LibOverride: Add initial System Override flag.

This merely adds the flag, exposes it in RMA, and uses it in some of the
most common 'is editable' checks (RNA, `BASE_EDITABLE` macro...).

Next step: do_version and defining systemoverrides at creation.

Ref: {T95707}.

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/lib_override.c b/source/blender/blenkernel/intern/lib_override.c
index cd5855af043..c0d49105dad 100644
--- a/source/blender/blenkernel/intern/lib_override.c
+++ b/source/blender/blenkernel/intern/lib_override.c
@@ -276,6 +276,18 @@ bool BKE_lib_override_library_is_user_edited(struct ID *id)
   return false;
 }
 
+bool BKE_lib_override_library_is_system_defined(Main *bmain, ID *id)
+{
+
+  if (ID_IS_OVERRIDE_LIBRARY(id)) {
+    ID *override_owner_id;
+    lib_override_get(bmain, id, &override_owner_id);
+    return (override_owner_id->override_library->flag & IDOVERRIDE_LIBRARY_FLAG_SYSTEM_DEFINED) !=
+           0;
+  }
+  return false;
+}
+
 ID *BKE_lib_override_library_create_from_id(Main *bmain,
                                             ID *reference_id,
                                             const bool do_tagged_remap)