diff -r f72a12da539e -r 5315654608de idlehomescreen/widgetmanager/src/wmwidgetloaderao.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/idlehomescreen/widgetmanager/src/wmwidgetloaderao.cpp	Thu Jan 07 12:39:41 2010 +0200
@@ -0,0 +1,271 @@
+/*
+* 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
+