/*      $NetBSD: keyboard.c,v 1.26 2015/08/23 18:33:15 mrg Exp $        */

/*-
 * Copyright (c) 1980, 1992, 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. 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.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)keyboard.c  8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: keyboard.c,v 1.26 2015/08/23 18:33:15 mrg Exp $");
#endif /* not lint */

#include <sys/types.h>

#include <ctype.h>
#include <signal.h>
#include <termios.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>

#include "systat.h"
#include "extern.h"

extern sig_atomic_t needsredraw;

void
keyboard(void)
{
        int ch, rch, col;
        char *line;
        int i, linesz;
        static char help[] = "help";
        static char quit[] = "quit";

        ch = 0; /* XXX gcc */
        linesz = COLS - 2;              /* XXX does not get updated on SIGWINCH */
        if ((line = malloc(linesz)) == NULL) {
                error("malloc failed");
                die(0);
        }

        for (;;) {
                col = 0;
                move(CMDLINE, 0);

                while (col == 0 || (ch != '\r' && ch != '\n')) {
                        refresh();
                        for (;;) {
                                ch = getch();
                                if (!needsredraw)
                                        break;
                                redraw();
                        }
                        if (ch == ERR) {
                                display(SIGALRM);
                                continue;
                        }
                        if (ch == KEY_RESIZE) {
                                redraw();
                                continue;
                        }
                        ch &= 0177;
                        rch = ch;
                        if (col == 0) {
                                switch(ch) {
                                    case '\n':
                                    case '\r':
                                    case ' ':
                                        clearerror();
                                        display(0);
                                        break;
                                    case CTRL('l'):
                                        clearerror();
                                        wrefresh(curscr);
                                        break;
                                    case CTRL('g'):
                                        status();
                                        break;
                                    case '?':
                                    case 'H':
                                    case 'h':
                                        command(help);
                                        move(CMDLINE, 0);
                                        break;
                                    case 'Q':
                                    case 'q':
                                        command(quit);
                                        break;
                                    case ':':
                                        move(CMDLINE, 0);
                                        clrtoeol();
                                        addch(':');
                                        col++;
                                        break;
                                }
                                continue;
                        }
                        if (ch == '\b' || ch == '\177' || ch == erasechar()) {
                                if (col > 0)
                                        col--;
                                goto doerase;
                        }
                        if (ch == CTRL('w') && col > 0) {
                                while (--col >= 0 &&
                                    isspace((unsigned char)line[col]))
                                        continue;
                                col++;
                                while (--col >= 0 &&
                                    !isspace((unsigned char)line[col]))
                                        if (col == 0)
                                                break;
                                col++;
                                goto doerase;
                        }
                        if (ch == killchar() && col > 0) {
                                col = 1;
                doerase:
                                move(CMDLINE, col);
                                clrtoeol();
                                continue;
                        }
                        if (isprint(rch) || rch == ' ') {
                                if (col < linesz) {
                                        line[col] = rch;
                                        mvaddch(CMDLINE, col, rch);
                                        col++;
                                }
                        }
                }
                line[col] = '\0';
                /* pass commands as lowercase */
                for (i = 1; i < col ; i++)
                        line[i] = tolower((unsigned char)line[i]);
                command(line + 1);
        }
        /* NOTREACHED */
}