Check if the server is active.

eekboard/eekboard-context.c

@@ -37,6 +37,7 @@ enum {
     DISABLED,
     KEY_PRESSED,
     KEY_RELEASED,
+    DESTROYED,
     LAST_SIGNAL
 };
 
@@ -146,6 +147,12 @@ eekboard_context_real_key_released (EekboardContext *self,
     }
 }
 
+static void
+eekboard_context_real_destroyed (EekboardContext *self)
+{
+    // g_debug ("eekboard_context_real_destroyed");
+}
+
 static void
 eekboard_context_get_property (GObject    *object,
                                guint       prop_id,
@@ -195,6 +202,7 @@ eekboard_context_class_init (EekboardContextClass *klass)
     klass->disabled = eekboard_context_real_disabled;
     klass->key_pressed = eekboard_context_real_key_pressed;
     klass->key_released = eekboard_context_real_key_released;
+    klass->destroyed = eekboard_context_real_destroyed;
 
     proxy_class->g_signal = eekboard_context_real_g_signal;
 
@@ -288,6 +296,24 @@ eekboard_context_class_init (EekboardContextClass *klass)
                       G_TYPE_NONE,
                       1,
                       G_TYPE_UINT);
+
+    /**
+     * EekboardContext::destroyed:
+     * @context: an #EekboardContext
+     *
+     * The ::destroyed signal is emitted each time the name of remote
+     * end is vanished.
+     */
+    signals[DESTROYED] =
+        g_signal_new (I_("destroyed"),
+                      G_TYPE_FROM_CLASS(gobject_class),
+                      G_SIGNAL_RUN_LAST,
+                      G_STRUCT_OFFSET(EekboardContextClass, destroyed),
+                      NULL,
+                      NULL,
+                      g_cclosure_marshal_VOID__VOID,
+                      G_TYPE_NONE,
+                      0);
 }
 
 static void
@@ -306,6 +332,15 @@ eekboard_context_init (EekboardContext *self)
                                (GDestroyNotify)g_object_unref);
 }
 
+static void
+context_name_vanished_callback (GDBusConnection *connection,
+                                const gchar     *name,
+                                gpointer         user_data)
+{
+    EekboardContext *context = user_data;
+    g_signal_emit_by_name (context, "destroyed", NULL);
+}
+
 /**
  * eekboard_context_new:
  * @connection: a #GDBusConnection
@@ -337,8 +372,24 @@ eekboard_context_new (GDBusConnection *connection,
                         "g-interface-name", "com.redhat.Eekboard.Context",
                         "g-object-path", object_path,
                         NULL);
-    if (initable != NULL)
+    if (initable != NULL) {
-        return EEKBOARD_CONTEXT (initable);
+        EekboardContext *context = EEKBOARD_CONTEXT (initable);
+        gchar *name_owner = g_dbus_proxy_get_name_owner (G_DBUS_PROXY(context));
+
+        if (name_owner == NULL) {
+            g_object_unref (context);
+            return NULL;
+        }
+
+        g_bus_watch_name_on_connection (connection,
+                                        name_owner,
+                                        G_BUS_NAME_WATCHER_FLAGS_NONE,
+                                        NULL,
+                                        context_name_vanished_callback,
+                                        context,
+                                        NULL);
+        return context;
+    }
     return NULL;
 }
 

eekboard/eekboard-context.h

@@ -66,10 +66,11 @@ struct _EekboardContextClass {
                           guint            keycode);
     void (*key_released) (EekboardContext *self,
                           guint            keycode);
+    void (*destroyed)    (EekboardContext *self);
 
     /*< private >*/
     /* padding */
-    gpointer pdummy[24];
+    gpointer pdummy[23];
 };
 
 GType            eekboard_context_get_type      (void) G_GNUC_CONST;

eekboard/eekboard-eekboard.c

@@ -29,6 +29,13 @@
 
 #include "eekboard/eekboard-eekboard.h"
 
+enum {
+    DESTROYED,
+    LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0, };
+
 G_DEFINE_TYPE (EekboardEekboard, eekboard_eekboard, G_TYPE_DBUS_PROXY);
 
 #define EEKBOARD_EEKBOARD_GET_PRIVATE(obj)                               \
@@ -39,6 +46,15 @@ struct _EekboardEekboardPrivate
     GHashTable *context_hash;
 };
 
+static void
+eekboard_eekboard_real_destroyed (EekboardEekboard *self)
+{
+    EekboardEekboardPrivate *priv = EEKBOARD_EEKBOARD_GET_PRIVATE(self);
+
+    // g_debug ("eekboard_eekboard_real_destroyed");
+    g_hash_table_remove_all (priv->context_hash);
+}
+
 static void
 eekboard_eekboard_dispose (GObject *object)
 {
@@ -60,7 +76,27 @@ eekboard_eekboard_class_init (EekboardEekboardClass *klass)
     g_type_class_add_private (gobject_class,
                               sizeof (EekboardEekboardPrivate));
 
+    klass->destroyed = eekboard_eekboard_real_destroyed;
+
     gobject_class->dispose = eekboard_eekboard_dispose;
+
+    /**
+     * EekboardEekboard::destroyed:
+     * @eekboard: an #EekboardEekboard
+     *
+     * The ::destroyed signal is emitted each time the name of remote
+     * end is vanished.
+     */
+    signals[DESTROYED] =
+        g_signal_new (I_("destroyed"),
+                      G_TYPE_FROM_CLASS(gobject_class),
+                      G_SIGNAL_RUN_LAST,
+                      G_STRUCT_OFFSET(EekboardEekboardClass, destroyed),
+                      NULL,
+                      NULL,
+                      g_cclosure_marshal_VOID__VOID,
+                      G_TYPE_NONE,
+                      0);
 }
 
 static void
@@ -76,6 +112,15 @@ eekboard_eekboard_init (EekboardEekboard *self)
                                (GDestroyNotify)g_object_unref);
 }
 
+static void
+eekboard_name_vanished_callback (GDBusConnection *connection,
+                                 const gchar     *name,
+                                 gpointer         user_data)
+{
+    EekboardEekboard *eekboard = user_data;
+    g_signal_emit_by_name (eekboard, "destroyed", NULL);
+}
+
 /**
  * eekboard_eekboard_new:
  * @connection: a #GDBusConnection
@@ -102,9 +147,36 @@ eekboard_eekboard_new (GDBusConnection *connection,
                         "g-interface-name", "com.redhat.Eekboard.Server",
                         "g-object-path", "/com/redhat/Eekboard/Server",
                         NULL);
-    if (initable != NULL)
+    if (initable != NULL) {
-        return EEKBOARD_EEKBOARD (initable);
+        EekboardEekboard *eekboard = EEKBOARD_EEKBOARD (initable);
+        gchar *name_owner = g_dbus_proxy_get_name_owner (G_DBUS_PROXY(eekboard));
+        if (name_owner == NULL) {
+            g_object_unref (eekboard);
             return NULL;
+        }
+
+        g_bus_watch_name_on_connection (connection,
+                                        name_owner,
+                                        G_BUS_NAME_WATCHER_FLAGS_NONE,
+                                        NULL,
+                                        eekboard_name_vanished_callback,
+                                        eekboard,
+                                        NULL);
+
+        return eekboard;
+    }
+    return NULL;
+}
+
+static void
+on_context_destroyed (EekboardContext *context,
+                      gpointer         user_data)
+{
+    EekboardEekboard *eekboard = user_data;
+    EekboardEekboardPrivate *priv = EEKBOARD_EEKBOARD_GET_PRIVATE(eekboard);
+
+    g_hash_table_remove (priv->context_hash,
+                         g_dbus_proxy_get_object_path (G_DBUS_PROXY(context)));
 }
 
 /**
@@ -153,6 +225,8 @@ eekboard_eekboard_create_context (EekboardEekboard *eekboard,
     g_hash_table_insert (priv->context_hash,
                          g_strdup (object_path),
                          g_object_ref (context));
+    g_signal_connect (context, "destroyed",
+                      G_CALLBACK(on_context_destroyed), eekboard);
     return context;
 }
 

eekboard/eekboard-eekboard.h

@@ -45,9 +45,12 @@ struct _EekboardEekboardClass {
     /*< private >*/
     GDBusProxyClass parent_class;
 
+    /* signals */
+    void (* destroyed) (EekboardEekboard *self);
+
     /*< private >*/
     /* padding */
-    gpointer pdummy[24];
+    gpointer pdummy[23];
 };
 
 GType             eekboard_eekboard_get_type    (void) G_GNUC_CONST;

src/desktop-client-main.c

@@ -77,10 +77,29 @@ on_notify_keyboard_visible (GObject    *object,
         g_main_loop_quit (loop);
 }
 
+static void
+on_context_destroyed (EekboardContext *context,
+                      gpointer         user_data)
+{
+    GMainLoop *loop = user_data;
+
+    g_main_loop_quit (loop);
+}
+
+static void
+on_destroyed (EekboardEekboard *eekboard,
+              gpointer          user_data)
+{
+    GMainLoop *loop = user_data;
+
+    g_main_loop_quit (loop);
+}
+
 int
 main (int argc, char **argv)
 {
     EekboardDesktopClient *client;
+    EekboardEekboard *eekboard;
     EekboardContext *context;
     GBusType bus_type;
     GDBusConnection *connection;
@@ -136,6 +155,10 @@ main (int argc, char **argv)
     }
 
     client = eekboard_desktop_client_new (connection);
+    if (client == NULL) {
+        g_printerr ("Can't create a client\n");
+        exit (1);
+    }
 
     gconfc = gconf_client_get_default ();
 
@@ -196,9 +219,15 @@ main (int argc, char **argv)
         g_object_get (client, "context", &context, NULL);
         g_signal_connect (context, "notify::keyboard-visible",
                           G_CALLBACK(on_notify_keyboard_visible), loop);
+        g_signal_connect (context, "destroyed",
+                          G_CALLBACK(on_context_destroyed), loop);
         g_object_unref (context);
     }
 
+    g_object_get (client, "eekboard", &eekboard, NULL);
+    g_signal_connect (eekboard, "destroyed",
+                      G_CALLBACK(on_destroyed), loop);
+
     g_main_loop_run (loop);
     g_main_loop_unref (loop);
 

src/desktop-client.c

@@ -43,6 +43,7 @@
 enum {
     PROP_0,
     PROP_CONNECTION,
+    PROP_EEKBOARD,
     PROP_CONTEXT,
     PROP_LAST
 };
@@ -124,15 +125,19 @@ eekboard_desktop_client_set_property (GObject      *object,
         connection = g_value_get_object (value);
 
         client->eekboard = eekboard_eekboard_new (connection, NULL);
-        g_assert (client->eekboard);
+        if (client->eekboard != NULL) {
-
             client->context =
                 eekboard_eekboard_create_context (client->eekboard,
                                                   "eekboard-desktop-client",
                                                   NULL);
-        g_assert (client->context);
+            if (client->context == NULL) {
-
+                g_object_unref (client->eekboard);
-        eekboard_eekboard_push_context (client->eekboard, client->context, NULL);
+                client->eekboard = NULL;
+            } else
+                eekboard_eekboard_push_context (client->eekboard,
+                                                client->context,
+                                                NULL);
+        }
         break;
     default:
         g_object_set_property (object,
@@ -151,6 +156,9 @@ eekboard_desktop_client_get_property (GObject    *object,
     EekboardDesktopClient *client = EEKBOARD_DESKTOP_CLIENT(object);
 
     switch (prop_id) {
+    case PROP_EEKBOARD:
+        g_value_set_object (value, client->eekboard);
+        break;
     case PROP_CONTEXT:
         g_value_set_object (value, client->context);
         break;
@@ -230,6 +238,15 @@ eekboard_desktop_client_class_init (EekboardDesktopClientClass *klass)
                                      PROP_CONNECTION,
                                      pspec);
 
+    pspec = g_param_spec_object ("eekboard",
+                                 "Eekboard",
+                                 "Eekboard",
+                                 EEKBOARD_TYPE_EEKBOARD,
+                                 G_PARAM_READABLE);
+    g_object_class_install_property (gobject_class,
+                                     PROP_EEKBOARD,
+                                     pspec);
+
     pspec = g_param_spec_object ("context",
                                  "Context",
                                  "Context",
@@ -460,9 +477,12 @@ keystroke_listener_cb (const AccessibleKeystroke *stroke,
 EekboardDesktopClient *
 eekboard_desktop_client_new (GDBusConnection *connection)
 {
-    return g_object_new (EEKBOARD_TYPE_DESKTOP_CLIENT,
+    EekboardDesktopClient *client = g_object_new (EEKBOARD_TYPE_DESKTOP_CLIENT,
                                                   "connection", connection,
                                                   NULL);
+    if (client->context)
+        return client;
+    return NULL;
 }
 
 static GdkFilterReturn