client.kak: add a focus command for focusing a certain client.

rc/client.kak

@@ -6,8 +6,25 @@ decl str termcmd %sh{
     fi
 }
 
-def new -docstring 'create a new kak client for current session' \
-        -shell-params %{ nop %sh{
+def -docstring 'create a new kak client for current session' \
+    -shell-params \
+    new %{ nop %sh{
     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{
+    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
+    fi
+} }