Simplify Gnus buffer liveness checking and killing

* lisp/gnus/gnus-agent.el (gnus-agent-synchronize-group-flags):
Fix indentation.
* lisp/gnus/gnus-util.el (gnus-buffer-exists-p): Define as obsolete
alias of gnus-buffer-live-p.
(gnus-buffer-live-p): If the given argument is or names a live
buffer, return the corresponding buffer object instead of a boolean.
* lisp/gnus/gnus-win.el (gnus-delete-windows-in-gnusey-frames)
(gnus-remove-some-windows): Simplify.
* lisp/gnus/gnus.el (gnus-prune-buffers): Redefine as alias of
gnus-buffers.
(gnus-kill-buffer, gnus-buffers, gnus-group-find-parameter):
* lisp/gnus/gnus-art.el (gnus-kill-sticky-article-buffers)
(gnus-request-article-this-buffer):
* lisp/gnus/gnus-bcklg.el (gnus-backlog-shutdown):
* lisp/gnus/gnus-cus.el (gnus-group-customize)
(gnus-agent-customize-category):
* lisp/gnus/gnus-draft.el (gnus-draft-edit-message):
* lisp/gnus/gnus-group.el (gnus-group-set-mode-line)
(gnus--abort-on-unsaved-message-buffers, gnus-group-compact-group):
* lisp/gnus/gnus-msg.el (gnus-inews-add-send-actions)
(gnus-summary-supersede-article, gnus-copy-article-buffer):
* lisp/gnus/gnus-score.el (gnus-score-edit-current-scores)
(gnus-score-edit-file):
* lisp/gnus/gnus-spec.el (gnus-update-format-specifications):
* lisp/gnus/gnus-srvr.el (gnus-server-compact-server):
* lisp/gnus/gnus-start.el (gnus-clear-system, gnus-dribble-enter)
(gnus-dribble-save, gnus-dribble-clear, gnus-save-newsrc-file):
* lisp/gnus/gnus-sum.el (gnus-summary-setup-buffer)
(gnus-update-summary-mark-positions, gnus-summary-exit)
(gnus-deaden-summary, gnus-kill-or-deaden-summary)
(gnus-summary-next-group):
* lisp/gnus/gnus-win.el (gnus-configure-frame):
* lisp/gnus/mail-source.el (mail-source-movemail):
* lisp/gnus/message.el (message-with-reply-buffer)
(message-with-reply, message-send-and-exit)
(message-send-mail-with-sendmail, message-pop-to-buffer)
(message-do-send-housekeeping, message-forward-make-body-plain)
(message-forward-make-body-mml):
* lisp/gnus/mm-decode.el (mm-display-external, mm-remove-part):
* lisp/gnus/nnbabyl.el (nnbabyl-server-opened)
(nnbabyl-possibly-change-newsgroup, nnbabyl-read-mbox)
(nnbabyl-check-mbox):
* lisp/gnus/nndiary.el (nndiary-save-nov):
* lisp/gnus/nndoc.el (nndoc-close-group)
(nndoc-possibly-change-buffer):
* lisp/gnus/nnfolder.el (nnfolder-close-group, nnfolder-save-nov):
* lisp/gnus/nnimap.el (nnimap-make-process-buffer, nnimap-keepalive)
(nnimap-find-connection):
* lisp/gnus/nnmail.el (nnmail-cache-open, nnmail-cache-close):
* lisp/gnus/nnmbox.el (nnmbox-close-server, nnmbox-server-opened)
(nnmbox-possibly-change-newsgroup, nnmbox-read-mbox):
* lisp/gnus/nnml.el (nnml-save-incremental-nov, nnml-open-nov)
(nnml-save-nov):
* lisp/gnus/nnoo.el (nnoo-server-opened):
* lisp/gnus/nntp.el (nntp-kill-buffer, nntp-make-process-buffer)
(nntp-open-connection, nntp-async-trigger):
* lisp/net/mairix.el (mairix-gnus-fetch-field): Simplify buffer
liveness checking and killing, replacing buffer-name with
buffer-live-p and gnus-buffer-exists-p with gnus-buffer-live-p or
equivalent where applicable.

1 files changed, 5 insertions, 10 deletions

diff --git a/lisp/gnus/nnmbox.el b/lisp/gnus/nnmbox.el
index bba41336dd9..110f39a867f 100644
--- a/lisp/gnus/nnmbox.el
+++ b/lisp/gnus/nnmbox.el
@@ -131,18 +131,15 @@
     t)))
 
 (deffoo nnmbox-close-server (&optional server)
-  (when (and nnmbox-mbox-buffer
-	     (buffer-name nnmbox-mbox-buffer))
+  (when (buffer-live-p nnmbox-mbox-buffer)
     (kill-buffer nnmbox-mbox-buffer))
   (nnoo-close-server 'nnmbox server)
   t)
 
 (deffoo nnmbox-server-opened (&optional server)
   (and (nnoo-current-server-p 'nnmbox server)
-       nnmbox-mbox-buffer
-       (buffer-name nnmbox-mbox-buffer)
-       nntp-server-buffer
-       (buffer-name nntp-server-buffer)))
+       (buffer-live-p nnmbox-mbox-buffer)
+       (buffer-live-p nntp-server-buffer)))
 
 (deffoo nnmbox-request-article (article &optional newsgroup server buffer)
   (nnmbox-possibly-change-newsgroup newsgroup server)
@@ -463,8 +460,7 @@
   (when (and server
 	     (not (nnmbox-server-opened server)))
     (nnmbox-open-server server))
-  (when (or (not nnmbox-mbox-buffer)
-	    (not (buffer-name nnmbox-mbox-buffer)))
+  (unless (buffer-live-p nnmbox-mbox-buffer)
     (nnmbox-read-mbox))
   (when (not nnmbox-group-alist)
     (nnmail-activate 'nnmbox))
@@ -622,8 +618,7 @@
 (defun nnmbox-read-mbox ()
   (nnmail-activate 'nnmbox)
   (nnmbox-create-mbox)
-  (if (and nnmbox-mbox-buffer
-	   (buffer-name nnmbox-mbox-buffer)
+  (if (and (buffer-live-p nnmbox-mbox-buffer)
 	   (with-current-buffer nnmbox-mbox-buffer
 	     (= (buffer-size) (nnheader-file-size nnmbox-mbox-file))))
       ()