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 /*LINTLIBRARY*/
32
33 #include <sys/types.h>
34 #include "private.h"
35
36 /* Make sure top is not within a page of the end of the menu */
37
38 void
_chk_top(MENU * m,int * top,ITEM * current)39 _chk_top(MENU *m, int *top, ITEM *current)
40 {
41 if (Y(current) < *top) {
42 *top = Y(current);
43 }
44 if (Y(current) >= *top + Height(m)) {
45 *top = Y(current) - Height(m) + 1;
46 }
47 }
48
49 /*
50 * This routine makes sure top is in the correct position
51 * relative to current. It is only used when current is
52 * explicitly set.
53 */
54
55 void
_chk_current(MENU * m,int * top,ITEM * current)56 _chk_current(MENU *m, int *top, ITEM *current)
57 {
58 if (Y(current) < *top) {
59 *top = Y(current);
60 }
61 if (Y(current) >= *top + Height(m)) {
62 *top = min(Y(current), Rows(m) - Height(m));
63 }
64 }
65