260 lines
10 KiB
C++
260 lines
10 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2019 The Qt Company Ltd.
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** Copyright (C) 2014 Drew Parsons <dparsons@emerall.com>
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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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#include <QtCore/QSet>
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#include "qtimezone.h"
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#include "qtimezoneprivate_p.h"
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QT_BEGIN_NAMESPACE
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/*
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Private
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Android implementation
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*/
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// Create the system default time zone
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QAndroidTimeZonePrivate::QAndroidTimeZonePrivate()
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: QTimeZonePrivate()
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{
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// Keep in sync with systemTimeZoneId():
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androidTimeZone = QJNIObjectPrivate::callStaticObjectMethod(
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"java.util.TimeZone", "getDefault", "()Ljava/util/TimeZone;");
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m_id = androidTimeZone.callObjectMethod("getID", "()Ljava/lang/String;").toString().toUtf8();
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}
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// Create a named time zone
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QAndroidTimeZonePrivate::QAndroidTimeZonePrivate(const QByteArray &ianaId)
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: QTimeZonePrivate()
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{
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init(ianaId);
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}
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QAndroidTimeZonePrivate::QAndroidTimeZonePrivate(const QAndroidTimeZonePrivate &other)
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: QTimeZonePrivate(other)
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{
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androidTimeZone = other.androidTimeZone;
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m_id = other.id();
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}
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QAndroidTimeZonePrivate::~QAndroidTimeZonePrivate()
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{
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}
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void QAndroidTimeZonePrivate::init(const QByteArray &ianaId)
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{
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const QString iana = QString::fromUtf8(ianaId);
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androidTimeZone = QJNIObjectPrivate::callStaticObjectMethod(
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"java.util.TimeZone", "getTimeZone", "(Ljava/lang/String;)Ljava/util/TimeZone;",
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static_cast<jstring>(QJNIObjectPrivate::fromString(iana).object()));
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// The ID or display name of the zone we've got, if it looks like what we asked for:
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const auto match = [iana](const QJNIObjectPrivate &jname) -> QByteArray {
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const QString name = jname.toString();
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if (iana.compare(name, Qt::CaseInsensitive))
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return name.toUtf8();
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return QByteArray();
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};
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// Painfully, JNI gives us back a default zone object if it doesn't
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// recognize the name; so check for whether ianaId is a recognized name of
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// the zone object we got and ignore the zone if not.
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// Try checking ianaId against getID(), getDisplayName():
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m_id = match(androidTimeZone.callObjectMethod("getID", "()Ljava/lang/String;"));
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for (int style = 1; m_id.isEmpty() && style-- > 0;) {
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for (int dst = 1; m_id.isEmpty() && dst-- > 0;) {
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m_id = match(androidTimeZone.callObjectMethod(
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"getDisplayName", "(ZI)Ljava/lang/String;", bool(dst), style));
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}
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}
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}
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QAndroidTimeZonePrivate *QAndroidTimeZonePrivate::clone() const
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{
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return new QAndroidTimeZonePrivate(*this);
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}
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QString QAndroidTimeZonePrivate::displayName(QTimeZone::TimeType timeType, QTimeZone::NameType nameType,
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const QLocale &locale) const
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{
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QString name;
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if (androidTimeZone.isValid()) {
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jboolean daylightTime = (timeType == QTimeZone::DaylightTime); // treat QTimeZone::GenericTime as QTimeZone::StandardTime
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// treat all NameTypes as java TimeZone style LONG (value 1), except of course QTimeZone::ShortName which is style SHORT (value 0);
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jint style = (nameType == QTimeZone::ShortName ? 0 : 1);
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QJNIObjectPrivate jlanguage = QJNIObjectPrivate::fromString(QLocale::languageToString(locale.language()));
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QJNIObjectPrivate jcountry = QJNIObjectPrivate::fromString(QLocale::countryToString(locale.country()));
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QJNIObjectPrivate jvariant = QJNIObjectPrivate::fromString(QLocale::scriptToString(locale.script()));
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QJNIObjectPrivate jlocale("java.util.Locale", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V", static_cast<jstring>(jlanguage.object()), static_cast<jstring>(jcountry.object()), static_cast<jstring>(jvariant.object()));
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QJNIObjectPrivate jname = androidTimeZone.callObjectMethod("getDisplayName", "(ZILjava/util/Locale;)Ljava/lang/String;", daylightTime, style, jlocale.object());
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name = jname.toString();
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}
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return name;
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}
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QString QAndroidTimeZonePrivate::abbreviation(qint64 atMSecsSinceEpoch) const
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{
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if ( isDaylightTime( atMSecsSinceEpoch ) )
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return displayName(QTimeZone::DaylightTime, QTimeZone::ShortName, QLocale() );
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else
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return displayName(QTimeZone::StandardTime, QTimeZone::ShortName, QLocale() );
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}
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int QAndroidTimeZonePrivate::offsetFromUtc(qint64 atMSecsSinceEpoch) const
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{
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// offsetFromUtc( ) is invoked when androidTimeZone may not yet be set at startup,
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// so a validity test is needed here
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if ( androidTimeZone.isValid() )
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// the java method getOffset() returns milliseconds, but QTimeZone returns seconds
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return androidTimeZone.callMethod<jint>( "getOffset", "(J)I", static_cast<jlong>(atMSecsSinceEpoch) ) / 1000;
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else
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return 0;
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}
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int QAndroidTimeZonePrivate::standardTimeOffset(qint64 atMSecsSinceEpoch) const
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{
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// the java method does not use a reference time
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Q_UNUSED( atMSecsSinceEpoch );
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if ( androidTimeZone.isValid() )
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// the java method getRawOffset() returns milliseconds, but QTimeZone returns seconds
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return androidTimeZone.callMethod<jint>( "getRawOffset" ) / 1000;
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else
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return 0;
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}
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int QAndroidTimeZonePrivate::daylightTimeOffset(qint64 atMSecsSinceEpoch) const
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{
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return ( offsetFromUtc(atMSecsSinceEpoch) - standardTimeOffset(atMSecsSinceEpoch) );
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}
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bool QAndroidTimeZonePrivate::hasDaylightTime() const
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{
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if ( androidTimeZone.isValid() )
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/* note: the Java function only tests for future DST transtions, not past */
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return androidTimeZone.callMethod<jboolean>("useDaylightTime" );
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else
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return false;
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}
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bool QAndroidTimeZonePrivate::isDaylightTime(qint64 atMSecsSinceEpoch) const
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{
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if ( androidTimeZone.isValid() ) {
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QJNIObjectPrivate jDate( "java/util/Date", "(J)V", static_cast<jlong>(atMSecsSinceEpoch) );
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return androidTimeZone.callMethod<jboolean>("inDaylightTime", "(Ljava/util/Date;)Z", jDate.object() );
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}
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else
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return false;
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}
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QTimeZonePrivate::Data QAndroidTimeZonePrivate::data(qint64 forMSecsSinceEpoch) const
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{
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if (androidTimeZone.isValid()) {
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Data data;
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data.atMSecsSinceEpoch = forMSecsSinceEpoch;
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data.standardTimeOffset = standardTimeOffset(forMSecsSinceEpoch);
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data.offsetFromUtc = offsetFromUtc(forMSecsSinceEpoch);
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data.daylightTimeOffset = data.offsetFromUtc - data.standardTimeOffset;
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data.abbreviation = abbreviation(forMSecsSinceEpoch);
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return data;
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} else {
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return invalidData();
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}
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}
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bool QAndroidTimeZonePrivate::hasTransitions() const
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{
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// java.util.TimeZone does not directly provide transitions
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return false;
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}
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QTimeZonePrivate::Data QAndroidTimeZonePrivate::nextTransition(qint64 afterMSecsSinceEpoch) const
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{
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// transitions not available on Android, so return an invalid data object
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Q_UNUSED( afterMSecsSinceEpoch );
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return invalidData();
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}
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QTimeZonePrivate::Data QAndroidTimeZonePrivate::previousTransition(qint64 beforeMSecsSinceEpoch) const
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{
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// transitions not available on Android, so return an invalid data object
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Q_UNUSED( beforeMSecsSinceEpoch );
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return invalidData();
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}
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QByteArray QAndroidTimeZonePrivate::systemTimeZoneId() const
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{
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// Keep in sync with default constructor:
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QJNIObjectPrivate androidSystemTimeZone = QJNIObjectPrivate::callStaticObjectMethod(
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"java.util.TimeZone", "getDefault", "()Ljava/util/TimeZone;");
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return androidSystemTimeZone.callObjectMethod<jstring>("getID").toString().toUtf8();
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}
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QList<QByteArray> QAndroidTimeZonePrivate::availableTimeZoneIds() const
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{
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QList<QByteArray> availableTimeZoneIdList;
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QJNIObjectPrivate androidAvailableIdList = QJNIObjectPrivate::callStaticObjectMethod("java.util.TimeZone", "getAvailableIDs", "()[Ljava/lang/String;");
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QJNIEnvironmentPrivate jniEnv;
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int androidTZcount = jniEnv->GetArrayLength( static_cast<jarray>(androidAvailableIdList.object()) );
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// need separate jobject and QAndroidJniObject here so that we can delete (DeleteLocalRef) the reference to the jobject
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// (or else the JNI reference table fills after 512 entries from GetObjectArrayElement)
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jobject androidTZobject;
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QJNIObjectPrivate androidTZ;
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for (int i=0; i<androidTZcount; i++ ) {
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androidTZobject = jniEnv->GetObjectArrayElement( static_cast<jobjectArray>( androidAvailableIdList.object() ), i );
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androidTZ = androidTZobject;
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availableTimeZoneIdList.append( androidTZ.toString().toUtf8() );
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jniEnv->DeleteLocalRef(androidTZobject);
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}
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return availableTimeZoneIdList;
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}
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QT_END_NAMESPACE
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