bool ObjectWrapper::Key::hasOwn(JSContext* cx, JS::HandleObject o) {
bool has;
switch (_type) {
case Type::Field:
if (JS_AlreadyHasOwnProperty(cx, o, _field, &has))
return has;
break;
case Type::Index:
if (JS_AlreadyHasOwnElement(cx, o, _idx, &has))
return has;
break;
case Type::Id: {
JS::RootedId id(cx, _id);
if (JS_AlreadyHasOwnPropertyById(cx, o, id, &has))
return has;
break;
}
case Type::InternedString: {
InternedStringId id(cx, _internedString);
if (JS_AlreadyHasOwnPropertyById(cx, o, id, &has))
return has;
break;
}
}
throwCurrentJSException(cx, ErrorCodes::InternalError, "Failed to hasOwn value on a JSObject");
}
js::DOMProxyShadowsResult
DOMProxyShadows(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id)
{
JS::Rooted<JSObject*> expando(cx, DOMProxyHandler::GetExpandoObject(proxy));
JS::Value v = js::GetProxyExtra(proxy, JSPROXYSLOT_EXPANDO);
bool isOverrideBuiltins = !v.isObject() && !v.isUndefined();
if (expando) {
bool hasOwn;
if (!JS_AlreadyHasOwnPropertyById(cx, expando, id, &hasOwn))
return js::ShadowCheckFailed;
if (hasOwn) {
return isOverrideBuiltins ?
js::ShadowsViaIndirectExpando : js::ShadowsViaDirectExpando;
}
}
if (!isOverrideBuiltins) {
// Our expando, if any, didn't shadow, so we're not shadowing at all.
return js::DoesntShadow;
}
bool hasOwn;
if (!GetProxyHandler(proxy)->hasOwn(cx, proxy, id, &hasOwn))
return js::ShadowCheckFailed;
return hasOwn ? js::Shadows : js::DoesntShadowUnique;
}
js::DOMProxyShadowsResult
DOMProxyShadows(JSContext* cx, JS::Handle<JSObject*> proxy, JS::Handle<jsid> id)
{
JS::Value v = js::GetProxyExtra(proxy, JSPROXYSLOT_EXPANDO);
if (v.isObject()) {
bool hasOwn;
if (!JS_AlreadyHasOwnPropertyById(cx, &v.toObject(), id, &hasOwn))
return js::ShadowCheckFailed;
return hasOwn ? js::Shadows : js::DoesntShadow;
}
if (v.isUndefined()) {
return js::DoesntShadow;
}
bool hasOwn;
if (!GetProxyHandler(proxy)->hasOwn(cx, proxy, id, &hasOwn))
return js::ShadowCheckFailed;
return hasOwn ? js::Shadows : js::DoesntShadowUnique;
}