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LibJS: Implement per-locale display of calendars and date-time fields

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Timothy Flynn 2022-01-12 17:55:45 -05:00 • committed by Linus Groh
parent adb762ee48
commit 4875ec26dd
4 changed files with 178 additions and 4 deletions
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37
Userland/Libraries/LibJS/Runtime/Intl/DisplayNames.cpp
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@ -171,16 +171,45 @@ ThrowCompletionOr<Value> canonical_code_for_display_names(GlobalObject& global_o
return js_string(vm, code.to_titlecase_string());
}
// 4. Assert: type is "currency".
// 4. If type is "calendar", then
if (type == DisplayNames::Type::Calendar) {
// a. If code does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
if (!Unicode::is_type_identifier(code))
return vm.throw_completion<RangeError>(global_object, ErrorType::OptionIsNotValidValue, code, "calendar"sv);
// b. Let code be the result of mapping code to lower case as described in 6.1.
// c. Return code.
return js_string(vm, code.to_lowercase_string());
}
// 5. If type is "dateTimeField", then
if (type == DisplayNames::Type::DateTimeField) {
// a. If the result of IsValidDateTimeFieldCode(code) is false, throw a RangeError exception.
if (!is_valid_date_time_field_code(code))
return vm.throw_completion<RangeError>(global_object, ErrorType::OptionIsNotValidValue, code, "dateTimeField"sv);
// b. Return code.
return js_string(vm, code);
}
// 6. Assert: type is "currency".
VERIFY(type == DisplayNames::Type::Currency);
// 5. If ! IsWellFormedCurrencyCode(code) is false, throw a RangeError exception.
// 7. If ! IsWellFormedCurrencyCode(code) is false, throw a RangeError exception.
if (!is_well_formed_currency_code(code))
return vm.throw_completion<RangeError>(global_object, ErrorType::OptionIsNotValidValue, code, "currency"sv);
// 6. Let code be the result of mapping code to upper case as described in 6.1.
// 7. Return code.
// 8. Let code be the result of mapping code to upper case as described in 6.1.
// 9. Return code.
return js_string(vm, code.to_uppercase_string());
}
// 12.2 IsValidDateTimeFieldCode ( field ), https://tc39.es/ecma402/#sec-isvaliddatetimefieldcode
bool is_valid_date_time_field_code(StringView field)
{
// 1. If field is listed in the Code column of Table 8, return true.
// 2. Return false.
return field.is_one_of("era"sv, "year"sv, "quarter"sv, "month"sv, "weekOfYear"sv, "weekday"sv, "day"sv, "dayPeriod"sv, "hour"sv, "minute"sv, "second"sv, "timeZoneName"sv);
}
}