diff options
Diffstat (limited to 'lisp/gnus/message.el')
| -rw-r--r-- | lisp/gnus/message.el | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/lisp/gnus/message.el b/lisp/gnus/message.el index 18088423eb0..42911ce0648 100644 --- a/lisp/gnus/message.el +++ b/lisp/gnus/message.el @@ -3292,11 +3292,33 @@ or in the synonym headers, defined by `message-header-synonyms'." (defun message-insert-newsgroups () "Insert the Newsgroups header from the article being replied to." (interactive) - (when (and (message-position-on-field "Newsgroups") - (mail-fetch-field "newsgroups") - (not (string-match "\\` *\\'" (mail-fetch-field "newsgroups")))) - (insert ",")) - (insert (or (message-fetch-reply-field "newsgroups") ""))) + (let ((old-newsgroups (mail-fetch-field "newsgroups")) + (new-newsgroups (message-fetch-reply-field "newsgroups")) + (first t) + insert-newsgroups) + (message-position-on-field "Newsgroups") + (cond + ((not new-newsgroups) + (error "No Newsgroups to insert")) + ((not old-newsgroups) + (insert new-newsgroups)) + (t + (setq new-newsgroups (split-string new-newsgroups "[, ]+") + old-newsgroups (split-string old-newsgroups "[, ]+")) + (dolist (group new-newsgroups) + (unless (member group old-newsgroups) + (push group insert-newsgroups))) + (if (null insert-newsgroups) + (error "Newgroup%s already in the header" + (if (> (length new-newsgroups) 1) + "s" "")) + (when old-newsgroups + (setq first nil)) + (dolist (group insert-newsgroups) + (unless first + (insert ",")) + (setq first nil) + (insert group))))))) |