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Add comments to rfc2047

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* lisp/mail/rfc2047.el (rfc2047-fold-region): Add comments to the
function.
This commit is contained in:
Lars Ingebrigtsen 2019-07-12 15:38:34 +02:00
parent 812715a471
commit c281b9a121
1 changed files with 13 additions and 0 deletions
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13
lisp/mail/rfc2047.el
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@ -741,6 +741,8 @@ Point moves to the end of the region."
(while (not (eobp))
(when (and (or break qword-break)
(> (- (point) bol) 76))
;; We have a line longer than 76 characters, so break the
;; line.
(goto-char (or break qword-break))
(setq break nil
qword-break nil)
@ -753,7 +755,10 @@ Point moves to the end of the region."
(skip-chars-forward " \t")
(unless (eobp)
(forward-char 1)))
;; See whether we're at a point where we can break the line
;; (if it turns out to be too long).
(cond
;; New line, so there's nothing to break.
((eq (char-after) ?\n)
(forward-char 1)
(setq bol (point)
@ -762,12 +767,17 @@ Point moves to the end of the region."
(skip-chars-forward " \t")
(unless (or (eobp) (eq (char-after) ?\n))
(forward-char 1)))
;; CR in CRLF; shouldn't really as this function shouldn't be
;; called after encoding for line transmission.
((eq (char-after) ?\r)
(forward-char 1))
;; Whitespace -- possible break point.
((memq (char-after) '(? ?\t))
(skip-chars-forward " \t")
(unless first ;; Don't break just after the header name.
(setq break (point))))
;; If the header has been encoded (with RFC2047 encoding,
;; which looks like "=?utf-8?Q?F=C3=B3?=".
((not break)
(if (not (looking-at "=\\?[^=]"))
(if (eq (char-after) ?=)
@ -777,9 +787,12 @@ Point moves to the end of the region."
(unless (= (point) b)
(setq qword-break (point)))
(skip-chars-forward "^ \t\n\r")))
;; Look for the next LWSP (i.e., whitespace character).
(t
(skip-chars-forward "^ \t\n\r")))
(setq first nil))
;; Finally, after the loop, we have a line longer than 76
;; characters, so break the line.
(when (and (or break qword-break)
(> (- (point) bol) 76))
(goto-char (or break qword-break))