// Copyright (c) 2007-2009 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:

// CScreensaverActivityManager class

// 

//

#include "screensaveractivitymanager.h"

CScreensaverActivityManager* CScreensaverActivityManager::NewL(TInt aPriority)

	{

	CScreensaverActivityManager* self = new (ELeave) CScreensaverActivityManager(aPriority);

	CleanupStack::PushL(self);

	self->ConstructL();

	CActiveScheduler::Add(self);

	CleanupStack::Pop(self);

	return self;

	}

CScreensaverActivityManager::CScreensaverActivityManager(TInt aPriority)

	: CTimer(aPriority), iInactiveCallback(0,0), iActiveCallback(0,0), iState(EStNotActive)

	{

	}

CScreensaverActivityManager::~CScreensaverActivityManager()

	{

	}

void CScreensaverActivityManager::Start(TTimeIntervalSeconds aInterval,

		TCallBack aInactiveCallback, TCallBack aActiveCallback) 

	{  	

	iInterval = aInterval;

	iInactiveCallback = aInactiveCallback;

	iActiveCallback = aActiveCallback;

	if	(iInterval.Int() < 0)

		{

		iInterval = TTimeIntervalSeconds(0);

		}

	// Cancel outstanding timer, if any

	CTimer::Cancel();

	if (iState == EStNotActive || iState == EStMonForInactivity) 

		{

		// Begin or contine monitoring for user inactivity

		MonitorInactivity();

		}

	else 

		{

		// Continue monitoring for user activity

		Inactivity(0); 

		}

	}

void CScreensaverActivityManager::SetInactivityTimeout(TTimeIntervalSeconds aInterval)

	{

	if (iState <= EStNotActive)

    	{

    	}

	Start(aInterval, iInactiveCallback, iActiveCallback); 

	}

void CScreensaverActivityManager::MonitorInactivity()

	{

	if (User::InactivityTime() >= iInterval) 

		{

		// Already inactive enough, monitor for activity

		iState = EStMonForActivity;

		// Monitor for activity, set timer before callback to avoid missing any

		// user activity should callback take some time.

		Inactivity(0); 

		// Inform client that the inactivity interval has ended.

        (void) iInactiveCallback.CallBack();

		}

	else

		{

		// Monitor for Inactivity

		iState = EStMonForInactivity;

		Inactivity(iInterval);

		}

	}

void CScreensaverActivityManager::RunL()

	{

	if (iStatus == KErrNone)

		{

		if (iState == EStMonForInactivity) 

			{

			// Looking for Inactivity, found it

	   	    // Monitor for activity, set timer before callback to avoid missing 

		    // any user activity should callback take some time.

       		iState = EStMonForActivity;

			Inactivity(0); 

			// Inform client that the inactivity interval has ended.

 			(void) iInactiveCallback.CallBack();

			}

		else if (iState == EStMonForActivity)

			{

			// Looking for activity, found it

			// Monitor for activity unless MonitorInactivity overrides it

    		iState = EStMonForInactivity; 

			MonitorInactivity();

	        (void) iActiveCallback.CallBack();

			}	

		else

            { // Must never happen, indicates internal state of object incorrect.

            }

		}

	}

TBool CScreensaverActivityManager::IsMonitoringForActivity()

    {

    return ( iState == EStMonForActivity );

    }