1 files changed, 132 insertions, 0 deletions
diff --git a/chart2/source/view/axes/DateHelper.cxx b/chart2/source/view/axes/DateHelper.cxx
new file mode 100644
index 000000000000..7159a733498f
--- /dev/null
+++ b/chart2/source/view/axes/DateHelper.cxx
@@ -0,0 +1,132 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
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+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_chart2.hxx"
+#include "DateHelper.hxx"
+#include "DateScaling.hxx"
+#include <rtl/math.hxx>
+#include <com/sun/star/chart/TimeUnit.hpp>
+
+//.............................................................................
+namespace chart
+{
+//.............................................................................
+using namespace ::com::sun::star;
+
+bool DateHelper::IsInSameYear( const Date& rD1, const Date& rD2 )
+{
+    return rD1.GetYear() == rD2.GetYear();
+}
+bool DateHelper::IsInSameMonth( const Date& rD1, const Date& rD2 )
+{
+    return (rD1.GetYear() == rD2.GetYear())
+        && (rD1.GetMonth() == rD2.GetMonth());
+}
+long DateHelper::GetMonthsBetweenDates( Date aD1, Date aD2 )
+{
+    Date aHelp = aD1;
+    long nSign = 1;
+    if( aD1 < aD2 )
+    {
+        aD1 = aD2;
+        aD2 = aHelp;
+        nSign = -1;
+    }
+
+    return nSign*( ( aD1.GetMonth() - aD2.GetMonth() )
+        + ( aD1.GetYear() - aD2.GetYear() )*12 );
+}
+
+Date DateHelper::GetDateSomeMonthsAway( const Date& rD, long nMonthDistance )
+{
+    Date aRet(rD);
+    long nMonth = rD.GetMonth()+nMonthDistance;
+    long nNewMonth = nMonth%12;
+    long nNewYear = rD.GetYear() + nMonth/12;
+    if( nMonth <= 0 || !nNewMonth )
+        nNewYear--;
+    if( nNewMonth <= 0 )
+        nNewMonth += 12;
+    aRet.SetMonth( sal_uInt16(nNewMonth) );
+    aRet.SetYear( sal_uInt16(nNewYear) );
+    while(!aRet.IsValid())
+        aRet--;
+    return aRet;
+}
+
+Date DateHelper::GetDateSomeYearsAway( const Date& rD, long nYearDistance )
+{
+    Date aRet(rD);
+    aRet.SetYear( static_cast<sal_uInt16>(rD.GetYear()+nYearDistance) );
+    while(!aRet.IsValid())
+        aRet--;
+    return aRet;
+}
+
+bool DateHelper::IsLessThanOneMonthAway( const Date& rD1, const Date& rD2 )
+{
+    Date aDMin( DateHelper::GetDateSomeMonthsAway( rD1, -1 ) );
+    Date aDMax( DateHelper::GetDateSomeMonthsAway( rD1, 1 ) );
+
+    if( rD2 > aDMin && rD2 < aDMax )
+        return true;
+    return false;
+}
+
+bool DateHelper::IsLessThanOneYearAway( const Date& rD1, const Date& rD2 )
+{
+    Date aDMin( DateHelper::GetDateSomeYearsAway( rD1, -1 ) );
+    Date aDMax( DateHelper::GetDateSomeYearsAway( rD1, 1 ) );
+
+    if( rD2 > aDMin && rD2 < aDMax )
+        return true;
+    return false;
+}
+
+double DateHelper::RasterizeDateValue( double fValue, const Date& rNullDate, long TimeResolution )
+{
+    Date aDate(rNullDate); aDate += static_cast<long>(::rtl::math::approxFloor(fValue));
+    switch(TimeResolution)
+    {
+        case ::com::sun::star::chart::TimeUnit::DAY:
+            break;
+        case ::com::sun::star::chart::TimeUnit::YEAR:
+            aDate.SetMonth(1);
+            aDate.SetDay(1);
+            break;
+        case ::com::sun::star::chart::TimeUnit::MONTH:
+        default:
+            aDate.SetDay(1);
+            break;
+    }
+    return aDate - rNullDate;
+}
+
+//.............................................................................
+} //namespace chart
+//.............................................................................