| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, David Fetter <david(at)fetter(dot)org>, ilmari(at)ilmari(dot)org, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Invisible PROMPT2 |
| Date: | 2019-11-18 01:40:50 |
| Message-ID: | CA+hUKGJBmMLYHyBHSfuuB7Y7bewo9OLp54xz6XHZrLJYBy+gOA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Nov 18, 2019 at 1:49 PM Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
> On 2019-Nov-18, Thomas Munro wrote:
> > Nice idea. Here's one like that, that just does the counting at the
> > end and looks out for readline control codes. It's pretty naive about
> > what "width" means though: you'll get two spaces for UTF-8 encoded é,
> > and I suppose a complete implementation would know about the half
> > width/full width thing for Chinese and Japanese etc.
>
> Hmm ... is this related to what Juan José posted at
> https://postgr.es/m/CAC+AXB28ADgwdNRA=aAoWDYPqO1DZR+5NTO8iXGSsFrXyVpqYQ@mail.gmail.com
> ? That's backend code of course, though.
Yeah. Maybe pg_wcswidth() would be OK though, and it's available in
psql, though I guess you'd have to make a copy with the escaped bits
stripped out.
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