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Re: global-company-mode and company-mode

From: wilnerthomas
Subject: Re: global-company-mode and company-mode
Date: Tue, 2 Aug 2022 13:15:30 +0200 (CEST)

Aug 2, 2022, 11:09 by

> On 02/08/2022 12:26, wilnerthomas--- via Users list for the GNU Emacs text 
> editor <> wrote:
>> I do not understand how to enable `company-mode'.  Because there is 
>> (company-mode 1)
>> and `(add-hook 'after-init-hook 'global-company-mode)'.
> What is the difference between the two.  
> (company-mode 1) only turns the mode on in the current buffer, 
> (global-company-mode 1) turns it on in every existing buffer, and will turn 
> it on in every future buffer (except for buffers not visiting a file and with 
> the fundamental-mode).
>> Why 'after-init-hook is used, cannot there just be
>> (global-company-mode 1)?
> I am not sure, but I suspect it is to make sure that all packages which might 
> change the way company-mode works are already loaded at the time of 
> activation.
> But then again, the main effect of (global-company-mode 1) at that point is 
> to tell future buffers to activate company-mode, which would be after 
> initialization anyway. Even the *scratch* buffer (usually the only editable 
> buffer created at initialization) should be in fundamental-mode at the time 
> of running of the hook, so it isn't affected by global-company-mode.
> So the two calls might not be strictly equivalent, but I believe that they 
> would be indistinguishable in most use-cases.
>> When using `add-hook', how would I disable `global-company-mode' later?
> The hook is run only once, when starting emacs, so it doesn't matter in a 
> running emacs.
> Just call (global-company-mode -1) to disable it later. Note that it should 
> also disable company-mode in all buffers where the global setting was applied 
> (and not overridden by a local (company-mode 1)). (I think, at least. I 
> always end up confused by the semantics of disabling global vs local modes.)
Right.  Is there the command (global-company-mode -1) available?  What if I 
want to enable global-company-mode, would I use the hook?

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