Emacs Online Documentation

mailcap-mime-data

mailcap-mime-data is a variable defined in `mailcap.el'.
Its value is shown below.

This variable may be risky if used as a file-local variable.

Documentation:
The mailcap structure is an assoc list of assoc lists.
1st assoc list is keyed on the major content-type
2nd assoc list is keyed on the minor content-type (which can be a regexp)

Which looks like:
-----------------
(("application"
("postscript" . ))
("text"
("plain" . )))

Where is another assoc list of the various information
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")
FLAG)

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'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.

Value:



(("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)
   (type . "application/x-x509-ca-cert"))
  ("x-x509-user-cert"
   (viewer . ssl-view-user-cert)
   (test fboundp 'ssl-view-user-cert)
   (type . "application/x-x509-user-cert"))
  ("octet-stream"
   (viewer . mailcap-save-binary-file)
   (non-viewer . t)
   (type . "application/octet-stream"))
  ("dvi"
   (viewer . "xdvi -safer %s")
   (test eq window-system 'x)
   ("needsx11")
   (type . "application/dvi")
   ("print" . "dvips -qRP %s"))
  ("dvi"
   (viewer . "dvitty %s")
   (test not
	 (getenv "DISPLAY"))
   (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)
   (type . "application/x-tar"))
  ("x-latex"
   (viewer . tex-mode)
   (test fboundp 'tex-mode)
   (type . "application/x-latex"))
  ("x-tex"
   (viewer . tex-mode)
   (test fboundp 'tex-mode)
   (type . "application/x-tex"))
  ("latex"
   (viewer . tex-mode)
   (test fboundp 'tex-mode)
   (type . "application/latex"))
  ("tex"
   (viewer . tex-mode)
   (test fboundp 'tex-mode)
   (type . "application/tex"))
  ("texinfo"
   (viewer . texinfo-mode)
   (test fboundp 'texinfo-mode)
   (type . "application/tex"))
  ("zip"
   (viewer . mailcap-save-binary-file)
   (non-viewer . t)
   (type . "application/zip")
   ("copiousoutput"))
  ("pdf"
   (viewer . doc-view-mode)
   (type . "application/pdf")
   (test eq window-system 'x))
  ("pdf"
   (viewer . "gv -safer %s")
   (type . "application/pdf")
   (test . window-system)
   ("print" . "pdf2ps %s - | lpr"))
  ("pdf"
   (viewer . "gpdf %s")
   (type . "application/pdf")
   ("print" . "pdftops %s - | lpr")
   (test eq window-system 'x))
  ("pdf"
   (viewer . "xpdf %s")
   (type . "application/pdf")
   ("print" . "pdftops %s - | lpr")
   (test eq window-system 'x))
  ("pdf"
   (viewer . "pdftotext %s -")
   (type . "application/pdf")
   ("print" . "pdftops %s - | lpr")
   ("copiousoutput"))
  ("postscript"
   (viewer . "gv -safer %s")
   (type . "application/postscript")
   (test . window-system)
   ("print" . "lpr %s")
   ("needsx11"))
  ("postscript"
   (viewer . "ghostview -dSAFER %s")
   (type . "application/postscript")
   (test eq window-system 'x)
   ("print" . "lpr %s")
   ("needsx11"))
  ("postscript"
   (viewer . "ps2ascii %s")
   (type . "application/postscript")
   (test not
	 (getenv "DISPLAY"))
   ("print" . "lpr %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 . "audio/x-mpeg"))
  (".*"
   (viewer . "showaudio")
   (type . "audio/*")))
 ("message"
  ("rfc-*822"
   (viewer . mm-view-message)
   (test and
	 (featurep 'gnus)
	 (gnus-alive-p))
   (type . "message/rfc822"))
  ("rfc-*822"
   (viewer . vm-mode)
   (test fboundp 'vm-mode)
   (type . "message/rfc822"))
  ("rfc-*822"
   (viewer . view-mode)
   (type . "message/rfc822")))
 ("image"
  ("x-xwd"
   (viewer . "xwud -in %s")
   (type . "image/x-xwd")
   ("compose" . "xwd -frame > %s")
   (test eq window-system 'x)
   ("needsx11"))
  ("x11-dump"
   (viewer . "xwud -in %s")
   (type . "image/x-xwd")
   ("compose" . "xwd -frame > %s")
   (test eq window-system 'x)
   ("needsx11"))
  ("windowdump"
   (viewer . "xwud -in %s")
   (type . "image/x-xwd")
   ("compose" . "xwd -frame > %s")
   (test eq window-system 'x)
   ("needsx11"))
  (".*"
   (viewer . "display %s")
   (type . "image/*")
   (test eq window-system 'x)
   ("needsx11"))
  (".*"
   (viewer . "ee %s")
   (type . "image/*")
   (test eq window-system 'x)
   ("needsx11")))
 ("text"
  ("plain"
   (viewer . view-mode)
   (test fboundp 'view-mode)
   (type . "text/plain"))
  ("plain"
   (viewer . fundamental-mode)
   (type . "text/plain"))
  ("enriched"
   (viewer . enriched-decode)
   (test fboundp 'enriched-decode)
   (type . "text/enriched"))
  ("dns"
   (viewer . dns-mode)
   (test fboundp 'dns-mode)
   (type . "text/dns")))
 ("video"
  ("mpeg"
   (viewer . "mpeg_play %s")
   (type . "video/mpeg")
   (test eq window-system 'x)
   ("needsx11")))
 ("x-world"
  ("x-vrml"
   (viewer . "webspace -remote %s -URL %u")
   (type . "x-world/x-vrml")
   ("description" "VRML document")))
 ("archive"
  ("tar"
   (viewer . tar-mode)
   (type . "archive/tar")
   (test fboundp 'tar-mode))))