code.delx.au - gnu-emacs/blob - lisp/menu-bar.el

   1 ;;; menu-bar.el --- define a default menu bar.
   2
   3 ;; Author: RMS
   4 ;; Keywords: internals
   5
   6 ;; Copyright (C) 1993 Free Software Foundation, Inc.
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 ;;; Code:
  25
  26 (define-key global-map [menu-bar] (make-sparse-keymap "menu-bar"))
  27 (defvar menu-bar-help-menu (make-sparse-keymap "Help"))
  28 ;; Put Help item last.
  29 (setq menu-bar-final-items '(help))
  30 (define-key global-map [menu-bar help] (cons "Help" menu-bar-help-menu))
  31 (defvar menu-bar-edit-menu (make-sparse-keymap "Edit"))
  32 (define-key global-map [menu-bar edit] (cons "Edit" menu-bar-edit-menu))
  33 (defvar menu-bar-file-menu (make-sparse-keymap "File"))
  34 (define-key global-map [menu-bar file] (cons "File" menu-bar-file-menu))
  35
  36 (define-key menu-bar-file-menu [exit-emacs]
  37   '("Exit Emacs" . save-buffers-kill-emacs))
  38 (define-key menu-bar-file-menu [kill-buffer]
  39   '("Kill Buffer" . kill-this-buffer))
  40 (define-key menu-bar-file-menu [delete-frame] '("Delete Frame" . delete-frame))
  41 (define-key menu-bar-file-menu [print-buffer] '("Print Buffer" . print-buffer))
  42 (define-key menu-bar-file-menu [revert-buffer]
  43   '("Revert Buffer" . revert-buffer))
  44 (define-key menu-bar-file-menu [write-file]
  45   '("Save Buffer As..." . write-file))
  46 (define-key menu-bar-file-menu [save-buffer] '("Save Buffer" . save-buffer))
  47 (define-key menu-bar-file-menu [dired] '("Open Directory..." . dired))
  48 (define-key menu-bar-file-menu [open-file] '("Open File..." . find-file))
  49 (define-key menu-bar-file-menu [new-frame] '("New Frame" . new-frame))
  50
  51
  52 (define-key menu-bar-edit-menu [spell] '("Spell..." . ispell-menu-map))
  53 (define-key menu-bar-edit-menu [fill] '("Fill" . fill-region))
  54 (define-key menu-bar-edit-menu [clear] '("Clear" . delete-region))
  55 (define-key menu-bar-edit-menu [choose-next-paste]
  56   '("Choose Next Paste" . mouse-menu-choose-yank))
  57 (define-key menu-bar-edit-menu [paste] '("Paste" . yank))
  58 (define-key menu-bar-edit-menu [copy] '("Copy" . kill-ring-save))
  59 (define-key menu-bar-edit-menu [cut] '("Cut" . kill-region))
  60 (define-key menu-bar-edit-menu [undo] '("Undo" . undo))
  61
  62 (put 'fill-region 'menu-enable 'mark-active)
  63 (put 'kill-region 'menu-enable 'mark-active)
  64 (put 'kill-ring-save 'menu-enable 'mark-active)
  65 (put 'yank 'menu-enable '(x-selection-exists-p))
  66 (put 'delete-region 'menu-enable 'mark-active)
  67 (put 'undo 'menu-enable '(if (eq last-command 'undo)
  68                              pending-undo-list
  69                            (consp buffer-undo-list)))
  70
  71 (autoload 'ispell-menu-map "ispell" nil t 'keymap)
  72
  73 (define-key menu-bar-help-menu [emacs-tutorial]
  74   '("Emacs Tutorial" . help-with-tutorial))
  75 (define-key menu-bar-help-menu [man] '("Man..." . manual-entry))
  76 (define-key menu-bar-help-menu [describe-variable]
  77   '("Describe Variable..." . describe-variable))
  78 (define-key menu-bar-help-menu [describe-function]
  79   '("Describe Function..." . describe-function))
  80 (define-key menu-bar-help-menu [describe-key]
  81   '("Describe Key..." . describe-key))
  82 (define-key menu-bar-help-menu [list-keybindings]
  83   '("List Keybindings" . describe-bindings))
  84 (define-key menu-bar-help-menu [command-apropos]
  85   '("Command Apropos..." . command-apropos))
  86 (define-key menu-bar-help-menu [describe-mode]
  87   '("Describe Mode" . describe-mode))
  88 (define-key menu-bar-help-menu [info] '("Info" . info))
  89
  90 (define-key menu-bar-help-menu [emacs-news] '("Emacs News" . view-emacs-news))
  91 (defun kill-this-buffer ()      ; for the menubar
  92   "Kills the current buffer."
  93   (interactive)
  94   (kill-buffer (current-buffer)))
  95
  96 (defun kill-this-buffer-enabled-p ()
  97   (let ((count 0)
  98         (buffers (buffer-list)))
  99     (while buffers
 100       (or (string-match "^ " (buffer-name (car buffers)))
 101           (setq count (1+ count)))
 102       (setq buffers (cdr buffers)))
 103     (> count 1)))
 104
 105 (put 'save-buffer 'menu-enable '(buffer-modified-p))
 106 (put 'revert-buffer 'menu-enable
 107      '(or revert-buffer-function revert-buffer-insert-file-contents-function
 108           (and (buffer-file-name)
 109                (not (verify-visited-file-modtime (current-buffer))))))
 110 (put 'delete-frame 'menu-enable '(cdr (visible-frame-list)))
 111 (put 'kill-this-buffer 'menu-enable '(kill-this-buffer-enabled-p))
 112
 113 (put 'advertised-undo 'menu-enable
 114      '(and (not (eq t buffer-undo-list))
 115            (if (eq last-command 'undo)
 116                (and (boundp 'pending-undo-list)
 117                     pending-undo-list)
 118              buffer-undo-list)))
 119
 120 (defvar yank-menu-length 100
 121   "*Maximum length of an item in the menu for \
 122 \\[mouse-menu-choose-yank].")
 123
 124 (defun mouse-menu-choose-yank (event)
 125   "Pop up a menu of the kill-ring for selection with the mouse.
 126 The kill-ring-yank-pointer is moved to the selected element.
 127 A subsequent \\[yank] yanks the choice just selected."
 128   (interactive "e")
 129   (let* ((count 0)
 130          (menu (mapcar (lambda (string)
 131                          (if (> (length string) yank-menu-length)
 132                              (setq string (substring string
 133                                                      0 yank-menu-length)))
 134                          (prog1 (cons string count)
 135                            (setq count (1+ count))))
 136                        kill-ring))
 137          (arg (x-popup-menu event
 138                             (list "Yank Menu"
 139                                   (cons "Choose Next Yank" menu)))))
 140     ;; A mouse click outside the menu returns nil.
 141     ;; Avoid a confusing error from passing nil to rotate-yank-pointer.
 142     ;; XXX should this perhaps do something other than simply return? -rm
 143     (if arg
 144         (progn
 145           (rotate-yank-pointer arg)
 146           (if (interactive-p)
 147               (message "The next yank will insert the selected text.")
 148             (current-kill 0))))))
 149 (put 'mouse-menu-choose-yank 'menu-enable 'kill-ring)
 150 \f
 151 (define-key global-map [menu-bar buffer] '("Buffers" . mouse-menu-bar-buffers))
 152
 153 (defvar complex-buffers-menu-p nil
 154   "*Non-nil says, offer a choice of actions after you pick a buffer.
 155 This applies to the Buffers menu from the menu bar.")
 156
 157 (defvar buffers-menu-max-size 10
 158   "*Maximum number of entries which may appear on the Buffers menu.
 159 If this is 10, then only the ten most-recently-selected buffers are shown.
 160 If this is nil, then all buffers are shown.
 161 A large number or nil slows down menu responsiveness.")
 162
 163 (defun mouse-menu-bar-buffers (event)
 164   "Pop up a menu of buffers for selection with the mouse.
 165 This switches buffers in the window that you clicked on,
 166 and selects that window."
 167   (interactive "e")
 168   (let ((buffers (buffer-list))
 169         menu)
 170     ;; If requested, list only the N most recently selected buffers.
 171     (if (and (integerp buffers-menu-max-size)
 172              (> buffers-menu-max-size 1))
 173         (if (> (length buffers) buffers-menu-max-size)
 174             (setcdr (nthcdr buffers-menu-max-size buffers) nil)))
 175     (setq menu
 176           (cons "Select Buffer"
 177                 (let ((tail buffers)
 178                       (maxbuf 0)
 179                       (maxlen 0)
 180                       head)
 181                   (while tail
 182                     (or (eq ?\ (aref (buffer-name (car tail)) 0))
 183                         (setq maxbuf
 184                               (max maxbuf
 185                                    (length (buffer-name (car tail))))))
 186                     (setq tail (cdr tail)))
 187                   (setq tail buffers)
 188                   (while tail
 189                     (let ((elt (car tail)))
 190                       (if (not (string-match "^ "
 191                                              (buffer-name elt)))
 192                           (setq head (cons
 193                                       (cons
 194                                        (format
 195                                         (format "%%%ds  %%s%%s  %%s"
 196                                                 maxbuf)
 197                                         (buffer-name elt)
 198                                         (if (buffer-modified-p elt)
 199                                             "*" " ")
 200                                         (save-excursion
 201                                           (set-buffer elt)
 202                                           (if buffer-read-only "%" " "))
 203                                         (or (buffer-file-name elt) ""))
 204                                        elt)
 205                                       head)))
 206                       (and head (> (length (car (car head))) maxlen)
 207                            (setq maxlen (length (car (car head))))))
 208                     (setq tail (cdr tail)))
 209                   (nconc (nreverse head)
 210                          (list (cons
 211                                 (concat (make-string (max (- (/ maxlen
 212                                                                 2)
 213                                                              8)
 214                                                           0) ?\ )
 215                                         "List All Buffers")
 216                                 'list-buffers))))))
 217     (setq menu (list menu))
 218
 219     (if (cdr (frame-list))
 220         (setq menu
 221               (cons (cons "Select Frame"
 222                           (mapcar (lambda (frame)
 223                                     (cons (cdr (assq 'name
 224                                                      (frame-parameters frame)))
 225                                           frame))
 226                                   (frame-list)))
 227                     menu)))
 228     (setq menu (cons "Buffer and Frame Menu" menu))
 229
 230     (let ((buf (x-popup-menu (if (listp event) event
 231                                (cons '(0 0) (selected-frame)))
 232                              menu))
 233           (window (and (listp event) (posn-window (event-start event)))))
 234       (cond ((framep buf)
 235              (make-frame-visible buf)
 236              (raise-frame buf)
 237              (select-frame buf))
 238             ((eq buf 'list-buffers)
 239              (list-buffers))
 240             (buf
 241              (if complex-buffers-menu-p
 242                  (let ((action (x-popup-menu
 243                                 (if (listp event) event
 244                                   (cons '(0 0) (selected-frame)))
 245                                 '("Buffer Action"
 246                                   (""
 247                                    ("Save Buffer" . save-buffer)
 248                                    ("Kill Buffer" . kill-buffer)
 249                                    ("Select Buffer" . switch-to-buffer))))))
 250                    (if (eq action 'save-buffer)
 251                        (save-excursion
 252                          (set-buffer buf)
 253                          (save-buffer))
 254                      (funcall action buf)))
 255                (and (windowp window)
 256                     (select-window window))
 257                (switch-to-buffer buf)))))))
 258
 259 ;; this version is too slow
 260 ;;;(defun format-buffers-menu-line (buffer)
 261 ;;;  "Returns a string to represent the given buffer in the Buffer menu.
 262 ;;;nil means the buffer shouldn't be listed.  You can redefine this."
 263 ;;;  (if (string-match "\\` " (buffer-name buffer))
 264 ;;;      nil
 265 ;;;    (save-excursion
 266 ;;;     (set-buffer buffer)
 267 ;;;     (let ((size (buffer-size)))
 268 ;;;       (format "%s%s %-19s %6s %-15s %s"
 269 ;;;            (if (buffer-modified-p) "*" " ")
 270 ;;;            (if buffer-read-only "%" " ")
 271 ;;;            (buffer-name)
 272 ;;;            size
 273 ;;;            mode-name
 274 ;;;            (or (buffer-file-name) ""))))))
 275 \f
 276 (defvar menu-bar-mode nil)
 277
 278 (defun menu-bar-mode (flag)
 279   "Toggle display of a menu bar on each frame.
 280 This command applies to all frames that exist and frames to be
 281 created in the future.
 282 With a numeric argument, if the argument is negative,
 283 turn off menu bars; otherwise, turn on menu bars."
 284   (interactive "P")
 285   (setq menu-bar-mode (if (null flag) (not menu-bar-mode)
 286                           (or (not (numberp flag)) (>= flag 0))))
 287   (let ((parameter (assq 'menu-bar-lines default-frame-alist)))
 288     (if (consp parameter)
 289         (setcdr parameter (if menu-bar-mode 1 0))
 290       (setq default-frame-alist
 291             (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
 292                   default-frame-alist))))
 293   (let ((frames (frame-list)))
 294     (while frames
 295       ;; Turn menu bar on or off in existing frames.
 296       ;; (Except for minibuffer-only frames.)
 297       (or (eq 'only (cdr (assq 'minibuffer (frame-parameters (car frames)))))
 298           (modify-frame-parameters
 299            (car frames)
 300            (list (if menu-bar-mode
 301                      '(menu-bar-lines . 1)
 302                    '(menu-bar-lines . 0)))))
 303       (setq frames (cdr frames)))))
 304
 305 ;; Make frames created from now on have a menu bar.
 306 (if window-system
 307     (menu-bar-mode t))
 308
 309 (provide 'menu-bar)
 310
 311 ;;; menu-bar.el ends here