NetBSD/lib/libmenu/post.c

/*	$NetBSD: post.c,v 1.7 2000/08/06 13:32:59 blymn Exp $	*/

/*-
 * Copyright (c) 1998-1999 Brett Lymn (blymn@baea.com.au, brett_lymn@yahoo.com.au)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software withough specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 */

#include <menu.h>
#include <stdlib.h>
#include "internals.h"

/*
 * Post the menu to the screen.  Call any defined init routines and then
 * draw the menu on the screen.
 */
int
post_menu(MENU *menu)
{
	int maxx, maxy, i;
	
	if (menu == NULL)
		return E_BAD_ARGUMENT;
	if (menu->posted == 1)
		return E_POSTED;
	if (menu->in_init == 1)
		return E_BAD_STATE;
	if (menu->items == NULL)
		return E_NOT_CONNECTED;
	if (*menu->items == NULL)
		return E_NOT_CONNECTED;
	if (menu->menu_win == NULL)
		return E_BAD_ARGUMENT;

	menu->in_init = 1;
	menu->cur_item = 0; /* reset current item in case it was set before */
	menu->top_row = 0; /* and the top row too */
	if (menu->pattern != NULL) { /* and the pattern buffer....sigh */
		free(menu->pattern);
		menu->plen = 0;
		menu->match_len = 0;
	}
	
	if (menu->menu_init != NULL)
		menu->menu_init(menu);
	if (menu->item_init != NULL)
		menu->item_init(menu);

	menu->in_init = 0;

	if (menu->menu_subwin == NULL) {
		menu->we_created = 1;
		menu->menu_subwin = derwin(menu->menu_win, menu->rows,
					   menu->cols * menu->max_item_width
					   + menu->cols, 0, 0);
		if (menu->menu_subwin == NULL) {
			menu->we_created = 0;
			return E_SYSTEM_ERROR;
		}
	}

	getmaxyx(menu->menu_subwin, maxy, maxx);
	if ((maxx == ERR) || (maxy == ERR)) return E_SYSTEM_ERROR;

	if ((menu->cols * menu->max_item_width + menu->cols - 1) > maxx)
		return E_NO_ROOM;

	for (i = 0; i < menu->item_count; i++) {
		menu->items[i]->selected = 0;
	}

	menu->posted = 1;
	return _menui_draw_menu(menu);
	
}

/*
 * Unpost the menu.  Call any defined termination routines and remove the
 * menu from the screen.
 */
int
unpost_menu(MENU *menu)
{
	if (menu == NULL)
		return E_BAD_ARGUMENT;
	if (menu->posted != 1)
		return E_NOT_POSTED;
	if (menu->in_init == 1)
		return E_BAD_STATE;
	if (menu->menu_subwin == NULL)
		return E_SYSTEM_ERROR;
	if (menu->menu_win == NULL)
		return E_SYSTEM_ERROR;

	if (menu->item_term != NULL)
		menu->item_term(menu);

	if (menu->menu_term != NULL)
		menu->menu_term(menu);

	menu->posted = 0;
	werase(menu->menu_subwin);
	wrefresh(menu->menu_subwin);
	if (menu->we_created == 1) {
		delwin(menu->menu_subwin);
		menu->menu_subwin = NULL;
	}
	wrefresh(menu->menu_win);
	return E_OK;
}