nndoc.el 27.4 KB
Newer Older
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1
;;; nndoc.el --- single file access for Gnus
2 3
;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
;;        Free Software Foundation, Inc.
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
4

5
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
;; 	Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
;; Keywords: news

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;;; Code:

(require 'nnheader)
(require 'message)
(require 'nnmail)
(require 'nnoo)
34
(require 'gnus-util)
35
(require 'mm-util)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
36 37 38 39 40 41 42
(eval-when-compile (require 'cl))

(nnoo-declare nndoc)

(defvoo nndoc-article-type 'guess
  "*Type of the file.
One of `mbox', `babyl', `digest', `news', `rnews', `mmdf', `forward',
43 44
`rfc934', `rfc822-forward', `mime-parts', `standard-digest',
`slack-digest', `clari-briefs', `nsmail' or `guess'.")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
45 46 47 48

(defvoo nndoc-post-type 'mail
  "*Whether the nndoc group is `mail' or `post'.")

49 50 51
(defvoo nndoc-open-document-hook 'nnheader-ms-strip-cr
  "Hook run after opening a document.
The default function removes all trailing carriage returns
52
from the document.")
53

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
54 55 56 57
(defvar nndoc-type-alist
  `((mmdf
     (article-begin .  "^\^A\^A\^A\^A\n")
     (body-end .  "^\^A\^A\^A\^A\n"))
58 59
    (nsmail
     (article-begin .  "^From - "))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
60 61 62 63 64 65 66 67 68 69 70 71 72 73
    (news
     (article-begin . "^Path:"))
    (rnews
     (article-begin . "^#! *rnews +\\([0-9]+\\) *\n")
     (body-end-function . nndoc-rnews-body-end))
    (mbox
     (article-begin-function . nndoc-mbox-article-begin)
     (body-end-function . nndoc-mbox-body-end))
    (babyl
     (article-begin . "\^_\^L *\n")
     (body-end . "\^_")
     (body-begin-function . nndoc-babyl-body-begin)
     (head-begin-function . nndoc-babyl-head-begin))
    (forward
74 75
     (article-begin . "^-+ \\(Start of \\)?forwarded message.*\n+")
     (body-end . "^-+ End \\(of \\)?forwarded message.*$")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
76 77 78 79 80 81 82 83 84 85 86 87 88 89
     (prepare-body-function . nndoc-unquote-dashes))
    (rfc934
     (article-begin . "^--.*\n+")
     (body-end . "^--.*$")
     (prepare-body-function . nndoc-unquote-dashes))
    (clari-briefs
     (article-begin . "^ \\*")
     (body-end . "^\t------*[ \t]^*\n^ \\*")
     (body-begin . "^\t")
     (head-end . "^\t")
     (generate-head-function . nndoc-generate-clari-briefs-head)
     (article-transform-function . nndoc-transform-clari-briefs))
    (mime-digest
     (article-begin . "")
90
     (head-begin . "^ ?\n")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
91 92 93 94
     (head-end . "^ ?$")
     (body-end . "")
     (file-end . "")
     (subtype digest guess))
95 96 97
    (mime-parts
     (generate-head-function . nndoc-generate-mime-parts-head)
     (article-transform-function . nndoc-transform-mime-parts))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
98
    (standard-digest
99 100
     (first-article . ,(concat "^" (make-string 70 ?-) "\n *\n+"))
     (article-begin . ,(concat "^\n" (make-string 30 ?-) "\n *\n+"))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
101 102
     (prepare-body-function . nndoc-unquote-dashes)
     (body-end-function . nndoc-digest-body-end)
103 104
     (head-end . "^ *$")
     (body-begin . "^ *\n")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
     (file-end . "^End of .*digest.*[0-9].*\n\\*\\*\\|^End of.*Digest *$")
     (subtype digest guess))
    (slack-digest
     (article-begin . "^------------------------------*[\n \t]+")
     (head-end . "^ ?$")
     (body-end-function . nndoc-digest-body-end)
     (body-begin . "^ ?$")
     (file-end . "^End of")
     (prepare-body-function . nndoc-unquote-dashes)
     (subtype digest guess))
    (lanl-gov-announce
     (article-begin . "^\\\\\\\\\n")
     (head-begin . "^Paper.*:")
     (head-end   . "\\(^\\\\\\\\.*\n\\|-----------------\\)")
     (body-begin . "")
     (body-end   . "-------------------------------------------------")
     (file-end   . "^Title: Recent Seminal")
     (generate-head-function . nndoc-generate-lanl-gov-head)
     (article-transform-function . nndoc-transform-lanl-gov-announce)
     (subtype preprints guess))
    (rfc822-forward
     (article-begin . "^\n")
     (body-end-function . nndoc-rfc822-forward-body-end-function))
128 129 130
    (outlook
     (article-begin-function . nndoc-outlook-article-begin)
     (body-end .  "\0"))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
    (guess
     (guess . t)
     (subtype nil))
    (digest
     (guess . t)
     (subtype nil))
    (preprints
     (guess . t)
     (subtype nil))))


(defvoo nndoc-file-begin nil)
(defvoo nndoc-first-article nil)
(defvoo nndoc-article-begin nil)
(defvoo nndoc-head-begin nil)
(defvoo nndoc-head-end nil)
(defvoo nndoc-file-end nil)
(defvoo nndoc-body-begin nil)
(defvoo nndoc-body-end-function nil)
(defvoo nndoc-body-begin-function nil)
(defvoo nndoc-head-begin-function nil)
(defvoo nndoc-body-end nil)
153
;; nndoc-dissection-alist is a list of sublists.  Each sublist holds the
154 155 156 157 158 159 160
;; following items.  ARTICLE acts as the association key and is an ordinal
;; starting at 1.  HEAD-BEGIN [0], HEAD-END [1], BODY-BEGIN [2] and BODY-END
;; [3] are positions in the `nndoc' buffer.  LINE-COUNT [4] is a count of
;; lines in the body.  For MIME dissections only, ARTICLE-INSERT [5] and
;; SUMMARY-INSERT [6] give headers to insert for full article or summary line
;; generation, respectively.  Other headers usually follow directly from the
;; buffer.  Value `nil' means no insert.
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198
(defvoo nndoc-dissection-alist nil)
(defvoo nndoc-prepare-body-function nil)
(defvoo nndoc-generate-head-function nil)
(defvoo nndoc-article-transform-function nil)
(defvoo nndoc-article-begin-function nil)

(defvoo nndoc-status-string "")
(defvoo nndoc-group-alist nil)
(defvoo nndoc-current-buffer nil
  "Current nndoc news buffer.")
(defvoo nndoc-address nil)

(defconst nndoc-version "nndoc 1.0"
  "nndoc version.")



;;; Interface functions

(nnoo-define-basics nndoc)

(deffoo nndoc-retrieve-headers (articles &optional newsgroup server fetch-old)
  (when (nndoc-possibly-change-buffer newsgroup server)
    (save-excursion
      (set-buffer nntp-server-buffer)
      (erase-buffer)
      (let (article entry)
	(if (stringp (car articles))
	    'headers
	  (while articles
	    (when (setq entry (cdr (assq (setq article (pop articles))
					 nndoc-dissection-alist)))
	      (insert (format "221 %d Article retrieved.\n" article))
	      (if nndoc-generate-head-function
		  (funcall nndoc-generate-head-function article)
		(insert-buffer-substring
		 nndoc-current-buffer (car entry) (nth 1 entry)))
	      (goto-char (point-max))
199
	      (unless (eq (char-after (1- (point))) ?\n)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303
		(insert "\n"))
	      (insert (format "Lines: %d\n" (nth 4 entry)))
	      (insert ".\n")))

	  (nnheader-fold-continuation-lines)
	  'headers)))))

(deffoo nndoc-request-article (article &optional newsgroup server buffer)
  (nndoc-possibly-change-buffer newsgroup server)
  (save-excursion
    (let ((buffer (or buffer nntp-server-buffer))
	  (entry (cdr (assq article nndoc-dissection-alist)))
	  beg)
      (set-buffer buffer)
      (erase-buffer)
      (when entry
	(if (stringp article)
	    nil
	  (insert-buffer-substring
	   nndoc-current-buffer (car entry) (nth 1 entry))
	  (insert "\n")
	  (setq beg (point))
	  (insert-buffer-substring
	   nndoc-current-buffer (nth 2 entry) (nth 3 entry))
	  (goto-char beg)
	  (when nndoc-prepare-body-function
	    (funcall nndoc-prepare-body-function))
	  (when nndoc-article-transform-function
	    (funcall nndoc-article-transform-function article))
	  t)))))

(deffoo nndoc-request-group (group &optional server dont-check)
  "Select news GROUP."
  (let (number)
    (cond
     ((not (nndoc-possibly-change-buffer group server))
      (nnheader-report 'nndoc "No such file or buffer: %s"
		       nndoc-address))
     (dont-check
      (nnheader-report 'nndoc "Selected group %s" group)
      t)
     ((zerop (setq number (length nndoc-dissection-alist)))
      (nndoc-close-group group)
      (nnheader-report 'nndoc "No articles in group %s" group))
     (t
      (nnheader-insert "211 %d %d %d %s\n" number 1 number group)))))

(deffoo nndoc-request-type (group &optional article)
  (cond ((not article) 'unknown)
        (nndoc-post-type nndoc-post-type)
        (t 'unknown)))

(deffoo nndoc-close-group (group &optional server)
  (nndoc-possibly-change-buffer group server)
  (and nndoc-current-buffer
       (buffer-name nndoc-current-buffer)
       (kill-buffer nndoc-current-buffer))
  (setq nndoc-group-alist (delq (assoc group nndoc-group-alist)
				nndoc-group-alist))
  (setq nndoc-current-buffer nil)
  (nnoo-close-server 'nndoc server)
  (setq nndoc-dissection-alist nil)
  t)

(deffoo nndoc-request-list (&optional server)
  nil)

(deffoo nndoc-request-newgroups (date &optional server)
  nil)

(deffoo nndoc-request-list-newsgroups (&optional server)
  nil)


;;; Internal functions.

(defun nndoc-possibly-change-buffer (group source)
  (let (buf)
    (cond
     ;; The current buffer is this group's buffer.
     ((and nndoc-current-buffer
	   (buffer-name nndoc-current-buffer)
	   (eq nndoc-current-buffer
	       (setq buf (cdr (assoc group nndoc-group-alist))))))
     ;; We change buffers by taking an old from the group alist.
     ;; `source' is either a string (a file name) or a buffer object.
     (buf
      (setq nndoc-current-buffer buf))
     ;; It's a totally new group.
     ((or (and (bufferp nndoc-address)
	       (buffer-name nndoc-address))
	  (and (stringp nndoc-address)
	       (file-exists-p nndoc-address)
	       (not (file-directory-p nndoc-address))))
      (push (cons group (setq nndoc-current-buffer
			      (get-buffer-create
			       (concat " *nndoc " group "*"))))
	    nndoc-group-alist)
      (setq nndoc-dissection-alist nil)
      (save-excursion
	(set-buffer nndoc-current-buffer)
	(erase-buffer)
	(if (stringp nndoc-address)
	    (nnheader-insert-file-contents nndoc-address)
304 305
	  (insert-buffer-substring nndoc-address))
	(run-hooks 'nndoc-open-document-hook))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
306 307 308 309 310 311
    ;; Initialize the nndoc structures according to this new document.
    (when (and nndoc-current-buffer
	       (not nndoc-dissection-alist))
      (save-excursion
	(set-buffer nndoc-current-buffer)
	(nndoc-set-delims)
312 313 314
	(if (eq nndoc-article-type 'mime-parts)
	    (nndoc-dissect-mime-parts)
	  (nndoc-dissect-buffer))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
315 316 317 318 319 320 321 322 323 324 325 326 327
    (unless nndoc-current-buffer
      (nndoc-close-server))
    ;; Return whether we managed to select a file.
    nndoc-current-buffer))

;;;
;;; Deciding what document type we have
;;;

(defun nndoc-set-delims ()
  "Set the nndoc delimiter variables according to the type of the document."
  (let ((vars '(nndoc-file-begin
		nndoc-first-article
328 329
		nndoc-article-begin-function
		nndoc-head-begin nndoc-head-end
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353
		nndoc-file-end nndoc-article-begin
		nndoc-body-begin nndoc-body-end-function nndoc-body-end
		nndoc-prepare-body-function nndoc-article-transform-function
		nndoc-generate-head-function nndoc-body-begin-function
		nndoc-head-begin-function)))
    (while vars
      (set (pop vars) nil)))
  (let (defs)
    ;; Guess away until we find the real file type.
    (while (assq 'guess (setq defs (cdr (assq nndoc-article-type
					      nndoc-type-alist))))
      (setq nndoc-article-type (nndoc-guess-type nndoc-article-type)))
    ;; Set the nndoc variables.
    (while defs
      (set (intern (format "nndoc-%s" (caar defs)))
	   (cdr (pop defs))))))

(defun nndoc-guess-type (subtype)
  (let ((alist nndoc-type-alist)
	results result entry)
    (while (and (not result)
		(setq entry (pop alist)))
      (when (memq subtype (or (cdr (assq 'subtype entry)) '(guess)))
	(goto-char (point-min))
354 355 356
	;; Remove blank lines.
	(while (eq (following-char) ?\n)
	  (delete-char 1))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
357 358 359 360 361 362 363 364 365
	(when (numberp (setq result (funcall (intern
					      (format "nndoc-%s-type-p"
						      (car entry))))))
	  (push (cons result entry) results)
	  (setq result nil))))
    (unless (or result results)
      (error "Document is not of any recognized type"))
    (if result
	(car entry)
366
      (cadar (sort results 'car-less-than-car)))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421

;;;
;;; Built-in type predicates and functions
;;;

(defun nndoc-mbox-type-p ()
  (when (looking-at message-unix-mail-delimiter)
    t))

(defun nndoc-mbox-article-begin ()
  (when (re-search-forward (concat "^" message-unix-mail-delimiter) nil t)
    (goto-char (match-beginning 0))))

(defun nndoc-mbox-body-end ()
  (let ((beg (point))
	len end)
    (when
	(save-excursion
	  (and (re-search-backward
		(concat "^" message-unix-mail-delimiter) nil t)
	       (setq end (point))
	       (search-forward "\n\n" beg t)
	       (re-search-backward
		"^Content-Length:[ \t]*\\([0-9]+\\) *$" end t)
	       (setq len (string-to-int (match-string 1)))
	       (search-forward "\n\n" beg t)
	       (unless (= (setq len (+ (point) len)) (point-max))
		 (and (< len (point-max))
		      (goto-char len)
		      (looking-at message-unix-mail-delimiter)))))
      (goto-char len))))

(defun nndoc-mmdf-type-p ()
  (when (looking-at "\^A\^A\^A\^A$")
    t))

(defun nndoc-news-type-p ()
  (when (looking-at "^Path:.*\n")
    t))

(defun nndoc-rnews-type-p ()
  (when (looking-at "#! *rnews")
    t))

(defun nndoc-rnews-body-end ()
  (and (re-search-backward nndoc-article-begin nil t)
       (forward-line 1)
       (goto-char (+ (point) (string-to-int (match-string 1))))))

(defun nndoc-babyl-type-p ()
  (when (re-search-forward "\^_\^L *\n" nil t)
    t))

(defun nndoc-babyl-body-begin ()
  (re-search-forward "^\n" nil t)
422
  (when (looking-at "\\*\\*\\* EOOH \\*\\*\\*")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
423 424 425 426 427 428 429 430 431 432 433
    (let ((next (or (save-excursion
		      (re-search-forward nndoc-article-begin nil t))
		    (point-max))))
      (unless (re-search-forward "^\n" next t)
	(goto-char next)
	(forward-line -1)
	(insert "\n")
	(forward-line -1)))))

(defun nndoc-babyl-head-begin ()
  (when (re-search-forward "^[0-9].*\n" nil t)
434
    (when (looking-at "\\*\\*\\* EOOH \\*\\*\\*")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
435 436 437 438
      (forward-line 1))
    t))

(defun nndoc-forward-type-p ()
439 440
  (when (and (re-search-forward "^-+ \\(Start of \\)?forwarded message.*\n+" 
				nil t)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461
	     (not (re-search-forward "^Subject:.*digest" nil t))
	     (not (re-search-backward "^From:" nil t 2))
	     (not (re-search-forward "^From:" nil t 2)))
    t))

(defun nndoc-rfc934-type-p ()
  (when (and (re-search-forward "^-+ Start of forwarded.*\n+" nil t)
	     (not (re-search-forward "^Subject:.*digest" nil t))
	     (not (re-search-backward "^From:" nil t 2))
	     (not (re-search-forward "^From:" nil t 2)))
    t))

(defun nndoc-rfc822-forward-type-p ()
  (save-restriction
    (message-narrow-to-head)
    (when (re-search-forward "^Content-Type: *message/rfc822" nil t)
      t)))

(defun nndoc-rfc822-forward-body-end-function ()
  (goto-char (point-max)))

462 463 464 465 466
(defun nndoc-mime-parts-type-p ()
  (let ((case-fold-search t)
	(limit (search-forward "\n\n" nil t)))
    (goto-char (point-min))
    (when (and limit
467 468 469 470 471
	       (re-search-forward
		(concat "\
^Content-Type:[ \t]*multipart/[a-z]+ *; *\\(\\(\n[ \t]\\)?.*;\\)*"
			"\\(\n[ \t]\\)?[ \t]*boundary=\"?[^\"\n]*[^\" \t\n]")
		limit t))
472 473 474
      t)))

(defun nndoc-transform-mime-parts (article)
475 476 477
  (let* ((entry (cdr (assq article nndoc-dissection-alist)))
	 (headers (nth 5 entry)))
    (when headers
478
      (goto-char (point-min))
479 480 481 482 483 484 485 486 487 488 489 490
      (insert headers))))

(defun nndoc-generate-mime-parts-head (article)
  (let* ((entry (cdr (assq article nndoc-dissection-alist)))
	 (headers (nth 6 entry)))
    (save-restriction
      (narrow-to-region (point) (point))
      (insert-buffer-substring
       nndoc-current-buffer (car entry) (nth 1 entry))
      (goto-char (point-max)))
    (when headers
      (insert headers))))
491

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522
(defun nndoc-clari-briefs-type-p ()
  (when (let ((case-fold-search nil))
	  (re-search-forward "^\t[^a-z]+ ([^a-z]+) --" nil t))
    t))

(defun nndoc-transform-clari-briefs (article)
  (goto-char (point-min))
  (when (looking-at " *\\*\\(.*\\)\n")
    (replace-match "" t t))
  (nndoc-generate-clari-briefs-head article))

(defun nndoc-generate-clari-briefs-head (article)
  (let ((entry (cdr (assq article nndoc-dissection-alist)))
	subject from)
    (save-excursion
      (set-buffer nndoc-current-buffer)
      (save-restriction
	(narrow-to-region (car entry) (nth 3 entry))
	(goto-char (point-min))
	(when (looking-at " *\\*\\(.*\\)$")
	  (setq subject (match-string 1))
	  (when (string-match "[ \t]+$" subject)
	    (setq subject (substring subject 0 (match-beginning 0)))))
	(when
	    (let ((case-fold-search nil))
	      (re-search-forward
	       "^\t\\([^a-z]+\\(,[^(]+\\)? ([^a-z]+)\\) --" nil t))
	  (setq from (match-string 1)))))
    (insert "From: " "clari@clari.net (" (or from "unknown") ")"
	    "\nSubject: " (or subject "(no subject)") "\n")))

523

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
524 525 526 527 528 529
(defun nndoc-mime-digest-type-p ()
  (let ((case-fold-search t)
	boundary-id b-delimiter entry)
    (when (and
	   (re-search-forward
	    (concat "^Content-Type: *multipart/digest;[ \t\n]*[ \t]"
530
		    "boundary=\"?\\([^\"\n]*[^\" \t\n]\\)")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
531 532 533
	    nil t)
	   (match-beginning 1))
      (setq boundary-id (match-string 1)
534
	    b-delimiter (concat "\n--" boundary-id "[ \t]*$"))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
535 536 537
      (setq entry (assq 'mime-digest nndoc-type-alist))
      (setcdr entry
	      (list
538
	       (cons 'head-begin "^ ?\n")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566
	       (cons 'head-end "^ ?$")
	       (cons 'body-begin "^ ?\n")
	       (cons 'article-begin b-delimiter)
	       (cons 'body-end-function 'nndoc-digest-body-end)
	       (cons 'file-end (concat "\n--" boundary-id "--[ \t]*$"))))
      t)))

(defun nndoc-standard-digest-type-p ()
  (when (and (re-search-forward (concat "^" (make-string 70 ?-) "\n\n") nil t)
	     (re-search-forward
	      (concat "\n\n" (make-string 30 ?-) "\n\n") nil t))
    t))

(defun nndoc-digest-body-end ()
  (and (re-search-forward nndoc-article-begin nil t)
       (goto-char (match-beginning 0))))

(defun nndoc-slack-digest-type-p ()
  0)

(defun nndoc-lanl-gov-announce-type-p ()
  (when (let ((case-fold-search nil))
	  (re-search-forward "^\\\\\\\\\nPaper: [a-z-]+/[0-9]+" nil t))
    t))

(defun nndoc-transform-lanl-gov-announce (article)
  (goto-char (point-max))
  (when (re-search-backward "^\\\\\\\\ +(\\([^ ]*\\) , *\\([^ ]*\\))" nil t)
567
    (replace-match "\n\nGet it at \\1 (\\2)" t nil)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584

(defun nndoc-generate-lanl-gov-head (article)
  (let ((entry (cdr (assq article nndoc-dissection-alist)))
 	(e-mail "no address given")
 	subject from)
    (save-excursion
      (set-buffer nndoc-current-buffer)
      (save-restriction
 	(narrow-to-region (car entry) (nth 1 entry))
 	(goto-char (point-min))
 	(when (looking-at "^Paper.*: \\([a-z-]+/[0-9]+\\)")
 	  (setq subject (concat " (" (match-string 1) ")"))
 	  (when (re-search-forward "^From: \\([^ ]+\\)" nil t)
 	    (setq e-mail (match-string 1)))
 	  (when (re-search-forward "^Title: \\([^\f]*\\)\nAuthors?: \\(.*\\)"
 				   nil t)
 	    (setq subject (concat (match-string 1) subject))
585
 	    (setq from (concat (match-string 2) " <" e-mail ">"))))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
586 587 588 589 590
    (while (and from (string-match "(\[^)\]*)" from))
      (setq from (replace-match "" t t from)))
    (insert "From: "  (or from "unknown")
 	    "\nSubject: " (or subject "(no subject)") "\n")))

591 592 593 594 595 596 597 598 599 600 601 602
(defun nndoc-nsmail-type-p ()
  (when (looking-at "From - ")
    t))

(defun nndoc-outlook-article-begin ()
  (prog1 (re-search-forward "From:\\|Received:" nil t)
    (goto-char (match-beginning 0))))

(defun nndoc-outlook-type-p ()
  ;; FIXME: Is JMF the magic of outlook mailbox? -- ShengHuo.
  (looking-at "JMF"))

603 604 605
(deffoo nndoc-request-accept-article (group &optional server last)
  nil)

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624

;;;
;;; Functions for dissecting the documents
;;;

(defun nndoc-search (regexp)
  (prog1
      (re-search-forward regexp nil t)
    (beginning-of-line)))

(defun nndoc-dissect-buffer ()
  "Go through the document and partition it into heads/bodies/articles."
  (let ((i 0)
	(first t)
	head-begin head-end body-begin body-end)
    (setq nndoc-dissection-alist nil)
    (save-excursion
      (set-buffer nndoc-current-buffer)
      (goto-char (point-min))
625 626 627
      ;; Remove blank lines.
      (while (eq (following-char) ?\n)
	(delete-char 1))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
628 629 630 631 632 633 634 635 636 637 638 639
      ;; Find the beginning of the file.
      (when nndoc-file-begin
	(nndoc-search nndoc-file-begin))
      ;; Go through the file.
      (while (if (and first nndoc-first-article)
		 (nndoc-search nndoc-first-article)
	       (nndoc-article-begin))
	(setq first nil)
	(cond (nndoc-head-begin-function
	       (funcall nndoc-head-begin-function))
	      (nndoc-head-begin
	       (nndoc-search nndoc-head-begin)))
640
 	(if (or (eobp)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676
		(and nndoc-file-end
		     (looking-at nndoc-file-end)))
	    (goto-char (point-max))
	  (setq head-begin (point))
	  (nndoc-search (or nndoc-head-end "^$"))
	  (setq head-end (point))
	  (if nndoc-body-begin-function
	      (funcall nndoc-body-begin-function)
	    (nndoc-search (or nndoc-body-begin "^\n")))
	  (setq body-begin (point))
	  (or (and nndoc-body-end-function
		   (funcall nndoc-body-end-function))
	      (and nndoc-body-end
		   (nndoc-search nndoc-body-end))
	      (nndoc-article-begin)
	      (progn
		(goto-char (point-max))
		(when nndoc-file-end
		  (and (re-search-backward nndoc-file-end nil t)
		       (beginning-of-line)))))
	  (setq body-end (point))
	  (push (list (incf i) head-begin head-end body-begin body-end
		      (count-lines body-begin body-end))
		nndoc-dissection-alist))))))

(defun nndoc-article-begin ()
  (if nndoc-article-begin-function
      (funcall nndoc-article-begin-function)
    (ignore-errors
      (nndoc-search nndoc-article-begin))))

(defun nndoc-unquote-dashes ()
  "Unquote quoted non-separators in digests."
  (while (re-search-forward "^- -"nil t)
    (replace-match "-" t t)))

677 678 679 680 681 682 683 684 685 686 687
;; Against compiler warnings.
(defvar nndoc-mime-split-ordinal)

(defun nndoc-dissect-mime-parts ()
  "Go through a MIME composite article and partition it into sub-articles.
When a MIME entity contains sub-entities, dissection produces one article for
the header of this entity, and one article per sub-entity."
  (setq nndoc-dissection-alist nil
	nndoc-mime-split-ordinal 0)
  (save-excursion
    (set-buffer nndoc-current-buffer)
688 689 690 691 692 693 694
    (nndoc-dissect-mime-parts-sub (point-min) (point-max) nil nil nil)))

(defun nndoc-dissect-mime-parts-sub (head-begin body-end article-insert
						position parent)
  "Dissect an entity, within a composite MIME message.
The complete message or MIME entity extends from HEAD-BEGIN to BODY-END.
ARTICLE-INSERT should be added at beginning for generating a full article.
695 696
The string POSITION holds a dotted decimal representation of the article
position in the hierarchical structure, it is nil for the outer entity.
697 698 699 700 701 702 703
PARENT is the message-ID of the parent summary line, or nil for none."
  (let ((case-fold-search t)
	(message-id (nnmail-message-id))
	head-end body-begin summary-insert message-rfc822 multipart-any
	subject content-type type subtype boundary-regexp)
    ;; Gracefully handle a missing body.
    (goto-char head-begin)
704 705
    (if (or (and (eq (char-after) ?\n) (or (forward-char 1) t))
	    (search-forward "\n\n" body-end t))
706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792
	(setq head-end (1- (point))
	      body-begin (point))
      (setq head-end body-end
	    body-begin body-end))
    (narrow-to-region head-begin head-end)
    ;; Save MIME attributes.
    (goto-char head-begin)
    (setq content-type (message-fetch-field "Content-Type"))
    (when content-type
      (when (string-match
	     "^ *\\([^ \t\n/;]+\\)/\\([^ \t\n/;]+\\)" content-type)
	(setq type (downcase (match-string 1 content-type))
	      subtype (downcase (match-string 2 content-type))
	      message-rfc822 (and (string= type "message")
				  (string= subtype "rfc822"))
	      multipart-any (string= type "multipart")))
      (when (string-match ";[ \t\n]*name=\\([^ \t\n;]+\\)" content-type)
	(setq subject (match-string 1 content-type)))
      (when (string-match "boundary=\"?\\([^\"\n]*[^\" \t\n]\\)" content-type)
	(setq boundary-regexp (concat "^--"
				      (regexp-quote
				       (match-string 1 content-type))
				      "\\(--\\)?[ \t]*\n"))))
    (unless subject
      (when (or multipart-any (not article-insert))
	(setq subject (message-fetch-field "Subject"))))
    (unless type
      (setq type "text"
	    subtype "plain"))
    ;; Prepare the article and summary inserts.
    (unless article-insert
      (setq article-insert (buffer-substring (point-min) (point-max))
	    head-end head-begin))
    (setq summary-insert article-insert)
    ;; - summary Subject.
    (setq summary-insert
	  (let ((line (concat "Subject: <" position
			      (and position multipart-any ".")
			      (and multipart-any "*")
			      (and (or position multipart-any) " ")
			      (cond ((string= subtype "plain") type)
				    ((string= subtype "basic") type)
				    (t subtype))
			      ">"
			      (and subject " ")
			      subject
			      "\n")))
	    (if (string-match "Subject:.*\n\\([ \t].*\n\\)*" summary-insert)
		(replace-match line t t summary-insert)
	      (concat summary-insert line))))
    ;; - summary Message-ID.
    (setq summary-insert
	  (let ((line (concat "Message-ID: " message-id "\n")))
	    (if (string-match "Message-ID:.*\n\\([ \t].*\n\\)*" summary-insert)
		(replace-match line t t summary-insert)
	      (concat summary-insert line))))
    ;; - summary References.
    (when parent
      (setq summary-insert
	    (let ((line (concat "References: " parent "\n")))
	      (if (string-match "References:.*\n\\([ \t].*\n\\)*"
				summary-insert)
		  (replace-match line t t summary-insert)
		(concat summary-insert line)))))
    ;; Generate dissection information for this entity.
    (push (list (incf nndoc-mime-split-ordinal)
		head-begin head-end body-begin body-end
		(count-lines body-begin body-end)
		article-insert summary-insert)
	  nndoc-dissection-alist)
    ;; Recurse for all sub-entities, if any.
    (widen)
    (cond
     (message-rfc822
      (save-excursion
	(nndoc-dissect-mime-parts-sub body-begin body-end nil
				      position message-id)))
     ((and multipart-any boundary-regexp)
      (let ((part-counter 0)
	    part-begin part-end eof-flag)
	(while (string-match "\
^\\(Lines\\|Content-\\(Type\\|Transfer-Encoding\\|Disposition\\)\\):.*\n\\([ \t].*\n\\)*"
			     article-insert)
	  (setq article-insert (replace-match "" t t article-insert)))
	(let ((case-fold-search nil))
	  (goto-char body-begin)
	  (setq eof-flag (not (re-search-forward boundary-regexp body-end t)))
793
	  (while (not eof-flag)
794 795
	    (setq part-begin (point))
	    (cond ((re-search-forward boundary-regexp body-end t)
796 797 798 799
		   (or (not (match-string 1))
		       (string= (match-string 1) "")
		       (setq eof-flag t))
		   (forward-line -1)
800
		   (setq part-end (point))
801
		   (forward-line 1))
802
		  (t (setq part-end body-end
803
			   eof-flag t)))
804 805 806 807 808 809 810
	    (save-excursion
	      (nndoc-dissect-mime-parts-sub
	       part-begin part-end article-insert
	       (concat position
		       (and position ".")
		       (format "%d" (incf part-counter)))
	       message-id)))))))))
811

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
812 813 814 815 816 817 818 819
;;;###autoload
(defun nndoc-add-type (definition &optional position)
  "Add document DEFINITION to the list of nndoc document definitions.
If POSITION is nil or `last', the definition will be added
as the last checked definition, if t or `first', add as the
first definition, and if any other symbol, add after that
symbol in the alist."
  ;; First remove any old instances.
820
  (gnus-pull (car definition) nndoc-type-alist)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836
  ;; Then enter the new definition in the proper place.
  (cond
   ((or (null position) (eq position 'last))
    (setq nndoc-type-alist (nconc nndoc-type-alist (list definition))))
   ((or (eq position t) (eq position 'first))
    (push definition nndoc-type-alist))
   (t
    (let ((list (memq (assq position nndoc-type-alist)
		      nndoc-type-alist)))
      (unless list
	(error "No such position: %s" position))
      (setcdr list (cons definition (cdr list)))))))

(provide 'nndoc)

;;; nndoc.el ends here