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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*
+ text.cpp
+*/
+
+#include <qregexp.h>
+#include "text.h"
+#include <stdio.h>
+
+QT_BEGIN_NAMESPACE
+
+Text::Text()
+ : first(0), last(0)
+{
+}
+
+Text::Text(const QString &str)
+ : first(0), last(0)
+{
+ operator<<(str);
+}
+
+Text::Text( const Text& text )
+ : first(0), last(0)
+{
+ operator=( text );
+}
+
+Text::~Text()
+{
+ clear();
+}
+
+Text& Text::operator=( const Text& text )
+{
+ if ( this != &text ) {
+ clear();
+ operator<<( text );
+ }
+ return *this;
+}
+
+Text& Text::operator<<( Atom::Type atomType )
+{
+ return operator<<( Atom(atomType) );
+}
+
+Text& Text::operator<<( const QString& string )
+{
+ return operator<<( Atom(Atom::String, string) );
+}
+
+Text& Text::operator<<( const Atom& atom )
+{
+ if ( first == 0 ) {
+ first = new Atom( atom.type(), atom.string() );
+ last = first;
+ } else {
+ last = new Atom( last, atom.type(), atom.string() );
+ }
+ return *this;
+}
+
+Text& Text::operator<<( const Text& text )
+{
+ const Atom *atom = text.firstAtom();
+ while ( atom != 0 ) {
+ operator<<( *atom );
+ atom = atom->next();
+ }
+ return *this;
+}
+
+void Text::stripFirstAtom()
+{
+ if ( first != 0 ) {
+ if ( first == last )
+ last = 0;
+ Atom *oldFirst = first;
+ first = first->next();
+ delete oldFirst;
+ }
+}
+
+void Text::stripLastAtom()
+{
+ if ( last != 0 ) {
+ Atom *oldLast = last;
+ if ( first == last ) {
+ first = 0;
+ last = 0;
+ } else {
+ last = first;
+ while ( last->next() != oldLast )
+ last = last->next();
+ last->setNext( 0 );
+ }
+ delete oldLast;
+ }
+}
+
+QString Text::toString() const
+{
+ QString str;
+ const Atom *atom = firstAtom();
+ while ( atom != 0 ) {
+ if ( atom->type() == Atom::String || atom->type() == Atom::AutoLink )
+ str += atom->string();
+ atom = atom->next();
+ }
+ return str;
+}
+
+Text Text::subText( Atom::Type left, Atom::Type right, const Atom *from ) const
+{
+ const Atom *begin = from ? from : firstAtom();
+ const Atom *end;
+
+ while ( begin != 0 && begin->type() != left )
+ begin = begin->next();
+ if ( begin != 0 )
+ begin = begin->next();
+
+ end = begin;
+ while ( end != 0 && end->type() != right )
+ end = end->next();
+ if ( end == 0 )
+ begin = 0;
+ return subText( begin, end );
+}
+
+Text Text::sectionHeading(const Atom *sectionLeft)
+{
+ if ( sectionLeft != 0 ) {
+ const Atom *begin = sectionLeft;
+ while ( begin != 0 && begin->type() != Atom::SectionHeadingLeft )
+ begin = begin->next();
+ if ( begin != 0 )
+ begin = begin->next();
+
+ const Atom *end = begin;
+ while ( end != 0 && end->type() != Atom::SectionHeadingRight )
+ end = end->next();
+
+ if ( end != 0 )
+ return subText( begin, end );
+ }
+ return Text();
+}
+
+const Atom *Text::sectionHeadingAtom(const Atom *sectionLeft)
+{
+ if ( sectionLeft != 0 ) {
+ const Atom *begin = sectionLeft;
+ while ( begin != 0 && begin->type() != Atom::SectionHeadingLeft )
+ begin = begin->next();
+ if ( begin != 0 )
+ begin = begin->next();
+
+ return begin;
+ }
+ return 0;
+}
+
+void Text::dump() const
+{
+ const Atom *atom = firstAtom();
+ while ( atom != 0 ) {
+ QString str = atom->string();
+ str.replace( "\\", "\\\\" );
+ str.replace( "\"", "\\\"" );
+ str.replace( "\n", "\\n" );
+ str.replace( QRegExp("[^\x20-\x7e]"), "?" );
+ if ( !str.isEmpty() )
+ str = " \"" + str + "\"";
+ fprintf(stderr, " %-15s%s\n", atom->typeString().toLatin1().data(), str.toLatin1().data() );
+ atom = atom->next();
+ }
+}
+
+Text Text::subText( const Atom *begin, const Atom *end )
+{
+ Text text;
+ if ( begin != 0 ) {
+ while ( begin != end ) {
+ text << *begin;
+ begin = begin->next();
+ }
+ }
+ return text;
+}
+
+void Text::clear()
+{
+ while ( first != 0 ) {
+ Atom *atom = first;
+ first = first->next();
+ delete atom;
+ }
+ first = 0;
+ last = 0;
+}
+
+int Text::compare(const Text &text1, const Text &text2)
+{
+ if (text1.isEmpty())
+ return text2.isEmpty() ? 0 : -1;
+ if (text2.isEmpty())
+ return 1;
+
+ const Atom *atom1 = text1.firstAtom();
+ const Atom *atom2 = text2.firstAtom();
+
+ for (;;) {
+ if (atom1->type() != atom2->type())
+ return (int)atom1->type() - (int)atom2->type();
+ int cmp = QString::compare(atom1->string(), atom2->string());
+ if (cmp != 0)
+ return cmp;
+
+ if (atom1 == text1.lastAtom())
+ return atom2 == text2.lastAtom() ? 0 : -1;
+ if (atom2 == text2.lastAtom())
+ return 1;
+ atom1 = atom1->next();
+ atom2 = atom2->next();
+ }
+}
+
+QT_END_NAMESPACE