-;;; mm-view.el --- Functions for viewing MIME objects
-;; Copyright (C) 1998 Free Software Foundation, Inc.
+;;; mm-view.el --- functions for viewing MIME objects
+;; Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; This file is part of GNU Emacs.
;;; Code:
+(eval-when-compile (require 'cl))
(require 'mail-parse)
(require 'mailcap)
(require 'mm-bodies)
+(require 'mm-decode)
+
+(eval-and-compile
+ (autoload 'gnus-article-prepare-display "gnus-art")
+ (autoload 'vcard-parse-string "vcard")
+ (autoload 'vcard-format-string "vcard")
+ (autoload 'fill-flowed "flow-fill")
+ (autoload 'html2text "html2text")
+ (unless (fboundp 'diff-mode)
+ (autoload 'diff-mode "diff-mode" "" t nil)))
+
+(defvar mm-text-html-renderer-alist
+ '((w3 . mm-inline-text-html-render-with-w3)
+ (w3m . mm-inline-text-html-render-with-w3m)
+ (w3m-standalone mm-inline-render-with-stdin nil
+ "w3m" "-dump" "-T" "text/html")
+ (links mm-inline-render-with-file
+ mm-links-remove-leading-blank
+ "links" "-dump" file)
+ (lynx mm-inline-render-with-stdin nil
+ "lynx" "-dump" "-force_html" "-stdin")
+ (html2text mm-inline-render-with-function html2text))
+ "The attributes of renderer types for text/html.")
+
+(defvar mm-text-html-washer-alist
+ '((w3 . gnus-article-wash-html-with-w3)
+ (w3m . gnus-article-wash-html-with-w3m)
+ (w3m-standalone mm-inline-render-with-stdin nil
+ "w3m" "-dump" "-T" "text/html")
+ (links mm-inline-wash-with-file
+ mm-links-remove-leading-blank
+ "links" "-dump" file)
+ (lynx mm-inline-wash-with-stdin nil
+ "lynx" "-dump" "-force_html" "-stdin")
+ (html2text html2text))
+ "The attributes of washer types for text/html.")
+
+;;; Internal variables.
;;;
;;; Functions for displaying various formats inline
;;;
-(defun mm-inline-image (handle)
- (let ((type (cadr (split-string (car (mm-handle-type handle)) "/")))
- buffer-read-only image)
- (mm-with-unibyte-buffer
- (insert-buffer-substring (mm-handle-buffer handle))
- (mm-decode-content-transfer-encoding (mm-handle-encoding handle))
- (setq image (make-image-specifier
- (vector (intern type) :data (buffer-string)))))
- (let ((annot (make-annotation image nil 'text)))
- (set-extent-property annot 'mm t)
- (set-extent-property annot 'duplicable t)
- (mm-handle-set-undisplayer handle annot))
- (insert " ")))
+(defun mm-inline-image-emacs (handle)
+ (let ((b (point-marker))
+ buffer-read-only)
+ (insert "\n")
+ (put-image (mm-get-image handle) b)
+ (mm-handle-set-undisplayer
+ handle
+ `(lambda () (remove-images ,b (1+ ,b))))))
-(defun mm-inline-text (handle)
- (let ((type (cadr (split-string (car (mm-handle-type handle)) "/")))
- text buffer-read-only)
+(defun mm-inline-image-xemacs (handle)
+ (insert "\n")
+ (forward-char -1)
+ (let ((b (point))
+ (annot (make-annotation (mm-get-image handle) nil 'text))
+ buffer-read-only)
+ (mm-handle-set-undisplayer
+ handle
+ `(lambda ()
+ (let (buffer-read-only)
+ (delete-annotation ,annot)
+ (delete-region ,(set-marker (make-marker) b)
+ ,(set-marker (make-marker) (point))))))
+ (set-extent-property annot 'mm t)
+ (set-extent-property annot 'duplicable t)))
+
+(eval-and-compile
+ (if (featurep 'xemacs)
+ (defalias 'mm-inline-image 'mm-inline-image-xemacs)
+ (defalias 'mm-inline-image 'mm-inline-image-emacs)))
+
+(defvar mm-w3-setup nil)
+(defun mm-setup-w3 ()
+ (unless mm-w3-setup
+ (require 'w3)
+ (w3-do-setup)
+ (require 'url)
+ (require 'w3-vars)
+ (require 'url-vars)
+ (setq mm-w3-setup t)))
+
+(defun mm-inline-text-html-render-with-w3 (handle)
+ (mm-setup-w3)
+ (let ((text (mm-get-part handle))
+ (b (point))
+ (url-standalone-mode t)
+ (url-gateway-unplugged t)
+ (w3-honor-stylesheets nil)
+ (url-current-object
+ (url-generic-parse-url (format "cid:%s" (mm-handle-id handle))))
+ (width (window-width))
+ (charset (mail-content-type-get
+ (mm-handle-type handle) 'charset)))
+ (save-excursion
+ (insert text)
+ (save-restriction
+ (narrow-to-region b (point))
+ (goto-char (point-min))
+ (if (or (and (boundp 'w3-meta-content-type-charset-regexp)
+ (re-search-forward
+ w3-meta-content-type-charset-regexp nil t))
+ (and (boundp 'w3-meta-charset-content-type-regexp)
+ (re-search-forward
+ w3-meta-charset-content-type-regexp nil t)))
+ (setq charset
+ (or (let ((bsubstr (buffer-substring-no-properties
+ (match-beginning 2)
+ (match-end 2))))
+ (if (fboundp 'w3-coding-system-for-mime-charset)
+ (w3-coding-system-for-mime-charset bsubstr)
+ (mm-charset-to-coding-system bsubstr)))
+ charset)))
+ (delete-region (point-min) (point-max))
+ (insert (mm-decode-string text charset))
+ (save-window-excursion
+ (save-restriction
+ (let ((w3-strict-width width)
+ ;; Don't let w3 set the global version of
+ ;; this variable.
+ (fill-column fill-column))
+ (if (or debug-on-error debug-on-quit)
+ (w3-region (point-min) (point-max))
+ (condition-case ()
+ (w3-region (point-min) (point-max))
+ (error
+ (delete-region (point-min) (point-max))
+ (let ((b (point))
+ (charset (mail-content-type-get
+ (mm-handle-type handle) 'charset)))
+ (if (or (eq charset 'gnus-decoded)
+ (eq mail-parse-charset 'gnus-decoded))
+ (save-restriction
+ (narrow-to-region (point) (point))
+ (mm-insert-part handle)
+ (goto-char (point-max)))
+ (insert (mm-decode-string (mm-get-part handle)
+ charset))))
+ (message
+ "Error while rendering html; showing as text/plain")))))))
+ (mm-handle-set-undisplayer
+ handle
+ `(lambda ()
+ (let (buffer-read-only)
+ (if (functionp 'remove-specifier)
+ (mapcar (lambda (prop)
+ (remove-specifier
+ (face-property 'default prop)
+ (current-buffer)))
+ '(background background-pixmap foreground)))
+ (delete-region ,(point-min-marker)
+ ,(point-max-marker)))))))))
+
+(defvar mm-w3m-setup nil
+ "Whether gnus-article-mode has been setup to use emacs-w3m.")
+
+(defun mm-setup-w3m ()
+ "Setup gnus-article-mode to use emacs-w3m."
+ (unless mm-w3m-setup
+ (require 'w3m)
+ (unless (assq 'gnus-article-mode w3m-cid-retrieve-function-alist)
+ (push (cons 'gnus-article-mode 'mm-w3m-cid-retrieve)
+ w3m-cid-retrieve-function-alist))
+ (setq mm-w3m-setup t)))
+
+(defun mm-w3m-cid-retrieve (url &rest args)
+ "Insert a content pointed by URL if it has the cid: scheme."
+ (when (string-match "\\`cid:" url)
+ (setq url (concat "<" (substring url (match-end 0)) ">"))
+ (catch 'found-handle
+ (dolist (handle (with-current-buffer w3m-current-buffer
+ gnus-article-mime-handles))
+ (when (and (listp handle)
+ (equal url (mm-handle-id handle)))
+ (mm-insert-part handle)
+ (throw 'found-handle (mm-handle-media-type handle)))))))
+
+(eval-and-compile
+ (unless (or (featurep 'xemacs)
+ (>= emacs-major-version 21))
+ (defvar mm-w3m-mode-map nil
+ "Keymap for text/html part rendered by `mm-w3m-preview-text/html'.
+This map is overwritten by `mm-w3m-local-map-property' based on the
+value of `w3m-minor-mode-map'. Therefore, in order to add some
+commands to this map, add them to `w3m-minor-mode-map' instead of this
+map.")))
+
+(defun mm-w3m-local-map-property ()
+ (when (and (boundp 'w3m-minor-mode-map) w3m-minor-mode-map)
+ (if (or (featurep 'xemacs)
+ (>= emacs-major-version 21))
+ (list 'keymap w3m-minor-mode-map)
+ (list 'local-map
+ (or mm-w3m-mode-map
+ (progn
+ (setq mm-w3m-mode-map (copy-keymap w3m-minor-mode-map))
+ (set-keymap-parent mm-w3m-mode-map gnus-article-mode-map)
+ mm-w3m-mode-map))))))
+
+(defun mm-inline-text-html-render-with-w3m (handle)
+ "Render a text/html part using emacs-w3m."
+ (mm-setup-w3m)
+ (let ((text (mm-get-part handle))
+ (b (point))
+ (charset (mail-content-type-get (mm-handle-type handle) 'charset)))
+ (save-excursion
+ (insert text)
+ (save-restriction
+ (narrow-to-region b (point))
+ (goto-char (point-min))
+ (when (re-search-forward w3m-meta-content-type-charset-regexp nil t)
+ (setq charset (or (w3m-charset-to-coding-system (match-string 2))
+ charset)))
+ (when charset
+ (delete-region (point-min) (point-max))
+ (insert (mm-decode-string text charset)))
+ (let ((w3m-safe-url-regexp mm-w3m-safe-url-regexp)
+ (w3m-display-inline-images mm-inline-text-html-with-images)
+ w3m-force-redisplay)
+ (w3m-region (point-min) (point-max)))
+ (when mm-inline-text-html-with-w3m-keymap
+ (add-text-properties
+ (point-min) (point-max)
+ (nconc (mm-w3m-local-map-property)
+ '(mm-inline-text-html-with-w3m t)))))
+ (mm-handle-set-undisplayer
+ handle
+ `(lambda ()
+ (let (buffer-read-only)
+ (if (functionp 'remove-specifier)
+ (mapcar (lambda (prop)
+ (remove-specifier
+ (face-property 'default prop)
+ (current-buffer)))
+ '(background background-pixmap foreground)))
+ (delete-region ,(point-min-marker)
+ ,(point-max-marker))))))))
+
+(defun mm-links-remove-leading-blank ()
+ ;; Delete the annoying three spaces preceding each line of links
+ ;; output.
+ (goto-char (point-min))
+ (while (re-search-forward "^ " nil t)
+ (delete-region (match-beginning 0) (match-end 0))))
+
+(defun mm-inline-wash-with-file (post-func cmd &rest args)
+ (let ((file (mm-make-temp-file
+ (expand-file-name "mm" mm-tmp-directory))))
+ (let ((coding-system-for-write 'binary))
+ (write-region (point-min) (point-max) file nil 'silent))
+ (delete-region (point-min) (point-max))
+ (unwind-protect
+ (apply 'call-process cmd nil t nil (mapcar 'eval args))
+ (delete-file file))
+ (and post-func (funcall post-func))))
+
+(defun mm-inline-wash-with-stdin (post-func cmd &rest args)
+ (let ((coding-system-for-write 'binary))
+ (apply 'call-process-region (point-min) (point-max)
+ cmd t t nil args))
+ (and post-func (funcall post-func)))
+
+(defun mm-inline-render-with-file (handle post-func cmd &rest args)
+ (let ((source (mm-get-part handle)))
+ (mm-insert-inline
+ handle
+ (mm-with-unibyte-buffer
+ (insert source)
+ (apply 'mm-inline-wash-with-file post-func cmd args)
+ (buffer-string)))))
+
+(defun mm-inline-render-with-stdin (handle post-func cmd &rest args)
+ (let ((source (mm-get-part handle)))
+ (mm-insert-inline
+ handle
+ (mm-with-unibyte-buffer
+ (insert source)
+ (apply 'mm-inline-wash-with-stdin post-func cmd args)
+ (buffer-string)))))
+
+(defun mm-inline-render-with-function (handle func &rest args)
+ (let ((source (mm-get-part handle)))
+ (mm-insert-inline
+ handle
+ (mm-with-unibyte-buffer
+ (insert source)
+ (apply func args)
+ (buffer-string)))))
+
+(defun mm-inline-text-html (handle)
+ (let* ((func (or mm-inline-text-html-renderer mm-text-html-renderer))
+ (entry (assq func mm-text-html-renderer-alist))
+ buffer-read-only)
+ (if entry
+ (setq func (cdr entry)))
(cond
- ((equal type "plain")
- (with-temp-buffer
- (insert-buffer-substring (mm-handle-buffer handle))
- (mm-decode-content-transfer-encoding (mm-handle-encoding handle))
- (setq text (buffer-string)))
- (let ((b (point)))
- (insert text)
+ ((gnus-functionp func)
+ (funcall func handle))
+ (t
+ (apply (car func) handle (cdr func))))))
+
+(defun mm-inline-text-vcard (handle)
+ (let (buffer-read-only)
+ (mm-insert-inline
+ handle
+ (concat "\n-- \n"
+ (ignore-errors
+ (if (fboundp 'vcard-pretty-print)
+ (vcard-pretty-print (mm-get-part handle))
+ (vcard-format-string
+ (vcard-parse-string (mm-get-part handle)
+ 'vcard-standard-filter))))))))
+
+(defun mm-inline-text (handle)
+ (let ((b (point))
+ (type (mm-handle-media-subtype handle))
+ (charset (mail-content-type-get
+ (mm-handle-type handle) 'charset))
+ buffer-read-only)
+ (if (or (eq charset 'gnus-decoded)
+ ;; This is probably not entirely correct, but
+ ;; makes rfc822 parts with embedded multiparts work.
+ (eq mail-parse-charset 'gnus-decoded))
(save-restriction
- (narrow-to-region b (point))
- (let ((charset (mail-content-type-get
- (mm-handle-type handle) 'charset)))
- (when charset
- (mm-decode-body charset nil)))
- (mm-handle-set-undisplayer
- handle
- `(lambda ()
- (let (buffer-read-only)
- (delete-region
- ,(set-marker (make-marker) (point-min))
- ,(set-marker (make-marker) (point-max)))))))))
- ((equal type "html")
- (save-excursion
- (w3-do-setup)
- (mm-with-unibyte-buffer
- (insert-buffer-substring (mm-handle-buffer handle))
- (mm-decode-content-transfer-encoding (mm-handle-encoding handle))
- (require 'url)
- (save-window-excursion
- (w3-region (point-min) (point-max))
- (setq text (buffer-string))))
- (mm-insert-inline handle text)))
- ((or (equal type "enriched")
- (equal type "richtext"))
- (save-excursion
- (mm-with-unibyte-buffer
- (insert-buffer-substring (mm-handle-buffer handle))
- (mm-decode-content-transfer-encoding (mm-handle-encoding handle))
- (save-window-excursion
- (enriched-decode (point-min) (point-max))
- (setq text (buffer-string))))
- (mm-insert-inline handle text)))
- )))
+ (narrow-to-region (point) (point))
+ (mm-insert-part handle)
+ (goto-char (point-max)))
+ (insert (mm-decode-string (mm-get-part handle) charset)))
+ (when (and (equal type "plain")
+ (equal (cdr (assoc 'format (mm-handle-type handle)))
+ "flowed"))
+ (save-restriction
+ (narrow-to-region b (point))
+ (goto-char b)
+ (fill-flowed)
+ (goto-char (point-max))))
+ (save-restriction
+ (narrow-to-region b (point))
+ (set-text-properties (point-min) (point-max) nil)
+ (when (or (equal type "enriched")
+ (equal type "richtext"))
+ (enriched-decode (point-min) (point-max)))
+ (mm-handle-set-undisplayer
+ handle
+ `(lambda ()
+ (let (buffer-read-only)
+ (delete-region ,(point-min-marker)
+ ,(point-max-marker))))))))
(defun mm-insert-inline (handle text)
"Insert TEXT inline from HANDLE."
(let (buffer-read-only)
(delete-region ,(set-marker (make-marker) b)
,(set-marker (make-marker) (point))))))))
-
+
(defun mm-inline-audio (handle)
(message "Not implemented"))
(defun mm-w3-prepare-buffer ()
(require 'w3)
- (w3-prepare-buffer))
+ (let ((url-standalone-mode t)
+ (url-gateway-unplugged t)
+ (w3-honor-stylesheets nil))
+ (w3-prepare-buffer)))
+
+(defun mm-view-message ()
+ (mm-enable-multibyte)
+ (let (handles)
+ (let (gnus-article-mime-handles)
+ ;; Double decode problem may happen. See mm-inline-message.
+ (run-hooks 'gnus-article-decode-hook)
+ (gnus-article-prepare-display)
+ (setq handles gnus-article-mime-handles))
+ (when handles
+ (setq gnus-article-mime-handles
+ (mm-merge-handles gnus-article-mime-handles handles))))
+ (fundamental-mode)
+ (goto-char (point-min)))
+
+(defun mm-inline-message (handle)
+ (let ((b (point))
+ (bolp (bolp))
+ (charset (mail-content-type-get
+ (mm-handle-type handle) 'charset))
+ gnus-displaying-mime handles)
+ (when (and charset
+ (stringp charset))
+ (setq charset (intern (downcase charset)))
+ (when (eq charset 'us-ascii)
+ (setq charset nil)))
+ (save-excursion
+ (save-restriction
+ (narrow-to-region b b)
+ (mm-insert-part handle)
+ (let (gnus-article-mime-handles
+ ;; disable prepare hook
+ gnus-article-prepare-hook
+ (gnus-newsgroup-charset
+ (or charset gnus-newsgroup-charset)))
+ (run-hooks 'gnus-article-decode-hook)
+ (gnus-article-prepare-display)
+ (setq handles gnus-article-mime-handles))
+ (goto-char (point-min))
+ (unless bolp
+ (insert "\n"))
+ (goto-char (point-max))
+ (unless (bolp)
+ (insert "\n"))
+ (insert "----------\n\n")
+ (when handles
+ (setq gnus-article-mime-handles
+ (mm-merge-handles gnus-article-mime-handles handles)))
+ (mm-handle-set-undisplayer
+ handle
+ `(lambda ()
+ (let (buffer-read-only)
+ (if (fboundp 'remove-specifier)
+ ;; This is only valid on XEmacs.
+ (mapcar (lambda (prop)
+ (remove-specifier
+ (face-property 'default prop) (current-buffer)))
+ '(background background-pixmap foreground)))
+ (delete-region ,(point-min-marker) ,(point-max-marker)))))))))
+
+(defun mm-display-inline-fontify (handle mode)
+ (let (text)
+ ;; XEmacs @#$@ version of font-lock refuses to fully turn itself
+ ;; on for buffers whose name begins with " ". That's why we use
+ ;; save-current-buffer/get-buffer-create rather than
+ ;; with-temp-buffer.
+ (save-current-buffer
+ (set-buffer (generate-new-buffer "*fontification*"))
+ (unwind-protect
+ (progn
+ (buffer-disable-undo)
+ (mm-insert-part handle)
+ (funcall mode)
+ (require 'font-lock)
+ (let ((font-lock-verbose nil))
+ ;; I find font-lock a bit too verbose.
+ (font-lock-fontify-buffer))
+ ;; By default, XEmacs font-lock uses non-duplicable text
+ ;; properties. This code forces all the text properties
+ ;; to be copied along with the text.
+ (when (fboundp 'extent-list)
+ (map-extents (lambda (ext ignored)
+ (set-extent-property ext 'duplicable t)
+ nil)
+ nil nil nil nil nil 'text-prop))
+ (setq text (buffer-string)))
+ (kill-buffer (current-buffer))))
+ (mm-insert-inline handle text)))
+
+;; Shouldn't these functions check whether the user even wants to use
+;; font-lock? At least under XEmacs, this fontification is pretty
+;; much unconditional. Also, it would be nice to change for the size
+;; of the fontified region.
+
+(defun mm-display-patch-inline (handle)
+ (mm-display-inline-fontify handle 'diff-mode))
+
+(defun mm-display-elisp-inline (handle)
+ (mm-display-inline-fontify handle 'emacs-lisp-mode))
+
+;; id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
+;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 }
+(defvar mm-pkcs7-signed-magic
+ (mm-string-as-unibyte
+ (apply 'concat
+ (mapcar 'char-to-string
+ (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
+ ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
+ ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
+ ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x02)))))
+
+;; id-envelopedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
+;; us(840) rsadsi(113549) pkcs(1) pkcs7(7) 3 }
+(defvar mm-pkcs7-enveloped-magic
+ (mm-string-as-unibyte
+ (apply 'concat
+ (mapcar 'char-to-string
+ (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
+ ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
+ ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
+ ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x03)))))
+
+(defun mm-view-pkcs7-get-type (handle)
+ (mm-with-unibyte-buffer
+ (mm-insert-part handle)
+ (cond ((looking-at mm-pkcs7-enveloped-magic)
+ 'enveloped)
+ ((looking-at mm-pkcs7-signed-magic)
+ 'signed)
+ (t
+ (error "Could not identify PKCS#7 type")))))
+
+(defun mm-view-pkcs7 (handle)
+ (case (mm-view-pkcs7-get-type handle)
+ (enveloped (mm-view-pkcs7-decrypt handle))
+ (signed (mm-view-pkcs7-verify handle))
+ (otherwise (error "Unknown or unimplemented PKCS#7 type"))))
+
+(defun mm-view-pkcs7-verify (handle)
+ ;; A bogus implementation of PKCS#7. FIXME::
+ (mm-insert-part handle)
+ (goto-char (point-min))
+ (if (search-forward "Content-Type: " nil t)
+ (delete-region (point-min) (match-beginning 0)))
+ (goto-char (point-max))
+ (if (re-search-backward "--\r?\n?" nil t)
+ (delete-region (match-end 0) (point-max)))
+ (goto-char (point-min))
+ (while (search-forward "\r\n" nil t)
+ (replace-match "\n"))
+ (message "Verify signed PKCS#7 message is unimplemented.")
+ (sit-for 1)
+ t)
+
+(defun mm-view-pkcs7-decrypt (handle)
+ (insert-buffer (mm-handle-buffer handle))
+ (goto-char (point-min))
+ (insert "MIME-Version: 1.0\n")
+ (mm-insert-headers "application/pkcs7-mime" "base64" "smime.p7m")
+ (smime-decrypt-region
+ (point-min) (point-max)
+ (if (= (length smime-keys) 1)
+ (cadar smime-keys)
+ (smime-get-key-by-email
+ (completing-read
+ (concat "Decipher using which key? "
+ (if smime-keys (concat "(default " (caar smime-keys) ") ")
+ ""))
+ smime-keys nil nil nil nil (car-safe (car-safe smime-keys))))))
+ (goto-char (point-min))
+ (while (search-forward "\r\n" nil t)
+ (replace-match "\n"))
+ (goto-char (point-min)))
(provide 'mm-view)
-;; mm-view.el ends here
+;;; mm-view.el ends here
projects / elisp / gnus.git- / blobdiff