Enable (deep) copy of overrides.

This commit enables basic copy of overrides on generic ID level, as well
as from (deep) copy operators for objects and collections.

So e.g. if your linked overridden caracter is in a collection, you can
now (from the outliner) Duplicate that override collection to get a new
overriding copy of the character.

We still need operators (new or modifying existing ones) to handle that
from 3DView e.g.

Note that deep copy code for objects/collections (and incidently
animdata) had to be modified to avoid duplicating/making local IDs that
remain linked ones being used by overrides ones.

1 files changed, 12 insertions, 9 deletions

diff --git a/source/blender/blenkernel/intern/lib_override.c b/source/blender/blenkernel/intern/lib_override.c
index 8d1a4e3594c..d16428ccd60 100644
--- a/source/blender/blenkernel/intern/lib_override.c
+++ b/source/blender/blenkernel/intern/lib_override.c
@@ -92,7 +92,7 @@ IDOverrideLibrary *BKE_lib_override_library_init(ID *local_id, ID *reference_id)
 
   if (ancestor_id != NULL && ancestor_id->override_library != NULL) {
     /* Original ID has a template, use it! */
-    BKE_lib_override_library_copy(local_id, ancestor_id);
+    BKE_lib_override_library_copy(local_id, ancestor_id, true);
     if (local_id->override_library->reference != reference_id) {
       id_us_min(local_id->override_library->reference);
       local_id->override_library->reference = reference_id;
@@ -110,8 +110,8 @@ IDOverrideLibrary *BKE_lib_override_library_init(ID *local_id, ID *reference_id)
   return local_id->override_library;
 }
 
-/** Deep copy of a whole override from \a src_id to \a dst_id. */
-void BKE_lib_override_library_copy(ID *dst_id, const ID *src_id)
+/** Shalow or deep copy of a whole override from \a src_id to \a dst_id. */
+void BKE_lib_override_library_copy(ID *dst_id, const ID *src_id, const bool do_full_copy)
 {
   BLI_assert(src_id->override_library != NULL);
 
@@ -138,12 +138,15 @@ void BKE_lib_override_library_copy(ID *dst_id, const ID *src_id)
                                             (ID *)src_id;
   id_us_plus(dst_id->override_library->reference);
 
-  BLI_duplicatelist(&dst_id->override_library->properties, &src_id->override_library->properties);
-  for (IDOverrideLibraryProperty *op_dst = dst_id->override_library->properties.first,
-                                 *op_src = src_id->override_library->properties.first;
-       op_dst;
-       op_dst = op_dst->next, op_src = op_src->next) {
-    lib_override_library_property_copy(op_dst, op_src);
+  if (do_full_copy) {
+    BLI_duplicatelist(&dst_id->override_library->properties,
+                      &src_id->override_library->properties);
+    for (IDOverrideLibraryProperty *op_dst = dst_id->override_library->properties.first,
+                                   *op_src = src_id->override_library->properties.first;
+         op_dst;
+         op_dst = op_dst->next, op_src = op_src->next) {
+      lib_override_library_property_copy(op_dst, op_src);
+    }
   }
 
   dst_id->tag &= ~LIB_TAG_OVERRIDE_LIBRARY_REFOK;