/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the tools applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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/*+
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  openedlist.cpp+
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*/+
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+
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#include <qregexp.h>+
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+
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#include "atom.h"+
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#include "openedlist.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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static const char roman[] = "m\2d\5c\2l\5x\2v\5i";+
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+
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OpenedList::OpenedList( Style style )+
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    : sty( style ), ini( 1 ), nex( 0 )+
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{+
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}+
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+
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OpenedList::OpenedList( const Location& location, const QString& hint )+
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    : sty( Bullet ), ini( 1 )+
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{+
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    QRegExp hintSyntax( "(\\W*)([0-9]+|[A-Z]+|[a-z]+)(\\W*)" );+
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+
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    if ( hintSyntax.exactMatch(hint) ) {+
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	bool ok;+
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	int asNumeric = hint.toInt( &ok );+
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	int asRoman = fromRoman( hintSyntax.cap(2) );+
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	int asAlpha = fromAlpha( hintSyntax.cap(2) );+
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+
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	if ( ok ) {+
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            sty = Numeric;+
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	    ini = asNumeric;+
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	} else if ( asRoman > 0 && asRoman != 100 && asRoman != 500 ) {+
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	    sty = ( hint == hint.toLower() ) ? LowerRoman : UpperRoman;+
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	    ini = asRoman;+
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	} else {+
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	    sty = ( hint == hint.toLower() ) ? LowerAlpha : UpperAlpha;+
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	    ini = asAlpha;+
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	}+
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	pref = hintSyntax.cap( 1 );+
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	suff = hintSyntax.cap( 3 );+
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    } else if ( !hint.isEmpty() ) {+
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	location.warning( tr("Unrecognized list style '%1'").arg(hint) );+
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    }+
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    nex = ini - 1;+
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}+
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+
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QString OpenedList::styleString() const+
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{+
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    switch ( style() ) {+
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    case Bullet:+
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    default:+
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	return ATOM_LIST_BULLET;+
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    case Tag:+
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	return ATOM_LIST_TAG;+
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    case Value:+
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	return ATOM_LIST_VALUE;+
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    case Numeric:+
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	return ATOM_LIST_NUMERIC;+
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    case UpperAlpha:+
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	return ATOM_LIST_UPPERALPHA;+
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    case LowerAlpha:+
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	return ATOM_LIST_LOWERALPHA;+
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    case UpperRoman:+
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	return ATOM_LIST_UPPERROMAN;+
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    case LowerRoman:+
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	return ATOM_LIST_LOWERROMAN;+
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    }+
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}+
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+
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QString OpenedList::numberString() const+
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{+
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    return QString::number( number() );+
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/*+
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    switch ( style() ) {+
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    case Numeric:+
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	return QString::number( number() );+
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    case UpperAlpha:+
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	return toAlpha( number() ).toUpper();+
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    case LowerAlpha:+
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	return toAlpha( number() );+
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    case UpperRoman:+
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	return toRoman( number() ).toUpper();+
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    case LowerRoman:+
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	return toRoman( number() );+
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    case Bullet:+
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    default:+
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	return "*";+
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    }*/+
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}+
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+
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QString OpenedList::toAlpha( int n )+
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{+
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    QString str;+
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+
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    while ( n > 0 ) {+
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	n--;+
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	str.prepend( (n % 26) + 'a' );+
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	n /= 26;+
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    }+
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    return str;+
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}+
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+
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int OpenedList::fromAlpha( const QString& str )+
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{+
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    int n = 0;+
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    int u;+
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+
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    for ( int i = 0; i < (int) str.length(); i++ ) {+
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	u = str[i].toLower().unicode();+
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	if ( u >= 'a' && u <= 'z' ) {+
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	    n *= 26;+
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	    n += u - 'a' + 1;+
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	} else {+
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	    return 0;+
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	}+
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    }+
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    return n;+
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}+
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+
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QString OpenedList::toRoman( int n )+
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{+
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    /*+
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      See p. 30 of Donald E. Knuth's "TeX: The Program".+
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    */+
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    QString str;+
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    int j = 0;+
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    int k;+
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    int u;+
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    int v = 1000;+
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+
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    for ( ;; ) {+
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	while ( n >= v ) {+
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	    str += roman[j];+
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	    n -= v;+
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	}+
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+
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	if ( n <= 0 )+
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	    break;+
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+
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	k = j + 2;+
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	u = v / roman[k - 1];+
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	if ( roman[k - 1] == 2 ) {+
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	    k += 2;+
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	    u /= 5;+
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	}+
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	if ( n + u >= v ) {+
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	    str += roman[k];+
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	    n += u;+
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	} else {+
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	    j += 2;+
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	    v /= roman[j - 1];+
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	}+
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    }+
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    return str;+
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}+
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+
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int OpenedList::fromRoman( const QString& str )+
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{+
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    int n = 0;+
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    int j;+
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    int u;+
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    int v = 0;+
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+
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    for ( int i = str.length() - 1; i >= 0; i-- ) {+
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	j = 0;+
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	u = 1000;+
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	while ( roman[j] != 'i' && roman[j] != str[i].toLower() ) {+
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	    j += 2;+
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	    u /= roman[j - 1];+
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	}+
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	if ( u < v ) {+
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	    n -= u;+
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	} else {+
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	    n += u;+
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	}+
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	v = u;+
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    }+
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+
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    if ( str.toLower() == toRoman(n) ) {+
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	return n;+
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    } else {+
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	return 0;+
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    }+
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}+
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+
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QT_END_NAMESPACE+
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