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         print-length)
 124     (save-excursion
 125       (set-buffer tmp-buffer)
 126       (erase-buffer)
 127       (when (file-writable-p top-file)
 128         (prin1 entity tmp-buffer)
 129         (princ "\n" tmp-buffer)
 130         (write-region (point-min) (point-max) top-file nil 'no-msg)
 131         (kill-buffer tmp-buffer)))))
 132
 133 (defun wl-thread-save-entities (dir)
 134   (let ((top-file (expand-file-name wl-thread-entity-file dir))
 135         (entities wl-thread-entities)
 136         (tmp-buffer (get-buffer-create " *wl-thread-save-entities*"))
 137         print-length print-level)
 138     (save-excursion
 139       (set-buffer tmp-buffer)
 140       (erase-buffer)
 141       (when (file-writable-p top-file)
 142         (prin1 entities tmp-buffer)
 143         (princ "\n" tmp-buffer)
 144         (write-region (point-min) (point-max) top-file nil 'no-msg)
 145         (kill-buffer tmp-buffer)))))
 146
 147 (defsubst wl-thread-entity-get-number (entity)
 148   (nth 0 entity))
 149 (defsubst wl-thread-entity-get-opened (entity)
 150   (nth 1 entity))
 151 (defsubst wl-thread-entity-get-children (entity)
 152   (nth 2 entity))
 153 (defsubst wl-thread-entity-get-parent (entity)
 154   (nth 3 entity))
 155 (defsubst wl-thread-entity-get-linked (entity)
 156   (nth 4 entity))
 157
 158 (defsubst wl-thread-create-entity (num parent &optional opened linked)
 159   (list num (or opened wl-thread-insert-opened) nil parent linked))
 160
 161 (defsubst wl-thread-get-entity (num)
 162   (and num
 163        (elmo-get-hash-val (format "#%d" num) wl-thread-entity-hashtb)))
 164
 165 (defsubst wl-thread-entity-set-parent (entity parent)
 166   (setcar (cdddr entity) parent)
 167   entity)
 168
 169 (defsubst wl-thread-entity-set-children (entity children)
 170   (setcar (cddr entity) children))
 171
 172 (defsubst wl-thread-entity-set-linked (entity linked)
 173   (if (cddddr entity)
 174       (setcar (cddddr entity) linked)
 175     (nconc entity (list linked)))
 176   entity)
 177
 178 (defsubst wl-thread-reparent-children (children parent)
 179   (while children
 180     (wl-thread-entity-set-parent
 181      (wl-thread-get-entity (car children)) parent)
 182     (wl-thread-entity-set-linked
 183      (wl-thread-get-entity (car children)) t)
 184     (setq children (cdr children))))
 185
 186 (defsubst wl-thread-entity-insert-as-top (entity)
 187   (when (and entity
 188              (car entity))
 189     (wl-append wl-thread-entity-list (list (car entity)))
 190     (setq wl-thread-entities (cons entity wl-thread-entities))
 191     (setq wl-summary-buffer-number-list
 192           (nconc wl-summary-buffer-number-list (list (car entity))))
 193     (elmo-set-hash-val (format "#%d" (car entity)) entity
 194                        wl-thread-entity-hashtb)))
 195
 196 (defsubst wl-thread-entity-insert-as-children (to entity)
 197   (let ((children (wl-thread-entity-get-children to))
 198         curp curc)
 199     (setq curp to)
 200     (elmo-list-insert wl-summary-buffer-number-list
 201                       (wl-thread-entity-get-number entity)
 202                       (progn
 203                         (while (setq curc
 204                                      (wl-thread-entity-get-children curp))
 205                           (setq curp (wl-thread-get-entity
 206                                       (nth (- (length curc) 1)
 207                                            curc))))
 208                         (wl-thread-entity-get-number curp)))
 209     (setcar (cddr to) (wl-append children
 210                                  (list (car entity))))
 211     (setq wl-thread-entities (cons entity wl-thread-entities))
 212     (elmo-set-hash-val (format "#%d" (car entity)) entity
 213                        wl-thread-entity-hashtb)))
 214
 215 (defsubst wl-thread-entity-set-opened (entity opened)
 216   (setcar (cdr entity) opened))
 217
 218 (defsubst wl-thread-entity-get-children-num (entity)
 219   (let (children
 220         ret-val msgs-stack
 221         (msgs (list (car entity))))
 222    (while msgs
 223      (setq msgs (cdr msgs))
 224      (setq children (wl-thread-entity-get-children entity))
 225      (if (null children)
 226          (while (and (null msgs) msgs-stack)
 227            (setq msgs (wl-pop msgs-stack)))
 228        (setq ret-val (+ (or ret-val 0) (length children)))
 229        (wl-push msgs msgs-stack)
 230        (setq msgs children))
 231      (setq entity (wl-thread-get-entity (car msgs))))
 232    ret-val))
 233
 234 (defsubst wl-thread-entity-get-descendant (entity)
 235   (let (children
 236         ret-val msgs-stack
 237         (msgs (list (car entity))))
 238    (while msgs
 239      (setq msgs (cdr msgs))
 240      (setq children (wl-thread-entity-get-children entity))
 241      (if (null children)
 242          (while (and (null msgs) msgs-stack)
 243            (setq msgs (wl-pop msgs-stack)))
 244        (setq ret-val (append ret-val (copy-sequence children)))
 245        (wl-push msgs msgs-stack)
 246        (setq msgs children))
 247      (setq entity (wl-thread-get-entity (car msgs))))
 248    ret-val))
 249
 250 (defsubst wl-thread-entity-get-parent-entity (entity)
 251   (wl-thread-get-entity (wl-thread-entity-get-parent entity)))
 252
 253 (defun wl-thread-entity-get-top-entity (entity)
 254   (let ((cur-entity entity)
 255         p-num)
 256     (while (setq p-num (wl-thread-entity-get-parent cur-entity))
 257       (setq cur-entity (wl-thread-get-entity p-num)))
 258     cur-entity))
 259
 260 (defun wl-thread-entity-parent-invisible-p (entity)
 261   "If parent of ENTITY is invisible, the top invisible ancestor entity of
 262 ENTITY is returned."
 263   (let ((cur-entity entity)
 264         top)
 265     (catch 'done
 266       (while (setq cur-entity (wl-thread-entity-get-parent-entity
 267                                cur-entity))
 268         (if (null (wl-thread-entity-get-number cur-entity))
 269             (throw 'done nil)
 270           (when (not (wl-thread-entity-get-opened cur-entity))
 271             (setq top cur-entity)))))
 272     top))
 273
 274 (defun wl-thread-entity-get-nearly-older-brother (entity &optional parent)
 275   (let ((brothers (wl-thread-entity-get-older-brothers entity parent)))
 276     (when brothers
 277       (car (last brothers)))))
 278
 279 (defun wl-thread-entity-get-older-brothers (entity &optional parent)
 280   (let* ((parent (or parent
 281                      (wl-thread-entity-get-parent-entity entity)))
 282          (brothers (wl-thread-entity-get-children parent))
 283          ret-val)
 284     (if parent
 285         brothers
 286       (setq brothers wl-thread-entity-list))
 287     (while (and brothers
 288                 (not (eq (wl-thread-entity-get-number entity)
 289                          (car brothers))))
 290       (wl-append ret-val (list (car brothers)))
 291       (setq brothers (cdr brothers)))
 292     ret-val))
 293
 294 (defun wl-thread-entity-get-younger-brothers (entity &optional parent)
 295   (let* ((parent (or parent
 296                      (wl-thread-entity-get-parent-entity entity)))
 297          (brothers (wl-thread-entity-get-children parent)))
 298     (if parent
 299         (cdr (memq (wl-thread-entity-get-number entity)
 300                    brothers))
 301       ;; top!!
 302       (cdr (memq (car entity) wl-thread-entity-list)))))
 303
 304 (defun wl-thread-jump-to-msg (&optional number)
 305   (interactive)
 306   (let ((num (or number
 307                  (string-to-int
 308                   (read-from-minibuffer "Jump to Message(No.): ")))))
 309     (wl-thread-entity-force-open (wl-thread-get-entity num))
 310     (wl-summary-jump-to-msg num)))
 311
 312 (defun wl-thread-close-all ()
 313   "Close all top threads."
 314   (interactive)
 315   (message "Closing all threads...")
 316   (save-excursion
 317     (let ((entities wl-thread-entity-list)
 318           (cur 0)
 319           (len (length wl-thread-entity-list)))
 320       (while entities
 321         (when (and (wl-thread-entity-get-opened (wl-thread-get-entity
 322                                                  (car entities)))
 323                    (wl-thread-entity-get-children (wl-thread-get-entity
 324                                                    (car entities))))
 325           (wl-summary-jump-to-msg (car entities))
 326           (wl-thread-open-close))
 327         (when (> len elmo-display-progress-threshold)
 328           (setq cur (1+ cur))
 329           (if (or (zerop (% cur 5)) (= cur len))
 330               (elmo-display-progress
 331                'wl-thread-close-all "Closing all threads..."
 332                (/ (* cur 100) len))))
 333         (setq entities (cdr entities)))))
 334   (message "Closing all threads...done"))
 335
 336 (defun wl-thread-open-all ()
 337   "Open all threads."
 338   (interactive)
 339   (message "Opening all threads...")
 340   (save-excursion
 341     (goto-char (point-min))
 342     (let ((len (count-lines (point-min) (point-max)))
 343           (cur 0)
 344           entity)
 345       (while (not (eobp))
 346         (if (wl-thread-entity-get-opened
 347              (setq entity (wl-thread-get-entity
 348                            (wl-summary-message-number))))
 349             (forward-line 1)
 350           (wl-thread-force-open)
 351           (wl-thread-goto-bottom-of-sub-thread))
 352         (when (> len elmo-display-progress-threshold)
 353           (setq cur (1+ cur))
 354           (elmo-display-progress
 355            'wl-thread-open-all "Opening all threads..."
 356            (/ (* cur 100) len)))))
 357     ;; Make sure to be 100%.
 358     (elmo-display-progress
 359      'wl-thread-open-all "Opening all threads..."
 360      100))
 361   (message "Opening all threads...done"))
 362
 363 (defun wl-thread-open-all-unread ()
 364   (interactive)
 365   (dolist (number (elmo-folder-list-messages-mark-match
 366                    wl-summary-buffer-elmo-folder
 367                    (wl-regexp-opt (list wl-summary-unread-uncached-mark
 368                                         wl-summary-unread-cached-mark
 369                                         wl-summary-new-mark
 370                                         wl-summary-important-mark))))
 371     (wl-thread-entity-force-open (wl-thread-get-entity number))))
 372
 373 (defsubst wl-thread-maybe-get-children-num (msg)
 374   (let ((entity (wl-thread-get-entity msg)))
 375     (if (not (wl-thread-entity-get-opened entity))
 376         (wl-thread-entity-get-children-num entity))))
 377
 378 (defsubst wl-thread-update-line-on-buffer-sub (entity msg &optional parent-msg)
 379   (let* ((entity (or entity (wl-thread-get-entity msg)))
 380          (parent-msg (or parent-msg (wl-thread-entity-get-parent entity)))
 381          (overview (elmo-msgdb-get-overview (wl-summary-buffer-msgdb)))
 382          (buffer-read-only nil)
 383          (inhibit-read-only t)
 384          overview-entity temp-mark summary-line invisible-top dest-pair)
 385     (if (wl-thread-delete-line-from-buffer msg)
 386         (progn
 387           (cond
 388            ((memq msg wl-summary-buffer-delete-list)
 389             (setq temp-mark "D"))
 390            ((memq msg wl-summary-buffer-target-mark-list)
 391             (setq temp-mark "*"))
 392            ((setq dest-pair (assq msg wl-summary-buffer-refile-list))
 393             (setq temp-mark "o"))
 394            ((setq dest-pair (assq msg wl-summary-buffer-copy-list))
 395             (setq temp-mark "O"))
 396            (t (setq temp-mark (wl-summary-get-score-mark msg))))
 397           (when (setq overview-entity
 398                       (elmo-msgdb-overview-get-entity
 399                        msg (wl-summary-buffer-msgdb)))
 400             (wl-summary-insert-line
 401              (wl-summary-create-line
 402               overview-entity
 403               (elmo-msgdb-overview-get-entity
 404                parent-msg (wl-summary-buffer-msgdb))
 405               temp-mark
 406               (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg)
 407               (if wl-thread-insert-force-opened
 408                   nil
 409                 (wl-thread-maybe-get-children-num msg))
 410               (wl-thread-make-indent-string entity)
 411               (wl-thread-entity-get-linked entity)))
 412             (if dest-pair
 413                 (wl-summary-print-destination (car dest-pair)
 414                                               (cdr dest-pair)))))
 415       ;; insert thread (moving thread)
 416       (if (not (setq invisible-top
 417                      (wl-thread-entity-parent-invisible-p entity)))
 418           (wl-summary-update-thread
 419            (elmo-msgdb-overview-get-entity msg (wl-summary-buffer-msgdb))
 420            entity
 421            (and parent-msg
 422                 (elmo-msgdb-overview-get-entity
 423                  parent-msg (wl-summary-buffer-msgdb))))
 424         ;; currently invisible.. update closed line.
 425         (wl-thread-update-children-number invisible-top)))))
 426
 427 (defun wl-thread-update-line-on-buffer (&optional msg parent-msg updates)
 428   (interactive)
 429   (let ((msgs (list (or msg (wl-summary-message-number))))
 430         entity children msgs-stack)
 431    (while msgs
 432     (setq msg (wl-pop msgs))
 433     (setq updates (and updates (delete msg updates)))
 434     (setq entity (wl-thread-get-entity msg))
 435     (wl-thread-update-line-on-buffer-sub entity msg parent-msg)
 436     ;;
 437     (setq children (wl-thread-entity-get-children entity))
 438     (if children
 439         ;; update children
 440         (when (wl-thread-entity-get-opened entity)
 441           (wl-push msgs msgs-stack)
 442           (setq parent-msg msg
 443                 msgs children))
 444       (unless msgs
 445         (while (and (null msgs) msgs-stack)
 446           (setq msgs (wl-pop msgs-stack)))
 447         (when msgs
 448           (setq parent-msg
 449                 (wl-thread-entity-get-number
 450                  (wl-thread-entity-get-parent-entity
 451                   (wl-thread-get-entity (car msgs)))))))))
 452    updates))
 453
 454 (defun wl-thread-update-line-msgs (msgs &optional no-msg)
 455   (wl-delete-all-overlays)
 456   (let ((i 0)
 457         (updates msgs)
 458         len)
 459 ;;; (while msgs
 460 ;;;   (setq updates
 461 ;;;         (append updates
 462 ;;;                 (wl-thread-get-children-msgs (car msgs))))
 463 ;;;   (setq msgs (cdr msgs)))
 464 ;;; (setq updates (elmo-uniq-list updates))
 465     (setq len (length updates))
 466     (while updates
 467       (wl-thread-update-line-on-buffer-sub nil (car updates))
 468       (setq updates (cdr updates))
 469       (when (and (not no-msg)
 470                  (> len elmo-display-progress-threshold))
 471         (setq i (1+ i))
 472         (if (or (zerop (% i 5)) (= i len))
 473             (elmo-display-progress
 474              'wl-thread-update-line-msgs "Updating deleted thread..."
 475              (/ (* i 100) len)))))))
 476
 477 (defun wl-thread-delete-line-from-buffer (msg)
 478   "Simply delete msg line."
 479   (let (beg)
 480     (if (wl-summary-jump-to-msg msg)
 481         (progn
 482           (setq beg (point))
 483           (forward-line 1)
 484           (delete-region beg (point))
 485           t)
 486       nil)))
 487
 488 (defun wl-thread-cleanup-symbols (msgs)
 489   (let (entity)
 490     (while msgs
 491       (when (setq entity (wl-thread-get-entity (car msgs)))
 492         ;; delete entity.
 493         (setq wl-thread-entities (delq entity wl-thread-entities))
 494         ;; free symbol.
 495         (elmo-clear-hash-val (format "#%d" (car msgs))
 496                              wl-thread-entity-hashtb))
 497       (setq msgs (cdr msgs)))))
 498
 499 (defun wl-thread-get-exist-children (msg &optional include-self)
 500   (let ((msgs (list msg))
 501         msgs-stack children
 502         entity ret-val)
 503     (while msgs
 504       (setq children (wl-thread-entity-get-children
 505                       (setq entity (wl-thread-get-entity (car msgs)))))
 506       (when (elmo-msgdb-overview-get-entity (car msgs)
 507                                             (wl-summary-buffer-msgdb))
 508         (wl-append ret-val (list (car msgs)))
 509         (setq children nil))
 510       (setq msgs (cdr msgs))
 511       (if (null children)
 512           (while (and (null msgs) msgs-stack)
 513             (setq msgs (wl-pop msgs-stack)))
 514         (wl-push msgs msgs-stack)
 515         (setq msgs children)))
 516     (unless include-self (setq ret-val (delq msg ret-val)))
 517     ret-val))
 518
 519 (defun wl-thread-delete-message (msg &optional deep update)
 520   "Delete MSG from entity and buffer."
 521   (save-excursion
 522     (let* ((entity (wl-thread-get-entity msg))
 523            children older-brothers younger-brothers top-child ;;grandchildren
 524            top-entity parent update-msgs beg invisible-top)
 525       (when entity
 526         (setq parent (wl-thread-entity-get-parent-entity entity))
 527         (if parent
 528             (progn
 529 ;;; has parent.
 530 ;;;           (setq brothers (wl-thread-entity-get-children parent))
 531               (setq older-brothers (wl-thread-entity-get-older-brothers
 532                                     entity parent))
 533               (setq younger-brothers (wl-thread-entity-get-younger-brothers
 534                                       entity parent))
 535               ;;
 536               (unless deep
 537                 (setq children (wl-thread-entity-get-children entity))
 538                 (wl-thread-reparent-children
 539                  children (wl-thread-entity-get-number parent))
 540                 (setq update-msgs
 541                       (apply (function nconc)
 542                              update-msgs
 543                              (mapcar
 544                               (function
 545                                (lambda (message)
 546                                  (wl-thread-get-children-msgs message t)))
 547                               children))))
 548               (wl-thread-entity-set-children
 549                parent (append older-brothers children younger-brothers))
 550               ;; If chidren and younger-brothers not exists,
 551               ;; update nearly older brother.
 552               (when (and older-brothers
 553                          (not younger-brothers)
 554                          (not children))
 555                 (wl-append
 556                  update-msgs
 557                  (wl-thread-get-children-msgs (car (last older-brothers))))))
 558
 559           ;; top...oldest child becomes top.
 560           (unless deep
 561             (setq children (wl-thread-entity-get-children entity))
 562             (when children
 563               (setq top-child (car children)
 564                     children (cdr children))
 565               (setq top-entity (wl-thread-get-entity top-child))
 566               (wl-thread-entity-set-parent top-entity nil)
 567               (wl-thread-entity-set-linked top-entity nil)
 568               (wl-append update-msgs
 569                          (wl-thread-get-children-msgs top-child t)))
 570             (when children
 571               (wl-thread-entity-set-children
 572                top-entity
 573                (append
 574                 (wl-thread-entity-get-children top-entity)
 575                 children))
 576               (wl-thread-reparent-children children top-child)
 577               (wl-append update-msgs children)))
 578           ;; delete myself from top list.
 579           (setq wl-summary-buffer-number-list
 580                 (delq msg wl-summary-buffer-number-list))
 581           (setq older-brothers (wl-thread-entity-get-older-brothers
 582                                 entity nil))
 583           (setq younger-brothers (wl-thread-entity-get-younger-brothers
 584                                   entity nil))
 585           (setq wl-thread-entity-list
 586                 (append (append older-brothers
 587                                 (and top-child (list top-child)))
 588                         younger-brothers))))
 589
 590       (if deep
 591           ;; delete thread on buffer
 592           (when (wl-summary-jump-to-msg msg)
 593             (setq beg (point))
 594             (wl-thread-goto-bottom-of-sub-thread)
 595             (delete-region beg (point)))
 596         ;; delete myself from buffer.
 597         (unless (wl-thread-delete-line-from-buffer msg)
 598           ;; jump to suitable point.
 599           ;; just upon the oldest younger-brother of my top.
 600           (setq invisible-top
 601                 (car (wl-thread-entity-parent-invisible-p entity)))
 602           (if invisible-top
 603               (progn
 604                 (wl-append update-msgs (list invisible-top))
 605                 (wl-summary-jump-to-msg invisible-top))
 606             (goto-char (point-max))))
 607
 608         ;; insert children if thread is closed or delete top.
 609         (when (or top-child
 610                   (not (wl-thread-entity-get-opened entity)))
 611           (let* (next-top insert-msgs ent e grandchildren)
 612             (if top-child
 613                 (progn
 614                   (setq insert-msgs (wl-thread-get-exist-children
 615                                      top-child 'include-self))
 616                   (setq next-top (car insert-msgs))
 617                   (setq ent (wl-thread-get-entity next-top))
 618                   (when (and
 619                          (wl-thread-entity-get-opened entity) ;; open
 620                          (not (wl-thread-entity-get-opened ent)) ;; close
 621                          (setq grandchildren
 622                                (wl-thread-entity-get-children ent))
 623                          (wl-summary-jump-to-msg next-top))
 624                     (forward-line 1)
 625                     (setq insert-msgs (append (cdr insert-msgs) grandchildren)))
 626                   (when top-entity (wl-thread-entity-set-opened top-entity t))
 627                   (when ent (wl-thread-entity-set-opened ent t)))
 628               (when (not invisible-top)
 629                 (setq insert-msgs (wl-thread-get-exist-children msg))
 630                 ;; First msg always opened, because first msg maybe becomes top.
 631                 (if (setq ent (wl-thread-get-entity (car insert-msgs)))
 632                     (wl-thread-entity-set-opened ent t))))
 633             ;; insert children
 634             (while insert-msgs
 635               ;; if no exists in summary, insert entity.
 636               (when (and (car insert-msgs)
 637                          (not (wl-summary-jump-to-msg (car insert-msgs))))
 638                 (setq ent (wl-thread-get-entity (car insert-msgs)))
 639                 (wl-thread-insert-entity 0 ; no mean now...
 640                                          ent entity nil))
 641               (setq insert-msgs (cdr insert-msgs))))))
 642       (if update
 643           ;; modify buffer.
 644           (while update-msgs
 645             (wl-thread-update-line-on-buffer-sub nil (pop update-msgs)))
 646         ;; don't update buffer
 647         update-msgs)))) ; return value
 648
 649 (defun wl-thread-insert-message (overview-entity
 650                                  msg parent-msg &optional update linked)
 651   "Insert MSG to the entity.
 652 When optional argument UPDATE is non-nil,
 653 Message is inserted to the summary buffer."
 654   (let ((parent (wl-thread-get-entity parent-msg))
 655         child-entity invisible-top)
 656 ;;; Update the thread view...not implemented yet.
 657 ;;;  (when force-insert
 658 ;;;    (if parent
 659 ;;;       (wl-thread-entity-force-open parent))
 660     (if parent
 661         ;; insert as children.
 662         (wl-thread-entity-insert-as-children
 663          parent
 664          (setq child-entity (wl-thread-create-entity
 665                              msg (nth 0 parent) nil linked)))
 666       ;; insert as top message.
 667       (wl-thread-entity-insert-as-top
 668        (wl-thread-create-entity msg nil)))
 669     (if update
 670         (if (not (setq invisible-top
 671                        (wl-thread-entity-parent-invisible-p child-entity)))
 672             ;; visible.
 673             (progn
 674               (wl-summary-update-thread
 675                overview-entity
 676                child-entity
 677                (elmo-msgdb-overview-get-entity
 678                 parent-msg (wl-summary-buffer-msgdb)))
 679               (when parent
 680                 ;; use thread structure.
 681                 ;;(wl-thread-entity-get-nearly-older-brother
 682                 ;; child-entity parent))) ; return value
 683                 (wl-thread-entity-get-number parent))) ; return value
 684 ;;;           (setq beg (point))
 685 ;;;           (wl-thread-goto-bottom-of-sub-thread)
 686 ;;;           (wl-thread-update-indent-string-region beg (point)))
 687           ;; currently invisible.. update closed line.
 688           (wl-thread-update-children-number invisible-top)
 689           nil))))
 690
 691 (defun wl-thread-get-parent-list (msgs)
 692   (let* ((msgs2 msgs)
 693          myself)
 694     (while msgs2
 695       (setq myself (car msgs2)
 696             msgs2 (cdr msgs2))
 697       (while (not (eq myself (car msgs2)))
 698         (if (wl-thread-descendant-p myself (car msgs2))
 699             (setq msgs (delq (car msgs2) msgs)))
 700         (setq msgs2 (or (cdr msgs2) msgs)))
 701       (setq msgs2 (cdr msgs2)))
 702     msgs))
 703
 704 (defun wl-thread-update-indent-string-thread (top-list)
 705   (let ((top-list (wl-thread-get-parent-list top-list))
 706         beg)
 707     (while top-list
 708       (when (car top-list)
 709         (wl-summary-jump-to-msg (car top-list))
 710         (setq beg (point))
 711         (wl-thread-goto-bottom-of-sub-thread)
 712         (wl-thread-update-indent-string-region beg (point)))
 713       (setq top-list (cdr top-list)))))
 714
 715 (defun wl-thread-update-children-number (entity)
 716   "Update the children number."
 717   (wl-thread-update-line-on-buffer (wl-thread-entity-get-number entity)))
 718
 719 ;;
 720 ;; Thread oriented commands.
 721 ;;
 722 (defun wl-thread-call-region-func (func &optional arg)
 723   (save-excursion
 724     (if arg
 725         (wl-summary-goto-top-of-current-thread)
 726       (beginning-of-line))
 727     (let ((beg (point)))
 728       (wl-thread-goto-bottom-of-sub-thread)
 729       (funcall func beg (point)))))
 730
 731 (defun wl-thread-prefetch (&optional arg)
 732   (interactive "P")
 733   (wl-thread-call-region-func 'wl-summary-prefetch-region arg))
 734
 735 (defun wl-thread-msg-mark-as-important (msg)
 736   "Set mark as important for invisible MSG. Modeline is not changed."
 737   (let ((msgdb (wl-summary-buffer-msgdb))
 738         cur-mark)
 739     (setq cur-mark (elmo-msgdb-get-mark msgdb msg))
 740     (elmo-msgdb-set-mark msgdb
 741                          msg
 742                          (if (string= cur-mark wl-summary-important-mark)
 743                              nil
 744                            wl-summary-important-mark))
 745     (wl-summary-set-mark-modified)))
 746
 747 (defun wl-thread-mark-as-read (&optional arg)
 748   (interactive "P")
 749   (wl-thread-call-region-func 'wl-summary-mark-as-read-region arg))
 750
 751 (defun wl-thread-mark-as-unread (&optional arg)
 752   (interactive "P")
 753   (wl-thread-call-region-func 'wl-summary-mark-as-unread-region arg))
 754
 755 (defun wl-thread-mark-as-important (&optional arg)
 756   (interactive "P")
 757   (wl-thread-call-region-func 'wl-summary-mark-as-important-region arg))
 758
 759 (defun wl-thread-copy (&optional arg)
 760   (interactive "P")
 761   (wl-thread-call-region-func 'wl-summary-copy-region arg))
 762
 763 (defun wl-thread-refile (&optional arg)
 764   (interactive "P")
 765   (condition-case err
 766       (progn
 767         (wl-thread-call-region-func 'wl-summary-refile-region arg)
 768         (if arg
 769             (wl-summary-goto-top-of-current-thread))
 770         (wl-thread-goto-bottom-of-sub-thread))
 771     (error
 772      (elmo-display-error err t)
 773      nil)))
 774
 775 (defun wl-thread-delete (&optional arg)
 776   (interactive "P")
 777   (wl-thread-call-region-func 'wl-summary-delete-region arg)
 778   (if arg
 779       (wl-summary-goto-top-of-current-thread))
 780   (if (not wl-summary-move-direction-downward)
 781       (wl-summary-prev)
 782     (wl-thread-goto-bottom-of-sub-thread)
 783     (if wl-summary-buffer-disp-msg
 784         (wl-summary-redisplay))))
 785
 786 (defun wl-thread-target-mark (&optional arg)
 787   (interactive "P")
 788   (wl-thread-call-region-func 'wl-summary-target-mark-region arg))
 789
 790 (defun wl-thread-unmark (&optional arg)
 791   (interactive "P")
 792   (wl-thread-call-region-func 'wl-summary-unmark-region arg))
 793
 794 (defun wl-thread-exec (&optional arg)
 795   (interactive "P")
 796   (wl-thread-call-region-func 'wl-summary-exec-region arg))
 797
 798 (defun wl-thread-save (&optional arg)
 799   (interactive "P")
 800   (wl-thread-call-region-func 'wl-summary-save-region arg))
 801
 802 (defun wl-thread-force-open (&optional msg-num)
 803   "force open current folder"
 804   (if msg-num
 805       (wl-summary-jump-to-msg msg-num))
 806   (let ((wl-thread-insert-force-opened t))
 807     (wl-thread-open-close)))
 808
 809 (defun wl-thread-entity-force-open (entity)
 810   (let ((wl-thread-insert-force-opened t)
 811         notopen)
 812     (if (null (wl-thread-entity-get-parent entity))
 813         ;; top!!
 814         (if (and (not (wl-thread-entity-get-opened entity))
 815                  (wl-thread-entity-get-children entity))
 816             (wl-thread-force-open (wl-thread-entity-get-number entity)))
 817       (if (setq notopen (wl-thread-entity-parent-invisible-p entity))
 818           (wl-thread-force-open (wl-thread-entity-get-number notopen))))))
 819
 820 (defun wl-thread-insert-top ()
 821   (let ((elist wl-thread-entity-list)
 822         (len (length wl-thread-entity-list))
 823         (cur 0))
 824     (wl-delete-all-overlays)
 825     (while elist
 826       (wl-thread-insert-entity
 827        0
 828        (wl-thread-get-entity (car elist))
 829        nil
 830        len)
 831       (setq elist (cdr elist))
 832       (when (> len elmo-display-progress-threshold)
 833         (setq cur (1+ cur))
 834         (if (or (zerop (% cur 2)) (= cur len))
 835             (elmo-display-progress
 836              'wl-thread-insert-top "Inserting thread..."
 837              (/ (* cur 100) len)))))))
 838
 839 (defsubst wl-thread-insert-entity-sub (indent entity parent-entity all)
 840   (let (msg-num
 841         overview-entity
 842         temp-mark
 843         summary-line)
 844     (when (setq msg-num (wl-thread-entity-get-number entity))
 845       (unless all ; all...means no temp-mark.
 846         (cond ((memq msg-num wl-summary-buffer-delete-list)
 847                (setq temp-mark "D"))
 848               ((memq msg-num wl-summary-buffer-target-mark-list)
 849                (setq temp-mark "*"))
 850               ((assq msg-num wl-summary-buffer-refile-list)
 851                (setq temp-mark "o"))
 852               ((assq msg-num wl-summary-buffer-copy-list)
 853                (setq temp-mark "O"))))
 854       (unless temp-mark
 855         (setq temp-mark (wl-summary-get-score-mark msg-num)))
 856       (setq overview-entity
 857             (elmo-msgdb-overview-get-entity
 858              (nth 0 entity) (wl-summary-buffer-msgdb)))
 859 ;;;   (wl-delete-all-overlays)
 860       (when overview-entity
 861         (wl-summary-insert-line
 862          (wl-summary-create-line
 863           overview-entity
 864           (elmo-msgdb-overview-get-entity
 865            (nth 0 parent-entity) (wl-summary-buffer-msgdb))
 866           temp-mark
 867           (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg-num)
 868           (if wl-thread-insert-force-opened
 869               nil
 870             (wl-thread-maybe-get-children-num msg-num))
 871           (wl-thread-make-indent-string entity)
 872           (wl-thread-entity-get-linked entity)))))))
 873
 874 (defun wl-thread-insert-entity (indent entity parent-entity all)
 875   "Insert thread entity in current buffer."
 876   (let ((msgs (list (car entity)))
 877         children msgs-stack)
 878     (while msgs
 879       (wl-thread-insert-entity-sub indent entity parent-entity all)
 880       (setq msgs (cdr msgs))
 881       (setq children (nth 2 entity))
 882       (if children
 883           ;; insert children
 884           (when (or wl-thread-insert-force-opened
 885                     (wl-thread-entity-get-opened entity))
 886             (wl-thread-entity-set-opened entity t)
 887             (wl-push msgs msgs-stack)
 888             (setq msgs children
 889                   indent (1+ indent)
 890                   parent-entity entity)))
 891       (unless msgs
 892         (while (and (null msgs) msgs-stack)
 893           (setq msgs (wl-pop msgs-stack))
 894           (setq indent (1- indent)))
 895         (when msgs
 896           (setq entity (wl-thread-get-entity (car msgs)))
 897           (setq parent-entity (wl-thread-entity-get-parent-entity entity))))
 898       (setq entity (wl-thread-get-entity (car msgs))))))
 899
 900 (defun wl-thread-descendant-p (mynumber number)
 901   (let ((cur (wl-thread-get-entity number))
 902         num)
 903     (catch 'done
 904       (while cur
 905         (setq cur (wl-thread-entity-get-parent-entity cur))
 906         (if (null (setq num (wl-thread-entity-get-number cur))) ; top!
 907             (throw 'done nil))
 908         (if (and num
 909                  (eq mynumber (wl-thread-entity-get-number cur)))
 910             (throw 'done t)))
 911       nil)))
 912
 913 ;; (defun wl-thread-goto-bottom-of-sub-thread ()
 914 ;;   (interactive)
 915 ;;   (let ((depth (wl-thread-get-depth-of-current-line)))
 916 ;;     (forward-line 1)
 917 ;;     (while (and (not (eobp))
 918 ;;              (> (wl-thread-get-depth-of-current-line)
 919 ;;                 depth))
 920 ;;       (forward-line 1))
 921 ;;     (beginning-of-line)))
 922
 923 (defun wl-thread-goto-bottom-of-sub-thread (&optional msg)
 924   (interactive)
 925   (let ((mynumber (or msg (wl-summary-message-number))))
 926     (forward-line 1)
 927     (while (wl-thread-descendant-p mynumber (wl-summary-message-number))
 928       (forward-line 1))
 929     (beginning-of-line)))
 930
 931 (defun wl-thread-remove-destination-region (beg end)
 932   (save-excursion
 933     (save-restriction
 934       (narrow-to-region beg end)
 935       (goto-char (point-min))
 936       (while (not (eobp))
 937         (let ((num (wl-summary-message-number)))
 938           (if (assq num wl-summary-buffer-refile-list)
 939               (wl-summary-remove-destination)))
 940         (forward-line 1)))))
 941
 942 (defun wl-thread-print-destination-region (beg end)
 943   (if (or wl-summary-buffer-refile-list
 944           wl-summary-buffer-copy-list)
 945       (save-excursion
 946         (save-restriction
 947           (narrow-to-region beg end)
 948           (goto-char (point-min))
 949           (while (not (eobp))
 950             (let ((num (wl-summary-message-number))
 951                   pair)
 952               (if (or (setq pair (assq num wl-summary-buffer-refile-list))
 953                       (setq pair (assq num wl-summary-buffer-copy-list)))
 954                   (wl-summary-print-destination (car pair) (cdr pair))))
 955             (forward-line 1))))))
 956
 957 (defsubst wl-thread-get-children-msgs (msg &optional visible-only)
 958   (let ((msgs (list msg))
 959         msgs-stack children
 960         entity ret-val)
 961     (while msgs
 962       (wl-append ret-val (list (car msgs)))
 963       (setq children (wl-thread-entity-get-children
 964                       (setq entity (wl-thread-get-entity (car msgs)))))
 965       (if (and visible-only
 966                (not (wl-thread-entity-get-opened entity)))
 967           (setq children nil))
 968       (setq msgs (cdr msgs))
 969       (if (null children)
 970           (while (and (null msgs) msgs-stack)
 971             (setq msgs (wl-pop msgs-stack)))
 972         (wl-push msgs msgs-stack)
 973         (setq msgs children)))
 974     ret-val))
 975
 976 (defun wl-thread-get-children-msgs-uncached (msg &optional uncached-marks)
 977   (let ((children-msgs (wl-thread-get-children-msgs msg))
 978         (number-alist (elmo-msgdb-get-number-alist (wl-summary-buffer-msgdb)))
 979         mark
 980         uncached-list)
 981     (while children-msgs
 982       (if (and (not (eq msg (car children-msgs))) ; except itself
 983                (or (and uncached-marks
 984                         (setq mark (elmo-msgdb-get-mark
 985                                     (wl-summary-buffer-msgdb)
 986                                     (car children-msgs)))
 987                         (member mark uncached-marks))
 988                    (and (not uncached-marks)
 989                         (null (elmo-file-cache-exists-p
 990                                (elmo-message-field
 991                                 wl-summary-buffer-elmo-folder
 992                                 (car children-msgs)
 993                                 'message-id))))))
 994           (wl-append uncached-list (list (car children-msgs))))
 995       (setq children-msgs (cdr children-msgs)))
 996     uncached-list))
 997
 998 (defun wl-thread-get-children-msgs-with-mark (msg mark)
 999   (let ((children-msgs (wl-thread-get-children-msgs msg))
1000         (check-func (cond ((string= mark "o")
1001                            'wl-summary-msg-marked-as-refiled)
1002                           ((string= mark "O")
1003                            'wl-summary-msg-marked-as-copied)
1004                           ((string= mark "D")
1005                            'wl-summary-msg-marked-as-deleted)
1006                           ((string= mark "*")
1007                            'wl-summary-msg-marked-as-target)))
1008         ret-val)
1009     (while children-msgs
1010       (if (funcall check-func (car children-msgs))
1011           (wl-append ret-val (list (car children-msgs))))
1012       (setq children-msgs (cdr children-msgs)))
1013     ret-val))
1014
1015 (defun wl-thread-close (entity)
1016   (let (depth beg)
1017     (wl-thread-entity-set-opened entity nil)
1018     (setq depth (wl-thread-get-depth-of-current-line))
1019     (beginning-of-line)
1020     (setq beg (point))
1021     (wl-thread-goto-bottom-of-sub-thread)
1022     (wl-thread-remove-destination-region beg
1023                                          (point))
1024     (forward-char -1)   ;; needed for mouse-face.
1025     (delete-region beg (point))
1026     (wl-thread-insert-entity (- depth 1)
1027                              entity
1028                              (wl-thread-get-entity
1029                               (nth 3 entity))
1030                              nil)
1031     (delete-char 1) ; delete '\n'
1032     (wl-thread-print-destination-region beg (point))))
1033
1034 (defun wl-thread-open (entity)
1035   (let (depth beg)
1036     (beginning-of-line)
1037     (setq beg (point))
1038     (setq depth (wl-thread-get-depth-of-current-line))
1039     (end-of-line)
1040     (delete-region beg (point))
1041     (wl-thread-entity-set-opened entity t)
1042     (wl-thread-insert-entity depth ;(- depth 1)
1043                              entity
1044                              (wl-thread-get-entity
1045                               (nth 3 entity)) nil)
1046     (delete-char 1) ; delete '\n'
1047     (wl-thread-print-destination-region beg (point))))
1048
1049 (defun wl-thread-open-close (&optional force-open)
1050   (interactive "P")
1051   (when (eq wl-summary-buffer-view 'thread)
1052 ;;; (if (equal wl-thread-top-entity '(nil t nil nil))
1053 ;;;     (error "There's no thread structure"))
1054     (save-excursion
1055       (let ((inhibit-read-only t)
1056             (buffer-read-only nil)
1057             (wl-thread-insert-force-opened
1058              (or wl-thread-insert-force-opened
1059                  force-open))
1060             msg entity parent)
1061         (setq msg (wl-summary-message-number))
1062         (setq entity (wl-thread-get-entity msg))
1063         (if (wl-thread-entity-get-opened entity)
1064             ;; if already opened, close its child!
1065           (if (wl-thread-entity-get-children entity)
1066               (wl-thread-close entity)
1067             ;; opened, but has no children, close its parent!
1068             (when (setq parent (wl-thread-entity-get-parent entity))
1069               (wl-summary-jump-to-msg parent)
1070               (wl-thread-close
1071                (wl-thread-get-entity (wl-summary-message-number)))))
1072           ;; if closed (or it is just a thread bottom message)
1073           ;; has children, open it!
1074           (if (wl-thread-entity-get-children entity)
1075               (wl-thread-open entity)
1076             ;; closed, and has no children, close its parent!
1077             (setq msg (or (wl-thread-entity-get-parent entity)
1078                           (wl-thread-entity-get-number entity)))
1079             (when msg
1080               (wl-summary-jump-to-msg msg)
1081               (wl-thread-close
1082                (wl-thread-get-entity (wl-summary-message-number)))))))
1083       (when wl-summary-lazy-highlight
1084         (wl-highlight-summary-window))
1085       (wl-summary-set-message-modified)
1086       (set-buffer-modified-p nil))))
1087
1088 (defun wl-thread-get-depth-of-current-line ()
1089   (let ((entity (wl-thread-get-entity (wl-summary-message-number)))
1090         (depth 0)
1091         number)
1092     (while (setq number (wl-thread-entity-get-parent entity))
1093       (incf depth)
1094       (setq entity (wl-thread-get-entity number)))
1095     depth))
1096
1097 (defun wl-thread-update-indent-string-region (beg end)
1098   (interactive "r")
1099   (save-excursion
1100     (goto-char beg)
1101     (while (< (point) end)
1102       (save-excursion
1103         (wl-thread-update-line-on-buffer-sub nil (wl-summary-message-number)))
1104       (forward-line 1))))
1105
1106 (defsubst wl-thread-make-indent-string (entity)
1107   (let ((cur entity)
1108         (ret-val "")
1109         (space-str (wl-repeat-string wl-thread-space-str-internal
1110                                      (- wl-thread-indent-level-internal 1)))
1111         parent)
1112     (when (wl-thread-entity-get-number
1113            (setq parent (wl-thread-entity-get-parent-entity cur)))
1114       (if (wl-thread-entity-get-younger-brothers cur)
1115           (setq ret-val wl-thread-have-younger-brother-str-internal)
1116         (setq ret-val wl-thread-youngest-child-str-internal))
1117       (setq ret-val (concat ret-val
1118                             (wl-repeat-string
1119                              wl-thread-horizontal-str-internal
1120                              (- wl-thread-indent-level-internal 1))))
1121       (setq cur parent)
1122       (while (wl-thread-entity-get-number
1123               (wl-thread-entity-get-parent-entity cur))
1124         (if (wl-thread-entity-get-younger-brothers cur)
1125             (setq ret-val (concat wl-thread-vertical-str-internal
1126                                   space-str
1127                                   ret-val))
1128           (setq ret-val (concat wl-thread-space-str-internal
1129                                 space-str
1130                                 ret-val)))
1131         (setq cur (wl-thread-entity-get-parent-entity cur))))
1132     ret-val))
1133
1134 (defun wl-thread-set-parent (&optional parent-number)
1135   "Set current message's parent interactively."
1136   (interactive)
1137   (let ((number (wl-summary-message-number))
1138         (dst-parent (if (interactive-p)
1139                         (read-from-minibuffer "Parent Message (No.): ")))
1140         entity dst-parent-entity src-parent children
1141         update-msgs
1142         buffer-read-only)
1143     (if (string= dst-parent "")
1144         (setq dst-parent nil)
1145       (if (interactive-p)
1146           (setq dst-parent (string-to-int dst-parent))
1147         (setq dst-parent parent-number)))
1148     (if (and dst-parent
1149              (memq dst-parent (wl-thread-get-children-msgs number)))
1150         (error "Parent is children or myself"))
1151     (setq entity (wl-thread-get-entity number))
1152     (when (and number entity)
1153       ;; delete thread
1154       (setq update-msgs (wl-thread-delete-message number 'deep))
1155       ;; insert as child at new parent
1156       (setq dst-parent-entity (wl-thread-get-entity dst-parent))
1157       (if dst-parent-entity
1158           (progn
1159             (if (setq children
1160                       (wl-thread-entity-get-children dst-parent-entity))
1161                 (wl-append update-msgs
1162                            (wl-thread-get-children-msgs
1163                             (car (last children)) t)))
1164             (wl-thread-entity-set-children
1165              dst-parent-entity
1166              (append children (list number)))
1167             (wl-thread-entity-set-linked entity t))
1168         ;; insert as top
1169         (wl-append wl-thread-entity-list (list number))
1170         (wl-thread-entity-set-linked entity nil))
1171
1172       ;; update my thread
1173       (wl-append update-msgs (wl-thread-get-children-msgs number t))
1174       (setq update-msgs (elmo-uniq-list update-msgs))
1175       (wl-thread-entity-set-parent entity dst-parent)
1176       ;; update thread on buffer
1177       (wl-thread-update-line-msgs update-msgs t))))
1178
1179 (require 'product)
1180 (product-provide (provide 'wl-thread) (require 'wl-version))
1181
1182 ;;; wl-thread.el ends here