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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 | ||
a2535589 JA |
37 | (defun describe-buffer-case-table () |
38 | "Describe the case table of the current buffer." | |
39 | (interactive) | |
e6905346 RS |
40 | (let ((description (make-char-table 'case-table))) |
41 | (map-char-table | |
42 | (function (lambda (key value) | |
064808ae KH |
43 | (if (consp key) |
44 | (set-char-table-range description key "case-invariant") | |
45 | (aset | |
46 | description key | |
47 | (cond ((not (natnump value)) | |
48 | "case-invariant") | |
49 | ((/= key (downcase key)) | |
50 | (concat "uppercase, matches " | |
51 | (char-to-string (downcase key)))) | |
52 | ((/= key (upcase key)) | |
53 | (concat "lowercase, matches " | |
54 | (char-to-string (upcase key)))) | |
55 | (t "case-invariant")))))) | |
e6905346 | 56 | (current-case-table)) |
4536d484 RS |
57 | (save-excursion |
58 | (with-output-to-temp-buffer "*Help*" | |
59 | (set-buffer standard-output) | |
e6905346 | 60 | (describe-vector description) |
383669af | 61 | (help-mode))))) |
a2535589 | 62 | |
e1e89a70 KH |
63 | (defun get-upcase-table (case-table) |
64 | "Return the upcase table of CASE-TABLE." | |
65 | (or (char-table-extra-slot case-table 0) | |
66 | ;; Setup all extra slots of CASE-TABLE by temporarily selecting | |
67 | ;; it as the standard case table. | |
68 | (let ((old (standard-case-table))) | |
69 | (unwind-protect | |
70 | (progn | |
71 | (set-standard-case-table case-table) | |
72 | (char-table-extra-slot case-table 0)) | |
73 | (or (eq case-table old) | |
74 | (set-standard-case-table old)))))) | |
75 | ||
e6905346 | 76 | (defun copy-case-table (case-table) |
e1e89a70 KH |
77 | (let ((copy (copy-sequence case-table)) |
78 | (up (char-table-extra-slot case-table 0))) | |
79 | ;; Clear out the extra slots (except for upcase table) so that | |
80 | ;; they will be recomputed from the main (downcase) table. | |
81 | (if up | |
82 | (set-char-table-extra-slot copy 0 (copy-sequence up))) | |
e6905346 RS |
83 | (set-char-table-extra-slot copy 1 nil) |
84 | (set-char-table-extra-slot copy 2 nil) | |
85 | copy)) | |
1a7c2dbf | 86 | |
8db3f421 | 87 | (defun set-case-syntax-delims (l r table) |
a2535589 | 88 | "Make characters L and R a matching pair of non-case-converting delimiters. |
8db3f421 RS |
89 | This sets the entries for L and R in TABLE, which is a string |
90 | that will be used as the downcase part of a case table. | |
f46efdf9 | 91 | It also modifies `standard-syntax-table' to |
03131799 | 92 | indicate left and right delimiters." |
8db3f421 RS |
93 | (aset table l l) |
94 | (aset table r r) | |
e1e89a70 KH |
95 | (let ((up (get-upcase-table table))) |
96 | (aset up l l) | |
97 | (aset up r r)) | |
e6905346 | 98 | ;; Clear out the extra slots so that they will be |
e1e89a70 | 99 | ;; recomputed from the main (downcase) table and upcase table. |
e6905346 RS |
100 | (set-char-table-extra-slot table 1 nil) |
101 | (set-char-table-extra-slot table 2 nil) | |
a2535589 JA |
102 | (modify-syntax-entry l (concat "(" (char-to-string r) " ") |
103 | (standard-syntax-table)) | |
a2535589 | 104 | (modify-syntax-entry r (concat ")" (char-to-string l) " ") |
f46efdf9 | 105 | (standard-syntax-table))) |
a2535589 | 106 | |
8db3f421 | 107 | (defun set-case-syntax-pair (uc lc table) |
a2535589 | 108 | "Make characters UC and LC a pair of inter-case-converting letters. |
8db3f421 RS |
109 | This sets the entries for characters UC and LC in TABLE, which is a string |
110 | that will be used as the downcase part of a case table. | |
f46efdf9 RS |
111 | It also modifies `standard-syntax-table' to give them the syntax of |
112 | word constituents." | |
8db3f421 RS |
113 | (aset table uc lc) |
114 | (aset table lc lc) | |
2cf2fc27 RS |
115 | ;; Clear out the extra slots so that they will be |
116 | ;; recomputed from the main (downcase) table. | |
e6905346 RS |
117 | (set-char-table-extra-slot table 0 nil) |
118 | (set-char-table-extra-slot table 1 nil) | |
119 | (set-char-table-extra-slot table 2 nil) | |
a2535589 | 120 | (modify-syntax-entry lc "w " (standard-syntax-table)) |
f46efdf9 | 121 | (modify-syntax-entry uc "w " (standard-syntax-table))) |
a2535589 | 122 | |
8db3f421 | 123 | (defun set-case-syntax (c syntax table) |
1a7c2dbf KH |
124 | "Make character C case-invariant with syntax SYNTAX. |
125 | This sets the entry for character C in TABLE, which is a string | |
8db3f421 | 126 | that will be used as the downcase part of a case table. |
f46efdf9 | 127 | It also modifies `standard-syntax-table'. |
a2535589 | 128 | SYNTAX should be \" \", \"w\", \".\" or \"_\"." |
8db3f421 | 129 | (aset table c c) |
e1e89a70 KH |
130 | (let ((up (get-upcase-table table))) |
131 | (aset up c c)) | |
2cf2fc27 | 132 | ;; Clear out the extra slots so that they will be |
e1e89a70 | 133 | ;; recomputed from the main (downcase) table and upcase table. |
e6905346 RS |
134 | (set-char-table-extra-slot table 1 nil) |
135 | (set-char-table-extra-slot table 2 nil) | |
f46efdf9 | 136 | (modify-syntax-entry c syntax (standard-syntax-table))) |
a2535589 JA |
137 | |
138 | (provide 'case-table) | |
c0274f38 | 139 | |
6b61353c | 140 | ;;; arch-tag: 3c2cf885-2c9a-449a-9972-2e269191896d |
c0274f38 | 141 | ;;; case-table.el ends here |