[glib/wip/hadess/power-profile-monitor-portal: 1/4] gio: Add portal version of GPowerProfileMonitor

[Bastien Nocera <hadess src gnome org>]

commit dd0c76a0ea8d3811248e0aff3b97b3573e747beb
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Aug 9 23:19:17 2021 +0200

    gio: Add portal version of GPowerProfileMonitor

 docs/reference/gio/meson.build   |   1 +
 gio/giomodule.c                  |   2 +
 gio/gpowerprofilemonitorportal.c | 182 +++++++++++++++++++++++++++++++++++++++
 gio/gpowerprofilemonitorportal.h |  31 +++++++
 gio/meson.build                  |   1 +
 5 files changed, 217 insertions(+)
---
diff --git a/docs/reference/gio/meson.build b/docs/reference/gio/meson.build
index fbabd25ca..9aaafeed5 100644
--- a/docs/reference/gio/meson.build
+++ b/docs/reference/gio/meson.build
@@ -66,6 +66,7 @@ if get_option('gtk_doc')
     'gpollfilemonitor.h',
     'gportalsupport.h',
     'gpowerprofilemonitordbus.h',
+    'gpowerprofilemonitorportal.h',
     'gproxyresolverportal.h',
     'gregistrysettingsbackend.h',
     'gresourcefile.h',
diff --git a/gio/giomodule.c b/gio/giomodule.c
index dfd895717..1c23eefa4 100644
--- a/gio/giomodule.c
+++ b/gio/giomodule.c
@@ -50,6 +50,7 @@
 #include "gmemorymonitordbus.h"
 #include "gpowerprofilemonitor.h"
 #include "gpowerprofilemonitordbus.h"
+#include "gpowerprofilemonitorportal.h"
 #ifdef G_OS_WIN32
 #include "gregistrysettingsbackend.h"
 #include "giowin32-priv.h"
@@ -1279,6 +1280,7 @@ _g_io_modules_ensure_loaded (void)
       g_type_ensure (g_memory_settings_backend_get_type ());
       g_type_ensure (g_keyfile_settings_backend_get_type ());
       g_type_ensure (g_power_profile_monitor_dbus_get_type ());
+      g_type_ensure (g_power_profile_monitor_portal_get_type ());
 #if defined(HAVE_INOTIFY_INIT1)
       g_type_ensure (g_inotify_file_monitor_get_type ());
 #endif
diff --git a/gio/gpowerprofilemonitorportal.c b/gio/gpowerprofilemonitorportal.c
new file mode 100644
index 000000000..bb1b4fd15
--- /dev/null
+++ b/gio/gpowerprofilemonitorportal.c
@@ -0,0 +1,182 @@
+/* GIO - GLib Input, Output and Streaming Library
+ *
+ * Copyright 2021 Red Hat, Inc.
+ *
+ * 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 "gpowerprofilemonitorportal.h"
+#include "gdbuserror.h"
+#include "gdbusproxy.h"
+#include "ginitable.h"
+#include "gioerror.h"
+#include "giomodule-priv.h"
+#include "gportalsupport.h"
+
+#define G_POWER_PROFILE_MONITOR_PORTAL_GET_INITABLE_IFACE(o) (G_TYPE_INSTANCE_GET_INTERFACE ((o), 
G_TYPE_INITABLE, GInitable))
+
+static void g_power_profile_monitor_portal_iface_init (GPowerProfileMonitorInterface *iface);
+static void g_power_profile_monitor_portal_initable_iface_init (GInitableIface *iface);
+
+typedef enum
+{
+  PROP_POWER_SAVER_ENABLED = 1,
+} GPowerProfileMonitorPortalProperty;
+
+struct _GPowerProfileMonitorPortal
+{
+  GObject parent_instance;
+
+  GDBusProxy *proxy;
+  gulong signal_id;
+  gboolean power_saver_enabled;
+};
+
+G_DEFINE_TYPE_WITH_CODE (GPowerProfileMonitorPortal, g_power_profile_monitor_portal, G_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
+                                                g_power_profile_monitor_portal_initable_iface_init)
+                         G_IMPLEMENT_INTERFACE (G_TYPE_POWER_PROFILE_MONITOR,
+                                                g_power_profile_monitor_portal_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,
+                                                         "portal",
+                                                         40))
+
+static void
+g_power_profile_monitor_portal_init (GPowerProfileMonitorPortal *portal)
+{
+}
+
+static void
+proxy_properties_changed (GDBusProxy *proxy,
+                          GVariant   *changed_properties,
+                          GStrv       invalidated_properties,
+                          gpointer    user_data)
+{
+  GPowerProfileMonitorPortal *ppm = user_data;
+  gboolean power_saver_enabled;
+
+  if (!g_variant_lookup (changed_properties, "power-saver-enabled", "b", &power_saver_enabled))
+    return;
+
+  if (power_saver_enabled == ppm->power_saver_enabled)
+    return;
+
+  ppm->power_saver_enabled = power_saver_enabled;
+  g_object_notify (G_OBJECT (ppm), "power-saver-enabled");
+}
+
+static void
+g_power_profile_monitor_portal_get_property (GObject    *object,
+                                             guint       prop_id,
+                                             GValue     *value,
+                                             GParamSpec *pspec)
+{
+  GPowerProfileMonitorPortal *ppm = G_POWER_PROFILE_MONITOR_PORTAL (object);
+
+  switch ((GPowerProfileMonitorPortalProperty) prop_id)
+    {
+    case PROP_POWER_SAVER_ENABLED:
+      g_value_set_boolean (value, ppm->power_saver_enabled);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static gboolean
+g_power_profile_monitor_portal_initable_init (GInitable     *initable,
+                                              GCancellable  *cancellable,
+                                              GError       **error)
+{
+  GPowerProfileMonitorPortal *ppm = G_POWER_PROFILE_MONITOR_PORTAL (initable);
+  GDBusProxy *proxy;
+  gchar *name_owner;
+
+  if (!glib_should_use_portal ())
+    {
+      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "Not using portals");
+      return FALSE;
+    }
+
+  proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
+                                         G_DBUS_PROXY_FLAGS_NONE,
+                                         NULL,
+                                         "org.freedesktop.portal.Desktop",
+                                         "/org/freedesktop/portal/desktop",
+                                         "org.freedesktop.portal.PowerProfileMonitor",
+                                         cancellable,
+                                         error);
+  if (!proxy)
+    return FALSE;
+
+  name_owner = g_dbus_proxy_get_name_owner (proxy);
+
+  if (name_owner == NULL)
+    {
+      g_object_unref (proxy);
+      g_set_error (error,
+                   G_DBUS_ERROR,
+                   G_DBUS_ERROR_NAME_HAS_NO_OWNER,
+                   "Desktop portal not found");
+      return FALSE;
+    }
+
+  g_free (name_owner);
+
+  ppm->signal_id = g_signal_connect (proxy, "g-properties-changed",
+                                     G_CALLBACK (proxy_properties_changed), ppm);
+
+  ppm->proxy = g_steal_pointer (&proxy);
+
+  return TRUE;
+}
+
+static void
+g_power_profile_monitor_portal_finalize (GObject *object)
+{
+  GPowerProfileMonitorPortal *ppm = G_POWER_PROFILE_MONITOR_PORTAL (object);
+
+  g_clear_signal_handler (&ppm->signal_id, ppm->proxy);
+  g_clear_object (&ppm->proxy);
+
+  G_OBJECT_CLASS (g_power_profile_monitor_portal_parent_class)->finalize (object);
+}
+
+static void
+g_power_profile_monitor_portal_class_init (GPowerProfileMonitorPortalClass *nl_class)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (nl_class);
+
+  gobject_class->get_property = g_power_profile_monitor_portal_get_property;
+  gobject_class->finalize  = g_power_profile_monitor_portal_finalize;
+
+  g_object_class_override_property (gobject_class, PROP_POWER_SAVER_ENABLED, "power-saver-enabled");
+}
+
+static void
+g_power_profile_monitor_portal_iface_init (GPowerProfileMonitorInterface *monitor_iface)
+{
+}
+
+static void
+g_power_profile_monitor_portal_initable_iface_init (GInitableIface *iface)
+{
+  iface->init = g_power_profile_monitor_portal_initable_init;
+}
diff --git a/gio/gpowerprofilemonitorportal.h b/gio/gpowerprofilemonitorportal.h
new file mode 100644
index 000000000..b91a14610
--- /dev/null
+++ b/gio/gpowerprofilemonitorportal.h
@@ -0,0 +1,31 @@
+/* GIO - GLib Input, Output and Streaming Library
+ *
+ * Copyright 2021 Red Hat, Inc.
+ *
+ * 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/>.
+ */
+
+#ifndef __G_POWER_PROFILE_MONITOR_PORTAL_H__
+#define __G_POWER_PROFILE_MONITOR_PORTAL_H__
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define G_TYPE_POWER_PROFILE_MONITOR_PORTAL         (g_power_profile_monitor_portal_get_type ())
+G_DECLARE_FINAL_TYPE (GPowerProfileMonitorPortal, g_power_profile_monitor_portal, G, 
POWER_PROFILE_MONITOR_PORTAL, GObject)
+
+G_END_DECLS
+
+#endif /* __G_POWER_PROFILE_MONITOR_PORTAL_H__ */
diff --git a/gio/meson.build b/gio/meson.build
index d5838ed8a..ac3373f2b 100644
--- a/gio/meson.build
+++ b/gio/meson.build
@@ -383,6 +383,7 @@ if host_system != 'windows'
     'gopenuriportal.c',
     'gmemorymonitorportal.c',
     'gnetworkmonitorportal.c',
+    'gpowerprofilemonitorportal.c',
     'gproxyresolverportal.c',
     'gtrashportal.c',
     'gportalsupport.c',