/*

* Copyright (c) 2004-2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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 <f32file.h>

#include <apmstd.h>

#include "contentIterator.h"

#include "virtualpath.h"

#include "content.h"

#include "EmbeddedcontentIteratorBase.h"

#include "EmbeddedObject.h"

using namespace ContentAccess;

CEmbeddedContentIteratorBase* CEmbeddedContentIteratorBase ::NewL(CContent& aContent, TBool aRecursive, const TDesC8& aMimeType)

	{

	CEmbeddedContentIteratorBase* self = new (ELeave) CEmbeddedContentIteratorBase(aContent, aRecursive, aMimeType);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

void CEmbeddedContentIteratorBase::ConstructL()

	{

	// populate the array with the items at this level of the content file

	iContent.GetEmbeddedObjectsL(iEmbeddedContentObjects, EContentObject);

	iContent.GetEmbeddedObjectsL(iEmbeddedContainerObjects, EContainerObject);

	// Find the Next,  (ie. first content object)

	// This will leave if there is no object

	User::LeaveIfError(Next());

	}

CEmbeddedContentIteratorBase::CEmbeddedContentIteratorBase(CContent& aContent, TBool aRecursive, const TDesC8& aMimeType) 

	: iContent(aContent), iRecursive(aRecursive), iMimeType(aMimeType)

	{

	iContentIndex = 0;

	iContainerIndex = 0;

	}

CEmbeddedContentIteratorBase::~CEmbeddedContentIteratorBase()

	{

	delete iSubIterator;

	// Clear array 

	iEmbeddedContainerObjects.Close();

	iEmbeddedContentObjects.Close();

	}	

CEmbeddedObject& CEmbeddedContentIteratorBase::EmbeddedObject()

	{

	// The next pointer is currently on an object inside the subiterator

	if(iSubIterator)

		{

		return iSubIterator->EmbeddedObject();

		}

	else

		{	

		return *iEmbeddedContentObjects[iContentIndex - 1];

		}

	}

TInt CEmbeddedContentIteratorBase::Next()

	{

	// Must figure out if there's a constant for this

	TBuf8 <KMaxDataTypeLength> mimeType;

	TInt ret = KErrNotFound;

	// If we are already looking into a container, try finding the next in there

	if(iSubIterator)

		{

		ret = iSubIterator->Next();

		if(ret == KErrNone)

			{

			return ret;

			}

		else 

			{

			// come back to our level

			iContent.CloseContainer();

			// Delete sub-iterator

			delete iSubIterator;

			iSubIterator = NULL;

			}

		}

	// Find content objects inside this container

	for( ; iContentIndex < iEmbeddedContentObjects.Count(); iContentIndex++)

		{

		// if we don't care about mime type, this content object will do

		if(iMimeType.Length() == 0)

			{

			// make sure next time we look at the next item in our array

			iContentIndex++;

			return KErrNone;

			}

		// See if the content object has the right mime type that we are looking for

		mimeType.Copy(iEmbeddedContentObjects[iContentIndex]->MimeType());

		if(iMimeType == mimeType)

			{

			// make sure next time we look at the next item in our array

			iContentIndex++;

			return KErrNone;

			}

		// otherwise continue to next iteration, for loop incrementes iContentIndex		

		}		

	// Free memory allocated for content objects

	if(iContentIndex)

		{

		iEmbeddedContentObjects.ResetAndDestroy();

		iContentIndex = 0;

		}

	// Find content objects within nested containers

	for( ; iContainerIndex < iEmbeddedContainerObjects.Count(); iContainerIndex++)

		{

		// If it's a container look inside 

		iContent.OpenContainer(iEmbeddedContainerObjects[iContainerIndex]->UniqueId());

		TRAPD(err, iSubIterator = CEmbeddedContentIteratorBase::NewL(iContent, iRecursive, iMimeType));

		if(err == KErrNone)

			{

			// must have found something inside

			// make sure next time we search at the next item in our array

			iContainerIndex++;

			return KErrNone;

			}

		// otherwise continue to next iteration

		}

	// must be at the end of the array, ie. can't find any more content objects

	return KErrNotFound;

	}