mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-25 07:28:20 +00:00
139 lines
4.6 KiB
EmacsLisp
139 lines
4.6 KiB
EmacsLisp
;;; options.el --- edit Options command for Emacs.
|
|
|
|
;; Copyright (C) 1985 Free Software Foundation, Inc.
|
|
|
|
;; Maintainer: FSF
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs 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.
|
|
|
|
;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
|
|
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
;;; Commentary:
|
|
|
|
;; This code provides functions to list and edit the values of all global
|
|
;; option variables known to loaded Emacs Lisp code. There are two entry
|
|
;; points, `list-options' and `edit' options'. The latter enters a major
|
|
;; mode specifically for editing option values. Do `M-x describe-mode' in
|
|
;; that context for more details.
|
|
|
|
;;; Code:
|
|
|
|
;;;###autoload
|
|
(defun list-options ()
|
|
"Display a list of Emacs user options, with values and documentation."
|
|
(interactive)
|
|
(save-excursion
|
|
(set-buffer (get-buffer-create "*List Options*"))
|
|
(Edit-options-mode))
|
|
(with-output-to-temp-buffer "*List Options*"
|
|
(let (vars)
|
|
(mapatoms (function (lambda (sym)
|
|
(if (user-variable-p sym)
|
|
(setq vars (cons sym vars))))))
|
|
(setq vars (sort vars 'string-lessp))
|
|
(while vars
|
|
(let ((sym (car vars)))
|
|
(princ ";; ")
|
|
(prin1 sym)
|
|
(princ ":\n\t")
|
|
(prin1 (symbol-value sym))
|
|
(terpri)
|
|
(princ (substitute-command-keys
|
|
(documentation-property sym 'variable-documentation)))
|
|
(princ "\n;;\n"))
|
|
(setq vars (cdr vars))))))
|
|
|
|
;;;###autoload
|
|
(defun edit-options ()
|
|
"Edit a list of Emacs user option values.
|
|
Selects a buffer containing such a list,
|
|
in which there are commands to set the option values.
|
|
Type \\[describe-mode] in that buffer for a list of commands."
|
|
(interactive)
|
|
(list-options)
|
|
(pop-to-buffer "*List Options*"))
|
|
|
|
(defvar Edit-options-mode-map
|
|
(let ((map (make-keymap)))
|
|
(define-key map "s" 'Edit-options-set)
|
|
(define-key map "x" 'Edit-options-toggle)
|
|
(define-key map "1" 'Edit-options-t)
|
|
(define-key map "0" 'Edit-options-nil)
|
|
(define-key map "p" 'backward-paragraph)
|
|
(define-key map " " 'forward-paragraph)
|
|
(define-key map "n" 'forward-paragraph)
|
|
map)
|
|
"")
|
|
|
|
;; Edit Options mode is suitable only for specially formatted data.
|
|
(put 'Edit-options-mode 'mode-class 'special)
|
|
|
|
(defun Edit-options-mode ()
|
|
"\\<Edit-options-mode-map>\
|
|
Major mode for editing Emacs user option settings.
|
|
Special commands are:
|
|
\\[Edit-options-set] -- set variable point points at. New value read using minibuffer.
|
|
\\[Edit-options-toggle] -- toggle variable, t -> nil, nil -> t.
|
|
\\[Edit-options-t] -- set variable to t.
|
|
\\[Edit-options-nil] -- set variable to nil.
|
|
Changed values made by these commands take effect immediately.
|
|
|
|
Each variable description is a paragraph.
|
|
For convenience, the characters \\[backward-paragraph] and \\[forward-paragraph] move back and forward by paragraphs."
|
|
(kill-all-local-variables)
|
|
(set-syntax-table emacs-lisp-mode-syntax-table)
|
|
(use-local-map Edit-options-mode-map)
|
|
(make-local-variable 'paragraph-separate)
|
|
(setq paragraph-separate "[^\^@-\^?]")
|
|
(make-local-variable 'paragraph-start)
|
|
(setq paragraph-start "^\t")
|
|
(setq truncate-lines t)
|
|
(setq major-mode 'Edit-options-mode)
|
|
(setq mode-name "Options")
|
|
(run-hooks 'Edit-options-mode-hook))
|
|
|
|
(defun Edit-options-set () (interactive)
|
|
(Edit-options-modify
|
|
'(lambda (var) (eval-minibuffer (concat "New " (symbol-name var) ": ")))))
|
|
|
|
(defun Edit-options-toggle () (interactive)
|
|
(Edit-options-modify '(lambda (var) (not (symbol-value var)))))
|
|
|
|
(defun Edit-options-t () (interactive)
|
|
(Edit-options-modify '(lambda (var) t)))
|
|
|
|
(defun Edit-options-nil () (interactive)
|
|
(Edit-options-modify '(lambda (var) nil)))
|
|
|
|
(defun Edit-options-modify (modfun)
|
|
(save-excursion
|
|
(let (var pos)
|
|
(re-search-backward "^;; \\|\\`")
|
|
(forward-char 3)
|
|
(setq pos (point))
|
|
(save-restriction
|
|
(narrow-to-region pos (progn (end-of-line) (1- (point))))
|
|
(goto-char pos)
|
|
(setq var (read (current-buffer))))
|
|
(goto-char pos)
|
|
(forward-line 1)
|
|
(forward-char 1)
|
|
(save-excursion
|
|
(set var (funcall modfun var)))
|
|
(kill-sexp 1)
|
|
(prin1 (symbol-value var) (current-buffer)))))
|
|
|
|
;;; options.el ends here
|