+2002-01-05 Lars Magne Ingebrigtsen <larsi@gnus.org>
+
+ * gnus-sum.el (gnus-thread-highest-number): New function.
+ (gnus-thread-sort-by-most-recent-thread): New function.
+ (gnus-thread-sort-functions): Doc fix.
+
2002-01-04 ShengHuo ZHU <zsh@cs.rochester.edu>
* gnus-sum.el (gnus-summary-select-article): Disable multibyte in
Ready-made functions include `gnus-thread-sort-by-number',
`gnus-thread-sort-by-author', `gnus-thread-sort-by-subject',
-`gnus-thread-sort-by-date', `gnus-thread-sort-by-score' and
+`gnus-thread-sort-by-date', `gnus-thread-sort-by-score',
+`gnus-thread-sort-by-most-recent-thread' and
`gnus-thread-sort-by-total-score' (see `gnus-thread-score-function').
When threading is turned off, the variable
(defun gnus-thread-total-score (thread)
;; This function find the total score of THREAD.
- (cond ((null thread)
- 0)
- ((consp thread)
- (if (stringp (car thread))
- (apply gnus-thread-score-function 0
- (mapcar 'gnus-thread-total-score-1 (cdr thread)))
- (gnus-thread-total-score-1 thread)))
- (t
- (gnus-thread-total-score-1 (list thread)))))
+ (cond
+ ((null thread)
+ 0)
+ ((consp thread)
+ (if (stringp (car thread))
+ (apply gnus-thread-score-function 0
+ (mapcar 'gnus-thread-total-score-1 (cdr thread)))
+ (gnus-thread-total-score-1 thread)))
+ (t
+ (gnus-thread-total-score-1 (list thread)))))
+
+(defun gnus-thread-sort-by-most-recent-thread (h1 h2)
+ "Sort threads such that the thread with the most recently arrived article is comes first."
+ (> (gnus-thread-highest-number h1) (gnus-thread-highest-number h2)))
+
+(defun gnus-thread-highest-number (thread)
+ "Return the highest article number from THREAD."
+ (apply 'max (mapcar (lambda (header)
+ (mail-header-number header))
+ (message-flatten-list thread))))
(defun gnus-thread-total-score-1 (root)
;; This function find the total score of the thread below ROOT.