summaryrefslogtreecommitdiffhomepage
diff options
context:
space:
mode:
authorJochen Keil <jochen.keil@gmail.com>2012-08-10 11:35:35 +0200
committerJochen Keil <jochen.keil@gmail.com>2012-08-10 11:35:35 +0200
commita7158c426ae008fb268f603f75d027683f726757 (patch)
treea7670c6ede358b8501c0a87c064346ec1ca39ed5
parentf51060e267f4f79ed18e4a4ffe93dad2cbeb85f0 (diff)
downloadxmobar-a7158c426ae008fb268f603f75d027683f726757.tar.gz
xmobar-a7158c426ae008fb268f603f75d027683f726757.tar.bz2
Add an initial (working) version of the DBus IPC module
-rw-r--r--src/IPC/DBus.hs66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/IPC/DBus.hs b/src/IPC/DBus.hs
new file mode 100644
index 0000000..64e3cca
--- /dev/null
+++ b/src/IPC/DBus.hs
@@ -0,0 +1,66 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : DBus
+-- Copyright : (c) Jochen Keil
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Jochen Keil <jochen dot keil at gmail dot com>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- DBus IPC module for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module IPC.DBus ( runIPC ) where
+
+import DBus
+import DBus.Client
+import Control.Monad ((>=>), join, when)
+import Control.Concurrent
+
+import Signal
+
+safeHead :: [a] -> Maybe a
+safeHead [] = Nothing
+safeHead (x:_) = Just x
+
+instance IsVariant SignalType where
+ toVariant = toVariant . show
+ fromVariant = fromVariant >=> parseSignalType
+
+parseSignalType :: String -> Maybe SignalType
+parseSignalType = fmap fst . safeHead . reads
+
+busName :: BusName
+busName = busName_ "org.Xmobar.Control"
+
+objectPath :: ObjectPath
+objectPath = objectPath_ "/org/Xmobar/Control"
+
+interfaceName :: InterfaceName
+interfaceName = interfaceName_ "org.Xmobar.Control"
+
+runIPC :: MVar SignalType -> IO ()
+runIPC mvst = do
+ client <- connectSession
+ requestName client busName [ nameDoNotQueue ]
+ export client objectPath [ sendSignalMethod mvst ]
+
+sendSignalMethod :: MVar SignalType -> Method
+sendSignalMethod mvst = method interfaceName sendSignalName
+ (signature_ [variantType $ toVariant $ (undefined :: SignalType)])
+ (signature_ [])
+ sendSignalMethodCall
+ where
+ sendSignalName :: MemberName
+ sendSignalName = memberName_ "SendSignal"
+
+ sendSignalMethodCall :: MethodCall -> IO Reply
+ sendSignalMethodCall mc = do
+ when ( methodCallMember mc == sendSignalName ) $ sendSignal $
+ join $ safeHead $ map fromVariant $ methodCallBody mc
+ return ( replyReturn [] )
+
+ sendSignal :: Maybe SignalType -> IO ()
+ sendSignal = maybe (return ()) (putMVar mvst)