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Re: Buffer corruption when the terminal is resized.


From: Paul Peet
Subject: Re: Buffer corruption when the terminal is resized.
Date: Sat, 10 Jun 2017 19:21:36 +0200

If I understand this correctly this prompt (see below) shouldn't
contain any invisible sequence, therefore it doesn't require the
wrapping with \[ and \].

PS1="address@hidden"

So bash should be able to correctly calculate the prompt size and
such, but by resizing the window it still results in a corrupted
buffer.

I've uploaded another gif which shows this:
https://media.giphy.com/media/xUA7biW8UtwYIU6ggg/giphy.gif


On Sat, Jun 10, 2017 at 6:58 PM, Eduardo Bustamante <address@hidden> wrote:
> On Sat, Jun 10, 2017 at 06:49:13PM +0200, Paul Peet wrote:
>> declare -- PS1="\\[\\e]0;address@hidden:
>> \\w\\a\\]\${debian_chroot:+(\$debian_chroot)}\\[\\033[01;address@hidden:\\[\\033[01;34m\\]\\w\\[\\033[00m\\]\\\$
>> "
> [...]
>> > Bash relies on \[ and \] to determine how much space is occupied by the
>> > prompt when it is to be redrawn, so in this case it thinks the prompt is 2
>> > columns wider than it actually is.
>
> George already said it. There are two types of characters inside the
> prompt string, visible and invisible. Color sequences are of the
> invisible kind (these have an effect on the terminal, but do not occupy
> any space on the line). You must wrap invisible character sequences with
> \[ and \], otherwise Readline's calculation to figure out the physical
> lenght of your prompt string will be off, and will cause the effect that
> you're experiencing.
>
> Try with:
>
>         #  vvvvv- this is an invisible sequence.
>     PS1='\[\e]0;address@hidden:\w\a\$...'
>         # ^      ^
>
> instead.
>
> --
> Eduardo Bustamante
> https://dualbus.me/



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