X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=lisp%2Fgnus-undo.el;h=5794f9ee0861e104858e497d98329e773ea1d345;hb=4cacb5f23eb830e6950dba987063f413977708d7;hp=11a18efc65ceb5d00c412c09a51ad581c6f357c4;hpb=f3f6bec59bef8d04e0f0ffa5b20e0ed47234b701;p=elisp%2Fgnus.git-

diff --git a/lisp/gnus-undo.el b/lisp/gnus-undo.el
index 11a18ef..5794f9e 100644
--- a/lisp/gnus-undo.el
+++ b/lisp/gnus-undo.el
@@ -1,7 +1,9 @@
 ;;; gnus-undo.el --- minor mode for undoing in Gnus
-;; Copyright (C) 1996,97,98 Free Software Foundation, Inc.
 
-;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004,
+;;   2005 Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;; Keywords: news
 
 ;; This file is part of GNU Emacs.
@@ -18,8 +20,8 @@
 
 ;; 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.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
 
 ;;; Commentary:
 
@@ -49,11 +51,24 @@
 (require 'gnus-util)
 (require 'gnus)
 
-(defvar gnus-undo-mode nil
-  "Minor mode for undoing in Gnus buffers.")
+(defgroup gnus-undo nil
+  "Undoing in Gnus buffers."
+  :group 'gnus)
+
+(defcustom gnus-undo-limit 2000
+  "The number of undoable actions recorded."
+  :type 'integer
+  :group 'gnus-undo)
+
+(defcustom gnus-undo-mode nil
+  "Minor mode for undoing in Gnus buffers."
+  :type 'boolean
+  :group 'gnus-undo)
 
-(defvar gnus-undo-mode-hook nil
-  "Hook called in all `gnus-undo-mode' buffers.")
+(defcustom gnus-undo-mode-hook nil
+  "Hook called in all `gnus-undo-mode' buffers."
+  :type 'hook
+  :group 'gnus-undo)
 
 ;;; Internal variables.
 
@@ -70,11 +85,11 @@
   (setq gnus-undo-mode-map (make-sparse-keymap))
 
   (gnus-define-keys gnus-undo-mode-map
-   "\M-\C-_"     gnus-undo
-   "\C-_"        gnus-undo
-   "\C-xu"       gnus-undo
-   ;; many people are used to type `C-/' on X terminals and get `C-_'.
-   [(control /)] gnus-undo))
+    "\M-\C-_"     gnus-undo
+    "\C-_"        gnus-undo
+    "\C-xu"       gnus-undo
+    ;; many people are used to type `C-/' on X terminals and get `C-_'.
+    [(control /)] gnus-undo))
 
 (defun gnus-undo-make-menu-bar ()
   ;; This is disabled for the time being.
@@ -97,8 +112,8 @@
     ;; Set up the menu.
     (when (gnus-visual-p 'undo-menu 'menu)
       (gnus-undo-make-menu-bar))
-    (gnus-add-minor-mode 'gnus-undo-mode "" gnus-undo-mode-map)
-    (make-local-hook 'post-command-hook)
+    (add-minor-mode 'gnus-undo-mode "" gnus-undo-mode-map)
+    (gnus-make-local-hook 'post-command-hook)
     (add-hook 'post-command-hook 'gnus-undo-boundary nil t)
     (gnus-run-hooks 'gnus-undo-mode-hook)))
 
@@ -148,6 +163,11 @@ FORMS may use backtick quote syntax."
      ;; Initialize list.
      (t
       (setq gnus-undo-actions (list (list function)))))
+    ;; Limit the length of the undo list.
+    (let ((next (nthcdr gnus-undo-limit gnus-undo-actions)))
+      (when next
+	(setcdr next nil)))
+    ;; We are not at a boundary...
     (setq gnus-undo-boundary-inhibit t)))
 
 (defun gnus-undo (n)
@@ -166,8 +186,7 @@ A numeric argument serves as a repeat count."
       (error "Nothing further to undo"))
     (setq gnus-undo-actions (delq action gnus-undo-actions))
     (setq gnus-undo-boundary t)
-    (while action
-      (funcall (pop action)))))
+    (mapc 'funcall action)))
 
 (provide 'gnus-undo)