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55535639 | 1 | ;;; case-table.el --- code to extend the character set and support case tables |
e5167999 | 2 | |
e91081eb | 3 | ;; Copyright (C) 1988, 1994, 2001, 2002, 2003, 2004, |
409cc4a3 | 4 | ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
3a801d0c | 5 | |
e5167999 ER |
6 | ;; Author: Howard Gayle |
7 | ;; Maintainer: FSF | |
a1d15b3e | 8 | ;; Keywords: i18n |
a2535589 JA |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
b4aa6026 | 14 | ;; the Free Software Foundation; either version 3, or (at your option) |
a2535589 JA |
15 | ;; any later version. |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
b578f267 | 23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
086add15 LK |
24 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
25 | ;; Boston, MA 02110-1301, USA. | |
a2535589 | 26 | |
e5167999 | 27 | ;;; Commentary: |
a2535589 JA |
28 | |
29 | ;; Written by: | |
30 | ;; TN/ETX/TX/UMG Howard Gayle UUCP : seismo!enea!erix!howard | |
31 | ;; Telefonaktiebolaget L M Ericsson Phone: +46 8 719 55 65 | |
32 | ;; Ericsson Telecom Telex: 14910 ERIC S | |
33 | ;; S-126 25 Stockholm FAX : +46 8 719 64 82 | |
34 | ;; Sweden | |
35 | ||
e5167999 ER |
36 | ;;; Code: |
37 | ||
a2535589 JA |
38 | (defun describe-buffer-case-table () |
39 | "Describe the case table of the current buffer." | |
40 | (interactive) | |
e6905346 RS |
41 | (let ((description (make-char-table 'case-table))) |
42 | (map-char-table | |
43 | (function (lambda (key value) | |
064808ae KH |
44 | (if (consp key) |
45 | (set-char-table-range description key "case-invariant") | |
46 | (aset | |
47 | description key | |
48 | (cond ((not (natnump value)) | |
49 | "case-invariant") | |
50 | ((/= key (downcase key)) | |
51 | (concat "uppercase, matches " | |
52 | (char-to-string (downcase key)))) | |
53 | ((/= key (upcase key)) | |
54 | (concat "lowercase, matches " | |
55 | (char-to-string (upcase key)))) | |
56 | (t "case-invariant")))))) | |
e6905346 | 57 | (current-case-table)) |
4536d484 RS |
58 | (save-excursion |
59 | (with-output-to-temp-buffer "*Help*" | |
60 | (set-buffer standard-output) | |
e6905346 | 61 | (describe-vector description) |
383669af | 62 | (help-mode))))) |
a2535589 | 63 | |
e1e89a70 KH |
64 | (defun get-upcase-table (case-table) |
65 | "Return the upcase table of CASE-TABLE." | |
66 | (or (char-table-extra-slot case-table 0) | |
67 | ;; Setup all extra slots of CASE-TABLE by temporarily selecting | |
68 | ;; it as the standard case table. | |
69 | (let ((old (standard-case-table))) | |
70 | (unwind-protect | |
71 | (progn | |
72 | (set-standard-case-table case-table) | |
73 | (char-table-extra-slot case-table 0)) | |
74 | (or (eq case-table old) | |
75 | (set-standard-case-table old)))))) | |
76 | ||
e6905346 | 77 | (defun copy-case-table (case-table) |
e1e89a70 KH |
78 | (let ((copy (copy-sequence case-table)) |
79 | (up (char-table-extra-slot case-table 0))) | |
80 | ;; Clear out the extra slots (except for upcase table) so that | |
81 | ;; they will be recomputed from the main (downcase) table. | |
82 | (if up | |
83 | (set-char-table-extra-slot copy 0 (copy-sequence up))) | |
e6905346 RS |
84 | (set-char-table-extra-slot copy 1 nil) |
85 | (set-char-table-extra-slot copy 2 nil) | |
86 | copy)) | |
1a7c2dbf | 87 | |
8db3f421 | 88 | (defun set-case-syntax-delims (l r table) |
a2535589 | 89 | "Make characters L and R a matching pair of non-case-converting delimiters. |
8db3f421 RS |
90 | This sets the entries for L and R in TABLE, which is a string |
91 | that will be used as the downcase part of a case table. | |
f46efdf9 | 92 | It also modifies `standard-syntax-table' to |
03131799 | 93 | indicate left and right delimiters." |
8db3f421 RS |
94 | (aset table l l) |
95 | (aset table r r) | |
e1e89a70 KH |
96 | (let ((up (get-upcase-table table))) |
97 | (aset up l l) | |
98 | (aset up r r)) | |
e6905346 | 99 | ;; Clear out the extra slots so that they will be |
e1e89a70 | 100 | ;; recomputed from the main (downcase) table and upcase table. |
e6905346 RS |
101 | (set-char-table-extra-slot table 1 nil) |
102 | (set-char-table-extra-slot table 2 nil) | |
a2535589 JA |
103 | (modify-syntax-entry l (concat "(" (char-to-string r) " ") |
104 | (standard-syntax-table)) | |
a2535589 | 105 | (modify-syntax-entry r (concat ")" (char-to-string l) " ") |
f46efdf9 | 106 | (standard-syntax-table))) |
a2535589 | 107 | |
8db3f421 | 108 | (defun set-case-syntax-pair (uc lc table) |
a2535589 | 109 | "Make characters UC and LC a pair of inter-case-converting letters. |
8db3f421 RS |
110 | This sets the entries for characters UC and LC in TABLE, which is a string |
111 | that will be used as the downcase part of a case table. | |
f46efdf9 RS |
112 | It also modifies `standard-syntax-table' to give them the syntax of |
113 | word constituents." | |
8db3f421 RS |
114 | (aset table uc lc) |
115 | (aset table lc lc) | |
2e46e874 KH |
116 | (let ((up (get-upcase-table table))) |
117 | (aset up uc uc) | |
118 | (aset up lc uc)) | |
2cf2fc27 | 119 | ;; Clear out the extra slots so that they will be |
2e46e874 KH |
120 | ;; recomputed from the main (downcase) table and upcase table. |
121 | (set-char-table-extra-slot table 1 nil) | |
122 | (set-char-table-extra-slot table 2 nil) | |
123 | (modify-syntax-entry lc "w " (standard-syntax-table)) | |
124 | (modify-syntax-entry uc "w " (standard-syntax-table))) | |
125 | ||
126 | (defun set-upcase-syntax (uc lc table) | |
127 | "Make character UC an upcase of character LC. | |
128 | It also modifies `standard-syntax-table' to give them the syntax of | |
129 | word constituents." | |
130 | (aset table lc lc) | |
131 | (let ((up (get-upcase-table table))) | |
132 | (aset up uc uc) | |
133 | (aset up lc uc)) | |
134 | ;; Clear out the extra slots so that they will be | |
135 | ;; recomputed from the main (downcase) table and upcase table. | |
136 | (set-char-table-extra-slot table 1 nil) | |
137 | (set-char-table-extra-slot table 2 nil) | |
138 | (modify-syntax-entry lc "w " (standard-syntax-table)) | |
139 | (modify-syntax-entry uc "w " (standard-syntax-table))) | |
140 | ||
141 | (defun set-downcase-syntax (uc lc table) | |
142 | "Make character LC a downcase of character UC. | |
143 | It also modifies `standard-syntax-table' to give them the syntax of | |
144 | word constituents." | |
145 | (aset table uc lc) | |
146 | (aset table lc lc) | |
147 | (let ((up (get-upcase-table table))) | |
148 | (aset up uc uc)) | |
149 | ;; Clear out the extra slots so that they will be | |
150 | ;; recomputed from the main (downcase) table and upcase table. | |
e6905346 RS |
151 | (set-char-table-extra-slot table 1 nil) |
152 | (set-char-table-extra-slot table 2 nil) | |
a2535589 | 153 | (modify-syntax-entry lc "w " (standard-syntax-table)) |
f46efdf9 | 154 | (modify-syntax-entry uc "w " (standard-syntax-table))) |
a2535589 | 155 | |
8db3f421 | 156 | (defun set-case-syntax (c syntax table) |
1a7c2dbf KH |
157 | "Make character C case-invariant with syntax SYNTAX. |
158 | This sets the entry for character C in TABLE, which is a string | |
8db3f421 | 159 | that will be used as the downcase part of a case table. |
f46efdf9 | 160 | It also modifies `standard-syntax-table'. |
a2535589 | 161 | SYNTAX should be \" \", \"w\", \".\" or \"_\"." |
8db3f421 | 162 | (aset table c c) |
e1e89a70 KH |
163 | (let ((up (get-upcase-table table))) |
164 | (aset up c c)) | |
2cf2fc27 | 165 | ;; Clear out the extra slots so that they will be |
e1e89a70 | 166 | ;; recomputed from the main (downcase) table and upcase table. |
e6905346 RS |
167 | (set-char-table-extra-slot table 1 nil) |
168 | (set-char-table-extra-slot table 2 nil) | |
f46efdf9 | 169 | (modify-syntax-entry c syntax (standard-syntax-table))) |
a2535589 JA |
170 | |
171 | (provide 'case-table) | |
c0274f38 | 172 | |
cbee283d | 173 | ;; arch-tag: 3c2cf885-2c9a-449a-9972-2e269191896d |
c0274f38 | 174 | ;;; case-table.el ends here |