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Re: Fraktur


From: James Cloos
Subject: Re: Fraktur
Date: Fri, 16 Jan 2009 19:38:59 -0500
User-agent: Gnus/5.110011 (No Gnus v0.11) Emacs/23.0.60 (gnu/linux)

>>>>> "Handa" == Kenichi Handa <address@hidden> writes:

Handa> The rule Emacs currently has for choosing a font for Unicode
Handa> Plane 1 is to find a font supporting a scpecifc script.  For
Handa> instance, U+1D400 belongs to `mathematical' script, so Emacs
Handa> searches fonts supporting that script. And, xft font-backend
Handa> uses `script-representative-chars' to do such searching.  Ad
Handa> the representative charcters of `mathematical' is U+1D400,
Handa> xft font-backend searches fonts that support U+1D400.

Because of how the font-wide hinting works, font families like DejaVu
have added the mathematical characters -- at least initially -- to
the specific faces which have similar glyphs.

Ie, the MATHEMATICAL ITALIC characters were added to the Serif-Italic,
MATHEMATICAL SANS-SERIF ITALIC to Sans-Oblique, etc.

As such, it would probably be a good idea for emacs to consider each
range of MATHEMATICAL characters as its own script, for the purpose
of choosing a default font.

The (sub-)families in the MATHEMATICAL block would be:

  MATHEMATICAL BOLD
  MATHEMATICAL ITALIC
  MATHEMATICAL BOLD ITALIC
  MATHEMATICAL SCRIPT
  MATHEMATICAL BOLD SCRIPT
  MATHEMATICAL FRAKTUR
  MATHEMATICAL DOUBLE-STRUCK
  MATHEMATICAL BOLD FRAKTUR
  MATHEMATICAL SANS-SERIF
  MATHEMATICAL SANS-SERIF BOLD
  MATHEMATICAL SANS-SERIF ITALIC
  MATHEMATICAL SANS-SERIF BOLD ITALIC
  MATHEMATICAL MONOSPACE

It /may/ also be necessary to diferentiate between latin and greek in
those ranges, but I suspect not.

-JimC
-- 
James Cloos <address@hidden>         OpenPGP: 1024D/ED7DAEA6




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