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 ;; This is just one element of the ediff menu--the first.
 127 (define-key menu-bar-ediff-menu [window]
 128   '("This Window And Next Window" . compare-windows))
 129 \f
 130 (defun nonincremental-search-forward (string)
 131   "Read a string and search for it nonincrementally."
 132   (interactive "sSearch for string: ")
 133   (if (equal string "")
 134       (search-forward (car search-ring))
 135     (isearch-update-ring string nil)
 136     (search-forward string)))
 137
 138 (defun nonincremental-search-backward (string)
 139   "Read a string and search backward for it nonincrementally."
 140   (interactive "sSearch for string: ")
 141   (if (equal string "")
 142       (search-backward (car search-ring))
 143     (isearch-update-ring string nil)
 144     (search-backward string)))
 145
 146 (defun nonincremental-re-search-forward (string)
 147   "Read a regular expression and search for it nonincrementally."
 148   (interactive "sSearch for regexp: ")
 149   (if (equal string "")
 150       (re-search-forward (car regexp-search-ring))
 151     (isearch-update-ring string t)
 152     (re-search-forward string)))
 153
 154 (defun nonincremental-re-search-backward (string)
 155   "Read a regular expression and search backward for it nonincrementally."
 156   (interactive "sSearch for regexp: ")
 157   (if (equal string "")
 158       (re-search-backward (car regexp-search-ring))
 159     (isearch-update-ring string t)
 160     (re-search-backward string)))
 161
 162 (defun nonincremental-repeat-search-forward ()
 163   "Search forward for the previous search string."
 164   (interactive)
 165   (search-forward (car search-ring)))
 166
 167 (defun nonincremental-repeat-search-backward ()
 168   "Search backward for the previous search string."
 169   (interactive)
 170   (search-backward (car search-ring)))
 171
 172 (defun nonincremental-repeat-re-search-forward ()
 173   "Search forward for the previous regular expression."
 174   (interactive)
 175   (re-search-forward (car regexp-search-ring)))
 176
 177 (defun nonincremental-repeat-re-search-backward ()
 178   "Search backward for the previous regular expression."
 179   (interactive)
 180   (re-search-backward (car regexp-search-ring)))
 181
 182 (define-key menu-bar-search-menu [query-replace-regexp]
 183   '("Query Replace Regexp..." . query-replace-regexp))
 184 (define-key menu-bar-search-menu [query-replace]
 185   '("Query Replace..." . query-replace))
 186 (define-key menu-bar-search-menu [find-tag]
 187   '("Find Tag..." . find-tag))
 188 (define-key menu-bar-search-menu [bookmark]
 189   '("Bookmarks" . menu-bar-bookmark-map))
 190
 191 (define-key menu-bar-search-menu [separator-search]
 192   '("--"))
 193
 194 (define-key menu-bar-search-menu [nonincremental-repeat-re-search-back]
 195   '("Repeat Regexp Backwards" . nonincremental-repeat-re-search-backward))
 196 (define-key menu-bar-search-menu [nonincremental-repeat-search-back]
 197   '("Repeat Backwards" . nonincremental-repeat-search-backward))
 198 (define-key menu-bar-search-menu [nonincremental-repeat-re-search-fwd]
 199   '("Repeat Regexp" . nonincremental-repeat-re-search-forward))
 200 (define-key menu-bar-search-menu [nonincremental-repeat-search-fwd]
 201   '("Repeat Search" . nonincremental-repeat-search-forward))
 202
 203 (define-key menu-bar-search-menu [separator-repeat]
 204   '("--"))
 205
 206 (define-key menu-bar-search-menu [re-search-back]
 207   '("Regexp Search Backwards..." . nonincremental-re-search-backward))
 208 (define-key menu-bar-search-menu [search-back]
 209   '("Search Backwards..." . nonincremental-search-backward))
 210 (define-key menu-bar-search-menu [re-search-fwd]
 211   '("Regexp Search..." . nonincremental-re-search-forward))
 212 (define-key menu-bar-search-menu [search-fwd]
 213   '("Search..." . nonincremental-search-forward))
 214 \f
 215 (if (fboundp 'start-process)
 216     (define-key menu-bar-edit-menu [spell] '("Spell" . ispell-menu-map)))
 217 (define-key menu-bar-edit-menu [fill] '("Fill" . fill-region))
 218 (define-key menu-bar-edit-menu [props] '("Text Properties" . facemenu-menu))
 219
 220 (define-key menu-bar-edit-menu [separator-edit]
 221   '("--"))
 222
 223 (define-key menu-bar-edit-menu [clear] '("Clear" . delete-region))
 224
 225 (define-key menu-bar-edit-menu [paste] '("Paste Most Recent" . yank))
 226
 227 (defvar yank-menu (cons "Select Yank" nil))
 228 (fset 'yank-menu (cons 'keymap yank-menu))
 229 (define-key menu-bar-edit-menu [select-paste] '("Select and Paste" . yank-menu))
 230 (define-key menu-bar-edit-menu [copy] '("Copy" . menu-bar-kill-ring-save))
 231 (define-key menu-bar-edit-menu [cut] '("Cut" . kill-region))
 232 (define-key menu-bar-edit-menu [undo] '("Undo" . undo))
 233
 234 (defun menu-bar-kill-ring-save (beg end)
 235   (interactive "r")
 236   (if (mouse-region-match)
 237       (message "Select a region with the mouse does `copy' automatically")
 238     (kill-ring-save beg end)))
 239
 240 (put 'fill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 241 (put 'kill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 242 (put 'menu-bar-kill-ring-save 'menu-enable 'mark-active)
 243 (put 'yank 'menu-enable '(and (x-selection-exists-p) (not buffer-read-only)))
 244 (put 'yank-menu 'menu-enable '(and (cdr yank-menu) (not buffer-read-only)))
 245 (put 'delete-region 'menu-enable '(and mark-active
 246                                        (not buffer-read-only)
 247                                        (not (mouse-region-match))))
 248 (put 'undo 'menu-enable '(and (not buffer-read-only)
 249                               (if (eq last-command 'undo)
 250                                   pending-undo-list
 251                                 (consp buffer-undo-list))))
 252 (put 'query-replace 'menu-enable '(not buffer-read-only))
 253 (put 'query-replace-regexp 'menu-enable '(not buffer-read-only))
 254
 255 (autoload 'ispell-menu-map "ispell" nil t 'keymap)
 256
 257 ;; These are alternative definitions for the cut, paste and copy
 258 ;; menu items.  Use them if your system expects these to use the clipboard.
 259
 260 (put 'clipboard-kill-region 'menu-enable 'mark-active)
 261 (put 'clipboard-kill-ring-save 'menu-enable 'mark-active)
 262 (put 'clipboard-yank 'menu-enable
 263      '(or (x-selection-exists-p) (x-selection-exists-p 'CLIPBOARD)))
 264
 265 (defun clipboard-yank ()
 266   "Reinsert the last stretch of killed text, or the clipboard contents."
 267   (interactive)
 268   (let ((x-select-enable-clipboard t))
 269     (yank)))
 270
 271 (defun clipboard-kill-ring-save (beg end)
 272   "Copy region to kill ring, and save in the X clipboard."
 273   (interactive "r")
 274   (let ((x-select-enable-clipboard t))
 275     (kill-ring-save beg end)))
 276
 277 (defun clipboard-kill-region (beg end)
 278   "Kill the region, and save it in the X clipboard."
 279   (interactive "r")
 280   (let ((x-select-enable-clipboard t))
 281     (kill-region beg end)))
 282
 283 (defun menu-bar-enable-clipboard ()
 284   "Make CUT, PASTE and COPY (keys and menu bar items) use the clipboard.
 285 Do the same for the keys of the same name."
 286   (interactive)
 287   ;; We can't use constant list structure here because it becomes pure,
 288   ;; and because it gets modified with cache data.
 289   (define-key menu-bar-edit-menu [paste]
 290     (cons "Paste" 'clipboard-yank))
 291   (define-key menu-bar-edit-menu [copy]
 292     (cons "Copy" 'clipboard-kill-ring-save))
 293   (define-key menu-bar-edit-menu [cut]
 294     (cons "Cut" 'clipboard-kill-region))
 295
 296   (define-key global-map [f20] 'clipboard-kill-region)
 297   (define-key global-map [f16] 'clipboard-kill-ring-save)
 298   (define-key global-map [f18] 'clipboard-yank)
 299   ;; X11R6 versions
 300   (define-key global-map [cut] 'clipboard-kill-region)
 301   (define-key global-map [copy] 'clipboard-kill-ring-save)
 302   (define-key global-map [paste] 'clipboard-yank))
 303 \f
 304 (define-key menu-bar-help-menu [emacs-version]
 305   '("Show Version" . emacs-version))
 306 (define-key menu-bar-help-menu [report-emacs-bug]
 307   '("Send Bug Report..." . report-emacs-bug))
 308 (define-key menu-bar-help-menu [finder-by-keyword]
 309   '("Find Lisp Packages..." . finder-by-keyword))
 310 (define-key menu-bar-help-menu [emacs-tutorial]
 311   '("Emacs Tutorial" . help-with-tutorial))
 312 (define-key menu-bar-help-menu [man]
 313   '("Man..." . manual-entry))
 314 (define-key menu-bar-help-menu [describe-variable]
 315   '("Describe Variable..." . describe-variable))
 316 (define-key menu-bar-help-menu [describe-function]
 317   '("Describe Function..." . describe-function))
 318 (define-key menu-bar-help-menu [describe-key]
 319   '("Describe Key..." . describe-key))
 320 (define-key menu-bar-help-menu [list-keybindings]
 321   '("List Keybindings" . describe-bindings))
 322 (define-key menu-bar-help-menu [command-apropos]
 323   '("Command Apropos..." . command-apropos))
 324 (define-key menu-bar-help-menu [describe-mode]
 325   '("Describe Mode" . describe-mode))
 326 (define-key menu-bar-help-menu [info] '("Browse Manuals" . info))
 327 (define-key menu-bar-help-menu [emacs-faq] '("Emacs FAQ" . view-emacs-FAQ))
 328 (define-key menu-bar-help-menu [emacs-news] '("Emacs News" . view-emacs-news))
 329
 330 (defun kill-this-buffer ()      ; for the menubar
 331   "Kills the current buffer."
 332   (interactive)
 333   (kill-buffer (current-buffer)))
 334
 335 (defun kill-this-buffer-enabled-p ()
 336   (let ((count 0)
 337         (buffers (buffer-list)))
 338     (while buffers
 339       (or (string-match "^ " (buffer-name (car buffers)))
 340           (setq count (1+ count)))
 341       (setq buffers (cdr buffers)))
 342     (and (not (window-minibuffer-p (selected-window)))
 343          (> count 1))))
 344
 345 (put 'kill-this-buffer 'menu-enable '(kill-this-buffer-enabled-p))
 346
 347 (put 'save-buffer 'menu-enable
 348      '(and (buffer-modified-p)
 349            (not (window-minibuffer-p (selected-window)))))
 350
 351 (put 'write-file 'menu-enable
 352      '(not (window-minibuffer-p (selected-window))))
 353
 354 (put 'find-file 'menu-enable
 355      '(not (window-minibuffer-p (selected-window))))
 356
 357 (put 'dired 'menu-enable
 358      '(not (window-minibuffer-p (selected-window))))
 359
 360 (put 'insert-file 'menu-enable
 361      '(not (window-minibuffer-p (selected-window))))
 362
 363 (put 'revert-buffer 'menu-enable
 364      '(or revert-buffer-function revert-buffer-insert-file-contents-function
 365           (and (buffer-file-name)
 366                (or (buffer-modified-p)
 367                    (not (verify-visited-file-modtime (current-buffer)))))))
 368
 369 ;; Permit deleting frame if it would leave a visible or iconified frame.
 370 (put 'delete-frame 'menu-enable
 371      '(delete-frame-enabled-p))
 372
 373 (defun delete-frame-enabled-p ()
 374   "Return non-nil if `delete-frame' should be enabled in the menu bar."
 375   (let ((frames (frame-list))
 376               (count 0))
 377           (while frames
 378             (if (frame-visible-p (car frames))
 379                 (setq count (1+ count)))
 380             (setq frames (cdr frames)))
 381           (> count 1)))
 382
 383 (put 'advertised-undo 'menu-enable
 384      '(and (not (eq t buffer-undo-list))
 385            (if (eq last-command 'undo)
 386                (and (boundp 'pending-undo-list)
 387                     pending-undo-list)
 388              buffer-undo-list)))
 389
 390 (defvar yank-menu-length 20
 391   "*Maximum length to display in the yank-menu.")
 392
 393 (defun menu-bar-update-yank-menu (string old)
 394   (let ((front (car (cdr yank-menu)))
 395         (menu-string (if (<= (length string) yank-menu-length)
 396                          string
 397                        (concat
 398                         (substring string 0 (/ yank-menu-length 2))
 399                         "..."
 400                         (substring string (- (/ yank-menu-length 2)))))))
 401     ;; Don't let the menu string be all dashes
 402     ;; because that has a special meaning in a menu.
 403     (if (string-match "\\`-+\\'" menu-string)
 404         (setq menu-string (concat menu-string " ")))
 405     ;; If we're supposed to be extending an existing string, and that
 406     ;; string really is at the front of the menu, then update it in place.
 407     (if (and old (or (eq old (car front))
 408                      (string= old (car front))))
 409         (progn
 410           (setcar front string)
 411           (setcar (cdr front) menu-string))
 412       (setcdr yank-menu
 413               (cons
 414                (cons string (cons menu-string 'menu-bar-select-yank))
 415                (cdr yank-menu)))))
 416   (if (> (length (cdr yank-menu)) kill-ring-max)
 417       (setcdr (nthcdr kill-ring-max yank-menu) nil)))
 418
 419 (defun menu-bar-select-yank ()
 420   (interactive "*")
 421   (push-mark (point))
 422   (insert last-command-event))
 423 \f
 424 (define-key global-map [menu-bar buffer] '("Buffers" . menu-bar-buffers))
 425
 426 (defalias 'menu-bar-buffers (make-sparse-keymap "Buffers"))
 427
 428 (defvar buffers-menu-max-size 10
 429   "*Maximum number of entries which may appear on the Buffers menu.
 430 If this is 10, then only the ten most-recently-selected buffers are shown.
 431 If this is nil, then all buffers are shown.
 432 A large number or nil slows down menu responsiveness.")
 433
 434 (defvar list-buffers-directory nil)
 435
 436 (defvar menu-bar-update-buffers-maxbuf)
 437
 438 (defun menu-bar-select-buffer ()
 439   (interactive)
 440   (switch-to-buffer last-command-event))
 441
 442 (defun menu-bar-select-frame ()
 443   (interactive)
 444   (make-frame-visible last-command-event)
 445   (raise-frame last-command-event)
 446   (select-frame last-command-event))
 447
 448 (defun menu-bar-update-buffers-1 (elt)
 449   (cons (format
 450          (format "%%%ds  %%s%%s  %%s" menu-bar-update-buffers-maxbuf)
 451          (cdr elt)
 452          (if (buffer-modified-p (car elt))
 453              "*" " ")
 454          (save-excursion
 455            (set-buffer (car elt))
 456            (if buffer-read-only "%" " "))
 457          (let ((file
 458                 (or (buffer-file-name (car elt))
 459                     (save-excursion
 460                       (set-buffer (car elt))
 461                       list-buffers-directory)
 462                     "")))
 463            (setq file (or (file-name-directory file)
 464                           ""))
 465            (if (> (length file) 20)
 466                (setq file (concat "..." (substring file -17))))
 467            file))
 468         (car elt)))
 469
 470 (defvar menu-bar-buffers-menu-list-buffers-entry nil)
 471
 472 (defun menu-bar-update-buffers ()
 473   ;; If user discards the Buffers item, play along.
 474   (and (lookup-key (current-global-map) [menu-bar buffer])
 475        (frame-or-buffer-changed-p)
 476        (let ((buffers (buffer-list))
 477              (frames (frame-list))
 478              buffers-menu frames-menu)
 479          ;; If requested, list only the N most recently selected buffers.
 480          (if (and (integerp buffers-menu-max-size)
 481                   (> buffers-menu-max-size 1))
 482              (if (> (length buffers) buffers-menu-max-size)
 483                  (setcdr (nthcdr buffers-menu-max-size buffers) nil)))
 484
 485          ;; Make the menu of buffers proper.
 486          (setq buffers-menu
 487                (cons "Select Buffer"
 488                      (let* ((buffer-list
 489                              (mapcar 'list buffers))
 490                             tail
 491                             (menu-bar-update-buffers-maxbuf 0)
 492                             (maxlen 0)
 493                             alist
 494                             head)
 495                        ;; Put into each element of buffer-list
 496                        ;; the name for actual display,
 497                        ;; perhaps truncated in the middle.
 498                        (setq tail buffer-list)
 499                        (while tail
 500                          (let ((name (buffer-name (car (car tail)))))
 501                            (setcdr (car tail)
 502                                    (if (> (length name) 27)
 503                                        (concat (substring name 0 12)
 504                                                "..."
 505                                                (substring name -12))
 506                                      name)))
 507                          (setq tail (cdr tail)))
 508                        ;; Compute the maximum length of any name.
 509                        (setq tail buffer-list)
 510                        (while tail
 511                          (or (eq ?\ (aref (cdr (car tail)) 0))
 512                              (setq menu-bar-update-buffers-maxbuf
 513                                    (max menu-bar-update-buffers-maxbuf
 514                                         (length (cdr (car tail))))))
 515                          (setq tail (cdr tail)))
 516                        ;; Set ALIST to an alist of the form
 517                        ;; ITEM-STRING . BUFFER
 518                        (setq tail buffer-list)
 519                        (while tail
 520                          (let ((elt (car tail)))
 521                            (or (eq ?\ (aref (cdr elt) 0))
 522                                (setq alist (cons
 523                                             (menu-bar-update-buffers-1 elt)
 524                                             alist)))
 525                            (and alist (> (length (car (car alist))) maxlen)
 526                                 (setq maxlen (length (car (car alist))))))
 527                          (setq tail (cdr tail)))
 528                        (setq alist (nreverse alist))
 529                        ;; Make the menu item for list-buffers
 530                        ;; or reuse the one we already have.
 531                        ;; The advantage in reusing one
 532                        ;; is that it already has the keyboard equivalent
 533                        ;; cached, so we save the time to look that up again.
 534                        (or menu-bar-buffers-menu-list-buffers-entry
 535                            (setq menu-bar-buffers-menu-list-buffers-entry
 536                                  (cons
 537                                   'list-buffers
 538                                   (cons
 539                                    ""
 540                                    'list-buffers))))
 541                        ;; Update the item string for menu's new width.
 542                        (setcar (cdr menu-bar-buffers-menu-list-buffers-entry)
 543                                (concat (make-string (max (- (/ maxlen 2) 8) 0)
 544                                                     ?\ )
 545                                        "List All Buffers"))
 546                        ;; Now make the actual list of items,
 547                        ;; ending with the list-buffers item.
 548                        (nconc (mapcar '(lambda (pair)
 549                                          ;; This is somewhat risque, to use
 550                                          ;; the buffer name itself as the event
 551                                          ;; type to define, but it works.
 552                                          ;; It would not work to use the buffer
 553                                          ;; since a buffer as an event has its
 554                                          ;; own meaning.
 555                                          (nconc (list (buffer-name (cdr pair))
 556                                                       (car pair)
 557                                                       (cons nil nil))
 558                                                 'menu-bar-select-buffer))
 559                                       alist)
 560                               (list menu-bar-buffers-menu-list-buffers-entry)))))
 561
 562
 563          ;; Make a Frames menu if we have more than one frame.
 564          (if (cdr frames)
 565              (setq frames-menu
 566                    (cons "Select Frame"
 567                          (mapcar '(lambda (frame)
 568                                     (nconc (list frame
 569                                                  (cdr (assq 'name
 570                                                             (frame-parameters frame)))
 571                                                  (cons nil nil))
 572                                            'menu-bar-select-frame))
 573                                  frames))))
 574          (if buffers-menu
 575              (setq buffers-menu (cons 'keymap buffers-menu)))
 576          (if frames-menu
 577              (setq frames-menu (cons 'keymap frames-menu)))
 578          (define-key (current-global-map) [menu-bar buffer]
 579            (cons "Buffers"
 580                  (if (and buffers-menu frames-menu)
 581                      (list 'keymap "Buffers and Frames"
 582                            (cons 'buffers (cons "Buffers" buffers-menu))
 583                            (cons 'frames (cons "Frames" frames-menu)))
 584                    (or buffers-menu frames-menu 'undefined)))))))
 585
 586 (add-hook 'menu-bar-update-hook '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