/****************************************************************************

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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

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** GNU Lesser General Public License Usage

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** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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****************************************************************************/

#ifndef QFILEINFOGATHERER_H

#define QFILEINFOGATHERER_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <qthread.h>

#include <qmutex.h>

#include <qwaitcondition.h>

#include <qfilesystemwatcher.h>

#include <qfileiconprovider.h>

#include <qfsfileengine.h>

#include <qpair.h>

#include <qdatetime.h>

#include <qstack.h>

#include <qdir.h>

QT_BEGIN_NAMESPACE

class QExtendedInformation {

public:

    enum Type { Dir, File, System };

    QExtendedInformation() {}

    QExtendedInformation(const QFileInfo &info) : mFileInfo(info) {}

    inline bool isDir() { return type() == Dir; }

    inline bool isFile() { return type() == File; }

    inline bool isSystem() { return type() == System; }

    bool operator ==(const QExtendedInformation &fileInfo) const {

       return mFileInfo == fileInfo.mFileInfo

       && displayType == fileInfo.displayType

       && permissions() == fileInfo.permissions();

    }

    bool isCaseSensitive() const {

        QFSFileEngine fe(mFileInfo.absoluteFilePath());

        return fe.caseSensitive();

    }

    QFile::Permissions permissions() const {

        return mPermissions;

    }

    void setPermissions (QFile::Permissions permissions) {

        mPermissions = permissions;

    }

    Type type() const {

        if (mFileInfo.isDir()) {

            return QExtendedInformation::Dir;

        }

        if (mFileInfo.isFile()) {

            return QExtendedInformation::File;

        }

        if (!mFileInfo.exists() && mFileInfo.isSymLink()) {

            return QExtendedInformation::System;

        }

        return QExtendedInformation::System;

    }

    bool isSymLink() const {

        return mFileInfo.isSymLink();

    }

    bool isHidden() const {

        return mFileInfo.isHidden();

    }

    QFileInfo fileInfo() const {

        return mFileInfo;

    }

    QDateTime lastModified() const {

        return mFileInfo.lastModified();

    }

    qint64 size() const {

        qint64 size = -1;

        if (type() == QExtendedInformation::Dir)

            size = 0;

        if (type() == QExtendedInformation::File)

            size = mFileInfo.size();

        if (!mFileInfo.exists() && !mFileInfo.isSymLink())

            size = -1;

        return size;

    }

    QString displayType;

    QIcon icon;

private :

    QFileInfo mFileInfo;

    QFile::Permissions mPermissions;

};

class QFileIconProvider;

#ifndef QT_NO_FILESYSTEMMODEL

class Q_AUTOTEST_EXPORT QFileInfoGatherer : public QThread

{

Q_OBJECT

Q_SIGNALS:

    void updates(const QString &directory, const QList<QPair<QString, QFileInfo> > &updates);

    void newListOfFiles(const QString &directory, const QStringList &listOfFiles) const;

    void nameResolved(const QString &fileName, const QString &resolvedName) const;

public:

    QFileInfoGatherer(QObject *parent = 0);

    ~QFileInfoGatherer();

    void clear();

    void removePath(const QString &path);

    QExtendedInformation getInfo(const QFileInfo &info) const;

public Q_SLOTS:

    void list(const QString &directoryPath);

    void fetchExtendedInformation(const QString &path, const QStringList &files);

    void updateFile(const QString &path);

    void setResolveSymlinks(bool enable);

    bool resolveSymlinks() const;

    void setIconProvider(QFileIconProvider *provider);

    QFileIconProvider *iconProvider() const;

protected:

    void run();

    void getFileInfos(const QString &path, const QStringList &files);

private:

    void fetch(const QFileInfo &info, QTime &base, bool &firstTime, QList<QPair<QString, QFileInfo> > &updatedFiles, const QString &path);

    QString translateDriveName(const QFileInfo &drive) const;

    QFile::Permissions translatePermissions(const QFileInfo &fileInfo) const;

    QMutex mutex;

    QWaitCondition condition;

    volatile bool abort;

    QStack<QString> path;

    QStack<QStringList> files;

#ifndef QT_NO_FILESYSTEMWATCHER

    QFileSystemWatcher *watcher;

#endif

    bool m_resolveSymlinks;

    QFileIconProvider *m_iconProvider;

    QFileIconProvider defaultProvider;

#ifndef Q_OS_WIN

    uint userId;

    uint groupId;

#endif

public :

    //for testing purpose

    static bool fetchedRoot;

};

#endif // QT_NO_FILESYSTEMMODEL

QT_END_NAMESPACE

#endif // QFILEINFOGATHERER_H