ExceptionOr<Ref<FontFace>> FontFace::create(JSC::ExecState& state, Document& document, const String& family, JSC::JSValue source, const Descriptors& descriptors)
{
auto result = adoptRef(*new FontFace(document.fontSelector()));
bool dataRequiresAsynchronousLoading = true;
auto setFamilyResult = result->setFamily(family);
if (setFamilyResult.hasException())
return setFamilyResult.releaseException();
if (source.isString()) {
auto value = FontFace::parseString(source.getString(&state), CSSPropertySrc);
if (!is<CSSValueList>(value.get()))
return Exception { SYNTAX_ERR };
CSSFontFace::appendSources(result->backing(), downcast<CSSValueList>(*value), &document, false);
} else if (auto arrayBufferView = toUnsharedArrayBufferView(source))
dataRequiresAsynchronousLoading = populateFontFaceWithArrayBuffer(result->backing(), arrayBufferView.releaseNonNull());
else if (auto arrayBuffer = toUnsharedArrayBuffer(source)) {
auto arrayBufferView = JSC::Uint8Array::create(arrayBuffer, 0, arrayBuffer->byteLength());
dataRequiresAsynchronousLoading = populateFontFaceWithArrayBuffer(result->backing(), arrayBufferView.releaseNonNull());
}
// These ternaries match the default strings inside the FontFaceDescriptors dictionary inside FontFace.idl.
auto setStyleResult = result->setStyle(descriptors.style.isEmpty() ? ASCIILiteral("normal") : descriptors.style);
if (setStyleResult.hasException())
return setStyleResult.releaseException();
auto setWeightResult = result->setWeight(descriptors.weight.isEmpty() ? ASCIILiteral("normal") : descriptors.weight);
if (setWeightResult.hasException())
return setWeightResult.releaseException();
auto setStretchResult = result->setStretch(descriptors.stretch.isEmpty() ? ASCIILiteral("normal") : descriptors.stretch);
if (setStretchResult.hasException())
return setStretchResult.releaseException();
auto setUnicodeRangeResult = result->setUnicodeRange(descriptors.unicodeRange.isEmpty() ? ASCIILiteral("U+0-10FFFF") : descriptors.unicodeRange);
if (setUnicodeRangeResult.hasException())
return setUnicodeRangeResult.releaseException();
auto setVariantResult = result->setVariant(descriptors.variant.isEmpty() ? ASCIILiteral("normal") : descriptors.variant);
if (setVariantResult.hasException())
return setVariantResult.releaseException();
auto setFeatureSettingsResult = result->setFeatureSettings(descriptors.featureSettings.isEmpty() ? ASCIILiteral("normal") : descriptors.featureSettings);
if (setFeatureSettingsResult.hasException())
return setFeatureSettingsResult.releaseException();
if (!dataRequiresAsynchronousLoading) {
result->backing().load();
ASSERT(result->backing().status() == CSSFontFace::Status::Success);
}
return WTFMove(result);
}
