From 4e014d1a10b795d0436eda4ab612685dc054536c Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Thu, 13 May 2021 15:11:18 +1000
Subject: [PATCH] New utility functions for copying and deep copying IFC
 elements

---
 .../ifcopenshell/util/element.py              | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/ifcopenshell-python/ifcopenshell/util/element.py b/src/ifcopenshell-python/ifcopenshell/util/element.py
index b232721482..df8c72cd92 100644
--- a/src/ifcopenshell-python/ifcopenshell/util/element.py
+++ b/src/ifcopenshell-python/ifcopenshell/util/element.py
@@ -1,3 +1,6 @@
+import ifcopenshell
+
+
 def get_psets(element):
     psets = {}
     try:
@@ -134,6 +137,29 @@ def remove_deep(ifc_file, element):
     ifc_file.unbatch()
 
 
+def copy(ifc_file, element):
+    new = ifc_file.create_entity(element.is_a())
+    for i, attribute in enumerate(element):
+        if attribute is None:
+            continue
+        new[i] = attribute
+    return new
+
+
+def copy_deep(ifc_file, element):
+    new = ifc_file.create_entity(element.is_a())
+    for i, attribute in enumerate(element):
+        if attribute is None:
+            continue
+        if isinstance(attribute, ifcopenshell.entity_instance):
+            attribute = copy_deep(ifc_file, attribute)
+        elif isinstance(attribute, tuple) and attribute and isinstance(attribute[0], ifcopenshell.entity_instance):
+            for j, item in enumerate(attribute):
+                attribute[j] = copy_deep(ifc_file, item)
+        new[i] = attribute
+    return new
+
+
 def get_representation(element, context, subcontext=None, target_view=None):
     if element.is_a("IfcProduct") and element.Representation:
         for r in element.Representation.Representations: