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2d7b495244
Let's start moving towards native JS objects taking their prototype as a constructor argument. This will eventually allow us to move prototypes off of Interpreter and into GlobalObject.
143 lines
6 KiB
C++
143 lines
6 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Function.h>
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#include <LibJS/Heap/Heap.h>
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#include <LibJS/Interpreter.h>
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#include <LibJS/Runtime/Array.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/ObjectConstructor.h>
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#include <LibJS/Runtime/Shape.h>
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namespace JS {
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ObjectConstructor::ObjectConstructor()
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: NativeFunction("Object")
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{
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put("prototype", interpreter().object_prototype());
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put_native_function("defineProperty", define_property, 3);
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put_native_function("getOwnPropertyDescriptor", get_own_property_descriptor, 2);
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put_native_function("getOwnPropertyNames", get_own_property_names, 1);
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put_native_function("getPrototypeOf", get_prototype_of, 1);
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put_native_function("setPrototypeOf", set_prototype_of, 2);
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}
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ObjectConstructor::~ObjectConstructor()
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{
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}
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Value ObjectConstructor::call(Interpreter& interpreter)
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{
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return interpreter.heap().allocate<Object>();
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}
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Value ObjectConstructor::construct(Interpreter& interpreter)
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{
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return call(interpreter);
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}
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Value ObjectConstructor::get_own_property_names(Interpreter& interpreter)
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{
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if (!interpreter.argument_count())
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return {};
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auto* object = interpreter.argument(0).to_object(interpreter.heap());
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if (interpreter.exception())
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return {};
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auto* result = Array::create(interpreter.global_object());
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for (size_t i = 0; i < object->elements().size(); ++i) {
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if (!object->elements()[i].is_empty())
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result->elements().append(js_string(interpreter, String::number(i)));
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}
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for (auto& it : object->shape().property_table())
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result->elements().append(js_string(interpreter, it.key));
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return result;
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}
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Value ObjectConstructor::get_prototype_of(Interpreter& interpreter)
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{
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if (!interpreter.argument_count())
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return {};
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auto* object = interpreter.argument(0).to_object(interpreter.heap());
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if (interpreter.exception())
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return {};
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return object->prototype();
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}
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Value ObjectConstructor::set_prototype_of(Interpreter& interpreter)
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{
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if (interpreter.argument_count() < 2)
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return {};
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auto* object = interpreter.argument(0).to_object(interpreter.heap());
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if (interpreter.exception())
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return {};
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object->set_prototype(&const_cast<Object&>(interpreter.argument(1).as_object()));
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return {};
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}
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Value ObjectConstructor::get_own_property_descriptor(Interpreter& interpreter)
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{
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if (interpreter.argument_count() < 2)
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return interpreter.throw_exception<TypeError>("Object.getOwnPropertyDescriptor() needs 2 arguments");
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if (!interpreter.argument(0).is_object())
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return interpreter.throw_exception<TypeError>("Object argument is not an object");
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auto& object = interpreter.argument(0).as_object();
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auto metadata = object.shape().lookup(interpreter.argument(1).to_string());
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if (!metadata.has_value())
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return js_undefined();
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auto* descriptor = interpreter.heap().allocate<Object>();
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descriptor->put("configurable", Value(!!(metadata.value().attributes & Attribute::Configurable)));
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descriptor->put("enumerable", Value(!!(metadata.value().attributes & Attribute::Enumerable)));
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descriptor->put("writable", Value(!!(metadata.value().attributes & Attribute::Writable)));
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descriptor->put("value", object.get(interpreter.argument(1).to_string()).value_or(js_undefined()));
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return descriptor;
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}
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Value ObjectConstructor::define_property(Interpreter& interpreter)
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{
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if (interpreter.argument_count() < 3)
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return interpreter.throw_exception<TypeError>("Object.defineProperty() needs 3 arguments");
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if (!interpreter.argument(0).is_object())
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return interpreter.throw_exception<TypeError>("Object argument is not an object");
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if (!interpreter.argument(2).is_object())
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return interpreter.throw_exception<TypeError>("Descriptor argument is not an object");
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auto& object = interpreter.argument(0).as_object();
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auto& descriptor = interpreter.argument(2).as_object();
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Value value = descriptor.get("value").value_or(Value());
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u8 configurable = descriptor.get("configurable").value_or(Value(false)).to_boolean() * Attribute::Configurable;
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u8 enumerable = descriptor.get("enumerable").value_or(Value(false)).to_boolean() * Attribute::Enumerable;
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u8 writable = descriptor.get("writable").value_or(Value(false)).to_boolean() * Attribute::Writable;
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u8 attributes = configurable | enumerable | writable;
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dbg() << "Defining new property " << interpreter.argument(1).to_string() << " with descriptor { " << configurable << ", " << enumerable << ", " << writable << ", attributes=" << attributes << " }";
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object.put_own_property(object, interpreter.argument(1).to_string(), attributes, value, PutOwnPropertyMode::DefineProperty);
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return &object;
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}
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}
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