1 #include <gio/gio.h>
2 #include <stdlib.h>
3
4 /* ---------------------------------------------------------------------------------------------------- */
5
6 /* The object we want to export */
7 typedef struct _MyObjectClass MyObjectClass;
8 typedef struct _MyObject MyObject;
9
10 struct _MyObjectClass
11 {
12 GObjectClass parent_class;
13 };
14
15 struct _MyObject
16 {
17 GObject parent_instance;
18
19 gint count;
20 gchar *name;
21 };
22
23 enum
24 {
25 PROP_0,
26 PROP_COUNT,
27 PROP_NAME
28 };
29
30 static GType my_object_get_type (void);
31 G_DEFINE_TYPE (MyObject, my_object, G_TYPE_OBJECT)
32
33 static void
34 my_object_finalize (GObject *object)
35 {
36 MyObject *myobj = (MyObject*)object;
37
38 g_free (myobj->name);
39
40 G_OBJECT_CLASS (my_object_parent_class)->finalize (object);
41 }
42
43 static void
44 my_object_init (MyObject *object)
45 {
46 object->count = 0;
47 object->name = NULL;
48 }
49
50 static void
51 my_object_get_property (GObject *object,
52 guint prop_id,
53 GValue *value,
54 GParamSpec *pspec)
55 {
56 MyObject *myobj = (MyObject*)object;
57
58 switch (prop_id)
59 {
60 case PROP_COUNT:
61 g_value_set_int (value, myobj->count);
62 break;
63
64 case PROP_NAME:
65 g_value_set_string (value, myobj->name);
66 break;
67
68 default:
69 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
70 }
71 }
72
73 static void
74 my_object_set_property (GObject *object,
75 guint prop_id,
76 const GValue *value,
77 GParamSpec *pspec)
78 {
79 MyObject *myobj = (MyObject*)object;
80
81 switch (prop_id)
82 {
83 case PROP_COUNT:
84 myobj->count = g_value_get_int (value);
85 break;
86
87 case PROP_NAME:
88 g_free (myobj->name);
89 myobj->name = g_value_dup_string (value);
90 break;
91
92 default:
93 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
94 }
95 }
96
97 static void
98 my_object_class_init (MyObjectClass *class)
99 {
100 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
101
102 gobject_class->finalize = my_object_finalize;
103 gobject_class->set_property = my_object_set_property;
104 gobject_class->get_property = my_object_get_property;
105
106 g_object_class_install_property (gobject_class,
107 PROP_COUNT,
108 g_param_spec_int ("count",
109 "Count",
110 "Count",
111 0, 99999, 0,
112 G_PARAM_READWRITE));
113
114 g_object_class_install_property (gobject_class,
115 PROP_NAME,
116 g_param_spec_string ("name",
117 "Name",
118 "Name",
119 NULL,
120 G_PARAM_READWRITE));
121 }
122
123 /* A method that we want to export */
124 static void
125 my_object_change_count (MyObject *myobj,
126 gint change)
127 {
128 myobj->count = 2 * myobj->count + change;
129
130 g_object_notify (G_OBJECT (myobj), "count");
131 }
132
133 /* ---------------------------------------------------------------------------------------------------- */
134
135 static GDBusNodeInfo *introspection_data = NULL;
136
137 /* Introspection data for the service we are exporting */
138 static const gchar introspection_xml[] =
139 "<node>"
140 " <interface name='org.myorg.MyObject'>"
141 " <method name='ChangeCount'>"
142 " <arg type='i' name='change' direction='in'/>"
143 " </method>"
144 " <property type='i' name='Count' access='read'/>"
145 " <property type='s' name='Name' access='readwrite'/>"
146 " </interface>"
147 "</node>";
148
149
150 static void
151 handle_method_call (GDBusConnection *connection,
152 const gchar *sender,
153 const gchar *object_path,
154 const gchar *interface_name,
155 const gchar *method_name,
156 GVariant *parameters,
157 GDBusMethodInvocation *invocation,
158 gpointer user_data)
159 {
160 MyObject *myobj = user_data;
161
162 if (g_strcmp0 (method_name, "ChangeCount") == 0)
163 {
164 gint change;
165 g_variant_get (parameters, "(i)", &change);
166
167 my_object_change_count (myobj, change);
168
169 g_dbus_method_invocation_return_value (invocation, NULL);
170 }
171 }
172
173 static GVariant *
174 handle_get_property (GDBusConnection *connection,
175 const gchar *sender,
176 const gchar *object_path,
177 const gchar *interface_name,
178 const gchar *property_name,
179 GError **error,
180 gpointer user_data)
181 {
182 GVariant *ret;
183 MyObject *myobj = user_data;
184
185 ret = NULL;
186 if (g_strcmp0 (property_name, "Count") == 0)
187 {
188 ret = g_variant_new_int32 (myobj->count);
189 }
190 else if (g_strcmp0 (property_name, "Name") == 0)
191 {
192 ret = g_variant_new_string (myobj->name ? myobj->name : "");
193 }
194
195 return ret;
196 }
197
198 static gboolean
199 handle_set_property (GDBusConnection *connection,
200 const gchar *sender,
201 const gchar *object_path,
202 const gchar *interface_name,
203 const gchar *property_name,
204 GVariant *value,
205 GError **error,
206 gpointer user_data)
207 {
208 MyObject *myobj = user_data;
209
210 if (g_strcmp0 (property_name, "Count") == 0)
211 {
212 g_object_set (myobj, "count", g_variant_get_int32 (value), NULL);
213 }
214 else if (g_strcmp0 (property_name, "Name") == 0)
215 {
216 g_object_set (myobj, "name", g_variant_get_string (value, NULL), NULL);
217 }
218
219 return TRUE;
220 }
221
222
223 /* for now */
224 static const GDBusInterfaceVTable interface_vtable =
225 {
226 handle_method_call,
227 handle_get_property,
228 handle_set_property,
229 { 0 }
230 };
231
232 static void
233 send_property_change (GObject *obj,
234 GParamSpec *pspec,
235 GDBusConnection *connection)
236 {
237 GVariantBuilder *builder;
238 GVariantBuilder *invalidated_builder;
239 MyObject *myobj = (MyObject *)obj;
240
241 builder = g_variant_builder_new (G_VARIANT_TYPE_ARRAY);
242 invalidated_builder = g_variant_builder_new (G_VARIANT_TYPE ("as"));
243
244 if (g_strcmp0 (pspec->name, "count") == 0)
245 g_variant_builder_add (builder,
246 "{sv}",
247 "Count", g_variant_new_int32 (myobj->count));
248 else if (g_strcmp0 (pspec->name, "name") == 0)
249 g_variant_builder_add (builder,
250 "{sv}",
251 "Name", g_variant_new_string (myobj->name ? myobj->name : ""));
252
253 g_dbus_connection_emit_signal (connection,
254 NULL,
255 "/org/myorg/MyObject",
256 "org.freedesktop.DBus.Properties",
257 "PropertiesChanged",
258 g_variant_new ("(sa{sv}as)",
259 "org.myorg.MyObject",
260 builder,
261 invalidated_builder),
262 NULL);
263 }
264
265 static void
266 on_bus_acquired (GDBusConnection *connection,
267 const gchar *name,
268 gpointer user_data)
269 {
270 MyObject *myobj = user_data;
271 guint registration_id;
272
273 g_signal_connect (myobj, "notify",
274 G_CALLBACK (send_property_change), connection);
275 registration_id = g_dbus_connection_register_object (connection,
276 "/org/myorg/MyObject",
277 introspection_data->interfaces[0],
278 &interface_vtable,
279 myobj,
280 NULL, /* user_data_free_func */
281 NULL); /* GError** */
282 g_assert (registration_id > 0);
283 }
284
285 static void
286 on_name_acquired (GDBusConnection *connection,
287 const gchar *name,
288 gpointer user_data)
289 {
290 }
291
292 static void
293 on_name_lost (GDBusConnection *connection,
294 const gchar *name,
295 gpointer user_data)
296 {
297 exit (1);
298 }
299
300 int
301 main (int argc, char *argv[])
302 {
303 guint owner_id;
304 GMainLoop *loop;
305 MyObject *myobj;
306
307 /* We are lazy here - we don't want to manually provide
308 * the introspection data structures - so we just build
309 * them from XML.
310 */
311 introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
312 g_assert (introspection_data != NULL);
313
314 myobj = g_object_new (my_object_get_type (), NULL);
315
316 owner_id = g_bus_own_name (G_BUS_TYPE_SESSION,
317 "org.myorg.MyObject",
318 G_BUS_NAME_OWNER_FLAGS_NONE,
319 on_bus_acquired,
320 on_name_acquired,
321 on_name_lost,
322 myobj,
323 NULL);
324
325 loop = g_main_loop_new (NULL, FALSE);
326 g_main_loop_run (loop);
327
328 g_bus_unown_name (owner_id);
329
330 g_dbus_node_info_unref (introspection_data);
331
332 g_object_unref (myobj);
333
334 return 0;
335 }