From: Matthew Keeter <matt.j.keeter@gmail.com>
To: Mike Gran <spk121@yahoo.com>
Cc: "guile-user@gnu.org" <guile-user@gnu.org>
Subject: Re: Readline behavior with colored custom prompt
Date: Thu, 25 Feb 2016 13:53:16 -0500 [thread overview]
Message-ID: <DD37CD65-0288-40DF-8807-2D9DD2B430DE@gmail.com> (raw)
In-Reply-To: <1474022160.2484505.1456423503453.JavaMail.yahoo@mail.yahoo.com>
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I think the fundamental issue is incorrect prompt length calculation, since it’s not just bounce-parens:
even with that turned off, scrolling through history ends up printing weird mismatched lines.
Here’s a similar issue discussed in nodejs:
https://github.com/nodejs/node-v0.x-archive/issues/3860
Any suggestions where to look for prompt length calculations?
I flipped through guile-readline/readline.c but didn’t see any obvious places to apply a fix.
Thanks,
Matt
On Feb 25, 2016, at 1:05 PM, Mike Gran <spk121@yahoo.com> wrote:
>
>
>
> On Thursday, February 25, 2016 9:21 AM, Matthew Keeter <matt.j.keeter@gmail.com> wrote:
>
>>
>> Run this and you’ll get a Guile shell. Into that shell, type
>>
>> '(1 2 3 4 5 6 7 8 9 10)
>>
>> The final parenthesis will highlight a character midway through the string
>> (instead of the first parenthesis).
>>
>> The same issues happen if you try to scroll through history: lines end up
>> overlapping in strange ways.
>>
>> Removing the ANSI codes from custom-prompt resolves the issue, but I’d really
>> like to have a colored prompt and correct readline behavior.
>>
>> Does anyone have any ideas?
>
> The conflict is likely between your codes and the bounce-parens functionality
> of the readline prompt.
>
> (readline-set! bounce-parens 0) should disable that functionality and make the
> colored prompt work.
>
> To get your escape sequences and bounce-parens working would probably require
> more thinking...
>
> -Mike
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next prev parent reply other threads:[~2016-02-25 18:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-25 17:20 Readline behavior with colored custom prompt Matthew Keeter
2016-02-25 18:05 ` Mike Gran
2016-02-25 18:53 ` Matthew Keeter [this message]
2016-02-25 22:09 ` Matthew Keeter
2016-02-26 5:09 ` Nala Ginrut
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