/*

* 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:   CUniEditorProcessImageOperation class definition.      

*

*/

#ifndef __UNIEDITORPROCESSIMAGEOPERATION_H

#define __UNIEDITORPROCESSIMAGEOPERATION_H

// INCLUDES

#include <e32base.h>

#include <msvapi.h>

#include <uniobject.h>

#include <uniimageprocessor.h>

#include <cmsvattachment.h>

#include "UniEditorOperation.h"

// FORWARD DECLARATIONS

class CMsgImageInfo; 

class CMsgImageControl;

class CUniEditorDocument;

class MMsvAttachmentManager;

class CMsvStore;

// DATA TYPES

// CLASS DECLARATION

/**

* CUniEditorProcessImageOperation

*

* @since 3.2

*/

class CUniEditorProcessImageOperation : public CUniEditorOperation,

                                        public MUniImageProcessorCallback

    {

    public: // new operations

        /**

        * Factory method

        */

        static CUniEditorProcessImageOperation* NewL( 

            MUniEditorOperationObserver& aObserver,

            CUniEditorDocument& aDocument,

            RFs& aFs );

        /**

        * Start image process operation

        *

        * @param aImageInfo

        * @param aAttachmentId  Attachment id, if the image is already stored as an attachment

        *                       KMsvNullIndexEntryId, otherwise.

        * @param aMessageSize

        */

        void Process( CMsgImageInfo* aImageInfo, TMsvAttachmentId aAttachmentId, TInt aMessageSize );

        /**

        * Destructor

        */

        virtual ~CUniEditorProcessImageOperation();

        /**

        * Detaches image info object.

        */

        CMsgImageInfo* DetachImageInfo();

        /**

        * Detaches attachment id.

        */

        void DetachAttachmentId( TMsvAttachmentId& aAttachmentId );

    protected:

        /**

        * From CActive

        */

        void RunL();

        /**

        * From CActive

        */

        TInt RunError( TInt aError );

        /**

        * From CUniEditorOperation

        */

        void DoCancelCleanup();

        /**

        * From MUniImageProcessorCallback

        */

        void ImageProcessingReady( TSize aBitmapSize, TInt aFileSize, TBool aCompressed );

    private: // new operations

        /**

        * C++ constructor

        */

        CUniEditorProcessImageOperation( MUniEditorOperationObserver& aObserver,

                                         CUniEditorDocument& aDocument,

                                         RFs& aFs );

        /**

        * 2nd phase constructor.

        */

        void ConstructL();

        /**

        * Returns optimal send image size.

        */

        TSize ImageSendSize() const;

        /**

        * Checks whether some processing is needed for the image.

        * Stores the possible processing method to "iProcessMethod".

        *

        * @return EFalse if aborted by user,

        *         ETrue  otherwise

        */

        TBool CheckNeedToProcess();

        /**

        * Creates empty attachment.

        */

        void CreateEmptyAttachmentL();

        /**

        * Start check step.

        */

        void DoStartCheck();

        /**

        * Start process step.

        */

        void DoStartProcessL();

        /**

        * Start resolve step.

        */

        void DoStartResolveL();

        /**

        * Processing ready.

        */

        void DoReady();

        /**

        * Performs error handling without state change.

        */

        void DoErrorWithoutStateChange();

        /**

        * Opens file by file name. If it fails with KErrPermissionDenied,

        * file is searched from message store and opened from there        

        */

        RFile OpenFileForReadingL();

    private: // data

        enum TUniProcessStates

            {

            EUniProcessImgCheck,

            EUniProcessImgProcess,

            EUniProcessImgResolve,

            EUniProcessImgReady,

            EUniProcessImgError

            };

        enum TUniProcessMethods

            {

            EUniProcessImgMethodNone        = 0x0,

            EUniProcessImgMethodScale       = 0x1,

            EUniProcessImgMethodConvert     = 0x2,

            EUniProcessImgMethodCompress    = 0x4

            };

        CMsgImageInfo*              iImageInfo;

        TMsvAttachmentId            iAttachmentId;

        TInt                        iMessageSize;

        CMsgImageInfo*              iNewImageInfo;

        RFile                       iNewImageFile;

        TMsvAttachmentId            iNewAttaId;

        CMsvStore*                  iEditStore;

        CUniImageProcessor*         iImageProcessor;

        TInt                        iProcessMethod;

        TSize                       iScaleSize;

        TSize                       iScaleSizeResult;

        TDataType                   iTargetType;

        TBool                       iExactImageScaling;

    };

#endif //__UNIEDITORPROCESSIMAGEOPERATION_H