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Diffstat (limited to 'src/corelib/tools/qtimezoneprivate_android.cpp')
-rw-r--r-- | src/corelib/tools/qtimezoneprivate_android.cpp | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/src/corelib/tools/qtimezoneprivate_android.cpp b/src/corelib/tools/qtimezoneprivate_android.cpp new file mode 100644 index 0000000000..6178fe935a --- /dev/null +++ b/src/corelib/tools/qtimezoneprivate_android.cpp @@ -0,0 +1,287 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Drew Parsons <dparsons@emerall.com> +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** 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 http://www.qt.io/terms-conditions. For further +** information use the contact form at http://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 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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()) ); + + if (ianaId.isEmpty()) + m_id = systemTimeZoneId(); + else + m_id = ianaId; +} + +QTimeZonePrivate *QAndroidTimeZonePrivate::clone() +{ + 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 daylight 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(); +} + +// Since Android does not provide an API to access transitions, +// dataForLocalTime needs to be reimplemented without direct use of transitions +QTimeZonePrivate::Data QAndroidTimeZonePrivate::dataForLocalTime(qint64 forLocalMSecs) const +{ + if (!androidTimeZone.isValid()) { + return invalidData(); + } else { + qint64 UTCepochMSecs; + + // compare the UTC time with standard offset against normal daylight offset of one hour + qint64 standardUTCMSecs(forLocalMSecs - (standardTimeOffset(forLocalMSecs) * 1000)); + qint64 daylightUTCMsecs; + + // Check if daylight time does apply, + // checking also for daylight time boundaries + if (isDaylightTime(standardUTCMSecs)) { + // If daylight does apply, then standardUTCMSecs will be an hour or so ahead of the real epoch time + // so check that time + daylightUTCMsecs = standardUTCMSecs - daylightTimeOffset(standardUTCMSecs)*1000; + if (isDaylightTime(daylightUTCMsecs)) { + // daylight time confirmed + UTCepochMSecs = daylightUTCMsecs; + } else { + // daylight time has just finished + UTCepochMSecs = standardUTCMSecs; + } + } else { + // Standard time indicated, but check for a false negative. + // Would a standard one-hour daylight offset indicate daylight time? + daylightUTCMsecs = standardUTCMSecs - 3600000; // 3600000 MSECS_PER_HOUR + if (isDaylightTime(daylightUTCMsecs)) { + // daylight time may have just started, + // but double check against timezone's own daylight offset + // (don't necessarily assume a one-hour offset) + daylightUTCMsecs = standardUTCMSecs - daylightTimeOffset(daylightUTCMsecs)*1000; + if (isDaylightTime(daylightUTCMsecs)) { + // daylight time confirmed + UTCepochMSecs = daylightUTCMsecs; + } else { + // false positive, apply standard time after all + UTCepochMSecs = standardUTCMSecs; + } + } else { + // confirmed standard time + UTCepochMSecs = standardUTCMSecs; + } + } + + return data(UTCepochMSecs); + } +} + +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 |