/*

* 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 <apmstd.h>

#include <msgunieditorimageprocessor.h>

#include <cmsvattachment.h>

// FORWARD DECLARATIONS

class CMsgImageInfo; 

class CMsgImageControl;

class CUniEditorDocument;

class MMsvAttachmentManager;

class CMsvStore;

// DATA TYPES

// CLASS DECLARATION

enum TUniEditorProcessImageOperationEvent

    {

    EUniEditorProcessImageOperationProcessing, 

    EUniEditorProcessImageOperationComplete,

    EUniEditorProcessImageOperationError,

    // Cancel is called for active operation

    EUniEditorProcessImageOperationCancel

    };

class MUniEditorProcessImageOperationObserver

    {

    public:

        /**

        * Notifies Image process operation result and the new file to be used

        */

        virtual void EditorOperationEvent( 

            TUniEditorProcessImageOperationEvent aEvent,

            TFileName aFileName) = 0;

    };

/**

* CUniEditorProcessImageOperation

*

* @since 3.2

*/

class CUniEditorProcessImageOperation : public CActive,

                                        public MUniImageProcessorCallback

    {

    public: // new operations

        /**

        * Factory method

        */

        static CUniEditorProcessImageOperation* NewL( 

            MUniEditorProcessImageOperationObserver &aObserver,

            RFs& aFs );

        /**

        * Start image process operation

        *

        * @param aImageInfo

        * 

        */

        void Process( CMsgImageInfo* aImageInfo);

        /**

        * Destructor

        */

        virtual ~CUniEditorProcessImageOperation();

        /**

        * Detaches image info object.

        */

        CMsgImageInfo* DetachImageInfo();

    protected:

        /**

        * From CActive

        */

        void RunL();

        /**

        * From CActive

        */

        TInt RunError( TInt aError );

        /**

        * From CActive.

        */

        void DoCancel();

        /**

        * From CUniEditorOperation

        */

        void DoCancelCleanup();

        /**

        * From MUniImageProcessorCallback

        */

        void ImageProcessingReady( TSize aBitmapSize, 

            TInt aFileSize, 

            TBool aCompressed );

    private: // new operations

        /**

        * C++ constructor

        */

        CUniEditorProcessImageOperation( 

            MUniEditorProcessImageOperationObserver &aObserver,

            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();

        /**

        * CompleteSelf

        */

        void CompleteSelf( TInt aError );

        /**

        * Sets operation pending.

        */

        void SetPending();

        /**

        * Completes operation

        */

        void CompleteOperation( TInt aError );

    private: // data

        enum TUniProcessStates

            {

            EUniProcessImgCheck,

            EUniProcessImgProcess,

            EUniProcessImgResolve,

            EUniProcessImgReady,

            EUniProcessImgError

            };

        enum TUniProcessMethods

            {

            EUniProcessImgMethodNone        = 0x0,

            EUniProcessImgMethodScale       = 0x1,

            EUniProcessImgMethodConvert     = 0x2,

            EUniProcessImgMethodCompress    = 0x4

            };

        CMsgImageInfo*              iImageInfo;

        CMsgImageInfo*              iNewImageInfo;

        RFile                       iNewImageFile;

        CUniImageProcessor*         iImageProcessor;

        TInt                        iProcessMethod;

        TSize                       iScaleSize;

        TSize                       iScaleSizeResult;

        TDataType                   iTargetType;

        TBool                       iExactImageScaling;

        TInt                        iOperationState;

        MUniEditorProcessImageOperationObserver &iObserver;

        TInt                        iMaxMmsSize;

        TInt                        iMaxImageWidth;

        TInt                        iMaxImageHeight;

        TInt                        iMmsCreationMode;

        RFs&                        iFs;

    };

#endif //__UNIEDITORPROCESSIMAGEOPERATION_H