--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/medialists/tsrc/src/glxlistreconstruction.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,234 @@
+/*
+* Copyright (c) 2007 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:    Class that reconstructs a list from notifications
+*
+*/
+
+
+
+
+//  CLASS HEADER
+#include "glxlistreconstruction.h"
+
+//  EXTERNAL INCLUDES
+#include <digia/eunit/eunitmacros.h>
+#include <digia/eunit/eunitdecorators.h>
+#include <mpxcollectionpath.h>
+    
+//  INTERNAL INCLUDES
+
+// -----------------------------------------------------------------------------
+// Constructor
+// -----------------------------------------------------------------------------
+//
+void CGlxListReconstructionBase::ConstructL( TInt aReservationCount )
+    {
+    iNotifications.ReserveL( aReservationCount );
+    iReconstructedList.ReserveL( aReservationCount );
+    iFocusIndex = -1;
+    }
+
+// -----------------------------------------------------------------------------
+// Destructor
+// -----------------------------------------------------------------------------
+//
+CGlxListReconstructionBase::~CGlxListReconstructionBase()
+    {
+    iNotifications.Close();
+    iReconstructedList.Close();
+    iSelectedItemIndices.Close();
+    }
+    
+// -----------------------------------------------------------------------------
+// Clear notifications array
+// -----------------------------------------------------------------------------
+//
+void CGlxListReconstructionBase::ClearNotifications()
+    {
+    iNotifications.Reset();
+    }
+
+// -----------------------------------------------------------------------------
+// Handle items being added
+// -----------------------------------------------------------------------------
+//
+void CGlxListReconstructionBase::HandleItemsAdded( TInt aAddedAtIndex, TInt aCount ) 
+    {
+    TNotification::TData notification[] = { TNotification::EAdd, aAddedAtIndex, aCount };
+    // If fails, not big enough reservation
+    EUNIT_ASSERT( KErrNone == iNotifications.Append( *notification )  ); 
+    
+    // reconstruct the list
+    for ( TInt i = 0; i < aCount; i++ )
+        {
+        // If fails, not big enough reservation
+        EUNIT_ASSERT( KErrNone == iReconstructedList.Insert( 
+            OriginalItem( aAddedAtIndex ), aAddedAtIndex ) );
+        }
+    
+    // Move focus
+    if ( KErrNotFound == iFocusIndex )
+        {
+        iFocusIndex = 0;
+        }
+    else if ( iFocusIndex >= aAddedAtIndex )
+        {
+        iFocusIndex += aCount;
+        }
+    
+    // Move selection        
+    for ( TInt i = 0; i < iSelectedItemIndices.Count(); i++ )
+        {
+        if ( iSelectedItemIndices[ i ] >= aAddedAtIndex )
+            {
+            iSelectedItemIndices[ i ] += aCount;
+            }
+        }
+    
+    // Make sure the original and reconstruction match
+    EUNIT_ASSERT( ReconstructionEquals() );
+    }
+    
+// -----------------------------------------------------------------------------
+// Handle items being removed
+// -----------------------------------------------------------------------------
+//
+void CGlxListReconstructionBase::HandleItemsRemoved( TInt aRemovedFromIndex, TInt aCount ) 
+    {
+    TNotification::TData notification[] = { TNotification::ERemove, aRemovedFromIndex, aCount };
+    // If fails, not big enough reservation
+    EUNIT_ASSERT( KErrNone == iNotifications.Append( *notification ) ); 
+    // reconstruct the list
+    for ( TInt i = 0; i < aCount; i++ )
+        {
+        iReconstructedList.Remove( aRemovedFromIndex );
+        }
+
+    // Move focus
+    if ( iFocusIndex >= aRemovedFromIndex + aCount )
+        {
+        iFocusIndex -= aCount;
+        }
+    else if ( iFocusIndex >= aRemovedFromIndex )
+        {
+        // Focused item was removed
+        iFocusIndex = aRemovedFromIndex - 1;
+        if ( iFocusIndex < 0 )
+            {
+            iFocusIndex = 0;
+            }
+        }
+    if ( !iReconstructedList.Count() )
+        {
+        iFocusIndex = KErrNotFound;
+        }
+    
+    // Move/remove selection        
+    TInt i = 0;
+    while ( i < iSelectedItemIndices.Count() )
+        {
+        if ( iSelectedItemIndices[ i ] >= aRemovedFromIndex + aCount )
+            {
+            iSelectedItemIndices[ i ] -= aCount;
+            }
+        else if ( iSelectedItemIndices[ i ] >= aRemovedFromIndex )
+            {
+            iSelectedItemIndices.Remove( i );
+            continue;
+            }
+        i++;
+        }
+
+    // Make sure the original and reconstruction match
+    EUNIT_ASSERT( ReconstructionEquals() );
+    }
+    
+// -----------------------------------------------------------------------------
+// Handle focus changed
+// -----------------------------------------------------------------------------
+//
+void CGlxListReconstructionBase::HandleFocusChanged( NGlxListDefs::TFocusChangeType aType, 
+            TInt aNewIndex, TInt aOldIndex )
+    {
+    TNotification::TData notification[] = { TNotification::EFocus, aOldIndex, static_cast< TInt >( aType ) };
+    // If fails, not big enough reservation
+    EUNIT_ASSERT( iNotifications.Append( *notification ) == KErrNone ); 
+
+    iFocusIndex = aNewIndex;
+
+    // Make sure the original and reconstruction match
+    EUNIT_ASSERT( ReconstructionEquals() );
+    }
+        
+// -----------------------------------------------------------------------------
+// Handle items selected
+// -----------------------------------------------------------------------------
+//
+void CGlxListReconstructionBase::HandleItemSelected( TInt aIndex, TBool aSelected )
+    {
+    TNotification::TData notification[] = { TNotification::ESelection, aIndex, aSelected };
+    // If fails, not big enough reservation
+    EUNIT_ASSERT( iNotifications.Append( *notification ) == KErrNone ); 
+
+    // Should not get a notification that causes no change
+    if ( aSelected )
+        {
+        EUNIT_ASSERT( KErrNotFound == iSelectedItemIndices.Find( aIndex ) );
+        iSelectedItemIndices.Append( aIndex );
+        }
+    else
+        {
+        TInt index = iSelectedItemIndices.Find( aIndex );
+        EUNIT_ASSERT( KErrNotFound != index );
+        iSelectedItemIndices.Remove( index );
+        }
+
+    EUNIT_ASSERT( ReconstructionEquals() );
+    }
+    
+// -----------------------------------------------------------------------------
+// Test if notifications match
+// -----------------------------------------------------------------------------
+//
+TBool CGlxListReconstructionBase::NotificationListEquals( const TNotification::TData* aNotificationList )
+    {
+    ASSERT( aNotificationList );
+    
+    TBool fail = EFalse;
+    // Iterator through notifications list
+    TBool markerFound = EFalse;
+    TInt i = 0;
+    while ( ETrue )
+        {
+        if ( i == iNotifications.Count() )
+            {
+            if ( KEndMarker == aNotificationList[ i ] )
+                {
+                markerFound = ETrue;
+                }
+            break;
+            }
+        // Notifications must match
+        const TNotification& notification = iNotifications[ i ]; 
+        fail |= ( notification != aNotificationList[ i ] );
+        i++;
+        }
+    // Must have reached the end of iNotifications
+    fail |= ( i != iNotifications.Count() ); 
+    // Must have found a marker
+    fail |= !markerFound;
+    
+    return !fail;
+    }
+