lisp/menu-bar.el

   1 ;;; menu-bar.el --- define a default menu bar.
   2
   3 ;; Author: RMS
   4 ;; Keywords: internal
   5
   6 ;; Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 ;; Avishai Yacobi suggested some menu rearrangements.
  25
  26 ;;; Code:
  27
  28 ;; Don't clobber an existing menu-bar keymap, to preserve any menu-bar key
  29 ;; definitions made in loaddefs.el.
  30 (or (lookup-key global-map [menu-bar])
  31     (define-key global-map [menu-bar] (make-sparse-keymap "menu-bar")))
  32 (defvar menu-bar-help-menu (make-sparse-keymap "Help"))
  33
  34 ;; Force Help item to come last, after the major mode's own items.
  35 ;; The symbol used to be called `help', but that gets confused with the
  36 ;; help key.
  37 (setq menu-bar-final-items '(help-menu))
  38
  39 (define-key global-map [menu-bar help-menu] (cons "Help" menu-bar-help-menu))
  40 (defvar menu-bar-search-menu (make-sparse-keymap "Search"))
  41 (define-key global-map [menu-bar search] (cons "Search" menu-bar-search-menu))
  42 (defvar menu-bar-edit-menu (make-sparse-keymap "Edit"))
  43 (define-key global-map [menu-bar edit] (cons "Edit" menu-bar-edit-menu))
  44 (defvar menu-bar-tools-menu (make-sparse-keymap "Tools"))
  45 (define-key global-map [menu-bar tools] (cons "Tools" menu-bar-tools-menu))
  46 (defvar menu-bar-files-menu (make-sparse-keymap "Files"))
  47 (define-key global-map [menu-bar files] (cons "Files" menu-bar-files-menu))
  48
  49 ;; This alias is for compatibility with 19.28 and before.
  50 (defvar menu-bar-file-menu menu-bar-files-menu)
  51 \f
  52 (defvar vc-menu-map (make-sparse-keymap "Version Control"))
  53
  54 (define-key menu-bar-tools-menu [calendar] '("Display Calendar" . calendar))
  55 (define-key menu-bar-tools-menu [rmail] '("Read Mail" . rmail))
  56 (if (fboundp 'open-network-stream)
  57     (define-key menu-bar-tools-menu [gnus] '("Read Net News" . gnus)))
  58
  59 (define-key menu-bar-tools-menu [separator-vc]
  60   '("--"))
  61
  62 (define-key menu-bar-tools-menu [vc-menu]
  63   (cons "Version Control" vc-menu-map))
  64
  65 (define-key menu-bar-tools-menu [separator-compare]
  66   '("--"))
  67
  68 (define-key menu-bar-tools-menu [epatch]
  69   '("Apply Patch" . menu-bar-epatch-menu))
  70 (define-key menu-bar-tools-menu [ediff-merge]
  71   '("Merge" . menu-bar-ediff-merge-menu))
  72 (define-key menu-bar-tools-menu [compare]
  73   '("Compare" . menu-bar-ediff-menu))
  74
  75 (define-key menu-bar-tools-menu [separator-print]
  76   '("--"))
  77
  78 (put 'print-region 'menu-enable 'mark-active)
  79 (put 'ps-print-region-with-faces 'menu-enable 'mark-active)
  80
  81 (define-key menu-bar-tools-menu [ps-print-region]
  82   '("Postscript Print Region" . ps-print-region-with-faces))
  83 (define-key menu-bar-tools-menu [ps-print-buffer]
  84   '("Postscript Print Buffer" . ps-print-buffer-with-faces))
  85 (define-key menu-bar-tools-menu [print-region]
  86   '("Print Region" . print-region))
  87 (define-key menu-bar-tools-menu [print-buffer]
  88   '("Print Buffer" . print-buffer))
  89 \f
  90 (define-key menu-bar-files-menu [exit-emacs]
  91   '("Exit Emacs" . save-buffers-kill-emacs))
  92
  93 (define-key menu-bar-files-menu [separator-exit]
  94   '("--"))
  95
  96 (define-key menu-bar-files-menu [one-window]
  97   '("One Window" . delete-other-windows))
  98
  99 (define-key menu-bar-files-menu [split-window]
 100   '("Split Window" . split-window-vertically))
 101
 102 (if (fboundp 'delete-frame)
 103     (progn
 104       (define-key menu-bar-files-menu [delete-frame]
 105         '("Delete Frame" . delete-frame))
 106       (define-key menu-bar-files-menu [make-frame-on-display]
 107         '("Open New Display..." . make-frame-on-display))
 108       (define-key menu-bar-files-menu [make-frame]
 109         '("Make New Frame" . make-frame))))
 110
 111 (define-key menu-bar-files-menu [separator-buffers]
 112   '("--"))
 113
 114 (define-key menu-bar-files-menu [kill-buffer]
 115   '("Kill Current Buffer" . kill-this-buffer))
 116 (define-key menu-bar-files-menu [insert-file]
 117   '("Insert File..." . insert-file))
 118 (define-key menu-bar-files-menu [revert-buffer]
 119   '("Revert Buffer" . revert-buffer))
 120 (define-key menu-bar-files-menu [write-file]
 121   '("Save Buffer As..." . write-file))
 122 (define-key menu-bar-files-menu [save-buffer] '("Save Buffer" . save-buffer))
 123 (define-key menu-bar-files-menu [dired] '("Open Directory..." . dired))
 124 (define-key menu-bar-files-menu [open-file] '("Open File..." . find-file))
 125
 126 \f
 127 (defun nonincremental-search-forward (string)
 128   "Read a string and search for it nonincrementally."
 129   (interactive "sSearch for string: ")
 130   (if (equal string "")
 131       (search-forward (car search-ring))
 132     (isearch-update-ring string nil)
 133     (search-forward string)))
 134
 135 (defun nonincremental-search-backward (string)
 136   "Read a string and search backward for it nonincrementally."
 137   (interactive "sSearch for string: ")
 138   (if (equal string "")
 139       (search-backward (car search-ring))
 140     (isearch-update-ring string nil)
 141     (search-backward string)))
 142
 143 (defun nonincremental-re-search-forward (string)
 144   "Read a regular expression and search for it nonincrementally."
 145   (interactive "sSearch for regexp: ")
 146   (if (equal string "")
 147       (re-search-forward (car regexp-search-ring))
 148     (isearch-update-ring string t)
 149     (re-search-forward string)))
 150
 151 (defun nonincremental-re-search-backward (string)
 152   "Read a regular expression and search backward for it nonincrementally."
 153   (interactive "sSearch for regexp: ")
 154   (if (equal string "")
 155       (re-search-backward (car regexp-search-ring))
 156     (isearch-update-ring string t)
 157     (re-search-backward string)))
 158
 159 (defun nonincremental-repeat-search-forward ()
 160   "Search forward for the previous search string."
 161   (interactive)
 162   (search-forward (car search-ring)))
 163
 164 (defun nonincremental-repeat-search-backward ()
 165   "Search backward for the previous search string."
 166   (interactive)
 167   (search-backward (car search-ring)))
 168
 169 (defun nonincremental-repeat-re-search-forward ()
 170   "Search forward for the previous regular expression."
 171   (interactive)
 172   (re-search-forward (car regexp-search-ring)))
 173
 174 (defun nonincremental-repeat-re-search-backward ()
 175   "Search backward for the previous regular expression."
 176   (interactive)
 177   (re-search-backward (car regexp-search-ring)))
 178
 179 (define-key menu-bar-search-menu [query-replace-regexp]
 180   '("Query Replace Regexp..." . query-replace-regexp))
 181 (define-key menu-bar-search-menu [query-replace]
 182   '("Query Replace..." . query-replace))
 183 (define-key menu-bar-search-menu [find-tag]
 184   '("Find Tag..." . find-tag))
 185 (define-key menu-bar-search-menu [bookmark]
 186   '("Bookmarks" . menu-bar-bookmark-map))
 187
 188 (define-key menu-bar-search-menu [separator-search]
 189   '("--"))
 190
 191 (define-key menu-bar-search-menu [nonincremental-repeat-re-search-back]
 192   '("Repeat Regexp Backwards" . nonincremental-repeat-re-search-backward))
 193 (define-key menu-bar-search-menu [nonincremental-repeat-search-back]
 194   '("Repeat Backwards" . nonincremental-repeat-search-backward))
 195 (define-key menu-bar-search-menu [nonincremental-repeat-re-search-fwd]
 196   '("Repeat Regexp" . nonincremental-repeat-re-search-forward))
 197 (define-key menu-bar-search-menu [nonincremental-repeat-search-fwd]
 198   '("Repeat Search" . nonincremental-repeat-search-forward))
 199
 200 (define-key menu-bar-search-menu [separator-repeat]
 201   '("--"))
 202
 203 (define-key menu-bar-search-menu [re-search-back]
 204   '("Regexp Search Backwards..." . nonincremental-re-search-backward))
 205 (define-key menu-bar-search-menu [search-back]
 206   '("Search Backwards..." . nonincremental-search-backward))
 207 (define-key menu-bar-search-menu [re-search-fwd]
 208   '("Regexp Search..." . nonincremental-re-search-forward))
 209 (define-key menu-bar-search-menu [search-fwd]
 210   '("Search..." . nonincremental-search-forward))
 211 \f
 212 (if (fboundp 'start-process)
 213     (define-key menu-bar-edit-menu [spell] '("Spell" . ispell-menu-map)))
 214 (define-key menu-bar-edit-menu [fill] '("Fill" . fill-region))
 215 (define-key menu-bar-edit-menu [props] '("Text Properties" . facemenu-menu))
 216
 217 (define-key menu-bar-edit-menu [separator-edit]
 218   '("--"))
 219
 220 (define-key menu-bar-edit-menu [clear] '("Clear" . delete-region))
 221
 222 (define-key menu-bar-edit-menu [paste] '("Paste Most Recent" . yank))
 223
 224 (defvar yank-menu (cons "Select Yank" nil))
 225 (fset 'yank-menu (cons 'keymap yank-menu))
 226 (define-key menu-bar-edit-menu [select-paste] '("Select and Paste" . yank-menu))
 227 (define-key menu-bar-edit-menu [copy] '("Copy" . menu-bar-kill-ring-save))
 228 (define-key menu-bar-edit-menu [cut] '("Cut" . kill-region))
 229 (define-key menu-bar-edit-menu [undo] '("Undo" . undo))
 230
 231 (defun menu-bar-kill-ring-save (beg end)
 232   (interactive "r")
 233   (if (mouse-region-match)
 234       (message "Select a region with the mouse does `copy' automatically")
 235     (kill-ring-save beg end)))
 236
 237 (put 'fill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 238 (put 'kill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 239 (put 'menu-bar-kill-ring-save 'menu-enable 'mark-active)
 240 (put 'yank 'menu-enable '(and (x-selection-exists-p) (not buffer-read-only)))
 241 (put 'yank-menu 'menu-enable '(and (cdr yank-menu) (not buffer-read-only)))
 242 (put 'delete-region 'menu-enable '(and mark-active
 243                                        (not buffer-read-only)
 244                                        (not (mouse-region-match))))
 245 (put 'undo 'menu-enable '(and (not buffer-read-only)
 246                               (if (eq last-command 'undo)
 247                                   pending-undo-list
 248                                 (consp buffer-undo-list))))
 249 (put 'query-replace 'menu-enable '(not buffer-read-only))
 250 (put 'query-replace-regexp 'menu-enable '(not buffer-read-only))
 251
 252 (autoload 'ispell-menu-map "ispell" nil t 'keymap)
 253
 254 ;; These are alternative definitions for the cut, paste and copy
 255 ;; menu items.  Use them if your system expects these to use the clipboard.
 256
 257 (put 'clipboard-kill-region 'menu-enable 'mark-active)
 258 (put 'clipboard-kill-ring-save 'menu-enable 'mark-active)
 259 (put 'clipboard-yank 'menu-enable
 260      '(or (x-selection-exists-p) (x-selection-exists-p 'CLIPBOARD)))
 261
 262 (defun clipboard-yank ()
 263   "Reinsert the last stretch of killed text, or the clipboard contents."
 264   (interactive)
 265   (let ((x-select-enable-clipboard t))
 266     (yank)))
 267
 268 (defun clipboard-kill-ring-save (beg end)
 269   "Copy region to kill ring, and save in the X clipboard."
 270   (interactive "r")
 271   (let ((x-select-enable-clipboard t))
 272     (kill-ring-save beg end)))
 273
 274 (defun clipboard-kill-region (beg end)
 275   "Kill the region, and save it in the X clipboard."
 276   (interactive "r")
 277   (let ((x-select-enable-clipboard t))
 278     (kill-region beg end)))
 279
 280 (defun menu-bar-enable-clipboard ()
 281   "Make CUT, PASTE and COPY (keys and menu bar items) use the clipboard.
 282 Do the same for the keys of the same name."
 283   (interactive)
 284   ;; We can't use constant list structure here because it becomes pure,
 285   ;; and because it gets modified with cache data.
 286   (define-key menu-bar-edit-menu [paste]
 287     (cons "Paste" 'clipboard-yank))
 288   (define-key menu-bar-edit-menu [copy]
 289     (cons "Copy" 'clipboard-kill-ring-save))
 290   (define-key menu-bar-edit-menu [cut]
 291     (cons "Cut" 'clipboard-kill-region))
 292
 293   (define-key global-map [f20] 'clipboard-kill-region)
 294   (define-key global-map [f16] 'clipboard-kill-ring-save)
 295   (define-key global-map [f18] 'clipboard-yank)
 296   ;; X11R6 versions
 297   (define-key global-map [cut] 'clipboard-kill-region)
 298   (define-key global-map [copy] 'clipboard-kill-ring-save)
 299   (define-key global-map [paste] 'clipboard-yank))
 300 \f
 301 (define-key menu-bar-help-menu [emacs-version]
 302   '("Show Version" . emacs-version))
 303 (define-key menu-bar-help-menu [report-emacs-bug]
 304   '("Send Bug Report..." . report-emacs-bug))
 305 (define-key menu-bar-help-menu [finder-by-keyword]
 306   '("Find Lisp Packages..." . finder-by-keyword))
 307 (define-key menu-bar-help-menu [emacs-tutorial]
 308   '("Emacs Tutorial" . help-with-tutorial))
 309 (define-key menu-bar-help-menu [man]
 310   '("Man..." . manual-entry))
 311 (define-key menu-bar-help-menu [describe-variable]
 312   '("Describe Variable..." . describe-variable))
 313 (define-key menu-bar-help-menu [describe-function]
 314   '("Describe Function..." . describe-function))
 315 (define-key menu-bar-help-menu [describe-key]
 316   '("Describe Key..." . describe-key))
 317 (define-key menu-bar-help-menu [list-keybindings]
 318   '("List Keybindings" . describe-bindings))
 319 (define-key menu-bar-help-menu [command-apropos]
 320   '("Command Apropos..." . command-apropos))
 321 (define-key menu-bar-help-menu [describe-mode]
 322   '("Describe Mode" . describe-mode))
 323 (define-key menu-bar-help-menu [info] '("Browse Manuals" . info))
 324 (define-key menu-bar-help-menu [emacs-faq] '("Emacs FAQ" . view-emacs-FAQ))
 325 (define-key menu-bar-help-menu [emacs-news] '("Emacs News" . view-emacs-news))
 326
 327 (defun kill-this-buffer ()      ; for the menubar
 328   "Kills the current buffer."
 329   (interactive)
 330   (kill-buffer (current-buffer)))
 331
 332 (defun kill-this-buffer-enabled-p ()
 333   (let ((count 0)
 334         (buffers (buffer-list)))
 335     (while buffers
 336       (or (string-match "^ " (buffer-name (car buffers)))
 337           (setq count (1+ count)))
 338       (setq buffers (cdr buffers)))
 339     (and (not (window-minibuffer-p (selected-window)))
 340          (> count 1))))
 341
 342 (put 'kill-this-buffer 'menu-enable '(kill-this-buffer-enabled-p))
 343
 344 (put 'save-buffer 'menu-enable
 345      '(and (buffer-modified-p)
 346            (not (window-minibuffer-p (selected-window)))))
 347
 348 (put 'write-file 'menu-enable
 349      '(not (window-minibuffer-p (selected-window))))
 350
 351 (put 'find-file 'menu-enable
 352      '(not (window-minibuffer-p (selected-window))))
 353
 354 (put 'dired 'menu-enable
 355      '(not (window-minibuffer-p (selected-window))))
 356
 357 (put 'insert-file 'menu-enable
 358      '(not (window-minibuffer-p (selected-window))))
 359
 360 (put 'revert-buffer 'menu-enable
 361      '(or revert-buffer-function revert-buffer-insert-file-contents-function
 362           (and (buffer-file-name)
 363                (or (buffer-modified-p)
 364                    (not (verify-visited-file-modtime (current-buffer)))))))
 365
 366 ;; Permit deleting frame if it would leave a visible or iconified frame.
 367 (put 'delete-frame 'menu-enable
 368      '(delete-frame-enabled-p))
 369
 370 (defun delete-frame-enabled-p ()
 371   "Return non-nil if `delete-frame' should be enabled in the menu bar."
 372   (let ((frames (frame-list))
 373               (count 0))
 374           (while frames
 375             (if (frame-visible-p (car frames))
 376                 (setq count (1+ count)))
 377             (setq frames (cdr frames)))
 378           (> count 1)))
 379
 380 (put 'advertised-undo 'menu-enable
 381      '(and (not (eq t buffer-undo-list))
 382            (if (eq last-command 'undo)
 383                (and (boundp 'pending-undo-list)
 384                     pending-undo-list)
 385              buffer-undo-list)))
 386
 387 (defvar yank-menu-length 20
 388   "*Maximum length to display in the yank-menu.")
 389
 390 (defun menu-bar-update-yank-menu (string old)
 391   (let ((front (car (cdr yank-menu)))
 392         (menu-string (if (<= (length string) yank-menu-length)
 393                          string
 394                        (concat
 395                         (substring string 0 (/ yank-menu-length 2))
 396                         "..."
 397                         (substring string (- (/ yank-menu-length 2)))))))
 398     ;; Don't let the menu string be all dashes
 399     ;; because that has a special meaning in a menu.
 400     (if (string-match "\\`-+\\'" menu-string)
 401         (setq menu-string (concat menu-string " ")))
 402     ;; If we're supposed to be extending an existing string, and that
 403     ;; string really is at the front of the menu, then update it in place.
 404     (if (and old (or (eq old (car front))
 405                      (string= old (car front))))
 406         (progn
 407           (setcar front string)
 408           (setcar (cdr front) menu-string))
 409       (setcdr yank-menu
 410               (cons
 411                (cons string (cons menu-string 'menu-bar-select-yank))
 412                (cdr yank-menu)))))
 413   (if (> (length (cdr yank-menu)) kill-ring-max)
 414       (setcdr (nthcdr kill-ring-max yank-menu) nil)))
 415
 416 (defun menu-bar-select-yank ()
 417   (interactive "*")
 418   (push-mark (point))
 419   (insert last-command-event))
 420 \f
 421 ;; This definition is just to show what this looks like.
 422 ;; It gets overridden below when menu-bar-update-buffers is called.
 423 (define-key global-map [menu-bar buffer]
 424   (cons "Buffers" (make-sparse-keymap "Buffers")))
 425
 426 (defvar buffers-menu-max-size 10
 427   "*Maximum number of entries which may appear on the Buffers menu.
 428 If this is 10, then only the ten most-recently-selected buffers are shown.
 429 If this is nil, then all buffers are shown.
 430 A large number or nil slows down menu responsiveness.")
 431
 432 (defvar list-buffers-directory nil)
 433
 434 (defvar menu-bar-update-buffers-maxbuf)
 435
 436 (defun menu-bar-select-buffer ()
 437   (interactive)
 438   (switch-to-buffer last-command-event))
 439
 440 (defun menu-bar-select-frame ()
 441   (interactive)
 442   (make-frame-visible last-command-event)
 443   (raise-frame last-command-event)
 444   (select-frame last-command-event))
 445
 446 (defun menu-bar-update-buffers-1 (elt)
 447   (cons (format
 448          (format "%%%ds  %%s%%s  %%s" menu-bar-update-buffers-maxbuf)
 449          (cdr elt)
 450          (if (buffer-modified-p (car elt))
 451              "*" " ")
 452          (save-excursion
 453            (set-buffer (car elt))
 454            (if buffer-read-only "%" " "))
 455          (let ((file
 456                 (or (buffer-file-name (car elt))
 457                     (save-excursion
 458                       (set-buffer (car elt))
 459                       list-buffers-directory)
 460                     "")))
 461            (setq file (or (file-name-directory file)
 462                           ""))
 463            (if (> (length file) 20)
 464                (setq file (concat "..." (substring file -17))))
 465            file))
 466         (car elt)))
 467
 468 (defvar menu-bar-buffers-menu-list-buffers-entry nil)
 469
 470 (defun menu-bar-update-buffers ()
 471   ;; If user discards the Buffers item, play along.
 472   (and (lookup-key (current-global-map) [menu-bar buffer])
 473        (frame-or-buffer-changed-p)
 474        (let ((buffers (buffer-list))
 475              (frames (frame-list))
 476              buffers-menu frames-menu)
 477          ;; If requested, list only the N most recently selected buffers.
 478          (if (and (integerp buffers-menu-max-size)
 479                   (> buffers-menu-max-size 1))
 480              (if (> (length buffers) buffers-menu-max-size)
 481                  (setcdr (nthcdr buffers-menu-max-size buffers) nil)))
 482
 483          ;; Make the menu of buffers proper.
 484          (setq buffers-menu
 485                (cons "Select Buffer"
 486                      (let* ((buffer-list
 487                              (mapcar 'list buffers))
 488                             tail
 489                             (menu-bar-update-buffers-maxbuf 0)
 490                             (maxlen 0)
 491                             alist
 492                             head)
 493                        ;; Put into each element of buffer-list
 494                        ;; the name for actual display,
 495                        ;; perhaps truncated in the middle.
 496                        (setq tail buffer-list)
 497                        (while tail
 498                          (let ((name (buffer-name (car (car tail)))))
 499                            (setcdr (car tail)
 500                                    (if (> (length name) 27)
 501                                        (concat (substring name 0 12)
 502                                                "..."
 503                                                (substring name -12))
 504                                      name)))
 505                          (setq tail (cdr tail)))
 506                        ;; Compute the maximum length of any name.
 507                        (setq tail buffer-list)
 508                        (while tail
 509                          (or (eq ?\ (aref (cdr (car tail)) 0))
 510                              (setq menu-bar-update-buffers-maxbuf
 511                                    (max menu-bar-update-buffers-maxbuf
 512                                         (length (cdr (car tail))))))
 513                          (setq tail (cdr tail)))
 514                        ;; Set ALIST to an alist of the form
 515                        ;; ITEM-STRING . BUFFER
 516                        (setq tail buffer-list)
 517                        (while tail
 518                          (let ((elt (car tail)))
 519                            (or (eq ?\ (aref (cdr elt) 0))
 520                                (setq alist (cons
 521                                             (menu-bar-update-buffers-1 elt)
 522                                             alist)))
 523                            (and alist (> (length (car (car alist))) maxlen)
 524                                 (setq maxlen (length (car (car alist))))))
 525                          (setq tail (cdr tail)))
 526                        (setq alist (nreverse alist))
 527                        ;; Make the menu item for list-buffers
 528                        ;; or reuse the one we already have.
 529                        ;; The advantage in reusing one
 530                        ;; is that it already has the keyboard equivalent
 531                        ;; cached, so we save the time to look that up again.
 532                        (or menu-bar-buffers-menu-list-buffers-entry
 533                            (setq menu-bar-buffers-menu-list-buffers-entry
 534                                  (cons
 535                                   'list-buffers
 536                                   (cons
 537                                    ""
 538                                    'list-buffers))))
 539                        ;; Update the item string for menu's new width.
 540                        (setcar (cdr menu-bar-buffers-menu-list-buffers-entry)
 541                                (concat (make-string (max (- (/ maxlen 2) 8) 0)
 542                                                     ?\ )
 543                                        "List All Buffers"))
 544                        ;; Now make the actual list of items,
 545                        ;; ending with the list-buffers item.
 546                        (nconc (mapcar '(lambda (pair)
 547                                          ;; This is somewhat risque, to use
 548                                          ;; the buffer name itself as the event
 549                                          ;; type to define, but it works.
 550                                          ;; It would not work to use the buffer
 551                                          ;; since a buffer as an event has its
 552                                          ;; own meaning.
 553                                          (nconc (list (buffer-name (cdr pair))
 554                                                       (car pair)
 555                                                       (cons nil nil))
 556                                                 'menu-bar-select-buffer))
 557                                       alist)
 558                               (list menu-bar-buffers-menu-list-buffers-entry)))))
 559
 560
 561          ;; Make a Frames menu if we have more than one frame.
 562          (if (cdr frames)
 563              (setq frames-menu
 564                    (cons "Select Frame"
 565                          (mapcar '(lambda (frame)
 566                                     (nconc (list frame
 567                                                  (cdr (assq 'name
 568                                                             (frame-parameters frame)))
 569                                                  (cons nil nil))
 570                                            'menu-bar-select-frame))
 571                                  frames))))
 572          (if buffers-menu
 573              (setq buffers-menu (cons 'keymap buffers-menu)))
 574          (if frames-menu
 575              (setq frames-menu (cons 'keymap frames-menu)))
 576          (define-key (current-global-map) [menu-bar buffer]
 577            (cons "Buffers"
 578                  (if (and buffers-menu frames-menu)
 579                      (list 'keymap "Buffers and Frames"
 580                            (cons 'buffers (cons "Buffers" buffers-menu))
 581                            (cons 'frames (cons "Frames" frames-menu)))
 582                    (or buffers-menu frames-menu 'undefined)))))))
 583
 584 (add-hook 'menu-bar-update-hook 'menu-bar-update-buffers)
 585
 586 (menu-bar-update-buffers)
 587
 588 ;; this version is too slow
 589 ;;;(defun format-buffers-menu-line (buffer)
 590 ;;;  "Returns a string to represent the given buffer in the Buffer menu.
 591 ;;;nil means the buffer shouldn't be listed.  You can redefine this."
 592 ;;;  (if (string-match "\\` " (buffer-name buffer))
 593 ;;;      nil
 594 ;;;    (save-excursion
 595 ;;;     (set-buffer buffer)
 596 ;;;     (let ((size (buffer-size)))
 597 ;;;       (format "%s%s %-19s %6s %-15s %s"
 598 ;;;            (if (buffer-modified-p) "*" " ")
 599 ;;;            (if buffer-read-only "%" " ")
 600 ;;;            (buffer-name)
 601 ;;;            size
 602 ;;;            mode-name
 603 ;;;            (or (buffer-file-name) ""))))))
 604 \f
 605 ;;; Set up a menu bar menu for the minibuffer.
 606
 607 (mapcar
 608  (function
 609   (lambda (map)
 610     (define-key map [menu-bar minibuf]
 611       (cons "Minibuf" (make-sparse-keymap "Minibuf")))))
 612  (list minibuffer-local-ns-map
 613        minibuffer-local-must-match-map
 614        minibuffer-local-isearch-map
 615        minibuffer-local-map
 616        minibuffer-local-completion-map))
 617
 618 (mapcar
 619  (function
 620   (lambda (map)
 621     (define-key map [menu-bar minibuf ?\?]
 622       '("List Completions" . minibuffer-completion-help))
 623     (define-key map [menu-bar minibuf space]
 624       '("Complete Word" . minibuffer-complete-word))
 625     (define-key map [menu-bar minibuf tab]
 626       '("Complete" . 'minibuffer-complete))
 627     ))
 628  (list minibuffer-local-must-match-map
 629        minibuffer-local-completion-map))
 630
 631 (mapcar
 632  (function
 633   (lambda (map)
 634     (define-key map [menu-bar minibuf quit]
 635       '("Quit" . keyboard-escape-quit))
 636     (define-key map [menu-bar minibuf return]
 637       '("Enter" . exit-minibuffer))
 638     ))
 639  (list minibuffer-local-ns-map
 640        minibuffer-local-must-match-map
 641        minibuffer-local-isearch-map
 642        minibuffer-local-map
 643        minibuffer-local-completion-map))
 644 \f
 645 (defvar menu-bar-mode nil)
 646
 647 (defun menu-bar-mode (flag)
 648   "Toggle display of a menu bar on each frame.
 649 This command applies to all frames that exist and frames to be
 650 created in the future.
 651 With a numeric argument, if the argument is negative,
 652 turn off menu bars; otherwise, turn on menu bars."
 653  (interactive "P")
 654
 655   ;; Make menu-bar-mode and default-frame-alist consistent.
 656   (let ((default (assq 'menu-bar-lines default-frame-alist)))
 657     (if default
 658         (setq menu-bar-mode (not (eq (cdr default) 0)))
 659       (setq default-frame-alist
 660             (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 661                   default-frame-alist))))
 662
 663   ;; Toggle or set the mode, according to FLAG.
 664  (setq menu-bar-mode (if (null flag) (not menu-bar-mode)
 665                        (> (prefix-numeric-value flag) 0)))
 666
 667  ;; Apply it to default-frame-alist.
 668  (let ((parameter (assq 'menu-bar-lines default-frame-alist)))
 669    (if (consp parameter)
 670        (setcdr parameter (if menu-bar-mode 1 0))
 671      (setq default-frame-alist
 672            (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 673                  default-frame-alist))))
 674
 675  ;; Apply it to existing frames.
 676  (let ((frames (frame-list)))
 677    (while frames
 678      (let ((height (cdr (assq 'height (frame-parameters (car frames))))))
 679        (modify-frame-parameters (car frames)
 680                                 (list (cons 'menu-bar-lines
 681                                           (if menu-bar-mode 1 0))))
 682        (modify-frame-parameters (car frames)
 683                                 (list (cons 'height height))))
 684      (setq frames (cdr frames)))))
 685
 686 (provide 'menu-bar)
 687
 688 ;;; menu-bar.el ends here