From: Mikael Magnusson <mikachu@gmail.com>
To: Roman Perepelitsa <roman.perepelitsa@gmail.com>,
Bart Schaefer <schaefer@brasslantern.com>,
Millian Poquet <millian.poquet@irit.fr>,
zsh-workers@zsh.org
Subject: Re: Get cursor position (Was: [bug report] prompt can erase messages written on the terminal by background processes)
Date: Thu, 8 Dec 2022 11:19:17 +0100 [thread overview]
Message-ID: <CAHYJk3QDrc8ZD3rDWxZofk2zUbJgU-X-XVccsr68BZsXLo3giQ@mail.gmail.com> (raw)
In-Reply-To: <20221208100215.k2qcqdqgjlzwbdh7@chazelas.org>
On 12/8/22, Stephane Chazelas <stephane@chazelas.org> wrote:
> 2022-12-08 09:34:41 +0100, Roman Perepelitsa:
> [...]
>> > curpos() {
>> > set -o localoptions -o extendedglob
>> > local match answer
>> > IFS= read -rsdR -t0.2 answer$'?\e[6n' &&
>> > [[ $answer = (#b)$'\e['(<->)';'(<->) ]] &&
>> > eval "${1-x}=\$match[2] ${2-y}=\$match[1]"
>> > }
>>
>> Functions that accept output parameter names as arguments are tricky.
>> The following won't work:
>>
>> # Which line is the cursor on?
>> curpos _ answer
>> print -r -- "The cursor is on the line number $answer"
> [...]
>
> Yes, I thought of using 3 as the intermediary variable, but
> decided against it as we can't do anything about match,
> mbegin... anyway.
>
> typeset -g "${1-x}=$match[2]" "${2-y}=$match[1]"
>
> Doesn't work either. I guess there's no way to access variables
> by the same name in that parent scope or to unlocal a variable?
I have a patch for it, but I never sent it because I couldn't think of
a usecase. http://comm.it.cx/cgit/zsh-cvs/patch/?id=cf1ba693c9f3ed80ff085bfed74d854796349a0d
(I'm not 100% sure all the error checks are correct, and cover all
cases, especially wrt bart's private module).
--
Mikael Magnusson
next prev parent reply other threads:[~2022-12-08 10:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-07 19:02 [bug report] prompt can erase messages written on the terminal by background processes Millian Poquet
2022-12-07 22:55 ` Roman Perepelitsa
2022-12-08 3:46 ` Bart Schaefer
2022-12-08 8:21 ` Get cursor position (Was: [bug report] prompt can erase messages written on the terminal by background processes) Stephane Chazelas
2022-12-08 8:34 ` Roman Perepelitsa
2022-12-08 10:02 ` Stephane Chazelas
2022-12-08 10:10 ` Stephane Chazelas
2022-12-08 10:19 ` Mikael Magnusson [this message]
2022-12-09 2:19 ` Bart Schaefer
2022-12-09 12:46 ` Philippe Altherr
2022-12-10 4:30 ` Bart Schaefer
2022-12-10 14:55 ` Private variables not private enough? (Was: Get cursor position (Was: [bug report] prompt can erase messages written on the terminal by background processes)) Philippe Altherr
2022-12-10 17:36 ` Bart Schaefer
2022-12-10 20:38 ` Bart Schaefer
2022-12-11 18:00 ` Get cursor position (Was: [bug report] prompt can erase messages written on the terminal by background processes) Stephane Chazelas
2022-12-09 1:39 ` Bart Schaefer
2022-12-08 8:45 ` [bug report] prompt can erase messages written on the terminal by background processes Roman Perepelitsa
2022-12-08 15:03 ` Oliver Kiddle
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