* wl-vars.el (wl-message-use-header-narrowing): New user option.
[elisp/wanderlust.git] / wl / wl-summary.el
index ac32be5..476b6f7 100644 (file)
@@ -60,7 +60,7 @@
 (defvar dragdrop-drop-functions)
 (defvar scrollbar-height)
 (defvar mail-reply-buffer)
-(defvar elmo-global-flag-list)
+(defvar elmo-global-flags)
 
 (defvar wl-summary-buffer-name "Summary")
 (defvar wl-summary-mode-map nil)
@@ -91,7 +91,7 @@
 (defvar wl-summary-buffer-temp-mark-column nil)
 (defvar wl-summary-buffer-persistent-mark-column nil)
 
-(defvar wl-summary-buffer-unsync-mark-number-list nil)
+(defvar wl-summary-buffer-persistent-mark-version 0)
 
 (defvar wl-summary-buffer-persistent nil)
 (defvar wl-summary-buffer-thread-nodes nil)
 (defvar wl-summary-buffer-line-format nil)
 (defvar wl-summary-buffer-mode-line-formatter nil)
 (defvar wl-summary-buffer-mode-line nil)
+(defvar wl-summary-buffer-display-mime-mode 'mime)
+(defvar wl-summary-buffer-display-header-mode 'partial)
 
 (defvar wl-thread-indent-level-internal nil)
 (defvar wl-thread-have-younger-brother-str-internal nil)
 (make-variable-buffer-local 'wl-summary-buffer-number-column)
 (make-variable-buffer-local 'wl-summary-buffer-temp-mark-column)
 (make-variable-buffer-local 'wl-summary-buffer-persistent-mark-column)
-(make-variable-buffer-local 'wl-summary-buffer-unsync-mark-number-list)
+(make-variable-buffer-local 'wl-summary-buffer-persistent-mark-version)
 (make-variable-buffer-local 'wl-summary-buffer-persistent)
 (make-variable-buffer-local 'wl-summary-buffer-thread-nodes)
 (make-variable-buffer-local 'wl-summary-buffer-prev-refile-destination)
 (make-variable-buffer-local 'wl-summary-buffer-line-format)
 (make-variable-buffer-local 'wl-summary-buffer-mode-line-formatter)
 (make-variable-buffer-local 'wl-summary-buffer-mode-line)
+(make-variable-buffer-local 'wl-summary-buffer-display-mime-mode)
+(make-variable-buffer-local 'wl-summary-buffer-display-header-mode)
 
 (defvar wl-datevec)
 (defvar wl-thr-indent-string)
@@ -392,6 +396,11 @@ See also variable `wl-use-petname'."
     ()
   (setq wl-summary-mode-map (make-keymap))
   (suppress-keymap wl-summary-mode-map)
+  (substitute-key-definition 'kill-buffer
+                            'wl-summary-mimic-kill-buffer
+                            wl-summary-mode-map
+                            global-map)
+  ;; basic commands
   (define-key wl-summary-mode-map " "    'wl-summary-read)
   (define-key wl-summary-mode-map "."    'wl-summary-redisplay)
   (define-key wl-summary-mode-map "<"    'wl-summary-display-top)
@@ -417,6 +426,7 @@ See also variable `wl-use-petname'."
   (define-key wl-summary-mode-map "f"    'wl-summary-forward)
   (define-key wl-summary-mode-map "$"    'wl-summary-mark-as-important)
   (define-key wl-summary-mode-map "F"    'wl-summary-set-flags)
+  (define-key wl-summary-mode-map "\M-k"  'wl-summary-toggle-persistent-mark)
   (define-key wl-summary-mode-map "&"    'wl-summary-mark-as-answered)
   (define-key wl-summary-mode-map "@"    'wl-summary-edit-addresses)
 
@@ -432,8 +442,8 @@ See also variable `wl-use-petname'."
   (define-key wl-summary-mode-map "\C-c\C-a" 'wl-addrmgr)
   (define-key wl-summary-mode-map "\C-c\C-p" 'wl-summary-previous-buffer)
   (define-key wl-summary-mode-map "\C-c\C-n" 'wl-summary-next-buffer)
-  (define-key wl-summary-mode-map "H"    'wl-summary-redisplay-all-header)
-  (define-key wl-summary-mode-map "M"    'wl-summary-redisplay-no-mime)
+  (define-key wl-summary-mode-map "H"    'wl-summary-toggle-all-header)
+  (define-key wl-summary-mode-map "M"    'wl-summary-toggle-mime)
   (define-key wl-summary-mode-map "B"    'wl-summary-burst)
   (define-key wl-summary-mode-map "Z"    'wl-status-update)
   (define-key wl-summary-mode-map "#"    'wl-summary-print-message)
@@ -573,6 +583,15 @@ See also variable `wl-use-petname'."
    "Menu used in Summary mode."
    wl-summary-mode-menu-spec))
 
+(defun wl-summary-mimic-kill-buffer (buffer)
+  "Kill the current (Summary) buffer with query."
+  (interactive "bKill buffer: ")
+  (if (or (not buffer)
+         (string-equal buffer "")
+         (string-equal buffer (buffer-name)))
+      (wl-summary-exit 'force-exit)
+    (kill-buffer buffer)))
+
 (defsubst wl-summary-message-visible-p (number)
   "Return non-nil if the message with NUMBER is visible."
   (or (eq wl-summary-buffer-view 'sequence)
@@ -591,10 +610,12 @@ See also variable `wl-use-petname'."
        (save-excursion
          (goto-char beg)
          (while (and (< (point) end) (not (eobp)))
-           (when (null (get-text-property (point) 'face))
-             (setq number (wl-summary-message-number)
-                   flags (elmo-message-flags wl-summary-buffer-elmo-folder
-                                             number))
+           (when (or (null (get-text-property (point) 'face))
+                     (wl-summary-persistent-mark-invalid-p))
+             (setq number (wl-summary-message-number))
+             (when number
+               (setq flags (elmo-message-flags wl-summary-buffer-elmo-folder
+                                               number)))
              (let (wl-summary-highlight)
                (wl-summary-update-persistent-mark number flags))
              (wl-highlight-summary-current-line number flags))
@@ -612,6 +633,71 @@ See also variable `wl-use-petname'."
        (wl-summary-lazy-update-mark
         (list 'wl-summary-update-mark-window))))
 
+(defun wl-summary-after-resize-function (frame)
+  "Called from `window-size-change-functions'."
+  (save-excursion
+    (save-selected-window
+      (select-frame frame)
+      (walk-windows
+       (lambda (window)
+        (set-buffer (window-buffer window))
+        (when (eq major-mode 'wl-summary-mode)
+          (run-hook-with-args 'wl-summary-buffer-window-scroll-functions
+                              window)))
+       'nomini frame))))
+
+;; Handler of event from elmo-folder
+(defun wl-summary-update-persistent-mark-on-event (buffer numbers)
+  (save-excursion
+    (set-buffer buffer)
+    (if wl-summary-lazy-update-mark
+       (let ((window-list (get-buffer-window-list (current-buffer) 'nomini t))
+             invalidate)
+         (dolist (number numbers)
+           (when (wl-summary-message-visible-p number)
+             (if (catch 'visible
+                   (let ((window-list window-list)
+                         win)
+                     (while (setq win (car window-list))
+                       (when (wl-summary-jump-to-msg number
+                                                     (window-start win)
+                                                     (window-end win))
+                         (throw 'visible t))
+                       (setq window-list (cdr window-list)))))
+                 (wl-summary-update-persistent-mark number)
+               (setq invalidate t))))
+         (when invalidate
+           (wl-summary-invalidate-persistent-mark)
+           (dolist (win window-list)
+             (wl-summary-validate-persistent-mark
+              (window-start win)
+              (window-end win)))))
+      (dolist (number numbers)
+       (when (and (wl-summary-message-visible-p number)
+                  (wl-summary-jump-to-msg number))
+         (wl-summary-update-persistent-mark number))))))
+
+(defun wl-summary-buffer-attach ()
+  (when wl-summary-buffer-elmo-folder
+    (elmo-connect-signal
+     wl-summary-buffer-elmo-folder
+     'flag-changed
+     (current-buffer)
+     (elmo-define-signal-handler (buffer folder numbers)
+       (wl-summary-update-persistent-mark-on-event buffer numbers)))
+    (elmo-connect-signal
+     wl-summary-buffer-elmo-folder
+     'cache-changed
+     (current-buffer)
+     (elmo-define-signal-handler (buffer folder number)
+       (wl-summary-update-persistent-mark-on-event buffer (list number))))))
+
+(defun wl-summary-buffer-detach ()
+  (when (and (eq major-mode 'wl-summary-mode)
+            wl-summary-buffer-elmo-folder)
+    (elmo-disconnect-signal 'flag-changed (current-buffer))
+    (elmo-disconnect-signal 'cache-changed (current-buffer))))
+
 (defun wl-status-update ()
   (interactive)
   (wl-address-init))
@@ -648,21 +734,18 @@ If optional USE-CACHE is non-nil, use cache if exists."
        (folder wl-summary-buffer-elmo-folder))
     (if (null number)
        (message "No message.")
-      (elmo-set-work-buf
-       (elmo-message-fetch folder
-                          number
-                          (elmo-make-fetch-strategy
-                           'entire
-                           use-cache ; use cache
-                           nil ; save cache (should `t'?)
-                           (and
-                            use-cache
-                            (elmo-file-cache-get-path
-                             (elmo-message-field folder number 'message-id))))
-                          nil
-                          (current-buffer)
-                          'unread)
-       (buffer-string)))))
+      (elmo-message-fetch-string folder
+                                number
+                                (elmo-make-fetch-strategy
+                                 'entire
+                                 use-cache ; use cache
+                                 nil ; save cache (should `t'?)
+                                 (and
+                                  use-cache
+                                  (elmo-file-cache-get-path
+                                   (elmo-message-field folder number
+                                                       'message-id))))
+                                'unread))))
 
 (defun wl-summary-reedit (&optional arg)
   "Re-edit current message.
@@ -670,7 +753,7 @@ If ARG is non-nil, Supersedes message"
   (interactive "P")
   (wl-summary-toggle-disp-msg 'off)
   (cond
-   ((not (wl-summary-message-number))
+   ((null (wl-summary-message-number))
     (message "No message."))
    (arg
     (wl-summary-supersedes-message))
@@ -680,7 +763,7 @@ If ARG is non-nil, Supersedes message"
        (mail-position-on-field "Newsgroups")
       (mail-position-on-field "To")))
    (t
-    (wl-draft-edit-string (wl-summary-message-string)))))
+    (wl-draft-edit-string (wl-summary-message-string 'maybe)))))
 
 (defun wl-summary-resend-bounced-mail ()
   "Re-mail the current message.
@@ -759,6 +842,7 @@ you."
          wl-summary-buffer-persistent-mark-column persistent)))
 
 (defun wl-summary-buffer-set-folder (folder)
+  (wl-summary-buffer-detach)
   (if (stringp folder)
       (setq folder (wl-folder-get-elmo-folder folder)))
   (setq wl-summary-buffer-elmo-folder folder)
@@ -795,6 +879,7 @@ you."
   (setq wl-summary-buffer-persistent
        (wl-folder-persistent-p (elmo-folder-name-internal folder)))
   (elmo-folder-set-persistent-internal folder wl-summary-buffer-persistent)
+  (wl-summary-buffer-attach)
   ;; process duplicates.
   (elmo-folder-set-process-duplicates-internal
    folder (cdr (elmo-string-matched-assoc
@@ -837,6 +922,8 @@ Entering Folder mode calls the value of `wl-summary-mode-hook'."
 ;;;(setq default-directory (or wl-tmp-dir (expand-file-name "~/")))
   (setq buffer-read-only t)
   (setq truncate-lines t)
+  (when (boundp 'show-trailing-whitespace)
+    (setq show-trailing-whitespace nil))
 ;;;(make-local-variable 'tab-width)
 ;;;(setq tab-width 1)
   (buffer-disable-undo (current-buffer))
@@ -850,7 +937,12 @@ Entering Folder mode calls the value of `wl-summary-mode-hook'."
     (let ((hook (if wl-on-xemacs 'pre-idle-hook 'window-scroll-functions)))
       (make-local-hook hook)
       (dolist (function wl-summary-buffer-window-scroll-functions)
-       (add-hook hook function nil t))))
+       (add-hook hook function nil t)))
+    (add-hook 'window-size-change-functions
+             #'wl-summary-after-resize-function))
+  (dolist (hook '(change-major-mode-hook kill-buffer-hook))
+    (make-local-hook hook)
+    (add-hook hook #'wl-summary-buffer-detach nil t))
   ;; This hook may contain the function `wl-setup-summary' for reasons
   ;; of system internal to accord facilities for the Emacs variants.
   (run-hooks 'wl-summary-mode-hook))
@@ -881,12 +973,10 @@ Entering Folder mode calls the value of `wl-summary-mode-hook'."
 (defun wl-summary-overview-entity-compare-by-from (x y)
   "Compare entity X and Y by from."
   (string<
-   (wl-address-header-extract-address
-    (or (elmo-message-entity-field x 'from t)
-       wl-summary-no-from-message))
-   (wl-address-header-extract-address
-    (or (elmo-message-entity-field y 'from t)
-       wl-summary-no-from-message))))
+   (or (elmo-message-entity-field x 'from t)
+       wl-summary-no-from-message)
+   (or (elmo-message-entity-field y 'from t)
+       wl-summary-no-from-message)))
 
 (defun wl-summary-overview-entity-compare-by-subject (x y)
   "Compare entity X and Y by subject."
@@ -940,26 +1030,32 @@ Entering Folder mode calls the value of `wl-summary-mode-hook'."
       (string< (or (car list-info-x) "")
               (or (car list-info-y) "")))))
 
-(defun wl-summary-sort-by-date ()
-  (interactive)
-  (wl-summary-rescan "date"))
-(defun wl-summary-sort-by-number ()
-  (interactive)
-  (wl-summary-rescan "number"))
-(defun wl-summary-sort-by-subject ()
-  (interactive)
-  (wl-summary-rescan "subject"))
-(defun wl-summary-sort-by-from ()
-  (interactive)
-  (wl-summary-rescan "from"))
-(defun wl-summary-sort-by-list-info ()
-  (interactive)
-  (wl-summary-rescan "list-info"))
-(defun wl-summary-sort-by-size ()
-  (interactive)
-  (wl-summary-rescan "size"))
+(defun wl-summary-sort-by-date (reverse)
+  "Sort summary lines into the order by message date; argument means descending order."
+  (interactive "P")
+  (wl-summary-rescan "date" reverse))
+(defun wl-summary-sort-by-number (reverse)
+  "Sort summary lines into the order by message number; argument means descending order."
+  (interactive "P")
+  (wl-summary-rescan "number" reverse))
+(defun wl-summary-sort-by-subject (reverse)
+  "Sort summary lines into the order by subject; argument means descending order."
+  (interactive "P")
+  (wl-summary-rescan "subject" reverse))
+(defun wl-summary-sort-by-from (reverse)
+  "Sort summary lines into the order by from; argument means descending order."
+  (interactive "P")
+  (wl-summary-rescan "from" reverse))
+(defun wl-summary-sort-by-list-info (reverse)
+  "Sort summary lines into the order by mailing list info; argument means descending order."
+  (interactive "P")
+  (wl-summary-rescan "list-info" reverse))
+(defun wl-summary-sort-by-size (reverse)
+  "Sort summary lines into the order by message size; argument means descending order."
+  (interactive "P")
+  (wl-summary-rescan "size" reverse))
 
-(defun wl-summary-rescan (&optional sort-by disable-killed disable-thread)
+(defun wl-summary-rescan (&optional sort-by reverse disable-killed disable-thread)
   "Rescan current folder without updating."
   (interactive)
   (let ((elmo-mime-charset wl-summary-buffer-mime-charset)
@@ -977,13 +1073,14 @@ Entering Folder mode calls the value of `wl-summary-mode-hook'."
        (predicate (and sort-by
                        (intern (format "wl-summary-overview-entity-compare-by-%s"
                                        sort-by))))
+       (sort-label (if reverse "Reverse sorting" "Sorting"))
        (i 0)
        num
        expunged)
     (erase-buffer)
     (message "Re-scanning...")
     (when sort-by
-      (message "Sorting by %s..." sort-by)
+      (message "%s by %s..." sort-label sort-by)
       (setq numbers
            (sort numbers
                  (lambda (x y)
@@ -991,14 +1088,15 @@ Entering Folder mode calls the value of `wl-summary-mode-hook'."
                     predicate
                     (elmo-message-entity wl-summary-buffer-elmo-folder x)
                     (elmo-message-entity wl-summary-buffer-elmo-folder y)))))
-      (message "Sorting by %s...done" sort-by))
+      (if reverse (setq numbers (nreverse numbers)))
+      (message "%s by %s...done" sort-label sort-by))
     (setq num (length numbers))
     (setq wl-thread-entity-hashtb (elmo-make-hash (* num 2))
          wl-thread-entity-list nil
          wl-thread-entities nil
          wl-summary-scored nil
          wl-summary-buffer-number-list nil
-         wl-summary-buffer-unsync-mark-number-list nil
+         wl-summary-buffer-persistent-mark-version 0
          wl-summary-buffer-target-mark-list nil
          wl-summary-buffer-temp-mark-list nil
          wl-summary-delayed-update nil)
@@ -1248,6 +1346,7 @@ Entering Folder mode calls the value of `wl-summary-mode-hook'."
                                     nil
                                   wl-use-scoring)))
             (wl-summary-rescan nil
+                               nil
                                (string-match "noscore" range)
                                (string-match "thread" range))
             (and msg (wl-summary-jump-to-msg msg))))
@@ -1470,20 +1569,11 @@ If ARG is non-nil, checking is omitted."
            (save-excursion
              (save-match-data
                ;; online
-               (if (or arg (not file-cached))
-                   (elmo-message-encache
-                    wl-summary-buffer-elmo-folder
-                    number))
+               (when (or arg (not file-cached))
+                 (elmo-message-encache wl-summary-buffer-elmo-folder
+                                       number))
                (elmo-message-set-cached wl-summary-buffer-elmo-folder
-                                        number t)
-               (when (and (wl-summary-jump-to-msg number)
-                          (wl-summary-update-persistent-mark))
-                 (sit-for 0)
-                 (wl-summary-count-unread)
-                 (wl-summary-update-modeline)
-                 (wl-folder-update-unread
-                  (wl-summary-buffer-folder-name)
-                  wl-summary-buffer-unread-count)))
+                                        number t))
              t)
          nil)))))
 
@@ -1617,7 +1707,8 @@ If ARG is non-nil, checking is omitted."
     (if (null number-list)
        (message "No message.")
       (wl-summary-set-persistent-mark-internal remove 'answered
-                                              number-list)
+                                              number-list
+                                              nil nil (interactive-p))
       (wl-summary-count-unread)
       (wl-summary-update-modeline))))
 
@@ -1632,7 +1723,8 @@ If ARG is non-nil, checking is omitted."
                                            'important))))
     (if (null number-list)
        (message "No message.")
-      (wl-summary-mark-as-important-internal remove number-list)
+      (wl-summary-set-persistent-mark-internal remove 'important number-list
+                                              nil nil (interactive-p))
       (wl-summary-count-unread)
       (wl-summary-update-modeline))))
 
@@ -1643,15 +1735,10 @@ If ARG is non-nil, checking is omitted."
       (let ((folder wl-summary-buffer-elmo-folder)
            (cur-buf (current-buffer)))
        (message "Setting all msgs as read...")
-       (elmo-folder-set-flag
+       (elmo-folder-unset-flag
         folder
         (elmo-folder-list-flagged folder 'unread 'in-msgdb)
-        'read)
-       (save-excursion
-         (goto-char (point-min))
-         (while (not (eobp))
-           (wl-summary-update-persistent-mark)
-           (forward-line 1)))
+        'unread)
        (wl-folder-update-unread (wl-summary-buffer-folder-name) 0)
        (setq wl-summary-buffer-unread-count 0)
        (setq wl-summary-buffer-new-count    0)
@@ -1666,7 +1753,7 @@ If ARG is non-nil, checking is omitted."
           number)
       (setq number (wl-summary-message-number))
       (elmo-message-set-cached folder number nil)
-      (when (wl-summary-update-persistent-mark)
+      (ignore-errors
        (elmo-file-cache-delete
         (elmo-file-cache-get-path
          (elmo-message-field wl-summary-buffer-elmo-folder
@@ -1686,7 +1773,6 @@ If ARG is non-nil, checking is omitted."
        (setq msgid (elmo-message-field folder number 'message-id))
        (elmo-message-set-cached folder number
                                 (elmo-file-cache-exists-p msgid))
-       (wl-summary-update-persistent-mark)
        (forward-line 1))
       (wl-summary-count-unread)
       (wl-summary-update-modeline)
@@ -1740,12 +1826,7 @@ If ARG is non-nil, checking is omitted."
     (goto-char beg)
     (while (and (< (point) end) (not (eobp)))
       (when (or (not check)
-               (let ((number (wl-summary-message-number)))
-                 (when (memq number wl-summary-buffer-unsync-mark-number-list)
-                   (setq wl-summary-buffer-unsync-mark-number-list
-                         (delq number
-                               wl-summary-buffer-unsync-mark-number-list))
-                   t)))
+               (wl-summary-persistent-mark-invalid-p))
        (wl-summary-update-persistent-mark))
       (forward-line 1))))
 
@@ -1765,67 +1846,51 @@ This function is defined for `window-scroll-functions'"
       (apply 'wl-summary-insert-thread args)
     (apply 'wl-summary-insert-sequential args)))
 
-(defun wl-summary-sort ()
-  (interactive)
+(defun wl-summary-sort (reverse)
+  "Sort summary lines into the selected order; argument means descending order."
+  (interactive "P")
   (wl-summary-rescan
    (completing-read
-    (format "Sort by (%s): " (symbol-name wl-summary-default-sort-spec))
+    (format "%s by (%s): "
+           (if reverse "Reverse sort" "Sort")
+           (symbol-name wl-summary-default-sort-spec))
     (mapcar (lambda (spec)
              (list (symbol-name spec)))
            wl-summary-sort-specs)
-    nil t nil nil (symbol-name wl-summary-default-sort-spec))))
+    nil t nil nil (symbol-name wl-summary-default-sort-spec))
+   reverse))
+
+(defun wl-summary-get-available-flags (&optional include-specials)
+  (let ((flags (elmo-uniq-list
+               (append elmo-global-flags
+                       (copy-sequence elmo-preserved-flags))
+               #'delq)))
+    (if include-specials
+       flags
+      (delq 'new (delq 'cached flags)))))
 
 (defun wl-summary-sync-marks ()
   "Update persistent marks in summary."
   (interactive)
   (let ((mes "Updated ")
        diff diffs)
-    ;; synchronize marks.
-    (when (not (eq (elmo-folder-type-internal
-                   wl-summary-buffer-elmo-folder)
-                  'internal))
-
-      (message "Updating marks...")
-      (dolist (flag elmo-global-flag-list)
-       (unless (memq flag elmo-preserved-flags)
-         (setq diff (elmo-list-diff (elmo-folder-list-flagged
-                                     wl-summary-buffer-elmo-folder
-                                     flag)
-                                    (elmo-folder-list-flagged
-                                     wl-summary-buffer-elmo-folder
-                                     flag 'in-msgdb)))
-         (setq diffs (cadr diff)) ; deletes
-         (setq mes (concat mes (format "-%d" (length diffs))))
-         (while diffs
-           (wl-summary-remove-flags-internal (car diffs)
-                                            (list flag) 'no-server)
-           (setq diffs (cdr diffs)))
-         (setq diffs (car diff)) ; appends
-         (setq mes (concat mes (format "/+%d %s," (length diffs) flag)))
-         (while diffs
-           (wl-summary-add-flags-internal (car diffs)
-                                         (list flag) 'no-server)
-           (setq diffs (cdr diffs)))))
-
-      (dolist (flag (delete 'new (delete 'cached
-                                        (copy-sequence elmo-preserved-flags))))
-       (setq diff (elmo-list-diff (elmo-folder-list-flagged
-                                   wl-summary-buffer-elmo-folder
-                                   flag)
-                                  (elmo-folder-list-flagged
-                                   wl-summary-buffer-elmo-folder
-                                   flag 'in-msgdb)))
-       (setq diffs (cadr diff))
-       (setq mes (concat mes (format "-%d" (length diffs))))
-       (while diffs
-         (wl-summary-unset-persistent-mark flag (car diffs) 'no-modeline)
-         (setq diffs (cdr diffs)))
-       (setq diffs (car diff)
-             mes (concat mes (format "/+%d %s " (length diffs) flag)))
-       (while diffs
-         (wl-summary-set-persistent-mark flag (car diffs) 'no-modeline)
-         (setq diffs (cdr diffs))))
-      (if (interactive-p) (message "%s" mes)))))
+    (message "Updating marks...")
+    (dolist (flag (wl-summary-get-available-flags))
+      (setq diff (elmo-list-diff (elmo-folder-list-flagged
+                                 wl-summary-buffer-elmo-folder
+                                 flag)
+                                (elmo-folder-list-flagged
+                                 wl-summary-buffer-elmo-folder
+                                 flag 'in-msgdb)))
+      (setq diffs (cadr diff))
+      (setq mes (concat mes (format "-%d" (length diffs))))
+      (when diffs
+       (wl-summary-unset-persistent-mark flag diffs 'no-modeline 'no-server))
+      (setq diffs (car diff)
+           mes (concat mes (format "/+%d %s " (length diffs) flag)))
+      (when diffs
+       (wl-summary-set-persistent-mark flag diffs 'no-modeline 'no-server)))
+    (if (interactive-p) (message "%s" mes))))
 
 (defun wl-summary-sync-update (&optional unset-cursor
                                         disable-killed
@@ -2016,18 +2081,27 @@ This function is defined for `window-scroll-functions'"
   (setq wl-summary-buffer-mode-line
        (funcall wl-summary-buffer-mode-line-formatter)))
 
-(defun wl-summary-jump-to-msg (&optional number)
+(defun wl-summary-jump-to-msg (&optional number beg end)
   (interactive "NJump to Number:")
   (let ((num (or number
                 (string-to-int
-                 (read-from-minibuffer "Jump to Message(No.): ")))))
-    (setq num (int-to-string num))
-    (beginning-of-line)
-    (if (or (and (re-search-forward (concat "\r" num "[^0-9]") nil t)
-                (progn (backward-char 1) t))
-           (re-search-backward (concat "\r" num "[^0-9]") nil t))
-       (progn (beginning-of-line) t)
-      nil)))
+                 (read-from-minibuffer "Jump to Message(No.): "))))
+       (pos (point))
+       regexp)
+    (setq regexp (concat "\r" (int-to-string num) "[^0-9]"))
+    (if (and beg end (or (< pos beg) (< end pos)))
+       (progn
+         (goto-char beg)
+         (if (re-search-forward regexp end t)
+             (progn (backward-char 1) (beginning-of-line) t)
+           (goto-char pos)
+           nil))
+      (beginning-of-line)
+      (if (or (and (re-search-forward regexp end t)
+                  (progn (backward-char 1) t))
+             (re-search-backward regexp beg t))
+         (progn (beginning-of-line) t)
+       nil))))
 
 (defun wl-summary-highlight-msgs (msgs)
   (save-excursion
@@ -2099,25 +2173,20 @@ If ARG, without confirm."
       (setq wl-summary-buffer-view 'thread))
     (wl-summary-update-modeline)
     (force-mode-line-update)
-    (wl-summary-rescan nil nil t)))
+    (wl-summary-rescan nil nil nil t)))
 
 (defun wl-summary-load-file-object (filename)
   "Load lisp object from dir."
-  (save-excursion
-    (let ((tmp-buffer (get-buffer-create " *wl-summary-load-file-object*"))
-         insert-file-contents-pre-hook   ; To avoid autoconv-xmas...
+  (with-temp-buffer
+    (let (insert-file-contents-pre-hook        ; To avoid autoconv-xmas...
          insert-file-contents-post-hook
          ret-val)
       (if (not (file-readable-p filename))
          ()
-       (set-buffer tmp-buffer)
        (as-binary-input-file (insert-file-contents filename))
-       (setq ret-val
-             (condition-case nil
-                 (read (current-buffer))
-               (error (error "Reading failed")))))
-      (kill-buffer tmp-buffer)
-      ret-val)))
+       (condition-case nil
+           (read (current-buffer))
+         (error (error "Reading failed")))))))
 
 (defun wl-summary-goto-folder (&optional arg)
   (interactive "P")
@@ -2180,7 +2249,7 @@ If ARG, without confirm."
                   wl-summary-buffer-message-modified
                   wl-summary-buffer-thread-modified
                   wl-summary-buffer-number-list
-                  wl-summary-buffer-unsync-mark-number-list
+                  wl-summary-buffer-persistent-mark-version
                   wl-summary-buffer-folder-name
                   wl-summary-buffer-line-formatter)
                 (and (eq wl-summary-buffer-view 'thread)
@@ -2302,9 +2371,14 @@ If ARG, without confirm."
          (unless (eq major-mode 'wl-summary-mode)
            (wl-summary-mode))
          (wl-summary-buffer-set-folder folder)
+         (setq wl-summary-buffer-display-mime-mode
+               (if (wl-summary-no-mime-p wl-summary-buffer-elmo-folder)
+                   'as-is
+                 'mime))
          (setq wl-summary-buffer-disp-msg nil)
          (setq wl-summary-buffer-last-displayed-msg nil)
          (setq wl-summary-buffer-current-msg nil)
+         (setq wl-summary-buffer-persistent-mark-version 0)
          (let ((inhibit-read-only t)
                (buffer-read-only nil))
            (erase-buffer)
@@ -2342,8 +2416,6 @@ If ARG, without confirm."
            (wl-summary-update-modeline)))
       (unless (eq wl-summary-buffer-view 'thread)
        (wl-summary-make-number-list))
-      (setq wl-summary-buffer-unsync-mark-number-list
-           (copy-sequence wl-summary-buffer-number-list))
       (when (and wl-summary-cache-use
                 (or (and wl-summary-check-line-format
                          (wl-summary-line-format-changed-p))
@@ -2421,7 +2493,8 @@ If ARG, without confirm."
              (wl-message-buffer-prefetch
               folder
               (wl-summary-message-number)
-              wl-message-buffer-prefetch-depth
+              (min (or wl-message-buffer-prefetch-depth 0)
+                   (1- wl-message-buffer-cache-size))
               (current-buffer)
               wl-summary-buffer-mime-charset))
          (if mes (message "%s" mes))
@@ -2440,6 +2513,11 @@ If ARG, without confirm."
     (when (and wl-summary-buffer-window-scroll-functions
               wl-on-xemacs)
       (sit-for 0))
+    (when (or (eq t wl-summary-force-prefetch-folder-list)
+             (wl-string-match-member
+              (elmo-folder-name-internal wl-summary-buffer-elmo-folder)
+              wl-summary-force-prefetch-folder-list))
+      (wl-summary-force-prefetch))
     (unwind-protect
        (run-hooks 'wl-summary-prepared-hook)
       (set-buffer-modified-p nil))
@@ -2507,7 +2585,7 @@ If ARG, without confirm."
 (defun wl-summary-default-subject-filter (subject)
   (setq subject (elmo-replace-in-string subject "[ \t]*\\(re\\|was\\)[:>]" ""))
   (setq subject (elmo-replace-in-string subject "[ \t]" ""))
-  (elmo-replace-in-string subject "^\\[.*\\]" ""))
+  (elmo-replace-in-string subject "^\\[[^]]*\\]" ""))
 
 (defun wl-summary-subject-equal (subject1 subject2)
   (string= (funcall wl-summary-subject-filter-function subject1)
@@ -2723,14 +2801,20 @@ If ARG, without confirm."
     i))
 
 (defun wl-summary-pick (&optional from-list delete-marks)
-  (interactive)
+  (interactive "i\nP")
   (save-excursion
-    (let* ((condition (car (elmo-parse-search-condition
-                           (elmo-read-search-condition
+    (let* ((messages (or from-list
+                        (elmo-folder-list-messages
+                         wl-summary-buffer-elmo-folder
+                         'visible
+                         'in-msgdb)
+                        (error "No messages")))
+          (condition (car (elmo-parse-search-condition
+                           (wl-read-search-condition
                             wl-summary-pick-field-default))))
           (result (elmo-folder-search wl-summary-buffer-elmo-folder
                                       condition
-                                      from-list))
+                                      messages))
           num)
       (if delete-marks
          (let ((mlist wl-summary-buffer-target-mark-list))
@@ -2767,7 +2851,7 @@ If ARG, exit virtual folder."
   (if arg
       (wl-summary-unvirtual)
     (wl-summary-goto-folder-subr (concat "/"
-                                        (elmo-read-search-condition
+                                        (wl-read-search-condition
                                          wl-summary-pick-field-default)
                                         "/"
                                         (wl-summary-buffer-folder-name))
@@ -2803,6 +2887,31 @@ If ARG, exit virtual folder."
        (wl-summary-get-score-mark number)
        " ")))
 
+(defun wl-summary-persistent-mark-invalid-p ()
+  (not
+   (equal
+    ;; mey be nil.
+    (get-text-property (point) 'wl-summary-persistent-mark-version)
+    wl-summary-buffer-persistent-mark-version)))
+
+(defun wl-summary-validate-persistent-mark (beg end)
+  (let ((inhibit-read-only t)
+       (buffer-read-only nil))
+    (put-text-property beg end
+                      'wl-summary-persistent-mark-version
+                      wl-summary-buffer-persistent-mark-version)
+    (set-buffer-modified-p nil)))
+
+(defun wl-summary-validate-persistent-mark-string (string)
+  (put-text-property 0 (length string)
+                    'wl-summary-persistent-mark-version
+                    wl-summary-buffer-persistent-mark-version
+                    string))
+
+(defun wl-summary-invalidate-persistent-mark ()
+  (setq wl-summary-buffer-persistent-mark-version
+       (1+ wl-summary-buffer-persistent-mark-version)))
+
 (defsubst wl-summary-persistent-mark-string (folder flags cached)
   "Return the persistent mark string.
 The mark is decided according to the FOLDER, FLAGS and CACHED."
@@ -2829,7 +2938,8 @@ The mark is decided according to the FOLDER, FLAGS and CACHED."
                             "wl-summary-%s-cached-mark" (car priorities))
                          (format
                           "wl-summary-%s-uncached-mark" (car priorities))))))
-                 (if (boundp var)
+                 (if (and (boundp var)
+                          (symbol-value var))
                      (symbol-value var)
                    (if cached
                        (downcase (substring (symbol-name (car priorities))
@@ -2840,7 +2950,7 @@ The mark is decided according to the FOLDER, FLAGS and CACHED."
     (or mark
        (if (or cached (elmo-folder-local-p folder))
            nil
-         wl-summary-read-uncached-mark))))
+         wl-summary-uncached-mark))))
 
 (defsubst wl-summary-message-mark (folder number &optional flags)
   "Return mark of the message."
@@ -2891,8 +3001,13 @@ The mark is decided according to the FOLDER, FLAGS and CACHED."
      (or (cadr (memq (current-buffer) buffers))
         (car buffers)))))
 
+(defun wl-summary-check-target-mark ()
+  (when (null wl-summary-buffer-target-mark-list)
+    (error "No marked message")))
+
 (defun wl-summary-target-mark-mark-as-read ()
   (interactive)
+  (wl-summary-check-target-mark)
   (save-excursion
     (goto-char (point-min))
     (let ((inhibit-read-only t)
@@ -2904,6 +3019,7 @@ The mark is decided according to the FOLDER, FLAGS and CACHED."
 
 (defun wl-summary-target-mark-mark-as-unread ()
   (interactive)
+  (wl-summary-check-target-mark)
   (save-excursion
     (goto-char (point-min))
     (let ((inhibit-read-only t)
@@ -2914,6 +3030,7 @@ The mark is decided according to the FOLDER, FLAGS and CACHED."
        (wl-summary-unset-mark number)))))
 
 (defun wl-summary-target-mark-operation (flag &optional inverse)
+  (wl-summary-check-target-mark)
   (save-excursion
     (let ((inhibit-read-only t)
          (buffer-read-only nil)
@@ -2934,6 +3051,7 @@ The mark is decided according to the FOLDER, FLAGS and CACHED."
 
 (defun wl-summary-target-mark-set-flags (&optional remove)
   (interactive "P")
+  (wl-summary-check-target-mark)
   (save-excursion
     (let ((inhibit-read-only t)
          (buffer-read-only nil)
@@ -2946,6 +3064,7 @@ The mark is decided according to the FOLDER, FLAGS and CACHED."
 
 (defun wl-summary-target-mark-save ()
   (interactive)
+  (wl-summary-check-target-mark)
   (let ((wl-save-dir
         (wl-read-directory-name "Save to directory: "
                                 wl-temporary-file-directory))
@@ -2959,6 +3078,7 @@ The mark is decided according to the FOLDER, FLAGS and CACHED."
 
 (defun wl-summary-target-mark-pick ()
   (interactive)
+  (wl-summary-check-target-mark)
   (wl-summary-pick wl-summary-buffer-target-mark-list 'delete))
 
 (defun wl-summary-update-persistent-mark (&optional number flags)
@@ -2973,11 +3093,14 @@ Return non-nil if the mark is updated"
                (buffer-read-only nil)
                (mark (buffer-substring (- (point) 1) (point)))
                (new-mark (wl-summary-persistent-mark number flags)))
-           (unless (string= new-mark mark)
-             (delete-backward-char 1)
-             (insert new-mark)
-             (wl-summary-set-message-modified)
-             t))))
+           (prog1
+               (unless (string= new-mark mark)
+                 (delete-backward-char 1)
+                 (insert new-mark)
+                 (wl-summary-set-message-modified)
+                 t)
+             (wl-summary-validate-persistent-mark (point-at-bol)
+                                                  (point-at-eol))))))
     (when wl-summary-highlight
       (wl-highlight-summary-current-line))
     (set-buffer-modified-p nil)))
@@ -2989,7 +3112,7 @@ Return non-nil if the mark is updated"
   (save-excursion
     (let ((folder wl-summary-buffer-elmo-folder)
          unread-message number
-         number-list visible)
+         number-list)
       (setq number-list (cond ((numberp number-or-numbers)
                               (setq unread-message
                                     (elmo-message-flagged-p
@@ -3011,16 +3134,13 @@ Return non-nil if the mark is updated"
       (if (null number-list)
          (message "No message.")
        (if inverse
-           (elmo-folder-unset-flag folder number-list 'read no-folder-mark)
-         (elmo-folder-set-flag folder number-list 'read no-folder-mark))
-       (dolist (number number-list)
-         (setq visible (wl-summary-jump-to-msg number))
-         (unless inverse
-           (when unread-message
-             (run-hooks 'wl-summary-unread-message-hook)))
-         ;; set mark on buffer
-         (when visible
-           (wl-summary-update-persistent-mark)))
+           (elmo-folder-set-flag folder number-list 'unread no-folder-mark)
+         (elmo-folder-unset-flag folder number-list 'unread no-folder-mark))
+       (when (and unread-message
+                  (not inverse))
+         (dolist (number number-list)
+           (wl-summary-jump-to-msg number)
+           (run-hooks 'wl-summary-unread-message-hook)))
        (unless no-modeline-update
          ;; Update unread numbers.
          (wl-summary-count-unread)
@@ -3048,13 +3168,15 @@ Return non-nil if the mark is updated"
                                    no-modeline-update))
 
 (defsubst wl-summary-set-persistent-mark-internal (inverse
-                                                  &optional flag
-                                                  number-or-numbers
-                                                  no-modeline-update)
+                                                  flag
+                                                  &optional number-or-numbers
+                                                  no-modeline-update
+                                                  no-server
+                                                  interactive)
   "Set persistent mark."
   (save-excursion
     (let ((folder wl-summary-buffer-elmo-folder)
-         number number-list visible)
+         number number-list)
       (setq number-list (cond ((numberp number-or-numbers)
                               (list number-or-numbers))
                              ((and (not (null number-or-numbers))
@@ -3065,73 +3187,88 @@ Return non-nil if the mark is updated"
                               (list number))))
       (if (null number-list)
          (message "No message.")
-       (if inverse
-           (elmo-folder-unset-flag folder number-list flag)
-         (elmo-folder-set-flag folder number-list flag))
-       (dolist (number number-list)
-         (setq visible (wl-summary-jump-to-msg number))
-         ;; set mark on buffer
-         (when visible
-           (wl-summary-update-persistent-mark)))
-       (unless no-modeline-update
-         ;; Update unread numbers.
-         ;; should elmo-flag-mark-as-read return unread numbers?
-         (wl-summary-count-unread)
-         (wl-summary-update-modeline)
-         (wl-folder-update-unread
-          (wl-summary-buffer-folder-name)
-          wl-summary-buffer-unread-count))))))
+       ;; XXX Only the first element of the list is checked.
+       (if (elmo-message-flag-available-p folder (car number-list) flag)
+           (progn
+             (if inverse
+                 (elmo-folder-unset-flag folder number-list flag no-server)
+               (elmo-folder-set-flag folder number-list flag no-server))
+             (unless no-modeline-update
+               ;; Update unread numbers.
+               ;; should elmo-flag-mark-as-read return unread numbers?
+               (wl-summary-count-unread)
+               (wl-summary-update-modeline)
+               (wl-folder-update-unread
+                (wl-summary-buffer-folder-name)
+                wl-summary-buffer-unread-count)))
+         (if interactive
+             (error "Flag `%s' is not available in this folder" flag)))))))
 
 (defun wl-summary-unset-persistent-mark (&optional flag
                                                   number-or-numbers
-                                                  no-modeline-update)
+                                                  no-modeline-update
+                                                  no-server)
   "Unset persistent mark."
   (interactive)
   (when (interactive-p)
     (let ((completion-ignore-case t))
       (setq flag (intern (downcase
                          (completing-read
-                          "Flag: "
+                          "Mark name: "
                           (mapcar (lambda (flag)
                                     (list (capitalize (symbol-name flag))))
-                                  (delq
-                                   'cached
-                                   (delq 'new
-                                         (elmo-uniq-list
-                                          (append elmo-global-flag-list
-                                                  elmo-preserved-flags)))))
+                                  (wl-summary-get-available-flags))
                           nil
                           'require-match))))))
   (wl-summary-set-persistent-mark-internal 'inverse
                                           flag
                                           number-or-numbers
-                                          no-modeline-update))
+                                          no-modeline-update
+                                          no-server
+                                          (interactive-p)))
 
 (defun wl-summary-set-persistent-mark (&optional flag
                                                 number-or-numbers
-                                                no-modeline-update)
+                                                no-modeline-update
+                                                no-server)
   "Set persistent mark."
   (interactive)
   (when (interactive-p)
     (let ((completion-ignore-case t))
       (setq flag (intern (downcase
                          (completing-read
-                          "Flag: "
+                          "Mark name: "
                           (mapcar (lambda (flag)
                                     (list (capitalize (symbol-name flag))))
-                                   (delq
-                                    'cached
-                                    (delq 'new
-                                          (elmo-uniq-list
-                                           (append elmo-global-flag-list
-                                                   elmo-preserved-flags)))))
+                                  (wl-summary-get-available-flags))
                           nil
                           'require-match))))))
-  (wl-summary-set-persistent-mark-internal
-   nil
-   flag
-   number-or-numbers
-   no-modeline-update))
+  (wl-summary-set-persistent-mark-internal nil
+                                          flag
+                                          number-or-numbers
+                                          no-modeline-update
+                                          no-server
+                                          (interactive-p)))
+
+(defun wl-summary-toggle-persistent-mark (&optional force)
+  "Toggle persistent mark."
+  (interactive "P")
+  (let ((completion-ignore-case t)
+       flag)
+    (setq flag (intern (downcase
+                       (completing-read
+                        "Mark name: "
+                        (mapcar (lambda (flag)
+                                  (list (capitalize (symbol-name flag))))
+                                (wl-summary-get-available-flags))
+                        nil
+                        'require-match))))
+    (if (and (elmo-message-flagged-p wl-summary-buffer-elmo-folder
+                                    (wl-summary-message-number)
+                                    flag)
+            (not force))
+       (wl-summary-unset-persistent-mark flag)
+      (wl-summary-set-persistent-mark flag))))
 
 (defun wl-summary-mark-as-answered (&optional number-or-numbers
                                              no-modeline-update)
@@ -3143,7 +3280,9 @@ Return non-nil if the mark is updated"
                                'answered))
    'answered
    number-or-numbers
-   no-modeline-update))
+   no-modeline-update
+   nil
+   (interactive-p)))
 
 (defun wl-summary-mark-as-unanswered (&optional number-or-numbers
                                                no-modeline-update)
@@ -3168,18 +3307,22 @@ Return non-nil if the mark is updated"
                  "Flags: "
                  (mapcar (lambda (flag)
                            (list (capitalize (symbol-name flag))))
-                         elmo-global-flag-list)
+                         elmo-global-flags)
                  nil nil (mapconcat (lambda (flag)
                                       (capitalize (symbol-name flag)))
                                     flags
                                     ",")))))
     (dolist (flag new-flags)
-      (unless (memq flag elmo-global-flag-list)
-       (if (y-or-n-p (format "Flag `%s' does not exist yet. Create?"
+      (unless (memq flag elmo-global-flags)
+       (when (elmo-local-flag-p flag)
+         (error "Cannot treat `%s'." flag))
+       (unless (elmo-flag-valid-p flag)
+         (error "Invalid char in `%s'" flag))
+       (if (y-or-n-p (format "Flag `%s' is not registered yet. Register?"
                              (capitalize (symbol-name flag))))
-           (setq elmo-global-flag-list (append
-                                        elmo-global-flag-list
-                                        (list flag)))
+           (setq elmo-global-flags (append
+                                    elmo-global-flags
+                                    (list flag)))
          (error "Stopped"))))
     new-flags))
 
@@ -3190,7 +3333,7 @@ Return non-nil if the mark is updated"
                                        remove-all)
   (save-excursion
     (let ((folder wl-summary-buffer-elmo-folder)
-         number number-list visible)
+         number number-list)
       (setq number-list (cond ((numberp number-or-numbers)
                               (list number-or-numbers))
                              ((and (not (null number-or-numbers))
@@ -3206,92 +3349,24 @@ Return non-nil if the mark is updated"
       (if (null number-list)
          (message "No message.")
        (dolist (number number-list)
-         (elmo-message-set-global-flags folder number flags local)
-         (setq visible (wl-summary-jump-to-msg number))
-         ;; set mark on buffer
-         (when visible
-           (wl-summary-update-persistent-mark))))
+         (elmo-message-set-global-flags folder number flags local)))
       flags)))
 
-(defsubst wl-summary-add-flags-internal (&optional
-                                        number-or-numbers
-                                        flags
-                                        local)
-  (save-excursion
-    (let ((folder wl-summary-buffer-elmo-folder)
-         set-flags msg number-list visible)
-      (setq number-list (cond ((numberp number-or-numbers)
-                              (list number-or-numbers))
-                             ((and (not (null number-or-numbers))
-                                   (listp number-or-numbers))
-                              number-or-numbers)
-                             ((setq msg (wl-summary-message-number))
-                              ;; interactive
-                              (list msg))))
-      (if (null number-list)
-         (message "No message.")
-       (dolist (number number-list)
-         (setq set-flags
-               (elmo-get-global-flags
-                (elmo-message-flags folder number)))
-         (setq set-flags (nconc flags set-flags))
-         (elmo-message-set-global-flags folder number set-flags local)
-         (setq visible (wl-summary-jump-to-msg number))
-         ;; set mark on buffer
-         (when visible
-           (wl-summary-update-persistent-mark)))))))
-
-(defsubst wl-summary-remove-flags-internal (&optional
-                                           number-or-numbers
-                                           flags
-                                           local)
-  (save-excursion
-    (let ((folder wl-summary-buffer-elmo-folder)
-         set-flags msg number-list visible)
-      (setq number-list (cond ((numberp number-or-numbers)
-                              (list number-or-numbers))
-                             ((and (not (null number-or-numbers))
-                                   (listp number-or-numbers))
-                              number-or-numbers)
-                             ((setq msg (wl-summary-message-number))
-                              ;; interactive
-                              (list msg))))
-      (if (null number-list)
-         (message "No message.")
-       (dolist (number number-list)
-         (setq set-flags (elmo-get-global-flags
-                          (elmo-message-flags folder number)))
-         (dolist (flag flags)
-           (setq set-flags (delq flag set-flags)))
-         (elmo-message-set-global-flags folder number set-flags local)
-         (setq visible (wl-summary-jump-to-msg number))
-         ;; set mark on buffer
-         (when visible
-           (wl-summary-update-persistent-mark)))))))
-
 (defun wl-summary-set-flags (&optional remove)
   (interactive "P")
-  (if (eq 'flag (elmo-folder-type-internal wl-summary-buffer-elmo-folder))
-      (error "Cannot process flags in this folder"))
   (wl-summary-set-flags-internal nil nil nil remove))
 
-(defun wl-summary-mark-as-important-internal (inverse
-                                             &optional number-or-numbers)
-  (if inverse
-      (wl-summary-remove-flags-internal number-or-numbers '(important))
-    (wl-summary-add-flags-internal number-or-numbers '(important))))
-
 (defun wl-summary-mark-as-important (&optional prompt)
   (interactive "P")
-  (if (eq 'flag (elmo-folder-type-internal wl-summary-buffer-elmo-folder))
-      (error "Cannot process flags in this folder"))
   (if prompt
       (wl-summary-set-flags-internal)
-    (wl-summary-mark-as-important-internal
+    (wl-summary-set-persistent-mark-internal
      (and (interactive-p)
          (elmo-message-flagged-p wl-summary-buffer-elmo-folder
                                  (wl-summary-message-number)
-                                 'important)))))
+                                 'important))
+     'important
+     nil nil nil (interactive-p))))
 
 ;;; Summary line.
 (defvar wl-summary-line-formatter nil)
@@ -3459,6 +3534,7 @@ Return non-nil if the mark is updated"
                       (number-to-string
                        (elmo-message-entity-number
                         wl-message-entity))))
+    (wl-summary-validate-persistent-mark-string line)
     (if wl-summary-highlight
        (wl-highlight-summary-line-string
         (elmo-message-entity-number wl-message-entity)
@@ -3585,11 +3661,9 @@ Return non-nil if the mark is updated"
                  (write-region-as-binary (point-min)(point-max)
                                          cache nil 'no-msg)))
              (when (file-writable-p view) ; 'thread or 'sequence
-               (save-excursion
-                 (set-buffer tmp-buffer)
-                 (erase-buffer)
-                 (prin1 save-view tmp-buffer)
-                 (princ "\n" tmp-buffer)
+               (with-temp-buffer
+                 (prin1 save-view (current-buffer))
+                 (princ "\n" (current-buffer))
                  (write-region (point-min) (point-max) view nil 'no-msg))))
          ;; kill tmp buffer.
          (kill-buffer tmp-buffer))))))
@@ -3772,10 +3846,10 @@ Return non-nil if the mark is updated"
 Basically, it shows next line of the message.
 If optional argument ARG is specified, behave as followed.
 If ARG is number, jump to the message.
-Otherwise it shows previous line of th message."
+Otherwise it shows previous line of the message."
   (interactive "P")
   (cond ((numberp arg)
-        (unless (wl-summary-jump-to-msg arg)
+        (unless (wl-thread-jump-to-msg arg)
           (message "Message (#%d) was not found." arg)))
        (arg
         (wl-summary-prev-line-content))
@@ -3837,15 +3911,14 @@ Return t if message exists."
        (progn
          (set-buffer wl-message-buffer)
          t)
-      (if (wl-summary-no-mime-p folder)
-         (wl-summary-redisplay-no-mime-internal folder number)
-       (wl-summary-redisplay-internal folder number))
+      (wl-summary-redisplay-internal folder number)
       (when (buffer-live-p wl-message-buffer)
        (set-buffer wl-message-buffer))
       nil)))
 
 (defun wl-summary-target-mark-forward (&optional arg)
   (interactive "P")
+  (wl-summary-check-target-mark)
   (let ((mlist (nreverse (copy-sequence wl-summary-buffer-target-mark-list)))
        (summary-buf (current-buffer))
        (wl-draft-forward t)
@@ -3876,6 +3949,7 @@ Return t if message exists."
 
 (defun wl-summary-target-mark-reply-with-citation (&optional arg)
   (interactive "P")
+  (wl-summary-check-target-mark)
   (let ((mlist (nreverse (copy-sequence wl-summary-buffer-target-mark-list)))
        (summary-buf (current-buffer))
        change-major-mode-hook
@@ -4110,9 +4184,7 @@ Reply to author if invoked with ARG."
     (when number
       (save-excursion
        (wl-summary-set-message-buffer-or-redisplay))
-      (setq mes-buf wl-message-buffer)
       (wl-message-select-buffer wl-message-buffer)
-      (set-buffer mes-buf)
       (condition-case err
          (when (setq mes-buf (wl-message-get-original-buffer))
            (wl-draft-reply mes-buf arg summary-buf number)
@@ -4175,7 +4247,6 @@ Use function list is `wl-summary-write-current-folder-functions'."
        (number (wl-summary-message-number))
        (summary-buf (current-buffer))
        (wl-draft-forward t)
-       mes-buf
        entity subject num)
     (if (null number)
        (message "No message.")
@@ -4187,17 +4258,10 @@ Use function list is `wl-summary-write-current-folder-functions'."
          ;; Reload.
          (wl-summary-redisplay-internal nil nil 'force-reload)
        (wl-summary-redisplay-internal folder number))
-      (setq mes-buf wl-message-buffer)
-      (wl-message-select-buffer mes-buf)
-      ;; get original subject.
-      (if summary-buf
-         (save-excursion
-           (set-buffer summary-buf)
-           (setq subject
-                 (or (elmo-message-entity-field
-                      (elmo-message-entity folder number) 'subject 'decode)
-                     ""))))
-      (set-buffer mes-buf)
+      (wl-message-select-buffer wl-message-buffer)
+      (setq subject (with-current-buffer
+                       wl-message-buffer-original-buffer
+                     (std11-field-body "Subject")))
       (wl-draft-forward subject summary-buf number)
       (with-current-buffer summary-buf (run-hooks 'wl-summary-forward-hook))
       (unless without-setup-hook
@@ -4370,19 +4434,99 @@ Use function list is `wl-summary-write-current-folder-functions'."
            (wl-summary-redisplay)))
     (message "No last message.")))
 
+(defun wl-summary-message-display-type ()
+  (when (and wl-summary-buffer-disp-msg
+            (buffer-live-p wl-message-buffer)
+            wl-summary-buffer-current-msg
+            (wl-summary-message-number)
+            (= (wl-summary-message-number) wl-summary-buffer-current-msg))
+    (wl-message-buffer-display-type wl-message-buffer)))
+
+(defun wl-summary-buffer-display-mime-mode ()
+  (or (wl-message-display-type-property (wl-summary-message-display-type)
+                                       :mime)
+      wl-summary-buffer-display-mime-mode))
+
+(defun wl-summary-buffer-display-header-mode ()
+  (or (wl-message-display-type-property (wl-summary-message-display-type)
+                                       :header)
+      wl-summary-buffer-display-header-mode))
+
+(defun wl-summary-toggle-mime (&optional arg)
+  "Toggle MIME decoding.
+If ARG is non-nil, ask coding-system to display the message in the current
+MIME analysis mode.
+
+If ARG is numeric number, decode message as following:
+1: Enable MIME analysis.
+2: Enable MIME analysis only for headers.
+3: Disable MIME analysis."
+  (interactive "P")
+  (let ((mime-mode (wl-summary-buffer-display-mime-mode))
+       (elmo-mime-display-as-is-coding-system
+        elmo-mime-display-as-is-coding-system))
+    (if (and (consp arg) (> (prefix-numeric-value arg) 4))
+       (progn
+         (setq wl-summary-buffer-display-mime-mode mime-mode)
+         (wl-summary-update-modeline))
+      (cond
+       ((numberp arg)
+       (setq mime-mode (case arg
+                         (1 'mime)
+                         (2 'header-only)
+                         (3 'as-is)
+;;;                      (4 'decode-only)
+                         (5 'no-merge))))
+       (arg
+       ;; Specify coding-system (doesn't change the MIME mode).
+       (setq elmo-mime-display-as-is-coding-system
+             (if (and arg
+                      (not (wl-message-mime-analysis-p
+                            (wl-summary-message-display-type))))
+                 (or (read-coding-system "Coding system: ")
+                     elmo-mime-display-as-is-coding-system)
+               elmo-mime-display-as-is-coding-system)))
+       (t
+       ;; Change the MIME mode.
+       (setq mime-mode (or (cadr (memq mime-mode
+                                       wl-summary-display-mime-mode-list))
+                           (car wl-summary-display-mime-mode-list)))))
+      (wl-summary-redisplay-internal nil nil arg mime-mode))
+    (message "MIME decoding: %s%s"
+            (upcase (symbol-name mime-mode))
+            (if (and (not (eq mime-mode 'mime))
+                     (not (eq elmo-mime-display-as-is-coding-system
+                              wl-cs-autoconv)))
+                (concat " ("
+                        (symbol-name elmo-mime-display-as-is-coding-system)
+                        ")")
+              ""))))
+
 (defun wl-summary-redisplay (&optional arg)
+  "Redisplay message."
   (interactive "P")
-  (if (and (not arg)
-          (wl-summary-no-mime-p wl-summary-buffer-elmo-folder))
-      (wl-summary-redisplay-no-mime)
-    (wl-summary-redisplay-internal nil nil arg)))
+  (apply #'wl-summary-redisplay-internal nil nil arg
+        (unless (and (consp arg) (> (prefix-numeric-value arg) 4))
+          (list wl-summary-buffer-display-mime-mode
+                wl-summary-buffer-display-header-mode))))
 
-(defun wl-summary-redisplay-internal (&optional folder number force-reload)
+(defun wl-summary-toggle-all-header (&optional arg)
+  "Toggle displaying message with all header."
+  (interactive "P")
+  (let ((header-mode (wl-summary-buffer-display-header-mode)))
+    (if (and (consp arg) (> (prefix-numeric-value arg) 4))
+       (setq wl-summary-buffer-display-header-mode header-mode)
+      (wl-summary-redisplay-internal
+       nil nil arg nil
+       (if (eq header-mode 'all) 'partial 'all)))))
+
+(defun wl-summary-redisplay-internal (&optional folder number force-reload
+                                               mime-mode header-mode)
   (let* ((folder (or folder wl-summary-buffer-elmo-folder))
         (num (or number (wl-summary-message-number)))
         (wl-mime-charset      wl-summary-buffer-mime-charset)
         (default-mime-charset wl-summary-buffer-mime-charset)
-        no-folder-mark fld-buf fld-win thr-entity
+        fld-buf fld-win thr-entity
         (elmo-message-fetch-confirm (or elmo-message-fetch-confirm
                                         (and force-reload
                                              elmo-message-fetch-threshold))))
@@ -4404,108 +4548,39 @@ Use function list is `wl-summary-write-current-folder-functions'."
              (if (setq fld-win (get-buffer-window fld-buf))
                  (delete-window fld-win)))
          (setq wl-current-summary-buffer (current-buffer))
-         (setq no-folder-mark
-               ;; If cache is used, change folder-mark.
-               (if (wl-message-redisplay folder num
-                                         'mime
-                                         (or
-                                          force-reload
-                                          (string= (elmo-folder-name-internal
-                                                    folder)
-                                                   wl-draft-folder)))
-                   nil
-                 ;; plugged, then leave folder-mark.
-                 (if (and (not (elmo-folder-local-p
-                                wl-summary-buffer-elmo-folder))
-                          (elmo-folder-plugged-p
-                           wl-summary-buffer-elmo-folder))
-                     'leave)))
+         (wl-message-redisplay folder num
+                               (wl-message-make-display-type
+                                (or mime-mode
+                                    (wl-summary-buffer-display-mime-mode))
+                                (or header-mode
+                                    (wl-summary-buffer-display-header-mode)))
+                               (or force-reload
+                                   (string= (elmo-folder-name-internal folder)
+                                            wl-draft-folder)))
          (when (elmo-message-use-cache-p folder num)
            (elmo-message-set-cached folder num t))
          (ignore-errors
            (if (elmo-message-flagged-p wl-summary-buffer-elmo-folder
                                        num
                                        'unread)
-               (wl-summary-mark-as-read num no-folder-mark)
-             (wl-summary-update-persistent-mark)))
-         (setq wl-summary-buffer-current-msg num)
-         (when wl-summary-recenter
-           (recenter (/ (- (window-height) 2) 2))
-           (if (not wl-summary-indent-length-limit)
-               (wl-horizontal-recenter)))
-         (wl-highlight-summary-displaying)
-         (wl-message-buffer-prefetch-next folder num
-                                          wl-message-buffer-prefetch-depth
-                                          (current-buffer)
-                                          wl-summary-buffer-mime-charset)
-         (run-hooks 'wl-summary-redisplay-hook))
-      (message "No message to display."))))
-
-(defun wl-summary-redisplay-no-mime (&optional ask-coding)
-  "Display message without MIME decoding.
-If ASK-CODING is non-nil, coding-system for the message is asked."
-  (interactive "P")
-  (let ((elmo-mime-display-as-is-coding-system
-        (if ask-coding
-            (or (read-coding-system "Coding system: ")
-                elmo-mime-display-as-is-coding-system)
-          elmo-mime-display-as-is-coding-system)))
-    (wl-summary-redisplay-no-mime-internal)))
-
-(defun wl-summary-redisplay-no-mime-internal (&optional folder number)
-  (let* ((fld (or folder wl-summary-buffer-elmo-folder))
-        (num (or number (wl-summary-message-number)))
-        wl-break-pages)
-    (if num
-       (progn
-         (setq wl-summary-buffer-disp-msg t)
-         (setq wl-summary-buffer-last-displayed-msg
-               wl-summary-buffer-current-msg)
-         (setq wl-current-summary-buffer (current-buffer))
-         (wl-message-redisplay fld num 'as-is
-                               (string= (elmo-folder-name-internal fld)
-                                        wl-draft-folder))
-         (when (elmo-message-use-cache-p fld num)
-           (elmo-message-set-cached fld num t))
-         (ignore-errors
-           (if (elmo-message-flagged-p fld num 'unread)
-               (wl-summary-mark-as-read num); no-folder-mark)
-             (wl-summary-update-persistent-mark)))
-         (setq wl-summary-buffer-current-msg num)
-         (when wl-summary-recenter
-           (recenter (/ (- (window-height) 2) 2))
-           (if (not wl-summary-indent-length-limit)
-               (wl-horizontal-recenter)))
-         (wl-highlight-summary-displaying)
-         (run-hooks 'wl-summary-redisplay-hook))
-      (message "No message to display.")
-      (wl-ask-folder 'wl-summary-exit
-                    "No more messages. Type SPC to go to folder mode."))))
-
-(defun wl-summary-redisplay-all-header (&optional folder number)
-  (interactive)
-  (let* ((fld (or folder wl-summary-buffer-elmo-folder))
-        (num (or number (wl-summary-message-number)))
-        (wl-mime-charset      wl-summary-buffer-mime-charset)
-        (default-mime-charset wl-summary-buffer-mime-charset))
-    (if num
-       (progn
-         (setq wl-summary-buffer-disp-msg t)
-         (setq wl-summary-buffer-last-displayed-msg
-               wl-summary-buffer-current-msg)
-         (setq wl-current-summary-buffer (current-buffer))
-         (when (elmo-message-use-cache-p fld num)
-           (elmo-message-set-cached fld num t))
-         (if (wl-message-redisplay fld num 'all-header
-                                   (string= (elmo-folder-name-internal fld)
-                                            wl-draft-folder))
-             (wl-summary-mark-as-read num))
+               (wl-summary-mark-as-read num)
+             (wl-summary-count-unread)
+             (wl-summary-update-modeline)
+             (wl-folder-update-unread
+              (wl-summary-buffer-folder-name)
+              wl-summary-buffer-unread-count)))
          (setq wl-summary-buffer-current-msg num)
          (when wl-summary-recenter
            (recenter (/ (- (window-height) 2) 2))
            (if (not wl-summary-indent-length-limit)
                (wl-horizontal-recenter)))
          (wl-highlight-summary-displaying)
+         (wl-message-buffer-prefetch-next
+          folder num
+          (min (or wl-message-buffer-prefetch-depth 0)
+               (1- wl-message-buffer-cache-size))
+          (current-buffer)
+          wl-summary-buffer-mime-charset)
          (run-hooks 'wl-summary-redisplay-hook))
       (message "No message to display."))))
 
@@ -4610,25 +4685,23 @@ If ASK-CODING is non-nil, coding-system for the message is asked."
   (interactive)
   (let ((filename)
        (num (wl-summary-message-number)))
-    (if (null wl-save-dir)
-       (setq wl-save-dir wl-temporary-file-directory))
+    (unless wl-save-dir
+      (setq wl-save-dir wl-temporary-file-directory))
     (if num
        (save-excursion
          (setq filename (expand-file-name
                          (concat (int-to-string num)
                                  wl-summary-save-file-suffix)
                          wl-save-dir))
-         (if (null (and arg
-                        (null (file-exists-p filename))))
-             (setq filename
-                   (read-file-name "Save to file: " filename)))
-
+         (when (or (null arg)
+                   (file-exists-p filename))
+           (setq filename (read-file-name "Save to file: " filename)))
          (wl-summary-set-message-buffer-or-redisplay)
          (set-buffer (wl-message-get-original-buffer))
-         (if (and (null arg) (file-exists-p filename))
-             (if (y-or-n-p "File already exists.  override it? ")
-                 (write-region (point-min) (point-max) filename))
-           (write-region (point-min) (point-max) filename)))
+         (when (or arg
+                   (not (file-exists-p filename))
+                   (y-or-n-p "File already exists.  override it? "))
+           (write-region-as-binary (point-min) (point-max) filename)))
       (message "No message to save."))
     num))
 
@@ -4722,7 +4795,6 @@ If ASK-CODING is non-nil, coding-system for the message is asked."
              wl-break-pages)
          (save-excursion
            (wl-summary-set-message-buffer-or-redisplay)
-           ;; (wl-summary-redisplay-internal)
            (let* ((buffer (generate-new-buffer " *print*"))
                   (entity (progn
                             (set-buffer summary-buffer)
@@ -4760,14 +4832,13 @@ If ASK-CODING is non-nil, coding-system for the message is asked."
 
 (defun wl-summary-target-mark-print ()
   (interactive)
-  (if (null wl-summary-buffer-target-mark-list)
-      (message "No marked message.")
-    (when (y-or-n-p "Print all marked messages. OK? ")
-      (while (car wl-summary-buffer-target-mark-list)
-       (let ((num (car wl-summary-buffer-target-mark-list)))
-         (wl-thread-jump-to-msg num)
-         (wl-summary-print-message)
-         (wl-summary-unmark))))))
+  (wl-summary-check-target-mark)
+  (when (y-or-n-p "Print all marked messages. OK? ")
+    (while (car wl-summary-buffer-target-mark-list)
+      (let ((num (car wl-summary-buffer-target-mark-list)))
+       (wl-thread-jump-to-msg num)
+       (wl-summary-print-message)
+       (wl-summary-unmark)))))
 
 (defun wl-summary-folder-info-update ()
   (wl-folder-set-folder-updated
@@ -4787,10 +4858,11 @@ If ASK-CODING is non-nil, coding-system for the message is asked."
   (interactive "P")
   (elmo-folder-pack-numbers wl-summary-buffer-elmo-folder)
   (let (wl-use-scoring)
-    (wl-summary-rescan nil nil t)))
+    (wl-summary-rescan nil nil nil t)))
 
 (defun wl-summary-target-mark-uudecode ()
   (interactive)
+  (wl-summary-check-target-mark)
   (let ((mlist (reverse wl-summary-buffer-target-mark-list))
        (summary-buf (current-buffer))
        (tmp-buf (get-buffer-create "*WL UUENCODE*"))