Fix T53843: Error opening online manual

release/scripts/startup/bl_operators/wm.py

@@ -906,6 +906,15 @@ class WM_OT_path_open(Operator):
 
 
 def _wm_doc_get_id(doc_id, do_url=True, url_prefix=""):
+
+    def operator_exists_pair(a, b):
+        # Not fast, this is only for docs.
+        return b in dir(getattr(bpy.ops, a))
+
+    def operator_exists_single(a):
+        a, b = a.partition("_OT_")[::2]
+        return operator_exists_pair(a.lower(), b)
+
     id_split = doc_id.split(".")
     url = rna = None
 
@@ -919,7 +928,7 @@ def _wm_doc_get_id(doc_id, do_url=True, url_prefix=""):
         class_name, class_prop = id_split
 
         # an operator (common case - just button referencing an op)
-        if hasattr(bpy.types, class_name.upper() + "_OT_" + class_prop):
+        if operator_exists_pair(class_name, class_prop):
             if do_url:
                 url = (
                     "%s/bpy.ops.%s.html#bpy.ops.%s.%s" %
@@ -927,14 +936,7 @@ def _wm_doc_get_id(doc_id, do_url=True, url_prefix=""):
                 )
             else:
                 rna = "bpy.ops.%s.%s" % (class_name, class_prop)
-        else:
+        elif operator_exists_single(class_name):
-            rna_class = getattr(bpy.types, class_name)
-
-            # an operator setting (selected from a running operator), rare case
-            # note: Py defined operators are subclass of Operator,
-            #       C defined operators are subclass of OperatorProperties.
-            #       we may need to check on this at some point.
-            if issubclass(rna_class, (bpy.types.Operator, bpy.types.OperatorProperties)):
             # note: ignore the prop name since we don't have a way to link into it
             class_name, class_prop = class_name.split("_OT_", 1)
             class_name = class_name.lower()
@@ -947,6 +949,7 @@ def _wm_doc_get_id(doc_id, do_url=True, url_prefix=""):
                 rna = "bpy.ops.%s.%s" % (class_name, class_prop)
         else:
             # an RNA setting, common case
+            rna_class = getattr(bpy.types, class_name)
 
             # detect if this is a inherited member and use that name instead
             rna_parent = rna_class.bl_rna