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Diffstat (limited to 'include/svx/EnhancedCustomShapeFunctionParser.hxx')
| -rw-r--r-- | include/svx/EnhancedCustomShapeFunctionParser.hxx | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/include/svx/EnhancedCustomShapeFunctionParser.hxx b/include/svx/EnhancedCustomShapeFunctionParser.hxx new file mode 100644 index 000000000000..28df983df61c --- /dev/null +++ b/include/svx/EnhancedCustomShapeFunctionParser.hxx @@ -0,0 +1,208 @@ +/* -*- 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 _ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX +#define _ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX + +#include <sal/config.h> +#include <boost/shared_ptr.hpp> +#include "EnhancedCustomShapeFunctionParser.hxx" +#include <com/sun/star/drawing/EnhancedCustomShapeParameter.hpp> +#include <com/sun/star/drawing/EnhancedCustomShapeParameterType.hpp> +#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 ExpressionFunct +{ + FUNC_CONST, + + ENUM_FUNC_PI, + ENUM_FUNC_LEFT, + ENUM_FUNC_TOP, + ENUM_FUNC_RIGHT, + ENUM_FUNC_BOTTOM, + ENUM_FUNC_XSTRETCH, + ENUM_FUNC_YSTRETCH, + ENUM_FUNC_HASSTROKE, + ENUM_FUNC_HASFILL, + ENUM_FUNC_WIDTH, + ENUM_FUNC_HEIGHT, + ENUM_FUNC_LOGWIDTH, + ENUM_FUNC_LOGHEIGHT, + ENUM_FUNC_ADJUSTMENT, + ENUM_FUNC_EQUATION, + + UNARY_FUNC_ABS, + UNARY_FUNC_SQRT, + UNARY_FUNC_SIN, + UNARY_FUNC_COS, + UNARY_FUNC_TAN, + UNARY_FUNC_ATAN, + UNARY_FUNC_NEG, + + BINARY_FUNC_PLUS, + BINARY_FUNC_MINUS, + BINARY_FUNC_MUL, + BINARY_FUNC_DIV, + BINARY_FUNC_MIN, + BINARY_FUNC_MAX, + BINARY_FUNC_ATAN2, + + TERNARY_FUNC_IF +}; + +#define EXPRESSION_FLAG_SUMANGLE_MODE 1 + +SVX_DLLPUBLIC void FillEquationParameter( const com::sun::star::drawing::EnhancedCustomShapeParameter&, const sal_Int32, EnhancedCustomShapeEquation& ); + +class 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 obtimizations, 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 com::sun::star::drawing::EnhancedCustomShapeParameter fillNode( + std::vector< EnhancedCustomShapeEquation >& rEquations, ExpressionNode* pOptionalArg, sal_uInt32 nFlags ) = 0; +}; +typedef ::boost::shared_ptr< ExpressionNode > ExpressionNodeSharedPtr; + +/** This exception is thrown, when the arithmetic expression + parser failed to parse a string. + */ +struct ParseError +{ + 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. + */ + + SVX_DLLPUBLIC static ExpressionNodeSharedPtr parseFunction( const OUString& rFunction, const EnhancedCustomShape2d& rCustoShape ); + +private: + // disabled constructor/destructor, since this is + // supposed to be a singleton + FunctionParser(); + + // default: disabled copy/assignment + FunctionParser(const FunctionParser&); + FunctionParser& operator=( const FunctionParser& ); +}; + +} + +#endif /* _ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX */ + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |