1 ;;; mm-view.el --- functions for viewing MIME objects
2 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 ;; Free Software Foundation, Inc.
5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
6 ;; This file is part of GNU Emacs.
8 ;; GNU Emacs is free software; you can redistribute it and/or modify
9 ;; it under the terms of the GNU General Public License as published by
10 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; GNU Emacs is distributed in the hope that it will be useful,
14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;; GNU General Public License for more details.
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GNU Emacs; see the file COPYING. If not, write to the
20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 ;; Boston, MA 02111-1307, USA.
27 (eval-when-compile (require 'cl
))
34 (autoload 'gnus-article-prepare-display
"gnus-art")
35 (autoload 'vcard-parse-string
"vcard")
36 (autoload 'vcard-format-string
"vcard")
37 (autoload 'fill-flowed
"flow-fill")
38 (autoload 'html2text
"html2text")
39 (unless (fboundp 'diff-mode
)
40 (autoload 'diff-mode
"diff-mode" "" t nil
)))
42 (defvar mm-text-html-renderer-alist
43 '((w3 . mm-inline-text-html-render-with-w3
)
44 (w3m . mm-inline-text-html-render-with-w3m
)
45 (w3m-standalone mm-inline-render-with-stdin nil
46 "w3m" "-dump" "-T" "text/html")
47 (links mm-inline-render-with-file
48 mm-links-remove-leading-blank
50 (lynx mm-inline-render-with-stdin nil
51 "lynx" "-dump" "-force_html" "-stdin" "-nolist")
52 (html2text mm-inline-render-with-function html2text
))
53 "The attributes of renderer types for text/html.")
55 (defvar mm-text-html-washer-alist
56 '((w3 . gnus-article-wash-html-with-w3
)
57 (w3m . gnus-article-wash-html-with-w3m
)
58 (w3m-standalone mm-inline-wash-with-stdin nil
59 "w3m" "-dump" "-T" "text/html")
60 (links mm-inline-wash-with-file
61 mm-links-remove-leading-blank
63 (lynx mm-inline-wash-with-stdin nil
64 "lynx" "-dump" "-force_html" "-stdin" "-nolist")
65 (html2text html2text
))
66 "The attributes of washer types for text/html.")
68 ;;; Internal variables.
71 ;;; Functions for displaying various formats inline
74 (defun mm-inline-image-emacs (handle)
75 (let ((b (point-marker))
77 (put-image (mm-get-image handle
) b
)
79 (mm-handle-set-undisplayer
85 (delete-region b
(+ b
2)))))))
87 (defun mm-inline-image-xemacs (handle)
90 (let ((annot (make-annotation (mm-get-image handle
) nil
'text
))
92 (mm-handle-set-undisplayer
95 (let ((b ,(point-marker))
97 (delete-annotation ,annot
)
98 (delete-region (- b
2) b
))))
99 (set-extent-property annot
'mm t
)
100 (set-extent-property annot
'duplicable t
)))
103 (if (featurep 'xemacs
)
104 (defalias 'mm-inline-image
'mm-inline-image-xemacs
)
105 (defalias 'mm-inline-image
'mm-inline-image-emacs
)))
107 (defvar mm-w3-setup nil
)
108 (defun mm-setup-w3 ()
115 (setq mm-w3-setup t
)))
117 (defun mm-inline-text-html-render-with-w3 (handle)
119 (let ((text (mm-get-part handle
))
121 (url-standalone-mode t
)
122 (url-gateway-unplugged t
)
123 (w3-honor-stylesheets nil
)
125 (url-generic-parse-url (format "cid:%s" (mm-handle-id handle
))))
126 (width (window-width))
127 (charset (mail-content-type-get
128 (mm-handle-type handle
) 'charset
)))
132 (narrow-to-region b
(point))
133 (goto-char (point-min))
134 (if (or (and (boundp 'w3-meta-content-type-charset-regexp
)
136 w3-meta-content-type-charset-regexp nil t
))
137 (and (boundp 'w3-meta-charset-content-type-regexp
)
139 w3-meta-charset-content-type-regexp nil t
)))
141 (or (let ((bsubstr (buffer-substring-no-properties
144 (if (fboundp 'w3-coding-system-for-mime-charset
)
145 (w3-coding-system-for-mime-charset bsubstr
)
146 (mm-charset-to-coding-system bsubstr
)))
148 (delete-region (point-min) (point-max))
149 (insert (mm-decode-string text charset
))
150 (save-window-excursion
152 (let ((w3-strict-width width
)
153 ;; Don't let w3 set the global version of
155 (fill-column fill-column
))
156 (if (or debug-on-error debug-on-quit
)
157 (w3-region (point-min) (point-max))
159 (w3-region (point-min) (point-max))
161 (delete-region (point-min) (point-max))
163 (charset (mail-content-type-get
164 (mm-handle-type handle
) 'charset
)))
165 (if (or (eq charset
'gnus-decoded
)
166 (eq mail-parse-charset
'gnus-decoded
))
168 (narrow-to-region (point) (point))
169 (mm-insert-part handle
)
170 (goto-char (point-max)))
171 (insert (mm-decode-string (mm-get-part handle
)
174 "Error while rendering html; showing as text/plain")))))))
175 (mm-handle-set-undisplayer
178 (let (buffer-read-only)
179 (if (functionp 'remove-specifier
)
180 (mapcar (lambda (prop)
182 (face-property 'default prop
)
184 '(background background-pixmap foreground
)))
185 (delete-region ,(point-min-marker)
186 ,(point-max-marker)))))))))
188 (defvar mm-w3m-setup nil
189 "Whether gnus-article-mode has been setup to use emacs-w3m.")
191 (defun mm-setup-w3m ()
192 "Setup gnus-article-mode to use emacs-w3m."
195 (unless (assq 'gnus-article-mode w3m-cid-retrieve-function-alist
)
196 (push (cons 'gnus-article-mode
'mm-w3m-cid-retrieve
)
197 w3m-cid-retrieve-function-alist
))
198 (setq mm-w3m-setup t
))
199 (setq w3m-display-inline-images mm-inline-text-html-with-images
))
201 (defun mm-w3m-cid-retrieve-1 (url handle
)
202 (if (mm-multiple-handles handle
)
203 (dolist (elem handle
)
204 (mm-w3m-cid-retrieve-1 url elem
))
205 (when (and (listp handle
)
206 (equal url
(mm-handle-id handle
)))
207 (mm-insert-part handle
)
208 (throw 'found-handle
(mm-handle-media-type handle
)))))
210 (defun mm-w3m-cid-retrieve (url &rest args
)
211 "Insert a content pointed by URL if it has the cid: scheme."
212 (when (string-match "\\`cid:" url
)
214 (mm-w3m-cid-retrieve-1 (concat "<" (substring url
(match-end 0)) ">")
215 (with-current-buffer w3m-current-buffer
216 gnus-article-mime-handles
)))))
218 (defun mm-inline-text-html-render-with-w3m (handle)
219 "Render a text/html part using emacs-w3m."
221 (let ((text (mm-get-part handle
))
223 (charset (mail-content-type-get (mm-handle-type handle
) 'charset
)))
225 (insert (if charset
(mm-decode-string text charset
) text
))
227 (narrow-to-region b
(point))
229 (goto-char (point-min))
230 (when (setq charset
(w3m-detect-meta-charset))
231 (delete-region (point-min) (point-max))
232 (insert (mm-decode-string text charset
))))
233 (let ((w3m-safe-url-regexp mm-w3m-safe-url-regexp
)
235 (w3m-region (point-min) (point-max) nil charset
))
236 (when (and mm-inline-text-html-with-w3m-keymap
237 (boundp 'w3m-minor-mode-map
)
240 (point-min) (point-max)
241 (list 'keymap w3m-minor-mode-map
242 ;; Put the mark meaning this part was rendered by emacs-w3m.
243 'mm-inline-text-html-with-w3m t
))))
244 (mm-handle-set-undisplayer
247 (let (buffer-read-only)
248 (if (functionp 'remove-specifier
)
249 (mapcar (lambda (prop)
251 (face-property 'default prop
)
253 '(background background-pixmap foreground
)))
254 (delete-region ,(point-min-marker)
255 ,(point-max-marker))))))))
257 (defun mm-links-remove-leading-blank ()
258 ;; Delete the annoying three spaces preceding each line of links
260 (goto-char (point-min))
261 (while (re-search-forward "^ " nil t
)
262 (delete-region (match-beginning 0) (match-end 0))))
264 (defun mm-inline-wash-with-file (post-func cmd
&rest args
)
265 (let ((file (mm-make-temp-file
266 (expand-file-name "mm" mm-tmp-directory
))))
267 (let ((coding-system-for-write 'binary
))
268 (write-region (point-min) (point-max) file nil
'silent
))
269 (delete-region (point-min) (point-max))
271 (apply 'call-process cmd nil t nil
(mapcar 'eval args
))
273 (and post-func
(funcall post-func
))))
275 (defun mm-inline-wash-with-stdin (post-func cmd
&rest args
)
276 (let ((coding-system-for-write 'binary
))
277 (apply 'call-process-region
(point-min) (point-max)
279 (and post-func
(funcall post-func
)))
281 (defun mm-inline-render-with-file (handle post-func cmd
&rest args
)
282 (let ((source (mm-get-part handle
)))
285 (mm-with-unibyte-buffer
287 (apply 'mm-inline-wash-with-file post-func cmd args
)
290 (defun mm-inline-render-with-stdin (handle post-func cmd
&rest args
)
291 (let ((source (mm-get-part handle
)))
294 (mm-with-unibyte-buffer
296 (apply 'mm-inline-wash-with-stdin post-func cmd args
)
299 (defun mm-inline-render-with-function (handle func
&rest args
)
300 (let ((source (mm-get-part handle
))
301 (charset (mail-content-type-get (mm-handle-type handle
) 'charset
)))
304 (mm-with-multibyte-buffer
306 (mm-decode-string source charset
)
311 (defun mm-inline-text-html (handle)
312 (let* ((func (or mm-inline-text-html-renderer mm-text-html-renderer
))
313 (entry (assq func mm-text-html-renderer-alist
))
316 (setq func
(cdr entry
)))
319 (funcall func handle
))
321 (apply (car func
) handle
(cdr func
))))))
323 (defun mm-inline-text-vcard (handle)
324 (let (buffer-read-only)
329 (if (fboundp 'vcard-pretty-print
)
330 (vcard-pretty-print (mm-get-part handle
))
332 (vcard-parse-string (mm-get-part handle
)
333 'vcard-standard-filter
))))))))
335 (defun mm-inline-text (handle)
337 (type (mm-handle-media-subtype handle
))
338 (charset (mail-content-type-get
339 (mm-handle-type handle
) 'charset
))
341 (if (or (eq charset
'gnus-decoded
)
342 ;; This is probably not entirely correct, but
343 ;; makes rfc822 parts with embedded multiparts work.
344 (eq mail-parse-charset
'gnus-decoded
))
346 (narrow-to-region (point) (point))
347 (mm-insert-part handle
)
348 (goto-char (point-max)))
349 (insert (mm-decode-string (mm-get-part handle
) charset
)))
350 (when (and (equal type
"plain")
351 (equal (cdr (assoc 'format
(mm-handle-type handle
)))
354 (narrow-to-region b
(point))
357 (goto-char (point-max))))
359 (narrow-to-region b
(point))
360 (set-text-properties (point-min) (point-max) nil
)
361 (when (or (equal type
"enriched")
362 (equal type
"richtext"))
364 (enriched-decode (point-min) (point-max))))
365 (mm-handle-set-undisplayer
368 (let (buffer-read-only)
369 (delete-region ,(point-min-marker)
370 ,(point-max-marker))))))))
372 (defun mm-insert-inline (handle text
)
373 "Insert TEXT inline from HANDLE."
376 (mm-handle-set-undisplayer
379 (let (buffer-read-only)
380 (delete-region ,(set-marker (make-marker) b
)
381 ,(set-marker (make-marker) (point))))))))
383 (defun mm-inline-audio (handle)
384 (message "Not implemented"))
386 (defun mm-view-sound-file ()
387 (message "Not implemented"))
389 (defun mm-w3-prepare-buffer ()
391 (let ((url-standalone-mode t
)
392 (url-gateway-unplugged t
)
393 (w3-honor-stylesheets nil
))
394 (w3-prepare-buffer)))
396 (defun mm-view-message ()
397 (mm-enable-multibyte)
399 (let (gnus-article-mime-handles)
400 ;; Double decode problem may happen. See mm-inline-message.
401 (run-hooks 'gnus-article-decode-hook
)
402 (gnus-article-prepare-display)
403 (setq handles gnus-article-mime-handles
))
405 (setq gnus-article-mime-handles
406 (mm-merge-handles gnus-article-mime-handles handles
))))
408 (goto-char (point-min)))
410 (defun mm-inline-message (handle)
413 (charset (mail-content-type-get
414 (mm-handle-type handle
) 'charset
))
415 gnus-displaying-mime handles
)
418 (setq charset
(intern (downcase charset
)))
419 (when (eq charset
'us-ascii
)
423 (narrow-to-region b b
)
424 (mm-insert-part handle
)
425 (let (gnus-article-mime-handles
426 ;; disable prepare hook
427 gnus-article-prepare-hook
428 (gnus-newsgroup-charset
429 (or charset gnus-newsgroup-charset
)))
430 (let ((gnus-original-article-buffer (mm-handle-buffer handle
)))
431 (run-hooks 'gnus-article-decode-hook
))
432 (gnus-article-prepare-display)
433 (setq handles gnus-article-mime-handles
))
434 (goto-char (point-min))
437 (goto-char (point-max))
440 (insert "----------\n\n")
442 (setq gnus-article-mime-handles
443 (mm-merge-handles gnus-article-mime-handles handles
)))
444 (mm-handle-set-undisplayer
447 (let (buffer-read-only)
448 (if (fboundp 'remove-specifier
)
449 ;; This is only valid on XEmacs.
450 (mapcar (lambda (prop)
452 (face-property 'default prop
) (current-buffer)))
453 '(background background-pixmap foreground
)))
454 (delete-region ,(point-min-marker) ,(point-max-marker)))))))))
456 (defun mm-display-inline-fontify (handle mode
)
458 ;; XEmacs @#$@ version of font-lock refuses to fully turn itself
459 ;; on for buffers whose name begins with " ". That's why we use
460 ;; save-current-buffer/get-buffer-create rather than
463 (set-buffer (generate-new-buffer "*fontification*"))
466 (buffer-disable-undo)
467 (mm-insert-part handle
)
470 (let ((font-lock-verbose nil
))
471 ;; I find font-lock a bit too verbose.
472 (font-lock-fontify-buffer))
473 ;; By default, XEmacs font-lock uses non-duplicable text
474 ;; properties. This code forces all the text properties
475 ;; to be copied along with the text.
476 (when (fboundp 'extent-list
)
477 (map-extents (lambda (ext ignored
)
478 (set-extent-property ext
'duplicable t
)
480 nil nil nil nil nil
'text-prop
))
481 (setq text
(buffer-string)))
482 (kill-buffer (current-buffer))))
483 (mm-insert-inline handle text
)))
485 ;; Shouldn't these functions check whether the user even wants to use
486 ;; font-lock? At least under XEmacs, this fontification is pretty
487 ;; much unconditional. Also, it would be nice to change for the size
488 ;; of the fontified region.
490 (defun mm-display-patch-inline (handle)
491 (mm-display-inline-fontify handle
'diff-mode
))
493 (defun mm-display-elisp-inline (handle)
494 (mm-display-inline-fontify handle
'emacs-lisp-mode
))
496 ;; id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
497 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 }
498 (defvar mm-pkcs7-signed-magic
499 (mm-string-as-unibyte
501 (mapcar 'char-to-string
502 (list ?
\x30 ?
\x5c ?
\x28 ?
\x80 ?
\x5c ?
\x7c ?
\x81 ?
\x2e ?
\x5c
503 ?
\x7c ?
\x82 ?
\x2e ?
\x2e ?
\x5c ?
\x7c ?
\x83 ?
\x2e ?
\x2e
504 ?
\x2e ?
\x5c ?
\x29 ?
\x06 ?
\x09 ?
\x5c ?
\x2a ?
\x86 ?
\x48
505 ?
\x86 ?
\xf7 ?
\x0d ?
\x01 ?
\x07 ?
\x02)))))
507 ;; id-envelopedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
508 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 3 }
509 (defvar mm-pkcs7-enveloped-magic
510 (mm-string-as-unibyte
512 (mapcar 'char-to-string
513 (list ?
\x30 ?
\x5c ?
\x28 ?
\x80 ?
\x5c ?
\x7c ?
\x81 ?
\x2e ?
\x5c
514 ?
\x7c ?
\x82 ?
\x2e ?
\x2e ?
\x5c ?
\x7c ?
\x83 ?
\x2e ?
\x2e
515 ?
\x2e ?
\x5c ?
\x29 ?
\x06 ?
\x09 ?
\x5c ?
\x2a ?
\x86 ?
\x48
516 ?
\x86 ?
\xf7 ?
\x0d ?
\x01 ?
\x07 ?
\x03)))))
518 (defun mm-view-pkcs7-get-type (handle)
519 (mm-with-unibyte-buffer
520 (mm-insert-part handle
)
521 (cond ((looking-at mm-pkcs7-enveloped-magic
)
523 ((looking-at mm-pkcs7-signed-magic
)
526 (error "Could not identify PKCS#7 type")))))
528 (defun mm-view-pkcs7 (handle)
529 (case (mm-view-pkcs7-get-type handle
)
530 (enveloped (mm-view-pkcs7-decrypt handle
))
531 (signed (mm-view-pkcs7-verify handle
))
532 (otherwise (error "Unknown or unimplemented PKCS#7 type"))))
534 (defun mm-view-pkcs7-verify (handle)
535 ;; A bogus implementation of PKCS#7. FIXME::
536 (mm-insert-part handle
)
537 (goto-char (point-min))
538 (if (search-forward "Content-Type: " nil t
)
539 (delete-region (point-min) (match-beginning 0)))
540 (goto-char (point-max))
541 (if (re-search-backward "--\r?\n?" nil t
)
542 (delete-region (match-end 0) (point-max)))
543 (goto-char (point-min))
544 (while (search-forward "\r\n" nil t
)
545 (replace-match "\n"))
546 (message "Verify signed PKCS#7 message is unimplemented.")
550 (autoload 'gnus-completing-read-maybe-default
"gnus-util" nil nil
'macro
)
552 (defun mm-view-pkcs7-decrypt (handle)
553 (insert-buffer-substring (mm-handle-buffer handle
))
554 (goto-char (point-min))
555 (insert "MIME-Version: 1.0\n")
556 (mm-insert-headers "application/pkcs7-mime" "base64" "smime.p7m")
557 (smime-decrypt-region
558 (point-min) (point-max)
559 (if (= (length smime-keys
) 1)
561 (smime-get-key-by-email
562 (gnus-completing-read-maybe-default
563 (concat "Decipher using which key? "
564 (if smime-keys
(concat "(default " (caar smime-keys
) ") ")
566 smime-keys nil nil nil nil
(car-safe (car-safe smime-keys
))))))
567 (goto-char (point-min))
568 (while (search-forward "\r\n" nil t
)
569 (replace-match "\n"))
570 (goto-char (point-min)))
574 ;;; arch-tag: b60e749a-d05c-47f2-bccd-bdaa59327cb2
575 ;;; mm-view.el ends here