diff -r 000000000000 -r bde4ae8d615e os/textandloc/textrendering/texthandling/inc/MEdObsrv.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/textandloc/textrendering/texthandling/inc/MEdObsrv.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,62 @@
+/*
+* Copyright (c) 1999-2009 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: 
+*
+*/
+
+
+#ifndef __MEDOBSRV_H__
+#define __MEDOBSRV_H__
+
+#include <e32def.h>
+
+
+
+class MEditObserver
+/** 
+Specifies the mixin protocol for a rich text edit observer. 
+
+This class is implemented by controls which use a rich text (CRichText) object, 
+when it is possible for the text object to be changed from outside of the 
+control without the control's knowledge.
+
+An edit observer is a callback to the control from the CRichText object which 
+it has been set up to observe. The edit observer is set up using CRichText::SetEditObserver(). 
+@publishedAll
+@released
+*/
+	{
+public:
+	// Observer function called by CRichText to signal changes to the text
+	// buffer within it. A pointer to this function must be passed in to
+	// a CRichText instance by <rich text instance>.SetEditObserver(<ptr>).
+	// aStart is the start position of the edit and aExtent is the number
+	// of characters added or, if negative, deleted after this position.
+	
+	
+	/** Observer function called by the CRichText object when the object is edited 
+	to give notification of changes to its text buffer. In this way, the control 
+	knows how the text object has changed and can reformat and redraw the text 
+	object appropriately.
+	
+	A pointer to the observer object must have been passed in to a CRichText instance 
+	using CRichText::SetEditObserver().
+	
+	@param aStart The start position of the edit. 
+	@param aExtent The number of characters added or, if negative, deleted after 
+	this position. */
+	virtual void EditObserver(TInt aStart, TInt aExtent) = 0;
+	};
+
+#endif