GApplication: implement fd.o application spec

The freedesktop application specification is largely overlapping the
GLib application D-Bus interface but implementing it will allow for
applications to be launched directly from desktop files, which we want.

We keep the old Gtk interface for compatibility reasons and because it
has some functionality not in the freedesktop spec (Busy state,
CommandLine, etc.).

https://bugzilla.gnome.org/show_bug.cgi?id=699259

1 files changed, 76 insertions, 2 deletions

diff --git a/gio/gapplicationimpl-dbus.c b/gio/gapplicationimpl-dbus.c
index 654fc3186..d4cdb3b5a 100644
--- a/gio/gapplicationimpl-dbus.c
+++ b/gio/gapplicationimpl-dbus.c
@@ -73,6 +73,26 @@ static const gchar org_gtk_Application_xml[] =
 
 static GDBusInterfaceInfo *org_gtk_Application;
 
+static const gchar org_freedesktop_Application_xml[] =
+  "<node>"
+    "<interface name='org.freedesktop.Application'>"
+      "<method name='Activate'>"
+        "<arg type='a{sv}' name='platform-data' direction='in'/>"
+      "</method>"
+      "<method name='Open'>"
+        "<arg type='as' name='uris' direction='in'/>"
+        "<arg type='a{sv}' name='platform-data' direction='in'/>"
+      "</method>"
+      "<method name='ActivateAction'>"
+        "<arg type='s' name='action-name' direction='in'/>"
+        "<arg type='av' name='parameter' direction='in'/>"
+        "<arg type='a{sv}' name='platform-data' direction='in'/>"
+      "</method>"
+    "</interface>"
+  "</node>";
+
+static GDBusInterfaceInfo *org_freedesktop_Application;
+
 static const gchar org_gtk_private_CommandLine_xml[] =
   "<node>"
     "<interface name='org.gtk.private.CommandLine'>"
@@ -96,6 +116,7 @@ struct _GApplicationImpl
 
   gchar           *object_path;
   guint            object_id;
+  guint            fdo_object_id;
   guint            actions_id;
 
   gboolean         properties_live;
@@ -168,7 +189,10 @@ g_application_impl_method_call (GDBusConnection       *connection,
     {
       GVariant *platform_data;
 
+      /* Completely the same for both freedesktop and gtk interfaces */
+
       g_variant_get (parameters, "(@a{sv})", &platform_data);
+
       class->before_emit (impl->app, platform_data);
       g_signal_emit_by_name (impl->app, "activate");
       class->after_emit (impl->app, platform_data);
@@ -185,8 +209,14 @@ g_application_impl_method_call (GDBusConnection       *connection,
       GFile **files;
       gint n, i;
 
-      g_variant_get (parameters, "(@as&s@a{sv})",
-                     &array, &hint, &platform_data);
+      /* freedesktop interface has no hint parameter */
+      if (g_str_equal (interface_name, "org.freedesktop.Application"))
+        {
+          g_variant_get (parameters, "(@as@a{sv})", &array, &platform_data);
+          hint = "";
+        }
+      else
+        g_variant_get (parameters, "(@as&s@a{sv})", &array, &hint, &platform_data);
 
       n = g_variant_n_children (array);
       files = g_new (GFile *, n + 1);
@@ -220,6 +250,8 @@ g_application_impl_method_call (GDBusConnection       *connection,
       GVariant *platform_data;
       int status;
 
+      /* Only on the GtkApplication interface */
+
       cmdline = g_dbus_command_line_new (invocation);
       platform_data = g_variant_get_child_value (parameters, 2);
       class->before_emit (impl->app, platform_data);
@@ -229,6 +261,28 @@ g_application_impl_method_call (GDBusConnection       *connection,
       g_variant_unref (platform_data);
       g_object_unref (cmdline);
     }
+  else if (g_str_equal (method_name, "ActivateAction"))
+    {
+      GVariant *parameter = NULL;
+      GVariant *platform_data;
+      GVariantIter *iter;
+      const gchar *name;
+
+      /* Only on the freedesktop interface */
+
+      g_variant_get (parameters, "(&sav@a{sv})", &name, &iter, &platform_data);
+      g_variant_iter_next (iter, "v", &parameter);
+      g_variant_iter_free (iter);
+
+      class->before_emit (impl->app, platform_data);
+      g_action_group_activate_action (impl->exported_actions, name, parameter);
+      class->after_emit (impl->app, platform_data);
+
+      if (parameter)
+        g_variant_unref (parameter);
+
+      g_variant_unref (platform_data);
+    }
   else
     g_assert_not_reached ();
 }
@@ -290,6 +344,14 @@ g_application_impl_attempt_primary (GApplicationImpl  *impl,
       g_assert (org_gtk_Application != NULL);
       g_dbus_interface_info_ref (org_gtk_Application);
       g_dbus_node_info_unref (info);
+
+      info = g_dbus_node_info_new_for_xml (org_freedesktop_Application_xml, &error);
+      if G_UNLIKELY (info == NULL)
+        g_error ("%s", error->message);
+      org_freedesktop_Application = g_dbus_node_info_lookup_interface (info, "org.freedesktop.Application");
+      g_assert (org_freedesktop_Application != NULL);
+      g_dbus_interface_info_ref (org_freedesktop_Application);
+      g_dbus_node_info_unref (info);
     }
 
   /* We could possibly have been D-Bus activated as a result of incoming
@@ -312,6 +374,12 @@ g_application_impl_attempt_primary (GApplicationImpl  *impl,
   if (impl->object_id == 0)
     return FALSE;
 
+  impl->fdo_object_id = g_dbus_connection_register_object (impl->session_bus, impl->object_path,
+                                                           org_freedesktop_Application, &vtable, impl, NULL, error);
+
+  if (impl->fdo_object_id == 0)
+    return FALSE;
+
   impl->actions_id = g_dbus_connection_export_action_group (impl->session_bus, impl->object_path,
                                                             impl->exported_actions, error);
 
@@ -380,6 +448,12 @@ g_application_impl_stop_primary (GApplicationImpl *impl)
       impl->object_id = 0;
     }
 
+  if (impl->fdo_object_id)
+    {
+      g_dbus_connection_unregister_object (impl->session_bus, impl->fdo_object_id);
+      impl->fdo_object_id = 0;
+    }
+
   if (impl->actions_id)
     {
       g_dbus_connection_unexport_action_group (impl->session_bus, impl->actions_id);