private static DxfHandle AssignHandles(IDxfItemInternal item, DxfHandle nextHandle, DxfHandle ownerHandle, HashSet <IDxfItemInternal> visitedItems)
{
if (item == null || !visitedItems.Add(item))
{
return(nextHandle);
}
Debug.Assert(item.Handle.Value == 0);
item.Handle = new DxfHandle(nextHandle.Value);
nextHandle = new DxfHandle(nextHandle.Value + 1);
if (item.OwnerHandle.Value == 0 && ownerHandle.Value != 0)
{
item.OwnerHandle = ownerHandle;
}
foreach (var child in item.GetPointers().Where(c => c.Item != null))
{
var childItem = (IDxfItemInternal)child.Item;
var parentHandle = GetParentHandle(item, childItem);
nextHandle = AssignHandles(childItem, nextHandle, parentHandle, visitedItems);
child.Handle = childItem.Handle;
childItem.OwnerHandle = parentHandle;
}
return(nextHandle);
}
public static DxfHandle AssignHandles(DxfFile file)
{
var visitedItems = new HashSet <IDxfItemInternal>();
foreach (var item in file.GetFileItems())
{
ClearPointers(item, visitedItems);
}
visitedItems.Clear();
var nextPointer = new DxfHandle(1);
foreach (var item in file.GetFileItems().Where(i => i != null))
{
nextPointer = AssignHandles(item, nextPointer, default(DxfHandle), visitedItems);
foreach (var child in item.GetChildItems().Where(c => c != null))
{
var parentHandle = GetParentHandle(item, child);
nextPointer = AssignHandles(child, nextPointer, parentHandle, visitedItems);
SetOwner(child, item, isWriting: true);
}
}
return(nextPointer);
}
public static string HandleString(DxfHandle handle)
{
return(handle.ToString());
}
public static DxfHandle HandleString(string s)
{
DxfHandle.TryParse(s, out var result);
return(result);
}
private static string HandleString(DxfHandle handle)
{
return(DxfCommonConverters.HandleString(handle));
}
protected static string HandleString(DxfHandle handle)
{
return(DxfCommonConverters.HandleString(handle));
}
public DxfPointer(DxfHandle handle, IDxfItem item)
{
Handle = handle;
Item = item;
}
public DxfPointer(DxfHandle handle)
: this(handle, null)
{
}