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bug#1174: 23.0.60; Some UTF-8 mails displaying wrongly in Emacs 23
From: |
Stefan Monnier |
Subject: |
bug#1174: 23.0.60; Some UTF-8 mails displaying wrongly in Emacs 23 |
Date: |
Mon, 01 Dec 2008 16:04:01 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux) |
> Simon, could you please clarify why you reverted Stefan's change in
> `nnimap-demule'? It breaks reading UTF-8 articles via nnimap.el in
> Emacs 23.
Having looked at the code again, I'm more than ever confident that
string-to-unibyte is the right thing to use. Maybe the code I installed
back then failed to fallback to string-as-unibyte when string-to-unibyte
was not available, which caused a bug for Simon?
In any case the newly committed code has a prenthesis typo that makes
it still use the old code and ignore the new config var
nnimap-demule-use-string-to-multibyte.
Also I recommend to just use the patch below instead. The first hunk
removes an unnecessary use of nnimap-demule since the output will be
inserted into a unibyte buffer.
Stefan
--- nnimap.el.~1.50.~ 2008-12-01 15:38:55.000000000 -0500
+++ nnimap.el 2008-12-01 15:49:53.000000000 -0500
@@ -608,12 +608,11 @@
(with-current-buffer nnimap-server-buffer
(setq uid imap-current-message
mbx imap-current-mailbox
- headers (nnimap-demule
- (if (imap-capability 'IMAP4rev1)
+ headers (if (imap-capability 'IMAP4rev1)
;; xxx don't just use car? alist doesn't contain
;; anything else now, but it might...
(nth 2 (car (imap-message-get uid 'BODYDETAIL)))
- (imap-message-get uid 'RFC822.HEADER)))
+ (imap-message-get uid 'RFC822.HEADER))
lines (imap-body-lines (imap-message-body imap-current-message))
chars (imap-message-get imap-current-message 'RFC822.SIZE)))
(nnheader-insert-nov
@@ -901,40 +900,17 @@
(when (nnimap-possibly-change-server server)
(nnoo-status-message 'nnimap server)))
-(defvar nnimap-demule-use-string-to-multibyte (fboundp 'string-to-multibyte)
- "Temporary internal debug variable.
-If you have problems (UTF-8 not decoded correctly on IMAP) with
-the default value, please report it as a bug!")
-;; FIXME: Clarify if we need to make this variable conditional on the Emacs
-;; version (Emacs 22 vs. Emacs 23;Emacs 21 doesn't have `string-to-multibyte'
-;; anyhow). --rsteib
-;;
-;; http://thread.gmane.org/gmane.emacs.gnus.general/67112
-;; (bug#464, reported by James Cloos)
-;; http://thread.gmane.org/gmane.emacs.bugs/21524
-;; (bug#1174, reported by Frank Schmitt)
-
-(defun nnimap-demule (string)
- ;; BEWARE: we used to use string-as-multibyte here which is braindead
- ;; because it will turn accidental emacs-mule-valid byte sequences
- ;; into multibyte chars. --Stef
- ;; Reverted, braindead got 7.5 out of 10 on imdb, so it can't be
- ;; that bad. --Simon
- (gnus-message 9 "nnimap-demule-use-string-to-multibyte: %s"
- nnimap-demule-use-string-to-multibyte)
- (if nnimap-demule-use-string-to-multibyte
- ;; Stefan
- (funcall (if (and (fboundp 'string-to-multibyte)
- (subrp (symbol-function 'string-to-multibyte)))
- 'string-to-multibyte
- 'identity)
- (or string "")))
- ;; Simon
- (funcall (if (and (fboundp 'string-as-multibyte)
- (subrp (symbol-function 'string-as-multibyte)))
- 'string-as-multibyte
- 'identity)
- (or string "")))
+;; We used to use a string-as-multibyte here, but it is really incorrect.
+;; This function is used when we're about to insert a unibyte string
+;; into a potentially multibyte buffer. The string is either an article
+;; header or body (or both?), undecoded. When Emacs is asked to convert
+;; a unibyte string to multibyte, it may either use the equivalent of
+;; nothing (e.g. non-Mule XEmacs), string-make-unibyte (i.e. decode using
+;; locale), string-as-multibyte (decode using emacs-internal coding system)
+;; or string-to-multibyte (keep the data undecoded as a sequence of bytes).
+;; Only the last one preserves the data such that we can reliably later on
+;; decode the text using the mime info.
+(defalias 'nnimap-demule 'mm-string-to-multibyte)
(defun nnimap-make-callback (article gnus-callback buffer)
"Return a callback function."
- bug#1174: 23.0.60; Some UTF-8 mails displaying wrongly in Emacs 23,
Stefan Monnier <=