Add Screensaver Start/End Scripts

Things like suspending heavy applications and updating status in
Homeassistant

desktop/screensaver_end.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+ps -e -o stat,command,pid | grep '^T' | grep -P "(firefox|atom)" | awk '{print $NF}' | xargs -P0 -I {} kill -CONT {}

desktop/screensaver_start.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+# MPRIS = Media Player Remote Interfacing Specification
+firefox_mpris_dbus=$(dbus-send --print-reply --dest=org.freedesktop.DBus  /org/freedesktop/DBus org.freedesktop.DBus.ListNames | grep -Po "org.mpris.*firefox[^\"]+")
+
+if [ -n ${firefox_mpris_dbus} ]; then
+  playback_string=$(dbus-send --print-reply --dest=${firefox_mpris_dbus} /org/mpris/MediaPlayer2 org.freedesktop.DBus.Properties.Get string:'org.mpris.MediaPlayer2.Player' string:'PlaybackStatus' | grep -Po "(?<=string \")[^\"]+")
+fi
+
+# Suspend Firefox processes if not playing media
+if [ -z "${playback_string}" ] || [ "${playback_string}" != "Playing" ]; then
+  ps aux | grep [f]irefox/[f]irefox | awk '{print $2}' | xargs -P0 -I {} kill -STOP {}
+fi
+
+# Suspend Atom processes
+ps aux | grep "/[a]tom" | awk '{print $2}' | xargs -P0 -I {} kill -STOP {}