[request] more stuff using 'unseen' marks.

[request] more stuff using 'unseen' marks.

[Maciej Matysiak]

hi,

if someone is bored enough to write some lisp, i'd like to see in gnus few
new functions/variables which would make movements in (and manipulations of)
summaries/groups/topics easier (by analogy to 'unread' stuff):

gnus-group-group-unseen
  Function: Get the number of unseen articles of the newsgroup on the current
   line.
gnus-group-sort-by-unseen
  Function: Sort by number of unseen articles.
gnus-group-sort-groups-by-unseen
  Command: Sort the group buffer by number of unseen articles.
gnus-group-sort-selected-groups-by-unseen
  Command: Sort the group buffer by number of unseen articles.
gnus-group-topic-unseen
  Function: The number of unseen articles in topic on the current line.
gnus-group-unseen
  Macro: Get the currently computed number of unseen articles in GROUP.
gnus-summary-first-unseen-article
  Command: Select the first unseen article.
gnus-summary-goto-unseen
  User Option: *If t, many commands will go to the next unseen article.
gnus-summary-limit-to-unseen
  Command: Limit the summary buffer to articles that are not marked as read.
gnus-summary-next-unseen-article
  Command: Select unseen article after current one.
gnus-summary-next-unseen-same-subject
  Command: Select next unseen article which has the same subject as current
   one.
gnus-summary-next-unseen-subject
  Command: Go to next N'th unseen summary line.
gnus-summary-prev-unseen-article
  Command: Select unseen article before current one.
gnus-summary-prev-unseen-same-subject
  Command: Select previous unseen article which has the same subject as
   current one.
gnus-summary-prev-unseen-subject
  Command: Go to previous N'th unseen summary line.
gnus-topic-sort-groups-by-unseen
  Command: Sort the current topic by number of unseen articles.
gnus-topic-unseen
  Function: Return the number of unseen articles in TOPIC.

in particular, i'd like to be able to move to next unseen article (in thread
mode they are not too easy accessible), have the number of unseen messages
in gnus-group-line-format, and sort my groups by number of unseen mail.

m-x apropos unseen shows only six matches, while apropos for unread gives
a lot of useful commands/variables, which would make sense as well for
unseen articles, i think.

any volunteers? :)

 m.m. (i'm sorry if that doesn't make sense at all.)
-- 
 use gnus not guns!