(mime-view-display-entity): Don't set up text-property
[elisp/semi.git] / mime-view.el
index 51d8cb0..a2531e6 100644 (file)
@@ -1,15 +1,14 @@
 ;;; mime-view.el --- interactive MIME viewer for GNU Emacs
 
-;; Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
+;; Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
 
 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
-;; Created: 1994/7/13
-;;     Renamed: 1994/8/31 from tm-body.el
+;; Created: 1994/07/13
+;;     Renamed: 1994/08/31 from tm-body.el
 ;;     Renamed: 1997/02/19 from tm-view.el
-;; Version: $Revision: 0.40 $
 ;; Keywords: MIME, multimedia, mail, news
 
-;; This file is part of SEMI (SEMI is Emacs MIME Interfaces).
+;; This file is part of SEMI (Sophisticated Emacs MIME Interfaces).
 
 ;; This program is free software; you can redistribute it and/or
 ;; modify it under the terms of the GNU General Public License as
 
 ;;; Code:
 
-(require 'cl)
 (require 'std11)
 (require 'mel)
 (require 'eword-decode)
 (require 'mime-parse)
-(require 'mime-text)
+(require 'semi-def)
+(require 'calist)
+(require 'alist)
+(require 'mailcap)
 
 
 ;;; @ version
 ;;;
 
-(defconst mime-view-RCS-ID
-  "$Id: mime-view.el,v 0.40 1997-03-17 13:11:10 morioka Exp $")
-
-(defconst mime-view-version (get-version-string mime-view-RCS-ID))
+(defconst mime-view-version-string
+  `,(concat (car mime-module-version) " MIME-View "
+           (mapconcat #'number-to-string (cddr mime-module-version) ".")
+           " (" (cadr mime-module-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")
-     )
-    ((type . "message/external-body")
-     ("access-type" . "anon-ftp")
-     (method . mime-article/decode-message/external-ftp)
-     )
-    
-    ((method "metamail" t "-m" "tm" "-x" "-d" "-z" "-e" 'file)
-     (mode . "play")
-     )
-    ((method "tm-file"  nil 'file 'type 'encoding 'mode 'name)
-     (mode . "extract")
-     )
-    ))
+(defgroup mime-view nil
+  "MIME view mode"
+  :group 'mime)
 
-(defvar mime-view-childrens-header-showing-Content-Type-list
-  '("message/rfc822" "message/news"))
+(defcustom mime-view-find-every-acting-situation t
+  "*Find every available acting-situation if non-nil."
+  :group 'mime-view
+  :type 'boolean)
 
-(defvar mime-view-visible-media-type-list
-  '("text/plain" nil "text/richtext" "text/enriched"
-    "text/rfc822-headers"
-    "text/x-latex" "application/x-latex"
-    "message/delivery-status"
-    "application/pgp" "text/x-pgp"
-    "application/octet-stream"
-    "application/x-selection" "application/x-comment")
-  "*List of media-types to be able to display in MIME-View buffer.
-Each elements are string of TYPE/SUBTYPE, e.g. \"text/plain\".")
+(defcustom mime-acting-situation-examples-file "~/.mime-example"
+  "*File name of example about acting-situation demonstrated by user."
+  :group 'mime-view
+  :type 'file)
 
-(defvar mime-view-content-button-ignored-ctype-list
-  '("application/x-selection"))
 
-(defvar mime-view-content-button-visible-ctype-list
-  '("application/pgp"))
+;;; @ buffer local variables
+;;;
 
-(defvar mime-view-uuencode-encoding-name-list '("x-uue" "x-uuencode"))
+;;; @@ in raw-buffer
+;;;
 
-(defvar mime-view-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. [mime-view.el]")
+(defvar mime-raw-message-info nil
+  "Information about structure of message.
+Please use reference function `mime-entity-SLOT' to get value of SLOT.
 
-(defvar mime-view-ignored-field-regexp
-  (concat "^"
-         (apply (function regexp-or) mime-view-ignored-field-list)
-         ":"))
+Following is a list of slots of the structure:
 
-(defvar mime-view-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. [mime-view.el]")
+buffer                 buffer includes this entity (buffer).
+node-id                        node-id (list of integers)
+header-start           minimum point of header in raw-buffer
+header-end             maximum point of header in raw-buffer
+body-start             minimum point of body in raw-buffer
+body-end               maximum point of body in raw-buffer
+content-type           content-type (content-type)
+content-disposition    content-disposition (content-disposition)
+encoding               Content-Transfer-Encoding (string or nil)
+children               entities included in this entity (list of entity)
 
-(defvar mime-view-visible-field-regexp
-  (concat "^"
-         (apply (function regexp-or) mime-view-visible-field-list)
-         ":"))
+If an entity includes other entities in its body, such as multipart or
+message/rfc822, `mime-entity' structures of them are included in
+`children', so the `mime-entity' structure become a tree.")
+(make-variable-buffer-local 'mime-raw-message-info)
 
-(defvar mime-view-redisplay nil)
 
-(defvar mime-view-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.         ]]"
-    ))
+(defvar mime-preview-buffer nil
+  "MIME-preview buffer corresponding with the (raw) buffer.")
+(make-variable-buffer-local 'mime-preview-buffer)
+
 
+(defvar mime-raw-representation-type nil
+  "Representation-type of mime-raw-buffer.
+It must be nil, `binary' or `cooked'.
+If it is nil, `mime-raw-representation-type-alist' is used as default
+value.
+Notice that this variable is usually used as buffer local variable in
+raw-buffer.")
 
-;;; @@ predicate functions
+(make-variable-buffer-local 'mime-raw-representation-type)
+
+(defvar mime-raw-representation-type-alist
+  '((mime-show-message-mode     . binary)
+    (mime-temp-message-mode     . binary)
+    (t                          . cooked)
+    )
+  "Alist of major-mode vs. representation-type of mime-raw-buffer.
+Each element looks like (SYMBOL . REPRESENTATION-TYPE).  SYMBOL is
+major-mode or t.  t means default.  REPRESENTATION-TYPE must be
+`binary' or `cooked'.
+This value is overridden by buffer local variable
+`mime-raw-representation-type' if it is not nil.")
+
+
+;;; @@ in preview-buffer
 ;;;
 
-(defun mime-view-header-visible-p (rcnum cinfo &optional ctype)
-  "Return non-nil if header of current entity is visible."
-  (or (null rcnum)
-      (progn
-       (or ctype
-           (setq ctype
-                 (mime::content-info/type
-                  (mime-article/rcnum-to-cinfo (cdr rcnum) cinfo)
-                  )))
-       (member ctype mime-view-childrens-header-showing-Content-Type-list)
-       )))
+(defvar mime-mother-buffer nil
+  "Mother buffer corresponding with the (MIME-preview) buffer.
+If current MIME-preview buffer is generated by other buffer, such as
+message/partial, it is called `mother-buffer'.")
+(make-variable-buffer-local 'mime-mother-buffer)
 
-(defun mime-view-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-view-visible-media-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))
-    ))
+(defvar mime-raw-buffer nil
+  "Raw buffer corresponding with the (MIME-preview) buffer.")
+(make-variable-buffer-local 'mime-raw-buffer)
+
+(defvar mime-preview-original-window-configuration nil
+  "Window-configuration before mime-view-mode is called.")
+(make-variable-buffer-local 'mime-preview-original-window-configuration)
 
 
-;;; @@ content button
+;;; @ entity information
 ;;;
 
-(defun mime-view-insert-entity-button (rcnum cinfo ctype params subj encoding)
-  "Insert entity-button."
-  (save-restriction
-    (narrow-to-region (point)(point))
-    (let ((access-type (assoc "access-type" params))
-         (num (or (cdr (assoc "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 (cdr (assoc "site" params)))
-                      (dir (cdr (assoc "directory" params)))
-                      )
-                  (insert (format "[%s %s ([%s] %s:%s)]\n" num subj
-                                  access-type site dir))
-                  )))
-            )
-           (t
-            (let ((charset (cdr (assoc "charset" params))))
-              (insert (concat "[" num " " subj))
+(defsubst mime-raw-find-entity-from-node-id (entity-node-id
+                                            &optional message-info)
+  "Return entity from ENTITY-NODE-ID in mime-raw-buffer.
+If optional argument MESSAGE-INFO is not specified,
+`mime-raw-message-info' is used."
+  (mime-raw-find-entity-from-number (reverse entity-node-id) message-info))
+
+(defun mime-raw-find-entity-from-number (entity-number &optional message-info)
+  "Return entity from ENTITY-NUMBER in mime-raw-buffer.
+If optional argument MESSAGE-INFO is not specified,
+`mime-raw-message-info' is used."
+  (or message-info
+      (setq message-info mime-raw-message-info))
+  (if (eq entity-number t)
+      message-info
+    (let ((sn (car entity-number)))
+      (if (null sn)
+         message-info
+       (let ((rc (nth sn (mime-entity-children message-info))))
+         (if rc
+             (mime-raw-find-entity-from-number (cdr entity-number) rc)
+           ))
+       ))))
+
+(defun mime-raw-find-entity-from-point (point &optional message-info)
+  "Return entity from POINT in mime-raw-buffer.
+If optional argument MESSAGE-INFO is not specified,
+`mime-raw-message-info' is used."
+  (or message-info
+      (setq message-info mime-raw-message-info))
+  (if (and (<= (mime-entity-point-min message-info) point)
+          (<= point (mime-entity-point-max message-info)))
+      (let ((children (mime-entity-children message-info)))
+       (catch 'tag
+         (while children
+           (let ((ret
+                  (mime-raw-find-entity-from-point point (car children))))
+             (if ret
+                 (throw 'tag ret)
+               ))
+           (setq children (cdr children)))
+         message-info))))
+
+
+(defsubst mime-entity-parent (entity &optional message-info)
+  "Return mother entity of ENTITY.
+If optional argument MESSAGE-INFO is not specified,
+`mime-raw-message-info' in buffer of ENTITY is used."
+  (mime-raw-find-entity-from-node-id
+   (cdr (mime-entity-node-id entity))
+   (or message-info
+       (save-excursion
+        (set-buffer (mime-entity-buffer entity))
+        mime-raw-message-info))))
+
+(defsubst mime-entity-situation (entity)
+  "Return situation of ENTITY."
+  (append (or (mime-entity-content-type entity)
+             (make-mime-content-type 'text 'plain))
+         (list (cons 'encoding (mime-entity-encoding entity))
+               (cons 'major-mode
+                     (save-excursion
+                       (set-buffer (mime-entity-buffer entity))
+                       major-mode)))
+         ))
+
+
+(defvar mime-view-uuencode-encoding-name-list '("x-uue" "x-uuencode"))
+
+(defun mime-raw-get-uu-filename ()
+  (save-excursion
+    (if (re-search-forward "^begin [0-9]+ " nil t)
+       (if (looking-at ".+$")
+           (buffer-substring (match-beginning 0)(match-end 0))
+         ))))
+
+(defun mime-raw-get-subject (entity)
+  (or (std11-find-field-body '("Content-Description" "Subject"))
+      (let ((ret (mime-entity-content-disposition entity)))
+       (and ret
+            (setq ret (mime-content-disposition-filename ret))
+            (std11-strip-quoted-string ret)
+            ))
+      (let ((ret (mime-entity-content-type entity)))
+       (and ret
+            (setq ret
+                  (cdr
+                   (let ((param (mime-content-type-parameters ret)))
+                     (or (assoc "name" param)
+                         (assoc "x-name" param))
+                     )))
+            (std11-strip-quoted-string ret)
+            ))
+      (if (member (mime-entity-encoding entity)
+                 mime-view-uuencode-encoding-name-list)
+         (mime-raw-get-uu-filename))
+      ""))
+
+
+(defsubst mime-raw-point-to-entity-node-id (point &optional message-info)
+  "Return entity-node-id from POINT in mime-raw-buffer.
+If optional argument MESSAGE-INFO is not specified,
+`mime-raw-message-info' is used."
+  (mime-entity-node-id (mime-raw-find-entity-from-point point message-info)))
+
+(defsubst mime-raw-point-to-entity-number (point &optional message-info)
+  "Return entity-number from POINT in mime-raw-buffer.
+If optional argument MESSAGE-INFO is not specified,
+`mime-raw-message-info' is used."
+  (mime-entity-number (mime-raw-find-entity-from-point point message-info)))
+
+(defun mime-raw-flatten-message-info (&optional message-info)
+  "Return list of entity in mime-raw-buffer.
+If optional argument MESSAGE-INFO is not specified,
+`mime-raw-message-info' is used."
+  (or message-info
+      (setq message-info mime-raw-message-info))
+  (let ((dest (list message-info))
+       (rcl (mime-entity-children message-info)))
+    (while rcl
+      (setq dest (nconc dest (mime-raw-flatten-message-info (car rcl))))
+      (setq rcl (cdr rcl)))
+    dest))
+
+
+;;; @ presentation of preview
+;;;
+
+;;; @@ entity-button
+;;;
+
+;;; @@@ predicate function
+;;;
+
+(defun mime-view-entity-button-visible-p (entity)
+  "Return non-nil if header of ENTITY is visible.
+Please redefine this function if you want to change default setting."
+  (let ((media-type (mime-entity-media-type entity))
+       (media-subtype (mime-entity-media-subtype entity)))
+    (or (not (eq media-type 'application))
+       (and (not (eq media-subtype 'x-selection))
+            (or (not (eq media-subtype 'octet-stream))
+                (let ((mother-entity (mime-entity-parent entity)))
+                  (or (not (eq (mime-entity-media-type mother-entity)
+                               'multipart))
+                      (not (eq (mime-entity-media-subtype mother-entity)
+                               'encrypted)))
+                  )
+                )))))
+
+;;; @@@ entity button generator
+;;;
+
+(defun mime-view-insert-entity-button (entity subject)
+  "Insert entity-button of ENTITY."
+  (let ((entity-node-id (mime-entity-node-id entity))
+       (params (mime-entity-parameters entity)))
+    (mime-insert-button
+     (let ((access-type (assoc "access-type" params))
+          (num (or (cdr (assoc "x-part-number" params))
+                   (if (consp entity-node-id)
+                       (mapconcat (function
+                                   (lambda (num)
+                                     (format "%s" (1+ num))
+                                     ))
+                                  (reverse entity-node-id) ".")
+                     "0"))
+               ))
+       (cond (access-type
+             (let ((server (assoc "server" params)))
+               (setq access-type (cdr access-type))
+               (if server
+                   (format "%s %s ([%s] %s)"
+                           num subject access-type (cdr server))
+               (let ((site (cdr (assoc "site" params)))
+                     (dir (cdr (assoc "directory" params)))
+                     )
+                 (format "%s %s ([%s] %s:%s)"
+                         num subject access-type site dir)
+                 )))
+           )
+          (t
+           (let ((media-type (mime-entity-media-type entity))
+                 (media-subtype (mime-entity-media-subtype entity))
+                 (charset (cdr (assoc "charset" params)))
+                 (encoding (mime-entity-encoding entity)))
+             (concat
+              num " " subject
               (let ((rest
-                     (concat " <" ctype
+                     (format " <%s/%s%s%s>"
+                             media-type media-subtype
                              (if charset
                                  (concat "; " charset)
-                               (if encoding (concat " (" encoding ")"))
-                               )
-                             ">]\n")))
+                               "")
+                             (if encoding
+                                 (concat " (" encoding ")")
+                               ""))))
                 (if (>= (+ (current-column)(length rest))(window-width))
-                    (insert "\n\t")
-                  )
-                (insert rest)
-                ))))
-      )
-    (mime-add-button (point-min)(1- (point-max))
-                    (function mime-view-play-current-entity))
-    ))
-
-(defun mime-preview/default-content-button-function
-  (rcnum cinfo ctype params subj encoding)
-  (if (and (consp rcnum)
-          (not (member
-                ctype
-                mime-view-content-button-ignored-ctype-list)))
-      (mime-view-insert-entity-button
-       rcnum cinfo ctype params subj encoding)
+                    "\n\t")
+                rest)))
+           )))
+     (function mime-preview-play-current-entity))
     ))
 
-(defvar mime-preview/content-button-function
-  (function mime-preview/default-content-button-function))
 
+;;; @@ entity-header
+;;;
 
-;;; @@ content header filter
+;;; @@@ entity header filter
 ;;;
 
-(defun mime-preview/cut-header ()
-  (goto-char (point-min))
-  (while (and
-         (re-search-forward mime-view-ignored-field-regexp nil t)
-         (let* ((beg (match-beginning 0))
-                (end (match-end 0))
-                (name (buffer-substring beg end))
-                )
-           (if (not (string-match mime-view-visible-field-regexp name))
-               (delete-region
-                beg
-                (save-excursion
-                  (and
-                   (re-search-forward "^\\([^ \t]\\|$\\)" nil t)
-                   (match-beginning 0)
-                   )))
-             )
-           t)))
-  )
+(defvar mime-view-content-header-filter-alist nil)
 
 (defun mime-view-default-content-header-filter ()
-  (mime-preview/cut-header)
+  (mime-view-cut-header)
   (eword-decode-header)
   )
 
-(defvar mime-view-content-header-filter-alist nil)
-
-
-;;; @@ content filter
+;;; @@@ entity field cutter
 ;;;
 
-(defvar mime-view-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)
-    ))
+(defvar mime-view-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.")
 
+(defvar mime-view-ignored-field-regexp
+  (concat "^"
+         (apply (function regexp-or) mime-view-ignored-field-list)
+         ":"))
 
-;;; @@ content separator
-;;;
+(defvar mime-view-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.")
 
-(defun mime-preview/default-content-separator (rcnum cinfo ctype params subj)
-  (if (and (not (mime-view-header-visible-p rcnum cinfo ctype))
-          (not (mime-view-body-visible-p rcnum cinfo ctype))
+(defun mime-view-cut-header ()
+  (goto-char (point-min))
+  (while (re-search-forward mime-view-ignored-field-regexp nil t)
+    (let* ((beg (match-beginning 0))
+          (end (match-end 0))
+          (name (buffer-substring beg end))
           )
-      (progn
-       (goto-char (point-max))
-       (insert "\n")
-       )))
+      (catch 'visible
+       (let ((rest mime-view-visible-field-list))
+         (while rest
+           (if (string-match (car rest) name)
+               (throw 'visible nil)
+             )
+           (setq rest (cdr rest))))
+       (delete-region beg
+                      (save-excursion
+                        (if (re-search-forward "^\\([^ \t]\\|$\\)" nil t)
+                            (match-beginning 0)
+                          (point-max))))
+       ))))
 
 
-;;; @@ buffer local variables
+;;; @@ entity-body
 ;;;
 
-;;; @@@ in raw buffer
+;;; @@@ predicate function
 ;;;
 
-(make-variable-buffer-local 'mime::article/content-info)
+(defun mime-calist::field-match-method-as-default-rule (calist
+                                                       field-type field-value)
+  (let ((s-field (assq field-type calist)))
+    (cond ((null s-field)
+          (cons (cons field-type field-value) calist)
+          )
+         (t calist))))
+
+(define-calist-field-match-method
+  'header #'mime-calist::field-match-method-as-default-rule)
+
+(define-calist-field-match-method
+  'body #'mime-calist::field-match-method-as-default-rule)
+
+
+(defvar mime-preview-condition nil
+  "Condition-tree about how to display entity.")
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . application)(subtype . octet-stream)
+                          (encoding . nil)
+                          (body . visible)))
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . application)(subtype . octet-stream)
+                          (encoding . "7bit")
+                          (body . visible)))
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . application)(subtype . octet-stream)
+                          (encoding . "8bit")
+                          (body . visible)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . application)(subtype . pgp)
+                          (body . visible)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . application)(subtype . x-latex)
+                          (body . visible)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . application)(subtype . x-selection)
+                          (body . visible)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . application)(subtype . x-comment)
+                          (body . visible)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . message)(subtype . delivery-status)
+                          (body . visible)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition
+ '((body . visible)
+   (body-presentation-method . mime-preview-text/plain)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition
+ '((type . nil)
+   (body . visible)
+   (body-presentation-method . mime-preview-text/plain)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition
+ '((type . text)(subtype . enriched)
+   (body . visible)
+   (body-presentation-method . mime-preview-text/enriched)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition
+ '((type . text)(subtype . richtext)
+   (body . visible)
+   (body-presentation-method . mime-preview-text/richtext)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition
+ '((type . text)(subtype . t)
+   (body . visible)
+   (body-presentation-method . mime-preview-text/plain)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition
+ '((type . multipart)(subtype . alternative)
+   (body . visible)
+   (body-presentation-method . mime-preview-multipart/alternative)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . message)(subtype . partial)
+                          (body-presentation-method
+                           . mime-preview-message/partial-button)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . message)(subtype . rfc822)
+                          (body-presentation-method . nil)
+                          (childrens-situation (header . visible)
+                                               (entity-button . invisible))))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition '((type . message)(subtype . news)
+                          (body-presentation-method . nil)
+                          (childrens-situation (header . visible)
+                                               (entity-button . invisible))))
+
+
+;;; @@@ entity presentation
+;;;
 
-(defvar mime::article/preview-buffer nil)
-(make-variable-buffer-local 'mime::article/preview-buffer)
+(autoload 'mime-preview-text/plain "mime-text")
+(autoload 'mime-preview-text/enriched "mime-text")
+(autoload 'mime-preview-text/richtext "mime-text")
 
+(defvar mime-view-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.         ]]"
+    ))
 
-;;; @@@ in view buffer
-;;;
+(defun mime-preview-message/partial-button (&optional entity situation)
+  (save-restriction
+    (goto-char (point-max))
+    (if (not (search-backward "\n\n" nil t))
+       (insert "\n")
+      )
+    (goto-char (point-max))
+    (narrow-to-region (point-max)(point-max))
+    (insert mime-view-announcement-for-message/partial)
+    (mime-add-button (point-min)(point-max)
+                    #'mime-preview-play-current-entity)
+    ))
 
-(make-variable-buffer-local 'mime::preview/mother-buffer)
-(make-variable-buffer-local 'mime::preview/content-list)
+(defun mime-preview-multipart/mixed (entity situation)
+  (let ((children (mime-entity-children entity))
+       (default-situation
+         (cdr (assq 'childrens-situation situation))))
+    (while children
+      (mime-view-display-entity (car children)
+                               (save-excursion
+                                 (set-buffer (mime-entity-buffer entity))
+                                 mime-raw-message-info)
+                               (current-buffer)
+                               default-situation)
+      (setq children (cdr children))
+      )))
+
+(defcustom mime-view-type-subtype-score-alist
+  '(((text . enriched) . 3)
+    ((text . richtext) . 2)
+    ((text . plain)    . 1)
+    (t . 0))
+  "Alist MEDIA-TYPE vs corresponding score.
+MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
+  :group 'mime-view
+  :type '(repeat (cons (choice :tag "Media-Type"
+                              (item :tag "Type/Subtype"
+                                    (cons symbol symbol))
+                              (item :tag "Type" symbol)
+                              (item :tag "Default" t))
+                      integer)))
+
+(defun mime-preview-multipart/alternative (entity situation)
+  (let* ((children (mime-entity-children entity))
+        (default-situation
+          (cdr (assq 'childrens-situation situation)))
+        (i 0)
+        (p 0)
+        (max-score 0)
+        (situations
+         (mapcar (function
+                  (lambda (child)
+                    (let ((situation
+                           (or (ctree-match-calist
+                                mime-preview-condition
+                                (append (mime-entity-situation child)
+                                        default-situation))
+                               default-situation)))
+                      (if (cdr (assq 'body-presentation-method situation))
+                          (let ((score
+                                 (cdr
+                                  (or (assoc
+                                       (cons
+                                        (cdr (assq 'type situation))
+                                        (cdr (assq 'subtype situation)))
+                                       mime-view-type-subtype-score-alist)
+                                      (assq
+                                       (cdr (assq 'type situation))
+                                       mime-view-type-subtype-score-alist)
+                                      (assq
+                                       t
+                                       mime-view-type-subtype-score-alist)
+                                      ))))
+                            (if (> score max-score)
+                                (setq p i
+                                      max-score score)
+                              )))
+                      (setq i (1+ i))
+                      situation)
+                    ))
+                 children)))
+    (setq i 0)
+    (while children
+      (let ((child (car children))
+           (situation (car situations)))
+       (mime-view-display-entity child
+                                 (save-excursion
+                                   (set-buffer (mime-entity-buffer child))
+                                   mime-raw-message-info)
+                                 (current-buffer)
+                                 default-situation
+                                 (if (= i p)
+                                     situation
+                                   (del-alist 'body-presentation-method
+                                              (copy-alist situation))))
+       )
+      (setq children (cdr children)
+           situations (cdr situations)
+           i (1+ i))
+      )))
 
-(defvar mime::preview/article-buffer nil)
-(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)
+;;; @ acting-condition
+;;;
 
+(defvar mime-acting-condition nil
+  "Condition-tree about how to process entity.")
+
+(if (file-readable-p mailcap-file)
+    (let ((entries (mailcap-parse-file)))
+      (while entries
+       (let ((entry (car entries))
+             view print shared)
+         (while entry
+           (let* ((field (car entry))
+                  (field-type (car field)))
+             (cond ((eq field-type 'view)  (setq view field))
+                   ((eq field-type 'print) (setq print field))
+                   ((memq field-type '(compose composetyped edit)))
+                   (t (setq shared (cons field shared))))
+             )
+           (setq entry (cdr entry))
+           )
+         (setq shared (nreverse shared))
+         (ctree-set-calist-with-default
+          'mime-acting-condition
+          (append shared (list '(mode . "play")(cons 'method (cdr view)))))
+         (if print
+             (ctree-set-calist-with-default
+              'mime-acting-condition
+              (append shared
+                      (list '(mode . "print")(cons 'method (cdr view))))
+              ))
+         )
+       (setq entries (cdr entries))
+       )))
 
-;;; @@ quitting method
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . t)(subtype . t)(mode . "extract")
+;;    (method . mime-method-to-save)))
+(ctree-set-calist-with-default
+ 'mime-acting-condition
+ '((mode . "extract")
+   (method . mime-method-to-save)))
+
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . text)(subtype . plain)(mode . "play")
+;;    (method "tm-plain" nil 'file "" 'encoding 'mode 'name)
+;;    ))
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . text)(subtype . plain)(mode . "print")
+;;    (method "tm-plain" nil 'file "" 'encoding 'mode 'name)
+;;    ))
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . text)(subtype . html)(mode . "play")
+;;    (method "tm-html" nil 'file "" 'encoding 'mode 'name)
+;;    ))
+(ctree-set-calist-strictly
+ 'mime-acting-condition
+ '((type . text)(subtype . x-rot13-47)(mode . "play")
+   (method . mime-method-to-display-caesar)
+   ))
+(ctree-set-calist-strictly
+ 'mime-acting-condition
+ '((type . text)(subtype . x-rot13-47-48)(mode . "play")
+   (method . mime-method-to-display-caesar)
+   ))
+
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . audio)(subtype . basic)(mode . "play")
+;;    (method "tm-au" nil 'file "" 'encoding 'mode 'name)
+;;    ))
+
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . image)(mode . "play")
+;;    (method "tm-image" nil 'file "" 'encoding 'mode 'name)
+;;    ))
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . image)(mode . "print")
+;;    (method "tm-image" nil 'file "" 'encoding 'mode 'name)
+;;    ))
+
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . video)(subtype . mpeg)(mode . "play")
+;;    (method "tm-mpeg" nil 'file "" 'encoding 'mode 'name)
+;;    ))
+
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . application)(subtype . postscript)(mode . "play")
+;;    (method "tm-ps" nil 'file "" 'encoding 'mode 'name)
+;;    ))
+;; (ctree-set-calist-strictly
+;;  'mime-acting-condition
+;;  '((type . application)(subtype . postscript)(mode . "print")
+;;    (method "tm-ps" nil 'file "" 'encoding 'mode 'name)
+;;    ))
+
+(ctree-set-calist-strictly
+ 'mime-acting-condition
+ '((type . message)(subtype . rfc822)(mode . "play")
+   (method . mime-method-to-display-message/rfc822)
+   ))
+(ctree-set-calist-strictly
+ 'mime-acting-condition
+ '((type . message)(subtype . partial)(mode . "play")
+   (method . mime-method-to-store-message/partial)
+   ))
+
+(ctree-set-calist-strictly
+ 'mime-acting-condition
+ '((type . message)(subtype . external-body)
+   ("access-type" . "anon-ftp")
+   (method . mime-method-to-display-message/external-ftp)
+   ))
+
+(ctree-set-calist-strictly
+ 'mime-acting-condition
+ '((type . application)(subtype . octet-stream)
+   (method . mime-method-to-save)
+   ))
+
+
+;;; @ quitting method
 ;;;
 
-(defvar mime-view-quitting-method-alist
-  '((mime/show-message-mode
-     . mime-view-quitting-method-for-mime/show-message-mode)))
+(defvar mime-preview-quitting-method-alist
+  '((mime-show-message-mode
+     . mime-preview-quitting-method-for-mime-show-message-mode))
+  "Alist of major-mode vs. quitting-method of mime-view.")
 
 (defvar mime-view-over-to-previous-method-alist nil)
 (defvar mime-view-over-to-next-method-alist nil)
 
-(defvar mime-view-show-summary-method nil)
+(defvar mime-view-show-summary-method nil
+  "Alist of major-mode vs. show-summary-method.")
 
 
-;;; @@ following method
+;;; @ following method
 ;;;
 
-(defvar mime-view-following-method-alist nil)
+(defvar mime-view-following-method-alist nil
+  "Alist of major-mode vs. following-method of mime-view.")
 
 (defvar mime-view-following-required-fields-list
   '("From"))
 
 
-;;; @@ X-Face
+;;; @ X-Face
 ;;;
 
 ;; hack from Gnus 5.0.4.
@@ -427,283 +819,93 @@ The compressed face will be piped to this 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-view-setup-buffer (&optional ctl encoding ibuf obuf)
-  (if ibuf
-      (progn
-       (get-buffer ibuf)
-       (set-buffer ibuf)
-       ))
-  (or mime-view-redisplay
-      (setq mime::article/content-info (mime-parse-message ctl encoding))
-      )
-  (let ((ret (mime-view-make-preview-buffer obuf)))
-    (setq mime::article/preview-buffer (car ret))
-    ret))
-
-(defun mime-view-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-view-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 "^$" nil t)
-                (1+ (match-end 0))
-              end))
-    (if (> he end)
-       (setq he end)
+(defun mime-view-display-entity (entity message-info obuf
+                                       default-situation
+                                       &optional situation)
+  (let* ((raw-buffer (mime-entity-buffer entity))
+        (start (mime-entity-point-min entity))
+        (end (mime-entity-point-max entity))
+        original-major-mode end-of-header e nb ne subj)
+    (set-buffer raw-buffer)
+    (setq original-major-mode major-mode)
+    (goto-char start)
+    (setq end-of-header (if (re-search-forward "^$" nil t)
+                           (1+ (match-end 0))
+                         end))
+    (if (> end-of-header end)
+       (setq end-of-header end)
       )
     (save-restriction
-      (narrow-to-region beg end)
-      (setq subj
-           (eword-decode-string
-            (mime-article/get-subject params encoding)))
+      (narrow-to-region start end)
+      (setq subj (eword-decode-string (mime-raw-get-subject entity)))
       )
-    (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-view-header-visible-p rcnum cinfo ctype)
-       (mime-preview/display-header beg he)
-      )
-    (if (and (null rcnum)
-            (member
-             ctype mime-view-content-button-visible-ctype-list))
-       (save-excursion
-         (goto-char (point-max))
-         (mime-view-insert-entity-button
-          rcnum cinfo ctype params subj encoding)
-         ))
-    (cond ((mime-view-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-view-insert-entity-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)
-         )
+    (or situation
+       (setq situation
+             (or (ctree-match-calist mime-preview-condition
+                                     (append (mime-entity-situation entity)
+                                             default-situation))
+                 default-situation)))
+    (let ((button-is-invisible
+          (eq (cdr (assq 'entity-button situation)) 'invisible))
+         (header-is-visible
+          (eq (cdr (assq 'header situation)) 'visible))
+         (body-presentation-method
+          (cdr (assq 'body-presentation-method situation)))
+         (children (mime-entity-children entity)))
+      (set-buffer obuf)
+      (setq nb (point))
+      (narrow-to-region nb nb)
+      (or button-is-invisible
+         (if (mime-view-entity-button-visible-p entity)
+             (mime-view-insert-entity-button entity subj)
+           ))
+      (if header-is-visible
+         (save-restriction
+           (narrow-to-region (point)(point))
+           (insert-buffer-substring raw-buffer start end-of-header)
+           (let ((f (cdr (assq original-major-mode
+                               mime-view-content-header-filter-alist))))
+             (if (functionp f)
+                 (funcall f)
+               (mime-view-default-content-header-filter)
+               ))
+           (run-hooks 'mime-view-content-header-filter-hook)
+           ))
+      (cond ((eq body-presentation-method 'with-filter)
+            (let ((body-filter (cdr (assq 'body-filter situation))))
+              (save-restriction
+                (narrow-to-region (point-max)(point-max))
+                (insert-buffer-substring raw-buffer end-of-header end)
+                (funcall body-filter situation)
+                )))
+           (children)
+           ((functionp body-presentation-method)
+            (funcall body-presentation-method entity situation)
+            )
+           (t
+            (when button-is-invisible
+              (goto-char (point-max))
+              (mime-view-insert-entity-button entity subj)
+              )
+            (or header-is-visible
+                (progn
+                  (goto-char (point-max))
+                  (insert "\n")
+                  ))
+            ))
+      (setq ne (point-max))
+      (widen)
+      (put-text-property nb ne 'mime-view-entity entity)
       (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-view-content-header-filter-alist))))
-      (if (functionp f)
-         (funcall f)
-       (mime-view-default-content-header-filter)
-       ))
-    (run-hooks 'mime-view-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-view-content-filter-alist)
-                     (assq t mime-view-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-view-announcement-for-message/partial)
-      (mime-add-button (point-min)(point-max)
-                      (function mime-view-play-current-entity))
-      )))
-
-(defun mime-article/get-uu-filename (param &optional encoding)
-  (if (member (or encoding
-                 (cdr (assq 'encoding param))
-                 )
-             mime-view-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)
+      (if children
+         (if (functionp body-presentation-method)
+             (funcall body-presentation-method entity situation)
+           (mime-preview-multipart/mixed entity situation)
            ))
-       ))))
-
-(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
@@ -711,15 +913,15 @@ The compressed face will be piped to this command.")
 
 (defconst mime-view-menu-title "MIME-View")
 (defconst mime-view-menu-list
-  '((up                 "Move to upper content"      mime-view-up-content)
-    (previous   "Move to previous content"   mime-view-previous-content)
-    (next       "Move to next content"       mime-view-next-content)
-    (scroll-down "Scroll to previous content" mime-view-scroll-down-content)
-    (scroll-up  "Scroll to next content"     mime-view-scroll-up-content)
-    (play       "Play Content"               mime-view-play-current-entity)
-    (extract    "Extract Content"            mime-view-extract-current-entity)
-    (print      "Print"                      mime-view-print-current-entity)
-    (x-face     "Show X Face"                mime-view-display-x-face)
+  '((up                 "Move to upper entity"    mime-preview-move-to-upper)
+    (previous   "Move to previous entity" mime-preview-move-to-previous)
+    (next       "Move to next entity"     mime-preview-move-to-next)
+    (scroll-down "Scroll-down"             mime-preview-scroll-down-entity)
+    (scroll-up  "Scroll-up"               mime-preview-scroll-up-entity)
+    (play       "Play current entity"     mime-preview-play-current-entity)
+    (extract    "Extract current entity"  mime-preview-extract-current-entity)
+    (print      "Print current entity"    mime-preview-print-current-entity)
+    (x-face     "Show X Face"             mime-preview-display-x-face)
     )
   "Menu for MIME Viewer")
 
@@ -749,49 +951,59 @@ The compressed face will be piped to this command.")
                              (make-sparse-keymap)
                              )))
     (define-key mime-view-mode-map
-      "u"        (function mime-view-up-content))
+      "u"        (function mime-preview-move-to-upper))
     (define-key mime-view-mode-map
-      "p"        (function mime-view-previous-content))
+      "p"        (function mime-preview-move-to-previous))
     (define-key mime-view-mode-map
-      "n"        (function mime-view-next-content))
+      "n"        (function mime-preview-move-to-next))
     (define-key mime-view-mode-map
-      "\e\t"     (function mime-view-previous-content))
+      "\e\t"     (function mime-preview-move-to-previous))
     (define-key mime-view-mode-map
-      "\t"       (function mime-view-next-content))
+      "\t"       (function mime-preview-move-to-next))
     (define-key mime-view-mode-map
-      " "        (function mime-view-scroll-up-content))
+      " "        (function mime-preview-scroll-up-entity))
     (define-key mime-view-mode-map
-      "\M- "     (function mime-view-scroll-down-content))
+      "\M- "     (function mime-preview-scroll-down-entity))
     (define-key mime-view-mode-map
-      "\177"     (function mime-view-scroll-down-content))
+      "\177"     (function mime-preview-scroll-down-entity))
     (define-key mime-view-mode-map
-      "\C-m"     (function mime-view-next-line-content))
+      "\C-m"     (function mime-preview-next-line-entity))
     (define-key mime-view-mode-map
-      "\C-\M-m"  (function mime-view-previous-line-content))
+      "\C-\M-m"  (function mime-preview-previous-line-entity))
     (define-key mime-view-mode-map
-      "v"        (function mime-view-play-current-entity))
+      "v"        (function mime-preview-play-current-entity))
     (define-key mime-view-mode-map
-      "e"        (function mime-view-extract-current-entity))
+      "e"        (function mime-preview-extract-current-entity))
     (define-key mime-view-mode-map
-      "\C-c\C-p" (function mime-view-print-current-entity))
+      "\C-c\C-p" (function mime-preview-print-current-entity))
     (define-key mime-view-mode-map
-      "a"        (function mime-view-follow-content))
+      "a"        (function mime-preview-follow-current-entity))
     (define-key mime-view-mode-map
-      "q"        (function mime-view-quit))
+      "q"        (function mime-preview-quit))
     (define-key mime-view-mode-map
-      "h"        (function mime-view-show-summary))
+      "h"        (function mime-preview-show-summary))
     (define-key mime-view-mode-map
-      "\C-c\C-x" (function mime-view-kill-buffer))
+      "\C-c\C-x" (function mime-preview-kill-buffer))
+    ;; (define-key mime-view-mode-map
+    ;;   "<"        (function beginning-of-buffer))
+    ;; (define-key mime-view-mode-map
+    ;;   ">"        (function end-of-buffer))
     (define-key mime-view-mode-map
-      "<"        (function beginning-of-buffer))
+      "?"        (function describe-mode))
     (define-key mime-view-mode-map
-      ">"        (function end-of-buffer))
+      [tab] (function mime-preview-move-to-next))
     (define-key mime-view-mode-map
-      "?"        (function describe-mode))
+      [delete] (function mime-preview-scroll-down-entity))
+    (define-key mime-view-mode-map
+      [backspace] (function mime-preview-scroll-down-entity))
     (if (functionp default)
-       (setq mime-view-mode-map
-             (append mime-view-mode-map (list (cons t default)))
-             ))
+       (cond (running-xemacs
+              (set-keymap-default-binding mime-view-mode-map default)
+              )
+             (t
+              (setq mime-view-mode-map
+                    (append mime-view-mode-map (list (cons t default))))
+              )))
     (if mouse-button-2
        (define-key mime-view-mode-map
          mouse-button-2 (function mime-button-dispatcher))
@@ -818,7 +1030,75 @@ The compressed face will be piped to this command.")
     (run-hooks 'mime-view-define-keymap-hook)
     ))
 
-(defun mime-view-mode (&optional mother ctl encoding ibuf obuf
+(defsubst mime-maybe-hide-echo-buffer ()
+  "Clear mime-echo buffer and delete window for it."
+  (let ((buf (get-buffer mime-echo-buffer-name)))
+    (if buf
+       (save-excursion
+         (set-buffer buf)
+         (erase-buffer)
+         (let ((win (get-buffer-window buf)))
+           (if win
+               (delete-window win)
+             ))
+         (bury-buffer buf)
+         ))))
+
+(defvar mime-view-redisplay nil)
+
+(defun mime-view-display-message (message &optional preview-buffer
+                                         mother default-keymap-or-function)
+  (mime-maybe-hide-echo-buffer)
+  (let ((win-conf (current-window-configuration))
+       (raw-buffer (mime-entity-buffer message)))
+    (or preview-buffer
+       (setq preview-buffer
+             (concat "*Preview-" (buffer-name raw-buffer) "*")))
+    (set-buffer raw-buffer)
+    (setq mime-raw-message-info (mime-parse-message))
+    (setq mime-preview-buffer preview-buffer)
+    (let ((inhibit-read-only t))
+      (switch-to-buffer preview-buffer)
+      (widen)
+      (erase-buffer)
+      (setq mime-raw-buffer raw-buffer)
+      (if mother
+         (setq mime-mother-buffer mother)
+       )
+      (setq mime-preview-original-window-configuration win-conf)
+      (setq major-mode 'mime-view-mode)
+      (setq mode-name "MIME-View")
+      (mime-view-display-entity message message
+                               preview-buffer
+                               '((entity-button . invisible)
+                                 (header . visible)
+                                 ))
+      (mime-view-define-keymap default-keymap-or-function)
+      (let ((point
+            (next-single-property-change (point-min) 'mime-view-entity)))
+       (if point
+           (goto-char point)
+         (goto-char (point-min))
+         (search-forward "\n\n" nil t)
+         ))
+      (run-hooks 'mime-view-mode-hook)
+      ))
+  (set-buffer-modified-p nil)
+  (setq buffer-read-only t)
+  )
+
+(defun mime-view-buffer (&optional raw-buffer preview-buffer mother
+                                  default-keymap-or-function)
+  (interactive)
+  (mime-view-display-message
+   (save-excursion
+     (if raw-buffer (set-buffer raw-buffer))
+     (mime-parse-message)
+     )
+   preview-buffer mother default-keymap-or-function))
+
+(defun mime-view-mode (&optional mother ctl encoding
+                                raw-buffer preview-buffer
                                 default-keymap-or-function)
   "Major mode for viewing MIME message.
 
@@ -844,364 +1124,351 @@ 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-view-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-view-define-keymap default-keymap-or-function)
-      (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-view-mode-hook)
-      )))
+  (mime-view-display-message
+   (save-excursion
+     (if raw-buffer (set-buffer raw-buffer))
+     (or mime-view-redisplay
+        (mime-parse-message ctl encoding))
+     )
+   preview-buffer mother default-keymap-or-function))
 
-(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))
-       ))))
+;;; @@ playing
+;;;
 
-(autoload 'mime-view-play-current-entity "mime-play" "Play current entity." t)
+(autoload 'mime-preview-play-current-entity "mime-play"
+  "Play current entity." t)
 
-(defun mime-view-extract-current-entity ()
+(defun mime-preview-extract-current-entity ()
   "Extract current entity into file (maybe).
 It decodes current entity to call internal or external method as
 \"extract\" mode.  The method is selected from variable
-`mime/content-decoding-condition'."
+`mime-acting-condition'."
   (interactive)
-  (mime-view-play-current-entity "extract")
+  (mime-preview-play-current-entity "extract")
   )
 
-(defun mime-view-print-current-entity ()
+(defun mime-preview-print-current-entity ()
   "Print current entity (maybe).
 It decodes current entity to call internal or external method as
 \"print\" mode.  The method is selected from variable
-`mime/content-decoding-condition'."
+`mime-acting-condition'."
   (interactive)
-  (mime-view-play-current-entity "print")
+  (mime-preview-play-current-entity "print")
   )
 
-(defun mime-view-follow-content ()
+
+;;; @@ following
+;;;
+
+(defun mime-preview-original-major-mode (&optional recursive)
+  "Return major-mode of original buffer.
+If a current buffer has mime-mother-buffer, return original major-mode
+of the mother-buffer."
+  (if (and recursive mime-mother-buffer)
+      (save-excursion
+       (set-buffer mime-mother-buffer)
+       (mime-preview-original-major-mode recursive)
+       )
+    (save-excursion
+      (set-buffer
+       (mime-entity-buffer
+       (get-text-property (point-min) 'mime-view-entity)))
+      major-mode)))
+
+(defun mime-preview-follow-current-entity ()
+  "Write follow message to current entity.
+It calls following-method selected from variable
+`mime-view-following-method-alist'."
   (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)
-              fields)
-         (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-view-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= (mime::content-info/type ci)
-                                   "message/rfc822")
-                          nil
-                        (if str
-                            (insert str)
+  (let (entity)
+    (while (null (setq entity
+                      (get-text-property (point) 'mime-view-entity)))
+      (backward-char)
+      )
+    (let* ((p-beg
+           (previous-single-property-change (point) 'mime-view-entity))
+          p-end
+          (entity-node-id (mime-entity-node-id entity))
+          (len (length entity-node-id))
+          )
+      (cond ((null p-beg)
+            (setq p-beg
+                  (if (eq (next-single-property-change (point-min)
+                                                       'mime-view-entity)
+                          (point))
+                      (point)
+                    (point-min)))
+            )
+           ((eq (next-single-property-change p-beg 'mime-view-entity)
+                (point))
+            (setq p-beg (point))
+            ))
+      (setq p-end (next-single-property-change p-beg 'mime-view-entity))
+      (cond ((null p-end)
+            (setq p-end (point-max))
+            )
+           ((null entity-node-id)
+            (setq p-end (point-max))
+            )
+           (t
+            (save-excursion
+              (goto-char p-end)
+              (catch 'tag
+                (let (e)
+                  (while (setq e
+                               (next-single-property-change
+                                (point) 'mime-view-entity))
+                    (goto-char e)
+                    (let ((rc (mime-entity-node-id
+                               (get-text-property (point)
+                                                  'mime-view-entity))))
+                      (or (equal entity-node-id
+                                 (nthcdr (- (length rc) len) rc))
+                          (throw 'tag nil)
+                          ))
+                    (setq p-end e)
+                    ))
+                (setq p-end (point-max))
+                ))
+            ))
+      (let* ((mode (mime-preview-original-major-mode 'recursive))
+            (new-name
+             (format "%s-%s" (buffer-name) (reverse entity-node-id)))
+            new-buf
+            (the-buf (current-buffer))
+            (a-buf mime-raw-buffer)
+            fields)
+       (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))
+          (let ((entity-node-id (mime-entity-node-id entity)) ci str)
+           (while (progn
+                    (setq
+                     str
+                     (save-excursion
+                       (set-buffer a-buf)
+                       (setq
+                        ci
+                        (mime-raw-find-entity-from-node-id entity-node-id))
+                       (save-restriction
+                         (narrow-to-region
+                          (mime-entity-point-min ci)
+                          (mime-entity-point-max ci)
                           )
-                        rcnum))
-               (setq fields (std11-collect-field-names)
-                     rcnum (cdr rcnum))
-               )
+                         (std11-header-string-except
+                          (concat "^"
+                                  (apply (function regexp-or) fields)
+                                  ":") ""))))
+                    (if (and
+                         (eq (mime-entity-media-type ci) 'message)
+                         (eq (mime-entity-media-subtype ci) 'rfc822))
+                        nil
+                      (if str
+                          (insert str)
+                        )
+                      entity-node-id))
+             (setq fields (std11-collect-field-names)
+                   entity-node-id (cdr entity-node-id))
              )
-           (let ((rest mime-view-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))
-               ))
-           (eword-decode-header)
            )
-         (let ((f (cdr (assq mode mime-view-following-method-alist))))
-           (if (functionp f)
-               (funcall f new-buf)
-             (message
-              (format
-               "Sorry, following method for %s is not implemented yet."
-               mode))
+         (let ((rest mime-view-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-mother-buffer)
+                               (set-buffer mime-raw-buffer)
+                               (std11-field-body field-name)
+                               )
+                             "\n")))
+                   ))
+             (setq rest (cdr rest))
              ))
-         ))))
+         (eword-decode-header)
+         )
+       (let ((f (cdr (assq mode mime-view-following-method-alist))))
+         (if (functionp f)
+             (funcall f new-buf)
+           (message
+            (format
+             "Sorry, following method for %s is not implemented yet."
+             mode))
+           ))
+       ))))
+
 
-(defun mime-view-display-x-face ()
+;;; @@ X-Face
+;;;
+
+(defun mime-preview-display-x-face ()
   (interactive)
   (save-window-excursion
-    (set-buffer mime::preview/article-buffer)
+    (set-buffer mime-raw-buffer)
     (mime-view-x-face-function)
     ))
 
-(defun mime-view-up-content ()
+
+;;; @@ moving
+;;;
+
+(defun mime-preview-move-to-upper ()
+  "Move to upper entity.
+If there is no upper entity, call function `mime-preview-quit'."
   (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))
+  (let (cinfo)
+    (while (null (setq cinfo
+                      (get-text-property (point) 'mime-view-entity)))
+      (backward-char)
+      )
+    (let ((r (mime-raw-find-entity-from-node-id
+             (cdr (mime-entity-node-id cinfo))
+             (get-text-property 1 'mime-view-entity)))
+         point)
+      (catch 'tag
+       (while (setq point (previous-single-property-change
+                           (point) 'mime-view-entity))
+         (goto-char point)
+         (if (eq r (get-text-property (point) 'mime-view-entity))
+             (throw 'tag t)
            )
-         (goto-char (mime::preview-content-info/point-min cell))
          )
-      (mime-view-quit)
-      )))
+       (mime-preview-quit)
+       ))))
 
-(defun mime-view-previous-content ()
+(defun mime-preview-move-to-previous ()
+  "Move to previous entity.
+If there is no previous entity, it calls function registered in
+variable `mime-view-over-to-previous-method-alist'."
   (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))
+  (while (null (get-text-property (point) 'mime-view-entity))
+    (backward-char)
+    )
+  (let ((point (previous-single-property-change (point) 'mime-view-entity)))
+    (if point
+       (if (get-text-property (1- point) 'mime-view-entity)
+           (goto-char point)
+         (goto-char (1- point))
+         (mime-preview-move-to-previous)
          )
-       (setq i (- i 1))
-       )
-      (let ((f (assq mime::preview/original-major-mode
+      (let ((f (assq (mime-preview-original-major-mode)
                     mime-view-over-to-previous-method-alist)))
        (if f
            (funcall (cdr f))
          ))
-      )
-    ))
+      )))
 
-(defun mime-view-next-content ()
+(defun mime-preview-move-to-next ()
+  "Move to next entity.
+If there is no previous entity, it calls function registered in
+variable `mime-view-over-to-next-method-alist'."
   (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
+  (while (null (get-text-property (point) 'mime-view-entity))
+    (forward-char)
+    )
+  (let ((point (next-single-property-change (point) 'mime-view-entity)))
+    (if point
+       (progn
+         (goto-char point)
+         (if (null (get-text-property point 'mime-view-entity))
+             (mime-preview-move-to-next)
+           ))
+      (let ((f (assq (mime-preview-original-major-mode)
                     mime-view-over-to-next-method-alist)))
        (if f
            (funcall (cdr f))
          ))
-      )
-    ))
+      )))
 
-(defun mime-view-scroll-up-content (&optional h)
+(defun mime-preview-scroll-up-entity (&optional h)
+  "Scroll up current entity.
+If reached to (point-max), it calls function registered in variable
+`mime-view-over-to-next-method-alist'."
   (interactive)
   (or h
-      (setq h (- (window-height) 1))
+      (setq h (1- (window-height)))
       )
   (if (= (point) (point-max))
-      (let ((f (assq mime::preview/original-major-mode
+      (let ((f (assq (mime-preview-original-major-mode)
                      mime-view-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)))
+    (let ((point
+          (or (next-single-property-change (point) 'mime-view-entity)
+              (point-max))))
       (forward-line h)
-      (if (> (point) np)
-          (goto-char np)
+      (if (> (point) point)
+          (goto-char point)
         )
-      ;;(show-subtree)
-      ))
-  )
+      )))
 
-(defun mime-view-scroll-down-content (&optional h)
+(defun mime-preview-scroll-down-entity (&optional h)
+  "Scroll down current entity.
+If reached to (point-min), it calls function registered in variable
+`mime-view-over-to-previous-method-alist'."
   (interactive)
   (or h
-      (setq h (- (window-height) 1))
+      (setq h (1- (window-height)))
       )
   (if (= (point) (point-min))
-      (let ((f (assq mime::preview/original-major-mode
-                     mime-view-over-to-previous-method-alist)))
+      (let ((f (assq (mime-preview-original-major-mode)
+                    mime-view-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)))
+    (let ((point
+          (or (previous-single-property-change (point) 'mime-view-entity)
+              (point-min))))
       (forward-line (- h))
-      (if (< (point) pp)
-          (goto-char pp)
-        )))
-  )
+      (if (< (point) point)
+          (goto-char point)
+        ))))
 
-(defun mime-view-next-line-content ()
+(defun mime-preview-next-line-entity ()
   (interactive)
-  (mime-view-scroll-up-content 1)
+  (mime-preview-scroll-up-entity 1)
   )
 
-(defun mime-view-previous-line-content ()
+(defun mime-preview-previous-line-entity ()
   (interactive)
-  (mime-view-scroll-down-content 1)
+  (mime-preview-scroll-down-entity 1)
   )
 
-(defun mime-view-quit ()
+
+;;; @@ quitting
+;;;
+
+(defun mime-preview-quit ()
+  "Quit from MIME-preview buffer.
+It calls function registered in variable
+`mime-preview-quitting-method-alist'."
   (interactive)
-  (let ((r (save-excursion
-            (set-buffer (mime::preview-content-info/buffer
-                         (mime-preview/point-pcinfo (point))))
-            (assq major-mode mime-view-quitting-method-alist)
-            )))
+  (let ((r (assq (mime-preview-original-major-mode)
+                mime-preview-quitting-method-alist)))
     (if r
        (funcall (cdr r))
       )))
 
-(defun mime-view-show-summary ()
+(defun mime-preview-show-summary ()
+  "Show summary.
+It calls function registered in variable
+`mime-view-show-summary-method'."
   (interactive)
-  (let ((r (save-excursion
-            (set-buffer
-             (mime::preview-content-info/buffer
-              (mime-preview/point-pcinfo (point)))
-             )
-            (assq major-mode mime-view-show-summary-method)
-            )))
+  (let ((r (assq (mime-preview-original-major-mode)
+                mime-view-show-summary-method)))
     (if r
        (funcall (cdr r))
       )))
 
-(defun mime-view-kill-buffer ()
+(defun mime-preview-kill-buffer ()
   (interactive)
   (kill-buffer (current-buffer))
   )