xref: /onnv-gate/usr/src/lib/libcurses/screen/wsyncdown.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
28*0Sstevel@tonic-gate /*	  All Rights Reserved	*/
29*0Sstevel@tonic-gate 
30*0Sstevel@tonic-gate /*
31*0Sstevel@tonic-gate  * University Copyright- Copyright (c) 1982, 1986, 1988
32*0Sstevel@tonic-gate  * The Regents of the University of California
33*0Sstevel@tonic-gate  * All Rights Reserved
34*0Sstevel@tonic-gate  *
35*0Sstevel@tonic-gate  * University Acknowledgment- Portions of this document are derived from
36*0Sstevel@tonic-gate  * software developed by the University of California, Berkeley, and its
37*0Sstevel@tonic-gate  * contributors.
38*0Sstevel@tonic-gate  */
39*0Sstevel@tonic-gate 
40*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
41*0Sstevel@tonic-gate 
42*0Sstevel@tonic-gate /*LINTLIBRARY*/
43*0Sstevel@tonic-gate 
44*0Sstevel@tonic-gate #include	<sys/types.h>
45*0Sstevel@tonic-gate #include	"curses_inc.h"
46*0Sstevel@tonic-gate 
47*0Sstevel@tonic-gate /* Make the changes in ancestors visible in win. */
48*0Sstevel@tonic-gate 
49*0Sstevel@tonic-gate void
wsyncdown(WINDOW * win)50*0Sstevel@tonic-gate wsyncdown(WINDOW *win)
51*0Sstevel@tonic-gate {
52*0Sstevel@tonic-gate 	short	*wbch, *wech, *pbch, *pech, bch, ech, endx;
53*0Sstevel@tonic-gate 	int	wy, px, py, endy;
54*0Sstevel@tonic-gate 	WINDOW	*par;
55*0Sstevel@tonic-gate 
56*0Sstevel@tonic-gate 	py = win->_pary;
57*0Sstevel@tonic-gate 	px = win->_parx;
58*0Sstevel@tonic-gate 	endy = win->_maxy;
59*0Sstevel@tonic-gate 	endx = win->_maxx - 1;
60*0Sstevel@tonic-gate 
61*0Sstevel@tonic-gate 	for (par = win->_parent; par != NULL; par = par->_parent) {
62*0Sstevel@tonic-gate 		if (par->_flags & (_WINCHANGED | _WIN_ADD_ONE |
63*0Sstevel@tonic-gate 		    _WIN_INS_ONE)) {
64*0Sstevel@tonic-gate 			wbch = win->_firstch;
65*0Sstevel@tonic-gate 			wech = win->_lastch;
66*0Sstevel@tonic-gate 			pbch = par->_firstch + py;
67*0Sstevel@tonic-gate 			pech = par->_lastch + py;
68*0Sstevel@tonic-gate 
69*0Sstevel@tonic-gate 			for (wy = 0; wy < endy; ++wy, ++wbch, ++wech,
70*0Sstevel@tonic-gate 			    ++pbch, ++pech) {
71*0Sstevel@tonic-gate 				if (*pbch != _INFINITY) {
72*0Sstevel@tonic-gate 					if ((bch = *pbch - px) < 0)
73*0Sstevel@tonic-gate 						bch = 0;
74*0Sstevel@tonic-gate 					if ((ech = *pech - px) > endx)
75*0Sstevel@tonic-gate 						ech = endx;
76*0Sstevel@tonic-gate 					if (!(bch > endx || ech < 0)) {
77*0Sstevel@tonic-gate 						if (*wbch > bch)
78*0Sstevel@tonic-gate 							*wbch = bch;
79*0Sstevel@tonic-gate 						if (*wech < ech)
80*0Sstevel@tonic-gate 							*wech = ech;
81*0Sstevel@tonic-gate 					}
82*0Sstevel@tonic-gate 				}
83*0Sstevel@tonic-gate 			}
84*0Sstevel@tonic-gate 			win->_flags |= _WINCHANGED;
85*0Sstevel@tonic-gate 		}
86*0Sstevel@tonic-gate 
87*0Sstevel@tonic-gate 		py += par->_pary;
88*0Sstevel@tonic-gate 		px += par->_parx;
89*0Sstevel@tonic-gate 	}
90*0Sstevel@tonic-gate }
91