src/editor/editkeys.c

   1 /* Editor key translation.
   2
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   4    2005, 2006, 2007 Free Software Foundation, Inc.
   5
   6    Authors: 1996, 1997 Paul Sheer
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21    02110-1301, USA.
  22  */
  23
  24 /** \file
  25  *  \brief Source: editor key translation
  26  */
  27
  28 #include <config.h>
  29
  30 #include <assert.h>
  31 #include <stdio.h>
  32 #include <stdarg.h>
  33 #include <sys/types.h>
  34 #include <unistd.h>
  35 #include <string.h>
  36 #include <ctype.h>
  37 #include <errno.h>
  38 #include <sys/stat.h>
  39
  40 #include <stdlib.h>
  41
  42 #include "lib/global.h"
  43 #include "lib/tty/tty.h"        /* keys */
  44 #include "lib/tty/key.h"        /* KEY_M_SHIFT */
  45 #include "lib/strutil.h"        /* str_isutf8 () */
  46 #include "lib/util.h"           /* is_printable() */
  47 #include "lib/charsets.h"       /* convert_from_input_c() */
  48
  49 #include "edit-impl.h"
  50 #include "edit-widget.h"        /* WEdit */
  51 #include "editcmd_dialogs.h"
  52
  53 #include "src/keybind-defaults.h"       /* keybind_lookup_keymap_command() */
  54
  55 /*** global variables ****************************************************************************/
  56
  57 /*** file scope macro definitions ****************************************************************/
  58
  59 /*** file scope type declarations ****************************************************************/
  60
  61 /*** file scope variables ************************************************************************/
  62
  63 /*** file scope functions ************************************************************************/
  64 /* --------------------------------------------------------------------------------------------- */
  65
  66 /* --------------------------------------------------------------------------------------------- */
  67 /*** public functions ****************************************************************************/
  68 /* --------------------------------------------------------------------------------------------- */
  69
  70 /*
  71  * Translate the keycode into either 'command' or 'char_for_insertion'.
  72  * 'command' is one of the editor commands from cmddef.h.
  73  */
  74 int
  75 edit_translate_key (WEdit * edit, long x_key, int *cmd, int *ch)
  76 {
  77     unsigned long command = (unsigned long) CK_InsertChar;
  78     int char_for_insertion = -1;
  79     int c;
  80
  81     /* an ordinary insertable character */
  82     if (!edit->extmod && x_key < 256)
  83     {
  84 #ifdef HAVE_CHARSET
  85         if (edit->charpoint >= 4)
  86         {
  87             edit->charpoint = 0;
  88             edit->charbuf[edit->charpoint] = '\0';
  89         }
  90         if (edit->charpoint < 4)
  91         {
  92             edit->charbuf[edit->charpoint++] = x_key;
  93             edit->charbuf[edit->charpoint] = '\0';
  94         }
  95
  96         /* input from 8-bit locale */
  97         if (!mc_global.utf8_display)
  98         {
  99             /* source in 8-bit codeset */
 100             if (!edit->utf8)
 101             {
 102 #endif /* HAVE_CHARSET */
 103                 c = convert_from_input_c (x_key);
 104                 if (is_printable (c))
 105                 {
 106                     char_for_insertion = c;
 107                     goto fin;
 108                 }
 109 #ifdef HAVE_CHARSET
 110             }
 111             else
 112             {
 113                 c = convert_from_input_c (x_key);
 114                 if (is_printable (c))
 115                 {
 116                     char_for_insertion = convert_from_8bit_to_utf_c2 ((unsigned char) x_key);
 117                     goto fin;
 118                 }
 119             }
 120             /* UTF-8 locale */
 121         }
 122         else
 123         {
 124             /* source in UTF-8 codeset */
 125             if (edit->utf8)
 126             {
 127                 int res = str_is_valid_char (edit->charbuf, edit->charpoint);
 128                 if (res < 0)
 129                 {
 130                     if (res != -2)
 131                     {
 132                         edit->charpoint = 0;    /* broken multibyte char, skip */
 133                         goto fin;
 134                     }
 135                     char_for_insertion = x_key;
 136                     goto fin;
 137                 }
 138                 else
 139                 {
 140                     edit->charbuf[edit->charpoint] = '\0';
 141                     edit->charpoint = 0;
 142                     if (g_unichar_isprint (g_utf8_get_char (edit->charbuf)))
 143                     {
 144                         char_for_insertion = x_key;
 145                         goto fin;
 146                     }
 147                 }
 148
 149                 /* 8-bit source */
 150             }
 151             else
 152             {
 153                 int res = str_is_valid_char (edit->charbuf, edit->charpoint);
 154                 if (res < 0)
 155                 {
 156                     if (res != -2)
 157                     {
 158                         edit->charpoint = 0;    /* broken multibyte char, skip */
 159                         goto fin;
 160                     }
 161                     /* not finised multibyte input (in meddle multibyte utf-8 char) */
 162                     goto fin;
 163                 }
 164                 else
 165                 {
 166                     if (g_unichar_isprint (g_utf8_get_char (edit->charbuf)))
 167                     {
 168                         c = convert_from_utf_to_current (edit->charbuf);
 169                         edit->charbuf[0] = '\0';
 170                         edit->charpoint = 0;
 171                         char_for_insertion = c;
 172                         goto fin;
 173                     }
 174                     /* unprinteble utf input, skip it */
 175                     edit->charbuf[0] = '\0';
 176                     edit->charpoint = 0;
 177                 }
 178             }
 179         }
 180 #endif /* HAVE_CHARSET */
 181     }
 182
 183     /* Commands specific to the key emulation */
 184     if (edit->extmod)
 185     {
 186         edit->extmod = FALSE;
 187         command = keybind_lookup_keymap_command (editor_x_map, x_key);
 188     }
 189     else
 190         command = keybind_lookup_keymap_command (editor_map, x_key);
 191
 192     if (command == CK_IgnoreKey)
 193         command = CK_InsertChar;
 194
 195   fin:
 196     *cmd = (int) command;       /* FIXME */
 197     *ch = char_for_insertion;
 198
 199     return (command == (unsigned long) CK_InsertChar && char_for_insertion == -1) ? 0 : 1;
 200 }
 201
 202 /* --------------------------------------------------------------------------------------------- */