BeagleClient/DBusisms.cs

   1 //
   2 // SearchWindow.cs
   3 //
   4 // Copyright (C) 2004 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a copy
   9 // of this software and associated documentation files (the "Software"), to deal
  10 // in the Software without restriction, including without limitation the rights
  11 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12 // copies of the Software, and to permit persons to whom the Software is
  13 // furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in all
  16 // copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24 // SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.Runtime.InteropServices;
  29 using DBus;
  30
  31 namespace Beagle
  32 {
  33         public class DBusisms {
  34
  35                 static public readonly string Name = "com.novell.Beagle";
  36                 static public readonly string FactoryPath = "/com/novell/Beagle/Factory";
  37                 static public readonly string RemoteControlPath = "/com/novell/Beagle/RemoteControl";
  38                 static public readonly string WebHistoryIndexerPath = "/com/novell/Beagle/WebHistoryIndexer";
  39
  40                 public delegate void Callback ();
  41                 static public event Callback BeagleUpAgain;
  42                 static public event Callback BeagleDown;
  43
  44                 static Connection connection = null;
  45                 static Service service = null;
  46                 static BusDriver driver = null;
  47
  48                 [DllImport ("dbus-glib-1")]
  49                 private extern static void dbus_g_thread_init ();
  50
  51                 internal static Connection Connection {
  52                         get {
  53                                 if (connection == null) {
  54                                         dbus_g_thread_init ();
  55                                         connection = Bus.GetSessionBus ();
  56                                 }
  57                                 return connection;
  58                         }
  59                 }
  60
  61                 internal static Service Service {
  62                         get {
  63                                 if (service == null) {
  64 #if HAVE_OLD_DBUS
  65                                         Driver.ServiceOwnerChanged += OnNameOwnerChanged;
  66 #else
  67                                         Driver.NameOwnerChanged += OnNameOwnerChanged;
  68 #endif
  69                                         service = DBus.Service.Get (Connection, Name);
  70                                 }
  71                                 return service;
  72                         }
  73                 }
  74
  75                 internal static BusDriver Driver {
  76                         get {
  77                                 if (driver == null) {
  78                                         driver = BusDriver.New (Connection);
  79                                 }
  80                                 return driver;
  81                         }
  82                 }
  83
  84                 internal static void OnNameOwnerChanged (string name,
  85                                                          string oldOwner,
  86                                                          string newOwner)
  87                 {
  88                         if (name == Name) {
  89
  90                                 if (oldOwner == "") { // New service added
  91                                         //System.Console.WriteLine ("BeagleDaemon up");
  92
  93                                         if (BeagleUpAgain != null)
  94                                                 BeagleUpAgain ();
  95
  96                                 } else if (newOwner == "") { // Existing service deleted
  97                                         //System.Console.WriteLine ("BeagleDaemon down");
  98
  99                                         service = null;
 100
 101                                         if (BeagleDown != null)
 102                                                 BeagleDown ();
 103                                 }
 104                         }
 105                 }
 106         }
 107 }