73 lines
2.8 KiB
Python
73 lines
2.8 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcOpenShell.
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#
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# IfcOpenShell is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# IfcOpenShell is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
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import ifcopenshell
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import ifcopenshell.api.owner
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import ifcopenshell.util.element
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def unassign_declaration(
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file: ifcopenshell.file,
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definitions: list[ifcopenshell.entity_instance],
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relating_context: ifcopenshell.entity_instance,
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) -> None:
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"""Unassigns a list of objects from a project or project library
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Typically used to remove an asset from a project library.
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:param definitions: The list of objects you want to undeclare.
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Typically a list of assets.
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:param relating_context: The IfcProject, or more commonly the
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IfcProjectLibrary that you want the object to no longer be part of.
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:return: None
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Example:
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.. code:: python
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# Programmatically generate a library. You could do this visually too.
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library = ifcopenshell.api.project.create_file()
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root = ifcopenshell.api.root.create_entity(library, ifc_class="IfcProject", name="Demo Library")
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context = ifcopenshell.api.root.create_entity(library,
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ifc_class="IfcProjectLibrary", name="Demo Library")
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# It's necessary to say our library is part of our project.
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ifcopenshell.api.project.assign_declaration(library, definitions=[context], relating_context=root)
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# Remove the library from our project
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ifcopenshell.api.project.unassign_declaration(library, definitions=[context], relating_context=root)
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"""
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settings = {
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"definitions": definitions,
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"relating_context": relating_context,
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}
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definitions = set(settings["definitions"])
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rels = {rel for obj in definitions if (rel := next(iter(obj.HasContext), None))}
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for rel in rels:
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related_definitions = set(rel.RelatedDefinitions) - definitions
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if related_definitions:
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rel.RelatedDefinitions = list(related_definitions)
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ifcopenshell.api.owner.update_owner_history(file, element=rel)
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else:
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history = rel.OwnerHistory
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file.remove(rel)
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if history:
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ifcopenshell.util.element.remove_deep2(file, history)
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