Vector<std::reference_wrapper<CSSFontFace>> CSSFontFaceSet::matchingFaces(const String& font, const String&, ExceptionCode& ec)
{
Vector<std::reference_wrapper<CSSFontFace>> result;
Ref<MutableStyleProperties> style = MutableStyleProperties::create();
auto parseResult = CSSParser::parseValue(style.ptr(), CSSPropertyFont, font, true, CSSStrictMode, nullptr);
if (parseResult == CSSParser::ParseResult::Error) {
ec = SYNTAX_ERR;
return result;
}
FontTraitsMask fontTraitsMask;
if (auto maskOptional = computeFontTraitsMask(style.get()))
fontTraitsMask = maskOptional.value();
else {
ec = SYNTAX_ERR;
return result;
}
RefPtr<CSSValue> family = style->getPropertyCSSValue(CSSPropertyFontFamily);
if (!is<CSSValueList>(family.get())) {
ec = SYNTAX_ERR;
return result;
}
CSSValueList& familyList = downcast<CSSValueList>(*family);
HashSet<AtomicString> uniqueFamilies;
for (auto& family : familyList) {
const CSSPrimitiveValue& primitive = downcast<CSSPrimitiveValue>(family.get());
if (!primitive.isFontFamily())
continue;
uniqueFamilies.add(primitive.fontFamily().familyName);
}
for (auto& family : uniqueFamilies) {
CSSSegmentedFontFace* faces = getFontFace(fontTraitsMask, family);
if (!faces)
continue;
for (auto& constituentFace : faces->constituentFaces())
result.append(constituentFace.get());
}
return result;
}
