dist/nvi/ex/ex_map.c

   1 /*      $NetBSD$ */
   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 #ifndef lint
  15 static const char sccsid[] = "Id: ex_map.c,v 10.11 2001/06/25 15:19:17 skimo Exp (Berkeley) Date: 2001/06/25 15:19:17";
  16 #endif /* not lint */
  17
  18 #include <sys/types.h>
  19 #include <sys/queue.h>
  20
  21 #include <bitstring.h>
  22 #include <ctype.h>
  23 #include <limits.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include "../common/common.h"
  29
  30 /*
  31  * ex_map -- :map[!] [input] [replacement]
  32  *      Map a key/string or display mapped keys.
  33  *
  34  * Historical note:
  35  *      Historic vi maps were fairly bizarre, and likely to differ in
  36  *      very subtle and strange ways from this implementation.  Two
  37  *      things worth noting are that vi would often hang or drop core
  38  *      if the map was strange enough (ex: map X "xy$@x^V), or, simply
  39  *      not work.  One trick worth remembering is that if you put a
  40  *      mark at the start of the map, e.g. map X mx"xy ...), or if you
  41  *      put the map in a .exrc file, things would often work much better.
  42  *      No clue why.
  43  *
  44  * PUBLIC: int ex_map __P((SCR *, EXCMD *));
  45  */
  46 int
  47 ex_map(SCR *sp, EXCMD *cmdp)
  48 {
  49         seq_t stype;
  50         CHAR_T *input, *p;
  51
  52         stype = FL_ISSET(cmdp->iflags, E_C_FORCE) ? SEQ_INPUT : SEQ_COMMAND;
  53
  54         switch (cmdp->argc) {
  55         case 0:
  56                 if (seq_dump(sp, stype, 1) == 0)
  57                         msgq(sp, M_INFO, stype == SEQ_INPUT ?
  58                             "132|No input map entries" :
  59                             "133|No command map entries");
  60                 return (0);
  61         case 2:
  62                 input = cmdp->argv[0]->bp;
  63                 break;
  64         default:
  65                 abort();
  66         }
  67
  68         /*
  69          * If the mapped string is #[0-9]* (and wasn't quoted) then store the
  70          * function key mapping.  If the screen specific routine has been set,
  71          * call it as well.  Note, the SEQ_FUNCMAP type is persistent across
  72          * screen types, maybe the next screen type will get it right.
  73          */
  74         if (input[0] == '#' && isdigit(input[1])) {
  75                 for (p = input + 2; isdigit(*p); ++p);
  76                 if (p[0] != '\0')
  77                         goto nofunc;
  78
  79                 if (seq_set(sp, NULL, 0, input, cmdp->argv[0]->len,
  80                     cmdp->argv[1]->bp, cmdp->argv[1]->len, stype,
  81                     SEQ_FUNCMAP | SEQ_USERDEF))
  82                         return (1);
  83                 return (sp->gp->scr_fmap == NULL ? 0 :
  84                     sp->gp->scr_fmap(sp, stype, input, cmdp->argv[0]->len,
  85                     cmdp->argv[1]->bp, cmdp->argv[1]->len));
  86         }
  87
  88         /* Some single keys may not be remapped in command mode. */
  89 nofunc: if (stype == SEQ_COMMAND && input[1] == '\0')
  90                 switch (KEY_VAL(sp, input[0])) {
  91                 case K_COLON:
  92                 case K_ESCAPE:
  93                 case K_NL:
  94                         msgq(sp, M_ERR,
  95                             "134|The %s character may not be remapped",
  96                             KEY_NAME(sp, input[0]));
  97                         return (1);
  98                 }
  99         return (seq_set(sp, NULL, 0, input, cmdp->argv[0]->len,
 100             cmdp->argv[1]->bp, cmdp->argv[1]->len, stype, SEQ_USERDEF));
 101 }
 102
 103 /*
 104  * ex_unmap -- (:unmap[!] key)
 105  *      Unmap a key.
 106  *
 107  * PUBLIC: int ex_unmap __P((SCR *, EXCMD *));
 108  */
 109 int
 110 ex_unmap(SCR *sp, EXCMD *cmdp)
 111 {
 112         if (seq_delete(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len,
 113             FL_ISSET(cmdp->iflags, E_C_FORCE) ? SEQ_INPUT : SEQ_COMMAND)) {
 114                 msgq_wstr(sp, M_INFO,
 115                     cmdp->argv[0]->bp, "135|\"%s\" isn't currently mapped");
 116                 return (1);
 117         }
 118         return (0);
 119 }