[tracker/external-crawler: 29/31] libtracker-miner: Add TrackerMiner::introspection-xml property

[Martyn James Russell <mr src gnome org>]

commit 74a083db429001c89b27040ab612a6e2a469515c
Author: Martyn Russell <martyn lanedo com>
Date:   Thu Jun 12 21:02:00 2014 +0100

    libtracker-miner: Add TrackerMiner::introspection-xml property
    
    This allows miners to add their own signals and methods with the base signals
    and methods provided by default.

 src/libtracker-miner/tracker-miner-object.c |   34 ++++++++++++++++++++++++--
 1 files changed, 31 insertions(+), 3 deletions(-)
---
diff --git a/src/libtracker-miner/tracker-miner-object.c b/src/libtracker-miner/tracker-miner-object.c
index def83d5..f5d110b 100644
--- a/src/libtracker-miner/tracker-miner-object.c
+++ b/src/libtracker-miner/tracker-miner-object.c
@@ -66,7 +66,7 @@
 #define TRACKER_MINER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), TRACKER_TYPE_MINER, 
TrackerMinerPrivate))
 
 /* Introspection data for the service we are exporting */
-static const gchar introspection_xml[] =
+static const gchar miner_introspection_xml[] =
   "<node>"
   "  <interface name='org.freedesktop.Tracker1.Miner'>"
   "    <method name='Start'>"
@@ -109,6 +109,8 @@ static const gchar introspection_xml[] =
   "      <arg type='d' name='progress' />"
   "      <arg type='i' name='remaining_time' />"
   "    </signal>"
+  "    <!-- Additional introspection data given by other miners -->"
+  "    %s"
   "  </interface>"
   "</node>";
 
@@ -119,6 +121,7 @@ struct _TrackerMinerPrivate {
        gchar *name;
        gchar *status;
        gdouble progress;
+       gchar *introspection_xml;
        gint remaining_time;
        gint availability_cookie;
        GDBusConnection *d_connection;
@@ -143,7 +146,8 @@ enum {
        PROP_NAME,
        PROP_STATUS,
        PROP_PROGRESS,
-       PROP_REMAINING_TIME
+       PROP_REMAINING_TIME,
+       PROP_INTROSPECTION_XML
 };
 
 enum {
@@ -388,6 +392,13 @@ tracker_miner_class_init (TrackerMinerClass *klass)
                                                           G_MAXINT,
                                                           -1,
                                                           G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
+       g_object_class_install_property (object_class,
+                                        PROP_INTROSPECTION_XML,
+                                        g_param_spec_string ("introspection-xml",
+                                                             "Introspection XML",
+                                                             "Introspection XML to *append* to the standard 
miner interface provided",
+                                                             NULL,
+                                                             G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 
        g_type_class_add_private (object_class, sizeof (TrackerMinerPrivate));
 }
@@ -407,6 +418,7 @@ miner_initable_init (GInitable     *initable,
        GError *inner_error = NULL;
        GVariant *reply;
        guint32 rval;
+       gchar *extra_xml, *full_xml;
        GDBusInterfaceVTable interface_vtable = {
                handle_method_call,
                handle_get_property,
@@ -428,7 +440,15 @@ miner_initable_init (GInitable     *initable,
        }
 
        /* Setup introspection data */
-       miner->priv->introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, &inner_error);
+       g_object_get (initable, "introspection-xml", &extra_xml, NULL);
+
+       full_xml = g_strdup_printf (miner_introspection_xml, extra_xml ? extra_xml : "");
+       g_free (extra_xml);
+
+       g_message ("Trying to use introspection XML:\n%s\n", full_xml);
+       miner->priv->introspection_data = g_dbus_node_info_new_for_xml (full_xml, &inner_error);
+       g_free (full_xml);
+
        if (!miner->priv->introspection_data) {
                g_propagate_error (error, inner_error);
                return FALSE;
@@ -684,6 +704,11 @@ miner_set_property (GObject      *object,
                }
                break;
        }
+       case PROP_INTROSPECTION_XML: {
+               /* Only set on constructor */
+               miner->priv->introspection_xml = g_value_dup_string (value);
+               break;
+       }
        default:
                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
                break;
@@ -711,6 +736,9 @@ miner_get_property (GObject    *object,
        case PROP_REMAINING_TIME:
                g_value_set_int (value, miner->priv->remaining_time);
                break;
+       case PROP_INTROSPECTION_XML:
+               g_value_set_string (value, miner->priv->introspection_xml);
+               break;
        default:
                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
                break;