Re: LaTeX commands and packages names autocomplete.

[Hongyi Zhao]

On Fri, May 5, 2023 at 7:58 AM Hongyi Zhao <hongyi.zhao@gmail.com> wrote:
>
> On Fri, May 5, 2023 at 2:18 AM Arash Esbati <arash@gnu.org> wrote:
> >
> > Hongyi Zhao <hongyi.zhao@gmail.com> writes:
> >
> > > I should have also uncommented the above line. But even so, I have the
> > > following problems:
> > >
> > > 1. I must at least type 3 letters to trigger the completion.
> >
> > ,----[ C-h v corfu-auto-prefix RET ]
> > | corfu-auto-prefix is a variable defined in ‘corfu.el’.
> > |
> > | Its value is 3
> > |
> > | Minimum length of prefix for auto completion.
> > | The completion backend can override this with
> > | :company-prefix-length.  It is *not recommended* to use a small
> > | prefix length (below 2), since this will create high load for
> > | Emacs.  See also ‘corfu-auto-delay’.
> > |
> > |   You can customize this variable.
> > |
> > `----
> >
> > > 2. Furthermore, my completion candidates list entries are less than
> > > yours, as shown in the attached screenshot.
> >
> > If you take a closer look, you'll see that the screenshot I sent had
> > also a candidate "because" since I hit TAB after only 2 characters, you
> > have 3 characters "bec" in the buffer where the completion kicks in,
> > hence one candidate is missing.
>
> You're right. Set `(corfu-auto-prefix 2)` does the trick, as shown in
> the attached screenshot.
>
> > In your other mail, you wrote:
> >
> > > Another problem I noticed:
> > >
> > > 3. The speed of triggering the candidate list for the first time is
> > > very slow, while company-mode does not seem to have this problem.
> >
> > I don't use use-package, but you'll know that it loads packages lazily,
> > so if you're using corfu in your .tex file for the first in a fresh
> > Emacs instance, it has to be loaded; maybe that's the reason.  I observe
> > the same thing if I deactivate corfu in a .tex buffer and activate
> > company; it takes a sec before it's ready to go.
>
> Now, I add the `:demand t` to the corfu's use-package configuration,
> but the problem still remains:
>
> (use-package corfu
>   :demand t
>   ;; Optional customizations
>   :custom
>   ;; (corfu-cycle t)                ;; Enable cycling for 
> `corfu-next/previous'
>   (corfu-auto t)                 ;; Enable auto completion
>   (corfu-auto-prefix 2)
>   ;; (corfu-separator ?\s)          ;; Orderless field separator
>   ;; (corfu-quit-at-boundary nil)   ;; Never quit at completion boundary
>   ;; (corfu-quit-no-match nil)      ;; Never quit, even if there is no match
>   ;; (corfu-preview-current nil)    ;; Disable current candidate preview
>   ;; (corfu-preselect 'prompt)      ;; Preselect the prompt
>   ;; (corfu-on-exact-match nil)     ;; Configure handling of exact matches
>   ;; (corfu-scroll-margin 5)        ;; Use scroll margin
>
>   ;; Enable Corfu only for certain modes.
>   ;; :hook ((prog-mode . corfu-mode)
>   ;;        (shell-mode . corfu-mode)
>   ;;        (eshell-mode . corfu-mode))
>
>   ;; Recommended: Enable Corfu globally.
>   ;; This is recommended since Dabbrev can be used globally (M-/).
>   ;; See also `corfu-exclude-modes'.
>   :init
>   (global-corfu-mode))
>
> ;; A few more useful configurations...
> (use-package emacs
>   :init
>   ;; TAB cycle if there are only few candidates
>   ;; (setq completion-cycle-threshold 3)
>
>   ;; Emacs 28: Hide commands in M-x which do not apply to the current mode.
>   ;; Corfu commands are hidden, since they are not supposed to be used via 
> M-x.
>   ;; (setq read-extended-command-predicate
>   ;;       #'command-completion-default-include-p)
>
>   ;; Enable indentation+completion using the TAB key.
>   ;; `completion-at-point' is often bound to M-TAB.
>   (setq tab-always-indent 'complete))

Till now, I still encounter the following problems:

1. After I've enabled the following option, continuous pressing Tab
key doesn't cycle through the candidates.

 (setq completion-cycle-threshold 3)

2. Package names still cannot be automatically completed, as shown in
the attached screenshot.

> > Best, Arash
>
> Regards, Zhao

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