noctalia-shell/Services/LockKeysService.qml

pragma Singleton

import QtQuick
import Quickshell
import Quickshell.Io
import qs.Commons

Singleton {
  id: root

  property bool capsLockOn: false
  property bool numLockOn: false
  property bool scrollLockOn: false

  signal capsLockChanged(bool active)
  signal numLockChanged(bool active)
  signal scrollLockChanged(bool active)

  Process {
    id: stateCheckProcess

    property string checkCommand: " \
caps=0; cat /sys/class/leds/input*::capslock/brightness 2>/dev/null | grep -q 1 && caps=1; echo \"caps:${caps}\"; \
num=0; cat /sys/class/leds/input*::numlock/brightness 2>/dev/null | grep -q 1 && num=1; echo \"num:${num}\"; \
scroll=0; cat /sys/class/leds/input*::scrolllock/brightness 2>/dev/null | grep -q 1 && scroll=1; echo \"scroll:${scroll}\"; \
"
    command: ["sh", "-c", stateCheckProcess.checkCommand]

    stdout: StdioCollector {
      onStreamFinished: {
        var lines = this.text.trim().split('\n')
        for (var i = 0; i < lines.length; i++) {
          var parts = lines[i].split(':')
          if (parts.length === 2) {
            var key = parts[0]
            var newState = (parts[1] === '1')

            if (key === "caps") {
              if (root.capsLockOn !== newState) {
                root.capsLockOn = newState
                root.capsLockChanged(newState)
                Logger.i("LockKeysService", "Caps Lock:", capsLockOn)
              }
            } else if (key === "num") {
              if (root.numLockOn !== newState) {
                root.numLockOn = newState
                root.numLockChanged(newState)
                Logger.i("LockKeysService", "Num Lock:", numLockOn)
              }
            } else if (key === "scroll") {
              if (root.scrollLockOn !== newState) {
                root.scrollLockOn = newState
                root.scrollLockChanged(newState)
                Logger.i("LockKeysService", "Scroll Lock:", scrollLockOn)
              }
            }
          }
        }
      }
    }
    stderr: StdioCollector {
      onStreamFinished: {
        if (this.text.trim().length > 0)
        Logger.i("LockKeysService", "Error running state check:", this.text.trim())
      }
    }
  }

  Timer {
    id: pollTimer
    interval: 200
    running: true
    repeat: true
    onTriggered: {
      if (!stateCheckProcess.running) {
        stateCheckProcess.running = true
      }
    }
  }

  Component.onCompleted: {
    Logger.i("LockKeysService", "Service started, performing initial state check.")
    stateCheckProcess.running = true
  }
}