chart2/source/inc/CommonFunctors.hxx

   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
   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 #ifndef INCLUDED_CHART2_SOURCE_INC_COMMONFUNCTORS_HXX
  20 #define INCLUDED_CHART2_SOURCE_INC_COMMONFUNCTORS_HXX
  21
  22 #include <o3tl/any.hxx>
  23 #include <rtl/math.hxx>
  24 #include <com/sun/star/uno/Any.hxx>
  25 #include <rtl/ustring.hxx>
  26 #include "charttoolsdllapi.hxx"
  27
  28 namespace chart
  29 {
  30 namespace CommonFunctors
  31 {
  32
  33 /** unary function to convert any type T into a css::uno::Any.
  34
  35     <p>uno::makeAny is an inline function.  Thus is cannot be taken directly
  36     (via mem_fun_ptr)</p>
  37 */
  38 template< typename T >
  39     struct makeAny
  40 {
  41     css::uno::Any operator() ( const T & aVal )
  42     {
  43         return css::uno::makeAny( aVal );
  44     }
  45 };
  46
  47 /** unary function to convert css::uno::Any into a double number.
  48
  49     <p>In case no number can be generated from the Any, NaN (see
  50     rtl::math::SetNAN()) is returned.</p>
  51 */
  52 struct OOO_DLLPUBLIC_CHARTTOOLS AnyToDouble
  53 {
  54     double operator() ( const css::uno::Any & rAny )
  55     {
  56         double fResult;
  57         ::rtl::math::setNan( & fResult );
  58         rAny >>= fResult;
  59         return fResult;
  60     }
  61 };
  62
  63 /** unary function to convert css::uno::Any into an
  64     OUString.
  65 */
  66 struct OOO_DLLPUBLIC_CHARTTOOLS AnyToString
  67 {
  68     OUString operator() ( const css::uno::Any & rAny )
  69     {
  70         if( auto pDouble = o3tl::tryAccess<double>(rAny) )
  71         {
  72             if( ::rtl::math::isNan(*pDouble) )
  73                 return OUString();
  74             return ::rtl::math::doubleToUString(
  75                 * pDouble,
  76                 rtl_math_StringFormat_Automatic,
  77                 rtl_math_DecimalPlaces_Max, // use maximum decimal places available
  78                 sal_Char( '.' ), // decimal separator
  79                 true // remove trailing zeros
  80                 );
  81         }
  82         else if( auto s = o3tl::tryAccess<OUString>(rAny) )
  83         {
  84             return *s;
  85         }
  86
  87         return OUString();
  88     }
  89 };
  90
  91 /** unary function to convert an OUString into a double number.
  92
  93     <p>For conversion rtl::math::StringToDouble is used.</p>
  94  */
  95 struct OOO_DLLPUBLIC_CHARTTOOLS OUStringToDouble
  96 {
  97     double operator() ( const OUString & rStr )
  98     {
  99         rtl_math_ConversionStatus eConversionStatus;
 100         double fResult = ::rtl::math::stringToDouble( rStr, '.', ',', & eConversionStatus );
 101
 102         if( eConversionStatus != rtl_math_ConversionStatus_Ok )
 103             ::rtl::math::setNan( & fResult );
 104
 105         return fResult;
 106     }
 107 };
 108
 109 /** unary function to convert a double number into an OUString.
 110
 111     <p>For conversion rtl::math::DoubleToOUString is used.</p>
 112  */
 113 struct OOO_DLLPUBLIC_CHARTTOOLS DoubleToOUString
 114 {
 115     OUString operator() ( double fNumber )
 116     {
 117         return ::rtl::math::doubleToUString(
 118             fNumber,
 119             rtl_math_StringFormat_Automatic,
 120             rtl_math_DecimalPlaces_Max, // use maximum decimal places available
 121             static_cast< sal_Char >( '.' ),
 122             true
 123             );
 124     }
 125 };
 126
 127 } //  namespace CommonFunctors
 128 } //  namespace chart
 129
 130 // INCLUDED_CHART2_SOURCE_INC_COMMONFUNCTORS_HXX
 131 #endif
 132
 133 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */