internal void InsertItems(object parent, List <object> items, int itemsLevel, ViewItem target)
{
if (items == null || items.Count == 0 || (parent == this && target != null && target.Selected))
{
return;
}
if (ItemsCollection.Sort.SortType != SortProperties.SortTypes.None)
{
MessageBox.Show("Корректная вставка объектов возможна только после отмены сортировки");
return;
}
if (ItemsCollection.Filter.Any)
{
MessageBox.Show("Корректная вставка объектов возможна только после отмены фильтрации");
return;
}
List <UndoRedoManager.RemoveCommand> removeCommands = null;
UndoRedoManager.PasteCommand pasteCommand = null;
IsInserting = true;
bool select = false;
if (parent == this)
{
removeCommands = Remove(false, true);
}
if (ItemsCollection.Count == 0)
{
if (PasteOptions.PasteType == PasteOptions.PasteTypes.InChildren || (PasteOptions.PasteType == PasteOptions.PasteTypes.InLevel && (itemsLevel == 1 || itemsLevel == int.MaxValue)))
{
ItemsCollection.Insert(0, items);
if (IsUndoRedo)
{
pasteCommand = new UndoRedoManager.PasteCommand(items, null, 0);
}
select = true;
}
}
else if ((target == null ? ItemsCollection.Count - 1 : target.Index) is int index && index >= 0)
{
if (PasteOptions.PasteType == PasteOptions.PasteTypes.InLevel)
{
object selectItem = ItemsCollection.GetItem(index);
IChildCollection selectColl = selectItem as IChildCollection;
if (selectColl == null || itemsLevel <= selectColl.DropLevel)
{
while (selectColl != null && itemsLevel != selectColl.DropLevel)
{
selectColl = selectColl.Parent as IChildCollection;
}
if (selectColl == null || (itemsLevel == 1 && selectColl.DropLevel == 1))
{
if (ItemsCollection.SourceContainer.IndexOf(selectColl == null ? selectItem : selectColl) is int iIndex && iIndex != -1)
{
ItemsCollection.Insert(iIndex + 1, items);
if (IsUndoRedo)
{
pasteCommand = new UndoRedoManager.PasteCommand(items, null, iIndex + 1);
}
select = true;
}
}
else if (selectColl.DropLevel == itemsLevel && selectColl.Parent is IChildCollection pcoll)
{
for (int j = 0; j < pcoll.Count; j++)
{
if (pcoll[j] == selectColl)
{
pcoll.InsertRange(j + 1, items);
if (IsUndoRedo)
{
pasteCommand = new UndoRedoManager.PasteCommand(items, pcoll, j + 1);
}
select = true;
break;
}
}
}
}
else if (selectColl != null && itemsLevel == selectColl.DropLevel + 1)
{
int iIndex = selectColl.Count;
selectColl.InsertRange(iIndex, items);
selectColl.Dropped = true;
if (IsUndoRedo)
{
pasteCommand = new UndoRedoManager.PasteCommand(items, selectColl, iIndex);
}
select = true;
}
}
else if (PasteOptions.PasteType == PasteOptions.PasteTypes.InChildren && ItemsCollection.GetItem(index) is IChildCollection collection)
{
int iIndex = collection.Count - 1;
collection.InsertRange(iIndex, items);
collection.Dropped = true;
if (IsUndoRedo)
{
pasteCommand = new UndoRedoManager.PasteCommand(items, collection, iIndex);
}
select = true;
}
}
if (select)
{
Select(items);
}
if (IsUndoRedo && (removeCommands != null || pasteCommand != null))
{
UndoRedoManager.RegistredNewCommand(new UndoRedoManager.MoveCommand(removeCommands, pasteCommand));
}
IsInserting = false;
}