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/***************************************************************************
* Copyright (C) 2003-2005 by The Amarok Developers *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Steet, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef AMAROK_SCANCONTROLLER_H
#define AMAROK_SCANCONTROLLER_H
#include <tqmutex.h>
#include <tqxml.h> //baseclass
#include "threadmanager.h" //baseclass
class CollectionDB;
class KProcIO;
/**
* @class ScanController
* @short Starts and controls the external amarokcollectionscanner application.
* @author Mark Kretschmann <markey@web.de>
*
* The collection scanner itself is run in an external process, unlike before, where it
* used to be thread. The advantage is that the scanner cannot crash the Amarok main
* application any more. If it crashes we can simply restart it.
*
* Amarok communicates with the scanner via the ScanController class, which processes
* XML entities written to stdout by the scanner process. For XML parsing an event
* driven SAX2 parser is used, which can process the entities as they arrive, without
* the need for a DOM document structure.
*/
#ifdef Q_MOC_RUN
// MOC_SKIP_BEGIN
class ScanController : public JobBase, public TQXmlDefaultHandler
// MOC_SKIP_END
#else // Q_MOC_RUN
class ScanController : public ThreadManager::DependentJob, public TQXmlDefaultHandler
#endif // Q_MOC_RUN
{
Q_OBJECT
public:
static const int RestartEventType = 8891;
class RestartEvent : public TQCustomEvent {
public:
RestartEvent() : TQCustomEvent( RestartEventType ) {}
};
static const int PlaylistFoundEventType = 8890;
class PlaylistFoundEvent : public TQCustomEvent {
public:
PlaylistFoundEvent( TQString path )
: TQCustomEvent( PlaylistFoundEventType )
, m_path( path ) {}
TQString path() { return m_path; }
private:
TQString m_path;
};
public:
ScanController( CollectionDB* parent, bool incremental, const TQStringList& folders = TQStringList() );
~ScanController();
static ScanController* instance();
virtual void completeJob( void );
bool isIncremental() const { return m_incremental; }
bool hasChanged() const { return m_hasChanged; }
void notifyThisBundle( MetaBundle* bundle );
bool isPaused() { return m_isPaused; }
bool tablesCreated() { return m_tablesCreated; }
signals:
void scannerAcknowledged();
void scanDone( bool changed );
public slots:
bool requestPause();
bool requestUnpause();
void requestAcknowledged();
void slotFileMoved( const TQString &src, const TQString &dest );
private slots:
void slotReadReady();
private:
void initIncremental();
virtual bool doJob();
static void setInstance( ScanController* instance );
bool startElement( const TQString&, const TQString &localName, const TQString&, const TQXmlAttributes &attrs );
void customEvent( TQCustomEvent* );
// Member variables:
static const uint MAX_RESTARTS = 80;
static const uint MAX_FAILURE_PERCENTAGE = 5;
KProcIO* m_scanner;
TQStringList m_folders;
TQStringList m_foldersToRemove;
bool m_incremental;
bool m_hasChanged;
TQString m_xmlData;
TQMutex m_dataMutex;
TQXmlInputSource* m_source;
TQXmlSimpleReader* m_reader;
TQStringList m_crashedFiles;
// Every file that the collection scanner finds is marked
// here, as well as the source of all files that the AFT code
// detects as having been moved. These are the files that
// have definitely not been deleted. The key is the absolute
// path.
TQMap<TQString,TQString> m_filesAdded;
TQMap<TQString,TQString> m_filesDeleted;
TQMutex m_fileMapsMutex;
static ScanController* currController;
MetaBundle* m_waitingBundle;
bool m_lastCommandPaused;
bool m_isPaused;
bool m_tablesCreated;
int m_scanCount;
};
#endif // AMAROK_SCANCONTROLLER_H
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