220 lines
7.7 KiB
EmacsLisp
220 lines
7.7 KiB
EmacsLisp
;;; ja-dic-utl.el --- utilities for handling Japanese dictionary (SKK-JISYO.L) -*- lexical-binding: t; -*-
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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 <https://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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'((?ぁ . ?a) (?あ . ?a) (?ぃ . ?i) (?い . ?i) (?ぅ . ?u)
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(?う . ?u) (?ぇ . ?e) (?え . ?e) (?ぉ . ?o) (?お . ?o)
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(?か . ?k) (?が . ?g) (?き . ?k) (?ぎ . ?g) (?く . ?k)
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(?ぐ . ?g) (?け . ?k) (?げ . ?g) (?こ . ?k) (?ご . ?g)
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(?さ . ?s) (?ざ . ?z) (?し . ?s) (?じ . ?j) (?す . ?s)
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(?ず . ?z) (?せ . ?s) (?ぜ . ?z) (?そ . ?s) (?ぞ . ?z)
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(?た . ?t) (?だ . ?d) (?ち . ?t) (?ぢ . ?d) (?っ . ?t)
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(?つ . ?t) (?づ . ?d) (?て . ?t) (?で . ?d) (?と . ?t) (?ど . ?d)
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(?な . ?n) (?に . ?n) (?ぬ . ?n) (?ね . ?n) (?の . ?n)
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(?は . ?h) (?ば . ?b) (?ぱ . ?p) (?ひ . ?h) (?び . ?b)
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(?ぴ . ?p) (?ふ . ?h) (?ぶ . ?b) (?ぷ . ?p) (?へ . ?h)
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(?べ . ?b) (?ぺ . ?p) (?ほ . ?h) (?ぼ . ?b) (?ぽ . ?p)
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(?ま . ?m) (?み . ?m) (?む . ?m) (?め . ?m) (?も . ?m)
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(?ゃ . ?y) (?や . ?y) (?ゅ . ?y) (?ゆ . ?y) (?ょ . ?y) (?よ . ?y)
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(?ら . ?r) (?り . ?r) (?る . ?r) (?れ . ?r) (?ろ . ?r)
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(?わ . ?w) (?ゐ . ?w) (?ゑ . ?w) (?を . ?w)
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(?ん . ?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 (substitute-command-keys "\
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The library `ja-dic' can't be loaded.
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This might indicate a problem with your Emacs installation, as
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LEIM (Libraries of Emacs Input Method) should normally always be
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installed together with 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 `ー', 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 ?ー)
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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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;;; ja-dic-utl.el ends here
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