-;;; fill-flowed.el --- interprete RFC2646 "flowed" text
-;; Copyright (C) 2000 Free Software Foundation, Inc.
-
-;; Author: Simon Josefsson <jas@pdc.kth.se>
-;; Keywords: mail
-
-;; This program is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2 of the License, or
-;; (at your option) any later version.
-;;
-;; This program 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 this program; if not, write to the Free Software
-;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
-;;; Commentary:
-
-;; This implement decoding of RFC2646 formatted text, including the
-;; quoted-depth wins rules.
-
-;; Theory of operation: search for lines ending with SPC, save quote
-;; length of line, remove SPC and concatenate line with the following
-;; line if quote length of following line matches current line.
-
-;; When no further concatenations are possible, we've found a
-;; paragraph and we let `fill-region' fill the long line into several
-;; lines with the quote prefix as `fill-prefix'.
-
-;; Todo: encoding
-
-;; History:
-
-;; 2000-02-17 posted on ding mailing list
-;; 2000-02-19 use `point-at-{b,e}ol' in XEmacs
-;; 2000-03-11 no compile warnings for point-at-bol stuff
-;; 2000-03-26 commited to gnus cvs
-
-;;; Code:
-
-(eval-and-compile
- (fset 'fill-flowed-point-at-bol
- (if (fboundp 'point-at-bol)
- 'point-at-bol
- 'line-beginning-position))
-
- (fset 'fill-flowed-point-at-eol
- (if (fboundp 'point-at-eol)
- 'point-at-eol
- 'line-end-position)))
-
-(defun fill-flowed (&optional buffer)
- (save-excursion
- (set-buffer (or (current-buffer) buffer))
- (goto-char (point-min))
- (while (re-search-forward " $" nil t)
- (when (save-excursion
- (beginning-of-line)
- (looking-at "^\\(>*\\)\\( ?\\)"))
- (let ((quote (match-string 1)))
- (if (string= quote "")
- (setq quote nil))
- (when (and quote (string= (match-string 2) ""))
- (save-excursion
- ;; insert SP after quote for pleasant reading of quoted lines
- (beginning-of-line)
- (when (> (skip-chars-forward ">") 0)
- (insert " "))))
- (while (and (save-excursion
- (backward-char 3)
- (looking-at "[^-][^-] "))
- (save-excursion
- (unless (eobp)
- (forward-char 1)
- (if quote
- (looking-at (format "^\\(%s\\)\\([^>]\\)" quote))
- (looking-at "^ ?")))))
- (save-excursion
- (replace-match (if (string= (match-string 2) " ")
- "" "\\2")))
- (backward-delete-char -1)
- (end-of-line))
- (let ((fill-prefix (when quote (concat quote " "))))
- (fill-region (fill-flowed-point-at-bol)
- (fill-flowed-point-at-eol)
- 'left 'nosqueeze)))))))
-
-(provide 'fill-flowed)
-
-;;; fill-flowed.el ends here