/*

* Copyright (c) 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:

*

*/

#include "appiconcache.h"

CAppIconCache::~CAppIconCache()

    {

    Clear();

    }

CAppIconCache::CAppIconCache(TInt aCacheLimit) : iCache(32), iCacheLimit(aCacheLimit)

    {

    }

CAppIconCache* CAppIconCache::NewL(TInt aCacheLimit)

    {

    CAppIconCache* self = new (ELeave) CAppIconCache(aCacheLimit);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop();

    return self;

    }

void CAppIconCache::ConstructL()

    {

    }

EXPORT_C CFbsBitmap* CAppIconCache::Find(TInt64 aSerialNumber, TSize aSize)

    {

    TRasterizedBitmap rb;

    for (TInt index = 0; index < iCache.Count(); index++)

        {

        if (iCache[index].iBitmapSerial == aSerialNumber && iCache[index].iBitmap->SizeInPixels() == aSize)

            {

            // if we found a match, move the entry to the beginning of

            // the cache

            rb = iCache[index];

            iCache.Remove(index);

            iCache.Insert(rb, 0);

            return rb.iBitmap;

            }

        }

    return NULL;   

    }

EXPORT_C TInt CAppIconCache::Insert(TRasterizedBitmap& aBitmap)

    {

    TSize bitmapsize = aBitmap.iBitmap->SizeInPixels();

    // assume 32bpp for the icon

    TInt bitmapBytes = bitmapsize.iWidth*bitmapsize.iHeight*4;

    if (bitmapBytes > 128*128*4)

        {

        return KErrTooBig;

        }

    if (iCache.Count() > iCacheLimit)

        {

        // cache limit exceeded, remove

        // the least recently used entry

        delete iCache[iCache.Count()-1].iBitmap;

        iCache.Remove(iCache.Count()-1);

        }

    return iCache.Insert(aBitmap, 0);

    }

EXPORT_C void CAppIconCache::Clear()

    {

    for (TInt index = 0; index < iCache.Count(); index++)

        {

        delete iCache[index].iBitmap;

        }

    iCache.Reset();

    }