Using popper independently per frame

[ashlineldridge]

Hi, I'm seeing some odd behavior that is preventing me from being able to reliably toggle popper across frames using popper-toggle (without the workaround below).

If I hop between frames and run M-x popper-toggle then popper will, as expected, toggle the popup window for the current frame. However, if I bind popper-toggle to a keybinding then I don't get the same results. I suspect that by switching frame and invoking a keybinding (rather than M-x popper-toggle) that popper--update-popups is not called and so popper-open-popup-alist is not updated.

As a workaround, I've added the following to my config to ensure the popper-open-popup-alist is up to date prior to toggling:

(advice-add #'popper-toggle :before (lambda (&rest _) (popper--update-popups)))

This line stood out to me as a potential cause for this behavior as select-frame-hook does not exist for me (currently on Emacs 30):

(add-hook 'select-frame-hook #'popper--update-popups)

[karthink]

This line stood out to me as a potential cause for this behavior as select-frame-hook does not exist for me (currently on Emacs 30):

Huh, it looks like select-frame-hook is gone from Emacs 29.3 as well. There's no direct replacement, it looks like after-focus-change-function is the closest but this is pretty complex, it's not a hook.

[ashlineldridge]

When I did a quick search, it seemed that select-frame-hook was an XEmacs thing. I couldn't see any evidence of it existing in Emacs. This comment seems to back that up.

[jaihindhreddy]

I'm quite new to Emacs Lisp, but I seem to have hit the same problem. I'm trying to customize popper-display-function to make the pop-ups show up in a floating posframe. I found the "POP" in the mode-line in the posframe upon running popper-toggle, but running it again spawns a nested posframe instead of closing the already open pop-up. This seems to be because popper-open-popup-alist is not updated.

FWIW here's the display function I'm using (It's most probably very broken):

(defun my-popper-display-buffer-in-posframe (buf &optional alist)
  "Display BUFFER in a posframe. ALIST is ignored."
  (posframe-show buf
                 :poshandler #'posframe-poshandler-frame-center
                 :width (floor (* (frame-width) 0.8))
                 :height (floor (* (frame-height) 0.8))
                 :internal-border-width 1
                 :internal-border-color "gray50"
                 :accept-focus t
                 :cursor 'bar
                 :respect-mode-line t)
  (with-current-buffer buf
    (setq-local popper-popup-status 'popup)
    ;; Return window for popper's reference
    (let* ((win (frame-selected-window (buffer-local-value 'posframe--frame buf))))
      (select-window win)
      win)))

[karthink]

I'm quite new to Emacs Lisp, but I seem to have hit the same problem. I'm trying to customize `popper-display-function` to make the pop-ups show up in a floating posframe. I found the "POP" in the mode-line in the posframe upon running `popper-toggle`, but running it again spawns a nested posframe instead of closing the already open pop-up. This seems to be because `popper-open-popup-alist` is not updated.

Using popper with childframes is tricky. It used to work, but I haven't tried in a couple of years. I think you need to find an appropriate hook in which to run popper--update-popups -- I'm not sure which hook that should be. Your display function looks fine at first glance.