/****************************************************************************+
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**+
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** Copyright (C) 2009 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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**+
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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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  text.cpp+
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*/+
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+
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#include <qregexp.h>+
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#include "text.h"+
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#include <stdio.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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Text::Text()+
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    : first(0), last(0)+
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{+
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}+
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+
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Text::Text(const QString &str)+
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    : first(0), last(0)+
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{+
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    operator<<(str);+
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}+
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+
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Text::Text( const Text& text )+
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    : first(0), last(0)+
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{+
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    operator=( text );+
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}+
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+
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Text::~Text()+
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{+
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    clear();+
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}+
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+
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Text& Text::operator=( const Text& text )+
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{+
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    if ( this != &text ) {+
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	clear();+
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	operator<<( text );+
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    }+
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    return *this;+
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}+
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+
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Text& Text::operator<<( Atom::Type atomType )+
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{+
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    return operator<<( Atom(atomType) );+
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}+
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+
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Text& Text::operator<<( const QString& string )+
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{+
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    return operator<<( Atom(Atom::String, string) );+
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}+
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+
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Text& Text::operator<<( const Atom& atom )+
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{+
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    if ( first == 0 ) {+
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	first = new Atom( atom.type(), atom.string() );+
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	last = first;+
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    } else {+
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	last = new Atom( last, atom.type(), atom.string() );+
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    }+
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    return *this;+
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}+
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+
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Text& Text::operator<<( const Text& text )+
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{+
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    const Atom *atom = text.firstAtom();+
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    while ( atom != 0 ) {+
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	operator<<( *atom );+
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	atom = atom->next();+
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    }+
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    return *this;+
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}+
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+
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void Text::stripFirstAtom()+
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{+
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    if ( first != 0 ) {+
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	if ( first == last )+
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	    last = 0;+
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	Atom *oldFirst = first;+
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	first = first->next();+
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	delete oldFirst;+
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    }+
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}+
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+
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void Text::stripLastAtom()+
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{+
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    if ( last != 0 ) {+
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	Atom *oldLast = last;+
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	if ( first == last ) {+
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	    first = 0;+
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	    last = 0;+
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	} else {+
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	    last = first;+
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	    while ( last->next() != oldLast )+
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		last = last->next();+
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	    last->setNext( 0 );+
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	}+
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	delete oldLast;+
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    }+
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}+
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+
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QString Text::toString() const+
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{+
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    QString str;+
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    const Atom *atom = firstAtom();+
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    while ( atom != 0 ) {+
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	if ( atom->type() == Atom::String || atom->type() == Atom::AutoLink )+
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	    str += atom->string();+
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	atom = atom->next();+
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    }+
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    return str;+
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}+
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+
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Text Text::subText( Atom::Type left, Atom::Type right, const Atom *from ) const+
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{+
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    const Atom *begin = from ? from : firstAtom();+
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    const Atom *end;+
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+
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    while ( begin != 0 && begin->type() != left )+
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	begin = begin->next();+
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    if ( begin != 0 )+
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	begin = begin->next();+
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+
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    end = begin;+
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    while ( end != 0 && end->type() != right )+
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	end = end->next();+
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    if ( end == 0 )+
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	begin = 0;+
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    return subText( begin, end );+
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}+
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+
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Text Text::sectionHeading(const Atom *sectionLeft)+
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{+
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    if ( sectionLeft != 0 ) {+
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	const Atom *begin = sectionLeft;+
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	while ( begin != 0 && begin->type() != Atom::SectionHeadingLeft )+
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	    begin = begin->next();+
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	if ( begin != 0 )+
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	    begin = begin->next();+
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+
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	const Atom *end = begin;+
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	while ( end != 0 && end->type() != Atom::SectionHeadingRight )+
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	    end = end->next();+
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+
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	if ( end != 0 )+
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	    return subText( begin, end );+
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    }+
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    return Text();+
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}+
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+
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const Atom *Text::sectionHeadingAtom(const Atom *sectionLeft)+
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{+
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    if ( sectionLeft != 0 ) {+
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	const Atom *begin = sectionLeft;+
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	while ( begin != 0 && begin->type() != Atom::SectionHeadingLeft )+
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	    begin = begin->next();+
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	if ( begin != 0 )+
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	    begin = begin->next();+
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+
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	return begin;+
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    }+
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    return 0;+
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}+
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+
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void Text::dump() const+
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{+
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    const Atom *atom = firstAtom();+
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    while ( atom != 0 ) {+
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	QString str = atom->string();+
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	str.replace( "\\", "\\\\" );+
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	str.replace( "\"", "\\\"" );+
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	str.replace( "\n", "\\n" );+
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	str.replace( QRegExp("[^\x20-\x7e]"), "?" );+
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	if ( !str.isEmpty() )+
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	    str = " \"" + str + "\"";+
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	fprintf(stderr, "    %-15s%s\n", atom->typeString().toLatin1().data(), str.toLatin1().data() );+
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	atom = atom->next();+
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    }+
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}+
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+
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Text Text::subText( const Atom *begin, const Atom *end )+
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{+
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    Text text;+
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    if ( begin != 0 ) {+
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	while ( begin != end ) {+
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	    text << *begin;+
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	    begin = begin->next();+
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	}+
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    }+
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    return text;+
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}+
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+
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void Text::clear()+
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{+
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    while ( first != 0 ) {+
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	Atom *atom = first;+
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	first = first->next();+
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	delete atom;+
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    }+
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    first = 0;+
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    last = 0;+
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}+
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+
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int Text::compare(const Text &text1, const Text &text2)+
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{+
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    if (text1.isEmpty())+
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	return text2.isEmpty() ? 0 : -1;+
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    if (text2.isEmpty())+
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	return 1;+
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+
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    const Atom *atom1 = text1.firstAtom();+
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    const Atom *atom2 = text2.firstAtom();+
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+
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    for (;;) {+
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	if (atom1->type() != atom2->type())+
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	    return (int)atom1->type() - (int)atom2->type();+
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	int cmp = QString::compare(atom1->string(), atom2->string());+
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        if (cmp != 0)+
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	    return cmp;+
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+
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    	if (atom1 == text1.lastAtom())+
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	    return atom2 == text2.lastAtom() ? 0 : -1;+
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	if (atom2 == text2.lastAtom())+
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	    return 1;+
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	atom1 = atom1->next();+
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        atom2 = atom2->next();+
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    }+
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}+
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+
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QT_END_NAMESPACE+
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