Re: We should decouple focus and frame switching

[dancol@dancol.org]

>>>>>> "DC" == Daniel Colascione <dancol@dancol.org> writes:
>
> DC> How about this? We'll add a frame-focused-p function that returns nil,
> t,
> DC> or 'unknown, and wire up focus-in-hook and focus-out-hook to run only
> when
> DC> we actually observe a window system focus change, letting the frame
> switch
> DC> stuff run completely independently. This way, we'll be able to write
> lisp
> DC> (as I've been trying to do) that reflects the real window system
> focus.
>
> DC> Sound good?
>
> Why might we not want this?

First of all, I'm worried about backward compatibility with existing
packages that rely on the current strange behavior of focus-in and
focus-out. I briefly scanned the tree, ELPA, and EmacsWiki, and I didn't
see anything that would obviously break, but that's no guarantee. The
alternative I was considering is to keep the existing focus events as they
are and add a new set of window-system-focus query functions and hooks
alongside it.

Second, Chesterton's fence: maybe there's a good reason the focus events
are structured the way they are? I was hoping somebody knew why we did it
this way in the first place.