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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: EnhancedCustomShapeFunctionParser.hxx,v $
*
* $Revision: 1.3 $
*
* last change: $Author: obo $ $Date: 2006-10-12 11:38:21 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#ifndef _ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX
#define _ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX
#ifndef _SAL_CONFIG_H_
#include <sal/config.h>
#endif
#ifndef BOOST_SHARED_PTR_HPP_INCLUDED
#include <boost/shared_ptr.hpp>
#endif
#ifndef _ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX
#include "EnhancedCustomShapeFunctionParser.hxx"
#endif
#ifndef _COM_SUN_STAR_DRAWING_ENHANCEDCUSTOMSHAPEPARAMETER_HPP_
#include <com/sun/star/drawing/EnhancedCustomShapeParameter.hpp>
#endif
#ifndef _COM_SUN_STAR_DRAWING_ENHANCEDCUSTOMSHAPEPARAMETERTYPE_HPP_
#include <com/sun/star/drawing/EnhancedCustomShapeParameterType.hpp>
#endif
#include <vector>
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
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.
*/
static ExpressionNodeSharedPtr parseFunction( const ::rtl::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 */
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