Remove nnml-retrieve-groups that is unnecessary and somewhat problematic

[gnus] / lisp / nnoo.el

diff --git a/lisp/nnoo.el b/lisp/nnoo.el
index 84924d9..8fe83a4 100644 (file)
--- a/lisp/nnoo.el
+++ b/lisp/nnoo.el
@@ -1,15 +1,16 @@
 ;;; nnoo.el --- OO Gnus Backends
-;; Copyright (C) 1996,97 Free Software Foundation, Inc.
 
-;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;; Copyright (C) 1996-2015 Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;; Keywords: news
 
 ;; This file is part of GNU Emacs.
 
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; GNU Emacs is free software: you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
 
 ;; GNU Emacs is distributed in the hope that it will be useful,
 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -17,9 +18,7 @@
 ;; GNU General Public License for more details.
 
 ;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING.  If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
 
 ;;; Commentary:
 
@@ -36,7 +35,7 @@
   "The same as `defvar', only takes list of variables to MAP to."
   `(prog1
        ,(if doc
-           `(defvar ,var ,init ,doc)
+           `(defvar ,var ,init ,(concat doc "\n\nThis is a Gnus server variable.  See Info node `(gnus)Select Methods'."))
          `(defvar ,var ,init))
      (nnoo-define ',var ',map)))
 (put 'defvoo 'lisp-indent-function 2)
@@ -59,12 +58,16 @@
 
 (defmacro nnoo-declare (backend &rest parents)
   `(eval-and-compile
-     (push (list ',backend
-                (mapcar (lambda (p) (list p)) ',parents)
-                nil nil)
-          nnoo-definition-alist)
-     (push (list ',backend "*internal-non-initialized-backend*")
-          nnoo-state-alist)))
+     (if (assq ',backend nnoo-definition-alist)
+        (setcar (cdr (assq ',backend nnoo-definition-alist))
+                (mapcar 'list ',parents))
+       (push (list ',backend
+                  (mapcar 'list ',parents)
+                  nil nil)
+            nnoo-definition-alist))
+     (unless (assq ',backend nnoo-state-alist)
+       (push (list ',backend "*internal-non-initialized-backend*")
+            nnoo-state-alist))))
 (put 'nnoo-declare 'lisp-indent-function 1)
 
 (defun nnoo-parents (backend)
@@ -103,7 +106,13 @@
     (nnoo-change-server pbackend
                        (nnoo-current-server backend)
                        (cdr (assq pbackend (nnoo-parents backend))))
-    (apply function args)))
+    (prog1
+       (apply function args)
+      ;; Copy the changed variables back into the child.
+      (let ((vars (cdr (assq pbackend (nnoo-parents backend)))))
+       (while vars
+         (set (cadar vars) (symbol-value (caar vars)))
+         (setq vars (cdr vars)))))))
 
 (defun nnoo-execute (backend function &rest args)
   "Execute FUNCTION on behalf of BACKEND."
@@ -112,7 +121,13 @@
     (nnoo-change-server pbackend
                        (nnoo-current-server backend)
                        (cdr (assq pbackend (nnoo-parents backend))))
-    (apply function args)))
+    (prog1
+       (apply function args)
+      ;; Copy the changed variables back into the child.
+      (let ((vars (cdr (assq pbackend (nnoo-parents backend)))))
+       (while vars
+         (set (cadar vars) (symbol-value (caar vars)))
+         (setq vars (cdr vars)))))))
 
 (defmacro nnoo-map-functions (backend &rest maps)
   `(nnoo-map-functions-1 ',backend ',maps))
@@ -187,9 +202,11 @@
        (while (setq def (pop defs))
          (unless (assq (car def) bvariables)
            (nconc bvariables
-                  (list (cons (car def) (and (boundp (car def))
-                                             (symbol-value (car def)))))))
-         (set (car def) (cadr def))))
+                  (list (cons (car def) (and (boundp (car def))
+                                             (symbol-value (car def)))))))
+         (if (equal server "*internal-non-initialized-backend*")
+             (set (car def) (symbol-value (cadr def)))
+           (set (car def) (cadr def)))))
       (while parents
        (nnoo-change-server
         (caar parents) (format "%s+%s" backend server)
@@ -288,6 +305,20 @@ All functions will return nil and report an error."
                   (&rest args)
                 (nnheader-report ',backend ,(format "%s-%s not implemented"
                                                     backend function))))))))
+
+(defun nnoo-set (server &rest args)
+  (let ((parents (nnoo-parents (car server)))
+       (nnoo-parent-backend (car server)))
+    (while parents
+      (nnoo-change-server (caar parents)
+                         (cadr server)
+                         (cdar parents))
+      (pop parents)))
+  (nnoo-change-server (car server)
+                     (cadr server) (cddr server))
+  (while args
+    (set (pop args) (pop args))))
+
 (provide 'nnoo)
 
-;;; nnoo.el ends here.
+;;; nnoo.el ends here