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/***************************************************************************
* Copyright (C) 2012 by Peter Penz <[email protected]> *
* Copyright (C) 2013 by Vishesh Handa <[email protected]> *
* *
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
#ifndef KBALOO_ROLESPROVIDER_H
#define KBALOO_ROLESPROVIDER_H
#include "dolphin_export.h"
#include <QHash>
#include <QSet>
#include <QVariant>
namespace Baloo {
class File;
}
/**
* @brief Allows accessing metadata of a file by providing KFileItemModel roles.
*
* Is a helper class for KFileItemModelRolesUpdater to retrieve roles that
* are only accessible with Baloo.
*/
class DOLPHIN_EXPORT KBalooRolesProvider
{
public:
static KBalooRolesProvider& instance();
virtual ~KBalooRolesProvider();
/**
* @return Roles that can be provided by KBalooRolesProvider.
*/
QSet<QByteArray> roles() const;
/**
* @return Values for the roles \a roles that can be determined from the file
* with the URL \a url.
*/
QHash<QByteArray, QVariant> roleValues(const Baloo::File& file,
const QSet<QByteArray>& roles) const;
QByteArray roleForProperty(const QString& property) const;
protected:
KBalooRolesProvider();
private:
/**
* @return User visible string for the given tag-values.
*/
QString tagsFromValues(const QStringList& values) const;
/**
* @return User visible string for the EXIF-orientation property
* which can have the values 0 to 8.
* (see http://sylvana.net/jpegcrop/exif_orientation.html)
*/
QString orientationFromValue(int value) const;
/**
* @return Duration in the format HH::MM::SS for the value given
* in seconds.
*/
QString durationFromValue(int value) const;
private:
QSet<QByteArray> m_roles;
QHash<QString, QByteArray> m_roleForProperty;
friend class KBalooRolesProviderSingleton;
};
#endif
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