srsf/ttscontrollerplugin/src/ttsplugindataloader.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:46:30 +0200
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/*
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* Copyright (c) 2004-2006 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:  Utility class for TTS Plugin Body to read TTP data from file.
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*
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*/
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#ifndef TTSPLUGINDATALOADER_H
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#define TTSPLUGINDATALOADER_H
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//  INCLUDES
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#include <e32std.h>
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#include <e32base.h>
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#include <f32file.h>
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#include "srsfbldvariant.hrh"
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// CLASS DECLARATION
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/**
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* Class to load TTP Data
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*
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* @lib TTSAlgorithm.lib
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*/
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class CTTSDataLoader : 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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        */
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        static CTTSDataLoader* NewL( RFs& iFs, 
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                                     TFileName& aGeneralFileName,
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                                     TFileName& aPrefixOfTTPFileName,
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                                     TFileName& aPostfixOfTTPFilename,
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                                     TFileName& aTTSFilename,
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                                     TFileName& aPostfixOfTTSFilename );
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        /**
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        * Destructor.
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        */
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        virtual ~CTTSDataLoader();
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    public: // New functions
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        /**
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        * Function to load general configuration data.
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        *
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        * @param "TInt aDataID" Identifier of data package.
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        * @return Pointer to created buffer, NULL if not found.
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        */	
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        HBufC8* LoadGeneralData( const TInt aPackageType, 
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                                 const TInt aDataID,
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                                 TUint32 aStartPosition, 
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                                 TUint32 aEndPosition );
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        /**
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        * Function to load configuration data of TTP method .
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        * 
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        * @param "TLanguage aLanguage" Language specifying which data will be loaded
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        * @return Pointer to created buffer, NULL if not found.
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        */	
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        HBufC8* LoadLanguageData( const TInt aPackageType, 
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                                  TLanguage aLanguage,
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                                  TUint32 aStartPosition, 
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                                  TUint32 aEndPosition );
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        /**
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        * Function to load TTS configuration data
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        */
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        HBufC8* LoadTtsData( const TInt aPackageType, 
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                             const TInt aDataID,
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                             TUint32 aStartPosition, 
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                             TUint32 aEndPosition );
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        /**
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        * Function to add supported languages to aLanguages
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        */
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        void GetSupportedLanguagesL( RArray<TLanguage>& aLanguages );
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    protected:
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        /**
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        * Accesses the file.
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        */
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        HBufC8* DoLoadL( TFileName& iFile,
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                         TUint32 aStartPosition, 
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                         TUint32 aEndPosition );
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    private:
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        /**
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        * C++ default constructor.
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        */
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        CTTSDataLoader( RFs& iFs, 
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                        TFileName& aGeneralFileName,
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                        TFileName& aPrefixOfTTPFileName,
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                        TFileName& aPostfixOfTTPFilename,
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                        TFileName& aTTSFilename,
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                        TFileName& aPostfixOfTTSFilename );
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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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        /**
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        * Helper function to add supported languages to aLanguages
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        */
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        void DoGetSupportedLanguagesL( RArray<TLanguage>& aLanguages,
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                                       TFileName& aMask );
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        /**
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        * Helper function to create file name
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        */        
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        void PackageName (TFileName &aFileName, TUint32 aPackageType, TUint32 aPackageID);                                       
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#ifdef __SIND_AUTOCONF_LID
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		/**
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		* Special loader for language identification data
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		* @return Pointer to the loaded data
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		*         NULL if error occurs during loading
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		*/ 
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		HBufC8* ConstructLidDataL();
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		/**
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		* Loads a file to the end of a buffer
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		* @param  aBuffer         The buffer where to load the data
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		* @param  aPackageType    Type identifier.
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		* @param  aPackageID      Identifier of package.
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		*/
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		void AppendLoadL( CBufBase *aBuffer, TUint32 aPackageType, TUint32 aPackageID );
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		/**
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		* Obtains the list of installed languages in the system and loads the corresponding data files
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		* to the buffer.
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		* @param  aBuffer         The buffer where to load the data
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		*/
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		void SysLangPackagesToBufferL( CBufBase *aBuffer );
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#endif  // __SIND_AUTOCONF_LID
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    private: // Data
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        // File name for general data
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        TFileName iGeneralFileName;
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        // Prefix of file name for ttp method data
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        TFileName iPrefixOfTTPFileName;
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        // Postfix of file name for ttp method data
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        TFileName iPostfixOfTTPFileName;
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        // TTS filename
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        TFileName iTTSFileName;
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        // Postfix of file name for tts data
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        TFileName iPostfixOfTTSFileName;
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        // File session
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        RFs& iFs;
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    };
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#endif // TTSPLUGINDATALOADER_H
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// End of File