1 files changed, 93 insertions, 0 deletions
diff --git a/chart2/source/view/axes/DateHelper.cxx b/chart2/source/view/axes/DateHelper.cxx
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+++ b/chart2/source/view/axes/DateHelper.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <DateHelper.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());
+}
+
+Date DateHelper::GetDateSomeMonthsAway( const Date& rD, sal_Int32 nMonthDistance )
+{
+    Date aRet(rD);
+    aRet.AddMonths( nMonthDistance );
+    return aRet;
+}
+
+Date DateHelper::GetDateSomeYearsAway( const Date& rD, sal_Int32 nYearDistance )
+{
+    Date aRet(rD);
+    aRet.AddYears( static_cast<sal_Int16>(nYearDistance) );
+    return aRet;
+}
+
+bool DateHelper::IsLessThanOneMonthAway( const Date& rD1, const Date& rD2 )
+{
+    Date aDMin( DateHelper::GetDateSomeMonthsAway( rD1, -1 ) );
+    Date aDMax( DateHelper::GetDateSomeMonthsAway( rD1, 1 ) );
+
+    return rD2 > aDMin && rD2 < aDMax;
+}
+
+bool DateHelper::IsLessThanOneYearAway( const Date& rD1, const Date& rD2 )
+{
+    Date aDMin( DateHelper::GetDateSomeYearsAway( rD1, -1 ) );
+    Date aDMax( DateHelper::GetDateSomeYearsAway( rD1, 1 ) );
+
+    return rD2 > aDMin && rD2 < aDMax;
+}
+
+double DateHelper::RasterizeDateValue( double fValue, const Date& rNullDate, tools::Long TimeResolution )
+{
+    if (std::isnan(fValue))
+        return fValue;
+
+    Date aDate(rNullDate); aDate.AddDays(::rtl::math::approxFloor(fValue));
+    switch(TimeResolution)
+    {
+        case css::chart::TimeUnit::DAY:
+            break;
+        case css::chart::TimeUnit::YEAR:
+            aDate.SetMonth(1);
+            aDate.SetDay(1);
+            break;
+        case css::chart::TimeUnit::MONTH:
+        default:
+            aDate.SetDay(1);
+            break;
+    }
+    return aDate - rNullDate;
+}
+
+} //namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */