ICU4XChineseBasedCalendar.h

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef intl_components_calendar_ICU4XChineseBasedCalendar_h_

#define intl_components_calendar_ICU4XChineseBasedCalendar_h_

#include "mozilla/intl/calendar/ICU4XCalendar.h"

#include <stdint.h>

#include <string_view>

namespace mozilla::intl::calendar {

/**

 * Abstract base class for Chinese-based calendars.

 * Overrides the same methods as icu::ChineseCalendar to ensure compatible

 * behavior even when using ICU4X as the underlying calendar implementation.

*/

class ICU4XChineseBasedCalendar : public ICU4XCalendar {

 protected:

  ICU4XChineseBasedCalendar(capi::ICU4XAnyCalendarKind kind,

                            const icu::Locale& locale, UErrorCode& success);

  ICU4XChineseBasedCalendar(capi::ICU4XAnyCalendarKind kind,

                            const icu::TimeZone& timeZone,

                            const icu::Locale& locale, UErrorCode& success);

  ICU4XChineseBasedCalendar(const ICU4XChineseBasedCalendar& other);

 public:

  ICU4XChineseBasedCalendar() = delete;

  virtual ~ICU4XChineseBasedCalendar();

 protected:

  bool hasLeapMonths() const override;

  bool hasMonthCode(MonthCode monthCode) const override;

  bool requiresFallbackForExtendedYear(int32_t year) const override;

  bool requiresFallbackForGregorianYear(int32_t year) const override;

/**

   * Difference to the related Gregorian year.

*/

  virtual int32_t relatedYearDifference() const = 0;

  static constexpr int32_t chineseRelatedYearDiff = -2637;

 public:

  bool inTemporalLeapYear(UErrorCode& status) const override;

  int32_t getRelatedYear(UErrorCode& status) const override;

  void setRelatedYear(int32_t year) override;

 protected:

  void handleComputeFields(int32_t julianDay, UErrorCode& status) override;

  int32_t handleGetLimit(UCalendarDateFields field,

                         ELimitType limitType) const override;

  const icu::UFieldResolutionTable* getFieldResolutionTable() const override;

 private:

  static const icu::UFieldResolutionTable CHINESE_DATE_PRECEDENCE[];

};

}  // namespace mozilla::intl::calendar

#endif