browserui/browser/FeedsInc/FeedsFileSearchAgent.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:47:18 +0200
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/*
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* Copyright (c) 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 the License "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:  File search utility active agent for use within browser ui
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*
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*/
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#ifndef CFEEDSFILESEARCHAGENT_H
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#define CFEEDSFILESEARCHAGENT_H
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//  INCLUDES
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#include <e32base.h>
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#include <f32file.h>
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// CONSTANTS
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// MACROS
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// FUNCTION PROTOTYPES
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#define FEEDS_FILE_SEARCH_AGENT_MAX_RESULTS 64
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// FORWARD DECLARATIONS
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// CLASS DECLARATION
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// DATA TYPES
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// CLASS DECLARATION
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/**
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* Encapsulate drive entry info
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* @since 3.2
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*/
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class TDriveEntry
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	{
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public:
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    TChar           iLetter;
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    TInt            iNumber;
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	};
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/**
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* Encapsulate File entry info
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* @since 3.2
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*/
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class TFileEntry
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	{
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public:
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    TFileName       iPath;
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    TEntry          iEntry;
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	};
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typedef CArrayFixSeg<TDriveEntry> CDriveEntryList;
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typedef CArrayFixSeg<TFileEntry> CFileEntryList;
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/**
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* A Callback mixin for search Agent
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* @since 3.2
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*/
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class MFeedsFileSearchAgentCallback
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	{
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	public:
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		virtual void FeedsFileSearchCompleteL(TInt aCount) = 0;
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	};
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// CLASS DECLARATION
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/**
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* An Active Agent used to search the filesystem for feeds files
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* @since 3.2
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*/
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class CFeedsFileSearchAgent : public CBase
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	{
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	public: // Constructor & destructor
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        /**
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        * Two-phased constructor.
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        */
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        static CFeedsFileSearchAgent* NewL(MFeedsFileSearchAgentCallback& aCallback);
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        /**
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        * Destructor.
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        */
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        virtual ~CFeedsFileSearchAgent();
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	public: // New Functions
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		/**
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		* Once the search agent has been setup via its constructor, begin
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		* the search process
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		* @since 3.2
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		* @return void
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		*/	
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		void StartSearchingL();
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		/**
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		* After the search has completed, allows client to retrieve a 
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		* File entry pointer corresponding to the passed-in index
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		* @since 3.2
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		* @return File entry pointer or NULL if invalid index
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		*/
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		TFileEntry* GetFileEntry(const TInt aIndex);
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	private: // Search Functions
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		/**
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		* Populate the list of available drives on the phone within this class
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		* @since 3.2
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		*/
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		void GetDriveListL();
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		/**
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		* Given a directory, search for a wildcard-included filename within
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		* that directory
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		* @since 3.2
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		* @param a filename, a path
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		*/ 
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		TInt DoSearchFiles(const TDesC& aFileName, const TDesC& aPath);
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		/**
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		* Given a directory, search recursively for a wildcard-included filename
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		* within the hierarchy below that directory
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		* @since 3.2
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		* @param a filename, a path
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		*/
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		TInt DoSearchFilesRecursive(const TDesC& aFileName);
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	private:
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        /**
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        * C++ constructor.
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        */
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        CFeedsFileSearchAgent(MFeedsFileSearchAgentCallback& aCallback);
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        /**
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        * By default Symbian 2nd phase constructor is private.
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        */
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        void ConstructL();        
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    public:
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        /**
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         * This method is a call back;
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         *
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         * @since 7.1
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         * @return The TBool.
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         */
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        static TBool LazyCallBack(TAny* aPtr);
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         /**
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         * This method Cancels the ongoing search;
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         *
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         * @since 7.1
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         * @return Void.
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         */
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        void CancelSearch();
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        /**
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         * This method Starts the search;
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         *
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         * @since 7.1
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         * @return TBool.
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         */
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        TBool StartSearchFile();
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    private:    // Data
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		RFs									iFs;
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        MFeedsFileSearchAgentCallback*		iCallback;           // not owned (callee owns)
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        CDriveEntryList* 		          	iDriveEntryList;     // owned
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        TInt								iSearchDriveIndex;
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        CFileEntryList*						iFileEntryList;		 // owned
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        TBool								iCancelSearch;
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        CIdle*                              iLazyCaller;
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        CDirScan*                           iScan;
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	};
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#endif      // CFEEDSFILESEARCHAGENT_H
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// End of File