[XeTeX] bopomofo ruby characters

[Ján Zahornadský]

Hello everyone!

First, thanks for being such a great community!

Now I'm in a problem of attaching a bopomofo pronunciation hints into
Chinese characters. I've found Wang fonts, which have these as a part of
a glyph, but due to multiple readings of the characters it's necessary
to switch between these fonts, often not having idea which fonts carries
which reading.

The second approach I tried is to write a command to attach those
symbols to a character. As I'm pretty unskilled in (Xe)LaTeX, my code so
far looks like this (for 綽/ㄔㄨㄛˋ character):

\fontsize{36}{36}\ming\fbox{綽\kern 8pt\raise 28pt\hbox{%
\fontsize{12}{12}%
\fontspec[RawFeature={vertical:}]{Ming(for ISO10646)}%
\rotatebox{270}{\raise 1pt\hbox{\makebox[32pt]{\hfil ㄔㄨㄛ{\kern-16pt\
lower-7pt\hbox{ˋ}}\hfil}}}%
}\kern -4pt}

(basic idea is to typeset the character, then next to it at a one third
of the original size typeset the vertical box with the pronunciation
guide; moreover keep the tone at the expected position -- that is, over
and to the right of the last character). As for this approach, I don't 
have clear idea how to turn it into macro, say \anot{綽}{ㄔㄨㄛˋ} which 
would take care of presence of the tone, font size etc. (Is there a way?)

Was anyone solving a similar problem? Do you know some fonts besides 
Wang ones to contain ruby characters (Wang fonts don't contain all the
characters I need) or is there some package providing this functionality
I'm missing?

Little example of my tries attached, you'll need the Hong Kong "Ming(for 
ISO10646)" font plus Wang fonts available at:

http://apt.nc.hcc.edu.tw/pub/FreeSoftware/free_fonts/wangttf/

Thanks a lot for any suggestion,
Jan

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