* Crude implementation of focus: use the current region to switch to the desired window.

- The proper way to do this would be to switch focus to the target client's region but GNU Screen offers no obvious way to do that.

- Remove screen region after client is closed.

- Assumed: Kak server runs in screen.

rc/base/screen.kak

@@ -1,9 +1,9 @@
 # http://gnu.org/software/screen/
 # ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
  
-hook global KakBegin .* %{
+hook -group GNUscreen global KakBegin .* %{
     %sh{
-        [ -z "${kak_client_env_STY}" ] && exit
+        [ -z "${STY}" ] && exit
         echo "
             alias global focus screen-focus
             alias global new screen-new-vertical
@@ -15,14 +15,24 @@ hook global KakBegin .* %{
 define-command screen-new-vertical -params .. -command-completion -docstring "Create a new vertical region" %{
      %sh{
         tty="$(ps -o tty ${kak_client_pid} | tail -n 1)"
-        screen -X eval 'split -h' 'focus down' "screen kak -c \"${kak_session}\" -e \"$*\"" < "/dev/$tty"
+        screen -X eval \
+            'split -h' \
+            'focus down' \
+            "screen sh -c 'kak -c \"${kak_session}\" -e \"$*\" ;
+                screen -X remove'" \
+        < "/dev/$tty"
     }
 }
 
 define-command screen-new-horizontal -params .. -command-completion -docstring "Create a new horizontal region" %{
      %sh{
         tty="$(ps -o tty ${kak_client_pid} | tail -n 1)"
-        screen -X eval 'split -v' 'focus right' "screen kak -c \"${kak_session}\" -e \"$*\"" < "/dev/$tty"
+        screen -X eval \
+            'split -v' \
+            'focus right' \
+            "screen sh -c 'kak -c \"${kak_session}\" -e \"$*\" ;
+                screen -X remove'" \
+        < "/dev/$tty"
     }
 }
 
@@ -39,11 +49,10 @@ If no client is passed then the current one is used} \
     screen-focus %{ %sh{
         if [ $# -eq 1 ]; then
             printf %s\\n "
-                evaluate-commands -client '$1' %{ %sh{
-                    screen -X focus
-            }}"
+                evaluate-commands -client '$1' focus
+                "
         elif [ -n "${kak_client_env_STY}" ]; then
             tty="$(ps -o tty ${kak_client_pid} | tail -n 1)"
-            screen -X select "$kak_client_env_WINDOW" < "/dev/$tty"
+            screen -X select "${kak_client_env_WINDOW}" < "/dev/$tty"
         fi
 } }