1 /*

     2 * Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0""

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  A long task wrapper for load file

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef CNOTEPADLOADFILEAO_H

    21 #define CNOTEPADLOADFILEAO_H

    22 

    23 

    24 // INCLUDES

    25 #include <e32base.h>

    26 #include <txtetext.h>

    27 #include <f32file.h>

    28 #include "MNpdLoadFileObserver.h"

    29 

    30 // FORWARD DECLARATIONS

    31 class CCoeEnv;

    32 class RFile;

    33 class CPlainText;

    34 class RFileReadStream;

    35 

    36 // CONSTANTS

    37 // the completed code for load file in one step

    38 static const TInt KErrStep = 10000;

    39 

    40 // CLASS DECLARATION

    41 /**

    42 *  The class implements a long task wrapper for load file

    43 *

    44 *  @lib NpdLib.lib

    45 *  @since 5.2

    46 */

    47 NONSHARABLE_CLASS(CNotepadLoadFileAO) : public CActive

    48     {

    49     public:

    50         static CNotepadLoadFileAO* NewL( MNotepadLoadFileObserver* aObserver,

    51                                          CCoeEnv& aCoeEnv,

    52                                          RFile& aFile, 

    53                                          TBool aGuessEncoding,

    54                                          TUint aEncoding, 

    55                                          CPlainText& aText );

    56 

    57         ~CNotepadLoadFileAO();

    58 

    59     public: // New functions

    60        

    61         /**

    62         * Starts load file .

    63         * @return start load file successful or not, KErrNone is sucessed, other failed

    64         * @since 5.2

    65         */

    66         TInt StartLoadFile( );

    67 

    68         /**

    69         * Cancels load file .

    70         * @since 5.2

    71         */

    72         void CancelLoadFile();

    73 

    74    

    75 

    76     private: // From CActive

    77         void RunL();

    78         

    79         void DoCancel();

    80         

    81     private:

    82         CNotepadLoadFileAO( MNotepadLoadFileObserver* aObserver,

    83                             CCoeEnv& aCoeEnv,

    84                             RFile& aFile, 

    85                             TBool aGuessEncoding,

    86                             TUint aEncoding, 

    87                             CPlainText& aText );

    88 

    89         void ConstructL();

    90         

    91         /**

    92         * Initialize import export param for CPlianText.

    93         * @since 5.2

    94         */

    95         void InitImportExportParamL();

    96         

    97         

    98         /**

    99         * Run step for load file.

   100         * @since 5.2

   101         */

   102         void DoStepL();

   103         

   104 

   105     private: // Data

   106         

   107         // Ref: Pointer to thread function observer

   108         MNotepadLoadFileObserver* iObserver;

   109           

   110         // Ref: refrence to Control environment

   111         CCoeEnv& iCoeEnv;

   112         

   113         // Own: the file object to load

   114         RFile iFile;

   115         

   116         // indicate guess encoding or not

   117         TBool iGuessEncoding;

   118         

   119         // aEncoding encoding of the File

   120         TUint iEncoding;

   121         

   122         // Ref: refrence to CPlainText object

   123         CPlainText& iText;

   124         

   125         // the size of the file to load

   126         TInt iFileSize;

   127         

   128         // the current pos of the file 

   129         TInt iReadPos;

   130         

   131         // indicate cancel load file or not

   132         TBool iCancel;

   133         

   134         // Own: the import export param for CPlianText

   135         CPlainText::TImportExportParam iParam;

   136               

   137     };

   138 

   139 #endif // CNOTEPADLOADFILEAO_H

   140 

   141 // End of File