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Re: display-buffer-overriding-action
From: |
Chong Yidong |
Subject: |
Re: display-buffer-overriding-action |
Date: |
Tue, 13 Sep 2011 15:01:08 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
Stefan Monnier <address@hidden> writes:
>> former is not a problem: C-x 5 b passes an ACTION argument to
>> pop-to-buffer, which takes precedence over d-b-alist.
>
> No, the ACTION argument takes precedence over d-b-default-action but not
> over d-b-alist.
I meant d-b-default-action there.
>> The display-buffer action functions aren't told what the original
>> arguments to display-buffer were, so it can't know whether
>> display-buffer was called for `C-x 5 b' or `C-x 4 b', or another
>> command entirely.
>
> C-x 5 b would not do
>
> (display-buffer BUFFER <some-clever-action)
> but
> (let ((d-b-overriding-action <some-clever-action>))
> (display-buffer BUFFER))
In your scheme, under what circumstances would *any* Lisp caller of
display-buffer use the ACTION argument?
As far as I can see, every Lisp caller falls into one of two cases:
- "Generic" calls to display-buffer or pop-to-buffer, which don't intend
to second guess Emacs defaults and/or user settings.
- Commands like `C-x 5 b' or `info-other-window', which fall under the
"explicit command" criterion and should override the defaults.
Your rationale for not using the ACTION argument is to allow a third
case, wherein the Lisp caller wants to specify some behavior that can be
overridden by the user. I contend that Lisp callers should almost never
do that: as far as possible, they should use a `bare' display-buffer or
pop-to-buffer call. In that case, it's conceptually cleaner to handle
the second case by letting those callers use the ACTION argument.
Do you have any specific counterexamples in mind?
- Re: display-buffer-alist simplifications, martin rudalics, 2011/09/01
- Re: display-buffer-alist simplifications, Stefan Monnier, 2011/09/01
- Re: display-buffer-alist simplifications, Chong Yidong, 2011/09/02
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- display-buffer-overriding-action, Chong Yidong, 2011/09/11
- Re: display-buffer-overriding-action, Juanma Barranquero, 2011/09/11
- Re: display-buffer-overriding-action, Stefan Monnier, 2011/09/12
- Re: display-buffer-overriding-action, Chong Yidong, 2011/09/12
- Re: display-buffer-overriding-action, Stefan Monnier, 2011/09/13
- Re: display-buffer-overriding-action,
Chong Yidong <=
- Re: display-buffer-overriding-action, Chong Yidong, 2011/09/13
- Re: display-buffer-overriding-action, Stefan Monnier, 2011/09/13
- Re: display-buffer-overriding-action, Chong Yidong, 2011/09/13
- Re: display-buffer-overriding-action, Stefan Monnier, 2011/09/13
- Re: display-buffer-overriding-action, Chong Yidong, 2011/09/13
- Re: display-buffer-overriding-action, Stefan Monnier, 2011/09/14
- Re: display-buffer-overriding-action, Chong Yidong, 2011/09/14
- Re: display-buffer-overriding-action, Stefan Monnier, 2011/09/14