From: Nick Helm <nick@tenpoint.co.nz>
To: 28342@debbugs.gnu.org
Subject: bug#28342: 26.0.50; (OSX) Jumpy Scrolling using Trackpad
Date: Thu, 07 Sep 2017 13:58:45 +1200 [thread overview]
Message-ID: <m2zia7uv56.fsf@tenpoint.co.nz> (raw)
In-Reply-To: <m2r2vnpb22.fsf@jamesretina.local.i-did-not-set--mail-host-address--so-tickle-me>
Eli Zaretskii <eliz@gnu.org> writes:
> Even simpler: after evaluating the first 2 of the above 3 settings,
> visit xdisp.c, then type this twice:
>
> C-u 1 C-v
>
> After you type this the second time, Emacs will infloop.
>
> This bug is already present in Emacs 25.1.
>
> I will look into this when I have time. Thanks for the recipe.
I see this here as well.
The problem might lie in window_scroll_pixel_based in window.c. A small
tweak seems to help:
--- src/window.c 2017-09-07 13:16:29.000000000 +1200
+++ src/window.c 2017-09-07 13:10:04.000000000 +1200
@@ -4835,7 +4835,7 @@
have the `scroll-command' property. This avoids the
possibility of point becoming "stuck" on a tall line when
scrolling by one line. */
- if (window_scroll_pixel_based_preserve_y < 0
+ if (window_scroll_pixel_based_preserve_y <= 0
|| !SYMBOLP (KVAR (current_kboard, Vlast_command))
|| NILP (Fget (KVAR (current_kboard, Vlast_command), Qscroll_command)))
{
next prev parent reply other threads:[~2017-09-07 1:58 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-04 0:22 bug#28342: 26.0.50; (OSX) Jumpy Scrolling using Trackpad James Nguyen
2017-09-05 20:14 ` Charles A. Roelli
2017-09-06 1:14 ` James Nguyen
2017-09-06 8:53 ` Alan Third
2017-09-06 16:55 ` Eli Zaretskii
2017-09-07 1:58 ` Nick Helm [this message]
2017-09-09 14:25 ` Eli Zaretskii
2017-09-09 14:22 ` Eli Zaretskii
2017-09-10 1:14 ` James Nguyen
2017-09-10 2:40 ` Eli Zaretskii
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