/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

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 * 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 <Scaling.hxx>

#include <com/sun/star/uno/RuntimeException.hpp>

#include <cppuhelper/supportsservice.hxx>

#include <cmath>

#include <limits>

namespace com::sun::star::uno { class XComponentContext; }

namespace

{

constexpr OUString lcl_aServiceName_Logarithmic = u"com.sun.star.chart2.LogarithmicScaling"_ustr;

constexpr OUString lcl_aServiceName_Exponential = u"com.sun.star.chart2.ExponentialScaling"_ustr;

constexpr OUString lcl_aServiceName_Linear = u"com.sun.star.chart2.LinearScaling"_ustr;

constexpr OUString lcl_aServiceName_Power = u"com.sun.star.chart2.PowerScaling"_ustr;

}

namespace chart

{

using namespace ::com::sun::star;

using namespace ::com::sun::star::chart2;

LogarithmicScaling::LogarithmicScaling() :

        m_fBase( 10.0 ),

        m_fLogOfBase( log( 10.0 ) )

{

}

LogarithmicScaling::LogarithmicScaling( double fBase ) :

        m_fBase( fBase ),

        m_fLogOfBase( log( fBase ) )

{

}

LogarithmicScaling::~LogarithmicScaling()

{

}

double SAL_CALL LogarithmicScaling::doScaling( double value )

{

    if( std::isnan( value ) || std::isinf( value ) )

        return std::numeric_limits<double>::quiet_NaN();

    return std::log( value ) / m_fLogOfBase;

}

uno::Reference< XScaling > SAL_CALL LogarithmicScaling::getInverseScaling()

{

    return new ExponentialScaling( m_fBase );

}

OUString SAL_CALL LogarithmicScaling::getServiceName()

{

    return lcl_aServiceName_Logarithmic;

}

OUString SAL_CALL LogarithmicScaling::getImplementationName()

{

    return lcl_aServiceName_Logarithmic;

}

sal_Bool SAL_CALL LogarithmicScaling::supportsService( const OUString& rServiceName )

{

    return cppu::supportsService(this, rServiceName);

}

css::uno::Sequence< OUString > SAL_CALL LogarithmicScaling::getSupportedServiceNames()

{

    return { lcl_aServiceName_Logarithmic };

}

ExponentialScaling::ExponentialScaling() :

        m_fBase( 10.0 )

{

}

ExponentialScaling::ExponentialScaling( double fBase ) :

        m_fBase( fBase )

{

}

ExponentialScaling::~ExponentialScaling()

{

}

double SAL_CALL ExponentialScaling::doScaling( double value )

{

    if( std::isnan( value ) || std::isinf( value ) )

        return std::numeric_limits<double>::quiet_NaN();

    return std::pow( m_fBase, value );

}

uno::Reference< XScaling > SAL_CALL ExponentialScaling::getInverseScaling()

{

    return new LogarithmicScaling( m_fBase );

}

OUString SAL_CALL ExponentialScaling::getServiceName()

{

    return lcl_aServiceName_Exponential;

}

OUString SAL_CALL ExponentialScaling::getImplementationName()

{

    return lcl_aServiceName_Exponential;

}

sal_Bool SAL_CALL ExponentialScaling::supportsService( const OUString& rServiceName )

{

    return cppu::supportsService(this, rServiceName);

}

css::uno::Sequence< OUString > SAL_CALL ExponentialScaling::getSupportedServiceNames()

{

    return { lcl_aServiceName_Exponential };

}

LinearScaling::LinearScaling() :

        m_fSlope( 1.0 ),

        m_fOffset( 0.0 )

{}

LinearScaling::LinearScaling( double fSlope, double fOffset ) :

        m_fSlope( fSlope ),

        m_fOffset( fOffset )

{}

LinearScaling::~LinearScaling()

{}

double SAL_CALL LinearScaling::doScaling( double value )

{

    if( std::isnan( value ) || std::isinf( value ) )

        return std::numeric_limits<double>::quiet_NaN();

    return m_fOffset + m_fSlope * value;

}

uno::Reference< XScaling > SAL_CALL

    LinearScaling::getInverseScaling()

{

    // ToDo: ApproxEqual ?

    if( m_fSlope == 0 )

        throw uno::RuntimeException(u"Divide by zero exception"_ustr);

    return new LinearScaling( 1.0 / m_fSlope, m_fOffset / m_fSlope );

}

OUString SAL_CALL LinearScaling::getServiceName()

{

    return lcl_aServiceName_Linear;

}

OUString SAL_CALL LinearScaling::getImplementationName()

{

    return lcl_aServiceName_Linear ;

}

sal_Bool SAL_CALL LinearScaling::supportsService( const OUString& rServiceName )

{

    return cppu::supportsService(this, rServiceName);

}

css::uno::Sequence< OUString > SAL_CALL LinearScaling::getSupportedServiceNames()

{

    return { lcl_aServiceName_Linear };

}

PowerScaling::PowerScaling() :

        m_fExponent( 10.0 )

{}

PowerScaling::PowerScaling( double fExponent ) :

        m_fExponent( fExponent )

{}

PowerScaling::~PowerScaling()

{}

double SAL_CALL PowerScaling::doScaling( double value )

{

    if( std::isnan( value ) || std::isinf( value ) )

        return std::numeric_limits<double>::quiet_NaN();

    return std::pow( value, m_fExponent );

}

uno::Reference< XScaling > SAL_CALL

    PowerScaling::getInverseScaling()

{

    // ToDo: ApproxEqual ?

    if( m_fExponent == 0 )

        throw uno::RuntimeException(u"Divide by zero exception"_ustr);

    return new PowerScaling( 1.0 / m_fExponent );

}

    OUString SAL_CALL

PowerScaling::getServiceName()

{

    return lcl_aServiceName_Power;

}

OUString SAL_CALL PowerScaling::getImplementationName()

{

    return lcl_aServiceName_Power;

}

sal_Bool SAL_CALL PowerScaling::supportsService( const OUString& rServiceName )

{

    return cppu::supportsService(this, rServiceName);

}

css::uno::Sequence< OUString > SAL_CALL PowerScaling::getSupportedServiceNames()

{

    return { lcl_aServiceName_Power };

}

} //namespace chart

extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *

com_sun_star_chart2_LinearScaling_get_implementation(css::uno::XComponentContext *,

        css::uno::Sequence<css::uno::Any> const &)

{

    return cppu::acquire(new chart::LinearScaling );

}

extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *

com_sun_star_chart2_ExponentialScaling_get_implementation(css::uno::XComponentContext *,

        css::uno::Sequence<css::uno::Any> const &)

{

    return cppu::acquire(new chart::ExponentialScaling );

}

extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *

com_sun_star_chart2_LogarithmicScaling_get_implementation(css::uno::XComponentContext *,

        css::uno::Sequence<css::uno::Any> const &)

{

    return cppu::acquire(new chart::LogarithmicScaling );

}

extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *

com_sun_star_chart2_PowerScaling_get_implementation(css::uno::XComponentContext *,

        css::uno::Sequence<css::uno::Any> const &)

{

    return cppu::acquire(new chart::PowerScaling );

}

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