sxhkd: Add dzen2 script

This was a script I used to show the workspace number without having to
worry about having a bar in bspwm.

sxhkd/.config/sxhkd/dzen2.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+# Display brief desktop name notification at the center of the screen.
+#
+# Based on u/xircon's solution here:
+# https://old.reddit.com/r/bspwm/comments/lhvtw7/osd_notifications_on_changing_desktop/
+
+# Kill any old instances of dzen2 to prevent overlapping of notifications
+pkill -x dzen2
+
+# Display Variables:
+hgt=128 # font size
+wid=$((hgt*2)) # e.g. 3.5 times the height, will display the words 'Three' &  'Seven' correctly.
+time=1
+font="-*-Noto Sans CJK JP-bold-r-*-*-"$hgt"-*-*-*-*-*-*-*"
+
+# Screen Resolution calculations:
+full_res=$(cut -d " " -f 1  <<< $(xrandr | grep '*' | xargs)) # xargs removes leading spaces
+res_wid="${full_res%%x*}" # Left of 'x' in 1600x900
+res_hgt="${full_res##*x}"  # Right of 'x'
+
+# Do some calculations for x & y coordinates:
+x=$((a=res_wid-wid, xx=a/2))
+y=$((b=res_hgt-hgt-2, yy=b/2))
+
+Deskname=$(bspc query -D -d focused --names)
+
+# Display desktop number in the center of the screen:
+echo "$Deskname" | dzen2 -bg "#000000" -w $wid -x $x -y $y -p $time -fn "$font"