1 /* @(#)wwinsline.c 8.1 (Berkeley) 6/6/93 */
2 /* $NetBSD: wwinsline.c,v 1.6 2003/08/07 11:17:40 agc Exp $ */
3
4 /*
5 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Edward Wang at The University of California, Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "ww.h"
37
38 void
wwinsline(struct ww * w,int row)39 wwinsline(struct ww *w, int row)
40 {
41 int i;
42 union ww_char **cpp, **cqq;
43 union ww_char *cp;
44 int row1, row2;
45 char deleted;
46 int visible;
47
48 /*
49 * Scroll first.
50 */
51 if ((row1 = row) < w->ww_i.t) {
52 row1 = w->ww_i.t;
53 visible = 0;
54 } else
55 visible = 1;
56 if ((row2 = w->ww_b.b) > w->ww_i.b) {
57 row2 = w->ww_i.b;
58 }
59 deleted = wwscroll1(w, row1, row2, -1, visible);
60
61 /*
62 * Fix the buffer.
63 * But leave clearing the last line for wwclreol().
64 */
65 cpp = &w->ww_buf[w->ww_b.b];
66 cqq = cpp - 1;
67 cp = *cqq;
68 for (i = w->ww_b.b - row; --i > 0;)
69 *--cpp = *--cqq;
70 *cqq = cp;
71
72 /*
73 * Now clear the last line.
74 */
75 if (visible)
76 wwclreol1(w, row, w->ww_b.l, deleted);
77 else {
78 cp += w->ww_b.l;
79 for (i = w->ww_b.nc; --i >= 0;)
80 cp++->c_w = ' ';
81 }
82 }
83