155 lines
6.2 KiB
C++
155 lines
6.2 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2020 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QCALENDAR_BACKEND_P_H
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#define QCALENDAR_BACKEND_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists for the convenience
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// of calendar implementations. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include <QtCore/qobjectdefs.h>
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#include <QtCore/qcalendar.h>
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#include <QtCore/qstringlist.h>
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#include <QtCore/qstring.h>
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#include <QtCore/qmap.h>
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#include <QtCore/private/qlocale_p.h>
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QT_BEGIN_NAMESPACE
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// Locale-related parts, mostly handled in ../text/qlocale.cpp
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struct QCalendarLocale {
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quint16 m_language_id, m_script_id, m_country_id;
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#define rangeGetter(name) \
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QLocaleData::DataRange name() const { return { m_ ## name ## _idx, m_ ## name ## _size }; }
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rangeGetter(longMonthStandalone) rangeGetter(longMonth)
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rangeGetter(shortMonthStandalone) rangeGetter(shortMonth)
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rangeGetter(narrowMonthStandalone) rangeGetter(narrowMonth)
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#undef rangeGetter
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// Month name indexes:
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quint16 m_longMonthStandalone_idx, m_longMonth_idx;
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quint16 m_shortMonthStandalone_idx, m_shortMonth_idx;
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quint16 m_narrowMonthStandalone_idx, m_narrowMonth_idx;
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// Twelve long month names (separated by commas) can add up to more than 256
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// QChars - e.g. kde_TZ gets to 264.
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quint16 m_longMonthStandalone_size, m_longMonth_size;
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quint8 m_shortMonthStandalone_size, m_shortMonth_size;
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quint8 m_narrowMonthStandalone_size, m_narrowMonth_size;
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};
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// Partial implementation, of methods with common forms, in qcalendar.cpp
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class Q_CORE_EXPORT QCalendarBackend
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{
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friend class QCalendar;
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public:
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virtual ~QCalendarBackend();
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virtual QString name() const = 0;
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virtual QCalendar::System calendarSystem() const;
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// Date queries:
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virtual int daysInMonth(int month, int year = QCalendar::Unspecified) const = 0;
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virtual int daysInYear(int year) const;
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virtual int monthsInYear(int year) const;
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virtual bool isDateValid(int year, int month, int day) const;
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// Properties of the calendar:
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virtual bool isLeapYear(int year) const = 0;
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virtual bool isLunar() const = 0;
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virtual bool isLuniSolar() const = 0;
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virtual bool isSolar() const = 0;
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virtual bool isProleptic() const;
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virtual bool hasYearZero() const;
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virtual int maximumDaysInMonth() const;
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virtual int minimumDaysInMonth() const;
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virtual int maximumMonthsInYear() const;
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// Julian Day conversions:
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virtual bool dateToJulianDay(int year, int month, int day, qint64 *jd) const = 0;
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virtual QCalendar::YearMonthDay julianDayToDate(qint64 jd) const = 0;
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// Day of week and week numbering:
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virtual int dayOfWeek(qint64 jd) const;
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// Names of months and week-days (implemented in qlocale.cpp):
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virtual QString monthName(const QLocale &locale, int month, int year,
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QLocale::FormatType format) const;
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virtual QString standaloneMonthName(const QLocale &locale, int month, int year,
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QLocale::FormatType format) const;
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virtual QString weekDayName(const QLocale &locale, int day,
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QLocale::FormatType format) const;
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virtual QString standaloneWeekDayName(const QLocale &locale, int day,
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QLocale::FormatType format) const;
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// Formatting of date-times (implemented in qlocale.cpp):
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virtual QString dateTimeToString(QStringView format, const QDateTime &datetime,
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QDate dateOnly, QTime timeOnly,
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const QLocale &locale) const;
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// Calendar enumeration by name:
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static QStringList availableCalendars();
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protected:
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QCalendarBackend(const QString &name, QCalendar::System id = QCalendar::System::User);
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// Locale support:
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virtual const QCalendarLocale *localeMonthIndexData() const = 0;
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virtual const char16_t *localeMonthData() const = 0;
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bool registerAlias(const QString &name);
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private:
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// QCalendar's access to its registry:
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static const QCalendarBackend *fromName(QStringView name);
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static const QCalendarBackend *fromName(QLatin1String name);
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// QCalendar's access to singletons:
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static const QCalendarBackend *fromEnum(QCalendar::System system);
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};
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QT_END_NAMESPACE
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#endif // QCALENDAR_BACKEND_P_H
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