Wrong window title displayed in GNOME top bar

[gschaffner]

Description

With GNOME 3.32.2, the wrong window title is displayed in the top bar when the Cryptomator window is focused.

System Setup

• Operating system and version: Manjaro GNU/Linux 18.0.4 w/ GNOME 3.32
• Cryptomator version: 1.4.15
• Drive: FUSE

Steps to Reproduce

1. Open Cryptomator GUI and observe the GNOME top bar.

Expected Behavior

Cryptomator will be displayed as the window's title.

Actual Behavior

org.cryptomator.launcher.Cryptomator$MainApp is displayed as the window's title.

Reproducibility

Always

Additional Information

This bug is occurring on a fresh Manjaro installation with no prior use of Cryptomator.

[bilelmoussaoui]

It's due to a missing StartupWMClass key in the desktop file to allow GNOME Shell identify the application and display the right name.
Adding this to desktop file should fix it

StartupWMClass=skymatic-cryptomator

[overheadhunter]

@bilelmoussaoui conflicts with cryptomator/cryptomator-linux#10

[bilelmoussaoui]

@overheadhunter I should have mentioned that the WMClass I used was the one from the flatpak package. Not sure if it's the correct one
CC @x80486

[dhet]

I'm not sure if it's that simple. The StartupWMClass entry only provides a way to group windows of the same application together. It cannot be used to assign the WM class to an application.
One way to assign the WM class is via explicit gtk_window_set_wmclass() call (i.e. not possible from Java). I spend a few hours trying to find a way to do this with JavaFX but I couldn't find anything. Maybe the jpackager or appimagetool is worth a look?

Btw, in the current snapshot version the window title says "java" (see screenshot) and the WM class is also "java" which means that

• window grouping as it is right now does not work
• even if we set StartupWMClass=java, gnome will group all "java" applications under the Cryptomator icon
  (I tried plain JAR as well as AppImage)
  

[tobihagemann]

Calling native functions is within the realm of possibility. 😉 We have already done that for Windows and macOS but it wasn't needed for Linux yet. But of course, if there is another (and much simpler) way, that would definitely be preferred.

[x80486]

It's due to a missing StartupWMClass key in the desktop file to allow GNOME Shell identify the application and display the right name.
Adding this to desktop file should fix it

StartupWMClass=skymatic-cryptomator

Indeed, no problems with the Flatpak...check! 😎