Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 165 insertions, 0 deletions

diff --git a/chart2/source/tools/MovingAverageRegressionCurveCalculator.cxx b/chart2/source/tools/MovingAverageRegressionCurveCalculator.cxx
new file mode 100644
index 000000000..6726d9d78
--- /dev/null
+++ b/chart2/source/tools/MovingAverageRegressionCurveCalculator.cxx
@@ -0,0 +1,165 @@
+/* -*- 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 <MovingAverageRegressionCurveCalculator.hxx>
+#include <RegressionCalculationHelper.hxx>
+#include <ResId.hxx>
+#include <strings.hrc>
+
+#include <algorithm>
+#include <limits>
+
+#include <com/sun/star/chart2/MovingAverageType.hpp>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::chart2;
+
+namespace chart
+{
+
+MovingAverageRegressionCurveCalculator::MovingAverageRegressionCurveCalculator()
+{}
+
+MovingAverageRegressionCurveCalculator::~MovingAverageRegressionCurveCalculator()
+{}
+
+// ____ XRegressionCurveCalculator ____
+void SAL_CALL MovingAverageRegressionCurveCalculator::recalculateRegression(
+    const uno::Sequence< double >& aXValues,
+    const uno::Sequence< double >& aYValues )
+{
+    m_fCorrelationCoefficient = std::numeric_limits<double>::quiet_NaN();
+
+    RegressionCalculationHelper::tDoubleVectorPair aValues(
+        RegressionCalculationHelper::cleanup(
+            aXValues, aYValues,
+            RegressionCalculationHelper::isValid()));
+
+    aYList.clear();
+    aXList.clear();
+
+    // For formulas, see
+    // https://docs.oasis-open.org/office/OpenDocument/v1.3/cs02/part3-schema/OpenDocument-v1.3-cs02-part3-schema.html#property-chart_regression-moving-type
+
+    switch (mnMovingType)
+    {
+        case MovingAverageType::Central:
+        {
+
+            calculateValuesCentral(std::move(aValues));
+            break;
+        }
+
+        case MovingAverageType::AveragedAbscissa:
+        {
+            calculateValues(std::move(aValues), true);
+            break;
+        }
+        case MovingAverageType::Prior:
+        default:
+        {
+            calculateValues(std::move(aValues), false);
+            break;
+        }
+    }
+}
+
+void MovingAverageRegressionCurveCalculator::calculateValuesCentral(
+    RegressionCalculationHelper::tDoubleVectorPair aValues)
+{
+    const size_t aSize = aValues.first.size();
+    if (aSize == 0)
+        return;
+    for (size_t i = mPeriod - 1; i < aSize; ++i)
+    {
+        double yAvg = 0.0;
+
+        for (sal_Int32 j = 0; j < mPeriod; j++)
+        {
+            yAvg += aValues.second[i - j];
+        }
+        yAvg /= mPeriod;
+        aYList.push_back(yAvg);
+    }
+    sal_Int32 nPeriodLocal = (mPeriod % 2 == 0) ? (mPeriod / 2) : ((mPeriod - 1) / 2);
+    for (size_t i = nPeriodLocal; i < aSize - 1; ++i)
+    {
+        double x = aValues.first[i];
+        aXList.push_back(x);
+    }
+}
+
+void MovingAverageRegressionCurveCalculator::calculateValues(
+    RegressionCalculationHelper::tDoubleVectorPair aValues, bool bUseXAvg)
+{
+    const size_t aSize = aValues.first.size();
+    for (size_t i = mPeriod - 1; i < aSize; ++i)
+    {
+        double xAvg = 0.0;
+        double yAvg = 0.0;
+
+        for (sal_Int32 j = 0; j < mPeriod; j++)
+        {
+            xAvg += aValues.first[i - j];
+            yAvg += aValues.second[i - j];
+        }
+        yAvg /= mPeriod;
+        xAvg /= mPeriod;
+
+        aYList.push_back(yAvg);
+        if (bUseXAvg)
+        {
+            aXList.push_back(xAvg);
+        }
+        else
+        {
+            double x = aValues.first[i];
+            aXList.push_back(x);
+        }
+    }
+}
+
+double SAL_CALL MovingAverageRegressionCurveCalculator::getCurveValue( double /*x*/ )
+{
+    return std::numeric_limits<double>::quiet_NaN();
+}
+
+uno::Sequence< geometry::RealPoint2D > SAL_CALL MovingAverageRegressionCurveCalculator::getCurveValues(
+    double /*min*/, double /*max*/, sal_Int32 /*nPointCount*/,
+    const uno::Reference< chart2::XScaling >& /*xScalingX*/,
+    const uno::Reference< chart2::XScaling >& /*xScalingY*/,
+    sal_Bool /*bMaySkipPointsInCalculation*/ )
+{
+    size_t nSize = std::min(aXList.size(), aYList.size());
+    uno::Sequence< geometry::RealPoint2D > aResult( nSize );
+    std::transform(aXList.begin(), aXList.begin() + nSize, aYList.begin(), aResult.getArray(),
+                   [](const auto& x, const auto& y) { return geometry::RealPoint2D(x, y); });
+    return aResult;
+}
+
+OUString MovingAverageRegressionCurveCalculator::ImplGetRepresentation(
+    const uno::Reference< util::XNumberFormatter >& /*xNumFormatter*/,
+    sal_Int32 /*nNumberFormatKey*/, sal_Int32* /*pFormulaLength = nullptr */ ) const
+{
+    return SchResId( STR_OBJECT_MOVING_AVERAGE_WITH_PARAMETERS );
+}
+
+} //  namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */