diff -r 000000000000 -r 5e5d6b214f4f imstutils/imconversationview/imcvuiengine/inc/mimcvenginemessagehandler.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imstutils/imconversationview/imcvuiengine/inc/mimcvenginemessagehandler.h	Tue Feb 02 10:12:18 2010 +0200
@@ -0,0 +1,116 @@
+/*
+* Copyright (c) 2007-2008 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:  message handler interface
+*
+*/
+
+#ifndef MIMCVENGINEMESSAGEHANDLER_H
+#define MIMCVENGINEMESSAGEHANDLER_H
+
+//  INCLUDES
+#include <e32def.h>
+#include "mimcvenginemessagehandlerobserver.h"
+//	FORWARD CLASS DECLERATIONS
+class MIMCVEngineMessage;
+class MIMCVEngineMessageCreator;
+
+// CLASS DECLARATION
+			
+/**
+ *  Observer interface to handle message container changes.
+ *
+ *  @lib imcvengine.dll
+ *  @since 5.0
+ */
+class MIMCVEngineMessageHandler
+	{
+
+	public: // Definitions
+		
+	    /**
+        * @see message creator class
+        */
+	    virtual MIMCVEngineMessageCreator& MessageCreator() const = 0 ; 
+       
+	   /** SendMessageL 
+		*  api to send the message to below layer
+		* @param aMessage, message to be send
+		*/
+        virtual void SendMessageL(MIMCVEngineMessage& aMessage) = 0 ;
+        
+        /** append to cache 
+		*  api to send the message to below layer
+		* @param aBuddyId, aBuddyId to be saved
+		* @param aTextMessage, message to be saved
+		*/	
+        virtual void AppendToCacheL(const TDesC& aBuddyId , const TDesC& aTextMessage ) = 0 ;
+        
+     	
+		/**
+		 * @see MIMCVEngineMessageHandler
+		 */
+		virtual void StartNewConversationL(const TDesC& aRecipientId )= 0;
+		
+		
+		/**
+		 * @see MIMCVEngineMessageHandler
+		 */
+		virtual TInt CloseConversationL(const TDesC& aBuddyId) = 0 ;
+		
+		
+		/**
+		 * @see MIMCVEngineMessageHandler
+		 */
+		virtual void CloseAllConversationL() = 0 ;
+		
+	
+		/**
+		 * @see MIMCVEngineMessageHandler
+		 */
+		virtual TInt DeactivateConversationL() = 0;
+
+		virtual void UnSubscribePresenceL(const TDesC& aRecipientId) = 0;
+		/**
+		 * @see MIMCVEngineMessageHandler
+		 */
+		virtual void SubscribePresenceL(const TDesC& aWVID) = 0 ;
+		
+		/**
+		 * @see MIMCVEngineMessageHandler
+		 */
+		virtual void SetObserver( MIMCVEngineMessageHandlerObserver* aObserver ) = 0;
+		
+		/**
+		 * @see MIMCVEngineMessageHandler
+		 */
+		virtual void RemoveObserver() = 0;	
+		
+		/**
+		 * @see MIMCVEngineMessageHandler
+		 */
+		virtual TIMCVOnlineStatus GetPresenceStatus() = 0 ;
+		
+		virtual TInt ServiceId() const = 0  ;
+        	
+	public: // For protection.
+
+		/**
+		 * Destructor for protection
+		 */
+		virtual ~MIMCVEngineMessageHandler(){}
+	};
+
+#endif      // MIMCVENGINEMESSAGEHANDLER_H
+
+// End of File