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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QCALENDAR_BACKEND_P_H
#define QCALENDAR_BACKEND_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of calendar implementations. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qobjectdefs.h>
#include <QtCore/qcalendar.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qstring.h>
#include <QtCore/qmap.h>
#include <QtCore/private/qlocale_p.h>
QT_BEGIN_NAMESPACE
// Locale-related parts, mostly handled in ../text/qlocale.cpp
struct QCalendarLocale {
quint16 m_language_id, m_script_id, m_country_id;
// Month name indexes:
QLocaleData::DataRange m_standalone_short;
QLocaleData::DataRange m_standalone_long;
QLocaleData::DataRange m_standalone_narrow;
QLocaleData::DataRange m_short;
QLocaleData::DataRange m_long;
QLocaleData::DataRange m_narrow;
};
// Partial implementation, of methods with common forms, in qcalendar.cpp
class Q_CORE_EXPORT QCalendarBackend
{
friend class QCalendar;
public:
virtual ~QCalendarBackend();
virtual QString name() const = 0;
virtual QCalendar::System calendarSystem() const;
// Date queries:
virtual int daysInMonth(int month, int year = QCalendar::Unspecified) const = 0;
virtual int daysInYear(int year) const;
virtual int monthsInYear(int year) const;
virtual bool isDateValid(int year, int month, int day) const;
// Properties of the calendar:
virtual bool isLeapYear(int year) const = 0;
virtual bool isLunar() const = 0;
virtual bool isLuniSolar() const = 0;
virtual bool isSolar() const = 0;
virtual bool isProleptic() const;
virtual bool hasYearZero() const;
virtual int maximumDaysInMonth() const;
virtual int minimumDaysInMonth() const;
virtual int maximumMonthsInYear() const;
// Julian Day conversions:
virtual bool dateToJulianDay(int year, int month, int day, qint64 *jd) const = 0;
virtual QCalendar::YearMonthDay julianDayToDate(qint64 jd) const = 0;
// Day of week and week numbering:
virtual int dayOfWeek(qint64 jd) const;
// Names of months and week-days (implemented in qlocale.cpp):
virtual QString monthName(const QLocale &locale, int month, int year,
QLocale::FormatType format) const;
virtual QString standaloneMonthName(const QLocale &locale, int month, int year,
QLocale::FormatType format) const;
virtual QString weekDayName(const QLocale &locale, int day,
QLocale::FormatType format) const;
virtual QString standaloneWeekDayName(const QLocale &locale, int day,
QLocale::FormatType format) const;
// Formatting of date-times (implemented in qlocale.cpp):
virtual QString dateTimeToString(QStringView format, const QDateTime &datetime,
const QDate &dateOnly, const QTime &timeOnly,
const QLocale &locale) const;
// Calendar enumeration by name:
static QStringList availableCalendars();
protected:
QCalendarBackend(const QString &name, QCalendar::System id = QCalendar::System::User);
// Locale support:
virtual const QCalendarLocale *localeMonthIndexData() const = 0;
virtual const ushort *localeMonthData() const = 0;
bool registerAlias(const QString &name);
private:
// QCalendar's access to its registry:
static const QCalendarBackend *fromName(QStringView name);
static const QCalendarBackend *fromName(QLatin1String name);
// QCalendar's access to singletons:
static const QCalendarBackend *fromEnum(QCalendar::System system);
};
QT_END_NAMESPACE
#endif // QCALENDAR_BACKEND_P_H
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