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352 lines
12 KiB
EmacsLisp
352 lines
12 KiB
EmacsLisp
;;; menu-bar.el --- define a default menu bar.
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;; Author: RMS
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;; Keywords: internal
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;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Code:
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;; Don't clobber an existing menu-bar keymap, to preserve any menu-bar key
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;; definitions made in loaddefs.el.
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(or (lookup-key global-map [menu-bar])
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(define-key global-map [menu-bar] (make-sparse-keymap "menu-bar")))
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(defvar menu-bar-help-menu (make-sparse-keymap "Help"))
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;; Put Help item last.
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(setq menu-bar-final-items '(help))
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(define-key global-map [menu-bar help] (cons "Help" menu-bar-help-menu))
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(defvar menu-bar-edit-menu (make-sparse-keymap "Edit"))
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(define-key global-map [menu-bar edit] (cons "Edit" menu-bar-edit-menu))
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(defvar menu-bar-file-menu (make-sparse-keymap "File"))
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(define-key global-map [menu-bar file] (cons "File" menu-bar-file-menu))
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(define-key menu-bar-file-menu [exit-emacs]
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'("Exit Emacs" . save-buffers-kill-emacs))
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(define-key menu-bar-file-menu [kill-buffer]
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'("Kill Buffer" . kill-this-buffer))
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(define-key menu-bar-file-menu [delete-frame] '("Delete Frame" . delete-frame))
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(define-key menu-bar-file-menu [bookmark]
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'("Bookmarks..." . menu-bar-bookmark-map))
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(define-key menu-bar-file-menu [print-buffer] '("Print Buffer" . print-buffer))
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(define-key menu-bar-file-menu [revert-buffer]
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'("Revert Buffer" . revert-buffer))
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(define-key menu-bar-file-menu [write-file]
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'("Save Buffer As..." . write-file))
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(define-key menu-bar-file-menu [save-buffer] '("Save Buffer" . save-buffer))
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(define-key menu-bar-file-menu [dired] '("Open Directory..." . dired))
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(define-key menu-bar-file-menu [open-file] '("Open File..." . find-file))
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(define-key menu-bar-file-menu [new-frame] '("New Frame" . new-frame))
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(define-key menu-bar-edit-menu [spell] '("Spell..." . ispell-menu-map))
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(define-key menu-bar-edit-menu [fill] '("Fill" . fill-region))
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(define-key menu-bar-edit-menu [clear] '("Clear" . delete-region))
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(define-key menu-bar-edit-menu [query-replace]
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'("Query Replace" . query-replace))
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(define-key menu-bar-edit-menu [re-search-back]
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'("Regexp Search Backwards" . re-search-backward))
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(define-key menu-bar-edit-menu [search-back]
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'("Search Backwards" . search-backward))
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(define-key menu-bar-edit-menu [re-search-fwd]
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'("Regexp Search" . re-search-forward))
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(define-key menu-bar-edit-menu [search-fwd]
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'("Search" . search-forward))
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(define-key menu-bar-edit-menu [choose-next-paste]
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'("Choose Next Paste" . mouse-menu-choose-yank))
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(define-key menu-bar-edit-menu [paste] '("Paste" . yank))
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(define-key menu-bar-edit-menu [copy] '("Copy" . kill-ring-save))
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(define-key menu-bar-edit-menu [cut] '("Cut" . kill-region))
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(define-key menu-bar-edit-menu [undo] '("Undo" . undo))
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(put 'fill-region 'menu-enable 'mark-active)
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(put 'kill-region 'menu-enable 'mark-active)
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(put 'kill-ring-save 'menu-enable 'mark-active)
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(put 'yank 'menu-enable '(x-selection-exists-p))
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(put 'delete-region 'menu-enable 'mark-active)
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(put 'undo 'menu-enable '(if (eq last-command 'undo)
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pending-undo-list
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(consp buffer-undo-list)))
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(put 'query-replace 'menu-enable (not buffer-read-only))
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(autoload 'ispell-menu-map "ispell" nil t 'keymap)
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(define-key menu-bar-help-menu [emacs-tutorial]
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'("Emacs Tutorial" . help-with-tutorial))
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(define-key menu-bar-help-menu [man] '("Man..." . manual-entry))
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(define-key menu-bar-help-menu [describe-variable]
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'("Describe Variable..." . describe-variable))
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(define-key menu-bar-help-menu [describe-function]
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'("Describe Function..." . describe-function))
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(define-key menu-bar-help-menu [describe-key]
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'("Describe Key..." . describe-key))
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(define-key menu-bar-help-menu [list-keybindings]
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'("List Keybindings" . describe-bindings))
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(define-key menu-bar-help-menu [command-apropos]
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'("Command Apropos..." . command-apropos))
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(define-key menu-bar-help-menu [describe-mode]
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'("Describe Mode" . describe-mode))
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(define-key menu-bar-help-menu [info] '("Info" . info))
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(define-key menu-bar-help-menu [emacs-news] '("Emacs News" . view-emacs-news))
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(defun kill-this-buffer () ; for the menubar
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"Kills the current buffer."
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(interactive)
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(kill-buffer (current-buffer)))
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(defun kill-this-buffer-enabled-p ()
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(let ((count 0)
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(buffers (buffer-list)))
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(while buffers
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(or (string-match "^ " (buffer-name (car buffers)))
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(setq count (1+ count)))
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(setq buffers (cdr buffers)))
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(> count 1)))
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(put 'save-buffer 'menu-enable '(buffer-modified-p))
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(put 'revert-buffer 'menu-enable
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'(or revert-buffer-function revert-buffer-insert-file-contents-function
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(and (buffer-file-name)
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(or (buffer-modified-p)
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(not (verify-visited-file-modtime (current-buffer)))))))
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;; Permit deleting frame if it would leave a visible or iconified frame.
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(put 'delete-frame 'menu-enable
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'(let ((frames (frame-list))
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(count 0))
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(while frames
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(if (cdr (assq 'visibility (frame-parameters (car frames))))
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(setq count (1+ count)))
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(setq frames (cdr frames)))
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(> count 1)))
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(put 'kill-this-buffer 'menu-enable '(kill-this-buffer-enabled-p))
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(put 'advertised-undo 'menu-enable
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'(and (not (eq t buffer-undo-list))
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(if (eq last-command 'undo)
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(and (boundp 'pending-undo-list)
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pending-undo-list)
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buffer-undo-list)))
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(defvar yank-menu-length 100
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"*Maximum length of an item in the menu for \
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\\[mouse-menu-choose-yank].")
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(defun mouse-menu-choose-yank (event)
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"Pop up a menu of the kill-ring for selection with the mouse.
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The kill-ring-yank-pointer is moved to the selected element.
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A subsequent \\[yank] yanks the choice just selected."
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(interactive "e")
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(let* ((count 0)
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(menu (mapcar (lambda (string)
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(if (> (length string) yank-menu-length)
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(setq string (substring string
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0 yank-menu-length)))
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(prog1 (cons string count)
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(setq count (1+ count))))
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kill-ring))
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(arg (x-popup-menu event
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(list "Yank Menu"
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(cons "Choose Next Yank" menu)))))
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;; A mouse click outside the menu returns nil.
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;; Avoid a confusing error from passing nil to rotate-yank-pointer.
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;; XXX should this perhaps do something other than simply return? -rm
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(if arg
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(progn
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;; We don't use `rotate-yank-pointer' because we want to move
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;; relative to the beginning of kill-ring, not the current
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;; position. Also, that would ask for any new X selection and
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;; thus change the list of items the user just chose from, which
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;; would be highly confusing.
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(setq kill-ring-yank-pointer (nthcdr arg kill-ring))
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(if (interactive-p)
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(message "The next yank will insert the selected text.")
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(current-kill 0))))))
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(put 'mouse-menu-choose-yank 'menu-enable 'kill-ring)
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(define-key global-map [menu-bar buffer] '("Buffers" . mouse-menu-bar-buffers))
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(defvar complex-buffers-menu-p nil
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"*Non-nil says, offer a choice of actions after you pick a buffer.
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This applies to the Buffers menu from the menu bar.")
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(defvar buffers-menu-max-size 10
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"*Maximum number of entries which may appear on the Buffers menu.
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If this is 10, then only the ten most-recently-selected buffers are shown.
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If this is nil, then all buffers are shown.
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A large number or nil slows down menu responsiveness.")
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(defvar list-buffers-directory nil)
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(defun mouse-menu-bar-buffers (event)
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"Pop up a menu of buffers for selection with the mouse.
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This switches buffers in the window that you clicked on,
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and selects that window."
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(interactive "e")
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(let ((buffers (buffer-list))
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menu)
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;; If requested, list only the N most recently selected buffers.
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(if (and (integerp buffers-menu-max-size)
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(> buffers-menu-max-size 1))
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(if (> (length buffers) buffers-menu-max-size)
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(setcdr (nthcdr buffers-menu-max-size buffers) nil)))
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(setq menu
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(cons "Select Buffer"
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(let ((tail buffers)
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(maxbuf 0)
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(maxlen 0)
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head)
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(while tail
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(or (eq ?\ (aref (buffer-name (car tail)) 0))
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(setq maxbuf
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(max maxbuf
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(length (buffer-name (car tail))))))
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(setq tail (cdr tail)))
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(setq tail buffers)
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(while tail
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(let ((elt (car tail)))
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(if (not (string-match "^ "
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(buffer-name elt)))
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(setq head (cons
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(cons
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(format
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(format "%%%ds %%s%%s %%s"
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maxbuf)
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(buffer-name elt)
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(if (buffer-modified-p elt)
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"*" " ")
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(save-excursion
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(set-buffer elt)
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(if buffer-read-only "%" " "))
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(or (buffer-file-name elt)
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(save-excursion
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(set-buffer elt)
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list-buffers-directory)
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""))
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elt)
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head)))
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(and head (> (length (car (car head))) maxlen)
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(setq maxlen (length (car (car head))))))
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(setq tail (cdr tail)))
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(nconc (nreverse head)
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(list (cons
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(concat (make-string (max (- (/ maxlen
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2)
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8)
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0) ?\ )
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"List All Buffers")
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'list-buffers))))))
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(setq menu (list menu))
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(if (cdr (frame-list))
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(setq menu
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(cons (cons "Select Frame"
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(mapcar (lambda (frame)
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(cons (cdr (assq 'name
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(frame-parameters frame)))
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frame))
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(frame-list)))
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menu)))
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(setq menu (cons "Buffer and Frame Menu" menu))
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(let ((buf (x-popup-menu (if (listp event) event
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(cons '(0 0) (selected-frame)))
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menu))
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(window (and (listp event) (posn-window (event-start event)))))
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(cond ((framep buf)
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(make-frame-visible buf)
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(raise-frame buf)
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(select-frame buf))
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((eq buf 'list-buffers)
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(list-buffers))
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(buf
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(if complex-buffers-menu-p
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(let ((action (x-popup-menu
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(if (listp event) event
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(cons '(0 0) (selected-frame)))
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'("Buffer Action"
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(""
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("Save Buffer" . save-buffer)
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("Kill Buffer" . kill-buffer)
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("Select Buffer" . switch-to-buffer))))))
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(if (eq action 'save-buffer)
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(save-excursion
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(set-buffer buf)
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(save-buffer))
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(funcall action buf)))
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(and (windowp window)
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(select-window window))
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(switch-to-buffer buf)))))))
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;; this version is too slow
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;;;(defun format-buffers-menu-line (buffer)
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;;; "Returns a string to represent the given buffer in the Buffer menu.
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;;;nil means the buffer shouldn't be listed. You can redefine this."
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;;; (if (string-match "\\` " (buffer-name buffer))
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;;; nil
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;;; (save-excursion
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;;; (set-buffer buffer)
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;;; (let ((size (buffer-size)))
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;;; (format "%s%s %-19s %6s %-15s %s"
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;;; (if (buffer-modified-p) "*" " ")
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;;; (if buffer-read-only "%" " ")
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;;; (buffer-name)
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;;; size
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;;; mode-name
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;;; (or (buffer-file-name) ""))))))
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(defun menu-bar-mode (flag)
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"Toggle display of a menu bar on each frame.
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This command applies to all frames that exist and frames to be
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created in the future.
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With a numeric argument, if the argument is negative,
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turn off menu bars; otherwise, turn on menu bars."
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(interactive "P")
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(if flag (setq flag (prefix-numeric-value flag)))
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;; Obtain the current setting by looking at default-frame-alist.
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(let ((menu-bar-mode
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(not (zerop (let ((assq (assq 'menu-bar-lines default-frame-alist)))
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(if assq (cdr assq) 0))))))
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;; Tweedle it according to the argument.
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(setq menu-bar-mode (if (null flag) (not menu-bar-mode)
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(or (not (numberp flag)) (>= flag 0))))
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;; Apply it to default-frame-alist.
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(let ((parameter (assq 'menu-bar-lines default-frame-alist)))
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(if (consp parameter)
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(setcdr parameter (if menu-bar-mode 1 0))
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(setq default-frame-alist
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(cons (cons 'menu-bar-lines (if menu-bar-mode 1 0))
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default-frame-alist))))
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;; Apply it to existing frames.
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(let ((frames (frame-list)))
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(while frames
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(modify-frame-parameters (car frames)
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(list (cons 'menu-bar-lines
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(if menu-bar-mode 1 0))))
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(setq frames (cdr frames))))))
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;; Make frames created from now on have a menu bar.
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(if window-system
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(menu-bar-mode t))
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(provide 'menu-bar)
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;;; menu-bar.el ends here
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