[Emacs-diffs] Changes to emacs/lisp/obsolete/options.el [lexbind]

[Miles Bader]

Index: emacs/lisp/obsolete/options.el
diff -c /dev/null emacs/lisp/obsolete/options.el:1.2.2.1
*** /dev/null   Tue Oct 14 19:52:13 2003
--- emacs/lisp/obsolete/options.el      Tue Oct 14 19:51:32 2003
***************
*** 0 ****
--- 1,148 ----
+ ;;; 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, Inc., 59 Temple Place - Suite 330,
+ ;; Boston, MA 02111-1307, 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.
+ 
+ ;; The customization buffer feature is intended to make this obsolete.
+ 
+ ;;; Code:
+ 
+ ;;;###autoload
+ (defun list-options ()
+   "Display a list of Emacs user options, with values and documentation.
+ It is now better to use Customize instead."
+   (interactive)
+   (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)))
+         (when (boundp sym)
+           (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))))
+       (with-current-buffer "*List Options*"
+       (Edit-options-mode)
+       (setq buffer-read-only t)))))
+ 
+ ;;;###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.
+ 
+ The Custom feature is intended to make this obsolete."
+   (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 "address@hidden")
+   (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 ((buffer-read-only nil) 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)))))
+ 
+ (provide 'options)
+ 
+ ;;; arch-tag: d18211a1-f3fb-48c9-a449-d5acde406a3c
+ ;;; options.el ends here