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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 <sal/config.h>
#include <boost/shared_ptr.hpp>
#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 // INCLUDED_SVX_ENHANCEDCUSTOMSHAPEFUNCTIONPARSER_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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