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/*
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Copyright (c) 2006 Gábor Lehel <illissius@gmail.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef AMAROK_EXPRESSION_H
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#define AMAROK_EXPRESSION_H
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#include <tqstring.h>
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#include <tqvaluevector.h>
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struct expression_element
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{
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TQString field;
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TQString text;
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bool negate: 1;
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enum { Contains, Less, More } match: 2;
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expression_element(): negate( false ), match( Contains ) { }
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};
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typedef TQValueVector<expression_element> or_list;
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typedef TQValueVector<or_list> ParsedExpression;
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class ExpressionParser
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{
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public:
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ExpressionParser( const TQString &expression );
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ParsedExpression parse();
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static ParsedExpression parse( const TQString &expression );
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static bool isAdvancedExpression( const TQString &expression );
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private:
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void parseChar( const TQChar &c );
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void handleSpace( const TQChar &c );
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void handleMinus( const TQChar &c );
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void handleColon( const TQChar &c );
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void handleMod( const TQChar &c );
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void handleQuote( const TQChar &c );
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void handleChar( const TQChar &c );
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void finishedToken();
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void finishedElement();
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void finishedOrGroup();
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const TQString &m_expression;
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enum State { ExpectMinus, ExpectField, ExpectMod, ExpectText };
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int m_state;
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bool m_haveGroup;
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bool m_inQuote;
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bool m_inOrGroup;
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TQString m_string;
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expression_element m_element;
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or_list m_or;
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ParsedExpression m_parsed;
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};
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#endif
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