--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/notepad/notepad1/inc/NpdLoadFileAO.h	Wed Nov 03 17:12:22 2010 +0530
@@ -0,0 +1,150 @@
+/*
+* Copyright (c) 2006-2007 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:  A long task wrapper for load file
+*
+*/
+
+
+
+#ifndef CNOTEPADLOADFILEAO_H
+#define CNOTEPADLOADFILEAO_H
+
+
+// INCLUDES
+#include <e32base.h>
+#include <txtetext.h>
+#include <f32file.h>
+#include "MNpdLoadFileObserver.h"
+
+// FORWARD DECLARATIONS
+class CCoeEnv;
+class RFile;
+class CPlainText;
+class RFileReadStream;
+
+// CONSTANTS
+// the completed code for load file in one step
+static const TInt KErrStep = 10000;
+
+// CLASS DECLARATION
+/**
+*  The class implements a long task wrapper for load file
+*
+*  @lib NpdLib.lib
+*  @since 5.2
+*/
+NONSHARABLE_CLASS(CNotepadLoadFileAO) : public CActive
+    {
+    public:
+        static CNotepadLoadFileAO* NewL( MNotepadLoadFileObserver* aObserver,
+                                         CCoeEnv& aCoeEnv,
+                                         RFile& aFile, 
+                                         TBool aGuessEncoding,
+                                         TUint aEncoding, 
+                                         CPlainText& aText );
+
+        ~CNotepadLoadFileAO();
+
+    public: // New functions
+       
+        /**
+        * Starts load file .
+        * @return start load file successful or not, KErrNone is sucessed, other failed
+        * @since 5.2
+        */
+        TInt StartLoadFile( );
+
+        /**
+        * Cancels load file .
+        * @since 5.2
+        */
+        void CancelLoadFile();
+
+   
+
+    private: // From CActive
+        void RunL();
+        
+        void DoCancel();
+        
+    private:
+        CNotepadLoadFileAO( MNotepadLoadFileObserver* aObserver,
+                            CCoeEnv& aCoeEnv,
+                            RFile& aFile, 
+                            TBool aGuessEncoding,
+                            TUint aEncoding, 
+                            CPlainText& aText );
+
+        void ConstructL();
+        
+        /**
+        * Initialize import export param for CPlianText.
+        * @since 5.2
+        */
+        void InitImportExportParamL();
+        
+        
+        /**
+        * Run step for load file.
+        * @since 5.2
+        */
+        void DoStepL();
+        
+        /**
+        * Converts text encoded in a non-Unicode character set into the Unicode character set (UCS-2).
+        * @since 5.2
+        * @param aUnicodeData On return, contains the converted text in the Unicode character.
+        * @param aData The non-Unicode source text to be converted. 
+        * @return The number of unconverted bytes left at the end of the input descriptor 
+        * (e.g. because the output descriptor is not long enough to hold all the text), or one of the error values defined in TError. 
+        */
+        TInt ConvertToUnicodeL( TDes& aUnicodeData, const TDes8& aData );
+        
+    private: // Data
+        
+        // Ref: Pointer to thread function observer
+        MNotepadLoadFileObserver* iObserver;
+          
+        // Ref: refrence to Control environment
+        CCoeEnv& iCoeEnv;
+        
+        // Own: the file object to load
+        RFile iFile;
+        
+        // indicate guess encoding or not
+        TBool iGuessEncoding;
+        
+        // aEncoding encoding of the File
+        TUint iEncoding;
+        
+        // Ref: refrence to CPlainText object
+        CPlainText& iText;
+        
+        // the size of the file to load
+        TInt iFileSize;
+        
+        // the current pos of the file 
+        TInt iReadPos;
+        
+        // indicate cancel load file or not
+        TBool iCancel;
+        
+        // Own: the import export param for CPlianText
+        CPlainText::TImportExportParam iParam;
+              
+    };
+
+#endif // CNOTEPADLOADFILEAO_H
+
+// End of File