mailcap.el (mailcap-mailcap-entry-passes-test): Doc fix

[gnus] / lisp / mailcap.el

diff --git a/lisp/mailcap.el b/lisp/mailcap.el
index ba2bfb7..d888110 100644 (file)
--- a/lisp/mailcap.el
+++ b/lisp/mailcap.el
@@ -1,34 +1,61 @@
-;;; mailcap.el --- Functions for displaying MIME parts
-;; Copyright (C) 1998,99 Free Software Foundation, Inc.
+;;; mailcap.el --- MIME media types configuration
+
+;; Copyright (C) 1998-2015 Free Software Foundation, Inc.

 
 ;; Author: William M. Perry <wmperry@aventail.com>
 ;;     Lars Magne Ingebrigtsen <larsi@gnus.org>
 
 ;; 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.
 
 
 ;; This file is part of GNU Emacs.
 

-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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
 ;; it under the terms of the GNU General Public License as published by

-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.

 
 ;; GNU Emacs is distributed in the hope that it will be useful,
 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
 
 ;; GNU Emacs is distributed in the hope that it will be useful,
 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of

-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.         See the
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 ;; GNU General Public License for more details.
 
 ;; You should have received a copy of the GNU General Public License
 ;; GNU General Public License for more details.
 
 ;; You should have received a copy of the GNU General Public License

-;; along with GNU Emacs; see the file COPYING.  If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

 
 ;;; Commentary:
 
 
 ;;; 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))
 ;;; Code:
 
 (eval-when-compile (require 'cl))

-(require 'mail-parse)
-(require 'mm-util)
+(autoload 'mail-header-parse-content-type "mail-parse")
+
+;; `mm-delete-duplicates' is an alias for `delete-dups' in Emacs 22.
+(defalias 'mailcap-delete-duplicates
+  (if (fboundp 'delete-dups)
+      'delete-dups
+    (autoload 'mm-delete-duplicates "mm-util")
+    'mm-delete-duplicates))
+
+;; `mailcap-replace-in-string' is an alias like `gnus-replace-in-string'.
+(eval-and-compile
+  (cond
+   ((fboundp 'replace-regexp-in-string)
+    (defun mailcap-replace-in-string  (string regexp newtext &optional literal)
+      "Replace all matches for REGEXP with NEWTEXT in STRING.
+If LITERAL is non-nil, insert NEWTEXT literally.  Return a new
+string containing the replacements.
+This is a compatibility function for different Emacsen."
+      (replace-regexp-in-string regexp newtext string nil literal)))
+   ((fboundp 'replace-in-string)
+    (defalias 'mailcap-replace-in-string 'replace-in-string))))
+
+(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)))
 
 (defvar mailcap-parse-args-syntax-table
   (let ((table (copy-syntax-table emacs-lisp-mode-syntax-table)))


@@ -37,10 +64,36 @@
     (modify-syntax-entry ?{ "(" table)
     (modify-syntax-entry ?} ")" table)
     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
 (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))
      ("x-x509-ca-cert"
       (viewer . ssl-view-site-cert)
       (test . (fboundp 'ssl-view-site-cert))


@@ -52,23 +105,24 @@
      ("octet-stream"
       (viewer . mailcap-save-binary-file)
       (non-viewer . t)
      ("octet-stream"
       (viewer . mailcap-save-binary-file)
       (non-viewer . t)

-      (type ."application/octet-stream"))
+      (type . "application/octet-stream"))

      ("dvi"
      ("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")
       ("needsx11")

-      (type   . "application/dvi"))
+      (type   . "application/dvi")
+      ("print" . "dvips -qRP %s"))

      ("dvi"
       (viewer . "dvitty %s")
       (test   . (not (getenv "DISPLAY")))
      ("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"))
      ("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)
      ("x-tar"
       (viewer . mailcap-save-binary-file)
       (non-viewer . t)


@@ -99,22 +153,61 @@
       (type   . "application/zip")
       ("copiousoutput"))
      ("pdf"
       (type   . "application/zip")
       ("copiousoutput"))
      ("pdf"

-      (viewer . "acroread %s")
-      (type   . "application/pdf"))
+      (viewer . pdf-view-mode)
+      (type . "application/pdf")
+      (test . (and (fboundp 'pdf-view-mode)
+                  (eq window-system 'x))))
+     ("pdf"
+      (viewer . doc-view-mode)
+      (type . "application/pdf")
+      (test . (and (fboundp 'doc-view-mode)
+                  (eq window-system 'x))))
+     ("pdf"
+      (viewer . "gv -safer %s")
+      (type . "application/pdf")
+      (test . window-system)
+      ("print" . ,(concat "pdf2ps %s - | " mailcap-print-command)))
+     ("pdf"
+      (viewer . "gpdf %s")
+      (type . "application/pdf")
+      ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
+      (test . (eq window-system 'x)))
+     ("pdf"
+      (viewer . "xpdf %s")
+      (type . "application/pdf")
+      ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
+      (test . (eq window-system 'x)))
+     ("pdf"
+      (viewer . ,(concat "pdftotext %s -"))
+      (type   . "application/pdf")
+      ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
+      ("copiousoutput"))

      ("postscript"
      ("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")
      ("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")))
       ("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")
     ("audio"
      ("x-mpeg"
       (viewer . "maplay %s")


@@ -132,55 +225,39 @@
       (viewer . vm-mode)
       (test   . (fboundp 'vm-mode))
       (type   . "message/rfc822"))
       (viewer . vm-mode)
       (test   . (fboundp 'vm-mode))
       (type   . "message/rfc822"))

-     ("rfc-*822"
-      (viewer . w3-mode)
-      (test   . (fboundp 'w3-mode))
-      (type   . "message/rfc822"))

      ("rfc-*822"
       (viewer . view-mode)
      ("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")
       (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")
       ("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")
       ("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"))
       ("needsx11"))

-     (".*"
-      (viewer . "aopen %s")
-      (type   . "image/*")
-      (test   . (eq (mm-device-type) 'ns)))

      (".*"
       (viewer . "display %s")
       (type . "image/*")
      (".*"
       (viewer . "display %s")
       (type . "image/*")

-      (test   . (eq (mm-device-type) 'x))
+      (test   . (eq window-system 'x))

       ("needsx11"))
      (".*"
       (viewer . "ee %s")
       (type . "image/*")
       ("needsx11"))
      (".*"
       (viewer . "ee %s")
       (type . "image/*")

-      (test   . (eq (mm-device-type) 'x))
+      (test   . (eq window-system 'x))

       ("needsx11")))
     ("text"
       ("needsx11")))
     ("text"

-     ("plain"
-      (viewer  . w3-mode)
-      (test    . (fboundp 'w3-mode))
-      (type    . "text/plain"))

      ("plain"
       (viewer  . view-mode)
       (test    . (fboundp 'view-mode))
      ("plain"
       (viewer  . view-mode)
       (test    . (fboundp 'view-mode))


@@ -189,18 +266,18 @@
       (viewer  . fundamental-mode)
       (type    . "text/plain"))
      ("enriched"
       (viewer  . fundamental-mode)
       (type    . "text/plain"))
      ("enriched"

-      (viewer . enriched-decode-region)
+      (viewer . enriched-decode)

       (test   . (fboundp 'enriched-decode))
       (type   . "text/enriched"))
       (test   . (fboundp 'enriched-decode))
       (type   . "text/enriched"))

-     ("html"
-      (viewer . mm-w3-prepare-buffer)
-      (test   . (fboundp 'w3-prepare-buffer))
-      (type   . "text/html")))
+     ("dns"
+      (viewer . dns-mode)
+      (test   . (fboundp 'dns-mode))
+      (type   . "text/dns")))

     ("video"
      ("mpeg"
       (viewer . "mpeg_play %s")
       (type   . "video/mpeg")
     ("video"
      ("mpeg"
       (viewer . "mpeg_play %s")
       (type   . "video/mpeg")

-      (test   . (eq (mm-device-type) 'x))
+      (test   . (eq window-system 'x))

       ("needsx11")))
     ("x-world"
      ("x-vrml"
       ("needsx11")))
     ("x-world"
      ("x-vrml"


@@ -225,57 +302,43 @@ Which looks like:
    (\"plain\" . <info>)))
 
 Where <info> is another assoc list of the various information
    (\"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:
 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
 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.
+`funcall'ed, 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.")
+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.")
+(put 'mailcap-mime-data 'risky-local-variable t)

 
 

-(defvar mailcap-download-directory nil
-  "*Where downloaded files should go by default.")
+(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-temporary-directory
-  (cond ((fboundp 'temp-directory) (temp-directory))
-       ((boundp 'temporary-file-directory) temporary-file-directory)
-       ("/tmp/"))
-  "*Where temporary files go.")
+(defvar mailcap-poor-system-types
+  '(ms-dos windows-nt)
+  "Systems that don't have a Unix-like directory hierarchy.")

 
 ;;;
 ;;; Utility functions
 ;;;
 
 
 ;;;
 ;;; 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
 (defun mailcap-save-binary-file ()
   (goto-char (point-min))
   (unwind-protect


@@ -286,11 +349,42 @@ not.")
        (write-region (point-min) (point-max) file))
     (kill-buffer (current-buffer))))
 
        (write-region (point-min) (point-max) file))
     (kill-buffer (current-buffer))))
 

+(defvar mailcap-maybe-eval-warning
+  "*** WARNING ***
+
+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
+the code using \\[scroll-other-window].
+
+If you are unsure what to do, please answer \"no\"."
+  "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 ()
 (defun mailcap-maybe-eval ()

-  "Maybe evaluate a buffer of emacs lisp code."
-  (if (yes-or-no-p "This is emacs-lisp code, evaluate it? ")
-      (eval-buffer (current-buffer))
-    (emacs-lisp-mode)))
+  "Maybe evaluate a buffer of Emacs Lisp code."
+  (let ((lisp-buffer (current-buffer)))
+    (goto-char (point-min))
+    (when
+       (save-window-excursion
+         (delete-other-windows)
+         (let ((buffer (get-buffer-create (generate-new-buffer-name
+                                           "*Warning*"))))
+           (unwind-protect
+               (with-current-buffer buffer
+                 (insert (substitute-command-keys
+                          mailcap-maybe-eval-warning))
+                 (goto-char (point-min))
+                 (display-buffer buffer)
+                 (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)
+      (with-current-buffer lisp-buffer
+       (emacs-lisp-mode)))))
+

 
 ;;;
 ;;; The mailcap parser
 
 ;;;
 ;;; The mailcap parser


@@ -305,39 +399,40 @@ not.")
 (defvar mailcap-parsed-p nil)
 
 (defun mailcap-parse-mailcaps (&optional path force)
 (defvar mailcap-parsed-p nil)
 
 (defun mailcap-parse-mailcaps (&optional path force)

-  "Parse out all the mailcaps specified in a unix-style path string PATH.
-If FORCE, re-parse even if already parsed."
+  "Parse out all the mailcaps specified in a path string PATH.
+Components of PATH are separated by the `path-separator' character
+appropriate for this system.  If FORCE, re-parse even if already
+parsed.  If PATH is omitted, use the value of environment variable
+MAILCAPS if set; otherwise (on Unix) use the path from RFC 1524, plus
+/usr/local/etc/mailcap."

   (interactive (list nil t))
   (when (or (not mailcap-parsed-p)
            force)
     (cond
      (path nil)
      ((getenv "MAILCAPS") (setq path (getenv "MAILCAPS")))
   (interactive (list nil t))
   (when (or (not mailcap-parsed-p)
            force)
     (cond
      (path nil)
      ((getenv "MAILCAPS") (setq path (getenv "MAILCAPS")))

-     ((memq system-type '(ms-dos ms-windows windows-nt))
-      (setq path (mapconcat 'expand-file-name
-                           '("~/mail.cap" "~/etc/mail.cap" "~/.mailcap")
-                           ";")))
-     (t (setq path (mapconcat 'expand-file-name
-                             '("~/.mailcap"
-                               "/etc/mailcap:/usr/etc/mailcap"
-                               "/usr/local/etc/mailcap") ":"))))
+     ((memq system-type mailcap-poor-system-types)
+      (setq path '("~/.mailcap" "~/mail.cap" "~/etc/mail.cap")))
+     (t (setq path
+             ;; This is per RFC 1524, specifically
+             ;; with /usr before /usr/local.
+             '("~/.mailcap" "/etc/mailcap" "/usr/etc/mailcap"
+               "/usr/local/etc/mailcap"))))

     (let ((fnames (reverse
     (let ((fnames (reverse

-                  (split-string
-                   path (if (memq system-type
-                                  '(ms-dos ms-windows windows-nt))
-                            ";"
-                          ":"))))
+                  (if (stringp path)
+                      (split-string path path-separator t)
+                    path)))

          fname)
       (while fnames
        (setq fname (car fnames))
          fname)
       (while fnames
        (setq fname (car fnames))

-       (if (and (file-exists-p fname) (file-readable-p fname)
+       (if (and (file-readable-p fname)

                 (file-regular-p fname))
                 (file-regular-p fname))

-           (mailcap-parse-mailcap (car fnames)))
+           (mailcap-parse-mailcap fname))

        (setq fnames (cdr fnames))))
        (setq fnames (cdr fnames))))

-    (setq mailcap-parsed-p t)))
+      (setq mailcap-parsed-p t)))

 
 (defun mailcap-parse-mailcap (fname)
 
 (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
   (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


@@ -348,25 +443,24 @@ If FORCE, re-parse even if already parsed."
       (insert-file-contents fname)
       (set-syntax-table mailcap-parse-args-syntax-table)
       (mailcap-replace-regexp "#.*" "")        ; Remove all comments
       (insert-file-contents fname)
       (set-syntax-table mailcap-parse-args-syntax-table)
       (mailcap-replace-regexp "#.*" "")        ; Remove all comments

+      (mailcap-replace-regexp "\\\\[ \t]*\n" " ") ; And collapse spaces

       (mailcap-replace-regexp "\n+" "\n") ; And blank lines
       (mailcap-replace-regexp "\n+" "\n") ; And blank lines

-      (mailcap-replace-regexp "\\\\[ \t\n]+" " ") ; And collapse spaces
-      (mailcap-replace-regexp (concat (regexp-quote "\\") "[ \t]*\n") "")

       (goto-char (point-max))
       (skip-chars-backward " \t\n")
       (delete-region (point) (point-max))
       (goto-char (point-max))
       (skip-chars-backward " \t\n")
       (delete-region (point) (point-max))

-      (goto-char (point-min))
-      (while (not (eobp))
-       (skip-chars-forward " \t\n")
+      (while (not (bobp))
+       (skip-chars-backward " \t\n")
+       (beginning-of-line)

        (setq save-pos (point)
              info nil)
        (skip-chars-forward "^/; \t\n")
        (downcase-region save-pos (point))
        (setq major (buffer-substring save-pos (point)))
        (setq save-pos (point)
              info nil)
        (skip-chars-forward "^/; \t\n")
        (downcase-region save-pos (point))
        (setq major (buffer-substring save-pos (point)))

-       (skip-chars-forward " \t\n")
+       (skip-chars-forward " \t")

        (setq minor "")
        (when (eq (char-after) ?/)
          (forward-char)
        (setq minor "")
        (when (eq (char-after) ?/)
          (forward-char)

-         (skip-chars-forward " \t\n")
+         (skip-chars-forward " \t")

          (setq save-pos (point))
          (skip-chars-forward "^; \t\n")
          (downcase-region save-pos (point))
          (setq save-pos (point))
          (skip-chars-forward "^; \t\n")
          (downcase-region save-pos (point))


@@ -375,14 +469,14 @@ If FORCE, re-parse even if already parsed."
                 ((eq ?* (or (char-after save-pos) 0)) ".*")
                 ((= (point) save-pos) ".*")
                 (t (regexp-quote (buffer-substring save-pos (point)))))))
                 ((eq ?* (or (char-after save-pos) 0)) ".*")
                 ((= (point) save-pos) ".*")
                 (t (regexp-quote (buffer-substring save-pos (point)))))))

-       (skip-chars-forward " \t\n")
+       (skip-chars-forward " \t")

        ;;; Got the major/minor chunks, now for the viewers/etc
        ;;; The first item _must_ be a viewer, according to the
        ;;; 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 "")
        (setq viewer "")

-       (when (eq (char-after) ?\;) 
+       (when (eq (char-after) ?\;)

          (forward-char)
          (forward-char)

-         (skip-chars-forward " \t\n")
+         (skip-chars-forward " \t")

          (setq save-pos (point))
          (skip-chars-forward "^;\n")
          ;; skip \;
          (setq save-pos (point))
          (skip-chars-forward "^;\n")
          ;; skip \;


@@ -401,17 +495,18 @@ If FORCE, re-parse even if already parsed."
            (setq viewer (buffer-substring save-pos (point)))))
        (setq save-pos (point))
        (end-of-line)
            (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 ".*")
                                                          "*" minor))))
                            (mailcap-parse-mailcap-extras save-pos (point))))
          (mailcap-mailcap-entry-passes-test info)
          (setq info (nconc (list (cons 'viewer viewer)
                                  (cons 'type (concat major "/"
                                                      (if (string= minor ".*")
                                                          "*" minor))))
                            (mailcap-parse-mailcap-extras save-pos (point))))
          (mailcap-mailcap-entry-passes-test info)

-         (mailcap-add-mailcap-entry major minor info))))))
+         (mailcap-add-mailcap-entry major minor info))
+       (beginning-of-line)))))

 
 (defun mailcap-parse-mailcap-extras (st nd)
 
 (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
   (let (
        name                            ; From name=
        value                           ; its value


@@ -451,16 +546,23 @@ If FORCE, re-parse even if already parsed."
                    (skip-chars-forward ";"))
                (setq done t))))
          (setq value (buffer-substring val-pos (point))))
                    (skip-chars-forward ";"))
                (setq done t))))
          (setq value (buffer-substring val-pos (point))))

-       (setq results (cons (cons name value) results))
+       ;; `test' as symbol, others like "copiousoutput" and "needsx11" as
+       ;; strings
+       (setq results (cons (cons (if (string-equal name "test")
+                                      'test
+                                    name)
+                                  value) results))

        (skip-chars-forward " \";\n\t"))
       results)))
 
 (defun mailcap-mailcap-entry-passes-test (info)
        (skip-chars-forward " \";\n\t"))
       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
-       )
+  "Replace the test clause of INFO itself with a boolean for some cases.
+This function supports only `test -n $DISPLAY' and `test -z $DISPLAY',
+replaces them with t or nil.  As for others or if INFO has a interactive
+spec (needsterm, needsterminal, or needsx11) but DISPLAY is not set,
+the test clause will be unchanged."
+  (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)
     (setq status (and test (split-string (cdr test) " ")))
     (if (and (or (assoc "needsterm" info)
                 (assoc "needsterminal" info)


@@ -487,17 +589,17 @@ If FORCE, re-parse even if already parsed."
 ;;;
 
 (defun mailcap-possible-viewers (major minor)
 ;;;
 
 (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)))
   (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)))
        (setq wildcard (cons (cdr (car major)) wildcard))))
       (setq major (cdr major)))

-    (nconc (nreverse exact) (nreverse wildcard))))
+    (nconc exact wildcard)))

 
 (defun mailcap-unescape-mime-test (test type-info)
   (let (save-pos save-chr subst)
 
 (defun mailcap-unescape-mime-test (test type-info)
   (let (save-pos save-chr subst)


@@ -522,18 +624,18 @@ If FORCE, re-parse even if already parsed."
            (setq save-pos (point))
            (skip-chars-forward "%")
            (setq save-chr (char-after (point)))
            (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)) "\"\"")))
            (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 ?{)
              (delete-region save-pos (progn (forward-char 1) (point)))
              (insert "\"\""))
             ((= save-chr ?{)


@@ -545,44 +647,45 @@ If FORCE, re-parse even if already parsed."
              (insert (or (cdr (assoc subst type-info)) "\"\"")))
             (t nil))))
        (buffer-string)))
              (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)
 
 (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 if 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)
         (viewer (cdr (assoc 'viewer viewer-info)))
         (default-directory (expand-file-name "~/"))
         status parsed-test cache result)
   (let* ((test-info (assq 'test viewer-info))
         (test (cdr test-info))
         (otest test)
         (viewer (cdr (assoc 'viewer viewer-info)))
         (default-directory (expand-file-name "~/"))
         status parsed-test cache result)

-    (if (setq cache (assoc test mailcap-viewer-test-cache))
-       (cadr cache)
-      (setq
-       result
-       (cond
-       ((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))
-        (funcall test type-info))
-       ((and (symbolp test)            ; Lisp variable as test
-             (boundp test))
-        (symbol-value test))
-       ((and (listp test)              ; List to be eval'd
-             (symbolp (car test)))
-        (eval test))
-       (t
-        (setq test (mailcap-unescape-mime-test test type-info)
-              test (list shell-file-name nil nil nil
-                         shell-command-switch test)
-              status (apply 'call-process test))
-        (= 0 status))))
-      (push (list otest result) mailcap-viewer-test-cache)
-      result)))
+    (cond ((setq cache (assoc test mailcap-viewer-test-cache))
+          (cadr cache))
+         ((not test-info) t)           ; No test clause
+         (t
+          (setq
+           result
+           (cond
+            ((not test) nil)           ; Already failed test
+            ((eq test t) t)            ; Already passed test
+            ((functionp test)          ; Lisp function as test
+             (funcall test type-info))
+            ((and (symbolp test)       ; Lisp variable as test
+                  (boundp test))
+             (symbol-value test))
+            ((and (listp test)         ; List to be eval'd
+                  (symbolp (car test)))
+             (eval test))
+            (t
+             (setq test (mailcap-unescape-mime-test test type-info)
+                   test (list shell-file-name nil nil nil
+                              shell-command-switch test)
+                   status (apply 'call-process test))
+             (eq 0 status))))
+          (push (list otest result) mailcap-viewer-test-cache)
+          result))))

 
 (defun mailcap-add-mailcap-entry (major minor info)
   (let ((old-major (assoc major mailcap-mime-data)))
 
 (defun mailcap-add-mailcap-entry (major minor info)
   (let ((old-major (assoc major mailcap-mime-data)))


@@ -596,10 +699,13 @@ If FORCE, re-parse even if already parsed."
              (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
              (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)))
+              (not (assq 'test cur-minor))
+              (equal (assq 'viewer info)  ; Keep alternative viewer
+                     (assq 'viewer cur-minor)))

          (setcdr cur-minor info))
         (t
          (setcdr cur-minor info))
         (t

-         (setcdr old-major (cons (cons minor info) (cdr old-major)))))))))
+         (setcdr old-major (cons (cons minor info) (cdr old-major))))))
+      )))

 
 (defun mailcap-add (type viewer &optional test)
   "Add VIEWER as a handler for TYPE.
 
 (defun mailcap-add (type viewer &optional test)
   "Add VIEWER as a handler for TYPE.


@@ -619,7 +725,7 @@ If TEST is not given, it defaults to t."
 ;;;
 
 (defun mailcap-viewer-lessp (x y)
 ;;;
 
 (defun mailcap-viewer-lessp (x y)

-  ;; Return t iff viewer X is more desirable than viewer Y
+  "Return t if 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)) ""))))
   (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)) ""))))


@@ -633,7 +739,7 @@ If TEST is not given, it defaults to t."
       t)
      (t nil))))
 
       t)
      (t nil))))
 

-(defun mailcap-mime-info (string &optional request)
+(defun mailcap-mime-info (string &optional request no-decode)

   "Get the MIME viewer command for STRING, return nil if none found.
 Expects a complete content-type header line as its argument.
 
   "Get the MIME viewer command for STRING, return nil if none found.
 Expects a complete content-type header line as its argument.
 


@@ -643,7 +749,11 @@ entry) will be returned.  If it is a string, then the mailcap field
 corresponding to that string will be returned (print, description,
 whatever).  If a number, then all the information for this specific
 viewer is returned.  If `all', then all possible viewers for
 corresponding to that string will be returned (print, description,
 whatever).  If a number, then all the information for this specific
 viewer is returned.  If `all', then all possible viewers for

-this type is returned."
+this type is returned.
+
+If NO-DECODE is non-nil, don't decode STRING."
+  ;; NO-DECODE avoids calling `mail-header-parse-content-type' from
+  ;; `mail-parse.el'

   (let (
        major                           ; Major encoding (text, etc)
        minor                           ; Minor encoding (html, etc)
   (let (
        major                           ; Major encoding (text, etc)
        minor                           ; Minor encoding (html, etc)


@@ -657,7 +767,10 @@ this type is returned."
        viewer                          ; The one and only viewer
        ctl)
     (save-excursion
        viewer                          ; The one and only viewer
        ctl)
     (save-excursion

-      (setq ctl (mail-header-parse-content-type (or string "text/plain")))
+      (setq ctl
+           (if no-decode
+               (list (or string "text/plain"))
+             (mail-header-parse-content-type (or string "text/plain"))))

       (setq major (split-string (car ctl) "/"))
       (setq minor (cadr major)
            major (car major))
       (setq major (split-string (car ctl) "/"))
       (setq minor (cadr major)
            major (car major))


@@ -670,20 +783,19 @@ this type is returned."
            (if (mailcap-viewer-passes-test (car viewers) info)
                (setq passed (cons (car viewers) passed)))
            (setq viewers (cdr viewers)))
            (if (mailcap-viewer-passes-test (car viewers) info)
                (setq passed (cons (car viewers) passed)))
            (setq viewers (cdr viewers)))

-         (setq passed (sort (nreverse passed) 'mailcap-viewer-lessp))
+         (setq passed (sort passed 'mailcap-viewer-lessp))

          (setq viewer (car passed))))
       (when (and (stringp (cdr (assq 'viewer viewer)))
                 passed)
        (setq viewer (car passed)))
       (cond
        ((and (null viewer) (not (equal major "default")) request)
          (setq viewer (car passed))))
       (when (and (stringp (cdr (assq 'viewer viewer)))
                 passed)
        (setq viewer (car passed)))
       (cond
        ((and (null viewer) (not (equal major "default")) request)

-       (mailcap-mime-info "default" request))
+       (mailcap-mime-info "default" request no-decode))

        ((or (null request) (equal request ""))
        (mailcap-unescape-mime-test (cdr (assq 'viewer viewer)) info))
        ((stringp request)
        ((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)) info))

        ((eq request 'all)
        passed)
        (t
        ((eq request 'all)
        passed)
        (t


@@ -700,136 +812,153 @@ this type is returned."
 ;;;
 
 (defvar mailcap-mime-extensions
 ;;;
 
 (defvar mailcap-mime-extensions

-  '((""          . "text/plain")
-    (".abs"      . "audio/x-mpeg")
-    (".aif"      . "audio/aiff")
-    (".aifc"     . "audio/aiff")
-    (".aiff"     . "audio/aiff")
-    (".ano"      . "application/x-annotator")
-    (".au"       . "audio/ulaw")
-    (".avi"      . "video/x-msvideo")
-    (".bcpio"    . "application/x-bcpio")
-    (".bin"      . "application/octet-stream")
-    (".cdf"      . "application/x-netcdr")
-    (".cpio"     . "application/x-cpio")
-    (".csh"      . "application/x-csh")
-    (".dvi"      . "application/x-dvi")
-    (".diff"     . "text/x-patch")
-    (".el"       . "application/emacs-lisp")
-    (".eps"      . "application/postscript")
-    (".etx"      . "text/x-setext")
-    (".exe"      . "application/octet-stream")
-    (".fax"      . "image/x-fax")
-    (".gif"      . "image/gif")
-    (".hdf"      . "application/x-hdf")
-    (".hqx"      . "application/mac-binhex40")
-    (".htm"      . "text/html")
-    (".html"     . "text/html")
-    (".icon"     . "image/x-icon")
-    (".ief"      . "image/ief")
-    (".jpg"      . "image/jpeg")
-    (".macp"     . "image/x-macpaint")
-    (".man"      . "application/x-troff-man")
-    (".me"       . "application/x-troff-me")
-    (".mif"      . "application/mif")
-    (".mov"      . "video/quicktime")
-    (".movie"    . "video/x-sgi-movie")
-    (".mp2"      . "audio/x-mpeg")
-    (".mp3"      . "audio/x-mpeg")
-    (".mp2a"     . "audio/x-mpeg2")
-    (".mpa"      . "audio/x-mpeg")
-    (".mpa2"     . "audio/x-mpeg2")
-    (".mpe"      . "video/mpeg")
-    (".mpeg"     . "video/mpeg")
-    (".mpega"    . "audio/x-mpeg")
-    (".mpegv"    . "video/mpeg")
-    (".mpg"      . "video/mpeg")
-    (".mpv"      . "video/mpeg")
-    (".ms"       . "application/x-troff-ms")
-    (".nc"       . "application/x-netcdf")
-    (".nc"       . "application/x-netcdf")
-    (".oda"      . "application/oda")
-    (".patch"    . "text/x-patch")
-    (".pbm"      . "image/x-portable-bitmap")
-    (".pdf"      . "application/pdf")
-    (".pgm"      . "image/portable-graymap")
-    (".pict"     . "image/pict")
-    (".png"      . "image/png")
-    (".pnm"      . "image/x-portable-anymap")
-    (".ppm"      . "image/portable-pixmap")
-    (".ps"       . "application/postscript")
-    (".qt"       . "video/quicktime")
-    (".ras"      . "image/x-raster")
-    (".rgb"      . "image/x-rgb")
-    (".rtf"      . "application/rtf")
-    (".rtx"      . "text/richtext")
-    (".sh"       . "application/x-sh")
-    (".sit"      . "application/x-stuffit")
-    (".snd"      . "audio/basic")
-    (".src"      . "application/x-wais-source")
-    (".tar"      . "archive/tar")
-    (".tcl"      . "application/x-tcl")
-    (".tcl"      . "application/x-tcl")
-    (".tex"      . "application/x-tex")
-    (".texi"     . "application/texinfo")
-    (".tga"      . "image/x-targa")
-    (".tif"      . "image/tiff")
-    (".tiff"     . "image/tiff")
-    (".tr"       . "application/x-troff")
-    (".troff"    . "application/x-troff")
-    (".tsv"      . "text/tab-separated-values")
-    (".txt"      . "text/plain")
-    (".vbs"      . "video/mpeg")
-    (".vox"      . "audio/basic")
-    (".vrml"     . "x-world/x-vrml")
-    (".wav"      . "audio/x-wav")
-    (".wrl"      . "x-world/x-vrml")
-    (".xbm"      . "image/xbm")
-    (".xpm"      . "image/xpm")
-    (".xwd"      . "image/windowdump")
-    (".zip"      . "application/zip")
-    (".ai"       . "application/postscript")
-    (".jpe"      . "image/jpeg")
-    (".jpeg"     . "image/jpeg"))
-  "An assoc list of file extensions and corresponding MIME content-types.")
-
-(defun mailcap-parse-mimetypes (&optional path)
-  ;; Parse out all the mimetypes specified in a unix-style path string PATH
-  (cond
-   (path nil)
-   ((getenv "MIMETYPES") (setq path (getenv "MIMETYPES")))
-   ((memq system-type '(ms-dos ms-windows windows-nt))
-    (setq path (mapconcat 'expand-file-name
-                         '("~/mime.typ" "~/etc/mime.typ") ";")))
-   (t (setq path (mapconcat
-                 'expand-file-name
-                 ;; mime.types seems to be the normal name,
-                 ;; definitely so on current GNUish systems.  The
-                 ;; ordering follows that for mailcap.
-                 '("~/.mime.types"
-                   "/etc/mime.types"
-                   "/usr/etc/mime.types"
-                   "/usr/local/etc/mime.types"
-                   "/usr/local/www/conf/mime.types"
-                   "~/.mime-types"
-                   "/etc/mime-types"
-                   "/usr/etc/mime-types"
-                   "/usr/local/etc/mime-types"
-                   "/usr/local/www/conf/mime-types") ":"))))
-  (let ((fnames (reverse
-                (split-string path
-                              (if (memq system-type
-                                        '(ms-dos ms-windows windows-nt))
-                                  ";" ":"))))
-       fname)
-    (while fnames
-      (setq fname (car fnames))
-      (if (and (file-exists-p fname) (file-readable-p fname))
-         (mailcap-parse-mimetype-file (car fnames)))
-      (setq fnames (cdr fnames)))))
+  '((""       . "text/plain")
+    (".1"     . "text/plain")  ;; Manual pages
+    (".3"     . "text/plain")
+    (".8"     . "text/plain")
+    (".abs"   . "audio/x-mpeg")
+    (".aif"   . "audio/aiff")
+    (".aifc"  . "audio/aiff")
+    (".aiff"  . "audio/aiff")
+    (".ano"   . "application/x-annotator")
+    (".au"    . "audio/ulaw")
+    (".avi"   . "video/x-msvideo")
+    (".bcpio" . "application/x-bcpio")
+    (".bin"   . "application/octet-stream")
+    (".cdf"   . "application/x-netcdr")
+    (".cpio"  . "application/x-cpio")
+    (".csh"   . "application/x-csh")
+    (".css"   . "text/css")
+    (".dvi"   . "application/x-dvi")
+    (".diff"  . "text/x-patch")
+    (".dpatch". "test/x-patch")
+    (".el"    . "application/emacs-lisp")
+    (".eps"   . "application/postscript")
+    (".etx"   . "text/x-setext")
+    (".exe"   . "application/octet-stream")
+    (".fax"   . "image/x-fax")
+    (".gif"   . "image/gif")
+    (".hdf"   . "application/x-hdf")
+    (".hqx"   . "application/mac-binhex40")
+    (".htm"   . "text/html")
+    (".html"  . "text/html")
+    (".icon"  . "image/x-icon")
+    (".ief"   . "image/ief")
+    (".jpg"   . "image/jpeg")
+    (".macp"  . "image/x-macpaint")
+    (".man"   . "application/x-troff-man")
+    (".me"    . "application/x-troff-me")
+    (".mif"   . "application/mif")
+    (".mov"   . "video/quicktime")
+    (".movie" . "video/x-sgi-movie")
+    (".mp2"   . "audio/x-mpeg")
+    (".mp3"   . "audio/x-mpeg")
+    (".mp2a"  . "audio/x-mpeg2")
+    (".mpa"   . "audio/x-mpeg")
+    (".mpa2"  . "audio/x-mpeg2")
+    (".mpe"   . "video/mpeg")
+    (".mpeg"  . "video/mpeg")
+    (".mpega" . "audio/x-mpeg")
+    (".mpegv" . "video/mpeg")
+    (".mpg"   . "video/mpeg")
+    (".mpv"   . "video/mpeg")
+    (".ms"    . "application/x-troff-ms")
+    (".nc"    . "application/x-netcdf")
+    (".nc"    . "application/x-netcdf")
+    (".oda"   . "application/oda")
+    (".patch" . "text/x-patch")
+    (".pbm"   . "image/x-portable-bitmap")
+    (".pdf"   . "application/pdf")
+    (".pgm"   . "image/portable-graymap")
+    (".pict"  . "image/pict")
+    (".png"   . "image/png")
+    (".pnm"   . "image/x-portable-anymap")
+    (".pod"   . "text/plain")
+    (".ppm"   . "image/portable-pixmap")
+    (".ps"    . "application/postscript")
+    (".qt"    . "video/quicktime")
+    (".ras"   . "image/x-raster")
+    (".rgb"   . "image/x-rgb")
+    (".rtf"   . "application/rtf")
+    (".rtx"   . "text/richtext")
+    (".sh"    . "application/x-sh")
+    (".sit"   . "application/x-stuffit")
+    (".siv"   . "application/sieve")
+    (".snd"   . "audio/basic")
+    (".soa"   . "text/dns")
+    (".src"   . "application/x-wais-source")
+    (".tar"   . "archive/tar")
+    (".tcl"   . "application/x-tcl")
+    (".tex"   . "application/x-tex")
+    (".texi"  . "application/texinfo")
+    (".tga"   . "image/x-targa")
+    (".tif"   . "image/tiff")
+    (".tiff"  . "image/tiff")
+    (".tr"    . "application/x-troff")
+    (".troff" . "application/x-troff")
+    (".tsv"   . "text/tab-separated-values")
+    (".txt"   . "text/plain")
+    (".vbs"   . "video/mpeg")
+    (".vox"   . "audio/basic")
+    (".vrml"  . "x-world/x-vrml")
+    (".wav"   . "audio/x-wav")
+    (".xls"   . "application/vnd.ms-excel")
+    (".wrl"   . "x-world/x-vrml")
+    (".xbm"   . "image/xbm")
+    (".xpm"   . "image/xpm")
+    (".xwd"   . "image/windowdump")
+    (".zip"   . "application/zip")
+    (".ai"    . "application/postscript")
+    (".jpe"   . "image/jpeg")
+    (".jpeg"  . "image/jpeg")
+    (".org"   . "text/x-org"))
+  "An alist of file extensions and corresponding MIME content-types.
+This exists for you to customize the information in Lisp.  It is
+merged with values from mailcap files by `mailcap-parse-mimetypes'.")
+
+(defvar mailcap-mimetypes-parsed-p nil)
+
+(defun mailcap-parse-mimetypes (&optional path force)
+  "Parse out all the mimetypes specified in a Unix-style path string PATH.
+Components of PATH are separated by the `path-separator' character
+appropriate for this system.  If PATH is omitted, use the value of
+environment variable MIMETYPES if set; otherwise use a default path.
+If FORCE, re-parse even if already parsed."
+  (interactive (list nil t))
+  (when (or (not mailcap-mimetypes-parsed-p)
+           force)
+    (cond
+     (path nil)
+     ((getenv "MIMETYPES") (setq path (getenv "MIMETYPES")))
+     ((memq system-type mailcap-poor-system-types)
+      (setq path '("~/mime.typ" "~/etc/mime.typ")))
+     (t (setq path
+             ;; mime.types seems to be the normal name, definitely so
+             ;; on current GNUish systems.  The search order follows
+             ;; that for mailcap.
+             '("~/.mime.types"
+               "/etc/mime.types"
+               "/usr/etc/mime.types"
+               "/usr/local/etc/mime.types"
+               "/usr/local/www/conf/mime.types"
+               "~/.mime-types"
+               "/etc/mime-types"
+               "/usr/etc/mime-types"
+               "/usr/local/etc/mime-types"
+               "/usr/local/www/conf/mime-types"))))
+    (let ((fnames (reverse (if (stringp path)
+                              (split-string path path-separator t)
+                            path)))
+         fname)
+      (while fnames
+       (setq fname (car fnames))
+       (if (and (file-readable-p fname))
+           (mailcap-parse-mimetype-file fname))
+       (setq fnames (cdr fnames))))
+    (setq mailcap-mimetypes-parsed-p t)))

 
 (defun mailcap-parse-mimetype-file (fname)
 
 (defun mailcap-parse-mimetype-file (fname)

-  ;; Parse out a mime-types file
+  "Parse out a mime-types file FNAME."

   (let (type                           ; The MIME type for this line
        extns                           ; The extensions for this line
        save-pos                        ; Misc. saved buffer positions
   (let (type                           ; The MIME type for this line
        extns                           ; The extensions for this line
        save-pos                        ; Misc. saved buffer positions


@@ -846,7 +975,7 @@ this type is returned."
       (while (not (eobp))
        (skip-chars-forward " \t\n")
        (setq save-pos (point))
       (while (not (eobp))
        (skip-chars-forward " \t\n")
        (setq save-pos (point))

-       (skip-chars-forward "^ \t")
+       (skip-chars-forward "^ \t\n")

        (downcase-region save-pos (point))
        (setq type (buffer-substring save-pos (point)))
        (while (not (eolp))
        (downcase-region save-pos (point))
        (setq type (buffer-substring save-pos (point)))
        (while (not (eolp))


@@ -865,35 +994,96 @@ this type is returned."
 
 (defun mailcap-extension-to-mime (extn)
   "Return the MIME content type of the file extensions EXTN."
 
 (defun mailcap-extension-to-mime (extn)
   "Return the MIME content type of the file extensions EXTN."

+  (mailcap-parse-mimetypes)

   (if (and (stringp extn)
           (not (eq (string-to-char extn) ?.)))
       (setq extn (concat "." extn)))
   (cdr (assoc (downcase extn) mailcap-mime-extensions)))
 
   (if (and (stringp extn)
           (not (eq (string-to-char extn) ?.)))
       (setq extn (concat "." extn)))
   (cdr (assoc (downcase extn) mailcap-mime-extensions)))
 

-(defvar mailcap-binary-suffixes
-  (if (memq system-type '(ms-dos windows-nt))
-      '(".exe" ".com" ".bat" ".cmd" ".btm" "")
-    '("")))
-
-(defun mailcap-command-p (command)
-  "Say whether COMMAND is in the exec path.
-The path of COMMAND will be returned iff COMMAND is a command."
-  (let ((path (if (file-name-absolute-p command) '(nil) exec-path))
-       file dir)
-    (catch 'found
-      (while (setq dir (pop path))
-       (let ((suffixes mailcap-binary-suffixes))
-         (while suffixes
-           (when (and (file-executable-p
-                       (setq file (expand-file-name
-                                   (concat command (pop suffixes))
-                                   dir)))
-                      (not (file-directory-p file)))
-             (throw 'found file))))))))
+;; Unused?
+(defalias 'mailcap-command-p 'executable-find)

 
 (defun mailcap-mime-types ()
   "Return a list of MIME media types."
 
 (defun mailcap-mime-types ()
   "Return a list of MIME media types."

-  (mm-delete-duplicates (mapcar 'cdr mailcap-mime-extensions)))
+  (mailcap-parse-mimetypes)
+  (mailcap-delete-duplicates
+   (nconc
+    (mapcar 'cdr mailcap-mime-extensions)
+    (apply
+     'nconc
+     (mapcar
+      (lambda (l)
+       (delq nil
+             (mapcar
+              (lambda (m)
+                (let ((type (cdr (assq 'type (cdr m)))))
+                  (if (equal (cadr (split-string type "/"))
+                             "*")
+                      nil
+                    type)))
+              (cdr l))))
+      mailcap-mime-data)))))
+
+;;;
+;;; Useful supplementary functions
+;;;
+
+(defun mailcap-file-default-commands (files)
+  "Return a list of default commands for FILES."
+  (mailcap-parse-mailcaps)
+  (mailcap-parse-mimetypes)
+  (let* ((all-mime-type
+         ;; All unique MIME types from file extensions
+         (mailcap-delete-duplicates
+          (mapcar (lambda (file)
+                    (mailcap-extension-to-mime
+                     (file-name-extension file t)))
+                  files)))
+        (all-mime-info
+         ;; All MIME info lists
+         (mailcap-delete-duplicates
+          (mapcar (lambda (mime-type)
+                    (mailcap-mime-info mime-type 'all))
+                  all-mime-type)))
+        (common-mime-info
+         ;; Intersection of mime-infos from different mime-types;
+         ;; or just the first MIME info for a single MIME type
+         (if (cdr all-mime-info)
+             (delq nil (mapcar (lambda (mi1)
+                                 (unless (memq nil (mapcar
+                                                    (lambda (mi2)
+                                                      (member mi1 mi2))
+                                                    (cdr all-mime-info)))
+                                   mi1))
+                               (car all-mime-info)))
+           (car all-mime-info)))
+        (commands
+         ;; Command strings from `viewer' field of the MIME info
+         (mailcap-delete-duplicates
+          (delq nil (mapcar (lambda (mime-info)
+                              (let ((command (cdr (assoc 'viewer mime-info))))
+                                (if (stringp command)
+                                    (mailcap-replace-in-string
+                                     ;; Replace mailcap's `%s' placeholder
+                                     ;; with dired's `?' placeholder
+                                     (mailcap-replace-in-string
+                                      ;; Remove the final filename placeholder
+                                      command "[ \t\n]*\\('\\)?%s\\1?[ \t\n]*\\'" "" t)
+                                     "%s" "?" t))))
+                            common-mime-info)))))
+    commands))
+
+(defun mailcap-view-mime (type)
+  "View the data in the current buffer that has MIME type TYPE.
+`mailcap-mime-data' determines the method to use."
+  (let ((method (mailcap-mime-info type)))
+    (if (stringp method)
+       (shell-command-on-region (point-min) (point-max)
+                                ;; Use stdin as the "%s".
+                                (format method "-")
+                                (current-buffer)
+                                t)
+      (funcall method))))

 
 (provide 'mailcap)
 
 
 (provide 'mailcap)