/*

* Copyright (c) 2008-2009 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:    List utilities

*

*/

#include <glxtracer.h>                 //For logging

#include <featmgr.h>

#include <bldvariant.hrh>   // For feature constants

#include "glxlistutils.h"

// -----------------------------------------------------------------------------

// NormalizedIndex

// -----------------------------------------------------------------------------

//

TInt GlxListUtils::NormalizedIndex( TInt aIndex, TInt aListLength ) 

	{

	TRACER("GlxListUtils::NormalizedIndex");

	if ( 0 == aListLength ) 

	    {

	    return KErrNotFound;

	    }

	TInt index = aIndex % aListLength;

    if( index < 0 )

        {

        // sign for modulo is the same as left side

        // so need to add aListLength

        index += aListLength;

        }

	return index;

	}		

// -----------------------------------------------------------------------------

// VisibleItemsGranularityL

// -----------------------------------------------------------------------------

//

TInt GlxListUtils::VisibleItemsGranularityL()

    {

    TRACER("GlxListUtils::DefaultVisibleItemsGranularityL");

    //TBD: In MCL 9.1/Corolla env currently the feature flags 

    //KFeatureIdLayout640_480 and KFeatureIdLayout480_640 are not defined

    //so making the default granularity as 21 instead of 15.

    //Need to replace with KGlxDefaultVisibleItemsGranularity after

    //getting the feature flag.

    TInt ret = KGlxVGAVisibleItemsGranularity;

    if (FeatureManager::FeatureSupported( KFeatureIdLayout640_360_Touch ) || 

        FeatureManager::FeatureSupported( KFeatureIdLayout360_640_Touch ))

      {

      ret = KGlxQHDVisibleItemsGranularity;

      }

    else if(FeatureManager::FeatureSupported(KFeatureIdLayout640_480_Touch) || 

          FeatureManager::FeatureSupported(KFeatureIdLayout480_640_Touch) || 

          FeatureManager::FeatureSupported(KFeatureIdLayout640_480) || 

          FeatureManager::FeatureSupported(KFeatureIdLayout480_640))

      {

      ret = KGlxVGAVisibleItemsGranularity;

      }

    return ret;

    }