;; Author: ENAMI Tsugutomo <enami@sys.ptg.sony.co.jp>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
-;; Tanaka Akira <akr@jaist.ac.jp>
-;; Maintainer: Tanaka Akira <akr@jaist.ac.jp>
+;; TANAKA Akira <akr@jaist.ac.jp>
;; Created: 1995/10/03
;; Original: 1992/07/20 ENAMI Tsugutomo's `mime.el'.
-;; Renamed: 1993/06/03 to tiny-mime.el
-;; Renamed: 1995/10/03 from tiny-mime.el (split off encoder)
-;; Renamed: 1997/02/22 from tm-ew-d.el
+;; Renamed: 1993/06/03 to tiny-mime.el by MORIOKA Tomohiko
+;; Renamed: 1995/10/03 to tm-ew-d.el (split off encoder)
+;; by MORIOKA Tomohiko
+;; Renamed: 1997/02/22 from tm-ew-d.el by MORIOKA Tomohiko
;; Keywords: encoded-word, MIME, multilingual, header, mail, news
-;; This file is part of FLAM (Faithful Library About MIME).
+;; 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
(require 'mel)
(require 'mime-def)
+(eval-when-compile (require 'cl))
+
(defgroup eword-decode nil
"Encoded-word decoding"
:group 'mime)
-
-;;; @ variables
-;;;
-
-(defcustom eword-decode-sticked-encoded-word nil
- "*If non-nil, decode encoded-words sticked on atoms,
-other encoded-words, etc.
-however this behaviour violates RFC2047."
- :group 'eword-decode
- :type 'boolean)
-
-(defcustom eword-decode-quoted-encoded-word nil
- "*If non-nil, decode encoded-words in quoted-string
-however this behaviour violates RFC2047."
+(defcustom eword-max-size-to-decode 1000
+ "*Max size to decode header field."
:group 'eword-decode
- :type 'boolean)
+ :type '(choice (integer :tag "Limit (bytes)")
+ (const :tag "Don't limit" nil)))
;;; @ MIME encoded-word definition
;;;
-(defconst eword-encoded-word-prefix-regexp
- (concat (regexp-quote "=?")
- "\\(" mime-charset-regexp "\\)"
- (regexp-quote "?")
- "\\(B\\|Q\\)"
- (regexp-quote "?")))
-(defconst eword-encoded-word-suffix-regexp
- (regexp-quote "?="))
-
-(defconst eword-encoded-text-in-unstructured-regexp "[!->@-~]+")
-(defconst eword-encoded-word-in-unstructured-regexp
- (concat eword-encoded-word-prefix-regexp
- "\\(" eword-encoded-text-in-unstructured-regexp "\\)"
- eword-encoded-word-suffix-regexp))
-(defconst eword-after-encoded-word-in-unstructured-regexp "\\([ \t]\\|$\\)")
-
-(defconst eword-encoded-text-in-phrase-regexp "[-A-Za-z0-9!*+/=_]+")
-(defconst eword-encoded-word-in-phrase-regexp
- (concat eword-encoded-word-prefix-regexp
- "\\(" eword-encoded-text-in-phrase-regexp "\\)"
- eword-encoded-word-suffix-regexp))
-(defconst eword-after-encoded-word-in-phrase-regexp "\\([ \t(]\\|$\\)")
-
-(defconst eword-encoded-text-in-comment-regexp "[]!-'*->@-[^-~]+")
-(defconst eword-encoded-word-in-comment-regexp
- (concat eword-encoded-word-prefix-regexp
- "\\(" eword-encoded-text-in-comment-regexp "\\)"
- eword-encoded-word-suffix-regexp))
-(defconst eword-after-encoded-word-in-comment-regexp "\\([ \t()\\\\]\\|$\\)")
-
-(defconst eword-encoded-text-in-quoted-string-regexp "[]!#->@-[^-~]+")
-(defconst eword-encoded-word-in-quoted-string-regexp
- (concat eword-encoded-word-prefix-regexp
- "\\(" eword-encoded-text-in-quoted-string-regexp "\\)"
- eword-encoded-word-suffix-regexp))
-(defconst eword-after-encoded-word-in-quoted-string-regexp "\\([ \t\"\\\\]\\|$\\)")
-
-; obsolete
-(defconst eword-encoded-text-regexp eword-encoded-text-in-unstructured-regexp)
-(defconst eword-encoded-word-regexp eword-encoded-word-in-unstructured-regexp)
-
-
-;;; @@ Base64
-;;;
-
-(defconst base64-token-regexp "[A-Za-z0-9+/]")
-(defconst base64-token-padding-regexp "[A-Za-z0-9+/=]")
-
-(defconst eword-B-encoded-text-regexp
- (concat "\\(\\("
- base64-token-regexp
- base64-token-regexp
- base64-token-regexp
- base64-token-regexp
- "\\)*"
- base64-token-regexp
- base64-token-regexp
- base64-token-padding-regexp
- base64-token-padding-regexp
- "\\)"))
+(eval-and-compile
+ (defconst eword-encoded-text-regexp "[!->@-~]+")
+
+ (defconst eword-encoded-word-regexp
+ (eval-when-compile
+ (concat (regexp-quote "=?")
+ "\\("
+ mime-charset-regexp
+ "\\)"
+ (regexp-quote "?")
+ "\\(B\\|Q\\)"
+ (regexp-quote "?")
+ "\\("
+ eword-encoded-text-regexp
+ "\\)"
+ (regexp-quote "?="))))
+ )
-;; (defconst eword-B-encoding-and-encoded-text-regexp
-;; (concat "\\(B\\)\\?" eword-B-encoded-text-regexp))
-
-;;; @@ Quoted-Printable
+;;; @ for string
;;;
-(defconst eword-Q-encoded-text-regexp
- (concat "\\([^=?]\\|" quoted-printable-octet-regexp "\\)+"))
-;; (defconst eword-Q-encoding-and-encoded-text-regexp
-;; (concat "\\(Q\\)\\?" eword-Q-encoded-text-regexp))
-
-
-;;; @ internal utilities
-;;;
+(defun eword-decode-string (string &optional must-unfold)
+ "Decode MIME encoded-words in STRING.
-(defun eword-decode-first-encoded-words (string
- eword-regexp
- after-regexp
- &optional must-unfold)
- "Decode MIME encoded-words in beginning of STRING.
-
-EWORD-REGEXP is the regexp that matches a encoded-word.
-Usual value is
-eword-encoded-word-in-unstructured-regexp,
-eword-encoded-text-in-phrase-regexp,
-eword-encoded-word-in-comment-regexp or
-eword-encoded-word-in-quoted-string-regexp.
-
-AFTER-REGEXP is the regexp that matches a after encoded-word.
-Usual value is
-eword-after-encoded-word-in-unstructured-regexp,
-eword-after-encoded-text-in-phrase-regexp,
-eword-after-encoded-word-in-comment-regexp or
-eword-after-encoded-word-in-quoted-string-regexp.
-
-If beginning of STRING matches EWORD-REGEXP with AFTER-REGEXP,
-returns a cons cell of decoded string(sequence of characters) and
-the rest(sequence of octets).
-
-If beginning of STRING does not matches EWORD-REGEXP and AFTER-REGEXP,
-returns nil.
+STRING is unfolded before decoding.
If an encoded-word is broken or your emacs implementation can not
-decode the charset included in it, it is returned in decoded part
-as encoded-word form.
+decode the charset included in it, it is not decoded.
If MUST-UNFOLD is non-nil, it unfolds and eliminates line-breaks even
if there are in decoded encoded-words (generated by bad manner MUA
such as a version of Net$cape)."
- (if eword-decode-sticked-encoded-word (setq after-regexp ""))
- (let* ((between-ewords-regexp
- (if eword-decode-sticked-encoded-word
- "\\(\n?[ \t]\\)*"
- "\\(\n?[ \t]\\)+"))
- (between-ewords-eword-after-regexp
- (concat "\\`\\(" between-ewords-regexp "\\)"
- "\\(" eword-regexp "\\)"
- after-regexp))
- (eword-after-regexp
- (concat "\\`\\(" eword-regexp "\\)" after-regexp))
- (src string) ; sequence of octets.
- (dst "")) ; sequence of characters.
- (if (string-match eword-after-regexp src)
- (let* (p
- (q (match-end 1))
- (ew (substring src 0 q))
- (dw (eword-decode-encoded-word ew must-unfold)))
- (setq dst (concat dst dw)
- src (substring src q))
- (if (not (string= ew dw))
- (progn
- (while
- (and
- (string-match between-ewords-eword-after-regexp src)
- (progn
- (setq p (match-end 1)
- q (match-end 3)
- ew (substring src p q)
- dw (eword-decode-encoded-word ew must-unfold))
- (if (string= ew dw)
- (progn
- (setq dst (concat dst (substring src 0 q))
- src (substring src q))
- nil)
- t)))
- (setq dst (concat dst dw)
- src (substring src q)))))
- (cons dst src))
- nil)))
-
-(defun eword-decode-entire-string (string
- eword-regexp
- after-regexp
- safe-regexp
- escape ; ?\\ or nil.
- delimiters ; list of chars.
- must-unfold
- code-conversion)
- (if (and code-conversion
- (not (mime-charset-to-coding-system code-conversion)))
- (setq code-conversion default-mime-charset))
- (let ((equal-safe-regexp (concat "\\`=?" safe-regexp))
- (dst "")
- (buf "")
- (src string)
- (ew-enable t))
- (while (< 0 (length src))
- (let ((ch (aref src 0))
- (decoded (and
- ew-enable
- (eword-decode-first-encoded-words src
- eword-regexp after-regexp must-unfold))))
- (if (and (not (string= buf ""))
- (or decoded (memq ch delimiters)))
- (setq dst (concat dst
- (std11-wrap-as-quoted-pairs
- (decode-mime-charset-string buf code-conversion)
- delimiters))
- buf ""))
- (cond
- (decoded
- (setq dst (concat dst
- (std11-wrap-as-quoted-pairs
- (car decoded)
- delimiters))
- src (cdr decoded)))
- ((memq ch delimiters)
- (setq dst (concat dst (list ch))
- src (substring src 1)
- ew-enable t))
- ((eq ch escape)
- (setq buf (concat buf (list (aref src 1)))
- src (substring src 2)
- ew-enable t))
- ((string-match "\\`[ \t\n]+" src)
- (setq buf (concat buf (substring src 0 (match-end 0)))
- src (substring src (match-end 0))
- ew-enable t))
- ((and (string-match equal-safe-regexp src)
- (< 0 (match-end 0)))
- (setq buf (concat buf (substring src 0 (match-end 0)))
- src (substring src (match-end 0))
- ew-enable eword-decode-sticked-encoded-word))
- (t (error "something wrong")))))
- (if (not (string= buf ""))
- (setq dst (concat dst
- (std11-wrap-as-quoted-pairs
- (decode-mime-charset-string buf code-conversion)
- delimiters))))
- dst))
-
-
-;;; @ for string
-;;;
+ (setq string (std11-unfold-string string))
+ (let ((dest "")(ew nil)
+ beg end)
+ (while (and (string-match eword-encoded-word-regexp string)
+ (setq beg (match-beginning 0)
+ end (match-end 0))
+ )
+ (if (> beg 0)
+ (if (not
+ (and (eq ew t)
+ (string-match "^[ \t]+$" (substring string 0 beg))
+ ))
+ (setq dest (concat dest (substring string 0 beg)))
+ )
+ )
+ (setq dest
+ (concat dest
+ (eword-decode-encoded-word
+ (substring string beg end) must-unfold)
+ ))
+ (setq string (substring string end))
+ (setq ew t)
+ )
+ (concat dest string)
+ ))
-(defun eword-decode-unstructured (string code-conversion &optional must-unfold)
- (eword-decode-entire-string
- string
- eword-encoded-word-in-unstructured-regexp
- eword-after-encoded-word-in-unstructured-regexp
- "[^ \t\n=]*"
- nil
- nil
- must-unfold
- code-conversion))
-
-(defun eword-decode-comment (string code-conversion &optional must-unfold)
- (eword-decode-entire-string
- string
- eword-encoded-word-in-comment-regexp
- eword-after-encoded-word-in-comment-regexp
- "[^ \t\n()\\\\=]*"
- ?\\
- '(?\( ?\))
- must-unfold
- code-conversion))
-
-(defun eword-decode-quoted-string (string code-conversion &optional must-unfold)
- (eword-decode-entire-string
- string
- eword-encoded-word-in-quoted-string-regexp
- eword-after-encoded-word-in-quoted-string-regexp
- "[^ \t\n\"\\\\=]*"
- ?\\
- '(?\")
- must-unfold
- code-conversion))
-
-(defun eword-decode-string (string &optional must-unfold code-conversion)
- "Decode MIME encoded-words in STRING.
+(defun eword-decode-structured-field-body (string
+ &optional start-column max-column
+ start)
+ (let ((tokens (eword-lexical-analyze string start 'must-unfold))
+ (result "")
+ token)
+ (while tokens
+ (setq token (car tokens))
+ (setq result (concat result (eword-decode-token token)))
+ (setq tokens (cdr tokens)))
+ result))
-STRING is unfolded before decoding.
+(defun eword-decode-and-unfold-structured-field-body (string
+ &optional
+ start-column
+ max-column
+ start)
+ "Decode and unfold STRING as structured field body.
+It decodes non us-ascii characters in FULL-NAME encoded as
+encoded-words or invalid \"raw\" string. \"Raw\" non us-ascii
+characters are regarded as variable `default-mime-charset'.
If an encoded-word is broken or your emacs implementation can not
-decode the charset included in it, it is not decoded.
-
-If MUST-UNFOLD is non-nil, it unfolds and eliminates line-breaks even
-if there are in decoded encoded-words (generated by bad manner MUA
-such as a version of Net$cape).
+decode the charset included in it, it is not decoded."
+ (let ((tokens (eword-lexical-analyze string start 'must-unfold))
+ (result ""))
+ (while tokens
+ (let* ((token (car tokens))
+ (type (car token)))
+ (setq tokens (cdr tokens))
+ (setq result
+ (if (eq type 'spaces)
+ (concat result " ")
+ (concat result (eword-decode-token token))
+ ))))
+ result))
-If CODE-CONVERSION is nil, it decodes only encoded-words. If it is
-mime-charset, it decodes non-ASCII bit patterns as the mime-charset.
-Otherwise it decodes non-ASCII bit patterns as the
-default-mime-charset."
- (eword-decode-unstructured
- (std11-unfold-string string)
- code-conversion
- must-unfold))
+(defun eword-decode-and-fold-structured-field-body (string
+ start-column
+ &optional max-column
+ start)
+ (if (and eword-max-size-to-decode
+ (> (length string) eword-max-size-to-decode))
+ string
+ (or max-column
+ (setq max-column fill-column))
+ (let ((c start-column)
+ (tokens (eword-lexical-analyze string start 'must-unfold))
+ (result "")
+ token)
+ (while (and (setq token (car tokens))
+ (setq tokens (cdr tokens)))
+ (let* ((type (car token)))
+ (if (eq type 'spaces)
+ (let* ((next-token (car tokens))
+ (next-str (eword-decode-token next-token))
+ (next-len (string-width next-str))
+ (next-c (+ c next-len 1)))
+ (if (< next-c max-column)
+ (setq result (concat result " " next-str)
+ c next-c)
+ (setq result (concat result "\n " next-str)
+ c (1+ next-len)))
+ (setq tokens (cdr tokens))
+ )
+ (let* ((str (eword-decode-token token)))
+ (setq result (concat result str)
+ c (+ c (string-width str)))
+ ))))
+ (if token
+ (concat result (eword-decode-token token))
+ result))))
+
+(defun eword-decode-unstructured-field-body (string &optional start-column
+ max-column)
+ (eword-decode-string
+ (decode-mime-charset-string string default-mime-charset)))
+
+(defun eword-decode-and-unfold-unstructured-field-body (string
+ &optional start-column
+ max-column)
+ (eword-decode-string
+ (decode-mime-charset-string (std11-unfold-string string)
+ default-mime-charset)
+ 'must-unfold))
+
+(defun eword-decode-unfolded-unstructured-field-body (string
+ &optional start-column
+ max-column)
+ (eword-decode-string
+ (decode-mime-charset-string string default-mime-charset)
+ 'must-unfold))
;;; @ for region
;;;
-(defun eword-decode-region (start end &optional unfolding must-unfold
- code-conversion)
+(defun eword-decode-region (start end &optional unfolding must-unfold)
"Decode MIME encoded-words in region between START and END.
If UNFOLDING is not nil, it unfolds before decoding.
If MUST-UNFOLD is non-nil, it unfolds and eliminates line-breaks even
if there are in decoded encoded-words (generated by bad manner MUA
-such as a version of Net$cape).
-
-If CODE-CONVERSION is nil, it decodes only encoded-words. If it is
-mime-charset, it decodes non-ASCII bit patterns as the mime-charset.
-Otherwise it decodes non-ASCII bit patterns as the
-default-mime-charset."
+such as a version of Net$cape)."
(interactive "*r")
(save-excursion
(save-restriction
(if unfolding
(eword-decode-unfold)
)
- (let ((str (eword-decode-unstructured
- (buffer-substring (point-min) (point-max))
- code-conversion
- must-unfold)))
- (delete-region (point-min) (point-max))
- (insert str)))))
-
-
-;;; @ for message header
-;;;
-
-(defcustom eword-decode-ignored-field-list
- '(newsgroups path lines nntp-posting-host received message-id date)
- "*List of field-names to be ignored when decoding.
-Each field name must be symbol."
- :group 'eword-decode
- :type '(repeat symbol))
-
-(defcustom eword-decode-structured-field-list
- '(reply-to resent-reply-to from resent-from sender resent-sender
- to resent-to cc resent-cc bcc resent-bcc dcc
- mime-version content-type content-transfer-encoding
- content-disposition)
- "*List of field-names to decode as structured field.
-Each field name must be symbol."
- :group 'eword-decode
- :type '(repeat symbol))
-
-(defun eword-decode-header (&optional code-conversion separator)
- "Decode MIME encoded-words in header fields.
-If CODE-CONVERSION is nil, it decodes only encoded-words. If it is
-mime-charset, it decodes non-ASCII bit patterns as the mime-charset.
-Otherwise it decodes non-ASCII bit patterns as the
-default-mime-charset.
-If SEPARATOR is not nil, it is used as header separator."
- (interactive "*")
- (if (and code-conversion
- (not (mime-charset-to-coding-system code-conversion)))
- (setq code-conversion default-mime-charset))
- (save-excursion
- (save-restriction
- (std11-narrow-to-header separator)
- (if code-conversion
- (let (beg p end field-name len)
- (goto-char (point-min))
- (while (re-search-forward std11-field-head-regexp nil t)
- (setq beg (match-beginning 0)
- p (match-end 0)
- field-name (buffer-substring beg (1- p))
- len (string-width field-name)
- field-name (intern (downcase field-name))
- end (std11-field-end))
- (cond ((memq field-name eword-decode-ignored-field-list)
- ;; Don't decode
- )
- ((memq field-name eword-decode-structured-field-list)
- ;; Decode as structured field
- (let ((body (buffer-substring p end)))
- (delete-region p end)
- (insert (eword-decode-and-fold-structured-field
- body (1+ len)))
- ))
- (t
- ;; Decode as unstructured field
- (save-restriction
- (narrow-to-region beg (1+ end))
- (goto-char p)
- (eword-decode-region beg (point-max) 'unfold nil
- code-conversion)
- (goto-char (point-max))
- )))))
- (eword-decode-region (point-min) (point-max) t nil nil)
- ))))
+ (goto-char (point-min))
+ (while (re-search-forward (concat "\\(" eword-encoded-word-regexp "\\)"
+ "\\(\n?[ \t]\\)+"
+ "\\(" eword-encoded-word-regexp "\\)")
+ nil t)
+ (replace-match "\\1\\6")
+ (goto-char (point-min))
+ )
+ (while (re-search-forward eword-encoded-word-regexp nil t)
+ (insert (eword-decode-encoded-word
+ (prog1
+ (buffer-substring (match-beginning 0) (match-end 0))
+ (delete-region (match-beginning 0) (match-end 0))
+ ) must-unfold))
+ )
+ )))
(defun eword-decode-unfold ()
(goto-char (point-min))
)))
+;;; @ for message header
+;;;
+
+(defvar mime-field-decoder-alist nil)
+
+(defvar mime-field-decoder-cache nil)
+
+(defvar mime-update-field-decoder-cache 'ew-mime-update-field-decoder-cache
+ "*Field decoder cache update function.")
+
+(defun ew-mime-update-field-decoder-cache (field mode)
+ (require 'ew-dec)
+ (let ((fun (cond
+ ((eq mode 'plain)
+ (lexical-let ((field-name (symbol-name field)))
+ (lambda (field-body &optional start-column max-column must-unfold)
+ (setq field-body (ew-lf-to-crlf field-body))
+ (let ((res (ew-crlf-to-lf
+ (ew-decode-field field-name field-body))))
+ (add-text-properties
+ 0 (length res)
+ (list 'original-field-name field-name
+ 'original-field-body field-body)
+ res)
+ res))))
+ ((eq mode 'wide)
+ (lexical-let ((field-name (symbol-name field)))
+ (lambda (field-body &optional start-column max-column must-unfold)
+ (setq field-body (ew-lf-to-crlf field-body))
+ (let* ((res (ew-decode-field field-name field-body))
+ (res (if (string= res field-body)
+ res
+ (ew-crlf-refold res
+ (length field-name)
+ (or max-column fill-column))))
+ (res (ew-crlf-to-lf res)))
+ (add-text-properties
+ 0 (length res)
+ (list 'original-field-name field-name
+ 'original-field-body field-body)
+ res)
+ res))))
+ ((eq mode 'summary)
+ (lexical-let ((field-name (symbol-name field)))
+ (lambda (field-body &optional start-column max-column must-unfold)
+ (setq field-body (ew-lf-to-crlf field-body))
+ (let ((res (ew-crlf-to-lf
+ (ew-crlf-unfold
+ (ew-decode-field field-name field-body)))))
+ (add-text-properties
+ 0 (length res)
+ (list 'original-field-name field-name
+ 'original-field-body field-body)
+ res)
+ res))))
+ ((eq mode 'nov)
+ (lexical-let ((field-name (symbol-name field)))
+ (lambda (field-body &optional start-column max-column must-unfold)
+ (setq field-body (ew-lf-to-crlf field-body))
+ (require 'ew-var)
+ (let ((ew-ignore-76bytes-limit t))
+ (let ((res (ew-crlf-to-lf
+ (ew-crlf-unfold
+ (ew-decode-field field-name field-body)))))
+ (add-text-properties
+ 0 (length res)
+ (list 'original-field-name field-name
+ 'original-field-body field-body)
+ res)
+ res)))))
+ (t
+ nil))))
+ (mime-update-field-decoder-cache field mode fun)))
+
+;;;###autoload
+(defun mime-set-field-decoder (field &rest specs)
+ "Set decoder of FILED.
+SPECS must be like `MODE1 DECODER1 MODE2 DECODER2 ...'.
+Each mode must be `nil', `plain', `wide', `summary' or `nov'.
+If mode is `nil', corresponding decoder is set up for every modes."
+ (when specs
+ (let ((mode (pop specs))
+ (function (pop specs)))
+ (if mode
+ (progn
+ (let ((cell (assq mode mime-field-decoder-alist)))
+ (if cell
+ (setcdr cell (put-alist field function (cdr cell)))
+ (setq mime-field-decoder-alist
+ (cons (cons mode (list (cons field function)))
+ mime-field-decoder-alist))
+ ))
+ (apply (function mime-set-field-decoder) field specs)
+ )
+ (mime-set-field-decoder field
+ 'plain function
+ 'wide function
+ 'summary function
+ 'nov function)
+ ))))
+
+;;;###autoload
+(defmacro mime-find-field-presentation-method (name)
+ "Return field-presentation-method from NAME.
+NAME must be `plain', `wide', `summary' or `nov'."
+ (cond ((eq name nil)
+ `(or (assq 'summary mime-field-decoder-cache)
+ '(summary))
+ )
+ ((and (consp name)
+ (car name)
+ (consp (cdr name))
+ (symbolp (car (cdr name)))
+ (null (cdr (cdr name))))
+ `(or (assq ,name mime-field-decoder-cache)
+ (cons ,name nil))
+ )
+ (t
+ `(or (assq (or ,name 'summary) mime-field-decoder-cache)
+ (cons (or ,name 'summary) nil))
+ )))
+
+(defun mime-find-field-decoder-internal (field &optional mode)
+ "Return function to decode field-body of FIELD in MODE.
+Optional argument MODE must be object of field-presentation-method."
+ (cdr (or (assq field (cdr mode))
+ (prog1
+ (funcall mime-update-field-decoder-cache
+ field (car mode))
+ (setcdr mode
+ (cdr (assq (car mode) mime-field-decoder-cache)))
+ ))))
+
+;;;###autoload
+(defun mime-find-field-decoder (field &optional mode)
+ "Return function to decode field-body of FIELD in MODE.
+Optional argument MODE must be object or name of
+field-presentation-method. Name of field-presentation-method must be
+`plain', `wide', `summary' or `nov'.
+Default value of MODE is `summary'."
+ (if (symbolp mode)
+ (let ((p (cdr (mime-find-field-presentation-method mode))))
+ (if (and p (setq p (assq field p)))
+ (cdr p)
+ (cdr (funcall mime-update-field-decoder-cache
+ field (or mode 'summary)))))
+ (inline (mime-find-field-decoder-internal field mode))
+ ))
+
+;;;###autoload
+(defun mime-update-field-decoder-cache (field mode &optional function)
+ "Update field decoder cache `mime-field-decoder-cache'."
+ (cond ((eq function 'identity)
+ (setq function nil)
+ )
+ ((null function)
+ (let ((decoder-alist
+ (cdr (assq (or mode 'summary) mime-field-decoder-alist))))
+ (setq function (cdr (or (assq field decoder-alist)
+ (assq t decoder-alist)))))
+ ))
+ (let ((cell (assq mode mime-field-decoder-cache))
+ ret)
+ (if cell
+ (if (setq ret (assq field (cdr cell)))
+ (setcdr ret function)
+ (setcdr cell (cons (setq ret (cons field function)) (cdr cell))))
+ (setq mime-field-decoder-cache
+ (cons (cons mode (list (setq ret (cons field function))))
+ mime-field-decoder-cache)))
+ ret))
+
+;; ignored fields
+(mime-set-field-decoder 'Archive nil nil)
+(mime-set-field-decoder 'Content-Md5 nil nil)
+(mime-set-field-decoder 'Control nil nil)
+(mime-set-field-decoder 'Date nil nil)
+(mime-set-field-decoder 'Distribution nil nil)
+(mime-set-field-decoder 'Followup-Host nil nil)
+(mime-set-field-decoder 'Followup-To nil nil)
+(mime-set-field-decoder 'Lines nil nil)
+(mime-set-field-decoder 'Message-Id nil nil)
+(mime-set-field-decoder 'Newsgroups nil nil)
+(mime-set-field-decoder 'Nntp-Posting-Host nil nil)
+(mime-set-field-decoder 'Path nil nil)
+(mime-set-field-decoder 'Posted-And-Mailed nil nil)
+(mime-set-field-decoder 'Received nil nil)
+(mime-set-field-decoder 'Status nil nil)
+(mime-set-field-decoder 'X-Face nil nil)
+(mime-set-field-decoder 'X-Face-Version nil nil)
+(mime-set-field-decoder 'X-Info nil nil)
+(mime-set-field-decoder 'X-Pgp-Key-Info nil nil)
+(mime-set-field-decoder 'X-Pgp-Sig nil nil)
+(mime-set-field-decoder 'X-Pgp-Sig-Version nil nil)
+(mime-set-field-decoder 'Xref nil nil)
+
+;; structured fields
+(let ((fields
+ '(Reply-To Resent-Reply-To From Resent-From Sender Resent-Sender
+ To Resent-To Cc Resent-Cc Bcc Resent-Bcc Dcc
+ Mail-Followup-To
+ Mime-Version Content-Type Content-Transfer-Encoding
+ Content-Disposition User-Agent))
+ field)
+ (while fields
+ (setq field (pop fields))
+ (mime-set-field-decoder
+ field
+ 'plain #'eword-decode-structured-field-body
+ 'wide #'eword-decode-and-fold-structured-field-body
+ 'summary #'eword-decode-and-unfold-structured-field-body
+ 'nov #'eword-decode-and-unfold-structured-field-body)
+ ))
+
+;; unstructured fields (default)
+(mime-set-field-decoder
+ t
+ 'plain #'eword-decode-unstructured-field-body
+ 'wide #'eword-decode-unstructured-field-body
+ 'summary #'eword-decode-and-unfold-unstructured-field-body
+ 'nov #'eword-decode-unfolded-unstructured-field-body)
+
+;;;###autoload
+(defun mime-decode-field-body (field-body field-name
+ &optional mode max-column)
+ "Decode FIELD-BODY as FIELD-NAME in MODE, and return the result.
+Optional argument MODE must be `plain', `wide', `summary' or `nov'.
+Default mode is `summary'.
+
+If MODE is `wide' and MAX-COLUMN is non-nil, the result is folded with
+MAX-COLUMN.
+
+Non MIME encoded-word part in FILED-BODY is decoded with
+`default-mime-charset'."
+ (unless mode (setq mode 'summary))
+ (if (symbolp field-name) (setq field-name (symbol-name field-name)))
+ (let ((decoded
+ (if (eq mode 'nov)
+ (let ((ew-ignore-76bytes-limit t))
+ (ew-decode-field
+ field-name (ew-lf-crlf-to-crlf field-body)))
+ (ew-decode-field
+ field-name (ew-lf-crlf-to-crlf field-body)))))
+ (if (and (eq mode 'wide) max-column)
+ (setq decoded (ew-crlf-refold
+ decoded
+ (1+ (string-width field-name))
+ max-column))
+ (if (not (eq mode 'plain))
+ (setq decoded (ew-crlf-unfold decoded))))
+ (setq decoded (ew-crlf-to-lf decoded))
+ (add-text-properties 0 (length decoded)
+ (list 'original-field-name field-name
+ 'original-field-body field-body)
+ decoded)
+ decoded))
+
+;;;###autoload
+(defun mime-decode-header-in-region (start end
+ &optional code-conversion)
+ "Decode MIME encoded-words in region between START and END.
+If CODE-CONVERSION is nil, it decodes only encoded-words. If it is
+mime-charset, it decodes non-ASCII bit patterns as the mime-charset.
+Otherwise it decodes non-ASCII bit patterns as the
+default-mime-charset."
+ (interactive "*r")
+ (save-excursion
+ (save-restriction
+ (narrow-to-region start end)
+ (let ((default-charset
+ (if code-conversion
+ (if (mime-charset-to-coding-system code-conversion)
+ code-conversion
+ default-mime-charset))))
+ (if default-charset
+ (let ((mode-obj (mime-find-field-presentation-method 'wide))
+ beg p end field-name len field-decoder)
+ (goto-char (point-min))
+ (while (re-search-forward std11-field-head-regexp nil t)
+ (setq beg (match-beginning 0)
+ p (match-end 0)
+ field-name (buffer-substring beg (1- p))
+ len (string-width field-name)
+ field-decoder (inline
+ (mime-find-field-decoder-internal
+ (intern (capitalize field-name))
+ mode-obj)))
+ (when field-decoder
+ (setq end (std11-field-end))
+ (let ((body (buffer-substring p end))
+ (default-mime-charset default-charset))
+ (delete-region p end)
+ (insert (funcall field-decoder body (1+ len)))
+ (add-text-properties beg (min (1+ (point)) (point-max))
+ (list 'original-field-name field-name
+ 'original-field-body field-body))
+ ))
+ ))
+ (eword-decode-region (point-min) (point-max) t)
+ )))))
+
+;;;###autoload
+(defun mime-decode-header-in-buffer (&optional code-conversion separator)
+ "Decode MIME encoded-words in header fields.
+If CODE-CONVERSION is nil, it decodes only encoded-words. If it is
+mime-charset, it decodes non-ASCII bit patterns as the mime-charset.
+Otherwise it decodes non-ASCII bit patterns as the
+default-mime-charset.
+If SEPARATOR is not nil, it is used as header separator."
+ (interactive "*")
+ (mime-decode-header-in-region
+ (point-min)
+ (save-excursion
+ (goto-char (point-min))
+ (if (re-search-forward
+ (concat "^\\(" (regexp-quote (or separator "")) "\\)?$")
+ nil t)
+ (match-beginning 0)
+ (point-max)
+ ))
+ code-conversion))
+
+(define-obsolete-function-alias 'eword-decode-header
+ 'mime-decode-header-in-buffer)
+
+
;;; @ encoded-word decoder
;;;
as a version of Net$cape)."
(let ((cs (mime-charset-to-coding-system charset)))
(if cs
- (let ((dest
- (cond
- ((string-equal "B" encoding)
- (if (and (string-match eword-B-encoded-text-regexp string)
- (string-equal string (match-string 0 string)))
- (base64-decode-string string)
- (error "Invalid encoded-text %s" string)))
- ((string-equal "Q" encoding)
- (if (and (string-match eword-Q-encoded-text-regexp string)
- (string-equal string (match-string 0 string)))
- (q-encoding-decode-string string)
- (error "Invalid encoded-text %s" string)))
- (t
- (error "Invalid encoding %s" encoding)
- )))
- )
- (if dest
- (progn
- (setq dest (decode-coding-string dest cs))
- (if must-unfold
- (mapconcat (function
- (lambda (chr)
- (cond
- ((eq chr ?\n) "")
- ((eq chr ?\t) " ")
- (t (char-to-string chr)))
- ))
- (std11-unfold-string dest)
- "")
- dest)
- ))))))
+ (let ((dest (encoded-text-decode-string string encoding)))
+ (when dest
+ (setq dest (decode-mime-charset-string dest charset))
+ (if must-unfold
+ (mapconcat (function
+ (lambda (chr)
+ (cond ((eq chr ?\n) "")
+ ((eq chr ?\t) " ")
+ (t (char-to-string chr)))
+ ))
+ (std11-unfold-string dest)
+ "")
+ dest))))))
;;; @ lexical analyze
"*Max position of eword-lexical-analyze-cache.
It is max size of eword-lexical-analyze-cache - 1.")
-(defcustom eword-lexical-analyzers
+(defcustom eword-lexical-analyzer
'(eword-analyze-quoted-string
eword-analyze-domain-literal
eword-analyze-comment
eword-analyze-encoded-word
eword-analyze-atom)
"*List of functions to return result of lexical analyze.
-Each function must have two arguments: STRING and MUST-UNFOLD.
+Each function must have three arguments: STRING, START and MUST-UNFOLD.
STRING is the target string to be analyzed.
+START is start position of STRING to analyze.
If MUST-UNFOLD is not nil, each function must unfold and eliminate
bare-CR and bare-LF from the result even if they are included in
content of the encoded-word.
:group 'eword-decode
:type '(repeat function))
-(defun eword-analyze-quoted-string (string &optional must-unfold)
- (let ((p (std11-check-enclosure string ?\" ?\")))
+(defun eword-analyze-quoted-string-without-encoded-word (string start &optional must-unfold)
+ (let ((p (std11-check-enclosure string ?\" ?\" nil start)))
+ (if p
+ (cons (cons 'quoted-string
+ (decode-mime-charset-string
+ (std11-strip-quoted-pair
+ (substring string (1+ start) (1- p)))
+ default-mime-charset))
+ ;;(substring string p))
+ p)
+ )))
+
+(defun eword-analyze-quoted-string-with-encoded-word (string start &optional must-unfold)
+ (let ((p (std11-check-enclosure string ?\" ?\" nil start)))
(if p
(cons (cons 'quoted-string
- (eword-decode-quoted-string
- (substring string 0 p)
- default-mime-charset))
- (substring string p))
+ (let ((str
+ (std11-strip-quoted-pair
+ (substring string (1+ start) (1- p)))))
+ (if (string-match eword-encoded-word-regexp str)
+ (eword-decode-encoded-word str)
+ (decode-mime-charset-string str default-mime-charset)
+ )))
+ p)
)))
-(defun eword-analyze-domain-literal (string &optional must-unfold)
- (std11-analyze-domain-literal string))
-
-(defun eword-analyze-comment (string &optional must-unfold)
- (let ((len (length string)))
- (if (and (< 0 len) (eq (aref string 0) ?\())
- (let ((p 0))
- (while (and p (< p len) (eq (aref string p) ?\())
- (setq p (std11-check-enclosure string ?\( ?\) t p)))
- (setq p (or p len))
- (cons (cons 'comment
- (eword-decode-comment
- (substring string 0 p)
- default-mime-charset))
- (substring string p)))
- nil)))
-
-(defun eword-analyze-spaces (string &optional must-unfold)
- (std11-analyze-spaces string))
-
-(defun eword-analyze-special (string &optional must-unfold)
- (std11-analyze-special string))
-
-(defun eword-analyze-encoded-word (string &optional must-unfold)
- (let ((decoded (eword-decode-first-encoded-words
- string
- eword-encoded-word-in-phrase-regexp
- eword-after-encoded-word-in-phrase-regexp
- must-unfold)))
- (if decoded
- (cons (cons 'atom (car decoded)) (cdr decoded)))))
-
-(defun eword-analyze-atom (string &optional must-unfold)
- (if (let ((enable-multibyte-characters nil))
- (string-match std11-atom-regexp string))
+(defvar eword-analyze-quoted-encoded-word nil)
+(defun eword-analyze-quoted-string (string start &optional must-unfold)
+ (if eword-analyze-quoted-encoded-word
+ (eword-analyze-quoted-string-with-encoded-word string start must-unfold)
+ (eword-analyze-quoted-string-without-encoded-word string start must-unfold)))
+
+(defun eword-analyze-domain-literal (string start &optional must-unfold)
+ (std11-analyze-domain-literal string start))
+
+(defun eword-analyze-comment (string from &optional must-unfold)
+ (let ((len (length string))
+ (i (or from 0))
+ dest last-str
+ chr ret)
+ (when (and (> len i)
+ (eq (aref string i) ?\())
+ (setq i (1+ i)
+ from i)
+ (catch 'tag
+ (while (< i len)
+ (setq chr (aref string i))
+ (cond ((eq chr ?\\)
+ (setq i (1+ i))
+ (if (>= i len)
+ (throw 'tag nil)
+ )
+ (setq last-str (concat last-str
+ (substring string from (1- i))
+ (char-to-string (aref string i)))
+ i (1+ i)
+ from i)
+ )
+ ((eq chr ?\))
+ (setq ret (concat last-str
+ (substring string from i)))
+ (throw 'tag (cons
+ (cons 'comment
+ (nreverse
+ (if (string= ret "")
+ dest
+ (cons
+ (eword-decode-string
+ (decode-mime-charset-string
+ ret default-mime-charset)
+ must-unfold)
+ dest)
+ )))
+ (1+ i)))
+ )
+ ((eq chr ?\()
+ (if (setq ret (eword-analyze-comment string i must-unfold))
+ (setq last-str
+ (concat last-str
+ (substring string from i))
+ dest
+ (if (string= last-str "")
+ (cons (car ret) dest)
+ (list* (car ret)
+ (eword-decode-string
+ (decode-mime-charset-string
+ last-str default-mime-charset)
+ must-unfold)
+ dest)
+ )
+ i (cdr ret)
+ from i
+ last-str "")
+ (throw 'tag nil)
+ ))
+ (t
+ (setq i (1+ i))
+ ))
+ )))))
+
+(defun eword-analyze-spaces (string start &optional must-unfold)
+ (std11-analyze-spaces string start))
+
+(defun eword-analyze-special (string start &optional must-unfold)
+ (std11-analyze-special string start))
+
+(defun eword-analyze-encoded-word (string start &optional must-unfold)
+ (if (and (string-match eword-encoded-word-regexp string start)
+ (= (match-beginning 0) start))
+ (let ((end (match-end 0))
+ (dest (eword-decode-encoded-word (match-string 0 string)
+ must-unfold))
+ )
+ ;;(setq string (substring string end))
+ (setq start end)
+ (while (and (string-match (eval-when-compile
+ (concat "[ \t\n]*\\("
+ eword-encoded-word-regexp
+ "\\)"))
+ string start)
+ (= (match-beginning 0) start))
+ (setq end (match-end 0))
+ (setq dest
+ (concat dest
+ (eword-decode-encoded-word (match-string 1 string)
+ must-unfold))
+ ;;string (substring string end))
+ start end)
+ )
+ (cons (cons 'atom dest) ;;string)
+ end)
+ )))
+
+(defun eword-analyze-atom (string start &optional must-unfold)
+ (if (and (string-match std11-atom-regexp string start)
+ (= (match-beginning 0) start))
(let ((end (match-end 0)))
- (if (and eword-decode-sticked-encoded-word
- (string-match eword-encoded-word-in-phrase-regexp
- (substring string 0 end))
- (< 0 (match-beginning 0)))
- (setq end (match-beginning 0)))
(cons (cons 'atom (decode-mime-charset-string
- (substring string 0 end)
+ (substring string start end)
default-mime-charset))
- (substring string end)
- ))))
-
-(defun eword-lexical-analyze-internal (string must-unfold)
- (let (dest ret)
- (while (not (string-equal string ""))
+ ;;(substring string end)
+ end)
+ )))
+
+(defun eword-lexical-analyze-internal (string start must-unfold)
+ (let ((len (length string))
+ dest ret)
+ (while (< start len)
(setq ret
- (let ((rest eword-lexical-analyzers)
+ (let ((rest eword-lexical-analyzer)
func r)
(while (and (setq func (car rest))
- (null (setq r (funcall func string must-unfold)))
+ (null
+ (setq r (funcall func string start must-unfold)))
)
(setq rest (cdr rest)))
- (or r `((error . ,string) . ""))
+ (or r
+ (list (cons 'error (substring string start)) (1+ len)))
))
- (setq dest (cons (car ret) dest))
- (setq string (cdr ret))
+ (setq dest (cons (car ret) dest)
+ start (cdr ret))
)
(nreverse dest)
))
-(defun eword-lexical-analyze (string &optional must-unfold)
+(defun eword-lexical-analyze (string &optional start must-unfold)
"Return lexical analyzed list corresponding STRING.
It is like std11-lexical-analyze, but it decodes non us-ascii
characters encoded as encoded-words or invalid \"raw\" format.
\"Raw\" non us-ascii characters are regarded as variable
`default-mime-charset'."
- (let* ((str (copy-sequence string))
- (key (cons str (cons default-mime-charset must-unfold)))
- ret)
- (set-text-properties 0 (length str) nil str)
+ (let ((key (substring string (or start 0)))
+ ret cell)
+ (set-text-properties 0 (length key) nil key)
(if (setq ret (assoc key eword-lexical-analyze-cache))
(cdr ret)
- (setq ret (eword-lexical-analyze-internal str must-unfold))
+ (setq ret (eword-lexical-analyze-internal key 0 must-unfold))
(setq eword-lexical-analyze-cache
(cons (cons key ret)
- (last eword-lexical-analyze-cache
- eword-lexical-analyze-cache-max)))
+ eword-lexical-analyze-cache))
+ (if (cdr (setq cell (nthcdr eword-lexical-analyze-cache-max
+ eword-lexical-analyze-cache)))
+ (setcdr cell nil))
ret)))
(defun eword-decode-token (token)
- (cdr token))
-
-(defun eword-decode-and-fold-structured-field
- (string start-column &optional max-column must-unfold)
- "Decode and fold (fill) STRING as structured field body.
-It decodes non us-ascii characters in FULL-NAME encoded as
-encoded-words or invalid \"raw\" string. \"Raw\" non us-ascii
-characters are regarded as variable `default-mime-charset'.
-
-If an encoded-word is broken or your emacs implementation can not
-decode the charset included in it, it is not decoded.
-
-If MAX-COLUMN is omitted, `fill-column' is used.
-
-If MUST-UNFOLD is non-nil, it unfolds and eliminates line-breaks even
-if there are in decoded encoded-words (generated by bad manner MUA
-such as a version of Net$cape)."
- (or max-column
- (setq max-column fill-column))
- (let ((c start-column)
- (tokens (eword-lexical-analyze string must-unfold))
- (result "")
- token)
- (while (and (setq token (car tokens))
- (setq tokens (cdr tokens)))
- (let* ((type (car token)))
- (if (eq type 'spaces)
- (let* ((next-token (car tokens))
- (next-str (eword-decode-token next-token))
- (next-len (string-width next-str))
- (next-c (+ c next-len 1)))
- (if (< next-c max-column)
- (setq result (concat result " " next-str)
- c next-c)
- (setq result (concat result "\n " next-str)
- c (1+ next-len)))
- (setq tokens (cdr tokens))
- )
- (let* ((str (eword-decode-token token)))
- (setq result (concat result str)
- c (+ c (string-width str)))
- ))))
- (if token
- (concat result (eword-decode-token token))
- result)))
-
-(defun eword-decode-and-unfold-structured-field (string)
- "Decode and unfold STRING as structured field body.
-It decodes non us-ascii characters in FULL-NAME encoded as
-encoded-words or invalid \"raw\" string. \"Raw\" non us-ascii
-characters are regarded as variable `default-mime-charset'.
-
-If an encoded-word is broken or your emacs implementation can not
-decode the charset included in it, it is not decoded."
- (let ((tokens (eword-lexical-analyze string 'must-unfold))
- (result ""))
- (while tokens
- (let* ((token (car tokens))
- (type (car token)))
- (setq tokens (cdr tokens))
- (setq result
- (if (eq type 'spaces)
- (concat result " ")
- (concat result (eword-decode-token token))
- ))))
- result))
-
-(defun eword-decode-structured-field-body (string &optional must-unfold
- start-column max-column)
- "Decode non us-ascii characters in STRING as structured field body.
-STRING is unfolded before decoding.
-
-It decodes non us-ascii characters in FULL-NAME encoded as
-encoded-words or invalid \"raw\" string. \"Raw\" non us-ascii
-characters are regarded as variable `default-mime-charset'.
-
-If an encoded-word is broken or your emacs implementation can not
-decode the charset included in it, it is not decoded.
-
-If MUST-UNFOLD is non-nil, it unfolds and eliminates line-breaks even
-if there are in decoded encoded-words (generated by bad manner MUA
-such as a version of Net$cape)."
- (if start-column
- ;; fold with max-column
- (eword-decode-and-fold-structured-field
- string start-column max-column must-unfold)
- ;; Don't fold
- (mapconcat (function eword-decode-token)
- (eword-lexical-analyze string must-unfold)
- "")
- ))
-
-(defun eword-decode-unstructured-field-body (string &optional must-unfold)
- "Decode non us-ascii characters in STRING as unstructured field body.
-STRING is unfolded before decoding.
-
-It decodes non us-ascii characters in FULL-NAME encoded as
-encoded-words or invalid \"raw\" string. \"Raw\" non us-ascii
-characters are regarded as variable `default-mime-charset'.
-
-If an encoded-word is broken or your emacs implementation can not
-decode the charset included in it, it is not decoded.
-
-If MUST-UNFOLD is non-nil, it unfolds and eliminates line-breaks even
-if there are in decoded encoded-words (generated by bad manner MUA
-such as a version of Net$cape)."
- (eword-decode-string string must-unfold default-mime-charset))
-
-(defun eword-extract-address-components (string)
+ (let ((type (car token))
+ (value (cdr token)))
+ (cond ((eq type 'quoted-string)
+ (std11-wrap-as-quoted-string value))
+ ((eq type 'comment)
+ (let ((dest ""))
+ (while value
+ (setq dest (concat dest
+ (if (stringp (car value))
+ (std11-wrap-as-quoted-pairs
+ (car value) '(?( ?)))
+ (eword-decode-token (car value))
+ ))
+ value (cdr value))
+ )
+ (concat "(" dest ")")
+ ))
+ (t value))))
+
+(defun eword-extract-address-components (string &optional start)
"Extract full name and canonical address from STRING.
Returns a list of the form (FULL-NAME CANONICAL-ADDRESS).
If no name can be extracted, FULL-NAME will be nil.
characters are regarded as variable `default-mime-charset'."
(let* ((structure (car (std11-parse-address
(eword-lexical-analyze
- (std11-unfold-string string) 'must-unfold))))
+ (std11-unfold-string string) start
+ 'must-unfold))))
(phrase (std11-full-name-string structure))
(address (std11-address-string structure))
)
projects / elisp / flim.git / blobdiff