2 ;;; A MIME viewer for GNU Emacs
4 ;;; by Morioka Tomohiko, 1994/07/13
22 (defconst mime-viewer/RCS-ID
23 "$Id: tm-view.el,v 6.8 1995/03/12 15:58:32 morioka Exp $")
25 (defconst mime-viewer/version (get-version-string mime-viewer/RCS-ID))
26 (defconst mime/viewer-version mime-viewer/version)
32 (defconst mime/tspecials "\000-\040()<>@,;:\\\"/[\093?.=")
33 (defconst mime/token-regexp
34 (concat "[^" mime/tspecials "]*"))
35 (defconst mime/content-type-subtype-regexp
36 (concat mime/token-regexp "/" mime/token-regexp))
37 (defconst mime/content-parameter-value-regexp
39 message/quoted-string-regexp
42 (defconst mime/output-buffer-name "*MIME-out*")
43 (defconst mime/decoding-buffer-name "*MIME-decoding*")
49 (defvar mime/content-decoding-condition
50 ;;(setq mime/content-decoding-condition
51 '(((type . "text/plain")
52 (method "tm-plain" nil 'file 'type 'encoding 'mode 'name))
53 ;;((type . "text/x-latex")
54 ;; (method "tm-latex" nil 'file 'type 'encoding 'mode 'name))
55 ((type . "audio/basic")
56 (method "tm-au" nil 'file 'type 'encoding 'mode 'name))
58 (method "tm-image" nil 'file 'type 'encoding 'mode 'name))
59 ((type . "image/jpeg")
60 (method "tm-image" nil 'file 'type 'encoding 'mode 'name))
61 ((type . "image/tiff")
62 (method "tm-image" nil 'file 'type 'encoding 'mode 'name))
63 ((type . "image/x-tiff")
64 (method "tm-image" nil 'file 'type 'encoding 'mode 'name))
65 ((type . "image/x-xbm")
66 (method "tm-image" nil 'file 'type 'encoding 'mode 'name))
67 ((type . "image/x-pic")
68 (method "tm-image" nil 'file 'type 'encoding 'mode 'name))
69 ((type . "video/mpeg")
70 (method "tm-mpeg" nil 'file 'type 'encoding 'mode 'name))
71 ((type . "application/octet-stream")
72 (method "tm-file" nil 'file 'type 'encoding 'mode 'name))
73 ;;((type . "message/external-body")
74 ;; (method "xterm" nil
75 ;; "-e" "showexternal"
76 ;; 'file '"access-type" '"name" '"site" '"directory"))
77 ((type . "message/partial")
78 (method . mime/decode-message/partial-region))
80 "-m" "tm" "-x" "-d" "-z" "-e" 'file)(mode . "play"))
83 (defvar mime-viewer/content-filter-alist
84 '(("text/plain" . mime-viewer/filter-text/plain)))
86 (defvar mime-viewer/content-subject-function
88 (lambda (cnum subj ctype params)
90 (format "[%s %s (%s)]\n"
94 (format "%s" (+ num 1))
101 (defvar mime-viewer/content-header-filter-function
102 (function mime-viewer/default-content-header-filter-function))
104 (defun mime-viewer/default-content-header-filter-function (cnum)
106 (delete-region (goto-char (point-min))
107 (or (and (re-search-forward "^$" nil t)
113 (defvar mime-viewer/default-showing-Content-Type-list
114 '("text/plain" "text/richtext" "text/enriched"
115 "text/x-latex" "application/x-latex"
116 "application/octet-stream" nil))
118 (defvar mime-viewer/quitting-method-alist
121 (mime-viewer/kill-buffer)
122 (delete-other-windows)
123 (gnus-article-show-summary)
127 (mime-viewer/kill-buffer)
129 (delete-other-windows)
133 (let ((win (get-buffer-window
134 mime/output-buffer-name))
136 (mime::preview-content-info/buffer
137 (car mime::preview/content-list)))
142 (mime-viewer/kill-buffer)
144 (let ((name (buffer-name buf)))
145 (string-match "show-" name)
146 (substring name (match-end 0))
149 (mime/show-message-mode
151 (set-window-configuration
152 mime/show-mode-old-window-configuration)
153 (let ((mother mime/mother-buffer))
155 (mime::preview-content-info/buffer
156 (car mime::preview/content-list)))
157 (mime-viewer/kill-buffer)
158 (pop-to-buffer mother)
159 (goto-char (point-min))
160 (mime-viewer/up-content)
164 (defvar mime-viewer/decoding-mode "play" "MIME body decoding mode")
173 (defun mime::make-content-info (beg end ctype params encoding children)
174 (vector beg end ctype params encoding children)
177 (defun mime::content-info/point-min (cinfo)
181 (defun mime::content-info/point-max (cinfo)
185 (defun mime::content-info/type (cinfo)
189 (defun mime::content-info/parameters (cinfo)
193 (defun mime::content-info/encoding (cinfo)
197 (defun mime::content-info/children (cinfo)
201 ;;; @@ preview-content-info
204 (defun mime::make-preview-content-info (beg end buf cinfo)
205 (vector beg end buf cinfo)
208 (defun mime::preview-content-info/point-min (pcinfo)
212 (defun mime::preview-content-info/point-max (pcinfo)
216 (defun mime::preview-content-info/buffer (pcinfo)
220 (defun mime::preview-content-info/content-info (pcinfo)
225 ;;; @ buffer local variables
228 (defvar mime::article/content-info)
229 (defvar mime::article/preview-buffer)
231 (defvar mime::preview/content-list nil)
232 (defvar mime::preview/original-major-mode nil)
238 (defun mime-viewer/parse-message ()
239 (make-variable-buffer-local 'mime::article/content-info)
240 (setq mime::article/content-info (mime-viewer/parse))
241 (let ((ret (mime-viewer/make-preview-buffer)))
242 (make-variable-buffer-local 'mime::article/preview-buffer)
243 (setq mime::article/preview-buffer (car ret))
246 (defun mime-viewer/parse ()
250 (goto-char (point-min))
254 (goto-char (point-min))
255 (mime/Content-Transfer-Encoding)
258 (let ((ctype (car ctl))
262 (setq ctype (downcase ctype))
264 (if (stringp encoding)
265 (setq encoding (downcase encoding))
267 (let ((boundary (assoc "boundary" params)))
268 (search-forward "\n\n" nil t)
271 (message/strip-quoted-string (cdr boundary)))
272 (mime-viewer/parse-multipart
275 (search-forward (concat "--" boundary "--\n") nil t)
278 boundary ctype params encoding)
280 ((string= ctype "message/rfc822")
281 (mime::make-content-info
282 (point-min) (point-max)
283 ctype params encoding
286 (narrow-to-region (match-end 0) (point-max))
287 (list (mime-viewer/parse))
292 (mime::make-content-info (point-min) (point-max)
293 ctype params encoding nil)
297 (defun mime-viewer/parse-multipart (beg end boundary ctype params encoding)
298 (let ((sep (concat "^--" boundary "$"))
299 cb ce ct ret ncb children)
302 (narrow-to-region beg end)
303 (goto-char (point-min))
304 (search-forward (concat "--" boundary "\n") nil t)
305 (setq cb (match-end 0))
306 (while (re-search-forward sep nil t)
307 (setq ce (match-beginning 0))
308 (setq ncb (match-end 0))
311 (narrow-to-region cb ce)
312 (setq ret (mime-viewer/parse))
314 (setq children (nconc children (list ret)))
315 (goto-char (mime::content-info/point-max ret))
316 (search-forward (concat "--" boundary "\n") nil t)
317 (goto-char (setq cb (match-end 0)))
319 (setq ce (point-max))
322 (narrow-to-region cb ce)
323 (setq ret (mime-viewer/parse))
325 (setq children (nconc children (list ret)))
327 (setq beg (point-min))
329 (mime::make-content-info beg end ctype params encoding children)
332 (defun mime/Content-Type ()
335 (if (and (re-search-forward "^Content-Type:[ \t]*" nil t)
339 (and (re-search-forward ".*\\(\n[ \t].*\\)*" nil t)
342 (goto-char (point-min))
343 (re-search-forward mime/content-type-subtype-regexp nil t)
347 (buffer-substring (match-beginning 0) (match-end 0))
349 dest attribute value)
350 (while (and (re-search-forward "[ \t\n]*;[ \t\n]*" nil t)
351 (re-search-forward mime/token-regexp nil t)
355 (buffer-substring (match-beginning 0) (match-end 0))
357 (if (and (re-search-forward "=[ \t\n]*" nil t)
358 (re-search-forward mime/content-parameter-value-regexp
363 (message/strip-quoted-string
364 (buffer-substring (match-beginning 0)
372 (defun mime/Content-Transfer-Encoding (&optional default-encoding)
375 (if (and (re-search-forward "^Content-Transfer-Encoding:[ \t]*" nil t)
376 (re-search-forward mime/token-regexp nil t)
378 (downcase (buffer-substring (match-beginning 0) (match-end 0)))
382 (defun mime/get-subject (param)
386 (or (and (setq ret (assoc "name" param))
387 (message/strip-quoted-string (cdr ret))
389 (and (setq ret (assoc "x-name" param))
390 (message/strip-quoted-string (cdr ret))
393 (narrow-to-region (point-min)
394 (or (and (search-forward "\n\n" nil t)
399 (message/get-field-body "Content-Description")
400 (message/get-field-body "Subject")
405 (defun mime/get-name (param)
406 (replace-as-filename (mime/get-subject param))
409 (defun mime-viewer/make-preview-buffer (&optional buf cinfo obuf)
410 (let ((the-buf (current-buffer)) pcl dest)
418 (switch-to-buffer buf)
419 (setq cinfo mime::article/content-info)
422 (setq obuf (concat "*Preview-" (buffer-name buf) "*"))
424 (setq pcl (mime::make-flat-content-list cinfo))
425 (if (get-buffer obuf)
432 (let ((beg (mime::content-info/point-min cell))
433 (end (mime::content-info/point-max cell))
434 (ctype (mime::content-info/type cell))
435 (params (mime::content-info/parameters cell))
436 cnum e nb ne subj str)
437 (setq cnum (mime::get-point-content-number beg cinfo))
438 (switch-to-buffer buf)
443 mime-viewer/default-showing-Content-Type-list))
447 (search-forward "\n\n" nil t)
451 (if (> e (point-max))
454 (setq str (buffer-substring beg e))
455 (switch-to-buffer obuf)
462 (narrow-to-region nb ne)
463 (mime/decode-message-header)
464 (setq subj (mime/get-subject params))
468 mime-viewer/content-filter-alist))))
469 (if (and f (fboundp f))
470 (funcall f ctype params)
472 (funcall mime-viewer/content-header-filter-function
475 (funcall mime-viewer/content-subject-function
476 cnum subj ctype params)
477 (setq ne (point-max))
478 (mime::make-preview-content-info nb (- ne 1)
484 (set-buffer-modified-p nil)
485 (setq buffer-read-only t)
486 (switch-to-buffer the-buf)
491 ;;; @ content information
494 (defun mime::get-point-content-number (p &optional cinfo)
496 (setq cinfo mime::article/content-info)
498 (let ((b (mime::content-info/point-min cinfo))
499 (e (mime::content-info/point-max cinfo))
500 (c (mime::content-info/children cinfo))
502 (if (and (<= b p)(<= p e))
503 (or (let (co ret (sn 0))
507 (setq ret (mime::get-point-content-number p co))
508 (cond ((eq ret t) (throw 'tag (list sn)))
509 (ret (throw 'tag (cons sn ret)))
516 (defun mime::article/get-content-region (cn &optional cinfo)
518 (setq cinfo mime::article/content-info)
525 (let ((rc (nth sn (mime::content-info/children cinfo))))
527 (mime::article/get-content-region (cdr cn) rc)
531 (defun mime::make-flat-content-list (&optional cinfo)
533 (setq cinfo mime::article/content-info)
535 (let ((dest (list cinfo))
536 (rcl (mime::content-info/children cinfo))
539 (setq dest (nconc dest (mime::make-flat-content-list (car rcl))))
544 (defun mime::point-preview-content (p &optional pcl)
546 (setq pcl mime::preview/content-list)
552 (if (and (<= (mime::preview-content-info/point-min cell) p)
553 (<= p (mime::preview-content-info/point-max cell))
566 (defun mime/Quoted-Printable-decode-region (beg end)
570 (narrow-to-region beg end)
571 (goto-char (point-min))
572 (while (re-search-forward "=\n" nil t)
575 (goto-char (point-min))
577 (while (re-search-forward mime/Quoted-Printable-octet-regexp nil t)
578 (setq b (match-beginning 0))
579 (setq e (match-end 0))
580 (setq str (buffer-substring b e))
582 (insert (mime/Quoted-Printable-decode-string str))
586 (defun mime/Base64-decode-region (beg end)
590 (narrow-to-region beg end)
591 (goto-char (point-min))
592 (while (search-forward "\n" nil t)
595 (let ((str (buffer-substring (point-min)(point-max))))
596 (delete-region (point-min)(point-max))
597 (insert (mime/base64-decode-string str))
600 (defun mime/make-method-args (cal format)
605 (let ((ret (cdr (assoc (eval arg) cal))))
613 (defun mime/start-external-method-region (beg end cal)
615 (if (< end (point-max))
620 (narrow-to-region beg e)
622 (let ((method (cdr (assoc 'method cal)))
623 (name (mime/get-name cal))
626 (let ((file (make-temp-name
627 (expand-file-name "TM" mime/tmp-dir)))
631 (search-forward "\n\n" nil t)
632 (setq b (match-end 0))
635 (write-region b e file)
637 'name (replace-as-filename name) cal))
638 (setq cal (put-alist 'file file cal))
641 mime/output-buffer-name (car method)
643 (mime/make-method-args cal (cdr (cdr method)))
645 (apply (function start-process) args)
646 (mime/show-output-buffer)
650 (defun mime/decode-message/partial-region (beg end cal)
652 (let* ((root-dir (expand-file-name
653 (concat "m-prts-" (user-login-name)) mime/tmp-dir))
654 (id (cdr (assoc "id" cal)))
655 (number (cdr (assoc "number" cal)))
656 (total (cdr (assoc "total" cal)))
657 (the-buf (current-buffer))
659 (mother mime::article/preview-buffer))
660 (if (not (file-exists-p root-dir))
661 (shell-command (concat "mkdir " root-dir))
663 (setq id (replace-as-filename id))
664 (setq root-dir (concat root-dir "/" id))
665 (if (not (file-exists-p root-dir))
666 (shell-command (concat "mkdir " root-dir))
668 (setq file (concat root-dir "/FULL"))
669 (if (not (file-exists-p file))
671 (re-search-forward "^$")
672 (goto-char (+ (match-end 0) 1))
673 (setq file (concat root-dir "/" number))
674 (write-region (point) (point-max) file)
675 (if (get-buffer "*MIME-temp*")
676 (kill-buffer "*MIME-temp*")
678 (switch-to-buffer "*MIME-temp*")
680 (max (string-to-int total))
684 (setq file (concat root-dir "/" (int-to-string i)))
685 (if (not (file-exists-p file))
687 (switch-to-buffer the-buf)
690 (insert-file-contents file)
691 (goto-char (point-max))
694 (delete-other-windows)
695 (write-file (concat root-dir "/FULL"))
696 (setq major-mode 'mime/show-message-mode)
697 (mime/viewer-mode mother)
698 (pop-to-buffer (current-buffer))
702 (delete-other-windows)
704 (setq major-mode 'mime/show-message-mode)
705 (mime/viewer-mode mother)
706 (pop-to-buffer (current-buffer))
710 (defun mime/get-content-decoding-alist (al)
711 (get-unified-alist mime/content-decoding-condition al)
714 (defun mime::article/decode-content-region (cinfo)
716 (let ((beg (mime::content-info/point-min cinfo))
717 (end (mime::content-info/point-max cinfo))
718 (ctype (mime::content-info/type cinfo))
719 (params (mime::content-info/parameters cinfo))
720 (encoding (mime::content-info/encoding cinfo))
723 (let (method cal ret)
724 (setq cal (append (list (cons 'type ctype)
725 (cons 'encoding encoding)
726 (cons 'major-mode major-mode)
729 (if mime-viewer/decoding-mode
731 (cons 'mode mime-viewer/decoding-mode)
734 (setq ret (mime/get-content-decoding-alist cal))
735 (setq method (cdr (assoc 'method ret)))
736 (cond ((and (symbolp method)
738 (funcall method beg end ret)
740 ((and (listp method)(stringp (car method)))
741 (mime/start-external-method-region beg end ret)
743 (t (mime/show-output-buffer
744 "No method are specified for %s\n" ctype)
749 (defun mime/show-output-buffer (&rest forms)
750 (let ((the-buf (current-buffer)))
751 (if (null (get-buffer-window mime/output-buffer-name))
752 (split-window-vertically (/ (* (window-height) 3) 4))
754 (pop-to-buffer mime/output-buffer-name)
755 (goto-char (point-max))
757 (insert (apply (function format) forms))
759 (pop-to-buffer the-buf)
766 (defun mime-viewer/filter-text/plain (ctype params)
769 (let ((charset (cdr (assoc "charset" params)))
773 (goto-char (point-min))
774 (narrow-to-region (point-min)
775 (or (and (search-forward "\n\n" nil t)
778 (goto-char (point-min))
779 (mime/Content-Transfer-Encoding "7bit")
781 (beg (point-min)) (end (point-max))
783 (goto-char (point-min))
784 (if (search-forward "\n\n" nil t)
785 (setq beg (match-end 0))
787 (if (cond ((string= encoding "quoted-printable")
788 (mime/Quoted-Printable-decode-region beg end)
790 ((string= encoding "base64")
791 (mime/Base64-decode-region beg end)
793 (mime/code-convert-region-to-emacs beg (point-max) charset)
798 ;;; @ MIME viewer mode
801 (defvar mime/viewer-mode-map nil)
802 (if (null mime/viewer-mode-map)
804 (setq mime/viewer-mode-map (make-keymap))
805 (suppress-keymap mime/viewer-mode-map)
806 (define-key mime/viewer-mode-map
807 "u" (function mime-viewer/up-content))
808 (define-key mime/viewer-mode-map
809 "p" (function mime-viewer/previous-content))
810 (define-key mime/viewer-mode-map
811 "n" (function mime-viewer/next-content))
812 (define-key mime/viewer-mode-map
813 " " (function mime-viewer/scroll-up-content))
814 (define-key mime/viewer-mode-map
815 "\M- " (function mime-viewer/scroll-down-content))
816 (define-key mime/viewer-mode-map
817 "\177" (function mime-viewer/scroll-down-content))
818 (define-key mime/viewer-mode-map
819 "\C-m" (function mime-viewer/next-line-content))
820 (define-key mime/viewer-mode-map
821 "\C-\M-m" (function mime-viewer/previous-line-content))
822 (define-key mime/viewer-mode-map
823 "v" (function mime-viewer/play-content))
824 (define-key mime/viewer-mode-map
825 "e" (function mime-viewer/extract-content))
826 (define-key mime/viewer-mode-map
827 "\C-c\C-p" (function mime-viewer/print-content))
828 (define-key mime/viewer-mode-map
829 "q" (function mime-viewer/quit))
830 (define-key mime/viewer-mode-map
831 "\C-c\C-x" (function mime-viewer/kill-buffer))
834 (defun mime/viewer-mode (&optional mother)
835 "Major mode for viewing MIME message.
837 u Move to upper content
838 p Move to previous content
839 n Move to next content
843 RET Move to next line
844 M-RET Move to previous line
845 v Decode the content as `play mode'
846 e Decode the content as `extract mode'
847 C-c C-p Decode the content as `print mode'
851 (let ((buf (get-buffer mime/output-buffer-name))
852 (the-buf (current-buffer))
856 (switch-to-buffer buf)
858 (switch-to-buffer the-buf)
860 (let ((ret (mime-viewer/parse-message))
862 (switch-to-buffer (car ret))
863 (setq major-mode 'mime/viewer-mode)
864 (setq mode-name "MIME-View")
865 (make-variable-buffer-local 'mime::preview/original-major-mode)
866 (setq mime::preview/original-major-mode
869 (make-variable-buffer-local
870 'mime/show-mode-old-window-configuration)
871 (setq mime/show-mode-old-window-configuration
872 (current-window-configuration))
873 (make-variable-buffer-local 'mime/mother-buffer)
874 (setq mime/mother-buffer mother)
875 'mime/show-message-mode)
877 (use-local-map mime/viewer-mode-map)
878 (make-variable-buffer-local 'mime::preview/content-list)
879 (setq mime::preview/content-list (nth 1 ret))
881 (let ((ce (mime::preview-content-info/point-max
882 (car mime::preview/content-list)
885 (goto-char (point-min))
886 (search-forward "\n\n" nil t)
887 (setq e (match-end 0))
891 (run-hooks 'mime/viewer-mode-hook)
894 (defun mime::preview/decode-content ()
896 (let ((pc (mime::point-preview-content (point))))
898 (let ((the-buf (current-buffer)))
899 (switch-to-buffer (mime::preview-content-info/buffer pc))
900 (mime::article/decode-content-region
901 (mime::preview-content-info/content-info pc))
902 (if (eq (current-buffer)
903 (mime::preview-content-info/buffer pc))
904 (switch-to-buffer the-buf)
908 (defun mime-viewer/play-content ()
910 (let ((mime-viewer/decoding-mode "play"))
911 (mime::preview/decode-content)
914 (defun mime-viewer/extract-content ()
916 (let ((mime-viewer/decoding-mode "extract"))
917 (mime::preview/decode-content)
920 (defun mime-viewer/print-content ()
922 (let ((mime-viewer/decoding-mode "print"))
923 (mime::preview/decode-content)
926 (defun mime-viewer/up-content ()
928 (let ((pc (mime::point-preview-content (point))) cinfo
929 (the-buf (current-buffer))
931 (switch-to-buffer (mime::preview-content-info/buffer pc))
932 (setq cinfo (mime::preview-content-info/content-info pc))
933 (setq cn (mime::get-point-content-number
934 (mime::content-info/point-min cinfo)))
936 (mime-viewer/quit the-buf
937 (mime::preview-content-info/buffer pc)
939 (setq r (mime::article/get-content-region (butlast cn)))
940 (switch-to-buffer the-buf)
942 (let ((rpcl mime::preview/content-list) cell)
944 (setq cell (car rpcl))
945 (if (eq r (mime::preview-content-info/content-info cell))
947 (goto-char (mime::preview-content-info/point-min cell))
950 (setq rpcl (cdr rpcl))
954 (defun mime-viewer/previous-content ()
956 (let* ((pcl mime::preview/content-list)
958 (i (- (length pcl) 1))
962 (setq beg (mime::preview-content-info/point-min (nth i pcl)))
964 (throw 'tag (goto-char beg))
970 (defun mime-viewer/next-content ()
972 (let ((pcl mime::preview/content-list)
977 (setq beg (mime::preview-content-info/point-min (car pcl)))
979 (throw 'tag (goto-char beg))
985 (defun mime-viewer/scroll-up-content (&optional h)
988 (setq h (- (window-height) 1))
990 (let ((pcl mime::preview/content-list)
996 (setq beg (mime::preview-content-info/point-min (car pcl)))
1000 (setq pcl (cdr pcl))
1008 (defun mime-viewer/scroll-down-content (&optional h)
1011 (setq h (- (window-height) 1))
1013 (let ((pcl mime::preview/content-list)
1017 (or (let ((i (- (length pcl) 1)))
1020 (setq beg (mime::preview-content-info/point-min
1028 (forward-line (- h))
1033 (defun mime-viewer/next-line-content ()
1035 (mime-viewer/scroll-up-content 1)
1038 (defun mime-viewer/previous-line-content ()
1040 (mime-viewer/scroll-down-content 1)
1043 (defun mime-viewer/quit (&optional the-buf buf)
1046 (setq the-buf (current-buffer))
1049 (setq buf (mime::preview-content-info/buffer
1050 (mime::point-preview-content (point))))
1053 (switch-to-buffer buf)
1054 (assoc major-mode mime-viewer/quitting-method-alist)
1058 (switch-to-buffer the-buf)
1063 (defun mime-viewer/kill-buffer ()
1065 (kill-buffer (current-buffer))
1068 (fset 'mime/view-mode 'mime/viewer-mode)
1070 (run-hooks 'tm-view-load-hook)