lisp/gnus/nnfolder.el

   1 ;;; nnfolder.el --- mail folder access for Gnus
   2
   3 ;; Copyright (C) 1995-2011 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 3 of the License, or
  17 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  26
  27 ;;; Commentary:
  28
  29 ;;; Code:
  30
  31 ;; For Emacs <22.2 and XEmacs.
  32 (eval-and-compile
  33   (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
  34
  35 (require 'nnheader)
  36 (require 'message)
  37 (require 'nnmail)
  38 (require 'nnoo)
  39 (eval-when-compile (require 'cl))
  40 (require 'gnus)
  41 (require 'gnus-util)
  42 (require 'gnus-range)
  43
  44 ;; FIXME not explicitly used in this file.
  45 (autoload 'gnus-article-unpropagatable-p "gnus-sum")
  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   (with-current-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) (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) (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   (with-current-buffer nnfolder-current-buffer
 263     (goto-char (point-min))
 264     (when (nnfolder-goto-article article)
 265       (let (start stop)
 266         (setq start (point))
 267         (forward-line 1)
 268         (unless (and (nnmail-search-unix-mail-delim)
 269                      (forward-line -1))
 270           (goto-char (point-max)))
 271         (setq stop (point))
 272         (let ((nntp-server-buffer (or buffer nntp-server-buffer)))
 273           (set-buffer nntp-server-buffer)
 274           (erase-buffer)
 275           (insert-buffer-substring nnfolder-current-buffer start stop)
 276           (goto-char (point-min))
 277           (while (looking-at "From ")
 278             (delete-char 5)
 279             (insert "X-From-Line: ")
 280             (forward-line 1))
 281           (if (numberp article)
 282               (cons nnfolder-current-group article)
 283             (goto-char (point-min))
 284             (cons nnfolder-current-group
 285                   (if (search-forward (concat "\n" nnfolder-article-marker)
 286                                       nil t)
 287                       (string-to-number (buffer-substring
 288                                       (point) (point-at-eol)))
 289                     -1))))))))
 290
 291 (deffoo nnfolder-request-group (group &optional server dont-check info)
 292   (nnfolder-possibly-change-group group server t)
 293   (save-excursion
 294     (cond ((not (assoc group nnfolder-group-alist))
 295            (nnheader-report 'nnfolder "No such group: %s" group))
 296           ((file-directory-p (nnfolder-group-pathname group))
 297            (nnheader-report 'nnfolder "%s is a directory"
 298                             (file-name-as-directory
 299                              (let ((nnmail-pathname-coding-system nil))
 300                                (nnfolder-group-pathname group)))))
 301           (dont-check
 302            (nnheader-report 'nnfolder "Selected group %s" group)
 303            t)
 304           (t
 305            (let* ((active (assoc group nnfolder-group-alist))
 306                   (group (car active))
 307                   (range (cadr active)))
 308              (cond
 309               ((null active)
 310                (nnheader-report 'nnfolder "No such group: %s" group))
 311               ((null nnfolder-current-group)
 312                (nnheader-report 'nnfolder "Empty group: %s" group))
 313               (t
 314                (nnheader-report 'nnfolder "Selected group %s" group)
 315                (nnheader-insert "211 %d %d %d %s\n"
 316                                 (1+ (- (cdr range) (car range)))
 317                                 (car range) (cdr range) group))))))))
 318
 319 (deffoo nnfolder-request-scan (&optional group server)
 320   (nnfolder-possibly-change-group nil server)
 321   (when nnfolder-get-new-mail
 322     (nnfolder-possibly-change-group group server)
 323     (nnmail-get-new-mail
 324      'nnfolder 'nnfolder-save-all-buffers
 325      nnfolder-directory group)))
 326
 327 (defun nnfolder-save-all-buffers ()
 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
 339 ;; Don't close the buffer if we're not shutting down the server.  This way,
 340 ;; we can keep the buffer in the group buffer cache, and not have to grovel
 341 ;; over the buffer again unless we add new mail to it or modify it in some
 342 ;; way.
 343
 344 (deffoo nnfolder-close-group (group &optional server force)
 345   ;; Make sure we _had_ the group open.
 346   (when (or (assoc group nnfolder-buffer-alist)
 347             (equal group nnfolder-current-group))
 348     (let ((inf (assoc group nnfolder-buffer-alist)))
 349       (when inf
 350         (when (and nnfolder-current-group
 351                    nnfolder-current-buffer)
 352           (push (list nnfolder-current-group nnfolder-current-buffer)
 353                 nnfolder-buffer-alist))
 354         (setq nnfolder-buffer-alist
 355               (delq inf nnfolder-buffer-alist))
 356         (setq nnfolder-current-buffer (cadr inf)
 357               nnfolder-current-group (car inf))))
 358     (when (and nnfolder-current-buffer
 359                (buffer-name nnfolder-current-buffer))
 360       (with-current-buffer nnfolder-current-buffer
 361         ;; If the buffer was modified, write the file out now.
 362         (nnfolder-save-buffer)
 363         ;; If we're shutting the server down, we need to kill the
 364         ;; buffer and remove it from the open buffer list.  Or, of
 365         ;; course, if we're trying to minimize our space impact.
 366         (kill-buffer (current-buffer))
 367         (setq nnfolder-buffer-alist (delq (assoc group nnfolder-buffer-alist)
 368                                           nnfolder-buffer-alist)))))
 369   (setq nnfolder-current-group nil
 370         nnfolder-current-buffer nil)
 371   t)
 372
 373 (deffoo nnfolder-request-create-group (group &optional server args)
 374   (nnfolder-possibly-change-group nil server)
 375   (nnmail-activate 'nnfolder)
 376   (cond ((zerop (length group))
 377          (nnheader-report 'nnfolder "Invalid (empty) group name"))
 378         ((file-directory-p (nnfolder-group-pathname group))
 379          (nnheader-report 'nnfolder "%s is a directory"
 380                           (file-name-as-directory
 381                            (let ((nnmail-pathname-coding-system nil))
 382                              (nnfolder-group-pathname group)))))
 383         ((assoc group nnfolder-group-alist)
 384          t)
 385         (t
 386          (push (list group (cons 1 0)) nnfolder-group-alist)
 387          (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 388          (save-current-buffer
 389            (nnfolder-read-folder group))
 390          t)))
 391
 392 (deffoo nnfolder-request-list (&optional server)
 393   (nnfolder-possibly-change-group nil server)
 394   (save-excursion
 395     (let ((nnmail-file-coding-system nnfolder-active-file-coding-system))
 396       (nnmail-find-file nnfolder-active-file)
 397       (setq nnfolder-group-alist (nnmail-get-active)))
 398     t))
 399
 400 (deffoo nnfolder-request-newgroups (date &optional server)
 401   (nnfolder-possibly-change-group nil server)
 402   (nnfolder-request-list server))
 403
 404 (deffoo nnfolder-request-list-newsgroups (&optional server)
 405   (nnfolder-possibly-change-group nil server)
 406   (save-excursion
 407     (let ((nnmail-file-coding-system nnfolder-file-coding-system))
 408       (nnmail-find-file nnfolder-newsgroups-file))))
 409
 410 ;; Return a list consisting of all article numbers existing in the
 411 ;; current folder.
 412
 413 (defun nnfolder-existing-articles ()
 414   (save-excursion
 415     (when nnfolder-current-buffer
 416       (set-buffer nnfolder-current-buffer)
 417       (goto-char (point-min))
 418       (let ((marker (concat "\n" nnfolder-article-marker))
 419             (number "[0-9]+")
 420             numbers)
 421         (while (and (search-forward marker nil t)
 422                     (re-search-forward number nil t))
 423           (let ((newnum (string-to-number (match-string 0))))
 424             (if (nnmail-within-headers-p)
 425                 (push newnum numbers))))
 426       ;; The article numbers are increasing, so this result is sorted.
 427         (nreverse numbers)))))
 428
 429 (autoload 'gnus-request-group "gnus-int")
 430 (declare-function gnus-request-create-group "gnus-int"
 431                   (group &optional gnus-command-method args))
 432
 433 (deffoo nnfolder-request-expire-articles (articles newsgroup
 434                                                    &optional server force)
 435   (nnfolder-possibly-change-group newsgroup server)
 436   (let ((is-old t)
 437         ;; The articles we have deleted so far.
 438         (deleted-articles nil)
 439         ;; The articles that really exist and will
 440         ;; be expired if they are old enough.
 441         (maybe-expirable
 442          (gnus-sorted-intersection articles (nnfolder-existing-articles)))
 443         target)
 444     (nnmail-activate 'nnfolder)
 445
 446     (with-current-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                   (when (and target (not (eq target 'delete)))
 471                     (if (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       (nnfolder-save-all-buffers)
 491       (gnus-sorted-difference articles (nreverse deleted-articles)))))
 492
 493 (deffoo nnfolder-request-move-article (article group server accept-form
 494                                                &optional last move-is-internal)
 495   (save-excursion
 496     (let ((buf (get-buffer-create " *nnfolder move*"))
 497           result)
 498       (and
 499        (nnfolder-request-article article group server)
 500        (with-current-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   (with-current-buffer buffer
 577     (goto-char (point-min))
 578     (if (not (looking-at "X-From-Line: "))
 579         (insert "From nobody " (current-time-string) "\n")
 580       (replace-match "From ")
 581       (forward-line 1)
 582       (while (looking-at "[ \t]")
 583         (delete-char -1)
 584         (forward-line 1)))
 585     (nnfolder-normalize-buffer)
 586     (set-buffer nnfolder-current-buffer)
 587     (goto-char (point-min))
 588     (if (not (nnfolder-goto-article article))
 589         nil
 590       (nnfolder-delete-mail)
 591       (insert-buffer-substring buffer)
 592       (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 593         (with-current-buffer buffer
 594           (let ((headers (nnfolder-parse-head article
 595                                               (point-min) (point-max))))
 596             (with-current-buffer (nnfolder-open-nov group)
 597               (if (nnheader-find-nov-line article)
 598                   (delete-region (point) (progn (forward-line 1) (point))))
 599               (nnheader-insert-nov headers)))))
 600       (nnfolder-save-buffer)
 601       t)))
 602
 603 (deffoo nnfolder-request-delete-group (group &optional force server)
 604   (nnfolder-close-group group server t)
 605   ;; Delete all articles in GROUP.
 606   (if (not force)
 607       ()                                ; Don't delete the articles.
 608     ;; Delete the file that holds the group.
 609     (let ((data (nnfolder-group-pathname group))
 610           (nov (nnfolder-group-nov-pathname group))
 611           (mrk (nnfolder-group-marks-pathname group)))
 612       (ignore-errors (delete-file data))
 613       (ignore-errors (delete-file nov))
 614       (ignore-errors (delete-file mrk))))
 615   ;; Remove the group from all structures.
 616   (setq nnfolder-group-alist
 617         (delq (assoc group nnfolder-group-alist) nnfolder-group-alist)
 618         nnfolder-current-group nil
 619         nnfolder-current-buffer nil)
 620   ;; Save the active file.
 621   (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 622   t)
 623
 624 (deffoo nnfolder-request-rename-group (group new-name &optional server)
 625   (nnfolder-possibly-change-group group server)
 626   (with-current-buffer nnfolder-current-buffer
 627     (and (file-writable-p buffer-file-name)
 628          (ignore-errors
 629            (let ((new-file (nnfolder-group-pathname new-name)))
 630              (gnus-make-directory (file-name-directory new-file))
 631              (rename-file buffer-file-name new-file)
 632              (when (file-exists-p (nnfolder-group-nov-pathname group))
 633                (setq new-file (nnfolder-group-nov-pathname new-name))
 634                (gnus-make-directory (file-name-directory new-file))
 635                (rename-file (nnfolder-group-nov-pathname group) new-file))
 636              (when (file-exists-p (nnfolder-group-marks-pathname group))
 637                (setq new-file (nnfolder-group-marks-pathname new-name))
 638                (gnus-make-directory (file-name-directory new-file))
 639                (rename-file (nnfolder-group-marks-pathname group) new-file)))
 640            t)
 641          ;; That went ok, so we change the internal structures.
 642          (let ((entry (assoc group nnfolder-group-alist)))
 643            (and entry (setcar entry new-name))
 644            (setq nnfolder-current-buffer nil
 645                  nnfolder-current-group nil)
 646            ;; Save the new group alist.
 647            (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 648            ;; We kill the buffer instead of renaming it and stuff.
 649            (kill-buffer (current-buffer))
 650            t))))
 651
 652 (deffoo nnfolder-request-regenerate (server)
 653   (nnfolder-possibly-change-group nil server)
 654   (nnfolder-generate-active-file)
 655   t)
 656
 657 \f
 658 ;;; Internal functions.
 659
 660 (defun nnfolder-adjust-min-active (group)
 661   ;; Find the lowest active article in this group.
 662   (let* ((active (cadr (assoc group nnfolder-group-alist)))
 663          (marker (concat "\n" nnfolder-article-marker))
 664          (number "[0-9]+")
 665          (activemin (cdr active)))
 666     (with-current-buffer nnfolder-current-buffer
 667       (goto-char (point-min))
 668       (while (and (search-forward marker nil t)
 669                   (re-search-forward number nil t))
 670         (let ((newnum (string-to-number (match-string 0))))
 671           (if (nnmail-within-headers-p)
 672               (setq activemin (min activemin newnum)))))
 673       (setcar active activemin))))
 674
 675 (defun nnfolder-article-string (article)
 676   (if (numberp article)
 677       (concat "\n" nnfolder-article-marker (int-to-string article) " ")
 678     (concat "\nMessage-ID: " article)))
 679
 680 (defun nnfolder-goto-article (article)
 681   "Place point at the start of the headers of ARTICLE.
 682 ARTICLE can be an article number or a Message-ID.
 683 Returns t if successful, nil otherwise."
 684   (let ((art-string (nnfolder-article-string article))
 685         start found)
 686     ;; It is likely that we are at or before the delimiter line.
 687     ;; We therefore go to the end of the previous line, and start
 688     ;; searching from there.
 689     (beginning-of-line)
 690     (unless (bobp)
 691       (forward-char -1))
 692     (setq start (point))
 693     ;; First search forward.
 694     (while (and (setq found (search-forward art-string nil t))
 695                 (not (nnmail-within-headers-p))))
 696     ;; If unsuccessful, search backward from where we started,
 697     (unless found
 698       (goto-char start)
 699       (while (and (setq found (search-backward art-string nil t))
 700                   (not (nnmail-within-headers-p)))))
 701     (when found
 702       (nnmail-search-unix-mail-delim-backward))))
 703
 704 (defun nnfolder-delete-mail (&optional leave-delim)
 705   "Delete the message that point is in.
 706 If optional argument LEAVE-DELIM is t, then mailbox delimiter is not
 707 deleted.  Point is left where the deleted region was."
 708   (save-restriction
 709     (narrow-to-region
 710      (save-excursion
 711        ;; In case point is at the beginning of the message already.
 712        (forward-line 1)
 713        (nnmail-search-unix-mail-delim-backward)
 714        (if leave-delim (progn (forward-line 1) (point))
 715          (point)))
 716      (progn
 717        (forward-line 1)
 718        (if (nnmail-search-unix-mail-delim)
 719            (point)
 720          (point-max))))
 721     (run-hooks 'nnfolder-delete-mail-hook)
 722     (delete-region (point-min) (point-max))))
 723
 724 (defun nnfolder-possibly-change-group (group &optional server dont-check)
 725   ;; Change servers.
 726   (when (and server
 727              (not (nnfolder-server-opened server)))
 728     (nnfolder-open-server server))
 729   (unless (gnus-buffer-live-p nnfolder-current-buffer)
 730     (setq nnfolder-current-buffer nil
 731           nnfolder-current-group nil))
 732   ;; Change group.
 733   (let ((file-name-coding-system nnmail-pathname-coding-system))
 734     (when (and group
 735                (not (equal group nnfolder-current-group))
 736                (progn
 737                  (nnmail-activate 'nnfolder)
 738                  (and (assoc group nnfolder-group-alist)
 739                       (file-exists-p (nnfolder-group-pathname group)))))
 740       (if dont-check
 741           (setq nnfolder-current-group group
 742                 nnfolder-current-buffer nil)
 743         (let (inf file)
 744           ;; If we have to change groups, see if we don't already have
 745           ;; the folder in memory.  If we do, verify the modtime and
 746           ;; destroy the folder if needed so we can rescan it.
 747           (setq nnfolder-current-buffer
 748                 (nth 1 (assoc group nnfolder-buffer-alist)))
 749
 750           ;; If the buffer is not live, make sure it isn't in the
 751           ;; alist.  If it is live, verify that nobody else has
 752           ;; touched the file since last time.
 753           (when (and nnfolder-current-buffer
 754                      (not (gnus-buffer-live-p nnfolder-current-buffer)))
 755             (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)
 756                   nnfolder-current-buffer nil))
 757
 758           (setq nnfolder-current-group group)
 759
 760           (when (or (not nnfolder-current-buffer)
 761                     (not (verify-visited-file-modtime
 762                           nnfolder-current-buffer)))
 763             (save-excursion
 764               (setq file (nnfolder-group-pathname group))
 765               ;; See whether we need to create the new file.
 766               (unless (file-exists-p file)
 767                 (gnus-make-directory (file-name-directory file))
 768                 (let ((nnmail-file-coding-system
 769                        (or nnfolder-file-coding-system-for-write
 770                            nnfolder-file-coding-system-for-write)))
 771                   (nnmail-write-region (point-min) (point-min)
 772                                        file t 'nomesg)))
 773               (when (setq nnfolder-current-buffer (nnfolder-read-folder group))
 774                 (set-buffer nnfolder-current-buffer)
 775                 (push (list group nnfolder-current-buffer)
 776                       nnfolder-buffer-alist)))))))))
 777
 778 (defun nnfolder-save-mail (group-art-list)
 779   "Called narrowed to an article."
 780   (let* (save-list group-art)
 781     (goto-char (point-min))
 782     ;; The From line may have been quoted by movemail.
 783     (when (looking-at ">From")
 784       (delete-char 1))
 785     ;; This might come from somewhere else.
 786     (unless (looking-at "From ")
 787       (insert "From nobody " (current-time-string) "\n")
 788       (goto-char (point-min)))
 789     ;; Quote all "From " lines in the article.
 790     (forward-line 1)
 791     (let (case-fold-search)
 792       (while (re-search-forward "^From " nil t)
 793         (beginning-of-line)
 794         (insert "> ")))
 795     (setq save-list group-art-list)
 796     (nnmail-insert-lines)
 797     (nnmail-insert-xref group-art-list)
 798     (run-hooks 'nnmail-prepare-save-mail-hook)
 799     (run-hooks 'nnfolder-prepare-save-mail-hook)
 800
 801     ;; Insert the mail into each of the destination groups.
 802     (while (setq group-art (pop group-art-list))
 803       ;; Kill any previous newsgroup markers.
 804       (goto-char (point-min))
 805       (if (search-forward "\n\n" nil t)
 806           (forward-line -1)
 807         (goto-char (point-max)))
 808       (while (search-backward (concat "\n" nnfolder-article-marker) nil t)
 809         (delete-region (1+ (point)) (progn (forward-line 2) (point))))
 810
 811       ;; Insert the new newsgroup marker.
 812       (nnfolder-insert-newsgroup-line group-art)
 813
 814       (save-excursion
 815         (let ((beg (point-min))
 816               (end (point-max))
 817               (obuf (current-buffer)))
 818           (nnfolder-possibly-change-folder (car group-art))
 819           (let ((buffer-read-only nil))
 820             (nnfolder-normalize-buffer)
 821             (insert-buffer-substring obuf beg end))
 822           (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 823             (set-buffer obuf)
 824             (nnfolder-add-nov (car group-art) (cdr group-art)
 825                               (nnfolder-parse-head nil beg end))))))
 826
 827     ;; Did we save it anywhere?
 828     save-list))
 829
 830 (defun nnfolder-normalize-buffer ()
 831   "Make sure there are two newlines at the end of the buffer."
 832   (goto-char (point-max))
 833   (skip-chars-backward "\n")
 834   (delete-region (point) (point-max))
 835   (unless (bobp)
 836     (insert "\n\n")))
 837
 838 (defun nnfolder-insert-newsgroup-line (group-art)
 839   (save-excursion
 840     (goto-char (point-min))
 841     (unless (search-forward "\n\n" nil t)
 842       (goto-char (point-max))
 843       (insert "\n"))
 844     (forward-char -1)
 845     (insert (format (concat nnfolder-article-marker "%d   %s\n")
 846                     (cdr group-art) (message-make-date)))))
 847
 848 (defun nnfolder-active-number (group)
 849   ;; Find the next article number in GROUP.
 850   (let ((active (cadr (assoc group nnfolder-group-alist))))
 851     (if active
 852         (setcdr active (1+ (cdr active)))
 853       ;; This group is new, so we create a new entry for it.
 854       ;; This might be a bit naughty... creating groups on the drop of
 855       ;; a hat, but I don't know...
 856       (push (list group (setq active (cons 1 1)))
 857             nnfolder-group-alist))
 858     (cdr active)))
 859
 860 (defun nnfolder-possibly-change-folder (group)
 861   (let ((inf (assoc group nnfolder-buffer-alist)))
 862     (if (and inf
 863              (gnus-buffer-live-p (cadr inf)))
 864         (set-buffer (cadr inf))
 865       (when inf
 866         (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)))
 867       (when nnfolder-group-alist
 868         (nnfolder-save-active nnfolder-group-alist nnfolder-active-file))
 869       (push (list group (nnfolder-read-folder group))
 870             nnfolder-buffer-alist))))
 871
 872 ;; This method has a problem if you've accidentally let the active
 873 ;; list get out of sync with the files.  This could happen, say, if
 874 ;; you've accidentally gotten new mail with something other than Gnus
 875 ;; (but why would _that_ ever happen? :-).  In that case, we will be
 876 ;; in the middle of processing the file, ready to add new X-Gnus
 877 ;; article number markers, and we'll run across a message with no ID
 878 ;; yet - the active list _may_not_ be ready for us yet.
 879
 880 ;; To handle this, I'm modifying this routine to maintain the maximum
 881 ;; ID seen so far, and when we hit a message with no ID, we will
 882 ;; _manually_ scan the rest of the message looking for any more,
 883 ;; possibly higher IDs.  We'll assume the maximum that we find is the
 884 ;; highest active.  Note that this shouldn't cost us much extra time
 885 ;; at all, but will be a lot less vulnerable to glitches between the
 886 ;; mbox and the active file.
 887
 888 (defun nnfolder-read-folder (group)
 889   (let* ((file (nnfolder-group-pathname group))
 890          (nov  (nnfolder-group-nov-pathname group))
 891          (buffer (set-buffer
 892                   (let ((nnheader-file-coding-system
 893                          nnfolder-file-coding-system))
 894                     (nnheader-find-file-noselect file t)))))
 895     (mm-enable-multibyte) ;; Use multibyte buffer for future copying.
 896     (buffer-disable-undo)
 897     (if (equal (cadr (assoc group nnfolder-scantime-alist))
 898                (nth 5 (file-attributes file)))
 899         ;; This looks up-to-date, so we don't do any scanning.
 900         (if (file-exists-p file)
 901             buffer
 902           (push (list group buffer) nnfolder-buffer-alist)
 903           (set-buffer-modified-p t)
 904           (nnfolder-save-buffer))
 905       ;; Parse the damn thing.
 906       (save-excursion
 907         (goto-char (point-min))
 908         ;; Remove any blank lines at the start.
 909         (while (eq (following-char) ?\n)
 910           (delete-char 1))
 911         (nnmail-activate 'nnfolder)
 912         ;; Read in the file.
 913         (let ((delim "^From ")
 914               (marker (concat "\n" nnfolder-article-marker))
 915               (number "[0-9]+")
 916               (active (or (cadr (assoc group nnfolder-group-alist))
 917                           (cons 1 0)))
 918               (scantime (assoc group nnfolder-scantime-alist))
 919               (minid (or (and (boundp 'most-positive-fixnum)
 920                               most-positive-fixnum)
 921                          (lsh -1 -1)))
 922               maxid start end newscantime
 923               novbuf articles newnum
 924               buffer-read-only)
 925           (setq maxid (cdr active))
 926
 927           (unless (or gnus-nov-is-evil nnfolder-nov-is-evil
 928                       (and (file-exists-p nov)
 929                            (file-newer-than-file-p nov file)))
 930             (unless (file-exists-p nov)
 931               (gnus-make-directory (file-name-directory nov)))
 932             (with-current-buffer
 933                 (setq novbuf (nnfolder-open-nov group))
 934               (goto-char (point-min))
 935               (while (not (eobp))
 936                 (push (read novbuf) articles)
 937                 (forward-line 1))
 938               (setq articles (nreverse articles))))
 939           (goto-char (point-min))
 940
 941           ;; Anytime the active number is 1 or 0, it is suspect.  In
 942           ;; that case, search the file manually to find the active
 943           ;; number.  Or, of course, if we're being paranoid.  (This
 944           ;; would also be the place to build other lists from the
 945           ;; header markers, such as expunge lists, etc., if we ever
 946           ;; desired to abandon the active file entirely for mboxes.)
 947           (when (or nnfolder-ignore-active-file
 948                     novbuf
 949                     (< maxid 2))
 950             (while (and (search-forward marker nil t)
 951                         (looking-at number))
 952               (setq newnum (string-to-number (match-string 0)))
 953               (when (nnmail-within-headers-p)
 954                 (setq maxid (max maxid newnum)
 955                       minid (min minid newnum))
 956                 (when novbuf
 957                   (if (memq newnum articles)
 958                       (setq articles (delq newnum articles))
 959                     (let ((headers (nnfolder-parse-head newnum)))
 960                       (with-current-buffer novbuf
 961                         (nnheader-find-nov-line newnum)
 962                         (nnheader-insert-nov headers)))))))
 963             (when (and novbuf articles)
 964               (with-current-buffer novbuf
 965                 (dolist (article articles)
 966                   (when (nnheader-find-nov-line article)
 967                     (delete-region (point)
 968                                    (progn (forward-line 1) (point)))))))
 969             (setcar active (max 1 (min minid maxid)))
 970             (setcdr active (max maxid (cdr active)))
 971             (goto-char (point-min)))
 972
 973           ;; As long as we trust that the user will only insert
 974           ;; unmarked mail at the end, go to the end and search
 975           ;; backwards for the last marker.  Find the start of that
 976           ;; message, and begin to search for unmarked messages from
 977           ;; there.
 978           (when (not (or nnfolder-distrust-mbox
 979                          (< maxid 2)))
 980             (goto-char (point-max))
 981             (unless (re-search-backward marker nil t)
 982               (goto-char (point-min)))
 983             ;;(when (nnmail-search-unix-mail-delim)
 984             ;;  (goto-char (point-min)))
 985             )
 986
 987           ;; Keep track of the active number on our own, and insert it
 988           ;; back into the active list when we're done.  Also, prime
 989           ;; the pump to cut down on the number of searches we do.
 990           (unless (nnmail-search-unix-mail-delim)
 991             (goto-char (point-max)))
 992           (setq end (point-marker))
 993           (while (not (= end (point-max)))
 994             (setq start (marker-position end))
 995             (goto-char end)
 996            ;; There may be more than one "From " line, so we skip past
 997             ;; them.
 998             (while (looking-at delim)
 999               (forward-line 1))
1000             (set-marker end (if (nnmail-search-unix-mail-delim)
1001                                 (point)
1002                               (point-max)))
1003             (goto-char start)
1004             (when (not (search-forward marker end t))
1005               (narrow-to-region start end)
1006               (nnmail-insert-lines)
1007               (nnfolder-insert-newsgroup-line
1008                (cons nil
1009                      (setq newnum
1010                            (nnfolder-active-number group))))
1011               (when novbuf
1012                 (let ((headers (nnfolder-parse-head newnum (point-min)
1013                                                     (point-max))))
1014                   (with-current-buffer novbuf
1015                     (goto-char (point-max))
1016                     (nnheader-insert-nov headers))))
1017               (widen)))
1018
1019           (set-marker end nil)
1020           ;; Make absolutely sure that the active list reflects
1021           ;; reality!
1022           (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
1023
1024           ;; Set the scantime for this group.
1025           (setq newscantime (visited-file-modtime))
1026           (if scantime
1027               (setcdr scantime (list newscantime))
1028             (push (list group newscantime)
1029                   nnfolder-scantime-alist))
1030           ;; Save nov.
1031           (when novbuf
1032             (nnfolder-save-nov))
1033           (current-buffer))))))
1034
1035 ;;;###autoload
1036 (defun nnfolder-generate-active-file ()
1037   "Look for mbox folders in the nnfolder directory and make them into groups.
1038 This command does not work if you use short group names."
1039   (interactive)
1040   (nnmail-activate 'nnfolder)
1041   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1042     (dolist (file (directory-files (or nnfolder-nov-directory
1043                                        nnfolder-directory)
1044                                    t
1045                                    (concat
1046                                     (regexp-quote nnfolder-nov-file-suffix)
1047                                     "$")))
1048       (when (not (message-mail-file-mbox-p file))
1049         (ignore-errors
1050           (delete-file file)))))
1051     (dolist (file (directory-files nnfolder-directory))
1052       (when (and (not (backup-file-name-p file))
1053                  (message-mail-file-mbox-p
1054                   (nnheader-concat nnfolder-directory file)))
1055         (let ((oldgroup (assoc file nnfolder-group-alist)))
1056           (if oldgroup
1057               (nnheader-message 5 "Refreshing group %s..." file)
1058             (nnheader-message 5 "Adding group %s..." file))
1059           (if oldgroup
1060               (setq nnfolder-group-alist
1061                     (delq oldgroup (copy-sequence nnfolder-group-alist))))
1062           (push (list file (cons 1 0)) nnfolder-group-alist)
1063           (nnfolder-possibly-change-folder file)
1064           (nnfolder-possibly-change-group file)
1065           (nnfolder-close-group file))))
1066     (nnheader-message 5 ""))
1067
1068 (defun nnfolder-group-pathname (group)
1069   "Make file name for GROUP."
1070   (setq group
1071         (mm-encode-coding-string group nnmail-pathname-coding-system))
1072   (let ((dir (file-name-as-directory (expand-file-name nnfolder-directory))))
1073     ;; If this file exists, we use it directly.
1074     (if (or nnmail-use-long-file-names
1075             (file-exists-p (concat dir group)))
1076         (concat dir group)
1077       ;; If not, we translate dots into slashes.
1078       (concat dir (nnheader-replace-chars-in-string group ?. ?/)))))
1079
1080 (defun nnfolder-group-nov-pathname (group)
1081   "Make pathname for GROUP NOV."
1082   (let ((nnfolder-directory
1083          (or nnfolder-nov-directory nnfolder-directory)))
1084     (concat (nnfolder-group-pathname group) nnfolder-nov-file-suffix)))
1085
1086 (defun nnfolder-save-buffer ()
1087   "Save the buffer."
1088   (when (buffer-modified-p)
1089     (run-hooks 'nnfolder-save-buffer-hook)
1090     (gnus-make-directory (file-name-directory (buffer-file-name)))
1091     (let ((coding-system-for-write
1092            (or nnfolder-file-coding-system-for-write
1093                nnfolder-file-coding-system)))
1094       (set (make-local-variable 'copyright-update) nil)
1095       (save-buffer)))
1096   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1097     (nnfolder-save-nov)))
1098
1099 (defun nnfolder-save-active (group-alist active-file)
1100   (let ((nnmail-active-file-coding-system
1101          (or nnfolder-active-file-coding-system-for-write
1102              nnfolder-active-file-coding-system)))
1103     (nnmail-save-active group-alist active-file)))
1104
1105 (defun nnfolder-open-nov (group)
1106   (or (cdr (assoc group nnfolder-nov-buffer-alist))
1107       (let ((buffer (get-buffer-create (format " *nnfolder overview %s*" group))))
1108         (with-current-buffer buffer
1109           (set (make-local-variable 'nnfolder-nov-buffer-file-name)
1110                (nnfolder-group-nov-pathname group))
1111           (erase-buffer)
1112           (when (file-exists-p nnfolder-nov-buffer-file-name)
1113             (nnheader-insert-file-contents nnfolder-nov-buffer-file-name)))
1114         (push (cons group buffer) nnfolder-nov-buffer-alist)
1115         buffer)))
1116
1117 (defun nnfolder-save-nov ()
1118   (save-excursion
1119     (while nnfolder-nov-buffer-alist
1120       (when (buffer-name (cdar nnfolder-nov-buffer-alist))
1121         (set-buffer (cdar nnfolder-nov-buffer-alist))
1122         (when (buffer-modified-p)
1123           (gnus-make-directory (file-name-directory
1124                                 nnfolder-nov-buffer-file-name))
1125           (nnmail-write-region 1 (point-max) nnfolder-nov-buffer-file-name
1126                                nil 'nomesg))
1127         (set-buffer-modified-p nil)
1128         (kill-buffer (current-buffer)))
1129       (setq nnfolder-nov-buffer-alist (cdr nnfolder-nov-buffer-alist)))))
1130
1131 (defun nnfolder-nov-delete-article (group article)
1132   (with-current-buffer (nnfolder-open-nov group)
1133     (when (nnheader-find-nov-line article)
1134       (delete-region (point) (progn (forward-line 1) (point))))
1135     t))
1136
1137 (defun nnfolder-retrieve-headers-with-nov (articles &optional fetch-old)
1138   (if (or gnus-nov-is-evil nnfolder-nov-is-evil)
1139       nil
1140     (let ((nov (nnfolder-group-nov-pathname nnfolder-current-group)))
1141       (when (file-exists-p nov)
1142         (with-current-buffer nntp-server-buffer
1143           (erase-buffer)
1144           (nnheader-insert-file-contents nov)
1145           (if (and fetch-old
1146                    (not (numberp fetch-old)))
1147               t                         ; Don't remove anything.
1148             (nnheader-nov-delete-outside-range
1149              (if fetch-old (max 1 (- (car articles) fetch-old))
1150                (car articles))
1151              (car (last articles)))
1152             t))))))
1153
1154 (defun nnfolder-parse-head (&optional number b e)
1155   "Parse the head of the current buffer."
1156   (let ((buf (current-buffer))
1157         chars)
1158     (save-excursion
1159       (unless b
1160         (setq b (if (nnmail-search-unix-mail-delim-backward)
1161                     (point) (point-min)))
1162         (forward-line 1)
1163         (setq e (if (nnmail-search-unix-mail-delim)
1164                     (point) (point-max))))
1165       (setq chars (- e b))
1166       (unless (zerop chars)
1167         (goto-char b)
1168         (if (search-forward "\n\n" e t) (setq e (1- (point)))))
1169       (with-temp-buffer
1170         (insert-buffer-substring buf b e)
1171         (let ((headers (nnheader-parse-naked-head)))
1172           (mail-header-set-chars headers chars)
1173           (mail-header-set-number headers number)
1174           headers)))))
1175
1176 (defun nnfolder-add-nov (group article headers)
1177   "Add a nov line for the GROUP base."
1178   (with-current-buffer (nnfolder-open-nov group)
1179     (goto-char (point-max))
1180     (mail-header-set-number headers article)
1181     (nnheader-insert-nov headers)))
1182
1183 (deffoo nnfolder-request-set-mark (group actions &optional server)
1184   (when (and server
1185              (not (nnfolder-server-opened server)))
1186     (nnfolder-open-server server))
1187   (unless nnfolder-marks-is-evil
1188     (nnfolder-open-marks group server)
1189     (setq nnfolder-marks (nnheader-update-marks-actions nnfolder-marks actions))
1190     (nnfolder-save-marks group server))
1191   nil)
1192
1193 (deffoo nnfolder-request-marks (group info &optional server)
1194   ;; Change servers.
1195   (when (and server
1196              (not (nnfolder-server-opened server)))
1197     (nnfolder-open-server server))
1198   (when (and (not nnfolder-marks-is-evil) (nnfolder-marks-changed-p group))
1199     (nnheader-message 8 "Updating marks for %s..." group)
1200     (nnfolder-open-marks group server)
1201     ;; Update info using `nnfolder-marks'.
1202     (mapc (lambda (pred)
1203             (unless (memq (cdr pred) gnus-article-unpropagated-mark-lists)
1204               (gnus-info-set-marks
1205                info
1206                (gnus-update-alist-soft
1207                 (cdr pred)
1208                 (cdr (assq (cdr pred) nnfolder-marks))
1209                 (gnus-info-marks info))
1210                t)))
1211           gnus-article-mark-lists)
1212     (let ((seen (cdr (assq 'read nnfolder-marks))))
1213       (gnus-info-set-read info
1214                           (if (and (integerp (car seen))
1215                                    (null (cdr seen)))
1216                               (list (cons (car seen) (car seen)))
1217                             seen)))
1218     (nnheader-message 8 "Updating marks for %s...done" group))
1219   info)
1220
1221 (defun nnfolder-group-marks-pathname (group)
1222   "Make pathname for GROUP NOV."
1223   (let ((nnfolder-directory (or nnfolder-marks-directory nnfolder-directory)))
1224     (concat (nnfolder-group-pathname group) nnfolder-marks-file-suffix)))
1225
1226 (defun nnfolder-marks-changed-p (group)
1227   (let ((file (nnfolder-group-marks-pathname group)))
1228     (if (null (gnus-gethash file nnfolder-marks-modtime))
1229         t ;; never looked at marks file, assume it has changed
1230       (not (equal (gnus-gethash file nnfolder-marks-modtime)
1231                   (nth 5 (file-attributes file)))))))
1232
1233 (defun nnfolder-save-marks (group server)
1234   (let ((file-name-coding-system nnmail-pathname-coding-system)
1235         (file (nnfolder-group-marks-pathname group)))
1236     (condition-case err
1237         (progn
1238           (with-temp-file file
1239             (erase-buffer)
1240             (gnus-prin1 nnfolder-marks)
1241             (insert "\n"))
1242           (gnus-sethash file
1243                         (nth 5 (file-attributes file))
1244                         nnfolder-marks-modtime))
1245       (error (or (gnus-yes-or-no-p
1246                   (format "Could not write to %s (%s).  Continue? " file err))
1247                  (error "Cannot write to %s (%s)" file err))))))
1248
1249 (defun nnfolder-open-marks (group server)
1250   (let ((file (nnfolder-group-marks-pathname group)))
1251     (if (file-exists-p file)
1252         (condition-case err
1253             (with-temp-buffer
1254               (gnus-sethash file (nth 5 (file-attributes file))
1255                             nnfolder-marks-modtime)
1256               (nnheader-insert-file-contents file)
1257               (setq nnfolder-marks (read (current-buffer)))
1258               (dolist (el gnus-article-unpropagated-mark-lists)
1259                 (setq nnfolder-marks (gnus-remassoc el nnfolder-marks))))
1260           (error (or (gnus-yes-or-no-p
1261                       (format "Error reading nnfolder marks file %s (%s).  Continuing will use marks from .newsrc.eld.  Continue? " file err))
1262                      (error "Cannot read nnfolder marks file %s (%s)" file err))))
1263       ;; User didn't have a .marks file.  Probably first time
1264       ;; user of the .marks stuff.  Bootstrap it from .newsrc.eld.
1265       (let ((info (gnus-get-info
1266                    (gnus-group-prefixed-name
1267                     group
1268                     (gnus-server-to-method (format "nnfolder:%s" server))))))
1269         (nnheader-message 7 "Bootstrapping marks for %s..." group)
1270         (setq nnfolder-marks (gnus-info-marks info))
1271         (push (cons 'read (gnus-info-read info)) nnfolder-marks)
1272         (dolist (el gnus-article-unpropagated-mark-lists)
1273           (setq nnfolder-marks (gnus-remassoc el nnfolder-marks)))
1274         (nnfolder-save-marks group server)
1275         (nnheader-message 7 "Bootstrapping marks for %s...done" group)))))
1276
1277 (provide 'nnfolder)
1278
1279 ;;; nnfolder.el ends here