bspwm: Add dropdown.sh

This commit makes it possible to toggle any terminal you want with
super + backslash. If the terminal doesn't exist already, it will
be created for you.

bspwm/.config/sxhkd/dropdown.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+# New Start: A modern Arch workflow built with an emphasis on functionality.
+# Copyright (C) 2018 Donovan Glover
+
+c='URxvt'         # Class
+i='dropdown'      # Instance
+x='urxvtc -name'  # Executable
+
+# Note: This solution will not work with termite since it registers two ids.
+# See https://github.com/thestinger/termite/issues/634 for more information.
+
+id=$(xdo id -n $i)
+
+bspc rule -r $c:$i
+bspc rule -a $c:$i sticky=on state=floating rectangle=3400x1200+220+200
+
+([ -z "$id" ]) && ($x $i) ||
+  ([[ $(xprop -id "$id" | awk '/window state: / {print $3}') == 'Withdrawn' ]] &&
+    xdo show -n $i || xdo hide -n $i)

bspwm/.config/sxhkd/sxhkdrc

@@ -13,6 +13,10 @@ super + p
 super + {_,shift} + Return
   {termite -e "tmux new-session; set status",urxvtc}
 
+# Toggle a dropdown terminal
+super + backslash
+  ~/.config/sxhkd/dropdown.sh
+
 # toggle polybar: top_padding depends on the height you set in polybar/config
 super + o
   (xdotool search --class --onlyvisible "Polybar" && \