code.delx.au - gnu-emacs/blob - 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 ;; Maintainer: FSF
   7 ;; Keywords: internal
   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-search-menu (make-sparse-keymap "Search"))
  54 (define-key global-map [menu-bar search] (cons "Search" menu-bar-search-menu))
  55 (defvar menu-bar-edit-menu (make-sparse-keymap "Edit"))
  56 (define-key global-map [menu-bar edit] (cons "Edit" menu-bar-edit-menu))
  57 (defvar menu-bar-tools-menu (make-sparse-keymap "Tools"))
  58 (define-key global-map [menu-bar tools] (cons "Tools" menu-bar-tools-menu))
  59 (defvar menu-bar-files-menu (make-sparse-keymap "Files"))
  60 (define-key global-map [menu-bar files] (cons "Files" menu-bar-files-menu))
  61
  62 ;; This alias is for compatibility with 19.28 and before.
  63 (defvar menu-bar-file-menu menu-bar-files-menu)
  64 \f
  65 (defvar vc-menu-map (make-sparse-keymap "Version Control"))
  66
  67 (define-key menu-bar-tools-menu [gdb] '("Debugger..." . gdb))
  68 (define-key menu-bar-tools-menu [compile] '("Compile..." . compile))
  69 (define-key menu-bar-tools-menu [grep] '("Search Files..." . grep))
  70
  71 (define-key menu-bar-tools-menu [separator-1]
  72   '("--"))
  73
  74 (define-key menu-bar-tools-menu [calendar] '("Display Calendar" . calendar))
  75 (define-key menu-bar-tools-menu [compose-mail] '("Send Mail" . compose-mail))
  76 (define-key menu-bar-tools-menu [rmail] '("Read Mail" . rmail))
  77 (define-key menu-bar-tools-menu [gnus] '("Read Net News" . gnus))
  78
  79 (define-key menu-bar-tools-menu [separator-vc]
  80   '("--"))
  81
  82 (define-key menu-bar-tools-menu [vc]
  83   (cons "Version Control" vc-menu-map))
  84
  85 (define-key menu-bar-tools-menu [separator-compare]
  86   '("--"))
  87
  88 (define-key menu-bar-tools-menu [ediff-misc]
  89   '("Ediff Miscellanea" . menu-bar-ediff-misc-menu))
  90 (define-key menu-bar-tools-menu [epatch]
  91   '("Apply Patch" . menu-bar-epatch-menu))
  92 (define-key menu-bar-tools-menu [ediff-merge]
  93   '("Merge" . menu-bar-ediff-merge-menu))
  94 (define-key menu-bar-tools-menu [compare]
  95   '("Compare" . menu-bar-ediff-menu))
  96
  97 (define-key menu-bar-tools-menu [separator-print]
  98   '("--"))
  99
 100 (put 'print-region 'menu-enable 'mark-active)
 101 (put 'ps-print-region-with-faces 'menu-enable 'mark-active)
 102
 103 (define-key menu-bar-tools-menu [ps-print-region]
 104   '("Postscript Print Region" . ps-print-region-with-faces))
 105 (define-key menu-bar-tools-menu [ps-print-buffer]
 106   '("Postscript Print Buffer" . ps-print-buffer-with-faces))
 107 (define-key menu-bar-tools-menu [print-region]
 108   '("Print Region" . print-region))
 109 (define-key menu-bar-tools-menu [print-buffer]
 110   '("Print Buffer" . print-buffer))
 111 \f
 112 (define-key menu-bar-files-menu [exit-emacs]
 113   '("Exit Emacs" . save-buffers-kill-emacs))
 114
 115 (define-key menu-bar-files-menu [separator-exit]
 116   '("--"))
 117
 118 (define-key menu-bar-files-menu [one-window]
 119   '("One Window" . delete-other-windows))
 120
 121 (define-key menu-bar-files-menu [split-window]
 122   '("Split Window" . split-window-vertically))
 123
 124 (if (fboundp 'delete-frame)
 125     (progn
 126       ;; Don't use delete-frame as event name
 127       ;; because that is a special event.
 128       (define-key menu-bar-files-menu [delete-this-frame]
 129         '("Delete Frame" . delete-frame))
 130       (define-key menu-bar-files-menu [make-frame-on-display]
 131         '("Open New Display..." . make-frame-on-display))
 132       (define-key menu-bar-files-menu [make-frame]
 133         '("Make New Frame" . make-frame-command))))
 134
 135 (define-key menu-bar-files-menu [separator-buffers]
 136   '("--"))
 137
 138 (define-key menu-bar-files-menu [kill-buffer]
 139   '("Kill Current Buffer" . kill-this-buffer))
 140 (define-key menu-bar-files-menu [insert-file]
 141   '("Insert File..." . insert-file))
 142 (define-key menu-bar-files-menu [revert-buffer]
 143   '("Revert Buffer" . revert-buffer))
 144 (define-key menu-bar-files-menu [write-file]
 145   '("Save Buffer As..." . write-file))
 146 (define-key menu-bar-files-menu [save-buffer] '("Save Buffer" . save-buffer))
 147 (define-key menu-bar-files-menu [dired] '("Open Directory..." . dired))
 148 (define-key menu-bar-files-menu [open-file] '("Open File..." . find-file))
 149
 150 \f
 151 (defun nonincremental-search-forward (string)
 152   "Read a string and search for it nonincrementally."
 153   (interactive "sSearch for string: ")
 154   (if (equal string "")
 155       (search-forward (car search-ring))
 156     (isearch-update-ring string nil)
 157     (search-forward string)))
 158
 159 (defun nonincremental-search-backward (string)
 160   "Read a string and search backward for it nonincrementally."
 161   (interactive "sSearch for string: ")
 162   (if (equal string "")
 163       (search-backward (car search-ring))
 164     (isearch-update-ring string nil)
 165     (search-backward string)))
 166
 167 (defun nonincremental-re-search-forward (string)
 168   "Read a regular expression and search for it nonincrementally."
 169   (interactive "sSearch for regexp: ")
 170   (if (equal string "")
 171       (re-search-forward (car regexp-search-ring))
 172     (isearch-update-ring string t)
 173     (re-search-forward string)))
 174
 175 (defun nonincremental-re-search-backward (string)
 176   "Read a regular expression and search backward for it nonincrementally."
 177   (interactive "sSearch for regexp: ")
 178   (if (equal string "")
 179       (re-search-backward (car regexp-search-ring))
 180     (isearch-update-ring string t)
 181     (re-search-backward string)))
 182
 183 (defun nonincremental-repeat-search-forward ()
 184   "Search forward for the previous search string."
 185   (interactive)
 186   (if (null search-ring)
 187       (error "No previous search"))
 188   (search-forward (car search-ring)))
 189
 190 (defun nonincremental-repeat-search-backward ()
 191   "Search backward for the previous search string."
 192   (interactive)
 193   (if (null search-ring)
 194       (error "No previous search"))
 195   (search-backward (car search-ring)))
 196
 197 (defun nonincremental-repeat-re-search-forward ()
 198   "Search forward for the previous regular expression."
 199   (interactive)
 200   (if (null regexp-search-ring)
 201       (error "No previous search"))
 202   (re-search-forward (car regexp-search-ring)))
 203
 204 (defun nonincremental-repeat-re-search-backward ()
 205   "Search backward for the previous regular expression."
 206   (interactive)
 207   (if (null regexp-search-ring)
 208       (error "No previous search"))
 209   (re-search-backward (car regexp-search-ring)))
 210
 211 (define-key menu-bar-search-menu [query-replace-regexp]
 212   '("Query Replace Regexp..." . query-replace-regexp))
 213 (define-key menu-bar-search-menu [query-replace]
 214   '("Query Replace..." . query-replace))
 215 (define-key menu-bar-search-menu [find-tag]
 216   '("Find Tag..." . find-tag))
 217 (define-key menu-bar-search-menu [bookmark]
 218   '("Bookmarks" . menu-bar-bookmark-map))
 219
 220 (define-key menu-bar-search-menu [separator-search]
 221   '("--"))
 222
 223 (define-key menu-bar-search-menu [repeat-regexp-back]
 224   '("Repeat Regexp Backwards" . nonincremental-repeat-re-search-backward))
 225 (define-key menu-bar-search-menu [repeat-search-back]
 226   '("Repeat Backwards" . nonincremental-repeat-search-backward))
 227 (define-key menu-bar-search-menu [repeat-regexp-fwd]
 228   '("Repeat Regexp" . nonincremental-repeat-re-search-forward))
 229 (define-key menu-bar-search-menu [repeat-search-fwd]
 230   '("Repeat Search" . nonincremental-repeat-search-forward))
 231
 232 (define-key menu-bar-search-menu [separator-repeat]
 233   '("--"))
 234
 235 (define-key menu-bar-search-menu [re-search-backward]
 236   '("Regexp Search Backwards..." . nonincremental-re-search-backward))
 237 (define-key menu-bar-search-menu [search-backward]
 238   '("Search Backwards..." . nonincremental-search-backward))
 239 (define-key menu-bar-search-menu [re-search-forward]
 240   '("Regexp Search..." . nonincremental-re-search-forward))
 241 (define-key menu-bar-search-menu [search-forward]
 242   '("Search..." . nonincremental-search-forward))
 243 \f
 244 (if (fboundp 'start-process)
 245     (define-key menu-bar-edit-menu [spell] '("Spell" . ispell-menu-map)))
 246 (define-key menu-bar-edit-menu [fill] '("Fill" . fill-region))
 247 (define-key menu-bar-edit-menu [props] '("Text Properties" . facemenu-menu))
 248
 249 (define-key menu-bar-edit-menu [separator-edit]
 250   '("--"))
 251
 252 (define-key menu-bar-edit-menu [clear] '("Clear" . delete-region))
 253
 254 (define-key menu-bar-edit-menu [paste] '("Paste Most Recent" . yank))
 255
 256 (defvar yank-menu (cons "Select Yank" nil))
 257 (fset 'yank-menu (cons 'keymap yank-menu))
 258 (define-key menu-bar-edit-menu [select-paste] '("Select and Paste" . yank-menu))
 259 (define-key menu-bar-edit-menu [copy] '("Copy" . menu-bar-kill-ring-save))
 260 (define-key menu-bar-edit-menu [cut] '("Cut" . kill-region))
 261 (define-key menu-bar-edit-menu [undo] '("Undo" . undo))
 262
 263 (defun menu-bar-kill-ring-save (beg end)
 264   (interactive "r")
 265   (if (mouse-region-match)
 266       (message "Select a region with the mouse does `copy' automatically")
 267     (kill-ring-save beg end)))
 268
 269 (put 'fill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 270 (put 'kill-region 'menu-enable '(and mark-active (not buffer-read-only)))
 271 (put 'menu-bar-kill-ring-save 'menu-enable 'mark-active)
 272 (put 'yank 'menu-enable '(and (x-selection-exists-p) (not buffer-read-only)))
 273 (put 'yank-menu 'menu-enable '(and (cdr yank-menu) (not buffer-read-only)))
 274 (put 'delete-region 'menu-enable '(and mark-active
 275                                        (not buffer-read-only)
 276                                        (not (mouse-region-match))))
 277 (put 'undo 'menu-enable '(and (not buffer-read-only)
 278                               (if (eq last-command 'undo)
 279                                   pending-undo-list
 280                                 (consp buffer-undo-list))))
 281 (put 'query-replace 'menu-enable '(not buffer-read-only))
 282 (put 'query-replace-regexp 'menu-enable '(not buffer-read-only))
 283
 284 (autoload 'ispell-menu-map "ispell" nil t 'keymap)
 285
 286 ;; These are alternative definitions for the cut, paste and copy
 287 ;; menu items.  Use them if your system expects these to use the clipboard.
 288
 289 (put 'clipboard-kill-region 'menu-enable 'mark-active)
 290 (put 'clipboard-kill-ring-save 'menu-enable 'mark-active)
 291 (put 'clipboard-yank 'menu-enable
 292      '(or (x-selection-exists-p) (x-selection-exists-p 'CLIPBOARD)))
 293
 294 (defun clipboard-yank ()
 295   "Reinsert the last stretch of killed text, or the clipboard contents."
 296   (interactive)
 297   (let ((x-select-enable-clipboard t))
 298     (yank)))
 299
 300 (defun clipboard-kill-ring-save (beg end)
 301   "Copy region to kill ring, and save in the X clipboard."
 302   (interactive "r")
 303   (let ((x-select-enable-clipboard t))
 304     (kill-ring-save beg end)))
 305
 306 (defun clipboard-kill-region (beg end)
 307   "Kill the region, and save it in the X clipboard."
 308   (interactive "r")
 309   (let ((x-select-enable-clipboard t))
 310     (kill-region beg end)))
 311
 312 (defun menu-bar-enable-clipboard ()
 313   "Make CUT, PASTE and COPY (keys and menu bar items) use the clipboard.
 314 Do the same for the keys of the same name."
 315   (interactive)
 316   ;; We can't use constant list structure here because it becomes pure,
 317   ;; and because it gets modified with cache data.
 318   (define-key menu-bar-edit-menu [paste]
 319     (cons "Paste" 'clipboard-yank))
 320   (define-key menu-bar-edit-menu [copy]
 321     (cons "Copy" 'clipboard-kill-ring-save))
 322   (define-key menu-bar-edit-menu [cut]
 323     (cons "Cut" 'clipboard-kill-region))
 324
 325   (define-key global-map [f20] 'clipboard-kill-region)
 326   (define-key global-map [f16] 'clipboard-kill-ring-save)
 327   (define-key global-map [f18] 'clipboard-yank)
 328   ;; X11R6 versions
 329   (define-key global-map [cut] 'clipboard-kill-region)
 330   (define-key global-map [copy] 'clipboard-kill-ring-save)
 331   (define-key global-map [paste] 'clipboard-yank))
 332 \f
 333
 334 ;;; Menu support
 335
 336 (defvar menu-bar-custom-menu (make-sparse-keymap "Customize"))
 337
 338 (define-key menu-bar-custom-menu [customize-apropos-groups]
 339   '("Apropos Groups..." . customize-apropos-groups))
 340 (define-key menu-bar-custom-menu [customize-apropos-faces]
 341   '("Apropos Faces..." . customize-apropos-faces))
 342 (define-key menu-bar-custom-menu [customize-apropos-options]
 343   '("Apropos Options..." . customize-apropos-options))
 344 (define-key menu-bar-custom-menu [customize-apropos]
 345   '("Apropos..." . customize-apropos))
 346 (define-key menu-bar-custom-menu [separator-2]
 347   '("--"))
 348 (define-key menu-bar-custom-menu [customize-group]
 349   '("Specific Group..." . customize-group))
 350 (define-key menu-bar-custom-menu [customize-face]
 351   '("Specific Face..." . customize-face))
 352 (define-key menu-bar-custom-menu [customize-option]
 353   '("Specific Option..." . customize-option))
 354 (define-key menu-bar-custom-menu [separator-3]
 355   '("--"))
 356 (define-key menu-bar-custom-menu [customize-browse]
 357   '("Browse Customization Groups" . customize-browse))
 358 (define-key menu-bar-custom-menu [customize]
 359   '("Top-level Customization Group" . customize))
 360
 361 ;; Options menu
 362 (defvar menu-bar-options-menu (make-sparse-keymap "Global Options"))
 363
 364 (defmacro menu-bar-make-toggle (name variable doc message &rest body)
 365   `(progn
 366      (defun ,name ()
 367        ,(concat doc ".")
 368        (interactive)
 369        (if ,(if body `(progn . ,body)
 370               `(setq ,variable (not ,variable)))
 371            (message ,message "enabled")
 372          (message ,message "disabled")))
 373      '(,doc . ,name)))
 374
 375 (define-key menu-bar-options-menu [debug-on-quit]
 376   (menu-bar-make-toggle toggle-debug-on-quit debug-on-quit
 377                         "Toggle Debug on Quit" "Debug on Quit %s"))
 378 (define-key menu-bar-options-menu [debug-on-error]
 379   (menu-bar-make-toggle toggle-debug-on-error debug-on-error
 380                         "Toggle Debug on Error" "Debug on Error %s"))
 381 (define-key menu-bar-options-menu [options-separator]
 382   '("--"))
 383 (define-key menu-bar-options-menu [save-place]
 384   (menu-bar-make-toggle toggle-save-place-globally save-place
 385                         "Toggle Saving Place in Files between Sessions"
 386                         "Saving place in files %s"
 387                         (setq-default save-place (not (default-value save-place)))))
 388 (define-key menu-bar-options-menu [uniquify]
 389   (menu-bar-make-toggle toggle-uniquify-buffer-names uniquify-buffer-name-style
 390                         "Toggle Directory Names in Buffer Names"
 391                         "Directory name in buffer names (uniquify) %s"
 392                         (require 'uniquify)
 393                         (setq uniquify-buffer-name-style
 394                               (if (not uniquify-buffer-name-style)
 395                                   'forward))))
 396 (define-key menu-bar-options-menu [transient-mark-mode]
 397   (menu-bar-make-toggle toggle-transient-mark-mode transient-mark-mode
 398                         "Toggle Transient Mark Mode (highlights region)"
 399                         "Transient Mark mode %s"))
 400 (define-key menu-bar-options-menu [toggle-auto-compression]
 401   '("Toggle Automatic File De/compression" . auto-compression-mode))
 402 (define-key menu-bar-options-menu [auto-fill-mode]
 403   '("Toggle Auto Fill (word wrap) in Text modes"
 404     . toggle-text-mode-auto-fill))
 405 (define-key menu-bar-options-menu [toggle-global-lazy-font-lock-mode]
 406   (menu-bar-make-toggle toggle-global-lazy-font-lock-mode nil
 407                         "Toggle Global Font Lock (highlights syntax)"
 408                         "Global Font Lock mode %s"
 409                         ;; Make sure a support mode is used;
 410                         ;; otherwise Font Lock will be too slow.
 411                         (require 'font-lock)
 412                         (if (not global-font-lock-mode)
 413                             (or font-lock-support-mode
 414                                 (setq font-lock-support-mode 'lazy-lock-mode)))
 415                         (global-font-lock-mode)))
 416 \f
 417 (defvar menu-bar-describe-menu (make-sparse-keymap "Describe"))
 418
 419 (define-key menu-bar-describe-menu [describe-variable]
 420   '("Describe Variable..." . describe-variable))
 421 (define-key menu-bar-describe-menu [describe-function]
 422   '("Describe Function..." . describe-function))
 423 (define-key menu-bar-describe-menu [describe-key]
 424   '("Describe Key..." . describe-key))
 425 (define-key menu-bar-describe-menu [list-keybindings]
 426   '("List Key Bindings" . describe-bindings))
 427 (define-key menu-bar-describe-menu [apropos-variables]
 428   '("Apropos Variables..." . apropos-variable))
 429 (define-key menu-bar-describe-menu [apropos-commands]
 430   '("Apropos Commands..." . apropos-command))
 431 (define-key menu-bar-describe-menu [describe-mode]
 432   '("Describe Buffer Modes" . describe-mode))
 433
 434 (defvar menu-bar-manuals-menu (make-sparse-keymap "Manuals"))
 435
 436 (define-key menu-bar-manuals-menu [man]
 437   '("Read Man Page..." . manual-entry))
 438 (define-key menu-bar-manuals-menu [sep2]
 439   '("--"))
 440 (define-key menu-bar-manuals-menu [key]
 441   '("Find Key in Manual" . Info-goto-emacs-key-command-node))
 442 (define-key menu-bar-manuals-menu [command]
 443   '("Find Command in Manual" . Info-goto-emacs-command-node))
 444 (define-key menu-bar-manuals-menu [info]
 445   '("Browse Manuals with Info" . info))
 446 (define-key menu-bar-manuals-menu [sep1]
 447   '("--"))
 448 (define-key menu-bar-manuals-menu [emacs-faq]
 449   '("Emacs FAQ" . view-emacs-FAQ))
 450 (define-key menu-bar-manuals-menu [emacs-news]
 451   '("Emacs News" . view-emacs-news))
 452
 453 (define-key menu-bar-help-menu [emacs-version]
 454   '("Show Version" . emacs-version))
 455 (define-key menu-bar-help-menu [report-emacs-bug]
 456   '("Send Bug Report..." . report-emacs-bug))
 457 (define-key menu-bar-help-menu [sep2]
 458   '("--"))
 459 (define-key menu-bar-help-menu [finder-by-keyword]
 460   '("Find Emacs Packages..." . finder-by-keyword))
 461 (define-key menu-bar-help-menu [describe]
 462   (cons "Describe" menu-bar-describe-menu))
 463 (define-key menu-bar-help-menu [manuals]
 464   (cons "Manuals" menu-bar-manuals-menu))
 465 (define-key menu-bar-help-menu [emacs-tutorial]
 466   '("Emacs Tutorial" . help-with-tutorial))
 467 (define-key menu-bar-help-menu [sep1]
 468   '("--"))
 469 (define-key menu-bar-help-menu [options]
 470   (cons "Options" menu-bar-options-menu))
 471 (define-key menu-bar-help-menu [customize]
 472   (cons "Customize" menu-bar-custom-menu))
 473
 474 (defun kill-this-buffer ()      ; for the menubar
 475   "Kills the current buffer."
 476   (interactive)
 477   (kill-buffer (current-buffer)))
 478
 479 (defun kill-this-buffer-enabled-p ()
 480   (let ((count 0)
 481         (buffers (buffer-list)))
 482     (while buffers
 483       (or (string-match "^ " (buffer-name (car buffers)))
 484           (setq count (1+ count)))
 485       (setq buffers (cdr buffers)))
 486     (and (not (window-minibuffer-p (frame-selected-window menu-updating-frame)))
 487          (> count 1))))
 488
 489 (put 'kill-this-buffer 'menu-enable '(kill-this-buffer-enabled-p))
 490
 491 (put 'save-buffer 'menu-enable
 492      '(and (buffer-modified-p)
 493            (not (window-minibuffer-p (frame-selected-window menu-updating-frame)))))
 494
 495 (put 'write-file 'menu-enable
 496      '(not (window-minibuffer-p (frame-selected-window menu-updating-frame))))
 497
 498 (put 'find-file 'menu-enable
 499      '(not (window-minibuffer-p (frame-selected-window menu-updating-frame))))
 500
 501 (put 'dired 'menu-enable
 502      '(not (window-minibuffer-p (frame-selected-window menu-updating-frame))))
 503
 504 (put 'insert-file 'menu-enable
 505      '(not (window-minibuffer-p (frame-selected-window menu-updating-frame))))
 506
 507 (put 'revert-buffer 'menu-enable
 508      '(or revert-buffer-function revert-buffer-insert-file-contents-function
 509           (and (buffer-file-name)
 510                (or (buffer-modified-p)
 511                    (not (verify-visited-file-modtime (current-buffer)))))))
 512
 513 ;; Permit deleting frame if it would leave a visible or iconified frame.
 514 (put 'delete-frame 'menu-enable
 515      '(delete-frame-enabled-p))
 516
 517 (defun delete-frame-enabled-p ()
 518   "Return non-nil if `delete-frame' should be enabled in the menu bar."
 519   (let ((frames (frame-list))
 520         (count 0))
 521     (while frames
 522       (if (frame-visible-p (car frames))
 523           (setq count (1+ count)))
 524       (setq frames (cdr frames)))
 525     (> count 1)))
 526
 527 (put 'advertised-undo 'menu-enable
 528      '(and (not (eq t buffer-undo-list))
 529            (if (eq last-command 'undo)
 530                (and (boundp 'pending-undo-list)
 531                     pending-undo-list)
 532              buffer-undo-list)))
 533
 534 (defcustom yank-menu-length 20
 535   "*Maximum length to display in the yank-menu."
 536   :type 'integer
 537   :group 'mouse)
 538
 539 (defun menu-bar-update-yank-menu (string old)
 540   (let ((front (car (cdr yank-menu)))
 541         (menu-string (if (<= (length string) yank-menu-length)
 542                          string
 543                        (concat
 544                         (substring string 0 (/ yank-menu-length 2))
 545                         "..."
 546                         (substring string (- (/ yank-menu-length 2)))))))
 547     ;; Don't let the menu string be all dashes
 548     ;; because that has a special meaning in a menu.
 549     (if (string-match "\\`-+\\'" menu-string)
 550         (setq menu-string (concat menu-string " ")))
 551     ;; If we're supposed to be extending an existing string, and that
 552     ;; string really is at the front of the menu, then update it in place.
 553     (if (and old (or (eq old (car front))
 554                      (string= old (car front))))
 555         (progn
 556           (setcar front string)
 557           (setcar (cdr front) menu-string))
 558       (setcdr yank-menu
 559               (cons
 560                (cons string (cons menu-string 'menu-bar-select-yank))
 561                (cdr yank-menu)))))
 562   (if (> (length (cdr yank-menu)) kill-ring-max)
 563       (setcdr (nthcdr kill-ring-max yank-menu) nil)))
 564
 565 (put 'menu-bar-select-yank 'apropos-inhibit t)
 566 (defun menu-bar-select-yank ()
 567   (interactive "*")
 568   (push-mark (point))
 569   (insert last-command-event))
 570 \f
 571 ;; This definition is just to show what this looks like.
 572 ;; It gets overridden below when menu-bar-update-buffers is called.
 573 (define-key global-map [menu-bar buffer]
 574   (cons "Buffers" (make-sparse-keymap "Buffers")))
 575
 576 (defvar list-buffers-directory nil)
 577
 578 (defvar menu-bar-update-buffers-maxbuf)
 579
 580 (defun menu-bar-select-buffer ()
 581   (interactive)
 582   (switch-to-buffer last-command-event))
 583
 584 (defun menu-bar-select-frame ()
 585   (interactive)
 586   (make-frame-visible last-command-event)
 587   (raise-frame last-command-event)
 588   (select-frame last-command-event))
 589
 590 (defun menu-bar-update-buffers-1 (elt)
 591   (cons (format
 592          (format "%%%ds  %%s%%s  %%s" menu-bar-update-buffers-maxbuf)
 593          (cdr elt)
 594          (if (buffer-modified-p (car elt))
 595              "*" " ")
 596          (save-excursion
 597            (set-buffer (car elt))
 598            (if buffer-read-only "%" " "))
 599          (let ((file
 600                 (or (buffer-file-name (car elt))
 601                     (save-excursion
 602                       (set-buffer (car elt))
 603                       list-buffers-directory)
 604                     "")))
 605            (setq file (or (file-name-directory file)
 606                           ""))
 607            (if (> (length file) 20)
 608                (setq file (concat "..." (substring file -17))))
 609            file))
 610         (car elt)))
 611
 612 (defvar menu-bar-buffers-menu-list-buffers-entry nil)
 613
 614 (defun menu-bar-update-buffers ()
 615   ;; If user discards the Buffers item, play along.
 616   (and (lookup-key (current-global-map) [menu-bar buffer])
 617        (frame-or-buffer-changed-p)
 618        (let ((buffers (buffer-list))
 619              (frames (frame-list))
 620              (maxlen 0)
 621              buffers-menu frames-menu)
 622          ;; If requested, list only the N most recently selected buffers.
 623          (if (and (integerp buffers-menu-max-size)
 624                   (> buffers-menu-max-size 1))
 625              (if (> (length buffers) buffers-menu-max-size)
 626                  (setcdr (nthcdr buffers-menu-max-size buffers) nil)))
 627
 628          ;; Make the menu of buffers proper.
 629          (setq buffers-menu
 630                (cons "Select Buffer"
 631                      (let* ((buffer-list
 632                              (mapcar 'list buffers))
 633                             tail
 634                             (menu-bar-update-buffers-maxbuf 0)
 635                             alist
 636                             head)
 637                        ;; Put into each element of buffer-list
 638                        ;; the name for actual display,
 639                        ;; perhaps truncated in the middle.
 640                        (setq tail buffer-list)
 641                        (while tail
 642                          (let ((name (buffer-name (car (car tail)))))
 643                            (setcdr (car tail)
 644                                    (if (> (length name) 27)
 645                                        (concat (substring name 0 12)
 646                                                "..."
 647                                                (substring name -12))
 648                                      name)))
 649                          (setq tail (cdr tail)))
 650                        ;; Compute the maximum length of any name.
 651                        (setq tail buffer-list)
 652                        (while tail
 653                          (or (eq ?\ (aref (cdr (car tail)) 0))
 654                              (setq menu-bar-update-buffers-maxbuf
 655                                    (max menu-bar-update-buffers-maxbuf
 656                                         (length (cdr (car tail))))))
 657                          (setq tail (cdr tail)))
 658                        ;; Set ALIST to an alist of the form
 659                        ;; ITEM-STRING . BUFFER
 660                        (setq tail buffer-list)
 661                        (while tail
 662                          (let ((elt (car tail)))
 663                            (or (eq ?\ (aref (cdr elt) 0))
 664                                (setq alist (cons
 665                                             (menu-bar-update-buffers-1 elt)
 666                                             alist)))
 667                            (and alist (> (length (car (car alist))) maxlen)
 668                                 (setq maxlen (length (car (car alist))))))
 669                          (setq tail (cdr tail)))
 670                        (setq alist (nreverse alist))
 671                        ;; Make the menu item for list-buffers
 672                        ;; or reuse the one we already have.
 673                        ;; The advantage in reusing one
 674                        ;; is that it already has the keyboard equivalent
 675                        ;; cached, so we save the time to look that up again.
 676                        (or menu-bar-buffers-menu-list-buffers-entry
 677                            (setq menu-bar-buffers-menu-list-buffers-entry
 678                                  (cons
 679                                   'list-buffers
 680                                   (cons
 681                                    ""
 682                                    'list-buffers))))
 683                        ;; Update the item string for menu's new width.
 684                        (setcar (cdr menu-bar-buffers-menu-list-buffers-entry)
 685                                (concat (make-string (max (- (/ maxlen 2) 8) 0)
 686                                                     ?\ )
 687                                        "List All Buffers"))
 688                        ;; Now make the actual list of items,
 689                        ;; ending with the list-buffers item.
 690                        (nconc (mapcar '(lambda (pair)
 691                                          ;; This is somewhat risque, to use
 692                                          ;; the buffer name itself as the event
 693                                          ;; type to define, but it works.
 694                                          ;; It would not work to use the buffer
 695                                          ;; since a buffer as an event has its
 696                                          ;; own meaning.
 697                                          (nconc (list (buffer-name (cdr pair))
 698                                                       (car pair)
 699                                                       (cons nil nil))
 700                                                 'menu-bar-select-buffer))
 701                                       alist)
 702                               (list menu-bar-buffers-menu-list-buffers-entry)))))
 703
 704
 705          ;; Make a Frames menu if we have more than one frame.
 706          (if (cdr frames)
 707              (let ((name (concat (make-string (max (- (/ maxlen 2) 3) 0)
 708                                               ?\ )
 709                                  "Frames"))
 710                    (frames-menu
 711                     (cons 'keymap
 712                           (cons "Select Frame"
 713                                 (mapcar '(lambda (frame)
 714                                            (nconc (list frame
 715                                                         (cdr (assq 'name
 716                                                                    (frame-parameters frame)))
 717                                                         (cons nil nil))
 718                                                   'menu-bar-select-frame))
 719                                         frames)))))
 720                ;; Put it underneath the Buffers menu.
 721                (setq buffers-menu (cons (cons 'frames (cons name frames-menu))
 722                                         buffers-menu))))
 723          (if buffers-menu
 724              (setq buffers-menu (cons 'keymap buffers-menu)))
 725          (define-key (current-global-map) [menu-bar buffer]
 726            (cons "Buffers" buffers-menu)))))
 727
 728 (add-hook 'menu-bar-update-hook 'menu-bar-update-buffers)
 729
 730 (menu-bar-update-buffers)
 731
 732 ;; this version is too slow
 733 ;;;(defun format-buffers-menu-line (buffer)
 734 ;;;  "Returns a string to represent the given buffer in the Buffer menu.
 735 ;;;nil means the buffer shouldn't be listed.  You can redefine this."
 736 ;;;  (if (string-match "\\` " (buffer-name buffer))
 737 ;;;      nil
 738 ;;;    (save-excursion
 739 ;;;     (set-buffer buffer)
 740 ;;;     (let ((size (buffer-size)))
 741 ;;;       (format "%s%s %-19s %6s %-15s %s"
 742 ;;;            (if (buffer-modified-p) "*" " ")
 743 ;;;            (if buffer-read-only "%" " ")
 744 ;;;            (buffer-name)
 745 ;;;            size
 746 ;;;            mode-name
 747 ;;;            (or (buffer-file-name) ""))))))
 748 \f
 749 ;;; Set up a menu bar menu for the minibuffer.
 750
 751 (mapcar
 752  (function
 753   (lambda (map)
 754     (define-key map [menu-bar minibuf]
 755       (cons "Minibuf" (make-sparse-keymap "Minibuf")))))
 756  (list minibuffer-local-ns-map
 757        minibuffer-local-must-match-map
 758        minibuffer-local-isearch-map
 759        minibuffer-local-map
 760        minibuffer-local-completion-map))
 761
 762 (mapcar
 763  (function
 764   (lambda (map)
 765     (define-key map [menu-bar minibuf ?\?]
 766       '("List Completions" . minibuffer-completion-help))
 767     (define-key map [menu-bar minibuf space]
 768       '("Complete Word" . minibuffer-complete-word))
 769     (define-key map [menu-bar minibuf tab]
 770       '("Complete" . minibuffer-complete))
 771     ))
 772  (list minibuffer-local-must-match-map
 773        minibuffer-local-completion-map))
 774
 775 (mapcar
 776  (function
 777   (lambda (map)
 778     (define-key map [menu-bar minibuf quit]
 779       '("Quit" . keyboard-escape-quit))
 780     (define-key map [menu-bar minibuf return]
 781       '("Enter" . exit-minibuffer))
 782     ))
 783  (list minibuffer-local-ns-map
 784        minibuffer-local-must-match-map
 785        minibuffer-local-isearch-map
 786        minibuffer-local-map
 787        minibuffer-local-completion-map))
 788 \f
 789 (defvar menu-bar-mode nil)
 790
 791 (defun menu-bar-mode (flag)
 792   "Toggle display of a menu bar on each frame.
 793 This command applies to all frames that exist and frames to be
 794 created in the future.
 795 With a numeric argument, if the argument is negative,
 796 turn off menu bars; otherwise, turn on menu bars."
 797  (interactive "P")
 798
 799   ;; Make menu-bar-mode and default-frame-alist consistent.
 800   (let ((default (assq 'menu-bar-lines default-frame-alist)))
 801     (if default
 802         (setq menu-bar-mode (not (eq (cdr default) 0)))
 803       (setq default-frame-alist
 804             (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 805                   default-frame-alist))))
 806
 807   ;; Toggle or set the mode, according to FLAG.
 808  (setq menu-bar-mode (if (null flag) (not menu-bar-mode)
 809                        (> (prefix-numeric-value flag) 0)))
 810
 811  ;; Apply it to default-frame-alist.
 812  (let ((parameter (assq 'menu-bar-lines default-frame-alist)))
 813    (if (consp parameter)
 814        (setcdr parameter (if menu-bar-mode 1 0))
 815      (setq default-frame-alist
 816            (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 817                  default-frame-alist))))
 818
 819  ;; Apply it to existing frames.
 820  (let ((frames (frame-list)))
 821    (while frames
 822      (let ((height (cdr (assq 'height (frame-parameters (car frames))))))
 823        (modify-frame-parameters (car frames)
 824                                 (list (cons 'menu-bar-lines
 825                                           (if menu-bar-mode 1 0))))
 826        (modify-frame-parameters (car frames)
 827                                 (list (cons 'height height))))
 828      (setq frames (cdr frames)))))
 829
 830 (provide 'menu-bar)
 831
 832 ;;; menu-bar.el ends here