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636 lines
23 KiB
EmacsLisp
636 lines
23 KiB
EmacsLisp
;;; rmailout.el --- "RMAIL" mail reader for Emacs: output message to a file
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;; Copyright (C) 1985, 1987, 1993-1994, 2001-2015 Free Software
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;; Foundation, Inc.
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: mail
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;; Package: rmail
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'rmail)
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(provide 'rmailout)
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(defcustom rmail-output-decode-coding nil
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"If non-nil, do coding system decoding when outputting message as Babyl."
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:type 'boolean
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:group 'rmail-output)
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(defcustom rmail-output-file-alist nil
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"Alist matching regexps to suggested output Rmail files.
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This is a list of elements of the form (REGEXP . NAME-EXP).
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The suggestion is taken if REGEXP matches anywhere in the message buffer.
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NAME-EXP may be a string constant giving the file name to use,
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or more generally it may be any kind of expression that returns
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a file name as a string."
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:type '(repeat (cons regexp
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(choice :value ""
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(string :tag "File Name")
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sexp)))
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:group 'rmail-output)
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;; This is risky because NAME-EXP gets evalled.
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;;;###autoload(put 'rmail-output-file-alist 'risky-local-variable t)
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(defcustom rmail-fields-not-to-output nil
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"Regexp describing fields to exclude when outputting a message to a file.
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The function `rmail-delete-unwanted-fields' uses this, ignoring case."
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:type '(choice (const :tag "None" nil)
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regexp)
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:group 'rmail-output)
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(defun rmail-output-read-file-name ()
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"Read the file name to use for `rmail-output'.
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Set `rmail-default-file' to this name as well as returning it.
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This uses `rmail-output-file-alist'."
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(let* ((default-file
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(or
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(when rmail-output-file-alist
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(or rmail-buffer (error "There is no Rmail buffer"))
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(save-current-buffer
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(set-buffer rmail-buffer)
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(let ((beg (rmail-msgbeg rmail-current-message))
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(end (rmail-msgend rmail-current-message)))
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(if (rmail-buffers-swapped-p) (set-buffer rmail-view-buffer))
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(save-excursion
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(save-restriction
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(widen)
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(narrow-to-region beg end)
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(let ((tail rmail-output-file-alist)
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answer err)
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;; Suggest a file based on a pattern match.
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(while (and tail (not answer))
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(goto-char (point-min))
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(if (re-search-forward (caar tail) nil t)
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(setq answer
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(condition-case err
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(eval (cdar tail))
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(error
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(display-warning
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:error
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(format "Error evaluating \
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`rmail-output-file-alist' element:\nregexp: %s\naction: %s\nerror: %S\n"
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(caar tail) (cdar tail) err))
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nil))))
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(setq tail (cdr tail)))
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answer))))))
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;; If no suggestion, use same file as last time.
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rmail-default-file))
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(read-file
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(expand-file-name
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(read-file-name
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(concat "Output message to mail file (default "
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(file-name-nondirectory default-file)
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"): ")
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(file-name-directory default-file)
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(abbreviate-file-name default-file))
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(file-name-directory default-file))))
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(setq rmail-default-file
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(if (file-directory-p read-file)
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(expand-file-name (file-name-nondirectory default-file)
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read-file)
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(expand-file-name
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(or read-file (file-name-nondirectory default-file))
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(file-name-directory default-file))))))
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(defun rmail-delete-unwanted-fields (preserve)
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"Delete all headers matching `rmail-fields-not-to-output'.
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Retains headers matching the regexp PRESERVE. Ignores case.
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The buffer should be narrowed to just the header."
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(if rmail-fields-not-to-output
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(save-excursion
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(goto-char (point-min))
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(let ((case-fold-search t))
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(while (re-search-forward rmail-fields-not-to-output nil t)
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(beginning-of-line)
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(unless (looking-at preserve)
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(delete-region (point) (line-beginning-position 2))))))))
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(defun rmail-output-as-babyl (file-name nomsg)
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"Convert the current buffer's text to Babyl and output to FILE-NAME.
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Alters the current buffer's text, so it should be a temporary buffer.
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If a buffer is visiting FILE-NAME, adds the text to that buffer
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rather than saving the file directly. If the buffer is an Rmail buffer,
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updates it accordingly. If no buffer is visiting FILE-NAME, appends
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the text directly to FILE-NAME, and displays a \"Wrote file\" message
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unless NOMSG is a symbol (neither nil nor t)."
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(let ((coding-system-for-write 'emacs-mule-unix))
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(save-restriction
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(goto-char (point-min))
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(search-forward "\n\n" nil 'move)
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(narrow-to-region (point-min) (point))
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(if rmail-fields-not-to-output
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(rmail-delete-unwanted-fields nil)))
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;; Convert to Babyl format.
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(rmail-convert-to-babyl-format)
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;; Write it into the file, or its buffer.
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(let ((buf (find-buffer-visiting file-name))
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(tembuf (current-buffer)))
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(if (null buf)
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(write-region (point-min) (point-max) file-name t nomsg)
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(if (eq buf (current-buffer))
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(error "Can't output message to same file it's already in"))
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;; File has been visited, in buffer BUF.
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(set-buffer buf)
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(let ((inhibit-read-only t)
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(msg (bound-and-true-p rmail-current-message)))
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;; If MSG is non-nil, buffer is in RMAIL mode.
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(if msg
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(rmail-output-to-babyl-buffer tembuf msg)
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;; Output file not in rmail mode => just insert at the end.
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(narrow-to-region (point-min) (1+ (buffer-size)))
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(goto-char (point-max))
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(insert-buffer-substring tembuf)))))))
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;; Called only if rmail-summary-exists, which means rmailsum is loaded.
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(declare-function rmail-update-summary "rmailsum" (&rest ignore))
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(defun rmail-output-to-babyl-buffer (tembuf msg)
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"Copy message in TEMBUF into the current Babyl Rmail buffer.
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Do what is necessary to make Rmail know about the new message, then
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display message number MSG."
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;; Turn on Auto Save mode, if it's off in this buffer but enabled by default.
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(and (not buffer-auto-save-file-name)
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auto-save-default
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(auto-save-mode t))
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(rmail-maybe-set-message-counters)
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(widen)
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(narrow-to-region (point-max) (point-max))
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(insert-buffer-substring tembuf)
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(goto-char (point-min))
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(widen)
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(search-backward "\n\^_")
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(narrow-to-region (point) (point-max))
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(rmail-count-new-messages t)
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(if (rmail-summary-exists)
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(rmail-select-summary (rmail-update-summary)))
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(rmail-show-message-1 msg))
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(defun rmail-convert-to-babyl-format ()
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"Convert the mbox message in the current buffer to Babyl format."
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(let ((count 0) (start (point-min))
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(case-fold-search nil)
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(buffer-undo-list t))
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(goto-char (point-min))
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(save-restriction
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(unless (looking-at "^From ")
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(error "Invalid mbox message"))
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(insert "\^L\n0,,\n*** EOOH ***\n")
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(rmail-nuke-pinhead-header)
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;; Decode base64 or quoted printable contents, Rmail style.
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(let* ((header-end (save-excursion
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(and (re-search-forward "\n\n" nil t)
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(1- (point)))))
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(case-fold-search t)
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(quoted-printable-header-field-end
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(save-excursion
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(re-search-forward
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"^content-transfer-encoding:\\(\n?[\t ]\\)*quoted-printable\\(\n?[\t ]\\)*"
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header-end t)))
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(base64-header-field-end
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(and
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;; Don't decode non-text data.
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(save-excursion
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(re-search-forward
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"^content-type:\\(\n?[\t ]\\)\\(text\\|message\\)/"
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header-end t))
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(save-excursion
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(re-search-forward
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"^content-transfer-encoding:\\(\n?[\t ]\\)*base64\\(\n?[\t ]\\)*"
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header-end t)))))
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(goto-char (point-max))
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(if quoted-printable-header-field-end
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(save-excursion
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(unless (mail-unquote-printable-region
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header-end (point) nil t t)
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(message "Malformed MIME quoted-printable message"))
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;; Change "quoted-printable" to "8bit",
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;; to reflect the decoding we just did.
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(goto-char quoted-printable-header-field-end)
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(delete-region (point) (search-backward ":"))
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(insert ": 8bit")))
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(if base64-header-field-end
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(save-excursion
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(when (condition-case nil
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(progn
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(base64-decode-region
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(1+ header-end)
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(save-excursion
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;; Prevent base64-decode-region
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;; from removing newline characters.
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(skip-chars-backward "\n\t ")
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(point)))
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t)
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(error nil))
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;; Change "base64" to "8bit", to reflect the
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;; decoding we just did.
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(goto-char base64-header-field-end)
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(delete-region (point) (search-backward ":"))
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(insert ": 8bit")))))
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;; Transform anything within the message text
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;; that might appear to be the end of a Babyl-format message.
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(save-excursion
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(save-restriction
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(narrow-to-region start (point))
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(goto-char (point-min))
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(while (search-forward "\n\^_" nil t) ; single char
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(replace-match "\n^_")))) ; 2 chars: "^" and "_"
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;; This is for malformed messages that don't end in newline.
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;; There shouldn't be any, but some users say occasionally
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;; there are some.
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(or (bolp) (newline))
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(insert ?\^_)
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(setq last-coding-system-used nil)
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;; Decode coding system, following specs in the message header,
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;; and record what coding system was decoded.
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(if rmail-output-decode-coding
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(let ((mime-charset
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(if (save-excursion
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(goto-char start)
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(search-forward "\n\n" nil t)
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(let ((case-fold-search t))
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(re-search-backward
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rmail-mime-charset-pattern
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start t)))
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(intern (downcase (match-string 1))))))
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(rmail-decode-region start (point) mime-charset)))
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(save-excursion
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(goto-char start)
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(forward-line 3)
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(insert "X-Coding-System: "
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(symbol-name last-coding-system-used)
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"\n")))))
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(defun rmail-nuke-pinhead-header ()
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"Delete the \"From \" line in the current mbox message.
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The variable `rmail-unix-mail-delimiter' specifies the From line format.
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Replaces the From line with a \"Mail-from\" header. Adds \"Date\" and
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\"From\" headers if they are not already present."
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(save-excursion
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(save-restriction
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(let ((start (point))
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(end (progn
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(condition-case ()
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(search-forward "\n\n")
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(error
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(goto-char (point-max))
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(insert "\n\n")))
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(point)))
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has-from has-date)
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(narrow-to-region start end)
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(let ((case-fold-search t))
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(goto-char start)
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(setq has-from (search-forward "\nFrom:" nil t))
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(goto-char start)
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(setq has-date (and (search-forward "\nDate:" nil t) (point)))
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(goto-char start))
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(let ((case-fold-search nil))
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(if (re-search-forward (concat "^" rmail-unix-mail-delimiter) nil t)
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(replace-match
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(concat
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"Mail-from: \\&"
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;; Keep and reformat the date if we don't
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;; have a Date: field.
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(if has-date
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""
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(concat
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"Date: \\2, \\4 \\3 \\9 \\5 "
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;; The timezone could be matched by group 7 or group 10.
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;; If neither of them matched, assume EST, since only
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;; Easterners would be so sloppy.
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;; It's a shame the substitution can't use "\\10".
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(cond
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((/= (match-beginning 7) (match-end 7)) "\\7")
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((/= (match-beginning 10) (match-end 10))
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(buffer-substring (match-beginning 10)
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(match-end 10)))
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(t "EST"))
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"\n"))
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;; Keep and reformat the sender if we don't
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;; have a From: field.
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(if has-from
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""
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"From: \\1\n"))
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t)))))))
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(autoload 'mail-mbox-from "mail-utils")
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(defun rmail-output-as-mbox (file-name nomsg &optional as-seen)
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"Convert the current buffer's text to mbox and output to FILE-NAME.
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Alters the current buffer's text, so it should be a temporary buffer.
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If a buffer is visiting FILE-NAME, adds the text to that buffer
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rather than saving the file directly. If the buffer is an Rmail buffer,
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updates it accordingly. If no buffer is visiting FILE-NAME, appends
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the text directly to FILE-NAME, and displays a \"Wrote file\" message
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unless NOMSG is a symbol (neither nil nor t).
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AS-SEEN is non-nil if we are copying the message \"as seen\"."
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(let ((case-fold-search t)
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from date)
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(goto-char (point-min))
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;; Preserve the Mail-From and MIME-Version fields
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;; even if they have been pruned.
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(search-forward "\n\n" nil 'move)
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(narrow-to-region (point-min) (point))
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(rmail-delete-unwanted-fields
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(if rmail-enable-mime "Mail-From"
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"Mail-From\\|MIME-Version\\|Content-type"))
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(goto-char (point-min))
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(or (looking-at "From ")
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(insert (mail-mbox-from)))
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(widen)
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;; Make sure message ends with blank line.
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(goto-char (point-max))
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(rmail-ensure-blank-line)
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(goto-char (point-min))
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(let ((buf (find-buffer-visiting file-name))
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(tembuf (current-buffer)))
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(if (null buf)
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(let ((coding-system-for-write 'raw-text-unix))
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;; FIXME should ensure existing file ends with a blank line.
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(write-region (point-min) (point-max) file-name t nomsg))
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(if (eq buf (current-buffer))
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(error "Can't output message to same file it's already in"))
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;; File has been visited, in buffer BUF.
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(set-buffer buf)
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(let ((inhibit-read-only t)
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(msg (and (boundp 'rmail-current-message)
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rmail-current-message)))
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(and msg as-seen
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(error "Can't output \"as seen\" to a visited Rmail file"))
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(if msg
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(rmail-output-to-rmail-buffer tembuf msg)
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;; Output file not in Rmail mode => just insert at the end.
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(narrow-to-region (point-min) (1+ (buffer-size)))
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(goto-char (point-max))
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(insert-buffer-substring tembuf)))))))
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(defun rmail-output-to-rmail-buffer (tembuf msg)
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"Copy message in TEMBUF into the current Rmail buffer.
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Do what is necessary to make Rmail know about the new message. then
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display message number MSG."
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(save-excursion
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(rmail-swap-buffers-maybe)
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(rmail-modify-format)
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;; Turn on Auto Save mode, if it's off in this buffer but enabled
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;; by default.
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(and (not buffer-auto-save-file-name)
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auto-save-default
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(auto-save-mode t))
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(rmail-maybe-set-message-counters)
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;; Insert the new message after the last old message.
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(widen)
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(unless (zerop (buffer-size))
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;; Make sure the last old message ends with a blank line.
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(goto-char (point-max))
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(rmail-ensure-blank-line)
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;; Insert the new message at the end.
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(narrow-to-region (point-max) (point-max)))
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(insert-buffer-substring tembuf)
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(rmail-count-new-messages t)
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;; FIXME should re-use existing windows.
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(if (rmail-summary-exists)
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(rmail-select-summary (rmail-update-summary)))
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(rmail-show-message-1 msg)))
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;;; There are functions elsewhere in Emacs that use this function;
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;;; look at them before you change the calling method.
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;;;###autoload
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(defun rmail-output (file-name &optional count noattribute not-rmail)
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"Append this message to mail file FILE-NAME.
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Writes mbox format, unless FILE-NAME exists and is Babyl format, in which
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case it writes Babyl.
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Interactively, the default file name comes from `rmail-default-file',
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which is updated to the name you use in this command. In all uses, if
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FILE-NAME is not absolute, it is expanded with the directory part of
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`rmail-default-file'.
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If a buffer is visiting FILE-NAME, adds the text to that buffer
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rather than saving the file directly. If the buffer is an Rmail
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buffer, updates it accordingly.
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This command always outputs the complete message header, even if
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the header display is currently pruned.
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Optional prefix argument COUNT (default 1) says to output that
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many consecutive messages, starting with the current one (ignoring
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deleted messages). If `rmail-delete-after-output' is non-nil, deletes
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messages after output.
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The optional third argument NOATTRIBUTE, if non-nil, says not to
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set the `filed' attribute, and not to display a \"Wrote file\"
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message (if writing a file directly).
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Set the optional fourth argument NOT-RMAIL non-nil if you call this
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from a non-Rmail buffer. In this case, COUNT is ignored."
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(interactive
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(list (rmail-output-read-file-name)
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(prefix-numeric-value current-prefix-arg)))
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(or count (setq count 1))
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(setq file-name
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(expand-file-name file-name
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(and rmail-default-file
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(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"))
|
||
(if noattribute (setq noattribute 'nomsg))
|
||
(let ((babyl-format (and (file-readable-p file-name)
|
||
(mail-file-babyl-p file-name)))
|
||
(cur (current-buffer))
|
||
(buf (find-buffer-visiting file-name)))
|
||
|
||
;; If a babyl file is visited in a buffer, is it visited as babyl
|
||
;; or as mbox?
|
||
(and babyl-format buf
|
||
(with-current-buffer buf
|
||
(save-restriction
|
||
(widen)
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(setq babyl-format
|
||
(looking-at "BABYL OPTIONS:"))))))
|
||
|
||
(if not-rmail ; eg via message-fcc-handler-function
|
||
(with-temp-buffer
|
||
(insert-buffer-substring cur)
|
||
;; Output in the appropriate format.
|
||
(if babyl-format
|
||
(progn
|
||
(goto-char (point-min))
|
||
;; rmail-convert-to-babyl-format errors if no From line,
|
||
;; whereas rmail-output-as-mbox inserts one.
|
||
(or (looking-at "From ")
|
||
(insert (mail-mbox-from)))
|
||
(rmail-output-as-babyl file-name noattribute))
|
||
(rmail-output-as-mbox file-name noattribute)))
|
||
;; Called from an Rmail buffer.
|
||
(if rmail-buffer
|
||
(set-buffer rmail-buffer)
|
||
(error "There is no Rmail buffer"))
|
||
(if (zerop rmail-total-messages)
|
||
(error "No messages to output"))
|
||
(let ((orig-count count)
|
||
beg end)
|
||
(while (> count 0)
|
||
(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-temp-buffer
|
||
(insert-buffer-substring cur beg end)
|
||
(if babyl-format
|
||
(rmail-output-as-babyl file-name noattribute)
|
||
(rmail-output-as-mbox file-name noattribute)))))
|
||
(or noattribute ; mark message as "filed"
|
||
(rmail-set-attribute rmail-filed-attr-index t))
|
||
(setq count (1- count))
|
||
(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")))))))))
|
||
|
||
;; FIXME nothing outside uses this, so NOT-RMAIL could be dropped.
|
||
;; FIXME this duplicates code from rmail-output.
|
||
;;;###autoload
|
||
(defun rmail-output-as-seen (file-name &optional count noattribute not-rmail)
|
||
"Append this message to mbox file named FILE-NAME.
|
||
The details are as for `rmail-output', except that:
|
||
i) the header is output as currently seen
|
||
ii) this function cannot write to Babyl files
|
||
iii) an Rmail buffer cannot be visiting FILE-NAME
|
||
|
||
Note that if NOT-RMAIL is non-nil, there is no difference between this
|
||
function and `rmail-output'. This argument may be removed in future,
|
||
so you should call `rmail-output' directly in that case."
|
||
(interactive
|
||
(list (rmail-output-read-file-name)
|
||
(prefix-numeric-value current-prefix-arg)))
|
||
(if not-rmail
|
||
(rmail-output file-name count noattribute not-rmail)
|
||
(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"))
|
||
;; FIXME why not?
|
||
(if (and (file-readable-p file-name) (mail-file-babyl-p file-name))
|
||
(error "Cannot output `as seen' to a Babyl file"))
|
||
(if noattribute (setq noattribute 'nomsg))
|
||
(if rmail-buffer
|
||
(set-buffer rmail-buffer)
|
||
(error "There is no Rmail buffer"))
|
||
(if (zerop rmail-total-messages)
|
||
(error "No messages to output"))
|
||
(let ((orig-count count)
|
||
(cur (current-buffer)))
|
||
(while (> count 0)
|
||
(let (beg end)
|
||
;; If operating from whole-mbox buffer, get message bounds.
|
||
(or (rmail-buffers-swapped-p)
|
||
(setq beg (rmail-msgbeg rmail-current-message)
|
||
end (rmail-msgend rmail-current-message)))
|
||
(save-restriction
|
||
(widen)
|
||
;; If operating from the view buffer, get the bounds.
|
||
(or beg
|
||
(setq beg (point-min)
|
||
end (point-max)))
|
||
(with-temp-buffer
|
||
(insert-buffer-substring cur beg end)
|
||
(rmail-output-as-mbox file-name noattribute t))))
|
||
(or noattribute ; mark message as "filed"
|
||
(rmail-set-attribute rmail-filed-attr-index t))
|
||
(setq count (1- count))
|
||
(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"))))))))
|
||
|
||
|
||
;;;###autoload
|
||
(defun rmail-output-body-to-file (file-name)
|
||
"Write this message body to the file FILE-NAME.
|
||
Interactively, the default file name comes from either the message
|
||
\"Subject\" header, or from `rmail-default-body-file'. Updates the value
|
||
of `rmail-default-body-file' accordingly. In all uses, if FILE-NAME
|
||
is not absolute, it is expanded with the directory part of
|
||
`rmail-default-body-file'.
|
||
|
||
Note that this overwrites FILE-NAME (after confirmation), rather
|
||
than appending to it. Deletes the message after writing if
|
||
`rmail-delete-after-output' is non-nil."
|
||
(interactive
|
||
(let ((default-file
|
||
(or (mail-fetch-field "Subject")
|
||
rmail-default-body-file)))
|
||
(setq default-file
|
||
(replace-regexp-in-string ":" "-" default-file))
|
||
(setq default-file
|
||
(replace-regexp-in-string " " "-" default-file))
|
||
(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))))
|
||
(if (zerop rmail-current-message)
|
||
(error "No message to output"))
|
||
(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)))
|
||
|
||
;;; rmailout.el ends here
|