root/src/selcodepage.c

/*   */

DEFINITIONS

1. get_hotkey
2. select_charset
3. do_set_codepage
4. do_select_codepage

   1 /*
   2    User interface for charset selection.
   3 
   4    Copyright (C) 2001 Walery Studennikov <despair@sama.ru>
   5 
   6    Copyright (C) 2011-2025
   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 <https://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 /*** forward declarations (file scope functions) *************************************************/
  54 
  55 /*** file scope variables ************************************************************************/
  56 
  57 /* --------------------------------------------------------------------------------------------- */
  58 /*** file scope functions ************************************************************************/
  59 /* --------------------------------------------------------------------------------------------- */
  60 
  61 static unsigned char
  62 get_hotkey (int n)
     /*   */
  63 {
  64     return (n <= 9) ? '0' + n : 'a' + n - 10;
  65 }
  66 
  67 /* --------------------------------------------------------------------------------------------- */
  68 /*** public functions ****************************************************************************/
  69 /* --------------------------------------------------------------------------------------------- */
  70 
  71 /* Return value:
  72  *   -2 (SELECT_CHARSET_CANCEL)       : Cancel
  73  *   -1 (SELECT_CHARSET_OTHER_8BIT)   : "Other 8 bit"    if seldisplay == TRUE
  74  *   -1 (SELECT_CHARSET_NO_TRANSLATE) : "No translation" if seldisplay == FALSE
  75  *   >= 0                             : charset number
  76  */
  77 int
  78 select_charset (int center_y, int center_x, int current_charset, gboolean seldisplay)
     /*   */
  79 {
  80     Listbox *listbox;
  81     size_t i;
  82     int listbox_result;
  83     char buffer[255];
  84 
  85     // Create listbox
  86     listbox = listbox_window_centered_new (center_y, center_x, codepages->len + 1, ENTRY_LEN + 2,
  87                                            _ ("Choose codepage"), "[Codepages Translation]");
  88 
  89     if (!seldisplay)
  90         LISTBOX_APPEND_TEXT (listbox, '-', _ ("-  < No translation >"), NULL, FALSE);
  91 
  92     // insert all the items found
  93     for (i = 0; i < codepages->len; i++)
  94     {
  95         const char *name;
  96 
  97         name = ((codepage_desc *) g_ptr_array_index (codepages, i))->name;
  98         g_snprintf (buffer, sizeof (buffer), "%c  %s", get_hotkey (i), name);
  99         LISTBOX_APPEND_TEXT (listbox, get_hotkey (i), buffer, NULL, FALSE);
 100     }
 101 
 102     if (seldisplay)
 103     {
 104         unsigned char hotkey;
 105 
 106         hotkey = get_hotkey (codepages->len);
 107         g_snprintf (buffer, sizeof (buffer), "%c  %s", hotkey, _ ("Other 8 bit"));
 108         LISTBOX_APPEND_TEXT (listbox, hotkey, buffer, NULL, FALSE);
 109     }
 110 
 111     // Select the default entry
 112     i = seldisplay ? ((current_charset < 0) ? codepages->len : (size_t) current_charset)
 113                    : ((size_t) current_charset + 1);
 114 
 115     listbox_set_current (listbox->list, i);
 116 
 117     listbox_result = listbox_run (listbox);
 118 
 119     if (listbox_result < 0)
 120         // Cancel dialog
 121         return SELECT_CHARSET_CANCEL;
 122 
 123     // some charset has been selected
 124     if (seldisplay)
 125         // charset list is finished with "Other 8 bit" item
 126         return (listbox_result >= (int) codepages->len) ? SELECT_CHARSET_OTHER_8BIT
 127                                                         : listbox_result;
 128 
 129     // charset list is began with "-  < No translation >" item
 130     return (listbox_result - 1);
 131 }
 132 
 133 /* --------------------------------------------------------------------------------------------- */
 134 
 135 /** Set codepage */
 136 gboolean
 137 do_set_codepage (int codepage)
     /*   */
 138 {
 139     char *errmsg;
 140     gboolean ret;
 141 
 142     mc_global.source_codepage = codepage;
 143     errmsg =
 144         init_translation_table (codepage == SELECT_CHARSET_NO_TRANSLATE ? mc_global.display_codepage
 145                                                                         : mc_global.source_codepage,
 146                                 mc_global.display_codepage);
 147     ret = errmsg == NULL;
 148 
 149     if (!ret)
 150     {
 151         message (D_ERROR, MSG_ERROR, "%s", errmsg);
 152         g_free (errmsg);
 153     }
 154 
 155     return ret;
 156 }
 157 
 158 /* --------------------------------------------------------------------------------------------- */
 159 
 160 /** Show menu selecting codepage */
 161 gboolean
 162 do_select_codepage (void)
     /*   */
 163 {
 164     int r;
 165 
 166     r = select_charset (-1, -1, default_source_codepage, FALSE);
 167     if (r == SELECT_CHARSET_CANCEL)
 168         return FALSE;
 169 
 170     default_source_codepage = r;
 171     return do_set_codepage (default_source_codepage);
 172 }
 173 
 174 /* --------------------------------------------------------------------------------------------- */

/*   */