Map windows to realms by calling realmsd pid lookup method

js/ui/realms/realmManager.js

@@ -56,4 +56,3 @@ var RealmManager = class {
     }
 
 };
-

js/ui/realms/realmWindowMenu.js

@@ -17,10 +17,11 @@ function _windowAppId(window) {
 function windowMenuDebugString(window) {
     const id = _windowAppId(window);
     const realm_name = windowRealmName(window);
+    const realms = Shell.Realms.get_default();
 
     if (!realm_name) {
         return id;
-    } else if (window.is_on_foreign_workspace_context()) {
+    } else if (realms.is_foreign_window(window)) {
         return `${id} [${realm_name}]`;
     } else {
         return `${id} (${realm_name})`;

src/shell-app-system.c

@@ -123,7 +123,7 @@ realm_name_from_application_id (const char *id)
 }
 
 
-char *
+static char *
 current_realm_name (gboolean name_only)
 {
   gchar *link = NULL;
@@ -399,6 +399,10 @@ shell_app_system_lookup_app (ShellAppSystem   *self,
   ShellApp *app;
   GDesktopAppInfo *info;
 
+  if (id == NULL) {
+    return NULL;
+  }
+
   app = g_hash_table_lookup (priv->id_to_app, id);
   if (app)
     return app;

src/shell-realm-item.c

@@ -8,16 +8,14 @@ struct _ShellRealmItem {
     GObject parent;
     char *realm_name;
     char *description;
-    char *namespace;
+    guint64 namespace;
     MetaWorkspaceContext *context;
-    guint8 status;
+    ShellRealmItemStatus status;
     gboolean tagged;
-    gboolean disposed;
 };
 
 G_DEFINE_TYPE (ShellRealmItem, shell_realm_item, G_TYPE_OBJECT);
 
-
 enum {
     PROP_0,
     PROP_ITEM_REALM_NAME,
@@ -25,45 +23,45 @@ enum {
     PROP_ITEM_NAMESPACE
 };
 
-#define REALM_STATUS_RUNNING 1
-#define REALM_STATUS_CURRENT 2
-#define REALM_STATUS_SYSTEM  4
 
 static void
-shell_realm_item_init(ShellRealmItem *item)
+shell_realm_item_init (ShellRealmItem *item)
 {
 }
 
 ShellRealmItem *
-shell_realm_item_new (const char *realm_name, const char *description, const char *namespace, guint8 status)
+shell_realm_item_new (const char *realm_name, const char *description, guint64 namespace, guint8 status)
 {
   ShellRealmItem *item = g_object_new (SHELL_TYPE_REALM_ITEM, NULL);
   item->realm_name = g_strdup (realm_name);
   item->description = g_strdup (description);
-  item->namespace = g_strdup (namespace);
+  item->namespace = namespace;
   item->status = status;
   item->context = NULL;
   item->tagged = FALSE;
-  item->disposed = FALSE;
 
   return item;
 }
 
-void
+/**
-shell_realm_item_acquire_context (ShellRealmItem *item)
+ * shell_realm_item_get_context:
+ * @item: A #ShellRealmItem instance
+ *
+ * Returns the #MetaWorkspaceContext associated with this realm if any.
+ *
+ * Returns: (transfer none) (nullable): a #MetaWorkspaceContext instance or
+ *   %NULL if no context is associated with this realm.
+ */
+MetaWorkspaceContext *
+shell_realm_item_get_context (ShellRealmItem *item)
 {
-  if (item->context || item->disposed || shell_realm_item_is_system (item)) {
+  return item->context;
-    return;
+}
-  }
 
-  if (!item->namespace || !shell_realm_item_is_running (item)) {
+void
-    g_warning ("ShellRealmItem: Cannot acquire workspace context for realm '%s' because not running or no namespace", item->realm_name);
+shell_realm_item_set_context (ShellRealmItem *item, MetaWorkspaceContext *context)
-    return;
+{
-  }
+  item->context = context;
-
-  MetaDisplay *display = shell_global_get_display (shell_global_get());
-  MetaWorkspaceManager *workspace_manager = meta_display_get_workspace_manager (display);
-  item->context = meta_workspace_manager_context_for_namespace (workspace_manager, item->namespace);
 }
 
 /**
@@ -98,15 +96,12 @@ shell_realm_item_get_description (ShellRealmItem *item)
  * shell_realm_item_get_namespace:
  * @item: A #ShellRealmItem instance
  *
- * Returns: The namespace field for this realm or an empty string if no namespace is set
+ * Returns: The namespace field for this realm or 0 if no namespace is set
  */
-const char *
+guint64
 shell_realm_item_get_namespace (ShellRealmItem *item)
 {
-  if (item->namespace)
   return item->namespace;
-  else
-    return "";
 }
 
 /**
@@ -119,10 +114,6 @@ shell_realm_item_get_namespace (ShellRealmItem *item)
 guint
 shell_realm_item_get_context_id (ShellRealmItem *item)
 {
-  if (shell_realm_item_is_running (item) && !item->context) {
-    shell_realm_item_acquire_context (item);
-  }
-
   if (item->context) {
     return meta_workspace_context_id (item->context);
   } else {
@@ -140,10 +131,6 @@ shell_realm_item_get_context_id (ShellRealmItem *item)
 MetaWorkspace *
 shell_realm_item_get_active_workspace (ShellRealmItem *item)
 {
-  if (shell_realm_item_is_running (item) && !item->context) {
-    shell_realm_item_acquire_context (item);
-  }
-
   if (item->context) {
     return meta_workspace_context_get_active_workspace (item->context);
   } else {
@@ -151,23 +138,6 @@ shell_realm_item_get_active_workspace (ShellRealmItem *item)
   }
 }
 
-/**
- * shell_realm_item_activate_context:
- * @item: A #ShellRealmItem instance for a running realm
- *
- * If a #MetaWorkspaceContext is associated with this realm
- * set it as the active workspace context.
- */
-void
-shell_realm_item_activate_context (ShellRealmItem *item)
-{
-  shell_realm_item_acquire_context (item);
-
-  if (item->context) {
-    meta_workspace_context_activate (item->context);
-  }
-}
-
 /**
  * shell_realm_item_set_current:
  * @item: A #ShellRealmItem instance for a running realm
@@ -178,7 +148,7 @@ shell_realm_item_activate_context (ShellRealmItem *item)
  */
 void
 shell_realm_item_set_current (ShellRealmItem *item) {
-  ShellRealmTracker *tracker = shell_realm_tracker_get_default();
+  ShellRealmTracker *tracker = shell_realm_tracker_get_default ();
   if (item && item->realm_name) {
     shell_realm_tracker_call_set_current (tracker, item->realm_name);
   }
@@ -195,8 +165,6 @@ shell_realm_item_set_current (ShellRealmItem *item) {
 void
 shell_realm_item_move_window_to_context (ShellRealmItem *item, MetaWindow *window)
 {
-  shell_realm_item_acquire_context (item);
-
   if (item->context) {
     meta_workspace_context_move_window_to_context (item->context, window);
   } else {
@@ -204,20 +172,20 @@ shell_realm_item_move_window_to_context (ShellRealmItem *item, MetaWindow *windo
   }
 }
 
-static gboolean
+gboolean
-is_flag_set(guint8 status, guchar flag)
+shell_realm_is_flag_set(guint8 status, ShellRealmItemStatus flag)
 {
   return ((status & flag) != 0) ? TRUE : FALSE;
 }
 
 static gboolean
-has_status_flag (ShellRealmItem *item, guchar flag)
+has_status_flag (ShellRealmItem *item, ShellRealmItemStatus flag)
 {
-  return is_flag_set (item->status, flag);
+  return shell_realm_is_flag_set (item->status, flag);
 }
 
 static void
-set_status_flag (ShellRealmItem *item, guint8 flag, gboolean value)
+set_status_flag (ShellRealmItem *item, ShellRealmItemStatus flag, gboolean value)
 {
   if (value) {
     item->status |= flag;
@@ -235,7 +203,7 @@ set_status_flag (ShellRealmItem *item, guint8 flag, gboolean value)
 gboolean
 shell_realm_item_is_current (ShellRealmItem *item)
 {
-  return has_status_flag (item, REALM_STATUS_CURRENT);
+  return has_status_flag (item, SHELL_REALM_ITEM_STATUS_CURRENT);
 }
 
 /**
@@ -247,7 +215,7 @@ shell_realm_item_is_current (ShellRealmItem *item)
 gboolean
 shell_realm_item_is_running (ShellRealmItem *item)
 {
-  return has_status_flag (item, REALM_STATUS_RUNNING);
+  return has_status_flag (item, SHELL_REALM_ITEM_STATUS_RUNNING);
 }
 
 /**
@@ -259,27 +227,22 @@ shell_realm_item_is_running (ShellRealmItem *item)
 gboolean
 shell_realm_item_is_system (ShellRealmItem *item)
 {
-  return has_status_flag (item, REALM_STATUS_SYSTEM);
+  return has_status_flag (item, SHELL_REALM_ITEM_STATUS_SYSTEM);
 }
 
 
 void shell_realm_item_set_current_flag (ShellRealmItem *item, gboolean value)
 {
-  set_status_flag (item, REALM_STATUS_CURRENT, value);
+  set_status_flag (item, SHELL_REALM_ITEM_STATUS_CURRENT, value);
 }
 
 void shell_realm_item_set_running_flag (ShellRealmItem *item, gboolean value)
 {
-  set_status_flag (item, REALM_STATUS_RUNNING, value);
+  set_status_flag (item, SHELL_REALM_ITEM_STATUS_RUNNING, value);
-
-  if (!value && item->context) {
-    meta_workspace_context_remove (item->context);
-    item->context = NULL;
-  }
 }
 
 
-void shell_realm_item_update (ShellRealmItem *item, const char *realm_name, const char *namespace, guint8 status)
+void shell_realm_item_update (ShellRealmItem *item, const char *realm_name, guint64 namespace, guint8 status)
 {
   if (g_strcmp0 (item->realm_name, realm_name)) {
     g_message ("ShellRealmItem: Realm name changed from %s to %s", item->realm_name, realm_name);
@@ -287,23 +250,8 @@ void shell_realm_item_update (ShellRealmItem *item, const char *realm_name, cons
     item->realm_name = g_strdup (realm_name);
   }
 
-  if (g_strcmp0 (item->namespace, namespace)) {
+  item->namespace = namespace;
-    g_free(item->namespace);
-    item->namespace = g_strdup (namespace);
-  }
-
-  if (item->status != status) {
-    gboolean was_running = has_status_flag (item, REALM_STATUS_RUNNING);
-    gboolean is_running = is_flag_set (status, REALM_STATUS_RUNNING);
-    gboolean stopped = was_running && !is_running;
-
   item->status = status;
-
-    if (stopped) {
-      meta_workspace_context_remove (item->context);
-      item->context = NULL;
-    }
-  }
 }
 
 void
@@ -332,7 +280,7 @@ static void shell_realm_item_get_property (GObject *gobject,
       g_value_set_string (value, shell_realm_item_get_description (item));
       break;
     case PROP_ITEM_NAMESPACE:
-      g_value_set_string (value, shell_realm_item_get_namespace (item));
+      g_value_set_uint64 (value, shell_realm_item_get_namespace (item));
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
@@ -347,7 +295,6 @@ static void shell_realm_item_dispose (GObject *object)
     meta_workspace_context_remove (item->context);
     item->context = NULL;
   }
-  item->disposed = TRUE;
   G_OBJECT_CLASS(shell_realm_item_parent_class)->dispose (object);
 }
 
@@ -357,7 +304,6 @@ shell_realm_item_finalize (GObject *object)
   ShellRealmItem *item = SHELL_REALM_ITEM (object);
   g_free (item->realm_name);
   g_free (item->description);
-  g_free (item->namespace);
 
   G_OBJECT_CLASS(shell_realm_item_parent_class)->finalize (object);
 }
@@ -373,10 +319,10 @@ shell_realm_item_class_init (ShellRealmItemClass *klass)
 
   g_object_class_install_property (gobject_class,
                                    PROP_ITEM_NAMESPACE,
-                                   g_param_spec_string ("namespace",
+                                   g_param_spec_uint64 ("namespace",
                                                         "Context Namespace",
                                                         "PID namespace of context",
-                                                        NULL,
+                                                        0, UINT64_MAX, 0,
                                                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (gobject_class,
                                    PROP_ITEM_REALM_NAME,

src/shell-realm-item.h

@@ -7,26 +7,36 @@
 #define SHELL_TYPE_REALM_ITEM (shell_realm_item_get_type())
 G_DECLARE_FINAL_TYPE (ShellRealmItem, shell_realm_item, SHELL, REALM_ITEM, GObject)
 
-ShellRealmItem *shell_realm_item_new (const char *realm_name, const char *description, const char *namespace, guint8 status);
+typedef enum {
+  SHELL_REALM_ITEM_STATUS_RUNNING = 1 << 0,
+  SHELL_REALM_ITEM_STATUS_CURRENT = 1 << 1,
+  SHELL_REALM_ITEM_STATUS_SYSTEM = 1 << 2,
+} ShellRealmItemStatus;
+
+gboolean shell_realm_is_flag_set (guint8 status, ShellRealmItemStatus flag);
+
+ShellRealmItem *shell_realm_item_new (const char *realm_name, const char *description, guint64 namespace, guint8 status);
 
 const char *shell_realm_item_get_realm_name (ShellRealmItem *item);
 const char *shell_realm_item_get_description (ShellRealmItem *item);
-const char *shell_realm_item_get_namespace (ShellRealmItem *item);
+guint64 shell_realm_item_get_namespace (ShellRealmItem *item);
 guint shell_realm_item_get_context_id (ShellRealmItem *item);
+MetaWorkspaceContext *shell_realm_item_get_context (ShellRealmItem *item);
+void shell_realm_item_set_context (ShellRealmItem *item, MetaWorkspaceContext *context);
+
 MetaWorkspace *shell_realm_item_get_active_workspace (ShellRealmItem *item);
 
-void shell_realm_item_update (ShellRealmItem *item, const char *realm_name, const char *namespace, guint8 status);
+void shell_realm_item_update (ShellRealmItem *item, const char *realm_name, guint64 namespace, guint8 status);
 
 
 void shell_realm_item_set_current_flag (ShellRealmItem *item, gboolean value);
 void shell_realm_item_set_running_flag (ShellRealmItem *item, gboolean value);
 
-void shell_realm_item_activate_context (ShellRealmItem *item);
 void shell_realm_item_set_current (ShellRealmItem *item);
 void shell_realm_item_move_window_to_context (ShellRealmItem *item, MetaWindow *window);
-gboolean shell_realm_item_is_current(ShellRealmItem *item);
+gboolean shell_realm_item_is_current (ShellRealmItem *item);
-gboolean shell_realm_item_is_running(ShellRealmItem *item);
+gboolean shell_realm_item_is_running (ShellRealmItem *item);
-gboolean shell_realm_item_is_system(ShellRealmItem *item);
+gboolean shell_realm_item_is_system (ShellRealmItem *item);
 
 void shell_realm_item_set_tagged (ShellRealmItem *item, gboolean is_tagged);
 gboolean shell_realm_item_is_tagged (ShellRealmItem *item);

src/shell-realm-tracker.c

@@ -7,6 +7,12 @@
 #define REALMS_OBJECT_PATH "/com/subgraph/realms"
 #define REALMS_MANAGER_INTERFACE "com.subgraph.realms.Manager"
 
+enum {
+    REALM_PID_LOOKUP_UNKNOWN = 1,
+    REALM_PID_LOOKUP_REALM = 2,
+    REALM_PID_LOOKUP_CITADEL = 3,
+};
+
 struct _ShellRealmTracker {
     GObject parent;
     GDBusConnection *dbus;
@@ -43,12 +49,12 @@ on_realm_bus_signal(GDBusConnection *connection,
 
   const gchar *realm_name = NULL;
   const gchar *description = NULL;
-  const gchar *namespace = NULL;
+  guint64 namespace;
   guint8 status = 0;
 
   if (g_str_equal (signal_name, "RealmStarted")) {
 
-    g_variant_get (parameters, "(&s&sy)", &realm_name, &namespace, &status);
+    g_variant_get (parameters, "(&sty)", &realm_name, &namespace, &status);
     shell_realms_on_realm_started (realms, realm_name, namespace, status);
 
   } else if (g_str_equal (signal_name, "RealmStopped")) {
@@ -76,6 +82,50 @@ on_realm_bus_signal(GDBusConnection *connection,
   }
 }
 
+static guint
+bus_signal_subscribe (ShellRealmTracker *self, const gchar *signal_name)
+{
+  g_assert(self->dbus);
+
+  return g_dbus_connection_signal_subscribe (self->dbus,
+                                             REALMS_BUS_NAME,
+                                             REALMS_MANAGER_INTERFACE,
+                                             signal_name,
+                                             REALMS_OBJECT_PATH,
+                                             NULL,
+                                             G_DBUS_SIGNAL_FLAGS_NONE,
+                                             on_realm_bus_signal,
+                                             self,
+                                             NULL);
+}
+
+static void
+subscribe_bus_signals (ShellRealmTracker *self)
+{
+  if (self->dbus) {
+    int idx = 0;
+    self->bus_signal_ids[idx++] = bus_signal_subscribe (self, "RealmStarted");
+    self->bus_signal_ids[idx++] = bus_signal_subscribe (self, "RealmStopped");
+    self->bus_signal_ids[idx++] = bus_signal_subscribe (self, "RealmCurrent");
+    self->bus_signal_ids[idx++] = bus_signal_subscribe (self, "RealmNew");
+    self->bus_signal_ids[idx++] = bus_signal_subscribe (self, "RealmRemoved");
+    g_assert(idx == NUM_BUS_SIGNAL_IDS);
+  }
+}
+
+static void
+unsubscribe_signals (ShellRealmTracker *self)
+{
+  for (int i = 0; i < NUM_BUS_SIGNAL_IDS; i++) {
+    if (self->bus_signal_ids[i]) {
+      if (self->dbus) {
+        g_dbus_connection_signal_unsubscribe (self->dbus, self->bus_signal_ids[i]);
+      }
+      self->bus_signal_ids[i] = 0;
+    }
+  }
+}
+
 static void
 realm_state_process_elements (ShellRealmTracker *self, GVariant *response)
 {
@@ -83,25 +133,26 @@ realm_state_process_elements (ShellRealmTracker *self, GVariant *response)
   GVariantIter *iter = NULL;
   const gchar *name = NULL;
   const gchar *description = NULL;
-  const gchar *namespace = NULL;
+  guint64 namespace = 0;
   guchar status = 0;
 
-  ShellRealms *realms = shell_realms_get_default();
+  ShellRealms *realms = shell_realms_get_default ();
   shell_realms_untag_all (realms);
 
-  g_variant_get(response, "(a(ssssy))", &iter);
+  g_variant_get (response, "(a(sssty))", &iter);
 
   // (name, desc, realmfs, namespace, status)
-  while (g_variant_iter_next(iter, "(&s&ss&sy)", &name, &description, NULL, &namespace, &status)) {
+  while (g_variant_iter_next (iter, "(&s&ssty)", &name, &description, NULL, &namespace, &status)) {
-    shell_realms_update_realm (realms, name, description, namespace, status);
+    shell_realms_process_list_realm (realms, name, description, namespace, status);
   }
 
   shell_realms_remove_untagged (realms);
-  g_variant_iter_free(iter);
+  shell_realms_update_contexts (realms);
+  g_variant_iter_free (iter);
 }
 
 static void
-request_realm_state_finish(GObject *object, GAsyncResult *result, gpointer data) 
+request_realm_state_finish (GObject *object, GAsyncResult *result, gpointer data)
 {
   ShellRealmTracker *self = data;
 
@@ -111,7 +162,7 @@ request_realm_state_finish(GObject *object, GAsyncResult *result, gpointer data)
 
   if (!response) {
     if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
-      g_warning("MetaRealmDbus: Error calling 'List' bus method: %s", error->message);
+      g_warning ("ShellRealmTracker: Error calling 'List' bus method: %s", error->message);
     }
     g_clear_error (&error);
     return;
@@ -122,8 +173,9 @@ request_realm_state_finish(GObject *object, GAsyncResult *result, gpointer data)
     return;
   }
 
-  realm_state_process_elements(self, response);
+  realm_state_process_elements (self, response);
-  g_variant_unref(response);
+  g_variant_unref (response);
+  subscribe_bus_signals (self);
 }
 
 static void
@@ -163,6 +215,26 @@ call_dbus_method (ShellRealmTracker *self, const gchar *method, GVariant *parame
                          user_data);
 }
 
+static GVariant *
+call_dbus_method_sync (ShellRealmTracker *self, const gchar *method, GVariant *parameters, const GVariantType *reply_type, GError **error)
+{
+  if (!self->dbus) {
+    g_warning("ShellRealmTracker: call_dbus_method_sync (%s) called when no bus connection present", method);
+    return NULL;
+  }
+  return g_dbus_connection_call_sync (self->dbus,
+                                      REALMS_BUS_NAME,
+                                      REALMS_OBJECT_PATH,
+                                      REALMS_MANAGER_INTERFACE,
+                                      method,
+                                      parameters,
+                                      reply_type,
+                                      G_DBUS_CALL_FLAGS_NONE,
+                                      -1,
+                                      NULL,
+                                      error);
+}
+
 static void
 request_realm_state(ShellRealmTracker *self)
 {
@@ -175,49 +247,42 @@ shell_realm_tracker_call_set_current (ShellRealmTracker *self, const char *realm
   call_dbus_method (self, "SetCurrent", g_variant_new("(s)", realm_name), set_realm_current_finish, NULL);
 }
 
-
+gchar *
-static void
+shell_realm_tracker_call_realm_from_citadel_pid (ShellRealmTracker *self, pid_t pid)
-unsubscribe_signals (ShellRealmTracker *self)
 {
-  for (int i = 0; i < NUM_BUS_SIGNAL_IDS; i++) {
+  GError *error = NULL;
-    if (self->bus_signal_ids[i]) {
+  GVariant *result;
-      if (self->dbus) {
-        g_dbus_connection_signal_unsubscribe(self->dbus, self->bus_signal_ids[i]);
-      }
-      self->bus_signal_ids[i] = 0;
-    }
-  }
-}
 
-static guint
+  guint32 code = 0;
-bus_signal_subscribe (ShellRealmTracker *self, const gchar *signal_name)
+  gchar *realm_name = NULL;
-{
+  gchar *retval = NULL;
-    g_assert(self->dbus);
 
-    return g_dbus_connection_signal_subscribe(self->dbus,
+  if (!self->dbus) {
-            REALMS_BUS_NAME,
+    return NULL;
-            REALMS_MANAGER_INTERFACE,
-            signal_name,
-            REALMS_OBJECT_PATH,
-            NULL,
-            G_DBUS_SIGNAL_FLAGS_NONE,
-            on_realm_bus_signal,
-            self,
-            NULL);
-}
-
-static void
-subscribe_bus_signals (ShellRealmTracker *self)
-{
-    if (self->dbus) {
-        int idx = 0;
-        self->bus_signal_ids[idx++] = bus_signal_subscribe(self, "RealmStarted");
-        self->bus_signal_ids[idx++] = bus_signal_subscribe(self, "RealmStopped");
-        self->bus_signal_ids[idx++] = bus_signal_subscribe(self, "RealmCurrent");
-        self->bus_signal_ids[idx++] = bus_signal_subscribe(self, "RealmNew");
-        self->bus_signal_ids[idx++] = bus_signal_subscribe(self, "RealmRemoved");
-        g_assert(idx == NUM_BUS_SIGNAL_IDS);
   }
+
+  result = call_dbus_method_sync (self, "RealmFromCitadelPid",
+                                  g_variant_new("(u)", pid),
+                                  G_VARIANT_TYPE("(us)"),
+                                  &error);
+
+  if (!result) {
+    if (error != NULL) {
+      g_warning ("Error calling RealmCitadelFromPid(%d): %s", pid, error->message);
+    }
+    return NULL;
+  }
+
+  g_variant_get (result, "(u&s)", &code, &realm_name);
+  // g_warning("Calling RealmFromCitadelPid(%u) -> (%d,'%s')", pid, code, realm_name);
+
+  if (code == REALM_PID_LOOKUP_REALM) {
+    retval = g_strdup (realm_name);
+  } else if (code == REALM_PID_LOOKUP_CITADEL) {
+    retval = g_strdup (CITADEL_REALM_TAG);
+  }
+  g_variant_unref (result);
+  return retval;
 }
 
 static void
@@ -231,8 +296,7 @@ on_realm_manager_appeared (GDBusConnection *connection, const gchar *name, const
   }
 
   if (!self->dbus) {
-      self->dbus = g_object_ref(connection);
+      self->dbus = g_object_ref (connection);
-      subscribe_bus_signals (self);
   } else {
       g_warning("Realm tracker already has a connection in on_realm_manager_appeared()");
   }
@@ -240,7 +304,6 @@ on_realm_manager_appeared (GDBusConnection *connection, const gchar *name, const
   request_realm_state (self);
 }
 
-
 static void
 on_realm_manager_vanished (GDBusConnection *connection, const gchar *name, gpointer user_data)
 {
@@ -255,7 +318,7 @@ on_realm_manager_vanished (GDBusConnection *connection, const gchar *name, gpoin
     g_clear_object (&self->dbus);
   }
 
-  unsubscribe_signals(self);
+  unsubscribe_signals (self);
 }
 
 /**
@@ -273,7 +336,7 @@ shell_realm_tracker_get_default(void)
   return instance;
 }
 
-void shell_realm_tracker_start ()
+void shell_realm_tracker_start (void)
 {
   ShellRealmTracker *tracker = shell_realm_tracker_get_default();
 
@@ -282,7 +345,7 @@ void shell_realm_tracker_start ()
     return;
   }
 
-  tracker->realms_watch_id = g_bus_watch_name(G_BUS_TYPE_SYSTEM,
+  tracker->realms_watch_id = g_bus_watch_name (G_BUS_TYPE_SYSTEM,
                                            REALMS_BUS_NAME,
                                            G_BUS_NAME_WATCHER_FLAGS_NONE,
                                            on_realm_manager_appeared,
@@ -305,6 +368,6 @@ shell_realm_tracker_destroy(ShellRealmTracker *self)
   self->destroy_in_progress = TRUE;
 
   // frees 'self' in destroy notifier
-  g_bus_unwatch_name(self->realms_watch_id);
+  g_bus_unwatch_name (self->realms_watch_id);
 
 }

src/shell-realm-tracker.h

@@ -7,8 +7,10 @@
 G_DECLARE_FINAL_TYPE (ShellRealmTracker, shell_realm_tracker,
                       SHELL, REALM_TRACKER, GObject)
 
-ShellRealmTracker *shell_realm_tracker_get_default(void);
+ShellRealmTracker *shell_realm_tracker_get_default (void);
 void shell_realm_tracker_call_set_current (ShellRealmTracker *self, const char *realm_name);
-void shell_realm_tracker_start ();
+gchar *shell_realm_tracker_call_realm_from_citadel_pid (ShellRealmTracker *self, pid_t pid);
+void shell_realm_tracker_start (void);
+void shell_realm_tracker_destroy (ShellRealmTracker *self);
 
 #endif /* __SHELL_REALM_TRACKER_H__ */

src/shell-realms-private.h

@@ -4,16 +4,18 @@
 #include "shell-realms.h"
 #include "shell-realms-window-frames.h"
 
+#define CITADEL_REALM_TAG "[CITADEL]"
 
 void shell_realms_untag_all (ShellRealms *realms);
 void shell_realms_remove_untagged (ShellRealms *realms);
-void shell_realms_update_realm (ShellRealms *realms,
+void shell_realms_update_contexts (ShellRealms *realms);
+void shell_realms_process_list_realm (ShellRealms *realms,
                                       const char *realm_name,
                                       const char *description,
-                                const char *namespace,
+                                      guint64 namespace,
                                       guint8 status);
 
-void shell_realms_on_realm_started (ShellRealms *realms, const gchar *realm_name, const gchar *namespace, guint8 status);
+void shell_realms_on_realm_started (ShellRealms *realms, const gchar *realm_name, guint64 namespace, guint8 status);
 void shell_realms_on_realm_current (ShellRealms *realms, const gchar *realm_name);
 void shell_realms_on_realm_stopped (ShellRealms *realms, const gchar *realm_name);
 void shell_realms_on_realm_removed (ShellRealms *realms, const gchar *realm_name);

src/shell-realms-window-frames.c

@@ -9,6 +9,7 @@
 
 struct _ShellRealmsWindowFrames {
     GObject parent;
+    ShellRealms *realms;
     GSettings *settings;
     GHashTable *realm_frame_colors;
     GList *default_colors;
@@ -24,6 +25,17 @@ enum {
 
 static guint shell_realms_window_frames_signals [LAST_SIGNAL] = { 0 };
 
+ShellRealmsWindowFrames *
+shell_realms_window_frames_new (ShellRealms *realms)
+{
+  ShellRealmsWindowFrames *frames;
+
+  frames = g_object_new (SHELL_TYPE_REALMS_WINDOW_FRAMES, NULL);
+
+  frames->realms = realms;
+  return frames;
+}
+
 static void
 shell_realms_window_frames_process_color (ShellRealmsWindowFrames *frames, const char *entry)
 {
@@ -32,13 +44,13 @@ shell_realms_window_frames_process_color (ShellRealmsWindowFrames *frames, const
   gchar **split = g_strsplit (entry, ":", -1);
 
   if (g_strv_length (split) != 2) {
-    g_warning("ShellRealmsWindowFrames: Unable to parse realm-frame-colors entry: %s", entry);
+    g_warning ("ShellRealmsWindowFrames: Unable to parse realm-frame-colors entry: %s", entry);
     g_strfreev (split);
     return;
   }
 
   if (!gdk_rgba_parse (&rgba, split[1])) {
-    g_warning("ShellRealmsWindowFrames: Failed to parse RGBA component of realm frame color entry: %s", entry);
+    g_warning ("ShellRealmsWindowFrames: Failed to parse RGBA component of realm frame color entry: %s", entry);
   } else {
     g_hash_table_insert (frames->realm_frame_colors, g_strdup (split[0]), gdk_rgba_copy (&rgba));
   }
@@ -62,7 +74,7 @@ load_realm_frame_colors (ShellRealmsWindowFrames *frames)
 }
 
 static void
-on_realm_frame_colors_changed(GSettings *settings, const gchar *key, ShellRealmsWindowFrames *frames)
+on_realm_frame_colors_changed (GSettings *settings, const gchar *key, ShellRealmsWindowFrames *frames)
 {
   load_realm_frame_colors (frames);
   g_signal_emit (frames, shell_realms_window_frames_signals[REALM_FRAME_COLORS_CHANGED], 0);
@@ -78,7 +90,7 @@ load_default_colors (ShellRealmsWindowFrames *frames)
   entries = g_settings_get_strv (frames->settings, FRAME_COLOR_LIST_KEY);
   n_entries = g_strv_length (entries);
 
-  g_clear_list(&frames->default_colors, (GDestroyNotify) gdk_rgba_free);
+  g_clear_list (&frames->default_colors, (GDestroyNotify) gdk_rgba_free);
 
   for (i = 0; i < n_entries; i++) {
     if (gdk_rgba_parse (&rgba, entries[i])) {
@@ -102,12 +114,12 @@ shell_realms_window_frames_init (ShellRealmsWindowFrames *frames)
   frames->default_colors = NULL;
   frames->frame_disabled_windows = NULL;
 
-  g_signal_connect(frames->settings,
+  g_signal_connect (frames->settings,
                    "changed::" FRAME_COLOR_LIST_KEY,
                    G_CALLBACK(on_frame_color_list_changed),
                    frames);
 
-  g_signal_connect(frames->settings,
+  g_signal_connect (frames->settings,
                    "changed::" REALM_FRAME_COLORS_KEY,
                    G_CALLBACK(on_realm_frame_colors_changed),
                    frames);
@@ -172,7 +184,7 @@ add_to_disabled_list (ShellRealmsWindowFrames *frames, guint32 window_id)
 }
 
 static gint
-color_compare(gconstpointer c1, gconstpointer c2) {
+color_compare (gconstpointer c1, gconstpointer c2) {
   return gdk_rgba_equal (c1, c2) ? 0 : 1;
 }
 
@@ -199,7 +211,7 @@ allocate_color (ShellRealmsWindowFrames *frames)
   g_list_free (used_colors);
 
   // 3) Choose a random element of the default list
-  guint index = (guint) g_random_int_range(0, (gint32) n_colors);
+  guint index = (guint) g_random_int_range (0, (gint32) n_colors);
   return g_list_nth_data (frames->default_colors, index);
 }
 
@@ -209,11 +221,11 @@ shell_realms_window_frames_store_colors (ShellRealmsWindowFrames *frames)
   GHashTableIter iter;
   gpointer key, value;
 
-  GPtrArray *entries = g_ptr_array_new_with_free_func(g_free);
+  GPtrArray *entries = g_ptr_array_new_with_free_func (g_free);
 
   g_hash_table_iter_init (&iter, frames->realm_frame_colors);
 
-  while (g_hash_table_iter_next(&iter, &key, &value)) {
+  while (g_hash_table_iter_next (&iter, &key, &value)) {
     gchar *name = key;
     GdkRGBA *rgba = value;
     char *rgba_str = gdk_rgba_to_string (rgba);
@@ -230,10 +242,10 @@ shell_realms_window_frames_store_colors (ShellRealmsWindowFrames *frames)
 }
 
 static const char *
-shell_realms_window_frames_realm_name_for_window (ShellRealmsWindowFrames *frames, ShellRealms *realms, MetaWindow *window)
+shell_realms_window_frames_realm_name_for_window (ShellRealmsWindowFrames *frames, MetaWindow *window)
 {
 
-  ShellRealmItem *realm = shell_realms_realm_by_window (realms, window);
+  ShellRealmItem *realm = shell_realms_realm_by_window (frames->realms, window);
 
   if (realm) {
     return shell_realm_item_get_realm_name (realm);
@@ -292,7 +304,7 @@ shell_realms_window_frames_is_frame_enabled (ShellRealmsWindowFrames *frames, Me
 gboolean
 shell_realms_window_frames_has_frame (ShellRealmsWindowFrames *frames, MetaWindow *window)
 {
-  return !is_ignored_window(window) && meta_window_is_on_foreign_workspace_context (window);
+  return !is_ignored_window (window) && shell_realms_is_foreign_window (frames->realms, window);
 }
 
 /**
@@ -342,9 +354,11 @@ shell_realms_window_frames_color_for_window (ShellRealmsWindowFrames *frames, Me
     return NULL;
   }
 
-  ShellRealms *realms = shell_realms_get_default();
+  const gchar *name = shell_realms_window_frames_realm_name_for_window (frames, window);
 
-  const gchar *name = shell_realms_window_frames_realm_name_for_window (frames, realms, window);
+  if (name == NULL) {
+    return NULL;
+  }
 
   GdkRGBA *rgba = g_hash_table_lookup (frames->realm_frame_colors, name);
 
@@ -376,11 +390,9 @@ shell_realms_window_frames_label_for_window (ShellRealmsWindowFrames *frames, Me
     return NULL;
   }
 
-  ShellRealms *realms = shell_realms_get_default();
+  if (shell_realms_is_citadel_window (frames->realms, window)) {
-
-  if (shell_realms_is_citadel_window (realms, window)) {
     return "Citadel";
   } else {
-    return shell_realms_window_frames_realm_name_for_window (frames, realms, window);
+    return shell_realms_window_frames_realm_name_for_window (frames, window);
   }
 }

src/shell-realms-window-frames.h

@@ -8,6 +8,9 @@
 #define SHELL_TYPE_REALMS_WINDOW_FRAMES (shell_realms_window_frames_get_type())
 G_DECLARE_FINAL_TYPE (ShellRealmsWindowFrames, shell_realms_window_frames, SHELL, REALMS_WINDOW_FRAMES, GObject)
 
+typedef struct _ShellRealms ShellRealms;
+
+ShellRealmsWindowFrames *shell_realms_window_frames_new (ShellRealms *realms);
 gboolean shell_realms_window_frames_has_frame (ShellRealmsWindowFrames *frames, MetaWindow *window);
 gboolean shell_realms_window_frames_is_frame_enabled (ShellRealmsWindowFrames *frames, MetaWindow *window);
 void shell_realms_window_frames_set_frame_enabled (ShellRealmsWindowFrames *frames, MetaWindow *window, gboolean enabled);

src/shell-realms.c

@@ -50,8 +50,12 @@ shell_realms_current_realm (ShellRealms *realms)
  *  if name not found
  */
 ShellRealmItem *
-shell_realms_realm_by_name(ShellRealms *realms, const gchar *realm_name)
+shell_realms_realm_by_name (ShellRealms *realms, const gchar *realm_name)
 {
+  if (realm_name == NULL) {
+    return NULL;
+  }
+
   ShellRealmItem *item = g_hash_table_lookup (realms->realms, realm_name);
   if (!item) {
     g_warning("ShellRealms: No realm found for name '%s'", realm_name);
@@ -83,6 +87,17 @@ shell_realms_realm_by_context_id (ShellRealms *realms, guint context_id)
   return NULL;
 }
 
+static gchar *
+realm_name_from_window_pid (ShellRealms *realms, MetaWindow *window)
+{
+  ShellRealmTracker *tracker = shell_realm_tracker_get_default();
+  pid_t pid = meta_window_get_pid (window);
+  if (pid > 0) {
+    return shell_realm_tracker_call_realm_from_citadel_pid (tracker, pid);
+  }
+  return NULL;
+}
+
 /**
  * shell_realms_realm_by_window:
  * @realms: a #ShellRealms instance
@@ -94,19 +109,14 @@ shell_realms_realm_by_context_id (ShellRealms *realms, guint context_id)
 ShellRealmItem *
 shell_realms_realm_by_window (ShellRealms *realms, MetaWindow *window)
 {
-  const char *window_ns = meta_window_namespace (window);
+  ShellRealmItem *realm = NULL;
-
+  gchar *realm_name = realm_name_from_window_pid (realms, window);
-  if (!window_ns) {
+  // g_warning("shell_realms_realm_by_window() realm_name=%s", realm_name);
-    return NULL;
+  if (realm_name && g_strcmp0 (CITADEL_REALM_TAG, realm_name)) {
+    realm = shell_realms_realm_by_name (realms, realm_name);
   }
-
+  g_free(realm_name);
-  for (GList *iter = realms->running_realms; iter; iter = iter->next) {
+  return realm;
-    ShellRealmItem *item = iter->data;
-    if (g_strcmp0 (window_ns, shell_realm_item_get_namespace (item)) == 0) {
-      return item;
-    }
-  }
-  return NULL;
 }
 
 /**
@@ -122,13 +132,26 @@ shell_realms_realm_by_window (ShellRealms *realms, MetaWindow *window)
 gboolean
 shell_realms_is_citadel_window (ShellRealms *realms, MetaWindow *window)
 {
-  MetaDisplay *display = shell_global_get_display (shell_global_get());
+  gchar *realm_name = realm_name_from_window_pid (realms, window);
-  MetaWorkspaceManager *workspace_manager = meta_display_get_workspace_manager (display);
+  gboolean is_citadel = g_strcmp0 (CITADEL_REALM_TAG, realm_name) == 0;
+  g_free(realm_name);
+  return is_citadel;
+}
 
-  const char *mutter_ns = meta_workspace_manager_mutter_namespace (workspace_manager);
-  const char *window_ns = meta_window_namespace (window);
 
-  return g_strcmp0 (mutter_ns, window_ns) == 0;
+gboolean
+shell_realms_is_foreign_window (ShellRealms *realms, MetaWindow *window)
+{
+  MetaWorkspace *workspace = meta_window_get_workspace (window);
+  guint current_id = meta_workspace_get_context_id (workspace);
+
+  ShellRealmItem *realm_item = shell_realms_realm_by_window (realms, window);
+
+  if (current_id && realm_item) {
+    guint realm_id = shell_realm_item_get_context_id (realm_item);
+    return current_id != realm_id;
+  }
+  return FALSE;
 }
 
 /**
@@ -237,9 +260,11 @@ static ShellRealmItem *
 shell_realms_add_realm_item (ShellRealms *realms,
                              const char *realm_name,
                              const char *description,
-                             const char *namespace,
+                             guint64 namespace,
                              guint8 status)
 {
+  g_assert (realm_name != NULL);
+
   ShellRealmItem *item = g_hash_table_lookup (realms->realms, realm_name);
   if (item) {
     shell_realm_item_update (item, realm_name, namespace, status);
@@ -249,27 +274,120 @@ shell_realms_add_realm_item (ShellRealms *realms,
   item = shell_realm_item_new (realm_name, description, namespace, status);
 
   if (shell_realm_item_is_system (item)) {
-    g_clear_object(&item);
+    g_clear_object (&item);
     return NULL;
   }
   g_hash_table_insert (realms->realms, g_strdup (realm_name), item);
   return item;
 }
 
-void
+static void
-shell_realms_update_realm (ShellRealms *realms,
+remove_workspace_context (ShellRealmItem *realm)
-                           const char *realm_name,
-                           const char *description,
-                           const char *namespace,
-                           guint8 status)
 {
-  ShellRealmItem *item = shell_realms_add_realm_item (realms, realm_name, description, namespace, status);
+  MetaWorkspaceContext *context = shell_realm_item_get_context (realm);
+  if (context) {
+    shell_realm_item_set_context (realm, NULL);
+    if (!meta_workspace_context_is_current (context)) {
+      meta_workspace_context_remove (context);
+    }
+  }
+}
 
-  // Ignore system realms
+static ShellRealmItem *
-  if (!item) {
+find_realm_with_context (ShellRealms *realms, MetaWorkspaceContext *context)
+{
+  GHashTableIter iter;
+  gpointer value;
+
+  if (context == NULL) {
+    return NULL;
+  }
+
+  g_hash_table_iter_init (&iter, realms->realms);
+  while (g_hash_table_iter_next (&iter, NULL, &value)) {
+    ShellRealmItem *item = value;
+    if (shell_realm_item_get_context (item) == context) {
+      return item;
+    }
+  }
+  return NULL;
+}
+
+static void
+acquire_active_workspace_context (ShellRealms *realms, ShellRealmItem *realm)
+{
+
+  MetaDisplay *display = shell_global_get_display (shell_global_get ());
+  MetaWorkspaceManager *workspace_manager = meta_display_get_workspace_manager (display);
+  MetaWorkspaceContext *active_context = meta_workspace_manager_active_context (workspace_manager);
+
+  if (shell_realm_item_get_context (realm) == active_context) {
     return;
   }
 
+  if (!shell_realm_item_is_current (realm)) {
+    g_warning ("ShellRealms: Cannot acquire active workspace context for realm that is not the current realm");
+    return;
+  }
+
+  ShellRealmItem *other_realm = find_realm_with_context (realms, active_context);
+
+  if (other_realm) {
+    g_warning ("Stealing active workspace context from realm-%s for realm-%s",
+               shell_realm_item_get_realm_name(other_realm),
+               shell_realm_item_get_realm_name(realm));
+
+    if (shell_realm_item_is_current (other_realm)) {
+      shell_realm_item_set_current_flag (other_realm, false);
+    }
+
+    shell_realm_item_set_context (other_realm, NULL);
+
+    if (shell_realm_item_is_running (other_realm)) {
+      MetaWorkspaceContext *context = meta_workspace_context_new(workspace_manager);
+      shell_realm_item_set_context(other_realm, context);
+    }
+  }
+
+  shell_realm_item_set_context (realm, active_context);
+}
+
+static void
+acquire_workspace_context (ShellRealms *realms, ShellRealmItem *realm)
+{
+
+  if (shell_realm_item_is_system (realm) || shell_realm_item_get_context (realm) != NULL) {
+    return;
+  }
+
+  if (shell_realm_item_is_current (realm)) {
+    acquire_active_workspace_context (realms, realm);
+    return;
+  }
+
+  MetaDisplay *display = shell_global_get_display(shell_global_get());
+  MetaWorkspaceManager *workspace_manager = meta_display_get_workspace_manager(display);
+  MetaWorkspaceContext *context = meta_workspace_context_new(workspace_manager);
+
+  shell_realm_item_set_context(realm, context);
+
+}
+
+void
+shell_realms_process_list_realm (ShellRealms *realms,
+                                 const char *realm_name,
+                                 const char *description,
+                                 guint64 namespace,
+                                 guint8 status)
+{
+
+  // Ignore system realms
+  if (shell_realm_is_flag_set (status, SHELL_REALM_ITEM_STATUS_SYSTEM)) {
+    return;
+  }
+
+  ShellRealmItem *item = shell_realms_add_realm_item (realms, realm_name, description, namespace, status);
+
   shell_realms_update_running_list_for_item (realms, item);
   shell_realm_item_set_tagged (item, TRUE);
 
@@ -277,7 +395,11 @@ shell_realms_update_realm (ShellRealms *realms,
   // first context requested is for the current realm.
   if (shell_realm_item_is_current (item)) {
     shell_realms_set_current_item (realms, item);
-    shell_realm_item_acquire_context (item);
+    acquire_workspace_context (realms, item);
+  }
+
+  if (!shell_realm_item_is_running (item) && shell_realm_item_get_context (item) != NULL) {
+    remove_workspace_context (item);
   }
 }
 
@@ -312,26 +434,47 @@ shell_realms_remove_untagged (ShellRealms *realms)
     ShellRealmItem *item = value;
     if (!shell_realm_item_is_tagged (item)) {
       shell_realms_remove_running_realm (realms, item);
+      remove_workspace_context (item);
       g_hash_table_iter_remove (&iter);
     }
   }
 }
 
+void
+shell_realms_update_contexts (ShellRealms *realms) {
+  for (GList *iter = realms->running_realms; iter; iter = iter->next) {
+    ShellRealmItem *item = iter->data;
+    if (shell_realm_item_get_context (item) == NULL) {
+      acquire_workspace_context (realms, item);
+    }
+  }
+}
+
 // Signal handlers
 
 void
-shell_realms_on_realm_started (ShellRealms *realms, const gchar *realm_name, const gchar *namespace, guint8 status)
+shell_realms_on_realm_started (ShellRealms *realms, const gchar *realm_name, guint64 namespace, guint8 status)
 {
   ShellRealmItem *item = shell_realms_realm_by_name (realms, realm_name);
   if (item) {
     shell_realm_item_update (item, realm_name, namespace, status);
     if (!shell_realm_item_is_system (item)) {
       shell_realms_update_running_list_for_item (realms, item);
-      shell_realm_item_acquire_context (item);
+      acquire_workspace_context(realms, item);
     }
   }
 }
 
+static void
+activate_workspace_context (ShellRealmItem *realm)
+{
+  MetaWorkspaceContext *context = shell_realm_item_get_context (realm);
+  if (context) {
+    meta_workspace_context_activate (context);
+  }
+}
+
+
 void
 shell_realms_on_realm_current (ShellRealms *realms, const gchar *realm_name)
 {
@@ -340,7 +483,7 @@ shell_realms_on_realm_current (ShellRealms *realms, const gchar *realm_name)
   if (item && realms->current_realm != item) {
     shell_realms_set_current_item (realms, item);
     shell_realms_update_running_list_for_item (realms, item);
-    shell_realm_item_activate_context (item);
+    activate_workspace_context (item);
     g_signal_emit (realms, shell_realms_signals[REALM_CONTEXT_SWITCHED], 0);
   }
 }
@@ -351,6 +494,7 @@ shell_realms_on_realm_stopped (ShellRealms *realms, const gchar *realm_name)
   ShellRealmItem *item = shell_realms_realm_by_name (realms, realm_name);
   if (item) {
     shell_realm_item_set_running_flag (item, FALSE);
+    remove_workspace_context (item);
     shell_realms_remove_running_realm (realms, item);
   }
 }
@@ -360,6 +504,9 @@ shell_realms_on_realm_removed (ShellRealms *realms, const gchar *realm_name)
 {
   ShellRealmItem *item = shell_realms_realm_by_name (realms, realm_name);
   if (item) {
+    shell_realm_item_set_running_flag (item, FALSE);
+    remove_workspace_context (item);
+
     shell_realms_remove_running_realm (realms, item);
     g_hash_table_remove (realms->realms, realm_name);
   }
@@ -368,10 +515,14 @@ shell_realms_on_realm_removed (ShellRealms *realms, const gchar *realm_name)
 void
 shell_realms_on_realm_new (ShellRealms *realms, const gchar *realm_name, const gchar *description, guint8 status)
 {
+  if (realm_name == NULL || shell_realm_is_flag_set (status, SHELL_REALM_ITEM_STATUS_SYSTEM)) {
+    return;
+  }
+
   if (!g_hash_table_contains (realms->realms, realm_name)) {
-    (void) shell_realms_add_realm_item (realms, realm_name, description, NULL, status);
+    (void) shell_realms_add_realm_item (realms, realm_name, description, 0, status);
   } else {
-    g_warning("ShellRealms: RealmNew signal received for realm '%s' but it already exists", realm_name);
+    g_warning ("ShellRealms: RealmNew signal received for realm '%s' but it already exists", realm_name);
   }
 }
 
@@ -397,7 +548,7 @@ shell_realms_init(ShellRealms *realms)
   realms->realms = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_object_unref);
   realms->running_realms = NULL;
   realms->current_realm = NULL;
-  realms->frames = g_object_new (SHELL_TYPE_REALMS_WINDOW_FRAMES, NULL);
+  realms->frames = shell_realms_window_frames_new (realms);
 }
 
 static void

src/shell-realms.h

@@ -13,10 +13,11 @@ ShellRealms *shell_realms_get_default(void);
 
 
 ShellRealmItem *shell_realms_current_realm (ShellRealms *realms);
-ShellRealmItem *shell_realms_realm_by_name(ShellRealms *realms, const gchar *realm_name);
+ShellRealmItem *shell_realms_realm_by_name (ShellRealms *realms, const gchar *realm_name);
 ShellRealmItem *shell_realms_realm_by_context_id (ShellRealms *realms, guint context_id);
 ShellRealmItem *shell_realms_realm_by_window (ShellRealms *realms, MetaWindow *window);
 gboolean shell_realms_is_citadel_window (ShellRealms *realms, MetaWindow *window);
+gboolean shell_realms_is_foreign_window (ShellRealms *realms, MetaWindow *window);
 
 ShellRealmsWindowFrames *shell_realms_window_frames (ShellRealms *realms);
 

src/shell-window-tracker.c

@@ -217,6 +217,9 @@ get_app_from_window_wmclass (MetaWindow  *window)
 
   /* first try a match from WM_CLASS (instance part) to StartupWMClass */
   wm_instance = meta_window_get_wm_class_instance (window);
+  if (realm_name) {
+    // g_warning ("ShellWindowTracker: get_app_from_window_class(wmclass: %s, realm: %s)", wm_instance, realm_name);
+  }
   app = shell_app_system_lookup_startup_wmclass (appsys, wm_instance, realm_name);
   if (app != NULL && check_app_id_prefix (app, app_prefix))
     return g_object_ref (app);