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/*
This file is part of KWrite
Copyright (c) 2000 Waldo Bastian <bastian@kde.org>
Copyright (c) 2002 Joseph Wenninger <jowenn@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef _KWBUFFER_H_
#define _KWBUFFER_H_
#include <qstring.h>
#include <qstringlist.h>
#include <qlist.h>
#include <qobject.h>
#include <qtimer.h>
#include "katetextline.h"
class QTextCodec;
class KWBufBlock;
/**
* The KWBuffer class maintains a collections of lines.
* It allows to maintain state information in a lazy way.
* It handles swapping out of data using secondary storage.
*
* It is designed to handle large amounts of text-data efficiently
* with respect to CPU and memory usage.
*
* @author Waldo Bastian <bastian@kde.org>
*/
class KWBuffer : public QObject
{
Q_OBJECT
public:
/**
* Create an empty buffer.
*/
KWBuffer();
/**
* Insert a file at line @p line in the buffer.
* Using @p codec to decode the file.
*/
void insertFile(int line, const QString &file, QTextCodec *codec);
/**
* Insert a block of data at line @p line in the buffer.
* Using @p codec to decode the file.
*/
void insertData(int line, const QByteArray &data, QTextCodec *codec);
/**
* Return the total number of lines in the buffer.
*/
int count();
/**
* Return line @p i
*/
TextLine::Ptr line(int i);
/**
* Insert @p line in front of line @p i
*/
void insertLine(int i, TextLine::Ptr line);
/**
* Remove line @p i
*/
void removeLine(int i);
/**
* Change line @p i
*/
void changeLine(int i);
/**
* Clear the buffer.
*/
void clear();
signals:
void textChanged();
/**
* Emitted during loading.
*/
void linesChanged(int lines);
void needHighlight(long,long);
protected:
/**
* Make sure @p buf gets loaded.
*/
void loadBlock(KWBufBlock *buf);
/**
* Make sure @p buf gets parsed.
*/
void parseBlock(KWBufBlock *buf);
/**
* Mark @p buf dirty.
*/
void dirtyBlock(KWBufBlock *buf);
/**
* Find the block containing line @p i
*/
KWBufBlock *findBlock(int i);
/**
* Load a part of the file that is currently loading.
*/
void loadFilePart();
protected slots:
void slotLoadFile();
protected:
TextLine::List m_stringList;
TextLine::List::Iterator m_stringListIt;
int m_stringListCurrent;
int m_lineCount;
void seek(int i);
};
#endif
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