--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/textrendering/textformatting/inc/EditorPlainTextUndo.h	Fri Jun 04 10:37:54 2010 +0100
@@ -0,0 +1,95 @@
+/*
+* Copyright (c) 2000-2009 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 EDITORPLAINTEXTUNDO_H_
+#define EDITORPLAINTEXTUNDO_H_
+
+#include "unified_editor.h"
+
+namespace UndoSystem
+{
+class CCommandManager;
+class MNotUndoableGatekeeper;
+}
+
+class CEditorPlainTextCommandFactory;
+
+/**
+MUnifiedEditor decorator that adds undo functionality to plain text editors.
+It passes commands transparently to the editor it is constructed upon, while
+storing the operations so that they can be undone and redone. Calling a
+non-const method of MUnifiedEditor wipes all 'Redo' operations.
+The undo and redo operations are only guaranteed to be accurate if the
+underlying editor satisfies certain conditions.
+
+@since App-frameworks6.1
+@internalComponent
+*/
+class CEditorPlainTextWithUndo : public CBase, public MUnifiedEditor,
+	private MUnifiedEditor::MClipboardSupport
+	{
+public:
+	~CEditorPlainTextWithUndo();
+
+	/**
+	 * Creates a CEditorPlainTextWithUndo, using the aSharedUndoSystem.
+	 * This allows many objects to stay in synchronization when each is
+	 * accessed seperately.
+	 * The aEditor is not owned.
+	 * Undo functionality is accessed only via the aSharedUndoSystem
+	 * object.
+	 */
+	IMPORT_C static CEditorPlainTextWithUndo* NewL(MUnifiedEditor& aEditor,
+		UndoSystem::CCommandManager* aSharedUndoSystem);
+
+	// From MUnifiedEditor
+	void InsertTextL(TInt aPos, const TDesC& aText, const TDesC* aStyle,
+		const TTmCharFormatLayer*, const RTmParFormatLayer*);
+	void DeleteTextL(TInt aPos,TInt aLength);
+	MTmOptionalInterface* Interface(TUint aId);
+
+	// The following methods are forwarded to the base editor
+	TInt DocumentLength() const;
+	void GetText(TInt aPos, TPtrC& aText) const;
+	void GetBaseFormatL(TTmCharFormat&, RTmParFormat&) const;
+	void GetCharFormat(TInt aPos, TFormatLevel aLevel,
+		TTmCharFormatLayer& aFormat,TInt& aRunLength) const;
+	void GetParFormatL(TInt aPos, TFormatLevel aLevel,
+		RTmParFormatLayer& aFormat, TInt& aRunLength) const;
+	void SetBaseFormatL(const TTmCharFormat&, const RTmParFormat&);
+	void SetCharFormatL(TInt aPos, TInt aLength, const TTmCharFormatLayer&);
+	void SetParFormatL(TInt aPos, TInt aLength, const RTmParFormatLayer&);
+	void DeleteCharFormatL(TInt aPos, TInt aLength);
+	void DeleteParFormatL(TInt aPos, TInt aLength);
+
+private:
+	CEditorPlainTextWithUndo();
+	void ConstructL(MUnifiedEditor& aEditorBasedOn,
+		UndoSystem::CCommandManager& aSharedUndoSystem);
+
+	// from MUnifiedEditor::MClipboardSupport
+	void CopyToStoreL(CStreamStore&, CStreamDictionary&, TInt, TInt) const;
+	void PasteFromStoreL(const CStreamStore&, const CStreamDictionary&, TInt);
+
+	CEditorPlainTextCommandFactory*	iFactory;
+	MUnifiedEditor*						iBaseEditor;
+	UndoSystem::CCommandManager*	iCommandManager;
+	};
+
+#endif	// EDITORPLAINTEXTUNDO_H_
+