gecko/toolkit/system/dbus/nsDBusService.h

113 lines
4.1 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
*/
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Novell code.
*
* The Initial Developer of the Original Code is Novell, Inc.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Original Author: Robert O'Callahan (rocallahan@novell.com)
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef NSDBUSSERVICE_H_
#define NSDBUSSERVICE_H_
#define DBUS_API_SUBJECT_TO_CHANGE
#include <dbus/dbus.h>
#include "nsITimer.h"
#include "nsCOMPtr.h"
class DBusClient {
public:
virtual void RegisterWithConnection(DBusConnection* connection) = 0;
virtual void UnregisterWithConnection(DBusConnection* connection) = 0;
virtual PRBool HandleMessage(DBusMessage* msg) = 0;
};
#define NS_DBUS_IID \
{ 0xba4f79b7, 0x0d4c, 0x4b3a, { 0x8a, 0x85, 0x6f, 0xb3, 0x0d, 0xce, 0xf5, 0x11 } }
/**
* The nsDBusService component interfaces with DBUS to communicate with daemons
* in systems supporting DBUS. It links dynamically to the DBUS libraries so
* will not load on systems without those libraries ... but that's harmless.
*
* Currently the only daemon we communicate with is NetworkManager. We listen
* for NetworkManager state changes; we set nsIOService's offline status to
* FALSE when NetworkManager reports NM_STATE_CONNECTED, and to TRUE otherwise.
* We also solicit the current status from NetworkManager when this component
* gets loaded. In addition to setting IOService, we also set the
* "browser.offline" preference (because Firefox treats that preference as
* authoritative). We have to wait until prefs have been loaded before setting
* "browser.offline".
*
* In the future we could extend this class to talk to other daemons.
*
* Currently all communication is asynchronous. This isn't hard to implement
* and avoids blocking our main thread.
*/
class nsDBusService : public nsISupports
{
public:
nsDBusService();
virtual ~nsDBusService();
NS_DECL_ISUPPORTS
NS_DECLARE_STATIC_IID_ACCESSOR(NS_DBUS_IID)
static already_AddRefed<nsDBusService> Get();
nsresult AddClient(DBusClient* client);
void RemoveClient(DBusClient* client);
DBusPendingCall* SendWithReply(DBusClient* client, DBusMessage* message);
// these should be private but we need to call them from static functions
PRBool HandleMessage(DBusMessage* message);
void DoTimerCallback(nsITimer* aTimer);
private:
nsresult CreateConnection();
void DropConnection();
void HandleDBusDisconnect();
static nsDBusService* gSingleton;
DBusConnection* mConnection;
nsCOMPtr<nsITimer> mReconnectTimer;
DBusClient* mSingleClient;
};
#endif /*NSDBUSSERVICE_H_*/