/*      @(#)cmd2.c      8.1 (Berkeley) 6/6/93   */
/*      $NetBSD: cmd2.c,v 1.7 2009/04/14 08:50:06 lukem 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 "defs.h"

const char *help_shortcmd[] = {
        "#       Select window # and return to conversation mode",
        "%#      Select window # but stay in command mode",
        "escape  Return to conversation mode without changing window",
        "^^      Return to conversation mode and change to previous window",
        "c#      Close window #",
        "w       Open a new window",
        "m#      Move window #",
        "M#      Move window # to its previous position",
        "s#      Change the size of window #",
        "S#      Change window # to its previous size",
        "^Y      Scroll up one line",
        "^E      Scroll down one line",
        "^U      Scroll up half a window",
        "^D      Scroll down half a window",
        "^B      Scroll up a full window",
        "^F      Scroll down a full window",
        "h       Move cursor left",
        "j       Move cursor down",
        "k       Move cursor up",
        "l       Move cursor right",
        "y       Yank",
        "p       Put",
        "^S      Stop output in current window",
        "^Q      Restart output in current window",
        "^L      Redraw screen",
        "^Z      Suspend",
        "q       Quit",
        ":       Enter a long command",
        0
};

const char *help_longcmd[] = {
        ":alias name string ...  Make `name' an alias for `string ...'",
        ":alias                  Show all aliases",
        ":close # ...            Close windows",
        ":close all              Close all windows",
        ":cursor modes           Set the cursor modes",
        ":echo # string ...      Print `string ...' in window #",
        ":escape c               Set escape character to `c'",
        ":foreground # flag      Make # a foreground window, if `flag' is true",
        ":label # string         Set label of window # to `string'",
        ":list                   List all open windows",
        ":default_nline lines    Set default window buffer size to `lines'",
        ":default_shell string ...",
        "                        Set default shell to `string ...'",
        ":default_smooth flag    Set default smooth scroll flag",
        ":select #               Select window #",
        ":smooth # flag          Set window # to smooth scroll mode",
        ":source filename        Execute commands in `filename'",
        ":terse flag             Set terse mode",
        ":unalias name           Undefine `name' as an alias",
        ":unset variable         Deallocate `variable'",
        ":variable               List all variables",
        ":window [row col nrow ncol nline label pty frame mapnl keepopen smooth shell]",
        "                        Open a window at `row', `col' of size `nrow', `ncol',",
        "                        with `nline' lines in the buffer, and `label'",
        ":write # string ...     Write `string ...' to window # as input",
        0
};

int     help_print(struct ww *, const char *, const char **);

void
c_help(void)
{
        struct ww *w;

        if ((w = openiwin(wwnrow - 3, "Help")) == NULL) {
                error("Can't open help window: %s.", wwerror());
                return;
        }
        wwprintf(w, "The escape character is %c.\n", escapec);
        wwprintf(w, "(# represents one of the digits from 1 to 9.)\n\n");
        if (help_print(w, "Short commands", help_shortcmd) >= 0)
                (void) help_print(w, "Long commands", help_longcmd);
        closeiwin(w);
}

int
help_print(struct ww *w, const char *name, const char **list)
{
        wwprintf(w, "%s:\n\n", name);
        while (*list)
                switch (more(w, 0)) {
                case 0:
                        wwputs(*list++, w);
                        wwputc('\n', w);
                        break;
                case 1:
                        wwprintf(w, "%s: (continued)\n\n", name);
                        break;
                case 2:
                        return -1;
                }
        return more(w, 1) == 2 ? -1 : 0;
}

void
c_quit(void)
{
        char oldterse = terse;

        setterse(0);
        wwputs("Really quit [yn]? ", cmdwin);
        wwcurtowin(cmdwin);
        while (wwpeekc() < 0)
                wwiomux();
        if (wwgetc() == 'y') {
                wwputs("Yes", cmdwin);
                quit++;
        } else
                wwputc('\n', cmdwin);
        setterse(!quit && oldterse);
}