Here is what I finally ended up with to allow completion with tag
expressions. I did not figure out how to avoid overwriting an
org-contacts function. I thought I could find the right hooks to use,
but I could not figure it out. It is only a one line modification to the
org-contacts function. This works for tag expressions, but I have not
gotten it to work with properties.
(defun org-contacts-complete-tags (start end tag-expression)
"insert emails from org-contacts that match the tags expression. For example:
group-phd will match entries tagged with group but not with phd."
(let* ((completion-ignore-case org-contacts-completion-ignore-case)
(group-completion-p t))
(let ((result (mapconcat 'identity
(loop for contact in (org-contacts-db)
for contact-name = (car contact)
for email = (org-contacts-strip-link (car
(org-contacts-split-property
(or
(cdr
(assoc-string org-contacts-email-property
(caddr contact)))
""))))
for tags = (cdr (assoc "TAGS" (nth 2 contact)))
for tags-list = (if tags
(split-string (substring (cdr
(assoc "TAGS" (nth 2 contact))) 1 -1) ":")
'())
if (let ((todo-only nil))
(eval (cdr (org-make-tags-matcher
tag-expression))))
collect (org-contacts-format-email contact-name
email))
",")))
(when (not (string= "" result))
;; return (start end function)
(lexical-let* ((to-return result))
(list start end
(lambda (string pred &optional to-ignore) to-return)))))))
this is the function I overwrote in my init files:
(defun org-contacts-message-complete-function (&optional start)
"Function used in `completion-at-point-functions' in `message-mode'."
;; Avoid to complete in `post-command-hook'.
(when completion-in-region-mode
(remove-hook 'post-command-hook #'completion-in-region--postch))
(let ((mail-abbrev-mode-regexp
"^\\(Resent-To\\|To\\|B?Cc\\|Reply-To\\|From\\|Mail-Followup-To\\|Mail-Copies-To\\|Disposition-Notification-To\\|Return-Receipt-To\\):"))
(when (mail-abbrev-in-expansion-header-p)
(lexical-let*
((end (point))
(start (or start
(save-excursion
(re-search-backward "\\(\\`\\|[\n:,]\\)[ \t]*")
(goto-char (match-end 0))
(point))))
(string (buffer-substring start end)))
(or
;; I added the next line
(org-contacts-complete-tags start end string)
(org-contacts-complete-group start end string)
(org-contacts-complete-name start end string))))))
--
-----------------------------------
John Kitchin
Professor
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
http://kitchingroup.cheme.cmu.edu
