From: martin rudalics <rudalics@gmx.at>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Documenting buffer display
Date: Wed, 24 Oct 2018 19:40:02 +0200 [thread overview]
Message-ID: <5BD0AE72.9060503@gmx.at> (raw)
In-Reply-To: <83h8hbs8ms.fsf@gnu.org>
> Just to clarify what I meant: I did NOT mean display-buffer-alist. I
> meant something like this:
>
> find-dired is an interactive compiled function...
> [...]
> By default, display the buffer in the selected window;
> NO-SELECT non-nil (interactively, prefix argument) means display the
> buffer in a window other than the selected one instead.
NO-SELECT non-nil implies that the window to show the buffer will
not be selected which is probably not what the user wants here.
> or
>
> By default, display the buffer in the selected window, but if
> the value of `find-dired-no-select' is non-nil, display the
> buffer in a window other than the selected one instead.
>
> This is our usual method of letting users tweak some minor aspects of
> how a command works, and I see no reason why users would instead have
> to construct action lists to do the same for commands that happen to
> use display-buffer internally.
Applications have the choice: Prescribe where and how buffers should
be displayed or delegate that task to 'display-buffer'. 'ediff' uses
the former approach through a number of options like, for example,
'ediff-split-window-function'. 'edebug' uses 'edebug-pop-to-buffer'.
Users of the latter call 'pop-to-buffer' or 'display-buffer' directly.
Both approaches are valid.
'switch-to-buffer' belongs to the first group unless the selected
window is dedicated to some other buffer in which case
'switch-to-buffer' leaves the decision to 'pop-to-buffer' and we
already have a hybrid approach. This is problematic and I always
advocate against the use of 'switch-to-buffer' in code: The
application should decide whether it wants one or the other.
Still, if we want users to tweak only "some minor aspects of how a
command works", the approach you sketch above is completely valid and
I think that Juri's recent proposal to allow the directional choice of
windows goes in the same direction and is even more universal. We can
use 'display-buffer-overriding-action' for the prefix argument case
and I am all for it. In either case, such a solution is not too
distinct from Stephen Leake's 'other-frame-window' approach so we
maybe should study that as well.
But once an application directly or indirectly calls 'display-buffer'
the latter's customizations may kick in and invalidate all assumptions
about the window used. So if your NO-SELECT or Juri's directional
effort fail, 'display-buffer' will inevitably rule the game.
martin
next prev parent reply other threads:[~2018-10-24 17:40 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-20 12:20 Documenting buffer display martin rudalics
2018-10-20 13:21 ` Eli Zaretskii
2018-10-20 18:02 ` martin rudalics
2018-10-21 12:56 ` Eli Zaretskii
2018-10-22 9:06 ` martin rudalics
2018-10-22 13:55 ` Eli Zaretskii
2018-10-22 19:14 ` martin rudalics
2018-10-22 19:27 ` Eli Zaretskii
2018-10-23 8:58 ` martin rudalics
2018-10-23 11:26 ` Pierre-Yves Luyten
2018-10-23 13:45 ` martin rudalics
2018-10-23 17:40 ` Stefan Monnier
2018-10-23 14:04 ` Drew Adams
2018-10-23 18:18 ` martin rudalics
2018-10-23 15:18 ` Eli Zaretskii
2018-10-23 18:23 ` martin rudalics
2018-10-23 19:07 ` Eli Zaretskii
2018-10-24 9:44 ` martin rudalics
2018-10-24 14:48 ` Eli Zaretskii
2018-10-24 17:40 ` martin rudalics [this message]
2018-10-24 18:25 ` Eli Zaretskii
2018-10-25 20:42 ` Juri Linkov
2018-10-23 15:52 ` Alan Mackenzie
2018-10-23 18:25 ` martin rudalics
2018-11-08 19:25 ` martin rudalics
2018-10-22 1:39 ` Michael Welsh Duggan
2018-10-22 5:54 ` Eli Zaretskii
2018-10-20 15:22 ` Drew Adams
2018-10-20 18:02 ` martin rudalics
2018-10-20 18:24 ` Drew Adams
2018-10-21 8:22 ` martin rudalics
2018-11-04 9:06 ` martin rudalics
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