Cannot tell why POSTDISPLAY doesn't work

Cannot tell why POSTDISPLAY doesn't work

[Sebastian Gniazdowski]

Hello,
I can use zle -M to show messages from zle widget. It's wrapped normal
widget, wrapping done by syntax-highlighting, and from the wrapping
code zle -M is called.

But if I try to use POSTDISPLAY, it doesn't work, no message under
prompt is shown. Any idea why?

Tried:  POSTDISPLAY=$'\n'"Test"
-- 
Best regards,
Sebastian Gniazdowski

Re: Cannot tell why POSTDISPLAY doesn't work

[Sebastian Gniazdowski]

Some more data on this, POSTDISPLAY works, but only *sometimes*

https://asciinema.org/a/uDM5oznmrNWXfg78j7T3QqNVr

On 5 June 2018 at 16:50, Sebastian Gniazdowski <sgniazdowski@gmail.com> wrote:
> Hello,
> I can use zle -M to show messages from zle widget. It's wrapped normal
> widget, wrapping done by syntax-highlighting, and from the wrapping
> code zle -M is called.
>
> But if I try to use POSTDISPLAY, it doesn't work, no message under
> prompt is shown. Any idea why?
>
> Tried:  POSTDISPLAY=$'\n'"Test"
> --
> Best regards,
> Sebastian Gniazdowski

Re: Cannot tell why POSTDISPLAY doesn't work

[Peter Stephenson]

On Fri, 8 Jun 2018 16:38:43 +0200
Sebastian Gniazdowski <sgniazdowski@gmail.com> wrote:
> On 5 June 2018 at 16:50, Sebastian Gniazdowski
> <sgniazdowski@gmail.com> wrote:
> > Hello,
> > I can use zle -M to show messages from zle widget. It's wrapped
> > normal widget, wrapping done by syntax-highlighting, and from the
> > wrapping code zle -M is called.
> >
> > But if I try to use POSTDISPLAY, it doesn't work, no message under
> > prompt is shown. Any idea why?
>
> Some more data on this, POSTDISPLAY works, but only *sometimes*

Actually, that's an accident.

"zle -M" *simply* prints a message.  It doesn't interact with
the normal editing buffer at all (which is the thing to which
POSTDISPLAY is appended).  So if you're seeing it it's because it's
not overridden by the message.

It's worth scanning the zshzle manual to see if you're doing something
that might be better dealt with by Zle -R, which does a normal
redisplay with an optional message --- this is commonly the case
when within widgets.

pws

Re: Cannot tell why POSTDISPLAY doesn't work

[Sebastian Gniazdowski]

On 8 June 2018 at 17:10, Peter Stephenson <p.stephenson@samsung.com> wrote:
> "zle -M" *simply* prints a message.  It doesn't interact with
> the normal editing buffer at all (which is the thing to which
> POSTDISPLAY is appended).  So if you're seeing it it's because it's
> not overridden by the message.
>
> It's worth scanning the zshzle manual to see if you're doing something
> that might be better dealt with by Zle -R, which does a normal
> redisplay with an optional message --- this is commonly the case
> when within widgets.

I just realized it is zsh-users/zsh-autosuggestions is also using
POSTDISPLAY. When I enter weird command with "-" in the middle, then
zsh-autosuggestions doesn't have any string to suggest and doesn't
touch my POSTDISPLAY. Now how to dig out from this. I've tried zle -R
but it doesn't help.

-- 
Best regards,
Sebastian Gniazdowski