[Agda] Mac OS 10.6 Emacs 24.2 and unicode

[Andreas Abel]

This is an experience report, maybe useful for others struggling with 
unicode characters under emacs.

After installing Emacs for OS X Modified 24.2

   http://vgoulet.act.ulaval.ca/en/emacs/mac

some unicode characters were not displayed (e.g., \bn ℕ).  The problem 
was that emacs chose font AppleMyungjo to render it, unsuccessfully.

Installing unifont (see Agda wiki) did help, but only in conjunction 
with disabling the ApplyMyungjo font in Apple Font Book.  Unfortunately, 
unifont looks ugly.

I finally found good advice here:

   http://www.emacswiki.org/emacs-es/unicode-fonts.el

It recommends to install some fonts, e.g.

   SymbolA from http://users.teilar.gr/~g1951d/

(that already fixed the \bn problem),

   Deja Vu from 
http://sourceforge.net/projects/dejavu/files/dejavu/2.33/dejavu-fonts-ttf-2.33.tar.bz2

and

   http://www.quivira-font.com/files/Quivira.ttf

I did not go further to actually use the unicode-fonts.el package, since 
my problem was solved.  However, it seems to provide a way to influence 
the "somewhat random" font mapping algorithm of emacs.

NB: After installation of SymbolA it is possible to enable AppleMyungjo 
again without messing up the unicode rendering in Emacs.

Cheers,
Andreas

-- 
Andreas Abel  <><      Du bist der geliebte Mensch.

Theoretical Computer Science, University of Munich
Oettingenstr. 67, D-80538 Munich, GERMANY

andreas.abel at ifi.lmu.de
http://www2.tcs.ifi.lmu.de/~abel/