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/*
Copyright (c) 2006 Gábor Lehel <illissius@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef AMAROK_EXPRESSION_H
#define AMAROK_EXPRESSION_H
#include <tqstring.h>
#include <tqvaluevector.h>
struct expression_element
{
TQString field;
TQString text;
bool negate: 1;
enum { Contains, Less, More } match: 2;
expression_element(): negate( false ), match( Contains ) { }
};
typedef TQValueVector<expression_element> or_list;
typedef TQValueVector<or_list> ParsedExpression;
class ExpressionParser
{
public:
ExpressionParser( const TQString &expression );
ParsedExpression parse();
static ParsedExpression parse( const TQString &expression );
static bool isAdvancedExpression( const TQString &expression );
private:
void parseChar( const TQChar &c );
void handleSpace( const TQChar &c );
void handleMinus( const TQChar &c );
void handleColon( const TQChar &c );
void handleMod( const TQChar &c );
void handleQuote( const TQChar &c );
void handleChar( const TQChar &c );
void finishedToken();
void finishedElement();
void finishedOrGroup();
const TQString &m_expression;
enum State { ExpectMinus, ExpectField, ExpectMod, ExpectText };
int m_state;
bool m_haveGroup;
bool m_inQuote;
bool m_inOrGroup;
TQString m_string;
expression_element m_element;
or_list m_or;
ParsedExpression m_parsed;
};
#endif
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