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LibUnicode: Add a method to combine locale subtags into a display string

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This is just a convenience wrapper around the underlying generated APIs.
This commit is contained in:
Timothy Flynn 2022-01-13 13:12:03 -05:00 • committed by Linus Groh
parent 91acc2e9c5
commit b0671ceb74
2 changed files with 35 additions and 0 deletions
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34
Userland/Libraries/LibUnicode/Locale.cpp
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@ -765,6 +765,40 @@ Optional<StringView> __attribute__((weak)) get_locale_short_date_field_mapping(S
Optional<StringView> __attribute__((weak)) get_locale_narrow_date_field_mapping(StringView, StringView) { return {}; }
Optional<StringView> __attribute__((weak)) get_locale_key_mapping(StringView, StringView) { return {}; }
// https://www.unicode.org/reports/tr35/tr35-39/tr35-general.html#Display_Name_Elements
Optional<String> format_locale_for_display(StringView locale, LocaleID locale_id)
{
auto language_id = move(locale_id.language_id);
VERIFY(language_id.language.has_value());
auto patterns = Unicode::get_locale_display_patterns(locale);
if (!patterns.has_value())
return {};
auto primary_tag = get_locale_language_mapping(locale, *language_id.language).value_or(*language_id.language);
Optional<StringView> script;
Optional<StringView> region;
if (language_id.script.has_value())
script = get_locale_script_mapping(locale, *language_id.script).value_or(*language_id.script);
if (language_id.region.has_value())
region = get_locale_territory_mapping(locale, *language_id.region).value_or(*language_id.region);
Optional<String> secondary_tag;
if (script.has_value() && region.has_value())
secondary_tag = patterns->locale_separator.replace("{0}"sv, *script).replace("{1}"sv, *region);
else if (script.has_value())
secondary_tag = *script;
else if (region.has_value())
secondary_tag = *region;
if (!secondary_tag.has_value())
return primary_tag;
return patterns->locale_pattern.replace("{0}"sv, primary_tag).replace("{1}"sv, *secondary_tag);
}
Vector<StringView> get_locale_key_mapping_list(StringView locale, StringView keyword)
{
if (keyword == "hc"sv) {