[nottorp]

Yes but there's no way for the OS to know if the focus request is legitimate, is there?

Can't even say "browsers are allowed to grab focus" because they'll grab it for a stupid window telling you to update the browser or what new features no one cares about they introduced.

I'd prefer to have to switch focus to the browser manually than have the stupid ubuntu update manager steal focus when i'm typing in the terminal...

[elehack]

The article is about a mechanism for the OS to validate focus requests. The application with the link requests a focus token, and passes it to the browser along with the open-link request, and the browser can then request focus.

It isn't perfect, because there's no way to know that the browser isn't using the token to request focus for something else, but maintaining and validating chain of custody for focus across applications is exactly the problem it looks like they are working on solving.

[xp84]

That was exactly the example given in the article, but somehow this isn't what I expected would happen if I click a link in say, my email client or chat program.

I imagined it more like: User clicks link in email program. Email program tells OS: "Here, open https://..." -- OS checks URL scheme registry and selects Firefox, OS brings Firefox to the front and throws the URL at it and says "Open this."

I guess perhaps my naïve way could falls down if the OS accepts URLs from apps that aren't in the foreground, so a random background process could activate any app it wants to steal focus.

[elehack]

Yep. With the solution discussed, as I understand it, the e-mail program just needs to be modified to request a focus token and send it along with the URL request to the browser or the OS browser dispatch service to keep the expected behavior.

This could be abstracted by libraries (e.g. a method in Qt to open a URL in the system browser automatically gets the token) so each application doesn't need to be updated separately, or possibly even OS services.

[Ukv]

> Yes but there's no way for the OS to know if the focus request is legitimate, is there? Can't even say "browsers are allowed to grab focus" because [...]

To my understanding, the approach described in the article is that the currently active program requests a token and then passes that along to the program that it wants to take focus. Compositor can also check what triggered the request (mouse click? global keybind?) to decide if the request is legitimate.

That seems reasonable to me, opposed to requiring the user to switch over to a new window every time they `right click -> show in file browser` a file in their IDE, or after they press a hotkey to open a screenshot tool, or so on.

[nottorp]

> Compositor can also check what triggered the request (mouse click? global keybind?) to decide if the request is legitimate.

That's what I'm dubious about. But I haven't look at the details ofc.