+static guint64
+count_part_size (const gchar *part)
+{
+ GnomeVFSURI *vfs_uri;
+ gchar *escaped_filename;
+ gchar *filename;
+ GnomeVFSFileInfo *info;
+ guint64 result;
+
+ /* Estimation of attachment size if we cannot get it from file info */
+ result = 32768;
+
+ vfs_uri = gnome_vfs_uri_new (part);
+
+ escaped_filename = g_path_get_basename (gnome_vfs_uri_get_path (vfs_uri));
+ filename = gnome_vfs_unescape_string_for_display (escaped_filename);
+ g_free (escaped_filename);
+ gnome_vfs_uri_unref (vfs_uri);
+
+ info = gnome_vfs_file_info_new ();
+
+ if (gnome_vfs_get_file_info (part,
+ info,
+ GNOME_VFS_FILE_INFO_GET_MIME_TYPE)
+ == GNOME_VFS_OK) {
+ if (info->valid_fields & GNOME_VFS_FILE_INFO_FIELDS_SIZE) {
+ result = info->size;
+ }
+ }
+ g_free (filename);
+ gnome_vfs_file_info_unref (info);
+
+ return result;
+}
+
+static guint64
+count_parts_size (GSList *parts)
+{
+ GSList *node;
+ guint64 result = 0;
+
+ for (node = parts; node != NULL; node = g_slist_next (node)) {
+ result += count_part_size ((const gchar *) node->data);
+ }
+
+ return result;
+}
+