// Copyright (c) 2007-2010 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:

// Handler implementation for ascii printf

//

#ifndef __TRACECOREPRINTFTRACEHANDLER_H__

#define __TRACECOREPRINTFTRACEHANDLER_H__

// Include files

#include <kernel/kernel.h>

#include <TraceCoreNotificationReceiver.h>

#include "TraceCoreHandler.h"

// Forward declarations

class DTraceCoreWriter;

class DTraceCoreSettings;

/**

 * Handler implementation for ascii printf

 */

NONSHARABLE_CLASS( DTraceCorePrintfTraceHandler ) : public MTraceCoreNotificationReceiver, 

													public DTraceCoreHandler

    {

public:

	/**

     * Constructor

     */

    DTraceCorePrintfTraceHandler();

    /**

     * Destructor

     */

    ~DTraceCorePrintfTraceHandler();

    /**

     * Initializes this handler

     */

    TInt Init();

    /**

     * Prepares the change in writer

     * 

     * @param aWriter the new writer

     */

    void PrepareSetWriter( DTraceCoreWriter* aWriter );

    /**

     * Kern/RDebug::Printf handler function

     */

    static TBool PrintfHandler( const TDesC8& aText, TTraceSource aTraceSource );

    /**

     * Callback function for Trace Activation

     * from MTraceCoreNotificationReceiver

     * 

     * @param aComponentId

     * @param aGroupId

     * @return None          

     */

    void TraceActivated( TUint32 aComponentId, TUint16 aGroupId  );

    /**

     * Callback function for Trace Deactivation

     * from MTraceCoreNotificationReceiver

     * 

     * @param aComponentId

     * @param aGroupId

     * @return None     

     */

    void TraceDeactivated( TUint32 aComponentId, TUint16 aGroupId  );

private:

    /**

     * Checks if there is a dropped trace and sends dropped trace message and

     * normal trace as well if writer is ready to write that data.

     *

     * @param aHandler Printf trace handler

     */

    inline static void HandleTrace(const TDesC8& aText);    

    /**

     * Trace output function

     */

	void DebugPrint( const TDesC8& aDes );

    /**

     * Static instance, accessed from the printf trace handler callback

     */

    static DTraceCorePrintfTraceHandler* iInstance;

    /**

     * Printf trace handler

     */

    TBool ( *iPrintfHandler )( const TDesC8&, TTraceSource );

    /**

	 * State of the Printf activations

 	 */

	static TBool iKernPrintfActive;

	static TBool iRDebugPrintfActive;

	static TBool iPlatSecPrintfActive;

    };

#endif

// End of File