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Re: adaptive-fill bug?
- From: Stefan Monnier <monnier@xxxxxxxxxxxxxxxx>
- Date: Thu, 09 Jun 2005 14:07:35 -0400
- X-ml-name: emacs-w3m
- X-mail-count: 08172
- References: <email@example.com>
> While I'm not sure of it since I don't use the adaptive-fill-mode
> normally, I found something like a bug. Try the following:
> (insert-char ?- 70)
> (let ((fill-column 70)
> (adaptive-fill-mode t))
> (fill-region (point-min) (point-max))))
> => "fill-prefix too long for specified width"
> Is it reasonable that the form causes an error? Similar errors
> have occurred when decoding the text/enriched MIME messages which
> contain long dash lines. The enriched-decode function which runs
> fill-region is performed then.
Does the patch below fix your problem?
> Though we can solve it for that case by binding adaptive-fill-mode
> to nil, I'm hesitating to do so. I appreciate any comment.
I agree. Binding adaptive-fill-mode to nil is nothing more than
--- fill.el 24 mai 2005 15:01:00 -0400 1.176
+++ fill.el 09 jun 2005 14:04:51 -0400
@@ -1,7 +1,7 @@
;;; fill.el --- fill commands for Emacs -*- coding: iso-2022-7bit -*-
-;; Copyright (C) 1985,86,92,94,95,96,97,1999,2001,02,03,2004
-;; Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1986, 1992, 1994, 1995, 1996, 1997, 1999, 2001, 2002,
+;; 2003, 2004, 2005 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: wp
@@ -205,6 +205,22 @@
(unless (zerop cmp)
(substring s1 0 cmp)))))
+(defun fill-match-adaptive-prefix ()
+ (let ((str (cond
+ ;; We don't need to consider `paragraph-start' here since it
+ ;; will be explicitly checked later on. Also setting
+ ;; first-line-prefix to nil prevents second-line-prefix from
+ ;; being used.
+ ;; ((looking-at paragraph-start) nil)
+ ((and adaptive-fill-regexp (looking-at adaptive-fill-regexp))
+ (match-string-no-properties 0))
+ (funcall adaptive-fill-function)))))
+ (if (>= (+ (current-left-margin) (length str)) (current-fill-column))
+ ;; Death to insanely long prefixes.
(defun fill-context-prefix (from to &optional first-line-regexp)
"Compute a fill prefix from the text between FROM and TO.
This uses the variables `adaptive-fill-regexp' and `adaptive-fill-function'
@@ -224,27 +240,13 @@
(setq start (point))
- (setq first-line-prefix
- ;; We don't need to consider `paragraph-start' here since it
- ;; will be explicitly checked later on.
- ;; Also setting first-line-prefix to nil prevents
- ;; second-line-prefix from being used.
- (cond ;; ((looking-at paragraph-start) nil)
- ((and adaptive-fill-regexp (looking-at adaptive-fill-regexp))
- (match-string-no-properties 0))
- (adaptive-fill-function (funcall adaptive-fill-function))))
+ (setq first-line-prefix (fill-match-adaptive-prefix))
(if (< (point) to)
(setq start (point))
- (setq second-line-prefix
- (cond ((looking-at paragraph-start) nil) ;Can it happen ? -stef
- ((and adaptive-fill-regexp
- (looking-at adaptive-fill-regexp))
- (buffer-substring-no-properties start (match-end 0)))
- (funcall adaptive-fill-function))))
+ (setq second-line-prefix (fill-match-adaptive-prefix))
;; If we get a fill prefix from the second line,
;; make sure it or something compatible is on the first line too.