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Diffstat (limited to 'slideshow/source/engine/expressionnodefactory.cxx')
| -rw-r--r-- | slideshow/source/engine/expressionnodefactory.cxx | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/slideshow/source/engine/expressionnodefactory.cxx b/slideshow/source/engine/expressionnodefactory.cxx new file mode 100644 index 000000000000..f766eafdfabc --- /dev/null +++ b/slideshow/source/engine/expressionnodefactory.cxx @@ -0,0 +1,282 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_slideshow.hxx" + +// must be first +#include <canvas/debug.hxx> +#include <expressionnodefactory.hxx> + +#include <canvas/verbosetrace.hxx> + +#include <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/point/b2dpoint.hxx> + +#include <functional> +#include <algorithm> + + +/* Implementation of ExpressionNodeFactory class */ + +namespace slideshow +{ + namespace internal + { + namespace + { + class ConstantValueExpression : public ExpressionNode + { + public: + ConstantValueExpression( double rValue ) : + maValue( rValue ) + { + } + + virtual double operator()( double /*t*/ ) const + { + return maValue; + } + + virtual bool isConstant() const + { + return true; + } + + private: + double maValue; + }; + + class TValueExpression : public ExpressionNode + { + public: + TValueExpression() + { + } + + virtual double operator()( double t ) const + { + return t; + } + + virtual bool isConstant() const + { + 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 ExpressionNodeSharedPtr& rFirstArg, + const ExpressionNodeSharedPtr& rSecondArg ) : + mpFirstArg( rFirstArg ), + mpSecondArg( rSecondArg ) + { + } + + virtual bool isConstant() const + { + return + mpFirstArg->isConstant() && + mpSecondArg->isConstant(); + } + + protected: + ExpressionNodeSharedPtr mpFirstArg; + ExpressionNodeSharedPtr mpSecondArg; + }; + + class PlusExpression : public BinaryExpressionBase + { + public: + PlusExpression( const ExpressionNodeSharedPtr& rFirstArg, + const ExpressionNodeSharedPtr& rSecondArg ) : + BinaryExpressionBase( rFirstArg, rSecondArg ) + { + } + + virtual double operator()( double t ) const + { + return (*mpFirstArg)(t) + (*mpSecondArg)(t); + } + }; + + class MinusExpression : public BinaryExpressionBase + { + public: + MinusExpression( const ExpressionNodeSharedPtr& rFirstArg, + const ExpressionNodeSharedPtr& rSecondArg ) : + BinaryExpressionBase( rFirstArg, rSecondArg ) + { + } + + virtual double operator()( double t ) const + { + return (*mpFirstArg)(t) - (*mpSecondArg)(t); + } + }; + + class MultipliesExpression : public BinaryExpressionBase + { + public: + MultipliesExpression( const ExpressionNodeSharedPtr& rFirstArg, + const ExpressionNodeSharedPtr& rSecondArg ) : + BinaryExpressionBase( rFirstArg, rSecondArg ) + { + } + + virtual double operator()( double t ) const + { + return (*mpFirstArg)(t) * (*mpSecondArg)(t); + } + }; + + class DividesExpression : public BinaryExpressionBase + { + public: + DividesExpression( const ExpressionNodeSharedPtr& rFirstArg, + const ExpressionNodeSharedPtr& rSecondArg ) : + BinaryExpressionBase( rFirstArg, rSecondArg ) + { + } + + virtual double operator()( double t ) const + { + return (*mpFirstArg)(t) / (*mpSecondArg)(t); + } + }; + + class ComposedExpression : public BinaryExpressionBase + { + public: + ComposedExpression( const ExpressionNodeSharedPtr& rFirstArg, + const ExpressionNodeSharedPtr& rSecondArg ) : + BinaryExpressionBase( rFirstArg, rSecondArg ) + { + } + + virtual double operator()( double t ) const + { + return (*mpFirstArg)( (*mpSecondArg)(t) ); + } + }; + + class MinExpression : public BinaryExpressionBase + { + public: + MinExpression( const ExpressionNodeSharedPtr& rFirstArg, + const ExpressionNodeSharedPtr& rSecondArg ) : + BinaryExpressionBase( rFirstArg, rSecondArg ) + { + } + + virtual double operator()( double t ) const + { + return ::std::min( (*mpFirstArg)(t), (*mpSecondArg)(t) ); + } + }; + + class MaxExpression : public BinaryExpressionBase + { + public: + MaxExpression( const ExpressionNodeSharedPtr& rFirstArg, + const ExpressionNodeSharedPtr& rSecondArg ) : + BinaryExpressionBase( rFirstArg, rSecondArg ) + { + } + + virtual double operator()( double t ) const + { + return ::std::max( (*mpFirstArg)(t), (*mpSecondArg)(t) ); + } + }; + } + + ExpressionNodeSharedPtr ExpressionNodeFactory::createConstantValueExpression( double rConstantValue ) + { + return ExpressionNodeSharedPtr( new ConstantValueExpression(rConstantValue) ); + } + + ExpressionNodeSharedPtr ExpressionNodeFactory::createValueTExpression() + { + return ExpressionNodeSharedPtr( new TValueExpression() ); + } + + ExpressionNodeSharedPtr ExpressionNodeFactory::createPlusExpression( const ExpressionNodeSharedPtr& rLHS, + const ExpressionNodeSharedPtr& rRHS ) + { + return ExpressionNodeSharedPtr( new PlusExpression(rLHS, rRHS) ); + } + + ExpressionNodeSharedPtr ExpressionNodeFactory::createMinusExpression( const ExpressionNodeSharedPtr& rLHS, + const ExpressionNodeSharedPtr& rRHS ) + { + return ExpressionNodeSharedPtr( new MinusExpression(rLHS, rRHS) ); + } + + ExpressionNodeSharedPtr ExpressionNodeFactory::createMultipliesExpression( const ExpressionNodeSharedPtr& rLHS, + const ExpressionNodeSharedPtr& rRHS ) + { + return ExpressionNodeSharedPtr( new MultipliesExpression(rLHS, rRHS) ); + } + + ExpressionNodeSharedPtr ExpressionNodeFactory::createDividesExpression( const ExpressionNodeSharedPtr& rLHS, + const ExpressionNodeSharedPtr& rRHS ) + { + return ExpressionNodeSharedPtr( new DividesExpression(rLHS, rRHS) ); + } + + ExpressionNodeSharedPtr ExpressionNodeFactory::createComposedExpression ( const ExpressionNodeSharedPtr& rOuterFunction, + const ExpressionNodeSharedPtr& rInnerFunction ) + { + return ExpressionNodeSharedPtr( new ComposedExpression(rOuterFunction, rInnerFunction) ); + } + + ExpressionNodeSharedPtr ExpressionNodeFactory::createMinExpression ( const ExpressionNodeSharedPtr& rOuterFunction, + const ExpressionNodeSharedPtr& rInnerFunction ) + { + return ExpressionNodeSharedPtr( new MinExpression(rOuterFunction, rInnerFunction) ); + } + + ExpressionNodeSharedPtr ExpressionNodeFactory::createMaxExpression ( const ExpressionNodeSharedPtr& rOuterFunction, + const ExpressionNodeSharedPtr& rInnerFunction ) + { + return ExpressionNodeSharedPtr( new MaxExpression(rOuterFunction, rInnerFunction) ); + } + + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |