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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 /** \file selcodepage.c
  21  *  \brief Source: user %interface for charset %selection
  22  */
  23
  24 #include <config.h>
  25
  26 #ifdef HAVE_CHARSET
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30
  31 #include "global.h"
  32 #include "dialog.h"
  33 #include "widget.h"
  34 #include "wtools.h"
  35 #include "charsets.h"
  36 #include "selcodepage.h"
  37 #include "main.h"
  38
  39 #define ENTRY_LEN 35
  40
  41 /* Numbers of (file I/O) and (input/display) codepages. -1 if not selected */
  42 int source_codepage = -1;
  43 int display_codepage = -1;
  44
  45 static unsigned char
  46 get_hotkey (int n)
  47 {
  48     return (n <= 9) ? '0' + n : 'a' + n - 10;
  49 }
  50
  51 int
  52 select_charset (int current_charset, int seldisplay)
  53 {
  54     int i, menu_lines = n_codepages + 1;
  55     char buffer[255];
  56
  57     /* Create listbox */
  58     Listbox *listbox = create_listbox_window (ENTRY_LEN + 2, menu_lines,
  59                                               _(" Choose input codepage "),
  60                                               "[Codepages Translation]");
  61
  62     if (!seldisplay)
  63         LISTBOX_APPEND_TEXT (listbox, '-', _("-  < No translation >"),
  64                              NULL);
  65
  66     /* insert all the items found */
  67     for (i = 0; i < n_codepages; i++) {
  68         char *name = codepages[i].name;
  69         g_snprintf (buffer, sizeof (buffer), "%c  %s", get_hotkey (i),
  70                     name);
  71         LISTBOX_APPEND_TEXT (listbox, get_hotkey (i), buffer, NULL);
  72     }
  73     if (seldisplay) {
  74         g_snprintf (buffer, sizeof (buffer), "%c  %s",
  75                     get_hotkey (n_codepages), _("Other 8 bit"));
  76         LISTBOX_APPEND_TEXT (listbox, get_hotkey (n_codepages), buffer,
  77                              NULL);
  78     }
  79
  80     /* Select the default entry */
  81     i = (seldisplay)
  82         ? ((current_charset < 0) ? n_codepages : current_charset)
  83         : (current_charset + 1);
  84
  85     listbox_select_by_number (listbox->list, i);
  86
  87     i = run_listbox (listbox);
  88
  89     return (seldisplay) ? ((i >= n_codepages) ? -1 : i)
  90         : (i - 1);
  91 }
  92
  93 /* Helper functions for codepages support */
  94
  95
  96 int
  97 do_select_codepage (void)
  98 {
  99     const char *errmsg;
 100
 101     if (display_codepage > 0) {
 102         source_codepage = select_charset (source_codepage, 0);
 103         errmsg =
 104             init_translation_table (source_codepage, display_codepage);
 105         if (errmsg) {
 106             message (D_ERROR, MSG_ERROR, "%s", errmsg);
 107             return -1;
 108         }
 109     } else {
 110         message (D_ERROR, _("Warning"),
 111                  _("To use this feature select your codepage in\n"
 112                    "Setup / Display Bits dialog!\n"
 113                    "Do not forget to save options."));
 114         return -1;
 115     }
 116     return 0;
 117 }
 118
 119 #endif                          /* HAVE_CHARSET */