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stardict.el
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stardict.el
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;;; stardict.el --- stardict dictionary library
;; Copyright (C) 2010 Changyuan Yu
;; Author: Changyuan Yu <rei.vzy@gmail.com>
;; Created: 2010-11-06
;; Version: 0.1
;; Keywords: stardict
;; This file is *NOT* part of GNU Emacs
;; This program 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.
;; This program 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.
;; A copy of the GNU General Public License can be obtained from this
;; program's author (send electronic mail to andyetitmoves@gmail.com)
;; or from the Free Software Foundation, Inc.,
;; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
;;; Commentary:
;;
;; Example:
;;
;; (require 'stardict)
;; (setq dict
;; (stardict-open "~/.stardict/dic/stardict-lazyworm-ec-2.4.2"
;; "lazyworm-ec"))
;; (stardict-word-exist-p dict "apple")
;; (stardict-lookup dict "apple")
;; (stardict-open-dict-file dict)
;; (mapcar (lambda (x) (stardict-lookup dict x)) (make-list 1000 "apple"))
;;; Code:
(defun stardict-str2int (str)
"Convert string `STR' to integer.
\x21\x22 => 0x2122"
(let ((sum 0))
(mapc (lambda (c)
(setq sum (+ (* sum #x100)
(mod c #x100))))
str)
sum))
(defun stardict-open (dir name &optional nocache)
"Open stardict dictionary in directory `DIR' with name `NAME'.
When `NOCACHE' is not nil, don't load from cache and save to cache.
The return is used as `DICT' argument in other functions."
(if nocache (stardict-open-1 dir name)
(let ((cache (expand-file-name (concat name ".idx.emacs.bz2") dir)) ret)
(if (file-exists-p cache)
(with-temp-buffer
(insert-file-contents cache)
(read (current-buffer)))
(setq ret (stardict-open-1 dir name))
(with-temp-buffer
(prin1 ret (current-buffer))
(write-region nil nil cache))
ret))))
(defun stardict-open-1 (dir name)
"Internal function used by `stardict-open'.
`DIR' is dictionary location, `NAME' is dictionary name."
(let ((ifo (expand-file-name (concat name ".ifo") dir))
(idx (expand-file-name (concat name ".idx") dir))
(dict (expand-file-name (concat name ".dict") dir))
(idx-offset-bytes 4)
(word-count 0)
ifo-ht idx-ht)
(unless (file-exists-p idx)
(setq idx (concat idx ".gz")))
(unless (file-exists-p dict)
(setq dict (concat dict ".dz")))
;;(message "List %S" (list idx dict ifo))
(unless (and (file-exists-p idx)
(file-exists-p dict)
(file-exists-p ifo))
(error "File not found"))
(setq ifo-ht (make-hash-table :test 'equal))
(setq idx-ht (make-hash-table :test 'equal))
;; get info
(with-temp-buffer
(insert-file-contents ifo)
(goto-char (point-min))
(while (re-search-forward "^\\([a-zA-Z]+\\)=\\(.*\\)$" nil t)
(puthash (match-string 1) (match-string 2) ifo-ht)))
(when (gethash "idxoffsetbits" ifo-ht)
(setq idx-offset-bytes
(/ (string-to-number (gethash "idxoffsetbits" ifo-ht)) 8)))
(setq word-count
(string-to-number (gethash "wordcount" ifo-ht)))
;; get index
(with-temp-buffer
(insert-file-contents idx)
(goto-char (point-min))
(let ((rpt (make-progress-reporter "read index: " 0 (1- word-count))))
(dotimes (i word-count)
(progress-reporter-update rpt i)
(let (p word offset size)
(re-search-forward "\\([^\x00]+?\\)\x00" nil t)
(setq p (point))
(setq word (decode-coding-string (encode-coding-string (match-string 1) 'no-conversion) 'utf-8))
(setq offset
(stardict-str2int
(buffer-substring-no-properties p
(+ p idx-offset-bytes))))
(setq size
(stardict-str2int
(buffer-substring-no-properties (+ p idx-offset-bytes)
(+ p idx-offset-bytes 4))))
(forward-char (+ idx-offset-bytes 4))
(puthash word (cons offset size) idx-ht)
)))
(list ifo-ht idx-ht dict))))
(defun stardict-word-exist-p (dict word)
"Checkout whether `WORD' existed in `DICT'."
(gethash word (nth 1 dict)))
(defun stardict-lookup (dict word)
"Lookup `WORD' in `DICT', return nil when not found."
(let ((info (gethash word (nth 1 dict)))
(file (nth 2 dict))
buffer
offset size begin end)
(when info
(setq offset (car info))
(setq size (cdr info))
;; find any opened dict file
(dolist (buf (buffer-list))
(when (equal file (buffer-file-name buf))
(setq buffer buf)))
(if buffer
(with-current-buffer buffer
(buffer-substring-no-properties (byte-to-position (1+ offset))
(byte-to-position (+ 1 offset size))))
(with-temp-buffer
(insert-file-contents (nth 2 dict) nil offset (+ offset size))
(buffer-string))))))
(defun stardict-open-dict-file (dict)
"Open dict file of `DICT' in Emacs to speed up word lookup.
You should close the dict file yourself."
(with-current-buffer (find-file-noselect (nth 2 dict))
(setq buffer-read-only t)))
;; added by myself
(defvar stardict-dir nil)
(defvar stardict-name nil)
(defvar stardict-dict-hash nil)
(defun stardict--load-dict ()
"load dictionary when call for first time."
(unless stardict-dict-hash
(setq stardict-dict-hash
(stardict-open stardict-dir stardict-name))))
(defun stardict--lookup-and-display (word)
(with-current-buffer (get-buffer-create "*stardict*")
(erase-buffer)
(insert (concat word "\n"))
(insert (stardict-lookup stardict-dict-hash (string-trim (downcase word))))
(goto-char (point-min))
(switch-to-buffer (current-buffer))))
(defun stardict-define-at-point ()
"Define the word at point."
(interactive)
(stardict--load-dict)
(let ((word (thing-at-point 'word)))
;; if word is not in dictionary, try to truncate
(unless (stardict-word-exist-p stardict-dict-hash word)
(let ((trunc-char
(cond
((string-match "^.*ed$" word) -2)
((string-match "^.*ing$" word) -3)
((string-match "^.*es$" word) -2)
((string-match "^.*'s$" word) -2)
((string-match "^.*s$" word) -1))))
(if trunc-char
(setq word (substring word 0 trunc-char))
(setq word nil))))
(if word
(stardict--lookup-and-display word)
(message "No definition is found!"))))
(defun stardict-define (word)
"Prompt for `WORD' and define it."
(interactive "sWord: ")
(stardict--load-dict)
(if (stardict-word-exist-p stardict-dict-hash word)
(stardict--lookup-and-display word)
(message "No definition is found!")))
(provide 'stardict)
;;; stardict.el ends here