/*

* Copyright (c) 2003-2005 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:  Header of concrete implementation class.

*

*/

#ifndef CALTERNATORIMP_H

#define CALTERNATORIMP_H

//  INCLUDES

#include "CAlternator.h"

#include "AlternatorGlobals.h"

// FORWARD DECLARATIONS

class CEikonEnv;

class RWriteStream;

class RReadStream;

class CCABrandInstallerImp;

// CLASS DECLARATION

/**

*  Concrete implementation of CAlternator.h See CAlternator.h.

*  @lib alternator.lib

*  @since 1.2s

*/

class CAlternatorImp : public CAlternator

    {

    public:  // Constructors and destructor

        /**

        * Constructor

        */

        static CAlternatorImp* NewL( const TDesC& aBrandRoot );

        /**

        * Destructor.

        */

        virtual ~CAlternatorImp();

    public: // Functions from base classes

        /**

        * From CAlternator

        */

        const TDesC& CurrentBitmapFileL( const TDesC& aModuleId,

                                         const TDesC& aAlternative,

                                         const TDesC& aBitmapFileName );

        TInt ChangeResourceL( const TDesC& aModuleId,

                              const TDesC& aAlternative,

                              const TDesC& aResFileName,

                              TInt& aResOffset );

        TInt ChangeBitmapFileL( const TDesC& aModuleId,

                                const TDesC& aAlternative,

                                const TDesC& aBitmapFileName );

        void GetCurrentResourceFileL( const TDesC& aModuleId,

                                      const TDesC& aAlternative,

                                      const TDesC& aResFileName,

                                      TDes& aFullPath );

    public: //New Functions

        /**

        * Changes root path of op branding files

        * @since 3.0

        * @param aBrandRoot, new root path

        */

        void SetBrandRoot( const TDesC& aBrandRoot );

    private:

        /**

        * Changes the resource file.

        * @since 1.2s

        * @param aModuleId, dll's (or app) id. For example "IM".

        * @param aAlternative, id for alternative

        *                      (for example operator "Oper1" ) files.

        * @param aResFileName,resource file's name.

        * @param aResOffSet,reference to resource offset

        * @return Returns error code if something went wrong.

        *         Leaves on OOM situations.

        */

        TInt LoadResourceFileL( const TDesC& aModuleId, const

                                TDesC& aAlternative,

                                const TDesC& aResFileName,

                                TInt& aResOffSet );

        /**

        * Checks if the path&file exists.

        * @param aCheckThis, path to be checked.

        * @since 1.2s

        */

        TBool IsPathOk( const TDesC& aCheckThis ) const;

        /**

        * Constructs complete path from parts and checks for correctness.

        * @param aResult, the complete path.

        * @param aModuleId, dll's (or app) id. For example "IM".

        * @param aAlternative, id for alternative

        *                     (for example operator "Oper1" ) files.

        * @param aFileName, filename of the complete path

        * @return KErrNone if path was found from C or MMC card,

        *         otherwise error is returned

        * @since 1.2s

        */

        TInt ConstructCompletePathAndCheck( TDes& aResult,

                                            const TDesC& aModuleId,

                                            const TDesC& aAlternative,

                                            const TDesC& aFileName );

    private:

        /**

        * C++ default constructor.

        */

        CAlternatorImp();

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL( const TDesC& aBrandRoot );

    private:    // Data

        // Pointer to eikon environment

        CEikonEnv* iEikEnv;

        // Current bitmap path

        TFileName iCurrentBitmap;

        // Root for branding files like: c:\system\data\branding\

        // owned

        HBufC* iBrandRoot;

        CCABrandInstallerImp* iBrandInstaller;

    };

#endif      // CALTERNATORIMP_H

// End of File