usr/src/lib/libeti/menu/common/chk.c

   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
  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
  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 }