Re: Inline completion preview

[Dmitry Gutov <dmitry@gutov.dev>]

On 30/10/2023 14:42, Alexander Adolf wrote:
>> Also company works on TTY Emacs out of the box, and I think Corfu
>> doesn't.  More stuff to add in.
> Corfu works with TTY Emacs of of the box, too.

Are you sure you don't have corfu-terminal installed?

It's in NonGNU ELPA because it uses the 'popon' package which doesn't 
have its copyright assigned to FSF, and thus couldn't be included with 
Emacs until that happens.

> Under a graphical environment, corfu uses a frame provided by the
> graphical environment (for instance the window manager) to display the
> candidates. That way the display of the "popover" is independent of the
> fonts used in the buffer. Consider as an example an Org buffer, where
> the headings are rendered in a bigger font. Company will render popvover
> text in that area using the bigger font.
> 
> Result with company:
> ----------------------------------------------------------------------
> 
>         The quick brown fox jum
>                                +-------------+
>                                | candidate 1 |
>         * BIG FONT HEADING      | CANDIDATE 2    |
>           BIG FONT HEADING      | CANDIDATE 2    |
>                                | candidate 3 |
>                                | candidate 4 |
>                                +-------------+
> ----------------------------------------------------------------------
> 
> Duh! Company certainly showing its age here.
> 
> 
> Result with corfu:
> ----------------------------------------------------------------------
> 
>         The quick brown fox jum
>                                +-------------+
>                                | candidate 1 |
>         * BIG FONT HEADING     | candidate 2 |
>           BIG FONT HEADING     | candidate 3 |
>                                | candidate 4 |
>                                +-------------+
> ----------------------------------------------------------------------

You can try out this branch: 
https://github.com/company-mode/company-mode/pull/1394

It should deal with big fonts, as well as multiple width characters, 
fine. The only thing that seems impossible to implement is compatibility 
with line numbering. Perhaps I'll someday switch to popon/popup.el's 
approach of one-overlay-per-line when I have more time.

If 'popon' were in GNU ELPA, however, Company could also use it. In 
fact, writing a frontend using it for your own purpose should already be 
easy enough.