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