/*

* Copyright (c) 2007 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:  BS Server - implemenration of CServer2 

 *

*/

#ifndef C_CBSSERVER_H

#define C_CBSSERVER_H

// INCLUDES

#include <eikenv.h>

#include <eikappui.h>

#include "bspanic.h"

class CBSEngine;

/**

 * Back Stepping server implementation

 *

 * @since Series 60 3.2

 */

class CBSServer : public CServer2

    {

    /**

     * EIkonEnv for the server process.

     *

     * @since Series 60 3.2

     */

    class CBSEikonEnv : public CEikonEnv

        {

    public:

        void DestroyEnvironment();

        void ConstructL();

        };

    /**

     * EikAppUi for the server process.

     * Inform engine if focused application was changed

     *

     * @since Series 60 3.2

     */

    class CBSAppUi : public CEikAppUi

        {

    public:

        ~CBSAppUi();

        void ConstructL();

        void HandleWsEventL( const TWsEvent& aEvent,

            CCoeControl* aDestination );

        void ForwardEventL( const TWsEvent& aEvent );

        CBSEngine* iEngine;

        };

public:

    static CBSServer* NewLC();

    /**

     * Destructor.

     */

    virtual ~CBSServer();

    /**

     * Return the reference to the engine.

     *

     * @since Series 60 3.2

     * @return engine reference

     */

    CBSEngine& Engine();

    /**

     * Increment session count

     *

     * @since Series 60 3.2     

     */

    void IncrementSessions();

    /**

     * Decrement session count

     * Stops server if last session was closed

     * @since Series 60 3.2

     */

    void DecrementSessions();

    /**

     * First stage startup for the server thread. 

     *

     * @since Series 60 3.2

     * @return return KErrNone or panics thread

     */

    static TInt ThreadFunction();

    /**

     * Panic client. 

     *

     * @since Series 60 3.2

     * @param aMessage RMessage2

     * @param aPanic panic code

     */

    static void PanicClient( const RMessage2& aMessage, 

        TBSEnginePanic aPanic );

protected:

    // from base class CActive

    /**

     * From CActive.

     * Process any errors.

     *

     * @since Series 60 3.2

     * @param aError the leave code reported

     * @return return KErrNone if leave is handled

     */

    TInt RunError( TInt aError );

private:

    /**

     * Constructs the server. 

     *

     * @since Series 60 3.2

     * @param aPriority CServer2 input parameter

     */

    CBSServer( TInt aPriority );

    void ConstructL();

    /**

     * Panic the server. 

     *

     * @since Series 60 3.2

     * @param aPanic the panic code

     */

    static void PanicServer( TBSEnginePanic aPanic );

    /**

     * Second stage startup for the server thread.

     *

     * @since Series 60 3.2

     */

    static void ThreadFunctionL();

    /**

     * Create a  server session, and return a pointer to the created object.

     * @param aVersion the client version 

     * @param aMessage RMessage2 

     * @return pointer to new session

     */

    CSession2* NewSessionL( const TVersion& aVersion,

        const RMessage2& aMessage ) const;

private:

    // data

    /**

     * Instance of engine

     * Own.

     */

    CBSEngine* iEngine;

    /*

     * Session count

     */

    TInt iSessionCount;

    };

#endif // C_CBSSERVER_H