Refactor IDProperty UI data storage

The storage of IDProperty UI data (min, max, default value, etc) is
quite complicated. For every property, retrieving a single one of these
values involves three string lookups. First for the "_RNA_UI" group
property, then another for a group with the property's name, then for
the data value name. Not only is this inefficient, it's hard to reason
about, unintuitive, and not at all self-explanatory.

This commit replaces that system with a UI data struct directly in the
IDProperty. If it's not used, the only cost is of a NULL pointer. Beyond
storing the description, name, and RNA subtype, derived structs are used
to store type specific UI data like min and max.

Note that this means that addons using (abusing) the `_RNA_UI` custom
property will have to be changed. A few places in the addons repository
will be changed after this commit with D9919.

**Before**
Before, first the _RNA_UI subgroup is retrieved the _RNA_UI group,
then the subgroup for the original property, then specific UI data
is accessed like any other IDProperty.
```
prop = rna_idprop_ui_prop_get(idproperties_owner, "prop_name", create=True)
prop["min"] = 1.0
```

**After**
After, the `id_properties_ui` function for RNA structs returns a python
object specifically for managing an IDProperty's UI data.
```
ui_data = idproperties_owner.id_properties_ui("prop_name")
ui_data.update(min=1.0)
```
In addition to `update`, there are now other functions:
 - `as_dict`: Returns a dictionary of the property's UI data.
 - `clear`: Removes the property's UI data.
 - `update_from`: Copy UI data between properties,
   even if they have different owners.

Differential Revision: https://developer.blender.org/D9697

1 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/makesrna/RNA_access.h b/source/blender/makesrna/RNA_access.h
index b943a8fad5a..abbe609d0ef 100644
--- a/source/blender/makesrna/RNA_access.h
+++ b/source/blender/makesrna/RNA_access.h
@@ -1006,7 +1006,7 @@ int RNA_property_int_get_index(PointerRNA *ptr, PropertyRNA *prop, int index);
 void RNA_property_int_set_array(PointerRNA *ptr, PropertyRNA *prop, const int *values);
 void RNA_property_int_set_index(PointerRNA *ptr, PropertyRNA *prop, int index, int value);
 int RNA_property_int_get_default(PointerRNA *ptr, PropertyRNA *prop);
-bool RNA_property_int_set_default(PointerRNA *ptr, PropertyRNA *prop, int value);
+bool RNA_property_int_set_default(PropertyRNA *prop, int value);
 void RNA_property_int_get_default_array(PointerRNA *ptr, PropertyRNA *prop, int *values);
 int RNA_property_int_get_default_index(PointerRNA *ptr, PropertyRNA *prop, int index);
 
@@ -1018,7 +1018,7 @@ float RNA_property_float_get_index(PointerRNA *ptr, PropertyRNA *prop, int index
 void RNA_property_float_set_array(PointerRNA *ptr, PropertyRNA *prop, const float *values);
 void RNA_property_float_set_index(PointerRNA *ptr, PropertyRNA *prop, int index, float value);
 float RNA_property_float_get_default(PointerRNA *ptr, PropertyRNA *prop);
-bool RNA_property_float_set_default(PointerRNA *ptr, PropertyRNA *prop, float value);
+bool RNA_property_float_set_default(PropertyRNA *prop, float value);
 void RNA_property_float_get_default_array(PointerRNA *ptr, PropertyRNA *prop, float *values);
 float RNA_property_float_get_default_index(PointerRNA *ptr, PropertyRNA *prop, int index);
 
@@ -1028,7 +1028,7 @@ char *RNA_property_string_get_alloc(
 void RNA_property_string_set(PointerRNA *ptr, PropertyRNA *prop, const char *value);
 void RNA_property_string_set_bytes(PointerRNA *ptr, PropertyRNA *prop, const char *value, int len);
 int RNA_property_string_length(PointerRNA *ptr, PropertyRNA *prop);
-void RNA_property_string_get_default(PointerRNA *ptr, PropertyRNA *prop, char *value);
+void RNA_property_string_get_default(PropertyRNA *prop, char *value, int max_len);
 char *RNA_property_string_get_default_alloc(
     PointerRNA *ptr, PropertyRNA *prop, char *fixedbuf, int fixedlen, int *r_len);
 int RNA_property_string_default_length(PointerRNA *ptr, PropertyRNA *prop);