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|
;;; easymenu.el - Easy menu support for Emacs 19 and XEmacs.
;;
;; $Id: easymenu.el,v 5.9 1995/02/14 19:44:00 amanda Exp $
;;
;; LCD Archive Entry:
;; easymenu|Per Abrahamsen|abraham@iesd.auc.dk|
;; Easy menu support for XEmacs|
;; $Date: 1995/02/14 19:44:00 $|$Revision: 5.9 $|~/misc/easymenu.el.gz|
;; Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
;; 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:
;;
;; 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
|
