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From: Roman Perepelitsa <roman.perepelitsa@gmail.com>
Date: Fri, 10 Jan 2020 19:43:39 +0100
Message-ID: <CAN=4vMqhz83ttgn08GLwCB8DQ4e3DEtbObDHP4BCdX+zmreqkg@mail.gmail.com>
Subject: Re: z-sy-h and z-asug: zle-line-pre-redraw, POSTDISPLAY, coexistence
 (was: Re: emulate bash key bindings)
To: Daniel Shahaf <d.s@daniel.shahaf.name>
Cc: Zsh Users <zsh-users@zsh.org>, ericdfreese@gmail.com
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On Fri, Jan 10, 2020 at 7:29 PM Daniel Shahaf <d.s@daniel.shahaf.name> wrot=
e:
> I assume that a dummy widget that does =C2=AB{ POSTDISPLAY=3Dfoo;
> region_highlight+=3D( "$#BUFFER $(($#BUFFER + 2)) bold" ) }=C2=BB
> could be used to mock z-asug for the purposes of the coexistence
> issue?

Yeah, I think so. Perhaps use $#POSTDISPLAY instead of 2 to avoid
mistakes there.

> > I'm trying to finish a couple of large features for p10k (which
> > incidentally includes writing a zsh parser in zsh)
>
> Isn't that basically what z-sy-h's main highlighter does?

Yep.

I wasn't able to find an existing library to do this. z-sy-h's main
highlighter isn't factored out, so I cannot reuse it. I also want
something a bit more precise and performant. On the plus side my goal
is more modest than z-sy-h. I only need to extract "command" words.
For example, given this zsh code:

  () { sudo foo bar && baz }

I want to get "sudo" "foo" and "baz".

I've written some code that works decently well but needs a bit more
polish. It's more precise than z-sy-h but still doesn't handle some
corner cases. For example, given this setup:

  setopt interactive_comments
  alias foo=3D'bar #'

My code incorrectly extracts "bar" and "baz" from "foo; baz". It
should be just "bar" here.

Roman.