menu/common/post.c

/*
 * 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 1.12  */

/*LINTLIBRARY*/

#include <sys/types.h>
#include "private.h"

void
_post_item(MENU *m, ITEM *k)
{
    int foreon = FALSE;
    int backon = FALSE;
    int greyon = FALSE;
    chtype c;
    int i;

    /* Display the mark region of the item */

    if (!Selectable(k)) {
        (void) wattron(Win(m), Grey(m));
        greyon = TRUE;
        for (i = Marklen(m); i > 0; i--) {
            (void) waddch(Win(m), ' ');
        }
    } else {
        if (Value(k) || k == Current(m)) {
            (void) wattron(Win(m), Fore(m));
            foreon = TRUE;
        } else {
            (void) wattron(Win(m), Back(m));
            backon = TRUE;
        }

        /* Display the mark */
        if (Value(k) || (OneValue(m) && k == Current(m))) {
            if (Marklen(m)) {
                (void) waddstr(Win(m), Mark(m));
            }
        } else {
            for (i = Marklen(m); i > 0; i--) {
                (void) waddch(Win(m), ' ');
            }
        }
    }

    /* Display the name */

    (void) waddnstr(Win(m), Name(k), MaxName(m));
    if (ShowDesc(m) && MaxDesc(m) != 0) {
        c = Pad(m);
    } else {
        c = ' ';
    }
    for (i = MaxName(m) - NameLen(k); i > 0; i--) {
        (void) waddch(Win(m), c);
    }

    /* Display the description */

    if (ShowDesc(m) && MaxDesc(m) != 0) {
        (void) waddch(Win(m), Pad(m));
        if (DescriptionLen(k) != 0) {
            (void) waddstr(Win(m), Description(k));
        }
        for (i = MaxDesc(m) - DescriptionLen(k); i > 0; i--) {
            (void) waddch(Win(m), ' ');
        }
    }
    if (foreon) {
        (void) wattroff(Win(m), Fore(m));
    }
    if (backon) {
        (void) wattroff(Win(m), Back(m));
    }
    if (greyon) {
        (void) wattroff(Win(m), Grey(m));
    }
}

void
_move_post_item(MENU *m, ITEM *k)
{
    (void) wmove(Win(m), Y(k), X(k) * (Itemlen(m)+1));
    _post_item(m, k);
}

int
unpost_menu(MENU *m)
{
    if (!m) {
        return (E_BAD_ARGUMENT);
    }
    if (Indriver(m)) {
        return (E_BAD_STATE);
    }
    if (!Posted(m)) {
        return (E_NOT_POSTED);
    }
    Iterm(m);
    Mterm(m);
    (void) werase(US(m));
    wsyncup(US(m));
    (void) delwin(Sub(m));
    Sub(m) = (WINDOW *) NULL;
    (void) delwin(Win(m));
    Win(m) = (WINDOW *) NULL;
    ResetPost(m);
    return (E_OK);
}

/*
 * This routine draws the item indicated by oldcur first and then
 * draws the item indicated by Current.  This will have the affect
 * of unselecting the first item and selecting the next.
 */
void
_movecurrent(MENU *m, ITEM *oldcur)
{
    if (oldcur != Current(m)) {
        _move_post_item(m, oldcur);
        _move_post_item(m, Current(m));
    }
}

/*
 * Draw the entire menu into the super window
 * This routine assumes all items have been linked and
 * that the menu is in at least a pre-post state.
 */

void
_draw(MENU *m)
{
    int k;
    ITEM *i, *j;
    ITEM *si, *sj;

    k = 0;      /* Line number */
    i = IthItem(m, 0);
    si = Cyclic(m) ? i : (ITEM *) NULL;
    do {
        (void) wmove(Win(m), k++, 0);
        j = i;
        sj = Cyclic(m) ? j : (ITEM *) NULL;
        do {
            _post_item(m, j);
            if ((j = Right(j)) != sj) {
                (void) waddch(Win(m), ' ');
            }
        } while (j != sj);
    } while ((i = Down(i)) != si);
}

int
post_menu(MENU *m)
{
    ITEM **ip;
    int r, c;       /* visible # of rows and cols */

    if (!m) {
        return (E_BAD_ARGUMENT);
    }
    if (Indriver(m)) {
        return (E_BAD_STATE);
    }
    if (Posted(m)) {
        return (E_POSTED);
    }
    /* Make sure there is at least one item present */
    if (Items(m) && IthItem(m, 0)) {
        getmaxyx(US(m), r, c);

        /* Make sure the menu fits into the window horizontally */
        if (c < Width(m) || r < Height(m)) {
            return (E_NO_ROOM);
        }

        /* Create the menu window and derived windows */
        if ((Win(m) = newwin(Rows(m), Width(m), 0, 0)) ==
            (WINDOW *) NULL) {
            return (E_SYSTEM_ERROR);
        }

        /*
         * Take the minimum of the height of the menu (Height), the
         * physical height of the window (r), and the number of rows
         * in the menu (Rows).
         */
        r = min(min(r, Rows(m)), Height(m));

        if ((Sub(m) = derwin(Win(m), r, Width(m), 0, 0)) ==
            (WINDOW *)  NULL) {
            return (E_SYSTEM_ERROR);
        }

        /* If needed, link all items in the menu */
        if (LinkNeeded(m)) {
            _link_items(m);
        }

        SetPost(m);

        /* If only one value can be set then unset all values */
        /* to start. */
        if (OneValue(m)) {
            for (ip = Items(m); *ip; ip++) {
                Value(*ip) = FALSE;
            }
        }

        /* Go do the drawing of the menu */
        _draw(m);

        Minit(m);
        Iinit(m);
        _show(m);       /* Display the menu */
        return (E_OK);
    }
    return (E_NOT_CONNECTED);
}