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+;;; easymenu.el - Easy menu support for Emacs 19 and XEmacs.
+
+;; Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+
+;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
+;; Maintainer: XEmacs Development Team
+;; Keywords: internal, extensions, dumped
+
+;; This file is part of XEmacs.
+
+;; XEmacs 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.
+
+;; XEmacs 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 XEmacs; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+;; 02111-1307, USA.
+
+;;; Synched up with: Not synched with FSF.
+
+;; Commentary:
+
+;; This file is dumped with XEmacs.
+
+;; Easymenu allows you to define menus for both Emacs 19 and XEmacs.
+
+;; This file
+;; The advantages of using easymenu are:
+
+;; - Easier to use than either the Emacs 19 and XEmacs menu syntax.
+
+;; - Common interface for Emacs 18, Emacs 19, and XEmacs.
+;; (The code does nothing when run under Emacs 18).
+
+;; The public functions are:
+
+;; - Function: easy-menu-define SYMBOL MAPS DOC MENU
+;; SYMBOL is both the name of the variable that holds the menu and
+;; the name of a function that will present a the menu.
+;; MAPS is a list of keymaps where the menu should appear in the menubar.
+;; DOC is the documentation string for the variable.
+;; MENU is an XEmacs style menu description.
+
+;; See the documentation for easy-menu-define for details.
+
+;; - Function: easy-menu-change PATH NAME ITEMS
+;; Change an existing menu.
+;; The menu must already exist and be visible on the menu bar.
+;; PATH is a list of strings used for locating the menu on the menu bar.
+;; NAME is the name of the menu.
+;; ITEMS is a list of menu items, as defined in `easy-menu-define'.
+
+;; - Function: easy-menu-add MENU [ MAP ]
+;; Add MENU to the current menubar in MAP.
+
+;; - Function: easy-menu-remove MENU
+;; Remove MENU from the current menubar.
+
+;; Emacs 19 never uses `easy-menu-add' or `easy-menu-remove', menus
+;; automatically appear and disappear when the keymaps specified by
+;; the MAPS argument to `easy-menu-define' are activated.
+
+;; XEmacs will bind the map to button3 in each MAPS, but you must
+;; explicitly call `easy-menu-add' and `easy-menu-remove' to add and
+;; remove menus from the menu bar.
+
+;;; Code:
+
+;; ;;;###autoload
+(defmacro easy-menu-define (symbol maps doc menu)
+ "Define a menu bar submenu in maps MAPS, according to MENU.
+The arguments SYMBOL and DOC are ignored; they are present for
+compatibility only. SYMBOL is not evaluated. In other Emacs versions
+these arguments may be used as a variable to hold the menu data, and a
+doc string for that variable.
+
+The first element of MENU must be a string. It is the menu bar item name.
+The rest of the elements are menu items.
+
+A menu item is usually a vector of three elements: [NAME CALLBACK ENABLE]
+
+NAME is a string--the menu item name.
+
+CALLBACK is a command to run when the item is chosen,
+or a list to evaluate when the item is chosen.
+
+ENABLE is an expression; the item is enabled for selection
+whenever this expression's value is non-nil.
+
+Alternatively, a menu item may have the form:
+
+ [ NAME CALLBACK [ KEYWORD ARG ] ... ]
+
+Where KEYWORD is one of the symbol defined below.
+
+ :keys KEYS
+
+KEYS is a string; a complex keyboard equivalent to this menu item.
+
+ :active ENABLE
+
+ENABLE is an expression; the item is enabled for selection
+whenever this expression's value is non-nil.
+
+ :suffix NAME
+
+NAME is a string; the name of an argument to CALLBACK.
+
+ :style STYLE
+
+STYLE is a symbol describing the type of menu item. The following are
+defined:
+
+toggle: A checkbox.
+ Currently just prepend the name with the string \"Toggle \".
+radio: A radio button.
+nil: An ordinary menu item.
+
+ :selected SELECTED
+
+SELECTED is an expression; the checkbox or radio button is selected
+whenever this expression's value is non-nil.
+Currently just disable radio buttons, no effect on checkboxes.
+
+A menu item can be a string. Then that string appears in the menu as
+unselectable text. A string consisting solely of hyphens is displayed
+as a solid horizontal line.
+
+A menu item can be a list. It is treated as a submenu.
+The first element should be the submenu name. That's used as the
+menu item in the top-level menu. The cdr of the submenu list
+is a list of menu items, as above."
+ (` (progn
+ (defvar (, symbol) nil (, doc))
+ (easy-menu-do-define (quote (, symbol)) (, maps) (, doc) (, menu)))))
+
+(defun easy-menu-do-define (symbol maps doc menu)
+ (if (featurep 'menubar)
+ (progn
+ (set symbol menu)
+ (fset symbol (list 'lambda '(e)
+ doc
+ '(interactive "@e")
+ '(run-hooks 'activate-menubar-hook)
+ '(setq zmacs-region-stays 't)
+ (list 'popup-menu symbol))))))
+
+(defun easy-menu-change (&rest args)
+ (when (featurep 'menubar)
+ (apply 'add-menu args)))
+
+;; This variable hold the easy-menu mode menus of all major and
+;; minor modes currently in effect in the current buffer.
+(defvar easy-menu-all-popups nil)
+(make-variable-buffer-local 'easy-menu-all-popups)
+
+(defun easy-menu-add (menu &optional map)
+ "Add MENU to the current menu bar."
+ (if (featurep 'menubar)
+ (progn
+ (unless (member menu easy-menu-all-popups)
+ (push menu easy-menu-all-popups))
+ (setq mode-popup-menu (if (> (length easy-menu-all-popups) 1)
+ (cons (easy-menu-title)
+ (reverse easy-menu-all-popups))
+ (car easy-menu-all-popups)))
+
+ (cond ((null current-menubar)
+ ;; Don't add it to a non-existing menubar.
+ nil)
+ ((assoc (car menu) current-menubar)
+ ;; Already present.
+ nil)
+ ((equal current-menubar '(nil))
+ ;; Set at left if only contains right marker.
+ (set-buffer-menubar (list menu nil)))
+ (t
+ ;; Add at right.
+ (set-buffer-menubar (copy-sequence current-menubar))
+ (add-menu nil (car menu) (cdr menu)))))))
+
+(defun easy-menu-remove (menu)
+ "Remove MENU from the current menu bar."
+ (if (featurep 'menubar)
+ (progn
+ (setq easy-menu-all-popups (delq menu easy-menu-all-popups)
+ mode-popup-menu (if (< (length easy-menu-all-popups) 1)
+ (cons (easy-menu-title)
+ (reverse easy-menu-all-popups))
+ (car easy-menu-all-popups)))
+
+ (and current-menubar
+ (assoc (car menu) current-menubar)
+ (delete-menu-item (list (car menu)))))))
+
+;; Think up a good title for the menu. Take the major-mode of the
+;; buffer, strip the -mode part, convert hyphens to spaces, and
+;; capitalize it.
+;;
+;; If you can think of something smarter, feel free to replace it.
+;; Don't forget to mail the change to xemacs@xemacs.org where everyone
+;; can flame, er, praise your changes.
+(defun easy-menu-title ()
+ (capitalize (replace-in-string (replace-in-string
+ (symbol-name major-mode) "-mode$" "")
+ "-" " ")))
+
+(provide 'easymenu)
+
+;;; easymenu.el ends here
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