1994-03-25 07:38:29 +00:00
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;;; easymenu.el --- support the easymenu interface for defining a menu.
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1998-01-27 20:43:57 +00:00
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;; Copyright (C) 1994, 1996, 1998 Free Software Foundation, Inc.
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1994-03-25 07:38:29 +00:00
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1994-03-30 18:57:29 +00:00
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;; Keywords: emulations
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;; Author: rms
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1994-03-25 07:38:29 +00:00
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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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1996-01-14 07:34:30 +00:00
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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1994-03-25 07:38:29 +00:00
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1996-01-14 07:34:30 +00:00
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;;; Commentary:
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;; This is compatible with easymenu.el by Per Abrahamsen
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;; but it is much simpler as it doesn't try to support other Emacs versions.
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;; The code was mostly derived from lmenu.el.
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1994-03-25 07:38:29 +00:00
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;;; Code:
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1994-03-27 07:36:35 +00:00
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;;;###autoload
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1994-03-30 18:57:29 +00:00
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(defmacro easy-menu-define (symbol maps doc menu)
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1994-03-25 07:38:29 +00:00
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"Define a menu bar submenu in maps MAPS, according to MENU.
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1995-04-24 05:36:53 +00:00
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The menu keymap is stored in symbol SYMBOL, both as its value
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and as its function definition. DOC is used as the doc string for SYMBOL.
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1994-03-25 07:38:29 +00:00
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The first element of MENU must be a string. It is the menu bar item name.
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1998-01-27 20:43:57 +00:00
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It may be followed by the keyword argument pair
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:filter FUNCTION
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FUNCTION is a function with one argument, the menu. It returns the actual
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menu displayed.
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1994-03-25 07:38:29 +00:00
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The rest of the elements are menu items.
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1994-03-30 18:57:29 +00:00
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A menu item is usually a vector of three elements: [NAME CALLBACK ENABLE]
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1994-03-25 07:38:29 +00:00
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1994-03-27 07:36:35 +00:00
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NAME is a string--the menu item name.
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1994-03-25 07:38:29 +00:00
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1994-03-27 07:36:35 +00:00
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CALLBACK is a command to run when the item is chosen,
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or a list to evaluate when the item is chosen.
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1994-03-25 07:38:29 +00:00
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1994-08-14 04:09:30 +00:00
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ENABLE is an expression; the item is enabled for selection
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whenever this expression's value is non-nil.
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1994-03-30 18:57:29 +00:00
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1994-10-28 04:31:05 +00:00
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Alternatively, a menu item may have the form:
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[ NAME CALLBACK [ KEYWORD ARG ] ... ]
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1998-01-27 20:43:57 +00:00
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Where KEYWORD is one of the symbols defined below.
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1994-10-28 04:31:05 +00:00
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:keys KEYS
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KEYS is a string; a complex keyboard equivalent to this menu item.
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This is normally not needed because keyboard equivalents are usually
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computed automatically.
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:active ENABLE
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ENABLE is an expression; the item is enabled for selection
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whenever this expression's value is non-nil.
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:suffix NAME
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NAME is a string; the name of an argument to CALLBACK.
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1996-01-09 23:16:13 +00:00
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:style STYLE
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1994-10-28 04:31:05 +00:00
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STYLE is a symbol describing the type of menu item. The following are
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defined:
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1997-01-02 20:20:22 +00:00
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toggle: A checkbox.
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Prepend the name with '(*) ' or '( ) ' depending on if selected or not.
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radio: A radio button.
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Prepend the name with '[X] ' or '[ ] ' depending on if selected or not.
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1994-10-28 04:31:05 +00:00
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nil: An ordinary menu item.
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:selected SELECTED
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SELECTED is an expression; the checkbox or radio button is selected
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whenever this expression's value is non-nil.
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1994-03-27 07:36:35 +00:00
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A menu item can be a string. Then that string appears in the menu as
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unselectable text. A string consisting solely of hyphens is displayed
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as a solid horizontal line.
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1994-03-25 07:38:29 +00:00
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1994-03-27 07:36:35 +00:00
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A menu item can be a list. It is treated as a submenu.
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1994-03-25 07:38:29 +00:00
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The first element should be the submenu name. That's used as the
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1998-01-27 20:43:57 +00:00
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menu item name in the top-level menu. It may be followed by the :filter
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FUNCTION keyword argument pair. The rest of the submenu list are menu items,
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as above."
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`(progn
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(defvar ,symbol nil ,doc)
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(easy-menu-do-define (quote ,symbol) ,maps ,doc ,menu)))
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1994-10-28 04:31:05 +00:00
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1995-05-20 04:29:39 +00:00
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;;;###autoload
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1994-10-28 04:31:05 +00:00
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(defun easy-menu-do-define (symbol maps doc menu)
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;; We can't do anything that might differ between Emacs dialects in
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;; `easy-menu-define' in order to make byte compiled files
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;; compatible. Therefore everything interesting is done in this
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;; function.
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1998-01-27 20:43:57 +00:00
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(set symbol (easy-menu-create-menu (car menu) (cdr menu)))
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1994-10-28 04:31:05 +00:00
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(fset symbol (` (lambda (event) (, doc) (interactive "@e")
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1996-09-11 03:47:43 +00:00
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(x-popup-menu event (, symbol)))))
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1994-10-28 04:31:05 +00:00
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(mapcar (function (lambda (map)
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(define-key map (vector 'menu-bar (intern (car menu)))
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(cons (car menu) (symbol-value symbol)))))
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(if (keymapp maps) (list maps) maps)))
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1994-03-27 07:36:35 +00:00
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1998-01-27 20:43:57 +00:00
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(defun easy-menu-filter-return (menu)
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"Convert MENU to the right thing to return from a menu filter.
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MENU is a menu as computed by `easy-menu-define' or `easy-menu-create-menu' or
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a symbol whose value is such a menu.
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In Emacs a menu filter must return a menu (a keymap), in XEmacs a filter must
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return a menu items list (without menu name and keywords). This function
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returns the right thing in the two cases."
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(easy-menu-get-map menu nil)) ; Get past indirections.
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1994-03-25 07:38:29 +00:00
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1994-10-18 04:59:45 +00:00
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;;;###autoload
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1998-01-27 20:43:57 +00:00
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(defun easy-menu-create-menu (menu-name menu-items)
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"Create a menu called MENU-NAME with items described in MENU-ITEMS.
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MENU-NAME is a string, the name of the menu. MENU-ITEMS is a list of items
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possibly preceded by keyword pairs as described in `easy-menu-define'."
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(let ((menu (make-sparse-keymap menu-name))
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1998-04-24 01:54:09 +00:00
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prop keyword arg label enable filter visible)
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1998-01-27 20:43:57 +00:00
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;; Look for keywords.
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(while (and menu-items (cdr menu-items)
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(symbolp (setq keyword (car menu-items)))
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(= ?: (aref (symbol-name keyword) 0)))
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1998-04-24 01:54:09 +00:00
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(setq arg (cadr menu-items))
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(setq menu-items (cddr menu-items))
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(cond
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((eq keyword ':filter) (setq filter arg))
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((eq keyword ':active) (setq enable (or arg ''nil)))
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((eq keyword ':label) (setq label arg))
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((eq keyword ':visible) (setq visible (or arg ''nil)))))
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(if (equal visible ''nil) nil ; Invisible menu entry, return nil.
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(if (and visible (not (easy-menu-always-true visible)))
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(setq prop (cons :visible (cons visible prop))))
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(if (and enable (not (easy-menu-always-true enable)))
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(setq prop (cons :enable (cons enable prop))))
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(if filter (setq prop (cons :filter (cons filter prop))))
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(if label (setq prop (cons nil (cons label prop))))
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(while menu-items
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(easy-menu-do-add-item menu (car menu-items))
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(setq menu-items (cdr menu-items)))
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(when prop
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(setq menu (easy-menu-make-symbol menu))
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(put menu 'menu-prop prop))
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menu)))
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1994-03-25 07:38:29 +00:00
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1998-01-27 20:43:57 +00:00
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;; Button prefixes.
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(defvar easy-menu-button-prefix
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1998-04-24 01:54:09 +00:00
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'((radio . :radio) (toggle . :toggle)))
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1998-01-27 20:43:57 +00:00
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1998-04-24 01:54:09 +00:00
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(defun easy-menu-do-add-item (menu item &optional before)
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;; Parse an item description and add the item to a keymap. This is
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;; the function that is used for item definition by the other easy-menu
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;; functions.
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1998-01-30 02:15:13 +00:00
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;; MENU is a sparse keymap i.e. a list starting with the symbol `keymap'.
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;; ITEM defines an item as in `easy-menu-define'.
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1998-04-24 01:54:09 +00:00
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;; Optional argument BEFORE is nil or a key in MENU. If BEFORE is not nil
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;; put item before BEFORE in MENU, otherwise if item is already present in
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;; MENU, just change it, otherwise put it last in MENU.
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(let (name command label prop remove)
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1998-01-27 20:43:57 +00:00
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(cond
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((stringp item)
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(setq label
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(if (string-match ; If an XEmacs separator
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"^\\(-+\\|\
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--:\\(\\(no\\|\\(sing\\|doub\\)le\\(Dashed\\)?\\)Line\\|\
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shadow\\(Double\\)?Etched\\(In\\|Out\\)\\(Dash\\)?\\)\\)$"
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item) "" ; use a single line separator.
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item)))
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((consp item)
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(setq label (setq name (car item)))
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(setq command (cdr item))
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(if (not (keymapp command))
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(setq command (easy-menu-create-menu name command)))
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(if (null command)
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;; Invisible menu item. Don't insert into keymap.
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(setq remove t)
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(when (and (symbolp command) (setq prop (get command 'menu-prop)))
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(when (null (car prop))
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(setq label (cadr prop))
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(setq prop (cddr prop)))
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(setq command (symbol-function command)))))
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((vectorp item)
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(let ((active (if (> (length item) 2) (or (aref item 2) ''nil) t))
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(no-name (not (symbolp (setq command (aref item 1)))))
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cache cache-specified
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(count 2))
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(setq label (setq name (aref item 0)))
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(if no-name (setq command (easy-menu-make-symbol command)))
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1998-01-27 20:43:57 +00:00
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(if (and (symbolp active) (= ?: (aref (symbol-name active) 0)))
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1998-04-24 01:54:09 +00:00
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(let ((count 2)
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keyword arg suffix visible style selected keys)
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(setq active nil)
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1998-01-27 20:43:57 +00:00
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(while (> (length item) count)
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(setq keyword (aref item count))
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(setq arg (aref item (1+ count)))
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(setq count (+ 2 count))
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(cond
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1998-04-24 01:54:09 +00:00
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((eq keyword :visible) (setq visible (or arg ''nil)))
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((eq keyword :key-sequence)
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(setq cache arg cache-specified t))
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((eq keyword :keys) (setq keys arg no-name nil))
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((eq keyword :label) (setq label arg))
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((eq keyword :active) (setq active (or arg ''nil)))
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((eq keyword :suffix) (setq suffix arg))
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((eq keyword :style) (setq style arg))
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((eq keyword :selected) (setq selected (or arg ''nil)))))
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(if (stringp suffix)
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(setq label (if (stringp label) (concat label " " suffix)
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(list 'concat label (concat " " suffix)))))
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(if (and selected
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(setq style (assq style easy-menu-button-prefix)))
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(setq prop (cons :button
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(cons (cons (cdr style) (or selected ''nil))
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prop))))
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(when (stringp keys)
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(if (string-match "^[^\\]*\\(\\\\\\[\\([^]]+\\)]\\)[^\\]*$"
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keys)
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(let ((prefix
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(if (< (match-beginning 0) (match-beginning 1))
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(substring keys 0 (match-beginning 1))))
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(postfix
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(if (< (match-end 1) (match-end 0))
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(substring keys (match-end 1))))
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(cmd (intern (substring keys (match-beginning 2)
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(match-end 2)))))
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(setq keys
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(and (or prefix postfix (not (eq command cmd)))
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(cons cmd
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(and (or prefix postfix)
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(cons prefix postfix))))))
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(setq cache-specified nil))
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(if keys (setq prop (cons :keys (cons keys prop)))))
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(if (and visible (not (easy-menu-always-true visible)))
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(if (equal visible ''nil)
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;; Invisible menu item. Don't insert into keymap.
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(setq remove t)
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(setq prop (cons :visible (cons visible prop)))))))
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(if (and active (not (easy-menu-always-true active)))
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(setq prop (cons :enable (cons active prop))))
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(if (and (or no-name cache-specified)
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(or (null cache) (stringp cache) (vectorp cache)))
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(setq prop (cons :key-sequence (cons cache prop))))))
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(t (error "Invalid menu item in easymenu.")))
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(easy-menu-define-key menu (if (stringp name) (intern name) name)
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(and (not remove)
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(cons 'menu-item
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(cons label
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(and name (cons command prop)))))
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(if (stringp before) (intern before) before))))
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(defun easy-menu-define-key (menu key item &optional before)
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;; Add binding in MENU for KEY => ITEM. Similar to `define-key-after'.
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;; If KEY is not nil then delete any duplications. If ITEM is nil, then
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;; don't insert, only delete.
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;; Optional argument BEFORE is nil or a key in MENU. If BEFORE is not nil
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;; put binding before BEFORE in MENU, otherwise if binding is already
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;; present in MENU, just change it, otherwise put it last in MENU.
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(let ((inserted (null item)) ; Fake already inserted.
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1998-04-28 20:03:07 +00:00
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tail done)
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1998-01-30 02:15:13 +00:00
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(while (not done)
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(cond
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((or (setq done (or (null (cdr menu)) (keymapp (cdr menu))))
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1998-04-24 01:54:09 +00:00
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(and before (equal (car-safe (cadr menu)) before)))
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;; If key is nil, stop here, otherwise keep going past the
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1998-01-30 02:15:13 +00:00
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;; inserted element so we can delete any duplications that come
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;; later.
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1998-04-24 01:54:09 +00:00
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(if (null key) (setq done t))
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1998-01-30 02:15:13 +00:00
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(unless inserted ; Don't insert more than once.
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1998-04-24 01:54:09 +00:00
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(setcdr menu (cons (cons key item) (cdr menu)))
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1998-01-30 02:15:13 +00:00
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|
(setq inserted t)
|
1998-04-28 20:03:07 +00:00
|
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(setq menu (cdr menu)))
|
|
|
|
(setq menu (cdr menu)))
|
1998-04-24 01:54:09 +00:00
|
|
|
((and key (equal (car-safe (cadr menu)) key))
|
1998-04-28 20:03:07 +00:00
|
|
|
(if (or inserted ; Already inserted or
|
|
|
|
(and before ; wanted elsewhere and
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|
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(setq tail (cddr menu)) ; not last item and not
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|
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(not (keymapp tail))
|
|
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(not (equal (car-safe (car tail)) before)))) ; in position
|
1998-04-24 01:54:09 +00:00
|
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(setcdr menu (cddr menu)) ; Remove item.
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|
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(setcdr (cadr menu) item) ; Change item.
|
1998-04-28 20:03:07 +00:00
|
|
|
(setq inserted t)
|
|
|
|
(setq menu (cdr menu))))
|
|
|
|
(t (setq menu (cdr menu)))))))
|
|
|
|
|
1998-04-24 01:54:09 +00:00
|
|
|
(defun easy-menu-always-true (x)
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|
|
|
;; Return true if X never evaluates to nil.
|
|
|
|
(if (consp x) (and (eq (car x) 'quote) (cadr x))
|
|
|
|
(or (eq x t) (not (symbolp x)))))
|
1998-01-27 20:43:57 +00:00
|
|
|
|
|
|
|
(defvar easy-menu-item-count 0)
|
|
|
|
|
1998-04-24 01:54:09 +00:00
|
|
|
(defun easy-menu-make-symbol (callback)
|
1998-01-27 20:43:57 +00:00
|
|
|
;; Return a unique symbol with CALLBACK as function value.
|
|
|
|
(let ((command
|
|
|
|
(make-symbol (format "menu-function-%d" easy-menu-item-count))))
|
|
|
|
(setq easy-menu-item-count (1+ easy-menu-item-count))
|
|
|
|
(fset command
|
1998-04-24 01:54:09 +00:00
|
|
|
(if (keymapp callback) callback
|
|
|
|
`(lambda () (interactive) ,callback)))
|
1998-01-27 20:43:57 +00:00
|
|
|
command))
|
|
|
|
|
1998-05-11 23:34:25 +00:00
|
|
|
;;;###autoload
|
1998-01-27 20:43:57 +00:00
|
|
|
(defun easy-menu-change (path name items &optional before)
|
1994-06-29 16:28:50 +00:00
|
|
|
"Change menu found at PATH as item NAME to contain ITEMS.
|
|
|
|
PATH is a list of strings for locating the menu containing NAME in the
|
|
|
|
menu bar. ITEMS is a list of menu items, as in `easy-menu-define'.
|
|
|
|
These items entirely replace the previous items in that map.
|
1998-01-27 20:43:57 +00:00
|
|
|
If NAME is not present in the menu located by PATH, then add item NAME to
|
|
|
|
that menu. If the optional argument BEFORE is present add NAME in menu
|
|
|
|
just before BEFORE, otherwise add at end of menu.
|
1994-06-29 16:28:50 +00:00
|
|
|
|
1998-01-27 20:43:57 +00:00
|
|
|
Either call this from `menu-bar-update-hook' or use a menu filter,
|
|
|
|
to implement dynamic menus."
|
|
|
|
(easy-menu-add-item nil path (cons name items) before))
|
1994-06-29 16:28:50 +00:00
|
|
|
|
1998-01-27 20:43:57 +00:00
|
|
|
;; XEmacs needs the following two functions to add and remove menus.
|
|
|
|
;; In Emacs this is done automatically when switching keymaps, so
|
|
|
|
;; here these functions are noops.
|
1994-10-28 04:31:05 +00:00
|
|
|
(defun easy-menu-remove (menu))
|
1994-03-30 18:57:29 +00:00
|
|
|
|
1994-10-28 04:31:05 +00:00
|
|
|
(defun easy-menu-add (menu &optional map))
|
1994-03-30 18:57:29 +00:00
|
|
|
|
1998-01-27 20:43:57 +00:00
|
|
|
(defun easy-menu-add-item (menu path item &optional before)
|
|
|
|
"At the end of the submenu of MENU with path PATH add ITEM.
|
|
|
|
If ITEM is already present in this submenu, then this item will be changed.
|
|
|
|
otherwise ITEM will be added at the end of the submenu, unless the optional
|
|
|
|
argument BEFORE is present, in which case ITEM will instead be added
|
|
|
|
before the item named BEFORE.
|
|
|
|
MENU is either a symbol, which have earlier been used as the first
|
|
|
|
argument in a call to `easy-menu-define', or the value of such a symbol
|
|
|
|
i.e. a menu, or nil which stands for the menu-bar itself.
|
|
|
|
PATH is a list of strings for locating the submenu where ITEM is to be
|
|
|
|
added. If PATH is nil, MENU itself is used. Otherwise, the first
|
|
|
|
element should be the name of a submenu directly under MENU. This
|
|
|
|
submenu is then traversed recursively with the remaining elements of PATH.
|
|
|
|
ITEM is either defined as in `easy-menu-define' or a menu defined earlier
|
|
|
|
by `easy-menu-define' or `easy-menu-create-menu'."
|
1998-04-24 01:54:09 +00:00
|
|
|
(setq menu (easy-menu-get-map menu path))
|
|
|
|
(if (or (keymapp item)
|
|
|
|
(and (symbolp item) (keymapp (symbol-value item))))
|
|
|
|
;; Item is a keymap, find the prompt string and use as item name.
|
|
|
|
(let ((tail (easy-menu-get-map item nil)) name)
|
|
|
|
(if (not (keymapp item)) (setq item tail))
|
|
|
|
(while (and (null name) (consp (setq tail (cdr tail)))
|
|
|
|
(not (keymapp tail)))
|
|
|
|
(if (stringp (car tail)) (setq name (car tail)) ; Got a name.
|
|
|
|
(setq tail (cdr tail))))
|
|
|
|
(setq item (cons name item))))
|
|
|
|
(easy-menu-do-add-item menu item before))
|
1998-01-27 20:43:57 +00:00
|
|
|
|
|
|
|
(defun easy-menu-item-present-p (menu path name)
|
|
|
|
"In submenu of MENU with path PATH, return true iff item NAME is present.
|
|
|
|
MENU and PATH are defined as in `easy-menu-add-item'.
|
|
|
|
NAME should be a string, the name of the element to be looked for."
|
|
|
|
(lookup-key (easy-menu-get-map menu path) (vector (intern name))))
|
|
|
|
|
|
|
|
(defun easy-menu-remove-item (menu path name)
|
|
|
|
"From submenu of MENU with path PATH remove item NAME.
|
|
|
|
MENU and PATH are defined as in `easy-menu-add-item'.
|
|
|
|
NAME should be a string, the name of the element to be removed."
|
1998-04-24 01:54:09 +00:00
|
|
|
(easy-menu-define-key (easy-menu-get-map menu path) (intern name) nil))
|
1998-01-27 20:43:57 +00:00
|
|
|
|
|
|
|
(defun easy-menu-get-map (menu path)
|
|
|
|
;; Return a sparse keymap in which to add or remove an item.
|
1998-04-24 01:54:09 +00:00
|
|
|
;; MENU and PATH are as defined in `easy-menu-add-item'.
|
1998-01-27 20:43:57 +00:00
|
|
|
(if (null menu)
|
|
|
|
(setq menu (key-binding (vconcat '(menu-bar) (mapcar 'intern path))))
|
|
|
|
(if (and (symbolp menu) (not (keymapp menu)))
|
|
|
|
(setq menu (symbol-value menu)))
|
|
|
|
(if path (setq menu (lookup-key menu (vconcat (mapcar 'intern path))))))
|
|
|
|
(while (and (symbolp menu) (keymapp menu))
|
|
|
|
(setq menu (symbol-function menu)))
|
|
|
|
(or (keymapp menu) (error "Malformed menu in easy-menu: (%s)" menu))
|
|
|
|
menu)
|
|
|
|
|
1994-03-25 07:38:29 +00:00
|
|
|
(provide 'easymenu)
|
|
|
|
|
|
|
|
;;; easymenu.el ends here
|