ROX-Filer/src/i18n.c

   1 /*
   2  * $Id$
   3  *
   4  * ROX-Filer, filer for the ROX desktop project
   5  * Copyright (C) 2005, the ROX-Filer team.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <errno.h>
  27 #include <string.h>
  28
  29 #include "global.h"
  30
  31 #include "support.h"
  32 #include "choices.h"
  33 #include "options.h"
  34 #include "i18n.h"
  35 #include "gui_support.h"
  36 #include "main.h"
  37
  38 #define MESSAGE _("Note that you must save your choices "               \
  39                   "and restart the filer for the new language "         \
  40                   "setting to take full effect.")
  41
  42 char *current_lang = NULL;      /* Two-char country code, or NULL */
  43
  44 static Option o_translation;
  45
  46 static GtkWidget *i18n_message = NULL;
  47
  48 /* Static Prototypes */
  49 static void set_trans(const guchar *lang);
  50 static void trans_changed(void);
  51 static GList *build_i18n_message(Option *option, xmlNode *node, guchar *label);
  52
  53 /****************************************************************
  54  *                      EXTERNAL INTERFACE                      *
  55  ****************************************************************/
  56
  57
  58 /* Set things up for internationalisation */
  59 void i18n_init(void)
  60 {
  61         gtk_set_locale();
  62
  63         option_add_string(&o_translation, "i18n_translation", "From LANG");
  64         set_trans(o_translation.value);
  65         o_translation.has_changed = FALSE; /* Prevent warning about saving */
  66
  67         option_add_notify(trans_changed);
  68
  69         option_register_widget("i18n-message", build_i18n_message);
  70 }
  71
  72 /* These two stolen from dia :-).
  73  * Slight modification though: '>' means 'same as above' so that
  74  * if a translation is missing it doesn't muck up the whole menu structure!
  75  */
  76 GtkItemFactoryEntry *translate_entries(GtkItemFactoryEntry *entries, gint n)
  77 {
  78         guchar  *first = NULL, *second = NULL;  /* Previous menu, submenu */
  79         gint i;
  80         GtkItemFactoryEntry *ret;
  81
  82         ret = g_malloc(sizeof(GtkItemFactoryEntry) * n);
  83         for (i = 0; i < n; i++)
  84         {
  85                 const gchar     *from = entries[i].path;
  86                 gchar   *trans, *slash;
  87                 int     indent;
  88
  89                 if (from[0] == '>')
  90                 {
  91                         if (from[1] == '>')
  92                                 indent = 2;
  93                         else
  94                                 indent = 1;
  95                 }
  96                 else
  97                         indent = 0;
  98
  99                 if (from[indent])
 100                         from = _(from + indent);
 101                 else
 102                         from = "";
 103
 104                 if (indent == 0)
 105                         trans = g_strdup_printf("/%s", from);
 106                 else if (indent == 1)
 107                         trans = g_strdup_printf("/%s/%s", first, from);
 108                 else
 109                         trans = g_strdup_printf("/%s/%s/%s",
 110                                         first, second, from);
 111
 112                 ret[i].path = trans;
 113
 114                 g_free(first);
 115                 null_g_free(&second);
 116
 117                 trans++;
 118                 slash = strchr(trans, '/');
 119                 if (slash)
 120                 {
 121                         first = g_strndup(trans, slash - trans);
 122                         trans = slash + 1;
 123
 124                         slash = strchr(trans, '/');
 125                         if (slash)
 126                                 second = g_strndup(trans, slash - trans);
 127                         else
 128                                 second = g_strdup(trans);
 129                 }
 130                 else
 131                         first = g_strdup(trans);
 132
 133                 /* accelerator and item_type are not duped, only referenced */
 134                 ret[i].accelerator = entries[i].accelerator;
 135                 ret[i].callback = entries[i].callback;
 136                 ret[i].callback_action = entries[i].callback_action;
 137                 ret[i].item_type = entries[i].item_type;
 138                 ret[i].extra_data = entries[i].extra_data;
 139         }
 140
 141         g_free(first);
 142         g_free(second);
 143
 144         return ret;
 145 }
 146
 147 void free_translated_entries(GtkItemFactoryEntry *entries, gint n)
 148 {
 149         gint i;
 150
 151         for (i=0; i<n; i++)
 152                 g_free(entries[i].path);
 153         g_free(entries);
 154 }
 155
 156
 157 /****************************************************************
 158  *                      INTERNAL FUNCTIONS                      *
 159  ****************************************************************/
 160
 161 static void trans_changed(void)
 162 {
 163         if (!o_translation.has_changed)
 164                 return;
 165
 166         set_trans(o_translation.value);
 167
 168         if (i18n_message)
 169                 gtk_label_set_text(GTK_LABEL(i18n_message), MESSAGE);
 170 }
 171
 172 /* Load the 'Messages/<name>.gmo' translation.
 173  * Special values 'None' and 'From LANG' are also allowed.
 174  */
 175 static void set_trans(const guchar *lang)
 176 {
 177         guchar  *path;
 178         gchar   *lang2 = NULL;
 179
 180         g_return_if_fail(lang != NULL);
 181
 182         rox_clear_translation();
 183
 184         null_g_free(&current_lang);
 185
 186         if (strcmp(lang, "None") == 0)
 187                 return;
 188         else if (strcmp(lang, "From LANG") == 0)
 189         {
 190                 lang = getenv("LANG");
 191                 if (!lang)
 192                         return;
 193                 /* Extract the language code from the locale name.
 194                  * language[_territory][.codeset][@modifier]
 195                  */
 196                 if (lang[0] != '\0' && lang[1] != '\0'
 197                     && (lang[2] == '_' || lang[2] == '.' || lang[2] == '@'))
 198                         lang2 = g_strndup((gchar *) lang, 2);
 199         }
 200
 201         current_lang = lang2 ? lang2 : g_strdup(lang);
 202
 203         path = g_strdup_printf("%s/Messages/%s.gmo", app_dir, current_lang);
 204         if (file_exists(path))
 205                 rox_add_translations(path);
 206         g_free(path);
 207 }
 208
 209 static GList *build_i18n_message(Option *option, xmlNode *node, guchar *label)
 210 {
 211         GtkWidget *hbox, *image, *align;
 212
 213         g_return_val_if_fail(option == NULL, NULL);
 214         g_return_val_if_fail(label == NULL, NULL);
 215         g_return_val_if_fail(i18n_message == NULL, NULL);
 216
 217         i18n_message = gtk_label_new(MESSAGE);
 218         g_signal_connect(i18n_message, "destroy",
 219                         G_CALLBACK(gtk_widget_destroyed), &i18n_message);
 220
 221         gtk_misc_set_alignment(GTK_MISC(i18n_message), 0, 0.5);
 222         gtk_label_set_justify(GTK_LABEL(i18n_message), GTK_JUSTIFY_LEFT);
 223         gtk_label_set_line_wrap(GTK_LABEL(i18n_message), TRUE);
 224
 225         hbox = gtk_hbox_new(FALSE, 4);
 226         image = gtk_image_new_from_stock(GTK_STOCK_DIALOG_INFO,
 227                         GTK_ICON_SIZE_BUTTON);
 228         align = gtk_alignment_new(0, 0, 0, 0);
 229
 230         gtk_container_add(GTK_CONTAINER(align), image);
 231         gtk_box_pack_start(GTK_BOX(hbox), align, FALSE, TRUE, 0);
 232         gtk_box_pack_start(GTK_BOX(hbox), i18n_message, FALSE, TRUE, 0);
 233
 234         return g_list_append(NULL, hbox);
 235 }