usr/src/usr.bin/window/wwlabel.c

/*
 * Copyright (c) 1983 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 are permitted provided
 * that: (1) source distributions retain this entire copyright notice and
 * comment, and (2) distributions including binaries display the following
 * acknowledgement:  ``This product includes software developed by the
 * University of California, Berkeley and its contributors'' in the
 * documentation or other materials provided with the distribution and in
 * all advertising materials mentioning features or use of this software.
 * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)wwlabel.c   3.17 (Berkeley) 6/6/90";
#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;
        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;
}