From: Peter Stephenson <pws@csr.com>
To: zsh-workers@sunsite.dk
Subject: Re: Unicode problem
Date: Mon, 21 Jan 2008 14:15:37 +0000 [thread overview]
Message-ID: <200801211415.m0LEFbbU017355@news01.csr.com> (raw)
In-Reply-To: <slrnfp97q5.dvv.joerg@alea.gnuu.de>
> The zero width character is drawn with width one?
Yes, that's what gnome-terminal is doing. It seems to agree with the
screen width the library code is reporting (I didn't check explicitly
but the behaviour is consistent with that).
I think there are actually two widths involved here: the screen width
used with a fixed-size font for editing (applicable to zsh), and the
logical width of the character that would appear in a document. The
latter is typically different to the former (in particular when a
variable width font is in use), and it's the latter case where it needs
to be zero width. There's a kind of hybrid case for a WYSIWYG word
processor where it needs to flag up the space for editing even though
pretending it's behaving as zero-width, but this is a special case of
variable-width fonts. The information in the library as returned by
wcwidth() is only applicable to fixed width fonts, where "zero width" is
essentially meaningless; a character width must be 1, 2, ... So I think
gnome-terminal is doing the right thing here, although I can understand
the confusion.
--
Peter Stephenson <pws@csr.com> Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK Tel: +44 (0)1223 692070
next prev parent reply other threads:[~2008-01-21 14:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-17 10:39 Jörg Sommer
2008-01-17 12:09 ` Peter Stephenson
2008-01-21 13:33 ` Jörg Sommer
2008-01-21 14:15 ` Peter Stephenson [this message]
2008-01-21 14:29 ` Mikael Magnusson
2008-01-21 14:45 ` Peter Stephenson
2008-01-21 18:16 ` Bart Schaefer
2008-01-22 9:57 ` Peter Stephenson
2008-01-22 0:12 ` Vincent Lefevre
2008-01-22 1:09 ` Mikael Magnusson
2008-01-22 1:25 ` Vincent Lefevre
2008-01-22 16:19 ` Clint Adams
2008-01-22 16:25 ` Mikael Magnusson
2008-01-22 1:49 ` Clint Adams
2008-01-22 2:07 ` Mikael Magnusson
2008-01-22 16:26 ` Clint Adams
2008-01-21 20:28 ` Jörg Sommer
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