usr/src/usr.bin/window/wwclreos.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)wwclreos.c  3.8 (Berkeley) %G%";
#endif /* not lint */

#include "ww.h"
#include "tt.h"

wwclreos(w, row, col)
register struct ww *w;
{
        register i;
        int cleared = 0;

        /*
         * Quick and dirty check for windows that cover the bottom
         * portion of the screen.  Not meant to be complete.
         */
        if (tt.tt_clreos && w->ww_i.b == wwnrow && w->ww_i.l == 0 &&
            w->ww_i.r == wwncol && wwvisible(w)) {
                register j;
                register union ww_char *s;

                i = row;
                (*tt.tt_move)(i, col);
                (*tt.tt_clreos)();
                /*
                 * We have to fix wwos becuase wwclreol1 won't do that.
                 */
                s = &wwos[i][col];
                for (j = wwncol - col; --j >= 0;)
                        s++->c_w = ' ';
                for (i++; i < wwnrow; i++) {
                        s = wwos[i];
                        for (j = wwncol; --j >= 0;)
                                s++->c_w = ' ';
                }
                cleared = 1;
        }
        wwclreol1(w, row, col, cleared);
        for (i = row + 1; i < w->ww_b.b; i++)
                wwclreol1(w, i, w->ww_b.l, cleared);
}