X-Git-Url: http://cgit.sxemacs.org/?a=blobdiff_plain;f=lisp%2Fnnoo.el;h=083bedc6e19212c36ee91294b491a664f77c1f25;hb=b0eccd76f35ef80c3ad13f09e588d49358e9c22a;hp=c28c888f30605dbd90a40b85f7e369ad74409b45;hpb=c6b38594419ced3b72313ad23f57526ed0fb4005;p=gnus

diff --git a/lisp/nnoo.el b/lisp/nnoo.el
index c28c888f3..083bedc6e 100644
--- a/lisp/nnoo.el
+++ b/lisp/nnoo.el
@@ -1,15 +1,17 @@
 ;;; nnoo.el --- OO Gnus Backends
-;; Copyright (C) 1996,97 Free Software Foundation, Inc.
 
-;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+;;   2004, 2005, 2006, 2007, 2008, 2009, 2010 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 +19,7 @@
 ;; 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 +36,7 @@
   "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 +59,16 @@
 
 (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 +107,13 @@
     (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 +122,13 @@
     (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 +203,11 @@
 	(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)
@@ -219,7 +237,10 @@
       (nconc bstate (list (cons current state))))))
 
 (defsubst nnoo-current-server-p (backend server)
-  (equal (nnoo-current-server backend) server))
+  (equal (nnoo-current-server backend)
+	 (if nnoo-parent-backend
+	     (format "%s+%s" nnoo-parent-backend server)
+	   server)))
 
 (defun nnoo-current-server (backend)
   (nth 1 (assq backend nnoo-state-alist)))
@@ -285,6 +306,20 @@ 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