1 /*

     2 * Copyright (c) 2008 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 the License "Symbian Foundation License v1.0"

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: Definition of asynchronous text formatter.

    15 *

    16 */

    17 

    18 #include "emailtrace.h"

    19 #include "FSAsyncTextFormatter.h"

    20 #include <FRMTLAY.H>

    21 #include <e32base.h>

    22 

    23 const TUint KCharsFormattedPerRun = 2000;

    24 

    25 // ---------------------------------------------------------------------------

    26 // CFSAsyncTextFormatter::CFSAsyncTextFormatter

    27 // Constructor.

    28 // ---------------------------------------------------------------------------

    29 //

    30 CFSAsyncTextFormatter::CFSAsyncTextFormatter() : CActive( EPriorityLow )

    31     {

    32     FUNC_LOG;

    33     CActiveScheduler::Add( this );

    34     }

    35 

    36 // ---------------------------------------------------------------------------

    37 // CFSAsyncTextFormatter::~CFSAsyncTextFormatter

    38 // Destructor.

    39 // ---------------------------------------------------------------------------

    40 //

    41 CFSAsyncTextFormatter::~CFSAsyncTextFormatter()

    42     {

    43     FUNC_LOG;

    44     Cancel();

    45     }

    46 

    47 // ---------------------------------------------------------------------------

    48 // CFSAsyncTextFormatter::NewL

    49 // Two-phased constructor.

    50 // ---------------------------------------------------------------------------

    51 //

    52 CFSAsyncTextFormatter* CFSAsyncTextFormatter::NewL()

    53     {

    54     FUNC_LOG;

    55     CFSAsyncTextFormatter* self = new (ELeave) CFSAsyncTextFormatter();

    56     CleanupStack::PushL( self );

    57     self->ConstructL();

    58     CleanupStack::Pop( self );

    59     return self;

    60     }

    61 

    62 // ---------------------------------------------------------------------------

    63 // CFSAsyncTextFormatter::ConstructL

    64 // Symbian 2nd phase constructor can leave.

    65 // ---------------------------------------------------------------------------

    66 //

    67 void CFSAsyncTextFormatter::ConstructL()

    68     {

    69     FUNC_LOG;

    70     iCurrentDocPos = 0;

    71     }

    72 

    73 // ---------------------------------------------------------------------------

    74 // CFSAsyncTextFormatter::FormatAll

    75 // Starts formatting process.

    76 // ---------------------------------------------------------------------------

    77 //

    78 void CFSAsyncTextFormatter::StartFormatting( CTextLayout* aTextLayout, 

    79         MAsyncTextFormatterObserver* aObserver )

    80     {

    81     FUNC_LOG;

    82     iTextLayout = aTextLayout;

    83     iObserver = aObserver;

    84     iCurrentDocPos = 0;

    85     

    86     if ( !IsActive() )

    87         {

    88         TRequestStatus * status = &iStatus;

    89         User::RequestComplete(status, 0);

    90         SetActive();

    91         }

    92     }

    93 

    94 // ---------------------------------------------------------------------------

    95 // CFSAsyncTextFormatter::RunL

    96 // Handles an active object's request completion event.

    97 // ---------------------------------------------------------------------------

    98 //

    99 void CFSAsyncTextFormatter::RunL()

   100     {

   101     FUNC_LOG;

   102     

   103     if ( iCurrentDocPos < iTextLayout->DocumentLength() )

   104         {

   105         iCurrentDocPos += KCharsFormattedPerRun;

   106         if ( iCurrentDocPos > iTextLayout->DocumentLength() )

   107             {

   108             iCurrentDocPos = iTextLayout->DocumentLength();

   109             }

   110         iTextLayout->ExtendFormattingToCoverPosL( iCurrentDocPos );

   111         

   112         // run again

   113         TRequestStatus* status = &iStatus;

   114         User::RequestComplete( status, KErrNone );

   115         SetActive();

   116         }

   117     else

   118         {

   119         if ( iObserver )

   120             {

   121             iObserver->FormatAllTextComplete();

   122             }

   123         }

   124     }

   125 

   126 // ---------------------------------------------------------------------------

   127 // CFSAsyncTextFormatter::DoCancel

   128 // Implements cancellation of an outstanding request.

   129 // ---------------------------------------------------------------------------

   130 //

   131 void CFSAsyncTextFormatter::DoCancel()

   132     {

   133     FUNC_LOG;

   134     if ( IsActive() && iObserver )

   135         {

   136         iObserver->FormatAllTextCancelled();

   137         }

   138     }