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41487370 LMI |
1 | ;;; nnfolder.el --- mail folder access for Gnus |
2 | ;; Copyright (C) 1995 Free Software Foundation, Inc. | |
3 | ||
4 | ;; Author: Scott Byer <byer@mv.us.adobe.com> | |
5 | ;; Lars Magne Ingebrigtsen <larsi@ifi.uio.no> | |
6 | ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet> | |
7 | ;; Keywords: news, mail | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;; any later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
23 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
27 | ;; For an overview of what the interface functions do, please see the | |
28 | ;; Gnus sources. | |
29 | ||
30 | ;; Various enhancements by byer@mv.us.adobe.com (Scott Byer). | |
31 | ||
32 | ;;; Code: | |
33 | ||
34 | (require 'nnheader) | |
35 | (require 'rmail) | |
36 | (require 'nnmail) | |
37 | ||
38 | (defvar nnfolder-directory (expand-file-name "~/Mail/") | |
39 | "The name of the mail box file in the users home directory.") | |
40 | ||
41 | (defvar nnfolder-active-file | |
42 | (concat (file-name-as-directory nnfolder-directory) "active") | |
43 | "The name of the active file.") | |
44 | ||
45 | ;; I renamed this variable to somehting more in keeping with the general GNU | |
46 | ;; style. -SLB | |
47 | ||
48 | (defvar nnfolder-ignore-active-file nil | |
49 | "If non-nil, causes nnfolder to do some extra work in order to determine the true active ranges of an mbox file. | |
50 | Note that the active file is still saved, but it's values are not | |
51 | used. This costs some extra time when scanning an mbox when opening | |
52 | it.") | |
53 | ||
54 | ;; Note that this variable may not be completely implemented yet. -SLB | |
55 | ||
56 | (defvar nnfolder-always-close nil | |
57 | "If non-nil, nnfolder attempts to only ever have one mbox open at a time. | |
58 | This is a straight space/performance trade off, as the mboxes will have to | |
59 | be scanned every time they are read in. If nil (default), nnfolder will | |
60 | attempt to keep the buffers around (saving the nnfolder's buffer upon group | |
61 | close, but not killing it), speeding some things up tremendously, especially | |
62 | such things as moving mail. All buffers always get killed upon server close.") | |
63 | ||
64 | (defvar nnfolder-newsgroups-file | |
65 | (concat (file-name-as-directory nnfolder-directory) "newsgroups") | |
66 | "Mail newsgroups description file.") | |
67 | ||
68 | (defvar nnfolder-get-new-mail t | |
69 | "If non-nil, nnfolder will check the incoming mail file and split the mail.") | |
70 | ||
71 | (defvar nnfolder-prepare-save-mail-hook nil | |
72 | "Hook run narrowed to an article before saving.") | |
73 | ||
74 | \f | |
75 | ||
76 | (defconst nnfolder-version "nnfolder 1.0" | |
77 | "nnfolder version.") | |
78 | ||
79 | (defconst nnfolder-article-marker "X-Gnus-Article-Number: " | |
80 | "String used to demarcate what the article number for a message is.") | |
81 | ||
82 | (defvar nnfolder-current-group nil) | |
83 | (defvar nnfolder-current-buffer nil) | |
84 | (defvar nnfolder-status-string "") | |
85 | (defvar nnfolder-group-alist nil) | |
86 | (defvar nnfolder-buffer-alist nil) | |
87 | (defvar nnfolder-active-timestamp nil) | |
88 | ||
89 | (defmacro nnfolder-article-string (article) | |
90 | (` (concat "\n" nnfolder-article-marker (int-to-string (, article)) " "))) | |
91 | ||
92 | \f | |
93 | ||
94 | (defvar nnfolder-current-server nil) | |
95 | (defvar nnfolder-server-alist nil) | |
96 | (defvar nnfolder-server-variables | |
97 | (list | |
98 | (list 'nnfolder-directory nnfolder-directory) | |
99 | (list 'nnfolder-active-file nnfolder-active-file) | |
100 | (list 'nnfolder-newsgroups-file nnfolder-newsgroups-file) | |
101 | (list 'nnfolder-get-new-mail nnfolder-get-new-mail) | |
102 | '(nnfolder-current-group nil) | |
103 | '(nnfolder-current-buffer nil) | |
104 | '(nnfolder-status-string "") | |
105 | '(nnfolder-group-alist nil) | |
106 | '(nnfolder-buffer-alist nil) | |
107 | '(nnfolder-active-timestamp nil))) | |
108 | ||
109 | \f | |
110 | ||
111 | ;;; Interface functions | |
112 | ||
113 | (defun nnfolder-retrieve-headers (sequence &optional newsgroup server) | |
114 | (save-excursion | |
115 | (set-buffer nntp-server-buffer) | |
116 | (erase-buffer) | |
117 | (let ((delim-string (concat "^" rmail-unix-mail-delimiter)) | |
118 | article art-string start stop) | |
119 | (nnfolder-possibly-change-group newsgroup) | |
120 | (set-buffer nnfolder-current-buffer) | |
121 | (goto-char (point-min)) | |
122 | (if (stringp (car sequence)) | |
123 | 'headers | |
124 | (while sequence | |
125 | (setq article (car sequence)) | |
126 | (setq art-string (nnfolder-article-string article)) | |
127 | (set-buffer nnfolder-current-buffer) | |
128 | (if (or (search-forward art-string nil t) | |
129 | ;; Don't search the whole file twice! Also, articles | |
130 | ;; probably have some locality by number, so searching | |
131 | ;; backwards will be faster. Especially if we're at the | |
132 | ;; beginning of the buffer :-). -SLB | |
133 | (search-backward art-string nil t)) | |
134 | (progn | |
135 | (setq start (or (re-search-backward delim-string nil t) | |
136 | (point))) | |
137 | (search-forward "\n\n" nil t) | |
138 | (setq stop (1- (point))) | |
139 | (set-buffer nntp-server-buffer) | |
140 | (insert (format "221 %d Article retrieved.\n" article)) | |
141 | (insert-buffer-substring nnfolder-current-buffer start stop) | |
142 | (goto-char (point-max)) | |
143 | (insert ".\n"))) | |
144 | (setq sequence (cdr sequence))) | |
145 | ||
146 | ;; Fold continuation lines. | |
147 | (set-buffer nntp-server-buffer) | |
148 | (goto-char (point-min)) | |
149 | (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t) | |
150 | (replace-match " " t t)) | |
151 | 'headers)))) | |
152 | ||
153 | (defun nnfolder-open-server (server &optional defs) | |
154 | (nnheader-init-server-buffer) | |
155 | (if (equal server nnfolder-current-server) | |
156 | t | |
157 | (if nnfolder-current-server | |
158 | (setq nnfolder-server-alist | |
159 | (cons (list nnfolder-current-server | |
160 | (nnheader-save-variables nnfolder-server-variables)) | |
161 | nnfolder-server-alist))) | |
162 | (let ((state (assoc server nnfolder-server-alist))) | |
163 | (if state | |
164 | (progn | |
165 | (nnheader-restore-variables (nth 1 state)) | |
166 | (setq nnfolder-server-alist (delq state nnfolder-server-alist))) | |
167 | (nnheader-set-init-variables nnfolder-server-variables defs))) | |
168 | (setq nnfolder-current-server server))) | |
169 | ||
170 | (defun nnfolder-close-server (&optional server) | |
171 | t) | |
172 | ||
173 | (defun nnfolder-server-opened (&optional server) | |
174 | (and (equal server nnfolder-current-server) | |
175 | nntp-server-buffer | |
176 | (buffer-name nntp-server-buffer))) | |
177 | ||
178 | (defun nnfolder-request-close () | |
179 | (let ((alist nnfolder-buffer-alist)) | |
180 | (while alist | |
181 | (nnfolder-close-group (car (car alist)) nil t) | |
182 | (setq alist (cdr alist)))) | |
183 | (setq nnfolder-buffer-alist nil | |
184 | nnfolder-group-alist nil)) | |
185 | ||
186 | (defun nnfolder-status-message (&optional server) | |
187 | nnfolder-status-string) | |
188 | ||
189 | (defun nnfolder-request-article (article &optional newsgroup server buffer) | |
190 | (nnfolder-possibly-change-group newsgroup) | |
191 | (if (stringp article) | |
192 | nil | |
193 | (save-excursion | |
194 | (set-buffer nnfolder-current-buffer) | |
195 | (goto-char (point-min)) | |
196 | (if (search-forward (nnfolder-article-string article) nil t) | |
197 | (let (start stop) | |
198 | (re-search-backward (concat "^" rmail-unix-mail-delimiter) nil t) | |
199 | (setq start (point)) | |
200 | (forward-line 1) | |
201 | (or (and (re-search-forward | |
202 | (concat "^" rmail-unix-mail-delimiter) nil t) | |
203 | (forward-line -1)) | |
204 | (goto-char (point-max))) | |
205 | (setq stop (point)) | |
206 | (let ((nntp-server-buffer (or buffer nntp-server-buffer))) | |
207 | (set-buffer nntp-server-buffer) | |
208 | (erase-buffer) | |
209 | (insert-buffer-substring nnfolder-current-buffer start stop) | |
210 | (goto-char (point-min)) | |
211 | (while (looking-at "From ") | |
212 | (delete-char 5) | |
213 | (insert "X-From-Line: ") | |
214 | (forward-line 1)) | |
215 | t)))))) | |
216 | ||
217 | (defun nnfolder-request-group (group &optional server dont-check) | |
218 | (save-excursion | |
219 | (nnmail-activate 'nnfolder) | |
220 | (nnfolder-possibly-change-group group) | |
221 | (and (assoc group nnfolder-group-alist) | |
222 | (progn | |
223 | (if dont-check | |
224 | t | |
225 | (nnfolder-get-new-mail group) | |
226 | (let* ((active (assoc group nnfolder-group-alist)) | |
227 | (group (car active)) | |
228 | (range (car (cdr active))) | |
229 | (minactive (car range)) | |
230 | (maxactive (cdr range))) | |
231 | ;; I've been getting stray 211 lines in my nnfolder active | |
232 | ;; file. So, let's make sure that doesn't happen. -SLB | |
233 | (set-buffer nntp-server-buffer) | |
234 | (erase-buffer) | |
235 | (if (not active) | |
236 | () | |
237 | (insert (format "211 %d %d %d %s\n" | |
238 | (1+ (- maxactive minactive)) | |
239 | minactive maxactive group)) | |
240 | t))))))) | |
241 | ||
242 | ;; Don't close the buffer if we're not shutting down the server. This way, | |
243 | ;; we can keep the buffer in the group buffer cache, and not have to grovel | |
244 | ;; over the buffer again unless we add new mail to it or modify it in some | |
245 | ;; way. | |
246 | ||
247 | (defun nnfolder-close-group (group &optional server force) | |
248 | ;; Make sure we _had_ the group open. | |
249 | (if (or (assoc group nnfolder-buffer-alist) | |
250 | (equal group nnfolder-current-group)) | |
251 | (progn | |
252 | (nnfolder-possibly-change-group group) | |
253 | (save-excursion | |
254 | (set-buffer nnfolder-current-buffer) | |
255 | ;; If the buffer was modified, write the file out now. | |
256 | (and (buffer-modified-p) (save-buffer)) | |
257 | (if (or force | |
258 | nnfolder-always-close) | |
259 | ;; If we're shutting the server down, we need to kill the | |
260 | ;; buffer and remove it from the open buffer list. Or, of | |
261 | ;; course, if we're trying to minimize our space impact. | |
262 | (progn | |
263 | (kill-buffer (current-buffer)) | |
264 | (setq nnfolder-buffer-alist (delq (assoc group | |
265 | nnfolder-buffer-alist) | |
266 | nnfolder-buffer-alist))))))) | |
267 | (setq nnfolder-current-group nil | |
268 | nnfolder-current-buffer nil) | |
269 | t) | |
270 | ||
271 | (defun nnfolder-request-create-group (group &optional server) | |
272 | (nnmail-activate 'nnfolder) | |
273 | (or (assoc group nnfolder-group-alist) | |
274 | (let (active) | |
275 | (setq nnfolder-group-alist | |
276 | (cons (list group (setq active (cons 1 0))) | |
277 | nnfolder-group-alist)) | |
278 | (nnmail-save-active nnfolder-group-alist nnfolder-active-file))) | |
279 | t) | |
280 | ||
281 | (defun nnfolder-request-list (&optional server) | |
282 | (if server (nnfolder-get-new-mail)) | |
283 | (save-excursion | |
284 | (nnmail-find-file nnfolder-active-file) | |
285 | (setq nnfolder-group-alist (nnmail-get-active)))) | |
286 | ||
287 | (defun nnfolder-request-newgroups (date &optional server) | |
288 | (nnfolder-request-list server)) | |
289 | ||
290 | (defun nnfolder-request-list-newsgroups (&optional server) | |
291 | (save-excursion | |
292 | (nnmail-find-file nnfolder-newsgroups-file))) | |
293 | ||
294 | (defun nnfolder-request-post (&optional server) | |
295 | (mail-send-and-exit nil)) | |
296 | ||
297 | (defalias 'nnfolder-request-post-buffer 'nnmail-request-post-buffer) | |
298 | ||
299 | (defun nnfolder-request-expire-articles | |
300 | (articles newsgroup &optional server force) | |
301 | (nnfolder-possibly-change-group newsgroup) | |
302 | (let* ((days (or (and nnmail-expiry-wait-function | |
303 | (funcall nnmail-expiry-wait-function newsgroup)) | |
304 | nnmail-expiry-wait)) | |
305 | (is-old t) | |
306 | rest) | |
307 | (nnmail-activate 'nnfolder) | |
308 | ||
309 | (save-excursion | |
310 | (set-buffer nnfolder-current-buffer) | |
311 | (while (and articles is-old) | |
312 | (goto-char (point-min)) | |
313 | (if (search-forward (nnfolder-article-string (car articles)) nil t) | |
314 | (if (or force | |
315 | (setq is-old | |
316 | (> (nnmail-days-between | |
317 | (current-time-string) | |
318 | (buffer-substring | |
319 | (point) (progn (end-of-line) (point)))) | |
320 | days))) | |
321 | (progn | |
322 | (and gnus-verbose-backends | |
323 | (message "Deleting article %s..." (car articles))) | |
324 | (nnfolder-delete-mail)) | |
325 | (setq rest (cons (car articles) rest)))) | |
326 | (setq articles (cdr articles))) | |
327 | (and (buffer-modified-p) (save-buffer)) | |
328 | ;; Find the lowest active article in this group. | |
329 | (let* ((active (car (cdr (assoc newsgroup nnfolder-group-alist)))) | |
330 | (marker (concat "\n" nnfolder-article-marker)) | |
331 | (number "[0-9]+") | |
332 | (activemin (cdr active))) | |
333 | (goto-char (point-min)) | |
334 | (while (and (search-forward marker nil t) | |
335 | (re-search-forward number nil t)) | |
336 | (setq activemin (min activemin | |
337 | (string-to-number (buffer-substring | |
338 | (match-beginning 0) | |
339 | (match-end 0)))))) | |
340 | (setcar active activemin)) | |
341 | (nnmail-save-active nnfolder-group-alist nnfolder-active-file) | |
342 | (nconc rest articles)))) | |
343 | ||
344 | (defun nnfolder-request-move-article | |
345 | (article group server accept-form &optional last) | |
346 | (nnfolder-possibly-change-group group) | |
347 | (let ((buf (get-buffer-create " *nnfolder move*")) | |
348 | result) | |
349 | (and | |
350 | (nnfolder-request-article article group server) | |
351 | (save-excursion | |
352 | (set-buffer buf) | |
353 | (buffer-disable-undo (current-buffer)) | |
354 | (erase-buffer) | |
355 | (insert-buffer-substring nntp-server-buffer) | |
356 | (goto-char (point-min)) | |
357 | (while (re-search-forward | |
358 | (concat "^" nnfolder-article-marker) | |
359 | (save-excursion (search-forward "\n\n" nil t) (point)) t) | |
360 | (delete-region (progn (beginning-of-line) (point)) | |
361 | (progn (forward-line 1) (point)))) | |
362 | (setq result (eval accept-form)) | |
363 | (kill-buffer buf) | |
364 | result) | |
365 | (save-excursion | |
366 | (nnfolder-possibly-change-group group) | |
367 | (set-buffer nnfolder-current-buffer) | |
368 | (goto-char (point-min)) | |
369 | (if (search-forward (nnfolder-article-string article) nil t) | |
370 | (nnfolder-delete-mail)) | |
371 | (and last | |
372 | (buffer-modified-p) | |
373 | (save-buffer)))) | |
374 | result)) | |
375 | ||
376 | (defun nnfolder-request-accept-article (group &optional last) | |
377 | (and (stringp group) (nnfolder-possibly-change-group group)) | |
378 | (let ((buf (current-buffer)) | |
379 | result) | |
380 | (goto-char (point-min)) | |
381 | (cond ((looking-at "X-From-Line: ") | |
382 | (replace-match "From ")) | |
383 | ((not (looking-at "From ")) | |
384 | (insert "From nobody " (current-time-string) "\n"))) | |
385 | (and | |
386 | (nnfolder-request-list) | |
387 | (save-excursion | |
388 | (set-buffer buf) | |
389 | (goto-char (point-min)) | |
390 | (search-forward "\n\n" nil t) | |
391 | (forward-line -1) | |
392 | (while (re-search-backward (concat "^" nnfolder-article-marker) nil t) | |
393 | (delete-region (point) (progn (forward-line 1) (point)))) | |
394 | (setq result (car (nnfolder-save-mail (and (stringp group) group))))) | |
395 | (save-excursion | |
396 | (set-buffer nnfolder-current-buffer) | |
397 | (and last (buffer-modified-p) (save-buffer)))) | |
398 | (nnmail-save-active nnfolder-group-alist nnfolder-active-file) | |
399 | result)) | |
400 | ||
401 | (defun nnfolder-request-replace-article (article group buffer) | |
402 | (nnfolder-possibly-change-group group) | |
403 | (save-excursion | |
404 | (set-buffer nnfolder-current-buffer) | |
405 | (goto-char (point-min)) | |
406 | (if (not (search-forward (nnfolder-article-string article) nil t)) | |
407 | nil | |
408 | (nnfolder-delete-mail t t) | |
409 | (insert-buffer-substring buffer) | |
410 | (and (buffer-modified-p) (save-buffer)) | |
411 | t))) | |
412 | ||
413 | \f | |
414 | ;;; Internal functions. | |
415 | ||
416 | (defun nnfolder-delete-mail (&optional force leave-delim) | |
417 | ;; Beginning of the article. | |
418 | (save-excursion | |
419 | (save-restriction | |
420 | (narrow-to-region | |
421 | (save-excursion | |
422 | (re-search-backward (concat "^" rmail-unix-mail-delimiter) nil t) | |
423 | (if leave-delim (progn (forward-line 1) (point)) | |
424 | (match-beginning 0))) | |
425 | (progn | |
426 | (forward-line 1) | |
427 | (or (and (re-search-forward (concat "^" rmail-unix-mail-delimiter) | |
428 | nil t) | |
429 | (if (and (not (bobp)) leave-delim) | |
430 | (progn (forward-line -2) (point)) | |
431 | (match-beginning 0))) | |
432 | (point-max)))) | |
433 | (delete-region (point-min) (point-max))))) | |
434 | ||
435 | (defun nnfolder-possibly-change-group (group) | |
436 | (or (file-exists-p nnfolder-directory) | |
437 | (make-directory (directory-file-name nnfolder-directory))) | |
438 | (nnfolder-possibly-activate-groups nil) | |
439 | (or (assoc group nnfolder-group-alist) | |
440 | (not (file-exists-p (concat (file-name-as-directory nnfolder-directory) | |
441 | group))) | |
442 | (progn | |
443 | (setq nnfolder-group-alist | |
444 | (cons (list group (cons 1 0)) nnfolder-group-alist)) | |
445 | (nnmail-save-active nnfolder-group-alist nnfolder-active-file))) | |
446 | (let (inf file) | |
447 | (if (and (equal group nnfolder-current-group) | |
448 | nnfolder-current-buffer | |
449 | (buffer-name nnfolder-current-buffer)) | |
450 | () | |
451 | (setq nnfolder-current-group group) | |
452 | ||
453 | ;; If we have to change groups, see if we don't already have the mbox | |
454 | ;; in memory. If we do, verify the modtime and destroy the mbox if | |
455 | ;; needed so we can rescan it. | |
456 | (if (setq inf (assoc group nnfolder-buffer-alist)) | |
457 | (setq nnfolder-current-buffer (nth 1 inf))) | |
458 | ||
459 | ;; If the buffer is not live, make sure it isn't in the alist. If it | |
460 | ;; is live, verify that nobody else has touched the file since last | |
461 | ;; time. | |
462 | (if (or (not (and nnfolder-current-buffer | |
463 | (buffer-name nnfolder-current-buffer))) | |
464 | (not (and (bufferp nnfolder-current-buffer) | |
465 | (verify-visited-file-modtime | |
466 | nnfolder-current-buffer)))) | |
467 | (progn | |
468 | (if (and nnfolder-current-buffer | |
469 | (buffer-name nnfolder-current-buffer) | |
470 | (bufferp nnfolder-current-buffer)) | |
471 | (kill-buffer nnfolder-current-buffer)) | |
472 | (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)) | |
473 | (setq inf nil))) | |
474 | ||
475 | (if inf | |
476 | () | |
477 | (save-excursion | |
478 | (setq file (concat (file-name-as-directory nnfolder-directory) | |
479 | group)) | |
480 | (if (file-directory-p (file-truename file)) | |
481 | () | |
482 | (if (not (file-exists-p file)) | |
483 | (write-region 1 1 file t 'nomesg)) | |
484 | (setq nnfolder-current-buffer | |
485 | (set-buffer (nnfolder-read-folder file))) | |
486 | (setq nnfolder-buffer-alist (cons (list group (current-buffer)) | |
487 | nnfolder-buffer-alist))))))) | |
488 | (setq nnfolder-current-group group)) | |
489 | ||
490 | (defun nnfolder-save-mail (&optional group) | |
491 | "Called narrowed to an article." | |
492 | (let* ((nnmail-split-methods | |
493 | (if group (list (list group "")) nnmail-split-methods)) | |
494 | (group-art-list | |
495 | (nreverse (nnmail-article-group 'nnfolder-active-number))) | |
496 | save-list group-art) | |
497 | (setq save-list group-art-list) | |
498 | (nnmail-insert-lines) | |
499 | (nnmail-insert-xref group-art-list) | |
500 | (run-hooks 'nnfolder-prepare-save-mail-hook) | |
501 | ||
502 | ;; Insert the mail into each of the destination groups. | |
503 | (while group-art-list | |
504 | (setq group-art (car group-art-list) | |
505 | group-art-list (cdr group-art-list)) | |
506 | ||
507 | ;; Kill the previous newsgroup markers. | |
508 | (goto-char (point-min)) | |
509 | (search-forward "\n\n" nil t) | |
510 | (forward-line -1) | |
511 | (while (search-backward (concat "\n" nnfolder-article-marker) nil t) | |
512 | (delete-region (1+ (point)) (progn (forward-line 2) (point)))) | |
513 | ||
514 | ;; Insert the new newsgroup marker. | |
515 | (nnfolder-possibly-change-group (car group-art)) | |
516 | (nnfolder-insert-newsgroup-line group-art) | |
517 | (let ((beg (point-min)) | |
518 | (end (point-max)) | |
519 | (obuf (current-buffer))) | |
520 | (set-buffer nnfolder-current-buffer) | |
521 | (goto-char (point-max)) | |
522 | (insert-buffer-substring obuf beg end) | |
523 | (set-buffer obuf))) | |
524 | ||
525 | ;; Did we save it anywhere? | |
526 | save-list)) | |
527 | ||
528 | (defun nnfolder-insert-newsgroup-line (group-art) | |
529 | (save-excursion | |
530 | (goto-char (point-min)) | |
531 | (if (search-forward "\n\n" nil t) | |
532 | (progn | |
533 | (forward-char -1) | |
534 | (insert (format (concat nnfolder-article-marker "%d %s\n") | |
535 | (cdr group-art) (current-time-string))))))) | |
536 | ||
537 | (defun nnfolder-possibly-activate-groups (&optional group) | |
538 | (save-excursion | |
539 | ;; If we're looking for the activation of a specific group, find out | |
540 | ;; its real name and switch to it. | |
541 | (if group (nnfolder-possibly-change-group group)) | |
542 | ;; If the group alist isn't active, activate it now. | |
543 | (nnmail-activate 'nnfolder))) | |
544 | ||
545 | (defun nnfolder-active-number (group) | |
546 | (save-excursion | |
547 | ;; Find the next article number in GROUP. | |
548 | (prog1 | |
549 | (let ((active (car (cdr (assoc group nnfolder-group-alist))))) | |
550 | (if active | |
551 | (setcdr active (1+ (cdr active))) | |
552 | ;; This group is new, so we create a new entry for it. | |
553 | ;; This might be a bit naughty... creating groups on the drop of | |
554 | ;; a hat, but I don't know... | |
555 | (setq nnfolder-group-alist | |
556 | (cons (list group (setq active (cons 1 1))) | |
557 | nnfolder-group-alist))) | |
558 | (cdr active)) | |
559 | (nnmail-save-active nnfolder-group-alist nnfolder-active-file) | |
560 | (nnfolder-possibly-activate-groups group) | |
561 | ))) | |
562 | ||
563 | ||
564 | ;; This method has a problem if you've accidentally let the active list get | |
565 | ;; out of sync with the files. This could happen, say, if you've | |
566 | ;; accidentally gotten new mail with something other than Gnus (but why | |
567 | ;; would _that_ ever happen? :-). In that case, we will be in the middle of | |
568 | ;; processing the file, ready to add new X-Gnus article number markers, and | |
569 | ;; we'll run accross a message with no ID yet - the active list _may_not_ be | |
570 | ;; ready for us yet. | |
571 | ||
572 | ;; To handle this, I'm modifying this routine to maintain the maximum ID seen | |
573 | ;; so far, and when we hit a message with no ID, we will _manually_ scan the | |
574 | ;; rest of the message looking for any more, possibly higher IDs. We'll | |
575 | ;; assume the maximum that we find is the highest active. Note that this | |
576 | ;; shouldn't cost us much extra time at all, but will be a lot less | |
577 | ;; vulnerable to glitches between the mbox and the active file. | |
578 | ||
579 | (defun nnfolder-read-folder (file) | |
580 | (save-excursion | |
581 | (nnfolder-possibly-activate-groups nil) | |
582 | ;; We should be paranoid here and make sure the group is in the alist, | |
583 | ;; and add it if it isn't. | |
584 | ;;(if (not (assoc nnfoler-current-group nnfolder-group-alist) | |
585 | (set-buffer (setq nnfolder-current-buffer | |
586 | (nnheader-find-file-noselect file nil 'raw))) | |
587 | (buffer-disable-undo (current-buffer)) | |
588 | (let ((delim (concat "^" rmail-unix-mail-delimiter)) | |
589 | (marker (concat "\n" nnfolder-article-marker)) | |
590 | (number "[0-9]+") | |
591 | (active (car (cdr (assoc nnfolder-current-group | |
592 | nnfolder-group-alist)))) | |
593 | activenumber activemin start end) | |
594 | (goto-char (point-min)) | |
595 | ;; | |
596 | ;; Anytime the active number is 1 or 0, it is supect. In that case, | |
597 | ;; search the file manually to find the active number. Or, of course, | |
598 | ;; if we're being paranoid. (This would also be the place to build | |
599 | ;; other lists from the header markers, such as expunge lists, etc., if | |
600 | ;; we ever desired to abandon the active file entirely for mboxes.) | |
601 | (setq activenumber (cdr active)) | |
602 | (if (or nnfolder-ignore-active-file | |
603 | (< activenumber 2)) | |
604 | (progn | |
605 | (setq activemin (max (1- (lsh 1 23)) | |
606 | (1- (lsh 1 24)) | |
607 | (1- (lsh 1 25)))) | |
608 | (while (and (search-forward marker nil t) | |
609 | (re-search-forward number nil t)) | |
610 | (let ((newnum (string-to-number (buffer-substring | |
611 | (match-beginning 0) | |
612 | (match-end 0))))) | |
613 | (setq activenumber (max activenumber newnum)) | |
614 | (setq activemin (min activemin newnum)))) | |
615 | (setcar active (max 1 (min activemin activenumber))) | |
616 | (setcdr active (max activenumber (cdr active))) | |
617 | (goto-char (point-min)))) | |
618 | ||
619 | ;; Keep track of the active number on our own, and insert it back into | |
620 | ;; the active list when we're done. Also, prime the pump to cut down on | |
621 | ;; the number of searches we do. | |
622 | (setq end (point-marker)) | |
623 | (set-marker end (or (and (re-search-forward delim nil t) | |
624 | (match-beginning 0)) | |
625 | (point-max))) | |
626 | (while (not (= end (point-max))) | |
627 | (setq start (marker-position end)) | |
628 | (goto-char end) | |
629 | ;; There may be more than one "From " line, so we skip past | |
630 | ;; them. | |
631 | (while (looking-at delim) | |
632 | (forward-line 1)) | |
633 | (set-marker end (or (and (re-search-forward delim nil t) | |
634 | (match-beginning 0)) | |
635 | (point-max))) | |
636 | (goto-char start) | |
637 | (if (not (search-forward marker end t)) | |
638 | (progn | |
639 | (narrow-to-region start end) | |
640 | (nnmail-insert-lines) | |
641 | (nnfolder-insert-newsgroup-line | |
642 | (cons nil (nnfolder-active-number nnfolder-current-group))) | |
643 | (widen)))) | |
644 | ||
645 | ;; Make absolutely sure that the active list reflects reality! | |
646 | (nnmail-save-active nnfolder-group-alist nnfolder-active-file) | |
647 | (current-buffer)))) | |
648 | ||
649 | (defun nnfolder-get-new-mail (&optional group) | |
650 | "Read new incoming mail." | |
651 | (let* ((spools (nnmail-get-spool-files group)) | |
652 | (group-in group) | |
653 | incomings incoming) | |
654 | (if (or (not nnfolder-get-new-mail) (not nnmail-spool-file)) | |
655 | () | |
656 | ;; We first activate all the groups. | |
657 | (nnfolder-possibly-activate-groups nil) | |
658 | ;; The we go through all the existing spool files and split the | |
659 | ;; mail from each. | |
660 | (while spools | |
661 | (and | |
662 | (file-exists-p (car spools)) | |
663 | (> (nth 7 (file-attributes (car spools))) 0) | |
664 | (progn | |
665 | (and gnus-verbose-backends | |
666 | (message "nnfolder: Reading incoming mail...")) | |
667 | (if (not (setq incoming | |
668 | (nnmail-move-inbox | |
669 | (car spools) | |
670 | (concat (file-name-as-directory nnfolder-directory) | |
671 | "Incoming")))) | |
672 | () | |
673 | (setq incomings (cons incoming incomings)) | |
674 | (setq group (nnmail-get-split-group (car spools) group-in)) | |
675 | (nnmail-split-incoming incoming 'nnfolder-save-mail nil group)))) | |
676 | (setq spools (cdr spools))) | |
677 | ;; If we did indeed read any incoming spools, we save all info. | |
678 | (if incoming | |
679 | (progn | |
680 | (nnmail-save-active nnfolder-group-alist nnfolder-active-file) | |
681 | (run-hooks 'nnmail-read-incoming-hook) | |
682 | (and gnus-verbose-backends | |
683 | (message "nnfolder: Reading incoming mail...done")))) | |
684 | (let ((bufs nnfolder-buffer-alist)) | |
685 | (save-excursion | |
686 | (while bufs | |
687 | (if (not (buffer-name (nth 1 (car bufs)))) | |
688 | (setq nnfolder-buffer-alist | |
689 | (delq (car bufs) nnfolder-buffer-alist)) | |
690 | (set-buffer (nth 1 (car bufs))) | |
691 | (and (buffer-modified-p) (save-buffer))) | |
692 | (setq bufs (cdr bufs))))) | |
693 | (while incomings | |
694 | (setq incoming (car incomings)) | |
695 | (and | |
696 | nnmail-delete-incoming | |
697 | (file-writable-p incoming) | |
698 | (file-exists-p incoming) | |
699 | (delete-file incoming)) | |
700 | (setq incomings (cdr incomings)))))) | |
701 | ||
702 | (provide 'nnfolder) | |
703 | ||
704 | ;;; nnfolder.el ends here |