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-flagged wl-summary-buffer-elmo-folder
 366                                             'digest 'in-msgdb))
 367     (wl-thread-entity-force-open (wl-thread-get-entity number))))
 368
 369 (defsubst wl-thread-maybe-get-children-num (msg)
 370   (let ((entity (wl-thread-get-entity msg)))
 371     (if (not (wl-thread-entity-get-opened entity))
 372         (wl-thread-entity-get-children-num entity))))
 373
 374 (defsubst wl-thread-update-line-on-buffer-sub (entity msg &optional parent-msg)
 375   (let* ((entity (or entity (wl-thread-get-entity msg)))
 376          (parent-msg (or parent-msg (wl-thread-entity-get-parent entity)))
 377          (overview (elmo-msgdb-get-overview (wl-summary-buffer-msgdb)))
 378          (buffer-read-only nil)
 379          (inhibit-read-only t)
 380          overview-entity temp-mark summary-line invisible-top dest-pair)
 381     (if (wl-thread-delete-line-from-buffer msg)
 382         (progn
 383           (cond
 384            ((memq msg wl-summary-buffer-delete-list)
 385             (setq temp-mark "D"))
 386            ((memq msg wl-summary-buffer-target-mark-list)
 387             (setq temp-mark "*"))
 388            ((setq dest-pair (assq msg wl-summary-buffer-refile-list))
 389             (setq temp-mark "o"))
 390            ((setq dest-pair (assq msg wl-summary-buffer-copy-list))
 391             (setq temp-mark "O"))
 392            (t (setq temp-mark (wl-summary-get-score-mark msg))))
 393           (when (setq overview-entity
 394                       (elmo-msgdb-overview-get-entity
 395                        msg (wl-summary-buffer-msgdb)))
 396             (wl-summary-insert-line
 397              (wl-summary-create-line
 398               overview-entity
 399               (elmo-msgdb-overview-get-entity
 400                parent-msg (wl-summary-buffer-msgdb))
 401               temp-mark
 402               (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg)
 403               (if wl-thread-insert-force-opened
 404                   nil
 405                 (wl-thread-maybe-get-children-num msg))
 406               (wl-thread-make-indent-string entity)
 407               (wl-thread-entity-get-linked entity)))
 408             (if dest-pair
 409                 (wl-summary-print-destination (car dest-pair)
 410                                               (cdr dest-pair)))))
 411       ;; insert thread (moving thread)
 412       (if (not (setq invisible-top
 413                      (wl-thread-entity-parent-invisible-p entity)))
 414           (wl-summary-update-thread
 415            (elmo-msgdb-overview-get-entity msg (wl-summary-buffer-msgdb))
 416            entity
 417            (and parent-msg
 418                 (elmo-msgdb-overview-get-entity
 419                  parent-msg (wl-summary-buffer-msgdb))))
 420         ;; currently invisible.. update closed line.
 421         (wl-thread-update-children-number invisible-top)))))
 422
 423 (defun wl-thread-update-line-on-buffer (&optional msg parent-msg updates)
 424   (interactive)
 425   (let ((msgs (list (or msg (wl-summary-message-number))))
 426         entity children msgs-stack)
 427    (while msgs
 428     (setq msg (wl-pop msgs))
 429     (setq updates (and updates (delete msg updates)))
 430     (setq entity (wl-thread-get-entity msg))
 431     (wl-thread-update-line-on-buffer-sub entity msg parent-msg)
 432     ;;
 433     (setq children (wl-thread-entity-get-children entity))
 434     (if children
 435         ;; update children
 436         (when (wl-thread-entity-get-opened entity)
 437           (wl-push msgs msgs-stack)
 438           (setq parent-msg msg
 439                 msgs children))
 440       (unless msgs
 441         (while (and (null msgs) msgs-stack)
 442           (setq msgs (wl-pop msgs-stack)))
 443         (when msgs
 444           (setq parent-msg
 445                 (wl-thread-entity-get-number
 446                  (wl-thread-entity-get-parent-entity
 447                   (wl-thread-get-entity (car msgs)))))))))
 448    updates))
 449
 450 (defun wl-thread-update-line-msgs (msgs &optional no-msg)
 451   (wl-delete-all-overlays)
 452   (let ((i 0)
 453         (updates msgs)
 454         len)
 455 ;;; (while msgs
 456 ;;;   (setq updates
 457 ;;;         (append updates
 458 ;;;                 (wl-thread-get-children-msgs (car msgs))))
 459 ;;;   (setq msgs (cdr msgs)))
 460 ;;; (setq updates (elmo-uniq-list updates))
 461     (setq len (length updates))
 462     (while updates
 463       (wl-thread-update-line-on-buffer-sub nil (car updates))
 464       (setq updates (cdr updates))
 465       (when (and (not no-msg)
 466                  (> len elmo-display-progress-threshold))
 467         (setq i (1+ i))
 468         (if (or (zerop (% i 5)) (= i len))
 469             (elmo-display-progress
 470              'wl-thread-update-line-msgs "Updating deleted thread..."
 471              (/ (* i 100) len)))))))
 472
 473 (defun wl-thread-delete-line-from-buffer (msg)
 474   "Simply delete msg line."
 475   (let (beg)
 476     (if (wl-summary-jump-to-msg msg)
 477         (progn
 478           (setq beg (point))
 479           (forward-line 1)
 480           (delete-region beg (point))
 481           t)
 482       nil)))
 483
 484 (defun wl-thread-cleanup-symbols (msgs)
 485   (let (entity)
 486     (while msgs
 487       (when (setq entity (wl-thread-get-entity (car msgs)))
 488         ;; delete entity.
 489         (setq wl-thread-entities (delq entity wl-thread-entities))
 490         ;; free symbol.
 491         (elmo-clear-hash-val (format "#%d" (car msgs))
 492                              wl-thread-entity-hashtb))
 493       (setq msgs (cdr msgs)))))
 494
 495 (defun wl-thread-get-exist-children (msg &optional include-self)
 496   (let ((msgs (list msg))
 497         msgs-stack children
 498         entity ret-val)
 499     (while msgs
 500       (setq children (wl-thread-entity-get-children
 501                       (setq entity (wl-thread-get-entity (car msgs)))))
 502       (when (elmo-msgdb-overview-get-entity (car msgs)
 503                                             (wl-summary-buffer-msgdb))
 504         (wl-append ret-val (list (car msgs)))
 505         (setq children nil))
 506       (setq msgs (cdr msgs))
 507       (if (null children)
 508           (while (and (null msgs) msgs-stack)
 509             (setq msgs (wl-pop msgs-stack)))
 510         (wl-push msgs msgs-stack)
 511         (setq msgs children)))
 512     (unless include-self (setq ret-val (delq msg ret-val)))
 513     ret-val))
 514
 515 (defun wl-thread-delete-message (msg &optional deep update)
 516   "Delete MSG from entity and buffer."
 517   (save-excursion
 518     (let* ((entity (wl-thread-get-entity msg))
 519            children older-brothers younger-brothers top-child ;;grandchildren
 520            top-entity parent update-msgs beg invisible-top)
 521       (when entity
 522         (setq parent (wl-thread-entity-get-parent-entity entity))
 523         (if parent
 524             (progn
 525 ;;; has parent.
 526 ;;;           (setq brothers (wl-thread-entity-get-children parent))
 527               (setq older-brothers (wl-thread-entity-get-older-brothers
 528                                     entity parent))
 529               (setq younger-brothers (wl-thread-entity-get-younger-brothers
 530                                       entity parent))
 531               ;;
 532               (unless deep
 533                 (setq children (wl-thread-entity-get-children entity))
 534                 (wl-thread-reparent-children
 535                  children (wl-thread-entity-get-number parent))
 536                 (setq update-msgs
 537                       (apply (function nconc)
 538                              update-msgs
 539                              (mapcar
 540                               (function
 541                                (lambda (message)
 542                                  (wl-thread-get-children-msgs message t)))
 543                               children))))
 544               (wl-thread-entity-set-children
 545                parent (append older-brothers children younger-brothers))
 546               ;; If chidren and younger-brothers not exists,
 547               ;; update nearly older brother.
 548               (when (and older-brothers
 549                          (not younger-brothers)
 550                          (not children))
 551                 (wl-append
 552                  update-msgs
 553                  (wl-thread-get-children-msgs (car (last older-brothers))))))
 554
 555           ;; top...oldest child becomes top.
 556           (unless deep
 557             (setq children (wl-thread-entity-get-children entity))
 558             (when children
 559               (setq top-child (car children)
 560                     children (cdr children))
 561               (setq top-entity (wl-thread-get-entity top-child))
 562               (wl-thread-entity-set-parent top-entity nil)
 563               (wl-thread-entity-set-linked top-entity nil)
 564               (wl-append update-msgs
 565                          (wl-thread-get-children-msgs top-child t)))
 566             (when children
 567               (wl-thread-entity-set-children
 568                top-entity
 569                (append
 570                 (wl-thread-entity-get-children top-entity)
 571                 children))
 572               (wl-thread-reparent-children children top-child)
 573               (wl-append update-msgs children)))
 574           ;; delete myself from top list.
 575           (setq wl-summary-buffer-number-list
 576                 (delq msg wl-summary-buffer-number-list))
 577           (setq older-brothers (wl-thread-entity-get-older-brothers
 578                                 entity nil))
 579           (setq younger-brothers (wl-thread-entity-get-younger-brothers
 580                                   entity nil))
 581           (setq wl-thread-entity-list
 582                 (append (append older-brothers
 583                                 (and top-child (list top-child)))
 584                         younger-brothers))))
 585
 586       (if deep
 587           ;; delete thread on buffer
 588           (when (wl-summary-jump-to-msg msg)
 589             (setq beg (point))
 590             (wl-thread-goto-bottom-of-sub-thread)
 591             (delete-region beg (point)))
 592         ;; delete myself from buffer.
 593         (unless (wl-thread-delete-line-from-buffer msg)
 594           ;; jump to suitable point.
 595           ;; just upon the oldest younger-brother of my top.
 596           (setq invisible-top
 597                 (car (wl-thread-entity-parent-invisible-p entity)))
 598           (if invisible-top
 599               (progn
 600                 (wl-append update-msgs (list invisible-top))
 601                 (wl-summary-jump-to-msg invisible-top))
 602             (goto-char (point-max))))
 603
 604         ;; insert children if thread is closed or delete top.
 605         (when (or top-child
 606                   (not (wl-thread-entity-get-opened entity)))
 607           (let* (next-top insert-msgs ent e grandchildren)
 608             (if top-child
 609                 (progn
 610                   (setq insert-msgs (wl-thread-get-exist-children
 611                                      top-child 'include-self))
 612                   (setq next-top (car insert-msgs))
 613                   (setq ent (wl-thread-get-entity next-top))
 614                   (when (and
 615                          (wl-thread-entity-get-opened entity) ;; open
 616                          (not (wl-thread-entity-get-opened ent)) ;; close
 617                          (setq grandchildren
 618                                (wl-thread-entity-get-children ent))
 619                          (wl-summary-jump-to-msg next-top))
 620                     (forward-line 1)
 621                     (setq insert-msgs (append (cdr insert-msgs) grandchildren)))
 622                   (when top-entity (wl-thread-entity-set-opened top-entity t))
 623                   (when ent (wl-thread-entity-set-opened ent t)))
 624               (when (not invisible-top)
 625                 (setq insert-msgs (wl-thread-get-exist-children msg))
 626                 ;; First msg always opened, because first msg maybe becomes top.
 627                 (if (setq ent (wl-thread-get-entity (car insert-msgs)))
 628                     (wl-thread-entity-set-opened ent t))))
 629             ;; insert children
 630             (while insert-msgs
 631               ;; if no exists in summary, insert entity.
 632               (when (and (car insert-msgs)
 633                          (not (wl-summary-jump-to-msg (car insert-msgs))))
 634                 (setq ent (wl-thread-get-entity (car insert-msgs)))
 635                 (wl-thread-insert-entity 0 ; no mean now...
 636                                          ent entity nil))
 637               (setq insert-msgs (cdr insert-msgs))))))
 638       (if update
 639           ;; modify buffer.
 640           (while update-msgs
 641             (wl-thread-update-line-on-buffer-sub nil (pop update-msgs)))
 642         ;; don't update buffer
 643         update-msgs)))) ; return value
 644
 645 (defun wl-thread-insert-message (overview-entity
 646                                  msg parent-msg &optional update linked)
 647   "Insert MSG to the entity.
 648 When optional argument UPDATE is non-nil,
 649 Message is inserted to the summary buffer."
 650   (let ((parent (wl-thread-get-entity parent-msg))
 651         (depth 0) cur
 652         child-entity invisible-top)
 653 ;;; Update the thread view...not implemented yet.
 654 ;;;  (when force-insert
 655 ;;;    (if parent
 656 ;;;       (wl-thread-entity-force-open parent))
 657     (when (and wl-summary-max-thread-depth parent)
 658       (setq cur parent)
 659       (while cur
 660         (incf depth)
 661         (setq cur (wl-thread-entity-get-parent-entity cur)))
 662       (when (> depth wl-summary-max-thread-depth)
 663         (setq parent nil)))
 664     (if parent
 665         ;; insert as children.
 666         (wl-thread-entity-insert-as-children
 667          parent
 668          (setq child-entity (wl-thread-create-entity
 669                              msg (nth 0 parent) nil linked)))
 670       ;; insert as top message.
 671       (wl-thread-entity-insert-as-top
 672        (wl-thread-create-entity msg nil)))
 673     (if update
 674         (if (not (setq invisible-top
 675                        (wl-thread-entity-parent-invisible-p child-entity)))
 676             ;; visible.
 677             (progn
 678               (wl-summary-update-thread
 679                overview-entity
 680                child-entity
 681                (elmo-msgdb-overview-get-entity
 682                 parent-msg (wl-summary-buffer-msgdb)))
 683               (when parent
 684                 ;; use thread structure.
 685                 ;;(wl-thread-entity-get-nearly-older-brother
 686                 ;; child-entity parent))) ; return value
 687                 (wl-thread-entity-get-number parent))) ; return value
 688 ;;;           (setq beg (point))
 689 ;;;           (wl-thread-goto-bottom-of-sub-thread)
 690 ;;;           (wl-thread-update-indent-string-region beg (point)))
 691           ;; currently invisible.. update closed line.
 692           (wl-thread-update-children-number invisible-top)
 693           nil))))
 694
 695 (defun wl-thread-get-parent-list (msgs)
 696   (let* ((msgs2 msgs)
 697          myself)
 698     (while msgs2
 699       (setq myself (car msgs2)
 700             msgs2 (cdr msgs2))
 701       (while (not (eq myself (car msgs2)))
 702         (if (wl-thread-descendant-p myself (car msgs2))
 703             (setq msgs (delq (car msgs2) msgs)))
 704         (setq msgs2 (or (cdr msgs2) msgs)))
 705       (setq msgs2 (cdr msgs2)))
 706     msgs))
 707
 708 (defun wl-thread-update-indent-string-thread (top-list)
 709   (let ((top-list (wl-thread-get-parent-list top-list))
 710         beg)
 711     (while top-list
 712       (when (car top-list)
 713         (wl-summary-jump-to-msg (car top-list))
 714         (setq beg (point))
 715         (wl-thread-goto-bottom-of-sub-thread)
 716         (wl-thread-update-indent-string-region beg (point)))
 717       (setq top-list (cdr top-list)))))
 718
 719 (defun wl-thread-update-children-number (entity)
 720   "Update the children number."
 721   (wl-thread-update-line-on-buffer (wl-thread-entity-get-number entity)))
 722
 723 ;;
 724 ;; Thread oriented commands.
 725 ;;
 726 (defun wl-thread-call-region-func (func &optional arg)
 727   (save-excursion
 728     (if arg
 729         (wl-summary-goto-top-of-current-thread)
 730       (beginning-of-line))
 731     (let ((beg (point)))
 732       (wl-thread-goto-bottom-of-sub-thread)
 733       (funcall func beg (point)))))
 734
 735 (defun wl-thread-prefetch (&optional arg)
 736   (interactive "P")
 737   (wl-thread-call-region-func 'wl-summary-prefetch-region arg))
 738
 739 (defun wl-thread-msg-mark-as-important (msg)
 740   "Set mark as important for invisible MSG. Modeline is not changed."
 741   (let ((msgdb (wl-summary-buffer-msgdb))
 742         cur-mark)
 743     (setq cur-mark (elmo-msgdb-get-mark msgdb msg))
 744     (elmo-msgdb-set-mark msgdb
 745                          msg
 746                          (if (string= cur-mark elmo-msgdb-important-mark)
 747                              nil
 748                            elmo-msgdb-important-mark))
 749     (wl-summary-set-mark-modified)))
 750
 751 (defun wl-thread-mark-as-read (&optional arg)
 752   (interactive "P")
 753   (wl-thread-call-region-func 'wl-summary-mark-as-read-region arg))
 754
 755 (defun wl-thread-mark-as-unread (&optional arg)
 756   (interactive "P")
 757   (wl-thread-call-region-func 'wl-summary-mark-as-unread-region arg))
 758
 759 (defun wl-thread-mark-as-important (&optional arg)
 760   (interactive "P")
 761   (wl-thread-call-region-func 'wl-summary-mark-as-important-region arg))
 762
 763 (defun wl-thread-copy (&optional arg)
 764   (interactive "P")
 765   (wl-thread-call-region-func 'wl-summary-copy-region arg))
 766
 767 (defun wl-thread-refile (&optional arg)
 768   (interactive "P")
 769   (condition-case err
 770       (progn
 771         (wl-thread-call-region-func 'wl-summary-refile-region arg)
 772         (if arg
 773             (wl-summary-goto-top-of-current-thread))
 774         (wl-thread-goto-bottom-of-sub-thread))
 775     (error
 776      (elmo-display-error err t)
 777      nil)))
 778
 779 (defun wl-thread-delete (&optional arg)
 780   (interactive "P")
 781   (wl-thread-call-region-func 'wl-summary-delete-region arg)
 782   (if arg
 783       (wl-summary-goto-top-of-current-thread))
 784   (if (not wl-summary-move-direction-downward)
 785       (wl-summary-prev)
 786     (wl-thread-goto-bottom-of-sub-thread)
 787     (if wl-summary-buffer-disp-msg
 788         (wl-summary-redisplay))))
 789
 790 (defun wl-thread-target-mark (&optional arg)
 791   (interactive "P")
 792   (wl-thread-call-region-func 'wl-summary-target-mark-region arg))
 793
 794 (defun wl-thread-unmark (&optional arg)
 795   (interactive "P")
 796   (wl-thread-call-region-func 'wl-summary-unmark-region arg))
 797
 798 (defun wl-thread-exec (&optional arg)
 799   (interactive "P")
 800   (wl-thread-call-region-func 'wl-summary-exec-region arg))
 801
 802 (defun wl-thread-save (&optional arg)
 803   (interactive "P")
 804   (wl-thread-call-region-func 'wl-summary-save-region arg))
 805
 806 (defun wl-thread-force-open (&optional msg-num)
 807   "force open current folder"
 808   (if msg-num
 809       (wl-summary-jump-to-msg msg-num))
 810   (let ((wl-thread-insert-force-opened t))
 811     (wl-thread-open-close)))
 812
 813 (defun wl-thread-entity-force-open (entity)
 814   (let ((wl-thread-insert-force-opened t)
 815         notopen)
 816     (if (null (wl-thread-entity-get-parent entity))
 817         ;; top!!
 818         (if (and (not (wl-thread-entity-get-opened entity))
 819                  (wl-thread-entity-get-children entity))
 820             (wl-thread-force-open (wl-thread-entity-get-number entity)))
 821       (if (setq notopen (wl-thread-entity-parent-invisible-p entity))
 822           (wl-thread-force-open (wl-thread-entity-get-number notopen))))))
 823
 824 (defun wl-thread-insert-top ()
 825   (let ((elist wl-thread-entity-list)
 826         (len (length wl-thread-entity-list))
 827         (cur 0))
 828     (wl-delete-all-overlays)
 829     (while elist
 830       (wl-thread-insert-entity
 831        0
 832        (wl-thread-get-entity (car elist))
 833        nil
 834        len)
 835       (setq elist (cdr elist))
 836       (when (> len elmo-display-progress-threshold)
 837         (setq cur (1+ cur))
 838         (if (or (zerop (% cur 2)) (= cur len))
 839             (elmo-display-progress
 840              'wl-thread-insert-top "Inserting message..."
 841              (/ (* cur 100) len)))))))
 842
 843 (defsubst wl-thread-insert-entity-sub (indent entity parent-entity all)
 844   (let (msg-num
 845         overview-entity
 846         temp-mark
 847         summary-line)
 848     (when (setq msg-num (wl-thread-entity-get-number entity))
 849       (unless all ; all...means no temp-mark.
 850         (cond ((memq msg-num wl-summary-buffer-delete-list)
 851                (setq temp-mark "D"))
 852               ((memq msg-num wl-summary-buffer-target-mark-list)
 853                (setq temp-mark "*"))
 854               ((assq msg-num wl-summary-buffer-refile-list)
 855                (setq temp-mark "o"))
 856               ((assq msg-num wl-summary-buffer-copy-list)
 857                (setq temp-mark "O"))))
 858       (unless temp-mark
 859         (setq temp-mark (wl-summary-get-score-mark msg-num)))
 860       (setq overview-entity
 861             (elmo-msgdb-overview-get-entity
 862              (nth 0 entity) (wl-summary-buffer-msgdb)))
 863 ;;;   (wl-delete-all-overlays)
 864       (when overview-entity
 865         (wl-summary-insert-line
 866          (wl-summary-create-line
 867           overview-entity
 868           (elmo-msgdb-overview-get-entity
 869            (nth 0 parent-entity) (wl-summary-buffer-msgdb))
 870           temp-mark
 871           (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg-num)
 872           (if wl-thread-insert-force-opened
 873               nil
 874             (wl-thread-maybe-get-children-num msg-num))
 875           (wl-thread-make-indent-string entity)
 876           (wl-thread-entity-get-linked entity)))))))
 877
 878 (defun wl-thread-insert-entity (indent entity parent-entity all)
 879   "Insert thread entity in current buffer."
 880   (let ((msgs (list (car entity)))
 881         children msgs-stack)
 882     (while msgs
 883       (wl-thread-insert-entity-sub indent entity parent-entity all)
 884       (setq msgs (cdr msgs))
 885       (setq children (nth 2 entity))
 886       (if children
 887           ;; insert children
 888           (when (or wl-thread-insert-force-opened
 889                     (wl-thread-entity-get-opened entity))
 890             (wl-thread-entity-set-opened entity t)
 891             (wl-push msgs msgs-stack)
 892             (setq msgs children
 893                   indent (1+ indent)
 894                   parent-entity entity)))
 895       (unless msgs
 896         (while (and (null msgs) msgs-stack)
 897           (setq msgs (wl-pop msgs-stack))
 898           (setq indent (1- indent)))
 899         (when msgs
 900           (setq entity (wl-thread-get-entity (car msgs)))
 901           (setq parent-entity (wl-thread-entity-get-parent-entity entity))))
 902       (setq entity (wl-thread-get-entity (car msgs))))))
 903
 904 (defun wl-thread-descendant-p (mynumber number)
 905   (let ((cur (wl-thread-get-entity number))
 906         num)
 907     (catch 'done
 908       (while cur
 909         (setq cur (wl-thread-entity-get-parent-entity cur))
 910         (if (null (setq num (wl-thread-entity-get-number cur))) ; top!
 911             (throw 'done nil))
 912         (if (and num
 913                  (eq mynumber (wl-thread-entity-get-number cur)))
 914             (throw 'done t)))
 915       nil)))
 916
 917 ;; (defun wl-thread-goto-bottom-of-sub-thread ()
 918 ;;   (interactive)
 919 ;;   (let ((depth (wl-thread-get-depth-of-current-line)))
 920 ;;     (forward-line 1)
 921 ;;     (while (and (not (eobp))
 922 ;;              (> (wl-thread-get-depth-of-current-line)
 923 ;;                 depth))
 924 ;;       (forward-line 1))
 925 ;;     (beginning-of-line)))
 926
 927 (defun wl-thread-goto-bottom-of-sub-thread (&optional msg)
 928   (interactive)
 929   (let ((mynumber (or msg (wl-summary-message-number))))
 930     (forward-line 1)
 931     (while (wl-thread-descendant-p mynumber (wl-summary-message-number))
 932       (forward-line 1))
 933     (beginning-of-line)))
 934
 935 (defun wl-thread-remove-destination-region (beg end)
 936   (save-excursion
 937     (save-restriction
 938       (narrow-to-region beg end)
 939       (goto-char (point-min))
 940       (while (not (eobp))
 941         (let ((num (wl-summary-message-number)))
 942           (if (assq num wl-summary-buffer-refile-list)
 943               (wl-summary-remove-destination)))
 944         (forward-line 1)))))
 945
 946 (defun wl-thread-print-destination-region (beg end)
 947   (if (or wl-summary-buffer-refile-list
 948           wl-summary-buffer-copy-list)
 949       (save-excursion
 950         (save-restriction
 951           (narrow-to-region beg end)
 952           (goto-char (point-min))
 953           (while (not (eobp))
 954             (let ((num (wl-summary-message-number))
 955                   pair)
 956               (if (or (setq pair (assq num wl-summary-buffer-refile-list))
 957                       (setq pair (assq num wl-summary-buffer-copy-list)))
 958                   (wl-summary-print-destination (car pair) (cdr pair))))
 959             (forward-line 1))))))
 960
 961 (defsubst wl-thread-get-children-msgs (msg &optional visible-only)
 962   (let ((msgs (list msg))
 963         msgs-stack children
 964         entity ret-val)
 965     (while msgs
 966       (wl-append ret-val (list (car msgs)))
 967       (setq children (wl-thread-entity-get-children
 968                       (setq entity (wl-thread-get-entity (car msgs)))))
 969       (if (and visible-only
 970                (not (wl-thread-entity-get-opened entity)))
 971           (setq children nil))
 972       (setq msgs (cdr msgs))
 973       (if (null children)
 974           (while (and (null msgs) msgs-stack)
 975             (setq msgs (wl-pop msgs-stack)))
 976         (wl-push msgs msgs-stack)
 977         (setq msgs children)))
 978     ret-val))
 979
 980 (defun wl-thread-get-children-msgs-uncached (msg &optional uncached-marks)
 981   (let ((children-msgs (wl-thread-get-children-msgs msg))
 982         (number-alist (elmo-msgdb-get-number-alist (wl-summary-buffer-msgdb)))
 983         mark
 984         uncached-list)
 985     (while children-msgs
 986       (if (and (not (eq msg (car children-msgs))) ; except itself
 987                (or (and uncached-marks
 988                         (setq mark (elmo-msgdb-get-mark
 989                                     (wl-summary-buffer-msgdb)
 990                                     (car children-msgs)))
 991                         (member mark uncached-marks))
 992                    (and (not uncached-marks)
 993                         (null (elmo-file-cache-exists-p
 994                                (elmo-message-field
 995                                 wl-summary-buffer-elmo-folder
 996                                 (car children-msgs)
 997                                 'message-id))))))
 998           (wl-append uncached-list (list (car children-msgs))))
 999       (setq children-msgs (cdr children-msgs)))
1000     uncached-list))
1001
1002 (defun wl-thread-get-children-msgs-with-mark (msg mark)
1003   (let ((children-msgs (wl-thread-get-children-msgs msg))
1004         (check-func (cond ((string= mark "o")
1005                            'wl-summary-msg-marked-as-refiled)
1006                           ((string= mark "O")
1007                            'wl-summary-msg-marked-as-copied)
1008                           ((string= mark "D")
1009                            'wl-summary-msg-marked-as-deleted)
1010                           ((string= mark "*")
1011                            'wl-summary-msg-marked-as-target)))
1012         ret-val)
1013     (while children-msgs
1014       (if (funcall check-func (car children-msgs))
1015           (wl-append ret-val (list (car children-msgs))))
1016       (setq children-msgs (cdr children-msgs)))
1017     ret-val))
1018
1019 (defun wl-thread-close (entity)
1020   (let (depth beg)
1021     (wl-thread-entity-set-opened entity nil)
1022     (setq depth (wl-thread-get-depth-of-current-line))
1023     (beginning-of-line)
1024     (setq beg (point))
1025     (wl-thread-goto-bottom-of-sub-thread)
1026     (wl-thread-remove-destination-region beg
1027                                          (point))
1028     (forward-char -1)   ;; needed for mouse-face.
1029     (delete-region beg (point))
1030     (wl-thread-insert-entity (- depth 1)
1031                              entity
1032                              (wl-thread-get-entity
1033                               (nth 3 entity))
1034                              nil)
1035     (delete-char 1) ; delete '\n'
1036     (wl-thread-print-destination-region beg (point))))
1037
1038 (defun wl-thread-open (entity)
1039   (let (depth beg)
1040     (beginning-of-line)
1041     (setq beg (point))
1042     (setq depth (wl-thread-get-depth-of-current-line))
1043     (end-of-line)
1044     (delete-region beg (point))
1045     (wl-thread-entity-set-opened entity t)
1046     (wl-thread-insert-entity depth ;(- depth 1)
1047                              entity
1048                              (wl-thread-get-entity
1049                               (nth 3 entity)) nil)
1050     (delete-char 1) ; delete '\n'
1051     (wl-thread-print-destination-region beg (point))))
1052
1053 (defun wl-thread-open-close (&optional force-open)
1054   (interactive "P")
1055   (when (eq wl-summary-buffer-view 'thread)
1056 ;;; (if (equal wl-thread-top-entity '(nil t nil nil))
1057 ;;;     (error "There's no thread structure"))
1058     (save-excursion
1059       (let ((inhibit-read-only t)
1060             (buffer-read-only nil)
1061             (wl-thread-insert-force-opened
1062              (or wl-thread-insert-force-opened
1063                  force-open))
1064             msg entity parent)
1065         (setq msg (wl-summary-message-number))
1066         (setq entity (wl-thread-get-entity msg))
1067         (if (wl-thread-entity-get-opened entity)
1068             ;; if already opened, close its child!
1069           (if (wl-thread-entity-get-children entity)
1070               (wl-thread-close entity)
1071             ;; opened, but has no children, close its parent!
1072             (when (setq parent (wl-thread-entity-get-parent entity))
1073               (wl-summary-jump-to-msg parent)
1074               (wl-thread-close
1075                (wl-thread-get-entity (wl-summary-message-number)))))
1076           ;; if closed (or it is just a thread bottom message)
1077           ;; has children, open it!
1078           (if (wl-thread-entity-get-children entity)
1079               (wl-thread-open entity)
1080             ;; closed, and has no children, close its parent!
1081             (setq msg (or (wl-thread-entity-get-parent entity)
1082                           (wl-thread-entity-get-number entity)))
1083             (when msg
1084               (wl-summary-jump-to-msg msg)
1085               (wl-thread-close
1086                (wl-thread-get-entity (wl-summary-message-number)))))))
1087       (when wl-summary-lazy-highlight
1088         (wl-highlight-summary-window))
1089       (wl-summary-set-message-modified)
1090       (set-buffer-modified-p nil))))
1091
1092 (defun wl-thread-get-depth-of-current-line ()
1093   (let ((entity (wl-thread-get-entity (wl-summary-message-number)))
1094         (depth 0)
1095         number)
1096     (while (setq number (wl-thread-entity-get-parent entity))
1097       (incf depth)
1098       (setq entity (wl-thread-get-entity number)))
1099     depth))
1100
1101 (defun wl-thread-update-indent-string-region (beg end)
1102   (interactive "r")
1103   (save-excursion
1104     (goto-char beg)
1105     (while (< (point) end)
1106       (save-excursion
1107         (wl-thread-update-line-on-buffer-sub nil (wl-summary-message-number)))
1108       (forward-line 1))))
1109
1110 (defsubst wl-thread-make-indent-string (entity)
1111   (let ((cur entity)
1112         (ret-val "")
1113         (space-str (wl-repeat-string wl-thread-space-str-internal
1114                                      (- wl-thread-indent-level-internal 1)))
1115         parent)
1116     (when (wl-thread-entity-get-number
1117            (setq parent (wl-thread-entity-get-parent-entity cur)))
1118       (if (wl-thread-entity-get-younger-brothers cur)
1119           (setq ret-val wl-thread-have-younger-brother-str-internal)
1120         (setq ret-val wl-thread-youngest-child-str-internal))
1121       (setq ret-val (concat ret-val
1122                             (wl-repeat-string
1123                              wl-thread-horizontal-str-internal
1124                              (- wl-thread-indent-level-internal 1))))
1125       (setq cur parent)
1126       (while (wl-thread-entity-get-number
1127               (wl-thread-entity-get-parent-entity cur))
1128         (if (wl-thread-entity-get-younger-brothers cur)
1129             (setq ret-val (concat wl-thread-vertical-str-internal
1130                                   space-str
1131                                   ret-val))
1132           (setq ret-val (concat wl-thread-space-str-internal
1133                                 space-str
1134                                 ret-val)))
1135         (setq cur (wl-thread-entity-get-parent-entity cur))))
1136     ret-val))
1137
1138 (defun wl-thread-set-parent (&optional parent-number)
1139   "Set current message's parent interactively."
1140   (interactive)
1141   (let ((number (wl-summary-message-number))
1142         (dst-parent (if (interactive-p)
1143                         (read-from-minibuffer "Parent Message (No.): ")))
1144         entity dst-parent-entity src-parent children
1145         update-msgs
1146         buffer-read-only)
1147     (if (string= dst-parent "")
1148         (setq dst-parent nil)
1149       (if (interactive-p)
1150           (setq dst-parent (string-to-int dst-parent))
1151         (setq dst-parent parent-number)))
1152     (if (and dst-parent
1153              (memq dst-parent (wl-thread-get-children-msgs number)))
1154         (error "Parent is children or myself"))
1155     (setq entity (wl-thread-get-entity number))
1156     (when (and number entity)
1157       ;; delete thread
1158       (setq update-msgs (wl-thread-delete-message number 'deep))
1159       ;; insert as child at new parent
1160       (setq dst-parent-entity (wl-thread-get-entity dst-parent))
1161       (if dst-parent-entity
1162           (progn
1163             (if (setq children
1164                       (wl-thread-entity-get-children dst-parent-entity))
1165                 (wl-append update-msgs
1166                            (wl-thread-get-children-msgs
1167                             (car (last children)) t)))
1168             (wl-thread-entity-set-children
1169              dst-parent-entity
1170              (append children (list number)))
1171             (wl-thread-entity-set-linked entity t))
1172         ;; insert as top
1173         (wl-append wl-thread-entity-list (list number))
1174         (wl-thread-entity-set-linked entity nil))
1175
1176       ;; update my thread
1177       (wl-append update-msgs (wl-thread-get-children-msgs number t))
1178       (setq update-msgs (elmo-uniq-list update-msgs))
1179       (wl-thread-entity-set-parent entity dst-parent)
1180       ;; update thread on buffer
1181       (wl-thread-make-number-list)
1182       (wl-thread-update-line-msgs update-msgs t))))
1183
1184 (require 'product)
1185 (product-provide (provide 'wl-thread) (require 'wl-version))
1186
1187 ;;; wl-thread.el ends here