filesystemuis/memscaneng/serverinc/msengscannerbase.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 18 Jan 2010 20:09:41 +0200
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/*
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* Copyright (c) 2006 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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*     Base class for scanner classes.
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*
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*
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*/
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#ifndef MSENGSCANNERBASE_H
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#define MSENGSCANNERBASE_H
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// USER INCLUDES
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#include "mseng.hrh"
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#include "msenginfoarray.h"
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#include "msengscanobserver.h" 
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// CONSTANTS
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const TInt KDirectoryListGranularity = 10;
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// CLASS DECLARATION
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/**
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*  Base class for scanner classes.
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*  
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*/
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class CMsengScannerBase : public CActive
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    {
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    public:  // Constructors and destructor
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        /**
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        *
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        */
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        enum TStepResult
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            {
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            ECompleteRequest = 0,
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            ERequestIssuedInternally,
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            EScanComplete
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            };
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        /**
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        * C++ default constructor.
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        */
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        CMsengScannerBase(MMsengScannerObserver& aObserver, 
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            CMsengInfoArray& aInfoArray, RFs& aFsSession);
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        /**
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        * Destructor.
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        */
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        virtual ~CMsengScannerBase();
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	protected: // Internal functions
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        /**
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        * Do one incremental scanning step
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        */
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        virtual TStepResult PerformStepL() = 0;
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        /**
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        * Complete this active object's request and set it active again
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        */
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        void CompleteRequest(TInt aCode = KErrNone);
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        /**
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        * Add new value in bytes to the amount of data found with this UID.
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        * @param aUid The UID type.
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        * @param aSize The size of the file with this UID.
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        */
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        inline void AddSizeByUidL(TUidTypes aUid, TInt aSize);
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        /**
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        * Add new value in bytes to the amount of data found with this UID.
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        * @param aUid The UID type.
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        * @param aSize The size of the file with this UID.
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        */
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        inline void AddSizeByExtL(TExtTypes aExt, TInt aSize);
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        /**
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        * Query if the directory is in the list of directories to be 
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        * excluded from scanning, or is a subdirectory of one.
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        * @param aDirectory Path of the directory
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        */
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        inline TBool IsExcludedDir(const TDesC& aDirectory);
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        /**
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        * Query if the directory is in the list of directories to be 
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        * excluded from scanning, or is a subdirectory of one.
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        * @param aDirectory Path of the directory
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        */
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        inline TBool IsSpecialDir(const TDesC& aDirectory);
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        /**
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        * Access the file server session
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        */
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        inline RFs& FsSession();
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        /**
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        * Access the information array
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        */
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        inline CMsengInfoArray& InfoArray();
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        /**
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        * Access the observer of this scanner
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        */
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        inline MMsengScannerObserver& ScannerObserver();
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    private: // from CActive
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        /**
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        *
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        */
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        virtual void RunL();
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        /**
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        *
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		*/
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        virtual void DoCancel();
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        /**
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        *
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        */
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        virtual TInt RunError(TInt aError);
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    private:
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        // Prohibit copy constructor if not deriving from CBase.
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        CMsengScannerBase( const CMsengScannerBase& );
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        // Prohibit assigment operator if not deriving from CBase.
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        CMsengScannerBase& operator= ( const CMsengScannerBase& );
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    private:
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        MMsengScannerObserver& iObserver;
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        CMsengInfoArray& iInfoArray;
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        RFs& iFsSession;
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    };
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#include "msengscannerbase.inl"
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#endif      // CMSENGSCANNERBASE_H   
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// End of File