1 ;;; mm-view.el --- functions for viewing MIME objects
2 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002 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
44 (defun mm-inline-image-emacs (handle)
45 (let ((b (point-marker))
48 (put-image (mm-get-image handle) b)
49 (mm-handle-set-undisplayer
51 `(lambda () (remove-images ,b (1+ ,b))))))
53 (defun mm-inline-image-xemacs (handle)
57 (annot (make-annotation (mm-get-image handle) nil 'text))
59 (mm-handle-set-undisplayer
62 (let (buffer-read-only)
63 (delete-annotation ,annot)
64 (delete-region ,(set-marker (make-marker) b)
65 ,(set-marker (make-marker) (point))))))
66 (set-extent-property annot 'mm t)
67 (set-extent-property annot 'duplicable t)))
70 (if (featurep 'xemacs)
71 (defalias 'mm-inline-image 'mm-inline-image-xemacs)
72 (defalias 'mm-inline-image 'mm-inline-image-emacs)))
74 (defvar mm-w3-setup nil)
82 (setq mm-w3-setup t)))
84 (defun mm-inline-text-html-render-with-w3 (handle)
86 (let ((text (mm-get-part handle))
88 (url-standalone-mode t)
89 (w3-honor-stylesheets nil)
90 (w3-delay-image-loads t)
92 (url-generic-parse-url (format "cid:%s" (mm-handle-id handle))))
93 (width (window-width))
94 (charset (mail-content-type-get
95 (mm-handle-type handle) 'charset)))
99 (narrow-to-region b (point))
100 (goto-char (point-min))
101 (if (or (and (boundp 'w3-meta-content-type-charset-regexp)
103 w3-meta-content-type-charset-regexp nil t))
104 (and (boundp 'w3-meta-charset-content-type-regexp)
106 w3-meta-charset-content-type-regexp nil t)))
108 (or (let ((bsubstr (buffer-substring-no-properties
111 (if (fboundp 'w3-coding-system-for-mime-charset)
112 (w3-coding-system-for-mime-charset bsubstr)
113 (mm-charset-to-coding-system bsubstr)))
115 (delete-region (point-min) (point-max))
116 (insert (mm-decode-string text charset))
117 (save-window-excursion
119 (let ((w3-strict-width width)
120 ;; Don't let w3 set the global version of
122 (fill-column fill-column)
123 (w3-honor-stylesheets nil)
124 (w3-delay-image-loads t)
125 (url-standalone-mode t))
127 (w3-region (point-min) (point-max))
129 (delete-region (point-min) (point-max))
131 (charset (mail-content-type-get
132 (mm-handle-type handle) 'charset)))
133 (if (or (eq charset 'gnus-decoded)
134 (eq mail-parse-charset 'gnus-decoded))
136 (narrow-to-region (point) (point))
137 (mm-insert-part handle)
138 (goto-char (point-max)))
139 (insert (mm-decode-string (mm-get-part handle)
142 "Error while rendering html; showing as text/plain"))))))
143 (mm-handle-set-undisplayer
146 (let (buffer-read-only)
147 (if (functionp 'remove-specifier)
148 (mapcar (lambda (prop)
150 (face-property 'default prop)
152 '(background background-pixmap foreground)))
153 (delete-region ,(point-min-marker)
154 ,(point-max-marker)))))))))
156 (defvar mm-w3m-minor-mode nil)
157 (make-variable-buffer-local 'mm-w3m-minor-mode)
158 (defvar mm-w3m-setup nil)
159 (defun mm-setup-w3m ()
162 (gnus-add-minor-mode 'mm-w3m-minor-mode " w3m" w3m-mode-map)
163 (setq mm-w3m-setup t)))
165 (defun mm-inline-text-html-render-with-w3m (handle)
167 (let ((text (mm-get-part handle))
169 (charset (mail-content-type-get (mm-handle-type handle) 'charset)))
173 (narrow-to-region b (point))
174 (goto-char (point-min))
175 (when (re-search-forward w3m-meta-content-type-charset-regexp nil t)
176 (setq charset (or (w3m-charset-to-coding-system (match-string 2))
179 (delete-region (point-min) (point-max))
180 (insert (mm-decode-string text charset)))
181 (w3m-region (point-min) (point-max))
182 (setq mm-w3m-minor-mode t))
183 (mm-handle-set-undisplayer
186 (let (buffer-read-only)
187 (setq mm-w3m-minor-mode nil)
188 (if (functionp 'remove-specifier)
189 (mapcar (lambda (prop)
191 (face-property 'default prop)
193 '(background background-pixmap foreground)))
194 (delete-region ,(point-min-marker)
195 ,(point-max-marker))))))))
197 (defun mm-inline-text (handle)
198 (let ((type (mm-handle-media-subtype handle))
202 (funcall mm-inline-text-html-renderer handle))
203 ((equal type "x-vcard")
208 (if (fboundp 'vcard-pretty-print)
209 (vcard-pretty-print (mm-get-part handle))
211 (vcard-parse-string (mm-get-part handle)
212 'vcard-standard-filter)))))))
215 (charset (mail-content-type-get
216 (mm-handle-type handle) 'charset)))
217 (if (or (eq charset 'gnus-decoded)
218 ;; This is probably not entirely correct, but
219 ;; makes rfc822 parts with embedded multiparts work.
220 (eq mail-parse-charset 'gnus-decoded))
222 (narrow-to-region (point) (point))
223 (mm-insert-part handle)
224 (goto-char (point-max)))
225 (insert (mm-decode-string (mm-get-part handle) charset)))
226 (when (and (equal type "plain")
227 (equal (cdr (assoc 'format (mm-handle-type handle)))
230 (narrow-to-region b (point))
233 (goto-char (point-max))))
235 (narrow-to-region b (point))
236 (set-text-properties (point-min) (point-max) nil)
237 (when (or (equal type "enriched")
238 (equal type "richtext"))
239 (enriched-decode (point-min) (point-max)))
240 (mm-handle-set-undisplayer
243 (let (buffer-read-only)
244 (delete-region ,(point-min-marker)
245 ,(point-max-marker)))))))))))
247 (defun mm-insert-inline (handle text)
248 "Insert TEXT inline from HANDLE."
251 (mm-handle-set-undisplayer
254 (let (buffer-read-only)
255 (delete-region ,(set-marker (make-marker) b)
256 ,(set-marker (make-marker) (point))))))))
258 (defun mm-inline-audio (handle)
259 (message "Not implemented"))
261 (defun mm-view-sound-file ()
262 (message "Not implemented"))
264 (defun mm-w3-prepare-buffer ()
266 (let ((url-standalone-mode t)
267 (w3-honor-stylesheets nil)
268 (w3-delay-image-loads t))
269 (w3-prepare-buffer)))
271 (defun mm-view-message ()
272 (mm-enable-multibyte)
274 (let (gnus-article-mime-handles)
275 ;; Double decode problem may happen. See mm-inline-message.
276 (run-hooks 'gnus-article-decode-hook)
277 (gnus-article-prepare-display)
278 (setq handles gnus-article-mime-handles))
280 (setq gnus-article-mime-handles
281 (mm-merge-handles gnus-article-mime-handles handles))))
283 (goto-char (point-min)))
285 (defun mm-inline-message (handle)
288 (charset (mail-content-type-get
289 (mm-handle-type handle) 'charset))
290 gnus-displaying-mime handles)
293 (setq charset (intern (downcase charset)))
294 (when (eq charset 'us-ascii)
298 (narrow-to-region b b)
299 (mm-insert-part handle)
300 (let (gnus-article-mime-handles
301 ;; disable prepare hook
302 gnus-article-prepare-hook
303 (gnus-newsgroup-charset
304 (or charset gnus-newsgroup-charset)))
305 (run-hooks 'gnus-article-decode-hook)
306 (gnus-article-prepare-display)
307 (setq handles gnus-article-mime-handles))
308 (goto-char (point-min))
311 (goto-char (point-max))
314 (insert "----------\n\n")
316 (setq gnus-article-mime-handles
317 (mm-merge-handles gnus-article-mime-handles handles)))
318 (mm-handle-set-undisplayer
321 (let (buffer-read-only)
322 (if (fboundp 'remove-specifier)
323 ;; This is only valid on XEmacs.
324 (mapcar (lambda (prop)
326 (face-property 'default prop) (current-buffer)))
327 '(background background-pixmap foreground)))
328 (delete-region ,(point-min-marker) ,(point-max-marker)))))))))
330 (defun mm-display-inline-fontify (handle mode)
332 ;; XEmacs @#$@ version of font-lock refuses to fully turn itself
333 ;; on for buffers whose name begins with " ". That's why we use
334 ;; save-current-buffer/get-buffer-create rather than
337 (set-buffer (generate-new-buffer "*fontification*"))
340 (buffer-disable-undo)
341 (mm-insert-part handle)
344 (let ((font-lock-verbose nil))
345 ;; I find font-lock a bit too verbose.
346 (font-lock-fontify-buffer))
347 ;; By default, XEmacs font-lock uses non-duplicable text
348 ;; properties. This code forces all the text properties
349 ;; to be copied along with the text.
350 (when (fboundp 'extent-list)
351 (map-extents (lambda (ext ignored)
352 (set-extent-property ext 'duplicable t)
354 nil nil nil nil nil 'text-prop))
355 (setq text (buffer-string)))
356 (kill-buffer (current-buffer))))
357 (mm-insert-inline handle text)))
359 ;; Shouldn't these functions check whether the user even wants to use
360 ;; font-lock? At least under XEmacs, this fontification is pretty
361 ;; much unconditional. Also, it would be nice to change for the size
362 ;; of the fontified region.
364 (defun mm-display-patch-inline (handle)
365 (mm-display-inline-fontify handle 'diff-mode))
367 (defun mm-display-elisp-inline (handle)
368 (mm-display-inline-fontify handle 'emacs-lisp-mode))
370 ;; id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
371 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 }
372 (defvar mm-pkcs7-signed-magic
373 (mm-string-as-unibyte
375 (mapcar 'char-to-string
376 (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
377 ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
378 ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
379 ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x02)))))
381 ;; id-envelopedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
382 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 3 }
383 (defvar mm-pkcs7-enveloped-magic
384 (mm-string-as-unibyte
386 (mapcar 'char-to-string
387 (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
388 ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
389 ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
390 ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x03)))))
392 (defun mm-view-pkcs7-get-type (handle)
393 (mm-with-unibyte-buffer
394 (mm-insert-part handle)
395 (cond ((looking-at mm-pkcs7-enveloped-magic)
397 ((looking-at mm-pkcs7-signed-magic)
400 (error "Could not identify PKCS#7 type")))))
402 (defun mm-view-pkcs7 (handle)
403 (case (mm-view-pkcs7-get-type handle)
404 (enveloped (mm-view-pkcs7-decrypt handle))
405 (otherwise (error "Unknown or unimplemented PKCS#7 type"))))
407 (defun mm-view-pkcs7-decrypt (handle)
408 (insert-buffer (mm-handle-buffer handle))
409 (goto-char (point-min))
410 (insert "MIME-Version: 1.0\n")
411 (mm-insert-headers "application/pkcs7-mime" "base64" "smime.p7m")
412 (smime-decrypt-region
413 (point-min) (point-max)
414 (if (= (length smime-keys) 1)
416 (smime-get-key-by-email
417 (completing-read "Decrypt this part with which key? "
419 (and (listp (car-safe smime-keys))
420 (caar smime-keys)))))))
424 ;;; mm-view.el ends here