Display red dots during completion process (disabled by default)

lib/completion.zsh

@@ -59,3 +59,12 @@ zstyle ':completion:*:*:*:users' ignored-patterns \
 # ... unless we really want to.
 zstyle '*' single-ignored show
 
+if [ "x$COMPLETION_WAITING_DOTS" = "xtrue" ]; then
+  expand-or-complete-with-dots() {
+    echo -n "\e[31m......\e[0m"
+    zle expand-or-complete
+    zle redisplay
+  }
+  zle -N expand-or-complete-with-dots
+  bindkey "^I" expand-or-complete-with-dots
+fi