Implement support for Append objects in Blender 2.8

Note for users
==============

The active_layer option used for the filebrowser operators is now called
active_collection.

If there is no collections in the scenelayer or if this option is not selected
we automatically create a new collection for the new objects.

This is the same behaviour of trying to add a new object when there is
no collection.

Note for developers
===================

For those cases I moved the object user count handling from readfile to
the scene collection system. It's working fine for those, but we still
need to re-visit this for Add objects, and Duplicate - In those cases
the usercount is 2 when it should be 1.

Reviewers: mont29, sergey

Differential Revision: https://developer.blender.org/D2686

1 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/blenloader/BLO_readfile.h b/source/blender/blenloader/BLO_readfile.h
index e6fc4703248..0213a4ee997 100644
--- a/source/blender/blenloader/BLO_readfile.h
+++ b/source/blender/blenloader/BLO_readfile.h
@@ -43,6 +43,7 @@ struct Main;
 struct MemFile;
 struct ReportList;
 struct Scene;
+struct SceneLayer;
 struct UserDef;
 struct View3D;
 struct bContext;
@@ -114,9 +115,9 @@ struct ID *BLO_library_link_named_part(struct Main *mainl, BlendHandle **bh, con
 struct ID *BLO_library_link_named_part_ex(
         struct Main *mainl, BlendHandle **bh,
         const short idcode, const char *name, const short flag,
-        struct Scene *scene, struct View3D *v3d,
+        struct Scene *scene, struct SceneLayer *sl,
         const bool use_placeholders, const bool force_indirect);
-void BLO_library_link_end(struct Main *mainl, BlendHandle **bh, short flag, struct Scene *scene, struct View3D *v3d);
+void BLO_library_link_end(struct Main *mainl, BlendHandle **bh, short flag, struct Scene *scene, struct SceneLayer *sl);
 
 void BLO_library_link_copypaste(struct Main *mainl, BlendHandle *bh);