sxhkd: Don't hardcode top_padding for polybar

Since launch.sh calculates all the bar values for us (as well as bspwm
settings), we can simply store the top_padding value in the user's cache
directory, then reference that number within sxhkd.

This way, if the top_padding value is changed through launch.sh, editing
sxhkdrc manually isn't needed, and the config file doesn't need to be
reloaded.

.config/polybar/launch.sh

@@ -43,6 +43,9 @@ offset-y                    = ${POLYBAR_OFFSET_XY:-0}
 border-size                 = ${POLYBAR_BORDER_SIZE:-0}
 EOL
 
+# Save the top_padding amount for use by other scripts
+echo $BSPWM_TOP_PADDING > $HOME/.cache/polybar/bspwm_top_padding
+
 # Wait until there are no more polybar instances running
 while pgrep -u $UID -x polybar >/dev/null; do sleep 1; done
 

.config/sxhkd/sxhkdrc

@@ -21,7 +21,7 @@ super + {_,shift} + backslash
 super + o
   (xdotool search --class --onlyvisible "Polybar" && \
     (xdo hide -N "Polybar" && bspc config top_padding 0)) || \
-    (xdo show -N "Polybar" && bspc config top_padding 80)
+    (xdo show -N "Polybar" && bspc config top_padding $(cat ~/.cache/polybar/bspwm_top_padding))
 
 # Change the wal color scheme
 alt + m