Multi-line prompt and terminal window resize

Multi-line prompt and terminal window resize

[Tomáš Nechutný]

Hello,

I have multiline prompt:

PROMPT="%n:%~
$ "

I noticed that after resizing terminal window (konsole and urxvt), zsh adds 
extra first line of prompt. But only after startup or when you type something 
before resizing (eg. when you resize n-times and don't type anything it 
happens just once).

Re: Multi-line prompt and terminal window resize

[Mikael Magnusson]

2009/6/28 Tomáš Nechutný <nechtom@gmail.com>:
> Hello,
>
> I have multiline prompt:
>
> PROMPT="%n:%~
> $ "
>
> I noticed that after resizing terminal window (konsole and urxvt), zsh adds
> extra first line of prompt. But only after startup or when you type something
> before resizing (eg. when you resize n-times and don't type anything it
> happens just once).

If you have RPS1 set to something, I can explain what happens: The
problem is that urxvt reflows lines when you resize the terminal,
which can add a line, then zsh redraws it too, which keeps half of the
old line. I have no idea why it happens with a multiline prompt
though; it seems zsh doesn't output spaces to the end of the first
line. You get a quite fun effect if you setopt promptcr promptsp and
do echo -n foo, then resize (wider or narrower).

-- 
Mikael Magnusson