michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* vim:expandtab:shiftwidth=4:tabstop=4:
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef NSDBUSSERVICE_H_
michael@0: #define NSDBUSSERVICE_H_
michael@0: 
michael@0: #define DBUS_API_SUBJECT_TO_CHANGE
michael@0: #include <dbus/dbus.h>
michael@0: 
michael@0: #include "nsITimer.h"
michael@0: #include "nsCOMPtr.h"
michael@0: 
michael@0: class DBusClient {
michael@0: public:
michael@0:   virtual void RegisterWithConnection(DBusConnection* connection) = 0;
michael@0:   virtual void UnregisterWithConnection(DBusConnection* connection) = 0;
michael@0:   virtual bool HandleMessage(DBusMessage* msg) = 0;
michael@0: };
michael@0: 
michael@0: #define NS_DBUS_IID \
michael@0:   { 0xba4f79b7, 0x0d4c, 0x4b3a, { 0x8a, 0x85, 0x6f, 0xb3, 0x0d, 0xce, 0xf5, 0x11 } }
michael@0: 
michael@0: /**
michael@0:  * The nsDBusService component interfaces with DBUS to communicate with daemons
michael@0:  * in systems supporting DBUS. It links dynamically to the DBUS libraries so
michael@0:  * will not load on systems without those libraries ... but that's harmless.
michael@0:  *
michael@0:  * Currently the only daemon we communicate with is NetworkManager. We listen
michael@0:  * for NetworkManager state changes; we set nsIOService's offline status to
michael@0:  * FALSE when NetworkManager reports NM_STATE_CONNECTED, and to TRUE otherwise.
michael@0:  * We also solicit the current status from NetworkManager when this component
michael@0:  * gets loaded.
michael@0:  * 
michael@0:  * In the future we could extend this class to talk to other daemons.
michael@0:  * 
michael@0:  * Currently all communication is asynchronous. This isn't hard to implement
michael@0:  * and avoids blocking our main thread.
michael@0:  */
michael@0: class nsDBusService : public nsISupports
michael@0: {
michael@0: public:
michael@0:   nsDBusService();
michael@0:   virtual ~nsDBusService();
michael@0: 
michael@0:   NS_DECL_ISUPPORTS
michael@0:   NS_DECLARE_STATIC_IID_ACCESSOR(NS_DBUS_IID)
michael@0: 
michael@0:   static already_AddRefed<nsDBusService> Get();
michael@0:   
michael@0:   nsresult AddClient(DBusClient* client);
michael@0:   void RemoveClient(DBusClient* client);
michael@0: 
michael@0:   DBusPendingCall* SendWithReply(DBusClient* client, DBusMessage* message);
michael@0: 
michael@0:   // these should be private but we need to call them from static functions
michael@0:   bool HandleMessage(DBusMessage* message);
michael@0:   void DoTimerCallback(nsITimer* aTimer);
michael@0: 
michael@0: private:
michael@0:   nsresult CreateConnection();
michael@0:   void DropConnection();
michael@0:   void HandleDBusDisconnect();
michael@0: 
michael@0:   static nsDBusService* gSingleton;
michael@0:   
michael@0:   DBusConnection*    mConnection;
michael@0:   nsCOMPtr<nsITimer> mReconnectTimer;
michael@0:   DBusClient*        mSingleClient;
michael@0: };
michael@0: 
michael@0: NS_DEFINE_STATIC_IID_ACCESSOR(nsDBusService, NS_DBUS_IID)
michael@0: 
michael@0: #endif /*NSDBUSSERVICE_H_*/