Add xscreensaver hot corners script

2 files changed, 101 insertions, 0 deletions

diff --git a/home/nipsy/common/optional/desktops/i3/default.nix b/home/nipsy/common/optional/desktops/i3/default.nix
index c7a521d..bbfc50c 100644
--- a/home/nipsy/common/optional/desktops/i3/default.nix
+++ b/home/nipsy/common/optional/desktops/i3/default.nix
@@ -36,6 +36,8 @@
         foreground = #e5e5e5
         cursor-color = #ffffff
       '';
+
+      "bin/xscreensaver-activate".source = ./xscreensaver-activate;
     };
 
     packages = [
@@ -79,6 +81,11 @@
           always = true;
           notification = false;
         }
+        {
+          command = "~/bin/xscreensaver-activate";
+          always = true;
+          notification = false;
+        }
       ];
       window.border = 0;
       window.commands = [
diff --git a/home/nipsy/common/optional/desktops/i3/xscreensaver-activate b/home/nipsy/common/optional/desktops/i3/xscreensaver-activate
new file mode 100755
index 0000000..b558da8
--- /dev/null
+++ b/home/nipsy/common/optional/desktops/i3/xscreensaver-activate
@@ -0,0 +1,94 @@
+#!/usr/bin/env zsh
+
+# record our own PID to avoid duplicate invocations
+PIDFILE="/dev/shm/${0:t}.pid"
+
+# check for already running script
+if [[ -f ${PIDFILE} ]]; then
+	for i in $(pidof -x ${0:t}); do
+		if [[ ${i} -eq $(cat ${PIDFILE}) ]]; then
+			echo "${0:t} already running!" >&2
+			exit 1
+		fi
+	done
+fi
+
+# record current PID
+echo ${$} > ${PIDFILE}
+
+# wait a bit for everything to start
+sleep 30
+
+# check whether xscreensaver itself is running and start it if not
+if ! systemctl --user --quiet is-active xscreensaver.service; then
+	systemctl --user start xscreensaver.service
+fi
+
+# retrieve current Xorg screen size so we know where the corners are
+xrandr | grep ^Screen | grep -Eo 'current [[:digit:]]+ x [[:digit:]]+' | cut -d' ' -f2,4 | read max_x max_y
+echo "read screen size as ${max_x} x ${max_y}"
+
+# main loop
+while true; do
+
+	# retrieve current mouse position and set environment variables
+	eval $(xdotool getmouselocation --shell)
+
+	# keep xscreensaver deactivated if we're in the top right corner of the screen
+	if [[ ${X} -eq $((max_x - 1)) && ${Y} -eq $((max_y - max_y)) ]]; then
+
+		# make sure xscreensaver is even running before telling it to stay idle
+		if pidof xscreensaver &>/dev/null; then
+			sleep 5
+			xscreensaver-command -deactivate &>/dev/null
+		fi
+
+	# mouse is in the top left corner -- potentially activate xscreensaver right now
+	elif [[ ${X} -eq $((max_x - max_x)) && ${Y} -eq $((max_y - max_y)) ]]; then
+
+		# sleep a bit and then check mouse coordinates again
+		sleep 5
+		eval $(xdotool getmouselocation --shell)
+
+		# mouse is still in the top left corner -- we must really want to activate xscreensaver
+		if [[ ${X} -eq $((max_x - max_x)) && ${Y} -eq $((max_y - max_y)) ]]; then
+
+			# make sure xscreensaver is actually running
+			if pidof xscreensaver &>/dev/null; then
+
+				# make sure it hasn't already activated
+				if ! xscreensaver-command -time | grep -q 'screen blanked since'; then
+
+					# activate it!
+					xscreensaver-command -activate &>/dev/null
+
+				fi
+
+			fi
+
+		fi
+
+	# a Steam game is running
+	elif ps axfu | grep '/home/nipsy/.steam/debian-installation/steamapps/common' | grep -qv grep; then
+
+		# make sure xscreensaver is even running before telling it to stay idle
+		if pidof xscreensaver &>/dev/null; then
+			sleep 5
+			xscreensaver-command -deactivate &>/dev/null
+		fi
+
+	fi
+
+	# die off if we're no longer running on a connected Xorg screen any longer -- this should be the normal termination path for this script
+	if ! xdpyinfo &>/dev/null; then
+		rm ${PIDFILE}
+		exit 0
+	fi
+
+	# arbitrary sleep for script to avoid CPU sucking infinite loop
+	sleep 5
+
+done
+
+# exit with error since we should never get here
+exit 1