Support for using CadQueryNode inside cq-editor

Author: lfagundes

solid_node/node/adapters/cadquery.py

@@ -1,11 +1,34 @@
 import os
+import sys
 import time
+import inspect
 import cadquery as cq
 from solid2 import import_stl
 from solid_node.node.leaf import LeafNode
 
 
-class CadQueryNode(LeafNode):
+def running_inside_cq_editor() -> bool:
+    """Detect if we are running inside CQ-Editor"""
+    for frame in inspect.stack():
+        module = inspect.getmodule(frame.frame)
+        if module and module.__name__ == 'cq_editor.__main__':
+            return True
+    return False
+
+
+class TypeDecider(type):
+    """This metaclass will check if we are in the context of
+    CQ-editor, if so, use no base classes, otherwise inherit
+    LeafNode."""
+    def __new__(mcs, name, bases, namespace):
+        if running_inside_cq_editor():
+            bases = tuple()
+        else:
+            bases = (LeafNode,)
+        return super().__new__(mcs, name, bases, namespace)
+
+
+class CadQueryNode(metaclass=TypeDecider):
     """
     Represents a 3D object created using the CadQuery tool.
     """