Fix my last change.

[gnus] / lisp / gnus-bcklg.el

diff --git a/lisp/gnus-bcklg.el b/lisp/gnus-bcklg.el
index d3f2ac5..5a9cbf6 100644 (file)
--- a/lisp/gnus-bcklg.el
+++ b/lisp/gnus-bcklg.el
@@ -1,7 +1,7 @@
 ;;; gnus-bcklg.el --- backlog functions for Gnus
-;; Copyright (C) 1996,97 Free Software Foundation, Inc.
+;; Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
 
-;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;; Keywords: news
 
 ;; This file is part of GNU Emacs.
@@ -41,10 +41,9 @@
   "Return the backlog buffer."
   (or (get-buffer gnus-backlog-buffer)
       (save-excursion
-       (set-buffer (get-buffer-create gnus-backlog-buffer))
-       (buffer-disable-undo (current-buffer))
+       (set-buffer (gnus-get-buffer-create gnus-backlog-buffer))
+       (buffer-disable-undo)
        (setq buffer-read-only t)
-       (gnus-add-current-to-buffer-list)
        (get-buffer gnus-backlog-buffer))))
 
 (defun gnus-backlog-setup ()
@@ -83,7 +82,9 @@
          (setq b (point))
          (insert-buffer-substring buffer)
          ;; Tag the beginning of the article with the ident.
-         (gnus-put-text-property b (1+ b) 'gnus-backlog ident))))))
+         (if (> (point-max) b)
+             (gnus-put-text-property b (1+ b) 'gnus-backlog ident)
+           (gnus-error 3 "Article %d is blank" number)))))))
 
 (defun gnus-backlog-remove-oldest-article ()
   (save-excursion
@@ -125,7 +126,7 @@
              t))
          (setq gnus-backlog-articles (delq ident gnus-backlog-articles)))))))
 
-(defun gnus-backlog-request-article (group number buffer)
+(defun gnus-backlog-request-article (group number &optional buffer)
   (when (numberp number)
     (gnus-backlog-setup)
     (let ((ident (intern (concat group ":" (int-to-string number))
@@ -145,10 +146,12 @@
            (setq end
                  (next-single-property-change
                   (1+ beg) 'gnus-backlog (current-buffer) (point-max)))))
-       (let ((buffer-read-only nil))
-         (erase-buffer)
-         (insert-buffer-substring gnus-backlog-buffer beg end)
-         t)))))
+       (save-excursion
+         (and buffer (set-buffer buffer))
+         (let ((buffer-read-only nil))
+           (erase-buffer)
+           (insert-buffer-substring gnus-backlog-buffer beg end)))
+       t))))
 
 (provide 'gnus-bcklg)