1;;; rnews.el --- USENET news reader for GNU Emacs 2 3;; Copyright (C) 1985, 1986, 1987, 2001, 2002, 2003, 2004, 4;; 2005, 2006, 2007 Free Software Foundation, Inc. 5 6;; Maintainer: FSF 7;; Keywords: news 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 the 23;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 24;; Boston, MA 02110-1301, USA. 25 26;;; Change Log: 27 28;; Created Sun Mar 10,1985 at 21:35:01 ads and sundar@hernes.ai.mit.edu 29;; Should do the point pdl stuff sometime 30;; finito except pdl.... Sat Mar 16,1985 at 06:43:44 31;; lets keep the summary stuff out until we get it working .. 32;; sundar@hermes.ai.mit.edu Wed Apr 10,1985 at 16:32:06 33;; hack slash maim. mly@gnu.org Thu 18 Apr, 1985 06:11:14 34;; modified to correct reentrance bug, to not bother with groups that 35;; received no new traffic since last read completely, to find out 36;; what traffic a group has available much more quickly when 37;; possible, to do some completing reads for group names - should 38;; be much faster... 39;; KING@KESTREL.arpa, Thu Mar 13 09:03:28 1986 40;; made news-{next,previous}-group skip groups with no new messages; and 41;; added checking for unsubscribed groups to news-add-news-group 42;; tower@gnu.org Jul 18 1986 43;; bound rmail-output to C-o; and changed header-field commands binding to 44;; agree with the new C-c C-f usage in sendmail 45;; tower@gnu.org Sep 3 1986 46;; added news-rotate-buffer-body 47;; tower@gnu.org Oct 17 1986 48;; made messages more user friendly, cleaned up news-inews 49;; move posting and mail code to new file rnewpost.el 50;; tower@gnu.org Oct 29 1986 51;; added caesar-region, rename news-caesar-buffer-body, hacked accordingly 52;; tower@gnu.org Nov 21 1986 53;; added tower@gnu.org 22 Apr 87 54 55;;; Commentary: 56 57;;; Code: 58 59(require 'mail-utils) 60(require 'sendmail) 61 62(defvar caesar-translate-table) 63(defvar minor-modes) 64(defvar news-buffer-save) 65(defvar news-group-name) 66(defvar news-minor-modes) 67 68(autoload 'rmail-output "rmailout" 69 "Append this message to Unix mail file named FILE-NAME." 70 t) 71 72(autoload 'news-reply "rnewspost" 73 "Compose and post a reply to the current article on USENET. 74While composing the reply, use \\[mail-yank-original] to yank the original 75message into it." 76 t) 77 78(autoload 'news-mail-other-window "rnewspost" 79 "Send mail in another window. 80While composing the message, use \\[mail-yank-original] to yank the 81original message into it." 82 t) 83 84(autoload 'news-post-news "rnewspost" 85 "Begin editing a new USENET news article to be posted." 86 t) 87 88(autoload 'news-mail-reply "rnewspost" 89 "Mail a reply to the author of the current article. 90While composing the reply, use \\[mail-yank-original] to yank the original 91message into it." 92 t) 93 94(defvar news-group-hook-alist nil 95 "Alist of (GROUP-REGEXP . HOOK) pairs. 96Just before displaying a message, each HOOK is called 97if its GROUP-REGEXP matches the current newsgroup name.") 98 99(defvar rmail-last-file (expand-file-name "~/mbox.news")) 100 101;Now in paths.el. 102;(defvar news-path "/usr/spool/news/" 103; "The root directory below which all news files are stored.") 104 105(defvar news-startup-file "$HOME/.newsrc" "Contains ~/.newsrc") 106(defvar news-certification-file "$HOME/.news-dates" "Contains ~/.news-dates") 107 108;; random headers that we decide to ignore. 109(defvar news-ignored-headers 110 "^Path:\\|^Posting-Version:\\|^Article-I.D.:\\|^Expires:\\|^Date-Received:\\|^References:\\|^Control:\\|^Xref:\\|^Lines:\\|^Posted:\\|^Relay-Version:\\|^Message-ID:\\|^Nf-ID:\\|^Nf-From:\\|^Approved:\\|^Sender:" 111 "All random fields within the header of a message.") 112 113(defvar news-mode-map nil) 114(defvar news-read-first-time-p t) 115;; Contains the (dotified) news groups of which you are a member. 116(defvar news-user-group-list nil) 117 118(defvar news-current-news-group nil) 119(defvar news-current-group-begin nil) 120(defvar news-current-group-end nil) 121(defvar news-current-certifications nil 122 "An assoc list of a group name and the time at which it is 123known that the group had no new traffic") 124(defvar news-current-certifiable nil 125 "The time when the directory we are now working on was written") 126 127(defvar news-message-filter nil 128 "User specifiable filter function that will be called during 129formatting of the news file") 130 131;(defvar news-mode-group-string "Starting-Up" 132; "Mode line group name info is held in this variable") 133(defvar news-list-of-files nil 134 "Global variable in which we store the list of files 135associated with the current newsgroup") 136(defvar news-list-of-files-possibly-bogus nil 137 "variable indicating we only are guessing at which files are available. 138Not currently used.") 139 140;; association list in which we store lists of the form 141;; (pointified-group-name (first last old-last)) 142(defvar news-group-article-assoc nil) 143 144(defvar news-current-message-number 0 "Displayed Article Number") 145(defvar news-total-current-group 0 "Total no of messages in group") 146 147(defvar news-unsubscribe-groups ()) 148(defvar news-point-pdl () "List of visited news messages.") 149(defvar news-no-jumps-p t) 150(defvar news-buffer () "Buffer into which news files are read.") 151 152(defmacro news-push (item ref) 153 (list 'setq ref (list 'cons item ref))) 154 155(defmacro news-cadr (x) (list 'car (list 'cdr x))) 156(defmacro news-cdar (x) (list 'cdr (list 'car x))) 157(defmacro news-caddr (x) (list 'car (list 'cdr (list 'cdr x)))) 158(defmacro news-cadar (x) (list 'car (list 'cdr (list 'car x)))) 159(defmacro news-caadr (x) (list 'car (list 'car (list 'cdr x)))) 160(defmacro news-cdadr (x) (list 'cdr (list 'car (list 'cdr x)))) 161 162(defmacro news-wins (pfx index) 163 `(file-exists-p (concat ,pfx "/" (int-to-string ,index)))) 164 165(defvar news-max-plausible-gap 2 166 "* In an rnews directory, the maximum possible gap size. 167A gap is a sequence of missing messages between two messages that exist. 168An empty file does not contribute to a gap -- it ends one.") 169 170(defun news-find-first-and-last (prefix base) 171 (and (news-wins prefix base) 172 (cons (news-find-first-or-last prefix base -1) 173 (news-find-first-or-last prefix base 1)))) 174 175(defmacro news-/ (a1 a2) 176;; a form of / that guarantees that (/ -1 2) = 0 177 (if (zerop (/ -1 2)) 178 `(/ ,a1 ,a2) 179 `(if (< ,a1 0) 180 (- (/ (- ,a1) ,a2)) 181 (/ ,a1 ,a2)))) 182 183(defun news-find-first-or-last (pfx base dirn) 184 ;; first use powers of two to find a plausible ceiling 185 (let ((original-dir dirn)) 186 (while (news-wins pfx (+ base dirn)) 187 (setq dirn (* dirn 2))) 188 (setq dirn (news-/ dirn 2)) 189 ;; Then use a binary search to find the high water mark 190 (let ((offset (news-/ dirn 2))) 191 (while (/= offset 0) 192 (if (news-wins pfx (+ base dirn offset)) 193 (setq dirn (+ dirn offset))) 194 (setq offset (news-/ offset 2)))) 195 ;; If this high-water mark is bogus, recurse. 196 (let ((offset (* news-max-plausible-gap original-dir))) 197 (while (and (/= offset 0) (not (news-wins pfx (+ base dirn offset)))) 198 (setq offset (- offset original-dir))) 199 (if (= offset 0) 200 (+ base dirn) 201 (news-find-first-or-last pfx (+ base dirn offset) original-dir))))) 202 203(defun rnews () 204"Read USENET news for groups for which you are a member and add or 205delete groups. 206You can reply to articles posted and send articles to any group. 207 208Type \\[describe-mode] once reading news to get a list of rnews commands." 209 (interactive) 210 (let ((last-buffer (buffer-name))) 211 (make-local-variable 'rmail-last-file) 212 (switch-to-buffer (setq news-buffer (get-buffer-create "*news*"))) 213 (news-mode) 214 (setq news-buffer-save last-buffer) 215 (setq buffer-read-only nil) 216 (erase-buffer) 217 (setq buffer-read-only t) 218 (set-buffer-modified-p t) 219 (sit-for 0) 220 (message "Getting new USENET news...") 221 (news-set-mode-line) 222 (news-get-certifications) 223 (news-get-new-news))) 224 225(defun news-group-certification (group) 226 (cdr-safe (assoc group news-current-certifications))) 227 228 229(defun news-set-current-certifiable () 230 ;; Record the date that corresponds to the directory you are about to check 231 (let ((file (concat news-path 232 (string-subst-char ?/ ?. news-current-news-group)))) 233 (setq news-current-certifiable 234 (nth 5 (file-attributes 235 (or (file-symlink-p file) file)))))) 236 237(defun news-get-certifications () 238 ;; Read the certified-read file from last session 239 (save-excursion 240 (save-window-excursion 241 (setq news-current-certifications 242 (car-safe 243 (condition-case var 244 (let* 245 ((file (substitute-in-file-name news-certification-file)) 246 (buf (find-file-noselect file))) 247 (and (file-exists-p file) 248 (progn 249 (switch-to-buffer buf 'norecord) 250 (unwind-protect 251 (read-from-string (buffer-string)) 252 (kill-buffer buf))))) 253 (error nil))))))) 254 255(defun news-write-certifications () 256 ;; Write a certification file. 257 ;; This is an assoc list of group names with doubletons that represent 258 ;; mod times of the directory when group is read completely. 259 (save-excursion 260 (save-window-excursion 261 (with-output-to-temp-buffer 262 "*CeRtIfIcAtIoNs*" 263 (print news-current-certifications)) 264 (let ((buf (get-buffer "*CeRtIfIcAtIoNs*"))) 265 (switch-to-buffer buf) 266 (write-file (substitute-in-file-name news-certification-file)) 267 (kill-buffer buf))))) 268 269(defun news-set-current-group-certification () 270 (let ((cgc (assoc news-current-news-group news-current-certifications))) 271 (if cgc (setcdr cgc news-current-certifiable) 272 (news-push (cons news-current-news-group news-current-certifiable) 273 news-current-certifications)))) 274 275(defun news-set-minor-modes () 276 "Creates a minor mode list that has group name, total articles, 277and attribute for current article." 278 (setq news-minor-modes (list (cons 'foo 279 (concat news-current-message-number 280 "/" 281 news-total-current-group 282 (news-get-attribute-string))))) 283 ;; Detect Emacs versions 18.16 and up, which display 284 ;; directly from news-minor-modes by using a list for mode-name. 285 (or (boundp 'minor-mode-alist) 286 (setq minor-modes news-minor-modes))) 287 288(defun news-set-message-counters () 289 "Scan through current news-groups filelist to figure out how many messages 290are there. Set counters for use with minor mode display." 291 (if (null news-list-of-files) 292 (setq news-current-message-number 0))) 293 294(if news-mode-map 295 nil 296 (setq news-mode-map (make-keymap)) 297 (suppress-keymap news-mode-map) 298 (define-key news-mode-map "." 'beginning-of-buffer) 299 (define-key news-mode-map " " 'scroll-up) 300 (define-key news-mode-map "\177" 'scroll-down) 301 (define-key news-mode-map "n" 'news-next-message) 302 (define-key news-mode-map "c" 'news-make-link-to-message) 303 (define-key news-mode-map "p" 'news-previous-message) 304 (define-key news-mode-map "j" 'news-goto-message) 305 (define-key news-mode-map "q" 'news-exit) 306 (define-key news-mode-map "e" 'news-exit) 307 (define-key news-mode-map "\ej" 'news-goto-news-group) 308 (define-key news-mode-map "\en" 'news-next-group) 309 (define-key news-mode-map "\ep" 'news-previous-group) 310 (define-key news-mode-map "l" 'news-list-news-groups) 311 (define-key news-mode-map "?" 'describe-mode) 312 (define-key news-mode-map "g" 'news-get-new-news) 313 (define-key news-mode-map "f" 'news-reply) 314 (define-key news-mode-map "m" 'news-mail-other-window) 315 (define-key news-mode-map "a" 'news-post-news) 316 (define-key news-mode-map "r" 'news-mail-reply) 317 (define-key news-mode-map "o" 'news-save-item-in-file) 318 (define-key news-mode-map "\C-o" 'rmail-output) 319 (define-key news-mode-map "t" 'news-show-all-headers) 320 (define-key news-mode-map "x" 'news-force-update) 321 (define-key news-mode-map "A" 'news-add-news-group) 322 (define-key news-mode-map "u" 'news-unsubscribe-current-group) 323 (define-key news-mode-map "U" 'news-unsubscribe-group) 324 (define-key news-mode-map "\C-c\C-r" 'news-caesar-buffer-body)) 325 326(defun news-mode () 327 "News Mode is used by M-x rnews for reading USENET Newsgroups articles. 328New readers can find additional help in newsgroup: news.announce.newusers . 329All normal editing commands are turned off. 330Instead, these commands are available: 331 332. move point to front of this news article (same as Meta-<). 333Space scroll to next screen of this news article. 334Delete scroll down previous page of this news article. 335n move to next news article, possibly next group. 336p move to previous news article, possibly previous group. 337j jump to news article specified by numeric position. 338M-j jump to news group. 339M-n goto next news group. 340M-p goto previous news group. 341l list all the news groups with current status. 342? print this help message. 343C-c C-r caesar rotate all letters by 13 places in the article's body (rot13). 344g get new USENET news. 345f post a reply article to USENET. 346a post an original news article. 347A add a newsgroup. 348o save the current article in the named file (append if file exists). 349C-o output this message to a Unix-format mail file (append it). 350c \"copy\" (actually link) current or prefix-arg msg to file. 351 warning: target directory and message file must be on same device 352 (UNIX magic) 353t show all the headers this news article originally had. 354q quit reading news after updating .newsrc file. 355e exit updating .newsrc file. 356m mail a news article. Same as C-x 4 m. 357x update last message seen to be the current message. 358r mail a reply to this news article. Like m but initializes some fields. 359u unsubscribe from current newsgroup. 360U unsubscribe from specified newsgroup." 361 (interactive) 362 (kill-all-local-variables) 363 (make-local-variable 'news-read-first-time-p) 364 (setq news-read-first-time-p t) 365 (make-local-variable 'news-current-news-group) 366; (setq news-current-news-group "??") 367 (make-local-variable 'news-current-group-begin) 368 (setq news-current-group-begin 0) 369 (make-local-variable 'news-current-message-number) 370 (setq news-current-message-number 0) 371 (make-local-variable 'news-total-current-group) 372 (make-local-variable 'news-buffer-save) 373 (make-local-variable 'version-control) 374 (setq version-control 'never) 375 (make-local-variable 'news-point-pdl) 376; This breaks it. I don't have time to figure out why. -- RMS 377; (make-local-variable 'news-group-article-assoc) 378 (setq major-mode 'news-mode) 379 (setq mode-line-process '(news-minor-modes)) 380 (setq mode-name "NEWS") 381 (news-set-mode-line) 382 (set-syntax-table text-mode-syntax-table) 383 (use-local-map news-mode-map) 384 (setq local-abbrev-table text-mode-abbrev-table) 385 (run-mode-hooks 'news-mode-hook)) 386 387(defun string-subst-char (new old string) 388 (let (index) 389 (setq old (regexp-quote (char-to-string old)) 390 string (substring string 0)) 391 (while (setq index (string-match old string)) 392 (aset string index new))) 393 string) 394 395;; update read message number 396(defmacro news-update-message-read (ngroup nno) 397 (list 'setcar 398 (list 'news-cdadr 399 (list 'assoc ngroup 'news-group-article-assoc)) 400 nno)) 401 402(defun news-parse-range (number-string) 403 "Parse string representing range of numbers of he form <a>-<b> 404to a list (a . b)" 405 (let ((n (string-match "-" number-string))) 406 (if n 407 (cons (string-to-number (substring number-string 0 n)) 408 (string-to-number (substring number-string (1+ n)))) 409 (setq n (string-to-number number-string)) 410 (cons n n)))) 411 412;(defun is-in (elt lis) 413; (catch 'foo 414; (while lis 415; (if (equal (car lis) elt) 416; (throw 'foo t) 417; (setq lis (cdr lis)))))) 418 419(defun news-get-new-news () 420 "Get new USENET news, if there is any for the current user." 421 (interactive) 422 (if (not (null news-user-group-list)) 423 (news-update-newsrc-file)) 424 (setq news-group-article-assoc ()) 425 (setq news-user-group-list ()) 426 (message "Looking up %s file..." news-startup-file) 427 (let ((file (substitute-in-file-name news-startup-file)) 428 (temp-user-groups ())) 429 (save-excursion 430 (let ((newsrcbuf (find-file-noselect file)) 431 start end endofline tem) 432 (set-buffer newsrcbuf) 433 (goto-char 0) 434 (while (search-forward ": " nil t) 435 (setq end (point)) 436 (beginning-of-line) 437 (setq start (point)) 438 (end-of-line) 439 (setq endofline (point)) 440 (setq tem (buffer-substring start (- end 2))) 441 (let ((range (news-parse-range 442 (buffer-substring end endofline)))) 443 (if (assoc tem news-group-article-assoc) 444 (message "You are subscribed twice to %s; I ignore second" 445 tem) 446 (setq temp-user-groups (cons tem temp-user-groups) 447 news-group-article-assoc 448 (cons (list tem (list (car range) 449 (cdr range) 450 (cdr range))) 451 news-group-article-assoc))))) 452 (kill-buffer newsrcbuf))) 453 (setq temp-user-groups (nreverse temp-user-groups)) 454 (message "Prefrobnicating...") 455 (switch-to-buffer news-buffer) 456 (setq news-user-group-list temp-user-groups) 457 (while (and temp-user-groups 458 (not (news-read-files-into-buffer 459 (car temp-user-groups) nil))) 460 (setq temp-user-groups (cdr temp-user-groups))) 461 (if (null temp-user-groups) 462 (message "No news is good news.") 463 (message "")))) 464 465(defun news-list-news-groups () 466 "Display all the news groups to which you belong." 467 (interactive) 468 (with-output-to-temp-buffer "*Newsgroups*" 469 (save-excursion 470 (set-buffer standard-output) 471 (insert 472 "News Group Msg No. News Group Msg No.\n") 473 (insert 474 "------------------------- -------------------------\n") 475 (let ((temp news-user-group-list) 476 (flag nil)) 477 (while temp 478 (let ((item (assoc (car temp) news-group-article-assoc))) 479 (insert (car item)) 480 (indent-to (if flag 52 20)) 481 (insert (int-to-string (news-cadr (news-cadr item)))) 482 (if flag 483 (insert "\n") 484 (indent-to 33)) 485 (setq temp (cdr temp) flag (not flag)))))))) 486 487;; Mode line hack 488(defun news-set-mode-line () 489 "Set mode line string to something useful." 490 (setq mode-line-process 491 (concat " " 492 (if (integerp news-current-message-number) 493 (int-to-string news-current-message-number) 494 "??") 495 "/" 496 (if (integerp news-current-group-end) 497 (int-to-string news-current-group-end) 498 news-current-group-end))) 499 (setq mode-line-buffer-identification 500 (concat "NEWS: " 501 news-current-news-group 502 ;; Enough spaces to pad group name to 17 positions. 503 (substring " " 504 0 (max 0 (- 17 (length news-current-news-group)))))) 505 (set-buffer-modified-p t) 506 (sit-for 0)) 507 508(defun news-goto-news-group (gp) 509 "Takes a string and goes to that news group." 510 (interactive (list (completing-read "NewsGroup: " 511 news-group-article-assoc))) 512 (message "Jumping to news group %s..." gp) 513 (news-select-news-group gp) 514 (message "Jumping to news group %s... done." gp)) 515 516(defun news-select-news-group (gp) 517 (let ((grp (assoc gp news-group-article-assoc))) 518 (if (null grp) 519 (error "Group %s not subscribed to" gp) 520 (progn 521 (news-update-message-read news-current-news-group 522 (news-cdar news-point-pdl)) 523 (news-read-files-into-buffer (car grp) nil) 524 (news-set-mode-line))))) 525 526(defun news-goto-message (arg) 527 "Goes to the article ARG in current newsgroup." 528 (interactive "p") 529 (if (null current-prefix-arg) 530 (setq arg (read-no-blanks-input "Go to article: " ""))) 531 (news-select-message arg)) 532 533(defun news-select-message (arg) 534 (if (stringp arg) (setq arg (string-to-number arg))) 535 (let ((file (concat news-path 536 (string-subst-char ?/ ?. news-current-news-group) 537 "/" arg))) 538 (if (= arg 539 (or (news-cadr (memq (news-cdar news-point-pdl) news-list-of-files)) 540 0)) 541 (setcdr (car news-point-pdl) arg)) 542 (setq news-current-message-number arg) 543 (if (file-exists-p file) 544 (let ((buffer-read-only nil)) 545 (news-read-in-file file) 546 (news-set-mode-line)) 547 (news-set-mode-line) 548 (error "Article %d nonexistent" arg)))) 549 550(defun news-force-update () 551 "updates the position of last article read in the current news group" 552 (interactive) 553 (setcdr (car news-point-pdl) news-current-message-number) 554 (message "Updated to %d" news-current-message-number)) 555 556(defun news-next-message (arg) 557 "Move ARG messages forward within one newsgroup. 558Negative ARG moves backward. 559If ARG is 1 or -1, moves to next or previous newsgroup if at end." 560 (interactive "p") 561 (let ((no (+ arg news-current-message-number))) 562 (if (or (< no news-current-group-begin) 563 (> no news-current-group-end)) 564 (cond ((= arg 1) 565 (news-set-current-group-certification) 566 (news-next-group)) 567 ((= arg -1) 568 (news-previous-group)) 569 (t (error "Article out of range"))) 570 (let ((plist (news-get-motion-lists 571 news-current-message-number 572 news-list-of-files))) 573 (if (< arg 0) 574 (news-select-message (nth (1- (- arg)) (car (cdr plist)))) 575 (news-select-message (nth (1- arg) (car plist)))))))) 576 577(defun news-previous-message (arg) 578 "Move ARG messages backward in current newsgroup. 579With no arg or arg of 1, move one message 580and move to previous newsgroup if at beginning. 581A negative ARG means move forward." 582 (interactive "p") 583 (news-next-message (- arg))) 584 585(defun news-move-to-group (arg) 586 "Given arg move forward or backward to a new newsgroup." 587 (let ((cg news-current-news-group)) 588 (let ((plist (news-get-motion-lists cg news-user-group-list)) 589 ngrp) 590 (if (< arg 0) 591 (or (setq ngrp (nth (1- (- arg)) (news-cadr plist))) 592 (error "No previous news groups")) 593 (or (setq ngrp (nth arg (car plist))) 594 (error "No more news groups"))) 595 (news-select-news-group ngrp)))) 596 597(defun news-next-group () 598 "Moves to the next user group." 599 (interactive) 600; (message "Moving to next group...") 601 (news-move-to-group 0) 602 (while (null news-list-of-files) 603 (news-move-to-group 0))) 604; (message "Moving to next group... done.") 605 606(defun news-previous-group () 607 "Moves to the previous user group." 608 (interactive) 609; (message "Moving to previous group...") 610 (news-move-to-group -1) 611 (while (null news-list-of-files) 612 (news-move-to-group -1))) 613; (message "Moving to previous group... done.") 614 615(defun news-get-motion-lists (arg listy) 616 "Given a msgnumber/group this will return a list of two lists; 617one for moving forward and one for moving backward." 618 (let ((temp listy) 619 (result ())) 620 (catch 'out 621 (while temp 622 (if (equal (car temp) arg) 623 (throw 'out (cons (cdr temp) (list result))) 624 (setq result (nconc (list (car temp)) result)) 625 (setq temp (cdr temp))))))) 626 627;; miscellaneous io routines 628(defun news-read-in-file (filename) 629 (erase-buffer) 630 (let ((start (point))) 631 (insert-file-contents filename) 632 (news-convert-format) 633 ;; Run each hook that applies to the current newsgroup. 634 (let ((hooks news-group-hook-alist)) 635 (while hooks 636 (goto-char start) 637 (if (string-match (car (car hooks)) news-group-name) 638 (funcall (cdr (car hooks)))) 639 (setq hooks (cdr hooks)))) 640 (goto-char start) 641 (forward-line 1) 642 (if (eobp) 643 (message "(Empty file?)") 644 (goto-char start)))) 645 646(defun news-convert-format () 647 (save-excursion 648 (save-restriction 649 (let* ((start (point)) 650 (end (condition-case () 651 (progn (search-forward "\n\n") (point)) 652 (error nil))) 653 has-from has-date) 654 (cond (end 655 (narrow-to-region start end) 656 (goto-char start) 657 (setq has-from (search-forward "\nFrom:" nil t)) 658 (cond ((and (not has-from) has-date) 659 (goto-char start) 660 (search-forward "\nDate:") 661 (beginning-of-line) 662 (kill-line) (kill-line))) 663 (news-delete-headers start) 664 (goto-char start))))))) 665 666(defun news-show-all-headers () 667 "Redisplay current news item with all original headers" 668 (interactive) 669 (let (news-ignored-headers 670 (buffer-read-only ())) 671 (erase-buffer) 672 (news-set-mode-line) 673 (news-read-in-file 674 (concat news-path 675 (string-subst-char ?/ ?. news-current-news-group) 676 "/" (int-to-string news-current-message-number))))) 677 678(defun news-delete-headers (pos) 679 (goto-char pos) 680 (and (stringp news-ignored-headers) 681 (while (re-search-forward news-ignored-headers nil t) 682 (beginning-of-line) 683 (delete-region (point) 684 (progn (re-search-forward "\n[^ \t]") 685 (forward-char -1) 686 (point)))))) 687 688(defun news-exit () 689 "Quit news reading session and update the .newsrc file." 690 (interactive) 691 (if (y-or-n-p "Do you really wanna quit reading news ? ") 692 (progn (message "Updating %s..." news-startup-file) 693 (news-update-newsrc-file) 694 (news-write-certifications) 695 (message "Updating %s... done" news-startup-file) 696 (message "Now do some real work") 697 (quit-window) 698 (switch-to-buffer news-buffer-save) 699 (setq news-user-group-list ())) 700 (message ""))) 701 702(defun news-update-newsrc-file () 703 "Updates the .newsrc file in the users home dir." 704 (let ((newsrcbuf (find-file-noselect 705 (substitute-in-file-name news-startup-file))) 706 (tem news-user-group-list) 707 group) 708 (save-excursion 709 (if (not (null news-current-news-group)) 710 (news-update-message-read news-current-news-group 711 (news-cdar news-point-pdl))) 712 (set-buffer newsrcbuf) 713 (while tem 714 (setq group (assoc (car tem) news-group-article-assoc)) 715 (if (= (news-cadr (news-cadr group)) (news-caddr (news-cadr group))) 716 nil 717 (goto-char 0) 718 (if (search-forward (concat (car group) ": ") nil t) 719 (kill-line nil) 720 (insert (car group) ": \n") (backward-char 1)) 721 (insert (int-to-string (car (news-cadr group))) "-" 722 (int-to-string (news-cadr (news-cadr group))))) 723 (setq tem (cdr tem))) 724 (while news-unsubscribe-groups 725 (setq group (assoc (car news-unsubscribe-groups) 726 news-group-article-assoc)) 727 (goto-char 0) 728 (if (search-forward (concat (car group) ": ") nil t) 729 (progn 730 (backward-char 2) 731 (kill-line nil) 732 (insert "! " (int-to-string (car (news-cadr group))) 733 "-" (int-to-string (news-cadr (news-cadr group)))))) 734 (setq news-unsubscribe-groups (cdr news-unsubscribe-groups))) 735 (save-buffer) 736 (kill-buffer (current-buffer))))) 737 738 739(defun news-unsubscribe-group (group) 740 "Removes you from newgroup GROUP." 741 (interactive (list (completing-read "Unsubscribe from group: " 742 news-group-article-assoc))) 743 (news-unsubscribe-internal group)) 744 745(defun news-unsubscribe-current-group () 746 "Removes you from the newsgroup you are now reading." 747 (interactive) 748 (if (y-or-n-p "Do you really want to unsubscribe from this group ? ") 749 (news-unsubscribe-internal news-current-news-group))) 750 751(defun news-unsubscribe-internal (group) 752 (let ((tem (assoc group news-group-article-assoc))) 753 (if tem 754 (progn 755 (setq news-unsubscribe-groups (cons group news-unsubscribe-groups)) 756 (news-update-message-read group (news-cdar news-point-pdl)) 757 (if (equal group news-current-news-group) 758 (news-next-group)) 759 (message "")) 760 (error "Not subscribed to group: %s" group)))) 761 762(defun news-save-item-in-file (file) 763 "Save the current article that is being read by appending to a file." 764 (interactive "FSave item in file: ") 765 (append-to-file (point-min) (point-max) file)) 766 767(defun news-get-pruned-list-of-files (gp-list end-file-no) 768 "Given a news group it finds all files in the news group. 769The arg must be in slashified format. 770Using ls was found to be too slow in a previous version." 771 (let 772 ((answer 773 (and 774 (not (and end-file-no 775 (equal (news-set-current-certifiable) 776 (news-group-certification gp-list)) 777 (setq news-list-of-files nil 778 news-list-of-files-possibly-bogus t))) 779 (let* ((file-directory (concat news-path 780 (string-subst-char ?/ ?. gp-list))) 781 tem 782 (last-winner 783 (and end-file-no 784 (news-wins file-directory end-file-no) 785 (news-find-first-or-last file-directory end-file-no 1)))) 786 (setq news-list-of-files-possibly-bogus t news-list-of-files nil) 787 (if last-winner 788 (progn 789 (setq news-list-of-files-possibly-bogus t 790 news-current-group-end last-winner) 791 (while (> last-winner end-file-no) 792 (news-push last-winner news-list-of-files) 793 (setq last-winner (1- last-winner))) 794 news-list-of-files) 795 (if (or (not (file-directory-p file-directory)) 796 (not (file-readable-p file-directory))) 797 nil 798 (setq news-list-of-files 799 (condition-case error 800 (directory-files file-directory) 801 (file-error 802 (if (string= (nth 2 error) "permission denied") 803 (message "Newsgroup %s is read-protected" 804 gp-list) 805 (signal 'file-error (cdr error))) 806 nil))) 807 (setq tem news-list-of-files) 808 (while tem 809 (if (or (not (string-match "^[0-9]*$" (car tem))) 810 ;; don't get confused by directories that look like numbers 811 (file-directory-p 812 (concat file-directory "/" (car tem))) 813 (<= (string-to-number (car tem)) end-file-no)) 814 (setq news-list-of-files 815 (delq (car tem) news-list-of-files))) 816 (setq tem (cdr tem))) 817 (if (null news-list-of-files) 818 (progn (setq news-current-group-end 0) 819 nil) 820 (setq news-list-of-files 821 (mapcar 'string-to-number news-list-of-files)) 822 (setq news-list-of-files (sort news-list-of-files '<)) 823 (setq news-current-group-end 824 (elt news-list-of-files 825 (1- (length news-list-of-files)))) 826 news-list-of-files))))))) 827 (or answer (progn (news-set-current-group-certification) nil)))) 828 829(defun news-read-files-into-buffer (group reversep) 830 (let* ((files-start-end (news-cadr (assoc group news-group-article-assoc))) 831 (start-file-no (car files-start-end)) 832 (end-file-no (news-cadr files-start-end)) 833 (buffer-read-only nil)) 834 (setq news-current-news-group group) 835 (setq news-current-message-number nil) 836 (setq news-current-group-end nil) 837 (news-set-mode-line) 838 (news-get-pruned-list-of-files group end-file-no) 839 (news-set-mode-line) 840 ;; @@ should be a lot smarter than this if we have to move 841 ;; @@ around correctly. 842 (setq news-point-pdl (list (cons (car files-start-end) 843 (news-cadr files-start-end)))) 844 (if (null news-list-of-files) 845 (progn (erase-buffer) 846 (setq news-current-group-end end-file-no) 847 (setq news-current-group-begin end-file-no) 848 (setq news-current-message-number end-file-no) 849 (news-set-mode-line) 850; (message "No new articles in " group " group.") 851 nil) 852 (setq news-current-group-begin (car news-list-of-files)) 853 (if reversep 854 (setq news-current-message-number news-current-group-end) 855 (if (> (car news-list-of-files) end-file-no) 856 (setcdr (car news-point-pdl) (car news-list-of-files))) 857 (setq news-current-message-number news-current-group-begin)) 858 (news-set-message-counters) 859 (news-set-mode-line) 860 (news-read-in-file (concat news-path 861 (string-subst-char ?/ ?. group) 862 "/" 863 (int-to-string 864 news-current-message-number))) 865 (news-set-message-counters) 866 (news-set-mode-line) 867 t))) 868 869(defun news-add-news-group (gp) 870 "Resubscribe to or add a USENET news group named GROUP (a string)." 871; @@ (completing-read ...) 872; @@ could be based on news library file ../active (slightly fascist) 873; @@ or (expensive to compute) all directories under the news spool directory 874 (interactive "sAdd news group: ") 875 (let ((file-dir (concat news-path (string-subst-char ?/ ?. gp)))) 876 (save-excursion 877 (if (null (assoc gp news-group-article-assoc)) 878 (let ((newsrcbuf (find-file-noselect 879 (substitute-in-file-name news-startup-file)))) 880 (if (file-directory-p file-dir) 881 (progn 882 (switch-to-buffer newsrcbuf) 883 (goto-char 0) 884 (if (search-forward (concat gp "! ") nil t) 885 (progn 886 (message "Re-subscribing to group %s." gp) 887 ;;@@ news-unsubscribe-groups isn't being used 888 ;;(setq news-unsubscribe-groups 889 ;; (delq gp news-unsubscribe-groups)) 890 (backward-char 2) 891 (delete-char 1) 892 (insert ":")) 893 (progn 894 (message 895 "Added %s to your list of newsgroups." gp) 896 (goto-char (point-max)) 897 (insert gp ": 1-1\n"))) 898 (search-backward gp nil t) 899 (let (start end endofline tem) 900 (search-forward ": " nil t) 901 (setq end (point)) 902 (beginning-of-line) 903 (setq start (point)) 904 (end-of-line) 905 (setq endofline (point)) 906 (setq tem (buffer-substring start (- end 2))) 907 (let ((range (news-parse-range 908 (buffer-substring end endofline)))) 909 (setq news-group-article-assoc 910 (cons (list tem (list (car range) 911 (cdr range) 912 (cdr range))) 913 news-group-article-assoc)))) 914 (save-buffer) 915 (kill-buffer (current-buffer))) 916 (message "Newsgroup %s doesn't exist." gp))) 917 (message "Already subscribed to group %s." gp))))) 918 919(defun news-make-link-to-message (number newname) 920 "Forges a link to an rnews message numbered number (current if no arg) 921Good for hanging on to a message that might or might not be 922automatically deleted." 923 (interactive "P 924FName to link to message: ") 925 (add-name-to-file 926 (concat news-path 927 (string-subst-char ?/ ?. news-current-news-group) 928 "/" (if number 929 (prefix-numeric-value number) 930 news-current-message-number)) 931 newname)) 932 933;;; caesar-region written by phr@gnu.org Nov 86 934;;; modified by tower@gnu.org Nov 86 935(defun caesar-region (&optional n) 936 "Caesar rotation of region by N, default 13, for decrypting netnews." 937 (interactive (if current-prefix-arg ; Was there a prefix arg? 938 (list (prefix-numeric-value current-prefix-arg)) 939 (list nil))) 940 (cond ((not (numberp n)) (setq n 13)) 941 (t (setq n (mod n 26)))) ;canonicalize N 942 (if (not (zerop n)) ; no action needed for a rot of 0 943 (progn 944 (if (or (not (boundp 'caesar-translate-table)) 945 (/= (aref caesar-translate-table ?a) (+ ?a n))) 946 (let ((i 0) (lower "abcdefghijklmnopqrstuvwxyz") upper) 947 (message "Building caesar-translate-table...") 948 (setq caesar-translate-table (make-vector 256 0)) 949 (while (< i 256) 950 (aset caesar-translate-table i i) 951 (setq i (1+ i))) 952 (setq lower (concat lower lower) upper (upcase lower) i 0) 953 (while (< i 26) 954 (aset caesar-translate-table (+ ?a i) (aref lower (+ i n))) 955 (aset caesar-translate-table (+ ?A i) (aref upper (+ i n))) 956 (setq i (1+ i))) 957 (message "Building caesar-translate-table... done"))) 958 (let ((from (region-beginning)) 959 (to (region-end)) 960 (i 0) str len) 961 (setq str (buffer-substring from to)) 962 (setq len (length str)) 963 (while (< i len) 964 (aset str i (aref caesar-translate-table (aref str i))) 965 (setq i (1+ i))) 966 (goto-char from) 967 (kill-region from to) 968 (insert str))))) 969 970;;; news-caesar-buffer-body written by paul@media-lab.mit.edu Wed Oct 1, 1986 971;;; hacked further by tower@gnu.org 972(defun news-caesar-buffer-body (&optional rotnum) 973 "Caesar rotates all letters in the current buffer by 13 places. 974Used to encode/decode possibly offensive messages (commonly in net.jokes). 975With prefix arg, specifies the number of places to rotate each letter forward. 976Mail and USENET news headers are not rotated." 977 (interactive (if current-prefix-arg ; Was there a prefix arg? 978 (list (prefix-numeric-value current-prefix-arg)) 979 (list nil))) 980 (save-excursion 981 (let ((buffer-status buffer-read-only)) 982 (setq buffer-read-only nil) 983 ;; setup the region 984 (set-mark (if (equal major-mode 'news-mode) 985 (progn (goto-char (point-min)) 986 (search-forward "\n\n" nil t)) 987 (mail-text-start))) 988 (goto-char (point-max)) 989 (caesar-region rotnum) 990 (setq buffer-read-only buffer-status)))) 991 992(provide 'rnews) 993 994;;; arch-tag: c032a20b-cafb-466c-b3fa-5be404a18f8c 995;;; rnews.el ends here 996