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.api.context
+import ifcopenshell.api.geometry
+import ifcopenshell.util.element
+
+
+def remove_context(file: ifcopenshell.file, context: ifcopenshell.entity_instance) -> None:
+    """Removes an IfcGeometricRepresentationContext
+
+    Any representation geometry that is assigned to the context is also
+    removed. If a context is removed, then any subcontexts are also removed.
+
+    :param context: The IfcGeometricRepresentationContext entity to remove
+    :return: None
+
+    Example:
+
+    .. code:: python
+
+        model = ifcopenshell.api.context.add_context(model, context_type="Model")
+        # Revit had a bug where they incorrectly called the body representation a "Facetation"
+        body = ifcopenshell.api.context.add_context(model,
+            context_type="Model", context_identifier="Facetation", target_view="MODEL_VIEW", parent=model
+        )
+
+        # Let's just get rid of it completely
+        ifcopenshell.api.context.remove_context(model, context=body)
+    """
+    for subcontext in context.HasSubContexts:
+        ifcopenshell.api.context.remove_context(file, context=subcontext)
+
+    if getattr(context, "ParentContext", None):
+        new = context.ParentContext
+        for inverse in file.get_inverse(context):
+            if inverse.is_a("IfcCoordinateOperation"):
+                # Trick to make sure the coordinate operation is not referenced
+                # by a context so we can delete it safely
+                inverse.SourceCRS = inverse.TargetCRS
+                ifcopenshell.util.element.remove_deep2(file, inverse)
+            else:
+                ifcopenshell.util.element.replace_attribute(inverse, context, new)
+        file.remove(context)
+    else:
+        representations_in_context = context.RepresentationsInContext
+        file.remove(context)
+        for rep in representations_in_context:
+            for element in ifcopenshell.util.element.get_elements_by_representation(file, rep):
+                ifcopenshell.api.geometry.unassign_representation(file, product=element, representation=rep)
+            ifcopenshell.api.geometry.remove_representation(file, representation=rep)