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, 6 insertions, 8 deletions

diff --git a/lisp/gnus/gnus-util.el b/lisp/gnus/gnus-util.el
index e4bc9b900c2..31421cc7555 100644
--- a/lisp/gnus/gnus-util.el
+++ b/lisp/gnus/gnus-util.el
@@ -109,12 +109,6 @@ This is a compatibility function for different Emacsen."
 (defsubst gnus-goto-char (point)
   (and point (goto-char point)))
 
-(defmacro gnus-buffer-exists-p (buffer)
-  `(let ((buffer ,buffer))
-     (when buffer
-       (funcall (if (stringp buffer) 'get-buffer 'buffer-name)
-		buffer))))
-
 (defun gnus-delete-first (elt list)
   "Delete by side effect the first occurrence of ELT as a member of LIST."
   (if (equal (car list) elt)
@@ -562,8 +556,12 @@ If N, return the Nth ancestor instead."
 	  (match-string 1 references))))))
 
 (defsubst gnus-buffer-live-p (buffer)
-  "Say whether BUFFER is alive or not."
-  (and buffer (buffer-live-p (get-buffer buffer))))
+  "If BUFFER names a live buffer, return its object; else nil."
+  (and buffer (buffer-live-p (setq buffer (get-buffer buffer)))
+       buffer))
+
+(define-obsolete-function-alias 'gnus-buffer-exists-p
+  'gnus-buffer-live-p "27.1")
 
 (defun gnus-horizontal-recenter ()
   "Recenter the current buffer horizontally."