g_signal_handler_block(textview, win->shutdown_keypress_handler);
win->insert_text_handler = g_signal_connect_after( textbuffer, "insert-text", G_CALLBACK(after_window_insert_text), win );
g_signal_handler_block(textbuffer, win->insert_text_handler);
g_signal_handler_block(textview, win->shutdown_keypress_handler);
win->insert_text_handler = g_signal_connect_after( textbuffer, "insert-text", G_CALLBACK(after_window_insert_text), win );
g_signal_handler_block(textbuffer, win->insert_text_handler);