sl@0: // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include "FontsCache.h"
sl@0: 
sl@0: NONSHARABLE_CLASS(CCachedFont) : public CFbsFont
sl@0: 	{
sl@0: public:
sl@0: 	CCachedFont();
sl@0: 	~CCachedFont();
sl@0: 	
sl@0: 	TInt Duplicate(TInt aHandle); //lint !e1511
sl@0: 	};
sl@0: 	
sl@0: CCachedFont::CCachedFont()
sl@0: 	{		
sl@0: 	}
sl@0: 	
sl@0: CCachedFont::~CCachedFont()
sl@0: 	{		
sl@0: 	}
sl@0: 	
sl@0: TInt CCachedFont::Duplicate(TInt aHandle)
sl@0: 	{
sl@0: 	return CFbsFont::Duplicate(aHandle);
sl@0: 	}
sl@0: 
sl@0: CFontsCache::CFontsCache() : CCacheBase()
sl@0: 	{	
sl@0: 	}
sl@0: 
sl@0: CFontsCache::~CFontsCache()
sl@0: 	{	
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Enables the use of a cached font with a specified handle.
sl@0: If no font with this handle is cached, the font is created and cached.
sl@0: 
sl@0: @return KErrNone if no problem occured, otherwise a systemwide error.
sl@0: */	
sl@0: TInt CFontsCache::UseL(TInt aHandle)
sl@0: 	{
sl@0: 	TCacheEntry entry(aHandle);
sl@0: 	TInt index = iCachedItems.FindInUnsignedKeyOrder(entry);
sl@0: 	if(index != KErrNotFound)
sl@0: 		{
sl@0: 		iCachedItems[index].iIsUsed = ETrue;
sl@0: 		return KErrNone;	
sl@0: 		}
sl@0: 		
sl@0: 	entry.iCachedItem = new (ELeave) CCachedFont;	
sl@0: 	TInt err = static_cast<CCachedFont*>(entry.iCachedItem)->Duplicate(aHandle);
sl@0: 	if(err)
sl@0: 		{
sl@0: 		delete entry.iCachedItem;
sl@0: 		// coverity[extend_simple_error]
sl@0: 		return err;
sl@0: 		}
sl@0: 	
sl@0: 	entry.iIsUsed = ETrue;		
sl@0: 	CleanupStack::PushL(entry.iCachedItem);
sl@0: 	iCachedItems.InsertInUnsignedKeyOrderL(entry);
sl@0: 	CleanupStack::Pop(entry.iCachedItem);
sl@0: 	return KErrNone;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Returns a font from the cache corresponding to a specific handle.
sl@0: 
sl@0: @param aHandle A handle to match against a font in the cache.
sl@0: @return The font that matches the handle provided as a parameter.
sl@0: */	
sl@0: const CFont* CFontsCache::Resolve(TInt aHandle)
sl@0: 	{	
sl@0: 	const CBase* item = CCacheBase::Resolve(aHandle);
sl@0: 	if(item != NULL)
sl@0: 		return static_cast<const CCachedFont*>(item);
sl@0: 	else
sl@0: 		return NULL;
sl@0: 	}
sl@0: