1 ;;; mailcap.el --- MIME media types configuration
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
6 ;; Author: William M. Perry <wmperry@aventail.com>
7 ;; Lars Magne Ingebrigtsen <larsi@gnus.org>
8 ;; Keywords: news, mail, multimedia
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 3, or (at your option)
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
25 ;; Boston, MA 02110-1301, USA.
29 ;; Provides configuration of MIME media types from directly from Lisp
30 ;; and via the usual mailcap mechanism (RFC 1524). Deals with
31 ;; mime.types similarly.
35 (eval-when-compile (require 'cl))
36 (autoload 'mail-header-parse-content-type "mail-parse")
38 ;; `mm-delete-duplicates' is an alias for `delete-dups' in Emacs 22.
39 (defalias 'mailcap-delete-duplicates
40 (if (fboundp 'delete-dups)
42 (autoload 'mm-delete-duplicates "mm-util")
43 'mm-delete-duplicates))
46 "Definition of viewers for MIME types."
50 (defvar mailcap-parse-args-syntax-table
51 (let ((table (copy-syntax-table emacs-lisp-mode-syntax-table)))
52 (modify-syntax-entry ?' "\"" table)
53 (modify-syntax-entry ?` "\"" table)
54 (modify-syntax-entry ?{ "(" table)
55 (modify-syntax-entry ?} ")" table)
57 "A syntax table for parsing SGML attributes.")
60 (when (featurep 'xemacs)
65 (defvar mailcap-print-command
67 (cons (if (boundp 'lpr-command)
70 (when (boundp 'lpr-switches)
71 (if (stringp lpr-switches)
75 "Shell command (including switches) used to print Postscript files.")
77 ;; Postpone using defcustom for this as it's so big and we essentially
78 ;; have to have two copies of the data around then. Perhaps just
79 ;; customize the Lisp viewers and rely on the normal configuration
80 ;; files for the rest? -- fx
81 (defvar mailcap-mime-data
84 (viewer . "gnumeric %s")
85 (test . (getenv "DISPLAY"))
86 (type . "application/vnd.ms-excel"))
88 (viewer . ssl-view-site-cert)
89 (test . (fboundp 'ssl-view-site-cert))
90 (type . "application/x-x509-ca-cert"))
92 (viewer . ssl-view-user-cert)
93 (test . (fboundp 'ssl-view-user-cert))
94 (type . "application/x-x509-user-cert"))
96 (viewer . mailcap-save-binary-file)
98 (type . "application/octet-stream"))
100 (viewer . "xdvi -safer %s")
101 (test . (eq window-system 'x))
103 (type . "application/dvi")
104 ("print" . "dvips -qRP %s"))
106 (viewer . "dvitty %s")
107 (test . (not (getenv "DISPLAY")))
108 (type . "application/dvi")
109 ("print" . "dvips -qRP %s"))
111 (viewer . mailcap-maybe-eval)
112 (type . "application/emacs-lisp"))
114 (viewer . mailcap-maybe-eval)
115 (type . "application/x-emacs-lisp"))
117 (viewer . mailcap-save-binary-file)
119 (type . "application/x-tar"))
122 (test . (fboundp 'tex-mode))
123 (type . "application/x-latex"))
126 (test . (fboundp 'tex-mode))
127 (type . "application/x-tex"))
130 (test . (fboundp 'tex-mode))
131 (type . "application/latex"))
134 (test . (fboundp 'tex-mode))
135 (type . "application/tex"))
137 (viewer . texinfo-mode)
138 (test . (fboundp 'texinfo-mode))
139 (type . "application/tex"))
141 (viewer . mailcap-save-binary-file)
143 (type . "application/zip")
146 (viewer . "gv -safer %s")
147 (type . "application/pdf")
148 (test . window-system)
149 ("print" . ,(concat "pdf2ps %s - | " mailcap-print-command)))
152 (type . "application/pdf")
153 ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
154 (test . (eq window-system 'x)))
157 (type . "application/pdf")
158 ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
159 (test . (eq window-system 'x)))
161 (viewer . ,(concat "pdftotext %s -"))
162 (type . "application/pdf")
163 ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
166 (viewer . "gv -safer %s")
167 (type . "application/postscript")
168 (test . window-system)
169 ("print" . ,(concat mailcap-print-command " %s"))
172 (viewer . "ghostview -dSAFER %s")
173 (type . "application/postscript")
174 (test . (eq window-system 'x))
175 ("print" . ,(concat mailcap-print-command " %s"))
178 (viewer . "ps2ascii %s")
179 (type . "application/postscript")
180 (test . (not (getenv "DISPLAY")))
181 ("print" . ,(concat mailcap-print-command " %s"))
184 (viewer . sieve-mode)
185 (test . (fboundp 'sieve-mode))
186 (type . "application/sieve"))
188 (viewer . "gpg --import --interactive --verbose")
189 (type . "application/pgp-keys")
193 (viewer . "maplay %s")
194 (type . "audio/x-mpeg"))
196 (viewer . "showaudio")
200 (viewer . mm-view-message)
201 (test . (and (featurep 'gnus)
203 (type . "message/rfc822"))
206 (test . (fboundp 'vm-mode))
207 (type . "message/rfc822"))
210 (test . (fboundp 'w3-mode))
211 (type . "message/rfc822"))
214 (type . "message/rfc822")))
217 (viewer . "xwud -in %s")
218 (type . "image/x-xwd")
219 ("compose" . "xwd -frame > %s")
220 (test . (eq window-system 'x))
223 (viewer . "xwud -in %s")
224 (type . "image/x-xwd")
225 ("compose" . "xwd -frame > %s")
226 (test . (eq window-system 'x))
229 (viewer . "xwud -in %s")
230 (type . "image/x-xwd")
231 ("compose" . "xwd -frame > %s")
232 (test . (eq window-system 'x))
235 (viewer . "display %s")
237 (test . (eq window-system 'x))
242 (test . (eq window-system 'x))
247 (test . (fboundp 'w3-mode))
248 (type . "text/plain"))
251 (test . (fboundp 'view-mode))
252 (type . "text/plain"))
254 (viewer . fundamental-mode)
255 (type . "text/plain"))
257 (viewer . enriched-decode)
258 (test . (fboundp 'enriched-decode))
259 (type . "text/enriched"))
261 (viewer . mm-w3-prepare-buffer)
262 (test . (fboundp 'w3-prepare-buffer))
263 (type . "text/html"))
266 (test . (fboundp 'dns-mode))
267 (type . "text/dns")))
270 (viewer . "mpeg_play %s")
271 (type . "video/mpeg")
272 (test . (eq window-system 'x))
276 (viewer . "webspace -remote %s -URL %u")
277 (type . "x-world/x-vrml")
283 (type . "archive/tar")
284 (test . (fboundp 'tar-mode)))))
285 "The mailcap structure is an assoc list of assoc lists.
286 1st assoc list is keyed on the major content-type
287 2nd assoc list is keyed on the minor content-type (which can be a regexp)
292 (\"postscript\" . <info>))
294 (\"plain\" . <info>)))
296 Where <info> is another assoc list of the various information
297 related to the mailcap RFC 1524. This is keyed on the lowercase
298 attribute name (viewer, test, etc). This looks like:
299 ((viewer . VIEWERINFO)
304 Where VIEWERINFO specifies how the content-type is viewed. Can be
305 a string, in which case it is run through a shell, with
306 appropriate parameters, or a symbol, in which case the symbol is
307 `funcall'ed, with the buffer as an argument.
309 TESTINFO is a test for the viewer's applicability, or nil. If nil, it
310 means the viewer is always valid. If it is a Lisp function, it is
311 called with a list of items from any extra fields from the
312 Content-Type header as argument to return a boolean value for the
313 validity. Otherwise, if it is a non-function Lisp symbol or list
314 whose car is a symbol, it is `eval'led to yield the validity. If it
315 is a string or list of strings, it represents a shell command to run
316 to return a true or false shell value for the validity.")
317 (put 'mailcap-mime-data 'risky-local-variable t)
319 (defcustom mailcap-download-directory nil
320 "*Directory to which `mailcap-save-binary-file' downloads files by default.
321 nil means your home directory."
322 :type '(choice (const :tag "Home directory" nil)
326 (defvar mailcap-poor-system-types
327 '(ms-dos ms-windows windows-nt win32 w32 mswindows)
328 "Systems that don't have a Unix-like directory hierarchy.")
331 ;;; Utility functions
334 (defun mailcap-save-binary-file ()
335 (goto-char (point-min))
337 (let ((file (read-file-name
338 "Filename to save as: "
339 (or mailcap-download-directory "~/")))
340 (require-final-newline nil))
341 (write-region (point-min) (point-max) file))
342 (kill-buffer (current-buffer))))
344 (defvar mailcap-maybe-eval-warning
347 This MIME part contains untrusted and possibly harmful content.
348 If you evaluate the Emacs Lisp code contained in it, a lot of nasty
349 things can happen. Please examine the code very carefully before you
350 instruct Emacs to evaluate it. You can browse the buffer containing
351 the code using \\[scroll-other-window].
353 If you are unsure what to do, please answer \"no\"."
354 "Text of warning message displayed by `mailcap-maybe-eval'.
355 Make sure that this text consists only of few text lines. Otherwise,
356 Gnus might fail to display all of it.")
358 (defun mailcap-maybe-eval ()
359 "Maybe evaluate a buffer of Emacs Lisp code."
360 (let ((lisp-buffer (current-buffer)))
361 (goto-char (point-min))
363 (save-window-excursion
364 (delete-other-windows)
365 (let ((buffer (get-buffer-create (generate-new-buffer-name
368 (with-current-buffer buffer
369 (insert (substitute-command-keys
370 mailcap-maybe-eval-warning))
371 (goto-char (point-min))
372 (display-buffer buffer)
373 (yes-or-no-p "This is potentially dangerous emacs-lisp code, evaluate it? "))
374 (kill-buffer buffer))))
375 (eval-buffer (current-buffer)))
376 (when (buffer-live-p lisp-buffer)
377 (with-current-buffer lisp-buffer
378 (emacs-lisp-mode)))))
382 ;;; The mailcap parser
385 (defun mailcap-replace-regexp (regexp to-string)
386 ;; Quiet replace-regexp.
387 (goto-char (point-min))
388 (while (re-search-forward regexp nil t)
389 (replace-match to-string t nil)))
391 (defvar mailcap-parsed-p nil)
393 (defun mailcap-parse-mailcaps (&optional path force)
394 "Parse out all the mailcaps specified in a path string PATH.
395 Components of PATH are separated by the `path-separator' character
396 appropriate for this system. If FORCE, re-parse even if already
397 parsed. If PATH is omitted, use the value of environment variable
398 MAILCAPS if set; otherwise (on Unix) use the path from RFC 1524, plus
399 /usr/local/etc/mailcap."
400 (interactive (list nil t))
401 (when (or (not mailcap-parsed-p)
405 ((getenv "MAILCAPS") (setq path (getenv "MAILCAPS")))
406 ((memq system-type mailcap-poor-system-types)
407 (setq path '("~/.mailcap" "~/mail.cap" "~/etc/mail.cap")))
409 ;; This is per RFC 1524, specifically
410 ;; with /usr before /usr/local.
411 '("~/.mailcap" "/etc/mailcap" "/usr/etc/mailcap"
412 "/usr/local/etc/mailcap"))))
413 (let ((fnames (reverse
415 (delete "" (split-string path path-separator))
419 (setq fname (car fnames))
420 (if (and (file-readable-p fname)
421 (file-regular-p fname))
422 (mailcap-parse-mailcap fname))
423 (setq fnames (cdr fnames))))
424 (setq mailcap-parsed-p t)))
426 (defun mailcap-parse-mailcap (fname)
427 "Parse out the mailcap file specified by FNAME."
428 (let (major ; The major mime type (image/audio/etc)
429 minor ; The minor mime type (gif, basic, etc)
430 save-pos ; Misc saved positions used in parsing
431 viewer ; How to view this mime type
432 info ; Misc info about this mime type
435 (insert-file-contents fname)
436 (set-syntax-table mailcap-parse-args-syntax-table)
437 (mailcap-replace-regexp "#.*" "") ; Remove all comments
438 (mailcap-replace-regexp "\\\\[ \t]*\n" " ") ; And collapse spaces
439 (mailcap-replace-regexp "\n+" "\n") ; And blank lines
440 (goto-char (point-max))
441 (skip-chars-backward " \t\n")
442 (delete-region (point) (point-max))
444 (skip-chars-backward " \t\n")
446 (setq save-pos (point)
448 (skip-chars-forward "^/; \t\n")
449 (downcase-region save-pos (point))
450 (setq major (buffer-substring save-pos (point)))
451 (skip-chars-forward " \t")
453 (when (eq (char-after) ?/)
455 (skip-chars-forward " \t")
456 (setq save-pos (point))
457 (skip-chars-forward "^; \t\n")
458 (downcase-region save-pos (point))
461 ((eq ?* (or (char-after save-pos) 0)) ".*")
462 ((= (point) save-pos) ".*")
463 (t (regexp-quote (buffer-substring save-pos (point)))))))
464 (skip-chars-forward " \t")
465 ;;; Got the major/minor chunks, now for the viewers/etc
466 ;;; The first item _must_ be a viewer, according to the
467 ;;; RFC for mailcap files (#1524)
469 (when (eq (char-after) ?\;)
471 (skip-chars-forward " \t")
472 (setq save-pos (point))
473 (skip-chars-forward "^;\n")
475 (while (eq (char-before) ?\\)
476 (backward-delete-char 1)
478 (skip-chars-forward "^;\n"))
479 (if (eq (or (char-after save-pos) 0) ?')
481 (narrow-to-region (1+ save-pos) (point))
482 (goto-char (point-min))
484 (read (current-buffer))
485 (goto-char (point-max))
487 (setq viewer (buffer-substring save-pos (point)))))
488 (setq save-pos (point))
490 (unless (equal viewer "")
491 (setq info (nconc (list (cons 'viewer viewer)
492 (cons 'type (concat major "/"
493 (if (string= minor ".*")
495 (mailcap-parse-mailcap-extras save-pos (point))))
496 (mailcap-mailcap-entry-passes-test info)
497 (mailcap-add-mailcap-entry major minor info))
498 (beginning-of-line)))))
500 (defun mailcap-parse-mailcap-extras (st nd)
501 "Grab all the extra stuff from a mailcap entry."
505 results ; Assoc list of results
506 name-pos ; Start of XXXX= position
507 val-pos ; Start of value position
508 done ; Found end of \'d ;s?
511 (narrow-to-region st nd)
512 (goto-char (point-min))
513 (skip-chars-forward " \n\t;")
516 (setq name-pos (point))
517 (skip-chars-forward "^ \n\t=;")
518 (downcase-region name-pos (point))
519 (setq name (buffer-substring name-pos (point)))
520 (skip-chars-forward " \t\n")
521 (if (not (eq (char-after (point)) ?=)) ; There is no value
523 (skip-chars-forward " \t\n=")
524 (setq val-pos (point))
525 (if (memq (char-after val-pos) '(?\" ?'))
527 (setq val-pos (1+ val-pos))
532 (error (goto-char (point-max)))))
534 (skip-chars-forward "^;")
535 (if (eq (char-after (1- (point))) ?\\ )
537 (subst-char-in-region (1- (point)) (point) ?\\ ? )
538 (skip-chars-forward ";"))
540 (setq value (buffer-substring val-pos (point))))
541 ;; `test' as symbol, others like "copiousoutput" and "needsx11" as
543 (setq results (cons (cons (if (string-equal name "test")
547 (skip-chars-forward " \";\n\t"))
550 (defun mailcap-mailcap-entry-passes-test (info)
551 "Return non-nil if mailcap entry INFO passes its test clause.
552 Also return non-nil if no test clause is present."
553 (let ((test (assq 'test info)) ; The test clause
555 (setq status (and test (split-string (cdr test) " ")))
556 (if (and (or (assoc "needsterm" info)
557 (assoc "needsterminal" info)
558 (assoc "needsx11" info))
559 (not (getenv "DISPLAY")))
562 ((and (equal (nth 0 status) "test")
563 (equal (nth 1 status) "-n")
564 (or (equal (nth 2 status) "$DISPLAY")
565 (equal (nth 2 status) "\"$DISPLAY\"")))
566 (setq status (if (getenv "DISPLAY") t nil)))
567 ((and (equal (nth 0 status) "test")
568 (equal (nth 1 status) "-z")
569 (or (equal (nth 2 status) "$DISPLAY")
570 (equal (nth 2 status) "\"$DISPLAY\"")))
571 (setq status (if (getenv "DISPLAY") nil t)))
574 (and test (listp test) (setcdr test status))))
577 ;;; The action routines.
580 (defun mailcap-possible-viewers (major minor)
581 "Return a list of possible viewers from MAJOR for minor type MINOR."
586 ((equal (car (car major)) minor)
587 (setq exact (cons (cdr (car major)) exact)))
588 ((and minor (string-match (concat "^" (car (car major)) "$") minor))
589 (setq wildcard (cons (cdr (car major)) wildcard))))
590 (setq major (cdr major)))
591 (nconc exact wildcard)))
593 (defun mailcap-unescape-mime-test (test type-info)
594 (let (save-pos save-chr subst)
596 ((symbolp test) test)
597 ((and (listp test) (symbolp (car test))) test)
599 (and (listp test) (stringp (car test))
600 (setq test (mapconcat 'identity test " "))))
603 (goto-char (point-min))
605 (skip-chars-forward "^%")
607 (progn (skip-chars-backward "\\\\")
609 0) ; It is an escaped %
612 (skip-chars-forward "%."))
613 (setq save-pos (point))
614 (skip-chars-forward "%")
615 (setq save-chr (char-after (point)))
617 ;; %s: name of a file for the body data
619 ;; %{<parameter name}: value of parameter in mailcap entry
620 ;; %n: number of sub-parts for multipart content-type
621 ;; %F: a set of content-type/filename pairs for multiparts
623 ((null save-chr) nil)
625 (delete-region save-pos (progn (forward-char 1) (point)))
626 (insert (or (cdr (assq 'type type-info)) "\"\"")))
627 ((memq save-chr '(?M ?n ?F))
628 (delete-region save-pos (progn (forward-char 1) (point)))
632 (skip-chars-forward "^}")
633 (downcase-region (+ 2 save-pos) (point))
634 (setq subst (buffer-substring (+ 2 save-pos) (point)))
635 (delete-region save-pos (1+ (point)))
636 (insert (or (cdr (assoc subst type-info)) "\"\"")))
639 (t (error "Bad value to mailcap-unescape-mime-test: %s" test)))))
641 (defvar mailcap-viewer-test-cache nil)
643 (defun mailcap-viewer-passes-test (viewer-info type-info)
644 "Return non-nil if viewer specified by VIEWER-INFO passes its test clause.
645 Also return non-nil if it has no test clause. TYPE-INFO is an argument
646 to supply to the test."
647 (let* ((test-info (assq 'test viewer-info))
648 (test (cdr test-info))
650 (viewer (cdr (assoc 'viewer viewer-info)))
651 (default-directory (expand-file-name "~/"))
652 status parsed-test cache result)
653 (cond ((setq cache (assoc test mailcap-viewer-test-cache))
655 ((not test-info) t) ; No test clause
660 ((not test) nil) ; Already failed test
661 ((eq test t) t) ; Already passed test
662 ((functionp test) ; Lisp function as test
663 (funcall test type-info))
664 ((and (symbolp test) ; Lisp variable as test
667 ((and (listp test) ; List to be eval'd
668 (symbolp (car test)))
671 (setq test (mailcap-unescape-mime-test test type-info)
672 test (list shell-file-name nil nil nil
673 shell-command-switch test)
674 status (apply 'call-process test))
676 (push (list otest result) mailcap-viewer-test-cache)
679 (defun mailcap-add-mailcap-entry (major minor info)
680 (let ((old-major (assoc major mailcap-mime-data)))
681 (if (null old-major) ; New major area
682 (setq mailcap-mime-data
683 (cons (cons major (list (cons minor info)))
685 (let ((cur-minor (assoc minor old-major)))
687 ((or (null cur-minor) ; New minor area, or
688 (assq 'test info)) ; Has a test, insert at beginning
689 (setcdr old-major (cons (cons minor info) (cdr old-major))))
690 ((and (not (assq 'test info)) ; No test info, replace completely
691 (not (assq 'test cur-minor))
692 (equal (assq 'viewer info) ; Keep alternative viewer
693 (assq 'viewer cur-minor)))
694 (setcdr cur-minor info))
696 (setcdr old-major (cons (cons minor info) (cdr old-major))))))
699 (defun mailcap-add (type viewer &optional test)
700 "Add VIEWER as a handler for TYPE.
701 If TEST is not given, it defaults to t."
702 (let ((tl (split-string type "/")))
703 (when (or (not (car tl))
705 (error "%s is not a valid MIME type" type))
706 (mailcap-add-mailcap-entry
709 (test . ,(if test test t))
716 (defun mailcap-viewer-lessp (x y)
717 "Return t if viewer X is more desirable than viewer Y."
718 (let ((x-wild (string-match "[*?]" (or (cdr-safe (assq 'type x)) "")))
719 (y-wild (string-match "[*?]" (or (cdr-safe (assq 'type y)) "")))
720 (x-lisp (not (stringp (or (cdr-safe (assq 'viewer x)) ""))))
721 (y-lisp (not (stringp (or (cdr-safe (assq 'viewer y)) "")))))
723 ((and x-wild (not y-wild))
725 ((and (not x-wild) y-wild)
727 ((and (not y-lisp) x-lisp)
731 (defun mailcap-mime-info (string &optional request no-decode)
732 "Get the MIME viewer command for STRING, return nil if none found.
733 Expects a complete content-type header line as its argument.
735 Second argument REQUEST specifies what information to return. If it is
736 nil or the empty string, the viewer (second field of the mailcap
737 entry) will be returned. If it is a string, then the mailcap field
738 corresponding to that string will be returned (print, description,
739 whatever). If a number, then all the information for this specific
740 viewer is returned. If `all', then all possible viewers for
741 this type is returned.
743 If NO-DECODE is non-nil, don't decode STRING."
744 ;; NO-DECODE avoids calling `mail-header-parse-content-type' from
747 major ; Major encoding (text, etc)
748 minor ; Minor encoding (html, etc)
750 save-pos ; Misc. position during parse
751 major-info ; (assoc major mailcap-mime-data)
752 minor-info ; (assoc minor major-info)
753 test ; current test proc.
754 viewers ; Possible viewers
755 passed ; Viewers that passed the test
756 viewer ; The one and only viewer
761 (list (or string "text/plain"))
762 (mail-header-parse-content-type (or string "text/plain"))))
763 (setq major (split-string (car ctl) "/"))
764 (setq minor (cadr major)
766 (when (setq major-info (cdr (assoc major mailcap-mime-data)))
767 (when (setq viewers (mailcap-possible-viewers major-info minor))
768 (setq info (mapcar (lambda (a) (cons (symbol-name (car a))
772 (if (mailcap-viewer-passes-test (car viewers) info)
773 (setq passed (cons (car viewers) passed)))
774 (setq viewers (cdr viewers)))
775 (setq passed (sort passed 'mailcap-viewer-lessp))
776 (setq viewer (car passed))))
777 (when (and (stringp (cdr (assq 'viewer viewer)))
779 (setq viewer (car passed)))
781 ((and (null viewer) (not (equal major "default")) request)
782 (mailcap-mime-info "default" request no-decode))
783 ((or (null request) (equal request ""))
784 (mailcap-unescape-mime-test (cdr (assq 'viewer viewer)) info))
786 (mailcap-unescape-mime-test
787 (cdr-safe (assoc request viewer)) info))
791 ;; MUST make a copy *sigh*, else we modify mailcap-mime-data
792 (setq viewer (copy-sequence viewer))
793 (let ((view (assq 'viewer viewer))
794 (test (assq 'test viewer)))
795 (if view (setcdr view (mailcap-unescape-mime-test (cdr view) info)))
796 (if test (setcdr test (mailcap-unescape-mime-test (cdr test) info))))
800 ;;; Experimental MIME-types parsing
803 (defvar mailcap-mime-extensions
804 '(("" . "text/plain")
805 (".abs" . "audio/x-mpeg")
806 (".aif" . "audio/aiff")
807 (".aifc" . "audio/aiff")
808 (".aiff" . "audio/aiff")
809 (".ano" . "application/x-annotator")
810 (".au" . "audio/ulaw")
811 (".avi" . "video/x-msvideo")
812 (".bcpio" . "application/x-bcpio")
813 (".bin" . "application/octet-stream")
814 (".cdf" . "application/x-netcdr")
815 (".cpio" . "application/x-cpio")
816 (".csh" . "application/x-csh")
817 (".css" . "text/css")
818 (".dvi" . "application/x-dvi")
819 (".diff" . "text/x-patch")
820 (".el" . "application/emacs-lisp")
821 (".eps" . "application/postscript")
822 (".etx" . "text/x-setext")
823 (".exe" . "application/octet-stream")
824 (".fax" . "image/x-fax")
825 (".gif" . "image/gif")
826 (".hdf" . "application/x-hdf")
827 (".hqx" . "application/mac-binhex40")
828 (".htm" . "text/html")
829 (".html" . "text/html")
830 (".icon" . "image/x-icon")
831 (".ief" . "image/ief")
832 (".jpg" . "image/jpeg")
833 (".macp" . "image/x-macpaint")
834 (".man" . "application/x-troff-man")
835 (".me" . "application/x-troff-me")
836 (".mif" . "application/mif")
837 (".mov" . "video/quicktime")
838 (".movie" . "video/x-sgi-movie")
839 (".mp2" . "audio/x-mpeg")
840 (".mp3" . "audio/x-mpeg")
841 (".mp2a" . "audio/x-mpeg2")
842 (".mpa" . "audio/x-mpeg")
843 (".mpa2" . "audio/x-mpeg2")
844 (".mpe" . "video/mpeg")
845 (".mpeg" . "video/mpeg")
846 (".mpega" . "audio/x-mpeg")
847 (".mpegv" . "video/mpeg")
848 (".mpg" . "video/mpeg")
849 (".mpv" . "video/mpeg")
850 (".ms" . "application/x-troff-ms")
851 (".nc" . "application/x-netcdf")
852 (".nc" . "application/x-netcdf")
853 (".oda" . "application/oda")
854 (".patch" . "text/x-patch")
855 (".pbm" . "image/x-portable-bitmap")
856 (".pdf" . "application/pdf")
857 (".pgm" . "image/portable-graymap")
858 (".pict" . "image/pict")
859 (".png" . "image/png")
860 (".pnm" . "image/x-portable-anymap")
861 (".ppm" . "image/portable-pixmap")
862 (".ps" . "application/postscript")
863 (".qt" . "video/quicktime")
864 (".ras" . "image/x-raster")
865 (".rgb" . "image/x-rgb")
866 (".rtf" . "application/rtf")
867 (".rtx" . "text/richtext")
868 (".sh" . "application/x-sh")
869 (".sit" . "application/x-stuffit")
870 (".siv" . "application/sieve")
871 (".snd" . "audio/basic")
872 (".soa" . "text/dns")
873 (".src" . "application/x-wais-source")
874 (".tar" . "archive/tar")
875 (".tcl" . "application/x-tcl")
876 (".tex" . "application/x-tex")
877 (".texi" . "application/texinfo")
878 (".tga" . "image/x-targa")
879 (".tif" . "image/tiff")
880 (".tiff" . "image/tiff")
881 (".tr" . "application/x-troff")
882 (".troff" . "application/x-troff")
883 (".tsv" . "text/tab-separated-values")
884 (".txt" . "text/plain")
885 (".vbs" . "video/mpeg")
886 (".vox" . "audio/basic")
887 (".vrml" . "x-world/x-vrml")
888 (".wav" . "audio/x-wav")
889 (".xls" . "application/vnd.ms-excel")
890 (".wrl" . "x-world/x-vrml")
891 (".xbm" . "image/xbm")
892 (".xpm" . "image/xpm")
893 (".xwd" . "image/windowdump")
894 (".zip" . "application/zip")
895 (".ai" . "application/postscript")
896 (".jpe" . "image/jpeg")
897 (".jpeg" . "image/jpeg"))
898 "An alist of file extensions and corresponding MIME content-types.
899 This exists for you to customize the information in Lisp. It is
900 merged with values from mailcap files by `mailcap-parse-mimetypes'.")
902 (defvar mailcap-mimetypes-parsed-p nil)
904 (defun mailcap-parse-mimetypes (&optional path force)
905 "Parse out all the mimetypes specified in a Unix-style path string PATH.
906 Components of PATH are separated by the `path-separator' character
907 appropriate for this system. If PATH is omitted, use the value of
908 environment variable MIMETYPES if set; otherwise use a default path.
909 If FORCE, re-parse even if already parsed."
910 (interactive (list nil t))
911 (when (or (not mailcap-mimetypes-parsed-p)
915 ((getenv "MIMETYPES") (setq path (getenv "MIMETYPES")))
916 ((memq system-type mailcap-poor-system-types)
917 (setq path '("~/mime.typ" "~/etc/mime.typ")))
919 ;; mime.types seems to be the normal name, definitely so
920 ;; on current GNUish systems. The search order follows
924 "/usr/etc/mime.types"
925 "/usr/local/etc/mime.types"
926 "/usr/local/www/conf/mime.types"
929 "/usr/etc/mime-types"
930 "/usr/local/etc/mime-types"
931 "/usr/local/www/conf/mime-types"))))
932 (let ((fnames (reverse (if (stringp path)
933 (delete "" (split-string path path-separator))
937 (setq fname (car fnames))
938 (if (and (file-readable-p fname))
939 (mailcap-parse-mimetype-file fname))
940 (setq fnames (cdr fnames))))
941 (setq mailcap-mimetypes-parsed-p t)))
943 (defun mailcap-parse-mimetype-file (fname)
944 "Parse out a mime-types file FNAME."
945 (let (type ; The MIME type for this line
946 extns ; The extensions for this line
947 save-pos ; Misc. saved buffer positions
950 (insert-file-contents fname)
951 (mailcap-replace-regexp "#.*" "")
952 (mailcap-replace-regexp "\n+" "\n")
953 (mailcap-replace-regexp "[ \t]+$" "")
954 (goto-char (point-max))
955 (skip-chars-backward " \t\n")
956 (delete-region (point) (point-max))
957 (goto-char (point-min))
959 (skip-chars-forward " \t\n")
960 (setq save-pos (point))
961 (skip-chars-forward "^ \t\n")
962 (downcase-region save-pos (point))
963 (setq type (buffer-substring save-pos (point)))
965 (skip-chars-forward " \t")
966 (setq save-pos (point))
967 (skip-chars-forward "^ \t\n")
968 (setq extns (cons (buffer-substring save-pos (point)) extns)))
970 (setq mailcap-mime-extensions
972 (cons (if (= (string-to-char (car extns)) ?.)
974 (concat "." (car extns))) type)
975 mailcap-mime-extensions)
976 extns (cdr extns)))))))
978 (defun mailcap-extension-to-mime (extn)
979 "Return the MIME content type of the file extensions EXTN."
980 (mailcap-parse-mimetypes)
981 (if (and (stringp extn)
982 (not (eq (string-to-char extn) ?.)))
983 (setq extn (concat "." extn)))
984 (cdr (assoc (downcase extn) mailcap-mime-extensions)))
987 (defalias 'mailcap-command-p 'executable-find)
989 (defun mailcap-mime-types ()
990 "Return a list of MIME media types."
991 (mailcap-parse-mimetypes)
992 (mailcap-delete-duplicates
994 (mapcar 'cdr mailcap-mime-extensions)
1002 (let ((type (cdr (assq 'type (cdr m)))))
1003 (if (equal (cadr (split-string type "/"))
1008 mailcap-mime-data)))))
1012 ;;; arch-tag: 1fd4f9c9-c305-4d2e-9747-3a4d45baa0bd
1013 ;;; mailcap.el ends here