cbs/CbsServer/ClientInc/RCbsTopicList.h
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:15:03 +0100
branchRCL_3
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permissions -rw-r--r--
Revert incorrect RCL_3 drop: Revision: 201033 Kit: 201035
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/*
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* Copyright (c) 2003 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:  This file contains the header file of the RCbsTopicList class
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*    
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*                RCbsTopicList provides an interface to CBS clients which
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*                allows accessing the Cell Broadcast topics stored
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*                in the CBS Server. Note: This class should not be directly 
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*                accessed by the client application.
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*
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*                Services include accessing and modifying topic information,
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*                deleting a single or all topics, and a notification service,
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*                that enables the client to receive notifications on 
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*                events modifying the server's topic list.
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*
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*
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*/
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#ifndef     RCBSTOPICLIST_H
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#define     RCBSTOPICLIST_H
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// INCLUDES
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#include <e32base.h>
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#include "CbsCommon.h"
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// FORWARD DECLARATIONS
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class RCbs;
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// CLASS DECLARATION 
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/**
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*   This class represents the client-side subsession to handle topic lists.
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*/
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class RCbsTopicList 
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        : public RSubSessionBase
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    {
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    public:     // New functions
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        /**
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        *   Constructor.
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        */
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        RCbsTopicList();
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        /**
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        *   Creates a subsession to the server. Before using any other method it
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        *   must be called.
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        *   @param aServer      It is the cbs server.
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        *   @return             Error code.
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        */
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        TInt Open( RCbs& aServer );
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        /**
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        *   Closes the subsession and connection to the server.
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        *
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        *   @return             Error code.
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        */
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        TInt Close();
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        /**
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        *   Returns the total amount of topics the topic list contains.
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        *
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        *   @param aCount       It will contain the total amount of topics.
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        */
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        void GetTopicCount( TInt& aCount );
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        /**
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        *   Returns information about a topic from the topic list.
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        *
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        *   @param aIndex       It is the index to the topic.
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        *   @param aTopic       It will contain the topic information.
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        *   @return             Error code.
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        */
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        TInt GetTopic( const TInt aIndex, TCbsTopic& aTopic );
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        /**
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        *   Finds the topic by given number.
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        *
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        *   @param aNumber      It is the number of the topic.
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        *   @param aTopic       It will contain the topic information.
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        *   @return             Error code.
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        */
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        TInt FindTopicByNumber( TCbsTopicNumber aNumber, TCbsTopic& aTopic );
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        /** 
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        *   Deletes an existing topic.
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        *
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        *   Note that the topic must exists.
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        *
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        *   @param aNumber      It is the handle to the topic to be deleted.
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        *   @return             Error code.
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        */
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        TInt DeleteTopic( TCbsTopicNumber aNumber );
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        /**
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        *   Delete all topics.
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        *
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        *   @return             Error code.
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        */
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        TInt DeleteAllTopics();
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        /**
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        *   Adds a new topic.
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        *
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        *   Note that the number of the new topic must be unused.
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        *
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        *   @param aTopic       It contains the information of the new topic.
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        *   @return             Error code.
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        */
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        TInt AddTopic( TCbsTopic& aTopic );
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   123
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        /**
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        *   Changes the name and number of the existing topic.
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        *
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        *   Note that the changing fails in case there is another topic with the new topic number.
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        *   It also fails if the topic is protected.
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        *
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        *   @param  aOldNumber     Old topic number
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        *   @param  aNewNumber     New topic number
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        *   @param  aName       It is the new name of the topic.
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        *   @return             Error code.
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        */  
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        TInt ChangeTopicNameAndNumber( 
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             TCbsTopicNumber aOldNumber,
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             TCbsTopicNumber aNewNumber, 
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             const TCbsTopicName& aName );
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        /**
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        *   Changes topic subscription status.
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        *
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        *   @param  aNumber     Number of the topic
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        *   @param  aNewStatus  It is the new subscription status.
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        *   @return             Error code.
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        */
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        TInt ChangeTopicSubscriptionStatus( TCbsTopicNumber aNumber, 
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             TBool aNewStatus );
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        /**
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        *   Changes topic hotmark status.
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        *
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        *   @param  aNumber     Number of the topic
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        *   @param  aNewStatus  It is the new hotmark status.
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        *   @return             Error code.
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        */
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        TInt ChangeTopicHotmarkStatus( TCbsTopicNumber aNumber, TBool aNewStatus );
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   158
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        /**
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        *   Requests the server to notify the client whenever an event occurs that changes
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        *   the information of the topics. 
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        *   
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        *   Note that the client may select what kind of events it is interested in. Note also that
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        *   there can be at most one pending request per instance of the class.
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        *
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        *   @param aStatus      It is the variable that the server will modify whenever an event occurs.
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        *   @param aRequested   It contains the events the client is listening to.
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        *   @param aEvent       It will contain the event that occurred.
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        *   @param aNumber      Number of topic
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        */
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        void NotifyOnEvent( 
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             TRequestStatus& aStatus, 
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             const TInt aRequested, 
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             TCbsTopicListEvent& aEvent, 
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             TCbsTopicNumber& aNumber );
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   176
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        /**
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        *   Cancels the pending notify request.
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        */
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         void NotifyOnEventCancel();
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   181
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        /**
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        *   Returns the number of session-specific new topics and resets the counter.
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        *   New topics are added by the topic detection feature in absence of
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        *   CBS UI Application.
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        *
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        *   @param aCount       On return contains the amount of new topics.
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        *   @return Result code.
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        */
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        TInt GetNewTopicsCount( TInt& aCount );
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   191
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        /**
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        *   Returns the latest topic's number.
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        *
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        *   @param aNumber       Number of the topic
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        *   @return              Result code.
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        */
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        TInt GetLatestTopicNumber( TCbsTopicNumber& aNumber );
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   199
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        /**
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        *   Returns the total amount of unread messages.
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        *
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        *   @param aCount       It will contain the amount of unread messages.
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        */
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        void GetUnreadMessageCount( TInt& aCount );
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   206
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        /**
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        *   Returns the handle to the latest hotmarked message that has been
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        *   received after the system has started up.
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        *   
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        *   @param aMessage     It is handle to the message.
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        */
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        void GetHotmarkedMessageHandle( TCbsMessageHandle& aMessage );
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        /**
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        *   Returns the number of unread messages in hotmarked topics.
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        *
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        *   This function is to used by the client when deciding whether
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        *   the message or topic list view should be opened to display
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        *   a hotmarked message(s).
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        *
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        *   @return                 Number of unread hotmarked messages
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        */
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        TInt NumberOfUnreadHotmarkedMessages();
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   225
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        /**
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        *   Returns the numbers of topics that precede and succeed the given 
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        *   topic in server-side topic list.
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        *
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        *   If the given topic is the first topic in list, aPosition has 
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        *   ECbsHead bit up. If the given topic is the last topic in list,
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        *   aPosition has ECbsTail bit up.
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        *    
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        *   Return code values:
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        *   KErrNone		aPrevTopicNumber, aNextTopicNumber and aPosition 
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        *		            contain valid values.
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        *   KErrNotFound	aCurrentTopicNumber specified a topic that was not
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        *                   on topic list.
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        *
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        *   @param  aCurrentTopicNumber	    Number that specifies the topic 
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        *                                   whose surroundings are returned
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        *   @param  aPrevTopicNumber		Returns: number of topic preceding 
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        *                                   the given topic
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        *   @param  aNextTopicNumber		Returns: number of topic succeeding
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        *                                   the given topic
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        *   @param  aPosition			    Returns: position of current 
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        *                                   topic in list.
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        *   @return 				        Result code
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        */
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        TInt GetNextAndPrevTopicNumber( 
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	        const TCbsTopicNumber& aCurrentTopicNumber,
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	        TCbsTopicNumber& aPrevTopicNumber,
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	        TCbsTopicNumber& aNextTopicNumber,
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	        TInt& aPosition );
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    private: // prohibited functions
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        // Prohibited copy constructor
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        RCbsTopicList( const RCbsTopicList& );
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        // Prohibited assignment operator
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        RCbsTopicList& operator=( const RCbsTopicList& );
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    private:    // Data
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        // A pointer descriptor used to transfer information 
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        // during a notify request. 
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        TPtr8 iNotifyEventPtr;
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        // A pointer descriptor used to transfer information 
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        // during a notify request.
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        TPtr8 iNotifyHandlePtr;        
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    };
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#endif      //  RCBSTOPICLIST_H   
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// End of File
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