--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ncdengine/inc/ncddownloadoperation.h	Thu Dec 17 08:51:10 2009 +0200
@@ -0,0 +1,166 @@
+/*
+* Copyright (c) 2006 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:   Download operation interface definition
+*
+*/
+	
+
+#ifndef M_NCD_DOWNLOAD_OPERATION_H
+#define M_NCD_DOWNLOAD_OPERATION_H
+
+#include <e32cmn.h>
+
+#include "ncdoperation.h"
+#include "ncdinterfaceids.h"
+#include "ncdoperationdatatypes.h"
+
+class MNcdDownloadOperationObserver;
+
+/**
+ *  Download operation interface.
+ *
+ *  A download operation handles the downloading of one or more files.
+ *
+ *  The files are downloaded consecutively and in a predefined order.
+ *  If parallel downloading is desired, multiple operations can be started.
+ *
+ *  Common uses for download operatios are downloading a downloadable node's 
+ *  content and downloading graphics for nodes.
+ *
+ *  Download operations can be queried for the number of the download that is 
+ *  currently being downloaded. The progress information is always relative
+ *  to the current download.
+ *  
+ *  
+ *  @see MNcdDownloadOperationObserver
+ *  @see MNcdNodeDownload
+ */
+class MNcdDownloadOperation : public MNcdOperation
+    {
+    
+public:
+
+    /**
+     * Unique identifier for the interface, required for all MCatalogsBase interfaces.
+     *
+     * 
+     */
+    enum { KInterfaceUid = ENcdDownloadOperationUid };    
+    
+
+    /**
+     * Getter for file count. This is the total number of files this operation
+     * is downloading.
+     *
+     * 
+     * @return Total number of files to be downloaded.
+     */
+    virtual TInt FileCount() = 0;
+    
+
+    /**
+     * Getter for current file number. This is the number of the
+     * file that is currently being downloaded.
+     *
+     * 
+     * @return Number of the file currently being downloaded.
+     */
+    virtual TInt CurrentFile() = 0;
+    
+
+    /**
+     * Pause the download.
+     *
+     * @note Does nothing if the download was already paused, or if the
+     *  operation is not yet started.
+     *
+     * 
+     * @exception Leave System wide error code.
+     */
+    virtual void PauseL() = 0;
+
+
+    /**
+     * Resume a paused download.
+     *
+     * @note Does nothing if the download has not been paused, or if the
+     *  operation is not yet started.
+     *
+     * 
+     * @exception Leave System wide error code.
+     */
+    virtual void ResumeL() = 0;
+
+
+    /**
+     * Return the paused state of the download.
+     *
+     * 
+     * @return ETrue, if the operation has been started and PauseL() has
+     *  been called successfully, pausing the download. EFalse otherwise.
+     */
+    virtual TBool IsPaused() = 0;
+    
+    
+    /**
+     * Can download be paused
+     *
+     * @return ETrue if the operation can be paused, EFalse if pausing is not
+     * allowed
+     * @leave Symbian error code
+     * @note Some DRM content is not pausable
+     * @note Pausable state may change during the operation
+     */
+    virtual TBool IsPausableL() = 0;
+
+    /**
+     * Add a new observer for this download operation.
+     *
+     * If the observer has already been added, this function doesn't do anything.
+     *
+     * 
+     * @exception Leave System wide error code.
+     */
+    virtual void AddObserverL( MNcdDownloadOperationObserver& aObserver ) = 0;
+
+    /**
+     * Remove an observer previously added with AddObserverL().
+     *
+     * @return ETrue if an observer was removed
+     * 
+     */
+    virtual TBool RemoveObserver( MNcdDownloadOperationObserver& aObserver ) = 0;
+
+
+    /**
+     * Download data type getter
+     *
+     * @return Type of the data the operation is downloading
+     * @see ncdoperationdatatypes.h
+     */
+    virtual TNcdDownloadDataType DownloadDataType() const = 0;
+
+protected:
+
+    /**
+    * Destructor.
+    *
+    * @see MCatalogsBase::~MCatalogsBase
+    */
+    virtual ~MNcdDownloadOperation() {}
+
+    };
+	
+	
+#endif //  M_NCD_DOWNLOAD_OPERATION_H