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   (let ((mark-alist (elmo-msgdb-get-mark-alist (wl-summary-buffer-msgdb)))
 372         mark)
 373     (while mark-alist
 374       (if (setq mark (nth 1 (car mark-alist)))
 375           (if (or (string= mark wl-summary-unread-uncached-mark)
 376                   (string= mark wl-summary-unread-cached-mark)
 377                   (string= mark wl-summary-new-mark)
 378                   (string= mark wl-summary-important-mark))
 379               (wl-thread-entity-force-open (wl-thread-get-entity
 380                                             (nth 0 (car mark-alist))))))
 381       (setq mark-alist (cdr mark-alist)))))
 382
 383 (defsubst wl-thread-maybe-get-children-num (msg)
 384   (let ((entity (wl-thread-get-entity msg)))
 385     (if (not (wl-thread-entity-get-opened entity))
 386         (wl-thread-entity-get-children-num entity))))
 387
 388 (defsubst wl-thread-update-line-on-buffer-sub (entity msg &optional parent-msg)
 389   (let* ((entity (or entity (wl-thread-get-entity msg)))
 390          (parent-msg (or parent-msg (wl-thread-entity-get-parent entity)))
 391          (overview (elmo-msgdb-get-overview (wl-summary-buffer-msgdb)))
 392          (mark-alist (elmo-msgdb-get-mark-alist (wl-summary-buffer-msgdb)))
 393          (buffer-read-only nil)
 394          (inhibit-read-only t)
 395          overview-entity temp-mark summary-line invisible-top dest-pair)
 396     (if (wl-thread-delete-line-from-buffer msg)
 397         (progn
 398           (cond
 399            ((memq msg wl-summary-buffer-delete-list)
 400             (setq temp-mark "D"))
 401            ((memq msg wl-summary-buffer-target-mark-list)
 402             (setq temp-mark "*"))
 403            ((setq dest-pair (assq msg wl-summary-buffer-refile-list))
 404             (setq temp-mark "o"))
 405            ((setq dest-pair (assq msg wl-summary-buffer-copy-list))
 406             (setq temp-mark "O"))
 407            (t (setq temp-mark (wl-summary-get-score-mark msg))))
 408           (when (setq overview-entity
 409                       (elmo-msgdb-overview-get-entity
 410                        msg (wl-summary-buffer-msgdb)))
 411             (setq summary-line
 412                   (wl-summary-overview-create-summary-line
 413                    msg
 414                    overview-entity
 415                    (elmo-msgdb-overview-get-entity
 416                     parent-msg (wl-summary-buffer-msgdb))
 417                    nil
 418                    mark-alist
 419                    (if wl-thread-insert-force-opened
 420                        nil
 421                      (wl-thread-maybe-get-children-num msg))
 422                    temp-mark entity))
 423             (save-excursion
 424               (wl-summary-insert-line summary-line))
 425             (if dest-pair
 426                 (wl-summary-print-destination (car dest-pair)
 427                                               (cdr dest-pair)))))
 428       ;; insert thread (moving thread)
 429       (if (not (setq invisible-top
 430                      (wl-thread-entity-parent-invisible-p entity)))
 431           (wl-summary-update-thread
 432            (elmo-msgdb-overview-get-entity msg (wl-summary-buffer-msgdb))
 433            overview
 434            mark-alist
 435            entity
 436            (and parent-msg
 437                 (elmo-msgdb-overview-get-entity
 438                  parent-msg (wl-summary-buffer-msgdb))))
 439         ;; currently invisible.. update closed line.
 440         (wl-thread-update-children-number invisible-top)))))
 441
 442 (defun wl-thread-update-line-on-buffer (&optional msg parent-msg updates)
 443   (interactive)
 444   (let ((msgs (list (or msg (wl-summary-message-number))))
 445         entity children msgs-stack)
 446    (while msgs
 447     (setq msg (wl-pop msgs))
 448     (setq updates (and updates (delete msg updates)))
 449     (setq entity (wl-thread-get-entity msg))
 450     (wl-thread-update-line-on-buffer-sub entity msg parent-msg)
 451     ;;
 452     (setq children (wl-thread-entity-get-children entity))
 453     (if children
 454         ;; update children
 455         (when (wl-thread-entity-get-opened entity)
 456           (wl-push msgs msgs-stack)
 457           (setq parent-msg msg
 458                 msgs children))
 459       (unless msgs
 460         (while (and (null msgs) msgs-stack)
 461           (setq msgs (wl-pop msgs-stack)))
 462         (when msgs
 463           (setq parent-msg
 464                 (wl-thread-entity-get-number
 465                  (wl-thread-entity-get-parent-entity
 466                   (wl-thread-get-entity (car msgs)))))))))
 467    updates))
 468
 469 (defun wl-thread-update-line-msgs (msgs &optional no-msg)
 470   (wl-delete-all-overlays)
 471   (let ((i 0)
 472         (updates msgs)
 473         len)
 474 ;;; (while msgs
 475 ;;;   (setq updates
 476 ;;;         (append updates
 477 ;;;                 (wl-thread-get-children-msgs (car msgs))))
 478 ;;;   (setq msgs (cdr msgs)))
 479 ;;; (setq updates (elmo-uniq-list updates))
 480     (setq len (length updates))
 481     (while updates
 482       (wl-thread-update-line-on-buffer-sub nil (car updates))
 483       (setq updates (cdr updates))
 484       (when (and (not no-msg)
 485                  (> len elmo-display-progress-threshold))
 486         (setq i (1+ i))
 487         (if (or (zerop (% i 5)) (= i len))
 488             (elmo-display-progress
 489              'wl-thread-update-line-msgs "Updating deleted thread..."
 490              (/ (* i 100) len)))))))
 491
 492 (defun wl-thread-delete-line-from-buffer (msg)
 493   "Simply delete msg line."
 494   (let (beg)
 495     (if (wl-summary-jump-to-msg msg)
 496         (progn
 497           (setq beg (point))
 498           (forward-line 1)
 499           (delete-region beg (point))
 500           t)
 501       nil)))
 502
 503 (defun wl-thread-cleanup-symbols (msgs)
 504   (let (entity)
 505     (while msgs
 506       (when (setq entity (wl-thread-get-entity (car msgs)))
 507         ;; delete entity.
 508         (setq wl-thread-entities (delq entity wl-thread-entities))
 509         ;; free symbol.
 510         (elmo-clear-hash-val (format "#%d" (car msgs))
 511                              wl-thread-entity-hashtb))
 512       (setq msgs (cdr msgs)))))
 513
 514 (defun wl-thread-get-exist-children (msg)
 515   (let ((msgs (list msg))
 516         msgs-stack children
 517         entity ret-val)
 518     (while msgs
 519       (setq children (wl-thread-entity-get-children
 520                       (setq entity (wl-thread-get-entity (car msgs)))))
 521       (when (elmo-msgdb-overview-get-entity (car msgs) (wl-summary-buffer-msgdb))
 522         (wl-append ret-val (list (car msgs)))
 523         (setq children nil))
 524       (setq msgs (cdr msgs))
 525       (if (null children)
 526           (while (and (null msgs) msgs-stack)
 527             (setq msgs (wl-pop msgs-stack)))
 528         (wl-push msgs msgs-stack)
 529         (setq msgs children)))
 530     ret-val))
 531
 532 (defun wl-thread-delete-message (msg &optional deep update)
 533   "Delete MSG from entity and buffer."
 534   (save-excursion
 535     (let* ((entity (wl-thread-get-entity msg))
 536            children older-brothers younger-brothers top-child ;;grandchildren
 537            top-entity parent update-msgs beg invisible-top)
 538       (when entity
 539         (setq parent (wl-thread-entity-get-parent-entity entity))
 540         (if parent
 541             (progn
 542 ;;; has parent.
 543 ;;;           (setq brothers (wl-thread-entity-get-children parent))
 544               (setq older-brothers (wl-thread-entity-get-older-brothers
 545                                     entity parent))
 546               (setq younger-brothers (wl-thread-entity-get-younger-brothers
 547                                       entity parent))
 548               ;;
 549               (unless deep
 550                 (setq children (wl-thread-entity-get-children entity))
 551                 (wl-thread-reparent-children
 552                  children (wl-thread-entity-get-number parent))
 553                 (setq update-msgs
 554                       (apply (function nconc)
 555                              update-msgs
 556                              (mapcar
 557                               (function
 558                                (lambda (message)
 559                                  (wl-thread-get-children-msgs message t)))
 560                               children))))
 561               (wl-thread-entity-set-children
 562                parent (append older-brothers children younger-brothers))
 563               ;; If chidren and younger-brothers not exists,
 564               ;; update nearly older brother.
 565               (when (and older-brothers
 566                          (not younger-brothers)
 567                          (not children))
 568                 (wl-append
 569                  update-msgs
 570                  (wl-thread-get-children-msgs (car (last older-brothers))))))
 571
 572           ;; top...oldest child becomes top.
 573           (unless deep
 574             (setq children (wl-thread-entity-get-children entity))
 575             (when children
 576               (setq top-child (car children)
 577                     children (cdr children))
 578               (setq top-entity (wl-thread-get-entity top-child))
 579               (wl-thread-entity-set-parent top-entity nil)
 580               (wl-thread-entity-set-linked top-entity nil)
 581               (wl-append update-msgs
 582                          (wl-thread-get-children-msgs top-child t)))
 583             (when children
 584               (wl-thread-entity-set-children
 585                top-entity
 586                (append
 587                 (wl-thread-entity-get-children top-entity)
 588                 children))
 589               (wl-thread-reparent-children children top-child)
 590               (wl-append update-msgs children)))
 591           ;; delete myself from top list.
 592           (setq wl-summary-buffer-number-list
 593                 (delq msg wl-summary-buffer-number-list))
 594           (setq older-brothers (wl-thread-entity-get-older-brothers
 595                                 entity nil))
 596           (setq younger-brothers (wl-thread-entity-get-younger-brothers
 597                                   entity nil))
 598           (setq wl-thread-entity-list
 599                 (append (append older-brothers
 600                                 (and top-child (list top-child)))
 601                         younger-brothers))))
 602
 603       (if deep
 604           ;; delete thread on buffer
 605           (when (wl-summary-jump-to-msg msg)
 606             (setq beg (point))
 607             (wl-thread-goto-bottom-of-sub-thread)
 608             (delete-region beg (point)))
 609         ;; delete myself from buffer.
 610         (unless (wl-thread-delete-line-from-buffer msg)
 611           ;; jump to suitable point.
 612           ;; just upon the oldest younger-brother of my top.
 613           (setq invisible-top
 614                 (car (wl-thread-entity-parent-invisible-p entity)))
 615           (if invisible-top
 616               (progn
 617                 (wl-append update-msgs (list invisible-top))
 618                 (wl-summary-jump-to-msg invisible-top))
 619             (goto-char (point-max))))
 620
 621         ;; insert children if thread is closed or delete top.
 622         (when (or top-child
 623                   (not (wl-thread-entity-get-opened entity)))
 624           (let* (next-top insert-msgs ent e grandchildren)
 625             (if top-child
 626                 (progn
 627                   (setq insert-msgs (wl-thread-get-exist-children top-child))
 628                   (setq next-top (car insert-msgs))
 629                   (setq ent (wl-thread-get-entity next-top))
 630                   (when (and
 631                          (wl-thread-entity-get-opened entity) ;; open
 632                          (not (wl-thread-entity-get-opened ent)) ;; close
 633                          (setq grandchildren
 634                                (wl-thread-entity-get-children ent))
 635                          (wl-summary-jump-to-msg next-top))
 636                     (forward-line 1)
 637                     (setq insert-msgs (append (cdr insert-msgs) grandchildren)))
 638                   (when top-entity (wl-thread-entity-set-opened top-entity t))
 639                   (when ent (wl-thread-entity-set-opened ent t)))
 640               (when (not invisible-top)
 641                 (setq insert-msgs (wl-thread-get-exist-children msg))
 642                 ;; First msg always opened, because first msg maybe becomes top.
 643                 (if (setq ent (wl-thread-get-entity (car insert-msgs)))
 644                     (wl-thread-entity-set-opened ent t))))
 645             ;; insert children
 646             (while insert-msgs
 647               ;; if no exists in summary, insert entity.
 648               (when (and (car insert-msgs)
 649                          (not (wl-summary-jump-to-msg (car insert-msgs))))
 650                 (setq ent (wl-thread-get-entity (car insert-msgs)))
 651                 (wl-thread-insert-entity 0 ; no mean now...
 652                                          ent entity nil))
 653               (setq insert-msgs (cdr insert-msgs))))))
 654       (if update
 655           ;; modify buffer.
 656           (while update-msgs
 657             (wl-thread-update-line-on-buffer-sub nil (pop update-msgs)))
 658         ;; don't update buffer
 659         update-msgs)))) ; return value
 660
 661 (defun wl-thread-insert-message (overview-entity overview mark-alist
 662                                  msg parent-msg &optional update linked)
 663   "Insert MSG to the entity.
 664 When optional argument UPDATE is non-nil,
 665 Message is inserted to the summary buffer."
 666   (let ((parent (wl-thread-get-entity parent-msg))
 667         child-entity invisible-top)
 668 ;;; Update the thread view...not implemented yet.
 669 ;;;  (when force-insert
 670 ;;;    (if parent
 671 ;;;       (wl-thread-entity-force-open parent))
 672     (if parent
 673         ;; insert as children.
 674         (wl-thread-entity-insert-as-children
 675          parent
 676          (setq child-entity (wl-thread-create-entity msg (nth 0 parent) nil linked)))
 677       ;; insert as top message.
 678       (wl-thread-entity-insert-as-top
 679        (wl-thread-create-entity msg nil)))
 680     (if update
 681         (if (not (setq invisible-top
 682                        (wl-thread-entity-parent-invisible-p child-entity)))
 683             ;; visible.
 684             (progn
 685               (wl-summary-update-thread
 686                overview-entity
 687                overview
 688                mark-alist
 689                child-entity
 690                (elmo-msgdb-overview-get-entity
 691                 parent-msg (wl-summary-buffer-msgdb)))
 692               (when parent
 693                 ;; use thread structure.
 694                 (wl-thread-entity-get-nearly-older-brother
 695                  child-entity parent))) ; return value
 696 ;;;             (wl-thread-entity-get-number
 697 ;;;              (wl-thread-entity-get-top-entity parent)))) ; return value;
 698 ;;;           (setq beg (point))
 699 ;;;           (wl-thread-goto-bottom-of-sub-thread)
 700 ;;;           (wl-thread-update-indent-string-region beg (point)))
 701           ;; currently invisible.. update closed line.
 702           (wl-thread-update-children-number invisible-top)
 703           nil))))
 704
 705 (defun wl-thread-get-parent-list (msgs)
 706   (let* ((msgs2 msgs)
 707          myself)
 708     (while msgs2
 709       (setq myself (car msgs2)
 710             msgs2 (cdr msgs2))
 711       (while (not (eq myself (car msgs2)))
 712         (if (wl-thread-descendant-p myself (car msgs2))
 713             (setq msgs (delq (car msgs2) msgs)))
 714         (setq msgs2 (or (cdr msgs2) msgs)))
 715       (setq msgs2 (cdr msgs2)))
 716     msgs))
 717
 718 (defun wl-thread-update-indent-string-thread (top-list)
 719   (let ((top-list (wl-thread-get-parent-list top-list))
 720         beg)
 721     (while top-list
 722       (when (car top-list)
 723         (wl-summary-jump-to-msg (car top-list))
 724         (setq beg (point))
 725         (wl-thread-goto-bottom-of-sub-thread)
 726         (wl-thread-update-indent-string-region beg (point)))
 727       (setq top-list (cdr top-list)))))
 728
 729 (defun wl-thread-update-children-number (entity)
 730   "Update the children number."
 731   (save-excursion
 732     (wl-summary-jump-to-msg (wl-thread-entity-get-number entity))
 733     (beginning-of-line)
 734     (let ((text-prop (get-text-property (point) 'face))
 735           from from-end beg str)
 736       (cond
 737        ((looking-at (concat "^" wl-summary-buffer-number-regexp
 738                             "..../..\(.*\)..:.. ["
 739                             wl-thread-indent-regexp
 740                             "]*[[<]\\+\\([0-9]+\\):"))
 741         (delete-region (match-beginning 1)(match-end 1))
 742         (goto-char (match-beginning 1))
 743         (setq str (format "%s" (wl-thread-entity-get-children-num entity)))
 744         (if wl-summary-highlight
 745             (put-text-property 0 (length str) 'face text-prop str))
 746         (insert str))
 747        ((looking-at (concat "^" wl-summary-buffer-number-regexp
 748                             "..../..\(.*\)..:.. ["
 749                             wl-thread-indent-regexp
 750                             "]*[[<]"))
 751         (goto-char (match-end 0))
 752         (setq beg (current-column))
 753         (setq from-end (save-excursion
 754                          (move-to-column (+ 1 beg wl-from-width))
 755                          (point)))
 756         (setq from (buffer-substring (match-end 0) from-end))
 757         (delete-region (match-end 0) from-end)
 758         (setq str (wl-set-string-width
 759                    (1+ wl-from-width)
 760                    (format
 761                     "+%s:%s"
 762                     (wl-thread-entity-get-children-num
 763                      entity)
 764                     from)))
 765         (if wl-summary-highlight
 766             (put-text-property 0 (length str) 'face text-prop str))
 767         (insert str)
 768         (condition-case nil ; it's dangerous, so ignore error.
 769             (run-hooks 'wl-thread-update-children-number-hook)
 770           (error
 771            (ding)
 772            (message "Error in wl-thread-update-children-number-hook."))))))))
 773
 774 ;;
 775 ;; Thread oriented commands.
 776 ;;
 777 (defun wl-thread-call-region-func (func &optional arg)
 778   (save-excursion
 779     (if arg
 780         (wl-summary-goto-top-of-current-thread)
 781       (beginning-of-line))
 782     (let ((beg (point)))
 783       (wl-thread-goto-bottom-of-sub-thread)
 784       (funcall func beg (point)))))
 785
 786 (defun wl-thread-prefetch (&optional arg)
 787   (interactive "P")
 788   (wl-thread-call-region-func 'wl-summary-prefetch-region arg))
 789
 790 (defun wl-thread-msg-mark-as-important (msg)
 791   "Set mark as important for invisible MSG. Modeline is not changed."
 792   (let* ((msgdb (wl-summary-buffer-msgdb))
 793          (mark-alist (elmo-msgdb-get-mark-alist msgdb))
 794          cur-mark)
 795     (setq cur-mark (cadr (assq msg mark-alist)))
 796     (setq mark-alist
 797           (elmo-msgdb-mark-set mark-alist
 798                                msg
 799                                (if (string= cur-mark wl-summary-important-mark)
 800                                    nil
 801                                  wl-summary-important-mark)))
 802     (elmo-msgdb-set-mark-alist msgdb mark-alist)
 803     (wl-summary-set-mark-modified)))
 804
 805 (defun wl-thread-mark-as-read (&optional arg)
 806   (interactive "P")
 807   (wl-thread-call-region-func 'wl-summary-mark-as-read-region arg))
 808
 809 (defun wl-thread-mark-as-unread (&optional arg)
 810   (interactive "P")
 811   (wl-thread-call-region-func 'wl-summary-mark-as-unread-region arg))
 812
 813 (defun wl-thread-mark-as-important (&optional arg)
 814   (interactive "P")
 815   (wl-thread-call-region-func 'wl-summary-mark-as-important-region arg))
 816
 817 (defun wl-thread-copy (&optional arg)
 818   (interactive "P")
 819   (wl-thread-call-region-func 'wl-summary-copy-region arg))
 820
 821 (defun wl-thread-refile (&optional arg)
 822   (interactive "P")
 823   (condition-case err
 824       (progn
 825         (wl-thread-call-region-func 'wl-summary-refile-region arg)
 826         (if arg
 827             (wl-summary-goto-top-of-current-thread))
 828         (wl-thread-goto-bottom-of-sub-thread))
 829     (error
 830      (elmo-display-error err t)
 831      nil)))
 832
 833 (defun wl-thread-delete (&optional arg)
 834   (interactive "P")
 835   (wl-thread-call-region-func 'wl-summary-delete-region arg)
 836   (if arg
 837       (wl-summary-goto-top-of-current-thread))
 838   (if (not wl-summary-move-direction-downward)
 839       (wl-summary-prev)
 840     (wl-thread-goto-bottom-of-sub-thread)
 841     (if wl-summary-buffer-disp-msg
 842         (wl-summary-redisplay))))
 843
 844 (defun wl-thread-target-mark (&optional arg)
 845   (interactive "P")
 846   (wl-thread-call-region-func 'wl-summary-target-mark-region arg))
 847
 848 (defun wl-thread-unmark (&optional arg)
 849   (interactive "P")
 850   (wl-thread-call-region-func 'wl-summary-unmark-region arg))
 851
 852 (defun wl-thread-exec (&optional arg)
 853   (interactive "P")
 854   (wl-thread-call-region-func 'wl-summary-exec-region arg))
 855
 856 (defun wl-thread-save (&optional arg)
 857   (interactive "P")
 858   (wl-thread-call-region-func 'wl-summary-save-region arg))
 859
 860 (defun wl-thread-force-open (&optional msg-num)
 861   "force open current folder"
 862   (if msg-num
 863       (wl-summary-jump-to-msg msg-num))
 864   (let ((wl-thread-insert-force-opened t))
 865     (wl-thread-open-close)))
 866
 867 (defun wl-thread-entity-force-open (entity)
 868   (let ((wl-thread-insert-force-opened t)
 869         notopen)
 870     (if (null (wl-thread-entity-get-parent entity))
 871         ;; top!!
 872         (if (and (not (wl-thread-entity-get-opened entity))
 873                  (wl-thread-entity-get-children entity))
 874             (wl-thread-force-open (wl-thread-entity-get-number entity)))
 875       (if (setq notopen (wl-thread-entity-parent-invisible-p entity))
 876           (wl-thread-force-open (wl-thread-entity-get-number notopen))))))
 877
 878 (defun wl-thread-insert-top ()
 879   (let ((elist wl-thread-entity-list)
 880         (len (length wl-thread-entity-list))
 881         (cur 0))
 882     (wl-delete-all-overlays)
 883     (while elist
 884       (wl-thread-insert-entity
 885        0
 886        (wl-thread-get-entity (car elist))
 887        nil
 888        len)
 889       (setq elist (cdr elist))
 890       (when (> len elmo-display-progress-threshold)
 891         (setq cur (1+ cur))
 892         (if (or (zerop (% cur 2)) (= cur len))
 893             (elmo-display-progress
 894              'wl-thread-insert-top "Inserting thread..."
 895              (/ (* cur 100) len)))))))
 896
 897 (defsubst wl-thread-insert-entity-sub (indent entity parent-entity all)
 898   (let ((mark-alist (elmo-msgdb-get-mark-alist (wl-summary-buffer-msgdb)))
 899         msg-num
 900         overview-entity
 901         temp-mark
 902         summary-line)
 903     (when (setq msg-num (wl-thread-entity-get-number entity))
 904       (unless all ; all...means no temp-mark.
 905         (cond ((memq msg-num wl-summary-buffer-delete-list)
 906                (setq temp-mark "D"))
 907               ((memq msg-num wl-summary-buffer-target-mark-list)
 908                (setq temp-mark "*"))
 909               ((assq msg-num wl-summary-buffer-refile-list)
 910                (setq temp-mark "o"))
 911               ((assq msg-num wl-summary-buffer-copy-list)
 912                (setq temp-mark "O"))))
 913       (unless temp-mark
 914         (setq temp-mark (wl-summary-get-score-mark msg-num)))
 915       (setq overview-entity
 916             (elmo-msgdb-overview-get-entity
 917              (nth 0 entity) (wl-summary-buffer-msgdb)))
 918 ;;;   (wl-delete-all-overlays)
 919       (when overview-entity
 920         (setq summary-line
 921               (wl-summary-overview-create-summary-line
 922                msg-num
 923                overview-entity
 924                (elmo-msgdb-overview-get-entity
 925                 (nth 0 parent-entity) (wl-summary-buffer-msgdb))
 926                (1+ indent)
 927                mark-alist
 928                (if wl-thread-insert-force-opened
 929                    nil
 930                  (wl-thread-maybe-get-children-num msg-num))
 931                temp-mark entity))
 932         (wl-summary-insert-line summary-line)))))
 933
 934 (defun wl-thread-insert-entity (indent entity parent-entity all)
 935   "Insert thread entity in current buffer."
 936   (let ((msgs (list (car entity)))
 937         children msgs-stack)
 938     (while msgs
 939       (wl-thread-insert-entity-sub indent entity parent-entity all)
 940       (setq msgs (cdr msgs))
 941       (setq children (nth 2 entity))
 942       (if children
 943           ;; insert children
 944           (when (or wl-thread-insert-force-opened
 945                     (wl-thread-entity-get-opened entity))
 946             (wl-thread-entity-set-opened entity t)
 947             (wl-push msgs msgs-stack)
 948             (setq msgs children
 949                   indent (1+ indent)
 950                   parent-entity entity)))
 951       (unless msgs
 952         (while (and (null msgs) msgs-stack)
 953           (setq msgs (wl-pop msgs-stack))
 954           (setq indent (1- indent)))
 955         (when msgs
 956           (setq entity (wl-thread-get-entity (car msgs)))
 957           (setq parent-entity (wl-thread-entity-get-parent-entity entity))))
 958       (setq entity (wl-thread-get-entity (car msgs))))))
 959
 960 (defun wl-thread-descendant-p (mynumber number)
 961   (let ((cur (wl-thread-get-entity number))
 962         num)
 963     (catch 'done
 964       (while cur
 965         (setq cur (wl-thread-entity-get-parent-entity cur))
 966         (if (null (setq num (wl-thread-entity-get-number cur))) ; top!
 967             (throw 'done nil))
 968         (if (and num
 969                  (eq mynumber (wl-thread-entity-get-number cur)))
 970             (throw 'done t)))
 971       nil)))
 972
 973 ;; (defun wl-thread-goto-bottom-of-sub-thread ()
 974 ;;   (interactive)
 975 ;;   (let ((depth (wl-thread-get-depth-of-current-line)))
 976 ;;     (forward-line 1)
 977 ;;     (while (and (not (eobp))
 978 ;;              (> (wl-thread-get-depth-of-current-line)
 979 ;;                 depth))
 980 ;;       (forward-line 1))
 981 ;;     (beginning-of-line)))
 982
 983 (defun wl-thread-goto-bottom-of-sub-thread (&optional msg)
 984   (interactive)
 985   (let ((mynumber (or msg (wl-summary-message-number))))
 986     (forward-line 1)
 987     (while (wl-thread-descendant-p mynumber (wl-summary-message-number))
 988       (forward-line 1))
 989     (beginning-of-line)))
 990
 991 (defun wl-thread-remove-destination-region (beg end)
 992   (save-excursion
 993     (save-restriction
 994       (narrow-to-region beg end)
 995       (goto-char (point-min))
 996       (while (not (eobp))
 997         (let ((num (wl-summary-message-number)))
 998           (if (assq num wl-summary-buffer-refile-list)
 999               (wl-summary-remove-destination)))
1000         (forward-line 1)))))
1001
1002 (defun wl-thread-print-destination-region (beg end)
1003   (if (or wl-summary-buffer-refile-list
1004           wl-summary-buffer-copy-list)
1005       (save-excursion
1006         (save-restriction
1007           (narrow-to-region beg end)
1008           (goto-char (point-min))
1009           (while (not (eobp))
1010             (let ((num (wl-summary-message-number))
1011                   pair)
1012               (if (or (setq pair (assq num wl-summary-buffer-refile-list))
1013                       (setq pair (assq num wl-summary-buffer-copy-list)))
1014                   (wl-summary-print-destination (car pair) (cdr pair))))
1015             (forward-line 1))))))
1016
1017 (defsubst wl-thread-get-children-msgs (msg &optional visible-only)
1018   (let ((msgs (list msg))
1019         msgs-stack children
1020         entity ret-val)
1021     (while msgs
1022       (wl-append ret-val (list (car msgs)))
1023       (setq children (wl-thread-entity-get-children
1024                       (setq entity (wl-thread-get-entity (car msgs)))))
1025       (if (and visible-only
1026                (not (wl-thread-entity-get-opened entity)))
1027           (setq children nil))
1028       (setq msgs (cdr msgs))
1029       (if (null children)
1030           (while (and (null msgs) msgs-stack)
1031             (setq msgs (wl-pop msgs-stack)))
1032         (wl-push msgs msgs-stack)
1033         (setq msgs children)))
1034     ret-val))
1035
1036 (defun wl-thread-get-children-msgs-uncached (msg &optional uncached-marks)
1037   (let ((children-msgs (wl-thread-get-children-msgs msg))
1038         (mark-alist (elmo-msgdb-get-mark-alist (wl-summary-buffer-msgdb)))
1039         (number-alist (elmo-msgdb-get-number-alist (wl-summary-buffer-msgdb)))
1040         mark
1041         uncached-list)
1042     (while children-msgs
1043       (if (and (not (eq msg (car children-msgs))) ; except itself
1044                (or (and uncached-marks
1045                         (setq mark (cadr (assq (car children-msgs)
1046                                                mark-alist)))
1047                         (member mark uncached-marks))
1048                    (and (not uncached-marks)
1049                         (null (elmo-file-cache-exists-p
1050                                (elmo-message-field
1051                                 wl-summary-buffer-elmo-folder
1052                                 (car children-msgs)
1053                                 'message-id))))))
1054           (wl-append uncached-list (list (car children-msgs))))
1055       (setq children-msgs (cdr children-msgs)))
1056     uncached-list))
1057
1058 (defun wl-thread-get-children-msgs-with-mark (msg mark)
1059   (let ((children-msgs (wl-thread-get-children-msgs msg))
1060         (check-func (cond ((string= mark "o")
1061                            'wl-summary-msg-marked-as-refiled)
1062                           ((string= mark "O")
1063                            'wl-summary-msg-marked-as-copied)
1064                           ((string= mark "D")
1065                            'wl-summary-msg-marked-as-deleted)
1066                           ((string= mark "*")
1067                            'wl-summary-msg-marked-as-target)))
1068         ret-val)
1069     (while children-msgs
1070       (if (funcall check-func (car children-msgs))
1071           (wl-append ret-val (list (car children-msgs))))
1072       (setq children-msgs (cdr children-msgs)))
1073     ret-val))
1074
1075 (defun wl-thread-close (entity)
1076   (let (depth beg)
1077     (wl-thread-entity-set-opened entity nil)
1078     (setq depth (wl-thread-get-depth-of-current-line))
1079     (beginning-of-line)
1080     (setq beg (point))
1081     (wl-thread-goto-bottom-of-sub-thread)
1082     (wl-thread-remove-destination-region beg
1083                                          (point))
1084     (forward-char -1)   ;; needed for mouse-face.
1085     (delete-region beg (point))
1086     (wl-thread-insert-entity (- depth 1)
1087                              entity
1088                              (wl-thread-get-entity
1089                               (nth 3 entity))
1090                              nil)
1091     (delete-char 1) ; delete '\n'
1092     (wl-thread-print-destination-region beg (point))))
1093
1094 (defun wl-thread-open (entity)
1095   (let (depth beg)
1096     (beginning-of-line)
1097     (setq beg (point))
1098     (setq depth (wl-thread-get-depth-of-current-line))
1099     (end-of-line)
1100     (delete-region beg (point))
1101     (wl-thread-entity-set-opened entity t)
1102     (wl-thread-insert-entity depth ;(- depth 1)
1103                              entity
1104                              (wl-thread-get-entity
1105                               (nth 3 entity)) nil)
1106     (delete-char 1) ; delete '\n'
1107     (wl-thread-print-destination-region beg (point))))
1108
1109 (defun wl-thread-open-close (&optional force-open)
1110   (interactive "P")
1111   (when (eq wl-summary-buffer-view 'thread)
1112 ;;; (if (equal wl-thread-top-entity '(nil t nil nil))
1113 ;;;     (error "There's no thread structure"))
1114     (save-excursion
1115       (let ((inhibit-read-only t)
1116             (buffer-read-only nil)
1117             (wl-thread-insert-force-opened
1118              (or wl-thread-insert-force-opened
1119                  force-open))
1120             msg entity parent)
1121         (setq msg (wl-summary-message-number))
1122         (setq entity (wl-thread-get-entity msg))
1123         (if (wl-thread-entity-get-opened entity)
1124             ;; if already opened, close its child!
1125           (if (wl-thread-entity-get-children entity)
1126               (wl-thread-close entity)
1127             ;; opened, but has no children, close its parent!
1128             (when (setq parent (wl-thread-entity-get-parent entity))
1129               (wl-summary-jump-to-msg parent)
1130               (wl-thread-close
1131                (wl-thread-get-entity (wl-summary-message-number)))))
1132           ;; if closed (or it is just a thread bottom message)
1133           ;; has children, open it!
1134           (if (wl-thread-entity-get-children entity)
1135               (wl-thread-open entity)
1136             ;; closed, and has no children, close its parent!
1137             (setq msg (or (wl-thread-entity-get-parent entity)
1138                           (wl-thread-entity-get-number entity)))
1139             (when msg
1140               (wl-summary-jump-to-msg msg)
1141               (wl-thread-close
1142                (wl-thread-get-entity (wl-summary-message-number)))))))
1143       (wl-summary-set-message-modified)
1144       (set-buffer-modified-p nil))))
1145
1146
1147 (defun wl-thread-get-depth-of-current-line ()
1148   (interactive)
1149   (save-excursion
1150     (beginning-of-line)
1151     (let ((depth 0))
1152       (if (re-search-forward (concat "^" wl-summary-buffer-number-regexp
1153                                      "..../..\(.*\)..:.. ")
1154                              nil t)
1155           (while (string-match wl-thread-indent-regexp
1156                                (char-to-string
1157                                 (char-after (point))))
1158             (setq depth (1+ depth))
1159             (forward-char)))
1160       (/ depth wl-thread-indent-level-internal))))
1161
1162 (defun wl-thread-update-indent-string-region (beg end)
1163   (interactive "r")
1164   (save-excursion
1165     (goto-char beg)
1166     (while (< (point) end)
1167       (wl-thread-update-indent-string)
1168       (forward-line 1))))
1169
1170 (defsubst wl-thread-make-indent-string (entity)
1171   (let ((cur entity)
1172         (ret-val "")
1173         (space-str (wl-repeat-string wl-thread-space-str-internal
1174                                      (- wl-thread-indent-level-internal 1)))
1175         parent)
1176     (when (wl-thread-entity-get-number
1177            (setq parent (wl-thread-entity-get-parent-entity cur)))
1178       (if (wl-thread-entity-get-younger-brothers cur)
1179           (setq ret-val wl-thread-have-younger-brother-str-internal)
1180         (setq ret-val wl-thread-youngest-child-str-internal))
1181       (setq ret-val (concat ret-val
1182                             (wl-repeat-string
1183                              wl-thread-horizontal-str-internal
1184                              (- wl-thread-indent-level-internal 1))))
1185       (setq cur parent)
1186       (while (wl-thread-entity-get-number
1187               (wl-thread-entity-get-parent-entity cur))
1188         (if (wl-thread-entity-get-younger-brothers cur)
1189             (setq ret-val (concat wl-thread-vertical-str-internal
1190                                   space-str
1191                                   ret-val))
1192           (setq ret-val (concat wl-thread-space-str-internal
1193                                 space-str
1194                                 ret-val)))
1195         (setq cur (wl-thread-entity-get-parent-entity cur))))
1196     ret-val))
1197
1198 (defun wl-thread-update-indent-string ()
1199   "Update indent string of current line."
1200   (interactive)
1201   (save-excursion
1202     (beginning-of-line)
1203     (let ((inhibit-read-only t)
1204           (buffer-read-only nil)
1205           thr-str)
1206       (when (looking-at (concat "^ *\\([0-9]+\\)"
1207                                 "..../..\(.*\)..:.. \\("
1208                                 wl-highlight-thread-indent-string-regexp
1209                                 "\\)[[<]"))
1210         (goto-char (match-beginning 2))
1211         (delete-region (match-beginning 2)
1212                        (match-end 2))
1213         (setq thr-str
1214               (wl-thread-make-indent-string
1215                (wl-thread-get-entity (string-to-int (wl-match-buffer 1)))))
1216         (if (and wl-summary-width
1217                  wl-summary-indent-length-limit
1218                  (< wl-summary-indent-length-limit
1219                     (string-width thr-str)))
1220             (setq thr-str (wl-set-string-width
1221                            wl-summary-indent-length-limit
1222                            thr-str)))
1223         (insert thr-str)
1224         (if wl-summary-highlight
1225             (wl-highlight-summary-current-line))))))
1226
1227 (defun wl-thread-set-parent (&optional parent-number)
1228   "Set current message's parent interactively."
1229   (interactive)
1230   (let ((number (wl-summary-message-number))
1231         (dst-parent (if (interactive-p)
1232                         (read-from-minibuffer "Parent Message (No.): ")))
1233         entity dst-parent-entity src-parent children
1234         update-msgs
1235         buffer-read-only)
1236     (if (string= dst-parent "")
1237         (setq dst-parent nil)
1238       (if (interactive-p)
1239           (setq dst-parent (string-to-int dst-parent))
1240         (setq dst-parent parent-number)))
1241     (if (and dst-parent
1242              (memq dst-parent (wl-thread-get-children-msgs number)))
1243         (error "Parent is children or myself"))
1244     (setq entity (wl-thread-get-entity number))
1245     (when (and number entity)
1246       ;; delete thread
1247       (setq update-msgs (wl-thread-delete-message number 'deep))
1248       ;; insert as child at new parent
1249       (setq dst-parent-entity (wl-thread-get-entity dst-parent))
1250       (if dst-parent-entity
1251           (progn
1252             (if (setq children
1253                       (wl-thread-entity-get-children dst-parent-entity))
1254                 (wl-append update-msgs
1255                            (wl-thread-get-children-msgs
1256                             (car (last children)) t)))
1257             (wl-thread-entity-set-children
1258              dst-parent-entity
1259              (append children (list number)))
1260             (wl-thread-entity-set-linked entity t))
1261         ;; insert as top
1262         (wl-append wl-thread-entity-list (list number))
1263         (wl-thread-entity-set-linked entity nil))
1264
1265       ;; update my thread
1266       (wl-append update-msgs (wl-thread-get-children-msgs number t))
1267       (setq update-msgs (elmo-uniq-list update-msgs))
1268       (wl-thread-entity-set-parent entity dst-parent)
1269       ;; update thread on buffer
1270       (wl-thread-update-line-msgs update-msgs t))))
1271
1272 (require 'product)
1273 (product-provide (provide 'wl-thread) (require 'wl-version))
1274
1275 ;;; wl-thread.el ends here