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Diffstat (limited to 'src/corelib/time/qtimezoneprivate_android.cpp')
-rw-r--r-- | src/corelib/time/qtimezoneprivate_android.cpp | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/src/corelib/time/qtimezoneprivate_android.cpp b/src/corelib/time/qtimezoneprivate_android.cpp new file mode 100644 index 0000000000..be4f374fdd --- /dev/null +++ b/src/corelib/time/qtimezoneprivate_android.cpp @@ -0,0 +1,257 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Drew Parsons <dparsons@emerall.com> +** 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtCore/QSet> +#include "qtimezone.h" +#include "qtimezoneprivate_p.h" + +QT_BEGIN_NAMESPACE + +/* + Private + + Android implementation +*/ + +// Create the system default time zone +QAndroidTimeZonePrivate::QAndroidTimeZonePrivate() + : QTimeZonePrivate() +{ + // start with system time zone + androidTimeZone = QJNIObjectPrivate::callStaticObjectMethod("java.util.TimeZone", "getDefault", "()Ljava/util/TimeZone;"); + init("UTC"); +} + +// Create a named time zone +QAndroidTimeZonePrivate::QAndroidTimeZonePrivate(const QByteArray &ianaId) + : QTimeZonePrivate() +{ + init(ianaId); +} + +QAndroidTimeZonePrivate::QAndroidTimeZonePrivate(const QAndroidTimeZonePrivate &other) + : QTimeZonePrivate(other) +{ + androidTimeZone = other.androidTimeZone; + m_id = other.id(); +} + +QAndroidTimeZonePrivate::~QAndroidTimeZonePrivate() +{ +} + + +void QAndroidTimeZonePrivate::init(const QByteArray &ianaId) +{ + QJNIObjectPrivate jo_ianaId = QJNIObjectPrivate::fromString( QString::fromUtf8(ianaId) ); + androidTimeZone = QJNIObjectPrivate::callStaticObjectMethod( "java.util.TimeZone", "getTimeZone", "(Ljava/lang/String;)Ljava/util/TimeZone;", static_cast<jstring>(jo_ianaId.object()) ); + + // Painfully, JNI gives us back a default zone object if it doesn't + // recognize the name; so check for whether ianaId is a recognized name of + // the zone object we got and ignore the zone if not. + // Try checking ianaId against getID(), getDisplayName(): + QJNIObjectPrivate jname = androidTimeZone.callObjectMethod("getID", "()Ljava/lang/String;"); + bool found = (jname.toString().toUtf8() == ianaId); + for (int style = 1; !found && style-- > 0;) { + for (int dst = 1; !found && dst-- > 0;) { + jname = androidTimeZone.callObjectMethod("getDisplayName", "(ZI;)Ljava/lang/String;", + bool(dst), style); + found = (jname.toString().toUtf8() == ianaId); + } + } + + if (!found) + m_id.clear(); + else if (ianaId.isEmpty()) + m_id = systemTimeZoneId(); + else + m_id = ianaId; +} + +QAndroidTimeZonePrivate *QAndroidTimeZonePrivate::clone() const +{ + return new QAndroidTimeZonePrivate(*this); +} + + +QString QAndroidTimeZonePrivate::displayName(QTimeZone::TimeType timeType, QTimeZone::NameType nameType, + const QLocale &locale) const +{ + QString name; + + if (androidTimeZone.isValid()) { + jboolean daylightTime = (timeType == QTimeZone::DaylightTime); // treat QTimeZone::GenericTime as QTimeZone::StandardTime + + // treat all NameTypes as java TimeZone style LONG (value 1), except of course QTimeZone::ShortName which is style SHORT (value 0); + jint style = (nameType == QTimeZone::ShortName ? 0 : 1); + + QJNIObjectPrivate jlanguage = QJNIObjectPrivate::fromString(QLocale::languageToString(locale.language())); + QJNIObjectPrivate jcountry = QJNIObjectPrivate::fromString(QLocale::countryToString(locale.country())); + QJNIObjectPrivate jvariant = QJNIObjectPrivate::fromString(QLocale::scriptToString(locale.script())); + 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())); + + QJNIObjectPrivate jname = androidTimeZone.callObjectMethod("getDisplayName", "(ZILjava/util/Locale;)Ljava/lang/String;", daylightTime, style, jlocale.object()); + + name = jname.toString(); + } + + return name; +} + +QString QAndroidTimeZonePrivate::abbreviation(qint64 atMSecsSinceEpoch) const +{ + if ( isDaylightTime( atMSecsSinceEpoch ) ) + return displayName(QTimeZone::DaylightTime, QTimeZone::ShortName, QLocale() ); + else + return displayName(QTimeZone::StandardTime, QTimeZone::ShortName, QLocale() ); +} + +int QAndroidTimeZonePrivate::offsetFromUtc(qint64 atMSecsSinceEpoch) const +{ + // offsetFromUtc( ) is invoked when androidTimeZone may not yet be set at startup, + // so a validity test is needed here + if ( androidTimeZone.isValid() ) + // the java method getOffset() returns milliseconds, but QTimeZone returns seconds + return androidTimeZone.callMethod<jint>( "getOffset", "(J)I", static_cast<jlong>(atMSecsSinceEpoch) ) / 1000; + else + return 0; +} + +int QAndroidTimeZonePrivate::standardTimeOffset(qint64 atMSecsSinceEpoch) const +{ + // the java method does not use a reference time + Q_UNUSED( atMSecsSinceEpoch ); + if ( androidTimeZone.isValid() ) + // the java method getRawOffset() returns milliseconds, but QTimeZone returns seconds + return androidTimeZone.callMethod<jint>( "getRawOffset" ) / 1000; + else + return 0; +} + +int QAndroidTimeZonePrivate::daylightTimeOffset(qint64 atMSecsSinceEpoch) const +{ + return ( offsetFromUtc(atMSecsSinceEpoch) - standardTimeOffset(atMSecsSinceEpoch) ); +} + +bool QAndroidTimeZonePrivate::hasDaylightTime() const +{ + if ( androidTimeZone.isValid() ) + /* note: the Java function only tests for future DST transtions, not past */ + return androidTimeZone.callMethod<jboolean>("useDaylightTime" ); + else + return false; +} + +bool QAndroidTimeZonePrivate::isDaylightTime(qint64 atMSecsSinceEpoch) const +{ + if ( androidTimeZone.isValid() ) { + QJNIObjectPrivate jDate( "java/util/Date", "(J)V", static_cast<jlong>(atMSecsSinceEpoch) ); + return androidTimeZone.callMethod<jboolean>("inDaylightTime", "(Ljava/util/Date;)Z", jDate.object() ); + } + else + return false; +} + +QTimeZonePrivate::Data QAndroidTimeZonePrivate::data(qint64 forMSecsSinceEpoch) const +{ + if (androidTimeZone.isValid()) { + Data data; + data.atMSecsSinceEpoch = forMSecsSinceEpoch; + data.standardTimeOffset = standardTimeOffset(forMSecsSinceEpoch); + data.offsetFromUtc = offsetFromUtc(forMSecsSinceEpoch); + data.daylightTimeOffset = data.offsetFromUtc - data.standardTimeOffset; + data.abbreviation = abbreviation(forMSecsSinceEpoch); + return data; + } else { + return invalidData(); + } +} + +bool QAndroidTimeZonePrivate::hasTransitions() const +{ + // java.util.TimeZone does not directly provide transitions + return false; +} + +QTimeZonePrivate::Data QAndroidTimeZonePrivate::nextTransition(qint64 afterMSecsSinceEpoch) const +{ + // transitions not available on Android, so return an invalid data object + Q_UNUSED( afterMSecsSinceEpoch ); + return invalidData(); +} + +QTimeZonePrivate::Data QAndroidTimeZonePrivate::previousTransition(qint64 beforeMSecsSinceEpoch) const +{ + // transitions not available on Android, so return an invalid data object + Q_UNUSED( beforeMSecsSinceEpoch ); + return invalidData(); +} + +QByteArray QAndroidTimeZonePrivate::systemTimeZoneId() const +{ + QJNIObjectPrivate androidSystemTimeZone = QJNIObjectPrivate::callStaticObjectMethod("java.util.TimeZone", "getDefault", "()Ljava/util/TimeZone;"); + QJNIObjectPrivate systemTZIdAndroid = androidSystemTimeZone.callObjectMethod<jstring>("getID"); + QByteArray systemTZid = systemTZIdAndroid.toString().toUtf8(); + + return systemTZid; +} + +QList<QByteArray> QAndroidTimeZonePrivate::availableTimeZoneIds() const +{ + QList<QByteArray> availableTimeZoneIdList; + QJNIObjectPrivate androidAvailableIdList = QJNIObjectPrivate::callStaticObjectMethod("java.util.TimeZone", "getAvailableIDs", "()[Ljava/lang/String;"); + + QJNIEnvironmentPrivate jniEnv; + int androidTZcount = jniEnv->GetArrayLength( static_cast<jarray>(androidAvailableIdList.object()) ); + + // need separate jobject and QAndroidJniObject here so that we can delete (DeleteLocalRef) the reference to the jobject + // (or else the JNI reference table fills after 512 entries from GetObjectArrayElement) + jobject androidTZobject; + QJNIObjectPrivate androidTZ; + for (int i=0; i<androidTZcount; i++ ) { + androidTZobject = jniEnv->GetObjectArrayElement( static_cast<jobjectArray>( androidAvailableIdList.object() ), i ); + androidTZ = androidTZobject; + availableTimeZoneIdList.append( androidTZ.toString().toUtf8() ); + jniEnv->DeleteLocalRef(androidTZobject); + } + + return availableTimeZoneIdList; +} + +QT_END_NAMESPACE |