#define KEY_PRESSED(k) \
    (inst->keystate[(k) / 32] & (1 << ((k) % 32)))

gint key_event(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
    struct gui_data *inst = (struct gui_data *)data;
    char output[256];
    wchar_t ucsoutput[2];
    int ucsval, start, end, special, output_charset, use_ucsoutput;

    /* Remember the timestamp. */
    inst->input_event_time = event->time;

    /* By default, nothing is generated. */
    end = start = 0;
    special = use_ucsoutput = FALSE;
    output_charset = CS_ISO8859_1;

    /*
     * If Alt is being released after typing an Alt+numberpad
     * sequence, we should generate the code that was typed.
     * 
     * Note that we only do this if more than one key was actually
     * pressed - I don't think Alt+NumPad4 should be ^D or that
     * Alt+NumPad3 should be ^C, for example. There's no serious
     * inconvenience in having to type a zero before a single-digit
     * character code.
     */
    if (event->type == GDK_KEY_RELEASE &&
	(event->keyval == GDK_Meta_L || event->keyval == GDK_Alt_L ||
	 event->keyval == GDK_Meta_R || event->keyval == GDK_Alt_R) &&
	inst->alt_keycode >= 0 && inst->alt_digits > 1) {
#ifdef KEY_DEBUGGING
	printf("Alt key up, keycode = %d\n", inst->alt_keycode);
#endif
	/*
	 * FIXME: we might usefully try to do something clever here
	 * about interpreting the generated key code in a way that's
	 * appropriate to the line code page.
	 */
	output[0] = inst->alt_keycode;
	end = 1;
	goto done;
    }

    if (event->type == GDK_KEY_PRESS) {
#ifdef KEY_DEBUGGING

	}

	special = FALSE;
	use_ucsoutput = FALSE;

	/* ALT+things gives leading Escape. */
	output[0] = '\033';
#if !GTK_CHECK_VERSION(2,0,0)
	/*
	 * In vanilla X, and hence also GDK 1.2, the string received
	 * as part of a keyboard event is assumed to be in
	 * ISO-8859-1. (Seems woefully shortsighted in i18n terms,
	 * but it's true: see the man page for XLookupString(3) for
	 * confirmation.)
	 */
	output_charset = CS_ISO8859_1;
	strncpy(output+1, event->string, lenof(output)-1);
#else
	/*
	 * GDK 2.0 arranges to have done some translation for us: in
	 * GDK 2.0, event->string is encoded in the current locale.
	 *
	 * (However, it's also deprecated; we really ought to be
	 * using a GTKIMContext.)
	 *
	 * So we use the standard C library function mbstowcs() to
	 * convert from the current locale into Unicode; from there
	 * we can convert to whatever PuTTY is currently working in.
	 * (In fact I convert straight back to UTF-8 from
	 * wide-character Unicode, for the sake of simplicity: that
	 * way we can still use exactly the same code to manipulate
	 * the string, such as prefixing ESC.)
	 */
	output_charset = CS_UTF8;
	{
	    wchar_t widedata[32], *wp;
	    int wlen;
	    int ulen;

	    wlen = mb_to_wc(DEFAULT_CODEPAGE, 0,
			    event->string, strlen(event->string),
			    widedata, lenof(widedata)-1);

	    wp = widedata;
	    ulen = charset_from_unicode(&wp, &wlen, output+1, lenof(output)-2,
					CS_UTF8, NULL, NULL, 0);
	    output[1+ulen] = '\0';
	}
#endif

	if (!output[1] &&
	    (ucsval = keysym_to_unicode(event->keyval)) >= 0) {
	    ucsoutput[0] = '\033';
	    ucsoutput[1] = ucsval;
	    use_ucsoutput = TRUE;
	    end = 2;
	} else {
	    output[lenof(output)-1] = '\0';
	    end = strlen(output);
	}
	if (event->state & GDK_MOD1_MASK) {
	    start = 0;
	    if (end == 1) end = 0;
	} else
	    start = 1;

	/* Control-` is the same as Control-\ (unless gtk has a better idea) */
	if (!output[1] && event->keyval == '`' &&
	    (event->state & GDK_CONTROL_MASK)) {
	    output[1] = '\x1C';
	    use_ucsoutput = FALSE;
	    end = 2;
	}

	/* Control-Break sends a Break special to the backend */

	    output[1] = '\015';
	    use_ucsoutput = FALSE;
	    end = 2;
	    special = TRUE;
	}

	/* Control-2, Control-Space and Control-@ are NUL */
	if (!output[1] &&
	    (event->keyval == ' ' || event->keyval == '2' ||
	     event->keyval == '@') &&
	    (event->state & (GDK_SHIFT_MASK |
			     GDK_CONTROL_MASK)) == GDK_CONTROL_MASK) {
	    output[1] = '\0';
	    use_ucsoutput = FALSE;
	    end = 2;
	}

	/* Control-Shift-Space is 160 (ISO8859 nonbreaking space) */
	if (!output[1] && event->keyval == ' ' &&
	    (event->state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK)) ==
	    (GDK_SHIFT_MASK | GDK_CONTROL_MASK)) {
	    output[1] = '\240';
	    output_charset = CS_ISO8859_1;
	    use_ucsoutput = FALSE;
	    end = 2;
	}

	/* We don't let GTK tell us what Backspace is! We know better. */
	if (event->keyval == GDK_BackSpace &&
	    !(event->state & GDK_SHIFT_MASK)) {

	     * should never matter.
	     */
	    output[end] = '\0';	       /* NUL-terminate */
	    if (inst->ldisc)
		ldisc_send(inst->ldisc, output+start, -2, 1);
	} else if (!inst->direct_to_font) {
	    if (!use_ucsoutput) {












		if (inst->ldisc)
		    lpage_send(inst->ldisc, output_charset, output+start,
			       end-start, 1);
	    } else {
		/*
		 * We generated our own Unicode key data from the
		 * keysym, so use that instead.
		 */
		if (inst->ldisc)