exit on close (i.e. never daemonize)

default.nix

@@ -0,0 +1,46 @@
+# build with: `nix-build`
+# make sure to first checkout the submodules: `git submodule update --init --recursive`
+#
+{ pkgs ? import <nixpkgs> {} }:
+let
+  inherit (pkgs) stdenv;
+in stdenv.mkDerivation {
+  pname = "calls";
+  version = "unstable";
+  src = ./.;
+
+  nativeBuildInputs = with pkgs; [
+    appstream-glib
+    dbus
+    desktop-file-utils
+    docbook-xsl-nons
+    docbook_xml_dtd_43
+    docutils
+    gtk-doc
+    meson
+    ninja
+    pkg-config
+    vala
+    wrapGAppsHook4
+  ];
+
+  buildInputs = with pkgs; [
+    callaudiod
+    evolution-data-server
+    feedbackd
+    folks
+    gom
+    gsound
+    gst_all_1.gst-plugins-bad
+    gst_all_1.gst-plugins-base
+    gst_all_1.gst-plugins-good
+    gst_all_1.gst-plugins-ugly
+    gst_all_1.gstreamer
+    gtk3
+    libadwaita
+    libpeas2
+    libsecret
+    modemmanager
+    sofia_sip
+  ];
+}

src/calls-application.c

@@ -597,11 +597,16 @@ notify_window_visible_cb (GtkWidget        *window,
   CallsManager *manager = calls_manager_get_default ();
 
   g_return_if_fail (CALLS_IS_APPLICATION (application));
-  g_return_if_fail (CALLS_IS_CALL_WINDOW (window));
 
+  gboolean calls_visible = gtk_widget_is_visible (GTK_WIDGET (application->call_window));
+  gboolean main_visible = gtk_widget_is_visible (GTK_WIDGET (application->main_window));
   /* The UI is being closed, hang up active calls */
-  if (!gtk_widget_is_visible (window))
+  if (!calls_visible)
     calls_manager_hang_up_all_calls (manager);
+
+  /* No windows (of interest) are open -> exit */
+  if (!main_visible && !calls_visible)
+    app_shutdown (G_APPLICATION (application));
 }
 
 
@@ -667,6 +672,12 @@ start_proper (CallsApplication *self)
                            G_CALLBACK (notify_window_visible_cb),
                            self,
                            G_CONNECT_AFTER);
+
+  g_signal_connect_object (self->main_window,
+                           "notify::visible",
+                           G_CALLBACK (notify_window_visible_cb),
+                           self,
+                           G_CONNECT_AFTER);
 }