/*

* Copyright (c) 2006-2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:   Contains MNcdInstalledContent interface

*

*/

#ifndef M_NCD_INSTALLED_CONTENT_H

#define M_NCD_INSTALLED_CONTENT_H

#include "catalogsbase.h"

#include "ncdinterfaceids.h"

/**

 *  Interface for accessing installed content.

 *

 *  This interface provides methods for checking the status of the installed content. 

 *  The actual content interfaces are queried by using QueryInterfaceL(). These interfaces

 *  include MNcdInstalledApplication, MNcdInstalledTheme and MNcdInstalledFile.

 *

 *  @see MNcdNodeInstall 

 *  @see MNcdInstalledApplication

 *  @see MNcdInstalledTheme

 *  @see MNcdInstalledFile

 *

 *  

 */

class MNcdInstalledContent : public virtual MCatalogsBase

    {

public:

    /**

     * Unique identifier for the interface, required for all MCatalogsBase interfaces.

     *

     * 

     */

    enum { KInterfaceUid = ENcdInstalledContentUid };

    /**

     * Types of installed content

     * 

     * 

     */

    enum TInstalledContentType 

        {

        /**

         * Normal content

         */

        EInstalledContent,

        /**

         * Required dependency

         */

        EInstalledDependency,

        /**

         * Application that should be launched

         */

        EInstalledLauncher

        };

    /**

     * Checks if the item content has already been installed and is currently present in the

     * device.

     *

     * 

     * @return ETrue if the item content has been installed and is present, EFalse otherwise.

     * @exception Leave System wide error code.    

     * @note This is always ETrue for content that is of EInstalledLauncher type 

     */

    virtual TBool IsInstalledL() const = 0;

    /**

     * Checks if the content is allowed to be launched. 

     *

     * If this returns EFalse, the content should not be launched even if it has been

     * successfully installed.

     *

     * 

     * @return ETrue if the content can be launched.

     * @note This method does not check if the content has been installed or if it's

     * currently present.

     * @note For EInstalledLauncher content this is both launchable 

     * and installed status

     */

    virtual TBool IsLaunchable() const = 0;

    /**

     * Content type getter

     *

     * 

     * @return Type of the content

     */

    virtual TInstalledContentType ContentType() const = 0;

protected:

    /**

     * Destructor.

     * 

     * @see MCatalogsBase::~MCatalogsBase()

     */

    virtual ~MNcdInstalledContent() {}

    };

#endif // M_NCD_INSTALLED_CONTENT_H