Windows jump when entering & leaving shell overview

[keynslug]

Before submitting

• [x] Make sure you have built the correct theme versions for gtk3, gnome-shell and cinnamon themes.

  I'm running Gnome Shell 3.38.1 under Wayland, installed from Arch repos. The arc-theme package built manually, here's excerpt from config.log:

  configure:2951: result: Building GTK3 theme 3.24
  configure:3040: result: Building GNOME Shell theme 3.38
  configure:3138: result: Building Cinnamon theme 4.6

• [x] Test whether the issue also appears with default themes (e.g. Adwaita for gtk and gnome).

  Doesn't reproduce under default shell theme.

Details

• Arch Linux
• gnome-shell 3.38.1-1
• arc-theme @ 0c53316 w/ font-size-patch
• Screen resolution: 2560x1440

See screencast.

At the end of leave overview animation windows noticably "jump" into place. At the start of enter overview animation there's similar jump though less pronounced.

Just to be sure I ran a fresh shell once more with all extensions disabled (except user themes obviously), the effect is still the same. To make screencast recording clearer I slowed down animations 3 times with Impatience extension.

font-size-patch

Added for completeness, hovewer I reproduced the issue without it applied as well.

diff --git a/common/gnome-shell/3.38/sass/_common.scss b/common/gnome-shell/3.38/sass/_common.scss
index 51f0bca..2068c9d 100644
--- a/common/gnome-shell/3.38/sass/_common.scss
+++ b/common/gnome-shell/3.38/sass/_common.scss
@@ -33,7 +33,7 @@ $asset_path: assets;
 //
 // Globals
 //
-$font-size: 11;
+$font-size: 9;
 $_bubble_bg_color: opacify($osd_bg_color,0.25);
 $_bubble_fg_color: $osd_fg_color;
 $_bubble_borders_color: transparentize($osd_fg_color,0.8);

---

EDIT 1: Added screen resolution, just in case.

[jnsh]

Thanks for the report. I had actually noticed this myself, but didn't even consider that it could result from the shell theme. I'll try to figure out a fix..

[drakkar1969]

I have the same issue. It appears to be caused by a padding property in the #overview section of the gnome shell SCSS. I would be happy to submit a PR for this, if ok by you @jnsh

[jnsh]

I would be happy to submit a PR for this, if ok by you @jnsh

That would be great. Thanks :)

[keynslug]

Nice work!