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226 lines
8.2 KiB
EmacsLisp
226 lines
8.2 KiB
EmacsLisp
;;; ja-dic-utl.el --- utilities for handling Japanese dictionary (SKK-JISYO.L)
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;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008, 2009, 2010, 2011
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;; National Institute of Advanced Industrial Science and Technology (AIST)
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;; Registration Number H14PRO021
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;; Keywords: i18n, mule, multilingual, Japanese
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file provides a generic function to look up a Japanese
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;; dictionary of SKK format.
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;;
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;; SKK is a free Japanese input method running on Mule created by
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;; Masahiko Sato <masahiko@sato.riec.tohoku.ac.jp>. The Emacs Lisp
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;; library kkc.el provides a facility to convert a Japanese kana
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;; string to a kanji-kana-mixed string by using SKK's dictionary.
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;;
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;; The original SKK dictionary SKK-JISYO.L is converted to ja-dic.el
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;; by ja-dic-cnv.el. We get entries of the dictionary in four
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;; variables (listed below) by loading that file (or byte-compiled
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;; version ja-dic.elc).
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;;; Code:
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;; The following four variables are set by loading ja-dic.el[c].
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(defvar skkdic-okuri-ari nil
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"Nested alist for OKURI-ARI entries of SKK dictionary.")
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(defvar skkdic-postfix nil
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"Nested alist for SETSUBIJI (postfix) entries of SKK dictionary.")
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(defvar skkdic-prefix nil
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"Nested alist SETTOUJI (prefix) entries of SKK dictionary.")
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(defvar skkdic-okuri-nasi nil
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"Nested alist for OKURI-NASI entries of SKK dictionary.")
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(defconst skkdic-okurigana-table
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'((?$B$!(B . ?a) (?$B$"(B . ?a) (?$B$#(B . ?i) (?$B$$(B . ?i) (?$B$%(B . ?u)
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(?$B$&(B . ?u) (?$B$'(B . ?e) (?$B$((B . ?e) (?$B$)(B . ?o) (?$B$*(B . ?o)
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(?$B$+(B . ?k) (?$B$,(B . ?g) (?$B$-(B . ?k) (?$B$.(B . ?g) (?$B$/(B . ?k)
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(?$B$0(B . ?g) (?$B$1(B . ?k) (?$B$2(B . ?g) (?$B$3(B . ?k) (?$B$4(B . ?g)
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(?$B$5(B . ?s) (?$B$6(B . ?z) (?$B$7(B . ?s) (?$B$8(B . ?j) (?$B$9(B . ?s)
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(?$B$:(B . ?z) (?$B$;(B . ?s) (?$B$<(B . ?z) (?$B$=(B . ?s) (?$B$>(B . ?z)
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(?$B$?(B . ?t) (?$B$@(B . ?d) (?$B$A(B . ?t) (?$B$B(B . ?d) (?$B$C(B . ?t)
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(?$B$D(B . ?t) (?$B$E(B . ?d) (?$B$F(B . ?t) (?$B$G(B . ?d) (?$B$H(B . ?t) (?$B$I(B . ?d)
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(?$B$J(B . ?n) (?$B$K(B . ?n) (?$B$L(B . ?n) (?$B$M(B . ?n) (?$B$N(B . ?n)
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(?$B$O(B . ?h) (?$B$P(B . ?b) (?$B$Q(B . ?p) (?$B$R(B . ?h) (?$B$S(B . ?b)
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(?$B$T(B . ?p) (?$B$U(B . ?h) (?$B$V(B . ?b) (?$B$W(B . ?p) (?$B$X(B . ?h)
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(?$B$Y(B . ?b) (?$B$Z(B . ?p) (?$B$[(B . ?h) (?$B$\(B . ?b) (?$B$](B . ?p)
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(?$B$^(B . ?m) (?$B$_(B . ?m) (?$B$`(B . ?m) (?$B$a(B . ?m) (?$B$b(B . ?m)
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(?$B$c(B . ?y) (?$B$d(B . ?y) (?$B$e(B . ?y) (?$B$f(B . ?y) (?$B$g(B . ?y) (?$B$h(B . ?y)
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(?$B$i(B . ?r) (?$B$j(B . ?r) (?$B$k(B . ?r) (?$B$l(B . ?r) (?$B$m(B . ?r)
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(?$B$o(B . ?w) (?$B$p(B . ?w) (?$B$q(B . ?w) (?$B$r(B . ?w)
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(?$B$s(B . ?n)
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)
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"Alist of Okuriganas vs trailing ASCII letters in OKURI-ARI entry.")
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(defun skkdic-merge-head-and-tail (heads tails postfix)
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(let ((min-len 2)
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l)
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(while heads
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(if (or (not postfix)
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(>= (length (car heads)) min-len))
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(let ((tail tails))
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(while tail
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(if (or postfix
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(>= (length (car tail)) min-len))
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(setq l (cons (concat (car heads) (car tail)) l)))
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(setq tail (cdr tail)))))
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(setq heads (cdr heads)))
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l))
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(defconst skkdic-jisx0208-hiragana-block
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(cons (decode-char 'japanese-jisx0208 #x2421)
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(decode-char 'japanese-jisx0208 #x247E)))
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(defun skkdic-lookup-key (seq len &optional postfix prefer-noun)
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"Return a list of conversion string for sequence SEQ of length LEN.
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SEQ is a vector of Kana characters to be converted by SKK dictionary.
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If LEN is shorter than the length of KEYSEQ, the first LEN keys in SEQ
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are took into account.
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Optional 3rd arg POSTFIX non-nil means SETSUBIJI (postfix) are also
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considered to find conversion strings.
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Optional 4th arg PREFER-NOUN non-nil means that the conversions
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without okurigana are placed at the head of the returned list."
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(or skkdic-okuri-nasi
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(condition-case err
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(load-library "ja-dic/ja-dic")
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(error (ding)
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(with-output-to-temp-buffer "*Help*"
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(princ "The library `ja-dic' can't be loaded.
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The most common case is that you have not yet installed the library
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included in LEIM (Libraries of Emacs Input Method) which is
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distributed separately from Emacs.
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LEIM is available from the same ftp directory as Emacs."))
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(signal (car err) (cdr err)))))
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(let ((vec (make-vector len 0))
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(i 0)
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entry)
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;; At first, generate vector VEC from SEQ for looking up SKK
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;; alists. Nth element in VEC corresponds to Nth element in SEQ.
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;; The values are decided as follows.
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;; If SEQ[N] is `$B!<(B', VEC[N] is 0,
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;; else if SEQ[N] is a Hiragana character, VEC[N] is:
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;; ((The 2nd position code of SEQ[N]) - 32),
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;; else VEC[N] is 128.
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(while (< i len)
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(let ((ch (aref seq i))
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code)
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(cond ((= ch ?$B!<(B)
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(aset vec i 0))
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((and (>= ch (car skkdic-jisx0208-hiragana-block))
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(<= ch (cdr skkdic-jisx0208-hiragana-block)))
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(setq code (encode-char ch 'japanese-jisx0208))
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(if code
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(aset vec i (- (logand code #xFF) 32))
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(aset vec i 128)))
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(t
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(aset vec i 128))))
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(setq i (1+ i)))
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;; Search OKURI-NASI entries.
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(setq entry (lookup-nested-alist vec skkdic-okuri-nasi len 0 t))
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(if (consp (car entry))
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(setq entry (copy-sequence (car entry)))
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(setq entry nil))
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(if postfix
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;; Search OKURI-NASI entries with postfixes.
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(let ((break (max (- len (car skkdic-postfix)) 1))
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entry-head entry-postfix entry2)
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(while (< break len)
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(if (and (setq entry-head
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(lookup-nested-alist vec skkdic-okuri-nasi
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break 0 t))
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(consp (car entry-head))
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(setq entry-postfix
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(lookup-nested-alist vec skkdic-postfix
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len break t))
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(consp (car entry-postfix))
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(setq entry2 (skkdic-merge-head-and-tail
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(car entry-head) (car entry-postfix) t)))
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(if entry
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(nconc entry entry2)
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(setq entry entry2)))
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(setq break (1+ break)))))
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;; Search OKURI-NASI entries with prefixes.
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(let ((break (min (car skkdic-prefix) (- len 2)))
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entry-prefix entry-tail entry2)
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(while (> break 0)
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(if (and (setq entry-prefix
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(lookup-nested-alist vec skkdic-prefix break 0 t))
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(consp (car entry-prefix))
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(setq entry-tail
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(lookup-nested-alist vec skkdic-okuri-nasi len break t))
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(consp (car entry-tail))
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(setq entry2 (skkdic-merge-head-and-tail
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(car entry-prefix) (car entry-tail) nil)))
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(progn
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(if entry
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(nconc entry entry2)
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(setq entry entry2))))
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(setq break (1- break))))
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;; Search OKURI-ARI entries.
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(let ((okurigana (assq (aref seq (1- len)) skkdic-okurigana-table))
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orig-element entry2)
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(if okurigana
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(progn
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(setq orig-element (aref vec (1- len)))
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(aset vec (1- len) (- (cdr okurigana)))
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(if (and (setq entry2 (lookup-nested-alist vec skkdic-okuri-ari
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len 0 t))
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(consp (car entry2)))
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(progn
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(setq entry2 (copy-sequence (car entry2)))
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(let ((l entry2)
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(okuri (char-to-string (aref seq (1- len)))))
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(while l
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(setcar l (concat (car l) okuri))
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(setq l (cdr l)))
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(if entry
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(if prefer-noun
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(nconc entry entry2)
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(setq entry2 (nreverse entry2))
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(nconc entry2 entry)
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(setq entry entry2))
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(setq entry (nreverse entry2))))))
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(aset vec (1- len) orig-element))))
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entry))
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;;
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(provide 'ja-dic-utl)
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;; Local Variables:
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;; coding: iso-2022-7bit
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;; End:
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;;; ja-dic-utl.el ends here
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