fix [#30905] Operator preset save doesn't serialize PropertyGroups

fix based on patch by Julien Rivaud (frnchfrgg), but re-written a bit differently not to be operator specific.

1 files changed, 27 insertions, 8 deletions

diff --git a/release/scripts/startup/bl_operators/presets.py b/release/scripts/startup/bl_operators/presets.py
index 6297945f8bd..dceeae07500 100644
--- a/release/scripts/startup/bl_operators/presets.py
+++ b/release/scripts/startup/bl_operators/presets.py
@@ -93,6 +93,29 @@ class AddPresetBase():
                                            filepath,
                                            preset_menu_class.preset_xml_map)
                 else:
+
+                    def rna_recursiev_attr_expand(value, rna_path_step, level):
+                        if isinstance(value, bpy.types.PropertyGroup):
+                            for sub_value_attr in value.bl_rna.properties.keys():
+                                if sub_value_attr == "rna_type":
+                                    continue
+                                sub_value = getattr(value, sub_value_attr)
+                                rna_recursiev_attr_expand(sub_value, "%s.%s" % (rna_path_step, sub_value_attr), level)
+                        elif type(value).__name__ == "bpy_prop_collection_idprop":  # could use nicer method
+                            file_preset.write("%s.clear()\n" % rna_path_step)
+                            for sub_value in value:
+                                file_preset.write("item_sub_%d = %s.add()\n" % (level, rna_path_step))
+                                rna_recursiev_attr_expand(sub_value, "item_sub_%d" % level, level + 1)
+                        else:
+                            # convert thin wrapped sequences
+                            # to simple lists to repr()
+                            try:
+                                value = value[:]
+                            except:
+                                pass
+
+                            file_preset.write("%s = %r\n" % (rna_path_step, value))
+
                     file_preset = open(filepath, 'w')
                     file_preset.write("import bpy\n")
 
@@ -104,14 +127,10 @@ class AddPresetBase():
 
                     for rna_path in self.preset_values:
                         value = eval(rna_path)
-                        # convert thin wrapped sequences
-                        # to simple lists to repr()
-                        try:
-                            value = value[:]
-                        except:
-                            pass
-
-                        file_preset.write("%s = %r\n" % (rna_path, value))
+                        rna_recursiev_attr_expand(value, rna_path, 1)
+
+                            
+
 
                     file_preset.close()