Warty Brown theme causes GTK3 Snap apps to use Adwaita theme

[vitalkanev]

Expected Behavior

Snap apps should use Yaru Warty Brown theme, with Yaru menus and brown colours

Actual Behavior

Snap apps use Adwaita theme, with blue colours and semi-gradiented title bar. Also blue background in menu highlights.

This issue only happens with Warty Brown theme, other versions of the Yaru theme are not affected.

Steps to Reproduce the Problem

1. Get Oracular daily build and update it
2. Open GNOME Control Centre, go to "Appearance", click Warty Brown
3. Open any Snap GTK3 app (like Firefox and Thunderbird)
4. For Firefox, look at the address bar and right click in the page - you will see blue coloured menu items
5. For Thunderbird, open About page and notice blue links, also the tab top border is blue

Software that presents the issue

$ snap list
...
firefox                    130.0-2          4848   latest/stable/…  mozilla✓    -
...
gtk-common-themes          0.1-81-g442e511  1535   latest/stable    canonical✓  -
...
thunderbird                128.2.0esr-1     509    latest/stable/…  canonical✓  -

Yaru version

$ apt policy yaru-theme-gtk
yaru-theme-gtk:
  Installed: 24.10.4-0ubuntu1
  Candidate: 24.10.4-0ubuntu1
  Version table:
 *** 24.10.4-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu oracular/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu oracular/main i386 Packages
        100 /var/lib/dpkg/status

Ubuntu version

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu Oracular Oriole (development branch)
Release:	24.10
Codename:	oracular

$ cat /var/log/installer/media-info 
Ubuntu 24.10 "Oracular Oriole" - Daily amd64 (20240822)

Screencast
Attached is a screencast, which shows behaviour for both Yaru (orange) and Yaru Warty Brown themes.

Screencast.From.2024-09-11.14-13-55.webm

[Muqtxdir]

maybe the gtk-common-themes snap might have not be synced to the latest deb package of yaru-theme from oracular?

[jhenstridge]

We do have a new release of gtk-common-themes close to release, which supports the new accent colours. If you would like to test it before it makes it to stable, instructions can be found here:

https://forum.snapcraft.io/t/call-for-testing-gtk-common-themes-october-2024-update/43361?u=jamesh