3 * Copyright © 2008 David Roden
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.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 package net.pterodactylus.jsite.i18n;
22 import java.awt.event.InputEvent;
23 import java.awt.event.KeyEvent;
24 import java.io.IOException;
25 import java.io.InputStream;
26 import java.lang.reflect.Field;
27 import java.text.MessageFormat;
28 import java.util.ArrayList;
29 import java.util.List;
30 import java.util.Locale;
31 import java.util.MissingResourceException;
32 import java.util.Properties;
33 import java.util.StringTokenizer;
34 import java.util.logging.Level;
35 import java.util.logging.Logger;
37 import javax.swing.KeyStroke;
39 import net.pterodactylus.util.io.Closer;
40 import net.pterodactylus.util.logging.Logging;
43 * Class that handles i18n.
45 * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
51 private static final Logger logger = Logging.getLogger(I18n.class.getName());
53 /** List of I18nables that are notified when the language changes. */
54 private static final List<I18nable> i18nables = new ArrayList<I18nable>();
56 /** The current locale. */
57 private static Locale currentLocale;
59 /** The default language. */
60 private static Properties defaultLanguage;
62 /** The current language. */
63 private static Properties currentLanguage;
66 defaultLanguage = new Properties();
67 InputStream inputStream = null;
69 inputStream = I18n.class.getResourceAsStream("jSite.properties");
70 if (inputStream != null) {
71 defaultLanguage.load(inputStream);
73 } catch (IOException e) {
74 /* something is fucked. */
76 setLocale(Locale.getDefault(), false);
80 * Returns the translated value for a key. The translated values may contain
81 * placeholders that are replaced with the given parameters.
87 * The parameters in case the translated value contains
89 * @return The translated message, or the key itself if no translation could
92 public static String get(String key, Object... parameters) {
94 value = currentLanguage.getProperty(key);
96 logger.log(Level.WARNING, "please fix “" + key + "”!", new Throwable());
97 /* TODO - replace with value when done! */
100 if ((parameters != null) && (parameters.length > 0)) {
101 return MessageFormat.format(value, parameters);
107 * Returns the keycode from the value of the given key. You can specify the
108 * constants in {@link KeyEvent} in the properties file, e.g. VK_S for the
109 * keycode ‘s’ when used for mnemonics.
112 * The key under which the keycode is stored
113 * @return The keycode
115 public static int getKey(String key) {
116 String value = currentLanguage.getProperty(key);
117 if ((value != null) && value.startsWith("VK_")) {
119 Field field = KeyEvent.class.getField(value);
120 return field.getInt(null);
121 } catch (SecurityException e) {
123 } catch (NoSuchFieldException e) {
125 } catch (IllegalArgumentException e) {
127 } catch (IllegalAccessException e) {
131 System.err.println("please fix “" + key + "”!");
132 return KeyEvent.VK_UNDEFINED;
136 * Returns a key stroke for use with swing accelerators.
139 * The key of the key stroke
140 * @return The key stroke, or <code>null</code> if no key stroke could be
141 * created from the translated value
143 public static KeyStroke getKeyStroke(String key) {
144 String value = currentLanguage.getProperty(key);
148 StringTokenizer keyTokens = new StringTokenizer(value, "+- ");
149 int modifierMask = 0;
150 while (keyTokens.hasMoreTokens()) {
151 String keyToken = keyTokens.nextToken();
152 if ("ctrl".equalsIgnoreCase(keyToken)) {
153 modifierMask |= InputEvent.CTRL_DOWN_MASK;
154 } else if ("alt".equalsIgnoreCase(keyToken)) {
155 modifierMask |= InputEvent.ALT_DOWN_MASK;
156 } else if ("shift".equalsIgnoreCase(keyToken)) {
157 modifierMask |= InputEvent.SHIFT_DOWN_MASK;
159 if (keyToken.startsWith("VK_")) {
161 Field field = KeyEvent.class.getField(keyToken);
162 return KeyStroke.getKeyStroke(field.getInt(null), modifierMask);
163 } catch (SecurityException e) {
165 } catch (NoSuchFieldException e) {
167 } catch (IllegalArgumentException e) {
169 } catch (IllegalAccessException e) {
173 return KeyStroke.getKeyStroke(keyToken.charAt(0), modifierMask);
180 * Sets the current locale.
183 * The new locale to use
185 public static void setLocale(Locale newLocale) {
186 setLocale(newLocale, true);
190 * Sets the current locale.
193 * The new locale to use
195 * <code>true</code> to notify registered {@link I18nable}s
196 * after the language was changed
198 private static void setLocale(Locale newLocale, boolean notify) {
199 currentLocale = newLocale;
200 InputStream inputStream = null;
202 currentLanguage = new Properties(defaultLanguage);
203 if (newLocale == Locale.ENGLISH) {
209 inputStream = I18n.class.getResourceAsStream("jSite_" + newLocale.getLanguage() + ".properties");
210 if (inputStream != null) {
211 currentLanguage.load(inputStream);
216 } catch (MissingResourceException mre1) {
217 currentLocale = Locale.ENGLISH;
218 } catch (IOException ioe1) {
219 currentLocale = Locale.ENGLISH;
221 Closer.close(inputStream);
226 * Returns the current locale.
228 * @return The current locale
230 public static Locale getLocale() {
231 return currentLocale;
235 * Finds all available locales.
237 * @return All available locales
239 public static List<Locale> findAvailableLanguages() {
240 List<Locale> availableLanguages = new ArrayList<Locale>();
241 availableLanguages.add(Locale.ENGLISH);
242 availableLanguages.add(Locale.GERMAN);
243 return availableLanguages;
247 * Registers the given I18nable to be updated when the language is changed.
250 * The i18nable to register
252 public static void registerI18nable(I18nable i18nable) {
253 i18nables.add(i18nable);
257 * Deregisters the given I18nable to be updated when the language is
261 * The i18nable to register
263 public static void deregisterI18nable(I18nable i18nable) {
264 i18nables.remove(i18nable);
272 * Notifies all registered {@link I18nable}s that the language was changed.
274 private static void notifyI18nables() {
275 for (I18nable i18nable: i18nables) {
276 i18nable.updateI18n();