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| -rw-r--r-- | chart2/source/tools/Scaling.cxx | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/chart2/source/tools/Scaling.cxx b/chart2/source/tools/Scaling.cxx new file mode 100644 index 000000000..b49dab6d6 --- /dev/null +++ b/chart2/source/tools/Scaling.cxx @@ -0,0 +1,267 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * 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 OUStringLiteral lcl_aServiceName_Logarithmic = u"com.sun.star.chart2.LogarithmicScaling"; +constexpr OUStringLiteral lcl_aServiceName_Exponential = u"com.sun.star.chart2.ExponentialScaling"; +constexpr OUStringLiteral lcl_aServiceName_Linear = u"com.sun.star.chart2.LinearScaling"; +constexpr OUStringLiteral lcl_aServiceName_Power = u"com.sun.star.chart2.PowerScaling"; + +} + +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("Divide by zero exception"); + + 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("Divide by zero exception"); + + 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 ); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |