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 "lib/global.h"
  32 #include "lib/widget.h"
  33 #include "lib/charsets.h"
  34
  35 #include "main.h"
  36
  37 #include "selcodepage.h"
  38
  39 /*** global variables ****************************************************************************/
  40
  41 /*** file scope macro definitions ****************************************************************/
  42
  43 #define ENTRY_LEN 30
  44
  45 /*** file scope type declarations ****************************************************************/
  46
  47 /*** file scope variables ************************************************************************/
  48
  49 /*** file scope functions ************************************************************************/
  50 /* --------------------------------------------------------------------------------------------- */
  51
  52
  53 static unsigned char
  54 get_hotkey (int n)
  55 {
  56     return (n <= 9) ? '0' + n : 'a' + n - 10;
  57 }
  58
  59 /* --------------------------------------------------------------------------------------------- */
  60 /*** public functions ****************************************************************************/
  61 /* --------------------------------------------------------------------------------------------- */
  62
  63 /* Return value:
  64  *   -2 (SELECT_CHARSET_CANCEL)       : Cancel
  65  *   -1 (SELECT_CHARSET_OTHER_8BIT)   : "Other 8 bit"    if seldisplay == TRUE
  66  *   -1 (SELECT_CHARSET_NO_TRANSLATE) : "No translation" if seldisplay == FALSE
  67  *   >= 0                             : charset number
  68  */
  69 int
  70 select_charset (int center_y, int center_x, int current_charset, gboolean seldisplay)
  71 {
  72     size_t i;
  73     int listbox_result;
  74     char buffer[255];
  75
  76     /* Create listbox */
  77     Listbox *listbox = create_listbox_window_centered (center_y, center_x,
  78                                                        codepages->len + 1, ENTRY_LEN + 2,
  79                                                        _("Choose codepage"),
  80                                                        "[Codepages Translation]");
  81
  82     if (!seldisplay)
  83         LISTBOX_APPEND_TEXT (listbox, '-', _("-  < No translation >"), NULL);
  84
  85     /* insert all the items found */
  86     for (i = 0; i < codepages->len; i++)
  87     {
  88         const char *name = ((codepage_desc *) g_ptr_array_index (codepages, i))->name;
  89         g_snprintf (buffer, sizeof (buffer), "%c  %s", get_hotkey (i), name);
  90         LISTBOX_APPEND_TEXT (listbox, get_hotkey (i), buffer, NULL);
  91     }
  92     if (seldisplay)
  93     {
  94         unsigned char hotkey = get_hotkey (codepages->len);
  95         g_snprintf (buffer, sizeof (buffer), "%c  %s", hotkey, _("Other 8 bit"));
  96         LISTBOX_APPEND_TEXT (listbox, hotkey, buffer, NULL);
  97     }
  98
  99     /* Select the default entry */
 100     i = (seldisplay)
 101         ? ((current_charset < 0) ? codepages->len : (size_t) current_charset)
 102         : ((size_t) current_charset + 1);
 103
 104     listbox_select_entry (listbox->list, i);
 105
 106     listbox_result = run_listbox (listbox);
 107
 108     if (listbox_result < 0)
 109     {
 110         /* Cancel dialog */
 111         return SELECT_CHARSET_CANCEL;
 112     }
 113     else
 114     {
 115         /* some charset has been selected */
 116         if (seldisplay)
 117         {
 118             /* charset list is finished with "Other 8 bit" item */
 119             return (listbox_result >= (int) codepages->len)
 120                 ? SELECT_CHARSET_OTHER_8BIT : listbox_result;
 121         }
 122         else
 123         {
 124             /* charset list is began with "-  < No translation >" item */
 125             return (listbox_result - 1);
 126         }
 127     }
 128 }
 129
 130
 131 /* --------------------------------------------------------------------------------------------- */
 132 /** Set codepage */
 133 gboolean
 134 do_set_codepage (int codepage)
 135 {
 136     char *errmsg;
 137     gboolean ret;
 138
 139     source_codepage = codepage;
 140     errmsg = init_translation_table (codepage == SELECT_CHARSET_NO_TRANSLATE ?
 141                                      display_codepage : source_codepage, display_codepage);
 142     ret = errmsg == NULL;
 143
 144     if (!ret)
 145     {
 146         message (D_ERROR, MSG_ERROR, "%s", errmsg);
 147         g_free (errmsg);
 148     }
 149
 150     return ret;
 151 }
 152
 153 /* --------------------------------------------------------------------------------------------- */
 154 /** Show menu selecting codepage */
 155
 156 gboolean
 157 do_select_codepage (void)
 158 {
 159     int r;
 160
 161     r = select_charset (-1, -1, default_source_codepage, FALSE);
 162     if (r == SELECT_CHARSET_CANCEL)
 163         return FALSE;
 164
 165     default_source_codepage = r;
 166     return do_set_codepage (default_source_codepage);
 167 }
 168
 169 /* --------------------------------------------------------------------------------------------- */
 170
 171 #endif /* HAVE_CHARSET */