Function: server--on-display-p
server--on-display-p is a byte-compiled function defined in
server.el.gz.
Signature
(server--on-display-p FRAME DISPLAY)
Source Code
;; Defined in /usr/src/emacs/lisp/server.el.gz
(defun server--on-display-p (frame display)
(and (equal (frame-parameter frame 'display) display)
;; Note: TTY frames still get a `display' parameter set to the value of
;; $DISPLAY. This is useful when running from that tty frame
;; sub-processes that want to connect to the X server, but that means we
;; have to be careful here not to be tricked into thinking those frames
;; are on `display'.
(not (eq (framep frame) t))))