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 ;;; User options:
  27
  28 (defvar buffers-menu-max-size 10
  29   "*Maximum number of entries which may appear on the Buffers menu.
  30 If this is 10, then only the ten most-recently-selected buffers are shown.
  31 If this is nil, then all buffers are shown.
  32 A large number or nil slows down menu responsiveness.")
  33
  34 ;;; Code:
  35
  36 ;; Don't clobber an existing menu-bar keymap, to preserve any menu-bar key
  37 ;; definitions made in loaddefs.el.
  38 (or (lookup-key global-map [menu-bar])
  39     (define-key global-map [menu-bar] (make-sparse-keymap "menu-bar")))
  40 (defvar menu-bar-help-menu (make-sparse-keymap "Help"))
  41
  42 ;; Force Help item to come last, after the major mode's own items.
  43 ;; The symbol used to be called `help', but that gets confused with the
  44 ;; help key.
  45 (setq menu-bar-final-items '(help-menu))
  46
  47 (define-key global-map [menu-bar help-menu] (cons "Help" menu-bar-help-menu))
  48 (defvar menu-bar-search-menu (make-sparse-keymap "Search"))
  49 (define-key global-map [menu-bar search] (cons "Search" menu-bar-search-menu))
  50 (defvar menu-bar-edit-menu (make-sparse-keymap "Edit"))
  51 (define-key global-map [menu-bar edit] (cons "Edit" menu-bar-edit-menu))
  52 (defvar menu-bar-tools-menu (make-sparse-keymap "Tools"))
  53 (define-key global-map [menu-bar tools] (cons "Tools" menu-bar-tools-menu))
  54 (defvar menu-bar-files-menu (make-sparse-keymap "Files"))
  55 (define-key global-map [menu-bar files] (cons "Files" menu-bar-files-menu))
  56
  57 ;; This alias is for compatibility with 19.28 and before.
  58 (defvar menu-bar-file-menu menu-bar-files-menu)
  59 \f
  60 (defvar vc-menu-map (make-sparse-keymap "Version Control"))
  61
  62 (define-key menu-bar-tools-menu [calendar] '("Display Calendar" . calendar))
  63 (define-key menu-bar-tools-menu [rmail] '("Read Mail" . rmail))
  64 (define-key menu-bar-tools-menu [gnus] '("Read Net News" . gnus))
  65
  66 (define-key menu-bar-tools-menu [separator-vc]
  67   '("--"))
  68
  69 (define-key menu-bar-tools-menu [vc-menu]
  70   (cons "Version Control" vc-menu-map))
  71
  72 (define-key menu-bar-tools-menu [separator-compare]
  73   '("--"))
  74
  75 (define-key menu-bar-tools-menu [epatch]
  76   '("Apply Patch" . menu-bar-epatch-menu))
  77 (define-key menu-bar-tools-menu [ediff-merge]
  78   '("Merge" . menu-bar-ediff-merge-menu))
  79 (define-key menu-bar-tools-menu [compare]
  80   '("Compare" . menu-bar-ediff-menu))
  81
  82 (define-key menu-bar-tools-menu [separator-print]
  83   '("--"))
  84
  85 (put 'print-region 'menu-enable 'mark-active)
  86 (put 'ps-print-region-with-faces 'menu-enable 'mark-active)
  87
  88 (define-key menu-bar-tools-menu [ps-print-region]
  89   '("Postscript Print Region" . ps-print-region-with-faces))
  90 (define-key menu-bar-tools-menu [ps-print-buffer]
  91   '("Postscript Print Buffer" . ps-print-buffer-with-faces))
  92 (define-key menu-bar-tools-menu [print-region]
  93   '("Print Region" . print-region))
  94 (define-key menu-bar-tools-menu [print-buffer]
  95   '("Print Buffer" . print-buffer))
  96 \f
  97 (define-key menu-bar-files-menu [exit-emacs]
  98   '("Exit Emacs" . save-buffers-kill-emacs))
  99
 100 (define-key menu-bar-files-menu [separator-exit]
 101   '("--"))
 102
 103 (define-key menu-bar-files-menu [one-window]
 104   '("One Window" . delete-other-windows))
 105
 106 (define-key menu-bar-files-menu [split-window]
 107   '("Split Window" . split-window-vertically))
 108
 109 (if (fboundp 'delete-frame)
 110     (progn
 111       ;; Don't use delete-frame as event name
 112       ;; because that is a special event.
 113       (define-key menu-bar-files-menu [delete-this-frame]
 114         '("Delete Frame" . delete-frame))
 115       (define-key menu-bar-files-menu [make-frame-on-display]
 116         '("Open New Display..." . make-frame-on-display))
 117       (define-key menu-bar-files-menu [make-frame]
 118         '("Make New Frame" . make-frame))))
 119
 120 (define-key menu-bar-files-menu [separator-buffers]
 121   '("--"))
 122
 123 (define-key menu-bar-files-menu [kill-buffer]
 124   '("Kill Current Buffer" . kill-this-buffer))
 125 (define-key menu-bar-files-menu [insert-file]
 126   '("Insert File..." . insert-file))
 127 (define-key menu-bar-files-menu [revert-buffer]
 128   '("Revert Buffer" . revert-buffer))
 129 (define-key menu-bar-files-menu [write-file]
 130   '("Save Buffer As..." . write-file))
 131 (define-key menu-bar-files-menu [save-buffer] '("Save Buffer" . save-buffer))
 132 (define-key menu-bar-files-menu [dired] '("Open Directory..." . dired))
 133 (define-key menu-bar-files-menu [open-file] '("Open File..." . find-file))
 134
 135 \f
 136 (defun nonincremental-search-forward (string)
 137   "Read a string and search for it nonincrementally."
 138   (interactive "sSearch for string: ")
 139   (if (equal string "")
 140       (search-forward (car search-ring))
 141     (isearch-update-ring string nil)
 142     (search-forward string)))
 143
 144 (defun nonincremental-search-backward (string)
 145   "Read a string and search backward for it nonincrementally."
 146   (interactive "sSearch for string: ")
 147   (if (equal string "")
 148       (search-backward (car search-ring))
 149     (isearch-update-ring string nil)
 150     (search-backward string)))
 151
 152 (defun nonincremental-re-search-forward (string)
 153   "Read a regular expression and search for it nonincrementally."
 154   (interactive "sSearch for regexp: ")
 155   (if (equal string "")
 156       (re-search-forward (car regexp-search-ring))
 157     (isearch-update-ring string t)
 158     (re-search-forward string)))
 159
 160 (defun nonincremental-re-search-backward (string)
 161   "Read a regular expression and search backward for it nonincrementally."
 162   (interactive "sSearch for regexp: ")
 163   (if (equal string "")
 164       (re-search-backward (car regexp-search-ring))
 165     (isearch-update-ring string t)
 166     (re-search-backward string)))
 167
 168 (defun nonincremental-repeat-search-forward ()
 169   "Search forward for the previous search string."
 170   (interactive)
 171   (search-forward (car search-ring)))
 172
 173 (defun nonincremental-repeat-search-backward ()
 174   "Search backward for the previous search string."
 175   (interactive)
 176   (search-backward (car search-ring)))
 177
 178 (defun nonincremental-repeat-re-search-forward ()
 179   "Search forward for the previous regular expression."
 180   (interactive)
 181   (re-search-forward (car regexp-search-ring)))
 182
 183 (defun nonincremental-repeat-re-search-backward ()
 184   "Search backward for the previous regular expression."
 185   (interactive)
 186   (re-search-backward (car regexp-search-ring)))
 187
 188 (define-key menu-bar-search-menu [query-replace-regexp]
 189   '("Query Replace Regexp..." . query-replace-regexp))
 190 (define-key menu-bar-search-menu [query-replace]
 191   '("Query Replace..." . query-replace))
 192 (define-key menu-bar-search-menu [find-tag]
 193   '("Find Tag..." . find-tag))
 194 (define-key menu-bar-search-menu [bookmark]
 195   '("Bookmarks" . menu-bar-bookmark-map))
 196
 197 (define-key menu-bar-search-menu [separator-search]
 198   '("--"))
 199
 200 (define-key menu-bar-search-menu [nonincremental-repeat-re-search-back]
 201   '("Repeat Regexp Backwards" . nonincremental-repeat-re-search-backward))
 202 (define-key menu-bar-search-menu [nonincremental-repeat-search-back]
 203   '("Repeat Backwards" . nonincremental-repeat-search-backward))
 204 (define-key menu-bar-search-menu [nonincremental-repeat-re-search-fwd]
 205   '("Repeat Regexp" . nonincremental-repeat-re-search-forward))
 206 (define-key menu-bar-search-menu [nonincremental-repeat-search-fwd]
 207   '("Repeat Search" . nonincremental-repeat-search-forward))
 208
 209 (define-key menu-bar-search-menu [separator-repeat]
 210   '("--"))
 211
 212 (define-key menu-bar-search-menu [re-search-back]
 213   '("Regexp Search Backwards..." . nonincremental-re-search-backward))
 214 (define-key menu-bar-search-menu [search-back]
 215   '("Search Backwards..." . nonincremental-search-backward))
 216 (define-key menu-bar-search-menu [re-search-fwd]
 217   '("Regexp Search..." . nonincremental-re-search-forward))
 218 (define-key menu-bar-search-menu [search-fwd]
 219   '("Search..." . nonincremental-search-forward))
 220 \f
 221 (if (fboundp 'start-process)
 222     (define-key menu-bar-edit-menu [spell] '("Spell" . ispell-menu-map)))
 223 (define-key menu-bar-edit-menu [fill] '("Fill" . fill-region))
 224 (define-key menu-bar-edit-menu [props] '("Text Properties" . facemenu-menu))
 225
 226 (define-key menu-bar-edit-menu [separator-edit]
 227   '("--"))
 228
 229 (define-key menu-bar-edit-menu [clear] '("Clear" . delete-region))
 230
 231 (define-key menu-bar-edit-menu [paste] '("Paste Most Recent" . yank))
 232
 233 (defvar yank-menu (cons "Select Yank" nil))
 234 (fset 'yank-menu (cons 'keymap yank-menu))
 235 (define-key menu-bar-edit-menu [select-paste] '("Select and Paste" . yank-menu))
 236 (define-key menu-bar-edit-menu [copy] '("Copy" . menu-bar-kill-ring-save))
 237 (define-key menu-bar-edit-menu [cut] '("Cut" . kill-region))
 238 (define-key menu-bar-edit-menu [undo] '("Undo" . undo))
 239
 240 (defun menu-bar-kill-ring-save (beg end)
 241   (interactive "r")
 242   (if (mouse-region-match)
 243       (message "Select a region with the mouse does `copy' automatically")
 244     (kill-ring-save beg end)))
 245
 246 (put 'fill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 247 (put 'kill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 248 (put 'menu-bar-kill-ring-save 'menu-enable 'mark-active)
 249 (put 'yank 'menu-enable '(and (x-selection-exists-p) (not buffer-read-only)))
 250 (put 'yank-menu 'menu-enable '(and (cdr yank-menu) (not buffer-read-only)))
 251 (put 'delete-region 'menu-enable '(and mark-active
 252                                        (not buffer-read-only)
 253                                        (not (mouse-region-match))))
 254 (put 'undo 'menu-enable '(and (not buffer-read-only)
 255                               (if (eq last-command 'undo)
 256                                   pending-undo-list
 257                                 (consp buffer-undo-list))))
 258 (put 'query-replace 'menu-enable '(not buffer-read-only))
 259 (put 'query-replace-regexp 'menu-enable '(not buffer-read-only))
 260
 261 (autoload 'ispell-menu-map "ispell" nil t 'keymap)
 262
 263 ;; These are alternative definitions for the cut, paste and copy
 264 ;; menu items.  Use them if your system expects these to use the clipboard.
 265
 266 (put 'clipboard-kill-region 'menu-enable 'mark-active)
 267 (put 'clipboard-kill-ring-save 'menu-enable 'mark-active)
 268 (put 'clipboard-yank 'menu-enable
 269      '(or (x-selection-exists-p) (x-selection-exists-p 'CLIPBOARD)))
 270
 271 (defun clipboard-yank ()
 272   "Reinsert the last stretch of killed text, or the clipboard contents."
 273   (interactive)
 274   (let ((x-select-enable-clipboard t))
 275     (yank)))
 276
 277 (defun clipboard-kill-ring-save (beg end)
 278   "Copy region to kill ring, and save in the X clipboard."
 279   (interactive "r")
 280   (let ((x-select-enable-clipboard t))
 281     (kill-ring-save beg end)))
 282
 283 (defun clipboard-kill-region (beg end)
 284   "Kill the region, and save it in the X clipboard."
 285   (interactive "r")
 286   (let ((x-select-enable-clipboard t))
 287     (kill-region beg end)))
 288
 289 (defun menu-bar-enable-clipboard ()
 290   "Make CUT, PASTE and COPY (keys and menu bar items) use the clipboard.
 291 Do the same for the keys of the same name."
 292   (interactive)
 293   ;; We can't use constant list structure here because it becomes pure,
 294   ;; and because it gets modified with cache data.
 295   (define-key menu-bar-edit-menu [paste]
 296     (cons "Paste" 'clipboard-yank))
 297   (define-key menu-bar-edit-menu [copy]
 298     (cons "Copy" 'clipboard-kill-ring-save))
 299   (define-key menu-bar-edit-menu [cut]
 300     (cons "Cut" 'clipboard-kill-region))
 301
 302   (define-key global-map [f20] 'clipboard-kill-region)
 303   (define-key global-map [f16] 'clipboard-kill-ring-save)
 304   (define-key global-map [f18] 'clipboard-yank)
 305   ;; X11R6 versions
 306   (define-key global-map [cut] 'clipboard-kill-region)
 307   (define-key global-map [copy] 'clipboard-kill-ring-save)
 308   (define-key global-map [paste] 'clipboard-yank))
 309 \f
 310 (define-key menu-bar-help-menu [emacs-version]
 311   '("Show Version" . emacs-version))
 312 (define-key menu-bar-help-menu [report-emacs-bug]
 313   '("Send Bug Report..." . report-emacs-bug))
 314 (define-key menu-bar-help-menu [finder-by-keyword]
 315   '("Find Lisp Packages..." . finder-by-keyword))
 316 (define-key menu-bar-help-menu [emacs-tutorial]
 317   '("Emacs Tutorial" . help-with-tutorial))
 318 (define-key menu-bar-help-menu [man]
 319   '("Man..." . manual-entry))
 320 (define-key menu-bar-help-menu [describe-variable]
 321   '("Describe Variable..." . describe-variable))
 322 (define-key menu-bar-help-menu [describe-function]
 323   '("Describe Function..." . describe-function))
 324 (define-key menu-bar-help-menu [describe-key]
 325   '("Describe Key..." . describe-key))
 326 (define-key menu-bar-help-menu [list-keybindings]
 327   '("List Keybindings" . describe-bindings))
 328 (define-key menu-bar-help-menu [command-apropos]
 329   '("Command Apropos..." . command-apropos))
 330 (define-key menu-bar-help-menu [describe-mode]
 331   '("Describe Mode" . describe-mode))
 332 (define-key menu-bar-help-menu [info] '("Browse Manuals" . info))
 333 (define-key menu-bar-help-menu [emacs-faq] '("Emacs FAQ" . view-emacs-FAQ))
 334 (define-key menu-bar-help-menu [emacs-news] '("Emacs News" . view-emacs-news))
 335
 336 (defun kill-this-buffer ()      ; for the menubar
 337   "Kills the current buffer."
 338   (interactive)
 339   (kill-buffer (current-buffer)))
 340
 341 (defun kill-this-buffer-enabled-p ()
 342   (let ((count 0)
 343         (buffers (buffer-list)))
 344     (while buffers
 345       (or (string-match "^ " (buffer-name (car buffers)))
 346           (setq count (1+ count)))
 347       (setq buffers (cdr buffers)))
 348     (and (not (window-minibuffer-p (selected-window)))
 349          (> count 1))))
 350
 351 (put 'kill-this-buffer 'menu-enable '(kill-this-buffer-enabled-p))
 352
 353 (put 'save-buffer 'menu-enable
 354      '(and (buffer-modified-p)
 355            (not (window-minibuffer-p (selected-window)))))
 356
 357 (put 'write-file 'menu-enable
 358      '(not (window-minibuffer-p (selected-window))))
 359
 360 (put 'find-file 'menu-enable
 361      '(not (window-minibuffer-p (selected-window))))
 362
 363 (put 'dired 'menu-enable
 364      '(not (window-minibuffer-p (selected-window))))
 365
 366 (put 'insert-file 'menu-enable
 367      '(not (window-minibuffer-p (selected-window))))
 368
 369 (put 'revert-buffer 'menu-enable
 370      '(or revert-buffer-function revert-buffer-insert-file-contents-function
 371           (and (buffer-file-name)
 372                (or (buffer-modified-p)
 373                    (not (verify-visited-file-modtime (current-buffer)))))))
 374
 375 ;; Permit deleting frame if it would leave a visible or iconified frame.
 376 (put 'delete-frame 'menu-enable
 377      '(delete-frame-enabled-p))
 378
 379 (defun delete-frame-enabled-p ()
 380   "Return non-nil if `delete-frame' should be enabled in the menu bar."
 381   (let ((frames (frame-list))
 382               (count 0))
 383           (while frames
 384             (if (frame-visible-p (car frames))
 385                 (setq count (1+ count)))
 386             (setq frames (cdr frames)))
 387           (> count 1)))
 388
 389 (put 'advertised-undo 'menu-enable
 390      '(and (not (eq t buffer-undo-list))
 391            (if (eq last-command 'undo)
 392                (and (boundp 'pending-undo-list)
 393                     pending-undo-list)
 394              buffer-undo-list)))
 395
 396 (defvar yank-menu-length 20
 397   "*Maximum length to display in the yank-menu.")
 398
 399 (defun menu-bar-update-yank-menu (string old)
 400   (let ((front (car (cdr yank-menu)))
 401         (menu-string (if (<= (length string) yank-menu-length)
 402                          string
 403                        (concat
 404                         (substring string 0 (/ yank-menu-length 2))
 405                         "..."
 406                         (substring string (- (/ yank-menu-length 2)))))))
 407     ;; Don't let the menu string be all dashes
 408     ;; because that has a special meaning in a menu.
 409     (if (string-match "\\`-+\\'" menu-string)
 410         (setq menu-string (concat menu-string " ")))
 411     ;; If we're supposed to be extending an existing string, and that
 412     ;; string really is at the front of the menu, then update it in place.
 413     (if (and old (or (eq old (car front))
 414                      (string= old (car front))))
 415         (progn
 416           (setcar front string)
 417           (setcar (cdr front) menu-string))
 418       (setcdr yank-menu
 419               (cons
 420                (cons string (cons menu-string 'menu-bar-select-yank))
 421                (cdr yank-menu)))))
 422   (if (> (length (cdr yank-menu)) kill-ring-max)
 423       (setcdr (nthcdr kill-ring-max yank-menu) nil)))
 424
 425 (defun menu-bar-select-yank ()
 426   (interactive "*")
 427   (push-mark (point))
 428   (insert last-command-event))
 429 \f
 430 ;; This definition is just to show what this looks like.
 431 ;; It gets overridden below when menu-bar-update-buffers is called.
 432 (define-key global-map [menu-bar buffer]
 433   (cons "Buffers" (make-sparse-keymap "Buffers")))
 434
 435 (defvar list-buffers-directory nil)
 436
 437 (defvar menu-bar-update-buffers-maxbuf)
 438
 439 (defun menu-bar-select-buffer ()
 440   (interactive)
 441   (switch-to-buffer last-command-event))
 442
 443 (defun menu-bar-select-frame ()
 444   (interactive)
 445   (make-frame-visible last-command-event)
 446   (raise-frame last-command-event)
 447   (select-frame last-command-event))
 448
 449 (defun menu-bar-update-buffers-1 (elt)
 450   (cons (format
 451          (format "%%%ds  %%s%%s  %%s" menu-bar-update-buffers-maxbuf)
 452          (cdr elt)
 453          (if (buffer-modified-p (car elt))
 454              "*" " ")
 455          (save-excursion
 456            (set-buffer (car elt))
 457            (if buffer-read-only "%" " "))
 458          (let ((file
 459                 (or (buffer-file-name (car elt))
 460                     (save-excursion
 461                       (set-buffer (car elt))
 462                       list-buffers-directory)
 463                     "")))
 464            (setq file (or (file-name-directory file)
 465                           ""))
 466            (if (> (length file) 20)
 467                (setq file (concat "..." (substring file -17))))
 468            file))
 469         (car elt)))
 470
 471 (defvar menu-bar-buffers-menu-list-buffers-entry nil)
 472
 473 (defun menu-bar-update-buffers ()
 474   ;; If user discards the Buffers item, play along.
 475   (and (lookup-key (current-global-map) [menu-bar buffer])
 476        (frame-or-buffer-changed-p)
 477        (let ((buffers (buffer-list))
 478              (frames (frame-list))
 479              buffers-menu frames-menu)
 480          ;; If requested, list only the N most recently selected buffers.
 481          (if (and (integerp buffers-menu-max-size)
 482                   (> buffers-menu-max-size 1))
 483              (if (> (length buffers) buffers-menu-max-size)
 484                  (setcdr (nthcdr buffers-menu-max-size buffers) nil)))
 485
 486          ;; Make the menu of buffers proper.
 487          (setq buffers-menu
 488                (cons "Select Buffer"
 489                      (let* ((buffer-list
 490                              (mapcar 'list buffers))
 491                             tail
 492                             (menu-bar-update-buffers-maxbuf 0)
 493                             (maxlen 0)
 494                             alist
 495                             head)
 496                        ;; Put into each element of buffer-list
 497                        ;; the name for actual display,
 498                        ;; perhaps truncated in the middle.
 499                        (setq tail buffer-list)
 500                        (while tail
 501                          (let ((name (buffer-name (car (car tail)))))
 502                            (setcdr (car tail)
 503                                    (if (> (length name) 27)
 504                                        (concat (substring name 0 12)
 505                                                "..."
 506                                                (substring name -12))
 507                                      name)))
 508                          (setq tail (cdr tail)))
 509                        ;; Compute the maximum length of any name.
 510                        (setq tail buffer-list)
 511                        (while tail
 512                          (or (eq ?\ (aref (cdr (car tail)) 0))
 513                              (setq menu-bar-update-buffers-maxbuf
 514                                    (max menu-bar-update-buffers-maxbuf
 515                                         (length (cdr (car tail))))))
 516                          (setq tail (cdr tail)))
 517                        ;; Set ALIST to an alist of the form
 518                        ;; ITEM-STRING . BUFFER
 519                        (setq tail buffer-list)
 520                        (while tail
 521                          (let ((elt (car tail)))
 522                            (or (eq ?\ (aref (cdr elt) 0))
 523                                (setq alist (cons
 524                                             (menu-bar-update-buffers-1 elt)
 525                                             alist)))
 526                            (and alist (> (length (car (car alist))) maxlen)
 527                                 (setq maxlen (length (car (car alist))))))
 528                          (setq tail (cdr tail)))
 529                        (setq alist (nreverse alist))
 530                        ;; Make the menu item for list-buffers
 531                        ;; or reuse the one we already have.
 532                        ;; The advantage in reusing one
 533                        ;; is that it already has the keyboard equivalent
 534                        ;; cached, so we save the time to look that up again.
 535                        (or menu-bar-buffers-menu-list-buffers-entry
 536                            (setq menu-bar-buffers-menu-list-buffers-entry
 537                                  (cons
 538                                   'list-buffers
 539                                   (cons
 540                                    ""
 541                                    'list-buffers))))
 542                        ;; Update the item string for menu's new width.
 543                        (setcar (cdr menu-bar-buffers-menu-list-buffers-entry)
 544                                (concat (make-string (max (- (/ maxlen 2) 8) 0)
 545                                                     ?\ )
 546                                        "List All Buffers"))
 547                        ;; Now make the actual list of items,
 548                        ;; ending with the list-buffers item.
 549                        (nconc (mapcar '(lambda (pair)
 550                                          ;; This is somewhat risque, to use
 551                                          ;; the buffer name itself as the event
 552                                          ;; type to define, but it works.
 553                                          ;; It would not work to use the buffer
 554                                          ;; since a buffer as an event has its
 555                                          ;; own meaning.
 556                                          (nconc (list (buffer-name (cdr pair))
 557                                                       (car pair)
 558                                                       (cons nil nil))
 559                                                 'menu-bar-select-buffer))
 560                                       alist)
 561                               (list menu-bar-buffers-menu-list-buffers-entry)))))
 562
 563
 564          ;; Make a Frames menu if we have more than one frame.
 565          (if (cdr frames)
 566              (setq frames-menu
 567                    (cons "Select Frame"
 568                          (mapcar '(lambda (frame)
 569                                     (nconc (list frame
 570                                                  (cdr (assq 'name
 571                                                             (frame-parameters frame)))
 572                                                  (cons nil nil))
 573                                            'menu-bar-select-frame))
 574                                  frames))))
 575          (if buffers-menu
 576              (setq buffers-menu (cons 'keymap buffers-menu)))
 577          (if frames-menu
 578              (setq frames-menu (cons 'keymap frames-menu)))
 579          (define-key (current-global-map) [menu-bar buffer]
 580            (cons "Buffers"
 581                  (if (and buffers-menu frames-menu)
 582                      (list 'keymap "Buffers and Frames"
 583                            (cons 'buffers (cons "Buffers" buffers-menu))
 584                            (cons 'frames (cons "Frames" frames-menu)))
 585                    (or buffers-menu frames-menu 'undefined)))))))
 586
 587 (add-hook 'menu-bar-update-hook 'menu-bar-update-buffers)
 588
 589 (menu-bar-update-buffers)
 590
 591 ;; this version is too slow
 592 ;;;(defun format-buffers-menu-line (buffer)
 593 ;;;  "Returns a string to represent the given buffer in the Buffer menu.
 594 ;;;nil means the buffer shouldn't be listed.  You can redefine this."
 595 ;;;  (if (string-match "\\` " (buffer-name buffer))
 596 ;;;      nil
 597 ;;;    (save-excursion
 598 ;;;     (set-buffer buffer)
 599 ;;;     (let ((size (buffer-size)))
 600 ;;;       (format "%s%s %-19s %6s %-15s %s"
 601 ;;;            (if (buffer-modified-p) "*" " ")
 602 ;;;            (if buffer-read-only "%" " ")
 603 ;;;            (buffer-name)
 604 ;;;            size
 605 ;;;            mode-name
 606 ;;;            (or (buffer-file-name) ""))))))
 607 \f
 608 ;;; Set up a menu bar menu for the minibuffer.
 609
 610 (mapcar
 611  (function
 612   (lambda (map)
 613     (define-key map [menu-bar minibuf]
 614       (cons "Minibuf" (make-sparse-keymap "Minibuf")))))
 615  (list minibuffer-local-ns-map
 616        minibuffer-local-must-match-map
 617        minibuffer-local-isearch-map
 618        minibuffer-local-map
 619        minibuffer-local-completion-map))
 620
 621 (mapcar
 622  (function
 623   (lambda (map)
 624     (define-key map [menu-bar minibuf ?\?]
 625       '("List Completions" . minibuffer-completion-help))
 626     (define-key map [menu-bar minibuf space]
 627       '("Complete Word" . minibuffer-complete-word))
 628     (define-key map [menu-bar minibuf tab]
 629       '("Complete" . minibuffer-complete))
 630     ))
 631  (list minibuffer-local-must-match-map
 632        minibuffer-local-completion-map))
 633
 634 (mapcar
 635  (function
 636   (lambda (map)
 637     (define-key map [menu-bar minibuf quit]
 638       '("Quit" . keyboard-escape-quit))
 639     (define-key map [menu-bar minibuf return]
 640       '("Enter" . exit-minibuffer))
 641     ))
 642  (list minibuffer-local-ns-map
 643        minibuffer-local-must-match-map
 644        minibuffer-local-isearch-map
 645        minibuffer-local-map
 646        minibuffer-local-completion-map))
 647 \f
 648 (defvar menu-bar-mode nil)
 649
 650 (defun menu-bar-mode (flag)
 651   "Toggle display of a menu bar on each frame.
 652 This command applies to all frames that exist and frames to be
 653 created in the future.
 654 With a numeric argument, if the argument is negative,
 655 turn off menu bars; otherwise, turn on menu bars."
 656  (interactive "P")
 657
 658   ;; Make menu-bar-mode and default-frame-alist consistent.
 659   (let ((default (assq 'menu-bar-lines default-frame-alist)))
 660     (if default
 661         (setq menu-bar-mode (not (eq (cdr default) 0)))
 662       (setq default-frame-alist
 663             (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 664                   default-frame-alist))))
 665
 666   ;; Toggle or set the mode, according to FLAG.
 667  (setq menu-bar-mode (if (null flag) (not menu-bar-mode)
 668                        (> (prefix-numeric-value flag) 0)))
 669
 670  ;; Apply it to default-frame-alist.
 671  (let ((parameter (assq 'menu-bar-lines default-frame-alist)))
 672    (if (consp parameter)
 673        (setcdr parameter (if menu-bar-mode 1 0))
 674      (setq default-frame-alist
 675            (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 676                  default-frame-alist))))
 677
 678  ;; Apply it to existing frames.
 679  (let ((frames (frame-list)))
 680    (while frames
 681      (let ((height (cdr (assq 'height (frame-parameters (car frames))))))
 682        (modify-frame-parameters (car frames)
 683                                 (list (cons 'menu-bar-lines
 684                                           (if menu-bar-mode 1 0))))
 685        (modify-frame-parameters (car frames)
 686                                 (list (cons 'height height))))
 687      (setq frames (cdr frames)))))
 688
 689 (provide 'menu-bar)
 690
 691 ;;; menu-bar.el ends here