Re: display-until.el - Display a window or frame topmost in the frame stack until a condition or timeout occurs

[Eli Zaretskii <eliz@gnu.org>]

> From: Robert Weiner <rsw@gnu.org>
> Date: Mon, 18 Dec 2017 13:17:04 -0500
> Cc: martin rudalics <rudalics@gmx.at>, emacs-devel <emacs-devel@gnu.org>
> 
> ​If possible, shouldn't make-frame wait until the frame is
> created and mapped to the display if the creation command
> demands mapping?  I guess you could start editing properties
> on ​an as yet unmapped frame but in the general case, wouldn't
> a programmer want the frame and its constituent parts to
> exist prior to moving on?
> 
> Since frame creation is done by a separate thread now,
> are all following operations on the frame queued until the
> whole frame is built or will they be lost if invoked during
> this interim creation period.  For example, if I change an
> item on the toolbar prior to full toolbar creation, what
> happens?

AFAIK, you can operate on the frame, as long as you don't expect it to
be displayed right away.

> How can an Elisp programmer be sure the frame creation has
> finished without any reference to its creation thread?

The usual way is to insert

  (sit-for 0 t)

before the code that needs the frame visible.  You can see this, e.g.,
in fancy-splash-frame and in some other places.