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"        /* edit->macro_i */
  51 #include "editcmd_dialogs.h"
  52
  53 #include "src/keybind-defaults.h"       /* keybind_lookup_keymap_command() */
  54 #include "src/main.h"           /* display_codepage */
  55
  56 /*** global variables ****************************************************************************/
  57
  58 /*** file scope macro definitions ****************************************************************/
  59
  60 /*** file scope type declarations ****************************************************************/
  61
  62 /*** file scope variables ************************************************************************/
  63
  64 /*** file scope functions ************************************************************************/
  65 /* --------------------------------------------------------------------------------------------- */
  66
  67 /* --------------------------------------------------------------------------------------------- */
  68 /*** public functions ****************************************************************************/
  69 /* --------------------------------------------------------------------------------------------- */
  70
  71 /*
  72  * Translate the keycode into either 'command' or 'char_for_insertion'.
  73  * 'command' is one of the editor commands from cmddef.h.
  74  */
  75 int
  76 edit_translate_key (WEdit * edit, long x_key, int *cmd, int *ch)
  77 {
  78     unsigned long command = (unsigned long) CK_Insert_Char;
  79     int char_for_insertion = -1;
  80     int c;
  81
  82     /* an ordinary insertable character */
  83     if (x_key < 256)
  84     {
  85 #ifdef HAVE_CHARSET
  86         if (edit->charpoint >= 4)
  87         {
  88             edit->charpoint = 0;
  89             edit->charbuf[edit->charpoint] = '\0';
  90         }
  91         if (edit->charpoint < 4)
  92         {
  93             edit->charbuf[edit->charpoint++] = x_key;
  94             edit->charbuf[edit->charpoint] = '\0';
  95         }
  96
  97         /* input from 8-bit locale */
  98         if (!utf8_display)
  99         {
 100             /* source in 8-bit codeset */
 101             if (!edit->utf8)
 102             {
 103 #endif /* HAVE_CHARSET */
 104                 c = convert_from_input_c (x_key);
 105                 if (is_printable (c))
 106                 {
 107                     char_for_insertion = c;
 108                     goto fin;
 109                 }
 110 #ifdef HAVE_CHARSET
 111             }
 112             else
 113             {
 114                 c = convert_from_input_c (x_key);
 115                 if (is_printable (c))
 116                 {
 117                     char_for_insertion = convert_from_8bit_to_utf_c2 ((unsigned char) x_key);
 118                     goto fin;
 119                 }
 120             }
 121             /* UTF-8 locale */
 122         }
 123         else
 124         {
 125             /* source in UTF-8 codeset */
 126             if (edit->utf8)
 127             {
 128                 int res = str_is_valid_char (edit->charbuf, edit->charpoint);
 129                 if (res < 0)
 130                 {
 131                     if (res != -2)
 132                     {
 133                         edit->charpoint = 0;    /* broken multibyte char, skip */
 134                         goto fin;
 135                     }
 136                     char_for_insertion = x_key;
 137                     goto fin;
 138                 }
 139                 else
 140                 {
 141                     edit->charbuf[edit->charpoint] = '\0';
 142                     edit->charpoint = 0;
 143                     if (g_unichar_isprint (g_utf8_get_char (edit->charbuf)))
 144                     {
 145                         char_for_insertion = x_key;
 146                         goto fin;
 147                     }
 148                 }
 149
 150                 /* 8-bit source */
 151             }
 152             else
 153             {
 154                 int res = str_is_valid_char (edit->charbuf, edit->charpoint);
 155                 if (res < 0)
 156                 {
 157                     if (res != -2)
 158                     {
 159                         edit->charpoint = 0;    /* broken multibyte char, skip */
 160                         goto fin;
 161                     }
 162                     /* not finised multibyte input (in meddle multibyte utf-8 char) */
 163                     goto fin;
 164                 }
 165                 else
 166                 {
 167                     if (g_unichar_isprint (g_utf8_get_char (edit->charbuf)))
 168                     {
 169                         c = convert_from_utf_to_current (edit->charbuf);
 170                         edit->charbuf[0] = '\0';
 171                         edit->charpoint = 0;
 172                         char_for_insertion = c;
 173                         goto fin;
 174                     }
 175                     /* unprinteble utf input, skip it */
 176                     edit->charbuf[0] = '\0';
 177                     edit->charpoint = 0;
 178                 }
 179             }
 180         }
 181 #endif /* HAVE_CHARSET */
 182     }
 183
 184     /* Commands specific to the key emulation */
 185     if (edit->extmod)
 186     {
 187         edit->extmod = 0;
 188         command = keybind_lookup_keymap_command (editor_x_map, x_key);
 189     }
 190     else
 191         command = keybind_lookup_keymap_command (editor_map, x_key);
 192
 193     if (command == CK_Ignore_Key)
 194         command = CK_Insert_Char;
 195
 196   fin:
 197     *cmd = (int) command;       /* FIXME */
 198     *ch = char_for_insertion;
 199
 200     return (command == (unsigned long) CK_Insert_Char && char_for_insertion == -1) ? 0 : 1;
 201 }
 202
 203 /* --------------------------------------------------------------------------------------------- */