wl/wl-thread.el

   1 ;;; wl-thread.el --- Thread display modules for Wanderlust.
   2
   3 ;; Copyright (C) 1998,1999,2000 Yuuichi Teranishi <teranisi@gohome.org>
   4 ;; Copyright (C) 1998,1999,2000 Masahiro MURATA  <muse@ba2.so-net.ne.jp>
   5
   6 ;; Author: Yuuichi Teranishi <teranisi@gohome.org>
   7 ;;      Masahiro MURATA  <muse@ba2.so-net.ne.jp>
   8 ;; Keywords: mail, net news
   9
  10 ;; This file is part of Wanderlust (Yet Another Message Interface on Emacsen).
  11
  12 ;; This program is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16 ;;
  17 ;; This program is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21 ;;
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 ;; Boston, MA 02111-1307, USA.
  26 ;;
  27
  28 ;;; Commentary:
  29 ;;
  30
  31 ;;; Code:
  32 ;;
  33
  34 (require 'wl-summary)
  35 (require 'wl-highlight)
  36 (eval-when-compile (require 'cl))
  37
  38 ;; buffer local variables.
  39 ;;(defvar wl-thread-top-entity '(nil t nil nil)) ; top entity
  40 (defvar wl-thread-tops nil)             ; top number list (number)
  41 (defvar wl-thread-entities nil)
  42 (defvar wl-thread-entity-list nil)      ; entity list
  43 (defvar wl-thread-entity-hashtb nil)    ; obarray
  44 (defvar wl-thread-indent-regexp nil)
  45
  46 (make-variable-buffer-local 'wl-thread-entity-hashtb)
  47 (make-variable-buffer-local 'wl-thread-entities)     ; ".wl-thread-entity"
  48 (make-variable-buffer-local 'wl-thread-entity-list)  ; ".wl-thread-entity-list"
  49 (make-variable-buffer-local 'wl-thread-entity-cur)
  50 (make-variable-buffer-local 'wl-thread-indent-regexp)
  51
  52 ;;; global flag
  53 (defvar wl-thread-insert-force-opened nil)
  54
  55 ;;;;;; each entity is (number opened-or-not children parent) ;;;;;;;
  56
  57 (defun wl-thread-resume-entity (fld)
  58   (let (entities top-list)
  59     (setq entities (wl-summary-load-file-object
  60                     (expand-file-name wl-thread-entity-file
  61                                       (elmo-folder-msgdb-path fld))))
  62     (setq top-list
  63           (wl-summary-load-file-object
  64            (expand-file-name wl-thread-entity-list-file
  65                              (elmo-folder-msgdb-path fld))))
  66     (message "Resuming thread structure...")
  67     ;; set obarray value.
  68     (setq wl-thread-entity-hashtb (elmo-make-hash (* (length entities) 2)))
  69     ;; set buffer local variables.
  70     (setq wl-thread-entities entities)
  71     (setq wl-thread-entity-list top-list)
  72     (while entities
  73       (elmo-set-hash-val (format "#%d" (car (car entities))) (car entities)
  74                          wl-thread-entity-hashtb)
  75       (setq entities (cdr entities)))
  76     (wl-thread-make-number-list)
  77     (message "Resuming thread structure...done")))
  78
  79 (defun wl-thread-make-number-list ()
  80   "Make `wl-summary-buffer-number-list', a list of message numbers."
  81   (let* ((node (wl-thread-get-entity (car wl-thread-entity-list)))
  82          (children (wl-thread-entity-get-children node))
  83          parent sibling)
  84     (setq wl-summary-buffer-number-list (list (car wl-thread-entity-list)))
  85     (while children
  86       (wl-thread-entity-make-number-list-from-children
  87        (wl-thread-get-entity (car children)))
  88       (setq children (cdr children)))
  89     (while node
  90       (setq parent (wl-thread-entity-get-parent-entity node)
  91             sibling (wl-thread-entity-get-younger-brothers
  92                      node parent))
  93       (while sibling
  94         (wl-thread-entity-make-number-list-from-children
  95          (wl-thread-get-entity (car sibling)))
  96         (setq sibling (cdr sibling)))
  97       (setq node parent))
  98     (setq wl-summary-buffer-number-list (nreverse
  99                                          wl-summary-buffer-number-list))))
 100
 101 (defun wl-thread-entity-make-number-list-from-children (entity)
 102   (let ((msgs (list (car entity)))
 103         msgs-stack children)
 104     (while msgs
 105       (setq wl-summary-buffer-number-list (cons (car entity)
 106                                         wl-summary-buffer-number-list))
 107       (setq msgs (cdr msgs))
 108       (setq children (wl-thread-entity-get-children entity))
 109       (if children
 110           (progn
 111             (wl-push msgs msgs-stack)
 112             (setq msgs children))
 113         (unless msgs
 114           (while (and (null msgs) msgs-stack)
 115             (setq msgs (wl-pop msgs-stack)))))
 116       (setq entity (wl-thread-get-entity (car msgs))))))
 117
 118 (defun wl-thread-save-entity (dir)
 119   (wl-thread-save-entities dir)
 120   (wl-thread-save-top-list dir))
 121
 122 (defun wl-thread-save-top-list (dir)
 123   (let ((top-file (expand-file-name wl-thread-entity-list-file dir))
 124         (entity wl-thread-entity-list)
 125         (tmp-buffer (get-buffer-create " *wl-thread-save-top-list*")))
 126     (save-excursion
 127       (set-buffer tmp-buffer)
 128       (erase-buffer)
 129       (when (file-writable-p top-file)
 130         (prin1 entity tmp-buffer)
 131         (princ "\n" tmp-buffer)
 132         (write-region (point-min) (point-max) top-file nil 'no-msg)
 133         (kill-buffer tmp-buffer)))))
 134
 135 (defun wl-thread-save-entities (dir)
 136   (let ((top-file (expand-file-name wl-thread-entity-file dir))
 137         (entities wl-thread-entities)
 138         (tmp-buffer (get-buffer-create " *wl-thread-save-entities*")))
 139     (save-excursion
 140       (set-buffer tmp-buffer)
 141       (erase-buffer)
 142       (when (file-writable-p top-file)
 143         (prin1 entities tmp-buffer)
 144         (princ "\n" tmp-buffer)
 145         (write-region (point-min) (point-max) top-file nil 'no-msg)
 146         (kill-buffer tmp-buffer)))))
 147
 148 (defsubst wl-thread-entity-get-number (entity)
 149   (nth 0 entity))
 150 (defsubst wl-thread-entity-get-opened (entity)
 151   (nth 1 entity))
 152 (defsubst wl-thread-entity-get-children (entity)
 153   (nth 2 entity))
 154 (defsubst wl-thread-entity-get-parent (entity)
 155   (nth 3 entity))
 156 (defsubst wl-thread-entity-get-linked (entity)
 157   (nth 4 entity))
 158
 159 (defsubst wl-thread-create-entity (num parent &optional opened linked)
 160   (list num (or opened wl-thread-insert-opened) nil parent linked))
 161
 162 (defsubst wl-thread-get-entity (num)
 163   (and num
 164        (elmo-get-hash-val (format "#%d" num) wl-thread-entity-hashtb)))
 165
 166 (defsubst wl-thread-entity-set-parent (entity parent)
 167   (setcar (cdddr entity) parent)
 168   entity)
 169
 170 (defsubst wl-thread-entity-set-children (entity children)
 171   (setcar (cddr entity) children))
 172
 173 (defsubst wl-thread-entity-set-linked (entity linked)
 174   (if (cddddr entity)
 175       (setcar (cddddr entity) linked)
 176     (nconc entity (list linked)))
 177   entity)
 178
 179 (defsubst wl-thread-reparent-children (children parent)
 180   (while children
 181     (wl-thread-entity-set-parent
 182      (wl-thread-get-entity (car children)) parent)
 183     (wl-thread-entity-set-linked
 184      (wl-thread-get-entity (car children)) t)
 185     (setq children (cdr children))))
 186
 187 (defsubst wl-thread-entity-insert-as-top (entity)
 188   (when (and entity
 189              (car entity))
 190     (wl-append wl-thread-entity-list (list (car entity)))
 191     (setq wl-thread-entities (cons entity wl-thread-entities))
 192     (setq wl-summary-buffer-number-list
 193           (nconc wl-summary-buffer-number-list (list (car entity))))
 194     (elmo-set-hash-val (format "#%d" (car entity)) entity
 195                        wl-thread-entity-hashtb)))
 196
 197 (defsubst wl-thread-entity-insert-as-children (to entity)
 198   (let ((children (wl-thread-entity-get-children to))
 199         curp curc)
 200     (setq curp to)
 201     (elmo-list-insert wl-summary-buffer-number-list
 202                       (wl-thread-entity-get-number entity)
 203                       (progn
 204                         (while (setq curc
 205                                      (wl-thread-entity-get-children curp))
 206                           (setq curp (wl-thread-get-entity
 207                                       (nth (- (length curc) 1)
 208                                            curc))))
 209                         (wl-thread-entity-get-number curp)))
 210     (setcar (cddr to) (wl-append children
 211                                  (list (car entity))))
 212     (setq wl-thread-entities (cons entity wl-thread-entities))
 213     (elmo-set-hash-val (format "#%d" (car entity)) entity
 214                        wl-thread-entity-hashtb)))
 215
 216 (defsubst wl-thread-entity-set-opened (entity opened)
 217   (setcar (cdr entity) opened))
 218
 219 (defsubst wl-thread-entity-get-children-num (entity)
 220   (let (children
 221         ret-val msgs-stack
 222         (msgs (list (car entity))))
 223    (while msgs
 224      (setq msgs (cdr msgs))
 225      (setq children (wl-thread-entity-get-children entity))
 226      (if (null children)
 227          (while (and (null msgs) msgs-stack)
 228            (setq msgs (wl-pop msgs-stack)))
 229        (setq ret-val (+ (or ret-val 0) (length children)))
 230        (wl-push msgs msgs-stack)
 231        (setq msgs children))
 232      (setq entity (wl-thread-get-entity (car msgs))))
 233    ret-val))
 234
 235 (defsubst wl-thread-entity-get-descendant (entity)
 236   (let (children
 237         ret-val msgs-stack
 238         (msgs (list (car entity))))
 239    (while msgs
 240      (setq msgs (cdr msgs))
 241      (setq children (wl-thread-entity-get-children entity))
 242      (if (null children)
 243          (while (and (null msgs) msgs-stack)
 244            (setq msgs (wl-pop msgs-stack)))
 245        (setq ret-val (append ret-val (copy-sequence children)))
 246        (wl-push msgs msgs-stack)
 247        (setq msgs children))
 248      (setq entity (wl-thread-get-entity (car msgs))))
 249    ret-val))
 250
 251 (defsubst wl-thread-entity-get-parent-entity (entity)
 252   (wl-thread-get-entity (wl-thread-entity-get-parent entity)))
 253
 254 (defun wl-thread-entity-get-top-entity (entity)
 255   (let ((cur-entity entity)
 256         p-num)
 257     (while (setq p-num (wl-thread-entity-get-parent cur-entity))
 258       (setq cur-entity (wl-thread-get-entity p-num)))
 259     cur-entity))
 260
 261 (defun wl-thread-entity-parent-invisible-p (entity)
 262   "If parent of ENTITY is invisible, the top invisible ancestor entity of
 263 ENTITY is returned."
 264   (let ((cur-entity entity)
 265         ret-val)
 266     (catch 'done
 267       (while (setq cur-entity (wl-thread-entity-get-parent-entity
 268                                cur-entity))
 269         (if (null (wl-thread-entity-get-number cur-entity))
 270             ;; top!!
 271             (progn
 272               ;;(setq ret-val nil)
 273               (throw 'done nil))
 274           (when (not (wl-thread-entity-get-opened cur-entity))
 275             ;; not opened!!
 276             (setq ret-val cur-entity)))))
 277     ;; top of closed entity in the path.
 278     ret-val))
 279
 280 (defun wl-thread-entity-get-nearly-older-brother (entity &optional parent)
 281   (let ((brothers (wl-thread-entity-get-older-brothers entity parent)))
 282     (when brothers
 283       (car (last brothers)))))
 284
 285 (defun wl-thread-entity-get-older-brothers (entity &optional parent)
 286   (let* ((parent (or parent
 287                      (wl-thread-entity-get-parent-entity entity)))
 288          (brothers (wl-thread-entity-get-children parent))
 289          ret-val)
 290     (if parent
 291         brothers
 292       (setq brothers wl-thread-entity-list))
 293     (while (and brothers
 294                 (not (eq (wl-thread-entity-get-number entity)
 295                          (car brothers))))
 296       (wl-append ret-val (list (car brothers)))
 297       (setq brothers (cdr brothers)))
 298     ret-val))
 299
 300 (defun wl-thread-entity-get-younger-brothers (entity &optional parent)
 301   (let* ((parent (or parent
 302                      (wl-thread-entity-get-parent-entity entity)))
 303          (brothers (wl-thread-entity-get-children parent)))
 304     (if parent
 305         (cdr (memq (wl-thread-entity-get-number entity)
 306                    brothers))
 307       ;; top!!
 308       (cdr (memq (car entity) wl-thread-entity-list)))))
 309
 310 (defun wl-thread-jump-to-msg (&optional number)
 311   (interactive)
 312   (let ((num (or number
 313                  (string-to-int
 314                   (read-from-minibuffer "Jump to Message(No.): ")))))
 315     (wl-thread-entity-force-open (wl-thread-get-entity num))
 316     (wl-summary-jump-to-msg num)))
 317
 318 (defun wl-thread-close-all ()
 319   "Close all top threads."
 320   (interactive)
 321   (message "Closing all threads...")
 322   (save-excursion
 323     (let ((entities wl-thread-entity-list)
 324           (cur 0)
 325           (len (length wl-thread-entity-list)))
 326       (while entities
 327         (when (and (wl-thread-entity-get-opened (wl-thread-get-entity
 328                                                  (car entities)))
 329                    (wl-thread-entity-get-children (wl-thread-get-entity
 330                                                    (car entities))))
 331           (wl-summary-jump-to-msg (car entities))
 332           (wl-thread-open-close))
 333         (when (> len elmo-display-progress-threshold)
 334           (setq cur (1+ cur))
 335           (if (or (zerop (% cur 5)) (= cur len))
 336               (elmo-display-progress
 337                'wl-thread-close-all "Closing all threads..."
 338                (/ (* cur 100) len))))
 339         (setq entities (cdr entities)))))
 340   (message "Closing all threads...done"))
 341
 342 (defun wl-thread-open-all ()
 343   "Open all threads."
 344   (interactive)
 345   (message "Opening all threads...")
 346   (save-excursion
 347     (goto-char (point-min))
 348     (let ((len (count-lines (point-min) (point-max)))
 349           (cur 0)
 350           entity)
 351       (while (not (eobp))
 352         (if (wl-thread-entity-get-opened
 353              (setq entity (wl-thread-get-entity
 354                            (wl-summary-message-number))))
 355             (forward-line 1)
 356           (wl-thread-force-open)
 357           (wl-thread-goto-bottom-of-sub-thread))
 358         (when (> len elmo-display-progress-threshold)
 359           (setq cur (1+ cur))
 360           (elmo-display-progress
 361            'wl-thread-open-all "Opening all threads..."
 362            (/ (* cur 100) len)))))
 363     ;; Make sure to be 100%.
 364     (elmo-display-progress
 365      'wl-thread-open-all "Opening all threads..."
 366      100))
 367   (message "Opening all threads...done"))
 368
 369 (defun wl-thread-open-all-unread ()
 370   (interactive)
 371   (dolist (number (elmo-folder-list-messages-mark-match
 372                    wl-summary-buffer-elmo-folder
 373                    (wl-regexp-opt (list wl-summary-unread-uncached-mark
 374                                         wl-summary-unread-cached-mark
 375                                         wl-summary-new-mark
 376                                         wl-summary-important-mark))))
 377     (wl-thread-entity-force-open (wl-thread-get-entity number))))
 378
 379 (defsubst wl-thread-maybe-get-children-num (msg)
 380   (let ((entity (wl-thread-get-entity msg)))
 381     (if (not (wl-thread-entity-get-opened entity))
 382         (wl-thread-entity-get-children-num entity))))
 383
 384 (defsubst wl-thread-update-line-on-buffer-sub (entity msg &optional parent-msg)
 385   (let* ((entity (or entity (wl-thread-get-entity msg)))
 386          (parent-msg (or parent-msg (wl-thread-entity-get-parent entity)))
 387          (overview (elmo-msgdb-get-overview (wl-summary-buffer-msgdb)))
 388          (buffer-read-only nil)
 389          (inhibit-read-only t)
 390          overview-entity temp-mark summary-line invisible-top dest-pair)
 391     (if (wl-thread-delete-line-from-buffer msg)
 392         (progn
 393           (cond
 394            ((memq msg wl-summary-buffer-delete-list)
 395             (setq temp-mark "D"))
 396            ((memq msg wl-summary-buffer-target-mark-list)
 397             (setq temp-mark "*"))
 398            ((setq dest-pair (assq msg wl-summary-buffer-refile-list))
 399             (setq temp-mark "o"))
 400            ((setq dest-pair (assq msg wl-summary-buffer-copy-list))
 401             (setq temp-mark "O"))
 402            (t (setq temp-mark (wl-summary-get-score-mark msg))))
 403           (when (setq overview-entity
 404                       (elmo-msgdb-overview-get-entity
 405                        msg (wl-summary-buffer-msgdb)))
 406             (wl-summary-insert-line
 407              (wl-summary-create-line
 408               overview-entity
 409               (elmo-msgdb-overview-get-entity
 410                parent-msg (wl-summary-buffer-msgdb))
 411               temp-mark
 412               (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg)
 413               (if wl-thread-insert-force-opened
 414                   nil
 415                 (wl-thread-maybe-get-children-num msg))
 416               (wl-thread-make-indent-string entity)
 417               (wl-thread-entity-get-linked entity)))
 418             (if dest-pair
 419                 (wl-summary-print-destination (car dest-pair)
 420                                               (cdr dest-pair)))))
 421       ;; insert thread (moving thread)
 422       (if (not (setq invisible-top
 423                      (wl-thread-entity-parent-invisible-p entity)))
 424           (wl-summary-update-thread
 425            (elmo-msgdb-overview-get-entity msg (wl-summary-buffer-msgdb))
 426            entity
 427            (and parent-msg
 428                 (elmo-msgdb-overview-get-entity
 429                  parent-msg (wl-summary-buffer-msgdb))))
 430         ;; currently invisible.. update closed line.
 431         (wl-thread-update-children-number invisible-top)))))
 432
 433 (defun wl-thread-update-line-on-buffer (&optional msg parent-msg updates)
 434   (interactive)
 435   (let ((msgs (list (or msg (wl-summary-message-number))))
 436         entity children msgs-stack)
 437    (while msgs
 438     (setq msg (wl-pop msgs))
 439     (setq updates (and updates (delete msg updates)))
 440     (setq entity (wl-thread-get-entity msg))
 441     (wl-thread-update-line-on-buffer-sub entity msg parent-msg)
 442     ;;
 443     (setq children (wl-thread-entity-get-children entity))
 444     (if children
 445         ;; update children
 446         (when (wl-thread-entity-get-opened entity)
 447           (wl-push msgs msgs-stack)
 448           (setq parent-msg msg
 449                 msgs children))
 450       (unless msgs
 451         (while (and (null msgs) msgs-stack)
 452           (setq msgs (wl-pop msgs-stack)))
 453         (when msgs
 454           (setq parent-msg
 455                 (wl-thread-entity-get-number
 456                  (wl-thread-entity-get-parent-entity
 457                   (wl-thread-get-entity (car msgs)))))))))
 458    updates))
 459
 460 (defun wl-thread-update-line-msgs (msgs &optional no-msg)
 461   (wl-delete-all-overlays)
 462   (let ((i 0)
 463         (updates msgs)
 464         len)
 465 ;;; (while msgs
 466 ;;;   (setq updates
 467 ;;;         (append updates
 468 ;;;                 (wl-thread-get-children-msgs (car msgs))))
 469 ;;;   (setq msgs (cdr msgs)))
 470 ;;; (setq updates (elmo-uniq-list updates))
 471     (setq len (length updates))
 472     (while updates
 473       (wl-thread-update-line-on-buffer-sub nil (car updates))
 474       (setq updates (cdr updates))
 475       (when (and (not no-msg)
 476                  (> len elmo-display-progress-threshold))
 477         (setq i (1+ i))
 478         (if (or (zerop (% i 5)) (= i len))
 479             (elmo-display-progress
 480              'wl-thread-update-line-msgs "Updating deleted thread..."
 481              (/ (* i 100) len)))))))
 482
 483 (defun wl-thread-delete-line-from-buffer (msg)
 484   "Simply delete msg line."
 485   (let (beg)
 486     (if (wl-summary-jump-to-msg msg)
 487         (progn
 488           (setq beg (point))
 489           (forward-line 1)
 490           (delete-region beg (point))
 491           t)
 492       nil)))
 493
 494 (defun wl-thread-cleanup-symbols (msgs)
 495   (let (entity)
 496     (while msgs
 497       (when (setq entity (wl-thread-get-entity (car msgs)))
 498         ;; delete entity.
 499         (setq wl-thread-entities (delq entity wl-thread-entities))
 500         ;; free symbol.
 501         (elmo-clear-hash-val (format "#%d" (car msgs))
 502                              wl-thread-entity-hashtb))
 503       (setq msgs (cdr msgs)))))
 504
 505 (defun wl-thread-get-exist-children (msg &optional include-self)
 506   (let ((msgs (list msg))
 507         msgs-stack children
 508         entity ret-val)
 509     (while msgs
 510       (setq children (wl-thread-entity-get-children
 511                       (setq entity (wl-thread-get-entity (car msgs)))))
 512       (when (elmo-msgdb-overview-get-entity (car msgs)
 513                                             (wl-summary-buffer-msgdb))
 514         (wl-append ret-val (list (car msgs)))
 515         (setq children nil))
 516       (setq msgs (cdr msgs))
 517       (if (null children)
 518           (while (and (null msgs) msgs-stack)
 519             (setq msgs (wl-pop msgs-stack)))
 520         (wl-push msgs msgs-stack)
 521         (setq msgs children)))
 522     (unless include-self (setq ret-val (delq msg ret-val)))
 523     ret-val))
 524
 525 (defun wl-thread-delete-message (msg &optional deep update)
 526   "Delete MSG from entity and buffer."
 527   (save-excursion
 528     (let* ((entity (wl-thread-get-entity msg))
 529            children older-brothers younger-brothers top-child ;;grandchildren
 530            top-entity parent update-msgs beg invisible-top)
 531       (when entity
 532         (setq parent (wl-thread-entity-get-parent-entity entity))
 533         (if parent
 534             (progn
 535 ;;; has parent.
 536 ;;;           (setq brothers (wl-thread-entity-get-children parent))
 537               (setq older-brothers (wl-thread-entity-get-older-brothers
 538                                     entity parent))
 539               (setq younger-brothers (wl-thread-entity-get-younger-brothers
 540                                       entity parent))
 541               ;;
 542               (unless deep
 543                 (setq children (wl-thread-entity-get-children entity))
 544                 (wl-thread-reparent-children
 545                  children (wl-thread-entity-get-number parent))
 546                 (setq update-msgs
 547                       (apply (function nconc)
 548                              update-msgs
 549                              (mapcar
 550                               (function
 551                                (lambda (message)
 552                                  (wl-thread-get-children-msgs message t)))
 553                               children))))
 554               (wl-thread-entity-set-children
 555                parent (append older-brothers children younger-brothers))
 556               ;; If chidren and younger-brothers not exists,
 557               ;; update nearly older brother.
 558               (when (and older-brothers
 559                          (not younger-brothers)
 560                          (not children))
 561                 (wl-append
 562                  update-msgs
 563                  (wl-thread-get-children-msgs (car (last older-brothers))))))
 564
 565           ;; top...oldest child becomes top.
 566           (unless deep
 567             (setq children (wl-thread-entity-get-children entity))
 568             (when children
 569               (setq top-child (car children)
 570                     children (cdr children))
 571               (setq top-entity (wl-thread-get-entity top-child))
 572               (wl-thread-entity-set-parent top-entity nil)
 573               (wl-thread-entity-set-linked top-entity nil)
 574               (wl-append update-msgs
 575                          (wl-thread-get-children-msgs top-child t)))
 576             (when children
 577               (wl-thread-entity-set-children
 578                top-entity
 579                (append
 580                 (wl-thread-entity-get-children top-entity)
 581                 children))
 582               (wl-thread-reparent-children children top-child)
 583               (wl-append update-msgs children)))
 584           ;; delete myself from top list.
 585           (setq wl-summary-buffer-number-list
 586                 (delq msg wl-summary-buffer-number-list))
 587           (setq older-brothers (wl-thread-entity-get-older-brothers
 588                                 entity nil))
 589           (setq younger-brothers (wl-thread-entity-get-younger-brothers
 590                                   entity nil))
 591           (setq wl-thread-entity-list
 592                 (append (append older-brothers
 593                                 (and top-child (list top-child)))
 594                         younger-brothers))))
 595
 596       (if deep
 597           ;; delete thread on buffer
 598           (when (wl-summary-jump-to-msg msg)
 599             (setq beg (point))
 600             (wl-thread-goto-bottom-of-sub-thread)
 601             (delete-region beg (point)))
 602         ;; delete myself from buffer.
 603         (unless (wl-thread-delete-line-from-buffer msg)
 604           ;; jump to suitable point.
 605           ;; just upon the oldest younger-brother of my top.
 606           (setq invisible-top
 607                 (car (wl-thread-entity-parent-invisible-p entity)))
 608           (if invisible-top
 609               (progn
 610                 (wl-append update-msgs (list invisible-top))
 611                 (wl-summary-jump-to-msg invisible-top))
 612             (goto-char (point-max))))
 613
 614         ;; insert children if thread is closed or delete top.
 615         (when (or top-child
 616                   (not (wl-thread-entity-get-opened entity)))
 617           (let* (next-top insert-msgs ent e grandchildren)
 618             (if top-child
 619                 (progn
 620                   (setq insert-msgs (wl-thread-get-exist-children
 621                                      top-child 'include-self))
 622                   (setq next-top (car insert-msgs))
 623                   (setq ent (wl-thread-get-entity next-top))
 624                   (when (and
 625                          (wl-thread-entity-get-opened entity) ;; open
 626                          (not (wl-thread-entity-get-opened ent)) ;; close
 627                          (setq grandchildren
 628                                (wl-thread-entity-get-children ent))
 629                          (wl-summary-jump-to-msg next-top))
 630                     (forward-line 1)
 631                     (setq insert-msgs (append (cdr insert-msgs) grandchildren)))
 632                   (when top-entity (wl-thread-entity-set-opened top-entity t))
 633                   (when ent (wl-thread-entity-set-opened ent t)))
 634               (when (not invisible-top)
 635                 (setq insert-msgs (wl-thread-get-exist-children msg))
 636                 ;; First msg always opened, because first msg maybe becomes top.
 637                 (if (setq ent (wl-thread-get-entity (car insert-msgs)))
 638                     (wl-thread-entity-set-opened ent t))))
 639             ;; insert children
 640             (while insert-msgs
 641               ;; if no exists in summary, insert entity.
 642               (when (and (car insert-msgs)
 643                          (not (wl-summary-jump-to-msg (car insert-msgs))))
 644                 (setq ent (wl-thread-get-entity (car insert-msgs)))
 645                 (wl-thread-insert-entity 0 ; no mean now...
 646                                          ent entity nil))
 647               (setq insert-msgs (cdr insert-msgs))))))
 648       (if update
 649           ;; modify buffer.
 650           (while update-msgs
 651             (wl-thread-update-line-on-buffer-sub nil (pop update-msgs)))
 652         ;; don't update buffer
 653         update-msgs)))) ; return value
 654
 655 (defun wl-thread-insert-message (overview-entity
 656                                  msg parent-msg &optional update linked)
 657   "Insert MSG to the entity.
 658 When optional argument UPDATE is non-nil,
 659 Message is inserted to the summary buffer."
 660   (let ((parent (wl-thread-get-entity parent-msg))
 661         child-entity invisible-top)
 662 ;;; Update the thread view...not implemented yet.
 663 ;;;  (when force-insert
 664 ;;;    (if parent
 665 ;;;       (wl-thread-entity-force-open parent))
 666     (if parent
 667         ;; insert as children.
 668         (wl-thread-entity-insert-as-children
 669          parent
 670          (setq child-entity (wl-thread-create-entity
 671                              msg (nth 0 parent) nil linked)))
 672       ;; insert as top message.
 673       (wl-thread-entity-insert-as-top
 674        (wl-thread-create-entity msg nil)))
 675     (if update
 676         (if (not (setq invisible-top
 677                        (wl-thread-entity-parent-invisible-p child-entity)))
 678             ;; visible.
 679             (progn
 680               (wl-summary-update-thread
 681                overview-entity
 682                child-entity
 683                (elmo-msgdb-overview-get-entity
 684                 parent-msg (wl-summary-buffer-msgdb)))
 685               (when parent
 686                 ;; use thread structure.
 687                 (wl-thread-entity-get-nearly-older-brother
 688                  child-entity parent))) ; return value
 689 ;;;             (wl-thread-entity-get-number
 690 ;;;              (wl-thread-entity-get-top-entity parent)))) ; return value;
 691 ;;;           (setq beg (point))
 692 ;;;           (wl-thread-goto-bottom-of-sub-thread)
 693 ;;;           (wl-thread-update-indent-string-region beg (point)))
 694           ;; currently invisible.. update closed line.
 695           (wl-thread-update-children-number invisible-top)
 696           nil))))
 697
 698 (defun wl-thread-get-parent-list (msgs)
 699   (let* ((msgs2 msgs)
 700          myself)
 701     (while msgs2
 702       (setq myself (car msgs2)
 703             msgs2 (cdr msgs2))
 704       (while (not (eq myself (car msgs2)))
 705         (if (wl-thread-descendant-p myself (car msgs2))
 706             (setq msgs (delq (car msgs2) msgs)))
 707         (setq msgs2 (or (cdr msgs2) msgs)))
 708       (setq msgs2 (cdr msgs2)))
 709     msgs))
 710
 711 (defun wl-thread-update-indent-string-thread (top-list)
 712   (let ((top-list (wl-thread-get-parent-list top-list))
 713         beg)
 714     (while top-list
 715       (when (car top-list)
 716         (wl-summary-jump-to-msg (car top-list))
 717         (setq beg (point))
 718         (wl-thread-goto-bottom-of-sub-thread)
 719         (wl-thread-update-indent-string-region beg (point)))
 720       (setq top-list (cdr top-list)))))
 721
 722 (defun wl-thread-update-children-number (entity)
 723   "Update the children number."
 724   (wl-thread-update-line-on-buffer (wl-thread-entity-get-number entity)))
 725
 726 ;;
 727 ;; Thread oriented commands.
 728 ;;
 729 (defun wl-thread-call-region-func (func &optional arg)
 730   (save-excursion
 731     (if arg
 732         (wl-summary-goto-top-of-current-thread)
 733       (beginning-of-line))
 734     (let ((beg (point)))
 735       (wl-thread-goto-bottom-of-sub-thread)
 736       (funcall func beg (point)))))
 737
 738 (defun wl-thread-prefetch (&optional arg)
 739   (interactive "P")
 740   (wl-thread-call-region-func 'wl-summary-prefetch-region arg))
 741
 742 (defun wl-thread-msg-mark-as-important (msg)
 743   "Set mark as important for invisible MSG. Modeline is not changed."
 744   (let ((msgdb (wl-summary-buffer-msgdb))
 745         cur-mark)
 746     (setq cur-mark (elmo-msgdb-get-mark msgdb msg))
 747     (elmo-msgdb-set-mark msgdb
 748                          msg
 749                          (if (string= cur-mark wl-summary-important-mark)
 750                              nil
 751                            wl-summary-important-mark))
 752     (wl-summary-set-mark-modified)))
 753
 754 (defun wl-thread-mark-as-read (&optional arg)
 755   (interactive "P")
 756   (wl-thread-call-region-func 'wl-summary-mark-as-read-region arg))
 757
 758 (defun wl-thread-mark-as-unread (&optional arg)
 759   (interactive "P")
 760   (wl-thread-call-region-func 'wl-summary-mark-as-unread-region arg))
 761
 762 (defun wl-thread-mark-as-important (&optional arg)
 763   (interactive "P")
 764   (wl-thread-call-region-func 'wl-summary-mark-as-important-region arg))
 765
 766 (defun wl-thread-copy (&optional arg)
 767   (interactive "P")
 768   (wl-thread-call-region-func 'wl-summary-copy-region arg))
 769
 770 (defun wl-thread-refile (&optional arg)
 771   (interactive "P")
 772   (condition-case err
 773       (progn
 774         (wl-thread-call-region-func 'wl-summary-refile-region arg)
 775         (if arg
 776             (wl-summary-goto-top-of-current-thread))
 777         (wl-thread-goto-bottom-of-sub-thread))
 778     (error
 779      (elmo-display-error err t)
 780      nil)))
 781
 782 (defun wl-thread-delete (&optional arg)
 783   (interactive "P")
 784   (wl-thread-call-region-func 'wl-summary-delete-region arg)
 785   (if arg
 786       (wl-summary-goto-top-of-current-thread))
 787   (if (not wl-summary-move-direction-downward)
 788       (wl-summary-prev)
 789     (wl-thread-goto-bottom-of-sub-thread)
 790     (if wl-summary-buffer-disp-msg
 791         (wl-summary-redisplay))))
 792
 793 (defun wl-thread-target-mark (&optional arg)
 794   (interactive "P")
 795   (wl-thread-call-region-func 'wl-summary-target-mark-region arg))
 796
 797 (defun wl-thread-unmark (&optional arg)
 798   (interactive "P")
 799   (wl-thread-call-region-func 'wl-summary-unmark-region arg))
 800
 801 (defun wl-thread-exec (&optional arg)
 802   (interactive "P")
 803   (wl-thread-call-region-func 'wl-summary-exec-region arg))
 804
 805 (defun wl-thread-save (&optional arg)
 806   (interactive "P")
 807   (wl-thread-call-region-func 'wl-summary-save-region arg))
 808
 809 (defun wl-thread-force-open (&optional msg-num)
 810   "force open current folder"
 811   (if msg-num
 812       (wl-summary-jump-to-msg msg-num))
 813   (let ((wl-thread-insert-force-opened t))
 814     (wl-thread-open-close)))
 815
 816 (defun wl-thread-entity-force-open (entity)
 817   (let ((wl-thread-insert-force-opened t)
 818         notopen)
 819     (if (null (wl-thread-entity-get-parent entity))
 820         ;; top!!
 821         (if (and (not (wl-thread-entity-get-opened entity))
 822                  (wl-thread-entity-get-children entity))
 823             (wl-thread-force-open (wl-thread-entity-get-number entity)))
 824       (if (setq notopen (wl-thread-entity-parent-invisible-p entity))
 825           (wl-thread-force-open (wl-thread-entity-get-number notopen))))))
 826
 827 (defun wl-thread-insert-top ()
 828   (let ((elist wl-thread-entity-list)
 829         (len (length wl-thread-entity-list))
 830         (cur 0))
 831     (wl-delete-all-overlays)
 832     (while elist
 833       (wl-thread-insert-entity
 834        0
 835        (wl-thread-get-entity (car elist))
 836        nil
 837        len)
 838       (setq elist (cdr elist))
 839       (when (> len elmo-display-progress-threshold)
 840         (setq cur (1+ cur))
 841         (if (or (zerop (% cur 2)) (= cur len))
 842             (elmo-display-progress
 843              'wl-thread-insert-top "Inserting thread..."
 844              (/ (* cur 100) len)))))))
 845
 846 (defsubst wl-thread-insert-entity-sub (indent entity parent-entity all)
 847   (let (msg-num
 848         overview-entity
 849         temp-mark
 850         summary-line)
 851     (when (setq msg-num (wl-thread-entity-get-number entity))
 852       (unless all ; all...means no temp-mark.
 853         (cond ((memq msg-num wl-summary-buffer-delete-list)
 854                (setq temp-mark "D"))
 855               ((memq msg-num wl-summary-buffer-target-mark-list)
 856                (setq temp-mark "*"))
 857               ((assq msg-num wl-summary-buffer-refile-list)
 858                (setq temp-mark "o"))
 859               ((assq msg-num wl-summary-buffer-copy-list)
 860                (setq temp-mark "O"))))
 861       (unless temp-mark
 862         (setq temp-mark (wl-summary-get-score-mark msg-num)))
 863       (setq overview-entity
 864             (elmo-msgdb-overview-get-entity
 865              (nth 0 entity) (wl-summary-buffer-msgdb)))
 866 ;;;   (wl-delete-all-overlays)
 867       (when overview-entity
 868         (wl-summary-insert-line
 869          (wl-summary-create-line
 870           overview-entity
 871           (elmo-msgdb-overview-get-entity
 872            (nth 0 parent-entity) (wl-summary-buffer-msgdb))
 873           temp-mark
 874           (elmo-msgdb-get-mark (wl-summary-buffer-msgdb) msg-num)
 875           (if wl-thread-insert-force-opened
 876               nil
 877             (wl-thread-maybe-get-children-num msg-num))
 878           (wl-thread-make-indent-string entity)
 879           (wl-thread-entity-get-linked entity)))))))
 880
 881 (defun wl-thread-insert-entity (indent entity parent-entity all)
 882   "Insert thread entity in current buffer."
 883   (let ((msgs (list (car entity)))
 884         children msgs-stack)
 885     (while msgs
 886       (wl-thread-insert-entity-sub indent entity parent-entity all)
 887       (setq msgs (cdr msgs))
 888       (setq children (nth 2 entity))
 889       (if children
 890           ;; insert children
 891           (when (or wl-thread-insert-force-opened
 892                     (wl-thread-entity-get-opened entity))
 893             (wl-thread-entity-set-opened entity t)
 894             (wl-push msgs msgs-stack)
 895             (setq msgs children
 896                   indent (1+ indent)
 897                   parent-entity entity)))
 898       (unless msgs
 899         (while (and (null msgs) msgs-stack)
 900           (setq msgs (wl-pop msgs-stack))
 901           (setq indent (1- indent)))
 902         (when msgs
 903           (setq entity (wl-thread-get-entity (car msgs)))
 904           (setq parent-entity (wl-thread-entity-get-parent-entity entity))))
 905       (setq entity (wl-thread-get-entity (car msgs))))))
 906
 907 (defun wl-thread-descendant-p (mynumber number)
 908   (let ((cur (wl-thread-get-entity number))
 909         num)
 910     (catch 'done
 911       (while cur
 912         (setq cur (wl-thread-entity-get-parent-entity cur))
 913         (if (null (setq num (wl-thread-entity-get-number cur))) ; top!
 914             (throw 'done nil))
 915         (if (and num
 916                  (eq mynumber (wl-thread-entity-get-number cur)))
 917             (throw 'done t)))
 918       nil)))
 919
 920 ;; (defun wl-thread-goto-bottom-of-sub-thread ()
 921 ;;   (interactive)
 922 ;;   (let ((depth (wl-thread-get-depth-of-current-line)))
 923 ;;     (forward-line 1)
 924 ;;     (while (and (not (eobp))
 925 ;;              (> (wl-thread-get-depth-of-current-line)
 926 ;;                 depth))
 927 ;;       (forward-line 1))
 928 ;;     (beginning-of-line)))
 929
 930 (defun wl-thread-goto-bottom-of-sub-thread (&optional msg)
 931   (interactive)
 932   (let ((mynumber (or msg (wl-summary-message-number))))
 933     (forward-line 1)
 934     (while (wl-thread-descendant-p mynumber (wl-summary-message-number))
 935       (forward-line 1))
 936     (beginning-of-line)))
 937
 938 (defun wl-thread-remove-destination-region (beg end)
 939   (save-excursion
 940     (save-restriction
 941       (narrow-to-region beg end)
 942       (goto-char (point-min))
 943       (while (not (eobp))
 944         (let ((num (wl-summary-message-number)))
 945           (if (assq num wl-summary-buffer-refile-list)
 946               (wl-summary-remove-destination)))
 947         (forward-line 1)))))
 948
 949 (defun wl-thread-print-destination-region (beg end)
 950   (if (or wl-summary-buffer-refile-list
 951           wl-summary-buffer-copy-list)
 952       (save-excursion
 953         (save-restriction
 954           (narrow-to-region beg end)
 955           (goto-char (point-min))
 956           (while (not (eobp))
 957             (let ((num (wl-summary-message-number))
 958                   pair)
 959               (if (or (setq pair (assq num wl-summary-buffer-refile-list))
 960                       (setq pair (assq num wl-summary-buffer-copy-list)))
 961                   (wl-summary-print-destination (car pair) (cdr pair))))
 962             (forward-line 1))))))
 963
 964 (defsubst wl-thread-get-children-msgs (msg &optional visible-only)
 965   (let ((msgs (list msg))
 966         msgs-stack children
 967         entity ret-val)
 968     (while msgs
 969       (wl-append ret-val (list (car msgs)))
 970       (setq children (wl-thread-entity-get-children
 971                       (setq entity (wl-thread-get-entity (car msgs)))))
 972       (if (and visible-only
 973                (not (wl-thread-entity-get-opened entity)))
 974           (setq children nil))
 975       (setq msgs (cdr msgs))
 976       (if (null children)
 977           (while (and (null msgs) msgs-stack)
 978             (setq msgs (wl-pop msgs-stack)))
 979         (wl-push msgs msgs-stack)
 980         (setq msgs children)))
 981     ret-val))
 982
 983 (defun wl-thread-get-children-msgs-uncached (msg &optional uncached-marks)
 984   (let ((children-msgs (wl-thread-get-children-msgs msg))
 985         (number-alist (elmo-msgdb-get-number-alist (wl-summary-buffer-msgdb)))
 986         mark
 987         uncached-list)
 988     (while children-msgs
 989       (if (and (not (eq msg (car children-msgs))) ; except itself
 990                (or (and uncached-marks
 991                         (setq mark (elmo-msgdb-get-mark
 992                                     (wl-summary-buffer-msgdb)
 993                                     (car children-msgs)))
 994                         (member mark uncached-marks))
 995                    (and (not uncached-marks)
 996                         (null (elmo-file-cache-exists-p
 997                                (elmo-message-field
 998                                 wl-summary-buffer-elmo-folder
 999                                 (car children-msgs)
1000                                 'message-id))))))
1001           (wl-append uncached-list (list (car children-msgs))))
1002       (setq children-msgs (cdr children-msgs)))
1003     uncached-list))
1004
1005 (defun wl-thread-get-children-msgs-with-mark (msg mark)
1006   (let ((children-msgs (wl-thread-get-children-msgs msg))
1007         (check-func (cond ((string= mark "o")
1008                            'wl-summary-msg-marked-as-refiled)
1009                           ((string= mark "O")
1010                            'wl-summary-msg-marked-as-copied)
1011                           ((string= mark "D")
1012                            'wl-summary-msg-marked-as-deleted)
1013                           ((string= mark "*")
1014                            'wl-summary-msg-marked-as-target)))
1015         ret-val)
1016     (while children-msgs
1017       (if (funcall check-func (car children-msgs))
1018           (wl-append ret-val (list (car children-msgs))))
1019       (setq children-msgs (cdr children-msgs)))
1020     ret-val))
1021
1022 (defun wl-thread-close (entity)
1023   (let (depth beg)
1024     (wl-thread-entity-set-opened entity nil)
1025     (setq depth (wl-thread-get-depth-of-current-line))
1026     (beginning-of-line)
1027     (setq beg (point))
1028     (wl-thread-goto-bottom-of-sub-thread)
1029     (wl-thread-remove-destination-region beg
1030                                          (point))
1031     (forward-char -1)   ;; needed for mouse-face.
1032     (delete-region beg (point))
1033     (wl-thread-insert-entity (- depth 1)
1034                              entity
1035                              (wl-thread-get-entity
1036                               (nth 3 entity))
1037                              nil)
1038     (delete-char 1) ; delete '\n'
1039     (wl-thread-print-destination-region beg (point))))
1040
1041 (defun wl-thread-open (entity)
1042   (let (depth beg)
1043     (beginning-of-line)
1044     (setq beg (point))
1045     (setq depth (wl-thread-get-depth-of-current-line))
1046     (end-of-line)
1047     (delete-region beg (point))
1048     (wl-thread-entity-set-opened entity t)
1049     (wl-thread-insert-entity depth ;(- depth 1)
1050                              entity
1051                              (wl-thread-get-entity
1052                               (nth 3 entity)) nil)
1053     (delete-char 1) ; delete '\n'
1054     (wl-thread-print-destination-region beg (point))))
1055
1056 (defun wl-thread-open-close (&optional force-open)
1057   (interactive "P")
1058   (when (eq wl-summary-buffer-view 'thread)
1059 ;;; (if (equal wl-thread-top-entity '(nil t nil nil))
1060 ;;;     (error "There's no thread structure"))
1061     (save-excursion
1062       (let ((inhibit-read-only t)
1063             (buffer-read-only nil)
1064             (wl-thread-insert-force-opened
1065              (or wl-thread-insert-force-opened
1066                  force-open))
1067             msg entity parent)
1068         (setq msg (wl-summary-message-number))
1069         (setq entity (wl-thread-get-entity msg))
1070         (if (wl-thread-entity-get-opened entity)
1071             ;; if already opened, close its child!
1072           (if (wl-thread-entity-get-children entity)
1073               (wl-thread-close entity)
1074             ;; opened, but has no children, close its parent!
1075             (when (setq parent (wl-thread-entity-get-parent entity))
1076               (wl-summary-jump-to-msg parent)
1077               (wl-thread-close
1078                (wl-thread-get-entity (wl-summary-message-number)))))
1079           ;; if closed (or it is just a thread bottom message)
1080           ;; has children, open it!
1081           (if (wl-thread-entity-get-children entity)
1082               (wl-thread-open entity)
1083             ;; closed, and has no children, close its parent!
1084             (setq msg (or (wl-thread-entity-get-parent entity)
1085                           (wl-thread-entity-get-number entity)))
1086             (when msg
1087               (wl-summary-jump-to-msg msg)
1088               (wl-thread-close
1089                (wl-thread-get-entity (wl-summary-message-number)))))))
1090       (wl-summary-set-message-modified)
1091       (set-buffer-modified-p nil))))
1092
1093 (defun wl-thread-get-depth-of-current-line ()
1094   (let ((entity (wl-thread-get-entity (wl-summary-message-number)))
1095         (depth 0)
1096         number)
1097     (while (setq number (wl-thread-entity-get-parent entity))
1098       (incf depth)
1099       (setq entity (wl-thread-get-entity number)))
1100     depth))
1101
1102 (defun wl-thread-update-indent-string-region (beg end)
1103   (interactive "r")
1104   (save-excursion
1105     (goto-char beg)
1106     (while (< (point) end)
1107       ;(wl-thread-update-indent-string)
1108       (wl-thread-update-line-on-buffer)
1109       (forward-line 1))))
1110
1111 (defsubst wl-thread-make-indent-string (entity)
1112   (let ((cur entity)
1113         (ret-val "")
1114         (space-str (wl-repeat-string wl-thread-space-str-internal
1115                                      (- wl-thread-indent-level-internal 1)))
1116         parent)
1117     (when (wl-thread-entity-get-number
1118            (setq parent (wl-thread-entity-get-parent-entity cur)))
1119       (if (wl-thread-entity-get-younger-brothers cur)
1120           (setq ret-val wl-thread-have-younger-brother-str-internal)
1121         (setq ret-val wl-thread-youngest-child-str-internal))
1122       (setq ret-val (concat ret-val
1123                             (wl-repeat-string
1124                              wl-thread-horizontal-str-internal
1125                              (- wl-thread-indent-level-internal 1))))
1126       (setq cur parent)
1127       (while (wl-thread-entity-get-number
1128               (wl-thread-entity-get-parent-entity cur))
1129         (if (wl-thread-entity-get-younger-brothers cur)
1130             (setq ret-val (concat wl-thread-vertical-str-internal
1131                                   space-str
1132                                   ret-val))
1133           (setq ret-val (concat wl-thread-space-str-internal
1134                                 space-str
1135                                 ret-val)))
1136         (setq cur (wl-thread-entity-get-parent-entity cur))))
1137     ret-val))
1138
1139 (defun wl-thread-set-parent (&optional parent-number)
1140   "Set current message's parent interactively."
1141   (interactive)
1142   (let ((number (wl-summary-message-number))
1143         (dst-parent (if (interactive-p)
1144                         (read-from-minibuffer "Parent Message (No.): ")))
1145         entity dst-parent-entity src-parent children
1146         update-msgs
1147         buffer-read-only)
1148     (if (string= dst-parent "")
1149         (setq dst-parent nil)
1150       (if (interactive-p)
1151           (setq dst-parent (string-to-int dst-parent))
1152         (setq dst-parent parent-number)))
1153     (if (and dst-parent
1154              (memq dst-parent (wl-thread-get-children-msgs number)))
1155         (error "Parent is children or myself"))
1156     (setq entity (wl-thread-get-entity number))
1157     (when (and number entity)
1158       ;; delete thread
1159       (setq update-msgs (wl-thread-delete-message number 'deep))
1160       ;; insert as child at new parent
1161       (setq dst-parent-entity (wl-thread-get-entity dst-parent))
1162       (if dst-parent-entity
1163           (progn
1164             (if (setq children
1165                       (wl-thread-entity-get-children dst-parent-entity))
1166                 (wl-append update-msgs
1167                            (wl-thread-get-children-msgs
1168                             (car (last children)) t)))
1169             (wl-thread-entity-set-children
1170              dst-parent-entity
1171              (append children (list number)))
1172             (wl-thread-entity-set-linked entity t))
1173         ;; insert as top
1174         (wl-append wl-thread-entity-list (list number))
1175         (wl-thread-entity-set-linked entity nil))
1176
1177       ;; update my thread
1178       (wl-append update-msgs (wl-thread-get-children-msgs number t))
1179       (setq update-msgs (elmo-uniq-list update-msgs))
1180       (wl-thread-entity-set-parent entity dst-parent)
1181       ;; update thread on buffer
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