Source code

001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.tools;
003
004import java.io.BufferedInputStream;
005import java.io.File;
006import java.io.IOException;
007import java.io.InputStream;
008import java.lang.annotation.Retention;
009import java.lang.annotation.RetentionPolicy;
010import java.net.URL;
011import java.nio.charset.StandardCharsets;
012import java.nio.file.InvalidPathException;
013import java.text.MessageFormat;
014import java.util.ArrayList;
015import java.util.Arrays;
016import java.util.Collection;
017import java.util.Comparator;
018import java.util.HashMap;
019import java.util.Locale;
020import java.util.Map;
021import java.util.zip.ZipEntry;
022import java.util.zip.ZipFile;
023
024/**
025 * Internationalisation support.
026 *
027 * @author Immanuel.Scholz
028 */
029public final class I18n {
030
031    /**
032     * This annotates strings which do not permit a clean i18n. This is mostly due to strings
033     * containing two nouns which can occur in singular or plural form.
034     * <br>
035     * No behaviour is associated with this annotation.
036     */
037    @Retention(RetentionPolicy.SOURCE)
038    public @interface QuirkyPluralString {
039    }
040
041    private I18n() {
042        // Hide default constructor for utils classes
043    }
044
045    /**
046     * Enumeration of possible plural modes. It allows us to identify and implement logical conditions of
047     * plural forms defined on <a href="https://help.launchpad.net/Translations/PluralForms">Launchpad</a>.
048     * See <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html">CLDR</a>
049     * for another complete list.
050     * @see #pluralEval
051     */
052    private enum PluralMode {
053        /** Plural = Not 1. This is the default for many languages, including English: 1 day, but 0 days or 2 days. */
054        MODE_NOTONE,
055        /** No plural. Mainly for Asian languages (Indonesian, Chinese, Japanese, ...) */
056        MODE_NONE,
057        /** Plural = Greater than 1. For some latin languages (French, Brazilian Portuguese) */
058        MODE_GREATERONE,
059        /* Special mode for
060         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#ar">Arabic</a>.*
061        MODE_AR,*/
062        /** Special mode for
063         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#cs">Czech</a>. */
064        MODE_CS,
065        /** Special mode for
066         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#pl">Polish</a>. */
067        MODE_PL,
068        /* Special mode for
069         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#ro">Romanian</a>.*
070        MODE_RO,*/
071        /** Special mode for
072         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#lt">Lithuanian</a>. */
073        MODE_LT,
074        /** Special mode for
075         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#ru">Russian</a>. */
076        MODE_RU,
077        /** Special mode for
078         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#sk">Slovak</a>. */
079        MODE_SK,
080        /* Special mode for
081         * <a href="http://www.unicode.org/cldr/charts/latest/supplemental/language_plural_rules.html#sl">Slovenian</a>.*
082        MODE_SL,*/
083    }
084
085    private static volatile PluralMode pluralMode = PluralMode.MODE_NOTONE; /* english default */
086    private static volatile String loadedCode = "en";
087
088    /** Map (english/locale) of singular strings **/
089    private static volatile Map<String, String> strings;
090    /** Map (english/locale) of plural strings **/
091    private static volatile Map<String, String[]> pstrings;
092    private static Locale originalLocale = Locale.getDefault();
093    private static Map<String, PluralMode> languages = new HashMap<>();
094    // NOTE: check also WikiLanguage handling in LanguageInfo.java when adding new languages
095    static {
096        //languages.put("ar", PluralMode.MODE_AR);
097        languages.put("ast", PluralMode.MODE_NOTONE);
098        languages.put("bg", PluralMode.MODE_NOTONE);
099        languages.put("be", PluralMode.MODE_RU);
100        languages.put("ca", PluralMode.MODE_NOTONE);
101        languages.put("ca@valencia", PluralMode.MODE_NOTONE);
102        languages.put("cs", PluralMode.MODE_CS);
103        languages.put("da", PluralMode.MODE_NOTONE);
104        languages.put("de", PluralMode.MODE_NOTONE);
105        languages.put("el", PluralMode.MODE_NOTONE);
106        languages.put("en_AU", PluralMode.MODE_NOTONE);
107        languages.put("en_GB", PluralMode.MODE_NOTONE);
108        languages.put("es", PluralMode.MODE_NOTONE);
109        languages.put("et", PluralMode.MODE_NOTONE);
110        //languages.put("eu", PluralMode.MODE_NOTONE);
111        languages.put("fi", PluralMode.MODE_NOTONE);
112        languages.put("fr", PluralMode.MODE_GREATERONE);
113        languages.put("gl", PluralMode.MODE_NOTONE);
114        //languages.put("he", PluralMode.MODE_NOTONE);
115        languages.put("hu", PluralMode.MODE_NOTONE);
116        languages.put("id", PluralMode.MODE_NONE);
117        //languages.put("is", PluralMode.MODE_NOTONE);
118        languages.put("it", PluralMode.MODE_NOTONE);
119        languages.put("ja", PluralMode.MODE_NONE);
120        languages.put("ko", PluralMode.MODE_NONE);
121        // fully supported only with Java 8 and later (needs CLDR)
122        languages.put("km", PluralMode.MODE_NONE);
123        languages.put("lt", PluralMode.MODE_LT);
124        languages.put("nb", PluralMode.MODE_NOTONE);
125        languages.put("nl", PluralMode.MODE_NOTONE);
126        languages.put("pl", PluralMode.MODE_PL);
127        languages.put("pt", PluralMode.MODE_NOTONE);
128        languages.put("pt_BR", PluralMode.MODE_GREATERONE);
129        //languages.put("ro", PluralMode.MODE_RO);
130        languages.put("ru", PluralMode.MODE_RU);
131        languages.put("sk", PluralMode.MODE_SK);
132        //languages.put("sl", PluralMode.MODE_SL);
133        languages.put("sv", PluralMode.MODE_NOTONE);
134        //languages.put("tr", PluralMode.MODE_NONE);
135        languages.put("uk", PluralMode.MODE_RU);
136        languages.put("vi", PluralMode.MODE_NONE);
137        languages.put("zh_CN", PluralMode.MODE_NONE);
138        languages.put("zh_TW", PluralMode.MODE_NONE);
139    }
140
141    private static String format(String text, Object... objects) {
142        try {
143            return MessageFormat.format(text, objects);
144        } catch (InvalidPathException e) {
145            System.err.println("!!! Unable to format '" + text + "': " + e.getMessage());
146            e.printStackTrace();
147            return null;
148        }
149    }
150
151    /**
152     * Translates some text for the current locale.
153     * These strings are collected by a script that runs on the source code files.
154     * After translation, the localizations are distributed with the main program.
155     * <br>
156     * For example, <code>tr("JOSM''s default value is ''{0}''.", val)</code>.
157     * <br>
158     * Use {@link #trn} for distinguishing singular from plural text, i.e.,
159     * do not use {@code tr(size == 1 ? "singular" : "plural")} nor
160     * {@code size == 1 ? tr("singular") : tr("plural")}
161     *
162     * @param text the text to translate.
163     * Must be a string literal. (No constants or local vars.)
164     * Can be broken over multiple lines.
165     * An apostrophe ' must be quoted by another apostrophe.
166     * @param objects the parameters for the string.
167     * Mark occurrences in {@code text} with <code>{0}</code>, <code>{1}</code>, ...
168     * @return the translated string.
169     * @see #trn
170     * @see #trc
171     * @see #trnc
172     */
173    public static String tr(String text, Object... objects) {
174        if (text == null) return null;
175        return format(gettext(text, null), objects);
176    }
177
178    /**
179     * Translates some text in a context for the current locale.
180     * There can be different translations for the same text within different contexts.
181     *
182     * @param context string that helps translators to find an appropriate
183     * translation for {@code text}.
184     * @param text the text to translate.
185     * @return the translated string.
186     * @see #tr
187     * @see #trn
188     * @see #trnc
189     */
190    public static String trc(String context, String text) {
191        if (context == null)
192            return tr(text);
193        if (text == null)
194            return null;
195        return format(gettext(text, context), (Object) null);
196    }
197
198    public static String trcLazy(String context, String text) {
199        if (context == null)
200            return tr(text);
201        if (text == null)
202            return null;
203        return format(gettextLazy(text, context), (Object) null);
204    }
205
206    /**
207     * Marks a string for translation (such that a script can harvest
208     * the translatable strings from the source files).
209     *
210     * For example, <code>
211     * String[] options = new String[] {marktr("up"), marktr("down")};
212     * lbl.setText(tr(options[0]));</code>
213     * @param text the string to be marked for translation.
214     * @return {@code text} unmodified.
215     */
216    public static String marktr(String text) {
217        return text;
218    }
219
220    public static String marktrc(String context, String text) {
221        return text;
222    }
223
224    /**
225     * Translates some text for the current locale and distinguishes between
226     * {@code singularText} and {@code pluralText} depending on {@code n}.
227     * <br>
228     * For instance, {@code trn("There was an error!", "There were errors!", i)} or
229     * <code>trn("Found {0} error in {1}!", "Found {0} errors in {1}!", i, Integer.toString(i), url)</code>.
230     *
231     * @param singularText the singular text to translate.
232     * Must be a string literal. (No constants or local vars.)
233     * Can be broken over multiple lines.
234     * An apostrophe ' must be quoted by another apostrophe.
235     * @param pluralText the plural text to translate.
236     * Must be a string literal. (No constants or local vars.)
237     * Can be broken over multiple lines.
238     * An apostrophe ' must be quoted by another apostrophe.
239     * @param n a number to determine whether {@code singularText} or {@code pluralText} is used.
240     * @param objects the parameters for the string.
241     * Mark occurrences in {@code singularText} and {@code pluralText} with <code>{0}</code>, <code>{1}</code>, ...
242     * @return the translated string.
243     * @see #tr
244     * @see #trc
245     * @see #trnc
246     */
247    public static String trn(String singularText, String pluralText, long n, Object... objects) {
248        return format(gettextn(singularText, pluralText, null, n), objects);
249    }
250
251    /**
252     * Translates some text in a context for the current locale and distinguishes between
253     * {@code singularText} and {@code pluralText} depending on {@code n}.
254     * There can be different translations for the same text within different contexts.
255     *
256     * @param context string that helps translators to find an appropriate
257     * translation for {@code text}.
258     * @param singularText the singular text to translate.
259     * Must be a string literal. (No constants or local vars.)
260     * Can be broken over multiple lines.
261     * An apostrophe ' must be quoted by another apostrophe.
262     * @param pluralText the plural text to translate.
263     * Must be a string literal. (No constants or local vars.)
264     * Can be broken over multiple lines.
265     * An apostrophe ' must be quoted by another apostrophe.
266     * @param n a number to determine whether {@code singularText} or {@code pluralText} is used.
267     * @param objects the parameters for the string.
268     * Mark occurrences in {@code singularText} and {@code pluralText} with <code>{0}</code>, <code>{1}</code>, ...
269     * @return the translated string.
270     * @see #tr
271     * @see #trc
272     * @see #trn
273     */
274    public static String trnc(String context, String singularText, String pluralText, long n, Object... objects) {
275        return format(gettextn(singularText, pluralText, context, n), objects);
276    }
277
278    private static String gettext(String text, String ctx, boolean lazy) {
279        int i;
280        if (ctx == null && text.startsWith("_:") && (i = text.indexOf('\n')) >= 0) {
281            ctx = text.substring(2, i-1);
282            text = text.substring(i+1);
283        }
284        if (strings != null) {
285            String trans = strings.get(ctx == null ? text : "_:"+ctx+'\n'+text);
286            if (trans != null)
287                return trans;
288        }
289        if (pstrings != null) {
290            i = pluralEval(1);
291            String[] trans = pstrings.get(ctx == null ? text : "_:"+ctx+'\n'+text);
292            if (trans != null && trans.length > i)
293                return trans[i];
294        }
295        return lazy ? gettext(text, null) : text;
296    }
297
298    private static String gettext(String text, String ctx) {
299        return gettext(text, ctx, false);
300    }
301
302    /* try without context, when context try fails */
303    private static String gettextLazy(String text, String ctx) {
304        return gettext(text, ctx, true);
305    }
306
307    private static String gettextn(String text, String plural, String ctx, long num) {
308        int i;
309        if (ctx == null && text.startsWith("_:") && (i = text.indexOf('\n')) >= 0) {
310            ctx = text.substring(2, i-1);
311            text = text.substring(i+1);
312        }
313        if (pstrings != null) {
314            i = pluralEval(num);
315            String[] trans = pstrings.get(ctx == null ? text : "_:"+ctx+'\n'+text);
316            if (trans != null && trans.length > i)
317                return trans[i];
318        }
319
320        return num == 1 ? text : plural;
321    }
322
323    public static String escape(String msg) {
324        if (msg == null) return null;
325        return msg.replace("\'", "\'\'").replace("{", "\'{\'").replace("}", "\'}\'");
326    }
327
328    private static URL getTranslationFile(String lang) {
329        return I18n.class.getResource("/data/"+lang.replace('@', '-')+".lang");
330    }
331
332    /**
333     * Get a list of all available JOSM Translations.
334     * @return an array of locale objects.
335     */
336    public static Locale[] getAvailableTranslations() {
337        Collection<Locale> v = new ArrayList<>(languages.size());
338        if (getTranslationFile("en") != null) {
339            for (String loc : languages.keySet()) {
340                if (getTranslationFile(loc) != null) {
341                    v.add(LanguageInfo.getLocale(loc));
342                }
343            }
344        }
345        v.add(Locale.ENGLISH);
346        Locale[] l = new Locale[v.size()];
347        l = v.toArray(l);
348        Arrays.sort(l, Comparator.comparing(Locale::toString));
349        return l;
350    }
351
352    /**
353     * Determines if a language exists for the given code.
354     * @param code The language code
355     * @return {@code true} if a language exists, {@code false} otherwise
356     */
357    public static boolean hasCode(String code) {
358        return languages.containsKey(code);
359    }
360
361    static String setupJavaLocaleProviders() {
362        // Look up SPI providers first (for JosmDecimalFormatSymbolsProvider).
363        // Enable CLDR locale provider on Java 8 to get additional languages, such as Khmer.
364        // https://docs.oracle.com/javase/8/docs/technotes/guides/intl/enhancements.8.html#cldr
365        // FIXME: This must be updated after we switch to Java 9.
366        // See https://docs.oracle.com/javase/9/docs/api/java/util/spi/LocaleServiceProvider.html
367        try {
368            try {
369                // First check we're able to open a stream to our own SPI file
370                // Java will fail on Windows if the jar file is in a folder with a space character!
371                I18n.class.getResourceAsStream("/META-INF/services/java.text.spi.DecimalFormatSymbolsProvider").close();
372                // Don't call Utils.updateSystemProperty to avoid spurious log at startup
373                return System.setProperty("java.locale.providers", "SPI,JRE,CLDR");
374            } catch (RuntimeException | IOException e) {
375                // Don't call Logging class, it may not be fully initialized yet
376                System.err.println("Unable to set SPI locale provider: " + e.getMessage());
377            }
378        } catch (SecurityException e) {
379            // Don't call Logging class, it may not be fully initialized yet
380            System.err.println("Unable to set locale providers: " + e.getMessage());
381        }
382        return System.setProperty("java.locale.providers", "JRE,CLDR");
383    }
384
385    /**
386     * I18n initialization.
387     */
388    public static void init() {
389        setupJavaLocaleProviders();
390
391        /* try initial language settings, may be changed later again */
392        if (!load(LanguageInfo.getJOSMLocaleCode())) {
393            Locale.setDefault(Locale.ENGLISH);
394        }
395    }
396
397    /**
398     * I18n initialization for plugins.
399     * @param source file path/name of the JAR or Zip file containing translation strings
400     * @since 4159
401     */
402    public static void addTexts(File source) {
403        if ("en".equals(loadedCode))
404            return;
405        final ZipEntry enfile = new ZipEntry("data/en.lang");
406        final ZipEntry langfile = new ZipEntry("data/"+loadedCode+".lang");
407        try (
408            ZipFile zipFile = new ZipFile(source, StandardCharsets.UTF_8);
409            InputStream orig = zipFile.getInputStream(enfile);
410            InputStream trans = zipFile.getInputStream(langfile)
411        ) {
412            if (orig != null && trans != null)
413                load(orig, trans, true);
414        } catch (IOException | InvalidPathException e) {
415            Logging.trace(e);
416        }
417    }
418
419    private static boolean load(String l) {
420        if ("en".equals(l) || "en_US".equals(l)) {
421            strings = null;
422            pstrings = null;
423            loadedCode = "en";
424            pluralMode = PluralMode.MODE_NOTONE;
425            return true;
426        }
427        URL en = getTranslationFile("en");
428        if (en == null)
429            return false;
430        URL tr = getTranslationFile(l);
431        if (tr == null || !languages.containsKey(l)) {
432            return false;
433        }
434        try (
435            InputStream enStream = Utils.openStream(en);
436            InputStream trStream = Utils.openStream(tr)
437        ) {
438            if (load(enStream, trStream, false)) {
439                pluralMode = languages.get(l);
440                loadedCode = l;
441                return true;
442            }
443        } catch (IOException e) {
444            // Ignore exception
445            Logging.trace(e);
446        }
447        return false;
448    }
449
450    private static boolean load(InputStream en, InputStream tr, boolean add) {
451        Map<String, String> s;
452        Map<String, String[]> p;
453        if (add) {
454            s = strings;
455            p = pstrings;
456        } else {
457            s = new HashMap<>();
458            p = new HashMap<>();
459        }
460        /* file format:
461           Files are always a group. English file and translated file must provide identical datasets.
462
463           for all single strings:
464           {
465             unsigned short (2 byte) stringlength
466               - length 0 indicates missing translation
467               - length 0xFFFE indicates translation equal to original, but otherwise is equal to length 0
468             string
469           }
470           unsigned short (2 byte) 0xFFFF (marks end of single strings)
471           for all multi strings:
472           {
473             unsigned char (1 byte) stringcount
474               - count 0 indicates missing translations
475               - count 0xFE indicates translations equal to original, but otherwise is equal to length 0
476             for stringcount
477               unsigned short (2 byte) stringlength
478               string
479           }
480         */
481        try {
482            InputStream ens = new BufferedInputStream(en);
483            InputStream trs = new BufferedInputStream(tr);
484            byte[] enlen = new byte[2];
485            byte[] trlen = new byte[2];
486            boolean multimode = false;
487            byte[] str = new byte[4096];
488            for (;;) {
489                if (multimode) {
490                    int ennum = ens.read();
491                    int trnum = trs.read();
492                    if (trnum == 0xFE) /* marks identical string, handle equally to non-translated */
493                        trnum = 0;
494                    if ((ennum == -1 && trnum != -1) || (ennum != -1 && trnum == -1)) /* files do not match */
495                        return false;
496                    if (ennum == -1) {
497                        break;
498                    }
499                    String[] enstrings = new String[ennum];
500                    for (int i = 0; i < ennum; ++i) {
501                        int val = ens.read(enlen);
502                        if (val != 2) /* file corrupt */
503                            return false;
504                        val = (enlen[0] < 0 ? 256+enlen[0] : enlen[0])*256+(enlen[1] < 0 ? 256+enlen[1] : enlen[1]);
505                        if (val > str.length) {
506                            str = new byte[val];
507                        }
508                        int rval = ens.read(str, 0, val);
509                        if (rval != val) /* file corrupt */
510                            return false;
511                        enstrings[i] = new String(str, 0, val, StandardCharsets.UTF_8);
512                    }
513                    String[] trstrings = new String[trnum];
514                    for (int i = 0; i < trnum; ++i) {
515                        int val = trs.read(trlen);
516                        if (val != 2) /* file corrupt */
517                            return false;
518                        val = (trlen[0] < 0 ? 256+trlen[0] : trlen[0])*256+(trlen[1] < 0 ? 256+trlen[1] : trlen[1]);
519                        if (val > str.length) {
520                            str = new byte[val];
521                        }
522                        int rval = trs.read(str, 0, val);
523                        if (rval != val) /* file corrupt */
524                            return false;
525                        trstrings[i] = new String(str, 0, val, StandardCharsets.UTF_8);
526                    }
527                    if (trnum > 0 && !p.containsKey(enstrings[0])) {
528                        p.put(enstrings[0], trstrings);
529                    }
530                } else {
531                    int enval = ens.read(enlen);
532                    int trval = trs.read(trlen);
533                    if (enval != trval) /* files do not match */
534                        return false;
535                    if (enval == -1) {
536                        break;
537                    }
538                    if (enval != 2) /* files corrupt */
539                        return false;
540                    enval = (enlen[0] < 0 ? 256+enlen[0] : enlen[0])*256+(enlen[1] < 0 ? 256+enlen[1] : enlen[1]);
541                    trval = (trlen[0] < 0 ? 256+trlen[0] : trlen[0])*256+(trlen[1] < 0 ? 256+trlen[1] : trlen[1]);
542                    if (trval == 0xFFFE) /* marks identical string, handle equally to non-translated */
543                        trval = 0;
544                    if (enval == 0xFFFF) {
545                        multimode = true;
546                        if (trval != 0xFFFF) /* files do not match */
547                            return false;
548                    } else {
549                        if (enval > str.length) {
550                            str = new byte[enval];
551                        }
552                        if (trval > str.length) {
553                            str = new byte[trval];
554                        }
555                        int val = ens.read(str, 0, enval);
556                        if (val != enval) /* file corrupt */
557                            return false;
558                        String enstr = new String(str, 0, enval, StandardCharsets.UTF_8);
559                        if (trval != 0) {
560                            val = trs.read(str, 0, trval);
561                            if (val != trval) /* file corrupt */
562                                return false;
563                            String trstr = new String(str, 0, trval, StandardCharsets.UTF_8);
564                            if (!s.containsKey(enstr))
565                                s.put(enstr, trstr);
566                        }
567                    }
568                }
569            }
570        } catch (IOException e) {
571            Logging.trace(e);
572            return false;
573        }
574        if (!s.isEmpty()) {
575            strings = s;
576            pstrings = p;
577            return true;
578        }
579        return false;
580    }
581
582    /**
583     * Sets the default locale (see {@link Locale#setDefault(Locale)} to the local
584     * given by <code>localName</code>.
585     *
586     * Ignored if localeName is null. If the locale with name <code>localName</code>
587     * isn't found the default local is set to <code>en</code> (english).
588     *
589     * @param localeName the locale name. Ignored if null.
590     */
591    public static void set(String localeName) {
592        if (localeName != null) {
593            Locale l = LanguageInfo.getLocale(localeName);
594            if (load(LanguageInfo.getJOSMLocaleCode(l))) {
595                Locale.setDefault(l);
596            } else {
597                if (!"en".equals(l.getLanguage())) {
598                    Logging.info(tr("Unable to find translation for the locale {0}. Reverting to {1}.",
599                            LanguageInfo.getDisplayName(l), LanguageInfo.getDisplayName(Locale.getDefault())));
600                } else {
601                    strings = null;
602                    pstrings = null;
603                }
604            }
605        }
606    }
607
608    private static int pluralEval(long n) {
609        switch(pluralMode) {
610        case MODE_NOTONE: /* bg, da, de, el, en, en_GB, es, et, eu, fi, gl, is, it, iw_IL, nb, nl, sv */
611            return (n != 1) ? 1 : 0;
612        case MODE_NONE: /* id, vi, ja, km, tr, zh_CN, zh_TW */
613            return 0;
614        case MODE_GREATERONE: /* fr, pt_BR */
615            return (n > 1) ? 1 : 0;
616        case MODE_CS:
617            return (n == 1) ? 0 : (((n >= 2) && (n <= 4)) ? 1 : 2);
618        //case MODE_AR:
619        //    return ((n == 0) ? 0 : ((n == 1) ? 1 : ((n == 2) ? 2 : ((((n % 100) >= 3)
620        //            && ((n % 100) <= 10)) ? 3 : ((((n % 100) >= 11) && ((n % 100) <= 99)) ? 4 : 5)))));
621        case MODE_PL:
622            return (n == 1) ? 0 : (((((n % 10) >= 2) && ((n % 10) <= 4))
623                    && (((n % 100) < 10) || ((n % 100) >= 20))) ? 1 : 2);
624        //case MODE_RO:
625        //    return ((n == 1) ? 0 : ((((n % 100) > 19) || (((n % 100) == 0) && (n != 0))) ? 2 : 1));
626        case MODE_LT:
627            return ((n % 10) == 1) && ((n % 100) != 11) ? 0 : (((n % 10) >= 2)
628                    && (((n % 100) < 10) || ((n % 100) >= 20)) ? 1 : 2);
629        case MODE_RU:
630            return (((n % 10) == 1) && ((n % 100) != 11)) ? 0 : (((((n % 10) >= 2)
631                    && ((n % 10) <= 4)) && (((n % 100) < 10) || ((n % 100) >= 20))) ? 1 : 2);
632        case MODE_SK:
633            return (n == 1) ? 1 : (((n >= 2) && (n <= 4)) ? 2 : 0);
634        //case MODE_SL:
635        //    return (((n % 100) == 1) ? 1 : (((n % 100) == 2) ? 2 : ((((n % 100) == 3)
636        //            || ((n % 100) == 4)) ? 3 : 0)));
637        }
638        return 0;
639    }
640
641    /**
642     * Returns the map of singular translations.
643     * @return the map of singular translations.
644     * @since 13761
645     */
646    public static Map<String, String> getSingularTranslations() {
647        return new HashMap<>(strings);
648    }
649
650    /**
651     * Returns the map of plural translations.
652     * @return the map of plural translations.
653     * @since 13761
654     */
655    public static Map<String, String[]> getPluralTranslations() {
656        return new HashMap<>(pstrings);
657    }
658
659    /**
660     * Returns the original default locale found when the JVM started.
661     * Used to guess real language/country of current user disregarding language chosen in JOSM preferences.
662     * @return the original default locale found when the JVM started
663     * @since 14013
664     */
665    public static Locale getOriginalLocale() {
666        return originalLocale;
667    }
668}