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LibUnicode: Parse and generate available candidate format patterns

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These formats are used by ECMA-402 when neither a date nor time style is
specified. In that case, these patterns are searched for a best match.
This commit is contained in:
Timothy Flynn 2021-11-27 17:31:31 -05:00 committed by Linus Groh
parent 287d43f4be
commit 7872934861
Notes: sideshowbarker 2024-07-17 23:22:44 +09:00 
Author: https://github.com/trflynn89
Commit: https://github.com/SerenityOS/serenity/commit/7872934861f
Pull-request: https://github.com/SerenityOS/serenity/pull/11128
Reviewed-by: https://github.com/linusg ✅
3 changed files with 50 additions and 1 deletions
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40
Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeDateTimeFormat.cpp
View file

@ -38,6 +38,7 @@ struct Calendar {
CalendarFormat date_formats {};
CalendarFormat time_formats {};
CalendarFormat date_time_formats {};
Vector<CalendarPattern> available_formats {};
};
struct Locale {
@ -53,6 +54,8 @@ struct UnicodeLocaleData {
// FIXME: Aliases should come from BCP47. See: https://unicode-org.atlassian.net/browse/CLDR-15158
{ "gregorian"sv, "gregory"sv },
};
size_t max_available_formats_size { 0 };
};
static void parse_date_time_pattern(CalendarPattern& format, String pattern, UnicodeLocaleData& locale_data)
@ -114,6 +117,15 @@ static ErrorOr<void> parse_calendars(String locale_calendars_path, UnicodeLocale
auto const& date_time_formats_object = value.as_object().get("dateTimeFormats"sv);
parse_patterns(calendar.date_time_formats, date_time_formats_object.as_object());
auto const& available_formats = date_time_formats_object.as_object().get("availableFormats"sv);
available_formats.as_object().for_each_member([&](auto const&, JsonValue const& pattern) {
CalendarPattern format {};
parse_date_time_pattern(format, pattern.as_string(), locale_data);
calendar.available_formats.append(move(format));
});
locale_data.max_available_formats_size = max(locale_data.max_available_formats_size, calendar.available_formats.size());
});
return {};
@ -181,6 +193,7 @@ Optional<Calendar> calendar_from_string(StringView calendar);
Optional<Unicode::CalendarFormat> get_calendar_date_format(StringView locale, StringView calendar);
Optional<Unicode::CalendarFormat> get_calendar_time_format(StringView locale, StringView calendar);
Optional<Unicode::CalendarFormat> get_calendar_date_time_format(StringView locale, StringView calendar);
Vector<Unicode::CalendarPattern> get_calendar_available_formats(StringView locale, StringView calendar);
}
@ -195,6 +208,7 @@ static void generate_unicode_locale_implementation(Core::File& file, UnicodeLoca
StringBuilder builder;
SourceGenerator generator { builder };
generator.set("string_index_type"sv, s_string_index_type);
generator.set("available_formats_size"sv, String::number(locale_data.max_available_formats_size));
generator.append(R"~~~(
#include <AK/Array.h>
@ -242,6 +256,8 @@ struct CalendarData {
CalendarFormat date_formats {};
CalendarFormat time_formats {};
CalendarFormat date_time_formats {};
Array<CalendarPattern, @available_formats_size@> available_formats {};
size_t available_formats_size { 0 };
};
)~~~");
@ -281,7 +297,15 @@ static constexpr Array<CalendarData, @size@> @name@ { {)~~~");
append_calendar_format(calendar.time_formats);
generator.append(" ");
append_calendar_format(calendar.date_time_formats);
generator.append(" },");
generator.append(" {{");
for (auto const& format : calendar.available_formats) {
generator.append(" ");
append_calendar_pattern(format);
}
generator.set("size", String::number(calendar.available_formats.size()));
generator.append(" }}, @size@ },");
}
generator.append(R"~~~(
@ -344,6 +368,20 @@ Optional<Unicode::CalendarFormat> get_calendar_date_time_format(StringView local
return {};
}
Vector<Unicode::CalendarPattern> get_calendar_available_formats(StringView locale, StringView calendar)
{
Vector<Unicode::CalendarPattern> result {};
if (auto const* data = find_calendar_data(locale, calendar); data != nullptr) {
result.ensure_capacity(data->available_formats_size);
for (size_t i = 0; i < data->available_formats_size; ++i)
result.unchecked_append(data->available_formats[i].to_unicode_calendar_pattern());
}
return result;
}
}
)~~~");

9
Userland/Libraries/LibUnicode/DateTimeFormat.cpp
View file

@ -63,4 +63,13 @@ Optional<CalendarFormat> get_calendar_format([[maybe_unused]] StringView locale,
#endif
}
Vector<CalendarPattern> get_calendar_available_formats([[maybe_unused]] StringView locale, [[maybe_unused]] StringView calendar)
{
#if ENABLE_UNICODE_DATA
return Detail::get_calendar_available_formats(locale, calendar);
#else
return {};
#endif
}
}

2
Userland/Libraries/LibUnicode/DateTimeFormat.h
View file

@ -10,6 +10,7 @@
#include <AK/String.h>
#include <AK/StringView.h>
#include <AK/Types.h>
#include <AK/Vector.h>
#include <LibUnicode/Forward.h>
namespace Unicode {
@ -56,5 +57,6 @@ struct CalendarFormat {
CalendarPatternStyle calendar_pattern_style_from_string(StringView style);
StringView calendar_pattern_style_to_string(CalendarPatternStyle style);
Optional<CalendarFormat> get_calendar_format(StringView locale, StringView calendar, CalendarFormatType type);
Vector<CalendarPattern> get_calendar_available_formats(StringView locale, StringView calendar);
}