analitza/analitza/expressionstream.cpp

0001 /*************************************************************************************
0002  *  Copyright (C) 2012 by Aleix Pol <aleixpol@kde.org>                               *
0003  *                                                                                   *
0004  *  This program is free software; you can redistribute it and/or                    *
0005  *  modify it under the terms of the GNU General Public License                      *
0006  *  as published by the Free Software Foundation; either version 2                   *
0007  *  of the License, or (at your option) any later version.                           *
0008  *                                                                                   *
0009  *  This program is distributed in the hope that it will be useful,                  *
0010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of                   *
0011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                    *
0012  *  GNU General Public License for more details.                                     *
0013  *                                                                                   *
0014  *  You should have received a copy of the GNU General Public License                *
0015  *  along with this program; if not, write to the Free Software                      *
0016  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA   *
0017  *************************************************************************************/
0018
0019 #include "expressionstream.h"
0020
0021 using namespace Analitza;
0022
0023 ExpressionStream::ExpressionStream(QTextStream* dev)
0024     : m_dev(dev)
0025     , m_interrupted(false)
0026 {}
0027
0028 bool ExpressionStream::atEnd() const
0029 {
0030     return m_dev->atEnd();
0031 }
0032
0033 QString ExpressionStream::lastLine() const
0034 {
0035     return m_last;
0036 }
0037
0038 bool ExpressionStream::isInterrupted() const
0039 {
0040     return m_interrupted;
0041 }
0042
0043 Expression ExpressionStream::next()
0044 {
0045     m_last.clear();
0046     for(; !atEnd(); ) {
0047         m_last += m_dev->readLine()+'\n';
0048         if(Expression::isCompleteExpression(m_last)) {
0049             break;
0050         }
0051     }
0052     m_dev->skipWhiteSpace();
0053     m_interrupted = !Expression::isCompleteExpression(m_last);
0054     QString last = m_last.trimmed();
0055     return Analitza::Expression(last, Expression::isMathML(last));
0056 }