RE: one-window-p with no args no good for standalone minibuffer frame

[Drew Adams]

Resending.  Anyone have an explanation for this?  Thx.

> From: Drew Adams Sent: Wednesday, November 21, 2007 1:09 PM 
> My reading of the doc string for `one-window-p says that
> (one-window-p) should be the same as (one-window-p nil 'foobar), when
> it is evaled in a standalone minibuffer frame and the minibuffer is
> active. But it is not. The latter gives the correct result, t; the
> former returns nil.
> 
> For instance, with a standalone minibuffer frame and active
> minibuffer, this code should return t, just as it does if
> (one-window-p nil 'foobar) is used in it:
> 
> (and (active-minibuffer-window)
>      (save-selected-window
>        (select-window (minibuffer-window))
>        (one-window-p)))
> 
> The problem, I think, is that `one-window-p' just passes its
> ALL-FRAMES arg to `next-window', and `next-window' does not treat its
> ALL-FRAMES arg the same as (what the doc string states for)
> `one-window-p'.
> 
> The doc string of `one-window-p' says this for arg ALL-FRAMES:
> "ALL-FRAMES nil or omitted means count only the selected frame, plus
> the minibuffer it uses (which may be on another frame)." To me, that
> means it should count only the standalone minibuffer frame.
> 
> The doc string of `next-window' says that nil ALL-FRAMES means to
> cycle among all frames that use the same minibuffer (whenever the
> minibuffer counts, which it does when it is active). That is incorrect
> behavior for `one-window-p', and it might even be incorrect behavior
> for `next-window': In a standalone minibuffer, I would not expect
> `next-window' with nil ALL-FRAMES to return a window on another frame.
> 
> BTW, I don't understand why the sexp (if nomini 'arg) is used in the
> definition of `one-window-p'.  Why is the special value `arg' (or nil)
> passed, instead of just the value of NOMINI?
> 
> 
> In GNU Emacs 22.1.1 (i386-mingw-nt5.1.2600)
>  of 2007-06-02 on RELEASE
> Windowing system distributor `Microsoft Corp.', version 5.1.2600
> configured using `configure --with-gcc (3.4) --cflags 
> -Ic:/gnuwin32/include'