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);
}
private ItemInfo registerSourceItem(TSourceItem sourceItem, int index, ItemInfo itemInfo = null)
{
itemInfo = itemInfo == null?_sourcePositions.Insert(index) : _itemInfos[index];
ExpressionWatcher watcher;
if (!_selectorContainsParametrizedObservableComputationsCalls)
{
watcher = new ExpressionWatcher(_selectorExpressionInfo, sourceItem);
}
else
{
Expression <Func <TResultItem> > deparametrizedSelectorExpression =
(Expression <Func <TResultItem> >)_selectorExpression.ApplyParameters(new object[] { sourceItem });
Expression <Func <TResultItem> > selectorExpression =
(Expression <Func <TResultItem> >)
new CallToConstantConverter().Visit(deparametrizedSelectorExpression);
// ReSharper disable once PossibleNullReferenceException
itemInfo.SelectorFunc = selectorExpression.Compile();
watcher = new ExpressionWatcher(ExpressionWatcher.GetExpressionInfo(selectorExpression));
}
watcher.ValueChanged = expressionWatcher_OnValueChanged;
itemInfo.ExpressionWatcher = watcher;
watcher._position = itemInfo;
return(itemInfo);
}
private FilteringItemInfo registerSourceItem(TSourceItem sourceItem, int sourceIndex, Position position,
Position nextItemPosition, ExpressionWatcher watcher = null, Func <bool> predicateFunc = null,
List <IComputingInternal> nestedComputings = null)
{
FilteringItemInfo itemInfo = _sourcePositions.Insert(sourceIndex);
itemInfo.FilteredPosition = position;
itemInfo.NextFilteredItemPosition = nextItemPosition;
if (watcher == null /*&& predicateFunc == null*/)
{
Utils.getItemInfoContent(
new object[] { sourceItem },
out watcher,
out predicateFunc,
out nestedComputings,
_predicateExpression,
out _predicateExpressionCallCount,
this,
_predicateContainsParametrizedObservableComputationsCalls,
_predicateExpressionInfo);
}
itemInfo.PredicateFunc = predicateFunc;
watcher.ValueChanged = _thisAsFiltering.expressionWatcher_OnValueChanged;
watcher._position = itemInfo;
itemInfo.ExpressionWatcher = watcher;
itemInfo.NestedComputings = nestedComputings;
return(itemInfo);
}
private ItemInfo registerSourceItem(TSourceItem sourceItem, int index, ItemInfo itemInfo = null)
{
itemInfo = itemInfo == null?_sourcePositions.Insert(index) : _itemInfos[index];
ExpressionWatcher watcher;
Utils.getItemInfoContent(
new object[] { sourceItem },
out watcher,
out Func <TResultItem> predicateFunc,
out List <IComputingInternal> nestedComputings,
_selectorExpression,
out _selectorExpressionСallCount,
this,
_selectorContainsParametrizedObservableComputationsCalls,
_selectorExpressionInfo);
itemInfo.SelectorFunc = predicateFunc;
itemInfo.NestedComputings = nestedComputings;
watcher.ValueChanged = expressionWatcher_OnValueChanged;
itemInfo.ExpressionWatcher = watcher;
watcher._position = itemInfo;
return(itemInfo);
}
private ItemInfo registerSourceItem(TSourceItem sourceItem, int sourceIndex)
{
ItemInfo itemInfo = _sourcePositions.Insert(sourceIndex);
getNewExpressionWatcherAndPredicateFunc(sourceItem, out ExpressionWatcher watcher, out Func <bool> predicateFunc);
itemInfo.PredicateFunc = predicateFunc;
watcher.ValueChanged = expressionWatcher_OnValueChanged;
watcher._position = itemInfo;
itemInfo.ExpressionWatcher = watcher;
return(itemInfo);
}
private void registerSourceItem(TSourceItem sourceItem, int sourceIndex, bool initializing = false)
{
OrderingItemInfo <TOrderingValue> itemInfo = _sourcePositions.Insert(sourceIndex);
Utils.getItemInfoContent(
new object[] { sourceItem },
out ExpressionWatcher expressionWatcher,
out Func <TOrderingValue> getOrderingValueFunc,
out List <IComputingInternal> nestedComputings,
_orderingValueSelectorExpression,
out _orderingValueSelectorExpressionCallCount,
this,
_orderingValueSelectorContainsParametrizedLiveLinqCalls,
_orderingValueSelectorExpressionInfo);
itemInfo.GetOrderingValueFunc = getOrderingValueFunc;
itemInfo.ExpressionWatcher = expressionWatcher;
itemInfo.NestedComputings = nestedComputings;
TOrderingValue orderingValue = getOrderingValue(itemInfo, sourceItem);
int orderedIndex = getOrderedIndex(orderingValue);
itemInfo.ExpressionWatcher.ValueChanged = expressionWatcher_OnValueChanged;
itemInfo.ExpressionWatcher._position = itemInfo;
OrderedItemInfo <TOrderingValue> orderedItemInfo = _orderedPositions.Insert(orderedIndex);
itemInfo.OrderedItemInfo = orderedItemInfo;
orderedItemInfo.ItemInfo = itemInfo;
_orderingValues.Insert(orderedIndex, orderingValue);
if (_thenOrderingsCount > 0)
{
adjustEqualOrderingValueRangePosition(orderingValue, orderedItemInfo, orderedIndex, orderedIndex - 1, orderedIndex);
}
if (initializing)
{
_items.Insert(orderedIndex, sourceItem);
}
else
{
baseInsertItem(orderedIndex, sourceItem);
}
}
private ItemInfo registerSourceItem(TSourceItem sourceItem, int sourceIndex, Position position, Position nextItemPosition, ExpressionWatcher watcher = null, Func <bool> predicateFunc = null)
{
ItemInfo itemInfo = _sourcePositions.Insert(sourceIndex);
itemInfo.FilteredPosition = position;
itemInfo.NextFilteredItemPosition = nextItemPosition;
if (watcher == null /*&& predicateFunc == null*/)
{
getNewExpressionWatcherAndPredicateFunc(sourceItem, out watcher, out predicateFunc);
}
itemInfo.PredicateFunc = predicateFunc;
watcher.ValueChanged = expressionWatcher_OnValueChanged;
watcher._position = itemInfo;
itemInfo.ExpressionWatcher = watcher;
return(itemInfo);
}
internal static bool ProcessChangeSourceItem <TSourceItem>(int sourceIndex,
TSourceItem sourceItem,
List <FilteringItemInfo> filteringItemInfos,
IFiltering <TSourceItem> filtering,
Positions <Position> filteredPositions,
CollectionComputing <TSourceItem> current,
ExpressionWatcher expressionWatcher)
{
if (expressionWatcher._disposed)
{
return(false);
}
FilteringItemInfo itemInfo = filteringItemInfos[sourceIndex];
bool newPredicateValue = filtering.applyPredicate(sourceItem, itemInfo.PredicateFunc);
bool oldPredicateValue = itemInfo.FilteredPosition != null;
if (newPredicateValue != oldPredicateValue)
{
if (newPredicateValue)
{
int newIndex = itemInfo.NextFilteredItemPosition.Index;
itemInfo.FilteredPosition = filteredPositions.Insert(newIndex);
newIndex = itemInfo.FilteredPosition.Index;
modifyNextFilteredItemIndex(sourceIndex, itemInfo.FilteredPosition, filteringItemInfos);
current.baseInsertItem(newIndex, sourceItem);
return(true);
}
else // if (oldPredicaeValue)
{
int index = itemInfo.FilteredPosition.Index;
filteredPositions.Remove(index);
itemInfo.FilteredPosition = null;
modifyNextFilteredItemIndex(sourceIndex, itemInfo.NextFilteredItemPosition, filteringItemInfos);
current.baseRemoveItem(index);
return(true);
}
}
return(false);
}
private ItemInfo registerSourceItem(TSourceItem sourceItem, int sourceIndex)
{
ItemInfo itemInfo = _sourcePositions.Insert(sourceIndex);
Utils.getItemInfoContent(
new object[] { sourceItem },
out ExpressionWatcher watcher,
out Func <bool> predicateFunc,
out List <IComputingInternal> nestedComputings,
_predicateExpression,
out _predicateExpressionСallCount,
this,
_predicateContainsParametrizedObservableComputationCalls,
_predicateExpressionInfo);
itemInfo.PredicateFunc = predicateFunc;
watcher.ValueChanged = expressionWatcher_OnValueChanged;
watcher._position = itemInfo;
itemInfo.ExpressionWatcher = watcher;
itemInfo.NestedComputings = nestedComputings;
return(itemInfo);
}
private void handleSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
checkConsistent(sender, e);
if (!_rootSourceWrapper && _lastProcessedSourceChangeMarker == _sourceAsList.ChangeMarkerField)
{
return;
}
_handledEventSender = sender;
_handledEventArgs = e;
_lastProcessedSourceChangeMarker = !_lastProcessedSourceChangeMarker;
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
_isConsistent = false;
int newSourceIndex = e.NewStartingIndex;
TSourceItem addedSourceItem = _sourceAsList[newSourceIndex];
Position newItemPosition = null;
Position nextItemPosition;
int?newFilteredIndex = null;
getNewExpressionWatcherAndPredicateFunc(addedSourceItem, out ExpressionWatcher newWatcher, out Func <bool> newPredicateFunc);
if (newSourceIndex < _itemInfos.Count)
{
ItemInfo oldItemInfo = _itemInfos[newSourceIndex];
Position oldItemInfoNextFilteredItemPosition = oldItemInfo.NextFilteredItemPosition;
Position oldItemInfoFilteredPosition = oldItemInfo.FilteredPosition;
if (applyPredicate(addedSourceItem, newPredicateFunc))
{
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);
}
else
{
nextItemPosition = oldItemInfoFilteredPosition ?? oldItemInfoNextFilteredItemPosition;
}
}
else
{
if (applyPredicate(addedSourceItem, newPredicateFunc))
{
newItemPosition = _filteredPositions.List[Count];
newFilteredIndex = Count;
nextItemPosition = _filteredPositions.Add();
}
else
{
//здесь newPositionIndex = null; так и должно быть
nextItemPosition = _filteredPositions.List[Count];
}
}
registerSourceItem(addedSourceItem, newSourceIndex, newItemPosition, nextItemPosition, newWatcher, newPredicateFunc);
if (newFilteredIndex != null)
{
baseInsertItem(newFilteredIndex.Value, addedSourceItem);
}
_isConsistent = true;
raiseConsistencyRestored();
break;
case NotifyCollectionChangedAction.Remove:
unregisterSourceItem(e.OldStartingIndex);
break;
case NotifyCollectionChangedAction.Move:
_isConsistent = false;
int newSourceIndex1 = e.NewStartingIndex;
int oldSourceIndex = e.OldStartingIndex;
if (newSourceIndex1 != oldSourceIndex)
{
ItemInfo itemInfoOfOldSourceIndex = _itemInfos[oldSourceIndex];
ItemInfo itemInfoOfNewSourceIndex = _itemInfos[newSourceIndex1];
Position newPosition1;
Position nextPosition1;
Position itemInfoOfOldSourceIndexFilteredPosition = itemInfoOfOldSourceIndex.FilteredPosition;
Position itemInfoOfNewSourceIndexNextFilteredItemPosition = itemInfoOfNewSourceIndex.NextFilteredItemPosition;
Position itemInfoOfNewSourceIndexFilteredPosition = itemInfoOfNewSourceIndex.FilteredPosition;
if (itemInfoOfOldSourceIndexFilteredPosition != null)
{
int oldFilteredIndex = itemInfoOfOldSourceIndexFilteredPosition.Index;
int newFilteredIndex1;
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);
_sourcePositions.Move(oldSourceIndex, newSourceIndex1);
itemInfoOfOldSourceIndex.NextFilteredItemPosition = nextPosition1;
modifyNextFilteredItemIndex(newSourceIndex1, newPosition1);
baseMoveItem(oldFilteredIndex, newFilteredIndex1);
}
else
{
nextPosition1 = oldSourceIndex < newSourceIndex1
? itemInfoOfNewSourceIndexNextFilteredItemPosition
: (itemInfoOfNewSourceIndexFilteredPosition ?? itemInfoOfNewSourceIndexNextFilteredItemPosition);
itemInfoOfOldSourceIndex.NextFilteredItemPosition = nextPosition1;
_sourcePositions.Move(oldSourceIndex, newSourceIndex1);
}
}
_isConsistent = true;
raiseConsistencyRestored();
break;
case NotifyCollectionChangedAction.Reset:
_isConsistent = false;
initializeFromSource();
_isConsistent = true;
raiseConsistencyRestored();
break;
case NotifyCollectionChangedAction.Replace:
_isConsistent = false;
int sourceIndex = e.NewStartingIndex;
ItemInfo replacingItemInfo = _itemInfos[sourceIndex];
ExpressionWatcher oldExpressionWatcher = replacingItemInfo.ExpressionWatcher;
oldExpressionWatcher.Dispose();
ExpressionWatcher watcher;
Func <bool> predicateFunc;
TSourceItem replacingSourceItem = _sourceAsList[sourceIndex];
getNewExpressionWatcherAndPredicateFunc(replacingSourceItem, out watcher, out predicateFunc);
replacingItemInfo.PredicateFunc = predicateFunc;
watcher.ValueChanged = expressionWatcher_OnValueChanged;
watcher._position = oldExpressionWatcher._position;
replacingItemInfo.ExpressionWatcher = watcher;
if (!processChangeSourceItem(sourceIndex) && replacingItemInfo.FilteredPosition != null)
{
baseSetItem(replacingItemInfo.FilteredPosition.Index, replacingSourceItem);
}
_isConsistent = true;
raiseConsistencyRestored();
break;
}
_isConsistent = false;
if (_deferredExpressionWatcherChangedProcessings != null)
{
while (_deferredExpressionWatcherChangedProcessings.Count > 0)
{
ExpressionWatcher.Raise expressionWatcherRaise = _deferredExpressionWatcherChangedProcessings.Dequeue();
if (!expressionWatcherRaise.ExpressionWatcher._disposed)
{
_handledEventSender = expressionWatcherRaise.EventSender;
_handledEventArgs = expressionWatcherRaise.EventArgs;
processChangeSourceItem(expressionWatcherRaise.ExpressionWatcher._position.Index);
}
}
}
_isConsistent = true;
raiseConsistencyRestored();
_handledEventSender = null;
_handledEventArgs = null;
}