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1 | ;; Functions for extending the character set and dealing with case tables. |
2 | ;; Copyright (C) 1988 Free Software Foundation, Inc. | |
3 | ||
4 | ;; This file is part of GNU Emacs. | |
5 | ||
6 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
7 | ;; it under the terms of the GNU General Public License as published by | |
8 | ;; the Free Software Foundation; either version 1, or (at your option) | |
9 | ;; any later version. | |
10 | ||
11 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
12 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;; GNU General Public License for more details. | |
15 | ||
16 | ;; You should have received a copy of the GNU General Public License | |
17 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
18 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | ||
21 | ;; Written by: | |
22 | ;; TN/ETX/TX/UMG Howard Gayle UUCP : seismo!enea!erix!howard | |
23 | ;; Telefonaktiebolaget L M Ericsson Phone: +46 8 719 55 65 | |
24 | ;; Ericsson Telecom Telex: 14910 ERIC S | |
25 | ;; S-126 25 Stockholm FAX : +46 8 719 64 82 | |
26 | ;; Sweden | |
27 | ||
28 | (defun describe-buffer-case-table () | |
29 | "Describe the case table of the current buffer." | |
30 | (interactive) | |
31 | (let ((vector (make-vector 256 nil)) | |
32 | (case-table (current-case-table)) | |
33 | (i 0)) | |
34 | (while (< i 256) | |
35 | (aset vector i | |
36 | (cond ((/= ch (downcase ch)) | |
37 | (concat "uppercase, matches " | |
38 | (text-char-description (downcase ch)))) | |
39 | ((/= ch (upcase ch)) | |
40 | (concat "lowercase, matches " | |
41 | (text-char-description (upcase ch)))) | |
42 | (t "case-invariant"))) | |
43 | (setq i (1+ i)))) | |
44 | (with-output-to-temp-buffer "*Help*" | |
45 | (describe-vector vector))) | |
46 | ||
47 | (defun invert-case (count) | |
48 | "Change the case of the character just after point and move over it. | |
49 | With arg, applies to that many chars. | |
50 | Negative arg inverts characters before point but does not move." | |
51 | (interactive "p") | |
52 | (if (< count 0) | |
53 | (progn (setq count (min (1- (point)) (- count))) | |
54 | (forward-char (- count)))) | |
55 | (while (> count 0) | |
56 | (let ((oc (following-char))) ; Old character. | |
57 | (cond ((/= (upcase ch) ch) | |
58 | (replace-char (upcase ch))) | |
59 | ((/= (downcase ch) ch) | |
60 | (replace-char (downcase ch))))) | |
61 | (forward-char 1) | |
62 | (setq count (1- count)))) | |
63 | ||
64 | (defun set-case-syntax-delims (l r table) | |
65 | "Make characters L and R a matching pair of non-case-converting delimiters. | |
66 | Sets the entries for L and R in standard-case-table, | |
67 | standard-syntax-table, and text-mode-syntax-table to indicate | |
68 | left and right delimiters." | |
69 | (aset (car table) l l) | |
70 | (aset (car table) r r) | |
71 | (modify-syntax-entry l (concat "(" (char-to-string r) " ") | |
72 | (standard-syntax-table)) | |
73 | (modify-syntax-entry l (concat "(" (char-to-string r) " ") | |
74 | text-mode-syntax-table) | |
75 | (modify-syntax-entry r (concat ")" (char-to-string l) " ") | |
76 | (standard-syntax-table)) | |
77 | (modify-syntax-entry r (concat ")" (char-to-string l) " ") | |
78 | text-mode-syntax-table)) | |
79 | ||
80 | (defun set-case-syntax-pair (uc lc table) | |
81 | "Make characters UC and LC a pair of inter-case-converting letters. | |
82 | Sets the entries for characters UC and LC in | |
83 | standard-case-table, standard-syntax-table, and | |
84 | text-mode-syntax-table to indicate an (uppercase, lowercase) | |
85 | pair of letters." | |
86 | (aset (car table) uc lc) | |
87 | (modify-syntax-entry lc "w " (standard-syntax-table)) | |
88 | (modify-syntax-entry lc "w " text-mode-syntax-table) | |
89 | (modify-syntax-entry uc "w " (standard-syntax-table)) | |
90 | (modify-syntax-entry uc "w " text-mode-syntax-table)) | |
91 | ||
92 | (defun set-case-syntax (c syntax table) | |
93 | "Make characters C case-invariant with syntax SYNTAX. | |
94 | Sets the entries for character C in standard-case-table, | |
95 | standard-syntax-table, and text-mode-syntax-table to indicate this. | |
96 | SYNTAX should be \" \", \"w\", \".\" or \"_\"." | |
97 | (aset (car table) c c) | |
98 | (modify-syntax-entry c syntax (standard-syntax-table)) | |
99 | (modify-syntax-entry c syntax text-mode-syntax-table)) | |
100 | ||
101 | (provide 'case-table) |