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249 lines
8.3 KiB
EmacsLisp
249 lines
8.3 KiB
EmacsLisp
;;; mm-uu.el -- Return uu stuff as mm handles
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;; Copyright (c) 1998, 1999, 2000 Free Software Foundation, Inc.
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;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
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;; Keywords: postscript uudecode binhex shar forward news
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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 2, or (at your option)
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;; any later version.
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;;
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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; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;; Code:
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(eval-when-compile (require 'cl))
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(require 'mail-parse)
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(require 'nnheader)
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(require 'mm-decode)
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(require 'mailcap)
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(eval-and-compile
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(autoload 'binhex-decode-region "binhex")
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(autoload 'binhex-decode-region-external "binhex")
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(autoload 'uudecode-decode-region "uudecode")
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(autoload 'uudecode-decode-region-external "uudecode"))
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(defun mm-uu-copy-to-buffer (from to)
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"Copy the contents of the current buffer to a fresh buffer."
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(save-excursion
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(let ((obuf (current-buffer)))
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(set-buffer (generate-new-buffer " *mm-uu*"))
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(insert-buffer-substring obuf from to)
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(current-buffer))))
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;;; postscript
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(defconst mm-uu-postscript-begin-line "^%!PS-")
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(defconst mm-uu-postscript-end-line "^%%EOF$")
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(defconst mm-uu-uu-begin-line "^begin[ \t]+[0-7][0-7][0-7][ \t]+")
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(defconst mm-uu-uu-end-line "^end[ \t]*$")
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(defcustom mm-uu-decode-function 'uudecode-decode-region
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"*Function to uudecode.
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Internal function is done in elisp by default, therefore decoding may
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appear to be horribly slow. You can make Gnus use the external Unix
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decoder, such as uudecode."
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:type '(choice (const :tag "internal" uudecode-decode-region)
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(const :tag "external" uudecode-decode-region-external))
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:group 'gnus-article-mime)
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(defconst mm-uu-binhex-begin-line
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"^:...............................................................$")
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(defconst mm-uu-binhex-end-line ":$")
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(defcustom mm-uu-binhex-decode-function 'binhex-decode-region
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"*Function to binhex decode.
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Internal function is done in elisp by default, therefore decoding may
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appear to be horribly slow. You can make Gnus use the external Unix
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decoder, such as hexbin."
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:type '(choice (const :tag "internal" binhex-decode-region)
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(const :tag "external" binhex-decode-region-external))
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:group 'gnus-article-mime)
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(defconst mm-uu-shar-begin-line "^#! */bin/sh")
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(defconst mm-uu-shar-end-line "^exit 0\\|^$")
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;;; Thanks to Edward J. Sabol <sabol@alderaan.gsfc.nasa.gov> and
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;;; Peter von der Ah\'e <pahe@daimi.au.dk>
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(defconst mm-uu-forward-begin-line "^-+ \\(Start of \\)?Forwarded message")
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(defconst mm-uu-forward-end-line "^-+ End \\(of \\)?forwarded message")
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(defvar mm-uu-begin-line nil)
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(defconst mm-uu-identifier-alist
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'((?% . postscript) (?b . uu) (?: . binhex) (?# . shar)
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(?- . forward)))
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(defvar mm-dissect-disposition "inline"
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"The default disposition of uu parts.
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This can be either \"inline\" or \"attachment\".")
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(defcustom mm-uu-configure-list nil
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"A list of mm-uu configuration.
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To disable dissecting shar codes, for instance, add
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`(shar . disabled)' to this list."
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:type '(repeat (choice (const :tag "postscript" (postscript . disabled))
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(const :tag "uu" (uu . disabled))
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(const :tag "binhax" (binhex . disabled))
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(const :tag "shar" (shar . disabled))
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(const :tag "forward" (forward . disabled))))
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:group 'gnus-article-mime
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:set 'mm-uu-configure)
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(defun mm-uu-configure-p (key val)
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(member (cons key val) mm-uu-configure-list))
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(defun mm-uu-configure (&optional symbol value)
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(if symbol (set-default symbol value))
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(setq mm-uu-begin-line nil)
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(mapcar '(lambda (type)
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(if (mm-uu-configure-p type 'disabled)
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nil
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(setq mm-uu-begin-line
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(concat mm-uu-begin-line
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(if mm-uu-begin-line "\\|")
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(symbol-value
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(intern (concat "mm-uu-" (symbol-name type)
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"-begin-line")))))))
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'(uu postscript binhex shar forward)))
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(mm-uu-configure)
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;;;### autoload
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(defun mm-uu-dissect ()
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"Dissect the current buffer and return a list of uu handles."
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(let (text-start start-char end-char
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type file-name end-line result text-plain-type
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start-char-1 end-char-1
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(case-fold-search t))
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(save-excursion
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(save-restriction
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(mail-narrow-to-head)
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(goto-char (point-max)))
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(forward-line)
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;;; gnus-decoded is a fake charset, which means no further
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;;; decoding.
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(setq text-start (point)
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text-plain-type '("text/plain" (charset . gnus-decoded)))
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(while (re-search-forward mm-uu-begin-line nil t)
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(setq start-char (match-beginning 0))
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(setq type (cdr (assq (aref (match-string 0) 0)
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mm-uu-identifier-alist)))
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(setq file-name
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(if (and (eq type 'uu)
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(looking-at "\\(.+\\)$"))
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(and (match-string 1)
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(let ((nnheader-file-name-translation-alist
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'((?/ . ?,) (? . ?_) (?* . ?_) (?$ . ?_))))
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(nnheader-translate-file-chars (match-string 1))))))
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(forward-line);; in case of failure
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(setq start-char-1 (point))
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(setq end-line (symbol-value
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(intern (concat "mm-uu-" (symbol-name type)
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"-end-line"))))
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(when (and (re-search-forward end-line nil t)
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(not (eq (match-beginning 0) (match-end 0))))
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(setq end-char-1 (match-beginning 0))
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(forward-line)
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(setq end-char (point))
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(when (cond
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((eq type 'binhex)
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(setq file-name
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(ignore-errors
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(binhex-decode-region start-char end-char t))))
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((eq type 'forward)
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(save-excursion
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(goto-char start-char-1)
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(looking-at "[\r\n]*[a-zA-Z][a-zA-Z0-9-]*:")))
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(t t))
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(if (> start-char text-start)
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(push
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(mm-make-handle (mm-uu-copy-to-buffer text-start start-char)
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text-plain-type)
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result))
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(push
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(cond
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((eq type 'postscript)
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(mm-make-handle (mm-uu-copy-to-buffer start-char end-char)
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'("application/postscript")))
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((eq type 'forward)
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(mm-make-handle (mm-uu-copy-to-buffer start-char-1 end-char-1)
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'("message/rfc822" (charset . gnus-decoded))))
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((eq type 'uu)
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(mm-make-handle (mm-uu-copy-to-buffer start-char end-char)
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(list (or (and file-name
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(string-match "\\.[^\\.]+$"
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file-name)
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(mailcap-extension-to-mime
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(match-string 0 file-name)))
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"application/octet-stream"))
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'x-uuencode nil
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(if (and file-name (not (equal file-name "")))
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(list mm-dissect-disposition
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(cons 'filename file-name)))))
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((eq type 'binhex)
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(mm-make-handle (mm-uu-copy-to-buffer start-char end-char)
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(list (or (and file-name
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(string-match "\\.[^\\.]+$" file-name)
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(mailcap-extension-to-mime
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(match-string 0 file-name)))
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"application/octet-stream"))
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'x-binhex nil
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(if (and file-name (not (equal file-name "")))
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(list mm-dissect-disposition
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(cons 'filename file-name)))))
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((eq type 'shar)
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(mm-make-handle (mm-uu-copy-to-buffer start-char end-char)
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'("application/x-shar"))))
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result)
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(setq text-start end-char))))
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(when result
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(if (> (point-max) (1+ text-start))
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(push
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(mm-make-handle (mm-uu-copy-to-buffer text-start (point-max))
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text-plain-type)
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result))
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(setq result (cons "multipart/mixed" (nreverse result))))
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result)))
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;;;### autoload
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(defun mm-uu-test ()
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"Check whether the current buffer contains uu stuff."
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(save-excursion
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(goto-char (point-min))
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(let (type end-line result
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(case-fold-search t))
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(while (and mm-uu-begin-line
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(not result) (re-search-forward mm-uu-begin-line nil t))
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(forward-line)
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(setq type (cdr (assq (aref (match-string 0) 0)
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mm-uu-identifier-alist)))
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(setq end-line (symbol-value
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(intern (concat "mm-uu-" (symbol-name type)
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"-end-line"))))
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(if (and (re-search-forward end-line nil t)
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(not (eq (match-beginning 0) (match-end 0))))
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(setq result t)))
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result)))
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(provide 'mm-uu)
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;;; mm-uu.el ends here
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