/*

* 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);

	}