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 30
  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 /* Return value:
  52  *   -2 (SELECT_CHARSET_CANCEL)       : Cancel
  53  *   -1 (SELECT_CHARSET_OTHER_8BIT)   : "Other 8 bit"    if seldisplay == TRUE
  54  *   -1 (SELECT_CHARSET_NO_TRANSLATE) : "No translation" if seldisplay == FALSE
  55  *   >= 0                             : charset number
  56  */
  57 int
  58 select_charset (int center_y, int center_x, int current_charset, gboolean seldisplay)
  59 {
  60     int i;
  61     char buffer[255];
  62
  63     /* Create listbox */
  64     Listbox *listbox = create_listbox_window_centered (center_y, center_x,
  65                                               n_codepages + 1, ENTRY_LEN + 2,
  66                                               _("Choose codepage"),
  67                                               "[Codepages Translation]");
  68
  69     if (!seldisplay)
  70         LISTBOX_APPEND_TEXT (listbox, '-', _("-  < No translation >"),
  71                              NULL);
  72
  73     /* insert all the items found */
  74     for (i = 0; i < n_codepages; i++) {
  75         char *name = codepages[i].name;
  76         g_snprintf (buffer, sizeof (buffer), "%c  %s", get_hotkey (i),
  77                     name);
  78         LISTBOX_APPEND_TEXT (listbox, get_hotkey (i), buffer, NULL);
  79     }
  80     if (seldisplay) {
  81         g_snprintf (buffer, sizeof (buffer), "%c  %s",
  82                     get_hotkey (n_codepages), _("Other 8 bit"));
  83         LISTBOX_APPEND_TEXT (listbox, get_hotkey (n_codepages), buffer,
  84                              NULL);
  85     }
  86
  87     /* Select the default entry */
  88     i = (seldisplay)
  89         ? ((current_charset < 0) ? n_codepages : current_charset)
  90         : (current_charset + 1);
  91
  92     listbox_select_by_number (listbox->list, i);
  93
  94     i = run_listbox (listbox);
  95
  96     if (i < 0) {
  97         /* Cancel dialog */
  98         return SELECT_CHARSET_CANCEL;
  99     } else {
 100         /* some charset has been selected */
 101         if (seldisplay) {
 102             /* charset list is finished with "Other 8 bit" item */
 103             return (i >= n_codepages) ? SELECT_CHARSET_OTHER_8BIT : i;
 104         } else {
 105             /* charset list is began with "-  < No translation >" item */
 106             return (i - 1);
 107         }
 108     }
 109 }
 110
 111 gboolean
 112 do_select_codepage (void)
 113 {
 114     const char *errmsg = NULL;
 115     int r;
 116
 117     r = select_charset (-1, -1, source_codepage, FALSE);
 118     if (r == SELECT_CHARSET_CANCEL)
 119         return FALSE;
 120
 121     source_codepage = r;
 122
 123     errmsg = init_translation_table (r == SELECT_CHARSET_NO_TRANSLATE ?
 124                                         display_codepage : source_codepage,
 125                                         display_codepage);
 126     if (errmsg != NULL)
 127         message (D_ERROR, MSG_ERROR, "%s", errmsg);
 128
 129     return (errmsg == NULL);
 130 }
 131
 132 #endif                          /* HAVE_CHARSET */