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c8472948 | 1 | ;;; case-table.el --- code to extend the character set and support case tables. |
e5167999 | 2 | |
8f1204db | 3 | ;; Copyright (C) 1988, 1994 Free Software Foundation, Inc. |
3a801d0c | 4 | |
e5167999 ER |
5 | ;; Author: Howard Gayle |
6 | ;; Maintainer: FSF | |
a1d15b3e | 7 | ;; Keywords: i18n |
a2535589 JA |
8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
a2535589 JA |
14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
a2535589 | 25 | |
e5167999 | 26 | ;;; Commentary: |
a2535589 JA |
27 | |
28 | ;; Written by: | |
29 | ;; TN/ETX/TX/UMG Howard Gayle UUCP : seismo!enea!erix!howard | |
30 | ;; Telefonaktiebolaget L M Ericsson Phone: +46 8 719 55 65 | |
31 | ;; Ericsson Telecom Telex: 14910 ERIC S | |
32 | ;; S-126 25 Stockholm FAX : +46 8 719 64 82 | |
33 | ;; Sweden | |
34 | ||
e5167999 ER |
35 | ;;; Code: |
36 | ||
cc1cdd74 RS |
37 | (defvar set-case-syntax-offset 0) |
38 | ||
40f30b63 RS |
39 | (defvar set-case-syntax-set-multibyte nil) |
40 | ||
a2535589 JA |
41 | (defun describe-buffer-case-table () |
42 | "Describe the case table of the current buffer." | |
43 | (interactive) | |
e6905346 RS |
44 | (let ((description (make-char-table 'case-table))) |
45 | (map-char-table | |
46 | (function (lambda (key value) | |
adfb70a1 | 47 | (aset |
e6905346 | 48 | description key |
adfb70a1 | 49 | (cond ((not (natnump value)) |
e6905346 RS |
50 | "case-invariant") |
51 | ((/= key (downcase key)) | |
52 | (concat "uppercase, matches " | |
53 | (char-to-string (downcase key)))) | |
54 | ((/= key (upcase key)) | |
55 | (concat "lowercase, matches " | |
56 | (char-to-string (upcase key)))) | |
57 | (t "case-invariant"))))) | |
58 | (current-case-table)) | |
4536d484 RS |
59 | (save-excursion |
60 | (with-output-to-temp-buffer "*Help*" | |
61 | (set-buffer standard-output) | |
e6905346 | 62 | (describe-vector description) |
383669af | 63 | (help-mode))))) |
a2535589 | 64 | |
e6905346 RS |
65 | (defun copy-case-table (case-table) |
66 | (let ((copy (copy-sequence case-table))) | |
67 | ;; Clear out the extra slots so that they will be | |
68 | ;; recomputed from the main (downcase) table. | |
69 | (set-char-table-extra-slot copy 0 nil) | |
70 | (set-char-table-extra-slot copy 1 nil) | |
71 | (set-char-table-extra-slot copy 2 nil) | |
72 | copy)) | |
1a7c2dbf | 73 | |
c9e83877 RS |
74 | (defsubst set-case-syntax-1 (char) |
75 | "Offset CHAR by `set-case-syntax-offset' if CHAR is a non-ASCII 8-bit char." | |
76 | (if (and (>= char 128) (< char 256)) | |
77 | (+ char set-case-syntax-offset) | |
78 | char)) | |
79 | ||
8db3f421 | 80 | (defun set-case-syntax-delims (l r table) |
a2535589 | 81 | "Make characters L and R a matching pair of non-case-converting delimiters. |
8db3f421 RS |
82 | This sets the entries for L and R in TABLE, which is a string |
83 | that will be used as the downcase part of a case table. | |
f46efdf9 | 84 | It also modifies `standard-syntax-table' to |
03131799 | 85 | indicate left and right delimiters." |
c9e83877 RS |
86 | (setq l (set-case-syntax-1 l)) |
87 | (setq r (set-case-syntax-1 r)) | |
8db3f421 RS |
88 | (aset table l l) |
89 | (aset table r r) | |
e6905346 RS |
90 | ;; Clear out the extra slots so that they will be |
91 | ;; recomputed from the main (downcase) table. | |
92 | (set-char-table-extra-slot table 0 nil) | |
93 | (set-char-table-extra-slot table 1 nil) | |
94 | (set-char-table-extra-slot table 2 nil) | |
a2535589 JA |
95 | (modify-syntax-entry l (concat "(" (char-to-string r) " ") |
96 | (standard-syntax-table)) | |
a2535589 | 97 | (modify-syntax-entry r (concat ")" (char-to-string l) " ") |
f46efdf9 | 98 | (standard-syntax-table))) |
a2535589 | 99 | |
8db3f421 | 100 | (defun set-case-syntax-pair (uc lc table) |
a2535589 | 101 | "Make characters UC and LC a pair of inter-case-converting letters. |
8db3f421 RS |
102 | This sets the entries for characters UC and LC in TABLE, which is a string |
103 | that will be used as the downcase part of a case table. | |
f46efdf9 RS |
104 | It also modifies `standard-syntax-table' to give them the syntax of |
105 | word constituents." | |
c9e83877 RS |
106 | (setq uc (set-case-syntax-1 uc)) |
107 | (setq lc (set-case-syntax-1 lc)) | |
8db3f421 RS |
108 | (aset table uc lc) |
109 | (aset table lc lc) | |
e6905346 RS |
110 | (set-char-table-extra-slot table 0 nil) |
111 | (set-char-table-extra-slot table 1 nil) | |
112 | (set-char-table-extra-slot table 2 nil) | |
a2535589 | 113 | (modify-syntax-entry lc "w " (standard-syntax-table)) |
f46efdf9 | 114 | (modify-syntax-entry uc "w " (standard-syntax-table))) |
a2535589 | 115 | |
8db3f421 | 116 | (defun set-case-syntax (c syntax table) |
1a7c2dbf KH |
117 | "Make character C case-invariant with syntax SYNTAX. |
118 | This sets the entry for character C in TABLE, which is a string | |
8db3f421 | 119 | that will be used as the downcase part of a case table. |
f46efdf9 | 120 | It also modifies `standard-syntax-table'. |
a2535589 | 121 | SYNTAX should be \" \", \"w\", \".\" or \"_\"." |
c9e83877 | 122 | (setq c (set-case-syntax-1 c)) |
8db3f421 | 123 | (aset table c c) |
e6905346 RS |
124 | (set-char-table-extra-slot table 0 nil) |
125 | (set-char-table-extra-slot table 1 nil) | |
126 | (set-char-table-extra-slot table 2 nil) | |
f46efdf9 | 127 | (modify-syntax-entry c syntax (standard-syntax-table))) |
a2535589 JA |
128 | |
129 | (provide 'case-table) | |
c0274f38 ER |
130 | |
131 | ;;; case-table.el ends here |