bug#44334: 28.0.50; [eldoc] Impossible to avoid creating the *eldoc for xxx* buffer

bug#44334: 28.0.50; [eldoc] Impossible to avoid creating the *eldoc for xxx* buffer

[Xu Chunyang]

With eldoc-mode, a buffer like *eldoc for setq* is created and updated
all the time, is it possible to stop it? since I don't need the
buffer at all. If the buffer must be created, maybe make it uninteresting by
prefixing the buffer name with a space.

I've tried the following which does not work.

(remove-hook 'eldoc-display-functions #'eldoc-display-in-buffer)

In GNU Emacs 28.0.50 (build 2, x86_64-apple-darwin19.6.0, NS
appkit-1894.60 Version 10.15.7 (Build 19H2))
 of 2020-10-30 built on mac.lan
Repository revision: 3e63213a1fef16ffe38a5024a83d8782e98aabe1
Repository branch: master
Windowing system distributor 'Apple', version 10.3.1894
System Description:  Mac OS X 10.15.7

bug#44334: 28.0.50; [eldoc] Impossible to avoid creating the *eldoc for xxx* buffer

[Basil L. Contovounesios]

Xu Chunyang <xuchunyang56@gmail.com> writes:

> With eldoc-mode, a buffer like *eldoc for setq* is created and updated
> all the time, is it possible to stop it? since I don't need the
> buffer at all. If the buffer must be created, maybe make it uninteresting by
> prefixing the buffer name with a space.

I would also like to avoid the presence of this buffer if possible,
as was the case in emacs-27.  CCing João :).

Thanks,

-- 
Basil

bug#44334: 28.0.50; [eldoc] Impossible to avoid creating the *eldoc for xxx* buffer

[João Távora]

[-- Attachment #1: Type: text/plain, Size: 1007 bytes --]

Hi,

The buffer is an implementation detail for the member of
eldoc-display-functions that writes to the echo area,
so it's hard to do away with.  However, it should be reasonably
easy to "hide it", as Xu suggests, by prefixing its name with a
space. The the eldoc-display-in-eldoc-buffer display function
just renames it to not have that space, promoting it
to visible.

Thanks for CC'ing me,
João

On Fri, Oct 30, 2020 at 6:09 PM Basil L. Contovounesios <contovob@tcd.ie>
wrote:

> Xu Chunyang <xuchunyang56@gmail.com> writes:
>
> > With eldoc-mode, a buffer like *eldoc for setq* is created and updated
> > all the time, is it possible to stop it? since I don't need the
> > buffer at all. If the buffer must be created, maybe make it
> uninteresting by
> > prefixing the buffer name with a space.
>
> I would also like to avoid the presence of this buffer if possible,
> as was the case in emacs-27.  CCing João :).
>
> Thanks,
>
> --
> Basil
>


-- 
João Távora

[-- Attachment #2: Type: text/html, Size: 1615 bytes --]

bug#44334: 28.0.50; [eldoc] Impossible to avoid creating the *eldoc for xxx* buffer

[Basil L. Contovounesios]

João Távora <joaotavora@gmail.com> writes:

> The buffer is an implementation detail for the member of 
> eldoc-display-functions that writes to the echo area,
> so it's hard to do away with.  However, it should be reasonably 
> easy to "hide it", as Xu suggests, by prefixing its name with a
> space. The the eldoc-display-in-eldoc-buffer display function
> just renames it to not have that space, promoting it 
> to visible.

So the space-prefixed buffer name can (should?) be the default?

Thanks,

-- 
Basil

bug#44334: 28.0.50; [eldoc] Impossible to avoid creating the *eldoc for xxx* buffer

[João Távora]

"Basil L. Contovounesios" <contovob@tcd.ie> writes:

> João Távora <joaotavora@gmail.com> writes:
>
>> The buffer is an implementation detail for the member of 
>> eldoc-display-functions that writes to the echo area,
>> so it's hard to do away with.  However, it should be reasonably 
>> easy to "hide it", as Xu suggests, by prefixing its name with a
>> space. The the eldoc-display-in-eldoc-buffer display function
>> just renames it to not have that space, promoting it 
>> to visible.
>
> So the space-prefixed buffer name can (should?) be the default?

Yes. Or rather: by default, if you just use ElDoc like you always did in
Emacs <28, that buffer shouldn't be bothering you.  I'll see what the
best implementation for doing that is, but I do suspect it's hiding it
with a space prefix in the buffer name.

João

bug#44334: 28.0.50; [eldoc] Impossible to avoid creating the *eldoc for xxx* buffer

[João Távora]

João Távora <joaotavora@gmail.com> writes:

> "Basil L. Contovounesios" <contovob@tcd.ie> writes:
>
>> João Távora <joaotavora@gmail.com> writes:
>>
>>> The buffer is an implementation detail for the member of 
>>> eldoc-display-functions that writes to the echo area,
>>> so it's hard to do away with.  However, it should be reasonably 
>>> easy to "hide it", as Xu suggests, by prefixing its name with a
>>> space. The the eldoc-display-in-eldoc-buffer display function
>>> just renames it to not have that space, promoting it 
>>> to visible.
>>
>> So the space-prefixed buffer name can (should?) be the default?
>
> Yes. Or rather: by default, if you just use ElDoc like you always did in
> Emacs <28, that buffer shouldn't be bothering you.  I'll see what the
> best implementation for doing that is, but I do suspect it's hiding it
> with a space prefix in the buffer name.

I just pushed a commit fixing this.  Please try it out. The idea is that
if you never M-x eldoc or M-x eldoc-doc-buffer, you are never bothered
by that buffer.  If you do call these commands, the buffer becomes
"interesting" and shows in the normal buffer list, until you kill it,
after which it re-created in space-prefixed "uninterested" form again.

I'm closing this bug, but we could reopen if the problem isn't fixed.

João

bug#44334: 28.0.50; [eldoc] Impossible to avoid creating the *eldoc for xxx* buffer

[Basil L. Contovounesios]

João Távora <joaotavora@gmail.com> writes:

> I just pushed a commit fixing this.  Please try it out. The idea is that
> if you never M-x eldoc or M-x eldoc-doc-buffer, you are never bothered
> by that buffer.  If you do call these commands, the buffer becomes
> "interesting" and shows in the normal buffer list, until you kill it,
> after which it re-created in space-prefixed "uninterested" form again.

Looks good, thanks for the quick fix.

-- 
Basil