gio/gpowerprofilemonitordbus.c - third_party/glib - Git at Google

 /* GIO - GLib Input, Output and Streaming Library
  *
  * Copyright 2019 Red Hat, Inc.
  * Copyrgith 2021 Igalia S.L.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General
  * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */

 #include "config.h"

 #include "gpowerprofilemonitor.h"
 #include "gpowerprofilemonitordbus.h"
 #include "gioerror.h"
 #include "ginitable.h"
 #include "giomodule-priv.h"
 #include "glibintl.h"
 #include "glib/gstdio.h"
 #include "gcancellable.h"
 #include "gdbusproxy.h"
 #include "gdbusnamewatching.h"

 #define G_POWER_PROFILE_MONITOR_DBUS_GET_INITABLE_IFACE(o) (G_TYPE_INSTANCE_GET_INTERFACE ((o), G_TYPE_INITABLE, GInitable))

 static void g_power_profile_monitor_dbus_iface_init (GPowerProfileMonitorInterface *iface);
 static void g_power_profile_monitor_dbus_initable_iface_init (GInitableIface *iface);

 struct _GPowerProfileMonitorDBus
 {
   GObject parent_instance;

   guint watch_id;
   GCancellable *cancellable;
   GDBusProxy *proxy;
   gulong signal_id;

   gboolean power_saver_enabled;
 };

 typedef enum
 {
   PROP_POWER_SAVER_ENABLED = 1,
 } GPowerProfileMonitorDBusProperty;

 #define POWERPROFILES_DBUS_NAME "net.hadess.PowerProfiles"
 #define POWERPROFILES_DBUS_IFACE "net.hadess.PowerProfiles"
 #define POWERPROFILES_DBUS_PATH "/net/hadess/PowerProfiles"

 G_DEFINE_TYPE_WITH_CODE (GPowerProfileMonitorDBus, g_power_profile_monitor_dbus, G_TYPE_OBJECT,
                          G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
                                                 g_power_profile_monitor_dbus_initable_iface_init)
                          G_IMPLEMENT_INTERFACE (G_TYPE_POWER_PROFILE_MONITOR,
                                                 g_power_profile_monitor_dbus_iface_init)
                          _g_io_modules_ensure_extension_points_registered ();
                          g_io_extension_point_implement (G_POWER_PROFILE_MONITOR_EXTENSION_POINT_NAME,
                                                          g_define_type_id,
                                                          "dbus",
                                                          30))

 static void
 g_power_profile_monitor_dbus_init (GPowerProfileMonitorDBus *dbus)
 {
   dbus->power_saver_enabled = FALSE;
 }

 static void
 ppd_properties_changed_cb (GDBusProxy *proxy,
                            GVariant   *changed_properties,
                            GStrv      *invalidated_properties,
                            gpointer    user_data)
 {
   GPowerProfileMonitorDBus *dbus = user_data;
   const char *active_profile;
   gboolean enabled;

   if (!g_variant_lookup (changed_properties, "ActiveProfile", "&s", &active_profile))
     return;

   enabled = g_strcmp0 (active_profile, "power-saver") == 0;
   if (enabled == dbus->power_saver_enabled)
     return;

   dbus->power_saver_enabled = enabled;
   g_object_notify (G_OBJECT (dbus), "power-saver-enabled");
 }

 static void
 ppd_proxy_cb (GObject      *source_object,
               GAsyncResult *res,
               gpointer      user_data)
 {
   GPowerProfileMonitorDBus *dbus = user_data;
   GVariant *active_profile_variant;
   GDBusProxy *proxy;
   GError *error = NULL;
   const char *active_profile;
   gboolean power_saver_enabled;

   proxy = g_dbus_proxy_new_finish (res, &error);
   if (!proxy)
     {
       g_debug ("GPowerProfileMonitorDBus: Failed to create PowerProfiles D-Bus proxy: %s",
                error->message);
       g_error_free (error);
       return;
     }

   active_profile_variant = g_dbus_proxy_get_cached_property (proxy, "ActiveProfile");
   if (active_profile_variant != NULL &&
       g_variant_is_of_type (active_profile_variant, G_VARIANT_TYPE_STRING))
     {
       active_profile = g_variant_get_string (active_profile_variant, NULL);
       power_saver_enabled = g_strcmp0 (active_profile, "power-saver") == 0;
       if (power_saver_enabled != dbus->power_saver_enabled)
         {
           dbus->power_saver_enabled = power_saver_enabled;
           g_object_notify (G_OBJECT (dbus), "power-saver-enabled");
         }
     }
   g_clear_pointer (&active_profile_variant, g_variant_unref);

   dbus->signal_id = g_signal_connect (G_OBJECT (proxy), "g-properties-changed",
                                       G_CALLBACK (ppd_properties_changed_cb), dbus);
   dbus->proxy = g_steal_pointer (&proxy);
 }

 static void
 ppd_appeared_cb (GDBusConnection *connection,
                  const gchar     *name,
                  const gchar     *name_owner,
                  gpointer         user_data)
 {
   GPowerProfileMonitorDBus *dbus = user_data;

   g_dbus_proxy_new (connection,
                     G_DBUS_PROXY_FLAGS_NONE,
                     NULL,
                     POWERPROFILES_DBUS_NAME,
                     POWERPROFILES_DBUS_PATH,
                     POWERPROFILES_DBUS_IFACE,
                     dbus->cancellable,
                     ppd_proxy_cb,
                     dbus);
 }

 static void
 ppd_vanished_cb (GDBusConnection *connection,
                  const gchar     *name,
                  gpointer         user_data)
 {
   GPowerProfileMonitorDBus *dbus = user_data;

   g_clear_signal_handler (&dbus->signal_id, dbus->proxy);
   g_clear_object (&dbus->proxy);

   dbus->power_saver_enabled = FALSE;
   g_object_notify (G_OBJECT (dbus), "power-saver-enabled");
 }

 static void
 g_power_profile_monitor_dbus_get_property (GObject    *object,
                                            guint       prop_id,
                                            GValue     *value,
                                            GParamSpec *pspec)
 {
   GPowerProfileMonitorDBus *dbus = G_POWER_PROFILE_MONITOR_DBUS (object);

   switch ((GPowerProfileMonitorDBusProperty) prop_id)
     {
     case PROP_POWER_SAVER_ENABLED:
       g_value_set_boolean (value, dbus->power_saver_enabled);
       break;

     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
     }
 }

 static gboolean
 g_power_profile_monitor_dbus_initable_init (GInitable     *initable,
                                             GCancellable  *cancellable,
                                             GError       **error)
 {
   GPowerProfileMonitorDBus *dbus = G_POWER_PROFILE_MONITOR_DBUS (initable);

   dbus->cancellable = g_cancellable_new ();
   dbus->watch_id = g_bus_watch_name (G_BUS_TYPE_SYSTEM,
                                      POWERPROFILES_DBUS_NAME,
                                      G_BUS_NAME_WATCHER_FLAGS_AUTO_START,
                                      ppd_appeared_cb,
                                      ppd_vanished_cb,
                                      dbus,
                                      NULL);

   return TRUE;
 }

 static void
 g_power_profile_monitor_dbus_finalize (GObject *object)
 {
   GPowerProfileMonitorDBus *dbus = G_POWER_PROFILE_MONITOR_DBUS (object);

   g_cancellable_cancel (dbus->cancellable);
   g_clear_object (&dbus->cancellable);
   g_clear_signal_handler (&dbus->signal_id, dbus->proxy);
   g_clear_object (&dbus->proxy);
   g_clear_handle_id (&dbus->watch_id, g_bus_unwatch_name);

   G_OBJECT_CLASS (g_power_profile_monitor_dbus_parent_class)->finalize (object);
 }

 static void
 g_power_profile_monitor_dbus_class_init (GPowerProfileMonitorDBusClass *nl_class)
 {
   GObjectClass *gobject_class = G_OBJECT_CLASS (nl_class);

   gobject_class->get_property = g_power_profile_monitor_dbus_get_property;
   gobject_class->finalize = g_power_profile_monitor_dbus_finalize;

   g_object_class_override_property (gobject_class, PROP_POWER_SAVER_ENABLED, "power-saver-enabled");
 }

 static void
 g_power_profile_monitor_dbus_iface_init (GPowerProfileMonitorInterface *monitor_iface)
 {
 }

 static void
 g_power_profile_monitor_dbus_initable_iface_init (GInitableIface *iface)
 {
   iface->init = g_power_profile_monitor_dbus_initable_init;
 }
	/* GIO - GLib Input, Output and Streaming Library
	*
	* Copyright 2019 Red Hat, Inc.
	* Copyrgith 2021 Igalia S.L.
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* This library 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
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General
	* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
	*/

	#include "config.h"

	#include "gpowerprofilemonitor.h"
	#include "gpowerprofilemonitordbus.h"
	#include "gioerror.h"
	#include "ginitable.h"
	#include "giomodule-priv.h"
	#include "glibintl.h"
	#include "glib/gstdio.h"
	#include "gcancellable.h"
	#include "gdbusproxy.h"
	#include "gdbusnamewatching.h"

	#define G_POWER_PROFILE_MONITOR_DBUS_GET_INITABLE_IFACE(o) (G_TYPE_INSTANCE_GET_INTERFACE ((o), G_TYPE_INITABLE, GInitable))

	static void g_power_profile_monitor_dbus_iface_init (GPowerProfileMonitorInterface *iface);
	static void g_power_profile_monitor_dbus_initable_iface_init (GInitableIface *iface);

	struct _GPowerProfileMonitorDBus
	{
	GObject parent_instance;

	guint watch_id;
	GCancellable *cancellable;
	GDBusProxy *proxy;
	gulong signal_id;

	gboolean power_saver_enabled;
	};

	typedef enum
	{
	PROP_POWER_SAVER_ENABLED = 1,
	} GPowerProfileMonitorDBusProperty;

	#define POWERPROFILES_DBUS_NAME "net.hadess.PowerProfiles"
	#define POWERPROFILES_DBUS_IFACE "net.hadess.PowerProfiles"
	#define POWERPROFILES_DBUS_PATH "/net/hadess/PowerProfiles"

	G_DEFINE_TYPE_WITH_CODE (GPowerProfileMonitorDBus, g_power_profile_monitor_dbus, G_TYPE_OBJECT,
	G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
	g_power_profile_monitor_dbus_initable_iface_init)
	G_IMPLEMENT_INTERFACE (G_TYPE_POWER_PROFILE_MONITOR,
	g_power_profile_monitor_dbus_iface_init)
	_g_io_modules_ensure_extension_points_registered ();
	g_io_extension_point_implement (G_POWER_PROFILE_MONITOR_EXTENSION_POINT_NAME,
	g_define_type_id,
	"dbus",
	30))

	static void
	g_power_profile_monitor_dbus_init (GPowerProfileMonitorDBus *dbus)
	{
	dbus->power_saver_enabled = FALSE;
	}

	static void
	ppd_properties_changed_cb (GDBusProxy *proxy,
	GVariant *changed_properties,
	GStrv *invalidated_properties,
	gpointer user_data)
	{
	GPowerProfileMonitorDBus *dbus = user_data;
	const char *active_profile;
	gboolean enabled;

	if (!g_variant_lookup (changed_properties, "ActiveProfile", "&s", &active_profile))
	return;

	enabled = g_strcmp0 (active_profile, "power-saver") == 0;
	if (enabled == dbus->power_saver_enabled)
	return;

	dbus->power_saver_enabled = enabled;
	g_object_notify (G_OBJECT (dbus), "power-saver-enabled");
	}

	static void
	ppd_proxy_cb (GObject *source_object,
	GAsyncResult *res,
	gpointer user_data)
	{
	GPowerProfileMonitorDBus *dbus = user_data;
	GVariant *active_profile_variant;
	GDBusProxy *proxy;
	GError *error = NULL;
	const char *active_profile;
	gboolean power_saver_enabled;

	proxy = g_dbus_proxy_new_finish (res, &error);
	if (!proxy)
	{
	g_debug ("GPowerProfileMonitorDBus: Failed to create PowerProfiles D-Bus proxy: %s",
	error->message);
	g_error_free (error);
	return;
	}

	active_profile_variant = g_dbus_proxy_get_cached_property (proxy, "ActiveProfile");
	if (active_profile_variant != NULL &&
	g_variant_is_of_type (active_profile_variant, G_VARIANT_TYPE_STRING))
	{
	active_profile = g_variant_get_string (active_profile_variant, NULL);
	power_saver_enabled = g_strcmp0 (active_profile, "power-saver") == 0;
	if (power_saver_enabled != dbus->power_saver_enabled)
	{
	dbus->power_saver_enabled = power_saver_enabled;
	g_object_notify (G_OBJECT (dbus), "power-saver-enabled");
	}
	}
	g_clear_pointer (&active_profile_variant, g_variant_unref);

	dbus->signal_id = g_signal_connect (G_OBJECT (proxy), "g-properties-changed",
	G_CALLBACK (ppd_properties_changed_cb), dbus);
	dbus->proxy = g_steal_pointer (&proxy);
	}

	static void
	ppd_appeared_cb (GDBusConnection *connection,
	const gchar *name,
	const gchar *name_owner,
	gpointer user_data)
	{
	GPowerProfileMonitorDBus *dbus = user_data;

	g_dbus_proxy_new (connection,
	G_DBUS_PROXY_FLAGS_NONE,
	NULL,
	POWERPROFILES_DBUS_NAME,
	POWERPROFILES_DBUS_PATH,
	POWERPROFILES_DBUS_IFACE,
	dbus->cancellable,
	ppd_proxy_cb,
	dbus);
	}

	static void
	ppd_vanished_cb (GDBusConnection *connection,
	const gchar *name,
	gpointer user_data)
	{
	GPowerProfileMonitorDBus *dbus = user_data;

	g_clear_signal_handler (&dbus->signal_id, dbus->proxy);
	g_clear_object (&dbus->proxy);

	dbus->power_saver_enabled = FALSE;
	g_object_notify (G_OBJECT (dbus), "power-saver-enabled");
	}

	static void
	g_power_profile_monitor_dbus_get_property (GObject *object,
	guint prop_id,
	GValue *value,
	GParamSpec *pspec)
	{
	GPowerProfileMonitorDBus *dbus = G_POWER_PROFILE_MONITOR_DBUS (object);

	switch ((GPowerProfileMonitorDBusProperty) prop_id)
	{
	case PROP_POWER_SAVER_ENABLED:
	g_value_set_boolean (value, dbus->power_saver_enabled);
	break;

	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	}
	}

	static gboolean
	g_power_profile_monitor_dbus_initable_init (GInitable *initable,
	GCancellable *cancellable,
	GError **error)
	{
	GPowerProfileMonitorDBus *dbus = G_POWER_PROFILE_MONITOR_DBUS (initable);

	dbus->cancellable = g_cancellable_new ();
	dbus->watch_id = g_bus_watch_name (G_BUS_TYPE_SYSTEM,
	POWERPROFILES_DBUS_NAME,
	G_BUS_NAME_WATCHER_FLAGS_AUTO_START,
	ppd_appeared_cb,
	ppd_vanished_cb,
	dbus,
	NULL);

	return TRUE;
	}

	static void
	g_power_profile_monitor_dbus_finalize (GObject *object)
	{
	GPowerProfileMonitorDBus *dbus = G_POWER_PROFILE_MONITOR_DBUS (object);

	g_cancellable_cancel (dbus->cancellable);
	g_clear_object (&dbus->cancellable);
	g_clear_signal_handler (&dbus->signal_id, dbus->proxy);
	g_clear_object (&dbus->proxy);
	g_clear_handle_id (&dbus->watch_id, g_bus_unwatch_name);

	G_OBJECT_CLASS (g_power_profile_monitor_dbus_parent_class)->finalize (object);
	}

	static void
	g_power_profile_monitor_dbus_class_init (GPowerProfileMonitorDBusClass *nl_class)
	{
	GObjectClass *gobject_class = G_OBJECT_CLASS (nl_class);

	gobject_class->get_property = g_power_profile_monitor_dbus_get_property;
	gobject_class->finalize = g_power_profile_monitor_dbus_finalize;

	g_object_class_override_property (gobject_class, PROP_POWER_SAVER_ENABLED, "power-saver-enabled");
	}

	static void
	g_power_profile_monitor_dbus_iface_init (GPowerProfileMonitorInterface *monitor_iface)
	{
	}

	static void
	g_power_profile_monitor_dbus_initable_iface_init (GInitableIface *iface)
	{
	iface->init = g_power_profile_monitor_dbus_initable_init;
	}