xref: /illumos-gate/usr/src/ucblib/libcurses/id_subwins.c (revision ddb365bfc9e868ad24ccdcb0dc91af18b10df082)
1 /*
2  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
7 /*	  All Rights Reserved  	*/
8 
9 /*
10  * Copyright (c) 1980 Regents of the University of California.
11  * All rights reserved.  The Berkeley software License Agreement
12  * specifies the terms and conditions for redistribution.
13  */
14 
15 /*LINTLIBRARY*/
16 
17 #ifndef lint
18 static char
19 sccsid[] = "@(#)id_subwins.c 1.3 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
20 #endif	/* not lint */
21 
22 #include	"curses.ext"
23 
24 /*
25  * _id_subwins:
26  *	Re-sync the pointers to _y for all the subwindows.
27  */
28 
29 void
30 _id_subwins(WINDOW *orig)
31 {
32 	WINDOW	*win;
33 	int	realy;
34 	int	y, oy;
35 
36 	realy = orig->_begy + orig->_cury;
37 	for (win = orig->_nextp; win != orig; win = win->_nextp) {
38 		/*
39 		 * If the window ends before our current position,
40 		 * don't need to do anything.
41 		 */
42 		if (win->_begy + win->_maxy <= realy)
43 			continue;
44 
45 		oy = orig->_cury;
46 		for (y = realy - win->_begy; y < win->_maxy; y++, oy++)
47 			win->_y[y] = &orig->_y[oy][win->_ch_off];
48 	}
49 }
50