/*

* Copyright (c) 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:

* Active object to load widgets into list

*

*/

// INCLUDE FILES

#include "wmcommon.h"

#include "wmplugin.h"

#include "wmresourceloader.h"

#include "wmpersistentwidgetorder.h"

#include "wmlistbox.h"

#include "wmwidgetloaderao.h"

#include <hscontentcontroller.h> // content control api

#include <hscontentinfoarray.h> // content control api

#include <widgetregistryclient.h> // widget reqistry

#include <avkon.rsg> // avkon resources

#include <barsread.h> // TResourceReader

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

// CWmWidgetLoaderAo::NewL

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

//

CWmWidgetLoaderAo* CWmWidgetLoaderAo::NewL(

        CWmPlugin& aWmPlugin,

        CWmListBox& aTargetList )

    {

    CWmWidgetLoaderAo* self = new (ELeave) CWmWidgetLoaderAo(

            aWmPlugin, aTargetList );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CWmWidgetLoaderAo::NewL

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

//

CWmWidgetLoaderAo::CWmWidgetLoaderAo(

        CWmPlugin& aWmPlugin,

        CWmListBox& aTargetList )

    : CAsyncOneShot( EPriorityStandard )

    , iWmPlugin( aWmPlugin )

    , iWidgetsList( aTargetList )

    {

    iWidgetRegistry = NULL;

    iWidgetOrder = NULL;

    }

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

// CWmWidgetLoaderAo::ConstructL

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

//

void CWmWidgetLoaderAo::ConstructL()

    {

    }

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

// CWmWidgetLoaderAo::~CWmWidgetLoaderAo

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

//

CWmWidgetLoaderAo::~CWmWidgetLoaderAo()

    {

    // cancel ongoing operation

    Cancel();

    // cleanup run data

    Cleanup();

    }

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

// CWmWidgetLoaderAo::StartLoading

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

//

void CWmWidgetLoaderAo::StartLoading()

    {

    if ( IsActive() )

        {

        // cancel ongoing process

        Cancel();

        }

    Call();

    }

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

// CWmWidgetLoaderAo::RunL

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

//

void CWmWidgetLoaderAo::RunL()

    {

    DoLoadWidgetsL();

    Cleanup();

    }

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

// CWmWidgetLoaderAo::RunError

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

//

TInt CWmWidgetLoaderAo::RunError( TInt /*aError*/ )

    {

    Cleanup();

    return KErrNone;

    }

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

// CWmWidgetLoaderAo::DoLoadWidgetsL

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

//

void CWmWidgetLoaderAo::DoLoadWidgetsL()

    {

    // 1. mark all the existing widgets initially non-valid

    for( TInt i=0; i<iWidgetsList.WidgetDataCount(); ++i )

        iWidgetsList.WidgetData(i).SetValid( EFalse );

    // 2. load the widgets array

    MHsContentController& controller = iWmPlugin.ContentController();    

    CHsContentInfoArray* contentInfoArray = CHsContentInfoArray::NewL();

    CleanupStack::PushL( contentInfoArray );

    controller.WidgetListL( *contentInfoArray );

    // 3. load the widget order

    iWidgetOrder = CWmPersistentWidgetOrder::NewL( iWmPlugin.FileServer() );

    TRAPD( loadError, iWidgetOrder->LoadL() );

    // 4. loop through the content array and compare it against the existing

    // widget data.

    TInt widgetsAdded = 0;

    TInt widgetsChanged = 0;

    while( contentInfoArray->Array().Count() > 0 )

        {

        CHsContentInfo* contentInfo = contentInfoArray->Array()[0];

        contentInfoArray->Array().Remove( 0 );

        // check if this widget exists.

        // if it does, keep the existing one

        // if it does not, add it

        CWmWidgetData* existingData = FindWidgetData( *contentInfo );

        if ( existingData )

            {

            // update existing widget data

            existingData->SetValid( ETrue );

            if ( existingData->ReplaceContentInfoL( contentInfo ) )

                {

                ++widgetsChanged;

                }

            }

        else

            {

            // add a new widget data

            AddWidgetDataL( contentInfo );

            ++widgetsAdded;

            }

        }

    // 5: finally, remove all UI widgets that during the loading process were

    // NOT marked as VALID. those widgets do not exist anymore.

    TInt widgetsRemoved = 0;

    for( TInt i=0; i<iWidgetsList.WidgetDataCount(); i++ )

        {

        if( !iWidgetsList.WidgetData(i).IsValid() )

            {

            iWidgetsList.RemoveWidgetData( i );

            ++widgetsRemoved;

            }

        }

    if ( widgetsRemoved > 0 )

        {

        iWidgetsList.DrawDeferred();

        }

    // 6: cleanup

    CleanupStack::PopAndDestroy( contentInfoArray );

    // 7. check list empty condition

    if ( iWidgetsList.WidgetDataCount() == 0 )

        {

        TResourceReader rr;

        CEikonEnv::Static()->CreateResourceReaderLC(

                rr, R_AVKON_LISTBOX_DEFAULT_EMPTY_TEXT );

        TPtrC empty= rr.ReadTPtrC();

        iWidgetsList.View()->SetListEmptyTextL( empty );

        CleanupStack::PopAndDestroy();

        iWidgetsList.DrawDeferred();

        }

    // 8. store list order if necessary

    if ( loadError != KErrNone || widgetsAdded > 0 || widgetsRemoved > 0 )

        {

        iWidgetOrder->StoreL( iWidgetsList.WidgetDataArray() );

        }

    }

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

// CWmWidgetLoaderAo::FindWidgetDataL

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

//

CWmWidgetData* CWmWidgetLoaderAo::FindWidgetData(

        CHsContentInfo& aContentInfo )

    {

    CWmWidgetData* data = NULL;

    for( TInt i=0; i<iWidgetsList.WidgetDataCount() && !data; ++i )

        {

        if ( iWidgetsList.WidgetData(i).EqualsTo( aContentInfo ) )

            {

            data = &iWidgetsList.WidgetData(i);

            }

        }

    return data;

    }

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

// CWmWidgetLoaderAo::AddWidgetDataL

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

//

void CWmWidgetLoaderAo::AddWidgetDataL(

        CHsContentInfo* aContentInfo )

    {

    CleanupStack::PushL( aContentInfo );

    if ( !iWidgetRegistry )

        {

        iWidgetRegistry = new (ELeave) RWidgetRegistryClientSession();

        User::LeaveIfError( iWidgetRegistry->Connect() );

        }

    CleanupStack::Pop( aContentInfo );

    CWmWidgetData* widgetData = CWmWidgetData::NewLC( 

            aContentInfo, iWidgetRegistry );

    widgetData->SetPersistentWidgetOrder( iWidgetOrder );

    widgetData->SetValid( ETrue );

    iWidgetsList.AddWidgetDataL( widgetData );

    CleanupStack::Pop( widgetData );

    }

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

// CWmWidgetLoaderAo::Cleanup

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

//

void CWmWidgetLoaderAo::Cleanup()

    {

    // disconnect widget registry

    if ( iWidgetRegistry )

        {

        iWidgetRegistry->Disconnect();

        iWidgetRegistry->Close();

        delete iWidgetRegistry;

        iWidgetRegistry = NULL;

        }

    // delete widget order

    delete iWidgetOrder;

    iWidgetOrder = NULL;

    }

// end of file