ex/ex_map.c

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  */
   9
  10 #include "config.h"
  11
  12 #ifndef lint
  13 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 $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18
  19 #include <bitstring.h>
  20 #include <ctype.h>
  21 #include <limits.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "../common/common.h"
  27
  28 /*
  29  * ex_map -- :map[!] [input] [replacement]
  30  *      Map a key/string or display mapped keys.
  31  *
  32  * Historical note:
  33  *      Historic vi maps were fairly bizarre, and likely to differ in
  34  *      very subtle and strange ways from this implementation.  Two
  35  *      things worth noting are that vi would often hang or drop core
  36  *      if the map was strange enough (ex: map X "xy$@x^V), or, simply
  37  *      not work.  One trick worth remembering is that if you put a
  38  *      mark at the start of the map, e.g. map X mx"xy ...), or if you
  39  *      put the map in a .exrc file, things would often work much better.
  40  *      No clue why.
  41  *
  42  * PUBLIC: int ex_map __P((SCR *, EXCMD *));
  43  */
  44 int
  45 ex_map(SCR *sp, EXCMD *cmdp)
  46 {
  47         seq_t stype;
  48         CHAR_T *input, *p;
  49
  50         stype = FL_ISSET(cmdp->iflags, E_C_FORCE) ? SEQ_INPUT : SEQ_COMMAND;
  51
  52         switch (cmdp->argc) {
  53         case 0:
  54                 if (seq_dump(sp, stype, 1) == 0)
  55                         msgq(sp, M_INFO, stype == SEQ_INPUT ?
  56                             "132|No input map entries" :
  57                             "133|No command map entries");
  58                 return (0);
  59         case 2:
  60                 input = cmdp->argv[0]->bp;
  61                 break;
  62         default:
  63                 abort();
  64         }
  65
  66         /*
  67          * If the mapped string is #[0-9]* (and wasn't quoted) then store the
  68          * function key mapping.  If the screen specific routine has been set,
  69          * call it as well.  Note, the SEQ_FUNCMAP type is persistent across
  70          * screen types, maybe the next screen type will get it right.
  71          */
  72         if (input[0] == '#' && isdigit(input[1])) {
  73                 for (p = input + 2; isdigit(*p); ++p);
  74                 if (p[0] != '\0')
  75                         goto nofunc;
  76
  77                 if (seq_set(sp, NULL, 0, input, cmdp->argv[0]->len,
  78                     cmdp->argv[1]->bp, cmdp->argv[1]->len, stype,
  79                     SEQ_FUNCMAP | SEQ_USERDEF))
  80                         return (1);
  81                 return (sp->gp->scr_fmap == NULL ? 0 :
  82                     sp->gp->scr_fmap(sp, stype, input, cmdp->argv[0]->len,
  83                     cmdp->argv[1]->bp, cmdp->argv[1]->len));
  84         }
  85
  86         /* Some single keys may not be remapped in command mode. */
  87 nofunc: if (stype == SEQ_COMMAND && input[1] == '\0')
  88                 switch (KEY_VAL(sp, input[0])) {
  89                 case K_COLON:
  90                 case K_ESCAPE:
  91                 case K_NL:
  92                         msgq(sp, M_ERR,
  93                             "134|The %s character may not be remapped",
  94                             KEY_NAME(sp, input[0]));
  95                         return (1);
  96                 }
  97         return (seq_set(sp, NULL, 0, input, cmdp->argv[0]->len,
  98             cmdp->argv[1]->bp, cmdp->argv[1]->len, stype, SEQ_USERDEF));
  99 }
 100
 101 /*
 102  * ex_unmap -- (:unmap[!] key)
 103  *      Unmap a key.
 104  *
 105  * PUBLIC: int ex_unmap __P((SCR *, EXCMD *));
 106  */
 107 int
 108 ex_unmap(SCR *sp, EXCMD *cmdp)
 109 {
 110         if (seq_delete(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len,
 111             FL_ISSET(cmdp->iflags, E_C_FORCE) ? SEQ_INPUT : SEQ_COMMAND)) {
 112                 msgq_wstr(sp, M_INFO,
 113                     cmdp->argv[0]->bp, "135|\"%s\" isn't currently mapped");
 114                 return (1);
 115         }
 116         return (0);
 117 }