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