From: "Clément Pit--Claudel" <clement.pitclaudel@live.com>
To: 20628@debbugs.gnu.org
Subject: bug#20628: 25.0.50; Incorrect line height for some fonts
Date: Thu, 21 May 2015 23:02:06 -0400 [thread overview]
Message-ID: <555E9C2E.8040008@live.com> (raw)
Hi,
Some Unicode characters incorrectly increase the height of the line on which
they are inserted, by an incorrect amount (typically 4/5 times the normal line
height). This is due to Emacs falling back to a font for which line height
calculations are incorrect. The problem can generally be reproduced just by
inputing the following characters:
(𝓝𝓟)
Alternatively, the problem can be reproduced by switching to certain
specific fonts. For example:
(set-frame-font "-unknown-Latin Modern Math-normal-normal-normal-*-*-*-*-*-*-0-iso10646-1" nil nil)
This problem is not specific to 25.0.50. It is discussed on stackexchange [1]
and the effect can be observed in [2]. It only occurs with specific fonts. It
particularly impacts packages that rely on prettify-symbols-mode to display math
symbols; when users install the package, some lines in the buffer start being 4
or 5 times taller than other lines, although no characters on the affected lines
stand out. For this reason, even if this is likely a problem in the way the
fonts are packaged, it would be nice to have a workaround at the Emacs level.
Emacs is the only program on my system that displays this behaviour; typing the
same text in gedit or switching gedit to one of the misbehaving fonts, for
example, does not affect the line height.
[1] http://emacs.stackexchange.com/questions/251/
[2] https://cloud.githubusercontent.com/assets/2506825/7760973/67ceaaea-ffd5-11e4-8bf6-d796aa162b0e.png
---
In GNU Emacs 25.0.50.4 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.8)
of 2015-05-14 on c-mint
Windowing system distributor `The X.Org Foundation', version 11.0.11501000
System Description: Linux Mint 17.1 Rebecca
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
Important settings:
value of $LC_TIME: en_DK.UTF-8
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Lisp Interaction
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
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: 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 mule-util time-date
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel x-win term/common-win x-dnd 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 cl-generic 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 dbusbind gfilenotify
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty make-network-process emacs)
Memory information:
((conses 16 76472 5652)
(symbols 48 18496 0)
(miscs 40 87 99)
(strings 32 11421 4141)
(string-bytes 1 314062)
(vectors 16 9839)
(vector-slots 8 396279 11643)
(floats 8 102 46)
(intervals 56 177 0)
(buffers 976 11)
(heap 1024 40850 1039))
next reply other threads:[~2015-05-22 3:02 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-22 3:02 Clément Pit--Claudel [this message]
2015-05-22 7:32 ` bug#20628: 25.0.50; Incorrect line height for some fonts Eli Zaretskii
2015-05-22 10:11 ` Oleh Krehel
2015-05-22 12:26 ` Eli Zaretskii
2015-05-22 12:49 ` Oleh Krehel
2015-05-22 13:13 ` Eli Zaretskii
2015-05-22 13:18 ` Eli Zaretskii
2015-05-22 13:03 ` Eli Zaretskii
2015-05-22 13:15 ` Oleh Krehel
2015-05-22 13:55 ` Eli Zaretskii
2015-05-22 13:54 ` Oleh Krehel
2015-05-22 14:07 ` Eli Zaretskii
2015-05-22 14:20 ` Oleh Krehel
2015-05-22 14:49 ` Eli Zaretskii
2015-05-22 15:03 ` Oleh Krehel
2015-05-22 15:39 ` Eli Zaretskii
2015-05-22 16:05 ` Oleh Krehel
2015-05-22 16:14 ` Eli Zaretskii
2015-05-22 16:15 ` Oleh Krehel
2015-05-22 16:32 ` Eli Zaretskii
2015-05-22 16:33 ` Oleh Krehel
2015-05-22 16:54 ` Oleh Krehel
2015-05-22 17:15 ` Andreas Schwab
2015-05-22 17:40 ` Oleh Krehel
2015-05-22 18:18 ` Eli Zaretskii
2015-05-22 18:18 ` Oleh Krehel
2015-05-22 18:43 ` Eli Zaretskii
2015-05-22 18:53 ` Oleh Krehel
2015-05-22 19:05 ` Clément Pit--Claudel
2015-05-22 19:27 ` Eli Zaretskii
2015-05-22 19:09 ` Clément Pit--Claudel
2015-05-22 19:37 ` Eli Zaretskii
2015-05-22 20:08 ` Oleh Krehel
2015-05-22 22:43 ` Stefan Monnier
2015-05-22 23:55 ` Clément Pit--Claudel
2015-05-23 7:24 ` Eli Zaretskii
2015-05-24 8:20 ` Clément Pit--Claudel
2015-05-24 9:36 ` Eli Zaretskii
2015-05-23 7:20 ` Eli Zaretskii
2015-05-23 13:27 ` Stefan Monnier
2015-05-23 13:54 ` Eli Zaretskii
2015-05-23 7:10 ` Eli Zaretskii
2015-05-23 7:47 ` YAMAMOTO Mitsuharu
2015-05-23 8:26 ` Eli Zaretskii
2015-05-23 9:56 ` Oleh Krehel
2015-05-23 10:21 ` Eli Zaretskii
2015-05-23 10:56 ` Oleh Krehel
2015-05-25 10:32 ` Rasmus
2015-05-25 13:24 ` Drew Adams
2015-05-25 14:39 ` Eli Zaretskii
2015-05-22 18:15 ` Eli Zaretskii
2015-05-22 18:57 ` Clément Pit--Claudel
2015-05-22 19:15 ` Eli Zaretskii
2015-05-22 21:49 ` Werner LEMBERG
2015-05-23 6:52 ` Eli Zaretskii
2015-05-23 9:50 ` Werner LEMBERG
2015-05-23 9:57 ` Werner LEMBERG
2015-05-23 10:31 ` Eli Zaretskii
2015-05-23 11:45 ` Werner LEMBERG
2015-05-24 8:20 ` Clément Pit--Claudel
2015-05-24 9:29 ` Eli Zaretskii
2015-05-24 9:32 ` Werner LEMBERG
2015-05-24 9:48 ` Eli Zaretskii
2015-05-24 10:06 ` Eli Zaretskii
2015-05-24 10:29 ` Eli Zaretskii
2015-05-27 15:20 ` Eli Zaretskii
2015-05-29 8:20 ` Eli Zaretskii
2015-05-29 8:35 ` Clément Pit--Claudel
2015-05-29 9:30 ` Oleh Krehel
2015-05-29 10:23 ` Eli Zaretskii
2015-05-29 10:38 ` Oleh Krehel
2015-05-29 14:49 ` Stefan Monnier
2015-05-29 14:49 ` Oleh Krehel
2015-05-29 18:17 ` Eli Zaretskii
2015-05-29 13:15 ` Eli Zaretskii
2015-05-29 13:16 ` Oleh Krehel
2015-05-29 18:18 ` Eli Zaretskii
2015-05-30 9:40 ` Eli Zaretskii
2015-05-30 5:21 ` Clément Pit--Claudel
2015-05-30 9:42 ` Eli Zaretskii
2015-05-30 13:00 ` Oleh Krehel
2015-05-30 14:20 ` Eli Zaretskii
2015-05-30 14:32 ` Oleh Krehel
2015-05-30 16:28 ` Eli Zaretskii
2015-05-30 16:59 ` Oleh Krehel
2015-05-30 18:35 ` Eli Zaretskii
2015-05-30 18:57 ` Oleh Krehel
2015-05-30 19:23 ` Eli Zaretskii
2015-05-30 19:26 ` Oleh Krehel
2015-05-30 19:52 ` Eli Zaretskii
2015-05-31 14:48 ` Eli Zaretskii
2015-06-01 10:54 ` Oleh Krehel
2015-06-01 14:49 ` Eli Zaretskii
2015-06-06 13:14 ` Eli Zaretskii
2015-05-30 18:58 ` Clément Pit--Claudel
2015-05-30 19:25 ` Eli Zaretskii
2015-06-03 9:44 ` Werner LEMBERG
2015-06-03 14:53 ` Eli Zaretskii
2015-05-22 19:03 ` Clément Pit--Claudel
2015-05-22 19:35 ` Eli Zaretskii
2015-05-22 20:25 ` Clément Pit--Claudel
2015-05-23 7:12 ` Eli Zaretskii
2015-05-24 8:20 ` Clément Pit--Claudel
2015-05-24 9:31 ` Eli Zaretskii
2015-05-23 8:19 ` Eli Zaretskii
2015-05-22 15:41 ` Andreas Schwab
2015-05-22 15:05 ` Eli Zaretskii
2015-05-22 15:27 ` Stefan Monnier
2015-05-22 15:42 ` Eli Zaretskii
2015-05-22 13:21 ` Andreas Schwab
2015-05-24 8:20 ` Clément Pit--Claudel
2015-05-24 9:32 ` Eli Zaretskii
2015-05-22 15:16 ` Rasmus
[not found] <<555E9C2E.8040008@live.com>
[not found] ` <<83wq004x2w.fsf@gnu.org>
[not found] ` <<83twv44vd3.fsf@gnu.org>
[not found] ` <<87egm87ny6.fsf@gmail.com>
[not found] ` <<83oalc4syu.fsf@gnu.org>
[not found] ` <<87617k7m5u.fsf@gmail.com>
[not found] ` <<83mw0w4seb.fsf@gnu.org>
[not found] ` <<87zj4w66ds.fsf@gmail.com>
[not found] ` <<83lhgg4qhf.fsf@gnu.org>
[not found] ` <<87iobk64e6.fsf@gmail.com>
[not found] ` <<83h9r44o63.fsf@gnu.org>
[not found] ` <<87pp5sy4vu.fsf@gmail.com>
[not found] ` <<83egm84mj3.fsf@gnu.org>
[not found] ` <<87617k6127.fsf@gmail.com>
[not found] ` <<83d21s4lpx.fsf@gnu.org>
[not found] ` <<87twv44lnc.fsf@gmail.com>
[not found] ` <<87egm84kp2.fsf@gmail.com>
[not found] ` <<83a8ww4grx.fsf@gnu.org>
[not found] ` <<87382oml31.fsf@gmail.com>
[not found] ` <<83k2vz3h2p.fsf@gnu.org>
[not found] ` <<wlpp5rivkj.wl%mituharu@math.s.chiba-u.ac.jp>
[not found] ` <<87oal954mc.fsf@gmx.us>
[not found] ` <<b054a996-dd2e-4436-80f2-93cc5b2d1cb9@default>
[not found] ` <<83oal8zpp8.fsf@gnu.org>
2015-05-25 15:39 ` Drew Adams
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