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23f87bed | 1 | ;;; mm-decode.el --- Functions for decoding MIME things |
ddff82cf | 2 | ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
23f87bed | 3 | ;; Free Software Foundation, Inc. |
c113de23 GM |
4 | |
5 | ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org> | |
6 | ;; MORIOKA Tomohiko <morioka@jaist.ac.jp> | |
7 | ;; This file is part of GNU Emacs. | |
8 | ||
9 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
10 | ;; it under the terms of the GNU General Public License as published by | |
11 | ;; the Free Software Foundation; either version 2, or (at your option) | |
12 | ;; any later version. | |
13 | ||
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
20 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
21 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | ;; Boston, MA 02111-1307, USA. | |
23 | ||
24 | ;;; Commentary: | |
25 | ||
26 | ;;; Code: | |
27 | ||
28 | (require 'mail-parse) | |
29 | (require 'mailcap) | |
30 | (require 'mm-bodies) | |
23f87bed MB |
31 | (eval-when-compile (require 'cl) |
32 | (require 'term)) | |
c113de23 GM |
33 | |
34 | (eval-and-compile | |
23f87bed | 35 | (autoload 'executable-find "executable") |
0e43de59 | 36 | (autoload 'mm-inline-partial "mm-partial") |
23f87bed | 37 | (autoload 'mm-inline-external-body "mm-extern") |
0e43de59 | 38 | (autoload 'mm-insert-inline "mm-view")) |
c113de23 | 39 | |
23f87bed MB |
40 | (add-hook 'gnus-exit-gnus-hook 'mm-destroy-postponed-undisplay-list) |
41 | ||
c113de23 GM |
42 | (defgroup mime-display () |
43 | "Display of MIME in mail and news articles." | |
23f87bed | 44 | :link '(custom-manual "(emacs-mime)Display Customization") |
c113de23 GM |
45 | :version "21.1" |
46 | :group 'mail | |
47 | :group 'news | |
48 | :group 'multimedia) | |
49 | ||
23f87bed MB |
50 | (defgroup mime-security () |
51 | "MIME security in mail and news articles." | |
52 | :link '(custom-manual "(emacs-mime)Display Customization") | |
53 | :group 'mail | |
54 | :group 'news | |
55 | :group 'multimedia) | |
56 | ||
c113de23 GM |
57 | ;;; Convenience macros. |
58 | ||
59 | (defmacro mm-handle-buffer (handle) | |
60 | `(nth 0 ,handle)) | |
61 | (defmacro mm-handle-type (handle) | |
62 | `(nth 1 ,handle)) | |
63 | (defsubst mm-handle-media-type (handle) | |
64 | (if (stringp (car handle)) | |
65 | (car handle) | |
66 | (car (mm-handle-type handle)))) | |
67 | (defsubst mm-handle-media-supertype (handle) | |
68 | (car (split-string (mm-handle-media-type handle) "/"))) | |
69 | (defsubst mm-handle-media-subtype (handle) | |
70 | (cadr (split-string (mm-handle-media-type handle) "/"))) | |
71 | (defmacro mm-handle-encoding (handle) | |
72 | `(nth 2 ,handle)) | |
73 | (defmacro mm-handle-undisplayer (handle) | |
74 | `(nth 3 ,handle)) | |
75 | (defmacro mm-handle-set-undisplayer (handle function) | |
76 | `(setcar (nthcdr 3 ,handle) ,function)) | |
77 | (defmacro mm-handle-disposition (handle) | |
78 | `(nth 4 ,handle)) | |
79 | (defmacro mm-handle-description (handle) | |
80 | `(nth 5 ,handle)) | |
81 | (defmacro mm-handle-cache (handle) | |
82 | `(nth 6 ,handle)) | |
83 | (defmacro mm-handle-set-cache (handle contents) | |
84 | `(setcar (nthcdr 6 ,handle) ,contents)) | |
85 | (defmacro mm-handle-id (handle) | |
86 | `(nth 7 ,handle)) | |
23f87bed MB |
87 | (defmacro mm-handle-multipart-original-buffer (handle) |
88 | `(get-text-property 0 'buffer (car ,handle))) | |
89 | (defmacro mm-handle-multipart-from (handle) | |
90 | `(get-text-property 0 'from (car ,handle))) | |
91 | (defmacro mm-handle-multipart-ctl-parameter (handle parameter) | |
92 | `(get-text-property 0 ,parameter (car ,handle))) | |
93 | ||
c113de23 GM |
94 | (defmacro mm-make-handle (&optional buffer type encoding undisplayer |
95 | disposition description cache | |
96 | id) | |
97 | `(list ,buffer ,type ,encoding ,undisplayer | |
98 | ,disposition ,description ,cache ,id)) | |
99 | ||
23f87bed MB |
100 | (defcustom mm-text-html-renderer |
101 | (cond ((locate-library "w3") 'w3) | |
102 | ((executable-find "w3m") (if (locate-library "w3m") | |
103 | 'w3m | |
104 | 'w3m-standalone)) | |
105 | ((executable-find "links") 'links) | |
106 | ((executable-find "lynx") 'lynx) | |
107 | (t 'html2text)) | |
108 | "Render of HTML contents. | |
109 | It is one of defined renderer types, or a rendering function. | |
110 | The defined renderer types are: | |
111 | `w3' : use Emacs/W3; | |
112 | `w3m' : use emacs-w3m; | |
113 | `w3m-standalone': use w3m; | |
114 | `links': use links; | |
115 | `lynx' : use lynx; | |
116 | `html2text' : use html2text; | |
117 | nil : use external viewer." | |
bf247b6e | 118 | :version "22.1" |
23f87bed MB |
119 | :type '(choice (const w3) |
120 | (const w3m) | |
121 | (const w3m-standalone) | |
122 | (const links) | |
123 | (const lynx) | |
124 | (const html2text) | |
125 | (const nil) | |
126 | (function)) | |
23f87bed MB |
127 | :group 'mime-display) |
128 | ||
129 | (defvar mm-inline-text-html-renderer nil | |
130 | "Function used for rendering inline HTML contents. | |
131 | It is suggested to customize `mm-text-html-renderer' instead.") | |
132 | ||
133 | (defcustom mm-inline-text-html-with-images nil | |
134 | "If non-nil, Gnus will allow retrieving images in HTML contents with | |
135 | the <img> tags. It has no effect on Emacs/w3. See also the | |
136 | documentation for the `mm-w3m-safe-url-regexp' variable." | |
bf247b6e | 137 | :version "22.1" |
23f87bed MB |
138 | :type 'boolean |
139 | :group 'mime-display) | |
140 | ||
141 | (defcustom mm-w3m-safe-url-regexp "\\`cid:" | |
142 | "Regexp matching URLs which are considered to be safe. | |
143 | Some HTML mails might contain a nasty trick used by spammers, using | |
144 | the <img> tag which is far more evil than the [Click Here!] button. | |
145 | It is most likely intended to check whether the ominous spam mail has | |
146 | reached your eyes or not, in which case the spammer knows for sure | |
147 | that your email address is valid. It is done by embedding an | |
148 | identifier string into a URL that you might automatically retrieve | |
149 | when displaying the image. The default value is \"\\\\`cid:\" which only | |
150 | matches parts embedded to the Multipart/Related type MIME contents and | |
151 | Gnus will never connect to the spammer's site arbitrarily. You may | |
152 | set this variable to nil if you consider all urls to be safe." | |
bf247b6e | 153 | :version "22.1" |
23f87bed MB |
154 | :type '(choice (regexp :tag "Regexp") |
155 | (const :tag "All URLs are safe" nil)) | |
156 | :group 'mime-display) | |
157 | ||
158 | (defcustom mm-inline-text-html-with-w3m-keymap t | |
159 | "If non-nil, use emacs-w3m command keys in the article buffer." | |
bf247b6e | 160 | :version "22.1" |
23f87bed MB |
161 | :type 'boolean |
162 | :group 'mime-display) | |
163 | ||
164 | (defcustom mm-enable-external t | |
165 | "Indicate whether external MIME handlers should be used. | |
166 | ||
167 | If t, all defined external MIME handlers are used. If nil, files are saved by | |
168 | `mailcap-save-binary-file'. If it is the symbol `ask', you are prompted | |
169 | before the external MIME handler is invoked." | |
bf247b6e | 170 | :version "22.1" |
23f87bed MB |
171 | :type '(choice (const :tag "Always" t) |
172 | (const :tag "Never" nil) | |
173 | (const :tag "Ask" ask)) | |
174 | :group 'mime-display) | |
175 | ||
c113de23 | 176 | (defcustom mm-inline-media-tests |
23f87bed | 177 | '(("image/p?jpeg" |
c113de23 GM |
178 | mm-inline-image |
179 | (lambda (handle) | |
180 | (mm-valid-and-fit-image-p 'jpeg handle))) | |
181 | ("image/png" | |
182 | mm-inline-image | |
183 | (lambda (handle) | |
184 | (mm-valid-and-fit-image-p 'png handle))) | |
185 | ("image/gif" | |
186 | mm-inline-image | |
187 | (lambda (handle) | |
188 | (mm-valid-and-fit-image-p 'gif handle))) | |
189 | ("image/tiff" | |
190 | mm-inline-image | |
191 | (lambda (handle) | |
192 | (mm-valid-and-fit-image-p 'tiff handle)) ) | |
193 | ("image/xbm" | |
194 | mm-inline-image | |
195 | (lambda (handle) | |
196 | (mm-valid-and-fit-image-p 'xbm handle))) | |
197 | ("image/x-xbitmap" | |
198 | mm-inline-image | |
199 | (lambda (handle) | |
200 | (mm-valid-and-fit-image-p 'xbm handle))) | |
201 | ("image/xpm" | |
202 | mm-inline-image | |
203 | (lambda (handle) | |
204 | (mm-valid-and-fit-image-p 'xpm handle))) | |
23f87bed | 205 | ("image/x-xpixmap" |
c113de23 GM |
206 | mm-inline-image |
207 | (lambda (handle) | |
208 | (mm-valid-and-fit-image-p 'xpm handle))) | |
209 | ("image/bmp" | |
210 | mm-inline-image | |
211 | (lambda (handle) | |
212 | (mm-valid-and-fit-image-p 'bmp handle))) | |
5bb548d2 DL |
213 | ("image/x-portable-bitmap" |
214 | mm-inline-image | |
215 | (lambda (handle) | |
216 | (mm-valid-and-fit-image-p 'pbm handle))) | |
c113de23 GM |
217 | ("text/plain" mm-inline-text identity) |
218 | ("text/enriched" mm-inline-text identity) | |
219 | ("text/richtext" mm-inline-text identity) | |
220 | ("text/x-patch" mm-display-patch-inline | |
221 | (lambda (handle) | |
222 | (locate-library "diff-mode"))) | |
ce9401f3 | 223 | ("application/emacs-lisp" mm-display-elisp-inline identity) |
23f87bed | 224 | ("application/x-emacs-lisp" mm-display-elisp-inline identity) |
c113de23 | 225 | ("text/html" |
23f87bed | 226 | mm-inline-text-html |
c113de23 | 227 | (lambda (handle) |
23f87bed MB |
228 | (or mm-inline-text-html-renderer |
229 | mm-text-html-renderer))) | |
c113de23 | 230 | ("text/x-vcard" |
23f87bed | 231 | mm-inline-text-vcard |
c113de23 GM |
232 | (lambda (handle) |
233 | (or (featurep 'vcard) | |
234 | (locate-library "vcard")))) | |
235 | ("message/delivery-status" mm-inline-text identity) | |
236 | ("message/rfc822" mm-inline-message identity) | |
237 | ("message/partial" mm-inline-partial identity) | |
23f87bed | 238 | ("message/external-body" mm-inline-external-body identity) |
c113de23 GM |
239 | ("text/.*" mm-inline-text identity) |
240 | ("audio/wav" mm-inline-audio | |
241 | (lambda (handle) | |
242 | (and (or (featurep 'nas-sound) (featurep 'native-sound)) | |
243 | (device-sound-enabled-p)))) | |
244 | ("audio/au" | |
245 | mm-inline-audio | |
246 | (lambda (handle) | |
247 | (and (or (featurep 'nas-sound) (featurep 'native-sound)) | |
248 | (device-sound-enabled-p)))) | |
249 | ("application/pgp-signature" ignore identity) | |
23f87bed MB |
250 | ("application/x-pkcs7-signature" ignore identity) |
251 | ("application/pkcs7-signature" ignore identity) | |
252 | ("application/x-pkcs7-mime" ignore identity) | |
253 | ("application/pkcs7-mime" ignore identity) | |
c113de23 GM |
254 | ("multipart/alternative" ignore identity) |
255 | ("multipart/mixed" ignore identity) | |
23f87bed MB |
256 | ("multipart/related" ignore identity) |
257 | ;; Disable audio and image | |
258 | ("audio/.*" ignore ignore) | |
259 | ("image/.*" ignore ignore) | |
260 | ;; Default to displaying as text | |
261 | (".*" mm-inline-text mm-readable-p)) | |
c113de23 | 262 | "Alist of media types/tests saying whether types can be displayed inline." |
23f87bed | 263 | :type '(repeat (list (regexp :tag "MIME type") |
c113de23 GM |
264 | (function :tag "Display function") |
265 | (function :tag "Display test"))) | |
266 | :group 'mime-display) | |
267 | ||
268 | (defcustom mm-inlined-types | |
269 | '("image/.*" "text/.*" "message/delivery-status" "message/rfc822" | |
23f87bed MB |
270 | "message/partial" "message/external-body" "application/emacs-lisp" |
271 | "application/x-emacs-lisp" | |
272 | "application/pgp-signature" "application/x-pkcs7-signature" | |
273 | "application/pkcs7-signature" "application/x-pkcs7-mime" | |
274 | "application/pkcs7-mime") | |
275 | "List of media types that are to be displayed inline. | |
276 | See also `mm-inline-media-tests', which says how to display a media | |
277 | type inline." | |
278 | :type '(repeat string) | |
279 | :group 'mime-display) | |
280 | ||
281 | (defcustom mm-keep-viewer-alive-types | |
282 | '("application/postscript" "application/msword" "application/vnd.ms-excel" | |
283 | "application/pdf" "application/x-dvi") | |
284 | "List of media types for which the external viewer will not be killed | |
285 | when selecting a different article." | |
bf247b6e | 286 | :version "22.1" |
c113de23 GM |
287 | :type '(repeat string) |
288 | :group 'mime-display) | |
a1506d29 | 289 | |
c113de23 GM |
290 | (defcustom mm-automatic-display |
291 | '("text/plain" "text/enriched" "text/richtext" "text/html" | |
292 | "text/x-vcard" "image/.*" "message/delivery-status" "multipart/.*" | |
5bb548d2 | 293 | "message/rfc822" "text/x-patch" "application/pgp-signature" |
23f87bed MB |
294 | "application/emacs-lisp" "application/x-emacs-lisp" |
295 | "application/x-pkcs7-signature" | |
296 | "application/pkcs7-signature" "application/x-pkcs7-mime" | |
297 | "application/pkcs7-mime") | |
c113de23 GM |
298 | "A list of MIME types to be displayed automatically." |
299 | :type '(repeat string) | |
300 | :group 'mime-display) | |
301 | ||
23f87bed MB |
302 | (defcustom mm-attachment-override-types '("text/x-vcard" |
303 | "application/pkcs7-mime" | |
304 | "application/x-pkcs7-mime" | |
305 | "application/pkcs7-signature" | |
306 | "application/x-pkcs7-signature") | |
c113de23 GM |
307 | "Types to have \"attachment\" ignored if they can be displayed inline." |
308 | :type '(repeat string) | |
309 | :group 'mime-display) | |
310 | ||
311 | (defcustom mm-inline-override-types nil | |
312 | "Types to be treated as attachments even if they can be displayed inline." | |
313 | :type '(repeat string) | |
314 | :group 'mime-display) | |
315 | ||
316 | (defcustom mm-automatic-external-display nil | |
317 | "List of MIME type regexps that will be displayed externally automatically." | |
318 | :type '(repeat string) | |
319 | :group 'mime-display) | |
320 | ||
321 | (defcustom mm-discouraged-alternatives nil | |
322 | "List of MIME types that are discouraged when viewing multipart/alternative. | |
323 | Viewing agents are supposed to view the last possible part of a message, | |
324 | as that is supposed to be the richest. However, users may prefer other | |
325 | types instead, and this list says what types are most unwanted. If, | |
326 | for instance, text/html parts are very unwanted, and text/richtext are | |
327 | somewhat unwanted, then the value of this variable should be set | |
328 | to: | |
329 | ||
330 | (\"text/html\" \"text/richtext\")" | |
331 | :type '(repeat string) | |
332 | :group 'mime-display) | |
333 | ||
23f87bed MB |
334 | (defcustom mm-tmp-directory |
335 | (if (fboundp 'temp-directory) | |
336 | (temp-directory) | |
337 | (if (boundp 'temporary-file-directory) | |
338 | temporary-file-directory | |
339 | "/tmp/")) | |
340 | "Where mm will store its temporary files." | |
341 | :type 'directory | |
342 | :group 'mime-display) | |
c113de23 GM |
343 | |
344 | (defcustom mm-inline-large-images nil | |
345 | "If non-nil, then all images fit in the buffer." | |
346 | :type 'boolean | |
347 | :group 'mime-display) | |
348 | ||
23f87bed MB |
349 | (defvar mm-file-name-rewrite-functions |
350 | '(mm-file-name-delete-control mm-file-name-delete-gotchas) | |
351 | "*List of functions used for rewriting file names of MIME parts. | |
352 | Each function takes a file name as input and returns a file name. | |
353 | ||
354 | Ready-made functions include | |
355 | `mm-file-name-delete-control' | |
356 | `mm-file-name-delete-gotchas' | |
357 | `mm-file-name-delete-whitespace', | |
358 | `mm-file-name-trim-whitespace', | |
359 | `mm-file-name-collapse-whitespace', | |
360 | `mm-file-name-replace-whitespace', | |
361 | `capitalize', `downcase', `upcase', and | |
362 | `upcase-initials'.") | |
363 | ||
364 | (defvar mm-path-name-rewrite-functions nil | |
365 | "*List of functions for rewriting the full file names of MIME parts. | |
366 | This is used when viewing parts externally, and is meant for | |
367 | transforming the absolute name so that non-compliant programs can find | |
368 | the file where it's saved. | |
369 | ||
370 | Each function takes a file name as input and returns a file name.") | |
371 | ||
372 | (defvar mm-file-name-replace-whitespace nil | |
373 | "String used for replacing whitespace characters; default is `\"_\"'.") | |
374 | ||
375 | (defcustom mm-default-directory nil | |
376 | "The default directory where mm will save files. | |
377 | If not set, `default-directory' will be used." | |
378 | :type '(choice directory (const :tag "Default" nil)) | |
379 | :group 'mime-display) | |
380 | ||
381 | (defcustom mm-attachment-file-modes 384 | |
382 | "Set the mode bits of saved attachments to this integer." | |
bf247b6e | 383 | :version "22.1" |
23f87bed MB |
384 | :type 'integer |
385 | :group 'mime-display) | |
386 | ||
387 | (defcustom mm-external-terminal-program "xterm" | |
388 | "The program to start an external terminal." | |
bf247b6e | 389 | :version "22.1" |
23f87bed MB |
390 | :type 'string |
391 | :group 'mime-display) | |
392 | ||
c113de23 GM |
393 | ;;; Internal variables. |
394 | ||
c113de23 GM |
395 | (defvar mm-last-shell-command "") |
396 | (defvar mm-content-id-alist nil) | |
23f87bed | 397 | (defvar mm-postponed-undisplay-list nil) |
c113de23 GM |
398 | |
399 | ;; According to RFC2046, in particular, in a digest, the default | |
400 | ;; Content-Type value for a body part is changed from "text/plain" to | |
401 | ;; "message/rfc822". | |
402 | (defvar mm-dissect-default-type "text/plain") | |
403 | ||
23f87bed MB |
404 | (autoload 'mml2015-verify "mml2015") |
405 | (autoload 'mml2015-verify-test "mml2015") | |
406 | (autoload 'mml-smime-verify "mml-smime") | |
407 | (autoload 'mml-smime-verify-test "mml-smime") | |
408 | ||
409 | (defvar mm-verify-function-alist | |
410 | '(("application/pgp-signature" mml2015-verify "PGP" mml2015-verify-test) | |
411 | ("application/x-gnus-pgp-signature" mm-uu-pgp-signed-extract-1 "PGP" | |
412 | mm-uu-pgp-signed-test) | |
413 | ("application/pkcs7-signature" mml-smime-verify "S/MIME" | |
414 | mml-smime-verify-test) | |
415 | ("application/x-pkcs7-signature" mml-smime-verify "S/MIME" | |
416 | mml-smime-verify-test))) | |
417 | ||
418 | (defcustom mm-verify-option 'never | |
419 | "Option of verifying signed parts. | |
420 | `never', not verify; `always', always verify; | |
421 | `known', only verify known protocols. Otherwise, ask user." | |
bf247b6e | 422 | :version "22.1" |
23f87bed MB |
423 | :type '(choice (item always) |
424 | (item never) | |
425 | (item :tag "only known protocols" known) | |
426 | (item :tag "ask" nil)) | |
427 | :group 'mime-security) | |
428 | ||
429 | (autoload 'mml2015-decrypt "mml2015") | |
430 | (autoload 'mml2015-decrypt-test "mml2015") | |
431 | ||
432 | (defvar mm-decrypt-function-alist | |
433 | '(("application/pgp-encrypted" mml2015-decrypt "PGP" mml2015-decrypt-test) | |
434 | ("application/x-gnus-pgp-encrypted" mm-uu-pgp-encrypted-extract-1 "PGP" | |
435 | mm-uu-pgp-encrypted-test))) | |
436 | ||
437 | (defcustom mm-decrypt-option nil | |
438 | "Option of decrypting encrypted parts. | |
439 | `never', not decrypt; `always', always decrypt; | |
440 | `known', only decrypt known protocols. Otherwise, ask user." | |
bf247b6e | 441 | :version "22.1" |
23f87bed MB |
442 | :type '(choice (item always) |
443 | (item never) | |
444 | (item :tag "only known protocols" known) | |
445 | (item :tag "ask" nil)) | |
446 | :group 'mime-security) | |
447 | ||
448 | (defvar mm-viewer-completion-map | |
449 | (let ((map (make-sparse-keymap 'mm-viewer-completion-map))) | |
450 | (set-keymap-parent map minibuffer-local-completion-map) | |
451 | map) | |
452 | "Keymap for input viewer with completion.") | |
453 | ||
454 | ;; Should we bind other key to minibuffer-complete-word? | |
455 | (define-key mm-viewer-completion-map " " 'self-insert-command) | |
456 | ||
62a27ccf DL |
457 | (defvar mm-viewer-completion-map |
458 | (let ((map (make-sparse-keymap 'mm-viewer-completion-map))) | |
459 | (set-keymap-parent map minibuffer-local-completion-map) | |
460 | map) | |
461 | "Keymap for input viewer with completion.") | |
462 | ||
463 | ;; Should we bind other key to minibuffer-complete-word? | |
5bb548d2 | 464 | (define-key mm-viewer-completion-map " " 'self-insert-command) |
62a27ccf | 465 | |
c113de23 GM |
466 | ;;; The functions. |
467 | ||
23f87bed MB |
468 | (defun mm-alist-to-plist (alist) |
469 | "Convert association list ALIST into the equivalent property-list form. | |
470 | The plist is returned. This converts from | |
471 | ||
472 | \((a . 1) (b . 2) (c . 3)) | |
473 | ||
474 | into | |
475 | ||
476 | \(a 1 b 2 c 3) | |
477 | ||
478 | The original alist is not modified. See also `destructive-alist-to-plist'." | |
479 | (let (plist) | |
480 | (while alist | |
481 | (let ((el (car alist))) | |
482 | (setq plist (cons (cdr el) (cons (car el) plist)))) | |
483 | (setq alist (cdr alist))) | |
484 | (nreverse plist))) | |
485 | ||
486 | (defun mm-keep-viewer-alive-p (handle) | |
487 | "Say whether external viewer for HANDLE should stay alive." | |
488 | (let ((types mm-keep-viewer-alive-types) | |
489 | (type (mm-handle-media-type handle)) | |
490 | ty) | |
491 | (catch 'found | |
492 | (while (setq ty (pop types)) | |
493 | (when (string-match ty type) | |
494 | (throw 'found t)))))) | |
495 | ||
496 | (defun mm-handle-set-external-undisplayer (handle function) | |
497 | "Set the undisplayer for HANDLE to FUNCTION. | |
498 | Postpone undisplaying of viewers for types in | |
499 | `mm-keep-viewer-alive-types'." | |
500 | (if (mm-keep-viewer-alive-p handle) | |
501 | (let ((new-handle (copy-sequence handle))) | |
502 | (mm-handle-set-undisplayer new-handle function) | |
503 | (mm-handle-set-undisplayer handle nil) | |
504 | (push new-handle mm-postponed-undisplay-list)) | |
505 | (mm-handle-set-undisplayer handle function))) | |
506 | ||
507 | (defun mm-destroy-postponed-undisplay-list () | |
508 | (when mm-postponed-undisplay-list | |
509 | (message "Destroying external MIME viewers") | |
510 | (mm-destroy-parts mm-postponed-undisplay-list))) | |
511 | ||
512 | (defun mm-dissect-buffer (&optional no-strict-mime loose-mime) | |
c113de23 GM |
513 | "Dissect the current buffer and return a list of MIME handles." |
514 | (save-excursion | |
23f87bed | 515 | (let (ct ctl type subtype cte cd description id result from) |
c113de23 GM |
516 | (save-restriction |
517 | (mail-narrow-to-head) | |
518 | (when (or no-strict-mime | |
23f87bed | 519 | loose-mime |
c113de23 GM |
520 | (mail-fetch-field "mime-version")) |
521 | (setq ct (mail-fetch-field "content-type") | |
522 | ctl (ignore-errors (mail-header-parse-content-type ct)) | |
523 | cte (mail-fetch-field "content-transfer-encoding") | |
524 | cd (mail-fetch-field "content-disposition") | |
525 | description (mail-fetch-field "content-description") | |
23f87bed MB |
526 | from (mail-fetch-field "from") |
527 | id (mail-fetch-field "content-id")) | |
528 | ;; FIXME: In some circumstances, this code is running within | |
529 | ;; an unibyte macro. mail-extract-address-components | |
530 | ;; creates unibyte buffers. This `if', though not a perfect | |
531 | ;; solution, avoids most of them. | |
532 | (if from | |
533 | (setq from (cadr (mail-extract-address-components from)))))) | |
c113de23 GM |
534 | (when cte |
535 | (setq cte (mail-header-strip cte))) | |
536 | (if (or (not ctl) | |
537 | (not (string-match "/" (car ctl)))) | |
538 | (mm-dissect-singlepart | |
539 | (list mm-dissect-default-type) | |
540 | (and cte (intern (downcase (mail-header-remove-whitespace | |
541 | (mail-header-remove-comments | |
542 | cte))))) | |
543 | no-strict-mime | |
544 | (and cd (ignore-errors (mail-header-parse-content-disposition cd))) | |
545 | description) | |
546 | (setq type (split-string (car ctl) "/")) | |
547 | (setq subtype (cadr type) | |
548 | type (pop type)) | |
549 | (setq | |
550 | result | |
551 | (cond | |
552 | ((equal type "multipart") | |
553 | (let ((mm-dissect-default-type (if (equal subtype "digest") | |
554 | "message/rfc822" | |
23f87bed MB |
555 | "text/plain")) |
556 | (start (cdr (assq 'start (cdr ctl))))) | |
557 | (add-text-properties 0 (length (car ctl)) | |
558 | (mm-alist-to-plist (cdr ctl)) (car ctl)) | |
559 | ||
560 | ;; what really needs to be done here is a way to link a | |
561 | ;; MIME handle back to it's parent MIME handle (in a multilevel | |
562 | ;; MIME article). That would probably require changing | |
563 | ;; the mm-handle API so we simply store the multipart buffert | |
564 | ;; name as a text property of the "multipart/whatever" string. | |
565 | (add-text-properties 0 (length (car ctl)) | |
566 | (list 'buffer (mm-copy-to-buffer) | |
567 | 'from from | |
568 | 'start start) | |
569 | (car ctl)) | |
c113de23 GM |
570 | (cons (car ctl) (mm-dissect-multipart ctl)))) |
571 | (t | |
23f87bed MB |
572 | (mm-possibly-verify-or-decrypt |
573 | (mm-dissect-singlepart | |
574 | ctl | |
575 | (and cte (intern (downcase (mail-header-remove-whitespace | |
576 | (mail-header-remove-comments | |
577 | cte))))) | |
578 | no-strict-mime | |
579 | (and cd (ignore-errors | |
580 | (mail-header-parse-content-disposition cd))) | |
581 | description id) | |
582 | ctl)))) | |
c113de23 GM |
583 | (when id |
584 | (when (string-match " *<\\(.*\\)> *" id) | |
585 | (setq id (match-string 1 id))) | |
586 | (push (cons id result) mm-content-id-alist)) | |
587 | result)))) | |
588 | ||
589 | (defun mm-dissect-singlepart (ctl cte &optional force cdl description id) | |
590 | (when (or force | |
591 | (if (equal "text/plain" (car ctl)) | |
592 | (assoc 'format ctl) | |
593 | t)) | |
23f87bed MB |
594 | (mm-make-handle |
595 | (mm-copy-to-buffer) ctl cte nil cdl description nil id))) | |
c113de23 GM |
596 | |
597 | (defun mm-dissect-multipart (ctl) | |
598 | (goto-char (point-min)) | |
599 | (let* ((boundary (concat "\n--" (mail-content-type-get ctl 'boundary))) | |
600 | (close-delimiter (concat (regexp-quote boundary) "--[ \t]*$")) | |
601 | start parts | |
602 | (end (save-excursion | |
603 | (goto-char (point-max)) | |
604 | (if (re-search-backward close-delimiter nil t) | |
605 | (match-beginning 0) | |
606 | (point-max))))) | |
607 | (setq boundary (concat (regexp-quote boundary) "[ \t]*$")) | |
4481aa98 | 608 | (while (and (< (point) end) (re-search-forward boundary end t)) |
c113de23 GM |
609 | (goto-char (match-beginning 0)) |
610 | (when start | |
611 | (save-excursion | |
612 | (save-restriction | |
613 | (narrow-to-region start (point)) | |
614 | (setq parts (nconc (list (mm-dissect-buffer t)) parts))))) | |
23f87bed MB |
615 | (end-of-line 2) |
616 | (or (looking-at boundary) | |
617 | (forward-line 1)) | |
c113de23 | 618 | (setq start (point))) |
4481aa98 | 619 | (when (and start (< start end)) |
c113de23 GM |
620 | (save-excursion |
621 | (save-restriction | |
622 | (narrow-to-region start end) | |
623 | (setq parts (nconc (list (mm-dissect-buffer t)) parts))))) | |
23f87bed | 624 | (mm-possibly-verify-or-decrypt (nreverse parts) ctl))) |
c113de23 GM |
625 | |
626 | (defun mm-copy-to-buffer () | |
627 | "Copy the contents of the current buffer to a fresh buffer." | |
628 | (save-excursion | |
629 | (let ((obuf (current-buffer)) | |
630 | beg) | |
631 | (goto-char (point-min)) | |
632 | (search-forward-regexp "^\n" nil t) | |
633 | (setq beg (point)) | |
f4dd4ae8 MB |
634 | (set-buffer |
635 | ;; Preserve the data's unibyteness (for url-insert-file-contents). | |
636 | (let ((default-enable-multibyte-characters (mm-multibyte-p))) | |
637 | (generate-new-buffer " *mm*"))) | |
c113de23 GM |
638 | (insert-buffer-substring obuf beg) |
639 | (current-buffer)))) | |
640 | ||
23f87bed MB |
641 | (defun mm-display-parts (handle &optional no-default) |
642 | (if (stringp (car handle)) | |
643 | (mapcar 'mm-display-parts (cdr handle)) | |
644 | (if (bufferp (car handle)) | |
645 | (save-restriction | |
646 | (narrow-to-region (point) (point)) | |
647 | (mm-display-part handle) | |
648 | (goto-char (point-max))) | |
649 | (mapcar 'mm-display-parts handle)))) | |
650 | ||
c113de23 GM |
651 | (defun mm-display-part (handle &optional no-default) |
652 | "Display the MIME part represented by HANDLE. | |
653 | Returns nil if the part is removed; inline if displayed inline; | |
654 | external if displayed external." | |
655 | (save-excursion | |
656 | (mailcap-parse-mailcaps) | |
657 | (if (mm-handle-displayed-p handle) | |
658 | (mm-remove-part handle) | |
659 | (let* ((type (mm-handle-media-type handle)) | |
23f87bed MB |
660 | (method (mailcap-mime-info type)) |
661 | (filename (or (mail-content-type-get | |
662 | (mm-handle-disposition handle) 'filename) | |
663 | (mail-content-type-get | |
664 | (mm-handle-type handle) 'name) | |
665 | "<file>")) | |
666 | (external mm-enable-external)) | |
667 | (if (and (mm-inlinable-p handle) | |
668 | (mm-inlined-p handle)) | |
c113de23 GM |
669 | (progn |
670 | (forward-line 1) | |
671 | (mm-display-inline handle) | |
672 | 'inline) | |
673 | (when (or method | |
674 | (not no-default)) | |
675 | (if (and (not method) | |
676 | (equal "text" (car (split-string type)))) | |
677 | (progn | |
678 | (forward-line 1) | |
679 | (mm-insert-inline handle (mm-get-part handle)) | |
680 | 'inline) | |
23f87bed MB |
681 | (if (and method ;; If nil, we always use "save". |
682 | (stringp method) ;; 'mailcap-save-binary-file | |
683 | (or (eq mm-enable-external t) | |
684 | (and (eq mm-enable-external 'ask) | |
685 | (y-or-n-p | |
686 | (concat | |
687 | "Display part (" type | |
688 | ") using external program" | |
689 | ;; Can non-string method ever happen? | |
690 | (if (stringp method) | |
691 | (concat | |
692 | " \"" (format method filename) "\"") | |
693 | "") | |
694 | "? "))))) | |
695 | (setq external t) | |
696 | (setq external nil)) | |
697 | (if external | |
698 | (mm-display-external | |
699 | handle (or method 'mailcap-save-binary-file)) | |
700 | (mm-display-external | |
701 | handle 'mailcap-save-binary-file))))))))) | |
c113de23 GM |
702 | |
703 | (defun mm-display-external (handle method) | |
704 | "Display HANDLE using METHOD." | |
705 | (let ((outbuf (current-buffer))) | |
706 | (mm-with-unibyte-buffer | |
707 | (if (functionp method) | |
708 | (let ((cur (current-buffer))) | |
709 | (if (eq method 'mailcap-save-binary-file) | |
710 | (progn | |
6eb681a3 | 711 | (set-buffer (generate-new-buffer " *mm*")) |
c113de23 GM |
712 | (setq method nil)) |
713 | (mm-insert-part handle) | |
714 | (let ((win (get-buffer-window cur t))) | |
715 | (when win | |
716 | (select-window win))) | |
6eb681a3 | 717 | (switch-to-buffer (generate-new-buffer " *mm*"))) |
23f87bed | 718 | (buffer-disable-undo) |
c113de23 GM |
719 | (mm-set-buffer-file-coding-system mm-binary-coding-system) |
720 | (insert-buffer-substring cur) | |
721 | (goto-char (point-min)) | |
23f87bed MB |
722 | (when method |
723 | (message "Viewing with %s" method)) | |
c113de23 GM |
724 | (let ((mm (current-buffer)) |
725 | (non-viewer (assq 'non-viewer | |
726 | (mailcap-mime-info | |
727 | (mm-handle-media-type handle) t)))) | |
728 | (unwind-protect | |
729 | (if method | |
730 | (funcall method) | |
731 | (mm-save-part handle)) | |
732 | (when (and (not non-viewer) | |
733 | method) | |
734 | (mm-handle-set-undisplayer handle mm))))) | |
735 | ;; The function is a string to be executed. | |
736 | (mm-insert-part handle) | |
23f87bed | 737 | (let* ((dir (mm-make-temp-file |
3efe5554 | 738 | (expand-file-name "emm." mm-tmp-directory) 'dir)) |
23f87bed MB |
739 | (filename (or |
740 | (mail-content-type-get | |
741 | (mm-handle-disposition handle) 'filename) | |
742 | (mail-content-type-get | |
743 | (mm-handle-type handle) 'name))) | |
c113de23 GM |
744 | (mime-info (mailcap-mime-info |
745 | (mm-handle-media-type handle) t)) | |
746 | (needsterm (or (assoc "needsterm" mime-info) | |
747 | (assoc "needsterminal" mime-info))) | |
748 | (copiousoutput (assoc "copiousoutput" mime-info)) | |
749 | file buffer) | |
750 | ;; We create a private sub-directory where we store our files. | |
c113de23 GM |
751 | (set-file-modes dir 448) |
752 | (if filename | |
23f87bed MB |
753 | (setq file (expand-file-name |
754 | (gnus-map-function mm-file-name-rewrite-functions | |
755 | (file-name-nondirectory filename)) | |
756 | dir)) | |
3efe5554 | 757 | (setq file (mm-make-temp-file (expand-file-name "mm." dir)))) |
c113de23 GM |
758 | (let ((coding-system-for-write mm-binary-coding-system)) |
759 | (write-region (point-min) (point-max) file nil 'nomesg)) | |
760 | (message "Viewing with %s" method) | |
23f87bed MB |
761 | (cond |
762 | (needsterm | |
763 | (let ((command (mm-mailcap-command | |
764 | method file (mm-handle-type handle)))) | |
765 | (unwind-protect | |
766 | (if window-system | |
767 | (start-process "*display*" nil | |
768 | mm-external-terminal-program | |
769 | "-e" shell-file-name | |
770 | shell-command-switch command) | |
771 | (require 'term) | |
772 | (require 'gnus-win) | |
773 | (set-buffer | |
774 | (setq buffer | |
775 | (make-term "display" | |
776 | shell-file-name | |
777 | nil | |
778 | shell-command-switch command))) | |
779 | (term-mode) | |
780 | (term-char-mode) | |
781 | (set-process-sentinel | |
782 | (get-buffer-process buffer) | |
783 | `(lambda (process state) | |
784 | (if (eq 'exit (process-status process)) | |
785 | (gnus-configure-windows | |
786 | ',gnus-current-window-configuration)))) | |
787 | (gnus-configure-windows 'display-term)) | |
788 | (mm-handle-set-external-undisplayer handle (cons file buffer))) | |
789 | (message "Displaying %s..." command)) | |
790 | 'external) | |
791 | (copiousoutput | |
792 | (with-current-buffer outbuf | |
793 | (forward-line 1) | |
794 | (mm-insert-inline | |
795 | handle | |
796 | (unwind-protect | |
797 | (progn | |
798 | (call-process shell-file-name nil | |
799 | (setq buffer | |
800 | (generate-new-buffer " *mm*")) | |
801 | nil | |
802 | shell-command-switch | |
803 | (mm-mailcap-command | |
804 | method file (mm-handle-type handle))) | |
805 | (if (buffer-live-p buffer) | |
806 | (save-excursion | |
807 | (set-buffer buffer) | |
808 | (buffer-string)))) | |
809 | (progn | |
810 | (ignore-errors (delete-file file)) | |
811 | (ignore-errors (delete-directory | |
812 | (file-name-directory file))) | |
813 | (ignore-errors (kill-buffer buffer)))))) | |
814 | 'inline) | |
815 | (t | |
816 | (let ((command (mm-mailcap-command | |
817 | method file (mm-handle-type handle)))) | |
818 | (unwind-protect | |
819 | (start-process "*display*" | |
820 | (setq buffer | |
821 | (generate-new-buffer " *mm*")) | |
822 | shell-file-name | |
823 | shell-command-switch command) | |
824 | (mm-handle-set-external-undisplayer | |
825 | handle (cons file buffer))) | |
826 | (message "Displaying %s..." command)) | |
827 | 'external))))))) | |
a1506d29 | 828 | |
c113de23 GM |
829 | (defun mm-mailcap-command (method file type-list) |
830 | (let ((ctl (cdr type-list)) | |
831 | (beg 0) | |
832 | (uses-stdin t) | |
833 | out sub total) | |
23f87bed MB |
834 | (while (string-match "%{\\([^}]+\\)}\\|'%s'\\|\"%s\"\\|%s\\|%t\\|%%" |
835 | method beg) | |
c113de23 GM |
836 | (push (substring method beg (match-beginning 0)) out) |
837 | (setq beg (match-end 0) | |
838 | total (match-string 0 method) | |
839 | sub (match-string 1 method)) | |
840 | (cond | |
841 | ((string= total "%%") | |
842 | (push "%" out)) | |
23f87bed MB |
843 | ((or (string= total "%s") |
844 | ;; We do our own quoting. | |
845 | (string= total "'%s'") | |
846 | (string= total "\"%s\"")) | |
c113de23 | 847 | (setq uses-stdin nil) |
23f87bed MB |
848 | (push (mm-quote-arg |
849 | (gnus-map-function mm-path-name-rewrite-functions file)) out)) | |
c113de23 GM |
850 | ((string= total "%t") |
851 | (push (mm-quote-arg (car type-list)) out)) | |
852 | (t | |
853 | (push (mm-quote-arg (or (cdr (assq (intern sub) ctl)) "")) out)))) | |
854 | (push (substring method beg (length method)) out) | |
23f87bed MB |
855 | (when uses-stdin |
856 | (push "<" out) | |
857 | (push (mm-quote-arg | |
858 | (gnus-map-function mm-path-name-rewrite-functions file)) | |
859 | out)) | |
c113de23 | 860 | (mapconcat 'identity (nreverse out) ""))) |
a1506d29 | 861 | |
c113de23 GM |
862 | (defun mm-remove-parts (handles) |
863 | "Remove the displayed MIME parts represented by HANDLES." | |
864 | (if (and (listp handles) | |
865 | (bufferp (car handles))) | |
866 | (mm-remove-part handles) | |
867 | (let (handle) | |
868 | (while (setq handle (pop handles)) | |
869 | (cond | |
870 | ((stringp handle) | |
23f87bed MB |
871 | (when (buffer-live-p (get-text-property 0 'buffer handle)) |
872 | (kill-buffer (get-text-property 0 'buffer handle)))) | |
c113de23 GM |
873 | ((and (listp handle) |
874 | (stringp (car handle))) | |
875 | (mm-remove-parts (cdr handle))) | |
876 | (t | |
877 | (mm-remove-part handle))))))) | |
878 | ||
879 | (defun mm-destroy-parts (handles) | |
880 | "Remove the displayed MIME parts represented by HANDLES." | |
881 | (if (and (listp handles) | |
882 | (bufferp (car handles))) | |
883 | (mm-destroy-part handles) | |
884 | (let (handle) | |
885 | (while (setq handle (pop handles)) | |
886 | (cond | |
887 | ((stringp handle) | |
23f87bed MB |
888 | (when (buffer-live-p (get-text-property 0 'buffer handle)) |
889 | (kill-buffer (get-text-property 0 'buffer handle)))) | |
c113de23 GM |
890 | ((and (listp handle) |
891 | (stringp (car handle))) | |
23f87bed | 892 | (mm-destroy-parts handle)) |
c113de23 GM |
893 | (t |
894 | (mm-destroy-part handle))))))) | |
895 | ||
896 | (defun mm-remove-part (handle) | |
897 | "Remove the displayed MIME part represented by HANDLE." | |
898 | (when (listp handle) | |
899 | (let ((object (mm-handle-undisplayer handle))) | |
900 | (ignore-errors | |
901 | (cond | |
902 | ;; Internally displayed part. | |
903 | ((mm-annotationp object) | |
904 | (delete-annotation object)) | |
905 | ((or (functionp object) | |
906 | (and (listp object) | |
907 | (eq (car object) 'lambda))) | |
908 | (funcall object)) | |
909 | ;; Externally displayed part. | |
910 | ((consp object) | |
23f87bed MB |
911 | (condition-case () |
912 | (while (get-buffer-process (cdr object)) | |
913 | (interrupt-process (get-buffer-process (cdr object))) | |
914 | (message "Waiting for external displayer to die...") | |
915 | (sit-for 1)) | |
916 | (quit) | |
917 | (error)) | |
918 | (ignore-errors (and (cdr object) (kill-buffer (cdr object)))) | |
919 | (message "Waiting for external displayer to die...done") | |
c113de23 | 920 | (ignore-errors (delete-file (car object))) |
23f87bed MB |
921 | (ignore-errors (delete-directory (file-name-directory |
922 | (car object))))) | |
c113de23 GM |
923 | ((bufferp object) |
924 | (when (buffer-live-p object) | |
925 | (kill-buffer object))))) | |
926 | (mm-handle-set-undisplayer handle nil)))) | |
927 | ||
928 | (defun mm-display-inline (handle) | |
929 | (let* ((type (mm-handle-media-type handle)) | |
930 | (function (cadr (mm-assoc-string-match mm-inline-media-tests type)))) | |
931 | (funcall function handle) | |
932 | (goto-char (point-min)))) | |
933 | ||
934 | (defun mm-assoc-string-match (alist type) | |
935 | (dolist (elem alist) | |
936 | (when (string-match (car elem) type) | |
937 | (return elem)))) | |
938 | ||
23f87bed MB |
939 | (defun mm-automatic-display-p (handle) |
940 | "Say whether the user wants HANDLE to be displayed automatically." | |
941 | (let ((methods mm-automatic-display) | |
942 | (type (mm-handle-media-type handle)) | |
943 | method result) | |
944 | (while (setq method (pop methods)) | |
945 | (when (and (not (mm-inline-override-p handle)) | |
946 | (string-match method type)) | |
947 | (setq result t | |
948 | methods nil))) | |
949 | result)) | |
950 | ||
c113de23 GM |
951 | (defun mm-inlinable-p (handle) |
952 | "Say whether HANDLE can be displayed inline." | |
953 | (let ((alist mm-inline-media-tests) | |
954 | (type (mm-handle-media-type handle)) | |
955 | test) | |
956 | (while alist | |
957 | (when (string-match (caar alist) type) | |
958 | (setq test (caddar alist) | |
959 | alist nil) | |
960 | (setq test (funcall test handle))) | |
961 | (pop alist)) | |
962 | test)) | |
963 | ||
c113de23 | 964 | (defun mm-inlined-p (handle) |
23f87bed | 965 | "Say whether the user wants HANDLE to be displayed inline." |
c113de23 GM |
966 | (let ((methods mm-inlined-types) |
967 | (type (mm-handle-media-type handle)) | |
968 | method result) | |
969 | (while (setq method (pop methods)) | |
970 | (when (and (not (mm-inline-override-p handle)) | |
23f87bed | 971 | (string-match method type)) |
c113de23 GM |
972 | (setq result t |
973 | methods nil))) | |
974 | result)) | |
975 | ||
976 | (defun mm-attachment-override-p (handle) | |
977 | "Say whether HANDLE should have attachment behavior overridden." | |
978 | (let ((types mm-attachment-override-types) | |
979 | (type (mm-handle-media-type handle)) | |
980 | ty) | |
981 | (catch 'found | |
982 | (while (setq ty (pop types)) | |
983 | (when (and (string-match ty type) | |
984 | (mm-inlinable-p handle)) | |
985 | (throw 'found t)))))) | |
986 | ||
987 | (defun mm-inline-override-p (handle) | |
988 | "Say whether HANDLE should have inline behavior overridden." | |
989 | (let ((types mm-inline-override-types) | |
990 | (type (mm-handle-media-type handle)) | |
991 | ty) | |
992 | (catch 'found | |
993 | (while (setq ty (pop types)) | |
994 | (when (string-match ty type) | |
995 | (throw 'found t)))))) | |
996 | ||
997 | (defun mm-automatic-external-display-p (type) | |
998 | "Return the user-defined method for TYPE." | |
999 | (let ((methods mm-automatic-external-display) | |
1000 | method result) | |
1001 | (while (setq method (pop methods)) | |
1002 | (when (string-match method type) | |
1003 | (setq result t | |
1004 | methods nil))) | |
1005 | result)) | |
1006 | ||
1007 | (defun mm-destroy-part (handle) | |
1008 | "Destroy the data structures connected to HANDLE." | |
1009 | (when (listp handle) | |
1010 | (mm-remove-part handle) | |
1011 | (when (buffer-live-p (mm-handle-buffer handle)) | |
1012 | (kill-buffer (mm-handle-buffer handle))))) | |
1013 | ||
1014 | (defun mm-handle-displayed-p (handle) | |
1015 | "Say whether HANDLE is displayed or not." | |
1016 | (mm-handle-undisplayer handle)) | |
1017 | ||
1018 | ;;; | |
1019 | ;;; Functions for outputting parts | |
1020 | ;;; | |
1021 | ||
1022 | (defun mm-get-part (handle) | |
1023 | "Return the contents of HANDLE as a string." | |
1024 | (mm-with-unibyte-buffer | |
23f87bed MB |
1025 | (insert (with-current-buffer (mm-handle-buffer handle) |
1026 | (mm-with-unibyte-current-buffer | |
1027 | (buffer-string)))) | |
1028 | (mm-decode-content-transfer-encoding | |
1029 | (mm-handle-encoding handle) | |
1030 | (mm-handle-media-type handle)) | |
c113de23 GM |
1031 | (buffer-string))) |
1032 | ||
1033 | (defun mm-insert-part (handle) | |
1034 | "Insert the contents of HANDLE in the current buffer." | |
ddff82cf MB |
1035 | (save-excursion |
1036 | (insert (if (mm-multibyte-p) | |
1037 | (mm-string-as-multibyte (mm-get-part handle)) | |
1038 | (mm-get-part handle))))) | |
23f87bed MB |
1039 | |
1040 | (defun mm-file-name-delete-whitespace (file-name) | |
1041 | "Remove all whitespace characters from FILE-NAME." | |
1042 | (while (string-match "\\s-+" file-name) | |
1043 | (setq file-name (replace-match "" t t file-name))) | |
1044 | file-name) | |
1045 | ||
1046 | (defun mm-file-name-trim-whitespace (file-name) | |
1047 | "Remove leading and trailing whitespace characters from FILE-NAME." | |
1048 | (when (string-match "\\`\\s-+" file-name) | |
1049 | (setq file-name (substring file-name (match-end 0)))) | |
1050 | (when (string-match "\\s-+\\'" file-name) | |
1051 | (setq file-name (substring file-name 0 (match-beginning 0)))) | |
1052 | file-name) | |
1053 | ||
1054 | (defun mm-file-name-collapse-whitespace (file-name) | |
1055 | "Collapse multiple whitespace characters in FILE-NAME." | |
1056 | (while (string-match "\\s-\\s-+" file-name) | |
1057 | (setq file-name (replace-match " " t t file-name))) | |
1058 | file-name) | |
1059 | ||
1060 | (defun mm-file-name-replace-whitespace (file-name) | |
1061 | "Replace whitespace characters in FILE-NAME with underscores. | |
1062 | Set the option `mm-file-name-replace-whitespace' to any other | |
1063 | string if you do not like underscores." | |
1064 | (let ((s (or mm-file-name-replace-whitespace "_"))) | |
1065 | (while (string-match "\\s-" file-name) | |
1066 | (setq file-name (replace-match s t t file-name)))) | |
1067 | file-name) | |
1068 | ||
1069 | (defun mm-file-name-delete-control (filename) | |
1070 | "Delete control characters from FILENAME." | |
1071 | (gnus-replace-in-string filename "[\x00-\x1f\x7f]" "")) | |
1072 | ||
1073 | (defun mm-file-name-delete-gotchas (filename) | |
1074 | "Delete shell gotchas from FILENAME." | |
1075 | (setq filename (gnus-replace-in-string filename "[<>|]" "")) | |
1076 | (gnus-replace-in-string filename "^[.-]+" "")) | |
c113de23 GM |
1077 | |
1078 | (defun mm-save-part (handle) | |
1079 | "Write HANDLE to a file." | |
1080 | (let* ((name (mail-content-type-get (mm-handle-type handle) 'name)) | |
1081 | (filename (mail-content-type-get | |
1082 | (mm-handle-disposition handle) 'filename)) | |
1083 | file) | |
1084 | (when filename | |
23f87bed MB |
1085 | (setq filename (gnus-map-function mm-file-name-rewrite-functions |
1086 | (file-name-nondirectory filename)))) | |
c113de23 | 1087 | (setq file |
23f87bed MB |
1088 | (mm-with-multibyte |
1089 | (read-file-name "Save MIME part to: " | |
1090 | (or mm-default-directory default-directory) | |
1091 | nil nil (or filename name "")))) | |
c113de23 | 1092 | (setq mm-default-directory (file-name-directory file)) |
23f87bed MB |
1093 | (and (or (not (file-exists-p file)) |
1094 | (yes-or-no-p (format "File %s already exists; overwrite? " | |
1095 | file))) | |
1096 | (progn | |
1097 | (mm-save-part-to-file handle file) | |
1098 | file)))) | |
c113de23 GM |
1099 | |
1100 | (defun mm-save-part-to-file (handle file) | |
1101 | (mm-with-unibyte-buffer | |
1102 | (mm-insert-part handle) | |
1103 | (let ((coding-system-for-write 'binary) | |
23f87bed | 1104 | (current-file-modes (default-file-modes)) |
c113de23 GM |
1105 | ;; Don't re-compress .gz & al. Arguably we should make |
1106 | ;; `file-name-handler-alist' nil, but that would chop | |
1107 | ;; ange-ftp, which is reasonable to use here. | |
1108 | (inhibit-file-name-operation 'write-region) | |
1109 | (inhibit-file-name-handlers | |
1110 | (cons 'jka-compr-handler inhibit-file-name-handlers))) | |
23f87bed MB |
1111 | (set-default-file-modes mm-attachment-file-modes) |
1112 | (unwind-protect | |
1113 | (write-region (point-min) (point-max) file) | |
1114 | (set-default-file-modes current-file-modes))))) | |
c113de23 GM |
1115 | |
1116 | (defun mm-pipe-part (handle) | |
1117 | "Pipe HANDLE to a process." | |
1118 | (let* ((name (mail-content-type-get (mm-handle-type handle) 'name)) | |
1119 | (command | |
1120 | (read-string "Shell command on MIME part: " mm-last-shell-command))) | |
1121 | (mm-with-unibyte-buffer | |
1122 | (mm-insert-part handle) | |
23f87bed MB |
1123 | (let ((coding-system-for-write 'binary)) |
1124 | (shell-command-on-region (point-min) (point-max) command nil))))) | |
c113de23 GM |
1125 | |
1126 | (defun mm-interactively-view-part (handle) | |
1127 | "Display HANDLE using METHOD." | |
1128 | (let* ((type (mm-handle-media-type handle)) | |
1129 | (methods | |
1130 | (mapcar (lambda (i) (list (cdr (assoc 'viewer i)))) | |
1131 | (mailcap-mime-info type 'all))) | |
62a27ccf DL |
1132 | (method (let ((minibuffer-local-completion-map |
1133 | mm-viewer-completion-map)) | |
1134 | (completing-read "Viewer: " methods)))) | |
c113de23 GM |
1135 | (when (string= method "") |
1136 | (error "No method given")) | |
5bb548d2 | 1137 | (if (string-match "^[^% \t]+$" method) |
c113de23 | 1138 | (setq method (concat method " %s"))) |
619ac84f | 1139 | (mm-display-external handle method))) |
c113de23 GM |
1140 | |
1141 | (defun mm-preferred-alternative (handles &optional preferred) | |
1142 | "Say which of HANDLES are preferred." | |
1143 | (let ((prec (if preferred (list preferred) | |
1144 | (mm-preferred-alternative-precedence handles))) | |
1145 | p h result type handle) | |
1146 | (while (setq p (pop prec)) | |
1147 | (setq h handles) | |
1148 | (while h | |
1149 | (setq handle (car h)) | |
1150 | (setq type (mm-handle-media-type handle)) | |
1151 | (when (and (equal p type) | |
1152 | (mm-automatic-display-p handle) | |
1153 | (or (stringp (car handle)) | |
1154 | (not (mm-handle-disposition handle)) | |
1155 | (equal (car (mm-handle-disposition handle)) | |
1156 | "inline"))) | |
1157 | (setq result handle | |
1158 | h nil | |
1159 | prec nil)) | |
1160 | (pop h))) | |
1161 | result)) | |
1162 | ||
1163 | (defun mm-preferred-alternative-precedence (handles) | |
1164 | "Return the precedence based on HANDLES and `mm-discouraged-alternatives'." | |
1165 | (let ((seq (nreverse (mapcar #'mm-handle-media-type | |
1166 | handles)))) | |
1167 | (dolist (disc (reverse mm-discouraged-alternatives)) | |
1168 | (dolist (elem (copy-sequence seq)) | |
1169 | (when (string-match disc elem) | |
1170 | (setq seq (nconc (delete elem seq) (list elem)))))) | |
1171 | seq)) | |
1172 | ||
1173 | (defun mm-get-content-id (id) | |
1174 | "Return the handle(s) referred to by ID." | |
1175 | (cdr (assoc id mm-content-id-alist))) | |
1176 | ||
23f87bed MB |
1177 | (defconst mm-image-type-regexps |
1178 | '(("/\\*.*XPM.\\*/" . xpm) | |
1179 | ("P[1-6]" . pbm) | |
1180 | ("GIF8" . gif) | |
1181 | ("\377\330" . jpeg) | |
1182 | ("\211PNG\r\n" . png) | |
1183 | ("#define" . xbm) | |
1184 | ("\\(MM\0\\*\\)\\|\\(II\\*\0\\)" . tiff) | |
1185 | ("%!PS" . postscript)) | |
1186 | "Alist of (REGEXP . IMAGE-TYPE) pairs used to auto-detect image types. | |
1187 | When the first bytes of an image file match REGEXP, it is assumed to | |
1188 | be of image type IMAGE-TYPE.") | |
1189 | ||
1190 | ;; Steal from image.el. image-type-from-data suffers multi-line matching bug. | |
1191 | (defun mm-image-type-from-buffer () | |
1192 | "Determine the image type from data in the current buffer. | |
1193 | Value is a symbol specifying the image type or nil if type cannot | |
1194 | be determined." | |
1195 | (let ((types mm-image-type-regexps) | |
1196 | type) | |
1197 | (goto-char (point-min)) | |
1198 | (while (and types (null type)) | |
1199 | (let ((regexp (car (car types))) | |
1200 | (image-type (cdr (car types)))) | |
1201 | (when (looking-at regexp) | |
1202 | (setq type image-type)) | |
1203 | (setq types (cdr types)))) | |
1204 | type)) | |
1205 | ||
c113de23 GM |
1206 | (defun mm-get-image (handle) |
1207 | "Return an image instance based on HANDLE." | |
1208 | (let ((type (mm-handle-media-subtype handle)) | |
1209 | spec) | |
1210 | ;; Allow some common translations. | |
1211 | (setq type | |
1212 | (cond | |
1213 | ((equal type "x-pixmap") | |
1214 | "xpm") | |
1215 | ((equal type "x-xbitmap") | |
1216 | "xbm") | |
5bb548d2 DL |
1217 | ((equal type "x-portable-bitmap") |
1218 | "pbm") | |
c113de23 GM |
1219 | (t type))) |
1220 | (or (mm-handle-cache handle) | |
1221 | (mm-with-unibyte-buffer | |
1222 | (mm-insert-part handle) | |
1223 | (prog1 | |
1224 | (setq spec | |
1225 | (ignore-errors | |
23f87bed MB |
1226 | ;; Avoid testing `make-glyph' since W3 may define |
1227 | ;; a bogus version of it. | |
c113de23 | 1228 | (if (fboundp 'create-image) |
23f87bed MB |
1229 | (create-image (buffer-string) |
1230 | (or (mm-image-type-from-buffer) | |
1231 | (intern type)) | |
1232 | 'data-p) | |
1233 | (mm-create-image-xemacs type)))) | |
c113de23 GM |
1234 | (mm-handle-set-cache handle spec)))))) |
1235 | ||
23f87bed MB |
1236 | (defun mm-create-image-xemacs (type) |
1237 | (cond | |
1238 | ((equal type "xbm") | |
1239 | ;; xbm images require special handling, since | |
1240 | ;; the only way to create glyphs from these | |
1241 | ;; (without a ton of work) is to write them | |
1242 | ;; out to a file, and then create a file | |
1243 | ;; specifier. | |
1244 | (let ((file (mm-make-temp-file | |
1245 | (expand-file-name "emm.xbm" | |
1246 | mm-tmp-directory)))) | |
1247 | (unwind-protect | |
1248 | (progn | |
1249 | (write-region (point-min) (point-max) file) | |
1250 | (make-glyph (list (cons 'x file)))) | |
1251 | (ignore-errors | |
1252 | (delete-file file))))) | |
1253 | (t | |
1254 | (make-glyph | |
1255 | (vector | |
1256 | (or (mm-image-type-from-buffer) | |
1257 | (intern type)) | |
1258 | :data (buffer-string)))))) | |
1259 | ||
c113de23 GM |
1260 | (defun mm-image-fit-p (handle) |
1261 | "Say whether the image in HANDLE will fit the current window." | |
1262 | (let ((image (mm-get-image handle))) | |
1263 | (if (fboundp 'glyph-width) | |
1264 | ;; XEmacs' glyphs can actually tell us about their width, so | |
1265 | ;; lets be nice and smart about them. | |
1266 | (or mm-inline-large-images | |
1267 | (and (< (glyph-width image) (window-pixel-width)) | |
1268 | (< (glyph-height image) (window-pixel-height)))) | |
1269 | (let* ((size (image-size image)) | |
1270 | (w (car size)) | |
1271 | (h (cdr size))) | |
1272 | (or mm-inline-large-images | |
1273 | (and (< h (1- (window-height))) ; Don't include mode line. | |
1274 | (< w (window-width)))))))) | |
1275 | ||
1276 | (defun mm-valid-image-format-p (format) | |
1277 | "Say whether FORMAT can be displayed natively by Emacs." | |
1278 | (cond | |
1279 | ;; Handle XEmacs | |
1280 | ((fboundp 'valid-image-instantiator-format-p) | |
1281 | (valid-image-instantiator-format-p format)) | |
1282 | ;; Handle Emacs 21 | |
1283 | ((fboundp 'image-type-available-p) | |
1284 | (and (display-graphic-p) | |
1285 | (image-type-available-p format))) | |
1286 | ;; Nobody else can do images yet. | |
1287 | (t | |
1288 | nil))) | |
1289 | ||
1290 | (defun mm-valid-and-fit-image-p (format handle) | |
1291 | "Say whether FORMAT can be displayed natively and HANDLE fits the window." | |
62a27ccf | 1292 | (and (mm-valid-image-format-p format) |
c113de23 GM |
1293 | (mm-image-fit-p handle))) |
1294 | ||
23f87bed MB |
1295 | (defun mm-find-part-by-type (handles type &optional notp recursive) |
1296 | "Search in HANDLES for part with TYPE. | |
1297 | If NOTP, returns first non-matching part. | |
1298 | If RECURSIVE, search recursively." | |
1299 | (let (handle) | |
1300 | (while handles | |
1301 | (if (and recursive (stringp (caar handles))) | |
1302 | (if (setq handle (mm-find-part-by-type (cdar handles) type | |
1303 | notp recursive)) | |
1304 | (setq handles nil)) | |
1305 | (if (if notp | |
1306 | (not (equal (mm-handle-media-type (car handles)) type)) | |
1307 | (equal (mm-handle-media-type (car handles)) type)) | |
1308 | (setq handle (car handles) | |
1309 | handles nil))) | |
1310 | (setq handles (cdr handles))) | |
1311 | handle)) | |
1312 | ||
1313 | (defun mm-find-raw-part-by-type (ctl type &optional notp) | |
1314 | (goto-char (point-min)) | |
1315 | (let* ((boundary (concat "--" (mm-handle-multipart-ctl-parameter ctl | |
1316 | 'boundary))) | |
1317 | (close-delimiter (concat "^" (regexp-quote boundary) "--[ \t]*$")) | |
1318 | start | |
1319 | (end (save-excursion | |
1320 | (goto-char (point-max)) | |
1321 | (if (re-search-backward close-delimiter nil t) | |
1322 | (match-beginning 0) | |
1323 | (point-max)))) | |
1324 | result) | |
1325 | (setq boundary (concat "^" (regexp-quote boundary) "[ \t]*$")) | |
1326 | (while (and (not result) | |
1327 | (re-search-forward boundary end t)) | |
1328 | (goto-char (match-beginning 0)) | |
1329 | (when start | |
1330 | (save-excursion | |
1331 | (save-restriction | |
1332 | (narrow-to-region start (1- (point))) | |
1333 | (when (let ((ctl (ignore-errors | |
1334 | (mail-header-parse-content-type | |
1335 | (mail-fetch-field "content-type"))))) | |
1336 | (if notp | |
1337 | (not (equal (car ctl) type)) | |
1338 | (equal (car ctl) type))) | |
1339 | (setq result (buffer-string)))))) | |
1340 | (forward-line 1) | |
1341 | (setq start (point))) | |
1342 | (when (and (not result) start) | |
1343 | (save-excursion | |
1344 | (save-restriction | |
1345 | (narrow-to-region start end) | |
1346 | (when (let ((ctl (ignore-errors | |
1347 | (mail-header-parse-content-type | |
1348 | (mail-fetch-field "content-type"))))) | |
1349 | (if notp | |
1350 | (not (equal (car ctl) type)) | |
1351 | (equal (car ctl) type))) | |
1352 | (setq result (buffer-string)))))) | |
1353 | result)) | |
1354 | ||
1355 | (defvar mm-security-handle nil) | |
1356 | ||
1357 | (defsubst mm-set-handle-multipart-parameter (handle parameter value) | |
1358 | ;; HANDLE could be a CTL. | |
1359 | (when handle | |
1360 | (put-text-property 0 (length (car handle)) parameter value | |
1361 | (car handle)))) | |
1362 | ||
1363 | (defun mm-possibly-verify-or-decrypt (parts ctl) | |
1364 | (let ((type (car ctl)) | |
1365 | (subtype (cadr (split-string (car ctl) "/"))) | |
1366 | (mm-security-handle ctl) ;; (car CTL) is the type. | |
1367 | protocol func functest) | |
1368 | (cond | |
1369 | ((or (equal type "application/x-pkcs7-mime") | |
1370 | (equal type "application/pkcs7-mime")) | |
1371 | (with-temp-buffer | |
1372 | (when (and (cond | |
1373 | ((eq mm-decrypt-option 'never) nil) | |
1374 | ((eq mm-decrypt-option 'always) t) | |
1375 | ((eq mm-decrypt-option 'known) t) | |
1376 | (t (y-or-n-p | |
1377 | (format "Decrypt (S/MIME) part? ")))) | |
1378 | (mm-view-pkcs7 parts)) | |
1379 | (setq parts (mm-dissect-buffer t))))) | |
1380 | ((equal subtype "signed") | |
1381 | (unless (and (setq protocol | |
1382 | (mm-handle-multipart-ctl-parameter ctl 'protocol)) | |
1383 | (not (equal protocol "multipart/mixed"))) | |
1384 | ;; The message is broken or draft-ietf-openpgp-multsig-01. | |
1385 | (let ((protocols mm-verify-function-alist)) | |
1386 | (while protocols | |
1387 | (if (and (or (not (setq functest (nth 3 (car protocols)))) | |
1388 | (funcall functest parts ctl)) | |
1389 | (mm-find-part-by-type parts (caar protocols) nil t)) | |
1390 | (setq protocol (caar protocols) | |
1391 | protocols nil) | |
1392 | (setq protocols (cdr protocols)))))) | |
1393 | (setq func (nth 1 (assoc protocol mm-verify-function-alist))) | |
1394 | (when (cond | |
1395 | ((eq mm-verify-option 'never) nil) | |
1396 | ((eq mm-verify-option 'always) t) | |
1397 | ((eq mm-verify-option 'known) | |
1398 | (and func | |
1399 | (or (not (setq functest | |
1400 | (nth 3 (assoc protocol | |
1401 | mm-verify-function-alist)))) | |
1402 | (funcall functest parts ctl)))) | |
1403 | (t | |
1404 | (y-or-n-p | |
1405 | (format "Verify signed (%s) part? " | |
1406 | (or (nth 2 (assoc protocol mm-verify-function-alist)) | |
1407 | (format "protocol=%s" protocol)))))) | |
1408 | (save-excursion | |
1409 | (if func | |
1410 | (funcall func parts ctl) | |
1411 | (mm-set-handle-multipart-parameter | |
1412 | mm-security-handle 'gnus-details | |
1413 | (format "Unknown sign protocol (%s)" protocol)))))) | |
1414 | ((equal subtype "encrypted") | |
1415 | (unless (setq protocol | |
1416 | (mm-handle-multipart-ctl-parameter ctl 'protocol)) | |
1417 | ;; The message is broken. | |
1418 | (let ((parts parts)) | |
1419 | (while parts | |
1420 | (if (assoc (mm-handle-media-type (car parts)) | |
1421 | mm-decrypt-function-alist) | |
1422 | (setq protocol (mm-handle-media-type (car parts)) | |
1423 | parts nil) | |
1424 | (setq parts (cdr parts)))))) | |
1425 | (setq func (nth 1 (assoc protocol mm-decrypt-function-alist))) | |
1426 | (when (cond | |
1427 | ((eq mm-decrypt-option 'never) nil) | |
1428 | ((eq mm-decrypt-option 'always) t) | |
1429 | ((eq mm-decrypt-option 'known) | |
1430 | (and func | |
1431 | (or (not (setq functest | |
1432 | (nth 3 (assoc protocol | |
1433 | mm-decrypt-function-alist)))) | |
1434 | (funcall functest parts ctl)))) | |
1435 | (t | |
1436 | (y-or-n-p | |
1437 | (format "Decrypt (%s) part? " | |
1438 | (or (nth 2 (assoc protocol mm-decrypt-function-alist)) | |
1439 | (format "protocol=%s" protocol)))))) | |
1440 | (save-excursion | |
1441 | (if func | |
1442 | (setq parts (funcall func parts ctl)) | |
1443 | (mm-set-handle-multipart-parameter | |
1444 | mm-security-handle 'gnus-details | |
1445 | (format "Unknown encrypt protocol (%s)" protocol)))))) | |
1446 | (t nil)) | |
1447 | parts)) | |
1448 | ||
1449 | (defun mm-multiple-handles (handles) | |
1450 | (and (listp handles) | |
1451 | (> (length handles) 1) | |
1452 | (or (listp (car handles)) | |
1453 | (stringp (car handles))))) | |
1454 | ||
1455 | (defun mm-complicated-handles (handles) | |
1456 | (and (listp (car handles)) | |
1457 | (> (length handles) 1))) | |
1458 | ||
1459 | (defun mm-merge-handles (handles1 handles2) | |
1460 | (append | |
1461 | (if (listp (car handles1)) | |
1462 | handles1 | |
1463 | (list handles1)) | |
1464 | (if (listp (car handles2)) | |
1465 | handles2 | |
1466 | (list handles2)))) | |
1467 | ||
1468 | (defun mm-readable-p (handle) | |
1469 | "Say whether the content of HANDLE is readable." | |
1470 | (and (< (with-current-buffer (mm-handle-buffer handle) | |
1471 | (buffer-size)) 10000) | |
1472 | (mm-with-unibyte-buffer | |
1473 | (mm-insert-part handle) | |
1474 | (and (eq (mm-body-7-or-8) '7bit) | |
1475 | (not (mm-long-lines-p 76)))))) | |
1476 | ||
c113de23 GM |
1477 | (provide 'mm-decode) |
1478 | ||
46cdaf24 | 1479 | ;; arch-tag: 4f35d360-56b8-4030-9388-3ed82d359b9b |
c113de23 | 1480 | ;;; mm-decode.el ends here |