90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/*
|
|
* 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[] = "@(#)wwinsline.c 8.1 (Berkeley) 6/6/93";
|
|
static char rcsid[] = "@(#)$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include "ww.h"
|
|
|
|
wwinsline(w, row)
|
|
register struct ww *w;
|
|
int row;
|
|
{
|
|
register i;
|
|
register union ww_char **cpp, **cqq;
|
|
register union ww_char *cp;
|
|
int row1, row2;
|
|
char deleted;
|
|
int visible;
|
|
|
|
/*
|
|
* Scroll first.
|
|
*/
|
|
if ((row1 = row) < w->ww_i.t) {
|
|
row1 = w->ww_i.t;
|
|
visible = 0;
|
|
} else
|
|
visible = 1;
|
|
if ((row2 = w->ww_b.b) > w->ww_i.b) {
|
|
row2 = w->ww_i.b;
|
|
}
|
|
deleted = wwscroll1(w, row1, row2, -1, visible);
|
|
|
|
/*
|
|
* Fix the buffer.
|
|
* But leave clearing the last line for wwclreol().
|
|
*/
|
|
cpp = &w->ww_buf[w->ww_b.b];
|
|
cqq = cpp - 1;
|
|
cp = *cqq;
|
|
for (i = w->ww_b.b - row; --i > 0;)
|
|
*--cpp = *--cqq;
|
|
*cqq = cp;
|
|
|
|
/*
|
|
* Now clear the last line.
|
|
*/
|
|
if (visible)
|
|
wwclreol1(w, row, w->ww_b.l, deleted);
|
|
else {
|
|
cp += w->ww_b.l;
|
|
for (i = w->ww_b.nc; --i >= 0;)
|
|
cp++->c_w = ' ';
|
|
}
|
|
}
|