+guint gtkut_text_str_compare_n (GtkText *text,
+ guint pos1,
+ guint pos2,
+ guint len,
+ guint text_len);
+guint gtkut_text_str_compare (GtkText *text,
+ guint start_pos,
+ guint text_len,
+ const gchar *str);
+gboolean gtkut_text_is_uri_string (GtkText *text,
+ guint start_pos,
+ guint text_len);