| 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.tools;
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| 3 |
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| 4 | import java.util.ArrayList;
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| 5 | import java.util.List;
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| 6 | import java.util.Locale;
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| 7 |
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| 8 | /**
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| 9 | * This is a utility class that provides information about locales and allows to convert locale codes.
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| 10 | */
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| 11 | public final class LanguageInfo {
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| 12 |
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| 13 | private LanguageInfo() {
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| 14 | // Hide default constructor for utils classes
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| 15 | }
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| 16 |
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| 17 | /**
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| 18 | * Type of the locale to use
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| 19 | * @since 5915
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| 20 | */
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| 21 | public enum LocaleType {
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| 22 | /** The current default language */
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| 23 | DEFAULT,
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| 24 | /** The current default language, but not english */
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| 25 | DEFAULTNOTENGLISH,
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| 26 | /** The base language (i.e. pt for pt_BR) */
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| 27 | BASELANGUAGE,
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| 28 | /** The standard english texts */
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| 29 | ENGLISH,
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| 30 | /** The locale prefix on the OSM wiki */
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| 31 | OSM_WIKI,
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| 32 | }
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| 33 |
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| 34 | /**
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| 35 | * Replies the wiki language prefix for the given locale. The wiki language
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| 36 | * prefix has the form 'Xy:' where 'Xy' is a ISO 639 language code in title
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| 37 | * case (or Xy_AB: for sub languages).
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| 38 | *
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| 39 | * @param type the type
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| 40 | * @return the wiki language prefix or {@code null} for {@link LocaleType#BASELANGUAGE}, when
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| 41 | * base language is identical to default or english
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| 42 | * @since 5915
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| 43 | */
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| 44 | public static String getWikiLanguagePrefix(LocaleType type) {
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| 45 | return getWikiLanguagePrefix(Locale.getDefault(), type);
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| 46 | }
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| 47 |
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| 48 | static String getWikiLanguagePrefix(Locale locale, LocaleType type) {
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| 49 | if (type == LocaleType.ENGLISH) {
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| 50 | return "";
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| 51 | } else if (type == LocaleType.OSM_WIKI && Locale.ENGLISH.getLanguage().equals(locale.getLanguage())) {
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| 52 | return "";
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| 53 | } else if (type == LocaleType.OSM_WIKI && Locale.SIMPLIFIED_CHINESE.equals(locale)) {
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| 54 | return "Zh-hans:";
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| 55 | } else if (type == LocaleType.OSM_WIKI && Locale.TRADITIONAL_CHINESE.equals(locale)) {
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| 56 | return "Zh-hant:";
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| 57 | }
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| 58 |
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| 59 | String code = getJOSMLocaleCode(locale);
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| 60 |
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| 61 | if (type == LocaleType.OSM_WIKI) {
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| 62 | if (code.matches("[^_@]+[_@][^_]+")) {
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| 63 | code = code.substring(0, 2);
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| 64 | if ("en".equals(code)) {
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| 65 | return "";
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| 66 | }
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| 67 | }
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| 68 | switch (code) {
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| 69 | case "nb": /* OSM-Wiki has "no", but no "nb" */
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| 70 | return "No:";
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| 71 | case "sr@latin": /* OSM-Wiki has "Sr-latn" and not Sr-latin */
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| 72 | return "Sr-latn:";
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| 73 | case "de":
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| 74 | case "es":
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| 75 | case "fr":
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| 76 | case "it":
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| 77 | case "nl":
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| 78 | case "ru":
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| 79 | case "ja":
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| 80 | return code.toUpperCase(Locale.ENGLISH) + ":";
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| 81 | default:
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| 82 | return code.substring(0, 1).toUpperCase(Locale.ENGLISH) + code.substring(1) + ":";
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| 83 | }
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| 84 | }
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| 85 |
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| 86 | if (type == LocaleType.BASELANGUAGE) {
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| 87 | if (code.matches("[^_]+_[^_]+")) {
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| 88 | code = code.substring(0, 2);
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| 89 | if ("en".equals(code))
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| 90 | return null;
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| 91 | } else {
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| 92 | return null;
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| 93 | }
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| 94 | } else if (type == LocaleType.DEFAULTNOTENGLISH && "en".equals(code)) {
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| 95 | return null;
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| 96 | } else if (code.matches(".+@.+")) {
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| 97 | return code.substring(0, 1).toUpperCase(Locale.ENGLISH)
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| 98 | + code.charAt(1)
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| 99 | + '-'
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| 100 | + code.substring(3, 4).toUpperCase(Locale.ENGLISH)
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| 101 | + code.substring(4)
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| 102 | + ':';
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| 103 | }
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| 104 | return code.substring(0, 1).toUpperCase(Locale.ENGLISH) + code.substring(1) + ':';
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| 105 | }
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| 106 |
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| 107 | /**
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| 108 | * Replies the wiki language prefix for the current locale.
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| 109 | *
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| 110 | * @return the wiki language prefix
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| 111 | * @see Locale#getDefault()
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| 112 | * @see #getWikiLanguagePrefix(LocaleType)
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| 113 | */
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| 114 | public static String getWikiLanguagePrefix() {
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| 115 | return getWikiLanguagePrefix(LocaleType.DEFAULT);
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| 116 | }
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| 117 |
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| 118 | /**
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| 119 | * Replies the JOSM locale code for the default locale.
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| 120 | *
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| 121 | * @return the JOSM locale code for the default locale
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| 122 | * @see #getJOSMLocaleCode(Locale)
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| 123 | */
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| 124 | public static String getJOSMLocaleCode() {
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| 125 | return getJOSMLocaleCode(Locale.getDefault());
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| 126 | }
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| 127 |
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| 128 | /**
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| 129 | * Replies the locale code used by JOSM for a given locale.
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| 130 | * <p>
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| 131 | * In most cases JOSM uses the 2-character ISO 639 language code ({@link Locale#getLanguage()}
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| 132 | * to identify the locale of a localized resource, but in some cases it may use the
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| 133 | * programmatic name for locales, as replied by {@link Locale#toString()}.
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| 134 | * <p>
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| 135 | * For unknown country codes and variants this function already does fallback to
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| 136 | * internally known translations.
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| 137 | *
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| 138 | * @param locale the locale. Replies "en" if null.
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| 139 | * @return the JOSM code for the given locale
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| 140 | */
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| 141 | public static String getJOSMLocaleCode(Locale locale) {
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| 142 | if (locale == null) return "en";
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| 143 | for (String full : getLanguageCodes(locale)) {
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| 144 | if ("iw_IL".equals(full))
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| 145 | return "he";
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| 146 | else if ("in".equals(full))
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| 147 | return "id";
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| 148 | else if (I18n.hasCode(full)) // catch all non-single codes
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| 149 | return full;
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| 150 | }
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| 151 |
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| 152 | // return single code as fallback
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| 153 | return locale.getLanguage();
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| 154 | }
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| 155 |
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| 156 | /**
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| 157 | * Replies the OSM locale codes for the default locale.
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| 158 | *
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| 159 | * @param prefix a prefix like {@code name:}.
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| 160 | * @return the OSM locale codes for the default locale
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| 161 | * @see #getOSMLocaleCodes(String, Locale)
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| 162 | * @since 19045
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| 163 | */
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| 164 | public static String[] getOSMLocaleCodes(String prefix) {
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| 165 | return getOSMLocaleCodes(prefix, Locale.getDefault());
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| 166 | }
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| 167 |
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| 168 | /**
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| 169 | * Replies the locale codes used by OSM for a given locale.
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| 170 | * <p>
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| 171 | * In most cases OSM uses the 2-character ISO 639 language code ({@link Locale#getLanguage()}
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| 172 | * to identify the locale of a localized resource, but in some cases it may use the
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| 173 | * programmatic name for locales, as replied by {@link Locale#toString()}.
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| 174 | * <p>
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| 175 | * For unknown country codes and variants this function already does fallback to
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| 176 | * internally known translations.
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| 177 | *
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| 178 | * @param prefix a prefix like {@code name:}.
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| 179 | * @param locale the locale. Replies "en" if null.
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| 180 | * @return the OSM codes for the given locale
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| 181 | * @since 19045
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| 182 | */
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| 183 | public static String[] getOSMLocaleCodes(String prefix, Locale locale) {
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| 184 | if (prefix == null) {
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| 185 | prefix = "";
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| 186 | }
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| 187 | String main = getJOSMLocaleCode(locale);
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| 188 | switch (main) {
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| 189 | case "zh_CN":
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| 190 | return new String[]{prefix+"zh-Hans-CN", prefix+"zh-Hans", prefix+"zh"};
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| 191 | case "zh_TW":
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| 192 | return new String[]{prefix+"zh-Hant-TW", prefix+"zh-Hant", prefix+"zh"};
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| 193 | default:
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| 194 | ArrayList<String> r = new ArrayList<>();
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| 195 | for (String s : LanguageInfo.getLanguageCodes(null)) {
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| 196 | r.add(prefix + s);
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| 197 | }
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| 198 | return r.toArray(String[]::new);
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| 199 | }
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| 200 | }
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| 201 |
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| 202 | /**
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| 203 | * Replies the locale code used by Java for a given locale.
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| 204 | * <p>
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| 205 | * In most cases JOSM and Java uses the same codes, but for some exceptions this is needed.
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| 206 | *
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| 207 | * @param localeName the locale. Replies "en" if null.
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| 208 | * @return the Java code for the given locale
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| 209 | * @since 8232
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| 210 | */
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| 211 | public static String getJavaLocaleCode(String localeName) {
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| 212 | if (localeName == null) return "en";
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| 213 | switch (localeName) {
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| 214 | case "ca@valencia":
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| 215 | return "ca__valencia";
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| 216 | case "sr@latin":
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| 217 | return "sr__latin";
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| 218 | case "he":
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| 219 | return "iw_IL";
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| 220 | case "id":
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| 221 | return "in";
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| 222 | default:
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| 223 | return localeName;
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| 224 | }
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| 225 | }
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| 226 |
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| 227 | /**
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| 228 | * Replies the display string used by JOSM for a given locale.
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| 229 | * <p>
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| 230 | * In most cases returns text replied by {@link Locale#getDisplayName()}, for some
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| 231 | * locales an override is used (i.e. when unsupported by Java).
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| 232 | *
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| 233 | * @param locale the locale. Replies "en" if null.
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| 234 | * @return the display string for the given locale
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| 235 | * @since 8232
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| 236 | */
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| 237 | public static String getDisplayName(Locale locale) {
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| 238 | String currentCountry = Locale.getDefault().getCountry();
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| 239 | String localeCountry = locale.getCountry();
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| 240 | // Don't display locale country if country has been forced to current country at JOSM startup
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| 241 | if (currentCountry.equals(localeCountry) && !I18n.hasCode(getLanguageCodes(locale).get(0))) {
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| 242 | return new Locale(locale.getLanguage(), "", locale.getVariant()).getDisplayName();
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| 243 | }
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| 244 | return locale.getDisplayName();
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| 245 | }
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| 246 |
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| 247 | /**
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| 248 | * Replies the locale used by Java for a given language code.
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| 249 | * <p>
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| 250 | * Accepts JOSM and Java codes as input.
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| 251 | *
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| 252 | * @param localeName the locale code.
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| 253 | * @return the resulting locale
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| 254 | */
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| 255 | public static Locale getLocale(String localeName) {
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| 256 | return getLocale(localeName, false);
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| 257 | }
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| 258 |
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| 259 | /**
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| 260 | * Replies the locale used by Java for a given language code.
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| 261 | * <p>
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| 262 | * Accepts JOSM, Java and POSIX codes as input.
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| 263 | *
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| 264 | * @param localeName the locale code.
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| 265 | * @param useDefaultCountry if {@code true}, the current locale country will be used if no country is specified
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| 266 | * @return the resulting locale
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| 267 | * @since 15547
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| 268 | */
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| 269 | public static Locale getLocale(String localeName, boolean useDefaultCountry) {
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| 270 | final int encoding = localeName.indexOf('.');
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| 271 | if (encoding > 0) {
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| 272 | localeName = localeName.substring(0, encoding);
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| 273 | }
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| 274 | int country = localeName.indexOf('_');
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| 275 | int variant = localeName.indexOf('@');
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| 276 | if (variant < 0 && country >= 0)
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| 277 | variant = localeName.indexOf('_', country+1);
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| 278 | Locale l;
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| 279 | if (variant > 0 && country > 0) {
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| 280 | l = new Locale(localeName.substring(0, country), localeName.substring(country+1, variant), localeName.substring(variant + 1));
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| 281 | } else if (variant > 0) {
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| 282 | l = new Locale(localeName.substring(0, variant), "", localeName.substring(variant + 1));
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| 283 | } else if (country > 0) {
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| 284 | l = new Locale(localeName.substring(0, country), localeName.substring(country + 1));
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| 285 | } else {
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| 286 | l = new Locale(localeName, useDefaultCountry ? Locale.getDefault().getCountry() : "");
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| 287 | }
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| 288 | return l;
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| 289 | }
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| 290 |
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| 291 | /**
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| 292 | * Check if a new language is better than a previous existing. Can be used in classes where
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| 293 | * multiple user supplied language marked strings appear and the best one is searched. Following
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| 294 | * priorities: current language, english, any other
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| 295 | *
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| 296 | * @param oldLanguage the language code of the existing string
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| 297 | * @param newLanguage the language code of the new string
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| 298 | * @return true if new one is better
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| 299 | * @since 8091
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| 300 | */
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| 301 | public static boolean isBetterLanguage(String oldLanguage, String newLanguage) {
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| 302 | if (oldLanguage == null)
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| 303 | return true;
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| 304 | String want = getJOSMLocaleCode();
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| 305 | return want.equals(newLanguage) || (!want.equals(oldLanguage) && newLanguage.startsWith("en"));
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| 306 | }
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| 307 |
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| 308 | /**
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| 309 | * Replies the language prefix for use in XML elements (with a dot appended).
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| 310 | *
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| 311 | * @return the XML language prefix
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| 312 | * @see #getJOSMLocaleCode()
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| 313 | */
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| 314 | public static String getLanguageCodeXML() {
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| 315 | String code = getJOSMLocaleCode();
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| 316 | code = code.replace('@', '-');
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| 317 | return code+'.';
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| 318 | }
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| 319 |
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| 320 | /**
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| 321 | * Replies the language prefix for use in manifests (with an underscore appended).
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| 322 | *
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| 323 | * @return the manifest language prefix
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| 324 | * @see #getJOSMLocaleCode()
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| 325 | */
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| 326 | public static String getLanguageCodeManifest() {
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| 327 | String code = getJOSMLocaleCode();
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| 328 | code = code.replace('@', '-');
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| 329 | return code+'_';
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| 330 | }
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| 331 |
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| 332 | /**
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| 333 | * Replies a list of language codes for local names. Prefixes range from very specific
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| 334 | * to more generic.
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| 335 | * <ul>
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| 336 | * <li>lang_COUNTRY@variant of the current locale</li>
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| 337 | * <li>lang@variant of the current locale</li>
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| 338 | * <li>lang_COUNTRY of the current locale</li>
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| 339 | * <li>lang of the current locale</li>
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| 340 | * </ul>
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| 341 | *
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| 342 | * @param l the locale to use, <code>null</code> for default locale
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| 343 | * @return list of codes
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| 344 | * @since 8283
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| 345 | */
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| 346 | public static List<String> getLanguageCodes(Locale l) {
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| 347 | List<String> list = new ArrayList<>(4);
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| 348 | if (l == null)
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| 349 | l = Locale.getDefault();
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| 350 | String lang = l.getLanguage();
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| 351 | String c = l.getCountry();
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| 352 | String v = l.getVariant();
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| 353 | if (c.isEmpty())
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| 354 | c = null;
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| 355 | if (!Utils.isEmpty(v)) {
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| 356 | if (c != null)
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| 357 | list.add(lang+'_'+c+'@'+v);
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| 358 | list.add(lang+'@'+v);
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| 359 | }
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| 360 | if (c != null)
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| 361 | list.add(lang+'_'+c);
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| 362 | list.add(lang);
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| 363 | return list;
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| 364 | }
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| 365 | }
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