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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 .
*/
#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: */
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