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, 239 insertions, 0 deletions

diff --git a/slideshow/source/engine/expressionnodefactory.cxx b/slideshow/source/engine/expressionnodefactory.cxx
new file mode 100644
index 000000000..0b4136f34
--- /dev/null
+++ b/slideshow/source/engine/expressionnodefactory.cxx
@@ -0,0 +1,239 @@
+/* -*- 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 <expressionnodefactory.hxx>
+
+#include <algorithm>
+
+
+/* Implementation of ExpressionNodeFactory class */
+
+namespace slideshow::internal
+{
+        namespace
+        {
+            class ConstantValueExpression : public ExpressionNode
+            {
+            public:
+                explicit ConstantValueExpression( double rValue ) :
+                    maValue( rValue )
+                {
+                }
+
+                virtual double operator()( double /*t*/ ) const override
+                {
+                    return maValue;
+                }
+
+                virtual bool isConstant() const override
+                {
+                    return true;
+                }
+
+            private:
+                double  maValue;
+            };
+
+            class TValueExpression : public ExpressionNode
+            {
+            public:
+                TValueExpression()
+                {
+                }
+
+                virtual double operator()( double t ) const override
+                {
+                    return t;
+                }
+
+                virtual bool isConstant() const override
+                {
+                    return false;
+                }
+            };
+
+            /** Base class for following binary functions (*+-/)
+
+                Does not pay off to have all this as a template, since
+                we'd have to hold the functor as a member (+33% object
+                size).
+             */
+            class BinaryExpressionBase : public ExpressionNode
+            {
+            public:
+                BinaryExpressionBase( const std::shared_ptr<ExpressionNode>&    rFirstArg,
+                                      const std::shared_ptr<ExpressionNode>&    rSecondArg ) :
+                    mpFirstArg( rFirstArg ),
+                    mpSecondArg( rSecondArg )
+                {
+                }
+
+                virtual bool isConstant() const override
+                {
+                    return
+                        mpFirstArg->isConstant() &&
+                        mpSecondArg->isConstant();
+                }
+
+            protected:
+                std::shared_ptr<ExpressionNode> mpFirstArg;
+                std::shared_ptr<ExpressionNode> mpSecondArg;
+            };
+
+            class PlusExpression : public BinaryExpressionBase
+            {
+            public:
+                PlusExpression( const std::shared_ptr<ExpressionNode>&  rFirstArg,
+                                const std::shared_ptr<ExpressionNode>&  rSecondArg ) :
+                    BinaryExpressionBase( rFirstArg, rSecondArg )
+                {
+                }
+
+                virtual double operator()( double t ) const override
+                {
+                    return (*mpFirstArg)(t) + (*mpSecondArg)(t);
+                }
+            };
+
+            class MinusExpression : public BinaryExpressionBase
+            {
+            public:
+                MinusExpression( const std::shared_ptr<ExpressionNode>& rFirstArg,
+                                 const std::shared_ptr<ExpressionNode>& rSecondArg ) :
+                    BinaryExpressionBase( rFirstArg, rSecondArg )
+                {
+                }
+
+                virtual double operator()( double t ) const override
+                {
+                    return (*mpFirstArg)(t) - (*mpSecondArg)(t);
+                }
+            };
+
+            class MultipliesExpression : public BinaryExpressionBase
+            {
+            public:
+                MultipliesExpression( const std::shared_ptr<ExpressionNode>&    rFirstArg,
+                                      const std::shared_ptr<ExpressionNode>&    rSecondArg ) :
+                    BinaryExpressionBase( rFirstArg, rSecondArg )
+                {
+                }
+
+                virtual double operator()( double t ) const override
+                {
+                    return (*mpFirstArg)(t) * (*mpSecondArg)(t);
+                }
+            };
+
+            class DividesExpression : public BinaryExpressionBase
+            {
+            public:
+                DividesExpression( const std::shared_ptr<ExpressionNode>&   rFirstArg,
+                                   const std::shared_ptr<ExpressionNode>&   rSecondArg ) :
+                    BinaryExpressionBase( rFirstArg, rSecondArg )
+                {
+                }
+
+                virtual double operator()( double t ) const override
+                {
+                    return (*mpFirstArg)(t) / (*mpSecondArg)(t);
+                }
+            };
+
+            class MinExpression : public BinaryExpressionBase
+            {
+            public:
+                MinExpression( const std::shared_ptr<ExpressionNode>&   rFirstArg,
+                               const std::shared_ptr<ExpressionNode>&   rSecondArg ) :
+                    BinaryExpressionBase( rFirstArg, rSecondArg )
+                {
+                }
+
+                virtual double operator()( double t ) const override
+                {
+                    return ::std::min( (*mpFirstArg)(t), (*mpSecondArg)(t) );
+                }
+            };
+
+            class MaxExpression : public BinaryExpressionBase
+            {
+            public:
+                MaxExpression( const std::shared_ptr<ExpressionNode>&   rFirstArg,
+                               const std::shared_ptr<ExpressionNode>&   rSecondArg ) :
+                    BinaryExpressionBase( rFirstArg, rSecondArg )
+                {
+                }
+
+                virtual double operator()( double t ) const override
+                {
+                    return ::std::max( (*mpFirstArg)(t), (*mpSecondArg)(t) );
+                }
+            };
+        }
+
+        std::shared_ptr<ExpressionNode> ExpressionNodeFactory::createConstantValueExpression( double rConstantValue )
+        {
+            return std::make_shared<ConstantValueExpression>(rConstantValue);
+        }
+
+        std::shared_ptr<ExpressionNode> ExpressionNodeFactory::createValueTExpression()
+        {
+            return std::make_shared<TValueExpression>();
+        }
+
+        std::shared_ptr<ExpressionNode> ExpressionNodeFactory::createPlusExpression( const std::shared_ptr<ExpressionNode>& rLHS,
+                                                                             const std::shared_ptr<ExpressionNode>& rRHS )
+        {
+            return std::make_shared<PlusExpression>(rLHS, rRHS);
+        }
+
+        std::shared_ptr<ExpressionNode> ExpressionNodeFactory::createMinusExpression( const std::shared_ptr<ExpressionNode>&    rLHS,
+                                                                              const std::shared_ptr<ExpressionNode>&    rRHS )
+        {
+            return std::make_shared<MinusExpression>(rLHS, rRHS);
+        }
+
+        std::shared_ptr<ExpressionNode> ExpressionNodeFactory::createMultipliesExpression( const std::shared_ptr<ExpressionNode>&   rLHS,
+                                                                                   const std::shared_ptr<ExpressionNode>&   rRHS )
+        {
+            return std::make_shared<MultipliesExpression>(rLHS, rRHS);
+        }
+
+        std::shared_ptr<ExpressionNode> ExpressionNodeFactory::createDividesExpression( const std::shared_ptr<ExpressionNode>&  rLHS,
+                                                                                const std::shared_ptr<ExpressionNode>&  rRHS )
+        {
+            return std::make_shared<DividesExpression>(rLHS, rRHS);
+        }
+
+        std::shared_ptr<ExpressionNode> ExpressionNodeFactory::createMinExpression   ( const std::shared_ptr<ExpressionNode>&   rOuterFunction,
+                                                                               const std::shared_ptr<ExpressionNode>&   rInnerFunction )
+        {
+            return std::make_shared<MinExpression>(rOuterFunction, rInnerFunction);
+        }
+
+        std::shared_ptr<ExpressionNode> ExpressionNodeFactory::createMaxExpression   ( const std::shared_ptr<ExpressionNode>&   rOuterFunction,
+                                                                               const std::shared_ptr<ExpressionNode>&   rInnerFunction )
+        {
+            return std::make_shared<MaxExpression>(rOuterFunction, rInnerFunction);
+        }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */