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[Emacs-diffs] master c281b9a 1/3: Add comments to rfc2047
From: |
Lars Ingebrigtsen |
Subject: |
[Emacs-diffs] master c281b9a 1/3: Add comments to rfc2047 |
Date: |
Fri, 12 Jul 2019 09:59:48 -0400 (EDT) |
branch: master
commit c281b9a121a251b19e3e90b67ca85fbe834b3bc2
Author: Lars Ingebrigtsen <address@hidden>
Commit: Lars Ingebrigtsen <address@hidden>
Add comments to rfc2047
* lisp/mail/rfc2047.el (rfc2047-fold-region): Add comments to the
function.
---
lisp/mail/rfc2047.el | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/lisp/mail/rfc2047.el b/lisp/mail/rfc2047.el
index 118ca8a..5f2abc4 100644
--- a/lisp/mail/rfc2047.el
+++ b/lisp/mail/rfc2047.el
@@ -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))