Commit 406a57c1 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

*** empty log message ***

parent 9cfd2eeb
......@@ -133,23 +133,56 @@ From program, pass args FROM, TO and JUSTIFY-FLAG."
(insert " ")
(goto-char (point-min))
(let ((prefixcol 0))
;; This is the actual filling loop.
(let ((prefixcol 0) linebeg)
(while (not (eobp))
(setq linebeg (point))
(move-to-column (1+ fill-column))
(if (eobp)
(skip-chars-backward "^ \n")
;; Move back to start of word.
(skip-chars-backward "^ \n" linebeg)
;; Don't break after a period followed by just one space.
;; Move back to the previous place to break.
;; The reason is that if a period ends up at the end of a line,
;; further fills will assume it ends a sentence.
;; If we now know it does not end a sentence,
;; avoid putting it at the end of the line.
(while (and (> (point) (+ linebeg 2))
(eq (preceding-char) ?\ )
(eq (char-after (- (point) 2)) ?\.))
(forward-char -2)
(skip-chars-backward "^ \n" linebeg))
(if (if (zerop prefixcol) (bolp) (>= prefixcol (current-column)))
(skip-chars-forward "^ \n")
;; Keep at least one word even if fill prefix exceeds margin.
;; This handles all but the first line of the paragraph.
(skip-chars-forward " ")
(skip-chars-forward "^ \n"))
;; Normally, move back over the single space between the words.
(forward-char -1)))
;; Inserting the newline first prevents losing track of point.
(if (and fill-prefix (zerop prefixcol)
(< (- (point) (point-min)) (length fill-prefix))
(string= (buffer-substring (point-min) (point))
(substring fill-prefix 0 (- (point) (point-min)))))
;; Keep at least one word even if fill prefix exceeds margin.
;; This handles the first line of the paragraph.
(skip-chars-forward " ")
(skip-chars-forward "^ \n")))
;; Replace all whitespace here with one newline.
;; Insert before deleting, so we don't forget which side of
;; the whitespace point or markers used to be on.
(skip-chars-backward " ")
(insert ?\n)
;; Insert the fill prefix at start of each line.
;; Set prefixcol so whitespace in the prefix won't get lost.
(and (not (eobp)) fill-prefix (not (equal fill-prefix ""))
(insert fill-prefix)
(setq prefixcol (current-column))))
;; Justify the line just ended, if desired.
(and justify-flag (not (eobp))
(forward-line -1)
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