Outliner: Avoid rebuilding tree on selection/active changes

We can avoid the rather expensive outliner tree rebuilds and only redraw
if nothing but the selection or active item changes. This should give a
bit of speedup for heavy scenes.

For this to work I had to correct a few notifiers, some were only
sending selection/active change notifiers that actually did things like
adding objects. I also added a more precise notifier type for when the
active collection changes. At the notifier subtype/action level we're
not even close to running out of bits, so this should be fine.
Also had to correct a wrong notifier check (was using `&` rather than
`==`).

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/editors/object/object_add.c b/source/blender/editors/object/object_add.c
index 139900d0a4d..a59d8136f47 100644
--- a/source/blender/editors/object/object_add.c
+++ b/source/blender/editors/object/object_add.c
@@ -1450,6 +1450,7 @@ static int collection_instance_add_exec(bContext *C, wmOperator *op)
     DEG_relations_tag_update(bmain);
     DEG_id_tag_update(&scene->id, ID_RECALC_SELECT);
     WM_event_add_notifier(C, NC_SCENE | ND_OB_ACTIVE, scene);
+    WM_event_add_notifier(C, NC_SCENE | ND_LAYER_CONTENT, scene);
 
     return OPERATOR_FINISHED;
   }
@@ -2783,6 +2784,7 @@ static int object_convert_exec(bContext *C, wmOperator *op)
   DEG_id_tag_update(&scene->id, ID_RECALC_SELECT);
   WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, scene);
   WM_event_add_notifier(C, NC_SCENE | ND_OB_SELECT, scene);
+  WM_event_add_notifier(C, NC_SCENE | ND_LAYER_CONTENT, scene);
 
   return OPERATOR_FINISHED;
 }
@@ -3003,6 +3005,7 @@ static int duplicate_exec(bContext *C, wmOperator *op)
   DEG_id_tag_update(&scene->id, ID_RECALC_COPY_ON_WRITE | ID_RECALC_SELECT);
 
   WM_event_add_notifier(C, NC_SCENE | ND_OB_SELECT, scene);
+  WM_event_add_notifier(C, NC_SCENE | ND_LAYER_CONTENT, scene);
 
   return OPERATOR_FINISHED;
 }
@@ -3094,6 +3097,7 @@ static int object_add_named_exec(bContext *C, wmOperator *op)
   DEG_id_tag_update(&scene->id, ID_RECALC_SELECT);
   WM_event_add_notifier(C, NC_SCENE | ND_OB_SELECT, scene);
   WM_event_add_notifier(C, NC_SCENE | ND_OB_ACTIVE, scene);
+  WM_event_add_notifier(C, NC_SCENE | ND_LAYER_CONTENT, scene);
   ED_outliner_select_sync_from_object_tag(C);
 
   return OPERATOR_FINISHED;