Re: Find tick state from gnus-article-prepare-hook?

[Steinar Bang <sb@dod.no>]

>>>>> Steinar Bang <sb@dod.no>:

> I tried using gnus-mark-article-hook instead, since this hook is
> called from the summary buffer, in what seems to be the appropriate
> moment.

> But with the code below, I am asked if I wish to save the diary
> entry on an unread article.  But the article is never marked read.

The reason this happens, is that when I do 
 (add-hook 'gnus-mark-article-hook  'my-gnus-check-outlook)
I overwrite the original value of `gnus-mark-article-hook', which is
`(gnus-summary-mark-read-and-unread-as-read)'.  This is not what I
expected when calling add-hook.  I would expect my new function to be
added to the hook.

I think defcustom's handling of hook variables, is wrong.  At least
the way it's done in XEmacs 21.4.

In any case, the below code works for me, for using code in u-appt.el
to scan unread articles in Gnus, for Outlook invitations.

Though I should probably find a less fragile hook, one where the
current mark setting doesn't depend on the position in the hook list.

Here's the code:

(defun my-gnus-check-outlook ()
  "Run from a hook to check new messages in Gnus for Outlook appointment 
invitations, and offer to save them in the diary."
  (save-excursion
    (let ((mark (gnus-summary-article-mark)))
      (when (gnus-unread-mark-p mark)
	(set-buffer gnus-article-buffer)
	(u-appt-check-outlook)))))

; Check for Outlook invitations in unread messages
(add-hook 'gnus-mark-article-hook 'my-gnus-check-outlook)
; Add the original value of gnus-mark-article-hook, since this 
; is overwritten by the above add-hook.
; Add it at the end, since it sets the mark to read.
(add-hook 'gnus-mark-article-hook 'gnus-summary-mark-read-and-unread-as-read t)