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537ab246 BG |
1 | ;;; rmailmm.el --- MIME decoding and display stuff for RMAIL |
2 | ||
ab422c4d | 3 | ;; Copyright (C) 2006-2013 Free Software Foundation, Inc. |
537ab246 | 4 | |
6ea97e7e GM |
5 | ;; Author: Alexander Pohoyda |
6 | ;; Alex Schroeder | |
537ab246 BG |
7 | ;; Maintainer: FSF |
8 | ;; Keywords: mail | |
bd78fa1d | 9 | ;; Package: rmail |
537ab246 BG |
10 | |
11 | ;; This file is part of GNU Emacs. | |
12 | ||
13 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
14 | ;; it under the terms of the GNU General Public License as published by | |
15 | ;; the Free Software Foundation, either version 3 of the License, or | |
16 | ;; (at your option) any later version. | |
17 | ||
18 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
19 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | ;; GNU General Public License for more details. | |
22 | ||
23 | ;; You should have received a copy of the GNU General Public License | |
24 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
25 | ||
26 | ;;; Commentary: | |
27 | ||
28 | ;; Essentially based on the design of Alexander Pohoyda's MIME | |
73422054 | 29 | ;; extensions (mime-display.el and mime.el). |
d1be4ec2 KH |
30 | |
31 | ;; This file provides two operation modes for viewing a MIME message. | |
32 | ||
33 | ;; (1) When rmail-enable-mime is non-nil (now it is the default), the | |
34 | ;; function `rmail-show-mime' is automatically called. That function | |
35 | ;; shows a MIME message directly in RMAIL's view buffer. | |
36 | ||
37 | ;; (2) When rmail-enable-mime is nil, the command 'v' (or M-x | |
38 | ;; rmail-mime) shows a MIME message in a new buffer "*RMAIL*". | |
39 | ||
40 | ;; Both operations share the intermediate functions rmail-mime-process | |
41 | ;; and rmail-mime-process-multipart as below. | |
42 | ||
43 | ;; rmail-show-mime | |
44 | ;; +- rmail-mime-parse | |
45 | ;; | +- rmail-mime-process <--+------------+ | |
46 | ;; | | +---------+ | | |
47 | ;; | + rmail-mime-process-multipart --+ | |
48 | ;; | | |
49 | ;; + rmail-mime-insert <----------------+ | |
50 | ;; +- rmail-mime-insert-text | | |
51 | ;; +- rmail-mime-insert-bulk | | |
52 | ;; +- rmail-mime-insert-multipart --+ | |
53 | ;; | |
54 | ;; rmail-mime | |
55 | ;; +- rmail-mime-show <----------------------------------+ | |
7c420169 | 56 | ;; +- rmail-mime-process | |
d1be4ec2 KH |
57 | ;; +- rmail-mime-handle | |
58 | ;; +- rmail-mime-text-handler | | |
59 | ;; +- rmail-mime-bulk-handler | | |
60 | ;; | + rmail-mime-insert-bulk | |
61 | ;; +- rmail-mime-multipart-handler | | |
62 | ;; +- rmail-mime-process-multipart --+ | |
63 | ||
64 | ;; In addition, for the case of rmail-enable-mime being non-nil, this | |
65 | ;; file provides two functions rmail-insert-mime-forwarded-message and | |
66 | ;; rmail-insert-mime-resent-message for composing forwarded and resent | |
67 | ;; messages respectively. | |
537ab246 | 68 | |
2e9075d3 GM |
69 | ;; Todo: |
70 | ||
d1be4ec2 KH |
71 | ;; Make rmail-mime-media-type-handlers-alist usable in the first |
72 | ;; operation mode. | |
73 | ;; Handle multipart/alternative in the second operation mode. | |
a92cdd49 | 74 | ;; Offer the option to call external/internal viewers (doc-view, xpdf, etc). |
2e9075d3 | 75 | |
537ab246 BG |
76 | ;;; Code: |
77 | ||
78 | (require 'rmail) | |
79 | (require 'mail-parse) | |
d1be4ec2 | 80 | (require 'message) |
537ab246 | 81 | |
f4ce6150 | 82 | ;;; User options. |
537ab246 | 83 | |
e8652dd9 GM |
84 | (defgroup rmail-mime nil |
85 | "Rmail MIME handling options." | |
86 | :prefix "rmail-mime-" | |
87 | :group 'rmail) | |
88 | ||
537ab246 BG |
89 | (defcustom rmail-mime-media-type-handlers-alist |
90 | '(("multipart/.*" rmail-mime-multipart-handler) | |
91 | ("text/.*" rmail-mime-text-handler) | |
92 | ("text/\\(x-\\)?patch" rmail-mime-bulk-handler) | |
e8652dd9 | 93 | ("\\(image\\|audio\\|video\\|application\\)/.*" rmail-mime-bulk-handler)) |
f4ce6150 | 94 | "Functions to handle various content types. |
c8644de0 GM |
95 | This is an alist with elements of the form (REGEXP FUNCTION ...). |
96 | The first item is a regular expression matching a content-type. | |
97 | The remaining elements are handler functions to run, in order of | |
2e9075d3 GM |
98 | decreasing preference. These are called until one returns non-nil. |
99 | Note that this only applies to items with an inline Content-Disposition, | |
186f7f0b KH |
100 | all others are handled by `rmail-mime-bulk-handler'. |
101 | Note also that this alist is ignored when the variable | |
102 | `rmail-enable-mime' is non-nil." | |
c8644de0 | 103 | :type '(alist :key-type regexp :value-type (repeat function)) |
e8652dd9 GM |
104 | :version "23.1" |
105 | :group 'rmail-mime) | |
537ab246 BG |
106 | |
107 | (defcustom rmail-mime-attachment-dirs-alist | |
f265b4de | 108 | `(("text/.*" "~/Documents") |
537ab246 | 109 | ("image/.*" "~/Pictures") |
f265b4de | 110 | (".*" "~/Desktop" "~" ,temporary-file-directory)) |
f4ce6150 GM |
111 | "Default directories to save attachments of various types into. |
112 | This is an alist with elements of the form (REGEXP DIR ...). | |
113 | The first item is a regular expression matching a content-type. | |
114 | The remaining elements are directories, in order of decreasing preference. | |
115 | The first directory that exists is used." | |
116 | :type '(alist :key-type regexp :value-type (repeat directory)) | |
117 | :version "23.1" | |
e8652dd9 GM |
118 | :group 'rmail-mime) |
119 | ||
120 | (defcustom rmail-mime-show-images 'button | |
121 | "What to do with image attachments that Emacs is capable of displaying. | |
122 | If nil, do nothing special. If `button', add an extra button | |
a92cdd49 GM |
123 | that when pushed displays the image in the buffer. If a number, |
124 | automatically show images if they are smaller than that size (in | |
125 | bytes), otherwise add a display button. Anything else means to | |
126 | automatically display the image in the buffer." | |
e8652dd9 GM |
127 | :type '(choice (const :tag "Add button to view image" button) |
128 | (const :tag "No special treatment" nil) | |
a92cdd49 | 129 | (number :tag "Show if smaller than certain size") |
e8652dd9 GM |
130 | (other :tag "Always show" show)) |
131 | :version "23.2" | |
132 | :group 'rmail-mime) | |
537ab246 | 133 | |
f4ce6150 GM |
134 | ;;; End of user options. |
135 | ||
186f7f0b KH |
136 | ;;; Global variables that always have let-binding when referred. |
137 | ||
138 | (defvar rmail-mime-mbox-buffer nil | |
139 | "Buffer containing the mbox data. | |
140 | The value is usually nil, and bound to a proper value while | |
141 | processing MIME.") | |
142 | ||
143 | (defvar rmail-mime-view-buffer nil | |
144 | "Buffer showing a message. | |
145 | The value is usually nil, and bound to a proper value while | |
146 | processing MIME.") | |
147 | ||
148 | (defvar rmail-mime-coding-system nil | |
149 | "The first coding-system used for decoding a MIME entity. | |
150 | The value is usually nil, and bound to non-nil while inserting | |
151 | MIME entities.") | |
152 | ||
d1be4ec2 KH |
153 | ;;; MIME-entity object |
154 | ||
155 | (defun rmail-mime-entity (type disposition transfer-encoding | |
aa8a705c RS |
156 | display header tagline body children handler |
157 | &optional truncated) | |
672b871d | 158 | "Return a newly created MIME-entity object from arguments. |
d1be4ec2 | 159 | |
aa8a705c | 160 | A MIME-entity is a vector of 10 elements: |
d1be4ec2 | 161 | |
186f7f0b | 162 | [TYPE DISPOSITION TRANSFER-ENCODING DISPLAY HEADER TAGLINE BODY |
aa8a705c | 163 | CHILDREN HANDLER TRUNCATED] |
7c420169 | 164 | |
186f7f0b | 165 | TYPE and DISPOSITION correspond to MIME headers Content-Type and |
aa8a705c | 166 | Content-Disposition respectively, and have this format: |
d1be4ec2 KH |
167 | |
168 | \(VALUE (ATTRIBUTE . VALUE) (ATTRIBUTE . VALUE) ...) | |
169 | ||
aa8a705c | 170 | Each VALUE is a string and each ATTRIBUTE is a string. |
d1be4ec2 KH |
171 | |
172 | Consider the following header, for example: | |
173 | ||
174 | Content-Type: multipart/mixed; | |
175 | boundary=\"----=_NextPart_000_0104_01C617E4.BDEC4C40\" | |
176 | ||
177 | The corresponding TYPE argument must be: | |
178 | ||
179 | \(\"multipart/mixed\" | |
180 | \(\"boundary\" . \"----=_NextPart_000_0104_01C617E4.BDEC4C40\")) | |
181 | ||
182 | TRANSFER-ENCODING corresponds to MIME header | |
672b871d | 183 | Content-Transfer-Encoding, and is a lower-case string. |
d1be4ec2 | 184 | |
186f7f0b | 185 | DISPLAY is a vector [CURRENT NEW], where CURRENT indicates how |
672b871d GM |
186 | the header, tag line, and body of the entity are displayed now, |
187 | and NEW indicates how their display should be updated. | |
188 | Both elements are vectors [HEADER-DISPLAY TAGLINE-DISPLAY BODY-DISPLAY], | |
189 | where each constituent element is a symbol for the corresponding | |
190 | item with these values: | |
186f7f0b | 191 | nil: not displayed |
672b871d | 192 | t: displayed by the decoded presentation form |
186f7f0b KH |
193 | raw: displayed by the raw MIME data (for the header and body only) |
194 | ||
195 | HEADER and BODY are vectors [BEG END DISPLAY-FLAG], where BEG and | |
354cf0ba RS |
196 | END are markers that specify the region of the header or body lines |
197 | in RMAIL's data (mbox) buffer, and DISPLAY-FLAG non-nil means that the | |
186f7f0b KH |
198 | header or body is, by default, displayed by the decoded |
199 | presentation form. | |
200 | ||
201 | TAGLINE is a vector [TAG BULK-DATA DISPLAY-FLAG], where TAG is a | |
202 | string indicating the depth and index number of the entity, | |
203 | BULK-DATA is a cons (SIZE . TYPE) indicating the size and type of | |
672b871d GM |
204 | an attached data, DISPLAY-FLAG non-nil means that the tag line is |
205 | displayed by default. | |
186f7f0b KH |
206 | |
207 | CHILDREN is a list of child MIME-entities. A \"multipart/*\" | |
672b871d | 208 | entity has one or more children. A \"message/rfc822\" entity |
186f7f0b KH |
209 | has just one child. Any other entity has no child. |
210 | ||
211 | HANDLER is a function to insert the entity according to DISPLAY. | |
aa8a705c RS |
212 | It is called with one argument ENTITY. |
213 | ||
214 | TRUNCATED is non-nil if the text of this entity was truncated." | |
215 | ||
186f7f0b | 216 | (vector type disposition transfer-encoding |
aa8a705c | 217 | display header tagline body children handler truncated)) |
d1be4ec2 KH |
218 | |
219 | ;; Accessors for a MIME-entity object. | |
220 | (defsubst rmail-mime-entity-type (entity) (aref entity 0)) | |
221 | (defsubst rmail-mime-entity-disposition (entity) (aref entity 1)) | |
222 | (defsubst rmail-mime-entity-transfer-encoding (entity) (aref entity 2)) | |
186f7f0b KH |
223 | (defsubst rmail-mime-entity-display (entity) (aref entity 3)) |
224 | (defsubst rmail-mime-entity-header (entity) (aref entity 4)) | |
225 | (defsubst rmail-mime-entity-tagline (entity) (aref entity 5)) | |
226 | (defsubst rmail-mime-entity-body (entity) (aref entity 6)) | |
227 | (defsubst rmail-mime-entity-children (entity) (aref entity 7)) | |
228 | (defsubst rmail-mime-entity-handler (entity) (aref entity 8)) | |
aa8a705c RS |
229 | (defsubst rmail-mime-entity-truncated (entity) (aref entity 9)) |
230 | (defsubst rmail-mime-entity-set-truncated (entity truncated) | |
231 | (aset entity 9 truncated)) | |
186f7f0b KH |
232 | |
233 | (defsubst rmail-mime-message-p () | |
234 | "Non-nil if and only if the current message is a MIME." | |
235 | (or (get-text-property (point) 'rmail-mime-entity) | |
236 | (get-text-property (point-min) 'rmail-mime-entity))) | |
f4ce6150 | 237 | |
537ab246 BG |
238 | ;;; Buttons |
239 | ||
240 | (defun rmail-mime-save (button) | |
241 | "Save the attachment using info in the BUTTON." | |
186f7f0b KH |
242 | (let* ((rmail-mime-mbox-buffer rmail-view-buffer) |
243 | (filename (button-get button 'filename)) | |
537ab246 | 244 | (directory (button-get button 'directory)) |
fe6793d4 GM |
245 | (data (button-get button 'data)) |
246 | (ofilename filename)) | |
aa8a705c RS |
247 | (if (and (not (stringp data)) |
248 | (rmail-mime-entity-truncated data)) | |
249 | (unless (y-or-n-p "This entity is truncated; save anyway? ") | |
250 | (error "Aborted"))) | |
537ab246 BG |
251 | (setq filename (expand-file-name |
252 | (read-file-name (format "Save as (default: %s): " filename) | |
253 | directory | |
254 | (expand-file-name filename directory)) | |
255 | directory)) | |
fe6793d4 GM |
256 | ;; If arg is just a directory, use the default file name, but in |
257 | ;; that directory (copied from write-file). | |
258 | (if (file-directory-p filename) | |
259 | (setq filename (expand-file-name | |
260 | (file-name-nondirectory ofilename) | |
261 | (file-name-as-directory filename)))) | |
262 | (with-temp-buffer | |
537ab246 | 263 | (set-buffer-file-coding-system 'no-conversion) |
134a027f EZ |
264 | ;; Needed e.g. by jka-compr, so if the attachment is a compressed |
265 | ;; file, the magic signature compares equal with the unibyte | |
266 | ;; signature string recorded in jka-compr-compression-info-list. | |
267 | (set-buffer-multibyte nil) | |
d1be4ec2 KH |
268 | (setq buffer-undo-list t) |
269 | (if (stringp data) | |
270 | (insert data) | |
271 | ;; DATA is a MIME-entity object. | |
272 | (let ((transfer-encoding (rmail-mime-entity-transfer-encoding data)) | |
273 | (body (rmail-mime-entity-body data))) | |
186f7f0b KH |
274 | (insert-buffer-substring rmail-mime-mbox-buffer |
275 | (aref body 0) (aref body 1)) | |
d1be4ec2 KH |
276 | (cond ((string= transfer-encoding "base64") |
277 | (ignore-errors (base64-decode-region (point-min) (point-max)))) | |
278 | ((string= transfer-encoding "quoted-printable") | |
279 | (quoted-printable-decode-region (point-min) (point-max)))))) | |
fe6793d4 | 280 | (write-region nil nil filename nil nil nil t)))) |
537ab246 | 281 | |
fe6793d4 | 282 | (define-button-type 'rmail-mime-save 'action 'rmail-mime-save) |
537ab246 | 283 | |
49ae5b39 EZ |
284 | ;; Display options returned by rmail-mime-entity-display. |
285 | ;; Value is on of nil, t, raw. | |
286 | (defsubst rmail-mime-display-header (disp) (aref disp 0)) | |
287 | (defsubst rmail-mime-display-tagline (disp) (aref disp 1)) | |
288 | (defsubst rmail-mime-display-body (disp) (aref disp 2)) | |
289 | ||
186f7f0b KH |
290 | (defun rmail-mime-entity-segment (pos &optional entity) |
291 | "Return a vector describing the displayed region of a MIME-entity at POS. | |
292 | Optional 2nd argument ENTITY is the MIME-entity at POS. | |
672b871d GM |
293 | The value is a vector [INDEX HEADER TAGLINE BODY END], where |
294 | INDEX: index into the returned vector indicating where POS is (1..3) | |
186f7f0b | 295 | HEADER: the position of the beginning of a header |
49ae5b39 EZ |
296 | TAGLINE: the position of the beginning of a tag line, including |
297 | the newline that precedes it | |
186f7f0b | 298 | BODY: the position of the beginning of a body |
e7ca0062 | 299 | END: the position of the end of the entity." |
186f7f0b KH |
300 | (save-excursion |
301 | (or entity | |
302 | (setq entity (get-text-property pos 'rmail-mime-entity))) | |
303 | (if (not entity) | |
304 | (vector 1 (point) (point) (point) (point)) | |
305 | (let ((current (aref (rmail-mime-entity-display entity) 0)) | |
306 | (beg (if (and (> pos (point-min)) | |
307 | (eq (get-text-property (1- pos) 'rmail-mime-entity) | |
308 | entity)) | |
309 | (previous-single-property-change pos 'rmail-mime-entity | |
310 | nil (point-min)) | |
311 | pos)) | |
312 | (index 1) | |
313 | tagline-beg body-beg end) | |
314 | (goto-char beg) | |
49ae5b39 EZ |
315 | ;; If the header is displayed, get past it to the tagline. |
316 | (if (rmail-mime-display-header current) | |
186f7f0b KH |
317 | (search-forward "\n\n" nil t)) |
318 | (setq tagline-beg (point)) | |
319 | (if (>= pos tagline-beg) | |
320 | (setq index 2)) | |
49ae5b39 EZ |
321 | ;; If the tagline is displayed, get past it to the body. |
322 | (if (rmail-mime-display-tagline current) | |
99d99081 | 323 | ;; The next forward-line call must be in sync with how |
49ae5b39 EZ |
324 | ;; `rmail-mime-insert-tagline' formats the tagline. The |
325 | ;; body begins after the empty line that ends the tagline. | |
326 | (forward-line 3)) | |
186f7f0b KH |
327 | (setq body-beg (point)) |
328 | (if (>= pos body-beg) | |
329 | (setq index 3)) | |
49ae5b39 EZ |
330 | ;; If the body is displayed, find its end. |
331 | (if (rmail-mime-display-body current) | |
186f7f0b KH |
332 | (let ((tag (aref (rmail-mime-entity-tagline entity) 0)) |
333 | tag2) | |
334 | (setq end (next-single-property-change beg 'rmail-mime-entity | |
335 | nil (point-max))) | |
49ae5b39 EZ |
336 | ;; `tag' is either an empty string or "/n" where n is |
337 | ;; the number of the part of the multipart MIME message. | |
338 | ;; The loop below finds the next location whose | |
339 | ;; `rmail-mime-entity' property specifies a tag of a | |
340 | ;; different value. | |
186f7f0b KH |
341 | (while (and (< end (point-max)) |
342 | (setq entity (get-text-property end 'rmail-mime-entity) | |
343 | tag2 (aref (rmail-mime-entity-tagline entity) 0)) | |
344 | (and (> (length tag2) 0) | |
345 | (eq (string-match tag tag2) 0))) | |
346 | (setq end (next-single-property-change end 'rmail-mime-entity | |
347 | nil (point-max))))) | |
348 | (setq end body-beg)) | |
349 | (vector index beg tagline-beg body-beg end))))) | |
350 | ||
186f7f0b | 351 | (defun rmail-mime-shown-mode (entity) |
672b871d | 352 | "Make MIME-entity ENTITY display in the default way." |
186f7f0b KH |
353 | (let ((new (aref (rmail-mime-entity-display entity) 1))) |
354 | (aset new 0 (aref (rmail-mime-entity-header entity) 2)) | |
355 | (aset new 1 (aref (rmail-mime-entity-tagline entity) 2)) | |
e7ca0062 | 356 | (aset new 2 (aref (rmail-mime-entity-body entity) 2))) |
186f7f0b | 357 | (dolist (child (rmail-mime-entity-children entity)) |
e7ca0062 | 358 | (rmail-mime-shown-mode child))) |
d52969e8 | 359 | |
e7ca0062 | 360 | (defun rmail-mime-hidden-mode (entity) |
672b871d | 361 | "Make MIME-entity ENTITY display in hidden mode." |
e7ca0062 KH |
362 | (let ((new (aref (rmail-mime-entity-display entity) 1))) |
363 | (aset new 0 nil) | |
364 | (aset new 1 t) | |
365 | (aset new 2 nil)) | |
186f7f0b | 366 | (dolist (child (rmail-mime-entity-children entity)) |
e7ca0062 | 367 | (rmail-mime-hidden-mode child))) |
186f7f0b KH |
368 | |
369 | (defun rmail-mime-raw-mode (entity) | |
672b871d | 370 | "Make MIME-entity ENTITY display in raw mode." |
186f7f0b KH |
371 | (let ((new (aref (rmail-mime-entity-display entity) 1))) |
372 | (aset new 0 'raw) | |
373 | (aset new 1 nil) | |
e7ca0062 KH |
374 | (aset new 2 'raw)) |
375 | (dolist (child (rmail-mime-entity-children entity)) | |
376 | (rmail-mime-raw-mode child))) | |
186f7f0b | 377 | |
d20faa20 GM |
378 | (defun rmail-mime-toggle-raw (&optional state) |
379 | "Toggle on and off the raw display mode of MIME-entity at point. | |
380 | With optional argument STATE, force the specified display mode. | |
381 | Use `raw' for raw mode, and any other non-nil value for decoded mode." | |
186f7f0b KH |
382 | (let* ((pos (if (eobp) (1- (point-max)) (point))) |
383 | (entity (get-text-property pos 'rmail-mime-entity)) | |
384 | (current (aref (rmail-mime-entity-display entity) 0)) | |
385 | (segment (rmail-mime-entity-segment pos entity))) | |
d20faa20 GM |
386 | (if (or (eq state 'raw) |
387 | (and (not state) | |
49ae5b39 | 388 | (not (eq (rmail-mime-display-header current) 'raw)))) |
186f7f0b KH |
389 | ;; Enter the raw mode. |
390 | (rmail-mime-raw-mode entity) | |
391 | ;; Enter the shown mode. | |
0dee970c RS |
392 | (rmail-mime-shown-mode entity) |
393 | (let ((inhibit-read-only t) | |
394 | (modified (buffer-modified-p))) | |
395 | (save-excursion | |
396 | (goto-char (aref segment 1)) | |
397 | (rmail-mime-insert entity) | |
398 | (restore-buffer-modified-p modified)))))) | |
186f7f0b KH |
399 | |
400 | (defun rmail-mime-toggle-hidden () | |
672b871d | 401 | "Hide or show the body of the MIME-entity at point." |
186f7f0b KH |
402 | (interactive) |
403 | (when (rmail-mime-message-p) | |
404 | (let* ((rmail-mime-mbox-buffer rmail-view-buffer) | |
405 | (rmail-mime-view-buffer (current-buffer)) | |
406 | (pos (if (eobp) (1- (point-max)) (point))) | |
407 | (entity (get-text-property pos 'rmail-mime-entity)) | |
408 | (current (aref (rmail-mime-entity-display entity) 0)) | |
409 | (segment (rmail-mime-entity-segment pos entity))) | |
49ae5b39 | 410 | (if (rmail-mime-display-body current) |
186f7f0b KH |
411 | ;; Enter the hidden mode. |
412 | (progn | |
413 | ;; If point is in the body part, move it to the tagline | |
e7ca0062 | 414 | ;; (or the header if tagline is not displayed). |
186f7f0b KH |
415 | (if (= (aref segment 0) 3) |
416 | (goto-char (aref segment 2))) | |
e7ca0062 | 417 | (rmail-mime-hidden-mode entity) |
186f7f0b KH |
418 | ;; If the current entity is the topmost one, display the |
419 | ;; header. | |
420 | (if (and rmail-mime-mbox-buffer (= (aref segment 1) (point-min))) | |
421 | (let ((new (aref (rmail-mime-entity-display entity) 1))) | |
422 | (aset new 0 t)))) | |
aa8a705c RS |
423 | ;; Query as a warning before showing if truncated. |
424 | (if (and (not (stringp entity)) | |
425 | (rmail-mime-entity-truncated entity)) | |
426 | (unless (y-or-n-p "This entity is truncated; show anyway? ") | |
427 | (error "Aborted"))) | |
186f7f0b | 428 | ;; Enter the shown mode. |
e7ca0062 KH |
429 | (rmail-mime-shown-mode entity) |
430 | ;; Force this body shown. | |
431 | (aset (aref (rmail-mime-entity-display entity) 1) 2 t)) | |
186f7f0b KH |
432 | (let ((inhibit-read-only t) |
433 | (modified (buffer-modified-p)) | |
434 | (rmail-mime-mbox-buffer rmail-view-buffer) | |
435 | (rmail-mime-view-buffer rmail-buffer)) | |
436 | (save-excursion | |
437 | (goto-char (aref segment 1)) | |
438 | (rmail-mime-insert entity) | |
439 | (restore-buffer-modified-p modified)))))) | |
440 | ||
e7ca0062 KH |
441 | (define-key rmail-mode-map "\t" 'forward-button) |
442 | (define-key rmail-mode-map [backtab] 'backward-button) | |
186f7f0b KH |
443 | (define-key rmail-mode-map "\r" 'rmail-mime-toggle-hidden) |
444 | ||
537ab246 BG |
445 | ;;; Handlers |
446 | ||
186f7f0b KH |
447 | (defun rmail-mime-insert-tagline (entity &rest item-list) |
448 | "Insert a tag line for MIME-entity ENTITY. | |
672b871d | 449 | ITEM-LIST is a list of strings or button-elements (list) to add |
186f7f0b | 450 | to the tag line." |
49ae5b39 EZ |
451 | ;; Precede the tagline by an empty line to make it a separate |
452 | ;; paragraph, so that it is aligned to the left margin of the window | |
453 | ;; even if preceded by a right-to-left paragraph. | |
a3cf097f | 454 | (insert "\n[") |
186f7f0b KH |
455 | (let ((tag (aref (rmail-mime-entity-tagline entity) 0))) |
456 | (if (> (length tag) 0) (insert (substring tag 1) ":"))) | |
e7ca0062 KH |
457 | (insert (car (rmail-mime-entity-type entity)) " ") |
458 | (insert-button (let ((new (aref (rmail-mime-entity-display entity) 1))) | |
49ae5b39 | 459 | (if (rmail-mime-display-body new) "Hide" "Show")) |
e7ca0062 KH |
460 | :type 'rmail-mime-toggle |
461 | 'help-echo "mouse-2, RET: Toggle show/hide") | |
186f7f0b KH |
462 | (dolist (item item-list) |
463 | (when item | |
464 | (if (stringp item) | |
465 | (insert item) | |
466 | (apply 'insert-button item)))) | |
49ae5b39 EZ |
467 | ;; Follow the tagline by an empty line to make it a separate |
468 | ;; paragraph, so that the paragraph direction of the following text | |
469 | ;; is determined based on that text. | |
a3cf097f | 470 | (insert "]\n\n")) |
7c420169 | 471 | |
e7ca0062 KH |
472 | (defun rmail-mime-update-tagline (entity) |
473 | "Update the current tag line for MIME-entity ENTITY." | |
474 | (let ((inhibit-read-only t) | |
475 | (modified (buffer-modified-p)) | |
476 | ;; If we are going to show the body, the new button label is | |
477 | ;; "Hide". Otherwise, it's "Show". | |
478 | (label (if (aref (aref (rmail-mime-entity-display entity) 1) 2) "Hide" | |
479 | "Show")) | |
480 | (button (next-button (point)))) | |
481 | ;; Go to the second character of the button "Show" or "Hide". | |
482 | (goto-char (1+ (button-start button))) | |
483 | (setq button (button-at (point))) | |
484 | (save-excursion | |
485 | (insert label) | |
486 | (delete-region (point) (button-end button))) | |
487 | (delete-region (button-start button) (point)) | |
488 | (put-text-property (point) (button-end button) 'rmail-mime-entity entity) | |
489 | (restore-buffer-modified-p modified) | |
49ae5b39 EZ |
490 | ;; The following call to forward-line must be in sync with how |
491 | ;; rmail-mime-insert-tagline formats the tagline. | |
492 | (forward-line 2))) | |
e7ca0062 | 493 | |
186f7f0b KH |
494 | (defun rmail-mime-insert-header (header) |
495 | "Decode and insert a MIME-entity header HEADER in the current buffer. | |
496 | HEADER is a vector [BEG END DEFAULT-STATUS]. | |
672b871d | 497 | See `rmail-mime-entity' for details." |
186f7f0b KH |
498 | (let ((pos (point)) |
499 | (last-coding-system-used nil)) | |
500 | (save-restriction | |
501 | (narrow-to-region pos pos) | |
502 | (with-current-buffer rmail-mime-mbox-buffer | |
503 | (let ((rmail-buffer rmail-mime-mbox-buffer) | |
504 | (rmail-view-buffer rmail-mime-view-buffer)) | |
505 | (save-excursion | |
506 | (goto-char (aref header 0)) | |
507 | (rmail-copy-headers (point) (aref header 1))))) | |
508 | (rfc2047-decode-region pos (point)) | |
509 | (if (and last-coding-system-used (not rmail-mime-coding-system)) | |
1a6a03e4 | 510 | (setq rmail-mime-coding-system (cons last-coding-system-used nil))) |
186f7f0b KH |
511 | (goto-char (point-min)) |
512 | (rmail-highlight-headers) | |
513 | (goto-char (point-max)) | |
514 | (insert "\n")))) | |
515 | ||
1a6a03e4 | 516 | (defun rmail-mime-find-header-encoding (header) |
0b381c7e | 517 | "Return the last coding system used to decode HEADER. |
1a6a03e4 KH |
518 | HEADER is a header component of a MIME-entity object (see |
519 | `rmail-mime-entity')." | |
520 | (with-temp-buffer | |
16bc9688 | 521 | (let ((buf (current-buffer))) |
1a6a03e4 | 522 | (with-current-buffer rmail-mime-mbox-buffer |
16bc9688 KH |
523 | (let ((last-coding-system-used nil) |
524 | (rmail-buffer rmail-mime-mbox-buffer) | |
525 | (rmail-view-buffer buf)) | |
1a6a03e4 KH |
526 | (save-excursion |
527 | (goto-char (aref header 0)) | |
528 | (rmail-copy-headers (point) (aref header 1))))) | |
529 | (rfc2047-decode-region (point-min) (point-max)) | |
530 | last-coding-system-used))) | |
531 | ||
537ab246 BG |
532 | (defun rmail-mime-text-handler (content-type |
533 | content-disposition | |
534 | content-transfer-encoding) | |
535 | "Handle the current buffer as a plain text MIME part." | |
186f7f0b KH |
536 | (rmail-mime-insert-text |
537 | (rmail-mime-entity content-type content-disposition | |
538 | content-transfer-encoding | |
539 | (vector (vector nil nil nil) (vector nil nil t)) | |
540 | (vector nil nil nil) (vector "" (cons nil nil) t) | |
541 | (vector nil nil nil) nil 'rmail-mime-insert-text)) | |
542 | t) | |
543 | ||
544 | (defun rmail-mime-insert-decoded-text (entity) | |
545 | "Decode and insert the text body of MIME-entity ENTITY." | |
d1be4ec2 KH |
546 | (let* ((content-type (rmail-mime-entity-type entity)) |
547 | (charset (cdr (assq 'charset (cdr content-type)))) | |
186f7f0b KH |
548 | (coding-system (if charset |
549 | (coding-system-from-name charset))) | |
550 | (body (rmail-mime-entity-body entity)) | |
551 | (pos (point))) | |
552 | (or (and coding-system (coding-system-p coding-system)) | |
553 | (setq coding-system 'undecided)) | |
554 | (if (stringp (aref body 0)) | |
555 | (insert (aref body 0)) | |
556 | (let ((transfer-encoding (rmail-mime-entity-transfer-encoding entity))) | |
557 | (insert-buffer-substring rmail-mime-mbox-buffer | |
558 | (aref body 0) (aref body 1)) | |
559 | (cond ((string= transfer-encoding "base64") | |
560 | (ignore-errors (base64-decode-region pos (point)))) | |
561 | ((string= transfer-encoding "quoted-printable") | |
562 | (quoted-printable-decode-region pos (point)))))) | |
563 | (decode-coding-region pos (point) coding-system) | |
16bc9688 KH |
564 | (if (and |
565 | (or (not rmail-mime-coding-system) (consp rmail-mime-coding-system)) | |
566 | (not (eq (coding-system-base coding-system) 'us-ascii))) | |
186f7f0b KH |
567 | (setq rmail-mime-coding-system coding-system)) |
568 | (or (bolp) (insert "\n")))) | |
569 | ||
570 | (defun rmail-mime-insert-text (entity) | |
571 | "Presentation handler for a plain text MIME entity." | |
572 | (let ((current (aref (rmail-mime-entity-display entity) 0)) | |
573 | (new (aref (rmail-mime-entity-display entity) 1)) | |
574 | (header (rmail-mime-entity-header entity)) | |
575 | (tagline (rmail-mime-entity-tagline entity)) | |
576 | (body (rmail-mime-entity-body entity)) | |
577 | (beg (point)) | |
578 | (segment (rmail-mime-entity-segment (point) entity))) | |
579 | ||
354cf0ba | 580 | (or (integerp (aref body 0)) (markerp (aref body 0)) |
186f7f0b KH |
581 | (let ((data (buffer-string))) |
582 | (aset body 0 data) | |
583 | (delete-region (point-min) (point-max)))) | |
584 | ||
585 | ;; header | |
49ae5b39 EZ |
586 | (if (eq (rmail-mime-display-header current) |
587 | (rmail-mime-display-header new)) | |
186f7f0b | 588 | (goto-char (aref segment 2)) |
49ae5b39 | 589 | (if (rmail-mime-display-header current) |
186f7f0b | 590 | (delete-char (- (aref segment 2) (aref segment 1)))) |
49ae5b39 | 591 | (if (rmail-mime-display-header new) |
186f7f0b KH |
592 | (rmail-mime-insert-header header))) |
593 | ;; tagline | |
49ae5b39 EZ |
594 | (if (eq (rmail-mime-display-tagline current) |
595 | (rmail-mime-display-tagline new)) | |
596 | (if (or (not (rmail-mime-display-tagline current)) | |
597 | (eq (rmail-mime-display-body current) | |
598 | (rmail-mime-display-body new))) | |
e7ca0062 KH |
599 | (forward-char (- (aref segment 3) (aref segment 2))) |
600 | (rmail-mime-update-tagline entity)) | |
49ae5b39 | 601 | (if (rmail-mime-display-tagline current) |
186f7f0b | 602 | (delete-char (- (aref segment 3) (aref segment 2)))) |
49ae5b39 | 603 | (if (rmail-mime-display-tagline new) |
186f7f0b KH |
604 | (rmail-mime-insert-tagline entity))) |
605 | ;; body | |
49ae5b39 EZ |
606 | (if (eq (rmail-mime-display-body current) |
607 | (rmail-mime-display-body new)) | |
186f7f0b | 608 | (forward-char (- (aref segment 4) (aref segment 3))) |
49ae5b39 | 609 | (if (rmail-mime-display-body current) |
186f7f0b | 610 | (delete-char (- (aref segment 4) (aref segment 3)))) |
49ae5b39 | 611 | (if (rmail-mime-display-body new) |
186f7f0b KH |
612 | (rmail-mime-insert-decoded-text entity))) |
613 | (put-text-property beg (point) 'rmail-mime-entity entity))) | |
d1be4ec2 | 614 | |
186f7f0b KH |
615 | (defun rmail-mime-insert-image (entity) |
616 | "Decode and insert the image body of MIME-entity ENTITY." | |
617 | (let* ((content-type (car (rmail-mime-entity-type entity))) | |
618 | (bulk-data (aref (rmail-mime-entity-tagline entity) 1)) | |
619 | (body (rmail-mime-entity-body entity)) | |
620 | data) | |
621 | (if (stringp (aref body 0)) | |
622 | (setq data (aref body 0)) | |
623 | (let ((rmail-mime-mbox-buffer rmail-view-buffer) | |
624 | (transfer-encoding (rmail-mime-entity-transfer-encoding entity))) | |
d1be4ec2 KH |
625 | (with-temp-buffer |
626 | (set-buffer-multibyte nil) | |
627 | (setq buffer-undo-list t) | |
186f7f0b KH |
628 | (insert-buffer-substring rmail-mime-mbox-buffer |
629 | (aref body 0) (aref body 1)) | |
d1be4ec2 KH |
630 | (cond ((string= transfer-encoding "base64") |
631 | (ignore-errors (base64-decode-region (point-min) (point-max)))) | |
632 | ((string= transfer-encoding "quoted-printable") | |
633 | (quoted-printable-decode-region (point-min) (point-max)))) | |
634 | (setq data | |
635 | (buffer-substring-no-properties (point-min) (point-max)))))) | |
186f7f0b KH |
636 | (insert-image (create-image data (cdr bulk-data) t)) |
637 | (insert "\n"))) | |
e8652dd9 | 638 | |
e7ca0062 KH |
639 | (defun rmail-mime-toggle-button (button) |
640 | "Hide or show the body of the MIME-entity associated with BUTTON." | |
186f7f0b | 641 | (save-excursion |
e7ca0062 | 642 | (goto-char (button-start button)) |
186f7f0b | 643 | (rmail-mime-toggle-hidden))) |
e8652dd9 | 644 | |
e7ca0062 | 645 | (define-button-type 'rmail-mime-toggle 'action 'rmail-mime-toggle-button) |
e8652dd9 GM |
646 | |
647 | ||
537ab246 BG |
648 | (defun rmail-mime-bulk-handler (content-type |
649 | content-disposition | |
e8652dd9 | 650 | content-transfer-encoding) |
2e9075d3 | 651 | "Handle the current buffer as an attachment to download. |
e8652dd9 GM |
652 | For images that Emacs is capable of displaying, the behavior |
653 | depends upon the value of `rmail-mime-show-images'." | |
d1be4ec2 KH |
654 | (rmail-mime-insert-bulk |
655 | (rmail-mime-entity content-type content-disposition content-transfer-encoding | |
186f7f0b KH |
656 | (vector (vector nil nil nil) (vector nil t nil)) |
657 | (vector nil nil nil) (vector "" (cons nil nil) t) | |
658 | (vector nil nil nil) nil 'rmail-mime-insert-bulk))) | |
659 | ||
660 | (defun rmail-mime-set-bulk-data (entity) | |
661 | "Setup the information about the attachment object for MIME-entity ENTITY. | |
662 | The value is non-nil if and only if the attachment object should be shown | |
663 | directly." | |
664 | (let ((content-type (car (rmail-mime-entity-type entity))) | |
665 | (size (cdr (assq 'size (cdr (rmail-mime-entity-disposition entity))))) | |
666 | (bulk-data (aref (rmail-mime-entity-tagline entity) 1)) | |
667 | (body (rmail-mime-entity-body entity)) | |
e7ca0062 | 668 | type to-show) |
186f7f0b KH |
669 | (cond (size |
670 | (setq size (string-to-number size))) | |
671 | ((stringp (aref body 0)) | |
672 | (setq size (length (aref body 0)))) | |
673 | (t | |
674 | ;; Rough estimation of the size. | |
675 | (let ((encoding (rmail-mime-entity-transfer-encoding entity))) | |
676 | (setq size (- (aref body 1) (aref body 0))) | |
677 | (cond ((string= encoding "base64") | |
678 | (setq size (/ (* size 3) 4))) | |
679 | ((string= encoding "quoted-printable") | |
680 | (setq size (/ (* size 7) 3))))))) | |
681 | ||
682 | (cond | |
683 | ((string-match "text/" content-type) | |
684 | (setq type 'text)) | |
685 | ((string-match "image/\\(.*\\)" content-type) | |
686 | (setq type (image-type-from-file-name | |
687 | (concat "." (match-string 1 content-type)))) | |
688 | (if (and (memq type image-types) | |
689 | (image-type-available-p type)) | |
690 | (if (and rmail-mime-show-images | |
691 | (not (eq rmail-mime-show-images 'button)) | |
692 | (or (not (numberp rmail-mime-show-images)) | |
693 | (< size rmail-mime-show-images))) | |
694 | (setq to-show t)) | |
695 | (setq type nil)))) | |
696 | (setcar bulk-data size) | |
697 | (setcdr bulk-data type) | |
698 | to-show)) | |
d1be4ec2 KH |
699 | |
700 | (defun rmail-mime-insert-bulk (entity) | |
186f7f0b | 701 | "Presentation handler for an attachment MIME entity." |
d1be4ec2 KH |
702 | (let* ((content-type (rmail-mime-entity-type entity)) |
703 | (content-disposition (rmail-mime-entity-disposition entity)) | |
186f7f0b KH |
704 | (current (aref (rmail-mime-entity-display entity) 0)) |
705 | (new (aref (rmail-mime-entity-display entity) 1)) | |
706 | (header (rmail-mime-entity-header entity)) | |
707 | (tagline (rmail-mime-entity-tagline entity)) | |
708 | (bulk-data (aref tagline 1)) | |
d1be4ec2 | 709 | (body (rmail-mime-entity-body entity)) |
e7ca0062 | 710 | ;; Find the default directory for this media type. |
d1be4ec2 | 711 | (directory (catch 'directory |
537ab246 BG |
712 | (dolist (entry rmail-mime-attachment-dirs-alist) |
713 | (when (string-match (car entry) (car content-type)) | |
714 | (dolist (dir (cdr entry)) | |
715 | (when (file-directory-p dir) | |
716 | (throw 'directory dir))))))) | |
717 | (filename (or (cdr (assq 'name (cdr content-type))) | |
718 | (cdr (assq 'filename (cdr content-disposition))) | |
719 | "noname")) | |
69220882 | 720 | (units '(B kB MB GB)) |
186f7f0b KH |
721 | (segment (rmail-mime-entity-segment (point) entity)) |
722 | beg data size) | |
723 | ||
354cf0ba | 724 | (if (or (integerp (aref body 0)) (markerp (aref body 0))) |
d1be4ec2 | 725 | (setq data entity |
186f7f0b KH |
726 | size (car bulk-data)) |
727 | (if (stringp (aref body 0)) | |
728 | (setq data (aref body 0)) | |
729 | (setq data (string-as-unibyte (buffer-string))) | |
730 | (aset body 0 data) | |
731 | (rmail-mime-set-bulk-data entity) | |
732 | (delete-region (point-min) (point-max))) | |
733 | (setq size (length data))) | |
d1be4ec2 | 734 | (while (and (> size 1024.0) ; cribbed from gnus-agent-expire-done-message |
69220882 GM |
735 | (cdr units)) |
736 | (setq size (/ size 1024.0) | |
737 | units (cdr units))) | |
186f7f0b KH |
738 | |
739 | (setq beg (point)) | |
740 | ||
741 | ;; header | |
49ae5b39 EZ |
742 | (if (eq (rmail-mime-display-header current) |
743 | (rmail-mime-display-header new)) | |
186f7f0b | 744 | (goto-char (aref segment 2)) |
49ae5b39 | 745 | (if (rmail-mime-display-header current) |
186f7f0b | 746 | (delete-char (- (aref segment 2) (aref segment 1)))) |
49ae5b39 | 747 | (if (rmail-mime-display-header new) |
186f7f0b KH |
748 | (rmail-mime-insert-header header))) |
749 | ||
750 | ;; tagline | |
49ae5b39 EZ |
751 | (if (eq (rmail-mime-display-tagline current) |
752 | (rmail-mime-display-tagline new)) | |
753 | (if (or (not (rmail-mime-display-tagline current)) | |
754 | (eq (rmail-mime-display-body current) | |
755 | (rmail-mime-display-body new))) | |
e7ca0062 KH |
756 | (forward-char (- (aref segment 3) (aref segment 2))) |
757 | (rmail-mime-update-tagline entity)) | |
49ae5b39 | 758 | (if (rmail-mime-display-tagline current) |
186f7f0b | 759 | (delete-char (- (aref segment 3) (aref segment 2)))) |
49ae5b39 | 760 | (if (rmail-mime-display-tagline new) |
186f7f0b KH |
761 | (rmail-mime-insert-tagline |
762 | entity | |
e7ca0062 | 763 | " Save:" |
186f7f0b KH |
764 | (list filename |
765 | :type 'rmail-mime-save | |
766 | 'help-echo "mouse-2, RET: Save attachment" | |
767 | 'filename filename | |
768 | 'directory (file-name-as-directory directory) | |
769 | 'data data) | |
770 | (format " (%.0f%s)" size (car units)) | |
e7ca0062 KH |
771 | ;; We don't need this button because the "type" string of a |
772 | ;; tagline is the button to do this. | |
773 | ;; (if (cdr bulk-data) | |
774 | ;; " ") | |
775 | ;; (if (cdr bulk-data) | |
776 | ;; (list "Toggle show/hide" | |
777 | ;; :type 'rmail-mime-image | |
778 | ;; 'help-echo "mouse-2, RET: Toggle show/hide" | |
779 | ;; 'image-type (cdr bulk-data) | |
780 | ;; 'image-data data)) | |
781 | ))) | |
186f7f0b | 782 | ;; body |
49ae5b39 EZ |
783 | (if (eq (rmail-mime-display-body current) |
784 | (rmail-mime-display-body new)) | |
186f7f0b | 785 | (forward-char (- (aref segment 4) (aref segment 3))) |
49ae5b39 | 786 | (if (rmail-mime-display-body current) |
186f7f0b | 787 | (delete-char (- (aref segment 4) (aref segment 3)))) |
49ae5b39 | 788 | (if (rmail-mime-display-body new) |
186f7f0b KH |
789 | (cond ((eq (cdr bulk-data) 'text) |
790 | (rmail-mime-insert-decoded-text entity)) | |
791 | ((cdr bulk-data) | |
362b9d48 GM |
792 | (rmail-mime-insert-image entity)) |
793 | (t | |
794 | ;; As we don't know how to display the body, just | |
795 | ;; insert it as a text. | |
796 | (rmail-mime-insert-decoded-text entity))))) | |
186f7f0b | 797 | (put-text-property beg (point) 'rmail-mime-entity entity))) |
537ab246 | 798 | |
537ab246 BG |
799 | (defun rmail-mime-multipart-handler (content-type |
800 | content-disposition | |
801 | content-transfer-encoding) | |
802 | "Handle the current buffer as a multipart MIME body. | |
803 | The current buffer should be narrowed to the body. CONTENT-TYPE, | |
804 | CONTENT-DISPOSITION, and CONTENT-TRANSFER-ENCODING are the values | |
805 | of the respective parsed headers. See `rmail-mime-handle' for their | |
806 | format." | |
d1be4ec2 | 807 | (rmail-mime-process-multipart |
186f7f0b KH |
808 | content-type content-disposition content-transfer-encoding nil) |
809 | t) | |
d1be4ec2 KH |
810 | |
811 | (defun rmail-mime-process-multipart (content-type | |
812 | content-disposition | |
813 | content-transfer-encoding | |
186f7f0b | 814 | parse-tag) |
d1be4ec2 KH |
815 | "Process the current buffer as a multipart MIME body. |
816 | ||
186f7f0b KH |
817 | If PARSE-TAG is nil, modify the current buffer directly for |
818 | showing the MIME body and return nil. | |
d1be4ec2 | 819 | |
186f7f0b KH |
820 | Otherwise, PARSE-TAG is a string indicating the depth and index |
821 | number of the entity. In this case, parse the current buffer and | |
822 | return a list of MIME-entity objects. | |
d1be4ec2 KH |
823 | |
824 | The other arguments are the same as `rmail-mime-multipart-handler'." | |
537ab246 BG |
825 | ;; Some MUAs start boundaries with "--", while it should start |
826 | ;; with "CRLF--", as defined by RFC 2046: | |
827 | ;; The boundary delimiter MUST occur at the beginning of a line, | |
828 | ;; i.e., following a CRLF, and the initial CRLF is considered to | |
829 | ;; be attached to the boundary delimiter line rather than part | |
830 | ;; of the preceding part. | |
831 | ;; We currently don't handle that. | |
832 | (let ((boundary (cdr (assq 'boundary content-type))) | |
186f7f0b KH |
833 | (subtype (cadr (split-string (car content-type) "/"))) |
834 | (index 0) | |
99a1e701 | 835 | beg end next entities truncated last) |
537ab246 BG |
836 | (unless boundary |
837 | (rmail-mm-get-boundary-error-message | |
838 | "No boundary defined" content-type content-disposition | |
839 | content-transfer-encoding)) | |
840 | (setq boundary (concat "\n--" boundary)) | |
841 | ;; Hide the body before the first bodypart | |
842 | (goto-char (point-min)) | |
843 | (when (and (search-forward boundary nil t) | |
844 | (looking-at "[ \t]*\n")) | |
186f7f0b | 845 | (if parse-tag |
d1be4ec2 KH |
846 | (narrow-to-region (match-end 0) (point-max)) |
847 | (delete-region (point-min) (match-end 0)))) | |
186f7f0b KH |
848 | |
849 | ;; Change content-type to the proper default one for the children. | |
850 | (cond ((string-match "mixed" subtype) | |
851 | (setq content-type '("text/plain"))) | |
852 | ((string-match "digest" subtype) | |
362b9d48 GM |
853 | (setq content-type '("message/rfc822"))) |
854 | (t | |
855 | (setq content-type nil))) | |
186f7f0b | 856 | |
537ab246 BG |
857 | ;; Loop over all body parts, where beg points at the beginning of |
858 | ;; the part and end points at the end of the part. next points at | |
186f7f0b KH |
859 | ;; the beginning of the next part. The current point is just |
860 | ;; after the boundary tag. | |
537ab246 | 861 | (setq beg (point-min)) |
d31fd9ac RS |
862 | |
863 | (while (or (and (search-forward boundary nil t) | |
aa8a705c | 864 | (setq truncated nil end (match-beginning 0))) |
d31fd9ac RS |
865 | ;; If the boundary does not appear at all, |
866 | ;; the message was truncated. | |
867 | ;; Handle the rest of the truncated message | |
868 | ;; (if it isn't empty) by pretending that the boundary | |
869 | ;; appears at the end of the message. | |
99a1e701 GM |
870 | ;; We use `last' to distinguish this from the more |
871 | ;; likely situation of there being an epilogue | |
872 | ;; after the last boundary, which should be ignored. | |
873 | ;; See rmailmm-test-multipart-handler for an example, | |
874 | ;; and also bug#10101. | |
875 | (and (not last) | |
876 | (save-excursion | |
d31fd9ac RS |
877 | (skip-chars-forward "\n") |
878 | (> (point-max) (point))) | |
aa8a705c | 879 | (setq truncated t end (point-max)))) |
537ab246 BG |
880 | ;; If this is the last boundary according to RFC 2046, hide the |
881 | ;; epilogue, else hide the boundary only. Use a marker for | |
882 | ;; `next' because `rmail-mime-show' may change the buffer. | |
ffa1fed6 | 883 | (cond ((looking-at "--[ \t]*$") |
99a1e701 GM |
884 | (setq next (point-max-marker) |
885 | last t)) | |
537ab246 | 886 | ((looking-at "[ \t]*\n") |
ffa1fed6 | 887 | (setq next (copy-marker (match-end 0) t))) |
aa8a705c | 888 | (truncated |
d31fd9ac RS |
889 | ;; We're handling what's left of a truncated message. |
890 | (setq next (point-max-marker))) | |
537ab246 | 891 | (t |
8350f087 | 892 | ;; The original code signaled an error as below, but |
c1449bff KH |
893 | ;; this line may be a boundary of nested multipart. So, |
894 | ;; we just set `next' to nil to skip this line | |
895 | ;; (rmail-mm-get-boundary-error-message | |
896 | ;; "Malformed boundary" content-type content-disposition | |
897 | ;; content-transfer-encoding) | |
898 | (setq next nil))) | |
899 | ||
900 | (when next | |
901 | (setq index (1+ index)) | |
902 | ;; Handle the part. | |
903 | (if parse-tag | |
904 | (save-restriction | |
905 | (narrow-to-region beg end) | |
906 | (let ((child (rmail-mime-process | |
907 | nil (format "%s/%d" parse-tag index) | |
908 | content-type content-disposition))) | |
909 | ;; Display a tagline. | |
910 | (aset (aref (rmail-mime-entity-display child) 1) 1 | |
911 | (aset (rmail-mime-entity-tagline child) 2 t)) | |
aa8a705c | 912 | (rmail-mime-entity-set-truncated child truncated) |
c1449bff KH |
913 | (push child entities))) |
914 | ||
915 | (delete-region end next) | |
d1be4ec2 KH |
916 | (save-restriction |
917 | (narrow-to-region beg end) | |
c1449bff KH |
918 | (rmail-mime-show))) |
919 | (goto-char (setq beg next)))) | |
186f7f0b KH |
920 | |
921 | (when parse-tag | |
922 | (setq entities (nreverse entities)) | |
923 | (if (string-match "alternative" subtype) | |
924 | ;; Find the best entity to show, and hide all the others. | |
925 | (let (best second) | |
926 | (dolist (child entities) | |
927 | (if (string= (or (car (rmail-mime-entity-disposition child)) | |
928 | (car content-disposition)) | |
929 | "inline") | |
930 | (if (string-match "text/plain" | |
931 | (car (rmail-mime-entity-type child))) | |
932 | (setq best child) | |
933 | (if (string-match "text/.*" | |
934 | (car (rmail-mime-entity-type child))) | |
935 | (setq second child))))) | |
936 | (or best (not second) (setq best second)) | |
937 | (dolist (child entities) | |
e7ca0062 KH |
938 | (unless (eq best child) |
939 | (aset (rmail-mime-entity-body child) 2 nil) | |
940 | (rmail-mime-hidden-mode child))))) | |
186f7f0b | 941 | entities))) |
537ab246 | 942 | |
186f7f0b KH |
943 | (defun rmail-mime-insert-multipart (entity) |
944 | "Presentation handler for a multipart MIME entity." | |
945 | (let ((current (aref (rmail-mime-entity-display entity) 0)) | |
946 | (new (aref (rmail-mime-entity-display entity) 1)) | |
947 | (header (rmail-mime-entity-header entity)) | |
948 | (tagline (rmail-mime-entity-tagline entity)) | |
949 | (body (rmail-mime-entity-body entity)) | |
950 | (beg (point)) | |
951 | (segment (rmail-mime-entity-segment (point) entity))) | |
952 | ;; header | |
49ae5b39 EZ |
953 | (if (eq (rmail-mime-display-header current) |
954 | (rmail-mime-display-header new)) | |
186f7f0b | 955 | (goto-char (aref segment 2)) |
49ae5b39 | 956 | (if (rmail-mime-display-header current) |
186f7f0b | 957 | (delete-char (- (aref segment 2) (aref segment 1)))) |
49ae5b39 | 958 | (if (rmail-mime-display-header new) |
186f7f0b KH |
959 | (rmail-mime-insert-header header))) |
960 | ;; tagline | |
49ae5b39 EZ |
961 | (if (eq (rmail-mime-display-tagline current) |
962 | (rmail-mime-display-tagline new)) | |
963 | (if (or (not (rmail-mime-display-tagline current)) | |
964 | (eq (rmail-mime-display-body current) | |
965 | (rmail-mime-display-body new))) | |
e7ca0062 KH |
966 | (forward-char (- (aref segment 3) (aref segment 2))) |
967 | (rmail-mime-update-tagline entity)) | |
49ae5b39 | 968 | (if (rmail-mime-display-tagline current) |
186f7f0b | 969 | (delete-char (- (aref segment 3) (aref segment 2)))) |
49ae5b39 | 970 | (if (rmail-mime-display-tagline new) |
186f7f0b KH |
971 | (rmail-mime-insert-tagline entity))) |
972 | ||
973 | (put-text-property beg (point) 'rmail-mime-entity entity) | |
e7ca0062 | 974 | |
186f7f0b | 975 | ;; body |
49ae5b39 EZ |
976 | (if (eq (rmail-mime-display-body current) |
977 | (rmail-mime-display-body new)) | |
186f7f0b | 978 | (forward-char (- (aref segment 4) (aref segment 3))) |
e7ca0062 KH |
979 | (dolist (child (rmail-mime-entity-children entity)) |
980 | (rmail-mime-insert child))) | |
981 | entity)) | |
186f7f0b | 982 | |
537ab246 BG |
983 | ;;; Main code |
984 | ||
985 | (defun rmail-mime-handle (content-type | |
986 | content-disposition | |
987 | content-transfer-encoding) | |
988 | "Handle the current buffer as a MIME part. | |
989 | The current buffer should be narrowed to the respective body, and | |
990 | point should be at the beginning of the body. | |
991 | ||
992 | CONTENT-TYPE, CONTENT-DISPOSITION, and CONTENT-TRANSFER-ENCODING | |
0c9ff2c5 | 993 | are the values of the respective parsed headers. The latter should |
672b871d | 994 | be lower-case. The parsed headers for CONTENT-TYPE and CONTENT-DISPOSITION |
0c9ff2c5 | 995 | have the form |
537ab246 BG |
996 | |
997 | \(VALUE . ALIST) | |
998 | ||
999 | In other words: | |
1000 | ||
1001 | \(VALUE (ATTRIBUTE . VALUE) (ATTRIBUTE . VALUE) ...) | |
1002 | ||
1003 | VALUE is a string and ATTRIBUTE is a symbol. | |
1004 | ||
1005 | Consider the following header, for example: | |
1006 | ||
1007 | Content-Type: multipart/mixed; | |
1008 | boundary=\"----=_NextPart_000_0104_01C617E4.BDEC4C40\" | |
1009 | ||
1010 | The parsed header value: | |
1011 | ||
1012 | \(\"multipart/mixed\" | |
1013 | \(\"boundary\" . \"----=_NextPart_000_0104_01C617E4.BDEC4C40\"))" | |
1014 | ;; Handle the content transfer encodings we know. Unknown transfer | |
1015 | ;; encodings will be passed on to the various handlers. | |
1016 | (cond ((string= content-transfer-encoding "base64") | |
1017 | (when (ignore-errors | |
1018 | (base64-decode-region (point) (point-max))) | |
1019 | (setq content-transfer-encoding nil))) | |
1020 | ((string= content-transfer-encoding "quoted-printable") | |
1021 | (quoted-printable-decode-region (point) (point-max)) | |
1022 | (setq content-transfer-encoding nil)) | |
1023 | ((string= content-transfer-encoding "8bit") | |
1024 | ;; FIXME: Is this the correct way? | |
c893016b SM |
1025 | ;; No, of course not, it just means there's no decoding to do. |
1026 | ;; (set-buffer-multibyte nil) | |
1027 | (setq content-transfer-encoding nil) | |
1028 | )) | |
537ab246 BG |
1029 | ;; Inline stuff requires work. Attachments are handled by the bulk |
1030 | ;; handler. | |
1031 | (if (string= "inline" (car content-disposition)) | |
1032 | (let ((stop nil)) | |
1033 | (dolist (entry rmail-mime-media-type-handlers-alist) | |
1034 | (when (and (string-match (car entry) (car content-type)) (not stop)) | |
1035 | (progn | |
1036 | (setq stop (funcall (cadr entry) content-type | |
1037 | content-disposition | |
1038 | content-transfer-encoding)))))) | |
1039 | ;; Everything else is an attachment. | |
1040 | (rmail-mime-bulk-handler content-type | |
1041 | content-disposition | |
e7ca0062 KH |
1042 | content-transfer-encoding)) |
1043 | (save-restriction | |
1044 | (widen) | |
1045 | (let ((entity (get-text-property (1- (point)) 'rmail-mime-entity)) | |
1046 | current new) | |
1047 | (when entity | |
1048 | (setq current (aref (rmail-mime-entity-display entity) 0) | |
1049 | new (aref (rmail-mime-entity-display entity) 1)) | |
1050 | (dotimes (i 3) | |
1051 | (aset current i (aref new i))))))) | |
537ab246 BG |
1052 | |
1053 | (defun rmail-mime-show (&optional show-headers) | |
1054 | "Handle the current buffer as a MIME message. | |
1055 | If SHOW-HEADERS is non-nil, then the headers of the current part | |
1056 | will shown as usual for a MIME message. The headers are also | |
1057 | shown for the content type message/rfc822. This function will be | |
1058 | called recursively if multiple parts are available. | |
1059 | ||
1060 | The current buffer must contain a single message. It will be | |
1061 | modified." | |
d1be4ec2 KH |
1062 | (rmail-mime-process show-headers nil)) |
1063 | ||
186f7f0b KH |
1064 | (defun rmail-mime-process (show-headers parse-tag &optional |
1065 | default-content-type | |
1066 | default-content-disposition) | |
537ab246 BG |
1067 | (let ((end (point-min)) |
1068 | content-type | |
1069 | content-transfer-encoding | |
1070 | content-disposition) | |
1071 | ;; `point-min' returns the beginning and `end' points at the end | |
1072 | ;; of the headers. | |
1073 | (goto-char (point-min)) | |
1074 | ;; If we're showing a part without headers, then it will start | |
1075 | ;; with a newline. | |
1076 | (if (eq (char-after) ?\n) | |
1077 | (setq end (1+ (point))) | |
1078 | (when (search-forward "\n\n" nil t) | |
1079 | (setq end (match-end 0)) | |
1080 | (save-restriction | |
1081 | (narrow-to-region (point-min) end) | |
1082 | ;; FIXME: Default disposition of the multipart entities should | |
1083 | ;; be inherited. | |
1084 | (setq content-type | |
1085 | (mail-fetch-field "Content-Type") | |
1086 | content-transfer-encoding | |
1087 | (mail-fetch-field "Content-Transfer-Encoding") | |
1088 | content-disposition | |
1089 | (mail-fetch-field "Content-Disposition"))))) | |
0c9ff2c5 GM |
1090 | ;; Per RFC 2045, C-T-E is case insensitive (bug#5070), but the others |
1091 | ;; are not completely so. Hopefully mail-header-parse-* DTRT. | |
1092 | (if content-transfer-encoding | |
1093 | (setq content-transfer-encoding (downcase content-transfer-encoding))) | |
1094 | (setq content-type | |
1095 | (if content-type | |
e7ca0062 KH |
1096 | (or (mail-header-parse-content-type content-type) |
1097 | '("text/plain")) | |
186f7f0b | 1098 | (or default-content-type '("text/plain")))) |
537ab246 BG |
1099 | (setq content-disposition |
1100 | (if content-disposition | |
1101 | (mail-header-parse-content-disposition content-disposition) | |
1102 | ;; If none specified, we are free to choose what we deem | |
1103 | ;; suitable according to RFC 2183. We like inline. | |
186f7f0b | 1104 | (or default-content-disposition '("inline")))) |
537ab246 BG |
1105 | ;; Unrecognized disposition types are to be treated like |
1106 | ;; attachment according to RFC 2183. | |
1107 | (unless (member (car content-disposition) '("inline" "attachment")) | |
1108 | (setq content-disposition '("attachment"))) | |
d1be4ec2 | 1109 | |
186f7f0b KH |
1110 | (if parse-tag |
1111 | (let* ((is-inline (string= (car content-disposition) "inline")) | |
354cf0ba RS |
1112 | (hdr-end (copy-marker end)) |
1113 | (header (vector (point-min-marker) hdr-end nil)) | |
186f7f0b | 1114 | (tagline (vector parse-tag (cons nil nil) t)) |
354cf0ba | 1115 | (body (vector hdr-end (point-max-marker) is-inline)) |
186f7f0b KH |
1116 | (new (vector (aref header 2) (aref tagline 2) (aref body 2))) |
1117 | children handler entity) | |
1118 | (cond ((string-match "multipart/.*" (car content-type)) | |
1119 | (save-restriction | |
1120 | (narrow-to-region (1- end) (point-max)) | |
1121 | (setq children (rmail-mime-process-multipart | |
1122 | content-type | |
1123 | content-disposition | |
1124 | content-transfer-encoding | |
1125 | parse-tag) | |
1126 | handler 'rmail-mime-insert-multipart))) | |
1127 | ((string-match "message/rfc822" (car content-type)) | |
1128 | (save-restriction | |
d1be4ec2 | 1129 | (narrow-to-region end (point-max)) |
186f7f0b KH |
1130 | (let* ((msg (rmail-mime-process t parse-tag |
1131 | '("text/plain") '("inline"))) | |
1132 | (msg-new (aref (rmail-mime-entity-display msg) 1))) | |
1133 | ;; Show header of the child. | |
1134 | (aset msg-new 0 t) | |
1135 | (aset (rmail-mime-entity-header msg) 2 t) | |
1136 | ;; Hide tagline of the child. | |
1137 | (aset msg-new 1 nil) | |
1138 | (aset (rmail-mime-entity-tagline msg) 2 nil) | |
1139 | (setq children (list msg) | |
1140 | handler 'rmail-mime-insert-multipart)))) | |
1141 | ((and is-inline (string-match "text/" (car content-type))) | |
1142 | ;; Don't need a tagline. | |
1143 | (aset new 1 (aset tagline 2 nil)) | |
1144 | (setq handler 'rmail-mime-insert-text)) | |
1145 | (t | |
1146 | ;; Force hidden mode. | |
1147 | (aset new 1 (aset tagline 2 t)) | |
1148 | (aset new 2 (aset body 2 nil)) | |
1149 | (setq handler 'rmail-mime-insert-bulk))) | |
1150 | (setq entity (rmail-mime-entity content-type | |
1151 | content-disposition | |
1152 | content-transfer-encoding | |
1153 | (vector (vector nil nil nil) new) | |
1154 | header tagline body children handler)) | |
1155 | (if (and (eq handler 'rmail-mime-insert-bulk) | |
1156 | (rmail-mime-set-bulk-data entity)) | |
1157 | ;; Show the body. | |
1158 | (aset new 2 (aset body 2 t))) | |
1159 | entity) | |
1160 | ||
d1be4ec2 | 1161 | ;; Hide headers and handle the part. |
186f7f0b | 1162 | (put-text-property (point-min) (point-max) 'rmail-mime-entity |
7c420169 | 1163 | (rmail-mime-entity |
354cf0ba RS |
1164 | content-type content-disposition |
1165 | content-transfer-encoding | |
1166 | (vector (vector 'raw nil 'raw) (vector 'raw nil 'raw)) | |
1167 | (vector nil nil 'raw) (vector "" (cons nil nil) nil) | |
1168 | (vector nil nil 'raw) nil nil)) | |
d1be4ec2 KH |
1169 | (save-restriction |
1170 | (cond ((string= (car content-type) "message/rfc822") | |
1171 | (narrow-to-region end (point-max))) | |
1172 | ((not show-headers) | |
1173 | (delete-region (point-min) end))) | |
1174 | (rmail-mime-handle content-type content-disposition | |
1175 | content-transfer-encoding))))) | |
1176 | ||
d1be4ec2 KH |
1177 | (defun rmail-mime-parse () |
1178 | "Parse the current Rmail message as a MIME message. | |
672b871d | 1179 | The value is a MIME-entity object (see `rmail-mime-entity'). |
8258ae3f | 1180 | If an error occurs, return an error message string." |
186f7f0b KH |
1181 | (let ((rmail-mime-mbox-buffer (if (rmail-buffers-swapped-p) |
1182 | rmail-view-buffer | |
1183 | (current-buffer)))) | |
8258ae3f | 1184 | (condition-case err |
186f7f0b KH |
1185 | (with-current-buffer rmail-mime-mbox-buffer |
1186 | (save-excursion | |
1187 | (goto-char (point-min)) | |
1188 | (let* ((entity (rmail-mime-process t "" | |
1189 | '("text/plain") '("inline"))) | |
1190 | (new (aref (rmail-mime-entity-display entity) 1))) | |
1191 | ;; Show header. | |
1192 | (aset new 0 (aset (rmail-mime-entity-header entity) 2 t)) | |
1193 | ;; Show tagline if and only if body is not shown. | |
1194 | (if (aref new 2) | |
1195 | (aset new 1 (aset (rmail-mime-entity-tagline entity) 2 nil)) | |
1196 | (aset new 1 (aset (rmail-mime-entity-tagline entity) 2 t))) | |
1197 | entity))) | |
8258ae3f | 1198 | (error (format "%s" err))))) |
186f7f0b KH |
1199 | |
1200 | (defun rmail-mime-insert (entity) | |
d1be4ec2 KH |
1201 | "Insert a MIME-entity ENTITY in the current buffer. |
1202 | ||
1203 | This function will be called recursively if multiple parts are | |
1204 | available." | |
186f7f0b KH |
1205 | (let ((current (aref (rmail-mime-entity-display entity) 0)) |
1206 | (new (aref (rmail-mime-entity-display entity) 1))) | |
49ae5b39 | 1207 | (if (not (eq (rmail-mime-display-header new) 'raw)) |
186f7f0b KH |
1208 | ;; Not a raw-mode. Each handler should handle it. |
1209 | (funcall (rmail-mime-entity-handler entity) entity) | |
1210 | (let ((header (rmail-mime-entity-header entity)) | |
1211 | (tagline (rmail-mime-entity-tagline entity)) | |
1212 | (body (rmail-mime-entity-body entity)) | |
1213 | (beg (point)) | |
1214 | (segment (rmail-mime-entity-segment (point) entity))) | |
1215 | ;; header | |
49ae5b39 EZ |
1216 | (if (eq (rmail-mime-display-header current) |
1217 | (rmail-mime-display-header new)) | |
186f7f0b | 1218 | (goto-char (aref segment 2)) |
49ae5b39 | 1219 | (if (rmail-mime-display-header current) |
186f7f0b KH |
1220 | (delete-char (- (aref segment 2) (aref segment 1)))) |
1221 | (insert-buffer-substring rmail-mime-mbox-buffer | |
0dee970c | 1222 | (aref header 0) (aref header 1))) |
186f7f0b | 1223 | ;; tagline |
49ae5b39 | 1224 | (if (rmail-mime-display-tagline current) |
186f7f0b KH |
1225 | (delete-char (- (aref segment 3) (aref segment 2)))) |
1226 | ;; body | |
e7ca0062 KH |
1227 | (let ((children (rmail-mime-entity-children entity))) |
1228 | (if children | |
1229 | (progn | |
1230 | (put-text-property beg (point) 'rmail-mime-entity entity) | |
1231 | (dolist (child children) | |
1232 | (rmail-mime-insert child))) | |
49ae5b39 EZ |
1233 | (if (eq (rmail-mime-display-body current) |
1234 | (rmail-mime-display-body new)) | |
e7ca0062 | 1235 | (forward-char (- (aref segment 4) (aref segment 3))) |
49ae5b39 | 1236 | (if (rmail-mime-display-body current) |
e7ca0062 KH |
1237 | (delete-char (- (aref segment 4) (aref segment 3)))) |
1238 | (insert-buffer-substring rmail-mime-mbox-buffer | |
1239 | (aref body 0) (aref body 1)) | |
1240 | (or (bolp) (insert "\n"))) | |
1241 | (put-text-property beg (point) 'rmail-mime-entity entity))))) | |
186f7f0b KH |
1242 | (dotimes (i 3) |
1243 | (aset current i (aref new i))))) | |
537ab246 | 1244 | |
2e9075d3 GM |
1245 | (define-derived-mode rmail-mime-mode fundamental-mode "RMIME" |
1246 | "Major mode used in `rmail-mime' buffers." | |
1247 | (setq font-lock-defaults '(rmail-font-lock-keywords t t nil nil))) | |
1248 | ||
73422054 | 1249 | ;;;###autoload |
d20faa20 GM |
1250 | (defun rmail-mime (&optional arg state) |
1251 | "Toggle the display of a MIME message. | |
186f7f0b | 1252 | |
672b871d | 1253 | The actual behavior depends on the value of `rmail-enable-mime'. |
186f7f0b | 1254 | |
d20faa20 GM |
1255 | If `rmail-enable-mime' is non-nil (the default), this command toggles |
1256 | the display of a MIME message between decoded presentation form and | |
1257 | raw data. With optional prefix argument ARG, it toggles the display only | |
1258 | of the MIME entity at point, if there is one. The optional argument | |
1259 | STATE forces a particular display state, rather than toggling. | |
1260 | `raw' forces raw mode, any other non-nil value forces decoded mode. | |
1261 | ||
1262 | If `rmail-enable-mime' is nil, this creates a temporary \"*RMAIL*\" | |
1263 | buffer holding a decoded copy of the message. Inline content-types are | |
1264 | handled according to `rmail-mime-media-type-handlers-alist'. | |
1265 | By default, this displays text and multipart messages, and offers to | |
1266 | download attachments as specified by `rmail-mime-attachment-dirs-alist'. | |
1267 | The arguments ARG and STATE have no effect in this case." | |
1268 | (interactive (list current-prefix-arg nil)) | |
186f7f0b | 1269 | (if rmail-enable-mime |
e7ca0062 | 1270 | (with-current-buffer rmail-buffer |
0dee970c RS |
1271 | (if (or (rmail-mime-message-p) |
1272 | (get-text-property (point-min) 'rmail-mime-hidden)) | |
1273 | (let* ((hidden (get-text-property (point-min) 'rmail-mime-hidden)) | |
1274 | (desired-hidden (if state (eq state 'raw) (not hidden)))) | |
1275 | (unless (eq hidden desired-hidden) | |
1276 | (if (not desired-hidden) | |
1277 | (rmail-show-message rmail-current-message) | |
1278 | (let ((rmail-enable-mime nil) | |
1279 | (inhibit-read-only t)) | |
1280 | (rmail-show-message rmail-current-message) | |
1281 | (add-text-properties (point-min) (point-max) '(rmail-mime-hidden t)))))) | |
c0bc0fd4 GM |
1282 | (message "Not a MIME message, just toggling headers") |
1283 | (rmail-toggle-header))) | |
186f7f0b KH |
1284 | (let* ((data (rmail-apply-in-message rmail-current-message 'buffer-string)) |
1285 | (buf (get-buffer-create "*RMAIL*")) | |
1286 | (rmail-mime-mbox-buffer rmail-view-buffer) | |
1287 | (rmail-mime-view-buffer buf)) | |
1288 | (set-buffer buf) | |
1289 | (setq buffer-undo-list t) | |
1290 | (let ((inhibit-read-only t)) | |
1291 | ;; Decoding the message in fundamental mode for speed, only | |
1292 | ;; switching to rmail-mime-mode at the end for display. Eg | |
1293 | ;; quoted-printable-decode-region gets very slow otherwise (Bug#4993). | |
1294 | (fundamental-mode) | |
1295 | (erase-buffer) | |
1296 | (insert data) | |
1297 | (rmail-mime-show t) | |
1298 | (rmail-mime-mode) | |
1299 | (set-buffer-modified-p nil)) | |
1300 | (view-buffer buf)))) | |
537ab246 BG |
1301 | |
1302 | (defun rmail-mm-get-boundary-error-message (message type disposition encoding) | |
672b871d | 1303 | "Return MESSAGE with more information on the main MIME components." |
537ab246 BG |
1304 | (error "%s; type: %s; disposition: %s; encoding: %s" |
1305 | message type disposition encoding)) | |
1306 | ||
d1be4ec2 | 1307 | (defun rmail-show-mime () |
45261b50 | 1308 | "Function to use for the value of `rmail-show-mime-function'." |
186f7f0b KH |
1309 | (let ((entity (rmail-mime-parse)) |
1310 | (rmail-mime-mbox-buffer rmail-buffer) | |
1311 | (rmail-mime-view-buffer rmail-view-buffer) | |
1312 | (rmail-mime-coding-system nil)) | |
2e51d4b5 | 1313 | ;; If ENTITY is not a vector, it is a string describing an error. |
8258ae3f | 1314 | (if (vectorp entity) |
186f7f0b KH |
1315 | (with-current-buffer rmail-mime-view-buffer |
1316 | (erase-buffer) | |
2e51d4b5 KH |
1317 | ;; This condition-case is for catching an error in the |
1318 | ;; internal MIME decoding (e.g. incorrect BASE64 form) that | |
1319 | ;; may be signaled by rmail-mime-insert. | |
1320 | ;; FIXME: The current code doesn't set a proper error symbol | |
1321 | ;; in ERR. We must find a way to propagate a correct error | |
1322 | ;; symbol that is caused in the very deep code of text | |
1323 | ;; decoding (e.g. an error by base64-decode-region called by | |
1324 | ;; post-read-conversion function of utf-7). | |
1325 | (condition-case err | |
1326 | (progn | |
1327 | (rmail-mime-insert entity) | |
1328 | (if (consp rmail-mime-coding-system) | |
1329 | ;; Decoding is done by rfc2047-decode-region only for a | |
1330 | ;; header. But, as the used coding system may have been | |
1331 | ;; overridden by mm-charset-override-alist, we can't | |
1332 | ;; trust (car rmail-mime-coding-system). So, here we | |
1333 | ;; try the decoding again with mm-charset-override-alist | |
1334 | ;; bound to nil. | |
1335 | (let ((mm-charset-override-alist nil)) | |
1336 | (setq rmail-mime-coding-system | |
1337 | (rmail-mime-find-header-encoding | |
1338 | (rmail-mime-entity-header entity))))) | |
1339 | (set-buffer-file-coding-system | |
1340 | (if rmail-mime-coding-system | |
1341 | (coding-system-base rmail-mime-coding-system) | |
1342 | 'undecided) | |
1343 | t t)) | |
1344 | (error (setq entity (format "%s" err)))))) | |
1345 | ;; Re-check ENTITY. It may be set to an error string. | |
1346 | (when (stringp entity) | |
8258ae3f KH |
1347 | ;; Decoding failed. ENTITY is an error message. Insert the |
1348 | ;; original message body as is, and show warning. | |
186f7f0b | 1349 | (let ((region (with-current-buffer rmail-mime-mbox-buffer |
7e116860 KH |
1350 | (goto-char (point-min)) |
1351 | (re-search-forward "^$" nil t) | |
1352 | (forward-line 1) | |
8258ae3f | 1353 | (vector (point-min) (point) (point-max))))) |
186f7f0b | 1354 | (with-current-buffer rmail-mime-view-buffer |
7e116860 KH |
1355 | (let ((inhibit-read-only t)) |
1356 | (erase-buffer) | |
8258ae3f | 1357 | (rmail-mime-insert-header region) |
186f7f0b | 1358 | (insert-buffer-substring rmail-mime-mbox-buffer |
8258ae3f | 1359 | (aref region 1) (aref region 2)))) |
186f7f0b | 1360 | (set-buffer-file-coding-system 'no-conversion t t) |
8258ae3f | 1361 | (message "MIME decoding failed: %s" entity))))) |
d1be4ec2 KH |
1362 | |
1363 | (setq rmail-show-mime-function 'rmail-show-mime) | |
1364 | ||
1365 | (defun rmail-insert-mime-forwarded-message (forward-buffer) | |
7a70468f RS |
1366 | "Insert the message in FORWARD-BUFFER as a forwarded message. |
1367 | This is the usual value of `rmail-insert-mime-forwarded-message-function'." | |
1368 | (let ((message-buffer | |
1369 | (with-current-buffer forward-buffer | |
1370 | (if rmail-buffer-swapped | |
bb709253 ML |
1371 | rmail-view-buffer |
1372 | forward-buffer)))) | |
d1be4ec2 KH |
1373 | (save-restriction |
1374 | (narrow-to-region (point) (point)) | |
7a70468f | 1375 | (message-forward-make-body-mime message-buffer)))) |
d1be4ec2 KH |
1376 | |
1377 | (setq rmail-insert-mime-forwarded-message-function | |
1378 | 'rmail-insert-mime-forwarded-message) | |
1379 | ||
1380 | (defun rmail-insert-mime-resent-message (forward-buffer) | |
7e116860 | 1381 | "Function to set in `rmail-insert-mime-resent-message-function' (which see)." |
d1be4ec2 KH |
1382 | (insert-buffer-substring |
1383 | (with-current-buffer forward-buffer rmail-view-buffer)) | |
1384 | (goto-char (point-min)) | |
1385 | (when (looking-at "From ") | |
1386 | (forward-line 1) | |
1387 | (delete-region (point-min) (point)))) | |
1388 | ||
1389 | (setq rmail-insert-mime-resent-message-function | |
1390 | 'rmail-insert-mime-resent-message) | |
1391 | ||
7e116860 KH |
1392 | (defun rmail-search-mime-message (msg regexp) |
1393 | "Function to set in `rmail-search-mime-message-function' (which see)." | |
1394 | (save-restriction | |
1395 | (narrow-to-region (rmail-msgbeg msg) (rmail-msgend msg)) | |
186f7f0b KH |
1396 | (let* ((rmail-mime-mbox-buffer (current-buffer)) |
1397 | (rmail-mime-view-buffer rmail-view-buffer) | |
1398 | (header-end (save-excursion | |
1399 | (re-search-forward "^$" nil 'move) (point))) | |
1400 | (body-end (point-max)) | |
1401 | (entity (rmail-mime-parse))) | |
7c420169 | 1402 | (or |
7e116860 KH |
1403 | ;; At first, just search the headers. |
1404 | (with-temp-buffer | |
186f7f0b | 1405 | (insert-buffer-substring rmail-mime-mbox-buffer nil header-end) |
7e116860 KH |
1406 | (rfc2047-decode-region (point-min) (point)) |
1407 | (goto-char (point-min)) | |
1408 | (re-search-forward regexp nil t)) | |
1409 | ;; Next, search the body. | |
1410 | (if (and entity | |
a9a936b9 RS |
1411 | ;; RMS: I am not sure why, but sometimes this is a string. |
1412 | (not (stringp entity)) | |
7e116860 KH |
1413 | (let* ((content-type (rmail-mime-entity-type entity)) |
1414 | (charset (cdr (assq 'charset (cdr content-type))))) | |
7c420169 | 1415 | (or (not (string-match "text/.*" (car content-type))) |
7e116860 KH |
1416 | (and charset |
1417 | (not (string= (downcase charset) "us-ascii")))))) | |
1418 | ;; Search the decoded MIME message. | |
1419 | (with-temp-buffer | |
186f7f0b | 1420 | (rmail-mime-insert entity) |
7e116860 KH |
1421 | (goto-char (point-min)) |
1422 | (re-search-forward regexp nil t)) | |
1423 | ;; Search the body without decoding. | |
1424 | (goto-char header-end) | |
1425 | (re-search-forward regexp nil t)))))) | |
1426 | ||
1427 | (setq rmail-search-mime-message-function 'rmail-search-mime-message) | |
1428 | ||
537ab246 BG |
1429 | (provide 'rmailmm) |
1430 | ||
35426db4 GM |
1431 | ;; Local Variables: |
1432 | ;; generated-autoload-file: "rmail.el" | |
1433 | ;; End: | |
1434 | ||
537ab246 | 1435 | ;;; rmailmm.el ends here |