| 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.Collection;
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| 5 | import java.util.LinkedList;
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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 | }
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| 31 |
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| 32 | /**
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| 33 | * Replies the wiki language prefix for the given locale. The wiki language
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| 34 | * prefix has the form 'Xy:' where 'Xy' is a ISO 639 language code in title
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| 35 | * case (or Xy_AB: for sub languages).
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| 36 | *
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| 37 | * @param type the type
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| 38 | * @return the wiki language prefix or {@code null} for {@link LocaleType#BASELANGUAGE}, when
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| 39 | * base language is identical to default or english
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| 40 | * @since 5915
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| 41 | */
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| 42 | public static String getWikiLanguagePrefix(LocaleType type) {
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| 43 | if (type == LocaleType.ENGLISH)
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| 44 | return "";
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| 45 |
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| 46 | String code = getJOSMLocaleCode();
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| 47 | if (type == LocaleType.BASELANGUAGE) {
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| 48 | if (code.matches("[^_]+_[^_]+")) {
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| 49 | code = code.substring(0, 2);
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| 50 | if ("en".equals(code))
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| 51 | return null;
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| 52 | } else {
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| 53 | return null;
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| 54 | }
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| 55 | } else if (type == LocaleType.DEFAULTNOTENGLISH && "en".equals(code)) {
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| 56 | return null;
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| 57 | } else if (code.matches(".+@.+")) {
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| 58 | return code.substring(0, 1).toUpperCase(Locale.ENGLISH) + code.substring(1, 2)
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| 59 | + '-' + code.substring(3, 4).toUpperCase(Locale.ENGLISH) + code.substring(4) + ':';
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| 60 | }
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| 61 | return code.substring(0, 1).toUpperCase(Locale.ENGLISH) + code.substring(1) + ':';
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| 62 | }
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| 63 |
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| 64 | /**
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| 65 | * Replies the wiki language prefix for the current locale.
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| 66 | *
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| 67 | * @return the wiki language prefix
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| 68 | * @see Locale#getDefault()
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| 69 | * @see #getWikiLanguagePrefix(LocaleType)
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| 70 | */
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| 71 | public static String getWikiLanguagePrefix() {
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| 72 | return getWikiLanguagePrefix(LocaleType.DEFAULT);
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| 73 | }
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| 74 |
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| 75 | /**
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| 76 | * Replies the JOSM locale code for the default locale.
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| 77 | *
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| 78 | * @return the JOSM locale code for the default locale
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| 79 | * @see #getJOSMLocaleCode(Locale)
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| 80 | */
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| 81 | public static String getJOSMLocaleCode() {
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| 82 | return getJOSMLocaleCode(Locale.getDefault());
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| 83 | }
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| 84 |
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| 85 | /**
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| 86 | * Replies the locale code used by JOSM for a given locale.
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| 87 | *
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| 88 | * In most cases JOSM uses the 2-character ISO 639 language code ({@link Locale#getLanguage()}
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| 89 | * to identify the locale of a localized resource, but in some cases it may use the
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| 90 | * programmatic name for locales, as replied by {@link Locale#toString()}.
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| 91 | *
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| 92 | * For unknown country codes and variants this function already does fallback to
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| 93 | * internally known translations.
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| 94 | *
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| 95 | * @param locale the locale. Replies "en" if null.
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| 96 | * @return the JOSM code for the given locale
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| 97 | */
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| 98 | public static String getJOSMLocaleCode(Locale locale) {
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| 99 | if (locale == null) return "en";
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| 100 | for (String full : getLanguageCodes(locale)) {
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| 101 | if ("iw_IL".equals(full))
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| 102 | return "he";
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| 103 | else if ("in".equals(full))
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| 104 | return "id";
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| 105 | else if (I18n.hasCode(full)) // catch all non-single codes
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| 106 | return full;
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| 107 | }
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| 108 |
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| 109 | // return single code as fallback
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| 110 | return locale.getLanguage();
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| 111 | }
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| 112 |
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| 113 | /**
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| 114 | * Replies the locale code used by Java for a given locale.
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| 115 | *
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| 116 | * In most cases JOSM and Java uses the same codes, but for some exceptions this is needed.
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| 117 | *
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| 118 | * @param localeName the locale. Replies "en" if null.
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| 119 | * @return the Java code for the given locale
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| 120 | * @since 8232
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| 121 | */
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| 122 | public static String getJavaLocaleCode(String localeName) {
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| 123 | if (localeName == null) return "en";
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| 124 | if ("ca@valencia".equals(localeName)) {
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| 125 | localeName = "ca__valencia";
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| 126 | } else if ("he".equals(localeName)) {
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| 127 | localeName = "iw_IL";
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| 128 | } else if ("id".equals(localeName)) {
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| 129 | localeName = "in";
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| 130 | }
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| 131 | return localeName;
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| 132 | }
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| 133 |
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| 134 | /**
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| 135 | * Replies the display string used by JOSM for a given locale.
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| 136 | *
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| 137 | * In most cases returns text replied by {@link Locale#getDisplayName()}, for some
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| 138 | * locales an override is used (i.e. when unsupported by Java).
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| 139 | *
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| 140 | * @param locale the locale. Replies "en" if null.
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| 141 | * @return the display string for the given locale
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| 142 | * @since 8232
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| 143 | */
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| 144 | public static String getDisplayName(Locale locale) {
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| 145 | return locale.getDisplayName();
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| 146 | }
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| 147 |
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| 148 | /**
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| 149 | * Replies the locale used by Java for a given language code.
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| 150 | *
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| 151 | * Accepts JOSM and Java codes as input.
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| 152 | *
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| 153 | * @param localeName the locale code.
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| 154 | * @return the resulting locale
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| 155 | */
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| 156 | public static Locale getLocale(String localeName) {
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| 157 | int country = localeName.indexOf('_');
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| 158 | int variant = localeName.indexOf('@');
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| 159 | if (variant < 0 && country >= 0)
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| 160 | variant = localeName.indexOf('_', country+1);
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| 161 | Locale l;
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| 162 | if (variant > 0 && country > 0) {
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| 163 | l = new Locale(localeName.substring(0, country), localeName.substring(country+1, variant), localeName.substring(variant + 1));
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| 164 | } else if (variant > 0) {
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| 165 | l = new Locale(localeName.substring(0, variant), "", localeName.substring(variant + 1));
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| 166 | } else if (country > 0) {
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| 167 | l = new Locale(localeName.substring(0, country), localeName.substring(country + 1));
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| 168 | } else {
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| 169 | l = new Locale(localeName);
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| 170 | }
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| 171 | return l;
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| 172 | }
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| 173 |
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| 174 | /**
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| 175 | * Check if a new language is better than a previous existing. Can be used in classes where
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| 176 | * multiple user supplied language marked strings appear and the best one is searched. Following
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| 177 | * priorities: current language, english, any other
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| 178 | *
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| 179 | * @param oldLanguage the language code of the existing string
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| 180 | * @param newLanguage the language code of the new string
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| 181 | * @return true if new one is better
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| 182 | * @since 8091
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| 183 | */
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| 184 | public static boolean isBetterLanguage(String oldLanguage, String newLanguage) {
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| 185 | if (oldLanguage == null)
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| 186 | return true;
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| 187 | String want = getJOSMLocaleCode();
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| 188 | return want.equals(newLanguage) || (!want.equals(oldLanguage) && newLanguage.startsWith("en"));
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| 189 | }
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| 190 |
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| 191 | /**
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| 192 | * Replies the language prefix for use in XML elements (with a dot appended).
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| 193 | *
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| 194 | * @return the XML language prefix
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| 195 | * @see #getJOSMLocaleCode()
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| 196 | */
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| 197 | public static String getLanguageCodeXML() {
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| 198 | String code = getJOSMLocaleCode();
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| 199 | code = code.replace('@', '-');
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| 200 | return code+'.';
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| 201 | }
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| 202 |
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| 203 | /**
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| 204 | * Replies the language prefix for use in manifests (with an underscore appended).
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| 205 | *
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| 206 | * @return the manifest language prefix
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| 207 | * @see #getJOSMLocaleCode()
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| 208 | */
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| 209 | public static String getLanguageCodeManifest() {
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| 210 | String code = getJOSMLocaleCode();
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| 211 | code = code.replace('@', '-');
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| 212 | return code+'_';
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| 213 | }
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| 214 |
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| 215 | /**
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| 216 | * Replies a list of language codes for local names. Prefixes range from very specific
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| 217 | * to more generic.
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| 218 | * <ul>
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| 219 | * <li>lang_COUNTRY@variant of the current locale</li>
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| 220 | * <li>lang@variant of the current locale</li>
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| 221 | * <li>lang_COUNTRY of the current locale</li>
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| 222 | * <li>lang of the current locale</li>
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| 223 | * </ul>
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| 224 | *
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| 225 | * @param l the locale to use, <code>null</code> for default locale
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| 226 | * @return list of codes
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| 227 | * @since 8283
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| 228 | */
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| 229 | public static Collection<String> getLanguageCodes(Locale l) {
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| 230 | Collection<String> list = new LinkedList<>();
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| 231 | if (l == null)
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| 232 | l = Locale.getDefault();
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| 233 | String lang = l.getLanguage();
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| 234 | String c = l.getCountry();
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| 235 | String v = l.getVariant();
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| 236 | if (c.isEmpty())
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| 237 | c = null;
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| 238 | if (v != null && !v.isEmpty()) {
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| 239 | if (c != null)
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| 240 | list.add(lang+'_'+c+'@'+v);
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| 241 | list.add(lang+'@'+v);
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| 242 | }
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| 243 | if (c != null)
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| 244 | list.add(lang+'_'+c);
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| 245 | list.add(lang);
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| 246 | return list;
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| 247 | }
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| 248 | }
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