Custom Compose key sequences don't work in Signal

[cshaa]

I use Compose key with custom sequences defined in ~/XCompose. I can use these sequences in all apps (even Flatpak ones) except for Signal. In Signal, compose key works, but only the default predefined sequences are available.

As a walkaround, I have to switch to a different app, type the symbols I need, copy them, switch back to Signal, and paste. Doing this several times a day gets a bit annoying, so if there was a way to resolve this, I'd love it.

[bermeitinger-b]

Which other Flatpak apps allow this feature so that we can adapt it here?

[cshaa]

I'm not sure which other apps do this, but running the following command fixed my issue:

flatpak override org.signal.Signal --filesystem=/home/csha/.XCompose

[bermeitinger-b]

Yes, well, that's the problem with sandboxing. You can't get out of it. Thank you for posting the answer.

The security considerations were too strict many users here that the access is only allowed to certain folders by default. (#153, #154, #181, #182, #183, #185)

[kierun]

I have the same issue and
flatpak override org.signal.Signal --filesystem=/home/user/.XCompose does nothing for me. I had to use sudo to get it to even run.

√ ; bat /var/lib/flatpak/overrides/org.signal.Signal
───────┬────────────────────────────────────────────────────────────────────────
       │ File: /var/lib/flatpak/overrides/org.signal.Signal
───────┼────────────────────────────────────────────────────────────────────────
   1   │ [Context]
   2   │ filesystems=home;/home/user/.XCompose;
───────┴────────────────────────────────────────────────────────────────────────