;;; Code:
+(eval-when-compile (require 'cl))
+(eval-when-compile (require 'mm-decode))
+(require 'mm-url)
+
(defcustom gnus-html-cache-directory (nnheader-concat gnus-directory "html-cache/")
"Where Gnus will cache images it downloads from the web."
+ :version "24.1"
:group 'gnus-art
:type 'directory)
(defcustom gnus-html-cache-size 500000000
"The size of the Gnus image cache."
+ :version "24.1"
:group 'gnus-art
:type 'integer)
(defcustom gnus-html-frame-width 70
"What width to use when rendering HTML."
+ :version "24.1"
:group 'gnus-art
:type 'integer)
+(defcustom gnus-blocked-images "."
+ "Images that have URLs matching this regexp will be blocked."
+ :version "24.1"
+ :group 'gnus-art
+ :type 'regexp)
+
+(defcustom gnus-max-image-proportion 0.7
+ "How big pictures displayed are in relation to the window they're in.
+A value of 0.7 means that they are allowed to take up 70% of the
+width and height of the window. If they are larger than this,
+and Emacs supports it, then the images will be rescaled down to
+fit these criteria."
+ :version "24.1"
+ :group 'gnus-art
+ :type 'float)
+
;;;###autoload
(defun gnus-article-html (handle)
(let ((article-buffer (current-buffer)))
(save-restriction
(narrow-to-region (point) (point))
(save-excursion
- (set-buffer (car handle))
- (call-process-region (point-min) (point-max)
- "w3m"
- nil article-buffer nil
- "-halfdump"
- "-t" (format "%s" tab-width)
- "-cols" (format "%s" gnus-html-frame-width)
- "-T" "text/html"))
+ (mm-with-part handle
+ (let* ((coding-system-for-read 'utf-8)
+ (coding-system-for-write 'utf-8)
+ (default-process-coding-system
+ (cons coding-system-for-read coding-system-for-write))
+ (charset (mail-content-type-get (mm-handle-type handle)
+ 'charset)))
+ (when (and charset
+ (setq charset (mm-charset-to-coding-system charset))
+ (not (eq charset 'ascii)))
+ (mm-decode-coding-region (point-min) (point-max) charset))
+ (call-process-region (point-min) (point-max)
+ "w3m"
+ nil article-buffer nil
+ "-halfdump"
+ "-no-cookie"
+ "-I" "UTF-8"
+ "-O" "UTF-8"
+ "-o" "ext_halfdump=1"
+ "-o" "pre_conv=1"
+ "-t" (format "%s" tab-width)
+ "-cols" (format "%s" gnus-html-frame-width)
+ "-o" "display_image=off"
+ "-T" "text/html"))))
(gnus-html-wash-tags))))
+(defvar gnus-article-mouse-face)
+
(defun gnus-html-wash-tags ()
- (let (tag parameters string start end images)
+ (let (tag parameters string start end images url)
+ (mm-url-decode-entities)
(goto-char (point-min))
(while (re-search-forward "<\\([^ />]+\\)\\([^>]*\\)>" nil t)
(setq tag (match-string 1)
parameters (match-string 2)
start (match-beginning 0))
+ (when (plusp (length parameters))
+ (set-text-properties 0 (1- (length parameters)) nil parameters))
(delete-region start (point))
- (when (search-forward (concat "</" tag ">"))
+ (when (search-forward (concat "</" tag ">") nil t)
(delete-region (match-beginning 0) (match-end 0)))
(setq end (point))
(cond
;; Fetch and insert a picture.
((equal tag "img_alt")
- (when (string-match "src=\"\\([^\"]+\\)" parameters)
- (setq parameters (match-string 1 parameters))
- (when (or (null mm-w3m-safe-url-regexp)
- (string-match mm-w3m-safe-url-regexp parameters))
- (let ((file (gnus-html-image-id parameters)))
- (if (file-exists-p file)
- ;; It's already cached, so just insert it.
- (progn
- (put-image (create-image file) (point))
- ;; Delete the ALT text.
- (delete-region start end))
- ;; We don't have it, so schedule it for fetching
- ;; asynchronously.
- (push (list parameters
- (set-marker (make-marker) start)
- (point-marker))
- images))))))
+ (when (string-match "src=\"\\([^\"]+\\)" parameters)
+ (setq url (match-string 1 parameters))
+ (gnus-message 8 "Fetching image URL %s" url)
+ (if (string-match "^cid:\\(.*\\)" url)
+ ;; URLs with cid: have their content stashed in other
+ ;; parts of the MIME structure, so just insert them
+ ;; immediately.
+ (let ((handle (mm-get-content-id
+ (setq url (match-string 1 url))))
+ image)
+ (when handle
+ (mm-with-part handle
+ (setq image (gnus-create-image (buffer-string)
+ nil t))))
+ (when image
+ (let ((string (buffer-substring start end)))
+ (delete-region start end)
+ (gnus-put-image image (gnus-string-or string "*")))))
+ ;; Normal, external URL.
+ (when (or (null gnus-blocked-images)
+ (not (string-match gnus-blocked-images url)))
+ (let ((file (gnus-html-image-id url)))
+ (if (file-exists-p file)
+ ;; It's already cached, so just insert it.
+ (let ((string (buffer-substring start end)))
+ ;; Delete the ALT text.
+ (delete-region start end)
+ (gnus-html-put-image file (point) string))
+ ;; We don't have it, so schedule it for fetching
+ ;; asynchronously.
+ (push (list url
+ (set-marker (make-marker) start)
+ (point-marker))
+ images)))))))
;; Add a link.
((equal tag "a")
(when (string-match "href=\"\\([^\"]+\\)" parameters)
- (setq parameters (match-string 1 parameters))
+ (setq url (match-string 1 parameters))
+ (gnus-message 8 "Fetching link URL %s" url)
(gnus-article-add-button start end
- 'browse-url parameters)
+ 'browse-url url
+ url)
(let ((overlay (gnus-make-overlay start end)))
(gnus-overlay-put overlay 'evaporate t)
- (gnus-overlay-put overlay 'gnus-button-url parameters)
+ (gnus-overlay-put overlay 'gnus-button-url url)
(when gnus-article-mouse-face
(gnus-overlay-put overlay 'mouse-face gnus-article-mouse-face)))))
+ ;; The upper-case IMG_ALT is apparently just an artifact that
+ ;; should be deleted.
+ ((equal tag "IMG_ALT")
+ (delete-region start end))
;; Whatever. Just ignore the tag.
(t
))
(goto-char start))
- ;; Delete any excessive space at the start.
(goto-char (point-min))
- (when (and (re-search-forward "[^ \t\n]" nil t)
- (> (match-beginning 0) (point-min)))
- (delete-region (point-min) (1- (match-beginning 0))))
+ ;; The output from -halfdump isn't totally regular, so strip
+ ;; off any </pre_int>s that were left over.
+ (while (re-search-forward "</pre_int>" nil t)
+ (replace-match "" t t))
(when images
(gnus-html-schedule-image-fetching (current-buffer) (nreverse images)))))
(defun gnus-html-schedule-image-fetching (buffer images)
+ (gnus-message 8 "Scheduling image fetching in buffer %s, images %s" buffer images)
(let* ((url (caar images))
(process (start-process
"images" nil "curl"
"-s" "--create-dirs"
+ "--location"
+ "--max-time" "60"
"-o" (gnus-html-image-id url)
url)))
+ (process-kill-without-query process)
(set-process-sentinel process 'gnus-html-curl-sentinel)
- (set-process-plist process (list 'images images
- 'buffer buffer))))
+ (gnus-set-process-plist process (list 'images images
+ 'buffer buffer))))
(defun gnus-html-image-id (url)
(expand-file-name (sha1 url) gnus-html-cache-directory))
(defun gnus-html-curl-sentinel (process event)
(when (string-match "finished" event)
- (let* ((images (getf (process-plist process) 'images))
- (buffer (getf (process-plist process) 'buffer))
+ (let* ((images (gnus-process-get process 'images))
+ (buffer (gnus-process-get process 'buffer))
(spec (pop images))
(file (gnus-html-image-id (car spec))))
- (when (file-exists-p file)
- (save-excursion
- (set-buffer buffer)
- (let ((buffer-read-only nil))
+ (when (and (buffer-live-p buffer)
+ ;; If the position of the marker is 1, then that
+ ;; means that the text it was in has been deleted;
+ ;; i.e., that the user has selected a different
+ ;; article before the image arrived.
+ (not (= (marker-position (cadr spec)) (point-min))))
+ (with-current-buffer buffer
+ (let ((inhibit-read-only t)
+ (string (buffer-substring (cadr spec) (caddr spec))))
(delete-region (cadr spec) (caddr spec))
- (put-image (create-image file) (cadr spec)))))
+ (gnus-html-put-image file (cadr spec) string))))
(when images
(gnus-html-schedule-image-fetching buffer images)))))
+(defun gnus-html-put-image (file point string)
+ (when (display-graphic-p)
+ (let ((image (ignore-errors
+ (gnus-create-image file))))
+ (save-excursion
+ (goto-char point)
+ (if (and image
+ ;; Kludge to avoid displaying 30x30 gif images, which
+ ;; seems to be a signal of a broken image.
+ (not (and (listp image)
+ (eq (plist-get (cdr image) :type) 'gif)
+ (= (car (image-size image t)) 30)
+ (= (cdr (image-size image t)) 30))))
+ (progn
+ (gnus-put-image (gnus-html-rescale-image image)
+ (gnus-string-or string "*"))
+ t)
+ (insert string)
+ (when (fboundp 'find-image)
+ (gnus-put-image (find-image
+ '((:type xpm :file "lock-broken.xpm")))
+ (gnus-string-or string "*")))
+ nil)))))
+
+(defun gnus-html-rescale-image (image)
+ (if (not (fboundp 'imagemagick-types))
+ image
+ (let* ((width (car (image-size image t)))
+ (height (cdr (image-size image t)))
+ (edges (window-pixel-edges))
+ (window-width (truncate (* gnus-max-image-proportion
+ (- (nth 2 edges) (nth 0 edges)))))
+ (window-height (truncate (* gnus-max-image-proportion
+ (- (nth 3 edges) (nth 1 edges)))))
+ scaled-image)
+ (when (> width window-width)
+ (setq window-height (truncate (* window-height
+ (/ (* 1.0 window-width) width)))))
+ (or
+ (cond ((> height window-height)
+ (create-image file 'imagemagick nil
+ :height window-height))
+ ((> width window-width)
+ (create-image file 'imagemagick nil
+ :width window-width)))
+ image))))
+
(defun gnus-html-prune-cache ()
(let ((total-size 0)
files)
(decf total-size (cadr file))
(delete-file (nth 2 file)))))))
+;;;###autoload
+(defun gnus-html-prefetch-images (summary)
+ (let (blocked-images urls)
+ (when (buffer-live-p summary)
+ (with-current-buffer summary
+ (setq blocked-images gnus-blocked-images))
+ (save-match-data
+ (while (re-search-forward "<img.*src=[\"']\\([^\"']+\\)" nil t)
+ (let ((url (match-string 1)))
+ (if (or (null blocked-images)
+ (not (string-match blocked-images url)))
+ (unless (file-exists-p (gnus-html-image-id url))
+ (push url urls)
+ (push (gnus-html-image-id url) urls)
+ (push "-o" urls))
+ (gnus-message 8 "Image URL %s is blocked" url))))
+ (let ((process
+ (apply 'start-process
+ "images" nil "curl"
+ "-s" "--create-dirs"
+ "--location"
+ "--max-time" "60"
+ urls)))
+ (process-kill-without-query process))))))
+
+(provide 'gnus-html)
+
;;; gnus-html.el ends here
projects / gnus / blobdiff