File: kservicefactory.h

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/* This file is part of the KDE project
   Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
   Copyright (C) 2006 David Faure <faure@kde.org>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#ifndef __kservicefactory_h__
#define __kservicefactory_h__

#include <QtCore/QStringList>

#include "kserviceoffer.h"
#include "ksycocafactory.h"
#include <assert.h>

class KSycoca;
class KSycocaDict;

/**
 * @internal
 * A sycoca factory for services (e.g. applications)
 * It loads the services from parsing directories (e.g. prefix/share/applications/)
 * but can also create service from data streams or single config files
 *
 * Exported for kbuildsycoca, but not installed.
 */
class KDECORE_EXPORT KServiceFactory : public KSycocaFactory
{
    K_SYCOCAFACTORY( KST_KServiceFactory )
public:
    /**
     * Create factory
     */
    KServiceFactory();
    virtual ~KServiceFactory();

    /**
     * Construct a KService from a config file.
     */
    virtual KSycocaEntry *createEntry(const QString &, const char *) const
    { assert(0); return 0; }

    /**
     * Find a service (by translated name, e.g. "Terminal")
     * (Not virtual because not used inside kbuildsycoca4, only an external service for some KDE apps)
     */
    KService::Ptr findServiceByName( const QString &_name );

    /**
     * Find a service (by desktop file name, e.g. "konsole")
     */
    virtual KService::Ptr findServiceByDesktopName( const QString &_name );

    /**
     * Find a service ( by desktop path, e.g. "System/konsole.desktop")
     */
    virtual KService::Ptr findServiceByDesktopPath( const QString &_name );

    /**
     * Find a service ( by menu id, e.g. "kde-konsole.desktop")
     */
    virtual KService::Ptr findServiceByMenuId( const QString &_menuId );

    /**
     * @return the services supporting the given service type
     * The @p serviceOffersOffset allows to jump to the right entries directly.
     */
    KServiceOfferList offers( int serviceTypeOffset, int serviceOffersOffset );

    /**
     * @return the services supporting the given service type; without information about initialPreference
     * The @p serviceOffersOffset allows to jump to the right entries directly.
     */
    KService::List serviceOffers( int serviceTypeOffset, int serviceOffersOffset );

    /**
     * Test if a specific service is associated with a specific servicetype
     * @param serviceTypeOffset the offset of the service type being tested
     * @param serviceOffersOffset allows to jump to the right entries for the service type directly.
     * @param testedServiceOffset the offset of the service being tested
     */
    bool hasOffer( int serviceTypeOffset, int serviceOffersOffset, int testedServiceOffset );

    /**
     * @return all services. Very memory consuming, avoid using.
     */
    KService::List allServices();

    /**
     * @return the unique service factory, creating it if necessary
     */
    static KServiceFactory * self();

protected:
    virtual KService * createEntry(int offset) const;

    // All those variables are used by KBuildServiceFactory too
    int m_offerListOffset;
    KSycocaDict *m_nameDict;
    int m_nameDictOffset;
    KSycocaDict *m_relNameDict;
    int m_relNameDictOffset;
    KSycocaDict *m_menuIdDict;
    int m_menuIdDictOffset;

protected:
    virtual void virtual_hook( int id, void* data );
private:
    class KServiceFactoryPrivate* d;

    KService::Ptr serviceFromPath(const QString &_name);
};

#endif