Persian joining and Pango.

[Aidan Kehoe <kehoea parhasard net>]

Hello there,

I’m one of the XEmacs developers. Our GTK version, available here:
http://anonscm.debian.org/hg/xemacs/xemacs-gtk/ , uses Pango. Joining for
Arabic-specific characters works fine, but joining for Persian-specific
characters doesn’t. So when I type:

الف به په ته ثه 

alef, beh, teh and theh appear with no problems (well, the bidi is iffy, but
one step at a time), while peh doesn’t join to heh. On the same
machine, pango-view with the same text joins with no problems.

I’ve tried setting the GTK language to Persian; this doesn’t work because
the system locale doesn’t support it, but as far as I can see it shouldn’t
be necessary anyway. It’s not immediately obvious to me where to look next;
any pointers would be welcome.

Some version info:

$ pango-view --version
pango-view (pango) 1.28.4
Pango module interface version: 1.6.0
$ pkg-config --modversion pango   
1.28.4
$ pkg-config --modversion gtk+-2.0
2.22.1
$ pkg-config --modversion fontconfig
2.8.0
$ pkg-config --modversion freetype2 
12.2.6
$ 

Best,

Aidan

-- 
‘Iodine deficiency was endemic in parts of the UK until, through what has been
described as “an unplanned and accidental public health triumph”, iodine was
added to cattle feed to improve milk production in the 1930s.’
(EN Pearce, Lancet, June 2011)