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         ret-val)
 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             ;; top!!
 268             (progn
 269               ;;(setq ret-val nil)
 270               (throw 'done nil))
 271           (when (not (wl-thread-entity-get-opened cur-entity))
 272             ;; not opened!!
 273             (setq ret-val cur-entity)))))
 274     ;; top of closed entity in the path.
 275     ret-val))
 276
 277 (defun wl-thread-entity-get-nearly-older-brother (entity &optional parent)
 278   (let ((brothers (wl-thread-entity-get-older-brothers entity parent)))
 279     (when brothers
 280       (car (last brothers)))))
 281
 282 (defun wl-thread-entity-get-older-brothers (entity &optional parent)
 283   (let* ((parent (or parent
 284                      (wl-thread-entity-get-parent-entity entity)))
 285          (brothers (wl-thread-entity-get-children parent))
 286          ret-val)
 287     (if parent
 288         brothers
 289       (setq brothers wl-thread-entity-list))
 290     (while (and brothers
 291                 (not (eq (wl-thread-entity-get-number entity)
 292                          (car brothers))))
 293       (wl-append ret-val (list (car brothers)))
 294       (setq brothers (cdr brothers)))
 295     ret-val))
 296
 297 (defun wl-thread-entity-get-younger-brothers (entity &optional parent)
 298   (let* ((parent (or parent
 299                      (wl-thread-entity-get-parent-entity entity)))
 300          (brothers (wl-thread-entity-get-children parent)))
 301     (if parent
 302         (cdr (memq (wl-thread-entity-get-number entity)
 303                    brothers))
 304       ;; top!!
 305       (cdr (memq (car entity) wl-thread-entity-list)))))
 306
 307 (defun wl-thread-jump-to-msg (&optional number)
 308   (interactive)
 309   (let ((num (or number
 310                  (string-to-int
 311                   (read-from-minibuffer "Jump to Message(No.): ")))))
 312     (wl-thread-entity-force-open (wl-thread-get-entity num))
 313     (wl-summary-jump-to-msg num)))
 314
 315 (defun wl-thread-close-all ()
 316   "Close all top threads."
 317   (interactive)
 318   (message "Closing all threads...")
 319   (save-excursion
 320     (let ((entities wl-thread-entity-list)
 321           (cur 0)
 322           (len (length wl-thread-entity-list)))
 323       (while entities
 324         (when (and (wl-thread-entity-get-opened (wl-thread-get-entity
 325                                                  (car entities)))
 326                    (wl-thread-entity-get-children (wl-thread-get-entity
 327                                                    (car entities))))
 328           (wl-summary-jump-to-msg (car entities))
 329           (wl-thread-open-close))
 330         (when (> len elmo-display-progress-threshold)
 331           (setq cur (1+ cur))
 332           (if (or (zerop (% cur 5)) (= cur len))
 333               (elmo-display-progress
 334                'wl-thread-close-all "Closing all threads..."
 335                (/ (* cur 100) len))))
 336         (setq entities (cdr entities)))))
 337   (message "Closing all threads...done"))
 338
 339 (defun wl-thread-open-all ()
 340   "Open all threads."
 341   (interactive)
 342   (message "Opening all threads...")
 343   (save-excursion
 344     (goto-char (point-min))
 345     (let ((len (count-lines (point-min) (point-max)))
 346           (cur 0)
 347           entity)
 348       (while (not (eobp))
 349         (if (wl-thread-entity-get-opened
 350              (setq entity (wl-thread-get-entity
 351                            (wl-summary-message-number))))
 352             (forward-line 1)
 353           (wl-thread-force-open)
 354           (wl-thread-goto-bottom-of-sub-thread))
 355         (when (> len elmo-display-progress-threshold)
 356           (setq cur (1+ cur))
 357           (elmo-display-progress
 358            'wl-thread-open-all "Opening all threads..."
 359            (/ (* cur 100) len)))))
 360     ;; Make sure to be 100%.
 361     (elmo-display-progress
 362      'wl-thread-open-all "Opening all threads..."
 363      100))
 364   (message "Opening all threads...done"))
 365
 366 (defun wl-thread-open-all-unread ()
 367   (interactive)
 368   (dolist (number (elmo-folder-list-messages-mark-match
 369                    wl-summary-buffer-elmo-folder
 370                    (wl-regexp-opt (list wl-summary-unread-uncached-mark
 371                                         wl-summary-unread-cached-mark
 372                                         wl-summary-new-mark
 373                                         wl-summary-important-mark))))
 374     (wl-thread-entity-force-open (wl-thread-get-entity number))))
 375
 376 (defsubst wl-thread-maybe-get-children-num (msg)
 377   (let ((entity (wl-thread-get-entity msg)))
 378     (if (not (wl-thread-entity-get-opened entity))
 379         (wl-thread-entity-get-children-num entity))))
 380
 381 (defsubst wl-thread-update-line-on-buffer-sub (entity msg &optional parent-msg)
 382   (let* ((entity (or entity (wl-thread-get-entity msg)))
 383          (parent-msg (or parent-msg (wl-thread-entity-get-parent entity)))
 384          (overview (elmo-msgdb-get-overview (wl-summary-buffer-msgdb)))
 385          (buffer-read-only nil)
 386          (inhibit-read-only t)
 387          overview-entity temp-mark summary-line invisible-top dest-pair)
 388     (if (wl-thread-delete-line-from-buffer msg)
 389         (progn
 390           (cond
 391            ((memq msg wl-summary-buffer-delete-list)
 392             (setq temp-mark "D"))
 393            ((memq msg wl-summary-buffer-target-mark-list)
 394             (setq temp-mark "*"))
 395            ((setq dest-pair (assq msg wl-summary-buffer-refile-list))
 396             (setq temp-mark "o"))
 397            ((setq dest-pair (assq msg wl-summary-buffer-copy-list))
 398             (setq temp-mark "O"))
 399            (t (setq temp-mark (wl-summary-get-score-mark msg))))
 400           (when (setq overview-entity
 401                       (elmo-msgdb-overview-get-entity
 402                        msg (wl-summary-buffer-msgdb)))
 403             (wl-summary-insert-line
 404              (wl-summary-create-line
 405               overview-entity
 406               (elmo-msgdb-overview-get-entity
 407                parent-msg (wl-summary-buffer-msgdb))
 408               temp-mark
 409               (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg)
 410               (if wl-thread-insert-force-opened
 411                   nil
 412                 (wl-thread-maybe-get-children-num msg))
 413               (wl-thread-make-indent-string entity)
 414               (wl-thread-entity-get-linked entity)))
 415             (if dest-pair
 416                 (wl-summary-print-destination (car dest-pair)
 417                                               (cdr dest-pair)))))
 418       ;; insert thread (moving thread)
 419       (if (not (setq invisible-top
 420                      (wl-thread-entity-parent-invisible-p entity)))
 421           (wl-summary-update-thread
 422            (elmo-msgdb-overview-get-entity msg (wl-summary-buffer-msgdb))
 423            entity
 424            (and parent-msg
 425                 (elmo-msgdb-overview-get-entity
 426                  parent-msg (wl-summary-buffer-msgdb))))
 427         ;; currently invisible.. update closed line.
 428         (wl-thread-update-children-number invisible-top)))))
 429
 430 (defun wl-thread-update-line-on-buffer (&optional msg parent-msg updates)
 431   (interactive)
 432   (let ((msgs (list (or msg (wl-summary-message-number))))
 433         entity children msgs-stack)
 434    (while msgs
 435     (setq msg (wl-pop msgs))
 436     (setq updates (and updates (delete msg updates)))
 437     (setq entity (wl-thread-get-entity msg))
 438     (wl-thread-update-line-on-buffer-sub entity msg parent-msg)
 439     ;;
 440     (setq children (wl-thread-entity-get-children entity))
 441     (if children
 442         ;; update children
 443         (when (wl-thread-entity-get-opened entity)
 444           (wl-push msgs msgs-stack)
 445           (setq parent-msg msg
 446                 msgs children))
 447       (unless msgs
 448         (while (and (null msgs) msgs-stack)
 449           (setq msgs (wl-pop msgs-stack)))
 450         (when msgs
 451           (setq parent-msg
 452                 (wl-thread-entity-get-number
 453                  (wl-thread-entity-get-parent-entity
 454                   (wl-thread-get-entity (car msgs)))))))))
 455    updates))
 456
 457 (defun wl-thread-update-line-msgs (msgs &optional no-msg)
 458   (wl-delete-all-overlays)
 459   (let ((i 0)
 460         (updates msgs)
 461         len)
 462 ;;; (while msgs
 463 ;;;   (setq updates
 464 ;;;         (append updates
 465 ;;;                 (wl-thread-get-children-msgs (car msgs))))
 466 ;;;   (setq msgs (cdr msgs)))
 467 ;;; (setq updates (elmo-uniq-list updates))
 468     (setq len (length updates))
 469     (while updates
 470       (wl-thread-update-line-on-buffer-sub nil (car updates))
 471       (setq updates (cdr updates))
 472       (when (and (not no-msg)
 473                  (> len elmo-display-progress-threshold))
 474         (setq i (1+ i))
 475         (if (or (zerop (% i 5)) (= i len))
 476             (elmo-display-progress
 477              'wl-thread-update-line-msgs "Updating deleted thread..."
 478              (/ (* i 100) len)))))))
 479
 480 (defun wl-thread-delete-line-from-buffer (msg)
 481   "Simply delete msg line."
 482   (let (beg)
 483     (if (wl-summary-jump-to-msg msg)
 484         (progn
 485           (setq beg (point))
 486           (forward-line 1)
 487           (delete-region beg (point))
 488           t)
 489       nil)))
 490
 491 (defun wl-thread-cleanup-symbols (msgs)
 492   (let (entity)
 493     (while msgs
 494       (when (setq entity (wl-thread-get-entity (car msgs)))
 495         ;; delete entity.
 496         (setq wl-thread-entities (delq entity wl-thread-entities))
 497         ;; free symbol.
 498         (elmo-clear-hash-val (format "#%d" (car msgs))
 499                              wl-thread-entity-hashtb))
 500       (setq msgs (cdr msgs)))))
 501
 502 (defun wl-thread-get-exist-children (msg &optional include-self)
 503   (let ((msgs (list msg))
 504         msgs-stack children
 505         entity ret-val)
 506     (while msgs
 507       (setq children (wl-thread-entity-get-children
 508                       (setq entity (wl-thread-get-entity (car msgs)))))
 509       (when (elmo-msgdb-overview-get-entity (car msgs)
 510                                             (wl-summary-buffer-msgdb))
 511         (wl-append ret-val (list (car msgs)))
 512         (setq children nil))
 513       (setq msgs (cdr msgs))
 514       (if (null children)
 515           (while (and (null msgs) msgs-stack)
 516             (setq msgs (wl-pop msgs-stack)))
 517         (wl-push msgs msgs-stack)
 518         (setq msgs children)))
 519     (unless include-self (setq ret-val (delq msg ret-val)))
 520     ret-val))
 521
 522 (defun wl-thread-delete-message (msg &optional deep update)
 523   "Delete MSG from entity and buffer."
 524   (save-excursion
 525     (let* ((entity (wl-thread-get-entity msg))
 526            children older-brothers younger-brothers top-child ;;grandchildren
 527            top-entity parent update-msgs beg invisible-top)
 528       (when entity
 529         (setq parent (wl-thread-entity-get-parent-entity entity))
 530         (if parent
 531             (progn
 532 ;;; has parent.
 533 ;;;           (setq brothers (wl-thread-entity-get-children parent))
 534               (setq older-brothers (wl-thread-entity-get-older-brothers
 535                                     entity parent))
 536               (setq younger-brothers (wl-thread-entity-get-younger-brothers
 537                                       entity parent))
 538               ;;
 539               (unless deep
 540                 (setq children (wl-thread-entity-get-children entity))
 541                 (wl-thread-reparent-children
 542                  children (wl-thread-entity-get-number parent))
 543                 (setq update-msgs
 544                       (apply (function nconc)
 545                              update-msgs
 546                              (mapcar
 547                               (function
 548                                (lambda (message)
 549                                  (wl-thread-get-children-msgs message t)))
 550                               children))))
 551               (wl-thread-entity-set-children
 552                parent (append older-brothers children younger-brothers))
 553               ;; If chidren and younger-brothers not exists,
 554               ;; update nearly older brother.
 555               (when (and older-brothers
 556                          (not younger-brothers)
 557                          (not children))
 558                 (wl-append
 559                  update-msgs
 560                  (wl-thread-get-children-msgs (car (last older-brothers))))))
 561
 562           ;; top...oldest child becomes top.
 563           (unless deep
 564             (setq children (wl-thread-entity-get-children entity))
 565             (when children
 566               (setq top-child (car children)
 567                     children (cdr children))
 568               (setq top-entity (wl-thread-get-entity top-child))
 569               (wl-thread-entity-set-parent top-entity nil)
 570               (wl-thread-entity-set-linked top-entity nil)
 571               (wl-append update-msgs
 572                          (wl-thread-get-children-msgs top-child t)))
 573             (when children
 574               (wl-thread-entity-set-children
 575                top-entity
 576                (append
 577                 (wl-thread-entity-get-children top-entity)
 578                 children))
 579               (wl-thread-reparent-children children top-child)
 580               (wl-append update-msgs children)))
 581           ;; delete myself from top list.
 582           (setq wl-summary-buffer-number-list
 583                 (delq msg wl-summary-buffer-number-list))
 584           (setq older-brothers (wl-thread-entity-get-older-brothers
 585                                 entity nil))
 586           (setq younger-brothers (wl-thread-entity-get-younger-brothers
 587                                   entity nil))
 588           (setq wl-thread-entity-list
 589                 (append (append older-brothers
 590                                 (and top-child (list top-child)))
 591                         younger-brothers))))
 592
 593       (if deep
 594           ;; delete thread on buffer
 595           (when (wl-summary-jump-to-msg msg)
 596             (setq beg (point))
 597             (wl-thread-goto-bottom-of-sub-thread)
 598             (delete-region beg (point)))
 599         ;; delete myself from buffer.
 600         (unless (wl-thread-delete-line-from-buffer msg)
 601           ;; jump to suitable point.
 602           ;; just upon the oldest younger-brother of my top.
 603           (setq invisible-top
 604                 (car (wl-thread-entity-parent-invisible-p entity)))
 605           (if invisible-top
 606               (progn
 607                 (wl-append update-msgs (list invisible-top))
 608                 (wl-summary-jump-to-msg invisible-top))
 609             (goto-char (point-max))))
 610
 611         ;; insert children if thread is closed or delete top.
 612         (when (or top-child
 613                   (not (wl-thread-entity-get-opened entity)))
 614           (let* (next-top insert-msgs ent e grandchildren)
 615             (if top-child
 616                 (progn
 617                   (setq insert-msgs (wl-thread-get-exist-children
 618                                      top-child 'include-self))
 619                   (setq next-top (car insert-msgs))
 620                   (setq ent (wl-thread-get-entity next-top))
 621                   (when (and
 622                          (wl-thread-entity-get-opened entity) ;; open
 623                          (not (wl-thread-entity-get-opened ent)) ;; close
 624                          (setq grandchildren
 625                                (wl-thread-entity-get-children ent))
 626                          (wl-summary-jump-to-msg next-top))
 627                     (forward-line 1)
 628                     (setq insert-msgs (append (cdr insert-msgs) grandchildren)))
 629                   (when top-entity (wl-thread-entity-set-opened top-entity t))
 630                   (when ent (wl-thread-entity-set-opened ent t)))
 631               (when (not invisible-top)
 632                 (setq insert-msgs (wl-thread-get-exist-children msg))
 633                 ;; First msg always opened, because first msg maybe becomes top.
 634                 (if (setq ent (wl-thread-get-entity (car insert-msgs)))
 635                     (wl-thread-entity-set-opened ent t))))
 636             ;; insert children
 637             (while insert-msgs
 638               ;; if no exists in summary, insert entity.
 639               (when (and (car insert-msgs)
 640                          (not (wl-summary-jump-to-msg (car insert-msgs))))
 641                 (setq ent (wl-thread-get-entity (car insert-msgs)))
 642                 (wl-thread-insert-entity 0 ; no mean now...
 643                                          ent entity nil))
 644               (setq insert-msgs (cdr insert-msgs))))))
 645       (if update
 646           ;; modify buffer.
 647           (while update-msgs
 648             (wl-thread-update-line-on-buffer-sub nil (pop update-msgs)))
 649         ;; don't update buffer
 650         update-msgs)))) ; return value
 651
 652 (defun wl-thread-insert-message (overview-entity
 653                                  msg parent-msg &optional update linked)
 654   "Insert MSG to the entity.
 655 When optional argument UPDATE is non-nil,
 656 Message is inserted to the summary buffer."
 657   (let ((parent (wl-thread-get-entity parent-msg))
 658         child-entity invisible-top)
 659 ;;; Update the thread view...not implemented yet.
 660 ;;;  (when force-insert
 661 ;;;    (if parent
 662 ;;;       (wl-thread-entity-force-open parent))
 663     (if parent
 664         ;; insert as children.
 665         (wl-thread-entity-insert-as-children
 666          parent
 667          (setq child-entity (wl-thread-create-entity
 668                              msg (nth 0 parent) nil linked)))
 669       ;; insert as top message.
 670       (wl-thread-entity-insert-as-top
 671        (wl-thread-create-entity msg nil)))
 672     (if update
 673         (if (not (setq invisible-top
 674                        (wl-thread-entity-parent-invisible-p child-entity)))
 675             ;; visible.
 676             (progn
 677               (wl-summary-update-thread
 678                overview-entity
 679                child-entity
 680                (elmo-msgdb-overview-get-entity
 681                 parent-msg (wl-summary-buffer-msgdb)))
 682               (when parent
 683                 ;; use thread structure.
 684                 ;;(wl-thread-entity-get-nearly-older-brother
 685                 ;; child-entity parent))) ; return value
 686                 (wl-thread-entity-get-number parent))) ; return value
 687 ;;;           (setq beg (point))
 688 ;;;           (wl-thread-goto-bottom-of-sub-thread)
 689 ;;;           (wl-thread-update-indent-string-region beg (point)))
 690           ;; currently invisible.. update closed line.
 691           (wl-thread-update-children-number invisible-top)
 692           nil))))
 693
 694 (defun wl-thread-get-parent-list (msgs)
 695   (let* ((msgs2 msgs)
 696          myself)
 697     (while msgs2
 698       (setq myself (car msgs2)
 699             msgs2 (cdr msgs2))
 700       (while (not (eq myself (car msgs2)))
 701         (if (wl-thread-descendant-p myself (car msgs2))
 702             (setq msgs (delq (car msgs2) msgs)))
 703         (setq msgs2 (or (cdr msgs2) msgs)))
 704       (setq msgs2 (cdr msgs2)))
 705     msgs))
 706
 707 (defun wl-thread-update-indent-string-thread (top-list)
 708   (let ((top-list (wl-thread-get-parent-list top-list))
 709         beg)
 710     (while top-list
 711       (when (car top-list)
 712         (wl-summary-jump-to-msg (car top-list))
 713         (setq beg (point))
 714         (wl-thread-goto-bottom-of-sub-thread)
 715         (wl-thread-update-indent-string-region beg (point)))
 716       (setq top-list (cdr top-list)))))
 717
 718 (defun wl-thread-update-children-number (entity)
 719   "Update the children number."
 720   (wl-thread-update-line-on-buffer (wl-thread-entity-get-number entity)))
 721
 722 ;;
 723 ;; Thread oriented commands.
 724 ;;
 725 (defun wl-thread-call-region-func (func &optional arg)
 726   (save-excursion
 727     (if arg
 728         (wl-summary-goto-top-of-current-thread)
 729       (beginning-of-line))
 730     (let ((beg (point)))
 731       (wl-thread-goto-bottom-of-sub-thread)
 732       (funcall func beg (point)))))
 733
 734 (defun wl-thread-prefetch (&optional arg)
 735   (interactive "P")
 736   (wl-thread-call-region-func 'wl-summary-prefetch-region arg))
 737
 738 (defun wl-thread-msg-mark-as-important (msg)
 739   "Set mark as important for invisible MSG. Modeline is not changed."
 740   (let ((msgdb (wl-summary-buffer-msgdb))
 741         cur-mark)
 742     (setq cur-mark (elmo-msgdb-get-mark msgdb msg))
 743     (elmo-msgdb-set-mark msgdb
 744                          msg
 745                          (if (string= cur-mark wl-summary-important-mark)
 746                              nil
 747                            wl-summary-important-mark))
 748     (wl-summary-set-mark-modified)))
 749
 750 (defun wl-thread-mark-as-read (&optional arg)
 751   (interactive "P")
 752   (wl-thread-call-region-func 'wl-summary-mark-as-read-region arg))
 753
 754 (defun wl-thread-mark-as-unread (&optional arg)
 755   (interactive "P")
 756   (wl-thread-call-region-func 'wl-summary-mark-as-unread-region arg))
 757
 758 (defun wl-thread-mark-as-important (&optional arg)
 759   (interactive "P")
 760   (wl-thread-call-region-func 'wl-summary-mark-as-important-region arg))
 761
 762 (defun wl-thread-copy (&optional arg)
 763   (interactive "P")
 764   (wl-thread-call-region-func 'wl-summary-copy-region arg))
 765
 766 (defun wl-thread-refile (&optional arg)
 767   (interactive "P")
 768   (condition-case err
 769       (progn
 770         (wl-thread-call-region-func 'wl-summary-refile-region arg)
 771         (if arg
 772             (wl-summary-goto-top-of-current-thread))
 773         (wl-thread-goto-bottom-of-sub-thread))
 774     (error
 775      (elmo-display-error err t)
 776      nil)))
 777
 778 (defun wl-thread-delete (&optional arg)
 779   (interactive "P")
 780   (wl-thread-call-region-func 'wl-summary-delete-region arg)
 781   (if arg
 782       (wl-summary-goto-top-of-current-thread))
 783   (if (not wl-summary-move-direction-downward)
 784       (wl-summary-prev)
 785     (wl-thread-goto-bottom-of-sub-thread)
 786     (if wl-summary-buffer-disp-msg
 787         (wl-summary-redisplay))))
 788
 789 (defun wl-thread-target-mark (&optional arg)
 790   (interactive "P")
 791   (wl-thread-call-region-func 'wl-summary-target-mark-region arg))
 792
 793 (defun wl-thread-unmark (&optional arg)
 794   (interactive "P")
 795   (wl-thread-call-region-func 'wl-summary-unmark-region arg))
 796
 797 (defun wl-thread-exec (&optional arg)
 798   (interactive "P")
 799   (wl-thread-call-region-func 'wl-summary-exec-region arg))
 800
 801 (defun wl-thread-save (&optional arg)
 802   (interactive "P")
 803   (wl-thread-call-region-func 'wl-summary-save-region arg))
 804
 805 (defun wl-thread-force-open (&optional msg-num)
 806   "force open current folder"
 807   (if msg-num
 808       (wl-summary-jump-to-msg msg-num))
 809   (let ((wl-thread-insert-force-opened t))
 810     (wl-thread-open-close)))
 811
 812 (defun wl-thread-entity-force-open (entity)
 813   (let ((wl-thread-insert-force-opened t)
 814         notopen)
 815     (if (null (wl-thread-entity-get-parent entity))
 816         ;; top!!
 817         (if (and (not (wl-thread-entity-get-opened entity))
 818                  (wl-thread-entity-get-children entity))
 819             (wl-thread-force-open (wl-thread-entity-get-number entity)))
 820       (if (setq notopen (wl-thread-entity-parent-invisible-p entity))
 821           (wl-thread-force-open (wl-thread-entity-get-number notopen))))))
 822
 823 (defun wl-thread-insert-top ()
 824   (let ((elist wl-thread-entity-list)
 825         (len (length wl-thread-entity-list))
 826         (cur 0))
 827     (wl-delete-all-overlays)
 828     (while elist
 829       (wl-thread-insert-entity
 830        0
 831        (wl-thread-get-entity (car elist))
 832        nil
 833        len)
 834       (setq elist (cdr elist))
 835       (when (> len elmo-display-progress-threshold)
 836         (setq cur (1+ cur))
 837         (if (or (zerop (% cur 2)) (= cur len))
 838             (elmo-display-progress
 839              'wl-thread-insert-top "Inserting thread..."
 840              (/ (* cur 100) len)))))))
 841
 842 (defsubst wl-thread-insert-entity-sub (indent entity parent-entity all)
 843   (let (msg-num
 844         overview-entity
 845         temp-mark
 846         summary-line)
 847     (when (setq msg-num (wl-thread-entity-get-number entity))
 848       (unless all ; all...means no temp-mark.
 849         (cond ((memq msg-num wl-summary-buffer-delete-list)
 850                (setq temp-mark "D"))
 851               ((memq msg-num wl-summary-buffer-target-mark-list)
 852                (setq temp-mark "*"))
 853               ((assq msg-num wl-summary-buffer-refile-list)
 854                (setq temp-mark "o"))
 855               ((assq msg-num wl-summary-buffer-copy-list)
 856                (setq temp-mark "O"))))
 857       (unless temp-mark
 858         (setq temp-mark (wl-summary-get-score-mark msg-num)))
 859       (setq overview-entity
 860             (elmo-msgdb-overview-get-entity
 861              (nth 0 entity) (wl-summary-buffer-msgdb)))
 862 ;;;   (wl-delete-all-overlays)
 863       (when overview-entity
 864         (wl-summary-insert-line
 865          (wl-summary-create-line
 866           overview-entity
 867           (elmo-msgdb-overview-get-entity
 868            (nth 0 parent-entity) (wl-summary-buffer-msgdb))
 869           temp-mark
 870           (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg-num)
 871           (if wl-thread-insert-force-opened
 872               nil
 873             (wl-thread-maybe-get-children-num msg-num))
 874           (wl-thread-make-indent-string entity)
 875           (wl-thread-entity-get-linked entity)))))))
 876
 877 (defun wl-thread-insert-entity (indent entity parent-entity all)
 878   "Insert thread entity in current buffer."
 879   (let ((msgs (list (car entity)))
 880         children msgs-stack)
 881     (while msgs
 882       (wl-thread-insert-entity-sub indent entity parent-entity all)
 883       (setq msgs (cdr msgs))
 884       (setq children (nth 2 entity))
 885       (if children
 886           ;; insert children
 887           (when (or wl-thread-insert-force-opened
 888                     (wl-thread-entity-get-opened entity))
 889             (wl-thread-entity-set-opened entity t)
 890             (wl-push msgs msgs-stack)
 891             (setq msgs children
 892                   indent (1+ indent)
 893                   parent-entity entity)))
 894       (unless msgs
 895         (while (and (null msgs) msgs-stack)
 896           (setq msgs (wl-pop msgs-stack))
 897           (setq indent (1- indent)))
 898         (when msgs
 899           (setq entity (wl-thread-get-entity (car msgs)))
 900           (setq parent-entity (wl-thread-entity-get-parent-entity entity))))
 901       (setq entity (wl-thread-get-entity (car msgs))))))
 902
 903 (defun wl-thread-descendant-p (mynumber number)
 904   (let ((cur (wl-thread-get-entity number))
 905         num)
 906     (catch 'done
 907       (while cur
 908         (setq cur (wl-thread-entity-get-parent-entity cur))
 909         (if (null (setq num (wl-thread-entity-get-number cur))) ; top!
 910             (throw 'done nil))
 911         (if (and num
 912                  (eq mynumber (wl-thread-entity-get-number cur)))
 913             (throw 'done t)))
 914       nil)))
 915
 916 ;; (defun wl-thread-goto-bottom-of-sub-thread ()
 917 ;;   (interactive)
 918 ;;   (let ((depth (wl-thread-get-depth-of-current-line)))
 919 ;;     (forward-line 1)
 920 ;;     (while (and (not (eobp))
 921 ;;              (> (wl-thread-get-depth-of-current-line)
 922 ;;                 depth))
 923 ;;       (forward-line 1))
 924 ;;     (beginning-of-line)))
 925
 926 (defun wl-thread-goto-bottom-of-sub-thread (&optional msg)
 927   (interactive)
 928   (let ((mynumber (or msg (wl-summary-message-number))))
 929     (forward-line 1)
 930     (while (wl-thread-descendant-p mynumber (wl-summary-message-number))
 931       (forward-line 1))
 932     (beginning-of-line)))
 933
 934 (defun wl-thread-remove-destination-region (beg end)
 935   (save-excursion
 936     (save-restriction
 937       (narrow-to-region beg end)
 938       (goto-char (point-min))
 939       (while (not (eobp))
 940         (let ((num (wl-summary-message-number)))
 941           (if (assq num wl-summary-buffer-refile-list)
 942               (wl-summary-remove-destination)))
 943         (forward-line 1)))))
 944
 945 (defun wl-thread-print-destination-region (beg end)
 946   (if (or wl-summary-buffer-refile-list
 947           wl-summary-buffer-copy-list)
 948       (save-excursion
 949         (save-restriction
 950           (narrow-to-region beg end)
 951           (goto-char (point-min))
 952           (while (not (eobp))
 953             (let ((num (wl-summary-message-number))
 954                   pair)
 955               (if (or (setq pair (assq num wl-summary-buffer-refile-list))
 956                       (setq pair (assq num wl-summary-buffer-copy-list)))
 957                   (wl-summary-print-destination (car pair) (cdr pair))))
 958             (forward-line 1))))))
 959
 960 (defsubst wl-thread-get-children-msgs (msg &optional visible-only)
 961   (let ((msgs (list msg))
 962         msgs-stack children
 963         entity ret-val)
 964     (while msgs
 965       (wl-append ret-val (list (car msgs)))
 966       (setq children (wl-thread-entity-get-children
 967                       (setq entity (wl-thread-get-entity (car msgs)))))
 968       (if (and visible-only
 969                (not (wl-thread-entity-get-opened entity)))
 970           (setq children nil))
 971       (setq msgs (cdr msgs))
 972       (if (null children)
 973           (while (and (null msgs) msgs-stack)
 974             (setq msgs (wl-pop msgs-stack)))
 975         (wl-push msgs msgs-stack)
 976         (setq msgs children)))
 977     ret-val))
 978
 979 (defun wl-thread-get-children-msgs-uncached (msg &optional uncached-marks)
 980   (let ((children-msgs (wl-thread-get-children-msgs msg))
 981         (number-alist (elmo-msgdb-get-number-alist (wl-summary-buffer-msgdb)))
 982         mark
 983         uncached-list)
 984     (while children-msgs
 985       (if (and (not (eq msg (car children-msgs))) ; except itself
 986                (or (and uncached-marks
 987                         (setq mark (elmo-msgdb-get-mark
 988                                     (wl-summary-buffer-msgdb)
 989                                     (car children-msgs)))
 990                         (member mark uncached-marks))
 991                    (and (not uncached-marks)
 992                         (null (elmo-file-cache-exists-p
 993                                (elmo-message-field
 994                                 wl-summary-buffer-elmo-folder
 995                                 (car children-msgs)
 996                                 'message-id))))))
 997           (wl-append uncached-list (list (car children-msgs))))
 998       (setq children-msgs (cdr children-msgs)))
 999     uncached-list))
1000
1001 (defun wl-thread-get-children-msgs-with-mark (msg mark)
1002   (let ((children-msgs (wl-thread-get-children-msgs msg))
1003         (check-func (cond ((string= mark "o")
1004                            'wl-summary-msg-marked-as-refiled)
1005                           ((string= mark "O")
1006                            'wl-summary-msg-marked-as-copied)
1007                           ((string= mark "D")
1008                            'wl-summary-msg-marked-as-deleted)
1009                           ((string= mark "*")
1010                            'wl-summary-msg-marked-as-target)))
1011         ret-val)
1012     (while children-msgs
1013       (if (funcall check-func (car children-msgs))
1014           (wl-append ret-val (list (car children-msgs))))
1015       (setq children-msgs (cdr children-msgs)))
1016     ret-val))
1017
1018 (defun wl-thread-close (entity)
1019   (let (depth beg)
1020     (wl-thread-entity-set-opened entity nil)
1021     (setq depth (wl-thread-get-depth-of-current-line))
1022     (beginning-of-line)
1023     (setq beg (point))
1024     (wl-thread-goto-bottom-of-sub-thread)
1025     (wl-thread-remove-destination-region beg
1026                                          (point))
1027     (forward-char -1)   ;; needed for mouse-face.
1028     (delete-region beg (point))
1029     (wl-thread-insert-entity (- depth 1)
1030                              entity
1031                              (wl-thread-get-entity
1032                               (nth 3 entity))
1033                              nil)
1034     (delete-char 1) ; delete '\n'
1035     (wl-thread-print-destination-region beg (point))))
1036
1037 (defun wl-thread-open (entity)
1038   (let (depth beg)
1039     (beginning-of-line)
1040     (setq beg (point))
1041     (setq depth (wl-thread-get-depth-of-current-line))
1042     (end-of-line)
1043     (delete-region beg (point))
1044     (wl-thread-entity-set-opened entity t)
1045     (wl-thread-insert-entity depth ;(- depth 1)
1046                              entity
1047                              (wl-thread-get-entity
1048                               (nth 3 entity)) nil)
1049     (delete-char 1) ; delete '\n'
1050     (wl-thread-print-destination-region beg (point))))
1051
1052 (defun wl-thread-open-close (&optional force-open)
1053   (interactive "P")
1054   (when (eq wl-summary-buffer-view 'thread)
1055 ;;; (if (equal wl-thread-top-entity '(nil t nil nil))
1056 ;;;     (error "There's no thread structure"))
1057     (save-excursion
1058       (let ((inhibit-read-only t)
1059             (buffer-read-only nil)
1060             (wl-thread-insert-force-opened
1061              (or wl-thread-insert-force-opened
1062                  force-open))
1063             msg entity parent)
1064         (setq msg (wl-summary-message-number))
1065         (setq entity (wl-thread-get-entity msg))
1066         (if (wl-thread-entity-get-opened entity)
1067             ;; if already opened, close its child!
1068           (if (wl-thread-entity-get-children entity)
1069               (wl-thread-close entity)
1070             ;; opened, but has no children, close its parent!
1071             (when (setq parent (wl-thread-entity-get-parent entity))
1072               (wl-summary-jump-to-msg parent)
1073               (wl-thread-close
1074                (wl-thread-get-entity (wl-summary-message-number)))))
1075           ;; if closed (or it is just a thread bottom message)
1076           ;; has children, open it!
1077           (if (wl-thread-entity-get-children entity)
1078               (wl-thread-open entity)
1079             ;; closed, and has no children, close its parent!
1080             (setq msg (or (wl-thread-entity-get-parent entity)
1081                           (wl-thread-entity-get-number entity)))
1082             (when msg
1083               (wl-summary-jump-to-msg msg)
1084               (wl-thread-close
1085                (wl-thread-get-entity (wl-summary-message-number)))))))
1086       (when wl-summary-lazy-highlight
1087         (wl-highlight-summary-window))
1088       (wl-summary-set-message-modified)
1089       (set-buffer-modified-p nil))))
1090
1091 (defun wl-thread-get-depth-of-current-line ()
1092   (let ((entity (wl-thread-get-entity (wl-summary-message-number)))
1093         (depth 0)
1094         number)
1095     (while (setq number (wl-thread-entity-get-parent entity))
1096       (incf depth)
1097       (setq entity (wl-thread-get-entity number)))
1098     depth))
1099
1100 (defun wl-thread-update-indent-string-region (beg end)
1101   (interactive "r")
1102   (save-excursion
1103     (goto-char beg)
1104     (while (< (point) end)
1105       (save-excursion
1106         (wl-thread-update-line-on-buffer-sub nil (wl-summary-message-number)))
1107       (forward-line 1))))
1108
1109 (defsubst wl-thread-make-indent-string (entity)
1110   (let ((cur entity)
1111         (ret-val "")
1112         (space-str (wl-repeat-string wl-thread-space-str-internal
1113                                      (- wl-thread-indent-level-internal 1)))
1114         parent)
1115     (when (wl-thread-entity-get-number
1116            (setq parent (wl-thread-entity-get-parent-entity cur)))
1117       (if (wl-thread-entity-get-younger-brothers cur)
1118           (setq ret-val wl-thread-have-younger-brother-str-internal)
1119         (setq ret-val wl-thread-youngest-child-str-internal))
1120       (setq ret-val (concat ret-val
1121                             (wl-repeat-string
1122                              wl-thread-horizontal-str-internal
1123                              (- wl-thread-indent-level-internal 1))))
1124       (setq cur parent)
1125       (while (wl-thread-entity-get-number
1126               (wl-thread-entity-get-parent-entity cur))
1127         (if (wl-thread-entity-get-younger-brothers cur)
1128             (setq ret-val (concat wl-thread-vertical-str-internal
1129                                   space-str
1130                                   ret-val))
1131           (setq ret-val (concat wl-thread-space-str-internal
1132                                 space-str
1133                                 ret-val)))
1134         (setq cur (wl-thread-entity-get-parent-entity cur))))
1135     ret-val))
1136
1137 (defun wl-thread-set-parent (&optional parent-number)
1138   "Set current message's parent interactively."
1139   (interactive)
1140   (let ((number (wl-summary-message-number))
1141         (dst-parent (if (interactive-p)
1142                         (read-from-minibuffer "Parent Message (No.): ")))
1143         entity dst-parent-entity src-parent children
1144         update-msgs
1145         buffer-read-only)
1146     (if (string= dst-parent "")
1147         (setq dst-parent nil)
1148       (if (interactive-p)
1149           (setq dst-parent (string-to-int dst-parent))
1150         (setq dst-parent parent-number)))
1151     (if (and dst-parent
1152              (memq dst-parent (wl-thread-get-children-msgs number)))
1153         (error "Parent is children or myself"))
1154     (setq entity (wl-thread-get-entity number))
1155     (when (and number entity)
1156       ;; delete thread
1157       (setq update-msgs (wl-thread-delete-message number 'deep))
1158       ;; insert as child at new parent
1159       (setq dst-parent-entity (wl-thread-get-entity dst-parent))
1160       (if dst-parent-entity
1161           (progn
1162             (if (setq children
1163                       (wl-thread-entity-get-children dst-parent-entity))
1164                 (wl-append update-msgs
1165                            (wl-thread-get-children-msgs
1166                             (car (last children)) t)))
1167             (wl-thread-entity-set-children
1168              dst-parent-entity
1169              (append children (list number)))
1170             (wl-thread-entity-set-linked entity t))
1171         ;; insert as top
1172         (wl-append wl-thread-entity-list (list number))
1173         (wl-thread-entity-set-linked entity nil))
1174
1175       ;; update my thread
1176       (wl-append update-msgs (wl-thread-get-children-msgs number t))
1177       (setq update-msgs (elmo-uniq-list update-msgs))
1178       (wl-thread-entity-set-parent entity dst-parent)
1179       ;; update thread on buffer
1180       (wl-thread-update-line-msgs update-msgs t))))
1181
1182 (require 'product)
1183 (product-provide (provide 'wl-thread) (require 'wl-version))
1184
1185 ;;; wl-thread.el ends here