summaryrefslogtreecommitdiffstats
path: root/mono/Handler.cs
blob: 91569e94b208ef5d7c778b19bf0696e67da87502 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
namespace DBus
{
  using System;
  using System.Runtime.InteropServices;
  using System.Diagnostics;
  using System.Reflection;
  using System.Collections;

  internal enum Result 
  {
    Handled = 0,
    NotYetHandled = 1,
    NeedMemory = 2
  }

  internal class Handler : IDisposable
  {
    private string path = null;
    private Introspector introspector = null;
    private object handledObject = null;
    private DBusObjectPathVTable vTable;
    private Connection connection;
    private Service service;
    private bool disposed = false;
    
    internal delegate void DBusObjectPathUnregisterFunction(IntPtr rawConnection,
							    IntPtr userData);

    internal delegate int DBusObjectPathMessageFunction(IntPtr rawConnection,
							IntPtr rawMessage,
							IntPtr userData);

    [StructLayout (LayoutKind.Sequential)]
    private struct DBusObjectPathVTable 
    {
      public DBusObjectPathUnregisterFunction unregisterFunction;
      public DBusObjectPathMessageFunction messageFunction;
      public IntPtr padding1;
      public IntPtr padding2;
      public IntPtr padding3;
      public IntPtr padding4;
    
      public DBusObjectPathVTable(DBusObjectPathUnregisterFunction unregisterFunction,
				  DBusObjectPathMessageFunction messageFunction) 
      {
	this.unregisterFunction = unregisterFunction;
	this.messageFunction = messageFunction;
	this.padding1 = IntPtr.Zero;
	this.padding2 = IntPtr.Zero;
	this.padding3 = IntPtr.Zero;
	this.padding4 = IntPtr.Zero;
      }
    }

    public void Dispose() 
    {
      Dispose(true);
      GC.SuppressFinalize(this);
    }
    
    private void Dispose(bool disposing) 
    {
      if (!disposed) {	
	if (disposing) {
	  // Clean up managed resources
	}

	service = null;

	// Clean up unmanaged resources
	if (Connection != null && Connection.RawConnection != IntPtr.Zero && Path != null) {
	  dbus_connection_unregister_object_path(Connection.RawConnection,
						 Path);
	}	

	connection = null;
	introspector = null;
	handledObject = null;
      }
      
      disposed = true;    
    }

    ~Handler() 
    {
      Dispose(false);
    }

    public Handler(object handledObject, 
		   string path, 
		   Service service)
    {
      Service = service;
      Connection = service.Connection;
      HandledObject = handledObject;
      this.path = path;
      
      // Create the vTable and register the path
      vTable = new DBusObjectPathVTable(new DBusObjectPathUnregisterFunction(Unregister_Called), 
					new DBusObjectPathMessageFunction(Message_Called));
      
      if (!dbus_connection_register_object_path(Connection.RawConnection,
						Path,
						ref vTable,
						IntPtr.Zero))
	throw new OutOfMemoryException();

      RegisterSignalHandlers();
    }

    private void RegisterSignalHandlers()
    {
      ProxyBuilder proxyBuilder = new ProxyBuilder(Service, HandledObject.GetType(), Path);

      foreach (DictionaryEntry interfaceEntry in this.introspector.InterfaceProxies) {
	InterfaceProxy interfaceProxy = (InterfaceProxy) interfaceEntry.Value;
	foreach (DictionaryEntry signalEntry in interfaceProxy.Signals) {
	  EventInfo eventE = (EventInfo) signalEntry.Value;
	  Delegate del = Delegate.CreateDelegate(eventE.EventHandlerType, proxyBuilder.GetSignalProxy(), "Proxy_" + eventE.Name);
	  eventE.AddEventHandler(HandledObject, del);
	}
      }
    }

    public object HandledObject 
    {
      get {
	return this.handledObject;
      }
      
      set {
	this.handledObject = value;
	
	object[] attributes;
	
	// Register the methods
	this.introspector = Introspector.GetIntrospector(value.GetType());	  
      }
    }

    public void Unregister_Called(IntPtr rawConnection, 
				  IntPtr userData)
    {
      if (service != null) {
	service.UnregisterObject(HandledObject);
      }

      path = null;
    }

    private int Message_Called(IntPtr rawConnection, 
			       IntPtr rawMessage, 
			       IntPtr userData) 
    {
      Message message = Message.Wrap(rawMessage, Service);

      switch (message.Type) {
      case Message.MessageType.Signal:
	// We're not interested in signals here because we're the ones
	// that generate them!
	break;
      case Message.MessageType.MethodCall:
	return (int) HandleMethod((MethodCall) message);
      }

      return (int) Result.NotYetHandled;
    }
    
    private Result HandleMethod(MethodCall methodCall)
    {
      methodCall.Service = service;
      
      InterfaceProxy interfaceProxy = this.introspector.GetInterface(methodCall.InterfaceName);
      if (interfaceProxy == null || !interfaceProxy.HasMethod(methodCall.Key)) {
	// No such interface here.
	return Result.NotYetHandled;
      }
      
      MethodInfo method = interfaceProxy.GetMethod(methodCall.Key);

      // Now call the method. FIXME: Error handling
      object [] args = methodCall.Arguments.GetParameters(method);
      object retVal = method.Invoke(this.handledObject, args);

      // Create the reply and send it
      MethodReturn methodReturn = new MethodReturn(methodCall);
      methodReturn.Arguments.AppendResults(method, retVal, args);
      methodReturn.Send();

      return Result.Handled;
    }

    internal string Path 
    {
      get 
	{
	  return path;
	}
    }

    internal Connection Connection 
    {
      get
	{
	  return connection;
	}
      
      set 
	{
	  this.connection = value;
	}
    }

    public Service Service
    {
      get
	{
	  return service;
	}
      
      set 
	{
	  this.service = value;
	}
    }

    [DllImport ("dbus-1")]
    private extern static bool dbus_connection_register_object_path (IntPtr rawConnection, string path, ref DBusObjectPathVTable vTable, IntPtr userData);

    [DllImport ("dbus-1")]
    private extern static void dbus_connection_unregister_object_path (IntPtr rawConnection, string path);

  }
}