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Make fontconfig default font locale aware

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Application default font should be locale aware in fontconfig db
as in other font databases. We use a hack to obtain the system
default language parsed by fontconfig and use that to find out
the preferred font for a given language (such font list is edited
by fontconfig from fonts.conf in FcConfigSubstitute() process).

Change-Id: I99bb8dd29d2dde2c8019ed8e77f5bfc09ddf3ca5
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@nokia.com>
This commit is contained in:
Jiang Jiang 2012-05-30 16:27:09 +02:00 committed by Qt by Nokia
parent 94492d88a7
commit 47462ffd68
1 changed files with 24 additions and 1 deletions
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25
src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp
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@ -751,7 +751,30 @@ QString QFontconfigDatabase::resolveFontFamilyAlias(const QString &family) const
QFont QFontconfigDatabase::defaultFont() const
{
return QFont(resolveFontFamilyAlias(QString()));
// Hack to get system default language until FcGetDefaultLangs()
// is exported (https://bugs.freedesktop.org/show_bug.cgi?id=32853)
// or https://bugs.freedesktop.org/show_bug.cgi?id=35482 is fixed
FcPattern *dummy = FcPatternCreate();
FcDefaultSubstitute(dummy);
FcChar8 *lang = 0;
FcResult res = FcPatternGetString(dummy, FC_LANG, 0, &lang);
FcPattern *pattern = FcPatternCreate();
if (res == FcResultMatch) {
// Make defaultFont pattern matching locale language aware, because
// certain FC_LANG based custom rules may happen in FcConfigSubstitute()
FcPatternAddString(pattern, FC_LANG, lang);
}
FcConfigSubstitute(0, pattern, FcMatchPattern);
FcDefaultSubstitute(pattern);
FcChar8 *familyAfterSubstitution = 0;
FcPatternGetString(pattern, FC_FAMILY, 0, &familyAfterSubstitution);
QString resolved = QString::fromUtf8((const char *) familyAfterSubstitution);
FcPatternDestroy(pattern);
FcPatternDestroy(dummy);
return QFont(resolved);
}
QT_END_NAMESPACE