1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
;;; options.el --- edit Options command for Emacs
;; Copyright (C) 1985, 2001-2011 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This file has been obsolete since Emacs 22.1.
;; 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)
(princ "This facility is obsolete; we recommend using M-x customize instead.")
(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 "[^\^@-\^?]")
(make-local-variable 'paragraph-start)
(setq paragraph-start "\t")
(setq truncate-lines t)
(setq major-mode 'Edit-options-mode)
(setq mode-name "Options")
(run-mode-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)
;;; options.el ends here
|
