-;;; mailcap.el --- Functions for displaying MIME parts
-;; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+;;; mailcap.el --- MIME media types configuration
+;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003
+;; Free Software Foundation, Inc.
;; Author: William M. Perry <wmperry@aventail.com>
;; Lars Magne Ingebrigtsen <larsi@gnus.org>
-;; Keywords: news, mail
+;; Keywords: news, mail, multimedia
;; This file is part of GNU Emacs.
;;; Commentary:
+;; Provides configuration of MIME media types from directly from Lisp
+;; and via the usual mailcap mechanism (RFC 1524). Deals with
+;; mime.types similarly.
+
;;; Code:
(eval-when-compile (require 'cl))
(require 'mail-parse)
(require 'mm-util)
+(defgroup mailcap nil
+ "Definition of viewers for MIME types."
+ :version "21.1"
+ :group 'mime)
+
(defvar mailcap-parse-args-syntax-table
(let ((table (copy-syntax-table emacs-lisp-mode-syntax-table)))
(modify-syntax-entry ?' "\"" table)
(modify-syntax-entry ?{ "(" table)
(modify-syntax-entry ?} ")" table)
table)
- "A syntax table for parsing sgml attributes.")
-
+ "A syntax table for parsing SGML attributes.")
+
+(eval-and-compile
+ (when (featurep 'xemacs)
+ (condition-case nil
+ (require 'lpr)
+ (error nil))))
+
+(defvar mailcap-print-command
+ (mapconcat 'identity
+ (cons (if (boundp 'lpr-command)
+ lpr-command
+ "lpr")
+ (when (boundp 'lpr-switches)
+ (if (stringp lpr-switches)
+ (list lpr-switches)
+ lpr-switches)))
+ " ")
+ "Shell command (including switches) used to print Postscript files.")
+
+;; Postpone using defcustom for this as it's so big and we essentially
+;; have to have two copies of the data around then. Perhaps just
+;; customize the Lisp viewers and rely on the normal configuration
+;; files for the rest? -- fx
(defvar mailcap-mime-data
- '(("application"
+ `(("application"
+ ("vnd.ms-excel"
+ (viewer . "gnumeric %s")
+ (test . (getenv "DISPLAY"))
+ (type . "application/vnd.ms-excel"))
("x-x509-ca-cert"
(viewer . ssl-view-site-cert)
(test . (fboundp 'ssl-view-site-cert))
(non-viewer . t)
(type . "application/octet-stream"))
("dvi"
- (viewer . "open %s")
- (type . "application/dvi")
- (test . (eq (mm-device-type) 'ns)))
- ("dvi"
- (viewer . "xdvi %s")
- (test . (eq (mm-device-type) 'x))
+ (viewer . "xdvi -safer %s")
+ (test . (eq window-system 'x))
("needsx11")
- (type . "application/dvi"))
+ (type . "application/dvi")
+ ("print" . "dvips -qRP %s"))
("dvi"
(viewer . "dvitty %s")
(test . (not (getenv "DISPLAY")))
- (type . "application/dvi"))
+ (type . "application/dvi")
+ ("print" . "dvips -qRP %s"))
("emacs-lisp"
(viewer . mailcap-maybe-eval)
(type . "application/emacs-lisp"))
+ ("x-emacs-lisp"
+ (viewer . mailcap-maybe-eval)
+ (type . "application/x-emacs-lisp"))
("x-tar"
(viewer . mailcap-save-binary-file)
(non-viewer . t)
(non-viewer . t)
(type . "application/zip")
("copiousoutput"))
+ ;; Prefer free viewers.
+ ("pdf"
+ (viewer . "gv -safer %s")
+ (type . "application/pdf")
+ (test . window-system)
+ ("print" . ,(concat "pdf2ps %s - | " mailcap-print-command)))
+ ("pdf"
+ (viewer . "xpdf %s")
+ (type . "application/pdf")
+ ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
+ (test . (eq window-system 'x)))
("pdf"
(viewer . "acroread %s")
- (type . "application/pdf"))
+ (type . "application/pdf")
+ ("print" . ,(concat "cat %s | acroread -toPostScript | "
+ mailcap-print-command))
+ (test . window-system))
+ ("pdf"
+ (viewer . ,(concat "pdftotext %s -"))
+ (type . "application/pdf")
+ ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
+ ("copiousoutput"))
("postscript"
- (viewer . "open %s")
- (type . "application/postscript")
- (test . (eq (mm-device-type) 'ns)))
+ (viewer . "gv -safer %s")
+ (type . "application/postscript")
+ (test . window-system)
+ ("print" . ,(concat mailcap-print-command " %s"))
+ ("needsx11"))
("postscript"
(viewer . "ghostview -dSAFER %s")
(type . "application/postscript")
- (test . (eq (mm-device-type) 'x))
+ (test . (eq window-system 'x))
+ ("print" . ,(concat mailcap-print-command " %s"))
("needsx11"))
("postscript"
(viewer . "ps2ascii %s")
(type . "application/postscript")
(test . (not (getenv "DISPLAY")))
- ("copiousoutput")))
+ ("print" . ,(concat mailcap-print-command " %s"))
+ ("copiousoutput"))
+ ("sieve"
+ (viewer . sieve-mode)
+ (test . (fboundp 'sieve-mode))
+ (type . "application/sieve"))
+ ("pgp-keys"
+ (viewer . "gpg --import --interactive --verbose")
+ (type . "application/pgp-keys")
+ ("needsterminal")))
("audio"
("x-mpeg"
(viewer . "maplay %s")
(type . "message/rfc822"))
("rfc-*822"
(viewer . view-mode)
- (test . (fboundp 'view-mode))
- (type . "message/rfc822"))
- ("rfc-*822"
- (viewer . fundamental-mode)
(type . "message/rfc822")))
("image"
("x-xwd"
(viewer . "xwud -in %s")
(type . "image/x-xwd")
("compose" . "xwd -frame > %s")
- (test . (eq (mm-device-type) 'x))
+ (test . (eq window-system 'x))
("needsx11"))
("x11-dump"
(viewer . "xwud -in %s")
(type . "image/x-xwd")
("compose" . "xwd -frame > %s")
- (test . (eq (mm-device-type) 'x))
+ (test . (eq window-system 'x))
("needsx11"))
("windowdump"
(viewer . "xwud -in %s")
(type . "image/x-xwd")
("compose" . "xwd -frame > %s")
- (test . (eq (mm-device-type) 'x))
+ (test . (eq window-system 'x))
("needsx11"))
- (".*"
- (viewer . "aopen %s")
- (type . "image/*")
- (test . (eq (mm-device-type) 'ns)))
(".*"
(viewer . "display %s")
(type . "image/*")
- (test . (eq (mm-device-type) 'x))
+ (test . (eq window-system 'x))
("needsx11"))
(".*"
(viewer . "ee %s")
(type . "image/*")
- (test . (eq (mm-device-type) 'x))
+ (test . (eq window-system 'x))
("needsx11")))
("text"
("plain"
(viewer . fundamental-mode)
(type . "text/plain"))
("enriched"
- (viewer . enriched-decode-region)
+ (viewer . enriched-decode)
(test . (fboundp 'enriched-decode))
(type . "text/enriched"))
("html"
("mpeg"
(viewer . "mpeg_play %s")
(type . "video/mpeg")
- (test . (eq (mm-device-type) 'x))
+ (test . (eq window-system 'x))
("needsx11")))
("x-world"
("x-vrml"
(\"plain\" . <info>)))
Where <info> is another assoc list of the various information
-related to the mailcap RFC. This is keyed on the lowercase
+related to the mailcap RFC 1524. This is keyed on the lowercase
attribute name (viewer, test, etc). This looks like:
- ((viewer . viewerinfo)
- (test . testinfo)
- (xxxx . \"string\"))
+ ((viewer . VIEWERINFO)
+ (test . TESTINFO)
+ (xxxx . \"STRING\")
+ FLAG)
-Where viewerinfo specifies how the content-type is viewed. Can be
+Where VIEWERINFO specifies how the content-type is viewed. Can be
a string, in which case it is run through a shell, with
appropriate parameters, or a symbol, in which case the symbol is
-funcall'd, with the buffer as an argument.
-
-testinfo is a list of strings, or nil. If nil, it means the
-viewer specified is always valid. If it is a list of strings,
-these are used to determine whether a viewer passes the 'test' or
-not.")
-
-(defvar mailcap-download-directory nil
- "*Where downloaded files should go by default.")
-
-(defvar mailcap-temporary-directory
- (cond ((fboundp 'temp-directory) (temp-directory))
- ((boundp 'temporary-file-directory) temporary-file-directory)
- ("/tmp/"))
- "*Where temporary files go.")
+`funcall'ed, with the buffer as an argument.
+
+TESTINFO is a test for the viewer's applicability, or nil. If nil, it
+means the viewer is always valid. If it is a Lisp function, it is
+called with a list of items from any extra fields from the
+Content-Type header as argument to return a boolean value for the
+validity. Otherwise, if it is a non-function Lisp symbol or list
+whose car is a symbol, it is `eval'led to yield the validity. If it
+is a string or list of strings, it represents a shell command to run
+to return a true or false shell value for the validity.")
+
+(defcustom mailcap-download-directory nil
+ "*Directory to which `mailcap-save-binary-file' downloads files by default.
+nil means your home directory."
+ :type '(choice (const :tag "Home directory" nil)
+ directory)
+ :group 'mailcap)
+
+(defvar mailcap-poor-system-types
+ '(ms-dos ms-windows windows-nt win32 w32 mswindows)
+ "Systems that don't have a Unix-like directory hierarchy.")
;;;
;;; Utility functions
;;;
-(defun mailcap-generate-unique-filename (&optional fmt)
- "Generate a unique filename in mailcap-temporary-directory."
- (if (not fmt)
- (let ((base (format "mailcap-tmp.%d" (user-real-uid)))
- (fname "")
- (x 0))
- (setq fname (format "%s%d" base x))
- (while (file-exists-p
- (expand-file-name fname mailcap-temporary-directory))
- (setq x (1+ x)
- fname (concat base (int-to-string x))))
- (expand-file-name fname mailcap-temporary-directory))
- (let ((base (concat "mm" (int-to-string (user-real-uid))))
- (fname "")
- (x 0))
- (setq fname (format fmt (concat base (int-to-string x))))
- (while (file-exists-p
- (expand-file-name fname mailcap-temporary-directory))
- (setq x (1+ x)
- fname (format fmt (concat base (int-to-string x)))))
- (expand-file-name fname mailcap-temporary-directory))))
-
(defun mailcap-save-binary-file ()
(goto-char (point-min))
(unwind-protect
(defvar mailcap-maybe-eval-warning
"*** WARNING ***
-This MIME part contains untrusted and possibly harmful content.
+This MIME part contains untrusted and possibly harmful content.
If you evaluate the Emacs Lisp code contained in it, a lot of nasty
things can happen. Please examine the code very carefully before you
instruct Emacs to evaluate it. You can browse the buffer containing
"Text of warning message displayed by `mailcap-maybe-eval'.
Make sure that this text consists only of few text lines. Otherwise,
Gnus might fail to display all of it.")
-
+
(defun mailcap-maybe-eval ()
- "Maybe evaluate a buffer of emacs lisp code."
+ "Maybe evaluate a buffer of Emacs Lisp code."
(let ((lisp-buffer (current-buffer)))
(goto-char (point-min))
(when
"*Warning*"))))
(unwind-protect
(with-current-buffer buffer
- (insert (substitute-command-keys
+ (insert (substitute-command-keys
mailcap-maybe-eval-warning))
(goto-char (point-min))
(display-buffer buffer)
- (yes-or-no-p "This is emacs-lisp code, evaluate it? "))
+ (yes-or-no-p "This is potentially dangerous emacs-lisp code, evaluate it? "))
(kill-buffer buffer))))
(eval-buffer (current-buffer)))
(when (buffer-live-p lisp-buffer)
(cond
(path nil)
((getenv "MAILCAPS") (setq path (getenv "MAILCAPS")))
- ((memq system-type '(ms-dos ms-windows windows-nt))
+ ((memq system-type mailcap-poor-system-types)
(setq path '("~/.mailcap" "~/mail.cap" "~/etc/mail.cap")))
(t (setq path
;; This is per RFC 1524, specifically
"/usr/local/etc/mailcap"))))
(let ((fnames (reverse
(if (stringp path)
- (parse-colon-path path)
+ (delete "" (split-string path path-separator))
path)))
fname)
(while fnames
(setq mailcap-parsed-p t)))
(defun mailcap-parse-mailcap (fname)
- ;; Parse out the mailcap file specified by FNAME
+ "Parse out the mailcap file specified by FNAME."
(let (major ; The major mime type (image/audio/etc)
minor ; The minor mime type (gif, basic, etc)
save-pos ; Misc saved positions used in parsing
(skip-chars-forward " \t")
;;; Got the major/minor chunks, now for the viewers/etc
;;; The first item _must_ be a viewer, according to the
- ;;; RFC for mailcap files (#1343)
+ ;;; RFC for mailcap files (#1524)
(setq viewer "")
- (when (eq (char-after) ?\;)
+ (when (eq (char-after) ?\;)
(forward-char)
(skip-chars-forward " \t")
(setq save-pos (point))
(setq viewer (buffer-substring save-pos (point)))))
(setq save-pos (point))
(end-of-line)
- (unless (equal viewer "")
+ (unless (equal viewer "")
(setq info (nconc (list (cons 'viewer viewer)
(cons 'type (concat major "/"
(if (string= minor ".*")
(beginning-of-line)))))
(defun mailcap-parse-mailcap-extras (st nd)
- ;; Grab all the extra stuff from a mailcap entry
+ "Grab all the extra stuff from a mailcap entry."
(let (
name ; From name=
value ; its value
results)))
(defun mailcap-mailcap-entry-passes-test (info)
- ;; Return t iff a mailcap entry passes its test clause or no test
- ;; clause is present.
- (let (status ; Call-process-regions return value
- (test (assq 'test info)) ; The test clause
- )
+ "Return non-nil iff mailcap entry INFO passes its test clause.
+Also return non-nil if no test clause is present."
+ (let ((test (assq 'test info)) ; The test clause
+ status)
(setq status (and test (split-string (cdr test) " ")))
(if (and (or (assoc "needsterm" info)
(assoc "needsterminal" info)
;;;
(defun mailcap-possible-viewers (major minor)
- ;; Return a list of possible viewers from MAJOR for minor type MINOR
+ "Return a list of possible viewers from MAJOR for minor type MINOR."
(let ((exact '())
(wildcard '()))
(while major
(cond
((equal (car (car major)) minor)
(setq exact (cons (cdr (car major)) exact)))
- ((and minor (string-match (car (car major)) minor))
+ ((and minor (string-match (concat "^" (car (car major)) "$") minor))
(setq wildcard (cons (cdr (car major)) wildcard))))
(setq major (cdr major)))
(nconc exact wildcard)))
(setq save-pos (point))
(skip-chars-forward "%")
(setq save-chr (char-after (point)))
+ ;; Escapes:
+ ;; %s: name of a file for the body data
+ ;; %t: content-type
+ ;; %{<parameter name}: value of parameter in mailcap entry
+ ;; %n: number of sub-parts for multipart content-type
+ ;; %F: a set of content-type/filename pairs for multiparts
(cond
((null save-chr) nil)
((= save-chr ?t)
(delete-region save-pos (progn (forward-char 1) (point)))
(insert (or (cdr (assq 'type type-info)) "\"\"")))
- ((= save-chr ?M)
- (delete-region save-pos (progn (forward-char 1) (point)))
- (insert "\"\""))
- ((= save-chr ?n)
- (delete-region save-pos (progn (forward-char 1) (point)))
- (insert "\"\""))
- ((= save-chr ?F)
+ ((memq save-chr '(?M ?n ?F))
(delete-region save-pos (progn (forward-char 1) (point)))
(insert "\"\""))
((= save-chr ?{)
(insert (or (cdr (assoc subst type-info)) "\"\"")))
(t nil))))
(buffer-string)))
- (t (error "Bad value to mailcap-unescape-mime-test. %s" test)))))
+ (t (error "Bad value to mailcap-unescape-mime-test: %s" test)))))
(defvar mailcap-viewer-test-cache nil)
(defun mailcap-viewer-passes-test (viewer-info type-info)
- ;; Return non-nil iff the viewer specified by VIEWER-INFO passes its
- ;; test clause (if any).
+ "Return non-nil iff viewer specified by VIEWER-INFO passes its test clause.
+Also return non-nil if it has no test clause. TYPE-INFO is an argument
+to supply to the test."
(let* ((test-info (assq 'test viewer-info))
(test (cdr test-info))
(otest test)
((not test-info) t) ; No test clause
((not test) nil) ; Already failed test
((eq test t) t) ; Already passed test
- ((and (symbolp test) ; Lisp function as test
- (fboundp test))
+ ((functionp test) ; Lisp function as test
(funcall test type-info))
((and (symbolp test) ; Lisp variable as test
(boundp test))
test (list shell-file-name nil nil nil
shell-command-switch test)
status (apply 'call-process test))
- (= 0 status))))
+ (eq 0 status))))
(push (list otest result) mailcap-viewer-test-cache)
result)))
(setq mailcap-mime-data
(cons (cons major (list (cons minor info)))
mailcap-mime-data))
- (let ((cur-minor (assoc minor old-major)))
- (cond
- ((or (null cur-minor) ; New minor area, or
- (assq 'test info)) ; Has a test, insert at beginning
- (setcdr old-major (cons (cons minor info) (cdr old-major))))
- ((and (not (assq 'test info)) ; No test info, replace completely
- (not (assq 'test cur-minor))
+ (let ((cur-minor (assoc minor old-major)))
+ (cond
+ ((or (null cur-minor) ; New minor area, or
+ (assq 'test info)) ; Has a test, insert at beginning
+ (setcdr old-major (cons (cons minor info) (cdr old-major))))
+ ((and (not (assq 'test info)) ; No test info, replace completely
+ (not (assq 'test cur-minor))
(equal (assq 'viewer info) ; Keep alternative viewer
(assq 'viewer cur-minor)))
- (setcdr cur-minor info))
- (t
- (setcdr old-major (cons (cons minor info) (cdr old-major))))))
+ (setcdr cur-minor info))
+ (t
+ (setcdr old-major (cons (cons minor info) (cdr old-major))))))
)))
(defun mailcap-add (type viewer &optional test)
;;;
(defun mailcap-viewer-lessp (x y)
- ;; Return t iff viewer X is more desirable than viewer Y
+ "Return t iff viewer X is more desirable than viewer Y."
(let ((x-wild (string-match "[*?]" (or (cdr-safe (assq 'type x)) "")))
(y-wild (string-match "[*?]" (or (cdr-safe (assq 'type y)) "")))
(x-lisp (not (stringp (or (cdr-safe (assq 'viewer x)) ""))))
((or (null request) (equal request ""))
(mailcap-unescape-mime-test (cdr (assq 'viewer viewer)) info))
((stringp request)
- (if (or (eq request 'test) (eq request 'viewer))
- (mailcap-unescape-mime-test
- (cdr-safe (assoc request viewer)) info)))
+ (mailcap-unescape-mime-test
+ (cdr-safe (assoc request viewer))&n
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