X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=wl%2Fwl-thread.el;h=9c82126a4bbe0bbbae24d7ff46e0401b4d7c1a9c;hb=a188e316446f771a0900c8e05026e39b224eb0f9;hp=ea40c2a825212d00784b2bca49a91bf4cd3583b1;hpb=904f224e492403eb92709aa60d90858c2d1b714d;p=elisp%2Fwanderlust.git

diff --git a/wl/wl-thread.el b/wl/wl-thread.el
index ea40c2a..9c82126 100644
--- a/wl/wl-thread.el
+++ b/wl/wl-thread.el
@@ -1,8 +1,10 @@
-;;; wl-thread.el -- Thread display modules for Wanderlust.
+;;; wl-thread.el --- Thread display modules for Wanderlust.
 
-;; Copyright 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
+;; Copyright (C) 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
+;; Copyright (C) 1998,1999,2000 Masahiro MURATA  <muse@ba2.so-net.ne.jp>
 
 ;; Author: Yuuichi Teranishi <teranisi@gohome.org>
+;;	Masahiro MURATA  <muse@ba2.so-net.ne.jp>
 ;; Keywords: mail, net news
 
 ;; This file is part of Wanderlust (Yet Another Message Interface on Emacsen).
@@ -24,101 +26,91 @@
 ;;
 
 ;;; Commentary:
-;; 
+;;
 
 ;;; Code:
-;; 
+;;
 
 (require 'wl-summary)
 (require 'wl-highlight)
+(eval-when-compile (require 'cl))
 
 ;; buffer local variables.
-;(defvar wl-thread-top-entity '(nil t nil nil)) ; top entity
-(defvar wl-thread-tops nil)           ; top number list (number)
+;;(defvar wl-thread-top-entity '(nil t nil nil)) ; top entity
+(defvar wl-thread-tops nil)		; top number list (number)
 (defvar wl-thread-entities nil)
-(defvar wl-thread-entity-list nil)    ; entity list
-(defvar wl-thread-entity-hashtb nil)  ; obarray
-(defvar wl-thread-indent-regexp nil)
-
-(mapcar 
- (function make-variable-buffer-local)
- (list 'wl-thread-entity-hashtb
-       'wl-thread-entities     ; -> ".wl-thread-entity"
-       'wl-thread-entity-list  ; -> ".wl-thread-entity-list"
-       'wl-thread-entity-cur
-       'wl-thread-indent-regexp))
+(defvar wl-thread-entity-list nil)	; entity list
+(defvar wl-thread-entity-hashtb nil)	; obarray
+
+(make-variable-buffer-local 'wl-thread-entity-hashtb)
+(make-variable-buffer-local 'wl-thread-entities)     ; ".wl-thread-entity"
+(make-variable-buffer-local 'wl-thread-entity-list)  ; ".wl-thread-entity-list"
 
 ;;; global flag
 (defvar wl-thread-insert-force-opened nil)
 
 ;;;;;; each entity is (number opened-or-not children parent) ;;;;;;;
 
-(defun wl-meaning-of-mark (mark)
-  (if (not (elmo-folder-plugged-p wl-summary-buffer-folder-name))
-      (cond 
-       ((string= mark wl-summary-unread-cached-mark)
-	'unread)
-       ((string= mark wl-summary-important-mark)
-	'important))
-    (cond 
-     ((string= mark wl-summary-new-mark)
-      'new)
-     ((or (string= mark wl-summary-unread-uncached-mark)
-	  (string= mark wl-summary-unread-cached-mark))
-      'unread)
-     ((string= mark wl-summary-important-mark)
-      'important))))
-  
-(defun wl-thread-next-mark-p (mark next)
-  (cond ((not (elmo-folder-plugged-p wl-summary-buffer-folder-name))
-	 (or (string= mark wl-summary-unread-cached-mark)
-	     (string= mark wl-summary-important-mark)))
-	((eq next 'new)
-	 (string= mark wl-summary-new-mark))
-	((eq next 'unread)
-	 (or (string= mark wl-summary-unread-uncached-mark)
-	     (string= mark wl-summary-unread-cached-mark)
-	     (string= mark wl-summary-new-mark)))
-	(t 
-	 (or (string= mark wl-summary-unread-uncached-mark)
-	     (string= mark wl-summary-unread-cached-mark)
-	     (string= mark wl-summary-new-mark)
-	     (string= mark wl-summary-important-mark)))))
-
-(defun wl-thread-next-failure-mark-p (mark next)
-  (cond ((not (elmo-folder-plugged-p wl-summary-buffer-folder-name))
-	 (string= mark wl-summary-unread-cached-mark))
-	((or (eq next 'new)
-	     (eq next 'unread))
-	 (or (string= mark wl-summary-unread-uncached-mark)
-	     (string= mark wl-summary-unread-cached-mark)
-	     (string= mark wl-summary-new-mark)
-	     (string= mark wl-summary-important-mark)))
-	(t t)))
-
 (defun wl-thread-resume-entity (fld)
   (let (entities top-list)
-    (setq entities (wl-summary-load-file-object 
+    (setq entities (wl-summary-load-file-object
 		    (expand-file-name wl-thread-entity-file
-				      (elmo-msgdb-expand-path fld))))
+				      (elmo-folder-msgdb-path fld))))
     (setq top-list
 	  (wl-summary-load-file-object
 	   (expand-file-name wl-thread-entity-list-file
-			     (elmo-msgdb-expand-path fld))))
-    (current-buffer)
+			     (elmo-folder-msgdb-path fld))))
     (message "Resuming thread structure...")
     ;; set obarray value.
     (setq wl-thread-entity-hashtb (elmo-make-hash (* (length entities) 2)))
-    (mapcar 
-     '(lambda (x)
-       (elmo-set-hash-val (format "#%d" (car x))
-			  x
-			  wl-thread-entity-hashtb))
-     entities)
     ;; set buffer local variables.
     (setq wl-thread-entities entities)
     (setq wl-thread-entity-list top-list)
-    (message "Resuming thread structure...done.")))
+    (while entities
+      (elmo-set-hash-val (format "#%d" (car (car entities))) (car entities)
+			 wl-thread-entity-hashtb)
+      (setq entities (cdr entities)))
+    (wl-thread-make-number-list)
+    (message "Resuming thread structure...done")))
+
+(defun wl-thread-make-number-list ()
+  "Make `wl-summary-buffer-number-list', a list of message numbers."
+  (let* ((node (wl-thread-get-entity (car wl-thread-entity-list)))
+	 (children (wl-thread-entity-get-children node))
+	 parent sibling)
+    (setq wl-summary-buffer-number-list (list (car wl-thread-entity-list)))
+    (while children
+      (wl-thread-entity-make-number-list-from-children
+       (wl-thread-get-entity (car children)))
+      (setq children (cdr children)))
+    (while node
+      (setq parent (wl-thread-entity-get-parent-entity node)
+	    sibling (wl-thread-entity-get-younger-brothers
+		     node parent))
+      (while sibling
+	(wl-thread-entity-make-number-list-from-children
+	 (wl-thread-get-entity (car sibling)))
+	(setq sibling (cdr sibling)))
+      (setq node parent))
+    (setq wl-summary-buffer-number-list (nreverse
+					 wl-summary-buffer-number-list))))
+
+(defun wl-thread-entity-make-number-list-from-children (entity)
+  (let ((msgs (list (car entity)))
+	msgs-stack children)
+    (while msgs
+      (setq wl-summary-buffer-number-list (cons (car entity)
+						wl-summary-buffer-number-list))
+      (setq msgs (cdr msgs))
+      (setq children (wl-thread-entity-get-children entity))
+      (if children
+	  (progn
+	    (wl-push msgs msgs-stack)
+	    (setq msgs children))
+	(unless msgs
+	  (while (and (null msgs) msgs-stack)
+	    (setq msgs (wl-pop msgs-stack)))))
+      (setq entity (wl-thread-get-entity (car msgs))))))
 
 (defun wl-thread-save-entity (dir)
   (wl-thread-save-entities dir)
@@ -127,7 +119,8 @@
 (defun wl-thread-save-top-list (dir)
   (let ((top-file (expand-file-name wl-thread-entity-list-file dir))
 	(entity wl-thread-entity-list)
-	(tmp-buffer (get-buffer-create " *wl-thread-save-top-list*")))
+	(tmp-buffer (get-buffer-create " *wl-thread-save-top-list*"))
+	print-length)
     (save-excursion
       (set-buffer tmp-buffer)
       (erase-buffer)
@@ -140,7 +133,8 @@
 (defun wl-thread-save-entities (dir)
   (let ((top-file (expand-file-name wl-thread-entity-file dir))
 	(entities wl-thread-entities)
-	(tmp-buffer (get-buffer-create " *wl-thread-save-entities*")))
+	(tmp-buffer (get-buffer-create " *wl-thread-save-entities*"))
+	print-length print-level)
     (save-excursion
       (set-buffer tmp-buffer)
       (erase-buffer)
@@ -158,13 +152,14 @@
   (nth 2 entity))
 (defsubst wl-thread-entity-get-parent (entity)
   (nth 3 entity))
+(defsubst wl-thread-entity-get-linked (entity)
+  (nth 4 entity))
 
-(defsubst wl-thread-create-entity (num parent &optional opened)
-  (list num (or opened wl-thread-insert-opened) nil parent))
+(defsubst wl-thread-create-entity (num parent &optional opened linked)
+  (list num (or opened wl-thread-insert-opened) nil parent linked))
 
 (defsubst wl-thread-get-entity (num)
   (and num
-       (boundp (intern (format "#%d" num) wl-thread-entity-hashtb))
        (elmo-get-hash-val (format "#%d" num) wl-thread-entity-hashtb)))
 
 (defsubst wl-thread-entity-set-parent (entity parent)
@@ -174,18 +169,44 @@
 (defsubst wl-thread-entity-set-children (entity children)
   (setcar (cddr entity) children))
 
+(defsubst wl-thread-entity-set-linked (entity linked)
+  (if (cddddr entity)
+      (setcar (cddddr entity) linked)
+    (nconc entity (list linked)))
+  entity)
+
+(defsubst wl-thread-reparent-children (children parent)
+  (while children
+    (wl-thread-entity-set-parent
+     (wl-thread-get-entity (car children)) parent)
+    (wl-thread-entity-set-linked
+     (wl-thread-get-entity (car children)) t)
+    (setq children (cdr children))))
+
 (defsubst wl-thread-entity-insert-as-top (entity)
   (when (and entity
 	     (car entity))
-    (setq wl-thread-entity-list (append wl-thread-entity-list
-					(list (car entity))))
+    (wl-append wl-thread-entity-list (list (car entity)))
     (setq wl-thread-entities (cons entity wl-thread-entities))
+    (setq wl-summary-buffer-number-list
+	  (nconc wl-summary-buffer-number-list (list (car entity))))
     (elmo-set-hash-val (format "#%d" (car entity)) entity
 		       wl-thread-entity-hashtb)))
 
 (defsubst wl-thread-entity-insert-as-children (to entity)
-  (let ((children (nth 2 to)))
-    (setcar (cddr to) (wl-append children 
+  (let ((children (wl-thread-entity-get-children to))
+	curp curc)
+    (setq curp to)
+    (elmo-list-insert wl-summary-buffer-number-list
+ 		      (wl-thread-entity-get-number entity)
+ 		      (progn
+ 			(while (setq curc
+ 				     (wl-thread-entity-get-children curp))
+ 			  (setq curp (wl-thread-get-entity
+ 				      (nth (- (length curc) 1)
+ 					   curc))))
+ 			(wl-thread-entity-get-number curp)))
+    (setcar (cddr to) (wl-append children
 				 (list (car entity))))
     (setq wl-thread-entities (cons entity wl-thread-entities))
     (elmo-set-hash-val (format "#%d" (car entity)) entity
@@ -224,7 +245,7 @@
        (wl-push msgs msgs-stack)
        (setq msgs children))
      (setq entity (wl-thread-get-entity (car msgs))))
-   ret-val))  
+   ret-val))
 
 (defsubst wl-thread-entity-get-parent-entity (entity)
   (wl-thread-get-entity (wl-thread-entity-get-parent entity)))
@@ -237,454 +258,165 @@
     cur-entity))
 
 (defun wl-thread-entity-parent-invisible-p (entity)
-  "If parent of ENTITY is invisible, the top invisible ancestor entity of 
+  "If parent of ENTITY is invisible, the top invisible ancestor entity of
 ENTITY is returned."
   (let ((cur-entity entity)
-	ret-val)
+	top)
     (catch 'done
-      (while (setq cur-entity (wl-thread-entity-get-parent-entity 
+      (while (setq cur-entity (wl-thread-entity-get-parent-entity
 			       cur-entity))
 	(if (null (wl-thread-entity-get-number cur-entity))
-	    ;; top!!
-	    (progn
-	      ;;(setq ret-val nil)
-	      (throw 'done nil))
+	    (throw 'done nil)
 	  (when (not (wl-thread-entity-get-opened cur-entity))
-	    ;; not opened!!
-	    (setq ret-val cur-entity)))))
-    ;; top of closed entity in the path.
-    ret-val))
-
-(defun wl-thread-entity-get-mark (number)
-  (let ((mark-alist (elmo-msgdb-get-mark-alist wl-summary-buffer-msgdb))
-	mark)
-    (setq mark (cadr (assq number mark-alist)))
-    (if (string= mark wl-summary-read-uncached-mark)
-	()
-      mark)))
-
-(defun wl-thread-meaning-alist-get-result (meaning-alist)
-  (let ((malist meaning-alist)
-	ret-val)
-    (catch 'done
-      (while malist
-	(if (setq ret-val (cdr (car malist)))
-	    (throw 'done ret-val))
-	(setq malist (cdr malist))))))
-
-(defun wl-thread-entity-check-prev-mark (entity prev-marks)
-  "Check prev mark. Result is stored in PREV-MARK."
-  (let ((msgs (list (car entity)))
-	(succeed-list (car prev-marks))
-	(failure-list (cdr prev-marks))
-	msgs-stack children
-	mark meaning success failure parents)
-  (catch 'done
-    (while msgs
-      (if (and (not (memq (car msgs) parents))
-	       (setq children (reverse (wl-thread-entity-get-children entity))))
-	  (progn
-	    (wl-append parents (list (car msgs)))
-	    (wl-push msgs msgs-stack)
-	    (setq msgs children))
-	(if (setq mark (wl-thread-entity-get-mark (car entity)))
-	    (if (setq meaning (wl-meaning-of-mark mark))
-		(if (setq success (assq meaning succeed-list))
-		    (progn
-		      (setcdr success entity)
-		      (throw 'done nil))
-		  (setq failure (assq meaning failure-list))
-		  (unless (cdr failure)		      
-		    (setcdr (assq meaning failure-list) entity)))))
-	(setq msgs (cdr msgs)))
-	(unless msgs
-	  (while (and (null msgs) msgs-stack)
-	    (setq msgs (wl-pop msgs-stack))))
-      (setq entity (wl-thread-get-entity (car msgs)))))))
+	    (setq top cur-entity)))))
+    top))
 
-(defun wl-thread-entity-check-next-mark (entity next-marks)
-  "Check next mark. Result is stored in NEXT-MARK."
-  (let ((msgs (list (car entity)))
-	(succeed-list (car next-marks))
-	(failure-list (cdr next-marks))
-	msgs-stack children
-	mark meaning success failure)
-  (catch 'done
-    (while msgs
-      (if (setq mark (wl-thread-entity-get-mark (car entity)))
-	  (if (setq meaning (wl-meaning-of-mark mark))
-	      (if (setq success (assq meaning succeed-list))
-		  (progn
-		    (setcdr success entity)
-		    (throw 'done nil))
-		(setq failure (assq meaning failure-list))
-		(unless (cdr failure)		      
-		  (setcdr (assq meaning failure-list) entity)))))
-      (setq msgs (cdr msgs))
-      (setq children (wl-thread-entity-get-children entity))
-      (if children
-	  (progn
-	    (wl-push msgs msgs-stack)
-	    (setq msgs children))
-	(unless msgs
-	  (while (and (null msgs) msgs-stack)
-	    (setq msgs (wl-pop msgs-stack)))))
-      (setq entity (wl-thread-get-entity (car msgs)))))))
+(defun wl-thread-entity-get-nearly-older-brother (entity &optional parent)
+  (let ((brothers (wl-thread-entity-get-older-brothers entity parent)))
+    (when brothers
+      (car (last brothers)))))
 
 (defun wl-thread-entity-get-older-brothers (entity &optional parent)
-  (let* ((parent (or parent
-		     (wl-thread-entity-get-parent-entity entity)))
-	 (brothers (wl-thread-entity-get-children parent))
-	 ret-val)
+  (let ((parent (or parent
+		    (wl-thread-entity-get-parent-entity entity)))
+	brothers ret-val)
     (if parent
-	brothers
+	(setq brothers (wl-thread-entity-get-children parent))
       (setq brothers wl-thread-entity-list))
-    (catch 'done
-      (while brothers
-	(if (not (eq (wl-thread-entity-get-number entity)
-		     (car brothers)))
-	    (wl-append ret-val (list (car brothers)))
-	  (throw 'done ret-val))
-	(setq brothers (cdr brothers))))))
+    (while (and brothers
+		(not (eq (wl-thread-entity-get-number entity)
+			 (car brothers))))
+      (wl-append ret-val (list (car brothers)))
+      (setq brothers (cdr brothers)))
+    ret-val))
 
 (defun wl-thread-entity-get-younger-brothers (entity &optional parent)
   (let* ((parent (or parent
 		     (wl-thread-entity-get-parent-entity entity)))
 	 (brothers (wl-thread-entity-get-children parent)))
-    (if parent 
+    (if parent
 	(cdr (memq (wl-thread-entity-get-number entity)
 		   brothers))
       ;; top!!
       (cdr (memq (car entity) wl-thread-entity-list)))))
 
-(defun wl-thread-entity-check-prev-mark-from-older-brother (entity prev-marks)
-  (let* (older-brother parent)
-  (catch 'done
-    (while entity
-      (setq older-brother
-	    (reverse (wl-thread-entity-get-older-brothers entity)))
-      ;; check itself
-      (let ((succeed-list (car prev-marks))
- 	    (failure-list (cdr prev-marks))
- 	    mark meaning success failure)
- 	(if (setq mark (wl-thread-entity-get-mark (car entity)))
- 	    (if (setq meaning (wl-meaning-of-mark mark))
- 		(if (setq success (assq meaning succeed-list))
- 		    (progn
- 		      (setcdr success entity)
- 		      (throw 'done nil))
- 		  (setq failure (assq meaning failure-list))
- 		  (unless (cdr failure)		      
- 		    (setcdr (assq meaning failure-list) entity))))))
-      ;; check older brothers
-      (while older-brother
-	(wl-thread-entity-check-prev-mark (wl-thread-get-entity
-					   (car older-brother))
-					  prev-marks)
-	(if (wl-thread-meaning-alist-get-result
-	     (car prev-marks))
-	    (throw 'done nil))
-	(setq older-brother (cdr older-brother)))
-      (setq entity (wl-thread-entity-get-parent-entity entity))))))
-
-(defun wl-thread-entity-get-prev-marked-entity (entity prev-marks)
-  (let ((older-brothers (reverse 
-			 (wl-thread-entity-get-older-brothers entity)))
-	marked)
-    (or (catch 'done
-	  (while older-brothers
-	    (wl-thread-entity-check-prev-mark 
-	     (wl-thread-get-entity (car older-brothers)) prev-marks)
-	    (if (setq marked
-		      (wl-thread-meaning-alist-get-result
-		       (car prev-marks)))
-		(throw 'done marked))
-	    (setq older-brothers (cdr older-brothers))))
-	(wl-thread-entity-check-prev-mark-from-older-brother
-	 (wl-thread-entity-get-parent-entity entity) prev-marks)
-	(if (setq marked
-		  (wl-thread-meaning-alist-get-result
-		   (car prev-marks)))
-	    marked
-	  (if (setq marked
-		    (wl-thread-meaning-alist-get-result
-		     (cdr prev-marks)))
-	      marked)))))
-
-(defun wl-thread-get-prev-unread (msg &optional hereto)
-  (let ((cur-entity (wl-thread-get-entity msg))
-	(prev-marks (cond ((eq wl-summary-move-order 'new)
-			   (cons (list (cons 'new nil))
-				 (list (cons 'unread nil)
-				       (cons 'important nil))))
-			  ((eq wl-summary-move-order 'unread)
-			   (cons (list (cons 'unread nil)
-				       (cons 'new nil))
-				 (list (cons 'important nil))))
-			  (t 
-			   (cons (list (cons 'unread nil)
-				       (cons 'new nil)
-				       (cons 'important nil))
-				 nil))))
-	mark ret-val)
-    (if hereto
-	(when (wl-thread-next-mark-p (setq mark
-					   (wl-thread-entity-get-mark 
-					    (car cur-entity)))
-				     (caaar prev-marks))
-	  ;;(setq mark (cons cur-entity
-	  ;;(wl-thread-entity-get-mark cur-entity)))
-	  (setq ret-val msg)))
-    (when (and (not ret-val)
-	       (or (setq cur-entity 
-			 (wl-thread-entity-get-prev-marked-entity
-			  cur-entity prev-marks))
-		   (and hereto mark)))
-      (if (and hereto
-	       (catch 'done
-		 (let ((success-list (car prev-marks)))
-		   (while success-list
-		     (if (cdr (car success-list))
-			 (throw 'done nil))
-		     (setq success-list (cdr success-list)))
-		   t))
-	       (wl-thread-next-failure-mark-p mark (caaar prev-marks)))
-	  (setq ret-val msg)
-	(when cur-entity
-	  (setq ret-val (car cur-entity)))))
-    ret-val))
-    
-(defun wl-thread-jump-to-prev-unread (&optional hereto)
-  "If prev unread is a children of a closed message, 
-the closed parent will be opened."
-  (interactive "P")
-  (let ((msg (wl-thread-get-prev-unread
-	      (wl-summary-message-number) hereto)))
-    (when msg
-      (wl-thread-entity-force-open (wl-thread-get-entity msg))
-      (wl-summary-jump-to-msg msg)
-      t)))
-
 (defun wl-thread-jump-to-msg (&optional number)
   (interactive)
-  (let ((num (or number 
-                 (string-to-int 
-                  (read-from-minibuffer "Jump to Message(No.): ")))))
+  (let ((num (or number
+		 (string-to-int
+		  (read-from-minibuffer "Jump to Message(No.): ")))))
     (wl-thread-entity-force-open (wl-thread-get-entity num))
     (wl-summary-jump-to-msg num)))
 
-(defun wl-thread-get-next-unread (msg &optional hereto)
-  (let ((cur-entity (wl-thread-get-entity msg))
-	(next-marks (cond ((not (elmo-folder-plugged-p
-				 wl-summary-buffer-folder-name))
-			   (cons (list (cons 'unread nil))
-				 (list (cons 'important nil))))
-			  ((eq wl-summary-move-order 'new)
-			   (cons (list (cons 'new nil))
-				 (list (cons 'unread nil)
-				       (cons 'important nil))))
-			  ((eq wl-summary-move-order 'unread)
-			   (cons (list (cons 'unread nil)
-				       (cons 'new nil))
-				 (list (cons 'important nil))))
-			  (t 
-			   (cons (list (cons 'unread nil)
-				       (cons 'new nil)
-				       (cons 'important nil))
-				 nil))))
-	mark ret-val)
-    (if hereto
-	(when (wl-thread-next-mark-p (setq mark
-					   (wl-thread-entity-get-mark 
-					    (car cur-entity)))
-				     (caaar next-marks))
-	  (setq ret-val msg)))
-    (when (and (not ret-val)
-	       (or (setq cur-entity 
-			 (wl-thread-entity-get-next-marked-entity 
-			  cur-entity next-marks))
-		   (and hereto mark)))
-      (if (and hereto
-	       ;; all success-list is nil
-	       (catch 'done
-		 (let ((success-list (car next-marks)))
-		   (while success-list
-		     (if (cdr (car success-list))
-		       (throw 'done nil))
-		     (setq success-list (cdr success-list)))
-		   t))
-	       (wl-thread-next-failure-mark-p mark (caaar next-marks)))
-	  (setq ret-val msg)
-	(when cur-entity
-	  (setq ret-val (car cur-entity)))))
-    ret-val))
-
-(defun wl-thread-jump-to-next-unread (&optional hereto)
-  "If next unread is a children of a closed message, 
-the closed parent will be opened."
-  (interactive "P")
-  (let ((msg (wl-thread-get-next-unread
-	      (wl-summary-message-number) hereto)))
-    (when msg
-      (wl-thread-entity-force-open (wl-thread-get-entity msg))
-      (wl-summary-jump-to-msg msg)
-      t)))
-
 (defun wl-thread-close-all ()
   "Close all top threads."
   (interactive)
   (message "Closing all threads...")
-  (let ((entities wl-thread-entity-list)
-	(cur 0)
-	(len (length wl-thread-entity-list)))
-    (while entities
-      (when (and (wl-thread-entity-get-opened (wl-thread-get-entity
-					       (car entities)))
-		 (wl-thread-entity-get-children (wl-thread-get-entity
-						 (car entities))))
-	(wl-summary-jump-to-msg (car entities))
-	(wl-thread-open-close)
-	(setq cur (1+ cur))
-	(elmo-display-progress
-	 'wl-thread-close-all "Closing all threads..." 
-	 (/ (* cur 100) len)))
-      (setq entities (cdr entities))))
-  (elmo-display-progress 'wl-thread-close-all
-			 "Closing all threads..."
-			 100)  
-  (message "Closing all threads...done.")
-  (goto-char (point-max)))
+  (save-excursion
+    (let ((entities wl-thread-entity-list)
+	  (cur 0)
+	  (len (length wl-thread-entity-list)))
+      (while entities
+	(when (and (wl-thread-entity-get-opened (wl-thread-get-entity
+						 (car entities)))
+		   (wl-thread-entity-get-children (wl-thread-get-entity
+						   (car entities))))
+	  (wl-summary-jump-to-msg (car entities))
+	  (wl-thread-open-close))
+	(when (> len elmo-display-progress-threshold)
+	  (setq cur (1+ cur))
+	  (if (or (zerop (% cur 5)) (= cur len))
+	      (elmo-display-progress
+	       'wl-thread-close-all "Closing all threads..."
+	       (/ (* cur 100) len))))
+	(setq entities (cdr entities)))))
+  (message "Closing all threads...done"))
 
 (defun wl-thread-open-all ()
   "Open all threads."
   (interactive)
   (message "Opening all threads...")
-  (let ((entities wl-thread-entity-list)
-	(cur 0)
-	(len (length wl-thread-entity-list)))
-    (while entities
-      (if (not (wl-thread-entity-get-opened (wl-thread-get-entity
-					     (car entities))))
-	  (wl-thread-entity-force-open (wl-thread-get-entity
-					(car entities))))
-      (setq cur (1+ cur))
-      (elmo-display-progress
-       'wl-thread-open-all "Opening all threads..." 
-       (/ (* cur 100) len))
-      (setq entities (cdr entities))))
-  (message "Opening all threads...done.")
-  (goto-char (point-max)))
+  (save-excursion
+    (goto-char (point-min))
+    (let ((len (count-lines (point-min) (point-max)))
+	  (cur 0)
+	  entity)
+      (while (not (eobp))
+	(if (wl-thread-entity-get-opened
+	     (setq entity (wl-thread-get-entity
+			   (wl-summary-message-number))))
+	    (forward-line 1)
+	  (wl-thread-force-open)
+	  (wl-thread-goto-bottom-of-sub-thread))
+	(when (> len elmo-display-progress-threshold)
+	  (setq cur (1+ cur))
+	  (elmo-display-progress
+	   'wl-thread-open-all "Opening all threads..."
+	   (/ (* cur 100) len)))))
+    ;; Make sure to be 100%.
+    (elmo-display-progress
+     'wl-thread-open-all "Opening all threads..."
+     100))
+  (message "Opening all threads...done"))
 
 (defun wl-thread-open-all-unread ()
   (interactive)
-  (let ((mark-alist (elmo-msgdb-get-mark-alist wl-summary-buffer-msgdb))
-	mark)
-    (while mark-alist
-      (if (setq mark (nth 1 (car mark-alist)))
-	  (if (or (string= mark wl-summary-unread-uncached-mark)
-		  (string= mark wl-summary-unread-cached-mark)
-		  (string= mark wl-summary-new-mark)
-		  (string= mark wl-summary-important-mark))
-	      (wl-thread-entity-force-open (wl-thread-get-entity
-					    (nth 0 (car mark-alist))))))
-      (setq mark-alist (cdr mark-alist)))))
-
-;;; a subroutine for wl-thread-entity-get-next-marked-entity.
-(defun wl-thread-entity-check-next-mark-from-younger-brother 
-  (entity next-marks)
-  (let* (parent younger-brother)
-    (catch 'done
-      (while entity
-	(setq parent (wl-thread-entity-get-parent-entity entity)
-	      younger-brother 
-	      (wl-thread-entity-get-younger-brothers entity parent))
-	;; check my brother!
-	(while younger-brother
-	  (wl-thread-entity-check-next-mark 
-	   (wl-thread-get-entity (car younger-brother))
-	   next-marks)
-	  (if  (wl-thread-meaning-alist-get-result
-		(car next-marks))
-	      (throw 'done nil))
-	  (setq younger-brother (cdr younger-brother)))
-	(setq entity parent)))))
-
-(defun wl-thread-entity-get-next-marked-entity (entity next-marks)
-  (let ((children (wl-thread-entity-get-children entity))
-	marked)
-    (or (catch 'done
-	  (while children
-	    (wl-thread-entity-check-next-mark 
-	     (wl-thread-get-entity (car children)) next-marks)
-	    (if (setq marked 
-		      (wl-thread-meaning-alist-get-result 
-		       (car next-marks)))
-		(throw 'done marked))
-	    (setq children (cdr children))))
-	;; check younger brother
-	(wl-thread-entity-check-next-mark-from-younger-brother
-	 entity next-marks)
-	(if (setq marked 
-		  (wl-thread-meaning-alist-get-result 
-		   (car next-marks)))
-	    marked
-	  (if (setq marked
-		    (wl-thread-meaning-alist-get-result
-		     (cdr next-marks)))
-	      marked)))))
-
-(defun wl-thread-update-line-msgs (msgs)
-  (wl-delete-all-overlays)
-  (while msgs
-    (setq msgs
-	  (wl-thread-update-line-on-buffer (car msgs) nil msgs))))
-
-(defsubst wl-thread-update-line-on-buffer-sub (entity &optional msg parent-msg)
-  (let ((number-alist (elmo-msgdb-get-number-alist wl-summary-buffer-msgdb))
-	(overview (elmo-msgdb-get-overview wl-summary-buffer-msgdb))
-	(mark-alist (elmo-msgdb-get-mark-alist wl-summary-buffer-msgdb))
-	(buffer-read-only nil)
-	(inhibit-read-only t)
-	;;(parent-msg parent-msg)
-	overview-entity
-	temp-mark
-	children-num
-	summary-line)
-    (if (memq msg wl-summary-buffer-delete-list)
-	(setq temp-mark "D"))
-    (if (memq msg wl-summary-buffer-target-mark-list)
-	(setq temp-mark "*"))
-    (if (assq msg wl-summary-buffer-refile-list)
-	(setq temp-mark "o"))
-    (if (assq msg wl-summary-buffer-copy-list)
-	(setq temp-mark "O"))
-    (unless temp-mark
-      (setq temp-mark (wl-summary-get-score-mark msg)))
-    ;(setq parent-entity (wl-thread-entity-get-parent-entity entity))
-    (unless parent-msg
-      (setq parent-msg (wl-thread-entity-get-parent entity)))
-    ;;(setq children (wl-thread-entity-get-children entity))
-    (setq children-num (wl-thread-entity-get-children-num entity))
-    (setq overview-entity
-	  (elmo-msgdb-search-overview-entity msg 
-					     number-alist overview))
-    ;;(wl-delete-all-overlays)
-    (when overview-entity
-      (setq summary-line 
-	    (wl-summary-overview-create-summary-line
-	     msg
-	     overview-entity
-	     (assoc			; parent-entity
-	      (cdr (assq parent-msg
-			 number-alist)) overview)
-	     nil
-	     mark-alist
-	     (if wl-thread-insert-force-opened
-		 nil
-	       (if (not (wl-thread-entity-get-opened entity))
-		   (or children-num)))
-	     temp-mark entity))
-      (wl-summary-insert-line summary-line))))
+  (dolist (number (elmo-folder-list-flagged wl-summary-buffer-elmo-folder
+					    'digest 'in-msgdb))
+    (wl-thread-entity-force-open (wl-thread-get-entity number))))
+
+(defsubst wl-thread-maybe-get-children-num (msg)
+  (let ((entity (wl-thread-get-entity msg)))
+    (if (not (wl-thread-entity-get-opened entity))
+	(wl-thread-entity-get-children-num entity))))
+
+(defsubst wl-thread-update-line-on-buffer-sub (entity msg &optional parent-msg)
+  (let* ((entity (or entity (wl-thread-get-entity msg)))
+	 (parent-msg (or parent-msg (wl-thread-entity-get-parent entity)))
+	 (buffer-read-only nil)
+	 (inhibit-read-only t)
+	 message-entity temp-mark summary-line invisible-top dest-pair)
+    (if (wl-thread-delete-line-from-buffer msg)
+	(progn
+	  (cond
+	   ((memq msg wl-summary-buffer-target-mark-list)
+	    (setq temp-mark "*"))
+	   ((setq temp-mark (wl-summary-registered-temp-mark msg))
+	    (setq dest-pair (cons (nth 0 temp-mark)(nth 2 temp-mark))
+		  temp-mark (nth 1 temp-mark)))
+	   (t (setq temp-mark (wl-summary-get-score-mark msg))))
+	  (when (setq message-entity
+		      (elmo-message-entity wl-summary-buffer-elmo-folder
+					   msg))
+	    (wl-summary-insert-line
+	     (wl-summary-create-line
+	      message-entity
+	      (elmo-message-entity wl-summary-buffer-elmo-folder
+				   parent-msg)
+	      temp-mark
+	      (elmo-message-flags wl-summary-buffer-elmo-folder
+				  msg)
+	      (elmo-message-cached-p wl-summary-buffer-elmo-folder
+				     msg)
+	      (if wl-thread-insert-force-opened
+		  nil
+		(wl-thread-maybe-get-children-num msg))
+	      (wl-thread-make-indent-string entity)
+	      (wl-thread-entity-get-linked entity)))
+	    (if dest-pair
+		(wl-summary-print-argument (car dest-pair)
+					   (cdr dest-pair)))))
+      ;; insert thread (moving thread)
+      (if (not (setq invisible-top
+		     (wl-thread-entity-parent-invisible-p entity)))
+	  (wl-summary-update-thread
+	   (elmo-message-entity wl-summary-buffer-elmo-folder msg)
+	   entity
+	   (and parent-msg
+		(elmo-message-entity wl-summary-buffer-elmo-folder
+				     parent-msg)))
+	;; currently invisible.. update closed line.
+	(wl-thread-update-children-number invisible-top)))))
 
 (defun wl-thread-update-line-on-buffer (&optional msg parent-msg updates)
   (interactive)
@@ -693,27 +425,49 @@ the closed parent will be opened."
    (while msgs
     (setq msg (wl-pop msgs))
     (setq updates (and updates (delete msg updates)))
-    (when (wl-thread-delete-line-from-buffer msg)
-      (setq entity (wl-thread-get-entity msg))
-      (wl-thread-update-line-on-buffer-sub entity msg parent-msg)
-      ;;
-      (setq children (wl-thread-entity-get-children entity))
-      (if children
-	  ;; update children
-	  (when (wl-thread-entity-get-opened entity)
-	    (wl-push msgs msgs-stack)
-	    (setq parent-msg msg
-		  msgs children))
-	(unless msgs
-	  (while (and (null msgs) msgs-stack)
-	    (setq msgs (wl-pop msgs-stack)))
-	  (when msgs
-	    (setq parent-msg
-		  (wl-thread-entity-get-number
-		   (wl-thread-entity-get-parent-entity
-		    (wl-thread-get-entity (car msgs))))))))))
+    (setq entity (wl-thread-get-entity msg))
+    (wl-thread-update-line-on-buffer-sub entity msg parent-msg)
+    ;;
+    (setq children (wl-thread-entity-get-children entity))
+    (if children
+	;; update children
+	(when (wl-thread-entity-get-opened entity)
+	  (wl-push msgs msgs-stack)
+	  (setq parent-msg msg
+		msgs children))
+      (unless msgs
+	(while (and (null msgs) msgs-stack)
+	  (setq msgs (wl-pop msgs-stack)))
+	(when msgs
+	  (setq parent-msg
+		(wl-thread-entity-get-number
+		 (wl-thread-entity-get-parent-entity
+		  (wl-thread-get-entity (car msgs)))))))))
    updates))
 
+(defun wl-thread-update-line-msgs (msgs &optional no-msg)
+  (wl-delete-all-overlays)
+  (let ((i 0)
+	(updates msgs)
+	len)
+;;; (while msgs
+;;;   (setq updates
+;;;	    (append updates
+;;;		    (wl-thread-get-children-msgs (car msgs))))
+;;;   (setq msgs (cdr msgs)))
+;;; (setq updates (elmo-uniq-list updates))
+    (setq len (length updates))
+    (while updates
+      (wl-thread-update-line-on-buffer-sub nil (car updates))
+      (setq updates (cdr updates))
+      (when (and (not no-msg)
+		 (> len elmo-display-progress-threshold))
+	(setq i (1+ i))
+	(if (or (zerop (% i 5)) (= i len))
+	    (elmo-display-progress
+	     'wl-thread-update-line-msgs "Updating deleted thread..."
+	     (/ (* i 100) len)))))))
+
 (defun wl-thread-delete-line-from-buffer (msg)
   "Simply delete msg line."
   (let (beg)
@@ -726,127 +480,185 @@ the closed parent will be opened."
       nil)))
 
 (defun wl-thread-cleanup-symbols (msgs)
-  (let (sym)
+  (let (entity)
     (while msgs
-      ;; free symbol.
-      (when (boundp (setq sym (intern (format "#%d" (car msgs))
-				      wl-thread-entity-hashtb)))
+      (when (setq entity (wl-thread-get-entity (car msgs)))
 	;; delete entity.
-	(setq wl-thread-entities 
-	      (delq (wl-thread-get-entity (car msgs))
-		    wl-thread-entities))
-	(makunbound sym))
+	(setq wl-thread-entities (delq entity wl-thread-entities))
+	;; free symbol.
+	(elmo-clear-hash-val (format "#%d" (car msgs))
+			     wl-thread-entity-hashtb))
       (setq msgs (cdr msgs)))))
 
-(defun wl-thread-delete-message (msg &optional update)
+(defun wl-thread-get-exist-children (msg &optional include-self)
+  (let ((msgs (list msg))
+	msgs-stack children
+	entity ret-val)
+    (while msgs
+      (setq children (wl-thread-entity-get-children
+		      (setq entity (wl-thread-get-entity (car msgs)))))
+      (when (elmo-message-entity wl-summary-buffer-elmo-folder (car msgs))
+	(wl-append ret-val (list (car msgs)))
+	(setq children nil))
+      (setq msgs (cdr msgs))
+      (if (null children)
+	  (while (and (null msgs) msgs-stack)
+	    (setq msgs (wl-pop msgs-stack)))
+	(wl-push msgs msgs-stack)
+	(setq msgs children)))
+    (unless include-self (setq ret-val (delq msg ret-val)))
+    ret-val))
+
+(defun wl-thread-delete-message (msg &optional deep update)
   "Delete MSG from entity and buffer."
   (save-excursion
-    (let* ((entity (wl-thread-get-entity msg))
-	   children children2
-	   older-brothers younger-brothers ;;brothers
-	   parent num)
+    (let ((entity (wl-thread-get-entity msg))
+	  top-child top-entity update-msgs invisible-top)
+      (setq wl-summary-buffer-number-list
+	    (delq msg wl-summary-buffer-number-list))	      
       (when entity
-	(setq parent (wl-thread-entity-get-parent-entity entity))
-	(if parent 
-	    (progn
+	(let ((parent (wl-thread-entity-get-parent-entity entity)))
+	  (if parent
 	      ;; has parent.
-	      ;;(setq brothers (wl-thread-entity-get-children parent))
-	      (setq older-brothers (wl-thread-entity-get-older-brothers
-				    entity parent))
-	      (setq younger-brothers (wl-thread-entity-get-younger-brothers
-				      entity parent))
-	      ;; 
-	      (setq children (wl-thread-entity-get-children entity))
-	      (mapcar '(lambda (x)
-			(wl-thread-entity-set-parent 
-			 (wl-thread-get-entity x)
-			 (wl-thread-entity-get-number parent)))
-		      children)
-	      (wl-thread-entity-set-children
-	       parent
-	       (append
-		(append
-		 older-brothers
-		 children)
-		younger-brothers)))
-	  ;; top...children becomes top.
-	  (mapcar '(lambda (x)
-		    (wl-thread-entity-set-parent (wl-thread-get-entity x)
-						 nil))
-		  (setq children (wl-thread-entity-get-children entity)))
-	  ;; delete myself from top list.
-	  (setq older-brothers (wl-thread-entity-get-older-brothers
-				entity nil))
-	  (setq younger-brothers (wl-thread-entity-get-younger-brothers
-				  entity nil))
-	  (setq wl-thread-entity-list
-		(append (append older-brothers children) 
-			younger-brothers))))
-      
-      ;; delete myself from buffer.
-      (unless (wl-thread-delete-line-from-buffer msg)
-	;; jump to suitable point.
-	;; just upon the oldest younger-brother of my top.
-	(let ((younger-bros (wl-thread-entity-get-younger-brothers
-			     (wl-thread-entity-get-top-entity entity)
-			     nil)))
-	  (if younger-bros
-	      (wl-summary-jump-to-msg (car younger-bros))
-	    (goto-char (point-max)))) ; no younger brothers.
-	)
-      ;; insert children if thread is closed.
-      (when (not (wl-thread-entity-get-opened entity))
-	(setq children2 children)
-	(while children2
-	  (wl-thread-insert-entity 0 ; no mean now...
-				   (wl-thread-get-entity 
-				    (car children2))
-				   entity nil)
-	  (setq children2 (cdr children2))))
+	      (let (children
+		    (older-brothers (wl-thread-entity-get-older-brothers
+				     entity parent))
+		    (younger-brothers (wl-thread-entity-get-younger-brothers
+				       entity parent)))
+		(unless deep
+		  (setq children (wl-thread-entity-get-children entity))
+		  (wl-thread-reparent-children
+		   children (wl-thread-entity-get-number parent))
+		  (setq update-msgs
+			(apply (function nconc)
+			       update-msgs
+			       (mapcar
+				(function
+				 (lambda (message)
+				   (wl-thread-get-children-msgs message t)))
+				children))))
+		(wl-thread-entity-set-children
+		 parent (append older-brothers children younger-brothers))
+		;; If chidren and younger-brothers do not exist,
+		;; update nearly older brother.
+		(when (and older-brothers
+			   (not younger-brothers)
+			   (not children))
+		  (wl-append
+		   update-msgs
+		   (wl-thread-get-children-msgs (car (last older-brothers))))))
+	    ;; top...oldest child becomes top.
+	    (unless deep
+	      (let ((children (wl-thread-entity-get-children entity)))
+		(when children
+		  (setq top-child (car children)
+			children (cdr children))
+		  (setq top-entity (wl-thread-get-entity top-child))
+		  (wl-thread-entity-set-parent top-entity nil)
+		  (wl-thread-entity-set-linked top-entity nil)
+		  (wl-append update-msgs
+			     (wl-thread-get-children-msgs top-child t)))
+		(when children
+		  (wl-thread-entity-set-children
+		   top-entity
+		   (append
+		    (wl-thread-entity-get-children top-entity)
+		    children))
+		  (wl-thread-reparent-children children top-child)
+		  (wl-append update-msgs children))))
+	    ;; delete myself from top list.
+	    (let ((match (memq msg wl-thread-entity-list)))
+	      (when match
+		(if top-child
+		    (setcar match top-child)
+		  (setq wl-thread-entity-list
+			(delq msg wl-thread-entity-list))))))))
+      ;;
+      (if deep
+	  ;; delete thread on buffer
+	  (when (wl-summary-jump-to-msg msg)
+	    (let ((beg (point)))
+	      (wl-thread-goto-bottom-of-sub-thread)
+	      (delete-region beg (point))))
+	;; delete myself from buffer.
+	(unless (wl-thread-delete-line-from-buffer msg)
+	  ;; jump to suitable point.
+	  ;; just upon the oldest younger-brother of my top.
+	  (setq invisible-top
+		(car (wl-thread-entity-parent-invisible-p entity)))
+	  (if invisible-top
+	      (progn
+		(wl-append update-msgs (list invisible-top))
+		(wl-summary-jump-to-msg invisible-top))
+	    (goto-char (point-max))))
+
+	;; insert children if thread is closed or delete top.
+	(when (or top-child
+		  (not (wl-thread-entity-get-opened entity)))
+	  (let (next-top insert-msgs ent grandchildren)
+	    (if top-child
+		(progn
+		  (setq insert-msgs (wl-thread-get-exist-children
+				     top-child 'include-self))
+		  (setq next-top (car insert-msgs))
+		  (setq ent (wl-thread-get-entity next-top))
+		  (when (and
+			 (wl-thread-entity-get-opened entity) ;; open
+			 (not (wl-thread-entity-get-opened ent)) ;; close
+			 (setq grandchildren
+			       (wl-thread-entity-get-children ent))
+			 (wl-summary-jump-to-msg next-top))
+		    (forward-line 1)
+		    (setq insert-msgs (append (cdr insert-msgs) grandchildren)))
+		  (when top-entity (wl-thread-entity-set-opened top-entity t))
+		  (when ent (wl-thread-entity-set-opened ent t)))
+	      (when (not invisible-top)
+		(setq insert-msgs (wl-thread-get-exist-children msg))
+		;; First msg always opened, because first msg maybe becomes top.
+		(if (setq ent (wl-thread-get-entity (car insert-msgs)))
+		    (wl-thread-entity-set-opened ent t))))
+	    ;; insert children
+	    (while insert-msgs
+	      ;; if no exists in summary, insert entity.
+	      (when (and (car insert-msgs)
+			 (not (wl-summary-jump-to-msg (car insert-msgs))))
+		(setq ent (wl-thread-get-entity (car insert-msgs)))
+		(wl-thread-insert-entity 0 ; no mean now...
+					 ent entity nil))
+	      (setq insert-msgs (cdr insert-msgs))))))
       (if update
- 	  ;; modify buffer.
- 	  (progn
- 	    (if parent
- 		;; update parent on buffer.
- 		(progn
-		  (setq num (wl-thread-entity-get-number parent))
- 		  (when num
- 		    (wl-thread-update-line-on-buffer num)))
- 	      ;; update children lines on buffer.
- 	      (mapcar '(lambda (x)
-			(wl-thread-update-line-on-buffer 
- 			 x
- 			 (wl-thread-entity-get-number parent)))
- 		      children)))
- 	;; don't update buffer
-	(if parent
- 	    ;; return parent number
- 	    (list (wl-thread-entity-get-number parent))
- 	  children))
-       ;; update the indent string 
-;	    (wl-summary-goto-top-of-current-thread)
-;	    (setq beg (point))
-;	    (wl-thread-goto-bottom-of-sub-thread)
-;	    (wl-thread-update-indent-string-region beg (point)))
-      )))
- 
-  
-(defun wl-thread-insert-message (overview-entity overview mark-alist
-				 msg parent-msg &optional update)
+	  ;; modify buffer.
+	  (while update-msgs
+	    (wl-thread-update-line-on-buffer-sub nil (pop update-msgs)))
+	;; don't update buffer
+	update-msgs)))) ; return value
+
+(defun wl-thread-insert-message (message-entity
+				 msg parent-msg &optional update linked)
   "Insert MSG to the entity.
-When optional argument UPDATE is non-nil, 
+When optional argument UPDATE is non-nil,
 Message is inserted to the summary buffer."
   (let ((parent (wl-thread-get-entity parent-msg))
 	child-entity invisible-top)
-;; Update the thread view...not implemented yet.
-;    (when force-insert
-;      (if parent
-;	  (wl-thread-entity-force-open parent))
+;;; Update the thread view...not implemented yet.
+;;;  (when force-insert
+;;;    (if parent
+;;;	  (wl-thread-entity-force-open parent))
+    (when (and wl-summary-max-thread-depth parent)
+      (let ((cur parent)
+	    (depth 0))
+	(while cur
+	  (incf depth)
+	  (setq cur (wl-thread-entity-get-parent-entity cur)))
+	(when (> depth wl-summary-max-thread-depth)
+	  (setq parent nil
+		parent-msg nil))))
     (if parent
 	;; insert as children.
 	(wl-thread-entity-insert-as-children
 	 parent
-	 (setq child-entity (wl-thread-create-entity msg (nth 0 parent))))
+	 (setq child-entity (wl-thread-create-entity
+			     msg (nth 0 parent) nil linked)))
       ;; insert as top message.
       (wl-thread-entity-insert-as-top
        (wl-thread-create-entity msg nil)))
@@ -855,78 +667,52 @@ Message is inserted to the summary buffer."
 		       (wl-thread-entity-parent-invisible-p child-entity)))
 	    ;; visible.
 	    (progn
-	      (wl-summary-update-thread 
-	       overview-entity
-	       overview 
-	       mark-alist 
+	      (wl-summary-update-thread
+	       message-entity
 	       child-entity
-	       (elmo-msgdb-overview-get-entity-by-number overview parent-msg))
+	       (elmo-message-entity wl-summary-buffer-elmo-folder
+				    parent-msg))
 	      (when parent
 		;; use thread structure.
-		(wl-thread-entity-get-number
-		 (wl-thread-entity-get-top-entity parent)))); return value;
-;; 	      (setq beg (point))
-;; 	      (wl-thread-goto-bottom-of-sub-thread)
-;; 	      (wl-thread-update-indent-string-region beg (point)))
+		;;(wl-thread-entity-get-nearly-older-brother
+		;; child-entity parent))) ; return value
+ 		(wl-thread-entity-get-number parent))) ; return value
+;;; 	      (setq beg (point))
+;;; 	      (wl-thread-goto-bottom-of-sub-thread)
+;;; 	      (wl-thread-update-indent-string-region beg (point)))
 	  ;; currently invisible.. update closed line.
 	  (wl-thread-update-children-number invisible-top)
 	  nil))))
 
+(defun wl-thread-get-parent-list (msgs)
+  (let* ((msgs2 msgs)
+	 myself)
+    (while msgs2
+      (setq myself (car msgs2)
+	    msgs2 (cdr msgs2))
+      (while (not (eq myself (car msgs2)))
+	(if (wl-thread-descendant-p myself (car msgs2))
+	    (setq msgs (delq (car msgs2) msgs)))
+	(setq msgs2 (or (cdr msgs2) msgs)))
+      (setq msgs2 (cdr msgs2)))
+    msgs))
+
 (defun wl-thread-update-indent-string-thread (top-list)
-  (let (beg)
+  (let ((top-list (wl-thread-get-parent-list top-list))
+	beg)
     (while top-list
-      (wl-summary-jump-to-msg (car top-list))
-      (setq beg (point))
-      (wl-thread-goto-bottom-of-sub-thread)
-      (wl-thread-update-indent-string-region beg (point))
+      (when (car top-list)
+	(wl-summary-jump-to-msg (car top-list))
+	(setq beg (point))
+	(wl-thread-goto-bottom-of-sub-thread)
+	(wl-thread-update-indent-string-region beg (point)))
       (setq top-list (cdr top-list)))))
 
 (defun wl-thread-update-children-number (entity)
   "Update the children number."
-  (save-excursion
-    (wl-summary-jump-to-msg (wl-thread-entity-get-number entity))
-    (beginning-of-line)
-    (let ((text-prop (get-text-property (point) 'face))
-	  from from-end beg str)
-      (cond 
-       ((looking-at (concat "^" wl-summary-buffer-number-regexp 
-			    "..../..\(.*\)..:.. ["
-			    wl-thread-indent-regexp
-			    "]*\\[\\+\\([0-9]+\\):"))
-	(delete-region (match-beginning 1)(match-end 1))
-	(goto-char (match-beginning 1))
-	(setq str (format "%s" (wl-thread-entity-get-children-num entity)))
-	(if wl-summary-highlight
-	    (put-text-property 0 (length str) 'face text-prop str))
-	(insert str))
-       ((looking-at (concat "^" wl-summary-buffer-number-regexp 
-			    "..../..\(.*\)..:.. ["
-			    wl-thread-indent-regexp
-			    "]*\\["))
-	(goto-char (match-end 0))
-	(setq beg (current-column))
-	(setq from-end (save-excursion 
-			 (move-to-column (+ 1 beg wl-from-width))
-			 (point)))
-	(setq from (buffer-substring (match-end 0) from-end))
-	(delete-region (match-end 0) from-end)
-	(setq str (wl-set-string-width 
-		   (1+ wl-from-width)
-		   (format 
-		    "+%s:%s" 
-		    (wl-thread-entity-get-children-num
-		     entity)
-		    from)))
-	(if wl-summary-highlight
-	    (put-text-property 0 (length str) 'face text-prop str))
-	(insert str)
-	(condition-case nil ; it's dangerous, so ignore error.
-	    (run-hooks 'wl-thread-update-children-number-hook)
-	  (error
-	   (ding)
-	   (message "Error in wl-thread-update-children-number-hook."))))))))
-
-;; 
+  (wl-thread-update-line-on-buffer (wl-thread-entity-get-number entity)))
+
+;;
 ;; Thread oriented commands.
 ;;
 (defun wl-thread-call-region-func (func &optional arg)
@@ -942,66 +728,6 @@ Message is inserted to the summary buffer."
   (interactive "P")
   (wl-thread-call-region-func 'wl-summary-prefetch-region arg))
 
-(defun wl-thread-msg-mark-as-read (msg)
-  "Set mark as read for invisible MSG. Modeline is not changed."
-  (let* ((msgdb wl-summary-buffer-msgdb)
-	 (mark-alist (elmo-msgdb-get-mark-alist msgdb))
-	 cur-mark)
-    (setq cur-mark (cadr (assq msg mark-alist)))
-    (cond ((or (string= cur-mark wl-summary-new-mark)
-	       (string= cur-mark wl-summary-unread-uncached-mark))
-	   ;; N,U -> u or " "
-	   (setq mark-alist
-		 (elmo-msgdb-mark-set mark-alist
-				      msg
-				      (if (elmo-use-cache-p
-					   wl-summary-buffer-folder-name
-					   msg)
-					  wl-summary-read-uncached-mark)))
-	   (elmo-msgdb-set-mark-alist msgdb mark-alist)
-	   (wl-summary-set-mark-modified))
-	  ((string= cur-mark wl-summary-unread-cached-mark)
-	   ;; "!" -> " "
-	   (setq mark-alist (elmo-msgdb-mark-set mark-alist msg nil))
-	   (elmo-msgdb-set-mark-alist msgdb mark-alist)
-	   (wl-summary-set-mark-modified)))))
-
-(defun wl-thread-msg-mark-as-unread (msg)
-  "Set mark as unread for invisible MSG. Modeline is not changed."
-  (let* ((msgdb wl-summary-buffer-msgdb)
-	 (mark-alist (elmo-msgdb-get-mark-alist msgdb))
-	 cur-mark)
-    (setq cur-mark (cadr (assq msg mark-alist)))
-    (cond ((string= cur-mark wl-summary-read-uncached-mark)
-	   ;; u -> U
-	   (setq mark-alist
-		 (elmo-msgdb-mark-set mark-alist
-				      msg
-				      wl-summary-unread-uncached-mark))
-	   (elmo-msgdb-set-mark-alist msgdb mark-alist)
-	   (wl-summary-set-mark-modified))
-	  ((null cur-mark)
-	   ;; " " -> "!"
-	   (setq mark-alist (elmo-msgdb-mark-set mark-alist msg 
-				      wl-summary-unread-cached-mark))
-	   (elmo-msgdb-set-mark-alist msgdb mark-alist)
-	   (wl-summary-set-mark-modified)))))
-
-(defun wl-thread-msg-mark-as-important (msg)
-  "Set mark as important for invisible MSG. Modeline is not changed."
-  (let* ((msgdb wl-summary-buffer-msgdb)
-	 (mark-alist (elmo-msgdb-get-mark-alist msgdb))
-	 cur-mark)
-    (setq cur-mark (cadr (assq msg mark-alist)))
-    (setq mark-alist
-	  (elmo-msgdb-mark-set mark-alist
-			       msg
-			       (if (string= cur-mark wl-summary-important-mark)
-				   nil
-				 wl-summary-important-mark)))
-    (elmo-msgdb-set-mark-alist msgdb mark-alist)
-    (wl-summary-set-mark-modified)))
-
 (defun wl-thread-mark-as-read (&optional arg)
   (interactive "P")
   (wl-thread-call-region-func 'wl-summary-mark-as-read-region arg))
@@ -1014,36 +740,13 @@ Message is inserted to the summary buffer."
   (interactive "P")
   (wl-thread-call-region-func 'wl-summary-mark-as-important-region arg))
 
-(defun wl-thread-copy (&optional arg)
-  (interactive "P")
-  (wl-thread-call-region-func 'wl-summary-copy-region arg))
-
-(defun wl-thread-refile (&optional arg)
-  (interactive "P")
-  (condition-case err
-      (progn
-	(wl-thread-call-region-func 'wl-summary-refile-region arg)
-	(if arg
-	    (wl-summary-goto-top-of-current-thread))
-	(wl-thread-goto-bottom-of-sub-thread))
-    (error
-     (elmo-display-error err t)
-     nil)))
-	
-(defun wl-thread-delete (&optional arg)
+(defun wl-thread-set-flags (&optional arg)
   (interactive "P")
-  (wl-thread-call-region-func 'wl-summary-delete-region arg)
-  (if arg
-      (wl-summary-goto-top-of-current-thread))
-  (if (not wl-summary-move-direction-downward)
-      (wl-summary-prev)
-    (wl-thread-goto-bottom-of-sub-thread)
-    (if wl-summary-buffer-disp-msg
-	(wl-summary-redisplay))))
+  (wl-thread-call-region-func 'wl-summary-set-flags-region arg))
 
-(defun wl-thread-target-mark (&optional arg)
+(defun wl-thread-mark-as-answered (&optional arg)
   (interactive "P")
-  (wl-thread-call-region-func 'wl-summary-target-mark-region arg))
+  (wl-thread-call-region-func 'wl-summary-mark-as-answered-region arg))
 
 (defun wl-thread-unmark (&optional arg)
   (interactive "P")
@@ -1081,60 +784,52 @@ Message is inserted to the summary buffer."
 	(cur 0))
     (wl-delete-all-overlays)
     (while elist
-      (wl-thread-insert-entity 
+      (wl-thread-insert-entity
        0
        (wl-thread-get-entity (car elist))
        nil
        len)
-      (setq cur (1+ cur))
-      (elmo-display-progress
-       'wl-thread-insert-top "Inserting thread..."
-       (/ (* cur 100) len))
-      (setq elist (cdr elist)))))
+      (setq elist (cdr elist))
+      (when (> len elmo-display-progress-threshold)
+	(setq cur (1+ cur))
+	(if (or (zerop (% cur 2)) (= cur len))
+	    (elmo-display-progress
+	     'wl-thread-insert-top "Inserting message..."
+	     (/ (* cur 100) len)))))))
 
 (defsubst wl-thread-insert-entity-sub (indent entity parent-entity all)
-  (let ((number-alist (elmo-msgdb-get-number-alist wl-summary-buffer-msgdb))
-	(overview (elmo-msgdb-get-overview wl-summary-buffer-msgdb))
-	(mark-alist (elmo-msgdb-get-mark-alist wl-summary-buffer-msgdb))
-	msg-num
-	overview-entity
+  (let (msg-num
+	message-entity
 	temp-mark
-	children-num
-	summary-line
-	score)
+	summary-line)
     (when (setq msg-num (wl-thread-entity-get-number entity))
       (unless all ; all...means no temp-mark.
-	(cond ((memq msg-num wl-summary-buffer-delete-list)
-	       (setq temp-mark "D"))
-	      ((memq msg-num wl-summary-buffer-target-mark-list)
+	(cond ((memq msg-num wl-summary-buffer-target-mark-list)
 	       (setq temp-mark "*"))
-	      ((assq msg-num wl-summary-buffer-refile-list)
-	       (setq temp-mark "o"))
-	      ((assq msg-num wl-summary-buffer-copy-list)
-	       (setq temp-mark "O"))))
+	      ((setq temp-mark (wl-summary-registered-temp-mark msg-num))
+	       (setq temp-mark (nth 1 temp-mark)))))
       (unless temp-mark
 	(setq temp-mark (wl-summary-get-score-mark msg-num)))
-      (setq children-num (wl-thread-entity-get-children-num entity))
-      (setq overview-entity 
-	    (elmo-msgdb-search-overview-entity
-	     (nth 0 entity) number-alist overview))
-      ;;(wl-delete-all-overlays)
-      (when overview-entity
-	(setq summary-line 
-	      (wl-summary-overview-create-summary-line
-	       msg-num
-	       overview-entity
-	       (assoc  ; parent-entity
-		(cdr (assq (nth 0 parent-entity)
-			   number-alist)) overview)
-	       (1+ indent)
-	       mark-alist
-	       (if wl-thread-insert-force-opened
-		   nil
-		 (if (not (wl-thread-entity-get-opened entity))
-		     (or children-num)))
-	       temp-mark entity))
-	(wl-summary-insert-line summary-line)))))
+      (setq message-entity
+	    (elmo-message-entity wl-summary-buffer-elmo-folder
+				 (nth 0 entity)))
+;;;   (wl-delete-all-overlays)
+      (when message-entity
+	(wl-summary-insert-line
+	 (wl-summary-create-line
+	  message-entity
+	  (elmo-message-entity wl-summary-buffer-elmo-folder
+			       (nth 0 parent-entity))
+	  temp-mark
+	  (elmo-message-flags wl-summary-buffer-elmo-folder
+			      msg-num)
+	  (elmo-message-cached-p wl-summary-buffer-elmo-folder
+				 msg-num)
+	  (if wl-thread-insert-force-opened
+	      nil
+	    (wl-thread-maybe-get-children-num msg-num))
+	  (wl-thread-make-indent-string entity)
+	  (wl-thread-entity-get-linked entity)))))))
 
 (defun wl-thread-insert-entity (indent entity parent-entity all)
   "Insert thread entity in current buffer."
@@ -1175,15 +870,15 @@ Message is inserted to the summary buffer."
 	    (throw 'done t)))
       nil)))
 
-; (defun wl-thread-goto-bottom-of-sub-thread ()
-;   (interactive)
-;   (let ((depth (wl-thread-get-depth-of-current-line)))
-;     (forward-line 1)
-;     (while (and (not (eobp))
-; 		(> (wl-thread-get-depth-of-current-line) 
-; 		   depth))
-;       (forward-line 1))
-;     (beginning-of-line)))
+;; (defun wl-thread-goto-bottom-of-sub-thread ()
+;;   (interactive)
+;;   (let ((depth (wl-thread-get-depth-of-current-line)))
+;;     (forward-line 1)
+;;     (while (and (not (eobp))
+;; 		(> (wl-thread-get-depth-of-current-line)
+;; 		   depth))
+;;       (forward-line 1))
+;;     (beginning-of-line)))
 
 (defun wl-thread-goto-bottom-of-sub-thread (&optional msg)
   (interactive)
@@ -1193,40 +888,42 @@ Message is inserted to the summary buffer."
       (forward-line 1))
     (beginning-of-line)))
 
-(defun wl-thread-remove-destination-region (beg end)
+(defun wl-thread-remove-argument-region (beg end)
   (save-excursion
     (save-restriction
       (narrow-to-region beg end)
       (goto-char (point-min))
       (while (not (eobp))
-	(let ((num (wl-summary-message-number)))
-	  (if (assq num wl-summary-buffer-refile-list)
-	      (wl-summary-remove-destination)))
+	(wl-summary-remove-argument)
 	(forward-line 1)))))
 
-(defun wl-thread-print-destination-region (beg end)
-  (if (or wl-summary-buffer-refile-list
-	  wl-summary-buffer-copy-list)
+(defun wl-thread-print-argument-region (beg end)
+  (if wl-summary-buffer-temp-mark-list
       (save-excursion
 	(save-restriction
 	  (narrow-to-region beg end)
 	  (goto-char (point-min))
 	  (while (not (eobp))
 	    (let ((num (wl-summary-message-number))
-		  pair)
-	      (if (or (setq pair (assq num wl-summary-buffer-refile-list))
-		      (setq pair (assq num wl-summary-buffer-copy-list)))
-		  (wl-summary-print-destination (car pair) (cdr pair))))
+		  temp-mark pair)
+	      (when (and (setq temp-mark
+			       (wl-summary-registered-temp-mark num))
+			 (nth 2 temp-mark)
+			 (setq pair (cons (nth 0 temp-mark)(nth 2 temp-mark))))
+		(wl-summary-print-argument (car pair) (cdr pair))))
 	    (forward-line 1))))))
 
-(defsubst wl-thread-get-children-msgs (msg)
+(defsubst wl-thread-get-children-msgs (msg &optional visible-only)
   (let ((msgs (list msg))
 	msgs-stack children
-	ret-val)
+	entity ret-val)
     (while msgs
       (wl-append ret-val (list (car msgs)))
       (setq children (wl-thread-entity-get-children
-		      (wl-thread-get-entity (car msgs))))
+		      (setq entity (wl-thread-get-entity (car msgs)))))
+      (if (and visible-only
+	       (not (wl-thread-entity-get-opened entity)))
+	  (setq children nil))
       (setq msgs (cdr msgs))
       (if (null children)
 	  (while (and (null msgs) msgs-stack)
@@ -1237,20 +934,20 @@ Message is inserted to the summary buffer."
 
 (defun wl-thread-get-children-msgs-uncached (msg &optional uncached-marks)
   (let ((children-msgs (wl-thread-get-children-msgs msg))
-	(mark-alist (elmo-msgdb-get-mark-alist wl-summary-buffer-msgdb))
-	(number-alist (elmo-msgdb-get-number-alist wl-summary-buffer-msgdb))
-	mark
-	uncached-list)
+	mark uncached-list)
     (while children-msgs
       (if (and (not (eq msg (car children-msgs))) ; except itself
 	       (or (and uncached-marks
-			(setq mark (cadr (assq (car children-msgs)
-					       mark-alist)))
+			(setq mark (wl-summary-message-mark
+				    wl-summary-buffer-elmo-folder
+				    (car children-msgs)))
 			(member mark uncached-marks))
 		   (and (not uncached-marks)
-			(null (elmo-cache-exists-p
-			       (cdr (assq (car children-msgs)
-					  number-alist)))))))
+			(null (elmo-file-cache-exists-p
+			       (elmo-message-field
+				wl-summary-buffer-elmo-folder
+				(car children-msgs)
+				'message-id))))))
 	  (wl-append uncached-list (list (car children-msgs))))
       (setq children-msgs (cdr children-msgs)))
     uncached-list))
@@ -1279,17 +976,17 @@ Message is inserted to the summary buffer."
     (beginning-of-line)
     (setq beg (point))
     (wl-thread-goto-bottom-of-sub-thread)
-    (wl-thread-remove-destination-region beg 
-					 (point))
+    (wl-thread-remove-argument-region beg
+				      (point))
     (forward-char -1)	;; needed for mouse-face.
     (delete-region beg (point))
     (wl-thread-insert-entity (- depth 1)
-			     entity 
+			     entity
 			     (wl-thread-get-entity
 			      (nth 3 entity))
 			     nil)
     (delete-char 1) ; delete '\n'
-    (wl-thread-print-destination-region beg (point))))
+    (wl-thread-print-argument-region beg (point))))
 
 (defun wl-thread-open (entity)
   (let (depth beg)
@@ -1299,25 +996,25 @@ Message is inserted to the summary buffer."
     (end-of-line)
     (delete-region beg (point))
     (wl-thread-entity-set-opened entity t)
-    (wl-thread-insert-entity depth ;(- depth 1) 
-			     entity 
+    (wl-thread-insert-entity depth ;(- depth 1)
+			     entity
 			     (wl-thread-get-entity
 			      (nth 3 entity)) nil)
     (delete-char 1) ; delete '\n'
-    (wl-thread-print-destination-region beg (point))))
+    (wl-thread-print-argument-region beg (point))))
 
 (defun wl-thread-open-close (&optional force-open)
   (interactive "P")
   (when (eq wl-summary-buffer-view 'thread)
-    ;(if (equal wl-thread-top-entity '(nil t nil nil))
-    ;(error "There's no thread structure."))
+;;; (if (equal wl-thread-top-entity '(nil t nil nil))
+;;;	(error "There's no thread structure"))
     (save-excursion
       (let ((inhibit-read-only t)
 	    (buffer-read-only nil)
-	    (wl-thread-insert-force-opened 
-	     (or wl-thread-insert-force-opened 
+	    (wl-thread-insert-force-opened
+	     (or wl-thread-insert-force-opened
 		 force-open))
-	    msg entity beg depth parent)
+	    msg entity parent)
 	(setq msg (wl-summary-message-number))
 	(setq entity (wl-thread-get-entity msg))
 	(if (wl-thread-entity-get-opened entity)
@@ -1340,31 +1037,27 @@ Message is inserted to the summary buffer."
 	      (wl-summary-jump-to-msg msg)
 	      (wl-thread-close
 	       (wl-thread-get-entity (wl-summary-message-number)))))))
+      (when wl-summary-lazy-highlight
+	(wl-highlight-summary-window))
       (wl-summary-set-message-modified)
       (set-buffer-modified-p nil))))
-  
 
 (defun wl-thread-get-depth-of-current-line ()
-  (interactive)
-  (save-excursion
-    (beginning-of-line)
-    (let ((depth 0))
-      (if (re-search-forward (concat "^" wl-summary-buffer-number-regexp 
-				     "..../..\(.*\)..:.. ")
-			     nil t)
-	  (while (string-match wl-thread-indent-regexp 
-			       (char-to-string
-				(char-after (point))))
-	    (setq depth (1+ depth))
-	    (forward-char)))
-      (/ depth wl-thread-indent-level-internal))))
-
+  (let ((entity (wl-thread-get-entity (wl-summary-message-number)))
+	(depth 0)
+	number)
+    (while (setq number (wl-thread-entity-get-parent entity))
+      (incf depth)
+      (setq entity (wl-thread-get-entity number)))
+    depth))
+  
 (defun wl-thread-update-indent-string-region (beg end)
   (interactive "r")
   (save-excursion
     (goto-char beg)
     (while (< (point) end)
-      (wl-thread-update-indent-string)
+      (save-excursion
+	(wl-thread-update-line-on-buffer-sub nil (wl-summary-message-number)))
       (forward-line 1))))
 
 (defsubst wl-thread-make-indent-string (entity)
@@ -1373,57 +1066,75 @@ Message is inserted to the summary buffer."
 	(space-str (wl-repeat-string wl-thread-space-str-internal
 				     (- wl-thread-indent-level-internal 1)))
 	parent)
-    (when (wl-thread-entity-get-number 
+    (when (wl-thread-entity-get-number
 	   (setq parent (wl-thread-entity-get-parent-entity cur)))
       (if (wl-thread-entity-get-younger-brothers cur)
 	  (setq ret-val wl-thread-have-younger-brother-str-internal)
 	(setq ret-val wl-thread-youngest-child-str-internal))
-      (setq ret-val (concat ret-val 
+      (setq ret-val (concat ret-val
 			    (wl-repeat-string
 			     wl-thread-horizontal-str-internal
 			     (- wl-thread-indent-level-internal 1))))
       (setq cur parent)
-      (while (wl-thread-entity-get-number 
+      (while (wl-thread-entity-get-number
 	      (wl-thread-entity-get-parent-entity cur))
 	(if (wl-thread-entity-get-younger-brothers cur)
 	    (setq ret-val (concat wl-thread-vertical-str-internal
 				  space-str
 				  ret-val))
-	  (setq ret-val (concat wl-thread-space-str-internal 
+	  (setq ret-val (concat wl-thread-space-str-internal
 				space-str
 				ret-val)))
 	(setq cur (wl-thread-entity-get-parent-entity cur))))
     ret-val))
 
-(defun wl-thread-update-indent-string ()
-  "Update indent string of current line."
+(defun wl-thread-set-parent (&optional parent-number)
+  "Set current message's parent interactively."
   (interactive)
-  (save-excursion
-    (beginning-of-line)
-    (let ((inhibit-read-only t)
-	  (buffer-read-only nil)
-	  thr-str)
-      (when (looking-at (concat "^ *\\([0-9]+\\)"
-				"..../..\(.*\)..:.. \\("
-				wl-highlight-thread-indent-string-regexp
-				"\\)\\["))
-	(goto-char (match-beginning 2))
-	(delete-region (match-beginning 2)
-		       (match-end 2))
-	(setq thr-str
-	      (wl-thread-make-indent-string 
-	       (wl-thread-get-entity (string-to-int (wl-match-buffer 1)))))
-	(if (and wl-summary-width 
-		 wl-summary-indent-length-limit
-		 (< wl-summary-indent-length-limit
-		    (string-width thr-str)))
-	    (setq thr-str (wl-set-string-width 
-			   wl-summary-indent-length-limit
-			   thr-str)))
-	(insert thr-str)
-	(if wl-summary-highlight
-	    (wl-highlight-summary-current-line))))))
-
-(provide 'wl-thread)
+  (let ((number (wl-summary-message-number))
+	(dst-parent (if (interactive-p)
+			(read-from-minibuffer "Parent Message (No.): ")))
+	entity dst-parent-entity src-parent children
+	update-msgs
+	buffer-read-only)
+    (if (string= dst-parent "")
+	(setq dst-parent nil)
+      (if (interactive-p)
+	  (setq dst-parent (string-to-int dst-parent))
+	(setq dst-parent parent-number)))
+    (if (and dst-parent
+	     (memq dst-parent (wl-thread-get-children-msgs number)))
+	(error "Parent is children or myself"))
+    (setq entity (wl-thread-get-entity number))
+    (when (and number entity)
+      ;; delete thread
+      (setq update-msgs (wl-thread-delete-message number 'deep))
+      ;; insert as child at new parent
+      (setq dst-parent-entity (wl-thread-get-entity dst-parent))
+      (if dst-parent-entity
+	  (progn
+	    (if (setq children
+		      (wl-thread-entity-get-children dst-parent-entity))
+		(wl-append update-msgs
+			   (wl-thread-get-children-msgs
+			    (car (last children)) t)))
+	    (wl-thread-entity-set-children
+	     dst-parent-entity
+	     (append children (list number)))
+	    (wl-thread-entity-set-linked entity t))
+	;; insert as top
+	(wl-append wl-thread-entity-list (list number))
+	(wl-thread-entity-set-linked entity nil))
+
+      ;; update my thread
+      (wl-append update-msgs (wl-thread-get-children-msgs number t))
+      (setq update-msgs (elmo-uniq-list update-msgs))
+      (wl-thread-entity-set-parent entity dst-parent)
+      ;; update thread on buffer
+      (wl-thread-make-number-list)
+      (wl-thread-update-line-msgs update-msgs t))))
+
+(require 'product)
+(product-provide (provide 'wl-thread) (require 'wl-version))
 
 ;;; wl-thread.el ends here