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// Copyright (C) 2013 John Layt <jlayt@kde.org>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QTIMEZONE_H
#define QTIMEZONE_H
#include <QtCore/qshareddata.h>
#include <QtCore/qlocale.h>
#include <QtCore/qdatetime.h>
#include <chrono>
QT_REQUIRE_CONFIG(timezone);
#if (defined(Q_OS_DARWIN) || defined(Q_QDOC)) && !defined(QT_NO_SYSTEMLOCALE)
Q_FORWARD_DECLARE_CF_TYPE(CFTimeZone);
Q_FORWARD_DECLARE_OBJC_CLASS(NSTimeZone);
#endif
QT_BEGIN_NAMESPACE
class QTimeZonePrivate;
class Q_CORE_EXPORT QTimeZone
{
public:
// Sane UTC offsets range from -14 to +14 hours:
enum {
// No known zone > 12 hrs West of Greenwich (Baker Island, USA)
MinUtcOffsetSecs = -14 * 3600,
// No known zone > 14 hrs East of Greenwich (Kiritimati, Christmas Island, Kiribati)
MaxUtcOffsetSecs = +14 * 3600
};
enum TimeType {
StandardTime = 0,
DaylightTime = 1,
GenericTime = 2
};
enum NameType {
DefaultName = 0,
LongName = 1,
ShortName = 2,
OffsetName = 3
};
struct OffsetData {
QString abbreviation;
QDateTime atUtc;
int offsetFromUtc;
int standardTimeOffset;
int daylightTimeOffset;
};
typedef QList<OffsetData> OffsetDataList;
QTimeZone() noexcept;
explicit QTimeZone(const QByteArray &ianaId);
explicit QTimeZone(int offsetSeconds);
QTimeZone(const QByteArray &zoneId, int offsetSeconds, const QString &name,
const QString &abbreviation, QLocale::Territory territory = QLocale::AnyTerritory,
const QString &comment = QString());
QTimeZone(const QTimeZone &other);
~QTimeZone();
QTimeZone &operator=(const QTimeZone &other);
QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_PURE_SWAP(QTimeZone)
void swap(QTimeZone &other) noexcept
{ d.swap(other.d); }
bool operator==(const QTimeZone &other) const;
bool operator!=(const QTimeZone &other) const;
bool isValid() const;
QByteArray id() const;
QLocale::Territory territory() const;
#if QT_DEPRECATED_SINCE(6, 6)
QT_DEPRECATED_VERSION_X_6_6("Use territory() instead")
QLocale::Country country() const;
#endif
QString comment() const;
QString displayName(const QDateTime &atDateTime,
QTimeZone::NameType nameType = QTimeZone::DefaultName,
const QLocale &locale = QLocale()) const;
QString displayName(QTimeZone::TimeType timeType,
QTimeZone::NameType nameType = QTimeZone::DefaultName,
const QLocale &locale = QLocale()) const;
QString abbreviation(const QDateTime &atDateTime) const;
int offsetFromUtc(const QDateTime &atDateTime) const;
int standardTimeOffset(const QDateTime &atDateTime) const;
int daylightTimeOffset(const QDateTime &atDateTime) const;
bool hasDaylightTime() const;
bool isDaylightTime(const QDateTime &atDateTime) const;
OffsetData offsetData(const QDateTime &forDateTime) const;
bool hasTransitions() const;
OffsetData nextTransition(const QDateTime &afterDateTime) const;
OffsetData previousTransition(const QDateTime &beforeDateTime) const;
OffsetDataList transitions(const QDateTime &fromDateTime, const QDateTime &toDateTime) const;
static QByteArray systemTimeZoneId();
static QTimeZone systemTimeZone();
static QTimeZone utc();
static bool isTimeZoneIdAvailable(const QByteArray &ianaId);
static QList<QByteArray> availableTimeZoneIds();
static QList<QByteArray> availableTimeZoneIds(QLocale::Territory territory);
static QList<QByteArray> availableTimeZoneIds(int offsetSeconds);
static QByteArray ianaIdToWindowsId(const QByteArray &ianaId);
static QByteArray windowsIdToDefaultIanaId(const QByteArray &windowsId);
static QByteArray windowsIdToDefaultIanaId(const QByteArray &windowsId,
QLocale::Territory territory);
static QList<QByteArray> windowsIdToIanaIds(const QByteArray &windowsId);
static QList<QByteArray> windowsIdToIanaIds(const QByteArray &windowsId,
QLocale::Territory territory);
#if (defined(Q_OS_DARWIN) || defined(Q_QDOC)) && !defined(QT_NO_SYSTEMLOCALE)
static QTimeZone fromCFTimeZone(CFTimeZoneRef timeZone);
CFTimeZoneRef toCFTimeZone() const Q_DECL_CF_RETURNS_RETAINED;
static QTimeZone fromNSTimeZone(const NSTimeZone *timeZone);
NSTimeZone *toNSTimeZone() const Q_DECL_NS_RETURNS_AUTORELEASED;
#endif
#if __cpp_lib_chrono >= 201907L || defined(Q_QDOC)
QT_POST_CXX17_API_IN_EXPORTED_CLASS
static QTimeZone fromStdTimeZonePtr(const std::chrono::time_zone *timeZone)
{
if (!timeZone)
return QTimeZone();
const std::string_view timeZoneName = timeZone->name();
return QTimeZone(QByteArrayView(timeZoneName).toByteArray());
}
#endif
private:
QTimeZone(QTimeZonePrivate &dd);
#ifndef QT_NO_DATASTREAM
friend Q_CORE_EXPORT QDataStream &operator<<(QDataStream &ds, const QTimeZone &tz);
#endif
friend class QTimeZonePrivate;
friend class QDateTime;
friend class QDateTimePrivate;
QSharedDataPointer<QTimeZonePrivate> d;
};
Q_DECLARE_TYPEINFO(QTimeZone::OffsetData, Q_RELOCATABLE_TYPE);
Q_DECLARE_SHARED(QTimeZone)
#ifndef QT_NO_DATASTREAM
Q_CORE_EXPORT QDataStream &operator<<(QDataStream &ds, const QTimeZone &tz);
Q_CORE_EXPORT QDataStream &operator>>(QDataStream &ds, QTimeZone &tz);
#endif
#ifndef QT_NO_DEBUG_STREAM
Q_CORE_EXPORT QDebug operator<<(QDebug dbg, const QTimeZone &tz);
#endif
#if __cpp_lib_chrono >= 201907L
// zoned_time
template <typename> // QT_POST_CXX17_API_IN_EXPORTED_CLASS
inline QDateTime QDateTime::fromStdZonedTime(const std::chrono::zoned_time<
std::chrono::milliseconds,
const std::chrono::time_zone *
> &time)
{
const auto sysTime = time.get_sys_time();
const QTimeZone timeZone = QTimeZone::fromStdTimeZonePtr(time.get_time_zone());
return fromMSecsSinceEpoch(sysTime.time_since_epoch().count(), timeZone);
}
#endif
QT_END_NAMESPACE
#endif // QTIMEZONE_H
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