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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.util;
import android.text.TextUtils;
import java.util.Locale;
public class LocaleUtils {
/**
* Function normalizes BCP-47 language tags to use non-legacy language codes and only return
* 'language-region' style codes for use with Accept-Language and Requested Locales.
*
* <p>Locale.getLanguage() may return legacy language code until Java 17
*
* @param locale The BCP-47 locale to normalize. e.g., iw-IL, zn-Hans-CN, en-US-u-mu-celsius,
* @return A normalized BCP-47 language code with only language-region, e.g., he-IL, zn-CN, en-US.
*/
public static String getLanguageRegionLocale(final Locale locale) {
String language = locale.getLanguage();
if (language.equals("in")) {
language = "id";
} else if (language.equals("iw")) {
language = "he";
} else if (language.equals("ji")) {
language = "yi";
}
final StringBuilder out = new StringBuilder(language);
final String country = locale.getCountry();
if (!TextUtils.isEmpty(country)) {
out.append('-').append(country);
}
// e.g. "en", "en-US"
return out.toString();
}
}