[gnome-control-center] background: Add function to load a single XML file

[Bastien Nocera <hadess src gnome org>]

commit 66ee58bf52e9822826f1840b4be9a60447b1af26
Author: Bastien Nocera <hadess hadess net>
Date:   Sun Feb 13 02:33:03 2011 +0000

    background: Add function to load a single XML file
    
    And its item out of it. So that we can load a file on startup
    and check whether it corresponds to our configuration.

 panels/background/cc-background-xml.c |   27 +++++++++++++++++++++++++++
 panels/background/cc-background-xml.h |    1 +
 2 files changed, 28 insertions(+), 0 deletions(-)
---
diff --git a/panels/background/cc-background-xml.c b/panels/background/cc-background-xml.c
index 0cb2596..5ba155c 100644
--- a/panels/background/cc-background-xml.c
+++ b/panels/background/cc-background-xml.c
@@ -474,6 +474,33 @@ cc_background_xml_load_xml (CcBackgroundXml *xml,
 	return cc_background_xml_load_xml_internal (xml, filename, FALSE);
 }
 
+static void
+single_xml_added (CcBackgroundXml   *xml,
+		  CcBackgroundItem  *item,
+		  CcBackgroundItem **ret)
+{
+	g_assert (*ret == NULL);
+	*ret = g_object_ref (item);
+}
+
+CcBackgroundItem *
+cc_background_xml_get_item (const char *filename)
+{
+	CcBackgroundXml *xml;
+	CcBackgroundItem *item;
+
+	xml = cc_background_xml_new ();
+	item = NULL;
+	g_signal_connect (G_OBJECT (xml), "added",
+			  G_CALLBACK (single_xml_added), &item);
+	if (cc_background_xml_load_xml (xml, filename) == FALSE) {
+		g_object_unref (xml);
+		return NULL;
+	}
+
+	return item;
+}
+
 #if 0
 static void gnome_wp_list_flatten (const gchar * key, CcBackgroundXml * item,
 				   GSList ** list) {
diff --git a/panels/background/cc-background-xml.h b/panels/background/cc-background-xml.h
index 31da25c..a5e2628 100644
--- a/panels/background/cc-background-xml.h
+++ b/panels/background/cc-background-xml.h
@@ -54,6 +54,7 @@ CcBackgroundXml *cc_background_xml_new (void);
 
 void cc_background_xml_save_list (CcBackgroundXml *data);
 
+CcBackgroundItem *cc_background_xml_get_item         (const char      *filename);
 gboolean cc_background_xml_load_xml                  (CcBackgroundXml *data,
 						      const char      *filename);
 void cc_background_xml_load_list_async               (CcBackgroundXml *data,