> For multi-window applications you're not inside "your own window", you own many windows. Are apps not allowed to get and set properties of windows they spawn under Wayland?
Depends on what you're calling properties of the window, wayland does of course have a number of things like that but not all of them are the same as X11 used to be. I don't believe it's got a way to get the position of your own window, and does not have a way to set the position at all since that's considered a property of the compositor's handle on the surface IIRC (not exactly the same as the window, since the compositor can be putting decorations on the surface like the title bar, controls, etc.).
A lot of it is consequences of moving some security fences around as other commenters have mentioned, because over the decades a lot of applications (not necessarily on linux or X11, but it has happened there still) have used those other barrier's leakage to do nefarious things like steal passwords, pop up ads on top of what you're doing, etc.
I would definitely support an argument that they swung the pendulum further towards "secure by default, even at the expense of what people need" but I'm actually happy they did, because it's quite a bit easier to add the functionality in after you've got something that's secure, rather than design a new barrier that breaks existing things after the fact.
> Depends on what you're calling properties of the window, wayland does of course have a number of things like that but not all of them are the same as X11 used to be.
Well, technically Wayland has no such thing as properties. It only has requests and events on objects, and no protocol behave like an arbitrary key value store the same way X11 atoms do.
You can't ask Wayland how big your window is or should be for example, you decide how big it is right now when you submit a graphics buffer in a requests, and the Wayland server will tell you in an event if it would like it to be a different size (say, because someone dragged a server side decoration or because the window became fullscreen).
A key difference between Wayland and X11 is that Wayland is very explicit in how functionality is defined and added.
Depends on what you're calling properties of the window, wayland does of course have a number of things like that but not all of them are the same as X11 used to be. I don't believe it's got a way to get the position of your own window, and does not have a way to set the position at all since that's considered a property of the compositor's handle on the surface IIRC (not exactly the same as the window, since the compositor can be putting decorations on the surface like the title bar, controls, etc.).
A lot of it is consequences of moving some security fences around as other commenters have mentioned, because over the decades a lot of applications (not necessarily on linux or X11, but it has happened there still) have used those other barrier's leakage to do nefarious things like steal passwords, pop up ads on top of what you're doing, etc.
I would definitely support an argument that they swung the pendulum further towards "secure by default, even at the expense of what people need" but I'm actually happy they did, because it's quite a bit easier to add the functionality in after you've got something that's secure, rather than design a new barrier that breaks existing things after the fact.