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[glib/portal] Add a portalized network monitor implementation

commit 2284bb227622638e9027c62deca34c1dfd9667d6
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jun 21 19:55:23 2016 -0400

    Add a portalized network monitor implementation
    
    The backend for this lives in xdg-desktop-portal, and is in turn
    using GNetworkMonitor.

 gio/Makefile.am                               |   22 +++
 gio/giomodule.c                               |    2 +
 gio/gnetworkmonitorportal.c                   |  192 +++++++++++++++++++++++++
 gio/gnetworkmonitorportal.h                   |   53 +++++++
 gio/org.freedesktop.portal.NetworkMonitor.xml |   31 ++++
 5 files changed, 300 insertions(+), 0 deletions(-)
---
diff --git a/gio/Makefile.am b/gio/Makefile.am
index 18e0ca1..72dd8cb 100644
--- a/gio/Makefile.am
+++ b/gio/Makefile.am
@@ -338,6 +338,27 @@ giowin32include_HEADERS = \
 
 endif
 
+xdp_dbus_built_sources = xdp-dbus.c xdp-dbus.h
+BUILT_SOURCES += $(xdp_dbus_built_sources)
+
+EXTRA_DIST += org.freedesktop.portal.NetworkMonitor.xml
+
+$(xdp_dbus_built_sources) : $(srcdir)/org.freedesktop.portal.NetworkMonitor.xml
+       $(AM_V_GEN) UNINSTALLED_GLIB_SRCDIR=$(top_srcdir)               \
+               UNINSTALLED_GLIB_BUILDDIR=$(top_builddir)               \
+               $(PYTHON) $(srcdir)/gdbus-2.0/codegen/gdbus-codegen.in  \
+               --interface-prefix org.freedesktop.portal.              \
+               --c-namespace Xdp                                       \
+               --generate-c-code $(builddir)/xdp-dbus                  \
+               $(srcdir)/org.freedesktop.portal.NetworkMonitor.xml     \
+               $(NULL)
+
+portal_sources = \
+       gnetworkmonitorportal.c         \
+       gnetworkmonitorportal.h         \
+       $(xdp_dbus_built_sources)       \
+       $(NULL)
+
 libgio_2_0_la_SOURCES =                \
        gappinfo.c              \
        gappinfoprivate.h       \
@@ -491,6 +512,7 @@ libgio_2_0_la_SOURCES =             \
        $(settings_sources)     \
        $(gdbus_sources)        \
        $(local_sources)        \
+       $(portal_sources)       \
        $(NULL)
 
 EXTRA_DIST += strinfo.c
diff --git a/gio/giomodule.c b/gio/giomodule.c
index 54471c7..f84e174 100644
--- a/gio/giomodule.c
+++ b/gio/giomodule.c
@@ -905,6 +905,7 @@ extern GType _g_winhttp_vfs_get_type (void);
 extern GType _g_dummy_proxy_resolver_get_type (void);
 extern GType _g_dummy_tls_backend_get_type (void);
 extern GType g_network_monitor_base_get_type (void);
+extern GType g_network_monitor_portal_get_type (void);
 #ifdef HAVE_NETLINK
 extern GType _g_network_monitor_netlink_get_type (void);
 extern GType _g_network_monitor_nm_get_type (void);
@@ -1130,6 +1131,7 @@ _g_io_modules_ensure_loaded (void)
       g_type_ensure (_g_socks5_proxy_get_type ());
       g_type_ensure (_g_dummy_tls_backend_get_type ());
       g_type_ensure (g_network_monitor_base_get_type ());
+      g_type_ensure (g_network_monitor_portal_get_type ());
 #ifdef HAVE_NETLINK
       g_type_ensure (_g_network_monitor_netlink_get_type ());
       g_type_ensure (_g_network_monitor_nm_get_type ());
diff --git a/gio/gnetworkmonitorportal.c b/gio/gnetworkmonitorportal.c
new file mode 100644
index 0000000..2ff68fe
--- /dev/null
+++ b/gio/gnetworkmonitorportal.c
@@ -0,0 +1,192 @@
+/* GIO - GLib Input, Output and Streaming Library
+ *
+ * Copyright 2016 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 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 "gnetworkmonitorportal.h"
+#include "ginitable.h"
+#include "giomodule-priv.h"
+#include "gnetworkmonitor.h"
+#include "xdp-dbus.h"
+
+
+static void g_network_monitor_portal_iface_init (GNetworkMonitorInterface *iface);
+static void g_network_monitor_portal_initable_iface_init (GInitableIface *iface);
+
+enum
+{
+  PROP_0,
+  PROP_NETWORK_AVAILABLE,
+  PROP_NETWORK_METERED,
+  PROP_CONNECTIVITY
+};
+
+struct _GNetworkMonitorPortalPrivate
+{
+  XdpNetworkMonitor *proxy;
+};
+
+G_DEFINE_TYPE_WITH_CODE (GNetworkMonitorPortal, g_network_monitor_portal, G_TYPE_NETWORK_MONITOR_BASE,
+                         G_ADD_PRIVATE (GNetworkMonitorPortal)
+                         G_IMPLEMENT_INTERFACE (G_TYPE_NETWORK_MONITOR,
+                                                g_network_monitor_portal_iface_init)
+                         G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
+                                                g_network_monitor_portal_initable_iface_init)
+                         _g_io_modules_ensure_extension_points_registered ();
+                         g_io_extension_point_implement (G_NETWORK_MONITOR_EXTENSION_POINT_NAME,
+                                                         g_define_type_id,
+                                                         "portal",
+                                                         30))
+
+static void
+g_network_monitor_portal_init (GNetworkMonitorPortal *nm)
+{
+  nm->priv = g_network_monitor_portal_get_instance_private (nm);
+}
+
+static void
+g_network_monitor_portal_get_property (GObject    *object,
+                                       guint       prop_id,
+                                       GValue     *value,
+                                       GParamSpec *pspec)
+{
+  GNetworkMonitorPortal *nm = G_NETWORK_MONITOR_PORTAL (object);
+
+  switch (prop_id)
+    {
+    case PROP_NETWORK_AVAILABLE:
+      g_value_set_boolean (value, xdp_network_monitor_get_available (nm->priv->proxy));
+      break;
+
+    case PROP_NETWORK_METERED:
+      g_value_set_boolean (value, xdp_network_monitor_get_metered (nm->priv->proxy));
+      break;
+
+    case PROP_CONNECTIVITY:
+      g_value_set_enum (value, xdp_network_monitor_get_connectivity (nm->priv->proxy));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+proxy_changed (XdpNetworkMonitor *proxy,
+               gboolean           available,
+               GNetworkMonitor   *monitor)
+{
+  g_signal_emit_by_name (monitor, "network-changed", available);
+}
+
+
+static gboolean
+should_use_portal (void)
+{
+  const char *use_portal;
+  char *path;
+
+  path = g_strdup_printf ("/run/user/%d/flatpak-info", getuid());
+  if (g_file_test (path, G_FILE_TEST_EXISTS))
+    use_portal = "1";
+  else
+    {
+      use_portal = g_getenv ("GTK_USE_PORTAL");
+      if (!use_portal)
+        use_portal = "";
+    }
+  g_free (path);
+
+  return g_str_equal (use_portal, "1");
+}
+
+static gboolean
+g_network_monitor_portal_initable_init (GInitable     *initable,
+                                        GCancellable  *cancellable,
+                                        GError       **error)
+{
+  GNetworkMonitorPortal *nm = G_NETWORK_MONITOR_PORTAL (initable);
+  XdpNetworkMonitor *proxy;
+  gchar *name_owner = NULL;
+
+  if (!should_use_portal ())
+    {
+      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "Not using portals");
+      return FALSE;
+    }
+
+  proxy = xdp_network_monitor_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
+                                         G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START
+                                         | G_DBUS_PROXY_FLAGS_GET_INVALIDATED_PROPERTIES,
+                                         "org.freedesktop.portal.Desktop",
+                                         "/org/freedesktop/portal/desktop",
+                                         cancellable,
+                                         error);
+  if (!proxy)
+    return FALSE;
+
+  name_owner = g_dbus_proxy_get_name_owner (G_DBUS_PROXY (proxy));
+
+  if (!name_owner)
+    {
+      g_object_unref (proxy);
+      return FALSE;
+    }
+
+  g_free (name_owner);
+
+  g_signal_connect (G_OBJECT (proxy), "changed", G_CALLBACK (proxy_changed), nm);
+  nm->priv->proxy = proxy;
+
+  return TRUE;
+}
+
+static void
+g_network_monitor_portal_finalize (GObject *object)
+{
+  GNetworkMonitorPortal *nm = G_NETWORK_MONITOR_PORTAL (object);
+
+  g_clear_object (&nm->priv->proxy);
+
+  G_OBJECT_CLASS (g_network_monitor_portal_parent_class)->finalize (object);
+}
+
+static void
+g_network_monitor_portal_class_init (GNetworkMonitorPortalClass *class)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (class);
+
+  gobject_class->finalize  = g_network_monitor_portal_finalize;
+  gobject_class->get_property = g_network_monitor_portal_get_property;
+
+  g_object_class_override_property (gobject_class, PROP_NETWORK_AVAILABLE, "network-available");
+  g_object_class_override_property (gobject_class, PROP_NETWORK_METERED, "network-metered");
+  g_object_class_override_property (gobject_class, PROP_CONNECTIVITY, "connectivity");
+}
+
+static void
+g_network_monitor_portal_iface_init (GNetworkMonitorInterface *monitor_iface)
+{
+}
+
+static void
+g_network_monitor_portal_initable_iface_init (GInitableIface *iface)
+{
+  iface->init = g_network_monitor_portal_initable_init;
+}
diff --git a/gio/gnetworkmonitorportal.h b/gio/gnetworkmonitorportal.h
new file mode 100644
index 0000000..3d25f57
--- /dev/null
+++ b/gio/gnetworkmonitorportal.h
@@ -0,0 +1,53 @@
+/* GIO - GLib Input, Output and Streaming Library
+ *
+ * Copyright 2016 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 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_NETWORK_MONITOR_PORTAL_H__
+#define __G_NETWORK_MONITOR_PORTAL_H__
+
+#include "gnetworkmonitorbase.h"
+
+G_BEGIN_DECLS
+
+#define G_TYPE_NETWORK_MONITOR_PORTAL         (g_network_monitor_portal_get_type ())
+#define G_NETWORK_MONITOR_PORTAL(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), 
G_TYPE_NETWORK_MONITOR_PORTAL, GNetworkMonitorPortal))
+#define G_NETWORK_MONITOR_PORTAL_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_NETWORK_MONITOR_PORTAL, 
GNetworkMonitorPortalClass))
+#define G_IS_NETWORK_MONITOR_PORTAL(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), 
G_TYPE_NETWORK_MONITOR_PORTAL))
+#define G_IS_NETWORK_MONITOR_PORTAL_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_NETWORK_MONITOR_PORTAL))
+#define G_NETWORK_MONITOR_PORTAL_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), 
G_TYPE_NETWORK_MONITOR_PORTAL, GNetworkMonitorPortalClass))
+#define G_NETWORK_MONITOR_PORTAL_GET_INITABLE_IFACE(o) (G_TYPE_INSTANCE_GET_INTERFACE ((o), G_TYPE_INITABLE, 
GInitable))
+
+
+typedef struct _GNetworkMonitorPortal        GNetworkMonitorPortal;
+typedef struct _GNetworkMonitorPortalClass   GNetworkMonitorPortalClass;
+typedef struct _GNetworkMonitorPortalPrivate GNetworkMonitorPortalPrivate;
+
+struct _GNetworkMonitorPortal {
+  GNetworkMonitorBase parent_instance;
+
+  GNetworkMonitorPortalPrivate *priv;
+};
+
+struct _GNetworkMonitorPortalClass {
+  GNetworkMonitorBaseClass parent_class;
+};
+
+GType g_network_monitor_portal_get_type (void);
+
+G_END_DECLS
+
+#endif /* __G_NETWORK_MONITOR_PORTAL_H__ */
diff --git a/gio/org.freedesktop.portal.NetworkMonitor.xml b/gio/org.freedesktop.portal.NetworkMonitor.xml
new file mode 100644
index 0000000..284b7bd
--- /dev/null
+++ b/gio/org.freedesktop.portal.NetworkMonitor.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0"?>
+<!--
+ Copyright (C) 2016 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 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, write to the
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+
+ Author: Matthias Clasen <mclasen redhat com>
+-->
+<node xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd"; name="/">
+  <interface name="org.freedesktop.portal.NetworkMonitor">
+    <signal name="changed">
+      <arg type="b" name="available"/>
+    </signal>
+    <property name="available" type="b" access="read"/>
+    <property name="metered" type="b" access="read"/>
+    <property name="connectivity" type="u" access="read"/>
+  </interface>
+</node>
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