;;; options.el --- edit Options command for Emacs. ;; Copyright (C) 1985, 1993 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. ;;; Code: ;;;###autoload (defun list-options () "Display a list of Emacs user options, with values and documentation." (interactive) (save-excursion (set-buffer (get-buffer-create (gettext "*List Options*"))) (Edit-options-mode)) (with-output-to-temp-buffer (gettext "*List Options*") (let (vars) (mapatoms #'(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") (if (boundp sym) (prin1 (symbol-value sym)) (princ (gettext "#"))) (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 (gettext "*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 () "\\\ 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 (gettext "Options")) (run-hooks 'Edit-options-mode-hook)) (defun Edit-options-set () (interactive) (Edit-options-modify '(lambda (var) (eval-minibuffer (format (gettext "New %s:") (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