#ifndef __ALFWINDOWSTRUCTS_H__

#define __ALFWINDOWSTRUCTS_H__/*

* Copyright (c) 2008 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 <graphics/wsgraphicdrawer.h>

class RMemWriteStream;

class RMemReadStream;

/**

 * Set of Integers that can be used to idnetify all window server windows in system

 */

NONSHARABLE_STRUCT(TWindowIdentifier)

    {

    /** 

    * Constructor, for convenience 

    **/

    //Default constructor

    TWindowIdentifier() {}

    TWindowIdentifier(TInt aWindowGroupId, TInt aWindowIdentifer ):

        iWindowGroupId(aWindowGroupId), iWindowIdentifer(aWindowIdentifer){}

    TBool IsNull() const

        {

        return (!(iWindowGroupId || iWindowIdentifer)); 

        }

    TBool Equals(const TWindowIdentifier& aId) const

        {

        return ((iWindowGroupId == aId.iWindowGroupId)&&(iWindowIdentifer==aId.iWindowIdentifer)); 

        }

    TInt iWindowGroupId;            

    TInt iWindowIdentifer;          

    };

enum TAlfWServFlags

    {

    EAlfWservFlagNone,

    EAlfWservFlagDeleted = 0x1      /** Window was already deleted from wserv scene **/

    };

enum TAlfWindovEvents

    {

    EAlfWindowDestroyed = 0x1,      /** Specific window was destroyed in wserv scene **/

    EAlfWindowPosChanged = 0x2,     /** Window Position in wserv scene was changed **/

    EAlfWindowSizeChanged = 0x4,    /** Window Size in wserv scene was changed **/

    EAlfWindowNewContent = 0x8,     /** New drawing commands to InBuffer()  **/

    EAlfWindowVisibile = 0x10,      /**  window changed to visible in wserv scene **/ 

    EAlfWindowNotVisibile = 0x20,   /** window was hidden in wserv scene **/     

    EAlfWindowIndexChanged = 0x40,  /** z-order of window changed on server **/

    };

/**

 * @struct TAlfWServInfo

 *

 * The struct provides encapsulation for specific wserv window data

 * Usually this data is for reference only, e.g. effects plugin must 

 * not alter the data

 **/    

NONSHARABLE_STRUCT(TAlfWServInfo)

    {

    /** 

    * Constructors, for convenience 

    **/

    TAlfWServInfo():

        iPosition(TPoint(0,0)), 

        iSize(TSize(0,0)), 

        iRefId(TWindowIdentifier(0,0)), 

        iClientSideId(TWindowIdentifier(0,0)), 

        iFlags(EAlfWservFlagNone),

        iScreenNumber(0),

        iParentRefId(TWindowIdentifier(0,0)){}

    TAlfWServInfo(const TPoint& aPosition, const TSize& aSize, TInt aWgNodeId, 

                  TInt aWsNodeId, TInt aWsClientHandle, TInt aWgClientHandle, TUint8 aScreenNumber = 0 ):

        iPosition(aPosition), 

        iSize(aSize), 

        iRefId(TWindowIdentifier(aWgNodeId, aWsNodeId)), 

        iClientSideId(TWindowIdentifier(aWsClientHandle, aWgClientHandle)), 

        iFlags(EAlfWservFlagNone),

        iScreenNumber( aScreenNumber ){}

    TPoint iPosition; /** Window position in WServ scene **/

    TSize iSize; /** Window Size in WServ scene **/

    TWindowIdentifier iRefId; /** Unique node ids between wserv and alf **/

    TWindowIdentifier iClientSideId; /** RWindow::ClientHandle(), RWindowGroup::Identifier() **/

    TUint iFlags; 

    MWsWindowTreeNode::TType  iNodeType;

    TUint8 iScreenNumber;

    TWindowIdentifier iParentRefId; /** Unique node ids between wserv and alf **/

#ifdef ALF_DEBUG_TRACK_DRAWING	

    TBool iTrackWindow;

#endif

    /** 

    * For convenience.

    * @return Indicates whether the window still exists in WServ scene 

    **/

    TBool ExistsInWServ() const

        {

        return !((iRefId.IsNull()) ||(iFlags & EAlfWservFlagDeleted));

        }

    };

NONSHARABLE_STRUCT(TChunkHeader)

    {

    TChunkHeader( ):iReadOffset(0), iWriteOffset(0),iMemWriteStream(NULL),iMemWriteStreamUsers(0),iMemReadStream(NULL){};

    TUint32 iReadOffset;

    TUint32 iWriteOffset;

    TUint32 iCommittedWriteOffset;

    RMemWriteStream* iMemWriteStream;

    TUint8 iMemWriteStreamUsers;

    RMemReadStream* iMemReadStream;

    };

#endif