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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/PrimitiveString.h>
#include <LibJS/Runtime/StringObject.h>
namespace JS {
// 10.4.3.4 StringCreate ( value, prototype ), https://tc39.es/ecma262/#sec-stringcreate
StringObject* StringObject::create(GlobalObject& global_object, PrimitiveString& primitive_string, Object& prototype)
{
return global_object.heap().allocate<StringObject>(global_object, primitive_string, prototype);
}
StringObject::StringObject(PrimitiveString& string, Object& prototype)
: Object(prototype)
, m_string(string)
{
}
StringObject::~StringObject()
{
}
void StringObject::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
Object::initialize(global_object);
define_property(vm.names.length, Value(m_string.string().length()), 0);
}
void StringObject::visit_edges(Cell::Visitor& visitor)
{
Object::visit_edges(visitor);
visitor.visit(&m_string);
}
Optional<PropertyDescriptor> StringObject::get_own_property_descriptor(PropertyName const& property_name) const
{
if (!property_name.is_number() || property_name.as_number() >= m_string.string().length())
return Base::get_own_property_descriptor(property_name);
PropertyDescriptor descriptor;
descriptor.value = js_string(heap(), m_string.string().substring(property_name.as_number(), 1));
descriptor.attributes.set_has_configurable();
descriptor.attributes.set_has_enumerable();
descriptor.attributes.set_has_writable();
descriptor.attributes.set_enumerable();
return descriptor;
}
}
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