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[emacs.git] / lisp / makesum.el
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1 ;;; makesum.el --- generate key binding summary for Emacs
3 ;; Copyright (C) 1985 Free Software Foundation, Inc.
5 ;; Maintainer: FSF
6 ;; Keywords: help
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to
22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 ;;; Code:
26 ;;;###autoload
27 (defun make-command-summary ()
28 "Make a summary of current key bindings in the buffer *Summary*.
29 Previous contents of that buffer are killed first."
30 (interactive)
31 (message "Making command summary...")
32 ;; This puts a description of bindings in a buffer called *Help*.
33 (save-window-excursion
34 (describe-bindings))
35 (with-output-to-temp-buffer "*Summary*"
36 (save-excursion
37 (let ((cur-mode mode-name))
38 (set-buffer standard-output)
39 (erase-buffer)
40 (insert-buffer-substring "*Help*")
41 (goto-char (point-min))
42 (delete-region (point) (progn (forward-line 1) (point)))
43 (while (search-forward " " nil t)
44 (replace-match " "))
45 (goto-char (point-min))
46 (while (search-forward "-@ " nil t)
47 (replace-match "-SP"))
48 (goto-char (point-min))
49 (while (search-forward " .. ~ " nil t)
50 (replace-match "SP .. ~"))
51 (goto-char (point-min))
52 (while (search-forward "C-?" nil t)
53 (replace-match "DEL"))
54 (goto-char (point-min))
55 (while (search-forward "C-i" nil t)
56 (replace-match "TAB"))
57 (goto-char (point-min))
58 (if (re-search-forward "^Local Bindings:" nil t)
59 (progn
60 (forward-char -1)
61 (insert " for " cur-mode " Mode")
62 (while (search-forward "??\n" nil t)
63 (delete-region (point)
64 (progn
65 (forward-line -1)
66 (point))))))
67 (goto-char (point-min))
68 (insert "Emacs command summary, " (substring (current-time-string) 0 10)
69 ".\n")
70 ;; Delete "key binding" and underlining of dashes.
71 (delete-region (point) (progn (forward-line 2) (point)))
72 (forward-line 1) ;Skip blank line
73 (while (not (eobp))
74 (let ((beg (point)))
75 (or (re-search-forward "^$" nil t)
76 (goto-char (point-max)))
77 (double-column beg (point))
78 (forward-line 1)))
79 (goto-char (point-min)))))
80 (message "Making command summary...done"))
82 (defun double-column (start end)
83 (interactive "r")
84 (let (half cnt
85 line lines nlines
86 (from-end (- (point-max) end)))
87 (setq nlines (count-lines start end))
88 (if (<= nlines 1)
89 nil
90 (setq half (/ (1+ nlines) 2))
91 (goto-char start)
92 (save-excursion
93 (forward-line half)
94 (while (< half nlines)
95 (setq half (1+ half))
96 (setq line (buffer-substring (point) (save-excursion (end-of-line) (point))))
97 (setq lines (cons line lines))
98 (delete-region (point) (progn (forward-line 1) (point)))))
99 (setq lines (nreverse lines))
100 (while lines
101 (end-of-line)
102 (indent-to 41)
103 (insert (car lines))
104 (forward-line 1)
105 (setq lines (cdr lines))))
106 (goto-char (- (point-max) from-end))))
108 ;;; makesum.el ends here