lisp/gnus/nnfolder.el

   1 ;;; nnfolder.el --- mail folder access for Gnus
   2 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
   3 ;;        Free Software Foundation, Inc.
   4
   5 ;; Author: Simon Josefsson <simon@josefsson.org> (adding MARKS)
   6 ;;      ShengHuo Zhu <zsh@cs.rochester.edu> (adding NOV)
   7 ;;      Scott Byer <byer@mv.us.adobe.com>
   8 ;;      Lars Magne Ingebrigtsen <larsi@gnus.org>
   9 ;;      Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
  10 ;; Keywords: mail
  11
  12 ;; This file is part of GNU Emacs.
  13
  14 ;; GNU Emacs is free software; you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation; either version 2, or (at your option)
  17 ;; any later version.
  18
  19 ;; GNU Emacs is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  26 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  27 ;; Boston, MA 02110-1301, USA.
  28
  29 ;;; Commentary:
  30
  31 ;;; Code:
  32
  33 (require 'nnheader)
  34 (require 'message)
  35 (require 'nnmail)
  36 (require 'nnoo)
  37 (eval-when-compile (require 'cl))
  38 (require 'gnus)
  39 (require 'gnus-util)
  40 (require 'gnus-range)
  41
  42 (eval-and-compile
  43   (autoload 'gnus-article-unpropagatable-p "gnus-sum")
  44   (autoload 'gnus-intersection "gnus-range"))
  45
  46 (nnoo-declare nnfolder)
  47
  48 (defvoo nnfolder-directory (expand-file-name message-directory)
  49   "The name of the nnfolder directory.")
  50
  51 (defvoo nnfolder-nov-directory nil
  52   "The name of the nnfolder NOV directory.
  53 If nil, `nnfolder-directory' is used.")
  54
  55 (defvoo nnfolder-marks-directory nil
  56   "The name of the nnfolder MARKS directory.
  57 If nil, `nnfolder-directory' is used.")
  58
  59 (defvoo nnfolder-active-file
  60     (nnheader-concat nnfolder-directory "active")
  61   "The name of the active file.")
  62
  63 ;; I renamed this variable to something more in keeping with the general GNU
  64 ;; style. -SLB
  65
  66 (defvoo nnfolder-ignore-active-file nil
  67   "If non-nil, the active file is ignored.
  68 This causes nnfolder to do some extra work in order to determine the
  69 true active ranges of an mbox file.  Note that the active file is
  70 still saved, but its values are not used.  This costs some extra time
  71 when scanning an mbox when opening it.")
  72
  73 (defvoo nnfolder-distrust-mbox nil
  74   "If non-nil, the folder will be distrusted.
  75 This means that nnfolder will not trust the user with respect to
  76 inserting unaccounted for mail in the middle of an mbox file.  This
  77 can greatly slow down scans, which now must scan the entire file for
  78 unmarked messages.  When nil, scans occur forward from the last marked
  79 message, a huge time saver for large mailboxes.")
  80
  81 (defvoo nnfolder-newsgroups-file
  82     (concat (file-name-as-directory nnfolder-directory) "newsgroups")
  83   "Mail newsgroups description file.")
  84
  85 (defvoo nnfolder-get-new-mail t
  86   "If non-nil, nnfolder will check the incoming mail file and split the mail.")
  87
  88 (defvoo nnfolder-prepare-save-mail-hook nil
  89   "Hook run narrowed to an article before saving.")
  90
  91 (defvoo nnfolder-save-buffer-hook nil
  92   "Hook run before saving the nnfolder mbox buffer.")
  93
  94
  95 (defvoo nnfolder-inhibit-expiry nil
  96   "If non-nil, inhibit expiry.")
  97
  98 \f
  99
 100 (defconst nnfolder-version "nnfolder 2.0"
 101   "nnfolder version.")
 102
 103 (defconst nnfolder-article-marker "X-Gnus-Article-Number: "
 104   "String used to demarcate what the article number for a message is.")
 105
 106 (defvoo nnfolder-current-group nil)
 107 (defvoo nnfolder-current-buffer nil)
 108 (defvoo nnfolder-status-string "")
 109 (defvoo nnfolder-group-alist nil)
 110 (defvoo nnfolder-buffer-alist nil)
 111 (defvoo nnfolder-scantime-alist nil)
 112 (defvoo nnfolder-active-timestamp nil)
 113 (defvoo nnfolder-active-file-coding-system mm-text-coding-system)
 114 (defvoo nnfolder-active-file-coding-system-for-write
 115     nnmail-active-file-coding-system)
 116 (defvoo nnfolder-file-coding-system mm-text-coding-system)
 117 (defvoo nnfolder-file-coding-system-for-write nnheader-file-coding-system
 118   "Coding system for save nnfolder file.
 119 if nil, `nnfolder-file-coding-system' is used.") ; FIXME: fill-in the doc-string of this variable
 120
 121 (defvoo nnfolder-nov-is-evil nil
 122   "If non-nil, Gnus will never generate and use nov databases for mail groups.
 123 Using nov databases will speed up header fetching considerably.
 124 This variable shouldn't be flipped much.  If you have, for some reason,
 125 set this to t, and want to set it to nil again, you should always run
 126 the `nnfolder-generate-active-file' command.  The function will go
 127 through all nnfolder directories and generate nov databases for them
 128 all.  This may very well take some time.")
 129
 130 (defvoo nnfolder-nov-file-suffix ".nov")
 131
 132 (defvoo nnfolder-nov-buffer-alist nil)
 133
 134 (defvar nnfolder-nov-buffer-file-name nil)
 135
 136 (defvoo nnfolder-marks-is-evil nil
 137   "If non-nil, Gnus will never generate and use marks file for mail groups.
 138 Using marks files makes it possible to backup and restore mail groups
 139 separately from `.newsrc.eld'.  If you have, for some reason, set
 140 this to t, and want to set it to nil again, you should always remove
 141 the corresponding marks file (usually base nnfolder file name
 142 concatenated with `.mrk', but see `nnfolder-marks-file-suffix') for
 143 the group.  Then the marks file will be regenerated properly by Gnus.")
 144
 145 (defvoo nnfolder-marks nil)
 146
 147 (defvoo nnfolder-marks-file-suffix ".mrk")
 148
 149 (defvar nnfolder-marks-modtime (gnus-make-hashtable))
 150
 151 \f
 152
 153 ;;; Interface functions
 154
 155 (nnoo-define-basics nnfolder)
 156
 157 (deffoo nnfolder-retrieve-headers (articles &optional group server fetch-old)
 158   (save-excursion
 159     (set-buffer nntp-server-buffer)
 160     (erase-buffer)
 161     (let (article start stop num)
 162       (nnfolder-possibly-change-group group server)
 163       (when nnfolder-current-buffer
 164         (set-buffer nnfolder-current-buffer)
 165         (goto-char (point-min))
 166         (if (stringp (car articles))
 167             'headers
 168           (if (nnfolder-retrieve-headers-with-nov articles fetch-old)
 169               'nov
 170             (setq articles (gnus-sorted-intersection
 171                             ;; Is ARTICLES sorted?
 172                             (sort articles '<)
 173                             (nnfolder-existing-articles)))
 174             (while (setq article (pop articles))
 175               (set-buffer nnfolder-current-buffer)
 176               (cond ((nnfolder-goto-article article)
 177                      (setq start (point))
 178                      (setq stop (if (search-forward "\n\n" nil t)
 179                                     (1- (point))
 180                                   (point-max)))
 181                      (set-buffer nntp-server-buffer)
 182                      (insert (format "221 %d Article retrieved.\n" article))
 183                      (insert-buffer-substring nnfolder-current-buffer
 184                                               start stop)
 185                      (goto-char (point-max))
 186                      (insert ".\n"))
 187
 188                     ;; If we couldn't find this article, skip over ranges
 189                     ;; of missing articles so we don't search the whole file
 190                     ;; for each of them.
 191                     ((numberp article)
 192                      (setq start (point))
 193                      (and
 194                       ;; Check that we are either at BOF or after an
 195                       ;; article with a lower number.  We do this so we
 196                       ;; won't be confused by out-of-order article numbers,
 197                       ;; as caused by active file bogosity.
 198                       (cond
 199                        ((bobp))
 200                        ((search-backward (concat "\n" nnfolder-article-marker)
 201                                          nil t)
 202                         (goto-char (match-end 0))
 203                         (setq num (string-to-number
 204                                    (buffer-substring
 205                                     (point) (gnus-point-at-eol))))
 206                         (goto-char start)
 207                         (< num article)))
 208                       ;; Check that we are before an article with a
 209                       ;; higher number.
 210                       (search-forward (concat "\n" nnfolder-article-marker)
 211                                       nil t)
 212                       (progn
 213                         (setq num (string-to-number
 214                                    (buffer-substring
 215                                     (point) (gnus-point-at-eol))))
 216                         (> num article))
 217                       ;; Discard any article numbers before the one we're
 218                       ;; now looking at.
 219                       (while (and articles
 220                                   (< (car articles) num))
 221                         (setq articles (cdr articles))))
 222                      (goto-char start))))
 223             (set-buffer nntp-server-buffer)
 224             (nnheader-fold-continuation-lines)
 225             'headers))))))
 226
 227 (deffoo nnfolder-open-server (server &optional defs)
 228   (nnoo-change-server 'nnfolder server defs)
 229   (nnmail-activate 'nnfolder t)
 230   (gnus-make-directory nnfolder-directory)
 231   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 232     (and nnfolder-nov-directory
 233          (gnus-make-directory nnfolder-nov-directory)))
 234   (unless nnfolder-marks-is-evil
 235     (and nnfolder-marks-directory
 236          (gnus-make-directory nnfolder-marks-directory)))
 237   (cond
 238    ((not (file-exists-p nnfolder-directory))
 239     (nnfolder-close-server)
 240     (nnheader-report 'nnfolder "Couldn't create directory: %s"
 241                      nnfolder-directory))
 242    ((not (file-directory-p (file-truename nnfolder-directory)))
 243     (nnfolder-close-server)
 244     (nnheader-report 'nnfolder "Not a directory: %s" nnfolder-directory))
 245    (t
 246     (nnmail-activate 'nnfolder)
 247     (nnheader-report 'nnfolder "Opened server %s using directory %s"
 248                      server nnfolder-directory)
 249     t)))
 250
 251 (deffoo nnfolder-request-close ()
 252   (let ((alist nnfolder-buffer-alist))
 253     (while alist
 254       (nnfolder-close-group (caar alist) nil t)
 255       (setq alist (cdr alist))))
 256   (nnoo-close-server 'nnfolder)
 257   (setq nnfolder-buffer-alist nil
 258         nnfolder-group-alist nil))
 259
 260 (deffoo nnfolder-request-article (article &optional group server buffer)
 261   (nnfolder-possibly-change-group group server)
 262   (save-excursion
 263     (set-buffer nnfolder-current-buffer)
 264     (goto-char (point-min))
 265     (when (nnfolder-goto-article article)
 266       (let (start stop)
 267         (setq start (point))
 268         (forward-line 1)
 269         (unless (and (nnmail-search-unix-mail-delim)
 270                      (forward-line -1))
 271           (goto-char (point-max)))
 272         (setq stop (point))
 273         (let ((nntp-server-buffer (or buffer nntp-server-buffer)))
 274           (set-buffer nntp-server-buffer)
 275           (erase-buffer)
 276           (insert-buffer-substring nnfolder-current-buffer start stop)
 277           (goto-char (point-min))
 278           (while (looking-at "From ")
 279             (delete-char 5)
 280             (insert "X-From-Line: ")
 281             (forward-line 1))
 282           (if (numberp article)
 283               (cons nnfolder-current-group article)
 284             (goto-char (point-min))
 285             (cons nnfolder-current-group
 286                   (if (search-forward (concat "\n" nnfolder-article-marker)
 287                                       nil t)
 288                       (string-to-number (buffer-substring
 289                                       (point) (gnus-point-at-eol)))
 290                     -1))))))))
 291
 292 (deffoo nnfolder-request-group (group &optional server dont-check)
 293   (nnfolder-possibly-change-group group server t)
 294   (save-excursion
 295     (if (not (assoc group nnfolder-group-alist))
 296         (nnheader-report 'nnfolder "No such group: %s" group)
 297       (if dont-check
 298           (progn
 299             (nnheader-report 'nnfolder "Selected group %s" group)
 300             t)
 301         (let* ((active (assoc group nnfolder-group-alist))
 302                (group (car active))
 303                (range (cadr active)))
 304           (cond
 305            ((null active)
 306             (nnheader-report 'nnfolder "No such group: %s" group))
 307            ((null nnfolder-current-group)
 308             (nnheader-report 'nnfolder "Empty group: %s" group))
 309            (t
 310             (nnheader-report 'nnfolder "Selected group %s" group)
 311             (nnheader-insert "211 %d %d %d %s\n"
 312                              (1+ (- (cdr range) (car range)))
 313                              (car range) (cdr range) group))))))))
 314
 315 (deffoo nnfolder-request-scan (&optional group server)
 316   (nnfolder-possibly-change-group nil server)
 317   (when nnfolder-get-new-mail
 318     (nnfolder-possibly-change-group group server)
 319     (nnmail-get-new-mail
 320      'nnfolder
 321      (lambda ()
 322        (let ((bufs nnfolder-buffer-alist))
 323          (save-excursion
 324            (while bufs
 325              (if (not (gnus-buffer-live-p (nth 1 (car bufs))))
 326                  (setq nnfolder-buffer-alist
 327                        (delq (car bufs) nnfolder-buffer-alist))
 328                (set-buffer (nth 1 (car bufs)))
 329                (nnfolder-save-buffer)
 330                (kill-buffer (current-buffer)))
 331              (setq bufs (cdr bufs))))))
 332      nnfolder-directory
 333      group)))
 334
 335 ;; Don't close the buffer if we're not shutting down the server.  This way,
 336 ;; we can keep the buffer in the group buffer cache, and not have to grovel
 337 ;; over the buffer again unless we add new mail to it or modify it in some
 338 ;; way.
 339
 340 (deffoo nnfolder-close-group (group &optional server force)
 341   ;; Make sure we _had_ the group open.
 342   (when (or (assoc group nnfolder-buffer-alist)
 343             (equal group nnfolder-current-group))
 344     (let ((inf (assoc group nnfolder-buffer-alist)))
 345       (when inf
 346         (when (and nnfolder-current-group
 347                    nnfolder-current-buffer)
 348           (push (list nnfolder-current-group nnfolder-current-buffer)
 349                 nnfolder-buffer-alist))
 350         (setq nnfolder-buffer-alist
 351               (delq inf nnfolder-buffer-alist))
 352         (setq nnfolder-current-buffer (cadr inf)
 353               nnfolder-current-group (car inf))))
 354     (when (and nnfolder-current-buffer
 355                (buffer-name nnfolder-current-buffer))
 356       (save-excursion
 357         (set-buffer nnfolder-current-buffer)
 358         ;; If the buffer was modified, write the file out now.
 359         (nnfolder-save-buffer)
 360         ;; If we're shutting the server down, we need to kill the
 361         ;; buffer and remove it from the open buffer list.  Or, of
 362         ;; course, if we're trying to minimize our space impact.
 363         (kill-buffer (current-buffer))
 364         (setq nnfolder-buffer-alist (delq (assoc group nnfolder-buffer-alist)
 365                                           nnfolder-buffer-alist)))))
 366   (setq nnfolder-current-group nil
 367         nnfolder-current-buffer nil)
 368   t)
 369
 370 (deffoo nnfolder-request-create-group (group &optional server args)
 371   (nnfolder-possibly-change-group nil server)
 372   (nnmail-activate 'nnfolder)
 373   (when (and group
 374              (not (assoc group nnfolder-group-alist)))
 375     (push (list group (cons 1 0)) nnfolder-group-alist)
 376     (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 377     (save-current-buffer
 378       (nnfolder-read-folder group)))
 379   t)
 380
 381 (deffoo nnfolder-request-list (&optional server)
 382   (nnfolder-possibly-change-group nil server)
 383   (save-excursion
 384     (let ((nnmail-file-coding-system nnfolder-active-file-coding-system))
 385       (nnmail-find-file nnfolder-active-file)
 386       (setq nnfolder-group-alist (nnmail-get-active)))
 387     t))
 388
 389 (deffoo nnfolder-request-newgroups (date &optional server)
 390   (nnfolder-possibly-change-group nil server)
 391   (nnfolder-request-list server))
 392
 393 (deffoo nnfolder-request-list-newsgroups (&optional server)
 394   (nnfolder-possibly-change-group nil server)
 395   (save-excursion
 396     (let ((nnmail-file-coding-system nnfolder-file-coding-system))
 397       (nnmail-find-file nnfolder-newsgroups-file))))
 398
 399 ;; Return a list consisting of all article numbers existing in the
 400 ;; current folder.
 401
 402 (defun nnfolder-existing-articles ()
 403   (save-excursion
 404     (when nnfolder-current-buffer
 405       (set-buffer nnfolder-current-buffer)
 406       (goto-char (point-min))
 407       (let ((marker (concat "\n" nnfolder-article-marker))
 408             (number "[0-9]+")
 409             numbers)
 410         (while (and (search-forward marker nil t)
 411                     (re-search-forward number nil t))
 412           (let ((newnum (string-to-number (match-string 0))))
 413             (if (nnmail-within-headers-p)
 414                 (push newnum numbers))))
 415       ;; The article numbers are increasing, so this result is sorted.
 416         (nreverse numbers)))))
 417
 418 (deffoo nnfolder-request-expire-articles
 419     (articles newsgroup &optional server force)
 420   (nnfolder-possibly-change-group newsgroup server)
 421   (let* ((is-old t)
 422          ;; The articles we have deleted so far.
 423          (deleted-articles nil)
 424          ;; The articles that really exist and will
 425          ;; be expired if they are old enough.
 426          (maybe-expirable
 427           (gnus-sorted-intersection articles (nnfolder-existing-articles))))
 428     (nnmail-activate 'nnfolder)
 429
 430     (save-excursion
 431       (set-buffer nnfolder-current-buffer)
 432       ;; Since messages are sorted in arrival order and expired in the
 433       ;; same order, we can stop as soon as we find a message that is
 434       ;; too old.
 435       (while (and maybe-expirable is-old)
 436         (goto-char (point-min))
 437         (when (and (nnfolder-goto-article (car maybe-expirable))
 438                    (search-forward (concat "\n" nnfolder-article-marker)
 439                                    nil t))
 440           (forward-sexp)
 441           (when (setq is-old
 442                       (nnmail-expired-article-p
 443                        newsgroup
 444                        (buffer-substring
 445                         (point) (progn (end-of-line) (point)))
 446                        force nnfolder-inhibit-expiry))
 447             (unless (eq nnmail-expiry-target 'delete)
 448               (with-temp-buffer
 449                 (nnfolder-request-article (car maybe-expirable)
 450                                           newsgroup server (current-buffer))
 451                 (let ((nnfolder-current-directory nil))
 452                   (nnmail-expiry-target-group
 453                    nnmail-expiry-target newsgroup)))
 454               (nnfolder-possibly-change-group newsgroup server))
 455             (nnheader-message 5 "Deleting article %d in %s..."
 456                               (car maybe-expirable) newsgroup)
 457             (nnfolder-delete-mail)
 458             (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 459               (nnfolder-nov-delete-article newsgroup (car maybe-expirable)))
 460             ;; Must remember which articles were actually deleted
 461             (push (car maybe-expirable) deleted-articles)))
 462         (setq maybe-expirable (cdr maybe-expirable)))
 463       (unless nnfolder-inhibit-expiry
 464         (nnheader-message 5 "Deleting articles...done"))
 465       (nnfolder-save-buffer)
 466       (nnfolder-adjust-min-active newsgroup)
 467       (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 468       (gnus-sorted-difference articles (nreverse deleted-articles)))))
 469
 470 (deffoo nnfolder-request-move-article (article group server
 471                                                accept-form &optional last)
 472   (save-excursion
 473     (let ((buf (get-buffer-create " *nnfolder move*"))
 474           result)
 475       (and
 476        (nnfolder-request-article article group server)
 477        (save-excursion
 478          (set-buffer buf)
 479          (erase-buffer)
 480          (insert-buffer-substring nntp-server-buffer)
 481          (goto-char (point-min))
 482          (while (re-search-forward
 483                  (concat "^" nnfolder-article-marker)
 484                  (save-excursion (and (search-forward "\n\n" nil t) (point)))
 485                  t)
 486            (gnus-delete-line))
 487          (setq result (eval accept-form))
 488          (kill-buffer buf)
 489          result)
 490        (save-excursion
 491          (nnfolder-possibly-change-group group server)
 492          (set-buffer nnfolder-current-buffer)
 493          (goto-char (point-min))
 494          (when (nnfolder-goto-article article)
 495            (nnfolder-delete-mail))
 496          (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 497            (nnfolder-nov-delete-article group article))
 498          (when last
 499            (nnfolder-save-buffer)
 500            (nnfolder-adjust-min-active group)
 501            (nnfolder-save-active nnfolder-group-alist nnfolder-active-file))))
 502       result)))
 503
 504 (deffoo nnfolder-request-accept-article (group &optional server last)
 505   (save-excursion
 506     (nnfolder-possibly-change-group group server)
 507     (nnmail-check-syntax)
 508     (let ((buf (current-buffer))
 509           result art-group)
 510       (goto-char (point-min))
 511       (when (looking-at "X-From-Line: ")
 512         (replace-match "From ")
 513         (while (progn (forward-line) (looking-at "[ \t]"))
 514           (delete-char -1)))
 515       (with-temp-buffer
 516         (let ((nnmail-file-coding-system nnfolder-active-file-coding-system)
 517               (nntp-server-buffer (current-buffer)))
 518           (nnmail-find-file nnfolder-active-file)
 519           (setq nnfolder-group-alist (nnmail-parse-active))))
 520       (save-excursion
 521         (goto-char (point-min))
 522         (if (search-forward "\n\n" nil t)
 523             (forward-line -1)
 524           (goto-char (point-max)))
 525         (while (re-search-backward (concat "^" nnfolder-article-marker) nil t)
 526           (delete-region (point) (progn (forward-line 1) (point))))
 527         (when nnmail-cache-accepted-message-ids
 528           (nnmail-cache-insert (nnmail-fetch-field "message-id")
 529                                group
 530                                (nnmail-fetch-field "subject")
 531                                (nnmail-fetch-field "from")))
 532         (setq result (if (stringp group)
 533                          (list (cons group (nnfolder-active-number group)))
 534                        (setq art-group
 535                              (nnmail-article-group 'nnfolder-active-number))))
 536         (if (and (null result)
 537                  (yes-or-no-p "Moved to `junk' group; delete article? "))
 538             (setq result 'junk)
 539           (setq result
 540                 (car (nnfolder-save-mail result)))))
 541       (when last
 542         (save-excursion
 543           (nnfolder-possibly-change-folder (or (caar art-group) group))
 544           (nnfolder-save-buffer)
 545           (when nnmail-cache-accepted-message-ids
 546             (nnmail-cache-close))))
 547       (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 548       (unless result
 549         (nnheader-report 'nnfolder "Couldn't store article"))
 550       result)))
 551
 552 (deffoo nnfolder-request-replace-article (article group buffer)
 553   (nnfolder-possibly-change-group group)
 554   (save-excursion
 555     (set-buffer buffer)
 556     (goto-char (point-min))
 557     (if (not (looking-at "X-From-Line: "))
 558         (insert "From nobody " (current-time-string) "\n")
 559       (replace-match "From ")
 560       (forward-line 1)
 561       (while (looking-at "[ \t]")
 562         (delete-char -1)
 563         (forward-line 1)))
 564     (nnfolder-normalize-buffer)
 565     (set-buffer nnfolder-current-buffer)
 566     (goto-char (point-min))
 567     (if (not (nnfolder-goto-article article))
 568         nil
 569       (nnfolder-delete-mail)
 570       (insert-buffer-substring buffer)
 571       (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 572         (save-excursion
 573           (set-buffer buffer)
 574           (let ((headers (nnfolder-parse-head article
 575                                               (point-min) (point-max))))
 576             (with-current-buffer (nnfolder-open-nov group)
 577               (if (nnheader-find-nov-line article)
 578                   (delete-region (point) (progn (forward-line 1) (point))))
 579               (nnheader-insert-nov headers)))))
 580       (nnfolder-save-buffer)
 581       t)))
 582
 583 (deffoo nnfolder-request-delete-group (group &optional force server)
 584   (nnfolder-close-group group server t)
 585   ;; Delete all articles in GROUP.
 586   (if (not force)
 587       ()                                ; Don't delete the articles.
 588     ;; Delete the file that holds the group.
 589     (let ((data (nnfolder-group-pathname group))
 590           (nov (nnfolder-group-nov-pathname group))
 591           (mrk (nnfolder-group-marks-pathname group)))
 592       (ignore-errors (delete-file data))
 593       (ignore-errors (delete-file nov))
 594       (ignore-errors (delete-file mrk))))
 595   ;; Remove the group from all structures.
 596   (setq nnfolder-group-alist
 597         (delq (assoc group nnfolder-group-alist) nnfolder-group-alist)
 598         nnfolder-current-group nil
 599         nnfolder-current-buffer nil)
 600   ;; Save the active file.
 601   (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 602   t)
 603
 604 (deffoo nnfolder-request-rename-group (group new-name &optional server)
 605   (nnfolder-possibly-change-group group server)
 606   (save-excursion
 607     (set-buffer nnfolder-current-buffer)
 608     (and (file-writable-p buffer-file-name)
 609          (ignore-errors
 610            (let ((new-file (nnfolder-group-pathname new-name)))
 611              (gnus-make-directory (file-name-directory new-file))
 612              (rename-file buffer-file-name new-file)
 613              (when (file-exists-p (nnfolder-group-nov-pathname group))
 614                (setq new-file (nnfolder-group-nov-pathname new-name))
 615                (gnus-make-directory (file-name-directory new-file))
 616                (rename-file (nnfolder-group-nov-pathname group) new-file))
 617              (when (file-exists-p (nnfolder-group-marks-pathname group))
 618                (setq new-file (nnfolder-group-marks-pathname new-name))
 619                (gnus-make-directory (file-name-directory new-file))
 620                (rename-file (nnfolder-group-marks-pathname group) new-file)))
 621            t)
 622          ;; That went ok, so we change the internal structures.
 623          (let ((entry (assoc group nnfolder-group-alist)))
 624            (and entry (setcar entry new-name))
 625            (setq nnfolder-current-buffer nil
 626                  nnfolder-current-group nil)
 627            ;; Save the new group alist.
 628            (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 629            ;; We kill the buffer instead of renaming it and stuff.
 630            (kill-buffer (current-buffer))
 631            t))))
 632
 633 (deffoo nnfolder-request-regenerate (server)
 634   (nnfolder-possibly-change-group nil server)
 635   (nnfolder-generate-active-file)
 636   t)
 637
 638 \f
 639 ;;; Internal functions.
 640
 641 (defun nnfolder-adjust-min-active (group)
 642   ;; Find the lowest active article in this group.
 643   (let* ((active (cadr (assoc group nnfolder-group-alist)))
 644          (marker (concat "\n" nnfolder-article-marker))
 645          (number "[0-9]+")
 646          (activemin (cdr active)))
 647     (save-excursion
 648       (set-buffer nnfolder-current-buffer)
 649       (goto-char (point-min))
 650       (while (and (search-forward marker nil t)
 651                   (re-search-forward number nil t))
 652         (let ((newnum (string-to-number (match-string 0))))
 653           (if (nnmail-within-headers-p)
 654               (setq activemin (min activemin newnum)))))
 655       (setcar active activemin))))
 656
 657 (defun nnfolder-article-string (article)
 658   (if (numberp article)
 659       (concat "\n" nnfolder-article-marker (int-to-string article) " ")
 660     (concat "\nMessage-ID: " article)))
 661
 662 (defun nnfolder-goto-article (article)
 663   "Place point at the start of the headers of ARTICLE.
 664 ARTICLE can be an article number or a Message-ID.
 665 Returns t if successful, nil otherwise."
 666   (let ((art-string (nnfolder-article-string article))
 667         start found)
 668     ;; It is likely that we are at or before the delimiter line.
 669     ;; We therefore go to the end of the previous line, and start
 670     ;; searching from there.
 671     (beginning-of-line)
 672     (unless (bobp)
 673       (forward-char -1))
 674     (setq start (point))
 675     ;; First search forward.
 676     (while (and (setq found (search-forward art-string nil t))
 677                 (not (nnmail-within-headers-p))))
 678     ;; If unsuccessful, search backward from where we started,
 679     (unless found
 680       (goto-char start)
 681       (while (and (setq found (search-backward art-string nil t))
 682                   (not (nnmail-within-headers-p)))))
 683     (when found
 684       (nnmail-search-unix-mail-delim-backward))))
 685
 686 (defun nnfolder-delete-mail (&optional leave-delim)
 687   "Delete the message that point is in.
 688 If optional argument LEAVE-DELIM is t, then mailbox delimiter is not
 689 deleted.  Point is left where the deleted region was."
 690   (save-restriction
 691     (narrow-to-region
 692      (save-excursion
 693        ;; In case point is at the beginning of the message already.
 694        (forward-line 1)
 695        (nnmail-search-unix-mail-delim-backward)
 696        (if leave-delim (progn (forward-line 1) (point))
 697          (point)))
 698      (progn
 699        (forward-line 1)
 700        (if (nnmail-search-unix-mail-delim)
 701            (point)
 702          (point-max))))
 703     (run-hooks 'nnfolder-delete-mail-hook)
 704     (delete-region (point-min) (point-max))))
 705
 706 (defun nnfolder-possibly-change-group (group &optional server dont-check)
 707   ;; Change servers.
 708   (when (and server
 709              (not (nnfolder-server-opened server)))
 710     (nnfolder-open-server server))
 711   (unless (gnus-buffer-live-p nnfolder-current-buffer)
 712     (setq nnfolder-current-buffer nil
 713           nnfolder-current-group nil))
 714   ;; Change group.
 715   (let ((file-name-coding-system nnmail-pathname-coding-system))
 716     (when (and group
 717                (not (equal group nnfolder-current-group))
 718                (progn
 719                  (nnmail-activate 'nnfolder)
 720                  (and (assoc group nnfolder-group-alist)
 721                       (file-exists-p (nnfolder-group-pathname group)))))
 722       (if dont-check
 723           (setq nnfolder-current-group group
 724                 nnfolder-current-buffer nil)
 725         (let (inf file)
 726           ;; If we have to change groups, see if we don't already have
 727           ;; the folder in memory.  If we do, verify the modtime and
 728           ;; destroy the folder if needed so we can rescan it.
 729           (setq nnfolder-current-buffer
 730                 (nth 1 (assoc group nnfolder-buffer-alist)))
 731
 732           ;; If the buffer is not live, make sure it isn't in the
 733           ;; alist.  If it is live, verify that nobody else has
 734           ;; touched the file since last time.
 735           (when (and nnfolder-current-buffer
 736                      (not (gnus-buffer-live-p nnfolder-current-buffer)))
 737             (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)
 738                   nnfolder-current-buffer nil))
 739
 740           (setq nnfolder-current-group group)
 741
 742           (when (or (not nnfolder-current-buffer)
 743                     (not (verify-visited-file-modtime
 744                           nnfolder-current-buffer)))
 745             (save-excursion
 746               (setq file (nnfolder-group-pathname group))
 747               ;; See whether we need to create the new file.
 748               (unless (file-exists-p file)
 749                 (gnus-make-directory (file-name-directory file))
 750                 (let ((nnmail-file-coding-system
 751                        (or nnfolder-file-coding-system-for-write
 752                            nnfolder-file-coding-system-for-write)))
 753                   (nnmail-write-region (point-min) (point-min)
 754                                        file t 'nomesg)))
 755               (when (setq nnfolder-current-buffer (nnfolder-read-folder group))
 756                 (set-buffer nnfolder-current-buffer)
 757                 (push (list group nnfolder-current-buffer)
 758                       nnfolder-buffer-alist)))))))))
 759
 760 (defun nnfolder-save-mail (group-art-list)
 761   "Called narrowed to an article."
 762   (let* (save-list group-art)
 763     (goto-char (point-min))
 764     ;; The From line may have been quoted by movemail.
 765     (when (looking-at ">From")
 766       (delete-char 1))
 767     ;; This might come from somewhere else.
 768     (unless (looking-at "From ")
 769       (insert "From nobody " (current-time-string) "\n")
 770       (goto-char (point-min)))
 771     ;; Quote all "From " lines in the article.
 772     (forward-line 1)
 773     (let (case-fold-search)
 774       (while (re-search-forward "^From " nil t)
 775         (beginning-of-line)
 776         (insert "> ")))
 777     (setq save-list group-art-list)
 778     (nnmail-insert-lines)
 779     (nnmail-insert-xref group-art-list)
 780     (run-hooks 'nnmail-prepare-save-mail-hook)
 781     (run-hooks 'nnfolder-prepare-save-mail-hook)
 782
 783     ;; Insert the mail into each of the destination groups.
 784     (while (setq group-art (pop group-art-list))
 785       ;; Kill any previous newsgroup markers.
 786       (goto-char (point-min))
 787       (if (search-forward "\n\n" nil t)
 788           (forward-line -1)
 789         (goto-char (point-max)))
 790       (while (search-backward (concat "\n" nnfolder-article-marker) nil t)
 791         (delete-region (1+ (point)) (progn (forward-line 2) (point))))
 792
 793       ;; Insert the new newsgroup marker.
 794       (nnfolder-insert-newsgroup-line group-art)
 795
 796       (save-excursion
 797         (let ((beg (point-min))
 798               (end (point-max))
 799               (obuf (current-buffer)))
 800           (nnfolder-possibly-change-folder (car group-art))
 801           (let ((buffer-read-only nil))
 802             (nnfolder-normalize-buffer)
 803             (insert-buffer-substring obuf beg end))
 804           (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 805             (set-buffer obuf)
 806             (nnfolder-add-nov (car group-art) (cdr group-art)
 807                               (nnfolder-parse-head nil beg end))))))
 808
 809     ;; Did we save it anywhere?
 810     save-list))
 811
 812 (defun nnfolder-normalize-buffer ()
 813   "Make sure there are two newlines at the end of the buffer."
 814   (goto-char (point-max))
 815   (skip-chars-backward "\n")
 816   (delete-region (point) (point-max))
 817   (unless (bobp)
 818     (insert "\n\n")))
 819
 820 (defun nnfolder-insert-newsgroup-line (group-art)
 821   (save-excursion
 822     (goto-char (point-min))
 823     (unless (search-forward "\n\n" nil t)
 824       (goto-char (point-max))
 825       (insert "\n"))
 826     (forward-char -1)
 827     (insert (format (concat nnfolder-article-marker "%d   %s\n")
 828                     (cdr group-art) (current-time-string)))))
 829
 830 (defun nnfolder-active-number (group)
 831   ;; Find the next article number in GROUP.
 832   (let ((active (cadr (assoc group nnfolder-group-alist))))
 833     (if active
 834         (setcdr active (1+ (cdr active)))
 835       ;; This group is new, so we create a new entry for it.
 836       ;; This might be a bit naughty... creating groups on the drop of
 837       ;; a hat, but I don't know...
 838       (push (list group (setq active (cons 1 1)))
 839             nnfolder-group-alist))
 840     (cdr active)))
 841
 842 (defun nnfolder-possibly-change-folder (group)
 843   (let ((inf (assoc group nnfolder-buffer-alist)))
 844     (if (and inf
 845              (gnus-buffer-live-p (cadr inf)))
 846         (set-buffer (cadr inf))
 847       (when inf
 848         (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)))
 849       (when nnfolder-group-alist
 850         (nnfolder-save-active nnfolder-group-alist nnfolder-active-file))
 851       (push (list group (nnfolder-read-folder group))
 852             nnfolder-buffer-alist))))
 853
 854 ;; This method has a problem if you've accidentally let the active
 855 ;; list get out of sync with the files.  This could happen, say, if
 856 ;; you've accidentally gotten new mail with something other than Gnus
 857 ;; (but why would _that_ ever happen? :-).  In that case, we will be
 858 ;; in the middle of processing the file, ready to add new X-Gnus
 859 ;; article number markers, and we'll run across a message with no ID
 860 ;; yet - the active list _may_not_ be ready for us yet.
 861
 862 ;; To handle this, I'm modifying this routine to maintain the maximum
 863 ;; ID seen so far, and when we hit a message with no ID, we will
 864 ;; _manually_ scan the rest of the message looking for any more,
 865 ;; possibly higher IDs.  We'll assume the maximum that we find is the
 866 ;; highest active.  Note that this shouldn't cost us much extra time
 867 ;; at all, but will be a lot less vulnerable to glitches between the
 868 ;; mbox and the active file.
 869
 870 (defun nnfolder-read-folder (group)
 871   (let* ((file (nnfolder-group-pathname group))
 872          (nov  (nnfolder-group-nov-pathname group))
 873          (buffer (set-buffer
 874                   (let ((nnheader-file-coding-system
 875                          nnfolder-file-coding-system))
 876                     (nnheader-find-file-noselect file t)))))
 877     (mm-enable-multibyte) ;; Use multibyte buffer for future copying.
 878     (buffer-disable-undo)
 879     (if (equal (cadr (assoc group nnfolder-scantime-alist))
 880                (nth 5 (file-attributes file)))
 881         ;; This looks up-to-date, so we don't do any scanning.
 882         (if (file-exists-p file)
 883             buffer
 884           (push (list group buffer) nnfolder-buffer-alist)
 885           (set-buffer-modified-p t)
 886           (nnfolder-save-buffer))
 887       ;; Parse the damn thing.
 888       (save-excursion
 889         (goto-char (point-min))
 890         ;; Remove any blank lines at the start.
 891         (while (eq (following-char) ?\n)
 892           (delete-char 1))
 893         (nnmail-activate 'nnfolder)
 894         ;; Read in the file.
 895         (let ((delim "^From ")
 896               (marker (concat "\n" nnfolder-article-marker))
 897               (number "[0-9]+")
 898               (active (or (cadr (assoc group nnfolder-group-alist))
 899                           (cons 1 0)))
 900               (scantime (assoc group nnfolder-scantime-alist))
 901               (minid (lsh -1 -1))
 902               maxid start end newscantime
 903               novbuf articles newnum
 904               buffer-read-only)
 905           (setq maxid (cdr active))
 906
 907           (unless (or gnus-nov-is-evil nnfolder-nov-is-evil
 908                       (and (file-exists-p nov)
 909                            (file-newer-than-file-p nov file)))
 910             (unless (file-exists-p nov)
 911               (gnus-make-directory (file-name-directory nov)))
 912             (with-current-buffer
 913                 (setq novbuf (nnfolder-open-nov group))
 914               (goto-char (point-min))
 915               (while (not (eobp))
 916                 (push (read novbuf) articles)
 917                 (forward-line 1))
 918               (setq articles (nreverse articles))))
 919           (goto-char (point-min))
 920
 921           ;; Anytime the active number is 1 or 0, it is suspect.  In
 922           ;; that case, search the file manually to find the active
 923           ;; number.  Or, of course, if we're being paranoid.  (This
 924           ;; would also be the place to build other lists from the
 925           ;; header markers, such as expunge lists, etc., if we ever
 926           ;; desired to abandon the active file entirely for mboxes.)
 927           (when (or nnfolder-ignore-active-file
 928                     novbuf
 929                     (< maxid 2))
 930             (while (and (search-forward marker nil t)
 931                         (looking-at number))
 932               (setq newnum (string-to-number (match-string 0)))
 933               (when (nnmail-within-headers-p)
 934                 (setq maxid (max maxid newnum)
 935                       minid (min minid newnum))
 936                 (when novbuf
 937                   (if (memq newnum articles)
 938                       (setq articles (delq newnum articles))
 939                     (let ((headers (nnfolder-parse-head newnum)))
 940                       (with-current-buffer novbuf
 941                         (nnheader-find-nov-line newnum)
 942                         (nnheader-insert-nov headers)))))))
 943             (when (and novbuf articles)
 944               (with-current-buffer novbuf
 945                 (dolist (article articles)
 946                   (when (nnheader-find-nov-line article)
 947                     (delete-region (point)
 948                                    (progn (forward-line 1) (point)))))))
 949             (setcar active (max 1 (min minid maxid)))
 950             (setcdr active (max maxid (cdr active)))
 951             (goto-char (point-min)))
 952
 953           ;; As long as we trust that the user will only insert
 954           ;; unmarked mail at the end, go to the end and search
 955           ;; backwards for the last marker.  Find the start of that
 956           ;; message, and begin to search for unmarked messages from
 957           ;; there.
 958           (when (not (or nnfolder-distrust-mbox
 959                          (< maxid 2)))
 960             (goto-char (point-max))
 961             (unless (re-search-backward marker nil t)
 962               (goto-char (point-min)))
 963             ;;(when (nnmail-search-unix-mail-delim)
 964             ;;  (goto-char (point-min)))
 965             )
 966
 967           ;; Keep track of the active number on our own, and insert it
 968           ;; back into the active list when we're done.  Also, prime
 969           ;; the pump to cut down on the number of searches we do.
 970           (unless (nnmail-search-unix-mail-delim)
 971             (goto-char (point-max)))
 972           (setq end (point-marker))
 973           (while (not (= end (point-max)))
 974             (setq start (marker-position end))
 975             (goto-char end)
 976            ;; There may be more than one "From " line, so we skip past
 977             ;; them.
 978             (while (looking-at delim)
 979               (forward-line 1))
 980             (set-marker end (if (nnmail-search-unix-mail-delim)
 981                                 (point)
 982                               (point-max)))
 983             (goto-char start)
 984             (when (not (search-forward marker end t))
 985               (narrow-to-region start end)
 986               (nnmail-insert-lines)
 987               (nnfolder-insert-newsgroup-line
 988                (cons nil
 989                      (setq newnum
 990                            (nnfolder-active-number group))))
 991               (when novbuf
 992                 (let ((headers (nnfolder-parse-head newnum (point-min)
 993                                                     (point-max))))
 994                   (with-current-buffer novbuf
 995                     (goto-char (point-max))
 996                     (nnheader-insert-nov headers))))
 997               (widen)))
 998
 999           (set-marker end nil)
1000           ;; Make absolutely sure that the active list reflects
1001           ;; reality!
1002           (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
1003
1004           ;; Set the scantime for this group.
1005           (setq newscantime (visited-file-modtime))
1006           (if scantime
1007               (setcdr scantime (list newscantime))
1008             (push (list group newscantime)
1009                   nnfolder-scantime-alist))
1010           ;; Save nov.
1011           (when novbuf
1012             (nnfolder-save-nov))
1013           (current-buffer))))))
1014
1015 ;;;###autoload
1016 (defun nnfolder-generate-active-file ()
1017   "Look for mbox folders in the nnfolder directory and make them into groups.
1018 This command does not work if you use short group names."
1019   (interactive)
1020   (nnmail-activate 'nnfolder)
1021   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1022     (dolist (file (directory-files (or nnfolder-nov-directory
1023                                        nnfolder-directory)
1024                                    t
1025                                    (concat
1026                                     (regexp-quote nnfolder-nov-file-suffix)
1027                                     "$")))
1028       (when (not (message-mail-file-mbox-p file))
1029         (ignore-errors
1030           (delete-file file)))))
1031   (let ((files (directory-files nnfolder-directory))
1032         file)
1033     (while (setq file (pop files))
1034       (when (and (not (backup-file-name-p file))
1035                  (message-mail-file-mbox-p
1036                   (nnheader-concat nnfolder-directory file)))
1037         (let ((oldgroup (assoc file nnfolder-group-alist)))
1038           (if oldgroup
1039               (nnheader-message 5 "Refreshing group %s..." file)
1040             (nnheader-message 5 "Adding group %s..." file))
1041           (if oldgroup
1042               (setq nnfolder-group-alist
1043                     (delq oldgroup (copy-sequence nnfolder-group-alist))))
1044           (push (list file (cons 1 0)) nnfolder-group-alist)
1045           (nnfolder-possibly-change-folder file)
1046           (nnfolder-possibly-change-group file)
1047           (nnfolder-close-group file))))
1048     (nnheader-message 5 "")))
1049
1050 (defun nnfolder-group-pathname (group)
1051   "Make file name for GROUP."
1052   (setq group
1053         (mm-encode-coding-string group nnmail-pathname-coding-system))
1054   (let ((dir (file-name-as-directory (expand-file-name nnfolder-directory))))
1055     ;; If this file exists, we use it directly.
1056     (if (or nnmail-use-long-file-names
1057             (file-exists-p (concat dir group)))
1058         (concat dir group)
1059       ;; If not, we translate dots into slashes.
1060       (concat dir (nnheader-replace-chars-in-string group ?. ?/)))))
1061
1062 (defun nnfolder-group-nov-pathname (group)
1063   "Make pathname for GROUP NOV."
1064   (let ((nnfolder-directory
1065          (or nnfolder-nov-directory nnfolder-directory)))
1066     (concat (nnfolder-group-pathname group) nnfolder-nov-file-suffix)))
1067
1068 (defun nnfolder-save-buffer ()
1069   "Save the buffer."
1070   (when (buffer-modified-p)
1071     (run-hooks 'nnfolder-save-buffer-hook)
1072     (gnus-make-directory (file-name-directory (buffer-file-name)))
1073     (let ((coding-system-for-write
1074            (or nnfolder-file-coding-system-for-write
1075                nnfolder-file-coding-system)))
1076       (save-buffer)))
1077   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1078     (nnfolder-save-nov)))
1079
1080 (defun nnfolder-save-active (group-alist active-file)
1081   (let ((nnmail-active-file-coding-system
1082          (or nnfolder-active-file-coding-system-for-write
1083              nnfolder-active-file-coding-system)))
1084     (nnmail-save-active group-alist active-file)))
1085
1086 (defun nnfolder-open-nov (group)
1087   (or (cdr (assoc group nnfolder-nov-buffer-alist))
1088       (let ((buffer (get-buffer-create (format " *nnfolder overview %s*" group))))
1089         (save-excursion
1090           (set-buffer buffer)
1091           (set (make-local-variable 'nnfolder-nov-buffer-file-name)
1092                (nnfolder-group-nov-pathname group))
1093           (erase-buffer)
1094           (when (file-exists-p nnfolder-nov-buffer-file-name)
1095             (nnheader-insert-file-contents nnfolder-nov-buffer-file-name)))
1096         (push (cons group buffer) nnfolder-nov-buffer-alist)
1097         buffer)))
1098
1099 (defun nnfolder-save-nov ()
1100   (save-excursion
1101     (while nnfolder-nov-buffer-alist
1102       (when (buffer-name (cdar nnfolder-nov-buffer-alist))
1103         (set-buffer (cdar nnfolder-nov-buffer-alist))
1104         (when (buffer-modified-p)
1105           (gnus-make-directory (file-name-directory
1106                                 nnfolder-nov-buffer-file-name))
1107           (nnmail-write-region 1 (point-max) nnfolder-nov-buffer-file-name
1108                                nil 'nomesg))
1109         (set-buffer-modified-p nil)
1110         (kill-buffer (current-buffer)))
1111       (setq nnfolder-nov-buffer-alist (cdr nnfolder-nov-buffer-alist)))))
1112
1113 (defun nnfolder-nov-delete-article (group article)
1114   (save-excursion
1115     (set-buffer (nnfolder-open-nov group))
1116     (when (nnheader-find-nov-line article)
1117       (delete-region (point) (progn (forward-line 1) (point))))
1118     t))
1119
1120 (defun nnfolder-retrieve-headers-with-nov (articles &optional fetch-old)
1121   (if (or gnus-nov-is-evil nnfolder-nov-is-evil)
1122       nil
1123     (let ((nov (nnfolder-group-nov-pathname nnfolder-current-group)))
1124       (when (file-exists-p nov)
1125         (save-excursion
1126           (set-buffer nntp-server-buffer)
1127           (erase-buffer)
1128           (nnheader-insert-file-contents nov)
1129           (if (and fetch-old
1130                    (not (numberp fetch-old)))
1131               t                         ; Don't remove anything.
1132             (nnheader-nov-delete-outside-range
1133              (if fetch-old (max 1 (- (car articles) fetch-old))
1134                (car articles))
1135              (car (last articles)))
1136             t))))))
1137
1138 (defun nnfolder-parse-head (&optional number b e)
1139   "Parse the head of the current buffer."
1140   (let ((buf (current-buffer))
1141         chars)
1142     (save-excursion
1143       (unless b
1144         (setq b (if (nnmail-search-unix-mail-delim-backward)
1145                     (point) (point-min)))
1146         (forward-line 1)
1147         (setq e (if (nnmail-search-unix-mail-delim)
1148                     (point) (point-max))))
1149       (setq chars (- e b))
1150       (unless (zerop chars)
1151         (goto-char b)
1152         (if (search-forward "\n\n" e t) (setq e (1- (point)))))
1153       (with-temp-buffer
1154         (insert-buffer-substring buf b e)
1155         (let ((headers (nnheader-parse-naked-head)))
1156           (mail-header-set-chars headers chars)
1157           (mail-header-set-number headers number)
1158           headers)))))
1159
1160 (defun nnfolder-add-nov (group article headers)
1161   "Add a nov line for the GROUP base."
1162   (save-excursion
1163     (set-buffer (nnfolder-open-nov group))
1164     (goto-char (point-max))
1165     (mail-header-set-number headers article)
1166     (nnheader-insert-nov headers)))
1167
1168 (deffoo nnfolder-request-set-mark (group actions &optional server)
1169   (when (and server
1170              (not (nnfolder-server-opened server)))
1171     (nnfolder-open-server server))
1172   (unless nnfolder-marks-is-evil
1173     (nnfolder-open-marks group server)
1174     (dolist (action actions)
1175       (let ((range (nth 0 action))
1176             (what  (nth 1 action))
1177             (marks (nth 2 action)))
1178         (assert (or (eq what 'add) (eq what 'del)) nil
1179                 "Unknown request-set-mark action: %s" what)
1180         (dolist (mark marks)
1181           (setq nnfolder-marks (gnus-update-alist-soft
1182                             mark
1183                             (funcall (if (eq what 'add) 'gnus-range-add
1184                                        'gnus-remove-from-range)
1185                                      (cdr (assoc mark nnfolder-marks)) range)
1186                             nnfolder-marks)))))
1187     (nnfolder-save-marks group server))
1188   nil)
1189
1190 (deffoo nnfolder-request-update-info (group info &optional server)
1191   ;; Change servers.
1192   (when (and server
1193              (not (nnfolder-server-opened server)))
1194     (nnfolder-open-server server))
1195   (when (and (not nnfolder-marks-is-evil) (nnfolder-marks-changed-p group))
1196     (nnheader-message 8 "Updating marks for %s..." group)
1197     (nnfolder-open-marks group server)
1198     ;; Update info using `nnfolder-marks'.
1199     (mapcar (lambda (pred)
1200               (unless (memq (cdr pred) gnus-article-unpropagated-mark-lists)
1201                 (gnus-info-set-marks
1202                  info
1203                  (gnus-update-alist-soft
1204                   (cdr pred)
1205                   (cdr (assq (cdr pred) nnfolder-marks))
1206                   (gnus-info-marks info))
1207                  t)))
1208             gnus-article-mark-lists)
1209     (let ((seen (cdr (assq 'read nnfolder-marks))))
1210       (gnus-info-set-read info
1211                           (if (and (integerp (car seen))
1212                                    (null (cdr seen)))
1213                               (list (cons (car seen) (car seen)))
1214                             seen)))
1215     (nnheader-message 8 "Updating marks for %s...done" group))
1216   info)
1217
1218 (defun nnfolder-group-marks-pathname (group)
1219   "Make pathname for GROUP NOV."
1220   (let ((nnfolder-directory (or nnfolder-marks-directory nnfolder-directory)))
1221     (concat (nnfolder-group-pathname group) nnfolder-marks-file-suffix)))
1222
1223 (defun nnfolder-marks-changed-p (group)
1224   (let ((file (nnfolder-group-marks-pathname group)))
1225     (if (null (gnus-gethash file nnfolder-marks-modtime))
1226         t ;; never looked at marks file, assume it has changed
1227       (not (equal (gnus-gethash file nnfolder-marks-modtime)
1228                   (nth 5 (file-attributes file)))))))
1229
1230 (defun nnfolder-save-marks (group server)
1231   (let ((file-name-coding-system nnmail-pathname-coding-system)
1232         (file (nnfolder-group-marks-pathname group)))
1233     (condition-case err
1234         (progn
1235           (with-temp-file file
1236             (erase-buffer)
1237             (gnus-prin1 nnfolder-marks)
1238             (insert "\n"))
1239           (gnus-sethash file
1240                         (nth 5 (file-attributes file))
1241                         nnfolder-marks-modtime))
1242       (error (or (gnus-yes-or-no-p
1243                   (format "Could not write to %s (%s).  Continue? " file err))
1244                  (error "Cannot write to %s (%s)" file err))))))
1245
1246 (defun nnfolder-open-marks (group server)
1247   (let ((file (nnfolder-group-marks-pathname group)))
1248     (if (file-exists-p file)
1249         (condition-case err
1250             (with-temp-buffer
1251               (gnus-sethash file (nth 5 (file-attributes file))
1252                             nnfolder-marks-modtime)
1253               (nnheader-insert-file-contents file)
1254               (setq nnfolder-marks (read (current-buffer)))
1255               (dolist (el gnus-article-unpropagated-mark-lists)
1256                 (setq nnfolder-marks (gnus-remassoc el nnfolder-marks))))
1257           (error (or (gnus-yes-or-no-p
1258                       (format "Error reading nnfolder marks file %s (%s).  Continuing will use marks from .newsrc.eld.  Continue? " file err))
1259                      (error "Cannot read nnfolder marks file %s (%s)" file err))))
1260       ;; User didn't have a .marks file.  Probably first time
1261       ;; user of the .marks stuff.  Bootstrap it from .newsrc.eld.
1262       (let ((info (gnus-get-info
1263                    (gnus-group-prefixed-name
1264                     group
1265                     (gnus-server-to-method (format "nnfolder:%s" server))))))
1266         (nnheader-message 7 "Bootstrapping marks for %s..." group)
1267         (setq nnfolder-marks (gnus-info-marks info))
1268         (push (cons 'read (gnus-info-read info)) nnfolder-marks)
1269         (dolist (el gnus-article-unpropagated-mark-lists)
1270           (setq nnfolder-marks (gnus-remassoc el nnfolder-marks)))
1271         (nnfolder-save-marks group server)
1272         (nnheader-message 7 "Bootstrapping marks for %s...done" group)))))
1273
1274 (provide 'nnfolder)
1275
1276 ;;; arch-tag: a040d0f4-4f4e-445f-8972-839575c5f7e6
1277 ;;; nnfolder.el ends here