usr.bin/vi/nex/ex_map.c

/*-
 * Copyright (c) 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. 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
static char sccsid[] = "@(#)ex_map.c    8.6 (Berkeley) 12/2/93";
#endif /* not lint */

#include <sys/types.h>

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

#include "vi.h"
#include "seq.h"
#include "excmd.h"

/*
 * ex_map -- :map[!] [input] [replacement]
 *      Map a key/string or display mapped keys.
 *
 * Historical note:
 *      Historic vi maps were fairly bizarre, and likely to differ in
 *      very subtle and strange ways from this implementation.  Two
 *      things worth noting are that vi would often hang or drop core
 *      if the map was strange enough (ex: map X "xy$@x^V), or, simply
 *      not work.  One trick worth remembering is that if you put a
 *      mark at the start of the map, e.g. map X mx"xy ...), or if you
 *      put the map in a .exrc file, things would often work much better.
 *      No clue why.
 */
int
ex_map(sp, ep, cmdp)
        SCR *sp;
        EXF *ep;
        EXCMDARG *cmdp;
{
        enum seqtype stype;
        CHAR_T *input;
        size_t nlen;
        int key;
        char *name, buf[10];

        stype = F_ISSET(cmdp, E_FORCE) ? SEQ_INPUT : SEQ_COMMAND;

        switch (cmdp->argc) {
        case 0:
                if (seq_dump(sp, stype, 1) == 0)
                        msgq(sp, M_INFO, "No %s map entries.",
                            stype == SEQ_INPUT ? "input" : "command");
                return (0);
        case 2:
                input = cmdp->argv[0]->bp;
                break;
        default:
                abort();
        }

        /*
         * If the mapped string is #[0-9] (and wasn't quoted in any
         * way, then map to a function key.
         */
        nlen = 0;
        if (input[0] == '#' && isdigit(input[1]) && !input[2]) {
                key = atoi(input + 1);
                nlen = snprintf(buf, sizeof(buf), "f%d", key);
#ifdef notdef
                if (FKEY[key]) {                /* CCC */
                        input = FKEY[key];
                        name = buf;
                } else {
                        msgq(sp, M_ERR, "This terminal has no %s key.", buf);
                        return (1);
                }
#else
                name = NULL;
#endif
        } else {
                name = NULL;

                /* Some single keys may not be remapped in command mode. */
                if (stype == SEQ_COMMAND && input[1] == '\0')
                        switch (term_key_val(sp, input[0])) {
                        case K_COLON:
                        case K_CR:
                        case K_ESCAPE:
                        case K_NL:
                                msgq(sp, M_ERR,
                                    "The %s character may not be remapped.",
                                    charname(sp, input[0]));
                                return (1);
                        }
        }
        return (seq_set(sp, name, nlen, input, cmdp->argv[0]->len,
            cmdp->argv[1]->bp, cmdp->argv[1]->len, stype, 1));
}

/*
 * ex_unmap -- (:unmap[!] key)
 *      Unmap a key.
 */
int
ex_unmap(sp, ep, cmdp)
        SCR *sp;
        EXF *ep;
        EXCMDARG *cmdp;
{
        if (seq_delete(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len,
            F_ISSET(cmdp, E_FORCE) ? SEQ_INPUT : SEQ_COMMAND)) {
                msgq(sp, M_INFO, "\"%s\" isn't mapped.", cmdp->argv[0]->bp);
                return (1);
        }
        return (0);
}

/*
 * map_save --
 *      Save the mapped sequences to a file.
 */
int
map_save(sp, fp)
        SCR *sp;
        FILE *fp;
{
        if (seq_save(sp, fp, "map ", SEQ_COMMAND))
                return (1);
        return (seq_save(sp, fp, "map! ", SEQ_INPUT));
}