Added a magic token to ensure only plugin data can be parsed from the clipboard

core/dumper.py

@@ -1,8 +1,25 @@
-import bpy
+import json
 from copy import copy
 from os.path import abspath
 from pprint import pprint
 
+import bpy
+
+
+format_token = "#FMT:NODE_KIT#"
+
+
+def dump_nkit_format(data: str) -> str:
+    return format_token + json.dumps(data)
+
+
+def parse_nkit_format(data: str) -> str | None:
+    if data.startswith(format_token):
+        print(data[len(format_token):])
+        return json.loads(data[len(format_token):])
+    
+    return None
+
 
 def get_default(prop: bpy.types.Property):
     """Get the default value of a Blender property"""

operators.py

@@ -14,8 +14,7 @@ import bpy
 from bpy.props import BoolProperty, EnumProperty
 from bpy.types import Operator
 
-# from node_kit.core.node_tree import NodeTree
+from .core.dumper import dump_nodes, load_nodes, dump_nkit_format, parse_nkit_format
-from .core.dumper import dump_nodes, load_nodes
 from .core.node_utils import remap_node_group_duplicates
 from .core.pack_nodes import combine_objects, extract_objects
 
@@ -39,7 +38,7 @@ class NODEKIT_OT_copy(Operator):
 
         pprint(ntree_data)
 
-        context.window_manager.clipboard = json.dumps(ntree_data)
+        context.window_manager.clipboard = dump_nkit_format(ntree_data)
 
         self.report({"INFO"}, f"Copied {len(selected_nodes)} selected nodes to system clipboard")
         return {"FINISHED"}
@@ -57,7 +56,7 @@ class NODEKIT_OT_copy_tree(Operator):
 
         pprint(ntree_data)
 
-        context.window_manager.clipboard = json.dumps(ntree_data)
+        context.window_manager.clipboard = dump_nkit_format(ntree_data)
 
         self.report({"INFO"}, f"Copied {len(ntree.nodes)} selected nodes to system clipboard")
         return {"FINISHED"}
@@ -70,7 +69,7 @@ class NODEKIT_OT_paste(Operator):
     bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
-        ntree_data = json.loads(context.window_manager.clipboard)
+        ntree_data = parse_nkit_format(context.window_manager.clipboard)
         load_nodes(ntree_data, context.space_data.edit_tree)
 
         self.report({"INFO"}, f"X node(s) pasted from system clipboard")  # TODO: Ge the number of parsed nodes returned