--- /dev/null
+;;; mule-category.el --- category functions for XEmacs/Mule.
+
+;; Copyright (C) 1992,93,94,95 Free Software Foundation, Inc.
+;; Copyright (C) 1995 Amdahl Corporation.
+;; Copyright (C) 1995 Sun Microsystems.
+
+;; This file is part of XEmacs.
+
+;; XEmacs 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 2, or (at your option)
+;; any later version.
+
+;; XEmacs is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with XEmacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; Functions for working with category tables, which are a particular
+;; type of char table. Some function names / arguments should be
+;; parallel with syntax tables.
+
+;; Written by Ben Wing <wing@666.com>. The initialization code
+;; at the end of this file comes from Mule.
+;; Some bugfixes by Jareth Hein <jhod@po.iijnet.or.jp>
+
+;;; Code:
+
+(defvar defined-category-hashtable (make-hashtable 50))
+
+(defun define-category (designator doc-string)
+ "Make a new category whose designator is DESIGNATOR.
+DESIGNATOR should be a visible letter of ' ' thru '~'.
+STRING is a doc string for the category.
+Letters of 'a' thru 'z' are already used or kept for the system."
+ (check-argument-type 'category-designator-p designator)
+ (check-argument-type 'stringp doc-string)
+ (puthash designator doc-string defined-category-hashtable))
+
+(defun undefine-category (designator)
+ "Undefine DESIGNATOR as a designator for a category."
+ (check-argument-type 'category-designator-p designator)
+ (remhash designator defined-category-hashtable))
+
+(defun defined-category-p (designator)
+ "Return non-nil if DESIGNATOR is a designator for a defined category."
+ (and (category-designator-p designator)
+ (gethash designator defined-category-hashtable)))
+
+(defun defined-category-list ()
+ "Return a list of the currently defined categories.
+Categories are given by their designators."
+ (let (list)
+ (maphash #'(lambda (key value)
+ (setq list (cons key list)))
+ defined-category-hashtable)
+ (nreverse list)))
+
+(defun undefined-category-designator ()
+ "Return an undefined category designator, or nil if there are none."
+ (let ((a 32) found)
+ (while (and (< a 127) (not found))
+ (if (gethash a defined-category-hashtable)
+ (setq found a))
+ (setq a (1+ a)))
+ found))
+
+(defun category-doc-string (designator)
+ "Return the doc-string for the category denoted by DESIGNATOR."
+ (check-argument-type 'defined-category-p designator)
+ (gethash designator defined-category-hashtable))
+
+(defun modify-category-entry (char-range designator &optional table reset)
+ "Add a category to the categories associated with CHAR-RANGE.
+CHAR-RANGE is a single character or a range of characters,
+ as per `put-char-table'.
+The category is given by a designator character.
+The changes are made in TABLE, which defaults to the current buffer's
+ category table.
+If optional fourth argument RESET is non-nil, previous categories associated
+ with CHAR-RANGE are removed before adding the specified category."
+ (or table (setq table (category-table)))
+ (check-argument-type 'category-table-p table)
+ (check-argument-type 'defined-category-p designator)
+ (if reset
+ ;; clear all existing stuff.
+ (put-char-table char-range nil table))
+ (map-char-table
+ #'(lambda (key value)
+ ;; make sure that this range has a bit-vector assigned to it
+ (if (not (bit-vector-p value))
+ (setq value (make-bit-vector 95 0))
+ (setq value (copy-sequence value)))
+ ;; set the appropriate bit in that vector.
+ (aset value (- designator 32) 1)
+ ;; put the vector back, thus assuring we have a unique setting for this range
+ (put-char-table key value table))
+ table char-range))
+
+(defun char-category-list (char &optional table)
+ "Return a list of the categories that CHAR is in.
+TABLE defaults to the current buffer's category table.
+The categories are given by their designators."
+ (or table (setq table (category-table)))
+ (check-argument-type 'category-table-p table)
+ (let ((vec (get-char-table char table)))
+ (if (null vec) nil
+ (let ((a 32) list)
+ (while (< a 127)
+ (if (= 1 (aref vec (- a 32)))
+ (setq list (cons a list)))
+ (setq a (1+ a)))
+ (nreverse list)))))
+
+;; implimented in c, file chartab.c (97/3/14 jhod@po.iijnet.or.jp)
+;(defun char-in-category-p (char category &optional table)
+; "Return non-nil if CHAR is in CATEGORY.
+;TABLE defaults to the current buffer's category table.
+;Categories are specified by their designators."
+; (or table (setq table (category-table)))
+; (check-argument-type 'category-table-p table)
+; (check-argument-type 'category-designator-p category)
+; (let ((vec (get-char-table char table)))
+; (if (null vec) nil
+; (= 1 (aref vec (- category 32))))))
+
+(defun describe-category ()
+ "Describe the category specifications in the category table.
+The descriptions are inserted in a buffer, which is then displayed."
+ (interactive)
+ (with-output-to-temp-buffer "*Help*"
+ (describe-category-table (category-table) standard-output)))
+
+(defun describe-category-table (table stream)
+ (let (first-char
+ last-char
+ prev-val
+ (describe-one
+ (lambda (first last value stream)
+ (if (and (bit-vector-p value)
+ (> (reduce '+ value) 0))
+ (progn
+ (if (equal first last)
+ (cond ((vectorp first)
+ (princ (format "%s, row %d"
+ (charset-name
+ (aref first 0))
+ (aref first 1))
+ stream))
+ ((charsetp first)
+ (princ (charset-name first) stream))
+ (t (princ first stream)))
+ (cond ((vectorp first)
+ (princ (format "%s, rows %d .. %d"
+ (charset-name
+ (aref first 0))
+ (aref first 1)
+ (aref last 1))
+ stream))
+ (t
+ (princ (format "%s .. %s" first last)
+ stream))))
+ (describe-category-code value stream))))))
+ (map-char-table
+ (lambda (range value)
+ (if (and (or
+ (and (characterp range)
+ (characterp first-char)
+ (eq (char-charset range) (char-charset first-char))
+ (= (char-to-int last-char) (1- (char-to-int range))))
+ (and (vectorp range)
+ (vectorp first-char)
+ (eq (aref range 0) (aref first-char 0))
+ (= (aref last-char 1) (1- (aref range 1))))
+ (equal value prev-val)))
+ (setq last-char range)
+ (if first-char
+ (progn
+ (funcall describe-one first-char last-char prev-val stream)
+ (setq first-char nil)))
+ (funcall describe-one range range value stream))
+ nil)
+ table)
+ (if first-char
+ (funcall describe-one first-char last-char prev-val stream))))
+
+(defun describe-category-code (code stream)
+ (let ((standard-output (or stream standard-output)))
+ (princ "\tin categories: ")
+ (if (not (bit-vector-p code))
+ (princ "(none)")
+ (let ((i 0)
+ already-matched)
+ (while (< i 95)
+ (if (= 1 (aref code i))
+ (progn
+ (if (not already-matched)
+ (setq already-matched t)
+ (princ " "))
+ (princ (int-to-char (+ 32 i)))))
+ (setq i (1+ i)))
+ (if (not already-matched)
+ (princ "(none)")))
+ (let ((i 0))
+ (while (< i 95)
+ (if (= 1 (aref code i))
+ (princ (format "\n\t\tmeaning: %s"
+ (category-doc-string (int-to-char (+ 32 i))))))
+ (setq i (1+ i)))))
+ (terpri)))
+
+(defconst predefined-category-list
+ '((latin-iso8859-1 ?l "Latin-1 through Latin-5 character set")
+ (latin-iso8859-2 ?l)
+ (latin-iso8859-3 ?l)
+ (latin-iso8859-4 ?l)
+ (latin-iso8859-9 ?l)
+ (cyrillic-iso8859-5 ?y "Cyrillic character set")
+ (arabic-iso8859-6 ?b "Arabic character set")
+ (greek-iso8859-7 ?g "Greek character set")
+ (hebrew-iso8859-8 ?w "Hebrew character set")
+ (katakana-jisx0201 ?k "Japanese 1-byte Katakana character set")
+ (latin-jisx0201 ?r "Japanese 1-byte Roman character set")
+ (japanese-jisx0208-1978 ?j "Japanese 2-byte character set (old)")
+ (japanese-jisx0208 ?j "Japanese 2-byte character set")
+ (japanese-jisx0212 ?j)
+ (chinese-gb2312 ?c "Chinese GB (China, PRC) 2-byte character set")
+ (chinese-cns11643-1 ?t "Chinese Taiwan (CNS or Big5) 2-byte character set")
+ (chinese-cns11643-2 ?t)
+ (chinese-big5-1 ?t)
+ (chinese-big5-2 ?t)
+ (korean-ksc5601 ?h "Hangul (Korean) 2-byte character set")
+ )
+ "List of predefined categories.
+Each element is a list of a charset, a designator, and maybe a doc string.")
+
+(let (i l)
+ (define-category ?a "ASCII character set.")
+ (setq i 32)
+ (while (< i 127)
+ (modify-category-entry i ?a)
+ (setq i (1+ i)))
+ (setq l predefined-category-list)
+ (while l
+ (if (and (nth 2 (car l))
+ (not (defined-category-p (nth 2 (car l)))))
+ (define-category (nth 1 (car l)) (nth 2 (car l))))
+ (modify-category-entry (car (car l)) (nth 1 (car l)))
+ (setq l (cdr l))))
+
+;;; At the present, I know Japanese and Chinese text can
+;;; break line at any point under a restriction of 'kinsoku'.
+(defvar word-across-newline "\\(\\cj\\|\\cc\\|\\ct\\)"
+ "Regular expression of such characters which can be a word across newline.")
+
+(defvar ascii-char "[\40-\176]")
+(defvar ascii-space "[ \t]")
+(defvar ascii-symbols "[\40-\57\72-\100\133-\140\173-\176]")
+(defvar ascii-numeric "[\60-\71]")
+(defvar ascii-English-Upper "[\101-\132]")
+(defvar ascii-English-Lower "[\141-\172]")
+(defvar ascii-alphanumeric "[\60-\71\101-\132\141-\172]")
+
+(defvar kanji-char "\\cj")
+(defvar kanji-space "\e$B!!\e(B")
+(defvar kanji-symbols "\\cS")
+(defvar kanji-numeric "[\e$B#0\e(B-\e$B#9\e(B]")
+(defvar kanji-English-Upper "[\e$B#A\e(B-\e$B#Z\e(B]")
+(defvar kanji-English-Lower "[\e$B#a\e(B-\e$B#z\e(B]")
+(defvar kanji-hiragana "\\cH")
+(defvar kanji-katakana "\\cK")
+(defvar kanji-Greek-Upper "[\e$B&!\e(B-\e$B&8\e(B]")
+(defvar kanji-Greek-Lower "[\e$B&A\e(B-\e$B&X\e(B]")
+(defvar kanji-Russian-Upper "[\e$B'!\e(B-\e$B'A\e(B]")
+(defvar kanji-Russian-Lower "[\e$B'Q\e(B-\e$B'q\e(B]")
+(defvar kanji-Kanji-1st-Level "[\e$B0!\e(B-\e$BOS\e(B]")
+(defvar kanji-Kanji-2nd-Level "[\e$BP!\e(B-\e$Bt$\e(B]")
+
+(defvar kanji-kanji-char "\\(\\cH\\|\\cK\\|\\cC\\)")
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