dataloader.h

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/*
        Author: Marco Costalba (C) 2005-2006

        Copyright: See COPYING file that comes with this distribution

*/
#ifndef DATALOADER_H
#define DATALOADER_H

#include <qobject.h>
#include <qtimer.h>
#include <qdatetime.h>
#include <qfile.h>

class QString;
class Git;
class FileHistory;
class QProcess;
class MyProcess;

// data exchange facility with git-rev-list could be based on QProcess or on
// a temporary file (default). Uncomment following line to use QProcess
// #define USE_QPROCESS

class DataLoader : public QObject {
Q_OBJECT
public:
        DataLoader(Git* g, FileHistory* f);
        ~DataLoader();
        bool start(const QStringList& args, const QString& wd);

public slots:
        void on_procDataReady(const QByteArray&);
        void on_eof();

signals:
        void newDataReady(const FileHistory*);
        void loaded(const FileHistory*,ulong,int,bool,const QString&,const QString&);

private slots:
        void on_cancel();
        void on_cancel(const FileHistory*);
        void on_timeout();

private:
        void parseSingleBuffer(const QByteArray& ba);
        void addSplittedChunks(const QByteArray* halfChunk);
        bool doStart(const QStringList& args, const QString& wd);
        ulong readNewData(bool lastBuffer);

        Git* git;
        FileHistory* fh;
        QByteArray* halfChunk;
        QTime loadTime;
        QTimer guiUpdateTimer;
        ulong loadedBytes;
        bool isProcExited;
        bool parsing;
        bool canceling;

#ifdef USE_QPROCESS
        QProcess* proc;
#else
        MyProcess* proc;
        QString procPID;
        QString scriptFileName;
        QString dataFileName;
        QFile dataFile;
#endif
};

#endif

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