// -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; -*-
/*
 *
 * Copyright (C)  2003  Zack Rusin <zack@kde.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301  USA
 */
#ifndef SONNET_LOADER_P_H
#define SONNET_LOADER_P_H

#include <kdecore_export.h>
#include <ksharedptr.h>

#include <QtCore/QObject>
#include <QtCore/QStringList>
#include <QtCore/QString>

class KService;
namespace Sonnet
{
    class Settings;
    class SpellerPlugin;

    /**
     * \internal
     * @short Class used to deal with dictionaries
     *
     * This class manages all dictionaries. It's the top level
     * Sonnet class, you can think of it as the kernel or manager
     * of the Sonnet architecture.
     */
    class KDECORE_EXPORT Loader : public QObject
    {
        Q_OBJECT
    public:
        /**
         * Constructs the loader.
         *
         * It's very important that you leave the return value in a Loader::Ptr.
         * Loader is reference counted so if you don't want to have it deleted
         * under you simply have to hold it in a Loader::Ptr for as long as
         * you're using it.
         */
        static Loader *openLoader();

    public:
        Loader();
        ~Loader();

        /**
         * Returns dictionary for the given language and preferred client.
         *
         * @param language specifies the language of the dictionary. If an
         *        empty string will be passed the default language will
         *        be used. Has to be one of the values returned by
         *        \ref languages()
         * @param client specifies the preferred client. If no client is
         *               specified a client which supports the given
         *               language is picked. If a few clients supports
         *               the same language the one with the biggest
         *               reliability value is returned.
         *
         */
        SpellerPlugin *createSpeller(
            const QString& language = QString(),
            const QString& client = QString()) const;

        /**
         * Returns names of all supported clients (e.g. ISpell, ASpell)
         */
        QStringList clients() const;

        /**
         * Returns a list of supported languages.
         */
        QStringList languages() const;

        /**
         * Returns a localized list of names of supported languages.
         */
        QStringList languageNames() const;

        /**
         * @param langCode the dictionary name/language code, e.g. en_gb
         * @return the localized language name, e.g. "British English"
         * @since 4.2
         */
        QString languageNameForCode(const QString &langCode) const;

        /**
         * Returns the Settings object used by the loader.
         */
        Settings *settings() const;
    Q_SIGNALS:
        /**
         * Signal is emitted whenever the Settings object
         * associated with this Loader changes.
         */
        void configurationChanged();

    protected:
        friend class Settings;
        void changed();
    private:
        void loadPlugins();
        void loadPlugin(const KSharedPtr<KService>&);
    private:
        class Private;
        Private *const d;
    };
}

#endif // SONNET_LOADER_P_H