xref: /freebsd-src/contrib/bsddialog/lib/libbsddialog.c (revision d93b4d32034df7cd70e80b496e8fe8c1bc57c629)

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2021 Alfonso Sabato Siciliano
 *
 * 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. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 */

#ifdef PORTNCURSES
#include <ncurses/ncurses.h>
#else
#include <ncurses.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "bsddialog.h"
#include "lib_util.h"
#include "bsddialog_theme.h"

/*
 * This file implements public functions not related to a specific dialog.
 * lib_utils.h/c: private functions to implement the library.
 * theme.h/c: public API related to themes.
 * Dialogs implementation:
 *  infobox.c    infobox
 *  messgebox.c  msgbox - yesno
 *  menubox.c    buildlist - checklist - menu - mixedlist - radiolist
 *  formbox.c    inputbox - passwordbox - form - passwordform - mixedform
 *  barbox.c     gauge - mixedgauge - rangebox - pause - progressview
 *  textbox.c    textbox
 *  timebox.c    timebox - calendar
 */

extern struct bsddialog_theme t;

int bsddialog_init(void)
{
	int i, j, c, error;

	set_error_string("");

	if(initscr() == NULL)
		RETURN_ERROR("Cannot init ncurses (initscr)");

	error = OK;
	error += keypad(stdscr, TRUE);
	nl();
	error += cbreak();
	error += noecho();
	curs_set(0);
	if(error != OK) {
		bsddialog_end();
		RETURN_ERROR("Cannot init ncurses (keypad and cursor)");
	}

	c = 1;
	error += start_color();
	for (i=0; i<8; i++)
		for(j=0; j<8; j++) {
			error += init_pair(c, i, j);
			c++;
	}
	if(error != OK) {
		bsddialog_end();
		RETURN_ERROR("Cannot init ncurses (colors)");
	}

	if (bsddialog_set_default_theme(BSDDIALOG_THEME_DEFAULT) != 0) {
		bsddialog_end();
		return (BSDDIALOG_ERROR);
	}

	return (BSDDIALOG_OK);
}

int bsddialog_end(void)
{
	if (endwin() != OK)
		RETURN_ERROR("Cannot end ncurses (endwin)");

	return (BSDDIALOG_OK);
}

int bsddialog_backtitle(struct bsddialog_conf *conf, char *backtitle)
{
	mvaddstr(0, 1, backtitle);
	if (conf->no_lines != true)
		mvhline(1, 1, conf->ascii_lines ? '-' : ACS_HLINE, COLS-2);

	refresh();

	return (BSDDIALOG_OK);
}

const char *bsddialog_geterror(void)
{
	return (get_error_string());
}

int bsddialog_initconf(struct bsddialog_conf *conf)
{
	if (conf == NULL)
		RETURN_ERROR("conf is NULL");
	if (sizeof(*conf) != sizeof(struct bsddialog_conf))
		RETURN_ERROR("Bad conf size");

	memset(conf, 0, sizeof(struct bsddialog_conf));
	conf->y = BSDDIALOG_CENTER;
	conf->x = BSDDIALOG_CENTER;
	conf->shadow = true;

	return (BSDDIALOG_OK);
}

int bsddialog_clearterminal(void)
{
	if (clear() != OK)
		RETURN_ERROR("Cannot clear the terminal");
	refresh();

	return (BSDDIALOG_OK);
}