1 ;;; mm-view.el --- functions for viewing MIME objects
2 ;; Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
5 ;; This file is part of GNU Emacs.
7 ;; GNU Emacs is free software; you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 2, or (at your option)
12 ;; GNU Emacs is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GNU Emacs; see the file COPYING. If not, write to the
19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 ;; Boston, MA 02111-1307, USA.
26 (eval-when-compile (require 'cl))
33 (autoload 'gnus-article-prepare-display "gnus-art")
34 (autoload 'vcard-parse-string "vcard")
35 (autoload 'vcard-format-string "vcard")
36 (autoload 'fill-flowed "flow-fill")
37 (unless (fboundp 'diff-mode)
38 (autoload 'diff-mode "diff-mode" "" t nil)))
41 ;;; Functions for displaying various formats inline
43 (defun mm-inline-image-emacs (handle)
44 (let ((b (point-marker))
47 (put-image (mm-get-image handle) b)
48 (mm-handle-set-undisplayer
50 `(lambda () (remove-images ,b (1+ ,b))))))
52 (defun mm-inline-image-xemacs (handle)
56 (annot (make-annotation (mm-get-image handle) nil 'text))
58 (mm-handle-set-undisplayer
61 (let (buffer-read-only)
62 (delete-annotation ,annot)
63 (delete-region ,(set-marker (make-marker) b)
64 ,(set-marker (make-marker) (point))))))
65 (set-extent-property annot 'mm t)
66 (set-extent-property annot 'duplicable t)))
69 (if (featurep 'xemacs)
70 (defalias 'mm-inline-image 'mm-inline-image-xemacs)
71 (defalias 'mm-inline-image 'mm-inline-image-emacs)))
73 (defvar mm-w3-setup nil)
81 (setq mm-w3-setup t)))
83 (defun mm-inline-text (handle)
84 (let ((type (mm-handle-media-subtype handle))
85 text buffer-read-only)
89 (setq text (mm-get-part handle))
91 (url-standalone-mode t)
93 (url-generic-parse-url (format "cid:%s" (mm-handle-id handle))))
94 (width (window-width))
95 (charset (mail-content-type-get
96 (mm-handle-type handle) 'charset)))
100 (narrow-to-region b (point))
101 (goto-char (point-min))
102 (if (or (and (boundp 'w3-meta-content-type-charset-regexp)
104 w3-meta-content-type-charset-regexp nil t))
105 (and (boundp 'w3-meta-charset-content-type-regexp)
107 w3-meta-charset-content-type-regexp nil t)))
109 (or (let ((bsubstr (buffer-substring-no-properties
112 (if (fboundp 'w3-coding-system-for-mime-charset)
113 (w3-coding-system-for-mime-charset bsubstr)
114 (mm-charset-to-coding-system bsubstr)))
116 (delete-region (point-min) (point-max))
117 (insert (mm-decode-string text charset))
118 (save-window-excursion
120 (let ((w3-strict-width width)
121 ;; Don't let w3 set the global version of
123 (fill-column fill-column)
124 (url-standalone-mode t))
126 (w3-region (point-min) (point-max))
128 (delete-region (point-min) (point-max))
130 (charset (mail-content-type-get
131 (mm-handle-type handle) 'charset)))
132 (if (or (eq charset 'gnus-decoded)
133 (eq mail-parse-charset 'gnus-decoded))
135 (narrow-to-region (point) (point))
136 (mm-insert-part handle)
137 (goto-char (point-max)))
138 (insert (mm-decode-string (mm-get-part handle)
141 "Error while rendering html; showing as text/plain"))))))
142 (mm-handle-set-undisplayer
145 (let (buffer-read-only)
146 (if (functionp 'remove-specifier)
147 (mapcar (lambda (prop)
149 (face-property 'default prop)
151 '(background background-pixmap foreground)))
152 (delete-region ,(point-min-marker)
153 ,(point-max-marker)))))))))
154 ((equal type "x-vcard")
159 (if (fboundp 'vcard-pretty-print)
160 (vcard-pretty-print (mm-get-part handle))
162 (vcard-parse-string (mm-get-part handle)
163 'vcard-standard-filter)))))))
166 (charset (mail-content-type-get
167 (mm-handle-type handle) 'charset)))
168 (if (or (eq charset 'gnus-decoded)
169 ;; This is probably not entirely correct, but
170 ;; makes rfc822 parts with embedded multiparts work.
171 (eq mail-parse-charset 'gnus-decoded))
173 (narrow-to-region (point) (point))
174 (mm-insert-part handle)
175 (goto-char (point-max)))
176 (insert (mm-decode-string (mm-get-part handle) charset)))
177 (when (and (equal type "plain")
178 (equal (cdr (assoc 'format (mm-handle-type handle)))
181 (narrow-to-region b (point))
184 (goto-char (point-max))))
186 (narrow-to-region b (point))
187 (set-text-properties (point-min) (point-max) nil)
188 (when (or (equal type "enriched")
189 (equal type "richtext"))
190 (enriched-decode (point-min) (point-max)))
191 (mm-handle-set-undisplayer
194 (let (buffer-read-only)
195 (delete-region ,(point-min-marker)
196 ,(point-max-marker)))))))))))
198 (defun mm-insert-inline (handle text)
199 "Insert TEXT inline from HANDLE."
202 (mm-handle-set-undisplayer
205 (let (buffer-read-only)
206 (delete-region ,(set-marker (make-marker) b)
207 ,(set-marker (make-marker) (point))))))))
209 (defun mm-inline-audio (handle)
210 (message "Not implemented"))
212 (defun mm-view-sound-file ()
213 (message "Not implemented"))
215 (defun mm-w3-prepare-buffer ()
217 (let ((url-standalone-mode t))
218 (w3-prepare-buffer)))
220 (defun mm-view-message ()
221 (mm-enable-multibyte)
223 (let (gnus-article-mime-handles)
224 ;; Double decode problem may happen. See mm-inline-message.
225 (run-hooks 'gnus-article-decode-hook)
226 (gnus-article-prepare-display)
227 (setq handles gnus-article-mime-handles))
229 (setq gnus-article-mime-handles
230 (mm-merge-handles gnus-article-mime-handles handles))))
232 (goto-char (point-min)))
234 (defun mm-inline-message (handle)
237 (charset (mail-content-type-get
238 (mm-handle-type handle) 'charset))
239 gnus-displaying-mime handles)
242 (setq charset (intern (downcase charset)))
243 (when (eq charset 'us-ascii)
247 (narrow-to-region b b)
248 (mm-insert-part handle)
249 (let (gnus-article-mime-handles
250 ;; disable prepare hook
251 gnus-article-prepare-hook
252 (gnus-newsgroup-charset
253 (or charset gnus-newsgroup-charset)))
254 (run-hooks 'gnus-article-decode-hook)
255 (gnus-article-prepare-display)
256 (setq handles gnus-article-mime-handles))
257 (goto-char (point-min))
260 (goto-char (point-max))
263 (insert "----------\n\n")
265 (setq gnus-article-mime-handles
266 (mm-merge-handles gnus-article-mime-handles handles)))
267 (mm-handle-set-undisplayer
270 (let (buffer-read-only)
271 (if (fboundp 'remove-specifier)
272 ;; This is only valid on XEmacs.
273 (mapcar (lambda (prop)
275 (face-property 'default prop) (current-buffer)))
276 '(background background-pixmap foreground)))
277 (delete-region ,(point-min-marker) ,(point-max-marker)))))))))
279 (defun mm-display-inline-fontify (handle mode)
281 ;; XEmacs @#$@ version of font-lock refuses to fully turn itself
282 ;; on for buffers whose name begins with " ". That's why we use
283 ;; save-current-buffer/get-buffer-create rather than
286 (set-buffer (generate-new-buffer "*fontification*"))
289 (buffer-disable-undo)
290 (mm-insert-part handle)
292 (let ((font-lock-verbose nil))
293 ;; I find font-lock a bit too verbose.
294 (font-lock-fontify-buffer))
295 ;; By default, XEmacs font-lock uses non-duplicable text
296 ;; properties. This code forces all the text properties
297 ;; to be copied along with the text.
298 (when (fboundp 'extent-list)
299 (map-extents (lambda (ext ignored)
300 (set-extent-property ext 'duplicable t)
302 nil nil nil nil nil 'text-prop))
303 (setq text (buffer-string)))
304 (kill-buffer (current-buffer))))
305 (mm-insert-inline handle text)))
307 ;; Shouldn't these functions check whether the user even wants to use
308 ;; font-lock? At least under XEmacs, this fontification is pretty
309 ;; much unconditional. Also, it would be nice to change for the size
310 ;; of the fontified region.
312 (defun mm-display-patch-inline (handle)
313 (mm-display-inline-fontify handle 'diff-mode))
315 (defun mm-display-elisp-inline (handle)
316 (mm-display-inline-fontify handle 'emacs-lisp-mode))
318 ;; id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
319 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 }
320 (defvar mm-pkcs7-signed-magic
321 (mm-string-as-unibyte
323 (mapcar 'char-to-string
324 (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
325 ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
326 ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
327 ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x02)))))
329 ;; id-envelopedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
330 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 3 }
331 (defvar mm-pkcs7-enveloped-magic
332 (mm-string-as-unibyte
334 (mapcar 'char-to-string
335 (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
336 ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
337 ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
338 ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x03)))))
340 (defun mm-view-pkcs7-get-type (handle)
341 (mm-with-unibyte-buffer
342 (mm-insert-part handle)
343 (cond ((looking-at mm-pkcs7-enveloped-magic)
345 ((looking-at mm-pkcs7-signed-magic)
348 (error "Could not identify PKCS#7 type")))))
350 (defun mm-view-pkcs7 (handle)
351 (case (mm-view-pkcs7-get-type handle)
352 (enveloped (mm-view-pkcs7-decrypt handle))
353 (otherwise (error "Unknown or unimplemented PKCS#7 type"))))
355 (defun mm-view-pkcs7-decrypt (handle)
356 (insert-buffer (mm-handle-buffer handle))
357 (goto-char (point-min))
358 (insert "MIME-Version: 1.0\n")
359 (mm-insert-headers "application/pkcs7-mime" "base64" "smime.p7m")
360 (smime-decrypt-region
361 (point-min) (point-max)
362 (if (= (length smime-keys) 1)
364 (smime-get-key-by-email
365 (completing-read "Decrypt this part with which key? "
367 (and (listp (car-safe smime-keys))
368 (caar smime-keys)))))))
372 ;;; mm-view.el ends here