tui: fix quitting from "nmtui edit CONN-ID"

If you launched nmtui directly into the editor for a specific
connection, it would hang with a blank screen when you quit.

Fix this by changing the way startup works a bit, and have the created
toplevel NmtNewtForm get returned all the way to nmtui.c, which can
then connect to the "quit" signal on it and quit (rather than having
the different subprograms trying to guess whether they're supposed to
quit-on-exit or not).

tui/nmtui-connect.c

@@ -236,14 +236,7 @@ listbox_active_changed (GObject    *object,
 	}
 }
 
-static void
-form_quit (NmtNewtForm *form,
-           gpointer     user_data)
-{
-	nmtui_quit ();
-}
-
-static void
+static NmtNewtForm *
 nmt_connect_connection_list (void)
 {
 	int screen_width, screen_height;
@@ -257,7 +250,6 @@ nmt_connect_connection_list (void)
 	                     "height", screen_height - 4,
 	                     "escape-exits", TRUE,
 	                     NULL);
-	g_signal_connect (form, "quit", G_CALLBACK (form_quit), NULL);
 
 	grid = nmt_newt_grid_new ();
 
@@ -281,11 +273,10 @@ nmt_connect_connection_list (void)
 	nmt_newt_widget_set_exit_on_activate (quit, TRUE);
 
 	nmt_newt_form_set_content (form, grid);
-	nmt_newt_form_show (form);
-	g_object_unref (form);
+	return form;
 }
 
-static void
+static NmtNewtForm *
 nmt_connect_connection (const char *identifier)
 {
 	NmtNewtWidget *list;
@@ -308,14 +299,14 @@ nmt_connect_connection (const char *identifier)
 		activate_connection (connection, device, specific_object);
 	g_object_unref (list);
 
-	nmtui_quit ();
+	return NULL;
 }
 
-void
+NmtNewtForm *
 nmtui_connect (int argc, char **argv)
 {
 	if (argc == 2)
-		nmt_connect_connection (argv[1]);
+		return nmt_connect_connection (argv[1]);
 	else
-		nmt_connect_connection_list ();
+		return nmt_connect_connection_list ();
 }

tui/nmtui-connect.h

@@ -21,7 +21,7 @@
 
 G_BEGIN_DECLS
 
-void nmtui_connect (int argc, char **argv);
+NmtNewtForm *nmtui_connect (int argc, char **argv);
 
 G_END_DECLS
 

tui/nmtui-edit.c

@@ -77,14 +77,7 @@ edit_connection_list_filter (NmtEditConnectionList *list,
 	return (nm_setting_connection_get_slave_type (s_con) == NULL);
 }
 
-static void
-form_quit (NmtNewtForm *form,
-           gpointer     user_data)
-{
-	nmtui_quit ();
-}
-
-static void
+static NmtNewtForm *
 nmt_edit_main_connection_list (void)
 {
 	int screen_width, screen_height;
@@ -98,7 +91,6 @@ nmt_edit_main_connection_list (void)
 	                     "height", screen_height - 4,
 	                     "escape-exits", TRUE,
 	                     NULL);
-	g_signal_connect (form, "quit", G_CALLBACK (form_quit), NULL);
 
 	quit = nmt_newt_button_new (_("Quit"));
 	nmt_newt_widget_set_exit_on_activate (quit, TRUE);
@@ -116,8 +108,7 @@ nmt_edit_main_connection_list (void)
 	                  G_CALLBACK (list_remove_connection), form);
 
 	nmt_newt_form_set_content (form, list);
-	nmt_newt_form_show (form);
-	g_object_unref (form);
+	return form;
 }
 
 #define NMT_TYPE_ADD_CONNECTION    (nmt_add_connection_get_type ())
@@ -492,7 +483,7 @@ nmt_remove_connection (NMRemoteConnection *connection)
 	g_object_unref (connection);
 }
 
-void
+NmtNewtForm *
 nmtui_edit (int argc, char **argv)
 {
 	NMConnection *conn = NULL;
@@ -505,11 +496,10 @@ nmtui_edit (int argc, char **argv)
 
 		if (!conn) {
 			nmt_newt_message_dialog ("%s: no such connection '%s'\n", argv[0], argv[1]);
-			nmtui_quit ();
-			return;
+			return NULL;
 		}
 
-		nmt_edit_connection (conn);
+		return nmt_editor_new (conn);
 	} else
-		nmt_edit_main_connection_list ();
+		return nmt_edit_main_connection_list ();
 }

tui/nmtui-edit.h

@@ -26,7 +26,7 @@ G_BEGIN_DECLS
 typedef gboolean (*NmtAddConnectionTypeFilter) (GType    connection_type,
                                                 gpointer user_data);
 
-void nmtui_edit (int argc, char **argv);
+NmtNewtForm *nmtui_edit (int argc, char **argv);
 
 void nmt_add_connection      (void);
 void nmt_add_connection_full (const char                 *primary_text,

tui/nmtui-hostname.c

@@ -93,7 +93,7 @@ hostname_set (NMRemoteSettings *settings,
 	nmt_sync_op_complete_boolean (op, error == NULL, error);
 }
 
-void
+NmtNewtForm *
 nmtui_hostname (int argc, char **argv)
 {
 	const char *hostname;
@@ -120,5 +120,5 @@ nmtui_hostname (int argc, char **argv)
 		g_free (tmp);
 	}
 
-	nmtui_quit ();
+	return NULL;
 }

tui/nmtui-hostname.h

@@ -21,7 +21,7 @@
 
 G_BEGIN_DECLS
 
-void nmtui_hostname (int argc, char **argv);
+NmtNewtForm *nmtui_hostname (int argc, char **argv);
 
 G_END_DECLS
 

tui/nmtui.c

@@ -49,7 +49,7 @@ NMClient *nm_client;
 NMRemoteSettings *nm_settings;
 static GMainLoop *loop;
 
-typedef void (*NmtuiSubprogram) (int argc, char **argv);
+typedef NmtNewtForm * (*NmtuiSubprogram) (int argc, char **argv);
 
 static const struct {
 	const char *name, *shortcut, *arg;
@@ -74,7 +74,7 @@ quit_func (int argc, char **argv)
 	nmtui_quit ();
 }
 
-static void
+static NmtNewtForm *
 nmtui_main (int argc, char **argv)
 {
 	NmtNewtForm *form;
@@ -124,7 +124,10 @@ nmtui_main (int argc, char **argv)
 	subprogram = nmt_newt_listbox_get_active_key (listbox);
 	g_object_unref (form);
 
-	subprogram (argc, argv);
+	if (subprogram)
+		return subprogram (argc, argv);
+	else
+		return NULL;
 }
 
 /**
@@ -177,12 +180,27 @@ typedef struct {
 	char **argv;
 } NmtuiStartupData;
 
+static void
+toplevel_form_quit (NmtNewtForm *form,
+                    gpointer     user_data)
+{
+       nmtui_quit ();
+}
+
 static gboolean
 idle_run_subprogram (gpointer user_data)
 {
 	NmtuiStartupData *data = user_data;
+	NmtNewtForm *form;
+
+	form = data->subprogram (data->argc, data->argv);
+	if (form) {
+		g_signal_connect (form, "quit", G_CALLBACK (toplevel_form_quit), NULL);
+		nmt_newt_form_show (form);
+		g_object_unref (form);
+	} else
+		nmtui_quit ();
 
-	data->subprogram (data->argc, data->argv);
 	return FALSE;
 }