698 lines
26 KiB
C++
698 lines
26 KiB
C++
/*
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Copyright (C) 2012 Giorgos Tsiapaliwkas <terietor@gmail.com>
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Copyright (C) 2012 Antonis Tsiapaliokas <kok3rs@gmail.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef CALENDARSYSTEM_H
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#define CALENDARSYSTEM_H
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//own
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#include "locale_p.h" // needed for enums
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//Qt
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#include <QtCore/QDate>
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class KCalendarSystem;
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class CalendarSystem : public QObject
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{
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Q_OBJECT
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//enums
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Q_ENUMS(StringFormat)
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Q_ENUMS(MonthNameFormat)
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Q_ENUMS(WeekDayNameFormat)
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Q_ENUMS(WeekNumberSystem)
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Q_ENUMS(ReadDateFlags)
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Q_ENUMS(DateTimeComponent)
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Q_ENUMS(DateTimeComponentFormat)
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//properties
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Q_PROPERTY(QList<int> calendarSystemsList READ calendarSystemsList CONSTANT) //read-only
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Q_PROPERTY(Locale::CalendarSystem calendarSystem READ calendarSystem CONSTANT)//read-only
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Q_PROPERTY(QString calendarLabel READ calendarLabel CONSTANT)//read-only
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Q_PROPERTY(QDate epoch READ epoch CONSTANT)//read-only
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Q_PROPERTY(QDate earliestValidDate READ earliestValidDate CONSTANT)//read-only
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Q_PROPERTY(QDate latestValidDate READ latestValidDate CONSTANT)//read-only
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Q_PROPERTY(int shortYearWindowStartYear READ shortYearWindowStartYear CONSTANT)
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Q_PROPERTY(int weekStartDay READ weekStartDay CONSTANT)//read-only
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Q_PROPERTY(bool isLunar READ isLunar CONSTANT)//read-only
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Q_PROPERTY(bool isLunisolar READ isLunisolar CONSTANT)//read-only
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Q_PROPERTY(bool isSolar READ isSolar CONSTANT)//read-only
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Q_PROPERTY(bool isProleptic READ isProleptic CONSTANT)//read-only
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public:
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//ctor
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CalendarSystem(QObject *parent = 0);
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//the above are enums which I borrow from the Locale class
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/**
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*
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* System used for Week Numbers
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*/
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enum WeekNumberSystem {
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DefaultWeekNumber = 1000, /**< The system locale default */
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IsoWeekNumber = 0, /**< ISO Week Number */
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FirstFullWeek = 1, /**< Week 1 starts on the first Week Start Day in year ends after 7 days */
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FirstPartialWeek = 2, /**< Week 1 starts Jan 1st ends day before first Week Start Day in year */
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SimpleWeek = 3 /**< Week 1 starts Jan 1st ends after 7 days */
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};
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enum ReadDateFlags {
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NormalFormat = 1, /**< Only accept a date string in
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the locale LongDate format */
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shortFormat = 2, /**< Only accept a date string in
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the locale ShortDate format */
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IsoFormat = 4, /**< Only accept a date string in
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ISO date format (YYYY-MM-DD) */
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IsoWeekFormat = 8, /**< Only accept a date string in
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ISO Week date format (YYYY-Www-D) */
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IsoOrdinalFormat = 16 /**< Only accept a date string in
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ISO Week date format (YYYY-DDD) */
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};
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/**
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* The various Components that make up a Date / Time
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* In the future the Components may be combined as flags for dynamic
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* generation of Date Formats.
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*/
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enum DateTimeComponent {
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Year = 0x1, /**< The Year portion of a date, may be number or name */
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YearName = 0x2, /**< The Year Name portion of a date */
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Month = 0x4, /**< The Month portion of a date, may be number or name */
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MonthName = 0x8, /**< The Month Name portion of a date */
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Day = 0x10, /**< The Day portion of a date, may be number or name */
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DayName = 0x20, /**< The Day Name portion of a date */
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JulianDay = 0x40, /**< The Julian Day of a date */
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EraName = 0x80, /**< The Era Name portion of a date */
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EraYear = 0x100, /**< The Era and Year portion of a date */
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YearInEra = 0x200, /**< The Year In Era portion of a date */
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DayOfYear = 0x400, /**< The Day Of Year portion of a date, may be number or name */
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DayOfYearName = 0x800, /**< The Day Of Year Name portion of a date */
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DayOfWeek = 0x1000, /**< The Day Of Week / Weekday portion of a date, may be number or name */
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DayOfWeekName = 0x2000, /**< The Day Of Week Name / Weekday Name portion of a date */
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Week = 0x4000, /**< The Week Number portion of a date */
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WeekYear = 0x8000, /**< The Week Year portion of a date */
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MonthsInYear = 0x10000, /**< The Months In Year portion of a date */
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WeeksInYear = 0x20000, /**< The Weeks In Year portion of a date */
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DaysInYear = 0x40000, /**< The Days In Year portion of a date */
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DaysInMonth = 0x80000, /**< The Days In Month portion of a date */
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DaysInWeek = 0x100000, /**< The Days In Week portion of a date */
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Hour = 0x200000, /**< The Hours portion of a date */
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Minute = 0x400000, /**< The Minutes portion of a date */
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Second = 0x800000, /**< The Seconds portion of a date */
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Millisecond = 0x1000000, /**< The Milliseconds portion of a date */
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DayPeriod = 0x2000000, /**< The Day Period portion of a date, e.g. AM/PM */
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DayPeriodHour = 0x4000000, /**< The Day Period Hour portion of a date */
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Timezone = 0x8000000, /**< The Time Zone portion of a date, may be offset or name */
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TimezoneName = 0x10000000, /**< The Time Zone Name portion of a date */
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UnixTime = 0x20000000 /**< The UNIX Time portion of a date */
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};
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enum DateTimeComponentFormat {
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DefaultComponentFormat = 1000, /**< The system locale default for the componant */
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ShortNumber = 0, /**< Number at its natural width, e.g. 2 for the 2nd*/
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LongNumber, /**< Number padded to a required width, e.g. 02 for the 2nd*/
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narrowName = 3, /**< Narrow text format, may not be unique, e.g. M for Monday */
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shortName, /**< Short text format, e.g. Mon for Monday */
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longName /**< Long text format, e.g. Monday for Monday */
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};
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//end of the borrowing enums
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/**
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* Format for returned year number / month number / day number as string.
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*/
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enum StringFormat {
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ShortFormat, /**< Short string format, e.g. 2000 = "00" or 6 = "6" */
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LongFormat /**< Long string format, e.g. 2000 = "2000" or 6 = "06" */
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};
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/**
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* Format for returned month / day name.
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*/
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enum MonthNameFormat {
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ShortName, /**< Short name format, e.g. "Dec" */
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LongName, /**< Long name format, e.g. "December" */
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ShortNamePossessive, /**< Short name possessive format, e.g. "of Dec" */
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LongNamePossessive, /**< Long name possessive format, e.g. "of December" */
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NarrowName /**< Narrow name format, e.g. "D" */
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};
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/**
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* Format for returned month / day name.
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*/
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enum WeekDayNameFormat {
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ShortDayName, /**< Short name format, e.g. "Fri" */
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LongDayName, /**< Long name format, e.g. "Friday" */
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NarrowDayName /**< Narrow name format, e.g. "F" */
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};
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/**
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* Returns the list of currently supported Calendar Systems
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* @return list of Calendar Systems
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*/
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QList<int> calendarSystemsList();
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/**
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*
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* Returns the Calendar System type of the CalendarSystem object
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*
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* @return type of calendar system
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*/
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Locale::CalendarSystem calendarSystem() const;
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/**
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*
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* Returns a localized label to display for the current Calendar System type.
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*
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* @return localized label for this Calendar System
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*/
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QString calendarLabel() const; //TODO, it returns undefined
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/**
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* Returns a QDate holding the epoch of the calendar system. Usually YMD
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* of 1/1/1, access the returned QDates method toJulianDay() if you
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* require the actual Julian day number. Note: a particular calendar
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* system implementation may not include the epoch in its supported range,
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* or the calendar system may be proleptic in which case it supports dates
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* before the epoch.
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*
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* @see CalendarSystem::earliestValidDate
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* @see CalendarSystem::latestValidDate
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* @see CalendarSystem::isProleptic
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* @see CalendarSystem::isValid
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*
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* @return epoch of calendar system
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*/
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QDate epoch() const;
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/**
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* Returns the earliest date valid in this calendar system implementation.
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*
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* If the calendar system is proleptic then this may be before epoch.
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*
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* @see CalendarSystem::epoch
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* @see CalendarSystem::latestValidDate
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*
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* @return date the earliest valid date
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*/
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QDate earliestValidDate() const;
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/**
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* Returns the latest date valid in this calendar system implementation.
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*
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* @see CalendarSystem::epoch
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* @see CalendarSystem::earliestValidDate
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*
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* @return date the latest valid date
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*/
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QDate latestValidDate() const;
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/**
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*
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* Returns whether a given date is valid in this calendar system.
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*
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* @param year the year portion of the date to check
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* @param isoWeekNumber the ISO week portion of the date to check
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* @param dayOfIsoWeek the day of week portion of the date to check
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* @return @c true if the date is valid, @c false otherwise
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*/
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Q_INVOKABLE bool isValidIsoWeekDate(int year, int isoWeekNumber, int dayOfIsoWeek) const;
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/**
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* Returns whether a given date is valid in this calendar system.
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*
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* @param date the date to check
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* @return @c true if the date is valid, @c false otherwise
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*/
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Q_INVOKABLE bool isValid(const QDate &date) const;
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/**
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*
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* Returns the year, month and day portion of a given date in the current calendar system
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* The values are returned in a hash, the available keys are,
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* ["year"] the year of the date
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* ["month"] the month of the date
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* ["day"] the day of the date
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* @param date date to get year, month and day for
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*/
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Q_INVOKABLE QVariantHash getDate(const QDate date) const;
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/**
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* Returns the year portion of a given date in the current calendar system
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*
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* @param date date to return year for
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* @return year, 0 if input date is invalid
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*/
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Q_INVOKABLE int year(const QDate &date) const;
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/**
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* Returns the month portion of a given date in the current calendar system
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*
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* @param date date to return month for
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* @return month of year, 0 if input date is invalid
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*/
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Q_INVOKABLE int month(const QDate &date) const;
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/**
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* Returns the day portion of a given date in the current calendar system
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*
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* @param date date to return day for
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* @return day of the month, 0 if input date is invalid
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*/
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Q_INVOKABLE int day(const QDate &date) const;
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/**
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*
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* Returns the Era Name portion of a given date in the current calendar system,
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* for example "AD" or "Anno Domini" for the Gregorian calendar and Christian Era.
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*
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* @param date date to return Era Name for
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* @param format format to return, either short or long
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* @return era name, empty string if input date is invalid
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*/
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Q_INVOKABLE QString eraName(const QDate &date, StringFormat format = ShortFormat) const;
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/**
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*
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* Returns the Era Year portion of a given date in the current
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* calendar system, for example "2000 AD" or "Heisei 22".
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*
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* @param date date to return Era Year for
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* @param format format to return, either short or long
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* @return era name, empty string if input date is invalid
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*/
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Q_INVOKABLE QString eraYear(const QDate &date, StringFormat format = ShortFormat) const;
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/**
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*
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* Returns the Year In Era portion of a given date in the current calendar
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* system, for example 1 for "1 BC".
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*
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* @param date date to return Year In Era for
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* @return Year In Era, -1 if input date is invalid
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*/
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Q_INVOKABLE int yearInEra(const QDate &date) const;
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/**
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* Returns a QDate containing a date @p nyears years later.
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*
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* @param date The old date
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* @param nyears The number of years to add
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* @return The new date, null date if any errors
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*/
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Q_INVOKABLE QDate addYears(const QDate &date, int nyears) const;
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/**
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* Returns a QDate containing a date @p nmonths months later.
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*
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* @param date The old date
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* @param nmonths number of months to add
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* @return The new date, null date if any errors
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*/
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Q_INVOKABLE QDate addMonths(const QDate &date, int nmonths) const;
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/**
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* Returns a QDate containing a date @p ndays days later.
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*
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* @param date The old date
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* @param ndays number of days to add
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* @return The new date, null date if any errors
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*/
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Q_INVOKABLE QDate addDays(const QDate &date, int ndays) const;
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/**
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* Returns the difference between two dates with a hash, the available keys are
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* ["years"] Returns number of years difference
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* ["months"] Returns number of months difference
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* ["days"] Returns number of days difference
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* ["direction"] Returns direction of difference, 1 if fromDate <= toDate, -1 otherwise
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* The difference is always caculated from the earlier date to the later
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* date in year, month and day order, with the @p direction parameter
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* indicating which direction the difference is applied from the @p toDate.
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*
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* For example, the difference between 2010-06-10 and 2012-09-5 is 2 years,
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* 2 months and 26 days. Note that the difference between two last days of
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* the month is always 1 month, e.g. 2010-01-31 to 2010-02-28 is 1 month
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* not 28 days.
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*
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* @param fromDate The date to start from
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* @param toDate The date to end at
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*/
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Q_INVOKABLE QVariantHash dateDifference(const QDate &fromDate, const QDate &toDate)const;
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/**
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* Returns the difference between two dates in completed calendar years.
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* The returned value will be negative if @p fromDate > @p toDate.
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*
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* For example, the difference between 2010-06-10 and 2012-09-5 is 2 years.
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*
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* @param fromDate The date to start from
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* @param toDate The date to end at
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* @return The number of years difference
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*/
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Q_INVOKABLE int yearsDifference(const QDate &fromDate, const QDate &toDate) const;
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/**
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* Returns the difference between two dates in completed calendar months
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* The returned value will be negative if @p fromDate > @p toDate.
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*
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* For example, the difference between 2010-06-10 and 2012-09-5 is 26 months.
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* Note that the difference between two last days of the month is always 1
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* month, e.g. 2010-01-31 to 2010-02-28 is 1 month not 28 days.
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*
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* @param fromDate The date to start from
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* @param toDate The date to end at
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* @return The number of months difference
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*/
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Q_INVOKABLE int monthsDifference(const QDate &fromDate, const QDate &toDate) const;
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/**
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* Returns the difference between two dates in days
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* The returned value will be negative if @p fromDate > @p toDate.
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*
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* @param fromDate The date to start from
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* @param toDate The date to end at
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* @return The number of days difference
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*/
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Q_INVOKABLE int daysDifference(const QDate &fromDate, const QDate &toDate) const;
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/**
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*
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* Returns number of months in the given year
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*
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* @param year the required year
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* @return number of months in the year, -1 if input date invalid
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*/
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Q_INVOKABLE int monthsInYear(int year) const;
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/**
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*
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* Returns the number of Weeks in a year using the required Week Number System.
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*
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* Unless you specifically want a particular Week Number System (e.g. ISO Weeks)
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* you should use the localized number of weeks provided by weeksInYear().
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*
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* @see week()
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* @see formatDate()
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* @param year the year
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* @param weekNumberSystem the week number system to use
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* @return number of weeks in the year, -1 if date invalid
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*/
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Q_INVOKABLE int weeksInYear(int year, WeekNumberSystem weekNumberSystem) const;
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/**
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*
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* Returns the number of days in the given year.
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*
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* @param year the year
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* @return number of days in year, -1 if input date invalid
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*/
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Q_INVOKABLE int daysInYear(int year) const;
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/**
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*
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* Returns the number of days in the given month.
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*
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* @param year the year the month is in
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* @param month the month
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* @return number of days in month, -1 if input date invalid
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*/
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Q_INVOKABLE int daysInMonth(int year, int month) const;
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/**
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* Returns the number of days in the given week.
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*
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* @param date the date to obtain week from
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* @return number of days in week, -1 if input date invalid
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*/
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Q_INVOKABLE int daysInWeek(const QDate &date) const;
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/**
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* Returns the day number of year for the given date
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*
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* The days are numbered 1..daysInYear()
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*
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* @param date the date to obtain day from
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* @return day of year number, -1 if input date not valid
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*/
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Q_INVOKABLE int dayOfYear(const QDate &date) const;
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/**
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* Returns the weekday number for the given date
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*
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* The weekdays are numbered 1..7 for Monday..Sunday.
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*
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* This value is @em not affected by the value of weekStartDay()
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*
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* @param date the date to obtain day from
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* @return day of week number, -1 if input date not valid
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*/
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Q_INVOKABLE int dayOfWeek(const QDate &date) const;
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/**
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* Returns the Week Number for the date in the required Week Number System.
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*
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* Unless you want a specific Week Number System (e.g. ISO Week), you should
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* use the localized Week Number form of week().
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*
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* If the date falls in the last week of the previous year or the first
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* week of the following year, then the yearNum returned will be set to the
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* appropriate year.
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*
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* Technically, the ISO Week Number only applies to the ISO/Gregorian Calendar
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* System, but the same rules will be applied to the current Calendar System.
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*
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* @see weeksInYear()
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* @see formatDate()
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* @param date the date to obtain week from
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* @param weekNumberSystem the Week Number System to use
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* @param yearNum returns the year the date belongs to
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* @return week number, -1 if input date invalid
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*/
|
|
Q_INVOKABLE int week(const QDate &date, WeekNumberSystem weekNumberSystem) const;
|
|
|
|
/**
|
|
* Returns whether a given year is a leap year.
|
|
*
|
|
* Input year must be checked for validity in current Calendar System prior to calling, no
|
|
* validity checking performed in this routine, behaviour is undefined in invalid case.
|
|
*
|
|
* @param year the year to check
|
|
* @return @c true if the year is a leap year, @c false otherwise
|
|
*/
|
|
Q_INVOKABLE bool isLeapYear(int year) const;
|
|
|
|
/**
|
|
*
|
|
* Returns a QDate containing the first day of the year
|
|
*
|
|
* @param year The year to return the date for
|
|
* @return The first day of the year
|
|
*/
|
|
Q_INVOKABLE QDate firstDayOfYear(int year) const;
|
|
|
|
/**
|
|
*
|
|
* Returns a QDate containing the last day of the year
|
|
*
|
|
* @param year The year to return the date for
|
|
* @return The last day of the year
|
|
*/
|
|
Q_INVOKABLE QDate lastDayOfYear(int year) const;
|
|
|
|
/**
|
|
*
|
|
* Returns a QDate containing the first day of the month
|
|
*
|
|
* @param year The year to return the date for
|
|
* @param month The month to return the date for
|
|
* @return The first day of the month
|
|
*/
|
|
Q_INVOKABLE QDate firstDayOfMonth(int year, int month) const;
|
|
|
|
/**
|
|
*
|
|
* Returns a QDate containing the last day of the month
|
|
*
|
|
* @param year The year to return the date for
|
|
* @param month The month to return the date for
|
|
* @return The last day of the month
|
|
*/
|
|
Q_INVOKABLE QDate lastDayOfMonth(int year, int month) const;
|
|
|
|
/**
|
|
* Gets specific calendar type month name for a given month number
|
|
* If an invalid month is specified, QString() is returned.
|
|
*
|
|
* @param month the month number
|
|
* @param year the year the month belongs to
|
|
* @param format specifies whether the short month name or long month name should be used
|
|
* @return name of the month, empty string if any error
|
|
*/
|
|
Q_INVOKABLE QString monthName(int month, int year, MonthNameFormat format = LongName) const;
|
|
|
|
/**
|
|
* Gets specific calendar type week day name.
|
|
* If an invalid week day is specified, QString() is returned.
|
|
*
|
|
* @param weekDay number of day in week (Monday = 1, ..., Sunday = 7)
|
|
* @param format specifies whether the short month name or long month name should be used
|
|
* @return day name, empty string if any error
|
|
*/
|
|
Q_INVOKABLE QString weekDayName(int weekDay, WeekDayNameFormat format = LongDayName) const;
|
|
|
|
/**
|
|
*
|
|
* Returns a Date Component as a localized string in the requested format.
|
|
*
|
|
* For example for 2010-01-01 the Locale::Month with en_US Locale and Gregorian calendar may return:
|
|
* CalendarSystem::ShortNumber = "1"
|
|
* CalendarSystem::LongNumber = "01"
|
|
* CalendarSystem::NarrowName = "J"
|
|
* CalendarSystem::ShortName = "Jan"
|
|
* CalendarSystem::LongName = "January"
|
|
*
|
|
* @param date The date to format
|
|
* @param component The date component to return
|
|
* @param format The format to return the @p component in
|
|
* @param weekNumberSystem To override the default Week Number System to use
|
|
* @return The localized string form of the date component
|
|
*/
|
|
Q_INVOKABLE QString formatDate(const QDate &date, DateTimeComponent component,
|
|
DateTimeComponentFormat format, WeekNumberSystem weekNumberSystem) const;
|
|
|
|
/**
|
|
* Converts a localized date string to a QDate.
|
|
* This method is stricter than readDate(str,&ok): it will either accept
|
|
* a date in full format or a date in short format, depending on @p flags.
|
|
*
|
|
* Uses the calendar system's internal locale set when the instance was
|
|
* created, which ensures that the correct calendar system and locale
|
|
* settings are respected, which would not occur in some cases if using
|
|
* the global locale. Defaults to global locale.
|
|
*
|
|
* @see Locale::readDate
|
|
*
|
|
* @param str the string to convert
|
|
* @param flags whether the date string is to be in full format or in short format
|
|
* @param ok if non-null, will be set to @c true if the date is valid, @c false if invalid
|
|
*
|
|
* @return the string converted to a QDate
|
|
*/
|
|
Q_INVOKABLE QDate readDate(const QString &str, ReadDateFlags flags) const;
|
|
|
|
/**
|
|
*
|
|
* Returns the Short Year Window Start Year for the current Calendar System.
|
|
*
|
|
* Use this function to get the Start Year for the Short Year Window to be
|
|
* applied when 2 digit years are entered for a Short Year input format,
|
|
* e.g. if the Short Year Window Start Year is 1930, then the input Short
|
|
* Year value of 40 is interpreted as 1940 and the input Short Year value
|
|
* of 10 is interpreted as 2010.
|
|
*
|
|
* The Short Year Window is only ever applied when reading the Short Year
|
|
* format and not the Long Year format, i.e. Locale::ShortFormat or '%y'
|
|
* only and not Locale::LongFormat or '%Y'.
|
|
*
|
|
* The Start Year 0 effectively means not to use a Short Year Window
|
|
*
|
|
* Each Calendar System requires a different Short Year Window as they have
|
|
* different epochs. The Gregorian Short Year Window usually pivots around
|
|
* the year 2000, whereas the Hebrew Short Year Window usually pivots around
|
|
* the year 5000.
|
|
*
|
|
* This value must always be used when evaluating user input Short Year
|
|
* strings.
|
|
*
|
|
* @see Locale::shortYearWindowStartYear
|
|
* @see Locale::applyShortYearWindow
|
|
* @return the short year window start year
|
|
*/
|
|
int shortYearWindowStartYear() const;
|
|
|
|
/**
|
|
*
|
|
* Returns the Year Number after applying the Year Window.
|
|
*
|
|
* If the @p inputYear is between 0 and 99, then apply the Year Window and
|
|
* return the calculated Year Number.
|
|
*
|
|
* If the @p inputYear is not between 0 and 99, then the original Year Number
|
|
* is returned.
|
|
*
|
|
* @see Locale::setYearWindowOffset
|
|
* @see Locale::yearWindowOffset
|
|
* @param inputYear the year number to apply the year window to
|
|
* @return the year number after applying the year window
|
|
*/
|
|
Q_INVOKABLE int applyShortYearWindow(int inputYear) const;
|
|
|
|
/**
|
|
* Use this to determine which day is the first day of the week.
|
|
*
|
|
* Uses the calendar system's internal locale set when the instance was
|
|
* created, which ensures that the correct calendar system and locale
|
|
* settings are respected, which would not occur in some cases if using
|
|
* the global locale. Defaults to global locale.
|
|
*
|
|
* @see Locale::weekStartDay
|
|
*
|
|
* @return an integer (Monday = 1, ..., Sunday = 7)
|
|
*/
|
|
int weekStartDay() const;
|
|
|
|
/**
|
|
* Returns whether the calendar is lunar based.
|
|
*
|
|
* @return @c true if the calendar is lunar based, @c false if not
|
|
*/
|
|
bool isLunar() const;
|
|
|
|
/**
|
|
* Returns whether the calendar is lunisolar based.
|
|
*
|
|
* @return @c true if the calendar is lunisolar based, @c false if not
|
|
*/
|
|
bool isLunisolar() const;
|
|
|
|
/**
|
|
* Returns whether the calendar is solar based.
|
|
*
|
|
* @return @c true if the calendar is solar based, @c false if not
|
|
*/
|
|
bool isSolar() const;
|
|
|
|
/**
|
|
* Returns whether the calendar system is proleptic, i.e. whether dates
|
|
* before the epoch are supported.
|
|
*
|
|
* @see CalendarSystem::epoch
|
|
*
|
|
* @return @c true if the calendar system is proleptic, @c false if not
|
|
*/
|
|
bool isProleptic() const;
|
|
|
|
private:
|
|
KCalendarSystem *m_calendarSystem;
|
|
};
|
|
|
|
#endif
|