1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 /*LINTLIBRARY*/
41
42 #include <sys/types.h>
43 #include "curses_inc.h"
44
45 /* Make the changes in ancestors visible in win. */
46
47 void
wsyncdown(WINDOW * win)48 wsyncdown(WINDOW *win)
49 {
50 short *wbch, *wech, *pbch, *pech, bch, ech, endx;
51 int wy, px, py, endy;
52 WINDOW *par;
53
54 py = win->_pary;
55 px = win->_parx;
56 endy = win->_maxy;
57 endx = win->_maxx - 1;
58
59 for (par = win->_parent; par != NULL; par = par->_parent) {
60 if (par->_flags & (_WINCHANGED | _WIN_ADD_ONE |
61 _WIN_INS_ONE)) {
62 wbch = win->_firstch;
63 wech = win->_lastch;
64 pbch = par->_firstch + py;
65 pech = par->_lastch + py;
66
67 for (wy = 0; wy < endy; ++wy, ++wbch, ++wech,
68 ++pbch, ++pech) {
69 if (*pbch != _INFINITY) {
70 if ((bch = *pbch - px) < 0)
71 bch = 0;
72 if ((ech = *pech - px) > endx)
73 ech = endx;
74 if (!(bch > endx || ech < 0)) {
75 if (*wbch > bch)
76 *wbch = bch;
77 if (*wech < ech)
78 *wech = ech;
79 }
80 }
81 }
82 win->_flags |= _WINCHANGED;
83 }
84
85 py += par->_pary;
86 px += par->_parx;
87 }
88 }
89