Start up in daemon mode when GNOME starts

Hat tip to Guido for the session.{c,h} files. Closes #45
2019-08-08 14:38:28 +01:00
parent fc16ec7a71
commit 646682b878
6 changed files with 190 additions and 0 deletions
--- a/src/session.c
+++ b/src/session.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2018, 2019 Purism SPC
+ * SPDX-License-Identifier: GPL-3.0+
+ * Author: Guido Günther <agx@sigxcpu.org>
+ *
+ * Copied from phosh and modified for Calls
+ * by Bob Ham <bob.ham@puri.sm>
+ *
+ * Based on code from gnome-settings-daemon
+ */
+
+#define G_LOG_DOMAIN "calls-session"
+
+#include "session.h"
+
+#include <gio/gio.h>
+#include <gtk/gtk.h>
+
+#define GNOME_SESSION_DBUS_NAME      "org.gnome.SessionManager"
+#define GNOME_SESSION_DBUS_OBJECT    "/org/gnome/SessionManager"
+#define GNOME_SESSION_DBUS_INTERFACE "org.gnome.SessionManager"
+#define GNOME_SESSION_CLIENT_PRIVATE_DBUS_INTERFACE "org.gnome.SessionManager.ClientPrivate"
+
+static GDBusProxy *_proxy;
+
+
+static void
+respond_to_end_session (GDBusProxy *proxy)
+{
+        /* we must answer with "EndSessionResponse" */
+        g_dbus_proxy_call (proxy, "EndSessionResponse",
+                           g_variant_new ("(bs)", TRUE, ""),
+                           G_DBUS_CALL_FLAGS_NONE,
+                           -1, NULL, NULL, NULL);
+}
+
+
+static void
+do_stop (void)
+{
+        gtk_main_quit ();
+}
+
+
+static void
+client_proxy_signal_cb (GDBusProxy *proxy,
+                        gchar *sender_name,
+                        gchar *signal_name,
+                        GVariant *parameters,
+                        gpointer user_data)
+{
+        if (g_strcmp0 (signal_name, "QueryEndSession") == 0) {
+                g_debug ("Got QueryEndSession signal");
+                respond_to_end_session (proxy);
+        } else if (g_strcmp0 (signal_name, "EndSession") == 0) {
+                g_debug ("Got EndSession signal");
+                respond_to_end_session (proxy);
+        } else if (g_strcmp0 (signal_name, "Stop") == 0) {
+                g_debug ("Got Stop signal");
+                do_stop ();
+        }
+}
+
+
+static void
+on_client_registered (GObject             *source_object,
+                      GAsyncResult        *res,
+                      gpointer             user_data)
+{
+  GVariant *variant;
+  GDBusProxy *client_proxy;
+  GError *error = NULL;
+  gchar *object_path = NULL;
+
+  variant = g_dbus_proxy_call_finish (G_DBUS_PROXY (source_object), res, &error);
+  if (!variant) {
+    g_warning ("Unable to register client: %s", error->message);
+    g_error_free (error);
+    return;
+  }
+
+  g_variant_get (variant, "(o)", &object_path);
+
+  g_debug ("Registered client at path %s", object_path);
+
+  client_proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION, 0, NULL,
+                                                GNOME_SESSION_DBUS_NAME,
+                                                object_path,
+                                                GNOME_SESSION_CLIENT_PRIVATE_DBUS_INTERFACE,
+                                                NULL,
+                                                &error);
+  if (!client_proxy) {
+    g_warning ("Unable to get the session client proxy: %s", error->message);
+    g_error_free (error);
+    return;
+  }
+
+  g_signal_connect (client_proxy, "g-signal",
+                    G_CALLBACK (client_proxy_signal_cb), NULL);
+
+  g_free (object_path);
+  g_variant_unref (variant);
+}
+
+
+void
+calls_session_register (const char *client_id)
+{
+  const char *startup_id;
+  GError *err = NULL;
+
+  if (!_proxy) {
+    _proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
+                                            G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES |
+                                            G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START_AT_CONSTRUCTION,
+                                            NULL,
+                                            GNOME_SESSION_DBUS_NAME,
+                                            GNOME_SESSION_DBUS_OBJECT,
+                                            GNOME_SESSION_DBUS_INTERFACE,
+                                            NULL,
+                                            &err);
+    if (!_proxy) {
+      g_debug ("Failed to contact gnome-session: %s", err->message);
+      g_clear_error (&err);
+      return;
+    }
+  };
+
+  startup_id = g_getenv ("DESKTOP_AUTOSTART_ID");
+  g_dbus_proxy_call (_proxy,
+                     "RegisterClient",
+                     g_variant_new ("(ss)", client_id, startup_id ? startup_id : ""),
+                     G_DBUS_CALL_FLAGS_NONE,
+                     -1,
+                     NULL,
+                     (GAsyncReadyCallback) on_client_registered,
+                     NULL);
+}
+
+
+void
+calls_session_unregister (void)
+{
+  g_clear_object (&_proxy);
+}