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- ;;; menu-bar.el --- define a default menu bar.
-
- ;; Author: RMS
- ;; Keywords: internals
-
- ;; Copyright (C) 1993 Free Software Foundation, Inc.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- ;;; Code:
-
- (define-key global-map [menu-bar] (make-sparse-keymap "menu-bar"))
- (defvar menu-bar-help-menu (make-sparse-keymap "Help"))
- (define-key global-map [menu-bar help] (cons "Help" menu-bar-help-menu))
- (defvar menu-bar-edit-menu (make-sparse-keymap "Edit"))
- (define-key global-map [menu-bar edit] (cons "Edit" menu-bar-edit-menu))
- (defvar menu-bar-file-menu (make-sparse-keymap "File"))
- (define-key global-map [menu-bar file] (cons "File" menu-bar-file-menu))
-
- (define-key menu-bar-file-menu [exit-emacs]
- '("Exit Emacs" . save-buffers-kill-emacs))
- (define-key menu-bar-file-menu [kill-buffer]
- '("Kill Buffer" . kill-this-buffer))
- (define-key menu-bar-file-menu [delete-frame] '("Delete Frame" . delete-frame))
- (define-key menu-bar-file-menu [print-buffer] '("Print Buffer" . print-buffer))
- (define-key menu-bar-file-menu [revert-buffer]
- '("Revert Buffer" . revert-buffer))
- (define-key menu-bar-file-menu [write-file]
- '("Save Buffer As..." . write-file))
- (define-key menu-bar-file-menu [save-buffer] '("Save Buffer" . save-buffer))
- (define-key menu-bar-file-menu [open-file] '("Open File..." . find-file))
- (define-key menu-bar-file-menu [new-frame] '("New Frame" . new-frame))
-
- (define-key menu-bar-edit-menu [fill] '("Fill" . fill-region))
- (define-key menu-bar-edit-menu [clear] '("Clear" . delete-region))
- (define-key menu-bar-edit-menu [choose-selection]
- '("Choose Next Paste" . mouse-menu-choose-yank))
- (define-key menu-bar-edit-menu [paste] '("Paste" . yank))
- (define-key menu-bar-edit-menu [copy] '("Copy" . kill-ring-save))
- (define-key menu-bar-edit-menu [cut] '("Cut" . kill-region))
- (define-key menu-bar-edit-menu [undo] '("Undo" . undo))
-
- (put 'fill-region 'menu-enable 'mark-active)
- (put 'kill-region 'menu-enable 'mark-active)
- (put 'kill-ring-save 'menu-enable 'mark-active)
- (put 'yank 'menu-enable '(x-selection-exists-p))
- (put 'delete-region 'menu-enable 'mark-active)
- (put 'undo 'menu-enable '(if (eq last-command 'undo)
- pending-undo-list
- (consp buffer-undo-list)))
-
- (define-key menu-bar-help-menu [emacs-tutorial]
- '("Emacs Tutorial" . help-with-tutorial))
- (define-key menu-bar-help-menu [man] '("Man..." . manual-entry))
- (define-key menu-bar-help-menu [describe-variable]
- '("Describe Variable..." . describe-variable))
- (define-key menu-bar-help-menu [describe-function]
- '("Describe Function..." . describe-function))
- (define-key menu-bar-help-menu [describe-key]
- '("Describe Key..." . describe-key))
- (define-key menu-bar-help-menu [list-keybindings]
- '("List Keybindings" . describe-bindings))
- (define-key menu-bar-help-menu [command-apropos]
- '("Command Apropos..." . command-apropos))
- (define-key menu-bar-help-menu [describe-mode]
- '("Describe Mode" . describe-mode))
- (define-key menu-bar-help-menu [info] '("Info" . info))
-
- (define-key menu-bar-help-menu [emacs-news] '("Emacs News" . view-emacs-news))
- (defun kill-this-buffer () ; for the menubar
- "Kills the current buffer."
- (interactive)
- (kill-buffer (current-buffer)))
-
- (defun kill-this-buffer-enabled-p ()
- (let ((count 0)
- (buffers (buffer-list)))
- (while buffers
- (or (string-match "^ " (buffer-name (car buffers)))
- (setq count (1+ count)))
- (setq buffers (cdr buffers)))
- (> count 1)))
-
- (put 'save-buffer 'menu-enable '(buffer-modified-p))
- (put 'revert-buffer 'menu-enable '(and (buffer-modified-p) (buffer-file-name)))
- (put 'delete-frame 'menu-enable '(cdr (visible-frame-list)))
- (put 'kill-this-buffer 'menu-enable '(kill-this-buffer-enabled-p))
-
- (put 'advertised-undo 'menu-enable
- '(and (not (eq t buffer-undo-list))
- (if (eq last-command 'undo)
- (and (boundp 'pending-undo-list)
- pending-undo-list)
- buffer-undo-list)))
-
- (defvar yank-menu-length 100
- "*Maximum length of an item in the menu for \
- \\[mouse-menu-choose-yank].")
-
- (defun mouse-menu-choose-yank (event)
- "Pop up a menu of the kill-ring for selection with the mouse.
- The kill-ring-yank-pointer is moved to the selected element.
- A subsequent \\[yank] yanks the choice just selected."
- (interactive "e")
- (let* ((count 0)
- (menu (mapcar (lambda (string)
- (if (> (length string) yank-menu-length)
- (setq string (substring string
- 0 yank-menu-length)))
- (prog1 (cons string count)
- (setq count (1+ count))))
- kill-ring))
- (arg (x-popup-menu event
- (list "Yank Menu"
- (cons "Pick Selection" menu)))))
- ;; A mouse click outside the menu returns nil.
- ;; Avoid a confusing error from passing nil to rotate-yank-pointer.
- ;; XXX should this perhaps do something other than simply return? -rm
- (if arg
- (progn
- (rotate-yank-pointer arg)
- (if (interactive-p)
- (message "The next yank will insert the selected text.")
- (current-kill 0))))))
- (put 'mouse-menu-choose-yank 'menu-enable 'kill-ring)
-
- (define-key global-map [menu-bar buffer] '("Buffers" . mouse-menu-bar-buffers))
-
- (defvar complex-buffers-menu-p nil
- "*Non-nil says, offer a choice of actions after you pick a buffer.
- This applies to the Buffers menu from the menu bar.")
-
- (defvar buffers-menu-max-size 10
- "*Maximum number of entries which may appear on the Buffers menu.
- If this is 10, then only the ten most-recently-selected buffers are shown.
- If this is nil, then all buffers are shown.
- A large number or nil slows down menu responsiveness.")
-
- (defun mouse-menu-bar-buffers (event)
- "Pop up a menu of buffers for selection with the mouse.
- This switches buffers in the window that you clicked on,
- and selects that window."
- (interactive "e")
- (let ((buffers (buffer-list))
- menu)
- ;; If requested, list only the N most recently selected buffers.
- (if (and (integerp buffers-menu-max-size)
- (> buffers-menu-max-size 1))
- (if (> (length buffers) buffers-menu-max-size)
- (setcdr (nthcdr buffers-menu-max-size buffers) nil)))
- (setq menu
- (list "Buffer Menu"
- (cons "Select Buffer"
- (let ((tail buffers)
- (maxbuf 0)
- (maxlen 0)
- head)
- (while tail
- (or (eq ?\ (aref (buffer-name (car tail)) 0))
- (setq maxbuf
- (max maxbuf
- (length (buffer-name (car tail))))))
- (setq tail (cdr tail)))
- (setq tail buffers)
- (while tail
- (let ((elt (car tail)))
- (if (not (string-match "^ "
- (buffer-name elt)))
- (setq head (cons
- (cons
- (format
- (format "%%%ds %%s%%s %%s"
- maxbuf)
- (buffer-name elt)
- (if (buffer-modified-p elt) "*" " ")
- (save-excursion
- (set-buffer elt)
- (if buffer-read-only "%" " "))
- (or (buffer-file-name elt) ""))
- elt)
- head)))
- (and head (> (length (car (car head))) maxlen)
- (setq maxlen (length (car (car head))))))
- (setq tail (cdr tail)))
- (nconc (reverse head)
- (list (cons (concat (make-string (- (/ maxlen 2) 8) ?\ )
- "List All Buffers")
- 'list-buffers)))))))
-
-
- (let ((buf (x-popup-menu (if (listp event) event
- (cons '(0 0) (selected-frame)))
- menu))
- (window (and (listp event) (posn-window (event-start event)))))
- (if (eq buf 'list-buffers)
- (list-buffers)
- (if buf
- (if complex-buffers-menu-p
- (let ((action (x-popup-menu (if (listp event) event
- (cons '(0 0) (selected-frame)))
- '("Buffer Action"
- (""
- ("Save Buffer" . save-buffer)
- ("Kill Buffer" . kill-buffer)
- ("Select Buffer" . switch-to-buffer))))))
- (if (eq action 'save-buffer)
- (save-excursion
- (set-buffer buf)
- (save-buffer))
- (funcall action buf)))
- (and (windowp window)
- (select-window window))
- (switch-to-buffer buf)))))))
-
- ;; this version is too slow
- ;;;(defun format-buffers-menu-line (buffer)
- ;;; "Returns a string to represent the given buffer in the Buffer menu.
- ;;;nil means the buffer shouldn't be listed. You can redefine this."
- ;;; (if (string-match "\\` " (buffer-name buffer))
- ;;; nil
- ;;; (save-excursion
- ;;; (set-buffer buffer)
- ;;; (let ((size (buffer-size)))
- ;;; (format "%s%s %-19s %6s %-15s %s"
- ;;; (if (buffer-modified-p) "*" " ")
- ;;; (if buffer-read-only "%" " ")
- ;;; (buffer-name)
- ;;; size
- ;;; mode-name
- ;;; (or (buffer-file-name) ""))))))
-
- (defvar menu-bar-mode nil)
-
- (defun menu-bar-mode (flag)
- "Toggle display of a menu bar on each frame.
- This command applies to all frames that exist and frames to be
- created in the future.
- With a numeric argument, if the argument is negative,
- turn off menu bars; otherwise, turn on menu bars."
- (interactive "P")
- (setq menu-bar-mode (if (null flag) (not menu-bar-mode)
- (or (not (numberp flag)) (>= flag 0))))
- (let ((parameter (assq 'menu-bar-lines default-frame-alist)))
- (if (consp parameter)
- (setcdr parameter (if menu-bar-mode 1 0))
- (setq default-frame-alist
- (cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
- default-frame-alist))))
- (let ((frames (frame-list)))
- (while frames
- ;; Turn menu bar on or off in existing frames.
- ;; (Except for minibuffer-only frames.)
- (or (eq 'only (cdr (assq 'minibuffer (frame-parameters (car frames)))))
- (modify-frame-parameters
- (car frames)
- (list (if menu-bar-mode
- '(menu-bar-lines . 1)
- '(menu-bar-lines . 0)))))
- (setq frames (cdr frames)))))
-
- ;; Make frames created from now on have a menu bar.
- (if window-system
- (menu-bar-mode t))
-
- (provide 'menu-bar)
-
- ;;; menu-bar.el ends here
-