org-mode links become invisible about polymode

[yoshinari-nomura]

I have the same problem with Polymode 20230317.1218 and Emacs 29.2.50.

Invoke emacs with -q option, and eval below:

(add-to-list 'load-path "~/.emacs.d/versions/29.2/elpa/polymode-20230317.1218")

(require 'polymode)

(define-innermode poly-org-innermode
  :mode 'org-mode
  :head-matcher "^[*]+ .*"
  :tail-matcher "^[^ \n\t*#]\\|\\'"
  :head-mode 'body
  :tail-mode 'host)

(define-hostmode poly-fundamental-hostmode
  :mode 'fundamental-mode)

(define-polymode poly-fundamental-mode
  :hostmode 'poly-fundamental-hostmode
  :innermodes '(poly-org-innermode))

Then creat a buffer with fundamental-mode．
Yank this text:

* 2024-01-29
  [[https://github.com/polymode/polymode][polymode]] is awesome!

M-x poly-fundamental-mode becomes:

* 2024-01-29
   is awesome!

link looks invisible. If you cut and paste the invisible text to another buffer,
polymode becomes awesome again 😄

[borwickatuw]

FYI that works for me!

  (advice-add 'poly-org-mode
	      :before
	      (lambda () (setq buffer-invisibility-spec
		    (with-temp-buffer
		      (org-mode)
		      buffer-invisibility-spec))))

I'm sure there is a better way to do this, e.g. to figure out what's going on with buffer-invisibility-spec, but this works! Thank you @yoshinari-nomura !

[yoshinari-nomura]

I found that org-mode uses buffer-invisibility-spec to control the appearance of invisible text. Polymode introduces buffer-invisibility-spec from host into inner.

I think host needs to setup buffer-invisibility-spec as that of org-mode.

Eval below before M-x poly-fundamental-mode in host buffer works for me.

(setq buffer-invisibility-spec
      (with-temp-buffer
        (org-mode)
        buffer-invisibility-spec))