lisp/menu-bar.el

   1 ;;; menu-bar.el --- define a default menu bar.
   2
   3 ;; Copyright (C) 1993, 1994, 1995, 2000 Free Software Foundation, Inc.
   4
   5 ;; Author: RMS
   6 ;; Maintainer: FSF
   7 ;; Keywords: internal, mouse
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 2, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24 ;; Boston, MA 02111-1307, USA.
  25
  26 ;; Avishai Yacobi suggested some menu rearrangements.
  27
  28 ;;; Code:
  29
  30 ;;; User options:
  31
  32 (defcustom buffers-menu-max-size 10
  33   "*Maximum number of entries which may appear on the Buffers menu.
  34 If this is 10, then only the ten most-recently-selected buffers are shown.
  35 If this is nil, then all buffers are shown.
  36 A large number or nil slows down menu responsiveness."
  37   :type '(choice integer
  38                  (const :tag "All" nil))
  39   :group 'mouse)
  40
  41 ;; Don't clobber an existing menu-bar keymap, to preserve any menu-bar key
  42 ;; definitions made in loaddefs.el.
  43 (or (lookup-key global-map [menu-bar])
  44     (define-key global-map [menu-bar] (make-sparse-keymap "menu-bar")))
  45 (defvar menu-bar-help-menu (make-sparse-keymap "Help"))
  46
  47 ;; Force Help item to come last, after the major mode's own items.
  48 ;; The symbol used to be called `help', but that gets confused with the
  49 ;; help key.
  50 (setq menu-bar-final-items '(help-menu))
  51
  52 (define-key global-map [menu-bar help-menu] (cons "Help" menu-bar-help-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 ;; This definition is just to show what this looks like.
  56 ;; It gets overridden below when menu-bar-update-buffers is called.
  57 (define-key global-map [menu-bar buffer]
  58   (cons "Buffers" (make-sparse-keymap "Buffers")))
  59 (defvar menu-bar-options-menu (make-sparse-keymap "Options"))
  60 (define-key global-map [menu-bar options]
  61   (cons "Options" menu-bar-options-menu))
  62 (defvar menu-bar-edit-menu (make-sparse-keymap "Edit"))
  63 (define-key global-map [menu-bar edit] (cons "Edit" menu-bar-edit-menu))
  64 (defvar menu-bar-files-menu (make-sparse-keymap "File"))
  65 (define-key global-map [menu-bar files] (cons "File" menu-bar-files-menu))
  66
  67 ;; This alias is for compatibility with 19.28 and before.
  68 (defvar menu-bar-file-menu menu-bar-files-menu)
  69 \f
  70 ;; The "File" menu items
  71 (define-key menu-bar-files-menu [exit-emacs]
  72   '(menu-item "Exit Emacs" save-buffers-kill-emacs
  73               :help "Save unsaved buffers, then exit"))
  74
  75 (define-key menu-bar-files-menu [separator-exit]
  76   '("--"))
  77
  78 ;; Don't use delete-frame as event name because that is a special
  79 ;; event.
  80 (define-key menu-bar-files-menu [delete-this-frame]
  81   '(menu-item "Delete Frame" delete-frame
  82               :visible (fboundp 'delete-frame)
  83               :enable (delete-frame-enabled-p)
  84               :help "Delete currently selected frame"))
  85 (define-key menu-bar-files-menu [make-frame-on-display]
  86   '(menu-item "New Frame on Display..." make-frame-on-display
  87               :visible (fboundp 'make-frame-on-display)
  88               :help "Open a new frame on another display"))
  89 (define-key menu-bar-files-menu [make-frame]
  90   '(menu-item "New Frame" make-frame-command
  91               :visible (fboundp 'make-frame-command)
  92               :help "Open a new frame"))
  93
  94 (define-key menu-bar-files-menu [one-window]
  95   '(menu-item "Unsplit Windows" delete-other-windows
  96               :enable (not (one-window-p t nil))
  97               :help "Make selected window fill its frame"))
  98
  99 (define-key menu-bar-files-menu [split-window]
 100   '(menu-item "Split Window" split-window-vertically
 101               :help "Split selected window in two"))
 102
 103 (define-key menu-bar-files-menu [separator-window]
 104   '(menu-item "--"))
 105
 106 (define-key menu-bar-files-menu [ps-print-region]
 107   '(menu-item "Postscript Print Region" ps-print-region-with-faces
 108               :enable mark-active
 109               :help "Pretty-print marked region to PostScript printer"))
 110 (define-key menu-bar-files-menu [ps-print-buffer]
 111   '(menu-item "Postscript Print Buffer" ps-print-buffer-with-faces
 112               :help "Pretty-print current buffer to PostScript printer"))
 113 (define-key menu-bar-files-menu [print-region]
 114   '(menu-item "Print Region" print-region
 115               :enable mark-active
 116               :help "Print region between mark and current position"))
 117 (define-key menu-bar-files-menu [print-buffer]
 118   '(menu-item "Print Buffer" print-buffer
 119               :help "Print current buffer with page headings"))
 120
 121 (define-key menu-bar-files-menu [separator-print]
 122   '(menu-item "--"))
 123
 124 (define-key menu-bar-files-menu [recover-session]
 125   '(menu-item "Recover Crashed Session..." recover-session
 126               :enable (and auto-save-list-file-prefix
 127                            (file-directory-p
 128                             (file-name-directory auto-save-list-file-prefix))
 129                            (directory-files
 130                             (file-name-directory auto-save-list-file-prefix)
 131                             nil
 132                             (concat "\\`"
 133                                     (regexp-quote
 134                                      (file-name-nondirectory
 135                                       auto-save-list-file-prefix)))
 136                             t))
 137               :help "Recover edits from a crashed session"))
 138 (define-key menu-bar-files-menu [revert-buffer]
 139   '(menu-item "Revert Buffer" revert-buffer
 140               :enable (or revert-buffer-function
 141                           revert-buffer-insert-file-contents-function
 142                           (and (buffer-file-name)
 143                                (or (buffer-modified-p)
 144                                    (not (verify-visited-file-modtime
 145                                          (current-buffer))))))
 146               :help "Re-read current buffer from its file"))
 147 (define-key menu-bar-files-menu [write-file]
 148   '(menu-item "Save Buffer As..." write-file
 149               :enable (not (window-minibuffer-p
 150                             (frame-selected-window menu-updating-frame)))
 151               :help "Write current buffer to another file"))
 152 (define-key menu-bar-files-menu [save-buffer]
 153   '(menu-item "Save (current buffer)" save-buffer
 154               :enable (and (buffer-modified-p)
 155                            (buffer-file-name)
 156                            (not (window-minibuffer-p
 157                                  (frame-selected-window menu-updating-frame))))
 158               :help "Save current buffer to its file"))
 159
 160 (define-key menu-bar-files-menu [separator-save]
 161   '(menu-item "--"))
 162
 163 (define-key menu-bar-files-menu [kill-buffer]
 164   '(menu-item "Close (current buffer)" kill-this-buffer
 165               :enable (kill-this-buffer-enabled-p)
 166               :help "Discard current buffer"))
 167 (define-key menu-bar-files-menu [insert-file]
 168   '(menu-item "Insert File..." insert-file
 169               :enable (not (window-minibuffer-p
 170                             (frame-selected-window menu-updating-frame)))
 171               :help "Insert another file into current buffer"))
 172 (define-key menu-bar-files-menu [dired]
 173   '(menu-item "Open Directory..." dired
 174               :help "Read a directory, operate on its files"))
 175 (define-key menu-bar-files-menu [open-file]
 176   '(menu-item "Open File..." find-file
 177               :enable (not (window-minibuffer-p
 178                             (frame-selected-window menu-updating-frame)))
 179               :help "Read a file into an Emacs buffer"))
 180
 181 \f
 182 ;; The "Edit" menu items
 183 (defun nonincremental-search-forward (string)
 184   "Read a string and search for it nonincrementally."
 185   (interactive "sSearch for string: ")
 186   (if (equal string "")
 187       (search-forward (car search-ring))
 188     (isearch-update-ring string nil)
 189     (search-forward string)))
 190
 191 (defun nonincremental-search-backward (string)
 192   "Read a string and search backward for it nonincrementally."
 193   (interactive "sSearch for string: ")
 194   (if (equal string "")
 195       (search-backward (car search-ring))
 196     (isearch-update-ring string nil)
 197     (search-backward string)))
 198
 199 (defun nonincremental-re-search-forward (string)
 200   "Read a regular expression and search for it nonincrementally."
 201   (interactive "sSearch for regexp: ")
 202   (if (equal string "")
 203       (re-search-forward (car regexp-search-ring))
 204     (isearch-update-ring string t)
 205     (re-search-forward string)))
 206
 207 (defun nonincremental-re-search-backward (string)
 208   "Read a regular expression and search backward for it nonincrementally."
 209   (interactive "sSearch for regexp: ")
 210   (if (equal string "")
 211       (re-search-backward (car regexp-search-ring))
 212     (isearch-update-ring string t)
 213     (re-search-backward string)))
 214
 215 (defun nonincremental-repeat-search-forward ()
 216   "Search forward for the previous search string."
 217   (interactive)
 218   (if (null search-ring)
 219       (error "No previous search"))
 220   (search-forward (car search-ring)))
 221
 222 (defun nonincremental-repeat-search-backward ()
 223   "Search backward for the previous search string."
 224   (interactive)
 225   (if (null search-ring)
 226       (error "No previous search"))
 227   (search-backward (car search-ring)))
 228
 229 (defun nonincremental-repeat-re-search-forward ()
 230   "Search forward for the previous regular expression."
 231   (interactive)
 232   (if (null regexp-search-ring)
 233       (error "No previous search"))
 234   (re-search-forward (car regexp-search-ring)))
 235
 236 (defun nonincremental-repeat-re-search-backward ()
 237   "Search backward for the previous regular expression."
 238   (interactive)
 239   (if (null regexp-search-ring)
 240       (error "No previous search"))
 241   (re-search-backward (car regexp-search-ring)))
 242
 243 (defvar menu-bar-search-menu (make-sparse-keymap "Search"))
 244 (defvar menu-bar-adv-search-menu
 245   (make-sparse-keymap "Advanced Search/Replace"))
 246
 247 (define-key menu-bar-adv-search-menu [tags-continue]
 248   '(menu-item "Continue Tags Search/Replace" tags-loop-continue
 249               :help "Continue last tags search/replace operation"))
 250 (define-key menu-bar-adv-search-menu [tags-repl]
 251   '(menu-item "Replace in all tagged files" tags-query-replace
 252               :help "Interactively replace a regexp in all tagged files"))
 253 (define-key menu-bar-adv-search-menu [tags-srch]
 254   '(menu-item "Search in all tagged files" tags-search
 255               :help "Search for a regexp in all tagged files"))
 256
 257 (define-key menu-bar-adv-search-menu [separator-tag-search]
 258   '(menu-item "--"))
 259
 260 (define-key menu-bar-adv-search-menu [query-replace-regexp]
 261   '(menu-item "Replace Regexp..." query-replace-regexp
 262               :enable (not buffer-read-only)
 263               :help "Replace regular expression, ask about each occurrence"))
 264 (define-key menu-bar-adv-search-menu [repeat-regexp-back]
 265   '(menu-item "Repeat Regexp Backwards"
 266               nonincremental-repeat-re-search-backward
 267               :enable regexp-search-ring
 268               :help "Repeat last regular expression search backwards"))
 269 (define-key menu-bar-adv-search-menu [repeat-regexp-fwd]
 270   '(menu-item "Repeat Regexp" nonincremental-repeat-re-search-forward
 271               :enable regexp-search-ring
 272               :help "Repeat last regular expression search forward"))
 273 (define-key menu-bar-adv-search-menu [re-search-backward]
 274   '(menu-item "Search Regexp Backwards..." nonincremental-re-search-backward
 275               :help "Search backwards for a regular expression"))
 276 (define-key menu-bar-adv-search-menu [re-search-forward]
 277   '(menu-item "Search Regexp..." nonincremental-re-search-forward
 278               :help "Search forward for a regular expression"))
 279 (define-key menu-bar-search-menu [re-search]
 280   (list 'menu-item "Advanced Search/Replace" menu-bar-adv-search-menu
 281               :help "Regexp and Tags search and replace"))
 282
 283 (define-key menu-bar-search-menu [query-replace]
 284   '(menu-item "Replace..." query-replace
 285               :enable (not buffer-read-only)
 286               :help "Replace string interactively, ask about each occurrence"))
 287 (define-key menu-bar-search-menu [repeat-search-back]
 288   '(menu-item "Repeat Backwards" nonincremental-repeat-search-backward
 289               :enable search-ring
 290               :help "Repeat last search backwards"))
 291 (define-key menu-bar-search-menu [repeat-search-fwd]
 292   '(menu-item "Repeat Search" nonincremental-repeat-search-forward
 293               :enable search-ring
 294               :help "Repeat last search forward"))
 295 (define-key menu-bar-search-menu [search-backward]
 296   '(menu-item "Search Backwards..." nonincremental-search-backward
 297               :help "Search backwards for a string"))
 298 (define-key menu-bar-search-menu [search-forward]
 299   '(menu-item "Search..." nonincremental-search-forward
 300               :help "Search forward for a string"))
 301
 302 ;;; Assemble the top-level Edit menu items.
 303 (define-key menu-bar-edit-menu [props]
 304   '(menu-item "Text Properties" facemenu-menu
 305               :help "Change properties of text in region"))
 306
 307 (define-key menu-bar-search-menu [separator-search]
 308   '(menu-item "--"))
 309
 310 (define-key menu-bar-edit-menu [bookmark]
 311   '(menu-item "Bookmarks" menu-bar-bookmark-map
 312               :help "Record positions and jump between them"))
 313
 314 (define-key menu-bar-edit-menu [separator-bookmark]
 315   '(menu-item "--"))
 316
 317 (defvar menu-bar-goto-menu (make-sparse-keymap "Go To"))
 318
 319 (define-key menu-bar-goto-menu [set-tags-name]
 320   '(menu-item "Set Tags File Name" visit-tags-table
 321               :help "Tell Tags commands which tag table file to use"))
 322
 323 (define-key menu-bar-goto-menu [separator-tag-file]
 324   '(menu-item "--"))
 325
 326 (define-key menu-bar-goto-menu [apropos-tags]
 327   '(menu-item "Tags Apropos" tags-apropos
 328               :help "Find function/variables whose names match regexp"))
 329 (define-key menu-bar-goto-menu [next-tag-otherw]
 330   '(menu-item "Next Tag in Other Window"
 331               (function (lambda () (find-tag-other-window nil t)))
 332               :enable (and (boundp 'tags-location-ring)
 333                            (not (ring-empty-p tags-location-ring)))
 334               :help "Find next function/variable matching last tag name in another window"))
 335 (define-key menu-bar-goto-menu [next-tag]
 336   '(menu-item "Find Next Tag"
 337               (function (lambda () (find-tag nil t)))
 338               :enable (and (boundp 'tags-location-ring)
 339                            (not (ring-empty-p tags-location-ring)))
 340               :help "Find next function/variable matching last tag name"))
 341 (define-key menu-bar-goto-menu [find-tag-otherw]
 342   '(menu-item "Find Tag in Other Window..." find-tag-other-window
 343               :help "Find function/variable definition in another window"))
 344 (define-key menu-bar-goto-menu [find-tag]
 345   '(menu-item "Find Tag..." find-tag
 346               :help "Find definition of function or variable"))
 347
 348 (define-key menu-bar-goto-menu [separator-tags]
 349   '(menu-item "--"))
 350
 351 (define-key menu-bar-goto-menu [end-of-buf]
 352   '(menu-item "Goto End of Buffer" end-of-buffer))
 353 (define-key menu-bar-goto-menu [beg-of-buf]
 354   '(menu-item "Goto Beginning of Buffer" beginning-of-buffer))
 355 (define-key menu-bar-goto-menu [go-to-pos]
 356   '(menu-item "Goto Buffer Position..." goto-char
 357               :help "Read a number N and go to buffer position N"))
 358 (define-key menu-bar-goto-menu [go-to-line]
 359   '(menu-item "Goto Line..." goto-line
 360               :help "Read a line number and go to that line"))
 361
 362 (define-key menu-bar-edit-menu [goto]
 363   (list 'menu-item "Go To" menu-bar-goto-menu))
 364
 365 (define-key menu-bar-edit-menu [search]
 366   (list 'menu-item "Search" menu-bar-search-menu))
 367
 368 (define-key menu-bar-edit-menu [fill]
 369   '(menu-item "Fill" fill-region
 370               :enable (and mark-active (not buffer-read-only))
 371               :help
 372               "Fill text in region to fit between left and right margin"))
 373 (define-key menu-bar-edit-menu [mark-whole-buffer]
 374   '(menu-item "Select All" mark-whole-buffer
 375               :help "Mark the whole buffer for a subsequent cut/copy."))
 376 (define-key menu-bar-edit-menu [clear]
 377   '(menu-item "Clear" delete-region
 378               :enable (and mark-active
 379                            (not buffer-read-only)
 380                            (not (mouse-region-match)))
 381               :help
 382               "Delete the text in region between mark and current position"))
 383 (defvar yank-menu (cons "Select Yank" nil))
 384 (fset 'yank-menu (cons 'keymap yank-menu))
 385 (define-key menu-bar-edit-menu [select-paste]
 386   '(menu-item "Select and Paste" yank-menu
 387               :enable (and (cdr yank-menu) (not buffer-read-only))
 388               :help "Paste text cut/copied earlier"))
 389 (define-key menu-bar-edit-menu [paste]
 390   '(menu-item "Paste" yank
 391               :enable (and (x-selection-exists-p) (not buffer-read-only))
 392               :help "Paste text most recently cut/copied"))
 393 (define-key menu-bar-edit-menu [copy]
 394   '(menu-item "Copy" menu-bar-kill-ring-save
 395               :enable mark-active
 396               :help "Copy text in region between mark and current position"))
 397 (define-key menu-bar-edit-menu [cut]
 398   '(menu-item "Cut" kill-region
 399               :enable (and mark-active (not buffer-read-only))
 400               :help
 401               "Cut (kill) text in region between mark and current position"))
 402 (define-key menu-bar-edit-menu [undo]
 403   '(menu-item "Undo" undo
 404               :enable (and (not buffer-read-only)
 405                            (not (eq t buffer-undo-list))
 406                            (if (eq last-command 'undo)
 407                                pending-undo-list
 408                              (consp buffer-undo-list)))
 409               :help "Undo last operation"))
 410
 411
 412 (defun menu-bar-kill-ring-save (beg end)
 413   (interactive "r")
 414   (if (mouse-region-match)
 415       (message "Selecting a region with the mouse does `copy' automatically")
 416     (kill-ring-save beg end)))
 417
 418 (autoload 'ispell-menu-map "ispell" nil t 'keymap)
 419
 420 ;; These are alternative definitions for the cut, paste and copy
 421 ;; menu items.  Use them if your system expects these to use the clipboard.
 422
 423 (put 'clipboard-kill-region 'menu-enable 'mark-active)
 424 (put 'clipboard-kill-ring-save 'menu-enable 'mark-active)
 425 (put 'clipboard-yank 'menu-enable
 426      '(or (x-selection-exists-p) (x-selection-exists-p 'CLIPBOARD)))
 427
 428 (defun clipboard-yank ()
 429   "Insert the clipboard contents, or the last stretch of killed text."
 430   (interactive)
 431   (let ((x-select-enable-clipboard t))
 432     (yank)))
 433
 434 (defun clipboard-kill-ring-save (beg end)
 435   "Copy region to kill ring, and save in the X clipboard."
 436   (interactive "r")
 437   (let ((x-select-enable-clipboard t))
 438     (kill-ring-save beg end)))
 439
 440 (defun clipboard-kill-region (beg end)
 441   "Kill the region, and save it in the X clipboard."
 442   (interactive "r")
 443   (let ((x-select-enable-clipboard t))
 444     (kill-region beg end)))
 445
 446 (defun menu-bar-enable-clipboard ()
 447   "Make CUT, PASTE and COPY (keys and menu bar items) use the clipboard.
 448 Do the same for the keys of the same name."
 449   (interactive)
 450   ;; We can't use constant list structure here because it becomes pure,
 451   ;; and because it gets modified with cache data.
 452   (define-key menu-bar-edit-menu [paste]
 453     (cons "Paste" (cons "Paste text from clipboard" 'clipboard-yank)))
 454   (define-key menu-bar-edit-menu [copy]
 455     (cons "Copy" (cons "Copy text in region to the clipboard"
 456                        'clipboard-kill-ring-save)))
 457   (define-key menu-bar-edit-menu [cut]
 458     (cons "Cut" (cons "Delete text in region and copy it to the clipboard"
 459                       'clipboard-kill-region)))
 460
 461   (define-key global-map [f20] 'clipboard-kill-region)
 462   (define-key global-map [f16] 'clipboard-kill-ring-save)
 463   (define-key global-map [f18] 'clipboard-yank)
 464   ;; X11R6 versions
 465   (define-key global-map [cut] 'clipboard-kill-region)
 466   (define-key global-map [copy] 'clipboard-kill-ring-save)
 467   (define-key global-map [paste] 'clipboard-yank))
 468 \f
 469 ;; The "Options" menu items
 470
 471 (defvar menu-bar-custom-menu (make-sparse-keymap "Customize"))
 472
 473 (define-key menu-bar-custom-menu [customize-apropos-groups]
 474   '(menu-item "Groups Matching Regexp..." customize-apropos-groups
 475               :help "Browse groups whose names match regexp"))
 476 (define-key menu-bar-custom-menu [customize-apropos-faces]
 477   '(menu-item "Faces Matching Regexp..." customize-apropos-faces
 478               :help "Browse faces whose names match regexp"))
 479 (define-key menu-bar-custom-menu [customize-apropos-options]
 480   '(menu-item "Options Matching Regexp..." customize-apropos-options
 481               :help "Browse options whose names match regexp"))
 482 (define-key menu-bar-custom-menu [customize-apropos]
 483   '(menu-item "Settings Matching Regexp..." customize-apropos
 484               :help "Browse customizable settings whose names match regexp"))
 485 (define-key menu-bar-custom-menu [separator-2]
 486   '("--"))
 487 (define-key menu-bar-custom-menu [customize-group]
 488   '(menu-item "Specific Group..." customize-group
 489               :help "Customize settings of specific group"))
 490 (define-key menu-bar-custom-menu [customize-face]
 491   '(menu-item "Specific Face..." customize-face
 492               :help "Customize attributes of specific face"))
 493 (define-key menu-bar-custom-menu [customize-option]
 494   '(menu-item "Specific Option..." customize-option
 495               :help "Change value of specific option"))
 496 (define-key menu-bar-custom-menu [customize-changed-options]
 497   '(menu-item "Recently Changed Options..." customize-changed-options
 498               :help "Customize options changed in recent versions"))
 499 (define-key menu-bar-custom-menu [separator-3]
 500   '("--"))
 501 (define-key menu-bar-custom-menu [customize-browse]
 502   '(menu-item "Browse Customization Groups" customize-browse
 503               :help "Browse all customization groups"))
 504 (define-key menu-bar-custom-menu [customize]
 505   '(menu-item "Top-level Customization Group" customize
 506               :help "The master group called `Emacs'"))
 507
 508 ;(defvar menu-bar-preferences-menu (make-sparse-keymap "Preferences"))
 509
 510 (defmacro menu-bar-make-toggle (name variable doc message help &rest body)
 511   `(progn
 512      (defun ,name ()
 513        ,(concat doc ".")
 514        (interactive)
 515        (if ,(if body `(progn . ,body)
 516               `(setq ,variable (not ,variable)))
 517            (message ,message "enabled")
 518          (message ,message "disabled")))
 519      '(menu-item ,doc ,name
 520                  :help ,help
 521                  :button (:toggle . (and (boundp ',variable) ,variable)))))
 522
 523 ;;; Assemble all the top-level items of the "Options" menu
 524 (define-key menu-bar-options-menu [customize]
 525   (list 'menu-item "Customize Emacs" menu-bar-custom-menu
 526         :help "Full customization of every Emacs feature"))
 527
 528 (defun menu-bar-options-save ()
 529   "Save current values of Options menu items using Custom."
 530   (interactive)
 531   (dolist (elt '(debug-on-quit debug-on-error auto-compression-mode
 532                  case-fold-search truncate-lines show-paren-mode
 533                  transient-mark-mode global-font-lock-mode
 534                  current-language-environment default-input-method))
 535     (if (default-value elt)
 536         (customize-save-variable elt (default-value elt))))
 537   (if (memq 'turn-on-auto-fill text-mode-hook)
 538       (customize-save-variable 'text-mode-hook
 539                                (default-value 'text-mode-hook)))
 540   (if (featurep 'saveplace)
 541       (customize-save-variable 'save-place (default-value 'save-place)))
 542   (if (featurep 'uniquify)
 543       (customize-save-variable 'uniquify-buffer-name-style
 544                                (default-value 'uniquify-buffer-name-style))))
 545
 546 (define-key menu-bar-options-menu [save]
 547   '(menu-item "Save Options" menu-bar-options-save
 548               :help "Save options set from the menu above"))
 549
 550 (define-key menu-bar-options-menu [custom-separator]
 551   '("--"))
 552
 553 (define-key menu-bar-options-menu [mule]
 554   ;; It is better not to use backquote here,
 555   ;; because that makes a bootstrapping problem
 556   ;; if you need to recompile all the Lisp files using interpreted code.
 557   (list 'menu-item "Mule (Multilingual Environment)" mule-menu-keymap
 558 ;; Most of the MULE menu actually does make sense in unibyte mode,
 559 ;; e.g. language selection.
 560 ;;;     ':visible 'default-enable-multibyte-characters
 561         ':help "Default language, encodings, input method"))
 562 ;(setq menu-bar-final-items (cons 'mule menu-bar-final-items))
 563 ;(define-key menu-bar-options-menu [preferences]
 564 ;  (list 'menu-item "Preferences" menu-bar-preferences-menu
 565 ;       :help "Toggle important global options"))
 566
 567 (define-key menu-bar-options-menu [mule-separator]
 568   '("--"))
 569
 570 (define-key menu-bar-options-menu [debug-on-quit]
 571   (menu-bar-make-toggle toggle-debug-on-quit debug-on-quit
 572                         "Enter Debugger on Quit/C-g" "Debug on Quit %s"
 573                         "Enter Lisp debugger when C-g is pressed"))
 574 (define-key menu-bar-options-menu [debug-on-error]
 575   (menu-bar-make-toggle toggle-debug-on-error debug-on-error
 576                         "Enter Debugger on Error" "Debug on Error %s"
 577                         "Enter Lisp debugger when error is signaled"))
 578 (define-key menu-bar-options-menu [debugger-separator]
 579   '("--"))
 580 (define-key menu-bar-options-menu [toggle-auto-compression]
 581   '(menu-item "Automatic File De/compression"
 582              auto-compression-mode
 583              :help "Transparently decompress compressed files"
 584              :button (:toggle . (rassq 'jka-compr-handler
 585                                        file-name-handler-alist))))
 586 (define-key menu-bar-options-menu [save-place]
 587   (menu-bar-make-toggle toggle-save-place-globally save-place
 588                         "Save Place in Files between Sessions"
 589                         "Saving place in files %s"
 590                         "Save Emacs state for next session"
 591                         (require 'saveplace)
 592                         (setq-default save-place
 593                                       (not (default-value save-place)))))
 594 (define-key menu-bar-options-menu [uniquify]
 595   (menu-bar-make-toggle toggle-uniquify-buffer-names uniquify-buffer-name-style
 596                         "Use Directory Names in Buffer Names"
 597                         "Directory name in buffer names (uniquify) %s"
 598                         "Uniquify a buffer name by adding parent directory names until unique"
 599                         (require 'uniquify)
 600                         (setq uniquify-buffer-name-style
 601                               (if (not uniquify-buffer-name-style)
 602                                   'forward))))
 603 (define-key menu-bar-options-menu [edit-options-separator]
 604   '("--"))
 605 (define-key menu-bar-options-menu [case-fold-search]
 606   (menu-bar-make-toggle toggle-case-fold-search case-fold-search
 607                         "Case-Insensitive Search"
 608                         "Case-Insensitive Search %s"
 609                         "If checked, search ignores letter-case"))
 610 (define-key menu-bar-options-menu [auto-fill-mode]
 611   '(menu-item "Word Wrap in Text Modes (Auto Fill)"
 612               toggle-text-mode-auto-fill
 613               :help "Automatically fill text between left and right margins"
 614               :button (:toggle . (member 'turn-on-auto-fill text-mode-hook))))
 615 (define-key menu-bar-options-menu [truncate-lines]
 616   (menu-bar-make-toggle
 617    toggle-truncate-lines truncate-lines
 618    "Truncate Long Lines in this Buffer" "Long Line Truncation %s"
 619    "If checked, long lines are truncated on the screen"
 620    (prog1 (setq truncate-lines (not truncate-lines))
 621      (set-buffer-modified-p (buffer-modified-p)))))
 622 (define-key menu-bar-options-menu [highlight-separator]
 623   '("--"))
 624 (define-key menu-bar-options-menu [highlight-paren-mode]
 625   (menu-bar-make-toggle toggle-highlight-paren-mode show-paren-mode
 626                         "Highlight Matching Parentheses"
 627                         "Show Paren mode %s"
 628                         "Highlight matching and mismatched parentheses"))
 629 (define-key menu-bar-options-menu [transient-mark-mode]
 630   (menu-bar-make-toggle toggle-transient-mark-mode transient-mark-mode
 631                         "Transient Mark Mode (highlights region)"
 632                         "Transient Mark mode %s"
 633                         "Highlight the marked region when it's active"))
 634 (define-key menu-bar-options-menu [toggle-global-lazy-font-lock-mode]
 635   (menu-bar-make-toggle toggle-global-lazy-font-lock-mode global-font-lock-mode
 636                         "Highlight Syntax (Global Font Lock)"
 637                         "Syntax Highlighting %s"
 638                         "Highlights text based on language syntax"
 639                         (global-font-lock-mode)))
 640
 641 \f
 642 ;; The "Tools" menu items
 643
 644 (defun send-mail-item-name ()
 645   (let* ((known-send-mail-commands '((sendmail-user-agent . "sendmail")
 646                                      (mh-e-user-agent . "MH")
 647                                      (message-user-agent . "Gnus Message")
 648                                      (gnus-user-agent . "Gnus")))
 649          (name (assq mail-user-agent known-send-mail-commands)))
 650     (if name
 651         (setq name (cdr name))
 652       (setq name (symbol-name mail-user-agent))
 653       (if (string-match "\\(.+\\)-user-agent" name)
 654           (setq name (match-string 1 name))))
 655     name))
 656
 657 (defun read-mail-item-name ()
 658   (let* ((known-rmail-commands '((rmail . "RMAIL")
 659                                  (mh-rmail . "MH")
 660                                  (gnus . "Gnus")))
 661          (known (assq read-mail-command known-rmail-commands)))
 662     (if known (cdr known) (symbol-name read-mail-command))))
 663
 664 (defvar menu-bar-games-menu (make-sparse-keymap "Games"))
 665
 666 (define-key menu-bar-tools-menu [games]
 667   (list 'menu-item "Games" menu-bar-games-menu))
 668
 669 (define-key menu-bar-tools-menu [separator-games]
 670   '("--"))
 671
 672 (define-key menu-bar-games-menu [zone]
 673   '(menu-item "Zone Out"  zone
 674               :help "Play tricks with Emacs display when Emacs is idle"))
 675 (define-key menu-bar-games-menu [yow]
 676   '(menu-item "Random Quotation"  yow
 677               :help "Display a random Zippy quotation"))
 678 (define-key menu-bar-games-menu [tetris]
 679   '(menu-item "Tetris"  tetris))
 680 (define-key menu-bar-games-menu [solitaire]
 681   '(menu-item "Solitaire"  solitaire))
 682 (define-key menu-bar-games-menu [snake]
 683   '(menu-item "Snake"  snake
 684               :help "Move snake around avoiding collisions"))
 685 (define-key menu-bar-games-menu [mult]
 686   '(menu-item "Multiplication Puzzle"  mpuz
 687               :help "Excercise brain with multiplication"))
 688 (define-key menu-bar-games-menu [life]
 689   '(menu-item "Life"  life
 690               :help "Watch how John Conway's cellular automaton evolves"))
 691 (define-key menu-bar-games-menu [hanoi]
 692   '(menu-item "Towers of Hanoi" hanoi
 693               :help "Watch Towers-of-Hanoi puzzle solved by Emacs"))
 694 (define-key menu-bar-games-menu [gomoku]
 695   '(menu-item "Gomoku"  gomoku
 696               :help "Mark 5 contiguous squares (like tic-tac-toe)"))
 697 (define-key menu-bar-games-menu [black-box]
 698   '(menu-item "Blackbox"  blackbox
 699               :help "Find balls in a black box by shooting rays"))
 700 (define-key menu-bar-games-menu [adventure]
 701   '(menu-item "Adventure"  dunnet
 702               :help "Dunnet, a text Adventure game for Emacs"))
 703 (define-key menu-bar-games-menu [5x5]
 704   '(menu-item "5x5" 5x5
 705               :help "Fill in all the squares on a 5x5 board"))
 706
 707 (define-key menu-bar-tools-menu [calendar]
 708   '(menu-item "Display Calendar" calendar))
 709 (define-key menu-bar-tools-menu [speedbar]
 710   '(menu-item "Display Speedbar" speedbar-frame-mode))
 711 (define-key menu-bar-tools-menu [directory-search]
 712   '(menu-item "Directory Search" eudc-tools-menu
 713               :help "Query directory servers via LDAP, CCSO PH/QI or BBDB"))
 714 (define-key menu-bar-tools-menu [compose-mail]
 715   (list
 716    'menu-item `(format "Send Mail (with %s)" (send-mail-item-name))
 717    'compose-mail
 718    :visible `(and mail-user-agent (not (eq mail-user-agent 'ignore)))
 719    :help "Send a mail message"))
 720 (define-key menu-bar-tools-menu [rmail]
 721   (list
 722    'menu-item `(format "Read Mail (with %s)" (read-mail-item-name))
 723    (lambda ()
 724      (interactive)
 725      (call-interactively read-mail-command))
 726    :visible `(and read-mail-command (not (eq read-mail-command 'ignore)))
 727    :help "Read your mail and reply to it"))
 728 (define-key menu-bar-tools-menu [gnus]
 729   '(menu-item "Read Net News (Gnus)" gnus
 730               :help "Read network news groups"))
 731
 732 (define-key menu-bar-tools-menu [separator-vc]
 733   '("--"))
 734
 735 (defvar vc-menu-map (make-sparse-keymap "Version Control"))
 736 (define-key menu-bar-tools-menu [pcl-cvs]
 737   `(menu-item "PCL-CVS" ,cvs-global-menu
 738               :help "Module-level interface to CVS"))
 739 (define-key menu-bar-tools-menu [vc]
 740   (list 'menu-item "Version Control" vc-menu-map
 741         :help "Interface to RCS, CVS, SCCS"))
 742
 743 (define-key menu-bar-tools-menu [separator-compare]
 744   '("--"))
 745
 746 (define-key menu-bar-tools-menu [ediff-misc]
 747   '(menu-item "Ediff Miscellanea" menu-bar-ediff-misc-menu
 748               :help "Ediff manual, customization, sessions, etc."))
 749 (define-key menu-bar-tools-menu [epatch]
 750   '(menu-item "Apply Patch" menu-bar-epatch-menu))
 751 (define-key menu-bar-tools-menu [ediff-merge]
 752   '(menu-item "Merge" menu-bar-ediff-merge-menu
 753               :help "Merge different revisions of files/directories"))
 754 (define-key menu-bar-tools-menu [compare]
 755   '(menu-item "Compare (Ediff)" menu-bar-ediff-menu
 756               :help "Display differences between files/directories"))
 757
 758
 759 (define-key menu-bar-tools-menu [separator-spell]
 760   '("--"))
 761
 762 (define-key menu-bar-tools-menu [spell]
 763   '(menu-item "Spell Checking" ispell-menu-map))
 764
 765 (define-key menu-bar-tools-menu [separator-prog]
 766   '("--"))
 767
 768 (define-key menu-bar-tools-menu [gdb]
 769   '(menu-item "Debugger (GUD)..." gdb
 770               :help "Debug a program from within Emacs"))
 771 (define-key menu-bar-tools-menu [shell-on-region]
 772   '(menu-item "Shell Command on Region..." shell-command-on-region
 773               :enable mark-active
 774               :help "Pass marked region to a shell command"))
 775 (define-key menu-bar-tools-menu [shell]
 776   '(menu-item "Shell Command..." shell-command
 777               :help "Invoke a shell command and catch its output"))
 778 (define-key menu-bar-tools-menu [compile]
 779   '(menu-item "Compile..." compile
 780               :help "Invoke compiler or Make, view compilation errors"))
 781 (define-key menu-bar-tools-menu [grep]
 782   '(menu-item "Search Files (Grep)..." grep
 783               :help "Search files for strings or regexps (with Grep)"))
 784
 785 \f
 786 ;; The "Help" menu items
 787
 788 (defvar menu-bar-describe-menu (make-sparse-keymap "Describe"))
 789
 790 (define-key menu-bar-describe-menu [mule-diag]
 791   '(menu-item "Show All of Mule Status" mule-diag
 792               :visible default-enable-multibyte-characters
 793               :help "Display multilingual environment settings"))
 794 (define-key menu-bar-describe-menu [describe-coding-system]
 795   '(menu-item "Describe Coding System..." describe-coding-system
 796               :visible default-enable-multibyte-characters))
 797 (define-key menu-bar-describe-menu [describe-input-method]
 798   '(menu-item "Describe Input Method..." describe-input-method
 799               :visible default-enable-multibyte-characters
 800               :help "Keyboard layout for specific input method"))
 801 (define-key menu-bar-describe-menu [describe-language-environment]
 802   (list 'menu-item "Describe Language Environment"
 803         describe-language-environment-map
 804         :help "Show multilingual settings for a specific language"))
 805
 806 (define-key menu-bar-describe-menu [separator-desc-mule]
 807   '("--"))
 808
 809 (define-key menu-bar-describe-menu [list-keybindings]
 810   '(menu-item "List Key Bindings" describe-bindings
 811               :help "Display a list of all current keybindings"))
 812 (define-key menu-bar-describe-menu [list-keybindings]
 813   '(menu-item "List Key Bindings" describe-bindings
 814               :help "Display a list of all current keybindings"))
 815 (define-key menu-bar-describe-menu [describe-variable]
 816   '(menu-item "Describe Variable..." describe-variable
 817               :help "Display documentation of variable/option"))
 818 (define-key menu-bar-describe-menu [describe-function]
 819   '(menu-item "Describe Function..." describe-function
 820               :help "Display documentation of function/command"))
 821 (define-key menu-bar-describe-menu [describe-key]
 822   '(menu-item "Describe Key..." describe-key
 823               ;; Users typically don't identify keys and menu items...
 824               :help "Display documentation of command bound to a \
 825 key (or menu-item)"))
 826 (define-key menu-bar-describe-menu [apropos-variables]
 827   '(menu-item "Apropos Variables..." apropos-variable
 828               :help "List variables whose names match a regexp"))
 829 (define-key menu-bar-describe-menu [apropos-commands]
 830   '(menu-item "Apropos Commands..." apropos-command
 831               :help "List commands whose names match a regexp"))
 832 (define-key menu-bar-describe-menu [describe-mode]
 833   '(menu-item "Describe Buffer Modes" describe-mode
 834               :help "Describe this buffer's major and minor mode"))
 835
 836 (defvar menu-bar-manuals-menu (make-sparse-keymap "Manuals"))
 837
 838 (define-key menu-bar-manuals-menu [man]
 839   '(menu-item "Read Man Page..." manual-entry
 840               :help "Man-page docs for external commands and libraries"))
 841 (define-key menu-bar-manuals-menu [sep2]
 842   '("--"))
 843 (define-key menu-bar-manuals-menu [info]
 844   '(menu-item "Browse Manuals with Info" Info-directory
 845               :help "Read any of the installed manuals"))
 846 (define-key menu-bar-manuals-menu [command]
 847   '(menu-item "Find Command in Manual" Info-goto-emacs-command-node
 848               :help "Display manual section that describes a command"))
 849 (define-key menu-bar-manuals-menu [key]
 850   '(menu-item "Find Key in Manual" Info-goto-emacs-key-command-node
 851               :help "Display manual section that describes a key"))
 852
 853 (define-key menu-bar-help-menu [eliza]
 854   '(menu-item "Emacs Psychiatrist" doctor
 855               :help "Our doctor will help you feel better"))
 856 (define-key menu-bar-help-menu [sep3]
 857   '("--"))
 858 (define-key menu-bar-help-menu [describe-no-warranty]
 859   '(menu-item "(Non)Warranty" describe-no-warranty
 860               :help "Explain that Emacs has NO WARRANTY"))
 861 (define-key menu-bar-help-menu [describe-copying]
 862   '(menu-item "Copying Conditions" describe-copying
 863               :help "Show the Emacs license (GPL)"))
 864 (define-key menu-bar-help-menu [describe-distribution]
 865   '(menu-item "Getting New Versions" describe-distribution
 866               :help "How to get latest versions of Emacs"))
 867 (define-key menu-bar-help-menu [more]
 868   '(menu-item "Find Extra Packages"
 869               (lambda ()
 870                 (interactive)
 871                 (let (enable-local-variables)
 872                   (view-file (expand-file-name "MORE.STUFF"
 873                                                data-directory))
 874                   (goto-address)))
 875               :help "Where to find some extra packages and possible updates"))
 876 (define-key menu-bar-help-menu [emacs-version]
 877   '(menu-item "Show Emacs Version" emacs-version))
 878 (define-key menu-bar-help-menu [sep2]
 879   '("--"))
 880 (define-key menu-bar-help-menu [finder-by-keyword]
 881   '(menu-item "Find Emacs Packages..." finder-by-keyword
 882               :help "Find packages and features by keyword"))
 883 (define-key menu-bar-help-menu [describe]
 884   (list 'menu-item "Describe" menu-bar-describe-menu
 885         :help "Describe commands, variables, keys"))
 886 (define-key menu-bar-help-menu [manuals]
 887   (list 'menu-item "Manuals" menu-bar-manuals-menu
 888         :help "Lookup commands and keys in docs, read manuals"))
 889 (define-key menu-bar-help-menu [sep1]
 890   '("--"))
 891 (define-key menu-bar-help-menu [report-emacs-bug]
 892   '(menu-item "Send Bug Report..." report-emacs-bug
 893               :help "Send e-mail to Emacs maintainers"))
 894 (define-key menu-bar-help-menu [emacs-manual]
 895   '(menu-item "Read the Emacs Manual"
 896               (lambda () (interactive) (info "emacs"))))
 897 (define-key menu-bar-help-menu [emacs-problems]
 898   '(menu-item "Emacs Known Problems" view-emacs-problems))
 899 (define-key menu-bar-help-menu [emacs-news]
 900   '(menu-item "Emacs News" view-emacs-news
 901               :help "New features of this version"))
 902 (define-key menu-bar-help-menu [emacs-faq]
 903   '(menu-item "Emacs FAQ" view-emacs-FAQ))
 904 (define-key menu-bar-help-menu [emacs-tutorial-language-specific]
 905   '(menu-item "Emacs Tutorial (choose language)..."
 906               (lambda () (interactive) (help-with-tutorial t))
 907               :help "Learn how to use Emacs (choose a language)"))
 908 (define-key menu-bar-help-menu [emacs-tutorial]
 909   '(menu-item "Emacs Tutorial" help-with-tutorial
 910               :help "Learn how to use Emacs"))
 911
 912 (defun kill-this-buffer ()      ; for the menubar
 913   "Kill the current buffer."
 914   (interactive)
 915   (kill-buffer (current-buffer)))
 916
 917 (defun kill-this-buffer-enabled-p ()
 918   (let ((count 0)
 919         (buffers (buffer-list)))
 920     (while buffers
 921       (or (string-match "^ " (buffer-name (car buffers)))
 922           (setq count (1+ count)))
 923       (setq buffers (cdr buffers)))
 924     (and (not (window-minibuffer-p (frame-selected-window menu-updating-frame)))
 925          (> count 1))))
 926
 927 (put 'dired 'menu-enable
 928      '(not (window-minibuffer-p (frame-selected-window menu-updating-frame))))
 929
 930 ;; Permit deleting frame if it would leave a visible or iconified frame.
 931 (defun delete-frame-enabled-p ()
 932   "Return non-nil if `delete-frame' should be enabled in the menu bar."
 933   (let ((frames (frame-list))
 934         (count 0))
 935     (while frames
 936       (if (frame-visible-p (car frames))
 937           (setq count (1+ count)))
 938       (setq frames (cdr frames)))
 939     (> count 1)))
 940
 941 (defcustom yank-menu-length 20
 942   "*Maximum length to display in the yank-menu."
 943   :type 'integer
 944   :group 'mouse)
 945
 946 (defun menu-bar-update-yank-menu (string old)
 947   (let ((front (car (cdr yank-menu)))
 948         (menu-string (if (<= (length string) yank-menu-length)
 949                          string
 950                        (concat
 951                         (substring string 0 (/ yank-menu-length 2))
 952                         "..."
 953                         (substring string (- (/ yank-menu-length 2)))))))
 954     ;; Don't let the menu string be all dashes
 955     ;; because that has a special meaning in a menu.
 956     (if (string-match "\\`-+\\'" menu-string)
 957         (setq menu-string (concat menu-string " ")))
 958     ;; If we're supposed to be extending an existing string, and that
 959     ;; string really is at the front of the menu, then update it in place.
 960     (if (and old (or (eq old (car front))
 961                      (string= old (car front))))
 962         (progn
 963           (setcar front string)
 964           (setcar (cdr front) menu-string))
 965       (setcdr yank-menu
 966               (cons
 967                (cons string (cons menu-string 'menu-bar-select-yank))
 968                (cdr yank-menu)))))
 969   (if (> (length (cdr yank-menu)) kill-ring-max)
 970       (setcdr (nthcdr kill-ring-max yank-menu) nil)))
 971
 972 (put 'menu-bar-select-yank 'apropos-inhibit t)
 973 (defun menu-bar-select-yank ()
 974   (interactive "*")
 975   (push-mark (point))
 976   (insert last-command-event))
 977 \f
 978 (defvar list-buffers-directory nil)
 979
 980 (defvar menu-bar-update-buffers-maxbuf)
 981
 982 (defun menu-bar-select-buffer ()
 983   (interactive)
 984   (switch-to-buffer last-command-event))
 985
 986 (defun menu-bar-select-frame ()
 987   (interactive)
 988   (make-frame-visible last-command-event)
 989   (raise-frame last-command-event)
 990   (select-frame last-command-event))
 991
 992 (defun menu-bar-update-buffers-1 (elt)
 993   (cons (format
 994          (format "%%%ds  %%s%%s  %%s" menu-bar-update-buffers-maxbuf)
 995          (cdr elt)
 996          (if (buffer-modified-p (car elt))
 997              "*" " ")
 998          (save-excursion
 999            (set-buffer (car elt))
1000            (if buffer-read-only "%" " "))
1001          (let ((file
1002                 (or (buffer-file-name (car elt))
1003                     (save-excursion
1004                       (set-buffer (car elt))
1005                       list-buffers-directory)
1006                     "")))
1007            (setq file (or (file-name-directory file)
1008                           ""))
1009            (if (> (length file) 20)
1010                (setq file (concat "..." (substring file -17))))
1011            file))
1012         (car elt)))
1013
1014 (defvar menu-bar-buffers-menu-list-buffers-entry nil)
1015
1016 (defun menu-bar-update-buffers ()
1017   ;; If user discards the Buffers item, play along.
1018   (and (lookup-key (current-global-map) [menu-bar buffer])
1019        (frame-or-buffer-changed-p)
1020        (let ((buffers (buffer-list))
1021              (frames (frame-list))
1022              (maxlen 0)
1023              buffers-menu frames-menu)
1024          ;; If requested, list only the N most recently selected buffers.
1025          (if (and (integerp buffers-menu-max-size)
1026                   (> buffers-menu-max-size 1))
1027              (if (> (length buffers) buffers-menu-max-size)
1028                  (setcdr (nthcdr buffers-menu-max-size buffers) nil)))
1029
1030          ;; Make the menu of buffers proper.
1031          (setq buffers-menu
1032                (cons "Select Buffer"
1033                      (let* ((buffer-list
1034                              (mapcar 'list buffers))
1035                             tail
1036                             (menu-bar-update-buffers-maxbuf 0)
1037                             alist
1038                             head)
1039                        ;; Put into each element of buffer-list
1040                        ;; the name for actual display,
1041                        ;; perhaps truncated in the middle.
1042                        (setq tail buffer-list)
1043                        (while tail
1044                          (let ((name (buffer-name (car (car tail)))))
1045                            (setcdr (car tail)
1046                                    (if (> (length name) 27)
1047                                        (concat (substring name 0 12)
1048                                                "..."
1049                                                (substring name -12))
1050                                      name)))
1051                          (setq tail (cdr tail)))
1052                        ;; Compute the maximum length of any name.
1053                        (setq tail buffer-list)
1054                        (while tail
1055                          (or (eq ?\ (aref (cdr (car tail)) 0))
1056                              (setq menu-bar-update-buffers-maxbuf
1057                                    (max menu-bar-update-buffers-maxbuf
1058                                         (length (cdr (car tail))))))
1059                          (setq tail (cdr tail)))
1060                        ;; Set ALIST to an alist of the form
1061                        ;; ITEM-STRING . BUFFER
1062                        (setq tail buffer-list)
1063                        (while tail
1064                          (let ((elt (car tail)))
1065                            (or (eq ?\ (aref (cdr elt) 0))
1066                                (setq alist (cons
1067                                             (menu-bar-update-buffers-1 elt)
1068                                             alist)))
1069                            (and alist (> (length (car (car alist))) maxlen)
1070                                 (setq maxlen (length (car (car alist))))))
1071                          (setq tail (cdr tail)))
1072                        (setq alist (nreverse alist))
1073                        ;; Make the menu item for list-buffers
1074                        ;; or reuse the one we already have.
1075                        ;; The advantage in reusing one
1076                        ;; is that it already has the keyboard equivalent
1077                        ;; cached, so we save the time to look that up again.
1078                        (or menu-bar-buffers-menu-list-buffers-entry
1079                            (setq menu-bar-buffers-menu-list-buffers-entry
1080                                  (cons
1081                                   'list-buffers
1082                                   (cons
1083                                    ""
1084                                    'list-buffers))))
1085                        ;; Update the item string for menu's new width.
1086                        (setcar (cdr menu-bar-buffers-menu-list-buffers-entry)
1087                                (concat (make-string (max (- (/ maxlen 2) 8) 0)
1088                                                     ?\ )
1089                                        "List All Buffers"))
1090                        ;; Now make the actual list of items,
1091                        ;; ending with the list-buffers item.
1092                        (nconc (mapcar (lambda (pair)
1093                                         ;; This is somewhat risque, to use
1094                                         ;; the buffer name itself as the event
1095                                         ;; type to define, but it works.
1096                                         ;; It would not work to use the buffer
1097                                         ;; since a buffer as an event has its
1098                                         ;; own meaning.
1099                                         (nconc (list (buffer-name (cdr pair))
1100                                                      (car pair)
1101                                                      (cons nil nil))
1102                                                'menu-bar-select-buffer))
1103                                       alist)
1104                               (list menu-bar-buffers-menu-list-buffers-entry)))))
1105
1106
1107          ;; Make a Frames menu if we have more than one frame.
1108          (if (cdr frames)
1109              (let ((name (concat (make-string (max (- (/ maxlen 2) 3) 0)
1110                                               ?\ )
1111                                  "Frames"))
1112                    (frames-menu
1113                     (cons 'keymap
1114                           (cons "Select Frame"
1115                                 (mapcar
1116                                  (lambda (frame)
1117                                    (nconc
1118                                     (list frame
1119                                           (frame-parameter frame 'name)
1120                                           (cons nil nil))
1121                                           'menu-bar-select-frame))
1122                                         frames)))))
1123                ;; Put it underneath the Buffers menu.
1124                (setq buffers-menu (cons (cons 'frames (cons name frames-menu))
1125                                         buffers-menu))))
1126          (if buffers-menu
1127              (setq buffers-menu (cons 'keymap buffers-menu)))
1128          (define-key (current-global-map) [menu-bar buffer]
1129            (cons "Buffers" buffers-menu)))))
1130
1131 (add-hook 'menu-bar-update-hook 'menu-bar-update-buffers)
1132
1133 (menu-bar-update-buffers)
1134
1135 ;; this version is too slow
1136 ;;;(defun format-buffers-menu-line (buffer)
1137 ;;;  "Returns a string to represent the given buffer in the Buffer menu.
1138 ;;;nil means the buffer shouldn't be listed.  You can redefine this."
1139 ;;;  (if (string-match "\\` " (buffer-name buffer))
1140 ;;;      nil
1141 ;;;    (save-excursion
1142 ;;;     (set-buffer buffer)
1143 ;;;     (let ((size (buffer-size)))
1144 ;;;       (format "%s%s %-19s %6s %-15s %s"
1145 ;;;            (if (buffer-modified-p) "*" " ")
1146 ;;;            (if buffer-read-only "%" " ")
1147 ;;;            (buffer-name)
1148 ;;;            size
1149 ;;;            mode-name
1150 ;;;            (or (buffer-file-name) ""))))))
1151 \f
1152 ;;; Set up a menu bar menu for the minibuffer.
1153
1154 (dolist (map (list minibuffer-local-ns-map
1155                    minibuffer-local-must-match-map
1156                    minibuffer-local-isearch-map
1157                    minibuffer-local-map
1158                    minibuffer-local-completion-map))
1159   (define-key map [menu-bar minibuf]
1160     (cons "Minibuf" (make-sparse-keymap "Minibuf"))))
1161
1162 (dolist (map (list minibuffer-local-must-match-map
1163                    minibuffer-local-completion-map))
1164   (define-key map [menu-bar minibuf ?\?]
1165     (list 'menu-item "List Completions" 'minibuffer-completion-help
1166           :help "Display all possible completions"))
1167   (define-key map [menu-bar minibuf space]
1168     (list 'menu-item "Complete Word" 'minibuffer-complete-word
1169           :help "Complete at most one word"))
1170   (define-key map [menu-bar minibuf tab]
1171     (list 'menu-item "Complete" 'minibuffer-complete
1172           :help "Complete as far as possible")))
1173
1174 (dolist (map (list minibuffer-local-ns-map
1175                    minibuffer-local-must-match-map
1176                    minibuffer-local-isearch-map
1177                    minibuffer-local-map
1178                    minibuffer-local-completion-map))
1179   (define-key map [menu-bar minibuf quit]
1180     (list 'menu-item "Quit" 'keyboard-escape-quit
1181           :help "Abort input and exit minibuffer"))
1182   (define-key map [menu-bar minibuf return]
1183     (list 'menu-item "Enter" 'exit-minibuffer
1184           :help "Terminate input and exit minibuffer")))
1185 \f
1186 (defcustom menu-bar-mode nil
1187   "Toggle display of a menu bar on each frame.
1188 Setting this variable directly does not take effect;
1189 use either \\[customize] or the function `menu-bar-mode'."
1190   :set (lambda (symbol value)
1191          (menu-bar-mode (or value 0)))
1192   :initialize 'custom-initialize-default
1193   :type 'boolean
1194   :group 'frames)
1195
1196 (defun menu-bar-mode (flag)
1197   "Toggle display of a menu bar on each frame.
1198 This command applies to all frames that exist and frames to be
1199 created in the future.
1200 With a numeric argument, if the argument is positive,
1201 turn on menu bars; otherwise, turn off menu bars."
1202  (interactive "P")
1203
1204   ;; Make menu-bar-mode and default-frame-alist consistent.
1205   (let ((default (assq 'menu-bar-lines default-frame-alist)))
1206     (if default
1207         (setq menu-bar-mode (not (eq (cdr default) 0)))
1208       (setq default-frame-alist
1209             (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
1210                   default-frame-alist))))
1211
1212   ;; Toggle or set the mode, according to FLAG.
1213  (setq menu-bar-mode (if (null flag) (not menu-bar-mode)
1214                        (> (prefix-numeric-value flag) 0)))
1215
1216  ;; Apply it to default-frame-alist.
1217  (let ((parameter (assq 'menu-bar-lines default-frame-alist)))
1218    (if (consp parameter)
1219        (setcdr parameter (if menu-bar-mode 1 0))
1220      (setq default-frame-alist
1221            (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
1222                  default-frame-alist))))
1223
1224  ;; Apply it to existing frames.
1225  (let ((frames (frame-list)))
1226    (while frames
1227      (let ((height (cdr (assq 'height (frame-parameters (car frames))))))
1228        (modify-frame-parameters (car frames)
1229                                 (list (cons 'menu-bar-lines
1230                                           (if menu-bar-mode 1 0))))
1231        (modify-frame-parameters (car frames)
1232                                 (list (cons 'height height))))
1233      (setq frames (cdr frames)))))
1234
1235 (provide 'menu-bar)
1236
1237 ;;; menu-bar.el ends here