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iswitch-buffer release 1.0

From: Joost Diepenmaat
Subject: iswitch-buffer release 1.0
Date: Mon, 06 Oct 2008 20:26:57 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux)

iswitch-menu is an Emacs extension that aims to make the console menu
interface for emacs much efficient and easy to use, based on the
iswitchb mode for switching buffers by substring/regexp matching

Latest versions are always at:

More info and screenshots:

Please feel free to post questions or suggestions for improvent.

code follows:

;;; iswitch-menu.el --- Use iswitch to access menus

;; Copyright (C) 2008  Joost Diepenmaat

;; Author: Joost Diepenmaat <address@hidden>
;; Keywords: matching, frames, terminals, menus

;; This program 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 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <>.

;;; Commentary:
;; This code replaces tmm-prompt with something a lot more convenient.
;; Prompted by the horrible navigation menus in the otherwise
;; *excellent* emacs-rails library, this code should make using menus
;; without a mouse or X easy on the brain and fingers.
;; to use: put the following in your init file and make sure this
;; file is in your load-path:
;; (require 'iswitch-menu)
;; you can then access the console menu by running
;; M-x tmm-menubar
;; note that this will work even if you're using a GUI menu bar
;; You can customize the menus using the iswitch-menu customization
;; group:
;; M-x customize-group <ENTER> iswitch-menu <ENTER>
;; you can toggle iswitch-menu-override-tmm-prompt if you want to use
;; iswitch-menu-prompt only for specific modes or commands.
;; This code should work as advertized.  If you find any situations
;; where it doesn't work, try the the latest version from

;; If that doesn't work either, please contact the author.  If any
;; errors occur during the creation or executiong of a particular
;; menu, please provide the output of M-x iswitch-menu-report as run
;; immediately after the error.
;; To use with emacs-rails navigation: same as above, and switch on
;; the Rails Always Use Text Menus option in the rails customization
;; group.
;; Alternatively, if you don't like to globally override tmm-prompt,
;; get a version of emacs-rails with configurable text menus, like
;; this one: and
;; switch on rails-always-use-text-menu and set
;; rails-text-menu-function to #'iswitch-menu-prompt
;;; History:
;; Release 1.0 - 2008/10/04 - Set last-command-event when selecting
;;   menu items this means "Paste from kill menu" now works and
;;   possibly fixes some other issues.  As far as I can tell, the code
;;   should now work for any menu that works with tmm-prompt or
;;   x-popup-menu.
;; 2008/10/03 - Evaluated titles in extended menu items now work. As
;;   far as I can tell, this means the menu/keymap parsing code is now
;;   complete.
;; 2008/09/24 - More inline documentation; more conformance to the
;;   elisp conventions.
;; 2008/09/23 - and earlier: less documented versions.

;;; Code:
(eval-when-compile (require 'cl))

(require 'tmm)

(defgroup iswitch-menu nil
  "keyboard driven menus based on iswitchb"
  :group 'menu
  :prefix "iswitch-menu")

(defcustom iswitch-menu-checked-toggle-mark "(*)"
  "A string indicating a menu item is a checked toggle item."
  :group 'iswitch-menu
  :type 'string)

(defcustom iswitch-menu-unchecked-toggle-mark "( )"
  "A string indicating a menu item is an unchecked toggle item."
  :group 'iswitch-menu
  :type 'string)

(defcustom iswitch-menu-checked-radio-mark "[*]"
  "A string indicating a menu item is a checked radio item."
  :group 'iswitch-menu
  :type 'string)

(defcustom iswitch-menu-unchecked-radio-mark "[ ]"
  "A string indicating a menu item is an unchecked radio item."
  :group 'iswitch-menu
  :type 'string)

(defcustom iswitch-menu-override-tmm-prompt t
  "If true, override `tmm-prompt' to use `iswitch-menu-prompt'.
this means all `text-mode' menus will use iswitch-menu"
  :group 'iswitch-menu
  :type 'boolean)

;; this will store debug info
(defvar iswitch-menu-parse-error :no-error)
(defvar iswitch-menu-captured-keymap :none)
(defvar iswitch-menu-last-chosen :none)
(defvar iswitch-menu-last-single-prompt :none)

;; adapted from iswitchb.el, Kin Cho
(defun iswitch-menu-single-prompt (prompt items)
  "Display a non-nested menu (using `iswitchb').
PROMPT is a string and ITEMS is an alist of options ((TITLE
. SOMETHING) ...).  Return the selected cons."
  (setq iswitch-menu-last-single-prompt items)
  (let ((iswitchb-make-buflist-hook
         (lambda ()
           (setq iswitchb-temp-buflist (mapcar #'car items)))))
    (let ((r (assoc (iswitchb-read-buffer prompt) items)))
      (setq last-command-event (car r)) ; this is used by "edit > paste from 
kill menu" & others

(defun iswitch-menu-nested-prompt (prompt items)
  "Display a possibly nested menu (using `iswitchb').
PROMPT is a string and ITEMS is an alist consisting of (TITLE
. DEFINITION) pairs.  DEFINITIONs are cons cells
containing (:result . RESULT) or (:menu . ALIST), where RESULT is
returned if the user chooses it, and ALIST is a submenu
  (let ((chosen (iswitch-menu-single-prompt (concat prompt " > ") items)))
    (when chosen
        (setq iswitch-menu-last-chosen chosen)
        (case (cadr chosen)
          (:result (cddr chosen))
          (:menu (iswitch-menu-nested-prompt (concat prompt " > " (car chosen)) 
(cddr chosen)))
          (t chosen)))))

;; see elisp manual section "Extended Menu Items"
(defun iswitch-menu-parse-extended-menu-item (menu-item)
  "Convert an extended MENU-ITEM into a form suitable for `iswitch-menu'.
See also the elisp manual section on Extended Menu Items."
  (when (and (cdr menu-item) ;; skip non-selectable menu-items
             (consp (cdr menu-item))
             (consp (cddr menu-item)))
    (let* ((title (cadr menu-item))
           (binding (caddr menu-item))
           (props (if (keywordp (cadddr menu-item))
                      (cdddr menu-item)
                      (cddddr menu-item)))
           (button (getf props :button)))
      (unless (stringp title)
        (setq title (eval title)))
      (if (getf props :filter)
          (setq binding (funcall (getf props :filter) binding)))
      (if (keymapp binding)
          (setq binding (cons :menu (iswitch-menu-parse-keymap binding)))
        (setq binding (cons :result binding)))
      (if (and (eval (getf props :enable t))
               (eval (getf props :visible t)))
          (if button
              (let* ((ticked (eval (cdr button)))
                     (mark (if (eql :toggle (car button))
                               (if ticked
                             (if ticked
                (cons (concat title " " mark) binding))
            (cons title binding))

(defun iswitch-menu-parse-menu-item (menu-item)
  "Convert a MENU-ITEM into a form suitable for `iswitch-menu'."
  (when (and menu-item
             (consp menu-item)
             (cdr menu-item))
     ((eql (car menu-item) 'menu-item)
      (iswitch-menu-parse-extended-menu-item menu-item))
     ((stringp (car menu-item)) ;; simple menu item
      (let ((binding (if (and (consp (cdr menu-item))
                              (stringp (cadr menu-item)) ;; help string
                              (cddr menu-item)) ;; has a real binding
                         (cddr menu-item)
                       (cdr menu-item))))
        (cons (car menu-item) (if (keymapp binding)
                             (cons :menu (iswitch-menu-parse-keymap binding))
                           (cons :result binding)))))
     (t nil))))

(defun iswitch-menu-parse-keymap (keymap)
 "Convert a KEYMAP menu into a form suitable for `iswitch-menu'."
  (let ((orig-keymap keymap))
    (if (and (symbolp keymap)
             (keymapp keymap))
        (setq keymap (symbol-value keymap)))
    (if (keymapp keymap)
         (let ((result))
           (map-keymap (lambda (key def)
                         (let ((p (iswitch-menu-parse-menu-item def)))
                           (if p
                               (setq result (cons p result))))) keymap)
           (cons (if (consp (cadr keymap))
                     (cadr (cadr keymap))
                   (cadr keymap)) result)
           (nreverse result))
      (remove-if #'null (mapcar #'iswitch-menu-parse-menu-item keymap)))))

(defun iswitch-menu-prompt (menu &rest)
  "A drop-in replacement for `tmm-prompt' and `x-popup-menu' using `iswitchb'.
Should make using MENUs from the console / keyboard faster and
more comfortable."
  (setq iswitch-menu-captured-keymap menu)
  (if (or (keymapp menu)
          (keymapp (car menu)))
      (progn (let ((r (iswitch-menu-nested-prompt "Menu" 
(iswitch-menu-parse-keymap menu))))
               (call-interactively (cond ((symbolp r) r)
                                         ((and (consp r) (consp (car r)) (eql 
'lambda (cadr r))) (cdr r))))))
    (iswitch-menu-nested-prompt (caadr menu) (remove-if #'null (mapcar 
#'iswitch-menu-parse-menu-item (cdadr menu))))))

(defadvice tmm-prompt (around use-iswitch-menu-prompt (menu &rest rest))
  "Call either `tmm-prompt' or `iswitch-menu-prompt'.
Which is called depends on the `iswitch-menu-override-tmm-prompt'
customization setting"
  (if iswitch-menu-override-tmm-prompt
      (iswitch-menu-prompt menu)

(ad-enable-advice #'tmm-prompt 'around 'use-iswitch-menu-prompt)
(ad-activate #'tmm-prompt)

(defun iswitch-menu-report ()
  "Show debug information for `iswitch-menu'."
  (let ((buf (generate-new-buffer "*ISWITCH-MENU-DEBUG*")))
    (display-buffer buf)
    (set-buffer buf)
    (insert "iswitch-menu debug info:\n\n")
    (dolist (s '(iswitch-menu-parse-error iswitch-menu-captured-keymap 
iswitch-menu-last-chosen iswitch-menu-last-single-prompt))
      (insert (symbol-name s) ": " (pp-to-string (symbol-value s)) "\n\n"))))

(provide 'iswitch-menu)
;;; iswitch-menu.el ends here

Joost Diepenmaat | blog: | work:

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