/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#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
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