3163929990
This patch adds NativeProperty, which can be used to implement object properties that have C++ getters and/or setters. Use this to move String.prototype.length to its correct place. :^)
90 lines
3 KiB
C++
90 lines
3 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/String.h>
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#include <LibJS/Heap.h>
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#include <LibJS/Interpreter.h>
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#include <LibJS/NativeFunction.h>
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#include <LibJS/NativeProperty.h>
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#include <LibJS/Object.h>
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#include <LibJS/Value.h>
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namespace JS {
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Object::Object()
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{
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set_prototype(interpreter().object_prototype());
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}
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Object::~Object()
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{
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}
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Value Object::get(String property_name) const
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{
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const Object* object = this;
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while (object) {
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auto value = object->m_properties.get(property_name);
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if (value.has_value()) {
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if (value.value().is_object() && value.value().as_object()->is_native_property())
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return static_cast<const NativeProperty*>(value.value().as_object())->get(const_cast<Object*>(this));
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return value.value();
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}
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object = object->prototype();
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}
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return js_undefined();
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}
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void Object::put(String property_name, Value value)
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{
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m_properties.set(property_name, move(value));
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}
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void Object::put_native_function(String property_name, AK::Function<Value(Interpreter&, Vector<Value>)> native_function)
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{
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put(property_name, heap().allocate<NativeFunction>(move(native_function)));
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}
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void Object::put_native_property(String property_name, AK::Function<Value(Object*)> getter, AK::Function<void(Object*, Value)> setter)
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{
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put(property_name, heap().allocate<NativeProperty>(move(getter), move(setter)));
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}
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void Object::visit_children(Cell::Visitor& visitor)
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{
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Cell::visit_children(visitor);
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if (m_prototype)
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visitor.visit(m_prototype);
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for (auto& it : m_properties)
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visitor.visit(it.value);
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}
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bool Object::has_own_property(const String& property_name) const
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{
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return m_properties.get(property_name).has_value();
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}
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}
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