Tony Mechelynck wrote:
On 17/07/14 21:55, Bram Moolenaar wrote:
Charles Campbell wrote:
The following line, when in a buffer that vim is displaying:
||||m=⎣ℜ(b-a)⎦=1~1026
has the "script R" displayed correctly when the cursor is swept over it
from right to left,
but the "script R" is displayed incorrectly when the cursor is swept
over it from left to right.
I'm using:
Scientific Linux 6.5 (Carbon)
vim 7.4.372
set guifont=Monospace\ Bold\ 12
configure --with-features=huge --enable-gui=gtk2 --enable-perlinterp
--enable-pythoninterp --enable-cscope
Looks like a problem with the font: the character is wider than the
display cell. Thus when drawing the character to the right of the
"script R" it erases the rightmost pixels of it.
Reminds me of a problem I've had in the past with a totally different
font, and without doublewidth.
Once upon a time I used Lucida (Lucida Console on Windows, Lucida
Typewriter on Linux: I still used both platforms then); then I noticed
that in bold Cyrillic I had the problem described: sweeping the cursor
over the text made it look wrong when swept in one direction, right
when swept in the opposite direction.
On closer look, the bold Cyrillic glyphs of the Lucida font were
apparently constructed by superimposing the unbold glyphs with a copy
of themselves shifted laterally by one pixel, and thus the bold glyphs
were one pixel wider than the normal-weight glyphs (and than the
declared glyph-width of the font), which gvim "didn't like".
So I found a different font (Bitstream Vera Sans Mono) which doesn't
have this problem, and can AFAICT display Latin and Cyrillic with or
without bold or italic (or, of course, underlined) with no problem.
Dr. Chip, maybe you can find a different font, which has the glyph but
not the problem? It may require some trial and error.
I've been through all the fonts that have "mono" in their names on my
system; each of them has the same problem that Luxi Mono has. Most of
the rest look like they use double-spacing: i e . t h e y r e s e m b l
e t h i s; although that does mean that the R shows up completely.
I'll probably just make do with having that R look like an F most of the
time.
Thanks!
Chip Campbell
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