wl/wl-thread.el

   1 ;;; wl-thread.el --- Thread display modules for Wanderlust.
   2
   3 ;; Copyright (C) 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
   4 ;; Copyright (C) 1998,1999,2000 Masahiro MURATA  <muse@ba2.so-net.ne.jp>
   5
   6 ;; Author: Yuuichi Teranishi <teranisi@gohome.org>
   7 ;;      Masahiro MURATA  <muse@ba2.so-net.ne.jp>
   8 ;; Keywords: mail, net news
   9
  10 ;; This file is part of Wanderlust (Yet Another Message Interface on Emacsen).
  11
  12 ;; This program is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16 ;;
  17 ;; This program is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21 ;;
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 ;; Boston, MA 02111-1307, USA.
  26 ;;
  27
  28 ;;; Commentary:
  29 ;;
  30
  31 ;;; Code:
  32 ;;
  33
  34 (require 'wl-summary)
  35 (require 'wl-highlight)
  36 (eval-when-compile (require 'cl))
  37
  38 ;; buffer local variables.
  39 ;;(defvar wl-thread-top-entity '(nil t nil nil)) ; top entity
  40 (defvar wl-thread-tops nil)             ; top number list (number)
  41 (defvar wl-thread-entities nil)
  42 (defvar wl-thread-entity-list nil)      ; entity list
  43 (defvar wl-thread-entity-hashtb nil)    ; obarray
  44
  45 (make-variable-buffer-local 'wl-thread-entity-hashtb)
  46 (make-variable-buffer-local 'wl-thread-entities)     ; ".wl-thread-entity"
  47 (make-variable-buffer-local 'wl-thread-entity-list)  ; ".wl-thread-entity-list"
  48
  49 ;;; global flag
  50 (defvar wl-thread-insert-force-opened nil)
  51
  52 ;;;;;; each entity is (number opened-or-not children parent) ;;;;;;;
  53
  54 (defun wl-thread-resume-entity (fld)
  55   (let (entities top-list)
  56     (setq entities (wl-summary-load-file-object
  57                     (expand-file-name wl-thread-entity-file
  58                                       (elmo-folder-msgdb-path fld))))
  59     (setq top-list
  60           (wl-summary-load-file-object
  61            (expand-file-name wl-thread-entity-list-file
  62                              (elmo-folder-msgdb-path fld))))
  63     (message "Resuming thread structure...")
  64     ;; set obarray value.
  65     (setq wl-thread-entity-hashtb (elmo-make-hash (* (length entities) 2)))
  66     ;; set buffer local variables.
  67     (setq wl-thread-entities entities)
  68     (setq wl-thread-entity-list top-list)
  69     (while entities
  70       (elmo-set-hash-val (format "#%d" (car (car entities))) (car entities)
  71                          wl-thread-entity-hashtb)
  72       (setq entities (cdr entities)))
  73     (wl-thread-make-number-list)
  74     (message "Resuming thread structure...done")))
  75
  76 (defun wl-thread-make-number-list ()
  77   "Make `wl-summary-buffer-number-list', a list of message numbers."
  78   (let* ((node (wl-thread-get-entity (car wl-thread-entity-list)))
  79          (children (wl-thread-entity-get-children node))
  80          parent sibling)
  81     (setq wl-summary-buffer-number-list (list (car wl-thread-entity-list)))
  82     (while children
  83       (wl-thread-entity-make-number-list-from-children
  84        (wl-thread-get-entity (car children)))
  85       (setq children (cdr children)))
  86     (while node
  87       (setq parent (wl-thread-entity-get-parent-entity node)
  88             sibling (wl-thread-entity-get-younger-brothers
  89                      node parent))
  90       (while sibling
  91         (wl-thread-entity-make-number-list-from-children
  92          (wl-thread-get-entity (car sibling)))
  93         (setq sibling (cdr sibling)))
  94       (setq node parent))
  95     (setq wl-summary-buffer-number-list (nreverse
  96                                          wl-summary-buffer-number-list))))
  97
  98 (defun wl-thread-entity-make-number-list-from-children (entity)
  99   (let ((msgs (list (car entity)))
 100         msgs-stack children)
 101     (while msgs
 102       (setq wl-summary-buffer-number-list (cons (car entity)
 103                                                 wl-summary-buffer-number-list))
 104       (setq msgs (cdr msgs))
 105       (setq children (wl-thread-entity-get-children entity))
 106       (if children
 107           (progn
 108             (wl-push msgs msgs-stack)
 109             (setq msgs children))
 110         (unless msgs
 111           (while (and (null msgs) msgs-stack)
 112             (setq msgs (wl-pop msgs-stack)))))
 113       (setq entity (wl-thread-get-entity (car msgs))))))
 114
 115 (defun wl-thread-save-entity (dir)
 116   (wl-thread-save-entities dir)
 117   (wl-thread-save-top-list dir))
 118
 119 (defun wl-thread-save-top-list (dir)
 120   (let ((top-file (expand-file-name wl-thread-entity-list-file dir))
 121         (entity wl-thread-entity-list)
 122         (tmp-buffer (get-buffer-create " *wl-thread-save-top-list*")))
 123     (save-excursion
 124       (set-buffer tmp-buffer)
 125       (erase-buffer)
 126       (when (file-writable-p top-file)
 127         (prin1 entity tmp-buffer)
 128         (princ "\n" tmp-buffer)
 129         (write-region (point-min) (point-max) top-file nil 'no-msg)
 130         (kill-buffer tmp-buffer)))))
 131
 132 (defun wl-thread-save-entities (dir)
 133   (let ((top-file (expand-file-name wl-thread-entity-file dir))
 134         (entities wl-thread-entities)
 135         (tmp-buffer (get-buffer-create " *wl-thread-save-entities*")))
 136     (save-excursion
 137       (set-buffer tmp-buffer)
 138       (erase-buffer)
 139       (when (file-writable-p top-file)
 140         (prin1 entities tmp-buffer)
 141         (princ "\n" tmp-buffer)
 142         (write-region (point-min) (point-max) top-file nil 'no-msg)
 143         (kill-buffer tmp-buffer)))))
 144
 145 (defsubst wl-thread-entity-get-number (entity)
 146   (nth 0 entity))
 147 (defsubst wl-thread-entity-get-opened (entity)
 148   (nth 1 entity))
 149 (defsubst wl-thread-entity-get-children (entity)
 150   (nth 2 entity))
 151 (defsubst wl-thread-entity-get-parent (entity)
 152   (nth 3 entity))
 153 (defsubst wl-thread-entity-get-linked (entity)
 154   (nth 4 entity))
 155
 156 (defsubst wl-thread-create-entity (num parent &optional opened linked)
 157   (list num (or opened wl-thread-insert-opened) nil parent linked))
 158
 159 (defsubst wl-thread-get-entity (num)
 160   (and num
 161        (elmo-get-hash-val (format "#%d" num) wl-thread-entity-hashtb)))
 162
 163 (defsubst wl-thread-entity-set-parent (entity parent)
 164   (setcar (cdddr entity) parent)
 165   entity)
 166
 167 (defsubst wl-thread-entity-set-children (entity children)
 168   (setcar (cddr entity) children))
 169
 170 (defsubst wl-thread-entity-set-linked (entity linked)
 171   (if (cddddr entity)
 172       (setcar (cddddr entity) linked)
 173     (nconc entity (list linked)))
 174   entity)
 175
 176 (defsubst wl-thread-reparent-children (children parent)
 177   (while children
 178     (wl-thread-entity-set-parent
 179      (wl-thread-get-entity (car children)) parent)
 180     (wl-thread-entity-set-linked
 181      (wl-thread-get-entity (car children)) t)
 182     (setq children (cdr children))))
 183
 184 (defsubst wl-thread-entity-insert-as-top (entity)
 185   (when (and entity
 186              (car entity))
 187     (wl-append wl-thread-entity-list (list (car entity)))
 188     (setq wl-thread-entities (cons entity wl-thread-entities))
 189     (setq wl-summary-buffer-number-list
 190           (nconc wl-summary-buffer-number-list (list (car entity))))
 191     (elmo-set-hash-val (format "#%d" (car entity)) entity
 192                        wl-thread-entity-hashtb)))
 193
 194 (defsubst wl-thread-entity-insert-as-children (to entity)
 195   (let ((children (wl-thread-entity-get-children to))
 196         curp curc)
 197     (setq curp to)
 198     (elmo-list-insert wl-summary-buffer-number-list
 199                       (wl-thread-entity-get-number entity)
 200                       (progn
 201                         (while (setq curc
 202                                      (wl-thread-entity-get-children curp))
 203                           (setq curp (wl-thread-get-entity
 204                                       (nth (- (length curc) 1)
 205                                            curc))))
 206                         (wl-thread-entity-get-number curp)))
 207     (setcar (cddr to) (wl-append children
 208                                  (list (car entity))))
 209     (setq wl-thread-entities (cons entity wl-thread-entities))
 210     (elmo-set-hash-val (format "#%d" (car entity)) entity
 211                        wl-thread-entity-hashtb)))
 212
 213 (defsubst wl-thread-entity-set-opened (entity opened)
 214   (setcar (cdr entity) opened))
 215
 216 (defsubst wl-thread-entity-get-children-num (entity)
 217   (let (children
 218         ret-val msgs-stack
 219         (msgs (list (car entity))))
 220    (while msgs
 221      (setq msgs (cdr msgs))
 222      (setq children (wl-thread-entity-get-children entity))
 223      (if (null children)
 224          (while (and (null msgs) msgs-stack)
 225            (setq msgs (wl-pop msgs-stack)))
 226        (setq ret-val (+ (or ret-val 0) (length children)))
 227        (wl-push msgs msgs-stack)
 228        (setq msgs children))
 229      (setq entity (wl-thread-get-entity (car msgs))))
 230    ret-val))
 231
 232 (defsubst wl-thread-entity-get-descendant (entity)
 233   (let (children
 234         ret-val msgs-stack
 235         (msgs (list (car entity))))
 236    (while msgs
 237      (setq msgs (cdr msgs))
 238      (setq children (wl-thread-entity-get-children entity))
 239      (if (null children)
 240          (while (and (null msgs) msgs-stack)
 241            (setq msgs (wl-pop msgs-stack)))
 242        (setq ret-val (append ret-val (copy-sequence children)))
 243        (wl-push msgs msgs-stack)
 244        (setq msgs children))
 245      (setq entity (wl-thread-get-entity (car msgs))))
 246    ret-val))
 247
 248 (defsubst wl-thread-entity-get-parent-entity (entity)
 249   (wl-thread-get-entity (wl-thread-entity-get-parent entity)))
 250
 251 (defun wl-thread-entity-get-top-entity (entity)
 252   (let ((cur-entity entity)
 253         p-num)
 254     (while (setq p-num (wl-thread-entity-get-parent cur-entity))
 255       (setq cur-entity (wl-thread-get-entity p-num)))
 256     cur-entity))
 257
 258 (defun wl-thread-entity-parent-invisible-p (entity)
 259   "If parent of ENTITY is invisible, the top invisible ancestor entity of
 260 ENTITY is returned."
 261   (let ((cur-entity entity)
 262         top)
 263     (catch 'done
 264       (while (setq cur-entity (wl-thread-entity-get-parent-entity
 265                                cur-entity))
 266         (if (null (wl-thread-entity-get-number cur-entity))
 267             (throw 'done nil)
 268           (when (not (wl-thread-entity-get-opened cur-entity))
 269             (setq top cur-entity)))))
 270     top))
 271
 272 (defun wl-thread-entity-get-nearly-older-brother (entity &optional parent)
 273   (let ((brothers (wl-thread-entity-get-older-brothers entity parent)))
 274     (when brothers
 275       (car (last brothers)))))
 276
 277 (defun wl-thread-entity-get-older-brothers (entity &optional parent)
 278   (let* ((parent (or parent
 279                      (wl-thread-entity-get-parent-entity entity)))
 280          (brothers (wl-thread-entity-get-children parent))
 281          ret-val)
 282     (if parent
 283         brothers
 284       (setq brothers wl-thread-entity-list))
 285     (while (and brothers
 286                 (not (eq (wl-thread-entity-get-number entity)
 287                          (car brothers))))
 288       (wl-append ret-val (list (car brothers)))
 289       (setq brothers (cdr brothers)))
 290     ret-val))
 291
 292 (defun wl-thread-entity-get-younger-brothers (entity &optional parent)
 293   (let* ((parent (or parent
 294                      (wl-thread-entity-get-parent-entity entity)))
 295          (brothers (wl-thread-entity-get-children parent)))
 296     (if parent
 297         (cdr (memq (wl-thread-entity-get-number entity)
 298                    brothers))
 299       ;; top!!
 300       (cdr (memq (car entity) wl-thread-entity-list)))))
 301
 302 (defun wl-thread-jump-to-msg (&optional number)
 303   (interactive)
 304   (let ((num (or number
 305                  (string-to-int
 306                   (read-from-minibuffer "Jump to Message(No.): ")))))
 307     (wl-thread-entity-force-open (wl-thread-get-entity num))
 308     (wl-summary-jump-to-msg num)))
 309
 310 (defun wl-thread-close-all ()
 311   "Close all top threads."
 312   (interactive)
 313   (message "Closing all threads...")
 314   (save-excursion
 315     (let ((entities wl-thread-entity-list)
 316           (cur 0)
 317           (len (length wl-thread-entity-list)))
 318       (while entities
 319         (when (and (wl-thread-entity-get-opened (wl-thread-get-entity
 320                                                  (car entities)))
 321                    (wl-thread-entity-get-children (wl-thread-get-entity
 322                                                    (car entities))))
 323           (wl-summary-jump-to-msg (car entities))
 324           (wl-thread-open-close))
 325         (when (> len elmo-display-progress-threshold)
 326           (setq cur (1+ cur))
 327           (if (or (zerop (% cur 5)) (= cur len))
 328               (elmo-display-progress
 329                'wl-thread-close-all "Closing all threads..."
 330                (/ (* cur 100) len))))
 331         (setq entities (cdr entities)))))
 332   (message "Closing all threads...done"))
 333
 334 (defun wl-thread-open-all ()
 335   "Open all threads."
 336   (interactive)
 337   (message "Opening all threads...")
 338   (save-excursion
 339     (goto-char (point-min))
 340     (let ((len (count-lines (point-min) (point-max)))
 341           (cur 0)
 342           entity)
 343       (while (not (eobp))
 344         (if (wl-thread-entity-get-opened
 345              (setq entity (wl-thread-get-entity
 346                            (wl-summary-message-number))))
 347             (forward-line 1)
 348           (wl-thread-force-open)
 349           (wl-thread-goto-bottom-of-sub-thread))
 350         (when (> len elmo-display-progress-threshold)
 351           (setq cur (1+ cur))
 352           (elmo-display-progress
 353            'wl-thread-open-all "Opening all threads..."
 354            (/ (* cur 100) len)))))
 355     ;; Make sure to be 100%.
 356     (elmo-display-progress
 357      'wl-thread-open-all "Opening all threads..."
 358      100))
 359   (message "Opening all threads...done"))
 360
 361 (defun wl-thread-open-all-unread ()
 362   (interactive)
 363   (dolist (number (elmo-folder-list-messages-mark-match
 364                    wl-summary-buffer-elmo-folder
 365                    (wl-regexp-opt (list elmo-msgdb-unread-uncached-mark
 366                                         elmo-msgdb-unread-cached-mark
 367                                         elmo-msgdb-new-mark
 368                                         elmo-msgdb-important-mark))))
 369     (wl-thread-entity-force-open (wl-thread-get-entity number))))
 370
 371 (defsubst wl-thread-maybe-get-children-num (msg)
 372   (let ((entity (wl-thread-get-entity msg)))
 373     (if (not (wl-thread-entity-get-opened entity))
 374         (wl-thread-entity-get-children-num entity))))
 375
 376 (defsubst wl-thread-update-line-on-buffer-sub (entity msg &optional parent-msg)
 377   (let* ((entity (or entity (wl-thread-get-entity msg)))
 378          (parent-msg (or parent-msg (wl-thread-entity-get-parent entity)))
 379          (overview (elmo-msgdb-get-overview (wl-summary-buffer-msgdb)))
 380          (buffer-read-only nil)
 381          (inhibit-read-only t)
 382          overview-entity temp-mark summary-line invisible-top dest-pair)
 383     (if (wl-thread-delete-line-from-buffer msg)
 384         (progn
 385           (cond
 386            ((memq msg wl-summary-buffer-delete-list)
 387             (setq temp-mark "D"))
 388            ((memq msg wl-summary-buffer-target-mark-list)
 389             (setq temp-mark "*"))
 390            ((setq dest-pair (assq msg wl-summary-buffer-refile-list))
 391             (setq temp-mark "o"))
 392            ((setq dest-pair (assq msg wl-summary-buffer-copy-list))
 393             (setq temp-mark "O"))
 394            (t (setq temp-mark (wl-summary-get-score-mark msg))))
 395           (when (setq overview-entity
 396                       (elmo-msgdb-overview-get-entity
 397                        msg (wl-summary-buffer-msgdb)))
 398             (wl-summary-insert-line
 399              (wl-summary-create-line
 400               overview-entity
 401               (elmo-msgdb-overview-get-entity
 402                parent-msg (wl-summary-buffer-msgdb))
 403               temp-mark
 404               (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg)
 405               (if wl-thread-insert-force-opened
 406                   nil
 407                 (wl-thread-maybe-get-children-num msg))
 408               (wl-thread-make-indent-string entity)
 409               (wl-thread-entity-get-linked entity)))
 410             (if dest-pair
 411                 (wl-summary-print-destination (car dest-pair)
 412                                               (cdr dest-pair)))))
 413       ;; insert thread (moving thread)
 414       (if (not (setq invisible-top
 415                      (wl-thread-entity-parent-invisible-p entity)))
 416           (wl-summary-update-thread
 417            (elmo-msgdb-overview-get-entity msg (wl-summary-buffer-msgdb))
 418            entity
 419            (and parent-msg
 420                 (elmo-msgdb-overview-get-entity
 421                  parent-msg (wl-summary-buffer-msgdb))))
 422         ;; currently invisible.. update closed line.
 423         (wl-thread-update-children-number invisible-top)))))
 424
 425 (defun wl-thread-update-line-on-buffer (&optional msg parent-msg updates)
 426   (interactive)
 427   (let ((msgs (list (or msg (wl-summary-message-number))))
 428         entity children msgs-stack)
 429    (while msgs
 430     (setq msg (wl-pop msgs))
 431     (setq updates (and updates (delete msg updates)))
 432     (setq entity (wl-thread-get-entity msg))
 433     (wl-thread-update-line-on-buffer-sub entity msg parent-msg)
 434     ;;
 435     (setq children (wl-thread-entity-get-children entity))
 436     (if children
 437         ;; update children
 438         (when (wl-thread-entity-get-opened entity)
 439           (wl-push msgs msgs-stack)
 440           (setq parent-msg msg
 441                 msgs children))
 442       (unless msgs
 443         (while (and (null msgs) msgs-stack)
 444           (setq msgs (wl-pop msgs-stack)))
 445         (when msgs
 446           (setq parent-msg
 447                 (wl-thread-entity-get-number
 448                  (wl-thread-entity-get-parent-entity
 449                   (wl-thread-get-entity (car msgs)))))))))
 450    updates))
 451
 452 (defun wl-thread-update-line-msgs (msgs &optional no-msg)
 453   (wl-delete-all-overlays)
 454   (let ((i 0)
 455         (updates msgs)
 456         len)
 457 ;;; (while msgs
 458 ;;;   (setq updates
 459 ;;;         (append updates
 460 ;;;                 (wl-thread-get-children-msgs (car msgs))))
 461 ;;;   (setq msgs (cdr msgs)))
 462 ;;; (setq updates (elmo-uniq-list updates))
 463     (setq len (length updates))
 464     (while updates
 465       (wl-thread-update-line-on-buffer-sub nil (car updates))
 466       (setq updates (cdr updates))
 467       (when (and (not no-msg)
 468                  (> len elmo-display-progress-threshold))
 469         (setq i (1+ i))
 470         (if (or (zerop (% i 5)) (= i len))
 471             (elmo-display-progress
 472              'wl-thread-update-line-msgs "Updating deleted thread..."
 473              (/ (* i 100) len)))))))
 474
 475 (defun wl-thread-delete-line-from-buffer (msg)
 476   "Simply delete msg line."
 477   (let (beg)
 478     (if (wl-summary-jump-to-msg msg)
 479         (progn
 480           (setq beg (point))
 481           (forward-line 1)
 482           (delete-region beg (point))
 483           t)
 484       nil)))
 485
 486 (defun wl-thread-cleanup-symbols (msgs)
 487   (let (entity)
 488     (while msgs
 489       (when (setq entity (wl-thread-get-entity (car msgs)))
 490         ;; delete entity.
 491         (setq wl-thread-entities (delq entity wl-thread-entities))
 492         ;; free symbol.
 493         (elmo-clear-hash-val (format "#%d" (car msgs))
 494                              wl-thread-entity-hashtb))
 495       (setq msgs (cdr msgs)))))
 496
 497 (defun wl-thread-get-exist-children (msg &optional include-self)
 498   (let ((msgs (list msg))
 499         msgs-stack children
 500         entity ret-val)
 501     (while msgs
 502       (setq children (wl-thread-entity-get-children
 503                       (setq entity (wl-thread-get-entity (car msgs)))))
 504       (when (elmo-msgdb-overview-get-entity (car msgs)
 505                                             (wl-summary-buffer-msgdb))
 506         (wl-append ret-val (list (car msgs)))
 507         (setq children nil))
 508       (setq msgs (cdr msgs))
 509       (if (null children)
 510           (while (and (null msgs) msgs-stack)
 511             (setq msgs (wl-pop msgs-stack)))
 512         (wl-push msgs msgs-stack)
 513         (setq msgs children)))
 514     (unless include-self (setq ret-val (delq msg ret-val)))
 515     ret-val))
 516
 517 (defun wl-thread-delete-message (msg &optional deep update)
 518   "Delete MSG from entity and buffer."
 519   (save-excursion
 520     (let* ((entity (wl-thread-get-entity msg))
 521            children older-brothers younger-brothers top-child ;;grandchildren
 522            top-entity parent update-msgs beg invisible-top)
 523       (when entity
 524         (setq parent (wl-thread-entity-get-parent-entity entity))
 525         (if parent
 526             (progn
 527 ;;; has parent.
 528 ;;;           (setq brothers (wl-thread-entity-get-children parent))
 529               (setq older-brothers (wl-thread-entity-get-older-brothers
 530                                     entity parent))
 531               (setq younger-brothers (wl-thread-entity-get-younger-brothers
 532                                       entity parent))
 533               ;;
 534               (unless deep
 535                 (setq children (wl-thread-entity-get-children entity))
 536                 (wl-thread-reparent-children
 537                  children (wl-thread-entity-get-number parent))
 538                 (setq update-msgs
 539                       (apply (function nconc)
 540                              update-msgs
 541                              (mapcar
 542                               (function
 543                                (lambda (message)
 544                                  (wl-thread-get-children-msgs message t)))
 545                               children))))
 546               (wl-thread-entity-set-children
 547                parent (append older-brothers children younger-brothers))
 548               ;; If chidren and younger-brothers not exists,
 549               ;; update nearly older brother.
 550               (when (and older-brothers
 551                          (not younger-brothers)
 552                          (not children))
 553                 (wl-append
 554                  update-msgs
 555                  (wl-thread-get-children-msgs (car (last older-brothers))))))
 556
 557           ;; top...oldest child becomes top.
 558           (unless deep
 559             (setq children (wl-thread-entity-get-children entity))
 560             (when children
 561               (setq top-child (car children)
 562                     children (cdr children))
 563               (setq top-entity (wl-thread-get-entity top-child))
 564               (wl-thread-entity-set-parent top-entity nil)
 565               (wl-thread-entity-set-linked top-entity nil)
 566               (wl-append update-msgs
 567                          (wl-thread-get-children-msgs top-child t)))
 568             (when children
 569               (wl-thread-entity-set-children
 570                top-entity
 571                (append
 572                 (wl-thread-entity-get-children top-entity)
 573                 children))
 574               (wl-thread-reparent-children children top-child)
 575               (wl-append update-msgs children)))
 576           ;; delete myself from top list.
 577           (setq wl-summary-buffer-number-list
 578                 (delq msg wl-summary-buffer-number-list))
 579           (setq older-brothers (wl-thread-entity-get-older-brothers
 580                                 entity nil))
 581           (setq younger-brothers (wl-thread-entity-get-younger-brothers
 582                                   entity nil))
 583           (setq wl-thread-entity-list
 584                 (append (append older-brothers
 585                                 (and top-child (list top-child)))
 586                         younger-brothers))))
 587
 588       (if deep
 589           ;; delete thread on buffer
 590           (when (wl-summary-jump-to-msg msg)
 591             (setq beg (point))
 592             (wl-thread-goto-bottom-of-sub-thread)
 593             (delete-region beg (point)))
 594         ;; delete myself from buffer.
 595         (unless (wl-thread-delete-line-from-buffer msg)
 596           ;; jump to suitable point.
 597           ;; just upon the oldest younger-brother of my top.
 598           (setq invisible-top
 599                 (car (wl-thread-entity-parent-invisible-p entity)))
 600           (if invisible-top
 601               (progn
 602                 (wl-append update-msgs (list invisible-top))
 603                 (wl-summary-jump-to-msg invisible-top))
 604             (goto-char (point-max))))
 605
 606         ;; insert children if thread is closed or delete top.
 607         (when (or top-child
 608                   (not (wl-thread-entity-get-opened entity)))
 609           (let* (next-top insert-msgs ent e grandchildren)
 610             (if top-child
 611                 (progn
 612                   (setq insert-msgs (wl-thread-get-exist-children
 613                                      top-child 'include-self))
 614                   (setq next-top (car insert-msgs))
 615                   (setq ent (wl-thread-get-entity next-top))
 616                   (when (and
 617                          (wl-thread-entity-get-opened entity) ;; open
 618                          (not (wl-thread-entity-get-opened ent)) ;; close
 619                          (setq grandchildren
 620                                (wl-thread-entity-get-children ent))
 621                          (wl-summary-jump-to-msg next-top))
 622                     (forward-line 1)
 623                     (setq insert-msgs (append (cdr insert-msgs) grandchildren)))
 624                   (when top-entity (wl-thread-entity-set-opened top-entity t))
 625                   (when ent (wl-thread-entity-set-opened ent t)))
 626               (when (not invisible-top)
 627                 (setq insert-msgs (wl-thread-get-exist-children msg))
 628                 ;; First msg always opened, because first msg maybe becomes top.
 629                 (if (setq ent (wl-thread-get-entity (car insert-msgs)))
 630                     (wl-thread-entity-set-opened ent t))))
 631             ;; insert children
 632             (while insert-msgs
 633               ;; if no exists in summary, insert entity.
 634               (when (and (car insert-msgs)
 635                          (not (wl-summary-jump-to-msg (car insert-msgs))))
 636                 (setq ent (wl-thread-get-entity (car insert-msgs)))
 637                 (wl-thread-insert-entity 0 ; no mean now...
 638                                          ent entity nil))
 639               (setq insert-msgs (cdr insert-msgs))))))
 640       (if update
 641           ;; modify buffer.
 642           (while update-msgs
 643             (wl-thread-update-line-on-buffer-sub nil (pop update-msgs)))
 644         ;; don't update buffer
 645         update-msgs)))) ; return value
 646
 647 (defun wl-thread-insert-message (overview-entity
 648                                  msg parent-msg &optional update linked)
 649   "Insert MSG to the entity.
 650 When optional argument UPDATE is non-nil,
 651 Message is inserted to the summary buffer."
 652   (let ((parent (wl-thread-get-entity parent-msg))
 653         child-entity invisible-top)
 654 ;;; Update the thread view...not implemented yet.
 655 ;;;  (when force-insert
 656 ;;;    (if parent
 657 ;;;       (wl-thread-entity-force-open parent))
 658     (if parent
 659         ;; insert as children.
 660         (wl-thread-entity-insert-as-children
 661          parent
 662          (setq child-entity (wl-thread-create-entity
 663                              msg (nth 0 parent) nil linked)))
 664       ;; insert as top message.
 665       (wl-thread-entity-insert-as-top
 666        (wl-thread-create-entity msg nil)))
 667     (if update
 668         (if (not (setq invisible-top
 669                        (wl-thread-entity-parent-invisible-p child-entity)))
 670             ;; visible.
 671             (progn
 672               (wl-summary-update-thread
 673                overview-entity
 674                child-entity
 675                (elmo-msgdb-overview-get-entity
 676                 parent-msg (wl-summary-buffer-msgdb)))
 677               (when parent
 678                 ;; use thread structure.
 679                 ;;(wl-thread-entity-get-nearly-older-brother
 680                 ;; child-entity parent))) ; return value
 681                 (wl-thread-entity-get-number parent))) ; return value
 682 ;;;           (setq beg (point))
 683 ;;;           (wl-thread-goto-bottom-of-sub-thread)
 684 ;;;           (wl-thread-update-indent-string-region beg (point)))
 685           ;; currently invisible.. update closed line.
 686           (wl-thread-update-children-number invisible-top)
 687           nil))))
 688
 689 (defun wl-thread-get-parent-list (msgs)
 690   (let* ((msgs2 msgs)
 691          myself)
 692     (while msgs2
 693       (setq myself (car msgs2)
 694             msgs2 (cdr msgs2))
 695       (while (not (eq myself (car msgs2)))
 696         (if (wl-thread-descendant-p myself (car msgs2))
 697             (setq msgs (delq (car msgs2) msgs)))
 698         (setq msgs2 (or (cdr msgs2) msgs)))
 699       (setq msgs2 (cdr msgs2)))
 700     msgs))
 701
 702 (defun wl-thread-update-indent-string-thread (top-list)
 703   (let ((top-list (wl-thread-get-parent-list top-list))
 704         beg)
 705     (while top-list
 706       (when (car top-list)
 707         (wl-summary-jump-to-msg (car top-list))
 708         (setq beg (point))
 709         (wl-thread-goto-bottom-of-sub-thread)
 710         (wl-thread-update-indent-string-region beg (point)))
 711       (setq top-list (cdr top-list)))))
 712
 713 (defun wl-thread-update-children-number (entity)
 714   "Update the children number."
 715   (wl-thread-update-line-on-buffer (wl-thread-entity-get-number entity)))
 716
 717 ;;
 718 ;; Thread oriented commands.
 719 ;;
 720 (defun wl-thread-call-region-func (func &optional arg)
 721   (save-excursion
 722     (if arg
 723         (wl-summary-goto-top-of-current-thread)
 724       (beginning-of-line))
 725     (let ((beg (point)))
 726       (wl-thread-goto-bottom-of-sub-thread)
 727       (funcall func beg (point)))))
 728
 729 (defun wl-thread-prefetch (&optional arg)
 730   (interactive "P")
 731   (wl-thread-call-region-func 'wl-summary-prefetch-region arg))
 732
 733 (defun wl-thread-msg-mark-as-important (msg)
 734   "Set mark as important for invisible MSG. Modeline is not changed."
 735   (let ((msgdb (wl-summary-buffer-msgdb))
 736         cur-mark)
 737     (setq cur-mark (elmo-msgdb-get-mark msgdb msg))
 738     (elmo-msgdb-set-mark msgdb
 739                          msg
 740                          (if (string= cur-mark elmo-msgdb-important-mark)
 741                              nil
 742                            elmo-msgdb-important-mark))
 743     (wl-summary-set-mark-modified)))
 744
 745 (defun wl-thread-mark-as-read (&optional arg)
 746   (interactive "P")
 747   (wl-thread-call-region-func 'wl-summary-mark-as-read-region arg))
 748
 749 (defun wl-thread-mark-as-unread (&optional arg)
 750   (interactive "P")
 751   (wl-thread-call-region-func 'wl-summary-mark-as-unread-region arg))
 752
 753 (defun wl-thread-mark-as-important (&optional arg)
 754   (interactive "P")
 755   (wl-thread-call-region-func 'wl-summary-mark-as-important-region arg))
 756
 757 (defun wl-thread-copy (&optional arg)
 758   (interactive "P")
 759   (wl-thread-call-region-func 'wl-summary-copy-region arg))
 760
 761 (defun wl-thread-refile (&optional arg)
 762   (interactive "P")
 763   (condition-case err
 764       (progn
 765         (wl-thread-call-region-func 'wl-summary-refile-region arg)
 766         (if arg
 767             (wl-summary-goto-top-of-current-thread))
 768         (wl-thread-goto-bottom-of-sub-thread))
 769     (error
 770      (elmo-display-error err t)
 771      nil)))
 772
 773 (defun wl-thread-delete (&optional arg)
 774   (interactive "P")
 775   (wl-thread-call-region-func 'wl-summary-delete-region arg)
 776   (if arg
 777       (wl-summary-goto-top-of-current-thread))
 778   (if (not wl-summary-move-direction-downward)
 779       (wl-summary-prev)
 780     (wl-thread-goto-bottom-of-sub-thread)
 781     (if wl-summary-buffer-disp-msg
 782         (wl-summary-redisplay))))
 783
 784 (defun wl-thread-target-mark (&optional arg)
 785   (interactive "P")
 786   (wl-thread-call-region-func 'wl-summary-target-mark-region arg))
 787
 788 (defun wl-thread-unmark (&optional arg)
 789   (interactive "P")
 790   (wl-thread-call-region-func 'wl-summary-unmark-region arg))
 791
 792 (defun wl-thread-exec (&optional arg)
 793   (interactive "P")
 794   (wl-thread-call-region-func 'wl-summary-exec-region arg))
 795
 796 (defun wl-thread-save (&optional arg)
 797   (interactive "P")
 798   (wl-thread-call-region-func 'wl-summary-save-region arg))
 799
 800 (defun wl-thread-force-open (&optional msg-num)
 801   "force open current folder"
 802   (if msg-num
 803       (wl-summary-jump-to-msg msg-num))
 804   (let ((wl-thread-insert-force-opened t))
 805     (wl-thread-open-close)))
 806
 807 (defun wl-thread-entity-force-open (entity)
 808   (let ((wl-thread-insert-force-opened t)
 809         notopen)
 810     (if (null (wl-thread-entity-get-parent entity))
 811         ;; top!!
 812         (if (and (not (wl-thread-entity-get-opened entity))
 813                  (wl-thread-entity-get-children entity))
 814             (wl-thread-force-open (wl-thread-entity-get-number entity)))
 815       (if (setq notopen (wl-thread-entity-parent-invisible-p entity))
 816           (wl-thread-force-open (wl-thread-entity-get-number notopen))))))
 817
 818 (defun wl-thread-insert-top ()
 819   (let ((elist wl-thread-entity-list)
 820         (len (length wl-thread-entity-list))
 821         (cur 0))
 822     (wl-delete-all-overlays)
 823     (while elist
 824       (wl-thread-insert-entity
 825        0
 826        (wl-thread-get-entity (car elist))
 827        nil
 828        len)
 829       (setq elist (cdr elist))
 830       (when (> len elmo-display-progress-threshold)
 831         (setq cur (1+ cur))
 832         (if (or (zerop (% cur 2)) (= cur len))
 833             (elmo-display-progress
 834              'wl-thread-insert-top "Inserting message..."
 835              (/ (* cur 100) len)))))))
 836
 837 (defsubst wl-thread-insert-entity-sub (indent entity parent-entity all)
 838   (let (msg-num
 839         overview-entity
 840         temp-mark
 841         summary-line)
 842     (when (setq msg-num (wl-thread-entity-get-number entity))
 843       (unless all ; all...means no temp-mark.
 844         (cond ((memq msg-num wl-summary-buffer-delete-list)
 845                (setq temp-mark "D"))
 846               ((memq msg-num wl-summary-buffer-target-mark-list)
 847                (setq temp-mark "*"))
 848               ((assq msg-num wl-summary-buffer-refile-list)
 849                (setq temp-mark "o"))
 850               ((assq msg-num wl-summary-buffer-copy-list)
 851                (setq temp-mark "O"))))
 852       (unless temp-mark
 853         (setq temp-mark (wl-summary-get-score-mark msg-num)))
 854       (setq overview-entity
 855             (elmo-msgdb-overview-get-entity
 856              (nth 0 entity) (wl-summary-buffer-msgdb)))
 857 ;;;   (wl-delete-all-overlays)
 858       (when overview-entity
 859         (wl-summary-insert-line
 860          (wl-summary-create-line
 861           overview-entity
 862           (elmo-msgdb-overview-get-entity
 863            (nth 0 parent-entity) (wl-summary-buffer-msgdb))
 864           temp-mark
 865           (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg-num)
 866           (if wl-thread-insert-force-opened
 867               nil
 868             (wl-thread-maybe-get-children-num msg-num))
 869           (wl-thread-make-indent-string entity)
 870           (wl-thread-entity-get-linked entity)))))))
 871
 872 (defun wl-thread-insert-entity (indent entity parent-entity all)
 873   "Insert thread entity in current buffer."
 874   (let ((msgs (list (car entity)))
 875         children msgs-stack)
 876     (while msgs
 877       (wl-thread-insert-entity-sub indent entity parent-entity all)
 878       (setq msgs (cdr msgs))
 879       (setq children (nth 2 entity))
 880       (if children
 881           ;; insert children
 882           (when (or wl-thread-insert-force-opened
 883                     (wl-thread-entity-get-opened entity))
 884             (wl-thread-entity-set-opened entity t)
 885             (wl-push msgs msgs-stack)
 886             (setq msgs children
 887                   indent (1+ indent)
 888                   parent-entity entity)))
 889       (unless msgs
 890         (while (and (null msgs) msgs-stack)
 891           (setq msgs (wl-pop msgs-stack))
 892           (setq indent (1- indent)))
 893         (when msgs
 894           (setq entity (wl-thread-get-entity (car msgs)))
 895           (setq parent-entity (wl-thread-entity-get-parent-entity entity))))
 896       (setq entity (wl-thread-get-entity (car msgs))))))
 897
 898 (defun wl-thread-descendant-p (mynumber number)
 899   (let ((cur (wl-thread-get-entity number))
 900         num)
 901     (catch 'done
 902       (while cur
 903         (setq cur (wl-thread-entity-get-parent-entity cur))
 904         (if (null (setq num (wl-thread-entity-get-number cur))) ; top!
 905             (throw 'done nil))
 906         (if (and num
 907                  (eq mynumber (wl-thread-entity-get-number cur)))
 908             (throw 'done t)))
 909       nil)))
 910
 911 ;; (defun wl-thread-goto-bottom-of-sub-thread ()
 912 ;;   (interactive)
 913 ;;   (let ((depth (wl-thread-get-depth-of-current-line)))
 914 ;;     (forward-line 1)
 915 ;;     (while (and (not (eobp))
 916 ;;              (> (wl-thread-get-depth-of-current-line)
 917 ;;                 depth))
 918 ;;       (forward-line 1))
 919 ;;     (beginning-of-line)))
 920
 921 (defun wl-thread-goto-bottom-of-sub-thread (&optional msg)
 922   (interactive)
 923   (let ((mynumber (or msg (wl-summary-message-number))))
 924     (forward-line 1)
 925     (while (wl-thread-descendant-p mynumber (wl-summary-message-number))
 926       (forward-line 1))
 927     (beginning-of-line)))
 928
 929 (defun wl-thread-remove-destination-region (beg end)
 930   (save-excursion
 931     (save-restriction
 932       (narrow-to-region beg end)
 933       (goto-char (point-min))
 934       (while (not (eobp))
 935         (let ((num (wl-summary-message-number)))
 936           (if (assq num wl-summary-buffer-refile-list)
 937               (wl-summary-remove-destination)))
 938         (forward-line 1)))))
 939
 940 (defun wl-thread-print-destination-region (beg end)
 941   (if (or wl-summary-buffer-refile-list
 942           wl-summary-buffer-copy-list)
 943       (save-excursion
 944         (save-restriction
 945           (narrow-to-region beg end)
 946           (goto-char (point-min))
 947           (while (not (eobp))
 948             (let ((num (wl-summary-message-number))
 949                   pair)
 950               (if (or (setq pair (assq num wl-summary-buffer-refile-list))
 951                       (setq pair (assq num wl-summary-buffer-copy-list)))
 952                   (wl-summary-print-destination (car pair) (cdr pair))))
 953             (forward-line 1))))))
 954
 955 (defsubst wl-thread-get-children-msgs (msg &optional visible-only)
 956   (let ((msgs (list msg))
 957         msgs-stack children
 958         entity ret-val)
 959     (while msgs
 960       (wl-append ret-val (list (car msgs)))
 961       (setq children (wl-thread-entity-get-children
 962                       (setq entity (wl-thread-get-entity (car msgs)))))
 963       (if (and visible-only
 964                (not (wl-thread-entity-get-opened entity)))
 965           (setq children nil))
 966       (setq msgs (cdr msgs))
 967       (if (null children)
 968           (while (and (null msgs) msgs-stack)
 969             (setq msgs (wl-pop msgs-stack)))
 970         (wl-push msgs msgs-stack)
 971         (setq msgs children)))
 972     ret-val))
 973
 974 (defun wl-thread-get-children-msgs-uncached (msg &optional uncached-marks)
 975   (let ((children-msgs (wl-thread-get-children-msgs msg))
 976         (number-alist (elmo-msgdb-get-number-alist (wl-summary-buffer-msgdb)))
 977         mark
 978         uncached-list)
 979     (while children-msgs
 980       (if (and (not (eq msg (car children-msgs))) ; except itself
 981                (or (and uncached-marks
 982                         (setq mark (elmo-msgdb-get-mark
 983                                     (wl-summary-buffer-msgdb)
 984                                     (car children-msgs)))
 985                         (member mark uncached-marks))
 986                    (and (not uncached-marks)
 987                         (null (elmo-file-cache-exists-p
 988                                (elmo-message-field
 989                                 wl-summary-buffer-elmo-folder
 990                                 (car children-msgs)
 991                                 'message-id))))))
 992           (wl-append uncached-list (list (car children-msgs))))
 993       (setq children-msgs (cdr children-msgs)))
 994     uncached-list))
 995
 996 (defun wl-thread-get-children-msgs-with-mark (msg mark)
 997   (let ((children-msgs (wl-thread-get-children-msgs msg))
 998         (check-func (cond ((string= mark "o")
 999                            'wl-summary-msg-marked-as-refiled)
1000                           ((string= mark "O")
1001                            'wl-summary-msg-marked-as-copied)
1002                           ((string= mark "D")
1003                            'wl-summary-msg-marked-as-deleted)
1004                           ((string= mark "*")
1005                            'wl-summary-msg-marked-as-target)))
1006         ret-val)
1007     (while children-msgs
1008       (if (funcall check-func (car children-msgs))
1009           (wl-append ret-val (list (car children-msgs))))
1010       (setq children-msgs (cdr children-msgs)))
1011     ret-val))
1012
1013 (defun wl-thread-close (entity)
1014   (let (depth beg)
1015     (wl-thread-entity-set-opened entity nil)
1016     (setq depth (wl-thread-get-depth-of-current-line))
1017     (beginning-of-line)
1018     (setq beg (point))
1019     (wl-thread-goto-bottom-of-sub-thread)
1020     (wl-thread-remove-destination-region beg
1021                                          (point))
1022     (forward-char -1)   ;; needed for mouse-face.
1023     (delete-region beg (point))
1024     (wl-thread-insert-entity (- depth 1)
1025                              entity
1026                              (wl-thread-get-entity
1027                               (nth 3 entity))
1028                              nil)
1029     (delete-char 1) ; delete '\n'
1030     (wl-thread-print-destination-region beg (point))))
1031
1032 (defun wl-thread-open (entity)
1033   (let (depth beg)
1034     (beginning-of-line)
1035     (setq beg (point))
1036     (setq depth (wl-thread-get-depth-of-current-line))
1037     (end-of-line)
1038     (delete-region beg (point))
1039     (wl-thread-entity-set-opened entity t)
1040     (wl-thread-insert-entity depth ;(- depth 1)
1041                              entity
1042                              (wl-thread-get-entity
1043                               (nth 3 entity)) nil)
1044     (delete-char 1) ; delete '\n'
1045     (wl-thread-print-destination-region beg (point))))
1046
1047 (defun wl-thread-open-close (&optional force-open)
1048   (interactive "P")
1049   (when (eq wl-summary-buffer-view 'thread)
1050 ;;; (if (equal wl-thread-top-entity '(nil t nil nil))
1051 ;;;     (error "There's no thread structure"))
1052     (save-excursion
1053       (let ((inhibit-read-only t)
1054             (buffer-read-only nil)
1055             (wl-thread-insert-force-opened
1056              (or wl-thread-insert-force-opened
1057                  force-open))
1058             msg entity parent)
1059         (setq msg (wl-summary-message-number))
1060         (setq entity (wl-thread-get-entity msg))
1061         (if (wl-thread-entity-get-opened entity)
1062             ;; if already opened, close its child!
1063           (if (wl-thread-entity-get-children entity)
1064               (wl-thread-close entity)
1065             ;; opened, but has no children, close its parent!
1066             (when (setq parent (wl-thread-entity-get-parent entity))
1067               (wl-summary-jump-to-msg parent)
1068               (wl-thread-close
1069                (wl-thread-get-entity (wl-summary-message-number)))))
1070           ;; if closed (or it is just a thread bottom message)
1071           ;; has children, open it!
1072           (if (wl-thread-entity-get-children entity)
1073               (wl-thread-open entity)
1074             ;; closed, and has no children, close its parent!
1075             (setq msg (or (wl-thread-entity-get-parent entity)
1076                           (wl-thread-entity-get-number entity)))
1077             (when msg
1078               (wl-summary-jump-to-msg msg)
1079               (wl-thread-close
1080                (wl-thread-get-entity (wl-summary-message-number)))))))
1081       (when wl-summary-lazy-highlight
1082         (wl-highlight-summary-window))
1083       (wl-summary-set-message-modified)
1084       (set-buffer-modified-p nil))))
1085
1086 (defun wl-thread-get-depth-of-current-line ()
1087   (let ((entity (wl-thread-get-entity (wl-summary-message-number)))
1088         (depth 0)
1089         number)
1090     (while (setq number (wl-thread-entity-get-parent entity))
1091       (incf depth)
1092       (setq entity (wl-thread-get-entity number)))
1093     depth))
1094
1095 (defun wl-thread-update-indent-string-region (beg end)
1096   (interactive "r")
1097   (save-excursion
1098     (goto-char beg)
1099     (while (< (point) end)
1100       (save-excursion
1101         (wl-thread-update-line-on-buffer-sub nil (wl-summary-message-number)))
1102       (forward-line 1))))
1103
1104 (defsubst wl-thread-make-indent-string (entity)
1105   (let ((cur entity)
1106         (ret-val "")
1107         (space-str (wl-repeat-string wl-thread-space-str-internal
1108                                      (- wl-thread-indent-level-internal 1)))
1109         parent)
1110     (when (wl-thread-entity-get-number
1111            (setq parent (wl-thread-entity-get-parent-entity cur)))
1112       (if (wl-thread-entity-get-younger-brothers cur)
1113           (setq ret-val wl-thread-have-younger-brother-str-internal)
1114         (setq ret-val wl-thread-youngest-child-str-internal))
1115       (setq ret-val (concat ret-val
1116                             (wl-repeat-string
1117                              wl-thread-horizontal-str-internal
1118                              (- wl-thread-indent-level-internal 1))))
1119       (setq cur parent)
1120       (while (wl-thread-entity-get-number
1121               (wl-thread-entity-get-parent-entity cur))
1122         (if (wl-thread-entity-get-younger-brothers cur)
1123             (setq ret-val (concat wl-thread-vertical-str-internal
1124                                   space-str
1125                                   ret-val))
1126           (setq ret-val (concat wl-thread-space-str-internal
1127                                 space-str
1128                                 ret-val)))
1129         (setq cur (wl-thread-entity-get-parent-entity cur))))
1130     ret-val))
1131
1132 (defun wl-thread-set-parent (&optional parent-number)
1133   "Set current message's parent interactively."
1134   (interactive)
1135   (let ((number (wl-summary-message-number))
1136         (dst-parent (if (interactive-p)
1137                         (read-from-minibuffer "Parent Message (No.): ")))
1138         entity dst-parent-entity src-parent children
1139         update-msgs
1140         buffer-read-only)
1141     (if (string= dst-parent "")
1142         (setq dst-parent nil)
1143       (if (interactive-p)
1144           (setq dst-parent (string-to-int dst-parent))
1145         (setq dst-parent parent-number)))
1146     (if (and dst-parent
1147              (memq dst-parent (wl-thread-get-children-msgs number)))
1148         (error "Parent is children or myself"))
1149     (setq entity (wl-thread-get-entity number))
1150     (when (and number entity)
1151       ;; delete thread
1152       (setq update-msgs (wl-thread-delete-message number 'deep))
1153       ;; insert as child at new parent
1154       (setq dst-parent-entity (wl-thread-get-entity dst-parent))
1155       (if dst-parent-entity
1156           (progn
1157             (if (setq children
1158                       (wl-thread-entity-get-children dst-parent-entity))
1159                 (wl-append update-msgs
1160                            (wl-thread-get-children-msgs
1161                             (car (last children)) t)))
1162             (wl-thread-entity-set-children
1163              dst-parent-entity
1164              (append children (list number)))
1165             (wl-thread-entity-set-linked entity t))
1166         ;; insert as top
1167         (wl-append wl-thread-entity-list (list number))
1168         (wl-thread-entity-set-linked entity nil))
1169
1170       ;; update my thread
1171       (wl-append update-msgs (wl-thread-get-children-msgs number t))
1172       (setq update-msgs (elmo-uniq-list update-msgs))
1173       (wl-thread-entity-set-parent entity dst-parent)
1174       ;; update thread on buffer
1175       (wl-thread-update-line-msgs update-msgs t))))
1176
1177 (require 'product)
1178 (product-provide (provide 'wl-thread) (require 'wl-version))
1179
1180 ;;; wl-thread.el ends here