First Commit

2026-05-31 10:17:09 +07:00
commit 17a9c69379
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+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+import ifcopenshell
+import ifcopenshell.util.element
+
+
+def remove_pset(
+    file: ifcopenshell.file, product: ifcopenshell.entity_instance, pset: ifcopenshell.entity_instance
+) -> None:
+    """Removes a property set from a product
+
+    All properties that are part of this property set are also removed.
+
+    :param product: The IfcObject to remove the property set from.
+    :param pset: The IfcPropertySet or IfcElementQuantity to remove.
+    :return: None
+
+    Example:
+
+    .. code:: python
+
+        # Let's imagine we have a new wall type with a property set.
+        wall_type = ifcopenshell.api.root.create_entity(model, ifc_class="IfcWallType")
+        pset = ifcopenshell.api.pset.add_pset(model, product=wall_type, name="Pset_WallCommon")
+
+        # Remove it!
+        ifcopenshell.api.pset.remove_pset(model, product=wall_type, pset=pset)
+    """
+    to_purge = []
+    should_remove_pset = True
+    for inverse in file.get_inverse(pset):
+        if inverse.is_a("IfcRelDefinesByProperties"):
+            if not inverse.RelatedObjects or len(inverse.RelatedObjects) == 1:
+                to_purge.append(inverse)
+            else:
+                related_objects = list(inverse.RelatedObjects)
+                related_objects.remove(product)
+                inverse.RelatedObjects = related_objects
+                should_remove_pset = False
+    if should_remove_pset:
+        properties = []  # Predefined psets have no properties
+        if pset.is_a("IfcPropertySet"):
+            properties = pset.HasProperties or []
+        elif pset.is_a("IfcQuantitySet"):
+            properties = pset.Quantities or []
+        elif pset.is_a() in ("IfcMaterialProperties", "IfcProfileProperties"):
+            properties = pset.Properties or []
+        for prop in properties:
+            if file.get_total_inverses(prop) != 1:
+                continue
+            if prop.is_a("IfcPropertyEnumeratedValue"):
+                enumeration = prop.EnumerationReference
+                if enumeration and file.get_total_inverses(enumeration) == 1:
+                    file.remove(enumeration)
+            file.remove(prop)
+        # IfcMaterialProperties and IfcProfileProperties don't have OwnerHistory
+        history = getattr(pset, "OwnerHistory", None)
+        file.remove(pset)
+        if history:
+            ifcopenshell.util.element.remove_deep2(file, history)
+    for element in to_purge:
+        history = getattr(element, "OwnerHistory", None)
+        file.remove(element)
+        if history:
+            ifcopenshell.util.element.remove_deep2(file, history)