windowing/windowserver/nga/remotegc/FontsCache.cpp
changeset 0 5d03bc08d59c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/windowing/windowserver/nga/remotegc/FontsCache.cpp	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,94 @@
+// Copyright (c) 2006-2009 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:
+//
+
+#include "FontsCache.h"
+
+NONSHARABLE_CLASS(CCachedFont) : public CFbsFont
+	{
+public:
+	CCachedFont();
+	~CCachedFont();
+	
+	TInt Duplicate(TInt aHandle); //lint !e1511
+	};
+	
+CCachedFont::CCachedFont()
+	{		
+	}
+	
+CCachedFont::~CCachedFont()
+	{		
+	}
+	
+TInt CCachedFont::Duplicate(TInt aHandle)
+	{
+	return CFbsFont::Duplicate(aHandle);
+	}
+
+CFontsCache::CFontsCache() : CCacheBase()
+	{	
+	}
+
+CFontsCache::~CFontsCache()
+	{	
+	}
+
+/**
+Enables the use of a cached font with a specified handle.
+If no font with this handle is cached, the font is created and cached.
+
+@return KErrNone if no problem occured, otherwise a systemwide error.
+*/	
+TInt CFontsCache::UseL(TInt aHandle)
+	{
+	TCacheEntry entry(aHandle);
+	TInt index = iCachedItems.FindInUnsignedKeyOrder(entry);
+	if(index != KErrNotFound)
+		{
+		iCachedItems[index].iIsUsed = ETrue;
+		return KErrNone;	
+		}
+		
+	entry.iCachedItem = new (ELeave) CCachedFont;	
+	TInt err = static_cast<CCachedFont*>(entry.iCachedItem)->Duplicate(aHandle);
+	if(err)
+		{
+		delete entry.iCachedItem;
+		// coverity[extend_simple_error]
+		return err;
+		}
+	
+	entry.iIsUsed = ETrue;		
+	CleanupStack::PushL(entry.iCachedItem);
+	iCachedItems.InsertInUnsignedKeyOrderL(entry);
+	CleanupStack::Pop(entry.iCachedItem);
+	return KErrNone;
+	}
+
+/**
+Returns a font from the cache corresponding to a specific handle.
+
+@param aHandle A handle to match against a font in the cache.
+@return The font that matches the handle provided as a parameter.
+*/	
+const CFont* CFontsCache::Resolve(TInt aHandle)
+	{	
+	const CBase* item = CCacheBase::Resolve(aHandle);
+	if(item != NULL)
+		return static_cast<const CCachedFont*>(item);
+	else
+		return NULL;
+	}
+