal s
-- 
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