/*      @(#)cmd.c       8.1 (Berkeley) 6/6/93   */
/*      $NetBSD: cmd.c,v 1.8 2003/08/07 11:17:21 agc Exp $      */

/*
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * 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 <unistd.h>
#include "defs.h"
#include "char.h"

int     checkproc(struct ww *);

void
docmd(void)
{
        int c;
        struct ww *w;
        char out = 0;

        while (!out && !quit) {
                if ((c = wwgetc()) < 0) {
                        if (terse)
                                wwsetcursor(0, 0);
                        else {
                                wwputs("Command: ", cmdwin);
                                wwcurtowin(cmdwin);
                        }
                        do
                                wwiomux();
                        while ((c = wwgetc()) < 0);
                }
                if (!terse)
                        wwputc('\n', cmdwin);
                switch (c) {
                default:
                        if (c != escapec)
                                break;
                        /* FALLTHROUGH */
                case 'h': case 'j': case 'k': case 'l':
                case 'y': case 'p':
                case ctrl('y'):
                case ctrl('e'):
                case ctrl('u'):
                case ctrl('d'):
                case ctrl('b'):
                case ctrl('f'):
                case ctrl('s'):
                case ctrl('q'):
                case ctrl('['):
                        if (selwin == 0) {
                                error("No window.");
                                continue;
                        }
                }
                switch (c) {
                case '1': case '2': case '3': case '4': case '5':
                case '6': case '7': case '8': case '9':
                        if ((w = window[c - '1']) == NULL) {
                                error("%c: No such window.", c);
                                break;
                        }
                        setselwin(w);
                        if (checkproc(selwin) >= 0)
                                 out = 1;
                        break;
                case '%':
                        if ((w = getwin()) != NULL)
                                setselwin(w);
                        break;
                case ctrl('^'):
                        if (lastselwin != 0) {
                                setselwin(lastselwin);
                                if (checkproc(selwin) >= 0)
                                        out = 1;
                        } else
                                error("No previous window.");
                        break;
                case 'c':
                        if ((w = getwin()) != NULL)
                                closewin(w);
                        break;
                case 'w':
                        c_window();
                        break;
                case 'm':
                        if ((w = getwin()) != NULL)
                                c_move(w);
                        break;
                case 'M':
                        if ((w = getwin()) != NULL)
                                movewin(w, w->ww_alt.t, w->ww_alt.l);
                        break;
                case 's':
                        if ((w = getwin()) != NULL)
                                c_size(w);
                        break;
                case 'S':
                        if ((w = getwin()) != NULL)
                                sizewin(w, w->ww_alt.nr, w->ww_alt.nc);
                        break;
                case 'y':
                        c_yank();
                        break;
                case 'p':
                        c_put();
                        break;
                case ':':
                        c_colon();
                        break;
                case 'h':
                        (void) wwwrite(selwin, "\b", 1);
                        break;
                case 'j':
                        (void) wwwrite(selwin, "\n", 1);
                        break;
                case 'k':
                        (void) wwwrite(selwin, "\033A", 2);
                        break;
                case 'l':
                        (void) wwwrite(selwin, "\033C", 2);
                        break;
                case ctrl('e'):
                        wwscroll(selwin, 1);
                        break;
                case ctrl('y'):
                        wwscroll(selwin, -1);
                        break;
                case ctrl('d'):
                        wwscroll(selwin, selwin->ww_w.nr / 2);
                        break;
                case ctrl('u'):
                        wwscroll(selwin, - selwin->ww_w.nr / 2);
                        break;
                case ctrl('f'):
                        wwscroll(selwin, selwin->ww_w.nr);
                        break;
                case ctrl('b'):
                        wwscroll(selwin, - selwin->ww_w.nr);
                        break;
                case ctrl('s'):
                        stopwin(selwin);
                        break;
                case ctrl('q'):
                        startwin(selwin);
                        break;
                case ctrl('l'):
                        wwredraw();
                        break;
                case '?':
                        c_help();
                        break;
                case ctrl('['):
                        if (checkproc(selwin) >= 0)
                                out = 1;
                        break;
                case ctrl('z'):
                        wwsuspend();
                        break;
                case 'q':
                        c_quit();
                        break;
                /* debugging stuff */
                case '&':
                        if (debug) {
                                c_debug();
                                break;
                        }
                        /* FALLTHROUGH */
                default:
                        if (c == escapec) {
                                if (checkproc(selwin) >= 0) {
                                        (void) write(selwin->ww_pty,
                                                &escapec, 1);
                                        out = 1;
                                }
                        } else {
                                if (!terse)
                                        wwbell();
                                error("Type ? for help.");
                        }
                }
        }
        if (!quit)
                setcmd(0);
}

struct ww *
getwin(void)
{
        int c;
        struct ww *w = NULL;

        if (!terse)
                wwputs("Which window? ", cmdwin);
        wwcurtowin(cmdwin);
        while ((c = wwgetc()) < 0)
                wwiomux();
        if (debug && c == 'c')
                w = cmdwin;
        else if (debug && c == 'f')
                w = framewin;
        else if (debug && c == 'b')
                w = boxwin;
        else if (c >= '1' && c < NWINDOW + '1')
                w = window[c - '1'];
        else if (c == '+')
                w = selwin;
        else if (c == '-')
                w = lastselwin;
        if (w == NULL)
                wwbell();
        if (!terse)
                wwputc('\n', cmdwin);
        return w;
}

int
checkproc(struct ww *w)
{
        if (w->ww_state != WWS_HASPROC) {
                error("No process in window.");
                return -1;
        }
        return 0;
}

void
setcmd(char new)
{
        if (new && !incmd) {
                if (!terse)
                        wwadd(cmdwin, &wwhead);
                if (selwin != 0)
                        wwcursor(selwin, 1);
                wwcurwin = 0;
        } else if (!new && incmd) {
                if (!terse) {
                        wwdelete(cmdwin);
                        reframe();
                }
                if (selwin != 0)
                        wwcursor(selwin, 0);
                wwcurwin = selwin;
        }
        incmd = new;
}

void
setterse(char new)
{
        if (incmd) {
                if (new && !terse) {
                        wwdelete(cmdwin);
                        reframe();
                } else if (!new && terse)
                        wwadd(cmdwin, &wwhead);
        }
        terse = new;
}

/*
 * Set the current window.
 */
void
setselwin(struct ww *w)
{
        if (selwin == w)
                return;
        if (selwin != 0)
                lastselwin = selwin;
        if ((selwin = w) != NULL)
                front(selwin, 1);
}