private void initializeFromSource()
{
if (_sourceNotifyCollectionChangedEventHandler != null)
{
int itemInfosCount = _itemInfos.Count;
for (int index = 0; index < itemInfosCount; index++)
{
ItemInfo itemInfo = _itemInfos[index];
ExpressionWatcher expressionWatcher = itemInfo.ExpressionWatcher;
expressionWatcher.Dispose();
}
int capacity = _sourceScalar != null?Utils.getCapacity(_sourceScalar) : Utils.getCapacity(_source);
_itemInfos = new List <ItemInfo>(capacity);
_sourcePositions = new Positions <ItemInfo>(_itemInfos);
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged -= _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceAsList.CollectionChanged -= _sourceWeakNotifyCollectionChangedEventHandler.Handle;
_sourceWeakNotifyCollectionChangedEventHandler = null;
}
_sourceNotifyCollectionChangedEventHandler = null;
}
_predicatePassedCount = 0;
if (_sourceScalar != null)
{
_source = _sourceScalar.Value;
}
_sourceAsList = null;
if (_source != null)
{
if (_source is ObservableCollectionWithChangeMarker <TSourceItem> sourceAsList)
{
_sourceAsList = sourceAsList;
_rootSourceWrapper = false;
}
else
{
_sourceAsList = new RootSourceWrapper <TSourceItem>(_source);
_rootSourceWrapper = true;
}
_lastProcessedSourceChangeMarker = _sourceAsList.ChangeMarkerField;
int count = _sourceAsList.Count;
for (int sourceIndex = 0; sourceIndex < count; sourceIndex++)
{
TSourceItem sourceItem = _sourceAsList[sourceIndex];
ItemInfo itemInfo = registerSourceItem(sourceItem, sourceIndex);
if (ApplyPredicate(sourceIndex))
{
_predicatePassedCount++;
itemInfo.PredicateResult = true;
}
}
_sourceNotifyCollectionChangedEventHandler = handleSourceCollectionChanged;
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged += _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourceNotifyCollectionChangedEventHandler);
_sourceAsList.CollectionChanged += _sourceWeakNotifyCollectionChangedEventHandler.Handle;
}
calculateValue();
}
else
{
if (_value)
{
setValue(false);
}
}
}
private void initializeFromSource()
{
int originalCount = _items.Count;
if (_sourceNotifyCollectionChangedEventHandler != null)
{
int itemInfosCount = _itemInfos.Count;
for (int index = 0; index < itemInfosCount; index++)
{
ItemInfo itemInfo = _itemInfos[index];
ExpressionWatcher expressionWatcher = itemInfo.ExpressionWatcher;
expressionWatcher.Dispose();
}
int capacity = _sourceScalar != null?Utils.getCapacity(_sourceScalar) : Utils.getCapacity(_source);
_filteredPositions = new Positions <Position>(new List <Position>(_initialCapacity));
_itemInfos = new List <ItemInfo>(capacity);
_sourcePositions = new Positions <ItemInfo>(_itemInfos);
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged -= _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceAsList.CollectionChanged -= _sourceWeakNotifyCollectionChangedEventHandler.Handle;
_sourceWeakNotifyCollectionChangedEventHandler = null;
}
_sourceNotifyCollectionChangedEventHandler = null;
}
if (_sourceScalar != null)
{
_source = _sourceScalar.Value;
}
_sourceAsList = null;
if (_source != null)
{
if (_source is ObservableCollectionWithChangeMarker <TSourceItem> sourceAsList)
{
_sourceAsList = sourceAsList;
_rootSourceWrapper = false;
}
else
{
_sourceAsList = new RootSourceWrapper <TSourceItem>(_source);
_rootSourceWrapper = true;
}
_lastProcessedSourceChangeMarker = _sourceAsList.ChangeMarkerField;
Position nextItemPosition = _filteredPositions.Add();
int count = _sourceAsList.Count;
int insertingIndex = 0;
int sourceIndex;
for (sourceIndex = 0; sourceIndex < count; sourceIndex++)
{
TSourceItem sourceItem = _sourceAsList[sourceIndex];
Position currentFilteredItemPosition = null;
ItemInfo itemInfo = registerSourceItem(sourceItem, sourceIndex, null, null);
if (ApplyPredicate(sourceIndex))
{
if (originalCount > insertingIndex)
{
_items[insertingIndex++] = sourceItem;
}
else
{
_items.Insert(insertingIndex++, sourceItem);
}
currentFilteredItemPosition = nextItemPosition;
nextItemPosition = _filteredPositions.Add();
}
itemInfo.FilteredPosition = currentFilteredItemPosition;
itemInfo.NextFilteredItemPosition = nextItemPosition;
}
for (int index = originalCount - 1; index >= insertingIndex; index--)
{
_items.RemoveAt(index);
}
_sourceNotifyCollectionChangedEventHandler = handleSourceCollectionChanged;
if (_rootSourceWrapper)
{
_sourceAsList.CollectionChanged += _sourceNotifyCollectionChangedEventHandler;
}
else
{
_sourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_sourceNotifyCollectionChangedEventHandler);
_sourceAsList.CollectionChanged += _sourceWeakNotifyCollectionChangedEventHandler.Handle;
}
}
else
{
_items.Clear();
}
reset();
}
internal static Position processAddSourceItem(int newSourceIndex, bool predicateValue, ref Position newItemPosition,
ref int?newFilteredIndex, List <FilteringItemInfo> filteringItemInfos, Positions <Position> filteredPositions, int count)
{
Position nextItemPosition;
if (newSourceIndex < filteringItemInfos.Count)
{
FilteringItemInfo oldItemInfo = filteringItemInfos[newSourceIndex];
Position oldItemInfoNextFilteredItemPosition = oldItemInfo.NextFilteredItemPosition;
Position oldItemInfoFilteredPosition = oldItemInfo.FilteredPosition;
if (predicateValue)
{
if (oldItemInfoFilteredPosition == null)
{
newItemPosition = filteredPositions.Insert(oldItemInfoNextFilteredItemPosition.Index);
nextItemPosition = oldItemInfoNextFilteredItemPosition;
newFilteredIndex = newItemPosition.Index;
}
else
{
int filteredIndex = oldItemInfoFilteredPosition.Index;
newFilteredIndex = filteredIndex;
newItemPosition = filteredPositions.Insert(filteredIndex);
nextItemPosition = oldItemInfoFilteredPosition;
}
modifyNextFilteredItemIndex(newSourceIndex, newItemPosition, filteringItemInfos);
}
else
{
nextItemPosition = oldItemInfoFilteredPosition ?? oldItemInfoNextFilteredItemPosition;
}
}
else
{
if (predicateValue)
{
newItemPosition = filteredPositions.List[count];
newFilteredIndex = count;
nextItemPosition = filteredPositions.Add();
}
else
{
//здесь newPositionIndex = null; так и должно быть
nextItemPosition = filteredPositions.List[count];
}
}
return(nextItemPosition);
}
internal static void ProcessMoveSourceItems <TSourceItem1>(int oldSourceIndex, int newSourceIndex1,
List <FilteringItemInfo> filteringItemInfos, Positions <Position> filteredPositions,
Positions <FilteringItemInfo> sourcePositions, CollectionComputing <TSourceItem1> current)
{
if (newSourceIndex1 != oldSourceIndex)
{
FilteringItemInfo itemInfoOfOldSourceIndex = filteringItemInfos[oldSourceIndex];
FilteringItemInfo itemInfoOfNewSourceIndex = filteringItemInfos[newSourceIndex1];
Position nextPosition1;
Position itemInfoOfOldSourceIndexFilteredPosition = itemInfoOfOldSourceIndex.FilteredPosition;
Position itemInfoOfNewSourceIndexNextFilteredItemPosition = itemInfoOfNewSourceIndex.NextFilteredItemPosition;
Position itemInfoOfNewSourceIndexFilteredPosition = itemInfoOfNewSourceIndex.FilteredPosition;
if (itemInfoOfOldSourceIndexFilteredPosition != null)
{
int oldFilteredIndex = itemInfoOfOldSourceIndexFilteredPosition.Index;
int newFilteredIndex1;
Position newPosition1 = itemInfoOfOldSourceIndexFilteredPosition;
if (itemInfoOfNewSourceIndexFilteredPosition == null)
{
//nextPositionIndex = itemInfoOfNewSourceIndex.NextFilteredItemIndex;
nextPosition1 =
itemInfoOfNewSourceIndexNextFilteredItemPosition != itemInfoOfOldSourceIndexFilteredPosition
? itemInfoOfNewSourceIndexNextFilteredItemPosition
: itemInfoOfOldSourceIndex.NextFilteredItemPosition;
newFilteredIndex1 = oldSourceIndex < newSourceIndex1
? itemInfoOfNewSourceIndexNextFilteredItemPosition.Index - 1
: itemInfoOfNewSourceIndexNextFilteredItemPosition.Index;
}
else
{
nextPosition1 = oldSourceIndex < newSourceIndex1
? itemInfoOfNewSourceIndexNextFilteredItemPosition
: itemInfoOfNewSourceIndexFilteredPosition;
newFilteredIndex1 = itemInfoOfNewSourceIndexFilteredPosition.Index;
}
filteredPositions.Move(
oldFilteredIndex,
newFilteredIndex1);
modifyNextFilteredItemIndex(oldSourceIndex,
itemInfoOfOldSourceIndex.NextFilteredItemPosition, filteringItemInfos);
sourcePositions.Move(oldSourceIndex, newSourceIndex1);
itemInfoOfOldSourceIndex.NextFilteredItemPosition = nextPosition1;
modifyNextFilteredItemIndex(newSourceIndex1, newPosition1, filteringItemInfos);
current.baseMoveItem(oldFilteredIndex, newFilteredIndex1);
}
else
{
nextPosition1 = oldSourceIndex < newSourceIndex1
? itemInfoOfNewSourceIndexNextFilteredItemPosition
: (itemInfoOfNewSourceIndexFilteredPosition ?? itemInfoOfNewSourceIndexNextFilteredItemPosition);
itemInfoOfOldSourceIndex.NextFilteredItemPosition = nextPosition1;
sourcePositions.Move(oldSourceIndex, newSourceIndex1);
}
}
}
private void processSource(bool replaceSource)
{
int originalCount = _items.Count;
if (_sourceReadAndSubscribed)
{
Utils.disposeExpressionItemInfos(_itemInfos, _predicateExpressionCallCount, this);
Utils.removeDownstreamConsumedComputing(_itemInfos, this);
_filteredPositions = new Positions <Position>(new List <Position>(_initialCapacity));
Utils.disposeSource(
_sourceScalar,
_source,
out _itemInfos,
out _sourcePositions,
_sourceAsList,
handleSourceCollectionChanged,
replaceSource);
_sourceReadAndSubscribed = false;
}
if (replaceSource)
{
Utils.replaceSource(ref _source, _sourceScalar, _downstreamConsumedComputings, _consumers, this, out _sourceAsList, false);
}
if (_source != null && _isActive)
{
if (replaceSource)
{
Utils.subscribeSource(
_source,
ref _sourceAsList,
ref _rootSourceWrapper,
ref _lastProcessedSourceTickTackVersion,
handleSourceCollectionChanged);
}
Position nextItemPosition = _filteredPositions.Add();
int count = _sourceAsList.Count;
TSourceItem[] sourceCopy = new TSourceItem[count];
_sourceAsList.CopyTo(sourceCopy, 0);
int insertingIndex = 0;
int sourceIndex;
for (sourceIndex = 0; sourceIndex < count; sourceIndex++)
{
TSourceItem sourceItem = sourceCopy[sourceIndex];
Position currentFilteredItemPosition = null;
FilteringItemInfo itemInfo = registerSourceItem(sourceItem, sourceIndex, null, null);
if (_thisAsFiltering.applyPredicate(sourceItem, itemInfo.PredicateFunc))
{
if (originalCount > insertingIndex)
{
_items[insertingIndex++] = sourceItem;
}
else
{
_items.Insert(insertingIndex++, sourceItem);
}
currentFilteredItemPosition = nextItemPosition;
nextItemPosition = _filteredPositions.Add();
}
itemInfo.FilteredPosition = currentFilteredItemPosition;
itemInfo.NextFilteredItemPosition = nextItemPosition;
}
for (int index = originalCount - 1; index >= insertingIndex; index--)
{
_items.RemoveAt(index);
}
_sourceReadAndSubscribed = true;
}
else
{
_items.Clear();
}
reset();
}