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Diffstat (limited to 'lisp/gnus/mailcap.el')
| -rw-r--r-- | lisp/gnus/mailcap.el | 1077 |
1 files changed, 0 insertions, 1077 deletions
diff --git a/lisp/gnus/mailcap.el b/lisp/gnus/mailcap.el deleted file mode 100644 index bf7ba0817ea..00000000000 --- a/lisp/gnus/mailcap.el +++ /dev/null @@ -1,1077 +0,0 @@ -;;; mailcap.el --- MIME media types configuration - -;; Copyright (C) 1998-2016 Free Software Foundation, Inc. - -;; Author: William M. Perry <wmperry@aventail.com> -;; Lars Magne Ingebrigtsen <larsi@gnus.org> -;; Keywords: news, mail, multimedia - -;; This file is part of GNU Emacs. - -;; GNU Emacs is free software: you can redistribute it and/or modify -;; it under the terms of the GNU General Public License as published by -;; 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 -;; 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 -;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. - -;;; 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)) -(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))) - (modify-syntax-entry ?' "\"" table) - (modify-syntax-entry ?` "\"" table) - (modify-syntax-entry ?{ "(" table) - (modify-syntax-entry ?} ")" table) - table) - "A syntax table for parsing SGML attributes.") - -(eval-and-compile - (when (featurep 'xemacs) - (condition-case nil - (require 'lpr) - (error nil)))) - -(defvar mailcap-print-command - (mapconcat 'identity - (cons (if (boundp 'lpr-command) - lpr-command - "lpr") - (when (boundp 'lpr-switches) - (if (stringp lpr-switches) - (list lpr-switches) - lpr-switches))) - " ") - "Shell command (including switches) used to print PostScript files.") - -;; Postpone using defcustom for this as it's so big and we essentially -;; have to have two copies of the data around then. Perhaps just -;; customize the Lisp viewers and rely on the normal configuration -;; files for the rest? -- fx -(defvar mailcap-mime-data - `(("application" - ("vnd\\.ms-excel" - (viewer . "gnumeric %s") - (test . (getenv "DISPLAY")) - (type . "application/vnd.ms-excel")) - ("x-x509-ca-cert" - (viewer . ssl-view-site-cert) - (type . "application/x-x509-ca-cert")) - ("x-x509-user-cert" - (viewer . 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) - (type . "application/x-latex")) - ("x-tex" - (viewer . tex-mode) - (type . "application/x-tex")) - ("latex" - (viewer . tex-mode) - (type . "application/latex")) - ("tex" - (viewer . tex-mode) - (type . "application/tex")) - ("texinfo" - (viewer . texinfo-mode) - (type . "application/tex")) - ("zip" - (viewer . mailcap-save-binary-file) - (non-viewer . t) - (type . "application/zip") - ("copiousoutput")) - ("pdf" - (viewer . pdf-view-mode) - (type . "application/pdf") - (test . (eq window-system 'x))) - ("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" . ,(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" - (viewer . "gv -safer %s") - (type . "application/postscript") - (test . window-system) - ("print" . ,(concat mailcap-print-command " %s")) - ("needsx11")) - ("postscript" - (viewer . "ghostview -dSAFER %s") - (type . "application/postscript") - (test . (eq window-system 'x)) - ("print" . ,(concat mailcap-print-command " %s")) - ("needsx11")) - ("postscript" - (viewer . "ps2ascii %s") - (type . "application/postscript") - (test . (not (getenv "DISPLAY"))) - ("print" . ,(concat mailcap-print-command " %s")) - ("copiousoutput")) - ("sieve" - (viewer . 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) - (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) - (type . "text/plain")) - ("plain" - (viewer . fundamental-mode) - (type . "text/plain")) - ("enriched" - (viewer . enriched-decode) - (type . "text/enriched")) - ("dns" - (viewer . 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")))) - "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\" . <info>)) - (\"text\" - (\"plain\" . <info>))) - -Where <info> 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 if -and only if it exists as a function, 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.") -(put 'mailcap-mime-data 'risky-local-variable t) - -(defcustom mailcap-download-directory nil - "*Directory to which `mailcap-save-binary-file' downloads files by default. -nil means your home directory." - :type '(choice (const :tag "Home directory" nil) - directory) - :group 'mailcap) - -(defvar mailcap-poor-system-types - '(ms-dos windows-nt) - "Systems that don't have a Unix-like directory hierarchy.") - -;;; -;;; Utility functions -;;; - -(defun mailcap-save-binary-file () - (goto-char (point-min)) - (unwind-protect - (let ((file (read-file-name - "Filename to save as: " - (or mailcap-download-directory "~/"))) - (require-final-newline nil)) - (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 () - "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 -;;; - -(defun mailcap-replace-regexp (regexp to-string) - ;; Quiet replace-regexp. - (goto-char (point-min)) - (while (re-search-forward regexp nil t) - (replace-match to-string t nil))) - -(defvar mailcap-parsed-p nil) - -(defun mailcap-parse-mailcaps (&optional path force) - "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"))) - ((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 - (if (stringp path) - (split-string path path-separator t) - path))) - fname) - (while fnames - (setq fname (car fnames)) - (if (and (file-readable-p fname) - (file-regular-p fname)) - (mailcap-parse-mailcap fname)) - (setq fnames (cdr fnames)))) - (setq mailcap-parsed-p t))) - -(defun mailcap-parse-mailcap (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 - viewer ; How to view this mime type - info ; Misc info about this mime type - ) - (with-temp-buffer - (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 - (goto-char (point-max)) - (skip-chars-backward " \t\n") - (delete-region (point) (point-max)) - (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))) - (skip-chars-forward " \t") - (setq minor "") - (when (eq (char-after) ?/) - (forward-char) - (skip-chars-forward " \t") - (setq save-pos (point)) - (skip-chars-forward "^; \t\n") - (downcase-region save-pos (point)) - (setq minor - (cond - ((eq ?* (or (char-after save-pos) 0)) ".*") - ((= (point) save-pos) ".*") - (t (regexp-quote (buffer-substring save-pos (point))))))) - (skip-chars-forward " \t") - ;;; Got the major/minor chunks, now for the viewers/etc - ;;; The first item _must_ be a viewer, according to the - ;;; RFC for mailcap files (#1524) - (setq viewer "") - (when (eq (char-after) ?\;) - (forward-char) - (skip-chars-forward " \t") - (setq save-pos (point)) - (skip-chars-forward "^;\n") - ;; skip \; - (while (eq (char-before) ?\\) - (backward-delete-char 1) - (forward-char) - (skip-chars-forward "^;\n")) - (if (eq (or (char-after save-pos) 0) ?') - (setq viewer (progn - (narrow-to-region (1+ save-pos) (point)) - (goto-char (point-min)) - (prog1 - (read (current-buffer)) - (goto-char (point-max)) - (widen)))) - (setq viewer (buffer-substring save-pos (point))))) - (setq save-pos (point)) - (end-of-line) - (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) - (mailcap-add-mailcap-entry major minor info)) - (beginning-of-line))))) - -(defun mailcap-parse-mailcap-extras (st nd) - "Grab all the extra stuff from a mailcap entry." - (let ( - name ; From name= - value ; its value - results ; Assoc list of results - name-pos ; Start of XXXX= position - val-pos ; Start of value position - done ; Found end of \'d ;s? - ) - (save-restriction - (narrow-to-region st nd) - (goto-char (point-min)) - (skip-chars-forward " \n\t;") - (while (not (eobp)) - (setq done nil) - (setq name-pos (point)) - (skip-chars-forward "^ \n\t=;") - (downcase-region name-pos (point)) - (setq name (buffer-substring name-pos (point))) - (skip-chars-forward " \t\n") - (if (not (eq (char-after (point)) ?=)) ; There is no value - (setq value t) - (skip-chars-forward " \t\n=") - (setq val-pos (point)) - (if (memq (char-after val-pos) '(?\" ?')) - (progn - (setq val-pos (1+ val-pos)) - (condition-case nil - (progn - (forward-sexp 1) - (backward-char 1)) - (error (goto-char (point-max))))) - (while (not done) - (skip-chars-forward "^;") - (if (eq (char-after (1- (point))) ?\\ ) - (progn - (subst-char-in-region (1- (point)) (point) ?\\ ? ) - (skip-chars-forward ";")) - (setq done t)))) - (setq value (buffer-substring val-pos (point)))) - ;; `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) - "Replace the test clause of INFO itself with a boolean for some cases. -This function supports only `test -n $DISPLAY' and `test -z $DISPLAY', -replaces them with t or nil. As for others or if INFO has a interactive -spec (needsterm, needsterminal, or needsx11) but DISPLAY is not set, -the test clause will be unchanged." - (let ((test (assq 'test info)) ; The test clause - status) - (setq status (and test (split-string (cdr test) " "))) - (if (and (or (assoc "needsterm" info) - (assoc "needsterminal" info) - (assoc "needsx11" info)) - (not (getenv "DISPLAY"))) - (setq status nil) - (cond - ((and (equal (nth 0 status) "test") - (equal (nth 1 status) "-n") - (or (equal (nth 2 status) "$DISPLAY") - (equal (nth 2 status) "\"$DISPLAY\""))) - (setq status (if (getenv "DISPLAY") t nil))) - ((and (equal (nth 0 status) "test") - (equal (nth 1 status) "-z") - (or (equal (nth 2 status) "$DISPLAY") - (equal (nth 2 status) "\"$DISPLAY\""))) - (setq status (if (getenv "DISPLAY") nil t))) - (test nil) - (t nil))) - (and test (listp test) (setcdr test status)))) - -;;; -;;; The action routines. -;;; - -(defun mailcap-possible-viewers (major minor) - "Return a list of possible viewers from MAJOR for minor type MINOR." - (let ((exact '()) - (wildcard '())) - (while major - (cond - ((equal (car (car major)) minor) - (setq exact (cons (cdr (car major)) exact))) - ((and minor (string-match (concat "^" (car (car major)) "$") minor)) - (setq wildcard (cons (cdr (car major)) wildcard)))) - (setq major (cdr major))) - (nconc exact wildcard))) - -(defun mailcap-unescape-mime-test (test type-info) - (let (save-pos save-chr subst) - (cond - ((symbolp test) test) - ((and (listp test) (symbolp (car test))) test) - ((or (stringp test) - (and (listp test) (stringp (car test)) - (setq test (mapconcat 'identity test " ")))) - (with-temp-buffer - (insert test) - (goto-char (point-min)) - (while (not (eobp)) - (skip-chars-forward "^%") - (if (/= (- (point) - (progn (skip-chars-backward "\\\\") - (point))) - 0) ; It is an escaped % - (progn - (delete-char 1) - (skip-chars-forward "%.")) - (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)) "\"\""))) - ((memq save-chr '(?M ?n ?F)) - (delete-region save-pos (progn (forward-char 1) (point))) - (insert "\"\"")) - ((= save-chr ?{) - (forward-char 1) - (skip-chars-forward "^}") - (downcase-region (+ 2 save-pos) (point)) - (setq subst (buffer-substring (+ 2 save-pos) (point))) - (delete-region save-pos (1+ (point))) - (insert (or (cdr (assoc subst type-info)) "\"\""))) - (t nil)))) - (buffer-string))) - (t (error "Bad value to mailcap-unescape-mime-test: %s" test))))) - -(defvar mailcap-viewer-test-cache nil) - -(defun mailcap-viewer-passes-test (viewer-info type-info) - "Return non-nil 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 (assq 'viewer viewer-info))) - (default-directory (expand-file-name "~/")) - status parsed-test cache result) - (cond ((not (or (stringp viewer) (fboundp viewer))) - nil) ; Non-existent Lisp function - ((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))) - (if (null old-major) ; New major area - (setq mailcap-mime-data - (cons (cons major (list (cons minor info))) - mailcap-mime-data)) - (let ((cur-minor (assoc minor old-major))) - (cond - ((or (null cur-minor) ; New minor area, or - (assq 'test info)) ; Has a test, insert at beginning - (setcdr old-major (cons (cons minor info) (cdr old-major)))) - ((and (not (assq 'test info)) ; No test info, replace completely - (not (assq 'test cur-minor)) - (equal (assq 'viewer info) ; Keep alternative viewer - (assq 'viewer cur-minor))) - (setcdr cur-minor info)) - (t - (setcdr old-major (cons (cons minor info) (cdr old-major)))))) - ))) - -(defun mailcap-add (type viewer &optional test) - "Add VIEWER as a handler for TYPE. -If TEST is not given, it defaults to t." - (let ((tl (split-string type "/"))) - (when (or (not (car tl)) - (not (cadr tl))) - (error "%s is not a valid MIME type" type)) - (mailcap-add-mailcap-entry - (car tl) (cadr tl) - `((viewer . ,viewer) - (test . ,(if test test t)) - (type . ,type))))) - -;;; -;;; The main whabbo -;;; - -(defun mailcap-viewer-lessp (x 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)) "")))) - (y-lisp (not (stringp (or (cdr-safe (assq 'viewer y)) ""))))) - (cond - ((and x-wild (not y-wild)) - nil) - ((and (not x-wild) y-wild) - t) - ((and (not y-lisp) x-lisp) - t) - (t nil)))) - -(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. - -Second argument REQUEST specifies what information to return. If it is -nil or the empty string, the viewer (second field of the mailcap -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 -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) - info ; Other info - save-pos ; Misc. position during parse - major-info ; (assoc major mailcap-mime-data) - minor-info ; (assoc minor major-info) - test ; current test proc. - viewers ; Possible viewers - passed ; Viewers that passed the test - viewer ; The one and only viewer - ctl) - (save-excursion - (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)) - (when (setq major-info (cdr (assoc major mailcap-mime-data))) - (when (setq viewers (mailcap-possible-viewers major-info minor)) - (setq info (mapcar (lambda (a) (cons (symbol-name (car a)) - (cdr a))) - (cdr ctl))) - (while viewers - (if (mailcap-viewer-passes-test (car viewers) info) - (setq passed (cons (car viewers) passed))) - (setq viewers (cdr viewers))) - (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) - (mailcap-mime-info "default" request no-decode)) - ((or (null request) (equal request "")) - (mailcap-unescape-mime-test (cdr (assq 'viewer viewer)) info)) - ((stringp request) - (mailcap-unescape-mime-test - (cdr-safe (assoc request viewer)) info)) - ((eq request 'all) - passed) - (t - ;; MUST make a copy *sigh*, else we modify mailcap-mime-data - (setq viewer (copy-sequence viewer)) - (let ((view (assq 'viewer viewer)) - (test (assq 'test viewer))) - (if view (setcdr view (mailcap-unescape-mime-test (cdr view) info))) - (if test (setcdr test (mailcap-unescape-mime-test (cdr test) info)))) - viewer))))) - -;;; -;;; Experimental MIME-types parsing -;;; - -(defvar mailcap-mime-extensions - '(("" . "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) - "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 - ) - (with-temp-buffer - (insert-file-contents fname) - (mailcap-replace-regexp "#.*" "") - (mailcap-replace-regexp "\n+" "\n") - (mailcap-replace-regexp "[ \t]+$" "") - (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") - (setq save-pos (point)) - (skip-chars-forward "^ \t\n") - (downcase-region save-pos (point)) - (setq type (buffer-substring save-pos (point))) - (while (not (eolp)) - (skip-chars-forward " \t") - (setq save-pos (point)) - (skip-chars-forward "^ \t\n") - (setq extns (cons (buffer-substring save-pos (point)) extns))) - (while extns - (setq mailcap-mime-extensions - (cons - (cons (if (= (string-to-char (car extns)) ?.) - (car extns) - (concat "." (car extns))) type) - mailcap-mime-extensions) - extns (cdr extns))))))) - -(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))) - -;; Unused? -(defalias 'mailcap-command-p 'executable-find) - -(defun mailcap-mime-types () - "Return a list of MIME media types." - (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) - -;;; mailcap.el ends here |