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| -rw-r--r-- | include/svx/EnhancedCustomShapeFunctionParser.hxx | 249 |
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diff --git a/include/svx/EnhancedCustomShapeFunctionParser.hxx b/include/svx/EnhancedCustomShapeFunctionParser.hxx new file mode 100644 index 000000000..28d2491c7 --- /dev/null +++ b/include/svx/EnhancedCustomShapeFunctionParser.hxx @@ -0,0 +1,249 @@ +/* -*- 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 . + */ + +#ifndef INCLUDED_SVX_ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX +#define INCLUDED_SVX_ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX + +#include <config_options.h> +#include <sal/config.h> +#include <com/sun/star/drawing/EnhancedCustomShapeParameter.hpp> +#include <memory> +#include <ostream> +#include <string_view> +#include <vector> + +#include <svx/svxdllapi.h> + +struct EnhancedCustomShapeEquation +{ + sal_Int32 nOperation; + sal_Int32 nPara[ 3 ]; + + EnhancedCustomShapeEquation() : + nOperation ( 0 ) + { + nPara[ 0 ] = nPara[ 1 ] = nPara[ 2 ] = 0; + } +}; + +class EnhancedCustomShape2d; + +namespace EnhancedCustomShape { + +enum class ExpressionFunct +{ + Const, + + EnumPi, + EnumLeft, + EnumTop, + EnumRight, + EnumBottom, + EnumXStretch, + EnumYStretch, + EnumHasStroke, + EnumHasFill, + EnumWidth, + EnumHeight, + EnumLogWidth, + EnumLogHeight, + EnumAdjustment, + EnumEquation, + + UnaryAbs, + UnarySqrt, + UnarySin, + UnaryCos, + UnaryTan, + UnaryAtan, + UnaryNeg, + + BinaryPlus, + BinaryMinus, + BinaryMul, + BinaryDiv, + BinaryMin, + BinaryMax, + BinaryAtan2, + + TernaryIf +}; + +template< typename charT, typename traits > +inline std::basic_ostream<charT, traits> & operator <<( + std::basic_ostream<charT, traits> & stream, const ExpressionFunct& eFunc ) +{ + switch (eFunc) + { + case ExpressionFunct::Const : return stream << "const"; + + case ExpressionFunct::EnumPi : return stream << "pi"; + case ExpressionFunct::EnumLeft : return stream << "left"; + case ExpressionFunct::EnumTop : return stream << "top"; + case ExpressionFunct::EnumRight : return stream << "right"; + case ExpressionFunct::EnumBottom : return stream << "bottom"; + case ExpressionFunct::EnumXStretch : return stream << "xstretch"; + case ExpressionFunct::EnumYStretch : return stream << "ystretch"; + case ExpressionFunct::EnumHasStroke : return stream << "hasstroke"; + case ExpressionFunct::EnumHasFill : return stream << "hasfill"; + case ExpressionFunct::EnumWidth : return stream << "width"; + case ExpressionFunct::EnumHeight : return stream << "height"; + case ExpressionFunct::EnumLogWidth : return stream << "logwidth"; + case ExpressionFunct::EnumLogHeight : return stream << "logheight"; + case ExpressionFunct::EnumAdjustment : return stream << "adjustment"; + case ExpressionFunct::EnumEquation : return stream << "equation"; + + case ExpressionFunct::UnaryAbs : return stream << "abs"; + case ExpressionFunct::UnarySqrt : return stream << "sqrt"; + case ExpressionFunct::UnarySin : return stream << "sin"; + case ExpressionFunct::UnaryCos : return stream << "cos"; + case ExpressionFunct::UnaryTan : return stream << "tan"; + case ExpressionFunct::UnaryAtan : return stream << "atan"; + case ExpressionFunct::UnaryNeg : return stream << "neg"; + + case ExpressionFunct::BinaryPlus : return stream << "plus"; + case ExpressionFunct::BinaryMinus : return stream << "minus"; + case ExpressionFunct::BinaryMul : return stream << "mul"; + case ExpressionFunct::BinaryDiv : return stream << "div"; + case ExpressionFunct::BinaryMin : return stream << "min"; + case ExpressionFunct::BinaryMax : return stream << "max"; + case ExpressionFunct::BinaryAtan2 : return stream << "atan2"; + + case ExpressionFunct::TernaryIf : return stream << "if"; + + default: return stream << "?(" << static_cast<int>(eFunc) << ")"; + } +} + +#define EXPRESSION_FLAG_SUMANGLE_MODE 1 + +SVXCORE_DLLPUBLIC void FillEquationParameter( const css::drawing::EnhancedCustomShapeParameter&, const sal_Int32, EnhancedCustomShapeEquation& ); + +class SAL_DLLPUBLIC_RTTI ExpressionNode +{ +public: + virtual ~ExpressionNode(); + + /** Predicate whether this node is constant. + + This predicate returns true, if this node is + neither time- nor ViewInfo dependent. This allows + for certain optimizations, i.e. not the full + expression tree needs be represented by + ExpressionNodes. + + @returns true, if the note is constant + */ + virtual bool isConstant() const = 0; + + /** Operator to calculate function value. + + This method calculates the function value. + */ + virtual double operator()() const = 0; + + /** Operator to retrieve the type of expression node + */ + virtual ExpressionFunct getType() const = 0; + + /** Operator to retrieve the ms version of expression + */ + virtual css::drawing::EnhancedCustomShapeParameter fillNode( + std::vector< EnhancedCustomShapeEquation >& rEquations, ExpressionNode* pOptionalArg, sal_uInt32 nFlags ) = 0; +}; + +/** This exception is thrown, when the arithmetic expression + parser failed to parse a string. + */ +struct ParseError +{ + ParseError( const char* ) {} +}; + +class FunctionParser +{ +public: + + /** Parse a string + + The following grammar is accepted by this method: + <code> + + number_digit = '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9' + + number = number number_digit | number_digit + + identifier = 'pi'|'left'|'top'|'right'|'bottom'|'xstretch'|'ystretch'| + 'hasstroke'|'hasfill'|'width'|'height'|'logwidth'|'logheight' + + unary_function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan' + binary_function = 'min'|'max'|'atan2' + ternary_function = 'if' + + function_reference = '?' 'a-z,A-Z,0-9' ' ' + modifier_reference = '$' '0-9' ' ' + + basic_expression = + number | + identifier | + function_reference | + unary_function '(' additive_expression ')' | + binary_function '(' additive_expression ',' additive_expression ')' | + ternary_function '(' additive_expression ',' additive_expression ', + ' additive_expression ')' | '(' additive_expression ')' + + unary_expression = '-' basic_expression + + multiplicative_expression = + basic_expression | + multiplicative_expression '*' basic_expression | + multiplicative_expression '/' basic_expression + + additive_expression = + multiplicative_expression | + additive_expression '+' multiplicative_expression | + additive_expression '-' multiplicative_expression + + </code> + + @param rFunction + The string to parse + + @param rCustoShape + The CustomShape is required for calculation of dynamic values such + "hasstroke", function references and or modifier references ... + + @throws ParseError if an invalid expression is given. + + @return the generated function object. + */ + + UNLESS_MERGELIBS(SVXCORE_DLLPUBLIC) static std::shared_ptr<ExpressionNode> const & parseFunction( std::u16string_view rFunction, const EnhancedCustomShape2d& rCustoShape ); + + // this is a singleton + FunctionParser() = delete; + FunctionParser(const FunctionParser&) = delete; + FunctionParser& operator=( const FunctionParser& ) = delete; +}; + +} + +#endif // INCLUDED_SVX_ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |