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LibJS: Implement the Temporal.PlainMonthDay constructor
And the simple Temporal.PlainMonthDay.prototype getters, so that the constructed Temporal.PlainMonthDay may actually be validated.
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2024-11-22 00:25:44 +00:00
Author: https://github.com/trflynn89
Commit: 1a386e78c3
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2471
31 changed files with 2515 additions and 4 deletions
132
Libraries/LibJS/Runtime/Temporal/TimeZone.cpp
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132
Libraries/LibJS/Runtime/Temporal/TimeZone.cpp
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/*
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* Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
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* Copyright (c) 2024, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/Date.h>
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#include <LibJS/Runtime/Intl/AbstractOperations.h>
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#include <LibJS/Runtime/Temporal/ISO8601.h>
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#include <LibJS/Runtime/Temporal/TimeZone.h>
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#include <LibJS/Runtime/VM.h>
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namespace JS::Temporal {
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// 11.1.5 FormatOffsetTimeZoneIdentifier ( offsetMinutes [ , style ] ), https://tc39.es/proposal-temporal/#sec-temporal-formatoffsettimezoneidentifier
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String format_offset_time_zone_identifier(i64 offset_minutes, Optional<TimeStyle> style)
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{
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// 1. If offsetMinutes ≥ 0, let sign be the code unit 0x002B (PLUS SIGN); otherwise, let sign be the code unit 0x002D (HYPHEN-MINUS).
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auto sign = offset_minutes >= 0 ? '+' : '-';
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// 2. Let absoluteMinutes be abs(offsetMinutes).
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auto absolute_minutes = abs(offset_minutes);
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// 3. Let hour be floor(absoluteMinutes / 60).
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auto hour = static_cast<u8>(floor(static_cast<double>(absolute_minutes) / 60.0));
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// 4. Let minute be absoluteMinutes modulo 60.
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auto minute = static_cast<u8>(modulo(static_cast<double>(absolute_minutes), 60.0));
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// 5. Let timeString be FormatTimeString(hour, minute, 0, 0, MINUTE, style).
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auto time_string = format_time_string(hour, minute, 0, 0, SecondsStringPrecision::Minute {}, style);
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// 6. Return the string-concatenation of sign and timeString.
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return MUST(String::formatted("{}{}", sign, time_string));
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}
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// 11.1.8 ToTemporalTimeZoneIdentifier ( temporalTimeZoneLike ), https://tc39.es/proposal-temporal/#sec-temporal-totemporaltimezoneidentifier
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ThrowCompletionOr<String> to_temporal_time_zone_identifier(VM& vm, Value temporal_time_zone_like)
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{
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// 1. If temporalTimeZoneLike is an Object, then
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if (temporal_time_zone_like.is_object()) {
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// FIXME: a. If temporalTimeZoneLike has an [[InitializedTemporalZonedDateTime]] internal slot, then
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// FIXME: i. Return temporalTimeZoneLike.[[TimeZone]].
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}
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// 2. If temporalTimeZoneLike is not a String, throw a TypeError exception.
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if (!temporal_time_zone_like.is_string())
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return vm.throw_completion<TypeError>(ErrorType::TemporalInvalidTimeZoneName, temporal_time_zone_like);
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// 3. Let parseResult be ? ParseTemporalTimeZoneString(temporalTimeZoneLike).
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auto parse_result = TRY(parse_temporal_time_zone_string(vm, temporal_time_zone_like.as_string().utf8_string_view()));
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// 4. Let offsetMinutes be parseResult.[[OffsetMinutes]].
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// 5. If offsetMinutes is not empty, return FormatOffsetTimeZoneIdentifier(offsetMinutes).
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if (parse_result.offset_minutes.has_value())
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return format_offset_time_zone_identifier(*parse_result.offset_minutes);
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// 6. Let name be parseResult.[[Name]].
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// 7. Let timeZoneIdentifierRecord be GetAvailableNamedTimeZoneIdentifier(name).
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auto time_zone_identifier_record = Intl::get_available_named_time_zone_identifier(*parse_result.name);
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// 8. If timeZoneIdentifierRecord is empty, throw a RangeError exception.
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if (!time_zone_identifier_record.has_value())
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return vm.throw_completion<RangeError>(ErrorType::TemporalInvalidTimeZoneName, temporal_time_zone_like);
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// 9. Return timeZoneIdentifierRecord.[[Identifier]].
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return time_zone_identifier_record->identifier;
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}
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// 11.1.16 ParseTimeZoneIdentifier ( identifier ), https://tc39.es/proposal-temporal/#sec-parsetimezoneidentifier
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ThrowCompletionOr<TimeZone> parse_time_zone_identifier(VM& vm, StringView identifier)
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{
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// 1. Let parseResult be ParseText(StringToCodePoints(identifier), TimeZoneIdentifier).
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auto parse_result = parse_iso8601(Production::TimeZoneIdentifier, identifier);
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// 2. If parseResult is a List of errors, throw a RangeError exception.
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if (!parse_result.has_value())
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return vm.throw_completion<RangeError>(ErrorType::TemporalInvalidTimeZoneString, identifier);
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return parse_time_zone_identifier(*parse_result);
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}
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// 11.1.16 ParseTimeZoneIdentifier ( identifier ), https://tc39.es/proposal-temporal/#sec-parsetimezoneidentifier
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TimeZone parse_time_zone_identifier(StringView identifier)
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{
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// OPTIMIZATION: Some callers can assume that parsing will succeed.
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// 1. Let parseResult be ParseText(StringToCodePoints(identifier), TimeZoneIdentifier).
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auto parse_result = parse_iso8601(Production::TimeZoneIdentifier, identifier);
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VERIFY(parse_result.has_value());
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return parse_time_zone_identifier(*parse_result);
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}
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// 11.1.16 ParseTimeZoneIdentifier ( identifier ), https://tc39.es/proposal-temporal/#sec-parsetimezoneidentifier
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TimeZone parse_time_zone_identifier(ParseResult const& parse_result)
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{
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// OPTIMIZATION: Some callers will have already parsed and validated the time zone identifier.
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// 3. If parseResult contains a TimeZoneIANAName Parse Node, then
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if (parse_result.time_zone_iana_name.has_value()) {
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// a. Let name be the source text matched by the TimeZoneIANAName Parse Node contained within parseResult.
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// b. NOTE: name is syntactically valid, but does not necessarily conform to IANA Time Zone Database naming
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// guidelines or correspond with an available named time zone identifier.
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// c. Return the Record { [[Name]]: CodePointsToString(name), [[OffsetMinutes]]: empty }.
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return TimeZone { .name = String::from_utf8_without_validation(parse_result.time_zone_iana_name->bytes()), .offset_minutes = {} };
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}
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// 4. Else,
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else {
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// a. Assert: parseResult contains a UTCOffset[~SubMinutePrecision] Parse Node.
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VERIFY(parse_result.time_zone_offset.has_value());
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// b. Let offsetString be the source text matched by the UTCOffset[~SubMinutePrecision] Parse Node contained within parseResult.
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// c. Let offsetNanoseconds be ! ParseDateTimeUTCOffset(offsetString).
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// FIXME: ParseTimeZoneOffsetString should be renamed to ParseDateTimeUTCOffset and updated for Temporal.
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auto offset_nanoseconds = parse_time_zone_offset_string(parse_result.time_zone_offset->source_text);
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// d. Let offsetMinutes be offsetNanoseconds / (60 × 10**9).
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auto offset_minutes = offset_nanoseconds / 60'000'000'000;
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// e. Assert: offsetMinutes is an integer.
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VERIFY(trunc(offset_minutes) == offset_minutes);
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// f. Return the Record { [[Name]]: empty, [[OffsetMinutes]]: offsetMinutes }.
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return TimeZone { .name = {}, .offset_minutes = static_cast<i64>(offset_minutes) };
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}
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}
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}
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