Improve group-info handling in nnselect

* lisp/gnus/nnselect.el (nnselect-request-group):
(nnselect-push-info): Use info argument to functions or retrieve the
group info. If the info is null (for example the group might have been
killed) don't try to update it.

diff --git a/lisp/gnus/nnselect.el b/lisp/gnus/nnselect.el
index 1357c4c9555c2981201932cb4e46d3fbcc7a8b74..08c89395fdf9771ff6ce8151fa770e2d3dc01741 100644 (file)
--- a/lisp/gnus/nnselect.el
+++ b/lisp/gnus/nnselect.el
@@ -185,7 +185,7 @@ If this variable is nil, or if the provided function returns nil,
   (let ((backend (or (car (gnus-server-to-method server)) 'nnselect)))
     (nnoo-change-server backend server definitions)))
 
-(deffoo nnselect-request-group (group &optional server dont-check _info)
+(deffoo nnselect-request-group (group &optional server dont-check info)
   (let ((group (nnselect-possibly-change-group group server))
        length)
     ;; Check for cached select result or run the selection and cache
@@ -196,7 +196,8 @@ If this variable is nil, or if the provided function returns nil,
        (setq nnselect-artlist
             (nnselect-run
              (gnus-group-get-parameter group 'nnselect-specs t))))
-      (nnselect-request-update-info group (gnus-get-info group)))
+      (nnselect-request-update-info
+       group (or info (gnus-get-info group))))
     (if (zerop (setq length (nnselect-artlist-length nnselect-artlist)))
        (progn
          (nnselect-close-group group)
@@ -696,77 +697,78 @@ originating groups."
       (let* ((group-info (gnus-get-info artgroup))
             (old-unread (gnus-list-of-unread-articles artgroup))
             newmarked)
-       (pcase-dolist (`(,_mark . ,type) gnus-article-mark-lists)
-         (let ((select-type
-                (sort
-                 (cdr (assoc artgroup  (alist-get type mark-list)))
-                 '<))  list)
-           (setq list
-                 (gnus-uncompress-range
-                  (gnus-add-to-range
-                   (gnus-remove-from-range
-                    (alist-get type (gnus-info-marks group-info))
-                    artlist)
-                   select-type)))
-
-           (when list
-             ;; Get rid of the entries of the articles that have the
-             ;; default score.
-             (when (and (eq type 'score)
-                        gnus-save-score
-                        list)
-               (let* ((arts list)
-                      (prev (cons nil list))
-                      (all prev))
-                 (while arts
-                   (if (or (not (consp (car arts)))
-                           (= (cdar arts) gnus-summary-default-score))
-                       (setcdr prev (cdr arts))
-                     (setq prev arts))
-                   (setq arts (cdr arts)))
-                 (setq list (cdr all)))))
-
-           (when  (or (eq (gnus-article-mark-to-type type) 'list)
-                      (eq (gnus-article-mark-to-type type) 'range))
+       (when group-info
+         (pcase-dolist (`(,_mark . ,type) gnus-article-mark-lists)
+           (let ((select-type
+                  (sort
+                   (cdr (assoc artgroup  (alist-get type mark-list)))
+                   '<))  list)
              (setq list
-                   (gnus-compress-sequence  (sort list '<) t)))
-
-           ;; When exiting the group, everything that's previously been
-           ;; unseen is now seen.
-           (when (eq  type 'seen)
-             (setq list (gnus-range-add
-                         list (cdr (assoc artgroup select-unseen)))))
-
-           (when (or list (eq  type 'unexist))
-             (push (cons  type list) newmarked))))
-
-       (gnus-atomic-progn
-         ;; Enter these new marks into the info of the group.
-         (if (nthcdr 3 group-info)
-             (setcar (nthcdr 3 group-info) newmarked)
-           ;; Add the marks lists to the end of the info.
-           (when newmarked
-             (setcdr (nthcdr 2 group-info) (list newmarked))))
-
-         ;; Cut off the end of the info if there's nothing else there.
-         (let ((i 5))
-           (while (and (> i 2)
-                       (not (nth i group-info)))
-             (when (nthcdr (cl-decf i) group-info)
-               (setcdr (nthcdr i group-info) nil))))
-
-         ;; update read and unread
-         (gnus-update-read-articles
-          artgroup
-          (gnus-uncompress-range
-           (gnus-add-to-range
-            (gnus-remove-from-range
-             old-unread
-             (cdr (assoc artgroup select-reads)))
-            (sort (cdr (assoc artgroup select-unreads)) '<))))
-         (gnus-get-unread-articles-in-group
-          group-info (gnus-active artgroup) t)
-         (gnus-group-update-group artgroup t))))))
+                   (gnus-uncompress-range
+                    (gnus-add-to-range
+                     (gnus-remove-from-range
+                      (alist-get type (gnus-info-marks group-info))
+                      artlist)
+                     select-type)))
+
+             (when list
+               ;; Get rid of the entries of the articles that have the
+               ;; default score.
+               (when (and (eq type 'score)
+                          gnus-save-score
+                          list)
+                 (let* ((arts list)
+                        (prev (cons nil list))
+                        (all prev))
+                   (while arts
+                     (if (or (not (consp (car arts)))
+                             (= (cdar arts) gnus-summary-default-score))
+                         (setcdr prev (cdr arts))
+                       (setq prev arts))
+                     (setq arts (cdr arts)))
+                   (setq list (cdr all)))))
+
+             (when  (or (eq (gnus-article-mark-to-type type) 'list)
+                        (eq (gnus-article-mark-to-type type) 'range))
+               (setq list
+                     (gnus-compress-sequence  (sort list '<) t)))
+
+             ;; When exiting the group, everything that's previously been
+             ;; unseen is now seen.
+             (when (eq  type 'seen)
+               (setq list (gnus-range-add
+                           list (cdr (assoc artgroup select-unseen)))))
+
+             (when (or list (eq  type 'unexist))
+               (push (cons  type list) newmarked))))
+
+         (gnus-atomic-progn
+           ;; Enter these new marks into the info of the group.
+           (if (nthcdr 3 group-info)
+               (setcar (nthcdr 3 group-info) newmarked)
+             ;; Add the marks lists to the end of the info.
+             (when newmarked
+               (setcdr (nthcdr 2 group-info) (list newmarked))))
+
+           ;; Cut off the end of the info if there's nothing else there.
+           (let ((i 5))
+             (while (and (> i 2)
+                         (not (nth i group-info)))
+               (when (nthcdr (cl-decf i) group-info)
+                 (setcdr (nthcdr i group-info) nil))))
+
+           ;; update read and unread
+           (gnus-update-read-articles
+            artgroup
+            (gnus-uncompress-range
+             (gnus-add-to-range
+              (gnus-remove-from-range
+               old-unread
+               (cdr (assoc artgroup select-reads)))
+              (sort (cdr (assoc artgroup select-unreads)) '<))))
+           (gnus-get-unread-articles-in-group
+            group-info (gnus-active artgroup) t)
+           (gnus-group-update-group artgroup t)))))))
 
 
 (declare-function gnus-registry-get-id-key "gnus-registry" (id key))