/*

* Copyright (c) 2005-2007 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:  Transaction factory implementation

*

*/

#ifndef C_TRANSACTIONFACTORYIMPL_H

#define C_TRANSACTIONFACTORYIMPL_H

#include <e32base.h>

#include "transactionfactory.h"

namespace AiUtility

    {

    class CContentPriorityMap;

    }

namespace AiXmlUiController

{

class CTransaction;

class CTransactionElement;

class CCssPropertyMap;

/**

*  @ingroup group_xmluicontroller

* 

*  CTransactionFactoryImpl implements MTransactionFactory.

*  It provides a recycling pool of transaction objects.

*

*  @lib AiXmlUiMain

*/

class CTransactionFactoryImpl: public CBase, public MTransactionFactory

    {

public:  // Constructors and destructor

    static CTransactionFactoryImpl*

        NewL( AiUtility::CContentPriorityMap& aContentPriorityMap,

              CCssPropertyMap& aPropertyMap );

    virtual ~CTransactionFactoryImpl();

// Functions from MTransactionFactory

    MTransaction* CreateTransactionL( TInt aTxId );

    void ReleaseTransaction( MTransaction* aTransaction );

    MTransactionElement* CreateTextTransactionElementL( CXnNodeAppIf& aTarget,

                                                        const TDesC& aText,

                                                        TInt aPriority );

    MTransactionElement* CreateDataBufferTransactionElementL( 

                                                        CXnNodeAppIf& aTarget,

                                                        const TDesC8& aData,

                                                        TInt aPriority );

    MTransactionElement* CreateEmptyContentTransactionElementL( CXnNodeAppIf& aTarget,

                                                                TInt aIndex );

    MTransactionElement* CreateImageTransactionElementL( CXnNodeAppIf& aTarget,

                                                         CGulIcon* aIcon,        

                                                         TInt aPriority );

    MTransactionElement* CreateImageTransactionElementL( CXnNodeAppIf& aTarget,

                                                         RFile& aFile,

                                                         TInt aPriority );

    /**

     * @param aTarget

     * @param aText new text

     * @param aPriority

     * @param aIndex Index of the news ticker element updated

     */

    MTransactionElement* CreateNewsTickerTransactionElementL( CXnNodeAppIf& aTarget,

                                                        const TDesC& aText,

                                                        TInt aPriority,

                                                        TInt aIndex );

    void ReleaseTransactionElement( MTransactionElement* aElement );

    TBool IsSupported( CXnNodeAppIf& aTarget, const TDesC8& aContentType );

private: // Construction

    CTransactionFactoryImpl(

        AiUtility::CContentPriorityMap& aContentPriorityMap,

        CCssPropertyMap& aPropertyMap );

    void ConstructL();

    template<class T> T* NewInstanceL();

// New methods    

    void DeleteTransactionList( TSglQue< CTransaction >& aList );

    void DeleteElementList( TSglQue< CTransactionElement >& aList );

private: // Data

    /**

     * List of available transactions.

     */

    TSglQue< CTransaction > iAvailableTransactions;

    /**

     * List of reserved transactions.

     */

    TSglQue< CTransaction > iReservedTransactions;

    /**

     * List of available transaction elements.

     */

    TSglQue< CTransactionElement > iAvailableElements;

    /**

     * List of reserved transaction elements.

     */

    TSglQue< CTransactionElement > iReservedElements;

    /**

     * Reference to UI controller's content priority map

     */

    AiUtility::CContentPriorityMap& iContentPriorityMap;

    /**

     * UI controller's CSS property map. Not own.

     */

    CCssPropertyMap& iPropertyMap;

    };

} // namespace AiXmlUiController

#endif      // C_TRANSACTIONFACTORYIMPL_H  

//  End of File