src/selcodepage.c

   1 /*
   2    User interface for charset selection.
   3
   4    Copyright (C) 2001 Walery Studennikov <despair@sama.ru>
   5
   6    Copyright (C) 2011-2022
   7    Free Software Foundation, Inc.
   8
   9    Written by:
  10    Walery Studennikov <despair@sama.ru>, 2001
  11
  12    This file is part of the Midnight Commander.
  13
  14    The Midnight Commander is free software: you can redistribute it
  15    and/or modify it under the terms of the GNU General Public License as
  16    published by the Free Software Foundation, either version 3 of the License,
  17    or (at your option) any later version.
  18
  19    The Midnight Commander is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22    GNU General Public License for more details.
  23
  24    You should have received a copy of the GNU General Public License
  25    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  26  */
  27
  28 /** \file selcodepage.c
  29  *  \brief Source: user %interface for charset %selection
  30  */
  31
  32 #include <config.h>
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36
  37 #include "lib/global.h"
  38 #include "lib/widget.h"
  39 #include "lib/charsets.h"
  40
  41 #include "setup.h"
  42
  43 #include "selcodepage.h"
  44
  45 /*** global variables ****************************************************************************/
  46
  47 /*** file scope macro definitions ****************************************************************/
  48
  49 #define ENTRY_LEN 30
  50
  51 /*** file scope type declarations ****************************************************************/
  52
  53 /*** file scope variables ************************************************************************/
  54
  55 /*** file scope functions ************************************************************************/
  56 /* --------------------------------------------------------------------------------------------- */
  57
  58
  59 static unsigned char
  60 get_hotkey (int n)
  61 {
  62     return (n <= 9) ? '0' + n : 'a' + n - 10;
  63 }
  64
  65 /* --------------------------------------------------------------------------------------------- */
  66 /*** public functions ****************************************************************************/
  67 /* --------------------------------------------------------------------------------------------- */
  68
  69 /* Return value:
  70  *   -2 (SELECT_CHARSET_CANCEL)       : Cancel
  71  *   -1 (SELECT_CHARSET_OTHER_8BIT)   : "Other 8 bit"    if seldisplay == TRUE
  72  *   -1 (SELECT_CHARSET_NO_TRANSLATE) : "No translation" if seldisplay == FALSE
  73  *   >= 0                             : charset number
  74  */
  75 int
  76 select_charset (int center_y, int center_x, int current_charset, gboolean seldisplay)
  77 {
  78     size_t i;
  79     int listbox_result;
  80     char buffer[255];
  81
  82     /* Create listbox */
  83     Listbox *listbox = create_listbox_window_centered (center_y, center_x,
  84                                                        codepages->len + 1, ENTRY_LEN + 2,
  85                                                        _("Choose codepage"),
  86                                                        "[Codepages Translation]");
  87
  88     if (!seldisplay)
  89         LISTBOX_APPEND_TEXT (listbox, '-', _("-  < No translation >"), NULL, FALSE);
  90
  91     /* insert all the items found */
  92     for (i = 0; i < codepages->len; i++)
  93     {
  94         const char *name = ((codepage_desc *) g_ptr_array_index (codepages, i))->name;
  95         g_snprintf (buffer, sizeof (buffer), "%c  %s", get_hotkey (i), name);
  96         LISTBOX_APPEND_TEXT (listbox, get_hotkey (i), buffer, NULL, FALSE);
  97     }
  98     if (seldisplay)
  99     {
 100         unsigned char hotkey = get_hotkey (codepages->len);
 101         g_snprintf (buffer, sizeof (buffer), "%c  %s", hotkey, _("Other 8 bit"));
 102         LISTBOX_APPEND_TEXT (listbox, hotkey, buffer, NULL, FALSE);
 103     }
 104
 105     /* Select the default entry */
 106     i = (seldisplay)
 107         ? ((current_charset < 0) ? codepages->len : (size_t) current_charset)
 108         : ((size_t) current_charset + 1);
 109
 110     listbox_select_entry (listbox->list, i);
 111
 112     listbox_result = run_listbox (listbox);
 113
 114     if (listbox_result < 0)
 115     {
 116         /* Cancel dialog */
 117         return SELECT_CHARSET_CANCEL;
 118     }
 119     else
 120     {
 121         /* some charset has been selected */
 122         if (seldisplay)
 123         {
 124             /* charset list is finished with "Other 8 bit" item */
 125             return (listbox_result >= (int) codepages->len)
 126                 ? SELECT_CHARSET_OTHER_8BIT : listbox_result;
 127         }
 128         else
 129         {
 130             /* charset list is began with "-  < No translation >" item */
 131             return (listbox_result - 1);
 132         }
 133     }
 134 }
 135
 136
 137 /* --------------------------------------------------------------------------------------------- */
 138 /** Set codepage */
 139 gboolean
 140 do_set_codepage (int codepage)
 141 {
 142     char *errmsg;
 143     gboolean ret;
 144
 145     mc_global.source_codepage = codepage;
 146     errmsg = init_translation_table (codepage == SELECT_CHARSET_NO_TRANSLATE ?
 147                                      mc_global.display_codepage : mc_global.source_codepage,
 148                                      mc_global.display_codepage);
 149     ret = errmsg == NULL;
 150
 151     if (!ret)
 152     {
 153         message (D_ERROR, MSG_ERROR, "%s", errmsg);
 154         g_free (errmsg);
 155     }
 156
 157     return ret;
 158 }
 159
 160 /* --------------------------------------------------------------------------------------------- */
 161 /** Show menu selecting codepage */
 162
 163 gboolean
 164 do_select_codepage (void)
 165 {
 166     int r;
 167
 168     r = select_charset (-1, -1, default_source_codepage, FALSE);
 169     if (r == SELECT_CHARSET_CANCEL)
 170         return FALSE;
 171
 172     default_source_codepage = r;
 173     return do_set_codepage (default_source_codepage);
 174 }
 175
 176 /* --------------------------------------------------------------------------------------------- */