private static void SetChildOwners(IDxfItemInternal item, HashSet <IDxfItemInternal> visitedChildren)
{
foreach (var child in item.GetChildItems())
{
if (child != null && visitedChildren.Add(child))
{
SetOwner(child, item, isWriting: false);
SetChildOwners(child, visitedChildren);
}
}
}
private static void ClearPointers(IDxfItemInternal item, HashSet <IDxfItemInternal> visitedItems)
{
if (item != null && visitedItems.Add(item))
{
item.Handle = 0u;
foreach (var child in item.GetChildItems())
{
ClearPointers(child, visitedItems);
}
}
}
private static void GatherPointers(IDxfItemInternal item, Dictionary <uint, IDxfItemInternal> handleMap, HashSet <IDxfItemInternal> visitedItems)
{
if (item != null && visitedItems.Add(item))
{
if (item.Handle != 0u)
{
handleMap[item.Handle] = item;
}
foreach (var child in item.GetChildItems())
{
GatherPointers(child, handleMap, visitedItems);
}
}
}