martin rudalics <rudalics@gmx.at> writes:
> (2) Allow to specify the desired (parent) mode via an ALIST ‘mode’
> entry.  As value we could allow a single mode or a list of modes.  Then
> a window showing a buffer in the same mode as the buffer we want to
> display should maybe given preference to a window showing a buffer in
> another mode, derived from the same parent mode.  If a same-mode-window
> exists on another and a derived-mode-window exists on the selected
> frame, one of these should be given preference consistently.

Well, it took a bit of time but here I am ! Could you please review the
following patch ?