/usr/share/emacs/site-lisp/flim/eword-encode.el is in flim 1:1.14.9+0.20110516-1.
This file is owned by root:root, with mode 0o644.
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;; Copyright (C) 1995,1996,1997,1998,1999,2000,2002,2003,2004 Free
;; Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <tomo@m17n.org>
;; Keywords: encoded-word, MIME, multilingual, header, mail, news
;; This file is part of FLIM (Faithful Library about Internet Message).
;; 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.
;; 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, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Code:
(require 'mime-def)
(require 'mel)
(require 'std11)
(require 'eword-decode)
;;; @ variables
;;;
;; User options are defined in mime-def.el.
(defvar mime-header-charset-encoding-alist
'((us-ascii . nil)
(iso-8859-1 . "Q")
(iso-8859-2 . "Q")
(iso-8859-3 . "Q")
(iso-8859-4 . "Q")
(iso-8859-5 . "Q")
(koi8-r . "Q")
(iso-8859-7 . "Q")
(iso-8859-8 . "Q")
(iso-8859-9 . "Q")
(iso-8859-14 . "Q")
(iso-8859-15 . "Q")
(iso-2022-jp . "B")
(iso-2022-jp-3 . "B")
(iso-2022-kr . "B")
(gb2312 . "B")
(cn-gb . "B")
(cn-gb-2312 . "B")
(euc-kr . "B")
(tis-620 . "B")
(iso-2022-jp-2 . "B")
(iso-2022-int-1 . "B")
(utf-8 . "B")
))
(defvar mime-header-default-charset-encoding "Q")
(defvar mime-header-encode-method-alist
'((eword-encode-address-list
. (Reply-To
From Sender
Resent-Reply-To Resent-From
Resent-Sender To Resent-To
Cc Resent-Cc Bcc Resent-Bcc
Dcc))
(eword-encode-in-reply-to . (In-Reply-To))
(eword-encode-structured-field-body . (Mime-Version User-Agent))
(eword-encode-unstructured-field-body)))
;;; @ encoded-text encoder
;;;
(defun eword-encode-text (charset encoding string &optional mode)
"Encode STRING as an encoded-word, and return the result.
CHARSET is a symbol to indicate MIME charset of the encoded-word.
ENCODING allows \"B\" or \"Q\".
MODE is allows `text', `comment', `phrase' or nil. Default value is
`phrase'."
(let ((text (encoded-text-encode-string string encoding mode)))
(if text
(concat "=?" (upcase (symbol-name charset)) "?"
encoding "?" text "?=")
)))
;;; @ charset word
;;;
(defsubst eword-encode-char-type (character)
(if (memq character '(? ?\t ?\n))
nil
(char-charset character)
))
(defun eword-encode-divide-into-charset-words (string)
(let ((len (length string))
dest)
(while (> len 0)
(let* ((chr (aref string 0))
;; (chr (sref string 0))
(charset (eword-encode-char-type chr))
(i 1)
;; (i (char-length chr))
)
(while (and (< i len)
(setq chr (aref string i))
;; (setq chr (sref string i))
(eq charset (eword-encode-char-type chr)))
(setq i (1+ i))
;; (setq i (char-next-index chr i))
)
(setq dest (cons (cons charset (substring string 0 i)) dest)
string (substring string i)
len (- len i))))
(nreverse dest)))
;;; @ word
;;;
(defun eword-encode-charset-words-to-words (charset-words)
(let (dest)
(while charset-words
(let* ((charset-word (car charset-words))
(charset (car charset-word))
)
(if charset
(let ((charsets (list charset))
(str (cdr charset-word))
)
(catch 'tag
(while (setq charset-words (cdr charset-words))
(setq charset-word (car charset-words)
charset (car charset-word))
(if (null charset)
(throw 'tag nil)
)
(or (memq charset charsets)
(setq charsets (cons charset charsets))
)
(setq str (concat str (cdr charset-word)))
))
(setq dest (cons (cons charsets str) dest))
)
(setq dest (cons charset-word dest)
charset-words (cdr charset-words)
))))
(nreverse dest)
))
;;; @ rule
;;;
(defmacro make-ew-rword (text charset encoding type)
`(list ,text ,charset ,encoding ,type))
(defmacro ew-rword-text (rword)
`(car ,rword))
(defmacro ew-rword-charset (rword)
`(car (cdr ,rword)))
(defmacro ew-rword-encoding (rword)
`(car (cdr (cdr ,rword))))
(defmacro ew-rword-type (rword)
`(car (cdr (cdr (cdr ,rword)))))
(defun ew-find-charset-rule (charsets)
(if charsets
(let* ((charset (find-mime-charset-by-charsets charsets))
(encoding
(cdr (or (assq charset mime-header-charset-encoding-alist)
(cons charset mime-header-default-charset-encoding)))))
(list charset encoding))))
;; [tomo:2002-11-05] The following code is a quick-fix for emacsen
;; which is not depended on the Mule model. We should redesign
;; `eword-encode-split-string' to avoid to depend on the Mule model.
(if (featurep 'utf-2000)
;; for CHISE Architecture
(defun tm-eword::words-to-ruled-words (wl &optional mode)
(let (mcs)
(mapcar (function
(lambda (word)
(setq mcs (detect-mime-charset-string (cdr word)))
(make-ew-rword
(cdr word)
mcs
(cdr (or (assq mcs mime-header-charset-encoding-alist)
(cons mcs mime-header-default-charset-encoding)))
mode)
))
wl)))
;; for legacy Mule
(defun tm-eword::words-to-ruled-words (wl &optional mode)
(mapcar (function
(lambda (word)
(let ((ret (ew-find-charset-rule (car word))))
(make-ew-rword (cdr word) (car ret)(nth 1 ret) mode)
)))
wl))
)
(defun ew-space-process (seq)
(let (prev a ac b c cc)
(while seq
(setq b (car seq))
(setq seq (cdr seq))
(setq c (car seq))
(setq cc (ew-rword-charset c))
(if (and (null (ew-rword-charset b))
(not (eq (ew-rword-type b) 'special)))
(progn
(setq a (car prev))
(setq ac (ew-rword-charset a))
(if (and (ew-rword-encoding a)
(ew-rword-encoding c))
(cond ((eq ac cc)
(setq prev (cons
(cons (concat (car a)(car b)(car c))
(cdr a))
(cdr prev)
))
(setq seq (cdr seq))
)
(t
(setq prev (cons
(cons (concat (car a)(car b))
(cdr a))
(cdr prev)
))
))
(setq prev (cons b prev))
))
(setq prev (cons b prev))
))
(reverse prev)
))
(defun eword-encode-split-string (str &optional mode)
(ew-space-process
(tm-eword::words-to-ruled-words
(eword-encode-charset-words-to-words
(eword-encode-divide-into-charset-words str))
mode)))
;;; @ length
;;;
(defun tm-eword::encoded-word-length (rword)
(let ((string (ew-rword-text rword))
(charset (ew-rword-charset rword))
(encoding (ew-rword-encoding rword))
ret)
(setq ret
(cond ((string-equal encoding "B")
(setq string (encode-mime-charset-string string charset))
(base64-encoded-length string)
)
((string-equal encoding "Q")
(setq string (encode-mime-charset-string string charset))
(Q-encoded-text-length string (ew-rword-type rword))
)))
(if ret
(cons (+ 7 (length (symbol-name charset)) ret) string)
)))
;;; @ encode-string
;;;
(defun ew-encode-rword-1 (column rwl &optional must-output)
(catch 'can-not-output
(let* ((rword (car rwl))
(ret (tm-eword::encoded-word-length rword))
string len)
(if (null ret)
(cond ((and (setq string (car rword))
(or (<= (setq len (+ (length string) column)) 76)
(<= column 1))
)
(setq rwl (cdr rwl))
)
((memq (aref string 0) '(? ?\t))
(setq string (concat "\n" string)
len (length string)
rwl (cdr rwl))
)
(must-output
(setq string "\n "
len 1)
)
(t
(throw 'can-not-output nil)
))
(cond ((and (setq len (car ret))
(<= (+ column len) 76)
)
(setq string
(eword-encode-text
(ew-rword-charset rword)
(ew-rword-encoding rword)
(cdr ret)
(ew-rword-type rword)
))
(setq len (+ (length string) column))
(setq rwl (cdr rwl))
)
(t
(setq string (car rword))
(let* ((p 0) np
(str "") nstr)
(while (and (< p len)
(progn
(setq np (1+ p))
;;(setq np (char-next-index (sref string p) p))
(setq nstr (substring string 0 np))
(setq ret (tm-eword::encoded-word-length
(cons nstr (cdr rword))
))
(setq nstr (cdr ret))
(setq len (+ (car ret) column))
(<= len 76)
))
(setq str nstr
p np))
(if (string-equal str "")
(if must-output
(setq string "\n "
len 1)
(throw 'can-not-output nil))
(setq rwl (cons (cons (substring string p) (cdr rword))
(cdr rwl)))
(setq string
(eword-encode-text
(ew-rword-charset rword)
(ew-rword-encoding rword)
str
(ew-rword-type rword)))
(setq len (+ (length string) column))
)
)))
)
(list string len rwl)
)))
(defun eword-encode-rword-list (column rwl)
(let (ret dest str ew-f pew-f folded-points)
(while rwl
(setq ew-f (nth 2 (car rwl)))
(if (and pew-f ew-f)
(setq rwl (cons '(" ") rwl)
pew-f nil)
(setq pew-f ew-f)
)
(if (null (setq ret (ew-encode-rword-1 column rwl)))
(let ((i (1- (length dest)))
c s r-dest r-column)
(catch 'success
(while (catch 'found
(while (>= i 0)
(cond ((memq (setq c (aref dest i)) '(? ?\t))
(if (memq i folded-points)
(throw 'found nil)
(setq folded-points (cons i folded-points))
(throw 'found i))
)
((eq c ?\n)
(throw 'found nil)
))
(setq i (1- i))))
(setq s (substring dest i)
r-column (length s)
r-dest (concat (substring dest 0 i) "\n" s))
(when (setq ret (ew-encode-rword-1 r-column rwl))
(setq dest r-dest
column r-column)
(throw 'success t)
))
(setq ret (ew-encode-rword-1 column rwl 'must-output))
)))
(setq str (car ret))
(setq dest (concat dest str))
(setq column (nth 1 ret)
rwl (nth 2 ret))
)
(list dest column)
))
;;; @ converter
;;;
(defun eword-encode-phrase-to-rword-list (phrase)
(let (token type dest str)
(while phrase
(setq token (car phrase))
(setq type (car token))
(cond ((eq type 'quoted-string)
(setq str (concat "\"" (cdr token) "\""))
(setq dest
(append dest
(list
(let ((ret (ew-find-charset-rule
(find-charset-string str))))
(make-ew-rword
str (car ret)(nth 1 ret) 'phrase)
)
)))
)
((eq type 'comment)
(setq dest
(append dest
'(("(" nil nil special))
(tm-eword::words-to-ruled-words
(eword-encode-charset-words-to-words
(eword-encode-divide-into-charset-words
(cdr token)))
'comment)
'((")" nil nil special))
))
)
(t
(setq dest
(append dest
(tm-eword::words-to-ruled-words
(eword-encode-charset-words-to-words
(eword-encode-divide-into-charset-words
(cdr token))
) 'phrase)))
))
(setq phrase (cdr phrase))
)
(ew-space-process dest)
))
(defun eword-encode-addr-seq-to-rword-list (seq)
(let (dest pname)
(while seq
(let* ((token (car seq))
(name (car token))
)
(cond ((eq name 'spaces)
(setq dest (nconc dest (list (list (cdr token) nil nil))))
)
((eq name 'comment)
(setq dest
(nconc
dest
(list (list "(" nil nil))
(eword-encode-split-string (cdr token) 'comment)
(list (list ")" nil nil))
))
)
((eq name 'quoted-string)
(setq dest
(nconc
dest
(list
(list (concat "\"" (cdr token) "\"") nil nil)
)))
)
(t
(setq dest
(if (or (eq pname 'spaces)
(eq pname 'comment))
(nconc dest (list (list (cdr token) nil nil)))
(nconc (nreverse (cdr (reverse dest)))
;; (butlast dest)
(list
(list (concat (car (car (last dest)))
(cdr token))
nil nil)))))
))
(setq seq (cdr seq)
pname name))
)
dest))
(defun eword-encode-phrase-route-addr-to-rword-list (phrase-route-addr)
(if (eq (car phrase-route-addr) 'phrase-route-addr)
(let ((phrase (nth 1 phrase-route-addr))
(route (nth 2 phrase-route-addr))
dest)
;; (if (eq (car (car phrase)) 'spaces)
;; (setq phrase (cdr phrase))
;; )
(setq dest (eword-encode-phrase-to-rword-list phrase))
(if dest
(setq dest (append dest '((" " nil nil))))
)
(append
dest
(eword-encode-addr-seq-to-rword-list
(append '((specials . "<"))
route
'((specials . ">"))))
))))
(defun eword-encode-addr-spec-to-rword-list (addr-spec)
(if (eq (car addr-spec) 'addr-spec)
(eword-encode-addr-seq-to-rword-list (cdr addr-spec))
))
(defun eword-encode-mailbox-to-rword-list (mbox)
(let ((addr (nth 1 mbox))
(comment (nth 2 mbox))
dest)
(setq dest (or (eword-encode-phrase-route-addr-to-rword-list addr)
(eword-encode-addr-spec-to-rword-list addr)
))
(if comment
(setq dest
(append dest
'((" " nil nil)
("(" nil nil))
(eword-encode-split-string comment 'comment)
(list '(")" nil nil))
)))
dest))
(defsubst eword-encode-mailboxes-to-rword-list (mboxes)
(let ((dest (eword-encode-mailbox-to-rword-list (car mboxes))))
(if dest
(while (setq mboxes (cdr mboxes))
(setq dest
(nconc dest
(list '("," nil nil))
(eword-encode-mailbox-to-rword-list
(car mboxes))))))
dest))
(defsubst eword-encode-address-to-rword-list (address)
(cond
((eq (car address) 'mailbox)
(eword-encode-mailbox-to-rword-list address))
((eq (car address) 'group)
(nconc
(eword-encode-phrase-to-rword-list (nth 1 address))
(list (list ":" nil nil))
(eword-encode-mailboxes-to-rword-list (nth 2 address))
(list (list ";" nil nil))))))
(defsubst eword-encode-addresses-to-rword-list (addresses)
(let ((dest (eword-encode-address-to-rword-list (car addresses))))
(if dest
(while (setq addresses (cdr addresses))
(setq dest
(nconc dest
(list '("," nil nil))
;; (list '(" " nil nil))
(eword-encode-address-to-rword-list (car addresses))))))
dest))
(defsubst eword-encode-msg-id-to-rword-list (msg-id)
(list
(list
(concat "<"
(caar (eword-encode-addr-seq-to-rword-list (cdr msg-id)))
">")
nil nil)))
(defsubst eword-encode-in-reply-to-to-rword-list (in-reply-to)
(let (dest)
(while in-reply-to
(setq dest
(append dest
(let ((elt (car in-reply-to)))
(if (eq (car elt) 'phrase)
(eword-encode-phrase-to-rword-list (cdr elt))
(eword-encode-msg-id-to-rword-list elt)
))))
(setq in-reply-to (cdr in-reply-to)))
dest))
;;; @ application interfaces
;;;
(defvar eword-encode-default-start-column 10
"Default start column if it is omitted.")
(defun eword-encode-string (string &optional column mode)
"Encode STRING as encoded-words, and return the result.
Optional argument COLUMN is start-position of the field.
Optional argument MODE allows `text', `comment', `phrase' or nil.
Default value is `phrase'."
(car (eword-encode-rword-list
(or column eword-encode-default-start-column)
(eword-encode-split-string string mode))))
(defun eword-encode-address-list (string &optional column)
"Encode header field STRING as list of address, and return the result.
Optional argument COLUMN is start-position of the field."
(car (eword-encode-rword-list
(or column eword-encode-default-start-column)
(eword-encode-addresses-to-rword-list
(std11-parse-addresses-string string))
)))
(defun eword-encode-in-reply-to (string &optional column)
"Encode header field STRING as In-Reply-To field, and return the result.
Optional argument COLUMN is start-position of the field."
(car (eword-encode-rword-list
(or column 13)
(eword-encode-in-reply-to-to-rword-list
(std11-parse-msg-ids-string string)))))
(defun eword-encode-structured-field-body (string &optional column)
"Encode header field STRING as structured field, and return the result.
Optional argument COLUMN is start-position of the field."
(car (eword-encode-rword-list
(or column eword-encode-default-start-column)
(eword-encode-addr-seq-to-rword-list (std11-lexical-analyze string))
)))
(defun eword-encode-unstructured-field-body (string &optional column)
"Encode header field STRING as unstructured field, and return the result.
Optional argument COLUMN is start-position of the field."
(car (eword-encode-rword-list
(or column eword-encode-default-start-column)
(eword-encode-split-string string 'text))))
;;;###autoload
(defun mime-encode-field-body (field-body field-name)
"Encode FIELD-BODY as FIELD-NAME, and return the result.
A lexical token includes non-ASCII character is encoded as MIME
encoded-word. ASCII token is not encoded."
(setq field-body (std11-unfold-string field-body))
(if (string= field-body "")
""
(let ((method-alist mime-header-encode-method-alist)
start ret)
(if (symbolp field-name)
(setq start (1+ (length (symbol-name field-name))))
(setq start (1+ (length field-name))
field-name (intern (capitalize field-name))))
(while (car method-alist)
(if (or (not (cdr (car method-alist)))
(memq field-name
(cdr (car method-alist))))
(progn
(setq ret
(apply (caar method-alist) (list field-body start)))
(setq method-alist nil)))
(setq method-alist (cdr method-alist)))
ret)))
(defalias 'eword-encode-field-body 'mime-encode-field-body)
(make-obsolete 'eword-encode-field-body 'mime-encode-field-body)
(defun eword-in-subject-p ()
(let ((str (std11-field-body "Subject")))
(if (and str (string-match eword-encoded-word-regexp str))
str)))
(make-obsolete 'eword-in-subject-p "Don't use it.")
(defsubst eword-find-field-encoding-method (field-name)
(setq field-name (downcase field-name))
(let ((alist mime-field-encoding-method-alist))
(catch 'found
(while alist
(let* ((pair (car alist))
(str (car pair)))
(if (and (stringp str)
(string= field-name (downcase str)))
(throw 'found (cdr pair))
))
(setq alist (cdr alist)))
(cdr (assq t mime-field-encoding-method-alist))
)))
;;;###autoload
(defun mime-encode-header-in-buffer (&optional code-conversion)
"Encode header fields to network representation, such as MIME encoded-word.
It refers the `mime-field-encoding-method-alist' variable."
(interactive "*")
(save-excursion
(save-restriction
(std11-narrow-to-header mail-header-separator)
(goto-char (point-min))
(let ((default-cs (mime-charset-to-coding-system default-mime-charset))
bbeg end field-name)
(while (re-search-forward std11-field-head-regexp nil t)
(setq bbeg (match-end 0)
field-name (buffer-substring-no-properties (match-beginning 0)
(1- bbeg))
end (std11-field-end))
(and (delq 'ascii (find-charset-region bbeg end))
(let ((method (eword-find-field-encoding-method
(downcase field-name))))
(cond ((eq method 'mime)
(let* ((field-body
(buffer-substring-no-properties bbeg end))
(encoded-body
(mime-encode-field-body
field-body field-name)))
(if (not encoded-body)
(error "Cannot encode %s:%s"
field-name field-body)
(delete-region bbeg end)
(insert encoded-body))))
(code-conversion
(let ((cs
(or (mime-charset-to-coding-system
method)
default-cs)))
(encode-coding-region bbeg end cs)))))))))))
(defalias 'eword-encode-header 'mime-encode-header-in-buffer)
(make-obsolete 'eword-encode-header 'mime-encode-header-in-buffer)
;;; @ end
;;;
(provide 'eword-encode)
;;; eword-encode.el ends here
|