+;;; mm-extern.el --- showing message/external-body
+;; Copyright (C) 2000 Free Software Foundation, Inc.
+
+;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
+;; Keywords: message external-body
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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.
+
+;; GNU Emacs 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:
+
+(eval-when-compile
+ (require 'cl))
+
+(require 'mm-util)
+(require 'mm-decode)
+
+(defvar mm-extern-function-alist
+ '((local-file . mm-extern-local-file)
+ (url . mm-extern-url)
+ (anon-ftp . mm-extern-anon-ftp)
+ (ftp . mm-extern-ftp)
+;;; (tftp . mm-extern-tftp)
+ (mail-server . mm-extern-mail-server)
+;;; (afs . mm-extern-afs))
+ ))
+
+(defvar mm-extern-anonymous "anonymous")
+
+(defun mm-extern-local-file (handle)
+ (erase-buffer)
+ (let ((name (cdr (assq 'name (cdr (mm-handle-type handle)))))
+ (coding-system-for-read mm-binary-coding-system))
+ (unless name
+ (error "The filename is not specified."))
+ (mm-disable-multibyte-mule4)
+ (if (file-exists-p name)
+ (mm-insert-file-contents name nil nil nil nil t)
+ (error "The file is gone."))))
+
+(defun mm-extern-url (handle)
+ (erase-buffer)
+ (require 'url)
+ (let ((url (cdr (assq 'url (cdr (mm-handle-type handle)))))
+ (name buffer-file-name)
+ (coding-system-for-read mm-binary-coding-system))
+ (unless url
+ (error "URL is not specified."))
+ (mm-with-unibyte-current-buffer-mule4
+ (url-insert-file-contents url))
+ (mm-disable-multibyte-mule4)
+ (setq buffer-file-name name)))
+
+(defun mm-extern-anon-ftp (handle)
+ (erase-buffer)
+ (let* ((params (cdr (mm-handle-type handle)))
+ (name (cdr (assq 'name params)))
+ (site (cdr (assq 'site params)))
+ (directory (cdr (assq 'directory params)))
+ (mode (cdr (assq 'mode params)))
+ (path (concat "/" (or mm-extern-anonymous
+ (read-string (format "ID for %s: " site)))
+ "@" site ":" directory "/" name))
+ (coding-system-for-read mm-binary-coding-system))
+ (unless name
+ (error "The filename is not specified."))
+ (mm-disable-multibyte-mule4)
+ (mm-insert-file-contents path nil nil nil nil t)))
+
+(defun mm-extern-ftp (handle)
+ (let (mm-extern-anonymous)
+ (mm-extern-anon-ftp handle)))
+
+(defun mm-extern-mail-server (handle)
+ (require 'message)
+ (let* ((params (cdr (mm-handle-type handle)))
+ (server (cdr (assq 'server params)))
+ (subject (or (cdr (assq 'subject params)) "none"))
+ (buf (current-buffer))
+ info)
+ (if (y-or-n-p (format "Send a request message to %s?" server))
+ (save-window-excursion
+ (message-mail server subject)
+ (message-goto-body)
+ (delete-region (point) (point-max))
+ (insert-buffer buf)
+ (message "Requesting external body...")
+ (message-send-and-exit)
+ (setq info "Request is sent.")
+ (message info))
+ (setq info "Request is not sent."))
+ (goto-char (point-min))
+ (insert "[" info "]\n\n")))
+
+;;;###autoload
+(defun mm-inline-external-body (handle &optional no-display)
+ "Show the external-body part of HANDLE.
+This function replaces the buffer of HANDLE with a buffer contains
+the entire message.
+If NO-DISPLAY is nil, display it. Otherwise, do nothing after replacing."
+ (let* ((access-type (cdr (assq 'access-type
+ (cdr (mm-handle-type handle)))))
+ (func (cdr (assq (intern (downcase access-type))
+ mm-extern-function-alist)))
+ gnus-displaying-mime buf
+ handles)
+ (unless (mm-handle-cache handle)
+ (unless func
+ (error (format "Access type (%s) is not supported." access-type)))
+ (with-temp-buffer
+ (mm-insert-part handle)
+ (goto-char (point-max))
+ (insert "\n\n")
+ (setq handles (mm-dissect-buffer t)))
+ (unless (bufferp (car handles))
+ (mm-destroy-parts handles)
+ (error "Multipart external body is not supported."))
+ (save-excursion ;; single part
+ (set-buffer (setq buf (mm-handle-buffer handles)))
+ (let (good)
+ (unwind-protect
+ (progn
+ (funcall func handle)
+ (setq good t))
+ (unless good
+ (mm-destroy-parts handles))))
+ (mm-handle-set-cache handle handles))
+ (push handles gnus-article-mime-handles))
+ (unless no-display
+ (save-excursion
+ (save-restriction
+ (narrow-to-region (point) (point))
+ (gnus-display-mime (mm-handle-cache handle))
+ (mm-handle-set-undisplayer
+ handle
+ `(lambda ()
+ (let (buffer-read-only)
+ (condition-case nil
+ ;; This is only valid on XEmacs.
+ (mapcar (lambda (prop)
+ (remove-specifier
+ (face-property 'default prop) (current-buffer)))
+ '(background background-pixmap foreground))
+ (error nil))
+ (delete-region ,(point-min-marker) ,(point-max-marker))))))))))
+
+;; mm-extern.el ends here