#+BEGIN_SRC emacs-lisp
(org-link-set-parameters
"red"
:follow (lambda (path) (message "You clicked me."))
:export (lambda (path desc backend)
(cond
((eq 'html backend)
(format "<font color=\"red\">%s</font>"
(or desc path)))))
:face '(:foreground "red")
:help-echo "Click me for a message.")
#+END_SRC
#+RESULTS:
should make this link -> red:test
have a red face with a tooltip, but it is just a blue org-link face with the standard tooltip. The follow and export function seems to work, but not the face and help-echo.
I think this is related to the consolidation of org-activate-links. In the properties section it incorrectly uses code like: (org-link-get-parameter type :face) where type is defined as plain/bracket/... etc. That code should be replaced with this, which gets the link-type from (link-type (org-element-property :type link-object)) and replaces type with link-type.
This is around line 5982 in org.el
(let* ((link-object (save-excursion
(goto-char start)
(save-match-data (org-element-link-parser))))
(link (org-element-property :raw-link link-object))
(link-type (org-element-property :type link-object))
(path (org-element-property :path link-object))
(properties ;for link's visible part
(list
'face (pcase (org-link-get-parameter link-type :face)
((and (pred functionp) face) (funcall face path))
((and (pred facep) face) face)
((and (pred consp) face) face) ;anonymous
(_ 'org-link))
'mouse-face (or (org-link-get-parameter link-type :mouse-face)
'highlight)
'keymap (or (org-link-get-parameter link-type :keymap)
org-mouse-map)
'help-echo (pcase (org-link-get-parameter link-type :help-echo)
((and (pred stringp) echo) echo)
((and (pred functionp) echo) echo)
(_ (concat "LINK: " link)))
'htmlize-link (pcase (org-link-get-parameter link-type
:htmlize-link)
((and (pred functionp) f) (funcall f))
(_ `(:uri ,link)))
'font-lock-multiline t)))
John
-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803