// Copyright (c) 2004-2009 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:

// Implementation of class CFlowControlChange

// 

//

/**

 @file

*/

#include <e32property.h>

#include "LoopbackConfig.h"

#include "FlowControlChange.h"

CFlowControlChange* CFlowControlChange::NewL(TUint aUnit, MFlowControlChangeCallBack* aCallback)

	{

	CFlowControlChange* self = new (ELeave) CFlowControlChange(aUnit, aCallback);

	return self;

	}

CFlowControlChange::CFlowControlChange(TUint aUnit, MFlowControlChangeCallBack* aCallback)

	: CActive(EPriorityStandard), iCallback(aCallback), iUnit(aUnit), iFlowControlIsOn(EFalse)

	{

	CActiveScheduler::Add(this);

	TBool flowControlIsOn = EFalse;

	iProperty.Attach(KUidPSCsyFlowControlCategory, iUnit);

	iProperty.Subscribe(iStatus);

	TInt ret = RProperty::Get(KUidPSCsyFlowControlCategory, iUnit, flowControlIsOn);

	if (ret == KErrNone)

		iFlowControlIsOn = flowControlIsOn;

	SetActive();

	}

CFlowControlChange::~CFlowControlChange()

	{

	Cancel();

	iProperty.Close();

	}

/** 

 @return ETrue if flow control is currently on, EFalse if it is not

 */

TBool CFlowControlChange::FlowControlIsOn() const

	{

	return iFlowControlIsOn;

	}

/**

 Stops listening for changes to flow control

 */

void CFlowControlChange::DoCancel()

	{

	iProperty.Cancel();

	}

/**

 Notifies the callback of a change in flow control, and resubscribes to obtain future notifications of property changes

 */

void CFlowControlChange::RunL()

	{

	User::LeaveIfError(KErrNone);	// To prevent LeaveScan warning

	// Resubscribe before retrieving the value so we don't miss any changes

	TInt status = iStatus.Int();

	iProperty.Subscribe(iStatus);

	SetActive();

	TBool flowControlIsOn = EFalse;

	if(status == KErrNone)

		{

		RProperty::Get(KUidPSCsyFlowControlCategory, iUnit, flowControlIsOn);

		}

	if (flowControlIsOn != iFlowControlIsOn)

		{

		iFlowControlIsOn = flowControlIsOn;

		if (iFlowControlIsOn)

			iCallback->StartFlowControl();

		else

			iCallback->StopFlowControl();

		}

	}