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bug#42653: Emacs now recentering very aggressively
From: |
Dale Sedivec |
Subject: |
bug#42653: Emacs now recentering very aggressively |
Date: |
Thu, 10 Sep 2020 16:18:55 -0500 |
Hi, as of commit a07ec21bf24b, which is said to address bug #42653, Emacs
started recentering as I scroll up. Here's a minimal reproduction case:
1. emacs -Q
2. Display anything in the header line: (setq-default header-line-format "foo")
3. Open any file longer than a few screenfuls: M-x find-library RET subr RET
4. Enable which-function-mode: M-x which-function-mode RET
(display-line-numbers-mode also triggers this problem, but I find
which-function-mode more interesting since it doesn't change the display of the
buffer at all, only the mode line.)
5. M-> (end-of-buffer)
6. Page up a few times with M-v (scroll-down-command)
Expected behavior: Point is sitting at the bottom line of the window no matter
how many times you page up
Observed behavior: The window is recentered, usually after ever page up, with a
slight delay
Here's a video of this behavior, in case it helps:
https://www.dropbox.com/s/i7m2h9ltwrpxxy3/emacs_scrolling.mp4?dl=0
emacs-version: GNU Emacs 28.0.50 (build 1, x86_64-apple-darwin18.7.0, NS
appkit-1671.60 Version 10.14.6 (Build 18G6020)) of 2020-09-10
I built this today from master, 70a8d06fe1.
I can stop this from happening with (setq scroll-conservatively 101), so
perhaps the behavior is intentional? However, the fact that point stays at the
bottom of the window for a brief instant, and then only recenters when (I am
**guessing**) which-func-update runs leads me to believe this is unintentional
behavior.
Please let me know if you need any more information.
Regards,
Dale
- bug#42653: Emacs now recentering very aggressively,
Dale Sedivec <=