Link/Append: Refactor flags.

Flags controlling link/append code are split between two enums, one in
`DNA_space_types.h` and one in `BLO_readfile.h`.

This commit:
 - Moves flags exclusively used in WM and BLO code to `eBLOLibLinkFlags`
   in `BLO_readfile.h`. Flags in `eFileSel_Params_Flag` from
   `DNA_space_types.h` are now only the ones effectively used by the
   file browser editor code too.
 - Fixes some internal utils in `readfile.c` still taking `short` flag
   parameter instead of proper `int` one.

NOTE: there are a few other flags that could probably be moved to
`eBLOLibLinkFlags` (at the very least `FILE_LINK`, probably also
`FILE_AUTOSELECT` and `FILE_ACTIVE_COLLECTION`), since those are not
effectively used by the file browser, and control linking/appending
behavior, not filebrowser behavior.

However for now think it's safer to not touch that.

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/blenloader/BLO_readfile.h b/source/blender/blenloader/BLO_readfile.h
index 4b7f29dd7dc..1f0203b45e9 100644
--- a/source/blender/blenloader/BLO_readfile.h
+++ b/source/blender/blenloader/BLO_readfile.h
@@ -209,6 +209,14 @@ typedef enum eBLOLibLinkFlags {
    * don't need to remember to set this flag.
    */
   BLO_LIBLINK_NEEDS_ID_TAG_DOIT = 1 << 18,
+  /** Set fake user on appended IDs. */
+  BLO_LIBLINK_APPEND_SET_FAKEUSER = 1 << 19,
+  /** Append (make local) also indirect dependencies of appendeds IDs. */
+  BLO_LIBLINK_APPEND_RECURSIVE = 1 << 20,
+  /** Instantiate object data IDs (i.e. create objects for them if needed). */
+  BLO_LIBLINK_OBDATA_INSTANCE = 1 << 21,
+  /** Instantiate collections as empties, instead of linking them into current view layer. */
+  BLO_LIBLINK_COLLECTION_INSTANCE = 1 << 22,
 } eBLOLibLinkFlags;
 
 /**