On Mon, 2008-01-28 at 12:24 -0500, Ed Trager wrote:
> Hi, everyone,
>
> Behdad notes:
>
> > It could be easier if we could match on scripts instead of languages,
> > but that's another issue.
>
> ... and I agree completely :
>
> REQUIREMENT: EXPAND DEFINITION OF LOCALE TO INCLUDE OPTIONAL ISO-15924
> SCRIPT CODE
No need to shout Ed.
> =============================================================================
>
> First of all, the notion of "locale" needs to be re-defined as
> composed of *3* elements instead
> of *2* elements.
>
> Currently, locales are composed of just two elements:
>
> (1) A "language" code (ISO-639-1, -2 : "en", "ja", "zh", "th", etc.)
> and (2) A "region" code ("US", "CA", "FR", "TW", "HK", "SG", etc. )
>
> This concept is incomplete. A THIRD ELEMENT, SCRIPT, NEEDS TO BE ADDED. Using
> four-letter ISO-15924 (
> http://unicode.org/iso15924/iso15924-codes.html ) codes is the obvious
> answer:
>
> (3) "Script" code (ISO-15924 : "arab", "cyrl", "hans"
> (simplified Chinese), "hant" (traditional Chinese)
No, this is not what I meant. And this doesn't solve the issues I want
to solve.
[...]
> Adding a four-letter script code to Locale is the obvious remedy.
> Perhaps the Pango and Fontconfig communities could take the lead in
> creating the minor changes in infrastructure needed to support this
> addition ?
That's what I've been wanting to do, but not in the format you suggest.
> Let's return to Behdad's Japanese example for a minute. Recall that
> modern Japanese is, for all intents and purposes, really composed of
> four scripts ( Han, Katakana, Hiragana, Latin ). So, for a Japanese
> locale, perhaps I ought really be able to specify a different font set
> each and every one of those four scripts independently, if I so
> desire.
Yes, and with my proposed syntax of having a separate "script" element
you can do that. So you have a pattern of :lang="ja":script="han " for
example.
behdad
> Best Wishes -- Ed Trager
>
>
> On Jan 27, 2008 11:38 PM, Behdad Esfahbod <behdad@xxxxxxxxxx> wrote:
> > Hi,
> >
> > This keeps coming up again and again: CJK users want Pango to choose
> > Latin fonts differently under a CJK locale than it does under a
> non-CJK
> > locale.
> >
> > Making that work is currently impossible in Pango+fontconfig. The
> > reason being that Pango passes a Latin "lang" to fontconfig for
> Latin
> > runs, and fontconfig and font configurations have no way to
> > differentiate the Latin in CJK locale from Latin in Latin locale
> cases.
> >
> > I'd like to propose adding a new element named "locale" that holds
> the
> > original locale language. Fontconfig needs not know about this at
> all
> > except that filling it in in FcDefaultSubstitute() like it does for
> > "lang". Then users can write configuration that is sensitive to
> locale.
> >
> > Pango then can pass PangoContext language as "locale". PangoContext
> > language defaults to the locale, so this is all consistent.
> >
> > I can do this all in Pango only, but given that I want to encourage
> CJK
> > font developer/packagers to write such configuration for their
> fonts,
> > would be nice to have it upstreamed.
> >
> > As an example, one would write:
> >
> > <match>
> > <test name="lang">
> > <string>en</string>
> > </test>
> > <test name="locale">
> > <string>ja</string>
> > </test>
> > <edit name="family" mode="prepend" binding="same">
> >
> <string>SomeJapaneseFontWithGoodLatin</string>
> > </edit>
> > </match>
> >
> > It could be easier if we could match on scripts instead of
> languages,
> > but that's another issue.
> >
> > Keith, what do you think?
> >
> > --
> > behdad
> > http://behdad.org/
> >
> > "Those who would give up Essential Liberty to purchase a little
> > Temporary Safety, deserve neither Liberty nor Safety."
> > -- Benjamin Franklin, 1759
> >
> > _______________________________________________
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> > Fontconfig@xxxxxxxxxxxxxxxxxxxxx
> > http://lists.freedesktop.org/mailman/listinfo/fontconfig
> >
--
behdad
http://behdad.org/
"Those who would give up Essential Liberty to purchase a little
Temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin, 1759
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