1 files changed, 277 insertions, 0 deletions
diff --git a/chart2/source/tools/Scaling.cxx b/chart2/source/tools/Scaling.cxx
new file mode 100644
index 000000000..82ce8149b
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+++ b/chart2/source/tools/Scaling.cxx
@@ -0,0 +1,277 @@
+/* -*- 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 <rtl/math.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <cppuhelper/supportsservice.hxx>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace
+{
+
+static const char lcl_aServiceName_Logarithmic[] = "com.sun.star.chart2.LogarithmicScaling";
+static const char lcl_aServiceName_Exponential[] = "com.sun.star.chart2.ExponentialScaling";
+static const char lcl_aServiceName_Linear[] = "com.sun.star.chart2.LinearScaling";
+static const char lcl_aServiceName_Power[] = "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 )
+{
+    double fResult;
+    if( std::isnan( value ) || std::isinf( value ) )
+        ::rtl::math::setNan( & fResult );
+    else
+        fResult = log( value ) / m_fLogOfBase;
+    return fResult;
+}
+
+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 )
+{
+    double fResult;
+    if( std::isnan( value ) || std::isinf( value ) )
+        ::rtl::math::setNan( & fResult );
+    else
+        fResult = pow( m_fBase, value );
+    return fResult;
+}
+
+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 )
+{
+    double fResult;
+    if( std::isnan( value ) || std::isinf( value ) )
+        ::rtl::math::setNan( & fResult );
+    else
+        fResult = m_fOffset + m_fSlope * value;
+    return fResult;
+}
+
+uno::Reference< XScaling > SAL_CALL
+    LinearScaling::getInverseScaling()
+{
+    // ToDo: ApproxEqual ?
+    if( m_fSlope == 0 )
+        throw uno::RuntimeException();
+
+    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 )
+{
+    double fResult;
+    if( std::isnan( value ) || std::isinf( value ) )
+        ::rtl::math::setNan( & fResult );
+    else
+        fResult = pow( value, m_fExponent );
+    return fResult;
+}
+
+uno::Reference< XScaling > SAL_CALL
+    PowerScaling::getInverseScaling()
+{
+    // ToDo: ApproxEqual ?
+    if( m_fExponent == 0 )
+        throw uno::RuntimeException();
+
+    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: */