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7426b4f7 | 1 | ;;; gnus-html.el --- Render HTML in a buffer. |
655efd71 | 2 | |
ba318903 | 3 | ;; Copyright (C) 2010-2014 Free Software Foundation, Inc. |
655efd71 KY |
4 | |
5 | ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org> | |
6 | ;; Keywords: html, web | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
12 | ;; the Free Software Foundation, either version 3 of the License, or | |
13 | ;; (at your option) any later version. | |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
22 | ||
23 | ;;; Commentary: | |
24 | ||
25 | ;; The idea is to provide a simple, fast and pretty minimal way to | |
26 | ;; render HTML (including links and images) in a buffer, based on an | |
27 | ;; external HTML renderer (i.e., w3m). | |
28 | ||
29 | ;;; Code: | |
30 | ||
2d217ead | 31 | (eval-when-compile (require 'cl)) |
eca7d7bf RF |
32 | |
33 | (require 'gnus-art) | |
cb48fe81 GM |
34 | (eval-when-compile (require 'mm-decode)) |
35 | ||
14721afc | 36 | (require 'mm-url) |
286c4fc2 | 37 | (require 'url) |
2c8b2fc8 | 38 | (require 'url-cache) |
b4e64499 | 39 | (require 'xml) |
b069e5a6 | 40 | (require 'browse-url) |
ae97e645 | 41 | (require 'mm-util) |
9c619400 | 42 | (eval-and-compile (unless (featurep 'xemacs) (require 'help-fns))) |
14721afc | 43 | |
2c8b2fc8 | 44 | (defcustom gnus-html-image-cache-ttl (days-to-time 7) |
b069e5a6 | 45 | "Time used to determine if we should use images from the cache." |
b0e30310 | 46 | :version "24.1" |
b1992461 | 47 | :group 'gnus-art |
a931698a GM |
48 | ;; FIXME hardly the friendliest type. The allowed value is actually |
49 | ;; any time value, but we are assuming no-one cares about USEC and | |
50 | ;; PSEC here. It would be better to eg make it a number of minutes. | |
51 | :type '(list integer integer)) | |
b1992461 | 52 | |
b069e5a6 G |
53 | (defcustom gnus-html-image-automatic-caching t |
54 | "Whether automatically cache retrieve images." | |
55 | :version "24.1" | |
56 | :group 'gnus-art | |
57 | :type 'boolean) | |
58 | ||
b1992461 KY |
59 | (defcustom gnus-html-frame-width 70 |
60 | "What width to use when rendering HTML." | |
b0e30310 | 61 | :version "24.1" |
b1992461 KY |
62 | :group 'gnus-art |
63 | :type 'integer) | |
64 | ||
239952b0 | 65 | (defcustom gnus-max-image-proportion 0.9 |
7d7520b9 LMI |
66 | "How big pictures displayed are in relation to the window they're in. |
67 | A value of 0.7 means that they are allowed to take up 70% of the | |
68 | width and height of the window. If they are larger than this, | |
69 | and Emacs supports it, then the images will be rescaled down to | |
70 | fit these criteria." | |
71 | :version "24.1" | |
72 | :group 'gnus-art | |
73 | :type 'float) | |
74 | ||
10e91ca9 LMI |
75 | (defvar gnus-html-image-map |
76 | (let ((map (make-sparse-keymap))) | |
77 | (define-key map "u" 'gnus-article-copy-string) | |
78 | (define-key map "i" 'gnus-html-insert-image) | |
2c8b2fc8 | 79 | (define-key map "v" 'gnus-html-browse-url) |
10e91ca9 LMI |
80 | map)) |
81 | ||
99fcd180 LMI |
82 | (defvar gnus-html-displayed-image-map |
83 | (let ((map (make-sparse-keymap))) | |
84 | (define-key map "a" 'gnus-html-show-alt-text) | |
85 | (define-key map "i" 'gnus-html-browse-image) | |
9778a07a LMI |
86 | (define-key map "\r" 'gnus-html-browse-url) |
87 | (define-key map "u" 'gnus-article-copy-string) | |
88 | (define-key map [tab] 'widget-forward) | |
99fcd180 LMI |
89 | map)) |
90 | ||
d3361e62 KY |
91 | (eval-and-compile |
92 | (defalias 'gnus-html-encode-url-chars | |
93 | (if (fboundp 'browse-url-url-encode-chars) | |
94 | 'browse-url-url-encode-chars | |
95 | (lambda (text chars) | |
96 | "URL-encode the chars in TEXT that match CHARS. | |
97 | CHARS is a regexp-like character alternative (e.g., \"[)$]\")." | |
98 | (let ((encoded-text (copy-sequence text)) | |
99 | (s 0)) | |
100 | (while (setq s (string-match chars encoded-text s)) | |
101 | (setq encoded-text | |
102 | (replace-match (format "%%%x" | |
103 | (string-to-char | |
104 | (match-string 0 encoded-text))) | |
105 | t t encoded-text) | |
106 | s (1+ s))) | |
a41c2e6d | 107 | encoded-text))))) |
d3361e62 | 108 | |
b069e5a6 G |
109 | (defun gnus-html-encode-url (url) |
110 | "Encode URL." | |
d3361e62 | 111 | (gnus-html-encode-url-chars url "[)$ ]")) |
b069e5a6 | 112 | |
2c8b2fc8 JD |
113 | (defun gnus-html-cache-expired (url ttl) |
114 | "Check if URL is cached for more than TTL." | |
115 | (cond (url-standalone-mode | |
116 | (not (file-exists-p (url-cache-create-filename url)))) | |
117 | (t (let ((cache-time (url-is-cached url))) | |
118 | (if cache-time | |
119 | (time-less-p | |
120 | (time-add | |
121 | cache-time | |
122 | ttl) | |
123 | (current-time)) | |
124 | t))))) | |
125 | ||
655efd71 | 126 | ;;;###autoload |
29cd986b | 127 | (defun gnus-article-html (&optional handle) |
655efd71 | 128 | (let ((article-buffer (current-buffer))) |
29cd986b LMI |
129 | (unless handle |
130 | (setq handle (mm-dissect-buffer t))) | |
655efd71 KY |
131 | (save-restriction |
132 | (narrow-to-region (point) (point)) | |
133 | (save-excursion | |
b1992461 KY |
134 | (mm-with-part handle |
135 | (let* ((coding-system-for-read 'utf-8) | |
136 | (coding-system-for-write 'utf-8) | |
137 | (default-process-coding-system | |
da43765d KY |
138 | (cons coding-system-for-read coding-system-for-write)) |
139 | (charset (mail-content-type-get (mm-handle-type handle) | |
140 | 'charset))) | |
141 | (when (and charset | |
07178229 KY |
142 | (setq charset (mm-charset-to-coding-system |
143 | charset nil t)) | |
da43765d | 144 | (not (eq charset 'ascii))) |
60893e6f KY |
145 | (insert (prog1 |
146 | (mm-decode-coding-string (buffer-string) charset) | |
147 | (erase-buffer) | |
148 | (mm-enable-multibyte)))) | |
b1992461 | 149 | (call-process-region (point-min) (point-max) |
c9fc72fa | 150 | "w3m" |
b1992461 KY |
151 | nil article-buffer nil |
152 | "-halfdump" | |
153 | "-no-cookie" | |
379dde03 | 154 | "-I" "UTF-8" |
b1992461 KY |
155 | "-O" "UTF-8" |
156 | "-o" "ext_halfdump=1" | |
bdaa75c7 | 157 | "-o" "display_ins_del=2" |
379dde03 | 158 | "-o" "pre_conv=1" |
b1992461 KY |
159 | "-t" (format "%s" tab-width) |
160 | "-cols" (format "%s" gnus-html-frame-width) | |
a93b858c | 161 | "-o" "display_image=on" |
b1992461 | 162 | "-T" "text/html")))) |
655efd71 KY |
163 | (gnus-html-wash-tags)))) |
164 | ||
2d217ead SM |
165 | (defvar gnus-article-mouse-face) |
166 | ||
9778a07a LMI |
167 | (defun gnus-html-pre-wash () |
168 | (goto-char (point-min)) | |
169 | (while (re-search-forward " *<pre_int> *</pre_int> *\n" nil t) | |
170 | (replace-match "" t t)) | |
171 | (goto-char (point-min)) | |
172 | (while (re-search-forward "<a name[^\n>]+>" nil t) | |
173 | (replace-match "" t t))) | |
174 | ||
698ecd82 | 175 | (defun gnus-html-wash-images () |
2c8b2fc8 | 176 | "Run through current buffer and replace img tags by images." |
b59a9eef KY |
177 | (let (tag parameters string start end images url alt-text |
178 | inhibit-images blocked-images) | |
179 | (if (buffer-live-p gnus-summary-buffer) | |
180 | (with-current-buffer gnus-summary-buffer | |
181 | (setq inhibit-images gnus-inhibit-images | |
182 | blocked-images (gnus-blocked-images))) | |
183 | (setq inhibit-images gnus-inhibit-images | |
184 | blocked-images (gnus-blocked-images))) | |
655efd71 | 185 | (goto-char (point-min)) |
9778a07a LMI |
186 | ;; Search for all the images first. |
187 | (while (re-search-forward "<img_alt \\([^>]*\\)>" nil t) | |
188 | (setq parameters (match-string 1) | |
189 | start (match-beginning 0)) | |
190 | (delete-region start (point)) | |
191 | (when (search-forward "</img_alt>" (line-end-position) t) | |
192 | (delete-region (match-beginning 0) (match-end 0))) | |
193 | (setq end (point)) | |
194 | (when (string-match "src=\"\\([^\"]+\\)" parameters) | |
9778a07a | 195 | (gnus-message 8 "gnus-html-wash-tags: fetching image URL %s" url) |
6568a67d KY |
196 | (setq url (gnus-html-encode-url (match-string 1 parameters)) |
197 | alt-text (when (string-match "\\(alt\\|title\\)=\"\\([^\"]+\\)" | |
198 | parameters) | |
199 | (xml-substitute-special (match-string 2 parameters)))) | |
200 | (gnus-add-text-properties | |
201 | start end | |
202 | (list 'image-url url | |
203 | 'image-displayer `(lambda (url start end) | |
204 | (gnus-html-display-image url start end | |
205 | ,alt-text)) | |
206 | 'gnus-image (list url start end alt-text))) | |
04db63bc G |
207 | (widget-convert-button |
208 | 'url-link start (point) | |
209 | :help-echo alt-text | |
210 | :keymap gnus-html-image-map | |
211 | url) | |
6568a67d | 212 | (if (string-match "\\`cid:" url) |
9778a07a LMI |
213 | ;; URLs with cid: have their content stashed in other |
214 | ;; parts of the MIME structure, so just insert them | |
215 | ;; immediately. | |
6568a67d KY |
216 | (let* ((handle (mm-get-content-id (substring url (match-end 0)))) |
217 | (image (when (and handle | |
b59a9eef | 218 | (not inhibit-images)) |
6568a67d | 219 | (gnus-create-image |
0073e031 LMI |
220 | (mm-with-part handle (buffer-string)) |
221 | nil t)))) | |
6568a67d | 222 | (if image |
b9bdaf74 KY |
223 | (gnus-add-image |
224 | 'cid | |
225 | (gnus-put-image | |
226 | (gnus-rescale-image | |
227 | image (gnus-html-maximum-image-size)) | |
228 | (gnus-string-or (prog1 | |
229 | (buffer-substring start end) | |
230 | (delete-region start end)) | |
231 | "*") | |
232 | 'cid)) | |
6568a67d KY |
233 | (widget-convert-button |
234 | 'link start end | |
235 | :action 'gnus-html-insert-image | |
236 | :help-echo url | |
237 | :keymap gnus-html-image-map | |
238 | :button-keymap gnus-html-image-map))) | |
9778a07a | 239 | ;; Normal, external URL. |
b59a9eef KY |
240 | (if (or inhibit-images |
241 | (gnus-html-image-url-blocked-p url blocked-images)) | |
6568a67d KY |
242 | (widget-convert-button |
243 | 'link start end | |
244 | :action 'gnus-html-insert-image | |
245 | :help-echo url | |
246 | :keymap gnus-html-image-map | |
247 | :button-keymap gnus-html-image-map) | |
248 | ;; Non-blocked url | |
249 | (let ((width | |
250 | (when (string-match "width=\"?\\([0-9]+\\)" parameters) | |
251 | (string-to-number (match-string 1 parameters)))) | |
252 | (height | |
253 | (when (string-match "height=\"?\\([0-9]+\\)" parameters) | |
254 | (string-to-number (match-string 1 parameters))))) | |
255 | ;; Don't fetch images that are really small. They're | |
256 | ;; probably tracking pictures. | |
257 | (when (and (or (null height) | |
258 | (> height 4)) | |
259 | (or (null width) | |
260 | (> width 4))) | |
261 | (gnus-html-display-image url start end alt-text))))))))) | |
2c8b2fc8 | 262 | |
8b6f6573 | 263 | (defun gnus-html-display-image (url start end &optional alt-text) |
2c8b2fc8 JD |
264 | "Display image at URL on text from START to END. |
265 | Use ALT-TEXT for the image string." | |
6568a67d KY |
266 | (or alt-text (setq alt-text "*")) |
267 | (if (string-match "\\`cid:" url) | |
268 | (let ((handle (mm-get-content-id (substring url (match-end 0))))) | |
269 | (when handle | |
270 | (gnus-html-put-image (mm-with-part handle (buffer-string)) | |
271 | url alt-text))) | |
272 | (if (gnus-html-cache-expired url gnus-html-image-cache-ttl) | |
273 | ;; We don't have it, so schedule it for fetching | |
274 | ;; asynchronously. | |
275 | (gnus-html-schedule-image-fetching | |
276 | (current-buffer) | |
277 | (list url alt-text)) | |
278 | ;; It's already cached, so just insert it. | |
279 | (gnus-html-put-image (gnus-html-get-image-data url) url alt-text)))) | |
698ecd82 LMI |
280 | |
281 | (defun gnus-html-wash-tags () | |
282 | (let (tag parameters string start end images url) | |
283 | (gnus-html-pre-wash) | |
284 | (gnus-html-wash-images) | |
9778a07a | 285 | |
f39ccb2e | 286 | (goto-char (point-min)) |
9778a07a | 287 | ;; Then do the other tags. |
b1992461 | 288 | (while (re-search-forward "<\\([^ />]+\\)\\([^>]*\\)>" nil t) |
655efd71 KY |
289 | (setq tag (match-string 1) |
290 | parameters (match-string 2) | |
b1992461 | 291 | start (match-beginning 0)) |
d99a4591 | 292 | (when (> (length parameters) 0) |
b1992461 KY |
293 | (set-text-properties 0 (1- (length parameters)) nil parameters)) |
294 | (delete-region start (point)) | |
698ecd82 | 295 | (when (search-forward (concat "</" tag ">") nil t) |
b1992461 KY |
296 | (delete-region (match-beginning 0) (match-end 0))) |
297 | (setq end (point)) | |
655efd71 KY |
298 | (cond |
299 | ;; Fetch and insert a picture. | |
9778a07a | 300 | ((equal tag "img_alt")) |
655efd71 | 301 | ;; Add a link. |
c6c81576 LMI |
302 | ((or (equal tag "a") |
303 | (equal tag "A")) | |
655efd71 | 304 | (when (string-match "href=\"\\([^\"]+\\)" parameters) |
ad142133 | 305 | (setq url (match-string 1 parameters)) |
2aafbe5a | 306 | (gnus-message 8 "gnus-html-wash-tags: fetching link URL %s" url) |
655efd71 | 307 | (gnus-article-add-button start end |
562f5ce5 | 308 | 'browse-url (mm-url-decode-entities-string url) |
ad142133 | 309 | url) |
655efd71 KY |
310 | (let ((overlay (gnus-make-overlay start end))) |
311 | (gnus-overlay-put overlay 'evaporate t) | |
ad142133 | 312 | (gnus-overlay-put overlay 'gnus-button-url url) |
10e91ca9 | 313 | (gnus-put-text-property start end 'gnus-string url) |
655efd71 KY |
314 | (when gnus-article-mouse-face |
315 | (gnus-overlay-put overlay 'mouse-face gnus-article-mouse-face))))) | |
fe01e1a3 LMI |
316 | ;; The upper-case IMG_ALT is apparently just an artifact that |
317 | ;; should be deleted. | |
318 | ((equal tag "IMG_ALT") | |
319 | (delete-region start end)) | |
bdaa75c7 LMI |
320 | ;; w3m does not normalize the case |
321 | ((or (equal tag "b") | |
322 | (equal tag "B")) | |
323 | (gnus-overlay-put (gnus-make-overlay start end) 'face 'gnus-emphasis-bold)) | |
324 | ((or (equal tag "u") | |
325 | (equal tag "U")) | |
326 | (gnus-overlay-put (gnus-make-overlay start end) 'face 'gnus-emphasis-underline)) | |
327 | ((or (equal tag "i") | |
328 | (equal tag "I")) | |
329 | (gnus-overlay-put (gnus-make-overlay start end) 'face 'gnus-emphasis-italic)) | |
330 | ((or (equal tag "s") | |
331 | (equal tag "S")) | |
332 | (gnus-overlay-put (gnus-make-overlay start end) 'face 'gnus-emphasis-strikethru)) | |
333 | ((or (equal tag "ins") | |
334 | (equal tag "INS")) | |
335 | (gnus-overlay-put (gnus-make-overlay start end) 'face 'gnus-emphasis-underline)) | |
336 | ;; Handle different UL types | |
337 | ((equal tag "_SYMBOL") | |
338 | (when (string-match "TYPE=\\(.+\\)" parameters) | |
339 | (let ((type (string-to-number (match-string 1 parameters)))) | |
340 | (delete-region start end) | |
341 | (cond ((= type 33) (insert " ")) | |
342 | ((= type 34) (insert " ")) | |
343 | ((= type 35) (insert " ")) | |
344 | ((= type 36) (insert " ")) | |
345 | ((= type 37) (insert " ")) | |
346 | ((= type 38) (insert " ")) | |
347 | ((= type 39) (insert " ")) | |
348 | ((= type 40) (insert " ")) | |
349 | ((= type 42) (insert " ")) | |
350 | ((= type 43) (insert " ")) | |
351 | (t (insert " ")))))) | |
655efd71 KY |
352 | ;; Whatever. Just ignore the tag. |
353 | (t | |
b1992461 KY |
354 | )) |
355 | (goto-char start)) | |
356 | (goto-char (point-min)) | |
357 | ;; The output from -halfdump isn't totally regular, so strip | |
358 | ;; off any </pre_int>s that were left over. | |
f9e50677 | 359 | (while (re-search-forward "</pre_int>\\|</internal>" nil t) |
b1992461 | 360 | (replace-match "" t t)) |
74d8321d | 361 | (mm-url-decode-entities))) |
b1992461 | 362 | |
6568a67d | 363 | (defun gnus-html-insert-image (&rest args) |
10e91ca9 LMI |
364 | "Fetch and insert the image under point." |
365 | (interactive) | |
2c8b2fc8 | 366 | (apply 'gnus-html-display-image (get-text-property (point) 'gnus-image))) |
10e91ca9 | 367 | |
99fcd180 LMI |
368 | (defun gnus-html-show-alt-text () |
369 | "Show the ALT text of the image under point." | |
370 | (interactive) | |
371 | (message "%s" (get-text-property (point) 'gnus-alt-text))) | |
372 | ||
373 | (defun gnus-html-browse-image () | |
374 | "Browse the image under point." | |
375 | (interactive) | |
8b6f6573 | 376 | (browse-url (get-text-property (point) 'image-url))) |
99fcd180 | 377 | |
9778a07a LMI |
378 | (defun gnus-html-browse-url () |
379 | "Browse the image under point." | |
380 | (interactive) | |
381 | (let ((url (get-text-property (point) 'gnus-string))) | |
181cb5fb G |
382 | (cond |
383 | ((not url) | |
384 | (message "No link under point")) | |
385 | ((string-match "^mailto:" url) | |
386 | (gnus-url-mailto url)) | |
387 | (t | |
388 | (browse-url url))))) | |
9778a07a | 389 | |
2c8b2fc8 JD |
390 | (defun gnus-html-schedule-image-fetching (buffer image) |
391 | "Retrieve IMAGE, and place it into BUFFER on arrival." | |
392 | (gnus-message 8 "gnus-html-schedule-image-fetching: buffer %s, image %s" | |
393 | buffer image) | |
f3b146e9 LMI |
394 | (if (fboundp 'url-queue-retrieve) |
395 | (url-queue-retrieve (car image) | |
396 | 'gnus-html-image-fetched | |
038b3495 | 397 | (list buffer image) t t) |
130e977f | 398 | (ignore-errors |
f3b146e9 LMI |
399 | (url-retrieve (car image) |
400 | 'gnus-html-image-fetched | |
401 | (list buffer image))))) | |
b1992461 | 402 | |
286c4fc2 | 403 | (defun gnus-html-image-fetched (status buffer image) |
b069e5a6 G |
404 | "Callback function called when image has been fetched." |
405 | (unless (plist-get status :error) | |
b069e5a6 G |
406 | (when (and (or (search-forward "\n\n" nil t) |
407 | (search-forward "\r\n\r\n" nil t)) | |
138c0212 LMI |
408 | (not (eobp))) |
409 | (when gnus-html-image-automatic-caching | |
410 | (url-store-in-cache (current-buffer))) | |
411 | (when (buffer-live-p buffer) | |
412 | (let ((data (buffer-substring (point) (point-max)))) | |
413 | (with-current-buffer buffer | |
414 | (let ((inhibit-read-only t)) | |
415 | (gnus-html-put-image data (car image) (cadr image)))))))) | |
2c8b2fc8 JD |
416 | (kill-buffer (current-buffer))) |
417 | ||
418 | (defun gnus-html-get-image-data (url) | |
419 | "Get image data for URL. | |
420 | Return a string with image data." | |
421 | (with-temp-buffer | |
422 | (mm-disable-multibyte) | |
423 | (url-cache-extract (url-cache-create-filename url)) | |
b069e5a6 G |
424 | (when (or (search-forward "\n\n" nil t) |
425 | (search-forward "\r\n\r\n" nil t)) | |
2c8b2fc8 JD |
426 | (buffer-substring (point) (point-max))))) |
427 | ||
6f7e2ffd JD |
428 | (defun gnus-html-maximum-image-size () |
429 | "Return the maximum size of an image according to `gnus-max-image-proportion'." | |
430 | (let ((edges (gnus-window-inside-pixel-edges | |
431 | (get-buffer-window (current-buffer))))) | |
432 | ;; (width . height) | |
433 | (cons | |
434 | ;; Aimed width | |
435 | (truncate | |
436 | (* gnus-max-image-proportion | |
437 | (- (nth 2 edges) (nth 0 edges)))) | |
438 | ;; Aimed height | |
439 | (truncate (* gnus-max-image-proportion | |
440 | (- (nth 3 edges) (nth 1 edges))))))) | |
441 | ||
96fd6ea2 GM |
442 | ;; Behind display-graphic-p test. |
443 | (declare-function image-size "image.c" (spec &optional pixels frame)) | |
444 | ||
b069e5a6 | 445 | (defun gnus-html-put-image (data url &optional alt-text) |
6f7e2ffd | 446 | "Put an image with DATA from URL and optional ALT-TEXT." |
73137971 | 447 | (when (gnus-graphic-display-p) |
870409d4 | 448 | (let* ((start (text-property-any (point-min) (point-max) |
8b6f6573 | 449 | 'image-url url)) |
b069e5a6 | 450 | (end (when start |
8b6f6573 | 451 | (next-single-property-change start 'image-url)))) |
b069e5a6 G |
452 | ;; Image found? |
453 | (when start | |
454 | (let* ((image | |
455 | (ignore-errors | |
456 | (gnus-create-image data nil t))) | |
457 | (size (and image | |
458 | (if (featurep 'xemacs) | |
459 | (cons (glyph-width image) (glyph-height image)) | |
460 | (image-size image t))))) | |
461 | (save-excursion | |
462 | (goto-char start) | |
870409d4 | 463 | (let ((alt-text (or alt-text |
6568a67d KY |
464 | (buffer-substring-no-properties start end))) |
465 | (inhibit-read-only t)) | |
b069e5a6 G |
466 | (if (and image |
467 | ;; Kludge to avoid displaying 30x30 gif images, which | |
468 | ;; seems to be a signal of a broken image. | |
469 | (not (and (if (featurep 'xemacs) | |
470 | (glyphp image) | |
471 | (listp image)) | |
472 | (eq (if (featurep 'xemacs) | |
870409d4 G |
473 | (let ((d (cdadar |
474 | (specifier-spec-list | |
475 | (glyph-image image))))) | |
b069e5a6 G |
476 | (and (vectorp d) |
477 | (aref d 0))) | |
478 | (plist-get (cdr image) :type)) | |
479 | 'gif) | |
480 | (= (car size) 30) | |
481 | (= (cdr size) 30)))) | |
482 | ;; Good image, add it! | |
6f7e2ffd | 483 | (let ((image (gnus-rescale-image image (gnus-html-maximum-image-size)))) |
b069e5a6 G |
484 | (delete-region start end) |
485 | (gnus-put-image image alt-text 'external) | |
04db63bc G |
486 | (widget-convert-button |
487 | 'url-link start (point) | |
488 | :help-echo alt-text | |
489 | :keymap gnus-html-displayed-image-map | |
490 | url) | |
870409d4 G |
491 | (gnus-put-text-property start (point) |
492 | 'gnus-alt-text alt-text) | |
b069e5a6 | 493 | (when url |
195b2593 KY |
494 | (gnus-add-text-properties |
495 | start (point) | |
496 | `(image-url | |
497 | ,url | |
498 | image-displayer | |
499 | (lambda (url start end) | |
ceb90e51 | 500 | (gnus-html-display-image url start end |
195b2593 | 501 | ,alt-text))))) |
b069e5a6 G |
502 | (gnus-add-image 'external image) |
503 | t) | |
504 | ;; Bad image, try to show something else | |
505 | (when (fboundp 'find-image) | |
506 | (delete-region start end) | |
870409d4 G |
507 | (setq image (find-image |
508 | '((:type xpm :file "lock-broken.xpm")))) | |
b069e5a6 G |
509 | (gnus-put-image image alt-text 'internal) |
510 | (gnus-add-image 'internal image)) | |
511 | nil)))))))) | |
2c8b2fc8 | 512 | |
c6c81576 | 513 | (defun gnus-html-image-url-blocked-p (url blocked-images) |
99fcd180 | 514 | "Find out if URL is blocked by BLOCKED-IMAGES." |
c6c81576 LMI |
515 | (let ((ret (and blocked-images |
516 | (string-match blocked-images url)))) | |
2aafbe5a TZ |
517 | (if ret |
518 | (gnus-message 8 "gnus-html-image-url-blocked-p: %s blocked by regex %s" | |
519 | url blocked-images) | |
520 | (gnus-message 9 "gnus-html-image-url-blocked-p: %s passes regex %s" | |
521 | url blocked-images)) | |
d743e0d1 TZ |
522 | ret)) |
523 | ||
b1992461 KY |
524 | ;;;###autoload |
525 | (defun gnus-html-prefetch-images (summary) | |
bdaa75c7 | 526 | (when (buffer-live-p summary) |
b59a9eef | 527 | (let (inhibit-images blocked-images) |
18c01d76 | 528 | (with-current-buffer summary |
b59a9eef KY |
529 | (setq inhibit-images gnus-inhibit-images |
530 | blocked-images (gnus-blocked-images))) | |
b1992461 | 531 | (save-match-data |
d815edf0 | 532 | (while (re-search-forward "<img[^>]+src=[\"']\\(http[^\"']+\\)" nil t) |
de635afe G |
533 | (let ((url (gnus-html-encode-url |
534 | (mm-url-decode-entities-string (match-string 1))))) | |
b59a9eef | 535 | (unless (or inhibit-images |
6568a67d | 536 | (gnus-html-image-url-blocked-p url blocked-images)) |
2c8b2fc8 JD |
537 | (when (gnus-html-cache-expired url gnus-html-image-cache-ttl) |
538 | (gnus-html-schedule-image-fetching nil | |
539 | (list url)))))))))) | |
b1992461 KY |
540 | |
541 | (provide 'gnus-html) | |
655efd71 KY |
542 | |
543 | ;;; gnus-html.el ends here |