PSA: It's Electron, vscodium or vscode, not your KDE desktop.
I spent the morning trying to work out why all the Electron applications on my desktop (vscodium, the Signal client …) were once-a-fuc•ing-gain showing me clunky, foreign file-open and file-save dialogues (presumably from gtk) instead of correctly showing KDE's dialogues via the very-cursed XDG-desktop-portal mechanism.
I'm on Gentoo. Had I, perhaps, broken something?
Nope. It's just yet another regression up-stream, in Electron:
Once again, despite knowing that nobody has support for something because that thing has not been released as stable at all, yet, the whole Electron stack follows the belief that it's perfectly OK to release a change that depends on that thing and, without it, breaks every KDE user's desktop integration.
Then they blame it on xdg-desktop-portal not having released, yet. And won't roll the change back because December is their "quiet month" – neither will they fix it nor make a work-around, seemingly.
Anyway. Writing this post has served to exhaust my ire. One day, we'll see the back of Electron for good – I can only hope!
Let it also serve as a PSA: don't bother trying to work out if you've accidentally broken something on your Linux desktop – particularly if you're on Gentoo, Arch, Slackware or other hacker-friendly distribution. It's not you. It's not your system. It's just fuc•ing Electron – again!
It is understandable people are frustrated, I am frustrated, and joined several conversation regarding this problem. However, I don't appreciate some of the rant from many users. This change is certainly out-of-touch, potentially due to them don't quite foresee the amount of flatpak/kde users who are affected by this change.
But many complaints have been dangerously close to the line, if not over the line. Their quiet month policy is reasonable IMO, developers need breaks, especially those interacts frequently with the community. Love or hate electron (same apply to CEF), these works clearly bring many wonderful apps into the linux world.
I personally don't believe that non-contributors have the right to demand free work from the electron developers.
It seems like a lot of people who do that don't understand that there's an inverse relationship between devs soaking up all the emotional labor that comes with being the target of end users' ire and having the energy to get the actual work done. Especially when it comes to open source stuff, they could literally be spending the time they're spending shouting at a dev to do more dev things like.. learning to fix it themselves and submitting a commit.
The Electron project made an extremely stupid decision. Individual people who are left to wrangle with the fall-out and manage the PR have nothing but my utmost sympathy, as do all the down-stream projects (Signal, Discord, VSCodium…) who have to do the same. Even the developers of xdg-desktop-portal are facing unnecessary backlash because of this. Their release schedule and time-line for when org.freedesktop.portal.FileChooser v. 4 could be reliably expected to exist in the wild was surely not kept in secret!
I feel one of the hardship for Linux to catch on is the lack of commercial interest to make it usable for consumers.
If this problem happened on Windows and macOS, MS and Apple would just send an engineer to spend a week or a day to have it fixed. This change has been in electron for months, and no one bother to fix it.
To lighten the mood, here's a screenshot of one of the lowest points I achieved while hacking away, trying to resolve the issue:
What even is going on, there?
pixelated menu
"Cancel" button at the top left??
"Open" button at the top right??
clearly Adwaita but not actually Adwaita as configured – the VSCodium window (behind) shows how Adwaita is actually configured on my system and that's how all native gtk applications actually draw.
But isn't that the new gtk adwaita file chooser? I kinda dislike how those action buttons in dialogs are in the headerbar now but that's now just how it is.
The new Gnome file chooser is part of Gnome's Files app and I doubt OP has that installed when they're using KDE Plasma. Aside from that, I'm also pretty sure this is the default GTK file chooser (so the old one) from the way it looks. For context, I use Gnome.
Another example of Microsoft using its control of FOSS projects to push you towards their web-based alternatives of something you already have except now for the low low price of a monthly subscription fee, AI slop, and all ur data.
The apps are Flatpak'ed, so they update independently of the system.
But yeah why did Flatpak update them when Flatpak has unsatisfied dependencies? (To be fair the apps still work, it's mostly a ergonomic and cosmetic regression)
This doesn't only affect Flatpak apps. The xdg-desktop-portal mechanism is used by many things. Even "gtk native" applications like Firefox use it when running on a correctly configured KDE environment and one of the nuances of this issue is that those applications – today – continue to work perfectly. Electron is not part of their stack.
I have flatpak on my desktop just for Steam and even flatpak'd steam still seems to work, correctly.
In their defence: it isn't a direct dependency, it isn't advertised, and it is likely that the distro package maintainers just don't know about it – Electron hardly announce that they chose to depend on something that they know isn't released, anywhere, yet, and won't be for months.
So these things always get me confused because I swear there was a neat electron thing in the single digit two thousands that was a small project and really cool and I keep on expecting this to be the grown up version but when I look it up they seem to have nothing to do with each other. I can't even find the thing I remember from early in the millenium.