--- /dev/null
+;;; mm-archive.el --- Functions for parsing archive files as MIME
+
+;; Copyright (C) 2012-2016 Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
+;; 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'mm-decode)
+(autoload 'gnus-recursive-directory-files "gnus-util")
+(autoload 'mailcap-extension-to-mime "mailcap")
+
+(defvar mm-archive-decoders
+ '(("application/ms-tnef" t "tnef" "-f" "-" "-C")
+ ("application/zip" nil "unzip" "-j" "-x" "%f" "-d")
+ ("application/x-gtar-compressed" nil "tar" "xzf" "-" "-C")
+ ("application/x-tar" nil "tar" "xf" "-" "-C")))
+
+(defun mm-archive-decoders () mm-archive-decoders)
+
+(defun mm-dissect-archive (handle)
+ (let ((decoder (cddr (assoc (car (mm-handle-type handle))
+ mm-archive-decoders)))
+ (dir (mm-make-temp-file
+ (expand-file-name "emm." mm-tmp-directory) 'dir)))
+ (set-file-modes dir #o700)
+ (unwind-protect
+ (progn
+ (mm-with-unibyte-buffer
+ (mm-insert-part handle)
+ (if (member "%f" decoder)
+ (let ((file (expand-file-name "mail.zip" dir)))
+ (write-region (point-min) (point-max) file nil 'silent)
+ (setq decoder (copy-sequence decoder))
+ (setcar (member "%f" decoder) file)
+ (apply 'call-process (car decoder) nil nil nil
+ (append (cdr decoder) (list dir)))
+ (delete-file file))
+ (apply 'call-process-region (point-min) (point-max) (car decoder)
+ nil (get-buffer-create "*tnef*")
+ nil (append (cdr decoder) (list dir)))))
+ `("multipart/mixed"
+ ,handle
+ ,@(mm-archive-list-files (gnus-recursive-directory-files dir))))
+ (delete-directory dir t))))
+
+(defun mm-archive-list-files (files)
+ (let ((handles nil)
+ type disposition)
+ (dolist (file files)
+ (with-temp-buffer
+ (when (string-match "\\.\\([^.]+\\)$" file)
+ (setq type (mailcap-extension-to-mime (match-string 1 file))))
+ (unless type
+ (setq type "application/octet-stream"))
+ (setq disposition
+ (if (string-match "^image/\\|^text/" type)
+ "inline"
+ "attachment"))
+ (insert (format "Content-type: %s\n" type))
+ (insert "Content-Transfer-Encoding: 8bit\n\n")
+ (insert-file-contents file)
+ (push
+ (mm-make-handle (mm-copy-to-buffer)
+ (list type)
+ '8bit nil
+ `(,disposition (filename . ,file))
+ nil nil nil)
+ handles)))
+ handles))
+
+(defun mm-archive-dissect-and-inline (handle)
+ (let ((start (point-marker)))
+ (save-restriction
+ (narrow-to-region (point) (point))
+ (dolist (handle (cddr (mm-dissect-archive handle)))
+ (goto-char (point-max))
+ (mm-display-inline handle))
+ (goto-char (point-max))
+ (mm-handle-set-undisplayer
+ handle
+ `(lambda ()
+ (let ((inhibit-read-only t)
+ (end ,(point-marker)))
+ (remove-images ,start end)
+ (delete-region ,start end)))))))
+
+(provide 'mm-archive)
+
+;; mm-archive.el ends here