* mime-pgp.el (mime-view-application/pgp): Use epg-signature-to-string.
[elisp/semi.git] / mime-view.el
index a077ae1..33dc314 100644 (file)
 
 ;; 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.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
 
 ;;; Code:
 
-(require 'emu)
 (require 'mime)
 (require 'semi-def)
 (require 'calist)
 (require 'alist)
-(require 'mailcap)
+(require 'mime-conf)
+(require 'mcharset)
+
+(eval-when-compile (require 'static))
 
 
 ;;; @ version
@@ -67,6 +69,17 @@ buttom. Nil means don't scroll at all."
                 (const :tag "On" t)
                 (sexp :tag "Situation" 1)))
 
+(defcustom mime-view-mailcap-files
+  (let ((files '("/etc/mailcap" "/usr/etc/mailcap" "~/.mailcap")))
+    (or (member mime-mailcap-file files)
+       (setq files (cons mime-mailcap-file files)))
+    files)
+  "List of mailcap files."
+  :group 'mime-view
+  :type '(repeat file))
+
+(defvar mime-view-automatic-conversion 'undecided)
+
 
 ;;; @ in raw-buffer (representation space)
 ;;;
@@ -339,10 +352,58 @@ mother-buffer."
 (defvar mime-acting-situation-example-list-max-size 16)
 (defvar mime-situation-examples-file-coding-system nil)
 
+(defun mime-view-read-situation-examples-file (&optional file)
+  (or file
+      (setq file mime-situation-examples-file))
+  (if (and file
+          (file-readable-p file))
+      (with-temp-buffer
+       (insert-file-contents file)
+       (setq mime-situation-examples-file-coding-system
+              (static-cond
+              ((boundp 'buffer-file-coding-system)
+               (symbol-value 'buffer-file-coding-system))
+              ((boundp 'file-coding-system)
+               (symbol-value 'file-coding-system))
+              (t nil))
+             ;; (and (boundp 'buffer-file-coding-system)
+              ;;      buffer-file-coding-system)
+             )
+       (condition-case error
+           (eval-buffer)
+         (error (message "%s is broken: %s" file (cdr error))))
+       ;; format check
+       (condition-case nil
+           (let ((i 0))
+             (while (and (> (length mime-preview-situation-example-list)
+                            mime-preview-situation-example-list-max-size)
+                         (< i 16))
+               (setq mime-preview-situation-example-list
+                     (mime-reduce-situation-examples
+                      mime-preview-situation-example-list))
+               (setq i (1+ i))))
+         (error (setq mime-preview-situation-example-list nil)))
+       ;; (let ((rest mime-preview-situation-example-list))
+       ;;   (while rest
+       ;;     (ctree-set-calist-strictly 'mime-preview-condition
+       ;;                                (caar rest))
+       ;;     (setq rest (cdr rest))))
+       (condition-case nil
+           (let ((i 0))
+             (while (and (> (length mime-acting-situation-example-list)
+                            mime-acting-situation-example-list-max-size)
+                         (< i 16))
+               (setq mime-acting-situation-example-list
+                     (mime-reduce-situation-examples
+                      mime-acting-situation-example-list))
+               (setq i (1+ i))))
+         (error (setq mime-acting-situation-example-list nil))))))
+
 (defun mime-save-situation-examples ()
   (if (or mime-preview-situation-example-list
          mime-acting-situation-example-list)
-      (let ((file mime-situation-examples-file))
+      (let ((file mime-situation-examples-file)
+           print-length print-level)
        (with-temp-buffer
          (insert ";;; " (file-name-nondirectory file) "\n")
          (insert "\n;; This file is generated automatically by "
@@ -366,6 +427,8 @@ mother-buffer."
           ((boundp 'file-coding-system)
            (setq file-coding-system
                  mime-situation-examples-file-coding-system)))
+         ;; (setq buffer-file-coding-system
+         ;;       mime-situation-examples-file-coding-system)
          (setq buffer-file-name file)
          (save-buffer)))))
 
@@ -616,6 +679,9 @@ Each elements are regexp of field-name.")
 
 (autoload 'fill-flowed "flow-fill")
 
+(defvar mime-preview-inline-fontify t
+  "If non-nil, fontify the inline part.")
+
 (ctree-set-calist-strictly
  'mime-preview-condition
  '((type . nil)
@@ -644,6 +710,12 @@ Each elements are regexp of field-name.")
 
 (ctree-set-calist-strictly
  'mime-preview-condition
+ '((type . application)(subtype . emacs-lisp)
+   (body . visible)
+   (body-presentation-method . mime-display-application/emacs-lisp)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition
  '((type . text)(subtype . t)
    (body . visible)
    (body-presentation-method . mime-display-text/plain)))
@@ -656,6 +728,12 @@ Each elements are regexp of field-name.")
 
 (ctree-set-calist-strictly
  'mime-preview-condition
+ '((type . multipart)(subtype . related)
+   (body . visible)
+   (body-presentation-method . mime-display-multipart/related)))
+
+(ctree-set-calist-strictly
+ 'mime-preview-condition
  '((type . multipart)(subtype . t)
    (body . visible)
    (body-presentation-method . mime-display-multipart/mixed)))
@@ -690,7 +768,10 @@ Each elements are regexp of field-name.")
   (save-restriction
     (narrow-to-region (point-max)(point-max))
     (condition-case nil
-       (mime-insert-text-content entity)
+       (if (and mime-preview-inline-fontify
+                (mime-entity-filename entity)) ;should be an attachment.
+           (mime-view-insert-fontified-text-content entity situation)
+         (mime-view-insert-text-content entity situation))
       (error (progn
               (message "Can't decode current entity.")
               (sit-for 1))))
@@ -707,7 +788,7 @@ Each elements are regexp of field-name.")
 (defun mime-display-text/richtext (entity situation)
   (save-restriction
     (narrow-to-region (point-max)(point-max))
-    (mime-insert-text-content entity)
+    (mime-view-insert-text-content entity situation)
     (run-hooks 'mime-text-decode-hook)
     (let ((beg (point-min)))
       (remove-text-properties beg (point-max) '(face nil))
@@ -716,21 +797,14 @@ Each elements are regexp of field-name.")
 (defun mime-display-text/enriched (entity situation)
   (save-restriction
     (narrow-to-region (point-max)(point-max))
-    (mime-insert-text-content entity)
+    (mime-view-insert-text-content entity situation)
     (run-hooks 'mime-text-decode-hook)
     (let ((beg (point-min)))
       (remove-text-properties beg (point-max) '(face nil))
       (enriched-decode beg (point-max)))))
 
 (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.         ]]"))
+  "This is message/partial style split message.")
 
 (defun mime-display-message/partial-button (&optional entity situation)
   (save-restriction
@@ -738,10 +812,8 @@ Each elements are regexp of field-name.")
     (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)))
+    (mime-insert-button mime-view-announcement-for-message/partial
+                       #'mime-preview-play-current-entity)))
 
 (defun mime-display-multipart/mixed (entity situation)
   (let ((children (mime-entity-children entity))
@@ -821,6 +893,124 @@ MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
            situations (cdr situations)
            i (1+ i)))))
 
+(defun mime-display-multipart/related (entity situation)
+  (let* ((param-start (mime-parse-msg-id
+                      (std11-lexical-analyze
+                       (cdr (assoc "start"
+                                   (mime-content-type-parameters
+                                    (mime-entity-content-type entity)))))))
+        (start (or (and param-start (mime-find-entity-from-content-id
+                                     param-start
+                                     entity))
+                   (car (mime-entity-children entity))))
+        (original-major-mode-cell (assq 'major-mode situation))
+        (default-situation (cdr (assq 'childrens-situation situation))))
+    (when start
+      (if original-major-mode-cell
+         (setq default-situation
+               (cons original-major-mode-cell default-situation)))
+      (mime-display-entity start nil default-situation))))
+
+(defun mime-view-entity-content (entity situation)
+  (mime-decode-string
+   (mime-entity-body entity)
+   (mime-view-guess-encoding entity situation)))
+  
+(defun mime-view-insert-text-content (entity situation)
+  (let (compression-info)
+    (cond
+     ((and (mime-entity-filename entity)
+          (featurep 'jka-compr)
+          (jka-compr-installed-p)
+          (setq compression-info (jka-compr-get-compression-info
+                                  (mime-entity-filename entity))))
+      (insert
+       (mime-view-filter-text-content
+       (mime-view-entity-content entity situation)
+       (jka-compr-info-uncompress-program compression-info)
+       (jka-compr-info-uncompress-args compression-info))))
+     ((or (assq '*encoding situation)  ;should be specified by user
+         (assq '*charset situation))   ;should be specified by user
+      (insert
+       (decode-mime-charset-string
+       (mime-view-entity-content entity situation)
+       (mime-view-guess-charset entity situation)
+       'CRLF)))
+     (t
+      (mime-insert-text-content entity)))))
+
+;;; stolen (and renamed) from `mime-display-gzipped' of EMY 1.13.
+(defun mime-view-filter-text-content (content program args)
+  (with-temp-buffer
+    (static-cond
+     ((featurep 'xemacs)
+      (insert content)
+      (apply #'binary-to-text-funcall
+            mime-view-automatic-conversion
+            #'call-process-region (point-min)(point-max)
+            program t t args))
+     (t
+      (if (not (multibyte-string-p content))
+         (set-buffer-multibyte nil))
+      (insert content)
+      (apply #'binary-funcall
+            #'call-process-region (point-min)(point-max)
+            program t t args)
+      (set-buffer-multibyte t)
+      (decode-coding-region (point-min)(point-max)
+                           mime-view-automatic-conversion)))
+    (buffer-string)))
+
+;;; stolen (and renamed) from mm-view.el.
+(defun mime-view-insert-fontified-text-content (entity situation
+                                                      &optional mode)
+  ;; XEmacs @#$@ version of font-lock refuses to fully turn itself
+  ;; on for buffers whose name begins with " ".  That's why we use
+  ;; save-current-buffer/get-buffer-create rather than
+  ;; with-temp-buffer.
+  (let ((buffer (generate-new-buffer "*fontification*"))
+       filename)
+    (unwind-protect
+       (progn
+         (save-current-buffer
+           (set-buffer buffer)
+           (buffer-disable-undo)
+           (kill-all-local-variables)
+           (mime-view-insert-text-content entity situation)
+           (require 'font-lock)
+           (let ((font-lock-maximum-size nil)
+                 ;; Disable support modes, e.g., jit-lock, lazy-lock, etc.
+                 (font-lock-mode-hook nil)
+                 (font-lock-support-mode nil)
+                 ;; I find font-lock a bit too verbose.
+                 (font-lock-verbose nil))
+             (cond (mode
+                    (funcall mode))
+                   ((setq filename (mime-entity-filename entity))
+                    (let ((buffer-file-name
+                           (expand-file-name (file-name-nondirectory filename)
+                                             temporary-file-directory)))
+                      (set-auto-mode))))
+             ;; The mode function might have already turned on font-lock.
+             (unless (symbol-value 'font-lock-mode)
+               (font-lock-fontify-buffer)))
+           ;; By default, XEmacs font-lock uses non-duplicable text
+           ;; properties.  This code forces all the text properties
+           ;; to be copied along with the text.
+           (static-when (fboundp 'extent-list)
+             (map-extents (lambda (ext ignored)
+                            (set-extent-property ext 'duplicable t)
+                            nil)
+                          nil nil nil nil nil 'text-prop)))
+         (insert-buffer-substring buffer))
+      (kill-buffer buffer))))
+
+(defun mime-display-application/emacs-lisp (entity situation)
+  (save-restriction
+    (narrow-to-region (point-max)(point-max))
+    (mime-view-insert-fontified-text-content entity situation 'emacs-lisp-mode)
+    (run-hooks 'mime-text-decode-hook 'mime-display-text/plain-hook)))
+
 
 ;;; @ acting-condition
 ;;;
@@ -828,29 +1018,39 @@ MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
 (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)))))
+(defun mime-view-read-mailcap-files (&optional files)
+  (or files
+      (setq files mime-view-mailcap-files))
+  (let (entries file)
+    (while files
+      (setq file (car files))
+      (if (file-readable-p file)
+         (setq entries (append entries (mime-parse-mailcap-file file))))
+      (setq files (cdr files)))
+    (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)))))
+
+(mime-view-read-mailcap-files)
 
 (ctree-set-calist-strictly
  'mime-acting-condition
@@ -1029,7 +1229,7 @@ MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
   (when (boundp 'widget-keymap)
     (set-keymap-parent (current-local-map) widget-keymap)))
 
-(add-hook 'mime-view-define-keymap-hook 'mime-view-maybe-inherit-widget-keymap)
+(add-hook 'mime-view-mode-hook 'mime-view-maybe-inherit-widget-keymap)
          
 (defun mime-view-define-keymap (&optional default)
   (let ((mime-view-mode-map (if (keymapp default)
@@ -1102,14 +1302,17 @@ MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
     (define-key mime-view-mode-map
       [backspace] (function mime-preview-scroll-down-entity))
     (if (functionp default)
-       (static-if (featurep 'xemacs)
+       (if (featurep 'xemacs)
            (set-keymap-default-binding mime-view-mode-map default)
          (setq mime-view-mode-map
                (append mime-view-mode-map (list (cons t default))))))
     (define-key mime-view-mode-map
-      mouse-button-3 (function mime-view-popup-menu))
-    (use-local-map mime-view-mode-map)
-    (run-hooks 'mime-view-define-keymap-hook)))
+      [down-mouse-3] (function mime-view-popup-menu))
+    ;; (run-hooks 'mime-view-define-keymap-hook)
+    mime-view-mode-map))
+
+(defvar mime-view-mode-default-map (mime-view-define-keymap))
+
 
 (defsubst mime-maybe-hide-echo-buffer ()
   "Clear mime-echo buffer and delete window for it."
@@ -1128,7 +1331,7 @@ MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
 ;;;###autoload
 (defun mime-display-message (message &optional preview-buffer
                                     mother default-keymap-or-function
-                                    original-major-mode)
+                                    original-major-mode keymap)
   "View MESSAGE in MIME-View mode.
 
 Optional argument PREVIEW-BUFFER specifies the buffer of the
@@ -1139,7 +1342,14 @@ Optional argument MOTHER specifies mother-buffer of the preview-buffer.
 Optional argument DEFAULT-KEYMAP-OR-FUNCTION is nil, keymap or
 function.  If it is a keymap, keymap of MIME-View mode will be added
 to it.  If it is a function, it will be bound as default binding of
-keymap of MIME-View mode."
+keymap of MIME-View mode.
+
+Optional argument ORIGINAL-MAJOR-MODE is major-mode of representation
+buffer of MESSAGE.  If it is nil, current `major-mode' is used.
+
+Optional argument KEYMAP is keymap of MIME-View mode.  If it is
+non-nil, DEFAULT-KEYMAP-OR-FUNCTION is ignored.  If it is nil,
+`mime-view-mode-default-map' is used."
   (mime-maybe-hide-echo-buffer)
   (let ((win-conf (current-window-configuration)))
     (or preview-buffer
@@ -1161,7 +1371,11 @@ keymap of MIME-View mode."
                             (header . visible)
                             (major-mode . ,original-major-mode))
                           preview-buffer)
-      (mime-view-define-keymap default-keymap-or-function)
+      (use-local-map
+       (or keymap
+          (if default-keymap-or-function
+              (mime-view-define-keymap default-keymap-or-function)
+            mime-view-mode-default-map)))
       (let ((point
             (next-single-property-change (point-min) 'mime-view-entity)))
        (if point
@@ -1257,15 +1471,19 @@ button-2        Move to point under the mouse cursor
 ;;; @@ utility
 ;;;
 
-(defun mime-preview-find-boundary-info (&optional get-mother)
+(defun mime-preview-find-boundary-info (&optional with-children)
+  "Return boundary information of current part.
+If WITH-CHILDREN, refer boundary surrounding current part and its branches."
   (let (entity
        p-beg p-end
        entity-node-id len)
-    (while (null (setq entity
-                      (get-text-property (point) 'mime-view-entity)))
+    (while (and
+           (null (setq entity
+                       (get-text-property (point) 'mime-view-entity)))
+           (> (point) (point-min)))
       (backward-char))
     (setq p-beg (previous-single-property-change (point) 'mime-view-entity))
-    (setq entity-node-id (mime-entity-node-id entity))
+    (setq entity-node-id (and entity (mime-entity-node-id entity)))
     (setq len (length entity-node-id))
     (cond ((null p-beg)
           (setq p-beg
@@ -1282,9 +1500,8 @@ button-2  Move to point under the mouse cursor
           (setq p-end (point-max)))
          ((null entity-node-id)
           (setq p-end (point-max)))
-         (get-mother
+         (with-children
           (save-excursion
-            (goto-char p-end)
             (catch 'tag
               (let (e i)
                 (while (setq e
@@ -1292,12 +1509,14 @@ button-2        Move to point under the mouse cursor
                               (point) 'mime-view-entity))
                   (goto-char e)
                   (let ((rc (mime-entity-node-id
-                             (get-text-property (1- (point))
+                             (get-text-property (point)
                                                 'mime-view-entity))))
                     (or (and (>= (setq i (- (length rc) len)) 0)
                              (equal entity-node-id (nthcdr i rc)))
                         (throw 'tag nil)))
-                  (setq p-end e)))
+                  (setq p-end (or (next-single-property-change
+                                   (point) 'mime-view-entity)
+                                  (point-max)))))
               (setq p-end (point-max))))))
     (vector p-beg p-end entity)))
 
@@ -1333,13 +1552,13 @@ It decodes current entity to call internal or external method as
 It calls following-method selected from variable
 `mime-preview-following-method-alist'."
   (interactive)
-  (let ((entity (mime-preview-find-boundary-info t))
-       p-beg p-end
-       pb-beg)
-    (setq p-beg (aref entity 0)
-         p-end (aref entity 1)
-         entity (aref entity 2))
-    (if (get-text-property p-beg 'mime-view-entity-body)
+  (let* ((boundary-info (mime-preview-find-boundary-info t))
+        (p-beg (aref boundary-info 0))
+        (p-end (aref boundary-info 1))
+        (entity (aref boundary-info 2))
+        pb-beg)
+    (if (or (get-text-property p-beg 'mime-view-entity-body)
+           (null entity))
        (setq pb-beg p-beg)
       (setq pb-beg
            (next-single-property-change
@@ -1347,7 +1566,7 @@ It calls following-method selected from variable
             (or (next-single-property-change p-beg 'mime-view-entity)
                 p-end))))
     (let* ((mode (mime-preview-original-major-mode 'recursive))
-          (entity-node-id (mime-entity-node-id entity))
+          (entity-node-id (and entity (mime-entity-node-id entity)))
           (new-name
            (format "%s-%s" (buffer-name) (reverse entity-node-id)))
           new-buf
@@ -1360,7 +1579,8 @@ It calls following-method selected from variable
        (insert-buffer-substring the-buf pb-beg p-end)
        (goto-char (point-min))
        (let ((current-entity
-              (if (and (eq (mime-entity-media-type entity) 'message)
+              (if (and entity
+                       (eq (mime-entity-media-type entity) 'message)
                        (eq (mime-entity-media-subtype entity) 'rfc822))
                   (car (mime-entity-children entity))
                 entity)))
@@ -1397,9 +1617,8 @@ It calls following-method selected from variable
        (if (functionp f)
            (funcall f new-buf)
          (message
-          (format
-           "Sorry, following method for %s is not implemented yet."
-           mode)))))))
+          "Sorry, following method for %s is not implemented yet."
+           mode))))))
 
 
 ;;; @@ moving
@@ -1555,10 +1774,55 @@ If LINES is negative, scroll up LINES lines."
 ;;; @@ display
 ;;;
 
+(defun mime-view-guess-encoding (entity situation)
+  (or (cdr (assq '*encoding situation))
+      (cdr (assq 'encoding situation))
+      (mime-entity-encoding entity)
+      "7bit"))
+
+(defun mime-view-read-encoding (entity situation)
+  (let* ((default-encoding
+          (mime-view-guess-encoding entity situation))
+        (encoding
+         (completing-read
+          "Content Transfer Encoding: "
+          (mime-encoding-alist) nil t default-encoding)))
+    (unless (or (string= encoding "")
+               (string= encoding default-encoding))
+      encoding)))
+
+(defun mime-view-guess-charset (entity situation)
+  (or (static-if (fboundp 'coding-system-to-mime-charset)
+         ;; might be overridden by `universal-coding-system-argument'.
+         (and coding-system-for-read
+              (coding-system-to-mime-charset coding-system-for-read)))
+      (cdr (assq '*charset situation))
+      (cdr (assq 'charset situation))
+      (let ((charset (cdr (assoc "charset" (mime-entity-parameters entity)))))
+       (if charset
+           (intern (downcase charset))))
+      default-mime-charset))
+
+(defun mime-view-read-charset (entity situation)
+  (static-if (featurep 'mule)
+      (let* ((default-charset
+              (mime-view-guess-charset entity situation))
+            (charset
+             (intern (completing-read "MIME-charset: "
+                                      (mapcar
+                                       (lambda (sym)
+                                         (list (symbol-name sym)))
+                                       (mime-charset-list))
+                                      nil t
+                                      (symbol-name default-charset)))))
+       (unless (eq charset default-charset)
+         charset))
+    default-charset))
+
 (defun mime-preview-toggle-display (type &optional display)
-  (let ((situation (mime-preview-find-boundary-info))
+  (let ((situation (mime-preview-find-boundary-info t))
        (sym (intern (concat "*" (symbol-name type))))
-       entity p-beg p-end)
+       entity p-beg p-end encoding charset)
     (setq p-beg (aref situation 0)
          p-end (aref situation 1)
          entity (aref situation 2)
@@ -1568,13 +1832,19 @@ If LINES is negative, scroll up LINES lines."
          (display)
          (t
           (setq display
-                (eq (cdr (or (assq sym situation)
-                             (assq type situation)))
-                    'invisible))))
+                (memq (cdr (or (assq sym situation)
+                               (assq type situation)))
+                      '(nil invisible)))))
     (setq situation (put-alist sym (if display
                                       'visible
                                     'invisible)
                               situation))
+    (when (and current-prefix-arg
+              (eq (cdr (assq sym situation)) 'visible))
+      (if (setq encoding (mime-view-read-encoding entity situation))
+         (setq situation (put-alist '*encoding encoding situation)))
+      (if (setq charset (mime-view-read-charset entity situation))
+         (setq situation (put-alist '*charset charset situation))))
     (save-excursion
       (let ((inhibit-read-only t))
        (delete-region p-beg p-end)
@@ -1633,43 +1903,11 @@ It calls function registered in variable
 
 (provide 'mime-view)
 
-(let ((file mime-situation-examples-file))
-  (if (file-readable-p file)
-      (with-temp-buffer
-       (insert-file-contents file)
-       (setq mime-situation-examples-file-coding-system
-             (static-cond
-              ((boundp 'buffer-file-coding-system)
-               (symbol-value 'buffer-file-coding-system))
-              ((boundp 'file-coding-system)
-               (symbol-value 'file-coding-system))
-              (t nil)))
-       (eval-buffer)
-       ;; format check
-       (condition-case nil
-           (let ((i 0))
-             (while (and (> (length mime-preview-situation-example-list)
-                            mime-preview-situation-example-list-max-size)
-                         (< i 16))
-               (setq mime-preview-situation-example-list
-                     (mime-reduce-situation-examples
-                      mime-preview-situation-example-list))
-               (setq i (1+ i))))
-         (error (setq mime-preview-situation-example-list nil)))
-       ;; (let ((rest mime-preview-situation-example-list))
-       ;;   (while rest
-       ;;     (ctree-set-calist-strictly 'mime-preview-condition
-       ;;                                (caar rest))
-       ;;     (setq rest (cdr rest))))
-       (condition-case nil
-           (let ((i 0))
-             (while (and (> (length mime-acting-situation-example-list)
-                            mime-acting-situation-example-list-max-size)
-                         (< i 16))
-               (setq mime-acting-situation-example-list
-                     (mime-reduce-situation-examples
-                      mime-acting-situation-example-list))
-               (setq i (1+ i))))
-         (error (setq mime-acting-situation-example-list nil))))))
+(eval-when-compile
+  (setq mime-situation-examples-file nil)
+  ;; to avoid to read situation-examples-file at compile time.
+  )
+
+(mime-view-read-situation-examples-file)
 
 ;;; mime-view.el ends here