(gnus-summary-delete-article): Don't alter the registry on failed delete.
[gnus] / lisp / gnus-sum.el
index b9e9a74..5e90bd9 100644 (file)
@@ -25,7 +25,7 @@
 
 ;;; Code:
 
-;; For Emacs < 22.2.
+;; For Emacs <22.2 and XEmacs.
 (eval-and-compile
   (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
 (eval-when-compile
@@ -451,8 +451,10 @@ and non-`vertical', do both horizontal and vertical recentering."
                 (integer :tag "height")
                 (sexp :menu-tag "both" t)))
 
-(defvar gnus-auto-center-group t
-  "*If non-nil, always center the group buffer.")
+(defcustom gnus-auto-center-group t
+  "If non-nil, always center the group buffer."
+  :group 'gnus-summary-maneuvering
+  :type 'boolean)
 
 (defcustom gnus-show-all-headers nil
   "*If non-nil, don't hide any headers."
@@ -472,6 +474,12 @@ If nil, each group will get its own article buffer."
   :group 'gnus-article-various
   :type 'boolean)
 
+(defcustom gnus-widen-article-window nil
+  "If non-nil, selecting the article buffer will display only the article buffer."
+  :version "24.1"
+  :group 'gnus-article-various
+  :type 'boolean)
+
 (defcustom gnus-break-pages t
   "*If non-nil, do page breaking on articles.
 The page delimiter is specified by the `gnus-page-delimiter'
@@ -1302,6 +1310,7 @@ the normal Gnus MIME machinery."
 (defvar gnus-article-decoded-p nil)
 (defvar gnus-article-charset nil)
 (defvar gnus-article-ignored-charsets nil)
+(defvar gnus-article-original-subject nil)
 (defvar gnus-scores-exclude-files nil)
 (defvar gnus-page-broken nil)
 
@@ -1327,6 +1336,7 @@ the normal Gnus MIME machinery."
 (defvar gnus-current-copy-group nil)
 (defvar gnus-current-crosspost-group nil)
 (defvar gnus-newsgroup-display nil)
+(defvar gnus-newsgroup-original-name nil)
 
 (defvar gnus-newsgroup-dependencies nil)
 (defvar gnus-newsgroup-adaptive nil)
@@ -1429,6 +1439,7 @@ the type of the variable (string, integer, character, etc).")
 (defvar gnus-newsgroup-last-directory nil)
 (defvar gnus-newsgroup-auto-expire nil)
 (defvar gnus-newsgroup-active nil)
+(defvar gnus-newsgroup-highest nil)
 
 (defvar gnus-newsgroup-data nil)
 (defvar gnus-newsgroup-data-reverse nil)
@@ -1580,6 +1591,7 @@ This list will always be a subset of gnus-newsgroup-undownloaded.")
     (gnus-summary-mark-below . global)
     (gnus-orphan-score . global)
     gnus-newsgroup-active gnus-scores-exclude-files
+    gnus-newsgroup-highest
     gnus-newsgroup-history gnus-newsgroup-ancient
     gnus-newsgroup-sparse gnus-newsgroup-process-stack
     (gnus-newsgroup-adaptive . gnus-use-adaptive-scoring)
@@ -1891,6 +1903,7 @@ increase the score of each group you read."
   "a" gnus-summary-post-news
   "x" gnus-summary-limit-to-unread
   "s" gnus-summary-isearch-article
+  [tab] gnus-summary-widget-forward
   "t" gnus-summary-toggle-header
   "g" gnus-summary-show-article
   "l" gnus-summary-goto-last-article
@@ -2047,11 +2060,14 @@ increase the score of each group you read."
   "e" gnus-summary-end-of-article
   "^" gnus-summary-refer-parent-article
   "r" gnus-summary-refer-parent-article
+  "C" gnus-summary-show-complete-article
   "D" gnus-summary-enter-digest-group
   "R" gnus-summary-refer-references
   "T" gnus-summary-refer-thread
+  "W" gnus-warp-to-article
   "g" gnus-summary-show-article
   "s" gnus-summary-isearch-article
+  [tab] gnus-summary-widget-forward
   "P" gnus-summary-print-article
   "S" gnus-sticky-article
   "M" gnus-mailing-list-insinuate
@@ -2084,6 +2100,7 @@ increase the score of each group you read."
   "a" gnus-article-strip-headers-in-body ;; mnemonic: wash archive
   "p" gnus-article-verify-x-pgp-sig
   "d" gnus-article-treat-dumbquotes
+  "U" gnus-article-treat-non-ascii
   "i" gnus-summary-idna-message)
 
 (gnus-define-keys (gnus-summary-wash-deuglify-map "Y" gnus-summary-wash-map)
@@ -2121,10 +2138,12 @@ increase the score of each group you read."
   "d" gnus-article-display-face
   "s" gnus-treat-smiley
   "D" gnus-article-remove-images
-  "W" gnus-html-show-images
+  "W" gnus-article-show-images
   "f" gnus-treat-from-picon
   "m" gnus-treat-mail-picon
-  "n" gnus-treat-newsgroups-picon)
+  "n" gnus-treat-newsgroups-picon
+  "g" gnus-treat-from-gravatar
+  "h" gnus-treat-mail-gravatar)
 
 (gnus-define-keys (gnus-summary-wash-mime-map "M" gnus-summary-wash-map)
   "w" gnus-article-decode-mime-words
@@ -2154,12 +2173,9 @@ increase the score of each group you read."
 
 (gnus-define-keys (gnus-summary-help-map "H" gnus-summary-mode-map)
   "v" gnus-version
-  "f" gnus-summary-fetch-faq
   "d" gnus-summary-describe-group
   "h" gnus-summary-describe-briefly
-  "i" gnus-info-find-node
-  "c" gnus-group-fetch-charter
-  "C" gnus-group-fetch-control)
+  "i" gnus-info-find-node)
 
 (gnus-define-keys (gnus-summary-backend-map "B" gnus-summary-mode-map)
   "e" gnus-summary-expire-articles
@@ -2374,6 +2390,8 @@ increase the score of each group you read."
              ["Show picons in From" gnus-treat-from-picon t]
              ["Show picons in mail headers" gnus-treat-mail-picon t]
              ["Show picons in news headers" gnus-treat-newsgroups-picon t]
+              ["Show Gravatars in From" gnus-treat-from-gravatar t]
+             ["Show Gravatars in mail headers" gnus-treat-mail-gravatar t]
              ("View as different encoding"
               ,@(gnus-summary-menu-split
                  (mapcar
@@ -2407,6 +2425,7 @@ gnus-summary-show-article-from-menu-as-charset-%s" cs))))
                gnus-article-remove-leading-whitespace t])
              ["Overstrike" gnus-article-treat-overstrike t]
              ["Dumb quotes" gnus-article-treat-dumbquotes t]
+             ["Non-ASCII" gnus-article-treat-non-ascii t]
              ["Emphasis" gnus-article-emphasize t]
              ["Word wrap" gnus-article-fill-cited-article t]
              ["Fill long lines" gnus-article-fill-long-lines t]
@@ -2733,14 +2752,7 @@ gnus-summary-show-article-from-menu-as-charset-%s" cs))))
         ["Randomize" gnus-summary-sort-by-random t]
         ["Original sort" gnus-summary-sort-by-original t])
        ("Help"
-        ["Fetch group FAQ" gnus-summary-fetch-faq t]
         ["Describe group" gnus-summary-describe-group t]
-        ["Fetch charter" gnus-group-fetch-charter
-         ,@(if (featurep 'xemacs) nil
-             '(:help "Display the charter of the current group"))]
-        ["Fetch control message" gnus-group-fetch-control
-         ,@(if (featurep 'xemacs) nil
-             '(:help "Display the archived control message for the current group"))]
         ["Read manual" gnus-info-find-node t])
        ("Modes"
         ["Pick and read" gnus-pick-mode t]
@@ -3106,16 +3118,6 @@ The following commands are available:
        ;; Simple nil-valued local variable.
        (set (make-local-variable local) nil)))))
 
-(defun gnus-summary-clear-local-variables ()
-  (let ((locals gnus-summary-local-variables))
-    (while locals
-      (if (consp (car locals))
-         (and (symbolp (caar locals))
-              (set (caar locals) nil))
-       (and (symbolp (car locals))
-            (set (car locals) nil)))
-      (setq locals (cdr locals)))))
-
 ;; Summary data functions.
 
 (defmacro gnus-data-number (data)
@@ -3500,8 +3502,6 @@ display only a single character."
       ;; Fix by Sudish Joseph <joseph@cis.ohio-state.edu>
       (setq gnus-summary-buffer (set-buffer (gnus-get-buffer-create buffer)))
       (gnus-summary-mode group)
-      (when gnus-carpal
-       (gnus-carpal-setup-buffer 'summary))
       (when (gnus-group-quit-config group)
        (set (make-local-variable 'gnus-single-article-buffer) nil))
       (make-local-variable 'gnus-article-buffer)
@@ -3844,7 +3844,8 @@ This function is intended to be used in
 
 (defun gnus-summary-set-local-parameters (group)
   "Go through the local params of GROUP and set all variable specs in that list."
-  (let ((vars '(quit-config)))          ; Ignore quit-config.
+  (let ((vars '(quit-config active)))  ; Ignore things that aren't
+                                       ; really variables.
     (dolist (elem (gnus-group-find-parameter group))
       (and (consp elem)                        ; Has to be a cons.
           (consp (cdr elem))           ; The cdr has to be a list.
@@ -3956,6 +3957,7 @@ If NO-DISPLAY, don't generate a summary buffer."
       (setq gnus-newsgroup-active
            (gnus-copy-sequence
             (gnus-active gnus-newsgroup-name)))
+      (setq gnus-newsgroup-highest (cdr gnus-newsgroup-active))
       ;; You can change the summary buffer in some way with this hook.
       (gnus-run-hooks 'gnus-select-group-hook)
       (when (memq 'summary (gnus-update-format-specifications
@@ -4511,7 +4513,7 @@ the id of the parent article (if any)."
        (while (not (eobp))
          (ignore-errors
            (setq article (read (current-buffer))
-                 header (gnus-nov-parse-line article dependencies)))
+                 header (gnus-nov-parse-line article dependencies t)))
          (when header
            (with-current-buffer gnus-summary-buffer
              (push header gnus-newsgroup-headers)
@@ -4987,6 +4989,10 @@ Unscored articles will be counted as having a score of zero."
    (t
     (gnus-thread-total-score-1 (list thread)))))
 
+(defun gnus-article-sort-by-most-recent-number (h1 h2)
+  "Sort articles by number."
+  (gnus-article-sort-by-number h1 h2))
+
 (defun gnus-thread-sort-by-most-recent-number (h1 h2)
   "Sort threads such that the thread with the most recently arrived article comes first."
   (> (gnus-thread-highest-number h1) (gnus-thread-highest-number h2)))
@@ -4997,6 +5003,10 @@ Unscored articles will be counted as having a score of zero."
                        (mail-header-number header))
                      (message-flatten-list thread))))
 
+(defun gnus-article-sort-by-most-recent-date (h1 h2)
+  "Sort articles by number."
+  (gnus-article-sort-by-date h1 h2))
+
 (defun gnus-thread-sort-by-most-recent-date (h1 h2)
   "Sort threads such that the thread with the most recently dated article comes first."
   (> (gnus-thread-latest-date h1) (gnus-thread-latest-date h2)))
@@ -5465,7 +5475,7 @@ or a straight list of headers."
                          (substring subject (match-end 1)))))
          (mail-header-set-subject header subject))))))
 
-(defun gnus-fetch-headers (articles)
+(defun gnus-fetch-headers (articles &optional limit force-new dependencies)
   "Fetch headers of ARTICLES."
   (let ((name (gnus-group-decoded-name gnus-newsgroup-name)))
     (gnus-message 5 "Fetching headers for %s..." name)
@@ -5474,16 +5484,17 @@ or a straight list of headers."
                (setq gnus-headers-retrieved-by
                      (gnus-retrieve-headers
                       articles gnus-newsgroup-name
-                      ;; We might want to fetch old headers, but
-                      ;; not if there is only 1 article.
-                      (and (or (and
-                                (not (eq gnus-fetch-old-headers 'some))
-                                (not (numberp gnus-fetch-old-headers)))
-                               (> (length articles) 1))
-                           gnus-fetch-old-headers))))
+                      (or limit
+                          ;; We might want to fetch old headers, but
+                          ;; not if there is only 1 article.
+                          (and (or (and
+                                    (not (eq gnus-fetch-old-headers 'some))
+                                    (not (numberp gnus-fetch-old-headers)))
+                                   (> (length articles) 1))
+                               gnus-fetch-old-headers)))))
            (gnus-get-newsgroup-headers-xover
-            articles nil nil gnus-newsgroup-name t)
-         (gnus-get-newsgroup-headers))
+            articles force-new dependencies gnus-newsgroup-name t)
+         (gnus-get-newsgroup-headers dependencies force-new))
       (gnus-message 5 "Fetching headers for %s...done" name))))
 
 (defun gnus-select-newsgroup (group &optional read-all select-articles)
@@ -5676,17 +5687,17 @@ If SELECT-ARTICLES, only select those articles from GROUP."
                            (unseen . unseen))
                          gnus-article-mark-lists))
       (push (cons (cdr elem)
-                 (gnus-byte-compile
+                 (gnus-byte-compile    ;Why bother?
                   `(lambda () (gnus-article-marked-p ',(cdr elem)))))
            gnus-summary-display-cache)))
   (let ((gnus-category-predicate-alist gnus-summary-display-cache)
        (gnus-category-predicate-cache gnus-summary-display-cache))
     (gnus-get-predicate display)))
 
-;; Uses the dynamically bound `number' variable.
-(defvar number)
+;; Uses the dynamically bound `gnus-number' variable.
+(defvar gnus-number)
 (defun gnus-article-marked-p (type &optional article)
-  (let ((article (or article number)))
+  (let ((article (or article gnus-number)))
     (cond
      ((eq type 'tick)
       (memq article gnus-newsgroup-marked))
@@ -6183,7 +6194,13 @@ The resulting hash table is returned, or nil if no Xrefs were found."
         (info (nth 2 entry))
         (active (gnus-active group))
         range)
-    (when entry
+    (if (not entry)
+       ;; Group that Gnus doesn't know exists, but still allow the
+       ;; backend to set marks.
+       (gnus-request-set-mark
+        group (list (list (gnus-compress-sequence (sort articles #'<))
+                          'add '(read))))
+      ;; Normal, subscribed groups.
       (setq range (gnus-compute-read-articles group articles))
       (with-current-buffer gnus-group-buffer
        (gnus-undo-register
@@ -6218,8 +6235,6 @@ The resulting hash table is returned, or nil if no Xrefs were found."
        (unless (gnus-ephemeral-group-p group)
          (gnus-group-update-group group t))))))
 
-(defvar gnus-newsgroup-none-id 0)
-
 (defun gnus-get-newsgroup-headers (&optional dependencies force-new)
   (let ((cur nntp-server-buffer)
        (dependencies
@@ -6937,11 +6952,19 @@ displayed, no centering will be performed."
 ;; Various summary commands
 
 (defun gnus-summary-select-article-buffer ()
-  "Reconfigure windows to show article buffer."
+  "Reconfigure windows to show the article buffer.
+If `gnus-widen-article-buffer' is set, show only the article
+buffer."
   (interactive)
   (if (not (gnus-buffer-live-p gnus-article-buffer))
       (error "There is no article buffer for this summary buffer")
-    (gnus-configure-windows 'article)
+    (unless (get-buffer-window gnus-article-buffer)
+      (gnus-summary-show-article))
+    (gnus-configure-windows
+     (if gnus-widen-article-window
+        'only-article
+       'article)
+     t)
     (select-window (get-buffer-window gnus-article-buffer))))
 
 (defun gnus-summary-universal-argument (arg)
@@ -7014,7 +7037,11 @@ The prefix argument ALL means to select all articles."
 (defun gnus-summary-rescan-group (&optional all)
   "Exit the newsgroup, ask for new articles, and select the newsgroup."
   (interactive "P")
-  (gnus-summary-reselect-current-group all t))
+  (let ((config gnus-current-window-configuration))
+    (gnus-summary-reselect-current-group all t)
+    (gnus-configure-windows config)
+    (when (eq config 'article)
+      (gnus-summary-select-article))))
 
 (defun gnus-summary-update-info (&optional non-destructive)
   (save-excursion
@@ -7091,15 +7118,6 @@ If FORCE (the prefix), also save the .newsrc file(s)."
       (when gnus-use-scoring
        (gnus-score-save)))
     (gnus-run-hooks 'gnus-summary-prepare-exit-hook)
-    ;; If we have several article buffers, we kill them at exit.
-    (unless gnus-single-article-buffer
-      (when (gnus-buffer-live-p gnus-article-buffer)
-       (with-current-buffer gnus-article-buffer
-         ;; Don't kill sticky article buffers
-         (unless (eq major-mode 'gnus-sticky-article-mode)
-           (gnus-kill-buffer gnus-article-buffer)
-           (setq gnus-article-current nil))))
-      (gnus-kill-buffer gnus-original-article-buffer))
     (when gnus-use-cache
       (gnus-cache-possibly-remove-articles)
       (gnus-cache-save-buffers))
@@ -7136,18 +7154,22 @@ If FORCE (the prefix), also save the .newsrc file(s)."
          (progn
            (gnus-deaden-summary)
            (setq mode nil))
-       ;; We set all buffer-local variables to nil.  It is unclear why
-       ;; this is needed, but if we don't, buffer-local variables are
-       ;; not garbage-collected, it seems.  This would the lead to en
-       ;; ever-growing Emacs.
-       (gnus-summary-clear-local-variables)
-       (let ((gnus-summary-local-variables gnus-newsgroup-variables))
-         (gnus-summary-clear-local-variables))
        (when (get-buffer gnus-article-buffer)
          (bury-buffer gnus-article-buffer))
        ;; Return to group mode buffer.
        (when (eq mode 'gnus-summary-mode)
          (gnus-kill-buffer buf)))
+
+      ;; If we have several article buffers, we kill them at exit.
+      (unless gnus-single-article-buffer
+       (when (gnus-buffer-live-p gnus-article-buffer)
+         (with-current-buffer gnus-article-buffer
+           ;; Don't kill sticky article buffers
+           (unless (eq major-mode 'gnus-sticky-article-mode)
+             (gnus-kill-buffer gnus-article-buffer)
+             (setq gnus-article-current nil))))
+       (gnus-kill-buffer gnus-original-article-buffer))
+
       (setq gnus-current-select-method gnus-select-method)
       (set-buffer gnus-group-buffer)
       (if quit-config
@@ -7190,9 +7212,6 @@ If FORCE (the prefix), also save the .newsrc file(s)."
       (if (not gnus-kill-summary-on-exit)
          (gnus-deaden-summary)
        (gnus-close-group group)
-       (gnus-summary-clear-local-variables)
-       (let ((gnus-summary-local-variables gnus-newsgroup-variables))
-         (gnus-summary-clear-local-variables))
        (gnus-kill-buffer gnus-summary-buffer))
       (unless gnus-single-article-buffer
        (setq gnus-article-current nil))
@@ -7324,23 +7343,6 @@ The state which existed when entering the ephemeral is reset."
        t)))
   (gnus-message 3 "This dead summary is now alive again"))
 
-;; Suggested by Andrew Eskilsson <pi92ae@pt.hk-r.se>.
-(defun gnus-summary-fetch-faq (&optional faq-dir)
-  "Fetch the FAQ for the current group.
-If FAQ-DIR (the prefix), prompt for a directory to search for the faq
-in."
-  (interactive
-   (list
-    (when current-prefix-arg
-      (completing-read
-       "FAQ dir: " (and (listp gnus-group-faq-directory)
-                       (mapcar 'list
-                               gnus-group-faq-directory))))))
-  (let (gnus-faq-buffer)
-    (when (setq gnus-faq-buffer
-               (gnus-group-fetch-faq gnus-newsgroup-name faq-dir))
-      (gnus-configure-windows 'summary-faq))))
-
 ;; Suggested by Per Abrahamsen <amanda@iesd.auc.dk>.
 (defun gnus-summary-describe-group (&optional force)
   "Describe the current newsgroup."
@@ -7598,9 +7600,11 @@ be displayed."
                       (null (get-buffer gnus-article-buffer))
                       (not (eq article (cdr gnus-article-current)))
                       (not (equal (car gnus-article-current)
-                                  gnus-newsgroup-name))))
+                                  gnus-newsgroup-name))
+                      (not (get-buffer gnus-original-article-buffer))))
              (and (not gnus-single-article-buffer)
                   (or (null gnus-current-article)
+                      (not (get-buffer gnus-original-article-buffer))
                       (not (eq gnus-current-article article))))
              force)
          ;; The requested article is different from the current article.
@@ -7857,7 +7861,8 @@ If at the beginning of the article, go to the next article."
 
 (defun gnus-summary-scroll-up (lines)
   "Scroll up (or down) one line current article.
-Argument LINES specifies lines to be scrolled up (or down if negative)."
+Argument LINES specifies lines to be scrolled up (or down if negative).
+If no article is selected, then the current article will be selected first."
   (interactive "p")
   (gnus-configure-windows 'article)
   (gnus-summary-show-thread)
@@ -7873,7 +7878,8 @@ Argument LINES specifies lines to be scrolled up (or down if negative)."
 
 (defun gnus-summary-scroll-down (lines)
   "Scroll down (or up) one line current article.
-Argument LINES specifies lines to be scrolled down (or up if negative)."
+Argument LINES specifies lines to be scrolled down (or up if negative).
+If no article is selected, then the current article will be selected first."
   (interactive "p")
   (gnus-summary-scroll-up (- lines)))
 
@@ -8012,10 +8018,9 @@ If FORCE, go to the article even if it isn't displayed.  If FORCE
 is a number, it is the line the article is to be displayed on."
   (interactive
    (list
-    (completing-read
-     "Article number or Message-ID: "
-     (mapcar (lambda (number) (list (int-to-string number)))
-            gnus-newsgroup-limit))
+    (gnus-completing-read
+     "Article number or Message-ID"
+     (mapcar 'int-to-string gnus-newsgroup-limit))
     current-prefix-arg
     t))
   (prog1
@@ -8269,16 +8274,13 @@ articles that are younger than AGE days."
   (interactive
    (let ((header
          (intern
-          (gnus-completing-read-with-default
-           (symbol-name (car gnus-extra-headers))
+          (gnus-completing-read
            (if current-prefix-arg
                "Exclude extra header"
              "Limit extra header")
-           (mapcar (lambda (x)
-                     (cons (symbol-name x) x))
-                   gnus-extra-headers)
-           nil
-           t))))
+           (mapcar 'symbol-name gnus-extra-headers)
+           t nil nil
+            (symbol-name (car gnus-extra-headers))))))
      (list header
           (read-string (format "%s header %s (regexp): "
                                (if current-prefix-arg "Exclude" "Limit to")
@@ -8300,16 +8302,12 @@ articles that are younger than AGE days."
   (unless gnus-newsgroup-display
     (error "There is no `display' group parameter"))
   (let (articles)
-    (dolist (number gnus-newsgroup-articles)
+    (dolist (gnus-number gnus-newsgroup-articles)
       (when (funcall gnus-newsgroup-display)
-       (push number articles)))
+       (push gnus-number articles)))
     (gnus-summary-limit articles))
   (gnus-summary-position-point))
 
-(defalias 'gnus-summary-delete-marked-as-read 'gnus-summary-limit-to-unread)
-(make-obsolete
- 'gnus-summary-delete-marked-as-read 'gnus-summary-limit-to-unread "Emacs 20.4")
-
 (defun gnus-summary-limit-to-unread (&optional all)
   "Limit the summary buffer to articles that are not marked as read.
 If ALL is non-nil, limit strictly to unread articles."
@@ -8400,10 +8398,6 @@ If UNREPLIED (the prefix), limit to unreplied articles."
     (gnus-summary-limit gnus-newsgroup-replied))
   (gnus-summary-position-point))
 
-(defalias 'gnus-summary-delete-marked-with 'gnus-summary-limit-exclude-marks)
-(make-obsolete 'gnus-summary-delete-marked-with
-              'gnus-summary-limit-exclude-marks "Emacs 20.4")
-
 (defun gnus-summary-limit-exclude-marks (marks &optional reverse)
   "Exclude articles that are marked with MARKS (e.g. \"DK\").
 If REVERSE, limit the summary buffer to articles that are marked
@@ -8459,7 +8453,11 @@ When called interactively, ID is the Message-ID of the current
 article."
   (interactive (list (mail-header-id (gnus-summary-article-header))))
   (let ((articles (gnus-articles-in-thread
-                  (gnus-id-to-thread (gnus-root-id id)))))
+                  (gnus-id-to-thread (gnus-root-id id))))
+       ;;we REALLY want the whole thread---this prevents cut-threads
+       ;;from removing the thread we want to include.
+       (gnus-fetch-old-headers nil)
+       (gnus-build-sparse-threads nil))
     (prog1
        (gnus-summary-limit (nconc articles gnus-newsgroup-limit))
       (gnus-summary-limit-include-matching-articles
@@ -8504,6 +8502,18 @@ fetched for this group."
       (gnus-summary-limit (append gnus-newsgroup-dormant gnus-newsgroup-limit))
     (gnus-summary-position-point)))
 
+(defun gnus-summary-include-articles (articles)
+  "Fetch the headers for ARTICLES and then display the summary lines."
+  (let ((gnus-inhibit-demon t)
+       (gnus-agent nil)
+       (gnus-read-all-available-headers t))
+    (setq gnus-newsgroup-headers
+         (gnus-merge
+          'list gnus-newsgroup-headers
+          (gnus-fetch-headers articles nil t)
+          'gnus-article-sort-by-number))
+    (gnus-summary-limit (append articles gnus-newsgroup-limit))))
+
 (defun gnus-summary-limit-exclude-dormant ()
   "Hide all dormant articles."
   (interactive)
@@ -8666,8 +8676,7 @@ fetch-old-headers verbiage, and so on."
                   (null gnus-summary-expunge-below)
                   (not (eq gnus-build-sparse-threads 'some))
                   (not (eq gnus-build-sparse-threads 'more))
-                  (null gnus-thread-expunge-below)
-                  (not gnus-use-nocem)))
+                  (null gnus-thread-expunge-below)))
     (push gnus-newsgroup-limit gnus-newsgroup-limits)
     (setq gnus-newsgroup-limit nil)
     (mapatoms
@@ -8704,8 +8713,8 @@ fetch-old-headers verbiage, and so on."
               (apply '+ (mapcar 'gnus-summary-limit-children
                                 (cdr thread)))
             0))
-         (number (mail-header-number (car thread)))
-         score)
+          (number (mail-header-number (car thread)))
+          score)
       (if (and
           (not (memq number gnus-newsgroup-marked))
           (or
@@ -8750,14 +8759,8 @@ fetch-old-headers verbiage, and so on."
              t)
            ;; Do the `display' group parameter.
            (and gnus-newsgroup-display
-                (not (funcall gnus-newsgroup-display)))
-           ;; Check NoCeM things.
-           (when (and gnus-use-nocem
-                      (gnus-nocem-unwanted-article-p
-                       (mail-header-id (car thread))))
-             (setq gnus-newsgroup-unreads
-                   (delq number gnus-newsgroup-unreads))
-             t)))
+                (let ((gnus-number number))
+                  (not (funcall gnus-newsgroup-display))))))
          ;; Nope, invisible article.
          0
        ;; Ok, this article is to be visible, so we add it to the limit
@@ -8847,31 +8850,44 @@ Return the number of articles fetched."
 
 (defun gnus-summary-refer-thread (&optional limit)
   "Fetch all articles in the current thread.
-If LIMIT (the numerical prefix), fetch that many old headers instead
-of what's specified by the `gnus-refer-thread-limit' variable."
+If no backend-specific 'request-thread function is available
+fetch LIMIT (the numerical prefix) old headers. If LIMIT is nil
+fetch what's specified by the `gnus-refer-thread-limit'
+variable."
   (interactive "P")
+  (gnus-warp-to-article)
   (let ((id (mail-header-id (gnus-summary-article-header)))
+       (gnus-inhibit-demon t)
+       (gnus-agent nil)
+       (gnus-summary-ignore-duplicates t)
+       (gnus-read-all-available-headers t)
        (limit (if limit (prefix-numeric-value limit)
                 gnus-refer-thread-limit)))
-    (unless (eq gnus-fetch-old-headers 'invisible)
-      (gnus-message 5 "Fetching headers for %s..." gnus-newsgroup-name)
-      ;; Retrieve the headers and read them in.
-      (if (eq (if (numberp limit)
-                 (gnus-retrieve-headers
-                  (list (min
-                         (+ (mail-header-number
-                             (gnus-summary-article-header))
-                            limit)
-                         gnus-newsgroup-end))
-                  gnus-newsgroup-name (* limit 2))
-               ;; gnus-refer-thread-limit is t, i.e. fetch _all_
-               ;; headers.
-               (gnus-retrieve-headers (list gnus-newsgroup-end)
-                                      gnus-newsgroup-name limit))
-             'nov)
-         (gnus-build-all-threads)
-       (error "Can't fetch thread from back ends that don't support NOV"))
-      (gnus-message 5 "Fetching headers for %s...done" gnus-newsgroup-name))
+    (setq gnus-newsgroup-headers
+         (gnus-merge
+          'list gnus-newsgroup-headers
+          (if (gnus-check-backend-function
+               'request-thread gnus-newsgroup-name)
+              (gnus-request-thread id)
+            (let* ((last (if (numberp limit)
+                             (min (+ (mail-header-number
+                                      (gnus-summary-article-header))
+                                     limit)
+                                  gnus-newsgroup-highest)
+                           gnus-newsgroup-highest))
+                   (subject (gnus-simplify-subject
+                             (mail-header-subject
+                              (gnus-summary-article-header))))
+                   (refs (split-string (or (mail-header-references
+                                            (gnus-summary-article-header))
+                                           "")))
+                   (gnus-parse-headers-hook
+                    (lambda () (goto-char (point-min))
+                      (keep-lines
+                       (regexp-opt (append refs (list id subject)))))))
+              (gnus-fetch-headers (list last) (if (numberp limit)
+                                                  (* 2 limit) limit) t)))
+          'gnus-article-sort-by-number))
     (gnus-summary-limit-include-thread id)))
 
 (defun gnus-summary-refer-article (message-id)
@@ -9068,6 +9084,15 @@ Obeys the standard process/prefix convention."
      (t
       (error "Couldn't select virtual nndoc group")))))
 
+(defun gnus-summary-widget-forward (arg)
+  "Move point to the next field or button in the article.
+With optional ARG, move across that many fields."
+  (interactive "p")
+  (gnus-summary-select-article)
+  (gnus-configure-windows 'article)
+  (select-window (gnus-get-buffer-window gnus-article-buffer))
+  (widget-forward arg))
+
 (defun gnus-summary-isearch-article (&optional regexp-p)
   "Do incremental search forward on the current article.
 If REGEXP-P (the prefix) is non-nil, do regexp isearch."
@@ -9255,14 +9280,14 @@ If HEADER is an empty string (or nil), the match is done on the entire
 article.  If BACKWARD (the prefix) is non-nil, search backward instead."
   (interactive
    (list (let ((completion-ignore-case t))
-          (completing-read
-           "Header name"
-           (mapcar (lambda (header) (list (format "%s" header)))
+          (gnus-completing-read
+           "Header name"
+           (mapcar 'symbol-name
                    (append
-                    '("Number" "Subject" "From" "Lines" "Date"
-                      "Message-ID" "Xref" "References" "Body")
+                    '(Number Subject From Lines Date
+                      Message-ID Xref References Body)
                     gnus-extra-headers))
-           nil 'require-match))
+           'require-match))
         (read-string "Regexp: ")
         (read-key-sequence "Command: ")
         current-prefix-arg))
@@ -9342,50 +9367,58 @@ to save in."
   (ps-despool filename))
 
 (defun gnus-print-buffer ()
-  (let ((buffer (generate-new-buffer " *print*")))
+  (let ((ps-left-header
+        (list
+         (concat "("
+                 (gnus-summary-print-truncate-and-quote
+                  (mail-header-subject gnus-current-headers)
+                  66) ")")
+         (concat "("
+                 (gnus-summary-print-truncate-and-quote
+                  (mail-header-from gnus-current-headers)
+                  45) ")")))
+       (ps-right-header
+        (list
+         "/pagenumberstring load"
+         (concat "("
+                 (mail-header-date gnus-current-headers) ")"))))
+    (gnus-run-hooks 'gnus-ps-print-hook)
+    (save-excursion
+      (if ps-print-color-p
+         (ps-spool-buffer-with-faces)
+       (ps-spool-buffer)))))
+
+(defun gnus-summary-show-complete-article ()
+  "Show a complete version of the current article.
+This is only useful if you're looking at a partial version of the
+article currently."
+  (interactive)
+  (let ((gnus-keep-backlog nil)
+       (gnus-use-cache nil)
+       (gnus-agent nil)
+       (variable (intern
+                  (format "%s-fetch-partial-articles"
+                          (car (gnus-find-method-for-group
+                                gnus-newsgroup-name)))
+                  obarray))
+       old-val)
     (unwind-protect
        (progn
-         (copy-to-buffer buffer (point-min) (point-max))
-         (set-buffer buffer)
-         (gnus-remove-text-with-property 'gnus-decoration)
-         (when (gnus-visual-p 'article-highlight 'highlight)
-           ;; Copy-to-buffer doesn't copy overlay.  So redo
-           ;; highlight.
-           (let ((gnus-article-buffer buffer))
-             (gnus-article-highlight-citation t)
-             (gnus-article-highlight-signature)
-             (gnus-article-emphasize)
-             (gnus-article-delete-invisible-text)))
-         (let ((ps-left-header
-                (list
-                 (concat "("
-                         (gnus-summary-print-truncate-and-quote
-                          (mail-header-subject gnus-current-headers)
-                          66) ")")
-                 (concat "("
-                         (gnus-summary-print-truncate-and-quote
-                          (mail-header-from gnus-current-headers)
-                          45) ")")))
-               (ps-right-header
-                (list
-                 "/pagenumberstring load"
-                 (concat "("
-                         (mail-header-date gnus-current-headers) ")"))))
-           (gnus-run-hooks 'gnus-ps-print-hook)
-           (save-excursion
-             (if ps-print-color-p
-                 (ps-spool-buffer-with-faces)
-               (ps-spool-buffer)))))
-      (kill-buffer buffer))))
+         (setq old-val (symbol-value variable))
+         (set variable nil)
+         (gnus-flush-original-article-buffer)
+         (gnus-summary-show-article))
+      (set variable old-val))))
 
 (defun gnus-summary-show-article (&optional arg)
   "Force redisplaying of the current article.
 If ARG (the prefix) is a number, show the article with the charset
 defined in `gnus-summary-show-article-charset-alist', or the charset
 input.
-If ARG (the prefix) is non-nil and not a number, show the raw article
-without any article massaging functions being run.  Normally, the key
-strokes are `C-u g'."
+If ARG (the prefix) is non-nil and not a number, show the article,
+but without running any of the article treatment functions
+article.  Normally, the keystroke is `C-u g'.  When using `C-u
+C-u g', show the raw article."
   (interactive "P")
   (cond
    ((numberp arg)
@@ -9427,7 +9460,9 @@ strokes are `C-u g'."
    ((not arg)
     ;; Select the article the normal way.
     (gnus-summary-select-article nil 'force))
-   (t
+   ((or (equal arg '(16))
+       (eq arg t))
+    ;; C-u C-u g
     ;; We have to require this here to make sure that the following
     ;; dynamic binding isn't shadowed by autoloading.
     (require 'gnus-async)
@@ -9445,6 +9480,9 @@ strokes are `C-u g'."
          ;; Set it to nil for safety reason.
          (setq gnus-article-mime-handle-alist nil)
          (setq gnus-article-mime-handles nil)))
+      (gnus-summary-select-article nil 'force)))
+   (t
+    (let ((gnus-inhibit-article-treatments t))
       (gnus-summary-select-article nil 'force))))
   (gnus-summary-goto-subject gnus-current-article)
   (gnus-summary-position-point))
@@ -9690,195 +9728,213 @@ ACTION can be either `move' (the default), `crosspost' or `copy'."
                  articles)
     (while articles
       (setq article (pop articles))
-      (setq
-       art-group
-       (cond
-       ;; Move the article.
-       ((eq action 'move)
-        ;; Remove this article from future suppression.
-        (gnus-dup-unsuppress-article article)
-        (let* ((from-method (gnus-find-method-for-group
-                             gnus-newsgroup-name))
-               (to-method (or select-method
-                              (gnus-find-method-for-group to-newsgroup)))
-               (move-is-internal (gnus-server-equal from-method to-method)))
-          (gnus-request-move-article
-           article                     ; Article to move
-           gnus-newsgroup-name         ; From newsgroup
-           (nth 1 (gnus-find-method-for-group
-                   gnus-newsgroup-name)) ; Server
-           (list 'gnus-request-accept-article
-                 to-newsgroup (list 'quote select-method)
-                 (not articles) t)     ; Accept form
-           (not articles)              ; Only save nov last time
-           (and move-is-internal
-                to-newsgroup           ; Not respooling
-                (gnus-group-real-name to-newsgroup))))) ; Is this move internal?
-       ;; Copy the article.
-       ((eq action 'copy)
-        (with-current-buffer copy-buf
-          (when (gnus-request-article-this-buffer article gnus-newsgroup-name)
-            (save-restriction
-              (nnheader-narrow-to-headers)
-              (dolist (hdr gnus-copy-article-ignored-headers)
-                (message-remove-header hdr t)))
-            (gnus-request-accept-article
-             to-newsgroup select-method (not articles) t))))
-       ;; Crosspost the article.
-       ((eq action 'crosspost)
-        (let ((xref (message-tokenize-header
-                     (mail-header-xref (gnus-summary-article-header article))
-                     " ")))
-          (setq new-xref (concat (gnus-group-real-name gnus-newsgroup-name)
-                                 ":" (number-to-string article)))
-          (unless xref
-            (setq xref (list (system-name))))
-          (setq new-xref
-                (concat
-                 (mapconcat 'identity
-                            (delete "Xref:" (delete new-xref xref))
-                            " ")
-                 " " new-xref))
+      ;; Set any marks that may have changed in the summary buffer.
+      (when gnus-preserve-marks
+       (gnus-summary-push-marks-to-backend article))
+      (let ((gnus-newsgroup-original-name gnus-newsgroup-name)
+           (gnus-article-original-subject
+            (mail-header-subject
+             (gnus-data-header (assoc article (gnus-data-list nil))))))
+       (setq
+        art-group
+        (cond
+         ;; Move the article.
+         ((eq action 'move)
+          ;; Remove this article from future suppression.
+          (gnus-dup-unsuppress-article article)
+          (let* ((from-method (gnus-find-method-for-group
+                               gnus-newsgroup-name))
+                 (to-method (or select-method
+                                (gnus-find-method-for-group to-newsgroup)))
+                 (move-is-internal (gnus-server-equal from-method to-method)))
+            (gnus-request-move-article
+             article                   ; Article to move
+             gnus-newsgroup-name       ; From newsgroup
+             (nth 1 (gnus-find-method-for-group
+                     gnus-newsgroup-name)) ; Server
+             (list 'gnus-request-accept-article
+                   to-newsgroup (list 'quote select-method)
+                   (not articles) t)   ; Accept form
+             (not articles)            ; Only save nov last time
+             (and move-is-internal
+                  to-newsgroup         ; Not respooling
+                                       ; Is this move internal?
+                  (gnus-group-real-name to-newsgroup)))))
+         ;; Copy the article.
+         ((eq action 'copy)
           (with-current-buffer copy-buf
-            ;; First put the article in the destination group.
-            (gnus-request-article-this-buffer article gnus-newsgroup-name)
-            (when (consp (setq art-group
-                               (gnus-request-accept-article
-                                to-newsgroup select-method (not articles) t)))
-              (setq new-xref (concat new-xref " " (car art-group)
-                                     ":"
-                                     (number-to-string (cdr art-group))))
-              ;; Now we have the new Xrefs header, so we insert
-              ;; it and replace the new article.
-              (nnheader-replace-header "Xref" new-xref)
-              (gnus-request-replace-article
-               (cdr art-group) to-newsgroup (current-buffer) t)
-              art-group))))))
-      (cond
-       ((not art-group)
-       (gnus-message 1 "Couldn't %s article %s: %s"
-                     (cadr (assq action names)) article
-                     (nnheader-get-report (car to-method))))
-       ((eq art-group 'junk)
-       (when (eq action 'move)
-         (gnus-summary-mark-article article gnus-canceled-mark)
-         (gnus-message 4 "Deleted article %s" article)
-         ;; run the delete hook
-         (run-hook-with-args 'gnus-summary-article-delete-hook
-                             action
-                             (gnus-data-header
-                              (assoc article (gnus-data-list nil)))
-                             gnus-newsgroup-name nil
-                             select-method)))
-       (t
-       (let* ((pto-group (gnus-group-prefixed-name
-                          (car art-group) to-method))
-              (info (gnus-get-info pto-group))
-              (to-group (gnus-info-group info))
-              to-marks)
-         ;; Update the group that has been moved to.
-         (when (and info
-                    (memq action '(move copy)))
-           (unless (member to-group to-groups)
-             (push to-group to-groups))
-
-           (unless (memq article gnus-newsgroup-unreads)
-             (push 'read to-marks)
-             (gnus-info-set-read
-              info (gnus-add-to-range (gnus-info-read info)
-                                      (list (cdr art-group)))))
-
-           ;; See whether the article is to be put in the cache.
-           (let* ((expirable (gnus-group-auto-expirable-p to-group))
-                  (marks (if expirable
-                             gnus-article-mark-lists
-                           (delete '(expirable . expire)
-                                   (copy-sequence gnus-article-mark-lists))))
-                  (to-article (cdr art-group)))
-
-             ;; Enter the article into the cache in the new group,
-             ;; if that is required.
-             (when gnus-use-cache
-               (gnus-cache-possibly-enter-article
-                to-group to-article
-                (memq article gnus-newsgroup-marked)
-                (memq article gnus-newsgroup-dormant)
-                (memq article gnus-newsgroup-unreads)))
-
-             (when gnus-preserve-marks
-               ;; Copy any marks over to the new group.
-               (when (and (equal to-group gnus-newsgroup-name)
-                          (not (memq article gnus-newsgroup-unreads)))
-                 ;; Mark this article as read in this group.
-                 (push (cons to-article gnus-read-mark) gnus-newsgroup-reads)
-                 (setcdr (gnus-active to-group) to-article)
-                 (setcdr gnus-newsgroup-active to-article))
-
-               (while marks
-                 (when (eq (gnus-article-mark-to-type (cdar marks)) 'list)
-                   (when (memq article (symbol-value
-                                        (intern (format "gnus-newsgroup-%s"
-                                                        (caar marks)))))
-                     (push (cdar marks) to-marks)
-                     ;; If the other group is the same as this group,
-                     ;; then we have to add the mark to the list.
-                     (when (equal to-group gnus-newsgroup-name)
-                       (set (intern (format "gnus-newsgroup-%s" (caar marks)))
-                            (cons to-article
-                                  (symbol-value
-                                   (intern (format "gnus-newsgroup-%s"
-                                                   (caar marks)))))))
-                     ;; Copy the marks to other group.
-                     (gnus-add-marked-articles
-                      to-group (cdar marks) (list to-article) info)))
-                 (setq marks (cdr marks)))
-
-               (when (and expirable
-                          gnus-mark-copied-or-moved-articles-as-expirable
-                          (not (memq 'expire to-marks)))
-                 ;; Mark this article as expirable.
-                 (push 'expire to-marks)
-                 (when (equal to-group gnus-newsgroup-name)
-                   (push to-article gnus-newsgroup-expirable))
-                 ;; Copy the expirable mark to other group.
-                 (gnus-add-marked-articles
-                  to-group 'expire (list to-article) info))
-
-               (when to-marks
-                 (gnus-request-set-mark
-                  to-group (list (list (list to-article) 'add to-marks)))))
-
-             (gnus-dribble-enter
-              (concat "(gnus-group-set-info '"
-                      (gnus-prin1-to-string (gnus-get-info to-group))
-                      ")"))))
-
-         ;; Update the Xref header in this article to point to
-         ;; the new crossposted article we have just created.
-         (when (eq action 'crosspost)
-           (with-current-buffer copy-buf
-             (gnus-request-article-this-buffer article gnus-newsgroup-name)
-             (nnheader-replace-header "Xref" new-xref)
-             (gnus-request-replace-article
-              article gnus-newsgroup-name (current-buffer) t)))
-
-         ;; run the move/copy/crosspost/respool hook
-         (run-hook-with-args 'gnus-summary-article-move-hook
-                             action
-                             (gnus-data-header
-                              (assoc article (gnus-data-list nil)))
-                             gnus-newsgroup-name
-                             to-newsgroup
-                             select-method))
-
-       ;;;!!!Why is this necessary?
-       (set-buffer gnus-summary-buffer)
-
-       (when (eq action 'move)
-         (save-excursion
-           (gnus-summary-goto-subject article)
-           (gnus-summary-mark-article article gnus-canceled-mark)))))
-      (push article articles-to-update-marks))
+            (when (gnus-request-article-this-buffer article
+                                                    gnus-newsgroup-name)
+              (save-restriction
+                (nnheader-narrow-to-headers)
+                (dolist (hdr gnus-copy-article-ignored-headers)
+                  (message-remove-header hdr t)))
+              (gnus-request-accept-article
+               to-newsgroup select-method (not articles) t))))
+         ;; Crosspost the article.
+         ((eq action 'crosspost)
+          (let ((xref (message-tokenize-header
+                       (mail-header-xref (gnus-summary-article-header
+                                          article))
+                       " ")))
+            (setq new-xref (concat (gnus-group-real-name gnus-newsgroup-name)
+                                   ":" (number-to-string article)))
+            (unless xref
+              (setq xref (list (system-name))))
+            (setq new-xref
+                  (concat
+                   (mapconcat 'identity
+                              (delete "Xref:" (delete new-xref xref))
+                              " ")
+                   " " new-xref))
+            (with-current-buffer copy-buf
+              ;; First put the article in the destination group.
+              (gnus-request-article-this-buffer article gnus-newsgroup-name)
+              (when (consp (setq art-group
+                                 (gnus-request-accept-article
+                                  to-newsgroup select-method (not articles)
+                                  t)))
+                (setq new-xref (concat new-xref " " (car art-group)
+                                       ":"
+                                       (number-to-string (cdr art-group))))
+                ;; Now we have the new Xrefs header, so we insert
+                ;; it and replace the new article.
+                (nnheader-replace-header "Xref" new-xref)
+                (gnus-request-replace-article
+                 (cdr art-group) to-newsgroup (current-buffer) t)
+                art-group))))))
+       (cond
+        ((not art-group)
+         (gnus-message 1 "Couldn't %s article %s: %s"
+                       (cadr (assq action names)) article
+                       (nnheader-get-report (car to-method))))
+        ((eq art-group 'junk)
+         (when (eq action 'move)
+           (gnus-summary-mark-article article gnus-canceled-mark)
+           (gnus-message 4 "Deleted article %s" article)
+           ;; run the delete hook
+           (run-hook-with-args 'gnus-summary-article-delete-hook
+                               action
+                               (gnus-data-header
+                                (assoc article (gnus-data-list nil)))
+                               gnus-newsgroup-original-name nil
+                               select-method)))
+        (t
+         (let* ((pto-group (gnus-group-prefixed-name
+                            (car art-group) to-method))
+                (info (gnus-get-info pto-group))
+                (to-group (gnus-info-group info))
+                to-marks)
+           ;; Update the group that has been moved to.
+           (when (and info
+                      (memq action '(move copy)))
+             (unless (member to-group to-groups)
+               (push to-group to-groups))
+
+             (unless (memq article gnus-newsgroup-unreads)
+               (push 'read to-marks)
+               (gnus-info-set-read
+                info (gnus-add-to-range (gnus-info-read info)
+                                        (list (cdr art-group)))))
+
+             ;; See whether the article is to be put in the cache.
+             (let* ((expirable (gnus-group-auto-expirable-p to-group))
+                    (marks (if expirable
+                               gnus-article-mark-lists
+                             (delete '(expirable . expire)
+                                     (copy-sequence
+                                      gnus-article-mark-lists))))
+                    (to-article (cdr art-group)))
+
+               ;; Enter the article into the cache in the new group,
+               ;; if that is required.
+               (when gnus-use-cache
+                 (gnus-cache-possibly-enter-article
+                  to-group to-article
+                  (memq article gnus-newsgroup-marked)
+                  (memq article gnus-newsgroup-dormant)
+                  (memq article gnus-newsgroup-unreads)))
+
+               (when gnus-preserve-marks
+                 ;; Copy any marks over to the new group.
+                 (when (and (equal to-group gnus-newsgroup-name)
+                            (not (memq article gnus-newsgroup-unreads)))
+                   ;; Mark this article as read in this group.
+                   (push (cons to-article gnus-read-mark)
+                         gnus-newsgroup-reads)
+                   ;; Increase the active status of this group.
+                   (setcdr (gnus-active to-group) to-article)
+                   (setcdr gnus-newsgroup-active to-article))
+
+                 (while marks
+                   (when (eq (gnus-article-mark-to-type (cdar marks)) 'list)
+                     (when (memq article (symbol-value
+                                          (intern (format "gnus-newsgroup-%s"
+                                                          (caar marks)))))
+                       (push (cdar marks) to-marks)
+                       ;; If the other group is the same as this group,
+                       ;; then we have to add the mark to the list.
+                       (when (equal to-group gnus-newsgroup-name)
+                         (set (intern (format "gnus-newsgroup-%s"
+                                              (caar marks)))
+                              (cons to-article
+                                    (symbol-value
+                                     (intern (format "gnus-newsgroup-%s"
+                                                     (caar marks)))))))
+                       ;; Copy the marks to other group.
+                       (gnus-add-marked-articles
+                        to-group (cdar marks) (list to-article) info)))
+                   (setq marks (cdr marks)))
+
+                 (when (and expirable
+                            gnus-mark-copied-or-moved-articles-as-expirable
+                            (not (memq 'expire to-marks)))
+                   ;; Mark this article as expirable.
+                   (push 'expire to-marks)
+                   (when (equal to-group gnus-newsgroup-name)
+                     (push to-article gnus-newsgroup-expirable))
+                   ;; Copy the expirable mark to other group.
+                   (gnus-add-marked-articles
+                    to-group 'expire (list to-article) info))
+
+                 (when to-marks
+                   (gnus-request-set-mark
+                    to-group (list (list (list to-article) 'add to-marks)))))
+
+               (gnus-dribble-enter
+                (concat "(gnus-group-set-info '"
+                        (gnus-prin1-to-string (gnus-get-info to-group))
+                        ")"))))
+
+           ;; Update the Xref header in this article to point to
+           ;; the new crossposted article we have just created.
+           (when (eq action 'crosspost)
+             (with-current-buffer copy-buf
+               (gnus-request-article-this-buffer article gnus-newsgroup-name)
+               (nnheader-replace-header "Xref" new-xref)
+               (gnus-request-replace-article
+                article gnus-newsgroup-name (current-buffer) t)))
+
+           ;; run the move/copy/crosspost/respool hook
+           (let ((header (gnus-data-header
+                          (assoc article (gnus-data-list nil)))))
+             (mail-header-set-subject header gnus-article-original-subject)
+             (run-hook-with-args 'gnus-summary-article-move-hook
+                                 action
+                                 (gnus-data-header
+                                  (assoc article (gnus-data-list nil)))
+                                 gnus-newsgroup-original-name
+                                 to-newsgroup
+                                 select-method)))
+
+         ;;;!!!Why is this necessary?
+         (set-buffer gnus-summary-buffer)
+
+         (when (eq action 'move)
+           (save-excursion
+             (gnus-summary-goto-subject article)
+             (gnus-summary-mark-article article gnus-canceled-mark)))))
+       (push article articles-to-update-marks)))
 
     (save-excursion
       (apply 'gnus-summary-remove-process-mark articles-to-update-marks))
@@ -9891,6 +9947,20 @@ ACTION can be either `move' (the default), `crosspost' or `copy'."
     (gnus-summary-position-point)
     (gnus-set-mode-line 'summary)))
 
+(defun gnus-summary-push-marks-to-backend (article)
+  (let ((set nil)
+       (marks gnus-article-mark-lists))
+    (when (memq article gnus-newsgroup-unreads)
+      (push 'read set))
+    (while marks
+      (when (and (eq (gnus-article-mark-to-type (cdar marks)) 'list)
+                (memq article (symbol-value
+                               (intern (format "gnus-newsgroup-%s"
+                                               (caar marks))))))
+       (push (cdar marks) set))
+      (pop marks))
+    (gnus-request-set-mark gnus-newsgroup-name `(((,article) set ,set)))))
+
 (defun gnus-summary-copy-article (&optional n to-newsgroup select-method)
   "Copy the current article to some other group.
 If TO-NEWSGROUP is string, do not prompt for a newsgroup to copy to.
@@ -9935,9 +10005,9 @@ latter case, they will be copied into the relevant groups."
                                  (car (gnus-find-method-for-group
                                        gnus-newsgroup-name)))))
                (method
-                (gnus-completing-read-with-default
-                 methname "Backend to use when respooling"
-                 methods nil t nil 'gnus-mail-method-history))
+                (gnus-completing-read
+                 "Backend to use when respooling"
+                 methods t nil 'gnus-mail-method-history methname))
                ms)
           (cond
            ((zerop (length (setq ms (gnus-servers-using-backend
@@ -9947,7 +10017,7 @@ latter case, they will be copied into the relevant groups."
             (car ms))
            (t
             (let ((ms-alist (mapcar (lambda (m) (cons (cadr m) m)) ms)))
-              (cdr (assoc (completing-read "Server name: " ms-alist nil t)
+              (cdr (assoc (gnus-completing-read "Server name" ms-alist t)
                           ms-alist))))))))
   (unless method
     (error "No method given for respooling"))
@@ -10143,13 +10213,13 @@ confirmation before the articles are deleted."
          ;; The backend might not have been able to delete the article
          ;; after all.
          (unless (memq (car articles) not-deleted)
-           (gnus-summary-mark-article (car articles) gnus-canceled-mark))
-         (let* ((article (car articles))
-                (ghead  (gnus-data-header
-                         (assoc article (gnus-data-list nil)))))
-           (run-hook-with-args 'gnus-summary-article-delete-hook
-                               'delete ghead gnus-newsgroup-name nil
-                               nil))
+           (gnus-summary-mark-article (car articles) gnus-canceled-mark)
+           (let* ((article (car articles))
+                  (ghead  (gnus-data-header
+                           (assoc article (gnus-data-list nil)))))
+             (run-hook-with-args 'gnus-summary-article-delete-hook
+                                 'delete ghead gnus-newsgroup-name nil
+                                 nil)))
          (setq articles (cdr articles))))
       (when not-deleted
        (gnus-message 4 "Couldn't delete articles %s" not-deleted)))
@@ -10248,7 +10318,7 @@ groups."
   "Make edits to the current article permanent."
   (interactive)
   (save-excursion
-   ;; The buffer restriction contains the entire article if it exists.
+    ;; The buffer restriction contains the entire article if it exists.
     (when (article-goto-body)
       (let ((lines (count-lines (point) (point-max)))
            (length (- (point-max) (point)))
@@ -10268,15 +10338,25 @@ groups."
          (delete-region (match-beginning 1) (match-end 1))
          (insert (number-to-string lines))))))
   ;; Replace the article.
-  (let ((buf (current-buffer)))
+  (let ((buf (current-buffer))
+       (article (cdr gnus-article-current))
+       replace-result)
     (with-temp-buffer
       (insert-buffer-substring buf)
-
       (if (and (not read-only)
-              (not (gnus-request-replace-article
-                    (cdr gnus-article-current) (car gnus-article-current)
-                    (current-buffer) t)))
+              (not (setq replace-result
+                         (gnus-request-replace-article
+                          article (car gnus-article-current)
+                          (current-buffer) t))))
          (error "Couldn't replace article")
+       ;; If we got a number back, then that's the new article number
+       ;; for this article.  Otherwise, the article number didn't change.
+       (when (numberp replace-result)
+         (with-current-buffer gnus-summary-buffer
+           (setq gnus-newsgroup-limit (delq article gnus-newsgroup-limit))
+           (gnus-summary-limit gnus-newsgroup-limit)
+           (setq article replace-result)
+           (gnus-summary-goto-subject article t)))
        ;; Update the summary buffer.
        (if (and references
                 (equal (message-tokenize-header references " ")
@@ -10290,38 +10370,29 @@ groups."
                             (point-min) (point-max)))
                      header)
                  (with-temp-buffer
-                   (insert (format "211 %d Article retrieved.\n"
-                                   (cdr gnus-article-current)))
+                   (insert (format "211 %d Article retrieved.\n" article))
                    (insert head)
                    (insert ".\n")
                    (let ((nntp-server-buffer (current-buffer)))
-                     (setq header (car (gnus-get-newsgroup-headers
-                                        nil t))))
+                     (setq header (car (gnus-get-newsgroup-headers nil t))))
                    (with-current-buffer gnus-summary-buffer
-                     (gnus-data-set-header
-                      (gnus-data-find (cdr gnus-article-current))
-                      header)
-                     (gnus-summary-update-article-line
-                      (cdr gnus-article-current) header)
-                     (if (gnus-summary-goto-subject
-                          (cdr gnus-article-current) nil t)
-                         (gnus-summary-update-secondary-mark
-                          (cdr gnus-article-current))))))))
+                     (gnus-data-set-header (gnus-data-find article) header)
+                     (gnus-summary-update-article-line article header)
+                     (if (gnus-summary-goto-subject article nil t)
+                         (gnus-summary-update-secondary-mark article)))))))
          ;; Update threads.
          (set-buffer (or buffer gnus-summary-buffer))
-         (gnus-summary-update-article (cdr gnus-article-current))
-         (if (gnus-summary-goto-subject (cdr gnus-article-current) nil t)
-             (gnus-summary-update-secondary-mark
-              (cdr gnus-article-current))))
+         (gnus-summary-update-article article)
+         (if (gnus-summary-goto-subject article nil t)
+             (gnus-summary-update-secondary-mark article)))
        ;; Prettify the article buffer again.
        (unless no-highlight
          (with-current-buffer gnus-article-buffer
-           ;;;!!! Fix this -- article should be rehighlighted.
-           ;;;(gnus-run-hooks 'gnus-article-display-hook)
+           ;;!!! Fix this -- article should be rehighlighted.
+           ;;(gnus-run-hooks 'gnus-article-display-hook)
            (set-buffer gnus-original-article-buffer)
            (gnus-request-article
-            (cdr gnus-article-current)
-            (car gnus-article-current) (current-buffer))))
+            article (car gnus-article-current) (current-buffer))))
        ;; Prettify the summary buffer line.
        (when (gnus-visual-p 'summary-highlight 'highlight)
          (gnus-run-hooks 'gnus-visual-mark-article-hook))))))
@@ -10529,7 +10600,7 @@ ARTICLE can also be a list of articles."
            (not (equal gnus-newsgroup-name (car gnus-article-current))))
     (error "No current article selected"))
   ;; Remove old bookmark, if one exists.
-  (gnus-pull article gnus-newsgroup-bookmarks)
+  (gnus-alist-pull article gnus-newsgroup-bookmarks)
   ;; Set the new bookmark, which is on the form
   ;; (article-number . line-number-in-body).
   (push
@@ -10550,7 +10621,7 @@ ARTICLE can also be a list of articles."
   ;; Remove old bookmark, if one exists.
   (if (not (assq article gnus-newsgroup-bookmarks))
       (gnus-message 6 "No bookmark in current article.")
-    (gnus-pull article gnus-newsgroup-bookmarks)
+    (gnus-alist-pull article gnus-newsgroup-bookmarks)
     (gnus-message 6 "Removed bookmark.")))
 
 ;; Suggested by Daniel Quinlan <quinlan@best.com>.
@@ -10676,7 +10747,7 @@ If NO-EXPIRE, auto-expiry will be inhibited."
               (setq gnus-newsgroup-unreads
                     (gnus-add-to-sorted-list gnus-newsgroup-unreads
                                              article))))
-       (gnus-pull article gnus-newsgroup-reads)
+       (gnus-alist-pull article gnus-newsgroup-reads)
 
        ;; See whether the article is to be put in the cache.
        (and gnus-use-cache
@@ -10850,13 +10921,9 @@ If NO-EXPIRE, auto-expiry will be inhibited."
            (t
             (setq gnus-newsgroup-unreads
                   (gnus-add-to-sorted-list gnus-newsgroup-unreads article))))
-      (gnus-pull article gnus-newsgroup-reads)
+      (gnus-alist-pull article gnus-newsgroup-reads)
       t)))
 
-(defalias 'gnus-summary-mark-as-unread-forward
-  'gnus-summary-tick-article-forward)
-(make-obsolete 'gnus-summary-mark-as-unread-forward
-              'gnus-summary-tick-article-forward "Emacs 20.4")
 (defun gnus-summary-tick-article-forward (n)
   "Tick N articles forwards.
 If N is negative, tick backwards instead.
@@ -10864,18 +10931,12 @@ The difference between N and the number of articles ticked is returned."
   (interactive "p")
   (gnus-summary-mark-forward n gnus-ticked-mark))
 
-(defalias 'gnus-summary-mark-as-unread-backward
-  'gnus-summary-tick-article-backward)
-(make-obsolete 'gnus-summary-mark-as-unread-backward
-              'gnus-summary-tick-article-backward "Emacs 20.4")
 (defun gnus-summary-tick-article-backward (n)
   "Tick N articles backwards.
 The difference between N and the number of articles ticked is returned."
   (interactive "p")
   (gnus-summary-mark-forward (- n) gnus-ticked-mark))
 
-(defalias 'gnus-summary-mark-as-unread 'gnus-summary-tick-article)
-(make-obsolete 'gnus-summary-mark-as-unread 'gnus-summary-tick-article "Emacs 20.4")
 (defun gnus-summary-tick-article (&optional article clear-mark)
   "Mark current article as unread.
 Optional 1st argument ARTICLE specifies article number to be marked as unread.
@@ -11211,6 +11272,7 @@ with that article."
                  (mail-header-subject (gnus-data-header (car data)))))
                (t nil)))
         (end-point (save-excursion
+                     (goto-char (gnus-data-pos (car data)))
                      (if (gnus-summary-go-to-next-thread)
                          (point) (point-max))))
         articles)
@@ -11329,15 +11391,19 @@ For compatibility with XEmacs."
   (gnus-remove-overlays (point-min) (point-max) 'invisible 'gnus-sum)
   (gnus-summary-position-point))
 
+(defsubst gnus-summary--inv (p)
+  (and (eq (get-char-property p 'invisible) 'gnus-sum) p))
+
 (defun gnus-summary-show-thread ()
   "Show thread subtrees.
 Returns nil if no thread was there to be shown."
   (interactive)
   (let* ((orig (point))
         (end (point-at-eol))
+         (end (or (gnus-summary--inv end) (gnus-summary--inv (1- end))))
         ;; Leave point at bol
         (beg (progn (beginning-of-line) (if (bobp) (point) (1- (point)))))
-        (eoi (when (eq (get-char-property end 'invisible) 'gnus-sum)
+        (eoi (when end
                (if (fboundp 'next-single-char-property-change)
                    (or (next-single-char-property-change end 'invisible)
                        (point-max))
@@ -11902,7 +11968,8 @@ save those articles instead."
     (nreverse split-name)))
 
 (defun gnus-valid-move-group-p (group)
-  (and (boundp group)
+  (and (symbolp group)
+       (boundp group)
        (symbol-name group)
        (symbol-value group)
        (gnus-get-function (gnus-find-method-for-group
@@ -11919,29 +11986,21 @@ save those articles instead."
                      (format "these %d articles" (length articles))
                    "this article")))
         (to-newsgroup
-         (let (active group)
-           (when (or (null split-name) (= 1 (length split-name)))
-             (setq active (gnus-make-hashtable (length gnus-active-hashtb)))
-             (mapatoms (lambda (symbol)
-                         (setq group (symbol-name symbol))
-                         (when (string-match "[^\000-\177]" group)
-                           (setq group (gnus-group-decoded-name group)))
-                         (set (intern group active) group))
-                       gnus-active-hashtb))
-           (cond
-            ((null split-name)
-             (gnus-completing-read-with-default
-              default prom active 'gnus-valid-move-group-p nil prefix
-              'gnus-group-history))
-            ((= 1 (length split-name))
-             (gnus-completing-read-with-default
-              (car split-name) prom active 'gnus-valid-move-group-p nil nil
-              'gnus-group-history))
-            (t
-             (gnus-completing-read-with-default
-              nil prom (mapcar 'list (nreverse split-name)) nil nil nil
-              'gnus-group-history)))))
-        (to-method (gnus-server-to-method (gnus-group-method to-newsgroup)))
+          (cond
+           ((null split-name)
+            (gnus-group-completing-read
+             prom
+             (gnus-remove-if-not 'gnus-valid-move-group-p gnus-active-hashtb t)
+             nil prefix nil default))
+           ((= 1 (length split-name))
+            (gnus-group-completing-read
+             prom
+            (gnus-remove-if-not 'gnus-valid-move-group-p gnus-active-hashtb t)
+             nil prefix 'gnus-group-history (car split-name)))
+           (t
+            (gnus-completing-read
+             prom (nreverse split-name) nil nil 'gnus-group-history))))
+         (to-method (gnus-server-to-method (gnus-group-method to-newsgroup)))
         encoded)
     (when to-newsgroup
       (if (or (string= to-newsgroup "")
@@ -12638,13 +12697,15 @@ If ALL is a number, fetch this number of articles."
   (interactive)
   (prog1
       (let ((old (sort (mapcar 'car gnus-newsgroup-data) '<))
-           (old-active gnus-newsgroup-active)
+           (old-high gnus-newsgroup-highest)
            (nnmail-fetched-sources (list t))
            i new)
        (setq gnus-newsgroup-active
-             (gnus-activate-group gnus-newsgroup-name 'scan))
-       (setq i (cdr gnus-newsgroup-active))
-       (while (> i (cdr old-active))
+             (gnus-copy-sequence
+              (gnus-activate-group gnus-newsgroup-name 'scan)))
+       (setq i (cdr gnus-newsgroup-active)
+             gnus-newsgroup-highest i)
+       (while (> i old-high)
          (push i new)
          (decf i))
        (if (not new)