rmailout.el 20 KB
Newer Older
1 2 3 4 5 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
;;; rmailout.el --- "RMAIL" mail reader for Emacs: output message to a file

;; Copyright (C) 1985, 1987, 1993, 1994, 2001, 2002, 2003, 2004, 2005,
;;   2006, 2007, 2008, 2009  Free Software Foundation, Inc.

;; Maintainer: FSF
;; Keywords: mail

;; 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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;;; Code:

(require 'rmail)
(provide 'rmailout)

(defcustom rmail-output-decode-coding nil
32
  "If non-nil, do coding system decoding when outputting message as Babyl."
33 34
  :type 'boolean
  :group 'rmail-output)
35 36

(defcustom rmail-output-file-alist nil
37
  "Alist matching regexps to suggested output Rmail files.
38 39 40 41 42 43 44 45 46 47 48
This is a list of elements of the form (REGEXP . NAME-EXP).
The suggestion is taken if REGEXP matches anywhere in the message buffer.
NAME-EXP may be a string constant giving the file name to use,
or more generally it may be any kind of expression that returns
a file name as a string."
  :type '(repeat (cons regexp
		       (choice :value ""
			       (string :tag "File Name")
			       sexp)))
  :group 'rmail-output)

49 50 51 52 53 54
(defcustom rmail-fields-not-to-output nil
  "Regexp describing fields to exclude when outputting a message to a file."
  :type '(choice (const :tag "None" nil)
		 regexp)
  :group 'rmail-output)

55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123
(defun rmail-output-read-file-name ()
  "Read the file name to use for `rmail-output'.
Set `rmail-default-file' to this name as well as returning it."
  (let ((default-file
	  (let (answer tail)
	    (setq tail rmail-output-file-alist)
	    ;; Suggest a file based on a pattern match.
	    (while (and tail (not answer))
	      (save-excursion
		(goto-char (point-min))
		(if (re-search-forward (car (car tail)) nil t)
		    (setq answer (eval (cdr (car tail)))))
		(setq tail (cdr tail))))
	    ;; If no suggestion, use same file as last time.
	    (or answer rmail-default-file))))
    (let ((read-file
	   (expand-file-name
	    (read-file-name
	     (concat "Output message to mail file (default "
		     (file-name-nondirectory default-file)
		     "): ")
	     (file-name-directory default-file)
	     (abbreviate-file-name default-file))
	    (file-name-directory default-file))))
      (setq rmail-default-file
	    (if (file-directory-p read-file)
		(expand-file-name (file-name-nondirectory default-file)
				  read-file)
	      (expand-file-name
	       (or read-file (file-name-nondirectory default-file))
	       (file-name-directory default-file)))))))

;; Delete from the buffer header fields we don't want output.
;; Buffer should be pre-narrowed to the header.
;; PRESERVE is a regexp for fields NEVER to delete.
(defun rmail-delete-unwanted-fields (preserve)
  (if rmail-fields-not-to-output
      (save-excursion
	(goto-char (point-min))
	(while (re-search-forward rmail-fields-not-to-output nil t)
	  (beginning-of-line)
	  (unless (looking-at preserve)
	    (delete-region (point)
			   (progn (forward-line 1) (point))))))))

(defun rmail-output-as-babyl (file-name nomsg)
  "Convert the current buffer's text to Babyl and output to FILE-NAME.
It alters the current buffer's text, so it should be a temp buffer."
  (let ((coding-system-for-write
	 'emacs-mule-unix))
    (save-restriction
      (goto-char (point-min))
      (search-forward "\n\n" nil 'move)
      (narrow-to-region (point-min) (point))
      (if rmail-fields-not-to-output
	  (rmail-delete-unwanted-fields nil)))

    ;; Convert to Babyl format.
    (rmail-convert-to-babyl-format)
    ;; Write it into the file, or its buffer.
    (let ((buf (find-buffer-visiting file-name))
	  (tembuf (current-buffer)))
      (if (null buf)
	  (write-region (point-min) (point-max) file-name t nomsg)
	(if (eq buf (current-buffer))
	    (error "Can't output message to same file it's already in"))
	;; File has been visited, in buffer BUF.
	(set-buffer buf)
	(let ((inhibit-read-only t)
124
	      (msg (bound-and-true-p rmail-current-message)))
125 126
	  ;; If MSG is non-nil, buffer is in RMAIL mode.
	  (if msg
127
	      (rmail-output-to-babyl-buffer tembuf msg)
128 129 130 131 132
	    ;; Output file not in rmail mode => just insert at the end.
	    (narrow-to-region (point-min) (1+ (buffer-size)))
	    (goto-char (point-max))
	    (insert-buffer-substring tembuf)))))))

133
(defun rmail-output-to-babyl-buffer (tembuf msg)
134 135 136
  "Copy msg in TEMBUF from BEG to END into this old R-mail BABYL buffer.
Do what is necessary to make babyl R-mail know about the new message.
Then display message number MSG."
137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
  ;; Turn on Auto Save mode, if it's off in this
  ;; buffer but enabled by default.
  (and (not buffer-auto-save-file-name)
       auto-save-default
       (auto-save-mode t))
  (rmail-maybe-set-message-counters)
  (widen)
  (narrow-to-region (point-max) (point-max))
  (insert-buffer-substring tembuf)
  (goto-char (point-min))
  (widen)
  (search-backward "\n\^_")
  (narrow-to-region (point) (point-max))
  (rmail-count-new-messages t)
  (if (rmail-summary-exists)
      (rmail-select-summary
       (rmail-update-summary)))
  (rmail-show-message-1 msg))
155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304

(defun rmail-convert-to-babyl-format ()
  (let ((count 0) (start (point-min))
	(case-fold-search nil)
	(buffer-undo-list t))
    (goto-char (point-min))
    (save-restriction
      (unless (looking-at "^From ")
	(error "Invalid mbox message"))
      (insert "\^L\n0, unseen,,\n*** EOOH ***\n")
      (rmail-nuke-pinhead-header)
      ;; Decode base64 or quoted printable contents, Rmail style.
      (let* ((header-end (save-excursion
			   (and (re-search-forward "\n\n" nil t)
				(1- (point)))))
	     (case-fold-search t)
	     (quoted-printable-header-field-end
	      (save-excursion
		(re-search-forward
		 "^content-transfer-encoding:\\(\n?[\t ]\\)*quoted-printable\\(\n?[\t ]\\)*"
		 header-end t)))
	     (base64-header-field-end
	      (and
	       ;; Don't decode non-text data.
	       (save-excursion
		 (re-search-forward
		  "^content-type:\\(\n?[\t ]\\)\\(text\\|message\\)/"
		  header-end t))
	       (save-excursion
		 (re-search-forward
		  "^content-transfer-encoding:\\(\n?[\t ]\\)*base64\\(\n?[\t ]\\)*"
		  header-end t)))))

	(goto-char (point-max))
	(if quoted-printable-header-field-end
	    (save-excursion
	      (unless (mail-unquote-printable-region
		       header-end (point) nil t t)
		(message "Malformed MIME quoted-printable message"))
	      ;; Change "quoted-printable" to "8bit",
	      ;; to reflect the decoding we just did.
	      (goto-char quoted-printable-header-field-end)
	      (delete-region (point) (search-backward ":"))
	      (insert ": 8bit")))
	(if base64-header-field-end
	    (save-excursion
	      (when (condition-case nil
			(progn
			  (base64-decode-region
			   (1+ header-end)
			   (save-excursion
			     ;; Prevent base64-decode-region
			     ;; from removing newline characters.
			     (skip-chars-backward "\n\t ")
			     (point)))
			  t)
		      (error nil))
		;; Change "base64" to "8bit", to reflect the
		;; decoding we just did.
		(goto-char base64-header-field-end)
		(delete-region (point) (search-backward ":"))
		(insert ": 8bit")))))
      ;; Transform anything within the message text
      ;; that might appear to be the end of a Babyl-format message.
      (save-excursion
	(save-restriction
	  (narrow-to-region start (point))
	  (goto-char (point-min))
	  (while (search-forward "\n\^_" nil t) ; single char
	    (replace-match "\n^_"))))		; 2 chars: "^" and "_"
      ;; This is for malformed messages that don't end in newline.
      ;; There shouldn't be any, but some users say occasionally
      ;; there are some.
      (or (bolp) (newline))
      (insert ?\^_)
      (setq last-coding-system-used nil)
      ;; Decode coding system, following specs in the message header,
      ;; and record what coding system was decoded.
      (if rmail-output-decode-coding
	  (let ((mime-charset
		 (if (save-excursion
		       (goto-char start)
		       (search-forward "\n\n" nil t)
		       (let ((case-fold-search t))
			 (re-search-backward
			  rmail-mime-charset-pattern
			  start t)))
		     (intern (downcase (match-string 1))))))
	    (rmail-decode-region start (point) mime-charset)))
      (save-excursion
	(goto-char start)
	(forward-line 3)
	(insert "X-Coding-System: "
		(symbol-name last-coding-system-used)
		"\n")))))

;; Delete the "From ..." line, creating various other headers with
;; information from it if they don't already exist.  Now puts the
;; original line into a mail-from: header line for debugging and for
;; use by the rmail-output function.
(defun rmail-nuke-pinhead-header ()
  (save-excursion
    (save-restriction
      (let ((start (point))
  	    (end (progn
		   (condition-case ()
		       (search-forward "\n\n")
		     (error
		      (goto-char (point-max))
		      (insert "\n\n")))
		   (point)))
	    has-from has-date)
	(narrow-to-region start end)
	(let ((case-fold-search t))
	  (goto-char start)
	  (setq has-from (search-forward "\nFrom:" nil t))
	  (goto-char start)
	  (setq has-date (and (search-forward "\nDate:" nil t) (point)))
	  (goto-char start))
	(let ((case-fold-search nil))
	  (if (re-search-forward (concat "^" rmail-unix-mail-delimiter) nil t)
	      (replace-match
		(concat
		  "Mail-from: \\&"
		  ;; Keep and reformat the date if we don't
		  ;;  have a Date: field.
		  (if has-date
		      ""
		    (concat
		     "Date: \\2, \\4 \\3 \\9 \\5 "

		     ;; The timezone could be matched by group 7 or group 10.
		     ;; If neither of them matched, assume EST, since only
		     ;; Easterners would be so sloppy.
		     ;; It's a shame the substitution can't use "\\10".
		     (cond
		      ((/= (match-beginning 7) (match-end 7)) "\\7")
		      ((/= (match-beginning 10) (match-end 10))
		       (buffer-substring (match-beginning 10)
					 (match-end 10)))
		      (t "EST"))
		     "\n"))
		  ;; Keep and reformat the sender if we don't
		  ;; have a From: field.
		  (if has-from
		      ""
		    "From: \\1\n"))
		t)))))))

(defun rmail-output-as-mbox (file-name nomsg &optional as-seen)
305
  "Convert the current buffer's text to mbox and output to FILE-NAME.
306 307 308 309
It alters the current buffer's text, so call with a temp buffer current.
If FILE-NAME is visited, output into its buffer instead.
AS-SEEN is non-nil if we are copying the message \"as seen\"."
  (let ((case-fold-search t)
310 311
	from date)
    (goto-char (point-min))
312 313 314 315 316 317 318
    ;; Preserve the Mail-From and MIME-Version fields
    ;; even if they have been pruned.
    (search-forward "\n\n" nil 'move)
    (narrow-to-region (point-min) (point))
    (rmail-delete-unwanted-fields
     (if rmail-enable-mime "Mail-From"
       "Mail-From\\|MIME-Version\\|Content-type"))
319 320 321 322 323 324 325 326 327 328 329 330 331 332
    ;; Generate a From line from other header fields if necessary.
    ;; FIXME this duplicates code from unrmail.el.
    (goto-char (point-min))
    (unless (looking-at "From ")
      (setq from (or (mail-fetch-field "from")
		     (mail-fetch-field "really-from")
		     (mail-fetch-field "sender")
		     "unknown")
	    date (mail-fetch-field "date")
	    date (or (and date
			  (ignore-errors
			   (current-time-string (date-to-time date))))
		     (current-time-string)))
      (insert "From " (mail-strip-quoted-names from) " " date "\n"))
333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382
    (widen)
    ;; Make sure message ends with blank line.
    (goto-char (point-max))
    (unless (bolp)
       (insert "\n"))
    (unless (looking-back "\n\n")
      (insert "\n"))
    (goto-char (point-min))
    (let ((buf (find-buffer-visiting file-name))
	  (tembuf (current-buffer)))
      (if (null buf)
	  (let ((coding-system-for-write 'raw-text-unix))
	    (write-region (point-min) (point-max) file-name t nomsg))
	(if (eq buf (current-buffer))
	    (error "Can't output message to same file it's already in"))
	;; File has been visited, in buffer BUF.
	(set-buffer buf)
 	(let ((inhibit-read-only t)
	      (msg (and (boundp 'rmail-current-message)
			rmail-current-message)))
	  (and msg as-seen
	       (error "Can't output \"as seen\" to a visited Rmail file"))
	  (if msg
	      (rmail-output-to-rmail-buffer tembuf msg)
	    ;; Output file not in Rmail mode => just insert at the end.
	    (narrow-to-region (point-min) (1+ (buffer-size)))
	    (goto-char (point-max))
	    (insert-buffer-substring tembuf)))))))

;; Called only if rmail-summary-exists, which means rmailsum is loaded.
(declare-function rmail-update-summary "rmailsum" (&rest ignore))

(defun rmail-output-to-rmail-buffer (tembuf msg)
  "Copy msg in TEMBUF from BEG to END into this Rmail buffer.
Do what is necessary to make Rmail know about the new message.
Then display message number MSG."
  (save-excursion
    (rmail-swap-buffers-maybe)
    ;; Turn on Auto Save mode, if it's off in this
    ;; buffer but enabled by default.
    (and (not buffer-auto-save-file-name)
	 auto-save-default
	 (auto-save-mode t))
    (rmail-maybe-set-message-counters)
    (narrow-to-region (point-max) (point-max))
    (insert-buffer-substring tembuf)
    (rmail-count-new-messages t)
    (if (rmail-summary-exists)
	(rmail-select-summary
	 (rmail-update-summary)))
383
    (rmail-show-message-1 msg)))
384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399

;;; There are functions elsewhere in Emacs that use this function;
;;; look at them before you change the calling method.
;;;###autoload
(defun rmail-output (file-name &optional count noattribute from-gnus)
  "Append this message to mail file FILE-NAME.
This works with both mbox format and Babyl format files,
outputting in the appropriate format for each.
The default file name comes from `rmail-default-file',
which is updated to the name you use in this command.

A prefix argument COUNT says to output that many consecutive messages,
starting with the current one.  Deleted messages are skipped and don't count.
When called from Lisp code, COUNT may be omitted and defaults to 1.

This command always outputs the complete message header,
400
even if the header display is currently pruned.
401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447

The optional third argument NOATTRIBUTE, if non-nil, says not
to set the `filed' attribute, and not to display a message.

The optional fourth argument FROM-GNUS is set when called from GNUS."
  (interactive
   (list (rmail-output-read-file-name)
	 (prefix-numeric-value current-prefix-arg)))
  (or count (setq count 1))
  (setq file-name
	(expand-file-name file-name
			  (and rmail-default-file
			       (file-name-directory rmail-default-file))))

  ;; Warn about creating new file.
  (or (find-buffer-visiting file-name)
      (file-exists-p file-name)
      (yes-or-no-p
       (concat "\"" file-name "\" does not exist, create it? "))
      (error "Output file does not exist"))

  (set-buffer rmail-buffer)

  (let ((orig-count count)
	(case-fold-search t)
	(tembuf (get-buffer-create " rmail-output"))
	(babyl-format
	 (and (file-readable-p file-name) (mail-file-babyl-p file-name))))

    (unwind-protect
	(while (> count 0)
	  (with-current-buffer rmail-buffer
	    (let (cur beg end)
	      (setq beg (rmail-msgbeg rmail-current-message)
		    end (rmail-msgend rmail-current-message))
	      ;; All access to the buffer's local variables is now finished...
	      (save-excursion
		;; ... so it is ok to go to a different buffer.
		(if (rmail-buffers-swapped-p) (set-buffer rmail-view-buffer))
		(setq cur (current-buffer))
		(save-restriction
		  (widen)
		  (with-current-buffer tembuf
		    (insert-buffer-substring cur beg end)
		    ;; Convert the text to one format or another and output.
		    (if babyl-format
			(rmail-output-as-babyl file-name (if noattribute 'nomsg))
448
		      (rmail-output-as-mbox file-name
449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468
					    (if noattribute 'nomsg))))))))

	  ;; Mark message as "filed".
	  (unless noattribute
	    (rmail-set-attribute rmail-filed-attr-index t))

	  (setq count (1- count))

	  (or from-gnus
	      (let ((next-message-p
		     (if rmail-delete-after-output
			 (rmail-delete-forward)
		       (if (> count 0)
			   (rmail-next-undeleted-message 1))))
		    (num-appended (- orig-count count)))
		(if (and (> count 0) (not next-message-p))
		    (error "Only %d message%s appended" num-appended
			   (if (= num-appended 1) "" "s"))))))
      (kill-buffer tembuf))))

469
;; FIXME gnus does not use this function.
470
(defun rmail-output-as-seen (file-name &optional count noattribute from-gnus)
471
  "Append this message to mbox file named FILE-NAME.
472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528
A prefix argument COUNT says to output that many consecutive messages,
starting with the current one.  Deleted messages are skipped and don't count.
When called from Lisp code, COUNT may be omitted and defaults to 1.

This outputs the message header as you see it.

The default file name comes from `rmail-default-file',
which is updated to the name you use in this command.

The optional third argument NOATTRIBUTE, if non-nil, says not
to set the `filed' attribute, and not to display a message.

The optional fourth argument FROM-GNUS is set when called from GNUS."
  (interactive
   (list (rmail-output-read-file-name)
	 (prefix-numeric-value current-prefix-arg)))
  (or count (setq count 1))
  (setq file-name
	(expand-file-name file-name
			  (and rmail-default-file
			       (file-name-directory rmail-default-file))))
  (set-buffer rmail-buffer)

  ;; Warn about creating new file.
  (or (find-buffer-visiting file-name)
      (file-exists-p file-name)
      (yes-or-no-p
       (concat "\"" file-name "\" does not exist, create it? "))
      (error "Output file does not exist"))

    (if (and (file-readable-p file-name) (mail-file-babyl-p file-name))
	(error "Cannot output `as seen' to a Babyl file"))

  (let ((orig-count count)
	(case-fold-search t)
	(tembuf (get-buffer-create " rmail-output")))

    (unwind-protect
	(while (> count 0)
	  (let (cur beg end)
	    ;; If operating from whole-mbox buffer, get message bounds.
	    (if (not (rmail-buffers-swapped-p))
		(setq beg (rmail-msgbeg rmail-current-message)
		      end (rmail-msgend rmail-current-message)))
	    ;; All access to the buffer's local variables is now finished...
	    (save-excursion
	      (setq cur (current-buffer))
	      (save-restriction
		(widen)
		;; If operating from the view buffer, get the bounds.
		(unless beg
		  (setq beg (point-min)
			end (point-max)))

		(with-current-buffer tembuf
		  (insert-buffer-substring cur beg end)
		  ;; Convert the text to one format or another and output.
529
		  (rmail-output-as-mbox file-name
530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559
					(if noattribute 'nomsg)
					t)))))

	  ;; Mark message as "filed".
	  (unless noattribute
	    (rmail-set-attribute rmail-filed-attr-index t))

	  (setq count (1- count))

	  (or from-gnus
	      (let ((next-message-p
		     (if rmail-delete-after-output
			 (rmail-delete-forward)
		       (if (> count 0)
			   (rmail-next-undeleted-message 1))))
		    (num-appended (- orig-count count)))
		(if (and (> count 0) (not next-message-p))
		    (error "Only %d message%s appended" num-appended
			   (if (= num-appended 1) "" "s"))))))
      (kill-buffer tembuf))))


;;;###autoload
(defun rmail-output-body-to-file (file-name)
  "Write this message body to the file FILE-NAME.
FILE-NAME defaults, interactively, from the Subject field of the message."
  (interactive
   (let ((default-file
	   (or (mail-fetch-field "Subject")
	       rmail-default-body-file)))
560 561 562 563
     (setq default-file
	   (replace-regexp-in-string ":" "-" default-file))
     (setq default-file
	   (replace-regexp-in-string " " "-" default-file))
564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585
     (list (setq rmail-default-body-file
		 (read-file-name
		  "Output message body to file: "
		  (and default-file (file-name-directory default-file))
		  default-file
		  nil default-file)))))
  (setq file-name
	(expand-file-name file-name
			  (and rmail-default-body-file
			       (file-name-directory rmail-default-body-file))))
  (save-excursion
    (goto-char (point-min))
    (search-forward "\n\n")
    (and (file-exists-p file-name)
	 (not (y-or-n-p (format "File %s exists; overwrite? " file-name)))
	 (error "Operation aborted"))
    (write-region (point) (point-max) file-name))
  (if rmail-delete-after-output
      (rmail-delete-forward)))

;; arch-tag: 4059abf0-f249-4be4-8e0d-602d370d01d1
;;; rmailout.el ends here