Resolves: tdf#100452 class Date full (BCE,CE) proleptic Gregorian calendar

... implementing signed years with year 0 gap.
Date(31,12,-1) last day BCE
Date(1,1,1) first day CE

New class Date member functions:
* AddYears(sal_Int16) to be used instead of
aDate.SetYear(aDate.GetYear()+sal_Int16) to handle year 0 gap.
* convenience GetNextYear() to be used insted of GetYear()+1
* convenience GetPrevYear() to be used insted of GetYear()-1
* AddMonths(sal_Int32)
* operator=(const css::util::Date&)

New class DateTime member functions:
* operator=(const css::util::DateTime&)

Made some conversion ctors explicit, specifically Date(sal_Int32)

Adapted hopefully all places that used a sal_uInt16 year to use
sal_Int16 where appropriate.

Eliminated some quirks in date handling found on the fly.

Added era handling to i18npool icu calendar setting interface, which
missing was responsible for 0001-01-01 entered in Calc being set as
-0001-01-01, hence subtracting one day resulted in -0002-12-31.

Change-Id: I77b39fba9599ebd5067d7864f6c9ebe01f6f578f
Reviewed-on: https://gerrit.libreoffice.org/27049
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins <ci@libreoffice.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/include/svtools/calendar.hxx b/include/svtools/calendar.hxx
index 144f78250821..3814d11a702b 100644
--- a/include/svtools/calendar.hxx
+++ b/include/svtools/calendar.hxx
@@ -146,7 +146,7 @@ calls or by ending a selection.
 
 #define DIB_BOLD                    ((sal_uInt16)0x0001)
 
-typedef std::set<sal_uInt32> IntDateSet;
+typedef std::set<sal_Int32> IntDateSet;
 
 
 class SVT_DLLPUBLIC Calendar : public Control
@@ -188,8 +188,8 @@ private:
     long            mnDayHeight;
     long            mnWeekWidth;
     WinBits         mnWinStyle;
-    sal_uInt16      mnFirstYear;
-    sal_uInt16      mnLastYear;
+    sal_Int16       mnFirstYear;
+    sal_Int16       mnLastYear;
     bool            mbCalc:1,
                     mbFormat:1,
                     mbDrag:1,
@@ -224,9 +224,9 @@ private:
     SVT_DLLPRIVATE sal_uInt16   ImplHitTest( const Point& rPos, Date& rDate ) const;
     SVT_DLLPRIVATE void         ImplDrawSpin(vcl::RenderContext& rRenderContext);
     SVT_DLLPRIVATE void         ImplDrawDate(vcl::RenderContext& rRenderContext, long nX, long nY,
-                                             sal_uInt16 nDay, sal_uInt16 nMonth, sal_uInt16 nYear,
+                                             sal_uInt16 nDay, sal_uInt16 nMonth, sal_Int16 nYear,
                                              DayOfWeek eDayOfWeek,
-                                             bool bOther, sal_uLong nToday);
+                                             bool bOther, sal_Int32 nToday);
     SVT_DLLPRIVATE void         ImplDraw(vcl::RenderContext& rRenderContext);
     SVT_DLLPRIVATE void         ImplUpdateDate( const Date& rDate );
     SVT_DLLPRIVATE void         ImplUpdateSelection( IntDateSet* pOld );