mirror of
https://github.com/RGBCube/serenity
synced 2025-05-22 21:25:07 +00:00
a2f1d79765
Just like the previous Temporal.{Instant,TimeZone} commits, this patch
adds the Calendar object itself, its constructor and prototype
(currently empty), and two required abstract operations.
101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibJS/Runtime/AbstractOperations.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
#include <LibJS/Runtime/Temporal/Calendar.h>
|
|
#include <LibJS/Runtime/Temporal/CalendarConstructor.h>
|
|
#include <LibJS/Runtime/Value.h>
|
|
|
|
namespace JS::Temporal {
|
|
|
|
// 12 Temporal.Calendar Objects, https://tc39.es/proposal-temporal/#sec-temporal-calendar-objects
|
|
Calendar::Calendar(String identifier, Object& prototype)
|
|
: Object(prototype)
|
|
, m_identifier(move(identifier))
|
|
{
|
|
}
|
|
|
|
// 12.1.1 CreateTemporalCalendar ( identifier [ , newTarget ] ), https://tc39.es/proposal-temporal/#sec-temporal-createtemporalcalendar
|
|
Calendar* create_temporal_calendar(GlobalObject& global_object, String const& identifier, FunctionObject* new_target)
|
|
{
|
|
auto& vm = global_object.vm();
|
|
|
|
// 1. Assert: ! IsBuiltinCalendar(identifier) is true.
|
|
VERIFY(is_builtin_calendar(identifier));
|
|
|
|
// 2. If newTarget is not provided, set newTarget to %Temporal.Calendar%.
|
|
if (!new_target)
|
|
new_target = global_object.temporal_calendar_constructor();
|
|
|
|
// 3. Let object be ? OrdinaryCreateFromConstructor(newTarget, "%Temporal.Calendar.prototype%", « [[InitializedTemporalCalendar]], [[Identifier]] »).
|
|
// 4. Set object.[[Identifier]] to identifier.
|
|
auto* object = ordinary_create_from_constructor<Calendar>(global_object, *new_target, &GlobalObject::temporal_calendar_prototype, identifier);
|
|
if (vm.exception())
|
|
return {};
|
|
|
|
// 5. Return object.
|
|
return object;
|
|
}
|
|
|
|
// 12.1.2 IsBuiltinCalendar ( id ), https://tc39.es/proposal-temporal/#sec-temporal-isbuiltincalendar
|
|
// NOTE: This is the minimum IsBuiltinCalendar implementation for engines without ECMA-402.
|
|
bool is_builtin_calendar(String const& identifier)
|
|
{
|
|
// 1. If id is not "iso8601", return false.
|
|
if (identifier != "iso8601"sv)
|
|
return false;
|
|
|
|
// 2. Return true.
|
|
return true;
|
|
}
|
|
|
|
// 12.1.30 IsISOLeapYear ( year ), https://tc39.es/proposal-temporal/#sec-temporal-isisoleapyear
|
|
bool is_iso_leap_year(i32 year)
|
|
{
|
|
// 1. Assert: year is an integer.
|
|
|
|
// 2. If year modulo 4 ≠ 0, return false.
|
|
if (year % 4 != 0)
|
|
return false;
|
|
|
|
// 3. If year modulo 400 = 0, return true.
|
|
if (year % 400 == 0)
|
|
return true;
|
|
|
|
// 4. If year modulo 100 = 0, return false.
|
|
if (year % 100 == 0)
|
|
return false;
|
|
|
|
// 5. Return true.
|
|
return true;
|
|
}
|
|
|
|
// 12.1.32 ISODaysInMonth ( year, month ), https://tc39.es/proposal-temporal/#sec-temporal-isodaysinmonth
|
|
i32 iso_days_in_month(i32 year, i32 month)
|
|
{
|
|
// 1. Assert: year is an integer.
|
|
|
|
// 2. Assert: month is an integer, month ≥ 1, and month ≤ 12.
|
|
VERIFY(month >= 1 && month <= 12);
|
|
|
|
// 3. If month is 1, 3, 5, 7, 8, 10, or 12, return 31.
|
|
if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12)
|
|
return 31;
|
|
|
|
// 4. If month is 4, 6, 9, or 11, return 30.
|
|
if (month == 4 || month == 6 || month == 9 || month == 11)
|
|
return 30;
|
|
|
|
// 5. If ! IsISOLeapYear(year) is true, return 29.
|
|
if (is_iso_leap_year(year))
|
|
return 29;
|
|
|
|
// 6. Return 28.
|
|
return 28;
|
|
}
|
|
|
|
}
|