This commit was manufactured by cvs2svn to create branch 'grossjoh'.

[elisp/gnus.git-] / lisp / flow-fill.el

diff --git a/lisp/flow-fill.el b/lisp/flow-fill.el
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-;;; flow-fill.el --- interprete RFC2646 "flowed" text
-
-;; Copyright (C) 2000 Free Software Foundation, Inc.
-
-;; Author: Simon Josefsson <jas@pdc.kth.se>
-;; 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 2, or (at your option)
-;; any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING.  If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
-
-;;; Commentary:
-
-;; 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, implement basic `fill-region' (Emacs and XEmacs
-;;       implementations differ..)
-
-;;; 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
-;; 2000-10-23  don't flow "-- " lines, make "quote-depth wins" rule
-;;             work when first line is at level 0.
-
-;;; Code:
-
-(eval-when-compile (require 'cl))
-
-(eval-and-compile
-  (defalias 'fill-flowed-point-at-bol
-    (if (fboundp 'point-at-bol)
-       'point-at-bol
-      'line-beginning-position))
-
-  (defalias '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)) sig)
-         (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
-                       (ignore-errors (backward-char 3))
-                       (setq sig (looking-at "-- "))
-                       (looking-at "[^-][^-] "))
-                     (save-excursion
-                       (unless (eobp)
-                         (forward-char 1)
-                         (looking-at (format "^\\(%s\\)\\([^>]\\)"
-                                             (or quote " ?"))))))
-           (save-excursion
-             (replace-match (if (string= (match-string 2) " ")
-                                "" "\\2")))
-           (backward-delete-char -1)
-           (end-of-line))
-         (unless sig
-           (let ((fill-prefix (when quote (concat quote " "))))
-             (fill-region (fill-flowed-point-at-bol)
-                          (min (1+ (fill-flowed-point-at-eol)) (point-max))
-                          'left 'nosqueeze))))))))
-
-(provide 'flow-fill)
-
-;;; flow-fill.el ends here