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55535639 | 1 | ;;; case-table.el --- code to extend the character set and support case tables |
e5167999 | 2 | |
e1e89a70 | 3 | ;; Copyright (C) 1988, 1994, 2005 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 | |
e1e89a70 KH |
65 | (defun get-upcase-table (case-table) |
66 | "Return the upcase table of CASE-TABLE." | |
67 | (or (char-table-extra-slot case-table 0) | |
68 | ;; Setup all extra slots of CASE-TABLE by temporarily selecting | |
69 | ;; it as the standard case table. | |
70 | (let ((old (standard-case-table))) | |
71 | (unwind-protect | |
72 | (progn | |
73 | (set-standard-case-table case-table) | |
74 | (char-table-extra-slot case-table 0)) | |
75 | (or (eq case-table old) | |
76 | (set-standard-case-table old)))))) | |
77 | ||
e6905346 | 78 | (defun copy-case-table (case-table) |
e1e89a70 KH |
79 | (let ((copy (copy-sequence case-table)) |
80 | (up (char-table-extra-slot case-table 0))) | |
81 | ;; Clear out the extra slots (except for upcase table) so that | |
82 | ;; they will be recomputed from the main (downcase) table. | |
83 | (if up | |
84 | (set-char-table-extra-slot copy 0 (copy-sequence up))) | |
e6905346 RS |
85 | (set-char-table-extra-slot copy 1 nil) |
86 | (set-char-table-extra-slot copy 2 nil) | |
87 | copy)) | |
1a7c2dbf | 88 | |
c9e83877 RS |
89 | (defsubst set-case-syntax-1 (char) |
90 | "Offset CHAR by `set-case-syntax-offset' if CHAR is a non-ASCII 8-bit char." | |
91 | (if (and (>= char 128) (< char 256)) | |
92 | (+ char set-case-syntax-offset) | |
93 | char)) | |
94 | ||
8db3f421 | 95 | (defun set-case-syntax-delims (l r table) |
a2535589 | 96 | "Make characters L and R a matching pair of non-case-converting delimiters. |
8db3f421 RS |
97 | This sets the entries for L and R in TABLE, which is a string |
98 | that will be used as the downcase part of a case table. | |
f46efdf9 | 99 | It also modifies `standard-syntax-table' to |
03131799 | 100 | indicate left and right delimiters." |
c9e83877 RS |
101 | (setq l (set-case-syntax-1 l)) |
102 | (setq r (set-case-syntax-1 r)) | |
8db3f421 RS |
103 | (aset table l l) |
104 | (aset table r r) | |
e1e89a70 KH |
105 | (let ((up (get-upcase-table table))) |
106 | (aset up l l) | |
107 | (aset up r r)) | |
e6905346 | 108 | ;; Clear out the extra slots so that they will be |
e1e89a70 | 109 | ;; recomputed from the main (downcase) table and upcase table. |
e6905346 RS |
110 | (set-char-table-extra-slot table 1 nil) |
111 | (set-char-table-extra-slot table 2 nil) | |
a2535589 JA |
112 | (modify-syntax-entry l (concat "(" (char-to-string r) " ") |
113 | (standard-syntax-table)) | |
a2535589 | 114 | (modify-syntax-entry r (concat ")" (char-to-string l) " ") |
f46efdf9 | 115 | (standard-syntax-table))) |
a2535589 | 116 | |
8db3f421 | 117 | (defun set-case-syntax-pair (uc lc table) |
a2535589 | 118 | "Make characters UC and LC a pair of inter-case-converting letters. |
8db3f421 RS |
119 | This sets the entries for characters UC and LC in TABLE, which is a string |
120 | that will be used as the downcase part of a case table. | |
f46efdf9 RS |
121 | It also modifies `standard-syntax-table' to give them the syntax of |
122 | word constituents." | |
e1e89a70 KH |
123 | (setq uc (set-case-syntax-1 uc)) |
124 | (setq lc (set-case-syntax-1 lc)) | |
125 | (aset table uc lc) | |
126 | (aset table lc lc) | |
127 | (let ((up (get-upcase-table table))) | |
128 | (aset up uc uc) | |
129 | (aset up lc uc)) | |
130 | ;; Clear out the extra slots so that they will be | |
131 | ;; recomputed from the main (downcase) table and upcase table. | |
132 | (set-char-table-extra-slot table 1 nil) | |
133 | (set-char-table-extra-slot table 2 nil) | |
134 | (modify-syntax-entry lc "w " (standard-syntax-table)) | |
135 | (modify-syntax-entry uc "w " (standard-syntax-table))) | |
136 | ||
137 | (defun set-upcase-syntax (uc lc table) | |
138 | "Make character UC an upcase of character LC. | |
139 | It also modifies `standard-syntax-table' to give them the syntax of | |
140 | word constituents." | |
141 | (setq uc (set-case-syntax-1 uc)) | |
142 | (setq lc (set-case-syntax-1 lc)) | |
9afd1c3c | 143 | (aset table lc lc) |
e1e89a70 KH |
144 | (let ((up (get-upcase-table table))) |
145 | (aset up uc uc) | |
146 | (aset up lc uc)) | |
147 | ;; Clear out the extra slots so that they will be | |
148 | ;; recomputed from the main (downcase) table and upcase table. | |
149 | (set-char-table-extra-slot table 1 nil) | |
150 | (set-char-table-extra-slot table 2 nil) | |
151 | (modify-syntax-entry lc "w " (standard-syntax-table)) | |
152 | (modify-syntax-entry uc "w " (standard-syntax-table))) | |
153 | ||
154 | (defun set-downcase-syntax (uc lc table) | |
155 | "Make character LC a downcase of character UC. | |
156 | It also modifies `standard-syntax-table' to give them the syntax of | |
157 | word constituents." | |
c9e83877 RS |
158 | (setq uc (set-case-syntax-1 uc)) |
159 | (setq lc (set-case-syntax-1 lc)) | |
8db3f421 RS |
160 | (aset table uc lc) |
161 | (aset table lc lc) | |
9afd1c3c KH |
162 | (let ((up (get-upcase-table table))) |
163 | (aset up uc uc)) | |
2cf2fc27 | 164 | ;; Clear out the extra slots so that they will be |
e1e89a70 | 165 | ;; recomputed from the main (downcase) table and upcase table. |
e6905346 RS |
166 | (set-char-table-extra-slot table 1 nil) |
167 | (set-char-table-extra-slot table 2 nil) | |
a2535589 | 168 | (modify-syntax-entry lc "w " (standard-syntax-table)) |
f46efdf9 | 169 | (modify-syntax-entry uc "w " (standard-syntax-table))) |
a2535589 | 170 | |
8db3f421 | 171 | (defun set-case-syntax (c syntax table) |
1a7c2dbf KH |
172 | "Make character C case-invariant with syntax SYNTAX. |
173 | This sets the entry for character C in TABLE, which is a string | |
8db3f421 | 174 | that will be used as the downcase part of a case table. |
f46efdf9 | 175 | It also modifies `standard-syntax-table'. |
a2535589 | 176 | SYNTAX should be \" \", \"w\", \".\" or \"_\"." |
c9e83877 | 177 | (setq c (set-case-syntax-1 c)) |
8db3f421 | 178 | (aset table c c) |
e1e89a70 KH |
179 | (let ((up (get-upcase-table table))) |
180 | (aset up c c)) | |
2cf2fc27 | 181 | ;; Clear out the extra slots so that they will be |
e1e89a70 | 182 | ;; recomputed from the main (downcase) table and upcase table. |
e6905346 RS |
183 | (set-char-table-extra-slot table 1 nil) |
184 | (set-char-table-extra-slot table 2 nil) | |
f46efdf9 | 185 | (modify-syntax-entry c syntax (standard-syntax-table))) |
a2535589 JA |
186 | |
187 | (provide 'case-table) | |
c0274f38 | 188 | |
ab5796a9 | 189 | ;;; arch-tag: 3c2cf885-2c9a-449a-9972-2e269191896d |
c0274f38 | 190 | ;;; case-table.el ends here |