os/modules/graphical/sway/config/config.d/mode_system.conf.nix

{
  pkgs,
  psCfg,
  ...
}:
with pkgs;
  ''
    # Set shut down, restart and locking features
  ''
  + (
    if psCfg.core.hibernation.enable
    then ''
      set $mode_system (e)xit, (l)ock, (h)ibernate, (r)eboot, (Shift+s)hutdown
    ''
    else ''
      set $mode_system (e)xit, (l)ock, (r)eboot, (Shift+s)hutdown
    ''
  )
  + ''
    bindsym $mod+0 mode "$mode_system"

    mode "$mode_system" {
      bindsym e exec ${sway}/bin/swaymsg exit, mode "default"
      bindsym l exec ${swaylock-bg}/bin/swaylock-bg, mode "default"
  ''
  + (
    if psCfg.core.hibernation.enable
    then ''
      bindsym h exec ${systemd}/bin/systemctl hibernate, mode "default"
    ''
    else ""
  )
  + ''
        bindsym r exec ${systemd}/bin/systemctl reboot, mode "default"
        bindsym Shift+s exec ${systemd}/bin/systemctl poweroff, mode "default"

        # exit system mode: "Enter" or "Escape"
        bindsym Return mode "default"
        bindsym Escape mode "default"
    }
  ''