Package: emacs;
Reported by: Ilya Zakharevich <nospam-abuse <at> ilyaz.org>
Date: Tue, 3 Mar 2015 22:32:01 UTC
Severity: normal
Found in version 25.0.50
View this message in rfc822 format
From: Ilya Zakharevich <nospam-abuse <at> ilyaz.org> To: 19993 <at> debbugs.gnu.org Subject: bug#19993: 25.0.50; Unicode fonts defective on Windows Date: Tue, 3 Mar 2015 14:02:28 -0800
(A) On Windows, most Unicode characters won’t be shown, even if the system
has (many) fonts covering the characters (and these fonts are listed in
`font-log'!).
(B) Documentation of fontsets is completely unusable (I will file a separate
bug report covering this), so there is no way a user would be able to
work around this by using “just Emacs docs”.
(However, there some googlable advice — but I did not check the
validity of it yet)
(C) Even if a character is (eventually) shown, it may take several seconds
after the character is typed. E.g., typing
ℱ
gives a 2sec delay on my system (a pretty quick PC). It is shown using
uniscribe:-outline-MS Gothic-normal-normal-normal-mono-13-*-*-*-c-*-jisx0208*-* (#x3D3)
(D) After typing as in (C), many operations become unusable. (E.g., showing
documentation for font-log takes several minutes to display the end of
the buffer. Save the buffer to a file — and it takes 4.5MB.)
(E) Doing `describe-fontset' show a complete mess. It looks like the system
is designed for some very old installations — it has an enormous overhead
(while not being able to show anything nontrivial!). I get 4500 rows
of output, containing junk like this:
…
¢ .. £ (#xA2 .. #xA3)
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-1
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-2
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-3
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-4
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-9
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-10
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-13
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-14
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-15
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-16
-*-*-*-*-*-*-*-*-*-*-*-*-viscii1.1-1
-*-*-*-*-*-*-*-*-*-*-*-*-iso10646-1
-*-*-*-*-*-*-*-*-*-*-*-*-jisx0208.1983-0
¤ (#xA4)
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-1
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-2
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-3
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-4
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-9
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-10
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-13
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-14
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-15
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-16
-*-*-*-*-*-*-*-*-*-*-*-*-viscii1.1-1
-*-*-*-*-*-*-*-*-*-*-*-*-iso10646-1
-*-*-*-*-*-*-*-*-*-*-*-*-gb2312.1980-0
-*-*-*-*-*-*-*-*-*-*-*-*-ksc5601.1987-0
¥ .. ¦ (#xA5 .. #xA6)
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-1
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-2
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-3
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-4
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-9
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-10
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-13
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-14
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-15
-*-*-*-*-*-*-*-*-*-*-*-*-iso8859-16
-*-*-*-*-*-*-*-*-*-*-*-*-viscii1.1-1
-*-*-*-*-*-*-*-*-*-*-*-*-iso10646-1
§ (#xA7)
…
having no relationship to how contemporary systems are set up.
(F) `font-show-log' is a little bit more convenient to work with
— but it shows no indication what goes wrong when Unicode
characters are not shown. It has 1600 lines — and, AFAICS,
is not documented.
-----
What to do with this mess? There should be 3 goals:
1) fonts should work out of the box;
2) one should make the list of encodings to load (I mean those in
`describe-fontset') system-dependent, and — on contemporary
systems — default to iso10646 *ONLY*.
3) Improve the docs (but I would try to address this in a separate
bug report).
(I keep all the debugging info I could find. It is huge, I will make
it available upon request.)
Thanks for the parts of Emacs which ARE working great,
Ilya
=======================================================
In GNU Emacs 25.0.50.20 (i686-pc-mingw32)
of 2015-02-08 on BUCEFAL
Repository revision: d5e3922e08587e7eb9e5aec2e9f84cbda405f857
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
`configure --prefix=/k/test'
Configured features:
SOUND NOTIFY ACL
Important settings:
value of $LANG: ENU
locale-coding-system: cp1252
Major mode: Fundamental
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
buffer-read-only: t
line-number-mode: t
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Load-path shadows:
None found.
Features:
(shadow sort gnus-util mail-extr emacsbug message dired format-spec
rfc822 mml easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse
rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045
ietf-drums mm-util help-fns mail-prsvr mail-utils time-date tooltip
eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
dos-w32 ls-lisp disp-table w32-win w32-vars tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
minibuffer cl-preloaded nadvice loaddefs button faces cus-face macroexp
files text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
w32notify w32 multi-tty emacs)
Memory information:
((conses 8 80324 9864)
(symbols 32 17968 0)
(miscs 32 85 128)
(strings 16 12688 4007)
(string-bytes 1 324435)
(vectors 8 9470)
(vector-slots 4 390690 6074)
(floats 8 65 62)
(intervals 28 243 45)
(buffers 516 13))
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Copyright (C) 1999 Darren O. Benham,
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1994-97 Ian Jackson.