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* [BUG] Emacs tries to recenter / rescroll when it hits hidden org emphasis [9.4.6 (9.4.6-798-g738759.dirty-elpaplus @ .emacs.d/elpa/develop/org-plus-contrib-20210929/)]
@ 2022-01-04 18:11 Chris Findeisen
  0 siblings, 0 replies; only message in thread
From: Chris Findeisen @ 2022-01-04 18:11 UTC (permalink / raw)
  To: emacs-orgmode

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Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.  You don't know how to make a good report?  See

     https://orgmode.org/manual/Feedback.html#Feedback

Your bug report will be posted to the Org mailing list.
------------------------------------------------------------------------

To reproduce this:
1. Load the repro emacs settings.
2. Scroll down in a buffer, such that top of buffer is not visible on
screen.
3. Create an emphasized word at the beginning of the 2nd visual-line in a
visually-wrapped line.
4. Move your point to the start of that emphasized word

It's a little difficult to describe, so I'll give an example. Assume
that the visual-line wrapping is happening at the place indicated by
"$".


```
So, if this were one long line, then this is the first visual line,$
/whereas/ this is the second visual line in the paragraph, and you'd place$
point on the italicized "w" in the word "whereas". That triggers the bug.
```

What happens next is that emacs thinks the point is no longer on screen
and tries to scroll to fix that. Under vanilla emacs, it will just
recenter the point. This still is misbehaving but not terribly. However,
with
smooth-scrolling as mentioned above, the behavior is worse. The window
scrolls up and point jumps to the top of the window.

Reproed this with the following: emacs -Q
with the following:
```
(setq org-hide-emphasis-markers t)

(org-mode)
(visual-line-mode 1)

;; Without this, emacs will still show bug by calling recenter, but the
effect is particularly egregious with these settings (i.e. smooth scrolling)
(setq scroll-conservatively 101
      scroll-preserve-screen-position t
      scroll-margin 0)
```

Emacs  : GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.5,
cairo version 1.16.0)
 of 2021-02-09, modified by Debian
Package: Org mode version 9.4.6 (9.4.6-798-g738759.dirty-elpaplus @
.emacs.d/elpa/develop/org-plus-contrib-20210929/)

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2022-01-04 18:11 [BUG] Emacs tries to recenter / rescroll when it hits hidden org emphasis [9.4.6 (9.4.6-798-g738759.dirty-elpaplus @ .emacs.d/elpa/develop/org-plus-contrib-20210929/)] Chris Findeisen

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