112 lines
3.6 KiB
EmacsLisp
112 lines
3.6 KiB
EmacsLisp
;;; mm-archive.el --- Functions for parsing archive files as MIME -*- lexical-binding: t; -*-
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;; Copyright (C) 2012-2024 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'mm-decode)
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(autoload 'gnus-recursive-directory-files "gnus-util")
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(autoload 'gnus-get-buffer-create "gnus")
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(autoload 'mailcap-extension-to-mime "mailcap")
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(defvar mm-archive-decoders
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'(("application/ms-tnef" t "tnef" "-f" "-" "-C")
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("application/zip" nil "unzip" "-j" "-x" "%f" "-d")
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("application/x-gtar-compressed" nil "tar" "xzf" "-" "-C")
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("application/x-tar-gz" nil "tar" "xzf" "-" "-C")
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("application/x-tar" nil "tar" "xf" "-" "-C")))
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(defun mm-archive-decoders () mm-archive-decoders)
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(defun mm-dissect-archive (handle)
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(let* ((type (car (mm-handle-type handle)))
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(decoder (cddr (assoc type mm-archive-decoders)))
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dir)
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(unless decoder
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(error "No decoder found for %s" type))
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(with-file-modes #o700
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(setq dir (make-temp-file (expand-file-name "emm." mm-tmp-directory)
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'dir)))
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(unwind-protect
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(progn
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(mm-with-unibyte-buffer
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(mm-insert-part handle)
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(if (member "%f" decoder)
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(let ((file (expand-file-name "mail.zip" dir)))
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(write-region (point-min) (point-max) file nil 'silent)
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(setq decoder (copy-sequence decoder))
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(setcar (member "%f" decoder) file)
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(apply #'call-process (car decoder) nil nil nil
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(append (cdr decoder) (list dir)))
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(delete-file file))
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(apply #'call-process-region (point-min) (point-max) (car decoder)
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nil (gnus-get-buffer-create "*tnef*")
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nil (append (cdr decoder) (list dir)))))
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`("multipart/mixed"
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,handle
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,@(mm-archive-list-files (gnus-recursive-directory-files dir))))
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(delete-directory dir t))))
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(defun mm-archive-list-files (files)
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(let ((handles nil)
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type disposition)
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(dolist (file files)
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(with-temp-buffer
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(when (string-match "\\.\\([^.]+\\)$" file)
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(setq type (mailcap-extension-to-mime (match-string 1 file))))
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(unless type
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(setq type "application/octet-stream"))
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(setq disposition
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(if (string-match "^image/\\|^text/" type)
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"inline"
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"attachment"))
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(insert (format "Content-type: %s\n" type))
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(insert "Content-Transfer-Encoding: 8bit\n\n")
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(insert-file-contents file)
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(push
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(mm-make-handle (mm-copy-to-buffer)
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(list type)
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'8bit nil
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`(,disposition (filename . ,file))
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nil nil nil)
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handles)))
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handles))
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(defun mm-archive-dissect-and-inline (handle)
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(let ((start (point-marker)))
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(save-restriction
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(narrow-to-region (point) (point))
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(dolist (handle (cddr (mm-dissect-archive handle)))
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(goto-char (point-max))
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(mm-display-inline handle))
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(goto-char (point-max))
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(mm-handle-set-undisplayer
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handle
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(let ((end (point-marker)))
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(lambda ()
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(let ((inhibit-read-only t))
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(remove-images start end)
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(delete-region start end))))))))
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(provide 'mm-archive)
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;;; mm-archive.el ends here
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