[Feature] Support condition in listener configuration

[Diaoul]

The goal is to run a condition (or test_cmd) to know if the listener should trigger or not.

Use case: Based on whether my laptop is plugged or on battery I want different behaviors and avoid putting that logic in the on-timeout and on-resume as tests.

Current workaround:
I prefix my on-resume and on-timeout commands:

[ "$(cat /sys/class/power_supply/AC/online)" = "0" ] && brightnessctl ...

However, it's not perfect: I don't want the on-resume to run if in between I've plugged/unplugged my laptop. In other words, if the on-timeout did not trigger because of condition, I don't want the on-resume to run at all.

[Stridsvagn69420]

Bump. I was also just wondering how I would implement seperate behaviours for when my laptop is plugged in and when it is not.

Would love to also see battery-specific listener options, e.g. a direct setting for the condition that the laptop is not plugged in, or using a critical battery level as a secondary condition.

To elaborate on the latter: Hypridle would additionally trigger on-timeout if the battery is less than or equal to the critical value and the user is AFK. The system could then automatically suspend/hibernate/shutdown, given that the user is absent.