X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/cd0b170911637899ac3c126367ee5821f357c185..2d08140fdbb3aaab9457287b49e877ecf3b8b790:/include/wx/datetime.h diff --git a/include/wx/datetime.h b/include/wx/datetime.h index bbd8d833f6..1d7a329e67 100644 --- a/include/wx/datetime.h +++ b/include/wx/datetime.h @@ -38,9 +38,10 @@ class WXDLLEXPORT wxDateSpan; * TODO Well, everything :-) * * + 1. Time zones with minutes (make TimeZone a class) - * 2. getdate() function like under Solaris + * ? 2. getdate() function like under Solaris * + 3. text conversion for wxDateSpan - * 4. pluggable modules for the workdays calculations + * + 4. pluggable modules for the workdays calculations + * 5. wxDateTimeHolidayAuthority for Easter and other christian feasts */ /* @@ -91,6 +92,15 @@ class WXDLLEXPORT wxDateSpan; the copy of the object with the changed sign. */ +// an invalid/default date time object which may be used as the default +// argument for arguments of type wxDateTime; it is also returned by all +// functions returning wxDateTime on failure (this is why it is also called +// wxInvalidDateTime) +class WXDLLEXPORT wxDateTime; + +WXDLLEXPORT_DATA(extern wxDateTime&) wxDefaultDateTime; +#define wxInvalidDateTime wxDefaultDateTime + // ---------------------------------------------------------------------------- // wxDateTime represents an absolute moment in the time // ---------------------------------------------------------------------------- @@ -108,6 +118,9 @@ public: // data in this format typedef unsigned short wxDateTime_t; + // constants + // ------------------------------------------------------------------------ + // the timezones enum TZ { @@ -344,12 +357,27 @@ public: Inv_Year = SHRT_MIN // should hold in wxDateTime_t }; + // flags for GetWeekDayName and GetMonthName + enum NameFlags + { + Name_Full = 0x01, // return full name + Name_Abbr = 0x02 // return abbreviated name + }; + + // flags for GetWeekOfYear and GetWeekOfMonth + enum WeekFlags + { + Default_First, // Sunday_First for US, Monday_First for the rest + Monday_First, // week starts with a Monday + Sunday_First // week starts with a Sunday + }; + // helper classes // ------------------------------------------------------------------------ // a class representing a time zone: basicly, this is just an offset // (in seconds) from GMT - class TimeZone + class WXDLLEXPORT TimeZone { public: TimeZone(TZ tz); @@ -369,7 +397,7 @@ public: // NB: this struct should always be kept normalized (i.e. mon should // be < 12, 1 <= day <= 31 &c), so use AddMonths(), AddDays() // instead of modifying the member fields directly! - struct Tm + struct WXDLLEXPORT Tm { wxDateTime_t msec, sec, min, hour, mday; Month mon; @@ -453,11 +481,16 @@ public: // get the full (default) or abbreviated month name in the current // locale, returns empty string on error - static wxString GetMonthName(Month month, bool abbr = FALSE); + static wxString GetMonthName(Month month, + NameFlags flags = Name_Full); // get the full (default) or abbreviated weekday name in the current // locale, returns empty string on error - static wxString GetWeekDayName(WeekDay weekday, bool abbr = FALSE); + static wxString GetWeekDayName(WeekDay weekday, + NameFlags flags = Name_Full); + + // get the AM and PM strings in the current locale (may be empty) + static void GetAmPmStrings(wxString *am, wxString *pm); // return TRUE if the given country uses DST for this year static bool IsDSTApplicable(int year = Inv_Year, @@ -490,7 +523,10 @@ public: wxDateTime() { } // from time_t: seconds since the Epoch 00:00:00 UTC, Jan 1, 1970) +#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400)) +// VA C++ confuses this with wxDateTime(double jdn) thinking it is a duplicate declaration inline wxDateTime(time_t timet); +#endif // from broken down time/date (only for standard Unix range) inline wxDateTime(const struct tm& tm); // from broken down time/date (any range) @@ -525,8 +561,11 @@ public: // set to the current time inline wxDateTime& SetToCurrent(); +#if (!(defined(__VISAGECPP__) && __IBMCPP__ >= 400)) +// VA C++ confuses this with wxDateTime(double jdn) thinking it is a duplicate declaration // set to given time_t value inline wxDateTime& Set(time_t timet); +#endif // set to given broken down time/date wxDateTime& Set(const struct tm& tm); @@ -586,17 +625,21 @@ public: // default assignment operator is ok // calendar calculations (functions which set the date only leave the time - // unchanged, e.g. don't explictly zero it) + // unchanged, e.g. don't explictly zero it): SetXXX() functions modify the + // object itself, GetXXX() ones return a new object. // ------------------------------------------------------------------------ // set to the given week day in the same week as this one wxDateTime& SetToWeekDayInSameWeek(WeekDay weekday); + inline wxDateTime GetWeekDayInSameWeek(WeekDay weekday) const; // set to the next week day following this one wxDateTime& SetToNextWeekDay(WeekDay weekday); + inline wxDateTime GetNextWeekDay(WeekDay weekday) const; - // set to the previous week day following this one + // set to the previous week day before this one wxDateTime& SetToPrevWeekDay(WeekDay weekday); + inline wxDateTime GetPrevWeekDay(WeekDay weekday) const; // set to Nth occurence of given weekday in the given month of the // given year (time is set to 0), return TRUE on success and FALSE on @@ -606,21 +649,35 @@ public: int n = 1, Month month = Inv_Month, int year = Inv_Year); + inline wxDateTime GetWeekDay(WeekDay weekday, + int n = 1, + Month month = Inv_Month, + int year = Inv_Year) const; // sets to the last weekday in the given month, year inline bool SetToLastWeekDay(WeekDay weekday, Month month = Inv_Month, int year = Inv_Year); + inline wxDateTime GetLastWeekDay(WeekDay weekday, + Month month = Inv_Month, + int year = Inv_Year); // sets the date to the given day of the given week in the year, // returns TRUE on success and FALSE if given date doesn't exist (e.g. // numWeek is > 53) bool SetToTheWeek(wxDateTime_t numWeek, WeekDay weekday = Mon); + inline wxDateTime GetWeek(wxDateTime_t numWeek, WeekDay weekday = Mon) const; // sets the date to the last day of the given (or current) month or the // given (or current) year wxDateTime& SetToLastMonthDay(Month month = Inv_Month, int year = Inv_Year); + inline wxDateTime GetLastMonthDay(Month month = Inv_Month, + int year = Inv_Year) const; + + // sets to the given year day (1..365 or 366) + wxDateTime& SetToYearDay(wxDateTime_t yday); + inline wxDateTime GetYearDay(wxDateTime_t yday) const; // The definitions below were taken verbatim from // @@ -667,16 +724,21 @@ public: // time. Using the functions below, it may be converted to another time // zone (for example, the Unix epoch is wxDateTime(1, Jan, 1970).ToGMT()) // + // these functions try to handle DST internally, but there is no magical + // way to know all rules for it in all countries in the world, so if the + // program can handle it itself (or doesn't want to handle it at all for + // whatever reason), the DST handling can be disabled with noDST. + // // Converting to the local time zone doesn't do anything. // ------------------------------------------------------------------------ // transform to any given timezone - inline wxDateTime ToTimezone(const TimeZone& tz) const; - wxDateTime& MakeTimezone(const TimeZone& tz); + inline wxDateTime ToTimezone(const TimeZone& tz, bool noDST = FALSE) const; + wxDateTime& MakeTimezone(const TimeZone& tz, bool noDST = FALSE); // transform to GMT/UTC - wxDateTime ToGMT() const { return ToTimezone(GMT0); } - wxDateTime& MakeGMT() { return MakeTimezone(GMT0); } + wxDateTime ToGMT(bool noDST = FALSE) const { return ToTimezone(GMT0, noDST); } + wxDateTime& MakeGMT(bool noDST = FALSE) { return MakeTimezone(GMT0, noDST); } // is daylight savings time in effect at this moment according to the // rules of the specified country? @@ -692,9 +754,8 @@ public: // result of timezone shift) // ------------------------------------------------------------------------ - // is the date valid (FALSE for uninitialized objects as well as after - // the functions which failed to convert the date to supported range) - inline bool IsValid() const { return this != &ms_InvDateTime; } + // is the date valid (TRUE even for non initialized objects)? + inline bool IsValid() const { return this != &wxInvalidDateTime; } // get the broken down date/time representation in the given timezone // @@ -708,48 +769,49 @@ public: inline time_t GetTicks() const; // get the year (returns Inv_Year if date is invalid) - int GetYear(const TimeZone& tz = Local) const + int GetYear(const TimeZone& tz = Local) const { return GetTm(tz).year; } // get the month (Inv_Month if date is invalid) - Month GetMonth(const TimeZone& tz = Local) const + Month GetMonth(const TimeZone& tz = Local) const { return (Month)GetTm(tz).mon; } // get the month day (in 1..31 range, 0 if date is invalid) - wxDateTime_t GetDay(const TimeZone& tz = Local) const + wxDateTime_t GetDay(const TimeZone& tz = Local) const { return GetTm(tz).mday; } // get the day of the week (Inv_WeekDay if date is invalid) - WeekDay GetWeekDay(const TimeZone& tz = Local) const + WeekDay GetWeekDay(const TimeZone& tz = Local) const { return GetTm(tz).GetWeekDay(); } // get the hour of the day - wxDateTime_t GetHour(const TimeZone& tz = Local) const + wxDateTime_t GetHour(const TimeZone& tz = Local) const { return GetTm(tz).hour; } // get the minute - wxDateTime_t GetMinute(const TimeZone& tz = Local) const + wxDateTime_t GetMinute(const TimeZone& tz = Local) const { return GetTm(tz).min; } // get the second - wxDateTime_t GetSecond(const TimeZone& tz = Local) const + wxDateTime_t GetSecond(const TimeZone& tz = Local) const { return GetTm(tz).sec; } // get milliseconds - wxDateTime_t GetMillisecond(const TimeZone& tz = Local) const + wxDateTime_t GetMillisecond(const TimeZone& tz = Local) const { return GetTm(tz).msec; } // get the day since the year start (1..366, 0 if date is invalid) wxDateTime_t GetDayOfYear(const TimeZone& tz = Local) const; // get the week number since the year start (1..52 or 53, 0 if date is // invalid) - wxDateTime_t GetWeekOfYear(const TimeZone& tz = Local) const; + wxDateTime_t GetWeekOfYear(WeekFlags flags = Monday_First, + const TimeZone& tz = Local) const; // get the week number since the month start (1..5, 0 if date is // invalid) - wxDateTime_t GetWeekOfMonth(const TimeZone& tz = Local) const; + wxDateTime_t GetWeekOfMonth(WeekFlags flags = Monday_First, + const TimeZone& tz = Local) const; // is this date a work day? This depends on a country, of course, // because the holidays are different in different countries - bool IsWorkDay(Country country = Country_Default, - const TimeZone& tz = Local) const; + bool IsWorkDay(Country country = Country_Default) const; // is this date later than Gregorian calendar introduction for the // given country (see enum GregorianAdoption)? // - // NB: this function shouldn't be considered as absolute authoiruty in + // NB: this function shouldn't be considered as absolute authority in // the matter. Besides, for some countries the exact date of // adoption of the Gregorian calendar is simply unknown. bool IsGregorianDate(GregorianAdoption country = Gr_Standard) const; @@ -773,6 +835,15 @@ public: // returns TRUE if the date is in the given range inline bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const; + // do these two objects refer to the same date? + inline bool IsSameDate(const wxDateTime& dt) const; + + // do these two objects have the same time? + inline bool IsSameTime(const wxDateTime& dt) const; + + // are these two objects equal up to given timespan? + inline bool IsEqualUpTo(const wxDateTime& dt, const wxTimeSpan& ts) const; + // arithmetics with dates (see also below for more operators) // ------------------------------------------------------------------------ @@ -798,7 +869,7 @@ public: inline wxDateTime& operator+=(const wxDateSpan& diff); // return the difference of the date with a date span - inline wxDateTime& Substract(const wxDateSpan& diff) const; + inline wxDateTime Substract(const wxDateSpan& diff) const; // substract a date span (positive or negative) inline wxDateTime& Substract(const wxDateSpan& diff); // substract a date span (positive or negative) @@ -815,9 +886,13 @@ public: // parse a string in RFC 822 format (found e.g. in mail headers and // having the form "Wed, 10 Feb 1999 19:07:07 +0100") const wxChar *ParseRfc822Date(const wxChar* date); - // parse a date/time in the given format (see strptime(3)) + // parse a date/time in the given format (see strptime(3)), fill in + // the missing (in the string) fields with the values of dateDef (by + // default, they will not change if they had valid values or will + // default to Today() otherwise) const wxChar *ParseFormat(const wxChar *date, - const wxChar *format = _T("%c")); + const wxChar *format = _T("%c"), + const wxDateTime& dateDef = wxDefaultDateTime); // parse a string containing the date/time in "free" format, this // function will try to make an educated guess at the string contents const wxChar *ParseDateTime(const wxChar *datetime); @@ -837,6 +912,12 @@ public: wxString FormatDate() const { return Format(_T("%x")); } // preferred time representation for the current locale wxString FormatTime() const { return Format(_T("%X")); } + // returns the string representing the date in ISO 8601 format + // (YYYY-MM-DD) + wxString FormatISODate() const { return Format(_T("%Y-%m-%d")); } + // returns the string representing the time in ISO 8601 format + // (HH:MM:SS) + wxString FormatISOTime() const { return Format(_T("%H:%M:%S")); } // implementation // ------------------------------------------------------------------------ @@ -868,10 +949,6 @@ private: // fixed to 1000 static const long TIME_T_FACTOR; - // invalid wxDateTime object - returned by all functions which return - // "wxDateTime &" on failure - static wxDateTime ms_InvDateTime; - // returns TRUE if we fall in range in which we can use standard ANSI C // functions inline bool IsInStdRange() const; @@ -895,19 +972,24 @@ public: // ------------------------------------------------------------------------ // return the timespan for the given number of seconds - static wxTimeSpan Seconds(int sec) { return wxTimeSpan(0, 0, sec); } + static wxTimeSpan Seconds(long sec) { return wxTimeSpan(0, 0, sec); } + static wxTimeSpan Second() { return Seconds(1); } // return the timespan for the given number of minutes - static wxTimeSpan Minutes(int min) { return wxTimeSpan(0, min, 0 ); } + static wxTimeSpan Minutes(long min) { return wxTimeSpan(0, min, 0 ); } + static wxTimeSpan Minute() { return Minutes(1); } // return the timespan for the given number of hours - static wxTimeSpan Hours(int hours) { return wxTimeSpan(hours, 0, 0); } + static wxTimeSpan Hours(long hours) { return wxTimeSpan(hours, 0, 0); } + static wxTimeSpan Hour() { return Hours(1); } // return the timespan for the given number of days - static wxTimeSpan Days(int days) { return Hours(24 * days); } + static wxTimeSpan Days(long days) { return Hours(24 * days); } + static wxTimeSpan Day() { return Days(1); } // return the timespan for the given number of weeks - static wxTimeSpan Weeks(int days) { return Days(7 * days); } + static wxTimeSpan Weeks(long days) { return Days(7 * days); } + static wxTimeSpan Week() { return Weeks(1); } // default ctor constructs the 0 time span wxTimeSpan() { } @@ -915,10 +997,10 @@ public: // from separate values for each component, date set to 0 (hours are // not restricted to 0..24 range, neither are minutes, seconds or // milliseconds) - inline wxTimeSpan(int hours, - int minutes = 0, - int seconds = 0, - int milliseconds = 0); + inline wxTimeSpan(long hours, + long minutes = 0, + long seconds = 0, + long milliseconds = 0); // default copy ctor is ok @@ -1040,7 +1122,12 @@ private: // one month to Feb, 15 - we want to get Mar, 15, of course). // // When adding a month to the date, all lesser components (days, hours, ...) -// won't be changed. +// won't be changed unless the resulting date would be invalid: for example, +// Jan 31 + 1 month will be Feb 28, not (non existing) Feb 31. +// +// Because of this feature, adding and substracting back again the same +// wxDateSpan will *not*, in general give back the original date: Feb 28 - 1 +// month will be Jan 28, not Jan 31! // // wxDateSpan can be either positive or negative. They may be // multiplied by scalars which multiply all deltas by the scalar: i.e. 2*(1 @@ -1073,15 +1160,19 @@ public: // get an object for the given number of days static wxDateSpan Days(int days) { return wxDateSpan(0, 0, 0, days); } + static wxDateSpan Day() { return Days(1); } // get an object for the given number of weeks static wxDateSpan Weeks(int weeks) { return wxDateSpan(0, 0, weeks, 0); } + static wxDateSpan Week() { return Weeks(1); } // get an object for the given number of months static wxDateSpan Months(int mon) { return wxDateSpan(0, mon, 0, 0); } + static wxDateSpan Month() { return Months(1); } // get an object for the given number of years static wxDateSpan Years(int years) { return wxDateSpan(years, 0, 0, 0); } + static wxDateSpan Year() { return Years(1); } // default copy ctor is ok @@ -1148,10 +1239,77 @@ private: m_days; }; -WXDLLEXPORT_DATA(extern wxDateSpan) wxYear; -WXDLLEXPORT_DATA(extern wxDateSpan) wxMonth; -WXDLLEXPORT_DATA(extern wxDateSpan) wxWeek; -WXDLLEXPORT_DATA(extern wxDateSpan) wxDay; +// ---------------------------------------------------------------------------- +// wxDateTimeArray: array of dates. +// ---------------------------------------------------------------------------- + +#include "wx/dynarray.h" + +WX_DECLARE_OBJARRAY(wxDateTime, wxDateTimeArray); + +// ---------------------------------------------------------------------------- +// wxDateTimeHolidayAuthority: an object of this class will decide whether a +// given date is a holiday and is used by all functions working with "work +// days". +// +// NB: the base class is an ABC, derived classes must implement the pure +// virtual methods to work with the holidays they correspond to. +// ---------------------------------------------------------------------------- + +class WXDLLEXPORT wxDateTimeHolidayAuthority; +WX_DEFINE_EXPORTED_ARRAY(wxDateTimeHolidayAuthority *, wxHolidayAuthoritiesArray); + +class wxDateTimeHolidaysModule; +class WXDLLEXPORT wxDateTimeHolidayAuthority +{ + friend wxDateTimeHolidaysModule; +public: + // returns TRUE if the given date is a holiday + static bool IsHoliday(const wxDateTime& dt); + + // fills the provided array with all holidays in the given range, returns + // the number of them + static size_t GetHolidaysInRange(const wxDateTime& dtStart, + const wxDateTime& dtEnd, + wxDateTimeArray& holidays); + + // clear the list of holiday authorities + static void ClearAllAuthorities(); + + // add a new holiday authority (the pointer will be deleted by + // wxDateTimeHolidayAuthority) + static void AddAuthority(wxDateTimeHolidayAuthority *auth); + +protected: + // this function is called to determine whether a given day is a holiday + virtual bool DoIsHoliday(const wxDateTime& dt) const = 0; + + // this function should fill the array with all holidays between the two + // given dates - it is implemented in the base class, but in a very + // inefficient way (it just iterates over all days and uses IsHoliday() for + // each of them), so it must be overridden in the derived class where the + // base class version may be explicitly used if needed + // + // returns the number of holidays in the given range and fills holidays + // array + virtual size_t DoGetHolidaysInRange(const wxDateTime& dtStart, + const wxDateTime& dtEnd, + wxDateTimeArray& holidays) const = 0; + +private: + // all holiday authorities + static wxHolidayAuthoritiesArray ms_authorities; +}; + +// the holidays for this class are all Saturdays and Sundays +class WXDLLEXPORT wxDateTimeWorkDays : public wxDateTimeHolidayAuthority +{ +protected: + virtual bool DoIsHoliday(const wxDateTime& dt) const; + virtual size_t DoGetHolidaysInRange(const wxDateTime& dtStart, + const wxDateTime& dtEnd, + wxDateTimeArray& holidays) const; +}; // ============================================================================ // inline functions implementation