idlehomescreen/xmluicontroller/inc/databuffertransactionelement.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:40:49 +0200
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/*
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* Copyright (c) 2005-2007 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Data buffer transaction
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*
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*/
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#ifndef C_DATABUFFERTRANSACTIONELEMENT_H
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#define C_DATABUFFERTRANSACTIONELEMENT_H
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#include "transactionelement.h"
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namespace AiUtility
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    {
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    class CContentPriorityMap;
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    }
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class CXnNodeAppIf;
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namespace AiXmlUiController
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{
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/**
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 *  @ingroup group_xmluicontroller
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 * 
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 * CDataBufferTransactionElement corresponds one text content publishing operation.
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 *
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 *  @lib AiXmlUiMain
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 */
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class CDataBufferTransactionElement : public CTransactionElement
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    {
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public:  // Constructors and destructor
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    static CDataBufferTransactionElement*
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        NewL( AiUtility::CContentPriorityMap& aContentPriorityMap );
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    virtual ~CDataBufferTransactionElement();
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// New functions
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    /**
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    * Initializes this transaction element to publish content aData
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    * to node aTarget.
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    *
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    * @param aTarget - the target of publishing.
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    * @param aData - the content. 
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    */
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    void InitializeL(CXnNodeAppIf& aTarget, const TDesC8& aData);
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    /**
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     * Checks if given content type is supported by target ui element.
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     *
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     * @param aTarget target ui element.
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     * @param aContentType content type
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     * @return ETrue if content type is supported
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     */
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    static TBool IsSupported( CXnNodeAppIf& aTarget,
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                              const TDesC8& aContentType );
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// Functions from CTransactionElement
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    void Reset();
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    void UpdateDataL();
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private:
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    CDataBufferTransactionElement(
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        AiUtility::CContentPriorityMap& aContentPriorityMap );
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    void CheckTypeL( CXnNodeAppIf& aTarget );
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    void SetDataL();
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private:    // Data
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    /**
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     * New content.
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     */
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    TPtrC8 iNewData;
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    };
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}   // namespace AiXmlUiController
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#endif      // C_TEXTTRANSACTIONELEMENT_H  
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//  End of File