(setq doom-theme 'doom-gruvbox)

(defun posframe-poshandler-window-top-center-offset (info)
  "Posframe's position handler.

Get a position which let posframe stay onto current window's
top center.  The structure of INFO can be found in docstring of
`posframe-show'."
  (let* ((window-left (plist-get info :parent-window-left))
         (window-top (plist-get info :parent-window-top))
         (window-width (plist-get info :parent-window-width))
         (posframe-width (plist-get info :posframe-width)))
    (cons (+ window-left (/ (- window-width posframe-width) 2))
          (+ window-top 48))))