1634444 - Themed scrollbars are no longer working in GTK

Status: RESOLVED WORKSFORME

(Core :: Widget: Gtk, defect)

Description

[Asif Youssuff]

Attachment: scrollbars now.png

I would have noticed this a while ago, but I have been using Yaru, and Yaru's scrollbars are very similar to Adwaita.

Steps to reproduce:

1. Install Plata theme: https://gitlab.com/tista500/plata-theme
2. Enable "Plata Lumine" in GNOME Tweaks
3. Open Firefox and any web page

What happens:

The scrollbars that appear in the browser chrome are using what looks to be Adwaita.

Expected result:

Non-curved scrollbars from Plata.

123:54.06 INFO: No more integration revisions, bisection finished.
123:54.06 INFO: Last good revision: 92111df0dbd94e41565c0d65b52116579f37b032
123:54.06 INFO: First bad revision: 167a564b3fda4eb8f853b3b69abbe31db671e1a5
123:54.06 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=92111df0dbd94e41565c0d65b52116579f37b032&tochange=167a564b3fda4eb8f853b3b69abbe31db671e1a5

This appears to be regressed by bug 1527048, and from my reading of that bug, this is unexpected behavior, since Plata Lumine is not a "dark theme".

More interestingly, if a user sets "Yaru", a close inspection shows that it doesn't actually look like Yaru is being used for the scrollbar -- in Yaru, the scrollbar track is invisible, while the one shown in Firefox today is gray. My guess is that this is actually Adwaita.

Comment 1

[Asif Youssuff]

Attachment: themed scrollbars (plata)

Comment 2

[Asif Youssuff]

Attachment: yaru post firefox 68

Comment 3

[Asif Youssuff]

Attachment: yaru prior to Firefox 68

Comment 4

[Asif Youssuff]

Very strange. I rebooted my machine after applying updates and I can't reproduce this any more.