Commit: c08dac000ff3ca3597c82740c724f63f024ab542
Author: Dalai Felinto
Date:   Fri Dec 22 11:11:04 2017 -0200
Branches: blender2.8
https://developer.blender.org/rBc08dac000ff3ca3597c82740c724f63f024ab542

Collection: Name collection based on parent's name

So they are:

House
 -> House 1
 -> House 2
 -> ...

The exception is when the parent collection is the master collection. In this 
case we get:

Master Collection
 -> Collection 1
 -> Collection 2
 -> ...

This is part of "T53495: View layer and collection editing - Design Task"

===================================================================

M       source/blender/blenkernel/intern/collection.c
M       source/blender/blenkernel/intern/group.c
M       source/blender/blenloader/intern/versioning_280.c

===================================================================

diff --git a/source/blender/blenkernel/intern/collection.c 
b/source/blender/blenkernel/intern/collection.c
index 8d69563f5ff..f8934184928 100644
--- a/source/blender/blenkernel/intern/collection.c
+++ b/source/blender/blenkernel/intern/collection.c
@@ -69,24 +69,35 @@ static SceneCollection *collection_master_from_id(const ID 
*owner_id)
  * Add a collection to a collection ListBase and syncronize all render layers
  * The ListBase is NULL when the collection is to be added to the master 
collection
  */
-SceneCollection *BKE_collection_add(ID *owner_id, SceneCollection *sc_parent, 
const int type, const char *name)
+SceneCollection *BKE_collection_add(ID *owner_id, SceneCollection *sc_parent, 
const int type, const char *name_custom)
 {
        SceneCollection *sc_master = collection_master_from_id(owner_id);
        SceneCollection *sc = MEM_callocN(sizeof(SceneCollection), "New 
Collection");
        sc->type = type;
-
-       if (!name) {
-               name = DATA_("New Collection");
-       }
+       const char *name = name_custom;
 
        if (!sc_parent) {
                sc_parent = sc_master;
        }
 
+       if (!name) {
+               if (sc_parent == sc_master) {
+                       name = BLI_sprintfN("Collection %d", 
BLI_listbase_count(&sc_master->scene_collections) + 1);
+               }
+               else {
+                       name = BLI_sprintfN("%s %d", sc_parent->name, 
BLI_listbase_count(&sc_parent->scene_collections) + 1);
+               }
+       }
+
        BKE_collection_rename((Scene *)owner_id, sc, name);
        BLI_addtail(&sc_parent->scene_collections, sc);
 
        BKE_layer_sync_new_scene_collection(owner_id, sc_parent, sc);
+
+       if (name != name_custom) {
+               MEM_freeN((char *)name);
+       }
+
        return sc;
 }
 
diff --git a/source/blender/blenkernel/intern/group.c 
b/source/blender/blenkernel/intern/group.c
index 5b55433c1b9..8295fafba56 100644
--- a/source/blender/blenkernel/intern/group.c
+++ b/source/blender/blenkernel/intern/group.c
@@ -88,10 +88,7 @@ void BKE_group_init(Group *group)
        BKE_collection_unlink(group->view_layer, 
group->view_layer->layer_collections.first);
 
        /* Create and link a new default collection. */
-       SceneCollection *defaut_collection = BKE_collection_add(&group->id,
-                                                               NULL,
-                                                               
COLLECTION_TYPE_GROUP_INTERNAL,
-                                                               "Default 
Collection");
+       SceneCollection *defaut_collection = BKE_collection_add(&group->id, 
NULL, COLLECTION_TYPE_GROUP_INTERNAL, NULL);
        BKE_collection_link(group->view_layer, defaut_collection);
 }
 
diff --git a/source/blender/blenloader/intern/versioning_280.c 
b/source/blender/blenloader/intern/versioning_280.c
index ba5beb7993d..b864c75c90f 100644
--- a/source/blender/blenloader/intern/versioning_280.c
+++ b/source/blender/blenloader/intern/versioning_280.c
@@ -482,11 +482,6 @@ void do_versions_after_linking_280(Main *main)
                                        base->lay = base->object->lay;
                                }
 
-                               /* Fallback name if only one layer was found in 
the original file */
-                               if 
(BLI_listbase_is_single(&sc_master->scene_collections)) {
-                                       BKE_collection_rename(scene, 
sc_master->scene_collections.first, "Default Collection");
-                               }
-
                                /* remove bases once and for all */
                                for (Base *base = scene->base.first; base; base 
= base->next) {
                                        id_us_min(&base->object->id);

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