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|
;;; elmo-mime.el --- MIME module for ELMO.
;; Copyright (C) 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
;; Author: Yuuichi Teranishi <teranisi@gohome.org>
;; Keywords: mail, net news
;; This file is part of ELMO (Elisp Library for Message Orchestration).
;; 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., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;
;;; Commentary:
;;
;;; Code:
;;
(require 'elmo-vars)
(require 'mmbuffer)
(require 'mmimap)
(require 'mime-view)
(eval-when-compile
(require 'luna)
(require 'elmo) ; elmo-folder-do-each-message-entity
(require 'cl))
;; MIME-Entity
(eval-and-compile
(luna-define-class elmo-mime-entity))
(luna-define-generic elmo-mime-entity-display-p (entity mime-mode)
"Return non-nil if ENTITY is able to display with MIME-MODE.
MIME-MODE is a symbol which is one of the following:
`mime' (Can display each MIME part)
`as-is' (Can display raw message)")
(luna-define-generic elmo-mime-entity-reassembled-p (entity)
"Return non-nil if ENTITY is reassembled message/partial pieces.")
(luna-define-generic elmo-mime-entity-display (entity preview-buffer
&optional
original-major-mode
keymap)
"Display MIME message ENTITY.
PREVIEW-BUFFER is a view buffer.
Optional argument ORIGINAL-MAJOR-MODE is major-mode of representation
buffer of ENTITY. If it is nil, current `major-mode' is used.
If optional argument KEYMAP is specified,
use for keymap of representation buffer.")
(luna-define-generic elmo-mime-entity-display-as-is (entity
preview-buffer
&optional
original-major-mode
keymap)
"Display MIME message ENTITY as is.
PREVIEW-BUFFER is a view buffer.
Optional argument ORIGINAL-MAJOR-MODE is major-mode of representation
buffer of ENTITY. If it is nil, current `major-mode' is used.
If optional argument KEYMAP is specified,
use for keymap of representation buffer.")
(luna-define-method elmo-mime-entity-display ((entity elmo-mime-entity)
preview-buffer
&optional
original-major-mode
keymap)
(let ((elmo-message-displaying t)
(default-mime-charset 'x-unknown))
(mime-display-message entity
preview-buffer
nil
keymap
original-major-mode)))
(defun elmo-mime-entity-fragment-p (entity)
(and (not (elmo-mime-entity-reassembled-p entity))
(eq (mime-entity-media-type entity) 'message)
(eq (mime-entity-media-subtype entity) 'partial)))
(eval-and-compile
(luna-define-class mime-elmo-buffer-entity (mime-buffer-entity
elmo-mime-entity)
(reassembled))
(luna-define-internal-accessors 'mime-elmo-buffer-entity)
(luna-define-class mime-elmo-imap-entity (mime-imap-entity
elmo-mime-entity)))
;; Provide backend
(provide 'mmelmo-imap)
(provide 'mmelmo-buffer)
(defvar elmo-message-ignored-field-list mime-view-ignored-field-list)
(defvar elmo-message-visible-field-list mime-view-visible-field-list)
(defvar elmo-message-sorted-field-list nil)
(defvar elmo-mime-display-header-analysis t)
(defcustom elmo-mime-header-max-column 'fill-column
"*Header max column number. Default is `fill-colmn'.
If a symbol of variable is specified, use its value in message buffer.
If a symbol of function is specified, the function is called and its return
value is used."
:type '(choice (integer :tag "Column Number")
(variable :tag "Variable")
(function :tag "Function"))
:group 'elmo)
(luna-define-method initialize-instance :after ((entity mime-elmo-buffer-entity)
&rest init-args)
entity)
(luna-define-method initialize-instance :around ((entity mime-elmo-imap-entity)
&rest init-args)
(luna-call-next-method))
;;; Insert sorted header.
(defsubst elmo-mime-insert-header-from-buffer (buffer
start end
&optional invisible-fields
visible-fields
sort-fields)
(let ((the-buf (current-buffer))
(max-column (cond ((functionp elmo-mime-header-max-column)
(funcall elmo-mime-header-max-column))
((and (symbolp elmo-mime-header-max-column)
(boundp elmo-mime-header-max-column))
(symbol-value elmo-mime-header-max-column))
(t
elmo-mime-header-max-column)))
vf-alist)
(with-current-buffer buffer
(save-restriction
(narrow-to-region start end)
(goto-char start)
(while (re-search-forward std11-field-head-regexp nil t)
(let* ((field-start (match-beginning 0))
(name-end (match-end 0))
(field-name (buffer-substring field-start name-end)))
(when (mime-visible-field-p field-name
visible-fields invisible-fields)
(let* ((field (intern
(capitalize
(buffer-substring field-start (1- name-end)))))
(field-body (buffer-substring name-end (std11-field-end)))
(field-decoder
(and elmo-mime-display-header-analysis
(inline (mime-find-field-decoder field 'wide)))))
(setq vf-alist (cons (list field-name field-body field-decoder)
vf-alist)))))))
(and vf-alist
(setq vf-alist
(sort vf-alist
(lambda (s d)
(let ((sf (car s))
(df (car d)))
(catch 'done
(dolist (re sort-fields)
(when (string-match re sf)
(throw 'done t))
(when (string-match re df)
(throw 'done nil)))
t)))))))
(set-buffer the-buf) ; verbose. remove me.
(save-excursion
(while vf-alist
(let* ((vf (car vf-alist))
(field-name (nth 0 vf))
(field-body (nth 1 vf))
(field-decoder (nth 2 vf)))
(insert field-name)
(insert (or (and field-decoder
(ignore-errors
(funcall field-decoder field-body
(string-width field-name)
max-column)))
;; Don't decode
field-body))
(insert "\n"))
(setq vf-alist (cdr vf-alist)))
(run-hooks 'mmelmo-header-inserted-hook))))
(luna-define-generic elmo-mime-insert-sorted-header (entity
&optional invisible-fields
visible-fields
sorted-fields)
"Insert sorted header fields of the ENTITY.")
(luna-define-method elmo-mime-insert-sorted-header ((entity
mime-elmo-buffer-entity)
&optional invisible-fields
visible-fields
sorted-fields)
(elmo-mime-insert-header-from-buffer
(mime-buffer-entity-buffer-internal entity)
(mime-buffer-entity-header-start-internal entity)
(mime-buffer-entity-header-end-internal entity)
invisible-fields visible-fields sorted-fields))
(luna-define-method elmo-mime-insert-sorted-header ((entity
mime-elmo-imap-entity)
&optional invisible-fields
visible-fields
sorted-fields)
(let ((the-buf (current-buffer))
buf p-min p-max)
(with-temp-buffer
(insert (mime-imap-entity-header-string entity))
(setq buf (current-buffer)
p-min (point-min)
p-max (point-max))
(set-buffer the-buf)
(elmo-mime-insert-header-from-buffer buf p-min p-max
invisible-fields
visible-fields
sorted-fields))))
(luna-define-method mime-insert-text-content :around
((entity mime-elmo-buffer-entity))
(luna-call-next-method)
(run-hooks 'elmo-message-text-content-inserted-hook))
(luna-define-method mime-insert-text-content :around
((entity mime-elmo-imap-entity))
(luna-call-next-method)
(run-hooks 'elmo-message-text-content-inserted-hook))
(defun elmo-mime-insert-header (entity situation)
(elmo-mime-insert-sorted-header
entity
elmo-message-ignored-field-list
elmo-message-visible-field-list
elmo-message-sorted-field-list)
(run-hooks 'elmo-message-header-inserted-hook))
;; mime-elmo-buffer-entity
(luna-define-method elmo-mime-entity-display-p
((entity mime-elmo-buffer-entity) mime-mode)
;; always return t.
t)
(luna-define-method elmo-mime-entity-reassembled-p ((entity
mime-elmo-buffer-entity))
(mime-elmo-buffer-entity-reassembled-internal entity))
(luna-define-method elmo-mime-entity-display-as-is ((entity
mime-elmo-buffer-entity)
preview-buffer
&optional
original-major-mode
keymap)
(elmo-mime-display-as-is-internal entity
preview-buffer
nil
keymap
original-major-mode))
;; mime-elmo-imap-entity
(luna-define-method elmo-mime-entity-display-p
((entity mime-elmo-imap-entity) mime-mode)
(not (eq mime-mode 'as-is)))
(luna-define-method elmo-mime-entity-display-as-is ((entity
mime-elmo-imap-entity)
preview-buffer
&optional
original-major-mode
keymap)
(error "Does not support this method"))
(defun elmo-message-mime-entity (folder number rawbuf reassemble
&optional
ignore-cache unread entire)
"Return the mime-entity structure of the message in the FOLDER with NUMBER.
RAWBUF is the output buffer for original message.
If REASSEMBLE is non-nil and MIME media type of the message is message/partial,
the mime-entity is reassembled partial message.
If optional argument IGNORE-CACHE is non-nil, existing cache is ignored.
If second optional argument UNREAD is non-nil,
keep status of the message as unread.
If third optional argument ENTIRE is non-nil, fetch entire message at once."
(let (id message entity content-type)
(or (and reassemble
(setq entity (elmo-message-entity folder number))
(setq id (if (setq content-type (elmo-message-entity-field
entity 'content-type))
(and (string-match "message/partial" content-type)
(mime-content-type-parameter
(mime-parse-Content-Type content-type) "id"))
(and (setq message (elmo-message-mime-entity-internal
folder number rawbuf
ignore-cache unread entire))
(eq (mime-entity-media-type message) 'message)
(eq (mime-entity-media-subtype message) 'partial)
(mime-content-type-parameter
(mime-entity-content-type message) "id"))))
(elmo-message-reassembled-mime-entity
folder id rawbuf
(elmo-message-entity-field entity 'subject)
ignore-cache
unread))
message
(elmo-message-mime-entity-internal
folder number rawbuf ignore-cache unread entire))))
(defun elmo-message-mime-entity-internal (folder number rawbuf
&optional
ignore-cache unread entire)
(let ((strategy (elmo-find-fetch-strategy folder number
ignore-cache
entire)))
(cond ((null strategy) nil)
((eq (elmo-fetch-strategy-entireness strategy) 'section)
(mime-open-entity
'elmo-imap
(luna-make-entity 'mime-elmo-imap-location
:folder folder
:number number
:rawbuf rawbuf
:strategy strategy)))
(t
(with-current-buffer rawbuf
(let (buffer-read-only)
(erase-buffer)
(elmo-message-fetch folder number strategy unread)))
(mime-open-entity 'elmo-buffer rawbuf)))))
(defconst elmo-mime-inherit-field-list-from-enclosed
'("^Content-.*:" "^Message-Id:" "^Subject:"
"^Encrypted.*:" "^MIME-Version:"))
(defsubst elmo-mime-make-reassembled-mime-entity (buffer)
(let ((entity (mime-open-entity 'elmo-buffer buffer)))
(mime-elmo-buffer-entity-set-reassembled-internal entity t)
entity))
(defun elmo-message-reassembled-mime-entity (folder id rawbuf subject
&optional
ignore-cache
unread)
(let ((cache (elmo-file-cache-get (concat "<" id ">")))
pieces)
(if (and (not ignore-cache)
(eq (elmo-file-cache-status cache) 'entire))
;; use cache
(with-current-buffer rawbuf
(let (buffer-read-only)
(erase-buffer)
(elmo-file-cache-load (elmo-file-cache-path cache) nil))
(elmo-mime-make-reassembled-mime-entity rawbuf))
;; reassemble fragment of the entity
(when (setq pieces (elmo-mime-collect-message/partial-pieces
folder id
(regexp-quote
(if (string-match "[0-9\n]+" subject)
(substring subject 0 (match-beginning 0))
subject))
ignore-cache unread))
(with-current-buffer rawbuf
(let (buffer-read-only
(outer-header (car pieces))
(pieces (sort (cdr pieces) #'car-less-than-car))
contents entity)
(erase-buffer)
(while pieces
(insert (cdr (car pieces)))
(setq pieces (cdr pieces)))
(let ((case-fold-search t))
(save-restriction
(std11-narrow-to-header)
(goto-char (point-min))
(while (re-search-forward std11-field-head-regexp nil t)
(let ((field-start (match-beginning 0)))
(unless (mime-visible-field-p
(buffer-substring field-start (match-end 0))
elmo-mime-inherit-field-list-from-enclosed
'(".*"))
(delete-region field-start (1+ (std11-field-end))))))))
(goto-char (point-min))
(insert outer-header)
;; save cache
(elmo-file-cache-save (elmo-file-cache-path cache) nil)
(elmo-mime-make-reassembled-mime-entity rawbuf)))))))
(defun elmo-mime-collect-message/partial-pieces (folder id subject-regexp
&optional
ignore-cache
unread)
(catch 'complete
(with-temp-buffer
(set-buffer-multibyte nil)
(let (total header pieces)
(elmo-folder-do-each-message-entity (entity folder)
(when (string-match
subject-regexp
(elmo-message-entity-field entity 'subject))
(erase-buffer)
(let* ((message (elmo-message-mime-entity-internal
folder
(elmo-message-entity-number entity)
(current-buffer)
ignore-cache
unread))
(ct (mime-entity-content-type message))
(the-id (or (mime-content-type-parameter ct "id") ""))
number)
(when (string= (downcase the-id)
(downcase id))
(setq number (string-to-number
(mime-content-type-parameter ct "number")))
(setq pieces (cons (cons number (mime-entity-body message))
pieces))
(when (= number 1)
(let ((case-fold-search t))
(save-restriction
(std11-narrow-to-header)
(goto-char (point-min))
(while (re-search-forward std11-field-head-regexp nil t)
(let ((field-start (match-beginning 0)))
(when (mime-visible-field-p
(buffer-substring field-start (match-end 0))
nil
elmo-mime-inherit-field-list-from-enclosed)
(setq header (concat
header
(buffer-substring
field-start (std11-field-end))
"\n"))))))))
(unless total
(setq total (ignore-errors
(string-to-number
(mime-content-type-parameter ct "total")))))
(when (and total
(> total 0)
(>= (length pieces) total))
(throw 'complete (cons header pieces)))))))))
;; return value
nil))
;; Replacement of mime-display-message.
(defun elmo-mime-display-as-is-internal (message
&optional preview-buffer
mother default-keymap-or-function
original-major-mode keymap)
(mime-maybe-hide-echo-buffer)
(let ((win-conf (current-window-configuration)))
(or preview-buffer
(setq preview-buffer
(concat "*Preview-" (mime-entity-name message) "*")))
(or original-major-mode
(setq original-major-mode major-mode))
(let ((inhibit-read-only t))
(set-buffer (get-buffer-create preview-buffer))
(widen)
(erase-buffer)
(if mother
(setq mime-mother-buffer mother))
(setq mime-preview-original-window-configuration win-conf)
(setq major-mode 'mime-view-mode)
(setq mode-name "MIME-View")
;; Humm...
(set-buffer-multibyte nil)
(insert (mime-entity-body message))
(set-buffer-multibyte t)
(decode-coding-region (point-min) (point-max)
elmo-mime-display-as-is-coding-system)
(goto-char (point-min))
(insert "\n")
(goto-char (point-min))
(let ((method (cdr (assq original-major-mode
mime-header-presentation-method-alist))))
(if (functionp method)
(funcall method message nil)))
;; set original major mode for mime-preview-quit
(put-text-property (point-min) (point-max)
'mime-view-situation
`((major-mode . ,original-major-mode)))
(put-text-property (point-min) (point-max)
'elmo-as-is-entity message)
(use-local-map
(or keymap
(if default-keymap-or-function
(mime-view-define-keymap default-keymap-or-function)
mime-view-mode-default-map)))
(goto-char (point-min))
(search-forward "\n\n" nil t)
(run-hooks 'mime-view-mode-hook)
(set-buffer-modified-p nil)
(setq buffer-read-only t)
preview-buffer)))
(require 'product)
(product-provide (provide 'elmo-mime) (require 'elmo-version))
;; elmo-mime.el ends here
|
