/*

 * Copyright (c) 1995-2010 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 "T_IsolatedFontStore.h"

 #include <graphics/openfontrasterizer.h>

 #include <graphics/openfontconstants.h>

 CTIsolatedFontStore::CTIsolatedFontStore():iIsHeapOwner(ETrue)

 	{

 	}

 CTIsolatedFontStore::CTIsolatedFontStore(RHeap* aHeap):iIsHeapOwner(EFalse),iHeap(aHeap)

     {

     }

 CTIsolatedFontStore::~CTIsolatedFontStore()

 	{

 	delete iFs;

 	if (iIsHeapOwner && iHeap)

 	    {

 	    iHeap->Close();

 	    }

 	REComSession::FinalClose();

 	}

 CTIsolatedFontStore* CTIsolatedFontStore::NewLC()

 	{

 	CTIsolatedFontStore* self = new (ELeave)CTIsolatedFontStore();

 	CleanupStack::PushL(self);

 	self->ConstructL();

 	return self;

 	}

 CTIsolatedFontStore* CTIsolatedFontStore::NewL()

 	{

 	CTIsolatedFontStore* self=CTIsolatedFontStore::NewLC();

 	CleanupStack::Pop(); // self;

 	return self;

 	}

 CTIsolatedFontStore* CTIsolatedFontStore::NewLC(RHeap * aHeap)

     {

     CTIsolatedFontStore* self = new (ELeave)CTIsolatedFontStore(aHeap);

     CleanupStack::PushL(self);

     self->ConstructL();

     return self;

     }

 CTIsolatedFontStore* CTIsolatedFontStore::NewL(RHeap * aHeap)

     {

     CTIsolatedFontStore* self=CTIsolatedFontStore::NewLC(aHeap);

     CleanupStack::Pop(); // self;

     return self;

     }

 void CTIsolatedFontStore::ConstructL()

 	{

     if(iIsHeapOwner)

         {

         iHeap = UserHeap::ChunkHeap(NULL,0x10000,0x10000);

         }	

 	iFs = CFontStore::NewL(iHeap);

 	}

 /**

 Load all available font rasterizers and install to the instance of CFontStore

 this class contains.

 @pre This function hasn't previously been called on this object

 @post All rasterizers located and successfully loaded will be available for use

  */

 void CTIsolatedFontStore::LoadRasterizersL()

 	{

 	RImplInfoPtrArray implementationArray;

 	TUid uid = {KUidOpenFontRasterizerPlunginInterface};

 	// get implementation list

 	ListImplementationsWithRetry(uid, implementationArray, EFalse);

 	const TInt availCount = implementationArray.Count();

 	for (TInt count=0; count < availCount; ++count)

 		{

 		const CImplementationInformation* info = implementationArray[count];

 		// Create & install a rasterizer

 		// ignore Leaves, as any necessary cleanup will have already been done through the cleanup stack

 		TRAP_IGNORE(SafeInstallOfRasterizerL(info->ImplementationUid()));

 		}

 	// free memory

 	implementationArray.ResetAndDestroy();

 	}

 /**

 Helper function from CFbTop to List all available rasterizers.

 @param aInterfaceUid The UID of the ECOM plugin

 @param aImplementationArray An array to store the found plugins

 @param aRomOnly If ETrue only ROM plugins are returned, otherwise all drives are searched

 */

 void CTIsolatedFontStore::ListImplementationsWithRetry(TUid& aInterfaceUid, RImplInfoPtrArray &aImplementationArray, TBool aRomOnly)

 	{

 	// Making sure that no race situation arises between FBserv and Ecom

 	// If ECom is not ready, give it another chance and try again. if it still doesn't work 

 	// after the third try, then it just carries on quietly and fails... 

 	for (TInt ecomnotready =0; ecomnotready <3; ecomnotready++)

 		{

 		TInt ecomError = KErrNone;

 		if (aRomOnly)

 			{

 			TEComResolverParams resParams;

 			TRAP(ecomError, REComSession::ListImplementationsL(aInterfaceUid, resParams, KRomOnlyResolverUid, aImplementationArray));

 			}

 		else

 			{ // default resolver

 			TRAP(ecomError, REComSession::ListImplementationsL(aInterfaceUid, aImplementationArray));

 			}

 		if (!ecomError)

 			{

 			return;

 			}

 		else

 			{

 			User::After(0);

 			}

 		}

 	}

 /**

 Installs the rasterizer with the specified interface UID.

 @param aInterfaceImplUid The UID of the rasterizer to be installed.

 @see CFbTop::SafeInstallOfRasterizerL

  */

 void CTIsolatedFontStore::SafeInstallOfRasterizerL(TUid aInterfaceImplUid)

 	{

 	COpenFontRasterizer* rasterizer = COpenFontRasterizer::NewL(aInterfaceImplUid);

 	CleanupStack::PushL(rasterizer);

 	// Install it in the font store.

 	iFs->InstallRasterizerL(rasterizer);

 	CleanupStack::Pop(rasterizer);

 	}