chart2/source/view/axes/DateHelper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "DateHelper.hxx"
  21 #include "DateScaling.hxx"
  22 #include <rtl/math.hxx>
  23 #include <com/sun/star/chart/TimeUnit.hpp>
  24
  25 namespace chart
  26 {
  27 using namespace ::com::sun::star;
  28
  29 bool DateHelper::IsInSameYear( const Date& rD1, const Date& rD2 )
  30 {
  31     return rD1.GetYear() == rD2.GetYear();
  32 }
  33
  34 bool DateHelper::IsInSameMonth( const Date& rD1, const Date& rD2 )
  35 {
  36     return (rD1.GetYear() == rD2.GetYear())
  37         && (rD1.GetMonth() == rD2.GetMonth());
  38 }
  39
  40 Date DateHelper::GetDateSomeMonthsAway( const Date& rD, long nMonthDistance )
  41 {
  42     Date aRet(rD);
  43     long nMonth = rD.GetMonth()+nMonthDistance;
  44     long nNewMonth = nMonth%12;
  45     long nNewYear = rD.GetYear() + nMonth/12;
  46     if( nMonth <= 0 || !nNewMonth )
  47         nNewYear--;
  48     if( nNewMonth <= 0 )
  49         nNewMonth += 12;
  50     aRet.SetMonth( sal_uInt16(nNewMonth) );
  51     aRet.SetYear( sal_uInt16(nNewYear) );
  52     aRet.Normalize();
  53     return aRet;
  54 }
  55
  56 Date DateHelper::GetDateSomeYearsAway( const Date& rD, long nYearDistance )
  57 {
  58     Date aRet(rD);
  59     aRet.SetYear( static_cast<sal_uInt16>(rD.GetYear()+nYearDistance) );
  60     aRet.Normalize();
  61     return aRet;
  62 }
  63
  64 bool DateHelper::IsLessThanOneMonthAway( const Date& rD1, const Date& rD2 )
  65 {
  66     Date aDMin( DateHelper::GetDateSomeMonthsAway( rD1, -1 ) );
  67     Date aDMax( DateHelper::GetDateSomeMonthsAway( rD1, 1 ) );
  68
  69     if( rD2 > aDMin && rD2 < aDMax )
  70         return true;
  71     return false;
  72 }
  73
  74 bool DateHelper::IsLessThanOneYearAway( const Date& rD1, const Date& rD2 )
  75 {
  76     Date aDMin( DateHelper::GetDateSomeYearsAway( rD1, -1 ) );
  77     Date aDMax( DateHelper::GetDateSomeYearsAway( rD1, 1 ) );
  78
  79     if( rD2 > aDMin && rD2 < aDMax )
  80         return true;
  81     return false;
  82 }
  83
  84 double DateHelper::RasterizeDateValue( double fValue, const Date& rNullDate, long TimeResolution )
  85 {
  86     Date aDate(rNullDate); aDate += static_cast<long>(::rtl::math::approxFloor(fValue));
  87     switch(TimeResolution)
  88     {
  89         case ::com::sun::star::chart::TimeUnit::DAY:
  90             break;
  91         case ::com::sun::star::chart::TimeUnit::YEAR:
  92             aDate.SetMonth(1);
  93             aDate.SetDay(1);
  94             break;
  95         case ::com::sun::star::chart::TimeUnit::MONTH:
  96         default:
  97             aDate.SetDay(1);
  98             break;
  99     }
 100     return aDate - rNullDate;
 101 }
 102
 103 } //namespace chart
 104
 105 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */