lisp/recentf.el

   1 ;;; recentf.el --- setup a menu of recently opened files
   2
   3 ;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007 Free Software Foundation, Inc.
   5
   6 ;; Author: David Ponce <david@dponce.com>
   7 ;; Created: July 19 1999
   8 ;; Keywords: files
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published
  14 ;; by the Free Software Foundation; either version 2, or (at your
  15 ;; option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  25 ;; Boston, MA 02110-1301, USA.
  26
  27 ;;; Commentary:
  28
  29 ;; This package maintains a menu for visiting files that were operated
  30 ;; on recently.  When enabled a new "Open Recent" sub menu is
  31 ;; displayed in the "Files" menu.  The recent files list is
  32 ;; automatically saved across Emacs sessions.  You can customize the
  33 ;; number of recent files displayed, the location of the menu and
  34 ;; others options (see the source code for details).
  35
  36 ;;; History:
  37 ;;
  38
  39 ;;; Code:
  40 (require 'easymenu)
  41 (require 'tree-widget)
  42 (require 'timer)
  43
  44 ;;; Internal data
  45 ;;
  46 (defvar recentf-list nil
  47   "List of recently opened files.")
  48
  49 (defsubst recentf-enabled-p ()
  50   "Return non-nil if recentf mode is currently enabled."
  51   (memq 'recentf-save-list kill-emacs-hook))
  52 \f
  53 ;;; Customization
  54 ;;
  55 (defgroup recentf nil
  56   "Maintain a menu of recently opened files."
  57   :version "21.1"
  58   :group 'files)
  59
  60 (defgroup recentf-filters nil
  61   "Group to customize recentf menu filters.
  62 You should define the options of your own filters in this group."
  63   :group 'recentf)
  64
  65 (defcustom recentf-max-saved-items 20
  66   "*Maximum number of items of the recent list that will be saved.
  67 A nil value means to save the whole list.
  68 See the command `recentf-save-list'."
  69   :group 'recentf
  70   :type 'integer)
  71
  72 (defcustom recentf-save-file "~/.recentf"
  73   "*File to save the recent list into."
  74   :group 'recentf
  75   :type 'file)
  76
  77 (defcustom recentf-save-file-modes 384 ;; 0600
  78   "Mode bits of recentf save file, as an integer, or nil.
  79 If non-nil, after writing `recentf-save-file', set its mode bits to
  80 this value.  By default give R/W access only to the user who owns that
  81 file.  See also the function `set-file-modes'."
  82   :group 'recentf
  83   :type '(choice (const :tag "Don't change" nil)
  84           integer))
  85
  86 (defcustom recentf-exclude nil
  87   "*List of regexps and predicates for filenames excluded from the recent list.
  88 When a filename matches any of the regexps or satisfies any of the
  89 predicates it is excluded from the recent list.
  90 A predicate is a function that is passed a filename to check and that
  91 must return non-nil to exclude it."
  92   :group 'recentf
  93   :type '(repeat (choice regexp function)))
  94
  95 (defcustom recentf-keep
  96   '(file-readable-p)
  97   "*List of regexps and predicates for filenames kept in the recent list.
  98 Regexps and predicates are tried in the specified order.
  99 When nil all filenames are kept in the recent list.
 100 When a filename matches any of the regexps or satisfies any of the
 101 predicates it is kept in the recent list.
 102 The default is to keep readable files.
 103 A predicate is a function that is passed a filename to check and that
 104 must return non-nil to keep it.  For example, you can add the
 105 `file-remote-p' predicate in front of this list to keep remote file
 106 names in the recent list without checking their readability through a
 107 remote access."
 108   :group 'recentf
 109   :type '(repeat (choice regexp function)))
 110
 111 (defun recentf-menu-customization-changed (variable value)
 112   "Function called when the recentf menu customization has changed.
 113 Set VARIABLE with VALUE, and force a rebuild of the recentf menu."
 114   (if (and (featurep 'recentf) (recentf-enabled-p))
 115       (progn
 116         ;; Unavailable until recentf has been loaded.
 117         (recentf-hide-menu)
 118         (set-default variable value)
 119         (recentf-show-menu))
 120     (set-default variable value)))
 121
 122 (defcustom recentf-menu-title "Open Recent"
 123   "*Name of the recentf menu."
 124   :group 'recentf
 125   :type 'string
 126   :set 'recentf-menu-customization-changed)
 127
 128 (defcustom recentf-menu-path '("File")
 129   "*Path where to add the recentf menu.
 130 If nil add it at top level (see also `easy-menu-add-item')."
 131   :group 'recentf
 132   :type '(choice (const :tag "Top Level" nil)
 133                  (sexp :tag "Menu Path"))
 134   :set 'recentf-menu-customization-changed)
 135
 136 (defcustom recentf-menu-before "Open File..."
 137   "*Name of the menu before which the recentf menu will be added.
 138 If nil add it at end of menu (see also `easy-menu-add-item')."
 139   :group 'recentf
 140   :type '(choice (string :tag "Name")
 141                  (const :tag "Last" nil))
 142   :set 'recentf-menu-customization-changed)
 143
 144 (defcustom recentf-menu-action 'find-file
 145   "*Function to invoke with a filename item of the recentf menu.
 146 The default is to call `find-file' to edit the selected file."
 147   :group 'recentf
 148   :type 'function)
 149
 150 (defcustom recentf-max-menu-items 10
 151   "*Maximum number of items in the recentf menu."
 152   :group 'recentf
 153   :type 'integer)
 154
 155 (defcustom recentf-menu-filter nil
 156   "*Function used to filter files displayed in the recentf menu.
 157 A nil value means no filter.  The following functions are predefined:
 158
 159 - `recentf-sort-ascending'
 160     Sort menu items in ascending order.
 161 - `recentf-sort-descending'
 162     Sort menu items in descending order.
 163 - `recentf-sort-basenames-ascending'
 164     Sort menu items by filenames sans directory in ascending order.
 165 - `recentf-sort-basenames-descending'
 166     Sort menu items by filenames sans directory in descending order.
 167 - `recentf-sort-directories-ascending'
 168     Sort menu items by directories in ascending order.
 169 - `recentf-sort-directories-descending'
 170     Sort menu items by directories in descending order.
 171 - `recentf-show-basenames'
 172     Show filenames sans directory in menu items.
 173 - `recentf-show-basenames-ascending'
 174     Show filenames sans directory in ascending order.
 175 - `recentf-show-basenames-descending'
 176     Show filenames sans directory in descending order.
 177 - `recentf-relative-filter'
 178     Show filenames relative to `default-directory'.
 179 - `recentf-arrange-by-rule'
 180     Show sub-menus following user defined rules.
 181 - `recentf-arrange-by-mode'
 182     Show a sub-menu for each major mode.
 183 - `recentf-arrange-by-dir'
 184     Show a sub-menu for each directory.
 185 - `recentf-filter-changer'
 186     Manage a menu of filters.
 187
 188 The filter function is called with one argument, the list of menu
 189 elements used to build the menu and must return a new list of menu
 190 elements (see `recentf-make-menu-element' for menu element form)."
 191   :group 'recentf
 192   :type '(radio (const nil)
 193                 (function-item recentf-sort-ascending)
 194                 (function-item recentf-sort-descending)
 195                 (function-item recentf-sort-basenames-ascending)
 196                 (function-item recentf-sort-basenames-descending)
 197                 (function-item recentf-sort-directories-ascending)
 198                 (function-item recentf-sort-directories-descending)
 199                 (function-item recentf-show-basenames)
 200                 (function-item recentf-show-basenames-ascending)
 201                 (function-item recentf-show-basenames-descending)
 202                 (function-item recentf-relative-filter)
 203                 (function-item recentf-arrange-by-rule)
 204                 (function-item recentf-arrange-by-mode)
 205                 (function-item recentf-arrange-by-dir)
 206                 (function-item recentf-filter-changer)
 207                 function))
 208
 209 (defcustom recentf-menu-open-all-flag nil
 210   "*Non-nil means to show an \"All...\" item in the menu.
 211 This item will replace the \"More...\" item."
 212   :group 'recentf
 213   :type 'boolean)
 214
 215 (defcustom recentf-menu-append-commands-flag t
 216   "*Non-nil means to append command items to the menu."
 217   :group 'recentf
 218   :type 'boolean)
 219
 220 (define-obsolete-variable-alias 'recentf-menu-append-commands-p
 221                                 'recentf-menu-append-commands-flag
 222                                 "22.1")
 223
 224 (defcustom recentf-auto-cleanup 'mode
 225   "*Define when to automatically cleanup the recent list.
 226 The following values can be set:
 227
 228 - `mode'
 229     Cleanup when turning the mode on (default).
 230 - `never'
 231     Never cleanup the list automatically.
 232 - A number
 233     Cleanup each time Emacs has been idle that number of seconds.
 234 - A time string
 235     Cleanup at specified time string, for example at \"11:00pm\".
 236
 237 Setting this variable directly does not take effect;
 238 use \\[customize].
 239
 240 See also the command `recentf-cleanup', that can be used to manually
 241 cleanup the list."
 242   :group 'recentf
 243   :type '(radio (const  :tag "When mode enabled"
 244                         :value mode)
 245                 (const  :tag "Never"
 246                         :value never)
 247                 (number :tag "When idle that seconds"
 248                         :value 300)
 249                 (string :tag "At time"
 250                         :value "11:00pm"))
 251   :set (lambda (variable value)
 252          (set-default variable value)
 253          (when (featurep 'recentf)
 254            ;; Unavailable until recentf has been loaded.
 255            (recentf-auto-cleanup))))
 256
 257 (defcustom recentf-initialize-file-name-history t
 258   "*Non-nil means to initialize `file-name-history' with the recent list.
 259 If `file-name-history' is not empty, do nothing."
 260   :group 'recentf
 261   :type  'boolean)
 262
 263 (defcustom recentf-load-hook nil
 264    "*Normal hook run at end of loading the `recentf' package."
 265   :group 'recentf
 266   :type 'hook)
 267
 268 (defcustom recentf-filename-handlers nil
 269   "Functions to post process recent file names.
 270 They are successively passed a file name to transform it."
 271   :group 'recentf
 272   :type '(choice
 273           (const :tag "None" nil)
 274           (repeat :tag "Functions"
 275            (choice
 276             (const file-truename)
 277             (const abbreviate-file-name)
 278             (function :tag "Other function")))))
 279
 280 (defcustom recentf-show-file-shortcuts-flag t
 281   "Whether to show ``[N]'' for the Nth item up to 10.
 282 If non-nil, `recentf-open-files' will show labels for keys that can be
 283 used as shortcuts to open the Nth file."
 284   :group 'recentf
 285   :type 'boolean)
 286 \f
 287 ;;; Utilities
 288 ;;
 289 (defconst recentf-case-fold-search
 290   (memq system-type '(vax-vms windows-nt cygwin))
 291   "Non-nil if recentf searches and matches should ignore case.")
 292
 293 (defsubst recentf-string-equal (s1 s2)
 294   "Return non-nil if strings S1 and S2 have identical contents.
 295 Ignore case if `recentf-case-fold-search' is non-nil."
 296   (if recentf-case-fold-search
 297       (string-equal (downcase s1) (downcase s2))
 298     (string-equal s1 s2)))
 299
 300 (defsubst recentf-string-lessp (s1 s2)
 301   "Return non-nil if string S1 is less than S2 in lexicographic order.
 302 Ignore case if `recentf-case-fold-search' is non-nil."
 303   (if recentf-case-fold-search
 304       (string-lessp (downcase s1) (downcase s2))
 305     (string-lessp s1 s2)))
 306
 307 (defun recentf-string-member (elt list)
 308   "Return non-nil if ELT is an element of LIST.
 309 The value is actually the tail of LIST whose car is ELT.
 310 ELT must be a string and LIST a list of strings.
 311 Ignore case if `recentf-case-fold-search' is non-nil."
 312   (while (and list (not (recentf-string-equal elt (car list))))
 313     (setq list (cdr list)))
 314   list)
 315
 316 (defsubst recentf-trunc-list (l n)
 317   "Return from L the list of its first N elements."
 318   (let (nl)
 319     (while (and l (> n 0))
 320       (setq nl (cons (car l) nl)
 321             n  (1- n)
 322             l  (cdr l)))
 323     (nreverse nl)))
 324
 325 (defun recentf-dump-variable (variable &optional limit)
 326   "Insert a \"(setq VARIABLE value)\" in the current buffer.
 327 When the value of VARIABLE is a list, optional argument LIMIT
 328 specifies a maximum number of elements to insert.  By default insert
 329 the full list."
 330   (let ((value (symbol-value variable)))
 331     (if (atom value)
 332         (insert (format "\n(setq %S '%S)\n" variable value))
 333       (when (and (integerp limit) (> limit 0))
 334         (setq value (recentf-trunc-list value limit)))
 335       (insert (format "\n(setq %S\n      '(" variable))
 336       (dolist (e value)
 337         (insert (format "\n        %S" e)))
 338       (insert "\n        ))\n"))))
 339
 340 (defvar recentf-auto-cleanup-timer nil
 341   "Timer used to automatically cleanup the recent list.
 342 See also the option `recentf-auto-cleanup'.")
 343
 344 (defun recentf-auto-cleanup ()
 345   "Automatic cleanup of the recent list."
 346   (when (timerp recentf-auto-cleanup-timer)
 347     (cancel-timer recentf-auto-cleanup-timer))
 348   (when recentf-mode
 349     (setq recentf-auto-cleanup-timer
 350           (cond
 351            ((eq 'mode recentf-auto-cleanup)
 352             (recentf-cleanup)
 353             nil)
 354            ((numberp recentf-auto-cleanup)
 355             (run-with-idle-timer
 356              recentf-auto-cleanup t 'recentf-cleanup))
 357            ((stringp recentf-auto-cleanup)
 358             (run-at-time
 359              recentf-auto-cleanup nil 'recentf-cleanup))))))
 360 \f
 361 ;;; File functions
 362 ;;
 363 (defsubst recentf-push (filename)
 364   "Push FILENAME into the recent list, if it isn't there yet.
 365 If it is there yet, move it at the beginning of the list.
 366 If `recentf-case-fold-search' is non-nil, ignore case when comparing
 367 filenames."
 368   (let ((m (recentf-string-member filename recentf-list)))
 369     (and m (setq recentf-list (delq (car m) recentf-list)))
 370     (push filename recentf-list)))
 371
 372 (defun recentf-apply-filename-handlers (name)
 373   "Apply `recentf-filename-handlers' to file NAME.
 374 Return the transformed file name, or NAME if any handler failed, or
 375 returned nil."
 376   (or (condition-case nil
 377           (let ((handlers recentf-filename-handlers)
 378                 (filename name))
 379             (while (and filename handlers)
 380               (setq filename (funcall (car handlers) filename)
 381                     handlers (cdr handlers)))
 382             filename)
 383         (error nil))
 384       name))
 385
 386 (defsubst recentf-expand-file-name (name)
 387   "Convert file NAME to absolute, and canonicalize it.
 388 NAME is first passed to the function `expand-file-name', then to
 389 `recentf-filename-handlers' to post process it."
 390   (recentf-apply-filename-handlers (expand-file-name name)))
 391
 392 (defun recentf-include-p (filename)
 393   "Return non-nil if FILENAME should be included in the recent list.
 394 That is, if it doesn't match any of the `recentf-exclude' checks."
 395   (let ((case-fold-search recentf-case-fold-search)
 396         (checks recentf-exclude)
 397         (keepit t))
 398     (while (and checks keepit)
 399       (setq keepit (condition-case nil
 400                        (not (if (stringp (car checks))
 401                                 ;; A regexp
 402                                 (string-match (car checks) filename)
 403                               ;; A predicate
 404                               (funcall (car checks) filename)))
 405                      (error nil))
 406             checks (cdr checks)))
 407     keepit))
 408
 409 (defun recentf-keep-p (filename)
 410   "Return non-nil if FILENAME should be kept in the recent list.
 411 That is, if it matches any of the `recentf-keep' checks."
 412   (let* ((case-fold-search recentf-case-fold-search)
 413          (checks recentf-keep)
 414          (keepit (null checks)))
 415     (while (and checks (not keepit))
 416       (setq keepit (condition-case nil
 417                        (if (stringp (car checks))
 418                            ;; A regexp
 419                            (string-match (car checks) filename)
 420                          ;; A predicate
 421                          (funcall (car checks) filename))
 422                      (error nil))
 423             checks (cdr checks)))
 424     keepit))
 425
 426 (defsubst recentf-add-file (filename)
 427   "Add or move FILENAME at the beginning of the recent list.
 428 Does nothing if the name satisfies any of the `recentf-exclude'
 429 regexps or predicates."
 430   (setq filename (recentf-expand-file-name filename))
 431   (when (recentf-include-p filename)
 432     (recentf-push filename)))
 433
 434 (defsubst recentf-remove-if-non-kept (filename)
 435   "Remove FILENAME from the recent list, if file is not kept.
 436 Return non-nil if FILENAME has been removed."
 437   (unless (recentf-keep-p filename)
 438     (let ((m (recentf-string-member
 439               (recentf-expand-file-name filename) recentf-list)))
 440       (and m (setq recentf-list (delq (car m) recentf-list))))))
 441
 442 (defsubst recentf-directory-compare (f1 f2)
 443   "Compare absolute filenames F1 and F2.
 444 First compare directories, then filenames sans directory.
 445 Return non-nil if F1 is less than F2."
 446   (let ((d1 (file-name-directory f1))
 447         (d2 (file-name-directory f2)))
 448     (if (recentf-string-equal d1 d2)
 449         (recentf-string-lessp (file-name-nondirectory f1)
 450                               (file-name-nondirectory f2))
 451       (recentf-string-lessp d1 d2))))
 452 \f
 453 ;;; Menu building
 454 ;;
 455 (defsubst recentf-digit-shortcut-command-name (n)
 456   "Return a command name to open the Nth most recent file.
 457 See also the command `recentf-open-most-recent-file'."
 458   (intern (format "recentf-open-most-recent-file-%d" n)))
 459
 460 (defvar recentf--shortcuts-keymap
 461   (let ((km (make-sparse-keymap)))
 462     (dolist (k '(0 9 8 7 6 5 4 3 2 1))
 463       (let ((cmd (recentf-digit-shortcut-command-name k)))
 464         ;; Define a shortcut command.
 465         (defalias cmd
 466           `(lambda ()
 467              (interactive)
 468              (recentf-open-most-recent-file ,k)))
 469         ;; Bind it to a digit key.
 470         (define-key km (vector (+ k ?0)) cmd)))
 471     km)
 472   "Digit shortcuts keymap.")
 473
 474 (defvar recentf-menu-items-for-commands
 475   (list
 476    ["Cleanup list"
 477     recentf-cleanup
 478     :help "Remove duplicates, and obsoletes files from the recent list"
 479     :active t]
 480    ["Edit list..."
 481     recentf-edit-list
 482     :help "Manually remove files from the recent list"
 483     :active t]
 484    ["Save list now"
 485     recentf-save-list
 486     :help "Save the list of recently opened files now"
 487     :active t]
 488    ["Options..."
 489     (customize-group "recentf")
 490     :help "Customize recently opened files menu and options"
 491     :active t]
 492    )
 493   "List of menu items for recentf commands.")
 494
 495 (defvar recentf-menu-filter-commands nil
 496   "This variable can be used by menu filters to setup their own command menu.
 497 If non-nil it must contain a list of valid menu-items to be appended
 498 to the recent file list part of the menu.  Before calling a menu
 499 filter function this variable is reset to nil.")
 500
 501 (defsubst recentf-elements (n)
 502   "Return a list of the first N elements of the recent list."
 503   (recentf-trunc-list recentf-list n))
 504
 505 (defsubst recentf-make-menu-element (menu-item menu-value)
 506   "Create a new menu-element.
 507 A menu element is a pair (MENU-ITEM . MENU-VALUE), where MENU-ITEM is
 508 the menu item string displayed.  MENU-VALUE is the file to be open
 509 when the corresponding MENU-ITEM is selected.  Or it is a
 510 pair (SUB-MENU-TITLE . MENU-ELEMENTS) where SUB-MENU-TITLE is a
 511 sub-menu title and MENU-ELEMENTS is the list of menu elements in the
 512 sub-menu."
 513   (cons menu-item menu-value))
 514
 515 (defsubst recentf-menu-element-item (e)
 516   "Return the item part of the menu-element E."
 517   (car e))
 518
 519 (defsubst recentf-menu-element-value (e)
 520   "Return the value part of the menu-element E."
 521   (cdr e))
 522
 523 (defsubst recentf-set-menu-element-item (e item)
 524   "Change the item part of menu-element E to ITEM."
 525   (setcar e item))
 526
 527 (defsubst recentf-set-menu-element-value (e value)
 528   "Change the value part of menu-element E to VALUE."
 529   (setcdr e value))
 530
 531 (defsubst recentf-sub-menu-element-p (e)
 532   "Return non-nil if menu-element E defines a sub-menu."
 533   (consp (recentf-menu-element-value e)))
 534
 535 (defsubst recentf-make-default-menu-element (file)
 536   "Make a new default menu element with FILE.
 537 This a menu element (FILE . FILE)."
 538   (recentf-make-menu-element file file))
 539
 540 (defsubst recentf-menu-elements (n)
 541   "Return a list of the first N default menu elements from the recent list.
 542 See also `recentf-make-default-menu-element'."
 543   (mapcar 'recentf-make-default-menu-element
 544           (recentf-elements n)))
 545
 546 (defun recentf-apply-menu-filter (filter l)
 547   "Apply function FILTER to the list of menu-elements L.
 548 It takes care of sub-menu elements in L and recursively apply FILTER
 549 to them.  It is guaranteed that FILTER receives only a list of single
 550 menu-elements (no sub-menu)."
 551   (if (and l (functionp filter))
 552       (let ((case-fold-search recentf-case-fold-search)
 553             elts others)
 554         ;; split L into two sub-listes, one of sub-menus elements and
 555         ;; another of single menu elements.
 556         (dolist (elt l)
 557           (if (recentf-sub-menu-element-p elt)
 558               (push elt elts)
 559             (push elt others)))
 560         ;; Apply FILTER to single elements.
 561         (when others
 562           (setq others (funcall filter (nreverse others))))
 563         ;; Apply FILTER to sub-menu elements.
 564         (setq l nil)
 565         (dolist (elt elts)
 566           (recentf-set-menu-element-value
 567            elt (recentf-apply-menu-filter
 568                 filter (recentf-menu-element-value elt)))
 569           (push elt l))
 570         ;; Return the new filtered menu element list.
 571         (nconc l others))
 572     l))
 573
 574 ;; Count the number of assigned menu shortcuts.
 575 (defvar recentf-menu-shortcuts)
 576
 577 (defun recentf-make-menu-items (&optional menu)
 578   "Make menu items from the recent list.
 579 This is a menu filter function which ignores the MENU argument."
 580   (setq recentf-menu-filter-commands nil)
 581   (let* ((recentf-menu-shortcuts 0)
 582          (file-items
 583           (condition-case err
 584               (mapcar 'recentf-make-menu-item
 585                       (recentf-apply-menu-filter
 586                        recentf-menu-filter
 587                        (recentf-menu-elements recentf-max-menu-items)))
 588             (error
 589              (message "recentf update menu failed: %s"
 590                       (error-message-string err))))))
 591     (append
 592      (or file-items
 593          '(["No files" t
 594             :help "No recent file to open"
 595             :active nil]))
 596      (if recentf-menu-open-all-flag
 597          '(["All..." recentf-open-files
 598             :help "Open recent files through a dialog"
 599             :active t])
 600        (and (< recentf-max-menu-items (length recentf-list))
 601             '(["More..." recentf-open-more-files
 602                :help "Open files not in the menu through a dialog"
 603                :active t])))
 604      (and recentf-menu-filter-commands '("---"))
 605      recentf-menu-filter-commands
 606      (and recentf-menu-items-for-commands '("---"))
 607      recentf-menu-items-for-commands)))
 608
 609 (defun recentf-menu-value-shortcut (name)
 610   "Return a shortcut digit for file NAME.
 611 Return nil if file NAME is not one of the ten more recent."
 612   (let ((i 0) k)
 613     (while (and (not k) (< i 10))
 614       (if (string-equal name (nth i recentf-list))
 615           (progn
 616             (setq recentf-menu-shortcuts (1+ recentf-menu-shortcuts))
 617             (setq k (% (1+ i) 10)))
 618         (setq i (1+ i))))
 619     k))
 620
 621 (defun recentf-make-menu-item (elt)
 622   "Make a menu item from menu element ELT."
 623   (let ((item  (recentf-menu-element-item  elt))
 624         (value (recentf-menu-element-value elt)))
 625     (if (recentf-sub-menu-element-p elt)
 626         (cons item (mapcar 'recentf-make-menu-item value))
 627       (let ((k (and (< recentf-menu-shortcuts 10)
 628                     (recentf-menu-value-shortcut value))))
 629         (vector item
 630                 ;; If the file name is one of the ten more recent, use
 631                 ;; a digit shortcut command to open it, else use an
 632                 ;; anonymous command.
 633                 (if k
 634                     (recentf-digit-shortcut-command-name k)
 635                   `(lambda ()
 636                      (interactive)
 637                      (,recentf-menu-action ,value)))
 638                 :help (concat "Open " value)
 639                 :active t)))))
 640
 641 (defsubst recentf-menu-bar ()
 642   "Return the keymap of the global menu bar."
 643   (lookup-key global-map [menu-bar]))
 644
 645 (defun recentf-show-menu ()
 646   "Show the menu of recently opened files."
 647   (easy-menu-add-item
 648    (recentf-menu-bar) recentf-menu-path
 649    (list recentf-menu-title :filter 'recentf-make-menu-items)
 650    recentf-menu-before))
 651
 652 (defun recentf-hide-menu ()
 653   "Hide the menu of recently opened files."
 654   (easy-menu-remove-item (recentf-menu-bar) recentf-menu-path
 655                          recentf-menu-title))
 656 \f
 657 ;;; Predefined menu filters
 658 ;;
 659 (defsubst recentf-sort-ascending (l)
 660   "Sort the list of menu elements L in ascending order.
 661 The MENU-ITEM part of each menu element is compared."
 662   (sort (copy-sequence l)
 663         #'(lambda (e1 e2)
 664             (recentf-string-lessp
 665              (recentf-menu-element-item e1)
 666              (recentf-menu-element-item e2)))))
 667
 668 (defsubst recentf-sort-descending (l)
 669   "Sort the list of menu elements L in descending order.
 670 The MENU-ITEM part of each menu element is compared."
 671   (sort (copy-sequence l)
 672         #'(lambda (e1 e2)
 673             (recentf-string-lessp
 674              (recentf-menu-element-item e2)
 675              (recentf-menu-element-item e1)))))
 676
 677 (defsubst recentf-sort-basenames-ascending (l)
 678   "Sort the list of menu elements L in ascending order.
 679 Only filenames sans directory are compared."
 680   (sort (copy-sequence l)
 681         #'(lambda (e1 e2)
 682             (recentf-string-lessp
 683              (file-name-nondirectory (recentf-menu-element-value e1))
 684              (file-name-nondirectory (recentf-menu-element-value e2))))))
 685
 686 (defsubst recentf-sort-basenames-descending (l)
 687   "Sort the list of menu elements L in descending order.
 688 Only filenames sans directory are compared."
 689   (sort (copy-sequence l)
 690         #'(lambda (e1 e2)
 691             (recentf-string-lessp
 692              (file-name-nondirectory (recentf-menu-element-value e2))
 693              (file-name-nondirectory (recentf-menu-element-value e1))))))
 694
 695 (defsubst recentf-sort-directories-ascending (l)
 696   "Sort the list of menu elements L in ascending order.
 697 Compares directories then filenames to order the list."
 698   (sort (copy-sequence l)
 699         #'(lambda (e1 e2)
 700             (recentf-directory-compare
 701              (recentf-menu-element-value e1)
 702              (recentf-menu-element-value e2)))))
 703
 704 (defsubst recentf-sort-directories-descending (l)
 705   "Sort the list of menu elements L in descending order.
 706 Compares directories then filenames to order the list."
 707   (sort (copy-sequence l)
 708         #'(lambda (e1 e2)
 709             (recentf-directory-compare
 710              (recentf-menu-element-value e2)
 711              (recentf-menu-element-value e1)))))
 712
 713 (defun recentf-show-basenames (l &optional no-dir)
 714   "Filter the list of menu elements L to show filenames sans directory.
 715 When a filename is duplicated, it is appended a sequence number if
 716 optional argument NO-DIR is non-nil, or its directory otherwise."
 717   (let (filtered-names filtered-list full name counters sufx)
 718     (dolist (elt l (nreverse filtered-list))
 719       (setq full (recentf-menu-element-value elt)
 720             name (file-name-nondirectory full))
 721       (if (not (member name filtered-names))
 722           (push name filtered-names)
 723         (if no-dir
 724             (if (setq sufx (assoc name counters))
 725                 (setcdr sufx (1+ (cdr sufx)))
 726               (setq sufx 1)
 727               (push (cons name sufx) counters))
 728           (setq sufx (file-name-directory full)))
 729         (setq name (format "%s(%s)" name sufx)))
 730       (push (recentf-make-menu-element name full) filtered-list))))
 731
 732 (defsubst recentf-show-basenames-ascending (l)
 733   "Filter the list of menu elements L to show filenames sans directory.
 734 Filenames are sorted in ascending order.
 735 This filter combines the `recentf-sort-basenames-ascending' and
 736 `recentf-show-basenames' filters."
 737   (recentf-show-basenames (recentf-sort-basenames-ascending l)))
 738
 739 (defsubst recentf-show-basenames-descending (l)
 740   "Filter the list of menu elements L to show filenames sans directory.
 741 Filenames are sorted in descending order.
 742 This filter combines the `recentf-sort-basenames-descending' and
 743 `recentf-show-basenames' filters."
 744   (recentf-show-basenames (recentf-sort-basenames-descending l)))
 745
 746 (defun recentf-relative-filter (l)
 747   "Filter the list of menu-elements L to show relative filenames.
 748 Filenames are relative to the `default-directory'."
 749   (mapcar #'(lambda (menu-element)
 750               (let* ((ful (recentf-menu-element-value menu-element))
 751                      (rel (file-relative-name ful default-directory)))
 752                 (if (string-match "^\\.\\." rel)
 753                     menu-element
 754                   (recentf-make-menu-element rel ful))))
 755           l))
 756 \f
 757 ;;; Rule based menu filters
 758 ;;
 759 (defcustom recentf-arrange-rules
 760   '(
 761     ("Elisp files (%d)" ".\\.el\\'")
 762     ("Java files (%d)"  ".\\.java\\'")
 763     ("C/C++ files (%d)" "c\\(pp\\)?\\'")
 764     )
 765   "*List of rules used by `recentf-arrange-by-rule' to build sub-menus.
 766 A rule is a pair (SUB-MENU-TITLE . MATCHER).  SUB-MENU-TITLE is the
 767 displayed title of the sub-menu where a '%d' `format' pattern is
 768 replaced by the number of items in the sub-menu.  MATCHER is a regexp
 769 or a list of regexps.  Items matching one of the regular expressions in
 770 MATCHER are added to the corresponding sub-menu.
 771 SUB-MENU-TITLE can be a function.  It is passed every items that
 772 matched the corresponding MATCHER, and it must return a
 773 pair (SUB-MENU-TITLE . ITEM).  SUB-MENU-TITLE is a computed sub-menu
 774 title that can be another function.  ITEM is the received item which
 775 may have been modified to match another rule."
 776   :group 'recentf-filters
 777   :type '(repeat (cons (choice string function)
 778                        (repeat regexp))))
 779
 780 (defcustom recentf-arrange-by-rule-others "Other files (%d)"
 781   "*Title of the `recentf-arrange-by-rule' sub-menu.
 782 This is for the menu where items that don't match any
 783 `recentf-arrange-rules' are displayed.  If nil these items are
 784 displayed in the main recent files menu.  A '%d' `format' pattern in
 785 the title is replaced by the number of items in the sub-menu."
 786   :group 'recentf-filters
 787   :type '(choice (const  :tag "Main menu" nil)
 788                  (string :tag "Title")))
 789
 790 (defcustom recentf-arrange-by-rules-min-items 0
 791   "*Minimum number of items in a `recentf-arrange-by-rule' sub-menu.
 792 If the number of items in a sub-menu is less than this value the
 793 corresponding sub-menu items are displayed in the main recent files
 794 menu or in the `recentf-arrange-by-rule-others' sub-menu if
 795 defined."
 796   :group 'recentf-filters
 797   :type 'number)
 798
 799 (defcustom recentf-arrange-by-rule-subfilter nil
 800   "*Function called by a rule based filter to filter sub-menu elements.
 801 A nil value means no filter.  See also `recentf-menu-filter'.
 802 You can't use another rule based filter here."
 803   :group 'recentf-filters
 804   :type '(choice (const nil) function)
 805   :set (lambda (variable value)
 806          (when (memq value '(recentf-arrange-by-rule
 807                              recentf-arrange-by-mode
 808                              recentf-arrange-by-dir))
 809            (error "Recursive use of a rule based filter"))
 810          (set-default variable value)))
 811
 812 (defun recentf-match-rule (file)
 813   "Return the rule that match FILE."
 814   (let ((rules recentf-arrange-rules)
 815         match found)
 816     (while (and (not found) rules)
 817       (setq match (cdar rules))
 818       (when (stringp match)
 819         (setq match (list match)))
 820       (while (and match (not (string-match (car match) file)))
 821         (setq match (cdr match)))
 822       (if match
 823           (setq found (cons (caar rules) file))
 824         (setq rules (cdr rules))))
 825     found))
 826
 827 (defun recentf-arrange-by-rule (l)
 828   "Filter the list of menu-elements L.
 829 Arrange them in sub-menus following rules in `recentf-arrange-rules'."
 830   (when recentf-arrange-rules
 831     (let (menus others menu file min count)
 832       ;; Put menu items into sub-menus as defined by rules.
 833       (dolist (elt l)
 834         (setq file (recentf-menu-element-value elt)
 835               menu (recentf-match-rule file))
 836         (while (functionp (car menu))
 837           (setq menu (funcall (car menu) (cdr menu))))
 838         (if (not (stringp (car menu)))
 839             (push elt others)
 840           (setq menu (or (assoc (car menu) menus)
 841                          (car (push (list (car menu)) menus))))
 842           (recentf-set-menu-element-value
 843            menu (cons elt (recentf-menu-element-value menu)))))
 844       ;; Finalize each sub-menu:
 845       ;; - truncate it depending on the value of
 846       ;;   `recentf-arrange-by-rules-min-items',
 847       ;; - replace %d by the number of menu items,
 848       ;; - apply `recentf-arrange-by-rule-subfilter' to menu items.
 849       (setq min (if (natnump recentf-arrange-by-rules-min-items)
 850                     recentf-arrange-by-rules-min-items 0)
 851             l nil)
 852       (dolist (elt menus)
 853         (setq menu (recentf-menu-element-value elt)
 854               count (length menu))
 855         (if (< count min)
 856             (setq others (nconc menu others))
 857           (recentf-set-menu-element-item
 858            elt (format (recentf-menu-element-item elt) count))
 859           (recentf-set-menu-element-value
 860            elt (recentf-apply-menu-filter
 861                 recentf-arrange-by-rule-subfilter (nreverse menu)))
 862           (push elt l)))
 863       ;; Add the menu items remaining in the `others' bin.
 864       (when (setq others (nreverse others))
 865         (setq l (nconc
 866                  l
 867                  ;; Put items in an sub menu.
 868                  (if (stringp recentf-arrange-by-rule-others)
 869                      (list
 870                       (recentf-make-menu-element
 871                        (format recentf-arrange-by-rule-others
 872                                (length others))
 873                        (recentf-apply-menu-filter
 874                         recentf-arrange-by-rule-subfilter others)))
 875                    ;; Append items to the main menu.
 876                    (recentf-apply-menu-filter
 877                     recentf-arrange-by-rule-subfilter others)))))))
 878   l)
 879 \f
 880 ;;; Predefined rule based menu filters
 881 ;;
 882 (defun recentf-indirect-mode-rule (file)
 883   "Apply a second level `auto-mode-alist' regexp to FILE."
 884   (recentf-match-rule (substring file 0 (match-beginning 0))))
 885
 886 (defun recentf-build-mode-rules ()
 887   "Convert `auto-mode-alist' to menu filter rules.
 888 Rules obey `recentf-arrange-rules' format."
 889   (let ((case-fold-search recentf-case-fold-search)
 890         regexp rule-name rule rules)
 891     (dolist (mode auto-mode-alist)
 892       (setq regexp (car mode)
 893             mode   (cdr mode))
 894       (when mode
 895         (cond
 896          ;; Build a special "strip suffix" rule from entries of the
 897          ;; form (REGEXP FUNCTION NON-NIL).  Notice that FUNCTION is
 898          ;; ignored by the menu filter.  So in some corner cases a
 899          ;; wrong mode could be guessed.
 900          ((and (consp mode) (cadr mode))
 901           (setq rule-name 'recentf-indirect-mode-rule))
 902          ((and mode (symbolp mode))
 903           (setq rule-name (symbol-name mode))
 904           (if (string-match "\\(.*\\)-mode$" rule-name)
 905               (setq rule-name (match-string 1 rule-name)))
 906           (setq rule-name (concat rule-name " (%d)"))))
 907         (setq rule (assoc rule-name rules))
 908         (if rule
 909             (setcdr rule (cons regexp (cdr rule)))
 910           (push (list rule-name regexp) rules))))
 911     ;; It is important to preserve auto-mode-alist order
 912     ;; to ensure the right file <-> mode association
 913     (nreverse rules)))
 914
 915 (defun recentf-arrange-by-mode (l)
 916   "Split the list of menu-elements L into sub-menus by major mode."
 917   (let ((recentf-arrange-rules (recentf-build-mode-rules))
 918         (recentf-arrange-by-rule-others "others (%d)"))
 919     (recentf-arrange-by-rule l)))
 920
 921 (defun recentf-file-name-nondir (l)
 922   "Filter the list of menu-elements L to show filenames sans directory.
 923 This simplified version of `recentf-show-basenames' does not handle
 924 duplicates.  It is used by `recentf-arrange-by-dir' as its
 925 `recentf-arrange-by-rule-subfilter'."
 926   (mapcar #'(lambda (e)
 927               (recentf-make-menu-element
 928                (file-name-nondirectory (recentf-menu-element-value e))
 929                (recentf-menu-element-value e)))
 930           l))
 931
 932 (defun recentf-dir-rule (file)
 933   "Return as a sub-menu, the directory FILE belongs to."
 934   (cons (file-name-directory file) file))
 935
 936 (defun recentf-arrange-by-dir (l)
 937   "Split the list of menu-elements L into sub-menus by directory."
 938   (let ((recentf-arrange-rules '((recentf-dir-rule . ".*")))
 939         (recentf-arrange-by-rule-subfilter 'recentf-file-name-nondir)
 940         recentf-arrange-by-rule-others)
 941     (recentf-arrange-by-rule l)))
 942 \f
 943 ;;; Menu of menu filters
 944 ;;
 945 (defvar recentf-filter-changer-current nil
 946   "Current filter used by `recentf-filter-changer'.")
 947
 948 (defcustom recentf-filter-changer-alist
 949   '(
 950     (recentf-arrange-by-mode . "Grouped by Mode")
 951     (recentf-arrange-by-dir  . "Grouped by Directory")
 952     (recentf-arrange-by-rule . "Grouped by Custom Rules")
 953     )
 954   "*List of filters managed by `recentf-filter-changer'.
 955 Each filter is defined by a pair (FUNCTION . LABEL), where FUNCTION is
 956 the filter function, and LABEL is the menu item displayed to select
 957 that filter."
 958   :group 'recentf-filters
 959   :type '(repeat (cons function string))
 960   :set (lambda (variable value)
 961          (setq recentf-filter-changer-current nil)
 962          (set-default variable value)))
 963
 964 (defun recentf-filter-changer-select (filter)
 965   "Select FILTER as the current menu filter.
 966 See `recentf-filter-changer'."
 967   (setq recentf-filter-changer-current filter))
 968
 969 (defun recentf-filter-changer (l)
 970   "Manage a sub-menu of menu filters.
 971 `recentf-filter-changer-alist' defines the filters in the menu.
 972 Filtering of L is delegated to the selected filter in the menu."
 973   (unless recentf-filter-changer-current
 974     (setq recentf-filter-changer-current
 975           (caar recentf-filter-changer-alist)))
 976   (if (not recentf-filter-changer-current)
 977       l
 978     (setq recentf-menu-filter-commands
 979           (list
 980            `("Show files"
 981              ,@(mapcar
 982                 #'(lambda (f)
 983                     `[,(cdr f)
 984                       (setq recentf-filter-changer-current ',(car f))
 985                       ;;:active t
 986                       :style radio ;;radio Don't work with GTK :-(
 987                       :selected (eq recentf-filter-changer-current
 988                                     ',(car f))
 989                       ;;:help ,(cdr f)
 990                       ])
 991                 recentf-filter-changer-alist))))
 992     (recentf-apply-menu-filter recentf-filter-changer-current l)))
 993 \f
 994 ;;; Hooks
 995 ;;
 996 (defun recentf-track-opened-file ()
 997   "Insert the name of the file just opened or written into the recent list."
 998   (and buffer-file-name
 999        (recentf-add-file buffer-file-name))
1000   ;; Must return nil because it is run from `write-file-functions'.
1001   nil)
1002
1003 (defun recentf-track-closed-file ()
1004   "Update the recent list when a buffer is killed.
1005 That is, remove a non kept file from the recent list."
1006   (and buffer-file-name
1007        (recentf-remove-if-non-kept buffer-file-name)))
1008
1009 (defconst recentf-used-hooks
1010   '(
1011     (find-file-hook       recentf-track-opened-file)
1012     (write-file-functions recentf-track-opened-file)
1013     (kill-buffer-hook     recentf-track-closed-file)
1014     (kill-emacs-hook      recentf-save-list)
1015     )
1016   "Hooks used by recentf.")
1017 \f
1018 ;;; Commands
1019 ;;
1020
1021 ;;; Common dialog stuff
1022 ;;
1023 (defun recentf-cancel-dialog (&rest ignore)
1024   "Cancel the current dialog.
1025 IGNORE arguments."
1026   (interactive)
1027   (kill-buffer (current-buffer))
1028   (message "Dialog canceled"))
1029
1030 (defun recentf-dialog-goto-first (widget-type)
1031   "Move the cursor to the first WIDGET-TYPE in current dialog.
1032 Go to the beginning of buffer if not found."
1033   (goto-char (point-min))
1034   (condition-case nil
1035       (let (done)
1036         (widget-move 1)
1037         (while (not done)
1038           (if (eq widget-type (widget-type (widget-at (point))))
1039               (setq done t)
1040             (widget-move 1))))
1041     (error
1042      (goto-char (point-min)))))
1043
1044 (defvar recentf-dialog-mode-map
1045   (let ((km (copy-keymap recentf--shortcuts-keymap)))
1046     (set-keymap-parent km widget-keymap)
1047     (define-key km "q" 'recentf-cancel-dialog)
1048     (define-key km [follow-link] "\C-m")
1049     km)
1050   "Keymap used in recentf dialogs.")
1051
1052 (define-derived-mode recentf-dialog-mode nil "recentf-dialog"
1053   "Major mode of recentf dialogs.
1054
1055 \\{recentf-dialog-mode-map}"
1056   :syntax-table nil
1057   :abbrev-table nil
1058   (setq truncate-lines t))
1059
1060 (defmacro recentf-dialog (name &rest forms)
1061   "Show a dialog buffer with NAME, setup with FORMS."
1062   (declare (indent 1) (debug t))
1063   `(with-current-buffer (get-buffer-create ,name)
1064     ;; Cleanup buffer
1065     (let ((inhibit-read-only t)
1066           (ol (overlay-lists)))
1067       (mapc 'delete-overlay (car ol))
1068       (mapc 'delete-overlay (cdr ol))
1069       (erase-buffer))
1070     (recentf-dialog-mode)
1071     ,@forms
1072     (widget-setup)
1073     (switch-to-buffer (current-buffer))))
1074 \f
1075 ;;; Edit list dialog
1076 ;;
1077 (defvar recentf-edit-list nil)
1078
1079 (defun recentf-edit-list-select (widget &rest ignore)
1080   "Toggle a file selection based on the checkbox WIDGET state.
1081 IGNORE other arguments."
1082   (let ((value (widget-get widget :tag))
1083         (check (widget-value widget)))
1084     (if check
1085         (add-to-list 'recentf-edit-list value)
1086       (setq recentf-edit-list (delq value recentf-edit-list)))
1087     (message "%s %sselected" value (if check "" "un"))))
1088
1089 (defun recentf-edit-list-validate (&rest ignore)
1090   "Process the recent list when the edit list dialog is committed.
1091 IGNORE arguments."
1092   (if recentf-edit-list
1093       (let ((i 0))
1094         (dolist (e recentf-edit-list)
1095           (setq recentf-list (delq e recentf-list)
1096                 i (1+ i)))
1097         (kill-buffer (current-buffer))
1098         (message "%S file(s) removed from the list" i))
1099     (message "No file selected")))
1100
1101 (defun recentf-edit-list ()
1102   "Show a dialog to delete selected files from the recent list."
1103   (interactive)
1104   (unless recentf-list
1105     (error "The list of recent files is empty"))
1106   (recentf-dialog (format "*%s - Edit list*" recentf-menu-title)
1107     (set (make-local-variable 'recentf-edit-list) nil)
1108     (widget-insert
1109      "Click on OK to delete selected files from the recent list.
1110 Click on Cancel or type `q' to cancel.\n")
1111     ;; Insert the list of files as checkboxes
1112     (dolist (item recentf-list)
1113       (widget-create 'checkbox
1114                      :value nil         ; unselected checkbox
1115                      :format "\n %[%v%]  %t"
1116                      :tag item
1117                      :notify 'recentf-edit-list-select))
1118     (widget-insert "\n\n")
1119     (widget-create
1120      'push-button
1121      :notify 'recentf-edit-list-validate
1122      :help-echo "Delete selected files from the recent list"
1123      "Ok")
1124     (widget-insert " ")
1125     (widget-create
1126      'push-button
1127      :notify 'recentf-cancel-dialog
1128      "Cancel")
1129     (recentf-dialog-goto-first 'checkbox)))
1130 \f
1131 ;;; Open file dialog
1132 ;;
1133 (defun recentf-open-files-action (widget &rest ignore)
1134   "Open the file stored in WIDGET's value when notified.
1135 IGNORE other arguments."
1136   (kill-buffer (current-buffer))
1137   (funcall recentf-menu-action (widget-value widget)))
1138
1139 ;; List of files associated to a digit shortcut key.
1140 (defvar recentf--files-with-key nil)
1141
1142 (defun recentf-show-digit-shortcut-filter (l)
1143   "Filter the list of menu-elements L to show digit shortcuts."
1144   (let ((i 0))
1145     (dolist (e l)
1146       (setq i (1+ i))
1147       (recentf-set-menu-element-item
1148        e (format "[%d] %s" (% i 10) (recentf-menu-element-item e))))
1149     l))
1150
1151 (defun recentf-open-files-item (menu-element)
1152   "Return a widget to display MENU-ELEMENT in a dialog buffer."
1153   (if (consp (cdr menu-element))
1154       ;; Represent a sub-menu with a tree widget
1155       `(tree-widget
1156         :open t
1157         :match ignore
1158         :node (item :tag ,(car menu-element)
1159                     :sample-face bold
1160                     :format "%{%t%}:\n")
1161         ,@(mapcar 'recentf-open-files-item
1162                   (cdr menu-element)))
1163     ;; Represent a single file with a link widget
1164     `(link :tag ,(car menu-element)
1165            :button-prefix ""
1166            :button-suffix ""
1167            :button-face default
1168            :format "%[%t\n%]"
1169            :help-echo ,(concat "Open " (cdr menu-element))
1170            :action recentf-open-files-action
1171            ,(cdr menu-element))))
1172
1173 (defun recentf-open-files-items (files)
1174   "Return a list of widgets to display FILES in a dialog buffer."
1175   (set (make-local-variable 'recentf--files-with-key)
1176        (recentf-trunc-list files 10))
1177   (mapcar 'recentf-open-files-item
1178           (append
1179            ;; When requested group the files with shortcuts together
1180            ;; at the top of the list.
1181            (when recentf-show-file-shortcuts-flag
1182              (setq files (nthcdr 10 files))
1183              (recentf-apply-menu-filter
1184               'recentf-show-digit-shortcut-filter
1185               (mapcar 'recentf-make-default-menu-element
1186                       recentf--files-with-key)))
1187            ;; Then the other files.
1188            (recentf-apply-menu-filter
1189             recentf-menu-filter
1190             (mapcar 'recentf-make-default-menu-element
1191                     files)))))
1192
1193 (defun recentf-open-files (&optional files buffer-name)
1194   "Show a dialog to open a recent file.
1195 If optional argument FILES is non-nil, it is a list of recently-opened
1196 files to choose from.  It defaults to the whole recent list.
1197 If optional argument BUFFER-NAME is non-nil, it is a buffer name to
1198 use for the dialog.  It defaults to \"*`recentf-menu-title'*\"."
1199   (interactive)
1200   (unless (or files recentf-list)
1201     (error "There is no recent file to open"))
1202   (recentf-dialog (or buffer-name (format "*%s*" recentf-menu-title))
1203     (widget-insert "Click on a file"
1204                    (if recentf-show-file-shortcuts-flag
1205                        ", or type the corresponding digit key,"
1206                      "")
1207                    " to open it.\n"
1208                    "Click on Cancel or type `q' to cancel.\n")
1209     ;; Use a L&F that looks like the recentf menu.
1210     (tree-widget-set-theme "folder")
1211     (apply 'widget-create
1212            `(group
1213              :indent 2
1214              :format "\n%v\n"
1215              ,@(recentf-open-files-items (or files recentf-list))))
1216     (widget-create
1217      'push-button
1218      :notify 'recentf-cancel-dialog
1219      "Cancel")
1220     (recentf-dialog-goto-first 'link)))
1221
1222 (defun recentf-open-more-files ()
1223   "Show a dialog to open a recent file that is not in the menu."
1224   (interactive)
1225   (recentf-open-files (nthcdr recentf-max-menu-items recentf-list)
1226                       (format "*%s - More*" recentf-menu-title)))
1227
1228 (defun recentf-open-most-recent-file (&optional n)
1229   "Open the Nth most recent file.
1230 Optional argument N must be a valid digit number.  It defaults to 1.
1231 1 opens the most recent file, 2 the second most recent one, etc..
1232 0 opens the tenth most recent file."
1233   (interactive "p")
1234   (cond
1235    ((zerop n) (setq n 10))
1236    ((and (> n 0) (< n 10)))
1237    ((error "Recent file number out of range [0-9], %d" n)))
1238   (let ((file (nth (1- n) (or recentf--files-with-key recentf-list))))
1239     (unless file (error "Not that many recent files"))
1240     ;; Close the open files dialog.
1241     (when recentf--files-with-key
1242       (kill-buffer (current-buffer)))
1243     (funcall recentf-menu-action file)))
1244 \f
1245 ;;; Save/load/cleanup the recent list
1246 ;;
1247 (defconst recentf-save-file-header
1248   ";;; Automatically generated by `recentf' on %s.\n"
1249   "Header to be written into the `recentf-save-file'.")
1250
1251 (defconst recentf-save-file-coding-system
1252   (if (coding-system-p 'utf-8-emacs)
1253       'utf-8-emacs
1254     'emacs-mule)
1255   "Coding system of the file `recentf-save-file'.")
1256
1257 (defun recentf-save-list ()
1258   "Save the recent list.
1259 Write data into the file specified by `recentf-save-file'."
1260   (interactive)
1261   (condition-case error
1262       (with-temp-buffer
1263         (erase-buffer)
1264         (set-buffer-file-coding-system recentf-save-file-coding-system)
1265         (insert (format recentf-save-file-header (current-time-string)))
1266         (recentf-dump-variable 'recentf-list recentf-max-saved-items)
1267         (recentf-dump-variable 'recentf-filter-changer-current)
1268         (insert "\n\f\n;;; Local Variables:\n"
1269                 (format ";;; coding: %s\n" recentf-save-file-coding-system)
1270                 ";;; End:\n")
1271         (write-file (expand-file-name recentf-save-file))
1272         (when recentf-save-file-modes
1273           (set-file-modes recentf-save-file recentf-save-file-modes))
1274         nil)
1275     (error
1276      (warn "recentf mode: %s" (error-message-string error)))))
1277
1278 (defun recentf-load-list ()
1279   "Load a previously saved recent list.
1280 Read data from the file specified by `recentf-save-file'.
1281 When `recentf-initialize-file-name-history' is non-nil, initialize an
1282 empty `file-name-history' with the recent list."
1283   (interactive)
1284   (let ((file (expand-file-name recentf-save-file)))
1285     (when (file-readable-p file)
1286       (load-file file)
1287       (and recentf-initialize-file-name-history
1288            (not file-name-history)
1289            (setq file-name-history (mapcar 'abbreviate-file-name
1290                                            recentf-list))))))
1291
1292 (defun recentf-cleanup ()
1293   "Cleanup the recent list.
1294 That is, remove duplicates, non-kept, and excluded files."
1295   (interactive)
1296   (message "Cleaning up the recentf list...")
1297   (let ((n 0) newlist)
1298     (dolist (f recentf-list)
1299       (setq f (recentf-expand-file-name f))
1300       (if (and (recentf-include-p f)
1301                (recentf-keep-p f)
1302                (not (recentf-string-member f newlist)))
1303           (push f newlist)
1304         (setq n (1+ n))
1305         (message "File %s removed from the recentf list" f)))
1306     (message "Cleaning up the recentf list...done (%d removed)" n)
1307     (setq recentf-list (nreverse newlist))))
1308 \f
1309 ;;; The minor mode
1310 ;;
1311 (defvar recentf-mode-map (make-sparse-keymap)
1312   "Keymap to use in recentf mode.")
1313
1314 ;;;###autoload
1315 (define-minor-mode recentf-mode
1316   "Toggle recentf mode.
1317 With prefix argument ARG, turn on if positive, otherwise off.
1318 Returns non-nil if the new state is enabled.
1319
1320 When recentf mode is enabled, it maintains a menu for visiting files
1321 that were operated on recently."
1322   :global t
1323   :group 'recentf
1324   :keymap recentf-mode-map
1325   (unless (and recentf-mode (recentf-enabled-p))
1326     (if recentf-mode
1327         (progn
1328           (recentf-load-list)
1329           (recentf-show-menu))
1330       (recentf-hide-menu)
1331       (recentf-save-list))
1332     (recentf-auto-cleanup)
1333     (let ((hook-setup (if recentf-mode 'add-hook 'remove-hook)))
1334       (dolist (hook recentf-used-hooks)
1335         (apply hook-setup hook)))
1336     (run-hooks 'recentf-mode-hook)
1337     (when (interactive-p)
1338       (message "Recentf mode %sabled" (if recentf-mode "en" "dis"))))
1339   recentf-mode)
1340
1341 (provide 'recentf)
1342
1343 (run-hooks 'recentf-load-hook)
1344 \f
1345 ;; arch-tag: 78f1eec9-0d16-4d19-a4eb-2e4529edb62a
1346 ;;; recentf.el ends here