X-Git-Url: http://cgit.sxemacs.org/?a=blobdiff_plain;f=lisp%2Fgnus-html.el;h=a503859aa213c6275c78cdb3b6d11e013399527e;hb=46b9f1684f60dbc737f4bdcb6ad30de7a418db0c;hp=2492545a1a2a5933e725b75f478208d5473b2655;hpb=93112af86b3e0d6c1c2afe6a21b4ae9b9855df20;p=gnus diff --git a/lisp/gnus-html.el b/lisp/gnus-html.el index 2492545a1..a503859aa 100644 --- a/lisp/gnus-html.el +++ b/lisp/gnus-html.el @@ -28,122 +28,266 @@ ;;; 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) - "-o" "display_image=off" - "-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))) + (insert (prog1 + (mm-decode-coding-string (buffer-string) charset) + (erase-buffer) + (mm-enable-multibyte)))) + (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=on" + "-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 " *\n" nil t) + (replace-match "" t t)) + (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 "")) + (when (search-forward (concat "") 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 "gnus-html-wash-tags: 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. + (unless (gnus-html-image-url-blocked-p + url + (if (buffer-live-p gnus-summary-buffer) + (with-current-buffer gnus-summary-buffer + gnus-blocked-images) + gnus-blocked-images)) + (let ((file (gnus-html-image-id url)) + width height) + (when (string-match "height=\"?\\([0-9]+\\)" parameters) + (setq height (string-to-number (match-string 1 parameters)))) + (when (string-match "width=\"?\\([0-9]+\\)" parameters) + (setq width (string-to-number (match-string 1 parameters)))) + ;; Don't fetch images that are really small. They're + ;; probably tracking pictures. + (when (and (or (null height) + (> height 4)) + (or (null width) + (> width 4))) + (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") + ((or (equal tag "a") + (equal tag "A")) (when (string-match "href=\"\\([^\"]+\\)" parameters) - (setq parameters (match-string 1 parameters)) + (setq url (match-string 1 parameters)) + (gnus-message 8 "gnus-html-wash-tags: 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 s that were left over. + (while (re-search-forward "" 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 "gnus-html-schedule-image-fetching: 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 file) + (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 file) + (if (or (not (fboundp 'imagemagick-types)) + (not (get-buffer-window (current-buffer)))) + image + (let* ((width (car (image-size image t))) + (height (cdr (image-size image t))) + (edges (window-pixel-edges (get-buffer-window (current-buffer)))) + (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 (> height window-height) + (setq image (or (create-image file 'imagemagick nil + :height window-height) + image))) + (when (> (car (image-size image t)) window-width) + (setq image (or + (create-image file 'imagemagick nil + :width window-width) + image))) + image))) + (defun gnus-html-prune-cache () (let ((total-size 0) files) @@ -162,20 +306,40 @@ (decf total-size (cadr file)) (delete-file (nth 2 file))))))) -(defun gnus-html-prefetch-images () - (save-match-data - (let (urls) - (while (re-search-forward "