Re: Framework extending window functions for Follow Mode (etc.).

[Artur Malabarba]

On 5 Nov 2015 7:29 pm, "Alan Mackenzie" <address@hidden> wrote:
>
> Hello, Emacs.

Hi Alan,

> Partly out of a need to nail down bug #17453, partly out of a need to
> make it easier for arbitrary libraries to work with Follow Mode, partly
> at the suggestion of Eli, I now propose the following.
>
> The six functions window-start, window-end, set-window-start, recenter,
> pos-visible-in-window-p, and move-to-window-line-function will acquire
> an extra optional parameter GROUP.  The notion is that "this call is
> interested in groups of windows, not just single ones".

I admit I am confused. I thought we had narrowed down three possible solutions to this issue (which you just listed over at the bug thread), all of which are simpler than this code.
Is this functionality here still necessary to fix that bug?