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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Function.h>
#include <LibJS/Heap/Heap.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/ObjectConstructor.h>
#include <LibJS/Runtime/Shape.h>
namespace JS {
ObjectConstructor::ObjectConstructor()
: NativeFunction("Object", *interpreter().function_prototype())
{
put("prototype", interpreter().object_prototype());
put_native_function("defineProperty", define_property, 3);
put_native_function("getOwnPropertyDescriptor", get_own_property_descriptor, 2);
put_native_function("getOwnPropertyNames", get_own_property_names, 1);
put_native_function("getPrototypeOf", get_prototype_of, 1);
put_native_function("setPrototypeOf", set_prototype_of, 2);
}
ObjectConstructor::~ObjectConstructor()
{
}
Value ObjectConstructor::call(Interpreter& interpreter)
{
return interpreter.heap().allocate<Object>();
}
Value ObjectConstructor::construct(Interpreter& interpreter)
{
return call(interpreter);
}
Value ObjectConstructor::get_own_property_names(Interpreter& interpreter)
{
if (!interpreter.argument_count())
return {};
auto* object = interpreter.argument(0).to_object(interpreter.heap());
if (interpreter.exception())
return {};
auto* result = Array::create(interpreter.global_object());
for (size_t i = 0; i < object->elements().size(); ++i) {
if (!object->elements()[i].is_empty())
result->elements().append(js_string(interpreter, String::number(i)));
}
for (auto& it : object->shape().property_table())
result->elements().append(js_string(interpreter, it.key));
return result;
}
Value ObjectConstructor::get_prototype_of(Interpreter& interpreter)
{
if (!interpreter.argument_count())
return {};
auto* object = interpreter.argument(0).to_object(interpreter.heap());
if (interpreter.exception())
return {};
return object->prototype();
}
Value ObjectConstructor::set_prototype_of(Interpreter& interpreter)
{
if (interpreter.argument_count() < 2)
return {};
auto* object = interpreter.argument(0).to_object(interpreter.heap());
if (interpreter.exception())
return {};
object->set_prototype(&const_cast<Object&>(interpreter.argument(1).as_object()));
return {};
}
Value ObjectConstructor::get_own_property_descriptor(Interpreter& interpreter)
{
if (interpreter.argument_count() < 2)
return interpreter.throw_exception<TypeError>("Object.getOwnPropertyDescriptor() needs 2 arguments");
if (!interpreter.argument(0).is_object())
return interpreter.throw_exception<TypeError>("Object argument is not an object");
auto& object = interpreter.argument(0).as_object();
auto metadata = object.shape().lookup(interpreter.argument(1).to_string());
if (!metadata.has_value())
return js_undefined();
auto* descriptor = interpreter.heap().allocate<Object>();
descriptor->put("configurable", Value(!!(metadata.value().attributes & Attribute::Configurable)));
descriptor->put("enumerable", Value(!!(metadata.value().attributes & Attribute::Enumerable)));
descriptor->put("writable", Value(!!(metadata.value().attributes & Attribute::Writable)));
descriptor->put("value", object.get(interpreter.argument(1).to_string()).value_or(js_undefined()));
return descriptor;
}
Value ObjectConstructor::define_property(Interpreter& interpreter)
{
if (interpreter.argument_count() < 3)
return interpreter.throw_exception<TypeError>("Object.defineProperty() needs 3 arguments");
if (!interpreter.argument(0).is_object())
return interpreter.throw_exception<TypeError>("Object argument is not an object");
if (!interpreter.argument(2).is_object())
return interpreter.throw_exception<TypeError>("Descriptor argument is not an object");
auto& object = interpreter.argument(0).as_object();
auto& descriptor = interpreter.argument(2).as_object();
Value value = descriptor.get("value").value_or(Value());
u8 configurable = descriptor.get("configurable").value_or(Value(false)).to_boolean() * Attribute::Configurable;
u8 enumerable = descriptor.get("enumerable").value_or(Value(false)).to_boolean() * Attribute::Enumerable;
u8 writable = descriptor.get("writable").value_or(Value(false)).to_boolean() * Attribute::Writable;
u8 attributes = configurable | enumerable | writable;
dbg() << "Defining new property " << interpreter.argument(1).to_string() << " with descriptor { " << configurable << ", " << enumerable << ", " << writable << ", attributes=" << attributes << " }";
object.put_own_property(object, interpreter.argument(1).to_string(), attributes, value, PutOwnPropertyMode::DefineProperty);
return &object;
}
}
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