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Re: A question about overlays and performance.

From: Juri Linkov
Subject: Re: A question about overlays and performance.
Date: Wed, 29 Jul 2020 02:53:52 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (x86_64-pc-linux-gnu)

> I am currently working on re-implementing org-mode folding from using
> overlays to text-properties.

Any chance to fix also bug#40808? It's still open because there is
no solution for isearching invisible text in org-mode.

Here's a short test case that demonstrates the problem in org-mode:

0. emacs -Q
1. visit emacs/etc/ORG-NEWS
2. isearch for "http": C-s http C-s C-s C-s ...

it eventually stops at org links where "http" is invisible, such as


The problem is that org-mode puts the text property 'invisible'
only when the link is scrolled into view, I guess it puts the property
using font-lock.

So it seems org-mode needs to use font-lock-ensure on the line
with the next search hit before calling isearch-filter-predicate
on the found occurence.

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