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 "dlg.h"
  28 #include "dialog.h"
  29 #include "widget.h"
  30 #include "wtools.h"
  31 #include "charsets.h"
  32 #include "selcodepage.h"
  33 #include "main.h"
  34
  35 #define ENTRY_LEN 35
  36
  37 /* Numbers of (file I/O) and (input/display) codepages. -1 if not selected */
  38 int source_codepage = -1;
  39 int display_codepage = -1;
  40
  41 static unsigned char
  42 get_hotkey (int n)
  43 {
  44     return (n <= 9) ? '0' + n : 'a' + n - 10;
  45 }
  46
  47 int
  48 select_charset (int current_charset, int seldisplay)
  49 {
  50     int i, menu_lines = n_codepages + 1;
  51     char buffer[255];
  52
  53     /* Create listbox */
  54     Listbox *listbox = create_listbox_window (ENTRY_LEN + 2, menu_lines,
  55                                               _(" Choose input codepage "),
  56                                               "[Codepages Translation]");
  57
  58     if (!seldisplay)
  59         LISTBOX_APPEND_TEXT (listbox, '-', _("-  < No translation >"),
  60                              NULL);
  61
  62     /* insert all the items found */
  63     for (i = 0; i < n_codepages; i++) {
  64         char *name = codepages[i].name;
  65         g_snprintf (buffer, sizeof (buffer), "%c  %s", get_hotkey (i),
  66                     name);
  67         LISTBOX_APPEND_TEXT (listbox, get_hotkey (i), buffer, NULL);
  68     }
  69     if (seldisplay) {
  70         g_snprintf (buffer, sizeof (buffer), "%c  %s",
  71                     get_hotkey (n_codepages), _("Other 8 bit"));
  72         LISTBOX_APPEND_TEXT (listbox, get_hotkey (n_codepages), buffer,
  73                              NULL);
  74     }
  75
  76     /* Select the default entry */
  77     i = (seldisplay)
  78         ? ((current_charset < 0) ? n_codepages : current_charset)
  79         : (current_charset + 1);
  80
  81     listbox_select_by_number (listbox->list, i);
  82
  83     i = run_listbox (listbox);
  84
  85     return (seldisplay) ? ((i >= n_codepages) ? -1 : i)
  86         : (i - 1);
  87 }
  88
  89 /* Helper functions for codepages support */
  90
  91
  92 int
  93 do_select_codepage (void)
  94 {
  95     char *errmsg;
  96
  97     if (display_codepage > 0) {
  98         source_codepage = select_charset (source_codepage, 0);
  99         errmsg =
 100             init_translation_table (source_codepage, display_codepage);
 101         if (errmsg) {
 102             message (1, MSG_ERROR, "%s", errmsg);
 103             return -1;
 104         }
 105     } else {
 106         message (1, _("Warning"),
 107                  _("To use this feature select your codepage in\n"
 108                    "Setup / Display Bits dialog!\n"
 109                    "Do not forget to save options."));
 110         return -1;
 111     }
 112     return 0;
 113 }
 114
 115 #endif                          /* HAVE_CHARSET */