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 (dolist (elem handle
)
204 (if (equal url
(mm-handle-id elem
))
206 (mm-insert-part elem
)
207 (throw 'found-handle
(mm-handle-media-type elem
))))
208 (if (equal "multipart" (mm-handle-media-supertype elem
))
209 (mm-w3m-cid-retrieve-1 url elem
)))))
211 (defun mm-w3m-cid-retrieve (url &rest args
)
212 "Insert a content pointed by URL if it has the cid: scheme."
213 (when (string-match "\\`cid:" url
)
215 (mm-w3m-cid-retrieve-1 (concat "<" (substring url
(match-end 0)) ">")
216 (with-current-buffer w3m-current-buffer
217 gnus-article-mime-handles
)))))
219 (defun mm-inline-text-html-render-with-w3m (handle)
220 "Render a text/html part using emacs-w3m."
222 (let ((text (mm-get-part handle
))
224 (charset (mail-content-type-get (mm-handle-type handle
) 'charset
)))
226 (insert (if charset
(mm-decode-string text charset
) text
))
228 (narrow-to-region b
(point))
230 (goto-char (point-min))
231 (when (setq charset
(w3m-detect-meta-charset))
232 (delete-region (point-min) (point-max))
233 (insert (mm-decode-string text charset
))))
234 (let ((w3m-safe-url-regexp mm-w3m-safe-url-regexp
)
236 (w3m-region (point-min) (point-max) nil charset
))
237 (when (and mm-inline-text-html-with-w3m-keymap
238 (boundp 'w3m-minor-mode-map
)
241 (point-min) (point-max)
242 (list 'keymap w3m-minor-mode-map
243 ;; Put the mark meaning this part was rendered by emacs-w3m.
244 'mm-inline-text-html-with-w3m t
))))
245 (mm-handle-set-undisplayer
248 (let (buffer-read-only)
249 (if (functionp 'remove-specifier
)
250 (mapcar (lambda (prop)
252 (face-property 'default prop
)
254 '(background background-pixmap foreground
)))
255 (delete-region ,(point-min-marker)
256 ,(point-max-marker))))))))
258 (defun mm-links-remove-leading-blank ()
259 ;; Delete the annoying three spaces preceding each line of links
261 (goto-char (point-min))
262 (while (re-search-forward "^ " nil t
)
263 (delete-region (match-beginning 0) (match-end 0))))
265 (defun mm-inline-wash-with-file (post-func cmd
&rest args
)
266 (let ((file (mm-make-temp-file
267 (expand-file-name "mm" mm-tmp-directory
))))
268 (let ((coding-system-for-write 'binary
))
269 (write-region (point-min) (point-max) file nil
'silent
))
270 (delete-region (point-min) (point-max))
272 (apply 'call-process cmd nil t nil
(mapcar 'eval args
))
274 (and post-func
(funcall post-func
))))
276 (defun mm-inline-wash-with-stdin (post-func cmd
&rest args
)
277 (let ((coding-system-for-write 'binary
))
278 (apply 'call-process-region
(point-min) (point-max)
280 (and post-func
(funcall post-func
)))
282 (defun mm-inline-render-with-file (handle post-func cmd
&rest args
)
283 (let ((source (mm-get-part handle
)))
286 (mm-with-unibyte-buffer
288 (apply 'mm-inline-wash-with-file post-func cmd args
)
291 (defun mm-inline-render-with-stdin (handle post-func cmd
&rest args
)
292 (let ((source (mm-get-part handle
)))
295 (mm-with-unibyte-buffer
297 (apply 'mm-inline-wash-with-stdin post-func cmd args
)
300 (defun mm-inline-render-with-function (handle func
&rest args
)
301 (let ((source (mm-get-part handle
))
302 (charset (mail-content-type-get (mm-handle-type handle
) 'charset
)))
305 (mm-with-multibyte-buffer
307 (mm-decode-string source charset
)
312 (defun mm-inline-text-html (handle)
313 (let* ((func (or mm-inline-text-html-renderer mm-text-html-renderer
))
314 (entry (assq func mm-text-html-renderer-alist
))
317 (setq func
(cdr entry
)))
320 (funcall func handle
))
322 (apply (car func
) handle
(cdr func
))))))
324 (defun mm-inline-text-vcard (handle)
325 (let (buffer-read-only)
330 (if (fboundp 'vcard-pretty-print
)
331 (vcard-pretty-print (mm-get-part handle
))
333 (vcard-parse-string (mm-get-part handle
)
334 'vcard-standard-filter
))))))))
336 (defun mm-inline-text (handle)
338 (type (mm-handle-media-subtype handle
))
339 (charset (mail-content-type-get
340 (mm-handle-type handle
) 'charset
))
342 (if (or (eq charset
'gnus-decoded
)
343 ;; This is probably not entirely correct, but
344 ;; makes rfc822 parts with embedded multiparts work.
345 (eq mail-parse-charset
'gnus-decoded
))
347 (narrow-to-region (point) (point))
348 (mm-insert-part handle
)
349 (goto-char (point-max)))
350 (insert (mm-decode-string (mm-get-part handle
) charset
)))
351 (when (and (equal type
"plain")
352 (equal (cdr (assoc 'format
(mm-handle-type handle
)))
355 (narrow-to-region b
(point))
358 (goto-char (point-max))))
360 (narrow-to-region b
(point))
361 (set-text-properties (point-min) (point-max) nil
)
362 (when (or (equal type
"enriched")
363 (equal type
"richtext"))
365 (enriched-decode (point-min) (point-max))))
366 (mm-handle-set-undisplayer
369 (let (buffer-read-only)
370 (delete-region ,(point-min-marker)
371 ,(point-max-marker))))))))
373 (defun mm-insert-inline (handle text
)
374 "Insert TEXT inline from HANDLE."
377 (mm-handle-set-undisplayer
380 (let (buffer-read-only)
381 (delete-region ,(set-marker (make-marker) b
)
382 ,(set-marker (make-marker) (point))))))))
384 (defun mm-inline-audio (handle)
385 (message "Not implemented"))
387 (defun mm-view-sound-file ()
388 (message "Not implemented"))
390 (defun mm-w3-prepare-buffer ()
392 (let ((url-standalone-mode t
)
393 (url-gateway-unplugged t
)
394 (w3-honor-stylesheets nil
))
395 (w3-prepare-buffer)))
397 (defun mm-view-message ()
398 (mm-enable-multibyte)
400 (let (gnus-article-mime-handles)
401 ;; Double decode problem may happen. See mm-inline-message.
402 (run-hooks 'gnus-article-decode-hook
)
403 (gnus-article-prepare-display)
404 (setq handles gnus-article-mime-handles
))
406 (setq gnus-article-mime-handles
407 (mm-merge-handles gnus-article-mime-handles handles
))))
409 (goto-char (point-min)))
411 (defun mm-inline-message (handle)
414 (charset (mail-content-type-get
415 (mm-handle-type handle
) 'charset
))
416 gnus-displaying-mime handles
)
419 (setq charset
(intern (downcase charset
)))
420 (when (eq charset
'us-ascii
)
424 (narrow-to-region b b
)
425 (mm-insert-part handle
)
426 (let (gnus-article-mime-handles
427 ;; disable prepare hook
428 gnus-article-prepare-hook
429 (gnus-newsgroup-charset
430 (or charset gnus-newsgroup-charset
)))
431 (let ((gnus-original-article-buffer (mm-handle-buffer handle
)))
432 (run-hooks 'gnus-article-decode-hook
))
433 (gnus-article-prepare-display)
434 (setq handles gnus-article-mime-handles
))
435 (goto-char (point-min))
438 (goto-char (point-max))
441 (insert "----------\n\n")
443 (setq gnus-article-mime-handles
444 (mm-merge-handles gnus-article-mime-handles handles
)))
445 (mm-handle-set-undisplayer
448 (let (buffer-read-only)
449 (if (fboundp 'remove-specifier
)
450 ;; This is only valid on XEmacs.
451 (mapcar (lambda (prop)
453 (face-property 'default prop
) (current-buffer)))
454 '(background background-pixmap foreground
)))
455 (delete-region ,(point-min-marker) ,(point-max-marker)))))))))
457 (defun mm-display-inline-fontify (handle mode
)
459 ;; XEmacs @#$@ version of font-lock refuses to fully turn itself
460 ;; on for buffers whose name begins with " ". That's why we use
461 ;; save-current-buffer/get-buffer-create rather than
464 (set-buffer (generate-new-buffer "*fontification*"))
467 (buffer-disable-undo)
468 (mm-insert-part handle
)
470 ;; Inhibit font-lock this time (*-mode-hook might run
471 ;; `turn-on-font-lock') so that jit-lock may not turn off
472 ;; font-lock immediately after this.
473 (let ((font-lock-mode t
))
475 (let ((font-lock-verbose nil
))
476 ;; I find font-lock a bit too verbose.
477 (font-lock-fontify-buffer))
478 ;; By default, XEmacs font-lock uses non-duplicable text
479 ;; properties. This code forces all the text properties
480 ;; to be copied along with the text.
481 (when (fboundp 'extent-list
)
482 (map-extents (lambda (ext ignored
)
483 (set-extent-property ext
'duplicable t
)
485 nil nil nil nil nil
'text-prop
))
486 (setq text
(buffer-string)))
487 (kill-buffer (current-buffer))))
488 (mm-insert-inline handle text
)))
490 ;; Shouldn't these functions check whether the user even wants to use
491 ;; font-lock? At least under XEmacs, this fontification is pretty
492 ;; much unconditional. Also, it would be nice to change for the size
493 ;; of the fontified region.
495 (defun mm-display-patch-inline (handle)
496 (mm-display-inline-fontify handle
'diff-mode
))
498 (defun mm-display-elisp-inline (handle)
499 (mm-display-inline-fontify handle
'emacs-lisp-mode
))
501 ;; id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
502 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 }
503 (defvar mm-pkcs7-signed-magic
504 (mm-string-as-unibyte
506 (mapcar 'char-to-string
507 (list ?
\x30 ?
\x5c ?
\x28 ?
\x80 ?
\x5c ?
\x7c ?
\x81 ?
\x2e ?
\x5c
508 ?
\x7c ?
\x82 ?
\x2e ?
\x2e ?
\x5c ?
\x7c ?
\x83 ?
\x2e ?
\x2e
509 ?
\x2e ?
\x5c ?
\x29 ?
\x06 ?
\x09 ?
\x5c ?
\x2a ?
\x86 ?
\x48
510 ?
\x86 ?
\xf7 ?
\x0d ?
\x01 ?
\x07 ?
\x02)))))
512 ;; id-envelopedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
513 ;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 3 }
514 (defvar mm-pkcs7-enveloped-magic
515 (mm-string-as-unibyte
517 (mapcar 'char-to-string
518 (list ?
\x30 ?
\x5c ?
\x28 ?
\x80 ?
\x5c ?
\x7c ?
\x81 ?
\x2e ?
\x5c
519 ?
\x7c ?
\x82 ?
\x2e ?
\x2e ?
\x5c ?
\x7c ?
\x83 ?
\x2e ?
\x2e
520 ?
\x2e ?
\x5c ?
\x29 ?
\x06 ?
\x09 ?
\x5c ?
\x2a ?
\x86 ?
\x48
521 ?
\x86 ?
\xf7 ?
\x0d ?
\x01 ?
\x07 ?
\x03)))))
523 (defun mm-view-pkcs7-get-type (handle)
524 (mm-with-unibyte-buffer
525 (mm-insert-part handle
)
526 (cond ((looking-at mm-pkcs7-enveloped-magic
)
528 ((looking-at mm-pkcs7-signed-magic
)
531 (error "Could not identify PKCS#7 type")))))
533 (defun mm-view-pkcs7 (handle)
534 (case (mm-view-pkcs7-get-type handle
)
535 (enveloped (mm-view-pkcs7-decrypt handle
))
536 (signed (mm-view-pkcs7-verify handle
))
537 (otherwise (error "Unknown or unimplemented PKCS#7 type"))))
539 (defun mm-view-pkcs7-verify (handle)
540 ;; A bogus implementation of PKCS#7. FIXME::
541 (mm-insert-part handle
)
542 (goto-char (point-min))
543 (if (search-forward "Content-Type: " nil t
)
544 (delete-region (point-min) (match-beginning 0)))
545 (goto-char (point-max))
546 (if (re-search-backward "--\r?\n?" nil t
)
547 (delete-region (match-end 0) (point-max)))
548 (goto-char (point-min))
549 (while (search-forward "\r\n" nil t
)
550 (replace-match "\n"))
551 (message "Verify signed PKCS#7 message is unimplemented.")
555 (autoload 'gnus-completing-read-maybe-default
"gnus-util" nil nil
'macro
)
557 (defun mm-view-pkcs7-decrypt (handle)
558 (insert-buffer-substring (mm-handle-buffer handle
))
559 (goto-char (point-min))
560 (insert "MIME-Version: 1.0\n")
561 (mm-insert-headers "application/pkcs7-mime" "base64" "smime.p7m")
562 (smime-decrypt-region
563 (point-min) (point-max)
564 (if (= (length smime-keys
) 1)
566 (smime-get-key-by-email
567 (gnus-completing-read-maybe-default
568 (concat "Decipher using which key? "
569 (if smime-keys
(concat "(default " (caar smime-keys
) ") ")
571 smime-keys nil nil nil nil
(car-safe (car-safe smime-keys
))))))
572 (goto-char (point-min))
573 (while (search-forward "\r\n" nil t
)
574 (replace-match "\n"))
575 (goto-char (point-min)))
579 ;;; arch-tag: b60e749a-d05c-47f2-bccd-bdaa59327cb2
580 ;;; mm-view.el ends here