#ifndef TextParenthesis_h
#define TextParenthesis_h

/******************************************************************************
*
* Copyright (C) 2002 Hugo PEREIRA <mailto: hugo.pereira@free.fr>
*
* This is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This software 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 General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program.  If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/

#include "Counter.h"
#include "Debug.h"

#include <QDomElement>
#include <QDomDocument>
#include <QRegExp>
#include <QList>

//* text parenthesis (for highlighting)
class TextParenthesis final: private Base::Counter<TextParenthesis>
{

    public:

    //* typedef for list of patterns
    using List = QList<TextParenthesis>;

    //* constructor from DomElement
    explicit TextParenthesis( const QDomElement& element = QDomElement() );

    //* dom element
    QDomElement domElement( QDomDocument& parent ) const;

    //* block start
    const QString& first() const
    { return first_; }

    //* first
    void setFirst( const QString& value )
    { first_ = value; }

    //* block end
    const QString& second() const
    { return second_; }

    //* second
    void setSecond( const QString& value )
    { second_ = value; }

    //* regExp that match either block start or end
    const QRegExp& regexp() const
    { return regexp_; }

    //* regext
    void setRegexp( const QString& value )
    { regexp_.setPattern( value ); }

    //* used to find parenthesis for which first character match
    class MatchFTor
    {
        public:

        //* constructor
        explicit MatchFTor( const QString& text ):
            text_( text )
        {}

        //* predicate
        bool operator() ( const TextParenthesis& parenthesis ) const
        {
            return
                text_.left( parenthesis.first().size() ) == parenthesis.first() ||
                text_.left( parenthesis.second().size() ) == parenthesis.second();
        }

        private:

        //* predicted character
        const QString& text_;

    };

    //* used to find parenthesis for which first character match
    class FirstElementFTor
    {
        public:

        //* constructor
        explicit FirstElementFTor( const QString& text ):
            text_( text )
        {}

        //* predicate
        bool operator() ( const TextParenthesis& parenthesis ) const
        { return text_.right( parenthesis.first().size() ) == parenthesis.first(); }

        private:

        //* predicted character
        const QString& text_;

    };

    //* used to find parenthesis for which first character match
    class SecondElementFTor
    {
        public:

        //* constructor
        explicit SecondElementFTor( const QString& text ):
            text_( text )
        {}

        //* predicate
        bool operator() ( const TextParenthesis& parenthesis ) const
        { return text_.right( parenthesis.second().size() ) == parenthesis.second(); }

        private:

        //* predicted character
        const QString& text_;

    };

    private:

    //* regular expression that match first character
    QString first_;

    //* regular expression that match second character
    QString second_;

    //* regular expression that match either of both characters
    QRegExp regexp_;

    //* streamer
    friend QTextStream& operator << ( QTextStream& out, const TextParenthesis& parenthesis )
    {
        out << " first: " << parenthesis.first()
            << " second: " << parenthesis.second()
            << " regexp: " << parenthesis.regexp().pattern();
        return out;
    }

};

//* equal to operator
inline bool operator == ( const TextParenthesis& first, const TextParenthesis& second )
{
    return
        first.first() == second.first() &&
        first.second() == second.second() &&
        first.regexp() == second.regexp();
}

#endif