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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 [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)))
(rotate-yank-pointer (x-popup-menu event
(list "Yank Menu"
(cons "Pick Selection" menu))))
(if (interactive-p)
(message "The next yank will insert the selected text.")
(current-kill 0))))
(define-key menu-bar-edit-menu [choose-selection]
'("Choose Pasting Selection" . mouse-menu-choose-yank))
(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)
(maxlen 0)
head)
(while tail
(let ((elt (car tail)))
(if (not (string-match "^ "
(buffer-name elt)))
(setq head (cons
(cons
(format
"%14s %s"
(buffer-name elt)
(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
|
