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+/* -*- 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: */