< Emacs

bind-key est une extension Emacs permettant la gestion des raccourcis clavier.


L'utilisateur peut définir ses propres raccourcis clavier que l'on retrouve généralement dans le fichier .emacs. Leur gestion peut s'avérer délicate lorsque leur nombre est important, sans compter que lesdits raccourcis peuvent être écrasés par des nouvelles versions de l'éditeur GNU Emacs.

Développée et maintenue par John Wiegley, la dernière verion de l'extension bind-key a été réalisée le 16 juin 2012[1].

bind-key est un logiciel libre distribué selon les termes de la licence publique générale GNU.

Code source

;;; bind-key --- A simple way to manage personal keybindings

;; Copyright (C) 2012 John Wiegley

;; Author: John Wiegley <jwiegley@gmail.com>
;; Created: 16 Jun 2012
;; Version: 1.0
;; Keywords: keys keybinding config dotemacs
;; X-URL: https://github.com/jwiegley/bind-key

;; 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, 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
;; General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;; If you have lots of keybindings set in your .emacs file, it can be hard to
;; know which ones you haven't set yet, and which may now be overriding some
;; new default in a new Emacs version. This module aims to solve that
;; problem.
;; Bind keys as follows in your .emacs:
;; (require 'bind-key)
;; (bind-key "C-c x" 'my-ctrl-c-x-command)
;; If you want the keybinding to override all minor modes that may also bind
;; the same key, use the `bind-key*' form:
;; (bind-key* "<C-return>" 'other-window)
;; If you want to rebind a key only in a particular key, use:
;; (bind-key "C-c x" 'my-ctrl-c-x-command some-other-mode-map)
;; To unbind a key within a keymap (for example, to stop your favorite major
;; mode from changing a binding that you don't want to override everywhere),
;; use `unbind-key':
;; (unbind-key "C-c x" some-other-mode-map)
;; After Emacs loads, you can see a summary of all your personal keybindings
;; currently in effect with this command:
;; M-x describe-personal-keybindings
;; This display will tell you if you've overriden a default keybinding, and
;; what the default was. Also, it will tell you if the key was rebound after
;; your binding it with `bind-key', and what it was rebound it to.

(require 'easy-mmode)

(defgroup bind-key nil
  "A simple way to manage personal keybindings"
  :group 'emacs)

(defcustom bind-key-segregation-regexp
  "\\`\\(\\(C-[chx] \\|M-[gso] \\)\\([CM]-\\)?\\|.+-\\)"
  "Regular expression used to divide key sets in the output from
  :type 'regexp
  :group 'bind-key)

;; Create override-global-mode to force key remappings

(defvar override-global-map (make-keymap)
  "override-global-mode keymap")

(define-minor-mode override-global-mode
  "A minor mode so that keymap settings override other modes."
  t "" override-global-map)

(add-hook 'after-init-hook
           (lambda ()
             (override-global-mode 1))))

(defvar personal-keybindings nil)

(defmacro bind-key (key-name command &optional keymap)
  (let ((namevar (make-symbol "name"))
        (keyvar (make-symbol "key"))
        (bindingvar (make-symbol "binding"))
        (entryvar (make-symbol "entry")))
    `(let* ((,namevar ,(eval key-name))
            (,keyvar (read-kbd-macro ,namevar))
            (,bindingvar (lookup-key (or ,keymap global-map)
       (let ((,entryvar (assoc (cons ,namevar (quote ,keymap))
         (if ,entryvar
             (setq personal-keybindings
                   (delq ,entryvar personal-keybindings))))
       (setq personal-keybindings
             (cons (list (cons ,namevar (quote ,keymap))
                         (unless (numberp ,bindingvar) ,bindingvar))
       (define-key (or ,keymap global-map) ,keyvar ,command))))

(defmacro unbind-key (key-name &optional keymap)
  `(bind-key ,key-name nil ,keymap))

(defmacro bind-key* (key-name command)
     (bind-key ,key-name ,command)
     (define-key override-global-map ,(read-kbd-macro key-name) ,command)))

(defun get-binding-description (elem)
   ((listp elem)
     ((eq 'lambda (car elem))
     ((eq 'closure (car elem))
     ((eq 'keymap (car elem))
   ((keymapp elem)
   ((symbolp elem)
    "#<byte-compiled lambda>")))

(defun compare-keybindings (l r)
  (let* ((regex bind-key-segregation-regexp)
         (lgroup (and (string-match regex (caar l))
                      (match-string 0 (caar l))))
         (rgroup (and (string-match regex (caar r))
                      (match-string 0 (caar r))))
         (lkeymap (cdar l))
         (rkeymap (cdar r)))
     ((and (null lkeymap) rkeymap)
      (cons t t))
     ((and lkeymap (null rkeymap))
      (cons nil t))
     ((and lkeymap rkeymap
           (not (string= (symbol-name lkeymap) (symbol-name rkeymap))))
      (cons (string< (symbol-name lkeymap) (symbol-name rkeymap)) t))
     ((and (null lgroup) rgroup)
      (cons t t))
     ((and lgroup (null rgroup))
      (cons nil t))
     ((and lgroup rgroup)
      (if (string= lgroup rgroup)
          (cons (string< (caar l) (caar r)) nil)
        (cons (string< lgroup rgroup) t)))
      (cons (string< (caar l) (caar r)) nil)))))

(defun describe-personal-keybindings ()
  (with-current-buffer (get-buffer-create "*Personal Keybindings*")
    (delete-region (point-min) (point-max))
    (insert "Key name Command Comments
----------------- --------------------------------------- ---------------------
    (let (last-binding)
      (dolist (binding
               (setq personal-keybindings
                     (sort personal-keybindings
                           #'(lambda (l r)
                               (car (compare-keybindings l r))))))

        (if (not (eq (cdar last-binding) (cdar binding)))
            (insert ?\n (format "\n%s\n%s\n\n"
                                (cdar binding)
                                (make-string 79 ?-)))
          (if (and last-binding
                   (cdr (compare-keybindings last-binding binding)))
              (insert ?\n)))

        (let* ((key-name (caar binding))
               (at-present (lookup-key (or (symbol-value (cdar binding))
                                       (read-kbd-macro key-name)))
               (command (nth 1 binding))
               (was-command (nth 2 binding))
               (command-desc (get-binding-description command))
               (was-command-desc (and was-command
                                      (get-binding-description was-command)))
               (at-present-desc (get-binding-description at-present))
            key-name command-desc
            (if (string= command-desc at-present-desc)
                (if (or (null was-command)
                        (string= command-desc was-command-desc))
                  (format "(%s)" was-command-desc))
              (format "[now: %s]" at-present)))))

        (setq last-binding binding)))

    (goto-char (point-min))
    (display-buffer (current-buffer))))

(provide 'bind-key)

;;; bind-key.el ends here

Notes et références

  1. « bind-key 1.0 », gnu-emacs-sources, 16 juin 2012.

Lien externe

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