X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=lisp%2Fmm-decode.el;h=b3e13fe55be3ae0ac5cbbcf38c619ef9ede8fbdb;hb=3cf1618f34957ba08d8f91bdd552f9408d1d7a0f;hp=c7f868118183211d09ad246558051a7a5e78cb55;hpb=a3fbfe62d8a31ca9b3c0d18a4895e3a8924fc176;p=elisp%2Fgnus.git- diff --git a/lisp/mm-decode.el b/lisp/mm-decode.el index c7f8681..b3e13fe 100644 --- a/lisp/mm-decode.el +++ b/lisp/mm-decode.el @@ -1,9 +1,10 @@ ;;; mm-decode.el --- Functions for decoding MIME things -;; Copyright (C) 1998 Free Software Foundation, Inc. +;; Copyright (C) 1998, 1999, 2000, 2001, 2002, +;; 2003 Free Software Foundation, Inc. ;; Author: Lars Magne Ingebrigtsen ;; MORIOKA Tomohiko -;; This file is not yet part of GNU Emacs. +;; This file is part of GNU Emacs. ;; GNU Emacs is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by @@ -24,126 +25,1383 @@ ;;; Code: -(require 'base64) -(require 'qp) -(require 'nnheader) +(require 'mail-parse) +(require 'gnus-mailcap) +(require 'mm-bodies) +(eval-when-compile (require 'cl) + (require 'term)) -(defvar mm-charset-regexp (concat "[^" "][\000-\040()<>@,\;:\\\"/?.=" "]+")) +(eval-and-compile + (autoload 'executable-find "executable") + (autoload 'mm-inline-partial "mm-partial") + (autoload 'mm-inline-external-body "mm-extern") + (autoload 'mm-insert-inline "mm-view")) + +(add-hook 'gnus-exit-gnus-hook 'mm-destroy-postponed-undisplay-list) + +(defgroup mime-display () + "Display of MIME in mail and news articles." + :link '(custom-manual "(emacs-mime)Customization") + :version "21.1" + :group 'mail + :group 'news + :group 'multimedia) + +(defgroup mime-security () + "MIME security in mail and news articles." + :link '(custom-manual "(emacs-mime)Customization") + :group 'mail + :group 'news + :group 'multimedia) + +;;; Convenience macros. + +(defmacro mm-handle-buffer (handle) + `(nth 0 ,handle)) +(defmacro mm-handle-type (handle) + `(nth 1 ,handle)) +(defsubst mm-handle-media-type (handle) + (if (stringp (car handle)) + (car handle) + (car (mm-handle-type handle)))) +(defsubst mm-handle-media-supertype (handle) + (car (split-string (mm-handle-media-type handle) "/"))) +(defsubst mm-handle-media-subtype (handle) + (cadr (split-string (mm-handle-media-type handle) "/"))) +(defmacro mm-handle-encoding (handle) + `(nth 2 ,handle)) +(defmacro mm-handle-undisplayer (handle) + `(nth 3 ,handle)) +(defmacro mm-handle-set-undisplayer (handle function) + `(setcar (nthcdr 3 ,handle) ,function)) +(defmacro mm-handle-disposition (handle) + `(nth 4 ,handle)) +(defmacro mm-handle-description (handle) + `(nth 5 ,handle)) +(defmacro mm-handle-cache (handle) + `(nth 6 ,handle)) +(defmacro mm-handle-set-cache (handle contents) + `(setcar (nthcdr 6 ,handle) ,contents)) +(defmacro mm-handle-id (handle) + `(nth 7 ,handle)) +(defmacro mm-handle-multipart-original-buffer (handle) + `(get-text-property 0 'buffer (car ,handle))) +(defmacro mm-handle-multipart-from (handle) + `(get-text-property 0 'from (car ,handle))) +(defmacro mm-handle-multipart-ctl-parameter (handle parameter) + `(get-text-property 0 ,parameter (car ,handle))) + +(defmacro mm-make-handle (&optional buffer type encoding undisplayer + disposition description cache + id) + `(list ,buffer ,type ,encoding ,undisplayer + ,disposition ,description ,cache ,id)) + +(defcustom mm-text-html-renderer + (cond ((locate-library "w3") 'w3) + ((locate-library "w3m") 'w3m) + ((executable-find "links") 'links) + ((executable-find "lynx") 'lynx) + (t 'html2text)) + "Render of HTML contents. +It is one of defined renderer types, or a rendering function. +The defined renderer types are: +`w3' : using Emacs/W3; +`w3m' : using emacs-w3m; +`links': using links; +`lynx' : using lynx; +`html2text' : using html2text; +nil : using external viewer." + :type '(choice (const w3) + (const w3m) + (const links) + (const lynx) + (const html2text) + (const nil) + (function)) + :version "21.3" + :group 'mime-display) + +(defvar mm-inline-text-html-renderer nil + "Function used for rendering inline HTML contents. +It is suggested to customize `mm-text-html-renderer' instead.") + +(defcustom mm-inline-text-html-with-images nil + "If non-nil, Gnus will allow retrieving images in the HTML contents +with tags. It has no effect on Emacs/w3. See also +the documentation for the option `mm-w3m-safe-url-regexp'." + :type 'boolean + :group 'mime-display) + +(defcustom mm-w3m-safe-url-regexp "\\`cid:" + "Regexp that matches safe url names. +Some HTML mails might have a trick of spammers using tags. +It is likely to be intended to verify whether you have read the +mail. You can prevent your personal informations from leaking by +setting this to the regexp which matches the safe url names. The +value of the variable `w3m-safe-url-regexp' will be bound with +this value. You may set this value to nil if you consider all +urls to be safe." + :type '(choice (regexp :tag "Regexp") + (const :tag "All URLs are safe" nil)) + :group 'mime-display) + +(defcustom mm-inline-text-html-with-w3m-keymap t + "If non-nil, use emacs-w3m command keys in the article buffer." + :type 'boolean + :group 'mime-display) + +(defcustom mm-inline-media-tests + '(("image/jpeg" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'jpeg handle))) + ("image/png" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'png handle))) + ("image/gif" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'gif handle))) + ("image/tiff" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'tiff handle)) ) + ("image/xbm" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'xbm handle))) + ("image/x-xbitmap" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'xbm handle))) + ("image/xpm" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'xpm handle))) + ("image/x-xpixmap" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'xpm handle))) + ("image/bmp" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'bmp handle))) + ("image/x-portable-bitmap" + mm-inline-image + (lambda (handle) + (mm-valid-and-fit-image-p 'pbm handle))) + ("text/plain" mm-inline-text identity) + ("text/enriched" mm-inline-text identity) + ("text/richtext" mm-inline-text identity) + ("text/x-patch" mm-display-patch-inline + (lambda (handle) + (locate-library "diff-mode"))) + ("application/emacs-lisp" mm-display-elisp-inline identity) + ("application/x-emacs-lisp" mm-display-elisp-inline identity) + ("text/html" + mm-inline-text-html + (lambda (handle) + (or mm-inline-text-html-renderer + mm-text-html-renderer))) + ("text/x-vcard" + mm-inline-text-vcard + (lambda (handle) + (or (featurep 'vcard) + (locate-library "vcard")))) + ("message/delivery-status" mm-inline-text identity) + ("message/rfc822" mm-inline-message identity) + ("message/partial" mm-inline-partial identity) + ("message/external-body" mm-inline-external-body identity) + ("text/.*" mm-inline-text identity) + ("audio/wav" mm-inline-audio + (lambda (handle) + (and (or (featurep 'nas-sound) (featurep 'native-sound)) + (device-sound-enabled-p)))) + ("audio/au" + mm-inline-audio + (lambda (handle) + (and (or (featurep 'nas-sound) (featurep 'native-sound)) + (device-sound-enabled-p)))) + ("application/pgp-signature" ignore identity) + ("application/x-pkcs7-signature" ignore identity) + ("application/pkcs7-signature" ignore identity) + ("application/x-pkcs7-mime" ignore identity) + ("application/pkcs7-mime" ignore identity) + ("multipart/alternative" ignore identity) + ("multipart/mixed" ignore identity) + ("multipart/related" ignore identity) + ;; Disable audio and image + ("audio/.*" ignore ignore) + ("image/.*" ignore ignore) + ;; Default to displaying as text + (".*" mm-inline-text mm-readable-p)) + "Alist of media types/tests saying whether types can be displayed inline." + :type '(repeat (list (string :tag "MIME type") + (function :tag "Display function") + (function :tag "Display test"))) + :group 'mime-display) + +(defcustom mm-inlined-types + '("image/.*" "text/.*" "message/delivery-status" "message/rfc822" + "message/partial" "message/external-body" "application/emacs-lisp" + "application/x-emacs-lisp" + "application/pgp-signature" "application/x-pkcs7-signature" + "application/pkcs7-signature" "application/x-pkcs7-mime" + "application/pkcs7-mime") + "List of media types that are to be displayed inline. +See also `mm-inline-media-tests', which says how to display a media +type inline." + :type '(repeat string) + :group 'mime-display) + +(defcustom mm-keep-viewer-alive-types + '("application/postscript" "application/msword" "application/vnd.ms-excel" + "application/pdf" "application/x-dvi") + "List of media types for which the external viewer will not be killed +when selecting a different article." + :type '(repeat string) + :group 'mime-display) + +(defcustom mm-automatic-display + '("text/plain" "text/enriched" "text/richtext" "text/html" + "text/x-vcard" "image/.*" "message/delivery-status" "multipart/.*" + "message/rfc822" "text/x-patch" "application/pgp-signature" + "application/emacs-lisp" "application/x-emacs-lisp" + "application/x-pkcs7-signature" + "application/pkcs7-signature" "application/x-pkcs7-mime" + "application/pkcs7-mime") + "A list of MIME types to be displayed automatically." + :type '(repeat string) + :group 'mime-display) + +(defcustom mm-attachment-override-types '("text/x-vcard" + "application/pkcs7-mime" + "application/x-pkcs7-mime" + "application/pkcs7-signature" + "application/x-pkcs7-signature") + "Types to have \"attachment\" ignored if they can be displayed inline." + :type '(repeat string) + :group 'mime-display) + +(defcustom mm-inline-override-types nil + "Types to be treated as attachments even if they can be displayed inline." + :type '(repeat string) + :group 'mime-display) + +(defcustom mm-automatic-external-display nil + "List of MIME type regexps that will be displayed externally automatically." + :type '(repeat string) + :group 'mime-display) + +(defcustom mm-discouraged-alternatives nil + "List of MIME types that are discouraged when viewing multipart/alternative. +Viewing agents are supposed to view the last possible part of a message, +as that is supposed to be the richest. However, users may prefer other +types instead, and this list says what types are most unwanted. If, +for instance, text/html parts are very unwanted, and text/richtext are +somewhat unwanted, then the value of this variable should be set +to: + + (\"text/html\" \"text/richtext\")" + :type '(repeat string) + :group 'mime-display) + +(defcustom mm-tmp-directory + (if (fboundp 'temp-directory) + (temp-directory) + (if (boundp 'temporary-file-directory) + temporary-file-directory + "/tmp/")) + "Where mm will store its temporary files." + :type 'directory + :group 'mime-display) + +(defcustom mm-inline-large-images nil + "If non-nil, then all images fit in the buffer." + :type 'boolean + :group 'mime-display) + +(defvar mm-file-name-rewrite-functions nil + "*List of functions used for rewriting file names of MIME parts. +Each function takes a file name as input and returns a file name. + +Ready-made functions include +`mm-file-name-delete-whitespace', +`mm-file-name-trim-whitespace', +`mm-file-name-collapse-whitespace', +`mm-file-name-replace-whitespace', +`capitalize', `downcase', `upcase', and +`upcase-initials'.") + +(defvar mm-path-name-rewrite-functions nil + "*List of functions for rewriting the full file names of MIME parts. +This is used when viewing parts externally, and is meant for +transforming the absolute name so that non-compliant programs can find +the file where it's saved. + +Each function takes a file name as input and returns a file name.") -(defvar mm-encoded-word-regexp - (concat "=\\?\\(" mm-charset-regexp "\\)\\?\\(B\\|Q\\)\\?" - "\\([!->@-~]+\\)\\?=")) +(defvar mm-file-name-replace-whitespace nil + "String used for replacing whitespace characters; default is `\"_\"'.") -(defun mm-decode-words-region (start end) - "Decode MIME-encoded words in region between START and END." - (interactive "r") +(defcustom mm-default-directory nil + "The default directory where mm will save files. +If not set, `default-directory' will be used." + :type '(choice directory (const :tag "Default" nil)) + :group 'mime-display) + +(defcustom mm-external-terminal-program "xterm" + "The program to start an external terminal." + :type 'string + :group 'mime-display) + +;;; Internal variables. + +(defvar mm-last-shell-command "") +(defvar mm-content-id-alist nil) +(defvar mm-postponed-undisplay-list nil) + +;; According to RFC2046, in particular, in a digest, the default +;; Content-Type value for a body part is changed from "text/plain" to +;; "message/rfc822". +(defvar mm-dissect-default-type "text/plain") + +(autoload 'mml2015-verify "mml2015") +(autoload 'mml2015-verify-test "mml2015") +(autoload 'mml-smime-verify "mml-smime") +(autoload 'mml-smime-verify-test "mml-smime") + +(defvar mm-verify-function-alist + '(("application/pgp-signature" mml2015-verify "PGP" mml2015-verify-test) + ("application/x-gnus-pgp-signature" mm-uu-pgp-signed-extract-1 "PGP" + mm-uu-pgp-signed-test) + ("application/pkcs7-signature" mml-smime-verify "S/MIME" + mml-smime-verify-test) + ("application/x-pkcs7-signature" mml-smime-verify "S/MIME" + mml-smime-verify-test))) + +(defcustom mm-verify-option 'never + "Option of verifying signed parts. +`never', not verify; `always', always verify; +`known', only verify known protocols. Otherwise, ask user." + :type '(choice (item always) + (item never) + (item :tag "only known protocols" known) + (item :tag "ask" nil)) + :group 'mime-security) + +(autoload 'mml2015-decrypt "mml2015") +(autoload 'mml2015-decrypt-test "mml2015") + +(defvar mm-decrypt-function-alist + '(("application/pgp-encrypted" mml2015-decrypt "PGP" mml2015-decrypt-test) + ("application/x-gnus-pgp-encrypted" mm-uu-pgp-encrypted-extract-1 "PGP" + mm-uu-pgp-encrypted-test))) + +(defcustom mm-decrypt-option nil + "Option of decrypting encrypted parts. +`never', not decrypt; `always', always decrypt; +`known', only decrypt known protocols. Otherwise, ask user." + :type '(choice (item always) + (item never) + (item :tag "only known protocols" known) + (item :tag "ask" nil)) + :group 'mime-security) + +(defvar mm-viewer-completion-map + (let ((map (make-sparse-keymap 'mm-viewer-completion-map))) + (set-keymap-parent map minibuffer-local-completion-map) + map) + "Keymap for input viewer with completion.") + +;; Should we bind other key to minibuffer-complete-word? +(define-key mm-viewer-completion-map " " 'self-insert-command) + +(defvar mm-viewer-completion-map + (let ((map (make-sparse-keymap 'mm-viewer-completion-map))) + (set-keymap-parent map minibuffer-local-completion-map) + map) + "Keymap for input viewer with completion.") + +;; Should we bind other key to minibuffer-complete-word? +(define-key mm-viewer-completion-map " " 'self-insert-command) + +;;; The functions. + +(defun mm-alist-to-plist (alist) + "Convert association list ALIST into the equivalent property-list form. +The plist is returned. This converts from + +\((a . 1) (b . 2) (c . 3)) + +into + +\(a 1 b 2 c 3) + +The original alist is not modified. See also `destructive-alist-to-plist'." + (let (plist) + (while alist + (let ((el (car alist))) + (setq plist (cons (cdr el) (cons (car el) plist)))) + (setq alist (cdr alist))) + (nreverse plist))) + +(defun mm-keep-viewer-alive-p (handle) + "Say whether external viewer for HANDLE should stay alive." + (let ((types mm-keep-viewer-alive-types) + (type (mm-handle-media-type handle)) + ty) + (catch 'found + (while (setq ty (pop types)) + (when (string-match ty type) + (throw 'found t)))))) + +(defun mm-handle-set-external-undisplayer (handle function) + "Set the undisplayer for HANDLE to FUNCTION. +Postpone undisplaying of viewers for types in +`mm-keep-viewer-alive-types'." + (if (mm-keep-viewer-alive-p handle) + (let ((new-handle (copy-sequence handle))) + (mm-handle-set-undisplayer new-handle function) + (mm-handle-set-undisplayer handle nil) + (push new-handle mm-postponed-undisplay-list)) + (mm-handle-set-undisplayer handle function))) + +(defun mm-destroy-postponed-undisplay-list () + (when mm-postponed-undisplay-list + (message "Destroying external MIME viewers") + (mm-destroy-parts mm-postponed-undisplay-list))) + +(defun mm-dissect-buffer (&optional no-strict-mime loose-mime) + "Dissect the current buffer and return a list of MIME handles." (save-excursion - (save-restriction - (narrow-to-region start end) - (goto-char (point-min)) - ;; Remove whitespace between encoded words. - (while (re-search-forward - (concat "\\(" mm-encoded-word-regexp "\\)" - "\\(\n?[ \t]\\)+" - "\\(" mm-encoded-word-regexp "\\)") - nil t) - (delete-region (goto-char (match-end 1)) (match-beginning 6))) - ;; Decode the encoded words. + (let (ct ctl type subtype cte cd description id result from) + (save-restriction + (mail-narrow-to-head) + (when (or no-strict-mime + loose-mime + (mail-fetch-field "mime-version")) + (setq ct (mail-fetch-field "content-type") + ctl (ignore-errors (mail-header-parse-content-type ct)) + cte (mail-fetch-field "content-transfer-encoding") + cd (mail-fetch-field "content-disposition") + description (mail-fetch-field "content-description") + from (mail-fetch-field "from") + id (mail-fetch-field "content-id")) + ;; FIXME: In some circumstances, this code is running within + ;; an unibyte macro. mail-extract-address-components + ;; creates unibyte buffers. This `if', though not a perfect + ;; solution, avoids most of them. + (if from + (setq from (cadr (mail-extract-address-components from)))))) + (when cte + (setq cte (mail-header-strip cte))) + (if (or (not ctl) + (not (string-match "/" (car ctl)))) + (mm-dissect-singlepart + (list mm-dissect-default-type) + (and cte (intern (downcase (mail-header-remove-whitespace + (mail-header-remove-comments + cte))))) + no-strict-mime + (and cd (ignore-errors (mail-header-parse-content-disposition cd))) + description) + (setq type (split-string (car ctl) "/")) + (setq subtype (cadr type) + type (pop type)) + (setq + result + (cond + ((equal type "multipart") + (let ((mm-dissect-default-type (if (equal subtype "digest") + "message/rfc822" + "text/plain"))) + (add-text-properties 0 (length (car ctl)) + (mm-alist-to-plist (cdr ctl)) (car ctl)) + + ;; what really needs to be done here is a way to link a + ;; MIME handle back to it's parent MIME handle (in a multilevel + ;; MIME article). That would probably require changing + ;; the mm-handle API so we simply store the multipart buffert + ;; name as a text property of the "multipart/whatever" string. + (add-text-properties 0 (length (car ctl)) + (list 'buffer (mm-copy-to-buffer)) + (car ctl)) + (add-text-properties 0 (length (car ctl)) + (list 'from from) + (car ctl)) + (cons (car ctl) (mm-dissect-multipart ctl)))) + (t + (mm-possibly-verify-or-decrypt + (mm-dissect-singlepart + ctl + (and cte (intern (downcase (mail-header-remove-whitespace + (mail-header-remove-comments + cte))))) + no-strict-mime + (and cd (ignore-errors + (mail-header-parse-content-disposition cd))) + description id) + ctl)))) + (when id + (when (string-match " *<\\(.*\\)> *" id) + (setq id (match-string 1 id))) + (push (cons id result) mm-content-id-alist)) + result)))) + +(defun mm-dissect-singlepart (ctl cte &optional force cdl description id) + (when (or force + (if (equal "text/plain" (car ctl)) + (assoc 'format ctl) + t)) + (mm-make-handle + (mm-copy-to-buffer) ctl cte nil cdl description nil id))) + +(defun mm-dissect-multipart (ctl) + (goto-char (point-min)) + (let* ((boundary (concat "\n--" (mail-content-type-get ctl 'boundary))) + (close-delimiter (concat (regexp-quote boundary) "--[ \t]*$")) + start parts + (end (save-excursion + (goto-char (point-max)) + (if (re-search-backward close-delimiter nil t) + (match-beginning 0) + (point-max))))) + (setq boundary (concat (regexp-quote boundary) "[ \t]*$")) + (while (and (< (point) end) (re-search-forward boundary end t)) + (goto-char (match-beginning 0)) + (when start + (save-excursion + (save-restriction + (narrow-to-region start (point)) + (setq parts (nconc (list (mm-dissect-buffer t)) parts))))) + (end-of-line 2) + (or (looking-at boundary) + (forward-line 1)) + (setq start (point))) + (when (and start (< start end)) + (save-excursion + (save-restriction + (narrow-to-region start end) + (setq parts (nconc (list (mm-dissect-buffer t)) parts))))) + (mm-possibly-verify-or-decrypt (nreverse parts) ctl))) + +(defun mm-copy-to-buffer () + "Copy the contents of the current buffer to a fresh buffer." + (save-excursion + (let ((flag enable-multibyte-characters) + (new-buffer (generate-new-buffer " *mm*"))) (goto-char (point-min)) - (while (re-search-forward mm-encoded-word-regexp nil t) - (insert (mm-decode-word - (prog1 - (match-string 0) - (delete-region (match-beginning 0) (match-end 0))))))))) - -(defun mm-decode-words-string (string) - "Decode the quoted-printable-encoded STRING and return the results." - (with-temp-buffer - (insert string) - (inline - (mm-decode-words-region (point-min) (point-max))) - (buffer-string))) - -(defun mm-decode-word (word) - "Decode WORD and return it if it is an encoded word. -Return WORD if not." - (if (not (string-match mm-encoded-word-regexp word)) - word - (or - (condition-case nil - (mm-decode-text - (match-string 1 word) - (upcase (match-string 2 word)) - (match-string 3 word)) - (error word)) - word))) + (search-forward-regexp "^\n" nil t) + (save-restriction + (narrow-to-region (point) (point-max)) + (when flag + (set-buffer-multibyte nil)) + (copy-to-buffer new-buffer (point-min) (point-max)) + (when flag + (set-buffer-multibyte t))) + new-buffer))) -(eval-and-compile - (if (fboundp 'decode-coding-string) - (fset 'mm-decode-coding-string 'decode-coding-string) - (fset 'mm-decode-coding-string (lambda (s a) s)))) +(defun mm-display-parts (handle &optional no-default) + (if (stringp (car handle)) + (mapcar 'mm-display-parts (cdr handle)) + (if (bufferp (car handle)) + (save-restriction + (narrow-to-region (point) (point)) + (mm-display-part handle) + (goto-char (point-max))) + (mapcar 'mm-display-parts handle)))) -(eval-and-compile - (if (fboundp 'coding-system-list) - (fset 'mm-coding-system-list 'coding-system-list) - (fset 'mm-coding-system-list 'ignore))) - -(defun mm-decode-text (charset encoding string) - "Decode STRING as an encoded text. -Valid ENCODINGs are \"B\" and \"Q\". -If your Emacs implementation can't decode CHARSET, it returns nil." - (let ((cs (mm-charset-to-coding-system charset))) - (when cs - (mm-decode-coding-string - (cond - ((equal "B" encoding) - (base64-decode string)) - ((equal "Q" encoding) - (quoted-printable-decode-string - (nnheader-replace-chars-in-string string ?_ ? ))) - (t (error "Invalid encoding: %s" encoding))) - cs)))) - -(defvar mm-charset-coding-system-alist - (let ((rest - '((us-ascii . iso-8859-1) - (gb2312 . cn-gb-2312) - (iso-2022-jp-2 . iso-2022-7bit-ss2) - (x-ctext . ctext))) - (systems (mm-coding-system-list)) - dest) - (while rest - (let ((pair (car rest))) - (unless (memq (car pair) systems) - (setq dest (cons pair dest)))) - (setq rest (cdr rest))) - dest) - "Charset/coding system alist.") - -(defun mm-charset-to-coding-system (charset &optional lbt) - "Return coding-system corresponding to CHARSET. -CHARSET is a symbol naming a MIME charset. -If optional argument LBT (`unix', `dos' or `mac') is specified, it is -used as the line break code type of the coding system." - (when (stringp charset) - (setq charset (intern (downcase charset)))) - (setq charset - (or (cdr (assq charset mm-charset-coding-system-alist)) - charset)) - (when lbt - (setq charset (intern (format "%s-%s" charset lbt)))) +(defun mm-display-part (handle &optional no-default) + "Display the MIME part represented by HANDLE. +Returns nil if the part is removed; inline if displayed inline; +external if displayed external." + (save-excursion + (mailcap-parse-mailcaps) + (if (mm-handle-displayed-p handle) + (mm-remove-part handle) + (let* ((type (mm-handle-media-type handle)) + (method (mailcap-mime-info type))) + (if (and (mm-inlinable-p handle) + (mm-inlined-p handle)) + (progn + (forward-line 1) + (mm-display-inline handle) + 'inline) + (when (or method + (not no-default)) + (if (and (not method) + (equal "text" (car (split-string type)))) + (progn + (forward-line 1) + (mm-insert-inline handle (mm-get-part handle)) + 'inline) + (mm-display-external + handle (or method 'mailcap-save-binary-file))))))))) + +(defun mm-display-external (handle method) + "Display HANDLE using METHOD." + (let ((outbuf (current-buffer))) + (mm-with-unibyte-buffer + (if (functionp method) + (let ((cur (current-buffer))) + (if (eq method 'mailcap-save-binary-file) + (progn + (set-buffer (generate-new-buffer " *mm*")) + (setq method nil)) + (mm-insert-part handle) + (let ((win (get-buffer-window cur t))) + (when win + (select-window win))) + (switch-to-buffer (generate-new-buffer " *mm*"))) + (buffer-disable-undo) + (mm-set-buffer-file-coding-system mm-binary-coding-system) + (insert-buffer-substring cur) + (goto-char (point-min)) + (message "Viewing with %s" method) + (let ((mm (current-buffer)) + (non-viewer (assq 'non-viewer + (mailcap-mime-info + (mm-handle-media-type handle) t)))) + (unwind-protect + (if method + (funcall method) + (mm-save-part handle)) + (when (and (not non-viewer) + method) + (mm-handle-set-undisplayer handle mm))))) + ;; The function is a string to be executed. + (mm-insert-part handle) + (let* ((dir (mm-make-temp-file + (expand-file-name "emm." mm-tmp-directory) 'dir)) + (filename (or + (mail-content-type-get + (mm-handle-disposition handle) 'filename) + (mail-content-type-get + (mm-handle-type handle) 'name))) + (mime-info (mailcap-mime-info + (mm-handle-media-type handle) t)) + (needsterm (or (assoc "needsterm" mime-info) + (assoc "needsterminal" mime-info))) + (copiousoutput (assoc "copiousoutput" mime-info)) + file buffer) + ;; We create a private sub-directory where we store our files. + (set-file-modes dir 448) + (if filename + (setq file (expand-file-name + (gnus-map-function mm-file-name-rewrite-functions + (file-name-nondirectory filename)) + dir)) + (setq file (mm-make-temp-file (expand-file-name "mm." dir)))) + (let ((coding-system-for-write mm-binary-coding-system)) + (write-region (point-min) (point-max) file nil 'nomesg)) + (message "Viewing with %s" method) + (cond + (needsterm + (let ((command (mm-mailcap-command + method file (mm-handle-type handle)))) + (unwind-protect + (if window-system + (start-process "*display*" nil + mm-external-terminal-program + "-e" shell-file-name + shell-command-switch command) + (require 'term) + (require 'gnus-win) + (set-buffer + (setq buffer + (make-term "display" + shell-file-name + nil + shell-command-switch command))) + (term-mode) + (term-char-mode) + (set-process-sentinel + (get-buffer-process buffer) + `(lambda (process state) + (if (eq 'exit (process-status process)) + (gnus-configure-windows + ',gnus-current-window-configuration)))) + (gnus-configure-windows 'display-term)) + (mm-handle-set-external-undisplayer handle (cons file buffer))) + (message "Displaying %s..." command)) + 'external) + (copiousoutput + (with-current-buffer outbuf + (forward-line 1) + (mm-insert-inline + handle + (unwind-protect + (progn + (call-process shell-file-name nil + (setq buffer + (generate-new-buffer " *mm*")) + nil + shell-command-switch + (mm-mailcap-command + method file (mm-handle-type handle))) + (if (buffer-live-p buffer) + (save-excursion + (set-buffer buffer) + (buffer-string)))) + (progn + (ignore-errors (delete-file file)) + (ignore-errors (delete-directory + (file-name-directory file))) + (ignore-errors (kill-buffer buffer)))))) + 'inline) + (t + (let ((command (mm-mailcap-command + method file (mm-handle-type handle)))) + (unwind-protect + (start-process "*display*" + (setq buffer + (generate-new-buffer " *mm*")) + shell-file-name + shell-command-switch command) + (mm-handle-set-external-undisplayer + handle (cons file buffer))) + (message "Displaying %s..." command)) + 'external))))))) + +(defun mm-mailcap-command (method file type-list) + (let ((ctl (cdr type-list)) + (beg 0) + (uses-stdin t) + out sub total) + (while (string-match "%{\\([^}]+\\)}\\|'%s'\\|\"%s\"\\|%s\\|%t\\|%%" + method beg) + (push (substring method beg (match-beginning 0)) out) + (setq beg (match-end 0) + total (match-string 0 method) + sub (match-string 1 method)) + (cond + ((string= total "%%") + (push "%" out)) + ((or (string= total "%s") + ;; We do our own quoting. + (string= total "'%s'") + (string= total "\"%s\"")) + (setq uses-stdin nil) + (push (mm-quote-arg + (gnus-map-function mm-path-name-rewrite-functions file)) out)) + ((string= total "%t") + (push (mm-quote-arg (car type-list)) out)) + (t + (push (mm-quote-arg (or (cdr (assq (intern sub) ctl)) "")) out)))) + (push (substring method beg (length method)) out) + (when uses-stdin + (push "<" out) + (push (mm-quote-arg + (gnus-map-function mm-path-name-rewrite-functions file)) + out)) + (mapconcat 'identity (nreverse out) ""))) + +(defun mm-remove-parts (handles) + "Remove the displayed MIME parts represented by HANDLES." + (if (and (listp handles) + (bufferp (car handles))) + (mm-remove-part handles) + (let (handle) + (while (setq handle (pop handles)) + (cond + ((stringp handle) + (when (buffer-live-p (get-text-property 0 'buffer handle)) + (kill-buffer (get-text-property 0 'buffer handle)))) + ((and (listp handle) + (stringp (car handle))) + (mm-remove-parts (cdr handle))) + (t + (mm-remove-part handle))))))) + +(defun mm-destroy-parts (handles) + "Remove the displayed MIME parts represented by HANDLES." + (if (and (listp handles) + (bufferp (car handles))) + (mm-destroy-part handles) + (let (handle) + (while (setq handle (pop handles)) + (cond + ((stringp handle) + (when (buffer-live-p (get-text-property 0 'buffer handle)) + (kill-buffer (get-text-property 0 'buffer handle)))) + ((and (listp handle) + (stringp (car handle))) + (mm-destroy-parts handle)) + (t + (mm-destroy-part handle))))))) + +(defun mm-remove-part (handle) + "Remove the displayed MIME part represented by HANDLE." + (when (listp handle) + (let ((object (mm-handle-undisplayer handle))) + (ignore-errors + (cond + ;; Internally displayed part. + ((mm-annotationp object) + (delete-annotation object)) + ((or (functionp object) + (and (listp object) + (eq (car object) 'lambda))) + (funcall object)) + ;; Externally displayed part. + ((consp object) + (ignore-errors (delete-file (car object))) + (ignore-errors (delete-directory (file-name-directory (car object)))) + (ignore-errors (and (cdr object) (kill-buffer (cdr object))))) + ((bufferp object) + (when (buffer-live-p object) + (kill-buffer object))))) + (mm-handle-set-undisplayer handle nil)))) + +(defun mm-display-inline (handle) + (let* ((type (mm-handle-media-type handle)) + (function (cadr (mm-assoc-string-match mm-inline-media-tests type)))) + (funcall function handle) + (goto-char (point-min)))) + +(defun mm-assoc-string-match (alist type) + (dolist (elem alist) + (when (string-match (car elem) type) + (return elem)))) + +(defun mm-automatic-display-p (handle) + "Say whether the user wants HANDLE to be displayed automatically." + (let ((methods mm-automatic-display) + (type (mm-handle-media-type handle)) + method result) + (while (setq method (pop methods)) + (when (and (not (mm-inline-override-p handle)) + (string-match method type)) + (setq result t + methods nil))) + result)) + +(defun mm-inlinable-p (handle) + "Say whether HANDLE can be displayed inline." + (let ((alist mm-inline-media-tests) + (type (mm-handle-media-type handle)) + test) + (while alist + (when (string-match (caar alist) type) + (setq test (caddar alist) + alist nil) + (setq test (funcall test handle))) + (pop alist)) + test)) + +(defun mm-inlined-p (handle) + "Say whether the user wants HANDLE to be displayed inline." + (let ((methods mm-inlined-types) + (type (mm-handle-media-type handle)) + method result) + (while (setq method (pop methods)) + (when (and (not (mm-inline-override-p handle)) + (string-match method type)) + (setq result t + methods nil))) + result)) + +(defun mm-attachment-override-p (handle) + "Say whether HANDLE should have attachment behavior overridden." + (let ((types mm-attachment-override-types) + (type (mm-handle-media-type handle)) + ty) + (catch 'found + (while (setq ty (pop types)) + (when (and (string-match ty type) + (mm-inlinable-p handle)) + (throw 'found t)))))) + +(defun mm-inline-override-p (handle) + "Say whether HANDLE should have inline behavior overridden." + (let ((types mm-inline-override-types) + (type (mm-handle-media-type handle)) + ty) + (catch 'found + (while (setq ty (pop types)) + (when (string-match ty type) + (throw 'found t)))))) + +(defun mm-automatic-external-display-p (type) + "Return the user-defined method for TYPE." + (let ((methods mm-automatic-external-display) + method result) + (while (setq method (pop methods)) + (when (string-match method type) + (setq result t + methods nil))) + result)) + +(defun mm-destroy-part (handle) + "Destroy the data structures connected to HANDLE." + (when (listp handle) + (mm-remove-part handle) + (when (buffer-live-p (mm-handle-buffer handle)) + (kill-buffer (mm-handle-buffer handle))))) + +(defun mm-handle-displayed-p (handle) + "Say whether HANDLE is displayed or not." + (mm-handle-undisplayer handle)) + +;;; +;;; Functions for outputting parts +;;; + +(defun mm-get-part (handle) + "Return the contents of HANDLE as a string." + (mm-with-unibyte-buffer + (insert (with-current-buffer (mm-handle-buffer handle) + (mm-with-unibyte-current-buffer + (buffer-string)))) + (mm-decode-content-transfer-encoding + (mm-handle-encoding handle) + (mm-handle-media-type handle)) + (buffer-string))) + +(defun mm-insert-part (handle) + "Insert the contents of HANDLE in the current buffer." + (let ((cur (current-buffer))) + (save-excursion + (if (member (mm-handle-media-supertype handle) '("text" "message")) + (with-temp-buffer + (insert-buffer-substring (mm-handle-buffer handle)) + (prog1 + (mm-decode-content-transfer-encoding + (mm-handle-encoding handle) + (mm-handle-media-type handle)) + (let ((temp (current-buffer))) + (set-buffer cur) + (insert-buffer-substring temp)))) + (mm-with-unibyte-buffer + (insert-buffer-substring (mm-handle-buffer handle)) + (prog1 + (mm-decode-content-transfer-encoding + (mm-handle-encoding handle) + (mm-handle-media-type handle)) + (let ((temp (current-buffer))) + (set-buffer cur) + (insert-buffer-substring temp)))))))) + +(defun mm-file-name-delete-whitespace (file-name) + "Remove all whitespace characters from FILE-NAME." + (while (string-match "\\s-+" file-name) + (setq file-name (replace-match "" t t file-name))) + file-name) + +(defun mm-file-name-trim-whitespace (file-name) + "Remove leading and trailing whitespace characters from FILE-NAME." + (when (string-match "\\`\\s-+" file-name) + (setq file-name (substring file-name (match-end 0)))) + (when (string-match "\\s-+\\'" file-name) + (setq file-name (substring file-name 0 (match-beginning 0)))) + file-name) + +(defun mm-file-name-collapse-whitespace (file-name) + "Collapse multiple whitespace characters in FILE-NAME." + (while (string-match "\\s-\\s-+" file-name) + (setq file-name (replace-match " " t t file-name))) + file-name) + +(defun mm-file-name-replace-whitespace (file-name) + "Replace whitespace characters in FILE-NAME with underscores. +Set the option `mm-file-name-replace-whitespace' to any other +string if you do not like underscores." + (let ((s (or mm-file-name-replace-whitespace "_"))) + (while (string-match "\\s-" file-name) + (setq file-name (replace-match s t t file-name)))) + file-name) + +(defun mm-save-part (handle) + "Write HANDLE to a file." + (let* ((name (mail-content-type-get (mm-handle-type handle) 'name)) + (filename (mail-content-type-get + (mm-handle-disposition handle) 'filename)) + file) + (when filename + (setq filename (gnus-map-function mm-file-name-rewrite-functions + (file-name-nondirectory filename)))) + (setq file + (read-file-name "Save MIME part to: " + (or mm-default-directory default-directory) + nil nil (or filename name ""))) + (setq mm-default-directory (file-name-directory file)) + (and (or (not (file-exists-p file)) + (yes-or-no-p (format "File %s already exists; overwrite? " + file))) + (progn + (mm-save-part-to-file handle file) + file)))) + +(defun mm-save-part-to-file (handle file) + (mm-with-unibyte-buffer + (mm-insert-part handle) + (let ((coding-system-for-write 'binary) + ;; Don't re-compress .gz & al. Arguably we should make + ;; `file-name-handler-alist' nil, but that would chop + ;; ange-ftp, which is reasonable to use here. + (inhibit-file-name-operation 'write-region) + (inhibit-file-name-handlers + (cons 'jka-compr-handler inhibit-file-name-handlers))) + (write-region (point-min) (point-max) file)))) + +(defun mm-pipe-part (handle) + "Pipe HANDLE to a process." + (let* ((name (mail-content-type-get (mm-handle-type handle) 'name)) + (command + (read-string "Shell command on MIME part: " mm-last-shell-command))) + (mm-with-unibyte-buffer + (mm-insert-part handle) + (let ((coding-system-for-write 'binary)) + (shell-command-on-region (point-min) (point-max) command nil))))) + +(defun mm-interactively-view-part (handle) + "Display HANDLE using METHOD." + (let* ((type (mm-handle-media-type handle)) + (methods + (mapcar (lambda (i) (list (cdr (assoc 'viewer i)))) + (mailcap-mime-info type 'all))) + (method (let ((minibuffer-local-completion-map + mm-viewer-completion-map)) + (completing-read "Viewer: " methods)))) + (when (string= method "") + (error "No method given")) + (if (string-match "^[^% \t]+$" method) + (setq method (concat method " %s"))) + (mm-display-external handle method))) + +(defun mm-preferred-alternative (handles &optional preferred) + "Say which of HANDLES are preferred." + (let ((prec (if preferred (list preferred) + (mm-preferred-alternative-precedence handles))) + p h result type handle) + (while (setq p (pop prec)) + (setq h handles) + (while h + (setq handle (car h)) + (setq type (mm-handle-media-type handle)) + (when (and (equal p type) + (mm-automatic-display-p handle) + (or (stringp (car handle)) + (not (mm-handle-disposition handle)) + (equal (car (mm-handle-disposition handle)) + "inline"))) + (setq result handle + h nil + prec nil)) + (pop h))) + result)) + +(defun mm-preferred-alternative-precedence (handles) + "Return the precedence based on HANDLES and `mm-discouraged-alternatives'." + (let ((seq (nreverse (mapcar #'mm-handle-media-type + handles)))) + (dolist (disc (reverse mm-discouraged-alternatives)) + (dolist (elem (copy-sequence seq)) + (when (string-match disc elem) + (setq seq (nconc (delete elem seq) (list elem)))))) + seq)) + +(defun mm-get-content-id (id) + "Return the handle(s) referred to by ID." + (cdr (assoc id mm-content-id-alist))) + +(defconst mm-image-type-regexps + '(("/\\*.*XPM.\\*/" . xpm) + ("P[1-6]" . pbm) + ("GIF8" . gif) + ("\377\330" . jpeg) + ("\211PNG\r\n" . png) + ("#define" . xbm) + ("\\(MM\0\\*\\)\\|\\(II\\*\0\\)" . tiff) + ("%!PS" . postscript)) + "Alist of (REGEXP . IMAGE-TYPE) pairs used to auto-detect image types. +When the first bytes of an image file match REGEXP, it is assumed to +be of image type IMAGE-TYPE.") + +;; Steal from image.el. image-type-from-data suffers multi-line matching bug. +(defun mm-image-type-from-buffer () + "Determine the image type from data in the current buffer. +Value is a symbol specifying the image type or nil if type cannot +be determined." + (let ((types mm-image-type-regexps) + type) + (goto-char (point-min)) + (while (and types (null type)) + (let ((regexp (car (car types))) + (image-type (cdr (car types)))) + (when (looking-at regexp) + (setq type image-type)) + (setq types (cdr types)))) + type)) + +(defun mm-get-image (handle) + "Return an image instance based on HANDLE." + (let ((type (mm-handle-media-subtype handle)) + spec) + ;; Allow some common translations. + (setq type + (cond + ((equal type "x-pixmap") + "xpm") + ((equal type "x-xbitmap") + "xbm") + ((equal type "x-portable-bitmap") + "pbm") + (t type))) + (or (mm-handle-cache handle) + (mm-with-unibyte-buffer + (mm-insert-part handle) + (prog1 + (setq spec + (ignore-errors + ;; Avoid testing `make-glyph' since W3 may define + ;; a bogus version of it. + (if (fboundp 'create-image) + (create-image (buffer-string) + (or (mm-image-type-from-buffer) + (intern type)) + 'data-p) + (mm-create-image-xemacs type)))) + (mm-handle-set-cache handle spec)))))) + +(defun mm-create-image-xemacs (type) (cond - ;; Running in a non-MULE environment. - ((and (null (mm-coding-system-list)) - (eq charset 'iso-8859-1)) - charset) - ;; Check to see whether we can handle this charset. - ((memq charset (mm-coding-system-list)) - charset) - ;; Nope. + ((equal type "xbm") + ;; xbm images require special handling, since + ;; the only way to create glyphs from these + ;; (without a ton of work) is to write them + ;; out to a file, and then create a file + ;; specifier. + (let ((file (mm-make-temp-file + (expand-file-name "emm.xbm" + mm-tmp-directory)))) + (unwind-protect + (progn + (write-region (point-min) (point-max) file) + (make-glyph (list (cons 'x file)))) + (ignore-errors + (delete-file file))))) + (t + (make-glyph + (vector + (or (mm-image-type-from-buffer) + (intern type)) + :data (buffer-string)))))) + +(defun mm-image-fit-p (handle) + "Say whether the image in HANDLE will fit the current window." + (let ((image (mm-get-image handle))) + (if (fboundp 'glyph-width) + ;; XEmacs' glyphs can actually tell us about their width, so + ;; lets be nice and smart about them. + (or mm-inline-large-images + (and (< (glyph-width image) (window-pixel-width)) + (< (glyph-height image) (window-pixel-height)))) + (let* ((size (image-size image)) + (w (car size)) + (h (cdr size))) + (or mm-inline-large-images + (and (< h (1- (window-height))) ; Don't include mode line. + (< w (window-width)))))))) + +(defun mm-valid-image-format-p (format) + "Say whether FORMAT can be displayed natively by Emacs." + (cond + ;; Handle XEmacs + ((fboundp 'valid-image-instantiator-format-p) + (valid-image-instantiator-format-p format)) + ;; Handle Emacs 21 + ((fboundp 'image-type-available-p) + (and (display-graphic-p) + (image-type-available-p format))) + ;; Nobody else can do images yet. (t nil))) +(defun mm-valid-and-fit-image-p (format handle) + "Say whether FORMAT can be displayed natively and HANDLE fits the window." + (and (mm-valid-image-format-p format) + (mm-image-fit-p handle))) + +(defun mm-find-part-by-type (handles type &optional notp recursive) + "Search in HANDLES for part with TYPE. +If NOTP, returns first non-matching part. +If RECURSIVE, search recursively." + (let (handle) + (while handles + (if (and recursive (stringp (caar handles))) + (if (setq handle (mm-find-part-by-type (cdar handles) type + notp recursive)) + (setq handles nil)) + (if (if notp + (not (equal (mm-handle-media-type (car handles)) type)) + (equal (mm-handle-media-type (car handles)) type)) + (setq handle (car handles) + handles nil))) + (setq handles (cdr handles))) + handle)) + +(defun mm-find-raw-part-by-type (ctl type &optional notp) + (goto-char (point-min)) + (let* ((boundary (concat "--" (mm-handle-multipart-ctl-parameter ctl + 'boundary))) + (close-delimiter (concat "^" (regexp-quote boundary) "--[ \t]*$")) + start + (end (save-excursion + (goto-char (point-max)) + (if (re-search-backward close-delimiter nil t) + (match-beginning 0) + (point-max)))) + result) + (setq boundary (concat "^" (regexp-quote boundary) "[ \t]*$")) + (while (and (not result) + (re-search-forward boundary end t)) + (goto-char (match-beginning 0)) + (when start + (save-excursion + (save-restriction + (narrow-to-region start (1- (point))) + (when (let ((ctl (ignore-errors + (mail-header-parse-content-type + (mail-fetch-field "content-type"))))) + (if notp + (not (equal (car ctl) type)) + (equal (car ctl) type))) + (setq result (buffer-string)))))) + (forward-line 1) + (setq start (point))) + (when (and (not result) start) + (save-excursion + (save-restriction + (narrow-to-region start end) + (when (let ((ctl (ignore-errors + (mail-header-parse-content-type + (mail-fetch-field "content-type"))))) + (if notp + (not (equal (car ctl) type)) + (equal (car ctl) type))) + (setq result (buffer-string)))))) + result)) + +(defvar mm-security-handle nil) + +(defsubst mm-set-handle-multipart-parameter (handle parameter value) + ;; HANDLE could be a CTL. + (when handle + (put-text-property 0 (length (car handle)) parameter value + (car handle)))) + +(defun mm-possibly-verify-or-decrypt (parts ctl) + (let ((type (car ctl)) + (subtype (cadr (split-string (car ctl) "/"))) + (mm-security-handle ctl) ;; (car CTL) is the type. + protocol func functest) + (cond + ((or (equal type "application/x-pkcs7-mime") + (equal type "application/pkcs7-mime")) + (with-temp-buffer + (when (and (cond + ((eq mm-decrypt-option 'never) nil) + ((eq mm-decrypt-option 'always) t) + ((eq mm-decrypt-option 'known) t) + (t (y-or-n-p + (format "Decrypt (S/MIME) part? ")))) + (mm-view-pkcs7 parts)) + (setq parts (mm-dissect-buffer t))))) + ((equal subtype "signed") + (unless (and (setq protocol + (mm-handle-multipart-ctl-parameter ctl 'protocol)) + (not (equal protocol "multipart/mixed"))) + ;; The message is broken or draft-ietf-openpgp-multsig-01. + (let ((protocols mm-verify-function-alist)) + (while protocols + (if (and (or (not (setq functest (nth 3 (car protocols)))) + (funcall functest parts ctl)) + (mm-find-part-by-type parts (caar protocols) nil t)) + (setq protocol (caar protocols) + protocols nil) + (setq protocols (cdr protocols)))))) + (setq func (nth 1 (assoc protocol mm-verify-function-alist))) + (when (cond + ((eq mm-verify-option 'never) nil) + ((eq mm-verify-option 'always) t) + ((eq mm-verify-option 'known) + (and func + (or (not (setq functest + (nth 3 (assoc protocol + mm-verify-function-alist)))) + (funcall functest parts ctl)))) + (t + (y-or-n-p + (format "Verify signed (%s) part? " + (or (nth 2 (assoc protocol mm-verify-function-alist)) + (format "protocol=%s" protocol)))))) + (save-excursion + (if func + (funcall func parts ctl) + (mm-set-handle-multipart-parameter + mm-security-handle 'gnus-details + (format "Unknown sign protocol (%s)" protocol)))))) + ((equal subtype "encrypted") + (unless (setq protocol + (mm-handle-multipart-ctl-parameter ctl 'protocol)) + ;; The message is broken. + (let ((parts parts)) + (while parts + (if (assoc (mm-handle-media-type (car parts)) + mm-decrypt-function-alist) + (setq protocol (mm-handle-media-type (car parts)) + parts nil) + (setq parts (cdr parts)))))) + (setq func (nth 1 (assoc protocol mm-decrypt-function-alist))) + (when (cond + ((eq mm-decrypt-option 'never) nil) + ((eq mm-decrypt-option 'always) t) + ((eq mm-decrypt-option 'known) + (and func + (or (not (setq functest + (nth 3 (assoc protocol + mm-decrypt-function-alist)))) + (funcall functest parts ctl)))) + (t + (y-or-n-p + (format "Decrypt (%s) part? " + (or (nth 2 (assoc protocol mm-decrypt-function-alist)) + (format "protocol=%s" protocol)))))) + (save-excursion + (if func + (setq parts (funcall func parts ctl)) + (mm-set-handle-multipart-parameter + mm-security-handle 'gnus-details + (format "Unknown encrypt protocol (%s)" protocol)))))) + (t nil)) + parts)) + +(defun mm-multiple-handles (handles) + (and (listp (car handles)) + (> (length handles) 1))) + +(defun mm-merge-handles (handles1 handles2) + (append + (if (listp (car handles1)) + handles1 + (list handles1)) + (if (listp (car handles2)) + handles2 + (list handles2)))) + +(defun mm-readable-p (handle) + "Say whether the content of HANDLE is readable." + (and (< (with-current-buffer (mm-handle-buffer handle) + (buffer-size)) 10000) + (mm-with-unibyte-buffer + (mm-insert-part handle) + (and (eq (mm-body-7-or-8) '7bit) + (not (mm-long-lines-p 76)))))) + (provide 'mm-decode) -;; qp.el ends here +;;; mm-decode.el ends here