Is it possible to have the filename and cursor posn displayed continuously — WITHOUT using statusline?

Typing ^G gives

"filename" 119 lines --17%-- 21,0-1 Top

Setting statusline=%t %m%r%50l,%c%V %P gives e.g.:

filename [+]                            21, 0-1       Top
-- INSERT --

i.e. the statusline is in addition to the normal line used for :ex cmds, showmode and ruler.

Ideally, I’d like something like:

filename [+]       -- INSERT --                          21, 0-1       Top

as the line normally used by the ruler. I.e. not using a statusline (and not the window title either).