Fix CRLF eols.

1 files changed, 1060 insertions, 1060 deletions

diff --git a/lisp/recentf.el b/lisp/recentf.el
index dc040be910b..82357dbe0b5 100644
--- a/lisp/recentf.el
+++ b/lisp/recentf.el
@@ -1,1060 +1,1060 @@
-;; recentf.el --- setup a menu of recently opened files

-

-;; Copyright (C) 1999, 2000 Free Software Foundation, Inc.

-

-;; Author: David Ponce <david@dponce.com>

-;; Created: July 19 1999

-;; Keywords: customization

-

-;; This file is part of GNU Emacs.

-

-;; 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.

-

-;; GNU Emacs is distributed in the hope that it will be useful,

-;; but WITHOUT ANY WARRANTY; without even the implied warranty of

-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

-;; 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.

-

-;;; Commentary:

-

-;; This package maintains a menu for visiting files that were operated

-;; on recently. When enabled a new "Open Recent" submenu is displayed

-;; in the "Files" menu. The recent files list is automatically saved

-;; across Emacs sessions.  You can customize the number of recent

-;; files displayed, the location of the menu and others options (see

-;; the source code for details).  To install and use, put the file on

-;; your Emacs-Lisp load path and add the following into your ~/.emacs

-;; startup file:

-;;

-;;  (require 'recentf)

-;;  (recentf-mode 1) 

-

-;;; Code:

-

-(require 'easymenu)

-(require 'wid-edit)

-

-(defconst recentf-save-file-header

-  ";;; Automatically generated by `recentf' on %s.\n"

-  "Header to be written into the `recentf-save-file'.")

-

-(defvar recentf-list nil

-  "List of recently opened files.")

-

-(defvar recentf-update-menu-p t

-  "Non-nil if the recentf menu must be updated.")

-

-(defvar recentf-initialized-p nil

-  "Non-nil if recentf already initialized.")

-

-;; IMPORTANT: This function must be defined before the following defcustoms

-;; because it is used in their :set clause. To avoid byte-compiler warnings

-;; the `symbol-value' function is used to access the `recentf-menu-path'

-;; and `recentf-menu-title' values.

-(defun recentf-menu-customization-changed (sym val)

-  "Function called when menu customization has changed.

-It removes the recentf menu and forces its complete redrawing."

-  (when recentf-initialized-p

-    (easy-menu-remove-item nil 

-                           (symbol-value 'recentf-menu-path)

-                           (symbol-value 'recentf-menu-title))

-    (setq recentf-update-menu-p t))

-  (custom-set-default sym val))

-

-(defgroup recentf nil

-  "Maintain a menu of recently opened files."

-  :version "21.1"

-  :group 'files)

-

-(defgroup recentf-filters nil

-  "Group to customize recentf menu filters.

-You should define the options of your own filters in this group."

-  :group 'recentf)

-

-(defcustom recentf-max-saved-items 20

-  "*Maximum number of items saved to `recentf-save-file'."

-  :group 'recentf

-  :type 'integer)

-

-(defcustom recentf-save-file (expand-file-name "~/.recentf")

-  "*File to save `recentf-list' into."

-  :group 'recentf

-  :type 'file)

-

-(defcustom recentf-exclude nil

-  "*List of regexps for filenames excluded from `recentf-list'."

-  :group 'recentf

-  :type '(repeat regexp))

-

-(defcustom recentf-menu-title "Open Recent"

-  "*Name of the recentf menu."

-  :group 'recentf

-  :type 'string

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-menu-path '("files")

-  "*Path where to add the recentf menu.

-If nil add it at top-level (see also `easy-menu-change')."

-  :group 'recentf

-  :type '(choice (const :tag "Top Level" nil)

-                 (sexp :tag "Menu Path"))

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-menu-before "open-file"

-  "*Name of the menu before which the recentf menu will be added.

-If nil add it at end of menu (see also `easy-menu-change')."

-  :group 'recentf

-  :type '(choice (string :tag "Name")

-                 (const :tag "Last" nil))

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-menu-action 'recentf-find-file

-  "*Function to invoke with a filename item of the recentf menu.

-The default action `recentf-find-file' calls `find-file' to edit an

-existing file.  If the file does not exist or is not readable, it is

-not edited and its name is removed from `recentf-list'. You can use

-`find-file' instead to open non-existing files and keep them in the

-list of recently opened files."

-  :group 'recentf

-  :type 'function

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-max-menu-items 10

-  "*Maximum number of items in the recentf menu."

-  :group 'recentf

-  :type 'integer

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-menu-filter nil

-  "*Function used to filter files displayed in the recentf menu.

-Nil means no filter.  The following functions are predefined:

-

-- - `recentf-sort-ascending' to sort menu items in ascending order.

-- - `recentf-sort-descending' to sort menu items in descending order.

-- - `recentf-sort-basenames-ascending' to sort file names in descending order.

-- - `recentf-sort-basenames-descending' to sort file names in descending order.

-- - `recentf-sort-directories-ascending' to sort directories in ascending order.

-- - `recentf-sort-directories-descending' to sort directories in descending order.

-- - `recentf-show-basenames' to show file names (no directories) in menu items.

-- - `recentf-show-basenames-ascending' to show file names in ascending order.

-- - `recentf-show-basenames-descending' to show file names in descending order.

-- - `recentf-relative-filter' to show file names relative to `default-directory'.

-- - `recentf-arrange-by-rule' to show sub-menus following user defined rules.

-- - `recentf-arrange-by-mode' to show a sub-menu for each major mode.

-- - `recentf-arrange-by-dir' to show a sub-menu for each directory.

-- - `recentf-filter-changer' to manage a ring of filters.

-

-The filter function is called with one argument, the list of menu elements

-used to build the menu and must return a new list of menu elements (see

-`recentf-make-menu-element' for menu element form)."

-  :group 'recentf

-  :type 'function

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-menu-append-commands-p t

-  "*If not-nil command items are appended to the menu."

-  :group 'recentf

-  :type 'boolean

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-keep-non-readable-files-p nil

-  "*If nil (default), non-readable files are not kept in `recentf-list'."

-  :group 'recentf

-  :type 'boolean

-  :require 'recentf

-  :initialize 'custom-initialize-default

-  :set (lambda (sym val)

-         (if val

-             (remove-hook 'kill-buffer-hook 'recentf-remove-file-hook)

-           (add-hook 'kill-buffer-hook 'recentf-remove-file-hook))

-         (custom-set-default sym val)))

-

-(defcustom recentf-mode nil

-  "Toggle recentf mode.

-When recentf mode is enabled, it maintains a menu for visiting files that

-were operated on recently.

-Setting this variable directly does not take effect;

-use either \\[customize] or the function `recentf-mode'."

-  :set (lambda (symbol value)

-         (recentf-mode (or value 0)))

-  :initialize 'custom-initialize-default

-  :type 'boolean

-  :group 'recentf

-  :require 'recentf)

-

-(defcustom recentf-load-hook nil

-   "*Normal hook run at end of loading the `recentf' package."

-  :group 'recentf

-  :type 'hook)

-

-;;;

-;;; Common functions

-;;;

-(defconst recentf-case-fold-search

-  (memq system-type '(vax-vms windows-nt))

-  "Non-nil if recentf searches and matches should ignore case.")

-

-(defun recentf-include-p (filename)

-  "Return t if FILENAME matches none of the `recentf-exclude' regexps."

-  (let ((case-fold-search recentf-case-fold-search)

-        (rl recentf-exclude))

-    (while (and rl (not (string-match (car rl) filename)))

-      (setq rl (cdr rl)))

-    (null rl)))

-

-(defun recentf-add-file (filename)

-  "Add or move FILENAME at the beginning of `recentf-list'.

-Does nothing if FILENAME matches one of the `recentf-exclude' regexps."

-  (let ((filename (expand-file-name filename)))

-    (when (recentf-include-p filename)

-      (setq recentf-list (cons filename (delete filename recentf-list)))

-      (setq recentf-update-menu-p t))))

-

-(defun recentf-remove-if-non-readable (filename)

-  "Remove FILENAME from `recentf-list' if not readable."

-  (unless (file-readable-p filename)

-    (setq recentf-list (delete filename recentf-list))

-    (setq recentf-update-menu-p t)))

-

-(defun recentf-find-file (filename)

-  "Edit file FILENAME using `find-file'.

-If FILENAME is not readable it is removed from `recentf-list'."

-  (if (file-readable-p filename)

-      (find-file filename)

-    (progn

-      (message "File `%s' not found." filename)

-      (setq recentf-list (delete filename recentf-list))

-      (setq recentf-update-menu-p t))))

-

-(defun recentf-trunc-list (l n)

-  "Return a list of the first N elements of L."

-  (let ((lh nil))

-    (while (and l (> n 0))

-      (setq lh (cons (car l) lh))

-      (setq n (1- n))

-      (setq l (cdr l)))

-    (nreverse lh)))

-

-(defun recentf-elements (n)

-  "Return a list of the first N elements of `recentf-list'."

-  (recentf-trunc-list recentf-list n))

-

-(defun recentf-make-menu-element (menu-item menu-value)

-  "Create a new menu-element.

-

-A menu element is a pair (MENU-ITEM . MENU-VALUE) where:

-

-- - MENU-ITEM  is the menu item string displayed.

-- - MENU-VALUE is the path used to open the file when the

-               corresponding MENU-ITEM is selected. Or it is

-               a pair (SUB-MENU-TITLE . MENU-ELEMENTS) where

-               SUB-MENU-TITLE is a sub-menu title and

-               MENU-ELEMENTS is the list of menu elements in

-               the sub-menu."

-  (cons menu-item menu-value))

-

-(defun recentf-menu-element-item (e)

-  "Return the item part of the menu-element E."

-  (car e))

-

-(defun recentf-menu-element-value (e)

-  "Return the value part of the menu-element E."

-  (cdr e))

-

-(defun recentf-set-menu-element-item (e item)

-  "Change the item part of menu-element E to ITEM."

-  (setcar e item))

-

-(defun recentf-set-menu-element-value (e value)

-  "Change the value part of menu-element E to VALUE."

-  (setcdr e value))

-

-(defun recentf-sub-menu-element-p (e)

-  "Return non-nil if menu-element E defines a sub-menu."

-  (consp (recentf-menu-element-value e)))

-

-(defun recentf-make-default-menu-element (file-path)

-  "Make a new default menu element (MENU-ITEM . MENU-VALUE) for the

-given recent file path FILE-PATH. MENU-ITEM and MENU-VALUE are set to

-FILE-PATH. See also `recentf-make-menu-element'."

-  (recentf-make-menu-element file-path file-path))

-

-(defun recentf-menu-elements (n)

-  "Return a list of the first N default menu elements from

-`recentf-list'. See also `recentf-make-default-menu-element'."

-  (mapcar 'recentf-make-default-menu-element

-          (recentf-elements n)))

-

-(defun recentf-apply-menu-filter (filter l)

-  "Convenient funtion to apply the function FILTER to the list of

-menu-elements L. It takes care of sub-menu elements in L and

-recursively apply FILTER to them. It is guarantee than FILTER receives

-only a list of single menu-elements (no sub-menu)."

-  (if (and (functionp filter) l)

-      (let ((case-fold-search recentf-case-fold-search)

-            menu-element sub-menu-elements single-elements)

-        ;; split L in two sub-listes:

-        ;;   one of sub-menus elements and

-        ;;   one of single menu elements

-        (while l

-          (setq menu-element (car l))

-          (if (recentf-sub-menu-element-p menu-element)

-              (setq sub-menu-elements

-                    (cons menu-element sub-menu-elements))

-            (setq single-elements

-                  (cons menu-element single-elements)))

-          (setq l (cdr l)))

-        ;; apply FILTER to the list of single menu elements

-        (if single-elements

-            (setq single-elements (funcall filter

-                                           (nreverse single-elements))))

-        ;; apply FILTER to sub-menu menu element list

-        (setq l sub-menu-elements)

-        (setq sub-menu-elements nil)

-        (while l

-          (setq menu-element (car l))

-          (recentf-set-menu-element-value

-           menu-element

-           (recentf-apply-menu-filter

-            filter

-            (recentf-menu-element-value menu-element)))

-          (setq sub-menu-elements (cons menu-element sub-menu-elements))

-          (setq l (cdr l)))

-        ;; build and return the new filtered menu element list

-        (nconc sub-menu-elements single-elements))

-    l))

-

-(defvar recentf-menu-items-for-commands

-  (list ["Cleanup list" recentf-cleanup t]

-        ["Edit list..." recentf-edit-list t]

-        ["Save list now" recentf-save-list t]

-        (vector "Recentf Options..." '(customize-group "recentf") t))

-  "List of menu items for recentf commands.")

-

-(defvar recentf-menu-filter-commands nil

-  "This variable can be used by menu filters to setup their own command menu.

-

-If non-nil it must contain a list of valid menu-items to be appended

-to the recent file list part of the menu.  Before calling a menu

-filter function this variable is reset to nil.")

-

-(defun recentf-make-menu-items ()

-  "Make menu items from `recentf-list'."

-  (setq recentf-menu-filter-commands nil)

-  (let ((file-items

-         (mapcar 'recentf-make-menu-item

-                 (recentf-apply-menu-filter

-                  recentf-menu-filter

-                  (recentf-menu-elements recentf-max-menu-items)))))

-    (append (or file-items (list ["No files" t nil]))

-            (and (< recentf-max-menu-items (length recentf-list))

-                 (list ["More..." recentf-open-more-files t]))

-            (and recentf-menu-filter-commands

-                 (cons "---"

-                       recentf-menu-filter-commands))

-            (and recentf-menu-append-commands-p

-                 (cons "---"

-                       recentf-menu-items-for-commands)))))

-

-(defun recentf-make-menu-item (menu-element)

-  "Make a menu item from a menu element (see `recentf-make-menu-element')."

-  (let ((menu-item  (recentf-menu-element-item  menu-element))

-        (menu-value (recentf-menu-element-value menu-element)))

-    (if (recentf-sub-menu-element-p menu-element)

-        (cons menu-item (mapcar 'recentf-make-menu-item menu-value))

-      (vector menu-item

-              (list recentf-menu-action menu-value)

-              t))))

-

-;;;

-;;; Predefined menu filter functions

-;;;

-

-(defun recentf-sort-ascending (l)

-  "Sort the list of menu elements L in ascending order.

-The MENU-ITEM part of each menu element is compared."

-  (sort (copy-sequence l)

-        (function

-         (lambda (e1 e2)

-           (string-lessp (recentf-menu-element-item e1)

-                         (recentf-menu-element-item e2))))))

-

-(defun recentf-sort-descending (l)

-  "Sort the list of menu elements L in descending order.

-The MENU-ITEM part of each menu element is compared."

-  (sort (copy-sequence l)

-        (function

-         (lambda (e1 e2)

-           (string-lessp (recentf-menu-element-item e2)

-                         (recentf-menu-element-item e1))))))

-

-(defun recentf-sort-basenames-ascending (l)

-  "Sort the list of menu elements L in ascending order.

-Only file names (without directories) are compared."

-  (sort (copy-sequence l)

-        (function

-         (lambda (e1 e2)

-           (string-lessp

-            (file-name-nondirectory (recentf-menu-element-value e1))

-            (file-name-nondirectory (recentf-menu-element-value e2)))))))

-

-(defun recentf-sort-basenames-descending (l)

-  "Sort the list of menu elements L in descending order.

-Only file names (without directories) are compared."

-  (sort (copy-sequence l)

-        (function

-         (lambda (e1 e2)

-           (string-lessp

-            (file-name-nondirectory (recentf-menu-element-value e2))

-            (file-name-nondirectory (recentf-menu-element-value e1)))))))

-

-(defun recentf-directory-compare (p1 p2)

-  "Compare directories then filenames in pathes P1 and P2 and return

-non-nil if P1 is less than P2."

-  (let ((d1 (file-name-directory    p1))

-        (f1 (file-name-nondirectory p1))

-        (d2 (file-name-directory    p2))

-        (f2 (file-name-nondirectory p2)))

-    (if (string= d1 d2)

-        (string-lessp f1 f2)

-      (string-lessp d1 d2))))

-

-(defun recentf-sort-directories-ascending (l)

-  "Sort the list of menu elements L in ascending order.

-Compares directories then filenames to order the list."

-  (sort (copy-sequence l)

-        (function

-         (lambda (e1 e2)

-           (recentf-directory-compare (recentf-menu-element-value e1)

-                                      (recentf-menu-element-value e2))))))

-

-(defun recentf-sort-directories-descending (l)

-  "Sort the list of menu elements L in descending order.

-Compares directories then filenames to order the list."

-  (sort (copy-sequence l)

-        (function

-         (lambda (e1 e2)

-           (recentf-directory-compare (recentf-menu-element-value e2)

-                                      (recentf-menu-element-value e1))))))

-

-(defun recentf-show-basenames (l)

-  "Filter the list of menu elements L to show only file names (no directories)

-in the menu. When file names are duplicated their directory component is added."

-  (let ((names  (mapcar (function

-                         (lambda (item)

-                           (file-name-nondirectory

-                            (recentf-menu-element-value item))))

-                        l))

-        (dirs   (mapcar (function

-                         (lambda (item)

-                           (file-name-directory

-                            (recentf-menu-element-value item))))

-                        l))

-        (pathes (mapcar 'recentf-menu-element-value l))

-        (pos    -1)

-        item filtered-items filtered-list)

-    (while names

-      (setq item  (car names))

-      (setq names (cdr names))

-      (setq pos   (1+ pos))

-      (setq filtered-list

-            (cons (recentf-make-menu-element

-                   (if (or (member item names) (member item filtered-items))

-                       (concat item " (" (nth pos dirs) ")")

-                     item)

-                   (nth pos pathes))

-                  filtered-list))

-      (setq filtered-items (cons item filtered-items)))

-    (nreverse filtered-list)))

-

-(defun recentf-show-basenames-ascending (l)

-  "Filter the list of menu elements L to show only file names in the menu,

-sorted in ascending order. This filter combines the `recentf-sort-basenames-ascending'

-and `recentf-show-basenames' filters."

-  (recentf-show-basenames (recentf-sort-basenames-ascending l)))

-

-(defun recentf-show-basenames-descending (l)

-  "Filter the list of menu elements L to show only file names in the menu,

-sorted in descending order. This filter combines the `recentf-sort-basenames-descending'

-and `recentf-show-basenames' filters."

-  (recentf-show-basenames (recentf-sort-basenames-descending l)))

-

-(defun recentf-relative-filter (l)

-  "Filter the list of `recentf-menu-elements' L to show filenames

-relative to `default-directory'."

-  (setq recentf-update-menu-p t)        ; force menu update

-  (mapcar (function

-           (lambda (menu-element)

-             (let* ((ful-path (recentf-menu-element-value menu-element))

-                    (rel-path (file-relative-name ful-path)))

-               (if (string-match "^\\.\\." rel-path)

-                   menu-element

-                 (recentf-make-menu-element rel-path ful-path)))))

-          l))

-

-(defcustom recentf-arrange-rules

-  '(

-    ("Elisp files (%d)" ".\\.el$")

-    ("Java files (%d)"  ".\\.java$")

-    ("C/C++ files (%d)" "c\\(pp\\)?$")

-    )

-  "*List of rules used by `recentf-arrange-by-rule' to build sub-menus.

-A rule is a pair (SUB-MENU-TITLE . MATCHER). SUB-MENU-TITLE is the

-displayed title of the sub-menu where a '%d' `format' pattern is

-replaced by the number of items in the sub-menu. MATCHER is a regexp

-or a list of regexps. Items matching one of the regular expressions in

-MATCHER are added to the corresponding sub-menu."

-  :group 'recentf-filters

-  :type '(repeat (cons string (repeat regexp)))

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-arrange-by-rule-others "Other files (%d)"

-  "*Title of the `recentf-arrange-by-rule' sub-menu where items that

-don't match any `recentf-arrange-rules' are displayed. If nil

-these items are displayed in the main recent files menu. A '%d'

-`format' pattern in the title is replaced by the number of items in

-the sub-menu."

-  :group 'recentf-filters

-  :type '(choice (const  :tag "Main menu" nil)

-                 (string :tag "Title"))

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-arrange-by-rules-min-items 0

-  "*Minimum number of items in a `recentf-arrange-by-rule' sub-menu.

-If the number of items in a sub-menu is less than this value the

-corresponding sub-menu items are displayed in the main recent files

-menu or in the `recentf-arrange-by-rule-others' sub-menu if

-defined."

-  :group 'recentf-filters

-  :type 'number

-  :set 'recentf-menu-customization-changed)

-

-(defcustom recentf-arrange-by-rule-subfilter nil

-  "*Function used by `recentf-arrange-by-rule' to filter sub-menu elements.

-Nil means no filter. See also `recentf-menu-filter'. You can't use

-`recentf-arrange-by-rule' itself here!"

-  :group 'recentf-filters

-  :type 'function

-  :set (lambda (sym val)

-         (if (eq val 'recentf-arrange-by-rule)

-             (error "Can't use `recentf-arrange-by-rule' itself here!")

-           (recentf-menu-customization-changed sym val))))

-

-(defun recentf-match-rule-p (matcher file-path)

-  "Return non-nil if FILE-PATH match the rule specified by MATCHER.

-See `recentf-arrange-rules' for details on MATCHER."

-  (if (stringp matcher)

-      (string-match matcher file-path)

-    (while (and (consp matcher)

-                (not (string-match (car matcher) file-path)))

-      (setq matcher (cdr matcher)))

-    matcher))

-

-(defun recentf-arrange-by-rule (l)

-  "Filter the list of menu-elements L to arrange them in sub-menus

-following rules in `recentf-arrange-rules'."

-  (let ((sub-menus-number (length recentf-arrange-rules)))

-    (if (> sub-menus-number 0)

-        (let ((sub-menus (apply 'vector

-                                (mapcar (function

-                                         (lambda (pair)

-                                           (list (car pair))))

-                                        recentf-arrange-rules)))

-              other-menu-elements index min-size)

-          (while l

-            (let* ((menu-element (car l))

-                   (file-path    (recentf-menu-element-value menu-element))

-                   (rules        recentf-arrange-rules)

-                   (found        nil))

-              (setq index 0)

-              (while (and (not found) rules)

-                (if (recentf-match-rule-p (cdar rules) file-path)

-                    (let ((sub-menu (aref sub-menus index)))

-                      (setq found t)

-                      (recentf-set-menu-element-value

-                       sub-menu

-                       (cons menu-element (recentf-menu-element-value sub-menu)))

-                      ))

-                (setq index (1+  index))

-                (setq rules (cdr rules)))

-              (or found

-                  (setq other-menu-elements

-                        (cons menu-element other-menu-elements)))

-              (setq l (cdr l))))

-          (setq index    0)

-          (setq l        nil)

-          (setq min-size (if (integerp recentf-arrange-by-rules-min-items)

-                             (max 0 recentf-arrange-by-rules-min-items)

-                           0))

-          (while (< index sub-menus-number)

-            (let* ((sub-menu          (aref sub-menus index))

-                   (sub-menu-title    (recentf-menu-element-item  sub-menu))

-                   (sub-menu-elements (recentf-menu-element-value sub-menu))

-                   (sub-menu-length   (length sub-menu-elements)))

-              (if (> sub-menu-length 0)

-                  (cond

-                   ((< sub-menu-length min-size)

-                    (setq other-menu-elements

-                          (nconc sub-menu-elements other-menu-elements)))

-                   ((>= sub-menu-length min-size)

-                    (recentf-set-menu-element-item

-                     sub-menu

-                     (format sub-menu-title sub-menu-length))

-                    (recentf-set-menu-element-value

-                     sub-menu

-                     (recentf-apply-menu-filter

-                      recentf-arrange-by-rule-subfilter

-                      (nreverse sub-menu-elements)))

-                    (setq   l (cons sub-menu l)))))

-              (setq index (1+ index))))

-          (if (and (stringp recentf-arrange-by-rule-others)

-                   other-menu-elements)

-              (setq l

-                    (nreverse

-                     (cons (recentf-make-menu-element

-                            (format recentf-arrange-by-rule-others

-                                    (length other-menu-elements))

-                            (recentf-apply-menu-filter

-                             recentf-arrange-by-rule-subfilter

-                             (nreverse other-menu-elements)))

-                           l)))

-            (setq l (nconc (nreverse l)

-                           (recentf-apply-menu-filter

-                            recentf-arrange-by-rule-subfilter

-                            (nreverse other-menu-elements)))))))

-    l))

-

-(defun recentf-build-mode-rules ()

-  "Convert `auto-mode-alist' to `recentf-arrange-rules' format."

-  (let ((case-fold-search recentf-case-fold-search)

-        (modes auto-mode-alist)

-        regexp mode rule-name rule rules)

-    (while modes

-      (setq regexp (caar modes))

-      (setq mode   (cdar modes))

-      (when (symbolp mode)

-        (setq rule-name (symbol-name mode))

-        (if (string-match "\\(.*\\)-mode$" rule-name)

-            (setq rule-name (match-string 1 rule-name)))

-        (setq rule-name (concat rule-name " (%d)"))

-        (setq rule (assoc rule-name rules))

-        (if rule

-            (setcdr rule (cons regexp (cdr rule)))

-          (setq rules (cons (list rule-name regexp) rules))))

-      (setq modes (cdr modes)))

-    ;; It is important to preserve auto-mode-alist order

-    ;; to ensure the right file <-> mode association

-    (nreverse rules)))

-         

-(defun recentf-arrange-by-mode (l)

-  "Filter the list of menu-elements L to build sub-menus for each

-major mode."

-  (let ((recentf-arrange-rules (recentf-build-mode-rules))

-        (recentf-arrange-by-rule-others "others (%d)"))

-    (recentf-arrange-by-rule l)))

-

-(defun recentf-build-dir-rules (l)

-  "Convert directories in the list of menu-elements L to rules in

-`recentf-arrange-rules' format."

-  (let (dirs)

-    (mapcar (function

-             (lambda (e)

-               (let ((dir (file-name-directory

-                           (recentf-menu-element-value e))))

-                 (or (member dir dirs)

-                     (setq dirs (cons dir dirs))))))

-            l)

-    (mapcar (function

-             (lambda (d)

-               (cons (concat d " (%d)")

-                     (concat "\\`" d))))

-            (nreverse (sort dirs 'string-lessp)))))

-

-(defun recentf-file-name-nondir (l)

-  "Filter the list of menu-elements L to show only filenames. This

-simplified version of `recentf-show-basenames' do not handle

-duplicates. It is used by `recentf-arrange-by-dir' as its

-`recentf-arrange-by-rule-subfilter'."

-  (mapcar (function

-           (lambda (e)

-             (recentf-make-menu-element

-              (file-name-nondirectory (recentf-menu-element-value e))

-              (recentf-menu-element-value e))))

-          l))

-

-(defun recentf-arrange-by-dir (l)

-  "Filter the list of menu-elements L to build sub-menus for each

-directory."

-  (let ((recentf-arrange-rules (recentf-build-dir-rules l))

-        (recentf-arrange-by-rule-subfilter 'recentf-file-name-nondir)

-        recentf-arrange-by-rule-others)

-    (nreverse (recentf-arrange-by-rule l))))

-

-(defvar recentf-filter-changer-state nil

-  "Used by `recentf-filter-changer' to hold its state.")

-

-(defcustom recentf-filter-changer-alist

-  '(

-    (recentf-arrange-by-mode . "*Files by Mode*")

-    (recentf-arrange-by-dir  . "*Files by Directory*")

-    (recentf-arrange-by-rule . "*Files by User Rule*")

-    )

-  "*List of filters managed by `recentf-filter-changer'.

-Each filter is defined by a pair (FILTER-FUN . FILTER-LBL) where:

-

-- - FILTER-FUN is the function that filters menu-elements

-- - FILTER-LBL is the menu item used to activate the filter"

-  :group 'recentf-filters

-  :type '(repeat (cons function string))

-  :set (lambda (sym val)

-         (setq recentf-filter-changer-state nil)

-         (recentf-menu-customization-changed sym val)))

-

-(defun recentf-filter-changer-goto-next ()

-  "Go to the next filter available (see `recentf-filter-changer')."

-  (and (consp recentf-filter-changer-state)

-       (setq recentf-filter-changer-state

-             (cdr recentf-filter-changer-state)))

-  (setq recentf-update-menu-p t))

-

-(defun recentf-filter-changer-get-current ()

-  "Get the current filter available (see `recentf-filter-changer')."

-  (if (null recentf-filter-changer-state)

-      (setq recentf-filter-changer-state recentf-filter-changer-alist))

-  (and (consp recentf-filter-changer-state)

-       (car recentf-filter-changer-state)))

-

-(defun recentf-filter-changer-get-next ()

-  "Get the next filter available (see `recentf-filter-changer')."

-  (let ((filters recentf-filter-changer-state))

-    (cond ((consp filters)

-           (setq filters (cdr filters))

-           (if (null filters)

-               (setq filters recentf-filter-changer-alist)))

-          (t

-           (setq filters recentf-filter-changer-alist)

-           (if (consp filters)

-               (setq filters (cdr filters)))))

-    (if (consp filters)

-        (car filters))))

-        

-(defun recentf-filter-changer (l)

-  "Manage a ring of filters. `recentf-filter-changer-alist' defines

-the filters in the ring. Actual filtering of L is delegated to the

-current filter in the ring. A filter menu item is displayed allowing

-to dynamically activate the next filter in the ring. If the filter

-ring is empty L is left unchanged."

-  (let ((current-filter-item (recentf-filter-changer-get-current))

-        (next-filter-item    (recentf-filter-changer-get-next)))

-    (when current-filter-item

-      (setq l (recentf-apply-menu-filter (car current-filter-item) l))

-      (if next-filter-item

-          (setq recentf-menu-filter-commands

-                (list (vector (cdr next-filter-item)

-                              '(recentf-filter-changer-goto-next)

-                              t)))))

-    l))

-

-;;;

-;;; Dialogs stuff

-;;;

-

-(defun recentf-cancel-dialog (&rest ignore)

-  "Cancel the current dialog. Used by `recentf-edit-list' and

-`recentf-open-files' dialogs."

-  (interactive)

-  (kill-buffer (current-buffer))

-  (message "Dialog canceled."))

-

-(defvar recentf-dialog-mode-map nil

-  "`recentf-dialog-mode' keymap.")

-

-(if recentf-dialog-mode-map

-    ()

-  (setq recentf-dialog-mode-map (make-sparse-keymap))

-  (define-key recentf-dialog-mode-map "q" 'recentf-cancel-dialog)

-  (set-keymap-parent recentf-dialog-mode-map widget-keymap))

-

-(defun recentf-dialog-mode ()

-  "Major mode used in recentf dialogs.

-

-These are the special commands of recentf-dialog-mode mode:

-    q -- cancel this dialog."

-  (interactive)

-  (setq major-mode 'recentf-dialog-mode)

-  (setq mode-name "recentf-dialog")

-  (use-local-map recentf-dialog-mode-map))

-

-;;;

-;;; Hooks and Commands

-;;;

-

-(defun recentf-add-file-hook ()

-  "Insert the name of the file just opened or written into `recentf-list'."

-  (and buffer-file-name (recentf-add-file buffer-file-name))

-  nil)

-

-(defun recentf-remove-file-hook ()

-  "When a buffer is killed remove a non readable file from `recentf-list'."

-  (and buffer-file-name (recentf-remove-if-non-readable buffer-file-name))

-  nil)

-

-(defun recentf-update-menu-hook ()

-  "Update the recentf menu from the current `recentf-list'."

-  (when recentf-update-menu-p

-    (condition-case nil

-        (progn

-          (setq recentf-update-menu-p nil)

-          (easy-menu-change recentf-menu-path

-                            recentf-menu-title

-                            (recentf-make-menu-items)

-                            recentf-menu-before))

-      (error nil))))

-

-(defun recentf-dump-variable (variable &optional limit)

-  "Insert a \"(setq VARIABLE value)\" in the current buffer. Optional

-argument LIMIT specifies a maximum length when VARIABLE value is a

-list (default to the full list)."

-  (let ((value (symbol-value variable)))

-    (insert (format "(setq %S\n      '(\n" variable))

-    (cond ((consp value)

-           (if (and (integerp limit) (> limit 0))

-               (setq value (recentf-trunc-list value limit)))

-           (mapcar (function

-                    (lambda (e)

-                      (insert (format "        %S\n" e))))

-                   value))

-          (t

-           (insert (format "        %S\n" value))))

-    (insert "        ))\n")

-    ))

-

-;;;###autoload

-(defun recentf-save-list ()

-  "Save the current `recentf-list' to the file `recentf-save-file'."

-  (interactive)

-  (with-temp-buffer

-    (erase-buffer)

-    (insert (format recentf-save-file-header (current-time-string)))

-    (recentf-dump-variable 'recentf-list recentf-max-saved-items)

-    (recentf-dump-variable 'recentf-filter-changer-state)

-    (if (file-writable-p recentf-save-file)

-        (write-region (point-min) (point-max) recentf-save-file))

-    (kill-buffer (current-buffer)))

-  nil)

-

-(defvar recentf-edit-selected-items nil

-  "Used by `recentf-edit-list' to hold the list of files to be deleted

-from `recentf-list'.")

-

-(defun recentf-edit-list-action (widget &rest ignore)

-  "Checkbox widget action used by `recentf-edit-list' to select/unselect a file."

-  (let ((value (widget-get widget ':tag)))

-    ;; if value is already in the selected items

-    (if (memq value recentf-edit-selected-items)

-        ;; then remove it

-        (progn

-          (setq recentf-edit-selected-items

-                (delq value recentf-edit-selected-items))

-          (message "%s removed from selection." value))

-      ;; else add it

-      (progn

-        (setq recentf-edit-selected-items

-              (nconc (list value) recentf-edit-selected-items))

-        (message "%s added to selection." value)))))

-  

-;;;###autoload

-(defun recentf-edit-list ()

-  "Allow the user to edit the files that are kept in the recent list."

-  (interactive)

-  (with-current-buffer (get-buffer-create (concat "*" recentf-menu-title " - Edit list*"))

-    (switch-to-buffer (current-buffer))

-    (kill-all-local-variables)

-    (let ((inhibit-read-only t))

-      (erase-buffer))

-    (let ((all (overlay-lists)))

-      ;; Delete all the overlays.

-      (mapcar 'delete-overlay (car all))

-      (mapcar 'delete-overlay (cdr all)))

-    (setq recentf-edit-selected-items nil)

-    ;; Insert the dialog header

-    (widget-insert "Select the files to be deleted from the 'recentf-list'.\n\n")

-    (widget-insert "Click on Ok to update the list. ")

-    (widget-insert "Click on Cancel or type \"q\" to quit.\n")

-    ;; Insert the list of files as checkboxes

-    (mapcar (function

-             (lambda (item)

-               (widget-create 'checkbox

-                              :value nil ; unselected checkbox

-                              :format "\n %[%v%]  %t"

-                              :tag item

-                              :notify 'recentf-edit-list-action)))

-            recentf-list)

-    (widget-insert "\n\n")

-    ;; Insert the Ok button

-    (widget-create 'push-button

-                   :notify (lambda (&rest ignore)

-                             (if recentf-edit-selected-items

-                                 (progn (kill-buffer (current-buffer))

-                                        (mapcar (function

-                                                 (lambda (item)

-                                                   (setq recentf-list

-                                                         (delq item recentf-list))))

-                                                recentf-edit-selected-items)

-                                        (message "%S file(s) removed from the list"

-                                                 (length recentf-edit-selected-items))

-                                        (setq recentf-update-menu-p t))

-                               (message "No file selected.")))

-                   "Ok")

-    (widget-insert " ")

-    ;; Insert the Cancel button

-    (widget-create 'push-button

-                   :notify 'recentf-cancel-dialog

-                   "Cancel")

-    (recentf-dialog-mode)

-    (widget-setup)

-    (goto-char (point-min))))

-

-;;;###autoload

-(defun recentf-cleanup ()

-  "Remove all non-readable and excluded files from `recentf-list'."

-  (interactive)

-  (let ((count (length recentf-list)))

-    (setq recentf-list

-          (delq nil

-                (mapcar (function

-                         (lambda (filename)

-                           (and (file-readable-p filename)

-                                (recentf-include-p filename)

-                                filename)))

-                        recentf-list)))

-    (setq count (- count (length recentf-list)))

-    (message "%s removed from the list"

-             (cond ((= count 0) "No file")

-                   ((= count 1) "One file")

-                   (t (format "%d files" count)))))

-  (setq recentf-update-menu-p t))

-

-(defun recentf-open-files-action (widget &rest ignore)

-  "Button widget action used by `recentf-open-files' to open a file."

-  (kill-buffer (current-buffer))

-  (funcall recentf-menu-action (widget-value widget)))

-

-(defvar recentf-open-files-item-shift ""

-  "String used by `recentf-open-files' to shift right sub-menu

-items.")

-

-(defun recentf-open-files-item (menu-element)

-  "Function called by `recentf-open-files' to insert a menu-element

-item in the current interaction buffer."

-  (let ((menu-item (car menu-element))

-        (file-path (cdr menu-element)))

-    (if (consp file-path)               ; This is a sub-menu

-        (let* ((shift recentf-open-files-item-shift)

-               (recentf-open-files-item-shift (concat shift "  ")))

-          (widget-create 'item

-                         :tag menu-item

-                         :sample-face 'bold

-                         :format (concat shift "%{%t%}:\n"))

-          (mapcar 'recentf-open-files-item

-                  file-path)

-          (widget-insert "\n"))

-      (widget-create 'push-button

-                     :button-face 'default

-                     :tag menu-item

-                     :help-echo (concat "Open " file-path)

-                     :format (concat recentf-open-files-item-shift "%[%t%]")

-                     :notify 'recentf-open-files-action

-                     file-path)

-      (widget-insert "\n"))))

-

-;;;###autoload

-(defun recentf-open-files (&optional files buffer-name)

-  "Open a buffer that allows the user to choose a file to open from

-the list of recently opened files. The optional argument FILES may be

-used to specify the list, otherwise recentf-list is used. The optional

-argument BUFFER-NAME specifies which buffer to use for the interaction."

-  (interactive)

-  (if (null files)

-      (setq files recentf-list))

-  (if (null buffer-name)

-      (setq buffer-name (concat "*" recentf-menu-title "*")))

-  (with-current-buffer (get-buffer-create buffer-name)

-    (switch-to-buffer (current-buffer))

-    (kill-all-local-variables)

-    (let ((inhibit-read-only t))

-      (erase-buffer))

-    (let ((all (overlay-lists)))

-      ;; Delete all the overlays.

-      (mapcar 'delete-overlay (car all))

-      (mapcar 'delete-overlay (cdr all)))

-    ;; Insert the dialog header

-    (widget-insert "Click on a file to open it. ")

-    (widget-insert "Click on Cancel or type \"q\" to quit.\n\n" )

-    ;; Insert the list of files as buttons

-    (let ((recentf-open-files-item-shift ""))

-      (mapcar 'recentf-open-files-item

-              (recentf-apply-menu-filter

-               recentf-menu-filter

-               (mapcar 'recentf-make-default-menu-element files))))

-    (widget-insert "\n")

-    ;; Insert the Cancel button

-    (widget-create 'push-button

-                   :notify 'recentf-cancel-dialog

-                   "Cancel")

-    (recentf-dialog-mode)

-    (widget-setup)

-    (goto-char (point-min))))

-

-;;;###autoload

-(defun recentf-open-more-files ()

-  "Allow the user to open files that are not in the menu."

-  (interactive)

-  (recentf-open-files (nthcdr recentf-max-menu-items recentf-list)

-                      (concat "*" recentf-menu-title " - More*")))

-

-;;;###autoload

-(defun recentf-mode (&optional arg)

-  "Toggle recentf mode.

-With prefix ARG, turn recentf mode on if and only if ARG is positive.

-Returns the new status of recentf mode (non-nil means on).

-

-When recentf mode is enabled, it maintains a menu for visiting files that

-were operated on recently."

-  (interactive "P")

-  (let ((on-p (if arg

-                  (> (prefix-numeric-value arg) 0)

-                (not recentf-mode))))

-    (if on-p

-        (unless recentf-initialized-p

-          (setq recentf-initialized-p t)

-          (if (file-readable-p recentf-save-file)

-              (load-file recentf-save-file))

-          (setq recentf-update-menu-p t)

-          (add-hook 'find-file-hooks       'recentf-add-file-hook)

-          (add-hook 'write-file-hooks      'recentf-add-file-hook)

-          (add-hook 'menu-bar-update-hook  'recentf-update-menu-hook)

-          (add-hook 'kill-emacs-hook       'recentf-save-list))

-      (when recentf-initialized-p

-        (setq recentf-initialized-p nil)

-        (recentf-save-list)

-        (easy-menu-remove-item nil recentf-menu-path recentf-menu-title)

-        (remove-hook 'find-file-hooks       'recentf-add-file-hook)

-        (remove-hook 'write-file-hooks      'recentf-add-file-hook)

-        (remove-hook 'menu-bar-update-hook  'recentf-update-menu-hook)

-        (remove-hook 'kill-emacs-hook       'recentf-save-list)))

-    (setq recentf-mode on-p)))

-

-(provide 'recentf)

-

-(run-hooks 'recentf-load-hook)

-

-;;; recentf.el ends here.

+;; recentf.el --- setup a menu of recently opened files
+
+;; Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+
+;; Author: David Ponce <david@dponce.com>
+;; Created: July 19 1999
+;; Keywords: customization
+
+;; This file is part of GNU Emacs.
+
+;; 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.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; 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.
+
+;;; Commentary:
+
+;; This package maintains a menu for visiting files that were operated
+;; on recently. When enabled a new "Open Recent" submenu is displayed
+;; in the "Files" menu. The recent files list is automatically saved
+;; across Emacs sessions.  You can customize the number of recent
+;; files displayed, the location of the menu and others options (see
+;; the source code for details).  To install and use, put the file on
+;; your Emacs-Lisp load path and add the following into your ~/.emacs
+;; startup file:
+;;
+;;  (require 'recentf)
+;;  (recentf-mode 1) 
+
+;;; Code:
+
+(require 'easymenu)
+(require 'wid-edit)
+
+(defconst recentf-save-file-header
+  ";;; Automatically generated by `recentf' on %s.\n"
+  "Header to be written into the `recentf-save-file'.")
+
+(defvar recentf-list nil
+  "List of recently opened files.")
+
+(defvar recentf-update-menu-p t
+  "Non-nil if the recentf menu must be updated.")
+
+(defvar recentf-initialized-p nil
+  "Non-nil if recentf already initialized.")
+
+;; IMPORTANT: This function must be defined before the following defcustoms
+;; because it is used in their :set clause. To avoid byte-compiler warnings
+;; the `symbol-value' function is used to access the `recentf-menu-path'
+;; and `recentf-menu-title' values.
+(defun recentf-menu-customization-changed (sym val)
+  "Function called when menu customization has changed.
+It removes the recentf menu and forces its complete redrawing."
+  (when recentf-initialized-p
+    (easy-menu-remove-item nil 
+                           (symbol-value 'recentf-menu-path)
+                           (symbol-value 'recentf-menu-title))
+    (setq recentf-update-menu-p t))
+  (custom-set-default sym val))
+
+(defgroup recentf nil
+  "Maintain a menu of recently opened files."
+  :version "21.1"
+  :group 'files)
+
+(defgroup recentf-filters nil
+  "Group to customize recentf menu filters.
+You should define the options of your own filters in this group."
+  :group 'recentf)
+
+(defcustom recentf-max-saved-items 20
+  "*Maximum number of items saved to `recentf-save-file'."
+  :group 'recentf
+  :type 'integer)
+
+(defcustom recentf-save-file (expand-file-name "~/.recentf")
+  "*File to save `recentf-list' into."
+  :group 'recentf
+  :type 'file)
+
+(defcustom recentf-exclude nil
+  "*List of regexps for filenames excluded from `recentf-list'."
+  :group 'recentf
+  :type '(repeat regexp))
+
+(defcustom recentf-menu-title "Open Recent"
+  "*Name of the recentf menu."
+  :group 'recentf
+  :type 'string
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-menu-path '("files")
+  "*Path where to add the recentf menu.
+If nil add it at top-level (see also `easy-menu-change')."
+  :group 'recentf
+  :type '(choice (const :tag "Top Level" nil)
+                 (sexp :tag "Menu Path"))
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-menu-before "open-file"
+  "*Name of the menu before which the recentf menu will be added.
+If nil add it at end of menu (see also `easy-menu-change')."
+  :group 'recentf
+  :type '(choice (string :tag "Name")
+                 (const :tag "Last" nil))
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-menu-action 'recentf-find-file
+  "*Function to invoke with a filename item of the recentf menu.
+The default action `recentf-find-file' calls `find-file' to edit an
+existing file.  If the file does not exist or is not readable, it is
+not edited and its name is removed from `recentf-list'. You can use
+`find-file' instead to open non-existing files and keep them in the
+list of recently opened files."
+  :group 'recentf
+  :type 'function
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-max-menu-items 10
+  "*Maximum number of items in the recentf menu."
+  :group 'recentf
+  :type 'integer
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-menu-filter nil
+  "*Function used to filter files displayed in the recentf menu.
+Nil means no filter.  The following functions are predefined:
+
+- - `recentf-sort-ascending' to sort menu items in ascending order.
+- - `recentf-sort-descending' to sort menu items in descending order.
+- - `recentf-sort-basenames-ascending' to sort file names in descending order.
+- - `recentf-sort-basenames-descending' to sort file names in descending order.
+- - `recentf-sort-directories-ascending' to sort directories in ascending order.
+- - `recentf-sort-directories-descending' to sort directories in descending order.
+- - `recentf-show-basenames' to show file names (no directories) in menu items.
+- - `recentf-show-basenames-ascending' to show file names in ascending order.
+- - `recentf-show-basenames-descending' to show file names in descending order.
+- - `recentf-relative-filter' to show file names relative to `default-directory'.
+- - `recentf-arrange-by-rule' to show sub-menus following user defined rules.
+- - `recentf-arrange-by-mode' to show a sub-menu for each major mode.
+- - `recentf-arrange-by-dir' to show a sub-menu for each directory.
+- - `recentf-filter-changer' to manage a ring of filters.
+
+The filter function is called with one argument, the list of menu elements
+used to build the menu and must return a new list of menu elements (see
+`recentf-make-menu-element' for menu element form)."
+  :group 'recentf
+  :type 'function
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-menu-append-commands-p t
+  "*If not-nil command items are appended to the menu."
+  :group 'recentf
+  :type 'boolean
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-keep-non-readable-files-p nil
+  "*If nil (default), non-readable files are not kept in `recentf-list'."
+  :group 'recentf
+  :type 'boolean
+  :require 'recentf
+  :initialize 'custom-initialize-default
+  :set (lambda (sym val)
+         (if val
+             (remove-hook 'kill-buffer-hook 'recentf-remove-file-hook)
+           (add-hook 'kill-buffer-hook 'recentf-remove-file-hook))
+         (custom-set-default sym val)))
+
+(defcustom recentf-mode nil
+  "Toggle recentf mode.
+When recentf mode is enabled, it maintains a menu for visiting files that
+were operated on recently.
+Setting this variable directly does not take effect;
+use either \\[customize] or the function `recentf-mode'."
+  :set (lambda (symbol value)
+         (recentf-mode (or value 0)))
+  :initialize 'custom-initialize-default
+  :type 'boolean
+  :group 'recentf
+  :require 'recentf)
+
+(defcustom recentf-load-hook nil
+   "*Normal hook run at end of loading the `recentf' package."
+  :group 'recentf
+  :type 'hook)
+
+;;;
+;;; Common functions
+;;;
+(defconst recentf-case-fold-search
+  (memq system-type '(vax-vms windows-nt))
+  "Non-nil if recentf searches and matches should ignore case.")
+
+(defun recentf-include-p (filename)
+  "Return t if FILENAME matches none of the `recentf-exclude' regexps."
+  (let ((case-fold-search recentf-case-fold-search)
+        (rl recentf-exclude))
+    (while (and rl (not (string-match (car rl) filename)))
+      (setq rl (cdr rl)))
+    (null rl)))
+
+(defun recentf-add-file (filename)
+  "Add or move FILENAME at the beginning of `recentf-list'.
+Does nothing if FILENAME matches one of the `recentf-exclude' regexps."
+  (let ((filename (expand-file-name filename)))
+    (when (recentf-include-p filename)
+      (setq recentf-list (cons filename (delete filename recentf-list)))
+      (setq recentf-update-menu-p t))))
+
+(defun recentf-remove-if-non-readable (filename)
+  "Remove FILENAME from `recentf-list' if not readable."
+  (unless (file-readable-p filename)
+    (setq recentf-list (delete filename recentf-list))
+    (setq recentf-update-menu-p t)))
+
+(defun recentf-find-file (filename)
+  "Edit file FILENAME using `find-file'.
+If FILENAME is not readable it is removed from `recentf-list'."
+  (if (file-readable-p filename)
+      (find-file filename)
+    (progn
+      (message "File `%s' not found." filename)
+      (setq recentf-list (delete filename recentf-list))
+      (setq recentf-update-menu-p t))))
+
+(defun recentf-trunc-list (l n)
+  "Return a list of the first N elements of L."
+  (let ((lh nil))
+    (while (and l (> n 0))
+      (setq lh (cons (car l) lh))
+      (setq n (1- n))
+      (setq l (cdr l)))
+    (nreverse lh)))
+
+(defun recentf-elements (n)
+  "Return a list of the first N elements of `recentf-list'."
+  (recentf-trunc-list recentf-list n))
+
+(defun recentf-make-menu-element (menu-item menu-value)
+  "Create a new menu-element.
+
+A menu element is a pair (MENU-ITEM . MENU-VALUE) where:
+
+- - MENU-ITEM  is the menu item string displayed.
+- - MENU-VALUE is the path used to open the file when the
+               corresponding MENU-ITEM is selected. Or it is
+               a pair (SUB-MENU-TITLE . MENU-ELEMENTS) where
+               SUB-MENU-TITLE is a sub-menu title and
+               MENU-ELEMENTS is the list of menu elements in
+               the sub-menu."
+  (cons menu-item menu-value))
+
+(defun recentf-menu-element-item (e)
+  "Return the item part of the menu-element E."
+  (car e))
+
+(defun recentf-menu-element-value (e)
+  "Return the value part of the menu-element E."
+  (cdr e))
+
+(defun recentf-set-menu-element-item (e item)
+  "Change the item part of menu-element E to ITEM."
+  (setcar e item))
+
+(defun recentf-set-menu-element-value (e value)
+  "Change the value part of menu-element E to VALUE."
+  (setcdr e value))
+
+(defun recentf-sub-menu-element-p (e)
+  "Return non-nil if menu-element E defines a sub-menu."
+  (consp (recentf-menu-element-value e)))
+
+(defun recentf-make-default-menu-element (file-path)
+  "Make a new default menu element (MENU-ITEM . MENU-VALUE) for the
+given recent file path FILE-PATH. MENU-ITEM and MENU-VALUE are set to
+FILE-PATH. See also `recentf-make-menu-element'."
+  (recentf-make-menu-element file-path file-path))
+
+(defun recentf-menu-elements (n)
+  "Return a list of the first N default menu elements from
+`recentf-list'. See also `recentf-make-default-menu-element'."
+  (mapcar 'recentf-make-default-menu-element
+          (recentf-elements n)))
+
+(defun recentf-apply-menu-filter (filter l)
+  "Convenient funtion to apply the function FILTER to the list of
+menu-elements L. It takes care of sub-menu elements in L and
+recursively apply FILTER to them. It is guarantee than FILTER receives
+only a list of single menu-elements (no sub-menu)."
+  (if (and (functionp filter) l)
+      (let ((case-fold-search recentf-case-fold-search)
+            menu-element sub-menu-elements single-elements)
+        ;; split L in two sub-listes:
+        ;;   one of sub-menus elements and
+        ;;   one of single menu elements
+        (while l
+          (setq menu-element (car l))
+          (if (recentf-sub-menu-element-p menu-element)
+              (setq sub-menu-elements
+                    (cons menu-element sub-menu-elements))
+            (setq single-elements
+                  (cons menu-element single-elements)))
+          (setq l (cdr l)))
+        ;; apply FILTER to the list of single menu elements
+        (if single-elements
+            (setq single-elements (funcall filter
+                                           (nreverse single-elements))))
+        ;; apply FILTER to sub-menu menu element list
+        (setq l sub-menu-elements)
+        (setq sub-menu-elements nil)
+        (while l
+          (setq menu-element (car l))
+          (recentf-set-menu-element-value
+           menu-element
+           (recentf-apply-menu-filter
+            filter
+            (recentf-menu-element-value menu-element)))
+          (setq sub-menu-elements (cons menu-element sub-menu-elements))
+          (setq l (cdr l)))
+        ;; build and return the new filtered menu element list
+        (nconc sub-menu-elements single-elements))
+    l))
+
+(defvar recentf-menu-items-for-commands
+  (list ["Cleanup list" recentf-cleanup t]
+        ["Edit list..." recentf-edit-list t]
+        ["Save list now" recentf-save-list t]
+        (vector "Recentf Options..." '(customize-group "recentf") t))
+  "List of menu items for recentf commands.")
+
+(defvar recentf-menu-filter-commands nil
+  "This variable can be used by menu filters to setup their own command menu.
+
+If non-nil it must contain a list of valid menu-items to be appended
+to the recent file list part of the menu.  Before calling a menu
+filter function this variable is reset to nil.")
+
+(defun recentf-make-menu-items ()
+  "Make menu items from `recentf-list'."
+  (setq recentf-menu-filter-commands nil)
+  (let ((file-items
+         (mapcar 'recentf-make-menu-item
+                 (recentf-apply-menu-filter
+                  recentf-menu-filter
+                  (recentf-menu-elements recentf-max-menu-items)))))
+    (append (or file-items (list ["No files" t nil]))
+            (and (< recentf-max-menu-items (length recentf-list))
+                 (list ["More..." recentf-open-more-files t]))
+            (and recentf-menu-filter-commands
+                 (cons "---"
+                       recentf-menu-filter-commands))
+            (and recentf-menu-append-commands-p
+                 (cons "---"
+                       recentf-menu-items-for-commands)))))
+
+(defun recentf-make-menu-item (menu-element)
+  "Make a menu item from a menu element (see `recentf-make-menu-element')."
+  (let ((menu-item  (recentf-menu-element-item  menu-element))
+        (menu-value (recentf-menu-element-value menu-element)))
+    (if (recentf-sub-menu-element-p menu-element)
+        (cons menu-item (mapcar 'recentf-make-menu-item menu-value))
+      (vector menu-item
+              (list recentf-menu-action menu-value)
+              t))))
+
+;;;
+;;; Predefined menu filter functions
+;;;
+
+(defun recentf-sort-ascending (l)
+  "Sort the list of menu elements L in ascending order.
+The MENU-ITEM part of each menu element is compared."
+  (sort (copy-sequence l)
+        (function
+         (lambda (e1 e2)
+           (string-lessp (recentf-menu-element-item e1)
+                         (recentf-menu-element-item e2))))))
+
+(defun recentf-sort-descending (l)
+  "Sort the list of menu elements L in descending order.
+The MENU-ITEM part of each menu element is compared."
+  (sort (copy-sequence l)
+        (function
+         (lambda (e1 e2)
+           (string-lessp (recentf-menu-element-item e2)
+                         (recentf-menu-element-item e1))))))
+
+(defun recentf-sort-basenames-ascending (l)
+  "Sort the list of menu elements L in ascending order.
+Only file names (without directories) are compared."
+  (sort (copy-sequence l)
+        (function
+         (lambda (e1 e2)
+           (string-lessp
+            (file-name-nondirectory (recentf-menu-element-value e1))
+            (file-name-nondirectory (recentf-menu-element-value e2)))))))
+
+(defun recentf-sort-basenames-descending (l)
+  "Sort the list of menu elements L in descending order.
+Only file names (without directories) are compared."
+  (sort (copy-sequence l)
+        (function
+         (lambda (e1 e2)
+           (string-lessp
+            (file-name-nondirectory (recentf-menu-element-value e2))
+            (file-name-nondirectory (recentf-menu-element-value e1)))))))
+
+(defun recentf-directory-compare (p1 p2)
+  "Compare directories then filenames in pathes P1 and P2 and return
+non-nil if P1 is less than P2."
+  (let ((d1 (file-name-directory    p1))
+        (f1 (file-name-nondirectory p1))
+        (d2 (file-name-directory    p2))
+        (f2 (file-name-nondirectory p2)))
+    (if (string= d1 d2)
+        (string-lessp f1 f2)
+      (string-lessp d1 d2))))
+
+(defun recentf-sort-directories-ascending (l)
+  "Sort the list of menu elements L in ascending order.
+Compares directories then filenames to order the list."
+  (sort (copy-sequence l)
+        (function
+         (lambda (e1 e2)
+           (recentf-directory-compare (recentf-menu-element-value e1)
+                                      (recentf-menu-element-value e2))))))
+
+(defun recentf-sort-directories-descending (l)
+  "Sort the list of menu elements L in descending order.
+Compares directories then filenames to order the list."
+  (sort (copy-sequence l)
+        (function
+         (lambda (e1 e2)
+           (recentf-directory-compare (recentf-menu-element-value e2)
+                                      (recentf-menu-element-value e1))))))
+
+(defun recentf-show-basenames (l)
+  "Filter the list of menu elements L to show only file names (no directories)
+in the menu. When file names are duplicated their directory component is added."
+  (let ((names  (mapcar (function
+                         (lambda (item)
+                           (file-name-nondirectory
+                            (recentf-menu-element-value item))))
+                        l))
+        (dirs   (mapcar (function
+                         (lambda (item)
+                           (file-name-directory
+                            (recentf-menu-element-value item))))
+                        l))
+        (pathes (mapcar 'recentf-menu-element-value l))
+        (pos    -1)
+        item filtered-items filtered-list)
+    (while names
+      (setq item  (car names))
+      (setq names (cdr names))
+      (setq pos   (1+ pos))
+      (setq filtered-list
+            (cons (recentf-make-menu-element
+                   (if (or (member item names) (member item filtered-items))
+                       (concat item " (" (nth pos dirs) ")")
+                     item)
+                   (nth pos pathes))
+                  filtered-list))
+      (setq filtered-items (cons item filtered-items)))
+    (nreverse filtered-list)))
+
+(defun recentf-show-basenames-ascending (l)
+  "Filter the list of menu elements L to show only file names in the menu,
+sorted in ascending order. This filter combines the `recentf-sort-basenames-ascending'
+and `recentf-show-basenames' filters."
+  (recentf-show-basenames (recentf-sort-basenames-ascending l)))
+
+(defun recentf-show-basenames-descending (l)
+  "Filter the list of menu elements L to show only file names in the menu,
+sorted in descending order. This filter combines the `recentf-sort-basenames-descending'
+and `recentf-show-basenames' filters."
+  (recentf-show-basenames (recentf-sort-basenames-descending l)))
+
+(defun recentf-relative-filter (l)
+  "Filter the list of `recentf-menu-elements' L to show filenames
+relative to `default-directory'."
+  (setq recentf-update-menu-p t)        ; force menu update
+  (mapcar (function
+           (lambda (menu-element)
+             (let* ((ful-path (recentf-menu-element-value menu-element))
+                    (rel-path (file-relative-name ful-path)))
+               (if (string-match "^\\.\\." rel-path)
+                   menu-element
+                 (recentf-make-menu-element rel-path ful-path)))))
+          l))
+
+(defcustom recentf-arrange-rules
+  '(
+    ("Elisp files (%d)" ".\\.el$")
+    ("Java files (%d)"  ".\\.java$")
+    ("C/C++ files (%d)" "c\\(pp\\)?$")
+    )
+  "*List of rules used by `recentf-arrange-by-rule' to build sub-menus.
+A rule is a pair (SUB-MENU-TITLE . MATCHER). SUB-MENU-TITLE is the
+displayed title of the sub-menu where a '%d' `format' pattern is
+replaced by the number of items in the sub-menu. MATCHER is a regexp
+or a list of regexps. Items matching one of the regular expressions in
+MATCHER are added to the corresponding sub-menu."
+  :group 'recentf-filters
+  :type '(repeat (cons string (repeat regexp)))
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-arrange-by-rule-others "Other files (%d)"
+  "*Title of the `recentf-arrange-by-rule' sub-menu where items that
+don't match any `recentf-arrange-rules' are displayed. If nil
+these items are displayed in the main recent files menu. A '%d'
+`format' pattern in the title is replaced by the number of items in
+the sub-menu."
+  :group 'recentf-filters
+  :type '(choice (const  :tag "Main menu" nil)
+                 (string :tag "Title"))
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-arrange-by-rules-min-items 0
+  "*Minimum number of items in a `recentf-arrange-by-rule' sub-menu.
+If the number of items in a sub-menu is less than this value the
+corresponding sub-menu items are displayed in the main recent files
+menu or in the `recentf-arrange-by-rule-others' sub-menu if
+defined."
+  :group 'recentf-filters
+  :type 'number
+  :set 'recentf-menu-customization-changed)
+
+(defcustom recentf-arrange-by-rule-subfilter nil
+  "*Function used by `recentf-arrange-by-rule' to filter sub-menu elements.
+Nil means no filter. See also `recentf-menu-filter'. You can't use
+`recentf-arrange-by-rule' itself here!"
+  :group 'recentf-filters
+  :type 'function
+  :set (lambda (sym val)
+         (if (eq val 'recentf-arrange-by-rule)
+             (error "Can't use `recentf-arrange-by-rule' itself here!")
+           (recentf-menu-customization-changed sym val))))
+
+(defun recentf-match-rule-p (matcher file-path)
+  "Return non-nil if FILE-PATH match the rule specified by MATCHER.
+See `recentf-arrange-rules' for details on MATCHER."
+  (if (stringp matcher)
+      (string-match matcher file-path)
+    (while (and (consp matcher)
+                (not (string-match (car matcher) file-path)))
+      (setq matcher (cdr matcher)))
+    matcher))
+
+(defun recentf-arrange-by-rule (l)
+  "Filter the list of menu-elements L to arrange them in sub-menus
+following rules in `recentf-arrange-rules'."
+  (let ((sub-menus-number (length recentf-arrange-rules)))
+    (if (> sub-menus-number 0)
+        (let ((sub-menus (apply 'vector
+                                (mapcar (function
+                                         (lambda (pair)
+                                           (list (car pair))))
+                                        recentf-arrange-rules)))
+              other-menu-elements index min-size)
+          (while l
+            (let* ((menu-element (car l))
+                   (file-path    (recentf-menu-element-value menu-element))
+                   (rules        recentf-arrange-rules)
+                   (found        nil))
+              (setq index 0)
+              (while (and (not found) rules)
+                (if (recentf-match-rule-p (cdar rules) file-path)
+                    (let ((sub-menu (aref sub-menus index)))
+                      (setq found t)
+                      (recentf-set-menu-element-value
+                       sub-menu
+                       (cons menu-element (recentf-menu-element-value sub-menu)))
+                      ))
+                (setq index (1+  index))
+                (setq rules (cdr rules)))
+              (or found
+                  (setq other-menu-elements
+                        (cons menu-element other-menu-elements)))
+              (setq l (cdr l))))
+          (setq index    0)
+          (setq l        nil)
+          (setq min-size (if (integerp recentf-arrange-by-rules-min-items)
+                             (max 0 recentf-arrange-by-rules-min-items)
+                           0))
+          (while (< index sub-menus-number)
+            (let* ((sub-menu          (aref sub-menus index))
+                   (sub-menu-title    (recentf-menu-element-item  sub-menu))
+                   (sub-menu-elements (recentf-menu-element-value sub-menu))
+                   (sub-menu-length   (length sub-menu-elements)))
+              (if (> sub-menu-length 0)
+                  (cond
+                   ((< sub-menu-length min-size)
+                    (setq other-menu-elements
+                          (nconc sub-menu-elements other-menu-elements)))
+                   ((>= sub-menu-length min-size)
+                    (recentf-set-menu-element-item
+                     sub-menu
+                     (format sub-menu-title sub-menu-length))
+                    (recentf-set-menu-element-value
+                     sub-menu
+                     (recentf-apply-menu-filter
+                      recentf-arrange-by-rule-subfilter
+                      (nreverse sub-menu-elements)))
+                    (setq   l (cons sub-menu l)))))
+              (setq index (1+ index))))
+          (if (and (stringp recentf-arrange-by-rule-others)
+                   other-menu-elements)
+              (setq l
+                    (nreverse
+                     (cons (recentf-make-menu-element
+                            (format recentf-arrange-by-rule-others
+                                    (length other-menu-elements))
+                            (recentf-apply-menu-filter
+                             recentf-arrange-by-rule-subfilter
+                             (nreverse other-menu-elements)))
+                           l)))
+            (setq l (nconc (nreverse l)
+                           (recentf-apply-menu-filter
+                            recentf-arrange-by-rule-subfilter
+                            (nreverse other-menu-elements)))))))
+    l))
+
+(defun recentf-build-mode-rules ()
+  "Convert `auto-mode-alist' to `recentf-arrange-rules' format."
+  (let ((case-fold-search recentf-case-fold-search)
+        (modes auto-mode-alist)
+        regexp mode rule-name rule rules)
+    (while modes
+      (setq regexp (caar modes))
+      (setq mode   (cdar modes))
+      (when (symbolp mode)
+        (setq rule-name (symbol-name mode))
+        (if (string-match "\\(.*\\)-mode$" rule-name)
+            (setq rule-name (match-string 1 rule-name)))
+        (setq rule-name (concat rule-name " (%d)"))
+        (setq rule (assoc rule-name rules))
+        (if rule
+            (setcdr rule (cons regexp (cdr rule)))
+          (setq rules (cons (list rule-name regexp) rules))))
+      (setq modes (cdr modes)))
+    ;; It is important to preserve auto-mode-alist order
+    ;; to ensure the right file <-> mode association
+    (nreverse rules)))
+         
+(defun recentf-arrange-by-mode (l)
+  "Filter the list of menu-elements L to build sub-menus for each
+major mode."
+  (let ((recentf-arrange-rules (recentf-build-mode-rules))
+        (recentf-arrange-by-rule-others "others (%d)"))
+    (recentf-arrange-by-rule l)))
+
+(defun recentf-build-dir-rules (l)
+  "Convert directories in the list of menu-elements L to rules in
+`recentf-arrange-rules' format."
+  (let (dirs)
+    (mapcar (function
+             (lambda (e)
+               (let ((dir (file-name-directory
+                           (recentf-menu-element-value e))))
+                 (or (member dir dirs)
+                     (setq dirs (cons dir dirs))))))
+            l)
+    (mapcar (function
+             (lambda (d)
+               (cons (concat d " (%d)")
+                     (concat "\\`" d))))
+            (nreverse (sort dirs 'string-lessp)))))
+
+(defun recentf-file-name-nondir (l)
+  "Filter the list of menu-elements L to show only filenames. This
+simplified version of `recentf-show-basenames' do not handle
+duplicates. It is used by `recentf-arrange-by-dir' as its
+`recentf-arrange-by-rule-subfilter'."
+  (mapcar (function
+           (lambda (e)
+             (recentf-make-menu-element
+              (file-name-nondirectory (recentf-menu-element-value e))
+              (recentf-menu-element-value e))))
+          l))
+
+(defun recentf-arrange-by-dir (l)
+  "Filter the list of menu-elements L to build sub-menus for each
+directory."
+  (let ((recentf-arrange-rules (recentf-build-dir-rules l))
+        (recentf-arrange-by-rule-subfilter 'recentf-file-name-nondir)
+        recentf-arrange-by-rule-others)
+    (nreverse (recentf-arrange-by-rule l))))
+
+(defvar recentf-filter-changer-state nil
+  "Used by `recentf-filter-changer' to hold its state.")
+
+(defcustom recentf-filter-changer-alist
+  '(
+    (recentf-arrange-by-mode . "*Files by Mode*")
+    (recentf-arrange-by-dir  . "*Files by Directory*")
+    (recentf-arrange-by-rule . "*Files by User Rule*")
+    )
+  "*List of filters managed by `recentf-filter-changer'.
+Each filter is defined by a pair (FILTER-FUN . FILTER-LBL) where:
+
+- - FILTER-FUN is the function that filters menu-elements
+- - FILTER-LBL is the menu item used to activate the filter"
+  :group 'recentf-filters
+  :type '(repeat (cons function string))
+  :set (lambda (sym val)
+         (setq recentf-filter-changer-state nil)
+         (recentf-menu-customization-changed sym val)))
+
+(defun recentf-filter-changer-goto-next ()
+  "Go to the next filter available (see `recentf-filter-changer')."
+  (and (consp recentf-filter-changer-state)
+       (setq recentf-filter-changer-state
+             (cdr recentf-filter-changer-state)))
+  (setq recentf-update-menu-p t))
+
+(defun recentf-filter-changer-get-current ()
+  "Get the current filter available (see `recentf-filter-changer')."
+  (if (null recentf-filter-changer-state)
+      (setq recentf-filter-changer-state recentf-filter-changer-alist))
+  (and (consp recentf-filter-changer-state)
+       (car recentf-filter-changer-state)))
+
+(defun recentf-filter-changer-get-next ()
+  "Get the next filter available (see `recentf-filter-changer')."
+  (let ((filters recentf-filter-changer-state))
+    (cond ((consp filters)
+           (setq filters (cdr filters))
+           (if (null filters)
+               (setq filters recentf-filter-changer-alist)))
+          (t
+           (setq filters recentf-filter-changer-alist)
+           (if (consp filters)
+               (setq filters (cdr filters)))))
+    (if (consp filters)
+        (car filters))))
+        
+(defun recentf-filter-changer (l)
+  "Manage a ring of filters. `recentf-filter-changer-alist' defines
+the filters in the ring. Actual filtering of L is delegated to the
+current filter in the ring. A filter menu item is displayed allowing
+to dynamically activate the next filter in the ring. If the filter
+ring is empty L is left unchanged."
+  (let ((current-filter-item (recentf-filter-changer-get-current))
+        (next-filter-item    (recentf-filter-changer-get-next)))
+    (when current-filter-item
+      (setq l (recentf-apply-menu-filter (car current-filter-item) l))
+      (if next-filter-item
+          (setq recentf-menu-filter-commands
+                (list (vector (cdr next-filter-item)
+                              '(recentf-filter-changer-goto-next)
+                              t)))))
+    l))
+
+;;;
+;;; Dialogs stuff
+;;;
+
+(defun recentf-cancel-dialog (&rest ignore)
+  "Cancel the current dialog. Used by `recentf-edit-list' and
+`recentf-open-files' dialogs."
+  (interactive)
+  (kill-buffer (current-buffer))
+  (message "Dialog canceled."))
+
+(defvar recentf-dialog-mode-map nil
+  "`recentf-dialog-mode' keymap.")
+
+(if recentf-dialog-mode-map
+    ()
+  (setq recentf-dialog-mode-map (make-sparse-keymap))
+  (define-key recentf-dialog-mode-map "q" 'recentf-cancel-dialog)
+  (set-keymap-parent recentf-dialog-mode-map widget-keymap))
+
+(defun recentf-dialog-mode ()
+  "Major mode used in recentf dialogs.
+
+These are the special commands of recentf-dialog-mode mode:
+    q -- cancel this dialog."
+  (interactive)
+  (setq major-mode 'recentf-dialog-mode)
+  (setq mode-name "recentf-dialog")
+  (use-local-map recentf-dialog-mode-map))
+
+;;;
+;;; Hooks and Commands
+;;;
+
+(defun recentf-add-file-hook ()
+  "Insert the name of the file just opened or written into `recentf-list'."
+  (and buffer-file-name (recentf-add-file buffer-file-name))
+  nil)
+
+(defun recentf-remove-file-hook ()
+  "When a buffer is killed remove a non readable file from `recentf-list'."
+  (and buffer-file-name (recentf-remove-if-non-readable buffer-file-name))
+  nil)
+
+(defun recentf-update-menu-hook ()
+  "Update the recentf menu from the current `recentf-list'."
+  (when recentf-update-menu-p
+    (condition-case nil
+        (progn
+          (setq recentf-update-menu-p nil)
+          (easy-menu-change recentf-menu-path
+                            recentf-menu-title
+                            (recentf-make-menu-items)
+                            recentf-menu-before))
+      (error nil))))
+
+(defun recentf-dump-variable (variable &optional limit)
+  "Insert a \"(setq VARIABLE value)\" in the current buffer. Optional
+argument LIMIT specifies a maximum length when VARIABLE value is a
+list (default to the full list)."
+  (let ((value (symbol-value variable)))
+    (insert (format "(setq %S\n      '(\n" variable))
+    (cond ((consp value)
+           (if (and (integerp limit) (> limit 0))
+               (setq value (recentf-trunc-list value limit)))
+           (mapcar (function
+                    (lambda (e)
+                      (insert (format "        %S\n" e))))
+                   value))
+          (t
+           (insert (format "        %S\n" value))))
+    (insert "        ))\n")
+    ))
+
+;;;###autoload
+(defun recentf-save-list ()
+  "Save the current `recentf-list' to the file `recentf-save-file'."
+  (interactive)
+  (with-temp-buffer
+    (erase-buffer)
+    (insert (format recentf-save-file-header (current-time-string)))
+    (recentf-dump-variable 'recentf-list recentf-max-saved-items)
+    (recentf-dump-variable 'recentf-filter-changer-state)
+    (if (file-writable-p recentf-save-file)
+        (write-region (point-min) (point-max) recentf-save-file))
+    (kill-buffer (current-buffer)))
+  nil)
+
+(defvar recentf-edit-selected-items nil
+  "Used by `recentf-edit-list' to hold the list of files to be deleted
+from `recentf-list'.")
+
+(defun recentf-edit-list-action (widget &rest ignore)
+  "Checkbox widget action used by `recentf-edit-list' to select/unselect a file."
+  (let ((value (widget-get widget ':tag)))
+    ;; if value is already in the selected items
+    (if (memq value recentf-edit-selected-items)
+        ;; then remove it
+        (progn
+          (setq recentf-edit-selected-items
+                (delq value recentf-edit-selected-items))
+          (message "%s removed from selection." value))
+      ;; else add it
+      (progn
+        (setq recentf-edit-selected-items
+              (nconc (list value) recentf-edit-selected-items))
+        (message "%s added to selection." value)))))
+  
+;;;###autoload
+(defun recentf-edit-list ()
+  "Allow the user to edit the files that are kept in the recent list."
+  (interactive)
+  (with-current-buffer (get-buffer-create (concat "*" recentf-menu-title " - Edit list*"))
+    (switch-to-buffer (current-buffer))
+    (kill-all-local-variables)
+    (let ((inhibit-read-only t))
+      (erase-buffer))
+    (let ((all (overlay-lists)))
+      ;; Delete all the overlays.
+      (mapcar 'delete-overlay (car all))
+      (mapcar 'delete-overlay (cdr all)))
+    (setq recentf-edit-selected-items nil)
+    ;; Insert the dialog header
+    (widget-insert "Select the files to be deleted from the 'recentf-list'.\n\n")
+    (widget-insert "Click on Ok to update the list. ")
+    (widget-insert "Click on Cancel or type \"q\" to quit.\n")
+    ;; Insert the list of files as checkboxes
+    (mapcar (function
+             (lambda (item)
+               (widget-create 'checkbox
+                              :value nil ; unselected checkbox
+                              :format "\n %[%v%]  %t"
+                              :tag item
+                              :notify 'recentf-edit-list-action)))
+            recentf-list)
+    (widget-insert "\n\n")
+    ;; Insert the Ok button
+    (widget-create 'push-button
+                   :notify (lambda (&rest ignore)
+                             (if recentf-edit-selected-items
+                                 (progn (kill-buffer (current-buffer))
+                                        (mapcar (function
+                                                 (lambda (item)
+                                                   (setq recentf-list
+                                                         (delq item recentf-list))))
+                                                recentf-edit-selected-items)
+                                        (message "%S file(s) removed from the list"
+                                                 (length recentf-edit-selected-items))
+                                        (setq recentf-update-menu-p t))
+                               (message "No file selected.")))
+                   "Ok")
+    (widget-insert " ")
+    ;; Insert the Cancel button
+    (widget-create 'push-button
+                   :notify 'recentf-cancel-dialog
+                   "Cancel")
+    (recentf-dialog-mode)
+    (widget-setup)
+    (goto-char (point-min))))
+
+;;;###autoload
+(defun recentf-cleanup ()
+  "Remove all non-readable and excluded files from `recentf-list'."
+  (interactive)
+  (let ((count (length recentf-list)))
+    (setq recentf-list
+          (delq nil
+                (mapcar (function
+                         (lambda (filename)
+                           (and (file-readable-p filename)
+                                (recentf-include-p filename)
+                                filename)))
+                        recentf-list)))
+    (setq count (- count (length recentf-list)))
+    (message "%s removed from the list"
+             (cond ((= count 0) "No file")
+                   ((= count 1) "One file")
+                   (t (format "%d files" count)))))
+  (setq recentf-update-menu-p t))
+
+(defun recentf-open-files-action (widget &rest ignore)
+  "Button widget action used by `recentf-open-files' to open a file."
+  (kill-buffer (current-buffer))
+  (funcall recentf-menu-action (widget-value widget)))
+
+(defvar recentf-open-files-item-shift ""
+  "String used by `recentf-open-files' to shift right sub-menu
+items.")
+
+(defun recentf-open-files-item (menu-element)
+  "Function called by `recentf-open-files' to insert a menu-element
+item in the current interaction buffer."
+  (let ((menu-item (car menu-element))
+        (file-path (cdr menu-element)))
+    (if (consp file-path)               ; This is a sub-menu
+        (let* ((shift recentf-open-files-item-shift)
+               (recentf-open-files-item-shift (concat shift "  ")))
+          (widget-create 'item
+                         :tag menu-item
+                         :sample-face 'bold
+                         :format (concat shift "%{%t%}:\n"))
+          (mapcar 'recentf-open-files-item
+                  file-path)
+          (widget-insert "\n"))
+      (widget-create 'push-button
+                     :button-face 'default
+                     :tag menu-item
+                     :help-echo (concat "Open " file-path)
+                     :format (concat recentf-open-files-item-shift "%[%t%]")
+                     :notify 'recentf-open-files-action
+                     file-path)
+      (widget-insert "\n"))))
+
+;;;###autoload
+(defun recentf-open-files (&optional files buffer-name)
+  "Open a buffer that allows the user to choose a file to open from
+the list of recently opened files. The optional argument FILES may be
+used to specify the list, otherwise recentf-list is used. The optional
+argument BUFFER-NAME specifies which buffer to use for the interaction."
+  (interactive)
+  (if (null files)
+      (setq files recentf-list))
+  (if (null buffer-name)
+      (setq buffer-name (concat "*" recentf-menu-title "*")))
+  (with-current-buffer (get-buffer-create buffer-name)
+    (switch-to-buffer (current-buffer))
+    (kill-all-local-variables)
+    (let ((inhibit-read-only t))
+      (erase-buffer))
+    (let ((all (overlay-lists)))
+      ;; Delete all the overlays.
+      (mapcar 'delete-overlay (car all))
+      (mapcar 'delete-overlay (cdr all)))
+    ;; Insert the dialog header
+    (widget-insert "Click on a file to open it. ")
+    (widget-insert "Click on Cancel or type \"q\" to quit.\n\n" )
+    ;; Insert the list of files as buttons
+    (let ((recentf-open-files-item-shift ""))
+      (mapcar 'recentf-open-files-item
+              (recentf-apply-menu-filter
+               recentf-menu-filter
+               (mapcar 'recentf-make-default-menu-element files))))
+    (widget-insert "\n")
+    ;; Insert the Cancel button
+    (widget-create 'push-button
+                   :notify 'recentf-cancel-dialog
+                   "Cancel")
+    (recentf-dialog-mode)
+    (widget-setup)
+    (goto-char (point-min))))
+
+;;;###autoload
+(defun recentf-open-more-files ()
+  "Allow the user to open files that are not in the menu."
+  (interactive)
+  (recentf-open-files (nthcdr recentf-max-menu-items recentf-list)
+                      (concat "*" recentf-menu-title " - More*")))
+
+;;;###autoload
+(defun recentf-mode (&optional arg)
+  "Toggle recentf mode.
+With prefix ARG, turn recentf mode on if and only if ARG is positive.
+Returns the new status of recentf mode (non-nil means on).
+
+When recentf mode is enabled, it maintains a menu for visiting files that
+were operated on recently."
+  (interactive "P")
+  (let ((on-p (if arg
+                  (> (prefix-numeric-value arg) 0)
+                (not recentf-mode))))
+    (if on-p
+        (unless recentf-initialized-p
+          (setq recentf-initialized-p t)
+          (if (file-readable-p recentf-save-file)
+              (load-file recentf-save-file))
+          (setq recentf-update-menu-p t)
+          (add-hook 'find-file-hooks       'recentf-add-file-hook)
+          (add-hook 'write-file-hooks      'recentf-add-file-hook)
+          (add-hook 'menu-bar-update-hook  'recentf-update-menu-hook)
+          (add-hook 'kill-emacs-hook       'recentf-save-list))
+      (when recentf-initialized-p
+        (setq recentf-initialized-p nil)
+        (recentf-save-list)
+        (easy-menu-remove-item nil recentf-menu-path recentf-menu-title)
+        (remove-hook 'find-file-hooks       'recentf-add-file-hook)
+        (remove-hook 'write-file-hooks      'recentf-add-file-hook)
+        (remove-hook 'menu-bar-update-hook  'recentf-update-menu-hook)
+        (remove-hook 'kill-emacs-hook       'recentf-save-list)))
+    (setq recentf-mode on-p)))
+
+(provide 'recentf)
+
+(run-hooks 'recentf-load-hook)
+
+;;; recentf.el ends here.