Add functionality shared between plugins to detect if the current session is active

3 files changed, 376 insertions, 0 deletions

diff --git a/gnome-settings-daemon/Makefile.am b/gnome-settings-daemon/Makefile.am
index 69a614ce..2c72233d 100644
--- a/gnome-settings-daemon/Makefile.am
+++ b/gnome-settings-daemon/Makefile.am
@@ -57,6 +57,8 @@ gnome_settings_daemon_SOURCES =		\
 	gnome-settings-plugin-info.h	\
 	gnome-settings-module.c		\
 	gnome-settings-module.h		\
+	gnome-settings-session.c	\
+	gnome-settings-session.h	\
 	$(NULL)
 
 gnome_settings_daemon_CPPFLAGS = \
diff --git a/gnome-settings-daemon/gnome-settings-session.c b/gnome-settings-daemon/gnome-settings-session.c
new file mode 100644
index 00000000..23023046
--- /dev/null
+++ b/gnome-settings-daemon/gnome-settings-session.c
@@ -0,0 +1,310 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2006-2011 Richard Hughes <richard@hughsie.com>
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <glib.h>
+#include <gio/gio.h>
+
+#include "gnome-settings-session.h"
+
+static void     gnome_settings_session_finalize	(GObject		*object);
+
+#define GNOME_SETTINGS_SESSION_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GNOME_TYPE_SETTINGS_SESSION, GnomeSettingsSessionPrivate))
+
+#define CONSOLEKIT_NAME			"org.freedesktop.ConsoleKit"
+#define CONSOLEKIT_PATH			"/org/freedesktop/ConsoleKit"
+#define CONSOLEKIT_INTERFACE		"org.freedesktop.ConsoleKit"
+
+#define CONSOLEKIT_MANAGER_PATH	 	"/org/freedesktop/ConsoleKit/Manager"
+#define CONSOLEKIT_MANAGER_INTERFACE    "org.freedesktop.ConsoleKit.Manager"
+#define CONSOLEKIT_SEAT_INTERFACE       "org.freedesktop.ConsoleKit.Seat"
+#define CONSOLEKIT_SESSION_INTERFACE    "org.freedesktop.ConsoleKit.Session"
+
+struct GnomeSettingsSessionPrivate
+{
+	GDBusProxy		*proxy_session;
+	gchar			*session_id;
+	GCancellable		*cancellable;
+	GnomeSettingsSessionState state;
+};
+
+enum {
+	PROP_0,
+	PROP_STATE,
+	PROP_LAST
+};
+
+G_DEFINE_TYPE (GnomeSettingsSession, gnome_settings_session, G_TYPE_OBJECT)
+
+GnomeSettingsSessionState
+gnome_settings_session_get_state (GnomeSettingsSession *session)
+{
+	g_return_val_if_fail (GNOME_IS_SETTINGS_SESSION (session),
+			      GNOME_SETTINGS_SESSION_STATE_UNKNOWN);
+	return session->priv->state;
+}
+
+static void
+gnome_settings_session_set_state (GnomeSettingsSession *session,
+				  gboolean active)
+{
+	session->priv->state = active ? GNOME_SETTINGS_SESSION_STATE_ACTIVE :
+					GNOME_SETTINGS_SESSION_STATE_INACTIVE;
+	g_object_notify (G_OBJECT (session), "state");
+}
+
+static void
+gnome_settings_session_proxy_signal_cb (GDBusProxy *proxy,
+					const gchar *sender_name,
+					const gchar *signal_name,
+					GVariant *parameters,
+					GnomeSettingsSession *session)
+{
+	gboolean active;
+	if (g_strcmp0 (signal_name, "ActiveChanged") == 0) {
+		g_variant_get (parameters, "(b)", &active);
+		g_debug ("emitting active: %i", active);
+		gnome_settings_session_set_state (session, active);
+	}
+}
+
+static void
+gnome_settings_session_get_property (GObject *object,
+				     guint prop_id,
+				     GValue *value,
+				     GParamSpec *pspec)
+{
+	GnomeSettingsSession *session = GNOME_SETTINGS_SESSION (object);
+
+	switch (prop_id) {
+	case PROP_STATE:
+		g_value_set_enum (value, session->priv->state);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+GType
+gnome_settings_session_state_get_type (void)
+{
+	static GType etype = 0;
+	if (etype == 0) {
+		static const GEnumValue values[] = {
+			{ GNOME_SETTINGS_SESSION_STATE_UNKNOWN,
+			  "unknown", "Unknown" },
+			{ GNOME_SETTINGS_SESSION_STATE_ACTIVE,
+			  "active", "Active" },
+			{ GNOME_SETTINGS_SESSION_STATE_INACTIVE,
+			  "inactive", "Inactive" },
+			{ 0, NULL, NULL }
+			};
+		etype = g_enum_register_static ("GnomeSettingsSessionState", values);
+	}
+	return etype;
+}
+
+static void
+gnome_settings_session_class_init (GnomeSettingsSessionClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+	object_class->get_property = gnome_settings_session_get_property;
+	object_class->finalize = gnome_settings_session_finalize;
+	g_type_class_add_private (klass, sizeof (GnomeSettingsSessionPrivate));
+
+	g_object_class_install_property (object_class,
+					 PROP_STATE,
+					 g_param_spec_enum ("state",
+							    "The session state",
+							    NULL,
+							    GNOME_TYPE_SETTINGS_SESSION_STATE,
+							    GNOME_SETTINGS_SESSION_STATE_UNKNOWN,
+							    G_PARAM_READABLE));
+}
+
+static void
+is_active_cb (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+	gboolean active = FALSE;
+	GError *error = NULL;
+	GVariant *result;
+	GnomeSettingsSession *session = GNOME_SETTINGS_SESSION (user_data);
+
+	/* is our session active */
+	result = g_dbus_proxy_call_finish (G_DBUS_PROXY (source_object),
+					   res,
+					   &error);
+	if (result == NULL) {
+		g_warning ("IsActive failed: %s", error->message);
+		g_error_free (error);
+		return;
+	}
+	g_variant_get (result, "(b)", &active);
+	gnome_settings_session_set_state (session, active);
+
+	/* watch for changes */
+	g_signal_connect (session->priv->proxy_session, "g-signal",
+			  G_CALLBACK (gnome_settings_session_proxy_signal_cb),
+			  session);
+
+	g_variant_unref (result);
+}
+
+static void
+got_session_proxy_cb (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+	GError *error = NULL;
+	GnomeSettingsSession *session = GNOME_SETTINGS_SESSION (user_data);
+
+	/* connect to session */
+	session->priv->proxy_session = g_dbus_proxy_new_for_bus_finish (res,
+									&error);
+	if (session->priv->proxy_session == NULL) {
+		g_warning ("cannot connect to %s: %s",
+			   session->priv->session_id,
+			   error->message);
+		g_error_free (error);
+		return;
+	}
+
+	/* is our session active */
+	g_dbus_proxy_call (session->priv->proxy_session,
+			   "IsActive",
+			   NULL,
+			   G_DBUS_CALL_FLAGS_NONE,
+			   -1,
+			   session->priv->cancellable,
+			   is_active_cb,
+			   session);
+}
+
+static void
+got_session_path_cb (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+	GVariant *result;
+	GError *error = NULL;
+	GnomeSettingsSession *session = GNOME_SETTINGS_SESSION (user_data);
+
+	result = g_dbus_proxy_call_finish (G_DBUS_PROXY (source_object),
+					   res,
+					   &error);
+	if (result == NULL) {
+		g_warning ("Failed to get session for pid: %s",
+			   error->message);
+		g_error_free (error);
+		return;
+	}
+
+	g_variant_get (result, "(o)", &session->priv->session_id);
+	g_debug ("ConsoleKit session ID: %s", session->priv->session_id);
+
+	/* connect to session */
+	g_dbus_proxy_new_for_bus (G_BUS_TYPE_SYSTEM,
+				  G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES,
+				  NULL,
+				  CONSOLEKIT_NAME,
+				  session->priv->session_id,
+				  CONSOLEKIT_SESSION_INTERFACE,
+				  session->priv->cancellable,
+				  got_session_proxy_cb,
+				  session);
+	g_variant_unref (result);
+}
+
+static void
+got_manager_proxy_cb (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+	GDBusProxy *proxy_manager;
+	GError *error = NULL;
+	guint32 pid;
+	GnomeSettingsSession *session = GNOME_SETTINGS_SESSION (user_data);
+
+	proxy_manager = g_dbus_proxy_new_for_bus_finish (res, &error);
+	if (proxy_manager == NULL) {
+		g_warning ("cannot connect to ConsoleKit: %s",
+			   error->message);
+		g_error_free (error);
+		return;
+	}
+
+	/* get the session we are running in */
+	pid = getpid ();
+	g_dbus_proxy_call (proxy_manager,
+			   "GetSessionForUnixProcess",
+			   g_variant_new ("(u)", pid),
+			   G_DBUS_CALL_FLAGS_NONE,
+			   -1, session->priv->cancellable,
+			   got_session_path_cb,
+			   session);
+	g_object_unref (proxy_manager);
+}
+
+static void
+gnome_settings_session_init (GnomeSettingsSession *session)
+{
+	session->priv = GNOME_SETTINGS_SESSION_GET_PRIVATE (session);
+	session->priv->cancellable = g_cancellable_new ();
+
+	/* connect to ConsoleKit */
+	g_dbus_proxy_new_for_bus (G_BUS_TYPE_SYSTEM,
+				  G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES,
+				  NULL,
+				  CONSOLEKIT_NAME,
+				  CONSOLEKIT_MANAGER_PATH,
+				  CONSOLEKIT_MANAGER_INTERFACE,
+				  session->priv->cancellable,
+				  got_manager_proxy_cb,
+				  session);
+}
+
+static void
+gnome_settings_session_finalize (GObject *object)
+{
+	GnomeSettingsSession *session;
+
+	g_return_if_fail (GNOME_IS_SETTINGS_SESSION (object));
+
+	session = GNOME_SETTINGS_SESSION (object);
+
+	g_cancellable_cancel (session->priv->cancellable);
+
+	g_return_if_fail (session->priv != NULL);
+	if (session->priv->proxy_session != NULL)
+		g_object_unref (session->priv->proxy_session);
+	g_object_unref (session->priv->cancellable);
+	g_free (session->priv->session_id);
+
+	G_OBJECT_CLASS (gnome_settings_session_parent_class)->finalize (object);
+}
+
+GnomeSettingsSession *
+gnome_settings_session_new (void)
+{
+	GnomeSettingsSession *session;
+	session = g_object_new (GNOME_TYPE_SETTINGS_SESSION, NULL);
+	return GNOME_SETTINGS_SESSION (session);
+}
+
diff --git a/gnome-settings-daemon/gnome-settings-session.h b/gnome-settings-daemon/gnome-settings-session.h
new file mode 100644
index 00000000..874318ba
--- /dev/null
+++ b/gnome-settings-daemon/gnome-settings-session.h
@@ -0,0 +1,64 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2010-2011 Richard Hughes <richard@hughsie.com>
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __GNOME_SETTINGS_SESSION_H
+#define __GNOME_SETTINGS_SESSION_H
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define GNOME_TYPE_SETTINGS_SESSION		(gnome_settings_session_get_type ())
+#define GNOME_SETTINGS_SESSION(o)		(G_TYPE_CHECK_INSTANCE_CAST ((o), GNOME_TYPE_SETTINGS_SESSION, GnomeSettingsSession))
+#define GNOME_SETTINGS_SESSION_CLASS(k)	(G_TYPE_CHECK_CLASS_CAST((k), GNOME_TYPE_SETTINGS_SESSION, GnomeSettingsSessionClass))
+#define GNOME_IS_SETTINGS_SESSION(o)		(G_TYPE_CHECK_INSTANCE_TYPE ((o), GNOME_TYPE_SETTINGS_SESSION))
+#define GNOME_IS_SETTINGS_SESSION_CLASS(k)	(G_TYPE_CHECK_CLASS_TYPE ((k), GNOME_TYPE_SETTINGS_SESSION))
+#define GNOME_SETTINGS_SESSION_GET_CLASS(o)	(G_TYPE_INSTANCE_GET_CLASS ((o), GNOME_TYPE_SETTINGS_SESSION, GnomeSettingsSessionClass))
+#define GNOME_TYPE_SETTINGS_SESSION_STATE	(gnome_settings_session_state_get_type())
+
+typedef struct GnomeSettingsSessionPrivate GnomeSettingsSessionPrivate;
+
+typedef struct
+{
+	 GObject			 parent;
+	 GnomeSettingsSessionPrivate	*priv;
+} GnomeSettingsSession;
+
+typedef struct
+{
+	GObjectClass	parent_class;
+} GnomeSettingsSessionClass;
+
+typedef enum {
+	GNOME_SETTINGS_SESSION_STATE_UNKNOWN,
+	GNOME_SETTINGS_SESSION_STATE_ACTIVE,
+	GNOME_SETTINGS_SESSION_STATE_INACTIVE,
+} GnomeSettingsSessionState;
+
+GType			 gnome_settings_session_get_type	(void);
+GType			 gnome_settings_session_state_get_type	(void);
+GnomeSettingsSession	*gnome_settings_session_new		(void);
+GnomeSettingsSessionState gnome_settings_session_get_state	(GnomeSettingsSession	*session);
+
+G_END_DECLS
+
+#endif /* __GNOME_SETTINGS_SESSION_H */
+