/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)wwlabel.c	8.1 (Berkeley) 6/6/93";
#endif /* not lint */

#include "ww.h"
#include "char.h"

/*
 * Label window w on f,
 * at 1 line above w and 'where' columns from it's left edge.
 * Gross, but it works.
 */
wwlabel(w, f, where, l, mode)
struct ww *w;
struct ww *f;
char *l;
{
	int row;
	register j;
	int jj;
	register char *win;
	register union ww_char *buf;
	register union ww_char *ns;
	register char *fmap;
	register char *smap;
	char touched;
	unsigned char *p;
	static unsigned char cbuf[2];

	if (f->ww_fmap == 0)
		return;

	row = w->ww_w.t - 1;
	if (row < f->ww_i.t || row >= f->ww_i.b)
		return;
	win = f->ww_win[row];
	buf = f->ww_buf[row];
	fmap = f->ww_fmap[row];
	ns = wwns[row];
	smap = wwsmap[row];
	touched = wwtouched[row];
	mode <<= WWC_MSHIFT;

	jj = MIN(w->ww_i.r, f->ww_i.r);
	j = w->ww_i.l + where;
	while (j < jj && *l) {
		if (isctrl(*l))
			p = unctrl(*l);
		else {
			cbuf[0] = *l;
			p = cbuf;
		}
		for (l++; j < jj && *p; j++, p++) {
			/* can't label if not already framed */
			if (win[j] & WWM_GLS)
				continue;
			if (smap[j] != f->ww_index)
				buf[j].c_w = mode | *p;
			else {
				ns[j].c_w = (buf[j].c_w = mode | *p)
						^ win[j] << WWC_MSHIFT;
				touched |= WWU_TOUCHED;
			}
			fmap[j] |= WWF_LABEL;
		}
	}
	wwtouched[row] = touched;
}
