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LibJS: Allow out-of-order date ranges to be formatted

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This is a normative change to the Intl spec:
769df4b
This commit is contained in:
Timothy Flynn 2022-07-26 06:38:35 -04:00 • committed by Tim Flynn
parent 16d189e96b
commit 415742ab98
4 changed files with 60 additions and 29 deletions
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28
Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.cpp
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@ -934,29 +934,25 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_date_time_range_
if (isnan(end))
return vm.throw_completion<RangeError>(global_object, ErrorType::IntlInvalidTime);
// 5. If x is greater than y, throw a RangeError exception.
if (start > end)
return vm.throw_completion<RangeError>(global_object, ErrorType::IntlStartTimeAfterEndTime, start, end);
// 6. Let tm1 be ToLocalTime(x, dateTimeFormat.[[Calendar]], dateTimeFormat.[[TimeZone]]).
// 5. Let tm1 be ToLocalTime(x, dateTimeFormat.[[Calendar]], dateTimeFormat.[[TimeZone]]).
auto start_local_time = TRY(to_local_time(global_object, start, date_time_format.calendar(), date_time_format.time_zone()));
// 7. Let tm2 be ToLocalTime(y, dateTimeFormat.[[Calendar]], dateTimeFormat.[[TimeZone]]).
// 6. Let tm2 be ToLocalTime(y, dateTimeFormat.[[Calendar]], dateTimeFormat.[[TimeZone]]).
auto end_local_time = TRY(to_local_time(global_object, end, date_time_format.calendar(), date_time_format.time_zone()));
// 8. Let rangePatterns be dateTimeFormat.[[RangePatterns]].
// 7. Let rangePatterns be dateTimeFormat.[[RangePatterns]].
auto range_patterns = date_time_format.range_patterns();
// 9. Let rangePattern be undefined.
// 8. Let rangePattern be undefined.
Optional<Unicode::CalendarRangePattern> range_pattern;
// 10. Let dateFieldsPracticallyEqual be true.
// 9. Let dateFieldsPracticallyEqual be true.
bool date_fields_practically_equal = true;
// 11. Let patternContainsLargerDateField be false.
// 10. Let patternContainsLargerDateField be false.
bool pattern_contains_larger_date_field = false;
// 12. While dateFieldsPracticallyEqual is true and patternContainsLargerDateField is false, repeat for each row of Table 4 in order, except the header row:
// 11. While dateFieldsPracticallyEqual is true and patternContainsLargerDateField is false, repeat for each row of Table 4 in order, except the header row:
for_each_range_pattern_field(start_local_time, end_local_time, [&](auto start_value, auto end_value, auto field_name) {
// a. Let fieldName be the name given in the Range Pattern Field column of the row.
@ -1061,7 +1057,7 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_date_time_range_
return IterationDecision::Break;
});
// 13. If dateFieldsPracticallyEqual is true, then
// 12. If dateFieldsPracticallyEqual is true, then
if (date_fields_practically_equal) {
// a. Let pattern be dateTimeFormat.[[Pattern]].
auto const& pattern = date_time_format.pattern();
@ -1083,10 +1079,10 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_date_time_range_
return result;
}
// 14. Let result be a new empty List.
// 13. Let result be a new empty List.
Vector<PatternPartitionWithSource> result;
// 15. If rangePattern is undefined, then
// 14. If rangePattern is undefined, then
if (!range_pattern.has_value()) {
// a. Let rangePattern be rangePatterns.[[Default]].
range_pattern = Unicode::get_calendar_default_range_format(date_time_format.data_locale(), date_time_format.calendar());
@ -1112,7 +1108,7 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_date_time_range_
// step 3 here: https://unicode.org/reports/tr35/tr35-dates.html#intervalFormats
}
// 16. For each Record { [[Pattern]], [[Source]] } rangePatternPart in rangePattern.[[PatternParts]], do
// 15. For each Record { [[Pattern]], [[Source]] } rangePatternPart in rangePattern.[[PatternParts]], do
TRY(for_each_range_pattern_with_source(*range_pattern, [&](auto const& pattern, auto source) -> ThrowCompletionOr<void> {
// a. Let pattern be rangePatternPart.[[Pattern]].
// b. Let source be rangePatternPart.[[Source]].
@ -1141,7 +1137,7 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_date_time_range_
return {};
}));
// 17. Return result.
// 16. Return result.
return result;
}