/*

* Copyright (c) 2008 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: Definition of asynchronous text formatter.

*

*/

#include "emailtrace.h"

#include "FSAsyncTextFormatter.h"

#include <frmtlay.h>

#include <e32base.h>

const TUint KCharsFormattedPerRun = 2000;

// ---------------------------------------------------------------------------

// CFSAsyncTextFormatter::CFSAsyncTextFormatter

// Constructor.

// ---------------------------------------------------------------------------

//

CFSAsyncTextFormatter::CFSAsyncTextFormatter() : CActive( EPriorityLow )

    {

    FUNC_LOG;

    CActiveScheduler::Add( this );

    }

// ---------------------------------------------------------------------------

// CFSAsyncTextFormatter::~CFSAsyncTextFormatter

// Destructor.

// ---------------------------------------------------------------------------

//

CFSAsyncTextFormatter::~CFSAsyncTextFormatter()

    {

    FUNC_LOG;

    Cancel();

    }

// ---------------------------------------------------------------------------

// CFSAsyncTextFormatter::NewL

// Two-phased constructor.

// ---------------------------------------------------------------------------

//

CFSAsyncTextFormatter* CFSAsyncTextFormatter::NewL()

    {

    FUNC_LOG;

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

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// CFSAsyncTextFormatter::ConstructL

// Symbian 2nd phase constructor can leave.

// ---------------------------------------------------------------------------

//

void CFSAsyncTextFormatter::ConstructL()

    {

    FUNC_LOG;

    iCurrentDocPos = 0;

    }

// ---------------------------------------------------------------------------

// CFSAsyncTextFormatter::FormatAll

// Starts formatting process.

// ---------------------------------------------------------------------------

//

void CFSAsyncTextFormatter::StartFormatting( CTextLayout* aTextLayout, 

        MAsyncTextFormatterObserver* aObserver )

    {

    FUNC_LOG;

    iTextLayout = aTextLayout;

    iObserver = aObserver;

    iCurrentDocPos = 0;

    if ( !IsActive() )

        {

        TRequestStatus * status = &iStatus;

        User::RequestComplete(status, 0);

        SetActive();

        }

    }

// ---------------------------------------------------------------------------

// CFSAsyncTextFormatter::RunL

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

// ---------------------------------------------------------------------------

//

void CFSAsyncTextFormatter::RunL()

    {

    FUNC_LOG;

    if ( iCurrentDocPos < iTextLayout->DocumentLength() )

        {

        iCurrentDocPos += KCharsFormattedPerRun;

        if ( iCurrentDocPos > iTextLayout->DocumentLength() )

            {

            iCurrentDocPos = iTextLayout->DocumentLength();

            }

        iTextLayout->ExtendFormattingToCoverPosL( iCurrentDocPos );

        // run again

        TRequestStatus* status = &iStatus;

        User::RequestComplete( status, KErrNone );

        SetActive();

        }

    else

        {

        if ( iObserver )

            {

            iObserver->FormatAllTextComplete();

            }

        }

    }

// ---------------------------------------------------------------------------

// CFSAsyncTextFormatter::DoCancel

// Implements cancellation of an outstanding request.

// ---------------------------------------------------------------------------

//

void CFSAsyncTextFormatter::DoCancel()

    {

    FUNC_LOG;

    if ( IsActive() && iObserver )

        {

        iObserver->FormatAllTextCancelled();

        }

    }