[Bug]: wayland window decorations mangled and not clickable

[csett86]

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a bug report that matches the one I want to file, without success.

Electron Version

19.0.7

What operating system are you using?

Ubuntu

Operating System Version

22.04

What arch are you using?

x64

Last Known Working Electron version

19.0.0-alpha.3

Expected Behavior

Running under wayland natively (--ozone-platform=wayland) and enabling window decorations (app.commandLine.appendSwitch('enable-features', 'WaylandWindowDecorations'); in main.js) should show a title bar which is clickable.

Below is from 19.0.0-alpha.3 where it still worked:

Actual Behavior

Running under wayland natively (--ozone-platform=wayland) and enabling window decorations (app.commandLine.appendSwitch('enable-features', 'WaylandWindowDecorations'); in main.js) shows mangled transparent border on the left side instead of a title bar and is not clickable:

On electron 19 is broke during the alpha and beta cycle:

Below is from 19.0.0-alpha.4 where it first broke, here the buttons are still clickable:

Starting with 19.0.0-beta.4 the buttons are also no longer clickable:

With 19.0.0 up and until 19.0.7 the same, broken titlebar and not clickable:

On electron 18-x-y it also broke between 18.2.0 and 18.2.1, but only the buttons cannot be clicked any longer:

18.2.0 still everything ok, titlebar there and clickable:

18.2.1: Titlebar still there, but no longer clickable:

Up and including 18.3.5 the titlebar stays there, but not clickable:

Testcase Gist URL

https://gist.github.com/csett86/5d45c47cb1d5331b9ede0788ff5ae284

Additional Information

To reproduce with the gist, you need to add --ozone-platform=wayland to the user-provided flags, as I could find a way to add this to the fiddle (the WaylandWindowDecorations are part of the fiddle):

[csett86]

I also already tried myself if I could spot an obvious commit that broke it on either 18 or 19 between the mentioned releases, but so far had no luck there.

[csett86]

FYI @refi64

[refi64]

I'll make sure to look into this soon-ish, but it might take a hot minute.

[GrantMoyer]

I ran a git bisect. The mangled decorations were introduced by 7c0ed9e … somehow. I double checked too; no mangled decorations in the parent commit, mangled in 7c0ed9e.

I did not test for when clickability broke.