Re: Adding indent-bars to ELPA

[Eli Zaretskii <eliz@gnu.org>]

> From: JD Smith <jdtsmith@gmail.com>
> Date: Wed, 24 Jul 2024 15:32:21 -0400
> Cc: emacs-devel <emacs-devel@gnu.org>
> 
> > It seems to work well, but has some problems with RTL text.  To see
> > this, visit xdisp.c, turn on the mode, then go to around line 1900,
> > set bidi-paragraph-direction to 'right-to-left', and scroll up and
> > down several times: you will see broken bars, both with
> > indent-bars-prefer-character nil and non-nil.
> 
> Hmm, I can say it's definitely never been tested with RTL.  Is that a mode people typically use for column-oriented content like code or config files?  Do you mean broken bars in the top partially displayed line?  I don't see any artifacts in RTL other than this, but I can't rule out build-dependent issues of course.

RTL text is generally for human-readable text, not for program source.
But (a) I see no reason why this feature must never be supported for
text files (think Org, for example), and (b) these problems indicate
some subtle issues with display stuff in the package, so I'd suggest
at least to understand why they happen, if not fix them -- it could
well be that this is just a tip of some larger iceberg.

As for where I see broken bars: yes, they are at the top, but at least
with indent-bars-prefer-character I saw them crop up in the middle as
well, after I scrolled up and down several times.  I think I saw them
also with indent-bars-prefer-character nil, but I'm less sure.