lisp/gnus/nnfolder.el

   1 ;;; nnfolder.el --- mail folder access for Gnus
   2
   3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007 Free Software Foundation, Inc.
   5
   6 ;; Author: Simon Josefsson <simon@josefsson.org> (adding MARKS)
   7 ;;      ShengHuo Zhu <zsh@cs.rochester.edu> (adding NOV)
   8 ;;      Scott Byer <byer@mv.us.adobe.com>
   9 ;;      Lars Magne Ingebrigtsen <larsi@gnus.org>
  10 ;;      Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
  11 ;; Keywords: mail
  12
  13 ;; This file is part of GNU Emacs.
  14
  15 ;; GNU Emacs is free software; you can redistribute it and/or modify
  16 ;; it under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation; either version 3, or (at your option)
  18 ;; any later version.
  19
  20 ;; GNU Emacs is distributed in the hope that it will be useful,
  21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 ;; GNU General Public License for more details.
  24
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  27 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  28 ;; Boston, MA 02110-1301, USA.
  29
  30 ;;; Commentary:
  31
  32 ;;; Code:
  33
  34 (require 'nnheader)
  35 (require 'message)
  36 (require 'nnmail)
  37 (require 'nnoo)
  38 (eval-when-compile (require 'cl))
  39 (require 'gnus)
  40 (require 'gnus-util)
  41 (require 'gnus-range)
  42
  43 (eval-and-compile
  44   (autoload 'gnus-article-unpropagatable-p "gnus-sum")
  45   (autoload 'gnus-intersection "gnus-range"))
  46
  47 (nnoo-declare nnfolder)
  48
  49 (defvoo nnfolder-directory (expand-file-name message-directory)
  50   "The name of the nnfolder directory.")
  51
  52 (defvoo nnfolder-nov-directory nil
  53   "The name of the nnfolder NOV directory.
  54 If nil, `nnfolder-directory' is used.")
  55
  56 (defvoo nnfolder-marks-directory nil
  57   "The name of the nnfolder MARKS directory.
  58 If nil, `nnfolder-directory' is used.")
  59
  60 (defvoo nnfolder-active-file
  61     (nnheader-concat nnfolder-directory "active")
  62   "The name of the active file.")
  63
  64 ;; I renamed this variable to something more in keeping with the general GNU
  65 ;; style. -SLB
  66
  67 (defvoo nnfolder-ignore-active-file nil
  68   "If non-nil, the active file is ignored.
  69 This causes nnfolder to do some extra work in order to determine the
  70 true active ranges of an mbox file.  Note that the active file is
  71 still saved, but its values are not used.  This costs some extra time
  72 when scanning an mbox when opening it.")
  73
  74 (defvoo nnfolder-distrust-mbox nil
  75   "If non-nil, the folder will be distrusted.
  76 This means that nnfolder will not trust the user with respect to
  77 inserting unaccounted for mail in the middle of an mbox file.  This
  78 can greatly slow down scans, which now must scan the entire file for
  79 unmarked messages.  When nil, scans occur forward from the last marked
  80 message, a huge time saver for large mailboxes.")
  81
  82 (defvoo nnfolder-newsgroups-file
  83     (concat (file-name-as-directory nnfolder-directory) "newsgroups")
  84   "Mail newsgroups description file.")
  85
  86 (defvoo nnfolder-get-new-mail t
  87   "If non-nil, nnfolder will check the incoming mail file and split the mail.")
  88
  89 (defvoo nnfolder-prepare-save-mail-hook nil
  90   "Hook run narrowed to an article before saving.")
  91
  92 (defvoo nnfolder-save-buffer-hook nil
  93   "Hook run before saving the nnfolder mbox buffer.")
  94
  95
  96 (defvoo nnfolder-inhibit-expiry nil
  97   "If non-nil, inhibit expiry.")
  98
  99 \f
 100
 101 (defconst nnfolder-version "nnfolder 2.0"
 102   "nnfolder version.")
 103
 104 (defconst nnfolder-article-marker "X-Gnus-Article-Number: "
 105   "String used to demarcate what the article number for a message is.")
 106
 107 (defvoo nnfolder-current-group nil)
 108 (defvoo nnfolder-current-buffer nil)
 109 (defvoo nnfolder-status-string "")
 110 (defvoo nnfolder-group-alist nil)
 111 (defvoo nnfolder-buffer-alist nil)
 112 (defvoo nnfolder-scantime-alist nil)
 113 (defvoo nnfolder-active-timestamp nil)
 114 (defvoo nnfolder-active-file-coding-system mm-text-coding-system)
 115 (defvoo nnfolder-active-file-coding-system-for-write
 116     nnmail-active-file-coding-system)
 117 (defvoo nnfolder-file-coding-system mm-text-coding-system)
 118 (defvoo nnfolder-file-coding-system-for-write nnheader-file-coding-system
 119   "Coding system for save nnfolder file.
 120 if nil, `nnfolder-file-coding-system' is used.") ; FIXME: fill-in the doc-string of this variable
 121
 122 (defvoo nnfolder-nov-is-evil nil
 123   "If non-nil, Gnus will never generate and use nov databases for mail groups.
 124 Using nov databases will speed up header fetching considerably.
 125 This variable shouldn't be flipped much.  If you have, for some reason,
 126 set this to t, and want to set it to nil again, you should always run
 127 the `nnfolder-generate-active-file' command.  The function will go
 128 through all nnfolder directories and generate nov databases for them
 129 all.  This may very well take some time.")
 130
 131 (defvoo nnfolder-nov-file-suffix ".nov")
 132
 133 (defvoo nnfolder-nov-buffer-alist nil)
 134
 135 (defvar nnfolder-nov-buffer-file-name nil)
 136
 137 (defvoo nnfolder-marks-is-evil nil
 138   "If non-nil, Gnus will never generate and use marks file for mail groups.
 139 Using marks files makes it possible to backup and restore mail groups
 140 separately from `.newsrc.eld'.  If you have, for some reason, set
 141 this to t, and want to set it to nil again, you should always remove
 142 the corresponding marks file (usually base nnfolder file name
 143 concatenated with `.mrk', but see `nnfolder-marks-file-suffix') for
 144 the group.  Then the marks file will be regenerated properly by Gnus.")
 145
 146 (defvoo nnfolder-marks nil)
 147
 148 (defvoo nnfolder-marks-file-suffix ".mrk")
 149
 150 (defvar nnfolder-marks-modtime (gnus-make-hashtable))
 151
 152 \f
 153
 154 ;;; Interface functions
 155
 156 (nnoo-define-basics nnfolder)
 157
 158 (deffoo nnfolder-retrieve-headers (articles &optional group server fetch-old)
 159   (save-excursion
 160     (set-buffer nntp-server-buffer)
 161     (erase-buffer)
 162     (let (article start stop num)
 163       (nnfolder-possibly-change-group group server)
 164       (when nnfolder-current-buffer
 165         (set-buffer nnfolder-current-buffer)
 166         (goto-char (point-min))
 167         (if (stringp (car articles))
 168             'headers
 169           (if (nnfolder-retrieve-headers-with-nov articles fetch-old)
 170               'nov
 171             (setq articles (gnus-sorted-intersection
 172                             ;; Is ARTICLES sorted?
 173                             (sort articles '<)
 174                             (nnfolder-existing-articles)))
 175             (while (setq article (pop articles))
 176               (set-buffer nnfolder-current-buffer)
 177               (cond ((nnfolder-goto-article article)
 178                      (setq start (point))
 179                      (setq stop (if (search-forward "\n\n" nil t)
 180                                     (1- (point))
 181                                   (point-max)))
 182                      (set-buffer nntp-server-buffer)
 183                      (insert (format "221 %d Article retrieved.\n" article))
 184                      (insert-buffer-substring nnfolder-current-buffer
 185                                               start stop)
 186                      (goto-char (point-max))
 187                      (insert ".\n"))
 188
 189                     ;; If we couldn't find this article, skip over ranges
 190                     ;; of missing articles so we don't search the whole file
 191                     ;; for each of them.
 192                     ((numberp article)
 193                      (setq start (point))
 194                      (and
 195                       ;; Check that we are either at BOF or after an
 196                       ;; article with a lower number.  We do this so we
 197                       ;; won't be confused by out-of-order article numbers,
 198                       ;; as caused by active file bogosity.
 199                       (cond
 200                        ((bobp))
 201                        ((search-backward (concat "\n" nnfolder-article-marker)
 202                                          nil t)
 203                         (goto-char (match-end 0))
 204                         (setq num (string-to-number
 205                                    (buffer-substring
 206                                     (point) (point-at-eol))))
 207                         (goto-char start)
 208                         (< num article)))
 209                       ;; Check that we are before an article with a
 210                       ;; higher number.
 211                       (search-forward (concat "\n" nnfolder-article-marker)
 212                                       nil t)
 213                       (progn
 214                         (setq num (string-to-number
 215                                    (buffer-substring
 216                                     (point) (point-at-eol))))
 217                         (> num article))
 218                       ;; Discard any article numbers before the one we're
 219                       ;; now looking at.
 220                       (while (and articles
 221                                   (< (car articles) num))
 222                         (setq articles (cdr articles))))
 223                      (goto-char start))))
 224             (set-buffer nntp-server-buffer)
 225             (nnheader-fold-continuation-lines)
 226             'headers))))))
 227
 228 (deffoo nnfolder-open-server (server &optional defs)
 229   (nnoo-change-server 'nnfolder server defs)
 230   (nnmail-activate 'nnfolder t)
 231   (gnus-make-directory nnfolder-directory)
 232   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 233     (and nnfolder-nov-directory
 234          (gnus-make-directory nnfolder-nov-directory)))
 235   (unless nnfolder-marks-is-evil
 236     (and nnfolder-marks-directory
 237          (gnus-make-directory nnfolder-marks-directory)))
 238   (cond
 239    ((not (file-exists-p nnfolder-directory))
 240     (nnfolder-close-server)
 241     (nnheader-report 'nnfolder "Couldn't create directory: %s"
 242                      nnfolder-directory))
 243    ((not (file-directory-p (file-truename nnfolder-directory)))
 244     (nnfolder-close-server)
 245     (nnheader-report 'nnfolder "Not a directory: %s" nnfolder-directory))
 246    (t
 247     (nnmail-activate 'nnfolder)
 248     (nnheader-report 'nnfolder "Opened server %s using directory %s"
 249                      server nnfolder-directory)
 250     t)))
 251
 252 (deffoo nnfolder-request-close ()
 253   (let ((alist nnfolder-buffer-alist))
 254     (while alist
 255       (nnfolder-close-group (caar alist) nil t)
 256       (setq alist (cdr alist))))
 257   (nnoo-close-server 'nnfolder)
 258   (setq nnfolder-buffer-alist nil
 259         nnfolder-group-alist nil))
 260
 261 (deffoo nnfolder-request-article (article &optional group server buffer)
 262   (nnfolder-possibly-change-group group server)
 263   (save-excursion
 264     (set-buffer nnfolder-current-buffer)
 265     (goto-char (point-min))
 266     (when (nnfolder-goto-article article)
 267       (let (start stop)
 268         (setq start (point))
 269         (forward-line 1)
 270         (unless (and (nnmail-search-unix-mail-delim)
 271                      (forward-line -1))
 272           (goto-char (point-max)))
 273         (setq stop (point))
 274         (let ((nntp-server-buffer (or buffer nntp-server-buffer)))
 275           (set-buffer nntp-server-buffer)
 276           (erase-buffer)
 277           (insert-buffer-substring nnfolder-current-buffer start stop)
 278           (goto-char (point-min))
 279           (while (looking-at "From ")
 280             (delete-char 5)
 281             (insert "X-From-Line: ")
 282             (forward-line 1))
 283           (if (numberp article)
 284               (cons nnfolder-current-group article)
 285             (goto-char (point-min))
 286             (cons nnfolder-current-group
 287                   (if (search-forward (concat "\n" nnfolder-article-marker)
 288                                       nil t)
 289                       (string-to-number (buffer-substring
 290                                       (point) (point-at-eol)))
 291                     -1))))))))
 292
 293 (deffoo nnfolder-request-group (group &optional server dont-check)
 294   (nnfolder-possibly-change-group group server t)
 295   (save-excursion
 296     (cond ((not (assoc group nnfolder-group-alist))
 297            (nnheader-report 'nnfolder "No such group: %s" group))
 298           ((file-directory-p (nnfolder-group-pathname group))
 299            (nnheader-report 'nnfolder "%s is a directory"
 300                             (file-name-as-directory
 301                              (let ((nnmail-pathname-coding-system nil))
 302                                (nnfolder-group-pathname group)))))
 303           (dont-check
 304            (nnheader-report 'nnfolder "Selected group %s" group)
 305            t)
 306           (t
 307            (let* ((active (assoc group nnfolder-group-alist))
 308                   (group (car active))
 309                   (range (cadr active)))
 310              (cond
 311               ((null active)
 312                (nnheader-report 'nnfolder "No such group: %s" group))
 313               ((null nnfolder-current-group)
 314                (nnheader-report 'nnfolder "Empty group: %s" group))
 315               (t
 316                (nnheader-report 'nnfolder "Selected group %s" group)
 317                (nnheader-insert "211 %d %d %d %s\n"
 318                                 (1+ (- (cdr range) (car range)))
 319                                 (car range) (cdr range) group))))))))
 320
 321 (deffoo nnfolder-request-scan (&optional group server)
 322   (nnfolder-possibly-change-group nil server)
 323   (when nnfolder-get-new-mail
 324     (nnfolder-possibly-change-group group server)
 325     (nnmail-get-new-mail
 326      'nnfolder
 327      (lambda ()
 328        (let ((bufs nnfolder-buffer-alist))
 329          (save-excursion
 330            (while bufs
 331              (if (not (gnus-buffer-live-p (nth 1 (car bufs))))
 332                  (setq nnfolder-buffer-alist
 333                        (delq (car bufs) nnfolder-buffer-alist))
 334                (set-buffer (nth 1 (car bufs)))
 335                (nnfolder-save-buffer)
 336                (kill-buffer (current-buffer)))
 337              (setq bufs (cdr bufs))))))
 338      nnfolder-directory
 339      group)))
 340
 341 ;; Don't close the buffer if we're not shutting down the server.  This way,
 342 ;; we can keep the buffer in the group buffer cache, and not have to grovel
 343 ;; over the buffer again unless we add new mail to it or modify it in some
 344 ;; way.
 345
 346 (deffoo nnfolder-close-group (group &optional server force)
 347   ;; Make sure we _had_ the group open.
 348   (when (or (assoc group nnfolder-buffer-alist)
 349             (equal group nnfolder-current-group))
 350     (let ((inf (assoc group nnfolder-buffer-alist)))
 351       (when inf
 352         (when (and nnfolder-current-group
 353                    nnfolder-current-buffer)
 354           (push (list nnfolder-current-group nnfolder-current-buffer)
 355                 nnfolder-buffer-alist))
 356         (setq nnfolder-buffer-alist
 357               (delq inf nnfolder-buffer-alist))
 358         (setq nnfolder-current-buffer (cadr inf)
 359               nnfolder-current-group (car inf))))
 360     (when (and nnfolder-current-buffer
 361                (buffer-name nnfolder-current-buffer))
 362       (save-excursion
 363         (set-buffer nnfolder-current-buffer)
 364         ;; If the buffer was modified, write the file out now.
 365         (nnfolder-save-buffer)
 366         ;; If we're shutting the server down, we need to kill the
 367         ;; buffer and remove it from the open buffer list.  Or, of
 368         ;; course, if we're trying to minimize our space impact.
 369         (kill-buffer (current-buffer))
 370         (setq nnfolder-buffer-alist (delq (assoc group nnfolder-buffer-alist)
 371                                           nnfolder-buffer-alist)))))
 372   (setq nnfolder-current-group nil
 373         nnfolder-current-buffer nil)
 374   t)
 375
 376 (deffoo nnfolder-request-create-group (group &optional server args)
 377   (nnfolder-possibly-change-group nil server)
 378   (nnmail-activate 'nnfolder)
 379   (cond ((zerop (length group))
 380          (nnheader-report 'nnfolder "Invalid (empty) group name"))
 381         ((file-directory-p (nnfolder-group-pathname group))
 382          (nnheader-report 'nnfolder "%s is a directory"
 383                           (file-name-as-directory
 384                            (let ((nnmail-pathname-coding-system nil))
 385                              (nnfolder-group-pathname group)))))
 386         ((assoc group nnfolder-group-alist)
 387          t)
 388         (t
 389          (push (list group (cons 1 0)) nnfolder-group-alist)
 390          (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 391          (save-current-buffer
 392            (nnfolder-read-folder group))
 393          t)))
 394
 395 (deffoo nnfolder-request-list (&optional server)
 396   (nnfolder-possibly-change-group nil server)
 397   (save-excursion
 398     (let ((nnmail-file-coding-system nnfolder-active-file-coding-system))
 399       (nnmail-find-file nnfolder-active-file)
 400       (setq nnfolder-group-alist (nnmail-get-active)))
 401     t))
 402
 403 (deffoo nnfolder-request-newgroups (date &optional server)
 404   (nnfolder-possibly-change-group nil server)
 405   (nnfolder-request-list server))
 406
 407 (deffoo nnfolder-request-list-newsgroups (&optional server)
 408   (nnfolder-possibly-change-group nil server)
 409   (save-excursion
 410     (let ((nnmail-file-coding-system nnfolder-file-coding-system))
 411       (nnmail-find-file nnfolder-newsgroups-file))))
 412
 413 ;; Return a list consisting of all article numbers existing in the
 414 ;; current folder.
 415
 416 (defun nnfolder-existing-articles ()
 417   (save-excursion
 418     (when nnfolder-current-buffer
 419       (set-buffer nnfolder-current-buffer)
 420       (goto-char (point-min))
 421       (let ((marker (concat "\n" nnfolder-article-marker))
 422             (number "[0-9]+")
 423             numbers)
 424         (while (and (search-forward marker nil t)
 425                     (re-search-forward number nil t))
 426           (let ((newnum (string-to-number (match-string 0))))
 427             (if (nnmail-within-headers-p)
 428                 (push newnum numbers))))
 429       ;; The article numbers are increasing, so this result is sorted.
 430         (nreverse numbers)))))
 431
 432 (deffoo nnfolder-request-expire-articles (articles newsgroup
 433                                                    &optional server force)
 434   (nnfolder-possibly-change-group newsgroup server)
 435   (let ((is-old t)
 436         ;; The articles we have deleted so far.
 437         (deleted-articles nil)
 438         ;; The articles that really exist and will
 439         ;; be expired if they are old enough.
 440         (maybe-expirable
 441          (gnus-sorted-intersection articles (nnfolder-existing-articles)))
 442         target)
 443     (nnmail-activate 'nnfolder)
 444
 445     (save-excursion
 446       (set-buffer nnfolder-current-buffer)
 447       ;; Since messages are sorted in arrival order and expired in the
 448       ;; same order, we can stop as soon as we find a message that is
 449       ;; too old.
 450       (while (and maybe-expirable is-old)
 451         (goto-char (point-min))
 452         (when (and (nnfolder-goto-article (car maybe-expirable))
 453                    (search-forward (concat "\n" nnfolder-article-marker)
 454                                    nil t))
 455           (forward-sexp)
 456           (when (setq is-old
 457                       (nnmail-expired-article-p
 458                        newsgroup
 459                        (buffer-substring
 460                         (point) (progn (end-of-line) (point)))
 461                        force nnfolder-inhibit-expiry))
 462             (setq target nnmail-expiry-target)
 463             (unless (eq target 'delete)
 464               (with-temp-buffer
 465                 (nnfolder-request-article (car maybe-expirable)
 466                                           newsgroup server (current-buffer))
 467                 (let ((nnfolder-current-directory nil))
 468                   (when (functionp target)
 469                     (setq target (funcall target newsgroup)))
 470                   (if (and target
 471                            (or (gnus-request-group target)
 472                                (gnus-request-create-group target)))
 473                       (nnmail-expiry-target-group target newsgroup)
 474                     (setq target nil))))
 475               (nnfolder-possibly-change-group newsgroup server))
 476             (when target
 477               (nnheader-message 5 "Deleting article %d in %s..."
 478                                 (car maybe-expirable) newsgroup)
 479               (nnfolder-delete-mail)
 480               (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 481                 (nnfolder-nov-delete-article newsgroup (car maybe-expirable)))
 482               ;; Must remember which articles were actually deleted
 483               (push (car maybe-expirable) deleted-articles))))
 484         (setq maybe-expirable (cdr maybe-expirable)))
 485       (unless nnfolder-inhibit-expiry
 486         (nnheader-message 5 "Deleting articles...done"))
 487       (nnfolder-save-buffer)
 488       (nnfolder-adjust-min-active newsgroup)
 489       (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 490       (gnus-sorted-difference articles (nreverse deleted-articles)))))
 491
 492 (deffoo nnfolder-request-move-article (article group server accept-form
 493                                                &optional last move-is-internal)
 494   (save-excursion
 495     (let ((buf (get-buffer-create " *nnfolder move*"))
 496           result)
 497       (and
 498        (nnfolder-request-article article group server)
 499        (save-excursion
 500          (set-buffer buf)
 501          (erase-buffer)
 502          (insert-buffer-substring nntp-server-buffer)
 503          (goto-char (point-min))
 504          (while (re-search-forward
 505                  (concat "^" nnfolder-article-marker)
 506                  (save-excursion (and (search-forward "\n\n" nil t) (point)))
 507                  t)
 508            (gnus-delete-line))
 509          (setq result (eval accept-form))
 510          (kill-buffer buf)
 511          result)
 512        (save-excursion
 513          (nnfolder-possibly-change-group group server)
 514          (set-buffer nnfolder-current-buffer)
 515          (goto-char (point-min))
 516          (when (nnfolder-goto-article article)
 517            (nnfolder-delete-mail))
 518          (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 519            (nnfolder-nov-delete-article group article))
 520          (when last
 521            (nnfolder-save-buffer)
 522            (nnfolder-adjust-min-active group)
 523            (nnfolder-save-active nnfolder-group-alist nnfolder-active-file))))
 524       result)))
 525
 526 (deffoo nnfolder-request-accept-article (group &optional server last)
 527   (save-excursion
 528     (nnfolder-possibly-change-group group server)
 529     (nnmail-check-syntax)
 530     (let ((buf (current-buffer))
 531           result art-group)
 532       (goto-char (point-min))
 533       (when (looking-at "X-From-Line: ")
 534         (replace-match "From ")
 535         (while (progn (forward-line) (looking-at "[ \t]"))
 536           (delete-char -1)))
 537       (with-temp-buffer
 538         (let ((nnmail-file-coding-system nnfolder-active-file-coding-system)
 539               (nntp-server-buffer (current-buffer)))
 540           (nnmail-find-file nnfolder-active-file)
 541           (setq nnfolder-group-alist (nnmail-parse-active))))
 542       (save-excursion
 543         (goto-char (point-min))
 544         (if (search-forward "\n\n" nil t)
 545             (forward-line -1)
 546           (goto-char (point-max)))
 547         (while (re-search-backward (concat "^" nnfolder-article-marker) nil t)
 548           (delete-region (point) (progn (forward-line 1) (point))))
 549         (when nnmail-cache-accepted-message-ids
 550           (nnmail-cache-insert (nnmail-fetch-field "message-id")
 551                                group
 552                                (nnmail-fetch-field "subject")
 553                                (nnmail-fetch-field "from")))
 554         (setq result (if (stringp group)
 555                          (list (cons group (nnfolder-active-number group)))
 556                        (setq art-group
 557                              (nnmail-article-group 'nnfolder-active-number))))
 558         (if (and (null result)
 559                  (yes-or-no-p "Moved to `junk' group; delete article? "))
 560             (setq result 'junk)
 561           (setq result
 562                 (car (nnfolder-save-mail result)))))
 563       (when last
 564         (save-excursion
 565           (nnfolder-possibly-change-folder (or (caar art-group) group))
 566           (nnfolder-save-buffer)
 567           (when nnmail-cache-accepted-message-ids
 568             (nnmail-cache-close))))
 569       (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 570       (unless result
 571         (nnheader-report 'nnfolder "Couldn't store article"))
 572       result)))
 573
 574 (deffoo nnfolder-request-replace-article (article group buffer)
 575   (nnfolder-possibly-change-group group)
 576   (save-excursion
 577     (set-buffer buffer)
 578     (goto-char (point-min))
 579     (if (not (looking-at "X-From-Line: "))
 580         (insert "From nobody " (current-time-string) "\n")
 581       (replace-match "From ")
 582       (forward-line 1)
 583       (while (looking-at "[ \t]")
 584         (delete-char -1)
 585         (forward-line 1)))
 586     (nnfolder-normalize-buffer)
 587     (set-buffer nnfolder-current-buffer)
 588     (goto-char (point-min))
 589     (if (not (nnfolder-goto-article article))
 590         nil
 591       (nnfolder-delete-mail)
 592       (insert-buffer-substring buffer)
 593       (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 594         (save-excursion
 595           (set-buffer buffer)
 596           (let ((headers (nnfolder-parse-head article
 597                                               (point-min) (point-max))))
 598             (with-current-buffer (nnfolder-open-nov group)
 599               (if (nnheader-find-nov-line article)
 600                   (delete-region (point) (progn (forward-line 1) (point))))
 601               (nnheader-insert-nov headers)))))
 602       (nnfolder-save-buffer)
 603       t)))
 604
 605 (deffoo nnfolder-request-delete-group (group &optional force server)
 606   (nnfolder-close-group group server t)
 607   ;; Delete all articles in GROUP.
 608   (if (not force)
 609       ()                                ; Don't delete the articles.
 610     ;; Delete the file that holds the group.
 611     (let ((data (nnfolder-group-pathname group))
 612           (nov (nnfolder-group-nov-pathname group))
 613           (mrk (nnfolder-group-marks-pathname group)))
 614       (ignore-errors (delete-file data))
 615       (ignore-errors (delete-file nov))
 616       (ignore-errors (delete-file mrk))))
 617   ;; Remove the group from all structures.
 618   (setq nnfolder-group-alist
 619         (delq (assoc group nnfolder-group-alist) nnfolder-group-alist)
 620         nnfolder-current-group nil
 621         nnfolder-current-buffer nil)
 622   ;; Save the active file.
 623   (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 624   t)
 625
 626 (deffoo nnfolder-request-rename-group (group new-name &optional server)
 627   (nnfolder-possibly-change-group group server)
 628   (save-excursion
 629     (set-buffer nnfolder-current-buffer)
 630     (and (file-writable-p buffer-file-name)
 631          (ignore-errors
 632            (let ((new-file (nnfolder-group-pathname new-name)))
 633              (gnus-make-directory (file-name-directory new-file))
 634              (rename-file buffer-file-name new-file)
 635              (when (file-exists-p (nnfolder-group-nov-pathname group))
 636                (setq new-file (nnfolder-group-nov-pathname new-name))
 637                (gnus-make-directory (file-name-directory new-file))
 638                (rename-file (nnfolder-group-nov-pathname group) new-file))
 639              (when (file-exists-p (nnfolder-group-marks-pathname group))
 640                (setq new-file (nnfolder-group-marks-pathname new-name))
 641                (gnus-make-directory (file-name-directory new-file))
 642                (rename-file (nnfolder-group-marks-pathname group) new-file)))
 643            t)
 644          ;; That went ok, so we change the internal structures.
 645          (let ((entry (assoc group nnfolder-group-alist)))
 646            (and entry (setcar entry new-name))
 647            (setq nnfolder-current-buffer nil
 648                  nnfolder-current-group nil)
 649            ;; Save the new group alist.
 650            (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 651            ;; We kill the buffer instead of renaming it and stuff.
 652            (kill-buffer (current-buffer))
 653            t))))
 654
 655 (deffoo nnfolder-request-regenerate (server)
 656   (nnfolder-possibly-change-group nil server)
 657   (nnfolder-generate-active-file)
 658   t)
 659
 660 \f
 661 ;;; Internal functions.
 662
 663 (defun nnfolder-adjust-min-active (group)
 664   ;; Find the lowest active article in this group.
 665   (let* ((active (cadr (assoc group nnfolder-group-alist)))
 666          (marker (concat "\n" nnfolder-article-marker))
 667          (number "[0-9]+")
 668          (activemin (cdr active)))
 669     (save-excursion
 670       (set-buffer nnfolder-current-buffer)
 671       (goto-char (point-min))
 672       (while (and (search-forward marker nil t)
 673                   (re-search-forward number nil t))
 674         (let ((newnum (string-to-number (match-string 0))))
 675           (if (nnmail-within-headers-p)
 676               (setq activemin (min activemin newnum)))))
 677       (setcar active activemin))))
 678
 679 (defun nnfolder-article-string (article)
 680   (if (numberp article)
 681       (concat "\n" nnfolder-article-marker (int-to-string article) " ")
 682     (concat "\nMessage-ID: " article)))
 683
 684 (defun nnfolder-goto-article (article)
 685   "Place point at the start of the headers of ARTICLE.
 686 ARTICLE can be an article number or a Message-ID.
 687 Returns t if successful, nil otherwise."
 688   (let ((art-string (nnfolder-article-string article))
 689         start found)
 690     ;; It is likely that we are at or before the delimiter line.
 691     ;; We therefore go to the end of the previous line, and start
 692     ;; searching from there.
 693     (beginning-of-line)
 694     (unless (bobp)
 695       (forward-char -1))
 696     (setq start (point))
 697     ;; First search forward.
 698     (while (and (setq found (search-forward art-string nil t))
 699                 (not (nnmail-within-headers-p))))
 700     ;; If unsuccessful, search backward from where we started,
 701     (unless found
 702       (goto-char start)
 703       (while (and (setq found (search-backward art-string nil t))
 704                   (not (nnmail-within-headers-p)))))
 705     (when found
 706       (nnmail-search-unix-mail-delim-backward))))
 707
 708 (defun nnfolder-delete-mail (&optional leave-delim)
 709   "Delete the message that point is in.
 710 If optional argument LEAVE-DELIM is t, then mailbox delimiter is not
 711 deleted.  Point is left where the deleted region was."
 712   (save-restriction
 713     (narrow-to-region
 714      (save-excursion
 715        ;; In case point is at the beginning of the message already.
 716        (forward-line 1)
 717        (nnmail-search-unix-mail-delim-backward)
 718        (if leave-delim (progn (forward-line 1) (point))
 719          (point)))
 720      (progn
 721        (forward-line 1)
 722        (if (nnmail-search-unix-mail-delim)
 723            (point)
 724          (point-max))))
 725     (run-hooks 'nnfolder-delete-mail-hook)
 726     (delete-region (point-min) (point-max))))
 727
 728 (defun nnfolder-possibly-change-group (group &optional server dont-check)
 729   ;; Change servers.
 730   (when (and server
 731              (not (nnfolder-server-opened server)))
 732     (nnfolder-open-server server))
 733   (unless (gnus-buffer-live-p nnfolder-current-buffer)
 734     (setq nnfolder-current-buffer nil
 735           nnfolder-current-group nil))
 736   ;; Change group.
 737   (let ((file-name-coding-system nnmail-pathname-coding-system))
 738     (when (and group
 739                (not (equal group nnfolder-current-group))
 740                (progn
 741                  (nnmail-activate 'nnfolder)
 742                  (and (assoc group nnfolder-group-alist)
 743                       (file-exists-p (nnfolder-group-pathname group)))))
 744       (if dont-check
 745           (setq nnfolder-current-group group
 746                 nnfolder-current-buffer nil)
 747         (let (inf file)
 748           ;; If we have to change groups, see if we don't already have
 749           ;; the folder in memory.  If we do, verify the modtime and
 750           ;; destroy the folder if needed so we can rescan it.
 751           (setq nnfolder-current-buffer
 752                 (nth 1 (assoc group nnfolder-buffer-alist)))
 753
 754           ;; If the buffer is not live, make sure it isn't in the
 755           ;; alist.  If it is live, verify that nobody else has
 756           ;; touched the file since last time.
 757           (when (and nnfolder-current-buffer
 758                      (not (gnus-buffer-live-p nnfolder-current-buffer)))
 759             (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)
 760                   nnfolder-current-buffer nil))
 761
 762           (setq nnfolder-current-group group)
 763
 764           (when (or (not nnfolder-current-buffer)
 765                     (not (verify-visited-file-modtime
 766                           nnfolder-current-buffer)))
 767             (save-excursion
 768               (setq file (nnfolder-group-pathname group))
 769               ;; See whether we need to create the new file.
 770               (unless (file-exists-p file)
 771                 (gnus-make-directory (file-name-directory file))
 772                 (let ((nnmail-file-coding-system
 773                        (or nnfolder-file-coding-system-for-write
 774                            nnfolder-file-coding-system-for-write)))
 775                   (nnmail-write-region (point-min) (point-min)
 776                                        file t 'nomesg)))
 777               (when (setq nnfolder-current-buffer (nnfolder-read-folder group))
 778                 (set-buffer nnfolder-current-buffer)
 779                 (push (list group nnfolder-current-buffer)
 780                       nnfolder-buffer-alist)))))))))
 781
 782 (defun nnfolder-save-mail (group-art-list)
 783   "Called narrowed to an article."
 784   (let* (save-list group-art)
 785     (goto-char (point-min))
 786     ;; The From line may have been quoted by movemail.
 787     (when (looking-at ">From")
 788       (delete-char 1))
 789     ;; This might come from somewhere else.
 790     (unless (looking-at "From ")
 791       (insert "From nobody " (current-time-string) "\n")
 792       (goto-char (point-min)))
 793     ;; Quote all "From " lines in the article.
 794     (forward-line 1)
 795     (let (case-fold-search)
 796       (while (re-search-forward "^From " nil t)
 797         (beginning-of-line)
 798         (insert "> ")))
 799     (setq save-list group-art-list)
 800     (nnmail-insert-lines)
 801     (nnmail-insert-xref group-art-list)
 802     (run-hooks 'nnmail-prepare-save-mail-hook)
 803     (run-hooks 'nnfolder-prepare-save-mail-hook)
 804
 805     ;; Insert the mail into each of the destination groups.
 806     (while (setq group-art (pop group-art-list))
 807       ;; Kill any previous newsgroup markers.
 808       (goto-char (point-min))
 809       (if (search-forward "\n\n" nil t)
 810           (forward-line -1)
 811         (goto-char (point-max)))
 812       (while (search-backward (concat "\n" nnfolder-article-marker) nil t)
 813         (delete-region (1+ (point)) (progn (forward-line 2) (point))))
 814
 815       ;; Insert the new newsgroup marker.
 816       (nnfolder-insert-newsgroup-line group-art)
 817
 818       (save-excursion
 819         (let ((beg (point-min))
 820               (end (point-max))
 821               (obuf (current-buffer)))
 822           (nnfolder-possibly-change-folder (car group-art))
 823           (let ((buffer-read-only nil))
 824             (nnfolder-normalize-buffer)
 825             (insert-buffer-substring obuf beg end))
 826           (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 827             (set-buffer obuf)
 828             (nnfolder-add-nov (car group-art) (cdr group-art)
 829                               (nnfolder-parse-head nil beg end))))))
 830
 831     ;; Did we save it anywhere?
 832     save-list))
 833
 834 (defun nnfolder-normalize-buffer ()
 835   "Make sure there are two newlines at the end of the buffer."
 836   (goto-char (point-max))
 837   (skip-chars-backward "\n")
 838   (delete-region (point) (point-max))
 839   (unless (bobp)
 840     (insert "\n\n")))
 841
 842 (defun nnfolder-insert-newsgroup-line (group-art)
 843   (save-excursion
 844     (goto-char (point-min))
 845     (unless (search-forward "\n\n" nil t)
 846       (goto-char (point-max))
 847       (insert "\n"))
 848     (forward-char -1)
 849     (insert (format (concat nnfolder-article-marker "%d   %s\n")
 850                     (cdr group-art) (message-make-date)))))
 851
 852 (defun nnfolder-active-number (group)
 853   ;; Find the next article number in GROUP.
 854   (let ((active (cadr (assoc group nnfolder-group-alist))))
 855     (if active
 856         (setcdr active (1+ (cdr active)))
 857       ;; This group is new, so we create a new entry for it.
 858       ;; This might be a bit naughty... creating groups on the drop of
 859       ;; a hat, but I don't know...
 860       (push (list group (setq active (cons 1 1)))
 861             nnfolder-group-alist))
 862     (cdr active)))
 863
 864 (defun nnfolder-possibly-change-folder (group)
 865   (let ((inf (assoc group nnfolder-buffer-alist)))
 866     (if (and inf
 867              (gnus-buffer-live-p (cadr inf)))
 868         (set-buffer (cadr inf))
 869       (when inf
 870         (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)))
 871       (when nnfolder-group-alist
 872         (nnfolder-save-active nnfolder-group-alist nnfolder-active-file))
 873       (push (list group (nnfolder-read-folder group))
 874             nnfolder-buffer-alist))))
 875
 876 ;; This method has a problem if you've accidentally let the active
 877 ;; list get out of sync with the files.  This could happen, say, if
 878 ;; you've accidentally gotten new mail with something other than Gnus
 879 ;; (but why would _that_ ever happen? :-).  In that case, we will be
 880 ;; in the middle of processing the file, ready to add new X-Gnus
 881 ;; article number markers, and we'll run across a message with no ID
 882 ;; yet - the active list _may_not_ be ready for us yet.
 883
 884 ;; To handle this, I'm modifying this routine to maintain the maximum
 885 ;; ID seen so far, and when we hit a message with no ID, we will
 886 ;; _manually_ scan the rest of the message looking for any more,
 887 ;; possibly higher IDs.  We'll assume the maximum that we find is the
 888 ;; highest active.  Note that this shouldn't cost us much extra time
 889 ;; at all, but will be a lot less vulnerable to glitches between the
 890 ;; mbox and the active file.
 891
 892 (defun nnfolder-read-folder (group)
 893   (let* ((file (nnfolder-group-pathname group))
 894          (nov  (nnfolder-group-nov-pathname group))
 895          (buffer (set-buffer
 896                   (let ((nnheader-file-coding-system
 897                          nnfolder-file-coding-system))
 898                     (nnheader-find-file-noselect file t)))))
 899     (mm-enable-multibyte) ;; Use multibyte buffer for future copying.
 900     (buffer-disable-undo)
 901     (if (equal (cadr (assoc group nnfolder-scantime-alist))
 902                (nth 5 (file-attributes file)))
 903         ;; This looks up-to-date, so we don't do any scanning.
 904         (if (file-exists-p file)
 905             buffer
 906           (push (list group buffer) nnfolder-buffer-alist)
 907           (set-buffer-modified-p t)
 908           (nnfolder-save-buffer))
 909       ;; Parse the damn thing.
 910       (save-excursion
 911         (goto-char (point-min))
 912         ;; Remove any blank lines at the start.
 913         (while (eq (following-char) ?\n)
 914           (delete-char 1))
 915         (nnmail-activate 'nnfolder)
 916         ;; Read in the file.
 917         (let ((delim "^From ")
 918               (marker (concat "\n" nnfolder-article-marker))
 919               (number "[0-9]+")
 920               (active (or (cadr (assoc group nnfolder-group-alist))
 921                           (cons 1 0)))
 922               (scantime (assoc group nnfolder-scantime-alist))
 923               (minid (lsh -1 -1))
 924               maxid start end newscantime
 925               novbuf articles newnum
 926               buffer-read-only)
 927           (setq maxid (cdr active))
 928
 929           (unless (or gnus-nov-is-evil nnfolder-nov-is-evil
 930                       (and (file-exists-p nov)
 931                            (file-newer-than-file-p nov file)))
 932             (unless (file-exists-p nov)
 933               (gnus-make-directory (file-name-directory nov)))
 934             (with-current-buffer
 935                 (setq novbuf (nnfolder-open-nov group))
 936               (goto-char (point-min))
 937               (while (not (eobp))
 938                 (push (read novbuf) articles)
 939                 (forward-line 1))
 940               (setq articles (nreverse articles))))
 941           (goto-char (point-min))
 942
 943           ;; Anytime the active number is 1 or 0, it is suspect.  In
 944           ;; that case, search the file manually to find the active
 945           ;; number.  Or, of course, if we're being paranoid.  (This
 946           ;; would also be the place to build other lists from the
 947           ;; header markers, such as expunge lists, etc., if we ever
 948           ;; desired to abandon the active file entirely for mboxes.)
 949           (when (or nnfolder-ignore-active-file
 950                     novbuf
 951                     (< maxid 2))
 952             (while (and (search-forward marker nil t)
 953                         (looking-at number))
 954               (setq newnum (string-to-number (match-string 0)))
 955               (when (nnmail-within-headers-p)
 956                 (setq maxid (max maxid newnum)
 957                       minid (min minid newnum))
 958                 (when novbuf
 959                   (if (memq newnum articles)
 960                       (setq articles (delq newnum articles))
 961                     (let ((headers (nnfolder-parse-head newnum)))
 962                       (with-current-buffer novbuf
 963                         (nnheader-find-nov-line newnum)
 964                         (nnheader-insert-nov headers)))))))
 965             (when (and novbuf articles)
 966               (with-current-buffer novbuf
 967                 (dolist (article articles)
 968                   (when (nnheader-find-nov-line article)
 969                     (delete-region (point)
 970                                    (progn (forward-line 1) (point)))))))
 971             (setcar active (max 1 (min minid maxid)))
 972             (setcdr active (max maxid (cdr active)))
 973             (goto-char (point-min)))
 974
 975           ;; As long as we trust that the user will only insert
 976           ;; unmarked mail at the end, go to the end and search
 977           ;; backwards for the last marker.  Find the start of that
 978           ;; message, and begin to search for unmarked messages from
 979           ;; there.
 980           (when (not (or nnfolder-distrust-mbox
 981                          (< maxid 2)))
 982             (goto-char (point-max))
 983             (unless (re-search-backward marker nil t)
 984               (goto-char (point-min)))
 985             ;;(when (nnmail-search-unix-mail-delim)
 986             ;;  (goto-char (point-min)))
 987             )
 988
 989           ;; Keep track of the active number on our own, and insert it
 990           ;; back into the active list when we're done.  Also, prime
 991           ;; the pump to cut down on the number of searches we do.
 992           (unless (nnmail-search-unix-mail-delim)
 993             (goto-char (point-max)))
 994           (setq end (point-marker))
 995           (while (not (= end (point-max)))
 996             (setq start (marker-position end))
 997             (goto-char end)
 998            ;; There may be more than one "From " line, so we skip past
 999             ;; them.
1000             (while (looking-at delim)
1001               (forward-line 1))
1002             (set-marker end (if (nnmail-search-unix-mail-delim)
1003                                 (point)
1004                               (point-max)))
1005             (goto-char start)
1006             (when (not (search-forward marker end t))
1007               (narrow-to-region start end)
1008               (nnmail-insert-lines)
1009               (nnfolder-insert-newsgroup-line
1010                (cons nil
1011                      (setq newnum
1012                            (nnfolder-active-number group))))
1013               (when novbuf
1014                 (let ((headers (nnfolder-parse-head newnum (point-min)
1015                                                     (point-max))))
1016                   (with-current-buffer novbuf
1017                     (goto-char (point-max))
1018                     (nnheader-insert-nov headers))))
1019               (widen)))
1020
1021           (set-marker end nil)
1022           ;; Make absolutely sure that the active list reflects
1023           ;; reality!
1024           (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
1025
1026           ;; Set the scantime for this group.
1027           (setq newscantime (visited-file-modtime))
1028           (if scantime
1029               (setcdr scantime (list newscantime))
1030             (push (list group newscantime)
1031                   nnfolder-scantime-alist))
1032           ;; Save nov.
1033           (when novbuf
1034             (nnfolder-save-nov))
1035           (current-buffer))))))
1036
1037 ;;;###autoload
1038 (defun nnfolder-generate-active-file ()
1039   "Look for mbox folders in the nnfolder directory and make them into groups.
1040 This command does not work if you use short group names."
1041   (interactive)
1042   (nnmail-activate 'nnfolder)
1043   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1044     (dolist (file (directory-files (or nnfolder-nov-directory
1045                                        nnfolder-directory)
1046                                    t
1047                                    (concat
1048                                     (regexp-quote nnfolder-nov-file-suffix)
1049                                     "$")))
1050       (when (not (message-mail-file-mbox-p file))
1051         (ignore-errors
1052           (delete-file file)))))
1053     (dolist (file (directory-files nnfolder-directory))
1054       (when (and (not (backup-file-name-p file))
1055                  (message-mail-file-mbox-p
1056                   (nnheader-concat nnfolder-directory file)))
1057         (let ((oldgroup (assoc file nnfolder-group-alist)))
1058           (if oldgroup
1059               (nnheader-message 5 "Refreshing group %s..." file)
1060             (nnheader-message 5 "Adding group %s..." file))
1061           (if oldgroup
1062               (setq nnfolder-group-alist
1063                     (delq oldgroup (copy-sequence nnfolder-group-alist))))
1064           (push (list file (cons 1 0)) nnfolder-group-alist)
1065           (nnfolder-possibly-change-folder file)
1066           (nnfolder-possibly-change-group file)
1067           (nnfolder-close-group file))))
1068     (nnheader-message 5 ""))
1069
1070 (defun nnfolder-group-pathname (group)
1071   "Make file name for GROUP."
1072   (setq group
1073         (mm-encode-coding-string group nnmail-pathname-coding-system))
1074   (let ((dir (file-name-as-directory (expand-file-name nnfolder-directory))))
1075     ;; If this file exists, we use it directly.
1076     (if (or nnmail-use-long-file-names
1077             (file-exists-p (concat dir group)))
1078         (concat dir group)
1079       ;; If not, we translate dots into slashes.
1080       (concat dir (nnheader-replace-chars-in-string group ?. ?/)))))
1081
1082 (defun nnfolder-group-nov-pathname (group)
1083   "Make pathname for GROUP NOV."
1084   (let ((nnfolder-directory
1085          (or nnfolder-nov-directory nnfolder-directory)))
1086     (concat (nnfolder-group-pathname group) nnfolder-nov-file-suffix)))
1087
1088 (defun nnfolder-save-buffer ()
1089   "Save the buffer."
1090   (when (buffer-modified-p)
1091     (run-hooks 'nnfolder-save-buffer-hook)
1092     (gnus-make-directory (file-name-directory (buffer-file-name)))
1093     (let ((coding-system-for-write
1094            (or nnfolder-file-coding-system-for-write
1095                nnfolder-file-coding-system))
1096           (copyright-update nil))
1097       (save-buffer)))
1098   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1099     (nnfolder-save-nov)))
1100
1101 (defun nnfolder-save-active (group-alist active-file)
1102   (let ((nnmail-active-file-coding-system
1103          (or nnfolder-active-file-coding-system-for-write
1104              nnfolder-active-file-coding-system)))
1105     (nnmail-save-active group-alist active-file)))
1106
1107 (defun nnfolder-open-nov (group)
1108   (or (cdr (assoc group nnfolder-nov-buffer-alist))
1109       (let ((buffer (get-buffer-create (format " *nnfolder overview %s*" group))))
1110         (save-excursion
1111           (set-buffer buffer)
1112           (set (make-local-variable 'nnfolder-nov-buffer-file-name)
1113                (nnfolder-group-nov-pathname group))
1114           (erase-buffer)
1115           (when (file-exists-p nnfolder-nov-buffer-file-name)
1116             (nnheader-insert-file-contents nnfolder-nov-buffer-file-name)))
1117         (push (cons group buffer) nnfolder-nov-buffer-alist)
1118         buffer)))
1119
1120 (defun nnfolder-save-nov ()
1121   (save-excursion
1122     (while nnfolder-nov-buffer-alist
1123       (when (buffer-name (cdar nnfolder-nov-buffer-alist))
1124         (set-buffer (cdar nnfolder-nov-buffer-alist))
1125         (when (buffer-modified-p)
1126           (gnus-make-directory (file-name-directory
1127                                 nnfolder-nov-buffer-file-name))
1128           (nnmail-write-region 1 (point-max) nnfolder-nov-buffer-file-name
1129                                nil 'nomesg))
1130         (set-buffer-modified-p nil)
1131         (kill-buffer (current-buffer)))
1132       (setq nnfolder-nov-buffer-alist (cdr nnfolder-nov-buffer-alist)))))
1133
1134 (defun nnfolder-nov-delete-article (group article)
1135   (save-excursion
1136     (set-buffer (nnfolder-open-nov group))
1137     (when (nnheader-find-nov-line article)
1138       (delete-region (point) (progn (forward-line 1) (point))))
1139     t))
1140
1141 (defun nnfolder-retrieve-headers-with-nov (articles &optional fetch-old)
1142   (if (or gnus-nov-is-evil nnfolder-nov-is-evil)
1143       nil
1144     (let ((nov (nnfolder-group-nov-pathname nnfolder-current-group)))
1145       (when (file-exists-p nov)
1146         (save-excursion
1147           (set-buffer nntp-server-buffer)
1148           (erase-buffer)
1149           (nnheader-insert-file-contents nov)
1150           (if (and fetch-old
1151                    (not (numberp fetch-old)))
1152               t                         ; Don't remove anything.
1153             (nnheader-nov-delete-outside-range
1154              (if fetch-old (max 1 (- (car articles) fetch-old))
1155                (car articles))
1156              (car (last articles)))
1157             t))))))
1158
1159 (defun nnfolder-parse-head (&optional number b e)
1160   "Parse the head of the current buffer."
1161   (let ((buf (current-buffer))
1162         chars)
1163     (save-excursion
1164       (unless b
1165         (setq b (if (nnmail-search-unix-mail-delim-backward)
1166                     (point) (point-min)))
1167         (forward-line 1)
1168         (setq e (if (nnmail-search-unix-mail-delim)
1169                     (point) (point-max))))
1170       (setq chars (- e b))
1171       (unless (zerop chars)
1172         (goto-char b)
1173         (if (search-forward "\n\n" e t) (setq e (1- (point)))))
1174       (with-temp-buffer
1175         (insert-buffer-substring buf b e)
1176         (let ((headers (nnheader-parse-naked-head)))
1177           (mail-header-set-chars headers chars)
1178           (mail-header-set-number headers number)
1179           headers)))))
1180
1181 (defun nnfolder-add-nov (group article headers)
1182   "Add a nov line for the GROUP base."
1183   (save-excursion
1184     (set-buffer (nnfolder-open-nov group))
1185     (goto-char (point-max))
1186     (mail-header-set-number headers article)
1187     (nnheader-insert-nov headers)))
1188
1189 (deffoo nnfolder-request-set-mark (group actions &optional server)
1190   (when (and server
1191              (not (nnfolder-server-opened server)))
1192     (nnfolder-open-server server))
1193   (unless nnfolder-marks-is-evil
1194     (nnfolder-open-marks group server)
1195     (dolist (action actions)
1196       (let ((range (nth 0 action))
1197             (what  (nth 1 action))
1198             (marks (nth 2 action)))
1199         (assert (or (eq what 'add) (eq what 'del)) nil
1200                 "Unknown request-set-mark action: %s" what)
1201         (dolist (mark marks)
1202           (setq nnfolder-marks (gnus-update-alist-soft
1203                             mark
1204                             (funcall (if (eq what 'add) 'gnus-range-add
1205                                        'gnus-remove-from-range)
1206                                      (cdr (assoc mark nnfolder-marks)) range)
1207                             nnfolder-marks)))))
1208     (nnfolder-save-marks group server))
1209   nil)
1210
1211 (deffoo nnfolder-request-update-info (group info &optional server)
1212   ;; Change servers.
1213   (when (and server
1214              (not (nnfolder-server-opened server)))
1215     (nnfolder-open-server server))
1216   (when (and (not nnfolder-marks-is-evil) (nnfolder-marks-changed-p group))
1217     (nnheader-message 8 "Updating marks for %s..." group)
1218     (nnfolder-open-marks group server)
1219     ;; Update info using `nnfolder-marks'.
1220     (mapc (lambda (pred)
1221             (unless (memq (cdr pred) gnus-article-unpropagated-mark-lists)
1222               (gnus-info-set-marks
1223                info
1224                (gnus-update-alist-soft
1225                 (cdr pred)
1226                 (cdr (assq (cdr pred) nnfolder-marks))
1227                 (gnus-info-marks info))
1228                t)))
1229           gnus-article-mark-lists)
1230     (let ((seen (cdr (assq 'read nnfolder-marks))))
1231       (gnus-info-set-read info
1232                           (if (and (integerp (car seen))
1233                                    (null (cdr seen)))
1234                               (list (cons (car seen) (car seen)))
1235                             seen)))
1236     (nnheader-message 8 "Updating marks for %s...done" group))
1237   info)
1238
1239 (defun nnfolder-group-marks-pathname (group)
1240   "Make pathname for GROUP NOV."
1241   (let ((nnfolder-directory (or nnfolder-marks-directory nnfolder-directory)))
1242     (concat (nnfolder-group-pathname group) nnfolder-marks-file-suffix)))
1243
1244 (defun nnfolder-marks-changed-p (group)
1245   (let ((file (nnfolder-group-marks-pathname group)))
1246     (if (null (gnus-gethash file nnfolder-marks-modtime))
1247         t ;; never looked at marks file, assume it has changed
1248       (not (equal (gnus-gethash file nnfolder-marks-modtime)
1249                   (nth 5 (file-attributes file)))))))
1250
1251 (defun nnfolder-save-marks (group server)
1252   (let ((file-name-coding-system nnmail-pathname-coding-system)
1253         (file (nnfolder-group-marks-pathname group)))
1254     (condition-case err
1255         (progn
1256           (with-temp-file file
1257             (erase-buffer)
1258             (gnus-prin1 nnfolder-marks)
1259             (insert "\n"))
1260           (gnus-sethash file
1261                         (nth 5 (file-attributes file))
1262                         nnfolder-marks-modtime))
1263       (error (or (gnus-yes-or-no-p
1264                   (format "Could not write to %s (%s).  Continue? " file err))
1265                  (error "Cannot write to %s (%s)" file err))))))
1266
1267 (defun nnfolder-open-marks (group server)
1268   (let ((file (nnfolder-group-marks-pathname group)))
1269     (if (file-exists-p file)
1270         (condition-case err
1271             (with-temp-buffer
1272               (gnus-sethash file (nth 5 (file-attributes file))
1273                             nnfolder-marks-modtime)
1274               (nnheader-insert-file-contents file)
1275               (setq nnfolder-marks (read (current-buffer)))
1276               (dolist (el gnus-article-unpropagated-mark-lists)
1277                 (setq nnfolder-marks (gnus-remassoc el nnfolder-marks))))
1278           (error (or (gnus-yes-or-no-p
1279                       (format "Error reading nnfolder marks file %s (%s).  Continuing will use marks from .newsrc.eld.  Continue? " file err))
1280                      (error "Cannot read nnfolder marks file %s (%s)" file err))))
1281       ;; User didn't have a .marks file.  Probably first time
1282       ;; user of the .marks stuff.  Bootstrap it from .newsrc.eld.
1283       (let ((info (gnus-get-info
1284                    (gnus-group-prefixed-name
1285                     group
1286                     (gnus-server-to-method (format "nnfolder:%s" server))))))
1287         (nnheader-message 7 "Bootstrapping marks for %s..." group)
1288         (setq nnfolder-marks (gnus-info-marks info))
1289         (push (cons 'read (gnus-info-read info)) nnfolder-marks)
1290         (dolist (el gnus-article-unpropagated-mark-lists)
1291           (setq nnfolder-marks (gnus-remassoc el nnfolder-marks)))
1292         (nnfolder-save-marks group server)
1293         (nnheader-message 7 "Bootstrapping marks for %s...done" group)))))
1294
1295 (provide 'nnfolder)
1296
1297 ;;; arch-tag: a040d0f4-4f4e-445f-8972-839575c5f7e6
1298 ;;; nnfolder.el ends here