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diff --git a/i18npool/source/calendar/calendarImpl.cxx b/i18npool/source/calendar/calendarImpl.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <calendarImpl.hxx>
+#include <calendar_gregorian.hxx>
+#include <localedata.hxx>
+#include <comphelper/processfactory.hxx>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::i18n;
+
+namespace i18npool {
+
+CalendarImpl::CalendarImpl() : m_xContext(comphelper::getProcessComponentContext())
+{
+}
+
+CalendarImpl::CalendarImpl(const Reference< XComponentContext > &rxContext) : m_xContext(rxContext)
+{
+ if (!m_xContext.is())
+ throw RuntimeException("CalendarImpl::CalendarImpl: empty m_xContext");
+}
+
+CalendarImpl::~CalendarImpl()
+{
+}
+
+void SAL_CALL
+CalendarImpl::loadDefaultCalendarTZ( const css::lang::Locale& rLocale, const OUString& rTimeZone )
+{
+ const Sequence< Calendar2 > xC = LocaleDataImpl::get()->getAllCalendars2(rLocale);
+ auto pCal = std::find_if(xC.begin(), xC.end(), [](const Calendar2& rCal) { return rCal.Default; });
+ if (pCal == xC.end())
+ throw RuntimeException("CalendarImpl::loadDefaultCalendarTZ: no default calendar found for this locale");
+ loadCalendarTZ(pCal->Name, rLocale, rTimeZone);
+}
+
+void SAL_CALL
+CalendarImpl::loadCalendarTZ( const OUString& uniqueID, const css::lang::Locale& rLocale, const OUString& rTimeZone )
+{
+ Reference < XCalendar4 > xOldCalendar( xCalendar ); // backup
+ const OUString aCacheID( uniqueID + "_" + rTimeZone);
+ bool bTimeZone = true;
+ sal_Int32 i;
+
+ for (i = 0; i < sal::static_int_cast<sal_Int32>(lookupTable.size()); i++) {
+ lookupTableItem &listItem = lookupTable[i];
+ if (aCacheID == listItem.m_aCacheID) {
+ xCalendar = listItem.xCalendar;
+ break;
+ }
+ }
+
+ if (i >= sal::static_int_cast<sal_Int32>(lookupTable.size())) {
+ Reference < XInterface > xI = m_xContext->getServiceManager()->createInstanceWithContext(
+ "com.sun.star.i18n.Calendar_" + uniqueID, m_xContext);
+
+ if ( ! xI.is() ) {
+ // check if the calendar is defined in localedata, load gregorian calendar service.
+ const Sequence< Calendar2 > xC = LocaleDataImpl::get()->getAllCalendars2(rLocale);
+ if (std::any_of(xC.begin(), xC.end(), [&uniqueID](const Calendar2& rCal) { return uniqueID == rCal.Name; }))
+ xI = m_xContext->getServiceManager()->createInstanceWithContext("com.sun.star.i18n.Calendar_gregorian", m_xContext);
+ }
+
+ if ( !xI.is() )
+ throw RuntimeException("CalendarImpl::loadCalendarTZ: no calendar found for this locale");
+ xCalendar.set(xI, UNO_QUERY);
+
+ if (!rTimeZone.isEmpty())
+ {
+ /* XXX NOTE: currently (2019-06-19) calendar implementations derive
+ * from Calendar_gregorian, even Hijri and Jewish. If that should
+ * change in future this should be adapted. */
+ Calendar_gregorian* pCal = dynamic_cast<Calendar_gregorian*>(xCalendar.get());
+ bTimeZone = (pCal && pCal->setTimeZone(rTimeZone));
+ }
+
+ lookupTable.emplace_back( aCacheID, xCalendar );
+ }
+
+ if ( !xCalendar.is() )
+ {
+ xCalendar = xOldCalendar;
+ throw RuntimeException("CalendarImpl::loadCalendarTZ: no calendar found for this locale, should use old one?");
+ }
+
+ try
+ {
+ xCalendar->loadCalendar(uniqueID, rLocale);
+ }
+ catch ( Exception& )
+ { // restore previous calendar and re-throw
+ xCalendar = xOldCalendar;
+ throw;
+ }
+
+ if (!bTimeZone)
+ // The calendar is usable but is not in the expected time zone.
+ throw RuntimeException("CalendarImpl::loadCalendarTZ: the calendar is usable but is not in the expected time zone");
+}
+
+Calendar2 SAL_CALL
+CalendarImpl::getLoadedCalendar2()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getLoadedCalendar2: no calendar");
+ return xCalendar->getLoadedCalendar2();
+}
+
+::css::i18n::Calendar SAL_CALL
+CalendarImpl::getLoadedCalendar()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getLoadedCalendar: no calendar");
+ return xCalendar->getLoadedCalendar();
+}
+
+Sequence< OUString > SAL_CALL
+CalendarImpl::getAllCalendars( const css::lang::Locale& rLocale )
+{
+ const Sequence< Calendar2 > xC = LocaleDataImpl::get()->getAllCalendars2(rLocale);
+ Sequence< OUString > xSeq( xC.getLength() );
+ std::transform(xC.begin(), xC.end(), xSeq.getArray(),
+ [](const Calendar2& rCal) { return rCal.Name; });
+ return xSeq;
+}
+
+void SAL_CALL
+CalendarImpl::setDateTime( double fTimeInDays )
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::setDateTime: no calendar");
+ xCalendar->setDateTime( fTimeInDays );
+}
+
+double SAL_CALL
+CalendarImpl::getDateTime()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getDateTime: no calendar");
+ return xCalendar->getDateTime();
+}
+
+void SAL_CALL
+CalendarImpl::setLocalDateTime( double fTimeInDays )
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::setLocalDateTime: no calendar");
+ xCalendar->setLocalDateTime( fTimeInDays );
+}
+
+double SAL_CALL
+CalendarImpl::getLocalDateTime()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getLocalDateTime: no calendar");
+ return xCalendar->getLocalDateTime();
+}
+
+void SAL_CALL CalendarImpl::loadDefaultCalendar( const css::lang::Locale& rLocale )
+{
+ loadDefaultCalendarTZ( rLocale, OUString());
+}
+
+void SAL_CALL CalendarImpl::loadCalendar( const OUString& uniqueID, const css::lang::Locale& rLocale )
+{
+ loadCalendarTZ( uniqueID, rLocale, OUString());
+}
+
+OUString SAL_CALL
+CalendarImpl::getUniqueID()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getUniqueID: no calendar");
+ return xCalendar->getUniqueID();
+}
+
+void SAL_CALL
+CalendarImpl::setValue( sal_Int16 fieldIndex, sal_Int16 value )
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::setValue: no calendar");
+ xCalendar->setValue( fieldIndex, value );
+}
+
+sal_Int16 SAL_CALL
+CalendarImpl::getValue( sal_Int16 fieldIndex )
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getValue: no calendar");
+ return xCalendar->getValue( fieldIndex );
+}
+
+void SAL_CALL
+CalendarImpl::addValue( sal_Int16 fieldIndex, sal_Int32 amount )
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::addValue: no calendar");
+ xCalendar->addValue( fieldIndex, amount);
+}
+
+sal_Int16 SAL_CALL
+CalendarImpl::getFirstDayOfWeek()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getFirstDayOfWeek: no calendar");
+ return xCalendar->getFirstDayOfWeek();
+}
+
+void SAL_CALL
+CalendarImpl::setFirstDayOfWeek( sal_Int16 day )
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::setFirstDayOfWeek: no calendar");
+ xCalendar->setFirstDayOfWeek(day);
+}
+
+void SAL_CALL
+CalendarImpl::setMinimumNumberOfDaysForFirstWeek( sal_Int16 days )
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::setMinimumNumberOfDaysForFirstWeek: no calendar");
+ xCalendar->setMinimumNumberOfDaysForFirstWeek(days);
+}
+
+sal_Int16 SAL_CALL
+CalendarImpl::getMinimumNumberOfDaysForFirstWeek()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getMinimumNumberOfDaysForFirstWeek: no calendar");
+ return xCalendar->getMinimumNumberOfDaysForFirstWeek();
+}
+
+
+OUString SAL_CALL
+CalendarImpl::getDisplayName( sal_Int16 displayIndex, sal_Int16 idx, sal_Int16 nameType )
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getDisplayName: no calendar");
+ return xCalendar->getDisplayName( displayIndex, idx, nameType );
+}
+
+sal_Int16 SAL_CALL
+CalendarImpl::getNumberOfMonthsInYear()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::setDisplayName: no calendar");
+ return xCalendar->getNumberOfMonthsInYear();
+}
+
+
+sal_Int16 SAL_CALL
+CalendarImpl::getNumberOfDaysInWeek()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getNumberOfDaysInWeek: no calendar");
+ return xCalendar->getNumberOfDaysInWeek();
+}
+
+
+Sequence< CalendarItem > SAL_CALL
+CalendarImpl::getDays()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::setNumberOfDaysInWeek: no calendar");
+ return xCalendar->getDays();
+}
+
+
+Sequence< CalendarItem > SAL_CALL
+CalendarImpl::getMonths()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getMonths: no calendar");
+ return xCalendar->getMonths();
+}
+
+
+Sequence< CalendarItem2 > SAL_CALL
+CalendarImpl::getDays2()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getDays2: no calendar");
+ return xCalendar->getDays2();
+}
+
+
+Sequence< CalendarItem2 > SAL_CALL
+CalendarImpl::getMonths2()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getMonths2: no calendar");
+ return xCalendar->getMonths2();
+}
+
+
+Sequence< CalendarItem2 > SAL_CALL
+CalendarImpl::getGenitiveMonths2()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getGenitiveMonths2: no calendar");
+ return xCalendar->getGenitiveMonths2();
+}
+
+
+Sequence< CalendarItem2 > SAL_CALL
+CalendarImpl::getPartitiveMonths2()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getPartitiveMonths2: no calendar");
+ return xCalendar->getPartitiveMonths2();
+}
+
+
+sal_Bool SAL_CALL
+CalendarImpl::isValid()
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::isValid: no calendar");
+ return xCalendar->isValid();
+}
+
+OUString SAL_CALL
+CalendarImpl::getDisplayString( sal_Int32 nCalendarDisplayCode, sal_Int16 nNativeNumberMode )
+{
+ if (!xCalendar.is())
+ throw RuntimeException("CalendarImpl::getDisplayString: no calendar");
+ return xCalendar->getDisplayString(nCalendarDisplayCode, nNativeNumberMode);
+}
+
+OUString SAL_CALL
+CalendarImpl::getImplementationName()
+{
+ return "com.sun.star.i18n.CalendarImpl";
+}
+
+sal_Bool SAL_CALL
+CalendarImpl::supportsService(const OUString& rServiceName)
+{
+ return cppu::supportsService(this, rServiceName);
+}
+
+Sequence< OUString > SAL_CALL
+CalendarImpl::getSupportedServiceNames()
+{
+ return { "com.sun.star.i18n.LocaleCalendar", "com.sun.star.i18n.LocaleCalendar2" };
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */