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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1997, by Sun Mircrosystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.6 */
/*LINTLIBRARY*/
#include <sys/types.h>
#include "private.h"
static void
link_col_major(MENU *m)
{
ITEM *i;
int n;
short c, r;
int left, up;
r = 0;
c = 0;
for (i = IthItem(m, 0), n = 0; i; i = IthItem(m, ++n)) {
X(i) = c;
Y(i) = r;
Left(i) = c ? IthItem(m, n-Rows(m)) : (ITEM *) NULL;
if (n + Rows(m) >= Nitems(m)) {
Right(i) = (ITEM *) NULL;
} else {
Right(i) = IthItem(m, n + Rows(m));
}
Up(i) = r ? IthItem(m, n-1) : (ITEM *) NULL;
Down(i) = (r == Rows(m)-1) ? (ITEM *)0 : IthItem(m, n+1);
if (++r == Rows(m)) {
r = 0;
c += 1;
}
}
if (r) {
Down(IthItem(m, n-1)) = IthItem(m, n - Rows(m));
}
if (Cyclic(m)) {
/* Set up left and right links at edge of menu */
r = Rows(m) * (Nitems(m)/Rows(m));
for (n = 0; n < Rows(m); n++) {
left = n + r;
if (left >= Nitems(m)) {
left -= Rows(m);
}
Left(IthItem(m, n)) = IthItem(m, left);
Right(IthItem(m, left)) = IthItem(m, n);
}
/* Setup up and down links at edge of menu */
for (n = 0; n < Nitems(m); n += Rows(m)) {
up = n + Rows(m) - 1;
if (up >= Nitems(m)) {
Up(IthItem(m, n)) = IthItem(m, n-1);
} else {
Up(IthItem(m, n)) = IthItem(m, up);
Down(IthItem(m, up)) = IthItem(m, n);
}
}
}
}
static void
link_row_major(MENU *m)
{
int n;
short c, r;
ITEM *i;
int left, up;
r = 0;
c = 0;
for (i = IthItem(m, 0), n = 0; i; i = IthItem(m, ++n)) {
X(i) = c;
Y(i) = r;
Left(i) = c ? IthItem(m, n-1) : (ITEM *) NULL;
Right(i) = (c == Cols(m)-1 || n == Nitems(m)-1) ? (ITEM *)0 :
IthItem(m, n+1);
Up(i) = r ? IthItem(m, n-Cols(m)) : (ITEM *) NULL;
if (n+Cols(m) < Nitems(m)) {
Down(i) = IthItem(m, n + Cols(m));
} else {
if (r == Rows(m)-1) {
/* Down is undefined if this is a complete */
/* last column */
Down(i) = (ITEM *) NULL;
} else {
/* Down is set to last item if the last */
/* column isn't full */
Down(i) = IthItem(m, Nitems(m)-1);
}
}
if (++c == Cols(m)) {
c = 0;
r += 1;
}
}
if (Cyclic(m)) {
/* Setup left and right links at edge of menu */
for (n = 0; n < Nitems(m); n += Cols(m)) {
left = n + Cols(m) - 1;
if (left >= Nitems(m)) {
left = Nitems(m) - 1;
}
Left(IthItem(m, n)) = IthItem(m, left);
Right(IthItem(m, left)) = IthItem(m, n);
}
/* Setup up and down links at edge of menu */
r = (Rows(m) - 1) * Cols(m);
for (n = 0; n < Cols(m); n++) {
up = n + r;
/* If there is an incomplete line below this one */
/* the point to the last item in the menu. */
if (up >= Nitems(m)) {
Up(IthItem(m, n)) = IthItem(m, Nitems(m)-1);
} else {
Up(IthItem(m, n)) = IthItem(m, up);
Down(IthItem(m, up)) = IthItem(m, n);
}
}
}
}
void
_link_items(MENU *m)
{
if (Items(m) && IthItem(m, 0)) {
ResetLink(m);
if (RowMajor(m)) {
link_row_major(m);
} else {
link_col_major(m);
}
}
}
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