;;; tm-view.el --- interactive MIME viewer for GNU Emacs

;; Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.

;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Created: 1994/7/13 (1994/8/31 obsolete tm-body.el)
;; Version: $Revision: 1.3 $
;; Keywords: mail, news, MIME, multimedia

;; This file is part of tm (Tools for MIME).

;; This program 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 2, or (at
;; your option) any later version.

;; This program 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; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Code:

(require 'tl-str)
(require 'tl-list)
(require 'tl-atype)
(require 'tl-misc)
(require 'std11)
(require 'mel)
(require 'tm-ew-d)
(require 'tm-def)
(require 'tm-parse)
(require 'tm-text)


;;; @ version
;;;

(defconst mime-viewer/RCS-ID
  "$Id: tm-view.el,v 1.3 1997/03/08 23:26:58 steve Exp $")

(defconst mime-viewer/version (get-version-string mime-viewer/RCS-ID))
(defconst mime/viewer-version mime-viewer/version)


;;; @ variables
;;;

(defvar mime/content-decoding-condition
  '(((type . "text/plain")
     (method "tm-plain" nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    ((type . "text/html")
     (method "tm-html" nil 'file 'type 'encoding 'mode 'name)
     (mode . "play")
     )
    ((type . "text/x-rot13-47")
     (method . mime-article/decode-caesar)
     (mode . "play")
     )
    ((type . "audio/basic")
     (method "tm-au"    nil 'file 'type 'encoding 'mode 'name)
     (mode . "play")
     )
    
    ((type . "image/jpeg")
     (method "tm-image" nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    ((type . "image/gif")
     (method "tm-image" nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    ((type . "image/tiff")
     (method "tm-image" nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    ((type . "image/x-tiff")
     (method "tm-image" nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    ((type . "image/x-xbm")
     (method "tm-image" nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    ((type . "image/x-pic")
     (method "tm-image" nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    ((type . "image/x-mag")
     (method "tm-image" nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    
    ((type . "video/mpeg")
     (method "tm-mpeg"  nil 'file 'type 'encoding 'mode 'name)
     (mode . "play")
     )
    
    ((type . "application/postscript")
     (method "tm-ps" nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    ((type . "application/octet-stream")
     (method "tm-file"  nil 'file 'type 'encoding 'mode 'name)
     (mode "play" "print")
     )
    
    ;;((type . "message/external-body")
    ;; (method "xterm" nil
    ;;	       "-e" "showexternal"
    ;;         'file '"access-type" '"name" '"site" '"directory"))
    ((type . "message/rfc822")
     (method . mime-article/view-message/rfc822)
     (mode . "play")
     )
    ((type . "message/partial")
     (method . mime-article/decode-message/partial)
     (mode . "play")
     )
    
    ((method "metamail" t "-m" "tm" "-x" "-d" "-z" "-e" 'file)
     (mode . "play")
     )
    ((method "tm-file"  nil 'file 'type 'encoding 'mode 'name)
     (mode . "extract")
     )
    ))

(defvar mime-viewer/childrens-header-showing-Content-Type-list
  '("message/rfc822" "message/news"))

(defvar mime-viewer/default-showing-Content-Type-list
  '("text/plain" nil "text/richtext" "text/enriched"
    "text/x-latex" "application/x-latex"
    "message/delivery-status"
    "application/pgp" "text/x-pgp"
    "application/octet-stream"
    "application/x-selection" "application/x-comment"))

(defvar mime-viewer/content-button-ignored-ctype-list
  '("application/x-selection"))

(defvar mime-viewer/content-button-visible-ctype-list
  '("application/pgp"))

(defvar mime-viewer/uuencode-encoding-name-list '("x-uue" "x-uuencode"))

(defvar mime-viewer/ignored-field-list
  '(".*Received" ".*Path" ".*Id" "References"
    "Replied" "Errors-To"
    "Lines" "Sender" ".*Host" "Xref"
    "Content-Type" "Precedence"
    "Status" "X-VM-.*")
  "All fields that match this list will be hidden in MIME preview buffer.
Each elements are regexp of field-name. [tm-view.el]")

(defvar mime-viewer/ignored-field-regexp
  (concat "^"
	  (apply (function regexp-or) mime-viewer/ignored-field-list)
	  ":"))

(defvar mime-viewer/visible-field-list
  '("Dnas.*" "Message-Id")
  "All fields that match this list will be displayed in MIME preview buffer.
Each elements are regexp of field-name. [tm-view.el]")

(defvar mime-viewer/visible-field-regexp
  (concat "^"
	  (apply (function regexp-or) mime-viewer/visible-field-list)
	  ":"))

(defvar mime-viewer/redisplay nil)

(defvar mime-viewer/announcement-for-message/partial
  (if (and (>= emacs-major-version 19) window-system)
      "\
\[[ This is message/partial style split message. ]]
\[[ Please press `v' key in this buffer          ]]
\[[ or click here by mouse button-2.             ]]"
    "\
\[[ This is message/partial style split message. ]]
\[[ Please press `v' key in this buffer.         ]]"
    ))


;;; @@ predicate functions
;;;

(defun mime-viewer/header-visible-p (rcnum cinfo &optional ctype)
  (or (null rcnum)
      (progn
	(setq ctype
	      (mime::content-info/type
	       (mime-article/rcnum-to-cinfo (cdr rcnum) cinfo)
	       ))
	(member ctype mime-viewer/childrens-header-showing-Content-Type-list)
	)))

(defun mime-viewer/body-visible-p (rcnum cinfo &optional ctype)
  (let (ccinfo)
    (or ctype
	(setq ctype
	      (mime::content-info/type
	       (setq ccinfo (mime-article/rcnum-to-cinfo rcnum cinfo))
	       ))
	)
    (and (member ctype mime-viewer/default-showing-Content-Type-list)
	 (if (string-equal ctype "application/octet-stream")
	     (progn
	       (or ccinfo
		   (setq ccinfo (mime-article/rcnum-to-cinfo rcnum cinfo))
		   )
	       (member (mime::content-info/encoding ccinfo)
		       '(nil "7bit" "8bit"))
	       )
	   t))
    ))


;;; @@ content button
;;;

(defun mime-preview/insert-content-button
  (rcnum cinfo ctype params subj encoding)
  (save-restriction
    (narrow-to-region (point)(point))
    (let ((access-type (assoc "access-type" params))
	  (charset (assoc "charset" params))
	  (num (or (assoc-value "x-part-number" params)
		   (if (consp rcnum)
		       (mapconcat (function
				   (lambda (num)
				     (format "%s" (1+ num))
				     ))
				  (reverse rcnum) ".")
		     "0"))
	       ))
      (cond (access-type
	     (let ((server (assoc "server" params)))
	       (setq access-type (cdr access-type))
	       (if server
		   (insert (format "[%s %s ([%s] %s)]\n" num subj
				   access-type (cdr server)))
		 (let ((site (assoc-value "site" params))
		       (dir (assoc-value "directory" params))
		       )
		   (insert (format "[%s %s ([%s] %s:%s)]\n" num subj
				   access-type site dir))
		   )))
	     )
	    (t
	     (insert (concat "[" num " " subj))
	     (let ((rest
		    (if (setq charset (cdr charset))
			(if encoding
			    (format " <%s; %s (%s)>]\n"
				    ctype charset encoding)
			  (format " <%s; %s>]\n" ctype charset)
			  )
		      (format " <%s>]\n" ctype)
		      )))
	       (if (>= (+ (current-column)(length rest))(window-width))
		   (setq rest (concat "\n\t" rest))
		 )
	       (insert rest)
	       ))))
    (tm:add-button (point-min)(1- (point-max))
		   (function mime-viewer/play-content))
    ))

(defun mime-preview/default-content-button-function
  (rcnum cinfo ctype params subj encoding)
  (if (and (consp rcnum)
	   (not (member
		 ctype
		 mime-viewer/content-button-ignored-ctype-list)))
      (mime-preview/insert-content-button
       rcnum cinfo ctype params subj encoding)
    ))

(defvar mime-preview/content-button-function
  (function mime-preview/default-content-button-function))


;;; @@ content header filter
;;;

(defun mime-preview/cut-header ()
  (goto-char (point-min))
  (while (and
	  (re-search-forward mime-viewer/ignored-field-regexp nil t)
	  (let* ((beg (match-beginning 0))
		 (end (match-end 0))
		 (name (buffer-substring beg end))
		 )
	    (if (not (string-match mime-viewer/visible-field-regexp name))
		(delete-region
		 beg
		 (save-excursion
		   (and
		    (re-search-forward "^\\([^ \t]\\|$\\)" nil t)
		    (match-beginning 0)
		    )))
	      )
	    t)))
  )

(defun mime-viewer/default-content-header-filter ()
  (mime-preview/cut-header)
  (mime/decode-message-header)
  )

(defvar mime-viewer/content-header-filter-alist nil)


;;; @@ content filter
;;;

(defvar mime-viewer/content-filter-alist
  '(("text/enriched" . mime-preview/filter-for-text/enriched)
    ("text/richtext" . mime-preview/filter-for-text/richtext)
    (t . mime-preview/filter-for-text/plain)
    ))


;;; @@ content separator
;;;

(defun mime-preview/default-content-separator (rcnum cinfo ctype params subj)
  (if (and (not (mime-viewer/header-visible-p rcnum cinfo ctype))
	   (not (mime-viewer/body-visible-p rcnum cinfo ctype))
	   )
      (progn
	(goto-char (point-max))
	(insert "\n")
	)))


;;; @@ buffer local variables
;;;

;; for XEmacs
(defvar mime::article/preview-buffer nil)
(defvar mime::article/code-converter nil)
(defvar mime::preview/article-buffer nil)

(make-variable-buffer-local 'mime::article/content-info)
(make-variable-buffer-local 'mime::article/preview-buffer)
(make-variable-buffer-local 'mime::article/code-converter)

(make-variable-buffer-local 'mime::preview/mother-buffer)
(make-variable-buffer-local 'mime::preview/content-list)
(make-variable-buffer-local 'mime::preview/article-buffer)
(make-variable-buffer-local 'mime::preview/original-major-mode)
(make-variable-buffer-local 'mime::preview/original-window-configuration)


;;; @@ quitting method
;;;

(defvar mime-viewer/quitting-method-alist
  '((mime/show-message-mode
     . mime-viewer/quitting-method-for-mime/show-message-mode)))

(defvar mime-viewer/over-to-previous-method-alist nil)
(defvar mime-viewer/over-to-next-method-alist nil)

(defvar mime-viewer/show-summary-method nil)


;;; @@ following method
;;;

(defvar mime-viewer/following-method-alist nil)

(defvar mime-viewer/following-required-fields-list
  '("From"))


;;; @@ X-Face
;;;

;; hack from Gnus 5.0.4.

(defvar mime-viewer/x-face-to-pbm-command
  "{ echo '/* Width=48, Height=48 */'; uncompface; } | icontopbm")

(defvar mime-viewer/x-face-command
  (concat mime-viewer/x-face-to-pbm-command
	  " | xv -quit -")
  "String to be executed to display an X-Face field.
The command will be executed in a sub-shell asynchronously.
The compressed face will be piped to this command.")

(defun mime-viewer/x-face-function ()
  "Function to display X-Face field. You can redefine to customize."
  ;; 1995/10/12 (c.f. tm-eng:130)
  ;;	fixed by Eric Ding <ericding@San-Jose.ate.slb.com>
  (save-restriction
    (narrow-to-region (point-min) (re-search-forward "^$" nil t))
    ;; end
    (goto-char (point-min))
    (if (re-search-forward "^X-Face:[ \t]*" nil t)
	(let ((beg (match-end 0))
	      (end (std11-field-end))
	      )
	  (call-process-region beg end "sh" nil 0 nil
			       "-c" mime-viewer/x-face-command)
	  ))))


;;; @@ utility
;;;

(defun mime-preview/get-original-major-mode ()
  (if mime::preview/mother-buffer
      (save-excursion
	(set-buffer mime::preview/mother-buffer)
	(mime-preview/get-original-major-mode)
	)
    mime::preview/original-major-mode))


;;; @ data structures
;;;

;;; @@ preview-content-info
;;;

(define-structure mime::preview-content-info
  point-min point-max buffer content-info)


;;; @ buffer setup
;;;

(defun mime-viewer/setup-buffer (&optional ctl encoding ibuf obuf)
  (if ibuf
      (progn
	(get-buffer ibuf)
	(set-buffer ibuf)
	))
  (or mime-viewer/redisplay
      (setq mime::article/content-info (mime/parse-message ctl encoding))
      )
  (let ((ret (mime-viewer/make-preview-buffer obuf)))
    (setq mime::article/preview-buffer (car ret))
    ret))

(defun mime-viewer/make-preview-buffer (&optional obuf)
  (let* ((cinfo mime::article/content-info)
	 (pcl (mime/flatten-content-info cinfo))
	 (dest (make-list (length pcl) nil))
	 (the-buf (current-buffer))
	 (mode major-mode)
	 )
    (or obuf
	(setq obuf (concat "*Preview-" (buffer-name the-buf) "*")))
    (set-buffer (get-buffer-create obuf))
    (setq buffer-read-only nil)
    (widen)
    (erase-buffer)
    (setq mime::preview/article-buffer the-buf)
    (setq mime::preview/original-major-mode mode)
    (setq major-mode 'mime/viewer-mode)
    (setq mode-name "MIME-View")
    (let ((drest dest))
      (while pcl
	(setcar drest
		(mime-preview/display-content (car pcl) cinfo the-buf obuf))
	(setq pcl (cdr pcl)
	      drest (cdr drest))
	))
    (set-buffer-modified-p nil)
    (setq buffer-read-only t)
    (set-buffer the-buf)
    (list obuf dest)
    ))

(defun mime-preview/display-content (content cinfo ibuf obuf)
  (let* ((beg (mime::content-info/point-min content))
	 (end (mime::content-info/point-max content))
	 (ctype (mime::content-info/type content))
	 (params (mime::content-info/parameters content))
	 (encoding (mime::content-info/encoding content))
	 (rcnum (mime::content-info/rcnum content))
	 he e nb ne subj)
    (set-buffer ibuf)
    (goto-char beg)
    (setq he (if (re-search-forward "^$" nil t)
		 (1+ (match-end 0))
	       end))
    (if (> he end)
	(setq he end)
      )
    (save-restriction
      (narrow-to-region beg end)
      (setq subj
	    (mime-eword/decode-string
	     (mime-article/get-subject params encoding)))
      )
    (set-buffer obuf)
    (setq nb (point))
    (narrow-to-region nb nb)
    (funcall mime-preview/content-button-function
	     rcnum cinfo ctype params subj encoding)
    (if (mime-viewer/header-visible-p rcnum cinfo ctype)
	(mime-preview/display-header beg he)
      )
    (if (and (null rcnum)
	     (member
	      ctype mime-viewer/content-button-visible-ctype-list))
	(save-excursion
	  (goto-char (point-max))
	  (mime-preview/insert-content-button
	   rcnum cinfo ctype params subj encoding)
	  ))
    (cond ((mime-viewer/body-visible-p rcnum cinfo ctype)
	   (mime-preview/display-body he end
				      rcnum cinfo ctype params subj encoding)
	   )
	  ((equal ctype "message/partial")
	   (mime-preview/display-message/partial)
	   )
	  ((and (null rcnum)
		(null (mime::content-info/children cinfo))
		)
	   (goto-char (point-max))
	   (mime-preview/insert-content-button
	    rcnum cinfo ctype params subj encoding)
	   ))
    (mime-preview/default-content-separator rcnum cinfo ctype params subj)
    (prog1
	(progn
	  (setq ne (point-max))
	  (widen)
	  (mime::preview-content-info/create nb (1- ne) ibuf content)
	  )
      (goto-char ne)
      )))

(defun mime-preview/display-header (beg end)
  (save-restriction
    (narrow-to-region (point)(point))
    (insert-buffer-substring mime::preview/article-buffer beg end)
    (let ((f (cdr (assq mime::preview/original-major-mode
			mime-viewer/content-header-filter-alist))))
      (if (functionp f)
	  (funcall f)
	(mime-viewer/default-content-header-filter)
	))
    (run-hooks 'mime-viewer/content-header-filter-hook)
    ))

(defun mime-preview/display-body (beg end
				      rcnum cinfo ctype params subj encoding)
  (save-restriction
    (narrow-to-region (point-max)(point-max))
    (insert-buffer-substring mime::preview/article-buffer beg end)
    (let ((f (cdr (or (assoc ctype mime-viewer/content-filter-alist)
		      (assq t mime-viewer/content-filter-alist)))))
      (and (functionp f)
	   (funcall f ctype params encoding)
	   )
      )))

(defun mime-preview/display-message/partial ()
  (save-restriction
    (goto-char (point-max))
    (if (not (search-backward "\n\n" nil t))
	(insert "\n")
      )
    (let ((be (point-max)))
      (narrow-to-region be be)
      (insert mime-viewer/announcement-for-message/partial)
      (tm:add-button (point-min)(point-max)
		     (function mime-viewer/play-content))
      )))

(defun mime-article/get-uu-filename (param &optional encoding)
  (if (member (or encoding
		  (cdr (assq 'encoding param))
		  )
	      mime-viewer/uuencode-encoding-name-list)
      (save-excursion
	(or (if (re-search-forward "^begin [0-9]+ " nil t)
		(if (looking-at ".+$")
		    (buffer-substring (match-beginning 0)(match-end 0))
		  ))
	    ""))
    ))

(defun mime-article/get-subject (param &optional encoding)
  (or (std11-find-field-body '("Content-Description" "Subject"))
      (let (ret)
	(if (or (and (setq ret (mime/Content-Disposition))
		     (setq ret (assoc "filename" (cdr ret)))
		     )
		(setq ret (assoc "name" param))
		(setq ret (assoc "x-name" param))
		)
	    (std11-strip-quoted-string (cdr ret))
	  ))
      (mime-article/get-uu-filename param encoding)
      ""))


;;; @ content information
;;;

(defun mime-article/point-content-number (p &optional cinfo)
  (or cinfo
      (setq cinfo mime::article/content-info)
      )
  (let ((b (mime::content-info/point-min cinfo))
	(e (mime::content-info/point-max cinfo))
	(c (mime::content-info/children cinfo))
	)
    (if (and (<= b p)(<= p e))
	(or (let (co ret (sn 0))
	      (catch 'tag
		(while c
		  (setq co (car c))
		  (setq ret (mime-article/point-content-number p co))
		  (cond ((eq ret t) (throw 'tag (list sn)))
			(ret (throw 'tag (cons sn ret)))
			)
		  (setq c (cdr c))
		  (setq sn (1+ sn))
		  )))
	    t))))

(defun mime-article/rcnum-to-cinfo (rcnum &optional cinfo)
  (or cinfo
      (setq cinfo mime::article/content-info)
      )
  (find-if (function
	    (lambda (ci)
	      (equal (mime::content-info/rcnum ci) rcnum)
	      ))
	   (mime/flatten-content-info cinfo)
	   ))

(defun mime-article/cnum-to-cinfo (cn &optional cinfo)
  (or cinfo
      (setq cinfo mime::article/content-info)
      )
  (if (eq cn t)
      cinfo
    (let ((sn (car cn)))
      (if (null sn)
	  cinfo
	(let ((rc (nth sn (mime::content-info/children cinfo))))
	  (if rc
	      (mime-article/cnum-to-cinfo (cdr cn) rc)
	    ))
	))))

(defun mime/flatten-content-info (&optional cinfo)
  (or cinfo
      (setq cinfo mime::article/content-info)
      )
  (let ((dest (list cinfo))
	(rcl (mime::content-info/children cinfo))
	)
    (while rcl
      (setq dest (nconc dest (mime/flatten-content-info (car rcl))))
      (setq rcl (cdr rcl))
      )
    dest))

(defun mime-preview/point-pcinfo (p &optional pcl)
  (or pcl
      (setq pcl mime::preview/content-list)
      )
  (catch 'tag
    (let ((r pcl) cell)
      (while r
	(setq cell (car r))
	(if (and (<= (mime::preview-content-info/point-min cell) p)
		 (<= p (mime::preview-content-info/point-max cell))
		 )
	    (throw 'tag cell)
	  )
	(setq r (cdr r))
	))
    (car (last pcl))
    ))


;;; @ MIME viewer mode
;;;

(defconst mime-viewer/menu-title "MIME-View")
(defconst mime-viewer/menu-list
  '((up		 "Move to upper content"      mime-viewer/up-content)
    (previous	 "Move to previous content"   mime-viewer/previous-content)
    (next	 "Move to next content"	      mime-viewer/next-content)
    (scroll-down "Scroll to previous content" mime-viewer/scroll-down-content)
    (scroll-up	 "Scroll to next content"     mime-viewer/scroll-up-content)
    (play	 "Play Content"               mime-viewer/play-content)
    (extract	 "Extract Content"            mime-viewer/extract-content)
    (print	 "Print"                      mime-viewer/print-content)
    (x-face	 "Show X Face"                mime-viewer/display-x-face)
    )
  "Menu for MIME Viewer")

(if running-xemacs
    (progn
      (defvar mime-viewer/xemacs-popup-menu
	(cons mime-viewer/menu-title
	      (mapcar (function
		       (lambda (item)
			 (vector (nth 1 item)(nth 2 item) t)
			 ))
		      mime-viewer/menu-list)))
      (defun mime-viewer/xemacs-popup-menu (event)
	"Popup the menu in the MIME Viewer buffer"
	(interactive "e")
	(select-window (event-window event))
	(set-buffer (event-buffer event))
	(popup-menu 'mime-viewer/xemacs-popup-menu))
      ))

(defun mime-viewer/define-keymap (&optional mother)
  (let ((mime/viewer-mode-map (if mother
				  (copy-keymap mother)
				(make-keymap)
				)))
    (or mother
	(suppress-keymap mime/viewer-mode-map))
    (define-key mime/viewer-mode-map
      "u"        (function mime-viewer/up-content))
    (define-key mime/viewer-mode-map
      "p"        (function mime-viewer/previous-content))
    (define-key mime/viewer-mode-map
      "n"        (function mime-viewer/next-content))
    (define-key mime/viewer-mode-map
      "\e\t"     (function mime-viewer/previous-content))
    (define-key mime/viewer-mode-map
      "\t"       (function mime-viewer/next-content))
    (define-key mime/viewer-mode-map
      " "        (function mime-viewer/scroll-up-content))
    (define-key mime/viewer-mode-map
      "\M- "     (function mime-viewer/scroll-down-content))
    (define-key mime/viewer-mode-map
      "\177"     (function mime-viewer/scroll-down-content))
    (define-key mime/viewer-mode-map
      "\C-m"     (function mime-viewer/next-line-content))
    (define-key mime/viewer-mode-map
      "\C-\M-m"  (function mime-viewer/previous-line-content))
    (define-key mime/viewer-mode-map
      "v"        (function mime-viewer/play-content))
    (define-key mime/viewer-mode-map
      "e"        (function mime-viewer/extract-content))
    (define-key mime/viewer-mode-map
      "\C-c\C-p" (function mime-viewer/print-content))
    (define-key mime/viewer-mode-map
      "x"        (function mime-viewer/display-x-face))
    (define-key mime/viewer-mode-map
      "a"        (function mime-viewer/follow-content))
    (define-key mime/viewer-mode-map
      "q"        (function mime-viewer/quit))
    (define-key mime/viewer-mode-map
      "h"        (function mime-viewer/show-summary))
    (define-key mime/viewer-mode-map
      "\C-c\C-x" (function mime-viewer/kill-buffer))
    (define-key mime/viewer-mode-map
      "<"        (function beginning-of-buffer))
    (define-key mime/viewer-mode-map
      ">"        (function end-of-buffer))
    (define-key mime/viewer-mode-map
      "?"        (function describe-mode))
    (if mouse-button-2
	(define-key mime/viewer-mode-map
	  mouse-button-2 (function tm:button-dispatcher))
      )
    (cond (running-xemacs
	   (define-key mime/viewer-mode-map
	     mouse-button-3 (function mime-viewer/xemacs-popup-menu))
	   )
	  ((>= emacs-major-version 19)
	   (define-key mime/viewer-mode-map [menu-bar mime-view]
	     (cons mime-viewer/menu-title
		   (make-sparse-keymap mime-viewer/menu-title)))
	   (mapcar (function
		    (lambda (item)
		      (define-key mime/viewer-mode-map
			(vector 'menu-bar 'mime-view (car item))
			(cons (nth 1 item)(nth 2 item))
			)
		      ))
		   (reverse mime-viewer/menu-list)
		   )
	   ))
    (use-local-map mime/viewer-mode-map)
    (run-hooks 'mime-viewer/define-keymap-hook)
    ))

(defun mime/viewer-mode (&optional mother ctl encoding ibuf obuf
				   mother-keymap)
  "Major mode for viewing MIME message.

Here is a list of the standard keys for mime/viewer-mode.

key		feature
---		-------

u		Move to upper content
p or M-TAB	Move to previous content
n or TAB	Move to next content
SPC		Scroll up or move to next content
M-SPC or DEL	Scroll down or move to previous content
RET		Move to next line
M-RET		Move to previous line
v		Decode current content as `play mode'
e		Decode current content as `extract mode'
C-c C-p		Decode current content as `print mode'
a		Followup to current content.
x		Display X-Face
q		Quit
button-2	Move to point under the mouse cursor
        	and decode current content as `play mode'
"
  (interactive)
  (let ((buf (get-buffer mime/output-buffer-name)))
    (if buf
	(save-excursion
	  (set-buffer buf)
	  (erase-buffer)
	  )))
  (let ((ret (mime-viewer/setup-buffer ctl encoding ibuf obuf))
	(win-conf (current-window-configuration))
	)
    (prog1
	(switch-to-buffer (car ret))
      (setq mime::preview/original-window-configuration win-conf)
      (if mother
	  (progn
	    (setq mime::preview/mother-buffer mother)
	    ))
      (mime-viewer/define-keymap mother-keymap)
      (setq mime::preview/content-list (nth 1 ret))
      (goto-char
       (let ((ce (mime::preview-content-info/point-max
		  (car mime::preview/content-list)
		  ))
	     e)
	 (goto-char (point-min))
	 (search-forward "\n\n" nil t)
	 (setq e (match-end 0))
	 (if (<= e ce)
	     e
	   ce)))
      (run-hooks 'mime/viewer-mode-hook)
      )))

(defun mime-preview/point-content-number (point)
  (save-window-excursion
    (let ((pc (mime-preview/point-pcinfo (point)))
	  cinfo)
      (switch-to-buffer (mime::preview-content-info/buffer pc))
      (setq cinfo (mime::preview-content-info/content-info pc))
      (mime-article/point-content-number (mime::content-info/point-min cinfo))
      )))

(defun mime-preview/cinfo-to-pcinfo (cinfo)
  (let ((rpcl mime::preview/content-list) cell)
    (catch 'tag
      (while rpcl
	(setq cell (car rpcl))
	(if (eq cinfo (mime::preview-content-info/content-info cell))
	    (throw 'tag cell)
	  )
	(setq rpcl (cdr rpcl))
	))))

(autoload 'mime-preview/decode-content "tm-play")

(defvar mime-viewer/decoding-mode "play" "MIME body decoding mode")

(defun mime-viewer/play-content ()
  (interactive)
  (let ((mime-viewer/decoding-mode "play"))
    (mime-preview/decode-content)
    ))

(defun mime-viewer/extract-content ()
  (interactive)
  (let ((mime-viewer/decoding-mode "extract"))
    (mime-preview/decode-content)
    ))

(defun mime-viewer/print-content ()
  (interactive)
  (let ((mime-viewer/decoding-mode "print"))
    (mime-preview/decode-content)
    ))

(defun mime-viewer/follow-content ()
  (interactive)
  (let ((root-cinfo
	 (mime::preview-content-info/content-info
	  (car mime::preview/content-list)))
	pc p-beg p-end cinfo rcnum)
    (let ((rest mime::preview/content-list)
	  b e cell len rc)
      (if (catch 'tag
	    (while (setq cell (car rest))
	      (setq b (mime::preview-content-info/point-min cell)
		    e (mime::preview-content-info/point-max cell))
	      (setq rest (cdr rest))
	      (if (and (<= b (point))(<= (point) e))
		  (throw 'tag cell)
		)
	      ))
	  (progn
	    (setq pc cell
		  cinfo (mime::preview-content-info/content-info pc)
		  rcnum (mime::content-info/rcnum cinfo))
	    (setq len (length rcnum))
	    (setq p-beg (mime::preview-content-info/point-min pc)
		  p-end (mime::preview-content-info/point-max pc))
	    (while (and (setq cell (car rest))
			(progn
			  (setq rc
				(mime::content-info/rcnum
				 (mime::preview-content-info/content-info
				  cell)))
			  (equal rcnum
				 (nthcdr (- (length rc) len) rc))
			  ))
	      (setq p-end (mime::preview-content-info/point-max cell))
	      (setq rest (cdr rest))
	      ))))
    (if pc
	(let* ((mode (mime-preview/get-original-major-mode))
	       (new-name (format "%s-%s" (buffer-name) (reverse rcnum)))
	       new-buf
	       (the-buf (current-buffer))
	       (a-buf mime::preview/article-buffer)
	       (hb (mime::content-info/point-min cinfo))
	       (he (mime::content-info/point-max cinfo))
	       fields from to cc reply-to subj mid f)
	  (save-excursion
	    (set-buffer (setq new-buf (get-buffer-create new-name)))
	    (erase-buffer)
	    (insert-buffer-substring the-buf p-beg p-end)
	    (goto-char (point-min))
	    (if (mime-viewer/header-visible-p rcnum root-cinfo)
		(delete-region (goto-char (point-min))
			       (if (re-search-forward "^$" nil t)
				   (match-end 0)
				 (point-min)))
	      )
	    (goto-char (point-min))
	    (insert "\n")
	    (goto-char (point-min))
	    (let ((rcnum (mime::content-info/rcnum cinfo)) ci str)
	      (while (progn
		       (setq str
			     (save-excursion
			       (set-buffer a-buf)
			       (setq ci (mime-article/rcnum-to-cinfo rcnum))
			       (save-restriction
				 (narrow-to-region
				  (mime::content-info/point-min ci)
				  (mime::content-info/point-max ci)
				  )
				 (std11-header-string-except
				  (concat "^"
					  (apply (function regexp-or) fields)
					  ":") ""))))
		       (if (string-equal (mime::content-info/type ci)
					 "message/rfc822")
			   nil
			 (if str
			     (insert str)
			   )
			 rcnum))
		(setq fields (std11-collect-field-names)
		      rcnum (cdr rcnum))
		)
	      )
	    (let ((rest mime-viewer/following-required-fields-list))
	      (while rest
		(let ((field-name (car rest)))
		  (or (std11-field-body field-name)
		      (insert
		       (format
			(concat field-name
				": "
				(save-excursion
				  (set-buffer the-buf)
				  (set-buffer mime::preview/mother-buffer)
				  (set-buffer mime::preview/article-buffer)
				  (std11-field-body field-name)
				  )
				"\n")))
		      ))
		(setq rest (cdr rest))
		))
	    (mime/decode-message-header)
	    )
	  (let ((f (cdr (assq mode mime-viewer/following-method-alist))))
	    (if (functionp f)
		(funcall f new-buf)
	      (message
	       (format
		"Sorry, following method for %s is not implemented yet."
		mode))
	      ))
	  ))))

(defun mime-viewer/display-x-face ()
  (interactive)
  (save-window-excursion
    (set-buffer mime::preview/article-buffer)
    (mime-viewer/x-face-function)
    ))

(defun mime-viewer/up-content ()
  (interactive)
  (let* ((pc (mime-preview/point-pcinfo (point)))
	 (cinfo (mime::preview-content-info/content-info pc))
	 (rcnum (mime::content-info/rcnum cinfo))
	 )
    (if rcnum
	(let ((r (save-excursion
		   (set-buffer (mime::preview-content-info/buffer pc))
                   (mime-article/rcnum-to-cinfo (cdr rcnum))
		   ))
	      (rpcl mime::preview/content-list)
	      cell)
	  (while (and
		  (setq cell (car rpcl))
		  (not (eq r (mime::preview-content-info/content-info cell)))
		  )
	    (setq rpcl (cdr rpcl))
	    )
	  (goto-char (mime::preview-content-info/point-min cell))
	  )
      (mime-viewer/quit)
      )))

(defun mime-viewer/previous-content ()
  (interactive)
  (let* ((pcl mime::preview/content-list)
	 (p (point))
	 (i (- (length pcl) 1))
	 beg)
    (catch 'tag
      (while (> i 0)
	(setq beg (mime::preview-content-info/point-min (nth i pcl)))
	(if (> p beg)
	    (throw 'tag (goto-char beg))
	  )
	(setq i (- i 1))
	)
      (let ((f (assq mime::preview/original-major-mode
		     mime-viewer/over-to-previous-method-alist)))
	(if f
	    (funcall (cdr f))
	  ))
      )
    ))

(defun mime-viewer/next-content ()
  (interactive)
  (let ((pcl mime::preview/content-list)
	(p (point))
	beg)
    (catch 'tag
      (while pcl
	(setq beg (mime::preview-content-info/point-min (car pcl)))
	(if (< p beg)
	    (throw 'tag (goto-char beg))
	  )
	(setq pcl (cdr pcl))
	)
      (let ((f (assq mime::preview/original-major-mode
		     mime-viewer/over-to-next-method-alist)))
	(if f
	    (funcall (cdr f))
	  ))
      )
    ))

(defun mime-viewer/scroll-up-content (&optional h)
  (interactive)
  (or h
      (setq h (- (window-height) 1))
      )
  (if (= (point) (point-max))
      (let ((f (assq mime::preview/original-major-mode
                     mime-viewer/over-to-next-method-alist)))
        (if f
            (funcall (cdr f))
          ))
    (let ((pcl mime::preview/content-list)
          (p (point))
          np beg)
      (setq np
            (or (catch 'tag
                  (while pcl
                    (setq beg (mime::preview-content-info/point-min (car pcl)))
                    (if (< p beg)
                        (throw 'tag beg)
                      )
                    (setq pcl (cdr pcl))
                    ))
                (point-max)))
      (forward-line h)
      (if (> (point) np)
          (goto-char np)
        )
      ;;(show-subtree)
      ))
  )

(defun mime-viewer/scroll-down-content (&optional h)
  (interactive)
  (or h
      (setq h (- (window-height) 1))
      )
  (if (= (point) (point-min))
      (let ((f (assq mime::preview/original-major-mode
                     mime-viewer/over-to-previous-method-alist)))
        (if f
            (funcall (cdr f))
          ))
    (let ((pcl mime::preview/content-list)
          (p (point))
          pp beg)
      (setq pp
            (or (let ((i (- (length pcl) 1)))
                  (catch 'tag
                    (while (> i 0)
                      (setq beg (mime::preview-content-info/point-min
                                 (nth i pcl)))
                      (if (> p beg)
                          (throw 'tag beg)
                        )
                      (setq i (- i 1))
                      )))
                (point-min)))
      (forward-line (- h))
      (if (< (point) pp)
          (goto-char pp)
        )))
  )

(defun mime-viewer/next-line-content ()
  (interactive)
  (mime-viewer/scroll-up-content 1)
  )

(defun mime-viewer/previous-line-content ()
  (interactive)
  (mime-viewer/scroll-down-content 1)
  )

(defun mime-viewer/quit ()
  (interactive)
  (let ((r (save-excursion
	     (set-buffer (mime::preview-content-info/buffer
			  (mime-preview/point-pcinfo (point))))
	     (assq major-mode mime-viewer/quitting-method-alist)
	     )))
    (if r
	(funcall (cdr r))
      )))

(defun mime-viewer/show-summary ()
  (interactive)
  (let ((r (save-excursion
	     (set-buffer
	      (mime::preview-content-info/buffer
	       (mime-preview/point-pcinfo (point)))
	      )
	     (assq major-mode mime-viewer/show-summary-method)
	     )))
    (if r
	(funcall (cdr r))
      )))

(defun mime-viewer/kill-buffer ()
  (interactive)
  (kill-buffer (current-buffer))
  )


;;; @ end
;;;

(provide 'tm-view)

(run-hooks 'tm-view-load-hook)

;;; tm-view.el ends here