CommonFunctors.hxx

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#pragma once
 
#include <o3tl/any.hxx>
#include <rtl/math.hxx>
#include <com/sun/star/uno/Any.hxx>
#include <rtl/ustring.hxx>
#include "charttoolsdllapi.hxx"
 
#include <limits>
 
namespace chart::CommonFunctors
{
 
template< typename T >
    struct makeAny
{
    css::uno::Any operator() ( const T & aVal )
    {
        return css::uno::Any( aVal );
    }
};
 
struct OOO_DLLPUBLIC_CHARTTOOLS AnyToDouble
{
    double operator() ( const css::uno::Any & rAny )
    {
        double fResult = std::numeric_limits<double>::quiet_NaN();
        rAny >>= fResult;
        return fResult;
    }
};
 
struct OOO_DLLPUBLIC_CHARTTOOLS AnyToString
{
    OUString operator() ( const css::uno::Any & rAny )
    {
        if( auto pDouble = o3tl::tryAccess<double>(rAny) )
        {
            if( std::isnan(*pDouble) )
                return OUString();
            return ::rtl::math::doubleToUString(
                * pDouble,
                rtl_math_StringFormat_Automatic,
                rtl_math_DecimalPlaces_Max, // use maximum decimal places available
                '.', // decimal separator
                true // remove trailing zeros
                );
        }
        else if( auto s = o3tl::tryAccess<OUString>(rAny) )
        {
            return *s;
        }
 
        return OUString();
    }
};
 
struct OOO_DLLPUBLIC_CHARTTOOLS OUStringToDouble
{
    double operator() ( std::u16string_view rStr )
    {
        rtl_math_ConversionStatus eConversionStatus;
        double fResult = ::rtl::math::stringToDouble( rStr, '.', ',', & eConversionStatus );
 
        if( eConversionStatus != rtl_math_ConversionStatus_Ok )
            return std::numeric_limits<double>::quiet_NaN();
 
        return fResult;
    }
};
 
struct OOO_DLLPUBLIC_CHARTTOOLS DoubleToOUString
{
    OUString operator() ( double fNumber )
    {
        return ::rtl::math::doubleToUString(
            fNumber,
            rtl_math_StringFormat_Automatic,
            rtl_math_DecimalPlaces_Max, // use maximum decimal places available
            '.',
            true
            );
    }
};
 
} //  namespace chart::CommonFunctors
 
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