+/*
+ * jSite2 - I18n.java -
+ * Copyright © 2008 David Roden
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+package net.pterodactylus.util.i18n;
+
+import java.awt.event.InputEvent;
+import java.awt.event.KeyEvent;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.Field;
+import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.MissingResourceException;
+import java.util.Properties;
+import java.util.StringTokenizer;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.swing.KeyStroke;
+
+import net.pterodactylus.util.logging.Logging;
+import de.ina.util.io.Closer;
+
+/**
+ * Class that handles i18n.
+ *
+ * @author David ‘Bombe’ Roden <bombe@freenetproject.org>
+ */
+public class I18n {
+
+ /** Logger. */
+ private static final Logger logger = Logging.getLogger(I18n.class.getName());
+
+ /** List of I18nables that are notified when the language changes. */
+ private static final List<I18nable> i18nables = new ArrayList<I18nable>();
+
+ /** The current locale. */
+ private static Locale currentLocale;
+
+ /** The default language. */
+ private static Properties defaultLanguage;
+
+ /** The current language. */
+ private static Properties currentLanguage;
+
+ static {
+ defaultLanguage = new Properties();
+ InputStream inputStream = null;
+ try {
+ inputStream = I18n.class.getResourceAsStream("jkeytool.properties");
+ if (inputStream != null) {
+ defaultLanguage.load(inputStream);
+ }
+ } catch (IOException e) {
+ /* something is fucked. */
+ }
+ setLocale(Locale.getDefault(), false);
+ }
+
+ /**
+ * Returns the translated value for a key. The translated values may contain
+ * placeholders that are replaced with the given parameters.
+ *
+ * @see MessageFormat
+ * @param key
+ * The key to get
+ * @param parameters
+ * The parameters in case the translated value contains
+ * placeholders
+ * @return The translated message, or the key itself if no translation could
+ * be found
+ */
+ public static String get(String key, Object... parameters) {
+ String value = null;
+ value = currentLanguage.getProperty(key);
+ if (value == null) {
+ logger.log(Level.WARNING, "please fix “" + key + "”!", new Throwable());
+ /* TODO - replace with value when done! */
+ return null;
+ }
+ if ((parameters != null) && (parameters.length > 0)) {
+ return MessageFormat.format(value, parameters);
+ }
+ return value;
+ }
+
+ /**
+ * Returns the keycode from the value of the given key. You can specify the
+ * constants in {@link KeyEvent} in the properties file, e.g. VK_S for the
+ * keycode ‘s’ when used for mnemonics.
+ *
+ * @param key
+ * The key under which the keycode is stored
+ * @return The keycode
+ */
+ public static int getKey(String key) {
+ String value = currentLanguage.getProperty(key);
+ if ((value != null) && value.startsWith("VK_")) {
+ try {
+ Field field = KeyEvent.class.getField(value);
+ return field.getInt(null);
+ } catch (SecurityException e) {
+ /* ignore. */
+ } catch (NoSuchFieldException e) {
+ /* ignore. */
+ } catch (IllegalArgumentException e) {
+ /* ignore. */
+ } catch (IllegalAccessException e) {
+ /* ignore. */
+ }
+ }
+ System.err.println("please fix “" + key + "”!");
+ return KeyEvent.VK_UNDEFINED;
+ }
+
+ /**
+ * Returns a key stroke for use with swing accelerators.
+ *
+ * @param key
+ * The key of the key stroke
+ * @return The key stroke, or <code>null</code> if no key stroke could be
+ * created from the translated value
+ */
+ public static KeyStroke getKeyStroke(String key) {
+ String value = currentLanguage.getProperty(key);
+ if (value == null) {
+ return null;
+ }
+ StringTokenizer keyTokens = new StringTokenizer(value, "+- ");
+ int modifierMask = 0;
+ while (keyTokens.hasMoreTokens()) {
+ String keyToken = keyTokens.nextToken();
+ if ("ctrl".equalsIgnoreCase(keyToken)) {
+ modifierMask |= InputEvent.CTRL_DOWN_MASK;
+ } else if ("alt".equalsIgnoreCase(keyToken)) {
+ modifierMask |= InputEvent.ALT_DOWN_MASK;
+ } else if ("shift".equalsIgnoreCase(keyToken)) {
+ modifierMask |= InputEvent.SHIFT_DOWN_MASK;
+ } else {
+ if (keyToken.startsWith("VK_")) {
+ if (keyToken.equals("VK_UNDEFINED")) {
+ return null;
+ }
+ try {
+ Field field = KeyEvent.class.getField(keyToken);
+ return KeyStroke.getKeyStroke(field.getInt(null), modifierMask);
+ } catch (SecurityException e) {
+ /* ignore. */
+ } catch (NoSuchFieldException e) {
+ /* ignore. */
+ } catch (IllegalArgumentException e) {
+ /* ignore. */
+ } catch (IllegalAccessException e) {
+ /* ignore. */
+ }
+ }
+ return KeyStroke.getKeyStroke(keyToken.charAt(0), modifierMask);
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Sets the current locale.
+ *
+ * @param newLocale
+ * The new locale to use
+ */
+ public static void setLocale(Locale newLocale) {
+ setLocale(newLocale, true);
+ }
+
+ /**
+ * Sets the current locale.
+ *
+ * @param newLocale
+ * The new locale to use
+ * @param notify
+ * <code>true</code> to notify registered {@link I18nable}s
+ * after the language was changed
+ */
+ private static void setLocale(Locale newLocale, boolean notify) {
+ currentLocale = newLocale;
+ InputStream inputStream = null;
+ try {
+ currentLanguage = new Properties(defaultLanguage);
+ if (newLocale == Locale.ENGLISH) {
+ if (notify) {
+ notifyI18nables();
+ }
+ return;
+ }
+ inputStream = I18n.class.getResourceAsStream("jSite_" + newLocale.getLanguage() + ".properties");
+ if (inputStream != null) {
+ currentLanguage.load(inputStream);
+ if (notify) {
+ notifyI18nables();
+ }
+ }
+ } catch (MissingResourceException mre1) {
+ currentLocale = Locale.ENGLISH;
+ } catch (IOException ioe1) {
+ currentLocale = Locale.ENGLISH;
+ } finally {
+ Closer.close(inputStream);
+ }
+ }
+
+ /**
+ * Returns the current locale.
+ *
+ * @return The current locale
+ */
+ public static Locale getLocale() {
+ return currentLocale;
+ }
+
+ /**
+ * Finds all available locales.
+ *
+ * @return All available locales
+ */
+ public static List<Locale> findAvailableLanguages() {
+ List<Locale> availableLanguages = new ArrayList<Locale>();
+ availableLanguages.add(Locale.ENGLISH);
+ availableLanguages.add(Locale.GERMAN);
+ return availableLanguages;
+ }
+
+ /**
+ * Registers the given I18nable to be updated when the language is changed.
+ *
+ * @param i18nable
+ * The i18nable to register
+ */
+ public static void registerI18nable(I18nable i18nable) {
+ i18nables.add(i18nable);
+ }
+
+ /**
+ * Deregisters the given I18nable to be updated when the language is
+ * changed.
+ *
+ * @param i18nable
+ * The i18nable to register
+ */
+ public static void deregisterI18nable(I18nable i18nable) {
+ i18nables.remove(i18nable);
+ }
+
+ //
+ // PRIVATE METHODS
+ //
+
+ /**
+ * Notifies all registered {@link I18nable}s that the language was changed.
+ */
+ private static void notifyI18nables() {
+ for (I18nable i18nable: i18nables) {
+ i18nable.updateI18n();
+ }
+ }
+
+}
projects / jkeytool.git / commitdiff