Hot corners

[YaLTeR]

Top-left hot corner to open the overview is my favorite gesture in GNOME Shell when using the mouse. We don't have an overview yet, but once we do, I will certainly want the hot corner.

Config wise, they can probably go in binds {} since they are discrete actions. Something like TopLeftHotCorner { open-overview; }. Though, one question is how to configure the outputs, and if that's even needed.

Implementation wise, can probably copy whatever GNOME Shell does, it works well there.

There's apparently a client-side solution for this: https://github.com/AndreasBackx/waycorner. I haven't tried it (tbh I'm not sure what I'd use a hot corner for other than opening the overview), but once the overview happens, I'll probably want the top-left hot corner by default, and this means it needs to be built into niri. It should be fine because I expect hot corners to be relatively light code-wise.

[mastoca]

I've only ever used hot corners for entering overviews, start screensaver/lock-screen, and on places I have touch gestures to perhaps open a quick note (on ipad).

[salman-farooq-sh]

I used waycorner for a while. It was janky, and thus very unreliable, to trigger it even after I tried with increased detection area config thingy it has.