mmsengine/inc/mmsattachmenthandler.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 02 Sep 2010 20:23:03 +0300
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/*
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* Copyright (c) 2004-2007 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:  
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*     Attachment handling helper functions functions
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*
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*/
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#ifndef MMSATTACHMENTHANDLER_H
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#define MMSATTACHMENTHANDLER_H
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// INCLUDES
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#include <e32def.h>
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#include <cmsvattachment.h> // for TMsvAttachmentId
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// CONSTANTS
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// MACROS
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// DATA TYPES
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// FUNCTION PROTOTYPES
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// FORWARD DECLARATIONS
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class CMsvStore;
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class RFs;
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class RFile;
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class TDesC8;
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class TDriveUnit;
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class CMsvMimeHeaders;
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// CLASS DECLARATION
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/**
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* Attachment handling functions that can be called from both client and
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* server side
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*
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* @lib mmsgenutil.lib
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* @since 3.2
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*/
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NONSHARABLE_CLASS( CMmsAttachmentHandler ):public CBase
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    {
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    public:  // Constructors and destructor
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        /**
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        * Two-phased constructor.
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        * @param aEntryWrapper MMS entry wrapper hiding difference between
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        *     CMsvServerEntry and CMsvEntry.
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        */
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        IMPORT_C static CMmsAttachmentHandler* NewL();
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        /**
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        * Destructor.
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        */
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        virtual ~CMmsAttachmentHandler();
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    public: // New functions
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        /**
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        * Returns total size of all attachments including mime headers
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        * and binary attachment data. Linked attachments are included
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        * This function is needed to allocate the encoding buffer.
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        * @param aStore Read store for the message entry
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        * @return combined size of all attachments, including linked attachments
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        */
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        IMPORT_C static TInt AttachmentsSizeL( CMsvStore& aStore );
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        /**
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        * Check if aFileName would be a valid filename.
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        * Cannot use path because absolute path is not known. Only filename is checked
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        * @param aFs open file system handle.
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        * @param aFileName suggestion of a filename.
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        * @return ETrue if filename is valid, EFalse if not.
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        */
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        IMPORT_C static TBool IsValidFilename( RFs& aFs, const TPtrC& aFileName );
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        /**
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        * Create attachment entry and copy specified file to binary file storage.
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        * @param aStore an open EditStore. Caller must commit store
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        *     (several attachments can be added before committing store)
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        * @param aFile opened file handle, source of the attachment.
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        *     File must be in public location to be accessible.
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        *     Caller must close the file afterwards.
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        * @param aFs File session handle. Needed to check disk space
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        * @param aMessageDrive the drive the message store is on.
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        *     (needed for disk space check)
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        * @param aMimeType mime type of the attachmet.
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        * @param aMimeHeaders mime headers for the attachment. If content type is not
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        *     defined, function adds the mime type and subtype from aMimeType
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        *     Suggested filename in mimeHeaders is used as attachment name
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        * @param aAttachmentInfo must be initialized to a CMsvAttachment::EMsvFile
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        *     on return contains data about the attachment.
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        *     Ownership of attachmentinfo is transferred to attachment manager,
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        *     it must not be deleted by caller.
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        *     Attachment manager will be destroyed when store is deleted.
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        *     After that aAttachmentInfo will no longer be available.
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        * @param aAttaId attachment id of the newly created attachment
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        */
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        IMPORT_C static void CreateAttachmentL(
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            CMsvStore& aStore,
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            RFile& aFile,
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            RFs& aFs,
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            TDriveUnit aMessageDrive,
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            TDesC8& aMimeType,
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            CMsvMimeHeaders& aMimeHeaders,
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            CMsvAttachment* aAttachmentInfo,
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            TMsvAttachmentId& aAttaId);
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        /**
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        * Create text/plain attachment. <br>
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        * Creates a text attachment from descriptor.
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        * Has option to convert all unicode paragraph separator marks to line feeds.
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        * Converts text from unicode (ucs-2) to utf-8 before storing it.
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        * @param aStore an open EditStore. Caller must commit store
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        *     (several attachments can be added before committing store)
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        * @param aAttachmentId returned ID of the new attachment entry
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        * @param aText UNICODE text to be added as a text/plain attachment.
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        * @param aFile suggested filename for the attachment
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        * @param aFs File session handle. Needed to check disk space
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        * @param aMessageDrive the drive the message store is on.
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        *     (needed for disk space check)
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        * @param aConvertParagraphSeparator flag to tell if the function 
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        *     will search for all 0x2029 characters (Unicode paragraph
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        *     separator) and replace them with 0x000a (line feed).
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        *     aConvertParagraphSeparator == ETrue: convert
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        *     aConvertParagraphSeparator == EFalse: do not convert
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        */
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        IMPORT_C static void CreateTextAttachmentL(
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            CMsvStore& aStore,
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            TMsvAttachmentId& aAttachmentId,
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            const TDesC& aText,
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            const TDesC& aFile,
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            RFs& aFs,
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            TDriveUnit aMessageDrive,
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            TBool aConvertParagraphSeparator = ETrue );
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        /**
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        * Create text/plain attachment. <br>
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        * Creates a text attachment from descriptor.
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        * Has option to convert all unicode paragraph separator marks to line feeds.
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        * Converts text from unicode (ucs-2) to utf-8 before storing it.
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        * @param aStore an open EditStore. Caller must commit store
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        *     (several attachments can be added before committing store)
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        * @param aAttachmentId returned ID of the new attachment entry
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        * @param aFile open file read handle to unicode plain text file
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        * @param aFs File session handle. Needed to check disk space
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        * @param aMessageDrive the drive the message store is on.
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        *     (needed for disk space check)
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        */
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        IMPORT_C static void CreateUTF8TextAttachmentFromFileL(
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            CMsvStore& aStore,
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            TMsvAttachmentId& aAttachmentId,
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            RFile& aFile,
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            RFs& aFs,
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            TDriveUnit aMessageDrive
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            );
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    public: // Functions from base classes
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    protected:  // New functions
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    protected:  // Functions from base classes
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    private:
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        /**
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        * C++ constructor.
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        * @param aEntryWrapper MMS entry wrapper hiding difference between
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        *     CMsvServerEntry and CMsvEntry
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        */
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        CMmsAttachmentHandler( );
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   185
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        /**
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        * Constructor.
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        */
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        void ConstructL();
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        /**
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        * Remove an attachment by attaId.
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        * Symbian synchronous attachment manager can only remove by index.
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        * 
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        * @param aAttaId id of the attachment to be removed
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        * @param aStore reference to open edit store
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        */
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        static void RemoveAttachmentL( TMsvAttachmentId aAttaId, CMsvStore& aStore );
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    };
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/**
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* Reads and writes single lines of text to or from a file.
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*
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* @lib mmsgenutil.lib
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* @since 3.2
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*/
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NONSHARABLE_CLASS ( TMmsFileText )
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	{
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public:
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	enum TFileState
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		{
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		EStartOfFile,
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		ENormal,
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		EReverse
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		};
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public:
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	TMmsFileText();
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	void Set(RFile& aFile);
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	TInt Read(TDes& aDes);
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private:
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	TInt CheckForTerminator(TBool& anAnswer);
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	TInt FillBuffer();
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private:
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	const TText* iNext;
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	const TText* iEnd;
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	TFileState iState;
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	RFile iFile;
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	TBuf8<0x100> iReadBuf; 
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	};
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#endif      // MMSATTACHMENTHANDLER_H   
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// End of File