File indexing completed on 2023-10-03 03:16:18

 /*
     Copyright (c) 2002 Carlos Moro <cfmoro@correo.uniovi.es>
     Copyright (c) 2002 Hans Petter Bieker <bieker@kde.org>
     Copyright 2007, 2008, 2009, 2010 John Layt <john@layt.net>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #include "kcalendarsystem.h"
 #include "kcalendarsystemprivate_p.h"
 
 #include "kconfiggroup.h"
 
 #include <QDateTime>
 
 #include "klocalizedstring.h"
 #include "kdatetime.h"
 #include "kdatetimeformatter_p.h"
 #include "kdatetimeparser_p.h"
 #include "kcalendarera_p.h"
 #include "kcalendarsystemcoptic_p.h"
 #include "kcalendarsystemethiopian_p.h"
 #include "kcalendarsystemgregorian_p.h"
 #include "kcalendarsystemhebrew_p.h"
 #include "kcalendarsystemindiannational_p.h"
 #include "kcalendarsystemislamiccivil_p.h"
 #include "kcalendarsystemjalali_p.h"
 #include "kcalendarsystemjapanese_p.h"
 #include "kcalendarsystemjulian_p.h"
 #include "kcalendarsystemminguo_p.h"
 #include "kcalendarsystemthai_p.h"
 
 KCalendarSystem *KCalendarSystem::create(KLocale::CalendarSystem calendarSystem, const KLocale *locale)
 {
     return create(calendarSystem, KSharedConfig::Ptr(), locale);
 }
 
 KCalendarSystem *KCalendarSystem::create(KLocale::CalendarSystem calendarSystem,
         KSharedConfig::Ptr config,
         const KLocale *locale)
 {
     switch (calendarSystem) {
     case KLocale::GregorianCalendar:
         return new KCalendarSystemGregorian(config, locale);
     case KLocale::CopticCalendar:
         return new KCalendarSystemCoptic(config, locale);
     case KLocale::EthiopianCalendar:
         return new KCalendarSystemEthiopian(config, locale);
     case KLocale::HebrewCalendar:
         return new KCalendarSystemHebrew(config, locale);
     case KLocale::IndianNationalCalendar:
         return new KCalendarSystemIndianNational(config, locale);
     case KLocale::IslamicCivilCalendar:
         return new KCalendarSystemIslamicCivil(config, locale);
     case KLocale::JalaliCalendar:
         return new KCalendarSystemJalali(config, locale);
     case KLocale::JapaneseCalendar:
         return new KCalendarSystemJapanese(config, locale);
     case KLocale::JulianCalendar:
         return new KCalendarSystemJulian(config, locale);
     case KLocale::MinguoCalendar:
         return new KCalendarSystemMinguo(config, locale);
     case KLocale::ThaiCalendar:
         return new KCalendarSystemThai(config, locale);
     default:
         return new KCalendarSystemGregorian(config, locale);
     }
 }
 
 QList<KLocale::CalendarSystem> KCalendarSystem::calendarSystemsList()
 {
     QList<KLocale::CalendarSystem> list;
 
     list.append(KLocale::GregorianCalendar);
     list.append(KLocale::CopticCalendar);
     list.append(KLocale::EthiopianCalendar);
     list.append(KLocale::HebrewCalendar);
     list.append(KLocale::IslamicCivilCalendar);
     list.append(KLocale::IndianNationalCalendar);
     list.append(KLocale::JalaliCalendar);
     list.append(KLocale::JapaneseCalendar);
     list.append(KLocale::JulianCalendar);
     list.append(KLocale::MinguoCalendar);
     list.append(KLocale::ThaiCalendar);
 
     return list;
 }
 
 QString KCalendarSystem::calendarLabel(KLocale::CalendarSystem calendarSystem, const KLocale *locale)
 {
     QStringList languages = locale->languageList();
 
     switch (calendarSystem) {
     case KLocale::GregorianCalendar:
         return ki18nc("@item Calendar system", "Gregorian").toString(languages);
     case KLocale::CopticCalendar:
         return ki18nc("@item Calendar system", "Coptic").toString(languages);
     case KLocale::EthiopianCalendar:
         return ki18nc("@item Calendar system", "Ethiopian").toString(languages);
     case KLocale::HebrewCalendar:
         return ki18nc("@item Calendar system", "Hebrew").toString(languages);
     case KLocale::IslamicCivilCalendar:
         return ki18nc("@item Calendar system", "Islamic / Hijri (Civil)").toString(languages);
     case KLocale::IndianNationalCalendar:
         return ki18nc("@item Calendar system", "Indian National").toString(languages);
     case KLocale::JalaliCalendar:
         return ki18nc("@item Calendar system", "Jalali").toString(languages);
     case KLocale::JapaneseCalendar:
         return ki18nc("@item Calendar system", "Japanese").toString(languages);
     case KLocale::JulianCalendar:
         return ki18nc("@item Calendar system", "Julian").toString(languages);
     case KLocale::MinguoCalendar:
         return ki18nc("@item Calendar system", "Taiwanese").toString(languages);
     case KLocale::ThaiCalendar:
         return ki18nc("@item Calendar system", "Thai").toString(languages);
     }
 
     return ki18nc("@item Calendar system", "Invalid Calendar Type").toString(languages);
 }
 
 // Shared d pointer base class definitions
 
 KCalendarSystemPrivate::KCalendarSystemPrivate(KCalendarSystem *q_ptr)
     : q(q_ptr),
       m_eraList(nullptr),
       m_shortYearWindowStartYear(2000)
 {
 }
 
 KCalendarSystemPrivate::~KCalendarSystemPrivate()
 {
     delete m_eraList;
 }
 
 int KCalendarSystemPrivate::isoWeekNumber(const QDate &date, int *yearNum) const
 {
     int y, m, d;
     q->julianDayToDate(date.toJulianDay(), y, m, d);
 
     QDate firstDayWeek1, lastDay;
     int week;
     int weekDay1, dayOfWeek1InYear;
 
     // let's guess 1st day of 1st week
     firstDayWeek1 = firstDayOfYear(y);
     weekDay1 = dayOfWeek(firstDayWeek1);
 
     // iso 8601: week 1  is the first containing thursday and week starts on monday
     if (weekDay1 > 4 /*Thursday*/) {
         firstDayWeek1 = q->addDays(firstDayWeek1, daysInWeek() - weekDay1 + 1);   // next monday
     }
 
     dayOfWeek1InYear = dayOfYear(firstDayWeek1);
 
     // our date in prev year's week
     if (dayOfYear(date) < dayOfWeek1InYear) {
         if (yearNum) {
             *yearNum = addYears(y, - 1);
         }
         return isoWeeksInYear(addYears(y, - 1));
     }
 
     // let's check if its last week belongs to next year
     lastDay = lastDayOfYear(y);
 
     // if our date is in last week && 1st week in next year has thursday
     if ((dayOfYear(date) >= daysInYear(y) - dayOfWeek(lastDay) + 1)
             && dayOfWeek(lastDay) < 4) {
         if (yearNum) {
             * yearNum = addYears(y, 1);
         }
         week = 1;
     } else {
         // To calculate properly the number of weeks from day a to x let's make a day 1 of week
         if (weekDay1 < 5) {
             firstDayWeek1 = q->addDays(firstDayWeek1, -(weekDay1 - 1));
         }
 
         if (yearNum) {
             * yearNum = y;
         }
 
         week = firstDayWeek1.daysTo(date) / daysInWeek() + 1;
     }
 
     return week;
 }
 
 int KCalendarSystemPrivate::regularWeekNumber(const QDate &date, int weekStartDay, int firstWeekNumber, int *weekYear) const
 {
     int y, m, d;
     q->julianDayToDate(date.toJulianDay(), y, m, d);
 
     int firstWeekDayOffset = (dayOfWeek(date) - weekStartDay + daysInWeek()) % daysInWeek();
     int dayInYear = date.toJulianDay() - firstDayOfYear(y).toJulianDay();   // 0 indexed
     int week = ((dayInYear - firstWeekDayOffset + daysInWeek()) / daysInWeek());
 
     if (dayOfWeek(firstDayOfYear(y)) != weekStartDay) {
         week = week + firstWeekNumber;
     }
 
     if (week < 1) {
         y = y - 1;
         week = regularWeeksInYear(y, weekStartDay, firstWeekNumber);
     }
 
     if (weekYear) {
         *weekYear = y;
     }
 
     return week;
 }
 
 int KCalendarSystemPrivate::simpleWeekNumber(const QDate &date, int *yearNum) const
 {
     int y, m, d;
     q->julianDayToDate(date.toJulianDay(), y, m, d);
     if (yearNum) {
         *yearNum = y;
     }
     return ((date.toJulianDay() - firstDayOfYear(y).toJulianDay()) / daysInWeek()) + 1;
 }
 
 int KCalendarSystemPrivate::isoWeeksInYear(int year) const
 {
     QDate lastDayOfThisYear = lastDayOfYear(year);
 
     int weekYear = year;
     int lastWeekInThisYear = isoWeekNumber(lastDayOfThisYear, &weekYear);
 
     // If error, or the last day of the year is in the first week of next year use the week before
     if (lastWeekInThisYear < 1 || weekYear != year) {
         lastWeekInThisYear = isoWeekNumber(q->addDays(lastDayOfThisYear, -7), &weekYear);
     }
 
     return lastWeekInThisYear;
 }
 
 int KCalendarSystemPrivate::regularWeeksInYear(int year, int weekStartDay, int firstWeekNumber) const
 {
     return regularWeekNumber(lastDayOfYear(year), weekStartDay, firstWeekNumber, nullptr);
 }
 
 int KCalendarSystemPrivate::simpleWeeksInYear(int year) const
 {
     return simpleWeekNumber(lastDayOfYear(year), nullptr);
 }
 
 // Reimplement if special maths handling required, e.g. Hebrew.
 // Works for calendars with constant number of months, or where leap month is last month of year
 // Will not work for Hebrew or others where leap month is inserted in middle of year
 void KCalendarSystemPrivate::dateDifference(const QDate &fromDate, const QDate &toDate,
         int *yearsDiff, int *monthsDiff, int *daysDiff, int *direction) const
 {
     // This could be optimised a little but is left in full as it's easier to understand
     int dy = 0;
     int dm = 0;
     int dd = 0;
     int dir = 1;
 
     if (toDate < fromDate) {
         dateDifference(toDate, fromDate, &dy, &dm, &dd, nullptr);
         dir = -1;
     } else if (toDate > fromDate) {
 
         int fromYear = q->year(fromDate);
         int toYear = q->year(toDate);
         int fromMonth = q->month(fromDate);
         int toMonth = q->month(toDate);
         int fromDay = q->day(fromDate);
         int toDay = q->day(toDate);
 
         int monthsInPrevYear = monthsInYear(addYears(toYear, -1));
         int daysInPrevMonth = q->daysInMonth(q->addMonths(toDate, -1));
         int daysInFromMonth = daysInMonth(fromYear, fromMonth);
         int daysInToMonth = daysInMonth(toYear, toMonth);
 
         // Calculate years difference
         if (toYear == fromYear) {
             dy = 0;
         } else if (toMonth > fromMonth) {
             dy = differenceYearNumbers(fromYear, toYear);
         } else if (toMonth < fromMonth) {
             dy = differenceYearNumbers(fromYear, toYear) - 1;
         } else { // toMonth == fromMonth
             // Allow for last day of month to last day of month and leap days
             // e.g. 2000-02-29 to 2001-02-28 is 1 year not 0 years
             if ((toDay >= fromDay) || (fromDay == daysInFromMonth && toDay == daysInToMonth)) {
                 dy = differenceYearNumbers(fromYear, toYear);
             } else {
                 dy = differenceYearNumbers(fromYear, toYear) - 1;
             }
         }
 
         // Calculate months and days difference
         if (toDay >= fromDay) {
             dm = (monthsInPrevYear + toMonth - fromMonth) % monthsInPrevYear;
             dd = toDay - fromDay;
         } else { // toDay < fromDay
             // Allow for last day of month to last day of month and leap days
             // e.g. 2010-03-31 to 2010-04-30 is 1 month
             //      2000-02-29 to 2001-02-28 is 1 year
             //      2000-02-29 to 2001-03-01 is 1 year 1 day
             int prevMonth = q->month(q->addMonths(toDate, -1));
             if (fromDay == daysInFromMonth && toDay == daysInToMonth) {
                 dm = (monthsInPrevYear + toMonth - fromMonth) % monthsInPrevYear;
                 dd = 0;
             } else if (prevMonth == fromMonth && daysInPrevMonth < daysInFromMonth) {
                 // Special case where fromDate = leap day and toDate in month following but non-leap year
                 // e.g. 2000-02-29 to 2001-03-01 needs to use 29 to calculate day number not 28
                 dm = (monthsInPrevYear + toMonth - fromMonth - 1) % monthsInPrevYear;
                 dd = (daysInFromMonth + toDay - fromDay) % daysInFromMonth;
             } else {
                 dm = (monthsInPrevYear + toMonth - fromMonth - 1) % monthsInPrevYear;
                 dd = (daysInPrevMonth + toDay - fromDay) % daysInPrevMonth;
             }
         }
 
     }
 
     // Only return values if we have a valid pointer
     if (yearsDiff) {
         *yearsDiff = dy;
     }
     if (monthsDiff) {
         *monthsDiff = dm;
     }
     if (daysDiff) {
         *daysDiff = dd;
     }
     if (direction) {
         *direction = dir;
     }
 }
 
 // Reimplement if special maths handling required, e.g. Hebrew
 // Allows for calendars with leap months at end of year but not during year
 int KCalendarSystemPrivate::yearsDifference(const QDate &fromDate, const QDate &toDate) const
 {
     // This could be optimised a little but is left in full as it's easier to understand
     // Alternatively could just call dateDifference(), but this is slightly more efficient
 
     if (toDate < fromDate) {
         return 0 - yearsDifference(toDate, fromDate);
     }
 
     if (toDate == fromDate) {
         return 0;
     }
 
     int fromYear = q->year(fromDate);
     int toYear = q->year(toDate);
 
     if (toYear == fromYear) {
         return 0;
     }
 
     int fromMonth = q->month(fromDate);
     int toMonth = q->month(toDate);
 
     if (toMonth > fromMonth) {
         return differenceYearNumbers(fromYear, toYear);
     }
 
     if (toMonth < fromMonth) {
         return differenceYearNumbers(fromYear, toYear) - 1;
     }
 
     // toMonth == fromMonth
     int fromDay = q->day(fromDate);
     int toDay = q->day(toDate);
 
     // Adjust for month numbers in from and to year
     // Allow for last day of month to last day of month and leap days
     // e.g. 2000-02-29 to 2001-02-28 is 1 year not 0 years
     if ((toDay >= fromDay) ||
             (fromDay == daysInMonth(fromYear, fromMonth) &&
              toDay == daysInMonth(toYear, toMonth))) {
         return differenceYearNumbers(fromYear, toYear);
     } else {
         return differenceYearNumbers(fromYear, toYear) - 1;
     }
 
 }
 
 // Reimplement if special maths handling required, e.g. maybe Hebrew?
 // Allows for calendars with leap months
 int KCalendarSystemPrivate::monthsDifference(const QDate &fromDate, const QDate &toDate) const
 {
     if (toDate < fromDate) {
         return 0 - monthsDifference(toDate, fromDate);
     }
 
     if (toDate == fromDate) {
         return 0;
     }
 
     int fromYear = q->year(fromDate);
     int toYear = q->year(toDate);
     int fromMonth = q->month(fromDate);
     int toMonth = q->month(toDate);
     int fromDay = q->day(fromDate);
     int toDay = q->day(toDate);
 
     int monthsInPreceedingYears;
 
     // Calculate number of months in full years preceding toYear
     if (toYear == fromYear) {
         monthsInPreceedingYears = 0;
     } else if (hasLeapMonths()) {
         monthsInPreceedingYears = 0;
         for (int y = fromYear; y < toYear; y = addYears(y, 1)) {
             monthsInPreceedingYears = monthsInPreceedingYears + monthsInYear(y);
         }
     } else {
         monthsInPreceedingYears = differenceYearNumbers(fromYear, toYear) * monthsInYear(toYear);
     }
 
     // Adjust for months in from and to year
     // Allow for last day of month to last day of month and leap days
     // e.g. 2010-03-31 to 2010-04-30 is 1 month not 0 months
     // also 2000-02-29 to 2001-02-28 is 12 months not 11 months
     if ((toDay >= fromDay) ||
             (fromDay == daysInMonth(fromYear, fromMonth) &&
              toDay == daysInMonth(toYear, toMonth))) {
         return monthsInPreceedingYears + toMonth - fromMonth;
     } else {
         return monthsInPreceedingYears + toMonth - fromMonth - 1;
     }
 }
 
 // Reimplement if special string to integer handling required, e.g. Hebrew.
 // Peel a number off the front of a string which may have other trailing chars after the number
 // Stop either at either maxLength, eos, or first non-digit char
 int KCalendarSystemPrivate::integerFromString(const QString &string, int maxLength, int &readLength) const
 {
     int value = -1;
     int position = 0;
     readLength = 0;
     bool ok = false;
 
     if (maxLength < 0) {
         maxLength = string.length();
     }
 
     while (position < string.length() &&
             position < maxLength &&
             string.at(position).isDigit()) {
         position++;
     }
 
     if (position > 0) {
         value = string.left(position).toInt(&ok);
         if (ok) {
             readLength = position;
         } else {
             value = -1;
         }
     }
 
     return value;
 }
 
 // Reimplement if special integer to string handling required, e.g. Hebrew.
 // Utility to convert an integer into the correct display string form
 QString KCalendarSystemPrivate::stringFromInteger(int number, int padWidth, QChar padChar) const
 {
     return stringFromInteger(number, padWidth, padChar, q->locale()->dateTimeDigitSet());
 }
 
 // Reimplement if special integer to string handling required, e.g. Hebrew.
 // Utility to convert an integer into the correct display string form
 QString KCalendarSystemPrivate::stringFromInteger(int number, int padWidth, QChar padChar, KLocale::DigitSet digitSet) const
 {
     if (padChar == QLatin1Char('\0') || padWidth == 0) {
         return q->locale()->convertDigits(QString::number(number), digitSet);
     } else {
         return q->locale()->convertDigits(QString::number(number).rightJustified(padWidth, padChar), digitSet);
     }
 }
 
 // Utility to correctly add years to a year number because some systems such as
 // Julian and Gregorian calendars don't have a year 0
 int KCalendarSystemPrivate::addYears(int originalYear, int addYears) const
 {
     int newYear = originalYear + addYears;
 
     if (!hasYearZero()) {
         if (originalYear > 0 && newYear <= 0) {
             newYear = newYear - 1;
         } else if (originalYear < 0 && newYear >= 0) {
             newYear = newYear + 1;
         }
     }
 
     return newYear;
 }
 
 // Utility to correctly return number of years between two year numbers because some systems such as
 // Julian and Gregorian calendars don't have a year 0
 int KCalendarSystemPrivate::differenceYearNumbers(int fromYear, int toYear) const
 {
     int dy = toYear - fromYear;
 
     if (!hasYearZero()) {
         if (toYear > 0 && fromYear < 0) {
             dy = dy - 1;
         } else if (toYear < 0 && fromYear > 0) {
             dy = dy + 1;
         }
     }
 
     return dy;
 }
 
 QString KCalendarSystemPrivate::simpleDateString(const QString &str) const
 {
     QString newStr;
     newStr.reserve(str.length());
     for (int i = 0; i < str.length(); i++) {
         if (str.at(i).isLetterOrNumber()) {
             newStr.append(str.at(i));
         } else {
             newStr.append(QLatin1Char(' '));
         }
     }
 
     return newStr.simplified();
 }
 
 // If we ever want to support a calendar system with another week length,this
 // method can be changed to virtual. Doing so will, however, likely break some
 // code, so don't do that without testing and fixing at least all of KDE SC.
 int KCalendarSystemPrivate::daysInWeek() const
 {
     return 7;
 }
 
 int KCalendarSystemPrivate::dayOfYear(const QDate &date) const
 {
     qint64 jdFirstDayOfYear;
     int y, m, d;
     q->julianDayToDate(date.toJulianDay(), y, m, d);
     q->dateToJulianDay(y, 1, 1, jdFirstDayOfYear);
     //Take the jd of the given date, and subtract the jd of the first day of that year
     return (date.toJulianDay() - jdFirstDayOfYear + 1);
 }
 
 // This assumes all calendar systems agree on the day of week for a given
 // julian day number. That is true of all current calendar systems. If we
 // ever want to support one for which it isn't this implementation can be
 // changed. Doing so will, however, likely break some code, so don't do that
 // without testing and fixing at least all of KDE SC.
 int KCalendarSystemPrivate::dayOfWeek(const QDate &date) const
 {
     return date.dayOfWeek();
 }
 
 QDate KCalendarSystemPrivate::firstDayOfYear(int year) const
 {
     qint64 jd;
     q->dateToJulianDay(year, 1, 1, jd);
     return QDate::fromJulianDay(jd);
 }
 
 QDate KCalendarSystemPrivate::lastDayOfYear(int year) const
 {
     qint64 jd;
     q->dateToJulianDay(year, 1, 1, jd);
     jd = jd + daysInYear(year) - 1;
     return QDate::fromJulianDay(jd);
 }
 
 QDate KCalendarSystemPrivate::firstDayOfMonth(int year, int month) const
 {
     qint64 jd;
     q->dateToJulianDay(year, month, 1, jd);
     return QDate::fromJulianDay(jd);
 }
 
 QDate KCalendarSystemPrivate::lastDayOfMonth(int year, int month) const
 {
     qint64 jd;
     q->dateToJulianDay(year, month, 1, jd);
     jd = jd + daysInMonth(year, month) - 1;
     return QDate::fromJulianDay(jd);
 }
 
 const KLocale *KCalendarSystemPrivate::locale() const
 {
     if (m_locale) {
         return m_locale;
     } else {
         return KLocale::global();
     }
 }
 
 QList<KCalendarEra> *KCalendarSystemPrivate::eraList() const
 {
     return m_eraList;
 }
 
 KCalendarEra KCalendarSystemPrivate::era(const QDate &eraDate) const
 {
     for (int i = m_eraList->count() - 1; i >= 0; --i) {
         if (m_eraList->at(i).isInEra(eraDate)) {
             return m_eraList->at(i);
         }
     }
     return KCalendarEra();
 }
 
 KCalendarEra KCalendarSystemPrivate::era(const QString &eraName, int yearInEra) const
 {
     Q_UNUSED(yearInEra)
 
     for (int i = m_eraList->count() - 1; i >= 0; --i) {
         KCalendarEra era = m_eraList->at(i);
         if (era.name(KLocale::LongName).toLower() == eraName.toLower() ||
                 era.name(KLocale::ShortName).toLower() == eraName.toLower()) {
             return era;
         }
     }
     return KCalendarEra();
 }
 
 void KCalendarSystemPrivate::loadEraList(const KConfigGroup &cg)
 {
     delete m_eraList;
     m_eraList = new QList<KCalendarEra>;
     QString eraKey = QString::fromLatin1("Era1");
     int i = 1;
     while (cg.hasKey(eraKey)) {
         QString eraEntry = cg.readEntry(eraKey, QString());
         if (!eraEntry.isEmpty()) {
             // Based on LC_TIME, but different!
             // Includes long and short names, uses ISO fomat dates
             // e.g. +:1:0001-01-01:9999-12-31:Anno Domini:AD:%EC %Ey
             QChar direction = eraEntry.section(QLatin1Char(':'), 0, 0).at(0);
             QDate startDate, endDate;
             int startYear;
             QString buffer = eraEntry.section(QLatin1Char(':'), 2, 2);
             if (buffer.isEmpty()) {
                 if (direction == QLatin1Char('-')) {
                     startDate = q->latestValidDate();
                 } else {
                     startDate = q->earliestValidDate();
                 }
             } else {
                 startDate = q->readDate(buffer, KLocale::IsoFormat);
             }
             if (q->isValid(startDate)) {
                 startYear = q->year(startDate);
             } else {
                 startYear = eraEntry.section(QLatin1Char(':'), 1, 1).toInt();   //Use offset
             }
 
             buffer = eraEntry.section(QLatin1Char(':'), 3, 3);
             if (buffer.isEmpty()) {
                 if (direction == QLatin1Char('-')) {
                     endDate = q->earliestValidDate();
                 } else {
                     endDate = q->latestValidDate();
                 }
             } else {
                 endDate = q->readDate(buffer, KLocale::IsoFormat);
             }
             addEra(direction.toLatin1(), eraEntry.section(QLatin1Char(':'), 1, 1).toInt(),
                    startDate, startYear, endDate, eraEntry.section(QLatin1Char(':'), 4, 4),
                    eraEntry.section(QLatin1Char(':'), 5, 5), eraEntry.section(QLatin1Char(':'), 6));
         }
         ++i;
         eraKey = QString::fromLatin1("Era%1").arg(i);
     }
 
     if (m_eraList->isEmpty()) {
         loadDefaultEraList();
     }
 }
 
 void KCalendarSystemPrivate::addEra(char direction, int offset,
                                     const QDate &startDate, int startYear, const QDate &endDate,
                                     const QString &name, const QString &shortName,
                                     const QString &format)
 {
     KCalendarEra newEra;
 
     newEra.m_sequence = m_eraList->count() + 1;
     if (direction == '-') {
         newEra.m_direction = -1;
     } else {
         newEra.m_direction = 1;
     }
     newEra.m_offset = offset;
     newEra.m_startDate = startDate;
     newEra.m_startYear = startYear;
     newEra.m_endDate = endDate;
     newEra.m_longName = name;
     newEra.m_shortName = shortName;
     newEra.m_format = format;
 
     m_eraList->append(newEra);
 }
 
 int KCalendarSystemPrivate::shortYearWindowStartYear() const
 {
     return m_shortYearWindowStartYear;
 }
 
 int KCalendarSystemPrivate::applyShortYearWindow(int inputYear) const
 {
     if (inputYear >= 0 && inputYear <= 99) {
         int shortStartYear = m_shortYearWindowStartYear % 100;
         int yearOffset = m_shortYearWindowStartYear - shortStartYear;
         if (inputYear >= shortStartYear) {
             return inputYear + yearOffset;
         } else {
             return inputYear + yearOffset + 100;
         }
     } else {
         return inputYear;
     }
 }
 
 void KCalendarSystemPrivate::loadShortYearWindowStartYear(const KConfigGroup &cg)
 {
     // Default to 2000 for backwards compatibility
     // as that's the old readDate() default value
     int startYear = 2000;
     if (cg.exists()) {
         startYear = cg.readEntry("ShortYearWindowStartYear", 2000);
     }
     m_shortYearWindowStartYear = startYear;
 }
 
 KSharedConfig::Ptr KCalendarSystemPrivate::config()
 {
     if (m_config == KSharedConfig::Ptr()) {
         return KSharedConfig::openConfig();
     } else {
         return m_config;
     }
 }
 
 void KCalendarSystemPrivate::loadConfig(const QString &calendarType)
 {
     KConfigGroup localeGroup(config(), QString::fromLatin1("Locale"));
     KConfigGroup calendarGroup = localeGroup.group(QString::fromLatin1("KCalendarSystem %1").arg(calendarType));
     loadEraList(calendarGroup);
     loadShortYearWindowStartYear(calendarGroup);
 }
 
 KCalendarSystem::KCalendarSystem(KCalendarSystemPrivate &dd, const KSharedConfig::Ptr config, const KLocale *locale)
     : d_ptr(&dd)
 {
     d_ptr->m_config = config;
     d_ptr->m_locale = locale;
 }
 
 KCalendarSystem::~KCalendarSystem()
 {
     delete d_ptr;
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QString KCalendarSystem::calendarLabel() const
 {
     return KCalendarSystem::calendarLabel(calendarSystem());
 }
 
 bool KCalendarSystem::isValid(int year, int month, int day) const
 {
     Q_D(const KCalendarSystem);
 
     return year >= d->earliestValidYear() && year <= d->latestValidYear() && (d->hasYearZero() || year != 0) &&
            month >= 1 && month <= d->monthsInYear(year) &&
            day >= 1 && day <= d->daysInMonth(year, month);
 }
 
 bool KCalendarSystem::isValid(int year, int dayOfYear) const
 {
     Q_D(const KCalendarSystem);
 
     return (isValid(year, 1, 1) && dayOfYear > 0 && dayOfYear <= d->daysInYear(year));
 }
 
 bool KCalendarSystem::isValid(const QString &eraName, int yearInEra, int month, int day) const
 {
     Q_D(const KCalendarSystem);
 
     KCalendarEra era = d->era(eraName, yearInEra);
     return (era.isValid() && isValid(era.year(yearInEra), month, day));
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 bool KCalendarSystem::isValidIsoWeekDate(int year, int isoWeekNumber, int dayOfIsoWeek) const
 {
     Q_D(const KCalendarSystem);
 
     //Tests Year value in standard YMD isValid()
     if (!isValid(year, 1, 1)) {
         return false;
     }
 
     //Test Week Number falls in valid range for this year
     int weeksInThisYear = weeksInYear(year);
     if (isoWeekNumber < 1 || isoWeekNumber  > weeksInThisYear) {
         return false;
     }
 
     //Test Day of Week Number falls in valid range
     if (dayOfIsoWeek < 1 || dayOfIsoWeek > d->daysInWeek()) {
         return false;
     }
 
     //If not in earliest or latest years then all OK
     //Otherwise need to check don't fall into previous or next year that would be invalid
     if (year == d->earliestValidYear() && isoWeekNumber == 1) {
         //If firstDayOfYear falls on or before Thursday then firstDayOfYear falls in week 1 this
         //year and if wanted dayOfIsoWeek falls before firstDayOfYear then falls in previous year
         //and so in invalid year
         int dowFirstDay = dayOfWeek(d->firstDayOfYear(year));
         if (dowFirstDay <= 4 && dayOfIsoWeek < dowFirstDay) {
             return false;
         }
     } else if (year == d->latestValidYear() && isoWeekNumber == weeksInThisYear) {
         //If lastDayOfYear falls on or after Thursday then lastDayOfYear falls in last week this
         //year and if wanted dayOfIsoWeek falls after lastDayOfYear then falls in next year
         //and so in invalid year
         int dowLastDay = dayOfWeek(d->lastDayOfYear(year));
         if (dowLastDay >= 4 && dayOfIsoWeek > dowLastDay) {
             return false;
         }
     }
 
     return true;
 }
 
 bool KCalendarSystem::setDate(QDate &date, int year, int month, int day) const
 {
     date = QDate();
 
     if (isValid(year, month, day)) {
         qint64 jd;
         dateToJulianDay(year, month, day, jd);
         QDate calcDate = QDate::fromJulianDay(jd);
 
         if (isValid(calcDate)) {
             date = calcDate;
             return true;
         }
     }
 
     return false;
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 bool KCalendarSystem::setDate(QDate &date, int year, int dayOfYear) const
 {
     date = QDate();
 
     if (isValid(year, dayOfYear)) {
         qint64 jd;
         dateToJulianDay(year, 1, 1, jd);
         QDate calcDate = QDate::fromJulianDay(jd + dayOfYear - 1);
         if (isValid(calcDate)) {
             date = calcDate;
             return true;
         }
     }
 
     return false;
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 bool KCalendarSystem::setDate(QDate &date, QString eraName, int yearInEra, int month, int day) const
 {
     Q_D(const KCalendarSystem);
 
     KCalendarEra era = d->era(eraName, yearInEra);
     return (era.isValid() && setDate(date, era.year(yearInEra), month, day));
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 bool KCalendarSystem::setDateIsoWeek(QDate &date, int year, int isoWeekNumber, int dayOfIsoWeek) const
 {
     Q_D(const KCalendarSystem);
 
     date = QDate();
 
     if (isValidIsoWeekDate(year, isoWeekNumber, dayOfIsoWeek)) {
 
         QDate calcDate = d->firstDayOfYear(year);
         int dowFirstDayOfYear = dayOfWeek(calcDate);
 
         int daysToAdd = (d->daysInWeek() * (isoWeekNumber - 1)) + dayOfIsoWeek;
 
         if (dowFirstDayOfYear <= 4) {
             calcDate = calcDate.addDays(daysToAdd - dowFirstDayOfYear);
         } else {
             calcDate = calcDate.addDays(daysInWeek(calcDate) + daysToAdd - dowFirstDayOfYear);
         }
 
         if (isValid(calcDate)) {
             date = calcDate;
             return true;
         }
     }
 
     return false;
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 void KCalendarSystem::getDate(const QDate date, int *year, int *month, int *day) const
 {
     int y, m, d;
 
     if (isValid(date)) {
         julianDayToDate(date.toJulianDay(), y, m, d);
     } else {
         y = 0;  // How do you denote invalid year when we support -ve years?
         m = 0;
         d = 0;
     }
 
     if (year) {
         *year = y;
     }
     if (month) {
         *month = m;
     }
     if (day) {
         *day = d;
     }
 
 }
 
 int KCalendarSystem::year(const QDate &date) const
 {
     if (isValid(date)) {
         int year, month, day;
 
         julianDayToDate(date.toJulianDay(), year, month, day);
 
         return year;
     }
 
     return 0;  // How do you denote invalid year when we support -ve years?
 }
 
 int KCalendarSystem::month(const QDate &date) const
 {
     if (isValid(date)) {
         int year, month, day;
 
         julianDayToDate(date.toJulianDay(), year, month, day);
 
         return month;
     }
 
     return 0;
 }
 
 int KCalendarSystem::day(const QDate &date) const
 {
     if (isValid(date)) {
         int year, month, day;
 
         julianDayToDate(date.toJulianDay(), year, month, day);
 
         return day;
     }
 
     return 0;
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QString KCalendarSystem::eraName(const QDate &date, StringFormat format) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         if (format == LongFormat) {
             return d->era(date).name(KLocale::LongName);
         } else {
             return d->era(date).name(KLocale::ShortName);
         }
     }
 
     return QString();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QString KCalendarSystem::eraYear(const QDate &date, StringFormat format) const
 {
     Q_UNUSED(format)
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         return formatDate(date, d->era(date).format());
     }
 
     return QString();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 int KCalendarSystem::yearInEra(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         return d->era(date).yearInEra(year(date));
     }
 
     return -1;
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QList<KCalendarEra> *KCalendarSystem::eraList() const
 {
     Q_D(const KCalendarSystem);
 
     return d->eraList();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 KCalendarEra KCalendarSystem::era(const QDate &eraDate) const
 {
     Q_D(const KCalendarSystem);
 
     return d->era(eraDate);
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 KCalendarEra KCalendarSystem::era(const QString &eraName, int yearInEra) const
 {
     Q_D(const KCalendarSystem);
 
     return d->era(eraName, yearInEra);
 }
 
 QDate KCalendarSystem::addYears(const QDate &date, int numYears) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
 
         int originalYear, originalMonth, originalDay;
         julianDayToDate(date.toJulianDay(), originalYear, originalMonth, originalDay);
 
         int newYear = d->addYears(originalYear, numYears);
         int newMonth = originalMonth;
         int newDay = originalDay;
 
         //Adjust day number if new month has fewer days than old month
         int daysInNewMonth = d->daysInMonth(newYear, newMonth);
         if (daysInNewMonth < originalDay) {
             newDay = daysInNewMonth;
         }
 
         QDate newDate;
         setDate(newDate, newYear, newMonth, newDay);
         return newDate;
 
     }
 
     return QDate();
 }
 
 QDate KCalendarSystem::addMonths(const QDate &date, int numMonths) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
 
         int originalYear, originalMonth, originalDay;
         julianDayToDate(date.toJulianDay(), originalYear, originalMonth, originalDay);
 
         int monthsInOriginalYear = d->monthsInYear(originalYear);
 
         int newYear = d->addYears(originalYear, (originalMonth + numMonths) / monthsInOriginalYear);
         int newMonth = (originalMonth + numMonths) % monthsInOriginalYear;
         int newDay = originalDay;
 
         if (newMonth == 0) {
             newYear = d->addYears(newYear, - 1);
             newMonth = monthsInOriginalYear;
         }
         if (newMonth < 0) {
             newYear = d->addYears(newYear, - 1);
             newMonth = newMonth + monthsInOriginalYear;
         }
 
         //Adjust day number if new month has fewer days than old month
         int daysInNewMonth = d->daysInMonth(newYear, newMonth);
         if (daysInNewMonth < originalDay) {
             newDay = daysInNewMonth;
         }
 
         QDate newDate;
         setDate(newDate, newYear, newMonth, newDay);
         return newDate;
 
     }
 
     return QDate();
 }
 
 // NOT VIRTUAL - Uses shared-d instead
 void KCalendarSystem::dateDifference(const QDate &fromDate, const QDate &toDate,
                                      int *yearsDiff, int *monthsDiff, int *daysDiff, int *direction) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(fromDate) && isValid(toDate)) {
         d->dateDifference(fromDate, toDate, yearsDiff, monthsDiff, daysDiff, direction);
     }
 }
 
 // NOT VIRTUAL - Uses shared-d instead
 int KCalendarSystem::yearsDifference(const QDate &fromDate, const QDate &toDate) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(fromDate) && isValid(toDate)) {
         return d->yearsDifference(fromDate, toDate);
     }
 
     return 0;
 }
 
 // NOT VIRTUAL - Uses shared-d instead
 int KCalendarSystem::monthsDifference(const QDate &fromDate, const QDate &toDate) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(fromDate) && isValid(toDate)) {
         return d->monthsDifference(fromDate, toDate);
     }
 
     return 0;
 }
 
 int KCalendarSystem::monthsInYear(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         return d->monthsInYear(year(date));
     }
 
     return -1;
 }
 
 int KCalendarSystem::monthsInYear(int year) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(year, 1, 1)) {
         return d->monthsInYear(year);
     }
 
     return -1;
 }
 
 int KCalendarSystem::weeksInYear(int year, KLocale::WeekNumberSystem weekNumberSystem) const
 {
     Q_D(const KCalendarSystem);
 
     if (!isValid(year, 1, 1)) {
         return -1;
     }
 
     switch (weekNumberSystem) {
     case KLocale::IsoWeekNumber:
         return d->isoWeeksInYear(year);
     case KLocale::FirstFullWeek:
         return d->regularWeeksInYear(year, locale()->weekStartDay(), 0);
     case KLocale::FirstPartialWeek:
         return d->regularWeeksInYear(year, locale()->weekStartDay(), 1);
     case KLocale::SimpleWeek:
         return d->simpleWeeksInYear(year);
     case KLocale::DefaultWeekNumber:
     default:
         return weeksInYear(year, locale()->weekNumberSystem());
     }
 }
 
 int KCalendarSystem::daysInYear(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         return d->daysInYear(year(date));
     }
 
     return -1;
 }
 
 int KCalendarSystem::daysInYear(int year) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(year, 1, 1)) {
         return d->daysInYear(year);
     }
 
     return -1;
 }
 
 int KCalendarSystem::daysInMonth(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         int year, month, day;
         julianDayToDate(date.toJulianDay(), year, month, day);
         return d->daysInMonth(year, month);
     }
 
     return -1;
 }
 
 int KCalendarSystem::daysInMonth(int year, int month) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(year, month, 1)) {
         return d->daysInMonth(year, month);
     }
 
     return -1;
 }
 
 // If ever changed to depend on the date, a lot of code will break.
 // Don't do that without testing and fixing at least all of KDE SC.
 int KCalendarSystem::daysInWeek(const QDate &date) const
 {
     Q_UNUSED(date)
     Q_D(const KCalendarSystem);
     return d->daysInWeek();
 }
 
 int KCalendarSystem::dayOfYear(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         return d->dayOfYear(date);
     }
 
     return -1;
 }
 
 int KCalendarSystem::dayOfWeek(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         return d->dayOfWeek(date);
     }
 
     return -1;
 }
 
 int KCalendarSystem::week(const QDate &date, KLocale::WeekNumberSystem weekNumberSystem, int *yearNum) const
 {
     Q_D(const KCalendarSystem);
 
     if (!isValid(date)) {
         return -1;
     }
 
     switch (weekNumberSystem) {
     case KLocale::IsoWeekNumber:
         return d->isoWeekNumber(date, yearNum);
     case KLocale::FirstFullWeek:
         return d->regularWeekNumber(date, locale()->weekStartDay(), 0, yearNum);
     case KLocale::FirstPartialWeek:
         return d->regularWeekNumber(date, locale()->weekStartDay(), 1, yearNum);
     case KLocale::SimpleWeek:
         return d->simpleWeekNumber(date, yearNum);
     case KLocale::DefaultWeekNumber:
     default:
         return week(date, locale()->weekNumberSystem(), yearNum);
     }
 }
 
 bool KCalendarSystem::isLeapYear(int year) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(year, 1, 1)) {
         return d->isLeapYear(year);
     }
 
     return false;
 }
 
 bool KCalendarSystem::isLeapYear(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         return d->isLeapYear(year(date));
     }
 
     return false;
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QDate KCalendarSystem::firstDayOfYear(int year) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(year, 1, 1)) {
         return d->firstDayOfYear(year);
     }
 
     return QDate();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QDate KCalendarSystem::lastDayOfYear(int year) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(year, 1, 1)) {
         return d->lastDayOfYear(year);
     }
 
     return QDate();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QDate KCalendarSystem::firstDayOfYear(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         return d->firstDayOfYear(year(date));
     }
 
     return QDate();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QDate KCalendarSystem::lastDayOfYear(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         return d->lastDayOfYear(year(date));
     }
 
     return QDate();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QDate KCalendarSystem::firstDayOfMonth(int year, int month) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(year, month, 1)) {
         return d->firstDayOfMonth(year, month);
     }
 
     return QDate();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QDate KCalendarSystem::lastDayOfMonth(int year, int month) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(year, month, 1)) {
         return d->lastDayOfMonth(year, month);
     }
 
     return QDate();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QDate KCalendarSystem::firstDayOfMonth(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         int year, month;
         getDate(date, &year, &month, nullptr);
         return d->firstDayOfMonth(year, month);
     }
 
     return QDate();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QDate KCalendarSystem::lastDayOfMonth(const QDate &date) const
 {
     Q_D(const KCalendarSystem);
 
     if (isValid(date)) {
         int year, month;
         getDate(date, &year, &month, nullptr);
         return d->lastDayOfMonth(year, month);
     }
 
     return QDate();
 }
 
 QString KCalendarSystem::monthName(int month, int year, KCalendarSystem::MonthNameFormat format) const
 {
     Q_D(const KCalendarSystem);
 
     if (!isValid(year, month, 1)) {
         return QString();
     }
 
     if (format == KCalendarSystem::NarrowName) {
         return d->monthName(month, year, KLocale::NarrowName, false);
     }
 
     if (format == KCalendarSystem::ShortNamePossessive) {
         return d->monthName(month, year, KLocale::ShortName, true);
     }
 
     if (format == KCalendarSystem::ShortName) {
         return d->monthName(month, year, KLocale::ShortName, false);
     }
 
     if (format == KCalendarSystem::LongNamePossessive) {
         return d->monthName(month, year, KLocale::LongName, true);
     }
 
     // KCalendarSystem::LongName or any other
     return d->monthName(month, year, KLocale::LongName, false);
 }
 
 QString KCalendarSystem::monthName(const QDate &date, MonthNameFormat format) const
 {
     if (isValid(date)) {
         int year, month;
         getDate(date, &year, &month, nullptr);
         return monthName(month, year, format);
     }
 
     return QString();
 }
 
 QString KCalendarSystem::weekDayName(int weekDay, KCalendarSystem::WeekDayNameFormat format) const
 {
     Q_D(const KCalendarSystem);
 
     if (weekDay < 1 || weekDay > d->daysInWeek()) {
         return QString();
     }
 
     if (format == KCalendarSystem::NarrowDayName) {
         return d->weekDayName(weekDay, KLocale::NarrowName);
     }
 
     if (format == KCalendarSystem::ShortDayName) {
         return d->weekDayName(weekDay, KLocale::ShortName);
     }
 
     return d->weekDayName(weekDay, KLocale::LongName);
 }
 
 QString KCalendarSystem::weekDayName(const QDate &date, WeekDayNameFormat format) const
 {
     if (isValid(date)) {
         return weekDayName(dayOfWeek(date), format);
     }
 
     return QString();
 }
 
 int KCalendarSystem::yearStringToInteger(const QString &yearString, int &readLength) const
 {
     Q_D(const KCalendarSystem);
 
     QString minus = i18nc("Negative symbol as used for year numbers, e.g. -5 = 5 BC", "-");
     if (yearString.startsWith(minus)) {
         int value = d->integerFromString(yearString.mid(minus.length()), 4, readLength);
         if (readLength > 0 && value >= 0) {
             readLength = readLength + minus.length();
             return value * -1;
         } else {
             return value;
         }
     }
 
     return d->integerFromString(yearString, 4, readLength);
 }
 
 int KCalendarSystem::monthStringToInteger(const QString &monthString, int &readLength) const
 {
     Q_D(const KCalendarSystem);
     return d->integerFromString(monthString, 2, readLength);
 }
 
 int KCalendarSystem::dayStringToInteger(const QString &dayString, int &readLength) const
 {
     Q_D(const KCalendarSystem);
     return d->integerFromString(dayString, 2, readLength);
 }
 
 QString KCalendarSystem::formatDate(const QDate &fromDate, KLocale::DateFormat toFormat) const
 {
     if (!fromDate.isValid()) {
         return QString();
     }
 
     if (toFormat == KLocale::FancyShortDate || toFormat == KLocale::FancyLongDate) {
         QDate now = KDateTime::currentLocalDate();
         int daysToNow = fromDate.daysTo(now);
         switch (daysToNow) {
         case 0:
             return i18n("Today");
         case 1:
             return i18n("Yesterday");
         case 2:
         case 3:
         case 4:
         case 5:
         case 6:
             return weekDayName(fromDate);
         default:
             break;
         }
     }
 
     switch (toFormat) {
     case KLocale::LongDate:
     case KLocale::FancyLongDate:
         return formatDate(fromDate, locale()->dateFormat());
     case KLocale::IsoDate:
         return formatDate(fromDate, QLatin1String("%Y-%m-%d"));
     case KLocale::IsoWeekDate:
         return formatDate(fromDate, QLatin1String("%Y-W%V-%u"));
     case KLocale::IsoOrdinalDate:
         return formatDate(fromDate, QLatin1String("%Y-%j"));
     case KLocale::ShortDate:
     case KLocale::FancyShortDate:
     default:
         return formatDate(fromDate, locale()->dateFormatShort());
     }
 
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QString KCalendarSystem::formatDate(const QDate &fromDate, const QString &toFormat,
                                     KLocale::DateTimeFormatStandard standard) const
 {
     return formatDate(fromDate, toFormat, locale()->dateTimeDigitSet(), standard);
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QString KCalendarSystem::formatDate(const QDate &fromDate, const QString &toFormat, KLocale::DigitSet digitSet,
                                     KLocale::DateTimeFormatStandard formatStandard) const
 {
     if (!isValid(fromDate) || toFormat.isEmpty()) {
         return QString();
     }
 
     KDateTimeFormatter formatter;
     return formatter.formatDate(fromDate, toFormat, this, locale(), digitSet, formatStandard);
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QString KCalendarSystem::formatDate(const QDate &date, KLocale::DateTimeComponent component,
                                     KLocale::DateTimeComponentFormat format,
                                     KLocale::WeekNumberSystem weekNumberSystem) const
 {
     Q_D(const KCalendarSystem);
 
     switch (component) {
     case KLocale::Year:
     case KLocale::YearName:
         switch (format) {
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
             return formatDate(date, QLatin1String("%y"));
         case KLocale::LongNumber:
         case KLocale::LongName:
         case KLocale::DefaultComponentFormat:
         default:
             return formatDate(date, QLatin1String("%Y"));
         }
     case KLocale::Month:
         switch (format) {
         case KLocale::LongName:
             return monthName(date, KCalendarSystem::LongName);
         case KLocale::ShortName:
             return monthName(date, KCalendarSystem::ShortName);
         case KLocale::NarrowName:
             return monthName(date, KCalendarSystem::NarrowName);
         case KLocale::LongNumber:
             return formatDate(date, QLatin1String("%m"));
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return formatDate(date, QLatin1String("%n"));
         }
     case KLocale::MonthName:
         switch (format) {
         case KLocale::NarrowName:
             return monthName(date, KCalendarSystem::NarrowName);
         case KLocale::ShortName:
         case KLocale::ShortNumber:
             return monthName(date, KCalendarSystem::ShortName);
         case KLocale::LongName:
         case KLocale::LongNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return monthName(date, KCalendarSystem::LongName);
         }
     case KLocale::Day:
     case KLocale::DayName:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return formatDate(date, QLatin1String("%d"));
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return formatDate(date, QLatin1String("%e"));
         }
     case KLocale::JulianDay:
         return d->stringFromInteger(date.toJulianDay(), 0);
     case KLocale::EraName:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return eraName(date, KCalendarSystem::LongFormat);
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return eraName(date, KCalendarSystem::ShortFormat);
         }
     case KLocale::EraYear:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return eraYear(date, KCalendarSystem::LongFormat);
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return eraYear(date, KCalendarSystem::ShortFormat);
         }
     case KLocale::YearInEra:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return formatDate(date, QLatin1String("%4Ey"));
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return formatDate(date, QLatin1String("%Ey"));
         }
     case KLocale::DayOfYear:
     case KLocale::DayOfYearName:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return formatDate(date, QLatin1String("%j"));
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return formatDate(date, QLatin1String("%-j"));
         }
     case KLocale::DayOfWeek:
         switch (format) {
         case KLocale::LongName:
             return weekDayName(date, KCalendarSystem::LongDayName);
         case KLocale::ShortName:
             return weekDayName(date, KCalendarSystem::ShortDayName);
         case KLocale::NarrowName:
             return weekDayName(date, KCalendarSystem::NarrowDayName);
         case KLocale::LongNumber:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return formatDate(date, QLatin1String("%-u"));
         }
     case KLocale::DayOfWeekName:
         switch (format) {
         case KLocale::NarrowName:
             return weekDayName(date, KCalendarSystem::NarrowDayName);
         case KLocale::ShortName:
         case KLocale::ShortNumber:
             return weekDayName(date, KCalendarSystem::ShortDayName);
         case KLocale::LongName:
         case KLocale::LongNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return weekDayName(date, KCalendarSystem::LongDayName);
         }
     case KLocale::Week:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return d->stringFromInteger(week(date, weekNumberSystem, nullptr), 2, QLatin1Char('0'));
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return d->stringFromInteger(week(date, weekNumberSystem, nullptr), 0, QLatin1Char('0'));
         }
     case KLocale::WeekYear: {
         int weekYear;
         QDate yearDate;
         week(date, weekNumberSystem, &weekYear);
         setDate(yearDate, weekYear, 1, 1);
         return formatDate(yearDate, KLocale::Year, format);
     }
     case KLocale::MonthsInYear:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return d->stringFromInteger(monthsInYear(date), 2, QLatin1Char('0'));
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return d->stringFromInteger(monthsInYear(date), 0, QLatin1Char('0'));
         }
     case KLocale::WeeksInYear:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return d->stringFromInteger(weeksInYear(date), 2, QLatin1Char('0'));
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return d->stringFromInteger(weeksInYear(date), 0, QLatin1Char('0'));
         }
     case KLocale::DaysInYear:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return d->stringFromInteger(daysInYear(date), 3, QLatin1Char('0'));
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return d->stringFromInteger(daysInYear(date), 0, QLatin1Char('0'));
         }
     case KLocale::DaysInMonth:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
             return d->stringFromInteger(daysInMonth(date), 2, QLatin1Char('0'));
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return d->stringFromInteger(daysInMonth(date), 0, QLatin1Char('0'));
         }
     case KLocale::DaysInWeek:
         switch (format) {
         case KLocale::LongNumber:
         case KLocale::LongName:
         case KLocale::ShortName:
         case KLocale::NarrowName:
         case KLocale::ShortNumber:
         case KLocale::DefaultComponentFormat:
         default:
             return d->stringFromInteger(d->daysInWeek(), 0);
         }
     default:
         return QString();
     }
 }
 
 QDate KCalendarSystem::readDate(const QString &str, bool *ok) const
 {
     //Try each standard format in turn, start with the locale ones,
     //then the well defined standards
     QDate date = readDate(str, KLocale::ShortFormat, ok);
     if (!isValid(date)) {
         date = readDate(str, KLocale::NormalFormat, ok);
         if (!isValid(date)) {
             date = readDate(str, KLocale::IsoFormat, ok);
             if (!isValid(date)) {
                 date = readDate(str, KLocale::IsoWeekFormat, ok);
                 if (!isValid(date)) {
                     date = readDate(str, KLocale::IsoOrdinalFormat, ok);
                 }
             }
         }
     }
 
     return date;
 }
 
 QDate KCalendarSystem::readDate(const QString &str, KLocale::ReadDateFlags flags, bool *ok) const
 {
     if (flags & KLocale::ShortFormat) {
         return readDate(str, locale()->dateFormatShort(), ok);
     } else if (flags & KLocale::NormalFormat) {
         return readDate(str, locale()->dateFormat(), ok);
     } else if (flags & KLocale::IsoFormat) {
         return readDate(str, QLatin1String("%Y-%m-%d"), ok);
     } else if (flags & KLocale::IsoWeekFormat) {
         return readDate(str, QLatin1String("%Y-W%V-%u"), ok);
     } else if (flags & KLocale::IsoOrdinalFormat) {
         return readDate(str, QLatin1String("%Y-%j"), ok);
     }
     return QDate();
 }
 
 QDate KCalendarSystem::readDate(const QString &inputString, const QString &formatString, bool *ok) const
 {
     return readDate(inputString, formatString, ok, KLocale::KdeFormat);
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 QDate KCalendarSystem::readDate(const QString &inputString, const QString &formatString, bool *ok,
                                 KLocale::DateTimeFormatStandard formatStandard) const
 {
     KDateTimeParser parser;
     QDate resultDate = parser.parseDate(inputString, formatString, this, locale(), locale()->dateTimeDigitSet(), formatStandard);
     if (ok) {
         *ok = resultDate.isValid();
     }
     return resultDate;
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 int KCalendarSystem::shortYearWindowStartYear() const
 {
     Q_D(const KCalendarSystem);
 
     return d->shortYearWindowStartYear();
 }
 
 // NOT VIRTUAL - If override needed use shared-d
 int KCalendarSystem::applyShortYearWindow(int inputYear) const
 {
     Q_D(const KCalendarSystem);
 
     return d->applyShortYearWindow(inputYear);
 }
 
 const KLocale *KCalendarSystem::locale() const
 {
     Q_D(const KCalendarSystem);
 
     return d->locale();
 }