chart2/source/view/axes/DateScaling.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.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
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   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
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  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 "DateScaling.hxx"
  21 #include <com/sun/star/chart/TimeUnit.hpp>
  22 #include <rtl/math.hxx>
  23 #include <cppuhelper/supportsservice.hxx>
  24
  25 #include <limits>
  26
  27 namespace
  28 {
  29
  30 constexpr OUString lcl_aServiceName_DateScaling = u"com.sun.star.chart2.DateScaling"_ustr;
  31 constexpr OUString lcl_aServiceName_InverseDateScaling
  32     = u"com.sun.star.chart2.InverseDateScaling"_ustr;
  33
  34 const double lcl_fNumberOfMonths = 12.0;//todo: this needs to be offered by basic tools Date class if it should be more generic
  35 }
  36
  37 namespace chart
  38 {
  39 using namespace ::com::sun::star;
  40 using namespace ::com::sun::star::chart2;
  41 using ::com::sun::star::chart::TimeUnit::DAY;
  42 using ::com::sun::star::chart::TimeUnit::MONTH;
  43 using ::com::sun::star::chart::TimeUnit::YEAR;
  44
  45 DateScaling::DateScaling( const Date& rNullDate, sal_Int32 nTimeUnit, bool bShifted )
  46         : m_aNullDate( rNullDate )
  47         , m_nTimeUnit( nTimeUnit )
  48         , m_bShifted( bShifted )
  49 {
  50 }
  51
  52 DateScaling::~DateScaling()
  53 {
  54 }
  55
  56 double SAL_CALL DateScaling::doScaling( double value )
  57 {
  58     double fResult(value);
  59     if( std::isnan( value ) || std::isinf( value ) )
  60         return std::numeric_limits<double>::quiet_NaN();
  61     switch( m_nTimeUnit )
  62     {
  63         case DAY:
  64             fResult = value;
  65             if(m_bShifted)
  66                 fResult+=0.5;
  67             break;
  68         case YEAR:
  69         case MONTH:
  70         default:
  71         {
  72             Date aDate(m_aNullDate);
  73             aDate.AddDays(::rtl::math::approxFloor(value));
  74             fResult = aDate.GetYear();
  75             fResult *= lcl_fNumberOfMonths;//assuming equal count of months in each year
  76             fResult += aDate.GetMonth();
  77
  78             double fDayOfMonth = aDate.GetDay();
  79             fDayOfMonth -= 1.0;
  80             double fDaysInMonth = aDate.GetDaysInMonth();
  81             fResult += fDayOfMonth/fDaysInMonth;
  82             if(m_bShifted)
  83             {
  84                 if( m_nTimeUnit==YEAR )
  85                     fResult += 0.5*lcl_fNumberOfMonths;
  86                 else
  87                     fResult += 0.5;
  88             }
  89             break;
  90         }
  91     }
  92     return fResult;
  93 }
  94
  95 uno::Reference< XScaling > SAL_CALL DateScaling::getInverseScaling()
  96 {
  97     return new InverseDateScaling( m_aNullDate, m_nTimeUnit, m_bShifted );
  98 }
  99
 100 OUString SAL_CALL DateScaling::getServiceName()
 101 {
 102     return lcl_aServiceName_DateScaling;
 103 }
 104
 105 OUString SAL_CALL DateScaling::getImplementationName()
 106 {
 107     return lcl_aServiceName_DateScaling;
 108 }
 109
 110 sal_Bool SAL_CALL DateScaling::supportsService( const OUString& rServiceName )
 111 {
 112     return cppu::supportsService(this, rServiceName);
 113 }
 114
 115 css::uno::Sequence< OUString > SAL_CALL DateScaling::getSupportedServiceNames()
 116 {
 117     return { lcl_aServiceName_DateScaling };
 118 }
 119
 120 InverseDateScaling::InverseDateScaling( const Date& rNullDate, sal_Int32 nTimeUnit, bool bShifted )
 121         : m_aNullDate( rNullDate )
 122         , m_nTimeUnit( nTimeUnit )
 123         , m_bShifted( bShifted )
 124 {
 125 }
 126
 127 InverseDateScaling::~InverseDateScaling()
 128 {
 129 }
 130
 131 double SAL_CALL InverseDateScaling::doScaling( double value )
 132 {
 133     double fResult(value);
 134     if( std::isnan( value ) || std::isinf( value ) )
 135         return std::numeric_limits<double>::quiet_NaN();
 136     else
 137     {
 138         switch( m_nTimeUnit )
 139         {
 140             case DAY:
 141                 if(m_bShifted)
 142                     value -= 0.5;
 143                 fResult = value;
 144                 break;
 145             case YEAR:
 146             case MONTH:
 147             default:
 148                 //Date aDate(m_aNullDate);
 149                 if(m_bShifted)
 150                 {
 151                     if( m_nTimeUnit==YEAR )
 152                         value -= 0.5*lcl_fNumberOfMonths;
 153                     else
 154                         value -= 0.5;
 155                 }
 156                 Date aDate( Date::EMPTY );
 157                 double fYear = ::rtl::math::approxFloor(value/lcl_fNumberOfMonths);
 158                 double fMonth = ::rtl::math::approxFloor(value-(fYear*lcl_fNumberOfMonths));
 159                 if( fMonth==0.0 )
 160                 {
 161                     fYear--;
 162                     fMonth=12.0;
 163                 }
 164                 aDate.SetYear( static_cast<sal_uInt16>(fYear) );
 165                 aDate.SetMonth( static_cast<sal_uInt16>(fMonth) );
 166                 aDate.SetDay( 1 );
 167                 double fMonthCount = (fYear*lcl_fNumberOfMonths)+fMonth;
 168                 double fDay = (value-fMonthCount)*aDate.GetDaysInMonth();
 169                 fDay += 1.0;
 170                 aDate.SetDay( static_cast<sal_uInt16>(::rtl::math::round(fDay)) );
 171                 fResult = aDate - m_aNullDate;
 172                 break;
 173         }
 174     }
 175     return fResult;
 176 }
 177
 178 uno::Reference< XScaling > SAL_CALL InverseDateScaling::getInverseScaling()
 179 {
 180     return new DateScaling( m_aNullDate, m_nTimeUnit, m_bShifted );
 181 }
 182
 183 OUString SAL_CALL InverseDateScaling::getServiceName()
 184 {
 185     return lcl_aServiceName_InverseDateScaling;
 186 }
 187
 188 OUString SAL_CALL InverseDateScaling::getImplementationName()
 189 {
 190     return lcl_aServiceName_InverseDateScaling;
 191 }
 192
 193 sal_Bool SAL_CALL InverseDateScaling::supportsService( const OUString& rServiceName )
 194 {
 195     return cppu::supportsService(this, rServiceName);
 196 }
 197
 198 css::uno::Sequence< OUString > SAL_CALL InverseDateScaling::getSupportedServiceNames()
 199 {
 200     return { lcl_aServiceName_InverseDateScaling };
 201 }
 202
 203 } //namespace chart
 204
 205 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */