PyAPI: support returning non ID types when accessing Context.property

Previously accessing properties without an associated ID would return
None, even when the non-ID data was available.

Ref !116981

doc/python_api/examples/bpy.context.property.py

@@ -1,6 +1,11 @@
 """
 Get the property associated with a hovered button.
-Returns a tuple of the datablock, data path to the property, and array index.
+Returns a tuple of the data-block, data path to the property, and array index.
+
+.. note::
+
+   When the property doesn't have an associated :class:`bpy.types.ID` non-ID data may be returned.
+   This may occur when accessing windowing data, for example, operator properties.
 """
 
 # Example inserting keyframe for the hovered property.

doc/python_api/sphinx_doc_gen.py

@@ -1217,7 +1217,7 @@ context_type_map = {
     "particle_settings": ("ParticleSettings", False),
     "particle_system": ("ParticleSystem", False),
     "particle_system_editable": ("ParticleSystem", False),
-    "property": ("(:class:`bpy.types.ID`, :class:`string`, :class:`int`)", False),
+    "property": ("(:class:`bpy.types.AnyType`, :class:`string`, :class:`int`)", False),
     "pointcloud": ("PointCloud", False),
     "pose_bone": ("PoseBone", False),
     "pose_object": ("Object", False),

source/blender/python/intern/bpy_rna.cc

@@ -4422,19 +4422,36 @@ static PyObject *pyrna_struct_getattro(BPy_StructRNA *self, PyObject *pyname)
             break;
           }
           case CTX_DATA_TYPE_PROPERTY: {
-            char *path_str = nullptr;
+            if (newprop != nullptr) {
-            if ((newprop != nullptr) && (newptr.owner_id != nullptr) &&
-                (path_str = RNA_path_from_ID_to_property(&newptr, newprop)))
-            {
               /* Create pointer to parent ID, and path from ID to property. */
-              PointerRNA idptr = RNA_id_pointer_create(newptr.owner_id);
+              PointerRNA idptr;
-              ret = PyTuple_New(3);
-              PyTuple_SET_ITEMS(ret,
-                                pyrna_struct_CreatePyObject(&idptr),
-                                PyUnicode_FromString(path_str),
-                                PyLong_FromLong(newindex));
 
-              MEM_freeN(path_str);
+              PointerRNA *base_ptr;
+              char *path_str;
+
+              if (newptr.owner_id) {
+                idptr = RNA_id_pointer_create(newptr.owner_id);
+                path_str = RNA_path_from_ID_to_property(&idptr, newprop);
+                base_ptr = &idptr;
+              }
+              else {
+                path_str = RNA_path_from_ptr_to_property_index(&newptr, newprop, 0, -1);
+                base_ptr = &newptr;
+              }
+
+              if (path_str) {
+                ret = PyTuple_New(3);
+                PyTuple_SET_ITEMS(ret,
+                                  pyrna_struct_CreatePyObject(base_ptr),
+                                  PyUnicode_FromString(path_str),
+                                  PyLong_FromLong(newindex));
+
+                MEM_freeN(path_str);
+              }
+              else {
+                ret = Py_None;
+                Py_INCREF(ret);
+              }
             }
             else {
               ret = Py_None;