source: trunk/third/talk/talk/init_disp.c @ 9165

/*      $NetBSD: init_disp.c,v 1.6 1994/12/09 02:14:17 jtc Exp $        */

/*
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  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. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */

#ifndef lint
#if 0
static char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94";
#endif
static char rcsid[] = "$NetBSD: init_disp.c,v 1.6 1994/12/09 02:14:17 jtc Exp $";
#endif /* not lint */

/*
 * Initialization code for the display package,
 * as well as the signal handling routines.
 */

#include <sys/ioctl.h>

#include <termios.h>
#include <signal.h>
#include "talk.h"

/* 
 * Set up curses, catch the appropriate signals,
 * and build the various windows.
 */
init_display()
{
        void sig_sent();
        struct sigaction action;

        if (initscr() == NULL) {
                fprintf(stderr, "talk: Terminal type unset or lacking necessary features.\n");
                exit(1);
        }
        sigaction(SIGTSTP, NULL, &action);
        sigaddset(&action.sa_mask, SIGALRM);
        sigaction(SIGTSTP, &action, NULL);
        curses_initialized = 1;
        clear();
        refresh();
        noecho();
        crmode();
        action.sa_handler = sig_sent;
        sigemptyset(&action.sa_mask);
        action.sa_flags = 0;
        sigaction(SIGINT, &action, NULL);
        sigaction(SIGPIPE, &action, NULL);
        /* curses takes care of ^Z */
        my_win.x_nlines = LINES / 2;
        my_win.x_ncols = COLS;
        my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
        scrollok(my_win.x_win, FALSE);
        wclear(my_win.x_win);

        his_win.x_nlines = LINES / 2 - 1;
        his_win.x_ncols = COLS;
        his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
            my_win.x_nlines+1, 0);
        scrollok(his_win.x_win, FALSE);
        wclear(his_win.x_win);

        line_win = newwin(1, COLS, my_win.x_nlines, 0);
        box(line_win, '-', '-');
        wrefresh(line_win);
        /* let them know we are working on it */
        current_state = "No connection yet";
}

/*
 * Trade edit characters with the other talk. By agreement
 * the first three characters each talk transmits after
 * connection are the three edit characters.
 */
set_edit_chars()
{
        char buf[3];
        int cc;
        struct termios tty;
        
        tcgetattr(0, &tty);
        my_win.cerase = tty.c_cc[VERASE];
        my_win.kill = tty.c_cc[VKILL];
        if (tty.c_cc[VWERASE] == (unsigned char) -1)
                my_win.werase = '\027';  /* control W */
        else
                my_win.werase = tty.c_cc[VWERASE];
        buf[0] = my_win.cerase;
        buf[1] = my_win.kill;
        buf[2] = my_win.werase;
        cc = write(sockt, buf, sizeof(buf));
        if (cc != sizeof(buf) )
                p_error("Lost the connection");
        cc = read(sockt, buf, sizeof(buf));
        if (cc != sizeof(buf) )
                p_error("Lost the connection");
        his_win.cerase = buf[0];
        his_win.kill = buf[1];
        his_win.werase = buf[2];
}

void
sig_sent()
{

        message("Connection closing. Exiting");
        quit();
}

/*
 * All done talking...hang up the phone and reset terminal thingy's
 */
quit()
{

        if (curses_initialized) {
                wmove(his_win.x_win, his_win.x_nlines-1, 0);
                wclrtoeol(his_win.x_win);
                wrefresh(his_win.x_win);
                endwin();
        }
        if (invitation_waiting)
                send_delete();
        exit(0);
}