dbus-client (empty) → 0.1
raw patch · 6 files changed
+1713/−0 lines, 6 filesdep +basedep +containersdep +dbus-coresetup-changed
Dependencies added: base, containers, dbus-core, text
Files
- License.txt +674/−0
- Makefile +18/−0
- Setup.hs +2/−0
- dbus-client.cabal +34/−0
- dbus-client.nw +570/−0
- hs/DBus/Client.hs +415/−0
+ License.txt view
@@ -0,0 +1,674 @@+ GNU GENERAL PUBLIC LICENSE+ Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++ Preamble++ The GNU General Public License is a free, copyleft license for+software and other kinds of works.++ The licenses for most software and other practical works are designed+to take away your freedom to share and change the works. By contrast,+the GNU General Public License is intended to guarantee your freedom to+share and change all versions of a program--to make sure it remains free+software for all its users. We, the Free Software Foundation, use the+GNU General Public License for most of our software; it applies also to+any other work released this way by its authors. You can apply it to+your programs, too.++ When we speak of free software, we are referring to freedom, not+price. 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+ Makefile view
@@ -0,0 +1,18 @@+HS_SOURCES=hs/DBus/Client.hs++all: $(HS_SOURCES)++%.tex: %.nw+ noweave -delay "$<" | cpif "$@"++hs/%.hs: dbus-client.nw hs/DBus+ notangle -R"$*.hs" "$<" | cpif "$@"++hs/DBus:+ mkdir -p hs/DBus++%.pdf: %.tex+ xelatex "$<"+ xelatex "$<"++pdfs: dbus-client.pdf manual.pdf
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ dbus-client.cabal view
@@ -0,0 +1,34 @@+name: dbus-client+version: 0.1+synopsis: D-Bus client libraries+description: Connect and interact with the D-Bus IPC system.+license: GPL+license-file: License.txt+author: John Millikin+maintainer: jmillikin@gmail.com+build-type: Simple+cabal-version: >=1.6+category: Network, Desktop+stability: experimental+bug-reports: mailto:jmillikin@gmail.com++extra-source-files:+ dbus-client.nw+ Makefile++source-repository head+ type: darcs+ location: http://patch-tag.com/r/jmillikin/dbus-client/pullrepo++library+ ghc-options: -Wall+ hs-source-dirs: hs++ build-depends:+ base >=3 && < 5+ , dbus-core >= 0.5+ , containers+ , text++ exposed-modules:+ DBus.Client
+ dbus-client.nw view
@@ -0,0 +1,570 @@++% Copyright (C) 2009 John Millikin <jmillikin@gmail.com>+% +% This program is free software: you can redistribute it and/or modify+% it under the terms of the GNU General Public License as published by+% the Free Software Foundation, either version 3 of the License, or+% any later version.+% +% This program is distributed in the hope that it will be useful,+% but WITHOUT ANY WARRANTY; without even the implied warranty of+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the+% GNU General Public License for more details.+% +% You should have received a copy of the GNU General Public License+% along with this program. If not, see <http://www.gnu.org/licenses/>.++\documentclass[12pt]{article}++\usepackage{color}+\usepackage{hyperref}+\usepackage{noweb}++% Smaller margins+\usepackage[left=1.5cm,top=2cm,right=1.5cm,nohead,nofoot]{geometry}++% Remove boxes from hyperlinks+\hypersetup{+ colorlinks,+ linkcolor=blue,+}++\makeindex++\begin{document}++\addcontentsline{toc}{section}{Contents}+\tableofcontents++@+\section{Introduction}++This library provides a simplified, high-level interface for use by D-Bus+clients. It implements async operations, remote object proxies, and+local object exporting.++All source code is licensed under the terms of the GNU GPL v3 or later.++<<copyright>>=+{-+ Copyright (C) 2009 John Millikin <jmillikin@gmail.com>+ + This program is free software: you can redistribute it and/or modify+ it under the terms of the GNU General Public License as published by+ the Free Software Foundation, either version 3 of the License, or+ any later version.+ + This program is distributed in the hope that it will be useful,+ but WITHOUT ANY WARRANTY; without even the implied warranty of+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the+ GNU General Public License for more details.+ + You should have received a copy of the GNU General Public License+ along with this program. If not, see <http://www.gnu.org/licenses/>.+-}+++@+\section{Clients}++<<DBus/Client.hs>>=+<<copyright>>+{-# LANGUAGE OverloadedStrings #-}+module DBus.Client+ ( <<exports>>+ ) where+<<imports>>++<<imports>>=+import qualified Control.Concurrent.MVar as MV+import qualified Data.Map as Map+import qualified DBus.Connection as C+import qualified DBus.Constants as Const+import qualified DBus.Message as M+import qualified DBus.Types as T++<<DBus/Client.hs>>=+type Callback = (M.ReceivedMessage -> IO ())++data Client = Client C.Connection+ (MV.MVar (Map.Map M.Serial Callback))+ (MV.MVar (Map.Map T.ObjectPath Callback))+ (MV.MVar [Callback])++clientConnection :: Client -> C.Connection+clientConnection (Client x _ _ _) = x++<<exports>>=+ Client+, clientConnection++<<DBus/Client.hs>>=+mkClient :: IO (C.Connection, T.BusName) -> IO Client+mkClient getBus = do+ (c, _) <- getBus+ replies <- MV.newMVar Map.empty+ exports <- MV.newMVar Map.empty+ signals <- MV.newMVar []+ let client = Client c replies exports signals+ <<initialize client>>+ return client++<<exports>>=+, mkClient++<<DBus/Client.hs>>=+send' :: M.Message a => C.Connection -> (M.Serial -> IO b) -> a+ -> IO b+send' c f msg = C.send c f msg >>= \result -> case result of+ Left x -> error $ show x+ Right x -> return x++@+\section{Name reservation}++@ A client can request a ``well-known'' name from the bus. This allows+messages sent to that name to be received by the client, without senders+being aware of which application is actually handling requests.++<<DBus/Client.hs>>=+data RequestNameFlag+ = AllowReplacement+ | ReplaceExisting+ | DoNotQueue+ deriving (Show)++<<DBus/Client.hs>>=+data RequestNameReply+ = PrimaryOwner+ | InQueue+ | Exists+ | AlreadyOwner+ deriving (Show)++<<DBus/Client.hs>>=+data ReleaseNameReply+ = Released+ | NonExistent+ | NotOwner+ deriving (Show)++<<exports>>=+, RequestNameFlag (..)+, RequestNameReply (..)+, ReleaseNameReply (..)++@ All name requests are handled by the main bus service, which has names+provided by the {\tt DBus.Constants} module.++<<DBus/Client.hs>>=+dbus :: Proxy+dbus = Proxy (RemoteObject Const.dbusName Const.dbusPath) Const.dbusInterface++@ There are only two methods of interest here, {\tt RequestName} and+{\tt ReleaseName}.++<<DBus/Client.hs>>=+request, release :: T.MemberName+request = T.mkMemberName' "RequestName"+release = T.mkMemberName' "ReleaseName"++@ A name may be requested for any client, using the given flags. The bus's+reply will be returned, or an exception raised if the reply was invalid.++<<DBus/Client.hs>>=+requestName :: Client -> T.BusName -> [RequestNameFlag] -> IO RequestNameReply+requestName client name flags = do+ returned <- callBlocking client dbus request []+ [ T.toVariant name+ , T.toVariant . encodeFlags $ flags]+ + let reply = M.messageBody returned !! 0+ case decodeRequestReply =<< T.fromVariant reply of+ Just x -> return x+ Nothing -> error $ "Unknown request name reply: " +++ show reply++<<exports>>=+, requestName++@ Releasing a name is similar, except there's no flags for releasing a name.++<<DBus/Client.hs>>=+releaseName :: Client -> T.BusName -> IO ReleaseNameReply+releaseName client name = do+ returned <- callBlocking client dbus release [] [T.toVariant name]+ + let reply = M.messageBody returned !! 0+ case decodeReleaseReply =<< T.fromVariant reply of+ Just x -> return x+ Nothing -> error $ "Unknown release name reply: " +++ show reply++<<exports>>=+, releaseName++<<imports>>=+import Data.Word (Word32)+import Data.Bits ((.|.))++<<DBus/Client.hs>>=+encodeFlags :: [RequestNameFlag] -> Word32+encodeFlags = foldr (.|.) 0 . map flagValue where+ flagValue AllowReplacement = 0x1+ flagValue ReplaceExisting = 0x2+ flagValue DoNotQueue = 0x4++<<DBus/Client.hs>>=+decodeRequestReply :: Word32 -> Maybe RequestNameReply+decodeRequestReply 1 = Just PrimaryOwner+decodeRequestReply 2 = Just InQueue+decodeRequestReply 3 = Just Exists+decodeRequestReply 4 = Just AlreadyOwner+decodeRequestReply _ = Nothing++<<DBus/Client.hs>>=+decodeReleaseReply :: Word32 -> Maybe ReleaseNameReply+decodeReleaseReply 1 = Just Released+decodeReleaseReply 2 = Just NonExistent+decodeReleaseReply 3 = Just NotOwner+decodeReleaseReply _ = Nothing++@+\section{Receiving messages}++Each client runs a separate thread for receiving messages, and every callback+is called in a separate thread. This allows callbacks to perform long+computations without blocking receipt of other messages.++<<imports>>=+import Control.Concurrent (forkIO)+import Control.Monad (forever)+import qualified Data.Set as Set++<<initialize client>>=+forkIO $ forever (receiveMessages client)++<<DBus/Client.hs>>=+receiveMessages :: Client -> IO ()+receiveMessages client@(Client c _ _ _) = do+ received <- C.receive c+ msg <- case received of+ Left x -> error $ show x+ Right x -> return x+ case msg of+ (M.ReceivedMethodCall _ _ _ ) -> gotMethodCall client msg+ (M.ReceivedMethodReturn _ _ msg') -> gotReply client (M.methodReturnSerial msg') msg+ (M.ReceivedError _ _ msg') -> gotReply client (M.errorSerial msg') msg+ (M.ReceivedSignal _ _ _ ) -> gotSignal client msg+ _ -> return ()++<<DBus/Client.hs>>=+gotMethodCall :: Client -> M.ReceivedMessage -> IO ()+gotMethodCall client@(Client _ _ mvar _) msg = do+ objects <- MV.readMVar mvar+ let M.ReceivedMethodCall _ _ call' = msg+ case Map.lookup (M.methodCallPath call') objects of+ Just x -> x msg+ Nothing -> unknownMethod client msg++<<DBus/Client.hs>>=+unknownMethod :: Client -> M.ReceivedMessage -> IO ()+unknownMethod client msg = send' c (const $ return ()) errorMsg where+ M.ReceivedMethodCall serial sender _ = msg+ c = clientConnection client+ errorMsg = M.Error+ Const.errorUnknownMethod+ serial sender+ (Set.fromList [M.NoReplyExpected, M.NoAutoStart])+ []++@ Method returns and errors both have a serial attached, which is used to+find the proper callback. If the callback cannot be found, no action will+be taken.++<<imports>>=+import Data.Maybe (isJust, fromJust, isNothing)++<<DBus/Client.hs>>=+gotReply :: Client -> M.Serial -> M.ReceivedMessage -> IO ()+gotReply (Client _ mvar _ _) serial msg = do+ callback <- MV.modifyMVar mvar $ \callbacks -> let+ x = Map.lookup serial callbacks+ callbacks' = if isJust x+ then Map.delete serial callbacks+ else callbacks+ in return (callbacks', x)+ case callback of+ Just x -> forkIO (x msg) >> return ()+ Nothing -> return ()++<<DBus/Client.hs>>=+gotSignal :: Client -> M.ReceivedMessage -> IO ()+gotSignal (Client _ _ _ mvar) msg = MV.withMVar mvar $+ mapM_ (\cb -> forkIO (cb msg))++@ \subsection{Signals}++<<DBus/Client.hs>>=+onSignal :: Client+ -> (T.BusName -> M.Signal -> Bool)+ -> (T.BusName -> M.Signal -> IO ())+ -> IO ()+onSignal (Client _ _ _ mvar) test callback = MV.modifyMVar_ mvar addCallback where+ addCallback callbacks = return $ callback' : callbacks+ callback' (M.ReceivedSignal _ sender msg) =+ if test (fromJust sender) msg+ then callback (fromJust sender) msg+ else return ()+ callback' _ = undefined++<<DBus/Client.hs>>=+signalFilter :: Maybe T.BusName -> Maybe T.ObjectPath -> Maybe T.InterfaceName+ -> Maybe T.MemberName -> T.BusName -> M.Signal -> Bool+signalFilter sender path iface member sender' msg = all id+ [ isNothing sender || sender == Just sender'+ , isNothing path || path == Just (M.signalPath msg)+ , isNothing iface || iface == Just (M.signalInterface msg)+ , isNothing member || member == Just (M.signalMember msg)+ ]++<<exports>>=+, onSignal+, signalFilter++@+\section{Remote object proxies}++<<exports>>=+, RemoteObject (..)+, Proxy (..)+, call+, callBlocking+, onSignalFrom++<<DBus/Client.hs>>=+data RemoteObject = RemoteObject T.BusName T.ObjectPath+data Proxy = Proxy RemoteObject T.InterfaceName++@ \subsection{Method calls}++<<DBus/Client.hs>>=+call :: Client -> Proxy -> T.MemberName -> [M.Flag] -> [T.Variant]+ -> (M.Error -> IO ())+ -> (M.MethodReturn -> IO ())+ -> IO ()+call client proxy name flags body onError onReturn = let+ Proxy (RemoteObject dest path) iface = proxy+ Client bus mvar _ _ = client+ msg = M.MethodCall path name (Just iface) (Just dest)+ (Set.fromList flags)+ body+ + callback (M.ReceivedError _ _ z) = onError z+ callback (M.ReceivedMethodReturn _ _ z) = onReturn z+ callback _ = undefined+ + addCallback s = MV.modifyMVar_ mvar $ \callbacks ->+ return $ Map.insert s callback callbacks+ in send' bus addCallback msg++<<DBus/Client.hs>>=+callBlocking :: Client -> Proxy -> T.MemberName -> [M.Flag] -> [T.Variant]+ -> IO M.MethodReturn+callBlocking client proxy name flags body = do+ mvar <- MV.newEmptyMVar+ call client proxy name flags body+ (MV.putMVar mvar . Left)+ (MV.putMVar mvar . Right)+ reply <- MV.takeMVar mvar+ case reply of+ Left x -> error (show x)+ Right x -> return x++@ \subsection{Signals}++<<DBus/Client.hs>>=+onSignalFrom :: Client -> Proxy -> T.MemberName -> (M.Signal -> IO ())+ -> IO ()+onSignalFrom client proxy member io = onSignal client test io' where+ Proxy (RemoteObject dest path) iface = proxy+ test = signalFilter (Just dest) (Just path) (Just iface)+ (Just member)+ io' _ msg = io msg++@+\section{Exporting local objects}++<<imports>>=+import qualified DBus.Introspection as I++<<initialize client>>=+export client (T.mkObjectPath' "/") rootObject++<<DBus/Client.hs>>=+rootObject :: LocalObject+rootObject = LocalObject $ Map.fromList [(ifaceName, interface)] where+ ifaceName = T.mkInterfaceName' "org.freedesktop.DBus.Introspectable"+ memberName = T.mkMemberName' "Introspect"+ inSig = T.mkSignature' ""+ outSig = T.mkSignature' "s"+ interface = Interface $ Map.fromList [(memberName, impl)]+ + method = I.Method memberName [] [I.Parameter "xml" outSig]+ iface = I.Interface ifaceName [method] [] []+ path = T.mkObjectPath' "/"+ + impl = Method inSig outSig $ \call' -> do+ let Client _ _ mvar _ = methodCallClient call'+ paths <- fmap Map.keys $ MV.readMVar mvar+ + let paths' = filter (/= path) paths+ let Just xml = I.toXML $ I.Object path [iface]+ [I.Object p [] [] | p <- paths']+ replyReturn call' [T.toVariant xml]++<<exports>>=+, LocalObject (..)+, Member (..)+, Interface (..)+, MethodCall (..)+, export++<<imports>>=+import qualified Data.Text.Lazy as TL++<<DBus/Client.hs>>=+newtype LocalObject = LocalObject (Map.Map T.InterfaceName Interface)+newtype Interface = Interface (Map.Map T.MemberName Member)+data Member+ = Method T.Signature T.Signature (MethodCall -> IO ())+ | Signal T.Signature++<<DBus/Client.hs>>=+export :: Client -> T.ObjectPath -> LocalObject -> IO ()+export client@(Client _ _ mvar _) path obj = MV.modifyMVar_ mvar $+ return . Map.insert path (onMethodCall client (addIntrospectable path obj))++<<DBus/Client.hs>>=+addIntrospectable :: T.ObjectPath -> LocalObject -> LocalObject+addIntrospectable path (LocalObject ifaces) = LocalObject ifaces' where+ ifaces' = Map.insertWith (\_ x -> x) name iface ifaces+ name = T.mkInterfaceName' "org.freedesktop.DBus.Introspectable"+ iface = Interface $ Map.fromList [(T.mkMemberName' "Introspect", impl)]+ impl = Method (T.mkSignature' "") (T.mkSignature' "s") $ \call' -> do+ let Just xml = I.toXML . introspect path . methodCallObject $ call'+ replyReturn call' [T.toVariant xml]++<<DBus/Client.hs>>=+introspect :: T.ObjectPath -> LocalObject -> I.Object+introspect path obj = I.Object path interfaces [] where+ LocalObject ifaceMap = obj+ interfaces = map introspectIface (Map.toList ifaceMap)+ + introspectIface :: (T.InterfaceName, Interface) -> I.Interface+ introspectIface (name, iface) = I.Interface name methods signals [] where+ Interface memberMap = iface+ members = Map.toList memberMap+ methods = concatMap introspectMethod members+ signals = concatMap introspectSignal members+ + introspectMethod :: (T.MemberName, Member) -> [I.Method]+ introspectMethod (name, (Method inSig outSig _)) = [I.Method name+ (map introspectParam (T.signatureTypes inSig))+ (map introspectParam (T.signatureTypes outSig))]+ introspectMethod _ = []+ + introspectSignal :: (T.MemberName, Member) -> [I.Signal]+ introspectSignal (name, (Signal sig)) = [I.Signal name+ (map introspectParam (T.signatureTypes sig))]+ introspectSignal _ = []+ + introspectParam = I.Parameter "" . T.mkSignature' . T.typeCode++@ \subsection{Responding to method calls}++<<DBus/Client.hs>>=+data MethodCall = MethodCall+ { methodCallObject :: LocalObject+ , methodCallClient :: Client+ , methodCallMethod :: Member+ , methodCallSerial :: M.Serial+ , methodCallSender :: Maybe T.BusName+ , methodCallFlags :: Set.Set M.Flag+ , methodCallBody :: [T.Variant]+ }++@ Technically method calls don't have to specify an interface if there's only+one available in the destination object, but that'll never be the case here,+so treat an unspecified interface as unknown.++<<DBus/Client.hs>>=+findMember :: M.MethodCall -> LocalObject -> Maybe Member+findMember call' (LocalObject ifaces) = do+ iface <- M.methodCallInterface call'+ Interface members <- Map.lookup iface ifaces+ Map.lookup (M.methodCallMember call') members++<<DBus/Client.hs>>=+onMethodCall :: Client -> LocalObject -> M.ReceivedMessage -> IO ()+onMethodCall client obj msg = do+ let M.ReceivedMethodCall serial sender call' = msg+ sigStr = TL.concat . map (T.typeCode . T.variantType)+ . M.methodCallBody $ call'+ sig = T.mkSignature' sigStr+ + case findMember call' obj of+ Just method@(Method inSig _ x) -> let+ call'' = MethodCall obj client method+ serial sender+ (M.methodCallFlags call')+ (M.methodCallBody call')+ invalidArgs = replyError call'' Const.errorInvalidArgs []+ in if inSig == sig+ then x call''+ else invalidArgs+ _ -> unknownMethod client msg+ ++<<DBus/Client.hs>>=+replyReturn :: MethodCall -> [T.Variant] -> IO ()+replyReturn call' body = reply where+ c = clientConnection . methodCallClient $ call'+ replyInvalid = M.Error+ Const.errorFailed+ (methodCallSerial call')+ (methodCallSender call')+ (Set.fromList [M.NoReplyExpected, M.NoAutoStart])+ [T.toVariant $ TL.pack "Method return didn't match signature."]+ + replyValid = M.MethodReturn+ (methodCallSerial call')+ (methodCallSender call')+ (Set.fromList [M.NoReplyExpected, M.NoAutoStart])+ body+ + sendReply :: M.Message a => a -> IO ()+ sendReply = send' c (const $ return ())+ + sigStr = TL.concat . map (T.typeCode . T.variantType) $ body+ (Method _ outSig _) = methodCallMethod call'+ reply = if T.mkSignature sigStr == Just outSig+ then sendReply replyValid+ else sendReply replyInvalid++<<DBus/Client.hs>>=+replyError :: MethodCall -> T.ErrorName -> [T.Variant] -> IO ()+replyError call' name body = send' c (const $ return ()) reply where+ c = clientConnection . methodCallClient $ call'+ reply = M.Error+ name+ (methodCallSerial call')+ (methodCallSender call')+ (Set.fromList [M.NoReplyExpected, M.NoAutoStart])+ body++<<exports>>=+, replyReturn+, replyError++@ \end{document}
+ hs/DBus/Client.hs view
@@ -0,0 +1,415 @@+{-+ Copyright (C) 2009 John Millikin <jmillikin@gmail.com>+ + This program is free software: you can redistribute it and/or modify+ it under the terms of the GNU General Public License as published by+ the Free Software Foundation, either version 3 of the License, or+ any later version.+ + This program is distributed in the hope that it will be useful,+ but WITHOUT ANY WARRANTY; without even the implied warranty of+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the+ GNU General Public License for more details.+ + You should have received a copy of the GNU General Public License+ along with this program. If not, see <http://www.gnu.org/licenses/>.+-}+++{-# LANGUAGE OverloadedStrings #-}+module DBus.Client+ ( Client+ , clientConnection++ , mkClient++ , RequestNameFlag (..)+ , RequestNameReply (..)+ , ReleaseNameReply (..)++ , requestName++ , releaseName++ , onSignal+ , signalFilter++ , RemoteObject (..)+ , Proxy (..)+ , call+ , callBlocking+ , onSignalFrom++ , LocalObject (..)+ , Member (..)+ , Interface (..)+ , MethodCall (..)+ , export++ , replyReturn+ , replyError++ ) where+import qualified Control.Concurrent.MVar as MV+import qualified Data.Map as Map+import qualified DBus.Connection as C+import qualified DBus.Constants as Const+import qualified DBus.Message as M+import qualified DBus.Types as T++import Data.Word (Word32)+import Data.Bits ((.|.))++import Control.Concurrent (forkIO)+import Control.Monad (forever)+import qualified Data.Set as Set++import Data.Maybe (isJust, fromJust, isNothing)++import qualified DBus.Introspection as I++import qualified Data.Text.Lazy as TL+++type Callback = (M.ReceivedMessage -> IO ())++data Client = Client C.Connection+ (MV.MVar (Map.Map M.Serial Callback))+ (MV.MVar (Map.Map T.ObjectPath Callback))+ (MV.MVar [Callback])++clientConnection :: Client -> C.Connection+clientConnection (Client x _ _ _) = x++mkClient :: IO (C.Connection, T.BusName) -> IO Client+mkClient getBus = do+ (c, _) <- getBus+ replies <- MV.newMVar Map.empty+ exports <- MV.newMVar Map.empty+ signals <- MV.newMVar []+ let client = Client c replies exports signals+ forkIO $ forever (receiveMessages client)++ export client (T.mkObjectPath' "/") rootObject++ return client++send' :: M.Message a => C.Connection -> (M.Serial -> IO b) -> a+ -> IO b+send' c f msg = C.send c f msg >>= \result -> case result of+ Left x -> error $ show x+ Right x -> return x++data RequestNameFlag+ = AllowReplacement+ | ReplaceExisting+ | DoNotQueue+ deriving (Show)++data RequestNameReply+ = PrimaryOwner+ | InQueue+ | Exists+ | AlreadyOwner+ deriving (Show)++data ReleaseNameReply+ = Released+ | NonExistent+ | NotOwner+ deriving (Show)++dbus :: Proxy+dbus = Proxy (RemoteObject Const.dbusName Const.dbusPath) Const.dbusInterface++request, release :: T.MemberName+request = T.mkMemberName' "RequestName"+release = T.mkMemberName' "ReleaseName"++requestName :: Client -> T.BusName -> [RequestNameFlag] -> IO RequestNameReply+requestName client name flags = do+ returned <- callBlocking client dbus request []+ [ T.toVariant name+ , T.toVariant . encodeFlags $ flags]+ + let reply = M.messageBody returned !! 0+ case decodeRequestReply =<< T.fromVariant reply of+ Just x -> return x+ Nothing -> error $ "Unknown request name reply: " +++ show reply++releaseName :: Client -> T.BusName -> IO ReleaseNameReply+releaseName client name = do+ returned <- callBlocking client dbus release [] [T.toVariant name]+ + let reply = M.messageBody returned !! 0+ case decodeReleaseReply =<< T.fromVariant reply of+ Just x -> return x+ Nothing -> error $ "Unknown release name reply: " +++ show reply++encodeFlags :: [RequestNameFlag] -> Word32+encodeFlags = foldr (.|.) 0 . map flagValue where+ flagValue AllowReplacement = 0x1+ flagValue ReplaceExisting = 0x2+ flagValue DoNotQueue = 0x4++decodeRequestReply :: Word32 -> Maybe RequestNameReply+decodeRequestReply 1 = Just PrimaryOwner+decodeRequestReply 2 = Just InQueue+decodeRequestReply 3 = Just Exists+decodeRequestReply 4 = Just AlreadyOwner+decodeRequestReply _ = Nothing++decodeReleaseReply :: Word32 -> Maybe ReleaseNameReply+decodeReleaseReply 1 = Just Released+decodeReleaseReply 2 = Just NonExistent+decodeReleaseReply 3 = Just NotOwner+decodeReleaseReply _ = Nothing++receiveMessages :: Client -> IO ()+receiveMessages client@(Client c _ _ _) = do+ received <- C.receive c+ msg <- case received of+ Left x -> error $ show x+ Right x -> return x+ case msg of+ (M.ReceivedMethodCall _ _ _ ) -> gotMethodCall client msg+ (M.ReceivedMethodReturn _ _ msg') -> gotReply client (M.methodReturnSerial msg') msg+ (M.ReceivedError _ _ msg') -> gotReply client (M.errorSerial msg') msg+ (M.ReceivedSignal _ _ _ ) -> gotSignal client msg+ _ -> return ()++gotMethodCall :: Client -> M.ReceivedMessage -> IO ()+gotMethodCall client@(Client _ _ mvar _) msg = do+ objects <- MV.readMVar mvar+ let M.ReceivedMethodCall _ _ call' = msg+ case Map.lookup (M.methodCallPath call') objects of+ Just x -> x msg+ Nothing -> unknownMethod client msg++unknownMethod :: Client -> M.ReceivedMessage -> IO ()+unknownMethod client msg = send' c (const $ return ()) errorMsg where+ M.ReceivedMethodCall serial sender _ = msg+ c = clientConnection client+ errorMsg = M.Error+ Const.errorUnknownMethod+ serial sender+ (Set.fromList [M.NoReplyExpected, M.NoAutoStart])+ []++gotReply :: Client -> M.Serial -> M.ReceivedMessage -> IO ()+gotReply (Client _ mvar _ _) serial msg = do+ callback <- MV.modifyMVar mvar $ \callbacks -> let+ x = Map.lookup serial callbacks+ callbacks' = if isJust x+ then Map.delete serial callbacks+ else callbacks+ in return (callbacks', x)+ case callback of+ Just x -> forkIO (x msg) >> return ()+ Nothing -> return ()++gotSignal :: Client -> M.ReceivedMessage -> IO ()+gotSignal (Client _ _ _ mvar) msg = MV.withMVar mvar $+ mapM_ (\cb -> forkIO (cb msg))++onSignal :: Client+ -> (T.BusName -> M.Signal -> Bool)+ -> (T.BusName -> M.Signal -> IO ())+ -> IO ()+onSignal (Client _ _ _ mvar) test callback = MV.modifyMVar_ mvar addCallback where+ addCallback callbacks = return $ callback' : callbacks+ callback' (M.ReceivedSignal _ sender msg) =+ if test (fromJust sender) msg+ then callback (fromJust sender) msg+ else return ()+ callback' _ = undefined++signalFilter :: Maybe T.BusName -> Maybe T.ObjectPath -> Maybe T.InterfaceName+ -> Maybe T.MemberName -> T.BusName -> M.Signal -> Bool+signalFilter sender path iface member sender' msg = all id+ [ isNothing sender || sender == Just sender'+ , isNothing path || path == Just (M.signalPath msg)+ , isNothing iface || iface == Just (M.signalInterface msg)+ , isNothing member || member == Just (M.signalMember msg)+ ]++data RemoteObject = RemoteObject T.BusName T.ObjectPath+data Proxy = Proxy RemoteObject T.InterfaceName++call :: Client -> Proxy -> T.MemberName -> [M.Flag] -> [T.Variant]+ -> (M.Error -> IO ())+ -> (M.MethodReturn -> IO ())+ -> IO ()+call client proxy name flags body onError onReturn = let+ Proxy (RemoteObject dest path) iface = proxy+ Client bus mvar _ _ = client+ msg = M.MethodCall path name (Just iface) (Just dest)+ (Set.fromList flags)+ body+ + callback (M.ReceivedError _ _ z) = onError z+ callback (M.ReceivedMethodReturn _ _ z) = onReturn z+ callback _ = undefined+ + addCallback s = MV.modifyMVar_ mvar $ \callbacks ->+ return $ Map.insert s callback callbacks+ in send' bus addCallback msg++callBlocking :: Client -> Proxy -> T.MemberName -> [M.Flag] -> [T.Variant]+ -> IO M.MethodReturn+callBlocking client proxy name flags body = do+ mvar <- MV.newEmptyMVar+ call client proxy name flags body+ (MV.putMVar mvar . Left)+ (MV.putMVar mvar . Right)+ reply <- MV.takeMVar mvar+ case reply of+ Left x -> error (show x)+ Right x -> return x++onSignalFrom :: Client -> Proxy -> T.MemberName -> (M.Signal -> IO ())+ -> IO ()+onSignalFrom client proxy member io = onSignal client test io' where+ Proxy (RemoteObject dest path) iface = proxy+ test = signalFilter (Just dest) (Just path) (Just iface)+ (Just member)+ io' _ msg = io msg++rootObject :: LocalObject+rootObject = LocalObject $ Map.fromList [(ifaceName, interface)] where+ ifaceName = T.mkInterfaceName' "org.freedesktop.DBus.Introspectable"+ memberName = T.mkMemberName' "Introspect"+ inSig = T.mkSignature' ""+ outSig = T.mkSignature' "s"+ interface = Interface $ Map.fromList [(memberName, impl)]+ + method = I.Method memberName [] [I.Parameter "xml" outSig]+ iface = I.Interface ifaceName [method] [] []+ path = T.mkObjectPath' "/"+ + impl = Method inSig outSig $ \call' -> do+ let Client _ _ mvar _ = methodCallClient call'+ paths <- fmap Map.keys $ MV.readMVar mvar+ + let paths' = filter (/= path) paths+ let Just xml = I.toXML $ I.Object path [iface]+ [I.Object p [] [] | p <- paths']+ replyReturn call' [T.toVariant xml]++newtype LocalObject = LocalObject (Map.Map T.InterfaceName Interface)+newtype Interface = Interface (Map.Map T.MemberName Member)+data Member+ = Method T.Signature T.Signature (MethodCall -> IO ())+ | Signal T.Signature++export :: Client -> T.ObjectPath -> LocalObject -> IO ()+export client@(Client _ _ mvar _) path obj = MV.modifyMVar_ mvar $+ return . Map.insert path (onMethodCall client (addIntrospectable path obj))++addIntrospectable :: T.ObjectPath -> LocalObject -> LocalObject+addIntrospectable path (LocalObject ifaces) = LocalObject ifaces' where+ ifaces' = Map.insertWith (\_ x -> x) name iface ifaces+ name = T.mkInterfaceName' "org.freedesktop.DBus.Introspectable"+ iface = Interface $ Map.fromList [(T.mkMemberName' "Introspect", impl)]+ impl = Method (T.mkSignature' "") (T.mkSignature' "s") $ \call' -> do+ let Just xml = I.toXML . introspect path . methodCallObject $ call'+ replyReturn call' [T.toVariant xml]++introspect :: T.ObjectPath -> LocalObject -> I.Object+introspect path obj = I.Object path interfaces [] where+ LocalObject ifaceMap = obj+ interfaces = map introspectIface (Map.toList ifaceMap)+ + introspectIface :: (T.InterfaceName, Interface) -> I.Interface+ introspectIface (name, iface) = I.Interface name methods signals [] where+ Interface memberMap = iface+ members = Map.toList memberMap+ methods = concatMap introspectMethod members+ signals = concatMap introspectSignal members+ + introspectMethod :: (T.MemberName, Member) -> [I.Method]+ introspectMethod (name, (Method inSig outSig _)) = [I.Method name+ (map introspectParam (T.signatureTypes inSig))+ (map introspectParam (T.signatureTypes outSig))]+ introspectMethod _ = []+ + introspectSignal :: (T.MemberName, Member) -> [I.Signal]+ introspectSignal (name, (Signal sig)) = [I.Signal name+ (map introspectParam (T.signatureTypes sig))]+ introspectSignal _ = []+ + introspectParam = I.Parameter "" . T.mkSignature' . T.typeCode++data MethodCall = MethodCall+ { methodCallObject :: LocalObject+ , methodCallClient :: Client+ , methodCallMethod :: Member+ , methodCallSerial :: M.Serial+ , methodCallSender :: Maybe T.BusName+ , methodCallFlags :: Set.Set M.Flag+ , methodCallBody :: [T.Variant]+ }++findMember :: M.MethodCall -> LocalObject -> Maybe Member+findMember call' (LocalObject ifaces) = do+ iface <- M.methodCallInterface call'+ Interface members <- Map.lookup iface ifaces+ Map.lookup (M.methodCallMember call') members++onMethodCall :: Client -> LocalObject -> M.ReceivedMessage -> IO ()+onMethodCall client obj msg = do+ let M.ReceivedMethodCall serial sender call' = msg+ sigStr = TL.concat . map (T.typeCode . T.variantType)+ . M.methodCallBody $ call'+ sig = T.mkSignature' sigStr+ + case findMember call' obj of+ Just method@(Method inSig _ x) -> let+ call'' = MethodCall obj client method+ serial sender+ (M.methodCallFlags call')+ (M.methodCallBody call')+ invalidArgs = replyError call'' Const.errorInvalidArgs []+ in if inSig == sig+ then x call''+ else invalidArgs+ _ -> unknownMethod client msg+ ++replyReturn :: MethodCall -> [T.Variant] -> IO ()+replyReturn call' body = reply where+ c = clientConnection . methodCallClient $ call'+ replyInvalid = M.Error+ Const.errorFailed+ (methodCallSerial call')+ (methodCallSender call')+ (Set.fromList [M.NoReplyExpected, M.NoAutoStart])+ [T.toVariant $ TL.pack "Method return didn't match signature."]+ + replyValid = M.MethodReturn+ (methodCallSerial call')+ (methodCallSender call')+ (Set.fromList [M.NoReplyExpected, M.NoAutoStart])+ body+ + sendReply :: M.Message a => a -> IO ()+ sendReply = send' c (const $ return ())+ + sigStr = TL.concat . map (T.typeCode . T.variantType) $ body+ (Method _ outSig _) = methodCallMethod call'+ reply = if T.mkSignature sigStr == Just outSig+ then sendReply replyValid+ else sendReply replyInvalid++replyError :: MethodCall -> T.ErrorName -> [T.Variant] -> IO ()+replyError call' name body = send' c (const $ return ()) reply where+ c = clientConnection . methodCallClient $ call'+ reply = M.Error+ name+ (methodCallSerial call')+ (methodCallSender call')+ (Set.fromList [M.NoReplyExpected, M.NoAutoStart])+ body+