lisp/menu-bar.el

   1 ;;; menu-bar.el --- define a default menu bar.
   2
   3 ;; Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
   4
   5 ;; Author: RMS
   6 ;; Keywords: internal
   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 the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;; Avishai Yacobi suggested some menu rearrangements.
  26
  27 ;;; Code:
  28
  29 ;;; User options:
  30
  31 (defvar buffers-menu-max-size 10
  32   "*Maximum number of entries which may appear on the Buffers menu.
  33 If this is 10, then only the ten most-recently-selected buffers are shown.
  34 If this is nil, then all buffers are shown.
  35 A large number or nil slows down menu responsiveness.")
  36
  37 ;; Don't clobber an existing menu-bar keymap, to preserve any menu-bar key
  38 ;; definitions made in loaddefs.el.
  39 (or (lookup-key global-map [menu-bar])
  40     (define-key global-map [menu-bar] (make-sparse-keymap "menu-bar")))
  41 (defvar menu-bar-help-menu (make-sparse-keymap "Help"))
  42
  43 ;; Force Help item to come last, after the major mode's own items.
  44 ;; The symbol used to be called `help', but that gets confused with the
  45 ;; help key.
  46 (setq menu-bar-final-items '(help-menu))
  47
  48 (define-key global-map [menu-bar help-menu] (cons "Help" menu-bar-help-menu))
  49 (defvar menu-bar-search-menu (make-sparse-keymap "Search"))
  50 (define-key global-map [menu-bar search] (cons "Search" menu-bar-search-menu))
  51 (defvar menu-bar-edit-menu (make-sparse-keymap "Edit"))
  52 (define-key global-map [menu-bar edit] (cons "Edit" menu-bar-edit-menu))
  53 (defvar menu-bar-tools-menu (make-sparse-keymap "Tools"))
  54 (define-key global-map [menu-bar tools] (cons "Tools" menu-bar-tools-menu))
  55 (defvar menu-bar-files-menu (make-sparse-keymap "Files"))
  56 (define-key global-map [menu-bar files] (cons "Files" menu-bar-files-menu))
  57
  58 ;; This alias is for compatibility with 19.28 and before.
  59 (defvar menu-bar-file-menu menu-bar-files-menu)
  60 \f
  61 (defvar vc-menu-map (make-sparse-keymap "Version Control"))
  62
  63 (define-key menu-bar-tools-menu [calendar] '("Display Calendar" . calendar))
  64 (define-key menu-bar-tools-menu [rmail] '("Read Mail" . rmail))
  65 (define-key menu-bar-tools-menu [gnus] '("Read Net News" . gnus))
  66
  67 (define-key menu-bar-tools-menu [separator-vc]
  68   '("--"))
  69
  70 (define-key menu-bar-tools-menu [vc]
  71   (cons "Version Control" vc-menu-map))
  72
  73 (define-key menu-bar-tools-menu [separator-compare]
  74   '("--"))
  75
  76 (define-key menu-bar-tools-menu [ediff-doc]
  77   '("Ediff Manual..." . ediff-documentation))
  78 (define-key menu-bar-tools-menu [eregistry]
  79   '("List Ediff Sessions..." . ediff-show-registry))
  80 (define-key menu-bar-tools-menu [epatch]
  81   '("Apply Patch" . menu-bar-epatch-menu))
  82 (define-key menu-bar-tools-menu [ediff-merge]
  83   '("Merge" . menu-bar-ediff-merge-menu))
  84 (define-key menu-bar-tools-menu [compare]
  85   '("Compare" . menu-bar-ediff-menu))
  86
  87 (define-key menu-bar-tools-menu [separator-print]
  88   '("--"))
  89
  90 (put 'print-region 'menu-enable 'mark-active)
  91 (put 'ps-print-region-with-faces 'menu-enable 'mark-active)
  92
  93 (define-key menu-bar-tools-menu [ps-print-region]
  94   '("Postscript Print Region" . ps-print-region-with-faces))
  95 (define-key menu-bar-tools-menu [ps-print-buffer]
  96   '("Postscript Print Buffer" . ps-print-buffer-with-faces))
  97 (define-key menu-bar-tools-menu [print-region]
  98   '("Print Region" . print-region))
  99 (define-key menu-bar-tools-menu [print-buffer]
 100   '("Print Buffer" . print-buffer))
 101 \f
 102 (define-key menu-bar-files-menu [exit-emacs]
 103   '("Exit Emacs" . save-buffers-kill-emacs))
 104
 105 (define-key menu-bar-files-menu [separator-exit]
 106   '("--"))
 107
 108 (define-key menu-bar-files-menu [one-window]
 109   '("One Window" . delete-other-windows))
 110
 111 (define-key menu-bar-files-menu [split-window]
 112   '("Split Window" . split-window-vertically))
 113
 114 (if (fboundp 'delete-frame)
 115     (progn
 116       ;; Don't use delete-frame as event name
 117       ;; because that is a special event.
 118       (define-key menu-bar-files-menu [delete-this-frame]
 119         '("Delete Frame" . delete-frame))
 120       (define-key menu-bar-files-menu [make-frame-on-display]
 121         '("Open New Display..." . make-frame-on-display))
 122       (define-key menu-bar-files-menu [make-frame]
 123         '("Make New Frame" . make-frame))))
 124
 125 (define-key menu-bar-files-menu [separator-buffers]
 126   '("--"))
 127
 128 (define-key menu-bar-files-menu [kill-buffer]
 129   '("Kill Current Buffer" . kill-this-buffer))
 130 (define-key menu-bar-files-menu [insert-file]
 131   '("Insert File..." . insert-file))
 132 (define-key menu-bar-files-menu [revert-buffer]
 133   '("Revert Buffer" . revert-buffer))
 134 (define-key menu-bar-files-menu [write-file]
 135   '("Save Buffer As..." . write-file))
 136 (define-key menu-bar-files-menu [save-buffer] '("Save Buffer" . save-buffer))
 137 (define-key menu-bar-files-menu [dired] '("Open Directory..." . dired))
 138 (define-key menu-bar-files-menu [open-file] '("Open File..." . find-file))
 139
 140 \f
 141 (defun nonincremental-search-forward (string)
 142   "Read a string and search for it nonincrementally."
 143   (interactive "sSearch for string: ")
 144   (if (equal string "")
 145       (search-forward (car search-ring))
 146     (isearch-update-ring string nil)
 147     (search-forward string)))
 148
 149 (defun nonincremental-search-backward (string)
 150   "Read a string and search backward for it nonincrementally."
 151   (interactive "sSearch for string: ")
 152   (if (equal string "")
 153       (search-backward (car search-ring))
 154     (isearch-update-ring string nil)
 155     (search-backward string)))
 156
 157 (defun nonincremental-re-search-forward (string)
 158   "Read a regular expression and search for it nonincrementally."
 159   (interactive "sSearch for regexp: ")
 160   (if (equal string "")
 161       (re-search-forward (car regexp-search-ring))
 162     (isearch-update-ring string t)
 163     (re-search-forward string)))
 164
 165 (defun nonincremental-re-search-backward (string)
 166   "Read a regular expression and search backward for it nonincrementally."
 167   (interactive "sSearch for regexp: ")
 168   (if (equal string "")
 169       (re-search-backward (car regexp-search-ring))
 170     (isearch-update-ring string t)
 171     (re-search-backward string)))
 172
 173 (defun nonincremental-repeat-search-forward ()
 174   "Search forward for the previous search string."
 175   (interactive)
 176   (search-forward (car search-ring)))
 177
 178 (defun nonincremental-repeat-search-backward ()
 179   "Search backward for the previous search string."
 180   (interactive)
 181   (search-backward (car search-ring)))
 182
 183 (defun nonincremental-repeat-re-search-forward ()
 184   "Search forward for the previous regular expression."
 185   (interactive)
 186   (re-search-forward (car regexp-search-ring)))
 187
 188 (defun nonincremental-repeat-re-search-backward ()
 189   "Search backward for the previous regular expression."
 190   (interactive)
 191   (re-search-backward (car regexp-search-ring)))
 192
 193 (define-key menu-bar-search-menu [query-replace-regexp]
 194   '("Query Replace Regexp..." . query-replace-regexp))
 195 (define-key menu-bar-search-menu [query-replace]
 196   '("Query Replace..." . query-replace))
 197 (define-key menu-bar-search-menu [find-tag]
 198   '("Find Tag..." . find-tag))
 199 (define-key menu-bar-search-menu [bookmark]
 200   '("Bookmarks" . menu-bar-bookmark-map))
 201
 202 (define-key menu-bar-search-menu [separator-search]
 203   '("--"))
 204
 205 (define-key menu-bar-search-menu [repeat-regexp-back]
 206   '("Repeat Regexp Backwards" . nonincremental-repeat-re-search-backward))
 207 (define-key menu-bar-search-menu [repeat-search-back]
 208   '("Repeat Backwards" . nonincremental-repeat-search-backward))
 209 (define-key menu-bar-search-menu [repeat-regexp-fwd]
 210   '("Repeat Regexp" . nonincremental-repeat-re-search-forward))
 211 (define-key menu-bar-search-menu [repeat-search-fwd]
 212   '("Repeat Search" . nonincremental-repeat-search-forward))
 213
 214 (define-key menu-bar-search-menu [separator-repeat]
 215   '("--"))
 216
 217 (define-key menu-bar-search-menu [re-search-backward]
 218   '("Regexp Search Backwards..." . nonincremental-re-search-backward))
 219 (define-key menu-bar-search-menu [search-backward]
 220   '("Search Backwards..." . nonincremental-search-backward))
 221 (define-key menu-bar-search-menu [re-search-forward]
 222   '("Regexp Search..." . nonincremental-re-search-forward))
 223 (define-key menu-bar-search-menu [search-forward]
 224   '("Search..." . nonincremental-search-forward))
 225 \f
 226 (if (fboundp 'start-process)
 227     (define-key menu-bar-edit-menu [spell] '("Spell" . ispell-menu-map)))
 228 (define-key menu-bar-edit-menu [fill] '("Fill" . fill-region))
 229 (define-key menu-bar-edit-menu [props] '("Text Properties" . facemenu-menu))
 230
 231 (define-key menu-bar-edit-menu [separator-edit]
 232   '("--"))
 233
 234 (define-key menu-bar-edit-menu [clear] '("Clear" . delete-region))
 235
 236 (define-key menu-bar-edit-menu [paste] '("Paste Most Recent" . yank))
 237
 238 (defvar yank-menu (cons "Select Yank" nil))
 239 (fset 'yank-menu (cons 'keymap yank-menu))
 240 (define-key menu-bar-edit-menu [select-paste] '("Select and Paste" . yank-menu))
 241 (define-key menu-bar-edit-menu [copy] '("Copy" . menu-bar-kill-ring-save))
 242 (define-key menu-bar-edit-menu [cut] '("Cut" . kill-region))
 243 (define-key menu-bar-edit-menu [undo] '("Undo" . undo))
 244
 245 (defun menu-bar-kill-ring-save (beg end)
 246   (interactive "r")
 247   (if (mouse-region-match)
 248       (message "Select a region with the mouse does `copy' automatically")
 249     (kill-ring-save beg end)))
 250
 251 (put 'fill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 252 (put 'kill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 253 (put 'menu-bar-kill-ring-save 'menu-enable 'mark-active)
 254 (put 'yank 'menu-enable '(and (x-selection-exists-p) (not buffer-read-only)))
 255 (put 'yank-menu 'menu-enable '(and (cdr yank-menu) (not buffer-read-only)))
 256 (put 'delete-region 'menu-enable '(and mark-active
 257                                        (not buffer-read-only)
 258                                        (not (mouse-region-match))))
 259 (put 'undo 'menu-enable '(and (not buffer-read-only)
 260                               (if (eq last-command 'undo)
 261                                   pending-undo-list
 262                                 (consp buffer-undo-list))))
 263 (put 'query-replace 'menu-enable '(not buffer-read-only))
 264 (put 'query-replace-regexp 'menu-enable '(not buffer-read-only))
 265
 266 (autoload 'ispell-menu-map "ispell" nil t 'keymap)
 267
 268 ;; These are alternative definitions for the cut, paste and copy
 269 ;; menu items.  Use them if your system expects these to use the clipboard.
 270
 271 (put 'clipboard-kill-region 'menu-enable 'mark-active)
 272 (put 'clipboard-kill-ring-save 'menu-enable 'mark-active)
 273 (put 'clipboard-yank 'menu-enable
 274      '(or (x-selection-exists-p) (x-selection-exists-p 'CLIPBOARD)))
 275
 276 (defun clipboard-yank ()
 277   "Reinsert the last stretch of killed text, or the clipboard contents."
 278   (interactive)
 279   (let ((x-select-enable-clipboard t))
 280     (yank)))
 281
 282 (defun clipboard-kill-ring-save (beg end)
 283   "Copy region to kill ring, and save in the X clipboard."
 284   (interactive "r")
 285   (let ((x-select-enable-clipboard t))
 286     (kill-ring-save beg end)))
 287
 288 (defun clipboard-kill-region (beg end)
 289   "Kill the region, and save it in the X clipboard."
 290   (interactive "r")
 291   (let ((x-select-enable-clipboard t))
 292     (kill-region beg end)))
 293
 294 (defun menu-bar-enable-clipboard ()
 295   "Make CUT, PASTE and COPY (keys and menu bar items) use the clipboard.
 296 Do the same for the keys of the same name."
 297   (interactive)
 298   ;; We can't use constant list structure here because it becomes pure,
 299   ;; and because it gets modified with cache data.
 300   (define-key menu-bar-edit-menu [paste]
 301     (cons "Paste" 'clipboard-yank))
 302   (define-key menu-bar-edit-menu [copy]
 303     (cons "Copy" 'clipboard-kill-ring-save))
 304   (define-key menu-bar-edit-menu [cut]
 305     (cons "Cut" 'clipboard-kill-region))
 306
 307   (define-key global-map [f20] 'clipboard-kill-region)
 308   (define-key global-map [f16] 'clipboard-kill-ring-save)
 309   (define-key global-map [f18] 'clipboard-yank)
 310   ;; X11R6 versions
 311   (define-key global-map [cut] 'clipboard-kill-region)
 312   (define-key global-map [copy] 'clipboard-kill-ring-save)
 313   (define-key global-map [paste] 'clipboard-yank))
 314 \f
 315 (define-key menu-bar-help-menu [emacs-version]
 316   '("Show Version" . emacs-version))
 317 (define-key menu-bar-help-menu [report-emacs-bug]
 318   '("Send Bug Report..." . report-emacs-bug))
 319 (define-key menu-bar-help-menu [finder-by-keyword]
 320   '("Find Lisp Packages..." . finder-by-keyword))
 321 (define-key menu-bar-help-menu [emacs-tutorial]
 322   '("Emacs Tutorial" . help-with-tutorial))
 323 (define-key menu-bar-help-menu [man]
 324   '("Man..." . manual-entry))
 325 (define-key menu-bar-help-menu [describe-variable]
 326   '("Describe Variable..." . describe-variable))
 327 (define-key menu-bar-help-menu [describe-function]
 328   '("Describe Function..." . describe-function))
 329 (define-key menu-bar-help-menu [describe-key]
 330   '("Describe Key..." . describe-key))
 331 (define-key menu-bar-help-menu [list-keybindings]
 332   '("List Keybindings" . describe-bindings))
 333 (define-key menu-bar-help-menu [command-apropos]
 334   '("Command Apropos..." . command-apropos))
 335 (define-key menu-bar-help-menu [describe-mode]
 336   '("Describe Mode" . describe-mode))
 337 (define-key menu-bar-help-menu [info] '("Browse Manuals" . info))
 338 (define-key menu-bar-help-menu [emacs-faq] '("Emacs FAQ" . view-emacs-FAQ))
 339 (define-key menu-bar-help-menu [emacs-news] '("Emacs News" . view-emacs-news))
 340
 341 (defun kill-this-buffer ()      ; for the menubar
 342   "Kills the current buffer."
 343   (interactive)
 344   (kill-buffer (current-buffer)))
 345
 346 (defun kill-this-buffer-enabled-p ()
 347   (let ((count 0)
 348         (buffers (buffer-list)))
 349     (while buffers
 350       (or (string-match "^ " (buffer-name (car buffers)))
 351           (setq count (1+ count)))
 352       (setq buffers (cdr buffers)))
 353     (and (not (window-minibuffer-p (selected-window)))
 354          (> count 1))))
 355
 356 (put 'kill-this-buffer 'menu-enable '(kill-this-buffer-enabled-p))
 357
 358 (put 'save-buffer 'menu-enable
 359      '(and (buffer-modified-p)
 360            (not (window-minibuffer-p (selected-window)))))
 361
 362 (put 'write-file 'menu-enable
 363      '(not (window-minibuffer-p (selected-window))))
 364
 365 (put 'find-file 'menu-enable
 366      '(not (window-minibuffer-p (selected-window))))
 367
 368 (put 'dired 'menu-enable
 369      '(not (window-minibuffer-p (selected-window))))
 370
 371 (put 'insert-file 'menu-enable
 372      '(not (window-minibuffer-p (selected-window))))
 373
 374 (put 'revert-buffer 'menu-enable
 375      '(or revert-buffer-function revert-buffer-insert-file-contents-function
 376           (and (buffer-file-name)
 377                (or (buffer-modified-p)
 378                    (not (verify-visited-file-modtime (current-buffer)))))))
 379
 380 ;; Permit deleting frame if it would leave a visible or iconified frame.
 381 (put 'delete-frame 'menu-enable
 382      '(delete-frame-enabled-p))
 383
 384 (defun delete-frame-enabled-p ()
 385   "Return non-nil if `delete-frame' should be enabled in the menu bar."
 386   (let ((frames (frame-list))
 387               (count 0))
 388           (while frames
 389             (if (frame-visible-p (car frames))
 390                 (setq count (1+ count)))
 391             (setq frames (cdr frames)))
 392           (> count 1)))
 393
 394 (put 'advertised-undo 'menu-enable
 395      '(and (not (eq t buffer-undo-list))
 396            (if (eq last-command 'undo)
 397                (and (boundp 'pending-undo-list)
 398                     pending-undo-list)
 399              buffer-undo-list)))
 400
 401 (defvar yank-menu-length 20
 402   "*Maximum length to display in the yank-menu.")
 403
 404 (defun menu-bar-update-yank-menu (string old)
 405   (let ((front (car (cdr yank-menu)))
 406         (menu-string (if (<= (length string) yank-menu-length)
 407                          string
 408                        (concat
 409                         (substring string 0 (/ yank-menu-length 2))
 410                         "..."
 411                         (substring string (- (/ yank-menu-length 2)))))))
 412     ;; Don't let the menu string be all dashes
 413     ;; because that has a special meaning in a menu.
 414     (if (string-match "\\`-+\\'" menu-string)
 415         (setq menu-string (concat menu-string " ")))
 416     ;; If we're supposed to be extending an existing string, and that
 417     ;; string really is at the front of the menu, then update it in place.
 418     (if (and old (or (eq old (car front))
 419                      (string= old (car front))))
 420         (progn
 421           (setcar front string)
 422           (setcar (cdr front) menu-string))
 423       (setcdr yank-menu
 424               (cons
 425                (cons string (cons menu-string 'menu-bar-select-yank))
 426                (cdr yank-menu)))))
 427   (if (> (length (cdr yank-menu)) kill-ring-max)
 428       (setcdr (nthcdr kill-ring-max yank-menu) nil)))
 429
 430 (defun menu-bar-select-yank ()
 431   (interactive "*")
 432   (push-mark (point))
 433   (insert last-command-event))
 434 \f
 435 ;; This definition is just to show what this looks like.
 436 ;; It gets overridden below when menu-bar-update-buffers is called.
 437 (define-key global-map [menu-bar buffer]
 438   (cons "Buffers" (make-sparse-keymap "Buffers")))
 439
 440 (defvar list-buffers-directory nil)
 441
 442 (defvar menu-bar-update-buffers-maxbuf)
 443
 444 (defun menu-bar-select-buffer ()
 445   (interactive)
 446   (switch-to-buffer last-command-event))
 447
 448 (defun menu-bar-select-frame ()
 449   (interactive)
 450   (make-frame-visible last-command-event)
 451   (raise-frame last-command-event)
 452   (select-frame last-command-event))
 453
 454 (defun menu-bar-update-buffers-1 (elt)
 455   (cons (format
 456          (format "%%%ds  %%s%%s  %%s" menu-bar-update-buffers-maxbuf)
 457          (cdr elt)
 458          (if (buffer-modified-p (car elt))
 459              "*" " ")
 460          (save-excursion
 461            (set-buffer (car elt))
 462            (if buffer-read-only "%" " "))
 463          (let ((file
 464                 (or (buffer-file-name (car elt))
 465                     (save-excursion
 466                       (set-buffer (car elt))
 467                       list-buffers-directory)
 468                     "")))
 469            (setq file (or (file-name-directory file)
 470                           ""))
 471            (if (> (length file) 20)
 472                (setq file (concat "..." (substring file -17))))
 473            file))
 474         (car elt)))
 475
 476 (defvar menu-bar-buffers-menu-list-buffers-entry nil)
 477
 478 (defun menu-bar-update-buffers ()
 479   ;; If user discards the Buffers item, play along.
 480   (and (lookup-key (current-global-map) [menu-bar buffer])
 481        (frame-or-buffer-changed-p)
 482        (let ((buffers (buffer-list))
 483              (frames (frame-list))
 484              buffers-menu frames-menu)
 485          ;; If requested, list only the N most recently selected buffers.
 486          (if (and (integerp buffers-menu-max-size)
 487                   (> buffers-menu-max-size 1))
 488              (if (> (length buffers) buffers-menu-max-size)
 489                  (setcdr (nthcdr buffers-menu-max-size buffers) nil)))
 490
 491          ;; Make the menu of buffers proper.
 492          (setq buffers-menu
 493                (cons "Select Buffer"
 494                      (let* ((buffer-list
 495                              (mapcar 'list buffers))
 496                             tail
 497                             (menu-bar-update-buffers-maxbuf 0)
 498                             (maxlen 0)
 499                             alist
 500                             head)
 501                        ;; Put into each element of buffer-list
 502                        ;; the name for actual display,
 503                        ;; perhaps truncated in the middle.
 504                        (setq tail buffer-list)
 505                        (while tail
 506                          (let ((name (buffer-name (car (car tail)))))
 507                            (setcdr (car tail)
 508                                    (if (> (length name) 27)
 509                                        (concat (substring name 0 12)
 510                                                "..."
 511                                                (substring name -12))
 512                                      name)))
 513                          (setq tail (cdr tail)))
 514                        ;; Compute the maximum length of any name.
 515                        (setq tail buffer-list)
 516                        (while tail
 517                          (or (eq ?\ (aref (cdr (car tail)) 0))
 518                              (setq menu-bar-update-buffers-maxbuf
 519                                    (max menu-bar-update-buffers-maxbuf
 520                                         (length (cdr (car tail))))))
 521                          (setq tail (cdr tail)))
 522                        ;; Set ALIST to an alist of the form
 523                        ;; ITEM-STRING . BUFFER
 524                        (setq tail buffer-list)
 525                        (while tail
 526                          (let ((elt (car tail)))
 527                            (or (eq ?\ (aref (cdr elt) 0))
 528                                (setq alist (cons
 529                                             (menu-bar-update-buffers-1 elt)
 530                                             alist)))
 531                            (and alist (> (length (car (car alist))) maxlen)
 532                                 (setq maxlen (length (car (car alist))))))
 533                          (setq tail (cdr tail)))
 534                        (setq alist (nreverse alist))
 535                        ;; Make the menu item for list-buffers
 536                        ;; or reuse the one we already have.
 537                        ;; The advantage in reusing one
 538                        ;; is that it already has the keyboard equivalent
 539                        ;; cached, so we save the time to look that up again.
 540                        (or menu-bar-buffers-menu-list-buffers-entry
 541                            (setq menu-bar-buffers-menu-list-buffers-entry
 542                                  (cons
 543                                   'list-buffers
 544                                   (cons
 545                                    ""
 546                                    'list-buffers))))
 547                        ;; Update the item string for menu's new width.
 548                        (setcar (cdr menu-bar-buffers-menu-list-buffers-entry)
 549                                (concat (make-string (max (- (/ maxlen 2) 8) 0)
 550                                                     ?\ )
 551                                        "List All Buffers"))
 552                        ;; Now make the actual list of items,
 553                        ;; ending with the list-buffers item.
 554                        (nconc (mapcar '(lambda (pair)
 555                                          ;; This is somewhat risque, to use
 556                                          ;; the buffer name itself as the event
 557                                          ;; type to define, but it works.
 558                                          ;; It would not work to use the buffer
 559                                          ;; since a buffer as an event has its
 560                                          ;; own meaning.
 561                                          (nconc (list (buffer-name (cdr pair))
 562                                                       (car pair)
 563                                                       (cons nil nil))
 564                                                 'menu-bar-select-buffer))
 565                                       alist)
 566                               (list menu-bar-buffers-menu-list-buffers-entry)))))
 567
 568
 569          ;; Make a Frames menu if we have more than one frame.
 570          (if (cdr frames)
 571              (setq frames-menu
 572                    (cons "Select Frame"
 573                          (mapcar '(lambda (frame)
 574                                     (nconc (list frame
 575                                                  (cdr (assq 'name
 576                                                             (frame-parameters frame)))
 577                                                  (cons nil nil))
 578                                            'menu-bar-select-frame))
 579                                  frames))))
 580          (if buffers-menu
 581              (setq buffers-menu (cons 'keymap buffers-menu)))
 582          (if frames-menu
 583              (setq frames-menu (cons 'keymap frames-menu)))
 584          (define-key (current-global-map) [menu-bar buffer]
 585            (cons "Buffers"
 586                  (if (and buffers-menu frames-menu)
 587                      (list 'keymap "Buffers and Frames"
 588                            (cons 'buffers (cons "Buffers" buffers-menu))
 589                            (cons 'frames (cons "Frames" frames-menu)))
 590                    (or buffers-menu frames-menu 'undefined)))))))
 591
 592 (add-hook 'menu-bar-update-hook 'menu-bar-update-buffers)
 593
 594 (menu-bar-update-buffers)
 595
 596 ;; this version is too slow
 597 ;;;(defun format-buffers-menu-line (buffer)
 598 ;;;  "Returns a string to represent the given buffer in the Buffer menu.
 599 ;;;nil means the buffer shouldn't be listed.  You can redefine this."
 600 ;;;  (if (string-match "\\` " (buffer-name buffer))
 601 ;;;      nil
 602 ;;;    (save-excursion
 603 ;;;     (set-buffer buffer)
 604 ;;;     (let ((size (buffer-size)))
 605 ;;;       (format "%s%s %-19s %6s %-15s %s"
 606 ;;;            (if (buffer-modified-p) "*" " ")
 607 ;;;            (if buffer-read-only "%" " ")
 608 ;;;            (buffer-name)
 609 ;;;            size
 610 ;;;            mode-name
 611 ;;;            (or (buffer-file-name) ""))))))
 612 \f
 613 ;;; Set up a menu bar menu for the minibuffer.
 614
 615 (mapcar
 616  (function
 617   (lambda (map)
 618     (define-key map [menu-bar minibuf]
 619       (cons "Minibuf" (make-sparse-keymap "Minibuf")))))
 620  (list minibuffer-local-ns-map
 621        minibuffer-local-must-match-map
 622        minibuffer-local-isearch-map
 623        minibuffer-local-map
 624        minibuffer-local-completion-map))
 625
 626 (mapcar
 627  (function
 628   (lambda (map)
 629     (define-key map [menu-bar minibuf ?\?]
 630       '("List Completions" . minibuffer-completion-help))
 631     (define-key map [menu-bar minibuf space]
 632       '("Complete Word" . minibuffer-complete-word))
 633     (define-key map [menu-bar minibuf tab]
 634       '("Complete" . minibuffer-complete))
 635     ))
 636  (list minibuffer-local-must-match-map
 637        minibuffer-local-completion-map))
 638
 639 (mapcar
 640  (function
 641   (lambda (map)
 642     (define-key map [menu-bar minibuf quit]
 643       '("Quit" . keyboard-escape-quit))
 644     (define-key map [menu-bar minibuf return]
 645       '("Enter" . exit-minibuffer))
 646     ))
 647  (list minibuffer-local-ns-map
 648        minibuffer-local-must-match-map
 649        minibuffer-local-isearch-map
 650        minibuffer-local-map
 651        minibuffer-local-completion-map))
 652 \f
 653 (defvar menu-bar-mode nil)
 654
 655 (defun menu-bar-mode (flag)
 656   "Toggle display of a menu bar on each frame.
 657 This command applies to all frames that exist and frames to be
 658 created in the future.
 659 With a numeric argument, if the argument is negative,
 660 turn off menu bars; otherwise, turn on menu bars."
 661  (interactive "P")
 662
 663   ;; Make menu-bar-mode and default-frame-alist consistent.
 664   (let ((default (assq 'menu-bar-lines default-frame-alist)))
 665     (if default
 666         (setq menu-bar-mode (not (eq (cdr default) 0)))
 667       (setq default-frame-alist
 668             (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 669                   default-frame-alist))))
 670
 671   ;; Toggle or set the mode, according to FLAG.
 672  (setq menu-bar-mode (if (null flag) (not menu-bar-mode)
 673                        (> (prefix-numeric-value flag) 0)))
 674
 675  ;; Apply it to default-frame-alist.
 676  (let ((parameter (assq 'menu-bar-lines default-frame-alist)))
 677    (if (consp parameter)
 678        (setcdr parameter (if menu-bar-mode 1 0))
 679      (setq default-frame-alist
 680            (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 681                  default-frame-alist))))
 682
 683  ;; Apply it to existing frames.
 684  (let ((frames (frame-list)))
 685    (while frames
 686      (let ((height (cdr (assq 'height (frame-parameters (car frames))))))
 687        (modify-frame-parameters (car frames)
 688                                 (list (cons 'menu-bar-lines
 689                                           (if menu-bar-mode 1 0))))
 690        (modify-frame-parameters (car frames)
 691                                 (list (cons 'height height))))
 692      (setq frames (cdr frames)))))
 693
 694 (provide 'menu-bar)
 695
 696 ;;; menu-bar.el ends here