Update rc/client.kak to fit the tmux changes

Trim the script to remove any reference to tmux, and reflect the changes
made in the previous commit.

rc/client.kak

@@ -1,50 +1,44 @@
 # termcmd should be set such as the next argument is the whole
 # command line to execute
 decl str termcmd %sh{
-    if [ -n "$TMUX" ]; then
-        echo "'tmux split-window -h'"
-    else
-        for termcmd in 'termite        -e      ' \
-                       'urxvt          -e sh -c' \
-                       'rxvt           -e sh -c' \
-                       'xterm          -e sh -c' \
-                       'roxterm        -e sh -c' \
-                       'mintty         -e sh -c' \
-                       'gnome-terminal -e      ' \
-                       'xfce4-terminal -e      ' ; do
-            terminal=${termcmd%% *}
-            if which $terminal > /dev/null 2>&1; then
-                echo "'$termcmd'"
-                exit
-            fi
-        done
-    fi
+    for termcmd in 'termite        -e      ' \
+                   'urxvt          -e sh -c' \
+                   'rxvt           -e sh -c' \
+                   'xterm          -e sh -c' \
+                   'roxterm        -e sh -c' \
+                   'mintty         -e sh -c' \
+                   'gnome-terminal -e      ' \
+                   'xfce4-terminal -e      ' ; do
+        terminal=${termcmd%% *}
+        if which $terminal > /dev/null 2>&1; then
+            echo "'$termcmd'"
+            exit
+        fi
+    done
 }
 
 def -docstring 'create a new kak client for current session' \
     -shell-params \
     -command-completion \
     new %{ %sh{
-            if [ -z "${kak_opt_termcmd}" ]; then
-               echo "echo -color Error 'termcmd option is not set'"
-               exit
-            fi
-            if [ $# -ne 0 ]; then kakoune_params="-e '$@'"; fi
-            setsid ${kak_opt_termcmd} "kak -c ${kak_session} ${kakoune_params}" < /dev/null > /dev/null 2>&1 &
+        if [ -z "${kak_opt_termcmd}" ]; then
+           echo "echo -color Error 'termcmd option is not set'"
+           exit
+        fi
+        if [ $# -ne 0 ]; then kakoune_params="-e '$@'"; fi
+        setsid ${kak_opt_termcmd} "kak -c ${kak_session} ${kakoune_params}" < /dev/null > /dev/null 2>&1 &
 }}
 
 def -docstring 'focus given client' \
     -shell-params -client-completion \
-    focus %{ %sh{
+    focus-default %{ %sh{
     if [ $# -gt 1 ]; then
         echo "echo -color Error 'too many arguments, use focus [client]'"
     elif [ $# -eq 1 ]; then
         echo "eval -client '$1' focus"
     else
-        if [ -n "$kak_client_env_TMUX" ]; then
-            TMUX="$kak_client_env_TMUX" tmux select-pane -t "$kak_client_env_TMUX_PANE" > /dev/null
-        else
-            xdotool windowactivate $kak_client_env_WINDOWID > /dev/null
-        fi
+        xdotool windowactivate $kak_client_env_WINDOWID > /dev/null
     fi
 } }
+## Create an alias to the default focus callback to allow overriding from custom scripts (i.e. tmux)
+alias global focus focus-default