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LibJS: Implement the Extend TimeZoneName Option Proposal

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This is a stage 4 proposal that was recently merged into the main
ECMA-402 spec. See:

1ba5ee7
This commit is contained in:
Timothy Flynn 2022-01-02 14:56:06 -05:00 • committed by Linus Groh
parent 126a3fe180
commit 022b416570
Notes: sideshowbarker 2024-07-17 21:45:56 +09:00
5 changed files with 92 additions and 21 deletions
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81
Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
* Copyright (c) 2021-2022, Tim Flynn <trflynn89@pm.me>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -587,20 +587,23 @@ Optional<Unicode::CalendarPattern> basic_format_matcher(Unicode::CalendarPattern
// 6. Let shortMorePenalty be 3.
constexpr int short_more_penalty = 3;
// 7. Let bestScore be -Infinity.
// 7. Let offsetPenalty be 1.
constexpr int offset_penalty = 1;
// 8. Let bestScore be -Infinity.
int best_score = NumericLimits<int>::min();
// 8. Let bestFormat be undefined.
// 9. Let bestFormat be undefined.
Optional<Unicode::CalendarPattern> best_format;
// 9. Assert: Type(formats) is List.
// 10. For each element format of formats, do
// 10. Assert: Type(formats) is List.
// 11. For each element format of formats, do
for (auto& format : formats) {
// a. Let score be 0.
int score = 0;
// b. For each property name property shown in Table 4, do
format.for_each_calendar_field_zipped_with(options, [&](auto const& format_prop, auto const& options_prop, auto) {
format.for_each_calendar_field_zipped_with(options, [&](auto const& format_prop, auto const& options_prop, auto type) {
using ValueType = typename RemoveReference<decltype(options_prop)>::ValueType;
// i. If options has a field [[<property>]], let optionsProp be options.[[<property>]]; else let optionsProp be undefined.
@ -614,7 +617,62 @@ Optional<Unicode::CalendarPattern> basic_format_matcher(Unicode::CalendarPattern
else if (options_prop.has_value() && !format_prop.has_value()) {
score -= removal_penalty;
}
// v. Else if optionsProp ≠ formatProp, then
// v. Else if property is "timeZoneName", then
else if (type == Unicode::CalendarPattern::Field::TimeZoneName) {
// This is needed to avoid a compile error. Although we only enter this branch for TimeZoneName,
// the lambda we are in will be generated with property types other than CalendarPatternStyle.
auto compare_prop = [](auto prop, auto test) { return prop == static_cast<ValueType>(test); };
// 1. If optionsProp is "short" or "shortGeneric", then
if (compare_prop(options_prop, Unicode::CalendarPatternStyle::Short) || compare_prop(options_prop, Unicode::CalendarPatternStyle::ShortGeneric)) {
// a. If formatProp is "shortOffset", decrease score by offsetPenalty.
if (compare_prop(format_prop, Unicode::CalendarPatternStyle::ShortOffset))
score -= offset_penalty;
// b. Else if formatProp is "longOffset", decrease score by (offsetPenalty + shortMorePenalty).
else if (compare_prop(format_prop, Unicode::CalendarPatternStyle::LongOffset))
score -= offset_penalty + short_more_penalty;
// c. Else if optionsProp is "short" and formatProp is "long", decrease score by shortMorePenalty.
else if (compare_prop(options_prop, Unicode::CalendarPatternStyle::Short) || compare_prop(format_prop, Unicode::CalendarPatternStyle::Long))
score -= short_more_penalty;
// d. Else if optionsProp is "shortGeneric" and formatProp is "longGeneric", decrease score by shortMorePenalty.
else if (compare_prop(options_prop, Unicode::CalendarPatternStyle::ShortGeneric) || compare_prop(format_prop, Unicode::CalendarPatternStyle::LongGeneric))
score -= short_more_penalty;
// e. Else if optionsProp ≠ formatProp, decrease score by removalPenalty.
else if (options_prop != format_prop)
score -= removal_penalty;
}
// 2. Else if optionsProp is "shortOffset" and formatProp is "longOffset", decrease score by shortMorePenalty.
else if (compare_prop(options_prop, Unicode::CalendarPatternStyle::ShortOffset) || compare_prop(format_prop, Unicode::CalendarPatternStyle::LongOffset)) {
score -= short_more_penalty;
}
// 3. Else if optionsProp is "long" or "longGeneric", then
else if (compare_prop(options_prop, Unicode::CalendarPatternStyle::Long) || compare_prop(options_prop, Unicode::CalendarPatternStyle::LongGeneric)) {
// a. If formatProp is "longOffset", decrease score by offsetPenalty.
if (compare_prop(format_prop, Unicode::CalendarPatternStyle::LongOffset))
score -= offset_penalty;
// b. Else if formatProp is "shortOffset", decrease score by (offsetPenalty + longLessPenalty).
else if (compare_prop(format_prop, Unicode::CalendarPatternStyle::ShortOffset))
score -= offset_penalty + long_less_penalty;
// c. Else if optionsProp is "long" and formatProp is "short", decrease score by longLessPenalty.
else if (compare_prop(options_prop, Unicode::CalendarPatternStyle::Long) || compare_prop(format_prop, Unicode::CalendarPatternStyle::Short))
score -= long_less_penalty;
// d. Else if optionsProp is "longGeneric" and formatProp is "shortGeneric", decrease score by longLessPenalty.
else if (compare_prop(options_prop, Unicode::CalendarPatternStyle::LongGeneric) || compare_prop(format_prop, Unicode::CalendarPatternStyle::ShortGeneric))
score -= long_less_penalty;
// e. Else if optionsProp ≠ formatProp, decrease score by removalPenalty.
else if (options_prop != format_prop)
score -= removal_penalty;
}
// 4. Else if optionsProp is "longOffset" and formatProp is "shortOffset", decrease score by longLessPenalty.
else if (compare_prop(options_prop, Unicode::CalendarPatternStyle::LongOffset) || compare_prop(format_prop, Unicode::CalendarPatternStyle::ShortOffset)) {
score -= long_less_penalty;
}
// 5. Else if optionsProp ≠ formatProp, decrease score by removalPenalty.
else if (options_prop != format_prop) {
score -= removal_penalty;
}
}
// vi. Else if optionsProp ≠ formatProp, then
else if (options_prop != format_prop) {
using ValuesType = Conditional<IsIntegral<ValueType>, AK::Array<u8, 3>, AK::Array<Unicode::CalendarPatternStyle, 5>>;
ValuesType values {};
@ -701,7 +759,7 @@ Optional<Unicode::CalendarPattern> basic_format_matcher(Unicode::CalendarPattern
}
});
// 11. Return bestFormat.
// 12. Return bestFormat.
return best_format;
}
@ -881,7 +939,9 @@ ThrowCompletionOr<Vector<PatternPartition>> format_date_time_pattern(GlobalObjec
// ii. Let v be dateTimeFormat.[[TimeZone]].
auto const& value = date_time_format.time_zone();
// iii. Let fv be a String value representing v in the form given by f; the String value depends upon the implementation and the effective locale. The String value may also depend on the value of the [[InDST]] field of tm. If the implementation does not have a localized representation of f, then use the String value of v itself.
// iii. Let fv be a String value representing v in the form given by f; the String value depends upon the implementation and the effective locale of dateTimeFormat.
// The String value may also depend on the value of the [[InDST]] field of tm if f is "short", "long", "shortOffset", or "longOffset".
// If the implementation does not have a localized representation of f, then use the String value of v itself.
// FIXME: This should take [[InDST]] into account.
auto formatted_value = Unicode::get_time_zone_name(data_locale, value, style).value_or(value);
@ -973,6 +1033,9 @@ ThrowCompletionOr<Vector<PatternPartition>> format_date_time_pattern(GlobalObjec
formatted_value = symbol.value_or(String::number(value));
break;
}
default:
VERIFY_NOT_REACHED();
}
// xi. Append a new Record { [[Type]]: p, [[Value]]: fv } as the last element of the list result.