/*      @(#)wwlabel.c   8.1 (Berkeley) 6/6/93   */
/*      $NetBSD: wwlabel.c,v 1.8 2009/04/14 08:50:06 lukem Exp $        */

/*
 * 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. 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.
 */

#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.
 */
void
wwlabel(struct ww *w, struct ww *f, int where, char *l, int mode)
{
        int row;
        int j;
        int jj;
        char *win;
        union ww_char *buf;
        union ww_char *ns;
        char *fmap;
        unsigned char *smap;
        char touched;
        const char *p;

        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)
                for (p = unctrl(*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;
}