/*

* Copyright (c) 2006-2007 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:  Active object for an asynchronous thumbnail request

 *

*/

#ifndef THUMBNAILREQUESTACTIVE_H

#define THUMBNAILREQUESTACTIVE_H

#include <e32base.h>

#include "thumbnailpanic.h"

#include "thumbnailmanager.h"

#include "thumbnailmanagerconstants.h"

#include "thumbnaillog.h"

class RFs;

class CFbsBitmap;

class RThumbnailSession;

class CThumbnailDataImpl;

class CThumbnailRequestQueue;

enum TThumbnailRequestType

    {

    EReqGetThumbnailHandle = 0, 

    EReqGetThumbnailPath = 1,

    EReqSetThumbnailBuffer = 2,

    EReqSetThumbnailBitmap = 3,

    EReqUpdateThumbnails = 4,

    EReqGetThumbnailHandleLater = 5,

};

/**

 *  Active object for an asynchronous thumbnail request.

 *

 *  @since S60 v5.0

 */

NONSHARABLE_CLASS( CThumbnailRequestActive ): public CActive

    {

public:

    /**

     * Destructor

     *

     * @since S60 v5.0

     */

    virtual ~CThumbnailRequestActive();

    /**

     * Two-phased constructor

     *

     * @since S60 v5.0

     * @param aFs Fileserver used.

     * @param aThumbnailSession Session used.

     * @param aObserver Observer to receive notifications about completed

     *                  operations.

     * @param aId Assigned ID of the request, session specific.

     * @param aPriority assigned processing priority

     * @param aQueue request processor

     * @return New CThumbnailRequestActive object.

     */

    static CThumbnailRequestActive* NewL( RFs& aFs, RThumbnailSession&

        aThumbnailSession, MThumbnailManagerObserver& aObserver,

        TThumbnailRequestId aId, TInt aPriority, CThumbnailRequestQueue* aQueue );

    /**

     * Get a thumbnail created from file object.

     *

     * @since S60 v5.0

     * @param aFile File from which the thumbnail is to be created.

     * @param aFlags Flags that control the creation of thumbnail.

     * @param aQualityPreference Quality preference value

     * @param aSize Requested size of the thumbnail.

     * @param aDisplayMode Display mode.

     * @param aPriority Priority of the request.

     * @param aClientData Pointer to arbitrary client data.

     *                    This pointer is not used by the API for

     *                    anything other than returning it in the

     *                    ThumbnailReady callback.

     * @param aTargetUri         Target URI to which the imported thumbnail is linked.

     */

    void GetThumbnailL( const RFile64& aFile, TThumbnailId aThumbnailId,

        CThumbnailManager::TThumbnailFlags aFlags, CThumbnailManager::TThumbnailQualityPreference

        aQualityPreference, const TSize& aSize, const TDisplayMode aDisplayMode,

        const TInt aPriority, TAny* aClientData, TBool aGeneratePersistentSizesOnly, const TDesC& aTargetUri = KNullDesC,

        TThumbnailSize aThumbnailSize = EUnknownThumbnailSize );

    /**

     * Get a thumbnail opening file object later.

     *

     * @since S60 v5.0

     * @param aPath Path to file from which the thumbnail is to be created.

     * @param aFlags Flags that control the creation of thumbnail.

     * @param aQualityPreference Quality preference value

     * @param aSize Requested size of the thumbnail.

     * @param aDisplayMode Display mode.

     * @param aPriority Priority of the request.

     * @param aClientData Pointer to arbitrary client data.

     *                    This pointer is not used by the API for

     *                    anything other than returning it in the

     *                    ThumbnailReady callback.

     * @param aTargetUri         Target URI to which the imported thumbnail is linked.

     */

    void GetThumbnailL( TThumbnailId aThumbnailId, const TDesC& aPath,

        CThumbnailManager::TThumbnailFlags aFlags, CThumbnailManager::TThumbnailQualityPreference

        aQualityPreference, const TSize& aSize, const TDisplayMode aDisplayMode,

        const TInt aPriority, TAny* aClientData, TBool aGeneratePersistentSizesOnly, const TDesC& aTargetUri = KNullDesC,

        TThumbnailSize aThumbnailSize = EUnknownThumbnailSize );

    /**

     * Get a thumbnail created from file path.

     *

     * @since S60 v5.0

     * @param aPath Path to file from which the thumbnail is to be created.

     * @param aFlags Flags that control the creation of thumbnail.

     * @param aQualityPreference Quality preference value

     * @param aSize Requested size of the thumbnail.

     * @param aDisplayMode Display mode.

     * @param aPriority Priority of the request.

     * @param aClientData Pointer to arbitrary client data.

     *                    This pointer is not used by the API for

     *                    anything other than returning it in the

     *                    ThumbnailReady callback.

     * @param aGeneratePersistentSizesOnly 

     * @param aTargetUri         Target URI to which the imported thumbnail is linked.

     * @param aThumbnailSize Relative thumbnail size

     */

    void GetThumbnailL( const TDesC& aPath, TThumbnailId aThumbnailId,

        CThumbnailManager::TThumbnailFlags aFlags, 

        CThumbnailManager::TThumbnailQualityPreference aQualityPreference, 

        const TSize& aSize, const TDisplayMode aDisplayMode, const TInt aPriority, 

        TAny* aClientData, TBool aGeneratePersistentSizesOnly, 

        const TDesC& aTargetUri = KNullDesC, TThumbnailSize aThumbnailSize = EUnknownThumbnailSize );  

    /**

     * Set a thumbnail

     *

     * @since S60 v5.0

     * @param aBuffer Buffer containing image where the thumbnail is to be created.

     * @param aFlags Flags that control the creation of thumbnail.

     * @param aQualityPreference Quality preference value

     * @param aSize Requested size of the thumbnail.

     * @param aDisplayMode Display mode.

     * @param aPriority Priority of the request.

     * @param aClientData Pointer to arbitrary client data.

     *                    This pointer is not used by the API for

     *                    anything other than returning it in the

     *                    ThumbnailReady callback.

     * @param aGeneratePersistentSizesOnly

     * @param aTargetUri         Target URI to which the imported thumbnail is linked.

     * @param aThumbnailSize Requested thumbnail size 

     */    

    void SetThumbnailL( TDesC8* aBuffer, TThumbnailId aThumbnailId, const TDesC8& aMimeType,

        CThumbnailManager::TThumbnailFlags aFlags, CThumbnailManager

        ::TThumbnailQualityPreference aQualityPreference, const TSize& aSize, const

        TDisplayMode aDisplayMode, const TInt aPriority, TAny* aClientData, TBool aGeneratePersistentSizesOnly,

        const TDesC& aTargetUri, TThumbnailSize aThumbnailSize );

    /**

     * Set a thumbnail

     *

     * @since S60 v5.0

     * @param aBitmap Bitmap

     * @param aFlags Flags that control the creation of thumbnail.

     * @param aQualityPreference Quality preference value

     * @param aSize Requested size of the thumbnail.

     * @param aDisplayMode Display mode.

     * @param aPriority Priority of the request.

     * @param aClientData Pointer to arbitrary client data.

     *                    This pointer is not used by the API for

     *                    anything other than returning it in the

     *                    ThumbnailReady callback.

     * @param aGeneratePersistentSizesOnly

     * @param aTargetUri         Target URI to which the imported thumbnail is linked.

     * @param aThumbnailSize Requested thumbnail size 

     */    

    void SetThumbnailL( CFbsBitmap* aBitmap, TThumbnailId aThumbnailId, const TDesC8& aMimeType,

        CThumbnailManager::TThumbnailFlags aFlags, CThumbnailManager

        ::TThumbnailQualityPreference aQualityPreference, const TSize& aSize, const

        TDisplayMode aDisplayMode, const TInt aPriority, TAny* aClientData, TBool aGeneratePersistentSizesOnly,

        const TDesC& aTargetUri, TThumbnailSize aThumbnailSize );    

    /**

     * Update thumbnails by Id.

     *

     * @since S60 v5.0

     * @param aPath Path to file from which the thumbnail is to be created.

     * @param aFlags Flags that control the creation of thumbnail.

     * @param aQualityPreference Quality preference value

     * @param aSize Requested size of the thumbnail.

     * @param aDisplayMode Display mode.

     * @param aPriority Priority of the request.

     * @param aOrientation  Thumbnail orientation

     * @param aModified     Last modified

     */

    void UpdateThumbnailsL( const TDesC& aPath, const TThumbnailId aThumbnailId,

        CThumbnailManager::TThumbnailFlags aFlags, 

        CThumbnailManager::TThumbnailQualityPreference aQualityPreference, 

        const TDisplayMode aDisplayMode, const TInt aPriority, const TInt aOrientation,

        const TInt64 aModified );   

    /**

     * Delete thumbnails.

     *

     * @since S60 v5.0

     * @param aPath Path to file from which the thumbnail is to be created.

     * @param aPriority Priority of the request.

     */

    void DeleteThumbnails( const TDesC& aPath, const TThumbnailId aThumbnailId,

        const TInt aPriority );   

    /**

     * Start active request.

     *

     * @since S60 v5.0

     */

    void StartL();

    /**

     * Change priority of a request.

     *

     * @since S60 v5.0

     * @param aNewPriority New priority.

     * @return Error code.

     */

    void ChangePriority( const TInt aNewPriority );

    /**

     * Returns ID of thumbnail request.

     *

     * @since S60 v5.0

     * @return Request ID

     */

    TThumbnailRequestId RequestId()const;

    /**

     * Is thumbnail request completed

     *

     * @since S60 v5.0

     */

    TBool RequestCompleted()const;

	 /**

     * Is thumbnail request active

     *

     * @since S60 v5.0

     */

    TBool IsRequestActive()const;

    /**

     * Error handling function.

     *

     * @since S60 v5.0

     */

    void StartError( const TInt aErr );

private:

    /**

     * C++ default constructor

     *

     * @since S60 v5.0

     * @param aFs Fileserver used.

     * @param aThumbnailSession Session used.

     * @param aObserver Observer to receive notifications about completed

     *                  operations.

     * @param aId Assigned ID of the request, session specific.

     * @param aPriority assigned processing priority

     * @param aQueue request processor

     * @return New CThumbnailRequestActive object.

     */

    CThumbnailRequestActive( RFs& aFs, RThumbnailSession& aThumbnailSession,

        MThumbnailManagerObserver& aObserver, TThumbnailRequestId aId, TInt aPriority,

        CThumbnailRequestQueue* aQueue);

    /**

     * Symbian 2nd phase constructor can leave.

     *

     * @since S60 v5.0

     */

    void ConstructL();

    /**

     * Handles an active object's request completion event.

     *

     * @since S60 v5.0

     */

    void RunL();

    /**

     * Handles a leave occurring in the request completion event handler

     * RunL().

     *

     * @since S60 v5.0

     * @param aError The leave code.

     * @return Error code.

     */

    TInt RunError( TInt aError );

    /**

     * Implements cancellation of an outstanding request.

     *

     * @since S60 v5.0

     */

    void DoCancel();

    /**

     * Release bitmap instance kept by server process.

     *

     * @since S60 v5.0

     */

    void ReleaseServerBitmap();

    /**

     * Error handling function.

     *

     * @since S60 v5.0

     */

    void HandleError();

    /**

     * Request 2nd phase thumbnail

     *

     * @since S60 v5.0

     */

    void Get2ndPhaseThumbnailL();

    /**

     * Callback for timeout timer

     *

     * @since S60 v5.0

     */

    static TInt TimerCallBack(TAny* aAny);

private:

    // data

    /**

     * Session.

     */

    RThumbnailSession& iSession;

    /**

     * Request parameters.

     */

    TThumbnailRequestParams iParams;

    /**

     * Package for request parameters.

     */

    TThumbnailRequestParamsPckg iParamsPckg;

    /**

     * Observer to receive notifications about completed operations.

     */

    MThumbnailManagerObserver& iObserver;

    /**

     * Fileserver, not own

     */

    RFs& iFs;

    /**

     * Client data.

     */

    TAny* iClientData;

    /**

     * Callback, own.

     */

    CThumbnailDataImpl* iCallbackThumbnail;

    /**

     * Handle to bitmap, own.

     */

    TInt iBitmapHandle;

    /**

     * Error code.

     */

    TInt iError;

    /**

     * Request id of thumbnail request, session specific.

     */

    TThumbnailRequestId iRequestId;

    /**

     * Duplicated file handle for two phase operation

     */

    RFile64 iMyFileHandle;

    /**

     * If set, we are currently processing the preview thumbnail

     * of a two phase operation. If an error occurs, we can skip

     * directly to 2nd phase.

     */

    TBool iProcessingPreview;

    /**

     * If set, this request object can be deleted.

     */

    TBool iRequestCompleted;

	 /**

     * If set, this request object is under processing

     */

    TBool iRequestActive;

    /**

     * Bitmap that is passed to server

     */

    CFbsBitmap* iBitmap;

    // for activating requests

    RFile64 iFile;

    TFileName iPath;

    TFileName iTargetUri;

    TInt iOrientation;

    TInt64 iModified;

    // not own

    CThumbnailRequestQueue* iRequestQueue;

    TThumbnailRequestType iRequestType;

    // request timeout timer

    CPeriodic* iTimer;

    TInt iStartError;

    // request already canceled by client

    TBool iCanceled;

#ifdef _DEBUG

    TTime iStartExecTime;

#endif

};

#endif // THUMBNAILREQUESTACTIVE_H

// INLINE FUNCTIONS

inline TBool CThumbnailRequestActive::RequestCompleted()const

    {

    return iRequestCompleted;

    }

inline TBool CThumbnailRequestActive::IsRequestActive()const

    {

    if(IsActive())

        {

        return ETrue;

        }

    return iRequestActive;

    }

inline TThumbnailRequestId CThumbnailRequestActive::RequestId()const

    {

    __ASSERT_DEBUG(( iRequestId > 0 ), ThumbnailPanic( EThumbnailWrongId ));

    return iRequestId;

    }