LibOverride: Add operator to convert a proxy object into an override.

In the end the process is surpringly simple, we only need to manually
convert the proxy itself into an override (which is trivial), and then
run common code with the default 'make override' operation.

Fix T81059: Add operator to convert proxies to library overrides.

3 files changed, 50 insertions, 0 deletions

diff --git a/source/blender/editors/object/object_intern.h b/source/blender/editors/object/object_intern.h
index 0a243a56dee..d0c6134bab5 100644
--- a/source/blender/editors/object/object_intern.h
+++ b/source/blender/editors/object/object_intern.h
@@ -63,6 +63,7 @@ void OBJECT_OT_track_set(struct wmOperatorType *ot);
 void OBJECT_OT_track_clear(struct wmOperatorType *ot);
 void OBJECT_OT_make_local(struct wmOperatorType *ot);
 void OBJECT_OT_make_override_library(struct wmOperatorType *ot);
+void OBJECT_OT_convert_proxy_to_override(struct wmOperatorType *ot);
 void OBJECT_OT_make_single_user(struct wmOperatorType *ot);
 void OBJECT_OT_make_links_scene(struct wmOperatorType *ot);
 void OBJECT_OT_make_links_data(struct wmOperatorType *ot);
diff --git a/source/blender/editors/object/object_ops.c b/source/blender/editors/object/object_ops.c
index 390770d5c5c..3fc29f3147b 100644
--- a/source/blender/editors/object/object_ops.c
+++ b/source/blender/editors/object/object_ops.c
@@ -81,6 +81,7 @@ void ED_operatortypes_object(void)
   WM_operatortype_append(OBJECT_OT_track_clear);
   WM_operatortype_append(OBJECT_OT_make_local);
   WM_operatortype_append(OBJECT_OT_make_override_library);
+  WM_operatortype_append(OBJECT_OT_convert_proxy_to_override);
   WM_operatortype_append(OBJECT_OT_make_single_user);
   WM_operatortype_append(OBJECT_OT_make_links_scene);
   WM_operatortype_append(OBJECT_OT_make_links_data);
diff --git a/source/blender/editors/object/object_relations.c b/source/blender/editors/object/object_relations.c
index 4adf1a8d9f2..9750eff677d 100644
--- a/source/blender/editors/object/object_relations.c
+++ b/source/blender/editors/object/object_relations.c
@@ -2490,6 +2490,54 @@ void OBJECT_OT_make_override_library(wmOperatorType *ot)
   ot->prop = prop;
 }
 
+static bool convert_proxy_to_override_poll(bContext *C)
+{
+  Object *obact = CTX_data_active_object(C);
+
+  return obact != NULL && obact->proxy != NULL;
+}
+
+static int convert_proxy_to_override_exec(bContext *C, wmOperator *UNUSED(op))
+{
+  Main *bmain = CTX_data_main(C);
+  Scene *scene = CTX_data_scene(C);
+  ViewLayer *view_layer = CTX_data_view_layer(C);
+
+  BKE_main_id_tag_all(bmain, LIB_TAG_DOIT, false);
+
+  Object *ob_proxy = CTX_data_active_object(C);
+  Object *ob_proxy_group = ob_proxy->proxy_group;
+  const bool is_override_instancing_object = ob_proxy_group != NULL;
+
+  const bool success = BKE_lib_override_library_proxy_convert(bmain, scene, view_layer, ob_proxy);
+
+  /* Remove the instance empty from this scene, the items now have an overridden collection
+   * instead. */
+  if (success && is_override_instancing_object) {
+    ED_object_base_free_and_unlink(bmain, scene, ob_proxy_group);
+  }
+
+  DEG_id_tag_update(&CTX_data_scene(C)->id, ID_RECALC_BASE_FLAGS | ID_RECALC_COPY_ON_WRITE);
+  WM_event_add_notifier(C, NC_WINDOW, NULL);
+
+  return success ? OPERATOR_FINISHED : OPERATOR_CANCELLED;
+}
+
+void OBJECT_OT_convert_proxy_to_override(wmOperatorType *ot)
+{
+  /* identifiers */
+  ot->name = "Convert Proxy To Override";
+  ot->description = "Convert a proxy to a local library override";
+  ot->idname = "OBJECT_OT_convert_proxy_to_override";
+
+  /* api callbacks */
+  ot->exec = convert_proxy_to_override_exec;
+  ot->poll = convert_proxy_to_override_poll;
+
+  /* flags */
+  ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+}
+
 /** \} */
 
 /* ------------------------------------------------------------------- */