/****************************************************************************
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** 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
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****************************************************************************/

#ifndef QFILESYSTEMWATCHER_P_H
#define QFILESYSTEMWATCHER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of the QLibrary class.  This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//

#include "qfilesystemwatcher.h"

#ifndef QT_NO_FILESYSTEMWATCHER

#include <private/qobject_p.h>

#include <QtCore/qstringlist.h>
#include <QtCore/qthread.h>

QT_BEGIN_NAMESPACE

class QFileSystemWatcherEngine : public QThread
{
    Q_OBJECT

protected:
    inline QFileSystemWatcherEngine(bool move = true)
    {
        if (move)
            moveToThread(this);
    }

public:
    // fills \a files and \a directories with the \a paths it could
    // watch, and returns a list of paths this engine could not watch
    virtual QStringList addPaths(const QStringList &paths,
                                 QStringList *files,
                                 QStringList *directories) = 0;
    // removes \a paths from \a files and \a directories, and returns
    // a list of paths this engine does not know about (either addPath
    // failed or wasn't called)
    virtual QStringList removePaths(const QStringList &paths,
                                    QStringList *files,
                                    QStringList *directories) = 0;

    virtual void stop() = 0;

Q_SIGNALS:
    void fileChanged(const QString &path, bool removed);
    void directoryChanged(const QString &path, bool removed);
};

class QFileSystemWatcherPrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QFileSystemWatcher)

    static QFileSystemWatcherEngine *createNativeEngine();

public:
    QFileSystemWatcherPrivate();
    void init();
    void initPollerEngine();
    void initForcedEngine(const QString &);

    QFileSystemWatcherEngine *native, *poller, *forced;
    QStringList files, directories;

    // private slots
    void _q_fileChanged(const QString &path, bool removed);
    void _q_directoryChanged(const QString &path, bool removed);
};


QT_END_NAMESPACE
#endif // QT_NO_FILESYSTEMWATCHER
#endif // QFILESYSTEMWATCHER_P_H
