convergedcallengine/csplugin/inc/csptransferprovider.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:11:09 +0200
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/*
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* Copyright (c) 2007-2008 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:  Header of CSPTransferProvider which provides methods and
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*                functionality to handle call transfering
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*
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*/
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#ifndef CSPTRANSFERPROVIDER_H
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#define CSPTRANSFERPROVIDER_H
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#include <e32base.h>
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#include <mccptransferprovider.h>
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#include <mccptransferobserver.h>
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class RMobileCall;
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class MCSPCallErrorObserver;
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class MCSPCommonInfo;
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/**
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* Call transfer methods.
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* MCCPCallObserver is used for errors, statuses, notifications etc
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*
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*  @since S60 3.2
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*/
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class CSPTransferProvider : public CActive,
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                            public MCCPTransferProvider
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    {
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    public:
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        /**
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        * Two phased constructing of the transfer provider instance.
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        * @param aCall mobile call handle
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        * @return the Transfer provider instance
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        */
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        static CSPTransferProvider* NewL( RMobileCall& aCall, 
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                MCSPCallErrorObserver& aErrorObserver,
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                MCSPCommonInfo& aCommonInfo );        
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        /** 
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        * Destructs the transfer provider.
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        * @since S60 3.2
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        */
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        virtual ~CSPTransferProvider();
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    public:
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    // from base class MCCPTransferProvider
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        /**
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        * Attended transfer to given call recipient.
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        * There exist a call between A-B and A-C. A wants to transfer the call
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        * to B-C. A itself will not be inline in case the transfer is made 
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        * succesfully.In above case C will be the aTransferTargetCall. B is 
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        * the recipient of the current call between A-B - called on A's call
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        * object transfer provider. The A-B call is on hold (optional).
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        *
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        * @param aTransferTargetCall Target receiver of the transferred call. 
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        *                            In this case there exist a call.
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        * @return In case of an immediate error returns system error code, 
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        *         if request has been started returns KErrNone.
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        * Actual request result indication comes via observer class
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        */
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        TInt AttendedTransfer( MCCPCall& aTransferTargetCall );
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        /**
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        * Attended transfer to given address. There does not need to be 
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        * a current call between the given transfer target.
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        * @param aTransferTarget Transfer target address
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        * @return In case of an immediate error returns system error code,
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        *         if request has been started returns KErrNone.
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        * Actual request result indication comes via observer class
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        */
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        TInt AttendedTransfer( const TDesC& aTransferTarget );
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        /**
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        * Unattended transfer. Call is requested to be transferred to given
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        * address. After ECCPRemoteTransferring event current call will be
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        * disconnected and no transfer status is checked from the operation. 
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        * @param aTransferTarget Address of the target
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        * @return In case of an immediate error returns system error code, 
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        *         if request has been started returns KErrNone.
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        * Actual request result indication comes via observer class
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        */
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        TInt UnattendedTransfer( const TDesC& aTransferTarget );
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        /**
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        * Accept incoming call transfer request from the call remote party.
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        * @param aAccept ETrue - accept transfer, 
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        *                EFalse do not accept transfer request.
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        * @return In case of an immediate error returns system error code, 
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        *         if request has been started returns KErrNone.
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        * Actual request result indication comes via observer class
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        */
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        TInt AcceptTransfer( const TBool aAccept );
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        /**
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        * When the other end of the call has requested call transfer to
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        * third party it is notified to 
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        * CCPCallCall::EventOccurred(ECCPRemoteTransferring).
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        * The new recipient of the call can be fetched via this method.
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        * @return New recipient for the call after transfer
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        */
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        const TDesC& TransferTarget() const;
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        /**
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        * Add an observer for transfer related events.
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        * Plug-in dependent feature if duplicates or more than one observers 
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        * are allowed or not. Currently CCE will set only one observer.
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        * @since S60 v3.2
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        * @param aObserver Observer
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        * @leave system error if observer adding fails
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        */
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        void AddObserverL( const MCCPTransferObserver& aObserver );
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        /**
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        * Remove an observer.
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        * @since S60 v3.2
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        * @param aObserver Observer
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        * @return KErrNone if removed succesfully
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        *         KErrNotFound if observer was not found.
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        *         Any other system error depending on the error.
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        */
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        TInt RemoveObserver( const MCCPTransferObserver& aObserver );
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        /**
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        * A transfer event has occurred concerning a specific call.
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        * @since S60 3.2
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        * @param aEvent Occurred event.
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        */
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        void TransferEventOccurred( 
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            const MCCPTransferObserver::TCCPTransferEvent aEvent );
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    // from base class CActive
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    protected:
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            /**
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        * From CActive
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        * RunL
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        * @since S60 3.2
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        */
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        void RunL();
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        /**
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        * From CActive
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        * Cancels the monitor
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        * @since S60 3.2
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        */
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        void DoCancel();  
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    private:
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        /**
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        * Constructs the provider
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        *
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        * @param aCall handle mobile call
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        */
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        CSPTransferProvider( RMobileCall& aCall, 
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                             MCSPCallErrorObserver& aErrorObserver,
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                             MCSPCommonInfo& aCommonInfo );
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        /**
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        * Constructing 2nd phase.
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        */
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        void ConstructL();
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    private: // data
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        /**
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        * DTMF event observer.
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        */
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        RPointerArray<MCCPTransferObserver> iObservers;
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        /**
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        * Etel call object
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        */
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        RMobileCall& iCall;
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        /**
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        * Error observer;
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        */
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        MCSPCallErrorObserver& iErrorObserver;
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        /**
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        * Common information for calls.
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        */
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        MCSPCommonInfo& iCommonInfo;
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};
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#endif CSPTRANSFERPROVIDER_H