/** @file

* Copyright (c) 2005-2006 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:  UPnPAttribute implementation

*

*/

// INCLUDE FILES

#include "upnpattribute.h"

#include "upnpelement.h"

// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------

// CUpnpAttribute::ConstructL

// Symbian 2nd phase constructor can leave.

// -----------------------------------------------------------------------------

//

void CUpnpAttribute::ConstructL(const TDesC8& aName)

{

    iName = aName.AllocL();

    iValue = KNullDesC8().AllocL();

}

// -----------------------------------------------------------------------------

// CUpnpAttribute::NewLC

// Two-phased constructor.

// -----------------------------------------------------------------------------

//

EXPORT_C CUpnpAttribute* CUpnpAttribute::NewLC(const TDesC8& aName)

{

    CUpnpAttribute* self = new( ELeave ) CUpnpAttribute;

    CleanupStack::PushL( self );

    self->ConstructL(aName);

    return self;

}

// -----------------------------------------------------------------------------

// CUpnpAttribute::NewLC

// Two-phased constructor.

// -----------------------------------------------------------------------------

//

EXPORT_C CUpnpAttribute* CUpnpAttribute::NewL(const TDesC8& aName)

{

    CUpnpAttribute* self = NewLC(aName);

    CleanupStack::Pop(self);

    return self;

}    

// -----------------------------------------------------------------------------

// CUpnpAttribute::CUpnpAttribute

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

EXPORT_C CUpnpAttribute::CUpnpAttribute()

    {

    }

// Destructor

CUpnpAttribute::~CUpnpAttribute()

    {

    delete iName;

    delete iValue;	

    }

// -----------------------------------------------------------------------------

// CUpnpAttribute::SetNameL

// Sets name for the attribute.

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

EXPORT_C void CUpnpAttribute::SetNameL( const TDesC8& aName )

    {

    HBufC8* tmp = aName.AllocL();

    delete iName;

    iName = tmp;    

    }

// -----------------------------------------------------------------------------

// CUpnpAttribute::Name

// Returns name of the attribute. If null, returns KNullDesC

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

EXPORT_C const TDesC8& CUpnpAttribute::Name() const

    {

    return *iName;   

    }

// -----------------------------------------------------------------------------

// CUpnpAttribute::SetValueL

// Sets scope for the attribute.

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

EXPORT_C void CUpnpAttribute::SetValueL( const TDesC8& aValue )

    {

    HBufC8* tmp = aValue.AllocL();

    delete iValue;

    iValue = tmp;

    }

// -----------------------------------------------------------------------------

// CUpnpAttribute::Value

// Returns scope of the attribute. If null, returns KNullDesC

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

EXPORT_C const TDesC8& CUpnpAttribute::Value() const

    {

    return *iValue;

    }

// -----------------------------------------------------------------------------

// CUpnpAttribute::ExternalizeL

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

void CUpnpAttribute::ExternalizeL( RWriteStream& aStream ) const

    {

	TInt ExternalizationLength = MapItemNameToProperLength(*iName);

	SafeExternalizeL(aStream, *iName, KMaxUpnpObjStringLen);

	SafeExternalizeL(aStream, *iValue, ExternalizationLength);

    }

// -----------------------------------------------------------------------------

// CUpnpAttribute::InternalizeL

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

void CUpnpAttribute::InternalizeL( RReadStream& aStream )

    {

    delete iName;

    iName = NULL;

    iName = HBufC8::NewL( aStream, KMaxUpnpObjStringLen );

	TInt InternalizationLength = MapItemNameToProperLength(*iName);

    delete iValue;

    iValue = NULL;

    iValue = HBufC8::NewL( aStream, InternalizationLength );

    }

// -----------------------------------------------------------------------------

// CUpnpAttribute::SafeExternalizeL

// Writes safely aNumber of characters from the content to the stream.

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

void CUpnpAttribute::SafeExternalizeL(RWriteStream& aStream, const TDesC8& aDesc, const TInt aNumber) const

{	

    if( aDesc.Length() > aNumber )    

		aStream << aDesc.Mid(0, aNumber);

    else

		aStream << aDesc;    

}	

// -----------------------------------------------------------------------------

// CUpnpAttribute::MapItemNameToProperLength

// Counts how many bytes will be used for internalization

// (other items were commented in a header).

// -----------------------------------------------------------------------------

//

TInt CUpnpAttribute::MapItemNameToProperLength(TDesC8& aItemName) const

{

	// Requirement [7.3.17.4]: The following metadata properties must not exceed 256 bytes each in the XML-escaped form encoded in UTF-8:

	// - All length-unlimited DIDL-Lite schema defined attributes for <res>, except res@importUri.

	if( aItemName == _L8("importUri") )

    {

		return KMaxUpnpObjLongStringLen; //1024		

    }	

	else if( aItemName == _L8("duration") ||

			 aItemName == _L8("size") ||

		     aItemName == _L8("resolution") ||

		 	 aItemName == _L8("childCount")

	)

	{						

		return KMaxUpnpObjStringLen; // 256

	}

	else

	{

		return KMaxUpnpObjStringLen; // 256

	}

}

//  End of File