Subject: Re: bug#68446: 29.1.90; Bidi right-to-left paragraphs missing text in Org mode

From: Ihor Radchenko <[email-masked]>
Date: Sun, 14 Jan 2024 12:11:03 +0000

Eli Zaretskii <[email-masked]> writes:

>> 1. In emacs -Q, create an empty buffer with Org mode active and type:
>> 
>> a [[link]]
>> 
>> 2. Evaluate: (setq bidi-paragraph-direction 'right-to-left)
>> 3. Note the "a" and link are no longer visible.
>
> I think it's an Org bug: it should prevent bidi reordering inside the
> "[[link]]" string.  For example, wrap the "[[link]]" thing in LRO..PDF
> bidi controls.  Because without that, the brackets can be mirrored by
> bidi reordering and the BPA algorithm, and the link is no longer in
> the form that Org expects.  The result is that the entire text becomes
> invisible.

May you please elaborate? I do not see anything unexpected in the text
properties that Org mode applies to the link and the letter "a".

In fact, after following the reproducer, and enabling visible-mode, M-x
describe-text-properties on "a" yields

    Text content at position 101:

    There are text properties here:
      fontified            t

Yet, "a" is rendered invisible.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
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