src/selcodepage.c

   1 /* User interface for charset selection.
   2
   3    Copyright (C) 2001 Walery Studennikov <despair@sama.ru>
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <config.h>
  21
  22 #ifdef HAVE_CHARSET
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25
  26 #include "global.h"
  27 #include "dialog.h"
  28 #include "widget.h"
  29 #include "wtools.h"
  30 #include "charsets.h"
  31 #include "selcodepage.h"
  32 #include "main.h"
  33
  34 #define ENTRY_LEN 35
  35
  36 /* Numbers of (file I/O) and (input/display) codepages. -1 if not selected */
  37 int source_codepage = -1;
  38 int display_codepage = -1;
  39
  40 static unsigned char
  41 get_hotkey (int n)
  42 {
  43     return (n <= 9) ? '0' + n : 'a' + n - 10;
  44 }
  45
  46 int
  47 select_charset (int current_charset, int seldisplay)
  48 {
  49     int i, menu_lines = n_codepages + 1;
  50     char buffer[255];
  51
  52     /* Create listbox */
  53     Listbox *listbox = create_listbox_window (ENTRY_LEN + 2, menu_lines,
  54                                               _(" Choose input codepage "),
  55                                               "[Codepages Translation]");
  56
  57     if (!seldisplay)
  58         LISTBOX_APPEND_TEXT (listbox, '-', _("-  < No translation >"),
  59                              NULL);
  60
  61     /* insert all the items found */
  62     for (i = 0; i < n_codepages; i++) {
  63         char *name = codepages[i].name;
  64         g_snprintf (buffer, sizeof (buffer), "%c  %s", get_hotkey (i),
  65                     name);
  66         LISTBOX_APPEND_TEXT (listbox, get_hotkey (i), buffer, NULL);
  67     }
  68     if (seldisplay) {
  69         g_snprintf (buffer, sizeof (buffer), "%c  %s",
  70                     get_hotkey (n_codepages), _("Other 8 bit"));
  71         LISTBOX_APPEND_TEXT (listbox, get_hotkey (n_codepages), buffer,
  72                              NULL);
  73     }
  74
  75     /* Select the default entry */
  76     i = (seldisplay)
  77         ? ((current_charset < 0) ? n_codepages : current_charset)
  78         : (current_charset + 1);
  79
  80     listbox_select_by_number (listbox->list, i);
  81
  82     i = run_listbox (listbox);
  83
  84     return (seldisplay) ? ((i >= n_codepages) ? -1 : i)
  85         : (i - 1);
  86 }
  87
  88 /* Helper functions for codepages support */
  89
  90
  91 int
  92 do_select_codepage (void)
  93 {
  94     char *errmsg;
  95
  96     if (display_codepage > 0) {
  97         source_codepage = select_charset (source_codepage, 0);
  98         errmsg =
  99             init_translation_table (source_codepage, display_codepage);
 100         if (errmsg) {
 101             message (1, MSG_ERROR, "%s", errmsg);
 102             return -1;
 103         }
 104     } else {
 105         message (1, _("Warning"),
 106                  _("To use this feature select your codepage in\n"
 107                    "Setup / Display Bits dialog!\n"
 108                    "Do not forget to save options."));
 109         return -1;
 110     }
 111     return 0;
 112 }
 113
 114 #endif                          /* HAVE_CHARSET */