Ladybird: Add quick & dirty port of the JS console from Browser :^)

Ladybird/ConsoleGlobalObject.cpp

@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
+ * Copyright (c) 2022, Andreas Kling <atkinssj@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "ConsoleGlobalObject.h"
+#include <LibJS/Runtime/Completion.h>
+#include <LibWeb/Bindings/NodeWrapper.h>
+#include <LibWeb/Bindings/NodeWrapperFactory.h>
+#include <LibWeb/Bindings/WindowObject.h>
+#include <LibWeb/DOM/Document.h>
+#include <LibWeb/HTML/Window.h>
+
+namespace Ladybird {
+
+ConsoleGlobalObject::ConsoleGlobalObject(Web::Bindings::WindowObject& parent_object)
+    : m_window_object(&parent_object)
+{
+}
+
+void ConsoleGlobalObject::initialize_global_object()
+{
+    Base::initialize_global_object();
+
+    // $0 magic variable
+    define_native_accessor("$0", inspected_node_getter, nullptr, 0);
+}
+
+void ConsoleGlobalObject::visit_edges(Visitor& visitor)
+{
+    Base::visit_edges(visitor);
+    visitor.visit(m_window_object);
+}
+
+JS::ThrowCompletionOr<JS::Object*> ConsoleGlobalObject::internal_get_prototype_of() const
+{
+    return m_window_object->internal_get_prototype_of();
+}
+
+JS::ThrowCompletionOr<bool> ConsoleGlobalObject::internal_set_prototype_of(JS::Object* prototype)
+{
+    return m_window_object->internal_set_prototype_of(prototype);
+}
+
+JS::ThrowCompletionOr<bool> ConsoleGlobalObject::internal_is_extensible() const
+{
+    return m_window_object->internal_is_extensible();
+}
+
+JS::ThrowCompletionOr<bool> ConsoleGlobalObject::internal_prevent_extensions()
+{
+    return m_window_object->internal_prevent_extensions();
+}
+
+JS::ThrowCompletionOr<Optional<JS::PropertyDescriptor>> ConsoleGlobalObject::internal_get_own_property(JS::PropertyKey const& property_name) const
+{
+    if (auto result = TRY(m_window_object->internal_get_own_property(property_name)); result.has_value())
+        return result;
+
+    return Base::internal_get_own_property(property_name);
+}
+
+JS::ThrowCompletionOr<bool> ConsoleGlobalObject::internal_define_own_property(JS::PropertyKey const& property_name, JS::PropertyDescriptor const& descriptor)
+{
+    return m_window_object->internal_define_own_property(property_name, descriptor);
+}
+
+JS::ThrowCompletionOr<bool> ConsoleGlobalObject::internal_has_property(JS::PropertyKey const& property_name) const
+{
+    return TRY(Object::internal_has_property(property_name)) || TRY(m_window_object->internal_has_property(property_name));
+}
+
+JS::ThrowCompletionOr<JS::Value> ConsoleGlobalObject::internal_get(JS::PropertyKey const& property_name, JS::Value receiver) const
+{
+    if (TRY(m_window_object->has_own_property(property_name)))
+        return m_window_object->internal_get(property_name, (receiver == this) ? m_window_object : receiver);
+
+    return Base::internal_get(property_name, receiver);
+}
+
+JS::ThrowCompletionOr<bool> ConsoleGlobalObject::internal_set(JS::PropertyKey const& property_name, JS::Value value, JS::Value receiver)
+{
+    return m_window_object->internal_set(property_name, value, (receiver == this) ? m_window_object : receiver);
+}
+
+JS::ThrowCompletionOr<bool> ConsoleGlobalObject::internal_delete(JS::PropertyKey const& property_name)
+{
+    return m_window_object->internal_delete(property_name);
+}
+
+JS::ThrowCompletionOr<JS::MarkedVector<JS::Value>> ConsoleGlobalObject::internal_own_property_keys() const
+{
+    return m_window_object->internal_own_property_keys();
+}
+
+JS_DEFINE_NATIVE_FUNCTION(ConsoleGlobalObject::inspected_node_getter)
+{
+    auto* this_object = TRY(vm.this_value(global_object).to_object(global_object));
+
+    if (!is<ConsoleGlobalObject>(this_object))
+        return vm.throw_completion<JS::TypeError>(global_object, JS::ErrorType::NotAnObjectOfType, "ConsoleGlobalObject");
+
+    auto console_global_object = static_cast<ConsoleGlobalObject*>(this_object);
+    auto& window = console_global_object->m_window_object->impl();
+    auto* inspected_node = window.associated_document().inspected_node();
+    if (!inspected_node)
+        return JS::js_undefined();
+
+    return Web::Bindings::wrap(global_object, *inspected_node);
+}
+
+}