def _close(self):
if self.io.filename:
self.update_recent_files_list(new_file=self.io.filename)
WindowList.unregister_callback(self.postwindowsmenu)
self.unload_extensions()
self.io.close()
self.io = None
self.undo = None
if self.color:
self.color.close(False)
self.color = None
self.text = None
self.tkinter_vars = None
self.per.close()
self.per = None
self.top.destroy()
if self.close_hook:
self.close_hook()
return
