-;;; case-table.el --- functions for extending the character set and dealing with case tables.
+;;; case-table.el --- code to extend the character set and support case tables
-;; Copyright (C) 1988 Free Software Foundation, Inc.
+;; Copyright (C) 1988, 1994, 2002, 2003, 2004,
+;; 2005, 2006 Free Software Foundation, Inc.
+
+;; Author: Howard Gayle
+;; Maintainer: FSF
+;; Keywords: i18n
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 1, or (at your option)
+;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+;;; Commentary:
;; Written by:
;; TN/ETX/TX/UMG Howard Gayle UUCP : seismo!enea!erix!howard
;; S-126 25 Stockholm FAX : +46 8 719 64 82
;; Sweden
+;;; Code:
+
+(defvar set-case-syntax-offset 0)
+
+(defvar set-case-syntax-set-multibyte nil)
+
(defun describe-buffer-case-table ()
"Describe the case table of the current buffer."
(interactive)
- (let ((vector (make-vector 256 nil))
- (case-table (current-case-table))
- (i 0))
- (while (< i 256)
- (aset vector i
- (cond ((/= ch (downcase ch))
- (concat "uppercase, matches "
- (text-char-description (downcase ch))))
- ((/= ch (upcase ch))
- (concat "lowercase, matches "
- (text-char-description (upcase ch))))
- (t "case-invariant")))
- (setq i (1+ i))))
- (with-output-to-temp-buffer "*Help*"
- (describe-vector vector)))
-
-(defun invert-case (count)
- "Change the case of the character just after point and move over it.
-With prefix arg, applies to that many chars.
-Negative arg inverts characters before point but does not move."
- (interactive "p")
- (if (< count 0)
- (progn (setq count (min (1- (point)) (- count)))
- (forward-char (- count))))
- (while (> count 0)
- (let ((oc (following-char))) ; Old character.
- (cond ((/= (upcase ch) ch)
- (replace-char (upcase ch)))
- ((/= (downcase ch) ch)
- (replace-char (downcase ch)))))
- (forward-char 1)
- (setq count (1- count))))
+ (let ((description (make-char-table 'case-table)))
+ (map-char-table
+ (function (lambda (key value)
+ (aset
+ description key
+ (cond ((not (natnump value))
+ "case-invariant")
+ ((/= key (downcase key))
+ (concat "uppercase, matches "
+ (char-to-string (downcase key))))
+ ((/= key (upcase key))
+ (concat "lowercase, matches "
+ (char-to-string (upcase key))))
+ (t "case-invariant")))))
+ (current-case-table))
+ (save-excursion
+ (with-output-to-temp-buffer "*Help*"
+ (set-buffer standard-output)
+ (describe-vector description)
+ (help-mode)))))
+
+(defun get-upcase-table (case-table)
+ "Return the upcase table of CASE-TABLE."
+ (or (char-table-extra-slot case-table 0)
+ ;; Setup all extra slots of CASE-TABLE by temporarily selecting
+ ;; it as the standard case table.
+ (let ((old (standard-case-table)))
+ (unwind-protect
+ (progn
+ (set-standard-case-table case-table)
+ (char-table-extra-slot case-table 0))
+ (or (eq case-table old)
+ (set-standard-case-table old))))))
+
+(defun copy-case-table (case-table)
+ (let ((copy (copy-sequence case-table))
+ (up (char-table-extra-slot case-table 0)))
+ ;; Clear out the extra slots (except for upcase table) so that
+ ;; they will be recomputed from the main (downcase) table.
+ (if up
+ (set-char-table-extra-slot copy 0 (copy-sequence up)))
+ (set-char-table-extra-slot copy 1 nil)
+ (set-char-table-extra-slot copy 2 nil)
+ copy))
+
+(defsubst set-case-syntax-1 (char)
+ "Offset CHAR by `set-case-syntax-offset' if CHAR is a non-ASCII 8-bit char."
+ (if (and (>= char 128) (< char 256))
+ (+ char set-case-syntax-offset)
+ char))
(defun set-case-syntax-delims (l r table)
"Make characters L and R a matching pair of non-case-converting delimiters.
-Sets the entries for L and R in `standard-case-table', `standard-syntax-table',
-and `text-mode-syntax-table' to indicate left and right delimiters."
- (aset (car table) l l)
- (aset (car table) r r)
+This sets the entries for L and R in TABLE, which is a string
+that will be used as the downcase part of a case table.
+It also modifies `standard-syntax-table' to
+indicate left and right delimiters."
+ (setq l (set-case-syntax-1 l))
+ (setq r (set-case-syntax-1 r))
+ (aset table l l)
+ (aset table r r)
+ (let ((up (get-upcase-table table)))
+ (aset up l l)
+ (aset up r r))
+ ;; Clear out the extra slots so that they will be
+ ;; recomputed from the main (downcase) table and upcase table.
+ (set-char-table-extra-slot table 1 nil)
+ (set-char-table-extra-slot table 2 nil)
(modify-syntax-entry l (concat "(" (char-to-string r) " ")
(standard-syntax-table))
- (modify-syntax-entry l (concat "(" (char-to-string r) " ")
- text-mode-syntax-table)
- (modify-syntax-entry r (concat ")" (char-to-string l) " ")
- (standard-syntax-table))
(modify-syntax-entry r (concat ")" (char-to-string l) " ")
- text-mode-syntax-table))
+ (standard-syntax-table)))
(defun set-case-syntax-pair (uc lc table)
"Make characters UC and LC a pair of inter-case-converting letters.
-Sets the entries for characters UC and LC in `standard-case-table',
-`standard-syntax-table' and `text-mode-syntax-table' to indicate an
-(uppercase, lowercase) pair of letters."
+This sets the entries for characters UC and LC in TABLE, which is a string
+that will be used as the downcase part of a case table.
+It also modifies `standard-syntax-table' to give them the syntax of
+word constituents."
+ (setq uc (set-case-syntax-1 uc))
+ (setq lc (set-case-syntax-1 lc))
+ (aset table uc lc)
+ (aset table lc lc)
+ (let ((up (get-upcase-table table)))
+ (aset up uc uc)
+ (aset up lc uc))
+ ;; Clear out the extra slots so that they will be
+ ;; recomputed from the main (downcase) table and upcase table.
+ (set-char-table-extra-slot table 1 nil)
+ (set-char-table-extra-slot table 2 nil)
+ (modify-syntax-entry lc "w " (standard-syntax-table))
+ (modify-syntax-entry uc "w " (standard-syntax-table)))
+
+(defun set-upcase-syntax (uc lc table)
+ "Make character UC an upcase of character LC.
+It also modifies `standard-syntax-table' to give them the syntax of
+word constituents."
+ (setq uc (set-case-syntax-1 uc))
+ (setq lc (set-case-syntax-1 lc))
+ (aset table lc lc)
+ (let ((up (get-upcase-table table)))
+ (aset up uc uc)
+ (aset up lc uc))
+ ;; Clear out the extra slots so that they will be
+ ;; recomputed from the main (downcase) table and upcase table.
+ (set-char-table-extra-slot table 1 nil)
+ (set-char-table-extra-slot table 2 nil)
+ (modify-syntax-entry lc "w " (standard-syntax-table))
+ (modify-syntax-entry uc "w " (standard-syntax-table)))
- (aset (car table) uc lc)
+(defun set-downcase-syntax (uc lc table)
+ "Make character LC a downcase of character UC.
+It also modifies `standard-syntax-table' to give them the syntax of
+word constituents."
+ (setq uc (set-case-syntax-1 uc))
+ (setq lc (set-case-syntax-1 lc))
+ (aset table uc lc)
+ (aset table lc lc)
+ (let ((up (get-upcase-table table)))
+ (aset up uc uc))
+ ;; Clear out the extra slots so that they will be
+ ;; recomputed from the main (downcase) table and upcase table.
+ (set-char-table-extra-slot table 1 nil)
+ (set-char-table-extra-slot table 2 nil)
(modify-syntax-entry lc "w " (standard-syntax-table))
- (modify-syntax-entry lc "w " text-mode-syntax-table)
- (modify-syntax-entry uc "w " (standard-syntax-table))
- (modify-syntax-entry uc "w " text-mode-syntax-table))
+ (modify-syntax-entry uc "w " (standard-syntax-table)))
(defun set-case-syntax (c syntax table)
- "Make characters C case-invariant with syntax SYNTAX.
-Sets the entries for character C in `standard-case-table',
-`standard-syntax-table' and `text-mode-syntax-table' to indicate this.
+ "Make character C case-invariant with syntax SYNTAX.
+This sets the entry for character C in TABLE, which is a string
+that will be used as the downcase part of a case table.
+It also modifies `standard-syntax-table'.
SYNTAX should be \" \", \"w\", \".\" or \"_\"."
- (aset (car table) c c)
- (modify-syntax-entry c syntax (standard-syntax-table))
- (modify-syntax-entry c syntax text-mode-syntax-table))
+ (setq c (set-case-syntax-1 c))
+ (aset table c c)
+ (let ((up (get-upcase-table table)))
+ (aset up c c))
+ ;; Clear out the extra slots so that they will be
+ ;; recomputed from the main (downcase) table and upcase table.
+ (set-char-table-extra-slot table 1 nil)
+ (set-char-table-extra-slot table 2 nil)
+ (modify-syntax-entry c syntax (standard-syntax-table)))
(provide 'case-table)
+;;; arch-tag: 3c2cf885-2c9a-449a-9972-2e269191896d
;;; case-table.el ends here