From: Felipe Contreras <felipe.contreras@gmail.com>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: zsh-workers@zsh.org
Subject: Re: [PATCH v2] prompt: support generic non-visible regions
Date: Sun, 14 Aug 2022 17:46:54 -0500 [thread overview]
Message-ID: <CAMP44s36=YoiT7Lt-_j6h-fc47z_RS2CexCR++PCZ7p1CXxfEA@mail.gmail.com> (raw)
In-Reply-To: <CAH+w=7b2pn6=eXHxRRB8GR-yi6iH+fL8t0SO7Kka415O4g5wxQ@mail.gmail.com>
On Sun, Aug 14, 2022 at 2:57 PM Bart Schaefer <schaefer@brasslantern.com> wrote:
>
> On Thu, Aug 11, 2022 at 4:09 PM Felipe Contreras
> <felipe.contreras@gmail.com> wrote:
> >
> > readline uses \001 (start of header) and \002 (start of text) as markers
> > to delimit a non-visible character zone, which are necessary to
> > calculate the width of a prompt.
>
> How does one embed a literal ctrl-A or ctrl-B in the prompt?
What would that achieve?
> I haven't found any readline documentation that explains the use of
> "start of header" or "start of text".
It's in the code:
https://git.savannah.gnu.org/cgit/readline.git/tree/display.c#n340
> I'm also leaning to the opinion that \001 and \002 should only be
> recognized when PROMPT_PERCENT is unset.
That would defeat the primary purpose of the patch, which is to be
able to write prompt helper functions which work in multiple shells.
--
Felipe Contreras
next prev parent reply other threads:[~2022-08-14 22:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-11 23:09 Felipe Contreras
2022-08-14 19:57 ` Bart Schaefer
2022-08-14 22:46 ` Felipe Contreras [this message]
2022-08-15 1:00 ` Bart Schaefer
2022-08-15 21:37 ` Felipe Contreras
2022-08-17 22:31 ` Bart Schaefer
2022-08-17 22:48 ` Bart Schaefer
2022-08-22 0:17 ` Felipe Contreras
2022-08-22 0:15 ` Felipe Contreras
2022-08-22 0:11 ` [PATCH v3] " Felipe Contreras
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