Re: Is there a better (built-in) way to insert an org link with title as description?

[Arthur Miller]

Ihor Radchenko <yantar92@posteo.net> writes:

> Arthur Miller <arthur.miller@live.com> writes:
>
>> I want to auto insert a title from an HTML page as description for an org 
>> link in
>> my notes. I stumbled upon some old message by Miro Bezjak on this list:
>>
>> https://lists.gnu.org/archive/html/emacs-orgmode/2012-09/msg01435.html
>>
>> I have seen the replies, but I am not sure how to use
>> org-make-link-description-function
>
> Since that time, Org got a capability to set description function
> per link type. Just use
>
> (org-link-set-parameters "http" :insert-description #'your-function)
> (org-link-set-parameters "https" :insert-description #'your-function)

Thanks, after some thinkering I got it:

#+begin_src emacs-lisp
(defun my-org-insert-link ()
  "Insert org link where default description is set to html title."
  (interactive)
  (let* ((url (or (current-kill 0) (read-string "URL: "))))
    (org-insert-link nil url)))

(defun org-desc-from-clipboard (url _desc)
  "Insert an org link into current buffer from an URL in clipboard."
  (with-current-buffer (url-retrieve-synchronously url t)
    (goto-char (point-min))
    (let ((title "<title>\\(.*\\)\\(/>\\|</title>\\)"))
      (if (re-search-forward title nil t)
          (string-trim (match-string-no-properties 1))
        url))))

(org-link-set-parameters "http" :insert-description #'org-desc-from-clipboard)
(org-link-set-parameters "https" :insert-description #'org-desc-from-clipboard)
#+end_src

And I can do it async too, *but*; this will affect all insertions of links,
right?

I am not sure if it is safe/possible always to access the internet or do
it asynchronously, so I'll abandon the ship and revert to home-cooked one just
for the precautios measures:

#+begin_src emacs-lisp
(defun org-link-from-clipboard ()
  "Insert an org link into current buffer from an URL in clipboard."
  (interactive)
  (let ((marker (point-marker))
        (url (or (current-kill 0) (read-string "URL: "))))
    (url-retrieve
     url
     (lambda (_status title)
       (goto-char (point-min))
       (when (re-search-forward title nil t)
         (setq title (string-trim (match-string-no-properties 1))))
       (with-current-buffer (marker-buffer marker)
         (save-excursion
           (goto-char (marker-position marker))
           (org-insert-link
            nil url (or title url)))))
     '("<title>\\(.*\\)\\(/>\\|</title>\\)") t t)))
#end_src

But it was a bit of learning, thanks for pointing me in the right direction.