--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imstutils/imconversationview/imcvuiapp/inc/cimcvappmessageflowhandler.h	Tue Feb 02 10:12:18 2010 +0200
@@ -0,0 +1,183 @@
+/*
+* 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 flow handling
+*
+*/
+
+
+
+#ifndef _CIMCVAPPMESSAGEFLOWHANDLER_H
+#define _CIMCVAPPMESSAGEFLOWHANDLER_H
+
+//  INCLUDES
+#include <e32base.h>
+#include "mimcvenginemessageobserver.h"
+#include "mimcvenginechatlistobserver.h"
+
+class MIMCVEngineMessageReadInterface;
+class MIMCVEngineMessageContainer;
+class CIMCVEngineContextObserver;
+class CIMCVEngine;
+// CLASS DECLARATION
+
+/**
+*  Flow controller for messages
+*
+*  @imcvuiapp.exe
+*  @since Series 60 5.0
+*/
+class CIMCVAppMessageFlowHandler : public CTimer, 
+								public MIMCVEngineMessageObserver,
+								public MIMCVEngineChatListObserver
+    {
+    
+    
+    
+    public:
+    
+        /**
+         * Should we fetch new messages or not
+         * @param aFetch ETrue if this chat is in foreground and should 
+         *               receive messages, EFalse otherwise.
+         */
+        void FetchMessages( TBool aFetch );        
+        
+        
+        
+    protected: // Functions from MIMCVEngineMessageObserver
+
+        /**
+		 * Handle events.
+		 * @param aEvent Event to handle.
+		 * @param aIndex, Index of message which is affected by event.
+		 */
+		void HandleMessageEvent( TMessageEventType aEvent, TInt aIndex );
+		
+    private:
+    	/*
+    	* See MIMCVEngineChatListObserver
+    	*/
+    	void HandleChatListEvent(TInt aServiceId, TChatListEventType aEvent, 
+								MIMCVEngineMessageReadInterface* aContainerInfo  ) ;
+    	
+    protected:  // Functions from CTimer
+
+		/**
+		 * @see CTimer
+		 */
+        void RunL();
+        
+		/**
+		 * @see CActive
+		 */
+        TInt RunError( TInt aError );
+		
+	
+
+    private:  // New functions
+
+        /**
+         * Get flow control value from settings
+         */ 
+        void UpdateTimeIntervalL();
+
+        /**
+         * Is opening on going or not.         
+         * @return ETrue if opening on going, EFalse otherwise.
+         */
+        TBool IsOpening() const;
+        
+     
+        
+    private:
+
+        /**
+        * C++ default constructor.
+        */
+        CIMCVAppMessageFlowHandler(MIMCVEngineMessageContainer& aMessageContainer, 
+                				   MIMCVEngineMessageReadInterface& aReadInterface,
+                				   CIMCVEngine& aActiveEngine );
+
+        /**
+        * By default Symbian 2nd phase constructor is private.
+        */
+        void ConstructL( TBool aScrollOver );
+        
+	public:  // Constructors and destructor        
+	
+		/**
+         * Two-phased constructor.         
+         * @param aMessageContainer Interface to UI side message container
+         * @param aReadInterface Message read interface        
+         * @param aScrollOver Is scroll over required 
+         *                             or not.
+         */
+        static CIMCVAppMessageFlowHandler* NewL( 
+                            MIMCVEngineMessageContainer& aMessageContainer, 
+                            MIMCVEngineMessageReadInterface& aReadInterface,
+                            CIMCVEngine& aActiveEngine,
+                            TBool aScrollOver );
+                            
+        /**
+         * Destructor.
+         */
+        virtual ~CIMCVAppMessageFlowHandler();
+                
+
+    private:    // Data
+    
+        // Interface for UI side message container
+        // Not owned
+        MIMCVEngineMessageContainer& iMessages;
+        
+        // Interface for fetching messages
+        // Not owned
+        MIMCVEngineMessageReadInterface& iReadInterface;    
+        
+        CIMCVEngine& iActiveEngine;
+        
+        // time interval for receiving messages
+        TTimeIntervalMicroSeconds32 iTimeInterval;
+        
+        // Is chat deleted already
+        TBool iChatDeleted;
+        
+        // Should we fetch new messages
+        TBool iFetchMessages;
+        
+        // Index for fetching messages
+        TInt iMsgIndex;
+        
+        // Initial count for messages
+        TInt iInitialMsgCount;
+        
+        // Is new message received while opening the chat
+        TBool iNewMsgWhileOpening;
+        
+        // Flag is read from CR variation in class construction
+        // ETrue in releases >= 3.2 
+        // EFalse in releases < 3.2
+        // Set to EFalse if this handler is used to handle
+        // recorded chat
+        TBool iBgOpeningMode;
+        
+        TInt iAddedUnreadMsgs;
+        
+        
+    };
+
+
+#endif      // _CIMCVAPPMESSAGEFLOWHANDLER_H
+
+// End of File