1/*	$OpenBSD: ex_map.c,v 1.9 2016/05/27 09:18:12 martijn Exp $	*/
2
3/*-
4 * Copyright (c) 1992, 1993, 1994
5 *	The Regents of the University of California.  All rights reserved.
6 * Copyright (c) 1992, 1993, 1994, 1995, 1996
7 *	Keith Bostic.  All rights reserved.
8 *
9 * See the LICENSE file for redistribution information.
10 */
11
12#include "config.h"
13
14#include <sys/types.h>
15#include <sys/queue.h>
16
17#include <bitstring.h>
18#include <ctype.h>
19#include <limits.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23
24#include "../common/common.h"
25
26/*
27 * ex_map -- :map[!] [input] [replacement]
28 *	Map a key/string or display mapped keys.
29 *
30 * Historical note:
31 *	Historic vi maps were fairly bizarre, and likely to differ in
32 *	very subtle and strange ways from this implementation.  Two
33 *	things worth noting are that vi would often hang or drop core
34 *	if the map was strange enough (ex: map X "xy$@x^V), or, simply
35 *	not work.  One trick worth remembering is that if you put a
36 *	mark at the start of the map, e.g. map X mx"xy ...), or if you
37 *	put the map in a .exrc file, things would often work much better.
38 *	No clue why.
39 *
40 * PUBLIC: int ex_map(SCR *, EXCMD *);
41 */
42int
43ex_map(SCR *sp, EXCMD *cmdp)
44{
45	seq_t stype;
46	CHAR_T *input, *p;
47
48	stype = FL_ISSET(cmdp->iflags, E_C_FORCE) ? SEQ_INPUT : SEQ_COMMAND;
49
50	switch (cmdp->argc) {
51	case 0:
52		if (seq_dump(sp, stype, 1) == 0)
53			msgq(sp, M_INFO, stype == SEQ_INPUT ?
54			    "No input map entries" :
55			    "No command map entries");
56		return (0);
57	case 2:
58		input = cmdp->argv[0]->bp;
59		break;
60	default:
61		abort();
62	}
63
64	/*
65	 * If the mapped string is #[0-9]* (and wasn't quoted) then store the
66	 * function key mapping.  If the screen specific routine has been set,
67	 * call it as well.  Note, the SEQ_FUNCMAP type is persistent across
68	 * screen types, maybe the next screen type will get it right.
69	 */
70	if (input[0] == '#' && isdigit(input[1])) {
71		for (p = input + 2; isdigit(*p); ++p);
72		if (p[0] != '\0')
73			goto nofunc;
74
75		if (seq_set(sp, NULL, 0, input, cmdp->argv[0]->len,
76		    cmdp->argv[1]->bp, cmdp->argv[1]->len, stype,
77		    SEQ_FUNCMAP | SEQ_USERDEF))
78			return (1);
79		return (sp->gp->scr_fmap == NULL ? 0 :
80		    sp->gp->scr_fmap(sp, stype, input, cmdp->argv[0]->len,
81		    cmdp->argv[1]->bp, cmdp->argv[1]->len));
82	}
83
84	/* Some single keys may not be remapped in command mode. */
85nofunc:	if (stype == SEQ_COMMAND && input[1] == '\0')
86		switch (KEY_VAL(sp, input[0])) {
87		case K_COLON:
88		case K_ESCAPE:
89		case K_NL:
90			msgq(sp, M_ERR,
91			    "The %s character may not be remapped",
92			    KEY_NAME(sp, input[0]));
93			return (1);
94		}
95	return (seq_set(sp, NULL, 0, input, cmdp->argv[0]->len,
96	    cmdp->argv[1]->bp, cmdp->argv[1]->len, stype, SEQ_USERDEF));
97}
98
99/*
100 * ex_unmap -- (:unmap[!] key)
101 *	Unmap a key.
102 *
103 * PUBLIC: int ex_unmap(SCR *, EXCMD *);
104 */
105int
106ex_unmap(SCR *sp, EXCMD *cmdp)
107{
108	if (seq_delete(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len,
109	    FL_ISSET(cmdp->iflags, E_C_FORCE) ? SEQ_INPUT : SEQ_COMMAND)) {
110		msgq_str(sp, M_INFO,
111		    cmdp->argv[0]->bp, "\"%s\" isn't currently mapped");
112		return (1);
113	}
114	return (0);
115}
116