ncdengine/inc/ncdfiledownloadoperation.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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/*
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* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:   File download operation interface definition
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*
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*/
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#ifndef M_NCD_FILE_DOWNLOAD_OPERATION_H
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#define M_NCD_FILE_DOWNLOAD_OPERATION_H
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#include <e32cmn.h>
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#include "ncdoperation.h"
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#include "ncdinterfaceids.h"
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#include "ncdoperationdatatypes.h"
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class MNcdFileDownloadOperationObserver;
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/**
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 *  File download operation interface.
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 *
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 *  A file download operation handles the downloading of one file to a
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 *  specified location in the local filesystem.
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 *
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 *  
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 *  @see MNcdFileDownloadOperationObserver
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 */
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class MNcdFileDownloadOperation : public MNcdOperation
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    {
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public:
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    /**
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     * Unique identifier for the interface, required for all MCatalogsBase interfaces.
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     *
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     * 
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     */
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    enum { KInterfaceUid = ENcdFileDownloadOperationUid };
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    /**
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     * Get target file name.
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     *
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     * 
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     * @returns Full path to target file. Empty string if the path has not
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     *          been set.
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     */
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    virtual const TDesC& TargetFileName() const = 0;
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    /**
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     * Pause the download.
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     *
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     * @note Does nothing if the download was already paused, or if the
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     *  operation is not yet started.
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     *
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     * 
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     * @exception Leave System wide error code.
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     */
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    virtual void PauseL() = 0;
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    /**
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     * Resume a paused download.
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     *
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     * @note Does nothing if the download has not been paused, or if the
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     *  operation is not yet started.
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     *
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     * 
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     * @exception Leave System wide error code.
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     */
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    virtual void ResumeL() = 0;
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    /**
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     * Return the paused state of the download.
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     *
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     * 
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     * @return ETrue, if the operation has been started and PauseL() has
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     *  been called successfully, pausing the download. EFalse otherwise.
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     */
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    virtual TBool IsPaused() = 0;
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    /**
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     * Can download be paused
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     *
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     * @return ETrue if the operation can be paused, EFalse if pausing is not
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     * allowed
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     * @note Some DRM content is not pausable
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     * @note Pausable state may change during the operation
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     */
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    virtual TBool IsPausableL() = 0;
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    /**
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     * Download data type getter
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     *
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     * @return Type of the data the operation is downloading
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     * @see ncdoperationdatatypes.h
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     */
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    virtual TNcdDownloadDataType DownloadDataType() const = 0;
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protected:
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    /**
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     * Destructor.
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     *
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     * @see MCatalogsBase::~MCatalogsBase
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     */
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    virtual ~MNcdFileDownloadOperation() {}
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    };
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#endif //  M_NCD_FILE_DOWNLOAD_OPERATION_H