xss-lock: use a simpler process to dim display

Just set a low brightness.

bin/xss-lock

@@ -20,9 +20,20 @@ case "$1" in
         ;;
     dim|notify)
         echo "notify: start"
+        redshift=$(systemctl --user show \
+                             --property MainPID \
+                             --value redshift@$(systemd-escape -- "$DISPLAY").service)
+        [ x$redshift = x ] || {
+            kill -STOP $redshift
+            trap "kill -CONT $redshift" EXIT
+        }
         trap 'echo notify: user activity; kill %% 2> /dev/null; exit 0' HUP  # user activity
         trap 'echo notify: locker started; kill %% 2> /dev/null; exit 0' TERM # locker started
-        /usr/lib/xscreensaver/bsod &
+        outputs=($(xrandr -q | sed -n 's/\([^ ]*\) connected .*/\1/p'))
+        for out in ${outputs[@]}; do
+            xrandr --output $out --brightness 0.2
+        done
+        sleep infinity &
         wait
         echo "notify: end"
         ;;

rc/rules.lua

@@ -13,9 +13,6 @@ awful.rules.rules = {
    -- i3lock
    { rule = { name = "i3lock" },
      properties = { ontop = true } },
-   -- Apple2
-   { rule = { class = "BSOD" },
-     properties = { fullscreen = true, ontop = true, floating = true, sticky = true } },
    -- Browser stuff
    { rule = { role = "browser" },
      callback = function(c)

rc/tags.lua

@@ -64,7 +64,7 @@ shifty.config.apps = {
       intrusive = true,         -- Display even on exclusive tags
    },
    {
-      match = { class = { "Key[-]mon", "BSOD" },
+      match = { class = { "Key[-]mon" },
                 role = { "pop[-]up" },
                 name = { "Firebug" },
                 instance = { "plugin[-]container", "exe" } },