bug#27427: 26.0.50; Native line numbers lead to display error in company-mode popup

[Eli Zaretskii]

> Date: Sat, 01 Jul 2017 12:31:49 +0200
> From: martin rudalics <rudalics@gmx.at>
> CC: dgutov@yandex.ru, alexanderm@web.de, 27427@debbugs.gnu.org
> 
>  > My idea was that these windows would be "special", in that they could
>  > only display some special buffer or maybe only a string.
> 
> Then we are back at my earlier ‘tty-popup-frames’ proposal with
> "windows" substituting "frames".  Please lets call these objects
> "popups" for now.

OK.

>  > About the
>  > only function we'd need is to set the coordinates where such a window
>  > will be displayed.  Everything else, including the dimensions, will be
>  > determined by the text to be displayed there.
> 
> We'd have to decide when to call the function that sets the coordinates.

I hoped the application would do that, via some new API.

> For that purpose each popup would probably have to store the window it
> originated from to handle scrolling of that window and any changes to
> its buffer.

That could be one way, but maybe we could use something more direct.