Bonsai: add "Share Annotations" option to Duplicate Drawing

When duplicating a drawing with "Should Duplicate Annotations" enabled, a
new "Share Annotations" toggle lets the manual annotations be shared with
the new drawing (multi-group membership - editing one updates both) instead
of being copied into independent entities. Auto-generated tags
(grid/section/storey) are always copied, since they are regenerated per
drawing and cannot be shared.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/bonsai/bonsai/bim/module/drawing/operator.py

@@ -202,6 +202,14 @@ class DuplicateDrawing(bpy.types.Operator, tool.Ifc.Operator):
     bl_options = {"REGISTER", "UNDO"}
     drawing: bpy.props.IntProperty()
     should_duplicate_annotations: bpy.props.BoolProperty(name="Should Duplicate Annotations", default=False)
+    share_annotations: bpy.props.BoolProperty(
+        name="Share Annotations",
+        description=(
+            "Assign the same annotations to the new drawing (shared - editing one updates both) "
+            "instead of creating independent copies. Auto-generated tags are always copied"
+        ),
+        default=False,
+    )
 
     @classmethod
     def poll(cls, context):
@@ -216,8 +224,11 @@ class DuplicateDrawing(bpy.types.Operator, tool.Ifc.Operator):
 
     def draw(self, context):
         assert self.layout
-        row = self.layout
+        layout = self.layout
-        row.prop(self, "should_duplicate_annotations")
+        layout.prop(self, "should_duplicate_annotations")
+        row = layout.row()
+        row.enabled = self.should_duplicate_annotations
+        row.prop(self, "share_annotations")
 
     def _execute(self, context):
         props = tool.Drawing.get_document_props()
@@ -228,6 +239,7 @@ class DuplicateDrawing(bpy.types.Operator, tool.Ifc.Operator):
             tool.Geometry,
             drawing=tool.Ifc.get().by_id(self.drawing),
             should_duplicate_annotations=self.should_duplicate_annotations,
+            share_annotations=self.share_annotations,
         )
 
 

src/bonsai/bonsai/core/drawing.py

@@ -355,6 +355,7 @@ def duplicate_drawing(
     geometry: type[tool.Geometry],
     drawing: ifcopenshell.entity_instance,
     should_duplicate_annotations: bool = False,
+    share_annotations: bool = False,
 ) -> ifcopenshell.entity_instance:
     drawing_name = drawing_tool.ensure_unique_drawing_name(drawing_tool.get_name(drawing))
     new_drawing = ifc.run("root.copy_class", product=drawing)
@@ -367,8 +368,21 @@ def duplicate_drawing(
     ifc.run("group.edit_group", group=new_group, attributes={"Name": drawing_name, "ObjectType": "DRAWING"})
     ifc.run("group.assign_group", group=new_group, products=[new_drawing])
     if should_duplicate_annotations:
+        source_annotations = [a for a in drawing_tool.get_group_elements(group) if a != drawing]
+        if share_annotations:
+            # Share manual annotations with the new drawing (multi-group membership):
+            # the same entity now belongs to both drawings' groups, so edits propagate.
+            # Auto-generated tags (grid/section/storey) can't be shared - they are
+            # regenerated per drawing - so they are still duplicated.
+            to_share = [a for a in source_annotations if not drawing_tool.is_auto_annotation(a)]
+            to_duplicate = [a for a in source_annotations if drawing_tool.is_auto_annotation(a)]
+            if to_share:
+                ifc.run("group.assign_group", group=new_group, products=to_share)
+        else:
+            to_duplicate = source_annotations
+        if to_duplicate:
             new_annotations: list[ifcopenshell.entity_instance] = []
-        annotation_objs = [ifc.get_object(a) for a in drawing_tool.get_group_elements(group) if a != drawing]
+            annotation_objs = [ifc.get_object(a) for a in to_duplicate]
             old_to_new, _ = geometry.duplicate_ifc_objects(annotation_objs)
             for new_elements in old_to_new.values():
                 # Remove the Blender object, since we haven't actually activated the duplicated drawing