xref: /illumos-gate/usr/src/lib/libeti/menu/common/chk.c (revision 7c478bd9)
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 /*	Copyright (c) 1988 AT&T	*/
23 /*	  All Rights Reserved  	*/
24 
25 
26 /*
27  * Copyright (c) 1997, by Sun Mircrosystems, Inc.
28  * All rights reserved.
29  */
30 
31 #pragma	ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.4	*/
32 
33 /*LINTLIBRARY*/
34 
35 #include <sys/types.h>
36 #include "private.h"
37 
38 /* Make sure top is not within a page of the end of the menu */
39 
40 void
_chk_top(MENU * m,int * top,ITEM * current)41 _chk_top(MENU *m, int *top, ITEM *current)
42 {
43 	if (Y(current) < *top) {
44 		*top = Y(current);
45 	}
46 	if (Y(current) >= *top + Height(m)) {
47 		*top = Y(current) - Height(m) + 1;
48 	}
49 }
50 
51 /*
52  * This routine makes sure top is in the correct position
53  * relative to current.  It is only used when current is
54  * explicitly set.
55  */
56 
57 void
_chk_current(MENU * m,int * top,ITEM * current)58 _chk_current(MENU *m, int *top, ITEM *current)
59 {
60 	if (Y(current) < *top) {
61 		*top = Y(current);
62 	}
63 	if (Y(current) >= *top + Height(m)) {
64 		*top = min(Y(current), Rows(m) - Height(m));
65 	}
66 }
67